* [PATCH] Intel Management Engine Interface
@ 2007-12-11 17:32 Anas Nashif
2007-12-11 18:14 ` Andi Kleen
2007-12-12 8:48 ` Alexander E. Patrakov
0 siblings, 2 replies; 42+ messages in thread
From: Anas Nashif @ 2007-12-11 17:32 UTC (permalink / raw)
To: linux-kernel; +Cc: Andrew Morton
We have addressed the issues raised on lkml after the first submission
of the driver several weeks back and enhanced the driver with better
sysfs support and additional device IDs to support more hardware with
the ME firmware.
The "legacy" device is not really legacy as it is available in most
recent desktops as a firmware options in the ME (AMT 1.0) and is
still supported by Intel and many 3rd party applications; removing
it will break many applications.
The Intel Management Engine Interface (aka HECI: Host Embedded
Controller Interface ) enables communication between the host OS and
the Management Engine firmware. MEI is bi-directional, and either the
host or Intel AMT firmware can initiate transactions.
The core hardware architecture of Intel Active Management Technology
(Intel AMT) is resident in firmware. The micro-controller within the
chipset's graphics and memory controller (GMCH) hub houses the
Management Engine (ME) firmware, which implements various services
on behalf of management applications.
Some of the ME subsystems that can be access via MEI driver:
- Intel(R) Quiet System Technology (QST) is implemented as a firmware
subsystem that runs in the ME. Programs that wish to expose the
health monitoring and fan speed control capabilities of Intel(R) QST
will need to use the MEI driver to communicate with the ME sub-system.
- ASF is the "Alert Standard Format" which is an DMTF manageability
standard. It is implemented in the PC's hardware and firmware, and is
managed from a remote console.
Most recent Intel desktop chipsets have one or more of the above ME
services. The MEI driver will make it possible to support the above
features on Linux and provides applications access to the ME and it's
features.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Signed-off-by: Marek Dabek <marek.dabek@intel.com>
Signed-off-by: Marcin Obara <marcin.obara@intel.com>
---
diff --git a/MAINTAINERS b/MAINTAINERS
index 9a91d9e..7b471bc 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1993,6 +1993,15 @@ M: kernel@wantstofly.org
L: netdev@vger.kernel.org
S: Maintained
+INTEL MANAGEABILITY ENGINE INTERFACE (HECI)
+P: Anas Nashif
+M: anas.nashif@intel.com
+P: Marek Dabek
+M: marek.dabek@intel.com
+W: http://www.openamt.org
+L: openamt-devel@lists.sourceforge.net
+S: Supported
+
INTEL PRO/100 ETHERNET SUPPORT
P: John Ronciak
M: john.ronciak@intel.com
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index b391776..469ad5b 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -1063,6 +1063,7 @@ config DEVPORT
default y
source "drivers/s390/char/Kconfig"
+source "drivers/char/heci/Kconfig"
endmenu
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index c78ff26..c5ca384 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -105,6 +105,7 @@ obj-$(CONFIG_IPMI_HANDLER) += ipmi/
obj-$(CONFIG_HANGCHECK_TIMER) += hangcheck-timer.o
obj-$(CONFIG_TCG_TPM) += tpm/
+obj-$(CONFIG_HECI) += heci/
obj-$(CONFIG_PS3_FLASH) += ps3flash.o
diff --git a/drivers/char/heci/Kconfig b/drivers/char/heci/Kconfig
new file mode 100644
index 0000000..46715de
--- /dev/null
+++ b/drivers/char/heci/Kconfig
@@ -0,0 +1,12 @@
+#
+# HECI device configuration
+#
+
+config HECI
+ tristate "Intel Manageability Engine Interface (HECI) Support"
+ depends on EXPERIMENTAL
+ help
+ The Intel Manageability Engine Interface driver allows
+ applications to access the Active Management Technology
+ firmware via host interface (as opposed to a network interface).
+
diff --git a/drivers/char/heci/Makefile b/drivers/char/heci/Makefile
new file mode 100644
index 0000000..47b2217
--- /dev/null
+++ b/drivers/char/heci/Makefile
@@ -0,0 +1,7 @@
+#
+## Makefile for the Intel MEI driver (heci)
+#
+
+obj-$(CONFIG_HECI) += heci.o
+
+heci-objs := heci_init.o heci_interface.o heci_main.o interrupt.o io_heci.o
diff --git a/drivers/char/heci/heci.h b/drivers/char/heci/heci.h
new file mode 100644
index 0000000..63834dc
--- /dev/null
+++ b/drivers/char/heci/heci.h
@@ -0,0 +1,189 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2007 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_H_
+#define _HECI_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+extern const struct guid heci_pthi_guid;
+extern const struct guid heci_wd_guid;
+extern const __u8 start_wd_params[];
+extern const __u8 stop_wd_params[];
+
+/**
+ * memory IO BAR definition
+ */
+#define BAR_0 0
+#define BAR_1 1
+#define BAR_5 5
+
+/**
+ * heci device ID
+ */
+#define PCI_HECI_DEVICE_ID01 0x2974
+#define PCI_HECI_DEVICE_ID02 0x2984
+#define PCI_HECI_DEVICE_ID03 0x2994
+#define PCI_HECI_DEVICE_ID04 0x29A4
+
+#define PCI_HECI_DEVICE_ID05 0x29B4
+#define PCI_HECI_DEVICE_ID06 0x29C4
+#define PCI_HECI_DEVICE_ID07 0x29D4
+#define PCI_HECI_DEVICE_ID08 0x29E4
+#define PCI_HECI_DEVICE_ID09 0x29F4
+
+#define PCI_HECI_DEVICE_ID10 0x28B4
+#define PCI_HECI_DEVICE_ID11 0x28C4
+#define PCI_HECI_DEVICE_ID12 0x28D4
+#define PCI_HECI_DEVICE_ID13 0x28E4
+#define PCI_HECI_DEVICE_ID14 0x28F4
+
+#define PCI_HECI_DEVICE_ID15 0x2A44
+#define PCI_HECI_DEVICE_ID16 0x2A54
+#define PCI_HECI_DEVICE_ID17 0x2A64
+#define PCI_HECI_DEVICE_ID18 0x2A74
+
+#define PCI_HECI_DEVICE_ID19 0x2E04
+#define PCI_HECI_DEVICE_ID20 0x2E14
+#define PCI_HECI_DEVICE_ID21 0x2E24
+#define PCI_HECI_DEVICE_ID22 0x2E34
+
+/**
+ * heci init function prototypes
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev);
+void heci_reset(struct iamt_heci_device *dev, int interrupts);
+int heci_hw_init(struct iamt_heci_device *dev);
+int heci_initialize_clients(void *data);
+struct heci_file_private *alloc_priv(struct file *file);
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev);
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext);
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id);
+
+/**
+ * interrupt function prototype
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id);
+void heci_wd_timer(unsigned long data);
+
+/**
+ * input output function prototype
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_connect_client(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file);
+
+int heci_ioctl_wd(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_bypass_wd(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int legacy_ioctl_send_msg(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data k_msg,
+ struct file *file);
+
+int legacy_ioctl_recv_msg(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file);
+
+int heci_start_read(struct iamt_heci_device *device, int if_num,
+ struct heci_file_private *file_ext);
+
+int pthi_write(struct iamt_heci_device *device,
+ struct heci_cb_private *priv_cb);
+
+int pthi_read(struct iamt_heci_device *device, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset);
+
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *device,
+ struct file *file, struct heci_file_private *file_ext);
+
+void run_next_legacy_cmd(struct iamt_heci_device *device);
+
+/**
+ * heci_fe_same_id - tell if file extensions have same id
+ * @fe1 -file extension
+ * @fe2 -file extension
+ *
+ * @return :
+ * 1 - if ids are the same,
+ * 0 - if differ.
+ */
+static inline int heci_fe_same_id(struct heci_file_private *fe1,
+ struct heci_file_private *fe2)
+{
+ if ((fe1->host_client_id == fe2->host_client_id)
+ && (fe1->me_client_id == fe2->me_client_id)) {
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+#endif /* _HECI_H_ */
diff --git a/drivers/char/heci/heci_data_structures.h b/drivers/char/heci/heci_data_structures.h
new file mode 100644
index 0000000..83d7cb1
--- /dev/null
+++ b/drivers/char/heci/heci_data_structures.h
@@ -0,0 +1,511 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2007 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_DATA_STRUCTURES_H_
+#define _HECI_DATA_STRUCTURES_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+
+/**
+ * error code definition
+ */
+#define ESLOTS_OVERFLOW 1
+#define ECORRUPTED_MESSAGE_HEADER 1000
+#define ECOMPLETE_MESSAGE 1001
+#define FC_MESSAGE_RESERVED_LENGTH 5
+
+/**
+ * Number of queue lists used by this driver
+ */
+#define NUMBER_OF_LISTS 7
+
+#define LEGACY_MTU 4160
+
+
+/**
+ * HECI HW Section
+ */
+
+/* HECI addresses and defines */
+#define H_CB_WW 0
+#define H_CSR 4
+#define ME_CB_RW 8
+#define ME_CSR_HA 0xC
+
+
+/* register bits - H_CSR */
+
+#define H_CBD 0xFF000000
+#define H_CBWP 0x00FF0000
+#define H_CBRP 0x0000FF00
+#define H_RST 0x00000010
+#define H_RDY 0x00000008
+#define H_IG 0x00000004
+#define H_IS 0x00000002
+#define H_IE 0x00000001
+
+
+/* register bits - ME_CSR_HA */
+#define ME_CBD_HRA 0xFF000000
+#define ME_CBWP_HRA 0x00FF0000
+#define ME_CBRP_HRA 0x0000FF00
+#define ME_RST_HRA 0x00000010
+#define ME_RDY_HRA 0x00000008
+#define ME_IG_HRA 0x00000004
+#define ME_IS_HRA 0x00000002
+#define ME_IE_HRA 0x00000001
+
+/**
+ * heci driver use additional char device for legacy mode
+ */
+#define MINORS_COUNT 2
+
+#define LEGACY_MINOR_NUMBER 0
+#define HECI_MINOR_NUMBER 1
+#define MAX_OPEN_HANDLE_COUNT 253
+
+/**
+ * debug kernel print macro define
+ */
+extern int heci_debug;
+
+#define DBG(format, arg...) do { \
+ if (heci_debug) \
+ printk(KERN_ERR "%s: " format , __func__ , ## arg); \
+} while (0)
+
+
+/**
+ * time to wait event
+ */
+#define HECI_INTEROP_TIMEOUT (HZ * 7)
+
+/**
+ * watch dog definition
+ */
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+
+
+#define HECI_WD_HOST_CLIENT_ID 1
+#define HECI_LEGACY_HOST_CLIENT_ID 2
+
+struct guid {
+ __u32 data1;
+ __u16 data2;
+ __u16 data3;
+ __u8 data4[8];
+} __attribute__((packed));
+
+/* File state */
+enum file_state {
+ HECI_FILE_INITIALIZING = 0,
+ HECI_FILE_CONNECTING,
+ HECI_FILE_CONNECTED,
+ HECI_FILE_DISCONNECTING,
+ HECI_FILE_DISCONNECTED
+};
+
+/* HECI states */
+enum heci_states{
+ HECI_INITIALIZING = 0,
+ HECI_ENABLED,
+ HECI_RESETING,
+ HECI_DISABLED,
+ HECI_RECOVERING_FROM_RESET,
+ HECI_POWER_DOWN,
+ HECI_POWER_UP
+};
+
+enum legacy_states {
+ HECI_LEGACY_IDLE,
+ HECI_LEGACY_WRITING,
+ HECI_LEGACY_FLOW_CONTROL,
+ HECI_LEGACY_READING,
+ HECI_LEGACY_READ_COMPLETE
+};
+
+enum heci_file_transaction_states {
+ HECI_IDLE,
+ HECI_WRITING,
+ HECI_WRITE_COMPLETE,
+ HECI_FLOW_CONTROL,
+ HECI_READING,
+ HECI_READ_COMPLETE
+};
+
+/* HECI CB */
+enum heci_cb_major_types {
+ HECI_READ = 0,
+ HECI_WRITE,
+ HECI_IOCTL,
+ HECI_OPEN,
+ HECI_CLOSE
+};
+
+/* HECI user data struct */
+struct heci_message_data {
+ __u32 size;
+ char *data;
+} __attribute__((packed));
+
+#define SECOND_TO_MILLI 1000
+#define SECOND_TO_MICRO SECOND_TO_MILLI * 1000
+#define SECOND_TO_100NANO SECOND_TO_MICRO * 10
+
+#define CONNECT_TIMEOUT 3 /* at least 2 seconds */
+
+#define LEGACY_STALL_TIMER 12 /* seconds */
+#define LEGACY_READ_TIMER 15 /* seconds */
+
+struct heci_cb_private {
+ struct list_head cb_list;
+ enum heci_cb_major_types major_file_operations;
+ void *file_private;
+ struct heci_message_data request_buffer;
+ struct heci_message_data response_buffer;
+ unsigned long information;
+ unsigned long read_time;
+ struct file *file_object;
+};
+
+/* Private file struct */
+struct heci_file_private {
+ struct list_head link;
+ struct file *file;
+ enum file_state state;
+ wait_queue_head_t tx_wait;
+ wait_queue_head_t rx_wait;
+ wait_queue_head_t wait;
+ spinlock_t file_lock; /* file lock */
+ spinlock_t read_io_lock; /* read lock */
+ spinlock_t write_io_lock; /* write lock */
+ int read_pending;
+ int status;
+ /* ID of client connected */
+ __u8 host_client_id;
+ __u8 me_client_id;
+ __u8 flow_ctrl_creds;
+ __u8 timer_count;
+ enum heci_file_transaction_states reading_state;
+ enum heci_file_transaction_states writing_state;
+ struct heci_cb_private *read_cb;
+};
+
+struct io_heci_list {
+ struct heci_cb_private heci_cb;
+ int status;
+ struct iamt_heci_device *device_extension;
+};
+
+struct heci_driver_version {
+ __u8 major;
+ __u8 minor;
+ __u8 hotfix;
+ __u16 build;
+} __attribute__((packed));
+
+
+struct heci_client {
+ __u32 max_msg_length;
+ __u8 protocol_version;
+} __attribute__((packed));
+
+/*
+ * HECI BUS Interface Section
+ */
+struct heci_msg_hdr {
+ __u32 me_addr:8;
+ __u32 host_addr:8;
+ __u32 length:9;
+ __u32 reserved:6;
+ __u32 msg_complete:1;
+} __attribute__((packed));
+
+
+struct hbm_cmd {
+ __u8 cmd:7;
+ __u8 is_response:1;
+} __attribute__((packed));
+
+
+struct heci_bus_message {
+ struct hbm_cmd cmd;
+ __u8 command_specific_data[];
+} __attribute__((packed));
+
+struct hbm_version {
+ __u8 minor_version;
+ __u8 major_version;
+} __attribute__((packed));
+
+struct hbm_host_version_request {
+ struct hbm_cmd cmd;
+ __u8 reserved;
+ struct hbm_version host_version;
+} __attribute__((packed));
+
+struct hbm_host_version_response {
+ struct hbm_cmd cmd;
+ int host_version_supported;
+ struct hbm_version me_max_version;
+} __attribute__((packed));
+
+struct hbm_host_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_stop_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_me_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_enum_request {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_host_enum_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+ __u8 valid_addresses[32];
+} __attribute__((packed));
+
+struct heci_client_properties {
+ struct guid protocol_name;
+ __u8 protocol_version;
+ __u8 max_number_of_connections;
+ __u8 fixed_address;
+ __u8 single_recv_buf;
+ __u32 max_msg_length;
+} __attribute__((packed));
+
+struct hbm_props_request {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+
+struct hbm_props_response {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 status;
+ __u8 reserved[1];
+ struct heci_client_properties client_properties;
+} __attribute__((packed));
+
+struct hbm_client_connect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved;
+} __attribute__((packed));
+
+struct hbm_client_connect_response {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 status;
+} __attribute__((packed));
+
+struct hbm_client_disconnect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[1];
+} __attribute__((packed));
+
+struct hbm_flow_control {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[FC_MESSAGE_RESERVED_LENGTH];
+} __attribute__((packed));
+
+struct heci_me_client {
+ struct heci_client_properties props;
+ __u8 client_id;
+ __u8 flow_ctrl_creds;
+} __attribute__((packed));
+
+/* private device struct */
+struct iamt_heci_device {
+ struct pci_dev *pdev; /* pointer to pci device struct */
+ /*
+ * lists of queues
+ */
+ /* array of pointers to aio lists */
+ struct io_heci_list *io_list_array[NUMBER_OF_LISTS];
+ struct io_heci_list read_list; /* driver read queue */
+ struct io_heci_list write_list; /* driver write queue */
+ struct io_heci_list write_waiting_list; /* write waiting queue */
+ struct io_heci_list ctrl_wr_list; /* managed write IOCTL list */
+ struct io_heci_list ctrl_rd_list; /* managed read IOCTL list */
+ struct io_heci_list pthi_cmd_list; /* PTHI list for cmd waiting */
+
+ /* driver managed PTHI list for read completed pthi cmd data */
+ struct io_heci_list pthi_read_complete_list;
+ /*
+ * list of files
+ */
+ struct list_head file_list;
+ /*
+ * memory of device
+ */
+ unsigned int mem_base;
+ unsigned int mem_length;
+ char *mem_addr;
+ /*
+ * lock for the device
+ */
+ spinlock_t device_lock; /* device lock*/
+ spinlock_t extra_lock; /* extra lock */
+ /*
+ * intterupts
+ */
+ int irq;
+ struct work_struct work;
+ int recvd_msg;
+
+ struct timer_list timer;
+ struct timer_list wd_timer;
+ /*
+ * hw states of host and fw(ME)
+ */
+ __u32 host_hw_state;
+ __u32 me_hw_state;
+ /*
+ * waiting queue for receive message from FW
+ */
+ wait_queue_head_t wait_recvd_msg;
+ wait_queue_head_t wait_stop_wd;
+ /*
+ * heci device states
+ */
+ enum heci_states heci_state;
+ int stop;
+
+ __u32 extra_write_index;
+ __u32 rd_msg_buf[128]; /* used for control messages */
+ __u32 wr_msg_buf[128]; /* used for control messages */
+ __u32 ext_msg_buf[8]; /* for control responses */
+ __u32 rd_msg_hdr;
+
+ struct hbm_version version;
+
+ int host_buffer_is_empty;
+ struct heci_file_private wd_file_ext;
+ struct heci_me_client *me_clients; /* Note: memory has to be allocated*/
+ __u8 heci_me_clients[32]; /* list of existing clients */
+ __u8 num_heci_me_clients;
+ __u8 heci_host_clients[32]; /* list of existing clients */
+ __u8 current_host_client_id;
+
+ int wd_pending;
+ int wd_stoped;
+ __u16 wd_timeout; /* seconds ((wd_data[1] << 8) + wd_data[0]) */
+ unsigned char wd_data[HECI_START_WD_DATA_SIZE];
+
+
+ __u16 wd_due_counter;
+ int asf_mode;
+ int wd_bypass; /* if 1, don't refresh watchdog ME client */
+
+ /* maybe this is not required */
+ struct file *legacy_file_object;
+ struct heci_file_private legacy_file_ext;
+ int legacy_ioctl;
+ int legacy_canceled;
+ __u32 legacy_timer;
+ __u32 legacy_stall_timer;
+ unsigned char legacy_msg_buf[LEGACY_MTU];
+ __u32 legacy_msg_buf_size;
+ __u32 legacy_msg_buf_index;
+ int legacy_flow_control_pending;
+ enum legacy_states legacy_state;
+
+ struct heci_cb_private *legacy_current_cb;
+ __u8 write_hang;
+ int need_reset;
+ long open_handle_count;
+
+};
+
+/**
+ * read_heci_register - Read a byte from the heci device
+ * @device: the device structure
+ * @offset: offset from which to read the data
+ *
+ * Return:
+ * the byte read.
+ */
+__u32 read_heci_register(struct iamt_heci_device *device,
+ unsigned long offset);
+
+/**
+ * write_heci_register - Write 4 bytes to the heci device
+ * @device: the device structure
+ * @offset: offset from which to write the data
+ *
+ * @value: the byte to write
+ */
+void write_heci_register(struct iamt_heci_device *device, unsigned long offset,
+ __u32 value);
+
+#endif /* _HECI_DATA_STRUCTURES_H_ */
diff --git a/drivers/char/heci/heci_init.c b/drivers/char/heci/heci_init.c
new file mode 100644
index 0000000..3195895
--- /dev/null
+++ b/drivers/char/heci/heci_init.c
@@ -0,0 +1,1080 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2007 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/moduleparam.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+#include <linux/uaccess.h>
+
+#include "heci_data_structures.h"
+#include "heci_interface.h"
+#include "heci.h"
+
+
+const __u8 watch_dog_data[] = {
+ 1, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
+};
+const __u8 start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 };
+const __u8 stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10 };
+const struct guid heci_asf_guid = {
+ 0x75B30CD6, 0xA29E, 0x4AF7,
+ {0xA7, 0x12, 0xE6, 0x17, 0x43, 0x93, 0xC8, 0xA6}
+};
+const struct guid heci_wd_guid = {
+ 0x05B79A6F, 0x4628, 0x4D7F,
+ {0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB}
+};
+const struct guid heci_pthi_guid = {
+ 0x12f80028, 0xb4b7, 0x4b2d,
+ {0xac, 0xa8, 0x46, 0xe0, 0xff, 0x65, 0x81, 0x4c}
+};
+
+
+/**
+ * heci init function prototypes
+ */
+static int host_start_message(struct iamt_heci_device *dev);
+static int host_enum_clients_message(struct iamt_heci_device *dev);
+static int allocate_me_clients_storage(struct iamt_heci_device *dev);
+static void host_init_wd(struct iamt_heci_device *dev);
+static void host_init_legacy(struct iamt_heci_device *dev);
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout);
+
+
+/**
+ * heci_initialize_list - Sets up a queue list.
+ *
+ * @list - An instance of our list structure
+ * @dev -Device object for our driver
+ *
+ * @return :
+ * none;
+ */
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev)
+{
+ /* initialize our queue list */
+ INIT_LIST_HEAD(&list->heci_cb.cb_list);
+ list->status = 0;
+ list->device_extension = dev;
+}
+
+/**
+ * heci_flush_queues - flush our queues list belong to file_ext.
+ *
+ * @dev -Device object for our driver
+ *
+ * @return :
+ * none;
+ */
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int i;
+
+ if (!dev || !file_ext)
+ return;
+
+ /* flush our queue list belong to file_ext */
+ for (i = 0; i < NUMBER_OF_LISTS; i++) {
+ DBG("remove list etnry belong to file_ext\n");
+ heci_flush_list(dev->io_list_array[i], file_ext);
+ }
+}
+
+
+/**
+ * heci_flush_list - remove list etnry belong to file_ext.
+ *
+ * @list - An instance of our list structure
+ * @file_ext -extension of the file object
+
+ * @return :
+ * none;
+ */
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext)
+{
+ struct heci_file_private *file_ext_tmp = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if (!list || !file_ext)
+ return;
+
+ if (list->status == 0
+ && !list_empty(&list->heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos,
+ priv_cb_next, &list->heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos)
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (file_ext_tmp) {
+ if (heci_fe_same_id(file_ext, file_ext_tmp))
+ list_del(&priv_cb_pos->cb_list);
+
+ }
+
+ }
+ }
+}
+
+/**
+ * init_heci_device - allocates and initializes the heci device structure
+ * @pdev: The pci device structure
+ *
+ * @return :
+ * The heci_device_device pointer on success, NULL on failure.
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev)
+{
+ int i;
+ struct iamt_heci_device *device;
+
+ device = kmalloc(sizeof(struct iamt_heci_device), GFP_KERNEL);
+ if (!device)
+ return NULL;
+
+ /* setup our list array */
+ device->io_list_array[0] = &device->read_list;
+ device->io_list_array[1] = &device->write_list;
+ device->io_list_array[2] = &device->write_waiting_list;
+ device->io_list_array[3] = &device->ctrl_wr_list;
+ device->io_list_array[4] = &device->ctrl_rd_list;
+ device->io_list_array[5] = &device->pthi_cmd_list;
+ device->io_list_array[6] = &device->pthi_read_complete_list;
+ INIT_LIST_HEAD(&device->file_list);
+ INIT_LIST_HEAD(&device->wd_file_ext.link);
+ INIT_LIST_HEAD(&device->legacy_file_ext.link);
+ spin_lock_init(&device->device_lock);
+ init_waitqueue_head(&device->wait_recvd_msg);
+ init_waitqueue_head(&device->wait_stop_wd);
+ device->open_handle_count = 0;
+ device->num_heci_me_clients = 0;
+ device->mem_base = 0;
+ device->mem_length = 0;
+ device->extra_write_index = 0;
+ device->rd_msg_hdr = 0;
+ device->mem_addr = NULL;
+ device->asf_mode = 0;
+ device->need_reset = 0;
+ device->recvd_msg = 0;
+ device->heci_state = HECI_INITIALIZING;
+
+ device->num_heci_me_clients = 0;
+ device->legacy_current_cb = NULL;
+ device->legacy_file_object = NULL;
+ device->legacy_canceled = 0;
+ device->legacy_flow_control_pending = 0;
+ device->legacy_state = HECI_LEGACY_IDLE;
+ device->legacy_msg_buf_index = 0;
+ device->wd_pending = 0;
+ device->wd_stoped = 0;
+ device->wd_bypass = 0;
+
+ device->me_clients = NULL;
+ /* init work for schedule work */
+ INIT_WORK(&device->work, NULL);
+ for (i = 0; i < NUMBER_OF_LISTS; i++)
+ heci_initialize_list(device->io_list_array[i], device);
+ device->pdev = pdev;
+ return device;
+}
+
+
+
+
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout)
+{
+ int err = 0;
+
+ err = wait_event_interruptible_timeout(dev->wait_recvd_msg,
+ (dev->recvd_msg), timeout);
+ return err;
+}
+
+/**
+ * heci_hw_init - init host and fw to start work.
+ *
+ * @dev -Device object for our driver
+ *
+ *@return:
+ * 0 on success.
+ * negative on failure
+ */
+int heci_hw_init(struct iamt_heci_device *dev)
+{
+ int err = 0;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ DBG("host_hw_state = 0x%08x, mestate = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ /* acknowledge interrupt and stop interupts */
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ }
+ dev->recvd_msg = 0;
+ DBG("reset in start the heci device.\n");
+
+ heci_reset(dev, 1);
+
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ /* wait for ME to turn on ME_RDY */
+ if (!dev->recvd_msg)
+ err = heci_wait_event_int_timeout(dev, HECI_INTEROP_TIMEOUT);
+
+ if (!err && !dev->recvd_msg) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("wait_event_interruptible_timeout failed"
+ "on wait for ME to turn on ME_RDY.\n");
+ return -ENODEV;
+ } else {
+ if (!(((dev->host_hw_state & H_RDY) == H_RDY)
+ && ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state,
+ dev->me_hw_state);
+
+ if (!(dev->host_hw_state & H_RDY) != H_RDY)
+ DBG("host turn off H_RDY.\n");
+
+ if (!(dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ DBG("ME turn off ME_RDY.\n");
+
+ printk(KERN_ERR
+ "%s: link layer initialization failed.\n",
+ THIS_MODULE->name);
+ return -ENODEV;
+ }
+ }
+ dev->recvd_msg = 0;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+ DBG("ME turn on ME_RDY and host turn on H_RDY.\n");
+ printk(KERN_INFO "%s: link layer has been established.\n",
+ THIS_MODULE->name);
+ return 0;
+}
+
+/**
+ * heci_reset - reset host and fw.
+ *
+ * @dev -Device object for our driver
+ * @interrupts - if interrupt should be enable after reset.
+ *
+ * @return:
+ * none;
+ */
+void heci_reset(struct iamt_heci_device *dev, int interrupts)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int unexpected = 0;
+
+ if (dev->heci_state == HECI_RECOVERING_FROM_RESET) {
+ dev->need_reset = 1;
+ return;
+ }
+
+ if (dev->heci_state != HECI_INITIALIZING &&
+ dev->heci_state != HECI_DISABLED &&
+ dev->heci_state != HECI_POWER_DOWN &&
+ dev->heci_state != HECI_POWER_UP)
+ unexpected = 1;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+
+ DBG("before reset host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ dev->host_hw_state |= (H_RST | H_IG);
+
+ if (interrupts)
+ dev->host_hw_state |= (H_IE);
+ else
+ dev->host_hw_state &= ~(H_IE);
+
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ BUG_ON((dev->host_hw_state & H_RST) != H_RST);
+ BUG_ON((dev->host_hw_state & H_RDY) != 0);
+
+ dev->host_hw_state &= ~H_RST;
+ dev->host_hw_state |= H_IG;
+
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+
+ DBG("currently saved host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ dev->need_reset = 0;
+
+ if (dev->heci_state != HECI_INITIALIZING) {
+ if ((dev->heci_state != HECI_DISABLED) &&
+ (dev->heci_state != HECI_POWER_DOWN))
+ dev->heci_state = HECI_RESETING;
+
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->flow_ctrl_creds = 0;
+ file_pos->read_cb = NULL;
+ file_pos->timer_count = 0;
+ }
+ /* remove entry if already in list */
+ DBG("list del legacy and wd file list.\n");
+ heci_remove_client_from_file_list(dev,
+ dev->wd_file_ext.host_client_id);
+
+ heci_remove_client_from_file_list(dev,
+ dev->legacy_file_ext.host_client_id);
+ /* reset legacy parameters. */
+ dev->legacy_current_cb = NULL;
+ dev->legacy_msg_buf_size = 0;
+ dev->legacy_msg_buf_index = 0;
+ dev->legacy_canceled = 0;
+ dev->legacy_file_ext.file = NULL;
+ dev->legacy_ioctl = 0;
+ dev->legacy_state = HECI_LEGACY_IDLE;
+ dev->legacy_timer = 0;
+ dev->wd_due_counter = 0;
+ dev->extra_write_index = 0;
+ dev->wd_pending = 0;
+ }
+
+ dev->num_heci_me_clients = 0;
+ dev->rd_msg_hdr = 0;
+ dev->stop = 0;
+ dev->wd_pending = 0;
+
+ /* update the state of the registers after reset */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ DBG("after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if (unexpected)
+ printk(KERN_ERR "%s: unexpected heci reset.\n",
+ THIS_MODULE->name);
+
+ /* Wake up all readings so they can be interrupted */
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (&file_pos->rx_wait &&
+ waitqueue_active(&file_pos->rx_wait)) {
+ printk(KERN_INFO "%s: Waking up client!\n",
+ THIS_MODULE->name);
+ wake_up_interruptible(&file_pos->rx_wait);
+ }
+ }
+ /* remove all waiting requests */
+ if (dev->write_list.status == 0 &&
+ !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos) {
+ list_del(&priv_cb_pos->cb_list);
+ kfree(priv_cb_pos->request_buffer.data);
+ priv_cb_pos->request_buffer.data = NULL;
+ kfree(priv_cb_pos->response_buffer.data);
+ priv_cb_pos->response_buffer.data = NULL;
+ kfree(priv_cb_pos);
+ priv_cb_pos = NULL;
+ }
+ }
+ }
+}
+
+/**
+ * heci_initialize_clients - routine.
+ *
+ * @dev -Device object for our driver
+ *
+ * @return:
+ * none;
+ */
+int heci_initialize_clients(void *data)
+{
+ int status;
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ msleep(100); /* FW needs time to be ready to talk with us */
+ DBG("link is established start sending messages.\n");
+ /* link is established start sending messages. */
+ status = host_start_message(dev);
+ if (status) {
+ DBG("start sending messages failed.\n");
+ return -ENODEV;
+ }
+ /* enumerate clients */
+
+ status = host_enum_clients_message(dev);
+ if (status) {
+ DBG("enum clients failed.\n");
+ return -ENODEV;
+ }
+ /* allocate storage for ME clients representation */
+ status = allocate_me_clients_storage(dev);
+ if (status) {
+ DBG("allocate clients failed.\n");
+ return -ENODEV;
+ }
+ /*heci initialization wd */
+ host_init_wd(dev);
+ /*heci initialization legacy client */
+ host_init_legacy(dev);
+ if (dev->need_reset) {
+ dev->need_reset = 0;
+ dev->heci_state = HECI_DISABLED;
+ return -ENODEV;
+ }
+
+ memset(dev->heci_host_clients, 0, sizeof(dev->heci_host_clients));
+ dev->open_handle_count = 0;
+ dev->heci_host_clients[0] |= 7;
+ dev->current_host_client_id = 3;
+ dev->heci_state = HECI_ENABLED;
+ DBG("initialization heci clients successful.\n");
+ return 0;
+}
+
+/**
+ * host_start_message - heci host send start message.
+ *
+ * @dev - Device object for our driver
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+static int host_start_message(struct iamt_heci_device *dev)
+{
+ long timeout = 60; /* 60 second */
+
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_version_request *host_start_req;
+ struct hbm_host_stop_request *host_stop_req;
+ int err = 0;
+
+ /* host start message */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_version_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_start_req =
+ (struct hbm_host_version_request *) &dev->wr_msg_buf[1];
+ memset(host_start_req, 0, sizeof(host_start_req));
+ host_start_req->cmd.cmd = HOST_START_REQ_CMD;
+ host_start_req->reserved = 0;
+ host_start_req->host_version.major_version = HBM_MAJOR_VERSION;
+ host_start_req->host_version.minor_version = HBM_MINOR_VERSION;
+ dev->recvd_msg = 0;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_start_req),
+ heci_hdr->length)) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("send version to fw fail.\n");
+ return -ENODEV;
+ }
+ DBG("call wait_event_interruptible_timeout for response message.\n");
+ /* wait for response */
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("wait_timeout failed on host start response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ DBG("wait_timeout successful on host start response message.\n");
+ if ((dev->version.major_version != HBM_MAJOR_VERSION) ||
+ (dev->version.minor_version != HBM_MINOR_VERSION)) {
+ /* send stop message */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_stop_req =
+ (struct hbm_host_stop_request *) &dev->wr_msg_buf[1];
+
+ memset(host_stop_req, 0, sizeof(host_stop_req));
+ host_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ host_stop_req->reason = DRIVER_STOP_REQUEST;
+ memset(host_stop_req->reserved, 0,
+ sizeof(host_stop_req->reserved));
+ heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_stop_req),
+ heci_hdr->length);
+ DBG("version mismatch.\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/**
+ * host_enum_clients_message - host send enumeration client request message.
+ *
+ * @dev - Device object for our driver
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+static int host_enum_clients_message(struct iamt_heci_device *dev)
+{
+ long timeout = 5; /*5 second */
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_enum_request *host_enum_req;
+ int err = 0;
+ __u8 i, j;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ /* enumerate clients */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_enum_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1];
+ memset(host_enum_req, 0, sizeof(host_enum_req));
+ host_enum_req->cmd.cmd = HOST_ENUM_REQ_CMD;
+ memset(host_enum_req->reserved, 0, sizeof(host_enum_req->reserved));
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_enum_req),
+ heci_hdr->length)) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("send enumeration request fail.\n");
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("wait_event_interruptible_timeout failed "
+ "on enumeration cients response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ /* count how many ME clients we have */
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0)
+ dev->num_heci_me_clients++;
+
+ }
+ }
+ return 0;
+}
+
+/**
+ * allocate_me_clients_storage - allocate storage for me clients
+ *
+ * @dev - Device object for our driver
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+static int allocate_me_clients_storage(struct iamt_heci_device *dev)
+{
+ long timeout = 10; /*10 second */
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_props_request *host_cli_req;
+ __u8 num, i, j;
+ int err;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ /* allocate storage for ME clients representation */
+
+ if (dev->num_heci_me_clients <= 0)
+ return 0;
+
+ kfree(dev->me_clients);
+ dev->me_clients = kcalloc(dev->num_heci_me_clients,
+ sizeof(struct heci_me_client), GFP_KERNEL);
+ if (!dev->me_clients) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("allocate me clents memory failed.\n");
+ return -ENOMEM;
+ }
+
+ num = 0;
+
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0) {
+ struct heci_me_client *client;
+ client = &dev->me_clients[num];
+
+ client->client_id = (i * 8) + j;
+ client->flow_ctrl_creds = 0;
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length =
+ sizeof(struct hbm_props_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_cli_req =
+ (struct hbm_props_request *)
+ &dev->wr_msg_buf[1];
+
+ memset(host_cli_req, 0,
+ sizeof(struct hbm_props_request));
+ host_cli_req->cmd.cmd =
+ HOST_CLIENT_PROPERTEIS_REQ_CMD;
+ host_cli_req->address = client->client_id;
+
+ memset(host_cli_req->reserved, 0,
+ sizeof(host_cli_req->reserved));
+ if (!heci_write_message(dev,
+ heci_hdr,
+ (unsigned char *) (host_cli_req),
+ heci_hdr->length)) {
+ DBG("send props request fail.\n");
+ dev->heci_state = HECI_DISABLED;
+ kfree(dev->me_clients);
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev,
+ timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait failed on props resp msg\n");
+ dev->heci_state = HECI_DISABLED;
+ kfree(dev->me_clients);
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ num++;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * host_init_wd - heci initialization wd.
+ *
+ * @dev - Device object for our driver
+ *
+ * @return :
+ * none;
+ */
+static void host_init_wd(struct iamt_heci_device *dev)
+{
+ long timeout = 15; /*15 second */
+ __u8 i;
+ int err = 0;
+
+ /* look for WD client and connect to it */
+ spin_lock_init(&dev->wd_file_ext.file_lock);
+ init_waitqueue_head(&dev->wd_file_ext.wait);
+ dev->wd_file_ext.file = NULL;
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTED;
+ dev->wd_timeout = 0;
+ dev->asf_mode = 0;
+ /* find ME ASF client - otherwise assume AMT mode */
+ DBG("find ME ASF client - otherwise assume AMT mode.\n");
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_asf_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ dev->asf_mode = 1;
+ DBG("found ME ASF client.\n");
+ }
+ }
+ if (dev->asf_mode) {
+ memcpy(dev->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
+ } else {
+ /* AMT mode */
+ DBG("assume AMT mode.\n");
+ dev->wd_timeout = AMT_WD_VALUE;
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ memcpy(dev->wd_data, start_wd_params, HECI_WD_PARAMS_SIZE);
+ memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
+ &dev->wd_timeout, sizeof(__u16));
+ }
+
+ /* find ME WD client */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_wd_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->wd_file_ext.me_client_id =
+ dev->me_clients[i].client_id;
+ dev->wd_file_ext.state =
+ HECI_FILE_CONNECTING;
+ dev->wd_file_ext.host_client_id =
+ HECI_WD_HOST_CLIENT_ID;
+
+ dev->wd_file_ext.flow_ctrl_creds = 0;
+ dev->wd_file_ext.timer_count = 0;
+ list_add_tail(&dev->wd_file_ext.link, &dev->file_list);
+ spin_unlock_bh(&dev->device_lock);
+ break;
+ }
+ }
+ DBG("check wd_file_ext\n");
+ if (HECI_FILE_CONNECTING == dev->wd_file_ext.state) {
+ if (heci_connect(dev, &dev->wd_file_ext)) {
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == dev->wd_file_ext.state ||
+ HECI_FILE_DISCONNECTED == dev->wd_file_ext.state),
+ timeout * HZ);
+ if (HECI_FILE_CONNECTED == dev->wd_file_ext.state) {
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 1;
+ else
+ dev->wd_due_counter = 0;
+
+ DBG("successfully to connect to WD client.\n");
+ } else {
+ heci_remove_client_from_file_list(dev,
+ dev->wd_file_ext.host_client_id);
+ if (HECI_FILE_CONNECTED !=
+ dev->wd_file_ext.state)
+ DBG("wrong status for WD client.\n");
+
+ if (!err)
+ DBG("failed connect err=%08x\n", err);
+
+ DBG("failed to connect to WD client.\n");
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTED;
+ }
+ } else {
+ DBG("failed to call heci_connect for wd_file_ext.\n");
+ heci_remove_client_from_file_list(dev,
+ dev->wd_file_ext.host_client_id);
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTED;
+ }
+ } else
+ DBG("failed to find WD client.\n");
+
+
+ dev->wd_timer.function = &heci_wd_timer;
+ dev->wd_timer.data = (unsigned long) dev;
+}
+
+
+/**
+ * host_init_legacy - heci initialization legacy client.
+ *
+ * @dev - Device object for our driver
+ *
+ * @return :
+ * none;
+ */
+static void host_init_legacy(struct iamt_heci_device *dev)
+{
+ long timeout = 15; /*15 second */
+ __u8 i;
+ int err;
+
+ spin_lock_init(&dev->legacy_file_ext.file_lock);
+ init_waitqueue_head(&dev->legacy_file_ext.wait);
+ spin_lock_init(&dev->legacy_file_ext.read_io_lock);
+ spin_lock_init(&dev->legacy_file_ext.
+ write_io_lock);
+ init_waitqueue_head(&dev->legacy_file_ext.rx_wait);
+ init_waitqueue_head(&dev->legacy_file_ext.tx_wait);
+ dev->legacy_file_ext.reading_state = HECI_IDLE;
+ dev->legacy_file_ext.writing_state = HECI_IDLE;
+ dev->legacy_file_ext.read_pending = 0;
+ dev->legacy_file_ext.flow_ctrl_creds = 0;
+ dev->legacy_file_ext.read_cb = NULL;
+ /* look for legacy client and connect to it */
+ dev->legacy_file_ext.file = NULL;
+ dev->legacy_file_ext.state = HECI_FILE_DISCONNECTED;
+
+ /* find ME PTHI client */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_pthi_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->legacy_file_ext.me_client_id =
+ dev->me_clients[i].client_id;
+ dev->legacy_file_ext.state =
+ HECI_FILE_CONNECTING;
+ dev->legacy_file_ext.host_client_id =
+ HECI_LEGACY_HOST_CLIENT_ID;
+ dev->legacy_file_ext.flow_ctrl_creds = 0;
+ dev->legacy_file_ext.timer_count = 0;
+ list_add_tail(&dev->legacy_file_ext.link,
+ &dev->file_list);
+ spin_unlock_bh(&dev->device_lock);
+ break;
+ }
+ }
+ if (dev->asf_mode) {
+ dev->legacy_file_ext.state =
+ HECI_FILE_DISCONNECTED;
+ heci_remove_client_from_file_list(dev,
+ dev->legacy_file_ext.host_client_id);
+ return;
+ }
+ if (dev->legacy_file_ext.state == HECI_FILE_CONNECTING) {
+ BUG_ON(dev->me_clients[i].props.max_msg_length != LEGACY_MTU);
+
+
+ if (dev->me_clients[i].props.max_msg_length < LEGACY_MTU) {
+ dev->legacy_file_ext.state = HECI_FILE_DISCONNECTED;
+ DBG("legacy client buffer too small.\n");
+ } else {
+ if (heci_connect(dev, &dev->legacy_file_ext)) {
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (dev->legacy_file_ext.state ==
+ HECI_FILE_CONNECTED ||
+ dev->legacy_file_ext.state ==
+ HECI_FILE_DISCONNECTED),
+ timeout * HZ);
+ if ((dev->legacy_file_ext.state !=
+ HECI_FILE_CONNECTED)) {
+ heci_remove_client_from_file_list(dev,
+ dev->legacy_file_ext.host_client_id);
+ DBG("failed connect to legacy.\n");
+ dev->legacy_file_ext.state =
+ HECI_FILE_DISCONNECTED;
+ } else {
+ DBG("OK to connect legacy client.\n");
+ dev->legacy_state = HECI_LEGACY_IDLE;
+ }
+ } else {
+ DBG("failed to heci_connect for legacy.\n");
+ heci_remove_client_from_file_list(dev,
+ dev->legacy_file_ext.host_client_id);
+ dev->legacy_file_ext. state =
+ HECI_FILE_DISCONNECTED;
+ }
+ }
+ } else {
+ if (!dev->asf_mode)
+ DBG("failed to find legacy client.\n");
+
+ }
+}
+
+/**
+ * alloc_priv - allocates a private file structure and set it up.
+ * @file: the file structure
+ *
+ * @return :
+ * The allocated file or NULL on failure
+ */
+struct heci_file_private *alloc_priv(struct file *file)
+{
+ struct heci_file_private *priv;
+
+ priv = kmalloc(sizeof(struct heci_file_private), GFP_KERNEL);
+ if (!priv)
+ return NULL;
+
+
+ spin_lock_init(&priv->file_lock);
+ spin_lock_init(&priv->read_io_lock);
+ spin_lock_init(&priv->write_io_lock);
+ init_waitqueue_head(&priv->wait);
+ init_waitqueue_head(&priv->rx_wait);
+ DBG("priv->rx_wait =%p\n", &priv->rx_wait);
+ init_waitqueue_head(&priv->tx_wait);
+ INIT_LIST_HEAD(&priv->link);
+ priv->reading_state = HECI_IDLE;
+ priv->writing_state = HECI_IDLE;
+ priv->file = file;
+ priv->flow_ctrl_creds = 0;
+ priv->timer_count = 0;
+ priv->me_client_id = 0;
+ priv->read_cb = NULL;
+ priv->status = 0;
+ priv->read_pending = 0;
+ return priv;
+}
+
+
+
+/**
+ * heci_disconnect_host_client - send disconnect message to fw from host client.
+ *
+ * @dev -Device object for our driver
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0, err = 0;
+ long timeout = 15; /*15 second */
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_file_private *file_temp = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if ((!dev) || (!file_ext))
+ return -ENODEV;
+
+ priv_cb = kmalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ if (file_ext->state == HECI_FILE_DISCONNECTING) {
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->file_private = file_ext;
+ priv_cb->major_file_operations = HECI_CLOSE;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (heci_disconnect(dev, file_ext)) {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ DBG("failed to call heci_disconnect.\n");
+ goto free;
+ }
+ } else {
+ priv_cb->file_private = file_ext;
+ DBG("add disconnect cb to control write list\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+ if (HECI_FILE_DISCONNECTED == file_ext->state) {
+ rets = 0;
+ DBG("successfully to disconnect from fw client.\n");
+ } else {
+ rets = -ENODEV;
+ if (HECI_FILE_DISCONNECTED != file_ext->state)
+ DBG("wrong status client disconnect.\n");
+
+ if (!err)
+ DBG("wait failed disconnect err=%08x\n", err);
+
+ DBG("failed to diconnect to fw client.\n");
+ }
+
+ }
+
+ if (priv_cb) {
+ spin_lock_bh(&dev->device_lock);
+ if (dev->ctrl_rd_list.status == 0 &&
+ !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_temp) {
+ if (heci_fe_same_id(file_ext,
+ file_temp))
+ list_del(&priv_cb_pos->cb_list);
+
+ }
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+free:
+ kfree(priv_cb);
+ priv_cb = NULL;
+ }
+ return rets;
+}
+
+
+/**
+ * heci_remove_client_from_file_list -
+ * remove file extension from device file list
+ *
+ * @dev -Device object for our driver
+ * @host_client_id -host client id to be removed
+ *
+ * @return :
+ * none;
+ */
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (host_client_id == file_pos->host_client_id) {
+ DBG("remove host client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del(&file_pos->link);
+ break;
+ }
+ }
+}
diff --git a/drivers/char/heci/heci_interface.c b/drivers/char/heci/heci_interface.c
new file mode 100644
index 0000000..ba78692
--- /dev/null
+++ b/drivers/char/heci/heci_interface.c
@@ -0,0 +1,503 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2007 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include "heci.h"
+#include "heci_interface.h"
+
+
+
+static const __u8 interface_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10};
+static const __u8 interface_stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10};
+
+/**
+ * read_heci_register - Read a byte from the heci device
+ * @device: the device structure
+ * @offset: offset from which to read the data
+ *
+ * Return:
+ * the byte read.
+ */
+__u32 read_heci_register(struct iamt_heci_device *device,
+ unsigned long offset)
+{
+ return readl(device->mem_addr + offset);
+}
+
+/**
+ * write_heci_register - Write 4 bytes to the heci device
+ * @device: the device structure
+ * @offset: offset from which to write the data
+ *
+ * @value: the byte to write
+ */
+void write_heci_register(struct iamt_heci_device *device, unsigned long offset,
+ __u32 value)
+{
+ writel(value, device->mem_addr + offset);
+}
+
+/**
+ * host_buffer_is_empty - check if host buffer is empty.
+ *
+ * @dev -Device object for our driver
+ *
+ * @return :
+ * 1 if empty
+ * 0 - otherwise.
+ */
+int host_buffer_is_empty(struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+ unsigned char buffer_depth, filled_slots, empty_slots;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8);
+ write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16);
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = (unsigned char) (write_ptr - read_ptr);
+ empty_slots = buffer_depth - filled_slots;
+
+ if (filled_slots > 0)
+ return 0;
+
+ return 1;
+}
+
+/**
+ * count_empty_write_slots - count write empty slots.
+ *
+ * @dev - Device object for our driver
+ *
+ *
+ * @return :
+ * -1(ESLOTS_OVERFLOW) if overflow
+ * otherwise filed slots count
+ */
+__s32 count_empty_write_slots(struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+ unsigned char buffer_depth, filled_slots, empty_slots;
+
+ read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8);
+ write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16);
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = (unsigned char) (write_ptr - read_ptr);
+ empty_slots = buffer_depth - filled_slots;
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ return (__s32) empty_slots;
+}
+
+/**
+ * heci_write_message - write a message to heci device.
+ *
+ * @heci_hdr - header of message
+ * @write_buffer - message buffer will be write
+ * @write_length - message size will be write
+ *
+ * @return :
+ * 1 if success
+ * 0 - otherwise.
+ */
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length)
+{
+ __u32 temp_msg = 0;
+ unsigned long bytes_written = 0;
+ char read_ptr, write_ptr;
+ unsigned char buffer_depth, filled_slots, empty_slots;
+ unsigned long dw_to_write;
+
+ dw_to_write = ((write_length + 3) / 4);
+ DBG("host_hw_state = 0x%08x.\n", dev->host_hw_state);
+ DBG("heci_write_message header=%08x.\n", *((__u32 *) header));
+
+ read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8);
+ write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16);
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = (unsigned char) (write_ptr - read_ptr);
+ empty_slots = buffer_depth - filled_slots;
+ DBG("filled = %hu, empty = %hu.\n", filled_slots, empty_slots);
+
+ if (dw_to_write > empty_slots)
+ return 0;
+
+ write_heci_register(dev, H_CB_WW, *((__u32 *) header));
+
+ while (write_length >= 4) {
+ write_heci_register(dev, H_CB_WW,
+ *(__u32 *) (write_buffer + bytes_written));
+ bytes_written += 4;
+ write_length -= 4;
+ }
+
+ if (write_length > 0) {
+ memcpy(&temp_msg, &write_buffer[bytes_written], write_length);
+ write_heci_register(dev, H_CB_WW, temp_msg);
+ }
+
+ dev->host_hw_state |= H_IG;
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ if ((dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ return 0;
+
+ dev->write_hang = 0;
+ return 1;
+}
+
+/**
+ * count_full_read_slots - reset host and fw.
+ *
+ * @dev -Device object for our driver
+ *
+ *
+ * @return :
+ * -1(ESLOTS_OVERFLOW) if overflow
+ * otherwise filed slots count
+ */
+__s32 count_full_read_slots(struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+ unsigned char buffer_depth, filled_slots, empty_slots;
+
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ read_ptr = (char) ((dev->me_hw_state & ME_CBRP_HRA) >> 8);
+ write_ptr = (char) ((dev->me_hw_state & ME_CBWP_HRA) >> 16);
+ buffer_depth = (unsigned char)((dev->me_hw_state & ME_CBD_HRA) >> 24);
+ filled_slots = (unsigned char) (write_ptr - read_ptr);
+ empty_slots = buffer_depth - filled_slots;
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ DBG("filled_slots =%08x \n", filled_slots);
+ return (__s32) filled_slots;
+}
+
+/**
+ * heci_read_slots - read a message from heci device.
+ *
+ * @dev - device object for our driver
+ * @buffer - message buffer will be write
+ * @buffer_length - message size will be read
+ *
+ * @return :
+ * none;
+ */
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length)
+{
+ __u32 i = 0;
+ unsigned char temp_buf[sizeof(__u32)];
+
+ while (buffer_length >= sizeof(__u32)) {
+ ((__u32 *) buffer)[i] = read_heci_register(dev, ME_CB_RW);
+ DBG("buffer[%d]= %d\n", i, ((__u32 *) buffer)[i]);
+ i++;
+ buffer_length -= sizeof(__u32);
+ }
+
+ if (buffer_length > 0) {
+ *((__u32 *) &temp_buf) = read_heci_register(dev, ME_CB_RW);
+ memcpy(&buffer[i * 4], temp_buf, buffer_length);
+ }
+
+ dev->host_hw_state |= H_IG;
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+}
+
+/**
+ * flow_ctrl_creds - check flow_control credentials.
+ *
+ * @dev -Device object for our driver
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 1 if flow_ctrl_creds >0
+ * 0 - otherwise.
+ */
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return 0;
+
+ if (file_ext == NULL)
+ return 0;
+
+ if (file_ext->flow_ctrl_creds > 0)
+ return 1;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].flow_ctrl_creds > 0) {
+ BUG_ON(dev->me_clients[i].props.single_recv_buf
+ == 0);
+ return 1;
+ }
+ return 0;
+ }
+ }
+ BUG_ON(1);
+ return 0;
+}
+
+/**
+ * flow_ctrl_reduce - reduce flow_control .
+ *
+ * @dev -Device object for our driver
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * none;
+ */
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].props.single_recv_buf != 0) {
+ BUG_ON(dev->me_clients[i].flow_ctrl_creds <= 0);
+ dev->me_clients[i].flow_ctrl_creds--;
+ } else {
+ BUG_ON(file_ext->flow_ctrl_creds <= 0);
+ file_ext->flow_ctrl_creds--;
+ }
+ return;
+ }
+ }
+ BUG_ON(1);
+}
+
+/**
+ * heci_send_flow_control - send flow control to fw.
+ *
+ * @dev -Device object for our driver
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 1 if success
+ * 0 - otherwise.
+ */
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_flow_control *heci_flow_control;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_flow_control);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_flow_control = (struct hbm_flow_control *) &dev->wr_msg_buf[1];
+ memset(heci_flow_control, 0, sizeof(heci_flow_control));
+ heci_flow_control->host_addr = file_ext->host_client_id;
+ heci_flow_control->me_addr = file_ext->me_client_id;
+ heci_flow_control->cmd.cmd = FLOW_CONTROL_CMD;
+ memset(heci_flow_control->reserved, 0,
+ sizeof(heci_flow_control->reserved));
+ DBG("sending flow control host client = %d, me client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_flow_control,
+ sizeof(struct hbm_flow_control)))
+ return 0;
+
+ return 1;
+
+}
+
+/**
+ * other_client_is_connecting - check if other
+ * client with the same client id is connected.
+ *
+ * @dev -Device object for our driver
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 1 if other client is connected.
+ * 0 - otherwise.
+ */
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if ((file_pos->state == HECI_FILE_CONNECTING)
+ && (file_pos != file_ext)
+ && file_ext->me_client_id == file_pos->me_client_id)
+ return 1;
+
+ }
+ return 0;
+}
+
+/**
+ * heci_send_wd - send watch dog message to fw.
+ *
+ * @dev -Device object for our driver
+ *
+ * @return :
+ * 1 if success
+ * 0 - otherwise.
+ */
+int heci_send_wd(struct iamt_heci_device *dev)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = dev->wd_file_ext.host_client_id;
+ heci_hdr->me_addr = dev->wd_file_ext.me_client_id;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ if (!memcmp(dev->wd_data, interface_start_wd_params,
+ HECI_WD_PARAMS_SIZE)) {
+ heci_hdr->length = HECI_START_WD_DATA_SIZE;
+ } else {
+ BUG_ON(memcmp(dev->wd_data, interface_stop_wd_params,
+ HECI_WD_PARAMS_SIZE));
+ heci_hdr->length = HECI_WD_PARAMS_SIZE;
+ }
+
+ if (!heci_write_message(dev, heci_hdr, dev->wd_data, heci_hdr->length))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_disconnect - send disconnect message to fw.
+ *
+ * @dev -Device object for our driver
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 1 if success
+ * 0 - otherwise.
+ */
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_disconnect_request *heci_cli_disconnect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_disconnect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_disconnect =
+ (struct hbm_client_disconnect_request *) &dev->wr_msg_buf[1];
+ memset(heci_cli_disconnect, 0, sizeof(heci_cli_disconnect));
+ heci_cli_disconnect->host_addr = file_ext->host_client_id;
+ heci_cli_disconnect->me_addr = file_ext->me_client_id;
+ heci_cli_disconnect->cmd.cmd = CLIENT_DISCONNECT_REQ_CMD;
+ heci_cli_disconnect->reserved[0] = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_disconnect,
+ sizeof(struct hbm_client_disconnect_request)))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_connect - send connect message to fw.
+ *
+ * @dev -Device object for our driver
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 1 if success
+ * 0 - otherwise.
+ */
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_request *heci_cli_connect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_connect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_connect =
+ (struct hbm_client_connect_request *) &dev->wr_msg_buf[1];
+ heci_cli_connect->host_addr = file_ext->host_client_id;
+ heci_cli_connect->me_addr = file_ext->me_client_id;
+ heci_cli_connect->cmd.cmd = CLIENT_CONNECT_REQ_CMD;
+ heci_cli_connect->reserved = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_connect,
+ sizeof(struct hbm_client_connect_request)))
+ return 0;
+
+ return 1;
+}
diff --git a/drivers/char/heci/heci_interface.h b/drivers/char/heci/heci_interface.h
new file mode 100644
index 0000000..1ae5d5b
--- /dev/null
+++ b/drivers/char/heci/heci_interface.h
@@ -0,0 +1,176 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2007 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#ifndef _HECI_INTERFACE_H_
+#define _HECI_INTERFACE_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+
+#define HBM_MINOR_VERSION 0
+#define HBM_MAJOR_VERSION 1
+#define HBM_TIMEOUT 1 /* 1 second */
+
+
+#define HOST_START_REQ_CMD 0x01
+#define HOST_START_RES_CMD 0x81
+
+#define HOST_STOP_REQ_CMD 0x02
+#define HOST_STOP_RES_CMD 0x82
+
+#define ME_STOP_REQ_CMD 0x03
+
+#define HOST_ENUM_REQ_CMD 0x04
+#define HOST_ENUM_RES_CMD 0x84
+
+#define HOST_CLIENT_PROPERTEIS_REQ_CMD 0x05
+#define HOST_CLIENT_PROPERTEIS_RES_CMD 0x85
+
+#define CLIENT_CONNECT_REQ_CMD 0x06
+#define CLIENT_CONNECT_RES_CMD 0x86
+
+#define CLIENT_DISCONNECT_REQ_CMD 0x07
+#define CLIENT_DISCONNECT_RES_CMD 0x87
+
+#define FLOW_CONTROL_CMD 0x08
+
+
+#define AMT_WD_VALUE 120 /* seconds */
+
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+
+/* IOCTL commands */
+#define HECI_IOCTL_LETTER 'H'
+
+
+#define IOCTL_HECI_GET_VERSION \
+ _IOWR(HECI_IOCTL_LETTER , 0x800, struct heci_message_data)
+#define IOCTL_HECI_CONNECT_CLIENT \
+ _IOWR(HECI_IOCTL_LETTER , 0x801, struct heci_message_data)
+#define IOCTL_HECI_WD \
+ _IOWR(HECI_IOCTL_LETTER , 0x802, struct heci_message_data)
+#define IOCTL_HECI_BYPASS_WD \
+ _IOWR(HECI_IOCTL_LETTER , 0x810, struct heci_message_data)
+
+#define IAMT_IOC_MAGIC 'i'
+#define IAMT_KCS_SEND_MESSAGE_COMMAND \
+ _IOR(IAMT_IOC_MAGIC, 1, struct heci_message_data)
+#define IAMT_KCS_RECEIVE_MESSAGE_COMMAND \
+ _IOW(IAMT_IOC_MAGIC, 2, struct heci_message_data)
+
+
+enum heci_stop_reason_types{
+ DRIVER_STOP_REQUEST = 0x00,
+ DEVICE_D1_ENTRY = 0x01,
+ DEVICE_D2_ENTRY = 0x02,
+ DEVICE_D3_ENTRY = 0x03,
+ SYSTEM_S1_ENTRY = 0x04,
+ SYSTEM_S2_ENTRY = 0x05,
+ SYSTEM_S3_ENTRY = 0x06,
+ SYSTEM_S4_ENTRY = 0x07,
+ SYSTEM_S5_ENTRY = 0x08
+};
+
+enum me_stop_reason_types{
+ FW_UPDATE = 0x00
+};
+
+enum client_connect_status_types{
+ CCS_SUCCESS = 0x00,
+ CCS_NOT_FOUND = 0x01,
+ CCS_ALREADY_STARTED = 0x02,
+ CCS_OUT_OF_RESOURCES = 0x03,
+ CCS_MESSAGE_SMALL = 0x04
+};
+
+enum client_disconnect_status_types{
+ CDS_SUCCESS = 0x00
+};
+
+
+/**
+ * heci interface function prototypes
+ */
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length);
+
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length);
+
+int host_buffer_is_empty(struct iamt_heci_device *dev);
+
+__s32 count_full_read_slots(struct iamt_heci_device *dev);
+
+__s32 count_empty_write_slots(struct iamt_heci_device *dev);
+
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_wd(struct iamt_heci_device *dev);
+
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+#endif /* _HECI_INTERFACE_H_ */
diff --git a/drivers/char/heci/heci_main.c b/drivers/char/heci/heci_main.c
new file mode 100644
index 0000000..3fef71e
--- /dev/null
+++ b/drivers/char/heci/heci_main.c
@@ -0,0 +1,1623 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2007 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/device.h>
+#include <linux/unistd.h>
+#include <linux/uaccess.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+#define HECI_READ_TIMEOUT 45
+
+#define MAX_OPEN_HANDLE_COUNT 253
+/**
+ * heci driver strings
+ */
+char heci_driver_name[] = "heci";
+char heci_driver_string[] = "Intel(R) AMT Management Interface";
+char heci_driver_version[] = DRIVER_VERSION;
+char heci_copyright[] = "Copyright (c) 2003 - 2007 Intel Corporation.";
+
+
+#ifdef HECI_DEBUG
+int heci_debug = 1;
+#else
+int heci_debug; /* initialized to 0 automatically.*/
+#endif
+MODULE_PARM_DESC(heci_debug, "Debug enabled or not");
+module_param(heci_debug, int, 0644);
+
+
+#define LEGACY_DEV_NAME "iamthif"
+#define HECI_DEV_NAME "heci"
+
+/* heci char device for registration */
+static struct cdev heci_cdev = {
+ .kobj = {.name = HECI_DEV_NAME, },
+ .owner = THIS_MODULE,
+};
+
+/* iamt legacy char device for registration */
+static struct cdev iamt_legacy_cdev = {
+ .kobj = {.name = LEGACY_DEV_NAME, },
+ .owner = THIS_MODULE,
+};
+
+/* major number for device */
+static int heci_major;
+/* The device pointer */
+static struct pci_dev *heci_device;
+
+struct class *heci_class;
+struct class_device *iamt_legacy_class_dev;
+struct class_device *heci_class_dev;
+
+
+/* heci_pci_tbl - PCI Device ID Table */
+static struct pci_device_id heci_pci_tbl[] = {
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID01)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID02)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID03)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID04)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID05)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID06)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID07)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID08)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID09)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID10)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID11)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID12)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID13)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID14)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID15)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID16)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID17)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID18)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID19)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID20)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID21)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID22)},
+ /* required last entry */
+ {0, }
+};
+
+MODULE_DEVICE_TABLE(pci, heci_pci_tbl);
+
+/**
+ * Local Function Prototypes
+ */
+static int __init heci_init_module(void);
+static void __exit heci_exit_module(void);
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent);
+static void __devexit heci_remove(struct pci_dev *pdev);
+static int heci_open(struct inode *inode, struct file *file);
+static int heci_release(struct inode *inode, struct file *file);
+static unsigned int heci_legacy_poll(struct file *file, poll_table *wait);
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset);
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data);
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset);
+static unsigned int heci_poll(struct file *file, poll_table *wait);
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state);
+static int heci_resume(struct pci_dev *pdev);
+static __u16 g_sus_wd_timeout;
+#endif
+/**
+ * PCI driver structure
+ */
+static struct pci_driver heci_driver = {
+ .name = heci_driver_name,
+ .id_table = heci_pci_tbl,
+ .probe = heci_probe,
+ .remove = heci_remove,
+ .shutdown = heci_remove,
+#ifdef CONFIG_PM
+ .suspend = heci_suspend,
+ .resume = heci_resume
+#endif
+};
+
+/**
+ * file operations structure will be use heci char device.
+ */
+static struct file_operations heci_fops = {
+ .owner = THIS_MODULE,
+ .read = heci_read,
+ .ioctl = heci_ioctl,
+ .open = heci_open,
+ .release = heci_release,
+ .write = heci_write,
+ .poll = heci_poll,
+};
+
+/**
+ * file operations structure will be use iamt legacy char device.
+ */
+static struct file_operations iamt_legacy_fops = {
+ .owner = THIS_MODULE,
+ .ioctl = heci_ioctl,
+ .open = heci_open,
+ .release = heci_release,
+ .poll = heci_legacy_poll,
+};
+
+
+/**
+ * Set up the cdev structure for heci device.
+ * @dev - char device struct
+ * @hminor - minor number for registration char device
+ * @fops - file operations structure
+ * @return :
+ * 0 on success,
+ * negative on failure
+ */
+static int heci_registration_cdev(struct cdev *dev, int hminor,
+ struct file_operations *fops)
+{
+ int ret = 0, devno = MKDEV(heci_major, hminor);
+
+ cdev_init(dev, fops);
+ dev->owner = THIS_MODULE;
+ dev->ops = fops;
+ ret = cdev_add(dev, devno, 1);
+ /* Fail gracefully if need be */
+ if (ret) {
+ kobject_put(&dev->kobj);
+ printk(KERN_ERR "%s: Error %d registering heci device %d\n",
+ THIS_MODULE->name, ret, hminor);
+ }
+ return ret;
+}
+
+/* Display the version of heci driver. */
+static ssize_t version_show(struct class *dev, char *buf)
+{
+ return sprintf(buf, "%s %s.\n",
+ heci_driver_string, heci_driver_version);
+}
+
+static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
+
+/**
+ * heci_sysfs_create - creates a struct class to contain heci info
+ * @owner - pointer to the module that is to "own" heci sysfs class
+ * @name - pointer to a string for the name of this class
+ *
+ * @return :
+ * valid pointer to a struct class on success
+ * false pointer on failure
+ */
+static struct class *heci_sysfs_create(struct module *owner, char *name)
+{
+ struct class *class;
+ int err = 0;
+
+ class = class_create(owner, name);
+ if (IS_ERR(class)) {
+ err = PTR_ERR(class);
+ goto error;
+ }
+
+ err = class_create_file(class, &class_attr_version);
+ if (err)
+ goto destroy_class;
+
+ return class;
+
+destroy_class:
+ class_destroy(class);
+error:
+ return ERR_PTR(err);
+}
+
+/**
+ * heci_sysfs_destroy - destroys a struct class of heci info
+ * @cs - pointer to the struct class that is to be destroyed
+ *
+ * @return :
+ * none;
+ */
+static void heci_sysfs_destroy(struct class *class)
+{
+ if ((class == NULL) || (IS_ERR(class)))
+ return;
+
+ class_remove_file(class, &class_attr_version);
+ class_destroy(class);
+}
+
+/**
+ * heci_sysfs_device_create - adds two devices to sysfs for chararcter devices
+ * @cs - pointer to the struct class that the device to be registered on
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure
+ */
+static int heci_sysfs_device_create(struct class *cs)
+{
+ int err = 0;
+
+ if ((cs == NULL) || (IS_ERR(cs))) {
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ iamt_legacy_class_dev = class_device_create(cs, NULL,
+ iamt_legacy_cdev.dev,
+ NULL,
+ LEGACY_DEV_NAME);
+ if (IS_ERR(iamt_legacy_class_dev)) {
+ err = PTR_ERR(iamt_legacy_class_dev);
+ goto err_out;
+ }
+
+ heci_class_dev = class_device_create(cs, NULL,
+ heci_cdev.dev,
+ NULL,
+ HECI_DEV_NAME);
+ if (IS_ERR(heci_class_dev)) {
+ class_device_unregister(iamt_legacy_class_dev);
+ err = PTR_ERR(heci_class_dev);
+ }
+
+err_out:
+ return err;
+}
+
+/**
+ * heci_sysfs_device_remove - unregisters the two device entries on sysfs
+ *
+ * @return :
+ * none;
+ */
+static void heci_sysfs_device_remove(void)
+{
+ if (iamt_legacy_class_dev)
+ class_device_unregister(iamt_legacy_class_dev);
+ if (heci_class_dev)
+ class_device_unregister(heci_class_dev);
+}
+
+/**
+ * heci_init_module - Driver Registration Routine
+ *
+ * heci_init_module is the first routine called when the driver is
+ * loaded. All it does is register with the PCI subsystem.
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure
+ */
+static int __init heci_init_module(void)
+{
+ int ret = 0;
+ dev_t dev;
+
+ printk(KERN_INFO "%s: %s - version %s\n",
+ THIS_MODULE->name, heci_driver_string, heci_driver_version);
+ printk(KERN_INFO "%s: %s\n", THIS_MODULE->name, heci_copyright);
+
+ /* init pci module */
+ ret = pci_register_driver(&heci_driver);
+ if (ret < 0)
+ goto end;
+
+ /* registration char devices */
+ ret = alloc_chrdev_region(&dev, 0, MINORS_COUNT, "heci");
+
+ heci_major = MAJOR(dev);
+
+ /* rgisteration in sysfs interface */
+ heci_class = heci_sysfs_create(THIS_MODULE, "heci");
+ if (IS_ERR(heci_class)) {
+ printk(KERN_ERR "HECI: Error creating heci class.\n");
+ ret = PTR_ERR(heci_class);
+ goto unregister;
+ }
+
+ /* Now registration two cdevs. */
+ ret = heci_registration_cdev(&iamt_legacy_cdev, LEGACY_MINOR_NUMBER,
+ &iamt_legacy_fops);
+ if (ret)
+ goto destroy_sysfs;
+
+ ret = heci_registration_cdev(&heci_cdev, HECI_MINOR_NUMBER,
+ &heci_fops);
+ if (ret) {
+ cdev_del(&iamt_legacy_cdev);
+ goto destroy_sysfs;
+ }
+
+ if (heci_sysfs_device_create(heci_class)) {
+ cdev_del(&iamt_legacy_cdev);
+ cdev_del(&heci_cdev);
+ ret = -EAGAIN;
+ goto destroy_sysfs;
+ }
+
+ return ret;
+
+destroy_sysfs:
+ heci_sysfs_destroy(heci_class);
+
+unregister:
+ pci_unregister_driver(&heci_driver);
+ unregister_chrdev_region(MKDEV(heci_major, 0), MINORS_COUNT);
+end:
+ return ret;
+}
+
+module_init(heci_init_module);
+
+
+/**
+ * heci_exit_module - Driver Exit Cleanup Routine
+ *
+ * heci_exit_module is called just before the driver is removed
+ * from memory.
+ *
+ * @return :
+ * none;
+ */
+
+static void __exit heci_exit_module(void)
+{
+ pci_unregister_driver(&heci_driver);
+ /* Now unregister two cdevs. */
+ cdev_del(&iamt_legacy_cdev);
+ cdev_del(&heci_cdev);
+
+ heci_sysfs_device_remove();
+ heci_sysfs_destroy(heci_class);
+ unregister_chrdev_region(MKDEV(heci_major, 0), MINORS_COUNT);
+}
+
+module_exit(heci_exit_module);
+
+
+/**
+ * heci_probe - Device Initialization Routine
+ *
+ * @pdev: PCI device information struct
+ * @ent: entry in kcs_pci_tbl
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure
+ */
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct iamt_heci_device *dev = NULL;
+ int i, err = 0;
+
+ if (heci_device) {
+ err = -EEXIST;
+ goto end;
+ }
+ /* enable pci dev */
+ err = pci_enable_device(pdev);
+ if (err) {
+ printk(KERN_ERR "%s: Failed to enable pci device.\n",
+ THIS_MODULE->name);
+ goto end;
+ }
+ /* set PCI host mastering */
+ pci_set_master(pdev);
+ /* pci request regions for heci driver */
+ err = pci_request_regions(pdev, heci_driver_name);
+ if (err) {
+ printk(KERN_ERR "%s: Failed to get pci regions.\n",
+ THIS_MODULE->name);
+ goto disable_device;
+ }
+ /* allocates and initializes the heci dev structure */
+ dev = init_heci_device(pdev);
+ if (!dev) {
+ err = -ENOMEM;
+ goto release_regions;
+ }
+ /* mapping IO device memory */
+ for (i = BAR_0; i <= BAR_5; i++) {
+ if (pci_resource_len(pdev, i) == 0)
+ continue;
+ if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
+ printk(KERN_ERR "%s: heci has an IO ports.\n",
+ THIS_MODULE->name);
+ goto free_device;
+ } else if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
+ if (dev->mem_base) {
+ printk(KERN_ERR "%s: Too many mem addresses.\n",
+ THIS_MODULE->name);
+ goto free_device;
+ }
+ dev->mem_base = pci_resource_start(pdev, i);
+ dev->mem_length = pci_resource_len(pdev, i);
+ }
+ }
+ if (!dev->mem_base) {
+ printk(KERN_ERR "%s: No address to use.\n", THIS_MODULE->name);
+ err = -ENODEV;
+ goto free_device;
+ }
+ dev->mem_addr = ioremap_nocache(dev->mem_base,
+ dev->mem_length);
+ if (!dev->mem_addr) {
+ printk(KERN_ERR "%s: Remap IO device memory failure.\n",
+ THIS_MODULE->name);
+ err = -ENOMEM;
+ goto free_device;
+ }
+ /* request and enable interrupt */
+ dev->irq = pdev->irq;
+ err = request_irq(dev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, dev);
+ if (err) {
+ printk(KERN_ERR "%s: Request_irq failure. irq = %d \n",
+ THIS_MODULE->name, dev->irq);
+ goto unmap_memory;
+ }
+
+ if (heci_hw_init(dev)) {
+ printk(KERN_ERR "%s: Init hw failure.\n", THIS_MODULE->name);
+ err = -ENODEV;
+ goto release_irq;
+ }
+ init_timer(&dev->wd_timer);
+ heci_initialize_clients(dev);
+ if (dev->heci_state != HECI_ENABLED) {
+ err = -ENODEV;
+ goto release_hw;
+ }
+ spin_lock_bh(&dev->device_lock);
+ heci_device = pdev;
+ pci_set_drvdata(pdev, dev);
+ spin_unlock_bh(&dev->device_lock);
+ if (dev->wd_timeout)
+ mod_timer(&dev->wd_timer, jiffies);
+
+
+#ifdef CONFIG_PM
+ g_sus_wd_timeout = 0;
+#endif
+ printk(KERN_INFO "%s: heci driver initialization successful.\n",
+ THIS_MODULE->name);
+ return 0;
+
+release_hw:
+ /* disable interrupts */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->host_hw_state &= ~H_IE;
+ /* acknowledge interrupt and stop interupts */
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+
+ del_timer_sync(&dev->wd_timer);
+
+
+ flush_scheduled_work();
+
+release_irq:
+ free_irq(pdev->irq, dev);
+unmap_memory:
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+free_device:
+ kfree(dev);
+release_regions:
+ pci_release_regions(pdev);
+disable_device:
+ pci_disable_device(pdev);
+end:
+ printk(KERN_ERR "%s: heci driver initialization failed.\n",
+ THIS_MODULE->name);
+ return err;
+}
+
+/**
+ * heci_remove - Device Removal Routine
+ * @pdev: PCI device information struct
+ *
+ * heci_remove is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.
+ *
+ * @return :
+ * none;
+ */
+static void __devexit heci_remove(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *dev = pci_get_drvdata(pdev);
+ int err = 0;
+
+ if (heci_device != pdev)
+ return;
+
+ del_timer_sync(&dev->wd_timer);
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
+ && dev->wd_timeout) {
+ spin_lock_bh(&dev->device_lock);
+ dev->wd_timeout = 0;
+ dev->wd_due_counter = 0;
+ memcpy(dev->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
+ dev->stop = 1;
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+
+ if (!heci_send_wd(dev))
+ DBG("Send stop WD failed\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+ } else {
+ dev->wd_pending = 1;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ dev->wd_stoped = 0;
+
+ err = wait_event_interruptible_timeout(dev->wait_stop_wd,
+ (dev->wd_stoped), 10 * HZ);
+ if (!dev->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else
+ DBG("stop wd complete.\n");
+
+ }
+
+ heci_device = NULL;
+ if (dev->legacy_file_ext.status == HECI_FILE_CONNECTED) {
+ dev->legacy_file_ext.status = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->legacy_file_ext);
+ }
+ if (dev->wd_file_ext.status == HECI_FILE_CONNECTED) {
+ dev->wd_file_ext.status = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->wd_file_ext);
+ }
+ /* remove entry if already in list */
+ DBG("list del legacy and wd file list.\n");
+ heci_remove_client_from_file_list(dev, dev->wd_file_ext.
+ host_client_id);
+ heci_remove_client_from_file_list(dev,
+ dev->legacy_file_ext.host_client_id);
+ flush_scheduled_work();
+ /* disable interrupts */
+ dev->host_hw_state &= ~H_IE;
+ /* acknowledge interrupt and stop interupts */
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ free_irq(pdev->irq, dev);
+ pci_set_drvdata(pdev, NULL);
+
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+
+ kfree(dev);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+}
+
+/**
+ * heci_clear_list - remove all callbacks associated with file
+ * from heci_cb_list
+ * @file: file informtion struct
+ * @heci_cb_list: callbacks list
+ * heci_clear_list is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * @return :1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_list(struct iamt_heci_device *dev,
+ struct file *file, struct list_head *heci_cb_list)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private*priv_cb_next = NULL;
+ struct file *file_temp = NULL;
+ int rets = 0;
+
+ /* list all list member */
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ heci_cb_list, cb_list) {
+ file_temp = (struct file *)priv_cb_pos->file_object;
+ /* check if list member associated with a file */
+ if (file_temp == file) {
+ /* remove member from the list */
+ list_del(&priv_cb_pos->cb_list);
+ /* check if cb equal to current legacy cb */
+ if (dev->legacy_current_cb == priv_cb_pos) {
+ dev->legacy_current_cb = NULL;
+ /* send flow control to legacy client */
+ heci_send_flow_control(dev,
+ &dev->legacy_file_ext);
+ }
+ /* free all allocated buffers */
+ kfree(priv_cb_pos->request_buffer.data);
+ priv_cb_pos->request_buffer.data = NULL;
+ kfree(priv_cb_pos->response_buffer.data);
+ priv_cb_pos->response_buffer.data = NULL;
+ kfree(priv_cb_pos);
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_clear_lists - remove all callbacks associated with file
+ * @device: dev informtion struct
+ * @file: file informtion struct
+ * heci_clear_lists is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * @return :1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_lists(struct iamt_heci_device *dev, struct file *file)
+{
+ int rets = 0;
+
+ /* remove callbacks associated with a file */
+ heci_clear_list(dev, file, &dev->pthi_cmd_list.heci_cb.cb_list);
+ if (heci_clear_list(dev, file,
+ &dev->pthi_read_complete_list.heci_cb.cb_list))
+ rets = 1;
+
+ heci_clear_list(dev, file, &dev->ctrl_rd_list.heci_cb.cb_list);
+
+ if (heci_clear_list(dev, file, &dev->ctrl_wr_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file,
+ &dev->write_waiting_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file, &dev->write_list.heci_cb.cb_list))
+ rets = 1;
+
+ /* check if legacy_current_cb not NULL */
+ if (dev->legacy_current_cb && (!rets)) {
+ /* check file and legacy current cb association */
+ if (dev->legacy_current_cb->file_object == file) {
+ /* remove cb */
+ kfree(dev->legacy_current_cb->request_buffer.data);
+ dev->legacy_current_cb->request_buffer.data = NULL;
+ kfree(dev->legacy_current_cb->response_buffer.data);
+ dev->legacy_current_cb->response_buffer.data = NULL;
+ kfree(dev->legacy_current_cb);
+ dev->legacy_current_cb = NULL;
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_open - the open function
+ */
+static int heci_open(struct inode *inode, struct file *file)
+{
+ struct heci_file_private *file_ext = NULL;
+ int if_num = MINOR(inode->i_rdev);
+ struct iamt_heci_device *dev = NULL;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if (((if_num != LEGACY_MINOR_NUMBER)
+ && (if_num != HECI_MINOR_NUMBER)) || (!dev))
+ return -ENODEV;
+
+ if (if_num != LEGACY_MINOR_NUMBER) {
+ file_ext = alloc_priv(file);
+ if (!file_ext)
+ return -ENOMEM;
+ } else {
+ file->private_data = (void *) &dev->legacy_file_ext;
+ return 0;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ file_ext = NULL;
+ return -ENODEV;
+ }
+ if (dev->open_handle_count >= MAX_OPEN_HANDLE_COUNT) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ file_ext = NULL;
+ return -ENFILE;
+ };
+ dev->open_handle_count++;
+ list_add_tail(&file_ext->link, &dev->file_list);
+ while ((dev->heci_host_clients[dev->current_host_client_id / 8]
+ & (1 << (dev->current_host_client_id % 8))) != 0) {
+
+ dev->current_host_client_id++; /* allow overflow */
+ DBG("current_host_client_id = %d\n",
+ dev->current_host_client_id);
+ DBG("dev->open_handle_count = %lu\n",
+ dev->open_handle_count);
+ }
+ DBG("current_host_client_id = %d\n", dev->current_host_client_id);
+ file_ext->host_client_id = dev->current_host_client_id;
+ dev->heci_host_clients[file_ext->host_client_id / 8] |=
+ (1 << (file_ext->host_client_id % 8));
+ spin_unlock_bh(&dev->device_lock);
+ spin_lock(&file_ext->file_lock);
+ file_ext->state = HECI_FILE_INITIALIZING;
+
+ file->private_data = file_ext;
+ spin_unlock(&file_ext->file_lock);
+
+ return 0;
+}
+
+/**
+ * heci_release - the release function
+ */
+static int heci_release(struct inode *inode, struct file *file)
+{
+ int rets = 0;
+ int if_num = MINOR(inode->i_rdev);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev = NULL;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if (((if_num != LEGACY_MINOR_NUMBER)
+ && (if_num != HECI_MINOR_NUMBER)) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext != &dev->legacy_file_ext) {
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state == HECI_FILE_CONNECTED) {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ spin_unlock(&file_ext->file_lock);
+ DBG("disconnecting client host client = %d, "
+ "ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+ rets = heci_disconnect_host_client(dev, file_ext);
+ spin_lock(&file_ext->file_lock);
+ }
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_queues(dev, file_ext);
+ DBG("remove client host client = %d, ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ dev->open_handle_count--;
+ heci_remove_client_from_file_list(dev,
+ file_ext->host_client_id);
+ spin_unlock_bh(&dev->device_lock);
+
+ /* free read cb */
+ if (file_ext->read_cb != NULL) {
+ spin_unlock(&file_ext->file_lock);
+ priv_cb = file_ext->read_cb;
+ kfree(priv_cb->response_buffer.data);
+ priv_cb->response_buffer.data = NULL;
+ kfree(priv_cb);
+ priv_cb = NULL;
+
+ file_ext->read_cb = NULL;
+ spin_lock(&file_ext->file_lock);
+ }
+ spin_unlock(&file_ext->file_lock);
+ kfree(file_ext);
+ file->private_data = NULL;
+ } else {
+ spin_lock_bh(&dev->device_lock);
+ if (if_num != LEGACY_MINOR_NUMBER)
+ dev->open_handle_count--;
+
+ if (dev->legacy_file_object == file
+ && dev->legacy_state != HECI_LEGACY_IDLE) {
+ DBG("pthi canceled legacy state %d\n",
+ dev->legacy_state);
+ dev->legacy_canceled = 1;
+ if (dev->legacy_state == HECI_LEGACY_READ_COMPLETE) {
+ DBG("run next pthi legacy cb\n");
+ run_next_legacy_cmd(dev);
+ }
+ }
+
+ if (heci_clear_lists(dev, file))
+ dev->legacy_state = HECI_LEGACY_IDLE;
+
+ spin_unlock_bh(&dev->device_lock);
+ }
+ return rets;
+}
+
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ struct heci_file_private *file_ext_list_temp = NULL;
+
+ if (dev->read_list.status == 0
+ && !list_empty(&dev->read_list.heci_cb.cb_list)) {
+ DBG("remove read_list CB \n");
+ list_for_each_entry_safe(priv_cb_pos,
+ priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+
+ file_ext_list_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (file_ext_list_temp &&
+ heci_fe_same_id(file_ext, file_ext_list_temp))
+ return priv_cb_pos;
+
+ }
+ }
+ return NULL;
+}
+
+/**
+ * heci_read - the read client message function.
+ */
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int i;
+ int rets = 0, err = 0;
+ int if_num = MINOR((file->f_dentry->d_inode->i_rdev));
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev = NULL;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ if (!file_ext)
+ return -ENODEV;
+
+ /* Do not allow to read watchdog client */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_wd_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (file_ext->me_client_id ==
+ dev->me_clients[i].client_id)
+ return -EBADF;
+ }
+ }
+ if (file_ext == &dev->legacy_file_ext) {
+ rets = pthi_read(dev, if_num, file, ubuf, length, offset);
+ goto out;
+ }
+
+ if (file_ext->read_cb && file_ext->read_cb->information > *offset) {
+ priv_cb = file_ext->read_cb;
+ goto copy_buffer;
+ } else if (file_ext->read_cb && file_ext->read_cb->information > 0 &&
+ file_ext->read_cb->information <= *offset) {
+ priv_cb = file_ext->read_cb;
+ rets = 0;
+ goto free;
+ } else if ((!file_ext->read_cb || file_ext->read_cb->information == 0)
+ && *offset > 0) {
+ /*Offset needs to be cleaned for contingous reads*/
+ *offset = 0;
+ rets = 0;
+ goto out;
+ }
+
+ spin_lock(&file_ext->read_io_lock);
+ err = heci_start_read(dev, if_num, file_ext);
+ if (err != 0 && err != -EBUSY) {
+ DBG("heci start read failure with status = %d\n", err);
+ spin_unlock(&file_ext->read_io_lock);
+ rets = err;
+ goto out;
+ }
+ if (HECI_READ_COMPLETE != file_ext->reading_state
+ && !waitqueue_active(&file_ext->rx_wait)) {
+ if (file->f_flags & O_NONBLOCK) {
+ rets = -EAGAIN;
+ spin_unlock(&file_ext->read_io_lock);
+ goto out;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+
+ if (wait_event_interruptible(file_ext->rx_wait,
+ (HECI_READ_COMPLETE == file_ext->reading_state
+ || HECI_FILE_INITIALIZING == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTING == file_ext->state))) {
+ if (signal_pending(current)) {
+ rets = -EINTR;
+ goto out;
+ }
+ return -ERESTARTSYS;
+ }
+
+ if (HECI_FILE_INITIALIZING == file_ext->state ||
+ HECI_FILE_DISCONNECTED == file_ext->state ||
+ HECI_FILE_DISCONNECTING == file_ext->state) {
+ rets = -EBUSY;
+ goto out;
+ }
+ spin_lock(&file_ext->read_io_lock);
+ }
+
+ priv_cb = file_ext->read_cb;
+
+ if (!priv_cb) {
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENODEV;
+ }
+ if (file_ext->reading_state != HECI_READ_COMPLETE) {
+ spin_unlock(&file_ext->read_io_lock);
+ return 0;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+ /* now copy the data to user space */
+copy_buffer:
+ DBG("priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("priv_cb->information - %lu\n",
+ priv_cb->information);
+ if (length == 0 || ubuf == NULL ||
+ *offset > priv_cb->information) {
+ rets = -EMSGSIZE;
+ goto free;
+ }
+
+ /* length is being turncated to PAGE_SIZE, however, */
+ /* information size may be longer */
+ length = (length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset));
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length)) {
+ rets = -EFAULT;
+ goto free;
+ } else {
+ rets = length;
+ *offset += length;
+ if ((unsigned long)*offset < priv_cb->information)
+ goto out;
+ }
+free:
+ spin_lock_bh(&dev->device_lock);
+ priv_cb_pos = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb_pos != NULL)
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ kfree(priv_cb->response_buffer.data);
+ priv_cb->response_buffer.data = NULL;
+ kfree(priv_cb);
+ priv_cb = NULL;
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+out: DBG("end heci read rets= %d\n", rets);
+ return rets;
+}
+
+/**
+ * heci_write - the write function.
+ */
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int rets = 0;
+ __u8 i;
+ int if_num = MINOR((file->f_dentry->d_inode->i_rdev));
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_write_cb = NULL;
+ struct heci_msg_hdr heci_hdr;
+ struct iamt_heci_device *dev = NULL;
+ unsigned long currtime = get_seconds();
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ if (file_ext == &dev->legacy_file_ext) {
+ priv_write_cb = find_pthi_read_list_entry(dev, file, file_ext);
+ if ((priv_write_cb) &&
+ (((currtime - priv_write_cb->read_time) >
+ LEGACY_READ_TIMER) ||
+ (file_ext->reading_state == HECI_READ_COMPLETE))) {
+ (*offset) = 0;
+ list_del(&priv_write_cb->cb_list);
+ kfree(priv_write_cb->request_buffer.data);
+ kfree(priv_write_cb->response_buffer.data);
+ kfree(priv_write_cb);
+ }
+ }
+
+ /* free entry used in read */
+ if (file_ext->reading_state == HECI_READ_COMPLETE) {
+ *offset = 0;
+ priv_write_cb = find_read_list_entry(dev, file_ext);
+ if (priv_write_cb != NULL) {
+ list_del(&priv_write_cb->cb_list);
+ kfree(priv_write_cb->response_buffer.data);
+ priv_write_cb->response_buffer.data = NULL;
+ kfree(priv_write_cb);
+ priv_write_cb = NULL;
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+ }
+ } else if (file_ext->reading_state == HECI_IDLE &&
+ file_ext->read_pending == 0)
+ (*offset) = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ priv_write_cb = kmalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_write_cb)
+ return -ENOMEM;
+
+ spin_lock(&file_ext->file_lock);
+ priv_write_cb->request_buffer.data = NULL;
+ priv_write_cb->response_buffer.data = NULL;
+ priv_write_cb->file_object = file;
+ priv_write_cb->file_private = file_ext;
+ spin_unlock(&file_ext->file_lock);
+ priv_write_cb->request_buffer.data = kmalloc(length, GFP_KERNEL);
+ if (!priv_write_cb->request_buffer.data) {
+ kfree(priv_write_cb);
+ return -ENOMEM;
+ }
+ DBG("length =%d\n", (int) length);
+
+ if (copy_from_user(priv_write_cb->request_buffer.data,
+ ubuf, length)) {
+ rets = -EFAULT;
+ goto fail;
+ }
+ INIT_LIST_HEAD(&priv_write_cb->cb_list);
+ if (file_ext == &dev->legacy_file_ext) {
+ priv_write_cb->response_buffer.data =
+ kmalloc(LEGACY_MTU, GFP_KERNEL);
+ if (!priv_write_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->legacy_file_ext.me_client_id)
+ break;
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients) ||
+ (dev->me_clients[i].client_id !=
+ dev->legacy_file_ext.me_client_id)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ } else if ((length > dev->me_clients[i].props.max_msg_length)
+ || (length <= 0)) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -EMSGSIZE;
+ goto fail;
+ }
+
+
+ priv_write_cb->response_buffer.size = LEGACY_MTU;
+ priv_write_cb->major_file_operations = HECI_IOCTL;
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+ if (dev->legacy_file_ext.state != HECI_FILE_CONNECTED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+
+ if (!list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)
+ || dev->legacy_state != HECI_LEGACY_IDLE) {
+ DBG("pthi_state = %d\n", (int) dev->legacy_state);
+ DBG("add PTHI cb to pthi cmd waiting list\n");
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->pthi_cmd_list.heci_cb.cb_list);
+ rets = length;
+ } else {
+ DBG("call pthi write");
+ rets = pthi_write(dev, priv_write_cb);
+
+ if (rets != 0) {
+ DBG("pthi write failed with status = %d\n",
+ rets);
+ spin_unlock_bh(&dev->device_lock);
+ goto fail;
+ }
+ rets = length;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+ }
+
+ priv_write_cb->major_file_operations = HECI_WRITE;
+ /* make sure information is zero before we start */
+
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+
+ spin_lock(&file_ext->write_io_lock);
+ DBG("host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (file_ext->state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ DBG("host client = %d, is not connected to ME client = %d",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ goto unlock;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ file_ext->me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if (i == dev->num_heci_me_clients) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+ if (length > dev->me_clients[i].props.max_msg_length || length <= 0) {
+ rets = -EINVAL;
+ goto unlock;
+ }
+ priv_write_cb->file_private = file_ext;
+
+ spin_lock_bh(&dev->device_lock);
+ if (flow_ctrl_creds(dev, file_ext) &&
+ dev->host_buffer_is_empty) {
+ spin_unlock_bh(&dev->device_lock);
+ dev->host_buffer_is_empty = 0;
+ if (length > ((((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr))) {
+
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) -
+ sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = length;
+ heci_hdr.msg_complete = 1;
+ }
+ heci_hdr.host_addr = file_ext->host_client_id;
+ heci_hdr.me_addr = file_ext->me_client_id;
+ heci_hdr.reserved = 0;
+ DBG("call heci_write_message header=%08x.\n",
+ *((__u32 *) &heci_hdr));
+ spin_unlock(&file_ext->write_io_lock);
+ /* protect heci low level write */
+ spin_lock_bh(&dev->device_lock);
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *) (priv_write_cb->request_buffer.data),
+ heci_hdr.length)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ kfree(priv_write_cb->request_buffer.data);
+ priv_write_cb->request_buffer.data = NULL;
+ kfree(priv_write_cb);
+ rets = -ENODEV;
+ priv_write_cb->information = 0;
+ return rets;
+ }
+ file_ext->writing_state = HECI_WRITING;
+ priv_write_cb->information = heci_hdr.length;
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, file_ext);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ } else {
+
+ spin_unlock_bh(&dev->device_lock);
+ priv_write_cb->information = 0;
+ file_ext->writing_state = HECI_WRITING;
+ spin_unlock(&file_ext->write_io_lock);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return length;
+
+unlock:
+ spin_unlock(&file_ext->write_io_lock);
+fail:
+ kfree(priv_write_cb->request_buffer.data);
+ priv_write_cb->request_buffer.data = NULL;
+ kfree(priv_write_cb->response_buffer.data);
+ priv_write_cb->response_buffer.data = NULL;
+ kfree(priv_write_cb);
+ return rets;
+
+}
+
+/**
+ * heci_ioctl - the IOCTL function
+ */
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data)
+{
+ int rets = 0;
+ int if_num = MINOR(inode->i_rdev);
+ struct heci_file_private *file_ext = file->private_data;
+ /* in user space */
+ struct heci_message_data *u_msg = (struct heci_message_data *) data;
+ struct heci_message_data k_msg; /* all in kernel on the stack */
+ struct iamt_heci_device *dev = NULL;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if (((if_num != LEGACY_MINOR_NUMBER) && (if_num != HECI_MINOR_NUMBER))
+ || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (dev->heci_state != HECI_ENABLED)
+ return -ENODEV;
+
+ /* first copy from user all data needed */
+ if (copy_from_user(&k_msg, u_msg, sizeof(k_msg))) {
+ DBG("first copy from user all data needed filed\n");
+ return -EFAULT;
+ }
+ DBG("user message size is %d\n", k_msg.size);
+
+ switch (cmd) {
+ case IOCTL_HECI_GET_VERSION:
+ DBG(": IOCTL_HECI_GET_VERSION\n");
+ rets = heci_ioctl_get_version(dev, if_num, u_msg, k_msg,
+ file_ext);
+ break;
+
+ case IOCTL_HECI_CONNECT_CLIENT:
+ DBG(": IOCTL_HECI_CONNECT_CLIENT.\n");
+ rets = heci_ioctl_connect_client(dev, if_num, u_msg, k_msg,
+ file);
+ break;
+
+ case IOCTL_HECI_WD:
+ DBG(": IOCTL_HECI_WD.\n");
+ rets = heci_ioctl_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ case IOCTL_HECI_BYPASS_WD:
+ DBG(": IOCTL_HECI_BYPASS_WD.\n");
+ rets = heci_ioctl_bypass_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ case IAMT_KCS_SEND_MESSAGE_COMMAND:
+ DBG(": IAMT_KCS_SEND_MESSAGE_COMMAND.\n");
+ rets = legacy_ioctl_send_msg(dev, if_num, k_msg, file);
+ break;
+
+ case IAMT_KCS_RECEIVE_MESSAGE_COMMAND:
+ DBG(": IAMT_KCS_RECEIVE_MESSAGE_COMMAND.\n");
+ rets = legacy_ioctl_recv_msg(dev, if_num, u_msg, k_msg, file);
+ break;
+
+ default:
+ rets = -EINVAL;
+ break;
+ }
+ return rets;
+}
+
+/**
+ * heci_legacy_poll - the poll function
+ */
+static unsigned int heci_legacy_poll(struct file *file, poll_table *wait)
+{
+ int if_num = MINOR((file->f_dentry->d_inode->i_rdev));
+ unsigned int mask = 0;
+ struct iamt_heci_device *dev = NULL;
+ struct heci_file_private *file_ext = file->private_data;
+
+ if (!heci_device || !file_ext)
+ return mask;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != LEGACY_MINOR_NUMBER) || (!dev))
+ return mask;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return mask;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ if (file_ext == &dev->legacy_file_ext) {
+ poll_wait(file, &dev->legacy_file_ext.wait, wait);
+ spin_lock(&dev->legacy_file_ext.file_lock);
+ if (dev->legacy_state == HECI_LEGACY_READ_COMPLETE
+ && dev->legacy_file_object == file) {
+ mask |= (POLLIN | POLLRDNORM);
+ spin_lock_bh(&dev->device_lock);
+ DBG("run next pthi legacy cb\n");
+ run_next_legacy_cmd(dev);
+ spin_unlock_bh(&dev->device_lock);
+ }
+ spin_unlock(&dev->legacy_file_ext.file_lock);
+ }
+
+ return mask;
+}
+
+/**
+ * heci_poll - the poll function
+ */
+static unsigned int heci_poll(struct file *file, poll_table *wait)
+{
+ int if_num = MINOR((file->f_dentry->d_inode->i_rdev));
+ unsigned int mask = 0;
+ struct heci_file_private *file_ext = file->private_data;
+ struct iamt_heci_device *dev = NULL;
+
+ if (!heci_device)
+ return mask;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return mask;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return mask;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ if (file_ext == &dev->legacy_file_ext) {
+ poll_wait(file, &dev->legacy_file_ext.wait, wait);
+ spin_lock(&dev->legacy_file_ext.file_lock);
+ if (dev->legacy_state == HECI_LEGACY_READ_COMPLETE
+ && dev->legacy_file_object == file) {
+ mask |= (POLLIN | POLLRDNORM);
+ spin_lock_bh(&dev->device_lock);
+ DBG("run next pthi cb");
+ run_next_legacy_cmd(dev);
+ spin_unlock_bh(&dev->device_lock);
+ }
+ spin_unlock(&dev->legacy_file_ext.file_lock);
+
+ } else{
+ poll_wait(file, &file_ext->tx_wait, wait);
+ spin_lock(&file_ext->write_io_lock);
+ if (HECI_WRITE_COMPLETE == file_ext->writing_state)
+ mask |= (POLLIN | POLLRDNORM);
+
+ spin_unlock(&file_ext->write_io_lock);
+ }
+
+ return mask;
+}
+
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct iamt_heci_device *device = pci_get_drvdata(pdev);
+ int err = 0;
+
+ /* Stop watchdog if exists */
+ del_timer_sync(&device->wd_timer);
+ if (device->wd_file_ext.state == HECI_FILE_CONNECTED
+ && device->wd_timeout) {
+ spin_lock_bh(&device->device_lock);
+ g_sus_wd_timeout = device->wd_timeout;
+ device->wd_timeout = 0;
+ device->wd_due_counter = 0;
+ memcpy(device->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
+ device->stop = 1;
+ if (device->host_buffer_is_empty &&
+ flow_ctrl_creds(device, &device->wd_file_ext)) {
+ device->host_buffer_is_empty = 0;
+ if (!heci_send_wd(device))
+ DBG("Send stop WD failed\n");
+ else
+ flow_ctrl_reduce(device, &device->wd_file_ext);
+
+ device->wd_pending = 0;
+ } else {
+ device->wd_pending = 1;
+ }
+ spin_unlock_bh(&device->device_lock);
+ device->wd_stoped = 0;
+
+ err = wait_event_interruptible_timeout(device->wait_stop_wd,
+ (device->wd_stoped),
+ 10 * HZ);
+ if (!device->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else {
+ DBG("stop wd complete %d.\n", err);
+ err = 0;
+ }
+ }
+ /* Set new heci state */
+ spin_lock_bh(&device->device_lock);
+ if (device->heci_state == HECI_ENABLED ||
+ device->heci_state == HECI_RECOVERING_FROM_RESET) {
+ device->heci_state = HECI_POWER_DOWN;
+ heci_reset(device, 0);
+ }
+ spin_unlock_bh(&device->device_lock);
+
+ pci_save_state(pdev);
+
+ pci_disable_device(pdev);
+ free_irq(pdev->irq, device);
+
+ pci_set_power_state(pdev, PCI_D3hot);
+
+ return err;
+}
+
+static int heci_resume(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *device = NULL;
+ int err = 0;
+
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+
+ device = pci_get_drvdata(pdev);
+ if (!device)
+ return -ENODEV;
+
+ /* request and enable interrupt */
+ device->irq = pdev->irq;
+ err = request_irq(device->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, device);
+ if (err) {
+ printk(KERN_ERR "%s: Request_irq failure. irq = %d \n",
+ THIS_MODULE->name, device->irq);
+ return err;
+ }
+
+ spin_lock_bh(&device->device_lock);
+ device->heci_state = HECI_POWER_UP;
+ heci_reset(device, 1);
+ spin_unlock_bh(&device->device_lock);
+
+ /* Start watchdog if stopped in suspend */
+ if (g_sus_wd_timeout != 0) {
+ device->wd_timeout = g_sus_wd_timeout;
+
+ memcpy(device->wd_data, start_wd_params, HECI_WD_PARAMS_SIZE);
+ memcpy(device->wd_data + HECI_WD_PARAMS_SIZE,
+ &device->wd_timeout, sizeof(__u16));
+ device->wd_due_counter = 1;
+
+ if (device->wd_timeout)
+ mod_timer(&device->wd_timer, jiffies);
+
+ g_sus_wd_timeout = 0;
+ }
+ return err;
+}
+#endif
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) AMT Management Interface");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(DRIVER_VERSION);
diff --git a/drivers/char/heci/heci_version.h b/drivers/char/heci/heci_version.h
new file mode 100644
index 0000000..95a2698
--- /dev/null
+++ b/drivers/char/heci/heci_version.h
@@ -0,0 +1,56 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2006-2007 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef HECI_VERSION_H
+#define HECI_VERSION_H
+
+#define MAJOR_VERSION 3
+#define MINOR_VERSION 1
+#define QUICK_FIX_NUMBER 0
+#define VER_BUILD 38
+
+#define str(s) name(s)
+#define name(s) #s
+#define DRIVER_V1 str(MAJOR_VERSION) "." str(MINOR_VERSION)
+#define DRIVER_V2 str(QUICK_FIX_NUMBER) "." str(VER_BUILD)
+
+#define DRIVER_VERSION DRIVER_V1 "." DRIVER_V2
+
+#endif
diff --git a/drivers/char/heci/interrupt.c b/drivers/char/heci/interrupt.c
new file mode 100644
index 0000000..dfbf58e
--- /dev/null
+++ b/drivers/char/heci/interrupt.c
@@ -0,0 +1,1596 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2006-2007 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/kthread.h>
+#include <linux/uaccess.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+
+/**
+ * interrupt function prototypes
+ */
+static void heci_bh_handler(struct work_struct *work);
+static int heci_bh_read_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static int heci_bh_write_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *connect_res);
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *disconnect_res);
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control);
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req);
+
+
+/**
+ * heci_isr_interrupt - The ISR of the HECI device
+ * @irq: The irq number
+ * @dev_id: pointer to the device structure
+ * @regs: the register values
+ *
+ * @return :
+ * irqreturn_t
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id)
+{
+ int err;
+ struct iamt_heci_device *device = (struct iamt_heci_device *) dev_id;
+ device->host_hw_state = read_heci_register(device, H_CSR);
+
+ if ((device->host_hw_state & H_IS) != H_IS)
+ return IRQ_NONE;
+
+ /* disable interrupts */
+ device->host_hw_state &= ~H_IE;
+ /* acknowledge interrupt and stop interupts */
+ write_heci_register(device, H_CSR, device->host_hw_state);
+ /**
+ * Our device interrupted, schedule work the heci_bh_handler
+ * to handle the interrupt processing. This needs to be a
+ * workqueue item since the handler can sleep.
+ */
+ PREPARE_WORK(&device->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler \n");
+ err = schedule_work(&device->work);
+ if (!err) {
+ printk(KERN_ERR "%s: schedule the heci_bh_handler"
+ " failed error=%x\n", THIS_MODULE->name, err);
+ }
+ return IRQ_HANDLED;
+}
+
+/**
+ * _heci_cmpl: process completed operation.
+ * @priv_cb_pos: callback block.
+ * @file_ext: file extension.
+ *
+ * @return :
+ * none.
+ */
+static void _heci_cmpl(struct heci_file_private *file_ext,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (priv_cb_pos->major_file_operations == HECI_WRITE) {
+ kfree(priv_cb_pos->request_buffer.data);
+ priv_cb_pos->request_buffer.data = NULL;
+ kfree(priv_cb_pos);
+ priv_cb_pos = NULL;
+ DBG("completing write call back.\n");
+ file_ext->writing_state = HECI_WRITE_COMPLETE;
+ if ((&file_ext->tx_wait) &&
+ waitqueue_active(&file_ext->tx_wait))
+ wake_up_interruptible(&file_ext->tx_wait);
+
+ } else if (priv_cb_pos->major_file_operations == HECI_READ
+ && HECI_READING == file_ext->reading_state) {
+ DBG("completing read call back information= %lu\n",
+ priv_cb_pos->information);
+ file_ext->reading_state = HECI_READ_COMPLETE;
+ if ((&file_ext->rx_wait) &&
+ waitqueue_active(&file_ext->rx_wait))
+ wake_up_interruptible(&file_ext->rx_wait);
+
+ }
+}
+
+/**
+ * _heci_cmpl_legacy: process completed legacy operation.
+ * @dev: device object.
+ * @priv_cb_pos: callback block.
+ *
+ * @return :
+ * none.
+ */
+static void _heci_cmpl_legacy(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (dev->legacy_canceled != 1) {
+ dev->legacy_state = HECI_LEGACY_READ_COMPLETE;
+ dev->legacy_stall_timer = 0;
+ memcpy(priv_cb_pos->response_buffer.data,
+ dev->legacy_msg_buf,
+ dev->legacy_msg_buf_index);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->pthi_read_complete_list.heci_cb.cb_list);
+ DBG("pthi read completed\n");
+ } else {
+ run_next_legacy_cmd(dev);
+ }
+ if (&dev->legacy_file_ext.wait) {
+ DBG("completing pthi call back.\n");
+ wake_up_interruptible(&dev->legacy_file_ext.wait);
+ }
+}
+/**
+ * heci_bh_handler - function called after ISR to handle the interrupt
+ * processing.
+ * @data: pointer to the device structure
+ *
+ * NOTE: This function is called by schedule work
+ * @return :
+ * none;
+ */
+static void heci_bh_handler(struct work_struct *work)
+{
+ struct iamt_heci_device *dev =
+ container_of(work, struct iamt_heci_device, work);
+ struct io_heci_list complete_list;
+ __s32 slots;
+ int rets;
+ struct heci_cb_private *cb_pos = NULL, *cb_next = NULL;
+ struct heci_file_private *file_ext = NULL;
+ int bus_message_received = 0;
+ struct task_struct *tsk;
+
+ DBG("function called after ISR to handle the interrupt processing.\n");
+ /* initialize our complete list */
+ spin_lock_bh(&dev->device_lock);
+ heci_initialize_list(&complete_list, dev);
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ /* check if ME wants a reset */
+ if (((dev->me_hw_state & ME_RDY_HRA) == 0)
+ && (dev->heci_state != HECI_RESETING)
+ && (dev->heci_state != HECI_INITIALIZING)) {
+ DBG("FW not ready.\n");
+ heci_reset(dev, 1);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ /* check if we need to start the dev */
+ if ((dev->host_hw_state & H_RDY) == 0) {
+ if ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA) {
+ DBG("we need to start the dev.\n");
+ dev->host_hw_state |= (H_IE | H_IG | H_RDY);
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ if (dev->heci_state == HECI_INITIALIZING) {
+ dev->recvd_msg = 1;
+ spin_unlock_bh(&dev->device_lock);
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ return;
+
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ tsk = kthread_run(heci_initialize_clients,
+ dev, "heci");
+ if (IS_ERR(tsk)) {
+ int rc = PTR_ERR(tsk);
+ printk(KERN_WARNING "heci: Unable to"
+ "start the heci thread: %d\n", rc);
+ }
+ return;
+ }
+ } else {
+ DBG("Enable interrupt FW not ready \n");
+ dev->host_hw_state |= (H_IE);
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ }
+ /* check slots avalable for reading */
+ slots = count_full_read_slots(dev);
+ DBG("slots =%08x extra_write_index =%08x.\n",
+ slots, dev->extra_write_index);
+ while ((slots > 0) && (!dev->extra_write_index)) {
+ DBG("slots =%08x extra_write_index =%08x.\n", slots,
+ dev->extra_write_index);
+ DBG("call heci_bh_read_handler.\n");
+ rets = heci_bh_read_handler(&complete_list, dev, &slots);
+ if (rets != 0)
+ goto end;
+ }
+ rets = heci_bh_write_handler(&complete_list, dev, &slots);
+end:
+ DBG("end of bottom half function.\n");
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ PREPARE_WORK(&dev->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler.\n");
+ rets = schedule_work(&dev->work);
+ if (!rets) {
+ printk(KERN_ERR "%s: schedule the heci_bh_handler"
+ " failed error=%x\n", THIS_MODULE->name, rets);
+ }
+ } else {
+ dev->host_hw_state |= H_IE;
+ }
+
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+
+
+ if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) {
+ DBG("received waiting bus message\n");
+ bus_message_received = 1;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ if (bus_message_received) {
+ DBG("wake up dev->wait_recvd_msg\n");
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ bus_message_received = 0;
+ }
+ if ((complete_list.status != 0)
+ || list_empty(&complete_list.heci_cb.cb_list))
+ return;
+
+
+ list_for_each_entry_safe(cb_pos, cb_next,
+ &complete_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)cb_pos->file_private;
+ list_del(&cb_pos->cb_list);
+ if ((file_ext) && (file_ext != &dev->legacy_file_ext)) {
+ DBG("completing call back.\n");
+ _heci_cmpl(file_ext, cb_pos);
+ cb_pos = NULL;
+ } else if (file_ext == &dev->legacy_file_ext) {
+ _heci_cmpl_legacy(dev, cb_pos);
+ }
+ }
+}
+
+
+/**
+ * heci_bh_read_handler - bottom half read routine after ISR to
+ * handle the read processing.
+ *
+ *
+ * @complete_list - An instance of our list structure
+ * @dev - Device object for our driver
+ * @slots - slots to read.
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+static int heci_bh_read_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+ struct heci_msg_hdr *heci_hdr;
+ int ret = 0;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (!dev->rd_msg_hdr) {
+ dev->rd_msg_hdr = read_heci_register(dev, ME_CB_RW);
+ DBG("slots=%08x.\n", *slots);
+ (*slots)--;
+ DBG("slots=%08x.\n", *slots);
+ }
+ heci_hdr = (struct heci_msg_hdr *) &dev->rd_msg_hdr;
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+
+ if ((heci_hdr->reserved) || !(dev->rd_msg_hdr)) {
+ DBG("corrupted message header.\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+
+ if (heci_hdr->host_addr || heci_hdr->me_addr) {
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe read host"
+ " client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ if ((file_pos->host_client_id == heci_hdr->host_addr)
+ && (file_pos->me_client_id == heci_hdr->me_addr))
+ break;
+ }
+
+ if (&file_pos->link == &dev->file_list) {
+ DBG("corrupted message header\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+ }
+ if (((*slots) * sizeof(__u32)) < heci_hdr->length) {
+ DBG("we can't read the message slots=%08x.\n", *slots);
+ /* we can't read the message */
+ ret = -ERANGE;
+ goto end;
+ }
+
+ /* decide where to read the message too */
+ if (!heci_hdr->host_addr) {
+ DBG("call heci_bh_read_bus_message.\n");
+ heci_bh_read_bus_message(dev, heci_hdr);
+ DBG("end heci_bh_read_bus_message.\n");
+ } else if (heci_hdr->host_addr == dev->legacy_file_ext.host_client_id
+ && HECI_FILE_CONNECTED == dev->legacy_file_ext.state
+ && dev->legacy_state == HECI_LEGACY_READING) {
+ DBG("call heci_bh_read_legacy_message.\n");
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ ret = heci_bh_read_pthi_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ } else {
+ DBG("call heci_bh_read_client_message.\n");
+ ret = heci_bh_read_client_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ }
+
+ /* reset the number of slots and header */
+ *slots = count_full_read_slots(dev);
+ dev->rd_msg_hdr = 0;
+
+ if (*slots == -ESLOTS_OVERFLOW) {
+ /* overflow - reset */
+ DBG("reseting due to slots overflow\n");
+ /* set the event since message has been read */
+ ret = -ERANGE;
+ goto end;
+ }
+end:
+ return ret;
+}
+
+
+/**
+ * heci_bh_read_bus_message - bottom half read routine after ISR to
+ * handle the read bus message cmd processing.
+ *
+ * @complete_list - An instance of our list structure
+ * @dev - Device object for our driver
+ * @buffer - message buffer will be filled
+ * @heci_hdr - header of bus message
+ *
+ * @return :
+ * none;
+ */
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_bus_message *heci_msg;
+ struct hbm_host_version_response *version_res;
+ struct hbm_client_connect_response *connect_res;
+ struct hbm_client_connect_response *disconnect_res;
+ struct hbm_flow_control *flow_control;
+ struct hbm_props_response *props_res;
+ struct hbm_host_enum_response *enum_res;
+ struct hbm_client_disconnect_request *disconnect_req;
+ struct hbm_host_stop_request *h_stop_req;
+ int i;
+ unsigned char *buffer;
+
+ buffer = NULL;
+ /* read the message to our buffer */
+ buffer = (unsigned char *) dev->rd_msg_buf;
+ BUG_ON(heci_hdr->length >= sizeof(dev->rd_msg_buf));
+ heci_read_slots(dev, buffer, heci_hdr->length);
+ heci_msg = (struct heci_bus_message *) buffer;
+
+ switch (*(__u8 *) heci_msg) {
+ case HOST_START_RES_CMD:
+ version_res = (struct hbm_host_version_response *) heci_msg;
+ if (version_res->host_version_supported) {
+ dev->version.major_version = HBM_MAJOR_VERSION;
+ dev->version.minor_version = HBM_MINOR_VERSION;
+ } else {
+ dev->version = version_res->me_max_version;
+ }
+ dev->recvd_msg = 1;
+ DBG("host start response message received.\n");
+ break;
+
+ case CLIENT_CONNECT_RES_CMD:
+ connect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_connect_response(dev, connect_res);
+ DBG("client connect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case CLIENT_DISCONNECT_RES_CMD:
+ disconnect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_disconnect_response(dev, disconnect_res);
+ DBG("client disconnect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case FLOW_CONTROL_CMD:
+ flow_control = (struct hbm_flow_control *) heci_msg;
+ heci_client_flow_control_response(dev, flow_control);
+ DBG("client flow control response message received.\n");
+ break;
+ case HOST_CLIENT_PROPERTEIS_RES_CMD:
+ props_res = (struct hbm_props_response *) heci_msg;
+ if (props_res->status != 0) {
+ BUG_ON(1);
+ break;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ props_res->address) {
+ dev->me_clients[i].props =
+ props_res->client_properties;
+ break;
+ }
+
+ }
+ dev->recvd_msg = 1;
+ break;
+ case HOST_ENUM_RES_CMD:
+ enum_res = (struct hbm_host_enum_response *) heci_msg;
+ memcpy(dev->heci_me_clients, enum_res->valid_addresses, 32);
+ dev->recvd_msg = 1;
+ break;
+ case HOST_STOP_RES_CMD:
+ dev->heci_state = HECI_DISABLED;
+ DBG("Reseting becase of FW stop response\n");
+ heci_reset(dev, 1);
+ break;
+ case CLIENT_DISCONNECT_REQ_CMD:
+ /* search for client */
+ disconnect_req =
+ (struct hbm_client_disconnect_request *) heci_msg;
+ heci_client_disconnect_request(dev, disconnect_req);
+ break;
+ case ME_STOP_REQ_CMD:
+ /* prepare stop request */
+ heci_hdr = (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ h_stop_req =
+ (struct hbm_host_stop_request *) &dev->ext_msg_buf[1];
+ memset(h_stop_req, 0, sizeof(struct hbm_host_stop_request));
+ h_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ h_stop_req->reason = DRIVER_STOP_REQUEST;
+ h_stop_req->reserved[0] = 0;
+ h_stop_req->reserved[1] = 0;
+ dev->extra_write_index = 2;
+ break;
+
+ default:
+ BUG_ON(1);
+ break;
+
+ }
+}
+
+/**
+ * heci_bh_read_legacy_message - bottom half read routine after ISR to
+ * handle the read legacy message data processing.
+ *
+ * @complete_list - An instance of our list structure
+ * @dev - Device object for our driver
+ * @buffer - message buffer will be filled
+ * @heci_hdr - header of legacy message
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext = NULL;
+ struct heci_cb_private *priv_cb = NULL;
+ int rets = 0;
+ unsigned char *buffer = NULL;
+
+ BUG_ON(heci_hdr->me_addr != dev->legacy_file_ext.me_client_id);
+ BUG_ON(dev->legacy_state != HECI_LEGACY_READING);
+
+ buffer = (unsigned char *) (dev->legacy_msg_buf +
+ dev->legacy_msg_buf_index);
+ BUG_ON(sizeof(dev->legacy_msg_buf) <
+ (dev->legacy_msg_buf_index + heci_hdr->length));
+
+ heci_read_slots(dev, buffer, heci_hdr->length);
+
+ dev->legacy_msg_buf_index += heci_hdr->length;
+
+ if (heci_hdr->msg_complete) {
+ DBG("pthi_message_buffer_index=%d\n", heci_hdr->length);
+ DBG("completed pthi read.\n ");
+ if (!dev->legacy_current_cb)
+ return -ENODEV;
+ priv_cb = dev->legacy_current_cb;
+ dev->legacy_current_cb = NULL;
+ file_ext = (struct heci_file_private *)priv_cb->file_private;
+ if (!file_ext)
+ return -ENODEV;
+ dev->legacy_stall_timer = 0;
+ priv_cb->information = dev->legacy_msg_buf_index;
+ priv_cb->read_time = get_seconds();
+ if (dev->legacy_ioctl && file_ext == &dev->legacy_file_ext) {
+ /* found the legacy cb */
+ DBG("complete the pthi read cb.\n ");
+ if (&dev->legacy_file_ext) {
+ DBG("add the pthi read cb to complete.\n ");
+ list_add_tail(&priv_cb->cb_list,
+ &complete_list->heci_cb.cb_list);
+ }
+ }
+ }
+ return rets;
+}
+
+static int _heci_bh_state_ok(struct heci_file_private *file_ext,
+ struct heci_msg_hdr *heci_hdr)
+{
+ return ((file_ext->host_client_id == heci_hdr->host_addr)
+ && (file_ext->me_client_id == heci_hdr->me_addr)
+ && (file_ext->state == HECI_FILE_CONNECTED)
+ && (HECI_READ_COMPLETE != file_ext->reading_state));
+}
+
+/**
+ * heci_bh_read_client_message - bottom half read routine after ISR to
+ * handle the read heci client message data processing.
+ *
+ * @complete_list - An instance of our list structure
+ * @dev - Device object for our driver
+ * @buffer - message buffer will be filled
+ * @heci_hdr - header of heci client message
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ unsigned char *buffer = NULL;
+
+ DBG("Start client msg \n");
+ if (!((dev->read_list.status == 0) &&
+ !list_empty(&dev->read_list.heci_cb.cb_list)))
+ goto quit;
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (_heci_bh_state_ok(file_ext, heci_hdr)) {
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_READING;
+ buffer = (unsigned char *)
+ (priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information);
+ BUG_ON(priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information);
+
+ if (priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information) {
+ DBG(" message overflow.\n");
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENOMEM;
+ }
+ if (buffer) {
+ heci_read_slots(dev, buffer,
+ heci_hdr->length);
+ }
+ priv_cb_pos->information += heci_hdr->length;
+ if (heci_hdr->msg_complete) {
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ DBG("completed read host client = %d,"
+ "ME client = %d, "
+ "data length = %lu\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id,
+ priv_cb_pos->information);
+
+ *(priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information) = '\0';
+ DBG("priv_cb_pos->res_buffer - %s\n",
+ priv_cb_pos->response_buffer.data);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &complete_list->heci_cb.cb_list);
+ } else {
+ spin_unlock(&file_ext->read_io_lock);
+ }
+
+ break;
+ }
+
+ }
+
+quit:
+ DBG("Message read\n");
+ if (!buffer) {
+ heci_read_slots(dev, (unsigned char *) dev->rd_msg_buf,
+ heci_hdr->length);
+ DBG("discarding message, header=%08x.\n",
+ *(__u32 *) dev->rd_msg_buf);
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_legacy_read: prepare to read legacy data.
+ * @dev: device object.
+ * @slots: free slotsl.
+ * @return :
+ * 0, OK; otherwise, error.
+ */
+static int _heci_bh_legacy_read(struct iamt_heci_device *dev, __s32 *slots)
+{
+
+ if (((*slots) * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr)
+ + sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, &dev->legacy_file_ext)) {
+ DBG("legacy flow control failed\n");
+ } else {
+ DBG("legacy flow control success\n");
+ dev->legacy_state = HECI_LEGACY_READING;
+ dev->legacy_flow_control_pending = 0;
+ dev->legacy_msg_buf_index = 0;
+ dev->legacy_msg_buf_size = 0;
+ dev->legacy_stall_timer = LEGACY_STALL_TIMER;
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+ }
+ return 0;
+ } else {
+ return -ECOMPLETE_MESSAGE;
+ }
+}
+
+/**
+ * _heci_bh_close: process close related operation.
+ * @dev: device object.
+ * @slots: free slotsl.
+ * @priv_cb_pos: callback block.
+ * @file_ext: file extension.
+ * @cmpl_list: complete list.
+ *
+ * @return :
+ * 0, OK; otherwise, error.
+ */
+static int _heci_bh_close(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request) + 3) / 4;
+
+ if (!heci_disconnect(dev, file_ext)) {
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_del(&priv_cb_pos->cb_list);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_del(&priv_cb_pos->cb_list);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_hb_close: process read related operation.
+ * @dev: device object.
+ * @slots: free slotsl.
+ * @priv_cb_pos: callback block.
+ * @file_ext: file extension.
+ * @cmpl_list: complete list.
+ *
+ * @return :
+ * 0, OK; otherwise, error.
+ */
+static int _heci_bh_read(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_del(&priv_cb_pos->cb_list);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ list_del(&priv_cb_pos->cb_list);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+
+/**
+ * _heci_bh_ioctl: process ioctl related operation.
+ * @dev: device object.
+ * @slots: free slotsl.
+ * @priv_cb_pos: callback block.
+ * @file_ext: file extension.
+ * @cmpl_list: complete list.
+ *
+ * @return :
+ * 0, OK; otherwise, error.
+ */
+static int _heci_bh_ioctl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request))) {
+ file_ext->state = HECI_FILE_CONNECTING;
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request) + 3) / 4;
+ if (!heci_connect(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ list_del(&priv_cb_pos->cb_list);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl: process completed and no-legacy operation.
+ * @dev: device object.
+ * @slots: free slotsl.
+ * @priv_cb_pos: callback block.
+ * @file_ext: file extension.
+ * @cmpl_list: complete list.
+ *
+ * @return :
+ * 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr = NULL;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ (priv_cb_pos->request_buffer.size -
+ priv_cb_pos->information))) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = ((priv_cb_pos->request_buffer.size) -
+ (priv_cb_pos->information));
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ "heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n",
+ heci_hdr->length);
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ file_ext->status = 0;
+ priv_cb_pos->information += heci_hdr->length;
+ list_del(&priv_cb_pos->cb_list);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ (*slots) -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ priv_cb_pos->information += heci_hdr->length;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ " heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl_legacy: process completed legacy operation.
+ * @dev: device object.
+ * @slots: free slotsl.
+ * @priv_cb_pos: callback block.
+ * @file_ext: file extension.
+ * @cmpl_list: complete list.
+ *
+ * @return :
+ * 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl_legacy(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr = NULL;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ dev->legacy_msg_buf_size -
+ dev->legacy_msg_buf_index)) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = dev->legacy_msg_buf_size -
+ dev->legacy_msg_buf_index;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->legacy_msg_buf +
+ dev->legacy_msg_buf_index),
+ heci_hdr->length)) {
+ dev->legacy_state = HECI_LEGACY_IDLE;
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ dev->legacy_msg_buf_index += heci_hdr->length;
+ list_del(&priv_cb_pos->cb_list);
+ priv_cb_pos->information = dev->legacy_msg_buf_index;
+ file_ext->status = 0;
+ dev->legacy_state = HECI_LEGACY_FLOW_CONTROL;
+ dev->legacy_flow_control_pending = 1;
+ /* save legacy cb sent to pthi client */
+ dev->legacy_current_cb = priv_cb_pos;
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->legacy_msg_buf +
+ dev->legacy_msg_buf_index),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ } else {
+ dev->legacy_msg_buf_index += heci_hdr->length;
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * heci_bh_write_handler - bottom half write routine after
+ * ISR to handle the write processing.
+ *
+ * @complete_list - An instance of our list structure
+ * @dev - Device object for our driver
+ * @slots - slots to write.
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+static int heci_bh_write_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+
+ struct heci_file_private *file_ext = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ struct io_heci_list *list;
+ int ret;
+
+ if (!host_buffer_is_empty(dev)) {
+ DBG("host buffer is not empty.\n");
+ return 0;
+ }
+ dev->write_hang = -1;
+ *slots = count_empty_write_slots(dev);
+ /* complete all waiting for write CB */
+ DBG("complete all waiting for write CB.\n");
+
+ list = &dev->write_waiting_list;
+ if (list->status == 0
+ && !list_empty(&list->heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &list->heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ if (HECI_WRITING == file_ext->writing_state &&
+ (priv_cb_pos->major_file_operations ==
+ HECI_WRITING) &&
+ file_ext != &dev->legacy_file_ext) {
+ DBG("HECI WRITE COMPLETE\n");
+ file_ext->writing_state = HECI_WRITE_COMPLETE;
+ list_add_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ }
+ if (file_ext == &dev->legacy_file_ext) {
+ DBG("check legacy flow control\n");
+ if (dev->legacy_flow_control_pending) {
+ ret = _heci_bh_legacy_read(dev, slots);
+ if (ret != 0)
+ return ret;
+ }
+ }
+
+ }
+ }
+
+ if (dev->stop && !dev->wd_pending) {
+ dev->wd_stoped = 1;
+ wake_up_interruptible(&dev->wait_stop_wd);
+ return 0;
+ }
+
+ if (dev->extra_write_index != 0) {
+ DBG("extra_write_index =%d\n", dev->extra_write_index);
+ heci_write_message(dev,
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0],
+ (unsigned char *) &dev->ext_msg_buf[1],
+ (dev->extra_write_index - 1) * sizeof(__u32));
+ *slots -= dev->extra_write_index;
+ dev->extra_write_index = 0;
+ }
+ if (dev->heci_state == HECI_ENABLED) {
+ if (dev->wd_pending
+ && flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ if (!heci_send_wd(dev))
+ DBG("Wd send failed\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+
+ if (dev->wd_timeout != 0) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_START_WD_DATA_SIZE + 3) / 4;
+ dev->wd_due_counter = 2;
+ } else {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_WD_PARAMS_SIZE + 3) / 4;
+ dev->wd_due_counter = 0;
+ }
+
+ }
+ }
+ if (dev->stop)
+ return ~ENODEV;
+
+ /* complete control write list CB */
+ if (dev->ctrl_wr_list.status == 0) {
+ /* complete control write list CB */
+ DBG("complete control write list CB\n ");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_wr_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (!file_ext) {
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ }
+ switch (priv_cb_pos->major_file_operations) {
+ case HECI_CLOSE:
+ /* send disconnect message */
+ ret = _heci_bh_close(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_READ:
+ /* send flow control message */
+ ret = _heci_bh_read(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_IOCTL:
+ /* connect message */
+ if (!other_client_is_connecting(dev, file_ext))
+ continue;
+ ret = _heci_bh_ioctl(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+
+ default:
+ BUG_ON(1);
+ }
+
+ }
+ }
+ /* complete write list CB */
+ if (dev->write_list.status == 0
+ && !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ DBG("complete write list CB \n");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext != NULL) &&
+ (file_ext != &dev->legacy_file_ext)) {
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control credentials"
+ "for client %d, not sending\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ } else if (file_ext == &dev->legacy_file_ext) {
+ /* LEGACY IOCTL */
+ DBG("complete pthi write cb\n");
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control credentials"
+ "for pthi client %d\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl_legacy(dev, slots,
+ priv_cb_pos,
+ file_ext,
+ cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ }
+
+ }
+ }
+ return 0;
+}
+
+
+/**
+ * is_treat_specially_client - check if the message belong
+ * to the file extension .
+ * @file_ext -extension of the file object
+ * @connect_res -connect response bus message
+ * @dev -Device object for our driver
+ *
+ * @return :
+ * 1 if empty
+ * 0 - otherwise.
+ */
+static int is_treat_specially_client(struct heci_file_private *file_ext,
+ struct hbm_client_connect_response *rs)
+{
+ int ret = 0;
+
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+ if (rs->status == 0) {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_CONNECTED;
+ file_ext->status = 0;
+ } else {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_DISCONNECTED;
+ file_ext->status = -ENODEV;
+ }
+ ret = 1;
+ }
+ DBG("client state = %d.\n", file_ext->state);
+ return ret;
+}
+
+/**
+ * heci_client_connect_response - connect response bh routine
+ *
+ * @dev -Device object for our driver
+ * @connect_res -connect response bus message
+ * @complete_list - An instance of our list structure
+ *
+ * @return :
+ * none;
+ */
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+
+ struct heci_file_private *file_ext = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ /* if WD or legacy client treat specially */
+
+ if ((is_treat_specially_client(&(dev->wd_file_ext), rs)) ||
+ (is_treat_specially_client(&(dev->legacy_file_ext), rs)))
+ return;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (!file_ext) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+ if (HECI_IOCTL == priv_cb_pos->major_file_operations) {
+ if (is_treat_specially_client(file_ext, rs)) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+ }
+}
+
+/**
+ * heci_client_disconnect_response - disconnect response bh routine
+ *
+ * @dev -Device object for our driver
+ * @disconnect_res -disconnect response bus message
+ * @complete_list - An instance of our list structure
+ *
+ * @return :
+ * none;
+ */
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+ struct heci_file_private *file_ext = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (!file_ext) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+
+ DBG("list_for_each_entry_safe in ctrl_rd_list.\n");
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+
+ list_del(&priv_cb_pos->cb_list);
+ if (rs->status == 0) {
+ file_ext->state =
+ HECI_FILE_DISCONNECTED;
+ }
+
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_flow_addr: tell they have same address.
+ * @file: file extension.
+ * @flow: flow control.
+ * @return :
+ * 1, same; 0,not.
+ */
+static int same_flow_addr(struct heci_file_private *file,
+ struct hbm_flow_control *flow)
+{
+ if ((file->host_client_id == flow->host_addr)
+ && (file->me_client_id == flow->me_addr))
+ return 1;
+
+ return 0;
+}
+
+/**
+ * add_single_flow_creds: add single buffer credentials.
+ * @file: file extension.
+ * @flow: flow control.
+ * @return :
+ * none.
+ */
+static void add_single_flow_creds(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow)
+{
+ struct heci_me_client *client = NULL;
+ int i;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ client = &dev->me_clients[i];
+ if (flow->me_addr == client->client_id) {
+ if (client->props.single_recv_buf != 0) {
+ client->flow_ctrl_creds++;
+ DBG("rece flow ctrl msg ME %d (single).\n",
+ flow->me_addr);
+ DBG("flow control credentials=%d.\n",
+ client->flow_ctrl_creds);
+ } else {
+ BUG_ON(1); /* error in flow control */
+ }
+ }
+ }
+}
+/**
+ * heci_client_flow_control_response - flow control response bh routine
+ *
+ * @dev -Device object for our driver
+ * @flow_control -flow control response bus message
+ *
+ * @return :
+ * none;
+ */
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (flow_control->host_addr == 0) {
+ /* single receive buffer */
+ add_single_flow_creds(dev, flow_control);
+ } else {
+ /* normal connection */
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe in file_list\n");
+
+ DBG("file_ext of host client %d ME client %d.\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ DBG("flow ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ if (same_flow_addr(file_pos, flow_control)) {
+ DBG("recv ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ file_pos->flow_ctrl_creds++;
+ DBG("flow control credentials=%d.\n",
+ file_pos->flow_ctrl_creds);
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_disconn_addr: tell they have same address
+ * @file: file extension
+ * @disconn: disconnection request.
+ * @return :
+ * 1, same; 0,not.
+ */
+static int same_disconn_addr(struct heci_file_private *file,
+ struct hbm_client_disconnect_request *disconn)
+{
+ if ((file->host_client_id == disconn->host_addr)
+ && (file->me_client_id == disconn->me_addr))
+ return 1;
+
+ return 0;
+}
+
+/**
+ * heci_client_disconnect_request - disconnect request bh routine
+ *
+ * @dev -Device object for our driver
+ * @disconnect_req -disconnect request bus message
+ *
+ * @return :
+ * none;
+ */
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_response *disconnect_res;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (same_disconn_addr(file_pos, disconnect_req)) {
+ DBG("disconn request host client %d ME client %d.\n",
+ disconnect_req->host_addr,
+ disconnect_req->me_addr);
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->timer_count = 0;
+ if (file_pos == &dev->wd_file_ext) {
+ dev->wd_due_counter = 0;
+ dev->wd_pending = 0;
+ } else if (file_pos == &dev->legacy_file_ext)
+ dev->legacy_timer = 0;
+
+ /* prepare disconnect response */
+ heci_hdr =
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length =
+ sizeof(struct hbm_client_connect_response);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ disconnect_res =
+ (struct hbm_client_connect_response *)
+ &dev->ext_msg_buf[1];
+ disconnect_res->host_addr = file_pos->host_client_id;
+ disconnect_res->me_addr = file_pos->me_client_id;
+ *(__u8 *) (&disconnect_res->cmd) =
+ CLIENT_DISCONNECT_RES_CMD;
+ disconnect_res->status = 0;
+ dev->extra_write_index = 2;
+ break;
+ }
+ }
+}
+
+
+/**
+ * free_legacy: free legacy related memory
+ * @dev: heci device
+ *
+ * @return :
+ * none;
+ */
+static void free_legacy(struct iamt_heci_device *dev)
+{
+ kfree(dev->legacy_current_cb->request_buffer.data);
+ dev->legacy_current_cb->request_buffer.data = NULL;
+ kfree(dev->legacy_current_cb->response_buffer.data);
+ dev->legacy_current_cb->response_buffer.data = NULL;
+ kfree(dev->legacy_current_cb);
+}
+
+/**
+ * heci_timer - timer function .
+ * @data: pointer to the device structure
+ *
+ * NOTE: This function is called by timer interrupt work
+ * @return :
+ * none;
+ */
+void heci_wd_timer(unsigned long data)
+{
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ DBG("send watchdog.\n");
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ /*** Watchdog ***/
+ if ((dev->wd_due_counter != 0) && (dev->wd_bypass == 0)) {
+ if (--dev->wd_due_counter == 0) {
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_wd(dev)) {
+ DBG("Wd send failed\n");
+ } else {
+ flow_ctrl_reduce(dev,
+ &dev->wd_file_ext);
+ }
+
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 2;
+ else
+ dev->wd_due_counter = 0;
+
+ } else
+ dev->wd_pending = 1;
+
+ }
+ }
+ if (dev->legacy_stall_timer != 0) {
+ if (--dev->legacy_stall_timer == 0) {
+ DBG("Reseting because of hang to PTHI\n");
+ heci_reset(dev, 1);
+ dev->legacy_msg_buf_size = 0;
+ dev->legacy_msg_buf_index = 0;
+ dev->legacy_canceled = 0;
+ dev->legacy_ioctl = 1;
+ dev->legacy_state = HECI_LEGACY_IDLE;
+ dev->legacy_timer = 0;
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->legacy_current_cb)
+ free_legacy(dev);
+
+ spin_lock_bh(&dev->device_lock);
+ dev->legacy_file_object = NULL;
+ dev->legacy_current_cb = NULL;
+ run_next_legacy_cmd(dev);
+ }
+ }
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+}
diff --git a/drivers/char/heci/io_heci.c b/drivers/char/heci/io_heci.c
new file mode 100644
index 0000000..3ff13dd
--- /dev/null
+++ b/drivers/char/heci/io_heci.c
@@ -0,0 +1,1138 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2007 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/list.h>
+#include <linux/unistd.h>
+#include <linux/delay.h>
+#include <linux/uaccess.h>
+
+#include "heci_data_structures.h"
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+/**
+ * heci_ioctl_get_version - the get driver version IOCTL function
+ * @dev -Device object for our driver
+ * @if_num minor number
+ * @*u_msg pointer to user data struct in user space
+ * @k_msg data in kernel on the stack
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+
+ int rets = 0;
+ struct heci_driver_version *version;
+ struct heci_message_data res_msg;
+ res_msg.data = NULL;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev)
+ || (!file_ext))
+ return -ENODEV;
+
+ if (k_msg.size < (sizeof(struct heci_driver_version) - 2)) {
+ DBG("user buffer less than heci_driver_version.\n");
+ return -EMSGSIZE;
+ }
+
+ res_msg.data = kmalloc(sizeof(struct heci_driver_version), GFP_KERNEL);
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_driver_version));
+ return -ENOMEM;
+ }
+
+ version = (struct heci_driver_version *) res_msg.data;
+ version->major = MAJOR_VERSION;
+ version->minor = MINOR_VERSION;
+ version->hotfix = QUICK_FIX_NUMBER;
+ if (k_msg.size < sizeof(struct heci_driver_version)) {
+ res_msg.size = sizeof(struct heci_driver_version) - 2;
+ } else {
+ version->build = VER_BUILD;
+ res_msg.size = sizeof(struct heci_driver_version);
+ }
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+end:
+ kfree(res_msg.data);
+ return rets;
+}
+
+/**
+ * heci_ioctl_connect_client - the connect to fw client IOCTL function
+ * @dev -Device object for our driver
+ * @if_num minor number
+ * @*u_msg pointer to user data struct in user space
+ * @k_msg data in kernel on the stack
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file)
+{
+
+ int rets = 0;
+ struct heci_message_data req_msg, res_msg;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_client *client;
+ struct heci_file_private *file_ext = NULL;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ struct heci_file_private *file_ext_temp = NULL;
+
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ long timeout = 15; /*15 second */
+ __u8 i;
+ int err = 0;
+ res_msg.data = NULL;
+ req_msg.data = NULL;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file))
+ return -ENODEV;
+
+ file_ext = file->private_data;
+ if (!file_ext)
+ return -ENODEV;
+
+ if (k_msg.size != sizeof(struct guid)) {
+ DBG("user buffer size is not equal to size of struct "
+ "guid(16).\n");
+ return -EMSGSIZE;
+ }
+
+ req_msg.data = kmalloc(sizeof(struct guid), GFP_KERNEL);
+ res_msg.data = kmalloc(sizeof(struct heci_client), GFP_KERNEL);
+
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_client));
+ kfree(req_msg.data);
+ req_msg.data = NULL;
+ return -ENOMEM;
+ }
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ (int) sizeof(struct guid));
+ kfree(res_msg.data);
+ res_msg.data = NULL;
+ return -ENOMEM;
+ }
+ req_msg.size = sizeof(struct guid);
+ res_msg.size = sizeof(struct heci_client);
+ if (!k_msg.data) {
+ rets = -EIO;
+ goto end;
+ }
+
+ /* copy the message to kernel space -
+ * use a pointer already copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, k_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ /* buffered ioctl cb */
+ priv_cb = kmalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb) {
+ rets = -ENOMEM;
+ goto end;
+ }
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->response_buffer.data = res_msg.data;
+ priv_cb->response_buffer.size = res_msg.size;
+ priv_cb->request_buffer.data = req_msg.data;
+ priv_cb->request_buffer.size = req_msg.size;
+ priv_cb->major_file_operations = HECI_IOCTL;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if ((file_ext->state != HECI_FILE_INITIALIZING) &&
+ (file_ext->state != HECI_FILE_DISCONNECTED)) {
+ rets = -EBUSY;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ /* find ME client we're trying to connect to */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp((struct guid *)req_msg.data,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (dev->me_clients[i].props.fixed_address == 0) {
+ file_ext->me_client_id =
+ dev->me_clients[i].client_id;
+ file_ext->state = HECI_FILE_CONNECTING;
+ }
+ break;
+ }
+ }
+ /* if we're connecting to PTHI client so we will use the exist
+ * connection
+ */
+ if (memcmp((struct guid *)req_msg.data, &heci_pthi_guid,
+ sizeof(struct guid)) == 0) {
+ if (dev->legacy_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ if (heci_fe_same_id(file_ext, file_pos)) {
+ DBG("remove file extension node host"
+ " client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del(&file_pos->link);
+ }
+
+ }
+ DBG("free file extension memory\n");
+ kfree(file_ext);
+ file_ext = NULL;
+ file->private_data = &dev->legacy_file_ext;
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length =
+ dev->me_clients[i].props.max_msg_length;
+ client->protocol_version =
+ dev->me_clients[i].props.protocol_version;
+ rets = dev->legacy_file_ext.status;
+ spin_unlock_bh(&dev->device_lock);
+
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ }
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state != HECI_FILE_CONNECTING) {
+ rets = -ENODEV;
+ spin_unlock(&file_ext->file_lock);
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ spin_unlock(&file_ext->file_lock);
+ /* prepare the output buffer */
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length = dev->me_clients[i].props.max_msg_length;
+ client->protocol_version = dev->me_clients[i].props.protocol_version;
+ if (dev->host_buffer_is_empty
+ && !other_client_is_connecting(dev, file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_connect(dev, file_ext)) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ } else {
+ file_ext->timer_count = CONNECT_TIMEOUT;
+ priv_cb->file_private = file_ext;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.
+ cb_list);
+ }
+
+
+ } else {
+ priv_cb->file_private = file_ext;
+ DBG("add connect cb to control write list\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+
+ if (HECI_FILE_CONNECTED == file_ext->state) {
+ DBG("successfully to connect to FW client.\n");
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ } else {
+ DBG("failed to connect to FW client.file_ext->state = %d\n",
+ file_ext->state);
+ if (!err) {
+ DBG("wait_event_interruptible_timeout failed on client"
+ " connect message fw response message\n");
+ }
+ rets = -EFAULT;
+ goto remove_list;
+ }
+
+remove_list:
+ if (priv_cb) {
+ spin_lock_bh(&dev->device_lock);
+ if (dev->ctrl_rd_list.status == 0 &&
+ !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext_temp =
+ (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext_temp) {
+ if (heci_fe_same_id(file_ext,
+ file_ext_temp))
+ list_del(&priv_cb_pos->cb_list);
+
+ }
+
+ }
+ }
+ if (dev->ctrl_wr_list.status == 0 &&
+ !list_empty(&dev->ctrl_wr_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_wr_list.heci_cb.cb_list, cb_list) {
+ file_ext_temp =
+ (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext_temp) {
+ if (heci_fe_same_id(file_ext,
+ file_ext_temp))
+ list_del(&priv_cb_pos->cb_list);
+
+ }
+
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+ }
+end:
+ DBG("free connect cb memory");
+ kfree(req_msg.data);
+ req_msg.data = NULL;
+ kfree(res_msg.data);
+ res_msg.data = NULL;
+ kfree(priv_cb);
+ priv_cb = NULL;
+ return rets;
+}
+
+/**
+ * heci_ioctl_wd - the wd IOCTL function
+ * @dev -Device object for our driver
+ * @if_num minor number
+ * @k_msg data in kernel on the stack
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+int heci_ioctl_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ struct heci_message_data req_msg; /*in kernel on the stack */
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size != HECI_WATCHDOG_DATA_SIZE) {
+ DBG("User buffer has invalid size.\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+
+ req_msg.data = kmalloc(HECI_WATCHDOG_DATA_SIZE, GFP_KERNEL);
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ HECI_WATCHDOG_DATA_SIZE);
+ return -ENOMEM;
+ }
+ req_msg.size = HECI_WATCHDOG_DATA_SIZE;
+
+ /* copy the message to kernel space - use a pointer already
+ * copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, req_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if (!dev->asf_mode) {
+ rets = -EIO;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ memcpy(&dev->wd_data[HECI_WD_PARAMS_SIZE], req_msg.data,
+ HECI_WATCHDOG_DATA_SIZE);
+
+ dev->wd_timeout = (req_msg.data[1] << 8) + req_msg.data[0];
+ if (dev->wd_timeout == 0) {
+ memcpy(dev->wd_data, &stop_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ dev->wd_pending = 0;
+ dev->wd_due_counter = 1; /* next timer */
+ } else {
+ memcpy(dev->wd_data, &start_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ dev->wd_pending = 0;
+ dev->wd_due_counter = 1;
+ mod_timer(&dev->wd_timer, jiffies);
+ }
+ spin_unlock_bh(&dev->device_lock);
+end:
+ kfree(req_msg.data);
+ req_msg.data = NULL;
+ return rets;
+}
+
+
+/**
+ * heci_ioctl_bypass_wd - the bypass_wd IOCTL function
+ * @dev -Device object for our driver
+ * @if_num minor number
+ * @k_msg data in kernel on the stack
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+int heci_ioctl_bypass_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ __u8 flag = 0;
+ int rets = 0;
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size < 1) {
+ DBG("user buffer less than HECI_WATCHDOG_DATA_SIZE .\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+ if (copy_from_user(&flag, k_msg.data, 1)) {
+ rets = -EFAULT;
+ goto end;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ flag = flag ?(1):(0);
+ dev->wd_bypass = flag;
+ spin_unlock_bh(&dev->device_lock);
+end:
+ return rets;
+}
+
+
+/**
+ * legacy_ioctl_send_msg - send cmd data to pthi client
+ * @dev -Device object for our driver
+ * @if_num minor number
+ * @*u_msg pointer to user data struct in user space
+ * @k_msg data in kernel on the stack
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+int legacy_ioctl_send_msg(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct file *file)
+{
+
+ int rets = 0;
+ struct heci_message_data req_msg, res_msg; /*in kernel on the stack */
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_file_private *file_ext = file->private_data;
+ __u8 i;
+ req_msg.data = NULL;
+ res_msg.data = NULL;
+
+ if ((if_num != LEGACY_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ if (!file_ext)
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->legacy_file_ext.me_client_id)
+ break;
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients) ||
+ (dev->me_clients[i].client_id
+ != dev->legacy_file_ext.me_client_id)) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ } else if ((k_msg.size > dev->me_clients[i].props.max_msg_length)
+ || (k_msg.size <= 0)) {
+ spin_unlock_bh(&dev->device_lock);
+ return -EMSGSIZE;
+ }
+
+
+ spin_unlock_bh(&dev->device_lock);
+ req_msg.data = kmalloc(k_msg.size, GFP_KERNEL);
+ res_msg.data = kmalloc(LEGACY_MTU, GFP_KERNEL);
+
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_client));
+ kfree(req_msg.data);
+ req_msg.data = NULL;
+ return -ENOMEM;
+ }
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ (int) sizeof(struct guid));
+ kfree(res_msg.data);
+ res_msg.data = NULL;
+ return -ENOMEM;
+ }
+ req_msg.size = k_msg.size;
+ res_msg.size = LEGACY_MTU;
+ if (!k_msg.data) {
+ rets = -EIO;
+ goto end;
+ }
+
+ /* copy the message to kernel space - use a pointer already
+ * copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, k_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ /* buffered ioctl cb */
+ priv_cb = kmalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb) {
+ rets = -ENOMEM;
+ goto end;
+ }
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+
+ priv_cb->request_buffer.data = req_msg.data;
+ priv_cb->request_buffer.size = req_msg.size;
+ priv_cb->response_buffer.data = res_msg.data;
+ priv_cb->response_buffer.size = res_msg.size;
+ priv_cb->major_file_operations = HECI_IOCTL;
+ priv_cb->information = 0;
+ priv_cb->file_object = file;
+ priv_cb->file_private = file_ext;
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if (dev->legacy_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+
+ if (!list_empty(&dev->pthi_cmd_list.heci_cb.cb_list) ||
+ (dev->legacy_state != HECI_LEGACY_IDLE)) {
+ DBG("pthi_state = %d\n", (int) dev->legacy_state);
+ DBG("add PTHI cb to pthi cmd waiting list");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->pthi_cmd_list.heci_cb.cb_list);
+
+ } else {
+ DBG("call pthi write\n");
+ rets = pthi_write(dev, priv_cb);
+
+ if (rets != 0) {
+ DBG("pthi write failed with status = %d\n", rets);
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+end:
+ kfree(req_msg.data);
+ req_msg.data = NULL;
+ kfree(res_msg.data);
+ res_msg.data = NULL;
+ kfree(priv_cb);
+ priv_cb = NULL;
+ return rets;
+}
+
+
+/**
+ * legacy_ioctl_recv_msg - receive cmd data from pthi client
+ * @dev -Device object for our driver
+ * @if_num minor number
+ * @*u_msg pointer to user data struct in user space
+ * @k_msg data in kernel on the stack
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+int legacy_ioctl_recv_msg(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file)
+{
+ int rets = 0;
+ struct heci_message_data req_msg, res_msg;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_file_private *file_ext = file->private_data;
+ __u8 i;
+ struct heci_file_private *file_ext_list_temp = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ res_msg.data = NULL;
+ req_msg.data = NULL;
+
+ if ((if_num != LEGACY_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (!file_ext) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->legacy_file_ext.me_client_id)
+ break;
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients)
+ || (dev->me_clients[i].client_id
+ != dev->legacy_file_ext.me_client_id)) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+
+ if (dev->pthi_read_complete_list.status == 0) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_read_complete_list.heci_cb.cb_list, cb_list) {
+ file_ext_list_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext_list_temp) {
+ if ((file_ext == &dev->legacy_file_ext) &&
+ (priv_cb_pos->file_object == file)) {
+ list_del(&priv_cb_pos->cb_list);
+ priv_cb = priv_cb_pos;
+ break;
+ }
+ }
+
+ }
+ }
+ if (!priv_cb) {
+ spin_unlock_bh(&dev->device_lock);
+ return -EAGAIN;
+ }
+
+
+ res_msg.data = priv_cb->response_buffer.data;
+ res_msg.size = priv_cb->response_buffer.size;
+ req_msg.data = priv_cb->request_buffer.data;
+ req_msg.size = priv_cb->request_buffer.size;
+ DBG("pthi priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("pthi priv_cb->information - %lu\n",
+ priv_cb->information);
+ spin_unlock_bh(&dev->device_lock);
+
+ if (res_msg.size < priv_cb->information) {
+ rets = -EMSGSIZE;
+ goto end;
+ }
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, priv_cb->information)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(priv_cb->information, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+end:
+ kfree(req_msg.data);
+ kfree(res_msg.data);
+ kfree(priv_cb);
+ return rets;
+}
+
+/**
+ * find_pthi_read_list_entry - finds a PTHIlist entry for current file
+ * @dev -Device object for our driver
+ *
+ * @return :
+ * returned a list entry on success,
+ * NULL on failure.
+ */
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct file *file,
+ struct heci_file_private *file_ext)
+{
+ struct heci_file_private *file_ext_temp = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if (dev->pthi_read_complete_list.status == 0 &&
+ !list_empty(&dev->pthi_read_complete_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_read_complete_list.heci_cb.cb_list, cb_list) {
+ file_ext_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext_temp) {
+ if ((file_ext == &dev->legacy_file_ext) &&
+ (priv_cb_pos->file_object == file))
+ return priv_cb_pos;
+
+ }
+ }
+ }
+ return NULL;
+}
+/**
+ * pthi_read - read data from pthi client
+ * @dev -Device object for our driver
+ * @if_num minor number
+ * @*u_msg pointer to user data in user space
+ * @length-user data length
+ *
+ * @return :
+ * returned data length on success,
+ * zero if no data to read,
+ * negative on failure.
+ */
+int pthi_read(struct iamt_heci_device *dev, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset)
+{
+
+ int rets = 0;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_file_private *file_ext = file->private_data;
+ __u8 i;
+ unsigned long currtime = get_seconds();
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ if (!file_ext)
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->legacy_file_ext.me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients)
+ || (dev->me_clients[i].client_id !=
+ dev->legacy_file_ext.me_client_id)) {
+ DBG("PTHI client not found\n");
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ priv_cb = find_pthi_read_list_entry(dev, file, file_ext);
+ if (!priv_cb) {
+ spin_unlock_bh(&dev->device_lock);
+ return 0; /* No more data to read */
+ } else {
+ if (priv_cb &&
+ (currtime - priv_cb->read_time > LEGACY_READ_TIMER)) {
+ /* 15 sec for the message has expired */
+ list_del(&priv_cb->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ETIMEDOUT;
+ goto free;
+ }
+ /* if the whole message will fit remove it from the list */
+ if ((priv_cb->information >= *offset) &&
+ (length >= (priv_cb->information - *offset)))
+ list_del(&priv_cb->cb_list);
+ else if ((priv_cb->information > 0) &&
+ (priv_cb->information <= *offset)) {
+ /* end of the message has been reached */
+ list_del(&priv_cb->cb_list);
+ rets = 0;
+ spin_unlock_bh(&dev->device_lock);
+ goto free;
+ }
+ /* else means that not full buffer will be read and do not
+ * remove message from deletion list
+ */
+ }
+ DBG("pthi priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("pthi priv_cb->information - %lu\n",
+ priv_cb->information);
+ spin_unlock_bh(&dev->device_lock);
+
+ /* length is being turncated to PAGE_SIZE, however,
+ * the information may be longer */
+ length = length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset);
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length))
+ rets = -EFAULT;
+ else {
+ rets = length;
+ if ((*offset + length) < priv_cb->information) {
+ *offset += length;
+ goto out;
+ }
+ }
+ DBG("free pthi cb memory\n");
+free:
+ *offset = 0;
+ kfree(priv_cb->request_buffer.data);
+ kfree(priv_cb->response_buffer.data);
+ kfree(priv_cb);
+out:
+ return rets;
+}
+
+/**
+ * heci_start_read - the start read client message function.
+ * @dev -Device object for our driver
+ * @if_num minor number
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+int heci_start_read(struct iamt_heci_device *dev, int if_num,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ __u8 i;
+ struct heci_cb_private *priv_cb = NULL;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext)) {
+ DBG("receive wrong function input param\n.");
+ return -ENODEV;
+ }
+ if (file_ext->state != HECI_FILE_CONNECTED)
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ DBG("check if read is pending\n");
+ if ((file_ext->read_pending) || (file_ext->read_cb != NULL)) {
+ DBG("read is pending");
+ return -EBUSY;
+ }
+ priv_cb = kmalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ DBG("allocation call back success\n");
+ DBG("host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id)
+ break;
+
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients)) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+
+ priv_cb->response_buffer.size = dev->me_clients[i].props.max_msg_length;
+ spin_unlock_bh(&dev->device_lock);
+ priv_cb->response_buffer.data =
+ kmalloc(priv_cb->response_buffer.size, GFP_KERNEL);
+ if (!priv_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ DBG("allocation call back data success\n");
+ priv_cb->major_file_operations = HECI_READ;
+ /* make sure information is zero before we start */
+ priv_cb->information = 0;
+ priv_cb->file_private = (void *) file_ext;
+ file_ext->read_cb = priv_cb;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ rets = -ENODEV;
+ goto unlock;
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+unlock:
+ spin_unlock_bh(&dev->device_lock);
+fail:
+ kfree(priv_cb->response_buffer.data);
+ priv_cb->response_buffer.data = NULL;
+ priv_cb->file_private = NULL;
+ kfree(priv_cb);
+ return rets;
+}
+
+/**
+ * pthi_write - write legacy data to pthi client
+ * @dev -Device object for our driver
+ * @priv_cb - heci call back struct
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+int pthi_write(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb)
+{
+ int rets = 0;
+ struct heci_msg_hdr heci_hdr;
+
+ if ((!dev) || (!priv_cb))
+ return -ENODEV;
+
+ DBG("write data to pthi client\n");
+
+ dev->legacy_state = HECI_LEGACY_WRITING;
+ dev->legacy_current_cb = priv_cb;
+ dev->legacy_file_object = priv_cb->file_object;
+ dev->legacy_canceled = 0;
+ dev->legacy_ioctl = 1;
+ dev->legacy_msg_buf_size = priv_cb->request_buffer.size;
+ memcpy(dev->legacy_msg_buf, priv_cb->request_buffer.data,
+ priv_cb->request_buffer.size);
+
+ if (flow_ctrl_creds(dev, &dev->legacy_file_ext) &&
+ dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (priv_cb->request_buffer.size >
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr)) {
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = priv_cb->request_buffer.size;
+ heci_hdr.msg_complete = 1;
+ }
+
+ heci_hdr.host_addr = dev->legacy_file_ext.host_client_id;
+ heci_hdr.me_addr = dev->legacy_file_ext.me_client_id;
+ heci_hdr.reserved = 0;
+ dev->legacy_msg_buf_index += heci_hdr.length;
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *) (dev->legacy_msg_buf),
+ heci_hdr.length))
+ return -ENODEV;
+
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, &dev->legacy_file_ext);
+ dev->legacy_flow_control_pending = 1;
+ dev->legacy_state = HECI_LEGACY_FLOW_CONTROL;
+ DBG("add pthi cb to write waiting list\n");
+ dev->legacy_current_cb = priv_cb;
+ dev->legacy_file_object = priv_cb->file_object;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ DBG("message does not complete, "
+ "so add pthi cb to write list\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ } else {
+ if (!(dev->host_buffer_is_empty))
+ DBG("host buffer is not empty");
+
+ DBG("No flow control credentials, "
+ "so add legacy cb to write list\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return rets;
+}
+
+/**
+ * legacy_ioctl_send_msg - send cmd data to pthi client
+ * @dev -Device object for our driver
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+void run_next_legacy_cmd(struct iamt_heci_device *dev)
+{
+ struct heci_file_private *file_ext_tmp = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int status = 0;
+
+ if (!dev)
+ return;
+
+ dev->legacy_msg_buf_size = 0;
+ dev->legacy_msg_buf_index = 0;
+ dev->legacy_canceled = 0;
+ dev->legacy_ioctl = 1;
+ dev->legacy_state = HECI_LEGACY_IDLE;
+ dev->legacy_timer = 0;
+ dev->legacy_file_object = NULL;
+
+ if (dev->pthi_cmd_list.status == 0 &&
+ !list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)) {
+ DBG("complete pthi cmd_list CB\n ");
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_cmd_list.heci_cb.cb_list, cb_list) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext_tmp) &&
+ (file_ext_tmp == &dev->legacy_file_ext)) {
+ status = pthi_write(dev, priv_cb_pos);
+ if (status != 0) {
+ DBG("pthi write failed status = %d\n",
+ status);
+ return;
+ }
+ break;
+ }
+ }
+ }
+}
^ permalink raw reply related [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2007-12-11 17:32 [PATCH] Intel Management Engine Interface Anas Nashif
@ 2007-12-11 18:14 ` Andi Kleen
2007-12-11 18:38 ` Anas Nashif
2007-12-12 8:48 ` Alexander E. Patrakov
1 sibling, 1 reply; 42+ messages in thread
From: Andi Kleen @ 2007-12-11 18:14 UTC (permalink / raw)
To: Anas Nashif; +Cc: linux-kernel, Andrew Morton
Anas Nashif <nashif@linux.intel.com> writes:
>
> The Intel Management Engine Interface (aka HECI: Host Embedded
> Controller Interface ) enables communication between the host OS and
> the Management Engine firmware. MEI is bi-directional, and either the
> host or Intel AMT firmware can initiate transactions.
Can you please expand a bit on who on the host OS would actually communicate
with the management engine? It looks like this driver just exports
an interface to user space. What user space would use it and for
what?
I would be definitely interested in a way to save oops information
away using this. I remember you had a demo for this, is support
for that coming soon?
-Andi
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2007-12-11 18:14 ` Andi Kleen
@ 2007-12-11 18:38 ` Anas Nashif
2007-12-11 18:53 ` Andi Kleen
0 siblings, 1 reply; 42+ messages in thread
From: Anas Nashif @ 2007-12-11 18:38 UTC (permalink / raw)
To: Andi Kleen; +Cc: linux-kernel
There are different ways you can connect to the Firmware and it all depends on
the ME subsystem you want to communicate with.
For Intel AMT, you would use LMS (Local Manageability Service) which acts as a
proxy for SOAP messages coming for management applications. LMS is available via
http://openamt.org/wiki/LocalManageabilityService.
The demo we had for storing kernel oops messages in the firmware used the AMT
1.0 interface (legacy) which allowed direct access to 3PDS using the MEI driver
interfaces. In AMT 3.0 (current platforms) this has been disabled and only SOAP
is possible which is why in the demo we changed the ME firmware to use AMT 1.0.
To have a feel for all of this, with many examples, samples and documentation
you can download the AMT 3.0 SDK (google: intel amt sdk).
Anas
Andi Kleen wrote:
> Anas Nashif <nashif@linux.intel.com> writes:
>> The Intel Management Engine Interface (aka HECI: Host Embedded
>> Controller Interface ) enables communication between the host OS and
>> the Management Engine firmware. MEI is bi-directional, and either the
>> host or Intel AMT firmware can initiate transactions.
>
> Can you please expand a bit on who on the host OS would actually communicate
> with the management engine? It looks like this driver just exports
> an interface to user space. What user space would use it and for
> what?
>
> I would be definitely interested in a way to save oops information
> away using this. I remember you had a demo for this, is support
> for that coming soon?
>
> -Andi
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2007-12-11 18:38 ` Anas Nashif
@ 2007-12-11 18:53 ` Andi Kleen
2007-12-11 19:02 ` David Miller
2007-12-11 19:06 ` Anas Nashif
0 siblings, 2 replies; 42+ messages in thread
From: Andi Kleen @ 2007-12-11 18:53 UTC (permalink / raw)
To: Anas Nashif; +Cc: Andi Kleen, linux-kernel
On Tue, Dec 11, 2007 at 01:38:10PM -0500, Anas Nashif wrote:
> There are different ways you can connect to the Firmware and it all depends on
> the ME subsystem you want to communicate with.
> For Intel AMT, you would use LMS (Local Manageability Service) which acts as a
> proxy for SOAP messages coming for management applications. LMS is available via
> http://openamt.org/wiki/LocalManageabilityService.
>
> The demo we had for storing kernel oops messages in the firmware used the AMT
> 1.0 interface (legacy) which allowed direct access to 3PDS using the MEI driver
> interfaces. In AMT 3.0 (current platforms) this has been disabled and only SOAP
> is possible which is why in the demo we changed the ME firmware to use AMT 1.0.
Ok but saving oops is such a useful facility that we'll probably need
to think about implementing SOAP in the kernel. Before everybody complains
that I went crazy: I suspect with some simplifying assumptions it could
be made relatively straight forward code. In particular if one assumes
no packets get lost then it would be possible to strip down TCP greatly
(so it doesn't need to be much more complicated than netconsole)
and I suspect a very minimal SOAP parser just for this application would
be also possible.
> To have a feel for all of this, with many examples, samples and documentation
> you can download the AMT 3.0 SDK (google: intel amt sdk).
I would be more interested right now how the kernel can use this without
additional user space support. Any ideas on this?
-Andi
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2007-12-11 18:53 ` Andi Kleen
@ 2007-12-11 19:02 ` David Miller
2007-12-11 19:47 ` Andi Kleen
2007-12-11 19:06 ` Anas Nashif
1 sibling, 1 reply; 42+ messages in thread
From: David Miller @ 2007-12-11 19:02 UTC (permalink / raw)
To: andi; +Cc: nashif, linux-kernel
From: Andi Kleen <andi@firstfloor.org>
Date: Tue, 11 Dec 2007 19:53:17 +0100
> Ok but saving oops is such a useful facility that we'll probably
> need to think about implementing SOAP in the kernel.
Ummm, no.
UDP is stateless, a stripped down copy of TCP we simply
do not need. We also do not need XML in the kernel either.
If they want to support things like this they should do it in the
firmware of the management entity like every other sane server
platform does these days.
The console and OOPS messages should go over an extremely resilient
transport which is as simple as possible which usually means shared
memory or I/O memory with some simple handshake or doorbell. This
gets it to the management entity board or whatever, and how it gets
from there to the remote system is it's business not that of the
kernel.
Not TCP, and definitely not this XML SOAP crap.
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2007-12-11 18:53 ` Andi Kleen
2007-12-11 19:02 ` David Miller
@ 2007-12-11 19:06 ` Anas Nashif
2007-12-11 19:48 ` Andi Kleen
2007-12-12 15:00 ` Mark Lord
1 sibling, 2 replies; 42+ messages in thread
From: Anas Nashif @ 2007-12-11 19:06 UTC (permalink / raw)
To: Andi Kleen; +Cc: linux-kernel
Andi Kleen wrote:
> On Tue, Dec 11, 2007 at 01:38:10PM -0500, Anas Nashif wrote:
>> There are different ways you can connect to the Firmware and it all depends on
>> the ME subsystem you want to communicate with.
>> For Intel AMT, you would use LMS (Local Manageability Service) which acts as a
>> proxy for SOAP messages coming for management applications. LMS is available via
>> http://openamt.org/wiki/LocalManageabilityService.
>>
>> The demo we had for storing kernel oops messages in the firmware used the AMT
>> 1.0 interface (legacy) which allowed direct access to 3PDS using the MEI driver
>> interfaces. In AMT 3.0 (current platforms) this has been disabled and only SOAP
>> is possible which is why in the demo we changed the ME firmware to use AMT 1.0.
>
> Ok but saving oops is such a useful facility that we'll probably need
> to think about implementing SOAP in the kernel. Before everybody complains
> that I went crazy: I suspect with some simplifying assumptions it could
> be made relatively straight forward code. In particular if one assumes
> no packets get lost then it would be possible to strip down TCP greatly
> (so it doesn't need to be much more complicated than netconsole)
> and I suspect a very minimal SOAP parser just for this application would
> be also possible.
Actually no TCP/IP is needed here. Basically the MEI driver writes and reads the
messages to/from the firmware. When communicating in-band using LMS, TCP/IP
terminates at LMS and the messages are copied using MEI driver.
>
>> To have a feel for all of this, with many examples, samples and documentation
>> you can download the AMT 3.0 SDK (google: intel amt sdk).
>
> I would be more interested right now how the kernel can use this without
> additional user space support. Any ideas on this?
I will dig for some documents on that.
Anas
>
> -Andi
>
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2007-12-11 19:02 ` David Miller
@ 2007-12-11 19:47 ` Andi Kleen
0 siblings, 0 replies; 42+ messages in thread
From: Andi Kleen @ 2007-12-11 19:47 UTC (permalink / raw)
To: David Miller; +Cc: andi, nashif, linux-kernel
On Tue, Dec 11, 2007 at 11:02:02AM -0800, David Miller wrote:
> From: Andi Kleen <andi@firstfloor.org>
> Date: Tue, 11 Dec 2007 19:53:17 +0100
>
> > Ok but saving oops is such a useful facility that we'll probably
> > need to think about implementing SOAP in the kernel.
>
> Ummm, no.
>
> UDP is stateless, a stripped down copy of TCP we simply
UDP? Anyways it turns out TCP is not even needed.
> do not need. We also do not need XML in the kernel either.
Even if it means you can get users to submit clear logged oopses out
of many machines who hung silently before?
Sure most of the XML infrastructure that tends to be used in
user space is pure bloat. But if you don't want universal
interoperability and just for specific applications
you'll essentially just have a few hardcoded strings that
you'll write down some firmware interface and then a simple
parser to read the results. Again that wouldn't be a generic
XML parser, but just something tailored to the specific job.
I doubt it would be much worse code-wise than some of the more
bizarre /proc ASCII interfaces.
> If they want to support things like this they should do it in the
> firmware of the management entity like every other sane server
> platform does these days.
They do -- the problem is that you need SOAP to talk the firmware.
After reboot the user space can get it out of the firmware again.
> The console and OOPS messages should go over an extremely resilient
> transport which is as simple as possible which usually means shared
> memory or I/O memory with some simple handshake or doorbell. This
With soap it would be a slightly more complicated handshake
and a few hard coded text strings around the actual information.
While that's not pretty if the result is worth it (and I think
general oops logging would be worth a lot of things) that's not too
bad.
-Andi
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2007-12-11 19:06 ` Anas Nashif
@ 2007-12-11 19:48 ` Andi Kleen
2007-12-12 15:00 ` Mark Lord
1 sibling, 0 replies; 42+ messages in thread
From: Andi Kleen @ 2007-12-11 19:48 UTC (permalink / raw)
To: Anas Nashif; +Cc: Andi Kleen, linux-kernel
> Actually no TCP/IP is needed here. Basically the MEI driver writes and reads the
> messages to/from the firmware. When communicating in-band using LMS, TCP/IP
> terminates at LMS and the messages are copied using MEI driver.
Ah that's good to know. I suspect the SOAP interchange could be stripped
down a lot to make it reasonably simple; ideally with all strings just hardcoded
somewhere. Would much parsing be needed?
-Andi
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2007-12-11 17:32 [PATCH] Intel Management Engine Interface Anas Nashif
2007-12-11 18:14 ` Andi Kleen
@ 2007-12-12 8:48 ` Alexander E. Patrakov
1 sibling, 0 replies; 42+ messages in thread
From: Alexander E. Patrakov @ 2007-12-12 8:48 UTC (permalink / raw)
To: Anas Nashif; +Cc: linux-kernel, Andrew Morton, andi, davem
Anas Nashif wrote:
> The Intel Management Engine Interface (aka HECI: Host Embedded
> Controller Interface ) enables communication between the host OS and
> the Management Engine firmware. MEI is bi-directional, and either the
> host or Intel AMT firmware can initiate transactions.
There is a little problem: the driver doesn't work at all with the "64-bit
kernel and 32-bit userspace" combination.
ioctl32(lms:7759): Unknown cmd fd(0) cmd(c0084800){t:'H';sz:8} arg(ffdfea44) on
/dev/heci
Could you please fix it?
--
Alexander E. Patrakov
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2007-12-11 19:06 ` Anas Nashif
2007-12-11 19:48 ` Andi Kleen
@ 2007-12-12 15:00 ` Mark Lord
2007-12-12 16:17 ` Andi Kleen
1 sibling, 1 reply; 42+ messages in thread
From: Mark Lord @ 2007-12-12 15:00 UTC (permalink / raw)
To: Anas Nashif; +Cc: Andi Kleen, linux-kernel
Anas Nashif wrote:
>
> Actually no TCP/IP is needed here. Basically the MEI driver writes and reads the
> messages to/from the firmware. When communicating in-band using LMS, TCP/IP
> terminates at LMS and the messages are copied using MEI driver.
>
>>> To have a feel for all of this, with many examples, samples and documentation
>>> you can download the AMT 3.0 SDK (google: intel amt sdk).
>> I would be more interested right now how the kernel can use this without
>> additional user space support. Any ideas on this?
>
> I will dig for some documents on that.
..
Sample code for storing a trace_back() would be much better.
-ml
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2007-12-12 15:00 ` Mark Lord
@ 2007-12-12 16:17 ` Andi Kleen
0 siblings, 0 replies; 42+ messages in thread
From: Andi Kleen @ 2007-12-12 16:17 UTC (permalink / raw)
To: Mark Lord; +Cc: Anas Nashif, Andi Kleen, linux-kernel
On Wed, Dec 12, 2007 at 10:00:24AM -0500, Mark Lord wrote:
> Anas Nashif wrote:
> >
> >Actually no TCP/IP is needed here. Basically the MEI driver writes and
> >reads the
> >messages to/from the firmware. When communicating in-band using LMS, TCP/IP
> >terminates at LMS and the messages are copied using MEI driver.
> >
> >>>To have a feel for all of this, with many examples, samples and
> >>>documentation
> >>>you can download the AMT 3.0 SDK (google: intel amt sdk).
> >>I would be more interested right now how the kernel can use this without
> >>additional user space support. Any ideas on this?
> >
> >I will dig for some documents on that.
> ..
>
> Sample code for storing a trace_back() would be much better.
Better just a patch that handles all oopses or perhaps better
all printk output (meconsole?)
-Andi
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-08-13 19:48 ` Marcin Obara
@ 2008-08-14 0:23 ` Greg KH
0 siblings, 0 replies; 42+ messages in thread
From: Greg KH @ 2008-08-14 0:23 UTC (permalink / raw)
To: Marcin Obara; +Cc: linux-kernel
On Wed, Aug 13, 2008 at 08:48:19PM +0100, Marcin Obara wrote:
> 2008/8/13 Greg KH <greg@kroah.com>:
> >> GET_VERSION is called frequently
> >
> > Why? Shouldn't it only be called once?
> Once per connection. But you can have many clients connecting.
Is that a real issue?
> >> With ioctl - only one file handle is used, and userspace client logic
> >> is simpler.
> >
> > But the kernel is messier and we are trying to not add any more ioctls
> > to it. Especially for trivial things like the version number of the
> > hardware device.
> It's rather protocol version (=running software version) supported by
> hardware device.
> Hmmm, I just didn't know that there is something wrong with ioctls.
There always have been :)
> >> Normal flow looks like:
> >>
> >> open
> >> ioctl(GET_VERSION)
> >
> > Great, do an additional open/read/close here for the version, I think
> > you will find it pretty trivial to do :)
> Right, it's trivial.... but will make userspace source code messier and bigger.
>
> Btw. I know we have powerful CPUs... but small wasting resources is
> still wasting resources... so we still need new CPUs :-).
So you keep your employer in business :)
Seriously, an ioctl for a hardware version number is total overkill
here. Your other ioctls are also suspect, please repost with the
description of why they are all needed, with documentation about the
user/kernel interface you have created here.
thanks,
greg k-h
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-08-13 18:18 ` Greg KH
@ 2008-08-13 19:48 ` Marcin Obara
2008-08-14 0:23 ` Greg KH
0 siblings, 1 reply; 42+ messages in thread
From: Marcin Obara @ 2008-08-13 19:48 UTC (permalink / raw)
To: Greg KH; +Cc: linux-kernel
2008/8/13 Greg KH <greg@kroah.com>:
>> GET_VERSION is called frequently
>
> Why? Shouldn't it only be called once?
Once per connection. But you can have many clients connecting.
>> With ioctl - only one file handle is used, and userspace client logic
>> is simpler.
>
> But the kernel is messier and we are trying to not add any more ioctls
> to it. Especially for trivial things like the version number of the
> hardware device.
It's rather protocol version (=running software version) supported by
hardware device.
Hmmm, I just didn't know that there is something wrong with ioctls.
>> Normal flow looks like:
>>
>> open
>> ioctl(GET_VERSION)
>
> Great, do an additional open/read/close here for the version, I think
> you will find it pretty trivial to do :)
Right, it's trivial.... but will make userspace source code messier and bigger.
Btw. I know we have powerful CPUs... but small wasting resources is
still wasting resources... so we still need new CPUs :-).
Regards
Marcin
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-08-13 7:16 ` Marcin Obara
@ 2008-08-13 18:18 ` Greg KH
2008-08-13 19:48 ` Marcin Obara
0 siblings, 1 reply; 42+ messages in thread
From: Greg KH @ 2008-08-13 18:18 UTC (permalink / raw)
To: Marcin Obara; +Cc: linux-kernel
On Wed, Aug 13, 2008 at 08:16:02AM +0100, Marcin Obara wrote:
> 2008/8/13 Greg KH <greg@kroah.com>:
> > On Mon, Aug 11, 2008 at 09:23:01PM +0200, Marcin Obara wrote:
> >> +/* IOCTL commands */
> >> +#define IOCTL_HECI_GET_VERSION \
> >> + _IOWR('H' , 0x0, struct heci_message_data)
> >
> > This can easily be a sysfs file, why not do that instead?
> >
> sysfs file would require additional file handle used by every userspace client.
So, is that really a great overhead?
> GET_VERSION is called frequently
Why? Shouldn't it only be called once?
>, and sysfs file would create extra overhead.
Have you measured it?
> With ioctl - only one file handle is used, and userspace client logic
> is simpler.
But the kernel is messier and we are trying to not add any more ioctls
to it. Especially for trivial things like the version number of the
hardware device.
> Normal flow looks like:
>
> open
> ioctl(GET_VERSION)
Great, do an additional open/read/close here for the version, I think
you will find it pretty trivial to do :)
thanks,
greg k-h
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-08-13 0:58 ` Greg KH
@ 2008-08-13 7:16 ` Marcin Obara
2008-08-13 18:18 ` Greg KH
0 siblings, 1 reply; 42+ messages in thread
From: Marcin Obara @ 2008-08-13 7:16 UTC (permalink / raw)
To: Greg KH; +Cc: linux-kernel
2008/8/13 Greg KH <greg@kroah.com>:
> On Mon, Aug 11, 2008 at 09:23:01PM +0200, Marcin Obara wrote:
>> +/* IOCTL commands */
>> +#define IOCTL_HECI_GET_VERSION \
>> + _IOWR('H' , 0x0, struct heci_message_data)
>
> This can easily be a sysfs file, why not do that instead?
>
sysfs file would require additional file handle used by every userspace client.
GET_VERSION is called frequently, and sysfs file would create extra overhead.
With ioctl - only one file handle is used, and userspace client logic
is simpler.
Normal flow looks like:
open
ioctl(GET_VERSION)
ioctl(CONNECT)
... - do some operations - depends on version
close
or:
open
ioctl(CONNECT)
.. - do some operations
close
--
Marcin
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-08-11 19:23 ` Marcin Obara
2008-08-12 4:53 ` Andrew Morton
@ 2008-08-13 0:58 ` Greg KH
2008-08-13 7:16 ` Marcin Obara
1 sibling, 1 reply; 42+ messages in thread
From: Greg KH @ 2008-08-13 0:58 UTC (permalink / raw)
To: Marcin Obara; +Cc: linux-kernel, Pavel Machek, Andrew Morton
On Mon, Aug 11, 2008 at 09:23:01PM +0200, Marcin Obara wrote:
> +/* IOCTL commands */
> +#define IOCTL_HECI_GET_VERSION \
> + _IOWR('H' , 0x0, struct heci_message_data)
This can easily be a sysfs file, why not do that instead?
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-08-12 19:24 ` Marcin Obara
2008-08-12 19:24 ` Alan Cox
@ 2008-08-12 21:03 ` Arjan van de Ven
1 sibling, 0 replies; 42+ messages in thread
From: Arjan van de Ven @ 2008-08-12 21:03 UTC (permalink / raw)
To: Marcin Obara; +Cc: Jiri Slaby, Andrew Morton, linux-kernel
On Tue, 12 Aug 2008 20:24:51 +0100
"Marcin Obara" <marcin_obara@users.sourceforge.net> wrote:
> Sorry.
> I will try to explain.
> This source code was designed few years ago and there is already
> written userspace software.
that's not a good argument really...... especially not for adding a bad
interface.
--
If you want to reach me at my work email, use arjan@linux.intel.com
For development, discussion and tips for power savings,
visit http://www.lesswatts.org
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-08-12 16:15 ` Jiri Slaby
@ 2008-08-12 19:24 ` Marcin Obara
2008-08-12 19:24 ` Alan Cox
2008-08-12 21:03 ` Arjan van de Ven
0 siblings, 2 replies; 42+ messages in thread
From: Marcin Obara @ 2008-08-12 19:24 UTC (permalink / raw)
To: Jiri Slaby; +Cc: Andrew Morton, linux-kernel
2008/8/12 Jiri Slaby <jirislaby@gmail.com>:
> On 08/12/2008 06:53 AM, Andrew Morton wrote:
>>
>> On Mon, 11 Aug 2008 21:23:01 +0200 (CEST)
>> Marcin Obara <marcin_obara@users.sourceforge.net> wrote:
>>> +#define ECORRUPTED_MESSAGE_HEADER 1000
>>> +#define ECOMPLETE_MESSAGE 1001
>>
>> What's this? The driver defines its onw errno numbers?
>>
>> Are these ever returned to userspace?
>>
>> This is risky/confusing/misleading, isn't it?
>
> Yes and already pointed out. This leaks to userspace and it's wrong. Please
> go and read my comments to version #1 once again and if you don't understand
> anything, please drop a message, but do not silently ignore others'
> comments.
Sorry.
I will try to explain.
This source code was designed few years ago and there is already
written userspace software.
Removal of driver internal error codes may affect software.
I think it is more risky than keeping these own errno numbers.
>
> E.g. unlocked_ioctl switch hasn't been done plus other things mentioned
> below too (not all of them)
>
unlocked_ioctl would require to add lock as big kernel lock replacement.
It is risky in such complex code, especially if speed increase is not expected.
>>> + spin_lock_bh(&dev->device_lock);
>>> + dev->wd_timer.function = &heci_wd_timer;
>>> + dev->wd_timer.data = (unsigned long) dev;
>>> + spin_unlock_bh(&dev->device_lock);
>>
>> Use setup_timer().
>>
>> Note that setup_timer() does init_timer(), but we already have an
>> init_timer(dev->wd_timer) elsewhere. Please sort that out.
>
> Already commented, left unchanged and without an explanation.
Sorry.
Explanation:
We don't want to init_timer() here. It is done later, to avoid race condition.
We only configure timer, but we are not ready to start it.
>
>>> +/* IOCTL commands */
>>> +#define IOCTL_HECI_GET_VERSION \
>>> + _IOWR('H' , 0x0, struct heci_message_data)
> ... and conflicts with hid as I commented before.
Sorry for missing explanations.
This conflict can't be avoided, because there is already written
software that depends on these ioctl definitions.
--
Regards
Marcin
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-08-12 19:24 ` Marcin Obara
@ 2008-08-12 19:24 ` Alan Cox
2008-08-12 21:03 ` Arjan van de Ven
1 sibling, 0 replies; 42+ messages in thread
From: Alan Cox @ 2008-08-12 19:24 UTC (permalink / raw)
To: Marcin Obara; +Cc: Jiri Slaby, Andrew Morton, linux-kernel
> This source code was designed few years ago and there is already
> written userspace software.
Diddums that is what you get for keeping stuff away from upstream
> Removal of driver internal error codes may affect software.
> I think it is more risky than keeping these own errno numbers.
I would disagree. We use ERR_PTR() and other macros with errors. Using
strange numbers is asking for risk.
>
> >
> > E.g. unlocked_ioctl switch hasn't been done plus other things mentioned
> > below too (not all of them)
> >
> unlocked_ioctl would require to add lock as big kernel lock replacement.
> It is risky in such complex code, especially if speed increase is not expected.
>
> We don't want to init_timer() here. It is done later, to avoid race condition.
> We only configure timer, but we are not ready to start it.
init_timer does not start a timer.
> >
> >>> +/* IOCTL commands */
> >>> +#define IOCTL_HECI_GET_VERSION \
> >>> + _IOWR('H' , 0x0, struct heci_message_data)
> > ... and conflicts with hid as I commented before.
>
> Sorry for missing explanations.
> This conflict can't be avoided, because there is already written
> software that depends on these ioctl definitions.
See "diddums" message above. You mess up tools like strace if you don't
fix this and strace is more important than some minor driver detail
caused by not upstreaming code earlier.
The non unlocked version of ioctl() is going away and the BKL will in
time follow so you might as well deal with that now too.
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-08-12 4:53 ` Andrew Morton
@ 2008-08-12 16:15 ` Jiri Slaby
2008-08-12 19:24 ` Marcin Obara
0 siblings, 1 reply; 42+ messages in thread
From: Jiri Slaby @ 2008-08-12 16:15 UTC (permalink / raw)
To: Andrew Morton; +Cc: Marcin Obara, linux-kernel, pavel
On 08/12/2008 06:53 AM, Andrew Morton wrote:
> On Mon, 11 Aug 2008 21:23:01 +0200 (CEST)
> Marcin Obara <marcin_obara@users.sourceforge.net> wrote:
>> +/*
>> + * error code definition
>> + */
>> +#define ESLOTS_OVERFLOW 1
>> +#define ECORRUPTED_MESSAGE_HEADER 1000
>> +#define ECOMPLETE_MESSAGE 1001
>
> What's this? The driver defines its onw errno numbers?
>
> Are these ever returned to userspace?
>
> This is risky/confusing/misleading, isn't it?
Yes and already pointed out. This leaks to userspace and it's wrong. Please go
and read my comments to version #1 once again and if you don't understand
anything, please drop a message, but do not silently ignore others' comments.
E.g. unlocked_ioctl switch hasn't been done plus other things mentioned below
too (not all of them)
>> +static void host_init_wd(struct iamt_heci_device *dev)
>> +{
>> + spin_lock_bh(&dev->device_lock);
>> +
>> + heci_init_file_private(&dev->wd_file_ext, NULL);
>> +
>> + /* look for WD client and connect to it */
>> + dev->wd_file_ext.state = HECI_FILE_DISCONNECTED;
>> + dev->wd_timeout = 0;
>> +
>> + if (dev->asf_mode) {
>> + memcpy(dev->wd_data, heci_stop_wd_params, HECI_WD_PARAMS_SIZE);
>> + } else {
>> + /* AMT mode */
>> + dev->wd_timeout = AMT_WD_VALUE;
>> + DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
>> + memcpy(dev->wd_data, heci_start_wd_params, HECI_WD_PARAMS_SIZE);
>> + memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
>> + &dev->wd_timeout, sizeof(__u16));
>> + }
>> +
>> + /* find ME WD client */
>> + heci_find_me_client(dev, &dev->wd_file_ext,
>> + &heci_wd_guid, HECI_WD_HOST_CLIENT_ID);
>> + spin_unlock_bh(&dev->device_lock);
>> +
>> + DBG("check wd_file_ext\n");
>> + if (HECI_FILE_CONNECTING == dev->wd_file_ext.state) {
>> + if (heci_connect_me_client(dev, &dev->wd_file_ext, 15) == 1) {
>> + DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
>> + if (dev->wd_timeout != 0)
>> + dev->wd_due_counter = 1;
>> + else
>> + dev->wd_due_counter = 0;
>> + DBG("successfully connected to WD client.\n");
>> + }
>> + } else
>> + DBG("failed to find WD client.\n");
>> +
>> +
>> + spin_lock_bh(&dev->device_lock);
>> + dev->wd_timer.function = &heci_wd_timer;
>> + dev->wd_timer.data = (unsigned long) dev;
>> + spin_unlock_bh(&dev->device_lock);
>
> Use setup_timer().
>
> Note that setup_timer() does init_timer(), but we already have an
> init_timer(dev->wd_timer) elsewhere. Please sort that out.
Already commented, left unchanged and without an explanation.
>> +/* IOCTL commands */
>> +#define IOCTL_HECI_GET_VERSION \
>> + _IOWR('H' , 0x0, struct heci_message_data)
>> +#define IOCTL_HECI_CONNECT_CLIENT \
>> + _IOWR('H' , 0x01, struct heci_message_data)
>> +#define IOCTL_HECI_WD \
>> + _IOWR('H' , 0x02, struct heci_message_data)
>> +#define IOCTL_HECI_BYPASS_WD \
>> + _IOWR('H' , 0x10, struct heci_message_data)
>
> So this driver implements ioctls!
>
> That is a core, top-level, userspace-visible design decision! It
> should have been given prominent billing in the changelog description.
>
>
> These four values are supposed to be exported to userspace headers,
> yes? But they're buried in a kernel-internal header and don't have the
> appropriate __KERNEL__ wrappers.
... and conflicts with hid as I commented before. Also ioctl-number.txt update
should be done.
>> + if (!dev->mem_addr) {
>> + printk(KERN_ERR "heci: Remap IO device memory failure.\n");
>> + err = -ENOMEM;
>> + goto free_device;
>> + }
>> + /* request and enable interrupt */
>> + err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
>> + heci_driver_name, dev);
>
> Doing request_irq() after pci_enable_device() is dengerous. If the
> device happened to be requesting an interrupt when we did
> pci_enable_device(), things will generally go pear-shaped.
Hm, no, pci_enable_device sets up irq (i.e. even pdev->irq), this is correct
sequence. Actually one should not touch pdev before enabling the device it's
describing in most cases.
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-08-11 19:23 ` Marcin Obara
@ 2008-08-12 4:53 ` Andrew Morton
2008-08-12 16:15 ` Jiri Slaby
2008-08-13 0:58 ` Greg KH
1 sibling, 1 reply; 42+ messages in thread
From: Andrew Morton @ 2008-08-12 4:53 UTC (permalink / raw)
To: Marcin Obara; +Cc: linux-kernel, pavel
On Mon, 11 Aug 2008 21:23:01 +0200 (CEST)
Marcin Obara <marcin_obara@users.sourceforge.net> wrote:
> Fixes small issues (2 comment and 2 variable type changes)
> raised by Pavel Machek since previous LKML submition.
>
>
> The Intel Management Engine Interface (aka HECI: Host Embedded
> Controller Interface ) enables communication between the host OS and
> the Management Engine firmware. MEI is bi-directional, and either the
> host or Intel AMT firmware can initiate transactions.
>
> The core hardware architecture of Intel Active Management Technology
> (Intel AMT) is resident in firmware. The micro-controller within the
> chipset's graphics and memory controller (GMCH) hub houses the
> Management Engine (ME) firmware, which implements various services
> on behalf of management applications.
>
> Some of the ME subsystems that can be access via MEI driver:
>
> - Intel(R) Quiet System Technology (QST) is implemented as a firmware
> subsystem that runs in the ME. Programs that wish to expose the
> health monitoring and fan speed control capabilities of Intel(R) QST
> will need to use the MEI driver to communicate with the ME sub-system.
> - ASF is the "Alert Standard Format" which is an DMTF manageability
> standard. It is implemented in the PC's hardware and firmware, and is
> managed from a remote console.
>
> Most recent Intel desktop chipsets have one or more of the above ME
> services. The MEI driver will make it possible to support the above
> features on Linux and provides applications access to the ME and it's
> features.
>
This code adds new kernel->userspace interfaces?
Please fully document those interfaces so that we can review the
proposed design.
What follows is a low-level review. I didn't really address the
higher-level design aspects because even having read it, I don't know
what all this code does, because I wasn't told. I could work that out,
but I'd prefer not to have to, because that means that everyone else
who wishes to maintain this code would need to do the same thing. That
isn't very efficient.
>
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index b343814..f473f95 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -2247,6 +2247,15 @@ L: e1000-devel@lists.sourceforge.net
> W: http://e1000.sourceforge.net/
> S: Supported
>
> +INTEL MANAGEABILITY ENGINE INTERFACE (HECI)
> +P: Anas Nashif
> +M: anas.nashif@intel.com
> +P: Marcin Obara
> +M: marcin.obara@intel.com
> +W: http://www.openamt.org/
> +L: openamt-devel@lists.sourceforge.net
> +S: Supported
> +
> INTEL PRO/WIRELESS 2100 NETWORK CONNECTION SUPPORT
> P: Zhu Yi
> M: yi.zhu@intel.com
> diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
> index caff851..a49821d 100644
> --- a/drivers/char/Kconfig
> +++ b/drivers/char/Kconfig
> @@ -1103,6 +1103,7 @@ config DEVPORT
> default y
>
> source "drivers/s390/char/Kconfig"
> +source "drivers/char/heci/Kconfig"
>
> endmenu
>
> diff --git a/drivers/char/Makefile b/drivers/char/Makefile
> index 6850f6d..8ad2f2c 100644
> --- a/drivers/char/Makefile
> +++ b/drivers/char/Makefile
> @@ -105,6 +105,7 @@ obj-$(CONFIG_IPMI_HANDLER) += ipmi/
>
> obj-$(CONFIG_HANGCHECK_TIMER) += hangcheck-timer.o
> obj-$(CONFIG_TCG_TPM) += tpm/
> +obj-$(CONFIG_INTEL_MEI) += heci/
>
> obj-$(CONFIG_PS3_FLASH) += ps3flash.o
>
> diff --git a/drivers/char/heci/Kconfig b/drivers/char/heci/Kconfig
> new file mode 100644
> index 0000000..99b7d05
> --- /dev/null
> +++ b/drivers/char/heci/Kconfig
> @@ -0,0 +1,12 @@
> +#
> +# HECI device configuration
> +#
> +
> +config INTEL_MEI
> + tristate "Intel Management Engine Interface (MEI) Support (EXPERIMENTAL)"
> + depends on EXPERIMENTAL
> + ---help---
> + The Intel Management Engine Interface (Intel MEI) driver allows
> + applications to access the Active Management Technology
> + firmware and other Management Engine sub-systems.
> +
> diff --git a/drivers/char/heci/Makefile b/drivers/char/heci/Makefile
> new file mode 100644
> index 0000000..a2d7182
> --- /dev/null
> +++ b/drivers/char/heci/Makefile
> @@ -0,0 +1,7 @@
> +#
> +## Makefile for the Intel MEI driver (heci)
> +#
> +
> +obj-$(CONFIG_INTEL_MEI) += heci.o
> +
> +heci-objs := heci_init.o heci_interface.o heci_main.o interrupt.o io_heci.o
> diff --git a/drivers/char/heci/heci.h b/drivers/char/heci/heci.h
> new file mode 100644
> index 0000000..9b279f3
> --- /dev/null
> +++ b/drivers/char/heci/heci.h
> @@ -0,0 +1,176 @@
> +/*
> + * Part of Intel(R) Manageability Engine Interface Linux driver
> + *
> + * Copyright (c) 2003 - 2008 Intel Corp.
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + * 1. Redistributions of source code must retain the above copyright
> + * notice, this list of conditions, and the following disclaimer,
> + * without modification.
> + * 2. Redistributions in binary form must reproduce at minimum a disclaimer
> + * substantially similar to the "NO WARRANTY" disclaimer below
> + * ("Disclaimer") and any redistribution must be conditioned upon
> + * including a substantially similar Disclaimer requirement for further
> + * binary redistribution.
> + * 3. Neither the names of the above-listed copyright holders nor the names
> + * of any contributors may be used to endorse or promote products derived
> + * from this software without specific prior written permission.
> + *
> + * Alternatively, this software may be distributed under the terms of the
> + * GNU General Public License ("GPL") version 2 as published by the Free
> + * Software Foundation.
> + *
> + * NO WARRANTY
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
> + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
> + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
> + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> + * POSSIBILITY OF SUCH DAMAGES.
> + *
> + */
> +
> +#ifndef _HECI_H_
> +#define _HECI_H_
> +
> +#include <linux/version.h>
> +#include <linux/spinlock.h>
> +#include <linux/list.h>
> +#include <linux/pci.h>
> +#include <linux/timer.h>
> +#include <linux/interrupt.h>
> +#include <linux/workqueue.h>
> +#include <linux/module.h>
> +#include <linux/aio.h>
> +#include <linux/types.h>
> +#include "heci_data_structures.h"
> +
> +extern const struct guid heci_pthi_guid;
> +extern const struct guid heci_wd_guid;
> +extern const __u8 heci_start_wd_params[];
> +extern const __u8 heci_stop_wd_params[];
> +extern const __u8 heci_wd_state_independence_msg[3][4];
> +
> +/*
> + * heci device ID
> + */
> +#define HECI_DEV_ID_82946GZ 0x2974 /* 82946GZ/GL */
> +#define HECI_DEV_ID_82G35 0x2984 /* 82G35 Express */
> +#define HECI_DEV_ID_82Q965 0x2994 /* 82Q963/Q965 */
> +#define HECI_DEV_ID_82G965 0x29A4 /* 82P965/G965 */
> +
> +#define HECI_DEV_ID_82GM965 0x2A04 /* Mobile PM965/GM965 */
> +#define HECI_DEV_ID_82GME965 0x2A14 /* Mobile GME965/GLE960 */
> +
> +#define HECI_DEV_ID_ICH9_82Q35 0x29B4 /* 82Q35 Express */
> +#define HECI_DEV_ID_ICH9_82G33 0x29C4 /* 82G33/G31/P35/P31 Express */
> +#define HECI_DEV_ID_ICH9_82Q33 0x29D4 /* 82Q33 Express */
> +#define HECI_DEV_ID_ICH9_82X38 0x29E4 /* 82X38/X48 Express */
> +#define HECI_DEV_ID_ICH9_3200 0x29F4 /* 3200/3210 Server */
> +
> +#define HECI_DEV_ID_ICH9_6 0x28B4 /* Bearlake */
> +#define HECI_DEV_ID_ICH9_7 0x28C4 /* Bearlake */
> +#define HECI_DEV_ID_ICH9_8 0x28D4 /* Bearlake */
> +#define HECI_DEV_ID_ICH9_9 0x28E4 /* Bearlake */
> +#define HECI_DEV_ID_ICH9_10 0x28F4 /* Bearlake */
> +
> +#define HECI_DEV_ID_ICH9M_1 0x2A44 /* Cantiga */
> +#define HECI_DEV_ID_ICH9M_2 0x2A54 /* Cantiga */
> +#define HECI_DEV_ID_ICH9M_3 0x2A64 /* Cantiga */
> +#define HECI_DEV_ID_ICH9M_4 0x2A74 /* Cantiga */
> +
> +#define HECI_DEV_ID_ICH10_1 0x2E04 /* Eaglelake */
> +#define HECI_DEV_ID_ICH10_2 0x2E14 /* Eaglelake */
> +#define HECI_DEV_ID_ICH10_3 0x2E24 /* Eaglelake */
> +#define HECI_DEV_ID_ICH10_4 0x2E34 /* Eaglelake */
> +
> +/*
> + * heci init function prototypes
> + */
> +struct iamt_heci_device *init_heci_device(struct pci_dev *pdev);
> +void heci_reset(struct iamt_heci_device *dev, int interrupts);
> +int heci_hw_init(struct iamt_heci_device *dev);
> +int heci_task_initialize_clients(void *data);
> +int heci_initialize_clients(struct iamt_heci_device *dev);
> +struct heci_file_private *heci_alloc_file_private(struct file *file);
> +int heci_disconnect_host_client(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext);
> +void heci_initialize_list(struct io_heci_list *list,
> + struct iamt_heci_device *dev);
> +void heci_flush_list(struct io_heci_list *list,
> + struct heci_file_private *file_ext);
> +void heci_flush_queues(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext);
> +
> +void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
> + __u8 host_client_id);
> +
> +/*
> + * interrupt function prototype
> + */
> +irqreturn_t heci_isr_interrupt(int irq, void *dev_id);
> +
> +void heci_wd_timer(unsigned long data);
> +
> +/*
> + * input output function prototype
> + */
> +int heci_ioctl_get_version(struct iamt_heci_device *dev, int if_num,
> + struct heci_message_data *u_msg,
> + struct heci_message_data k_msg,
> + struct heci_file_private *file_ext);
> +
> +int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num,
> + struct heci_message_data *u_msg,
> + struct heci_message_data k_msg,
> + struct file *file);
> +
> +int heci_ioctl_wd(struct iamt_heci_device *dev, int if_num,
> + struct heci_message_data k_msg,
> + struct heci_file_private *file_ext);
> +
> +int heci_ioctl_bypass_wd(struct iamt_heci_device *dev, int if_num,
> + struct heci_message_data k_msg,
> + struct heci_file_private *file_ext);
> +
> +int heci_start_read(struct iamt_heci_device *dev, int if_num,
> + struct heci_file_private *file_ext);
> +
> +int pthi_write(struct iamt_heci_device *dev,
> + struct heci_cb_private *priv_cb);
> +
> +int pthi_read(struct iamt_heci_device *dev, int if_num, struct file *file,
> + char *ubuf, size_t length, loff_t *offset);
> +
> +struct heci_cb_private *find_pthi_read_list_entry(
> + struct iamt_heci_device *dev,
> + struct file *file);
> +
> +void run_next_iamthif_cmd(struct iamt_heci_device *dev);
> +
> +void heci_free_cb_private(struct heci_cb_private *priv_cb);
> +
> +/**
> + * heci_fe_same_id - tell if file private data have same id
> + *
> + * @fe1: private data of 1. file object
> + * @fe2: private data of 2. file object
> + *
> + * returns !=0 - if ids are the same, 0 - if differ.
> + */
> +static inline int heci_fe_same_id(const struct heci_file_private *fe1,
> + const struct heci_file_private *fe2)
> +{
> + return ((fe1->host_client_id == fe2->host_client_id)
> + && (fe1->me_client_id == fe2->me_client_id));
> +}
> +
> +#endif /* _HECI_H_ */
> diff --git a/drivers/char/heci/heci_data_structures.h b/drivers/char/heci/heci_data_structures.h
> new file mode 100644
> index 0000000..beacf7c
> --- /dev/null
> +++ b/drivers/char/heci/heci_data_structures.h
> @@ -0,0 +1,536 @@
> +/*
> + * Part of Intel(R) Manageability Engine Interface Linux driver
> + *
> + * Copyright (c) 2003 - 2008 Intel Corp.
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + * 1. Redistributions of source code must retain the above copyright
> + * notice, this list of conditions, and the following disclaimer,
> + * without modification.
> + * 2. Redistributions in binary form must reproduce at minimum a disclaimer
> + * substantially similar to the "NO WARRANTY" disclaimer below
> + * ("Disclaimer") and any redistribution must be conditioned upon
> + * including a substantially similar Disclaimer requirement for further
> + * binary redistribution.
> + * 3. Neither the names of the above-listed copyright holders nor the names
> + * of any contributors may be used to endorse or promote products derived
> + * from this software without specific prior written permission.
> + *
> + * Alternatively, this software may be distributed under the terms of the
> + * GNU General Public License ("GPL") version 2 as published by the Free
> + * Software Foundation.
> + *
> + * NO WARRANTY
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
> + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
> + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
> + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> + * POSSIBILITY OF SUCH DAMAGES.
> + *
> + */
> +
> +#ifndef _HECI_DATA_STRUCTURES_H_
> +#define _HECI_DATA_STRUCTURES_H_
> +
> +#include <linux/version.h>
> +#include <linux/spinlock.h>
> +#include <linux/list.h>
> +#include <linux/pci.h>
> +#include <linux/timer.h>
> +#include <linux/interrupt.h>
> +#include <linux/workqueue.h>
> +#include <linux/module.h>
> +#include <linux/aio.h>
> +#include <linux/types.h>
> +
> +/*
> + * error code definition
> + */
> +#define ESLOTS_OVERFLOW 1
> +#define ECORRUPTED_MESSAGE_HEADER 1000
> +#define ECOMPLETE_MESSAGE 1001
What's this? The driver defines its onw errno numbers?
Are these ever returned to userspace?
This is risky/confusing/misleading, isn't it?
> +#define HECI_FC_MESSAGE_RESERVED_LENGTH 5
> +
> +/*
> + * Number of queue lists used by this driver
> + */
> +#define HECI_IO_LISTS_NUMBER 7
> +
> +/*
> + * Maximum transmission unit (MTU) of heci messages
> + */
> +#define IAMTHIF_MTU 4160
> +
> +
> +/*
> + * HECI HW Section
> + */
> +
> +/* HECI registers */
> +/* H_CB_WW - Host Circular Buffer (CB) Write Window register */
> +#define H_CB_WW 0
> +/* H_CSR - Host Control Status register */
> +#define H_CSR 4
> +/* ME_CB_RW - ME Circular Buffer Read Window register (read only) */
> +#define ME_CB_RW 8
> +/* ME_CSR_HA - ME Control Status Host Access register (read only) */
> +#define ME_CSR_HA 0xC
> +
> +
> +/* register bits of H_CSR (Host Control Status register) */
> +/* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */
> +#define H_CBD 0xFF000000
> +/* Host Circular Buffer Write Pointer */
> +#define H_CBWP 0x00FF0000
> +/* Host Circular Buffer Read Pointer */
> +#define H_CBRP 0x0000FF00
> +/* Host Reset */
> +#define H_RST 0x00000010
> +/* Host Ready */
> +#define H_RDY 0x00000008
> +/* Host Interrupt Generate */
> +#define H_IG 0x00000004
> +/* Host Interrupt Status */
> +#define H_IS 0x00000002
> +/* Host Interrupt Enable */
> +#define H_IE 0x00000001
> +
> +
> +/* register bits of ME_CSR_HA (ME Control Status Host Access register) */
> +/* ME CB (Circular Buffer) Depth HRA (Host Read Access)
> + * - host read only access to ME_CBD */
> +#define ME_CBD_HRA 0xFF000000
> +/* ME CB Write Pointer HRA - host read only access to ME_CBWP */
> +#define ME_CBWP_HRA 0x00FF0000
> +/* ME CB Read Pointer HRA - host read only access to ME_CBRP */
> +#define ME_CBRP_HRA 0x0000FF00
> +/* ME Reset HRA - host read only access to ME_RST */
> +#define ME_RST_HRA 0x00000010
> +/* ME Ready HRA - host read only access to ME_RDY */
> +#define ME_RDY_HRA 0x00000008
> +/* ME Interrupt Generate HRA - host read only access to ME_IG */
> +#define ME_IG_HRA 0x00000004
> +/* ME Interrupt Status HRA - host read only access to ME_IS */
> +#define ME_IS_HRA 0x00000002
> +/* ME Interrupt Enable HRA - host read only access to ME_IE */
> +#define ME_IE_HRA 0x00000001
> +
> +#define HECI_MINORS_BASE 1
> +#define HECI_MINORS_COUNT 1
> +
> +#define HECI_MINOR_NUMBER 1
> +#define HECI_MAX_OPEN_HANDLE_COUNT 253
> +
> +/*
> + * debug kernel print macro define
> + */
> +extern int heci_debug;
> +extern struct device *heci_dev;
> +
> +#define DBG(format, arg...) do { \
> + if (heci_debug) { \
> + if (heci_dev) \
> + dev_info(heci_dev, "%s: " format, __func__, ## arg); \
> + else \
> + printk(KERN_INFO "heci: %s: " format, \
> + __func__, ## arg); \
> + } \
> +} while (0)
This macro is a bit dangerous. If code does
DBG("%d", foo++)
then the value of `foo' will depend upon whether or not heci_debug is set.
A programmer would need to be damn stupid to pass an
expression-with-side-effects into a debugging macro, so I don't think
anything needs to be done here. Just sayin'.
Actually, the bigger risk is code will do
DBG("%d", foo->bar);
and `foo' is NULL. We don't get to find out about the bug until
someone enables runtime debugging.
> +
> +/*
> + * time to wait HECI become ready after init
> + */
> +#define HECI_INTEROP_TIMEOUT (HZ * 7)
> +
> +/*
> + * watch dog definition
> + */
> +#define HECI_WATCHDOG_DATA_SIZE 16
> +#define HECI_START_WD_DATA_SIZE 20
> +#define HECI_WD_PARAMS_SIZE 4
> +#define HECI_WD_STATE_INDEPENDENCE_MSG_SENT (1 << 0)
> +
> +#define HECI_WD_HOST_CLIENT_ID 1
> +#define HECI_IAMTHIF_HOST_CLIENT_ID 2
> +
> +struct guid {
> + __u32 data1;
> + __u16 data2;
> + __u16 data3;
> + __u8 data4[8];
> +};
> +
> +/* File state */
> +enum file_state {
> + HECI_FILE_INITIALIZING = 0,
> + HECI_FILE_CONNECTING,
> + HECI_FILE_CONNECTED,
> + HECI_FILE_DISCONNECTING,
> + HECI_FILE_DISCONNECTED
> +};
> +
> +/* HECI device states */
> +enum heci_states {
> + HECI_INITIALIZING = 0,
> + HECI_ENABLED,
> + HECI_RESETING,
> + HECI_DISABLED,
> + HECI_RECOVERING_FROM_RESET,
> + HECI_POWER_DOWN,
> + HECI_POWER_UP
> +};
> +
> +enum iamthif_states {
> + HECI_IAMTHIF_IDLE,
> + HECI_IAMTHIF_WRITING,
> + HECI_IAMTHIF_FLOW_CONTROL,
> + HECI_IAMTHIF_READING,
> + HECI_IAMTHIF_READ_COMPLETE
> +};
> +
> +enum heci_file_transaction_states {
> + HECI_IDLE,
> + HECI_WRITING,
> + HECI_WRITE_COMPLETE,
> + HECI_FLOW_CONTROL,
> + HECI_READING,
> + HECI_READ_COMPLETE
> +};
> +
> +/* HECI CB */
> +enum heci_cb_major_types {
> + HECI_READ = 0,
> + HECI_WRITE,
> + HECI_IOCTL,
> + HECI_OPEN,
> + HECI_CLOSE
> +};
> +
> +/* HECI user data struct */
> +struct heci_message_data {
> + __u32 size;
> + char *data;
> +} __attribute__((packed));
> +
> +#define HECI_CONNECT_TIMEOUT 3 /* at least 2 seconds */
> +
> +#define IAMTHIF_STALL_TIMER 12 /* seconds */
> +#define IAMTHIF_READ_TIMER 15 /* seconds */
> +
> +struct heci_cb_private {
> + struct list_head cb_list;
> + enum heci_cb_major_types major_file_operations;
> + void *file_private;
> + struct heci_message_data request_buffer;
> + struct heci_message_data response_buffer;
> + unsigned long information;
> + unsigned long read_time;
> + struct file *file_object;
> +};
I find that the most valuable code comments are those which document
the core data structures. For each field: what its role in life is,
what its relationship is with other fields and other structures, what
its locking rules are, etc.
Right now, this reader of your code is wondering about cb_list.
- What is it? I _think_ it's the means by which multiple instances
of heci_cb_private are attached to a heci_file_private?
- What lock protects that list? heci_file_private.file_lock,
perhaps? That was unobvious from a quick read of the code.
This stuff matters. It's basically the first thing which a reviewer of
the design and implementation wants to know about, and that reviewer
doesn't want to have to dive intothe implementation, then
reverse-engineer the design, then go back and review how accurately the
code actually implements that design.
IOW: better code comments, please. This is more than a cosmetic
nicety. It is important for maintainability and for reviewability and
is worth spending quality time over.
Also, it is unusual that the code does
INIT_LIST_HEAD(heci_cb_private.cb_list) in two separate places. Please
check that this was intended+correct+desirable.
In numerous places, this code does
foo = (struct heci_file_private *)priv_cb_pos->file_private;
please remove all these typecasts of void*. They are unneeded and they
actually remove type-safety. If someone were to change priv_cb_pos to
a u8, they'll really want those compilation warnings/errors.
(OK, that's unlikely to happen, but the casts are ugly and add no
value).
> +/* Private file struct */
> +struct heci_file_private {
> + struct list_head link;
> + struct file *file;
> + enum file_state state;
> + wait_queue_head_t tx_wait;
> + wait_queue_head_t rx_wait;
> + wait_queue_head_t wait;
> + spinlock_t file_lock; /* file lock */
> + spinlock_t read_io_lock; /* read lock */
> + spinlock_t write_io_lock; /* write lock */
> + int read_pending;
> + int status;
> + /* ID of client connected */
> + __u8 host_client_id;
> + __u8 me_client_id;
> + __u8 flow_ctrl_creds;
> + __u8 timer_count;
> + enum heci_file_transaction_states reading_state;
> + enum heci_file_transaction_states writing_state;
> + int sm_state;
> + struct heci_cb_private *read_cb;
> +};
> +
> +struct io_heci_list {
> + struct heci_cb_private heci_cb;
> + int status;
> + struct iamt_heci_device *device_extension;
> +};
Again, the roles of and the relationship between the above three
structs is key to understanding the overall driver design.
> +struct heci_driver_version {
> + __u8 major;
> + __u8 minor;
> + __u8 hotfix;
> + __u16 build;
> +} __attribute__((packed));
> +
> +
> +struct heci_client {
> + __u32 max_msg_length;
> + __u8 protocol_version;
> +} __attribute__((packed));
What are these? They map onto some hardware-defined thing? In IO
space? DMA'ed into main memory? Dunno. Some explanation here would
help.
> +/*
> + * HECI BUS Interface Section
> + */
> +struct heci_msg_hdr {
> + __u32 me_addr:8;
> + __u32 host_addr:8;
> + __u32 length:9;
> + __u32 reserved:6;
> + __u32 msg_complete:1;
> +} __attribute__((packed));
> +
> +
> +struct hbm_cmd {
> + __u8 cmd:7;
> + __u8 is_response:1;
> +} __attribute__((packed));
> +
> +
> +struct heci_bus_message {
> + struct hbm_cmd cmd;
> + __u8 command_specific_data[];
> +} __attribute__((packed));
> +
> +struct hbm_version {
> + __u8 minor_version;
> + __u8 major_version;
> +} __attribute__((packed));
> +
> +struct hbm_host_version_request {
> + struct hbm_cmd cmd;
> + __u8 reserved;
> + struct hbm_version host_version;
> +} __attribute__((packed));
> +
> +struct hbm_host_version_response {
> + struct hbm_cmd cmd;
> + int host_version_supported;
> + struct hbm_version me_max_version;
> +} __attribute__((packed));
> +
> +struct hbm_host_stop_request {
> + struct hbm_cmd cmd;
> + __u8 reason;
> + __u8 reserved[2];
> +} __attribute__((packed));
> +
> +struct hbm_host_stop_response {
> + struct hbm_cmd cmd;
> + __u8 reserved[3];
> +} __attribute__((packed));
> +
> +struct hbm_me_stop_request {
> + struct hbm_cmd cmd;
> + __u8 reason;
> + __u8 reserved[2];
> +} __attribute__((packed));
> +
> +struct hbm_host_enum_request {
> + struct hbm_cmd cmd;
> + __u8 reserved[3];
> +} __attribute__((packed));
> +
> +struct hbm_host_enum_response {
> + struct hbm_cmd cmd;
> + __u8 reserved[3];
> + __u8 valid_addresses[32];
> +} __attribute__((packed));
> +
> +struct heci_client_properties {
> + struct guid protocol_name;
> + __u8 protocol_version;
> + __u8 max_number_of_connections;
> + __u8 fixed_address;
> + __u8 single_recv_buf;
> + __u32 max_msg_length;
> +} __attribute__((packed));
> +
> +struct hbm_props_request {
> + struct hbm_cmd cmd;
> + __u8 address;
> + __u8 reserved[2];
> +} __attribute__((packed));
> +
> +
> +struct hbm_props_response {
> + struct hbm_cmd cmd;
> + __u8 address;
> + __u8 status;
> + __u8 reserved[1];
> + struct heci_client_properties client_properties;
> +} __attribute__((packed));
> +
> +struct hbm_client_connect_request {
> + struct hbm_cmd cmd;
> + __u8 me_addr;
> + __u8 host_addr;
> + __u8 reserved;
> +} __attribute__((packed));
> +
> +struct hbm_client_connect_response {
> + struct hbm_cmd cmd;
> + __u8 me_addr;
> + __u8 host_addr;
> + __u8 status;
> +} __attribute__((packed));
> +
> +struct hbm_client_disconnect_request {
> + struct hbm_cmd cmd;
> + __u8 me_addr;
> + __u8 host_addr;
> + __u8 reserved[1];
> +} __attribute__((packed));
> +
> +struct hbm_flow_control {
> + struct hbm_cmd cmd;
> + __u8 me_addr;
> + __u8 host_addr;
> + __u8 reserved[HECI_FC_MESSAGE_RESERVED_LENGTH];
> +} __attribute__((packed));
> +
> +struct heci_me_client {
> + struct heci_client_properties props;
> + __u8 client_id;
> + __u8 flow_ctrl_creds;
> +} __attribute__((packed));
Dittoes.
> +/* private device struct */
> +struct iamt_heci_device {
> + struct pci_dev *pdev; /* pointer to pci device struct */
> + /*
> + * lists of queues
> + */
> + /* array of pointers to aio lists */
What is the relationship between this code and aio? I note that
several files include linux/aio.h, which was a bit of a surprise. No
other drivers do that.
This part of your design was perhaps more suited to
documentation-via-changelog than via code comments.
> + struct io_heci_list *io_list_array[HECI_IO_LISTS_NUMBER];
> + struct io_heci_list read_list; /* driver read queue */
> + struct io_heci_list write_list; /* driver write queue */
> + struct io_heci_list write_waiting_list; /* write waiting queue */
> + struct io_heci_list ctrl_wr_list; /* managed write IOCTL list */
> + struct io_heci_list ctrl_rd_list; /* managed read IOCTL list */
> + struct io_heci_list pthi_cmd_list; /* PTHI list for cmd waiting */
All protected by spin_lock_bh(iamt_heci_device.device_lock), it appears.
> + /* driver managed PTHI list for reading completed pthi cmd data */
> + struct io_heci_list pthi_read_complete_list;
> + /*
> + * list of files
> + */
> + struct list_head file_list;
list-heads are nasty things. Quite anonymous, quite type-unsafe. It's
a bit hard to tell which list_ehad gets strung onto which anchoring
list_head, and the compiler cannot tell when a programmer screws this
up. Suitable comments will help.
> + /*
> + * memory of device
> + */
> + unsigned int mem_base;
> + unsigned int mem_length;
What are these?
I'm surprised that they dont' have type resource_size_t or dma_addr_t
or void __iomem * or somesuch thing.
<reads the code a bit>
yup, resource_size_t.
> + char *mem_addr;
void __iomem *?
> + /*
> + * lock for the device
comment needs full detailing, please.
> + */
> + spinlock_t device_lock; /* device lock*/
> + struct work_struct work;
What's this?
I see two separate sites which are doing a
PREPARE_WORK(iamt_heci_device.work). This is quite unusual and
possibly incorrect. Please check it all. The one in
heci_isr_interrupt() is hopefully unneeded.
> + int recvd_msg;
> +
> + struct task_struct *reinit_tsk;
What's this?
Seems to be protected by device_lock?
> + struct timer_list wd_timer;
See comments below.
> + /*
> + * hw states of host and fw(ME)
> + */
> + __u32 host_hw_state;
> + __u32 me_hw_state;
nit: __u32 is normally only needed in data structures which are to be
included by userspace. This structure shouldn't be visible to
userspace compilation hence it could use plain old u32.
> + /*
> + * waiting queue for receive message from FW
> + */
> + wait_queue_head_t wait_recvd_msg;
> + wait_queue_head_t wait_stop_wd;
> + /*
> + * heci device states
> + */
> + enum heci_states heci_state;
> + int stop;
> +
> + __u32 extra_write_index;
> + __u32 rd_msg_buf[128]; /* used for control messages */
> + __u32 wr_msg_buf[128]; /* used for control messages */
> + __u32 ext_msg_buf[8]; /* for control responses */
> + __u32 rd_msg_hdr;
Seems strange that the above buffers are a per-device global. It
implies that the driver can only do one-message-at-a-time.
> +
> + struct hbm_version version;
> +
> + int host_buffer_is_empty;
> + struct heci_file_private wd_file_ext;
> + struct heci_me_client *me_clients; /* Note: memory has to be allocated*/
> + __u8 heci_me_clients[32]; /* list of existing clients */
> + __u8 num_heci_me_clients;
> + __u8 heci_host_clients[32]; /* list of existing clients */
This is an "array", nbot a list.
> + __u8 current_host_client_id;
> +
> + int wd_pending;
> + int wd_stoped;
"stopped"
> + __u16 wd_timeout; /* seconds ((wd_data[1] << 8) + wd_data[0]) */
> + unsigned char wd_data[HECI_START_WD_DATA_SIZE];
> +
> +
> + __u16 wd_due_counter;
> + int asf_mode;
> + int wd_bypass; /* if 1, don't refresh watchdog ME client */
> +
> + struct file *iamthif_file_object;
> + struct heci_file_private iamthif_file_ext;
> + int iamthif_ioctl;
> + int iamthif_canceled;
> + __u32 iamthif_timer;
> + __u32 iamthif_stall_timer;
> + unsigned char iamthif_msg_buf[IAMTHIF_MTU];
> + __u32 iamthif_msg_buf_size;
> + __u32 iamthif_msg_buf_index;
> + int iamthif_flow_control_pending;
> + enum iamthif_states iamthif_state;
> +
> + struct heci_cb_private *iamthif_current_cb;
> + __u8 write_hang;
> + int need_reset;
> + long open_handle_count;
> +
> +};
> +
> +/**
> + * read_heci_register - Read a byte from the heci device
> + *
> + * @dev: the device structure
> + * @offset: offset from which to read the data
> + *
> + * returns the byte read.
> + */
> +static inline __u32 read_heci_register(struct iamt_heci_device *dev,
> + unsigned long offset)
> +{
> + return readl(dev->mem_addr + offset);
> +}
> +
> +/**
> + * write_heci_register - Write 4 bytes to the heci device
> + *
> + * @dev: the device structure
> + * @offset: offset from which to write the data
> + * @value: the byte to write
> + */
> +static inline void write_heci_register(struct iamt_heci_device *dev,
> + unsigned long offset, __u32 value)
> +{
> + writel(value, dev->mem_addr + offset);
> +}
> +
> +#endif /* _HECI_DATA_STRUCTURES_H_ */
> diff --git a/drivers/char/heci/heci_init.c b/drivers/char/heci/heci_init.c
> new file mode 100644
> index 0000000..bdd9180
> --- /dev/null
> +++ b/drivers/char/heci/heci_init.c
> @@ -0,0 +1,1077 @@
> +/*
> + * Part of Intel(R) Manageability Engine Interface Linux driver
> + *
> + * Copyright (c) 2003 - 2008 Intel Corp.
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + * 1. Redistributions of source code must retain the above copyright
> + * notice, this list of conditions, and the following disclaimer,
> + * without modification.
> + * 2. Redistributions in binary form must reproduce at minimum a disclaimer
> + * substantially similar to the "NO WARRANTY" disclaimer below
> + * ("Disclaimer") and any redistribution must be conditioned upon
> + * including a substantially similar Disclaimer requirement for further
> + * binary redistribution.
> + * 3. Neither the names of the above-listed copyright holders nor the names
> + * of any contributors may be used to endorse or promote products derived
> + * from this software without specific prior written permission.
> + *
> + * Alternatively, this software may be distributed under the terms of the
> + * GNU General Public License ("GPL") version 2 as published by the Free
> + * Software Foundation.
> + *
> + * NO WARRANTY
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
> + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
> + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
> + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> + * POSSIBILITY OF SUCH DAMAGES.
> + *
> + */
> +
> +#include <linux/module.h>
> +#include <linux/pci.h>
> +#include <linux/reboot.h>
> +#include <linux/poll.h>
> +#include <linux/init.h>
> +#include <linux/kdev_t.h>
> +#include <linux/moduleparam.h>
> +#include <linux/wait.h>
> +#include <linux/delay.h>
> +#include <linux/kthread.h>
> +
> +#include "heci_data_structures.h"
> +#include "heci_interface.h"
> +#include "heci.h"
> +
> +
> +const __u8 heci_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 };
> +const __u8 heci_stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10 };
> +
> +const __u8 heci_wd_state_independence_msg[3][4] = {
> + {0x05, 0x02, 0x51, 0x10},
> + {0x05, 0x02, 0x52, 0x10},
> + {0x07, 0x02, 0x01, 0x10}
> +};
> +
> +const struct guid heci_asf_guid = {
> + 0x75B30CD6, 0xA29E, 0x4AF7,
> + {0xA7, 0x12, 0xE6, 0x17, 0x43, 0x93, 0xC8, 0xA6}
> +};
This can have static scope.
(Please check the whole driver for needlessly-global symbols)
> +const struct guid heci_wd_guid = {
> + 0x05B79A6F, 0x4628, 0x4D7F,
> + {0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB}
> +};
> +const struct guid heci_pthi_guid = {
> + 0x12f80028, 0xb4b7, 0x4b2d,
> + {0xac, 0xa8, 0x46, 0xe0, 0xff, 0x65, 0x81, 0x4c}
> +};
> +
> +
> +/*
> + * heci init function prototypes
> + */
> +static void heci_check_asf_mode(struct iamt_heci_device *dev);
> +static int host_start_message(struct iamt_heci_device *dev);
> +static int host_enum_clients_message(struct iamt_heci_device *dev);
> +static int allocate_me_clients_storage(struct iamt_heci_device *dev);
> +static void host_init_wd(struct iamt_heci_device *dev);
> +static void host_init_iamthif(struct iamt_heci_device *dev);
> +static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
> + long timeout);
> +
> +
> +/**
> + * heci_initialize_list - Sets up a queue list.
> + *
> + * @list: An instance of our list structure
> + * @dev: Device object for our driver
> + */
> +void heci_initialize_list(struct io_heci_list *list,
> + struct iamt_heci_device *dev)
> +{
> + /* initialize our queue list */
> + INIT_LIST_HEAD(&list->heci_cb.cb_list);
> + list->status = 0;
> + list->device_extension = dev;
> +}
> +
> +/**
> + * heci_flush_queues - flush our queues list belong to file_ext.
> + *
> + * @dev: Device object for our driver
> + * @file_ext: private data of the file object
> + */
> +void heci_flush_queues(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> + int i;
> +
> + if (!dev || !file_ext)
> + return;
> +
> + /* flush our queue list belong to file_ext */
> + for (i = 0; i < HECI_IO_LISTS_NUMBER; i++) {
> + DBG("remove list entry belong to file_ext\n");
> + heci_flush_list(dev->io_list_array[i], file_ext);
> + }
> +}
> +
> +
> +/**
> + * heci_flush_list - remove list entry belong to file_ext.
> + *
> + * @list: An instance of our list structure
> + * @file_ext: private data of the file object
Part of this function's interface is most definitely "must be called
under device_lock". That's just as worthy of documentation as the
formal argument. Unfortunately the kernel-doc system fails to
formalise this sort of thing.
One way of firmly documenting this is assert_spin_locked(). Your call.
> + */
> +void heci_flush_list(struct io_heci_list *list,
> + struct heci_file_private *file_ext)
> +{
> + struct heci_file_private *file_ext_tmp;
> + struct heci_cb_private *priv_cb_pos = NULL;
> + struct heci_cb_private *priv_cb_next = NULL;
> +
> + if (!list || !file_ext)
> + return;
Can this happen?
> + if (list->status != 0)
> + return;
> +
> + if (list_empty(&list->heci_cb.cb_list))
> + return;
> +
> + list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
> + &list->heci_cb.cb_list, cb_list) {
> + if (priv_cb_pos) {
> + file_ext_tmp = (struct heci_file_private *)
> + priv_cb_pos->file_private;
> + if (file_ext_tmp) {
> + if (heci_fe_same_id(file_ext, file_ext_tmp))
> + list_del(&priv_cb_pos->cb_list);
> + }
> + }
> + }
> +}
> +
> +/**
> + * heci_reset_iamthif_params - initializes heci device iamthif
> + *
> + * @dev: The heci device structure
> + */
> +static void heci_reset_iamthif_params(struct iamt_heci_device *dev)
> +{
> + /* reset iamthif parameters. */
> + dev->iamthif_current_cb = NULL;
> + dev->iamthif_msg_buf_size = 0;
> + dev->iamthif_msg_buf_index = 0;
> + dev->iamthif_canceled = 0;
> + dev->iamthif_file_ext.file = NULL;
> + dev->iamthif_ioctl = 0;
> + dev->iamthif_state = HECI_IAMTHIF_IDLE;
> + dev->iamthif_timer = 0;
> +}
It is unusual for a driver to unconditionally zap lots of per-device
fields like this during normal operation.
> +/**
> + * init_heci_device - allocates and initializes the heci device structure
> + *
> + * @pdev: The pci device structure
> + *
> + * returns The heci_device_device pointer on success, NULL on failure.
> + */
> +struct iamt_heci_device *init_heci_device(struct pci_dev *pdev)
> +{
> + int i;
> + struct iamt_heci_device *dev;
> +
> + dev = kzalloc(sizeof(struct iamt_heci_device), GFP_KERNEL);
> + if (!dev)
> + return NULL;
> +
> + /* setup our list array */
> + dev->io_list_array[0] = &dev->read_list;
> + dev->io_list_array[1] = &dev->write_list;
> + dev->io_list_array[2] = &dev->write_waiting_list;
> + dev->io_list_array[3] = &dev->ctrl_wr_list;
> + dev->io_list_array[4] = &dev->ctrl_rd_list;
> + dev->io_list_array[5] = &dev->pthi_cmd_list;
> + dev->io_list_array[6] = &dev->pthi_read_complete_list;
> + INIT_LIST_HEAD(&dev->file_list);
> + INIT_LIST_HEAD(&dev->wd_file_ext.link);
> + INIT_LIST_HEAD(&dev->iamthif_file_ext.link);
> + spin_lock_init(&dev->device_lock);
> + init_waitqueue_head(&dev->wait_recvd_msg);
> + init_waitqueue_head(&dev->wait_stop_wd);
> + dev->heci_state = HECI_INITIALIZING;
> + dev->iamthif_state = HECI_IAMTHIF_IDLE;
> +
> + /* init work for schedule work */
> + INIT_WORK(&dev->work, NULL);
> + for (i = 0; i < HECI_IO_LISTS_NUMBER; i++)
> + heci_initialize_list(dev->io_list_array[i], dev);
> + dev->pdev = pdev;
> + return dev;
> +}
> +
> +
> +
> +
Various stray newlines..
> +static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
> + long timeout)
> +{
> + return wait_event_interruptible_timeout(dev->wait_recvd_msg,
> + (dev->recvd_msg), timeout);
> +}
See above comments regarding *_interruptible* dangers.
> +/**
> + * heci_hw_init - init host and fw to start work.
> + *
> + * @dev: Device object for our driver
> + *
> + * returns 0 on success, <0 on failure.
> + */
> +int heci_hw_init(struct iamt_heci_device *dev)
> +{
> + int err = 0;
> +
> + dev->host_hw_state = read_heci_register(dev, H_CSR);
> + dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
> + DBG("host_hw_state = 0x%08x, mestate = 0x%08x.\n",
> + dev->host_hw_state, dev->me_hw_state);
> +
> + if ((dev->host_hw_state & H_IS) == H_IS) {
> + /* acknowledge interrupt and stop interupts */
> + heci_set_csr_register(dev);
> + }
> + dev->recvd_msg = 0;
> + DBG("reset in start the heci device.\n");
> +
> + heci_reset(dev, 1);
> +
> + DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
> + dev->host_hw_state, dev->me_hw_state);
> +
> + /* wait for ME to turn on ME_RDY */
> + if (!dev->recvd_msg)
> + err = heci_wait_event_int_timeout(dev, HECI_INTEROP_TIMEOUT);
> +
> + if (!err && !dev->recvd_msg) {
> + dev->heci_state = HECI_DISABLED;
> + DBG("wait_event_interruptible_timeout failed"
> + "on wait for ME to turn on ME_RDY.\n");
> + return -ENODEV;
> + } else {
> + if (!(((dev->host_hw_state & H_RDY) == H_RDY)
> + && ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) {
> + dev->heci_state = HECI_DISABLED;
> + DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
> + dev->host_hw_state,
> + dev->me_hw_state);
> +
> + if (!(dev->host_hw_state & H_RDY) != H_RDY)
> + DBG("host turn off H_RDY.\n");
> +
> + if (!(dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
> + DBG("ME turn off ME_RDY.\n");
> +
> + printk(KERN_ERR
> + "heci: link layer initialization failed.\n");
> + return -ENODEV;
> + }
> + }
If heci_wait_event_int_timeout() got terminated due to a pending
signal, this code drops that information on the floor.
heci_wait_event_int_timeout() will have returned before
that-which-it-was-waiting-for has happened, and I suspect that bad
things will happen.
Please check the signal_pending() behaviour in here, and try to runtime
test it.
The same goes for all foo_interruptible code sites in this driver. It
is a dangerous function call to be used in a driver. Few people will
remember to test the it-returned-early-due-to-signal_pending case.
> + dev->recvd_msg = 0;
> + DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
> + dev->host_hw_state, dev->me_hw_state);
> + DBG("ME turn on ME_RDY and host turn on H_RDY.\n");
> + printk(KERN_INFO "heci: link layer has been established.\n");
> + return 0;
> +}
> +
> +/**
> + * heci_hw_reset - reset fw via heci csr register.
> + *
> + * @dev: Device object for our driver
> + * @interrupts: if interrupt should be enable after reset.
> + */
> +static void heci_hw_reset(struct iamt_heci_device *dev, int interrupts)
> +{
> + dev->host_hw_state |= (H_RST | H_IG);
> +
> + if (interrupts)
> + heci_csr_enable_interrupts(dev);
> + else
> + heci_csr_disable_interrupts(dev);
> +
> + BUG_ON((dev->host_hw_state & H_RST) != H_RST);
> + BUG_ON((dev->host_hw_state & H_RDY) != 0);
> +}
> +
> +/**
> + * heci_reset - reset host and fw.
> + *
> + * @dev: Device object for our driver
> + * @interrupts: if interrupt should be enable after reset.
"Called under spin_lock_bh(device_lock)"
> + */
> +void heci_reset(struct iamt_heci_device *dev, int interrupts)
> +{
> + struct heci_file_private *file_pos = NULL;
> + struct heci_file_private *file_next = NULL;
> + struct heci_cb_private *priv_cb_pos = NULL;
> + struct heci_cb_private *priv_cb_next = NULL;
> + int unexpected = 0;
> +
> + if (dev->heci_state == HECI_RECOVERING_FROM_RESET) {
> + dev->need_reset = 1;
> + return;
> + }
> +
> + if (dev->heci_state != HECI_INITIALIZING &&
> + dev->heci_state != HECI_DISABLED &&
> + dev->heci_state != HECI_POWER_DOWN &&
> + dev->heci_state != HECI_POWER_UP)
> + unexpected = 1;
> +
> + if (dev->reinit_tsk != NULL) {
> + kthread_stop(dev->reinit_tsk);
kthread_stop() can sleep, hence cannnot be called from under spinlock.
> + dev->reinit_tsk = NULL;
> + }
> +
> + dev->host_hw_state = read_heci_register(dev, H_CSR);
> +
> + DBG("before reset host_hw_state = 0x%08x.\n",
> + dev->host_hw_state);
> +
> + heci_hw_reset(dev, interrupts);
> +
> + dev->host_hw_state &= ~H_RST;
> + dev->host_hw_state |= H_IG;
> +
> + write_heci_register(dev, H_CSR, dev->host_hw_state);
> +
> + DBG("currently saved host_hw_state = 0x%08x.\n",
> + dev->host_hw_state);
> +
> + dev->need_reset = 0;
> +
> + if (dev->heci_state != HECI_INITIALIZING) {
> + if ((dev->heci_state != HECI_DISABLED) &&
> + (dev->heci_state != HECI_POWER_DOWN))
> + dev->heci_state = HECI_RESETING;
> +
> + list_for_each_entry_safe(file_pos,
> + file_next, &dev->file_list, link) {
> + file_pos->state = HECI_FILE_DISCONNECTED;
> + file_pos->flow_ctrl_creds = 0;
> + file_pos->read_cb = NULL;
> + file_pos->timer_count = 0;
> + }
> + /* remove entry if already in list */
> + DBG("list del iamthif and wd file list.\n");
> + heci_remove_client_from_file_list(dev,
> + dev->wd_file_ext.host_client_id);
> +
> + heci_remove_client_from_file_list(dev,
> + dev->iamthif_file_ext.host_client_id);
> +
> + heci_reset_iamthif_params(dev);
> + dev->wd_due_counter = 0;
> + dev->extra_write_index = 0;
> + }
> +
> + dev->num_heci_me_clients = 0;
> + dev->rd_msg_hdr = 0;
> + dev->stop = 0;
> + dev->wd_pending = 0;
> +
> + /* update the state of the registers after reset */
> + dev->host_hw_state = read_heci_register(dev, H_CSR);
> + dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
> +
> + DBG("after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
> + dev->host_hw_state, dev->me_hw_state);
> +
> + if (unexpected)
> + printk(KERN_WARNING "heci: unexpected reset.\n");
> +
> + /* Wake up all readings so they can be interrupted */
> + list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
> + if (&file_pos->rx_wait &&
> + waitqueue_active(&file_pos->rx_wait)) {
The use of waitqueue_active() has well-known races, only I forget the
details. Barrier-related, iirc. Nick Piggin might recall the details.
We should have added a comment to waitqueue_active().
> + printk(KERN_INFO "heci: Waking up client!\n");
> + wake_up_interruptible(&file_pos->rx_wait);
> + }
> + }
> + /* remove all waiting requests */
> + if (dev->write_list.status == 0 &&
> + !list_empty(&dev->write_list.heci_cb.cb_list)) {
> + list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
> + &dev->write_list.heci_cb.cb_list, cb_list) {
> + if (priv_cb_pos) {
> + list_del(&priv_cb_pos->cb_list);
> + heci_free_cb_private(priv_cb_pos);
> + }
> + }
> + }
> +}
> +
> +/**
> + * heci_initialize_clients - heci communication initialization.
> + *
> + * @dev: Device object for our driver
> + */
> +int heci_initialize_clients(struct iamt_heci_device *dev)
> +{
> + int status;
> +
> + msleep(100); /* FW needs time to be ready to talk with us */
> + DBG("link is established start sending messages.\n");
> + /* link is established start sending messages. */
> + status = host_start_message(dev);
> + if (status != 0) {
> + spin_lock_bh(&dev->device_lock);
> + dev->heci_state = HECI_DISABLED;
> + spin_unlock_bh(&dev->device_lock);
> + DBG("start sending messages failed.\n");
> + return status;
> + }
> +
> + /* enumerate clients */
> + status = host_enum_clients_message(dev);
> + if (status != 0) {
> + spin_lock_bh(&dev->device_lock);
> + dev->heci_state = HECI_DISABLED;
> + spin_unlock_bh(&dev->device_lock);
> + DBG("enum clients failed.\n");
> + return status;
> + }
> + /* allocate storage for ME clients representation */
> + status = allocate_me_clients_storage(dev);
> + if (status != 0) {
> + spin_lock_bh(&dev->device_lock);
> + dev->num_heci_me_clients = 0;
> + dev->heci_state = HECI_DISABLED;
> + spin_unlock_bh(&dev->device_lock);
> + DBG("allocate clients failed.\n");
> + return status;
> + }
> +
> + heci_check_asf_mode(dev);
> + /* heci watchdog initialization */
> + host_init_wd(dev);
> + /* heci iamthif client initialization */
> + host_init_iamthif(dev);
> +
> + spin_lock_bh(&dev->device_lock);
> + if (dev->need_reset) {
> + dev->need_reset = 0;
> + dev->heci_state = HECI_DISABLED;
> + spin_unlock_bh(&dev->device_lock);
> + return -ENODEV;
I'm surprised that we can just retrun here without having to release
any resources.
> + }
> +
> + memset(dev->heci_host_clients, 0, sizeof(dev->heci_host_clients));
I suspect this memset wasn't needed.
> + dev->open_handle_count = 0;
> + dev->heci_host_clients[0] |= 7;
Mysterious.
> + dev->current_host_client_id = 3;
> + dev->heci_state = HECI_ENABLED;
> + spin_unlock_bh(&dev->device_lock);
> + DBG("initialization heci clients successful.\n");
> + return 0;
> +}
> +
> +/**
> + * heci_task_initialize_clients - heci reinitialization task
> + *
> + * @data: Device object for our driver
> + */
> +int heci_task_initialize_clients(void *data)
> +{
> + int ret;
> + struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
Unneeded and undesirable cast of void*.
> + spin_lock_bh(&dev->device_lock);
> + if (dev->reinit_tsk != NULL) {
> + spin_unlock_bh(&dev->device_lock);
> + DBG("reinit task already started.\n");
> + return 0;
> + }
> + dev->reinit_tsk = current;
> + current->flags |= PF_NOFREEZE;
A manipulation such as this must have a comment. Because there's
really no way in whcih the reader of the code can work out why it is
there.
And a driver shouldn't be accessing PF_NOFREEZE directly. There are
various interfaces in freezer.h whcih should be used instead (I forget
which one - it has changed a few times).
> + spin_unlock_bh(&dev->device_lock);
> +
> + ret = heci_initialize_clients(dev);
> +
> + spin_lock_bh(&dev->device_lock);
> + dev->reinit_tsk = NULL;
> + spin_unlock_bh(&dev->device_lock);
This looks racy. It could at least do
if (dev->reinit_tsk == current)
dev->reinit_tsk = NULL;
but it all still seems a bit dodgy. Perhaps reinit_tsk should be
protected by a sleeping lock (ie: a mutex).
> + return ret;
> +}
> +
> +/**
> + * host_start_message - heci host send start message.
> + *
> + * @dev: Device object for our driver
> + *
> + * returns 0 on success, <0 on failure.
> + */
> +static int host_start_message(struct iamt_heci_device *dev)
> +{
> + long timeout = 60; /* 60 second */
> +
> + struct heci_msg_hdr *heci_hdr;
> + struct hbm_host_version_request *host_start_req;
> + struct hbm_host_stop_request *host_stop_req;
> + int err = 0;
> +
> + /* host start message */
> + heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
COuld we make this code cleaner and more typesafe by defining
wr_msg_buf as a union of heci_msg_hdr, hbm_cmd, etc?
> + heci_hdr->host_addr = 0;
> + heci_hdr->me_addr = 0;
> + heci_hdr->length = sizeof(struct hbm_host_version_request);
> + heci_hdr->msg_complete = 1;
> + heci_hdr->reserved = 0;
> +
> + host_start_req =
> + (struct hbm_host_version_request *) &dev->wr_msg_buf[1];
> + memset(host_start_req, 0, sizeof(struct hbm_host_version_request));
> + host_start_req->cmd.cmd = HOST_START_REQ_CMD;
> + host_start_req->host_version.major_version = HBM_MAJOR_VERSION;
> + host_start_req->host_version.minor_version = HBM_MINOR_VERSION;
> + dev->recvd_msg = 0;
> + if (!heci_write_message(dev, heci_hdr,
> + (unsigned char *) (host_start_req),
Maybe heci_write_message() should take a void*.
> + heci_hdr->length)) {
> + DBG("send version to fw fail.\n");
> + return -ENODEV;
> + }
> + DBG("call wait_event_interruptible_timeout for response message.\n");
> + /* wait for response */
> + err = heci_wait_event_int_timeout(dev, timeout * HZ);
> + if (!err && !dev->recvd_msg) {
> + DBG("wait_timeout failed on host start response message.\n");
> + return -ENODEV;
> + }
> + dev->recvd_msg = 0;
> + DBG("wait_timeout successful on host start response message.\n");
> + if ((dev->version.major_version != HBM_MAJOR_VERSION) ||
> + (dev->version.minor_version != HBM_MINOR_VERSION)) {
> + /* send stop message */
> + heci_hdr->host_addr = 0;
> + heci_hdr->me_addr = 0;
> + heci_hdr->length = sizeof(struct hbm_host_stop_request);
> + heci_hdr->msg_complete = 1;
> + heci_hdr->reserved = 0;
> +
> + host_stop_req =
> + (struct hbm_host_stop_request *) &dev->wr_msg_buf[1];
> +
> + memset(host_stop_req, 0, sizeof(struct hbm_host_stop_request));
> + host_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
> + host_stop_req->reason = DRIVER_STOP_REQUEST;
> + heci_write_message(dev, heci_hdr,
> + (unsigned char *) (host_stop_req),
> + heci_hdr->length);
> + DBG("version mismatch.\n");
> + return -ENODEV;
> + }
> +
> + return 0;
> +}
> +
> +/**
> + * host_enum_clients_message - host send enumeration client request message.
> + *
> + * @dev: Device object for our driver
> + *
> + * returns 0 on success, <0 on failure.
> + */
> +static int host_enum_clients_message(struct iamt_heci_device *dev)
> +{
> + long timeout = 5; /*5 second */
> + struct heci_msg_hdr *heci_hdr;
> + struct hbm_host_enum_request *host_enum_req;
> + int err = 0;
> + int i, j;
> +
> + heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
> + /* enumerate clients */
> + heci_hdr->host_addr = 0;
> + heci_hdr->me_addr = 0;
> + heci_hdr->length = sizeof(struct hbm_host_enum_request);
> + heci_hdr->msg_complete = 1;
> + heci_hdr->reserved = 0;
> +
> + host_enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1];
> + memset(host_enum_req, 0, sizeof(struct hbm_host_enum_request));
> + host_enum_req->cmd.cmd = HOST_ENUM_REQ_CMD;
> + if (!heci_write_message(dev, heci_hdr,
> + (unsigned char *) (host_enum_req),
> + heci_hdr->length)) {
> + DBG("send enumeration request failed.\n");
> + return -ENODEV;
> + }
> + /* wait for response */
> + dev->recvd_msg = 0;
> + err = heci_wait_event_int_timeout(dev, timeout * HZ);
> + if (!err && !dev->recvd_msg) {
> + DBG("wait_event_interruptible_timeout failed "
> + "on enumeration clients response message.\n");
> + return -ENODEV;
> + }
> + dev->recvd_msg = 0;
> +
> + spin_lock_bh(&dev->device_lock);
> + /* count how many ME clients we have */
> + for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
> + for (j = 0; j < 8; j++) {
> + if ((dev->heci_me_clients[i] & (1 << j)) != 0)
> + dev->num_heci_me_clients++;
> +
> + }
> + }
> + spin_unlock_bh(&dev->device_lock);
> +
> + return 0;
> +}
There seems to be a bit of code duplication here.
> +/**
> + * host_client_properties - reads properties for client
> + *
> + * @dev: Device object for our driver
> + * @idx: client index in me client array
> + * @client_id: id of the client
> + *
> + * returns 0 on success, <0 on failure.
> + */
> +static int host_client_properties(struct iamt_heci_device *dev,
> + struct heci_me_client *client)
> +{
> + struct heci_msg_hdr *heci_hdr;
> + struct hbm_props_request *host_cli_req;
> + int err;
> +
> + heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
> + heci_hdr->host_addr = 0;
> + heci_hdr->me_addr = 0;
> + heci_hdr->length = sizeof(struct hbm_props_request);
> + heci_hdr->msg_complete = 1;
> + heci_hdr->reserved = 0;
> +
> + host_cli_req = (struct hbm_props_request *) &dev->wr_msg_buf[1];
> + memset(host_cli_req, 0, sizeof(struct hbm_props_request));
> + host_cli_req->cmd.cmd = HOST_CLIENT_PROPERTEIS_REQ_CMD;
> + host_cli_req->address = client->client_id;
> + if (!heci_write_message(dev, heci_hdr,
> + (unsigned char *) (host_cli_req),
> + heci_hdr->length)) {
> + DBG("send props request failed.\n");
> + return -ENODEV;
> + }
> + /* wait for response */
> + dev->recvd_msg = 0;
> + err = heci_wait_event_int_timeout(dev, 10 * HZ);
> + if (!err && !dev->recvd_msg) {
> + DBG("wait failed on props resp msg.\n");
> + return -ENODEV;
> + }
> + dev->recvd_msg = 0;
> + return 0;
> +}
> +
> +/**
> + * allocate_me_clients_storage - allocate storage for me clients
> + *
> + * @dev: Device object for our driver
> + *
> + * returns 0 on success, <0 on failure.
> + */
> +static int allocate_me_clients_storage(struct iamt_heci_device *dev)
> +{
> + struct heci_me_client *clients;
> + struct heci_me_client *client;
> + __u8 num, i, j;
> + int err;
> +
> + if (dev->num_heci_me_clients <= 0)
> + return 0;
Can this happen?
flow_ctrl_creds() test for num_heci_me_clients == 0, whereas this code
also tests for num_heci_me_clients<0. Which one is correct?
> + spin_lock_bh(&dev->device_lock);
> + kfree(dev->me_clients);
> + dev->me_clients = NULL;
> + spin_unlock_bh(&dev->device_lock);
> +
> + /* allocate storage for ME clients representation */
> + clients = kcalloc(dev->num_heci_me_clients,
> + sizeof(struct heci_me_client), GFP_KERNEL);
> + if (!clients) {
> + DBG("memory allocation for ME clients failed.\n");
> + return -ENOMEM;
> + }
> +
> + spin_lock_bh(&dev->device_lock);
> + dev->me_clients = clients;
> + spin_unlock_bh(&dev->device_lock);
Strange locking. Shouldn't we at least check to see whether some other
thread has just initialised dev->me_clients?
If that is not possible, then why is the locking needed at all?
> + num = 0;
> + for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
> + for (j = 0; j < 8; j++) {
> + if ((dev->heci_me_clients[i] & (1 << j)) != 0) {
> + client = &dev->me_clients[num];
> + client->client_id = (i * 8) + j;
> + client->flow_ctrl_creds = 0;
> + err = host_client_properties(dev, client);
> + if (err != 0) {
> + spin_lock_bh(&dev->device_lock);
> + kfree(dev->me_clients);
> + dev->me_clients = NULL;
> + spin_unlock_bh(&dev->device_lock);
dittoes all over the place.
> + return err;
> + }
> + num++;
> + }
> + }
> + }
> +
> + return 0;
> +}
> +
> +/**
> + * heci_init_file_private - initializes private file structure.
> + *
> + * @priv: private file structure to be initialized
> + * @file: the file structure
> + */
> +static void heci_init_file_private(struct heci_file_private *priv,
> + struct file *file)
> +{
> + memset(priv, 0, sizeof(struct heci_file_private));
> + spin_lock_init(&priv->file_lock);
> + spin_lock_init(&priv->read_io_lock);
> + spin_lock_init(&priv->write_io_lock);
> + init_waitqueue_head(&priv->wait);
> + init_waitqueue_head(&priv->rx_wait);
> + DBG("priv->rx_wait =%p\n", &priv->rx_wait);
> + init_waitqueue_head(&priv->tx_wait);
> + INIT_LIST_HEAD(&priv->link);
> + priv->reading_state = HECI_IDLE;
> + priv->writing_state = HECI_IDLE;
> +}
> +
> +/**
> + * heci_find_me_client - search for ME client guid
> + * sets client_id in heci_file_private if found
> + * @dev: Device object for our driver
> + * @priv: private file structure to set client_id in
> + * @cguid: searched guid of ME client
> + * @client_id: id of host client to be set in file private structure
> + *
> + * returns ME client index
> + */
> +static __u8 heci_find_me_client(struct iamt_heci_device *dev,
> + struct heci_file_private *priv,
> + const struct guid *cguid, __u8 client_id)
> +{
> + __u8 i;
> +
> + if ((dev == NULL) || (priv == NULL) || (cguid == NULL))
> + return 0;
Can these all happen?
> + for (i = 0; i < dev->num_heci_me_clients; i++) {
> + if (memcmp(cguid,
> + &dev->me_clients[i].props.protocol_name,
> + sizeof(struct guid)) == 0) {
> + priv->me_client_id = dev->me_clients[i].client_id;
> + priv->state = HECI_FILE_CONNECTING;
> + priv->host_client_id = client_id;
> +
> + list_add_tail(&priv->link, &dev->file_list);
> + return i;
> + }
> + }
> + return 0;
> +}
> +
> +/**
> + * heci_check_asf_mode - check for ASF client
> + *
> + * @dev: Device object for our driver
> + */
> +static void heci_check_asf_mode(struct iamt_heci_device *dev)
> +{
> + __u8 i;
> +
> + spin_lock_bh(&dev->device_lock);
> + dev->asf_mode = 0;
> + /* find ME ASF client - otherwise assume AMT mode */
> + DBG("find ME ASF client - otherwise assume AMT mode.\n");
> + for (i = 0; i < dev->num_heci_me_clients; i++) {
> + if (memcmp(&heci_asf_guid,
> + &dev->me_clients[i].props.protocol_name,
> + sizeof(struct guid)) == 0) {
> + dev->asf_mode = 1;
> + spin_unlock_bh(&dev->device_lock);
> + DBG("found ME ASF client.\n");
> + return;
> + }
> + }
> + spin_unlock_bh(&dev->device_lock);
> + DBG("assume AMT mode.\n");
> +}
> +
> +/**
> + * heci_connect_me_client - connect ME client
> + * @dev: Device object for our driver
> + * @priv: private file structure
> + * @timeout: connect timeout in seconds
> + *
> + * returns 1 - if connected, 0 - if not
> + */
> +static __u8 heci_connect_me_client(struct iamt_heci_device *dev,
> + struct heci_file_private *priv,
> + long timeout)
> +{
> + int err = 0;
> +
> + if ((dev == NULL) || (priv == NULL))
> + return 0;
That's a bit excessively parenthesised.
Can these things happen?
> + if (!heci_connect(dev, priv)) {
> + DBG("failed to call heci_connect for client_id=%d.\n",
> + priv->host_client_id);
> + spin_lock_bh(&dev->device_lock);
> + heci_remove_client_from_file_list(dev, priv->host_client_id);
> + priv->state = HECI_FILE_DISCONNECTED;
> + spin_unlock_bh(&dev->device_lock);
> + return 0;
> + }
> +
> + err = wait_event_timeout(dev->wait_recvd_msg,
> + (HECI_FILE_CONNECTED == priv->state ||
> + HECI_FILE_DISCONNECTED == priv->state),
> + timeout * HZ);
> + if (HECI_FILE_CONNECTED != priv->state) {
> + spin_lock_bh(&dev->device_lock);
> + heci_remove_client_from_file_list(dev, priv->host_client_id);
> + DBG("failed to connect client_id=%d state=%d.\n",
> + priv->host_client_id, priv->state);
> + if (err)
> + DBG("failed connect err=%08x\n", err);
> + priv->state = HECI_FILE_DISCONNECTED;
> + spin_unlock_bh(&dev->device_lock);
> + return 0;
> + }
> + DBG("successfully connected client_id=%d.\n",
> + priv->host_client_id);
> + return 1;
> +}
> +
> +/**
> + * host_init_wd - heci initialization wd.
> + *
> + * @dev: Device object for our driver
> + */
> +static void host_init_wd(struct iamt_heci_device *dev)
> +{
> + spin_lock_bh(&dev->device_lock);
> +
> + heci_init_file_private(&dev->wd_file_ext, NULL);
> +
> + /* look for WD client and connect to it */
> + dev->wd_file_ext.state = HECI_FILE_DISCONNECTED;
> + dev->wd_timeout = 0;
> +
> + if (dev->asf_mode) {
> + memcpy(dev->wd_data, heci_stop_wd_params, HECI_WD_PARAMS_SIZE);
> + } else {
> + /* AMT mode */
> + dev->wd_timeout = AMT_WD_VALUE;
> + DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
> + memcpy(dev->wd_data, heci_start_wd_params, HECI_WD_PARAMS_SIZE);
> + memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
> + &dev->wd_timeout, sizeof(__u16));
> + }
> +
> + /* find ME WD client */
> + heci_find_me_client(dev, &dev->wd_file_ext,
> + &heci_wd_guid, HECI_WD_HOST_CLIENT_ID);
> + spin_unlock_bh(&dev->device_lock);
> +
> + DBG("check wd_file_ext\n");
> + if (HECI_FILE_CONNECTING == dev->wd_file_ext.state) {
> + if (heci_connect_me_client(dev, &dev->wd_file_ext, 15) == 1) {
> + DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
> + if (dev->wd_timeout != 0)
> + dev->wd_due_counter = 1;
> + else
> + dev->wd_due_counter = 0;
> + DBG("successfully connected to WD client.\n");
> + }
> + } else
> + DBG("failed to find WD client.\n");
> +
> +
> + spin_lock_bh(&dev->device_lock);
> + dev->wd_timer.function = &heci_wd_timer;
> + dev->wd_timer.data = (unsigned long) dev;
> + spin_unlock_bh(&dev->device_lock);
Use setup_timer().
Note that setup_timer() does init_timer(), but we already have an
init_timer(dev->wd_timer) elsewhere. Please sort that out.
The taking of device_lock here surely is unneeded.
> +}
> +
> +
> +/**
> + * host_init_iamthif - heci initialization iamthif client.
> + *
> + * @dev: Device object for our driver
> + *
> + */
> +static void host_init_iamthif(struct iamt_heci_device *dev)
> +{
> + __u8 i;
> +
> + spin_lock_bh(&dev->device_lock);
> +
> + heci_init_file_private(&dev->iamthif_file_ext, NULL);
> + dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTED;
> +
> + /* find ME PTHI client */
> + i = heci_find_me_client(dev, &dev->iamthif_file_ext,
> + &heci_pthi_guid, HECI_IAMTHIF_HOST_CLIENT_ID);
> + if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTING) {
> + DBG("failed to find iamthif client.\n");
> + spin_unlock_bh(&dev->device_lock);
> + return;
> + }
> +
> + BUG_ON(dev->me_clients[i].props.max_msg_length != IAMTHIF_MTU);
> +
> + spin_unlock_bh(&dev->device_lock);
> + if (heci_connect_me_client(dev, &dev->iamthif_file_ext, 15) == 1) {
> + DBG("connected to iamthif client.\n");
> + dev->iamthif_state = HECI_IAMTHIF_IDLE;
> + }
> +}
> +
> +/**
> + * heci_alloc_file_private - allocates a private file structure and set it up.
> + * @file: the file structure
> + *
> + * returns The allocated file or NULL on failure
> + */
> +struct heci_file_private *heci_alloc_file_private(struct file *file)
> +{
> + struct heci_file_private *priv;
> +
> + priv = kmalloc(sizeof(struct heci_file_private), GFP_KERNEL);
> + if (!priv)
> + return NULL;
> +
> + heci_init_file_private(priv, file);
> +
> + return priv;
> +}
> +
> +
> +
stray newlines
> +/**
> + * heci_disconnect_host_client - send disconnect message to fw from host client.
stray double-space.
> + *
> + * @dev: Device object for our driver
> + * @file_ext: private data of the file object
> + *
> + * returns 0 on success, <0 on failure.
> + */
> +int heci_disconnect_host_client(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> + int rets, err;
> + long timeout = 15; /* 15 seconds */
> + struct heci_cb_private *priv_cb;
> +
> + if ((!dev) || (!file_ext))
> + return -ENODEV;
Can these happen?
Excessively parenthesised.
(Please review this in the many other similar places)
> + if (file_ext->state != HECI_FILE_DISCONNECTING)
> + return 0;
> +
> + priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
> + if (!priv_cb)
> + return -ENOMEM;
> +
> + INIT_LIST_HEAD(&priv_cb->cb_list);
> + priv_cb->file_private = file_ext;
> + priv_cb->major_file_operations = HECI_CLOSE;
> + spin_lock_bh(&dev->device_lock);
> + if (dev->host_buffer_is_empty) {
> + dev->host_buffer_is_empty = 0;
> + if (heci_disconnect(dev, file_ext)) {
> + list_add_tail(&priv_cb->cb_list,
> + &dev->ctrl_rd_list.heci_cb.cb_list);
> + } else {
> + spin_unlock_bh(&dev->device_lock);
> + rets = -ENODEV;
> + DBG("failed to call heci_disconnect.\n");
> + goto free;
This will return with dev->host_buffer_is_empty = 0. Is that correct?
> + }
> + } else {
> + DBG("add disconnect cb to control write list\n");
> + list_add_tail(&priv_cb->cb_list,
> + &dev->ctrl_wr_list.heci_cb.cb_list);
> + }
> + spin_unlock_bh(&dev->device_lock);
> +
> + err = wait_event_timeout(dev->wait_recvd_msg,
> + (HECI_FILE_DISCONNECTED == file_ext->state),
> + timeout * HZ);
> + if (HECI_FILE_DISCONNECTED == file_ext->state) {
> + rets = 0;
> + DBG("successfully disconnected from fw client.\n");
> + } else {
> + rets = -ENODEV;
> + if (HECI_FILE_DISCONNECTED != file_ext->state)
> + DBG("wrong status client disconnect.\n");
> +
> + if (err)
> + DBG("wait failed disconnect err=%08x\n", err);
> +
> + DBG("failed to disconnect from fw client.\n");
> + }
> +
> + spin_lock_bh(&dev->device_lock);
> + heci_flush_list(&dev->ctrl_rd_list, file_ext);
> + heci_flush_list(&dev->ctrl_wr_list, file_ext);
> + spin_unlock_bh(&dev->device_lock);
> +free:
> + heci_free_cb_private(priv_cb);
> + return rets;
> +}
> +
> +/**
> + * heci_remove_client_from_file_list -
> + * remove file private data from device file list
> + *
> + * @dev: Device object for our driver
> + * @host_client_id: host client id to be removed
> + */
> +void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
> + __u8 host_client_id)
> +{
> + struct heci_file_private *file_pos = NULL;
> + struct heci_file_private *file_next = NULL;
> + list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
> + if (host_client_id == file_pos->host_client_id) {
> + DBG("remove host client = %d, ME client = %d\n",
> + file_pos->host_client_id,
> + file_pos->me_client_id);
> + list_del_init(&file_pos->link);
> + break;
> + }
> + }
> +}
> diff --git a/drivers/char/heci/heci_interface.c b/drivers/char/heci/heci_interface.c
> new file mode 100644
> index 0000000..c5f51a7
> --- /dev/null
> +++ b/drivers/char/heci/heci_interface.c
> @@ -0,0 +1,485 @@
> +/*
> + * Part of Intel(R) Manageability Engine Interface Linux driver
> + *
> + * Copyright (c) 2003 - 2008 Intel Corp.
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + * 1. Redistributions of source code must retain the above copyright
> + * notice, this list of conditions, and the following disclaimer,
> + * without modification.
> + * 2. Redistributions in binary form must reproduce at minimum a disclaimer
> + * substantially similar to the "NO WARRANTY" disclaimer below
> + * ("Disclaimer") and any redistribution must be conditioned upon
> + * including a substantially similar Disclaimer requirement for further
> + * binary redistribution.
> + * 3. Neither the names of the above-listed copyright holders nor the names
> + * of any contributors may be used to endorse or promote products derived
> + * from this software without specific prior written permission.
> + *
> + * Alternatively, this software may be distributed under the terms of the
> + * GNU General Public License ("GPL") version 2 as published by the Free
> + * Software Foundation.
> + *
> + * NO WARRANTY
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
> + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
> + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
> + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> + * POSSIBILITY OF SUCH DAMAGES.
> + *
> + */
> +
> +
> +#include "heci.h"
> +#include "heci_interface.h"
> +
> +
> +/**
> + * heci_set_csr_register - write H_CSR register to the heci device
> + *
> + * @dev: device object for our driver
> + */
> +void heci_set_csr_register(struct iamt_heci_device *dev)
> +{
> + write_heci_register(dev, H_CSR, dev->host_hw_state);
> + dev->host_hw_state = read_heci_register(dev, H_CSR);
> +}
> +
> +/**
> + * heci_csr_enable_interrupts - enable heci device interrupts
> + *
> + * @dev: device object for our driver
> + */
> +void heci_csr_enable_interrupts(struct iamt_heci_device *dev)
> +{
> + dev->host_hw_state |= H_IE;
> + heci_set_csr_register(dev);
> +}
> +
> +/**
> + * heci_csr_disable_interrupts - disable heci device interrupts
> + *
> + * @dev: device object for our driver
> + */
> +void heci_csr_disable_interrupts(struct iamt_heci_device *dev)
> +{
> + dev->host_hw_state &= ~H_IE;
> + heci_set_csr_register(dev);
> +}
> +
> +
> +/**
> + * _host_get_filled_slots - get number of device filled buffer slots
> + *
> + * @device: the device structure
> + *
> + * returns numer of filled slots
> + */
> +static unsigned char _host_get_filled_slots(const struct iamt_heci_device *dev)
> +{
> + char read_ptr, write_ptr;
> +
> + read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8);
> + write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16);
> +
> + return (unsigned char) (write_ptr - read_ptr);
> +}
hm, so this is implementing a ring buffer and the code itself
implicitly "knows" that the H_CBRP and H_CBWP masks span 0-255, so it
can use C char arithmetic.
That's a bit funky.
> +/**
> + * host_buffer_is_empty - check if host buffer is empty.
> + *
> + * @dev: device object for our driver
> + *
> + * returns 1 if empty, 0 - otherwise.
> + */
> +int host_buffer_is_empty(struct iamt_heci_device *dev)
> +{
> + unsigned char filled_slots;
> +
> + dev->host_hw_state = read_heci_register(dev, H_CSR);
> + filled_slots = _host_get_filled_slots(dev);
> +
> + if (filled_slots > 0)
> + return 0;
> +
> + return 1;
> +}
Seems strange that we have a device field called
"host_buffer_is_empty", and a helper function of the same name which
appears to have no relationship with that field.
host_buffer_is_empty() is a quite poorly-chosen name for a kenrel-wide
symbol.
> +/**
> + * count_empty_write_slots - count write empty slots.
> + *
> + * @dev: device object for our driver
> + *
> + * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise empty slots count
> + */
> +__s32 count_empty_write_slots(const struct iamt_heci_device *dev)
> +{
> + unsigned char buffer_depth, filled_slots, empty_slots;
> +
> + buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
More implict "we know that is an eight-bit-field" code.
> + filled_slots = _host_get_filled_slots(dev);
> + empty_slots = buffer_depth - filled_slots;
> +
> + if (filled_slots > buffer_depth) {
> + /* overflow */
> + return -ESLOTS_OVERFLOW;
> + }
> +
> + return (__s32) empty_slots;
> +}
Also an inappropriate name for a kernel-wide symbol.
Please review all the global symbols, ensure that they have a suitable
prefix (heci_ would be OK). Or make them static, if poss.
> +/**
> + * heci_write_message - write a message to heci device.
> + *
> + * @dev: device object for our driver
> + * @heci_hdr: header of message
> + * @write_buffer: message buffer will be write
> + * @write_length: message size will be write
> + *
> + * returns 1 if success, 0 - otherwise.
> + */
> +int heci_write_message(struct iamt_heci_device *dev,
> + struct heci_msg_hdr *header,
> + unsigned char *write_buffer,
> + unsigned long write_length)
> +{
> + __u32 temp_msg = 0;
> + unsigned long bytes_written = 0;
> + unsigned char buffer_depth, filled_slots, empty_slots;
> + unsigned long dw_to_write;
> +
> + dev->host_hw_state = read_heci_register(dev, H_CSR);
> + DBG("host_hw_state = 0x%08x.\n", dev->host_hw_state);
> + DBG("heci_write_message header=%08x.\n", *((__u32 *) header));
> + buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
> + filled_slots = _host_get_filled_slots(dev);
> + empty_slots = buffer_depth - filled_slots;
> + DBG("filled = %hu, empty = %hu.\n", filled_slots, empty_slots);
> +
> + dw_to_write = ((write_length + 3) / 4);
Please use the helpers, if they exist. I expect that DIV_ROUND_UP() or
roundup() could be used here. (Multiple instances)
> + if (dw_to_write > empty_slots)
> + return 0;
> +
> + write_heci_register(dev, H_CB_WW, *((__u32 *) header));
> +
> + while (write_length >= 4) {
> + write_heci_register(dev, H_CB_WW,
> + *(__u32 *) (write_buffer + bytes_written));
> + bytes_written += 4;
> + write_length -= 4;
> + }
> +
> + if (write_length > 0) {
> + memcpy(&temp_msg, &write_buffer[bytes_written], write_length);
> + write_heci_register(dev, H_CB_WW, temp_msg);
> + }
> +
> + dev->host_hw_state |= H_IG;
> + write_heci_register(dev, H_CSR, dev->host_hw_state);
> + dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
> + if ((dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
> + return 0;
> +
> + dev->write_hang = 0;
> + return 1;
> +}
> +
> +/**
> + * count_full_read_slots - count read full slots.
> + *
> + * @dev: device object for our driver
> + *
> + * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise filled slots count
> + */
> +__s32 count_full_read_slots(struct iamt_heci_device *dev)
namespace...
> +{
> + char read_ptr, write_ptr;
> + unsigned char buffer_depth, filled_slots;
> +
> + dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
> + buffer_depth = (unsigned char)((dev->me_hw_state & ME_CBD_HRA) >> 24);
> + read_ptr = (char) ((dev->me_hw_state & ME_CBRP_HRA) >> 8);
> + write_ptr = (char) ((dev->me_hw_state & ME_CBWP_HRA) >> 16);
> + filled_slots = (unsigned char) (write_ptr - read_ptr);
> +
> + if (filled_slots > buffer_depth) {
> + /* overflow */
> + return -ESLOTS_OVERFLOW;
> + }
> +
> + DBG("filled_slots =%08x \n", filled_slots);
> + return (__s32) filled_slots;
> +}
> +
> +/**
> + * heci_read_slots - read a message from heci device.
> + *
> + * @dev: device object for our driver
> + * @buffer: message buffer will be write
> + * @buffer_length: message size will be read
> + */
> +void heci_read_slots(struct iamt_heci_device *dev,
> + unsigned char *buffer, unsigned long buffer_length)
> +{
> + __u32 i = 0;
> + unsigned char temp_buf[sizeof(__u32)];
> +
> + while (buffer_length >= sizeof(__u32)) {
> + ((__u32 *) buffer)[i] = read_heci_register(dev, ME_CB_RW);
> + DBG("buffer[%d]= %d\n", i, ((__u32 *) buffer)[i]);
> + i++;
> + buffer_length -= sizeof(__u32);
> + }
> +
> + if (buffer_length > 0) {
> + *((__u32 *) &temp_buf) = read_heci_register(dev, ME_CB_RW);
> + memcpy(&buffer[i * 4], temp_buf, buffer_length);
> + }
> +
> + dev->host_hw_state |= H_IG;
> + heci_set_csr_register(dev);
> +}
> +
> +/**
> + * flow_ctrl_creds - check flow_control credentials.
> + *
> + * @dev: device object for our driver
> + * @file_ext: private data of the file object
> + *
> + * returns 1 if flow_ctrl_creds >0, 0 - otherwise.
> + */
> +int flow_ctrl_creds(struct iamt_heci_device *dev,
namespace
> + struct heci_file_private *file_ext)
> +{
> + __u8 i;
> +
> + if (!dev->num_heci_me_clients)
> + return 0;
> +
> + if (file_ext == NULL)
> + return 0;
> +
> + if (file_ext->flow_ctrl_creds > 0)
> + return 1;
> +
> + for (i = 0; i < dev->num_heci_me_clients; i++) {
> + if (dev->me_clients[i].client_id == file_ext->me_client_id) {
> + if (dev->me_clients[i].flow_ctrl_creds > 0) {
> + BUG_ON(dev->me_clients[i].props.single_recv_buf
> + == 0);
> + return 1;
> + }
> + return 0;
> + }
> + }
> + BUG();
> + return 0;
> +}
> +
> +/**
> + * flow_ctrl_reduce - reduce flow_control.
> + *
> + * @dev: device object for our driver
> + * @file_ext: private data of the file object
> + */
> +void flow_ctrl_reduce(struct iamt_heci_device *dev,
namespace
> + struct heci_file_private *file_ext)
> +{
> + __u8 i;
> +
> + if (!dev->num_heci_me_clients)
> + return;
> +
> + for (i = 0; i < dev->num_heci_me_clients; i++) {
> + if (dev->me_clients[i].client_id == file_ext->me_client_id) {
> + if (dev->me_clients[i].props.single_recv_buf != 0) {
> + BUG_ON(dev->me_clients[i].flow_ctrl_creds <= 0);
> + dev->me_clients[i].flow_ctrl_creds--;
> + } else {
> + BUG_ON(file_ext->flow_ctrl_creds <= 0);
> + file_ext->flow_ctrl_creds--;
> + }
> + return;
> + }
> + }
> + BUG();
> +}
> +
> +/**
> + * heci_send_flow_control - send flow control to fw.
> + *
> + * @dev: device object for our driver
> + * @file_ext: private data of the file object
> + *
> + * returns 1 if success, 0 - otherwise.
> + */
> +int heci_send_flow_control(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> + struct heci_msg_hdr *heci_hdr;
> + struct hbm_flow_control *heci_flow_control;
> +
> + heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
> + heci_hdr->host_addr = 0;
> + heci_hdr->me_addr = 0;
> + heci_hdr->length = sizeof(struct hbm_flow_control);
> + heci_hdr->msg_complete = 1;
> + heci_hdr->reserved = 0;
> +
> + heci_flow_control = (struct hbm_flow_control *) &dev->wr_msg_buf[1];
> + memset(heci_flow_control, 0, sizeof(heci_flow_control));
> + heci_flow_control->host_addr = file_ext->host_client_id;
> + heci_flow_control->me_addr = file_ext->me_client_id;
> + heci_flow_control->cmd.cmd = HECI_FLOW_CONTROL_CMD;
> + memset(heci_flow_control->reserved, 0,
> + sizeof(heci_flow_control->reserved));
This code seems pretty repetitive.
I expect it would be hard to factor out the common bits cleanly, dunno.
> + DBG("sending flow control host client = %d, me client = %d\n",
> + file_ext->host_client_id, file_ext->me_client_id);
> + if (!heci_write_message(dev, heci_hdr,
> + (unsigned char *) heci_flow_control,
> + sizeof(struct hbm_flow_control)))
> + return 0;
> +
> + return 1;
> +
> +}
> +
> +/**
> + * other_client_is_connecting - check if other
> + * client with the same client id is connected.
> + *
> + * @dev: device object for our driver
> + * @file_ext: private data of the file object
> + *
> + * returns 1 if other client is connected, 0 - otherwise.
> + */
> +int other_client_is_connecting(struct iamt_heci_device *dev,
namespace
> + struct heci_file_private *file_ext)
> +{
> + struct heci_file_private *file_pos = NULL;
> + struct heci_file_private *file_next = NULL;
> +
> + list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
> + if ((file_pos->state == HECI_FILE_CONNECTING)
> + && (file_pos != file_ext)
> + && file_ext->me_client_id == file_pos->me_client_id)
> + return 1;
> +
> + }
> + return 0;
> +}
> +
> +/**
> + * heci_send_wd - send watch dog message to fw.
> + *
> + * @dev: device object for our driver
> + *
> + * returns 1 if success, 0 - otherwise.
A common kernel convention is "returns 0 on success, else a -ve errno".
Please use that convention unless there are good reasons why it is not
practical to do so.
> + */
> +int heci_send_wd(struct iamt_heci_device *dev)
> +{
> + struct heci_msg_hdr *heci_hdr;
> +
> + heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
> + heci_hdr->host_addr = dev->wd_file_ext.host_client_id;
> + heci_hdr->me_addr = dev->wd_file_ext.me_client_id;
> + heci_hdr->msg_complete = 1;
> + heci_hdr->reserved = 0;
> +
> + if (!memcmp(dev->wd_data, heci_start_wd_params,
> + HECI_WD_PARAMS_SIZE)) {
> + heci_hdr->length = HECI_START_WD_DATA_SIZE;
> + } else {
> + BUG_ON(memcmp(dev->wd_data, heci_stop_wd_params,
> + HECI_WD_PARAMS_SIZE));
> + heci_hdr->length = HECI_WD_PARAMS_SIZE;
> + }
> +
> + if (!heci_write_message(dev, heci_hdr, dev->wd_data, heci_hdr->length))
> + return 0;
> +
> + return 1;
> +}
> +
> +/**
> + * heci_disconnect - send disconnect message to fw.
> + *
> + * @dev: device object for our driver
> + * @file_ext: private data of the file object
> + *
> + * returns 1 if success, 0 - otherwise.
> + */
> +int heci_disconnect(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> + struct heci_msg_hdr *heci_hdr;
> + struct hbm_client_disconnect_request *heci_cli_disconnect;
> +
> + heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
> + heci_hdr->host_addr = 0;
> + heci_hdr->me_addr = 0;
> + heci_hdr->length = sizeof(struct hbm_client_disconnect_request);
> + heci_hdr->msg_complete = 1;
> + heci_hdr->reserved = 0;
> +
> + heci_cli_disconnect =
> + (struct hbm_client_disconnect_request *) &dev->wr_msg_buf[1];
> + memset(heci_cli_disconnect, 0, sizeof(heci_cli_disconnect));
> + heci_cli_disconnect->host_addr = file_ext->host_client_id;
> + heci_cli_disconnect->me_addr = file_ext->me_client_id;
> + heci_cli_disconnect->cmd.cmd = CLIENT_DISCONNECT_REQ_CMD;
> + heci_cli_disconnect->reserved[0] = 0;
> +
> + if (!heci_write_message(dev, heci_hdr,
> + (unsigned char *) heci_cli_disconnect,
> + sizeof(struct hbm_client_disconnect_request)))
> + return 0;
> +
> + return 1;
> +}
> +
> +/**
> + * heci_connect - send connect message to fw.
> + *
> + * @dev: device object for our driver
> + * @file_ext: private data of the file object
> + *
> + * returns 1 if success, 0 - otherwise.
> + */
> +int heci_connect(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> + struct heci_msg_hdr *heci_hdr;
> + struct hbm_client_connect_request *heci_cli_connect;
> +
> + heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
> + heci_hdr->host_addr = 0;
> + heci_hdr->me_addr = 0;
> + heci_hdr->length = sizeof(struct hbm_client_connect_request);
> + heci_hdr->msg_complete = 1;
> + heci_hdr->reserved = 0;
> +
> + heci_cli_connect =
> + (struct hbm_client_connect_request *) &dev->wr_msg_buf[1];
> + heci_cli_connect->host_addr = file_ext->host_client_id;
> + heci_cli_connect->me_addr = file_ext->me_client_id;
> + heci_cli_connect->cmd.cmd = CLIENT_CONNECT_REQ_CMD;
> + heci_cli_connect->reserved = 0;
> +
> + if (!heci_write_message(dev, heci_hdr,
> + (unsigned char *) heci_cli_connect,
> + sizeof(struct hbm_client_connect_request)))
> + return 0;
> +
> + return 1;
> +}
> diff --git a/drivers/char/heci/heci_interface.h b/drivers/char/heci/heci_interface.h
> new file mode 100644
> index 0000000..37336eb
> --- /dev/null
> +++ b/drivers/char/heci/heci_interface.h
> @@ -0,0 +1,170 @@
> +/*
> + * Part of Intel(R) Manageability Engine Interface Linux driver
> + *
> + * Copyright (c) 2003 - 2008 Intel Corp.
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + * 1. Redistributions of source code must retain the above copyright
> + * notice, this list of conditions, and the following disclaimer,
> + * without modification.
> + * 2. Redistributions in binary form must reproduce at minimum a disclaimer
> + * substantially similar to the "NO WARRANTY" disclaimer below
> + * ("Disclaimer") and any redistribution must be conditioned upon
> + * including a substantially similar Disclaimer requirement for further
> + * binary redistribution.
> + * 3. Neither the names of the above-listed copyright holders nor the names
> + * of any contributors may be used to endorse or promote products derived
> + * from this software without specific prior written permission.
> + *
> + * Alternatively, this software may be distributed under the terms of the
> + * GNU General Public License ("GPL") version 2 as published by the Free
> + * Software Foundation.
> + *
> + * NO WARRANTY
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
> + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
> + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
> + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> + * POSSIBILITY OF SUCH DAMAGES.
> + *
> + */
> +
> +
> +#ifndef _HECI_INTERFACE_H_
> +#define _HECI_INTERFACE_H_
> +
> +#include <linux/version.h>
> +#include <linux/spinlock.h>
> +#include <linux/list.h>
> +#include <linux/pci.h>
> +#include <linux/timer.h>
> +#include <linux/interrupt.h>
> +#include <linux/workqueue.h>
> +#include <linux/module.h>
> +#include <linux/aio.h>
> +#include <linux/types.h>
> +#include "heci_data_structures.h"
> +
> +
> +#define HBM_MINOR_VERSION 0
> +#define HBM_MAJOR_VERSION 1
> +#define HBM_TIMEOUT 1 /* 1 second */
> +
> +
> +#define HOST_START_REQ_CMD 0x01
> +#define HOST_START_RES_CMD 0x81
> +
> +#define HOST_STOP_REQ_CMD 0x02
> +#define HOST_STOP_RES_CMD 0x82
> +
> +#define ME_STOP_REQ_CMD 0x03
> +
> +#define HOST_ENUM_REQ_CMD 0x04
> +#define HOST_ENUM_RES_CMD 0x84
> +
> +#define HOST_CLIENT_PROPERTEIS_REQ_CMD 0x05
> +#define HOST_CLIENT_PROPERTEIS_RES_CMD 0x85
> +
> +#define CLIENT_CONNECT_REQ_CMD 0x06
> +#define CLIENT_CONNECT_RES_CMD 0x86
> +
> +#define CLIENT_DISCONNECT_REQ_CMD 0x07
> +#define CLIENT_DISCONNECT_RES_CMD 0x87
> +
> +#define HECI_FLOW_CONTROL_CMD 0x08
Some comments describing all the above would be useful. The emphasis
should, as always, be upon by "why they exist" rather than upon "what
they do".
> +
> +#define AMT_WD_VALUE 120 /* seconds */
> +
> +#define HECI_WATCHDOG_DATA_SIZE 16
> +#define HECI_START_WD_DATA_SIZE 20
> +#define HECI_WD_PARAMS_SIZE 4
> +
> +/* IOCTL commands */
> +#define IOCTL_HECI_GET_VERSION \
> + _IOWR('H' , 0x0, struct heci_message_data)
> +#define IOCTL_HECI_CONNECT_CLIENT \
> + _IOWR('H' , 0x01, struct heci_message_data)
> +#define IOCTL_HECI_WD \
> + _IOWR('H' , 0x02, struct heci_message_data)
> +#define IOCTL_HECI_BYPASS_WD \
> + _IOWR('H' , 0x10, struct heci_message_data)
So this driver implements ioctls!
That is a core, top-level, userspace-visible design decision! It
should have been given prominent billing in the changelog description.
These four values are supposed to be exported to userspace headers,
yes? But they're buried in a kernel-internal header and don't have the
appropriate __KERNEL__ wrappers.
> +enum heci_stop_reason_types{
> + DRIVER_STOP_REQUEST = 0x00,
> + DEVICE_D1_ENTRY = 0x01,
> + DEVICE_D2_ENTRY = 0x02,
> + DEVICE_D3_ENTRY = 0x03,
> + SYSTEM_S1_ENTRY = 0x04,
> + SYSTEM_S2_ENTRY = 0x05,
> + SYSTEM_S3_ENTRY = 0x06,
> + SYSTEM_S4_ENTRY = 0x07,
> + SYSTEM_S5_ENTRY = 0x08
> +};
> +
> +enum me_stop_reason_types{
> + FW_UPDATE = 0x00
> +};
> +
> +enum client_connect_status_types{
> + CCS_SUCCESS = 0x00,
> + CCS_NOT_FOUND = 0x01,
> + CCS_ALREADY_STARTED = 0x02,
> + CCS_OUT_OF_RESOURCES = 0x03,
> + CCS_MESSAGE_SMALL = 0x04
> +};
> +
> +enum client_disconnect_status_types{
> + CDS_SUCCESS = 0x00
> +};
> +
> +
> +/*
> + * heci interface function prototypes
> + */
> +void heci_set_csr_register(struct iamt_heci_device *dev);
> +void heci_csr_enable_interrupts(struct iamt_heci_device *dev);
> +void heci_csr_disable_interrupts(struct iamt_heci_device *dev);
> +
> +void heci_read_slots(struct iamt_heci_device *dev,
> + unsigned char *buffer, unsigned long buffer_length);
> +
> +int heci_write_message(struct iamt_heci_device *dev,
> + struct heci_msg_hdr *header,
> + unsigned char *write_buffer,
> + unsigned long write_length);
> +
> +int host_buffer_is_empty(struct iamt_heci_device *dev);
> +
> +__s32 count_full_read_slots(struct iamt_heci_device *dev);
> +
> +__s32 count_empty_write_slots(const struct iamt_heci_device *dev);
> +
> +int flow_ctrl_creds(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext);
> +
> +int heci_send_wd(struct iamt_heci_device *dev);
> +
> +void flow_ctrl_reduce(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext);
> +
> +int heci_send_flow_control(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext);
> +
> +int heci_disconnect(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext);
> +int other_client_is_connecting(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext);
> +int heci_connect(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext);
> +
> +#endif /* _HECI_INTERFACE_H_ */
> diff --git a/drivers/char/heci/heci_main.c b/drivers/char/heci/heci_main.c
> new file mode 100644
> index 0000000..c587c94
> --- /dev/null
> +++ b/drivers/char/heci/heci_main.c
> @@ -0,0 +1,1563 @@
> +/*
> + * Part of Intel(R) Manageability Engine Interface Linux driver
> + *
> + * Copyright (c) 2003 - 2008 Intel Corp.
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + * 1. Redistributions of source code must retain the above copyright
> + * notice, this list of conditions, and the following disclaimer,
> + * without modification.
> + * 2. Redistributions in binary form must reproduce at minimum a disclaimer
> + * substantially similar to the "NO WARRANTY" disclaimer below
> + * ("Disclaimer") and any redistribution must be conditioned upon
> + * including a substantially similar Disclaimer requirement for further
> + * binary redistribution.
> + * 3. Neither the names of the above-listed copyright holders nor the names
> + * of any contributors may be used to endorse or promote products derived
> + * from this software without specific prior written permission.
> + *
> + * Alternatively, this software may be distributed under the terms of the
> + * GNU General Public License ("GPL") version 2 as published by the Free
> + * Software Foundation.
> + *
> + * NO WARRANTY
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
> + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
> + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
> + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> + * POSSIBILITY OF SUCH DAMAGES.
> + *
> + */
> +
> +
> +#include <linux/module.h>
> +#include <linux/moduleparam.h>
> +#include <linux/kernel.h>
> +#include <linux/slab.h>
> +#include <linux/fs.h>
> +#include <linux/errno.h>
> +#include <linux/types.h>
> +#include <linux/fcntl.h>
> +#include <linux/aio.h>
> +#include <linux/pci.h>
> +#include <linux/reboot.h>
> +#include <linux/poll.h>
> +#include <linux/init.h>
> +#include <linux/kdev_t.h>
> +#include <linux/ioctl.h>
> +#include <linux/cdev.h>
> +#include <linux/device.h>
> +#include <linux/unistd.h>
> +#include <linux/kthread.h>
> +
> +#include "heci.h"
> +#include "heci_interface.h"
> +#include "heci_version.h"
> +
> +
> +#define HECI_READ_TIMEOUT 45
I was going to ask "what units", but this is unused.
> +#define HECI_DRIVER_NAME "heci"
> +
> +/*
> + * heci driver strings
> + */
> +char heci_driver_name[] = HECI_DRIVER_NAME;
> +char heci_driver_string[] = "Intel(R) Management Engine Interface";
> +char heci_driver_version[] = HECI_DRIVER_VERSION;
> +char heci_copyright[] = "Copyright (c) 2003 - 2008 Intel Corporation.";
> +
> +
> +#ifdef HECI_DEBUG
> +int heci_debug = 1;
> +#else
> +int heci_debug;
> +#endif
> +MODULE_PARM_DESC(heci_debug, "Debug enabled or not");
> +module_param(heci_debug, int, 0644);
> +
> +
> +#define HECI_DEV_NAME "heci"
> +
> +/* heci char device for registration */
> +static struct cdev heci_cdev;
> +
> +/* major number for device */
> +static int heci_major;
> +/* The device pointer */
> +static struct pci_dev *heci_device;
> +
> +struct class *heci_class;
> +struct device *heci_dev;
> +
> +
> +/* heci_pci_tbl - PCI Device ID Table */
> +static struct pci_device_id heci_pci_tbl[] = {
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82946GZ)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G35)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82Q965)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G965)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GM965)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GME965)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q35)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82G33)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q33)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82X38)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_3200)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_6)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_7)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_8)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_9)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_10)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_1)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_2)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_3)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_4)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_1)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_2)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_3)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_4)},
> + /* required last entry */
> + {0, }
> +};
> +
> +MODULE_DEVICE_TABLE(pci, heci_pci_tbl);
> +
> +/*
> + * Local Function Prototypes
> + */
> +static int __init heci_init_module(void);
> +static void __exit heci_exit_module(void);
> +static int __devinit heci_probe(struct pci_dev *pdev,
> + const struct pci_device_id *ent);
> +static void __devexit heci_remove(struct pci_dev *pdev);
> +static int heci_open(struct inode *inode, struct file *file);
> +static int heci_release(struct inode *inode, struct file *file);
> +static ssize_t heci_read(struct file *file, char __user *ubuf,
> + size_t length, loff_t *offset);
> +static int heci_ioctl(struct inode *inode, struct file *file,
> + unsigned int cmd, unsigned long data);
> +static ssize_t heci_write(struct file *file, const char __user *ubuf,
> + size_t length, loff_t *offset);
> +static unsigned int heci_poll(struct file *file, poll_table *wait);
> +static struct heci_cb_private *find_read_list_entry(
> + struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext);
> +#ifdef CONFIG_PM
> +static int heci_suspend(struct pci_dev *pdev, pm_message_t state);
> +static int heci_resume(struct pci_dev *pdev);
> +static __u16 g_sus_wd_timeout;
> +#else
> +#define heci_suspend NULL
> +#define heci_resume NULL
> +#endif
> +/*
> + * PCI driver structure
> + */
> +static struct pci_driver heci_driver = {
> + .name = heci_driver_name,
> + .id_table = heci_pci_tbl,
> + .probe = heci_probe,
> + .remove = __devexit_p(heci_remove),
> + .shutdown = __devexit_p(heci_remove),
> + .suspend = heci_suspend,
> + .resume = heci_resume
> +};
> +
> +/*
> + * file operations structure will be use heci char device.
> + */
> +static struct file_operations heci_fops = {
> + .owner = THIS_MODULE,
> + .read = heci_read,
> + .ioctl = heci_ioctl,
> + .open = heci_open,
> + .release = heci_release,
> + .write = heci_write,
> + .poll = heci_poll,
> +};
> +
> +/**
> + * heci_registration_cdev - set up the cdev structure for heci device.
> + *
> + * @dev: char device struct
> + * @hminor: minor number for registration char device
> + * @fops: file operations structure
> + *
> + * returns 0 on success, <0 on failure.
> + */
> +static int heci_registration_cdev(struct cdev *dev, int hminor,
> + struct file_operations *fops)
> +{
> + int ret, devno = MKDEV(heci_major, hminor);
> +
> + cdev_init(dev, fops);
> + dev->owner = THIS_MODULE;
> + ret = cdev_add(dev, devno, 1);
> + /* Fail gracefully if need be */
> + if (ret) {
> + printk(KERN_ERR "heci: Error %d registering heci device %d\n",
> + ret, hminor);
> + }
> + return ret;
> +}
> +
> +/* Display the version of heci driver. */
> +static ssize_t version_show(struct class *dev, char *buf)
> +{
> + return sprintf(buf, "%s %s.\n",
> + heci_driver_string, heci_driver_version);
> +}
> +
> +static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
More undocumented, unchangelogged kernel->userspace interface.
Please at least describe these proposed major kernel interface additions
in the changelog.
There's also Documentation/ABI...
> +/**
> + * heci_register_cdev - registers heci char device
> + *
> + * returns 0 on success, <0 on failure.
> + */
> +static int heci_register_cdev(void)
> +{
> + int ret;
> + dev_t dev;
> +
> + /* registration of char devices */
> + ret = alloc_chrdev_region(&dev, HECI_MINORS_BASE, HECI_MINORS_COUNT,
> + HECI_DRIVER_NAME);
> + if (ret) {
> + printk(KERN_ERR "heci: Error allocating char device region.\n");
> + return ret;
> + }
> +
> + heci_major = MAJOR(dev);
> +
> + ret = heci_registration_cdev(&heci_cdev, HECI_MINOR_NUMBER,
> + &heci_fops);
> + if (ret)
> + unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
> + HECI_MINORS_COUNT);
> +
> + return ret;
> +}
> +
> +/**
> + * heci_unregister_cdev - unregisters heci char device
> + */
> +static void heci_unregister_cdev(void)
> +{
> + cdev_del(&heci_cdev);
> + unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
> + HECI_MINORS_COUNT);
> +}
> +
> +/**
> + * heci_sysfs_device_create - adds device entry to sysfs
> + *
> + * returns 0 on success, <0 on failure.
> + */
> +static int heci_sysfs_device_create(void)
> +{
> + struct class *class;
> + struct device *tmphdev;
> + int err = 0;
> +
> + class = class_create(THIS_MODULE, HECI_DRIVER_NAME);
> + if (IS_ERR(class)) {
> + err = PTR_ERR(class);
> + printk(KERN_ERR "heci: Error creating heci class.\n");
> + goto err_out;
> + }
> +
> + err = class_create_file(class, &class_attr_version);
> + if (err) {
> + class_destroy(class);
> + printk(KERN_ERR "heci: Error creating heci class file.\n");
> + goto err_out;
> + }
> +
> + tmphdev = device_create(class, NULL, heci_cdev.dev, NULL,
> + HECI_DEV_NAME);
> + if (IS_ERR(tmphdev)) {
> + err = PTR_ERR(tmphdev);
> + class_remove_file(class, &class_attr_version);
> + class_destroy(class);
> + goto err_out;
> + }
> +
> + heci_dev = tmphdev;
> + heci_class = class;
> +err_out:
> + return err;
> +}
So it has a sysfs interface as well as a /dev node interface.
I shouldn't have had to read this far to find that out.
> +/**
> + * heci_sysfs_device_remove - unregisters the device entry on sysfs
> + */
> +static void heci_sysfs_device_remove(void)
> +{
> + if ((heci_class == NULL) || (IS_ERR(heci_class)))
> + return;
Can these happen?
> + heci_dev = NULL;
> + device_destroy(heci_class, heci_cdev.dev);
> + class_remove_file(heci_class, &class_attr_version);
> + class_destroy(heci_class);
I see no kthread_stop() here. Is it needed?
> +}
> +
> +/**
> + * heci_init_module - Driver Registration Routine
> + *
> + * heci_init_module is the first routine called when the driver is
> + * loaded. All it does is register with the PCI subsystem.
> + *
> + * returns 0 on success, <0 on failure.
> + */
> +static int __init heci_init_module(void)
> +{
> + int ret = 0;
> +
> + printk(KERN_INFO "heci: %s - version %s\n", heci_driver_string,
> + heci_driver_version);
> + printk(KERN_INFO "heci: %s\n", heci_copyright);
> +
> + /* init pci module */
> + ret = pci_register_driver(&heci_driver);
Should this driver have depended upon CONFIG_PCI?
> + if (ret < 0) {
> + printk(KERN_ERR "heci: Error registering driver.\n");
> + goto end;
> + }
> +
> + ret = heci_register_cdev();
> + if (ret)
> + goto unregister_pci;
> +
> + ret = heci_sysfs_device_create();
> + if (ret)
> + goto unregister_cdev;
> +
> + return ret;
> +
> +unregister_cdev:
> + heci_unregister_cdev();
> +unregister_pci:
> + pci_unregister_driver(&heci_driver);
> +end:
> + return ret;
> +}
> +
> +module_init(heci_init_module);
> +
> +
> +/**
> + * heci_exit_module - Driver Exit Cleanup Routine
> + *
> + * heci_exit_module is called just before the driver is removed
> + * from memory.
> + */
> +static void __exit heci_exit_module(void)
> +{
> + pci_unregister_driver(&heci_driver);
> + heci_sysfs_device_remove();
> + heci_unregister_cdev();
> +}
> +
> +module_exit(heci_exit_module);
> +
> +
> +/**
> + * heci_probe - Device Initialization Routine
> + *
> + * @pdev: PCI device information struct
> + * @ent: entry in kcs_pci_tbl
> + *
> + * returns 0 on success, <0 on failure.
> + */
> +static int __devinit heci_probe(struct pci_dev *pdev,
> + const struct pci_device_id *ent)
> +{
> + struct iamt_heci_device *dev = NULL;
> + int i, err = 0;
> +
> + if (heci_device) {
> + err = -EEXIST;
> + goto end;
Now surely that can't happen.
> + }
> + /* enable pci dev */
> + err = pci_enable_device(pdev);
> + if (err) {
> + printk(KERN_ERR "heci: Failed to enable pci device.\n");
> + goto end;
> + }
> + /* set PCI host mastering */
> + pci_set_master(pdev);
> + /* pci request regions for heci driver */
> + err = pci_request_regions(pdev, heci_driver_name);
> + if (err) {
> + printk(KERN_ERR "heci: Failed to get pci regions.\n");
> + goto disable_device;
> + }
> + /* allocates and initializes the heci dev structure */
> + dev = init_heci_device(pdev);
> + if (!dev) {
> + err = -ENOMEM;
> + goto release_regions;
> + }
> + /* mapping IO device memory */
> + for (i = 0; i <= 5; i++) {
> + if (pci_resource_len(pdev, i) == 0)
> + continue;
> + if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
> + printk(KERN_ERR "heci: heci has IO ports.\n");
> + goto free_device;
> + } else if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
> + if (dev->mem_base) {
> + printk(KERN_ERR
> + "heci: Too many mem addresses.\n");
> + goto free_device;
> + }
> + dev->mem_base = pci_resource_start(pdev, i);
> + dev->mem_length = pci_resource_len(pdev, i);
> + }
> + }
> + if (!dev->mem_base) {
> + printk(KERN_ERR "heci: No address to use.\n");
> + err = -ENODEV;
> + goto free_device;
> + }
> + dev->mem_addr = ioremap_nocache(dev->mem_base,
> + dev->mem_length);
argh, mem_addr definitely has a quite wrong type.
Please run sparse across the driver.
> + if (!dev->mem_addr) {
> + printk(KERN_ERR "heci: Remap IO device memory failure.\n");
> + err = -ENOMEM;
> + goto free_device;
> + }
> + /* request and enable interrupt */
> + err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
> + heci_driver_name, dev);
Doing request_irq() after pci_enable_device() is dengerous. If the
device happened to be requesting an interrupt when we did
pci_enable_device(), things will generally go pear-shaped.
> + if (err) {
> + printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
> + pdev->irq);
> + goto unmap_memory;
> + }
> +
> + if (heci_hw_init(dev)) {
> + printk(KERN_ERR "heci: Init hw failure.\n");
> + err = -ENODEV;
> + goto release_irq;
> + }
> + init_timer(&dev->wd_timer);
> +
> + heci_initialize_clients(dev);
> + if (dev->heci_state != HECI_ENABLED) {
> + err = -ENODEV;
> + goto release_hw;
> + }
> +
> + spin_lock_bh(&dev->device_lock);
> + heci_device = pdev;
> + pci_set_drvdata(pdev, dev);
This seems to have come a bit late. Isn't this information needed in
the interrupt handler?
Bear in mind that your interrupt handler can be called even if the
device isn't generating an interrupt, due to IRQ sharing.
Please test with CONFIG_DEBUG_SHIRQ enabled.
> + spin_unlock_bh(&dev->device_lock);
> +
> + if (dev->wd_timeout)
> + mod_timer(&dev->wd_timer, jiffies);
> +
> +#ifdef CONFIG_PM
> + g_sus_wd_timeout = 0;
> +#endif
> + printk(KERN_INFO "heci driver initialization successful.\n");
> + return 0;
> +
> +release_hw:
> + /* disable interrupts */
> + dev->host_hw_state = read_heci_register(dev, H_CSR);
> + heci_csr_disable_interrupts(dev);
> +
> + del_timer_sync(&dev->wd_timer);
> +
> + flush_scheduled_work();
Might want cancel_work_sync() here.
> +release_irq:
> + free_irq(pdev->irq, dev);
> +unmap_memory:
> + if (dev->mem_addr)
> + iounmap(dev->mem_addr);
> +free_device:
> + kfree(dev);
> +release_regions:
> + pci_release_regions(pdev);
> +disable_device:
> + pci_disable_device(pdev);
> +end:
> + printk(KERN_ERR "heci driver initialization failed.\n");
> + return err;
> +}
> +
> +/**
> + * heci_remove - Device Removal Routine
> + *
> + * @pdev: PCI device information struct
> + *
> + * heci_remove is called by the PCI subsystem to alert the driver
> + * that it should release a PCI device.
> + */
> +static void __devexit heci_remove(struct pci_dev *pdev)
> +{
> + struct iamt_heci_device *dev = pci_get_drvdata(pdev);
> +
> + if (heci_device != pdev)
> + return;
> +
> + if (dev == NULL)
> + return;
> +
> + spin_lock_bh(&dev->device_lock);
> + if (heci_device != pdev) {
> + spin_unlock_bh(&dev->device_lock);
> + return;
> + }
> +
> + if (dev->reinit_tsk != NULL) {
> + kthread_stop(dev->reinit_tsk);
> + dev->reinit_tsk = NULL;
> + }
It is a bug to call kthread_stop() under spinlock.
Please always test new code with all kernel debugging options enabled.
Please review Documentation/SubmitChecklist.
> + del_timer_sync(&dev->wd_timer);
> + if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
> + && dev->wd_timeout) {
> + dev->wd_timeout = 0;
> + dev->wd_due_counter = 0;
> + memcpy(dev->wd_data, heci_stop_wd_params, HECI_WD_PARAMS_SIZE);
> + dev->stop = 1;
> + if (dev->host_buffer_is_empty &&
> + flow_ctrl_creds(dev, &dev->wd_file_ext)) {
> + dev->host_buffer_is_empty = 0;
> +
> + if (!heci_send_wd(dev))
> + DBG("send stop WD failed\n");
> + else
> + flow_ctrl_reduce(dev, &dev->wd_file_ext);
> +
> + dev->wd_pending = 0;
> + } else {
> + dev->wd_pending = 1;
> + }
> + dev->wd_stoped = 0;
> + spin_unlock_bh(&dev->device_lock);
> +
> + wait_event_interruptible_timeout(dev->wait_stop_wd,
> + (dev->wd_stoped), 10 * HZ);
> + spin_lock_bh(&dev->device_lock);
> + if (!dev->wd_stoped)
> + DBG("stop wd failed to complete.\n");
> + else
> + DBG("stop wd complete.\n");
> +
> + }
> +
> + heci_device = NULL;
> + spin_unlock_bh(&dev->device_lock);
> +
> + if (dev->iamthif_file_ext.state == HECI_FILE_CONNECTED) {
> + dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTING;
> + heci_disconnect_host_client(dev,
> + &dev->iamthif_file_ext);
> + }
> + if (dev->wd_file_ext.state == HECI_FILE_CONNECTED) {
> + dev->wd_file_ext.state = HECI_FILE_DISCONNECTING;
> + heci_disconnect_host_client(dev,
> + &dev->wd_file_ext);
> + }
> +
> + spin_lock_bh(&dev->device_lock);
> +
> + /* remove entry if already in list */
> + DBG("list del iamthif and wd file list.\n");
> + heci_remove_client_from_file_list(dev, dev->wd_file_ext.
> + host_client_id);
> + heci_remove_client_from_file_list(dev,
> + dev->iamthif_file_ext.host_client_id);
> +
> + dev->iamthif_current_cb = NULL;
> + dev->iamthif_file_ext.file = NULL;
> + dev->num_heci_me_clients = 0;
> +
> + spin_unlock_bh(&dev->device_lock);
> +
> + flush_scheduled_work();
> +
> + /* disable interrupts */
> + heci_csr_disable_interrupts(dev);
> +
> + free_irq(pdev->irq, dev);
> + pci_set_drvdata(pdev, NULL);
> +
> + if (dev->mem_addr)
> + iounmap(dev->mem_addr);
> +
> + kfree(dev);
> +
> + pci_release_regions(pdev);
> + pci_disable_device(pdev);
> +}
> +
> +/**
> + * heci_clear_list - remove all callbacks associated with file
> + * from heci_cb_list
> + *
> + * @file: file information struct
> + * @heci_cb_list: callbacks list
> + *
> + * heci_clear_list is called to clear resources associated with file
> + * when application calls close function or Ctrl-C was pressed
> + *
> + * returns 1 if callback removed from the list, 0 otherwise
> + */
> +static int heci_clear_list(struct iamt_heci_device *dev,
> + struct file *file, struct list_head *heci_cb_list)
> +{
> + struct heci_cb_private *priv_cb_pos = NULL;
> + struct heci_cb_private*priv_cb_next = NULL;
> + struct file *file_temp;
> + int rets = 0;
> +
> + /* list all list member */
> + list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
> + heci_cb_list, cb_list) {
> + file_temp = (struct file *)priv_cb_pos->file_object;
> + /* check if list member associated with a file */
> + if (file_temp == file) {
> + /* remove member from the list */
> + list_del(&priv_cb_pos->cb_list);
> + /* check if cb equal to current iamthif cb */
> + if (dev->iamthif_current_cb == priv_cb_pos) {
> + dev->iamthif_current_cb = NULL;
> + /* send flow control to iamthif client */
> + heci_send_flow_control(dev,
> + &dev->iamthif_file_ext);
> + }
> + /* free all allocated buffers */
> + heci_free_cb_private(priv_cb_pos);
> + rets = 1;
> + }
> + }
> + return rets;
> +}
> +
> +/**
> + * heci_clear_lists - remove all callbacks associated with file
> + *
> + * @dev: device information struct
> + * @file: file information struct
> + *
> + * heci_clear_lists is called to clear resources associated with file
> + * when application calls close function or Ctrl-C was pressed
> + *
> + * returns 1 if callback removed from the list, 0 otherwise
> + */
> +static int heci_clear_lists(struct iamt_heci_device *dev, struct file *file)
> +{
> + int rets = 0;
> +
> + /* remove callbacks associated with a file */
> + heci_clear_list(dev, file, &dev->pthi_cmd_list.heci_cb.cb_list);
> + if (heci_clear_list(dev, file,
> + &dev->pthi_read_complete_list.heci_cb.cb_list))
> + rets = 1;
> +
> + heci_clear_list(dev, file, &dev->ctrl_rd_list.heci_cb.cb_list);
> +
> + if (heci_clear_list(dev, file, &dev->ctrl_wr_list.heci_cb.cb_list))
> + rets = 1;
> +
> + if (heci_clear_list(dev, file,
> + &dev->write_waiting_list.heci_cb.cb_list))
> + rets = 1;
> +
> + if (heci_clear_list(dev, file, &dev->write_list.heci_cb.cb_list))
> + rets = 1;
> +
> + /* check if iamthif_current_cb not NULL */
> + if (dev->iamthif_current_cb && (!rets)) {
> + /* check file and iamthif current cb association */
> + if (dev->iamthif_current_cb->file_object == file) {
> + /* remove cb */
> + heci_free_cb_private(dev->iamthif_current_cb);
> + dev->iamthif_current_cb = NULL;
> + rets = 1;
> + }
> + }
> + return rets;
> +}
> +
> +/**
> + * heci_open - the open function
> + *
> + * @inode: pointer to inode structure
> + * @file: pointer to file structure
> + *
> + * returns 0 on success, <0 on error
> + */
> +static int heci_open(struct inode *inode, struct file *file)
> +{
> + struct heci_file_private *file_ext;
> + int if_num = iminor(inode);
> + struct iamt_heci_device *dev;
> +
> + if (!heci_device)
> + return -ENODEV;
> +
> + dev = pci_get_drvdata(heci_device);
> + if ((if_num != HECI_MINOR_NUMBER) || (!dev))
Surely these can't happen?
> + return -ENODEV;
> +
> + file_ext = heci_alloc_file_private(file);
Has this driver been tested with multiple processes all manipulating
the same device?
> + if (file_ext == NULL)
> + return -ENOMEM;
> +
> + spin_lock_bh(&dev->device_lock);
> + if (dev->heci_state != HECI_ENABLED) {
> + spin_unlock_bh(&dev->device_lock);
> + kfree(file_ext);
> + return -ENODEV;
> + }
> + if (dev->open_handle_count >= HECI_MAX_OPEN_HANDLE_COUNT) {
> + spin_unlock_bh(&dev->device_lock);
> + kfree(file_ext);
> + return -ENFILE;
> + };
> + dev->open_handle_count++;
> + list_add_tail(&file_ext->link, &dev->file_list);
> + while ((dev->heci_host_clients[dev->current_host_client_id / 8]
> + & (1 << (dev->current_host_client_id % 8))) != 0) {
find_next_bit()?
> + dev->current_host_client_id++; /* allow overflow */
> + DBG("current_host_client_id = %d\n",
> + dev->current_host_client_id);
> + DBG("dev->open_handle_count = %lu\n",
> + dev->open_handle_count);
> + }
> + DBG("current_host_client_id = %d\n", dev->current_host_client_id);
> + file_ext->host_client_id = dev->current_host_client_id;
> + dev->heci_host_clients[file_ext->host_client_id / 8] |=
> + (1 << (file_ext->host_client_id % 8));
> + spin_unlock_bh(&dev->device_lock);
> + spin_lock(&file_ext->file_lock);
> + file_ext->state = HECI_FILE_INITIALIZING;
> + file_ext->sm_state = 0;
> +
> + file->private_data = file_ext;
> + spin_unlock(&file_ext->file_lock);
> +
> + return 0;
> +}
> +
> +/**
> + * heci_release - the release function
> + *
> + * @inode: pointer to inode structure
> + * @file: pointer to file structure
> + *
> + * returns 0 on success, <0 on error
> + */
> +static int heci_release(struct inode *inode, struct file *file)
> +{
> + int rets = 0;
> + int if_num = iminor(inode);
> + struct heci_file_private *file_ext = file->private_data;
> + struct heci_cb_private *priv_cb = NULL;
> + struct iamt_heci_device *dev;
> +
> + if (!heci_device)
> + return -ENODEV;
> +
> + dev = pci_get_drvdata(heci_device);
> + if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
?
> + return -ENODEV;
> +
> + if (file_ext != &dev->iamthif_file_ext) {
I don't understand what this is all about.
> + spin_lock(&file_ext->file_lock);
> + if (file_ext->state == HECI_FILE_CONNECTED) {
> + file_ext->state = HECI_FILE_DISCONNECTING;
> + spin_unlock(&file_ext->file_lock);
> + DBG("disconnecting client host client = %d, "
> + "ME client = %d\n",
> + file_ext->host_client_id,
> + file_ext->me_client_id);
> + rets = heci_disconnect_host_client(dev, file_ext);
> + spin_lock(&file_ext->file_lock);
> + }
> + spin_lock_bh(&dev->device_lock);
> + heci_flush_queues(dev, file_ext);
> + DBG("remove client host client = %d, ME client = %d\n",
> + file_ext->host_client_id,
> + file_ext->me_client_id);
> +
> + if (dev->open_handle_count > 0) {
> + dev->heci_host_clients[file_ext->host_client_id / 8] &=
> + ~(1 << (file_ext->host_client_id % 8));
I think you wanted __set_bit() and __clear_bit() here.
> + dev->open_handle_count--;
> + }
> + heci_remove_client_from_file_list(dev,
> + file_ext->host_client_id);
> +
> + /* free read cb */
> + if (file_ext->read_cb != NULL) {
> + priv_cb = find_read_list_entry(dev, file_ext);
> + /* Remove entry from read list */
> + if (priv_cb != NULL)
> + list_del(&priv_cb->cb_list);
> +
> + priv_cb = file_ext->read_cb;
> + file_ext->read_cb = NULL;
> + }
> +
> + spin_unlock_bh(&dev->device_lock);
> + file->private_data = NULL;
Is this needed?
> + spin_unlock(&file_ext->file_lock);
Surely there's nothing to lock against in the ->release() handler?
> + if (priv_cb != NULL)
> + heci_free_cb_private(priv_cb);
> +
> + kfree(file_ext);
> + } else {
> + spin_lock_bh(&dev->device_lock);
> +
> + if (dev->open_handle_count > 0)
> + dev->open_handle_count--;
Is the test needed? Surely it would be a huge bug for
open_handle_count to go negative, and we want to know about huge bugs,
not hide them.
> + if (dev->iamthif_file_object == file
> + && dev->iamthif_state != HECI_IAMTHIF_IDLE) {
> + DBG("pthi canceled iamthif state %d\n",
> + dev->iamthif_state);
> + dev->iamthif_canceled = 1;
> + if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE) {
> + DBG("run next pthi iamthif cb\n");
> + run_next_iamthif_cmd(dev);
> + }
> + }
> +
> + if (heci_clear_lists(dev, file))
> + dev->iamthif_state = HECI_IAMTHIF_IDLE;
> +
> + spin_unlock_bh(&dev->device_lock);
> + }
> + return rets;
> +}
> +
> +static struct heci_cb_private *find_read_list_entry(
> + struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> + struct heci_cb_private *priv_cb_pos = NULL;
> + struct heci_cb_private *priv_cb_next = NULL;
> + struct heci_file_private *file_ext_list_temp;
> +
> + if (dev->read_list.status == 0
> + && !list_empty(&dev->read_list.heci_cb.cb_list)) {
> + DBG("remove read_list CB \n");
> + list_for_each_entry_safe(priv_cb_pos,
> + priv_cb_next,
> + &dev->read_list.heci_cb.cb_list, cb_list) {
> +
> + file_ext_list_temp = (struct heci_file_private *)
> + priv_cb_pos->file_private;
> +
> + if ((file_ext_list_temp != NULL) &&
> + heci_fe_same_id(file_ext, file_ext_list_temp))
> + return priv_cb_pos;
> +
> + }
> + }
> + return NULL;
> +}
> +
> +/**
> + * heci_read - the read client message function.
> + *
> + * @file: pointer to file structure
> + * @ubuf: pointer to user buffer
> + * @length: buffer length
> + * @offset: data offset in buffer
> + *
> + * returns >=0 data length on success , <0 on error
> + */
> +static ssize_t heci_read(struct file *file, char __user *ubuf,
> + size_t length, loff_t *offset)
> +{
> + int i;
> + int rets = 0, err = 0;
> + int if_num = iminor(file->f_dentry->d_inode);
> + struct heci_file_private *file_ext = file->private_data;
> + struct heci_cb_private *priv_cb_pos = NULL;
> + struct heci_cb_private *priv_cb = NULL;
> + struct iamt_heci_device *dev;
> +
> + if (!heci_device)
?
> + return -ENODEV;
> +
> + dev = pci_get_drvdata(heci_device);
> + if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
?
> + return -ENODEV;
> +
> + spin_lock_bh(&dev->device_lock);
> + if (dev->heci_state != HECI_ENABLED) {
> + spin_unlock_bh(&dev->device_lock);
> + return -ENODEV;
> + }
> + spin_unlock_bh(&dev->device_lock);
Is this racy? Wat prevents dev->heci_state from getting set to
something other than HECI_ENABLED just after we dropped the lock?
If that's a cant-happen, then is the locking needed?
> + spin_lock(&file_ext->file_lock);
> + if ((file_ext->sm_state & HECI_WD_STATE_INDEPENDENCE_MSG_SENT) == 0) {
> + spin_unlock(&file_ext->file_lock);
> + /* Do not allow to read watchdog client */
> + for (i = 0; i < dev->num_heci_me_clients; i++) {
> + if (memcmp(&heci_wd_guid,
> + &dev->me_clients[i].props.protocol_name,
> + sizeof(struct guid)) == 0) {
> + if (file_ext->me_client_id ==
> + dev->me_clients[i].client_id)
> + return -EBADF;
> + }
> + }
> + } else {
> + file_ext->sm_state &= ~HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
> + spin_unlock(&file_ext->file_lock);
> + }
> +
> + if (file_ext == &dev->iamthif_file_ext) {
I wonder what this "file_ext" concept is.
> + rets = pthi_read(dev, if_num, file, ubuf, length, offset);
> + goto out;
> + }
> +
> + if (file_ext->read_cb && file_ext->read_cb->information > *offset) {
> + priv_cb = file_ext->read_cb;
> + goto copy_buffer;
> + } else if (file_ext->read_cb && file_ext->read_cb->information > 0 &&
> + file_ext->read_cb->information <= *offset) {
> + priv_cb = file_ext->read_cb;
> + rets = 0;
> + goto free;
> + } else if ((!file_ext->read_cb || file_ext->read_cb->information == 0)
> + && *offset > 0) {
> + /*Offset needs to be cleaned for contingous reads*/
> + *offset = 0;
> + rets = 0;
> + goto out;
> + }
> +
> + spin_lock(&file_ext->read_io_lock);
> + err = heci_start_read(dev, if_num, file_ext);
> + if (err != 0 && err != -EBUSY) {
> + DBG("heci start read failure with status = %d\n", err);
> + spin_unlock(&file_ext->read_io_lock);
> + rets = err;
> + goto out;
> + }
> + if (HECI_READ_COMPLETE != file_ext->reading_state
> + && !waitqueue_active(&file_ext->rx_wait)) {
> + if (file->f_flags & O_NONBLOCK) {
> + rets = -EAGAIN;
> + spin_unlock(&file_ext->read_io_lock);
> + goto out;
> + }
> + spin_unlock(&file_ext->read_io_lock);
> +
> + if (wait_event_interruptible(file_ext->rx_wait,
> + (HECI_READ_COMPLETE == file_ext->reading_state
> + || HECI_FILE_INITIALIZING == file_ext->state
> + || HECI_FILE_DISCONNECTED == file_ext->state
> + || HECI_FILE_DISCONNECTING == file_ext->state))) {
> + if (signal_pending(current)) {
> + rets = -EINTR;
> + goto out;
> + }
> + return -ERESTARTSYS;
Should we be returning -ERESTARTSYS if !signal_pending()?
> + }
> +
> + if (HECI_FILE_INITIALIZING == file_ext->state ||
> + HECI_FILE_DISCONNECTED == file_ext->state ||
> + HECI_FILE_DISCONNECTING == file_ext->state) {
> + rets = -EBUSY;
> + goto out;
> + }
> + spin_lock(&file_ext->read_io_lock);
> + }
> +
> + priv_cb = file_ext->read_cb;
> +
> + if (!priv_cb) {
> + spin_unlock(&file_ext->read_io_lock);
> + return -ENODEV;
> + }
> + if (file_ext->reading_state != HECI_READ_COMPLETE) {
> + spin_unlock(&file_ext->read_io_lock);
> + return 0;
> + }
> + spin_unlock(&file_ext->read_io_lock);
> + /* now copy the data to user space */
> +copy_buffer:
> + DBG("priv_cb->response_buffer size - %d\n",
> + priv_cb->response_buffer.size);
> + DBG("priv_cb->information - %lu\n",
> + priv_cb->information);
> + if (length == 0 || ubuf == NULL ||
> + *offset > priv_cb->information) {
I don't think `length == 0' is possible here.
If the user passed in a NULL pointer then the appropriate return is
-EFAULT, not -EMSGSIZE.
But we shouldn't assume that zero is an illegal address. Just let
copy_to_user() take care of it.
> + rets = -EMSGSIZE;
> + goto free;
> + }
> +
> + /* length is being turncated to PAGE_SIZE, however, */
> + /* information size may be longer */
> + length = (length < (priv_cb->information - *offset) ?
> + length : (priv_cb->information - *offset));
> +
> + if (copy_to_user(ubuf,
> + priv_cb->response_buffer.data + *offset,
> + length)) {
> + rets = -EFAULT;
> + goto free;
We don't handle partial copies?
The usual read() behaviour is to return a short read, and only return
-EFOO if zero bytes were copied out to userspace.
> + }
> +
> + rets = length;
> + *offset += length;
> + if ((unsigned long)*offset < priv_cb->information)
> + goto out;
> +
> +free:
> + spin_lock_bh(&dev->device_lock);
> + priv_cb_pos = find_read_list_entry(dev, file_ext);
> + /* Remove entry from read list */
> + if (priv_cb_pos != NULL)
> + list_del(&priv_cb_pos->cb_list);
> + spin_unlock_bh(&dev->device_lock);
> + heci_free_cb_private(priv_cb);
> + spin_lock(&file_ext->read_io_lock);
> + file_ext->reading_state = HECI_IDLE;
> + file_ext->read_cb = NULL;
> + file_ext->read_pending = 0;
> + spin_unlock(&file_ext->read_io_lock);
> +out: DBG("end heci read rets= %d\n", rets);
> + return rets;
> +}
> +
> +/**
> + * heci_write - the write function.
> + *
> + * @file: pointer to file structure
> + * @ubuf: pointer to user buffer
> + * @length: buffer length
> + * @offset: data offset in buffer
> + *
> + * returns >=0 data length on success , <0 on error
> + */
> +static ssize_t heci_write(struct file *file, const char __user *ubuf,
> + size_t length, loff_t *offset)
> +{
> + int rets = 0;
> + __u8 i;
> + int if_num = iminor(file->f_dentry->d_inode);
> + struct heci_file_private *file_ext = file->private_data;
> + struct heci_cb_private *priv_write_cb = NULL;
> + struct heci_msg_hdr heci_hdr;
> + struct iamt_heci_device *dev;
> + unsigned long currtime = get_seconds();
> +
> + if (!heci_device)
?
> + return -ENODEV;
> +
> + dev = pci_get_drvdata(heci_device);
> +
> + if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
?
> + return -ENODEV;
> +
> + spin_lock_bh(&dev->device_lock);
> +
> + if (dev->heci_state != HECI_ENABLED) {
> + spin_unlock_bh(&dev->device_lock);
> + return -ENODEV;
> + }
> + if (file_ext == &dev->iamthif_file_ext) {
> + priv_write_cb = find_pthi_read_list_entry(dev, file);
> + if ((priv_write_cb != NULL) &&
> + (((currtime - priv_write_cb->read_time) >
> + IAMTHIF_READ_TIMER) ||
> + (file_ext->reading_state == HECI_READ_COMPLETE))) {
> + (*offset) = 0;
> + list_del(&priv_write_cb->cb_list);
> + heci_free_cb_private(priv_write_cb);
> + priv_write_cb = NULL;
> + }
> + }
> +
> + /* free entry used in read */
> + if (file_ext->reading_state == HECI_READ_COMPLETE) {
> + *offset = 0;
> + priv_write_cb = find_read_list_entry(dev, file_ext);
> + if (priv_write_cb != NULL) {
> + list_del(&priv_write_cb->cb_list);
> + heci_free_cb_private(priv_write_cb);
> + priv_write_cb = NULL;
> + spin_lock(&file_ext->read_io_lock);
> + file_ext->reading_state = HECI_IDLE;
> + file_ext->read_cb = NULL;
> + file_ext->read_pending = 0;
> + spin_unlock(&file_ext->read_io_lock);
> + }
> + } else if (file_ext->reading_state == HECI_IDLE &&
> + file_ext->read_pending == 0)
> + (*offset) = 0;
> +
> + spin_unlock_bh(&dev->device_lock);
> +
> + priv_write_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
> + if (!priv_write_cb)
> + return -ENOMEM;
> +
> + priv_write_cb->file_object = file;
> + priv_write_cb->file_private = file_ext;
> + priv_write_cb->request_buffer.data = kmalloc(length, GFP_KERNEL);
> + if (!priv_write_cb->request_buffer.data) {
> + kfree(priv_write_cb);
> + return -ENOMEM;
> + }
> + DBG("length =%d\n", (int) length);
> +
> + if (copy_from_user(priv_write_cb->request_buffer.data,
> + ubuf, length)) {
> + rets = -EFAULT;
> + goto fail;
> + }
Various dittoes.
> + spin_lock(&file_ext->file_lock);
> + file_ext->sm_state = 0;
> + if ((length == 4) &&
> + ((memcmp(heci_wd_state_independence_msg[0], ubuf, 4) == 0) ||
> + (memcmp(heci_wd_state_independence_msg[1], ubuf, 4) == 0) ||
> + (memcmp(heci_wd_state_independence_msg[2], ubuf, 4) == 0)))
> + file_ext->sm_state |= HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
> + spin_unlock(&file_ext->file_lock);
> +
> + INIT_LIST_HEAD(&priv_write_cb->cb_list);
> + if (file_ext == &dev->iamthif_file_ext) {
> + priv_write_cb->response_buffer.data =
> + kmalloc(IAMTHIF_MTU, GFP_KERNEL);
> + if (!priv_write_cb->response_buffer.data) {
> + rets = -ENOMEM;
> + goto fail;
> + }
> + spin_lock_bh(&dev->device_lock);
> + if (dev->heci_state != HECI_ENABLED) {
> + spin_unlock_bh(&dev->device_lock);
> + rets = -ENODEV;
> + goto fail;
> + }
> + for (i = 0; i < dev->num_heci_me_clients; i++) {
> + if (dev->me_clients[i].client_id ==
> + dev->iamthif_file_ext.me_client_id)
> + break;
> + }
> +
> + BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
> + if ((i == dev->num_heci_me_clients) ||
> + (dev->me_clients[i].client_id !=
> + dev->iamthif_file_ext.me_client_id)) {
> +
> + spin_unlock_bh(&dev->device_lock);
> + rets = -ENODEV;
> + goto fail;
> + } else if ((length > dev->me_clients[i].props.max_msg_length)
> + || (length <= 0)) {
> + spin_unlock_bh(&dev->device_lock);
> + rets = -EMSGSIZE;
> + goto fail;
Are you sure none of these error paths are leaking resources?
> + }
> +
> +
> + priv_write_cb->response_buffer.size = IAMTHIF_MTU;
> + priv_write_cb->major_file_operations = HECI_IOCTL;
> + priv_write_cb->information = 0;
> + priv_write_cb->request_buffer.size = length;
> + if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
> + spin_unlock_bh(&dev->device_lock);
> + rets = -ENODEV;
> + goto fail;
> + }
> +
> + if (!list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)
> + || dev->iamthif_state != HECI_IAMTHIF_IDLE) {
> + DBG("pthi_state = %d\n", (int) dev->iamthif_state);
> + DBG("add PTHI cb to pthi cmd waiting list\n");
> + list_add_tail(&priv_write_cb->cb_list,
> + &dev->pthi_cmd_list.heci_cb.cb_list);
> + rets = length;
> + } else {
> + DBG("call pthi write\n");
> + rets = pthi_write(dev, priv_write_cb);
> +
> + if (rets != 0) {
> + DBG("pthi write failed with status = %d\n",
> + rets);
> + spin_unlock_bh(&dev->device_lock);
> + goto fail;
> + }
> + rets = length;
> + }
> + spin_unlock_bh(&dev->device_lock);
> + return rets;
> + }
> +
> + priv_write_cb->major_file_operations = HECI_WRITE;
> + /* make sure information is zero before we start */
> +
> + priv_write_cb->information = 0;
> + priv_write_cb->request_buffer.size = length;
> +
> + spin_lock(&file_ext->write_io_lock);
> + DBG("host client = %d, ME client = %d\n",
> + file_ext->host_client_id, file_ext->me_client_id);
> + if (file_ext->state != HECI_FILE_CONNECTED) {
> + rets = -ENODEV;
> + DBG("host client = %d, is not connected to ME client = %d",
> + file_ext->host_client_id,
> + file_ext->me_client_id);
> +
> + goto unlock;
> + }
> + for (i = 0; i < dev->num_heci_me_clients; i++) {
> + if (dev->me_clients[i].client_id ==
> + file_ext->me_client_id)
Please don't put line breaks where they are unneeded.
This doesn't look very efficient.
> + break;
> + }
> + BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
> + if (i == dev->num_heci_me_clients) {
> + rets = -ENODEV;
> + goto unlock;
> + }
> + if (length > dev->me_clients[i].props.max_msg_length || length <= 0) {
> + rets = -EINVAL;
> + goto unlock;
> + }
Somewhat strange behaviour for a write() handler, but understandable.
It would all benefit from some documentation.
> + priv_write_cb->file_private = file_ext;
> +
> + spin_lock_bh(&dev->device_lock);
> + if (flow_ctrl_creds(dev, file_ext) &&
> + dev->host_buffer_is_empty) {
> + spin_unlock_bh(&dev->device_lock);
> + dev->host_buffer_is_empty = 0;
> + if (length > ((((dev->host_hw_state & H_CBD) >> 24) *
> + sizeof(__u32)) - sizeof(struct heci_msg_hdr))) {
> +
> + heci_hdr.length =
> + (((dev->host_hw_state & H_CBD) >> 24) *
> + sizeof(__u32)) -
> + sizeof(struct heci_msg_hdr);
> + heci_hdr.msg_complete = 0;
> + } else {
> + heci_hdr.length = length;
> + heci_hdr.msg_complete = 1;
> + }
> + heci_hdr.host_addr = file_ext->host_client_id;
> + heci_hdr.me_addr = file_ext->me_client_id;
> + heci_hdr.reserved = 0;
> + DBG("call heci_write_message header=%08x.\n",
> + *((__u32 *) &heci_hdr));
> + spin_unlock(&file_ext->write_io_lock);
> + /* protect heci low level write */
> + spin_lock_bh(&dev->device_lock);
> + if (!heci_write_message(dev, &heci_hdr,
> + (unsigned char *) (priv_write_cb->request_buffer.data),
> + heci_hdr.length)) {
> +
> + spin_unlock_bh(&dev->device_lock);
> + heci_free_cb_private(priv_write_cb);
> + rets = -ENODEV;
> + priv_write_cb->information = 0;
> + return rets;
> + }
> + file_ext->writing_state = HECI_WRITING;
> + priv_write_cb->information = heci_hdr.length;
> + if (heci_hdr.msg_complete) {
> + flow_ctrl_reduce(dev, file_ext);
> + list_add_tail(&priv_write_cb->cb_list,
> + &dev->write_waiting_list.heci_cb.cb_list);
> + } else {
> + list_add_tail(&priv_write_cb->cb_list,
> + &dev->write_list.heci_cb.cb_list);
> + }
> + spin_unlock_bh(&dev->device_lock);
> +
> + } else {
> +
> + spin_unlock_bh(&dev->device_lock);
> + priv_write_cb->information = 0;
> + file_ext->writing_state = HECI_WRITING;
> + spin_unlock(&file_ext->write_io_lock);
> + list_add_tail(&priv_write_cb->cb_list,
> + &dev->write_list.heci_cb.cb_list);
> + }
> + return length;
> +
> +unlock:
> + spin_unlock(&file_ext->write_io_lock);
> +fail:
> + heci_free_cb_private(priv_write_cb);
> + return rets;
> +
> +}
> +
> +/**
> + * heci_ioctl - the IOCTL function
> + *
> + * @inode: pointer to inode structure
> + * @file: pointer to file structure
> + * @cmd: ioctl command
> + * @data: pointer to heci message structure
> + *
> + * returns 0 on success , <0 on error
> + */
> +static int heci_ioctl(struct inode *inode, struct file *file,
> + unsigned int cmd, unsigned long data)
> +{
> + int rets = 0;
> + int if_num = iminor(inode);
> + struct heci_file_private *file_ext = file->private_data;
> + /* in user space */
> + struct heci_message_data *u_msg = (struct heci_message_data *) data;
Shouldn't this be a __user pointer?
This matters. Please get the __user annotations correct, then check it
all with sparse. That includes heci_message_data.data.
> + struct heci_message_data k_msg; /* all in kernel on the stack */
> + struct iamt_heci_device *dev;
> +
> + if (!capable(CAP_SYS_ADMIN))
> + return -EPERM;
> +
> + if (!heci_device)
?
> + return -ENODEV;
> +
> + dev = pci_get_drvdata(heci_device);
> + if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
?
> + return -ENODEV;
> +
> + spin_lock_bh(&dev->device_lock);
> + if (dev->heci_state != HECI_ENABLED) {
> + spin_unlock_bh(&dev->device_lock);
> + return -ENODEV;
> + }
> + spin_unlock_bh(&dev->device_lock);
> +
> + /* first copy from user all data needed */
> + if (copy_from_user(&k_msg, u_msg, sizeof(k_msg))) {
Is all of this untrusted data coming from userspace exhaustively checked?
> + DBG("first copy from user all data needed filled\n");
> + return -EFAULT;
> + }
> + DBG("user message size is %d\n", k_msg.size);
> +
> + switch (cmd) {
> + case IOCTL_HECI_GET_VERSION:
> + DBG(": IOCTL_HECI_GET_VERSION\n");
> + rets = heci_ioctl_get_version(dev, if_num, u_msg, k_msg,
> + file_ext);
> + break;
> +
> + case IOCTL_HECI_CONNECT_CLIENT:
> + DBG(": IOCTL_HECI_CONNECT_CLIENT.\n");
> + rets = heci_ioctl_connect_client(dev, if_num, u_msg, k_msg,
> + file);
> + break;
> +
> + case IOCTL_HECI_WD:
> + DBG(": IOCTL_HECI_WD.\n");
> + rets = heci_ioctl_wd(dev, if_num, k_msg, file_ext);
> + break;
> +
> + case IOCTL_HECI_BYPASS_WD:
> + DBG(": IOCTL_HECI_BYPASS_WD.\n");
> + rets = heci_ioctl_bypass_wd(dev, if_num, k_msg, file_ext);
> + break;
> +
> + default:
> + rets = -EINVAL;
-ENOTTY, I believe.
> + break;
> + }
> + return rets;
> +}
> +
> +/**
> + * heci_poll - the poll function
> + *
> + * @file: pointer to file structure
> + * @wait: pointer to poll_table structure
> + *
> + * returns poll mask
> + */
> +static unsigned int heci_poll(struct file *file, poll_table *wait)
> +{
> + int if_num = iminor(file->f_dentry->d_inode);
> + unsigned int mask = 0;
> + struct heci_file_private *file_ext = file->private_data;
> + struct iamt_heci_device *dev;
> +
> + if (!heci_device)
?
> + return mask;
> +
> + dev = pci_get_drvdata(heci_device);
> +
> + if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
?
> + return mask;
> +
> + spin_lock_bh(&dev->device_lock);
> + if (dev->heci_state != HECI_ENABLED) {
> + spin_unlock_bh(&dev->device_lock);
> + return mask;
> + }
> + spin_unlock_bh(&dev->device_lock);
> +
> + if (file_ext == &dev->iamthif_file_ext) {
> + poll_wait(file, &dev->iamthif_file_ext.wait, wait);
> + spin_lock(&dev->iamthif_file_ext.file_lock);
> + if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE
> + && dev->iamthif_file_object == file) {
> + mask |= (POLLIN | POLLRDNORM);
> + spin_lock_bh(&dev->device_lock);
> + DBG("run next pthi cb\n");
> + run_next_iamthif_cmd(dev);
> + spin_unlock_bh(&dev->device_lock);
> + }
> + spin_unlock(&dev->iamthif_file_ext.file_lock);
> +
Stray newline
> + } else{
checkpatch missed this coding-style error.
> + poll_wait(file, &file_ext->tx_wait, wait);
> + spin_lock(&file_ext->write_io_lock);
> + if (HECI_WRITE_COMPLETE == file_ext->writing_state)
> + mask |= (POLLIN | POLLRDNORM);
> +
> + spin_unlock(&file_ext->write_io_lock);
> + }
> +
> + return mask;
> +}
> +
> +#ifdef CONFIG_PM
> +static int heci_suspend(struct pci_dev *pdev, pm_message_t state)
> +{
> + struct iamt_heci_device *dev = pci_get_drvdata(pdev);
> + int err = 0;
> +
> + spin_lock_bh(&dev->device_lock);
> + if (dev->reinit_tsk != NULL) {
> + kthread_stop(dev->reinit_tsk);
can't run kthread_stop() under spinlock.
> + dev->reinit_tsk = NULL;
> + }
> + spin_unlock_bh(&dev->device_lock);
> +
> + /* Stop watchdog if exists */
> + del_timer_sync(&dev->wd_timer);
> + if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
> + && dev->wd_timeout) {
> + spin_lock_bh(&dev->device_lock);
> + g_sus_wd_timeout = dev->wd_timeout;
> + dev->wd_timeout = 0;
> + dev->wd_due_counter = 0;
> + memcpy(dev->wd_data, heci_stop_wd_params,
> + HECI_WD_PARAMS_SIZE);
> + dev->stop = 1;
> + if (dev->host_buffer_is_empty &&
> + flow_ctrl_creds(dev, &dev->wd_file_ext)) {
> + dev->host_buffer_is_empty = 0;
> + if (!heci_send_wd(dev))
> + DBG("send stop WD failed\n");
> + else
> + flow_ctrl_reduce(dev, &dev->wd_file_ext);
> +
> + dev->wd_pending = 0;
> + } else {
> + dev->wd_pending = 1;
> + }
> + spin_unlock_bh(&dev->device_lock);
> + dev->wd_stoped = 0;
> +
> + err = wait_event_interruptible_timeout(dev->wait_stop_wd,
> + (dev->wd_stoped),
> + 10 * HZ);
> + if (!dev->wd_stoped)
> + DBG("stop wd failed to complete.\n");
> + else {
> + DBG("stop wd complete %d.\n", err);
> + err = 0;
> + }
Could we use plain old kthread_stop() here?
> + }
> + /* Set new heci state */
> + spin_lock_bh(&dev->device_lock);
> + if (dev->heci_state == HECI_ENABLED ||
> + dev->heci_state == HECI_RECOVERING_FROM_RESET) {
> + dev->heci_state = HECI_POWER_DOWN;
> + heci_reset(dev, 0);
> + }
> + spin_unlock_bh(&dev->device_lock);
> +
> + pci_save_state(pdev);
> +
> + pci_disable_device(pdev);
> + free_irq(pdev->irq, dev);
> +
> + pci_set_power_state(pdev, PCI_D3hot);
> +
> + return err;
> +}
> +
> +static int heci_resume(struct pci_dev *pdev)
> +{
> + struct iamt_heci_device *dev;
> + int err = 0;
> +
> + pci_set_power_state(pdev, PCI_D0);
> + pci_restore_state(pdev);
> +
> + dev = pci_get_drvdata(pdev);
> + if (!dev)
> + return -ENODEV;
> +
> + /* request and enable interrupt */
> + err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
> + heci_driver_name, dev);
> + if (err) {
> + printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
> + pdev->irq);
> + return err;
> + }
> +
> + spin_lock_bh(&dev->device_lock);
> + dev->heci_state = HECI_POWER_UP;
> + heci_reset(dev, 1);
> + spin_unlock_bh(&dev->device_lock);
> +
> + /* Start watchdog if stopped in suspend */
> + if (g_sus_wd_timeout != 0) {
> + dev->wd_timeout = g_sus_wd_timeout;
> +
> + memcpy(dev->wd_data, heci_start_wd_params,
> + HECI_WD_PARAMS_SIZE);
> + memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
> + &dev->wd_timeout, sizeof(__u16));
> + dev->wd_due_counter = 1;
> +
> + if (dev->wd_timeout)
> + mod_timer(&dev->wd_timer, jiffies);
> +
> + g_sus_wd_timeout = 0;
> + }
> + return err;
> +}
> +#endif
> +
> +MODULE_AUTHOR("Intel Corporation");
> +MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
> +MODULE_LICENSE("Dual BSD/GPL");
> +MODULE_VERSION(HECI_DRIVER_VERSION);
> diff --git a/drivers/char/heci/heci_version.h b/drivers/char/heci/heci_version.h
> new file mode 100644
> index 0000000..797e84e
> --- /dev/null
> +++ b/drivers/char/heci/heci_version.h
> @@ -0,0 +1,54 @@
> +/*
> + * Part of Intel(R) Manageability Engine Interface Linux driver
> + *
> + * Copyright (c) 2003 - 2008 Intel Corp.
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + * 1. Redistributions of source code must retain the above copyright
> + * notice, this list of conditions, and the following disclaimer,
> + * without modification.
> + * 2. Redistributions in binary form must reproduce at minimum a disclaimer
> + * substantially similar to the "NO WARRANTY" disclaimer below
> + * ("Disclaimer") and any redistribution must be conditioned upon
> + * including a substantially similar Disclaimer requirement for further
> + * binary redistribution.
> + * 3. Neither the names of the above-listed copyright holders nor the names
> + * of any contributors may be used to endorse or promote products derived
> + * from this software without specific prior written permission.
> + *
> + * Alternatively, this software may be distributed under the terms of the
> + * GNU General Public License ("GPL") version 2 as published by the Free
> + * Software Foundation.
> + *
> + * NO WARRANTY
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
> + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
> + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
> + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> + * POSSIBILITY OF SUCH DAMAGES.
> + *
> + */
> +
> +#ifndef HECI_VERSION_H
> +#define HECI_VERSION_H
> +
> +#define MAJOR_VERSION 5
> +#define MINOR_VERSION 0
> +#define QUICK_FIX_NUMBER 0
> +#define VER_BUILD 30
> +
> +#define HECI_DRV_VER1 __stringify(MAJOR_VERSION) "." __stringify(MINOR_VERSION)
> +#define HECI_DRV_VER2 __stringify(QUICK_FIX_NUMBER) "." __stringify(VER_BUILD)
> +
> +#define HECI_DRIVER_VERSION HECI_DRV_VER1 "." HECI_DRV_VER2
There's really little point in doing this. As soon as the driver hits
mainline, the version number becomes meaningless. Other people will
change it and won't update the version number. And even if this
driver's source remains unchanged, other parts of the kernel upon which
it depends will change.
So this string becomes useless and the only interesting question
becomes "which kernel version". Because that is the only means by
which support people can recreate the supportee's driver source.
> +#endif
> diff --git a/drivers/char/heci/interrupt.c b/drivers/char/heci/interrupt.c
> new file mode 100644
> index 0000000..aacd262
> --- /dev/null
> +++ b/drivers/char/heci/interrupt.c
> @@ -0,0 +1,1553 @@
> +/*
> + * Part of Intel(R) Manageability Engine Interface Linux driver
> + *
> + * Copyright (c) 2003 - 2008 Intel Corp.
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + * 1. Redistributions of source code must retain the above copyright
> + * notice, this list of conditions, and the following disclaimer,
> + * without modification.
> + * 2. Redistributions in binary form must reproduce at minimum a disclaimer
> + * substantially similar to the "NO WARRANTY" disclaimer below
> + * ("Disclaimer") and any redistribution must be conditioned upon
> + * including a substantially similar Disclaimer requirement for further
> + * binary redistribution.
> + * 3. Neither the names of the above-listed copyright holders nor the names
> + * of any contributors may be used to endorse or promote products derived
> + * from this software without specific prior written permission.
> + *
> + * Alternatively, this software may be distributed under the terms of the
> + * GNU General Public License ("GPL") version 2 as published by the Free
> + * Software Foundation.
> + *
> + * NO WARRANTY
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
> + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
> + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
> + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> + * POSSIBILITY OF SUCH DAMAGES.
> + *
> + */
> +
> +#include <linux/kthread.h>
> +
> +#include "heci.h"
> +#include "heci_interface.h"
> +
> +/*
> + * interrupt function prototypes
> + */
> +static void heci_bh_handler(struct work_struct *work);
> +static int heci_bh_read_handler(struct io_heci_list *complete_list,
> + struct iamt_heci_device *dev,
> + __s32 *slots);
> +static int heci_bh_write_handler(struct io_heci_list *complete_list,
> + struct iamt_heci_device *dev,
> + __s32 *slots);
> +static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
> + struct heci_msg_hdr *heci_hdr);
> +static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
> + struct iamt_heci_device *dev,
> + struct heci_msg_hdr *heci_hdr);
> +static int heci_bh_read_client_message(struct io_heci_list *complete_list,
> + struct iamt_heci_device *dev,
> + struct heci_msg_hdr *heci_hdr);
> +static void heci_client_connect_response(struct iamt_heci_device *dev,
> + struct hbm_client_connect_response *connect_res);
> +static void heci_client_disconnect_response(struct iamt_heci_device *dev,
> + struct hbm_client_connect_response *disconnect_res);
> +static void heci_client_flow_control_response(struct iamt_heci_device *dev,
> + struct hbm_flow_control *flow_control);
> +static void heci_client_disconnect_request(struct iamt_heci_device *dev,
> + struct hbm_client_disconnect_request *disconnect_req);
> +
> +
> +/**
> + * heci_isr_interrupt - The ISR of the HECI device
> + *
> + * @irq: The irq number
> + * @dev_id: pointer to the device structure
> + *
> + * returns irqreturn_t
> + */
> +irqreturn_t heci_isr_interrupt(int irq, void *dev_id)
> +{
> + int err;
> + struct iamt_heci_device *dev = (struct iamt_heci_device *) dev_id;
Unneeded and undesirable cast of void*.
> + dev->host_hw_state = read_heci_register(dev, H_CSR);
> +
> + if ((dev->host_hw_state & H_IS) != H_IS)
> + return IRQ_NONE;
> +
> + /* disable interrupts */
> + heci_csr_disable_interrupts(dev);
> +
> + /*
> + * Our device interrupted, schedule work the heci_bh_handler
> + * to handle the interrupt processing. This needs to be a
> + * workqueue item since the handler can sleep.
> + */
> + PREPARE_WORK(&dev->work, heci_bh_handler);
> + DBG("schedule work the heci_bh_handler.\n");
> + err = schedule_work(&dev->work);
> + if (!err) {
> + printk(KERN_ERR "heci: schedule the heci_bh_handler"
> + " failed error=%x\n", err);
> + }
> + return IRQ_HANDLED;
> +}
> +
> +/**
> + * _heci_cmpl - process completed operation.
> + *
> + * @file_ext: private data of the file object.
> + * @priv_cb_pos: callback block.
> + */
> +static void _heci_cmpl(struct heci_file_private *file_ext,
> + struct heci_cb_private *priv_cb_pos)
> +{
> + if (priv_cb_pos->major_file_operations == HECI_WRITE) {
> + heci_free_cb_private(priv_cb_pos);
> + DBG("completing write call back.\n");
> + file_ext->writing_state = HECI_WRITE_COMPLETE;
> + if ((&file_ext->tx_wait) &&
> + waitqueue_active(&file_ext->tx_wait))
> + wake_up_interruptible(&file_ext->tx_wait);
> +
> + } else if (priv_cb_pos->major_file_operations == HECI_READ
> + && HECI_READING == file_ext->reading_state) {
> + DBG("completing read call back information= %lu\n",
> + priv_cb_pos->information);
> + file_ext->reading_state = HECI_READ_COMPLETE;
> + if ((&file_ext->rx_wait) &&
> + waitqueue_active(&file_ext->rx_wait))
> + wake_up_interruptible(&file_ext->rx_wait);
> +
> + }
> +}
> +
> +/**
> + * _heci_cmpl_iamthif - process completed iamthif operation.
> + *
> + * @dev: Device object for our driver.
> + * @priv_cb_pos: callback block.
> + */
> +static void _heci_cmpl_iamthif(struct iamt_heci_device *dev,
> + struct heci_cb_private *priv_cb_pos)
> +{
> + if (dev->iamthif_canceled != 1) {
> + dev->iamthif_state = HECI_IAMTHIF_READ_COMPLETE;
> + dev->iamthif_stall_timer = 0;
> + memcpy(priv_cb_pos->response_buffer.data,
> + dev->iamthif_msg_buf,
> + dev->iamthif_msg_buf_index);
> + list_add_tail(&priv_cb_pos->cb_list,
> + &dev->pthi_read_complete_list.heci_cb.cb_list);
> + DBG("pthi read completed.\n");
> + } else {
> + run_next_iamthif_cmd(dev);
> + }
> + if (&dev->iamthif_file_ext.wait) {
> + DBG("completing pthi call back.\n");
> + wake_up_interruptible(&dev->iamthif_file_ext.wait);
> + }
> +}
> +/**
> + * heci_bh_handler - function called after ISR to handle the interrupt
> + * processing.
> + *
> + * @work: pointer to the work structure
> + *
> + * NOTE: This function is called by schedule work
> + */
> +static void heci_bh_handler(struct work_struct *work)
"bh_handler" is not an appropriate name. A "bottom half" is an old
Linux name for something similar to a softirq. It is run in sort-of
interrupt context.
Hence this reader gets alarmed when he sees things like kthread_run()
being called from something which appears to be "bottom half" context.
> +{
> + struct iamt_heci_device *dev =
> + container_of(work, struct iamt_heci_device, work);
> + struct io_heci_list complete_list;
> + __s32 slots;
> + int rets;
> + struct heci_cb_private *cb_pos = NULL, *cb_next = NULL;
> + struct heci_file_private *file_ext;
> + int bus_message_received = 0;
> + struct task_struct *tsk;
> +
> + DBG("function called after ISR to handle the interrupt processing.\n");
> + /* initialize our complete list */
> + spin_lock_bh(&dev->device_lock);
> + heci_initialize_list(&complete_list, dev);
> + dev->host_hw_state = read_heci_register(dev, H_CSR);
> + dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
> +
> + /* check if ME wants a reset */
> + if (((dev->me_hw_state & ME_RDY_HRA) == 0)
> + && (dev->heci_state != HECI_RESETING)
> + && (dev->heci_state != HECI_INITIALIZING)) {
> + DBG("FW not ready.\n");
> + heci_reset(dev, 1);
> + spin_unlock_bh(&dev->device_lock);
> + return;
> + }
> +
> + /* check if we need to start the dev */
> + if ((dev->host_hw_state & H_RDY) == 0) {
> + if ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA) {
> + DBG("we need to start the dev.\n");
> + dev->host_hw_state |= (H_IE | H_IG | H_RDY);
> + heci_set_csr_register(dev);
> + if (dev->heci_state == HECI_INITIALIZING) {
> + dev->recvd_msg = 1;
> + spin_unlock_bh(&dev->device_lock);
> + wake_up_interruptible(&dev->wait_recvd_msg);
> + return;
> +
> + } else {
> + spin_unlock_bh(&dev->device_lock);
> + tsk = kthread_run(heci_task_initialize_clients,
> + dev, "heci_reinit");
> + if (IS_ERR(tsk)) {
> + int rc = PTR_ERR(tsk);
> + printk(KERN_WARNING "heci: Unable to"
> + "start the heci thread: %d\n", rc);
> + }
So... we schedule this function via schedule_work() then from here,
kick off a short-lived kernel thread?
> + return;
> + }
> + } else {
> + DBG("enable interrupt FW not ready.\n");
> + heci_csr_enable_interrupts(dev);
> + spin_unlock_bh(&dev->device_lock);
> + return;
> + }
> + }
> + /* check slots avalable for reading */
> + slots = count_full_read_slots(dev);
> + DBG("slots =%08x extra_write_index =%08x.\n",
> + slots, dev->extra_write_index);
> + while ((slots > 0) && (!dev->extra_write_index)) {
This driver has lots of over-parenthesisation.
> + DBG("slots =%08x extra_write_index =%08x.\n", slots,
> + dev->extra_write_index);
> + DBG("call heci_bh_read_handler.\n");
> + rets = heci_bh_read_handler(&complete_list, dev, &slots);
> + if (rets != 0)
> + goto end;
> + }
> + rets = heci_bh_write_handler(&complete_list, dev, &slots);
> +end:
> + DBG("end of bottom half function.\n");
> + dev->host_hw_state = read_heci_register(dev, H_CSR);
> + dev->host_buffer_is_empty = host_buffer_is_empty(dev);
> +
> + if ((dev->host_hw_state & H_IS) == H_IS) {
> + /* acknowledge interrupt and disable interrupts */
> + heci_csr_disable_interrupts(dev);
> +
> + PREPARE_WORK(&dev->work, heci_bh_handler);
> + DBG("schedule work the heci_bh_handler.\n");
> + rets = schedule_work(&dev->work);
it's usually the case that code which adds schedule_work() should also
add a cancel_work_sync() somewhere.
> + if (!rets) {
> + printk(KERN_ERR "heci: schedule the heci_bh_handler"
> + " failed error=%x\n", rets);
> + }
> + } else {
> + heci_csr_enable_interrupts(dev);
> + }
> +
> + if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) {
> + DBG("received waiting bus message\n");
> + bus_message_received = 1;
> + }
> + spin_unlock_bh(&dev->device_lock);
> + if (bus_message_received) {
> + DBG("wake up dev->wait_recvd_msg\n");
> + wake_up_interruptible(&dev->wait_recvd_msg);
> + bus_message_received = 0;
> + }
> + if ((complete_list.status != 0)
> + || list_empty(&complete_list.heci_cb.cb_list))
> + return;
> +
> +
> + list_for_each_entry_safe(cb_pos, cb_next,
> + &complete_list.heci_cb.cb_list, cb_list) {
> + file_ext = (struct heci_file_private *)cb_pos->file_private;
> + list_del(&cb_pos->cb_list);
> + if (file_ext != NULL) {
> + if (file_ext != &dev->iamthif_file_ext) {
> + DBG("completing call back.\n");
> + _heci_cmpl(file_ext, cb_pos);
> + cb_pos = NULL;
> + } else if (file_ext == &dev->iamthif_file_ext) {
> + _heci_cmpl_iamthif(dev, cb_pos);
> + }
> + }
> + }
> +}
> +
> +
> +/**
> + * heci_bh_read_handler - bottom half read routine after ISR to
> + * handle the read processing.
This isn't a "bottom half" function.
> + * @cmpl_list: An instance of our list structure
> + * @dev: Device object for our driver
> + * @slots: slots to read.
> + *
> + * returns 0 on success, <0 on failure.
> + */
> +static int heci_bh_read_handler(struct io_heci_list *cmpl_list,
> + struct iamt_heci_device *dev,
> + __s32 *slots)
> +{
> + struct heci_msg_hdr *heci_hdr;
> + int ret = 0;
> + struct heci_file_private *file_pos = NULL;
> + struct heci_file_private *file_next = NULL;
> +
> + if (!dev->rd_msg_hdr) {
> + dev->rd_msg_hdr = read_heci_register(dev, ME_CB_RW);
> + DBG("slots=%08x.\n", *slots);
> + (*slots)--;
> + DBG("slots=%08x.\n", *slots);
> + }
> + heci_hdr = (struct heci_msg_hdr *) &dev->rd_msg_hdr;
> + DBG("heci_hdr->length =%d\n", heci_hdr->length);
> +
> + if ((heci_hdr->reserved) || !(dev->rd_msg_hdr)) {
> + DBG("corrupted message header.\n");
> + ret = -ECORRUPTED_MESSAGE_HEADER;
> + goto end;
> + }
> +
> + if ((heci_hdr->host_addr) || (heci_hdr->me_addr)) {
> + list_for_each_entry_safe(file_pos, file_next,
> + &dev->file_list, link) {
> + DBG("list_for_each_entry_safe read host"
> + " client = %d, ME client = %d\n",
> + file_pos->host_client_id,
> + file_pos->me_client_id);
> + if ((file_pos->host_client_id == heci_hdr->host_addr)
> + && (file_pos->me_client_id == heci_hdr->me_addr))
> + break;
> + }
> +
> + if (&file_pos->link == &dev->file_list) {
> + DBG("corrupted message header\n");
> + ret = -ECORRUPTED_MESSAGE_HEADER;
> + goto end;
> + }
> + }
> + if (((*slots) * sizeof(__u32)) < heci_hdr->length) {
> + DBG("we can't read the message slots=%08x.\n", *slots);
> + /* we can't read the message */
> + ret = -ERANGE;
> + goto end;
> + }
> +
> + /* decide where to read the message too */
> + if (!heci_hdr->host_addr) {
> + DBG("call heci_bh_read_bus_message.\n");
> + heci_bh_read_bus_message(dev, heci_hdr);
> + DBG("end heci_bh_read_bus_message.\n");
> + } else if ((heci_hdr->host_addr == dev->iamthif_file_ext.host_client_id)
> + && (HECI_FILE_CONNECTED == dev->iamthif_file_ext.state)
> + && (dev->iamthif_state == HECI_IAMTHIF_READING)) {
> + DBG("call heci_bh_read_iamthif_message.\n");
> + DBG("heci_hdr->length =%d\n", heci_hdr->length);
> + ret = heci_bh_read_pthi_message(cmpl_list, dev, heci_hdr);
> + if (ret != 0)
> + goto end;
> +
> + } else {
> + DBG("call heci_bh_read_client_message.\n");
> + ret = heci_bh_read_client_message(cmpl_list, dev, heci_hdr);
> + if (ret != 0)
> + goto end;
> +
> + }
> +
> + /* reset the number of slots and header */
> + *slots = count_full_read_slots(dev);
> + dev->rd_msg_hdr = 0;
> +
> + if (*slots == -ESLOTS_OVERFLOW) {
> + /* overflow - reset */
> + DBG("reseting due to slots overflow.\n");
> + /* set the event since message has been read */
> + ret = -ERANGE;
> + goto end;
> + }
> +end:
> + return ret;
> +}
> +
> +
> +/**
> + * heci_bh_read_bus_message - bottom half read routine after ISR to
> + * handle the read bus message cmd processing.
> + *
> + * @dev: Device object for our driver
> + * @heci_hdr: header of bus message
> + */
> +static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
> + struct heci_msg_hdr *heci_hdr)
> +{
> + struct heci_bus_message *heci_msg;
> + struct hbm_host_version_response *version_res;
> + struct hbm_client_connect_response *connect_res;
> + struct hbm_client_connect_response *disconnect_res;
> + struct hbm_flow_control *flow_control;
> + struct hbm_props_response *props_res;
> + struct hbm_host_enum_response *enum_res;
> + struct hbm_client_disconnect_request *disconnect_req;
> + struct hbm_host_stop_request *h_stop_req;
> + int i;
> + unsigned char *buffer;
> +
> + /* read the message to our buffer */
> + buffer = (unsigned char *) dev->rd_msg_buf;
> + BUG_ON(heci_hdr->length >= sizeof(dev->rd_msg_buf));
> + heci_read_slots(dev, buffer, heci_hdr->length);
> + heci_msg = (struct heci_bus_message *) buffer;
> +
> + switch (*(__u8 *) heci_msg) {
> + case HOST_START_RES_CMD:
> + version_res = (struct hbm_host_version_response *) heci_msg;
This code does rather a lot of typecasting.
Is it all _really_ necessary? The C type/struct/union system is pretty
powerful and is easily mapped onto all sorts of real-world things.
> + if (version_res->host_version_supported) {
> + dev->version.major_version = HBM_MAJOR_VERSION;
> + dev->version.minor_version = HBM_MINOR_VERSION;
> + } else {
> + dev->version = version_res->me_max_version;
> + }
> + dev->recvd_msg = 1;
> + DBG("host start response message received.\n");
> + break;
> +
> + case CLIENT_CONNECT_RES_CMD:
> + connect_res =
> + (struct hbm_client_connect_response *) heci_msg;
> + heci_client_connect_response(dev, connect_res);
> + DBG("client connect response message received.\n");
> + wake_up(&dev->wait_recvd_msg);
> + break;
> +
> + case CLIENT_DISCONNECT_RES_CMD:
> + disconnect_res =
> + (struct hbm_client_connect_response *) heci_msg;
> + heci_client_disconnect_response(dev, disconnect_res);
> + DBG("client disconnect response message received.\n");
> + wake_up(&dev->wait_recvd_msg);
> + break;
> +
> + case HECI_FLOW_CONTROL_CMD:
> + flow_control = (struct hbm_flow_control *) heci_msg;
> + heci_client_flow_control_response(dev, flow_control);
> + DBG("client flow control response message received.\n");
> + break;
> +
> + case HOST_CLIENT_PROPERTEIS_RES_CMD:
> + props_res = (struct hbm_props_response *) heci_msg;
> + if (props_res->status != 0) {
> + BUG();
> + break;
> + }
> + for (i = 0; i < dev->num_heci_me_clients; i++) {
> + if (dev->me_clients[i].client_id ==
> + props_res->address) {
> + dev->me_clients[i].props =
> + props_res->client_properties;
> + break;
> + }
> +
> + }
> + dev->recvd_msg = 1;
> + break;
> +
> + case HOST_ENUM_RES_CMD:
> + enum_res = (struct hbm_host_enum_response *) heci_msg;
> + memcpy(dev->heci_me_clients, enum_res->valid_addresses, 32);
> + dev->recvd_msg = 1;
> + break;
> +
> + case HOST_STOP_RES_CMD:
> + dev->heci_state = HECI_DISABLED;
> + DBG("reseting because of FW stop response.\n");
> + heci_reset(dev, 1);
> + break;
> +
> + case CLIENT_DISCONNECT_REQ_CMD:
> + /* search for client */
> + disconnect_req =
> + (struct hbm_client_disconnect_request *) heci_msg;
> + heci_client_disconnect_request(dev, disconnect_req);
> + break;
> +
> + case ME_STOP_REQ_CMD:
> + /* prepare stop request */
> + heci_hdr = (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
> + heci_hdr->host_addr = 0;
> + heci_hdr->me_addr = 0;
> + heci_hdr->length = sizeof(struct hbm_host_stop_request);
> + heci_hdr->msg_complete = 1;
> + heci_hdr->reserved = 0;
> + h_stop_req =
> + (struct hbm_host_stop_request *) &dev->ext_msg_buf[1];
> + memset(h_stop_req, 0, sizeof(struct hbm_host_stop_request));
> + h_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
> + h_stop_req->reason = DRIVER_STOP_REQUEST;
> + h_stop_req->reserved[0] = 0;
> + h_stop_req->reserved[1] = 0;
> + dev->extra_write_index = 2;
> + break;
> +
> + default:
> + BUG();
> + break;
> +
> + }
> +}
> +
> +/**
> + * heci_bh_read_pthi_message - bottom half read routine after ISR to
> + * handle the read pthi message data processing.
> + *
> + * @complete_list: An instance of our list structure
> + * @dev: Device object for our driver
> + * @heci_hdr: header of pthi message
> + *
> + * returns 0 on success, <0 on failure.
> + */
> +static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
> + struct iamt_heci_device *dev,
> + struct heci_msg_hdr *heci_hdr)
> +{
> + struct heci_file_private *file_ext;
> + struct heci_cb_private *priv_cb;
> + unsigned char *buffer;
> +
> + BUG_ON(heci_hdr->me_addr != dev->iamthif_file_ext.me_client_id);
> + BUG_ON(dev->iamthif_state != HECI_IAMTHIF_READING);
> +
> + buffer = (unsigned char *) (dev->iamthif_msg_buf +
> + dev->iamthif_msg_buf_index);
> + BUG_ON(sizeof(dev->iamthif_msg_buf) <
> + (dev->iamthif_msg_buf_index + heci_hdr->length));
> +
> + heci_read_slots(dev, buffer, heci_hdr->length);
> +
> + dev->iamthif_msg_buf_index += heci_hdr->length;
> +
> + if (!(heci_hdr->msg_complete))
> + return 0;
> +
> + DBG("pthi_message_buffer_index=%d\n", heci_hdr->length);
> + DBG("completed pthi read.\n ");
> + if (!dev->iamthif_current_cb)
> + return -ENODEV;
> +
> + priv_cb = dev->iamthif_current_cb;
> + dev->iamthif_current_cb = NULL;
> +
> + file_ext = (struct heci_file_private *)priv_cb->file_private;
> + if (!file_ext)
> + return -ENODEV;
> +
> + dev->iamthif_stall_timer = 0;
> + priv_cb->information = dev->iamthif_msg_buf_index;
> + priv_cb->read_time = get_seconds();
> + if ((dev->iamthif_ioctl) && (file_ext == &dev->iamthif_file_ext)) {
> + /* found the iamthif cb */
> + DBG("complete the pthi read cb.\n ");
> + if (&dev->iamthif_file_ext) {
> + DBG("add the pthi read cb to complete.\n ");
> + list_add_tail(&priv_cb->cb_list,
> + &complete_list->heci_cb.cb_list);
> + }
> + }
> + return 0;
> +}
My attention span just expired, sorry.
>
> ...
>
> + dev->heci_host_clients[file_ext->host_client_id / 8] &=
> + ~(1 << (file_ext->host_client_id % 8));
__set_bit()?
>
> ...
>
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-07-23 18:00 ` Marcin Obara
@ 2008-08-11 19:23 ` Marcin Obara
2008-08-12 4:53 ` Andrew Morton
2008-08-13 0:58 ` Greg KH
0 siblings, 2 replies; 42+ messages in thread
From: Marcin Obara @ 2008-08-11 19:23 UTC (permalink / raw)
To: linux-kernel; +Cc: Pavel Machek, Andrew Morton
Fixes small issues (2 comment and 2 variable type changes)
raised by Pavel Machek since previous LKML submition.
The Intel Management Engine Interface (aka HECI: Host Embedded
Controller Interface ) enables communication between the host OS and
the Management Engine firmware. MEI is bi-directional, and either the
host or Intel AMT firmware can initiate transactions.
The core hardware architecture of Intel Active Management Technology
(Intel AMT) is resident in firmware. The micro-controller within the
chipset's graphics and memory controller (GMCH) hub houses the
Management Engine (ME) firmware, which implements various services
on behalf of management applications.
Some of the ME subsystems that can be access via MEI driver:
- Intel(R) Quiet System Technology (QST) is implemented as a firmware
subsystem that runs in the ME. Programs that wish to expose the
health monitoring and fan speed control capabilities of Intel(R) QST
will need to use the MEI driver to communicate with the ME sub-system.
- ASF is the "Alert Standard Format" which is an DMTF manageability
standard. It is implemented in the PC's hardware and firmware, and is
managed from a remote console.
Most recent Intel desktop chipsets have one or more of the above ME
services. The MEI driver will make it possible to support the above
features on Linux and provides applications access to the ME and it's
features.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Signed-off-by: Marcin Obara <marcin.obara@intel.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index b343814..f473f95 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2247,6 +2247,15 @@ L: e1000-devel@lists.sourceforge.net
W: http://e1000.sourceforge.net/
S: Supported
+INTEL MANAGEABILITY ENGINE INTERFACE (HECI)
+P: Anas Nashif
+M: anas.nashif@intel.com
+P: Marcin Obara
+M: marcin.obara@intel.com
+W: http://www.openamt.org/
+L: openamt-devel@lists.sourceforge.net
+S: Supported
+
INTEL PRO/WIRELESS 2100 NETWORK CONNECTION SUPPORT
P: Zhu Yi
M: yi.zhu@intel.com
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index caff851..a49821d 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -1103,6 +1103,7 @@ config DEVPORT
default y
source "drivers/s390/char/Kconfig"
+source "drivers/char/heci/Kconfig"
endmenu
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 6850f6d..8ad2f2c 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -105,6 +105,7 @@ obj-$(CONFIG_IPMI_HANDLER) += ipmi/
obj-$(CONFIG_HANGCHECK_TIMER) += hangcheck-timer.o
obj-$(CONFIG_TCG_TPM) += tpm/
+obj-$(CONFIG_INTEL_MEI) += heci/
obj-$(CONFIG_PS3_FLASH) += ps3flash.o
diff --git a/drivers/char/heci/Kconfig b/drivers/char/heci/Kconfig
new file mode 100644
index 0000000..99b7d05
--- /dev/null
+++ b/drivers/char/heci/Kconfig
@@ -0,0 +1,12 @@
+#
+# HECI device configuration
+#
+
+config INTEL_MEI
+ tristate "Intel Management Engine Interface (MEI) Support (EXPERIMENTAL)"
+ depends on EXPERIMENTAL
+ ---help---
+ The Intel Management Engine Interface (Intel MEI) driver allows
+ applications to access the Active Management Technology
+ firmware and other Management Engine sub-systems.
+
diff --git a/drivers/char/heci/Makefile b/drivers/char/heci/Makefile
new file mode 100644
index 0000000..a2d7182
--- /dev/null
+++ b/drivers/char/heci/Makefile
@@ -0,0 +1,7 @@
+#
+## Makefile for the Intel MEI driver (heci)
+#
+
+obj-$(CONFIG_INTEL_MEI) += heci.o
+
+heci-objs := heci_init.o heci_interface.o heci_main.o interrupt.o io_heci.o
diff --git a/drivers/char/heci/heci.h b/drivers/char/heci/heci.h
new file mode 100644
index 0000000..9b279f3
--- /dev/null
+++ b/drivers/char/heci/heci.h
@@ -0,0 +1,176 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_H_
+#define _HECI_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+extern const struct guid heci_pthi_guid;
+extern const struct guid heci_wd_guid;
+extern const __u8 heci_start_wd_params[];
+extern const __u8 heci_stop_wd_params[];
+extern const __u8 heci_wd_state_independence_msg[3][4];
+
+/*
+ * heci device ID
+ */
+#define HECI_DEV_ID_82946GZ 0x2974 /* 82946GZ/GL */
+#define HECI_DEV_ID_82G35 0x2984 /* 82G35 Express */
+#define HECI_DEV_ID_82Q965 0x2994 /* 82Q963/Q965 */
+#define HECI_DEV_ID_82G965 0x29A4 /* 82P965/G965 */
+
+#define HECI_DEV_ID_82GM965 0x2A04 /* Mobile PM965/GM965 */
+#define HECI_DEV_ID_82GME965 0x2A14 /* Mobile GME965/GLE960 */
+
+#define HECI_DEV_ID_ICH9_82Q35 0x29B4 /* 82Q35 Express */
+#define HECI_DEV_ID_ICH9_82G33 0x29C4 /* 82G33/G31/P35/P31 Express */
+#define HECI_DEV_ID_ICH9_82Q33 0x29D4 /* 82Q33 Express */
+#define HECI_DEV_ID_ICH9_82X38 0x29E4 /* 82X38/X48 Express */
+#define HECI_DEV_ID_ICH9_3200 0x29F4 /* 3200/3210 Server */
+
+#define HECI_DEV_ID_ICH9_6 0x28B4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_7 0x28C4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_8 0x28D4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_9 0x28E4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_10 0x28F4 /* Bearlake */
+
+#define HECI_DEV_ID_ICH9M_1 0x2A44 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_2 0x2A54 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_3 0x2A64 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_4 0x2A74 /* Cantiga */
+
+#define HECI_DEV_ID_ICH10_1 0x2E04 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_2 0x2E14 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_3 0x2E24 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_4 0x2E34 /* Eaglelake */
+
+/*
+ * heci init function prototypes
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev);
+void heci_reset(struct iamt_heci_device *dev, int interrupts);
+int heci_hw_init(struct iamt_heci_device *dev);
+int heci_task_initialize_clients(void *data);
+int heci_initialize_clients(struct iamt_heci_device *dev);
+struct heci_file_private *heci_alloc_file_private(struct file *file);
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev);
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext);
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id);
+
+/*
+ * interrupt function prototype
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id);
+
+void heci_wd_timer(unsigned long data);
+
+/*
+ * input output function prototype
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file);
+
+int heci_ioctl_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_bypass_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_start_read(struct iamt_heci_device *dev, int if_num,
+ struct heci_file_private *file_ext);
+
+int pthi_write(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb);
+
+int pthi_read(struct iamt_heci_device *dev, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset);
+
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct file *file);
+
+void run_next_iamthif_cmd(struct iamt_heci_device *dev);
+
+void heci_free_cb_private(struct heci_cb_private *priv_cb);
+
+/**
+ * heci_fe_same_id - tell if file private data have same id
+ *
+ * @fe1: private data of 1. file object
+ * @fe2: private data of 2. file object
+ *
+ * returns !=0 - if ids are the same, 0 - if differ.
+ */
+static inline int heci_fe_same_id(const struct heci_file_private *fe1,
+ const struct heci_file_private *fe2)
+{
+ return ((fe1->host_client_id == fe2->host_client_id)
+ && (fe1->me_client_id == fe2->me_client_id));
+}
+
+#endif /* _HECI_H_ */
diff --git a/drivers/char/heci/heci_data_structures.h b/drivers/char/heci/heci_data_structures.h
new file mode 100644
index 0000000..beacf7c
--- /dev/null
+++ b/drivers/char/heci/heci_data_structures.h
@@ -0,0 +1,536 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_DATA_STRUCTURES_H_
+#define _HECI_DATA_STRUCTURES_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+
+/*
+ * error code definition
+ */
+#define ESLOTS_OVERFLOW 1
+#define ECORRUPTED_MESSAGE_HEADER 1000
+#define ECOMPLETE_MESSAGE 1001
+
+#define HECI_FC_MESSAGE_RESERVED_LENGTH 5
+
+/*
+ * Number of queue lists used by this driver
+ */
+#define HECI_IO_LISTS_NUMBER 7
+
+/*
+ * Maximum transmission unit (MTU) of heci messages
+ */
+#define IAMTHIF_MTU 4160
+
+
+/*
+ * HECI HW Section
+ */
+
+/* HECI registers */
+/* H_CB_WW - Host Circular Buffer (CB) Write Window register */
+#define H_CB_WW 0
+/* H_CSR - Host Control Status register */
+#define H_CSR 4
+/* ME_CB_RW - ME Circular Buffer Read Window register (read only) */
+#define ME_CB_RW 8
+/* ME_CSR_HA - ME Control Status Host Access register (read only) */
+#define ME_CSR_HA 0xC
+
+
+/* register bits of H_CSR (Host Control Status register) */
+/* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */
+#define H_CBD 0xFF000000
+/* Host Circular Buffer Write Pointer */
+#define H_CBWP 0x00FF0000
+/* Host Circular Buffer Read Pointer */
+#define H_CBRP 0x0000FF00
+/* Host Reset */
+#define H_RST 0x00000010
+/* Host Ready */
+#define H_RDY 0x00000008
+/* Host Interrupt Generate */
+#define H_IG 0x00000004
+/* Host Interrupt Status */
+#define H_IS 0x00000002
+/* Host Interrupt Enable */
+#define H_IE 0x00000001
+
+
+/* register bits of ME_CSR_HA (ME Control Status Host Access register) */
+/* ME CB (Circular Buffer) Depth HRA (Host Read Access)
+ * - host read only access to ME_CBD */
+#define ME_CBD_HRA 0xFF000000
+/* ME CB Write Pointer HRA - host read only access to ME_CBWP */
+#define ME_CBWP_HRA 0x00FF0000
+/* ME CB Read Pointer HRA - host read only access to ME_CBRP */
+#define ME_CBRP_HRA 0x0000FF00
+/* ME Reset HRA - host read only access to ME_RST */
+#define ME_RST_HRA 0x00000010
+/* ME Ready HRA - host read only access to ME_RDY */
+#define ME_RDY_HRA 0x00000008
+/* ME Interrupt Generate HRA - host read only access to ME_IG */
+#define ME_IG_HRA 0x00000004
+/* ME Interrupt Status HRA - host read only access to ME_IS */
+#define ME_IS_HRA 0x00000002
+/* ME Interrupt Enable HRA - host read only access to ME_IE */
+#define ME_IE_HRA 0x00000001
+
+#define HECI_MINORS_BASE 1
+#define HECI_MINORS_COUNT 1
+
+#define HECI_MINOR_NUMBER 1
+#define HECI_MAX_OPEN_HANDLE_COUNT 253
+
+/*
+ * debug kernel print macro define
+ */
+extern int heci_debug;
+extern struct device *heci_dev;
+
+#define DBG(format, arg...) do { \
+ if (heci_debug) { \
+ if (heci_dev) \
+ dev_info(heci_dev, "%s: " format, __func__, ## arg); \
+ else \
+ printk(KERN_INFO "heci: %s: " format, \
+ __func__, ## arg); \
+ } \
+} while (0)
+
+
+/*
+ * time to wait HECI become ready after init
+ */
+#define HECI_INTEROP_TIMEOUT (HZ * 7)
+
+/*
+ * watch dog definition
+ */
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+#define HECI_WD_STATE_INDEPENDENCE_MSG_SENT (1 << 0)
+
+#define HECI_WD_HOST_CLIENT_ID 1
+#define HECI_IAMTHIF_HOST_CLIENT_ID 2
+
+struct guid {
+ __u32 data1;
+ __u16 data2;
+ __u16 data3;
+ __u8 data4[8];
+};
+
+/* File state */
+enum file_state {
+ HECI_FILE_INITIALIZING = 0,
+ HECI_FILE_CONNECTING,
+ HECI_FILE_CONNECTED,
+ HECI_FILE_DISCONNECTING,
+ HECI_FILE_DISCONNECTED
+};
+
+/* HECI device states */
+enum heci_states {
+ HECI_INITIALIZING = 0,
+ HECI_ENABLED,
+ HECI_RESETING,
+ HECI_DISABLED,
+ HECI_RECOVERING_FROM_RESET,
+ HECI_POWER_DOWN,
+ HECI_POWER_UP
+};
+
+enum iamthif_states {
+ HECI_IAMTHIF_IDLE,
+ HECI_IAMTHIF_WRITING,
+ HECI_IAMTHIF_FLOW_CONTROL,
+ HECI_IAMTHIF_READING,
+ HECI_IAMTHIF_READ_COMPLETE
+};
+
+enum heci_file_transaction_states {
+ HECI_IDLE,
+ HECI_WRITING,
+ HECI_WRITE_COMPLETE,
+ HECI_FLOW_CONTROL,
+ HECI_READING,
+ HECI_READ_COMPLETE
+};
+
+/* HECI CB */
+enum heci_cb_major_types {
+ HECI_READ = 0,
+ HECI_WRITE,
+ HECI_IOCTL,
+ HECI_OPEN,
+ HECI_CLOSE
+};
+
+/* HECI user data struct */
+struct heci_message_data {
+ __u32 size;
+ char *data;
+} __attribute__((packed));
+
+#define HECI_CONNECT_TIMEOUT 3 /* at least 2 seconds */
+
+#define IAMTHIF_STALL_TIMER 12 /* seconds */
+#define IAMTHIF_READ_TIMER 15 /* seconds */
+
+struct heci_cb_private {
+ struct list_head cb_list;
+ enum heci_cb_major_types major_file_operations;
+ void *file_private;
+ struct heci_message_data request_buffer;
+ struct heci_message_data response_buffer;
+ unsigned long information;
+ unsigned long read_time;
+ struct file *file_object;
+};
+
+/* Private file struct */
+struct heci_file_private {
+ struct list_head link;
+ struct file *file;
+ enum file_state state;
+ wait_queue_head_t tx_wait;
+ wait_queue_head_t rx_wait;
+ wait_queue_head_t wait;
+ spinlock_t file_lock; /* file lock */
+ spinlock_t read_io_lock; /* read lock */
+ spinlock_t write_io_lock; /* write lock */
+ int read_pending;
+ int status;
+ /* ID of client connected */
+ __u8 host_client_id;
+ __u8 me_client_id;
+ __u8 flow_ctrl_creds;
+ __u8 timer_count;
+ enum heci_file_transaction_states reading_state;
+ enum heci_file_transaction_states writing_state;
+ int sm_state;
+ struct heci_cb_private *read_cb;
+};
+
+struct io_heci_list {
+ struct heci_cb_private heci_cb;
+ int status;
+ struct iamt_heci_device *device_extension;
+};
+
+struct heci_driver_version {
+ __u8 major;
+ __u8 minor;
+ __u8 hotfix;
+ __u16 build;
+} __attribute__((packed));
+
+
+struct heci_client {
+ __u32 max_msg_length;
+ __u8 protocol_version;
+} __attribute__((packed));
+
+/*
+ * HECI BUS Interface Section
+ */
+struct heci_msg_hdr {
+ __u32 me_addr:8;
+ __u32 host_addr:8;
+ __u32 length:9;
+ __u32 reserved:6;
+ __u32 msg_complete:1;
+} __attribute__((packed));
+
+
+struct hbm_cmd {
+ __u8 cmd:7;
+ __u8 is_response:1;
+} __attribute__((packed));
+
+
+struct heci_bus_message {
+ struct hbm_cmd cmd;
+ __u8 command_specific_data[];
+} __attribute__((packed));
+
+struct hbm_version {
+ __u8 minor_version;
+ __u8 major_version;
+} __attribute__((packed));
+
+struct hbm_host_version_request {
+ struct hbm_cmd cmd;
+ __u8 reserved;
+ struct hbm_version host_version;
+} __attribute__((packed));
+
+struct hbm_host_version_response {
+ struct hbm_cmd cmd;
+ int host_version_supported;
+ struct hbm_version me_max_version;
+} __attribute__((packed));
+
+struct hbm_host_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_stop_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_me_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_enum_request {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_host_enum_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+ __u8 valid_addresses[32];
+} __attribute__((packed));
+
+struct heci_client_properties {
+ struct guid protocol_name;
+ __u8 protocol_version;
+ __u8 max_number_of_connections;
+ __u8 fixed_address;
+ __u8 single_recv_buf;
+ __u32 max_msg_length;
+} __attribute__((packed));
+
+struct hbm_props_request {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+
+struct hbm_props_response {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 status;
+ __u8 reserved[1];
+ struct heci_client_properties client_properties;
+} __attribute__((packed));
+
+struct hbm_client_connect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved;
+} __attribute__((packed));
+
+struct hbm_client_connect_response {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 status;
+} __attribute__((packed));
+
+struct hbm_client_disconnect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[1];
+} __attribute__((packed));
+
+struct hbm_flow_control {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[HECI_FC_MESSAGE_RESERVED_LENGTH];
+} __attribute__((packed));
+
+struct heci_me_client {
+ struct heci_client_properties props;
+ __u8 client_id;
+ __u8 flow_ctrl_creds;
+} __attribute__((packed));
+
+/* private device struct */
+struct iamt_heci_device {
+ struct pci_dev *pdev; /* pointer to pci device struct */
+ /*
+ * lists of queues
+ */
+ /* array of pointers to aio lists */
+ struct io_heci_list *io_list_array[HECI_IO_LISTS_NUMBER];
+ struct io_heci_list read_list; /* driver read queue */
+ struct io_heci_list write_list; /* driver write queue */
+ struct io_heci_list write_waiting_list; /* write waiting queue */
+ struct io_heci_list ctrl_wr_list; /* managed write IOCTL list */
+ struct io_heci_list ctrl_rd_list; /* managed read IOCTL list */
+ struct io_heci_list pthi_cmd_list; /* PTHI list for cmd waiting */
+
+ /* driver managed PTHI list for reading completed pthi cmd data */
+ struct io_heci_list pthi_read_complete_list;
+ /*
+ * list of files
+ */
+ struct list_head file_list;
+ /*
+ * memory of device
+ */
+ unsigned int mem_base;
+ unsigned int mem_length;
+ char *mem_addr;
+ /*
+ * lock for the device
+ */
+ spinlock_t device_lock; /* device lock*/
+ struct work_struct work;
+ int recvd_msg;
+
+ struct task_struct *reinit_tsk;
+
+ struct timer_list wd_timer;
+ /*
+ * hw states of host and fw(ME)
+ */
+ __u32 host_hw_state;
+ __u32 me_hw_state;
+ /*
+ * waiting queue for receive message from FW
+ */
+ wait_queue_head_t wait_recvd_msg;
+ wait_queue_head_t wait_stop_wd;
+ /*
+ * heci device states
+ */
+ enum heci_states heci_state;
+ int stop;
+
+ __u32 extra_write_index;
+ __u32 rd_msg_buf[128]; /* used for control messages */
+ __u32 wr_msg_buf[128]; /* used for control messages */
+ __u32 ext_msg_buf[8]; /* for control responses */
+ __u32 rd_msg_hdr;
+
+ struct hbm_version version;
+
+ int host_buffer_is_empty;
+ struct heci_file_private wd_file_ext;
+ struct heci_me_client *me_clients; /* Note: memory has to be allocated*/
+ __u8 heci_me_clients[32]; /* list of existing clients */
+ __u8 num_heci_me_clients;
+ __u8 heci_host_clients[32]; /* list of existing clients */
+ __u8 current_host_client_id;
+
+ int wd_pending;
+ int wd_stoped;
+ __u16 wd_timeout; /* seconds ((wd_data[1] << 8) + wd_data[0]) */
+ unsigned char wd_data[HECI_START_WD_DATA_SIZE];
+
+
+ __u16 wd_due_counter;
+ int asf_mode;
+ int wd_bypass; /* if 1, don't refresh watchdog ME client */
+
+ struct file *iamthif_file_object;
+ struct heci_file_private iamthif_file_ext;
+ int iamthif_ioctl;
+ int iamthif_canceled;
+ __u32 iamthif_timer;
+ __u32 iamthif_stall_timer;
+ unsigned char iamthif_msg_buf[IAMTHIF_MTU];
+ __u32 iamthif_msg_buf_size;
+ __u32 iamthif_msg_buf_index;
+ int iamthif_flow_control_pending;
+ enum iamthif_states iamthif_state;
+
+ struct heci_cb_private *iamthif_current_cb;
+ __u8 write_hang;
+ int need_reset;
+ long open_handle_count;
+
+};
+
+/**
+ * read_heci_register - Read a byte from the heci device
+ *
+ * @dev: the device structure
+ * @offset: offset from which to read the data
+ *
+ * returns the byte read.
+ */
+static inline __u32 read_heci_register(struct iamt_heci_device *dev,
+ unsigned long offset)
+{
+ return readl(dev->mem_addr + offset);
+}
+
+/**
+ * write_heci_register - Write 4 bytes to the heci device
+ *
+ * @dev: the device structure
+ * @offset: offset from which to write the data
+ * @value: the byte to write
+ */
+static inline void write_heci_register(struct iamt_heci_device *dev,
+ unsigned long offset, __u32 value)
+{
+ writel(value, dev->mem_addr + offset);
+}
+
+#endif /* _HECI_DATA_STRUCTURES_H_ */
diff --git a/drivers/char/heci/heci_init.c b/drivers/char/heci/heci_init.c
new file mode 100644
index 0000000..bdd9180
--- /dev/null
+++ b/drivers/char/heci/heci_init.c
@@ -0,0 +1,1077 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/moduleparam.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+
+#include "heci_data_structures.h"
+#include "heci_interface.h"
+#include "heci.h"
+
+
+const __u8 heci_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 };
+const __u8 heci_stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10 };
+
+const __u8 heci_wd_state_independence_msg[3][4] = {
+ {0x05, 0x02, 0x51, 0x10},
+ {0x05, 0x02, 0x52, 0x10},
+ {0x07, 0x02, 0x01, 0x10}
+};
+
+const struct guid heci_asf_guid = {
+ 0x75B30CD6, 0xA29E, 0x4AF7,
+ {0xA7, 0x12, 0xE6, 0x17, 0x43, 0x93, 0xC8, 0xA6}
+};
+const struct guid heci_wd_guid = {
+ 0x05B79A6F, 0x4628, 0x4D7F,
+ {0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB}
+};
+const struct guid heci_pthi_guid = {
+ 0x12f80028, 0xb4b7, 0x4b2d,
+ {0xac, 0xa8, 0x46, 0xe0, 0xff, 0x65, 0x81, 0x4c}
+};
+
+
+/*
+ * heci init function prototypes
+ */
+static void heci_check_asf_mode(struct iamt_heci_device *dev);
+static int host_start_message(struct iamt_heci_device *dev);
+static int host_enum_clients_message(struct iamt_heci_device *dev);
+static int allocate_me_clients_storage(struct iamt_heci_device *dev);
+static void host_init_wd(struct iamt_heci_device *dev);
+static void host_init_iamthif(struct iamt_heci_device *dev);
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout);
+
+
+/**
+ * heci_initialize_list - Sets up a queue list.
+ *
+ * @list: An instance of our list structure
+ * @dev: Device object for our driver
+ */
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev)
+{
+ /* initialize our queue list */
+ INIT_LIST_HEAD(&list->heci_cb.cb_list);
+ list->status = 0;
+ list->device_extension = dev;
+}
+
+/**
+ * heci_flush_queues - flush our queues list belong to file_ext.
+ *
+ * @dev: Device object for our driver
+ * @file_ext: private data of the file object
+ */
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int i;
+
+ if (!dev || !file_ext)
+ return;
+
+ /* flush our queue list belong to file_ext */
+ for (i = 0; i < HECI_IO_LISTS_NUMBER; i++) {
+ DBG("remove list entry belong to file_ext\n");
+ heci_flush_list(dev->io_list_array[i], file_ext);
+ }
+}
+
+
+/**
+ * heci_flush_list - remove list entry belong to file_ext.
+ *
+ * @list: An instance of our list structure
+ * @file_ext: private data of the file object
+ */
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext)
+{
+ struct heci_file_private *file_ext_tmp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if (!list || !file_ext)
+ return;
+
+ if (list->status != 0)
+ return;
+
+ if (list_empty(&list->heci_cb.cb_list))
+ return;
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &list->heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos) {
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext_tmp) {
+ if (heci_fe_same_id(file_ext, file_ext_tmp))
+ list_del(&priv_cb_pos->cb_list);
+ }
+ }
+ }
+}
+
+/**
+ * heci_reset_iamthif_params - initializes heci device iamthif
+ *
+ * @dev: The heci device structure
+ */
+static void heci_reset_iamthif_params(struct iamt_heci_device *dev)
+{
+ /* reset iamthif parameters. */
+ dev->iamthif_current_cb = NULL;
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_file_ext.file = NULL;
+ dev->iamthif_ioctl = 0;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+}
+
+/**
+ * init_heci_device - allocates and initializes the heci device structure
+ *
+ * @pdev: The pci device structure
+ *
+ * returns The heci_device_device pointer on success, NULL on failure.
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev)
+{
+ int i;
+ struct iamt_heci_device *dev;
+
+ dev = kzalloc(sizeof(struct iamt_heci_device), GFP_KERNEL);
+ if (!dev)
+ return NULL;
+
+ /* setup our list array */
+ dev->io_list_array[0] = &dev->read_list;
+ dev->io_list_array[1] = &dev->write_list;
+ dev->io_list_array[2] = &dev->write_waiting_list;
+ dev->io_list_array[3] = &dev->ctrl_wr_list;
+ dev->io_list_array[4] = &dev->ctrl_rd_list;
+ dev->io_list_array[5] = &dev->pthi_cmd_list;
+ dev->io_list_array[6] = &dev->pthi_read_complete_list;
+ INIT_LIST_HEAD(&dev->file_list);
+ INIT_LIST_HEAD(&dev->wd_file_ext.link);
+ INIT_LIST_HEAD(&dev->iamthif_file_ext.link);
+ spin_lock_init(&dev->device_lock);
+ init_waitqueue_head(&dev->wait_recvd_msg);
+ init_waitqueue_head(&dev->wait_stop_wd);
+ dev->heci_state = HECI_INITIALIZING;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+
+ /* init work for schedule work */
+ INIT_WORK(&dev->work, NULL);
+ for (i = 0; i < HECI_IO_LISTS_NUMBER; i++)
+ heci_initialize_list(dev->io_list_array[i], dev);
+ dev->pdev = pdev;
+ return dev;
+}
+
+
+
+
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout)
+{
+ return wait_event_interruptible_timeout(dev->wait_recvd_msg,
+ (dev->recvd_msg), timeout);
+}
+
+/**
+ * heci_hw_init - init host and fw to start work.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_hw_init(struct iamt_heci_device *dev)
+{
+ int err = 0;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ DBG("host_hw_state = 0x%08x, mestate = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ /* acknowledge interrupt and stop interupts */
+ heci_set_csr_register(dev);
+ }
+ dev->recvd_msg = 0;
+ DBG("reset in start the heci device.\n");
+
+ heci_reset(dev, 1);
+
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ /* wait for ME to turn on ME_RDY */
+ if (!dev->recvd_msg)
+ err = heci_wait_event_int_timeout(dev, HECI_INTEROP_TIMEOUT);
+
+ if (!err && !dev->recvd_msg) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("wait_event_interruptible_timeout failed"
+ "on wait for ME to turn on ME_RDY.\n");
+ return -ENODEV;
+ } else {
+ if (!(((dev->host_hw_state & H_RDY) == H_RDY)
+ && ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state,
+ dev->me_hw_state);
+
+ if (!(dev->host_hw_state & H_RDY) != H_RDY)
+ DBG("host turn off H_RDY.\n");
+
+ if (!(dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ DBG("ME turn off ME_RDY.\n");
+
+ printk(KERN_ERR
+ "heci: link layer initialization failed.\n");
+ return -ENODEV;
+ }
+ }
+ dev->recvd_msg = 0;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+ DBG("ME turn on ME_RDY and host turn on H_RDY.\n");
+ printk(KERN_INFO "heci: link layer has been established.\n");
+ return 0;
+}
+
+/**
+ * heci_hw_reset - reset fw via heci csr register.
+ *
+ * @dev: Device object for our driver
+ * @interrupts: if interrupt should be enable after reset.
+ */
+static void heci_hw_reset(struct iamt_heci_device *dev, int interrupts)
+{
+ dev->host_hw_state |= (H_RST | H_IG);
+
+ if (interrupts)
+ heci_csr_enable_interrupts(dev);
+ else
+ heci_csr_disable_interrupts(dev);
+
+ BUG_ON((dev->host_hw_state & H_RST) != H_RST);
+ BUG_ON((dev->host_hw_state & H_RDY) != 0);
+}
+
+/**
+ * heci_reset - reset host and fw.
+ *
+ * @dev: Device object for our driver
+ * @interrupts: if interrupt should be enable after reset.
+ */
+void heci_reset(struct iamt_heci_device *dev, int interrupts)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int unexpected = 0;
+
+ if (dev->heci_state == HECI_RECOVERING_FROM_RESET) {
+ dev->need_reset = 1;
+ return;
+ }
+
+ if (dev->heci_state != HECI_INITIALIZING &&
+ dev->heci_state != HECI_DISABLED &&
+ dev->heci_state != HECI_POWER_DOWN &&
+ dev->heci_state != HECI_POWER_UP)
+ unexpected = 1;
+
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+
+ DBG("before reset host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ heci_hw_reset(dev, interrupts);
+
+ dev->host_hw_state &= ~H_RST;
+ dev->host_hw_state |= H_IG;
+
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+
+ DBG("currently saved host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ dev->need_reset = 0;
+
+ if (dev->heci_state != HECI_INITIALIZING) {
+ if ((dev->heci_state != HECI_DISABLED) &&
+ (dev->heci_state != HECI_POWER_DOWN))
+ dev->heci_state = HECI_RESETING;
+
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->flow_ctrl_creds = 0;
+ file_pos->read_cb = NULL;
+ file_pos->timer_count = 0;
+ }
+ /* remove entry if already in list */
+ DBG("list del iamthif and wd file list.\n");
+ heci_remove_client_from_file_list(dev,
+ dev->wd_file_ext.host_client_id);
+
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+
+ heci_reset_iamthif_params(dev);
+ dev->wd_due_counter = 0;
+ dev->extra_write_index = 0;
+ }
+
+ dev->num_heci_me_clients = 0;
+ dev->rd_msg_hdr = 0;
+ dev->stop = 0;
+ dev->wd_pending = 0;
+
+ /* update the state of the registers after reset */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ DBG("after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if (unexpected)
+ printk(KERN_WARNING "heci: unexpected reset.\n");
+
+ /* Wake up all readings so they can be interrupted */
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (&file_pos->rx_wait &&
+ waitqueue_active(&file_pos->rx_wait)) {
+ printk(KERN_INFO "heci: Waking up client!\n");
+ wake_up_interruptible(&file_pos->rx_wait);
+ }
+ }
+ /* remove all waiting requests */
+ if (dev->write_list.status == 0 &&
+ !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos) {
+ list_del(&priv_cb_pos->cb_list);
+ heci_free_cb_private(priv_cb_pos);
+ }
+ }
+ }
+}
+
+/**
+ * heci_initialize_clients - heci communication initialization.
+ *
+ * @dev: Device object for our driver
+ */
+int heci_initialize_clients(struct iamt_heci_device *dev)
+{
+ int status;
+
+ msleep(100); /* FW needs time to be ready to talk with us */
+ DBG("link is established start sending messages.\n");
+ /* link is established start sending messages. */
+ status = host_start_message(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("start sending messages failed.\n");
+ return status;
+ }
+
+ /* enumerate clients */
+ status = host_enum_clients_message(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("enum clients failed.\n");
+ return status;
+ }
+ /* allocate storage for ME clients representation */
+ status = allocate_me_clients_storage(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->num_heci_me_clients = 0;
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("allocate clients failed.\n");
+ return status;
+ }
+
+ heci_check_asf_mode(dev);
+ /* heci watchdog initialization */
+ host_init_wd(dev);
+ /* heci iamthif client initialization */
+ host_init_iamthif(dev);
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->need_reset) {
+ dev->need_reset = 0;
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+
+ memset(dev->heci_host_clients, 0, sizeof(dev->heci_host_clients));
+ dev->open_handle_count = 0;
+ dev->heci_host_clients[0] |= 7;
+ dev->current_host_client_id = 3;
+ dev->heci_state = HECI_ENABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("initialization heci clients successful.\n");
+ return 0;
+}
+
+/**
+ * heci_task_initialize_clients - heci reinitialization task
+ *
+ * @data: Device object for our driver
+ */
+int heci_task_initialize_clients(void *data)
+{
+ int ret;
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->reinit_tsk != NULL) {
+ spin_unlock_bh(&dev->device_lock);
+ DBG("reinit task already started.\n");
+ return 0;
+ }
+ dev->reinit_tsk = current;
+ current->flags |= PF_NOFREEZE;
+ spin_unlock_bh(&dev->device_lock);
+
+ ret = heci_initialize_clients(dev);
+
+ spin_lock_bh(&dev->device_lock);
+ dev->reinit_tsk = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ return ret;
+}
+
+/**
+ * host_start_message - heci host send start message.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_start_message(struct iamt_heci_device *dev)
+{
+ long timeout = 60; /* 60 second */
+
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_version_request *host_start_req;
+ struct hbm_host_stop_request *host_stop_req;
+ int err = 0;
+
+ /* host start message */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_version_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_start_req =
+ (struct hbm_host_version_request *) &dev->wr_msg_buf[1];
+ memset(host_start_req, 0, sizeof(struct hbm_host_version_request));
+ host_start_req->cmd.cmd = HOST_START_REQ_CMD;
+ host_start_req->host_version.major_version = HBM_MAJOR_VERSION;
+ host_start_req->host_version.minor_version = HBM_MINOR_VERSION;
+ dev->recvd_msg = 0;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_start_req),
+ heci_hdr->length)) {
+ DBG("send version to fw fail.\n");
+ return -ENODEV;
+ }
+ DBG("call wait_event_interruptible_timeout for response message.\n");
+ /* wait for response */
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait_timeout failed on host start response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ DBG("wait_timeout successful on host start response message.\n");
+ if ((dev->version.major_version != HBM_MAJOR_VERSION) ||
+ (dev->version.minor_version != HBM_MINOR_VERSION)) {
+ /* send stop message */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_stop_req =
+ (struct hbm_host_stop_request *) &dev->wr_msg_buf[1];
+
+ memset(host_stop_req, 0, sizeof(struct hbm_host_stop_request));
+ host_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ host_stop_req->reason = DRIVER_STOP_REQUEST;
+ heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_stop_req),
+ heci_hdr->length);
+ DBG("version mismatch.\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/**
+ * host_enum_clients_message - host send enumeration client request message.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_enum_clients_message(struct iamt_heci_device *dev)
+{
+ long timeout = 5; /*5 second */
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_enum_request *host_enum_req;
+ int err = 0;
+ int i, j;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ /* enumerate clients */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_enum_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1];
+ memset(host_enum_req, 0, sizeof(struct hbm_host_enum_request));
+ host_enum_req->cmd.cmd = HOST_ENUM_REQ_CMD;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_enum_req),
+ heci_hdr->length)) {
+ DBG("send enumeration request failed.\n");
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait_event_interruptible_timeout failed "
+ "on enumeration clients response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+
+ spin_lock_bh(&dev->device_lock);
+ /* count how many ME clients we have */
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0)
+ dev->num_heci_me_clients++;
+
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ return 0;
+}
+
+/**
+ * host_client_properties - reads properties for client
+ *
+ * @dev: Device object for our driver
+ * @idx: client index in me client array
+ * @client_id: id of the client
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_client_properties(struct iamt_heci_device *dev,
+ struct heci_me_client *client)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_props_request *host_cli_req;
+ int err;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_props_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_cli_req = (struct hbm_props_request *) &dev->wr_msg_buf[1];
+ memset(host_cli_req, 0, sizeof(struct hbm_props_request));
+ host_cli_req->cmd.cmd = HOST_CLIENT_PROPERTEIS_REQ_CMD;
+ host_cli_req->address = client->client_id;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_cli_req),
+ heci_hdr->length)) {
+ DBG("send props request failed.\n");
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev, 10 * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait failed on props resp msg.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ return 0;
+}
+
+/**
+ * allocate_me_clients_storage - allocate storage for me clients
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int allocate_me_clients_storage(struct iamt_heci_device *dev)
+{
+ struct heci_me_client *clients;
+ struct heci_me_client *client;
+ __u8 num, i, j;
+ int err;
+
+ if (dev->num_heci_me_clients <= 0)
+ return 0;
+
+ spin_lock_bh(&dev->device_lock);
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ /* allocate storage for ME clients representation */
+ clients = kcalloc(dev->num_heci_me_clients,
+ sizeof(struct heci_me_client), GFP_KERNEL);
+ if (!clients) {
+ DBG("memory allocation for ME clients failed.\n");
+ return -ENOMEM;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ dev->me_clients = clients;
+ spin_unlock_bh(&dev->device_lock);
+
+ num = 0;
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0) {
+ client = &dev->me_clients[num];
+ client->client_id = (i * 8) + j;
+ client->flow_ctrl_creds = 0;
+ err = host_client_properties(dev, client);
+ if (err != 0) {
+ spin_lock_bh(&dev->device_lock);
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+ spin_unlock_bh(&dev->device_lock);
+ return err;
+ }
+ num++;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * heci_init_file_private - initializes private file structure.
+ *
+ * @priv: private file structure to be initialized
+ * @file: the file structure
+ */
+static void heci_init_file_private(struct heci_file_private *priv,
+ struct file *file)
+{
+ memset(priv, 0, sizeof(struct heci_file_private));
+ spin_lock_init(&priv->file_lock);
+ spin_lock_init(&priv->read_io_lock);
+ spin_lock_init(&priv->write_io_lock);
+ init_waitqueue_head(&priv->wait);
+ init_waitqueue_head(&priv->rx_wait);
+ DBG("priv->rx_wait =%p\n", &priv->rx_wait);
+ init_waitqueue_head(&priv->tx_wait);
+ INIT_LIST_HEAD(&priv->link);
+ priv->reading_state = HECI_IDLE;
+ priv->writing_state = HECI_IDLE;
+}
+
+/**
+ * heci_find_me_client - search for ME client guid
+ * sets client_id in heci_file_private if found
+ * @dev: Device object for our driver
+ * @priv: private file structure to set client_id in
+ * @cguid: searched guid of ME client
+ * @client_id: id of host client to be set in file private structure
+ *
+ * returns ME client index
+ */
+static __u8 heci_find_me_client(struct iamt_heci_device *dev,
+ struct heci_file_private *priv,
+ const struct guid *cguid, __u8 client_id)
+{
+ __u8 i;
+
+ if ((dev == NULL) || (priv == NULL) || (cguid == NULL))
+ return 0;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(cguid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ priv->me_client_id = dev->me_clients[i].client_id;
+ priv->state = HECI_FILE_CONNECTING;
+ priv->host_client_id = client_id;
+
+ list_add_tail(&priv->link, &dev->file_list);
+ return i;
+ }
+ }
+ return 0;
+}
+
+/**
+ * heci_check_asf_mode - check for ASF client
+ *
+ * @dev: Device object for our driver
+ */
+static void heci_check_asf_mode(struct iamt_heci_device *dev)
+{
+ __u8 i;
+
+ spin_lock_bh(&dev->device_lock);
+ dev->asf_mode = 0;
+ /* find ME ASF client - otherwise assume AMT mode */
+ DBG("find ME ASF client - otherwise assume AMT mode.\n");
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_asf_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ dev->asf_mode = 1;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("found ME ASF client.\n");
+ return;
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+ DBG("assume AMT mode.\n");
+}
+
+/**
+ * heci_connect_me_client - connect ME client
+ * @dev: Device object for our driver
+ * @priv: private file structure
+ * @timeout: connect timeout in seconds
+ *
+ * returns 1 - if connected, 0 - if not
+ */
+static __u8 heci_connect_me_client(struct iamt_heci_device *dev,
+ struct heci_file_private *priv,
+ long timeout)
+{
+ int err = 0;
+
+ if ((dev == NULL) || (priv == NULL))
+ return 0;
+
+ if (!heci_connect(dev, priv)) {
+ DBG("failed to call heci_connect for client_id=%d.\n",
+ priv->host_client_id);
+ spin_lock_bh(&dev->device_lock);
+ heci_remove_client_from_file_list(dev, priv->host_client_id);
+ priv->state = HECI_FILE_DISCONNECTED;
+ spin_unlock_bh(&dev->device_lock);
+ return 0;
+ }
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == priv->state ||
+ HECI_FILE_DISCONNECTED == priv->state),
+ timeout * HZ);
+ if (HECI_FILE_CONNECTED != priv->state) {
+ spin_lock_bh(&dev->device_lock);
+ heci_remove_client_from_file_list(dev, priv->host_client_id);
+ DBG("failed to connect client_id=%d state=%d.\n",
+ priv->host_client_id, priv->state);
+ if (err)
+ DBG("failed connect err=%08x\n", err);
+ priv->state = HECI_FILE_DISCONNECTED;
+ spin_unlock_bh(&dev->device_lock);
+ return 0;
+ }
+ DBG("successfully connected client_id=%d.\n",
+ priv->host_client_id);
+ return 1;
+}
+
+/**
+ * host_init_wd - heci initialization wd.
+ *
+ * @dev: Device object for our driver
+ */
+static void host_init_wd(struct iamt_heci_device *dev)
+{
+ spin_lock_bh(&dev->device_lock);
+
+ heci_init_file_private(&dev->wd_file_ext, NULL);
+
+ /* look for WD client and connect to it */
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTED;
+ dev->wd_timeout = 0;
+
+ if (dev->asf_mode) {
+ memcpy(dev->wd_data, heci_stop_wd_params, HECI_WD_PARAMS_SIZE);
+ } else {
+ /* AMT mode */
+ dev->wd_timeout = AMT_WD_VALUE;
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ memcpy(dev->wd_data, heci_start_wd_params, HECI_WD_PARAMS_SIZE);
+ memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
+ &dev->wd_timeout, sizeof(__u16));
+ }
+
+ /* find ME WD client */
+ heci_find_me_client(dev, &dev->wd_file_ext,
+ &heci_wd_guid, HECI_WD_HOST_CLIENT_ID);
+ spin_unlock_bh(&dev->device_lock);
+
+ DBG("check wd_file_ext\n");
+ if (HECI_FILE_CONNECTING == dev->wd_file_ext.state) {
+ if (heci_connect_me_client(dev, &dev->wd_file_ext, 15) == 1) {
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 1;
+ else
+ dev->wd_due_counter = 0;
+ DBG("successfully connected to WD client.\n");
+ }
+ } else
+ DBG("failed to find WD client.\n");
+
+
+ spin_lock_bh(&dev->device_lock);
+ dev->wd_timer.function = &heci_wd_timer;
+ dev->wd_timer.data = (unsigned long) dev;
+ spin_unlock_bh(&dev->device_lock);
+}
+
+
+/**
+ * host_init_iamthif - heci initialization iamthif client.
+ *
+ * @dev: Device object for our driver
+ *
+ */
+static void host_init_iamthif(struct iamt_heci_device *dev)
+{
+ __u8 i;
+
+ spin_lock_bh(&dev->device_lock);
+
+ heci_init_file_private(&dev->iamthif_file_ext, NULL);
+ dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTED;
+
+ /* find ME PTHI client */
+ i = heci_find_me_client(dev, &dev->iamthif_file_ext,
+ &heci_pthi_guid, HECI_IAMTHIF_HOST_CLIENT_ID);
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTING) {
+ DBG("failed to find iamthif client.\n");
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ BUG_ON(dev->me_clients[i].props.max_msg_length != IAMTHIF_MTU);
+
+ spin_unlock_bh(&dev->device_lock);
+ if (heci_connect_me_client(dev, &dev->iamthif_file_ext, 15) == 1) {
+ DBG("connected to iamthif client.\n");
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ }
+}
+
+/**
+ * heci_alloc_file_private - allocates a private file structure and set it up.
+ * @file: the file structure
+ *
+ * returns The allocated file or NULL on failure
+ */
+struct heci_file_private *heci_alloc_file_private(struct file *file)
+{
+ struct heci_file_private *priv;
+
+ priv = kmalloc(sizeof(struct heci_file_private), GFP_KERNEL);
+ if (!priv)
+ return NULL;
+
+ heci_init_file_private(priv, file);
+
+ return priv;
+}
+
+
+
+/**
+ * heci_disconnect_host_client - send disconnect message to fw from host client.
+ *
+ * @dev: Device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int rets, err;
+ long timeout = 15; /* 15 seconds */
+ struct heci_cb_private *priv_cb;
+
+ if ((!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext->state != HECI_FILE_DISCONNECTING)
+ return 0;
+
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->file_private = file_ext;
+ priv_cb->major_file_operations = HECI_CLOSE;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (heci_disconnect(dev, file_ext)) {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ DBG("failed to call heci_disconnect.\n");
+ goto free;
+ }
+ } else {
+ DBG("add disconnect cb to control write list\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+ if (HECI_FILE_DISCONNECTED == file_ext->state) {
+ rets = 0;
+ DBG("successfully disconnected from fw client.\n");
+ } else {
+ rets = -ENODEV;
+ if (HECI_FILE_DISCONNECTED != file_ext->state)
+ DBG("wrong status client disconnect.\n");
+
+ if (err)
+ DBG("wait failed disconnect err=%08x\n", err);
+
+ DBG("failed to disconnect from fw client.\n");
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_list(&dev->ctrl_rd_list, file_ext);
+ heci_flush_list(&dev->ctrl_wr_list, file_ext);
+ spin_unlock_bh(&dev->device_lock);
+free:
+ heci_free_cb_private(priv_cb);
+ return rets;
+}
+
+/**
+ * heci_remove_client_from_file_list -
+ * remove file private data from device file list
+ *
+ * @dev: Device object for our driver
+ * @host_client_id: host client id to be removed
+ */
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (host_client_id == file_pos->host_client_id) {
+ DBG("remove host client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del_init(&file_pos->link);
+ break;
+ }
+ }
+}
diff --git a/drivers/char/heci/heci_interface.c b/drivers/char/heci/heci_interface.c
new file mode 100644
index 0000000..c5f51a7
--- /dev/null
+++ b/drivers/char/heci/heci_interface.c
@@ -0,0 +1,485 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include "heci.h"
+#include "heci_interface.h"
+
+
+/**
+ * heci_set_csr_register - write H_CSR register to the heci device
+ *
+ * @dev: device object for our driver
+ */
+void heci_set_csr_register(struct iamt_heci_device *dev)
+{
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+}
+
+/**
+ * heci_csr_enable_interrupts - enable heci device interrupts
+ *
+ * @dev: device object for our driver
+ */
+void heci_csr_enable_interrupts(struct iamt_heci_device *dev)
+{
+ dev->host_hw_state |= H_IE;
+ heci_set_csr_register(dev);
+}
+
+/**
+ * heci_csr_disable_interrupts - disable heci device interrupts
+ *
+ * @dev: device object for our driver
+ */
+void heci_csr_disable_interrupts(struct iamt_heci_device *dev)
+{
+ dev->host_hw_state &= ~H_IE;
+ heci_set_csr_register(dev);
+}
+
+
+/**
+ * _host_get_filled_slots - get number of device filled buffer slots
+ *
+ * @device: the device structure
+ *
+ * returns numer of filled slots
+ */
+static unsigned char _host_get_filled_slots(const struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+
+ read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8);
+ write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16);
+
+ return (unsigned char) (write_ptr - read_ptr);
+}
+
+/**
+ * host_buffer_is_empty - check if host buffer is empty.
+ *
+ * @dev: device object for our driver
+ *
+ * returns 1 if empty, 0 - otherwise.
+ */
+int host_buffer_is_empty(struct iamt_heci_device *dev)
+{
+ unsigned char filled_slots;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ filled_slots = _host_get_filled_slots(dev);
+
+ if (filled_slots > 0)
+ return 0;
+
+ return 1;
+}
+
+/**
+ * count_empty_write_slots - count write empty slots.
+ *
+ * @dev: device object for our driver
+ *
+ * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise empty slots count
+ */
+__s32 count_empty_write_slots(const struct iamt_heci_device *dev)
+{
+ unsigned char buffer_depth, filled_slots, empty_slots;
+
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = _host_get_filled_slots(dev);
+ empty_slots = buffer_depth - filled_slots;
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ return (__s32) empty_slots;
+}
+
+/**
+ * heci_write_message - write a message to heci device.
+ *
+ * @dev: device object for our driver
+ * @heci_hdr: header of message
+ * @write_buffer: message buffer will be write
+ * @write_length: message size will be write
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length)
+{
+ __u32 temp_msg = 0;
+ unsigned long bytes_written = 0;
+ unsigned char buffer_depth, filled_slots, empty_slots;
+ unsigned long dw_to_write;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ DBG("host_hw_state = 0x%08x.\n", dev->host_hw_state);
+ DBG("heci_write_message header=%08x.\n", *((__u32 *) header));
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = _host_get_filled_slots(dev);
+ empty_slots = buffer_depth - filled_slots;
+ DBG("filled = %hu, empty = %hu.\n", filled_slots, empty_slots);
+
+ dw_to_write = ((write_length + 3) / 4);
+
+ if (dw_to_write > empty_slots)
+ return 0;
+
+ write_heci_register(dev, H_CB_WW, *((__u32 *) header));
+
+ while (write_length >= 4) {
+ write_heci_register(dev, H_CB_WW,
+ *(__u32 *) (write_buffer + bytes_written));
+ bytes_written += 4;
+ write_length -= 4;
+ }
+
+ if (write_length > 0) {
+ memcpy(&temp_msg, &write_buffer[bytes_written], write_length);
+ write_heci_register(dev, H_CB_WW, temp_msg);
+ }
+
+ dev->host_hw_state |= H_IG;
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ if ((dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ return 0;
+
+ dev->write_hang = 0;
+ return 1;
+}
+
+/**
+ * count_full_read_slots - count read full slots.
+ *
+ * @dev: device object for our driver
+ *
+ * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise filled slots count
+ */
+__s32 count_full_read_slots(struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+ unsigned char buffer_depth, filled_slots;
+
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ buffer_depth = (unsigned char)((dev->me_hw_state & ME_CBD_HRA) >> 24);
+ read_ptr = (char) ((dev->me_hw_state & ME_CBRP_HRA) >> 8);
+ write_ptr = (char) ((dev->me_hw_state & ME_CBWP_HRA) >> 16);
+ filled_slots = (unsigned char) (write_ptr - read_ptr);
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ DBG("filled_slots =%08x \n", filled_slots);
+ return (__s32) filled_slots;
+}
+
+/**
+ * heci_read_slots - read a message from heci device.
+ *
+ * @dev: device object for our driver
+ * @buffer: message buffer will be write
+ * @buffer_length: message size will be read
+ */
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length)
+{
+ __u32 i = 0;
+ unsigned char temp_buf[sizeof(__u32)];
+
+ while (buffer_length >= sizeof(__u32)) {
+ ((__u32 *) buffer)[i] = read_heci_register(dev, ME_CB_RW);
+ DBG("buffer[%d]= %d\n", i, ((__u32 *) buffer)[i]);
+ i++;
+ buffer_length -= sizeof(__u32);
+ }
+
+ if (buffer_length > 0) {
+ *((__u32 *) &temp_buf) = read_heci_register(dev, ME_CB_RW);
+ memcpy(&buffer[i * 4], temp_buf, buffer_length);
+ }
+
+ dev->host_hw_state |= H_IG;
+ heci_set_csr_register(dev);
+}
+
+/**
+ * flow_ctrl_creds - check flow_control credentials.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if flow_ctrl_creds >0, 0 - otherwise.
+ */
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return 0;
+
+ if (file_ext == NULL)
+ return 0;
+
+ if (file_ext->flow_ctrl_creds > 0)
+ return 1;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].flow_ctrl_creds > 0) {
+ BUG_ON(dev->me_clients[i].props.single_recv_buf
+ == 0);
+ return 1;
+ }
+ return 0;
+ }
+ }
+ BUG();
+ return 0;
+}
+
+/**
+ * flow_ctrl_reduce - reduce flow_control.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ */
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].props.single_recv_buf != 0) {
+ BUG_ON(dev->me_clients[i].flow_ctrl_creds <= 0);
+ dev->me_clients[i].flow_ctrl_creds--;
+ } else {
+ BUG_ON(file_ext->flow_ctrl_creds <= 0);
+ file_ext->flow_ctrl_creds--;
+ }
+ return;
+ }
+ }
+ BUG();
+}
+
+/**
+ * heci_send_flow_control - send flow control to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_flow_control *heci_flow_control;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_flow_control);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_flow_control = (struct hbm_flow_control *) &dev->wr_msg_buf[1];
+ memset(heci_flow_control, 0, sizeof(heci_flow_control));
+ heci_flow_control->host_addr = file_ext->host_client_id;
+ heci_flow_control->me_addr = file_ext->me_client_id;
+ heci_flow_control->cmd.cmd = HECI_FLOW_CONTROL_CMD;
+ memset(heci_flow_control->reserved, 0,
+ sizeof(heci_flow_control->reserved));
+ DBG("sending flow control host client = %d, me client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_flow_control,
+ sizeof(struct hbm_flow_control)))
+ return 0;
+
+ return 1;
+
+}
+
+/**
+ * other_client_is_connecting - check if other
+ * client with the same client id is connected.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if other client is connected, 0 - otherwise.
+ */
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if ((file_pos->state == HECI_FILE_CONNECTING)
+ && (file_pos != file_ext)
+ && file_ext->me_client_id == file_pos->me_client_id)
+ return 1;
+
+ }
+ return 0;
+}
+
+/**
+ * heci_send_wd - send watch dog message to fw.
+ *
+ * @dev: device object for our driver
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_send_wd(struct iamt_heci_device *dev)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = dev->wd_file_ext.host_client_id;
+ heci_hdr->me_addr = dev->wd_file_ext.me_client_id;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ if (!memcmp(dev->wd_data, heci_start_wd_params,
+ HECI_WD_PARAMS_SIZE)) {
+ heci_hdr->length = HECI_START_WD_DATA_SIZE;
+ } else {
+ BUG_ON(memcmp(dev->wd_data, heci_stop_wd_params,
+ HECI_WD_PARAMS_SIZE));
+ heci_hdr->length = HECI_WD_PARAMS_SIZE;
+ }
+
+ if (!heci_write_message(dev, heci_hdr, dev->wd_data, heci_hdr->length))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_disconnect - send disconnect message to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_disconnect_request *heci_cli_disconnect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_disconnect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_disconnect =
+ (struct hbm_client_disconnect_request *) &dev->wr_msg_buf[1];
+ memset(heci_cli_disconnect, 0, sizeof(heci_cli_disconnect));
+ heci_cli_disconnect->host_addr = file_ext->host_client_id;
+ heci_cli_disconnect->me_addr = file_ext->me_client_id;
+ heci_cli_disconnect->cmd.cmd = CLIENT_DISCONNECT_REQ_CMD;
+ heci_cli_disconnect->reserved[0] = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_disconnect,
+ sizeof(struct hbm_client_disconnect_request)))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_connect - send connect message to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_request *heci_cli_connect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_connect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_connect =
+ (struct hbm_client_connect_request *) &dev->wr_msg_buf[1];
+ heci_cli_connect->host_addr = file_ext->host_client_id;
+ heci_cli_connect->me_addr = file_ext->me_client_id;
+ heci_cli_connect->cmd.cmd = CLIENT_CONNECT_REQ_CMD;
+ heci_cli_connect->reserved = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_connect,
+ sizeof(struct hbm_client_connect_request)))
+ return 0;
+
+ return 1;
+}
diff --git a/drivers/char/heci/heci_interface.h b/drivers/char/heci/heci_interface.h
new file mode 100644
index 0000000..37336eb
--- /dev/null
+++ b/drivers/char/heci/heci_interface.h
@@ -0,0 +1,170 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#ifndef _HECI_INTERFACE_H_
+#define _HECI_INTERFACE_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+
+#define HBM_MINOR_VERSION 0
+#define HBM_MAJOR_VERSION 1
+#define HBM_TIMEOUT 1 /* 1 second */
+
+
+#define HOST_START_REQ_CMD 0x01
+#define HOST_START_RES_CMD 0x81
+
+#define HOST_STOP_REQ_CMD 0x02
+#define HOST_STOP_RES_CMD 0x82
+
+#define ME_STOP_REQ_CMD 0x03
+
+#define HOST_ENUM_REQ_CMD 0x04
+#define HOST_ENUM_RES_CMD 0x84
+
+#define HOST_CLIENT_PROPERTEIS_REQ_CMD 0x05
+#define HOST_CLIENT_PROPERTEIS_RES_CMD 0x85
+
+#define CLIENT_CONNECT_REQ_CMD 0x06
+#define CLIENT_CONNECT_RES_CMD 0x86
+
+#define CLIENT_DISCONNECT_REQ_CMD 0x07
+#define CLIENT_DISCONNECT_RES_CMD 0x87
+
+#define HECI_FLOW_CONTROL_CMD 0x08
+
+
+#define AMT_WD_VALUE 120 /* seconds */
+
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+
+/* IOCTL commands */
+#define IOCTL_HECI_GET_VERSION \
+ _IOWR('H' , 0x0, struct heci_message_data)
+#define IOCTL_HECI_CONNECT_CLIENT \
+ _IOWR('H' , 0x01, struct heci_message_data)
+#define IOCTL_HECI_WD \
+ _IOWR('H' , 0x02, struct heci_message_data)
+#define IOCTL_HECI_BYPASS_WD \
+ _IOWR('H' , 0x10, struct heci_message_data)
+
+enum heci_stop_reason_types{
+ DRIVER_STOP_REQUEST = 0x00,
+ DEVICE_D1_ENTRY = 0x01,
+ DEVICE_D2_ENTRY = 0x02,
+ DEVICE_D3_ENTRY = 0x03,
+ SYSTEM_S1_ENTRY = 0x04,
+ SYSTEM_S2_ENTRY = 0x05,
+ SYSTEM_S3_ENTRY = 0x06,
+ SYSTEM_S4_ENTRY = 0x07,
+ SYSTEM_S5_ENTRY = 0x08
+};
+
+enum me_stop_reason_types{
+ FW_UPDATE = 0x00
+};
+
+enum client_connect_status_types{
+ CCS_SUCCESS = 0x00,
+ CCS_NOT_FOUND = 0x01,
+ CCS_ALREADY_STARTED = 0x02,
+ CCS_OUT_OF_RESOURCES = 0x03,
+ CCS_MESSAGE_SMALL = 0x04
+};
+
+enum client_disconnect_status_types{
+ CDS_SUCCESS = 0x00
+};
+
+
+/*
+ * heci interface function prototypes
+ */
+void heci_set_csr_register(struct iamt_heci_device *dev);
+void heci_csr_enable_interrupts(struct iamt_heci_device *dev);
+void heci_csr_disable_interrupts(struct iamt_heci_device *dev);
+
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length);
+
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length);
+
+int host_buffer_is_empty(struct iamt_heci_device *dev);
+
+__s32 count_full_read_slots(struct iamt_heci_device *dev);
+
+__s32 count_empty_write_slots(const struct iamt_heci_device *dev);
+
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_wd(struct iamt_heci_device *dev);
+
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+#endif /* _HECI_INTERFACE_H_ */
diff --git a/drivers/char/heci/heci_main.c b/drivers/char/heci/heci_main.c
new file mode 100644
index 0000000..c587c94
--- /dev/null
+++ b/drivers/char/heci/heci_main.c
@@ -0,0 +1,1563 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/device.h>
+#include <linux/unistd.h>
+#include <linux/kthread.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+#define HECI_READ_TIMEOUT 45
+
+#define HECI_DRIVER_NAME "heci"
+
+/*
+ * heci driver strings
+ */
+char heci_driver_name[] = HECI_DRIVER_NAME;
+char heci_driver_string[] = "Intel(R) Management Engine Interface";
+char heci_driver_version[] = HECI_DRIVER_VERSION;
+char heci_copyright[] = "Copyright (c) 2003 - 2008 Intel Corporation.";
+
+
+#ifdef HECI_DEBUG
+int heci_debug = 1;
+#else
+int heci_debug;
+#endif
+MODULE_PARM_DESC(heci_debug, "Debug enabled or not");
+module_param(heci_debug, int, 0644);
+
+
+#define HECI_DEV_NAME "heci"
+
+/* heci char device for registration */
+static struct cdev heci_cdev;
+
+/* major number for device */
+static int heci_major;
+/* The device pointer */
+static struct pci_dev *heci_device;
+
+struct class *heci_class;
+struct device *heci_dev;
+
+
+/* heci_pci_tbl - PCI Device ID Table */
+static struct pci_device_id heci_pci_tbl[] = {
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82946GZ)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82Q965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GM965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GME965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82G33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82X38)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_3200)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_6)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_7)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_8)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_9)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_10)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_4)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_4)},
+ /* required last entry */
+ {0, }
+};
+
+MODULE_DEVICE_TABLE(pci, heci_pci_tbl);
+
+/*
+ * Local Function Prototypes
+ */
+static int __init heci_init_module(void);
+static void __exit heci_exit_module(void);
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent);
+static void __devexit heci_remove(struct pci_dev *pdev);
+static int heci_open(struct inode *inode, struct file *file);
+static int heci_release(struct inode *inode, struct file *file);
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset);
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data);
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset);
+static unsigned int heci_poll(struct file *file, poll_table *wait);
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state);
+static int heci_resume(struct pci_dev *pdev);
+static __u16 g_sus_wd_timeout;
+#else
+#define heci_suspend NULL
+#define heci_resume NULL
+#endif
+/*
+ * PCI driver structure
+ */
+static struct pci_driver heci_driver = {
+ .name = heci_driver_name,
+ .id_table = heci_pci_tbl,
+ .probe = heci_probe,
+ .remove = __devexit_p(heci_remove),
+ .shutdown = __devexit_p(heci_remove),
+ .suspend = heci_suspend,
+ .resume = heci_resume
+};
+
+/*
+ * file operations structure will be use heci char device.
+ */
+static struct file_operations heci_fops = {
+ .owner = THIS_MODULE,
+ .read = heci_read,
+ .ioctl = heci_ioctl,
+ .open = heci_open,
+ .release = heci_release,
+ .write = heci_write,
+ .poll = heci_poll,
+};
+
+/**
+ * heci_registration_cdev - set up the cdev structure for heci device.
+ *
+ * @dev: char device struct
+ * @hminor: minor number for registration char device
+ * @fops: file operations structure
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_registration_cdev(struct cdev *dev, int hminor,
+ struct file_operations *fops)
+{
+ int ret, devno = MKDEV(heci_major, hminor);
+
+ cdev_init(dev, fops);
+ dev->owner = THIS_MODULE;
+ ret = cdev_add(dev, devno, 1);
+ /* Fail gracefully if need be */
+ if (ret) {
+ printk(KERN_ERR "heci: Error %d registering heci device %d\n",
+ ret, hminor);
+ }
+ return ret;
+}
+
+/* Display the version of heci driver. */
+static ssize_t version_show(struct class *dev, char *buf)
+{
+ return sprintf(buf, "%s %s.\n",
+ heci_driver_string, heci_driver_version);
+}
+
+static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
+
+/**
+ * heci_register_cdev - registers heci char device
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_register_cdev(void)
+{
+ int ret;
+ dev_t dev;
+
+ /* registration of char devices */
+ ret = alloc_chrdev_region(&dev, HECI_MINORS_BASE, HECI_MINORS_COUNT,
+ HECI_DRIVER_NAME);
+ if (ret) {
+ printk(KERN_ERR "heci: Error allocating char device region.\n");
+ return ret;
+ }
+
+ heci_major = MAJOR(dev);
+
+ ret = heci_registration_cdev(&heci_cdev, HECI_MINOR_NUMBER,
+ &heci_fops);
+ if (ret)
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+
+ return ret;
+}
+
+/**
+ * heci_unregister_cdev - unregisters heci char device
+ */
+static void heci_unregister_cdev(void)
+{
+ cdev_del(&heci_cdev);
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+}
+
+/**
+ * heci_sysfs_device_create - adds device entry to sysfs
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_sysfs_device_create(void)
+{
+ struct class *class;
+ struct device *tmphdev;
+ int err = 0;
+
+ class = class_create(THIS_MODULE, HECI_DRIVER_NAME);
+ if (IS_ERR(class)) {
+ err = PTR_ERR(class);
+ printk(KERN_ERR "heci: Error creating heci class.\n");
+ goto err_out;
+ }
+
+ err = class_create_file(class, &class_attr_version);
+ if (err) {
+ class_destroy(class);
+ printk(KERN_ERR "heci: Error creating heci class file.\n");
+ goto err_out;
+ }
+
+ tmphdev = device_create(class, NULL, heci_cdev.dev, NULL,
+ HECI_DEV_NAME);
+ if (IS_ERR(tmphdev)) {
+ err = PTR_ERR(tmphdev);
+ class_remove_file(class, &class_attr_version);
+ class_destroy(class);
+ goto err_out;
+ }
+
+ heci_dev = tmphdev;
+ heci_class = class;
+err_out:
+ return err;
+}
+
+/**
+ * heci_sysfs_device_remove - unregisters the device entry on sysfs
+ */
+static void heci_sysfs_device_remove(void)
+{
+ if ((heci_class == NULL) || (IS_ERR(heci_class)))
+ return;
+
+ heci_dev = NULL;
+ device_destroy(heci_class, heci_cdev.dev);
+ class_remove_file(heci_class, &class_attr_version);
+ class_destroy(heci_class);
+}
+
+/**
+ * heci_init_module - Driver Registration Routine
+ *
+ * heci_init_module is the first routine called when the driver is
+ * loaded. All it does is register with the PCI subsystem.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int __init heci_init_module(void)
+{
+ int ret = 0;
+
+ printk(KERN_INFO "heci: %s - version %s\n", heci_driver_string,
+ heci_driver_version);
+ printk(KERN_INFO "heci: %s\n", heci_copyright);
+
+ /* init pci module */
+ ret = pci_register_driver(&heci_driver);
+ if (ret < 0) {
+ printk(KERN_ERR "heci: Error registering driver.\n");
+ goto end;
+ }
+
+ ret = heci_register_cdev();
+ if (ret)
+ goto unregister_pci;
+
+ ret = heci_sysfs_device_create();
+ if (ret)
+ goto unregister_cdev;
+
+ return ret;
+
+unregister_cdev:
+ heci_unregister_cdev();
+unregister_pci:
+ pci_unregister_driver(&heci_driver);
+end:
+ return ret;
+}
+
+module_init(heci_init_module);
+
+
+/**
+ * heci_exit_module - Driver Exit Cleanup Routine
+ *
+ * heci_exit_module is called just before the driver is removed
+ * from memory.
+ */
+static void __exit heci_exit_module(void)
+{
+ pci_unregister_driver(&heci_driver);
+ heci_sysfs_device_remove();
+ heci_unregister_cdev();
+}
+
+module_exit(heci_exit_module);
+
+
+/**
+ * heci_probe - Device Initialization Routine
+ *
+ * @pdev: PCI device information struct
+ * @ent: entry in kcs_pci_tbl
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct iamt_heci_device *dev = NULL;
+ int i, err = 0;
+
+ if (heci_device) {
+ err = -EEXIST;
+ goto end;
+ }
+ /* enable pci dev */
+ err = pci_enable_device(pdev);
+ if (err) {
+ printk(KERN_ERR "heci: Failed to enable pci device.\n");
+ goto end;
+ }
+ /* set PCI host mastering */
+ pci_set_master(pdev);
+ /* pci request regions for heci driver */
+ err = pci_request_regions(pdev, heci_driver_name);
+ if (err) {
+ printk(KERN_ERR "heci: Failed to get pci regions.\n");
+ goto disable_device;
+ }
+ /* allocates and initializes the heci dev structure */
+ dev = init_heci_device(pdev);
+ if (!dev) {
+ err = -ENOMEM;
+ goto release_regions;
+ }
+ /* mapping IO device memory */
+ for (i = 0; i <= 5; i++) {
+ if (pci_resource_len(pdev, i) == 0)
+ continue;
+ if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
+ printk(KERN_ERR "heci: heci has IO ports.\n");
+ goto free_device;
+ } else if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
+ if (dev->mem_base) {
+ printk(KERN_ERR
+ "heci: Too many mem addresses.\n");
+ goto free_device;
+ }
+ dev->mem_base = pci_resource_start(pdev, i);
+ dev->mem_length = pci_resource_len(pdev, i);
+ }
+ }
+ if (!dev->mem_base) {
+ printk(KERN_ERR "heci: No address to use.\n");
+ err = -ENODEV;
+ goto free_device;
+ }
+ dev->mem_addr = ioremap_nocache(dev->mem_base,
+ dev->mem_length);
+ if (!dev->mem_addr) {
+ printk(KERN_ERR "heci: Remap IO device memory failure.\n");
+ err = -ENOMEM;
+ goto free_device;
+ }
+ /* request and enable interrupt */
+ err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, dev);
+ if (err) {
+ printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
+ pdev->irq);
+ goto unmap_memory;
+ }
+
+ if (heci_hw_init(dev)) {
+ printk(KERN_ERR "heci: Init hw failure.\n");
+ err = -ENODEV;
+ goto release_irq;
+ }
+ init_timer(&dev->wd_timer);
+
+ heci_initialize_clients(dev);
+ if (dev->heci_state != HECI_ENABLED) {
+ err = -ENODEV;
+ goto release_hw;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ heci_device = pdev;
+ pci_set_drvdata(pdev, dev);
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->wd_timeout)
+ mod_timer(&dev->wd_timer, jiffies);
+
+#ifdef CONFIG_PM
+ g_sus_wd_timeout = 0;
+#endif
+ printk(KERN_INFO "heci driver initialization successful.\n");
+ return 0;
+
+release_hw:
+ /* disable interrupts */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ heci_csr_disable_interrupts(dev);
+
+ del_timer_sync(&dev->wd_timer);
+
+ flush_scheduled_work();
+
+release_irq:
+ free_irq(pdev->irq, dev);
+unmap_memory:
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+free_device:
+ kfree(dev);
+release_regions:
+ pci_release_regions(pdev);
+disable_device:
+ pci_disable_device(pdev);
+end:
+ printk(KERN_ERR "heci driver initialization failed.\n");
+ return err;
+}
+
+/**
+ * heci_remove - Device Removal Routine
+ *
+ * @pdev: PCI device information struct
+ *
+ * heci_remove is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.
+ */
+static void __devexit heci_remove(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *dev = pci_get_drvdata(pdev);
+
+ if (heci_device != pdev)
+ return;
+
+ if (dev == NULL)
+ return;
+
+ spin_lock_bh(&dev->device_lock);
+ if (heci_device != pdev) {
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+
+ del_timer_sync(&dev->wd_timer);
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
+ && dev->wd_timeout) {
+ dev->wd_timeout = 0;
+ dev->wd_due_counter = 0;
+ memcpy(dev->wd_data, heci_stop_wd_params, HECI_WD_PARAMS_SIZE);
+ dev->stop = 1;
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+
+ if (!heci_send_wd(dev))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+ } else {
+ dev->wd_pending = 1;
+ }
+ dev->wd_stoped = 0;
+ spin_unlock_bh(&dev->device_lock);
+
+ wait_event_interruptible_timeout(dev->wait_stop_wd,
+ (dev->wd_stoped), 10 * HZ);
+ spin_lock_bh(&dev->device_lock);
+ if (!dev->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else
+ DBG("stop wd complete.\n");
+
+ }
+
+ heci_device = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->iamthif_file_ext.state == HECI_FILE_CONNECTED) {
+ dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->iamthif_file_ext);
+ }
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED) {
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->wd_file_ext);
+ }
+
+ spin_lock_bh(&dev->device_lock);
+
+ /* remove entry if already in list */
+ DBG("list del iamthif and wd file list.\n");
+ heci_remove_client_from_file_list(dev, dev->wd_file_ext.
+ host_client_id);
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+
+ dev->iamthif_current_cb = NULL;
+ dev->iamthif_file_ext.file = NULL;
+ dev->num_heci_me_clients = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ flush_scheduled_work();
+
+ /* disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ free_irq(pdev->irq, dev);
+ pci_set_drvdata(pdev, NULL);
+
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+
+ kfree(dev);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+}
+
+/**
+ * heci_clear_list - remove all callbacks associated with file
+ * from heci_cb_list
+ *
+ * @file: file information struct
+ * @heci_cb_list: callbacks list
+ *
+ * heci_clear_list is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * returns 1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_list(struct iamt_heci_device *dev,
+ struct file *file, struct list_head *heci_cb_list)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private*priv_cb_next = NULL;
+ struct file *file_temp;
+ int rets = 0;
+
+ /* list all list member */
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ heci_cb_list, cb_list) {
+ file_temp = (struct file *)priv_cb_pos->file_object;
+ /* check if list member associated with a file */
+ if (file_temp == file) {
+ /* remove member from the list */
+ list_del(&priv_cb_pos->cb_list);
+ /* check if cb equal to current iamthif cb */
+ if (dev->iamthif_current_cb == priv_cb_pos) {
+ dev->iamthif_current_cb = NULL;
+ /* send flow control to iamthif client */
+ heci_send_flow_control(dev,
+ &dev->iamthif_file_ext);
+ }
+ /* free all allocated buffers */
+ heci_free_cb_private(priv_cb_pos);
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_clear_lists - remove all callbacks associated with file
+ *
+ * @dev: device information struct
+ * @file: file information struct
+ *
+ * heci_clear_lists is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * returns 1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_lists(struct iamt_heci_device *dev, struct file *file)
+{
+ int rets = 0;
+
+ /* remove callbacks associated with a file */
+ heci_clear_list(dev, file, &dev->pthi_cmd_list.heci_cb.cb_list);
+ if (heci_clear_list(dev, file,
+ &dev->pthi_read_complete_list.heci_cb.cb_list))
+ rets = 1;
+
+ heci_clear_list(dev, file, &dev->ctrl_rd_list.heci_cb.cb_list);
+
+ if (heci_clear_list(dev, file, &dev->ctrl_wr_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file,
+ &dev->write_waiting_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file, &dev->write_list.heci_cb.cb_list))
+ rets = 1;
+
+ /* check if iamthif_current_cb not NULL */
+ if (dev->iamthif_current_cb && (!rets)) {
+ /* check file and iamthif current cb association */
+ if (dev->iamthif_current_cb->file_object == file) {
+ /* remove cb */
+ heci_free_cb_private(dev->iamthif_current_cb);
+ dev->iamthif_current_cb = NULL;
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_open - the open function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ *
+ * returns 0 on success, <0 on error
+ */
+static int heci_open(struct inode *inode, struct file *file)
+{
+ struct heci_file_private *file_ext;
+ int if_num = iminor(inode);
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ file_ext = heci_alloc_file_private(file);
+ if (file_ext == NULL)
+ return -ENOMEM;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENODEV;
+ }
+ if (dev->open_handle_count >= HECI_MAX_OPEN_HANDLE_COUNT) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENFILE;
+ };
+ dev->open_handle_count++;
+ list_add_tail(&file_ext->link, &dev->file_list);
+ while ((dev->heci_host_clients[dev->current_host_client_id / 8]
+ & (1 << (dev->current_host_client_id % 8))) != 0) {
+
+ dev->current_host_client_id++; /* allow overflow */
+ DBG("current_host_client_id = %d\n",
+ dev->current_host_client_id);
+ DBG("dev->open_handle_count = %lu\n",
+ dev->open_handle_count);
+ }
+ DBG("current_host_client_id = %d\n", dev->current_host_client_id);
+ file_ext->host_client_id = dev->current_host_client_id;
+ dev->heci_host_clients[file_ext->host_client_id / 8] |=
+ (1 << (file_ext->host_client_id % 8));
+ spin_unlock_bh(&dev->device_lock);
+ spin_lock(&file_ext->file_lock);
+ file_ext->state = HECI_FILE_INITIALIZING;
+ file_ext->sm_state = 0;
+
+ file->private_data = file_ext;
+ spin_unlock(&file_ext->file_lock);
+
+ return 0;
+}
+
+/**
+ * heci_release - the release function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ *
+ * returns 0 on success, <0 on error
+ */
+static int heci_release(struct inode *inode, struct file *file)
+{
+ int rets = 0;
+ int if_num = iminor(inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext != &dev->iamthif_file_ext) {
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state == HECI_FILE_CONNECTED) {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ spin_unlock(&file_ext->file_lock);
+ DBG("disconnecting client host client = %d, "
+ "ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+ rets = heci_disconnect_host_client(dev, file_ext);
+ spin_lock(&file_ext->file_lock);
+ }
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_queues(dev, file_ext);
+ DBG("remove client host client = %d, ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ if (dev->open_handle_count > 0) {
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ dev->open_handle_count--;
+ }
+ heci_remove_client_from_file_list(dev,
+ file_ext->host_client_id);
+
+ /* free read cb */
+ if (file_ext->read_cb != NULL) {
+ priv_cb = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb != NULL)
+ list_del(&priv_cb->cb_list);
+
+ priv_cb = file_ext->read_cb;
+ file_ext->read_cb = NULL;
+ }
+
+ spin_unlock_bh(&dev->device_lock);
+ file->private_data = NULL;
+ spin_unlock(&file_ext->file_lock);
+
+ if (priv_cb != NULL)
+ heci_free_cb_private(priv_cb);
+
+ kfree(file_ext);
+ } else {
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->open_handle_count > 0)
+ dev->open_handle_count--;
+
+ if (dev->iamthif_file_object == file
+ && dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi canceled iamthif state %d\n",
+ dev->iamthif_state);
+ dev->iamthif_canceled = 1;
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE) {
+ DBG("run next pthi iamthif cb\n");
+ run_next_iamthif_cmd(dev);
+ }
+ }
+
+ if (heci_clear_lists(dev, file))
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+
+ spin_unlock_bh(&dev->device_lock);
+ }
+ return rets;
+}
+
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ struct heci_file_private *file_ext_list_temp;
+
+ if (dev->read_list.status == 0
+ && !list_empty(&dev->read_list.heci_cb.cb_list)) {
+ DBG("remove read_list CB \n");
+ list_for_each_entry_safe(priv_cb_pos,
+ priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+
+ file_ext_list_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext_list_temp != NULL) &&
+ heci_fe_same_id(file_ext, file_ext_list_temp))
+ return priv_cb_pos;
+
+ }
+ }
+ return NULL;
+}
+
+/**
+ * heci_read - the read client message function.
+ *
+ * @file: pointer to file structure
+ * @ubuf: pointer to user buffer
+ * @length: buffer length
+ * @offset: data offset in buffer
+ *
+ * returns >=0 data length on success , <0 on error
+ */
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int i;
+ int rets = 0, err = 0;
+ int if_num = iminor(file->f_dentry->d_inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ spin_lock(&file_ext->file_lock);
+ if ((file_ext->sm_state & HECI_WD_STATE_INDEPENDENCE_MSG_SENT) == 0) {
+ spin_unlock(&file_ext->file_lock);
+ /* Do not allow to read watchdog client */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_wd_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (file_ext->me_client_id ==
+ dev->me_clients[i].client_id)
+ return -EBADF;
+ }
+ }
+ } else {
+ file_ext->sm_state &= ~HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+ }
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ rets = pthi_read(dev, if_num, file, ubuf, length, offset);
+ goto out;
+ }
+
+ if (file_ext->read_cb && file_ext->read_cb->information > *offset) {
+ priv_cb = file_ext->read_cb;
+ goto copy_buffer;
+ } else if (file_ext->read_cb && file_ext->read_cb->information > 0 &&
+ file_ext->read_cb->information <= *offset) {
+ priv_cb = file_ext->read_cb;
+ rets = 0;
+ goto free;
+ } else if ((!file_ext->read_cb || file_ext->read_cb->information == 0)
+ && *offset > 0) {
+ /*Offset needs to be cleaned for contingous reads*/
+ *offset = 0;
+ rets = 0;
+ goto out;
+ }
+
+ spin_lock(&file_ext->read_io_lock);
+ err = heci_start_read(dev, if_num, file_ext);
+ if (err != 0 && err != -EBUSY) {
+ DBG("heci start read failure with status = %d\n", err);
+ spin_unlock(&file_ext->read_io_lock);
+ rets = err;
+ goto out;
+ }
+ if (HECI_READ_COMPLETE != file_ext->reading_state
+ && !waitqueue_active(&file_ext->rx_wait)) {
+ if (file->f_flags & O_NONBLOCK) {
+ rets = -EAGAIN;
+ spin_unlock(&file_ext->read_io_lock);
+ goto out;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+
+ if (wait_event_interruptible(file_ext->rx_wait,
+ (HECI_READ_COMPLETE == file_ext->reading_state
+ || HECI_FILE_INITIALIZING == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTING == file_ext->state))) {
+ if (signal_pending(current)) {
+ rets = -EINTR;
+ goto out;
+ }
+ return -ERESTARTSYS;
+ }
+
+ if (HECI_FILE_INITIALIZING == file_ext->state ||
+ HECI_FILE_DISCONNECTED == file_ext->state ||
+ HECI_FILE_DISCONNECTING == file_ext->state) {
+ rets = -EBUSY;
+ goto out;
+ }
+ spin_lock(&file_ext->read_io_lock);
+ }
+
+ priv_cb = file_ext->read_cb;
+
+ if (!priv_cb) {
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENODEV;
+ }
+ if (file_ext->reading_state != HECI_READ_COMPLETE) {
+ spin_unlock(&file_ext->read_io_lock);
+ return 0;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+ /* now copy the data to user space */
+copy_buffer:
+ DBG("priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("priv_cb->information - %lu\n",
+ priv_cb->information);
+ if (length == 0 || ubuf == NULL ||
+ *offset > priv_cb->information) {
+ rets = -EMSGSIZE;
+ goto free;
+ }
+
+ /* length is being turncated to PAGE_SIZE, however, */
+ /* information size may be longer */
+ length = (length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset));
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length)) {
+ rets = -EFAULT;
+ goto free;
+ }
+
+ rets = length;
+ *offset += length;
+ if ((unsigned long)*offset < priv_cb->information)
+ goto out;
+
+free:
+ spin_lock_bh(&dev->device_lock);
+ priv_cb_pos = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb_pos != NULL)
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_cb);
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+out: DBG("end heci read rets= %d\n", rets);
+ return rets;
+}
+
+/**
+ * heci_write - the write function.
+ *
+ * @file: pointer to file structure
+ * @ubuf: pointer to user buffer
+ * @length: buffer length
+ * @offset: data offset in buffer
+ *
+ * returns >=0 data length on success , <0 on error
+ */
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int rets = 0;
+ __u8 i;
+ int if_num = iminor(file->f_dentry->d_inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_write_cb = NULL;
+ struct heci_msg_hdr heci_hdr;
+ struct iamt_heci_device *dev;
+ unsigned long currtime = get_seconds();
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb = find_pthi_read_list_entry(dev, file);
+ if ((priv_write_cb != NULL) &&
+ (((currtime - priv_write_cb->read_time) >
+ IAMTHIF_READ_TIMER) ||
+ (file_ext->reading_state == HECI_READ_COMPLETE))) {
+ (*offset) = 0;
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ priv_write_cb = NULL;
+ }
+ }
+
+ /* free entry used in read */
+ if (file_ext->reading_state == HECI_READ_COMPLETE) {
+ *offset = 0;
+ priv_write_cb = find_read_list_entry(dev, file_ext);
+ if (priv_write_cb != NULL) {
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ priv_write_cb = NULL;
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+ }
+ } else if (file_ext->reading_state == HECI_IDLE &&
+ file_ext->read_pending == 0)
+ (*offset) = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ priv_write_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_write_cb)
+ return -ENOMEM;
+
+ priv_write_cb->file_object = file;
+ priv_write_cb->file_private = file_ext;
+ priv_write_cb->request_buffer.data = kmalloc(length, GFP_KERNEL);
+ if (!priv_write_cb->request_buffer.data) {
+ kfree(priv_write_cb);
+ return -ENOMEM;
+ }
+ DBG("length =%d\n", (int) length);
+
+ if (copy_from_user(priv_write_cb->request_buffer.data,
+ ubuf, length)) {
+ rets = -EFAULT;
+ goto fail;
+ }
+
+ spin_lock(&file_ext->file_lock);
+ file_ext->sm_state = 0;
+ if ((length == 4) &&
+ ((memcmp(heci_wd_state_independence_msg[0], ubuf, 4) == 0) ||
+ (memcmp(heci_wd_state_independence_msg[1], ubuf, 4) == 0) ||
+ (memcmp(heci_wd_state_independence_msg[2], ubuf, 4) == 0)))
+ file_ext->sm_state |= HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+
+ INIT_LIST_HEAD(&priv_write_cb->cb_list);
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb->response_buffer.data =
+ kmalloc(IAMTHIF_MTU, GFP_KERNEL);
+ if (!priv_write_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->iamthif_file_ext.me_client_id)
+ break;
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients) ||
+ (dev->me_clients[i].client_id !=
+ dev->iamthif_file_ext.me_client_id)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ } else if ((length > dev->me_clients[i].props.max_msg_length)
+ || (length <= 0)) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -EMSGSIZE;
+ goto fail;
+ }
+
+
+ priv_write_cb->response_buffer.size = IAMTHIF_MTU;
+ priv_write_cb->major_file_operations = HECI_IOCTL;
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+
+ if (!list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)
+ || dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi_state = %d\n", (int) dev->iamthif_state);
+ DBG("add PTHI cb to pthi cmd waiting list\n");
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->pthi_cmd_list.heci_cb.cb_list);
+ rets = length;
+ } else {
+ DBG("call pthi write\n");
+ rets = pthi_write(dev, priv_write_cb);
+
+ if (rets != 0) {
+ DBG("pthi write failed with status = %d\n",
+ rets);
+ spin_unlock_bh(&dev->device_lock);
+ goto fail;
+ }
+ rets = length;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+ }
+
+ priv_write_cb->major_file_operations = HECI_WRITE;
+ /* make sure information is zero before we start */
+
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+
+ spin_lock(&file_ext->write_io_lock);
+ DBG("host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (file_ext->state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ DBG("host client = %d, is not connected to ME client = %d",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ goto unlock;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ file_ext->me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if (i == dev->num_heci_me_clients) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+ if (length > dev->me_clients[i].props.max_msg_length || length <= 0) {
+ rets = -EINVAL;
+ goto unlock;
+ }
+ priv_write_cb->file_private = file_ext;
+
+ spin_lock_bh(&dev->device_lock);
+ if (flow_ctrl_creds(dev, file_ext) &&
+ dev->host_buffer_is_empty) {
+ spin_unlock_bh(&dev->device_lock);
+ dev->host_buffer_is_empty = 0;
+ if (length > ((((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr))) {
+
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) -
+ sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = length;
+ heci_hdr.msg_complete = 1;
+ }
+ heci_hdr.host_addr = file_ext->host_client_id;
+ heci_hdr.me_addr = file_ext->me_client_id;
+ heci_hdr.reserved = 0;
+ DBG("call heci_write_message header=%08x.\n",
+ *((__u32 *) &heci_hdr));
+ spin_unlock(&file_ext->write_io_lock);
+ /* protect heci low level write */
+ spin_lock_bh(&dev->device_lock);
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *) (priv_write_cb->request_buffer.data),
+ heci_hdr.length)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_write_cb);
+ rets = -ENODEV;
+ priv_write_cb->information = 0;
+ return rets;
+ }
+ file_ext->writing_state = HECI_WRITING;
+ priv_write_cb->information = heci_hdr.length;
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, file_ext);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ } else {
+
+ spin_unlock_bh(&dev->device_lock);
+ priv_write_cb->information = 0;
+ file_ext->writing_state = HECI_WRITING;
+ spin_unlock(&file_ext->write_io_lock);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return length;
+
+unlock:
+ spin_unlock(&file_ext->write_io_lock);
+fail:
+ heci_free_cb_private(priv_write_cb);
+ return rets;
+
+}
+
+/**
+ * heci_ioctl - the IOCTL function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ * @cmd: ioctl command
+ * @data: pointer to heci message structure
+ *
+ * returns 0 on success , <0 on error
+ */
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data)
+{
+ int rets = 0;
+ int if_num = iminor(inode);
+ struct heci_file_private *file_ext = file->private_data;
+ /* in user space */
+ struct heci_message_data *u_msg = (struct heci_message_data *) data;
+ struct heci_message_data k_msg; /* all in kernel on the stack */
+ struct iamt_heci_device *dev;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ /* first copy from user all data needed */
+ if (copy_from_user(&k_msg, u_msg, sizeof(k_msg))) {
+ DBG("first copy from user all data needed filled\n");
+ return -EFAULT;
+ }
+ DBG("user message size is %d\n", k_msg.size);
+
+ switch (cmd) {
+ case IOCTL_HECI_GET_VERSION:
+ DBG(": IOCTL_HECI_GET_VERSION\n");
+ rets = heci_ioctl_get_version(dev, if_num, u_msg, k_msg,
+ file_ext);
+ break;
+
+ case IOCTL_HECI_CONNECT_CLIENT:
+ DBG(": IOCTL_HECI_CONNECT_CLIENT.\n");
+ rets = heci_ioctl_connect_client(dev, if_num, u_msg, k_msg,
+ file);
+ break;
+
+ case IOCTL_HECI_WD:
+ DBG(": IOCTL_HECI_WD.\n");
+ rets = heci_ioctl_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ case IOCTL_HECI_BYPASS_WD:
+ DBG(": IOCTL_HECI_BYPASS_WD.\n");
+ rets = heci_ioctl_bypass_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ default:
+ rets = -EINVAL;
+ break;
+ }
+ return rets;
+}
+
+/**
+ * heci_poll - the poll function
+ *
+ * @file: pointer to file structure
+ * @wait: pointer to poll_table structure
+ *
+ * returns poll mask
+ */
+static unsigned int heci_poll(struct file *file, poll_table *wait)
+{
+ int if_num = iminor(file->f_dentry->d_inode);
+ unsigned int mask = 0;
+ struct heci_file_private *file_ext = file->private_data;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return mask;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return mask;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return mask;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ poll_wait(file, &dev->iamthif_file_ext.wait, wait);
+ spin_lock(&dev->iamthif_file_ext.file_lock);
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE
+ && dev->iamthif_file_object == file) {
+ mask |= (POLLIN | POLLRDNORM);
+ spin_lock_bh(&dev->device_lock);
+ DBG("run next pthi cb\n");
+ run_next_iamthif_cmd(dev);
+ spin_unlock_bh(&dev->device_lock);
+ }
+ spin_unlock(&dev->iamthif_file_ext.file_lock);
+
+ } else{
+ poll_wait(file, &file_ext->tx_wait, wait);
+ spin_lock(&file_ext->write_io_lock);
+ if (HECI_WRITE_COMPLETE == file_ext->writing_state)
+ mask |= (POLLIN | POLLRDNORM);
+
+ spin_unlock(&file_ext->write_io_lock);
+ }
+
+ return mask;
+}
+
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct iamt_heci_device *dev = pci_get_drvdata(pdev);
+ int err = 0;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ /* Stop watchdog if exists */
+ del_timer_sync(&dev->wd_timer);
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
+ && dev->wd_timeout) {
+ spin_lock_bh(&dev->device_lock);
+ g_sus_wd_timeout = dev->wd_timeout;
+ dev->wd_timeout = 0;
+ dev->wd_due_counter = 0;
+ memcpy(dev->wd_data, heci_stop_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ dev->stop = 1;
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_wd(dev))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+ } else {
+ dev->wd_pending = 1;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ dev->wd_stoped = 0;
+
+ err = wait_event_interruptible_timeout(dev->wait_stop_wd,
+ (dev->wd_stoped),
+ 10 * HZ);
+ if (!dev->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else {
+ DBG("stop wd complete %d.\n", err);
+ err = 0;
+ }
+ }
+ /* Set new heci state */
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state == HECI_ENABLED ||
+ dev->heci_state == HECI_RECOVERING_FROM_RESET) {
+ dev->heci_state = HECI_POWER_DOWN;
+ heci_reset(dev, 0);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ pci_save_state(pdev);
+
+ pci_disable_device(pdev);
+ free_irq(pdev->irq, dev);
+
+ pci_set_power_state(pdev, PCI_D3hot);
+
+ return err;
+}
+
+static int heci_resume(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *dev;
+ int err = 0;
+
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+
+ dev = pci_get_drvdata(pdev);
+ if (!dev)
+ return -ENODEV;
+
+ /* request and enable interrupt */
+ err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, dev);
+ if (err) {
+ printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
+ pdev->irq);
+ return err;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_POWER_UP;
+ heci_reset(dev, 1);
+ spin_unlock_bh(&dev->device_lock);
+
+ /* Start watchdog if stopped in suspend */
+ if (g_sus_wd_timeout != 0) {
+ dev->wd_timeout = g_sus_wd_timeout;
+
+ memcpy(dev->wd_data, heci_start_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
+ &dev->wd_timeout, sizeof(__u16));
+ dev->wd_due_counter = 1;
+
+ if (dev->wd_timeout)
+ mod_timer(&dev->wd_timer, jiffies);
+
+ g_sus_wd_timeout = 0;
+ }
+ return err;
+}
+#endif
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(HECI_DRIVER_VERSION);
diff --git a/drivers/char/heci/heci_version.h b/drivers/char/heci/heci_version.h
new file mode 100644
index 0000000..797e84e
--- /dev/null
+++ b/drivers/char/heci/heci_version.h
@@ -0,0 +1,54 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef HECI_VERSION_H
+#define HECI_VERSION_H
+
+#define MAJOR_VERSION 5
+#define MINOR_VERSION 0
+#define QUICK_FIX_NUMBER 0
+#define VER_BUILD 30
+
+#define HECI_DRV_VER1 __stringify(MAJOR_VERSION) "." __stringify(MINOR_VERSION)
+#define HECI_DRV_VER2 __stringify(QUICK_FIX_NUMBER) "." __stringify(VER_BUILD)
+
+#define HECI_DRIVER_VERSION HECI_DRV_VER1 "." HECI_DRV_VER2
+
+#endif
diff --git a/drivers/char/heci/interrupt.c b/drivers/char/heci/interrupt.c
new file mode 100644
index 0000000..aacd262
--- /dev/null
+++ b/drivers/char/heci/interrupt.c
@@ -0,0 +1,1553 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/kthread.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+
+/*
+ * interrupt function prototypes
+ */
+static void heci_bh_handler(struct work_struct *work);
+static int heci_bh_read_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static int heci_bh_write_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *connect_res);
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *disconnect_res);
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control);
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req);
+
+
+/**
+ * heci_isr_interrupt - The ISR of the HECI device
+ *
+ * @irq: The irq number
+ * @dev_id: pointer to the device structure
+ *
+ * returns irqreturn_t
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id)
+{
+ int err;
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) dev_id;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+
+ if ((dev->host_hw_state & H_IS) != H_IS)
+ return IRQ_NONE;
+
+ /* disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ /*
+ * Our device interrupted, schedule work the heci_bh_handler
+ * to handle the interrupt processing. This needs to be a
+ * workqueue item since the handler can sleep.
+ */
+ PREPARE_WORK(&dev->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler.\n");
+ err = schedule_work(&dev->work);
+ if (!err) {
+ printk(KERN_ERR "heci: schedule the heci_bh_handler"
+ " failed error=%x\n", err);
+ }
+ return IRQ_HANDLED;
+}
+
+/**
+ * _heci_cmpl - process completed operation.
+ *
+ * @file_ext: private data of the file object.
+ * @priv_cb_pos: callback block.
+ */
+static void _heci_cmpl(struct heci_file_private *file_ext,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (priv_cb_pos->major_file_operations == HECI_WRITE) {
+ heci_free_cb_private(priv_cb_pos);
+ DBG("completing write call back.\n");
+ file_ext->writing_state = HECI_WRITE_COMPLETE;
+ if ((&file_ext->tx_wait) &&
+ waitqueue_active(&file_ext->tx_wait))
+ wake_up_interruptible(&file_ext->tx_wait);
+
+ } else if (priv_cb_pos->major_file_operations == HECI_READ
+ && HECI_READING == file_ext->reading_state) {
+ DBG("completing read call back information= %lu\n",
+ priv_cb_pos->information);
+ file_ext->reading_state = HECI_READ_COMPLETE;
+ if ((&file_ext->rx_wait) &&
+ waitqueue_active(&file_ext->rx_wait))
+ wake_up_interruptible(&file_ext->rx_wait);
+
+ }
+}
+
+/**
+ * _heci_cmpl_iamthif - process completed iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @priv_cb_pos: callback block.
+ */
+static void _heci_cmpl_iamthif(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (dev->iamthif_canceled != 1) {
+ dev->iamthif_state = HECI_IAMTHIF_READ_COMPLETE;
+ dev->iamthif_stall_timer = 0;
+ memcpy(priv_cb_pos->response_buffer.data,
+ dev->iamthif_msg_buf,
+ dev->iamthif_msg_buf_index);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->pthi_read_complete_list.heci_cb.cb_list);
+ DBG("pthi read completed.\n");
+ } else {
+ run_next_iamthif_cmd(dev);
+ }
+ if (&dev->iamthif_file_ext.wait) {
+ DBG("completing pthi call back.\n");
+ wake_up_interruptible(&dev->iamthif_file_ext.wait);
+ }
+}
+/**
+ * heci_bh_handler - function called after ISR to handle the interrupt
+ * processing.
+ *
+ * @work: pointer to the work structure
+ *
+ * NOTE: This function is called by schedule work
+ */
+static void heci_bh_handler(struct work_struct *work)
+{
+ struct iamt_heci_device *dev =
+ container_of(work, struct iamt_heci_device, work);
+ struct io_heci_list complete_list;
+ __s32 slots;
+ int rets;
+ struct heci_cb_private *cb_pos = NULL, *cb_next = NULL;
+ struct heci_file_private *file_ext;
+ int bus_message_received = 0;
+ struct task_struct *tsk;
+
+ DBG("function called after ISR to handle the interrupt processing.\n");
+ /* initialize our complete list */
+ spin_lock_bh(&dev->device_lock);
+ heci_initialize_list(&complete_list, dev);
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ /* check if ME wants a reset */
+ if (((dev->me_hw_state & ME_RDY_HRA) == 0)
+ && (dev->heci_state != HECI_RESETING)
+ && (dev->heci_state != HECI_INITIALIZING)) {
+ DBG("FW not ready.\n");
+ heci_reset(dev, 1);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ /* check if we need to start the dev */
+ if ((dev->host_hw_state & H_RDY) == 0) {
+ if ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA) {
+ DBG("we need to start the dev.\n");
+ dev->host_hw_state |= (H_IE | H_IG | H_RDY);
+ heci_set_csr_register(dev);
+ if (dev->heci_state == HECI_INITIALIZING) {
+ dev->recvd_msg = 1;
+ spin_unlock_bh(&dev->device_lock);
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ return;
+
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ tsk = kthread_run(heci_task_initialize_clients,
+ dev, "heci_reinit");
+ if (IS_ERR(tsk)) {
+ int rc = PTR_ERR(tsk);
+ printk(KERN_WARNING "heci: Unable to"
+ "start the heci thread: %d\n", rc);
+ }
+ return;
+ }
+ } else {
+ DBG("enable interrupt FW not ready.\n");
+ heci_csr_enable_interrupts(dev);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ }
+ /* check slots avalable for reading */
+ slots = count_full_read_slots(dev);
+ DBG("slots =%08x extra_write_index =%08x.\n",
+ slots, dev->extra_write_index);
+ while ((slots > 0) && (!dev->extra_write_index)) {
+ DBG("slots =%08x extra_write_index =%08x.\n", slots,
+ dev->extra_write_index);
+ DBG("call heci_bh_read_handler.\n");
+ rets = heci_bh_read_handler(&complete_list, dev, &slots);
+ if (rets != 0)
+ goto end;
+ }
+ rets = heci_bh_write_handler(&complete_list, dev, &slots);
+end:
+ DBG("end of bottom half function.\n");
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ /* acknowledge interrupt and disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ PREPARE_WORK(&dev->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler.\n");
+ rets = schedule_work(&dev->work);
+ if (!rets) {
+ printk(KERN_ERR "heci: schedule the heci_bh_handler"
+ " failed error=%x\n", rets);
+ }
+ } else {
+ heci_csr_enable_interrupts(dev);
+ }
+
+ if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) {
+ DBG("received waiting bus message\n");
+ bus_message_received = 1;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ if (bus_message_received) {
+ DBG("wake up dev->wait_recvd_msg\n");
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ bus_message_received = 0;
+ }
+ if ((complete_list.status != 0)
+ || list_empty(&complete_list.heci_cb.cb_list))
+ return;
+
+
+ list_for_each_entry_safe(cb_pos, cb_next,
+ &complete_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)cb_pos->file_private;
+ list_del(&cb_pos->cb_list);
+ if (file_ext != NULL) {
+ if (file_ext != &dev->iamthif_file_ext) {
+ DBG("completing call back.\n");
+ _heci_cmpl(file_ext, cb_pos);
+ cb_pos = NULL;
+ } else if (file_ext == &dev->iamthif_file_ext) {
+ _heci_cmpl_iamthif(dev, cb_pos);
+ }
+ }
+ }
+}
+
+
+/**
+ * heci_bh_read_handler - bottom half read routine after ISR to
+ * handle the read processing.
+ *
+ * @cmpl_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @slots: slots to read.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+ struct heci_msg_hdr *heci_hdr;
+ int ret = 0;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (!dev->rd_msg_hdr) {
+ dev->rd_msg_hdr = read_heci_register(dev, ME_CB_RW);
+ DBG("slots=%08x.\n", *slots);
+ (*slots)--;
+ DBG("slots=%08x.\n", *slots);
+ }
+ heci_hdr = (struct heci_msg_hdr *) &dev->rd_msg_hdr;
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+
+ if ((heci_hdr->reserved) || !(dev->rd_msg_hdr)) {
+ DBG("corrupted message header.\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+
+ if ((heci_hdr->host_addr) || (heci_hdr->me_addr)) {
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe read host"
+ " client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ if ((file_pos->host_client_id == heci_hdr->host_addr)
+ && (file_pos->me_client_id == heci_hdr->me_addr))
+ break;
+ }
+
+ if (&file_pos->link == &dev->file_list) {
+ DBG("corrupted message header\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+ }
+ if (((*slots) * sizeof(__u32)) < heci_hdr->length) {
+ DBG("we can't read the message slots=%08x.\n", *slots);
+ /* we can't read the message */
+ ret = -ERANGE;
+ goto end;
+ }
+
+ /* decide where to read the message too */
+ if (!heci_hdr->host_addr) {
+ DBG("call heci_bh_read_bus_message.\n");
+ heci_bh_read_bus_message(dev, heci_hdr);
+ DBG("end heci_bh_read_bus_message.\n");
+ } else if ((heci_hdr->host_addr == dev->iamthif_file_ext.host_client_id)
+ && (HECI_FILE_CONNECTED == dev->iamthif_file_ext.state)
+ && (dev->iamthif_state == HECI_IAMTHIF_READING)) {
+ DBG("call heci_bh_read_iamthif_message.\n");
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ ret = heci_bh_read_pthi_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ } else {
+ DBG("call heci_bh_read_client_message.\n");
+ ret = heci_bh_read_client_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ }
+
+ /* reset the number of slots and header */
+ *slots = count_full_read_slots(dev);
+ dev->rd_msg_hdr = 0;
+
+ if (*slots == -ESLOTS_OVERFLOW) {
+ /* overflow - reset */
+ DBG("reseting due to slots overflow.\n");
+ /* set the event since message has been read */
+ ret = -ERANGE;
+ goto end;
+ }
+end:
+ return ret;
+}
+
+
+/**
+ * heci_bh_read_bus_message - bottom half read routine after ISR to
+ * handle the read bus message cmd processing.
+ *
+ * @dev: Device object for our driver
+ * @heci_hdr: header of bus message
+ */
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_bus_message *heci_msg;
+ struct hbm_host_version_response *version_res;
+ struct hbm_client_connect_response *connect_res;
+ struct hbm_client_connect_response *disconnect_res;
+ struct hbm_flow_control *flow_control;
+ struct hbm_props_response *props_res;
+ struct hbm_host_enum_response *enum_res;
+ struct hbm_client_disconnect_request *disconnect_req;
+ struct hbm_host_stop_request *h_stop_req;
+ int i;
+ unsigned char *buffer;
+
+ /* read the message to our buffer */
+ buffer = (unsigned char *) dev->rd_msg_buf;
+ BUG_ON(heci_hdr->length >= sizeof(dev->rd_msg_buf));
+ heci_read_slots(dev, buffer, heci_hdr->length);
+ heci_msg = (struct heci_bus_message *) buffer;
+
+ switch (*(__u8 *) heci_msg) {
+ case HOST_START_RES_CMD:
+ version_res = (struct hbm_host_version_response *) heci_msg;
+ if (version_res->host_version_supported) {
+ dev->version.major_version = HBM_MAJOR_VERSION;
+ dev->version.minor_version = HBM_MINOR_VERSION;
+ } else {
+ dev->version = version_res->me_max_version;
+ }
+ dev->recvd_msg = 1;
+ DBG("host start response message received.\n");
+ break;
+
+ case CLIENT_CONNECT_RES_CMD:
+ connect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_connect_response(dev, connect_res);
+ DBG("client connect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case CLIENT_DISCONNECT_RES_CMD:
+ disconnect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_disconnect_response(dev, disconnect_res);
+ DBG("client disconnect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case HECI_FLOW_CONTROL_CMD:
+ flow_control = (struct hbm_flow_control *) heci_msg;
+ heci_client_flow_control_response(dev, flow_control);
+ DBG("client flow control response message received.\n");
+ break;
+
+ case HOST_CLIENT_PROPERTEIS_RES_CMD:
+ props_res = (struct hbm_props_response *) heci_msg;
+ if (props_res->status != 0) {
+ BUG();
+ break;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ props_res->address) {
+ dev->me_clients[i].props =
+ props_res->client_properties;
+ break;
+ }
+
+ }
+ dev->recvd_msg = 1;
+ break;
+
+ case HOST_ENUM_RES_CMD:
+ enum_res = (struct hbm_host_enum_response *) heci_msg;
+ memcpy(dev->heci_me_clients, enum_res->valid_addresses, 32);
+ dev->recvd_msg = 1;
+ break;
+
+ case HOST_STOP_RES_CMD:
+ dev->heci_state = HECI_DISABLED;
+ DBG("reseting because of FW stop response.\n");
+ heci_reset(dev, 1);
+ break;
+
+ case CLIENT_DISCONNECT_REQ_CMD:
+ /* search for client */
+ disconnect_req =
+ (struct hbm_client_disconnect_request *) heci_msg;
+ heci_client_disconnect_request(dev, disconnect_req);
+ break;
+
+ case ME_STOP_REQ_CMD:
+ /* prepare stop request */
+ heci_hdr = (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ h_stop_req =
+ (struct hbm_host_stop_request *) &dev->ext_msg_buf[1];
+ memset(h_stop_req, 0, sizeof(struct hbm_host_stop_request));
+ h_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ h_stop_req->reason = DRIVER_STOP_REQUEST;
+ h_stop_req->reserved[0] = 0;
+ h_stop_req->reserved[1] = 0;
+ dev->extra_write_index = 2;
+ break;
+
+ default:
+ BUG();
+ break;
+
+ }
+}
+
+/**
+ * heci_bh_read_pthi_message - bottom half read routine after ISR to
+ * handle the read pthi message data processing.
+ *
+ * @complete_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @heci_hdr: header of pthi message
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb;
+ unsigned char *buffer;
+
+ BUG_ON(heci_hdr->me_addr != dev->iamthif_file_ext.me_client_id);
+ BUG_ON(dev->iamthif_state != HECI_IAMTHIF_READING);
+
+ buffer = (unsigned char *) (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index);
+ BUG_ON(sizeof(dev->iamthif_msg_buf) <
+ (dev->iamthif_msg_buf_index + heci_hdr->length));
+
+ heci_read_slots(dev, buffer, heci_hdr->length);
+
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+
+ if (!(heci_hdr->msg_complete))
+ return 0;
+
+ DBG("pthi_message_buffer_index=%d\n", heci_hdr->length);
+ DBG("completed pthi read.\n ");
+ if (!dev->iamthif_current_cb)
+ return -ENODEV;
+
+ priv_cb = dev->iamthif_current_cb;
+ dev->iamthif_current_cb = NULL;
+
+ file_ext = (struct heci_file_private *)priv_cb->file_private;
+ if (!file_ext)
+ return -ENODEV;
+
+ dev->iamthif_stall_timer = 0;
+ priv_cb->information = dev->iamthif_msg_buf_index;
+ priv_cb->read_time = get_seconds();
+ if ((dev->iamthif_ioctl) && (file_ext == &dev->iamthif_file_ext)) {
+ /* found the iamthif cb */
+ DBG("complete the pthi read cb.\n ");
+ if (&dev->iamthif_file_ext) {
+ DBG("add the pthi read cb to complete.\n ");
+ list_add_tail(&priv_cb->cb_list,
+ &complete_list->heci_cb.cb_list);
+ }
+ }
+ return 0;
+}
+
+/**
+ * _heci_bh_state_ok - check if heci header matches file private data
+ *
+ * @file_ext: private data of the file object
+ * @heci_hdr: header of heci client message
+ *
+ * returns !=0 if matches, 0 if no match.
+ */
+static int _heci_bh_state_ok(struct heci_file_private *file_ext,
+ struct heci_msg_hdr *heci_hdr)
+{
+ return ((file_ext->host_client_id == heci_hdr->host_addr)
+ && (file_ext->me_client_id == heci_hdr->me_addr)
+ && (file_ext->state == HECI_FILE_CONNECTED)
+ && (HECI_READ_COMPLETE != file_ext->reading_state));
+}
+
+/**
+ * heci_bh_read_client_message - bottom half read routine after ISR to
+ * handle the read heci client message data processing.
+ *
+ * @complete_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @heci_hdr: header of heci client message
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ unsigned char *buffer = NULL;
+
+ DBG("start client msg\n");
+ if (!((dev->read_list.status == 0) &&
+ !list_empty(&dev->read_list.heci_cb.cb_list)))
+ goto quit;
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if ((file_ext != NULL) &&
+ (_heci_bh_state_ok(file_ext, heci_hdr))) {
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_READING;
+ buffer = (unsigned char *)
+ (priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information);
+ BUG_ON(priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information);
+
+ if (priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information) {
+ DBG("message overflow.\n");
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENOMEM;
+ }
+ if (buffer) {
+ heci_read_slots(dev, buffer,
+ heci_hdr->length);
+ }
+ priv_cb_pos->information += heci_hdr->length;
+ if (heci_hdr->msg_complete) {
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ DBG("completed read host client = %d,"
+ "ME client = %d, "
+ "data length = %lu\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id,
+ priv_cb_pos->information);
+
+ *(priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information) = '\0';
+ DBG("priv_cb_pos->res_buffer - %s\n",
+ priv_cb_pos->response_buffer.data);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &complete_list->heci_cb.cb_list);
+ } else {
+ spin_unlock(&file_ext->read_io_lock);
+ }
+
+ break;
+ }
+
+ }
+
+quit:
+ DBG("message read\n");
+ if (!buffer) {
+ heci_read_slots(dev, (unsigned char *) dev->rd_msg_buf,
+ heci_hdr->length);
+ DBG("discarding message, header=%08x.\n",
+ *(__u32 *) dev->rd_msg_buf);
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_iamthif_read - prepare to read iamthif data.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_iamthif_read(struct iamt_heci_device *dev, __s32 *slots)
+{
+
+ if (((*slots) * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr)
+ + sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, &dev->iamthif_file_ext)) {
+ DBG("iamthif flow control failed\n");
+ } else {
+ DBG("iamthif flow control success\n");
+ dev->iamthif_state = HECI_IAMTHIF_READING;
+ dev->iamthif_flow_control_pending = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_stall_timer = IAMTHIF_STALL_TIMER;
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+ }
+ return 0;
+ } else {
+ return -ECOMPLETE_MESSAGE;
+ }
+}
+
+/**
+ * _heci_bh_close - process close related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_close(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request) + 3) / 4;
+
+ if (!heci_disconnect(dev, file_ext)) {
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_hb_close - process read related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_read(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+
+/**
+ * _heci_bh_ioctl - process ioctl related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_ioctl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request))) {
+ file_ext->state = HECI_FILE_CONNECTING;
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request) + 3) / 4;
+ if (!heci_connect(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl - process completed and no-iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ (priv_cb_pos->request_buffer.size -
+ priv_cb_pos->information))) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = ((priv_cb_pos->request_buffer.size) -
+ (priv_cb_pos->information));
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ "heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n",
+ heci_hdr->length);
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ file_ext->status = 0;
+ priv_cb_pos->information += heci_hdr->length;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ (*slots) -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ priv_cb_pos->information += heci_hdr->length;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ " heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl_iamthif - process completed iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl_iamthif(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ dev->iamthif_msg_buf_size -
+ dev->iamthif_msg_buf_index)) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = dev->iamthif_msg_buf_size -
+ dev->iamthif_msg_buf_index;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index),
+ heci_hdr->length)) {
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+ priv_cb_pos->information = dev->iamthif_msg_buf_index;
+ file_ext->status = 0;
+ dev->iamthif_state = HECI_IAMTHIF_FLOW_CONTROL;
+ dev->iamthif_flow_control_pending = 1;
+ /* save iamthif cb sent to pthi client */
+ dev->iamthif_current_cb = priv_cb_pos;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ } else {
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * heci_bh_write_handler - bottom half write routine after
+ * ISR to handle the write processing.
+ *
+ * @cmpl_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @slots: slots to write.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_write_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ struct io_heci_list *list;
+ int ret;
+
+ if (!host_buffer_is_empty(dev)) {
+ DBG("host buffer is not empty.\n");
+ return 0;
+ }
+ dev->write_hang = -1;
+ *slots = count_empty_write_slots(dev);
+ /* complete all waiting for write CB */
+ DBG("complete all waiting for write cb.\n");
+
+ list = &dev->write_waiting_list;
+ if ((list->status == 0)
+ && !list_empty(&list->heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &list->heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext != NULL) {
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ if ((HECI_WRITING == file_ext->writing_state) &&
+ (priv_cb_pos->major_file_operations ==
+ HECI_WRITING) &&
+ (file_ext != &dev->iamthif_file_ext)) {
+ DBG("HECI WRITE COMPLETE\n");
+ file_ext->writing_state =
+ HECI_WRITE_COMPLETE;
+ list_add_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ }
+ if (file_ext == &dev->iamthif_file_ext) {
+ DBG("check iamthif flow control.\n");
+ if (dev->iamthif_flow_control_pending) {
+ ret = _heci_bh_iamthif_read(dev,
+ slots);
+ if (ret != 0)
+ return ret;
+ }
+ }
+ }
+
+ }
+ }
+
+ if ((dev->stop) && (!dev->wd_pending)) {
+ dev->wd_stoped = 1;
+ wake_up_interruptible(&dev->wait_stop_wd);
+ return 0;
+ }
+
+ if (dev->extra_write_index != 0) {
+ DBG("extra_write_index =%d.\n", dev->extra_write_index);
+ heci_write_message(dev,
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0],
+ (unsigned char *) &dev->ext_msg_buf[1],
+ (dev->extra_write_index - 1) * sizeof(__u32));
+ *slots -= dev->extra_write_index;
+ dev->extra_write_index = 0;
+ }
+ if (dev->heci_state == HECI_ENABLED) {
+ if ((dev->wd_pending)
+ && flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ if (!heci_send_wd(dev))
+ DBG("wd send failed.\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+
+ if (dev->wd_timeout != 0) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_START_WD_DATA_SIZE + 3) / 4;
+ dev->wd_due_counter = 2;
+ } else {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_WD_PARAMS_SIZE + 3) / 4;
+ dev->wd_due_counter = 0;
+ }
+
+ }
+ }
+ if (dev->stop)
+ return ~ENODEV;
+
+ /* complete control write list CB */
+ if (dev->ctrl_wr_list.status == 0) {
+ /* complete control write list CB */
+ DBG("complete control write list cb.\n");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_wr_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ }
+ switch (priv_cb_pos->major_file_operations) {
+ case HECI_CLOSE:
+ /* send disconnect message */
+ ret = _heci_bh_close(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_READ:
+ /* send flow control message */
+ ret = _heci_bh_read(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_IOCTL:
+ /* connect message */
+ if (!other_client_is_connecting(dev, file_ext))
+ continue;
+ ret = _heci_bh_ioctl(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+
+ default:
+ BUG();
+ }
+
+ }
+ }
+ /* complete write list CB */
+ if ((dev->write_list.status == 0)
+ && !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ DBG("complete write list cb.\n");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (file_ext != NULL) {
+ if (file_ext != &dev->iamthif_file_ext) {
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control"
+ " credentials for client"
+ " %d, not sending.\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl(dev, slots,
+ priv_cb_pos,
+ file_ext,
+ cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ } else if (file_ext == &dev->iamthif_file_ext) {
+ /* IAMTHIF IOCTL */
+ DBG("complete pthi write cb.\n");
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control"
+ " credentials for pthi"
+ " client %d.\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl_iamthif(dev, slots,
+ priv_cb_pos,
+ file_ext,
+ cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ }
+ }
+
+ }
+ }
+ return 0;
+}
+
+
+/**
+ * is_treat_specially_client - check if the message belong
+ * to the file private data.
+ *
+ * @file_ext: private data of the file object
+ * @rs: connect response bus message
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int is_treat_specially_client(struct heci_file_private *file_ext,
+ struct hbm_client_connect_response *rs)
+{
+ int ret = 0;
+
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+ if (rs->status == 0) {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_CONNECTED;
+ file_ext->status = 0;
+ } else {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_DISCONNECTED;
+ file_ext->status = -ENODEV;
+ }
+ ret = 1;
+ }
+ DBG("client state = %d.\n", file_ext->state);
+ return ret;
+}
+
+/**
+ * heci_client_connect_response - connect response bh routine
+ *
+ * @dev: Device object for our driver
+ * @rs: connect response bus message
+ */
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ /* if WD or iamthif client treat specially */
+
+ if ((is_treat_specially_client(&(dev->wd_file_ext), rs)) ||
+ (is_treat_specially_client(&(dev->iamthif_file_ext), rs)))
+ return;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+ if (HECI_IOCTL == priv_cb_pos->major_file_operations) {
+ if (is_treat_specially_client(file_ext, rs)) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+ }
+}
+
+/**
+ * heci_client_disconnect_response - disconnect response bh routine
+ *
+ * @dev: Device object for our driver
+ * @rs: disconnect response bus message
+ */
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+
+ DBG("list_for_each_entry_safe in ctrl_rd_list.\n");
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+
+ list_del(&priv_cb_pos->cb_list);
+ if (rs->status == 0) {
+ file_ext->state =
+ HECI_FILE_DISCONNECTED;
+ }
+
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_flow_addr - tell they have same address.
+ *
+ * @file: private data of the file object.
+ * @flow: flow control.
+ *
+ * returns !=0, same; 0,not.
+ */
+static int same_flow_addr(struct heci_file_private *file,
+ struct hbm_flow_control *flow)
+{
+ return ((file->host_client_id == flow->host_addr)
+ && (file->me_client_id == flow->me_addr));
+}
+
+/**
+ * add_single_flow_creds - add single buffer credentials.
+ *
+ * @file: private data ot the file object.
+ * @flow: flow control.
+ */
+static void add_single_flow_creds(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow)
+{
+ struct heci_me_client *client;
+ int i;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ client = &dev->me_clients[i];
+ if ((client != NULL) &&
+ (flow->me_addr == client->client_id)) {
+ if (client->props.single_recv_buf != 0) {
+ client->flow_ctrl_creds++;
+ DBG("recv flow ctrl msg ME %d (single).\n",
+ flow->me_addr);
+ DBG("flow control credentials=%d.\n",
+ client->flow_ctrl_creds);
+ } else {
+ BUG(); /* error in flow control */
+ }
+ }
+ }
+}
+
+/**
+ * heci_client_flow_control_response - flow control response bh routine
+ *
+ * @dev: Device object for our driver
+ * @flow_control: flow control response bus message
+ */
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (flow_control->host_addr == 0) {
+ /* single receive buffer */
+ add_single_flow_creds(dev, flow_control);
+ } else {
+ /* normal connection */
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe in file_list\n");
+
+ DBG("file_ext of host client %d ME client %d.\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ DBG("flow ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ if (same_flow_addr(file_pos, flow_control)) {
+ DBG("recv ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ file_pos->flow_ctrl_creds++;
+ DBG("flow control credentials=%d.\n",
+ file_pos->flow_ctrl_creds);
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_disconn_addr - tell they have same address
+ *
+ * @file: private data of the file object.
+ * @disconn: disconnection request.
+ *
+ * returns !=0, same; 0,not.
+ */
+static int same_disconn_addr(struct heci_file_private *file,
+ struct hbm_client_disconnect_request *disconn)
+{
+ return ((file->host_client_id == disconn->host_addr)
+ && (file->me_client_id == disconn->me_addr));
+}
+
+/**
+ * heci_client_disconnect_request - disconnect request bh routine
+ *
+ * @dev: Device object for our driver.
+ * @disconnect_req: disconnect request bus message.
+ */
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_response *disconnect_res;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (same_disconn_addr(file_pos, disconnect_req)) {
+ DBG("disconnect request host client %d ME client %d.\n",
+ disconnect_req->host_addr,
+ disconnect_req->me_addr);
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->timer_count = 0;
+ if (file_pos == &dev->wd_file_ext) {
+ dev->wd_due_counter = 0;
+ dev->wd_pending = 0;
+ } else if (file_pos == &dev->iamthif_file_ext)
+ dev->iamthif_timer = 0;
+
+ /* prepare disconnect response */
+ heci_hdr =
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length =
+ sizeof(struct hbm_client_connect_response);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ disconnect_res =
+ (struct hbm_client_connect_response *)
+ &dev->ext_msg_buf[1];
+ disconnect_res->host_addr = file_pos->host_client_id;
+ disconnect_res->me_addr = file_pos->me_client_id;
+ *(__u8 *) (&disconnect_res->cmd) =
+ CLIENT_DISCONNECT_RES_CMD;
+ disconnect_res->status = 0;
+ dev->extra_write_index = 2;
+ break;
+ }
+ }
+}
+
+/**
+ * heci_timer - timer function.
+ *
+ * @data: pointer to the device structure
+ *
+ * NOTE: This function is called by timer interrupt work
+ */
+void heci_wd_timer(unsigned long data)
+{
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ DBG("send watchdog.\n");
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ /* Watchdog */
+ if ((dev->wd_due_counter != 0) && (dev->wd_bypass == 0)) {
+ if (--dev->wd_due_counter == 0) {
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_wd(dev)) {
+ DBG("wd send failed.\n");
+ } else {
+ flow_ctrl_reduce(dev,
+ &dev->wd_file_ext);
+ }
+
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 2;
+ else
+ dev->wd_due_counter = 0;
+
+ } else
+ dev->wd_pending = 1;
+
+ }
+ }
+ if (dev->iamthif_stall_timer != 0) {
+ if (--dev->iamthif_stall_timer == 0) {
+ DBG("reseting because of hang to PTHI.\n");
+ heci_reset(dev, 1);
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->iamthif_current_cb)
+ heci_free_cb_private(dev->iamthif_current_cb);
+
+ spin_lock_bh(&dev->device_lock);
+ dev->iamthif_file_object = NULL;
+ dev->iamthif_current_cb = NULL;
+ run_next_iamthif_cmd(dev);
+ }
+ }
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+}
diff --git a/drivers/char/heci/io_heci.c b/drivers/char/heci/io_heci.c
new file mode 100644
index 0000000..d7e0648
--- /dev/null
+++ b/drivers/char/heci/io_heci.c
@@ -0,0 +1,847 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/list.h>
+#include <linux/unistd.h>
+#include <linux/delay.h>
+
+#include "heci_data_structures.h"
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+/**
+ * heci_ioctl_get_version - the get driver version IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @*u_msg: pointer to user data struct in user space
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ struct heci_driver_version *version;
+ struct heci_message_data res_msg;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev)
+ || (!file_ext))
+ return -ENODEV;
+
+ if (k_msg.size < (sizeof(struct heci_driver_version) - 2)) {
+ DBG("user buffer less than heci_driver_version.\n");
+ return -EMSGSIZE;
+ }
+
+ res_msg.data = kmalloc(sizeof(struct heci_driver_version), GFP_KERNEL);
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_driver_version));
+ return -ENOMEM;
+ }
+
+ version = (struct heci_driver_version *) res_msg.data;
+ version->major = MAJOR_VERSION;
+ version->minor = MINOR_VERSION;
+ version->hotfix = QUICK_FIX_NUMBER;
+ version->build = VER_BUILD;
+ res_msg.size = sizeof(struct heci_driver_version);
+ if (k_msg.size < sizeof(struct heci_driver_version))
+ res_msg.size -= 2;
+
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+end:
+ kfree(res_msg.data);
+ return rets;
+}
+
+/**
+ * heci_ioctl_connect_client - the connect to fw client IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @*u_msg: pointer to user data struct in user space
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file)
+{
+ int rets = 0;
+ struct heci_message_data req_msg, res_msg;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_client *client;
+ struct heci_file_private *file_ext;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ long timeout = 15; /*15 second */
+ __u8 i;
+ int err = 0;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file))
+ return -ENODEV;
+
+ file_ext = file->private_data;
+ if (!file_ext)
+ return -ENODEV;
+
+ if (k_msg.size != sizeof(struct guid)) {
+ DBG("user buffer size is not equal to size of struct "
+ "guid(16).\n");
+ return -EMSGSIZE;
+ }
+
+ if (!k_msg.data)
+ return -EIO;
+
+ req_msg.data = kmalloc(sizeof(struct guid), GFP_KERNEL);
+ res_msg.data = kmalloc(sizeof(struct heci_client), GFP_KERNEL);
+
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_client));
+ kfree(req_msg.data);
+ return -ENOMEM;
+ }
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ (int) sizeof(struct guid));
+ kfree(res_msg.data);
+ return -ENOMEM;
+ }
+ req_msg.size = sizeof(struct guid);
+ res_msg.size = sizeof(struct heci_client);
+
+ /* copy the message to kernel space -
+ * use a pointer already copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, k_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ /* buffered ioctl cb */
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb) {
+ rets = -ENOMEM;
+ goto end;
+ }
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->response_buffer.data = res_msg.data;
+ priv_cb->response_buffer.size = res_msg.size;
+ priv_cb->request_buffer.data = req_msg.data;
+ priv_cb->request_buffer.size = req_msg.size;
+ priv_cb->major_file_operations = HECI_IOCTL;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if ((file_ext->state != HECI_FILE_INITIALIZING) &&
+ (file_ext->state != HECI_FILE_DISCONNECTED)) {
+ rets = -EBUSY;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ /* find ME client we're trying to connect to */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp((struct guid *)req_msg.data,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (dev->me_clients[i].props.fixed_address == 0) {
+ file_ext->me_client_id =
+ dev->me_clients[i].client_id;
+ file_ext->state = HECI_FILE_CONNECTING;
+ }
+ break;
+ }
+ }
+ /* if we're connecting to PTHI client so we will use the exist
+ * connection
+ */
+ if (memcmp((struct guid *)req_msg.data, &heci_pthi_guid,
+ sizeof(struct guid)) == 0) {
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ if (heci_fe_same_id(file_ext, file_pos)) {
+ DBG("remove file private data node host"
+ " client = %d, ME client = %d.\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del(&file_pos->link);
+ }
+
+ }
+ DBG("free file private data memory.\n");
+ kfree(file_ext);
+ file_ext = NULL;
+ file->private_data = &dev->iamthif_file_ext;
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length =
+ dev->me_clients[i].props.max_msg_length;
+ client->protocol_version =
+ dev->me_clients[i].props.protocol_version;
+ rets = dev->iamthif_file_ext.status;
+ spin_unlock_bh(&dev->device_lock);
+
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ }
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state != HECI_FILE_CONNECTING) {
+ rets = -ENODEV;
+ spin_unlock(&file_ext->file_lock);
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ spin_unlock(&file_ext->file_lock);
+ /* prepare the output buffer */
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length = dev->me_clients[i].props.max_msg_length;
+ client->protocol_version = dev->me_clients[i].props.protocol_version;
+ if (dev->host_buffer_is_empty
+ && !other_client_is_connecting(dev, file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_connect(dev, file_ext)) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ } else {
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ priv_cb->file_private = file_ext;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.
+ cb_list);
+ }
+
+
+ } else {
+ priv_cb->file_private = file_ext;
+ DBG("add connect cb to control write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+
+ if (HECI_FILE_CONNECTED == file_ext->state) {
+ DBG("successfully connected to FW client.\n");
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ } else {
+ DBG("failed to connect to FW client.file_ext->state = %d.\n",
+ file_ext->state);
+ if (!err) {
+ DBG("wait_event_interruptible_timeout failed on client"
+ " connect message fw response message.\n");
+ }
+ rets = -EFAULT;
+ goto remove_list;
+ }
+
+remove_list:
+ if (priv_cb) {
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_list(&dev->ctrl_rd_list, file_ext);
+ heci_flush_list(&dev->ctrl_wr_list, file_ext);
+ spin_unlock_bh(&dev->device_lock);
+ }
+end:
+ DBG("free connect cb memory.");
+ kfree(req_msg.data);
+ kfree(res_msg.data);
+ kfree(priv_cb);
+ return rets;
+}
+
+/**
+ * heci_ioctl_wd - the wd IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ struct heci_message_data req_msg; /*in kernel on the stack */
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size != HECI_WATCHDOG_DATA_SIZE) {
+ DBG("user buffer has invalid size.\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+
+ req_msg.data = kmalloc(HECI_WATCHDOG_DATA_SIZE, GFP_KERNEL);
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ HECI_WATCHDOG_DATA_SIZE);
+ return -ENOMEM;
+ }
+ req_msg.size = HECI_WATCHDOG_DATA_SIZE;
+
+ /* copy the message to kernel space - use a pointer already
+ * copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, req_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if (!dev->asf_mode) {
+ rets = -EIO;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ memcpy(&dev->wd_data[HECI_WD_PARAMS_SIZE], req_msg.data,
+ HECI_WATCHDOG_DATA_SIZE);
+
+ dev->wd_timeout = (req_msg.data[1] << 8) + req_msg.data[0];
+ dev->wd_pending = 0;
+ dev->wd_due_counter = 1; /* next timer */
+ if (dev->wd_timeout == 0) {
+ memcpy(dev->wd_data, heci_stop_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ } else {
+ memcpy(dev->wd_data, heci_start_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ mod_timer(&dev->wd_timer, jiffies);
+ }
+ spin_unlock_bh(&dev->device_lock);
+end:
+ kfree(req_msg.data);
+ return rets;
+}
+
+
+/**
+ * heci_ioctl_bypass_wd - the bypass_wd IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_bypass_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ __u8 flag = 0;
+ int rets = 0;
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size < 1) {
+ DBG("user buffer less than HECI_WATCHDOG_DATA_SIZE.\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+ if (copy_from_user(&flag, k_msg.data, 1)) {
+ rets = -EFAULT;
+ goto end;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ flag = flag ? (1) : (0);
+ dev->wd_bypass = flag;
+ spin_unlock_bh(&dev->device_lock);
+end:
+ return rets;
+}
+
+/**
+ * find_pthi_read_list_entry - finds a PTHIlist entry for current file
+ *
+ * @dev: Device object for our driver
+ * @file: pointer to file object
+ *
+ * returns returned a list entry on success, NULL on failure.
+ */
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct file *file)
+{
+ struct heci_file_private *file_ext_temp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if ((dev->pthi_read_complete_list.status == 0) &&
+ !list_empty(&dev->pthi_read_complete_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_read_complete_list.heci_cb.cb_list, cb_list) {
+ file_ext_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if ((file_ext_temp != NULL) &&
+ (file_ext_temp == &dev->iamthif_file_ext) &&
+ (priv_cb_pos->file_object == file))
+ return priv_cb_pos;
+ }
+ }
+ return NULL;
+}
+
+/**
+ * pthi_read - read data from pthi client
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @file: pointer to file object
+ * @*ubuf: pointer to user data in user space
+ * @length: data length to read
+ * @offset: data read offset
+ *
+ * returns
+ * returned data length on success,
+ * zero if no data to read,
+ * negative on failure.
+ */
+int pthi_read(struct iamt_heci_device *dev, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset)
+{
+ int rets = 0;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_file_private *file_ext = file->private_data;
+ __u8 i;
+ unsigned long currtime = get_seconds();
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ if ((file_ext == NULL) || (file_ext != &dev->iamthif_file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->iamthif_file_ext.me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients)
+ || (dev->me_clients[i].client_id !=
+ dev->iamthif_file_ext.me_client_id)) {
+ DBG("PTHI client not found.\n");
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ priv_cb = find_pthi_read_list_entry(dev, file);
+ if (!priv_cb) {
+ spin_unlock_bh(&dev->device_lock);
+ return 0; /* No more data to read */
+ } else {
+ if (priv_cb &&
+ (currtime - priv_cb->read_time > IAMTHIF_READ_TIMER)) {
+ /* 15 sec for the message has expired */
+ list_del(&priv_cb->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ETIMEDOUT;
+ goto free;
+ }
+ /* if the whole message will fit remove it from the list */
+ if ((priv_cb->information >= *offset) &&
+ (length >= (priv_cb->information - *offset)))
+ list_del(&priv_cb->cb_list);
+ else if ((priv_cb->information > 0) &&
+ (priv_cb->information <= *offset)) {
+ /* end of the message has been reached */
+ list_del(&priv_cb->cb_list);
+ rets = 0;
+ spin_unlock_bh(&dev->device_lock);
+ goto free;
+ }
+ /* else means that not full buffer will be read and do not
+ * remove message from deletion list
+ */
+ }
+ DBG("pthi priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("pthi priv_cb->information - %lu\n",
+ priv_cb->information);
+ spin_unlock_bh(&dev->device_lock);
+
+ /* length is being turncated to PAGE_SIZE, however,
+ * the information may be longer */
+ length = length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset);
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length))
+ rets = -EFAULT;
+ else {
+ rets = length;
+ if ((*offset + length) < priv_cb->information) {
+ *offset += length;
+ goto out;
+ }
+ }
+free:
+ DBG("free pthi cb memory.\n");
+ *offset = 0;
+ heci_free_cb_private(priv_cb);
+out:
+ return rets;
+}
+
+/**
+ * heci_start_read - the start read client message function.
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_start_read(struct iamt_heci_device *dev, int if_num,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ __u8 i;
+ struct heci_cb_private *priv_cb = NULL;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext)) {
+ DBG("received wrong function input param.\n");
+ return -ENODEV;
+ }
+ if (file_ext->state != HECI_FILE_CONNECTED)
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ DBG("check if read is pending.\n");
+ if ((file_ext->read_pending) || (file_ext->read_cb != NULL)) {
+ DBG("read is pending.\n");
+ return -EBUSY;
+ }
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ DBG("allocation call back success\n"
+ "host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id)
+ break;
+
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if (i == dev->num_heci_me_clients) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+
+ priv_cb->response_buffer.size = dev->me_clients[i].props.max_msg_length;
+ spin_unlock_bh(&dev->device_lock);
+ priv_cb->response_buffer.data =
+ kmalloc(priv_cb->response_buffer.size, GFP_KERNEL);
+ if (!priv_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ DBG("allocation call back data success.\n");
+ priv_cb->major_file_operations = HECI_READ;
+ /* make sure information is zero before we start */
+ priv_cb->information = 0;
+ priv_cb->file_private = (void *) file_ext;
+ file_ext->read_cb = priv_cb;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ rets = -ENODEV;
+ goto unlock;
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+unlock:
+ spin_unlock_bh(&dev->device_lock);
+fail:
+ heci_free_cb_private(priv_cb);
+ return rets;
+}
+
+/**
+ * pthi_write - write iamthif data to pthi client
+ *
+ * @dev: Device object for our driver
+ * @priv_cb: heci call back struct
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int pthi_write(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb)
+{
+ int rets = 0;
+ struct heci_msg_hdr heci_hdr;
+
+ if ((!dev) || (!priv_cb))
+ return -ENODEV;
+
+ DBG("write data to pthi client.\n");
+
+ dev->iamthif_state = HECI_IAMTHIF_WRITING;
+ dev->iamthif_current_cb = priv_cb;
+ dev->iamthif_file_object = priv_cb->file_object;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_msg_buf_size = priv_cb->request_buffer.size;
+ memcpy(dev->iamthif_msg_buf, priv_cb->request_buffer.data,
+ priv_cb->request_buffer.size);
+
+ if (flow_ctrl_creds(dev, &dev->iamthif_file_ext) &&
+ dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (priv_cb->request_buffer.size >
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr)) {
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = priv_cb->request_buffer.size;
+ heci_hdr.msg_complete = 1;
+ }
+
+ heci_hdr.host_addr = dev->iamthif_file_ext.host_client_id;
+ heci_hdr.me_addr = dev->iamthif_file_ext.me_client_id;
+ heci_hdr.reserved = 0;
+ dev->iamthif_msg_buf_index += heci_hdr.length;
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *)(dev->iamthif_msg_buf),
+ heci_hdr.length))
+ return -ENODEV;
+
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, &dev->iamthif_file_ext);
+ dev->iamthif_flow_control_pending = 1;
+ dev->iamthif_state = HECI_IAMTHIF_FLOW_CONTROL;
+ DBG("add pthi cb to write waiting list\n");
+ dev->iamthif_current_cb = priv_cb;
+ dev->iamthif_file_object = priv_cb->file_object;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ DBG("message does not complete, "
+ "so add pthi cb to write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ } else {
+ if (!(dev->host_buffer_is_empty))
+ DBG("host buffer is not empty");
+
+ DBG("No flow control credentials, "
+ "so add iamthif cb to write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return rets;
+}
+
+/**
+ * iamthif_ioctl_send_msg - send cmd data to pthi client
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+void run_next_iamthif_cmd(struct iamt_heci_device *dev)
+{
+ struct heci_file_private *file_ext_tmp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int status = 0;
+
+ if (!dev)
+ return;
+
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+ dev->iamthif_file_object = NULL;
+
+ if (dev->pthi_cmd_list.status == 0 &&
+ !list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)) {
+ DBG("complete pthi cmd_list cb.\n");
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_cmd_list.heci_cb.cb_list, cb_list) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext_tmp != NULL) &&
+ (file_ext_tmp == &dev->iamthif_file_ext)) {
+ status = pthi_write(dev, priv_cb_pos);
+ if (status != 0) {
+ DBG("pthi write failed status = %d\n",
+ status);
+ return;
+ }
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * heci_free_cb_private - free heci_cb_private related memory
+ *
+ * @priv_cb: heci callback struct
+ */
+void heci_free_cb_private(struct heci_cb_private *priv_cb)
+{
+ if (priv_cb == NULL)
+ return;
+
+ kfree(priv_cb->request_buffer.data);
+ kfree(priv_cb->response_buffer.data);
+ kfree(priv_cb);
+}
+
^ permalink raw reply related [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-07-17 18:27 Marcin Obara
` (2 preceding siblings ...)
2008-07-18 9:27 ` Andi Kleen
@ 2008-08-06 16:56 ` Pavel Machek
3 siblings, 0 replies; 42+ messages in thread
From: Pavel Machek @ 2008-08-06 16:56 UTC (permalink / raw)
To: Marcin Obara; +Cc: linux-kernel
Hi!
> Fixed more issues raised on lkml after previous submission.
>
>
> The Intel Management Engine Interface (aka HECI: Host Embedded
> Controller Interface ) enables communication between the host OS and
> the Management Engine firmware. MEI is bi-directional, and either the
> host or Intel AMT firmware can initiate transactions.
>
> The core hardware architecture of Intel Active Management Technology
> (Intel AMT) is resident in firmware. The micro-controller within the
> chipset's graphics and memory controller (GMCH) hub houses the
> Management Engine (ME) firmware, which implements various services
> on behalf of management applications.
>
> Some of the ME subsystems that can be access via MEI driver:
>
> - Intel(R) Quiet System Technology (QST) is implemented as a firmware
> subsystem that runs in the ME. Programs that wish to expose the
> health monitoring and fan speed control capabilities of Intel(R) QST
> will need to use the MEI driver to communicate with the ME sub-system.
> - ASF is the "Alert Standard Format" which is an DMTF manageability
> standard. It is implemented in the PC's hardware and firmware, and is
> managed from a remote console.
Cool, so this should hook into sensors subsystem, right?
Also it uses __x32-style types when x32 would be enough.
> + heci_check_asf_mode(dev);
> + /*heci initialization wd */
That is not exactly helpful comment... Decrypt? Space after /*?
> + DBG("call wait_event_interruptible_timeout for response message.\n");
> + /* wait for response */
Home-brewn DBG is un-nice.
> +static int host_enum_clients_message(struct iamt_heci_device *dev)
> +{
> + long timeout = 5; /*5 second */
> + struct heci_msg_hdr *heci_hdr;
> + struct hbm_host_enum_request *host_enum_req;
> + int err = 0;
> + __u8 i, j;
int is probably better here.
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
^ permalink raw reply [flat|nested] 42+ messages in thread
* [PATCH] Intel Management Engine Interface
2008-07-18 20:30 ` Marcin Obara
@ 2008-07-23 18:00 ` Marcin Obara
2008-08-11 19:23 ` Marcin Obara
0 siblings, 1 reply; 42+ messages in thread
From: Marcin Obara @ 2008-07-23 18:00 UTC (permalink / raw)
To: linux-kernel
Increased number of device_create() parameters.
Result of latest API changes made by Greg Kroah-Hartman (21 Jul 2008).
The Intel Management Engine Interface (aka HECI: Host Embedded
Controller Interface ) enables communication between the host OS and
the Management Engine firmware. MEI is bi-directional, and either the
host or Intel AMT firmware can initiate transactions.
The core hardware architecture of Intel Active Management Technology
(Intel AMT) is resident in firmware. The micro-controller within the
chipset's graphics and memory controller (GMCH) hub houses the
Management Engine (ME) firmware, which implements various services
on behalf of management applications.
Some of the ME subsystems that can be access via MEI driver:
- Intel(R) Quiet System Technology (QST) is implemented as a firmware
subsystem that runs in the ME. Programs that wish to expose the
health monitoring and fan speed control capabilities of Intel(R) QST
will need to use the MEI driver to communicate with the ME sub-system.
- ASF is the "Alert Standard Format" which is an DMTF manageability
standard. It is implemented in the PC's hardware and firmware, and is
managed from a remote console.
Most recent Intel desktop chipsets have one or more of the above ME
services. The MEI driver will make it possible to support the above
features on Linux and provides applications access to the ME and it's
features.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Signed-off-by: Marcin Obara <marcin.obara@intel.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 0652ab3..708c8be 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2203,6 +2203,15 @@ L: e1000-devel@lists.sourceforge.net
W: http://e1000.sourceforge.net/
S: Supported
+INTEL MANAGEABILITY ENGINE INTERFACE (HECI)
+P: Anas Nashif
+M: anas.nashif@intel.com
+P: Marcin Obara
+M: marcin.obara@intel.com
+W: http://www.openamt.org/
+L: openamt-devel@lists.sourceforge.net
+S: Supported
+
INTEL PRO/WIRELESS 2100 NETWORK CONNECTION SUPPORT
P: Zhu Yi
M: yi.zhu@intel.com
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index e0bbbfb..d59c084 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -1093,6 +1093,7 @@ config DEVPORT
default y
source "drivers/s390/char/Kconfig"
+source "drivers/char/heci/Kconfig"
endmenu
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index dc5a327..d8f0d3f 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -107,6 +107,7 @@ obj-$(CONFIG_IPMI_HANDLER) += ipmi/
obj-$(CONFIG_HANGCHECK_TIMER) += hangcheck-timer.o
obj-$(CONFIG_TCG_TPM) += tpm/
+obj-$(CONFIG_INTEL_MEI) += heci/
obj-$(CONFIG_PS3_FLASH) += ps3flash.o
diff --git a/drivers/char/heci/Kconfig b/drivers/char/heci/Kconfig
new file mode 100644
index 0000000..99b7d05
--- /dev/null
+++ b/drivers/char/heci/Kconfig
@@ -0,0 +1,12 @@
+#
+# HECI device configuration
+#
+
+config INTEL_MEI
+ tristate "Intel Management Engine Interface (MEI) Support (EXPERIMENTAL)"
+ depends on EXPERIMENTAL
+ ---help---
+ The Intel Management Engine Interface (Intel MEI) driver allows
+ applications to access the Active Management Technology
+ firmware and other Management Engine sub-systems.
+
diff --git a/drivers/char/heci/Makefile b/drivers/char/heci/Makefile
new file mode 100644
index 0000000..a2d7182
--- /dev/null
+++ b/drivers/char/heci/Makefile
@@ -0,0 +1,7 @@
+#
+## Makefile for the Intel MEI driver (heci)
+#
+
+obj-$(CONFIG_INTEL_MEI) += heci.o
+
+heci-objs := heci_init.o heci_interface.o heci_main.o interrupt.o io_heci.o
diff --git a/drivers/char/heci/heci.h b/drivers/char/heci/heci.h
new file mode 100644
index 0000000..9b279f3
--- /dev/null
+++ b/drivers/char/heci/heci.h
@@ -0,0 +1,176 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_H_
+#define _HECI_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+extern const struct guid heci_pthi_guid;
+extern const struct guid heci_wd_guid;
+extern const __u8 heci_start_wd_params[];
+extern const __u8 heci_stop_wd_params[];
+extern const __u8 heci_wd_state_independence_msg[3][4];
+
+/*
+ * heci device ID
+ */
+#define HECI_DEV_ID_82946GZ 0x2974 /* 82946GZ/GL */
+#define HECI_DEV_ID_82G35 0x2984 /* 82G35 Express */
+#define HECI_DEV_ID_82Q965 0x2994 /* 82Q963/Q965 */
+#define HECI_DEV_ID_82G965 0x29A4 /* 82P965/G965 */
+
+#define HECI_DEV_ID_82GM965 0x2A04 /* Mobile PM965/GM965 */
+#define HECI_DEV_ID_82GME965 0x2A14 /* Mobile GME965/GLE960 */
+
+#define HECI_DEV_ID_ICH9_82Q35 0x29B4 /* 82Q35 Express */
+#define HECI_DEV_ID_ICH9_82G33 0x29C4 /* 82G33/G31/P35/P31 Express */
+#define HECI_DEV_ID_ICH9_82Q33 0x29D4 /* 82Q33 Express */
+#define HECI_DEV_ID_ICH9_82X38 0x29E4 /* 82X38/X48 Express */
+#define HECI_DEV_ID_ICH9_3200 0x29F4 /* 3200/3210 Server */
+
+#define HECI_DEV_ID_ICH9_6 0x28B4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_7 0x28C4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_8 0x28D4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_9 0x28E4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_10 0x28F4 /* Bearlake */
+
+#define HECI_DEV_ID_ICH9M_1 0x2A44 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_2 0x2A54 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_3 0x2A64 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_4 0x2A74 /* Cantiga */
+
+#define HECI_DEV_ID_ICH10_1 0x2E04 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_2 0x2E14 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_3 0x2E24 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_4 0x2E34 /* Eaglelake */
+
+/*
+ * heci init function prototypes
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev);
+void heci_reset(struct iamt_heci_device *dev, int interrupts);
+int heci_hw_init(struct iamt_heci_device *dev);
+int heci_task_initialize_clients(void *data);
+int heci_initialize_clients(struct iamt_heci_device *dev);
+struct heci_file_private *heci_alloc_file_private(struct file *file);
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev);
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext);
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id);
+
+/*
+ * interrupt function prototype
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id);
+
+void heci_wd_timer(unsigned long data);
+
+/*
+ * input output function prototype
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file);
+
+int heci_ioctl_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_bypass_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_start_read(struct iamt_heci_device *dev, int if_num,
+ struct heci_file_private *file_ext);
+
+int pthi_write(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb);
+
+int pthi_read(struct iamt_heci_device *dev, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset);
+
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct file *file);
+
+void run_next_iamthif_cmd(struct iamt_heci_device *dev);
+
+void heci_free_cb_private(struct heci_cb_private *priv_cb);
+
+/**
+ * heci_fe_same_id - tell if file private data have same id
+ *
+ * @fe1: private data of 1. file object
+ * @fe2: private data of 2. file object
+ *
+ * returns !=0 - if ids are the same, 0 - if differ.
+ */
+static inline int heci_fe_same_id(const struct heci_file_private *fe1,
+ const struct heci_file_private *fe2)
+{
+ return ((fe1->host_client_id == fe2->host_client_id)
+ && (fe1->me_client_id == fe2->me_client_id));
+}
+
+#endif /* _HECI_H_ */
diff --git a/drivers/char/heci/heci_data_structures.h b/drivers/char/heci/heci_data_structures.h
new file mode 100644
index 0000000..beacf7c
--- /dev/null
+++ b/drivers/char/heci/heci_data_structures.h
@@ -0,0 +1,536 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_DATA_STRUCTURES_H_
+#define _HECI_DATA_STRUCTURES_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+
+/*
+ * error code definition
+ */
+#define ESLOTS_OVERFLOW 1
+#define ECORRUPTED_MESSAGE_HEADER 1000
+#define ECOMPLETE_MESSAGE 1001
+
+#define HECI_FC_MESSAGE_RESERVED_LENGTH 5
+
+/*
+ * Number of queue lists used by this driver
+ */
+#define HECI_IO_LISTS_NUMBER 7
+
+/*
+ * Maximum transmission unit (MTU) of heci messages
+ */
+#define IAMTHIF_MTU 4160
+
+
+/*
+ * HECI HW Section
+ */
+
+/* HECI registers */
+/* H_CB_WW - Host Circular Buffer (CB) Write Window register */
+#define H_CB_WW 0
+/* H_CSR - Host Control Status register */
+#define H_CSR 4
+/* ME_CB_RW - ME Circular Buffer Read Window register (read only) */
+#define ME_CB_RW 8
+/* ME_CSR_HA - ME Control Status Host Access register (read only) */
+#define ME_CSR_HA 0xC
+
+
+/* register bits of H_CSR (Host Control Status register) */
+/* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */
+#define H_CBD 0xFF000000
+/* Host Circular Buffer Write Pointer */
+#define H_CBWP 0x00FF0000
+/* Host Circular Buffer Read Pointer */
+#define H_CBRP 0x0000FF00
+/* Host Reset */
+#define H_RST 0x00000010
+/* Host Ready */
+#define H_RDY 0x00000008
+/* Host Interrupt Generate */
+#define H_IG 0x00000004
+/* Host Interrupt Status */
+#define H_IS 0x00000002
+/* Host Interrupt Enable */
+#define H_IE 0x00000001
+
+
+/* register bits of ME_CSR_HA (ME Control Status Host Access register) */
+/* ME CB (Circular Buffer) Depth HRA (Host Read Access)
+ * - host read only access to ME_CBD */
+#define ME_CBD_HRA 0xFF000000
+/* ME CB Write Pointer HRA - host read only access to ME_CBWP */
+#define ME_CBWP_HRA 0x00FF0000
+/* ME CB Read Pointer HRA - host read only access to ME_CBRP */
+#define ME_CBRP_HRA 0x0000FF00
+/* ME Reset HRA - host read only access to ME_RST */
+#define ME_RST_HRA 0x00000010
+/* ME Ready HRA - host read only access to ME_RDY */
+#define ME_RDY_HRA 0x00000008
+/* ME Interrupt Generate HRA - host read only access to ME_IG */
+#define ME_IG_HRA 0x00000004
+/* ME Interrupt Status HRA - host read only access to ME_IS */
+#define ME_IS_HRA 0x00000002
+/* ME Interrupt Enable HRA - host read only access to ME_IE */
+#define ME_IE_HRA 0x00000001
+
+#define HECI_MINORS_BASE 1
+#define HECI_MINORS_COUNT 1
+
+#define HECI_MINOR_NUMBER 1
+#define HECI_MAX_OPEN_HANDLE_COUNT 253
+
+/*
+ * debug kernel print macro define
+ */
+extern int heci_debug;
+extern struct device *heci_dev;
+
+#define DBG(format, arg...) do { \
+ if (heci_debug) { \
+ if (heci_dev) \
+ dev_info(heci_dev, "%s: " format, __func__, ## arg); \
+ else \
+ printk(KERN_INFO "heci: %s: " format, \
+ __func__, ## arg); \
+ } \
+} while (0)
+
+
+/*
+ * time to wait HECI become ready after init
+ */
+#define HECI_INTEROP_TIMEOUT (HZ * 7)
+
+/*
+ * watch dog definition
+ */
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+#define HECI_WD_STATE_INDEPENDENCE_MSG_SENT (1 << 0)
+
+#define HECI_WD_HOST_CLIENT_ID 1
+#define HECI_IAMTHIF_HOST_CLIENT_ID 2
+
+struct guid {
+ __u32 data1;
+ __u16 data2;
+ __u16 data3;
+ __u8 data4[8];
+};
+
+/* File state */
+enum file_state {
+ HECI_FILE_INITIALIZING = 0,
+ HECI_FILE_CONNECTING,
+ HECI_FILE_CONNECTED,
+ HECI_FILE_DISCONNECTING,
+ HECI_FILE_DISCONNECTED
+};
+
+/* HECI device states */
+enum heci_states {
+ HECI_INITIALIZING = 0,
+ HECI_ENABLED,
+ HECI_RESETING,
+ HECI_DISABLED,
+ HECI_RECOVERING_FROM_RESET,
+ HECI_POWER_DOWN,
+ HECI_POWER_UP
+};
+
+enum iamthif_states {
+ HECI_IAMTHIF_IDLE,
+ HECI_IAMTHIF_WRITING,
+ HECI_IAMTHIF_FLOW_CONTROL,
+ HECI_IAMTHIF_READING,
+ HECI_IAMTHIF_READ_COMPLETE
+};
+
+enum heci_file_transaction_states {
+ HECI_IDLE,
+ HECI_WRITING,
+ HECI_WRITE_COMPLETE,
+ HECI_FLOW_CONTROL,
+ HECI_READING,
+ HECI_READ_COMPLETE
+};
+
+/* HECI CB */
+enum heci_cb_major_types {
+ HECI_READ = 0,
+ HECI_WRITE,
+ HECI_IOCTL,
+ HECI_OPEN,
+ HECI_CLOSE
+};
+
+/* HECI user data struct */
+struct heci_message_data {
+ __u32 size;
+ char *data;
+} __attribute__((packed));
+
+#define HECI_CONNECT_TIMEOUT 3 /* at least 2 seconds */
+
+#define IAMTHIF_STALL_TIMER 12 /* seconds */
+#define IAMTHIF_READ_TIMER 15 /* seconds */
+
+struct heci_cb_private {
+ struct list_head cb_list;
+ enum heci_cb_major_types major_file_operations;
+ void *file_private;
+ struct heci_message_data request_buffer;
+ struct heci_message_data response_buffer;
+ unsigned long information;
+ unsigned long read_time;
+ struct file *file_object;
+};
+
+/* Private file struct */
+struct heci_file_private {
+ struct list_head link;
+ struct file *file;
+ enum file_state state;
+ wait_queue_head_t tx_wait;
+ wait_queue_head_t rx_wait;
+ wait_queue_head_t wait;
+ spinlock_t file_lock; /* file lock */
+ spinlock_t read_io_lock; /* read lock */
+ spinlock_t write_io_lock; /* write lock */
+ int read_pending;
+ int status;
+ /* ID of client connected */
+ __u8 host_client_id;
+ __u8 me_client_id;
+ __u8 flow_ctrl_creds;
+ __u8 timer_count;
+ enum heci_file_transaction_states reading_state;
+ enum heci_file_transaction_states writing_state;
+ int sm_state;
+ struct heci_cb_private *read_cb;
+};
+
+struct io_heci_list {
+ struct heci_cb_private heci_cb;
+ int status;
+ struct iamt_heci_device *device_extension;
+};
+
+struct heci_driver_version {
+ __u8 major;
+ __u8 minor;
+ __u8 hotfix;
+ __u16 build;
+} __attribute__((packed));
+
+
+struct heci_client {
+ __u32 max_msg_length;
+ __u8 protocol_version;
+} __attribute__((packed));
+
+/*
+ * HECI BUS Interface Section
+ */
+struct heci_msg_hdr {
+ __u32 me_addr:8;
+ __u32 host_addr:8;
+ __u32 length:9;
+ __u32 reserved:6;
+ __u32 msg_complete:1;
+} __attribute__((packed));
+
+
+struct hbm_cmd {
+ __u8 cmd:7;
+ __u8 is_response:1;
+} __attribute__((packed));
+
+
+struct heci_bus_message {
+ struct hbm_cmd cmd;
+ __u8 command_specific_data[];
+} __attribute__((packed));
+
+struct hbm_version {
+ __u8 minor_version;
+ __u8 major_version;
+} __attribute__((packed));
+
+struct hbm_host_version_request {
+ struct hbm_cmd cmd;
+ __u8 reserved;
+ struct hbm_version host_version;
+} __attribute__((packed));
+
+struct hbm_host_version_response {
+ struct hbm_cmd cmd;
+ int host_version_supported;
+ struct hbm_version me_max_version;
+} __attribute__((packed));
+
+struct hbm_host_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_stop_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_me_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_enum_request {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_host_enum_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+ __u8 valid_addresses[32];
+} __attribute__((packed));
+
+struct heci_client_properties {
+ struct guid protocol_name;
+ __u8 protocol_version;
+ __u8 max_number_of_connections;
+ __u8 fixed_address;
+ __u8 single_recv_buf;
+ __u32 max_msg_length;
+} __attribute__((packed));
+
+struct hbm_props_request {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+
+struct hbm_props_response {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 status;
+ __u8 reserved[1];
+ struct heci_client_properties client_properties;
+} __attribute__((packed));
+
+struct hbm_client_connect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved;
+} __attribute__((packed));
+
+struct hbm_client_connect_response {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 status;
+} __attribute__((packed));
+
+struct hbm_client_disconnect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[1];
+} __attribute__((packed));
+
+struct hbm_flow_control {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[HECI_FC_MESSAGE_RESERVED_LENGTH];
+} __attribute__((packed));
+
+struct heci_me_client {
+ struct heci_client_properties props;
+ __u8 client_id;
+ __u8 flow_ctrl_creds;
+} __attribute__((packed));
+
+/* private device struct */
+struct iamt_heci_device {
+ struct pci_dev *pdev; /* pointer to pci device struct */
+ /*
+ * lists of queues
+ */
+ /* array of pointers to aio lists */
+ struct io_heci_list *io_list_array[HECI_IO_LISTS_NUMBER];
+ struct io_heci_list read_list; /* driver read queue */
+ struct io_heci_list write_list; /* driver write queue */
+ struct io_heci_list write_waiting_list; /* write waiting queue */
+ struct io_heci_list ctrl_wr_list; /* managed write IOCTL list */
+ struct io_heci_list ctrl_rd_list; /* managed read IOCTL list */
+ struct io_heci_list pthi_cmd_list; /* PTHI list for cmd waiting */
+
+ /* driver managed PTHI list for reading completed pthi cmd data */
+ struct io_heci_list pthi_read_complete_list;
+ /*
+ * list of files
+ */
+ struct list_head file_list;
+ /*
+ * memory of device
+ */
+ unsigned int mem_base;
+ unsigned int mem_length;
+ char *mem_addr;
+ /*
+ * lock for the device
+ */
+ spinlock_t device_lock; /* device lock*/
+ struct work_struct work;
+ int recvd_msg;
+
+ struct task_struct *reinit_tsk;
+
+ struct timer_list wd_timer;
+ /*
+ * hw states of host and fw(ME)
+ */
+ __u32 host_hw_state;
+ __u32 me_hw_state;
+ /*
+ * waiting queue for receive message from FW
+ */
+ wait_queue_head_t wait_recvd_msg;
+ wait_queue_head_t wait_stop_wd;
+ /*
+ * heci device states
+ */
+ enum heci_states heci_state;
+ int stop;
+
+ __u32 extra_write_index;
+ __u32 rd_msg_buf[128]; /* used for control messages */
+ __u32 wr_msg_buf[128]; /* used for control messages */
+ __u32 ext_msg_buf[8]; /* for control responses */
+ __u32 rd_msg_hdr;
+
+ struct hbm_version version;
+
+ int host_buffer_is_empty;
+ struct heci_file_private wd_file_ext;
+ struct heci_me_client *me_clients; /* Note: memory has to be allocated*/
+ __u8 heci_me_clients[32]; /* list of existing clients */
+ __u8 num_heci_me_clients;
+ __u8 heci_host_clients[32]; /* list of existing clients */
+ __u8 current_host_client_id;
+
+ int wd_pending;
+ int wd_stoped;
+ __u16 wd_timeout; /* seconds ((wd_data[1] << 8) + wd_data[0]) */
+ unsigned char wd_data[HECI_START_WD_DATA_SIZE];
+
+
+ __u16 wd_due_counter;
+ int asf_mode;
+ int wd_bypass; /* if 1, don't refresh watchdog ME client */
+
+ struct file *iamthif_file_object;
+ struct heci_file_private iamthif_file_ext;
+ int iamthif_ioctl;
+ int iamthif_canceled;
+ __u32 iamthif_timer;
+ __u32 iamthif_stall_timer;
+ unsigned char iamthif_msg_buf[IAMTHIF_MTU];
+ __u32 iamthif_msg_buf_size;
+ __u32 iamthif_msg_buf_index;
+ int iamthif_flow_control_pending;
+ enum iamthif_states iamthif_state;
+
+ struct heci_cb_private *iamthif_current_cb;
+ __u8 write_hang;
+ int need_reset;
+ long open_handle_count;
+
+};
+
+/**
+ * read_heci_register - Read a byte from the heci device
+ *
+ * @dev: the device structure
+ * @offset: offset from which to read the data
+ *
+ * returns the byte read.
+ */
+static inline __u32 read_heci_register(struct iamt_heci_device *dev,
+ unsigned long offset)
+{
+ return readl(dev->mem_addr + offset);
+}
+
+/**
+ * write_heci_register - Write 4 bytes to the heci device
+ *
+ * @dev: the device structure
+ * @offset: offset from which to write the data
+ * @value: the byte to write
+ */
+static inline void write_heci_register(struct iamt_heci_device *dev,
+ unsigned long offset, __u32 value)
+{
+ writel(value, dev->mem_addr + offset);
+}
+
+#endif /* _HECI_DATA_STRUCTURES_H_ */
diff --git a/drivers/char/heci/heci_init.c b/drivers/char/heci/heci_init.c
new file mode 100644
index 0000000..87853a9
--- /dev/null
+++ b/drivers/char/heci/heci_init.c
@@ -0,0 +1,1077 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/moduleparam.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+
+#include "heci_data_structures.h"
+#include "heci_interface.h"
+#include "heci.h"
+
+
+const __u8 heci_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 };
+const __u8 heci_stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10 };
+
+const __u8 heci_wd_state_independence_msg[3][4] = {
+ {0x05, 0x02, 0x51, 0x10},
+ {0x05, 0x02, 0x52, 0x10},
+ {0x07, 0x02, 0x01, 0x10}
+};
+
+const struct guid heci_asf_guid = {
+ 0x75B30CD6, 0xA29E, 0x4AF7,
+ {0xA7, 0x12, 0xE6, 0x17, 0x43, 0x93, 0xC8, 0xA6}
+};
+const struct guid heci_wd_guid = {
+ 0x05B79A6F, 0x4628, 0x4D7F,
+ {0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB}
+};
+const struct guid heci_pthi_guid = {
+ 0x12f80028, 0xb4b7, 0x4b2d,
+ {0xac, 0xa8, 0x46, 0xe0, 0xff, 0x65, 0x81, 0x4c}
+};
+
+
+/*
+ * heci init function prototypes
+ */
+static void heci_check_asf_mode(struct iamt_heci_device *dev);
+static int host_start_message(struct iamt_heci_device *dev);
+static int host_enum_clients_message(struct iamt_heci_device *dev);
+static int allocate_me_clients_storage(struct iamt_heci_device *dev);
+static void host_init_wd(struct iamt_heci_device *dev);
+static void host_init_iamthif(struct iamt_heci_device *dev);
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout);
+
+
+/**
+ * heci_initialize_list - Sets up a queue list.
+ *
+ * @list: An instance of our list structure
+ * @dev: Device object for our driver
+ */
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev)
+{
+ /* initialize our queue list */
+ INIT_LIST_HEAD(&list->heci_cb.cb_list);
+ list->status = 0;
+ list->device_extension = dev;
+}
+
+/**
+ * heci_flush_queues - flush our queues list belong to file_ext.
+ *
+ * @dev: Device object for our driver
+ * @file_ext: private data of the file object
+ */
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int i;
+
+ if (!dev || !file_ext)
+ return;
+
+ /* flush our queue list belong to file_ext */
+ for (i = 0; i < HECI_IO_LISTS_NUMBER; i++) {
+ DBG("remove list entry belong to file_ext\n");
+ heci_flush_list(dev->io_list_array[i], file_ext);
+ }
+}
+
+
+/**
+ * heci_flush_list - remove list entry belong to file_ext.
+ *
+ * @list: An instance of our list structure
+ * @file_ext: private data of the file object
+ */
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext)
+{
+ struct heci_file_private *file_ext_tmp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if (!list || !file_ext)
+ return;
+
+ if (list->status != 0)
+ return;
+
+ if (list_empty(&list->heci_cb.cb_list))
+ return;
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &list->heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos) {
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext_tmp) {
+ if (heci_fe_same_id(file_ext, file_ext_tmp))
+ list_del(&priv_cb_pos->cb_list);
+ }
+ }
+ }
+}
+
+/**
+ * heci_reset_iamthif_params - initializes heci device iamthif
+ *
+ * @dev: The heci device structure
+ */
+static void heci_reset_iamthif_params(struct iamt_heci_device *dev)
+{
+ /* reset iamthif parameters. */
+ dev->iamthif_current_cb = NULL;
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_file_ext.file = NULL;
+ dev->iamthif_ioctl = 0;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+}
+
+/**
+ * init_heci_device - allocates and initializes the heci device structure
+ *
+ * @pdev: The pci device structure
+ *
+ * returns The heci_device_device pointer on success, NULL on failure.
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev)
+{
+ int i;
+ struct iamt_heci_device *dev;
+
+ dev = kzalloc(sizeof(struct iamt_heci_device), GFP_KERNEL);
+ if (!dev)
+ return NULL;
+
+ /* setup our list array */
+ dev->io_list_array[0] = &dev->read_list;
+ dev->io_list_array[1] = &dev->write_list;
+ dev->io_list_array[2] = &dev->write_waiting_list;
+ dev->io_list_array[3] = &dev->ctrl_wr_list;
+ dev->io_list_array[4] = &dev->ctrl_rd_list;
+ dev->io_list_array[5] = &dev->pthi_cmd_list;
+ dev->io_list_array[6] = &dev->pthi_read_complete_list;
+ INIT_LIST_HEAD(&dev->file_list);
+ INIT_LIST_HEAD(&dev->wd_file_ext.link);
+ INIT_LIST_HEAD(&dev->iamthif_file_ext.link);
+ spin_lock_init(&dev->device_lock);
+ init_waitqueue_head(&dev->wait_recvd_msg);
+ init_waitqueue_head(&dev->wait_stop_wd);
+ dev->heci_state = HECI_INITIALIZING;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+
+ /* init work for schedule work */
+ INIT_WORK(&dev->work, NULL);
+ for (i = 0; i < HECI_IO_LISTS_NUMBER; i++)
+ heci_initialize_list(dev->io_list_array[i], dev);
+ dev->pdev = pdev;
+ return dev;
+}
+
+
+
+
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout)
+{
+ return wait_event_interruptible_timeout(dev->wait_recvd_msg,
+ (dev->recvd_msg), timeout);
+}
+
+/**
+ * heci_hw_init - init host and fw to start work.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_hw_init(struct iamt_heci_device *dev)
+{
+ int err = 0;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ DBG("host_hw_state = 0x%08x, mestate = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ /* acknowledge interrupt and stop interupts */
+ heci_set_csr_register(dev);
+ }
+ dev->recvd_msg = 0;
+ DBG("reset in start the heci device.\n");
+
+ heci_reset(dev, 1);
+
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ /* wait for ME to turn on ME_RDY */
+ if (!dev->recvd_msg)
+ err = heci_wait_event_int_timeout(dev, HECI_INTEROP_TIMEOUT);
+
+ if (!err && !dev->recvd_msg) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("wait_event_interruptible_timeout failed"
+ "on wait for ME to turn on ME_RDY.\n");
+ return -ENODEV;
+ } else {
+ if (!(((dev->host_hw_state & H_RDY) == H_RDY)
+ && ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state,
+ dev->me_hw_state);
+
+ if (!(dev->host_hw_state & H_RDY) != H_RDY)
+ DBG("host turn off H_RDY.\n");
+
+ if (!(dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ DBG("ME turn off ME_RDY.\n");
+
+ printk(KERN_ERR
+ "heci: link layer initialization failed.\n");
+ return -ENODEV;
+ }
+ }
+ dev->recvd_msg = 0;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+ DBG("ME turn on ME_RDY and host turn on H_RDY.\n");
+ printk(KERN_INFO "heci: link layer has been established.\n");
+ return 0;
+}
+
+/**
+ * heci_hw_reset - reset fw via heci csr register.
+ *
+ * @dev: Device object for our driver
+ * @interrupts: if interrupt should be enable after reset.
+ */
+static void heci_hw_reset(struct iamt_heci_device *dev, int interrupts)
+{
+ dev->host_hw_state |= (H_RST | H_IG);
+
+ if (interrupts)
+ heci_csr_enable_interrupts(dev);
+ else
+ heci_csr_disable_interrupts(dev);
+
+ BUG_ON((dev->host_hw_state & H_RST) != H_RST);
+ BUG_ON((dev->host_hw_state & H_RDY) != 0);
+}
+
+/**
+ * heci_reset - reset host and fw.
+ *
+ * @dev: Device object for our driver
+ * @interrupts: if interrupt should be enable after reset.
+ */
+void heci_reset(struct iamt_heci_device *dev, int interrupts)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int unexpected = 0;
+
+ if (dev->heci_state == HECI_RECOVERING_FROM_RESET) {
+ dev->need_reset = 1;
+ return;
+ }
+
+ if (dev->heci_state != HECI_INITIALIZING &&
+ dev->heci_state != HECI_DISABLED &&
+ dev->heci_state != HECI_POWER_DOWN &&
+ dev->heci_state != HECI_POWER_UP)
+ unexpected = 1;
+
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+
+ DBG("before reset host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ heci_hw_reset(dev, interrupts);
+
+ dev->host_hw_state &= ~H_RST;
+ dev->host_hw_state |= H_IG;
+
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+
+ DBG("currently saved host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ dev->need_reset = 0;
+
+ if (dev->heci_state != HECI_INITIALIZING) {
+ if ((dev->heci_state != HECI_DISABLED) &&
+ (dev->heci_state != HECI_POWER_DOWN))
+ dev->heci_state = HECI_RESETING;
+
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->flow_ctrl_creds = 0;
+ file_pos->read_cb = NULL;
+ file_pos->timer_count = 0;
+ }
+ /* remove entry if already in list */
+ DBG("list del iamthif and wd file list.\n");
+ heci_remove_client_from_file_list(dev,
+ dev->wd_file_ext.host_client_id);
+
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+
+ heci_reset_iamthif_params(dev);
+ dev->wd_due_counter = 0;
+ dev->extra_write_index = 0;
+ }
+
+ dev->num_heci_me_clients = 0;
+ dev->rd_msg_hdr = 0;
+ dev->stop = 0;
+ dev->wd_pending = 0;
+
+ /* update the state of the registers after reset */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ DBG("after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if (unexpected)
+ printk(KERN_WARNING "heci: unexpected reset.\n");
+
+ /* Wake up all readings so they can be interrupted */
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (&file_pos->rx_wait &&
+ waitqueue_active(&file_pos->rx_wait)) {
+ printk(KERN_INFO "heci: Waking up client!\n");
+ wake_up_interruptible(&file_pos->rx_wait);
+ }
+ }
+ /* remove all waiting requests */
+ if (dev->write_list.status == 0 &&
+ !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos) {
+ list_del(&priv_cb_pos->cb_list);
+ heci_free_cb_private(priv_cb_pos);
+ }
+ }
+ }
+}
+
+/**
+ * heci_initialize_clients - heci communication initialization.
+ *
+ * @dev: Device object for our driver
+ */
+int heci_initialize_clients(struct iamt_heci_device *dev)
+{
+ int status;
+
+ msleep(100); /* FW needs time to be ready to talk with us */
+ DBG("link is established start sending messages.\n");
+ /* link is established start sending messages. */
+ status = host_start_message(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("start sending messages failed.\n");
+ return status;
+ }
+
+ /* enumerate clients */
+ status = host_enum_clients_message(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("enum clients failed.\n");
+ return status;
+ }
+ /* allocate storage for ME clients representation */
+ status = allocate_me_clients_storage(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->num_heci_me_clients = 0;
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("allocate clients failed.\n");
+ return status;
+ }
+
+ heci_check_asf_mode(dev);
+ /*heci initialization wd */
+ host_init_wd(dev);
+ /*heci initialization iamthif client */
+ host_init_iamthif(dev);
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->need_reset) {
+ dev->need_reset = 0;
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+
+ memset(dev->heci_host_clients, 0, sizeof(dev->heci_host_clients));
+ dev->open_handle_count = 0;
+ dev->heci_host_clients[0] |= 7;
+ dev->current_host_client_id = 3;
+ dev->heci_state = HECI_ENABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("initialization heci clients successful.\n");
+ return 0;
+}
+
+/**
+ * heci_task_initialize_clients - heci reinitialization task
+ *
+ * @data: Device object for our driver
+ */
+int heci_task_initialize_clients(void *data)
+{
+ int ret;
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->reinit_tsk != NULL) {
+ spin_unlock_bh(&dev->device_lock);
+ DBG("reinit task already started.\n");
+ return 0;
+ }
+ dev->reinit_tsk = current;
+ current->flags |= PF_NOFREEZE;
+ spin_unlock_bh(&dev->device_lock);
+
+ ret = heci_initialize_clients(dev);
+
+ spin_lock_bh(&dev->device_lock);
+ dev->reinit_tsk = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ return ret;
+}
+
+/**
+ * host_start_message - heci host send start message.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_start_message(struct iamt_heci_device *dev)
+{
+ long timeout = 60; /* 60 second */
+
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_version_request *host_start_req;
+ struct hbm_host_stop_request *host_stop_req;
+ int err = 0;
+
+ /* host start message */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_version_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_start_req =
+ (struct hbm_host_version_request *) &dev->wr_msg_buf[1];
+ memset(host_start_req, 0, sizeof(struct hbm_host_version_request));
+ host_start_req->cmd.cmd = HOST_START_REQ_CMD;
+ host_start_req->host_version.major_version = HBM_MAJOR_VERSION;
+ host_start_req->host_version.minor_version = HBM_MINOR_VERSION;
+ dev->recvd_msg = 0;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_start_req),
+ heci_hdr->length)) {
+ DBG("send version to fw fail.\n");
+ return -ENODEV;
+ }
+ DBG("call wait_event_interruptible_timeout for response message.\n");
+ /* wait for response */
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait_timeout failed on host start response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ DBG("wait_timeout successful on host start response message.\n");
+ if ((dev->version.major_version != HBM_MAJOR_VERSION) ||
+ (dev->version.minor_version != HBM_MINOR_VERSION)) {
+ /* send stop message */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_stop_req =
+ (struct hbm_host_stop_request *) &dev->wr_msg_buf[1];
+
+ memset(host_stop_req, 0, sizeof(struct hbm_host_stop_request));
+ host_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ host_stop_req->reason = DRIVER_STOP_REQUEST;
+ heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_stop_req),
+ heci_hdr->length);
+ DBG("version mismatch.\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/**
+ * host_enum_clients_message - host send enumeration client request message.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_enum_clients_message(struct iamt_heci_device *dev)
+{
+ long timeout = 5; /*5 second */
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_enum_request *host_enum_req;
+ int err = 0;
+ __u8 i, j;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ /* enumerate clients */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_enum_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1];
+ memset(host_enum_req, 0, sizeof(struct hbm_host_enum_request));
+ host_enum_req->cmd.cmd = HOST_ENUM_REQ_CMD;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_enum_req),
+ heci_hdr->length)) {
+ DBG("send enumeration request failed.\n");
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait_event_interruptible_timeout failed "
+ "on enumeration clients response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+
+ spin_lock_bh(&dev->device_lock);
+ /* count how many ME clients we have */
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0)
+ dev->num_heci_me_clients++;
+
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ return 0;
+}
+
+/**
+ * host_client_properties - reads properties for client
+ *
+ * @dev: Device object for our driver
+ * @idx: client index in me client array
+ * @client_id: id of the client
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_client_properties(struct iamt_heci_device *dev,
+ struct heci_me_client *client)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_props_request *host_cli_req;
+ int err;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_props_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_cli_req = (struct hbm_props_request *) &dev->wr_msg_buf[1];
+ memset(host_cli_req, 0, sizeof(struct hbm_props_request));
+ host_cli_req->cmd.cmd = HOST_CLIENT_PROPERTEIS_REQ_CMD;
+ host_cli_req->address = client->client_id;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_cli_req),
+ heci_hdr->length)) {
+ DBG("send props request failed.\n");
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev, 10 * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait failed on props resp msg.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ return 0;
+}
+
+/**
+ * allocate_me_clients_storage - allocate storage for me clients
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int allocate_me_clients_storage(struct iamt_heci_device *dev)
+{
+ struct heci_me_client *clients;
+ struct heci_me_client *client;
+ __u8 num, i, j;
+ int err;
+
+ if (dev->num_heci_me_clients <= 0)
+ return 0;
+
+ spin_lock_bh(&dev->device_lock);
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ /* allocate storage for ME clients representation */
+ clients = kcalloc(dev->num_heci_me_clients,
+ sizeof(struct heci_me_client), GFP_KERNEL);
+ if (!clients) {
+ DBG("memory allocation for ME clients failed.\n");
+ return -ENOMEM;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ dev->me_clients = clients;
+ spin_unlock_bh(&dev->device_lock);
+
+ num = 0;
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0) {
+ client = &dev->me_clients[num];
+ client->client_id = (i * 8) + j;
+ client->flow_ctrl_creds = 0;
+ err = host_client_properties(dev, client);
+ if (err != 0) {
+ spin_lock_bh(&dev->device_lock);
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+ spin_unlock_bh(&dev->device_lock);
+ return err;
+ }
+ num++;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * heci_init_file_private - initializes private file structure.
+ *
+ * @priv: private file structure to be initialized
+ * @file: the file structure
+ */
+static void heci_init_file_private(struct heci_file_private *priv,
+ struct file *file)
+{
+ memset(priv, 0, sizeof(struct heci_file_private));
+ spin_lock_init(&priv->file_lock);
+ spin_lock_init(&priv->read_io_lock);
+ spin_lock_init(&priv->write_io_lock);
+ init_waitqueue_head(&priv->wait);
+ init_waitqueue_head(&priv->rx_wait);
+ DBG("priv->rx_wait =%p\n", &priv->rx_wait);
+ init_waitqueue_head(&priv->tx_wait);
+ INIT_LIST_HEAD(&priv->link);
+ priv->reading_state = HECI_IDLE;
+ priv->writing_state = HECI_IDLE;
+}
+
+/**
+ * heci_find_me_client - search for ME client guid
+ * sets client_id in heci_file_private if found
+ * @dev: Device object for our driver
+ * @priv: private file structure to set client_id in
+ * @cguid: searched guid of ME client
+ * @client_id: id of host client to be set in file private structure
+ *
+ * returns ME client index
+ */
+static __u8 heci_find_me_client(struct iamt_heci_device *dev,
+ struct heci_file_private *priv,
+ const struct guid *cguid, __u8 client_id)
+{
+ __u8 i;
+
+ if ((dev == NULL) || (priv == NULL) || (cguid == NULL))
+ return 0;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(cguid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ priv->me_client_id = dev->me_clients[i].client_id;
+ priv->state = HECI_FILE_CONNECTING;
+ priv->host_client_id = client_id;
+
+ list_add_tail(&priv->link, &dev->file_list);
+ return i;
+ }
+ }
+ return 0;
+}
+
+/**
+ * heci_check_asf_mode - check for ASF client
+ *
+ * @dev: Device object for our driver
+ */
+static void heci_check_asf_mode(struct iamt_heci_device *dev)
+{
+ __u8 i;
+
+ spin_lock_bh(&dev->device_lock);
+ dev->asf_mode = 0;
+ /* find ME ASF client - otherwise assume AMT mode */
+ DBG("find ME ASF client - otherwise assume AMT mode.\n");
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_asf_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ dev->asf_mode = 1;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("found ME ASF client.\n");
+ return;
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+ DBG("assume AMT mode.\n");
+}
+
+/**
+ * heci_connect_me_client - connect ME client
+ * @dev: Device object for our driver
+ * @priv: private file structure
+ * @timeout: connect timeout in seconds
+ *
+ * returns 1 - if connected, 0 - if not
+ */
+static __u8 heci_connect_me_client(struct iamt_heci_device *dev,
+ struct heci_file_private *priv,
+ long timeout)
+{
+ int err = 0;
+
+ if ((dev == NULL) || (priv == NULL))
+ return 0;
+
+ if (!heci_connect(dev, priv)) {
+ DBG("failed to call heci_connect for client_id=%d.\n",
+ priv->host_client_id);
+ spin_lock_bh(&dev->device_lock);
+ heci_remove_client_from_file_list(dev, priv->host_client_id);
+ priv->state = HECI_FILE_DISCONNECTED;
+ spin_unlock_bh(&dev->device_lock);
+ return 0;
+ }
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == priv->state ||
+ HECI_FILE_DISCONNECTED == priv->state),
+ timeout * HZ);
+ if (HECI_FILE_CONNECTED != priv->state) {
+ spin_lock_bh(&dev->device_lock);
+ heci_remove_client_from_file_list(dev, priv->host_client_id);
+ DBG("failed to connect client_id=%d state=%d.\n",
+ priv->host_client_id, priv->state);
+ if (err)
+ DBG("failed connect err=%08x\n", err);
+ priv->state = HECI_FILE_DISCONNECTED;
+ spin_unlock_bh(&dev->device_lock);
+ return 0;
+ }
+ DBG("successfully connected client_id=%d.\n",
+ priv->host_client_id);
+ return 1;
+}
+
+/**
+ * host_init_wd - heci initialization wd.
+ *
+ * @dev: Device object for our driver
+ */
+static void host_init_wd(struct iamt_heci_device *dev)
+{
+ spin_lock_bh(&dev->device_lock);
+
+ heci_init_file_private(&dev->wd_file_ext, NULL);
+
+ /* look for WD client and connect to it */
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTED;
+ dev->wd_timeout = 0;
+
+ if (dev->asf_mode) {
+ memcpy(dev->wd_data, heci_stop_wd_params, HECI_WD_PARAMS_SIZE);
+ } else {
+ /* AMT mode */
+ dev->wd_timeout = AMT_WD_VALUE;
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ memcpy(dev->wd_data, heci_start_wd_params, HECI_WD_PARAMS_SIZE);
+ memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
+ &dev->wd_timeout, sizeof(__u16));
+ }
+
+ /* find ME WD client */
+ heci_find_me_client(dev, &dev->wd_file_ext,
+ &heci_wd_guid, HECI_WD_HOST_CLIENT_ID);
+ spin_unlock_bh(&dev->device_lock);
+
+ DBG("check wd_file_ext\n");
+ if (HECI_FILE_CONNECTING == dev->wd_file_ext.state) {
+ if (heci_connect_me_client(dev, &dev->wd_file_ext, 15) == 1) {
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 1;
+ else
+ dev->wd_due_counter = 0;
+ DBG("successfully connected to WD client.\n");
+ }
+ } else
+ DBG("failed to find WD client.\n");
+
+
+ spin_lock_bh(&dev->device_lock);
+ dev->wd_timer.function = &heci_wd_timer;
+ dev->wd_timer.data = (unsigned long) dev;
+ spin_unlock_bh(&dev->device_lock);
+}
+
+
+/**
+ * host_init_iamthif - heci initialization iamthif client.
+ *
+ * @dev: Device object for our driver
+ *
+ */
+static void host_init_iamthif(struct iamt_heci_device *dev)
+{
+ __u8 i;
+
+ spin_lock_bh(&dev->device_lock);
+
+ heci_init_file_private(&dev->iamthif_file_ext, NULL);
+ dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTED;
+
+ /* find ME PTHI client */
+ i = heci_find_me_client(dev, &dev->iamthif_file_ext,
+ &heci_pthi_guid, HECI_IAMTHIF_HOST_CLIENT_ID);
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTING) {
+ DBG("failed to find iamthif client.\n");
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ BUG_ON(dev->me_clients[i].props.max_msg_length != IAMTHIF_MTU);
+
+ spin_unlock_bh(&dev->device_lock);
+ if (heci_connect_me_client(dev, &dev->iamthif_file_ext, 15) == 1) {
+ DBG("connected to iamthif client.\n");
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ }
+}
+
+/**
+ * heci_alloc_file_private - allocates a private file structure and set it up.
+ * @file: the file structure
+ *
+ * returns The allocated file or NULL on failure
+ */
+struct heci_file_private *heci_alloc_file_private(struct file *file)
+{
+ struct heci_file_private *priv;
+
+ priv = kmalloc(sizeof(struct heci_file_private), GFP_KERNEL);
+ if (!priv)
+ return NULL;
+
+ heci_init_file_private(priv, file);
+
+ return priv;
+}
+
+
+
+/**
+ * heci_disconnect_host_client - send disconnect message to fw from host client.
+ *
+ * @dev: Device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int rets, err;
+ long timeout = 15; /* 15 seconds */
+ struct heci_cb_private *priv_cb;
+
+ if ((!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext->state != HECI_FILE_DISCONNECTING)
+ return 0;
+
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->file_private = file_ext;
+ priv_cb->major_file_operations = HECI_CLOSE;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (heci_disconnect(dev, file_ext)) {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ DBG("failed to call heci_disconnect.\n");
+ goto free;
+ }
+ } else {
+ DBG("add disconnect cb to control write list\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+ if (HECI_FILE_DISCONNECTED == file_ext->state) {
+ rets = 0;
+ DBG("successfully disconnected from fw client.\n");
+ } else {
+ rets = -ENODEV;
+ if (HECI_FILE_DISCONNECTED != file_ext->state)
+ DBG("wrong status client disconnect.\n");
+
+ if (err)
+ DBG("wait failed disconnect err=%08x\n", err);
+
+ DBG("failed to disconnect from fw client.\n");
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_list(&dev->ctrl_rd_list, file_ext);
+ heci_flush_list(&dev->ctrl_wr_list, file_ext);
+ spin_unlock_bh(&dev->device_lock);
+free:
+ heci_free_cb_private(priv_cb);
+ return rets;
+}
+
+/**
+ * heci_remove_client_from_file_list -
+ * remove file private data from device file list
+ *
+ * @dev: Device object for our driver
+ * @host_client_id: host client id to be removed
+ */
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (host_client_id == file_pos->host_client_id) {
+ DBG("remove host client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del_init(&file_pos->link);
+ break;
+ }
+ }
+}
diff --git a/drivers/char/heci/heci_interface.c b/drivers/char/heci/heci_interface.c
new file mode 100644
index 0000000..c5f51a7
--- /dev/null
+++ b/drivers/char/heci/heci_interface.c
@@ -0,0 +1,485 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include "heci.h"
+#include "heci_interface.h"
+
+
+/**
+ * heci_set_csr_register - write H_CSR register to the heci device
+ *
+ * @dev: device object for our driver
+ */
+void heci_set_csr_register(struct iamt_heci_device *dev)
+{
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+}
+
+/**
+ * heci_csr_enable_interrupts - enable heci device interrupts
+ *
+ * @dev: device object for our driver
+ */
+void heci_csr_enable_interrupts(struct iamt_heci_device *dev)
+{
+ dev->host_hw_state |= H_IE;
+ heci_set_csr_register(dev);
+}
+
+/**
+ * heci_csr_disable_interrupts - disable heci device interrupts
+ *
+ * @dev: device object for our driver
+ */
+void heci_csr_disable_interrupts(struct iamt_heci_device *dev)
+{
+ dev->host_hw_state &= ~H_IE;
+ heci_set_csr_register(dev);
+}
+
+
+/**
+ * _host_get_filled_slots - get number of device filled buffer slots
+ *
+ * @device: the device structure
+ *
+ * returns numer of filled slots
+ */
+static unsigned char _host_get_filled_slots(const struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+
+ read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8);
+ write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16);
+
+ return (unsigned char) (write_ptr - read_ptr);
+}
+
+/**
+ * host_buffer_is_empty - check if host buffer is empty.
+ *
+ * @dev: device object for our driver
+ *
+ * returns 1 if empty, 0 - otherwise.
+ */
+int host_buffer_is_empty(struct iamt_heci_device *dev)
+{
+ unsigned char filled_slots;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ filled_slots = _host_get_filled_slots(dev);
+
+ if (filled_slots > 0)
+ return 0;
+
+ return 1;
+}
+
+/**
+ * count_empty_write_slots - count write empty slots.
+ *
+ * @dev: device object for our driver
+ *
+ * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise empty slots count
+ */
+__s32 count_empty_write_slots(const struct iamt_heci_device *dev)
+{
+ unsigned char buffer_depth, filled_slots, empty_slots;
+
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = _host_get_filled_slots(dev);
+ empty_slots = buffer_depth - filled_slots;
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ return (__s32) empty_slots;
+}
+
+/**
+ * heci_write_message - write a message to heci device.
+ *
+ * @dev: device object for our driver
+ * @heci_hdr: header of message
+ * @write_buffer: message buffer will be write
+ * @write_length: message size will be write
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length)
+{
+ __u32 temp_msg = 0;
+ unsigned long bytes_written = 0;
+ unsigned char buffer_depth, filled_slots, empty_slots;
+ unsigned long dw_to_write;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ DBG("host_hw_state = 0x%08x.\n", dev->host_hw_state);
+ DBG("heci_write_message header=%08x.\n", *((__u32 *) header));
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = _host_get_filled_slots(dev);
+ empty_slots = buffer_depth - filled_slots;
+ DBG("filled = %hu, empty = %hu.\n", filled_slots, empty_slots);
+
+ dw_to_write = ((write_length + 3) / 4);
+
+ if (dw_to_write > empty_slots)
+ return 0;
+
+ write_heci_register(dev, H_CB_WW, *((__u32 *) header));
+
+ while (write_length >= 4) {
+ write_heci_register(dev, H_CB_WW,
+ *(__u32 *) (write_buffer + bytes_written));
+ bytes_written += 4;
+ write_length -= 4;
+ }
+
+ if (write_length > 0) {
+ memcpy(&temp_msg, &write_buffer[bytes_written], write_length);
+ write_heci_register(dev, H_CB_WW, temp_msg);
+ }
+
+ dev->host_hw_state |= H_IG;
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ if ((dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ return 0;
+
+ dev->write_hang = 0;
+ return 1;
+}
+
+/**
+ * count_full_read_slots - count read full slots.
+ *
+ * @dev: device object for our driver
+ *
+ * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise filled slots count
+ */
+__s32 count_full_read_slots(struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+ unsigned char buffer_depth, filled_slots;
+
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ buffer_depth = (unsigned char)((dev->me_hw_state & ME_CBD_HRA) >> 24);
+ read_ptr = (char) ((dev->me_hw_state & ME_CBRP_HRA) >> 8);
+ write_ptr = (char) ((dev->me_hw_state & ME_CBWP_HRA) >> 16);
+ filled_slots = (unsigned char) (write_ptr - read_ptr);
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ DBG("filled_slots =%08x \n", filled_slots);
+ return (__s32) filled_slots;
+}
+
+/**
+ * heci_read_slots - read a message from heci device.
+ *
+ * @dev: device object for our driver
+ * @buffer: message buffer will be write
+ * @buffer_length: message size will be read
+ */
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length)
+{
+ __u32 i = 0;
+ unsigned char temp_buf[sizeof(__u32)];
+
+ while (buffer_length >= sizeof(__u32)) {
+ ((__u32 *) buffer)[i] = read_heci_register(dev, ME_CB_RW);
+ DBG("buffer[%d]= %d\n", i, ((__u32 *) buffer)[i]);
+ i++;
+ buffer_length -= sizeof(__u32);
+ }
+
+ if (buffer_length > 0) {
+ *((__u32 *) &temp_buf) = read_heci_register(dev, ME_CB_RW);
+ memcpy(&buffer[i * 4], temp_buf, buffer_length);
+ }
+
+ dev->host_hw_state |= H_IG;
+ heci_set_csr_register(dev);
+}
+
+/**
+ * flow_ctrl_creds - check flow_control credentials.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if flow_ctrl_creds >0, 0 - otherwise.
+ */
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return 0;
+
+ if (file_ext == NULL)
+ return 0;
+
+ if (file_ext->flow_ctrl_creds > 0)
+ return 1;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].flow_ctrl_creds > 0) {
+ BUG_ON(dev->me_clients[i].props.single_recv_buf
+ == 0);
+ return 1;
+ }
+ return 0;
+ }
+ }
+ BUG();
+ return 0;
+}
+
+/**
+ * flow_ctrl_reduce - reduce flow_control.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ */
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].props.single_recv_buf != 0) {
+ BUG_ON(dev->me_clients[i].flow_ctrl_creds <= 0);
+ dev->me_clients[i].flow_ctrl_creds--;
+ } else {
+ BUG_ON(file_ext->flow_ctrl_creds <= 0);
+ file_ext->flow_ctrl_creds--;
+ }
+ return;
+ }
+ }
+ BUG();
+}
+
+/**
+ * heci_send_flow_control - send flow control to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_flow_control *heci_flow_control;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_flow_control);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_flow_control = (struct hbm_flow_control *) &dev->wr_msg_buf[1];
+ memset(heci_flow_control, 0, sizeof(heci_flow_control));
+ heci_flow_control->host_addr = file_ext->host_client_id;
+ heci_flow_control->me_addr = file_ext->me_client_id;
+ heci_flow_control->cmd.cmd = HECI_FLOW_CONTROL_CMD;
+ memset(heci_flow_control->reserved, 0,
+ sizeof(heci_flow_control->reserved));
+ DBG("sending flow control host client = %d, me client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_flow_control,
+ sizeof(struct hbm_flow_control)))
+ return 0;
+
+ return 1;
+
+}
+
+/**
+ * other_client_is_connecting - check if other
+ * client with the same client id is connected.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if other client is connected, 0 - otherwise.
+ */
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if ((file_pos->state == HECI_FILE_CONNECTING)
+ && (file_pos != file_ext)
+ && file_ext->me_client_id == file_pos->me_client_id)
+ return 1;
+
+ }
+ return 0;
+}
+
+/**
+ * heci_send_wd - send watch dog message to fw.
+ *
+ * @dev: device object for our driver
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_send_wd(struct iamt_heci_device *dev)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = dev->wd_file_ext.host_client_id;
+ heci_hdr->me_addr = dev->wd_file_ext.me_client_id;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ if (!memcmp(dev->wd_data, heci_start_wd_params,
+ HECI_WD_PARAMS_SIZE)) {
+ heci_hdr->length = HECI_START_WD_DATA_SIZE;
+ } else {
+ BUG_ON(memcmp(dev->wd_data, heci_stop_wd_params,
+ HECI_WD_PARAMS_SIZE));
+ heci_hdr->length = HECI_WD_PARAMS_SIZE;
+ }
+
+ if (!heci_write_message(dev, heci_hdr, dev->wd_data, heci_hdr->length))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_disconnect - send disconnect message to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_disconnect_request *heci_cli_disconnect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_disconnect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_disconnect =
+ (struct hbm_client_disconnect_request *) &dev->wr_msg_buf[1];
+ memset(heci_cli_disconnect, 0, sizeof(heci_cli_disconnect));
+ heci_cli_disconnect->host_addr = file_ext->host_client_id;
+ heci_cli_disconnect->me_addr = file_ext->me_client_id;
+ heci_cli_disconnect->cmd.cmd = CLIENT_DISCONNECT_REQ_CMD;
+ heci_cli_disconnect->reserved[0] = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_disconnect,
+ sizeof(struct hbm_client_disconnect_request)))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_connect - send connect message to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_request *heci_cli_connect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_connect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_connect =
+ (struct hbm_client_connect_request *) &dev->wr_msg_buf[1];
+ heci_cli_connect->host_addr = file_ext->host_client_id;
+ heci_cli_connect->me_addr = file_ext->me_client_id;
+ heci_cli_connect->cmd.cmd = CLIENT_CONNECT_REQ_CMD;
+ heci_cli_connect->reserved = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_connect,
+ sizeof(struct hbm_client_connect_request)))
+ return 0;
+
+ return 1;
+}
diff --git a/drivers/char/heci/heci_interface.h b/drivers/char/heci/heci_interface.h
new file mode 100644
index 0000000..37336eb
--- /dev/null
+++ b/drivers/char/heci/heci_interface.h
@@ -0,0 +1,170 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#ifndef _HECI_INTERFACE_H_
+#define _HECI_INTERFACE_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+
+#define HBM_MINOR_VERSION 0
+#define HBM_MAJOR_VERSION 1
+#define HBM_TIMEOUT 1 /* 1 second */
+
+
+#define HOST_START_REQ_CMD 0x01
+#define HOST_START_RES_CMD 0x81
+
+#define HOST_STOP_REQ_CMD 0x02
+#define HOST_STOP_RES_CMD 0x82
+
+#define ME_STOP_REQ_CMD 0x03
+
+#define HOST_ENUM_REQ_CMD 0x04
+#define HOST_ENUM_RES_CMD 0x84
+
+#define HOST_CLIENT_PROPERTEIS_REQ_CMD 0x05
+#define HOST_CLIENT_PROPERTEIS_RES_CMD 0x85
+
+#define CLIENT_CONNECT_REQ_CMD 0x06
+#define CLIENT_CONNECT_RES_CMD 0x86
+
+#define CLIENT_DISCONNECT_REQ_CMD 0x07
+#define CLIENT_DISCONNECT_RES_CMD 0x87
+
+#define HECI_FLOW_CONTROL_CMD 0x08
+
+
+#define AMT_WD_VALUE 120 /* seconds */
+
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+
+/* IOCTL commands */
+#define IOCTL_HECI_GET_VERSION \
+ _IOWR('H' , 0x0, struct heci_message_data)
+#define IOCTL_HECI_CONNECT_CLIENT \
+ _IOWR('H' , 0x01, struct heci_message_data)
+#define IOCTL_HECI_WD \
+ _IOWR('H' , 0x02, struct heci_message_data)
+#define IOCTL_HECI_BYPASS_WD \
+ _IOWR('H' , 0x10, struct heci_message_data)
+
+enum heci_stop_reason_types{
+ DRIVER_STOP_REQUEST = 0x00,
+ DEVICE_D1_ENTRY = 0x01,
+ DEVICE_D2_ENTRY = 0x02,
+ DEVICE_D3_ENTRY = 0x03,
+ SYSTEM_S1_ENTRY = 0x04,
+ SYSTEM_S2_ENTRY = 0x05,
+ SYSTEM_S3_ENTRY = 0x06,
+ SYSTEM_S4_ENTRY = 0x07,
+ SYSTEM_S5_ENTRY = 0x08
+};
+
+enum me_stop_reason_types{
+ FW_UPDATE = 0x00
+};
+
+enum client_connect_status_types{
+ CCS_SUCCESS = 0x00,
+ CCS_NOT_FOUND = 0x01,
+ CCS_ALREADY_STARTED = 0x02,
+ CCS_OUT_OF_RESOURCES = 0x03,
+ CCS_MESSAGE_SMALL = 0x04
+};
+
+enum client_disconnect_status_types{
+ CDS_SUCCESS = 0x00
+};
+
+
+/*
+ * heci interface function prototypes
+ */
+void heci_set_csr_register(struct iamt_heci_device *dev);
+void heci_csr_enable_interrupts(struct iamt_heci_device *dev);
+void heci_csr_disable_interrupts(struct iamt_heci_device *dev);
+
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length);
+
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length);
+
+int host_buffer_is_empty(struct iamt_heci_device *dev);
+
+__s32 count_full_read_slots(struct iamt_heci_device *dev);
+
+__s32 count_empty_write_slots(const struct iamt_heci_device *dev);
+
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_wd(struct iamt_heci_device *dev);
+
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+#endif /* _HECI_INTERFACE_H_ */
diff --git a/drivers/char/heci/heci_main.c b/drivers/char/heci/heci_main.c
new file mode 100644
index 0000000..c587c94
--- /dev/null
+++ b/drivers/char/heci/heci_main.c
@@ -0,0 +1,1563 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/device.h>
+#include <linux/unistd.h>
+#include <linux/kthread.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+#define HECI_READ_TIMEOUT 45
+
+#define HECI_DRIVER_NAME "heci"
+
+/*
+ * heci driver strings
+ */
+char heci_driver_name[] = HECI_DRIVER_NAME;
+char heci_driver_string[] = "Intel(R) Management Engine Interface";
+char heci_driver_version[] = HECI_DRIVER_VERSION;
+char heci_copyright[] = "Copyright (c) 2003 - 2008 Intel Corporation.";
+
+
+#ifdef HECI_DEBUG
+int heci_debug = 1;
+#else
+int heci_debug;
+#endif
+MODULE_PARM_DESC(heci_debug, "Debug enabled or not");
+module_param(heci_debug, int, 0644);
+
+
+#define HECI_DEV_NAME "heci"
+
+/* heci char device for registration */
+static struct cdev heci_cdev;
+
+/* major number for device */
+static int heci_major;
+/* The device pointer */
+static struct pci_dev *heci_device;
+
+struct class *heci_class;
+struct device *heci_dev;
+
+
+/* heci_pci_tbl - PCI Device ID Table */
+static struct pci_device_id heci_pci_tbl[] = {
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82946GZ)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82Q965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GM965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GME965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82G33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82X38)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_3200)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_6)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_7)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_8)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_9)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_10)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_4)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_4)},
+ /* required last entry */
+ {0, }
+};
+
+MODULE_DEVICE_TABLE(pci, heci_pci_tbl);
+
+/*
+ * Local Function Prototypes
+ */
+static int __init heci_init_module(void);
+static void __exit heci_exit_module(void);
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent);
+static void __devexit heci_remove(struct pci_dev *pdev);
+static int heci_open(struct inode *inode, struct file *file);
+static int heci_release(struct inode *inode, struct file *file);
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset);
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data);
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset);
+static unsigned int heci_poll(struct file *file, poll_table *wait);
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state);
+static int heci_resume(struct pci_dev *pdev);
+static __u16 g_sus_wd_timeout;
+#else
+#define heci_suspend NULL
+#define heci_resume NULL
+#endif
+/*
+ * PCI driver structure
+ */
+static struct pci_driver heci_driver = {
+ .name = heci_driver_name,
+ .id_table = heci_pci_tbl,
+ .probe = heci_probe,
+ .remove = __devexit_p(heci_remove),
+ .shutdown = __devexit_p(heci_remove),
+ .suspend = heci_suspend,
+ .resume = heci_resume
+};
+
+/*
+ * file operations structure will be use heci char device.
+ */
+static struct file_operations heci_fops = {
+ .owner = THIS_MODULE,
+ .read = heci_read,
+ .ioctl = heci_ioctl,
+ .open = heci_open,
+ .release = heci_release,
+ .write = heci_write,
+ .poll = heci_poll,
+};
+
+/**
+ * heci_registration_cdev - set up the cdev structure for heci device.
+ *
+ * @dev: char device struct
+ * @hminor: minor number for registration char device
+ * @fops: file operations structure
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_registration_cdev(struct cdev *dev, int hminor,
+ struct file_operations *fops)
+{
+ int ret, devno = MKDEV(heci_major, hminor);
+
+ cdev_init(dev, fops);
+ dev->owner = THIS_MODULE;
+ ret = cdev_add(dev, devno, 1);
+ /* Fail gracefully if need be */
+ if (ret) {
+ printk(KERN_ERR "heci: Error %d registering heci device %d\n",
+ ret, hminor);
+ }
+ return ret;
+}
+
+/* Display the version of heci driver. */
+static ssize_t version_show(struct class *dev, char *buf)
+{
+ return sprintf(buf, "%s %s.\n",
+ heci_driver_string, heci_driver_version);
+}
+
+static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
+
+/**
+ * heci_register_cdev - registers heci char device
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_register_cdev(void)
+{
+ int ret;
+ dev_t dev;
+
+ /* registration of char devices */
+ ret = alloc_chrdev_region(&dev, HECI_MINORS_BASE, HECI_MINORS_COUNT,
+ HECI_DRIVER_NAME);
+ if (ret) {
+ printk(KERN_ERR "heci: Error allocating char device region.\n");
+ return ret;
+ }
+
+ heci_major = MAJOR(dev);
+
+ ret = heci_registration_cdev(&heci_cdev, HECI_MINOR_NUMBER,
+ &heci_fops);
+ if (ret)
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+
+ return ret;
+}
+
+/**
+ * heci_unregister_cdev - unregisters heci char device
+ */
+static void heci_unregister_cdev(void)
+{
+ cdev_del(&heci_cdev);
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+}
+
+/**
+ * heci_sysfs_device_create - adds device entry to sysfs
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_sysfs_device_create(void)
+{
+ struct class *class;
+ struct device *tmphdev;
+ int err = 0;
+
+ class = class_create(THIS_MODULE, HECI_DRIVER_NAME);
+ if (IS_ERR(class)) {
+ err = PTR_ERR(class);
+ printk(KERN_ERR "heci: Error creating heci class.\n");
+ goto err_out;
+ }
+
+ err = class_create_file(class, &class_attr_version);
+ if (err) {
+ class_destroy(class);
+ printk(KERN_ERR "heci: Error creating heci class file.\n");
+ goto err_out;
+ }
+
+ tmphdev = device_create(class, NULL, heci_cdev.dev, NULL,
+ HECI_DEV_NAME);
+ if (IS_ERR(tmphdev)) {
+ err = PTR_ERR(tmphdev);
+ class_remove_file(class, &class_attr_version);
+ class_destroy(class);
+ goto err_out;
+ }
+
+ heci_dev = tmphdev;
+ heci_class = class;
+err_out:
+ return err;
+}
+
+/**
+ * heci_sysfs_device_remove - unregisters the device entry on sysfs
+ */
+static void heci_sysfs_device_remove(void)
+{
+ if ((heci_class == NULL) || (IS_ERR(heci_class)))
+ return;
+
+ heci_dev = NULL;
+ device_destroy(heci_class, heci_cdev.dev);
+ class_remove_file(heci_class, &class_attr_version);
+ class_destroy(heci_class);
+}
+
+/**
+ * heci_init_module - Driver Registration Routine
+ *
+ * heci_init_module is the first routine called when the driver is
+ * loaded. All it does is register with the PCI subsystem.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int __init heci_init_module(void)
+{
+ int ret = 0;
+
+ printk(KERN_INFO "heci: %s - version %s\n", heci_driver_string,
+ heci_driver_version);
+ printk(KERN_INFO "heci: %s\n", heci_copyright);
+
+ /* init pci module */
+ ret = pci_register_driver(&heci_driver);
+ if (ret < 0) {
+ printk(KERN_ERR "heci: Error registering driver.\n");
+ goto end;
+ }
+
+ ret = heci_register_cdev();
+ if (ret)
+ goto unregister_pci;
+
+ ret = heci_sysfs_device_create();
+ if (ret)
+ goto unregister_cdev;
+
+ return ret;
+
+unregister_cdev:
+ heci_unregister_cdev();
+unregister_pci:
+ pci_unregister_driver(&heci_driver);
+end:
+ return ret;
+}
+
+module_init(heci_init_module);
+
+
+/**
+ * heci_exit_module - Driver Exit Cleanup Routine
+ *
+ * heci_exit_module is called just before the driver is removed
+ * from memory.
+ */
+static void __exit heci_exit_module(void)
+{
+ pci_unregister_driver(&heci_driver);
+ heci_sysfs_device_remove();
+ heci_unregister_cdev();
+}
+
+module_exit(heci_exit_module);
+
+
+/**
+ * heci_probe - Device Initialization Routine
+ *
+ * @pdev: PCI device information struct
+ * @ent: entry in kcs_pci_tbl
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct iamt_heci_device *dev = NULL;
+ int i, err = 0;
+
+ if (heci_device) {
+ err = -EEXIST;
+ goto end;
+ }
+ /* enable pci dev */
+ err = pci_enable_device(pdev);
+ if (err) {
+ printk(KERN_ERR "heci: Failed to enable pci device.\n");
+ goto end;
+ }
+ /* set PCI host mastering */
+ pci_set_master(pdev);
+ /* pci request regions for heci driver */
+ err = pci_request_regions(pdev, heci_driver_name);
+ if (err) {
+ printk(KERN_ERR "heci: Failed to get pci regions.\n");
+ goto disable_device;
+ }
+ /* allocates and initializes the heci dev structure */
+ dev = init_heci_device(pdev);
+ if (!dev) {
+ err = -ENOMEM;
+ goto release_regions;
+ }
+ /* mapping IO device memory */
+ for (i = 0; i <= 5; i++) {
+ if (pci_resource_len(pdev, i) == 0)
+ continue;
+ if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
+ printk(KERN_ERR "heci: heci has IO ports.\n");
+ goto free_device;
+ } else if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
+ if (dev->mem_base) {
+ printk(KERN_ERR
+ "heci: Too many mem addresses.\n");
+ goto free_device;
+ }
+ dev->mem_base = pci_resource_start(pdev, i);
+ dev->mem_length = pci_resource_len(pdev, i);
+ }
+ }
+ if (!dev->mem_base) {
+ printk(KERN_ERR "heci: No address to use.\n");
+ err = -ENODEV;
+ goto free_device;
+ }
+ dev->mem_addr = ioremap_nocache(dev->mem_base,
+ dev->mem_length);
+ if (!dev->mem_addr) {
+ printk(KERN_ERR "heci: Remap IO device memory failure.\n");
+ err = -ENOMEM;
+ goto free_device;
+ }
+ /* request and enable interrupt */
+ err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, dev);
+ if (err) {
+ printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
+ pdev->irq);
+ goto unmap_memory;
+ }
+
+ if (heci_hw_init(dev)) {
+ printk(KERN_ERR "heci: Init hw failure.\n");
+ err = -ENODEV;
+ goto release_irq;
+ }
+ init_timer(&dev->wd_timer);
+
+ heci_initialize_clients(dev);
+ if (dev->heci_state != HECI_ENABLED) {
+ err = -ENODEV;
+ goto release_hw;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ heci_device = pdev;
+ pci_set_drvdata(pdev, dev);
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->wd_timeout)
+ mod_timer(&dev->wd_timer, jiffies);
+
+#ifdef CONFIG_PM
+ g_sus_wd_timeout = 0;
+#endif
+ printk(KERN_INFO "heci driver initialization successful.\n");
+ return 0;
+
+release_hw:
+ /* disable interrupts */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ heci_csr_disable_interrupts(dev);
+
+ del_timer_sync(&dev->wd_timer);
+
+ flush_scheduled_work();
+
+release_irq:
+ free_irq(pdev->irq, dev);
+unmap_memory:
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+free_device:
+ kfree(dev);
+release_regions:
+ pci_release_regions(pdev);
+disable_device:
+ pci_disable_device(pdev);
+end:
+ printk(KERN_ERR "heci driver initialization failed.\n");
+ return err;
+}
+
+/**
+ * heci_remove - Device Removal Routine
+ *
+ * @pdev: PCI device information struct
+ *
+ * heci_remove is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.
+ */
+static void __devexit heci_remove(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *dev = pci_get_drvdata(pdev);
+
+ if (heci_device != pdev)
+ return;
+
+ if (dev == NULL)
+ return;
+
+ spin_lock_bh(&dev->device_lock);
+ if (heci_device != pdev) {
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+
+ del_timer_sync(&dev->wd_timer);
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
+ && dev->wd_timeout) {
+ dev->wd_timeout = 0;
+ dev->wd_due_counter = 0;
+ memcpy(dev->wd_data, heci_stop_wd_params, HECI_WD_PARAMS_SIZE);
+ dev->stop = 1;
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+
+ if (!heci_send_wd(dev))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+ } else {
+ dev->wd_pending = 1;
+ }
+ dev->wd_stoped = 0;
+ spin_unlock_bh(&dev->device_lock);
+
+ wait_event_interruptible_timeout(dev->wait_stop_wd,
+ (dev->wd_stoped), 10 * HZ);
+ spin_lock_bh(&dev->device_lock);
+ if (!dev->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else
+ DBG("stop wd complete.\n");
+
+ }
+
+ heci_device = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->iamthif_file_ext.state == HECI_FILE_CONNECTED) {
+ dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->iamthif_file_ext);
+ }
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED) {
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->wd_file_ext);
+ }
+
+ spin_lock_bh(&dev->device_lock);
+
+ /* remove entry if already in list */
+ DBG("list del iamthif and wd file list.\n");
+ heci_remove_client_from_file_list(dev, dev->wd_file_ext.
+ host_client_id);
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+
+ dev->iamthif_current_cb = NULL;
+ dev->iamthif_file_ext.file = NULL;
+ dev->num_heci_me_clients = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ flush_scheduled_work();
+
+ /* disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ free_irq(pdev->irq, dev);
+ pci_set_drvdata(pdev, NULL);
+
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+
+ kfree(dev);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+}
+
+/**
+ * heci_clear_list - remove all callbacks associated with file
+ * from heci_cb_list
+ *
+ * @file: file information struct
+ * @heci_cb_list: callbacks list
+ *
+ * heci_clear_list is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * returns 1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_list(struct iamt_heci_device *dev,
+ struct file *file, struct list_head *heci_cb_list)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private*priv_cb_next = NULL;
+ struct file *file_temp;
+ int rets = 0;
+
+ /* list all list member */
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ heci_cb_list, cb_list) {
+ file_temp = (struct file *)priv_cb_pos->file_object;
+ /* check if list member associated with a file */
+ if (file_temp == file) {
+ /* remove member from the list */
+ list_del(&priv_cb_pos->cb_list);
+ /* check if cb equal to current iamthif cb */
+ if (dev->iamthif_current_cb == priv_cb_pos) {
+ dev->iamthif_current_cb = NULL;
+ /* send flow control to iamthif client */
+ heci_send_flow_control(dev,
+ &dev->iamthif_file_ext);
+ }
+ /* free all allocated buffers */
+ heci_free_cb_private(priv_cb_pos);
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_clear_lists - remove all callbacks associated with file
+ *
+ * @dev: device information struct
+ * @file: file information struct
+ *
+ * heci_clear_lists is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * returns 1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_lists(struct iamt_heci_device *dev, struct file *file)
+{
+ int rets = 0;
+
+ /* remove callbacks associated with a file */
+ heci_clear_list(dev, file, &dev->pthi_cmd_list.heci_cb.cb_list);
+ if (heci_clear_list(dev, file,
+ &dev->pthi_read_complete_list.heci_cb.cb_list))
+ rets = 1;
+
+ heci_clear_list(dev, file, &dev->ctrl_rd_list.heci_cb.cb_list);
+
+ if (heci_clear_list(dev, file, &dev->ctrl_wr_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file,
+ &dev->write_waiting_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file, &dev->write_list.heci_cb.cb_list))
+ rets = 1;
+
+ /* check if iamthif_current_cb not NULL */
+ if (dev->iamthif_current_cb && (!rets)) {
+ /* check file and iamthif current cb association */
+ if (dev->iamthif_current_cb->file_object == file) {
+ /* remove cb */
+ heci_free_cb_private(dev->iamthif_current_cb);
+ dev->iamthif_current_cb = NULL;
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_open - the open function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ *
+ * returns 0 on success, <0 on error
+ */
+static int heci_open(struct inode *inode, struct file *file)
+{
+ struct heci_file_private *file_ext;
+ int if_num = iminor(inode);
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ file_ext = heci_alloc_file_private(file);
+ if (file_ext == NULL)
+ return -ENOMEM;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENODEV;
+ }
+ if (dev->open_handle_count >= HECI_MAX_OPEN_HANDLE_COUNT) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENFILE;
+ };
+ dev->open_handle_count++;
+ list_add_tail(&file_ext->link, &dev->file_list);
+ while ((dev->heci_host_clients[dev->current_host_client_id / 8]
+ & (1 << (dev->current_host_client_id % 8))) != 0) {
+
+ dev->current_host_client_id++; /* allow overflow */
+ DBG("current_host_client_id = %d\n",
+ dev->current_host_client_id);
+ DBG("dev->open_handle_count = %lu\n",
+ dev->open_handle_count);
+ }
+ DBG("current_host_client_id = %d\n", dev->current_host_client_id);
+ file_ext->host_client_id = dev->current_host_client_id;
+ dev->heci_host_clients[file_ext->host_client_id / 8] |=
+ (1 << (file_ext->host_client_id % 8));
+ spin_unlock_bh(&dev->device_lock);
+ spin_lock(&file_ext->file_lock);
+ file_ext->state = HECI_FILE_INITIALIZING;
+ file_ext->sm_state = 0;
+
+ file->private_data = file_ext;
+ spin_unlock(&file_ext->file_lock);
+
+ return 0;
+}
+
+/**
+ * heci_release - the release function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ *
+ * returns 0 on success, <0 on error
+ */
+static int heci_release(struct inode *inode, struct file *file)
+{
+ int rets = 0;
+ int if_num = iminor(inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext != &dev->iamthif_file_ext) {
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state == HECI_FILE_CONNECTED) {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ spin_unlock(&file_ext->file_lock);
+ DBG("disconnecting client host client = %d, "
+ "ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+ rets = heci_disconnect_host_client(dev, file_ext);
+ spin_lock(&file_ext->file_lock);
+ }
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_queues(dev, file_ext);
+ DBG("remove client host client = %d, ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ if (dev->open_handle_count > 0) {
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ dev->open_handle_count--;
+ }
+ heci_remove_client_from_file_list(dev,
+ file_ext->host_client_id);
+
+ /* free read cb */
+ if (file_ext->read_cb != NULL) {
+ priv_cb = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb != NULL)
+ list_del(&priv_cb->cb_list);
+
+ priv_cb = file_ext->read_cb;
+ file_ext->read_cb = NULL;
+ }
+
+ spin_unlock_bh(&dev->device_lock);
+ file->private_data = NULL;
+ spin_unlock(&file_ext->file_lock);
+
+ if (priv_cb != NULL)
+ heci_free_cb_private(priv_cb);
+
+ kfree(file_ext);
+ } else {
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->open_handle_count > 0)
+ dev->open_handle_count--;
+
+ if (dev->iamthif_file_object == file
+ && dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi canceled iamthif state %d\n",
+ dev->iamthif_state);
+ dev->iamthif_canceled = 1;
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE) {
+ DBG("run next pthi iamthif cb\n");
+ run_next_iamthif_cmd(dev);
+ }
+ }
+
+ if (heci_clear_lists(dev, file))
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+
+ spin_unlock_bh(&dev->device_lock);
+ }
+ return rets;
+}
+
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ struct heci_file_private *file_ext_list_temp;
+
+ if (dev->read_list.status == 0
+ && !list_empty(&dev->read_list.heci_cb.cb_list)) {
+ DBG("remove read_list CB \n");
+ list_for_each_entry_safe(priv_cb_pos,
+ priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+
+ file_ext_list_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext_list_temp != NULL) &&
+ heci_fe_same_id(file_ext, file_ext_list_temp))
+ return priv_cb_pos;
+
+ }
+ }
+ return NULL;
+}
+
+/**
+ * heci_read - the read client message function.
+ *
+ * @file: pointer to file structure
+ * @ubuf: pointer to user buffer
+ * @length: buffer length
+ * @offset: data offset in buffer
+ *
+ * returns >=0 data length on success , <0 on error
+ */
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int i;
+ int rets = 0, err = 0;
+ int if_num = iminor(file->f_dentry->d_inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ spin_lock(&file_ext->file_lock);
+ if ((file_ext->sm_state & HECI_WD_STATE_INDEPENDENCE_MSG_SENT) == 0) {
+ spin_unlock(&file_ext->file_lock);
+ /* Do not allow to read watchdog client */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_wd_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (file_ext->me_client_id ==
+ dev->me_clients[i].client_id)
+ return -EBADF;
+ }
+ }
+ } else {
+ file_ext->sm_state &= ~HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+ }
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ rets = pthi_read(dev, if_num, file, ubuf, length, offset);
+ goto out;
+ }
+
+ if (file_ext->read_cb && file_ext->read_cb->information > *offset) {
+ priv_cb = file_ext->read_cb;
+ goto copy_buffer;
+ } else if (file_ext->read_cb && file_ext->read_cb->information > 0 &&
+ file_ext->read_cb->information <= *offset) {
+ priv_cb = file_ext->read_cb;
+ rets = 0;
+ goto free;
+ } else if ((!file_ext->read_cb || file_ext->read_cb->information == 0)
+ && *offset > 0) {
+ /*Offset needs to be cleaned for contingous reads*/
+ *offset = 0;
+ rets = 0;
+ goto out;
+ }
+
+ spin_lock(&file_ext->read_io_lock);
+ err = heci_start_read(dev, if_num, file_ext);
+ if (err != 0 && err != -EBUSY) {
+ DBG("heci start read failure with status = %d\n", err);
+ spin_unlock(&file_ext->read_io_lock);
+ rets = err;
+ goto out;
+ }
+ if (HECI_READ_COMPLETE != file_ext->reading_state
+ && !waitqueue_active(&file_ext->rx_wait)) {
+ if (file->f_flags & O_NONBLOCK) {
+ rets = -EAGAIN;
+ spin_unlock(&file_ext->read_io_lock);
+ goto out;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+
+ if (wait_event_interruptible(file_ext->rx_wait,
+ (HECI_READ_COMPLETE == file_ext->reading_state
+ || HECI_FILE_INITIALIZING == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTING == file_ext->state))) {
+ if (signal_pending(current)) {
+ rets = -EINTR;
+ goto out;
+ }
+ return -ERESTARTSYS;
+ }
+
+ if (HECI_FILE_INITIALIZING == file_ext->state ||
+ HECI_FILE_DISCONNECTED == file_ext->state ||
+ HECI_FILE_DISCONNECTING == file_ext->state) {
+ rets = -EBUSY;
+ goto out;
+ }
+ spin_lock(&file_ext->read_io_lock);
+ }
+
+ priv_cb = file_ext->read_cb;
+
+ if (!priv_cb) {
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENODEV;
+ }
+ if (file_ext->reading_state != HECI_READ_COMPLETE) {
+ spin_unlock(&file_ext->read_io_lock);
+ return 0;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+ /* now copy the data to user space */
+copy_buffer:
+ DBG("priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("priv_cb->information - %lu\n",
+ priv_cb->information);
+ if (length == 0 || ubuf == NULL ||
+ *offset > priv_cb->information) {
+ rets = -EMSGSIZE;
+ goto free;
+ }
+
+ /* length is being turncated to PAGE_SIZE, however, */
+ /* information size may be longer */
+ length = (length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset));
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length)) {
+ rets = -EFAULT;
+ goto free;
+ }
+
+ rets = length;
+ *offset += length;
+ if ((unsigned long)*offset < priv_cb->information)
+ goto out;
+
+free:
+ spin_lock_bh(&dev->device_lock);
+ priv_cb_pos = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb_pos != NULL)
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_cb);
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+out: DBG("end heci read rets= %d\n", rets);
+ return rets;
+}
+
+/**
+ * heci_write - the write function.
+ *
+ * @file: pointer to file structure
+ * @ubuf: pointer to user buffer
+ * @length: buffer length
+ * @offset: data offset in buffer
+ *
+ * returns >=0 data length on success , <0 on error
+ */
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int rets = 0;
+ __u8 i;
+ int if_num = iminor(file->f_dentry->d_inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_write_cb = NULL;
+ struct heci_msg_hdr heci_hdr;
+ struct iamt_heci_device *dev;
+ unsigned long currtime = get_seconds();
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb = find_pthi_read_list_entry(dev, file);
+ if ((priv_write_cb != NULL) &&
+ (((currtime - priv_write_cb->read_time) >
+ IAMTHIF_READ_TIMER) ||
+ (file_ext->reading_state == HECI_READ_COMPLETE))) {
+ (*offset) = 0;
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ priv_write_cb = NULL;
+ }
+ }
+
+ /* free entry used in read */
+ if (file_ext->reading_state == HECI_READ_COMPLETE) {
+ *offset = 0;
+ priv_write_cb = find_read_list_entry(dev, file_ext);
+ if (priv_write_cb != NULL) {
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ priv_write_cb = NULL;
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+ }
+ } else if (file_ext->reading_state == HECI_IDLE &&
+ file_ext->read_pending == 0)
+ (*offset) = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ priv_write_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_write_cb)
+ return -ENOMEM;
+
+ priv_write_cb->file_object = file;
+ priv_write_cb->file_private = file_ext;
+ priv_write_cb->request_buffer.data = kmalloc(length, GFP_KERNEL);
+ if (!priv_write_cb->request_buffer.data) {
+ kfree(priv_write_cb);
+ return -ENOMEM;
+ }
+ DBG("length =%d\n", (int) length);
+
+ if (copy_from_user(priv_write_cb->request_buffer.data,
+ ubuf, length)) {
+ rets = -EFAULT;
+ goto fail;
+ }
+
+ spin_lock(&file_ext->file_lock);
+ file_ext->sm_state = 0;
+ if ((length == 4) &&
+ ((memcmp(heci_wd_state_independence_msg[0], ubuf, 4) == 0) ||
+ (memcmp(heci_wd_state_independence_msg[1], ubuf, 4) == 0) ||
+ (memcmp(heci_wd_state_independence_msg[2], ubuf, 4) == 0)))
+ file_ext->sm_state |= HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+
+ INIT_LIST_HEAD(&priv_write_cb->cb_list);
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb->response_buffer.data =
+ kmalloc(IAMTHIF_MTU, GFP_KERNEL);
+ if (!priv_write_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->iamthif_file_ext.me_client_id)
+ break;
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients) ||
+ (dev->me_clients[i].client_id !=
+ dev->iamthif_file_ext.me_client_id)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ } else if ((length > dev->me_clients[i].props.max_msg_length)
+ || (length <= 0)) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -EMSGSIZE;
+ goto fail;
+ }
+
+
+ priv_write_cb->response_buffer.size = IAMTHIF_MTU;
+ priv_write_cb->major_file_operations = HECI_IOCTL;
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+
+ if (!list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)
+ || dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi_state = %d\n", (int) dev->iamthif_state);
+ DBG("add PTHI cb to pthi cmd waiting list\n");
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->pthi_cmd_list.heci_cb.cb_list);
+ rets = length;
+ } else {
+ DBG("call pthi write\n");
+ rets = pthi_write(dev, priv_write_cb);
+
+ if (rets != 0) {
+ DBG("pthi write failed with status = %d\n",
+ rets);
+ spin_unlock_bh(&dev->device_lock);
+ goto fail;
+ }
+ rets = length;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+ }
+
+ priv_write_cb->major_file_operations = HECI_WRITE;
+ /* make sure information is zero before we start */
+
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+
+ spin_lock(&file_ext->write_io_lock);
+ DBG("host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (file_ext->state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ DBG("host client = %d, is not connected to ME client = %d",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ goto unlock;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ file_ext->me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if (i == dev->num_heci_me_clients) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+ if (length > dev->me_clients[i].props.max_msg_length || length <= 0) {
+ rets = -EINVAL;
+ goto unlock;
+ }
+ priv_write_cb->file_private = file_ext;
+
+ spin_lock_bh(&dev->device_lock);
+ if (flow_ctrl_creds(dev, file_ext) &&
+ dev->host_buffer_is_empty) {
+ spin_unlock_bh(&dev->device_lock);
+ dev->host_buffer_is_empty = 0;
+ if (length > ((((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr))) {
+
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) -
+ sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = length;
+ heci_hdr.msg_complete = 1;
+ }
+ heci_hdr.host_addr = file_ext->host_client_id;
+ heci_hdr.me_addr = file_ext->me_client_id;
+ heci_hdr.reserved = 0;
+ DBG("call heci_write_message header=%08x.\n",
+ *((__u32 *) &heci_hdr));
+ spin_unlock(&file_ext->write_io_lock);
+ /* protect heci low level write */
+ spin_lock_bh(&dev->device_lock);
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *) (priv_write_cb->request_buffer.data),
+ heci_hdr.length)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_write_cb);
+ rets = -ENODEV;
+ priv_write_cb->information = 0;
+ return rets;
+ }
+ file_ext->writing_state = HECI_WRITING;
+ priv_write_cb->information = heci_hdr.length;
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, file_ext);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ } else {
+
+ spin_unlock_bh(&dev->device_lock);
+ priv_write_cb->information = 0;
+ file_ext->writing_state = HECI_WRITING;
+ spin_unlock(&file_ext->write_io_lock);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return length;
+
+unlock:
+ spin_unlock(&file_ext->write_io_lock);
+fail:
+ heci_free_cb_private(priv_write_cb);
+ return rets;
+
+}
+
+/**
+ * heci_ioctl - the IOCTL function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ * @cmd: ioctl command
+ * @data: pointer to heci message structure
+ *
+ * returns 0 on success , <0 on error
+ */
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data)
+{
+ int rets = 0;
+ int if_num = iminor(inode);
+ struct heci_file_private *file_ext = file->private_data;
+ /* in user space */
+ struct heci_message_data *u_msg = (struct heci_message_data *) data;
+ struct heci_message_data k_msg; /* all in kernel on the stack */
+ struct iamt_heci_device *dev;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ /* first copy from user all data needed */
+ if (copy_from_user(&k_msg, u_msg, sizeof(k_msg))) {
+ DBG("first copy from user all data needed filled\n");
+ return -EFAULT;
+ }
+ DBG("user message size is %d\n", k_msg.size);
+
+ switch (cmd) {
+ case IOCTL_HECI_GET_VERSION:
+ DBG(": IOCTL_HECI_GET_VERSION\n");
+ rets = heci_ioctl_get_version(dev, if_num, u_msg, k_msg,
+ file_ext);
+ break;
+
+ case IOCTL_HECI_CONNECT_CLIENT:
+ DBG(": IOCTL_HECI_CONNECT_CLIENT.\n");
+ rets = heci_ioctl_connect_client(dev, if_num, u_msg, k_msg,
+ file);
+ break;
+
+ case IOCTL_HECI_WD:
+ DBG(": IOCTL_HECI_WD.\n");
+ rets = heci_ioctl_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ case IOCTL_HECI_BYPASS_WD:
+ DBG(": IOCTL_HECI_BYPASS_WD.\n");
+ rets = heci_ioctl_bypass_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ default:
+ rets = -EINVAL;
+ break;
+ }
+ return rets;
+}
+
+/**
+ * heci_poll - the poll function
+ *
+ * @file: pointer to file structure
+ * @wait: pointer to poll_table structure
+ *
+ * returns poll mask
+ */
+static unsigned int heci_poll(struct file *file, poll_table *wait)
+{
+ int if_num = iminor(file->f_dentry->d_inode);
+ unsigned int mask = 0;
+ struct heci_file_private *file_ext = file->private_data;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return mask;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return mask;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return mask;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ poll_wait(file, &dev->iamthif_file_ext.wait, wait);
+ spin_lock(&dev->iamthif_file_ext.file_lock);
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE
+ && dev->iamthif_file_object == file) {
+ mask |= (POLLIN | POLLRDNORM);
+ spin_lock_bh(&dev->device_lock);
+ DBG("run next pthi cb\n");
+ run_next_iamthif_cmd(dev);
+ spin_unlock_bh(&dev->device_lock);
+ }
+ spin_unlock(&dev->iamthif_file_ext.file_lock);
+
+ } else{
+ poll_wait(file, &file_ext->tx_wait, wait);
+ spin_lock(&file_ext->write_io_lock);
+ if (HECI_WRITE_COMPLETE == file_ext->writing_state)
+ mask |= (POLLIN | POLLRDNORM);
+
+ spin_unlock(&file_ext->write_io_lock);
+ }
+
+ return mask;
+}
+
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct iamt_heci_device *dev = pci_get_drvdata(pdev);
+ int err = 0;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ /* Stop watchdog if exists */
+ del_timer_sync(&dev->wd_timer);
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
+ && dev->wd_timeout) {
+ spin_lock_bh(&dev->device_lock);
+ g_sus_wd_timeout = dev->wd_timeout;
+ dev->wd_timeout = 0;
+ dev->wd_due_counter = 0;
+ memcpy(dev->wd_data, heci_stop_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ dev->stop = 1;
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_wd(dev))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+ } else {
+ dev->wd_pending = 1;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ dev->wd_stoped = 0;
+
+ err = wait_event_interruptible_timeout(dev->wait_stop_wd,
+ (dev->wd_stoped),
+ 10 * HZ);
+ if (!dev->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else {
+ DBG("stop wd complete %d.\n", err);
+ err = 0;
+ }
+ }
+ /* Set new heci state */
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state == HECI_ENABLED ||
+ dev->heci_state == HECI_RECOVERING_FROM_RESET) {
+ dev->heci_state = HECI_POWER_DOWN;
+ heci_reset(dev, 0);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ pci_save_state(pdev);
+
+ pci_disable_device(pdev);
+ free_irq(pdev->irq, dev);
+
+ pci_set_power_state(pdev, PCI_D3hot);
+
+ return err;
+}
+
+static int heci_resume(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *dev;
+ int err = 0;
+
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+
+ dev = pci_get_drvdata(pdev);
+ if (!dev)
+ return -ENODEV;
+
+ /* request and enable interrupt */
+ err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, dev);
+ if (err) {
+ printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
+ pdev->irq);
+ return err;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_POWER_UP;
+ heci_reset(dev, 1);
+ spin_unlock_bh(&dev->device_lock);
+
+ /* Start watchdog if stopped in suspend */
+ if (g_sus_wd_timeout != 0) {
+ dev->wd_timeout = g_sus_wd_timeout;
+
+ memcpy(dev->wd_data, heci_start_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
+ &dev->wd_timeout, sizeof(__u16));
+ dev->wd_due_counter = 1;
+
+ if (dev->wd_timeout)
+ mod_timer(&dev->wd_timer, jiffies);
+
+ g_sus_wd_timeout = 0;
+ }
+ return err;
+}
+#endif
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(HECI_DRIVER_VERSION);
diff --git a/drivers/char/heci/heci_version.h b/drivers/char/heci/heci_version.h
new file mode 100644
index 0000000..797e84e
--- /dev/null
+++ b/drivers/char/heci/heci_version.h
@@ -0,0 +1,54 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef HECI_VERSION_H
+#define HECI_VERSION_H
+
+#define MAJOR_VERSION 5
+#define MINOR_VERSION 0
+#define QUICK_FIX_NUMBER 0
+#define VER_BUILD 30
+
+#define HECI_DRV_VER1 __stringify(MAJOR_VERSION) "." __stringify(MINOR_VERSION)
+#define HECI_DRV_VER2 __stringify(QUICK_FIX_NUMBER) "." __stringify(VER_BUILD)
+
+#define HECI_DRIVER_VERSION HECI_DRV_VER1 "." HECI_DRV_VER2
+
+#endif
diff --git a/drivers/char/heci/interrupt.c b/drivers/char/heci/interrupt.c
new file mode 100644
index 0000000..aacd262
--- /dev/null
+++ b/drivers/char/heci/interrupt.c
@@ -0,0 +1,1553 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/kthread.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+
+/*
+ * interrupt function prototypes
+ */
+static void heci_bh_handler(struct work_struct *work);
+static int heci_bh_read_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static int heci_bh_write_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *connect_res);
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *disconnect_res);
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control);
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req);
+
+
+/**
+ * heci_isr_interrupt - The ISR of the HECI device
+ *
+ * @irq: The irq number
+ * @dev_id: pointer to the device structure
+ *
+ * returns irqreturn_t
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id)
+{
+ int err;
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) dev_id;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+
+ if ((dev->host_hw_state & H_IS) != H_IS)
+ return IRQ_NONE;
+
+ /* disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ /*
+ * Our device interrupted, schedule work the heci_bh_handler
+ * to handle the interrupt processing. This needs to be a
+ * workqueue item since the handler can sleep.
+ */
+ PREPARE_WORK(&dev->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler.\n");
+ err = schedule_work(&dev->work);
+ if (!err) {
+ printk(KERN_ERR "heci: schedule the heci_bh_handler"
+ " failed error=%x\n", err);
+ }
+ return IRQ_HANDLED;
+}
+
+/**
+ * _heci_cmpl - process completed operation.
+ *
+ * @file_ext: private data of the file object.
+ * @priv_cb_pos: callback block.
+ */
+static void _heci_cmpl(struct heci_file_private *file_ext,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (priv_cb_pos->major_file_operations == HECI_WRITE) {
+ heci_free_cb_private(priv_cb_pos);
+ DBG("completing write call back.\n");
+ file_ext->writing_state = HECI_WRITE_COMPLETE;
+ if ((&file_ext->tx_wait) &&
+ waitqueue_active(&file_ext->tx_wait))
+ wake_up_interruptible(&file_ext->tx_wait);
+
+ } else if (priv_cb_pos->major_file_operations == HECI_READ
+ && HECI_READING == file_ext->reading_state) {
+ DBG("completing read call back information= %lu\n",
+ priv_cb_pos->information);
+ file_ext->reading_state = HECI_READ_COMPLETE;
+ if ((&file_ext->rx_wait) &&
+ waitqueue_active(&file_ext->rx_wait))
+ wake_up_interruptible(&file_ext->rx_wait);
+
+ }
+}
+
+/**
+ * _heci_cmpl_iamthif - process completed iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @priv_cb_pos: callback block.
+ */
+static void _heci_cmpl_iamthif(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (dev->iamthif_canceled != 1) {
+ dev->iamthif_state = HECI_IAMTHIF_READ_COMPLETE;
+ dev->iamthif_stall_timer = 0;
+ memcpy(priv_cb_pos->response_buffer.data,
+ dev->iamthif_msg_buf,
+ dev->iamthif_msg_buf_index);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->pthi_read_complete_list.heci_cb.cb_list);
+ DBG("pthi read completed.\n");
+ } else {
+ run_next_iamthif_cmd(dev);
+ }
+ if (&dev->iamthif_file_ext.wait) {
+ DBG("completing pthi call back.\n");
+ wake_up_interruptible(&dev->iamthif_file_ext.wait);
+ }
+}
+/**
+ * heci_bh_handler - function called after ISR to handle the interrupt
+ * processing.
+ *
+ * @work: pointer to the work structure
+ *
+ * NOTE: This function is called by schedule work
+ */
+static void heci_bh_handler(struct work_struct *work)
+{
+ struct iamt_heci_device *dev =
+ container_of(work, struct iamt_heci_device, work);
+ struct io_heci_list complete_list;
+ __s32 slots;
+ int rets;
+ struct heci_cb_private *cb_pos = NULL, *cb_next = NULL;
+ struct heci_file_private *file_ext;
+ int bus_message_received = 0;
+ struct task_struct *tsk;
+
+ DBG("function called after ISR to handle the interrupt processing.\n");
+ /* initialize our complete list */
+ spin_lock_bh(&dev->device_lock);
+ heci_initialize_list(&complete_list, dev);
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ /* check if ME wants a reset */
+ if (((dev->me_hw_state & ME_RDY_HRA) == 0)
+ && (dev->heci_state != HECI_RESETING)
+ && (dev->heci_state != HECI_INITIALIZING)) {
+ DBG("FW not ready.\n");
+ heci_reset(dev, 1);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ /* check if we need to start the dev */
+ if ((dev->host_hw_state & H_RDY) == 0) {
+ if ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA) {
+ DBG("we need to start the dev.\n");
+ dev->host_hw_state |= (H_IE | H_IG | H_RDY);
+ heci_set_csr_register(dev);
+ if (dev->heci_state == HECI_INITIALIZING) {
+ dev->recvd_msg = 1;
+ spin_unlock_bh(&dev->device_lock);
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ return;
+
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ tsk = kthread_run(heci_task_initialize_clients,
+ dev, "heci_reinit");
+ if (IS_ERR(tsk)) {
+ int rc = PTR_ERR(tsk);
+ printk(KERN_WARNING "heci: Unable to"
+ "start the heci thread: %d\n", rc);
+ }
+ return;
+ }
+ } else {
+ DBG("enable interrupt FW not ready.\n");
+ heci_csr_enable_interrupts(dev);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ }
+ /* check slots avalable for reading */
+ slots = count_full_read_slots(dev);
+ DBG("slots =%08x extra_write_index =%08x.\n",
+ slots, dev->extra_write_index);
+ while ((slots > 0) && (!dev->extra_write_index)) {
+ DBG("slots =%08x extra_write_index =%08x.\n", slots,
+ dev->extra_write_index);
+ DBG("call heci_bh_read_handler.\n");
+ rets = heci_bh_read_handler(&complete_list, dev, &slots);
+ if (rets != 0)
+ goto end;
+ }
+ rets = heci_bh_write_handler(&complete_list, dev, &slots);
+end:
+ DBG("end of bottom half function.\n");
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ /* acknowledge interrupt and disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ PREPARE_WORK(&dev->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler.\n");
+ rets = schedule_work(&dev->work);
+ if (!rets) {
+ printk(KERN_ERR "heci: schedule the heci_bh_handler"
+ " failed error=%x\n", rets);
+ }
+ } else {
+ heci_csr_enable_interrupts(dev);
+ }
+
+ if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) {
+ DBG("received waiting bus message\n");
+ bus_message_received = 1;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ if (bus_message_received) {
+ DBG("wake up dev->wait_recvd_msg\n");
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ bus_message_received = 0;
+ }
+ if ((complete_list.status != 0)
+ || list_empty(&complete_list.heci_cb.cb_list))
+ return;
+
+
+ list_for_each_entry_safe(cb_pos, cb_next,
+ &complete_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)cb_pos->file_private;
+ list_del(&cb_pos->cb_list);
+ if (file_ext != NULL) {
+ if (file_ext != &dev->iamthif_file_ext) {
+ DBG("completing call back.\n");
+ _heci_cmpl(file_ext, cb_pos);
+ cb_pos = NULL;
+ } else if (file_ext == &dev->iamthif_file_ext) {
+ _heci_cmpl_iamthif(dev, cb_pos);
+ }
+ }
+ }
+}
+
+
+/**
+ * heci_bh_read_handler - bottom half read routine after ISR to
+ * handle the read processing.
+ *
+ * @cmpl_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @slots: slots to read.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+ struct heci_msg_hdr *heci_hdr;
+ int ret = 0;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (!dev->rd_msg_hdr) {
+ dev->rd_msg_hdr = read_heci_register(dev, ME_CB_RW);
+ DBG("slots=%08x.\n", *slots);
+ (*slots)--;
+ DBG("slots=%08x.\n", *slots);
+ }
+ heci_hdr = (struct heci_msg_hdr *) &dev->rd_msg_hdr;
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+
+ if ((heci_hdr->reserved) || !(dev->rd_msg_hdr)) {
+ DBG("corrupted message header.\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+
+ if ((heci_hdr->host_addr) || (heci_hdr->me_addr)) {
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe read host"
+ " client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ if ((file_pos->host_client_id == heci_hdr->host_addr)
+ && (file_pos->me_client_id == heci_hdr->me_addr))
+ break;
+ }
+
+ if (&file_pos->link == &dev->file_list) {
+ DBG("corrupted message header\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+ }
+ if (((*slots) * sizeof(__u32)) < heci_hdr->length) {
+ DBG("we can't read the message slots=%08x.\n", *slots);
+ /* we can't read the message */
+ ret = -ERANGE;
+ goto end;
+ }
+
+ /* decide where to read the message too */
+ if (!heci_hdr->host_addr) {
+ DBG("call heci_bh_read_bus_message.\n");
+ heci_bh_read_bus_message(dev, heci_hdr);
+ DBG("end heci_bh_read_bus_message.\n");
+ } else if ((heci_hdr->host_addr == dev->iamthif_file_ext.host_client_id)
+ && (HECI_FILE_CONNECTED == dev->iamthif_file_ext.state)
+ && (dev->iamthif_state == HECI_IAMTHIF_READING)) {
+ DBG("call heci_bh_read_iamthif_message.\n");
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ ret = heci_bh_read_pthi_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ } else {
+ DBG("call heci_bh_read_client_message.\n");
+ ret = heci_bh_read_client_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ }
+
+ /* reset the number of slots and header */
+ *slots = count_full_read_slots(dev);
+ dev->rd_msg_hdr = 0;
+
+ if (*slots == -ESLOTS_OVERFLOW) {
+ /* overflow - reset */
+ DBG("reseting due to slots overflow.\n");
+ /* set the event since message has been read */
+ ret = -ERANGE;
+ goto end;
+ }
+end:
+ return ret;
+}
+
+
+/**
+ * heci_bh_read_bus_message - bottom half read routine after ISR to
+ * handle the read bus message cmd processing.
+ *
+ * @dev: Device object for our driver
+ * @heci_hdr: header of bus message
+ */
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_bus_message *heci_msg;
+ struct hbm_host_version_response *version_res;
+ struct hbm_client_connect_response *connect_res;
+ struct hbm_client_connect_response *disconnect_res;
+ struct hbm_flow_control *flow_control;
+ struct hbm_props_response *props_res;
+ struct hbm_host_enum_response *enum_res;
+ struct hbm_client_disconnect_request *disconnect_req;
+ struct hbm_host_stop_request *h_stop_req;
+ int i;
+ unsigned char *buffer;
+
+ /* read the message to our buffer */
+ buffer = (unsigned char *) dev->rd_msg_buf;
+ BUG_ON(heci_hdr->length >= sizeof(dev->rd_msg_buf));
+ heci_read_slots(dev, buffer, heci_hdr->length);
+ heci_msg = (struct heci_bus_message *) buffer;
+
+ switch (*(__u8 *) heci_msg) {
+ case HOST_START_RES_CMD:
+ version_res = (struct hbm_host_version_response *) heci_msg;
+ if (version_res->host_version_supported) {
+ dev->version.major_version = HBM_MAJOR_VERSION;
+ dev->version.minor_version = HBM_MINOR_VERSION;
+ } else {
+ dev->version = version_res->me_max_version;
+ }
+ dev->recvd_msg = 1;
+ DBG("host start response message received.\n");
+ break;
+
+ case CLIENT_CONNECT_RES_CMD:
+ connect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_connect_response(dev, connect_res);
+ DBG("client connect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case CLIENT_DISCONNECT_RES_CMD:
+ disconnect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_disconnect_response(dev, disconnect_res);
+ DBG("client disconnect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case HECI_FLOW_CONTROL_CMD:
+ flow_control = (struct hbm_flow_control *) heci_msg;
+ heci_client_flow_control_response(dev, flow_control);
+ DBG("client flow control response message received.\n");
+ break;
+
+ case HOST_CLIENT_PROPERTEIS_RES_CMD:
+ props_res = (struct hbm_props_response *) heci_msg;
+ if (props_res->status != 0) {
+ BUG();
+ break;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ props_res->address) {
+ dev->me_clients[i].props =
+ props_res->client_properties;
+ break;
+ }
+
+ }
+ dev->recvd_msg = 1;
+ break;
+
+ case HOST_ENUM_RES_CMD:
+ enum_res = (struct hbm_host_enum_response *) heci_msg;
+ memcpy(dev->heci_me_clients, enum_res->valid_addresses, 32);
+ dev->recvd_msg = 1;
+ break;
+
+ case HOST_STOP_RES_CMD:
+ dev->heci_state = HECI_DISABLED;
+ DBG("reseting because of FW stop response.\n");
+ heci_reset(dev, 1);
+ break;
+
+ case CLIENT_DISCONNECT_REQ_CMD:
+ /* search for client */
+ disconnect_req =
+ (struct hbm_client_disconnect_request *) heci_msg;
+ heci_client_disconnect_request(dev, disconnect_req);
+ break;
+
+ case ME_STOP_REQ_CMD:
+ /* prepare stop request */
+ heci_hdr = (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ h_stop_req =
+ (struct hbm_host_stop_request *) &dev->ext_msg_buf[1];
+ memset(h_stop_req, 0, sizeof(struct hbm_host_stop_request));
+ h_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ h_stop_req->reason = DRIVER_STOP_REQUEST;
+ h_stop_req->reserved[0] = 0;
+ h_stop_req->reserved[1] = 0;
+ dev->extra_write_index = 2;
+ break;
+
+ default:
+ BUG();
+ break;
+
+ }
+}
+
+/**
+ * heci_bh_read_pthi_message - bottom half read routine after ISR to
+ * handle the read pthi message data processing.
+ *
+ * @complete_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @heci_hdr: header of pthi message
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb;
+ unsigned char *buffer;
+
+ BUG_ON(heci_hdr->me_addr != dev->iamthif_file_ext.me_client_id);
+ BUG_ON(dev->iamthif_state != HECI_IAMTHIF_READING);
+
+ buffer = (unsigned char *) (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index);
+ BUG_ON(sizeof(dev->iamthif_msg_buf) <
+ (dev->iamthif_msg_buf_index + heci_hdr->length));
+
+ heci_read_slots(dev, buffer, heci_hdr->length);
+
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+
+ if (!(heci_hdr->msg_complete))
+ return 0;
+
+ DBG("pthi_message_buffer_index=%d\n", heci_hdr->length);
+ DBG("completed pthi read.\n ");
+ if (!dev->iamthif_current_cb)
+ return -ENODEV;
+
+ priv_cb = dev->iamthif_current_cb;
+ dev->iamthif_current_cb = NULL;
+
+ file_ext = (struct heci_file_private *)priv_cb->file_private;
+ if (!file_ext)
+ return -ENODEV;
+
+ dev->iamthif_stall_timer = 0;
+ priv_cb->information = dev->iamthif_msg_buf_index;
+ priv_cb->read_time = get_seconds();
+ if ((dev->iamthif_ioctl) && (file_ext == &dev->iamthif_file_ext)) {
+ /* found the iamthif cb */
+ DBG("complete the pthi read cb.\n ");
+ if (&dev->iamthif_file_ext) {
+ DBG("add the pthi read cb to complete.\n ");
+ list_add_tail(&priv_cb->cb_list,
+ &complete_list->heci_cb.cb_list);
+ }
+ }
+ return 0;
+}
+
+/**
+ * _heci_bh_state_ok - check if heci header matches file private data
+ *
+ * @file_ext: private data of the file object
+ * @heci_hdr: header of heci client message
+ *
+ * returns !=0 if matches, 0 if no match.
+ */
+static int _heci_bh_state_ok(struct heci_file_private *file_ext,
+ struct heci_msg_hdr *heci_hdr)
+{
+ return ((file_ext->host_client_id == heci_hdr->host_addr)
+ && (file_ext->me_client_id == heci_hdr->me_addr)
+ && (file_ext->state == HECI_FILE_CONNECTED)
+ && (HECI_READ_COMPLETE != file_ext->reading_state));
+}
+
+/**
+ * heci_bh_read_client_message - bottom half read routine after ISR to
+ * handle the read heci client message data processing.
+ *
+ * @complete_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @heci_hdr: header of heci client message
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ unsigned char *buffer = NULL;
+
+ DBG("start client msg\n");
+ if (!((dev->read_list.status == 0) &&
+ !list_empty(&dev->read_list.heci_cb.cb_list)))
+ goto quit;
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if ((file_ext != NULL) &&
+ (_heci_bh_state_ok(file_ext, heci_hdr))) {
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_READING;
+ buffer = (unsigned char *)
+ (priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information);
+ BUG_ON(priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information);
+
+ if (priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information) {
+ DBG("message overflow.\n");
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENOMEM;
+ }
+ if (buffer) {
+ heci_read_slots(dev, buffer,
+ heci_hdr->length);
+ }
+ priv_cb_pos->information += heci_hdr->length;
+ if (heci_hdr->msg_complete) {
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ DBG("completed read host client = %d,"
+ "ME client = %d, "
+ "data length = %lu\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id,
+ priv_cb_pos->information);
+
+ *(priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information) = '\0';
+ DBG("priv_cb_pos->res_buffer - %s\n",
+ priv_cb_pos->response_buffer.data);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &complete_list->heci_cb.cb_list);
+ } else {
+ spin_unlock(&file_ext->read_io_lock);
+ }
+
+ break;
+ }
+
+ }
+
+quit:
+ DBG("message read\n");
+ if (!buffer) {
+ heci_read_slots(dev, (unsigned char *) dev->rd_msg_buf,
+ heci_hdr->length);
+ DBG("discarding message, header=%08x.\n",
+ *(__u32 *) dev->rd_msg_buf);
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_iamthif_read - prepare to read iamthif data.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_iamthif_read(struct iamt_heci_device *dev, __s32 *slots)
+{
+
+ if (((*slots) * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr)
+ + sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, &dev->iamthif_file_ext)) {
+ DBG("iamthif flow control failed\n");
+ } else {
+ DBG("iamthif flow control success\n");
+ dev->iamthif_state = HECI_IAMTHIF_READING;
+ dev->iamthif_flow_control_pending = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_stall_timer = IAMTHIF_STALL_TIMER;
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+ }
+ return 0;
+ } else {
+ return -ECOMPLETE_MESSAGE;
+ }
+}
+
+/**
+ * _heci_bh_close - process close related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_close(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request) + 3) / 4;
+
+ if (!heci_disconnect(dev, file_ext)) {
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_hb_close - process read related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_read(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+
+/**
+ * _heci_bh_ioctl - process ioctl related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_ioctl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request))) {
+ file_ext->state = HECI_FILE_CONNECTING;
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request) + 3) / 4;
+ if (!heci_connect(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl - process completed and no-iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ (priv_cb_pos->request_buffer.size -
+ priv_cb_pos->information))) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = ((priv_cb_pos->request_buffer.size) -
+ (priv_cb_pos->information));
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ "heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n",
+ heci_hdr->length);
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ file_ext->status = 0;
+ priv_cb_pos->information += heci_hdr->length;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ (*slots) -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ priv_cb_pos->information += heci_hdr->length;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ " heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl_iamthif - process completed iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl_iamthif(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ dev->iamthif_msg_buf_size -
+ dev->iamthif_msg_buf_index)) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = dev->iamthif_msg_buf_size -
+ dev->iamthif_msg_buf_index;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index),
+ heci_hdr->length)) {
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+ priv_cb_pos->information = dev->iamthif_msg_buf_index;
+ file_ext->status = 0;
+ dev->iamthif_state = HECI_IAMTHIF_FLOW_CONTROL;
+ dev->iamthif_flow_control_pending = 1;
+ /* save iamthif cb sent to pthi client */
+ dev->iamthif_current_cb = priv_cb_pos;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ } else {
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * heci_bh_write_handler - bottom half write routine after
+ * ISR to handle the write processing.
+ *
+ * @cmpl_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @slots: slots to write.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_write_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ struct io_heci_list *list;
+ int ret;
+
+ if (!host_buffer_is_empty(dev)) {
+ DBG("host buffer is not empty.\n");
+ return 0;
+ }
+ dev->write_hang = -1;
+ *slots = count_empty_write_slots(dev);
+ /* complete all waiting for write CB */
+ DBG("complete all waiting for write cb.\n");
+
+ list = &dev->write_waiting_list;
+ if ((list->status == 0)
+ && !list_empty(&list->heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &list->heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext != NULL) {
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ if ((HECI_WRITING == file_ext->writing_state) &&
+ (priv_cb_pos->major_file_operations ==
+ HECI_WRITING) &&
+ (file_ext != &dev->iamthif_file_ext)) {
+ DBG("HECI WRITE COMPLETE\n");
+ file_ext->writing_state =
+ HECI_WRITE_COMPLETE;
+ list_add_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ }
+ if (file_ext == &dev->iamthif_file_ext) {
+ DBG("check iamthif flow control.\n");
+ if (dev->iamthif_flow_control_pending) {
+ ret = _heci_bh_iamthif_read(dev,
+ slots);
+ if (ret != 0)
+ return ret;
+ }
+ }
+ }
+
+ }
+ }
+
+ if ((dev->stop) && (!dev->wd_pending)) {
+ dev->wd_stoped = 1;
+ wake_up_interruptible(&dev->wait_stop_wd);
+ return 0;
+ }
+
+ if (dev->extra_write_index != 0) {
+ DBG("extra_write_index =%d.\n", dev->extra_write_index);
+ heci_write_message(dev,
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0],
+ (unsigned char *) &dev->ext_msg_buf[1],
+ (dev->extra_write_index - 1) * sizeof(__u32));
+ *slots -= dev->extra_write_index;
+ dev->extra_write_index = 0;
+ }
+ if (dev->heci_state == HECI_ENABLED) {
+ if ((dev->wd_pending)
+ && flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ if (!heci_send_wd(dev))
+ DBG("wd send failed.\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+
+ if (dev->wd_timeout != 0) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_START_WD_DATA_SIZE + 3) / 4;
+ dev->wd_due_counter = 2;
+ } else {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_WD_PARAMS_SIZE + 3) / 4;
+ dev->wd_due_counter = 0;
+ }
+
+ }
+ }
+ if (dev->stop)
+ return ~ENODEV;
+
+ /* complete control write list CB */
+ if (dev->ctrl_wr_list.status == 0) {
+ /* complete control write list CB */
+ DBG("complete control write list cb.\n");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_wr_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ }
+ switch (priv_cb_pos->major_file_operations) {
+ case HECI_CLOSE:
+ /* send disconnect message */
+ ret = _heci_bh_close(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_READ:
+ /* send flow control message */
+ ret = _heci_bh_read(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_IOCTL:
+ /* connect message */
+ if (!other_client_is_connecting(dev, file_ext))
+ continue;
+ ret = _heci_bh_ioctl(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+
+ default:
+ BUG();
+ }
+
+ }
+ }
+ /* complete write list CB */
+ if ((dev->write_list.status == 0)
+ && !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ DBG("complete write list cb.\n");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (file_ext != NULL) {
+ if (file_ext != &dev->iamthif_file_ext) {
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control"
+ " credentials for client"
+ " %d, not sending.\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl(dev, slots,
+ priv_cb_pos,
+ file_ext,
+ cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ } else if (file_ext == &dev->iamthif_file_ext) {
+ /* IAMTHIF IOCTL */
+ DBG("complete pthi write cb.\n");
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control"
+ " credentials for pthi"
+ " client %d.\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl_iamthif(dev, slots,
+ priv_cb_pos,
+ file_ext,
+ cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ }
+ }
+
+ }
+ }
+ return 0;
+}
+
+
+/**
+ * is_treat_specially_client - check if the message belong
+ * to the file private data.
+ *
+ * @file_ext: private data of the file object
+ * @rs: connect response bus message
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int is_treat_specially_client(struct heci_file_private *file_ext,
+ struct hbm_client_connect_response *rs)
+{
+ int ret = 0;
+
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+ if (rs->status == 0) {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_CONNECTED;
+ file_ext->status = 0;
+ } else {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_DISCONNECTED;
+ file_ext->status = -ENODEV;
+ }
+ ret = 1;
+ }
+ DBG("client state = %d.\n", file_ext->state);
+ return ret;
+}
+
+/**
+ * heci_client_connect_response - connect response bh routine
+ *
+ * @dev: Device object for our driver
+ * @rs: connect response bus message
+ */
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ /* if WD or iamthif client treat specially */
+
+ if ((is_treat_specially_client(&(dev->wd_file_ext), rs)) ||
+ (is_treat_specially_client(&(dev->iamthif_file_ext), rs)))
+ return;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+ if (HECI_IOCTL == priv_cb_pos->major_file_operations) {
+ if (is_treat_specially_client(file_ext, rs)) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+ }
+}
+
+/**
+ * heci_client_disconnect_response - disconnect response bh routine
+ *
+ * @dev: Device object for our driver
+ * @rs: disconnect response bus message
+ */
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+
+ DBG("list_for_each_entry_safe in ctrl_rd_list.\n");
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+
+ list_del(&priv_cb_pos->cb_list);
+ if (rs->status == 0) {
+ file_ext->state =
+ HECI_FILE_DISCONNECTED;
+ }
+
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_flow_addr - tell they have same address.
+ *
+ * @file: private data of the file object.
+ * @flow: flow control.
+ *
+ * returns !=0, same; 0,not.
+ */
+static int same_flow_addr(struct heci_file_private *file,
+ struct hbm_flow_control *flow)
+{
+ return ((file->host_client_id == flow->host_addr)
+ && (file->me_client_id == flow->me_addr));
+}
+
+/**
+ * add_single_flow_creds - add single buffer credentials.
+ *
+ * @file: private data ot the file object.
+ * @flow: flow control.
+ */
+static void add_single_flow_creds(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow)
+{
+ struct heci_me_client *client;
+ int i;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ client = &dev->me_clients[i];
+ if ((client != NULL) &&
+ (flow->me_addr == client->client_id)) {
+ if (client->props.single_recv_buf != 0) {
+ client->flow_ctrl_creds++;
+ DBG("recv flow ctrl msg ME %d (single).\n",
+ flow->me_addr);
+ DBG("flow control credentials=%d.\n",
+ client->flow_ctrl_creds);
+ } else {
+ BUG(); /* error in flow control */
+ }
+ }
+ }
+}
+
+/**
+ * heci_client_flow_control_response - flow control response bh routine
+ *
+ * @dev: Device object for our driver
+ * @flow_control: flow control response bus message
+ */
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (flow_control->host_addr == 0) {
+ /* single receive buffer */
+ add_single_flow_creds(dev, flow_control);
+ } else {
+ /* normal connection */
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe in file_list\n");
+
+ DBG("file_ext of host client %d ME client %d.\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ DBG("flow ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ if (same_flow_addr(file_pos, flow_control)) {
+ DBG("recv ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ file_pos->flow_ctrl_creds++;
+ DBG("flow control credentials=%d.\n",
+ file_pos->flow_ctrl_creds);
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_disconn_addr - tell they have same address
+ *
+ * @file: private data of the file object.
+ * @disconn: disconnection request.
+ *
+ * returns !=0, same; 0,not.
+ */
+static int same_disconn_addr(struct heci_file_private *file,
+ struct hbm_client_disconnect_request *disconn)
+{
+ return ((file->host_client_id == disconn->host_addr)
+ && (file->me_client_id == disconn->me_addr));
+}
+
+/**
+ * heci_client_disconnect_request - disconnect request bh routine
+ *
+ * @dev: Device object for our driver.
+ * @disconnect_req: disconnect request bus message.
+ */
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_response *disconnect_res;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (same_disconn_addr(file_pos, disconnect_req)) {
+ DBG("disconnect request host client %d ME client %d.\n",
+ disconnect_req->host_addr,
+ disconnect_req->me_addr);
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->timer_count = 0;
+ if (file_pos == &dev->wd_file_ext) {
+ dev->wd_due_counter = 0;
+ dev->wd_pending = 0;
+ } else if (file_pos == &dev->iamthif_file_ext)
+ dev->iamthif_timer = 0;
+
+ /* prepare disconnect response */
+ heci_hdr =
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length =
+ sizeof(struct hbm_client_connect_response);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ disconnect_res =
+ (struct hbm_client_connect_response *)
+ &dev->ext_msg_buf[1];
+ disconnect_res->host_addr = file_pos->host_client_id;
+ disconnect_res->me_addr = file_pos->me_client_id;
+ *(__u8 *) (&disconnect_res->cmd) =
+ CLIENT_DISCONNECT_RES_CMD;
+ disconnect_res->status = 0;
+ dev->extra_write_index = 2;
+ break;
+ }
+ }
+}
+
+/**
+ * heci_timer - timer function.
+ *
+ * @data: pointer to the device structure
+ *
+ * NOTE: This function is called by timer interrupt work
+ */
+void heci_wd_timer(unsigned long data)
+{
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ DBG("send watchdog.\n");
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ /* Watchdog */
+ if ((dev->wd_due_counter != 0) && (dev->wd_bypass == 0)) {
+ if (--dev->wd_due_counter == 0) {
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_wd(dev)) {
+ DBG("wd send failed.\n");
+ } else {
+ flow_ctrl_reduce(dev,
+ &dev->wd_file_ext);
+ }
+
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 2;
+ else
+ dev->wd_due_counter = 0;
+
+ } else
+ dev->wd_pending = 1;
+
+ }
+ }
+ if (dev->iamthif_stall_timer != 0) {
+ if (--dev->iamthif_stall_timer == 0) {
+ DBG("reseting because of hang to PTHI.\n");
+ heci_reset(dev, 1);
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->iamthif_current_cb)
+ heci_free_cb_private(dev->iamthif_current_cb);
+
+ spin_lock_bh(&dev->device_lock);
+ dev->iamthif_file_object = NULL;
+ dev->iamthif_current_cb = NULL;
+ run_next_iamthif_cmd(dev);
+ }
+ }
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+}
diff --git a/drivers/char/heci/io_heci.c b/drivers/char/heci/io_heci.c
new file mode 100644
index 0000000..d7e0648
--- /dev/null
+++ b/drivers/char/heci/io_heci.c
@@ -0,0 +1,847 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/list.h>
+#include <linux/unistd.h>
+#include <linux/delay.h>
+
+#include "heci_data_structures.h"
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+/**
+ * heci_ioctl_get_version - the get driver version IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @*u_msg: pointer to user data struct in user space
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ struct heci_driver_version *version;
+ struct heci_message_data res_msg;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev)
+ || (!file_ext))
+ return -ENODEV;
+
+ if (k_msg.size < (sizeof(struct heci_driver_version) - 2)) {
+ DBG("user buffer less than heci_driver_version.\n");
+ return -EMSGSIZE;
+ }
+
+ res_msg.data = kmalloc(sizeof(struct heci_driver_version), GFP_KERNEL);
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_driver_version));
+ return -ENOMEM;
+ }
+
+ version = (struct heci_driver_version *) res_msg.data;
+ version->major = MAJOR_VERSION;
+ version->minor = MINOR_VERSION;
+ version->hotfix = QUICK_FIX_NUMBER;
+ version->build = VER_BUILD;
+ res_msg.size = sizeof(struct heci_driver_version);
+ if (k_msg.size < sizeof(struct heci_driver_version))
+ res_msg.size -= 2;
+
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+end:
+ kfree(res_msg.data);
+ return rets;
+}
+
+/**
+ * heci_ioctl_connect_client - the connect to fw client IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @*u_msg: pointer to user data struct in user space
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file)
+{
+ int rets = 0;
+ struct heci_message_data req_msg, res_msg;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_client *client;
+ struct heci_file_private *file_ext;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ long timeout = 15; /*15 second */
+ __u8 i;
+ int err = 0;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file))
+ return -ENODEV;
+
+ file_ext = file->private_data;
+ if (!file_ext)
+ return -ENODEV;
+
+ if (k_msg.size != sizeof(struct guid)) {
+ DBG("user buffer size is not equal to size of struct "
+ "guid(16).\n");
+ return -EMSGSIZE;
+ }
+
+ if (!k_msg.data)
+ return -EIO;
+
+ req_msg.data = kmalloc(sizeof(struct guid), GFP_KERNEL);
+ res_msg.data = kmalloc(sizeof(struct heci_client), GFP_KERNEL);
+
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_client));
+ kfree(req_msg.data);
+ return -ENOMEM;
+ }
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ (int) sizeof(struct guid));
+ kfree(res_msg.data);
+ return -ENOMEM;
+ }
+ req_msg.size = sizeof(struct guid);
+ res_msg.size = sizeof(struct heci_client);
+
+ /* copy the message to kernel space -
+ * use a pointer already copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, k_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ /* buffered ioctl cb */
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb) {
+ rets = -ENOMEM;
+ goto end;
+ }
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->response_buffer.data = res_msg.data;
+ priv_cb->response_buffer.size = res_msg.size;
+ priv_cb->request_buffer.data = req_msg.data;
+ priv_cb->request_buffer.size = req_msg.size;
+ priv_cb->major_file_operations = HECI_IOCTL;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if ((file_ext->state != HECI_FILE_INITIALIZING) &&
+ (file_ext->state != HECI_FILE_DISCONNECTED)) {
+ rets = -EBUSY;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ /* find ME client we're trying to connect to */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp((struct guid *)req_msg.data,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (dev->me_clients[i].props.fixed_address == 0) {
+ file_ext->me_client_id =
+ dev->me_clients[i].client_id;
+ file_ext->state = HECI_FILE_CONNECTING;
+ }
+ break;
+ }
+ }
+ /* if we're connecting to PTHI client so we will use the exist
+ * connection
+ */
+ if (memcmp((struct guid *)req_msg.data, &heci_pthi_guid,
+ sizeof(struct guid)) == 0) {
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ if (heci_fe_same_id(file_ext, file_pos)) {
+ DBG("remove file private data node host"
+ " client = %d, ME client = %d.\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del(&file_pos->link);
+ }
+
+ }
+ DBG("free file private data memory.\n");
+ kfree(file_ext);
+ file_ext = NULL;
+ file->private_data = &dev->iamthif_file_ext;
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length =
+ dev->me_clients[i].props.max_msg_length;
+ client->protocol_version =
+ dev->me_clients[i].props.protocol_version;
+ rets = dev->iamthif_file_ext.status;
+ spin_unlock_bh(&dev->device_lock);
+
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ }
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state != HECI_FILE_CONNECTING) {
+ rets = -ENODEV;
+ spin_unlock(&file_ext->file_lock);
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ spin_unlock(&file_ext->file_lock);
+ /* prepare the output buffer */
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length = dev->me_clients[i].props.max_msg_length;
+ client->protocol_version = dev->me_clients[i].props.protocol_version;
+ if (dev->host_buffer_is_empty
+ && !other_client_is_connecting(dev, file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_connect(dev, file_ext)) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ } else {
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ priv_cb->file_private = file_ext;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.
+ cb_list);
+ }
+
+
+ } else {
+ priv_cb->file_private = file_ext;
+ DBG("add connect cb to control write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+
+ if (HECI_FILE_CONNECTED == file_ext->state) {
+ DBG("successfully connected to FW client.\n");
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ } else {
+ DBG("failed to connect to FW client.file_ext->state = %d.\n",
+ file_ext->state);
+ if (!err) {
+ DBG("wait_event_interruptible_timeout failed on client"
+ " connect message fw response message.\n");
+ }
+ rets = -EFAULT;
+ goto remove_list;
+ }
+
+remove_list:
+ if (priv_cb) {
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_list(&dev->ctrl_rd_list, file_ext);
+ heci_flush_list(&dev->ctrl_wr_list, file_ext);
+ spin_unlock_bh(&dev->device_lock);
+ }
+end:
+ DBG("free connect cb memory.");
+ kfree(req_msg.data);
+ kfree(res_msg.data);
+ kfree(priv_cb);
+ return rets;
+}
+
+/**
+ * heci_ioctl_wd - the wd IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ struct heci_message_data req_msg; /*in kernel on the stack */
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size != HECI_WATCHDOG_DATA_SIZE) {
+ DBG("user buffer has invalid size.\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+
+ req_msg.data = kmalloc(HECI_WATCHDOG_DATA_SIZE, GFP_KERNEL);
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ HECI_WATCHDOG_DATA_SIZE);
+ return -ENOMEM;
+ }
+ req_msg.size = HECI_WATCHDOG_DATA_SIZE;
+
+ /* copy the message to kernel space - use a pointer already
+ * copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, req_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if (!dev->asf_mode) {
+ rets = -EIO;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ memcpy(&dev->wd_data[HECI_WD_PARAMS_SIZE], req_msg.data,
+ HECI_WATCHDOG_DATA_SIZE);
+
+ dev->wd_timeout = (req_msg.data[1] << 8) + req_msg.data[0];
+ dev->wd_pending = 0;
+ dev->wd_due_counter = 1; /* next timer */
+ if (dev->wd_timeout == 0) {
+ memcpy(dev->wd_data, heci_stop_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ } else {
+ memcpy(dev->wd_data, heci_start_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ mod_timer(&dev->wd_timer, jiffies);
+ }
+ spin_unlock_bh(&dev->device_lock);
+end:
+ kfree(req_msg.data);
+ return rets;
+}
+
+
+/**
+ * heci_ioctl_bypass_wd - the bypass_wd IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_bypass_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ __u8 flag = 0;
+ int rets = 0;
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size < 1) {
+ DBG("user buffer less than HECI_WATCHDOG_DATA_SIZE.\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+ if (copy_from_user(&flag, k_msg.data, 1)) {
+ rets = -EFAULT;
+ goto end;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ flag = flag ? (1) : (0);
+ dev->wd_bypass = flag;
+ spin_unlock_bh(&dev->device_lock);
+end:
+ return rets;
+}
+
+/**
+ * find_pthi_read_list_entry - finds a PTHIlist entry for current file
+ *
+ * @dev: Device object for our driver
+ * @file: pointer to file object
+ *
+ * returns returned a list entry on success, NULL on failure.
+ */
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct file *file)
+{
+ struct heci_file_private *file_ext_temp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if ((dev->pthi_read_complete_list.status == 0) &&
+ !list_empty(&dev->pthi_read_complete_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_read_complete_list.heci_cb.cb_list, cb_list) {
+ file_ext_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if ((file_ext_temp != NULL) &&
+ (file_ext_temp == &dev->iamthif_file_ext) &&
+ (priv_cb_pos->file_object == file))
+ return priv_cb_pos;
+ }
+ }
+ return NULL;
+}
+
+/**
+ * pthi_read - read data from pthi client
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @file: pointer to file object
+ * @*ubuf: pointer to user data in user space
+ * @length: data length to read
+ * @offset: data read offset
+ *
+ * returns
+ * returned data length on success,
+ * zero if no data to read,
+ * negative on failure.
+ */
+int pthi_read(struct iamt_heci_device *dev, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset)
+{
+ int rets = 0;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_file_private *file_ext = file->private_data;
+ __u8 i;
+ unsigned long currtime = get_seconds();
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ if ((file_ext == NULL) || (file_ext != &dev->iamthif_file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->iamthif_file_ext.me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients)
+ || (dev->me_clients[i].client_id !=
+ dev->iamthif_file_ext.me_client_id)) {
+ DBG("PTHI client not found.\n");
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ priv_cb = find_pthi_read_list_entry(dev, file);
+ if (!priv_cb) {
+ spin_unlock_bh(&dev->device_lock);
+ return 0; /* No more data to read */
+ } else {
+ if (priv_cb &&
+ (currtime - priv_cb->read_time > IAMTHIF_READ_TIMER)) {
+ /* 15 sec for the message has expired */
+ list_del(&priv_cb->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ETIMEDOUT;
+ goto free;
+ }
+ /* if the whole message will fit remove it from the list */
+ if ((priv_cb->information >= *offset) &&
+ (length >= (priv_cb->information - *offset)))
+ list_del(&priv_cb->cb_list);
+ else if ((priv_cb->information > 0) &&
+ (priv_cb->information <= *offset)) {
+ /* end of the message has been reached */
+ list_del(&priv_cb->cb_list);
+ rets = 0;
+ spin_unlock_bh(&dev->device_lock);
+ goto free;
+ }
+ /* else means that not full buffer will be read and do not
+ * remove message from deletion list
+ */
+ }
+ DBG("pthi priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("pthi priv_cb->information - %lu\n",
+ priv_cb->information);
+ spin_unlock_bh(&dev->device_lock);
+
+ /* length is being turncated to PAGE_SIZE, however,
+ * the information may be longer */
+ length = length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset);
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length))
+ rets = -EFAULT;
+ else {
+ rets = length;
+ if ((*offset + length) < priv_cb->information) {
+ *offset += length;
+ goto out;
+ }
+ }
+free:
+ DBG("free pthi cb memory.\n");
+ *offset = 0;
+ heci_free_cb_private(priv_cb);
+out:
+ return rets;
+}
+
+/**
+ * heci_start_read - the start read client message function.
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_start_read(struct iamt_heci_device *dev, int if_num,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ __u8 i;
+ struct heci_cb_private *priv_cb = NULL;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext)) {
+ DBG("received wrong function input param.\n");
+ return -ENODEV;
+ }
+ if (file_ext->state != HECI_FILE_CONNECTED)
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ DBG("check if read is pending.\n");
+ if ((file_ext->read_pending) || (file_ext->read_cb != NULL)) {
+ DBG("read is pending.\n");
+ return -EBUSY;
+ }
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ DBG("allocation call back success\n"
+ "host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id)
+ break;
+
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if (i == dev->num_heci_me_clients) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+
+ priv_cb->response_buffer.size = dev->me_clients[i].props.max_msg_length;
+ spin_unlock_bh(&dev->device_lock);
+ priv_cb->response_buffer.data =
+ kmalloc(priv_cb->response_buffer.size, GFP_KERNEL);
+ if (!priv_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ DBG("allocation call back data success.\n");
+ priv_cb->major_file_operations = HECI_READ;
+ /* make sure information is zero before we start */
+ priv_cb->information = 0;
+ priv_cb->file_private = (void *) file_ext;
+ file_ext->read_cb = priv_cb;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ rets = -ENODEV;
+ goto unlock;
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+unlock:
+ spin_unlock_bh(&dev->device_lock);
+fail:
+ heci_free_cb_private(priv_cb);
+ return rets;
+}
+
+/**
+ * pthi_write - write iamthif data to pthi client
+ *
+ * @dev: Device object for our driver
+ * @priv_cb: heci call back struct
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int pthi_write(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb)
+{
+ int rets = 0;
+ struct heci_msg_hdr heci_hdr;
+
+ if ((!dev) || (!priv_cb))
+ return -ENODEV;
+
+ DBG("write data to pthi client.\n");
+
+ dev->iamthif_state = HECI_IAMTHIF_WRITING;
+ dev->iamthif_current_cb = priv_cb;
+ dev->iamthif_file_object = priv_cb->file_object;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_msg_buf_size = priv_cb->request_buffer.size;
+ memcpy(dev->iamthif_msg_buf, priv_cb->request_buffer.data,
+ priv_cb->request_buffer.size);
+
+ if (flow_ctrl_creds(dev, &dev->iamthif_file_ext) &&
+ dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (priv_cb->request_buffer.size >
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr)) {
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = priv_cb->request_buffer.size;
+ heci_hdr.msg_complete = 1;
+ }
+
+ heci_hdr.host_addr = dev->iamthif_file_ext.host_client_id;
+ heci_hdr.me_addr = dev->iamthif_file_ext.me_client_id;
+ heci_hdr.reserved = 0;
+ dev->iamthif_msg_buf_index += heci_hdr.length;
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *)(dev->iamthif_msg_buf),
+ heci_hdr.length))
+ return -ENODEV;
+
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, &dev->iamthif_file_ext);
+ dev->iamthif_flow_control_pending = 1;
+ dev->iamthif_state = HECI_IAMTHIF_FLOW_CONTROL;
+ DBG("add pthi cb to write waiting list\n");
+ dev->iamthif_current_cb = priv_cb;
+ dev->iamthif_file_object = priv_cb->file_object;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ DBG("message does not complete, "
+ "so add pthi cb to write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ } else {
+ if (!(dev->host_buffer_is_empty))
+ DBG("host buffer is not empty");
+
+ DBG("No flow control credentials, "
+ "so add iamthif cb to write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return rets;
+}
+
+/**
+ * iamthif_ioctl_send_msg - send cmd data to pthi client
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+void run_next_iamthif_cmd(struct iamt_heci_device *dev)
+{
+ struct heci_file_private *file_ext_tmp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int status = 0;
+
+ if (!dev)
+ return;
+
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+ dev->iamthif_file_object = NULL;
+
+ if (dev->pthi_cmd_list.status == 0 &&
+ !list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)) {
+ DBG("complete pthi cmd_list cb.\n");
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_cmd_list.heci_cb.cb_list, cb_list) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext_tmp != NULL) &&
+ (file_ext_tmp == &dev->iamthif_file_ext)) {
+ status = pthi_write(dev, priv_cb_pos);
+ if (status != 0) {
+ DBG("pthi write failed status = %d\n",
+ status);
+ return;
+ }
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * heci_free_cb_private - free heci_cb_private related memory
+ *
+ * @priv_cb: heci callback struct
+ */
+void heci_free_cb_private(struct heci_cb_private *priv_cb)
+{
+ if (priv_cb == NULL)
+ return;
+
+ kfree(priv_cb->request_buffer.data);
+ kfree(priv_cb->response_buffer.data);
+ kfree(priv_cb);
+}
+
^ permalink raw reply related [flat|nested] 42+ messages in thread
* [PATCH] Intel Management Engine Interface
2008-07-18 19:23 ` Marcin Obara
@ 2008-07-18 20:30 ` Marcin Obara
2008-07-23 18:00 ` Marcin Obara
0 siblings, 1 reply; 42+ messages in thread
From: Marcin Obara @ 2008-07-18 20:30 UTC (permalink / raw)
To: linux-kernel
Fixed more issues raised on lkml after todays resubmission.
The Intel Management Engine Interface (aka HECI: Host Embedded
Controller Interface ) enables communication between the host OS and
the Management Engine firmware. MEI is bi-directional, and either the
host or Intel AMT firmware can initiate transactions.
The core hardware architecture of Intel Active Management Technology
(Intel AMT) is resident in firmware. The micro-controller within the
chipset's graphics and memory controller (GMCH) hub houses the
Management Engine (ME) firmware, which implements various services
on behalf of management applications.
Some of the ME subsystems that can be access via MEI driver:
- Intel(R) Quiet System Technology (QST) is implemented as a firmware
subsystem that runs in the ME. Programs that wish to expose the
health monitoring and fan speed control capabilities of Intel(R) QST
will need to use the MEI driver to communicate with the ME sub-system.
- ASF is the "Alert Standard Format" which is an DMTF manageability
standard. It is implemented in the PC's hardware and firmware, and is
managed from a remote console.
Most recent Intel desktop chipsets have one or more of the above ME
services. The MEI driver will make it possible to support the above
features on Linux and provides applications access to the ME and it's
features.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Signed-off-by: Marcin Obara <marcin.obara@intel.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 93fd6b2..adb913b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2195,6 +2195,15 @@ L: e1000-devel@lists.sourceforge.net
W: http://e1000.sourceforge.net/
S: Supported
+INTEL MANAGEABILITY ENGINE INTERFACE (HECI)
+P: Anas Nashif
+M: anas.nashif@intel.com
+P: Marcin Obara
+M: marcin.obara@intel.com
+W: http://www.openamt.org/
+L: openamt-devel@lists.sourceforge.net
+S: Supported
+
INTEL PRO/WIRELESS 2100 NETWORK CONNECTION SUPPORT
P: Zhu Yi
M: yi.zhu@intel.com
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 650e6b4..9872215 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -1103,6 +1103,7 @@ config DEVPORT
default y
source "drivers/s390/char/Kconfig"
+source "drivers/char/heci/Kconfig"
endmenu
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 0e0d12a..1d5e700 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -107,6 +107,7 @@ obj-$(CONFIG_IPMI_HANDLER) += ipmi/
obj-$(CONFIG_HANGCHECK_TIMER) += hangcheck-timer.o
obj-$(CONFIG_TCG_TPM) += tpm/
+obj-$(CONFIG_INTEL_MEI) += heci/
obj-$(CONFIG_PS3_FLASH) += ps3flash.o
diff --git a/drivers/char/heci/Kconfig b/drivers/char/heci/Kconfig
new file mode 100644
index 0000000..99b7d05
--- /dev/null
+++ b/drivers/char/heci/Kconfig
@@ -0,0 +1,12 @@
+#
+# HECI device configuration
+#
+
+config INTEL_MEI
+ tristate "Intel Management Engine Interface (MEI) Support (EXPERIMENTAL)"
+ depends on EXPERIMENTAL
+ ---help---
+ The Intel Management Engine Interface (Intel MEI) driver allows
+ applications to access the Active Management Technology
+ firmware and other Management Engine sub-systems.
+
diff --git a/drivers/char/heci/Makefile b/drivers/char/heci/Makefile
new file mode 100644
index 0000000..a2d7182
--- /dev/null
+++ b/drivers/char/heci/Makefile
@@ -0,0 +1,7 @@
+#
+## Makefile for the Intel MEI driver (heci)
+#
+
+obj-$(CONFIG_INTEL_MEI) += heci.o
+
+heci-objs := heci_init.o heci_interface.o heci_main.o interrupt.o io_heci.o
diff --git a/drivers/char/heci/heci.h b/drivers/char/heci/heci.h
new file mode 100644
index 0000000..9b279f3
--- /dev/null
+++ b/drivers/char/heci/heci.h
@@ -0,0 +1,176 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_H_
+#define _HECI_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+extern const struct guid heci_pthi_guid;
+extern const struct guid heci_wd_guid;
+extern const __u8 heci_start_wd_params[];
+extern const __u8 heci_stop_wd_params[];
+extern const __u8 heci_wd_state_independence_msg[3][4];
+
+/*
+ * heci device ID
+ */
+#define HECI_DEV_ID_82946GZ 0x2974 /* 82946GZ/GL */
+#define HECI_DEV_ID_82G35 0x2984 /* 82G35 Express */
+#define HECI_DEV_ID_82Q965 0x2994 /* 82Q963/Q965 */
+#define HECI_DEV_ID_82G965 0x29A4 /* 82P965/G965 */
+
+#define HECI_DEV_ID_82GM965 0x2A04 /* Mobile PM965/GM965 */
+#define HECI_DEV_ID_82GME965 0x2A14 /* Mobile GME965/GLE960 */
+
+#define HECI_DEV_ID_ICH9_82Q35 0x29B4 /* 82Q35 Express */
+#define HECI_DEV_ID_ICH9_82G33 0x29C4 /* 82G33/G31/P35/P31 Express */
+#define HECI_DEV_ID_ICH9_82Q33 0x29D4 /* 82Q33 Express */
+#define HECI_DEV_ID_ICH9_82X38 0x29E4 /* 82X38/X48 Express */
+#define HECI_DEV_ID_ICH9_3200 0x29F4 /* 3200/3210 Server */
+
+#define HECI_DEV_ID_ICH9_6 0x28B4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_7 0x28C4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_8 0x28D4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_9 0x28E4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_10 0x28F4 /* Bearlake */
+
+#define HECI_DEV_ID_ICH9M_1 0x2A44 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_2 0x2A54 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_3 0x2A64 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_4 0x2A74 /* Cantiga */
+
+#define HECI_DEV_ID_ICH10_1 0x2E04 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_2 0x2E14 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_3 0x2E24 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_4 0x2E34 /* Eaglelake */
+
+/*
+ * heci init function prototypes
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev);
+void heci_reset(struct iamt_heci_device *dev, int interrupts);
+int heci_hw_init(struct iamt_heci_device *dev);
+int heci_task_initialize_clients(void *data);
+int heci_initialize_clients(struct iamt_heci_device *dev);
+struct heci_file_private *heci_alloc_file_private(struct file *file);
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev);
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext);
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id);
+
+/*
+ * interrupt function prototype
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id);
+
+void heci_wd_timer(unsigned long data);
+
+/*
+ * input output function prototype
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file);
+
+int heci_ioctl_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_bypass_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_start_read(struct iamt_heci_device *dev, int if_num,
+ struct heci_file_private *file_ext);
+
+int pthi_write(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb);
+
+int pthi_read(struct iamt_heci_device *dev, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset);
+
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct file *file);
+
+void run_next_iamthif_cmd(struct iamt_heci_device *dev);
+
+void heci_free_cb_private(struct heci_cb_private *priv_cb);
+
+/**
+ * heci_fe_same_id - tell if file private data have same id
+ *
+ * @fe1: private data of 1. file object
+ * @fe2: private data of 2. file object
+ *
+ * returns !=0 - if ids are the same, 0 - if differ.
+ */
+static inline int heci_fe_same_id(const struct heci_file_private *fe1,
+ const struct heci_file_private *fe2)
+{
+ return ((fe1->host_client_id == fe2->host_client_id)
+ && (fe1->me_client_id == fe2->me_client_id));
+}
+
+#endif /* _HECI_H_ */
diff --git a/drivers/char/heci/heci_data_structures.h b/drivers/char/heci/heci_data_structures.h
new file mode 100644
index 0000000..beacf7c
--- /dev/null
+++ b/drivers/char/heci/heci_data_structures.h
@@ -0,0 +1,536 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_DATA_STRUCTURES_H_
+#define _HECI_DATA_STRUCTURES_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+
+/*
+ * error code definition
+ */
+#define ESLOTS_OVERFLOW 1
+#define ECORRUPTED_MESSAGE_HEADER 1000
+#define ECOMPLETE_MESSAGE 1001
+
+#define HECI_FC_MESSAGE_RESERVED_LENGTH 5
+
+/*
+ * Number of queue lists used by this driver
+ */
+#define HECI_IO_LISTS_NUMBER 7
+
+/*
+ * Maximum transmission unit (MTU) of heci messages
+ */
+#define IAMTHIF_MTU 4160
+
+
+/*
+ * HECI HW Section
+ */
+
+/* HECI registers */
+/* H_CB_WW - Host Circular Buffer (CB) Write Window register */
+#define H_CB_WW 0
+/* H_CSR - Host Control Status register */
+#define H_CSR 4
+/* ME_CB_RW - ME Circular Buffer Read Window register (read only) */
+#define ME_CB_RW 8
+/* ME_CSR_HA - ME Control Status Host Access register (read only) */
+#define ME_CSR_HA 0xC
+
+
+/* register bits of H_CSR (Host Control Status register) */
+/* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */
+#define H_CBD 0xFF000000
+/* Host Circular Buffer Write Pointer */
+#define H_CBWP 0x00FF0000
+/* Host Circular Buffer Read Pointer */
+#define H_CBRP 0x0000FF00
+/* Host Reset */
+#define H_RST 0x00000010
+/* Host Ready */
+#define H_RDY 0x00000008
+/* Host Interrupt Generate */
+#define H_IG 0x00000004
+/* Host Interrupt Status */
+#define H_IS 0x00000002
+/* Host Interrupt Enable */
+#define H_IE 0x00000001
+
+
+/* register bits of ME_CSR_HA (ME Control Status Host Access register) */
+/* ME CB (Circular Buffer) Depth HRA (Host Read Access)
+ * - host read only access to ME_CBD */
+#define ME_CBD_HRA 0xFF000000
+/* ME CB Write Pointer HRA - host read only access to ME_CBWP */
+#define ME_CBWP_HRA 0x00FF0000
+/* ME CB Read Pointer HRA - host read only access to ME_CBRP */
+#define ME_CBRP_HRA 0x0000FF00
+/* ME Reset HRA - host read only access to ME_RST */
+#define ME_RST_HRA 0x00000010
+/* ME Ready HRA - host read only access to ME_RDY */
+#define ME_RDY_HRA 0x00000008
+/* ME Interrupt Generate HRA - host read only access to ME_IG */
+#define ME_IG_HRA 0x00000004
+/* ME Interrupt Status HRA - host read only access to ME_IS */
+#define ME_IS_HRA 0x00000002
+/* ME Interrupt Enable HRA - host read only access to ME_IE */
+#define ME_IE_HRA 0x00000001
+
+#define HECI_MINORS_BASE 1
+#define HECI_MINORS_COUNT 1
+
+#define HECI_MINOR_NUMBER 1
+#define HECI_MAX_OPEN_HANDLE_COUNT 253
+
+/*
+ * debug kernel print macro define
+ */
+extern int heci_debug;
+extern struct device *heci_dev;
+
+#define DBG(format, arg...) do { \
+ if (heci_debug) { \
+ if (heci_dev) \
+ dev_info(heci_dev, "%s: " format, __func__, ## arg); \
+ else \
+ printk(KERN_INFO "heci: %s: " format, \
+ __func__, ## arg); \
+ } \
+} while (0)
+
+
+/*
+ * time to wait HECI become ready after init
+ */
+#define HECI_INTEROP_TIMEOUT (HZ * 7)
+
+/*
+ * watch dog definition
+ */
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+#define HECI_WD_STATE_INDEPENDENCE_MSG_SENT (1 << 0)
+
+#define HECI_WD_HOST_CLIENT_ID 1
+#define HECI_IAMTHIF_HOST_CLIENT_ID 2
+
+struct guid {
+ __u32 data1;
+ __u16 data2;
+ __u16 data3;
+ __u8 data4[8];
+};
+
+/* File state */
+enum file_state {
+ HECI_FILE_INITIALIZING = 0,
+ HECI_FILE_CONNECTING,
+ HECI_FILE_CONNECTED,
+ HECI_FILE_DISCONNECTING,
+ HECI_FILE_DISCONNECTED
+};
+
+/* HECI device states */
+enum heci_states {
+ HECI_INITIALIZING = 0,
+ HECI_ENABLED,
+ HECI_RESETING,
+ HECI_DISABLED,
+ HECI_RECOVERING_FROM_RESET,
+ HECI_POWER_DOWN,
+ HECI_POWER_UP
+};
+
+enum iamthif_states {
+ HECI_IAMTHIF_IDLE,
+ HECI_IAMTHIF_WRITING,
+ HECI_IAMTHIF_FLOW_CONTROL,
+ HECI_IAMTHIF_READING,
+ HECI_IAMTHIF_READ_COMPLETE
+};
+
+enum heci_file_transaction_states {
+ HECI_IDLE,
+ HECI_WRITING,
+ HECI_WRITE_COMPLETE,
+ HECI_FLOW_CONTROL,
+ HECI_READING,
+ HECI_READ_COMPLETE
+};
+
+/* HECI CB */
+enum heci_cb_major_types {
+ HECI_READ = 0,
+ HECI_WRITE,
+ HECI_IOCTL,
+ HECI_OPEN,
+ HECI_CLOSE
+};
+
+/* HECI user data struct */
+struct heci_message_data {
+ __u32 size;
+ char *data;
+} __attribute__((packed));
+
+#define HECI_CONNECT_TIMEOUT 3 /* at least 2 seconds */
+
+#define IAMTHIF_STALL_TIMER 12 /* seconds */
+#define IAMTHIF_READ_TIMER 15 /* seconds */
+
+struct heci_cb_private {
+ struct list_head cb_list;
+ enum heci_cb_major_types major_file_operations;
+ void *file_private;
+ struct heci_message_data request_buffer;
+ struct heci_message_data response_buffer;
+ unsigned long information;
+ unsigned long read_time;
+ struct file *file_object;
+};
+
+/* Private file struct */
+struct heci_file_private {
+ struct list_head link;
+ struct file *file;
+ enum file_state state;
+ wait_queue_head_t tx_wait;
+ wait_queue_head_t rx_wait;
+ wait_queue_head_t wait;
+ spinlock_t file_lock; /* file lock */
+ spinlock_t read_io_lock; /* read lock */
+ spinlock_t write_io_lock; /* write lock */
+ int read_pending;
+ int status;
+ /* ID of client connected */
+ __u8 host_client_id;
+ __u8 me_client_id;
+ __u8 flow_ctrl_creds;
+ __u8 timer_count;
+ enum heci_file_transaction_states reading_state;
+ enum heci_file_transaction_states writing_state;
+ int sm_state;
+ struct heci_cb_private *read_cb;
+};
+
+struct io_heci_list {
+ struct heci_cb_private heci_cb;
+ int status;
+ struct iamt_heci_device *device_extension;
+};
+
+struct heci_driver_version {
+ __u8 major;
+ __u8 minor;
+ __u8 hotfix;
+ __u16 build;
+} __attribute__((packed));
+
+
+struct heci_client {
+ __u32 max_msg_length;
+ __u8 protocol_version;
+} __attribute__((packed));
+
+/*
+ * HECI BUS Interface Section
+ */
+struct heci_msg_hdr {
+ __u32 me_addr:8;
+ __u32 host_addr:8;
+ __u32 length:9;
+ __u32 reserved:6;
+ __u32 msg_complete:1;
+} __attribute__((packed));
+
+
+struct hbm_cmd {
+ __u8 cmd:7;
+ __u8 is_response:1;
+} __attribute__((packed));
+
+
+struct heci_bus_message {
+ struct hbm_cmd cmd;
+ __u8 command_specific_data[];
+} __attribute__((packed));
+
+struct hbm_version {
+ __u8 minor_version;
+ __u8 major_version;
+} __attribute__((packed));
+
+struct hbm_host_version_request {
+ struct hbm_cmd cmd;
+ __u8 reserved;
+ struct hbm_version host_version;
+} __attribute__((packed));
+
+struct hbm_host_version_response {
+ struct hbm_cmd cmd;
+ int host_version_supported;
+ struct hbm_version me_max_version;
+} __attribute__((packed));
+
+struct hbm_host_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_stop_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_me_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_enum_request {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_host_enum_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+ __u8 valid_addresses[32];
+} __attribute__((packed));
+
+struct heci_client_properties {
+ struct guid protocol_name;
+ __u8 protocol_version;
+ __u8 max_number_of_connections;
+ __u8 fixed_address;
+ __u8 single_recv_buf;
+ __u32 max_msg_length;
+} __attribute__((packed));
+
+struct hbm_props_request {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+
+struct hbm_props_response {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 status;
+ __u8 reserved[1];
+ struct heci_client_properties client_properties;
+} __attribute__((packed));
+
+struct hbm_client_connect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved;
+} __attribute__((packed));
+
+struct hbm_client_connect_response {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 status;
+} __attribute__((packed));
+
+struct hbm_client_disconnect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[1];
+} __attribute__((packed));
+
+struct hbm_flow_control {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[HECI_FC_MESSAGE_RESERVED_LENGTH];
+} __attribute__((packed));
+
+struct heci_me_client {
+ struct heci_client_properties props;
+ __u8 client_id;
+ __u8 flow_ctrl_creds;
+} __attribute__((packed));
+
+/* private device struct */
+struct iamt_heci_device {
+ struct pci_dev *pdev; /* pointer to pci device struct */
+ /*
+ * lists of queues
+ */
+ /* array of pointers to aio lists */
+ struct io_heci_list *io_list_array[HECI_IO_LISTS_NUMBER];
+ struct io_heci_list read_list; /* driver read queue */
+ struct io_heci_list write_list; /* driver write queue */
+ struct io_heci_list write_waiting_list; /* write waiting queue */
+ struct io_heci_list ctrl_wr_list; /* managed write IOCTL list */
+ struct io_heci_list ctrl_rd_list; /* managed read IOCTL list */
+ struct io_heci_list pthi_cmd_list; /* PTHI list for cmd waiting */
+
+ /* driver managed PTHI list for reading completed pthi cmd data */
+ struct io_heci_list pthi_read_complete_list;
+ /*
+ * list of files
+ */
+ struct list_head file_list;
+ /*
+ * memory of device
+ */
+ unsigned int mem_base;
+ unsigned int mem_length;
+ char *mem_addr;
+ /*
+ * lock for the device
+ */
+ spinlock_t device_lock; /* device lock*/
+ struct work_struct work;
+ int recvd_msg;
+
+ struct task_struct *reinit_tsk;
+
+ struct timer_list wd_timer;
+ /*
+ * hw states of host and fw(ME)
+ */
+ __u32 host_hw_state;
+ __u32 me_hw_state;
+ /*
+ * waiting queue for receive message from FW
+ */
+ wait_queue_head_t wait_recvd_msg;
+ wait_queue_head_t wait_stop_wd;
+ /*
+ * heci device states
+ */
+ enum heci_states heci_state;
+ int stop;
+
+ __u32 extra_write_index;
+ __u32 rd_msg_buf[128]; /* used for control messages */
+ __u32 wr_msg_buf[128]; /* used for control messages */
+ __u32 ext_msg_buf[8]; /* for control responses */
+ __u32 rd_msg_hdr;
+
+ struct hbm_version version;
+
+ int host_buffer_is_empty;
+ struct heci_file_private wd_file_ext;
+ struct heci_me_client *me_clients; /* Note: memory has to be allocated*/
+ __u8 heci_me_clients[32]; /* list of existing clients */
+ __u8 num_heci_me_clients;
+ __u8 heci_host_clients[32]; /* list of existing clients */
+ __u8 current_host_client_id;
+
+ int wd_pending;
+ int wd_stoped;
+ __u16 wd_timeout; /* seconds ((wd_data[1] << 8) + wd_data[0]) */
+ unsigned char wd_data[HECI_START_WD_DATA_SIZE];
+
+
+ __u16 wd_due_counter;
+ int asf_mode;
+ int wd_bypass; /* if 1, don't refresh watchdog ME client */
+
+ struct file *iamthif_file_object;
+ struct heci_file_private iamthif_file_ext;
+ int iamthif_ioctl;
+ int iamthif_canceled;
+ __u32 iamthif_timer;
+ __u32 iamthif_stall_timer;
+ unsigned char iamthif_msg_buf[IAMTHIF_MTU];
+ __u32 iamthif_msg_buf_size;
+ __u32 iamthif_msg_buf_index;
+ int iamthif_flow_control_pending;
+ enum iamthif_states iamthif_state;
+
+ struct heci_cb_private *iamthif_current_cb;
+ __u8 write_hang;
+ int need_reset;
+ long open_handle_count;
+
+};
+
+/**
+ * read_heci_register - Read a byte from the heci device
+ *
+ * @dev: the device structure
+ * @offset: offset from which to read the data
+ *
+ * returns the byte read.
+ */
+static inline __u32 read_heci_register(struct iamt_heci_device *dev,
+ unsigned long offset)
+{
+ return readl(dev->mem_addr + offset);
+}
+
+/**
+ * write_heci_register - Write 4 bytes to the heci device
+ *
+ * @dev: the device structure
+ * @offset: offset from which to write the data
+ * @value: the byte to write
+ */
+static inline void write_heci_register(struct iamt_heci_device *dev,
+ unsigned long offset, __u32 value)
+{
+ writel(value, dev->mem_addr + offset);
+}
+
+#endif /* _HECI_DATA_STRUCTURES_H_ */
diff --git a/drivers/char/heci/heci_init.c b/drivers/char/heci/heci_init.c
new file mode 100644
index 0000000..87853a9
--- /dev/null
+++ b/drivers/char/heci/heci_init.c
@@ -0,0 +1,1077 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/moduleparam.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+
+#include "heci_data_structures.h"
+#include "heci_interface.h"
+#include "heci.h"
+
+
+const __u8 heci_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 };
+const __u8 heci_stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10 };
+
+const __u8 heci_wd_state_independence_msg[3][4] = {
+ {0x05, 0x02, 0x51, 0x10},
+ {0x05, 0x02, 0x52, 0x10},
+ {0x07, 0x02, 0x01, 0x10}
+};
+
+const struct guid heci_asf_guid = {
+ 0x75B30CD6, 0xA29E, 0x4AF7,
+ {0xA7, 0x12, 0xE6, 0x17, 0x43, 0x93, 0xC8, 0xA6}
+};
+const struct guid heci_wd_guid = {
+ 0x05B79A6F, 0x4628, 0x4D7F,
+ {0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB}
+};
+const struct guid heci_pthi_guid = {
+ 0x12f80028, 0xb4b7, 0x4b2d,
+ {0xac, 0xa8, 0x46, 0xe0, 0xff, 0x65, 0x81, 0x4c}
+};
+
+
+/*
+ * heci init function prototypes
+ */
+static void heci_check_asf_mode(struct iamt_heci_device *dev);
+static int host_start_message(struct iamt_heci_device *dev);
+static int host_enum_clients_message(struct iamt_heci_device *dev);
+static int allocate_me_clients_storage(struct iamt_heci_device *dev);
+static void host_init_wd(struct iamt_heci_device *dev);
+static void host_init_iamthif(struct iamt_heci_device *dev);
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout);
+
+
+/**
+ * heci_initialize_list - Sets up a queue list.
+ *
+ * @list: An instance of our list structure
+ * @dev: Device object for our driver
+ */
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev)
+{
+ /* initialize our queue list */
+ INIT_LIST_HEAD(&list->heci_cb.cb_list);
+ list->status = 0;
+ list->device_extension = dev;
+}
+
+/**
+ * heci_flush_queues - flush our queues list belong to file_ext.
+ *
+ * @dev: Device object for our driver
+ * @file_ext: private data of the file object
+ */
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int i;
+
+ if (!dev || !file_ext)
+ return;
+
+ /* flush our queue list belong to file_ext */
+ for (i = 0; i < HECI_IO_LISTS_NUMBER; i++) {
+ DBG("remove list entry belong to file_ext\n");
+ heci_flush_list(dev->io_list_array[i], file_ext);
+ }
+}
+
+
+/**
+ * heci_flush_list - remove list entry belong to file_ext.
+ *
+ * @list: An instance of our list structure
+ * @file_ext: private data of the file object
+ */
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext)
+{
+ struct heci_file_private *file_ext_tmp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if (!list || !file_ext)
+ return;
+
+ if (list->status != 0)
+ return;
+
+ if (list_empty(&list->heci_cb.cb_list))
+ return;
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &list->heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos) {
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext_tmp) {
+ if (heci_fe_same_id(file_ext, file_ext_tmp))
+ list_del(&priv_cb_pos->cb_list);
+ }
+ }
+ }
+}
+
+/**
+ * heci_reset_iamthif_params - initializes heci device iamthif
+ *
+ * @dev: The heci device structure
+ */
+static void heci_reset_iamthif_params(struct iamt_heci_device *dev)
+{
+ /* reset iamthif parameters. */
+ dev->iamthif_current_cb = NULL;
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_file_ext.file = NULL;
+ dev->iamthif_ioctl = 0;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+}
+
+/**
+ * init_heci_device - allocates and initializes the heci device structure
+ *
+ * @pdev: The pci device structure
+ *
+ * returns The heci_device_device pointer on success, NULL on failure.
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev)
+{
+ int i;
+ struct iamt_heci_device *dev;
+
+ dev = kzalloc(sizeof(struct iamt_heci_device), GFP_KERNEL);
+ if (!dev)
+ return NULL;
+
+ /* setup our list array */
+ dev->io_list_array[0] = &dev->read_list;
+ dev->io_list_array[1] = &dev->write_list;
+ dev->io_list_array[2] = &dev->write_waiting_list;
+ dev->io_list_array[3] = &dev->ctrl_wr_list;
+ dev->io_list_array[4] = &dev->ctrl_rd_list;
+ dev->io_list_array[5] = &dev->pthi_cmd_list;
+ dev->io_list_array[6] = &dev->pthi_read_complete_list;
+ INIT_LIST_HEAD(&dev->file_list);
+ INIT_LIST_HEAD(&dev->wd_file_ext.link);
+ INIT_LIST_HEAD(&dev->iamthif_file_ext.link);
+ spin_lock_init(&dev->device_lock);
+ init_waitqueue_head(&dev->wait_recvd_msg);
+ init_waitqueue_head(&dev->wait_stop_wd);
+ dev->heci_state = HECI_INITIALIZING;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+
+ /* init work for schedule work */
+ INIT_WORK(&dev->work, NULL);
+ for (i = 0; i < HECI_IO_LISTS_NUMBER; i++)
+ heci_initialize_list(dev->io_list_array[i], dev);
+ dev->pdev = pdev;
+ return dev;
+}
+
+
+
+
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout)
+{
+ return wait_event_interruptible_timeout(dev->wait_recvd_msg,
+ (dev->recvd_msg), timeout);
+}
+
+/**
+ * heci_hw_init - init host and fw to start work.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_hw_init(struct iamt_heci_device *dev)
+{
+ int err = 0;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ DBG("host_hw_state = 0x%08x, mestate = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ /* acknowledge interrupt and stop interupts */
+ heci_set_csr_register(dev);
+ }
+ dev->recvd_msg = 0;
+ DBG("reset in start the heci device.\n");
+
+ heci_reset(dev, 1);
+
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ /* wait for ME to turn on ME_RDY */
+ if (!dev->recvd_msg)
+ err = heci_wait_event_int_timeout(dev, HECI_INTEROP_TIMEOUT);
+
+ if (!err && !dev->recvd_msg) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("wait_event_interruptible_timeout failed"
+ "on wait for ME to turn on ME_RDY.\n");
+ return -ENODEV;
+ } else {
+ if (!(((dev->host_hw_state & H_RDY) == H_RDY)
+ && ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state,
+ dev->me_hw_state);
+
+ if (!(dev->host_hw_state & H_RDY) != H_RDY)
+ DBG("host turn off H_RDY.\n");
+
+ if (!(dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ DBG("ME turn off ME_RDY.\n");
+
+ printk(KERN_ERR
+ "heci: link layer initialization failed.\n");
+ return -ENODEV;
+ }
+ }
+ dev->recvd_msg = 0;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+ DBG("ME turn on ME_RDY and host turn on H_RDY.\n");
+ printk(KERN_INFO "heci: link layer has been established.\n");
+ return 0;
+}
+
+/**
+ * heci_hw_reset - reset fw via heci csr register.
+ *
+ * @dev: Device object for our driver
+ * @interrupts: if interrupt should be enable after reset.
+ */
+static void heci_hw_reset(struct iamt_heci_device *dev, int interrupts)
+{
+ dev->host_hw_state |= (H_RST | H_IG);
+
+ if (interrupts)
+ heci_csr_enable_interrupts(dev);
+ else
+ heci_csr_disable_interrupts(dev);
+
+ BUG_ON((dev->host_hw_state & H_RST) != H_RST);
+ BUG_ON((dev->host_hw_state & H_RDY) != 0);
+}
+
+/**
+ * heci_reset - reset host and fw.
+ *
+ * @dev: Device object for our driver
+ * @interrupts: if interrupt should be enable after reset.
+ */
+void heci_reset(struct iamt_heci_device *dev, int interrupts)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int unexpected = 0;
+
+ if (dev->heci_state == HECI_RECOVERING_FROM_RESET) {
+ dev->need_reset = 1;
+ return;
+ }
+
+ if (dev->heci_state != HECI_INITIALIZING &&
+ dev->heci_state != HECI_DISABLED &&
+ dev->heci_state != HECI_POWER_DOWN &&
+ dev->heci_state != HECI_POWER_UP)
+ unexpected = 1;
+
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+
+ DBG("before reset host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ heci_hw_reset(dev, interrupts);
+
+ dev->host_hw_state &= ~H_RST;
+ dev->host_hw_state |= H_IG;
+
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+
+ DBG("currently saved host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ dev->need_reset = 0;
+
+ if (dev->heci_state != HECI_INITIALIZING) {
+ if ((dev->heci_state != HECI_DISABLED) &&
+ (dev->heci_state != HECI_POWER_DOWN))
+ dev->heci_state = HECI_RESETING;
+
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->flow_ctrl_creds = 0;
+ file_pos->read_cb = NULL;
+ file_pos->timer_count = 0;
+ }
+ /* remove entry if already in list */
+ DBG("list del iamthif and wd file list.\n");
+ heci_remove_client_from_file_list(dev,
+ dev->wd_file_ext.host_client_id);
+
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+
+ heci_reset_iamthif_params(dev);
+ dev->wd_due_counter = 0;
+ dev->extra_write_index = 0;
+ }
+
+ dev->num_heci_me_clients = 0;
+ dev->rd_msg_hdr = 0;
+ dev->stop = 0;
+ dev->wd_pending = 0;
+
+ /* update the state of the registers after reset */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ DBG("after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if (unexpected)
+ printk(KERN_WARNING "heci: unexpected reset.\n");
+
+ /* Wake up all readings so they can be interrupted */
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (&file_pos->rx_wait &&
+ waitqueue_active(&file_pos->rx_wait)) {
+ printk(KERN_INFO "heci: Waking up client!\n");
+ wake_up_interruptible(&file_pos->rx_wait);
+ }
+ }
+ /* remove all waiting requests */
+ if (dev->write_list.status == 0 &&
+ !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos) {
+ list_del(&priv_cb_pos->cb_list);
+ heci_free_cb_private(priv_cb_pos);
+ }
+ }
+ }
+}
+
+/**
+ * heci_initialize_clients - heci communication initialization.
+ *
+ * @dev: Device object for our driver
+ */
+int heci_initialize_clients(struct iamt_heci_device *dev)
+{
+ int status;
+
+ msleep(100); /* FW needs time to be ready to talk with us */
+ DBG("link is established start sending messages.\n");
+ /* link is established start sending messages. */
+ status = host_start_message(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("start sending messages failed.\n");
+ return status;
+ }
+
+ /* enumerate clients */
+ status = host_enum_clients_message(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("enum clients failed.\n");
+ return status;
+ }
+ /* allocate storage for ME clients representation */
+ status = allocate_me_clients_storage(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->num_heci_me_clients = 0;
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("allocate clients failed.\n");
+ return status;
+ }
+
+ heci_check_asf_mode(dev);
+ /*heci initialization wd */
+ host_init_wd(dev);
+ /*heci initialization iamthif client */
+ host_init_iamthif(dev);
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->need_reset) {
+ dev->need_reset = 0;
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+
+ memset(dev->heci_host_clients, 0, sizeof(dev->heci_host_clients));
+ dev->open_handle_count = 0;
+ dev->heci_host_clients[0] |= 7;
+ dev->current_host_client_id = 3;
+ dev->heci_state = HECI_ENABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("initialization heci clients successful.\n");
+ return 0;
+}
+
+/**
+ * heci_task_initialize_clients - heci reinitialization task
+ *
+ * @data: Device object for our driver
+ */
+int heci_task_initialize_clients(void *data)
+{
+ int ret;
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->reinit_tsk != NULL) {
+ spin_unlock_bh(&dev->device_lock);
+ DBG("reinit task already started.\n");
+ return 0;
+ }
+ dev->reinit_tsk = current;
+ current->flags |= PF_NOFREEZE;
+ spin_unlock_bh(&dev->device_lock);
+
+ ret = heci_initialize_clients(dev);
+
+ spin_lock_bh(&dev->device_lock);
+ dev->reinit_tsk = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ return ret;
+}
+
+/**
+ * host_start_message - heci host send start message.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_start_message(struct iamt_heci_device *dev)
+{
+ long timeout = 60; /* 60 second */
+
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_version_request *host_start_req;
+ struct hbm_host_stop_request *host_stop_req;
+ int err = 0;
+
+ /* host start message */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_version_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_start_req =
+ (struct hbm_host_version_request *) &dev->wr_msg_buf[1];
+ memset(host_start_req, 0, sizeof(struct hbm_host_version_request));
+ host_start_req->cmd.cmd = HOST_START_REQ_CMD;
+ host_start_req->host_version.major_version = HBM_MAJOR_VERSION;
+ host_start_req->host_version.minor_version = HBM_MINOR_VERSION;
+ dev->recvd_msg = 0;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_start_req),
+ heci_hdr->length)) {
+ DBG("send version to fw fail.\n");
+ return -ENODEV;
+ }
+ DBG("call wait_event_interruptible_timeout for response message.\n");
+ /* wait for response */
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait_timeout failed on host start response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ DBG("wait_timeout successful on host start response message.\n");
+ if ((dev->version.major_version != HBM_MAJOR_VERSION) ||
+ (dev->version.minor_version != HBM_MINOR_VERSION)) {
+ /* send stop message */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_stop_req =
+ (struct hbm_host_stop_request *) &dev->wr_msg_buf[1];
+
+ memset(host_stop_req, 0, sizeof(struct hbm_host_stop_request));
+ host_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ host_stop_req->reason = DRIVER_STOP_REQUEST;
+ heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_stop_req),
+ heci_hdr->length);
+ DBG("version mismatch.\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/**
+ * host_enum_clients_message - host send enumeration client request message.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_enum_clients_message(struct iamt_heci_device *dev)
+{
+ long timeout = 5; /*5 second */
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_enum_request *host_enum_req;
+ int err = 0;
+ __u8 i, j;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ /* enumerate clients */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_enum_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1];
+ memset(host_enum_req, 0, sizeof(struct hbm_host_enum_request));
+ host_enum_req->cmd.cmd = HOST_ENUM_REQ_CMD;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_enum_req),
+ heci_hdr->length)) {
+ DBG("send enumeration request failed.\n");
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait_event_interruptible_timeout failed "
+ "on enumeration clients response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+
+ spin_lock_bh(&dev->device_lock);
+ /* count how many ME clients we have */
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0)
+ dev->num_heci_me_clients++;
+
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ return 0;
+}
+
+/**
+ * host_client_properties - reads properties for client
+ *
+ * @dev: Device object for our driver
+ * @idx: client index in me client array
+ * @client_id: id of the client
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_client_properties(struct iamt_heci_device *dev,
+ struct heci_me_client *client)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_props_request *host_cli_req;
+ int err;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_props_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_cli_req = (struct hbm_props_request *) &dev->wr_msg_buf[1];
+ memset(host_cli_req, 0, sizeof(struct hbm_props_request));
+ host_cli_req->cmd.cmd = HOST_CLIENT_PROPERTEIS_REQ_CMD;
+ host_cli_req->address = client->client_id;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_cli_req),
+ heci_hdr->length)) {
+ DBG("send props request failed.\n");
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev, 10 * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait failed on props resp msg.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ return 0;
+}
+
+/**
+ * allocate_me_clients_storage - allocate storage for me clients
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int allocate_me_clients_storage(struct iamt_heci_device *dev)
+{
+ struct heci_me_client *clients;
+ struct heci_me_client *client;
+ __u8 num, i, j;
+ int err;
+
+ if (dev->num_heci_me_clients <= 0)
+ return 0;
+
+ spin_lock_bh(&dev->device_lock);
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ /* allocate storage for ME clients representation */
+ clients = kcalloc(dev->num_heci_me_clients,
+ sizeof(struct heci_me_client), GFP_KERNEL);
+ if (!clients) {
+ DBG("memory allocation for ME clients failed.\n");
+ return -ENOMEM;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ dev->me_clients = clients;
+ spin_unlock_bh(&dev->device_lock);
+
+ num = 0;
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0) {
+ client = &dev->me_clients[num];
+ client->client_id = (i * 8) + j;
+ client->flow_ctrl_creds = 0;
+ err = host_client_properties(dev, client);
+ if (err != 0) {
+ spin_lock_bh(&dev->device_lock);
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+ spin_unlock_bh(&dev->device_lock);
+ return err;
+ }
+ num++;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * heci_init_file_private - initializes private file structure.
+ *
+ * @priv: private file structure to be initialized
+ * @file: the file structure
+ */
+static void heci_init_file_private(struct heci_file_private *priv,
+ struct file *file)
+{
+ memset(priv, 0, sizeof(struct heci_file_private));
+ spin_lock_init(&priv->file_lock);
+ spin_lock_init(&priv->read_io_lock);
+ spin_lock_init(&priv->write_io_lock);
+ init_waitqueue_head(&priv->wait);
+ init_waitqueue_head(&priv->rx_wait);
+ DBG("priv->rx_wait =%p\n", &priv->rx_wait);
+ init_waitqueue_head(&priv->tx_wait);
+ INIT_LIST_HEAD(&priv->link);
+ priv->reading_state = HECI_IDLE;
+ priv->writing_state = HECI_IDLE;
+}
+
+/**
+ * heci_find_me_client - search for ME client guid
+ * sets client_id in heci_file_private if found
+ * @dev: Device object for our driver
+ * @priv: private file structure to set client_id in
+ * @cguid: searched guid of ME client
+ * @client_id: id of host client to be set in file private structure
+ *
+ * returns ME client index
+ */
+static __u8 heci_find_me_client(struct iamt_heci_device *dev,
+ struct heci_file_private *priv,
+ const struct guid *cguid, __u8 client_id)
+{
+ __u8 i;
+
+ if ((dev == NULL) || (priv == NULL) || (cguid == NULL))
+ return 0;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(cguid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ priv->me_client_id = dev->me_clients[i].client_id;
+ priv->state = HECI_FILE_CONNECTING;
+ priv->host_client_id = client_id;
+
+ list_add_tail(&priv->link, &dev->file_list);
+ return i;
+ }
+ }
+ return 0;
+}
+
+/**
+ * heci_check_asf_mode - check for ASF client
+ *
+ * @dev: Device object for our driver
+ */
+static void heci_check_asf_mode(struct iamt_heci_device *dev)
+{
+ __u8 i;
+
+ spin_lock_bh(&dev->device_lock);
+ dev->asf_mode = 0;
+ /* find ME ASF client - otherwise assume AMT mode */
+ DBG("find ME ASF client - otherwise assume AMT mode.\n");
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_asf_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ dev->asf_mode = 1;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("found ME ASF client.\n");
+ return;
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+ DBG("assume AMT mode.\n");
+}
+
+/**
+ * heci_connect_me_client - connect ME client
+ * @dev: Device object for our driver
+ * @priv: private file structure
+ * @timeout: connect timeout in seconds
+ *
+ * returns 1 - if connected, 0 - if not
+ */
+static __u8 heci_connect_me_client(struct iamt_heci_device *dev,
+ struct heci_file_private *priv,
+ long timeout)
+{
+ int err = 0;
+
+ if ((dev == NULL) || (priv == NULL))
+ return 0;
+
+ if (!heci_connect(dev, priv)) {
+ DBG("failed to call heci_connect for client_id=%d.\n",
+ priv->host_client_id);
+ spin_lock_bh(&dev->device_lock);
+ heci_remove_client_from_file_list(dev, priv->host_client_id);
+ priv->state = HECI_FILE_DISCONNECTED;
+ spin_unlock_bh(&dev->device_lock);
+ return 0;
+ }
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == priv->state ||
+ HECI_FILE_DISCONNECTED == priv->state),
+ timeout * HZ);
+ if (HECI_FILE_CONNECTED != priv->state) {
+ spin_lock_bh(&dev->device_lock);
+ heci_remove_client_from_file_list(dev, priv->host_client_id);
+ DBG("failed to connect client_id=%d state=%d.\n",
+ priv->host_client_id, priv->state);
+ if (err)
+ DBG("failed connect err=%08x\n", err);
+ priv->state = HECI_FILE_DISCONNECTED;
+ spin_unlock_bh(&dev->device_lock);
+ return 0;
+ }
+ DBG("successfully connected client_id=%d.\n",
+ priv->host_client_id);
+ return 1;
+}
+
+/**
+ * host_init_wd - heci initialization wd.
+ *
+ * @dev: Device object for our driver
+ */
+static void host_init_wd(struct iamt_heci_device *dev)
+{
+ spin_lock_bh(&dev->device_lock);
+
+ heci_init_file_private(&dev->wd_file_ext, NULL);
+
+ /* look for WD client and connect to it */
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTED;
+ dev->wd_timeout = 0;
+
+ if (dev->asf_mode) {
+ memcpy(dev->wd_data, heci_stop_wd_params, HECI_WD_PARAMS_SIZE);
+ } else {
+ /* AMT mode */
+ dev->wd_timeout = AMT_WD_VALUE;
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ memcpy(dev->wd_data, heci_start_wd_params, HECI_WD_PARAMS_SIZE);
+ memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
+ &dev->wd_timeout, sizeof(__u16));
+ }
+
+ /* find ME WD client */
+ heci_find_me_client(dev, &dev->wd_file_ext,
+ &heci_wd_guid, HECI_WD_HOST_CLIENT_ID);
+ spin_unlock_bh(&dev->device_lock);
+
+ DBG("check wd_file_ext\n");
+ if (HECI_FILE_CONNECTING == dev->wd_file_ext.state) {
+ if (heci_connect_me_client(dev, &dev->wd_file_ext, 15) == 1) {
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 1;
+ else
+ dev->wd_due_counter = 0;
+ DBG("successfully connected to WD client.\n");
+ }
+ } else
+ DBG("failed to find WD client.\n");
+
+
+ spin_lock_bh(&dev->device_lock);
+ dev->wd_timer.function = &heci_wd_timer;
+ dev->wd_timer.data = (unsigned long) dev;
+ spin_unlock_bh(&dev->device_lock);
+}
+
+
+/**
+ * host_init_iamthif - heci initialization iamthif client.
+ *
+ * @dev: Device object for our driver
+ *
+ */
+static void host_init_iamthif(struct iamt_heci_device *dev)
+{
+ __u8 i;
+
+ spin_lock_bh(&dev->device_lock);
+
+ heci_init_file_private(&dev->iamthif_file_ext, NULL);
+ dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTED;
+
+ /* find ME PTHI client */
+ i = heci_find_me_client(dev, &dev->iamthif_file_ext,
+ &heci_pthi_guid, HECI_IAMTHIF_HOST_CLIENT_ID);
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTING) {
+ DBG("failed to find iamthif client.\n");
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ BUG_ON(dev->me_clients[i].props.max_msg_length != IAMTHIF_MTU);
+
+ spin_unlock_bh(&dev->device_lock);
+ if (heci_connect_me_client(dev, &dev->iamthif_file_ext, 15) == 1) {
+ DBG("connected to iamthif client.\n");
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ }
+}
+
+/**
+ * heci_alloc_file_private - allocates a private file structure and set it up.
+ * @file: the file structure
+ *
+ * returns The allocated file or NULL on failure
+ */
+struct heci_file_private *heci_alloc_file_private(struct file *file)
+{
+ struct heci_file_private *priv;
+
+ priv = kmalloc(sizeof(struct heci_file_private), GFP_KERNEL);
+ if (!priv)
+ return NULL;
+
+ heci_init_file_private(priv, file);
+
+ return priv;
+}
+
+
+
+/**
+ * heci_disconnect_host_client - send disconnect message to fw from host client.
+ *
+ * @dev: Device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int rets, err;
+ long timeout = 15; /* 15 seconds */
+ struct heci_cb_private *priv_cb;
+
+ if ((!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext->state != HECI_FILE_DISCONNECTING)
+ return 0;
+
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->file_private = file_ext;
+ priv_cb->major_file_operations = HECI_CLOSE;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (heci_disconnect(dev, file_ext)) {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ DBG("failed to call heci_disconnect.\n");
+ goto free;
+ }
+ } else {
+ DBG("add disconnect cb to control write list\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+ if (HECI_FILE_DISCONNECTED == file_ext->state) {
+ rets = 0;
+ DBG("successfully disconnected from fw client.\n");
+ } else {
+ rets = -ENODEV;
+ if (HECI_FILE_DISCONNECTED != file_ext->state)
+ DBG("wrong status client disconnect.\n");
+
+ if (err)
+ DBG("wait failed disconnect err=%08x\n", err);
+
+ DBG("failed to disconnect from fw client.\n");
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_list(&dev->ctrl_rd_list, file_ext);
+ heci_flush_list(&dev->ctrl_wr_list, file_ext);
+ spin_unlock_bh(&dev->device_lock);
+free:
+ heci_free_cb_private(priv_cb);
+ return rets;
+}
+
+/**
+ * heci_remove_client_from_file_list -
+ * remove file private data from device file list
+ *
+ * @dev: Device object for our driver
+ * @host_client_id: host client id to be removed
+ */
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (host_client_id == file_pos->host_client_id) {
+ DBG("remove host client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del_init(&file_pos->link);
+ break;
+ }
+ }
+}
diff --git a/drivers/char/heci/heci_interface.c b/drivers/char/heci/heci_interface.c
new file mode 100644
index 0000000..c5f51a7
--- /dev/null
+++ b/drivers/char/heci/heci_interface.c
@@ -0,0 +1,485 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include "heci.h"
+#include "heci_interface.h"
+
+
+/**
+ * heci_set_csr_register - write H_CSR register to the heci device
+ *
+ * @dev: device object for our driver
+ */
+void heci_set_csr_register(struct iamt_heci_device *dev)
+{
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+}
+
+/**
+ * heci_csr_enable_interrupts - enable heci device interrupts
+ *
+ * @dev: device object for our driver
+ */
+void heci_csr_enable_interrupts(struct iamt_heci_device *dev)
+{
+ dev->host_hw_state |= H_IE;
+ heci_set_csr_register(dev);
+}
+
+/**
+ * heci_csr_disable_interrupts - disable heci device interrupts
+ *
+ * @dev: device object for our driver
+ */
+void heci_csr_disable_interrupts(struct iamt_heci_device *dev)
+{
+ dev->host_hw_state &= ~H_IE;
+ heci_set_csr_register(dev);
+}
+
+
+/**
+ * _host_get_filled_slots - get number of device filled buffer slots
+ *
+ * @device: the device structure
+ *
+ * returns numer of filled slots
+ */
+static unsigned char _host_get_filled_slots(const struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+
+ read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8);
+ write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16);
+
+ return (unsigned char) (write_ptr - read_ptr);
+}
+
+/**
+ * host_buffer_is_empty - check if host buffer is empty.
+ *
+ * @dev: device object for our driver
+ *
+ * returns 1 if empty, 0 - otherwise.
+ */
+int host_buffer_is_empty(struct iamt_heci_device *dev)
+{
+ unsigned char filled_slots;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ filled_slots = _host_get_filled_slots(dev);
+
+ if (filled_slots > 0)
+ return 0;
+
+ return 1;
+}
+
+/**
+ * count_empty_write_slots - count write empty slots.
+ *
+ * @dev: device object for our driver
+ *
+ * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise empty slots count
+ */
+__s32 count_empty_write_slots(const struct iamt_heci_device *dev)
+{
+ unsigned char buffer_depth, filled_slots, empty_slots;
+
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = _host_get_filled_slots(dev);
+ empty_slots = buffer_depth - filled_slots;
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ return (__s32) empty_slots;
+}
+
+/**
+ * heci_write_message - write a message to heci device.
+ *
+ * @dev: device object for our driver
+ * @heci_hdr: header of message
+ * @write_buffer: message buffer will be write
+ * @write_length: message size will be write
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length)
+{
+ __u32 temp_msg = 0;
+ unsigned long bytes_written = 0;
+ unsigned char buffer_depth, filled_slots, empty_slots;
+ unsigned long dw_to_write;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ DBG("host_hw_state = 0x%08x.\n", dev->host_hw_state);
+ DBG("heci_write_message header=%08x.\n", *((__u32 *) header));
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = _host_get_filled_slots(dev);
+ empty_slots = buffer_depth - filled_slots;
+ DBG("filled = %hu, empty = %hu.\n", filled_slots, empty_slots);
+
+ dw_to_write = ((write_length + 3) / 4);
+
+ if (dw_to_write > empty_slots)
+ return 0;
+
+ write_heci_register(dev, H_CB_WW, *((__u32 *) header));
+
+ while (write_length >= 4) {
+ write_heci_register(dev, H_CB_WW,
+ *(__u32 *) (write_buffer + bytes_written));
+ bytes_written += 4;
+ write_length -= 4;
+ }
+
+ if (write_length > 0) {
+ memcpy(&temp_msg, &write_buffer[bytes_written], write_length);
+ write_heci_register(dev, H_CB_WW, temp_msg);
+ }
+
+ dev->host_hw_state |= H_IG;
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ if ((dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ return 0;
+
+ dev->write_hang = 0;
+ return 1;
+}
+
+/**
+ * count_full_read_slots - count read full slots.
+ *
+ * @dev: device object for our driver
+ *
+ * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise filled slots count
+ */
+__s32 count_full_read_slots(struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+ unsigned char buffer_depth, filled_slots;
+
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ buffer_depth = (unsigned char)((dev->me_hw_state & ME_CBD_HRA) >> 24);
+ read_ptr = (char) ((dev->me_hw_state & ME_CBRP_HRA) >> 8);
+ write_ptr = (char) ((dev->me_hw_state & ME_CBWP_HRA) >> 16);
+ filled_slots = (unsigned char) (write_ptr - read_ptr);
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ DBG("filled_slots =%08x \n", filled_slots);
+ return (__s32) filled_slots;
+}
+
+/**
+ * heci_read_slots - read a message from heci device.
+ *
+ * @dev: device object for our driver
+ * @buffer: message buffer will be write
+ * @buffer_length: message size will be read
+ */
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length)
+{
+ __u32 i = 0;
+ unsigned char temp_buf[sizeof(__u32)];
+
+ while (buffer_length >= sizeof(__u32)) {
+ ((__u32 *) buffer)[i] = read_heci_register(dev, ME_CB_RW);
+ DBG("buffer[%d]= %d\n", i, ((__u32 *) buffer)[i]);
+ i++;
+ buffer_length -= sizeof(__u32);
+ }
+
+ if (buffer_length > 0) {
+ *((__u32 *) &temp_buf) = read_heci_register(dev, ME_CB_RW);
+ memcpy(&buffer[i * 4], temp_buf, buffer_length);
+ }
+
+ dev->host_hw_state |= H_IG;
+ heci_set_csr_register(dev);
+}
+
+/**
+ * flow_ctrl_creds - check flow_control credentials.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if flow_ctrl_creds >0, 0 - otherwise.
+ */
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return 0;
+
+ if (file_ext == NULL)
+ return 0;
+
+ if (file_ext->flow_ctrl_creds > 0)
+ return 1;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].flow_ctrl_creds > 0) {
+ BUG_ON(dev->me_clients[i].props.single_recv_buf
+ == 0);
+ return 1;
+ }
+ return 0;
+ }
+ }
+ BUG();
+ return 0;
+}
+
+/**
+ * flow_ctrl_reduce - reduce flow_control.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ */
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].props.single_recv_buf != 0) {
+ BUG_ON(dev->me_clients[i].flow_ctrl_creds <= 0);
+ dev->me_clients[i].flow_ctrl_creds--;
+ } else {
+ BUG_ON(file_ext->flow_ctrl_creds <= 0);
+ file_ext->flow_ctrl_creds--;
+ }
+ return;
+ }
+ }
+ BUG();
+}
+
+/**
+ * heci_send_flow_control - send flow control to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_flow_control *heci_flow_control;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_flow_control);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_flow_control = (struct hbm_flow_control *) &dev->wr_msg_buf[1];
+ memset(heci_flow_control, 0, sizeof(heci_flow_control));
+ heci_flow_control->host_addr = file_ext->host_client_id;
+ heci_flow_control->me_addr = file_ext->me_client_id;
+ heci_flow_control->cmd.cmd = HECI_FLOW_CONTROL_CMD;
+ memset(heci_flow_control->reserved, 0,
+ sizeof(heci_flow_control->reserved));
+ DBG("sending flow control host client = %d, me client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_flow_control,
+ sizeof(struct hbm_flow_control)))
+ return 0;
+
+ return 1;
+
+}
+
+/**
+ * other_client_is_connecting - check if other
+ * client with the same client id is connected.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if other client is connected, 0 - otherwise.
+ */
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if ((file_pos->state == HECI_FILE_CONNECTING)
+ && (file_pos != file_ext)
+ && file_ext->me_client_id == file_pos->me_client_id)
+ return 1;
+
+ }
+ return 0;
+}
+
+/**
+ * heci_send_wd - send watch dog message to fw.
+ *
+ * @dev: device object for our driver
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_send_wd(struct iamt_heci_device *dev)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = dev->wd_file_ext.host_client_id;
+ heci_hdr->me_addr = dev->wd_file_ext.me_client_id;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ if (!memcmp(dev->wd_data, heci_start_wd_params,
+ HECI_WD_PARAMS_SIZE)) {
+ heci_hdr->length = HECI_START_WD_DATA_SIZE;
+ } else {
+ BUG_ON(memcmp(dev->wd_data, heci_stop_wd_params,
+ HECI_WD_PARAMS_SIZE));
+ heci_hdr->length = HECI_WD_PARAMS_SIZE;
+ }
+
+ if (!heci_write_message(dev, heci_hdr, dev->wd_data, heci_hdr->length))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_disconnect - send disconnect message to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_disconnect_request *heci_cli_disconnect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_disconnect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_disconnect =
+ (struct hbm_client_disconnect_request *) &dev->wr_msg_buf[1];
+ memset(heci_cli_disconnect, 0, sizeof(heci_cli_disconnect));
+ heci_cli_disconnect->host_addr = file_ext->host_client_id;
+ heci_cli_disconnect->me_addr = file_ext->me_client_id;
+ heci_cli_disconnect->cmd.cmd = CLIENT_DISCONNECT_REQ_CMD;
+ heci_cli_disconnect->reserved[0] = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_disconnect,
+ sizeof(struct hbm_client_disconnect_request)))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_connect - send connect message to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_request *heci_cli_connect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_connect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_connect =
+ (struct hbm_client_connect_request *) &dev->wr_msg_buf[1];
+ heci_cli_connect->host_addr = file_ext->host_client_id;
+ heci_cli_connect->me_addr = file_ext->me_client_id;
+ heci_cli_connect->cmd.cmd = CLIENT_CONNECT_REQ_CMD;
+ heci_cli_connect->reserved = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_connect,
+ sizeof(struct hbm_client_connect_request)))
+ return 0;
+
+ return 1;
+}
diff --git a/drivers/char/heci/heci_interface.h b/drivers/char/heci/heci_interface.h
new file mode 100644
index 0000000..37336eb
--- /dev/null
+++ b/drivers/char/heci/heci_interface.h
@@ -0,0 +1,170 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#ifndef _HECI_INTERFACE_H_
+#define _HECI_INTERFACE_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+
+#define HBM_MINOR_VERSION 0
+#define HBM_MAJOR_VERSION 1
+#define HBM_TIMEOUT 1 /* 1 second */
+
+
+#define HOST_START_REQ_CMD 0x01
+#define HOST_START_RES_CMD 0x81
+
+#define HOST_STOP_REQ_CMD 0x02
+#define HOST_STOP_RES_CMD 0x82
+
+#define ME_STOP_REQ_CMD 0x03
+
+#define HOST_ENUM_REQ_CMD 0x04
+#define HOST_ENUM_RES_CMD 0x84
+
+#define HOST_CLIENT_PROPERTEIS_REQ_CMD 0x05
+#define HOST_CLIENT_PROPERTEIS_RES_CMD 0x85
+
+#define CLIENT_CONNECT_REQ_CMD 0x06
+#define CLIENT_CONNECT_RES_CMD 0x86
+
+#define CLIENT_DISCONNECT_REQ_CMD 0x07
+#define CLIENT_DISCONNECT_RES_CMD 0x87
+
+#define HECI_FLOW_CONTROL_CMD 0x08
+
+
+#define AMT_WD_VALUE 120 /* seconds */
+
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+
+/* IOCTL commands */
+#define IOCTL_HECI_GET_VERSION \
+ _IOWR('H' , 0x0, struct heci_message_data)
+#define IOCTL_HECI_CONNECT_CLIENT \
+ _IOWR('H' , 0x01, struct heci_message_data)
+#define IOCTL_HECI_WD \
+ _IOWR('H' , 0x02, struct heci_message_data)
+#define IOCTL_HECI_BYPASS_WD \
+ _IOWR('H' , 0x10, struct heci_message_data)
+
+enum heci_stop_reason_types{
+ DRIVER_STOP_REQUEST = 0x00,
+ DEVICE_D1_ENTRY = 0x01,
+ DEVICE_D2_ENTRY = 0x02,
+ DEVICE_D3_ENTRY = 0x03,
+ SYSTEM_S1_ENTRY = 0x04,
+ SYSTEM_S2_ENTRY = 0x05,
+ SYSTEM_S3_ENTRY = 0x06,
+ SYSTEM_S4_ENTRY = 0x07,
+ SYSTEM_S5_ENTRY = 0x08
+};
+
+enum me_stop_reason_types{
+ FW_UPDATE = 0x00
+};
+
+enum client_connect_status_types{
+ CCS_SUCCESS = 0x00,
+ CCS_NOT_FOUND = 0x01,
+ CCS_ALREADY_STARTED = 0x02,
+ CCS_OUT_OF_RESOURCES = 0x03,
+ CCS_MESSAGE_SMALL = 0x04
+};
+
+enum client_disconnect_status_types{
+ CDS_SUCCESS = 0x00
+};
+
+
+/*
+ * heci interface function prototypes
+ */
+void heci_set_csr_register(struct iamt_heci_device *dev);
+void heci_csr_enable_interrupts(struct iamt_heci_device *dev);
+void heci_csr_disable_interrupts(struct iamt_heci_device *dev);
+
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length);
+
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length);
+
+int host_buffer_is_empty(struct iamt_heci_device *dev);
+
+__s32 count_full_read_slots(struct iamt_heci_device *dev);
+
+__s32 count_empty_write_slots(const struct iamt_heci_device *dev);
+
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_wd(struct iamt_heci_device *dev);
+
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+#endif /* _HECI_INTERFACE_H_ */
diff --git a/drivers/char/heci/heci_main.c b/drivers/char/heci/heci_main.c
new file mode 100644
index 0000000..9eaa828
--- /dev/null
+++ b/drivers/char/heci/heci_main.c
@@ -0,0 +1,1562 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/device.h>
+#include <linux/unistd.h>
+#include <linux/kthread.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+#define HECI_READ_TIMEOUT 45
+
+#define HECI_DRIVER_NAME "heci"
+
+/*
+ * heci driver strings
+ */
+char heci_driver_name[] = HECI_DRIVER_NAME;
+char heci_driver_string[] = "Intel(R) Management Engine Interface";
+char heci_driver_version[] = HECI_DRIVER_VERSION;
+char heci_copyright[] = "Copyright (c) 2003 - 2008 Intel Corporation.";
+
+
+#ifdef HECI_DEBUG
+int heci_debug = 1;
+#else
+int heci_debug;
+#endif
+MODULE_PARM_DESC(heci_debug, "Debug enabled or not");
+module_param(heci_debug, int, 0644);
+
+
+#define HECI_DEV_NAME "heci"
+
+/* heci char device for registration */
+static struct cdev heci_cdev;
+
+/* major number for device */
+static int heci_major;
+/* The device pointer */
+static struct pci_dev *heci_device;
+
+struct class *heci_class;
+struct device *heci_dev;
+
+
+/* heci_pci_tbl - PCI Device ID Table */
+static struct pci_device_id heci_pci_tbl[] = {
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82946GZ)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82Q965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GM965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GME965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82G33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82X38)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_3200)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_6)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_7)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_8)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_9)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_10)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_4)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_4)},
+ /* required last entry */
+ {0, }
+};
+
+MODULE_DEVICE_TABLE(pci, heci_pci_tbl);
+
+/*
+ * Local Function Prototypes
+ */
+static int __init heci_init_module(void);
+static void __exit heci_exit_module(void);
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent);
+static void __devexit heci_remove(struct pci_dev *pdev);
+static int heci_open(struct inode *inode, struct file *file);
+static int heci_release(struct inode *inode, struct file *file);
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset);
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data);
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset);
+static unsigned int heci_poll(struct file *file, poll_table *wait);
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state);
+static int heci_resume(struct pci_dev *pdev);
+static __u16 g_sus_wd_timeout;
+#else
+#define heci_suspend NULL
+#define heci_resume NULL
+#endif
+/*
+ * PCI driver structure
+ */
+static struct pci_driver heci_driver = {
+ .name = heci_driver_name,
+ .id_table = heci_pci_tbl,
+ .probe = heci_probe,
+ .remove = __devexit_p(heci_remove),
+ .shutdown = __devexit_p(heci_remove),
+ .suspend = heci_suspend,
+ .resume = heci_resume
+};
+
+/*
+ * file operations structure will be use heci char device.
+ */
+static struct file_operations heci_fops = {
+ .owner = THIS_MODULE,
+ .read = heci_read,
+ .ioctl = heci_ioctl,
+ .open = heci_open,
+ .release = heci_release,
+ .write = heci_write,
+ .poll = heci_poll,
+};
+
+/**
+ * heci_registration_cdev - set up the cdev structure for heci device.
+ *
+ * @dev: char device struct
+ * @hminor: minor number for registration char device
+ * @fops: file operations structure
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_registration_cdev(struct cdev *dev, int hminor,
+ struct file_operations *fops)
+{
+ int ret, devno = MKDEV(heci_major, hminor);
+
+ cdev_init(dev, fops);
+ dev->owner = THIS_MODULE;
+ ret = cdev_add(dev, devno, 1);
+ /* Fail gracefully if need be */
+ if (ret) {
+ printk(KERN_ERR "heci: Error %d registering heci device %d\n",
+ ret, hminor);
+ }
+ return ret;
+}
+
+/* Display the version of heci driver. */
+static ssize_t version_show(struct class *dev, char *buf)
+{
+ return sprintf(buf, "%s %s.\n",
+ heci_driver_string, heci_driver_version);
+}
+
+static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
+
+/**
+ * heci_register_cdev - registers heci char device
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_register_cdev(void)
+{
+ int ret;
+ dev_t dev;
+
+ /* registration of char devices */
+ ret = alloc_chrdev_region(&dev, HECI_MINORS_BASE, HECI_MINORS_COUNT,
+ HECI_DRIVER_NAME);
+ if (ret) {
+ printk(KERN_ERR "heci: Error allocating char device region.\n");
+ return ret;
+ }
+
+ heci_major = MAJOR(dev);
+
+ ret = heci_registration_cdev(&heci_cdev, HECI_MINOR_NUMBER,
+ &heci_fops);
+ if (ret)
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+
+ return ret;
+}
+
+/**
+ * heci_unregister_cdev - unregisters heci char device
+ */
+static void heci_unregister_cdev(void)
+{
+ cdev_del(&heci_cdev);
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+}
+
+/**
+ * heci_sysfs_device_create - adds device entry to sysfs
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_sysfs_device_create(void)
+{
+ struct class *class;
+ struct device *tmphdev;
+ int err = 0;
+
+ class = class_create(THIS_MODULE, HECI_DRIVER_NAME);
+ if (IS_ERR(class)) {
+ err = PTR_ERR(class);
+ printk(KERN_ERR "heci: Error creating heci class.\n");
+ goto err_out;
+ }
+
+ err = class_create_file(class, &class_attr_version);
+ if (err) {
+ class_destroy(class);
+ printk(KERN_ERR "heci: Error creating heci class file.\n");
+ goto err_out;
+ }
+
+ tmphdev = device_create(class, NULL, heci_cdev.dev, HECI_DEV_NAME);
+ if (IS_ERR(tmphdev)) {
+ err = PTR_ERR(tmphdev);
+ class_remove_file(class, &class_attr_version);
+ class_destroy(class);
+ goto err_out;
+ }
+
+ heci_dev = tmphdev;
+ heci_class = class;
+err_out:
+ return err;
+}
+
+/**
+ * heci_sysfs_device_remove - unregisters the device entry on sysfs
+ */
+static void heci_sysfs_device_remove(void)
+{
+ if ((heci_class == NULL) || (IS_ERR(heci_class)))
+ return;
+
+ heci_dev = NULL;
+ device_destroy(heci_class, heci_cdev.dev);
+ class_remove_file(heci_class, &class_attr_version);
+ class_destroy(heci_class);
+}
+
+/**
+ * heci_init_module - Driver Registration Routine
+ *
+ * heci_init_module is the first routine called when the driver is
+ * loaded. All it does is register with the PCI subsystem.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int __init heci_init_module(void)
+{
+ int ret = 0;
+
+ printk(KERN_INFO "heci: %s - version %s\n", heci_driver_string,
+ heci_driver_version);
+ printk(KERN_INFO "heci: %s\n", heci_copyright);
+
+ /* init pci module */
+ ret = pci_register_driver(&heci_driver);
+ if (ret < 0) {
+ printk(KERN_ERR "heci: Error registering driver.\n");
+ goto end;
+ }
+
+ ret = heci_register_cdev();
+ if (ret)
+ goto unregister_pci;
+
+ ret = heci_sysfs_device_create();
+ if (ret)
+ goto unregister_cdev;
+
+ return ret;
+
+unregister_cdev:
+ heci_unregister_cdev();
+unregister_pci:
+ pci_unregister_driver(&heci_driver);
+end:
+ return ret;
+}
+
+module_init(heci_init_module);
+
+
+/**
+ * heci_exit_module - Driver Exit Cleanup Routine
+ *
+ * heci_exit_module is called just before the driver is removed
+ * from memory.
+ */
+static void __exit heci_exit_module(void)
+{
+ pci_unregister_driver(&heci_driver);
+ heci_sysfs_device_remove();
+ heci_unregister_cdev();
+}
+
+module_exit(heci_exit_module);
+
+
+/**
+ * heci_probe - Device Initialization Routine
+ *
+ * @pdev: PCI device information struct
+ * @ent: entry in kcs_pci_tbl
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct iamt_heci_device *dev = NULL;
+ int i, err = 0;
+
+ if (heci_device) {
+ err = -EEXIST;
+ goto end;
+ }
+ /* enable pci dev */
+ err = pci_enable_device(pdev);
+ if (err) {
+ printk(KERN_ERR "heci: Failed to enable pci device.\n");
+ goto end;
+ }
+ /* set PCI host mastering */
+ pci_set_master(pdev);
+ /* pci request regions for heci driver */
+ err = pci_request_regions(pdev, heci_driver_name);
+ if (err) {
+ printk(KERN_ERR "heci: Failed to get pci regions.\n");
+ goto disable_device;
+ }
+ /* allocates and initializes the heci dev structure */
+ dev = init_heci_device(pdev);
+ if (!dev) {
+ err = -ENOMEM;
+ goto release_regions;
+ }
+ /* mapping IO device memory */
+ for (i = 0; i <= 5; i++) {
+ if (pci_resource_len(pdev, i) == 0)
+ continue;
+ if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
+ printk(KERN_ERR "heci: heci has IO ports.\n");
+ goto free_device;
+ } else if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
+ if (dev->mem_base) {
+ printk(KERN_ERR
+ "heci: Too many mem addresses.\n");
+ goto free_device;
+ }
+ dev->mem_base = pci_resource_start(pdev, i);
+ dev->mem_length = pci_resource_len(pdev, i);
+ }
+ }
+ if (!dev->mem_base) {
+ printk(KERN_ERR "heci: No address to use.\n");
+ err = -ENODEV;
+ goto free_device;
+ }
+ dev->mem_addr = ioremap_nocache(dev->mem_base,
+ dev->mem_length);
+ if (!dev->mem_addr) {
+ printk(KERN_ERR "heci: Remap IO device memory failure.\n");
+ err = -ENOMEM;
+ goto free_device;
+ }
+ /* request and enable interrupt */
+ err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, dev);
+ if (err) {
+ printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
+ pdev->irq);
+ goto unmap_memory;
+ }
+
+ if (heci_hw_init(dev)) {
+ printk(KERN_ERR "heci: Init hw failure.\n");
+ err = -ENODEV;
+ goto release_irq;
+ }
+ init_timer(&dev->wd_timer);
+
+ heci_initialize_clients(dev);
+ if (dev->heci_state != HECI_ENABLED) {
+ err = -ENODEV;
+ goto release_hw;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ heci_device = pdev;
+ pci_set_drvdata(pdev, dev);
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->wd_timeout)
+ mod_timer(&dev->wd_timer, jiffies);
+
+#ifdef CONFIG_PM
+ g_sus_wd_timeout = 0;
+#endif
+ printk(KERN_INFO "heci driver initialization successful.\n");
+ return 0;
+
+release_hw:
+ /* disable interrupts */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ heci_csr_disable_interrupts(dev);
+
+ del_timer_sync(&dev->wd_timer);
+
+ flush_scheduled_work();
+
+release_irq:
+ free_irq(pdev->irq, dev);
+unmap_memory:
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+free_device:
+ kfree(dev);
+release_regions:
+ pci_release_regions(pdev);
+disable_device:
+ pci_disable_device(pdev);
+end:
+ printk(KERN_ERR "heci driver initialization failed.\n");
+ return err;
+}
+
+/**
+ * heci_remove - Device Removal Routine
+ *
+ * @pdev: PCI device information struct
+ *
+ * heci_remove is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.
+ */
+static void __devexit heci_remove(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *dev = pci_get_drvdata(pdev);
+
+ if (heci_device != pdev)
+ return;
+
+ if (dev == NULL)
+ return;
+
+ spin_lock_bh(&dev->device_lock);
+ if (heci_device != pdev) {
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+
+ del_timer_sync(&dev->wd_timer);
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
+ && dev->wd_timeout) {
+ dev->wd_timeout = 0;
+ dev->wd_due_counter = 0;
+ memcpy(dev->wd_data, heci_stop_wd_params, HECI_WD_PARAMS_SIZE);
+ dev->stop = 1;
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+
+ if (!heci_send_wd(dev))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+ } else {
+ dev->wd_pending = 1;
+ }
+ dev->wd_stoped = 0;
+ spin_unlock_bh(&dev->device_lock);
+
+ wait_event_interruptible_timeout(dev->wait_stop_wd,
+ (dev->wd_stoped), 10 * HZ);
+ spin_lock_bh(&dev->device_lock);
+ if (!dev->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else
+ DBG("stop wd complete.\n");
+
+ }
+
+ heci_device = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->iamthif_file_ext.state == HECI_FILE_CONNECTED) {
+ dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->iamthif_file_ext);
+ }
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED) {
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->wd_file_ext);
+ }
+
+ spin_lock_bh(&dev->device_lock);
+
+ /* remove entry if already in list */
+ DBG("list del iamthif and wd file list.\n");
+ heci_remove_client_from_file_list(dev, dev->wd_file_ext.
+ host_client_id);
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+
+ dev->iamthif_current_cb = NULL;
+ dev->iamthif_file_ext.file = NULL;
+ dev->num_heci_me_clients = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ flush_scheduled_work();
+
+ /* disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ free_irq(pdev->irq, dev);
+ pci_set_drvdata(pdev, NULL);
+
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+
+ kfree(dev);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+}
+
+/**
+ * heci_clear_list - remove all callbacks associated with file
+ * from heci_cb_list
+ *
+ * @file: file information struct
+ * @heci_cb_list: callbacks list
+ *
+ * heci_clear_list is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * returns 1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_list(struct iamt_heci_device *dev,
+ struct file *file, struct list_head *heci_cb_list)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private*priv_cb_next = NULL;
+ struct file *file_temp;
+ int rets = 0;
+
+ /* list all list member */
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ heci_cb_list, cb_list) {
+ file_temp = (struct file *)priv_cb_pos->file_object;
+ /* check if list member associated with a file */
+ if (file_temp == file) {
+ /* remove member from the list */
+ list_del(&priv_cb_pos->cb_list);
+ /* check if cb equal to current iamthif cb */
+ if (dev->iamthif_current_cb == priv_cb_pos) {
+ dev->iamthif_current_cb = NULL;
+ /* send flow control to iamthif client */
+ heci_send_flow_control(dev,
+ &dev->iamthif_file_ext);
+ }
+ /* free all allocated buffers */
+ heci_free_cb_private(priv_cb_pos);
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_clear_lists - remove all callbacks associated with file
+ *
+ * @dev: device information struct
+ * @file: file information struct
+ *
+ * heci_clear_lists is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * returns 1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_lists(struct iamt_heci_device *dev, struct file *file)
+{
+ int rets = 0;
+
+ /* remove callbacks associated with a file */
+ heci_clear_list(dev, file, &dev->pthi_cmd_list.heci_cb.cb_list);
+ if (heci_clear_list(dev, file,
+ &dev->pthi_read_complete_list.heci_cb.cb_list))
+ rets = 1;
+
+ heci_clear_list(dev, file, &dev->ctrl_rd_list.heci_cb.cb_list);
+
+ if (heci_clear_list(dev, file, &dev->ctrl_wr_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file,
+ &dev->write_waiting_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file, &dev->write_list.heci_cb.cb_list))
+ rets = 1;
+
+ /* check if iamthif_current_cb not NULL */
+ if (dev->iamthif_current_cb && (!rets)) {
+ /* check file and iamthif current cb association */
+ if (dev->iamthif_current_cb->file_object == file) {
+ /* remove cb */
+ heci_free_cb_private(dev->iamthif_current_cb);
+ dev->iamthif_current_cb = NULL;
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_open - the open function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ *
+ * returns 0 on success, <0 on error
+ */
+static int heci_open(struct inode *inode, struct file *file)
+{
+ struct heci_file_private *file_ext;
+ int if_num = iminor(inode);
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ file_ext = heci_alloc_file_private(file);
+ if (file_ext == NULL)
+ return -ENOMEM;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENODEV;
+ }
+ if (dev->open_handle_count >= HECI_MAX_OPEN_HANDLE_COUNT) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENFILE;
+ };
+ dev->open_handle_count++;
+ list_add_tail(&file_ext->link, &dev->file_list);
+ while ((dev->heci_host_clients[dev->current_host_client_id / 8]
+ & (1 << (dev->current_host_client_id % 8))) != 0) {
+
+ dev->current_host_client_id++; /* allow overflow */
+ DBG("current_host_client_id = %d\n",
+ dev->current_host_client_id);
+ DBG("dev->open_handle_count = %lu\n",
+ dev->open_handle_count);
+ }
+ DBG("current_host_client_id = %d\n", dev->current_host_client_id);
+ file_ext->host_client_id = dev->current_host_client_id;
+ dev->heci_host_clients[file_ext->host_client_id / 8] |=
+ (1 << (file_ext->host_client_id % 8));
+ spin_unlock_bh(&dev->device_lock);
+ spin_lock(&file_ext->file_lock);
+ file_ext->state = HECI_FILE_INITIALIZING;
+ file_ext->sm_state = 0;
+
+ file->private_data = file_ext;
+ spin_unlock(&file_ext->file_lock);
+
+ return 0;
+}
+
+/**
+ * heci_release - the release function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ *
+ * returns 0 on success, <0 on error
+ */
+static int heci_release(struct inode *inode, struct file *file)
+{
+ int rets = 0;
+ int if_num = iminor(inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext != &dev->iamthif_file_ext) {
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state == HECI_FILE_CONNECTED) {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ spin_unlock(&file_ext->file_lock);
+ DBG("disconnecting client host client = %d, "
+ "ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+ rets = heci_disconnect_host_client(dev, file_ext);
+ spin_lock(&file_ext->file_lock);
+ }
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_queues(dev, file_ext);
+ DBG("remove client host client = %d, ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ if (dev->open_handle_count > 0) {
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ dev->open_handle_count--;
+ }
+ heci_remove_client_from_file_list(dev,
+ file_ext->host_client_id);
+
+ /* free read cb */
+ if (file_ext->read_cb != NULL) {
+ priv_cb = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb != NULL)
+ list_del(&priv_cb->cb_list);
+
+ priv_cb = file_ext->read_cb;
+ file_ext->read_cb = NULL;
+ }
+
+ spin_unlock_bh(&dev->device_lock);
+ file->private_data = NULL;
+ spin_unlock(&file_ext->file_lock);
+
+ if (priv_cb != NULL)
+ heci_free_cb_private(priv_cb);
+
+ kfree(file_ext);
+ } else {
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->open_handle_count > 0)
+ dev->open_handle_count--;
+
+ if (dev->iamthif_file_object == file
+ && dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi canceled iamthif state %d\n",
+ dev->iamthif_state);
+ dev->iamthif_canceled = 1;
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE) {
+ DBG("run next pthi iamthif cb\n");
+ run_next_iamthif_cmd(dev);
+ }
+ }
+
+ if (heci_clear_lists(dev, file))
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+
+ spin_unlock_bh(&dev->device_lock);
+ }
+ return rets;
+}
+
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ struct heci_file_private *file_ext_list_temp;
+
+ if (dev->read_list.status == 0
+ && !list_empty(&dev->read_list.heci_cb.cb_list)) {
+ DBG("remove read_list CB \n");
+ list_for_each_entry_safe(priv_cb_pos,
+ priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+
+ file_ext_list_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext_list_temp != NULL) &&
+ heci_fe_same_id(file_ext, file_ext_list_temp))
+ return priv_cb_pos;
+
+ }
+ }
+ return NULL;
+}
+
+/**
+ * heci_read - the read client message function.
+ *
+ * @file: pointer to file structure
+ * @ubuf: pointer to user buffer
+ * @length: buffer length
+ * @offset: data offset in buffer
+ *
+ * returns >=0 data length on success , <0 on error
+ */
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int i;
+ int rets = 0, err = 0;
+ int if_num = iminor(file->f_dentry->d_inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ spin_lock(&file_ext->file_lock);
+ if ((file_ext->sm_state & HECI_WD_STATE_INDEPENDENCE_MSG_SENT) == 0) {
+ spin_unlock(&file_ext->file_lock);
+ /* Do not allow to read watchdog client */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_wd_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (file_ext->me_client_id ==
+ dev->me_clients[i].client_id)
+ return -EBADF;
+ }
+ }
+ } else {
+ file_ext->sm_state &= ~HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+ }
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ rets = pthi_read(dev, if_num, file, ubuf, length, offset);
+ goto out;
+ }
+
+ if (file_ext->read_cb && file_ext->read_cb->information > *offset) {
+ priv_cb = file_ext->read_cb;
+ goto copy_buffer;
+ } else if (file_ext->read_cb && file_ext->read_cb->information > 0 &&
+ file_ext->read_cb->information <= *offset) {
+ priv_cb = file_ext->read_cb;
+ rets = 0;
+ goto free;
+ } else if ((!file_ext->read_cb || file_ext->read_cb->information == 0)
+ && *offset > 0) {
+ /*Offset needs to be cleaned for contingous reads*/
+ *offset = 0;
+ rets = 0;
+ goto out;
+ }
+
+ spin_lock(&file_ext->read_io_lock);
+ err = heci_start_read(dev, if_num, file_ext);
+ if (err != 0 && err != -EBUSY) {
+ DBG("heci start read failure with status = %d\n", err);
+ spin_unlock(&file_ext->read_io_lock);
+ rets = err;
+ goto out;
+ }
+ if (HECI_READ_COMPLETE != file_ext->reading_state
+ && !waitqueue_active(&file_ext->rx_wait)) {
+ if (file->f_flags & O_NONBLOCK) {
+ rets = -EAGAIN;
+ spin_unlock(&file_ext->read_io_lock);
+ goto out;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+
+ if (wait_event_interruptible(file_ext->rx_wait,
+ (HECI_READ_COMPLETE == file_ext->reading_state
+ || HECI_FILE_INITIALIZING == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTING == file_ext->state))) {
+ if (signal_pending(current)) {
+ rets = -EINTR;
+ goto out;
+ }
+ return -ERESTARTSYS;
+ }
+
+ if (HECI_FILE_INITIALIZING == file_ext->state ||
+ HECI_FILE_DISCONNECTED == file_ext->state ||
+ HECI_FILE_DISCONNECTING == file_ext->state) {
+ rets = -EBUSY;
+ goto out;
+ }
+ spin_lock(&file_ext->read_io_lock);
+ }
+
+ priv_cb = file_ext->read_cb;
+
+ if (!priv_cb) {
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENODEV;
+ }
+ if (file_ext->reading_state != HECI_READ_COMPLETE) {
+ spin_unlock(&file_ext->read_io_lock);
+ return 0;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+ /* now copy the data to user space */
+copy_buffer:
+ DBG("priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("priv_cb->information - %lu\n",
+ priv_cb->information);
+ if (length == 0 || ubuf == NULL ||
+ *offset > priv_cb->information) {
+ rets = -EMSGSIZE;
+ goto free;
+ }
+
+ /* length is being turncated to PAGE_SIZE, however, */
+ /* information size may be longer */
+ length = (length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset));
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length)) {
+ rets = -EFAULT;
+ goto free;
+ }
+
+ rets = length;
+ *offset += length;
+ if ((unsigned long)*offset < priv_cb->information)
+ goto out;
+
+free:
+ spin_lock_bh(&dev->device_lock);
+ priv_cb_pos = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb_pos != NULL)
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_cb);
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+out: DBG("end heci read rets= %d\n", rets);
+ return rets;
+}
+
+/**
+ * heci_write - the write function.
+ *
+ * @file: pointer to file structure
+ * @ubuf: pointer to user buffer
+ * @length: buffer length
+ * @offset: data offset in buffer
+ *
+ * returns >=0 data length on success , <0 on error
+ */
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int rets = 0;
+ __u8 i;
+ int if_num = iminor(file->f_dentry->d_inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_write_cb = NULL;
+ struct heci_msg_hdr heci_hdr;
+ struct iamt_heci_device *dev;
+ unsigned long currtime = get_seconds();
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb = find_pthi_read_list_entry(dev, file);
+ if ((priv_write_cb != NULL) &&
+ (((currtime - priv_write_cb->read_time) >
+ IAMTHIF_READ_TIMER) ||
+ (file_ext->reading_state == HECI_READ_COMPLETE))) {
+ (*offset) = 0;
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ priv_write_cb = NULL;
+ }
+ }
+
+ /* free entry used in read */
+ if (file_ext->reading_state == HECI_READ_COMPLETE) {
+ *offset = 0;
+ priv_write_cb = find_read_list_entry(dev, file_ext);
+ if (priv_write_cb != NULL) {
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ priv_write_cb = NULL;
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+ }
+ } else if (file_ext->reading_state == HECI_IDLE &&
+ file_ext->read_pending == 0)
+ (*offset) = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ priv_write_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_write_cb)
+ return -ENOMEM;
+
+ priv_write_cb->file_object = file;
+ priv_write_cb->file_private = file_ext;
+ priv_write_cb->request_buffer.data = kmalloc(length, GFP_KERNEL);
+ if (!priv_write_cb->request_buffer.data) {
+ kfree(priv_write_cb);
+ return -ENOMEM;
+ }
+ DBG("length =%d\n", (int) length);
+
+ if (copy_from_user(priv_write_cb->request_buffer.data,
+ ubuf, length)) {
+ rets = -EFAULT;
+ goto fail;
+ }
+
+ spin_lock(&file_ext->file_lock);
+ file_ext->sm_state = 0;
+ if ((length == 4) &&
+ ((memcmp(heci_wd_state_independence_msg[0], ubuf, 4) == 0) ||
+ (memcmp(heci_wd_state_independence_msg[1], ubuf, 4) == 0) ||
+ (memcmp(heci_wd_state_independence_msg[2], ubuf, 4) == 0)))
+ file_ext->sm_state |= HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+
+ INIT_LIST_HEAD(&priv_write_cb->cb_list);
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb->response_buffer.data =
+ kmalloc(IAMTHIF_MTU, GFP_KERNEL);
+ if (!priv_write_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->iamthif_file_ext.me_client_id)
+ break;
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients) ||
+ (dev->me_clients[i].client_id !=
+ dev->iamthif_file_ext.me_client_id)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ } else if ((length > dev->me_clients[i].props.max_msg_length)
+ || (length <= 0)) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -EMSGSIZE;
+ goto fail;
+ }
+
+
+ priv_write_cb->response_buffer.size = IAMTHIF_MTU;
+ priv_write_cb->major_file_operations = HECI_IOCTL;
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+
+ if (!list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)
+ || dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi_state = %d\n", (int) dev->iamthif_state);
+ DBG("add PTHI cb to pthi cmd waiting list\n");
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->pthi_cmd_list.heci_cb.cb_list);
+ rets = length;
+ } else {
+ DBG("call pthi write\n");
+ rets = pthi_write(dev, priv_write_cb);
+
+ if (rets != 0) {
+ DBG("pthi write failed with status = %d\n",
+ rets);
+ spin_unlock_bh(&dev->device_lock);
+ goto fail;
+ }
+ rets = length;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+ }
+
+ priv_write_cb->major_file_operations = HECI_WRITE;
+ /* make sure information is zero before we start */
+
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+
+ spin_lock(&file_ext->write_io_lock);
+ DBG("host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (file_ext->state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ DBG("host client = %d, is not connected to ME client = %d",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ goto unlock;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ file_ext->me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if (i == dev->num_heci_me_clients) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+ if (length > dev->me_clients[i].props.max_msg_length || length <= 0) {
+ rets = -EINVAL;
+ goto unlock;
+ }
+ priv_write_cb->file_private = file_ext;
+
+ spin_lock_bh(&dev->device_lock);
+ if (flow_ctrl_creds(dev, file_ext) &&
+ dev->host_buffer_is_empty) {
+ spin_unlock_bh(&dev->device_lock);
+ dev->host_buffer_is_empty = 0;
+ if (length > ((((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr))) {
+
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) -
+ sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = length;
+ heci_hdr.msg_complete = 1;
+ }
+ heci_hdr.host_addr = file_ext->host_client_id;
+ heci_hdr.me_addr = file_ext->me_client_id;
+ heci_hdr.reserved = 0;
+ DBG("call heci_write_message header=%08x.\n",
+ *((__u32 *) &heci_hdr));
+ spin_unlock(&file_ext->write_io_lock);
+ /* protect heci low level write */
+ spin_lock_bh(&dev->device_lock);
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *) (priv_write_cb->request_buffer.data),
+ heci_hdr.length)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_write_cb);
+ rets = -ENODEV;
+ priv_write_cb->information = 0;
+ return rets;
+ }
+ file_ext->writing_state = HECI_WRITING;
+ priv_write_cb->information = heci_hdr.length;
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, file_ext);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ } else {
+
+ spin_unlock_bh(&dev->device_lock);
+ priv_write_cb->information = 0;
+ file_ext->writing_state = HECI_WRITING;
+ spin_unlock(&file_ext->write_io_lock);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return length;
+
+unlock:
+ spin_unlock(&file_ext->write_io_lock);
+fail:
+ heci_free_cb_private(priv_write_cb);
+ return rets;
+
+}
+
+/**
+ * heci_ioctl - the IOCTL function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ * @cmd: ioctl command
+ * @data: pointer to heci message structure
+ *
+ * returns 0 on success , <0 on error
+ */
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data)
+{
+ int rets = 0;
+ int if_num = iminor(inode);
+ struct heci_file_private *file_ext = file->private_data;
+ /* in user space */
+ struct heci_message_data *u_msg = (struct heci_message_data *) data;
+ struct heci_message_data k_msg; /* all in kernel on the stack */
+ struct iamt_heci_device *dev;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ /* first copy from user all data needed */
+ if (copy_from_user(&k_msg, u_msg, sizeof(k_msg))) {
+ DBG("first copy from user all data needed filled\n");
+ return -EFAULT;
+ }
+ DBG("user message size is %d\n", k_msg.size);
+
+ switch (cmd) {
+ case IOCTL_HECI_GET_VERSION:
+ DBG(": IOCTL_HECI_GET_VERSION\n");
+ rets = heci_ioctl_get_version(dev, if_num, u_msg, k_msg,
+ file_ext);
+ break;
+
+ case IOCTL_HECI_CONNECT_CLIENT:
+ DBG(": IOCTL_HECI_CONNECT_CLIENT.\n");
+ rets = heci_ioctl_connect_client(dev, if_num, u_msg, k_msg,
+ file);
+ break;
+
+ case IOCTL_HECI_WD:
+ DBG(": IOCTL_HECI_WD.\n");
+ rets = heci_ioctl_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ case IOCTL_HECI_BYPASS_WD:
+ DBG(": IOCTL_HECI_BYPASS_WD.\n");
+ rets = heci_ioctl_bypass_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ default:
+ rets = -EINVAL;
+ break;
+ }
+ return rets;
+}
+
+/**
+ * heci_poll - the poll function
+ *
+ * @file: pointer to file structure
+ * @wait: pointer to poll_table structure
+ *
+ * returns poll mask
+ */
+static unsigned int heci_poll(struct file *file, poll_table *wait)
+{
+ int if_num = iminor(file->f_dentry->d_inode);
+ unsigned int mask = 0;
+ struct heci_file_private *file_ext = file->private_data;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return mask;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return mask;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return mask;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ poll_wait(file, &dev->iamthif_file_ext.wait, wait);
+ spin_lock(&dev->iamthif_file_ext.file_lock);
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE
+ && dev->iamthif_file_object == file) {
+ mask |= (POLLIN | POLLRDNORM);
+ spin_lock_bh(&dev->device_lock);
+ DBG("run next pthi cb\n");
+ run_next_iamthif_cmd(dev);
+ spin_unlock_bh(&dev->device_lock);
+ }
+ spin_unlock(&dev->iamthif_file_ext.file_lock);
+
+ } else{
+ poll_wait(file, &file_ext->tx_wait, wait);
+ spin_lock(&file_ext->write_io_lock);
+ if (HECI_WRITE_COMPLETE == file_ext->writing_state)
+ mask |= (POLLIN | POLLRDNORM);
+
+ spin_unlock(&file_ext->write_io_lock);
+ }
+
+ return mask;
+}
+
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct iamt_heci_device *dev = pci_get_drvdata(pdev);
+ int err = 0;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ /* Stop watchdog if exists */
+ del_timer_sync(&dev->wd_timer);
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
+ && dev->wd_timeout) {
+ spin_lock_bh(&dev->device_lock);
+ g_sus_wd_timeout = dev->wd_timeout;
+ dev->wd_timeout = 0;
+ dev->wd_due_counter = 0;
+ memcpy(dev->wd_data, heci_stop_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ dev->stop = 1;
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_wd(dev))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+ } else {
+ dev->wd_pending = 1;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ dev->wd_stoped = 0;
+
+ err = wait_event_interruptible_timeout(dev->wait_stop_wd,
+ (dev->wd_stoped),
+ 10 * HZ);
+ if (!dev->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else {
+ DBG("stop wd complete %d.\n", err);
+ err = 0;
+ }
+ }
+ /* Set new heci state */
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state == HECI_ENABLED ||
+ dev->heci_state == HECI_RECOVERING_FROM_RESET) {
+ dev->heci_state = HECI_POWER_DOWN;
+ heci_reset(dev, 0);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ pci_save_state(pdev);
+
+ pci_disable_device(pdev);
+ free_irq(pdev->irq, dev);
+
+ pci_set_power_state(pdev, PCI_D3hot);
+
+ return err;
+}
+
+static int heci_resume(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *dev;
+ int err = 0;
+
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+
+ dev = pci_get_drvdata(pdev);
+ if (!dev)
+ return -ENODEV;
+
+ /* request and enable interrupt */
+ err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, dev);
+ if (err) {
+ printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
+ pdev->irq);
+ return err;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_POWER_UP;
+ heci_reset(dev, 1);
+ spin_unlock_bh(&dev->device_lock);
+
+ /* Start watchdog if stopped in suspend */
+ if (g_sus_wd_timeout != 0) {
+ dev->wd_timeout = g_sus_wd_timeout;
+
+ memcpy(dev->wd_data, heci_start_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
+ &dev->wd_timeout, sizeof(__u16));
+ dev->wd_due_counter = 1;
+
+ if (dev->wd_timeout)
+ mod_timer(&dev->wd_timer, jiffies);
+
+ g_sus_wd_timeout = 0;
+ }
+ return err;
+}
+#endif
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(HECI_DRIVER_VERSION);
diff --git a/drivers/char/heci/heci_version.h b/drivers/char/heci/heci_version.h
new file mode 100644
index 0000000..797e84e
--- /dev/null
+++ b/drivers/char/heci/heci_version.h
@@ -0,0 +1,54 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef HECI_VERSION_H
+#define HECI_VERSION_H
+
+#define MAJOR_VERSION 5
+#define MINOR_VERSION 0
+#define QUICK_FIX_NUMBER 0
+#define VER_BUILD 30
+
+#define HECI_DRV_VER1 __stringify(MAJOR_VERSION) "." __stringify(MINOR_VERSION)
+#define HECI_DRV_VER2 __stringify(QUICK_FIX_NUMBER) "." __stringify(VER_BUILD)
+
+#define HECI_DRIVER_VERSION HECI_DRV_VER1 "." HECI_DRV_VER2
+
+#endif
diff --git a/drivers/char/heci/interrupt.c b/drivers/char/heci/interrupt.c
new file mode 100644
index 0000000..aacd262
--- /dev/null
+++ b/drivers/char/heci/interrupt.c
@@ -0,0 +1,1553 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/kthread.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+
+/*
+ * interrupt function prototypes
+ */
+static void heci_bh_handler(struct work_struct *work);
+static int heci_bh_read_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static int heci_bh_write_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *connect_res);
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *disconnect_res);
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control);
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req);
+
+
+/**
+ * heci_isr_interrupt - The ISR of the HECI device
+ *
+ * @irq: The irq number
+ * @dev_id: pointer to the device structure
+ *
+ * returns irqreturn_t
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id)
+{
+ int err;
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) dev_id;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+
+ if ((dev->host_hw_state & H_IS) != H_IS)
+ return IRQ_NONE;
+
+ /* disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ /*
+ * Our device interrupted, schedule work the heci_bh_handler
+ * to handle the interrupt processing. This needs to be a
+ * workqueue item since the handler can sleep.
+ */
+ PREPARE_WORK(&dev->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler.\n");
+ err = schedule_work(&dev->work);
+ if (!err) {
+ printk(KERN_ERR "heci: schedule the heci_bh_handler"
+ " failed error=%x\n", err);
+ }
+ return IRQ_HANDLED;
+}
+
+/**
+ * _heci_cmpl - process completed operation.
+ *
+ * @file_ext: private data of the file object.
+ * @priv_cb_pos: callback block.
+ */
+static void _heci_cmpl(struct heci_file_private *file_ext,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (priv_cb_pos->major_file_operations == HECI_WRITE) {
+ heci_free_cb_private(priv_cb_pos);
+ DBG("completing write call back.\n");
+ file_ext->writing_state = HECI_WRITE_COMPLETE;
+ if ((&file_ext->tx_wait) &&
+ waitqueue_active(&file_ext->tx_wait))
+ wake_up_interruptible(&file_ext->tx_wait);
+
+ } else if (priv_cb_pos->major_file_operations == HECI_READ
+ && HECI_READING == file_ext->reading_state) {
+ DBG("completing read call back information= %lu\n",
+ priv_cb_pos->information);
+ file_ext->reading_state = HECI_READ_COMPLETE;
+ if ((&file_ext->rx_wait) &&
+ waitqueue_active(&file_ext->rx_wait))
+ wake_up_interruptible(&file_ext->rx_wait);
+
+ }
+}
+
+/**
+ * _heci_cmpl_iamthif - process completed iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @priv_cb_pos: callback block.
+ */
+static void _heci_cmpl_iamthif(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (dev->iamthif_canceled != 1) {
+ dev->iamthif_state = HECI_IAMTHIF_READ_COMPLETE;
+ dev->iamthif_stall_timer = 0;
+ memcpy(priv_cb_pos->response_buffer.data,
+ dev->iamthif_msg_buf,
+ dev->iamthif_msg_buf_index);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->pthi_read_complete_list.heci_cb.cb_list);
+ DBG("pthi read completed.\n");
+ } else {
+ run_next_iamthif_cmd(dev);
+ }
+ if (&dev->iamthif_file_ext.wait) {
+ DBG("completing pthi call back.\n");
+ wake_up_interruptible(&dev->iamthif_file_ext.wait);
+ }
+}
+/**
+ * heci_bh_handler - function called after ISR to handle the interrupt
+ * processing.
+ *
+ * @work: pointer to the work structure
+ *
+ * NOTE: This function is called by schedule work
+ */
+static void heci_bh_handler(struct work_struct *work)
+{
+ struct iamt_heci_device *dev =
+ container_of(work, struct iamt_heci_device, work);
+ struct io_heci_list complete_list;
+ __s32 slots;
+ int rets;
+ struct heci_cb_private *cb_pos = NULL, *cb_next = NULL;
+ struct heci_file_private *file_ext;
+ int bus_message_received = 0;
+ struct task_struct *tsk;
+
+ DBG("function called after ISR to handle the interrupt processing.\n");
+ /* initialize our complete list */
+ spin_lock_bh(&dev->device_lock);
+ heci_initialize_list(&complete_list, dev);
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ /* check if ME wants a reset */
+ if (((dev->me_hw_state & ME_RDY_HRA) == 0)
+ && (dev->heci_state != HECI_RESETING)
+ && (dev->heci_state != HECI_INITIALIZING)) {
+ DBG("FW not ready.\n");
+ heci_reset(dev, 1);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ /* check if we need to start the dev */
+ if ((dev->host_hw_state & H_RDY) == 0) {
+ if ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA) {
+ DBG("we need to start the dev.\n");
+ dev->host_hw_state |= (H_IE | H_IG | H_RDY);
+ heci_set_csr_register(dev);
+ if (dev->heci_state == HECI_INITIALIZING) {
+ dev->recvd_msg = 1;
+ spin_unlock_bh(&dev->device_lock);
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ return;
+
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ tsk = kthread_run(heci_task_initialize_clients,
+ dev, "heci_reinit");
+ if (IS_ERR(tsk)) {
+ int rc = PTR_ERR(tsk);
+ printk(KERN_WARNING "heci: Unable to"
+ "start the heci thread: %d\n", rc);
+ }
+ return;
+ }
+ } else {
+ DBG("enable interrupt FW not ready.\n");
+ heci_csr_enable_interrupts(dev);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ }
+ /* check slots avalable for reading */
+ slots = count_full_read_slots(dev);
+ DBG("slots =%08x extra_write_index =%08x.\n",
+ slots, dev->extra_write_index);
+ while ((slots > 0) && (!dev->extra_write_index)) {
+ DBG("slots =%08x extra_write_index =%08x.\n", slots,
+ dev->extra_write_index);
+ DBG("call heci_bh_read_handler.\n");
+ rets = heci_bh_read_handler(&complete_list, dev, &slots);
+ if (rets != 0)
+ goto end;
+ }
+ rets = heci_bh_write_handler(&complete_list, dev, &slots);
+end:
+ DBG("end of bottom half function.\n");
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ /* acknowledge interrupt and disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ PREPARE_WORK(&dev->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler.\n");
+ rets = schedule_work(&dev->work);
+ if (!rets) {
+ printk(KERN_ERR "heci: schedule the heci_bh_handler"
+ " failed error=%x\n", rets);
+ }
+ } else {
+ heci_csr_enable_interrupts(dev);
+ }
+
+ if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) {
+ DBG("received waiting bus message\n");
+ bus_message_received = 1;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ if (bus_message_received) {
+ DBG("wake up dev->wait_recvd_msg\n");
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ bus_message_received = 0;
+ }
+ if ((complete_list.status != 0)
+ || list_empty(&complete_list.heci_cb.cb_list))
+ return;
+
+
+ list_for_each_entry_safe(cb_pos, cb_next,
+ &complete_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)cb_pos->file_private;
+ list_del(&cb_pos->cb_list);
+ if (file_ext != NULL) {
+ if (file_ext != &dev->iamthif_file_ext) {
+ DBG("completing call back.\n");
+ _heci_cmpl(file_ext, cb_pos);
+ cb_pos = NULL;
+ } else if (file_ext == &dev->iamthif_file_ext) {
+ _heci_cmpl_iamthif(dev, cb_pos);
+ }
+ }
+ }
+}
+
+
+/**
+ * heci_bh_read_handler - bottom half read routine after ISR to
+ * handle the read processing.
+ *
+ * @cmpl_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @slots: slots to read.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+ struct heci_msg_hdr *heci_hdr;
+ int ret = 0;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (!dev->rd_msg_hdr) {
+ dev->rd_msg_hdr = read_heci_register(dev, ME_CB_RW);
+ DBG("slots=%08x.\n", *slots);
+ (*slots)--;
+ DBG("slots=%08x.\n", *slots);
+ }
+ heci_hdr = (struct heci_msg_hdr *) &dev->rd_msg_hdr;
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+
+ if ((heci_hdr->reserved) || !(dev->rd_msg_hdr)) {
+ DBG("corrupted message header.\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+
+ if ((heci_hdr->host_addr) || (heci_hdr->me_addr)) {
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe read host"
+ " client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ if ((file_pos->host_client_id == heci_hdr->host_addr)
+ && (file_pos->me_client_id == heci_hdr->me_addr))
+ break;
+ }
+
+ if (&file_pos->link == &dev->file_list) {
+ DBG("corrupted message header\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+ }
+ if (((*slots) * sizeof(__u32)) < heci_hdr->length) {
+ DBG("we can't read the message slots=%08x.\n", *slots);
+ /* we can't read the message */
+ ret = -ERANGE;
+ goto end;
+ }
+
+ /* decide where to read the message too */
+ if (!heci_hdr->host_addr) {
+ DBG("call heci_bh_read_bus_message.\n");
+ heci_bh_read_bus_message(dev, heci_hdr);
+ DBG("end heci_bh_read_bus_message.\n");
+ } else if ((heci_hdr->host_addr == dev->iamthif_file_ext.host_client_id)
+ && (HECI_FILE_CONNECTED == dev->iamthif_file_ext.state)
+ && (dev->iamthif_state == HECI_IAMTHIF_READING)) {
+ DBG("call heci_bh_read_iamthif_message.\n");
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ ret = heci_bh_read_pthi_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ } else {
+ DBG("call heci_bh_read_client_message.\n");
+ ret = heci_bh_read_client_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ }
+
+ /* reset the number of slots and header */
+ *slots = count_full_read_slots(dev);
+ dev->rd_msg_hdr = 0;
+
+ if (*slots == -ESLOTS_OVERFLOW) {
+ /* overflow - reset */
+ DBG("reseting due to slots overflow.\n");
+ /* set the event since message has been read */
+ ret = -ERANGE;
+ goto end;
+ }
+end:
+ return ret;
+}
+
+
+/**
+ * heci_bh_read_bus_message - bottom half read routine after ISR to
+ * handle the read bus message cmd processing.
+ *
+ * @dev: Device object for our driver
+ * @heci_hdr: header of bus message
+ */
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_bus_message *heci_msg;
+ struct hbm_host_version_response *version_res;
+ struct hbm_client_connect_response *connect_res;
+ struct hbm_client_connect_response *disconnect_res;
+ struct hbm_flow_control *flow_control;
+ struct hbm_props_response *props_res;
+ struct hbm_host_enum_response *enum_res;
+ struct hbm_client_disconnect_request *disconnect_req;
+ struct hbm_host_stop_request *h_stop_req;
+ int i;
+ unsigned char *buffer;
+
+ /* read the message to our buffer */
+ buffer = (unsigned char *) dev->rd_msg_buf;
+ BUG_ON(heci_hdr->length >= sizeof(dev->rd_msg_buf));
+ heci_read_slots(dev, buffer, heci_hdr->length);
+ heci_msg = (struct heci_bus_message *) buffer;
+
+ switch (*(__u8 *) heci_msg) {
+ case HOST_START_RES_CMD:
+ version_res = (struct hbm_host_version_response *) heci_msg;
+ if (version_res->host_version_supported) {
+ dev->version.major_version = HBM_MAJOR_VERSION;
+ dev->version.minor_version = HBM_MINOR_VERSION;
+ } else {
+ dev->version = version_res->me_max_version;
+ }
+ dev->recvd_msg = 1;
+ DBG("host start response message received.\n");
+ break;
+
+ case CLIENT_CONNECT_RES_CMD:
+ connect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_connect_response(dev, connect_res);
+ DBG("client connect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case CLIENT_DISCONNECT_RES_CMD:
+ disconnect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_disconnect_response(dev, disconnect_res);
+ DBG("client disconnect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case HECI_FLOW_CONTROL_CMD:
+ flow_control = (struct hbm_flow_control *) heci_msg;
+ heci_client_flow_control_response(dev, flow_control);
+ DBG("client flow control response message received.\n");
+ break;
+
+ case HOST_CLIENT_PROPERTEIS_RES_CMD:
+ props_res = (struct hbm_props_response *) heci_msg;
+ if (props_res->status != 0) {
+ BUG();
+ break;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ props_res->address) {
+ dev->me_clients[i].props =
+ props_res->client_properties;
+ break;
+ }
+
+ }
+ dev->recvd_msg = 1;
+ break;
+
+ case HOST_ENUM_RES_CMD:
+ enum_res = (struct hbm_host_enum_response *) heci_msg;
+ memcpy(dev->heci_me_clients, enum_res->valid_addresses, 32);
+ dev->recvd_msg = 1;
+ break;
+
+ case HOST_STOP_RES_CMD:
+ dev->heci_state = HECI_DISABLED;
+ DBG("reseting because of FW stop response.\n");
+ heci_reset(dev, 1);
+ break;
+
+ case CLIENT_DISCONNECT_REQ_CMD:
+ /* search for client */
+ disconnect_req =
+ (struct hbm_client_disconnect_request *) heci_msg;
+ heci_client_disconnect_request(dev, disconnect_req);
+ break;
+
+ case ME_STOP_REQ_CMD:
+ /* prepare stop request */
+ heci_hdr = (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ h_stop_req =
+ (struct hbm_host_stop_request *) &dev->ext_msg_buf[1];
+ memset(h_stop_req, 0, sizeof(struct hbm_host_stop_request));
+ h_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ h_stop_req->reason = DRIVER_STOP_REQUEST;
+ h_stop_req->reserved[0] = 0;
+ h_stop_req->reserved[1] = 0;
+ dev->extra_write_index = 2;
+ break;
+
+ default:
+ BUG();
+ break;
+
+ }
+}
+
+/**
+ * heci_bh_read_pthi_message - bottom half read routine after ISR to
+ * handle the read pthi message data processing.
+ *
+ * @complete_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @heci_hdr: header of pthi message
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb;
+ unsigned char *buffer;
+
+ BUG_ON(heci_hdr->me_addr != dev->iamthif_file_ext.me_client_id);
+ BUG_ON(dev->iamthif_state != HECI_IAMTHIF_READING);
+
+ buffer = (unsigned char *) (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index);
+ BUG_ON(sizeof(dev->iamthif_msg_buf) <
+ (dev->iamthif_msg_buf_index + heci_hdr->length));
+
+ heci_read_slots(dev, buffer, heci_hdr->length);
+
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+
+ if (!(heci_hdr->msg_complete))
+ return 0;
+
+ DBG("pthi_message_buffer_index=%d\n", heci_hdr->length);
+ DBG("completed pthi read.\n ");
+ if (!dev->iamthif_current_cb)
+ return -ENODEV;
+
+ priv_cb = dev->iamthif_current_cb;
+ dev->iamthif_current_cb = NULL;
+
+ file_ext = (struct heci_file_private *)priv_cb->file_private;
+ if (!file_ext)
+ return -ENODEV;
+
+ dev->iamthif_stall_timer = 0;
+ priv_cb->information = dev->iamthif_msg_buf_index;
+ priv_cb->read_time = get_seconds();
+ if ((dev->iamthif_ioctl) && (file_ext == &dev->iamthif_file_ext)) {
+ /* found the iamthif cb */
+ DBG("complete the pthi read cb.\n ");
+ if (&dev->iamthif_file_ext) {
+ DBG("add the pthi read cb to complete.\n ");
+ list_add_tail(&priv_cb->cb_list,
+ &complete_list->heci_cb.cb_list);
+ }
+ }
+ return 0;
+}
+
+/**
+ * _heci_bh_state_ok - check if heci header matches file private data
+ *
+ * @file_ext: private data of the file object
+ * @heci_hdr: header of heci client message
+ *
+ * returns !=0 if matches, 0 if no match.
+ */
+static int _heci_bh_state_ok(struct heci_file_private *file_ext,
+ struct heci_msg_hdr *heci_hdr)
+{
+ return ((file_ext->host_client_id == heci_hdr->host_addr)
+ && (file_ext->me_client_id == heci_hdr->me_addr)
+ && (file_ext->state == HECI_FILE_CONNECTED)
+ && (HECI_READ_COMPLETE != file_ext->reading_state));
+}
+
+/**
+ * heci_bh_read_client_message - bottom half read routine after ISR to
+ * handle the read heci client message data processing.
+ *
+ * @complete_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @heci_hdr: header of heci client message
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ unsigned char *buffer = NULL;
+
+ DBG("start client msg\n");
+ if (!((dev->read_list.status == 0) &&
+ !list_empty(&dev->read_list.heci_cb.cb_list)))
+ goto quit;
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if ((file_ext != NULL) &&
+ (_heci_bh_state_ok(file_ext, heci_hdr))) {
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_READING;
+ buffer = (unsigned char *)
+ (priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information);
+ BUG_ON(priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information);
+
+ if (priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information) {
+ DBG("message overflow.\n");
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENOMEM;
+ }
+ if (buffer) {
+ heci_read_slots(dev, buffer,
+ heci_hdr->length);
+ }
+ priv_cb_pos->information += heci_hdr->length;
+ if (heci_hdr->msg_complete) {
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ DBG("completed read host client = %d,"
+ "ME client = %d, "
+ "data length = %lu\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id,
+ priv_cb_pos->information);
+
+ *(priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information) = '\0';
+ DBG("priv_cb_pos->res_buffer - %s\n",
+ priv_cb_pos->response_buffer.data);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &complete_list->heci_cb.cb_list);
+ } else {
+ spin_unlock(&file_ext->read_io_lock);
+ }
+
+ break;
+ }
+
+ }
+
+quit:
+ DBG("message read\n");
+ if (!buffer) {
+ heci_read_slots(dev, (unsigned char *) dev->rd_msg_buf,
+ heci_hdr->length);
+ DBG("discarding message, header=%08x.\n",
+ *(__u32 *) dev->rd_msg_buf);
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_iamthif_read - prepare to read iamthif data.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_iamthif_read(struct iamt_heci_device *dev, __s32 *slots)
+{
+
+ if (((*slots) * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr)
+ + sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, &dev->iamthif_file_ext)) {
+ DBG("iamthif flow control failed\n");
+ } else {
+ DBG("iamthif flow control success\n");
+ dev->iamthif_state = HECI_IAMTHIF_READING;
+ dev->iamthif_flow_control_pending = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_stall_timer = IAMTHIF_STALL_TIMER;
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+ }
+ return 0;
+ } else {
+ return -ECOMPLETE_MESSAGE;
+ }
+}
+
+/**
+ * _heci_bh_close - process close related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_close(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request) + 3) / 4;
+
+ if (!heci_disconnect(dev, file_ext)) {
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_hb_close - process read related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_read(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+
+/**
+ * _heci_bh_ioctl - process ioctl related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_ioctl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request))) {
+ file_ext->state = HECI_FILE_CONNECTING;
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request) + 3) / 4;
+ if (!heci_connect(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl - process completed and no-iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ (priv_cb_pos->request_buffer.size -
+ priv_cb_pos->information))) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = ((priv_cb_pos->request_buffer.size) -
+ (priv_cb_pos->information));
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ "heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n",
+ heci_hdr->length);
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ file_ext->status = 0;
+ priv_cb_pos->information += heci_hdr->length;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ (*slots) -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ priv_cb_pos->information += heci_hdr->length;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ " heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl_iamthif - process completed iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl_iamthif(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ dev->iamthif_msg_buf_size -
+ dev->iamthif_msg_buf_index)) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = dev->iamthif_msg_buf_size -
+ dev->iamthif_msg_buf_index;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index),
+ heci_hdr->length)) {
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+ priv_cb_pos->information = dev->iamthif_msg_buf_index;
+ file_ext->status = 0;
+ dev->iamthif_state = HECI_IAMTHIF_FLOW_CONTROL;
+ dev->iamthif_flow_control_pending = 1;
+ /* save iamthif cb sent to pthi client */
+ dev->iamthif_current_cb = priv_cb_pos;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ } else {
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * heci_bh_write_handler - bottom half write routine after
+ * ISR to handle the write processing.
+ *
+ * @cmpl_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @slots: slots to write.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_write_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ struct io_heci_list *list;
+ int ret;
+
+ if (!host_buffer_is_empty(dev)) {
+ DBG("host buffer is not empty.\n");
+ return 0;
+ }
+ dev->write_hang = -1;
+ *slots = count_empty_write_slots(dev);
+ /* complete all waiting for write CB */
+ DBG("complete all waiting for write cb.\n");
+
+ list = &dev->write_waiting_list;
+ if ((list->status == 0)
+ && !list_empty(&list->heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &list->heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext != NULL) {
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ if ((HECI_WRITING == file_ext->writing_state) &&
+ (priv_cb_pos->major_file_operations ==
+ HECI_WRITING) &&
+ (file_ext != &dev->iamthif_file_ext)) {
+ DBG("HECI WRITE COMPLETE\n");
+ file_ext->writing_state =
+ HECI_WRITE_COMPLETE;
+ list_add_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ }
+ if (file_ext == &dev->iamthif_file_ext) {
+ DBG("check iamthif flow control.\n");
+ if (dev->iamthif_flow_control_pending) {
+ ret = _heci_bh_iamthif_read(dev,
+ slots);
+ if (ret != 0)
+ return ret;
+ }
+ }
+ }
+
+ }
+ }
+
+ if ((dev->stop) && (!dev->wd_pending)) {
+ dev->wd_stoped = 1;
+ wake_up_interruptible(&dev->wait_stop_wd);
+ return 0;
+ }
+
+ if (dev->extra_write_index != 0) {
+ DBG("extra_write_index =%d.\n", dev->extra_write_index);
+ heci_write_message(dev,
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0],
+ (unsigned char *) &dev->ext_msg_buf[1],
+ (dev->extra_write_index - 1) * sizeof(__u32));
+ *slots -= dev->extra_write_index;
+ dev->extra_write_index = 0;
+ }
+ if (dev->heci_state == HECI_ENABLED) {
+ if ((dev->wd_pending)
+ && flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ if (!heci_send_wd(dev))
+ DBG("wd send failed.\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+
+ if (dev->wd_timeout != 0) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_START_WD_DATA_SIZE + 3) / 4;
+ dev->wd_due_counter = 2;
+ } else {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_WD_PARAMS_SIZE + 3) / 4;
+ dev->wd_due_counter = 0;
+ }
+
+ }
+ }
+ if (dev->stop)
+ return ~ENODEV;
+
+ /* complete control write list CB */
+ if (dev->ctrl_wr_list.status == 0) {
+ /* complete control write list CB */
+ DBG("complete control write list cb.\n");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_wr_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ }
+ switch (priv_cb_pos->major_file_operations) {
+ case HECI_CLOSE:
+ /* send disconnect message */
+ ret = _heci_bh_close(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_READ:
+ /* send flow control message */
+ ret = _heci_bh_read(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_IOCTL:
+ /* connect message */
+ if (!other_client_is_connecting(dev, file_ext))
+ continue;
+ ret = _heci_bh_ioctl(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+
+ default:
+ BUG();
+ }
+
+ }
+ }
+ /* complete write list CB */
+ if ((dev->write_list.status == 0)
+ && !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ DBG("complete write list cb.\n");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (file_ext != NULL) {
+ if (file_ext != &dev->iamthif_file_ext) {
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control"
+ " credentials for client"
+ " %d, not sending.\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl(dev, slots,
+ priv_cb_pos,
+ file_ext,
+ cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ } else if (file_ext == &dev->iamthif_file_ext) {
+ /* IAMTHIF IOCTL */
+ DBG("complete pthi write cb.\n");
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control"
+ " credentials for pthi"
+ " client %d.\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl_iamthif(dev, slots,
+ priv_cb_pos,
+ file_ext,
+ cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ }
+ }
+
+ }
+ }
+ return 0;
+}
+
+
+/**
+ * is_treat_specially_client - check if the message belong
+ * to the file private data.
+ *
+ * @file_ext: private data of the file object
+ * @rs: connect response bus message
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int is_treat_specially_client(struct heci_file_private *file_ext,
+ struct hbm_client_connect_response *rs)
+{
+ int ret = 0;
+
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+ if (rs->status == 0) {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_CONNECTED;
+ file_ext->status = 0;
+ } else {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_DISCONNECTED;
+ file_ext->status = -ENODEV;
+ }
+ ret = 1;
+ }
+ DBG("client state = %d.\n", file_ext->state);
+ return ret;
+}
+
+/**
+ * heci_client_connect_response - connect response bh routine
+ *
+ * @dev: Device object for our driver
+ * @rs: connect response bus message
+ */
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ /* if WD or iamthif client treat specially */
+
+ if ((is_treat_specially_client(&(dev->wd_file_ext), rs)) ||
+ (is_treat_specially_client(&(dev->iamthif_file_ext), rs)))
+ return;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+ if (HECI_IOCTL == priv_cb_pos->major_file_operations) {
+ if (is_treat_specially_client(file_ext, rs)) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+ }
+}
+
+/**
+ * heci_client_disconnect_response - disconnect response bh routine
+ *
+ * @dev: Device object for our driver
+ * @rs: disconnect response bus message
+ */
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+
+ DBG("list_for_each_entry_safe in ctrl_rd_list.\n");
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+
+ list_del(&priv_cb_pos->cb_list);
+ if (rs->status == 0) {
+ file_ext->state =
+ HECI_FILE_DISCONNECTED;
+ }
+
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_flow_addr - tell they have same address.
+ *
+ * @file: private data of the file object.
+ * @flow: flow control.
+ *
+ * returns !=0, same; 0,not.
+ */
+static int same_flow_addr(struct heci_file_private *file,
+ struct hbm_flow_control *flow)
+{
+ return ((file->host_client_id == flow->host_addr)
+ && (file->me_client_id == flow->me_addr));
+}
+
+/**
+ * add_single_flow_creds - add single buffer credentials.
+ *
+ * @file: private data ot the file object.
+ * @flow: flow control.
+ */
+static void add_single_flow_creds(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow)
+{
+ struct heci_me_client *client;
+ int i;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ client = &dev->me_clients[i];
+ if ((client != NULL) &&
+ (flow->me_addr == client->client_id)) {
+ if (client->props.single_recv_buf != 0) {
+ client->flow_ctrl_creds++;
+ DBG("recv flow ctrl msg ME %d (single).\n",
+ flow->me_addr);
+ DBG("flow control credentials=%d.\n",
+ client->flow_ctrl_creds);
+ } else {
+ BUG(); /* error in flow control */
+ }
+ }
+ }
+}
+
+/**
+ * heci_client_flow_control_response - flow control response bh routine
+ *
+ * @dev: Device object for our driver
+ * @flow_control: flow control response bus message
+ */
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (flow_control->host_addr == 0) {
+ /* single receive buffer */
+ add_single_flow_creds(dev, flow_control);
+ } else {
+ /* normal connection */
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe in file_list\n");
+
+ DBG("file_ext of host client %d ME client %d.\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ DBG("flow ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ if (same_flow_addr(file_pos, flow_control)) {
+ DBG("recv ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ file_pos->flow_ctrl_creds++;
+ DBG("flow control credentials=%d.\n",
+ file_pos->flow_ctrl_creds);
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_disconn_addr - tell they have same address
+ *
+ * @file: private data of the file object.
+ * @disconn: disconnection request.
+ *
+ * returns !=0, same; 0,not.
+ */
+static int same_disconn_addr(struct heci_file_private *file,
+ struct hbm_client_disconnect_request *disconn)
+{
+ return ((file->host_client_id == disconn->host_addr)
+ && (file->me_client_id == disconn->me_addr));
+}
+
+/**
+ * heci_client_disconnect_request - disconnect request bh routine
+ *
+ * @dev: Device object for our driver.
+ * @disconnect_req: disconnect request bus message.
+ */
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_response *disconnect_res;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (same_disconn_addr(file_pos, disconnect_req)) {
+ DBG("disconnect request host client %d ME client %d.\n",
+ disconnect_req->host_addr,
+ disconnect_req->me_addr);
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->timer_count = 0;
+ if (file_pos == &dev->wd_file_ext) {
+ dev->wd_due_counter = 0;
+ dev->wd_pending = 0;
+ } else if (file_pos == &dev->iamthif_file_ext)
+ dev->iamthif_timer = 0;
+
+ /* prepare disconnect response */
+ heci_hdr =
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length =
+ sizeof(struct hbm_client_connect_response);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ disconnect_res =
+ (struct hbm_client_connect_response *)
+ &dev->ext_msg_buf[1];
+ disconnect_res->host_addr = file_pos->host_client_id;
+ disconnect_res->me_addr = file_pos->me_client_id;
+ *(__u8 *) (&disconnect_res->cmd) =
+ CLIENT_DISCONNECT_RES_CMD;
+ disconnect_res->status = 0;
+ dev->extra_write_index = 2;
+ break;
+ }
+ }
+}
+
+/**
+ * heci_timer - timer function.
+ *
+ * @data: pointer to the device structure
+ *
+ * NOTE: This function is called by timer interrupt work
+ */
+void heci_wd_timer(unsigned long data)
+{
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ DBG("send watchdog.\n");
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ /* Watchdog */
+ if ((dev->wd_due_counter != 0) && (dev->wd_bypass == 0)) {
+ if (--dev->wd_due_counter == 0) {
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_wd(dev)) {
+ DBG("wd send failed.\n");
+ } else {
+ flow_ctrl_reduce(dev,
+ &dev->wd_file_ext);
+ }
+
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 2;
+ else
+ dev->wd_due_counter = 0;
+
+ } else
+ dev->wd_pending = 1;
+
+ }
+ }
+ if (dev->iamthif_stall_timer != 0) {
+ if (--dev->iamthif_stall_timer == 0) {
+ DBG("reseting because of hang to PTHI.\n");
+ heci_reset(dev, 1);
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->iamthif_current_cb)
+ heci_free_cb_private(dev->iamthif_current_cb);
+
+ spin_lock_bh(&dev->device_lock);
+ dev->iamthif_file_object = NULL;
+ dev->iamthif_current_cb = NULL;
+ run_next_iamthif_cmd(dev);
+ }
+ }
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+}
diff --git a/drivers/char/heci/io_heci.c b/drivers/char/heci/io_heci.c
new file mode 100644
index 0000000..d7e0648
--- /dev/null
+++ b/drivers/char/heci/io_heci.c
@@ -0,0 +1,847 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/list.h>
+#include <linux/unistd.h>
+#include <linux/delay.h>
+
+#include "heci_data_structures.h"
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+/**
+ * heci_ioctl_get_version - the get driver version IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @*u_msg: pointer to user data struct in user space
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ struct heci_driver_version *version;
+ struct heci_message_data res_msg;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev)
+ || (!file_ext))
+ return -ENODEV;
+
+ if (k_msg.size < (sizeof(struct heci_driver_version) - 2)) {
+ DBG("user buffer less than heci_driver_version.\n");
+ return -EMSGSIZE;
+ }
+
+ res_msg.data = kmalloc(sizeof(struct heci_driver_version), GFP_KERNEL);
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_driver_version));
+ return -ENOMEM;
+ }
+
+ version = (struct heci_driver_version *) res_msg.data;
+ version->major = MAJOR_VERSION;
+ version->minor = MINOR_VERSION;
+ version->hotfix = QUICK_FIX_NUMBER;
+ version->build = VER_BUILD;
+ res_msg.size = sizeof(struct heci_driver_version);
+ if (k_msg.size < sizeof(struct heci_driver_version))
+ res_msg.size -= 2;
+
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+end:
+ kfree(res_msg.data);
+ return rets;
+}
+
+/**
+ * heci_ioctl_connect_client - the connect to fw client IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @*u_msg: pointer to user data struct in user space
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file)
+{
+ int rets = 0;
+ struct heci_message_data req_msg, res_msg;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_client *client;
+ struct heci_file_private *file_ext;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ long timeout = 15; /*15 second */
+ __u8 i;
+ int err = 0;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file))
+ return -ENODEV;
+
+ file_ext = file->private_data;
+ if (!file_ext)
+ return -ENODEV;
+
+ if (k_msg.size != sizeof(struct guid)) {
+ DBG("user buffer size is not equal to size of struct "
+ "guid(16).\n");
+ return -EMSGSIZE;
+ }
+
+ if (!k_msg.data)
+ return -EIO;
+
+ req_msg.data = kmalloc(sizeof(struct guid), GFP_KERNEL);
+ res_msg.data = kmalloc(sizeof(struct heci_client), GFP_KERNEL);
+
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_client));
+ kfree(req_msg.data);
+ return -ENOMEM;
+ }
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ (int) sizeof(struct guid));
+ kfree(res_msg.data);
+ return -ENOMEM;
+ }
+ req_msg.size = sizeof(struct guid);
+ res_msg.size = sizeof(struct heci_client);
+
+ /* copy the message to kernel space -
+ * use a pointer already copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, k_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ /* buffered ioctl cb */
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb) {
+ rets = -ENOMEM;
+ goto end;
+ }
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->response_buffer.data = res_msg.data;
+ priv_cb->response_buffer.size = res_msg.size;
+ priv_cb->request_buffer.data = req_msg.data;
+ priv_cb->request_buffer.size = req_msg.size;
+ priv_cb->major_file_operations = HECI_IOCTL;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if ((file_ext->state != HECI_FILE_INITIALIZING) &&
+ (file_ext->state != HECI_FILE_DISCONNECTED)) {
+ rets = -EBUSY;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ /* find ME client we're trying to connect to */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp((struct guid *)req_msg.data,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (dev->me_clients[i].props.fixed_address == 0) {
+ file_ext->me_client_id =
+ dev->me_clients[i].client_id;
+ file_ext->state = HECI_FILE_CONNECTING;
+ }
+ break;
+ }
+ }
+ /* if we're connecting to PTHI client so we will use the exist
+ * connection
+ */
+ if (memcmp((struct guid *)req_msg.data, &heci_pthi_guid,
+ sizeof(struct guid)) == 0) {
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ if (heci_fe_same_id(file_ext, file_pos)) {
+ DBG("remove file private data node host"
+ " client = %d, ME client = %d.\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del(&file_pos->link);
+ }
+
+ }
+ DBG("free file private data memory.\n");
+ kfree(file_ext);
+ file_ext = NULL;
+ file->private_data = &dev->iamthif_file_ext;
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length =
+ dev->me_clients[i].props.max_msg_length;
+ client->protocol_version =
+ dev->me_clients[i].props.protocol_version;
+ rets = dev->iamthif_file_ext.status;
+ spin_unlock_bh(&dev->device_lock);
+
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ }
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state != HECI_FILE_CONNECTING) {
+ rets = -ENODEV;
+ spin_unlock(&file_ext->file_lock);
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ spin_unlock(&file_ext->file_lock);
+ /* prepare the output buffer */
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length = dev->me_clients[i].props.max_msg_length;
+ client->protocol_version = dev->me_clients[i].props.protocol_version;
+ if (dev->host_buffer_is_empty
+ && !other_client_is_connecting(dev, file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_connect(dev, file_ext)) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ } else {
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ priv_cb->file_private = file_ext;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.
+ cb_list);
+ }
+
+
+ } else {
+ priv_cb->file_private = file_ext;
+ DBG("add connect cb to control write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+
+ if (HECI_FILE_CONNECTED == file_ext->state) {
+ DBG("successfully connected to FW client.\n");
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ } else {
+ DBG("failed to connect to FW client.file_ext->state = %d.\n",
+ file_ext->state);
+ if (!err) {
+ DBG("wait_event_interruptible_timeout failed on client"
+ " connect message fw response message.\n");
+ }
+ rets = -EFAULT;
+ goto remove_list;
+ }
+
+remove_list:
+ if (priv_cb) {
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_list(&dev->ctrl_rd_list, file_ext);
+ heci_flush_list(&dev->ctrl_wr_list, file_ext);
+ spin_unlock_bh(&dev->device_lock);
+ }
+end:
+ DBG("free connect cb memory.");
+ kfree(req_msg.data);
+ kfree(res_msg.data);
+ kfree(priv_cb);
+ return rets;
+}
+
+/**
+ * heci_ioctl_wd - the wd IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ struct heci_message_data req_msg; /*in kernel on the stack */
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size != HECI_WATCHDOG_DATA_SIZE) {
+ DBG("user buffer has invalid size.\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+
+ req_msg.data = kmalloc(HECI_WATCHDOG_DATA_SIZE, GFP_KERNEL);
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ HECI_WATCHDOG_DATA_SIZE);
+ return -ENOMEM;
+ }
+ req_msg.size = HECI_WATCHDOG_DATA_SIZE;
+
+ /* copy the message to kernel space - use a pointer already
+ * copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, req_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if (!dev->asf_mode) {
+ rets = -EIO;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ memcpy(&dev->wd_data[HECI_WD_PARAMS_SIZE], req_msg.data,
+ HECI_WATCHDOG_DATA_SIZE);
+
+ dev->wd_timeout = (req_msg.data[1] << 8) + req_msg.data[0];
+ dev->wd_pending = 0;
+ dev->wd_due_counter = 1; /* next timer */
+ if (dev->wd_timeout == 0) {
+ memcpy(dev->wd_data, heci_stop_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ } else {
+ memcpy(dev->wd_data, heci_start_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ mod_timer(&dev->wd_timer, jiffies);
+ }
+ spin_unlock_bh(&dev->device_lock);
+end:
+ kfree(req_msg.data);
+ return rets;
+}
+
+
+/**
+ * heci_ioctl_bypass_wd - the bypass_wd IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_bypass_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ __u8 flag = 0;
+ int rets = 0;
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size < 1) {
+ DBG("user buffer less than HECI_WATCHDOG_DATA_SIZE.\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+ if (copy_from_user(&flag, k_msg.data, 1)) {
+ rets = -EFAULT;
+ goto end;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ flag = flag ? (1) : (0);
+ dev->wd_bypass = flag;
+ spin_unlock_bh(&dev->device_lock);
+end:
+ return rets;
+}
+
+/**
+ * find_pthi_read_list_entry - finds a PTHIlist entry for current file
+ *
+ * @dev: Device object for our driver
+ * @file: pointer to file object
+ *
+ * returns returned a list entry on success, NULL on failure.
+ */
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct file *file)
+{
+ struct heci_file_private *file_ext_temp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if ((dev->pthi_read_complete_list.status == 0) &&
+ !list_empty(&dev->pthi_read_complete_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_read_complete_list.heci_cb.cb_list, cb_list) {
+ file_ext_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if ((file_ext_temp != NULL) &&
+ (file_ext_temp == &dev->iamthif_file_ext) &&
+ (priv_cb_pos->file_object == file))
+ return priv_cb_pos;
+ }
+ }
+ return NULL;
+}
+
+/**
+ * pthi_read - read data from pthi client
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @file: pointer to file object
+ * @*ubuf: pointer to user data in user space
+ * @length: data length to read
+ * @offset: data read offset
+ *
+ * returns
+ * returned data length on success,
+ * zero if no data to read,
+ * negative on failure.
+ */
+int pthi_read(struct iamt_heci_device *dev, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset)
+{
+ int rets = 0;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_file_private *file_ext = file->private_data;
+ __u8 i;
+ unsigned long currtime = get_seconds();
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ if ((file_ext == NULL) || (file_ext != &dev->iamthif_file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->iamthif_file_ext.me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients)
+ || (dev->me_clients[i].client_id !=
+ dev->iamthif_file_ext.me_client_id)) {
+ DBG("PTHI client not found.\n");
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ priv_cb = find_pthi_read_list_entry(dev, file);
+ if (!priv_cb) {
+ spin_unlock_bh(&dev->device_lock);
+ return 0; /* No more data to read */
+ } else {
+ if (priv_cb &&
+ (currtime - priv_cb->read_time > IAMTHIF_READ_TIMER)) {
+ /* 15 sec for the message has expired */
+ list_del(&priv_cb->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ETIMEDOUT;
+ goto free;
+ }
+ /* if the whole message will fit remove it from the list */
+ if ((priv_cb->information >= *offset) &&
+ (length >= (priv_cb->information - *offset)))
+ list_del(&priv_cb->cb_list);
+ else if ((priv_cb->information > 0) &&
+ (priv_cb->information <= *offset)) {
+ /* end of the message has been reached */
+ list_del(&priv_cb->cb_list);
+ rets = 0;
+ spin_unlock_bh(&dev->device_lock);
+ goto free;
+ }
+ /* else means that not full buffer will be read and do not
+ * remove message from deletion list
+ */
+ }
+ DBG("pthi priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("pthi priv_cb->information - %lu\n",
+ priv_cb->information);
+ spin_unlock_bh(&dev->device_lock);
+
+ /* length is being turncated to PAGE_SIZE, however,
+ * the information may be longer */
+ length = length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset);
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length))
+ rets = -EFAULT;
+ else {
+ rets = length;
+ if ((*offset + length) < priv_cb->information) {
+ *offset += length;
+ goto out;
+ }
+ }
+free:
+ DBG("free pthi cb memory.\n");
+ *offset = 0;
+ heci_free_cb_private(priv_cb);
+out:
+ return rets;
+}
+
+/**
+ * heci_start_read - the start read client message function.
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_start_read(struct iamt_heci_device *dev, int if_num,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ __u8 i;
+ struct heci_cb_private *priv_cb = NULL;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext)) {
+ DBG("received wrong function input param.\n");
+ return -ENODEV;
+ }
+ if (file_ext->state != HECI_FILE_CONNECTED)
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ DBG("check if read is pending.\n");
+ if ((file_ext->read_pending) || (file_ext->read_cb != NULL)) {
+ DBG("read is pending.\n");
+ return -EBUSY;
+ }
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ DBG("allocation call back success\n"
+ "host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id)
+ break;
+
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if (i == dev->num_heci_me_clients) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+
+ priv_cb->response_buffer.size = dev->me_clients[i].props.max_msg_length;
+ spin_unlock_bh(&dev->device_lock);
+ priv_cb->response_buffer.data =
+ kmalloc(priv_cb->response_buffer.size, GFP_KERNEL);
+ if (!priv_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ DBG("allocation call back data success.\n");
+ priv_cb->major_file_operations = HECI_READ;
+ /* make sure information is zero before we start */
+ priv_cb->information = 0;
+ priv_cb->file_private = (void *) file_ext;
+ file_ext->read_cb = priv_cb;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ rets = -ENODEV;
+ goto unlock;
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+unlock:
+ spin_unlock_bh(&dev->device_lock);
+fail:
+ heci_free_cb_private(priv_cb);
+ return rets;
+}
+
+/**
+ * pthi_write - write iamthif data to pthi client
+ *
+ * @dev: Device object for our driver
+ * @priv_cb: heci call back struct
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int pthi_write(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb)
+{
+ int rets = 0;
+ struct heci_msg_hdr heci_hdr;
+
+ if ((!dev) || (!priv_cb))
+ return -ENODEV;
+
+ DBG("write data to pthi client.\n");
+
+ dev->iamthif_state = HECI_IAMTHIF_WRITING;
+ dev->iamthif_current_cb = priv_cb;
+ dev->iamthif_file_object = priv_cb->file_object;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_msg_buf_size = priv_cb->request_buffer.size;
+ memcpy(dev->iamthif_msg_buf, priv_cb->request_buffer.data,
+ priv_cb->request_buffer.size);
+
+ if (flow_ctrl_creds(dev, &dev->iamthif_file_ext) &&
+ dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (priv_cb->request_buffer.size >
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr)) {
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = priv_cb->request_buffer.size;
+ heci_hdr.msg_complete = 1;
+ }
+
+ heci_hdr.host_addr = dev->iamthif_file_ext.host_client_id;
+ heci_hdr.me_addr = dev->iamthif_file_ext.me_client_id;
+ heci_hdr.reserved = 0;
+ dev->iamthif_msg_buf_index += heci_hdr.length;
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *)(dev->iamthif_msg_buf),
+ heci_hdr.length))
+ return -ENODEV;
+
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, &dev->iamthif_file_ext);
+ dev->iamthif_flow_control_pending = 1;
+ dev->iamthif_state = HECI_IAMTHIF_FLOW_CONTROL;
+ DBG("add pthi cb to write waiting list\n");
+ dev->iamthif_current_cb = priv_cb;
+ dev->iamthif_file_object = priv_cb->file_object;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ DBG("message does not complete, "
+ "so add pthi cb to write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ } else {
+ if (!(dev->host_buffer_is_empty))
+ DBG("host buffer is not empty");
+
+ DBG("No flow control credentials, "
+ "so add iamthif cb to write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return rets;
+}
+
+/**
+ * iamthif_ioctl_send_msg - send cmd data to pthi client
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+void run_next_iamthif_cmd(struct iamt_heci_device *dev)
+{
+ struct heci_file_private *file_ext_tmp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int status = 0;
+
+ if (!dev)
+ return;
+
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+ dev->iamthif_file_object = NULL;
+
+ if (dev->pthi_cmd_list.status == 0 &&
+ !list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)) {
+ DBG("complete pthi cmd_list cb.\n");
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_cmd_list.heci_cb.cb_list, cb_list) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext_tmp != NULL) &&
+ (file_ext_tmp == &dev->iamthif_file_ext)) {
+ status = pthi_write(dev, priv_cb_pos);
+ if (status != 0) {
+ DBG("pthi write failed status = %d\n",
+ status);
+ return;
+ }
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * heci_free_cb_private - free heci_cb_private related memory
+ *
+ * @priv_cb: heci callback struct
+ */
+void heci_free_cb_private(struct heci_cb_private *priv_cb)
+{
+ if (priv_cb == NULL)
+ return;
+
+ kfree(priv_cb->request_buffer.data);
+ kfree(priv_cb->response_buffer.data);
+ kfree(priv_cb);
+}
+
^ permalink raw reply related [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-07-18 17:39 ` Marcin Obara
@ 2008-07-18 19:23 ` Marcin Obara
2008-07-18 20:30 ` Marcin Obara
0 siblings, 1 reply; 42+ messages in thread
From: Marcin Obara @ 2008-07-18 19:23 UTC (permalink / raw)
To: linux-kernel
Fixed more issues raised on lkml after previous submission.
The Intel Management Engine Interface (aka HECI: Host Embedded
Controller Interface ) enables communication between the host OS and
the Management Engine firmware. MEI is bi-directional, and either the
host or Intel AMT firmware can initiate transactions.
The core hardware architecture of Intel Active Management Technology
(Intel AMT) is resident in firmware. The micro-controller within the
chipset's graphics and memory controller (GMCH) hub houses the
Management Engine (ME) firmware, which implements various services
on behalf of management applications.
Some of the ME subsystems that can be access via MEI driver:
- Intel(R) Quiet System Technology (QST) is implemented as a firmware
subsystem that runs in the ME. Programs that wish to expose the
health monitoring and fan speed control capabilities of Intel(R) QST
will need to use the MEI driver to communicate with the ME sub-system.
- ASF is the "Alert Standard Format" which is an DMTF manageability
standard. It is implemented in the PC's hardware and firmware, and is
managed from a remote console.
Most recent Intel desktop chipsets have one or more of the above ME
services. The MEI driver will make it possible to support the above
features on Linux and provides applications access to the ME and it's
features.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Signed-off-by: Marcin Obara <marcin.obara@intel.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 93fd6b2..adb913b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2195,6 +2195,15 @@ L: e1000-devel@lists.sourceforge.net
W: http://e1000.sourceforge.net/
S: Supported
+INTEL MANAGEABILITY ENGINE INTERFACE (HECI)
+P: Anas Nashif
+M: anas.nashif@intel.com
+P: Marcin Obara
+M: marcin.obara@intel.com
+W: http://www.openamt.org/
+L: openamt-devel@lists.sourceforge.net
+S: Supported
+
INTEL PRO/WIRELESS 2100 NETWORK CONNECTION SUPPORT
P: Zhu Yi
M: yi.zhu@intel.com
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 650e6b4..9872215 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -1103,6 +1103,7 @@ config DEVPORT
default y
source "drivers/s390/char/Kconfig"
+source "drivers/char/heci/Kconfig"
endmenu
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 0e0d12a..1d5e700 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -107,6 +107,7 @@ obj-$(CONFIG_IPMI_HANDLER) += ipmi/
obj-$(CONFIG_HANGCHECK_TIMER) += hangcheck-timer.o
obj-$(CONFIG_TCG_TPM) += tpm/
+obj-$(CONFIG_INTEL_MEI) += heci/
obj-$(CONFIG_PS3_FLASH) += ps3flash.o
diff --git a/drivers/char/heci/Kconfig b/drivers/char/heci/Kconfig
new file mode 100644
index 0000000..99b7d05
--- /dev/null
+++ b/drivers/char/heci/Kconfig
@@ -0,0 +1,12 @@
+#
+# HECI device configuration
+#
+
+config INTEL_MEI
+ tristate "Intel Management Engine Interface (MEI) Support (EXPERIMENTAL)"
+ depends on EXPERIMENTAL
+ ---help---
+ The Intel Management Engine Interface (Intel MEI) driver allows
+ applications to access the Active Management Technology
+ firmware and other Management Engine sub-systems.
+
diff --git a/drivers/char/heci/Makefile b/drivers/char/heci/Makefile
new file mode 100644
index 0000000..a2d7182
--- /dev/null
+++ b/drivers/char/heci/Makefile
@@ -0,0 +1,7 @@
+#
+## Makefile for the Intel MEI driver (heci)
+#
+
+obj-$(CONFIG_INTEL_MEI) += heci.o
+
+heci-objs := heci_init.o heci_interface.o heci_main.o interrupt.o io_heci.o
diff --git a/drivers/char/heci/heci.h b/drivers/char/heci/heci.h
new file mode 100644
index 0000000..9b279f3
--- /dev/null
+++ b/drivers/char/heci/heci.h
@@ -0,0 +1,176 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_H_
+#define _HECI_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+extern const struct guid heci_pthi_guid;
+extern const struct guid heci_wd_guid;
+extern const __u8 heci_start_wd_params[];
+extern const __u8 heci_stop_wd_params[];
+extern const __u8 heci_wd_state_independence_msg[3][4];
+
+/*
+ * heci device ID
+ */
+#define HECI_DEV_ID_82946GZ 0x2974 /* 82946GZ/GL */
+#define HECI_DEV_ID_82G35 0x2984 /* 82G35 Express */
+#define HECI_DEV_ID_82Q965 0x2994 /* 82Q963/Q965 */
+#define HECI_DEV_ID_82G965 0x29A4 /* 82P965/G965 */
+
+#define HECI_DEV_ID_82GM965 0x2A04 /* Mobile PM965/GM965 */
+#define HECI_DEV_ID_82GME965 0x2A14 /* Mobile GME965/GLE960 */
+
+#define HECI_DEV_ID_ICH9_82Q35 0x29B4 /* 82Q35 Express */
+#define HECI_DEV_ID_ICH9_82G33 0x29C4 /* 82G33/G31/P35/P31 Express */
+#define HECI_DEV_ID_ICH9_82Q33 0x29D4 /* 82Q33 Express */
+#define HECI_DEV_ID_ICH9_82X38 0x29E4 /* 82X38/X48 Express */
+#define HECI_DEV_ID_ICH9_3200 0x29F4 /* 3200/3210 Server */
+
+#define HECI_DEV_ID_ICH9_6 0x28B4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_7 0x28C4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_8 0x28D4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_9 0x28E4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_10 0x28F4 /* Bearlake */
+
+#define HECI_DEV_ID_ICH9M_1 0x2A44 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_2 0x2A54 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_3 0x2A64 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_4 0x2A74 /* Cantiga */
+
+#define HECI_DEV_ID_ICH10_1 0x2E04 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_2 0x2E14 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_3 0x2E24 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_4 0x2E34 /* Eaglelake */
+
+/*
+ * heci init function prototypes
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev);
+void heci_reset(struct iamt_heci_device *dev, int interrupts);
+int heci_hw_init(struct iamt_heci_device *dev);
+int heci_task_initialize_clients(void *data);
+int heci_initialize_clients(struct iamt_heci_device *dev);
+struct heci_file_private *heci_alloc_file_private(struct file *file);
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev);
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext);
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id);
+
+/*
+ * interrupt function prototype
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id);
+
+void heci_wd_timer(unsigned long data);
+
+/*
+ * input output function prototype
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file);
+
+int heci_ioctl_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_bypass_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_start_read(struct iamt_heci_device *dev, int if_num,
+ struct heci_file_private *file_ext);
+
+int pthi_write(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb);
+
+int pthi_read(struct iamt_heci_device *dev, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset);
+
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct file *file);
+
+void run_next_iamthif_cmd(struct iamt_heci_device *dev);
+
+void heci_free_cb_private(struct heci_cb_private *priv_cb);
+
+/**
+ * heci_fe_same_id - tell if file private data have same id
+ *
+ * @fe1: private data of 1. file object
+ * @fe2: private data of 2. file object
+ *
+ * returns !=0 - if ids are the same, 0 - if differ.
+ */
+static inline int heci_fe_same_id(const struct heci_file_private *fe1,
+ const struct heci_file_private *fe2)
+{
+ return ((fe1->host_client_id == fe2->host_client_id)
+ && (fe1->me_client_id == fe2->me_client_id));
+}
+
+#endif /* _HECI_H_ */
diff --git a/drivers/char/heci/heci_data_structures.h b/drivers/char/heci/heci_data_structures.h
new file mode 100644
index 0000000..beacf7c
--- /dev/null
+++ b/drivers/char/heci/heci_data_structures.h
@@ -0,0 +1,536 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_DATA_STRUCTURES_H_
+#define _HECI_DATA_STRUCTURES_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+
+/*
+ * error code definition
+ */
+#define ESLOTS_OVERFLOW 1
+#define ECORRUPTED_MESSAGE_HEADER 1000
+#define ECOMPLETE_MESSAGE 1001
+
+#define HECI_FC_MESSAGE_RESERVED_LENGTH 5
+
+/*
+ * Number of queue lists used by this driver
+ */
+#define HECI_IO_LISTS_NUMBER 7
+
+/*
+ * Maximum transmission unit (MTU) of heci messages
+ */
+#define IAMTHIF_MTU 4160
+
+
+/*
+ * HECI HW Section
+ */
+
+/* HECI registers */
+/* H_CB_WW - Host Circular Buffer (CB) Write Window register */
+#define H_CB_WW 0
+/* H_CSR - Host Control Status register */
+#define H_CSR 4
+/* ME_CB_RW - ME Circular Buffer Read Window register (read only) */
+#define ME_CB_RW 8
+/* ME_CSR_HA - ME Control Status Host Access register (read only) */
+#define ME_CSR_HA 0xC
+
+
+/* register bits of H_CSR (Host Control Status register) */
+/* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */
+#define H_CBD 0xFF000000
+/* Host Circular Buffer Write Pointer */
+#define H_CBWP 0x00FF0000
+/* Host Circular Buffer Read Pointer */
+#define H_CBRP 0x0000FF00
+/* Host Reset */
+#define H_RST 0x00000010
+/* Host Ready */
+#define H_RDY 0x00000008
+/* Host Interrupt Generate */
+#define H_IG 0x00000004
+/* Host Interrupt Status */
+#define H_IS 0x00000002
+/* Host Interrupt Enable */
+#define H_IE 0x00000001
+
+
+/* register bits of ME_CSR_HA (ME Control Status Host Access register) */
+/* ME CB (Circular Buffer) Depth HRA (Host Read Access)
+ * - host read only access to ME_CBD */
+#define ME_CBD_HRA 0xFF000000
+/* ME CB Write Pointer HRA - host read only access to ME_CBWP */
+#define ME_CBWP_HRA 0x00FF0000
+/* ME CB Read Pointer HRA - host read only access to ME_CBRP */
+#define ME_CBRP_HRA 0x0000FF00
+/* ME Reset HRA - host read only access to ME_RST */
+#define ME_RST_HRA 0x00000010
+/* ME Ready HRA - host read only access to ME_RDY */
+#define ME_RDY_HRA 0x00000008
+/* ME Interrupt Generate HRA - host read only access to ME_IG */
+#define ME_IG_HRA 0x00000004
+/* ME Interrupt Status HRA - host read only access to ME_IS */
+#define ME_IS_HRA 0x00000002
+/* ME Interrupt Enable HRA - host read only access to ME_IE */
+#define ME_IE_HRA 0x00000001
+
+#define HECI_MINORS_BASE 1
+#define HECI_MINORS_COUNT 1
+
+#define HECI_MINOR_NUMBER 1
+#define HECI_MAX_OPEN_HANDLE_COUNT 253
+
+/*
+ * debug kernel print macro define
+ */
+extern int heci_debug;
+extern struct device *heci_dev;
+
+#define DBG(format, arg...) do { \
+ if (heci_debug) { \
+ if (heci_dev) \
+ dev_info(heci_dev, "%s: " format, __func__, ## arg); \
+ else \
+ printk(KERN_INFO "heci: %s: " format, \
+ __func__, ## arg); \
+ } \
+} while (0)
+
+
+/*
+ * time to wait HECI become ready after init
+ */
+#define HECI_INTEROP_TIMEOUT (HZ * 7)
+
+/*
+ * watch dog definition
+ */
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+#define HECI_WD_STATE_INDEPENDENCE_MSG_SENT (1 << 0)
+
+#define HECI_WD_HOST_CLIENT_ID 1
+#define HECI_IAMTHIF_HOST_CLIENT_ID 2
+
+struct guid {
+ __u32 data1;
+ __u16 data2;
+ __u16 data3;
+ __u8 data4[8];
+};
+
+/* File state */
+enum file_state {
+ HECI_FILE_INITIALIZING = 0,
+ HECI_FILE_CONNECTING,
+ HECI_FILE_CONNECTED,
+ HECI_FILE_DISCONNECTING,
+ HECI_FILE_DISCONNECTED
+};
+
+/* HECI device states */
+enum heci_states {
+ HECI_INITIALIZING = 0,
+ HECI_ENABLED,
+ HECI_RESETING,
+ HECI_DISABLED,
+ HECI_RECOVERING_FROM_RESET,
+ HECI_POWER_DOWN,
+ HECI_POWER_UP
+};
+
+enum iamthif_states {
+ HECI_IAMTHIF_IDLE,
+ HECI_IAMTHIF_WRITING,
+ HECI_IAMTHIF_FLOW_CONTROL,
+ HECI_IAMTHIF_READING,
+ HECI_IAMTHIF_READ_COMPLETE
+};
+
+enum heci_file_transaction_states {
+ HECI_IDLE,
+ HECI_WRITING,
+ HECI_WRITE_COMPLETE,
+ HECI_FLOW_CONTROL,
+ HECI_READING,
+ HECI_READ_COMPLETE
+};
+
+/* HECI CB */
+enum heci_cb_major_types {
+ HECI_READ = 0,
+ HECI_WRITE,
+ HECI_IOCTL,
+ HECI_OPEN,
+ HECI_CLOSE
+};
+
+/* HECI user data struct */
+struct heci_message_data {
+ __u32 size;
+ char *data;
+} __attribute__((packed));
+
+#define HECI_CONNECT_TIMEOUT 3 /* at least 2 seconds */
+
+#define IAMTHIF_STALL_TIMER 12 /* seconds */
+#define IAMTHIF_READ_TIMER 15 /* seconds */
+
+struct heci_cb_private {
+ struct list_head cb_list;
+ enum heci_cb_major_types major_file_operations;
+ void *file_private;
+ struct heci_message_data request_buffer;
+ struct heci_message_data response_buffer;
+ unsigned long information;
+ unsigned long read_time;
+ struct file *file_object;
+};
+
+/* Private file struct */
+struct heci_file_private {
+ struct list_head link;
+ struct file *file;
+ enum file_state state;
+ wait_queue_head_t tx_wait;
+ wait_queue_head_t rx_wait;
+ wait_queue_head_t wait;
+ spinlock_t file_lock; /* file lock */
+ spinlock_t read_io_lock; /* read lock */
+ spinlock_t write_io_lock; /* write lock */
+ int read_pending;
+ int status;
+ /* ID of client connected */
+ __u8 host_client_id;
+ __u8 me_client_id;
+ __u8 flow_ctrl_creds;
+ __u8 timer_count;
+ enum heci_file_transaction_states reading_state;
+ enum heci_file_transaction_states writing_state;
+ int sm_state;
+ struct heci_cb_private *read_cb;
+};
+
+struct io_heci_list {
+ struct heci_cb_private heci_cb;
+ int status;
+ struct iamt_heci_device *device_extension;
+};
+
+struct heci_driver_version {
+ __u8 major;
+ __u8 minor;
+ __u8 hotfix;
+ __u16 build;
+} __attribute__((packed));
+
+
+struct heci_client {
+ __u32 max_msg_length;
+ __u8 protocol_version;
+} __attribute__((packed));
+
+/*
+ * HECI BUS Interface Section
+ */
+struct heci_msg_hdr {
+ __u32 me_addr:8;
+ __u32 host_addr:8;
+ __u32 length:9;
+ __u32 reserved:6;
+ __u32 msg_complete:1;
+} __attribute__((packed));
+
+
+struct hbm_cmd {
+ __u8 cmd:7;
+ __u8 is_response:1;
+} __attribute__((packed));
+
+
+struct heci_bus_message {
+ struct hbm_cmd cmd;
+ __u8 command_specific_data[];
+} __attribute__((packed));
+
+struct hbm_version {
+ __u8 minor_version;
+ __u8 major_version;
+} __attribute__((packed));
+
+struct hbm_host_version_request {
+ struct hbm_cmd cmd;
+ __u8 reserved;
+ struct hbm_version host_version;
+} __attribute__((packed));
+
+struct hbm_host_version_response {
+ struct hbm_cmd cmd;
+ int host_version_supported;
+ struct hbm_version me_max_version;
+} __attribute__((packed));
+
+struct hbm_host_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_stop_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_me_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_enum_request {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_host_enum_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+ __u8 valid_addresses[32];
+} __attribute__((packed));
+
+struct heci_client_properties {
+ struct guid protocol_name;
+ __u8 protocol_version;
+ __u8 max_number_of_connections;
+ __u8 fixed_address;
+ __u8 single_recv_buf;
+ __u32 max_msg_length;
+} __attribute__((packed));
+
+struct hbm_props_request {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+
+struct hbm_props_response {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 status;
+ __u8 reserved[1];
+ struct heci_client_properties client_properties;
+} __attribute__((packed));
+
+struct hbm_client_connect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved;
+} __attribute__((packed));
+
+struct hbm_client_connect_response {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 status;
+} __attribute__((packed));
+
+struct hbm_client_disconnect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[1];
+} __attribute__((packed));
+
+struct hbm_flow_control {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[HECI_FC_MESSAGE_RESERVED_LENGTH];
+} __attribute__((packed));
+
+struct heci_me_client {
+ struct heci_client_properties props;
+ __u8 client_id;
+ __u8 flow_ctrl_creds;
+} __attribute__((packed));
+
+/* private device struct */
+struct iamt_heci_device {
+ struct pci_dev *pdev; /* pointer to pci device struct */
+ /*
+ * lists of queues
+ */
+ /* array of pointers to aio lists */
+ struct io_heci_list *io_list_array[HECI_IO_LISTS_NUMBER];
+ struct io_heci_list read_list; /* driver read queue */
+ struct io_heci_list write_list; /* driver write queue */
+ struct io_heci_list write_waiting_list; /* write waiting queue */
+ struct io_heci_list ctrl_wr_list; /* managed write IOCTL list */
+ struct io_heci_list ctrl_rd_list; /* managed read IOCTL list */
+ struct io_heci_list pthi_cmd_list; /* PTHI list for cmd waiting */
+
+ /* driver managed PTHI list for reading completed pthi cmd data */
+ struct io_heci_list pthi_read_complete_list;
+ /*
+ * list of files
+ */
+ struct list_head file_list;
+ /*
+ * memory of device
+ */
+ unsigned int mem_base;
+ unsigned int mem_length;
+ char *mem_addr;
+ /*
+ * lock for the device
+ */
+ spinlock_t device_lock; /* device lock*/
+ struct work_struct work;
+ int recvd_msg;
+
+ struct task_struct *reinit_tsk;
+
+ struct timer_list wd_timer;
+ /*
+ * hw states of host and fw(ME)
+ */
+ __u32 host_hw_state;
+ __u32 me_hw_state;
+ /*
+ * waiting queue for receive message from FW
+ */
+ wait_queue_head_t wait_recvd_msg;
+ wait_queue_head_t wait_stop_wd;
+ /*
+ * heci device states
+ */
+ enum heci_states heci_state;
+ int stop;
+
+ __u32 extra_write_index;
+ __u32 rd_msg_buf[128]; /* used for control messages */
+ __u32 wr_msg_buf[128]; /* used for control messages */
+ __u32 ext_msg_buf[8]; /* for control responses */
+ __u32 rd_msg_hdr;
+
+ struct hbm_version version;
+
+ int host_buffer_is_empty;
+ struct heci_file_private wd_file_ext;
+ struct heci_me_client *me_clients; /* Note: memory has to be allocated*/
+ __u8 heci_me_clients[32]; /* list of existing clients */
+ __u8 num_heci_me_clients;
+ __u8 heci_host_clients[32]; /* list of existing clients */
+ __u8 current_host_client_id;
+
+ int wd_pending;
+ int wd_stoped;
+ __u16 wd_timeout; /* seconds ((wd_data[1] << 8) + wd_data[0]) */
+ unsigned char wd_data[HECI_START_WD_DATA_SIZE];
+
+
+ __u16 wd_due_counter;
+ int asf_mode;
+ int wd_bypass; /* if 1, don't refresh watchdog ME client */
+
+ struct file *iamthif_file_object;
+ struct heci_file_private iamthif_file_ext;
+ int iamthif_ioctl;
+ int iamthif_canceled;
+ __u32 iamthif_timer;
+ __u32 iamthif_stall_timer;
+ unsigned char iamthif_msg_buf[IAMTHIF_MTU];
+ __u32 iamthif_msg_buf_size;
+ __u32 iamthif_msg_buf_index;
+ int iamthif_flow_control_pending;
+ enum iamthif_states iamthif_state;
+
+ struct heci_cb_private *iamthif_current_cb;
+ __u8 write_hang;
+ int need_reset;
+ long open_handle_count;
+
+};
+
+/**
+ * read_heci_register - Read a byte from the heci device
+ *
+ * @dev: the device structure
+ * @offset: offset from which to read the data
+ *
+ * returns the byte read.
+ */
+static inline __u32 read_heci_register(struct iamt_heci_device *dev,
+ unsigned long offset)
+{
+ return readl(dev->mem_addr + offset);
+}
+
+/**
+ * write_heci_register - Write 4 bytes to the heci device
+ *
+ * @dev: the device structure
+ * @offset: offset from which to write the data
+ * @value: the byte to write
+ */
+static inline void write_heci_register(struct iamt_heci_device *dev,
+ unsigned long offset, __u32 value)
+{
+ writel(value, dev->mem_addr + offset);
+}
+
+#endif /* _HECI_DATA_STRUCTURES_H_ */
diff --git a/drivers/char/heci/heci_init.c b/drivers/char/heci/heci_init.c
new file mode 100644
index 0000000..ccdec30
--- /dev/null
+++ b/drivers/char/heci/heci_init.c
@@ -0,0 +1,1080 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/moduleparam.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+
+#include "heci_data_structures.h"
+#include "heci_interface.h"
+#include "heci.h"
+
+
+const __u8 watch_dog_data[] = {
+ 1, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
+};
+const __u8 heci_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 };
+const __u8 heci_stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10 };
+
+const __u8 heci_wd_state_independence_msg[3][4] = {
+ {0x05, 0x02, 0x51, 0x10},
+ {0x05, 0x02, 0x52, 0x10},
+ {0x07, 0x02, 0x01, 0x10}
+};
+
+const struct guid heci_asf_guid = {
+ 0x75B30CD6, 0xA29E, 0x4AF7,
+ {0xA7, 0x12, 0xE6, 0x17, 0x43, 0x93, 0xC8, 0xA6}
+};
+const struct guid heci_wd_guid = {
+ 0x05B79A6F, 0x4628, 0x4D7F,
+ {0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB}
+};
+const struct guid heci_pthi_guid = {
+ 0x12f80028, 0xb4b7, 0x4b2d,
+ {0xac, 0xa8, 0x46, 0xe0, 0xff, 0x65, 0x81, 0x4c}
+};
+
+
+/*
+ * heci init function prototypes
+ */
+static void heci_check_asf_mode(struct iamt_heci_device *dev);
+static int host_start_message(struct iamt_heci_device *dev);
+static int host_enum_clients_message(struct iamt_heci_device *dev);
+static int allocate_me_clients_storage(struct iamt_heci_device *dev);
+static void host_init_wd(struct iamt_heci_device *dev);
+static void host_init_iamthif(struct iamt_heci_device *dev);
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout);
+
+
+/**
+ * heci_initialize_list - Sets up a queue list.
+ *
+ * @list: An instance of our list structure
+ * @dev: Device object for our driver
+ */
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev)
+{
+ /* initialize our queue list */
+ INIT_LIST_HEAD(&list->heci_cb.cb_list);
+ list->status = 0;
+ list->device_extension = dev;
+}
+
+/**
+ * heci_flush_queues - flush our queues list belong to file_ext.
+ *
+ * @dev: Device object for our driver
+ * @file_ext: private data of the file object
+ */
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int i;
+
+ if (!dev || !file_ext)
+ return;
+
+ /* flush our queue list belong to file_ext */
+ for (i = 0; i < HECI_IO_LISTS_NUMBER; i++) {
+ DBG("remove list entry belong to file_ext\n");
+ heci_flush_list(dev->io_list_array[i], file_ext);
+ }
+}
+
+
+/**
+ * heci_flush_list - remove list entry belong to file_ext.
+ *
+ * @list: An instance of our list structure
+ * @file_ext: private data of the file object
+ */
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext)
+{
+ struct heci_file_private *file_ext_tmp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if (!list || !file_ext)
+ return;
+
+ if (list->status != 0)
+ return;
+
+ if (list_empty(&list->heci_cb.cb_list))
+ return;
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &list->heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos) {
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext_tmp) {
+ if (heci_fe_same_id(file_ext, file_ext_tmp))
+ list_del(&priv_cb_pos->cb_list);
+ }
+ }
+ }
+}
+
+/**
+ * heci_reset_iamthif_params - initializes heci device iamthif
+ *
+ * @dev: The heci device structure
+ */
+static void heci_reset_iamthif_params(struct iamt_heci_device *dev)
+{
+ /* reset iamthif parameters. */
+ dev->iamthif_current_cb = NULL;
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_file_ext.file = NULL;
+ dev->iamthif_ioctl = 0;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+}
+
+/**
+ * init_heci_device - allocates and initializes the heci device structure
+ *
+ * @pdev: The pci device structure
+ *
+ * returns The heci_device_device pointer on success, NULL on failure.
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev)
+{
+ int i;
+ struct iamt_heci_device *dev;
+
+ dev = kzalloc(sizeof(struct iamt_heci_device), GFP_KERNEL);
+ if (!dev)
+ return NULL;
+
+ /* setup our list array */
+ dev->io_list_array[0] = &dev->read_list;
+ dev->io_list_array[1] = &dev->write_list;
+ dev->io_list_array[2] = &dev->write_waiting_list;
+ dev->io_list_array[3] = &dev->ctrl_wr_list;
+ dev->io_list_array[4] = &dev->ctrl_rd_list;
+ dev->io_list_array[5] = &dev->pthi_cmd_list;
+ dev->io_list_array[6] = &dev->pthi_read_complete_list;
+ INIT_LIST_HEAD(&dev->file_list);
+ INIT_LIST_HEAD(&dev->wd_file_ext.link);
+ INIT_LIST_HEAD(&dev->iamthif_file_ext.link);
+ spin_lock_init(&dev->device_lock);
+ init_waitqueue_head(&dev->wait_recvd_msg);
+ init_waitqueue_head(&dev->wait_stop_wd);
+ dev->heci_state = HECI_INITIALIZING;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+
+ /* init work for schedule work */
+ INIT_WORK(&dev->work, NULL);
+ for (i = 0; i < HECI_IO_LISTS_NUMBER; i++)
+ heci_initialize_list(dev->io_list_array[i], dev);
+ dev->pdev = pdev;
+ return dev;
+}
+
+
+
+
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout)
+{
+ return wait_event_interruptible_timeout(dev->wait_recvd_msg,
+ (dev->recvd_msg), timeout);
+}
+
+/**
+ * heci_hw_init - init host and fw to start work.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_hw_init(struct iamt_heci_device *dev)
+{
+ int err = 0;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ DBG("host_hw_state = 0x%08x, mestate = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ /* acknowledge interrupt and stop interupts */
+ heci_set_csr_register(dev);
+ }
+ dev->recvd_msg = 0;
+ DBG("reset in start the heci device.\n");
+
+ heci_reset(dev, 1);
+
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ /* wait for ME to turn on ME_RDY */
+ if (!dev->recvd_msg)
+ err = heci_wait_event_int_timeout(dev, HECI_INTEROP_TIMEOUT);
+
+ if (!err && !dev->recvd_msg) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("wait_event_interruptible_timeout failed"
+ "on wait for ME to turn on ME_RDY.\n");
+ return -ENODEV;
+ } else {
+ if (!(((dev->host_hw_state & H_RDY) == H_RDY)
+ && ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state,
+ dev->me_hw_state);
+
+ if (!(dev->host_hw_state & H_RDY) != H_RDY)
+ DBG("host turn off H_RDY.\n");
+
+ if (!(dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ DBG("ME turn off ME_RDY.\n");
+
+ printk(KERN_ERR
+ "heci: link layer initialization failed.\n");
+ return -ENODEV;
+ }
+ }
+ dev->recvd_msg = 0;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+ DBG("ME turn on ME_RDY and host turn on H_RDY.\n");
+ printk(KERN_INFO "heci: link layer has been established.\n");
+ return 0;
+}
+
+/**
+ * heci_hw_reset - reset fw via heci csr register.
+ *
+ * @dev: Device object for our driver
+ * @interrupts: if interrupt should be enable after reset.
+ */
+static void heci_hw_reset(struct iamt_heci_device *dev, int interrupts)
+{
+ dev->host_hw_state |= (H_RST | H_IG);
+
+ if (interrupts)
+ heci_csr_enable_interrupts(dev);
+ else
+ heci_csr_disable_interrupts(dev);
+
+ BUG_ON((dev->host_hw_state & H_RST) != H_RST);
+ BUG_ON((dev->host_hw_state & H_RDY) != 0);
+}
+
+/**
+ * heci_reset - reset host and fw.
+ *
+ * @dev: Device object for our driver
+ * @interrupts: if interrupt should be enable after reset.
+ */
+void heci_reset(struct iamt_heci_device *dev, int interrupts)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int unexpected = 0;
+
+ if (dev->heci_state == HECI_RECOVERING_FROM_RESET) {
+ dev->need_reset = 1;
+ return;
+ }
+
+ if (dev->heci_state != HECI_INITIALIZING &&
+ dev->heci_state != HECI_DISABLED &&
+ dev->heci_state != HECI_POWER_DOWN &&
+ dev->heci_state != HECI_POWER_UP)
+ unexpected = 1;
+
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+
+ DBG("before reset host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ heci_hw_reset(dev, interrupts);
+
+ dev->host_hw_state &= ~H_RST;
+ dev->host_hw_state |= H_IG;
+
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+
+ DBG("currently saved host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ dev->need_reset = 0;
+
+ if (dev->heci_state != HECI_INITIALIZING) {
+ if ((dev->heci_state != HECI_DISABLED) &&
+ (dev->heci_state != HECI_POWER_DOWN))
+ dev->heci_state = HECI_RESETING;
+
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->flow_ctrl_creds = 0;
+ file_pos->read_cb = NULL;
+ file_pos->timer_count = 0;
+ }
+ /* remove entry if already in list */
+ DBG("list del iamthif and wd file list.\n");
+ heci_remove_client_from_file_list(dev,
+ dev->wd_file_ext.host_client_id);
+
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+
+ heci_reset_iamthif_params(dev);
+ dev->wd_due_counter = 0;
+ dev->extra_write_index = 0;
+ }
+
+ dev->num_heci_me_clients = 0;
+ dev->rd_msg_hdr = 0;
+ dev->stop = 0;
+ dev->wd_pending = 0;
+
+ /* update the state of the registers after reset */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ DBG("after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if (unexpected)
+ printk(KERN_WARNING "heci: unexpected reset.\n");
+
+ /* Wake up all readings so they can be interrupted */
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (&file_pos->rx_wait &&
+ waitqueue_active(&file_pos->rx_wait)) {
+ printk(KERN_INFO "heci: Waking up client!\n");
+ wake_up_interruptible(&file_pos->rx_wait);
+ }
+ }
+ /* remove all waiting requests */
+ if (dev->write_list.status == 0 &&
+ !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos) {
+ list_del(&priv_cb_pos->cb_list);
+ heci_free_cb_private(priv_cb_pos);
+ }
+ }
+ }
+}
+
+/**
+ * heci_initialize_clients - heci communication initialization.
+ *
+ * @dev: Device object for our driver
+ */
+int heci_initialize_clients(struct iamt_heci_device *dev)
+{
+ int status;
+
+ msleep(100); /* FW needs time to be ready to talk with us */
+ DBG("link is established start sending messages.\n");
+ /* link is established start sending messages. */
+ status = host_start_message(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("start sending messages failed.\n");
+ return status;
+ }
+
+ /* enumerate clients */
+ status = host_enum_clients_message(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("enum clients failed.\n");
+ return status;
+ }
+ /* allocate storage for ME clients representation */
+ status = allocate_me_clients_storage(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->num_heci_me_clients = 0;
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("allocate clients failed.\n");
+ return status;
+ }
+
+ heci_check_asf_mode(dev);
+ /*heci initialization wd */
+ host_init_wd(dev);
+ /*heci initialization iamthif client */
+ host_init_iamthif(dev);
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->need_reset) {
+ dev->need_reset = 0;
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+
+ memset(dev->heci_host_clients, 0, sizeof(dev->heci_host_clients));
+ dev->open_handle_count = 0;
+ dev->heci_host_clients[0] |= 7;
+ dev->current_host_client_id = 3;
+ dev->heci_state = HECI_ENABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("initialization heci clients successful.\n");
+ return 0;
+}
+
+/**
+ * heci_task_initialize_clients - heci reinitialization task
+ *
+ * @data: Device object for our driver
+ */
+int heci_task_initialize_clients(void *data)
+{
+ int ret;
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->reinit_tsk != NULL) {
+ spin_unlock_bh(&dev->device_lock);
+ DBG("reinit task already started.\n");
+ return 0;
+ }
+ dev->reinit_tsk = current;
+ current->flags |= PF_NOFREEZE;
+ spin_unlock_bh(&dev->device_lock);
+
+ ret = heci_initialize_clients(dev);
+
+ spin_lock_bh(&dev->device_lock);
+ dev->reinit_tsk = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ return ret;
+}
+
+/**
+ * host_start_message - heci host send start message.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_start_message(struct iamt_heci_device *dev)
+{
+ long timeout = 60; /* 60 second */
+
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_version_request *host_start_req;
+ struct hbm_host_stop_request *host_stop_req;
+ int err = 0;
+
+ /* host start message */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_version_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_start_req =
+ (struct hbm_host_version_request *) &dev->wr_msg_buf[1];
+ memset(host_start_req, 0, sizeof(struct hbm_host_version_request));
+ host_start_req->cmd.cmd = HOST_START_REQ_CMD;
+ host_start_req->host_version.major_version = HBM_MAJOR_VERSION;
+ host_start_req->host_version.minor_version = HBM_MINOR_VERSION;
+ dev->recvd_msg = 0;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_start_req),
+ heci_hdr->length)) {
+ DBG("send version to fw fail.\n");
+ return -ENODEV;
+ }
+ DBG("call wait_event_interruptible_timeout for response message.\n");
+ /* wait for response */
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait_timeout failed on host start response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ DBG("wait_timeout successful on host start response message.\n");
+ if ((dev->version.major_version != HBM_MAJOR_VERSION) ||
+ (dev->version.minor_version != HBM_MINOR_VERSION)) {
+ /* send stop message */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_stop_req =
+ (struct hbm_host_stop_request *) &dev->wr_msg_buf[1];
+
+ memset(host_stop_req, 0, sizeof(struct hbm_host_stop_request));
+ host_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ host_stop_req->reason = DRIVER_STOP_REQUEST;
+ heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_stop_req),
+ heci_hdr->length);
+ DBG("version mismatch.\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/**
+ * host_enum_clients_message - host send enumeration client request message.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_enum_clients_message(struct iamt_heci_device *dev)
+{
+ long timeout = 5; /*5 second */
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_enum_request *host_enum_req;
+ int err = 0;
+ __u8 i, j;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ /* enumerate clients */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_enum_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1];
+ memset(host_enum_req, 0, sizeof(struct hbm_host_enum_request));
+ host_enum_req->cmd.cmd = HOST_ENUM_REQ_CMD;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_enum_req),
+ heci_hdr->length)) {
+ DBG("send enumeration request failed.\n");
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait_event_interruptible_timeout failed "
+ "on enumeration clients response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+
+ spin_lock_bh(&dev->device_lock);
+ /* count how many ME clients we have */
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0)
+ dev->num_heci_me_clients++;
+
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ return 0;
+}
+
+/**
+ * host_client_properties - reads properties for client
+ *
+ * @dev: Device object for our driver
+ * @idx: client index in me client array
+ * @client_id: id of the client
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_client_properties(struct iamt_heci_device *dev,
+ struct heci_me_client *client)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_props_request *host_cli_req;
+ int err;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_props_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_cli_req = (struct hbm_props_request *) &dev->wr_msg_buf[1];
+ memset(host_cli_req, 0, sizeof(struct hbm_props_request));
+ host_cli_req->cmd.cmd = HOST_CLIENT_PROPERTEIS_REQ_CMD;
+ host_cli_req->address = client->client_id;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_cli_req),
+ heci_hdr->length)) {
+ DBG("send props request failed.\n");
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev, 10 * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait failed on props resp msg.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ return 0;
+}
+
+/**
+ * allocate_me_clients_storage - allocate storage for me clients
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int allocate_me_clients_storage(struct iamt_heci_device *dev)
+{
+ struct heci_me_client *clients;
+ struct heci_me_client *client;
+ __u8 num, i, j;
+ int err;
+
+ if (dev->num_heci_me_clients <= 0)
+ return 0;
+
+ spin_lock_bh(&dev->device_lock);
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ /* allocate storage for ME clients representation */
+ clients = kcalloc(dev->num_heci_me_clients,
+ sizeof(struct heci_me_client), GFP_KERNEL);
+ if (!clients) {
+ DBG("memory allocation for ME clients failed.\n");
+ return -ENOMEM;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ dev->me_clients = clients;
+ spin_unlock_bh(&dev->device_lock);
+
+ num = 0;
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0) {
+ client = &dev->me_clients[num];
+ client->client_id = (i * 8) + j;
+ client->flow_ctrl_creds = 0;
+ err = host_client_properties(dev, client);
+ if (err != 0) {
+ spin_lock_bh(&dev->device_lock);
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+ spin_unlock_bh(&dev->device_lock);
+ return err;
+ }
+ num++;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * heci_init_file_private - initializes private file structure.
+ *
+ * @priv: private file structure to be initialized
+ * @file: the file structure
+ */
+static void heci_init_file_private(struct heci_file_private *priv,
+ struct file *file)
+{
+ memset(priv, 0, sizeof(struct heci_file_private));
+ spin_lock_init(&priv->file_lock);
+ spin_lock_init(&priv->read_io_lock);
+ spin_lock_init(&priv->write_io_lock);
+ init_waitqueue_head(&priv->wait);
+ init_waitqueue_head(&priv->rx_wait);
+ DBG("priv->rx_wait =%p\n", &priv->rx_wait);
+ init_waitqueue_head(&priv->tx_wait);
+ INIT_LIST_HEAD(&priv->link);
+ priv->reading_state = HECI_IDLE;
+ priv->writing_state = HECI_IDLE;
+}
+
+/**
+ * heci_find_me_client - search for ME client guid
+ * sets client_id in heci_file_private if found
+ * @dev: Device object for our driver
+ * @priv: private file structure to set client_id in
+ * @cguid: searched guid of ME client
+ * @client_id: id of host client to be set in file private structure
+ *
+ * returns ME client index
+ */
+static __u8 heci_find_me_client(struct iamt_heci_device *dev,
+ struct heci_file_private *priv,
+ const struct guid *cguid, __u8 client_id)
+{
+ __u8 i;
+
+ if ((dev == NULL) || (priv == NULL) || (cguid == NULL))
+ return 0;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(cguid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ priv->me_client_id = dev->me_clients[i].client_id;
+ priv->state = HECI_FILE_CONNECTING;
+ priv->host_client_id = client_id;
+
+ list_add_tail(&priv->link, &dev->file_list);
+ return i;
+ }
+ }
+ return 0;
+}
+
+/**
+ * heci_check_asf_mode - check for ASF client
+ *
+ * @dev: Device object for our driver
+ */
+static void heci_check_asf_mode(struct iamt_heci_device *dev)
+{
+ __u8 i;
+
+ spin_lock_bh(&dev->device_lock);
+ dev->asf_mode = 0;
+ /* find ME ASF client - otherwise assume AMT mode */
+ DBG("find ME ASF client - otherwise assume AMT mode.\n");
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_asf_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ dev->asf_mode = 1;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("found ME ASF client.\n");
+ return;
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+ DBG("assume AMT mode.\n");
+}
+
+/**
+ * heci_connect_me_client - connect ME client
+ * @dev: Device object for our driver
+ * @priv: private file structure
+ * @timeout: connect timeout in seconds
+ *
+ * returns 1 - if connected, 0 - if not
+ */
+static __u8 heci_connect_me_client(struct iamt_heci_device *dev,
+ struct heci_file_private *priv,
+ long timeout)
+{
+ int err = 0;
+
+ if ((dev == NULL) || (priv == NULL))
+ return 0;
+
+ if (!heci_connect(dev, priv)) {
+ DBG("failed to call heci_connect for client_id=%d.\n",
+ priv->host_client_id);
+ spin_lock_bh(&dev->device_lock);
+ heci_remove_client_from_file_list(dev, priv->host_client_id);
+ priv->state = HECI_FILE_DISCONNECTED;
+ spin_unlock_bh(&dev->device_lock);
+ return 0;
+ }
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == priv->state ||
+ HECI_FILE_DISCONNECTED == priv->state),
+ timeout * HZ);
+ if (HECI_FILE_CONNECTED != priv->state) {
+ spin_lock_bh(&dev->device_lock);
+ heci_remove_client_from_file_list(dev, priv->host_client_id);
+ DBG("failed to connect client_id=%d state=%d.\n",
+ priv->host_client_id, priv->state);
+ if (err)
+ DBG("failed connect err=%08x\n", err);
+ priv->state = HECI_FILE_DISCONNECTED;
+ spin_unlock_bh(&dev->device_lock);
+ return 0;
+ }
+ DBG("successfully connected client_id=%d.\n",
+ priv->host_client_id);
+ return 1;
+}
+
+/**
+ * host_init_wd - heci initialization wd.
+ *
+ * @dev: Device object for our driver
+ */
+static void host_init_wd(struct iamt_heci_device *dev)
+{
+ spin_lock_bh(&dev->device_lock);
+
+ heci_init_file_private(&dev->wd_file_ext, NULL);
+
+ /* look for WD client and connect to it */
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTED;
+ dev->wd_timeout = 0;
+
+ if (dev->asf_mode) {
+ memcpy(dev->wd_data, heci_stop_wd_params, HECI_WD_PARAMS_SIZE);
+ } else {
+ /* AMT mode */
+ dev->wd_timeout = AMT_WD_VALUE;
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ memcpy(dev->wd_data, heci_start_wd_params, HECI_WD_PARAMS_SIZE);
+ memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
+ &dev->wd_timeout, sizeof(__u16));
+ }
+
+ /* find ME WD client */
+ heci_find_me_client(dev, &dev->wd_file_ext,
+ &heci_wd_guid, HECI_WD_HOST_CLIENT_ID);
+ spin_unlock_bh(&dev->device_lock);
+
+ DBG("check wd_file_ext\n");
+ if (HECI_FILE_CONNECTING == dev->wd_file_ext.state) {
+ if (heci_connect_me_client(dev, &dev->wd_file_ext, 15) == 1) {
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 1;
+ else
+ dev->wd_due_counter = 0;
+ DBG("successfully connected to WD client.\n");
+ }
+ } else
+ DBG("failed to find WD client.\n");
+
+
+ spin_lock_bh(&dev->device_lock);
+ dev->wd_timer.function = &heci_wd_timer;
+ dev->wd_timer.data = (unsigned long) dev;
+ spin_unlock_bh(&dev->device_lock);
+}
+
+
+/**
+ * host_init_iamthif - heci initialization iamthif client.
+ *
+ * @dev: Device object for our driver
+ *
+ */
+static void host_init_iamthif(struct iamt_heci_device *dev)
+{
+ __u8 i;
+
+ spin_lock_bh(&dev->device_lock);
+
+ heci_init_file_private(&dev->iamthif_file_ext, NULL);
+ dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTED;
+
+ /* find ME PTHI client */
+ i = heci_find_me_client(dev, &dev->iamthif_file_ext,
+ &heci_pthi_guid, HECI_IAMTHIF_HOST_CLIENT_ID);
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTING) {
+ DBG("failed to find iamthif client.\n");
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ BUG_ON(dev->me_clients[i].props.max_msg_length != IAMTHIF_MTU);
+
+ spin_unlock_bh(&dev->device_lock);
+ if (heci_connect_me_client(dev, &dev->iamthif_file_ext, 15) == 1) {
+ DBG("connected to iamthif client.\n");
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ }
+}
+
+/**
+ * heci_alloc_file_private - allocates a private file structure and set it up.
+ * @file: the file structure
+ *
+ * returns The allocated file or NULL on failure
+ */
+struct heci_file_private *heci_alloc_file_private(struct file *file)
+{
+ struct heci_file_private *priv;
+
+ priv = kmalloc(sizeof(struct heci_file_private), GFP_KERNEL);
+ if (!priv)
+ return NULL;
+
+ heci_init_file_private(priv, file);
+
+ return priv;
+}
+
+
+
+/**
+ * heci_disconnect_host_client - send disconnect message to fw from host client.
+ *
+ * @dev: Device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int rets, err;
+ long timeout = 15; /* 15 seconds */
+ struct heci_cb_private *priv_cb;
+
+ if ((!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext->state != HECI_FILE_DISCONNECTING)
+ return 0;
+
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->file_private = file_ext;
+ priv_cb->major_file_operations = HECI_CLOSE;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (heci_disconnect(dev, file_ext)) {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ DBG("failed to call heci_disconnect.\n");
+ goto free;
+ }
+ } else {
+ DBG("add disconnect cb to control write list\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+ if (HECI_FILE_DISCONNECTED == file_ext->state) {
+ rets = 0;
+ DBG("successfully disconnected from fw client.\n");
+ } else {
+ rets = -ENODEV;
+ if (HECI_FILE_DISCONNECTED != file_ext->state)
+ DBG("wrong status client disconnect.\n");
+
+ if (err)
+ DBG("wait failed disconnect err=%08x\n", err);
+
+ DBG("failed to disconnect from fw client.\n");
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_list(&dev->ctrl_rd_list, file_ext);
+ heci_flush_list(&dev->ctrl_wr_list, file_ext);
+ spin_unlock_bh(&dev->device_lock);
+free:
+ heci_free_cb_private(priv_cb);
+ return rets;
+}
+
+/**
+ * heci_remove_client_from_file_list -
+ * remove file private data from device file list
+ *
+ * @dev: Device object for our driver
+ * @host_client_id: host client id to be removed
+ */
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (host_client_id == file_pos->host_client_id) {
+ DBG("remove host client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del_init(&file_pos->link);
+ break;
+ }
+ }
+}
diff --git a/drivers/char/heci/heci_interface.c b/drivers/char/heci/heci_interface.c
new file mode 100644
index 0000000..c5f51a7
--- /dev/null
+++ b/drivers/char/heci/heci_interface.c
@@ -0,0 +1,485 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include "heci.h"
+#include "heci_interface.h"
+
+
+/**
+ * heci_set_csr_register - write H_CSR register to the heci device
+ *
+ * @dev: device object for our driver
+ */
+void heci_set_csr_register(struct iamt_heci_device *dev)
+{
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+}
+
+/**
+ * heci_csr_enable_interrupts - enable heci device interrupts
+ *
+ * @dev: device object for our driver
+ */
+void heci_csr_enable_interrupts(struct iamt_heci_device *dev)
+{
+ dev->host_hw_state |= H_IE;
+ heci_set_csr_register(dev);
+}
+
+/**
+ * heci_csr_disable_interrupts - disable heci device interrupts
+ *
+ * @dev: device object for our driver
+ */
+void heci_csr_disable_interrupts(struct iamt_heci_device *dev)
+{
+ dev->host_hw_state &= ~H_IE;
+ heci_set_csr_register(dev);
+}
+
+
+/**
+ * _host_get_filled_slots - get number of device filled buffer slots
+ *
+ * @device: the device structure
+ *
+ * returns numer of filled slots
+ */
+static unsigned char _host_get_filled_slots(const struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+
+ read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8);
+ write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16);
+
+ return (unsigned char) (write_ptr - read_ptr);
+}
+
+/**
+ * host_buffer_is_empty - check if host buffer is empty.
+ *
+ * @dev: device object for our driver
+ *
+ * returns 1 if empty, 0 - otherwise.
+ */
+int host_buffer_is_empty(struct iamt_heci_device *dev)
+{
+ unsigned char filled_slots;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ filled_slots = _host_get_filled_slots(dev);
+
+ if (filled_slots > 0)
+ return 0;
+
+ return 1;
+}
+
+/**
+ * count_empty_write_slots - count write empty slots.
+ *
+ * @dev: device object for our driver
+ *
+ * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise empty slots count
+ */
+__s32 count_empty_write_slots(const struct iamt_heci_device *dev)
+{
+ unsigned char buffer_depth, filled_slots, empty_slots;
+
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = _host_get_filled_slots(dev);
+ empty_slots = buffer_depth - filled_slots;
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ return (__s32) empty_slots;
+}
+
+/**
+ * heci_write_message - write a message to heci device.
+ *
+ * @dev: device object for our driver
+ * @heci_hdr: header of message
+ * @write_buffer: message buffer will be write
+ * @write_length: message size will be write
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length)
+{
+ __u32 temp_msg = 0;
+ unsigned long bytes_written = 0;
+ unsigned char buffer_depth, filled_slots, empty_slots;
+ unsigned long dw_to_write;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ DBG("host_hw_state = 0x%08x.\n", dev->host_hw_state);
+ DBG("heci_write_message header=%08x.\n", *((__u32 *) header));
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = _host_get_filled_slots(dev);
+ empty_slots = buffer_depth - filled_slots;
+ DBG("filled = %hu, empty = %hu.\n", filled_slots, empty_slots);
+
+ dw_to_write = ((write_length + 3) / 4);
+
+ if (dw_to_write > empty_slots)
+ return 0;
+
+ write_heci_register(dev, H_CB_WW, *((__u32 *) header));
+
+ while (write_length >= 4) {
+ write_heci_register(dev, H_CB_WW,
+ *(__u32 *) (write_buffer + bytes_written));
+ bytes_written += 4;
+ write_length -= 4;
+ }
+
+ if (write_length > 0) {
+ memcpy(&temp_msg, &write_buffer[bytes_written], write_length);
+ write_heci_register(dev, H_CB_WW, temp_msg);
+ }
+
+ dev->host_hw_state |= H_IG;
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ if ((dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ return 0;
+
+ dev->write_hang = 0;
+ return 1;
+}
+
+/**
+ * count_full_read_slots - count read full slots.
+ *
+ * @dev: device object for our driver
+ *
+ * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise filled slots count
+ */
+__s32 count_full_read_slots(struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+ unsigned char buffer_depth, filled_slots;
+
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ buffer_depth = (unsigned char)((dev->me_hw_state & ME_CBD_HRA) >> 24);
+ read_ptr = (char) ((dev->me_hw_state & ME_CBRP_HRA) >> 8);
+ write_ptr = (char) ((dev->me_hw_state & ME_CBWP_HRA) >> 16);
+ filled_slots = (unsigned char) (write_ptr - read_ptr);
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ DBG("filled_slots =%08x \n", filled_slots);
+ return (__s32) filled_slots;
+}
+
+/**
+ * heci_read_slots - read a message from heci device.
+ *
+ * @dev: device object for our driver
+ * @buffer: message buffer will be write
+ * @buffer_length: message size will be read
+ */
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length)
+{
+ __u32 i = 0;
+ unsigned char temp_buf[sizeof(__u32)];
+
+ while (buffer_length >= sizeof(__u32)) {
+ ((__u32 *) buffer)[i] = read_heci_register(dev, ME_CB_RW);
+ DBG("buffer[%d]= %d\n", i, ((__u32 *) buffer)[i]);
+ i++;
+ buffer_length -= sizeof(__u32);
+ }
+
+ if (buffer_length > 0) {
+ *((__u32 *) &temp_buf) = read_heci_register(dev, ME_CB_RW);
+ memcpy(&buffer[i * 4], temp_buf, buffer_length);
+ }
+
+ dev->host_hw_state |= H_IG;
+ heci_set_csr_register(dev);
+}
+
+/**
+ * flow_ctrl_creds - check flow_control credentials.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if flow_ctrl_creds >0, 0 - otherwise.
+ */
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return 0;
+
+ if (file_ext == NULL)
+ return 0;
+
+ if (file_ext->flow_ctrl_creds > 0)
+ return 1;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].flow_ctrl_creds > 0) {
+ BUG_ON(dev->me_clients[i].props.single_recv_buf
+ == 0);
+ return 1;
+ }
+ return 0;
+ }
+ }
+ BUG();
+ return 0;
+}
+
+/**
+ * flow_ctrl_reduce - reduce flow_control.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ */
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].props.single_recv_buf != 0) {
+ BUG_ON(dev->me_clients[i].flow_ctrl_creds <= 0);
+ dev->me_clients[i].flow_ctrl_creds--;
+ } else {
+ BUG_ON(file_ext->flow_ctrl_creds <= 0);
+ file_ext->flow_ctrl_creds--;
+ }
+ return;
+ }
+ }
+ BUG();
+}
+
+/**
+ * heci_send_flow_control - send flow control to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_flow_control *heci_flow_control;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_flow_control);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_flow_control = (struct hbm_flow_control *) &dev->wr_msg_buf[1];
+ memset(heci_flow_control, 0, sizeof(heci_flow_control));
+ heci_flow_control->host_addr = file_ext->host_client_id;
+ heci_flow_control->me_addr = file_ext->me_client_id;
+ heci_flow_control->cmd.cmd = HECI_FLOW_CONTROL_CMD;
+ memset(heci_flow_control->reserved, 0,
+ sizeof(heci_flow_control->reserved));
+ DBG("sending flow control host client = %d, me client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_flow_control,
+ sizeof(struct hbm_flow_control)))
+ return 0;
+
+ return 1;
+
+}
+
+/**
+ * other_client_is_connecting - check if other
+ * client with the same client id is connected.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if other client is connected, 0 - otherwise.
+ */
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if ((file_pos->state == HECI_FILE_CONNECTING)
+ && (file_pos != file_ext)
+ && file_ext->me_client_id == file_pos->me_client_id)
+ return 1;
+
+ }
+ return 0;
+}
+
+/**
+ * heci_send_wd - send watch dog message to fw.
+ *
+ * @dev: device object for our driver
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_send_wd(struct iamt_heci_device *dev)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = dev->wd_file_ext.host_client_id;
+ heci_hdr->me_addr = dev->wd_file_ext.me_client_id;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ if (!memcmp(dev->wd_data, heci_start_wd_params,
+ HECI_WD_PARAMS_SIZE)) {
+ heci_hdr->length = HECI_START_WD_DATA_SIZE;
+ } else {
+ BUG_ON(memcmp(dev->wd_data, heci_stop_wd_params,
+ HECI_WD_PARAMS_SIZE));
+ heci_hdr->length = HECI_WD_PARAMS_SIZE;
+ }
+
+ if (!heci_write_message(dev, heci_hdr, dev->wd_data, heci_hdr->length))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_disconnect - send disconnect message to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_disconnect_request *heci_cli_disconnect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_disconnect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_disconnect =
+ (struct hbm_client_disconnect_request *) &dev->wr_msg_buf[1];
+ memset(heci_cli_disconnect, 0, sizeof(heci_cli_disconnect));
+ heci_cli_disconnect->host_addr = file_ext->host_client_id;
+ heci_cli_disconnect->me_addr = file_ext->me_client_id;
+ heci_cli_disconnect->cmd.cmd = CLIENT_DISCONNECT_REQ_CMD;
+ heci_cli_disconnect->reserved[0] = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_disconnect,
+ sizeof(struct hbm_client_disconnect_request)))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_connect - send connect message to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_request *heci_cli_connect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_connect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_connect =
+ (struct hbm_client_connect_request *) &dev->wr_msg_buf[1];
+ heci_cli_connect->host_addr = file_ext->host_client_id;
+ heci_cli_connect->me_addr = file_ext->me_client_id;
+ heci_cli_connect->cmd.cmd = CLIENT_CONNECT_REQ_CMD;
+ heci_cli_connect->reserved = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_connect,
+ sizeof(struct hbm_client_connect_request)))
+ return 0;
+
+ return 1;
+}
diff --git a/drivers/char/heci/heci_interface.h b/drivers/char/heci/heci_interface.h
new file mode 100644
index 0000000..37336eb
--- /dev/null
+++ b/drivers/char/heci/heci_interface.h
@@ -0,0 +1,170 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#ifndef _HECI_INTERFACE_H_
+#define _HECI_INTERFACE_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+
+#define HBM_MINOR_VERSION 0
+#define HBM_MAJOR_VERSION 1
+#define HBM_TIMEOUT 1 /* 1 second */
+
+
+#define HOST_START_REQ_CMD 0x01
+#define HOST_START_RES_CMD 0x81
+
+#define HOST_STOP_REQ_CMD 0x02
+#define HOST_STOP_RES_CMD 0x82
+
+#define ME_STOP_REQ_CMD 0x03
+
+#define HOST_ENUM_REQ_CMD 0x04
+#define HOST_ENUM_RES_CMD 0x84
+
+#define HOST_CLIENT_PROPERTEIS_REQ_CMD 0x05
+#define HOST_CLIENT_PROPERTEIS_RES_CMD 0x85
+
+#define CLIENT_CONNECT_REQ_CMD 0x06
+#define CLIENT_CONNECT_RES_CMD 0x86
+
+#define CLIENT_DISCONNECT_REQ_CMD 0x07
+#define CLIENT_DISCONNECT_RES_CMD 0x87
+
+#define HECI_FLOW_CONTROL_CMD 0x08
+
+
+#define AMT_WD_VALUE 120 /* seconds */
+
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+
+/* IOCTL commands */
+#define IOCTL_HECI_GET_VERSION \
+ _IOWR('H' , 0x0, struct heci_message_data)
+#define IOCTL_HECI_CONNECT_CLIENT \
+ _IOWR('H' , 0x01, struct heci_message_data)
+#define IOCTL_HECI_WD \
+ _IOWR('H' , 0x02, struct heci_message_data)
+#define IOCTL_HECI_BYPASS_WD \
+ _IOWR('H' , 0x10, struct heci_message_data)
+
+enum heci_stop_reason_types{
+ DRIVER_STOP_REQUEST = 0x00,
+ DEVICE_D1_ENTRY = 0x01,
+ DEVICE_D2_ENTRY = 0x02,
+ DEVICE_D3_ENTRY = 0x03,
+ SYSTEM_S1_ENTRY = 0x04,
+ SYSTEM_S2_ENTRY = 0x05,
+ SYSTEM_S3_ENTRY = 0x06,
+ SYSTEM_S4_ENTRY = 0x07,
+ SYSTEM_S5_ENTRY = 0x08
+};
+
+enum me_stop_reason_types{
+ FW_UPDATE = 0x00
+};
+
+enum client_connect_status_types{
+ CCS_SUCCESS = 0x00,
+ CCS_NOT_FOUND = 0x01,
+ CCS_ALREADY_STARTED = 0x02,
+ CCS_OUT_OF_RESOURCES = 0x03,
+ CCS_MESSAGE_SMALL = 0x04
+};
+
+enum client_disconnect_status_types{
+ CDS_SUCCESS = 0x00
+};
+
+
+/*
+ * heci interface function prototypes
+ */
+void heci_set_csr_register(struct iamt_heci_device *dev);
+void heci_csr_enable_interrupts(struct iamt_heci_device *dev);
+void heci_csr_disable_interrupts(struct iamt_heci_device *dev);
+
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length);
+
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length);
+
+int host_buffer_is_empty(struct iamt_heci_device *dev);
+
+__s32 count_full_read_slots(struct iamt_heci_device *dev);
+
+__s32 count_empty_write_slots(const struct iamt_heci_device *dev);
+
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_wd(struct iamt_heci_device *dev);
+
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+#endif /* _HECI_INTERFACE_H_ */
diff --git a/drivers/char/heci/heci_main.c b/drivers/char/heci/heci_main.c
new file mode 100644
index 0000000..9eaa828
--- /dev/null
+++ b/drivers/char/heci/heci_main.c
@@ -0,0 +1,1562 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/device.h>
+#include <linux/unistd.h>
+#include <linux/kthread.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+#define HECI_READ_TIMEOUT 45
+
+#define HECI_DRIVER_NAME "heci"
+
+/*
+ * heci driver strings
+ */
+char heci_driver_name[] = HECI_DRIVER_NAME;
+char heci_driver_string[] = "Intel(R) Management Engine Interface";
+char heci_driver_version[] = HECI_DRIVER_VERSION;
+char heci_copyright[] = "Copyright (c) 2003 - 2008 Intel Corporation.";
+
+
+#ifdef HECI_DEBUG
+int heci_debug = 1;
+#else
+int heci_debug;
+#endif
+MODULE_PARM_DESC(heci_debug, "Debug enabled or not");
+module_param(heci_debug, int, 0644);
+
+
+#define HECI_DEV_NAME "heci"
+
+/* heci char device for registration */
+static struct cdev heci_cdev;
+
+/* major number for device */
+static int heci_major;
+/* The device pointer */
+static struct pci_dev *heci_device;
+
+struct class *heci_class;
+struct device *heci_dev;
+
+
+/* heci_pci_tbl - PCI Device ID Table */
+static struct pci_device_id heci_pci_tbl[] = {
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82946GZ)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82Q965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GM965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GME965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82G33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82X38)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_3200)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_6)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_7)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_8)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_9)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_10)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_4)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_4)},
+ /* required last entry */
+ {0, }
+};
+
+MODULE_DEVICE_TABLE(pci, heci_pci_tbl);
+
+/*
+ * Local Function Prototypes
+ */
+static int __init heci_init_module(void);
+static void __exit heci_exit_module(void);
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent);
+static void __devexit heci_remove(struct pci_dev *pdev);
+static int heci_open(struct inode *inode, struct file *file);
+static int heci_release(struct inode *inode, struct file *file);
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset);
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data);
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset);
+static unsigned int heci_poll(struct file *file, poll_table *wait);
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state);
+static int heci_resume(struct pci_dev *pdev);
+static __u16 g_sus_wd_timeout;
+#else
+#define heci_suspend NULL
+#define heci_resume NULL
+#endif
+/*
+ * PCI driver structure
+ */
+static struct pci_driver heci_driver = {
+ .name = heci_driver_name,
+ .id_table = heci_pci_tbl,
+ .probe = heci_probe,
+ .remove = __devexit_p(heci_remove),
+ .shutdown = __devexit_p(heci_remove),
+ .suspend = heci_suspend,
+ .resume = heci_resume
+};
+
+/*
+ * file operations structure will be use heci char device.
+ */
+static struct file_operations heci_fops = {
+ .owner = THIS_MODULE,
+ .read = heci_read,
+ .ioctl = heci_ioctl,
+ .open = heci_open,
+ .release = heci_release,
+ .write = heci_write,
+ .poll = heci_poll,
+};
+
+/**
+ * heci_registration_cdev - set up the cdev structure for heci device.
+ *
+ * @dev: char device struct
+ * @hminor: minor number for registration char device
+ * @fops: file operations structure
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_registration_cdev(struct cdev *dev, int hminor,
+ struct file_operations *fops)
+{
+ int ret, devno = MKDEV(heci_major, hminor);
+
+ cdev_init(dev, fops);
+ dev->owner = THIS_MODULE;
+ ret = cdev_add(dev, devno, 1);
+ /* Fail gracefully if need be */
+ if (ret) {
+ printk(KERN_ERR "heci: Error %d registering heci device %d\n",
+ ret, hminor);
+ }
+ return ret;
+}
+
+/* Display the version of heci driver. */
+static ssize_t version_show(struct class *dev, char *buf)
+{
+ return sprintf(buf, "%s %s.\n",
+ heci_driver_string, heci_driver_version);
+}
+
+static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
+
+/**
+ * heci_register_cdev - registers heci char device
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_register_cdev(void)
+{
+ int ret;
+ dev_t dev;
+
+ /* registration of char devices */
+ ret = alloc_chrdev_region(&dev, HECI_MINORS_BASE, HECI_MINORS_COUNT,
+ HECI_DRIVER_NAME);
+ if (ret) {
+ printk(KERN_ERR "heci: Error allocating char device region.\n");
+ return ret;
+ }
+
+ heci_major = MAJOR(dev);
+
+ ret = heci_registration_cdev(&heci_cdev, HECI_MINOR_NUMBER,
+ &heci_fops);
+ if (ret)
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+
+ return ret;
+}
+
+/**
+ * heci_unregister_cdev - unregisters heci char device
+ */
+static void heci_unregister_cdev(void)
+{
+ cdev_del(&heci_cdev);
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+}
+
+/**
+ * heci_sysfs_device_create - adds device entry to sysfs
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_sysfs_device_create(void)
+{
+ struct class *class;
+ struct device *tmphdev;
+ int err = 0;
+
+ class = class_create(THIS_MODULE, HECI_DRIVER_NAME);
+ if (IS_ERR(class)) {
+ err = PTR_ERR(class);
+ printk(KERN_ERR "heci: Error creating heci class.\n");
+ goto err_out;
+ }
+
+ err = class_create_file(class, &class_attr_version);
+ if (err) {
+ class_destroy(class);
+ printk(KERN_ERR "heci: Error creating heci class file.\n");
+ goto err_out;
+ }
+
+ tmphdev = device_create(class, NULL, heci_cdev.dev, HECI_DEV_NAME);
+ if (IS_ERR(tmphdev)) {
+ err = PTR_ERR(tmphdev);
+ class_remove_file(class, &class_attr_version);
+ class_destroy(class);
+ goto err_out;
+ }
+
+ heci_dev = tmphdev;
+ heci_class = class;
+err_out:
+ return err;
+}
+
+/**
+ * heci_sysfs_device_remove - unregisters the device entry on sysfs
+ */
+static void heci_sysfs_device_remove(void)
+{
+ if ((heci_class == NULL) || (IS_ERR(heci_class)))
+ return;
+
+ heci_dev = NULL;
+ device_destroy(heci_class, heci_cdev.dev);
+ class_remove_file(heci_class, &class_attr_version);
+ class_destroy(heci_class);
+}
+
+/**
+ * heci_init_module - Driver Registration Routine
+ *
+ * heci_init_module is the first routine called when the driver is
+ * loaded. All it does is register with the PCI subsystem.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int __init heci_init_module(void)
+{
+ int ret = 0;
+
+ printk(KERN_INFO "heci: %s - version %s\n", heci_driver_string,
+ heci_driver_version);
+ printk(KERN_INFO "heci: %s\n", heci_copyright);
+
+ /* init pci module */
+ ret = pci_register_driver(&heci_driver);
+ if (ret < 0) {
+ printk(KERN_ERR "heci: Error registering driver.\n");
+ goto end;
+ }
+
+ ret = heci_register_cdev();
+ if (ret)
+ goto unregister_pci;
+
+ ret = heci_sysfs_device_create();
+ if (ret)
+ goto unregister_cdev;
+
+ return ret;
+
+unregister_cdev:
+ heci_unregister_cdev();
+unregister_pci:
+ pci_unregister_driver(&heci_driver);
+end:
+ return ret;
+}
+
+module_init(heci_init_module);
+
+
+/**
+ * heci_exit_module - Driver Exit Cleanup Routine
+ *
+ * heci_exit_module is called just before the driver is removed
+ * from memory.
+ */
+static void __exit heci_exit_module(void)
+{
+ pci_unregister_driver(&heci_driver);
+ heci_sysfs_device_remove();
+ heci_unregister_cdev();
+}
+
+module_exit(heci_exit_module);
+
+
+/**
+ * heci_probe - Device Initialization Routine
+ *
+ * @pdev: PCI device information struct
+ * @ent: entry in kcs_pci_tbl
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct iamt_heci_device *dev = NULL;
+ int i, err = 0;
+
+ if (heci_device) {
+ err = -EEXIST;
+ goto end;
+ }
+ /* enable pci dev */
+ err = pci_enable_device(pdev);
+ if (err) {
+ printk(KERN_ERR "heci: Failed to enable pci device.\n");
+ goto end;
+ }
+ /* set PCI host mastering */
+ pci_set_master(pdev);
+ /* pci request regions for heci driver */
+ err = pci_request_regions(pdev, heci_driver_name);
+ if (err) {
+ printk(KERN_ERR "heci: Failed to get pci regions.\n");
+ goto disable_device;
+ }
+ /* allocates and initializes the heci dev structure */
+ dev = init_heci_device(pdev);
+ if (!dev) {
+ err = -ENOMEM;
+ goto release_regions;
+ }
+ /* mapping IO device memory */
+ for (i = 0; i <= 5; i++) {
+ if (pci_resource_len(pdev, i) == 0)
+ continue;
+ if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
+ printk(KERN_ERR "heci: heci has IO ports.\n");
+ goto free_device;
+ } else if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
+ if (dev->mem_base) {
+ printk(KERN_ERR
+ "heci: Too many mem addresses.\n");
+ goto free_device;
+ }
+ dev->mem_base = pci_resource_start(pdev, i);
+ dev->mem_length = pci_resource_len(pdev, i);
+ }
+ }
+ if (!dev->mem_base) {
+ printk(KERN_ERR "heci: No address to use.\n");
+ err = -ENODEV;
+ goto free_device;
+ }
+ dev->mem_addr = ioremap_nocache(dev->mem_base,
+ dev->mem_length);
+ if (!dev->mem_addr) {
+ printk(KERN_ERR "heci: Remap IO device memory failure.\n");
+ err = -ENOMEM;
+ goto free_device;
+ }
+ /* request and enable interrupt */
+ err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, dev);
+ if (err) {
+ printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
+ pdev->irq);
+ goto unmap_memory;
+ }
+
+ if (heci_hw_init(dev)) {
+ printk(KERN_ERR "heci: Init hw failure.\n");
+ err = -ENODEV;
+ goto release_irq;
+ }
+ init_timer(&dev->wd_timer);
+
+ heci_initialize_clients(dev);
+ if (dev->heci_state != HECI_ENABLED) {
+ err = -ENODEV;
+ goto release_hw;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ heci_device = pdev;
+ pci_set_drvdata(pdev, dev);
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->wd_timeout)
+ mod_timer(&dev->wd_timer, jiffies);
+
+#ifdef CONFIG_PM
+ g_sus_wd_timeout = 0;
+#endif
+ printk(KERN_INFO "heci driver initialization successful.\n");
+ return 0;
+
+release_hw:
+ /* disable interrupts */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ heci_csr_disable_interrupts(dev);
+
+ del_timer_sync(&dev->wd_timer);
+
+ flush_scheduled_work();
+
+release_irq:
+ free_irq(pdev->irq, dev);
+unmap_memory:
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+free_device:
+ kfree(dev);
+release_regions:
+ pci_release_regions(pdev);
+disable_device:
+ pci_disable_device(pdev);
+end:
+ printk(KERN_ERR "heci driver initialization failed.\n");
+ return err;
+}
+
+/**
+ * heci_remove - Device Removal Routine
+ *
+ * @pdev: PCI device information struct
+ *
+ * heci_remove is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.
+ */
+static void __devexit heci_remove(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *dev = pci_get_drvdata(pdev);
+
+ if (heci_device != pdev)
+ return;
+
+ if (dev == NULL)
+ return;
+
+ spin_lock_bh(&dev->device_lock);
+ if (heci_device != pdev) {
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+
+ del_timer_sync(&dev->wd_timer);
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
+ && dev->wd_timeout) {
+ dev->wd_timeout = 0;
+ dev->wd_due_counter = 0;
+ memcpy(dev->wd_data, heci_stop_wd_params, HECI_WD_PARAMS_SIZE);
+ dev->stop = 1;
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+
+ if (!heci_send_wd(dev))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+ } else {
+ dev->wd_pending = 1;
+ }
+ dev->wd_stoped = 0;
+ spin_unlock_bh(&dev->device_lock);
+
+ wait_event_interruptible_timeout(dev->wait_stop_wd,
+ (dev->wd_stoped), 10 * HZ);
+ spin_lock_bh(&dev->device_lock);
+ if (!dev->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else
+ DBG("stop wd complete.\n");
+
+ }
+
+ heci_device = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->iamthif_file_ext.state == HECI_FILE_CONNECTED) {
+ dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->iamthif_file_ext);
+ }
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED) {
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->wd_file_ext);
+ }
+
+ spin_lock_bh(&dev->device_lock);
+
+ /* remove entry if already in list */
+ DBG("list del iamthif and wd file list.\n");
+ heci_remove_client_from_file_list(dev, dev->wd_file_ext.
+ host_client_id);
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+
+ dev->iamthif_current_cb = NULL;
+ dev->iamthif_file_ext.file = NULL;
+ dev->num_heci_me_clients = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ flush_scheduled_work();
+
+ /* disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ free_irq(pdev->irq, dev);
+ pci_set_drvdata(pdev, NULL);
+
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+
+ kfree(dev);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+}
+
+/**
+ * heci_clear_list - remove all callbacks associated with file
+ * from heci_cb_list
+ *
+ * @file: file information struct
+ * @heci_cb_list: callbacks list
+ *
+ * heci_clear_list is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * returns 1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_list(struct iamt_heci_device *dev,
+ struct file *file, struct list_head *heci_cb_list)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private*priv_cb_next = NULL;
+ struct file *file_temp;
+ int rets = 0;
+
+ /* list all list member */
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ heci_cb_list, cb_list) {
+ file_temp = (struct file *)priv_cb_pos->file_object;
+ /* check if list member associated with a file */
+ if (file_temp == file) {
+ /* remove member from the list */
+ list_del(&priv_cb_pos->cb_list);
+ /* check if cb equal to current iamthif cb */
+ if (dev->iamthif_current_cb == priv_cb_pos) {
+ dev->iamthif_current_cb = NULL;
+ /* send flow control to iamthif client */
+ heci_send_flow_control(dev,
+ &dev->iamthif_file_ext);
+ }
+ /* free all allocated buffers */
+ heci_free_cb_private(priv_cb_pos);
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_clear_lists - remove all callbacks associated with file
+ *
+ * @dev: device information struct
+ * @file: file information struct
+ *
+ * heci_clear_lists is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * returns 1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_lists(struct iamt_heci_device *dev, struct file *file)
+{
+ int rets = 0;
+
+ /* remove callbacks associated with a file */
+ heci_clear_list(dev, file, &dev->pthi_cmd_list.heci_cb.cb_list);
+ if (heci_clear_list(dev, file,
+ &dev->pthi_read_complete_list.heci_cb.cb_list))
+ rets = 1;
+
+ heci_clear_list(dev, file, &dev->ctrl_rd_list.heci_cb.cb_list);
+
+ if (heci_clear_list(dev, file, &dev->ctrl_wr_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file,
+ &dev->write_waiting_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file, &dev->write_list.heci_cb.cb_list))
+ rets = 1;
+
+ /* check if iamthif_current_cb not NULL */
+ if (dev->iamthif_current_cb && (!rets)) {
+ /* check file and iamthif current cb association */
+ if (dev->iamthif_current_cb->file_object == file) {
+ /* remove cb */
+ heci_free_cb_private(dev->iamthif_current_cb);
+ dev->iamthif_current_cb = NULL;
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_open - the open function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ *
+ * returns 0 on success, <0 on error
+ */
+static int heci_open(struct inode *inode, struct file *file)
+{
+ struct heci_file_private *file_ext;
+ int if_num = iminor(inode);
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ file_ext = heci_alloc_file_private(file);
+ if (file_ext == NULL)
+ return -ENOMEM;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENODEV;
+ }
+ if (dev->open_handle_count >= HECI_MAX_OPEN_HANDLE_COUNT) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENFILE;
+ };
+ dev->open_handle_count++;
+ list_add_tail(&file_ext->link, &dev->file_list);
+ while ((dev->heci_host_clients[dev->current_host_client_id / 8]
+ & (1 << (dev->current_host_client_id % 8))) != 0) {
+
+ dev->current_host_client_id++; /* allow overflow */
+ DBG("current_host_client_id = %d\n",
+ dev->current_host_client_id);
+ DBG("dev->open_handle_count = %lu\n",
+ dev->open_handle_count);
+ }
+ DBG("current_host_client_id = %d\n", dev->current_host_client_id);
+ file_ext->host_client_id = dev->current_host_client_id;
+ dev->heci_host_clients[file_ext->host_client_id / 8] |=
+ (1 << (file_ext->host_client_id % 8));
+ spin_unlock_bh(&dev->device_lock);
+ spin_lock(&file_ext->file_lock);
+ file_ext->state = HECI_FILE_INITIALIZING;
+ file_ext->sm_state = 0;
+
+ file->private_data = file_ext;
+ spin_unlock(&file_ext->file_lock);
+
+ return 0;
+}
+
+/**
+ * heci_release - the release function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ *
+ * returns 0 on success, <0 on error
+ */
+static int heci_release(struct inode *inode, struct file *file)
+{
+ int rets = 0;
+ int if_num = iminor(inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext != &dev->iamthif_file_ext) {
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state == HECI_FILE_CONNECTED) {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ spin_unlock(&file_ext->file_lock);
+ DBG("disconnecting client host client = %d, "
+ "ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+ rets = heci_disconnect_host_client(dev, file_ext);
+ spin_lock(&file_ext->file_lock);
+ }
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_queues(dev, file_ext);
+ DBG("remove client host client = %d, ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ if (dev->open_handle_count > 0) {
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ dev->open_handle_count--;
+ }
+ heci_remove_client_from_file_list(dev,
+ file_ext->host_client_id);
+
+ /* free read cb */
+ if (file_ext->read_cb != NULL) {
+ priv_cb = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb != NULL)
+ list_del(&priv_cb->cb_list);
+
+ priv_cb = file_ext->read_cb;
+ file_ext->read_cb = NULL;
+ }
+
+ spin_unlock_bh(&dev->device_lock);
+ file->private_data = NULL;
+ spin_unlock(&file_ext->file_lock);
+
+ if (priv_cb != NULL)
+ heci_free_cb_private(priv_cb);
+
+ kfree(file_ext);
+ } else {
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->open_handle_count > 0)
+ dev->open_handle_count--;
+
+ if (dev->iamthif_file_object == file
+ && dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi canceled iamthif state %d\n",
+ dev->iamthif_state);
+ dev->iamthif_canceled = 1;
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE) {
+ DBG("run next pthi iamthif cb\n");
+ run_next_iamthif_cmd(dev);
+ }
+ }
+
+ if (heci_clear_lists(dev, file))
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+
+ spin_unlock_bh(&dev->device_lock);
+ }
+ return rets;
+}
+
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ struct heci_file_private *file_ext_list_temp;
+
+ if (dev->read_list.status == 0
+ && !list_empty(&dev->read_list.heci_cb.cb_list)) {
+ DBG("remove read_list CB \n");
+ list_for_each_entry_safe(priv_cb_pos,
+ priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+
+ file_ext_list_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext_list_temp != NULL) &&
+ heci_fe_same_id(file_ext, file_ext_list_temp))
+ return priv_cb_pos;
+
+ }
+ }
+ return NULL;
+}
+
+/**
+ * heci_read - the read client message function.
+ *
+ * @file: pointer to file structure
+ * @ubuf: pointer to user buffer
+ * @length: buffer length
+ * @offset: data offset in buffer
+ *
+ * returns >=0 data length on success , <0 on error
+ */
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int i;
+ int rets = 0, err = 0;
+ int if_num = iminor(file->f_dentry->d_inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ spin_lock(&file_ext->file_lock);
+ if ((file_ext->sm_state & HECI_WD_STATE_INDEPENDENCE_MSG_SENT) == 0) {
+ spin_unlock(&file_ext->file_lock);
+ /* Do not allow to read watchdog client */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_wd_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (file_ext->me_client_id ==
+ dev->me_clients[i].client_id)
+ return -EBADF;
+ }
+ }
+ } else {
+ file_ext->sm_state &= ~HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+ }
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ rets = pthi_read(dev, if_num, file, ubuf, length, offset);
+ goto out;
+ }
+
+ if (file_ext->read_cb && file_ext->read_cb->information > *offset) {
+ priv_cb = file_ext->read_cb;
+ goto copy_buffer;
+ } else if (file_ext->read_cb && file_ext->read_cb->information > 0 &&
+ file_ext->read_cb->information <= *offset) {
+ priv_cb = file_ext->read_cb;
+ rets = 0;
+ goto free;
+ } else if ((!file_ext->read_cb || file_ext->read_cb->information == 0)
+ && *offset > 0) {
+ /*Offset needs to be cleaned for contingous reads*/
+ *offset = 0;
+ rets = 0;
+ goto out;
+ }
+
+ spin_lock(&file_ext->read_io_lock);
+ err = heci_start_read(dev, if_num, file_ext);
+ if (err != 0 && err != -EBUSY) {
+ DBG("heci start read failure with status = %d\n", err);
+ spin_unlock(&file_ext->read_io_lock);
+ rets = err;
+ goto out;
+ }
+ if (HECI_READ_COMPLETE != file_ext->reading_state
+ && !waitqueue_active(&file_ext->rx_wait)) {
+ if (file->f_flags & O_NONBLOCK) {
+ rets = -EAGAIN;
+ spin_unlock(&file_ext->read_io_lock);
+ goto out;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+
+ if (wait_event_interruptible(file_ext->rx_wait,
+ (HECI_READ_COMPLETE == file_ext->reading_state
+ || HECI_FILE_INITIALIZING == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTING == file_ext->state))) {
+ if (signal_pending(current)) {
+ rets = -EINTR;
+ goto out;
+ }
+ return -ERESTARTSYS;
+ }
+
+ if (HECI_FILE_INITIALIZING == file_ext->state ||
+ HECI_FILE_DISCONNECTED == file_ext->state ||
+ HECI_FILE_DISCONNECTING == file_ext->state) {
+ rets = -EBUSY;
+ goto out;
+ }
+ spin_lock(&file_ext->read_io_lock);
+ }
+
+ priv_cb = file_ext->read_cb;
+
+ if (!priv_cb) {
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENODEV;
+ }
+ if (file_ext->reading_state != HECI_READ_COMPLETE) {
+ spin_unlock(&file_ext->read_io_lock);
+ return 0;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+ /* now copy the data to user space */
+copy_buffer:
+ DBG("priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("priv_cb->information - %lu\n",
+ priv_cb->information);
+ if (length == 0 || ubuf == NULL ||
+ *offset > priv_cb->information) {
+ rets = -EMSGSIZE;
+ goto free;
+ }
+
+ /* length is being turncated to PAGE_SIZE, however, */
+ /* information size may be longer */
+ length = (length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset));
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length)) {
+ rets = -EFAULT;
+ goto free;
+ }
+
+ rets = length;
+ *offset += length;
+ if ((unsigned long)*offset < priv_cb->information)
+ goto out;
+
+free:
+ spin_lock_bh(&dev->device_lock);
+ priv_cb_pos = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb_pos != NULL)
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_cb);
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+out: DBG("end heci read rets= %d\n", rets);
+ return rets;
+}
+
+/**
+ * heci_write - the write function.
+ *
+ * @file: pointer to file structure
+ * @ubuf: pointer to user buffer
+ * @length: buffer length
+ * @offset: data offset in buffer
+ *
+ * returns >=0 data length on success , <0 on error
+ */
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int rets = 0;
+ __u8 i;
+ int if_num = iminor(file->f_dentry->d_inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_write_cb = NULL;
+ struct heci_msg_hdr heci_hdr;
+ struct iamt_heci_device *dev;
+ unsigned long currtime = get_seconds();
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb = find_pthi_read_list_entry(dev, file);
+ if ((priv_write_cb != NULL) &&
+ (((currtime - priv_write_cb->read_time) >
+ IAMTHIF_READ_TIMER) ||
+ (file_ext->reading_state == HECI_READ_COMPLETE))) {
+ (*offset) = 0;
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ priv_write_cb = NULL;
+ }
+ }
+
+ /* free entry used in read */
+ if (file_ext->reading_state == HECI_READ_COMPLETE) {
+ *offset = 0;
+ priv_write_cb = find_read_list_entry(dev, file_ext);
+ if (priv_write_cb != NULL) {
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ priv_write_cb = NULL;
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+ }
+ } else if (file_ext->reading_state == HECI_IDLE &&
+ file_ext->read_pending == 0)
+ (*offset) = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ priv_write_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_write_cb)
+ return -ENOMEM;
+
+ priv_write_cb->file_object = file;
+ priv_write_cb->file_private = file_ext;
+ priv_write_cb->request_buffer.data = kmalloc(length, GFP_KERNEL);
+ if (!priv_write_cb->request_buffer.data) {
+ kfree(priv_write_cb);
+ return -ENOMEM;
+ }
+ DBG("length =%d\n", (int) length);
+
+ if (copy_from_user(priv_write_cb->request_buffer.data,
+ ubuf, length)) {
+ rets = -EFAULT;
+ goto fail;
+ }
+
+ spin_lock(&file_ext->file_lock);
+ file_ext->sm_state = 0;
+ if ((length == 4) &&
+ ((memcmp(heci_wd_state_independence_msg[0], ubuf, 4) == 0) ||
+ (memcmp(heci_wd_state_independence_msg[1], ubuf, 4) == 0) ||
+ (memcmp(heci_wd_state_independence_msg[2], ubuf, 4) == 0)))
+ file_ext->sm_state |= HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+
+ INIT_LIST_HEAD(&priv_write_cb->cb_list);
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb->response_buffer.data =
+ kmalloc(IAMTHIF_MTU, GFP_KERNEL);
+ if (!priv_write_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->iamthif_file_ext.me_client_id)
+ break;
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients) ||
+ (dev->me_clients[i].client_id !=
+ dev->iamthif_file_ext.me_client_id)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ } else if ((length > dev->me_clients[i].props.max_msg_length)
+ || (length <= 0)) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -EMSGSIZE;
+ goto fail;
+ }
+
+
+ priv_write_cb->response_buffer.size = IAMTHIF_MTU;
+ priv_write_cb->major_file_operations = HECI_IOCTL;
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+
+ if (!list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)
+ || dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi_state = %d\n", (int) dev->iamthif_state);
+ DBG("add PTHI cb to pthi cmd waiting list\n");
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->pthi_cmd_list.heci_cb.cb_list);
+ rets = length;
+ } else {
+ DBG("call pthi write\n");
+ rets = pthi_write(dev, priv_write_cb);
+
+ if (rets != 0) {
+ DBG("pthi write failed with status = %d\n",
+ rets);
+ spin_unlock_bh(&dev->device_lock);
+ goto fail;
+ }
+ rets = length;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+ }
+
+ priv_write_cb->major_file_operations = HECI_WRITE;
+ /* make sure information is zero before we start */
+
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+
+ spin_lock(&file_ext->write_io_lock);
+ DBG("host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (file_ext->state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ DBG("host client = %d, is not connected to ME client = %d",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ goto unlock;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ file_ext->me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if (i == dev->num_heci_me_clients) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+ if (length > dev->me_clients[i].props.max_msg_length || length <= 0) {
+ rets = -EINVAL;
+ goto unlock;
+ }
+ priv_write_cb->file_private = file_ext;
+
+ spin_lock_bh(&dev->device_lock);
+ if (flow_ctrl_creds(dev, file_ext) &&
+ dev->host_buffer_is_empty) {
+ spin_unlock_bh(&dev->device_lock);
+ dev->host_buffer_is_empty = 0;
+ if (length > ((((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr))) {
+
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) -
+ sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = length;
+ heci_hdr.msg_complete = 1;
+ }
+ heci_hdr.host_addr = file_ext->host_client_id;
+ heci_hdr.me_addr = file_ext->me_client_id;
+ heci_hdr.reserved = 0;
+ DBG("call heci_write_message header=%08x.\n",
+ *((__u32 *) &heci_hdr));
+ spin_unlock(&file_ext->write_io_lock);
+ /* protect heci low level write */
+ spin_lock_bh(&dev->device_lock);
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *) (priv_write_cb->request_buffer.data),
+ heci_hdr.length)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_write_cb);
+ rets = -ENODEV;
+ priv_write_cb->information = 0;
+ return rets;
+ }
+ file_ext->writing_state = HECI_WRITING;
+ priv_write_cb->information = heci_hdr.length;
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, file_ext);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ } else {
+
+ spin_unlock_bh(&dev->device_lock);
+ priv_write_cb->information = 0;
+ file_ext->writing_state = HECI_WRITING;
+ spin_unlock(&file_ext->write_io_lock);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return length;
+
+unlock:
+ spin_unlock(&file_ext->write_io_lock);
+fail:
+ heci_free_cb_private(priv_write_cb);
+ return rets;
+
+}
+
+/**
+ * heci_ioctl - the IOCTL function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ * @cmd: ioctl command
+ * @data: pointer to heci message structure
+ *
+ * returns 0 on success , <0 on error
+ */
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data)
+{
+ int rets = 0;
+ int if_num = iminor(inode);
+ struct heci_file_private *file_ext = file->private_data;
+ /* in user space */
+ struct heci_message_data *u_msg = (struct heci_message_data *) data;
+ struct heci_message_data k_msg; /* all in kernel on the stack */
+ struct iamt_heci_device *dev;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ /* first copy from user all data needed */
+ if (copy_from_user(&k_msg, u_msg, sizeof(k_msg))) {
+ DBG("first copy from user all data needed filled\n");
+ return -EFAULT;
+ }
+ DBG("user message size is %d\n", k_msg.size);
+
+ switch (cmd) {
+ case IOCTL_HECI_GET_VERSION:
+ DBG(": IOCTL_HECI_GET_VERSION\n");
+ rets = heci_ioctl_get_version(dev, if_num, u_msg, k_msg,
+ file_ext);
+ break;
+
+ case IOCTL_HECI_CONNECT_CLIENT:
+ DBG(": IOCTL_HECI_CONNECT_CLIENT.\n");
+ rets = heci_ioctl_connect_client(dev, if_num, u_msg, k_msg,
+ file);
+ break;
+
+ case IOCTL_HECI_WD:
+ DBG(": IOCTL_HECI_WD.\n");
+ rets = heci_ioctl_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ case IOCTL_HECI_BYPASS_WD:
+ DBG(": IOCTL_HECI_BYPASS_WD.\n");
+ rets = heci_ioctl_bypass_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ default:
+ rets = -EINVAL;
+ break;
+ }
+ return rets;
+}
+
+/**
+ * heci_poll - the poll function
+ *
+ * @file: pointer to file structure
+ * @wait: pointer to poll_table structure
+ *
+ * returns poll mask
+ */
+static unsigned int heci_poll(struct file *file, poll_table *wait)
+{
+ int if_num = iminor(file->f_dentry->d_inode);
+ unsigned int mask = 0;
+ struct heci_file_private *file_ext = file->private_data;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return mask;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return mask;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return mask;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ poll_wait(file, &dev->iamthif_file_ext.wait, wait);
+ spin_lock(&dev->iamthif_file_ext.file_lock);
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE
+ && dev->iamthif_file_object == file) {
+ mask |= (POLLIN | POLLRDNORM);
+ spin_lock_bh(&dev->device_lock);
+ DBG("run next pthi cb\n");
+ run_next_iamthif_cmd(dev);
+ spin_unlock_bh(&dev->device_lock);
+ }
+ spin_unlock(&dev->iamthif_file_ext.file_lock);
+
+ } else{
+ poll_wait(file, &file_ext->tx_wait, wait);
+ spin_lock(&file_ext->write_io_lock);
+ if (HECI_WRITE_COMPLETE == file_ext->writing_state)
+ mask |= (POLLIN | POLLRDNORM);
+
+ spin_unlock(&file_ext->write_io_lock);
+ }
+
+ return mask;
+}
+
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct iamt_heci_device *dev = pci_get_drvdata(pdev);
+ int err = 0;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ /* Stop watchdog if exists */
+ del_timer_sync(&dev->wd_timer);
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
+ && dev->wd_timeout) {
+ spin_lock_bh(&dev->device_lock);
+ g_sus_wd_timeout = dev->wd_timeout;
+ dev->wd_timeout = 0;
+ dev->wd_due_counter = 0;
+ memcpy(dev->wd_data, heci_stop_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ dev->stop = 1;
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_wd(dev))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+ } else {
+ dev->wd_pending = 1;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ dev->wd_stoped = 0;
+
+ err = wait_event_interruptible_timeout(dev->wait_stop_wd,
+ (dev->wd_stoped),
+ 10 * HZ);
+ if (!dev->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else {
+ DBG("stop wd complete %d.\n", err);
+ err = 0;
+ }
+ }
+ /* Set new heci state */
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state == HECI_ENABLED ||
+ dev->heci_state == HECI_RECOVERING_FROM_RESET) {
+ dev->heci_state = HECI_POWER_DOWN;
+ heci_reset(dev, 0);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ pci_save_state(pdev);
+
+ pci_disable_device(pdev);
+ free_irq(pdev->irq, dev);
+
+ pci_set_power_state(pdev, PCI_D3hot);
+
+ return err;
+}
+
+static int heci_resume(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *dev;
+ int err = 0;
+
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+
+ dev = pci_get_drvdata(pdev);
+ if (!dev)
+ return -ENODEV;
+
+ /* request and enable interrupt */
+ err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, dev);
+ if (err) {
+ printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
+ pdev->irq);
+ return err;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_POWER_UP;
+ heci_reset(dev, 1);
+ spin_unlock_bh(&dev->device_lock);
+
+ /* Start watchdog if stopped in suspend */
+ if (g_sus_wd_timeout != 0) {
+ dev->wd_timeout = g_sus_wd_timeout;
+
+ memcpy(dev->wd_data, heci_start_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
+ &dev->wd_timeout, sizeof(__u16));
+ dev->wd_due_counter = 1;
+
+ if (dev->wd_timeout)
+ mod_timer(&dev->wd_timer, jiffies);
+
+ g_sus_wd_timeout = 0;
+ }
+ return err;
+}
+#endif
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(HECI_DRIVER_VERSION);
diff --git a/drivers/char/heci/heci_version.h b/drivers/char/heci/heci_version.h
new file mode 100644
index 0000000..797e84e
--- /dev/null
+++ b/drivers/char/heci/heci_version.h
@@ -0,0 +1,54 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef HECI_VERSION_H
+#define HECI_VERSION_H
+
+#define MAJOR_VERSION 5
+#define MINOR_VERSION 0
+#define QUICK_FIX_NUMBER 0
+#define VER_BUILD 30
+
+#define HECI_DRV_VER1 __stringify(MAJOR_VERSION) "." __stringify(MINOR_VERSION)
+#define HECI_DRV_VER2 __stringify(QUICK_FIX_NUMBER) "." __stringify(VER_BUILD)
+
+#define HECI_DRIVER_VERSION HECI_DRV_VER1 "." HECI_DRV_VER2
+
+#endif
diff --git a/drivers/char/heci/interrupt.c b/drivers/char/heci/interrupt.c
new file mode 100644
index 0000000..aacd262
--- /dev/null
+++ b/drivers/char/heci/interrupt.c
@@ -0,0 +1,1553 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/kthread.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+
+/*
+ * interrupt function prototypes
+ */
+static void heci_bh_handler(struct work_struct *work);
+static int heci_bh_read_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static int heci_bh_write_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *connect_res);
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *disconnect_res);
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control);
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req);
+
+
+/**
+ * heci_isr_interrupt - The ISR of the HECI device
+ *
+ * @irq: The irq number
+ * @dev_id: pointer to the device structure
+ *
+ * returns irqreturn_t
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id)
+{
+ int err;
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) dev_id;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+
+ if ((dev->host_hw_state & H_IS) != H_IS)
+ return IRQ_NONE;
+
+ /* disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ /*
+ * Our device interrupted, schedule work the heci_bh_handler
+ * to handle the interrupt processing. This needs to be a
+ * workqueue item since the handler can sleep.
+ */
+ PREPARE_WORK(&dev->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler.\n");
+ err = schedule_work(&dev->work);
+ if (!err) {
+ printk(KERN_ERR "heci: schedule the heci_bh_handler"
+ " failed error=%x\n", err);
+ }
+ return IRQ_HANDLED;
+}
+
+/**
+ * _heci_cmpl - process completed operation.
+ *
+ * @file_ext: private data of the file object.
+ * @priv_cb_pos: callback block.
+ */
+static void _heci_cmpl(struct heci_file_private *file_ext,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (priv_cb_pos->major_file_operations == HECI_WRITE) {
+ heci_free_cb_private(priv_cb_pos);
+ DBG("completing write call back.\n");
+ file_ext->writing_state = HECI_WRITE_COMPLETE;
+ if ((&file_ext->tx_wait) &&
+ waitqueue_active(&file_ext->tx_wait))
+ wake_up_interruptible(&file_ext->tx_wait);
+
+ } else if (priv_cb_pos->major_file_operations == HECI_READ
+ && HECI_READING == file_ext->reading_state) {
+ DBG("completing read call back information= %lu\n",
+ priv_cb_pos->information);
+ file_ext->reading_state = HECI_READ_COMPLETE;
+ if ((&file_ext->rx_wait) &&
+ waitqueue_active(&file_ext->rx_wait))
+ wake_up_interruptible(&file_ext->rx_wait);
+
+ }
+}
+
+/**
+ * _heci_cmpl_iamthif - process completed iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @priv_cb_pos: callback block.
+ */
+static void _heci_cmpl_iamthif(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (dev->iamthif_canceled != 1) {
+ dev->iamthif_state = HECI_IAMTHIF_READ_COMPLETE;
+ dev->iamthif_stall_timer = 0;
+ memcpy(priv_cb_pos->response_buffer.data,
+ dev->iamthif_msg_buf,
+ dev->iamthif_msg_buf_index);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->pthi_read_complete_list.heci_cb.cb_list);
+ DBG("pthi read completed.\n");
+ } else {
+ run_next_iamthif_cmd(dev);
+ }
+ if (&dev->iamthif_file_ext.wait) {
+ DBG("completing pthi call back.\n");
+ wake_up_interruptible(&dev->iamthif_file_ext.wait);
+ }
+}
+/**
+ * heci_bh_handler - function called after ISR to handle the interrupt
+ * processing.
+ *
+ * @work: pointer to the work structure
+ *
+ * NOTE: This function is called by schedule work
+ */
+static void heci_bh_handler(struct work_struct *work)
+{
+ struct iamt_heci_device *dev =
+ container_of(work, struct iamt_heci_device, work);
+ struct io_heci_list complete_list;
+ __s32 slots;
+ int rets;
+ struct heci_cb_private *cb_pos = NULL, *cb_next = NULL;
+ struct heci_file_private *file_ext;
+ int bus_message_received = 0;
+ struct task_struct *tsk;
+
+ DBG("function called after ISR to handle the interrupt processing.\n");
+ /* initialize our complete list */
+ spin_lock_bh(&dev->device_lock);
+ heci_initialize_list(&complete_list, dev);
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ /* check if ME wants a reset */
+ if (((dev->me_hw_state & ME_RDY_HRA) == 0)
+ && (dev->heci_state != HECI_RESETING)
+ && (dev->heci_state != HECI_INITIALIZING)) {
+ DBG("FW not ready.\n");
+ heci_reset(dev, 1);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ /* check if we need to start the dev */
+ if ((dev->host_hw_state & H_RDY) == 0) {
+ if ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA) {
+ DBG("we need to start the dev.\n");
+ dev->host_hw_state |= (H_IE | H_IG | H_RDY);
+ heci_set_csr_register(dev);
+ if (dev->heci_state == HECI_INITIALIZING) {
+ dev->recvd_msg = 1;
+ spin_unlock_bh(&dev->device_lock);
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ return;
+
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ tsk = kthread_run(heci_task_initialize_clients,
+ dev, "heci_reinit");
+ if (IS_ERR(tsk)) {
+ int rc = PTR_ERR(tsk);
+ printk(KERN_WARNING "heci: Unable to"
+ "start the heci thread: %d\n", rc);
+ }
+ return;
+ }
+ } else {
+ DBG("enable interrupt FW not ready.\n");
+ heci_csr_enable_interrupts(dev);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ }
+ /* check slots avalable for reading */
+ slots = count_full_read_slots(dev);
+ DBG("slots =%08x extra_write_index =%08x.\n",
+ slots, dev->extra_write_index);
+ while ((slots > 0) && (!dev->extra_write_index)) {
+ DBG("slots =%08x extra_write_index =%08x.\n", slots,
+ dev->extra_write_index);
+ DBG("call heci_bh_read_handler.\n");
+ rets = heci_bh_read_handler(&complete_list, dev, &slots);
+ if (rets != 0)
+ goto end;
+ }
+ rets = heci_bh_write_handler(&complete_list, dev, &slots);
+end:
+ DBG("end of bottom half function.\n");
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ /* acknowledge interrupt and disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ PREPARE_WORK(&dev->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler.\n");
+ rets = schedule_work(&dev->work);
+ if (!rets) {
+ printk(KERN_ERR "heci: schedule the heci_bh_handler"
+ " failed error=%x\n", rets);
+ }
+ } else {
+ heci_csr_enable_interrupts(dev);
+ }
+
+ if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) {
+ DBG("received waiting bus message\n");
+ bus_message_received = 1;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ if (bus_message_received) {
+ DBG("wake up dev->wait_recvd_msg\n");
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ bus_message_received = 0;
+ }
+ if ((complete_list.status != 0)
+ || list_empty(&complete_list.heci_cb.cb_list))
+ return;
+
+
+ list_for_each_entry_safe(cb_pos, cb_next,
+ &complete_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)cb_pos->file_private;
+ list_del(&cb_pos->cb_list);
+ if (file_ext != NULL) {
+ if (file_ext != &dev->iamthif_file_ext) {
+ DBG("completing call back.\n");
+ _heci_cmpl(file_ext, cb_pos);
+ cb_pos = NULL;
+ } else if (file_ext == &dev->iamthif_file_ext) {
+ _heci_cmpl_iamthif(dev, cb_pos);
+ }
+ }
+ }
+}
+
+
+/**
+ * heci_bh_read_handler - bottom half read routine after ISR to
+ * handle the read processing.
+ *
+ * @cmpl_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @slots: slots to read.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+ struct heci_msg_hdr *heci_hdr;
+ int ret = 0;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (!dev->rd_msg_hdr) {
+ dev->rd_msg_hdr = read_heci_register(dev, ME_CB_RW);
+ DBG("slots=%08x.\n", *slots);
+ (*slots)--;
+ DBG("slots=%08x.\n", *slots);
+ }
+ heci_hdr = (struct heci_msg_hdr *) &dev->rd_msg_hdr;
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+
+ if ((heci_hdr->reserved) || !(dev->rd_msg_hdr)) {
+ DBG("corrupted message header.\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+
+ if ((heci_hdr->host_addr) || (heci_hdr->me_addr)) {
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe read host"
+ " client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ if ((file_pos->host_client_id == heci_hdr->host_addr)
+ && (file_pos->me_client_id == heci_hdr->me_addr))
+ break;
+ }
+
+ if (&file_pos->link == &dev->file_list) {
+ DBG("corrupted message header\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+ }
+ if (((*slots) * sizeof(__u32)) < heci_hdr->length) {
+ DBG("we can't read the message slots=%08x.\n", *slots);
+ /* we can't read the message */
+ ret = -ERANGE;
+ goto end;
+ }
+
+ /* decide where to read the message too */
+ if (!heci_hdr->host_addr) {
+ DBG("call heci_bh_read_bus_message.\n");
+ heci_bh_read_bus_message(dev, heci_hdr);
+ DBG("end heci_bh_read_bus_message.\n");
+ } else if ((heci_hdr->host_addr == dev->iamthif_file_ext.host_client_id)
+ && (HECI_FILE_CONNECTED == dev->iamthif_file_ext.state)
+ && (dev->iamthif_state == HECI_IAMTHIF_READING)) {
+ DBG("call heci_bh_read_iamthif_message.\n");
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ ret = heci_bh_read_pthi_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ } else {
+ DBG("call heci_bh_read_client_message.\n");
+ ret = heci_bh_read_client_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ }
+
+ /* reset the number of slots and header */
+ *slots = count_full_read_slots(dev);
+ dev->rd_msg_hdr = 0;
+
+ if (*slots == -ESLOTS_OVERFLOW) {
+ /* overflow - reset */
+ DBG("reseting due to slots overflow.\n");
+ /* set the event since message has been read */
+ ret = -ERANGE;
+ goto end;
+ }
+end:
+ return ret;
+}
+
+
+/**
+ * heci_bh_read_bus_message - bottom half read routine after ISR to
+ * handle the read bus message cmd processing.
+ *
+ * @dev: Device object for our driver
+ * @heci_hdr: header of bus message
+ */
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_bus_message *heci_msg;
+ struct hbm_host_version_response *version_res;
+ struct hbm_client_connect_response *connect_res;
+ struct hbm_client_connect_response *disconnect_res;
+ struct hbm_flow_control *flow_control;
+ struct hbm_props_response *props_res;
+ struct hbm_host_enum_response *enum_res;
+ struct hbm_client_disconnect_request *disconnect_req;
+ struct hbm_host_stop_request *h_stop_req;
+ int i;
+ unsigned char *buffer;
+
+ /* read the message to our buffer */
+ buffer = (unsigned char *) dev->rd_msg_buf;
+ BUG_ON(heci_hdr->length >= sizeof(dev->rd_msg_buf));
+ heci_read_slots(dev, buffer, heci_hdr->length);
+ heci_msg = (struct heci_bus_message *) buffer;
+
+ switch (*(__u8 *) heci_msg) {
+ case HOST_START_RES_CMD:
+ version_res = (struct hbm_host_version_response *) heci_msg;
+ if (version_res->host_version_supported) {
+ dev->version.major_version = HBM_MAJOR_VERSION;
+ dev->version.minor_version = HBM_MINOR_VERSION;
+ } else {
+ dev->version = version_res->me_max_version;
+ }
+ dev->recvd_msg = 1;
+ DBG("host start response message received.\n");
+ break;
+
+ case CLIENT_CONNECT_RES_CMD:
+ connect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_connect_response(dev, connect_res);
+ DBG("client connect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case CLIENT_DISCONNECT_RES_CMD:
+ disconnect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_disconnect_response(dev, disconnect_res);
+ DBG("client disconnect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case HECI_FLOW_CONTROL_CMD:
+ flow_control = (struct hbm_flow_control *) heci_msg;
+ heci_client_flow_control_response(dev, flow_control);
+ DBG("client flow control response message received.\n");
+ break;
+
+ case HOST_CLIENT_PROPERTEIS_RES_CMD:
+ props_res = (struct hbm_props_response *) heci_msg;
+ if (props_res->status != 0) {
+ BUG();
+ break;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ props_res->address) {
+ dev->me_clients[i].props =
+ props_res->client_properties;
+ break;
+ }
+
+ }
+ dev->recvd_msg = 1;
+ break;
+
+ case HOST_ENUM_RES_CMD:
+ enum_res = (struct hbm_host_enum_response *) heci_msg;
+ memcpy(dev->heci_me_clients, enum_res->valid_addresses, 32);
+ dev->recvd_msg = 1;
+ break;
+
+ case HOST_STOP_RES_CMD:
+ dev->heci_state = HECI_DISABLED;
+ DBG("reseting because of FW stop response.\n");
+ heci_reset(dev, 1);
+ break;
+
+ case CLIENT_DISCONNECT_REQ_CMD:
+ /* search for client */
+ disconnect_req =
+ (struct hbm_client_disconnect_request *) heci_msg;
+ heci_client_disconnect_request(dev, disconnect_req);
+ break;
+
+ case ME_STOP_REQ_CMD:
+ /* prepare stop request */
+ heci_hdr = (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ h_stop_req =
+ (struct hbm_host_stop_request *) &dev->ext_msg_buf[1];
+ memset(h_stop_req, 0, sizeof(struct hbm_host_stop_request));
+ h_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ h_stop_req->reason = DRIVER_STOP_REQUEST;
+ h_stop_req->reserved[0] = 0;
+ h_stop_req->reserved[1] = 0;
+ dev->extra_write_index = 2;
+ break;
+
+ default:
+ BUG();
+ break;
+
+ }
+}
+
+/**
+ * heci_bh_read_pthi_message - bottom half read routine after ISR to
+ * handle the read pthi message data processing.
+ *
+ * @complete_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @heci_hdr: header of pthi message
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb;
+ unsigned char *buffer;
+
+ BUG_ON(heci_hdr->me_addr != dev->iamthif_file_ext.me_client_id);
+ BUG_ON(dev->iamthif_state != HECI_IAMTHIF_READING);
+
+ buffer = (unsigned char *) (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index);
+ BUG_ON(sizeof(dev->iamthif_msg_buf) <
+ (dev->iamthif_msg_buf_index + heci_hdr->length));
+
+ heci_read_slots(dev, buffer, heci_hdr->length);
+
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+
+ if (!(heci_hdr->msg_complete))
+ return 0;
+
+ DBG("pthi_message_buffer_index=%d\n", heci_hdr->length);
+ DBG("completed pthi read.\n ");
+ if (!dev->iamthif_current_cb)
+ return -ENODEV;
+
+ priv_cb = dev->iamthif_current_cb;
+ dev->iamthif_current_cb = NULL;
+
+ file_ext = (struct heci_file_private *)priv_cb->file_private;
+ if (!file_ext)
+ return -ENODEV;
+
+ dev->iamthif_stall_timer = 0;
+ priv_cb->information = dev->iamthif_msg_buf_index;
+ priv_cb->read_time = get_seconds();
+ if ((dev->iamthif_ioctl) && (file_ext == &dev->iamthif_file_ext)) {
+ /* found the iamthif cb */
+ DBG("complete the pthi read cb.\n ");
+ if (&dev->iamthif_file_ext) {
+ DBG("add the pthi read cb to complete.\n ");
+ list_add_tail(&priv_cb->cb_list,
+ &complete_list->heci_cb.cb_list);
+ }
+ }
+ return 0;
+}
+
+/**
+ * _heci_bh_state_ok - check if heci header matches file private data
+ *
+ * @file_ext: private data of the file object
+ * @heci_hdr: header of heci client message
+ *
+ * returns !=0 if matches, 0 if no match.
+ */
+static int _heci_bh_state_ok(struct heci_file_private *file_ext,
+ struct heci_msg_hdr *heci_hdr)
+{
+ return ((file_ext->host_client_id == heci_hdr->host_addr)
+ && (file_ext->me_client_id == heci_hdr->me_addr)
+ && (file_ext->state == HECI_FILE_CONNECTED)
+ && (HECI_READ_COMPLETE != file_ext->reading_state));
+}
+
+/**
+ * heci_bh_read_client_message - bottom half read routine after ISR to
+ * handle the read heci client message data processing.
+ *
+ * @complete_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @heci_hdr: header of heci client message
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ unsigned char *buffer = NULL;
+
+ DBG("start client msg\n");
+ if (!((dev->read_list.status == 0) &&
+ !list_empty(&dev->read_list.heci_cb.cb_list)))
+ goto quit;
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if ((file_ext != NULL) &&
+ (_heci_bh_state_ok(file_ext, heci_hdr))) {
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_READING;
+ buffer = (unsigned char *)
+ (priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information);
+ BUG_ON(priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information);
+
+ if (priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information) {
+ DBG("message overflow.\n");
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENOMEM;
+ }
+ if (buffer) {
+ heci_read_slots(dev, buffer,
+ heci_hdr->length);
+ }
+ priv_cb_pos->information += heci_hdr->length;
+ if (heci_hdr->msg_complete) {
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ DBG("completed read host client = %d,"
+ "ME client = %d, "
+ "data length = %lu\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id,
+ priv_cb_pos->information);
+
+ *(priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information) = '\0';
+ DBG("priv_cb_pos->res_buffer - %s\n",
+ priv_cb_pos->response_buffer.data);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &complete_list->heci_cb.cb_list);
+ } else {
+ spin_unlock(&file_ext->read_io_lock);
+ }
+
+ break;
+ }
+
+ }
+
+quit:
+ DBG("message read\n");
+ if (!buffer) {
+ heci_read_slots(dev, (unsigned char *) dev->rd_msg_buf,
+ heci_hdr->length);
+ DBG("discarding message, header=%08x.\n",
+ *(__u32 *) dev->rd_msg_buf);
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_iamthif_read - prepare to read iamthif data.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_iamthif_read(struct iamt_heci_device *dev, __s32 *slots)
+{
+
+ if (((*slots) * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr)
+ + sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, &dev->iamthif_file_ext)) {
+ DBG("iamthif flow control failed\n");
+ } else {
+ DBG("iamthif flow control success\n");
+ dev->iamthif_state = HECI_IAMTHIF_READING;
+ dev->iamthif_flow_control_pending = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_stall_timer = IAMTHIF_STALL_TIMER;
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+ }
+ return 0;
+ } else {
+ return -ECOMPLETE_MESSAGE;
+ }
+}
+
+/**
+ * _heci_bh_close - process close related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_close(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request) + 3) / 4;
+
+ if (!heci_disconnect(dev, file_ext)) {
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_hb_close - process read related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_read(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+
+/**
+ * _heci_bh_ioctl - process ioctl related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_ioctl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request))) {
+ file_ext->state = HECI_FILE_CONNECTING;
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request) + 3) / 4;
+ if (!heci_connect(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl - process completed and no-iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ (priv_cb_pos->request_buffer.size -
+ priv_cb_pos->information))) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = ((priv_cb_pos->request_buffer.size) -
+ (priv_cb_pos->information));
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ "heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n",
+ heci_hdr->length);
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ file_ext->status = 0;
+ priv_cb_pos->information += heci_hdr->length;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ (*slots) -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ priv_cb_pos->information += heci_hdr->length;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ " heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl_iamthif - process completed iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl_iamthif(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ dev->iamthif_msg_buf_size -
+ dev->iamthif_msg_buf_index)) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = dev->iamthif_msg_buf_size -
+ dev->iamthif_msg_buf_index;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index),
+ heci_hdr->length)) {
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+ priv_cb_pos->information = dev->iamthif_msg_buf_index;
+ file_ext->status = 0;
+ dev->iamthif_state = HECI_IAMTHIF_FLOW_CONTROL;
+ dev->iamthif_flow_control_pending = 1;
+ /* save iamthif cb sent to pthi client */
+ dev->iamthif_current_cb = priv_cb_pos;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ } else {
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * heci_bh_write_handler - bottom half write routine after
+ * ISR to handle the write processing.
+ *
+ * @cmpl_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @slots: slots to write.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_write_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ struct io_heci_list *list;
+ int ret;
+
+ if (!host_buffer_is_empty(dev)) {
+ DBG("host buffer is not empty.\n");
+ return 0;
+ }
+ dev->write_hang = -1;
+ *slots = count_empty_write_slots(dev);
+ /* complete all waiting for write CB */
+ DBG("complete all waiting for write cb.\n");
+
+ list = &dev->write_waiting_list;
+ if ((list->status == 0)
+ && !list_empty(&list->heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &list->heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext != NULL) {
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ if ((HECI_WRITING == file_ext->writing_state) &&
+ (priv_cb_pos->major_file_operations ==
+ HECI_WRITING) &&
+ (file_ext != &dev->iamthif_file_ext)) {
+ DBG("HECI WRITE COMPLETE\n");
+ file_ext->writing_state =
+ HECI_WRITE_COMPLETE;
+ list_add_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ }
+ if (file_ext == &dev->iamthif_file_ext) {
+ DBG("check iamthif flow control.\n");
+ if (dev->iamthif_flow_control_pending) {
+ ret = _heci_bh_iamthif_read(dev,
+ slots);
+ if (ret != 0)
+ return ret;
+ }
+ }
+ }
+
+ }
+ }
+
+ if ((dev->stop) && (!dev->wd_pending)) {
+ dev->wd_stoped = 1;
+ wake_up_interruptible(&dev->wait_stop_wd);
+ return 0;
+ }
+
+ if (dev->extra_write_index != 0) {
+ DBG("extra_write_index =%d.\n", dev->extra_write_index);
+ heci_write_message(dev,
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0],
+ (unsigned char *) &dev->ext_msg_buf[1],
+ (dev->extra_write_index - 1) * sizeof(__u32));
+ *slots -= dev->extra_write_index;
+ dev->extra_write_index = 0;
+ }
+ if (dev->heci_state == HECI_ENABLED) {
+ if ((dev->wd_pending)
+ && flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ if (!heci_send_wd(dev))
+ DBG("wd send failed.\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+
+ if (dev->wd_timeout != 0) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_START_WD_DATA_SIZE + 3) / 4;
+ dev->wd_due_counter = 2;
+ } else {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_WD_PARAMS_SIZE + 3) / 4;
+ dev->wd_due_counter = 0;
+ }
+
+ }
+ }
+ if (dev->stop)
+ return ~ENODEV;
+
+ /* complete control write list CB */
+ if (dev->ctrl_wr_list.status == 0) {
+ /* complete control write list CB */
+ DBG("complete control write list cb.\n");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_wr_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ }
+ switch (priv_cb_pos->major_file_operations) {
+ case HECI_CLOSE:
+ /* send disconnect message */
+ ret = _heci_bh_close(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_READ:
+ /* send flow control message */
+ ret = _heci_bh_read(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_IOCTL:
+ /* connect message */
+ if (!other_client_is_connecting(dev, file_ext))
+ continue;
+ ret = _heci_bh_ioctl(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+
+ default:
+ BUG();
+ }
+
+ }
+ }
+ /* complete write list CB */
+ if ((dev->write_list.status == 0)
+ && !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ DBG("complete write list cb.\n");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (file_ext != NULL) {
+ if (file_ext != &dev->iamthif_file_ext) {
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control"
+ " credentials for client"
+ " %d, not sending.\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl(dev, slots,
+ priv_cb_pos,
+ file_ext,
+ cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ } else if (file_ext == &dev->iamthif_file_ext) {
+ /* IAMTHIF IOCTL */
+ DBG("complete pthi write cb.\n");
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control"
+ " credentials for pthi"
+ " client %d.\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl_iamthif(dev, slots,
+ priv_cb_pos,
+ file_ext,
+ cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ }
+ }
+
+ }
+ }
+ return 0;
+}
+
+
+/**
+ * is_treat_specially_client - check if the message belong
+ * to the file private data.
+ *
+ * @file_ext: private data of the file object
+ * @rs: connect response bus message
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int is_treat_specially_client(struct heci_file_private *file_ext,
+ struct hbm_client_connect_response *rs)
+{
+ int ret = 0;
+
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+ if (rs->status == 0) {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_CONNECTED;
+ file_ext->status = 0;
+ } else {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_DISCONNECTED;
+ file_ext->status = -ENODEV;
+ }
+ ret = 1;
+ }
+ DBG("client state = %d.\n", file_ext->state);
+ return ret;
+}
+
+/**
+ * heci_client_connect_response - connect response bh routine
+ *
+ * @dev: Device object for our driver
+ * @rs: connect response bus message
+ */
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ /* if WD or iamthif client treat specially */
+
+ if ((is_treat_specially_client(&(dev->wd_file_ext), rs)) ||
+ (is_treat_specially_client(&(dev->iamthif_file_ext), rs)))
+ return;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+ if (HECI_IOCTL == priv_cb_pos->major_file_operations) {
+ if (is_treat_specially_client(file_ext, rs)) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+ }
+}
+
+/**
+ * heci_client_disconnect_response - disconnect response bh routine
+ *
+ * @dev: Device object for our driver
+ * @rs: disconnect response bus message
+ */
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+
+ DBG("list_for_each_entry_safe in ctrl_rd_list.\n");
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+
+ list_del(&priv_cb_pos->cb_list);
+ if (rs->status == 0) {
+ file_ext->state =
+ HECI_FILE_DISCONNECTED;
+ }
+
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_flow_addr - tell they have same address.
+ *
+ * @file: private data of the file object.
+ * @flow: flow control.
+ *
+ * returns !=0, same; 0,not.
+ */
+static int same_flow_addr(struct heci_file_private *file,
+ struct hbm_flow_control *flow)
+{
+ return ((file->host_client_id == flow->host_addr)
+ && (file->me_client_id == flow->me_addr));
+}
+
+/**
+ * add_single_flow_creds - add single buffer credentials.
+ *
+ * @file: private data ot the file object.
+ * @flow: flow control.
+ */
+static void add_single_flow_creds(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow)
+{
+ struct heci_me_client *client;
+ int i;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ client = &dev->me_clients[i];
+ if ((client != NULL) &&
+ (flow->me_addr == client->client_id)) {
+ if (client->props.single_recv_buf != 0) {
+ client->flow_ctrl_creds++;
+ DBG("recv flow ctrl msg ME %d (single).\n",
+ flow->me_addr);
+ DBG("flow control credentials=%d.\n",
+ client->flow_ctrl_creds);
+ } else {
+ BUG(); /* error in flow control */
+ }
+ }
+ }
+}
+
+/**
+ * heci_client_flow_control_response - flow control response bh routine
+ *
+ * @dev: Device object for our driver
+ * @flow_control: flow control response bus message
+ */
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (flow_control->host_addr == 0) {
+ /* single receive buffer */
+ add_single_flow_creds(dev, flow_control);
+ } else {
+ /* normal connection */
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe in file_list\n");
+
+ DBG("file_ext of host client %d ME client %d.\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ DBG("flow ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ if (same_flow_addr(file_pos, flow_control)) {
+ DBG("recv ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ file_pos->flow_ctrl_creds++;
+ DBG("flow control credentials=%d.\n",
+ file_pos->flow_ctrl_creds);
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_disconn_addr - tell they have same address
+ *
+ * @file: private data of the file object.
+ * @disconn: disconnection request.
+ *
+ * returns !=0, same; 0,not.
+ */
+static int same_disconn_addr(struct heci_file_private *file,
+ struct hbm_client_disconnect_request *disconn)
+{
+ return ((file->host_client_id == disconn->host_addr)
+ && (file->me_client_id == disconn->me_addr));
+}
+
+/**
+ * heci_client_disconnect_request - disconnect request bh routine
+ *
+ * @dev: Device object for our driver.
+ * @disconnect_req: disconnect request bus message.
+ */
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_response *disconnect_res;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (same_disconn_addr(file_pos, disconnect_req)) {
+ DBG("disconnect request host client %d ME client %d.\n",
+ disconnect_req->host_addr,
+ disconnect_req->me_addr);
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->timer_count = 0;
+ if (file_pos == &dev->wd_file_ext) {
+ dev->wd_due_counter = 0;
+ dev->wd_pending = 0;
+ } else if (file_pos == &dev->iamthif_file_ext)
+ dev->iamthif_timer = 0;
+
+ /* prepare disconnect response */
+ heci_hdr =
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length =
+ sizeof(struct hbm_client_connect_response);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ disconnect_res =
+ (struct hbm_client_connect_response *)
+ &dev->ext_msg_buf[1];
+ disconnect_res->host_addr = file_pos->host_client_id;
+ disconnect_res->me_addr = file_pos->me_client_id;
+ *(__u8 *) (&disconnect_res->cmd) =
+ CLIENT_DISCONNECT_RES_CMD;
+ disconnect_res->status = 0;
+ dev->extra_write_index = 2;
+ break;
+ }
+ }
+}
+
+/**
+ * heci_timer - timer function.
+ *
+ * @data: pointer to the device structure
+ *
+ * NOTE: This function is called by timer interrupt work
+ */
+void heci_wd_timer(unsigned long data)
+{
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ DBG("send watchdog.\n");
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ /* Watchdog */
+ if ((dev->wd_due_counter != 0) && (dev->wd_bypass == 0)) {
+ if (--dev->wd_due_counter == 0) {
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_wd(dev)) {
+ DBG("wd send failed.\n");
+ } else {
+ flow_ctrl_reduce(dev,
+ &dev->wd_file_ext);
+ }
+
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 2;
+ else
+ dev->wd_due_counter = 0;
+
+ } else
+ dev->wd_pending = 1;
+
+ }
+ }
+ if (dev->iamthif_stall_timer != 0) {
+ if (--dev->iamthif_stall_timer == 0) {
+ DBG("reseting because of hang to PTHI.\n");
+ heci_reset(dev, 1);
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->iamthif_current_cb)
+ heci_free_cb_private(dev->iamthif_current_cb);
+
+ spin_lock_bh(&dev->device_lock);
+ dev->iamthif_file_object = NULL;
+ dev->iamthif_current_cb = NULL;
+ run_next_iamthif_cmd(dev);
+ }
+ }
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+}
diff --git a/drivers/char/heci/io_heci.c b/drivers/char/heci/io_heci.c
new file mode 100644
index 0000000..aa6d1cd
--- /dev/null
+++ b/drivers/char/heci/io_heci.c
@@ -0,0 +1,847 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/list.h>
+#include <linux/unistd.h>
+#include <linux/delay.h>
+
+#include "heci_data_structures.h"
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+/**
+ * heci_ioctl_get_version - the get driver version IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @*u_msg: pointer to user data struct in user space
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ struct heci_driver_version *version;
+ struct heci_message_data res_msg;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev)
+ || (!file_ext))
+ return -ENODEV;
+
+ if (k_msg.size < (sizeof(struct heci_driver_version) - 2)) {
+ DBG("user buffer less than heci_driver_version.\n");
+ return -EMSGSIZE;
+ }
+
+ res_msg.data = kmalloc(sizeof(struct heci_driver_version), GFP_KERNEL);
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_driver_version));
+ return -ENOMEM;
+ }
+
+ version = (struct heci_driver_version *) res_msg.data;
+ version->major = MAJOR_VERSION;
+ version->minor = MINOR_VERSION;
+ version->hotfix = QUICK_FIX_NUMBER;
+ version->build = VER_BUILD;
+ res_msg.size = sizeof(struct heci_driver_version);
+ if (k_msg.size < sizeof(struct heci_driver_version))
+ res_msg.size -= 2;
+
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+end:
+ kfree(res_msg.data);
+ return rets;
+}
+
+/**
+ * heci_ioctl_connect_client - the connect to fw client IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @*u_msg: pointer to user data struct in user space
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file)
+{
+ int rets = 0;
+ struct heci_message_data req_msg, res_msg;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_client *client;
+ struct heci_file_private *file_ext;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ long timeout = 15; /*15 second */
+ __u8 i;
+ int err = 0;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file))
+ return -ENODEV;
+
+ file_ext = file->private_data;
+ if (!file_ext)
+ return -ENODEV;
+
+ if (k_msg.size != sizeof(struct guid)) {
+ DBG("user buffer size is not equal to size of struct "
+ "guid(16).\n");
+ return -EMSGSIZE;
+ }
+
+ if (!k_msg.data)
+ return -EIO;
+
+ req_msg.data = kmalloc(sizeof(struct guid), GFP_KERNEL);
+ res_msg.data = kmalloc(sizeof(struct heci_client), GFP_KERNEL);
+
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_client));
+ kfree(req_msg.data);
+ return -ENOMEM;
+ }
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ (int) sizeof(struct guid));
+ kfree(res_msg.data);
+ return -ENOMEM;
+ }
+ req_msg.size = sizeof(struct guid);
+ res_msg.size = sizeof(struct heci_client);
+
+ /* copy the message to kernel space -
+ * use a pointer already copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, k_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ /* buffered ioctl cb */
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb) {
+ rets = -ENOMEM;
+ goto end;
+ }
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->response_buffer.data = res_msg.data;
+ priv_cb->response_buffer.size = res_msg.size;
+ priv_cb->request_buffer.data = req_msg.data;
+ priv_cb->request_buffer.size = req_msg.size;
+ priv_cb->major_file_operations = HECI_IOCTL;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if ((file_ext->state != HECI_FILE_INITIALIZING) &&
+ (file_ext->state != HECI_FILE_DISCONNECTED)) {
+ rets = -EBUSY;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ /* find ME client we're trying to connect to */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp((struct guid *)req_msg.data,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (dev->me_clients[i].props.fixed_address == 0) {
+ file_ext->me_client_id =
+ dev->me_clients[i].client_id;
+ file_ext->state = HECI_FILE_CONNECTING;
+ }
+ break;
+ }
+ }
+ /* if we're connecting to PTHI client so we will use the exist
+ * connection
+ */
+ if (memcmp((struct guid *)req_msg.data, &heci_pthi_guid,
+ sizeof(struct guid)) == 0) {
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ if (heci_fe_same_id(file_ext, file_pos)) {
+ DBG("remove file private data node host"
+ " client = %d, ME client = %d.\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del(&file_pos->link);
+ }
+
+ }
+ DBG("free file private data memory.\n");
+ kfree(file_ext);
+ file_ext = NULL;
+ file->private_data = &dev->iamthif_file_ext;
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length =
+ dev->me_clients[i].props.max_msg_length;
+ client->protocol_version =
+ dev->me_clients[i].props.protocol_version;
+ rets = dev->iamthif_file_ext.status;
+ spin_unlock_bh(&dev->device_lock);
+
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ }
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state != HECI_FILE_CONNECTING) {
+ rets = -ENODEV;
+ spin_unlock(&file_ext->file_lock);
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ spin_unlock(&file_ext->file_lock);
+ /* prepare the output buffer */
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length = dev->me_clients[i].props.max_msg_length;
+ client->protocol_version = dev->me_clients[i].props.protocol_version;
+ if (dev->host_buffer_is_empty
+ && !other_client_is_connecting(dev, file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_connect(dev, file_ext)) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ } else {
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ priv_cb->file_private = file_ext;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.
+ cb_list);
+ }
+
+
+ } else {
+ priv_cb->file_private = file_ext;
+ DBG("add connect cb to control write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+
+ if (HECI_FILE_CONNECTED == file_ext->state) {
+ DBG("successfully connected to FW client.\n");
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ } else {
+ DBG("failed to connect to FW client.file_ext->state = %d.\n",
+ file_ext->state);
+ if (!err) {
+ DBG("wait_event_interruptible_timeout failed on client"
+ " connect message fw response message.\n");
+ }
+ rets = -EFAULT;
+ goto remove_list;
+ }
+
+remove_list:
+ if (priv_cb) {
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_list(&dev->ctrl_rd_list, file_ext);
+ heci_flush_list(&dev->ctrl_wr_list, file_ext);
+ spin_unlock_bh(&dev->device_lock);
+ }
+end:
+ DBG("free connect cb memory.");
+ kfree(req_msg.data);
+ kfree(res_msg.data);
+ kfree(priv_cb);
+ return rets;
+}
+
+/**
+ * heci_ioctl_wd - the wd IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ struct heci_message_data req_msg; /*in kernel on the stack */
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size != HECI_WATCHDOG_DATA_SIZE) {
+ DBG("user buffer has invalid size.\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+
+ req_msg.data = kmalloc(HECI_WATCHDOG_DATA_SIZE, GFP_KERNEL);
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ HECI_WATCHDOG_DATA_SIZE);
+ return -ENOMEM;
+ }
+ req_msg.size = HECI_WATCHDOG_DATA_SIZE;
+
+ /* copy the message to kernel space - use a pointer already
+ * copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, req_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if (!dev->asf_mode) {
+ rets = -EIO;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ memcpy(&dev->wd_data[HECI_WD_PARAMS_SIZE], req_msg.data,
+ HECI_WATCHDOG_DATA_SIZE);
+
+ dev->wd_timeout = (req_msg.data[1] << 8) + req_msg.data[0];
+ dev->wd_pending = 0;
+ dev->wd_due_counter = 1; /* next timer */
+ if (dev->wd_timeout == 0) {
+ memcpy(dev->wd_data, &heci_stop_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ } else {
+ memcpy(dev->wd_data, &heci_start_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ mod_timer(&dev->wd_timer, jiffies);
+ }
+ spin_unlock_bh(&dev->device_lock);
+end:
+ kfree(req_msg.data);
+ return rets;
+}
+
+
+/**
+ * heci_ioctl_bypass_wd - the bypass_wd IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_bypass_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ __u8 flag = 0;
+ int rets = 0;
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size < 1) {
+ DBG("user buffer less than HECI_WATCHDOG_DATA_SIZE.\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+ if (copy_from_user(&flag, k_msg.data, 1)) {
+ rets = -EFAULT;
+ goto end;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ flag = flag ? (1) : (0);
+ dev->wd_bypass = flag;
+ spin_unlock_bh(&dev->device_lock);
+end:
+ return rets;
+}
+
+/**
+ * find_pthi_read_list_entry - finds a PTHIlist entry for current file
+ *
+ * @dev: Device object for our driver
+ * @file: pointer to file object
+ *
+ * returns returned a list entry on success, NULL on failure.
+ */
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct file *file)
+{
+ struct heci_file_private *file_ext_temp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if ((dev->pthi_read_complete_list.status == 0) &&
+ !list_empty(&dev->pthi_read_complete_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_read_complete_list.heci_cb.cb_list, cb_list) {
+ file_ext_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if ((file_ext_temp != NULL) &&
+ (file_ext_temp == &dev->iamthif_file_ext) &&
+ (priv_cb_pos->file_object == file))
+ return priv_cb_pos;
+ }
+ }
+ return NULL;
+}
+
+/**
+ * pthi_read - read data from pthi client
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @file: pointer to file object
+ * @*ubuf: pointer to user data in user space
+ * @length: data length to read
+ * @offset: data read offset
+ *
+ * returns
+ * returned data length on success,
+ * zero if no data to read,
+ * negative on failure.
+ */
+int pthi_read(struct iamt_heci_device *dev, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset)
+{
+ int rets = 0;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_file_private *file_ext = file->private_data;
+ __u8 i;
+ unsigned long currtime = get_seconds();
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ if ((file_ext == NULL) || (file_ext != &dev->iamthif_file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->iamthif_file_ext.me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients)
+ || (dev->me_clients[i].client_id !=
+ dev->iamthif_file_ext.me_client_id)) {
+ DBG("PTHI client not found.\n");
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ priv_cb = find_pthi_read_list_entry(dev, file);
+ if (!priv_cb) {
+ spin_unlock_bh(&dev->device_lock);
+ return 0; /* No more data to read */
+ } else {
+ if (priv_cb &&
+ (currtime - priv_cb->read_time > IAMTHIF_READ_TIMER)) {
+ /* 15 sec for the message has expired */
+ list_del(&priv_cb->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ETIMEDOUT;
+ goto free;
+ }
+ /* if the whole message will fit remove it from the list */
+ if ((priv_cb->information >= *offset) &&
+ (length >= (priv_cb->information - *offset)))
+ list_del(&priv_cb->cb_list);
+ else if ((priv_cb->information > 0) &&
+ (priv_cb->information <= *offset)) {
+ /* end of the message has been reached */
+ list_del(&priv_cb->cb_list);
+ rets = 0;
+ spin_unlock_bh(&dev->device_lock);
+ goto free;
+ }
+ /* else means that not full buffer will be read and do not
+ * remove message from deletion list
+ */
+ }
+ DBG("pthi priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("pthi priv_cb->information - %lu\n",
+ priv_cb->information);
+ spin_unlock_bh(&dev->device_lock);
+
+ /* length is being turncated to PAGE_SIZE, however,
+ * the information may be longer */
+ length = length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset);
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length))
+ rets = -EFAULT;
+ else {
+ rets = length;
+ if ((*offset + length) < priv_cb->information) {
+ *offset += length;
+ goto out;
+ }
+ }
+free:
+ DBG("free pthi cb memory.\n");
+ *offset = 0;
+ heci_free_cb_private(priv_cb);
+out:
+ return rets;
+}
+
+/**
+ * heci_start_read - the start read client message function.
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_start_read(struct iamt_heci_device *dev, int if_num,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ __u8 i;
+ struct heci_cb_private *priv_cb = NULL;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext)) {
+ DBG("received wrong function input param.\n");
+ return -ENODEV;
+ }
+ if (file_ext->state != HECI_FILE_CONNECTED)
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ DBG("check if read is pending.\n");
+ if ((file_ext->read_pending) || (file_ext->read_cb != NULL)) {
+ DBG("read is pending.\n");
+ return -EBUSY;
+ }
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ DBG("allocation call back success\n"
+ "host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id)
+ break;
+
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if (i == dev->num_heci_me_clients) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+
+ priv_cb->response_buffer.size = dev->me_clients[i].props.max_msg_length;
+ spin_unlock_bh(&dev->device_lock);
+ priv_cb->response_buffer.data =
+ kmalloc(priv_cb->response_buffer.size, GFP_KERNEL);
+ if (!priv_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ DBG("allocation call back data success.\n");
+ priv_cb->major_file_operations = HECI_READ;
+ /* make sure information is zero before we start */
+ priv_cb->information = 0;
+ priv_cb->file_private = (void *) file_ext;
+ file_ext->read_cb = priv_cb;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ rets = -ENODEV;
+ goto unlock;
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+unlock:
+ spin_unlock_bh(&dev->device_lock);
+fail:
+ heci_free_cb_private(priv_cb);
+ return rets;
+}
+
+/**
+ * pthi_write - write iamthif data to pthi client
+ *
+ * @dev: Device object for our driver
+ * @priv_cb: heci call back struct
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int pthi_write(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb)
+{
+ int rets = 0;
+ struct heci_msg_hdr heci_hdr;
+
+ if ((!dev) || (!priv_cb))
+ return -ENODEV;
+
+ DBG("write data to pthi client.\n");
+
+ dev->iamthif_state = HECI_IAMTHIF_WRITING;
+ dev->iamthif_current_cb = priv_cb;
+ dev->iamthif_file_object = priv_cb->file_object;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_msg_buf_size = priv_cb->request_buffer.size;
+ memcpy(dev->iamthif_msg_buf, priv_cb->request_buffer.data,
+ priv_cb->request_buffer.size);
+
+ if (flow_ctrl_creds(dev, &dev->iamthif_file_ext) &&
+ dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (priv_cb->request_buffer.size >
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr)) {
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = priv_cb->request_buffer.size;
+ heci_hdr.msg_complete = 1;
+ }
+
+ heci_hdr.host_addr = dev->iamthif_file_ext.host_client_id;
+ heci_hdr.me_addr = dev->iamthif_file_ext.me_client_id;
+ heci_hdr.reserved = 0;
+ dev->iamthif_msg_buf_index += heci_hdr.length;
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *)(dev->iamthif_msg_buf),
+ heci_hdr.length))
+ return -ENODEV;
+
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, &dev->iamthif_file_ext);
+ dev->iamthif_flow_control_pending = 1;
+ dev->iamthif_state = HECI_IAMTHIF_FLOW_CONTROL;
+ DBG("add pthi cb to write waiting list\n");
+ dev->iamthif_current_cb = priv_cb;
+ dev->iamthif_file_object = priv_cb->file_object;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ DBG("message does not complete, "
+ "so add pthi cb to write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ } else {
+ if (!(dev->host_buffer_is_empty))
+ DBG("host buffer is not empty");
+
+ DBG("No flow control credentials, "
+ "so add iamthif cb to write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return rets;
+}
+
+/**
+ * iamthif_ioctl_send_msg - send cmd data to pthi client
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+void run_next_iamthif_cmd(struct iamt_heci_device *dev)
+{
+ struct heci_file_private *file_ext_tmp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int status = 0;
+
+ if (!dev)
+ return;
+
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+ dev->iamthif_file_object = NULL;
+
+ if (dev->pthi_cmd_list.status == 0 &&
+ !list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)) {
+ DBG("complete pthi cmd_list cb.\n");
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_cmd_list.heci_cb.cb_list, cb_list) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext_tmp != NULL) &&
+ (file_ext_tmp == &dev->iamthif_file_ext)) {
+ status = pthi_write(dev, priv_cb_pos);
+ if (status != 0) {
+ DBG("pthi write failed status = %d\n",
+ status);
+ return;
+ }
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * heci_free_cb_private - free heci_cb_private related memory
+ *
+ * @priv_cb: heci callback struct
+ */
+void heci_free_cb_private(struct heci_cb_private *priv_cb)
+{
+ if (priv_cb == NULL)
+ return;
+
+ kfree(priv_cb->request_buffer.data);
+ kfree(priv_cb->response_buffer.data);
+ kfree(priv_cb);
+}
+
^ permalink raw reply related [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-07-18 5:44 ` Marcin Obara
@ 2008-07-18 17:39 ` Marcin Obara
2008-07-18 19:23 ` Marcin Obara
0 siblings, 1 reply; 42+ messages in thread
From: Marcin Obara @ 2008-07-18 17:39 UTC (permalink / raw)
To: linux-kernel
Minor cleanup: Added "const" to parameters of 3 functions.
The Intel Management Engine Interface (aka HECI: Host Embedded
Controller Interface ) enables communication between the host OS and
the Management Engine firmware. MEI is bi-directional, and either the
host or Intel AMT firmware can initiate transactions.
The core hardware architecture of Intel Active Management Technology
(Intel AMT) is resident in firmware. The micro-controller within the
chipset's graphics and memory controller (GMCH) hub houses the
Management Engine (ME) firmware, which implements various services
on behalf of management applications.
Some of the ME subsystems that can be access via MEI driver:
- Intel(R) Quiet System Technology (QST) is implemented as a firmware
subsystem that runs in the ME. Programs that wish to expose the
health monitoring and fan speed control capabilities of Intel(R) QST
will need to use the MEI driver to communicate with the ME sub-system.
- ASF is the "Alert Standard Format" which is an DMTF manageability
standard. It is implemented in the PC's hardware and firmware, and is
managed from a remote console.
Most recent Intel desktop chipsets have one or more of the above ME
services. The MEI driver will make it possible to support the above
features on Linux and provides applications access to the ME and it's
features.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Signed-off-by: Marcin Obara <marcin.obara@intel.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 93fd6b2..adb913b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2195,6 +2195,15 @@ L: e1000-devel@lists.sourceforge.net
W: http://e1000.sourceforge.net/
S: Supported
+INTEL MANAGEABILITY ENGINE INTERFACE (HECI)
+P: Anas Nashif
+M: anas.nashif@intel.com
+P: Marcin Obara
+M: marcin.obara@intel.com
+W: http://www.openamt.org/
+L: openamt-devel@lists.sourceforge.net
+S: Supported
+
INTEL PRO/WIRELESS 2100 NETWORK CONNECTION SUPPORT
P: Zhu Yi
M: yi.zhu@intel.com
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 650e6b4..9872215 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -1103,6 +1103,7 @@ config DEVPORT
default y
source "drivers/s390/char/Kconfig"
+source "drivers/char/heci/Kconfig"
endmenu
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 0e0d12a..1d5e700 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -107,6 +107,7 @@ obj-$(CONFIG_IPMI_HANDLER) += ipmi/
obj-$(CONFIG_HANGCHECK_TIMER) += hangcheck-timer.o
obj-$(CONFIG_TCG_TPM) += tpm/
+obj-$(CONFIG_INTEL_MEI) += heci/
obj-$(CONFIG_PS3_FLASH) += ps3flash.o
diff --git a/drivers/char/heci/Kconfig b/drivers/char/heci/Kconfig
new file mode 100644
index 0000000..99b7d05
--- /dev/null
+++ b/drivers/char/heci/Kconfig
@@ -0,0 +1,12 @@
+#
+# HECI device configuration
+#
+
+config INTEL_MEI
+ tristate "Intel Management Engine Interface (MEI) Support (EXPERIMENTAL)"
+ depends on EXPERIMENTAL
+ ---help---
+ The Intel Management Engine Interface (Intel MEI) driver allows
+ applications to access the Active Management Technology
+ firmware and other Management Engine sub-systems.
+
diff --git a/drivers/char/heci/Makefile b/drivers/char/heci/Makefile
new file mode 100644
index 0000000..a2d7182
--- /dev/null
+++ b/drivers/char/heci/Makefile
@@ -0,0 +1,7 @@
+#
+## Makefile for the Intel MEI driver (heci)
+#
+
+obj-$(CONFIG_INTEL_MEI) += heci.o
+
+heci-objs := heci_init.o heci_interface.o heci_main.o interrupt.o io_heci.o
diff --git a/drivers/char/heci/heci.h b/drivers/char/heci/heci.h
new file mode 100644
index 0000000..0d5169a
--- /dev/null
+++ b/drivers/char/heci/heci.h
@@ -0,0 +1,176 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_H_
+#define _HECI_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+extern const struct guid heci_pthi_guid;
+extern const struct guid heci_wd_guid;
+extern const __u8 start_wd_params[];
+extern const __u8 stop_wd_params[];
+extern const __u8 heci_wd_state_independence_msg[3][4];
+
+/*
+ * heci device ID
+ */
+#define HECI_DEV_ID_82946GZ 0x2974 /* 82946GZ/GL */
+#define HECI_DEV_ID_82G35 0x2984 /* 82G35 Express */
+#define HECI_DEV_ID_82Q965 0x2994 /* 82Q963/Q965 */
+#define HECI_DEV_ID_82G965 0x29A4 /* 82P965/G965 */
+
+#define HECI_DEV_ID_82GM965 0x2A04 /* Mobile PM965/GM965 */
+#define HECI_DEV_ID_82GME965 0x2A14 /* Mobile GME965/GLE960 */
+
+#define HECI_DEV_ID_ICH9_82Q35 0x29B4 /* 82Q35 Express */
+#define HECI_DEV_ID_ICH9_82G33 0x29C4 /* 82G33/G31/P35/P31 Express */
+#define HECI_DEV_ID_ICH9_82Q33 0x29D4 /* 82Q33 Express */
+#define HECI_DEV_ID_ICH9_82X38 0x29E4 /* 82X38/X48 Express */
+#define HECI_DEV_ID_ICH9_3200 0x29F4 /* 3200/3210 Server */
+
+#define HECI_DEV_ID_ICH9_6 0x28B4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_7 0x28C4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_8 0x28D4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_9 0x28E4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_10 0x28F4 /* Bearlake */
+
+#define HECI_DEV_ID_ICH9M_1 0x2A44 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_2 0x2A54 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_3 0x2A64 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_4 0x2A74 /* Cantiga */
+
+#define HECI_DEV_ID_ICH10_1 0x2E04 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_2 0x2E14 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_3 0x2E24 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_4 0x2E34 /* Eaglelake */
+
+/*
+ * heci init function prototypes
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev);
+void heci_reset(struct iamt_heci_device *dev, int interrupts);
+int heci_hw_init(struct iamt_heci_device *dev);
+int heci_task_initialize_clients(void *data);
+int heci_initialize_clients(struct iamt_heci_device *dev);
+struct heci_file_private *heci_alloc_file_private(struct file *file);
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev);
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext);
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id);
+
+/*
+ * interrupt function prototype
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id);
+
+void heci_wd_timer(unsigned long data);
+
+/*
+ * input output function prototype
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_connect_client(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file);
+
+int heci_ioctl_wd(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_bypass_wd(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_start_read(struct iamt_heci_device *device, int if_num,
+ struct heci_file_private *file_ext);
+
+int pthi_write(struct iamt_heci_device *device,
+ struct heci_cb_private *priv_cb);
+
+int pthi_read(struct iamt_heci_device *device, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset);
+
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *device,
+ struct file *file);
+
+void run_next_iamthif_cmd(struct iamt_heci_device *device);
+
+void heci_free_cb_private(struct heci_cb_private *priv_cb);
+
+/**
+ * heci_fe_same_id - tell if file private data have same id
+ *
+ * @fe1: private data of 1. file object
+ * @fe2: private data of 2. file object
+ *
+ * returns !=0 - if ids are the same, 0 - if differ.
+ */
+static inline int heci_fe_same_id(const struct heci_file_private *fe1,
+ const struct heci_file_private *fe2)
+{
+ return ((fe1->host_client_id == fe2->host_client_id)
+ && (fe1->me_client_id == fe2->me_client_id));
+}
+
+#endif /* _HECI_H_ */
diff --git a/drivers/char/heci/heci_data_structures.h b/drivers/char/heci/heci_data_structures.h
new file mode 100644
index 0000000..1321721
--- /dev/null
+++ b/drivers/char/heci/heci_data_structures.h
@@ -0,0 +1,524 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_DATA_STRUCTURES_H_
+#define _HECI_DATA_STRUCTURES_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+
+/*
+ * error code definition
+ */
+#define ESLOTS_OVERFLOW 1
+#define ECORRUPTED_MESSAGE_HEADER 1000
+#define ECOMPLETE_MESSAGE 1001
+
+#define HECI_FC_MESSAGE_RESERVED_LENGTH 5
+
+/*
+ * Number of queue lists used by this driver
+ */
+#define HECI_IO_LISTS_NUMBER 7
+
+/*
+ * Maximum transmission unit (MTU) of heci messages
+ */
+#define IAMTHIF_MTU 4160
+
+
+/*
+ * HECI HW Section
+ */
+
+/* HECI registers */
+/* H_CB_WW - Host Circular Buffer (CB) Write Window register */
+#define H_CB_WW 0
+/* H_CSR - Host Control Status register */
+#define H_CSR 4
+/* ME_CB_RW - ME Circular Buffer Read Window register (read only) */
+#define ME_CB_RW 8
+/* ME_CSR_HA - ME Control Status Host Access register (read only) */
+#define ME_CSR_HA 0xC
+
+
+/* register bits of H_CSR (Host Control Status register) */
+/* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */
+#define H_CBD 0xFF000000
+/* Host Circular Buffer Write Pointer */
+#define H_CBWP 0x00FF0000
+/* Host Circular Buffer Read Pointer */
+#define H_CBRP 0x0000FF00
+/* Host Reset */
+#define H_RST 0x00000010
+/* Host Ready */
+#define H_RDY 0x00000008
+/* Host Interrupt Generate */
+#define H_IG 0x00000004
+/* Host Interrupt Status */
+#define H_IS 0x00000002
+/* Host Interrupt Enable */
+#define H_IE 0x00000001
+
+
+/* register bits of ME_CSR_HA (ME Control Status Host Access register) */
+/* ME CB (Circular Buffer) Depth HRA (Host Read Access)
+ * - host read only access to ME_CBD */
+#define ME_CBD_HRA 0xFF000000
+/* ME CB Write Pointer HRA - host read only access to ME_CBWP */
+#define ME_CBWP_HRA 0x00FF0000
+/* ME CB Read Pointer HRA - host read only access to ME_CBRP */
+#define ME_CBRP_HRA 0x0000FF00
+/* ME Reset HRA - host read only access to ME_RST */
+#define ME_RST_HRA 0x00000010
+/* ME Ready HRA - host read only access to ME_RDY */
+#define ME_RDY_HRA 0x00000008
+/* ME Interrupt Generate HRA - host read only access to ME_IG */
+#define ME_IG_HRA 0x00000004
+/* ME Interrupt Status HRA - host read only access to ME_IS */
+#define ME_IS_HRA 0x00000002
+/* ME Interrupt Enable HRA - host read only access to ME_IE */
+#define ME_IE_HRA 0x00000001
+
+#define HECI_MINORS_BASE 1
+#define HECI_MINORS_COUNT 1
+
+#define HECI_MINOR_NUMBER 1
+#define HECI_MAX_OPEN_HANDLE_COUNT 253
+
+/*
+ * debug kernel print macro define
+ */
+extern int heci_debug;
+
+#define DBG(format, arg...) do { \
+ if (heci_debug) \
+ printk(KERN_INFO "heci: %s: " format , __func__ , ## arg); \
+} while (0)
+
+
+/*
+ * time to wait HECI become ready after init
+ */
+#define HECI_INTEROP_TIMEOUT (HZ * 7)
+
+/*
+ * watch dog definition
+ */
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+#define HECI_WD_STATE_INDEPENDENCE_MSG_SENT (1 << 0)
+
+#define HECI_WD_HOST_CLIENT_ID 1
+#define HECI_IAMTHIF_HOST_CLIENT_ID 2
+
+struct guid {
+ __u32 data1;
+ __u16 data2;
+ __u16 data3;
+ __u8 data4[8];
+} __attribute__((packed));
+
+/* File state */
+enum file_state {
+ HECI_FILE_INITIALIZING = 0,
+ HECI_FILE_CONNECTING,
+ HECI_FILE_CONNECTED,
+ HECI_FILE_DISCONNECTING,
+ HECI_FILE_DISCONNECTED
+};
+
+/* HECI device states */
+enum heci_states {
+ HECI_INITIALIZING = 0,
+ HECI_ENABLED,
+ HECI_RESETING,
+ HECI_DISABLED,
+ HECI_RECOVERING_FROM_RESET,
+ HECI_POWER_DOWN,
+ HECI_POWER_UP
+};
+
+enum iamthif_states {
+ HECI_IAMTHIF_IDLE,
+ HECI_IAMTHIF_WRITING,
+ HECI_IAMTHIF_FLOW_CONTROL,
+ HECI_IAMTHIF_READING,
+ HECI_IAMTHIF_READ_COMPLETE
+};
+
+enum heci_file_transaction_states {
+ HECI_IDLE,
+ HECI_WRITING,
+ HECI_WRITE_COMPLETE,
+ HECI_FLOW_CONTROL,
+ HECI_READING,
+ HECI_READ_COMPLETE
+};
+
+/* HECI CB */
+enum heci_cb_major_types {
+ HECI_READ = 0,
+ HECI_WRITE,
+ HECI_IOCTL,
+ HECI_OPEN,
+ HECI_CLOSE
+};
+
+/* HECI user data struct */
+struct heci_message_data {
+ __u32 size;
+ char *data;
+} __attribute__((packed));
+
+#define HECI_CONNECT_TIMEOUT 3 /* at least 2 seconds */
+
+#define IAMTHIF_STALL_TIMER 12 /* seconds */
+#define IAMTHIF_READ_TIMER 15 /* seconds */
+
+struct heci_cb_private {
+ struct list_head cb_list;
+ enum heci_cb_major_types major_file_operations;
+ void *file_private;
+ struct heci_message_data request_buffer;
+ struct heci_message_data response_buffer;
+ unsigned long information;
+ unsigned long read_time;
+ struct file *file_object;
+};
+
+/* Private file struct */
+struct heci_file_private {
+ struct list_head link;
+ struct file *file;
+ enum file_state state;
+ wait_queue_head_t tx_wait;
+ wait_queue_head_t rx_wait;
+ wait_queue_head_t wait;
+ spinlock_t file_lock; /* file lock */
+ spinlock_t read_io_lock; /* read lock */
+ spinlock_t write_io_lock; /* write lock */
+ int read_pending;
+ int status;
+ /* ID of client connected */
+ __u8 host_client_id;
+ __u8 me_client_id;
+ __u8 flow_ctrl_creds;
+ __u8 timer_count;
+ enum heci_file_transaction_states reading_state;
+ enum heci_file_transaction_states writing_state;
+ int sm_state;
+ struct heci_cb_private *read_cb;
+};
+
+struct io_heci_list {
+ struct heci_cb_private heci_cb;
+ int status;
+ struct iamt_heci_device *device_extension;
+};
+
+struct heci_driver_version {
+ __u8 major;
+ __u8 minor;
+ __u8 hotfix;
+ __u16 build;
+} __attribute__((packed));
+
+
+struct heci_client {
+ __u32 max_msg_length;
+ __u8 protocol_version;
+} __attribute__((packed));
+
+/*
+ * HECI BUS Interface Section
+ */
+struct heci_msg_hdr {
+ __u32 me_addr:8;
+ __u32 host_addr:8;
+ __u32 length:9;
+ __u32 reserved:6;
+ __u32 msg_complete:1;
+} __attribute__((packed));
+
+
+struct hbm_cmd {
+ __u8 cmd:7;
+ __u8 is_response:1;
+} __attribute__((packed));
+
+
+struct heci_bus_message {
+ struct hbm_cmd cmd;
+ __u8 command_specific_data[];
+} __attribute__((packed));
+
+struct hbm_version {
+ __u8 minor_version;
+ __u8 major_version;
+} __attribute__((packed));
+
+struct hbm_host_version_request {
+ struct hbm_cmd cmd;
+ __u8 reserved;
+ struct hbm_version host_version;
+} __attribute__((packed));
+
+struct hbm_host_version_response {
+ struct hbm_cmd cmd;
+ int host_version_supported;
+ struct hbm_version me_max_version;
+} __attribute__((packed));
+
+struct hbm_host_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_stop_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_me_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_enum_request {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_host_enum_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+ __u8 valid_addresses[32];
+} __attribute__((packed));
+
+struct heci_client_properties {
+ struct guid protocol_name;
+ __u8 protocol_version;
+ __u8 max_number_of_connections;
+ __u8 fixed_address;
+ __u8 single_recv_buf;
+ __u32 max_msg_length;
+} __attribute__((packed));
+
+struct hbm_props_request {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+
+struct hbm_props_response {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 status;
+ __u8 reserved[1];
+ struct heci_client_properties client_properties;
+} __attribute__((packed));
+
+struct hbm_client_connect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved;
+} __attribute__((packed));
+
+struct hbm_client_connect_response {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 status;
+} __attribute__((packed));
+
+struct hbm_client_disconnect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[1];
+} __attribute__((packed));
+
+struct hbm_flow_control {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[HECI_FC_MESSAGE_RESERVED_LENGTH];
+} __attribute__((packed));
+
+struct heci_me_client {
+ struct heci_client_properties props;
+ __u8 client_id;
+ __u8 flow_ctrl_creds;
+} __attribute__((packed));
+
+/* private device struct */
+struct iamt_heci_device {
+ struct pci_dev *pdev; /* pointer to pci device struct */
+ /*
+ * lists of queues
+ */
+ /* array of pointers to aio lists */
+ struct io_heci_list *io_list_array[HECI_IO_LISTS_NUMBER];
+ struct io_heci_list read_list; /* driver read queue */
+ struct io_heci_list write_list; /* driver write queue */
+ struct io_heci_list write_waiting_list; /* write waiting queue */
+ struct io_heci_list ctrl_wr_list; /* managed write IOCTL list */
+ struct io_heci_list ctrl_rd_list; /* managed read IOCTL list */
+ struct io_heci_list pthi_cmd_list; /* PTHI list for cmd waiting */
+
+ /* driver managed PTHI list for reading completed pthi cmd data */
+ struct io_heci_list pthi_read_complete_list;
+ /*
+ * list of files
+ */
+ struct list_head file_list;
+ /*
+ * memory of device
+ */
+ unsigned int mem_base;
+ unsigned int mem_length;
+ char *mem_addr;
+ /*
+ * lock for the device
+ */
+ spinlock_t device_lock; /* device lock*/
+ struct work_struct work;
+ int recvd_msg;
+
+ struct task_struct *reinit_tsk;
+
+ struct timer_list wd_timer;
+ /*
+ * hw states of host and fw(ME)
+ */
+ __u32 host_hw_state;
+ __u32 me_hw_state;
+ /*
+ * waiting queue for receive message from FW
+ */
+ wait_queue_head_t wait_recvd_msg;
+ wait_queue_head_t wait_stop_wd;
+ /*
+ * heci device states
+ */
+ enum heci_states heci_state;
+ int stop;
+
+ __u32 extra_write_index;
+ __u32 rd_msg_buf[128]; /* used for control messages */
+ __u32 wr_msg_buf[128]; /* used for control messages */
+ __u32 ext_msg_buf[8]; /* for control responses */
+ __u32 rd_msg_hdr;
+
+ struct hbm_version version;
+
+ int host_buffer_is_empty;
+ struct heci_file_private wd_file_ext;
+ struct heci_me_client *me_clients; /* Note: memory has to be allocated*/
+ __u8 heci_me_clients[32]; /* list of existing clients */
+ __u8 num_heci_me_clients;
+ __u8 heci_host_clients[32]; /* list of existing clients */
+ __u8 current_host_client_id;
+
+ int wd_pending;
+ int wd_stoped;
+ __u16 wd_timeout; /* seconds ((wd_data[1] << 8) + wd_data[0]) */
+ unsigned char wd_data[HECI_START_WD_DATA_SIZE];
+
+
+ __u16 wd_due_counter;
+ int asf_mode;
+ int wd_bypass; /* if 1, don't refresh watchdog ME client */
+
+ struct file *iamthif_file_object;
+ struct heci_file_private iamthif_file_ext;
+ int iamthif_ioctl;
+ int iamthif_canceled;
+ __u32 iamthif_timer;
+ __u32 iamthif_stall_timer;
+ unsigned char iamthif_msg_buf[IAMTHIF_MTU];
+ __u32 iamthif_msg_buf_size;
+ __u32 iamthif_msg_buf_index;
+ int iamthif_flow_control_pending;
+ enum iamthif_states iamthif_state;
+
+ struct heci_cb_private *iamthif_current_cb;
+ __u8 write_hang;
+ int need_reset;
+ long open_handle_count;
+
+};
+
+/**
+ * read_heci_register - Read a byte from the heci device
+ *
+ * @device: the device structure
+ * @offset: offset from which to read the data
+ *
+ * returns the byte read.
+ */
+__u32 read_heci_register(struct iamt_heci_device *device,
+ unsigned long offset);
+
+/**
+ * write_heci_register - Write 4 bytes to the heci device
+ *
+ * @device: the device structure
+ * @offset: offset from which to write the data
+ * @value: the byte to write
+ */
+void write_heci_register(struct iamt_heci_device *device, unsigned long offset,
+ __u32 value);
+
+#endif /* _HECI_DATA_STRUCTURES_H_ */
diff --git a/drivers/char/heci/heci_init.c b/drivers/char/heci/heci_init.c
new file mode 100644
index 0000000..52ad7a1
--- /dev/null
+++ b/drivers/char/heci/heci_init.c
@@ -0,0 +1,1080 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/moduleparam.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+
+#include "heci_data_structures.h"
+#include "heci_interface.h"
+#include "heci.h"
+
+
+const __u8 watch_dog_data[] = {
+ 1, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
+};
+const __u8 start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 };
+const __u8 stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10 };
+
+const __u8 heci_wd_state_independence_msg[3][4] = {
+ {0x05, 0x02, 0x51, 0x10},
+ {0x05, 0x02, 0x52, 0x10},
+ {0x07, 0x02, 0x01, 0x10}
+};
+
+const struct guid heci_asf_guid = {
+ 0x75B30CD6, 0xA29E, 0x4AF7,
+ {0xA7, 0x12, 0xE6, 0x17, 0x43, 0x93, 0xC8, 0xA6}
+};
+const struct guid heci_wd_guid = {
+ 0x05B79A6F, 0x4628, 0x4D7F,
+ {0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB}
+};
+const struct guid heci_pthi_guid = {
+ 0x12f80028, 0xb4b7, 0x4b2d,
+ {0xac, 0xa8, 0x46, 0xe0, 0xff, 0x65, 0x81, 0x4c}
+};
+
+
+/*
+ * heci init function prototypes
+ */
+static void heci_check_asf_mode(struct iamt_heci_device *dev);
+static int host_start_message(struct iamt_heci_device *dev);
+static int host_enum_clients_message(struct iamt_heci_device *dev);
+static int allocate_me_clients_storage(struct iamt_heci_device *dev);
+static void host_init_wd(struct iamt_heci_device *dev);
+static void host_init_iamthif(struct iamt_heci_device *dev);
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout);
+
+
+/**
+ * heci_initialize_list - Sets up a queue list.
+ *
+ * @list: An instance of our list structure
+ * @dev: Device object for our driver
+ */
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev)
+{
+ /* initialize our queue list */
+ INIT_LIST_HEAD(&list->heci_cb.cb_list);
+ list->status = 0;
+ list->device_extension = dev;
+}
+
+/**
+ * heci_flush_queues - flush our queues list belong to file_ext.
+ *
+ * @dev: Device object for our driver
+ * @file_ext: private data of the file object
+ */
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int i;
+
+ if (!dev || !file_ext)
+ return;
+
+ /* flush our queue list belong to file_ext */
+ for (i = 0; i < HECI_IO_LISTS_NUMBER; i++) {
+ DBG("remove list entry belong to file_ext\n");
+ heci_flush_list(dev->io_list_array[i], file_ext);
+ }
+}
+
+
+/**
+ * heci_flush_list - remove list entry belong to file_ext.
+ *
+ * @list: An instance of our list structure
+ * @file_ext: private data of the file object
+ */
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext)
+{
+ struct heci_file_private *file_ext_tmp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if (!list || !file_ext)
+ return;
+
+ if (list->status != 0)
+ return;
+
+ if (list_empty(&list->heci_cb.cb_list))
+ return;
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &list->heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos) {
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext_tmp) {
+ if (heci_fe_same_id(file_ext, file_ext_tmp))
+ list_del(&priv_cb_pos->cb_list);
+ }
+ }
+ }
+}
+
+/**
+ * heci_reset_iamthif_params - initializes heci device iamthif
+ *
+ * @dev: The heci device structure
+ */
+static void heci_reset_iamthif_params(struct iamt_heci_device *dev)
+{
+ /* reset iamthif parameters. */
+ dev->iamthif_current_cb = NULL;
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_file_ext.file = NULL;
+ dev->iamthif_ioctl = 0;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+}
+
+/**
+ * init_heci_device - allocates and initializes the heci device structure
+ *
+ * @pdev: The pci device structure
+ *
+ * returns The heci_device_device pointer on success, NULL on failure.
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev)
+{
+ int i;
+ struct iamt_heci_device *device;
+
+ device = kzalloc(sizeof(struct iamt_heci_device), GFP_KERNEL);
+ if (!device)
+ return NULL;
+
+ /* setup our list array */
+ device->io_list_array[0] = &device->read_list;
+ device->io_list_array[1] = &device->write_list;
+ device->io_list_array[2] = &device->write_waiting_list;
+ device->io_list_array[3] = &device->ctrl_wr_list;
+ device->io_list_array[4] = &device->ctrl_rd_list;
+ device->io_list_array[5] = &device->pthi_cmd_list;
+ device->io_list_array[6] = &device->pthi_read_complete_list;
+ INIT_LIST_HEAD(&device->file_list);
+ INIT_LIST_HEAD(&device->wd_file_ext.link);
+ INIT_LIST_HEAD(&device->iamthif_file_ext.link);
+ spin_lock_init(&device->device_lock);
+ init_waitqueue_head(&device->wait_recvd_msg);
+ init_waitqueue_head(&device->wait_stop_wd);
+ device->heci_state = HECI_INITIALIZING;
+ device->iamthif_state = HECI_IAMTHIF_IDLE;
+
+ /* init work for schedule work */
+ INIT_WORK(&device->work, NULL);
+ for (i = 0; i < HECI_IO_LISTS_NUMBER; i++)
+ heci_initialize_list(device->io_list_array[i], device);
+ device->pdev = pdev;
+ return device;
+}
+
+
+
+
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout)
+{
+ return wait_event_interruptible_timeout(dev->wait_recvd_msg,
+ (dev->recvd_msg), timeout);
+}
+
+/**
+ * heci_hw_init - init host and fw to start work.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_hw_init(struct iamt_heci_device *dev)
+{
+ int err = 0;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ DBG("host_hw_state = 0x%08x, mestate = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ /* acknowledge interrupt and stop interupts */
+ heci_set_csr_register(dev);
+ }
+ dev->recvd_msg = 0;
+ DBG("reset in start the heci device.\n");
+
+ heci_reset(dev, 1);
+
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ /* wait for ME to turn on ME_RDY */
+ if (!dev->recvd_msg)
+ err = heci_wait_event_int_timeout(dev, HECI_INTEROP_TIMEOUT);
+
+ if (!err && !dev->recvd_msg) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("wait_event_interruptible_timeout failed"
+ "on wait for ME to turn on ME_RDY.\n");
+ return -ENODEV;
+ } else {
+ if (!(((dev->host_hw_state & H_RDY) == H_RDY)
+ && ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state,
+ dev->me_hw_state);
+
+ if (!(dev->host_hw_state & H_RDY) != H_RDY)
+ DBG("host turn off H_RDY.\n");
+
+ if (!(dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ DBG("ME turn off ME_RDY.\n");
+
+ printk(KERN_ERR
+ "heci: link layer initialization failed.\n");
+ return -ENODEV;
+ }
+ }
+ dev->recvd_msg = 0;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+ DBG("ME turn on ME_RDY and host turn on H_RDY.\n");
+ printk(KERN_INFO "heci: link layer has been established.\n");
+ return 0;
+}
+
+/**
+ * heci_hw_reset - reset fw via heci csr register.
+ *
+ * @dev: Device object for our driver
+ * @interrupts: if interrupt should be enable after reset.
+ */
+static void heci_hw_reset(struct iamt_heci_device *dev, int interrupts)
+{
+ dev->host_hw_state |= (H_RST | H_IG);
+
+ if (interrupts)
+ heci_csr_enable_interrupts(dev);
+ else
+ heci_csr_disable_interrupts(dev);
+
+ BUG_ON((dev->host_hw_state & H_RST) != H_RST);
+ BUG_ON((dev->host_hw_state & H_RDY) != 0);
+}
+
+/**
+ * heci_reset - reset host and fw.
+ *
+ * @dev: Device object for our driver
+ * @interrupts: if interrupt should be enable after reset.
+ */
+void heci_reset(struct iamt_heci_device *dev, int interrupts)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int unexpected = 0;
+
+ if (dev->heci_state == HECI_RECOVERING_FROM_RESET) {
+ dev->need_reset = 1;
+ return;
+ }
+
+ if (dev->heci_state != HECI_INITIALIZING &&
+ dev->heci_state != HECI_DISABLED &&
+ dev->heci_state != HECI_POWER_DOWN &&
+ dev->heci_state != HECI_POWER_UP)
+ unexpected = 1;
+
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+
+ DBG("before reset host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ heci_hw_reset(dev, interrupts);
+
+ dev->host_hw_state &= ~H_RST;
+ dev->host_hw_state |= H_IG;
+
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+
+ DBG("currently saved host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ dev->need_reset = 0;
+
+ if (dev->heci_state != HECI_INITIALIZING) {
+ if ((dev->heci_state != HECI_DISABLED) &&
+ (dev->heci_state != HECI_POWER_DOWN))
+ dev->heci_state = HECI_RESETING;
+
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->flow_ctrl_creds = 0;
+ file_pos->read_cb = NULL;
+ file_pos->timer_count = 0;
+ }
+ /* remove entry if already in list */
+ DBG("list del iamthif and wd file list.\n");
+ heci_remove_client_from_file_list(dev,
+ dev->wd_file_ext.host_client_id);
+
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+
+ heci_reset_iamthif_params(dev);
+ dev->wd_due_counter = 0;
+ dev->extra_write_index = 0;
+ }
+
+ dev->num_heci_me_clients = 0;
+ dev->rd_msg_hdr = 0;
+ dev->stop = 0;
+ dev->wd_pending = 0;
+
+ /* update the state of the registers after reset */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ DBG("after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if (unexpected)
+ printk(KERN_WARNING "heci: unexpected reset.\n");
+
+ /* Wake up all readings so they can be interrupted */
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (&file_pos->rx_wait &&
+ waitqueue_active(&file_pos->rx_wait)) {
+ printk(KERN_INFO "heci: Waking up client!\n");
+ wake_up_interruptible(&file_pos->rx_wait);
+ }
+ }
+ /* remove all waiting requests */
+ if (dev->write_list.status == 0 &&
+ !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos) {
+ list_del(&priv_cb_pos->cb_list);
+ heci_free_cb_private(priv_cb_pos);
+ }
+ }
+ }
+}
+
+/**
+ * heci_initialize_clients - heci communication initialization.
+ *
+ * @dev: Device object for our driver
+ */
+int heci_initialize_clients(struct iamt_heci_device *dev)
+{
+ int status;
+
+ msleep(100); /* FW needs time to be ready to talk with us */
+ DBG("link is established start sending messages.\n");
+ /* link is established start sending messages. */
+ status = host_start_message(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("start sending messages failed.\n");
+ return status;
+ }
+
+ /* enumerate clients */
+ status = host_enum_clients_message(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("enum clients failed.\n");
+ return status;
+ }
+ /* allocate storage for ME clients representation */
+ status = allocate_me_clients_storage(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->num_heci_me_clients = 0;
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("allocate clients failed.\n");
+ return status;
+ }
+
+ heci_check_asf_mode(dev);
+ /*heci initialization wd */
+ host_init_wd(dev);
+ /*heci initialization iamthif client */
+ host_init_iamthif(dev);
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->need_reset) {
+ dev->need_reset = 0;
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+
+ memset(dev->heci_host_clients, 0, sizeof(dev->heci_host_clients));
+ dev->open_handle_count = 0;
+ dev->heci_host_clients[0] |= 7;
+ dev->current_host_client_id = 3;
+ dev->heci_state = HECI_ENABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("initialization heci clients successful.\n");
+ return 0;
+}
+
+/**
+ * heci_task_initialize_clients - heci reinitialization task
+ *
+ * @data: Device object for our driver
+ */
+int heci_task_initialize_clients(void *data)
+{
+ int ret;
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->reinit_tsk != NULL) {
+ spin_unlock_bh(&dev->device_lock);
+ DBG("reinit task already started.\n");
+ return 0;
+ }
+ dev->reinit_tsk = current;
+ current->flags |= PF_NOFREEZE;
+ spin_unlock_bh(&dev->device_lock);
+
+ ret = heci_initialize_clients(dev);
+
+ spin_lock_bh(&dev->device_lock);
+ dev->reinit_tsk = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ return ret;
+}
+
+/**
+ * host_start_message - heci host send start message.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_start_message(struct iamt_heci_device *dev)
+{
+ long timeout = 60; /* 60 second */
+
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_version_request *host_start_req;
+ struct hbm_host_stop_request *host_stop_req;
+ int err = 0;
+
+ /* host start message */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_version_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_start_req =
+ (struct hbm_host_version_request *) &dev->wr_msg_buf[1];
+ memset(host_start_req, 0, sizeof(struct hbm_host_version_request));
+ host_start_req->cmd.cmd = HOST_START_REQ_CMD;
+ host_start_req->host_version.major_version = HBM_MAJOR_VERSION;
+ host_start_req->host_version.minor_version = HBM_MINOR_VERSION;
+ dev->recvd_msg = 0;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_start_req),
+ heci_hdr->length)) {
+ DBG("send version to fw fail.\n");
+ return -ENODEV;
+ }
+ DBG("call wait_event_interruptible_timeout for response message.\n");
+ /* wait for response */
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait_timeout failed on host start response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ DBG("wait_timeout successful on host start response message.\n");
+ if ((dev->version.major_version != HBM_MAJOR_VERSION) ||
+ (dev->version.minor_version != HBM_MINOR_VERSION)) {
+ /* send stop message */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_stop_req =
+ (struct hbm_host_stop_request *) &dev->wr_msg_buf[1];
+
+ memset(host_stop_req, 0, sizeof(struct hbm_host_stop_request));
+ host_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ host_stop_req->reason = DRIVER_STOP_REQUEST;
+ heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_stop_req),
+ heci_hdr->length);
+ DBG("version mismatch.\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/**
+ * host_enum_clients_message - host send enumeration client request message.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_enum_clients_message(struct iamt_heci_device *dev)
+{
+ long timeout = 5; /*5 second */
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_enum_request *host_enum_req;
+ int err = 0;
+ __u8 i, j;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ /* enumerate clients */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_enum_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1];
+ memset(host_enum_req, 0, sizeof(struct hbm_host_enum_request));
+ host_enum_req->cmd.cmd = HOST_ENUM_REQ_CMD;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_enum_req),
+ heci_hdr->length)) {
+ DBG("send enumeration request failed.\n");
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait_event_interruptible_timeout failed "
+ "on enumeration clients response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+
+ spin_lock_bh(&dev->device_lock);
+ /* count how many ME clients we have */
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0)
+ dev->num_heci_me_clients++;
+
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ return 0;
+}
+
+/**
+ * host_client_properties - reads properties for client
+ *
+ * @dev: Device object for our driver
+ * @idx: client index in me client array
+ * @client_id: id of the client
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_client_properties(struct iamt_heci_device *dev,
+ struct heci_me_client *client)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_props_request *host_cli_req;
+ int err;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_props_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_cli_req = (struct hbm_props_request *) &dev->wr_msg_buf[1];
+ memset(host_cli_req, 0, sizeof(struct hbm_props_request));
+ host_cli_req->cmd.cmd = HOST_CLIENT_PROPERTEIS_REQ_CMD;
+ host_cli_req->address = client->client_id;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_cli_req),
+ heci_hdr->length)) {
+ DBG("send props request failed.\n");
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev, 10 * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait failed on props resp msg.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ return 0;
+}
+
+/**
+ * allocate_me_clients_storage - allocate storage for me clients
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int allocate_me_clients_storage(struct iamt_heci_device *dev)
+{
+ struct heci_me_client *clients;
+ struct heci_me_client *client;
+ __u8 num, i, j;
+ int err;
+
+ if (dev->num_heci_me_clients <= 0)
+ return 0;
+
+ spin_lock_bh(&dev->device_lock);
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ /* allocate storage for ME clients representation */
+ clients = kcalloc(dev->num_heci_me_clients,
+ sizeof(struct heci_me_client), GFP_KERNEL);
+ if (!clients) {
+ DBG("memory allocation for ME clients failed.\n");
+ return -ENOMEM;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ dev->me_clients = clients;
+ spin_unlock_bh(&dev->device_lock);
+
+ num = 0;
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0) {
+ client = &dev->me_clients[num];
+ client->client_id = (i * 8) + j;
+ client->flow_ctrl_creds = 0;
+ err = host_client_properties(dev, client);
+ if (err != 0) {
+ spin_lock_bh(&dev->device_lock);
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+ spin_unlock_bh(&dev->device_lock);
+ return err;
+ }
+ num++;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * heci_init_file_private - initializes private file structure.
+ *
+ * @priv: private file structure to be initialized
+ * @file: the file structure
+ */
+static void heci_init_file_private(struct heci_file_private *priv,
+ struct file *file)
+{
+ memset(priv, 0, sizeof(struct heci_file_private));
+ spin_lock_init(&priv->file_lock);
+ spin_lock_init(&priv->read_io_lock);
+ spin_lock_init(&priv->write_io_lock);
+ init_waitqueue_head(&priv->wait);
+ init_waitqueue_head(&priv->rx_wait);
+ DBG("priv->rx_wait =%p\n", &priv->rx_wait);
+ init_waitqueue_head(&priv->tx_wait);
+ INIT_LIST_HEAD(&priv->link);
+ priv->reading_state = HECI_IDLE;
+ priv->writing_state = HECI_IDLE;
+}
+
+/**
+ * heci_find_me_client - search for ME client guid
+ * sets client_id in heci_file_private if found
+ * @dev: Device object for our driver
+ * @priv: private file structure to set client_id in
+ * @cguid: searched guid of ME client
+ * @client_id: id of host client to be set in file private structure
+ *
+ * returns ME client index
+ */
+static __u8 heci_find_me_client(struct iamt_heci_device *dev,
+ struct heci_file_private *priv,
+ const struct guid *cguid, __u8 client_id)
+{
+ __u8 i;
+
+ if ((dev == NULL) || (priv == NULL) || (cguid == NULL))
+ return 0;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(cguid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ priv->me_client_id = dev->me_clients[i].client_id;
+ priv->state = HECI_FILE_CONNECTING;
+ priv->host_client_id = client_id;
+
+ list_add_tail(&priv->link, &dev->file_list);
+ return i;
+ }
+ }
+ return 0;
+}
+
+/**
+ * heci_check_asf_mode - check for ASF client
+ *
+ * @dev: Device object for our driver
+ */
+static void heci_check_asf_mode(struct iamt_heci_device *dev)
+{
+ __u8 i;
+
+ spin_lock_bh(&dev->device_lock);
+ dev->asf_mode = 0;
+ /* find ME ASF client - otherwise assume AMT mode */
+ DBG("find ME ASF client - otherwise assume AMT mode.\n");
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_asf_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ dev->asf_mode = 1;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("found ME ASF client.\n");
+ return;
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+ DBG("assume AMT mode.\n");
+}
+
+/**
+ * heci_connect_me_client - connect ME client
+ * @dev: Device object for our driver
+ * @priv: private file structure
+ * @timeout: connect timeout in seconds
+ *
+ * returns 1 - if connected, 0 - if not
+ */
+static __u8 heci_connect_me_client(struct iamt_heci_device *dev,
+ struct heci_file_private *priv,
+ long timeout)
+{
+ int err = 0;
+
+ if ((dev == NULL) || (priv == NULL))
+ return 0;
+
+ if (!heci_connect(dev, priv)) {
+ DBG("failed to call heci_connect for client_id=%d.\n",
+ priv->host_client_id);
+ spin_lock_bh(&dev->device_lock);
+ heci_remove_client_from_file_list(dev, priv->host_client_id);
+ priv->state = HECI_FILE_DISCONNECTED;
+ spin_unlock_bh(&dev->device_lock);
+ return 0;
+ }
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == priv->state ||
+ HECI_FILE_DISCONNECTED == priv->state),
+ timeout * HZ);
+ if (HECI_FILE_CONNECTED != priv->state) {
+ spin_lock_bh(&dev->device_lock);
+ heci_remove_client_from_file_list(dev, priv->host_client_id);
+ DBG("failed to connect client_id=%d state=%d.\n",
+ priv->host_client_id, priv->state);
+ if (err)
+ DBG("failed connect err=%08x\n", err);
+ priv->state = HECI_FILE_DISCONNECTED;
+ spin_unlock_bh(&dev->device_lock);
+ return 0;
+ }
+ DBG("successfully connected client_id=%d.\n",
+ priv->host_client_id);
+ return 1;
+}
+
+/**
+ * host_init_wd - heci initialization wd.
+ *
+ * @dev: Device object for our driver
+ */
+static void host_init_wd(struct iamt_heci_device *dev)
+{
+ spin_lock_bh(&dev->device_lock);
+
+ heci_init_file_private(&dev->wd_file_ext, NULL);
+
+ /* look for WD client and connect to it */
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTED;
+ dev->wd_timeout = 0;
+
+ if (dev->asf_mode) {
+ memcpy(dev->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
+ } else {
+ /* AMT mode */
+ dev->wd_timeout = AMT_WD_VALUE;
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ memcpy(dev->wd_data, start_wd_params, HECI_WD_PARAMS_SIZE);
+ memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
+ &dev->wd_timeout, sizeof(__u16));
+ }
+
+ /* find ME WD client */
+ heci_find_me_client(dev, &dev->wd_file_ext,
+ &heci_wd_guid, HECI_WD_HOST_CLIENT_ID);
+ spin_unlock_bh(&dev->device_lock);
+
+ DBG("check wd_file_ext\n");
+ if (HECI_FILE_CONNECTING == dev->wd_file_ext.state) {
+ if (heci_connect_me_client(dev, &dev->wd_file_ext, 15) == 1) {
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 1;
+ else
+ dev->wd_due_counter = 0;
+ DBG("successfully connected to WD client.\n");
+ }
+ } else
+ DBG("failed to find WD client.\n");
+
+
+ spin_lock_bh(&dev->device_lock);
+ dev->wd_timer.function = &heci_wd_timer;
+ dev->wd_timer.data = (unsigned long) dev;
+ spin_unlock_bh(&dev->device_lock);
+}
+
+
+/**
+ * host_init_iamthif - heci initialization iamthif client.
+ *
+ * @dev: Device object for our driver
+ *
+ */
+static void host_init_iamthif(struct iamt_heci_device *dev)
+{
+ __u8 i;
+
+ spin_lock_bh(&dev->device_lock);
+
+ heci_init_file_private(&dev->iamthif_file_ext, NULL);
+ dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTED;
+
+ /* find ME PTHI client */
+ i = heci_find_me_client(dev, &dev->iamthif_file_ext,
+ &heci_pthi_guid, HECI_IAMTHIF_HOST_CLIENT_ID);
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTING) {
+ DBG("failed to find iamthif client.\n");
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ BUG_ON(dev->me_clients[i].props.max_msg_length != IAMTHIF_MTU);
+
+ spin_unlock_bh(&dev->device_lock);
+ if (heci_connect_me_client(dev, &dev->iamthif_file_ext, 15) == 1) {
+ DBG("connected to iamthif client.\n");
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ }
+}
+
+/**
+ * heci_alloc_file_private - allocates a private file structure and set it up.
+ * @file: the file structure
+ *
+ * returns The allocated file or NULL on failure
+ */
+struct heci_file_private *heci_alloc_file_private(struct file *file)
+{
+ struct heci_file_private *priv;
+
+ priv = kmalloc(sizeof(struct heci_file_private), GFP_KERNEL);
+ if (!priv)
+ return NULL;
+
+ heci_init_file_private(priv, file);
+
+ return priv;
+}
+
+
+
+/**
+ * heci_disconnect_host_client - send disconnect message to fw from host client.
+ *
+ * @dev: Device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int rets, err;
+ long timeout = 15; /* 15 seconds */
+ struct heci_cb_private *priv_cb;
+
+ if ((!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext->state != HECI_FILE_DISCONNECTING)
+ return 0;
+
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->file_private = file_ext;
+ priv_cb->major_file_operations = HECI_CLOSE;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (heci_disconnect(dev, file_ext)) {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ DBG("failed to call heci_disconnect.\n");
+ goto free;
+ }
+ } else {
+ DBG("add disconnect cb to control write list\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+ if (HECI_FILE_DISCONNECTED == file_ext->state) {
+ rets = 0;
+ DBG("successfully disconnected from fw client.\n");
+ } else {
+ rets = -ENODEV;
+ if (HECI_FILE_DISCONNECTED != file_ext->state)
+ DBG("wrong status client disconnect.\n");
+
+ if (err)
+ DBG("wait failed disconnect err=%08x\n", err);
+
+ DBG("failed to disconnect from fw client.\n");
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_list(&dev->ctrl_rd_list, file_ext);
+ heci_flush_list(&dev->ctrl_wr_list, file_ext);
+ spin_unlock_bh(&dev->device_lock);
+free:
+ heci_free_cb_private(priv_cb);
+ return rets;
+}
+
+/**
+ * heci_remove_client_from_file_list -
+ * remove file private data from device file list
+ *
+ * @dev: Device object for our driver
+ * @host_client_id: host client id to be removed
+ */
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (host_client_id == file_pos->host_client_id) {
+ DBG("remove host client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del_init(&file_pos->link);
+ break;
+ }
+ }
+}
diff --git a/drivers/char/heci/heci_interface.c b/drivers/char/heci/heci_interface.c
new file mode 100644
index 0000000..b553a5f
--- /dev/null
+++ b/drivers/char/heci/heci_interface.c
@@ -0,0 +1,517 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include "heci.h"
+#include "heci_interface.h"
+
+
+
+static const __u8 interface_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10};
+static const __u8 interface_stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10};
+
+/**
+ * read_heci_register - Read a byte from the heci device
+ *
+ * @device: the device structure
+ * @offset: offset from which to read the data
+ *
+ * returns the byte read.
+ */
+__u32 read_heci_register(struct iamt_heci_device *device,
+ unsigned long offset)
+{
+ return readl(device->mem_addr + offset);
+}
+
+/**
+ * write_heci_register - Write 4 bytes to the heci device
+ *
+ * @device: the device structure
+ * @offset: offset from which to write the data
+ * @value: the byte to write
+ */
+void write_heci_register(struct iamt_heci_device *device, unsigned long offset,
+ __u32 value)
+{
+ writel(value, device->mem_addr + offset);
+}
+
+
+/**
+ * heci_set_csr_register - write H_CSR register to the heci device
+ *
+ * @dev: device object for our driver
+ */
+void heci_set_csr_register(struct iamt_heci_device *dev)
+{
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+}
+
+/**
+ * heci_csr_enable_interrupts - enable heci device interrupts
+ *
+ * @dev: device object for our driver
+ */
+void heci_csr_enable_interrupts(struct iamt_heci_device *dev)
+{
+ dev->host_hw_state |= H_IE;
+ heci_set_csr_register(dev);
+}
+
+/**
+ * heci_csr_disable_interrupts - disable heci device interrupts
+ *
+ * @dev: device object for our driver
+ */
+void heci_csr_disable_interrupts(struct iamt_heci_device *dev)
+{
+ dev->host_hw_state &= ~H_IE;
+ heci_set_csr_register(dev);
+}
+
+
+/**
+ * _host_get_filled_slots - get number of device filled buffer slots
+ *
+ * @device: the device structure
+ *
+ * returns numer of filled slots
+ */
+static unsigned char _host_get_filled_slots(const struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+
+ read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8);
+ write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16);
+
+ return (unsigned char) (write_ptr - read_ptr);
+}
+
+/**
+ * host_buffer_is_empty - check if host buffer is empty.
+ *
+ * @dev: device object for our driver
+ *
+ * returns 1 if empty, 0 - otherwise.
+ */
+int host_buffer_is_empty(struct iamt_heci_device *dev)
+{
+ unsigned char filled_slots;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ filled_slots = _host_get_filled_slots(dev);
+
+ if (filled_slots > 0)
+ return 0;
+
+ return 1;
+}
+
+/**
+ * count_empty_write_slots - count write empty slots.
+ *
+ * @dev: device object for our driver
+ *
+ * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise empty slots count
+ */
+__s32 count_empty_write_slots(const struct iamt_heci_device *dev)
+{
+ unsigned char buffer_depth, filled_slots, empty_slots;
+
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = _host_get_filled_slots(dev);
+ empty_slots = buffer_depth - filled_slots;
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ return (__s32) empty_slots;
+}
+
+/**
+ * heci_write_message - write a message to heci device.
+ *
+ * @dev: device object for our driver
+ * @heci_hdr: header of message
+ * @write_buffer: message buffer will be write
+ * @write_length: message size will be write
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length)
+{
+ __u32 temp_msg = 0;
+ unsigned long bytes_written = 0;
+ unsigned char buffer_depth, filled_slots, empty_slots;
+ unsigned long dw_to_write;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ DBG("host_hw_state = 0x%08x.\n", dev->host_hw_state);
+ DBG("heci_write_message header=%08x.\n", *((__u32 *) header));
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = _host_get_filled_slots(dev);
+ empty_slots = buffer_depth - filled_slots;
+ DBG("filled = %hu, empty = %hu.\n", filled_slots, empty_slots);
+
+ dw_to_write = ((write_length + 3) / 4);
+
+ if (dw_to_write > empty_slots)
+ return 0;
+
+ write_heci_register(dev, H_CB_WW, *((__u32 *) header));
+
+ while (write_length >= 4) {
+ write_heci_register(dev, H_CB_WW,
+ *(__u32 *) (write_buffer + bytes_written));
+ bytes_written += 4;
+ write_length -= 4;
+ }
+
+ if (write_length > 0) {
+ memcpy(&temp_msg, &write_buffer[bytes_written], write_length);
+ write_heci_register(dev, H_CB_WW, temp_msg);
+ }
+
+ dev->host_hw_state |= H_IG;
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ if ((dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ return 0;
+
+ dev->write_hang = 0;
+ return 1;
+}
+
+/**
+ * count_full_read_slots - count read full slots.
+ *
+ * @dev: device object for our driver
+ *
+ * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise filled slots count
+ */
+__s32 count_full_read_slots(struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+ unsigned char buffer_depth, filled_slots;
+
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ buffer_depth = (unsigned char)((dev->me_hw_state & ME_CBD_HRA) >> 24);
+ read_ptr = (char) ((dev->me_hw_state & ME_CBRP_HRA) >> 8);
+ write_ptr = (char) ((dev->me_hw_state & ME_CBWP_HRA) >> 16);
+ filled_slots = (unsigned char) (write_ptr - read_ptr);
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ DBG("filled_slots =%08x \n", filled_slots);
+ return (__s32) filled_slots;
+}
+
+/**
+ * heci_read_slots - read a message from heci device.
+ *
+ * @dev: device object for our driver
+ * @buffer: message buffer will be write
+ * @buffer_length: message size will be read
+ */
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length)
+{
+ __u32 i = 0;
+ unsigned char temp_buf[sizeof(__u32)];
+
+ while (buffer_length >= sizeof(__u32)) {
+ ((__u32 *) buffer)[i] = read_heci_register(dev, ME_CB_RW);
+ DBG("buffer[%d]= %d\n", i, ((__u32 *) buffer)[i]);
+ i++;
+ buffer_length -= sizeof(__u32);
+ }
+
+ if (buffer_length > 0) {
+ *((__u32 *) &temp_buf) = read_heci_register(dev, ME_CB_RW);
+ memcpy(&buffer[i * 4], temp_buf, buffer_length);
+ }
+
+ dev->host_hw_state |= H_IG;
+ heci_set_csr_register(dev);
+}
+
+/**
+ * flow_ctrl_creds - check flow_control credentials.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if flow_ctrl_creds >0, 0 - otherwise.
+ */
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return 0;
+
+ if (file_ext == NULL)
+ return 0;
+
+ if (file_ext->flow_ctrl_creds > 0)
+ return 1;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].flow_ctrl_creds > 0) {
+ BUG_ON(dev->me_clients[i].props.single_recv_buf
+ == 0);
+ return 1;
+ }
+ return 0;
+ }
+ }
+ BUG();
+ return 0;
+}
+
+/**
+ * flow_ctrl_reduce - reduce flow_control.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ */
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].props.single_recv_buf != 0) {
+ BUG_ON(dev->me_clients[i].flow_ctrl_creds <= 0);
+ dev->me_clients[i].flow_ctrl_creds--;
+ } else {
+ BUG_ON(file_ext->flow_ctrl_creds <= 0);
+ file_ext->flow_ctrl_creds--;
+ }
+ return;
+ }
+ }
+ BUG();
+}
+
+/**
+ * heci_send_flow_control - send flow control to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_flow_control *heci_flow_control;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_flow_control);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_flow_control = (struct hbm_flow_control *) &dev->wr_msg_buf[1];
+ memset(heci_flow_control, 0, sizeof(heci_flow_control));
+ heci_flow_control->host_addr = file_ext->host_client_id;
+ heci_flow_control->me_addr = file_ext->me_client_id;
+ heci_flow_control->cmd.cmd = HECI_FLOW_CONTROL_CMD;
+ memset(heci_flow_control->reserved, 0,
+ sizeof(heci_flow_control->reserved));
+ DBG("sending flow control host client = %d, me client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_flow_control,
+ sizeof(struct hbm_flow_control)))
+ return 0;
+
+ return 1;
+
+}
+
+/**
+ * other_client_is_connecting - check if other
+ * client with the same client id is connected.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if other client is connected, 0 - otherwise.
+ */
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if ((file_pos->state == HECI_FILE_CONNECTING)
+ && (file_pos != file_ext)
+ && file_ext->me_client_id == file_pos->me_client_id)
+ return 1;
+
+ }
+ return 0;
+}
+
+/**
+ * heci_send_wd - send watch dog message to fw.
+ *
+ * @dev: device object for our driver
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_send_wd(struct iamt_heci_device *dev)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = dev->wd_file_ext.host_client_id;
+ heci_hdr->me_addr = dev->wd_file_ext.me_client_id;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ if (!memcmp(dev->wd_data, interface_start_wd_params,
+ HECI_WD_PARAMS_SIZE)) {
+ heci_hdr->length = HECI_START_WD_DATA_SIZE;
+ } else {
+ BUG_ON(memcmp(dev->wd_data, interface_stop_wd_params,
+ HECI_WD_PARAMS_SIZE));
+ heci_hdr->length = HECI_WD_PARAMS_SIZE;
+ }
+
+ if (!heci_write_message(dev, heci_hdr, dev->wd_data, heci_hdr->length))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_disconnect - send disconnect message to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_disconnect_request *heci_cli_disconnect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_disconnect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_disconnect =
+ (struct hbm_client_disconnect_request *) &dev->wr_msg_buf[1];
+ memset(heci_cli_disconnect, 0, sizeof(heci_cli_disconnect));
+ heci_cli_disconnect->host_addr = file_ext->host_client_id;
+ heci_cli_disconnect->me_addr = file_ext->me_client_id;
+ heci_cli_disconnect->cmd.cmd = CLIENT_DISCONNECT_REQ_CMD;
+ heci_cli_disconnect->reserved[0] = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_disconnect,
+ sizeof(struct hbm_client_disconnect_request)))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_connect - send connect message to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_request *heci_cli_connect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_connect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_connect =
+ (struct hbm_client_connect_request *) &dev->wr_msg_buf[1];
+ heci_cli_connect->host_addr = file_ext->host_client_id;
+ heci_cli_connect->me_addr = file_ext->me_client_id;
+ heci_cli_connect->cmd.cmd = CLIENT_CONNECT_REQ_CMD;
+ heci_cli_connect->reserved = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_connect,
+ sizeof(struct hbm_client_connect_request)))
+ return 0;
+
+ return 1;
+}
diff --git a/drivers/char/heci/heci_interface.h b/drivers/char/heci/heci_interface.h
new file mode 100644
index 0000000..3b8557a
--- /dev/null
+++ b/drivers/char/heci/heci_interface.h
@@ -0,0 +1,170 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#ifndef _HECI_INTERFACE_H_
+#define _HECI_INTERFACE_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+
+#define HBM_MINOR_VERSION 0
+#define HBM_MAJOR_VERSION 1
+#define HBM_TIMEOUT 1 /* 1 second */
+
+
+#define HOST_START_REQ_CMD 0x01
+#define HOST_START_RES_CMD 0x81
+
+#define HOST_STOP_REQ_CMD 0x02
+#define HOST_STOP_RES_CMD 0x82
+
+#define ME_STOP_REQ_CMD 0x03
+
+#define HOST_ENUM_REQ_CMD 0x04
+#define HOST_ENUM_RES_CMD 0x84
+
+#define HOST_CLIENT_PROPERTEIS_REQ_CMD 0x05
+#define HOST_CLIENT_PROPERTEIS_RES_CMD 0x85
+
+#define CLIENT_CONNECT_REQ_CMD 0x06
+#define CLIENT_CONNECT_RES_CMD 0x86
+
+#define CLIENT_DISCONNECT_REQ_CMD 0x07
+#define CLIENT_DISCONNECT_RES_CMD 0x87
+
+#define HECI_FLOW_CONTROL_CMD 0x08
+
+
+#define AMT_WD_VALUE 120 /* seconds */
+
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+
+/* IOCTL commands */
+#define IOCTL_HECI_GET_VERSION \
+ _IOWR('H' , 0x0, struct heci_message_data)
+#define IOCTL_HECI_CONNECT_CLIENT \
+ _IOWR('H' , 0x01, struct heci_message_data)
+#define IOCTL_HECI_WD \
+ _IOWR('H' , 0x02, struct heci_message_data)
+#define IOCTL_HECI_BYPASS_WD \
+ _IOWR('H' , 0x10, struct heci_message_data)
+
+enum heci_stop_reason_types{
+ DRIVER_STOP_REQUEST = 0x00,
+ DEVICE_D1_ENTRY = 0x01,
+ DEVICE_D2_ENTRY = 0x02,
+ DEVICE_D3_ENTRY = 0x03,
+ SYSTEM_S1_ENTRY = 0x04,
+ SYSTEM_S2_ENTRY = 0x05,
+ SYSTEM_S3_ENTRY = 0x06,
+ SYSTEM_S4_ENTRY = 0x07,
+ SYSTEM_S5_ENTRY = 0x08
+};
+
+enum me_stop_reason_types{
+ FW_UPDATE = 0x00
+};
+
+enum client_connect_status_types{
+ CCS_SUCCESS = 0x00,
+ CCS_NOT_FOUND = 0x01,
+ CCS_ALREADY_STARTED = 0x02,
+ CCS_OUT_OF_RESOURCES = 0x03,
+ CCS_MESSAGE_SMALL = 0x04
+};
+
+enum client_disconnect_status_types{
+ CDS_SUCCESS = 0x00
+};
+
+
+/*
+ * heci interface function prototypes
+ */
+void heci_set_csr_register(struct iamt_heci_device *dev);
+void heci_csr_enable_interrupts(struct iamt_heci_device *dev);
+void heci_csr_disable_interrupts(struct iamt_heci_device *dev);
+
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length);
+
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length);
+
+int host_buffer_is_empty(struct iamt_heci_device *dev);
+
+__s32 count_full_read_slots(struct iamt_heci_device *dev);
+
+__s32 count_empty_write_slots(struct iamt_heci_device *dev);
+
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_wd(struct iamt_heci_device *dev);
+
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+#endif /* _HECI_INTERFACE_H_ */
diff --git a/drivers/char/heci/heci_main.c b/drivers/char/heci/heci_main.c
new file mode 100644
index 0000000..98efaa8
--- /dev/null
+++ b/drivers/char/heci/heci_main.c
@@ -0,0 +1,1559 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/device.h>
+#include <linux/unistd.h>
+#include <linux/kthread.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+#define HECI_READ_TIMEOUT 45
+
+#define HECI_DRIVER_NAME "heci"
+
+/*
+ * heci driver strings
+ */
+char heci_driver_name[] = HECI_DRIVER_NAME;
+char heci_driver_string[] = "Intel(R) Management Engine Interface";
+char heci_driver_version[] = HECI_DRIVER_VERSION;
+char heci_copyright[] = "Copyright (c) 2003 - 2008 Intel Corporation.";
+
+
+#ifdef HECI_DEBUG
+int heci_debug = 1;
+#else
+int heci_debug;
+#endif
+MODULE_PARM_DESC(heci_debug, "Debug enabled or not");
+module_param(heci_debug, int, 0644);
+
+
+#define HECI_DEV_NAME "heci"
+
+/* heci char device for registration */
+static struct cdev heci_cdev;
+
+/* major number for device */
+static int heci_major;
+/* The device pointer */
+static struct pci_dev *heci_device;
+
+struct class *heci_class;
+struct class_device *heci_class_dev;
+
+
+/* heci_pci_tbl - PCI Device ID Table */
+static struct pci_device_id heci_pci_tbl[] = {
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82946GZ)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82Q965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GM965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GME965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82G33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82X38)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_3200)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_6)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_7)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_8)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_9)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_10)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_4)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_4)},
+ /* required last entry */
+ {0, }
+};
+
+MODULE_DEVICE_TABLE(pci, heci_pci_tbl);
+
+/*
+ * Local Function Prototypes
+ */
+static int __init heci_init_module(void);
+static void __exit heci_exit_module(void);
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent);
+static void __devexit heci_remove(struct pci_dev *pdev);
+static int heci_open(struct inode *inode, struct file *file);
+static int heci_release(struct inode *inode, struct file *file);
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset);
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data);
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset);
+static unsigned int heci_poll(struct file *file, poll_table *wait);
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state);
+static int heci_resume(struct pci_dev *pdev);
+static __u16 g_sus_wd_timeout;
+#else
+#define heci_suspend NULL
+#define heci_resume NULL
+#endif
+/*
+ * PCI driver structure
+ */
+static struct pci_driver heci_driver = {
+ .name = heci_driver_name,
+ .id_table = heci_pci_tbl,
+ .probe = heci_probe,
+ .remove = __devexit_p(heci_remove),
+ .shutdown = __devexit_p(heci_remove),
+ .suspend = heci_suspend,
+ .resume = heci_resume
+};
+
+/*
+ * file operations structure will be use heci char device.
+ */
+static struct file_operations heci_fops = {
+ .owner = THIS_MODULE,
+ .read = heci_read,
+ .ioctl = heci_ioctl,
+ .open = heci_open,
+ .release = heci_release,
+ .write = heci_write,
+ .poll = heci_poll,
+};
+
+/**
+ * heci_registration_cdev - set up the cdev structure for heci device.
+ *
+ * @dev: char device struct
+ * @hminor: minor number for registration char device
+ * @fops: file operations structure
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_registration_cdev(struct cdev *dev, int hminor,
+ struct file_operations *fops)
+{
+ int ret, devno = MKDEV(heci_major, hminor);
+
+ cdev_init(dev, fops);
+ dev->owner = THIS_MODULE;
+ ret = cdev_add(dev, devno, 1);
+ /* Fail gracefully if need be */
+ if (ret) {
+ printk(KERN_ERR "heci: Error %d registering heci device %d\n",
+ ret, hminor);
+ }
+ return ret;
+}
+
+/* Display the version of heci driver. */
+static ssize_t version_show(struct class *dev, char *buf)
+{
+ return sprintf(buf, "%s %s.\n",
+ heci_driver_string, heci_driver_version);
+}
+
+static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
+
+/**
+ * heci_register_cdev - registers heci char device
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_register_cdev(void)
+{
+ int ret;
+ dev_t dev;
+
+ /* registration of char devices */
+ ret = alloc_chrdev_region(&dev, HECI_MINORS_BASE, HECI_MINORS_COUNT,
+ HECI_DRIVER_NAME);
+ if (ret) {
+ printk(KERN_ERR "heci: Error allocating char device region.\n");
+ return ret;
+ }
+
+ heci_major = MAJOR(dev);
+
+ ret = heci_registration_cdev(&heci_cdev, HECI_MINOR_NUMBER,
+ &heci_fops);
+ if (ret)
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+
+ return ret;
+}
+
+/**
+ * heci_unregister_cdev - unregisters heci char device
+ */
+static void heci_unregister_cdev(void)
+{
+ cdev_del(&heci_cdev);
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+}
+
+/**
+ * heci_sysfs_device_create - adds device entry to sysfs
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_sysfs_device_create(void)
+{
+ struct class *class;
+ void *tmphdev;
+ int err = 0;
+
+ class = class_create(THIS_MODULE, HECI_DRIVER_NAME);
+ if (IS_ERR(class)) {
+ err = PTR_ERR(class);
+ printk(KERN_ERR "heci: Error creating heci class.\n");
+ goto err_out;
+ }
+
+ err = class_create_file(class, &class_attr_version);
+ if (err) {
+ class_destroy(class);
+ printk(KERN_ERR "heci: Error creating heci class file.\n");
+ goto err_out;
+ }
+
+ tmphdev = (void *) device_create(class, NULL, heci_cdev.dev,
+ HECI_DEV_NAME);
+ if (IS_ERR(tmphdev)) {
+ err = PTR_ERR(tmphdev);
+ class_remove_file(class, &class_attr_version);
+ class_destroy(class);
+ goto err_out;
+ }
+
+ heci_class = class;
+err_out:
+ return err;
+}
+
+/**
+ * heci_sysfs_device_remove - unregisters the device entry on sysfs
+ */
+static void heci_sysfs_device_remove(void)
+{
+ if ((heci_class == NULL) || (IS_ERR(heci_class)))
+ return;
+
+ device_destroy(heci_class, heci_cdev.dev);
+ class_remove_file(heci_class, &class_attr_version);
+ class_destroy(heci_class);
+}
+
+/**
+ * heci_init_module - Driver Registration Routine
+ *
+ * heci_init_module is the first routine called when the driver is
+ * loaded. All it does is register with the PCI subsystem.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int __init heci_init_module(void)
+{
+ int ret = 0;
+
+ printk(KERN_INFO "heci: %s - version %s\n", heci_driver_string,
+ heci_driver_version);
+ printk(KERN_INFO "heci: %s\n", heci_copyright);
+
+ /* init pci module */
+ ret = pci_register_driver(&heci_driver);
+ if (ret < 0) {
+ printk(KERN_ERR "heci: Error registering driver.\n");
+ goto end;
+ }
+
+ ret = heci_register_cdev();
+ if (ret)
+ goto unregister_pci;
+
+ ret = heci_sysfs_device_create();
+ if (ret)
+ goto unregister_cdev;
+
+ return ret;
+
+unregister_cdev:
+ heci_unregister_cdev();
+unregister_pci:
+ pci_unregister_driver(&heci_driver);
+end:
+ return ret;
+}
+
+module_init(heci_init_module);
+
+
+/**
+ * heci_exit_module - Driver Exit Cleanup Routine
+ *
+ * heci_exit_module is called just before the driver is removed
+ * from memory.
+ */
+static void __exit heci_exit_module(void)
+{
+ pci_unregister_driver(&heci_driver);
+ heci_sysfs_device_remove();
+ heci_unregister_cdev();
+}
+
+module_exit(heci_exit_module);
+
+
+/**
+ * heci_probe - Device Initialization Routine
+ *
+ * @pdev: PCI device information struct
+ * @ent: entry in kcs_pci_tbl
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct iamt_heci_device *dev = NULL;
+ int i, err = 0;
+
+ if (heci_device) {
+ err = -EEXIST;
+ goto end;
+ }
+ /* enable pci dev */
+ err = pci_enable_device(pdev);
+ if (err) {
+ printk(KERN_ERR "heci: Failed to enable pci device.\n");
+ goto end;
+ }
+ /* set PCI host mastering */
+ pci_set_master(pdev);
+ /* pci request regions for heci driver */
+ err = pci_request_regions(pdev, heci_driver_name);
+ if (err) {
+ printk(KERN_ERR "heci: Failed to get pci regions.\n");
+ goto disable_device;
+ }
+ /* allocates and initializes the heci dev structure */
+ dev = init_heci_device(pdev);
+ if (!dev) {
+ err = -ENOMEM;
+ goto release_regions;
+ }
+ /* mapping IO device memory */
+ for (i = 0; i <= 5; i++) {
+ if (pci_resource_len(pdev, i) == 0)
+ continue;
+ if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
+ printk(KERN_ERR "heci: heci has IO ports.\n");
+ goto free_device;
+ } else if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
+ if (dev->mem_base) {
+ printk(KERN_ERR
+ "heci: Too many mem addresses.\n");
+ goto free_device;
+ }
+ dev->mem_base = pci_resource_start(pdev, i);
+ dev->mem_length = pci_resource_len(pdev, i);
+ }
+ }
+ if (!dev->mem_base) {
+ printk(KERN_ERR "heci: No address to use.\n");
+ err = -ENODEV;
+ goto free_device;
+ }
+ dev->mem_addr = ioremap_nocache(dev->mem_base,
+ dev->mem_length);
+ if (!dev->mem_addr) {
+ printk(KERN_ERR "heci: Remap IO device memory failure.\n");
+ err = -ENOMEM;
+ goto free_device;
+ }
+ /* request and enable interrupt */
+ err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, dev);
+ if (err) {
+ printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
+ pdev->irq);
+ goto unmap_memory;
+ }
+
+ if (heci_hw_init(dev)) {
+ printk(KERN_ERR "heci: Init hw failure.\n");
+ err = -ENODEV;
+ goto release_irq;
+ }
+ init_timer(&dev->wd_timer);
+
+ heci_initialize_clients(dev);
+ if (dev->heci_state != HECI_ENABLED) {
+ err = -ENODEV;
+ goto release_hw;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ heci_device = pdev;
+ pci_set_drvdata(pdev, dev);
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->wd_timeout)
+ mod_timer(&dev->wd_timer, jiffies);
+
+#ifdef CONFIG_PM
+ g_sus_wd_timeout = 0;
+#endif
+ printk(KERN_INFO "heci driver initialization successful.\n");
+ return 0;
+
+release_hw:
+ /* disable interrupts */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ heci_csr_disable_interrupts(dev);
+
+ del_timer_sync(&dev->wd_timer);
+
+ flush_scheduled_work();
+
+release_irq:
+ free_irq(pdev->irq, dev);
+unmap_memory:
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+free_device:
+ kfree(dev);
+release_regions:
+ pci_release_regions(pdev);
+disable_device:
+ pci_disable_device(pdev);
+end:
+ printk(KERN_ERR "heci driver initialization failed.\n");
+ return err;
+}
+
+/**
+ * heci_remove - Device Removal Routine
+ *
+ * @pdev: PCI device information struct
+ *
+ * heci_remove is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.
+ */
+static void __devexit heci_remove(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *dev = pci_get_drvdata(pdev);
+
+ if (heci_device != pdev)
+ return;
+
+ if (dev == NULL)
+ return;
+
+ spin_lock_bh(&dev->device_lock);
+ if (heci_device != pdev) {
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+
+ del_timer_sync(&dev->wd_timer);
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
+ && dev->wd_timeout) {
+ dev->wd_timeout = 0;
+ dev->wd_due_counter = 0;
+ memcpy(dev->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
+ dev->stop = 1;
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+
+ if (!heci_send_wd(dev))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+ } else {
+ dev->wd_pending = 1;
+ }
+ dev->wd_stoped = 0;
+ spin_unlock_bh(&dev->device_lock);
+
+ wait_event_interruptible_timeout(dev->wait_stop_wd,
+ (dev->wd_stoped), 10 * HZ);
+ spin_lock_bh(&dev->device_lock);
+ if (!dev->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else
+ DBG("stop wd complete.\n");
+
+ }
+
+ heci_device = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->iamthif_file_ext.state == HECI_FILE_CONNECTED) {
+ dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->iamthif_file_ext);
+ }
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED) {
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->wd_file_ext);
+ }
+
+ spin_lock_bh(&dev->device_lock);
+
+ /* remove entry if already in list */
+ DBG("list del iamthif and wd file list.\n");
+ heci_remove_client_from_file_list(dev, dev->wd_file_ext.
+ host_client_id);
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+
+ dev->iamthif_current_cb = NULL;
+ dev->iamthif_file_ext.file = NULL;
+ dev->num_heci_me_clients = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ flush_scheduled_work();
+
+ /* disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ free_irq(pdev->irq, dev);
+ pci_set_drvdata(pdev, NULL);
+
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+
+ kfree(dev);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+}
+
+/**
+ * heci_clear_list - remove all callbacks associated with file
+ * from heci_cb_list
+ *
+ * @file: file information struct
+ * @heci_cb_list: callbacks list
+ *
+ * heci_clear_list is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * returns 1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_list(struct iamt_heci_device *dev,
+ struct file *file, struct list_head *heci_cb_list)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private*priv_cb_next = NULL;
+ struct file *file_temp;
+ int rets = 0;
+
+ /* list all list member */
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ heci_cb_list, cb_list) {
+ file_temp = (struct file *)priv_cb_pos->file_object;
+ /* check if list member associated with a file */
+ if (file_temp == file) {
+ /* remove member from the list */
+ list_del(&priv_cb_pos->cb_list);
+ /* check if cb equal to current iamthif cb */
+ if (dev->iamthif_current_cb == priv_cb_pos) {
+ dev->iamthif_current_cb = NULL;
+ /* send flow control to iamthif client */
+ heci_send_flow_control(dev,
+ &dev->iamthif_file_ext);
+ }
+ /* free all allocated buffers */
+ heci_free_cb_private(priv_cb_pos);
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_clear_lists - remove all callbacks associated with file
+ *
+ * @dev: device information struct
+ * @file: file information struct
+ *
+ * heci_clear_lists is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * returns 1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_lists(struct iamt_heci_device *dev, struct file *file)
+{
+ int rets = 0;
+
+ /* remove callbacks associated with a file */
+ heci_clear_list(dev, file, &dev->pthi_cmd_list.heci_cb.cb_list);
+ if (heci_clear_list(dev, file,
+ &dev->pthi_read_complete_list.heci_cb.cb_list))
+ rets = 1;
+
+ heci_clear_list(dev, file, &dev->ctrl_rd_list.heci_cb.cb_list);
+
+ if (heci_clear_list(dev, file, &dev->ctrl_wr_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file,
+ &dev->write_waiting_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file, &dev->write_list.heci_cb.cb_list))
+ rets = 1;
+
+ /* check if iamthif_current_cb not NULL */
+ if (dev->iamthif_current_cb && (!rets)) {
+ /* check file and iamthif current cb association */
+ if (dev->iamthif_current_cb->file_object == file) {
+ /* remove cb */
+ heci_free_cb_private(dev->iamthif_current_cb);
+ dev->iamthif_current_cb = NULL;
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_open - the open function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ *
+ * returns 0 on success, <0 on error
+ */
+static int heci_open(struct inode *inode, struct file *file)
+{
+ struct heci_file_private *file_ext;
+ int if_num = iminor(inode);
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ file_ext = heci_alloc_file_private(file);
+ if (file_ext == NULL)
+ return -ENOMEM;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENODEV;
+ }
+ if (dev->open_handle_count >= HECI_MAX_OPEN_HANDLE_COUNT) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENFILE;
+ };
+ dev->open_handle_count++;
+ list_add_tail(&file_ext->link, &dev->file_list);
+ while ((dev->heci_host_clients[dev->current_host_client_id / 8]
+ & (1 << (dev->current_host_client_id % 8))) != 0) {
+
+ dev->current_host_client_id++; /* allow overflow */
+ DBG("current_host_client_id = %d\n",
+ dev->current_host_client_id);
+ DBG("dev->open_handle_count = %lu\n",
+ dev->open_handle_count);
+ }
+ DBG("current_host_client_id = %d\n", dev->current_host_client_id);
+ file_ext->host_client_id = dev->current_host_client_id;
+ dev->heci_host_clients[file_ext->host_client_id / 8] |=
+ (1 << (file_ext->host_client_id % 8));
+ spin_unlock_bh(&dev->device_lock);
+ spin_lock(&file_ext->file_lock);
+ file_ext->state = HECI_FILE_INITIALIZING;
+ file_ext->sm_state = 0;
+
+ file->private_data = file_ext;
+ spin_unlock(&file_ext->file_lock);
+
+ return 0;
+}
+
+/**
+ * heci_release - the release function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ *
+ * returns 0 on success, <0 on error
+ */
+static int heci_release(struct inode *inode, struct file *file)
+{
+ int rets = 0;
+ int if_num = iminor(inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext != &dev->iamthif_file_ext) {
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state == HECI_FILE_CONNECTED) {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ spin_unlock(&file_ext->file_lock);
+ DBG("disconnecting client host client = %d, "
+ "ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+ rets = heci_disconnect_host_client(dev, file_ext);
+ spin_lock(&file_ext->file_lock);
+ }
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_queues(dev, file_ext);
+ DBG("remove client host client = %d, ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ if (dev->open_handle_count > 0) {
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ dev->open_handle_count--;
+ }
+ heci_remove_client_from_file_list(dev,
+ file_ext->host_client_id);
+
+ /* free read cb */
+ if (file_ext->read_cb != NULL) {
+ priv_cb = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb != NULL)
+ list_del(&priv_cb->cb_list);
+
+ priv_cb = file_ext->read_cb;
+ file_ext->read_cb = NULL;
+ }
+
+ spin_unlock_bh(&dev->device_lock);
+ file->private_data = NULL;
+ spin_unlock(&file_ext->file_lock);
+
+ if (priv_cb != NULL)
+ heci_free_cb_private(priv_cb);
+
+ kfree(file_ext);
+ } else {
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->open_handle_count > 0)
+ dev->open_handle_count--;
+
+ if (dev->iamthif_file_object == file
+ && dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi canceled iamthif state %d\n",
+ dev->iamthif_state);
+ dev->iamthif_canceled = 1;
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE) {
+ DBG("run next pthi iamthif cb\n");
+ run_next_iamthif_cmd(dev);
+ }
+ }
+
+ if (heci_clear_lists(dev, file))
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+
+ spin_unlock_bh(&dev->device_lock);
+ }
+ return rets;
+}
+
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ struct heci_file_private *file_ext_list_temp;
+
+ if (dev->read_list.status == 0
+ && !list_empty(&dev->read_list.heci_cb.cb_list)) {
+ DBG("remove read_list CB \n");
+ list_for_each_entry_safe(priv_cb_pos,
+ priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+
+ file_ext_list_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext_list_temp != NULL) &&
+ heci_fe_same_id(file_ext, file_ext_list_temp))
+ return priv_cb_pos;
+
+ }
+ }
+ return NULL;
+}
+
+/**
+ * heci_read - the read client message function.
+ *
+ * @file: pointer to file structure
+ * @ubuf: pointer to user buffer
+ * @length: buffer length
+ * @offset: data offset in buffer
+ *
+ * returns >=0 data length on success , <0 on error
+ */
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int i;
+ int rets = 0, err = 0;
+ int if_num = iminor(file->f_dentry->d_inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ spin_lock(&file_ext->file_lock);
+ if ((file_ext->sm_state & HECI_WD_STATE_INDEPENDENCE_MSG_SENT) == 0) {
+ spin_unlock(&file_ext->file_lock);
+ /* Do not allow to read watchdog client */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_wd_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (file_ext->me_client_id ==
+ dev->me_clients[i].client_id)
+ return -EBADF;
+ }
+ }
+ } else {
+ file_ext->sm_state &= ~HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+ }
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ rets = pthi_read(dev, if_num, file, ubuf, length, offset);
+ goto out;
+ }
+
+ if (file_ext->read_cb && file_ext->read_cb->information > *offset) {
+ priv_cb = file_ext->read_cb;
+ goto copy_buffer;
+ } else if (file_ext->read_cb && file_ext->read_cb->information > 0 &&
+ file_ext->read_cb->information <= *offset) {
+ priv_cb = file_ext->read_cb;
+ rets = 0;
+ goto free;
+ } else if ((!file_ext->read_cb || file_ext->read_cb->information == 0)
+ && *offset > 0) {
+ /*Offset needs to be cleaned for contingous reads*/
+ *offset = 0;
+ rets = 0;
+ goto out;
+ }
+
+ spin_lock(&file_ext->read_io_lock);
+ err = heci_start_read(dev, if_num, file_ext);
+ if (err != 0 && err != -EBUSY) {
+ DBG("heci start read failure with status = %d\n", err);
+ spin_unlock(&file_ext->read_io_lock);
+ rets = err;
+ goto out;
+ }
+ if (HECI_READ_COMPLETE != file_ext->reading_state
+ && !waitqueue_active(&file_ext->rx_wait)) {
+ if (file->f_flags & O_NONBLOCK) {
+ rets = -EAGAIN;
+ spin_unlock(&file_ext->read_io_lock);
+ goto out;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+
+ if (wait_event_interruptible(file_ext->rx_wait,
+ (HECI_READ_COMPLETE == file_ext->reading_state
+ || HECI_FILE_INITIALIZING == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTING == file_ext->state))) {
+ if (signal_pending(current)) {
+ rets = -EINTR;
+ goto out;
+ }
+ return -ERESTARTSYS;
+ }
+
+ if (HECI_FILE_INITIALIZING == file_ext->state ||
+ HECI_FILE_DISCONNECTED == file_ext->state ||
+ HECI_FILE_DISCONNECTING == file_ext->state) {
+ rets = -EBUSY;
+ goto out;
+ }
+ spin_lock(&file_ext->read_io_lock);
+ }
+
+ priv_cb = file_ext->read_cb;
+
+ if (!priv_cb) {
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENODEV;
+ }
+ if (file_ext->reading_state != HECI_READ_COMPLETE) {
+ spin_unlock(&file_ext->read_io_lock);
+ return 0;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+ /* now copy the data to user space */
+copy_buffer:
+ DBG("priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("priv_cb->information - %lu\n",
+ priv_cb->information);
+ if (length == 0 || ubuf == NULL ||
+ *offset > priv_cb->information) {
+ rets = -EMSGSIZE;
+ goto free;
+ }
+
+ /* length is being turncated to PAGE_SIZE, however, */
+ /* information size may be longer */
+ length = (length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset));
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length)) {
+ rets = -EFAULT;
+ goto free;
+ }
+
+ rets = length;
+ *offset += length;
+ if ((unsigned long)*offset < priv_cb->information)
+ goto out;
+
+free:
+ spin_lock_bh(&dev->device_lock);
+ priv_cb_pos = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb_pos != NULL)
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_cb);
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+out: DBG("end heci read rets= %d\n", rets);
+ return rets;
+}
+
+/**
+ * heci_write - the write function.
+ *
+ * @file: pointer to file structure
+ * @ubuf: pointer to user buffer
+ * @length: buffer length
+ * @offset: data offset in buffer
+ *
+ * returns >=0 data length on success , <0 on error
+ */
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int rets = 0;
+ __u8 i;
+ int if_num = iminor(file->f_dentry->d_inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_write_cb = NULL;
+ struct heci_msg_hdr heci_hdr;
+ struct iamt_heci_device *dev;
+ unsigned long currtime = get_seconds();
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb = find_pthi_read_list_entry(dev, file);
+ if ((priv_write_cb != NULL) &&
+ (((currtime - priv_write_cb->read_time) >
+ IAMTHIF_READ_TIMER) ||
+ (file_ext->reading_state == HECI_READ_COMPLETE))) {
+ (*offset) = 0;
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ priv_write_cb = NULL;
+ }
+ }
+
+ /* free entry used in read */
+ if (file_ext->reading_state == HECI_READ_COMPLETE) {
+ *offset = 0;
+ priv_write_cb = find_read_list_entry(dev, file_ext);
+ if (priv_write_cb != NULL) {
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ priv_write_cb = NULL;
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+ }
+ } else if (file_ext->reading_state == HECI_IDLE &&
+ file_ext->read_pending == 0)
+ (*offset) = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ priv_write_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_write_cb)
+ return -ENOMEM;
+
+ priv_write_cb->file_object = file;
+ priv_write_cb->file_private = file_ext;
+ priv_write_cb->request_buffer.data = kmalloc(length, GFP_KERNEL);
+ if (!priv_write_cb->request_buffer.data) {
+ kfree(priv_write_cb);
+ return -ENOMEM;
+ }
+ DBG("length =%d\n", (int) length);
+
+ if (copy_from_user(priv_write_cb->request_buffer.data,
+ ubuf, length)) {
+ rets = -EFAULT;
+ goto fail;
+ }
+
+ spin_lock(&file_ext->file_lock);
+ file_ext->sm_state = 0;
+ if ((length == 4) &&
+ ((memcmp(heci_wd_state_independence_msg[0], ubuf, 4) == 0) ||
+ (memcmp(heci_wd_state_independence_msg[1], ubuf, 4) == 0) ||
+ (memcmp(heci_wd_state_independence_msg[2], ubuf, 4) == 0)))
+ file_ext->sm_state |= HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+
+ INIT_LIST_HEAD(&priv_write_cb->cb_list);
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb->response_buffer.data =
+ kmalloc(IAMTHIF_MTU, GFP_KERNEL);
+ if (!priv_write_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->iamthif_file_ext.me_client_id)
+ break;
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients) ||
+ (dev->me_clients[i].client_id !=
+ dev->iamthif_file_ext.me_client_id)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ } else if ((length > dev->me_clients[i].props.max_msg_length)
+ || (length <= 0)) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -EMSGSIZE;
+ goto fail;
+ }
+
+
+ priv_write_cb->response_buffer.size = IAMTHIF_MTU;
+ priv_write_cb->major_file_operations = HECI_IOCTL;
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+
+ if (!list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)
+ || dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi_state = %d\n", (int) dev->iamthif_state);
+ DBG("add PTHI cb to pthi cmd waiting list\n");
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->pthi_cmd_list.heci_cb.cb_list);
+ rets = length;
+ } else {
+ DBG("call pthi write\n");
+ rets = pthi_write(dev, priv_write_cb);
+
+ if (rets != 0) {
+ DBG("pthi write failed with status = %d\n",
+ rets);
+ spin_unlock_bh(&dev->device_lock);
+ goto fail;
+ }
+ rets = length;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+ }
+
+ priv_write_cb->major_file_operations = HECI_WRITE;
+ /* make sure information is zero before we start */
+
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+
+ spin_lock(&file_ext->write_io_lock);
+ DBG("host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (file_ext->state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ DBG("host client = %d, is not connected to ME client = %d",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ goto unlock;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ file_ext->me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if (i == dev->num_heci_me_clients) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+ if (length > dev->me_clients[i].props.max_msg_length || length <= 0) {
+ rets = -EINVAL;
+ goto unlock;
+ }
+ priv_write_cb->file_private = file_ext;
+
+ spin_lock_bh(&dev->device_lock);
+ if (flow_ctrl_creds(dev, file_ext) &&
+ dev->host_buffer_is_empty) {
+ spin_unlock_bh(&dev->device_lock);
+ dev->host_buffer_is_empty = 0;
+ if (length > ((((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr))) {
+
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) -
+ sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = length;
+ heci_hdr.msg_complete = 1;
+ }
+ heci_hdr.host_addr = file_ext->host_client_id;
+ heci_hdr.me_addr = file_ext->me_client_id;
+ heci_hdr.reserved = 0;
+ DBG("call heci_write_message header=%08x.\n",
+ *((__u32 *) &heci_hdr));
+ spin_unlock(&file_ext->write_io_lock);
+ /* protect heci low level write */
+ spin_lock_bh(&dev->device_lock);
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *) (priv_write_cb->request_buffer.data),
+ heci_hdr.length)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_write_cb);
+ rets = -ENODEV;
+ priv_write_cb->information = 0;
+ return rets;
+ }
+ file_ext->writing_state = HECI_WRITING;
+ priv_write_cb->information = heci_hdr.length;
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, file_ext);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ } else {
+
+ spin_unlock_bh(&dev->device_lock);
+ priv_write_cb->information = 0;
+ file_ext->writing_state = HECI_WRITING;
+ spin_unlock(&file_ext->write_io_lock);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return length;
+
+unlock:
+ spin_unlock(&file_ext->write_io_lock);
+fail:
+ heci_free_cb_private(priv_write_cb);
+ return rets;
+
+}
+
+/**
+ * heci_ioctl - the IOCTL function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ * @cmd: ioctl command
+ * @data: pointer to heci message structure
+ *
+ * returns 0 on success , <0 on error
+ */
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data)
+{
+ int rets = 0;
+ int if_num = iminor(inode);
+ struct heci_file_private *file_ext = file->private_data;
+ /* in user space */
+ struct heci_message_data *u_msg = (struct heci_message_data *) data;
+ struct heci_message_data k_msg; /* all in kernel on the stack */
+ struct iamt_heci_device *dev;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ /* first copy from user all data needed */
+ if (copy_from_user(&k_msg, u_msg, sizeof(k_msg))) {
+ DBG("first copy from user all data needed filled\n");
+ return -EFAULT;
+ }
+ DBG("user message size is %d\n", k_msg.size);
+
+ switch (cmd) {
+ case IOCTL_HECI_GET_VERSION:
+ DBG(": IOCTL_HECI_GET_VERSION\n");
+ rets = heci_ioctl_get_version(dev, if_num, u_msg, k_msg,
+ file_ext);
+ break;
+
+ case IOCTL_HECI_CONNECT_CLIENT:
+ DBG(": IOCTL_HECI_CONNECT_CLIENT.\n");
+ rets = heci_ioctl_connect_client(dev, if_num, u_msg, k_msg,
+ file);
+ break;
+
+ case IOCTL_HECI_WD:
+ DBG(": IOCTL_HECI_WD.\n");
+ rets = heci_ioctl_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ case IOCTL_HECI_BYPASS_WD:
+ DBG(": IOCTL_HECI_BYPASS_WD.\n");
+ rets = heci_ioctl_bypass_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ default:
+ rets = -EINVAL;
+ break;
+ }
+ return rets;
+}
+
+/**
+ * heci_poll - the poll function
+ *
+ * @file: pointer to file structure
+ * @wait: pointer to poll_table structure
+ *
+ * returns poll mask
+ */
+static unsigned int heci_poll(struct file *file, poll_table *wait)
+{
+ int if_num = iminor(file->f_dentry->d_inode);
+ unsigned int mask = 0;
+ struct heci_file_private *file_ext = file->private_data;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return mask;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return mask;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return mask;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ poll_wait(file, &dev->iamthif_file_ext.wait, wait);
+ spin_lock(&dev->iamthif_file_ext.file_lock);
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE
+ && dev->iamthif_file_object == file) {
+ mask |= (POLLIN | POLLRDNORM);
+ spin_lock_bh(&dev->device_lock);
+ DBG("run next pthi cb\n");
+ run_next_iamthif_cmd(dev);
+ spin_unlock_bh(&dev->device_lock);
+ }
+ spin_unlock(&dev->iamthif_file_ext.file_lock);
+
+ } else{
+ poll_wait(file, &file_ext->tx_wait, wait);
+ spin_lock(&file_ext->write_io_lock);
+ if (HECI_WRITE_COMPLETE == file_ext->writing_state)
+ mask |= (POLLIN | POLLRDNORM);
+
+ spin_unlock(&file_ext->write_io_lock);
+ }
+
+ return mask;
+}
+
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct iamt_heci_device *device = pci_get_drvdata(pdev);
+ int err = 0;
+
+ spin_lock_bh(&device->device_lock);
+ if (device->reinit_tsk != NULL) {
+ kthread_stop(device->reinit_tsk);
+ device->reinit_tsk = NULL;
+ }
+ spin_unlock_bh(&device->device_lock);
+
+ /* Stop watchdog if exists */
+ del_timer_sync(&device->wd_timer);
+ if (device->wd_file_ext.state == HECI_FILE_CONNECTED
+ && device->wd_timeout) {
+ spin_lock_bh(&device->device_lock);
+ g_sus_wd_timeout = device->wd_timeout;
+ device->wd_timeout = 0;
+ device->wd_due_counter = 0;
+ memcpy(device->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
+ device->stop = 1;
+ if (device->host_buffer_is_empty &&
+ flow_ctrl_creds(device, &device->wd_file_ext)) {
+ device->host_buffer_is_empty = 0;
+ if (!heci_send_wd(device))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(device, &device->wd_file_ext);
+
+ device->wd_pending = 0;
+ } else {
+ device->wd_pending = 1;
+ }
+ spin_unlock_bh(&device->device_lock);
+ device->wd_stoped = 0;
+
+ err = wait_event_interruptible_timeout(device->wait_stop_wd,
+ (device->wd_stoped),
+ 10 * HZ);
+ if (!device->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else {
+ DBG("stop wd complete %d.\n", err);
+ err = 0;
+ }
+ }
+ /* Set new heci state */
+ spin_lock_bh(&device->device_lock);
+ if (device->heci_state == HECI_ENABLED ||
+ device->heci_state == HECI_RECOVERING_FROM_RESET) {
+ device->heci_state = HECI_POWER_DOWN;
+ heci_reset(device, 0);
+ }
+ spin_unlock_bh(&device->device_lock);
+
+ pci_save_state(pdev);
+
+ pci_disable_device(pdev);
+ free_irq(pdev->irq, device);
+
+ pci_set_power_state(pdev, PCI_D3hot);
+
+ return err;
+}
+
+static int heci_resume(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *device;
+ int err = 0;
+
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+
+ device = pci_get_drvdata(pdev);
+ if (!device)
+ return -ENODEV;
+
+ /* request and enable interrupt */
+ err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, device);
+ if (err) {
+ printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
+ pdev->irq);
+ return err;
+ }
+
+ spin_lock_bh(&device->device_lock);
+ device->heci_state = HECI_POWER_UP;
+ heci_reset(device, 1);
+ spin_unlock_bh(&device->device_lock);
+
+ /* Start watchdog if stopped in suspend */
+ if (g_sus_wd_timeout != 0) {
+ device->wd_timeout = g_sus_wd_timeout;
+
+ memcpy(device->wd_data, start_wd_params, HECI_WD_PARAMS_SIZE);
+ memcpy(device->wd_data + HECI_WD_PARAMS_SIZE,
+ &device->wd_timeout, sizeof(__u16));
+ device->wd_due_counter = 1;
+
+ if (device->wd_timeout)
+ mod_timer(&device->wd_timer, jiffies);
+
+ g_sus_wd_timeout = 0;
+ }
+ return err;
+}
+#endif
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(HECI_DRIVER_VERSION);
diff --git a/drivers/char/heci/heci_version.h b/drivers/char/heci/heci_version.h
new file mode 100644
index 0000000..797e84e
--- /dev/null
+++ b/drivers/char/heci/heci_version.h
@@ -0,0 +1,54 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef HECI_VERSION_H
+#define HECI_VERSION_H
+
+#define MAJOR_VERSION 5
+#define MINOR_VERSION 0
+#define QUICK_FIX_NUMBER 0
+#define VER_BUILD 30
+
+#define HECI_DRV_VER1 __stringify(MAJOR_VERSION) "." __stringify(MINOR_VERSION)
+#define HECI_DRV_VER2 __stringify(QUICK_FIX_NUMBER) "." __stringify(VER_BUILD)
+
+#define HECI_DRIVER_VERSION HECI_DRV_VER1 "." HECI_DRV_VER2
+
+#endif
diff --git a/drivers/char/heci/interrupt.c b/drivers/char/heci/interrupt.c
new file mode 100644
index 0000000..e575141
--- /dev/null
+++ b/drivers/char/heci/interrupt.c
@@ -0,0 +1,1553 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/kthread.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+
+/*
+ * interrupt function prototypes
+ */
+static void heci_bh_handler(struct work_struct *work);
+static int heci_bh_read_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static int heci_bh_write_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *connect_res);
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *disconnect_res);
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control);
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req);
+
+
+/**
+ * heci_isr_interrupt - The ISR of the HECI device
+ *
+ * @irq: The irq number
+ * @dev_id: pointer to the device structure
+ *
+ * returns irqreturn_t
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id)
+{
+ int err;
+ struct iamt_heci_device *device = (struct iamt_heci_device *) dev_id;
+
+ device->host_hw_state = read_heci_register(device, H_CSR);
+
+ if ((device->host_hw_state & H_IS) != H_IS)
+ return IRQ_NONE;
+
+ /* disable interrupts */
+ heci_csr_disable_interrupts(device);
+
+ /*
+ * Our device interrupted, schedule work the heci_bh_handler
+ * to handle the interrupt processing. This needs to be a
+ * workqueue item since the handler can sleep.
+ */
+ PREPARE_WORK(&device->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler.\n");
+ err = schedule_work(&device->work);
+ if (!err) {
+ printk(KERN_ERR "heci: schedule the heci_bh_handler"
+ " failed error=%x\n", err);
+ }
+ return IRQ_HANDLED;
+}
+
+/**
+ * _heci_cmpl - process completed operation.
+ *
+ * @file_ext: private data of the file object.
+ * @priv_cb_pos: callback block.
+ */
+static void _heci_cmpl(struct heci_file_private *file_ext,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (priv_cb_pos->major_file_operations == HECI_WRITE) {
+ heci_free_cb_private(priv_cb_pos);
+ DBG("completing write call back.\n");
+ file_ext->writing_state = HECI_WRITE_COMPLETE;
+ if ((&file_ext->tx_wait) &&
+ waitqueue_active(&file_ext->tx_wait))
+ wake_up_interruptible(&file_ext->tx_wait);
+
+ } else if (priv_cb_pos->major_file_operations == HECI_READ
+ && HECI_READING == file_ext->reading_state) {
+ DBG("completing read call back information= %lu\n",
+ priv_cb_pos->information);
+ file_ext->reading_state = HECI_READ_COMPLETE;
+ if ((&file_ext->rx_wait) &&
+ waitqueue_active(&file_ext->rx_wait))
+ wake_up_interruptible(&file_ext->rx_wait);
+
+ }
+}
+
+/**
+ * _heci_cmpl_iamthif - process completed iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @priv_cb_pos: callback block.
+ */
+static void _heci_cmpl_iamthif(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (dev->iamthif_canceled != 1) {
+ dev->iamthif_state = HECI_IAMTHIF_READ_COMPLETE;
+ dev->iamthif_stall_timer = 0;
+ memcpy(priv_cb_pos->response_buffer.data,
+ dev->iamthif_msg_buf,
+ dev->iamthif_msg_buf_index);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->pthi_read_complete_list.heci_cb.cb_list);
+ DBG("pthi read completed.\n");
+ } else {
+ run_next_iamthif_cmd(dev);
+ }
+ if (&dev->iamthif_file_ext.wait) {
+ DBG("completing pthi call back.\n");
+ wake_up_interruptible(&dev->iamthif_file_ext.wait);
+ }
+}
+/**
+ * heci_bh_handler - function called after ISR to handle the interrupt
+ * processing.
+ *
+ * @work: pointer to the work structure
+ *
+ * NOTE: This function is called by schedule work
+ */
+static void heci_bh_handler(struct work_struct *work)
+{
+ struct iamt_heci_device *dev =
+ container_of(work, struct iamt_heci_device, work);
+ struct io_heci_list complete_list;
+ __s32 slots;
+ int rets;
+ struct heci_cb_private *cb_pos = NULL, *cb_next = NULL;
+ struct heci_file_private *file_ext;
+ int bus_message_received = 0;
+ struct task_struct *tsk;
+
+ DBG("function called after ISR to handle the interrupt processing.\n");
+ /* initialize our complete list */
+ spin_lock_bh(&dev->device_lock);
+ heci_initialize_list(&complete_list, dev);
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ /* check if ME wants a reset */
+ if (((dev->me_hw_state & ME_RDY_HRA) == 0)
+ && (dev->heci_state != HECI_RESETING)
+ && (dev->heci_state != HECI_INITIALIZING)) {
+ DBG("FW not ready.\n");
+ heci_reset(dev, 1);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ /* check if we need to start the dev */
+ if ((dev->host_hw_state & H_RDY) == 0) {
+ if ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA) {
+ DBG("we need to start the dev.\n");
+ dev->host_hw_state |= (H_IE | H_IG | H_RDY);
+ heci_set_csr_register(dev);
+ if (dev->heci_state == HECI_INITIALIZING) {
+ dev->recvd_msg = 1;
+ spin_unlock_bh(&dev->device_lock);
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ return;
+
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ tsk = kthread_run(heci_task_initialize_clients,
+ dev, "heci_reinit");
+ if (IS_ERR(tsk)) {
+ int rc = PTR_ERR(tsk);
+ printk(KERN_WARNING "heci: Unable to"
+ "start the heci thread: %d\n", rc);
+ }
+ return;
+ }
+ } else {
+ DBG("enable interrupt FW not ready.\n");
+ heci_csr_enable_interrupts(dev);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ }
+ /* check slots avalable for reading */
+ slots = count_full_read_slots(dev);
+ DBG("slots =%08x extra_write_index =%08x.\n",
+ slots, dev->extra_write_index);
+ while ((slots > 0) && (!dev->extra_write_index)) {
+ DBG("slots =%08x extra_write_index =%08x.\n", slots,
+ dev->extra_write_index);
+ DBG("call heci_bh_read_handler.\n");
+ rets = heci_bh_read_handler(&complete_list, dev, &slots);
+ if (rets != 0)
+ goto end;
+ }
+ rets = heci_bh_write_handler(&complete_list, dev, &slots);
+end:
+ DBG("end of bottom half function.\n");
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ /* acknowledge interrupt and disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ PREPARE_WORK(&dev->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler.\n");
+ rets = schedule_work(&dev->work);
+ if (!rets) {
+ printk(KERN_ERR "heci: schedule the heci_bh_handler"
+ " failed error=%x\n", rets);
+ }
+ } else {
+ heci_csr_enable_interrupts(dev);
+ }
+
+ if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) {
+ DBG("received waiting bus message\n");
+ bus_message_received = 1;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ if (bus_message_received) {
+ DBG("wake up dev->wait_recvd_msg\n");
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ bus_message_received = 0;
+ }
+ if ((complete_list.status != 0)
+ || list_empty(&complete_list.heci_cb.cb_list))
+ return;
+
+
+ list_for_each_entry_safe(cb_pos, cb_next,
+ &complete_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)cb_pos->file_private;
+ list_del(&cb_pos->cb_list);
+ if (file_ext != NULL) {
+ if (file_ext != &dev->iamthif_file_ext) {
+ DBG("completing call back.\n");
+ _heci_cmpl(file_ext, cb_pos);
+ cb_pos = NULL;
+ } else if (file_ext == &dev->iamthif_file_ext) {
+ _heci_cmpl_iamthif(dev, cb_pos);
+ }
+ }
+ }
+}
+
+
+/**
+ * heci_bh_read_handler - bottom half read routine after ISR to
+ * handle the read processing.
+ *
+ * @cmpl_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @slots: slots to read.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+ struct heci_msg_hdr *heci_hdr;
+ int ret = 0;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (!dev->rd_msg_hdr) {
+ dev->rd_msg_hdr = read_heci_register(dev, ME_CB_RW);
+ DBG("slots=%08x.\n", *slots);
+ (*slots)--;
+ DBG("slots=%08x.\n", *slots);
+ }
+ heci_hdr = (struct heci_msg_hdr *) &dev->rd_msg_hdr;
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+
+ if ((heci_hdr->reserved) || !(dev->rd_msg_hdr)) {
+ DBG("corrupted message header.\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+
+ if ((heci_hdr->host_addr) || (heci_hdr->me_addr)) {
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe read host"
+ " client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ if ((file_pos->host_client_id == heci_hdr->host_addr)
+ && (file_pos->me_client_id == heci_hdr->me_addr))
+ break;
+ }
+
+ if (&file_pos->link == &dev->file_list) {
+ DBG("corrupted message header\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+ }
+ if (((*slots) * sizeof(__u32)) < heci_hdr->length) {
+ DBG("we can't read the message slots=%08x.\n", *slots);
+ /* we can't read the message */
+ ret = -ERANGE;
+ goto end;
+ }
+
+ /* decide where to read the message too */
+ if (!heci_hdr->host_addr) {
+ DBG("call heci_bh_read_bus_message.\n");
+ heci_bh_read_bus_message(dev, heci_hdr);
+ DBG("end heci_bh_read_bus_message.\n");
+ } else if ((heci_hdr->host_addr == dev->iamthif_file_ext.host_client_id)
+ && (HECI_FILE_CONNECTED == dev->iamthif_file_ext.state)
+ && (dev->iamthif_state == HECI_IAMTHIF_READING)) {
+ DBG("call heci_bh_read_iamthif_message.\n");
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ ret = heci_bh_read_pthi_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ } else {
+ DBG("call heci_bh_read_client_message.\n");
+ ret = heci_bh_read_client_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ }
+
+ /* reset the number of slots and header */
+ *slots = count_full_read_slots(dev);
+ dev->rd_msg_hdr = 0;
+
+ if (*slots == -ESLOTS_OVERFLOW) {
+ /* overflow - reset */
+ DBG("reseting due to slots overflow.\n");
+ /* set the event since message has been read */
+ ret = -ERANGE;
+ goto end;
+ }
+end:
+ return ret;
+}
+
+
+/**
+ * heci_bh_read_bus_message - bottom half read routine after ISR to
+ * handle the read bus message cmd processing.
+ *
+ * @dev: Device object for our driver
+ * @heci_hdr: header of bus message
+ */
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_bus_message *heci_msg;
+ struct hbm_host_version_response *version_res;
+ struct hbm_client_connect_response *connect_res;
+ struct hbm_client_connect_response *disconnect_res;
+ struct hbm_flow_control *flow_control;
+ struct hbm_props_response *props_res;
+ struct hbm_host_enum_response *enum_res;
+ struct hbm_client_disconnect_request *disconnect_req;
+ struct hbm_host_stop_request *h_stop_req;
+ int i;
+ unsigned char *buffer;
+
+ /* read the message to our buffer */
+ buffer = (unsigned char *) dev->rd_msg_buf;
+ BUG_ON(heci_hdr->length >= sizeof(dev->rd_msg_buf));
+ heci_read_slots(dev, buffer, heci_hdr->length);
+ heci_msg = (struct heci_bus_message *) buffer;
+
+ switch (*(__u8 *) heci_msg) {
+ case HOST_START_RES_CMD:
+ version_res = (struct hbm_host_version_response *) heci_msg;
+ if (version_res->host_version_supported) {
+ dev->version.major_version = HBM_MAJOR_VERSION;
+ dev->version.minor_version = HBM_MINOR_VERSION;
+ } else {
+ dev->version = version_res->me_max_version;
+ }
+ dev->recvd_msg = 1;
+ DBG("host start response message received.\n");
+ break;
+
+ case CLIENT_CONNECT_RES_CMD:
+ connect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_connect_response(dev, connect_res);
+ DBG("client connect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case CLIENT_DISCONNECT_RES_CMD:
+ disconnect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_disconnect_response(dev, disconnect_res);
+ DBG("client disconnect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case HECI_FLOW_CONTROL_CMD:
+ flow_control = (struct hbm_flow_control *) heci_msg;
+ heci_client_flow_control_response(dev, flow_control);
+ DBG("client flow control response message received.\n");
+ break;
+
+ case HOST_CLIENT_PROPERTEIS_RES_CMD:
+ props_res = (struct hbm_props_response *) heci_msg;
+ if (props_res->status != 0) {
+ BUG();
+ break;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ props_res->address) {
+ dev->me_clients[i].props =
+ props_res->client_properties;
+ break;
+ }
+
+ }
+ dev->recvd_msg = 1;
+ break;
+
+ case HOST_ENUM_RES_CMD:
+ enum_res = (struct hbm_host_enum_response *) heci_msg;
+ memcpy(dev->heci_me_clients, enum_res->valid_addresses, 32);
+ dev->recvd_msg = 1;
+ break;
+
+ case HOST_STOP_RES_CMD:
+ dev->heci_state = HECI_DISABLED;
+ DBG("reseting because of FW stop response.\n");
+ heci_reset(dev, 1);
+ break;
+
+ case CLIENT_DISCONNECT_REQ_CMD:
+ /* search for client */
+ disconnect_req =
+ (struct hbm_client_disconnect_request *) heci_msg;
+ heci_client_disconnect_request(dev, disconnect_req);
+ break;
+
+ case ME_STOP_REQ_CMD:
+ /* prepare stop request */
+ heci_hdr = (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ h_stop_req =
+ (struct hbm_host_stop_request *) &dev->ext_msg_buf[1];
+ memset(h_stop_req, 0, sizeof(struct hbm_host_stop_request));
+ h_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ h_stop_req->reason = DRIVER_STOP_REQUEST;
+ h_stop_req->reserved[0] = 0;
+ h_stop_req->reserved[1] = 0;
+ dev->extra_write_index = 2;
+ break;
+
+ default:
+ BUG();
+ break;
+
+ }
+}
+
+/**
+ * heci_bh_read_pthi_message - bottom half read routine after ISR to
+ * handle the read pthi message data processing.
+ *
+ * @complete_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @heci_hdr: header of pthi message
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb;
+ unsigned char *buffer;
+
+ BUG_ON(heci_hdr->me_addr != dev->iamthif_file_ext.me_client_id);
+ BUG_ON(dev->iamthif_state != HECI_IAMTHIF_READING);
+
+ buffer = (unsigned char *) (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index);
+ BUG_ON(sizeof(dev->iamthif_msg_buf) <
+ (dev->iamthif_msg_buf_index + heci_hdr->length));
+
+ heci_read_slots(dev, buffer, heci_hdr->length);
+
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+
+ if (!(heci_hdr->msg_complete))
+ return 0;
+
+ DBG("pthi_message_buffer_index=%d\n", heci_hdr->length);
+ DBG("completed pthi read.\n ");
+ if (!dev->iamthif_current_cb)
+ return -ENODEV;
+
+ priv_cb = dev->iamthif_current_cb;
+ dev->iamthif_current_cb = NULL;
+
+ file_ext = (struct heci_file_private *)priv_cb->file_private;
+ if (!file_ext)
+ return -ENODEV;
+
+ dev->iamthif_stall_timer = 0;
+ priv_cb->information = dev->iamthif_msg_buf_index;
+ priv_cb->read_time = get_seconds();
+ if ((dev->iamthif_ioctl) && (file_ext == &dev->iamthif_file_ext)) {
+ /* found the iamthif cb */
+ DBG("complete the pthi read cb.\n ");
+ if (&dev->iamthif_file_ext) {
+ DBG("add the pthi read cb to complete.\n ");
+ list_add_tail(&priv_cb->cb_list,
+ &complete_list->heci_cb.cb_list);
+ }
+ }
+ return 0;
+}
+
+/**
+ * _heci_bh_state_ok - check if heci header matches file private data
+ *
+ * @file_ext: private data of the file object
+ * @heci_hdr: header of heci client message
+ *
+ * returns !=0 if matches, 0 if no match.
+ */
+static int _heci_bh_state_ok(struct heci_file_private *file_ext,
+ struct heci_msg_hdr *heci_hdr)
+{
+ return ((file_ext->host_client_id == heci_hdr->host_addr)
+ && (file_ext->me_client_id == heci_hdr->me_addr)
+ && (file_ext->state == HECI_FILE_CONNECTED)
+ && (HECI_READ_COMPLETE != file_ext->reading_state));
+}
+
+/**
+ * heci_bh_read_client_message - bottom half read routine after ISR to
+ * handle the read heci client message data processing.
+ *
+ * @complete_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @heci_hdr: header of heci client message
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ unsigned char *buffer = NULL;
+
+ DBG("start client msg\n");
+ if (!((dev->read_list.status == 0) &&
+ !list_empty(&dev->read_list.heci_cb.cb_list)))
+ goto quit;
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if ((file_ext != NULL) &&
+ (_heci_bh_state_ok(file_ext, heci_hdr))) {
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_READING;
+ buffer = (unsigned char *)
+ (priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information);
+ BUG_ON(priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information);
+
+ if (priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information) {
+ DBG("message overflow.\n");
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENOMEM;
+ }
+ if (buffer) {
+ heci_read_slots(dev, buffer,
+ heci_hdr->length);
+ }
+ priv_cb_pos->information += heci_hdr->length;
+ if (heci_hdr->msg_complete) {
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ DBG("completed read host client = %d,"
+ "ME client = %d, "
+ "data length = %lu\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id,
+ priv_cb_pos->information);
+
+ *(priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information) = '\0';
+ DBG("priv_cb_pos->res_buffer - %s\n",
+ priv_cb_pos->response_buffer.data);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &complete_list->heci_cb.cb_list);
+ } else {
+ spin_unlock(&file_ext->read_io_lock);
+ }
+
+ break;
+ }
+
+ }
+
+quit:
+ DBG("message read\n");
+ if (!buffer) {
+ heci_read_slots(dev, (unsigned char *) dev->rd_msg_buf,
+ heci_hdr->length);
+ DBG("discarding message, header=%08x.\n",
+ *(__u32 *) dev->rd_msg_buf);
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_iamthif_read - prepare to read iamthif data.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_iamthif_read(struct iamt_heci_device *dev, __s32 *slots)
+{
+
+ if (((*slots) * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr)
+ + sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, &dev->iamthif_file_ext)) {
+ DBG("iamthif flow control failed\n");
+ } else {
+ DBG("iamthif flow control success\n");
+ dev->iamthif_state = HECI_IAMTHIF_READING;
+ dev->iamthif_flow_control_pending = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_stall_timer = IAMTHIF_STALL_TIMER;
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+ }
+ return 0;
+ } else {
+ return -ECOMPLETE_MESSAGE;
+ }
+}
+
+/**
+ * _heci_bh_close - process close related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_close(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request) + 3) / 4;
+
+ if (!heci_disconnect(dev, file_ext)) {
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_hb_close - process read related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_read(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+
+/**
+ * _heci_bh_ioctl - process ioctl related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_ioctl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request))) {
+ file_ext->state = HECI_FILE_CONNECTING;
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request) + 3) / 4;
+ if (!heci_connect(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl - process completed and no-iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ (priv_cb_pos->request_buffer.size -
+ priv_cb_pos->information))) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = ((priv_cb_pos->request_buffer.size) -
+ (priv_cb_pos->information));
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ "heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n",
+ heci_hdr->length);
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ file_ext->status = 0;
+ priv_cb_pos->information += heci_hdr->length;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ (*slots) -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ priv_cb_pos->information += heci_hdr->length;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ " heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl_iamthif - process completed iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl_iamthif(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ dev->iamthif_msg_buf_size -
+ dev->iamthif_msg_buf_index)) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = dev->iamthif_msg_buf_size -
+ dev->iamthif_msg_buf_index;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index),
+ heci_hdr->length)) {
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+ priv_cb_pos->information = dev->iamthif_msg_buf_index;
+ file_ext->status = 0;
+ dev->iamthif_state = HECI_IAMTHIF_FLOW_CONTROL;
+ dev->iamthif_flow_control_pending = 1;
+ /* save iamthif cb sent to pthi client */
+ dev->iamthif_current_cb = priv_cb_pos;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ } else {
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * heci_bh_write_handler - bottom half write routine after
+ * ISR to handle the write processing.
+ *
+ * @cmpl_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @slots: slots to write.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_write_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ struct io_heci_list *list;
+ int ret;
+
+ if (!host_buffer_is_empty(dev)) {
+ DBG("host buffer is not empty.\n");
+ return 0;
+ }
+ dev->write_hang = -1;
+ *slots = count_empty_write_slots(dev);
+ /* complete all waiting for write CB */
+ DBG("complete all waiting for write cb.\n");
+
+ list = &dev->write_waiting_list;
+ if ((list->status == 0)
+ && !list_empty(&list->heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &list->heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext != NULL) {
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ if ((HECI_WRITING == file_ext->writing_state) &&
+ (priv_cb_pos->major_file_operations ==
+ HECI_WRITING) &&
+ (file_ext != &dev->iamthif_file_ext)) {
+ DBG("HECI WRITE COMPLETE\n");
+ file_ext->writing_state =
+ HECI_WRITE_COMPLETE;
+ list_add_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ }
+ if (file_ext == &dev->iamthif_file_ext) {
+ DBG("check iamthif flow control.\n");
+ if (dev->iamthif_flow_control_pending) {
+ ret = _heci_bh_iamthif_read(dev,
+ slots);
+ if (ret != 0)
+ return ret;
+ }
+ }
+ }
+
+ }
+ }
+
+ if ((dev->stop) && (!dev->wd_pending)) {
+ dev->wd_stoped = 1;
+ wake_up_interruptible(&dev->wait_stop_wd);
+ return 0;
+ }
+
+ if (dev->extra_write_index != 0) {
+ DBG("extra_write_index =%d.\n", dev->extra_write_index);
+ heci_write_message(dev,
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0],
+ (unsigned char *) &dev->ext_msg_buf[1],
+ (dev->extra_write_index - 1) * sizeof(__u32));
+ *slots -= dev->extra_write_index;
+ dev->extra_write_index = 0;
+ }
+ if (dev->heci_state == HECI_ENABLED) {
+ if ((dev->wd_pending)
+ && flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ if (!heci_send_wd(dev))
+ DBG("wd send failed.\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+
+ if (dev->wd_timeout != 0) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_START_WD_DATA_SIZE + 3) / 4;
+ dev->wd_due_counter = 2;
+ } else {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_WD_PARAMS_SIZE + 3) / 4;
+ dev->wd_due_counter = 0;
+ }
+
+ }
+ }
+ if (dev->stop)
+ return ~ENODEV;
+
+ /* complete control write list CB */
+ if (dev->ctrl_wr_list.status == 0) {
+ /* complete control write list CB */
+ DBG("complete control write list cb.\n");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_wr_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ }
+ switch (priv_cb_pos->major_file_operations) {
+ case HECI_CLOSE:
+ /* send disconnect message */
+ ret = _heci_bh_close(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_READ:
+ /* send flow control message */
+ ret = _heci_bh_read(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_IOCTL:
+ /* connect message */
+ if (!other_client_is_connecting(dev, file_ext))
+ continue;
+ ret = _heci_bh_ioctl(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+
+ default:
+ BUG();
+ }
+
+ }
+ }
+ /* complete write list CB */
+ if ((dev->write_list.status == 0)
+ && !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ DBG("complete write list cb.\n");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (file_ext != NULL) {
+ if (file_ext != &dev->iamthif_file_ext) {
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control"
+ " credentials for client"
+ " %d, not sending.\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl(dev, slots,
+ priv_cb_pos,
+ file_ext,
+ cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ } else if (file_ext == &dev->iamthif_file_ext) {
+ /* IAMTHIF IOCTL */
+ DBG("complete pthi write cb.\n");
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control"
+ " credentials for pthi"
+ " client %d.\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl_iamthif(dev, slots,
+ priv_cb_pos,
+ file_ext,
+ cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ }
+ }
+
+ }
+ }
+ return 0;
+}
+
+
+/**
+ * is_treat_specially_client - check if the message belong
+ * to the file private data.
+ *
+ * @file_ext: private data of the file object
+ * @rs: connect response bus message
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int is_treat_specially_client(struct heci_file_private *file_ext,
+ struct hbm_client_connect_response *rs)
+{
+ int ret = 0;
+
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+ if (rs->status == 0) {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_CONNECTED;
+ file_ext->status = 0;
+ } else {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_DISCONNECTED;
+ file_ext->status = -ENODEV;
+ }
+ ret = 1;
+ }
+ DBG("client state = %d.\n", file_ext->state);
+ return ret;
+}
+
+/**
+ * heci_client_connect_response - connect response bh routine
+ *
+ * @dev: Device object for our driver
+ * @rs: connect response bus message
+ */
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ /* if WD or iamthif client treat specially */
+
+ if ((is_treat_specially_client(&(dev->wd_file_ext), rs)) ||
+ (is_treat_specially_client(&(dev->iamthif_file_ext), rs)))
+ return;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+ if (HECI_IOCTL == priv_cb_pos->major_file_operations) {
+ if (is_treat_specially_client(file_ext, rs)) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+ }
+}
+
+/**
+ * heci_client_disconnect_response - disconnect response bh routine
+ *
+ * @dev: Device object for our driver
+ * @rs: disconnect response bus message
+ */
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+
+ DBG("list_for_each_entry_safe in ctrl_rd_list.\n");
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+
+ list_del(&priv_cb_pos->cb_list);
+ if (rs->status == 0) {
+ file_ext->state =
+ HECI_FILE_DISCONNECTED;
+ }
+
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_flow_addr - tell they have same address.
+ *
+ * @file: private data of the file object.
+ * @flow: flow control.
+ *
+ * returns !=0, same; 0,not.
+ */
+static int same_flow_addr(struct heci_file_private *file,
+ struct hbm_flow_control *flow)
+{
+ return ((file->host_client_id == flow->host_addr)
+ && (file->me_client_id == flow->me_addr));
+}
+
+/**
+ * add_single_flow_creds - add single buffer credentials.
+ *
+ * @file: private data ot the file object.
+ * @flow: flow control.
+ */
+static void add_single_flow_creds(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow)
+{
+ struct heci_me_client *client;
+ int i;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ client = &dev->me_clients[i];
+ if ((client != NULL) &&
+ (flow->me_addr == client->client_id)) {
+ if (client->props.single_recv_buf != 0) {
+ client->flow_ctrl_creds++;
+ DBG("recv flow ctrl msg ME %d (single).\n",
+ flow->me_addr);
+ DBG("flow control credentials=%d.\n",
+ client->flow_ctrl_creds);
+ } else {
+ BUG(); /* error in flow control */
+ }
+ }
+ }
+}
+
+/**
+ * heci_client_flow_control_response - flow control response bh routine
+ *
+ * @dev: Device object for our driver
+ * @flow_control: flow control response bus message
+ */
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (flow_control->host_addr == 0) {
+ /* single receive buffer */
+ add_single_flow_creds(dev, flow_control);
+ } else {
+ /* normal connection */
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe in file_list\n");
+
+ DBG("file_ext of host client %d ME client %d.\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ DBG("flow ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ if (same_flow_addr(file_pos, flow_control)) {
+ DBG("recv ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ file_pos->flow_ctrl_creds++;
+ DBG("flow control credentials=%d.\n",
+ file_pos->flow_ctrl_creds);
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_disconn_addr - tell they have same address
+ *
+ * @file: private data of the file object.
+ * @disconn: disconnection request.
+ *
+ * returns !=0, same; 0,not.
+ */
+static int same_disconn_addr(struct heci_file_private *file,
+ struct hbm_client_disconnect_request *disconn)
+{
+ return ((file->host_client_id == disconn->host_addr)
+ && (file->me_client_id == disconn->me_addr));
+}
+
+/**
+ * heci_client_disconnect_request - disconnect request bh routine
+ *
+ * @dev: Device object for our driver.
+ * @disconnect_req: disconnect request bus message.
+ */
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_response *disconnect_res;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (same_disconn_addr(file_pos, disconnect_req)) {
+ DBG("disconnect request host client %d ME client %d.\n",
+ disconnect_req->host_addr,
+ disconnect_req->me_addr);
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->timer_count = 0;
+ if (file_pos == &dev->wd_file_ext) {
+ dev->wd_due_counter = 0;
+ dev->wd_pending = 0;
+ } else if (file_pos == &dev->iamthif_file_ext)
+ dev->iamthif_timer = 0;
+
+ /* prepare disconnect response */
+ heci_hdr =
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length =
+ sizeof(struct hbm_client_connect_response);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ disconnect_res =
+ (struct hbm_client_connect_response *)
+ &dev->ext_msg_buf[1];
+ disconnect_res->host_addr = file_pos->host_client_id;
+ disconnect_res->me_addr = file_pos->me_client_id;
+ *(__u8 *) (&disconnect_res->cmd) =
+ CLIENT_DISCONNECT_RES_CMD;
+ disconnect_res->status = 0;
+ dev->extra_write_index = 2;
+ break;
+ }
+ }
+}
+
+/**
+ * heci_timer - timer function.
+ *
+ * @data: pointer to the device structure
+ *
+ * NOTE: This function is called by timer interrupt work
+ */
+void heci_wd_timer(unsigned long data)
+{
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ DBG("send watchdog.\n");
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ /* Watchdog */
+ if ((dev->wd_due_counter != 0) && (dev->wd_bypass == 0)) {
+ if (--dev->wd_due_counter == 0) {
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_wd(dev)) {
+ DBG("wd send failed.\n");
+ } else {
+ flow_ctrl_reduce(dev,
+ &dev->wd_file_ext);
+ }
+
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 2;
+ else
+ dev->wd_due_counter = 0;
+
+ } else
+ dev->wd_pending = 1;
+
+ }
+ }
+ if (dev->iamthif_stall_timer != 0) {
+ if (--dev->iamthif_stall_timer == 0) {
+ DBG("reseting because of hang to PTHI.\n");
+ heci_reset(dev, 1);
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->iamthif_current_cb)
+ heci_free_cb_private(dev->iamthif_current_cb);
+
+ spin_lock_bh(&dev->device_lock);
+ dev->iamthif_file_object = NULL;
+ dev->iamthif_current_cb = NULL;
+ run_next_iamthif_cmd(dev);
+ }
+ }
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+}
diff --git a/drivers/char/heci/io_heci.c b/drivers/char/heci/io_heci.c
new file mode 100644
index 0000000..3fc1bb5
--- /dev/null
+++ b/drivers/char/heci/io_heci.c
@@ -0,0 +1,847 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/list.h>
+#include <linux/unistd.h>
+#include <linux/delay.h>
+
+#include "heci_data_structures.h"
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+/**
+ * heci_ioctl_get_version - the get driver version IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @*u_msg: pointer to user data struct in user space
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ struct heci_driver_version *version;
+ struct heci_message_data res_msg;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev)
+ || (!file_ext))
+ return -ENODEV;
+
+ if (k_msg.size < (sizeof(struct heci_driver_version) - 2)) {
+ DBG("user buffer less than heci_driver_version.\n");
+ return -EMSGSIZE;
+ }
+
+ res_msg.data = kmalloc(sizeof(struct heci_driver_version), GFP_KERNEL);
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_driver_version));
+ return -ENOMEM;
+ }
+
+ version = (struct heci_driver_version *) res_msg.data;
+ version->major = MAJOR_VERSION;
+ version->minor = MINOR_VERSION;
+ version->hotfix = QUICK_FIX_NUMBER;
+ version->build = VER_BUILD;
+ res_msg.size = sizeof(struct heci_driver_version);
+ if (k_msg.size < sizeof(struct heci_driver_version))
+ res_msg.size -= 2;
+
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+end:
+ kfree(res_msg.data);
+ return rets;
+}
+
+/**
+ * heci_ioctl_connect_client - the connect to fw client IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @*u_msg: pointer to user data struct in user space
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file)
+{
+ int rets = 0;
+ struct heci_message_data req_msg, res_msg;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_client *client;
+ struct heci_file_private *file_ext;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ long timeout = 15; /*15 second */
+ __u8 i;
+ int err = 0;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file))
+ return -ENODEV;
+
+ file_ext = file->private_data;
+ if (!file_ext)
+ return -ENODEV;
+
+ if (k_msg.size != sizeof(struct guid)) {
+ DBG("user buffer size is not equal to size of struct "
+ "guid(16).\n");
+ return -EMSGSIZE;
+ }
+
+ if (!k_msg.data)
+ return -EIO;
+
+ req_msg.data = kmalloc(sizeof(struct guid), GFP_KERNEL);
+ res_msg.data = kmalloc(sizeof(struct heci_client), GFP_KERNEL);
+
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_client));
+ kfree(req_msg.data);
+ return -ENOMEM;
+ }
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ (int) sizeof(struct guid));
+ kfree(res_msg.data);
+ return -ENOMEM;
+ }
+ req_msg.size = sizeof(struct guid);
+ res_msg.size = sizeof(struct heci_client);
+
+ /* copy the message to kernel space -
+ * use a pointer already copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, k_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ /* buffered ioctl cb */
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb) {
+ rets = -ENOMEM;
+ goto end;
+ }
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->response_buffer.data = res_msg.data;
+ priv_cb->response_buffer.size = res_msg.size;
+ priv_cb->request_buffer.data = req_msg.data;
+ priv_cb->request_buffer.size = req_msg.size;
+ priv_cb->major_file_operations = HECI_IOCTL;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if ((file_ext->state != HECI_FILE_INITIALIZING) &&
+ (file_ext->state != HECI_FILE_DISCONNECTED)) {
+ rets = -EBUSY;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ /* find ME client we're trying to connect to */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp((struct guid *)req_msg.data,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (dev->me_clients[i].props.fixed_address == 0) {
+ file_ext->me_client_id =
+ dev->me_clients[i].client_id;
+ file_ext->state = HECI_FILE_CONNECTING;
+ }
+ break;
+ }
+ }
+ /* if we're connecting to PTHI client so we will use the exist
+ * connection
+ */
+ if (memcmp((struct guid *)req_msg.data, &heci_pthi_guid,
+ sizeof(struct guid)) == 0) {
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ if (heci_fe_same_id(file_ext, file_pos)) {
+ DBG("remove file private data node host"
+ " client = %d, ME client = %d.\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del(&file_pos->link);
+ }
+
+ }
+ DBG("free file private data memory.\n");
+ kfree(file_ext);
+ file_ext = NULL;
+ file->private_data = &dev->iamthif_file_ext;
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length =
+ dev->me_clients[i].props.max_msg_length;
+ client->protocol_version =
+ dev->me_clients[i].props.protocol_version;
+ rets = dev->iamthif_file_ext.status;
+ spin_unlock_bh(&dev->device_lock);
+
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ }
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state != HECI_FILE_CONNECTING) {
+ rets = -ENODEV;
+ spin_unlock(&file_ext->file_lock);
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ spin_unlock(&file_ext->file_lock);
+ /* prepare the output buffer */
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length = dev->me_clients[i].props.max_msg_length;
+ client->protocol_version = dev->me_clients[i].props.protocol_version;
+ if (dev->host_buffer_is_empty
+ && !other_client_is_connecting(dev, file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_connect(dev, file_ext)) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ } else {
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ priv_cb->file_private = file_ext;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.
+ cb_list);
+ }
+
+
+ } else {
+ priv_cb->file_private = file_ext;
+ DBG("add connect cb to control write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+
+ if (HECI_FILE_CONNECTED == file_ext->state) {
+ DBG("successfully connected to FW client.\n");
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ } else {
+ DBG("failed to connect to FW client.file_ext->state = %d.\n",
+ file_ext->state);
+ if (!err) {
+ DBG("wait_event_interruptible_timeout failed on client"
+ " connect message fw response message.\n");
+ }
+ rets = -EFAULT;
+ goto remove_list;
+ }
+
+remove_list:
+ if (priv_cb) {
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_list(&dev->ctrl_rd_list, file_ext);
+ heci_flush_list(&dev->ctrl_wr_list, file_ext);
+ spin_unlock_bh(&dev->device_lock);
+ }
+end:
+ DBG("free connect cb memory.");
+ kfree(req_msg.data);
+ kfree(res_msg.data);
+ kfree(priv_cb);
+ return rets;
+}
+
+/**
+ * heci_ioctl_wd - the wd IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ struct heci_message_data req_msg; /*in kernel on the stack */
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size != HECI_WATCHDOG_DATA_SIZE) {
+ DBG("user buffer has invalid size.\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+
+ req_msg.data = kmalloc(HECI_WATCHDOG_DATA_SIZE, GFP_KERNEL);
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ HECI_WATCHDOG_DATA_SIZE);
+ return -ENOMEM;
+ }
+ req_msg.size = HECI_WATCHDOG_DATA_SIZE;
+
+ /* copy the message to kernel space - use a pointer already
+ * copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, req_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if (!dev->asf_mode) {
+ rets = -EIO;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ memcpy(&dev->wd_data[HECI_WD_PARAMS_SIZE], req_msg.data,
+ HECI_WATCHDOG_DATA_SIZE);
+
+ dev->wd_timeout = (req_msg.data[1] << 8) + req_msg.data[0];
+ dev->wd_pending = 0;
+ dev->wd_due_counter = 1; /* next timer */
+ if (dev->wd_timeout == 0) {
+ memcpy(dev->wd_data, &stop_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ } else {
+ memcpy(dev->wd_data, &start_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ mod_timer(&dev->wd_timer, jiffies);
+ }
+ spin_unlock_bh(&dev->device_lock);
+end:
+ kfree(req_msg.data);
+ return rets;
+}
+
+
+/**
+ * heci_ioctl_bypass_wd - the bypass_wd IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_bypass_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ __u8 flag = 0;
+ int rets = 0;
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size < 1) {
+ DBG("user buffer less than HECI_WATCHDOG_DATA_SIZE.\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+ if (copy_from_user(&flag, k_msg.data, 1)) {
+ rets = -EFAULT;
+ goto end;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ flag = flag ? (1) : (0);
+ dev->wd_bypass = flag;
+ spin_unlock_bh(&dev->device_lock);
+end:
+ return rets;
+}
+
+/**
+ * find_pthi_read_list_entry - finds a PTHIlist entry for current file
+ *
+ * @dev: Device object for our driver
+ * @file: pointer to file object
+ *
+ * returns returned a list entry on success, NULL on failure.
+ */
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct file *file)
+{
+ struct heci_file_private *file_ext_temp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if ((dev->pthi_read_complete_list.status == 0) &&
+ !list_empty(&dev->pthi_read_complete_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_read_complete_list.heci_cb.cb_list, cb_list) {
+ file_ext_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if ((file_ext_temp != NULL) &&
+ (file_ext_temp == &dev->iamthif_file_ext) &&
+ (priv_cb_pos->file_object == file))
+ return priv_cb_pos;
+ }
+ }
+ return NULL;
+}
+
+/**
+ * pthi_read - read data from pthi client
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @file: pointer to file object
+ * @*ubuf: pointer to user data in user space
+ * @length: data length to read
+ * @offset: data read offset
+ *
+ * returns
+ * returned data length on success,
+ * zero if no data to read,
+ * negative on failure.
+ */
+int pthi_read(struct iamt_heci_device *dev, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset)
+{
+ int rets = 0;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_file_private *file_ext = file->private_data;
+ __u8 i;
+ unsigned long currtime = get_seconds();
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ if ((file_ext == NULL) || (file_ext != &dev->iamthif_file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->iamthif_file_ext.me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients)
+ || (dev->me_clients[i].client_id !=
+ dev->iamthif_file_ext.me_client_id)) {
+ DBG("PTHI client not found.\n");
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ priv_cb = find_pthi_read_list_entry(dev, file);
+ if (!priv_cb) {
+ spin_unlock_bh(&dev->device_lock);
+ return 0; /* No more data to read */
+ } else {
+ if (priv_cb &&
+ (currtime - priv_cb->read_time > IAMTHIF_READ_TIMER)) {
+ /* 15 sec for the message has expired */
+ list_del(&priv_cb->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ETIMEDOUT;
+ goto free;
+ }
+ /* if the whole message will fit remove it from the list */
+ if ((priv_cb->information >= *offset) &&
+ (length >= (priv_cb->information - *offset)))
+ list_del(&priv_cb->cb_list);
+ else if ((priv_cb->information > 0) &&
+ (priv_cb->information <= *offset)) {
+ /* end of the message has been reached */
+ list_del(&priv_cb->cb_list);
+ rets = 0;
+ spin_unlock_bh(&dev->device_lock);
+ goto free;
+ }
+ /* else means that not full buffer will be read and do not
+ * remove message from deletion list
+ */
+ }
+ DBG("pthi priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("pthi priv_cb->information - %lu\n",
+ priv_cb->information);
+ spin_unlock_bh(&dev->device_lock);
+
+ /* length is being turncated to PAGE_SIZE, however,
+ * the information may be longer */
+ length = length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset);
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length))
+ rets = -EFAULT;
+ else {
+ rets = length;
+ if ((*offset + length) < priv_cb->information) {
+ *offset += length;
+ goto out;
+ }
+ }
+free:
+ DBG("free pthi cb memory.\n");
+ *offset = 0;
+ heci_free_cb_private(priv_cb);
+out:
+ return rets;
+}
+
+/**
+ * heci_start_read - the start read client message function.
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_start_read(struct iamt_heci_device *dev, int if_num,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ __u8 i;
+ struct heci_cb_private *priv_cb = NULL;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext)) {
+ DBG("received wrong function input param.\n");
+ return -ENODEV;
+ }
+ if (file_ext->state != HECI_FILE_CONNECTED)
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ DBG("check if read is pending.\n");
+ if ((file_ext->read_pending) || (file_ext->read_cb != NULL)) {
+ DBG("read is pending.\n");
+ return -EBUSY;
+ }
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ DBG("allocation call back success\n"
+ "host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id)
+ break;
+
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if (i == dev->num_heci_me_clients) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+
+ priv_cb->response_buffer.size = dev->me_clients[i].props.max_msg_length;
+ spin_unlock_bh(&dev->device_lock);
+ priv_cb->response_buffer.data =
+ kmalloc(priv_cb->response_buffer.size, GFP_KERNEL);
+ if (!priv_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ DBG("allocation call back data success.\n");
+ priv_cb->major_file_operations = HECI_READ;
+ /* make sure information is zero before we start */
+ priv_cb->information = 0;
+ priv_cb->file_private = (void *) file_ext;
+ file_ext->read_cb = priv_cb;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ rets = -ENODEV;
+ goto unlock;
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+unlock:
+ spin_unlock_bh(&dev->device_lock);
+fail:
+ heci_free_cb_private(priv_cb);
+ return rets;
+}
+
+/**
+ * pthi_write - write iamthif data to pthi client
+ *
+ * @dev: Device object for our driver
+ * @priv_cb: heci call back struct
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int pthi_write(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb)
+{
+ int rets = 0;
+ struct heci_msg_hdr heci_hdr;
+
+ if ((!dev) || (!priv_cb))
+ return -ENODEV;
+
+ DBG("write data to pthi client.\n");
+
+ dev->iamthif_state = HECI_IAMTHIF_WRITING;
+ dev->iamthif_current_cb = priv_cb;
+ dev->iamthif_file_object = priv_cb->file_object;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_msg_buf_size = priv_cb->request_buffer.size;
+ memcpy(dev->iamthif_msg_buf, priv_cb->request_buffer.data,
+ priv_cb->request_buffer.size);
+
+ if (flow_ctrl_creds(dev, &dev->iamthif_file_ext) &&
+ dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (priv_cb->request_buffer.size >
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr)) {
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = priv_cb->request_buffer.size;
+ heci_hdr.msg_complete = 1;
+ }
+
+ heci_hdr.host_addr = dev->iamthif_file_ext.host_client_id;
+ heci_hdr.me_addr = dev->iamthif_file_ext.me_client_id;
+ heci_hdr.reserved = 0;
+ dev->iamthif_msg_buf_index += heci_hdr.length;
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *)(dev->iamthif_msg_buf),
+ heci_hdr.length))
+ return -ENODEV;
+
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, &dev->iamthif_file_ext);
+ dev->iamthif_flow_control_pending = 1;
+ dev->iamthif_state = HECI_IAMTHIF_FLOW_CONTROL;
+ DBG("add pthi cb to write waiting list\n");
+ dev->iamthif_current_cb = priv_cb;
+ dev->iamthif_file_object = priv_cb->file_object;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ DBG("message does not complete, "
+ "so add pthi cb to write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ } else {
+ if (!(dev->host_buffer_is_empty))
+ DBG("host buffer is not empty");
+
+ DBG("No flow control credentials, "
+ "so add iamthif cb to write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return rets;
+}
+
+/**
+ * iamthif_ioctl_send_msg - send cmd data to pthi client
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+void run_next_iamthif_cmd(struct iamt_heci_device *dev)
+{
+ struct heci_file_private *file_ext_tmp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int status = 0;
+
+ if (!dev)
+ return;
+
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+ dev->iamthif_file_object = NULL;
+
+ if (dev->pthi_cmd_list.status == 0 &&
+ !list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)) {
+ DBG("complete pthi cmd_list cb.\n");
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_cmd_list.heci_cb.cb_list, cb_list) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext_tmp != NULL) &&
+ (file_ext_tmp == &dev->iamthif_file_ext)) {
+ status = pthi_write(dev, priv_cb_pos);
+ if (status != 0) {
+ DBG("pthi write failed status = %d\n",
+ status);
+ return;
+ }
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * heci_free_cb_private - free heci_cb_private related memory
+ *
+ * @priv_cb: heci callback struct
+ */
+void heci_free_cb_private(struct heci_cb_private *priv_cb)
+{
+ if (priv_cb == NULL)
+ return;
+
+ kfree(priv_cb->request_buffer.data);
+ kfree(priv_cb->response_buffer.data);
+ kfree(priv_cb);
+}
+
^ permalink raw reply related [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-07-18 11:02 ` Andi Kleen
@ 2008-07-18 11:33 ` Marcin Obara
0 siblings, 0 replies; 42+ messages in thread
From: Marcin Obara @ 2008-07-18 11:33 UTC (permalink / raw)
To: Andi Kleen; +Cc: linux-kernel
2008/7/18 Andi Kleen <andi@firstfloor.org>:
> Marcin Obara wrote:
>> 2008/7/18 Andi Kleen <andi@firstfloor.org>:
>>> How about the save oops data in HECI code? Will that be posted
>>> on top of this?
>>
>> This question was mostly already answered in
>> http://lkml.org/lkml/2007/12/11/166
>> In addition current MEI driver is for current platforms (AMT 3, 4, 5)
>> and have no AMT 1.0 legacy support.
>
> Well it didn't answer the question. Are you planning to submit
> code to store the oopses/kernel log based on this code or not?
>
> -Andi
For today... I have no such plans.
--
Marcin
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-07-18 10:51 ` Marcin Obara
@ 2008-07-18 11:02 ` Andi Kleen
2008-07-18 11:33 ` Marcin Obara
0 siblings, 1 reply; 42+ messages in thread
From: Andi Kleen @ 2008-07-18 11:02 UTC (permalink / raw)
To: Marcin Obara; +Cc: linux-kernel
Marcin Obara wrote:
> 2008/7/18 Andi Kleen <andi@firstfloor.org>:
>> How about the save oops data in HECI code? Will that be posted
>> on top of this?
>
> This question was mostly already answered in
> http://lkml.org/lkml/2007/12/11/166
> In addition current MEI driver is for current platforms (AMT 3, 4, 5)
> and have no AMT 1.0 legacy support.
Well it didn't answer the question. Are you planning to submit
code to store the oopses/kernel log based on this code or not?
-Andi
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-07-18 9:27 ` Andi Kleen
@ 2008-07-18 10:51 ` Marcin Obara
2008-07-18 11:02 ` Andi Kleen
0 siblings, 1 reply; 42+ messages in thread
From: Marcin Obara @ 2008-07-18 10:51 UTC (permalink / raw)
To: Andi Kleen; +Cc: linux-kernel
2008/7/18 Andi Kleen <andi@firstfloor.org>:
> How about the save oops data in HECI code? Will that be posted
> on top of this?
This question was mostly already answered in
http://lkml.org/lkml/2007/12/11/166
In addition current MEI driver is for current platforms (AMT 3, 4, 5)
and have no AMT 1.0 legacy support.
Marcin
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-07-17 18:27 Marcin Obara
2008-07-18 0:00 ` Randy Dunlap
2008-07-18 5:44 ` Marcin Obara
@ 2008-07-18 9:27 ` Andi Kleen
2008-07-18 10:51 ` Marcin Obara
2008-08-06 16:56 ` Pavel Machek
3 siblings, 1 reply; 42+ messages in thread
From: Andi Kleen @ 2008-07-18 9:27 UTC (permalink / raw)
To: Marcin Obara; +Cc: linux-kernel
Marcin Obara <marcin_obara@users.sourceforge.net> writes:
> Fixed more issues raised on lkml after previous submission.
How about the save oops data in HECI code? Will that be posted
on top of this?
-Andi
^ permalink raw reply [flat|nested] 42+ messages in thread
* [PATCH] Intel Management Engine Interface
2008-07-17 18:27 Marcin Obara
2008-07-18 0:00 ` Randy Dunlap
@ 2008-07-18 5:44 ` Marcin Obara
2008-07-18 17:39 ` Marcin Obara
2008-07-18 9:27 ` Andi Kleen
2008-08-06 16:56 ` Pavel Machek
3 siblings, 1 reply; 42+ messages in thread
From: Marcin Obara @ 2008-07-18 5:44 UTC (permalink / raw)
To: linux-kernel
Fixed style issues raised on lkml after yesterday submission.
The Intel Management Engine Interface (aka HECI: Host Embedded
Controller Interface ) enables communication between the host OS and
the Management Engine firmware. MEI is bi-directional, and either the
host or Intel AMT firmware can initiate transactions.
The core hardware architecture of Intel Active Management Technology
(Intel AMT) is resident in firmware. The micro-controller within the
chipset's graphics and memory controller (GMCH) hub houses the
Management Engine (ME) firmware, which implements various services
on behalf of management applications.
Some of the ME subsystems that can be access via MEI driver:
- Intel(R) Quiet System Technology (QST) is implemented as a firmware
subsystem that runs in the ME. Programs that wish to expose the
health monitoring and fan speed control capabilities of Intel(R) QST
will need to use the MEI driver to communicate with the ME sub-system.
- ASF is the "Alert Standard Format" which is an DMTF manageability
standard. It is implemented in the PC's hardware and firmware, and is
managed from a remote console.
Most recent Intel desktop chipsets have one or more of the above ME
services. The MEI driver will make it possible to support the above
features on Linux and provides applications access to the ME and it's
features.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Signed-off-by: Marcin Obara <marcin.obara@intel.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 93fd6b2..adb913b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2195,6 +2195,15 @@ L: e1000-devel@lists.sourceforge.net
W: http://e1000.sourceforge.net/
S: Supported
+INTEL MANAGEABILITY ENGINE INTERFACE (HECI)
+P: Anas Nashif
+M: anas.nashif@intel.com
+P: Marcin Obara
+M: marcin.obara@intel.com
+W: http://www.openamt.org/
+L: openamt-devel@lists.sourceforge.net
+S: Supported
+
INTEL PRO/WIRELESS 2100 NETWORK CONNECTION SUPPORT
P: Zhu Yi
M: yi.zhu@intel.com
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 650e6b4..9872215 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -1103,6 +1103,7 @@ config DEVPORT
default y
source "drivers/s390/char/Kconfig"
+source "drivers/char/heci/Kconfig"
endmenu
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 0e0d12a..1d5e700 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -107,6 +107,7 @@ obj-$(CONFIG_IPMI_HANDLER) += ipmi/
obj-$(CONFIG_HANGCHECK_TIMER) += hangcheck-timer.o
obj-$(CONFIG_TCG_TPM) += tpm/
+obj-$(CONFIG_INTEL_MEI) += heci/
obj-$(CONFIG_PS3_FLASH) += ps3flash.o
diff --git a/drivers/char/heci/Kconfig b/drivers/char/heci/Kconfig
new file mode 100644
index 0000000..99b7d05
--- /dev/null
+++ b/drivers/char/heci/Kconfig
@@ -0,0 +1,12 @@
+#
+# HECI device configuration
+#
+
+config INTEL_MEI
+ tristate "Intel Management Engine Interface (MEI) Support (EXPERIMENTAL)"
+ depends on EXPERIMENTAL
+ ---help---
+ The Intel Management Engine Interface (Intel MEI) driver allows
+ applications to access the Active Management Technology
+ firmware and other Management Engine sub-systems.
+
diff --git a/drivers/char/heci/Makefile b/drivers/char/heci/Makefile
new file mode 100644
index 0000000..a2d7182
--- /dev/null
+++ b/drivers/char/heci/Makefile
@@ -0,0 +1,7 @@
+#
+## Makefile for the Intel MEI driver (heci)
+#
+
+obj-$(CONFIG_INTEL_MEI) += heci.o
+
+heci-objs := heci_init.o heci_interface.o heci_main.o interrupt.o io_heci.o
diff --git a/drivers/char/heci/heci.h b/drivers/char/heci/heci.h
new file mode 100644
index 0000000..b04863d
--- /dev/null
+++ b/drivers/char/heci/heci.h
@@ -0,0 +1,176 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_H_
+#define _HECI_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+extern const struct guid heci_pthi_guid;
+extern const struct guid heci_wd_guid;
+extern const __u8 start_wd_params[];
+extern const __u8 stop_wd_params[];
+extern const __u8 heci_wd_state_independence_msg[3][4];
+
+/*
+ * heci device ID
+ */
+#define HECI_DEV_ID_82946GZ 0x2974 /* 82946GZ/GL */
+#define HECI_DEV_ID_82G35 0x2984 /* 82G35 Express */
+#define HECI_DEV_ID_82Q965 0x2994 /* 82Q963/Q965 */
+#define HECI_DEV_ID_82G965 0x29A4 /* 82P965/G965 */
+
+#define HECI_DEV_ID_82GM965 0x2A04 /* Mobile PM965/GM965 */
+#define HECI_DEV_ID_82GME965 0x2A14 /* Mobile GME965/GLE960 */
+
+#define HECI_DEV_ID_ICH9_82Q35 0x29B4 /* 82Q35 Express */
+#define HECI_DEV_ID_ICH9_82G33 0x29C4 /* 82G33/G31/P35/P31 Express */
+#define HECI_DEV_ID_ICH9_82Q33 0x29D4 /* 82Q33 Express */
+#define HECI_DEV_ID_ICH9_82X38 0x29E4 /* 82X38/X48 Express */
+#define HECI_DEV_ID_ICH9_3200 0x29F4 /* 3200/3210 Server */
+
+#define HECI_DEV_ID_ICH9_6 0x28B4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_7 0x28C4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_8 0x28D4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_9 0x28E4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_10 0x28F4 /* Bearlake */
+
+#define HECI_DEV_ID_ICH9M_1 0x2A44 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_2 0x2A54 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_3 0x2A64 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_4 0x2A74 /* Cantiga */
+
+#define HECI_DEV_ID_ICH10_1 0x2E04 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_2 0x2E14 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_3 0x2E24 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_4 0x2E34 /* Eaglelake */
+
+/*
+ * heci init function prototypes
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev);
+void heci_reset(struct iamt_heci_device *dev, int interrupts);
+int heci_hw_init(struct iamt_heci_device *dev);
+int heci_task_initialize_clients(void *data);
+int heci_initialize_clients(struct iamt_heci_device *dev);
+struct heci_file_private *heci_alloc_file_private(struct file *file);
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev);
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext);
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id);
+
+/*
+ * interrupt function prototype
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id);
+
+void heci_wd_timer(unsigned long data);
+
+/*
+ * input output function prototype
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_connect_client(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file);
+
+int heci_ioctl_wd(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_bypass_wd(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_start_read(struct iamt_heci_device *device, int if_num,
+ struct heci_file_private *file_ext);
+
+int pthi_write(struct iamt_heci_device *device,
+ struct heci_cb_private *priv_cb);
+
+int pthi_read(struct iamt_heci_device *device, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset);
+
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *device,
+ struct file *file);
+
+void run_next_iamthif_cmd(struct iamt_heci_device *device);
+
+void heci_free_cb_private(struct heci_cb_private *priv_cb);
+
+/**
+ * heci_fe_same_id - tell if file private data have same id
+ *
+ * @fe1: private data of 1. file object
+ * @fe2: private data of 2. file object
+ *
+ * returns !=0 - if ids are the same, 0 - if differ.
+ */
+static inline int heci_fe_same_id(struct heci_file_private *fe1,
+ struct heci_file_private *fe2)
+{
+ return ((fe1->host_client_id == fe2->host_client_id)
+ && (fe1->me_client_id == fe2->me_client_id));
+}
+
+#endif /* _HECI_H_ */
diff --git a/drivers/char/heci/heci_data_structures.h b/drivers/char/heci/heci_data_structures.h
new file mode 100644
index 0000000..1321721
--- /dev/null
+++ b/drivers/char/heci/heci_data_structures.h
@@ -0,0 +1,524 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_DATA_STRUCTURES_H_
+#define _HECI_DATA_STRUCTURES_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+
+/*
+ * error code definition
+ */
+#define ESLOTS_OVERFLOW 1
+#define ECORRUPTED_MESSAGE_HEADER 1000
+#define ECOMPLETE_MESSAGE 1001
+
+#define HECI_FC_MESSAGE_RESERVED_LENGTH 5
+
+/*
+ * Number of queue lists used by this driver
+ */
+#define HECI_IO_LISTS_NUMBER 7
+
+/*
+ * Maximum transmission unit (MTU) of heci messages
+ */
+#define IAMTHIF_MTU 4160
+
+
+/*
+ * HECI HW Section
+ */
+
+/* HECI registers */
+/* H_CB_WW - Host Circular Buffer (CB) Write Window register */
+#define H_CB_WW 0
+/* H_CSR - Host Control Status register */
+#define H_CSR 4
+/* ME_CB_RW - ME Circular Buffer Read Window register (read only) */
+#define ME_CB_RW 8
+/* ME_CSR_HA - ME Control Status Host Access register (read only) */
+#define ME_CSR_HA 0xC
+
+
+/* register bits of H_CSR (Host Control Status register) */
+/* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */
+#define H_CBD 0xFF000000
+/* Host Circular Buffer Write Pointer */
+#define H_CBWP 0x00FF0000
+/* Host Circular Buffer Read Pointer */
+#define H_CBRP 0x0000FF00
+/* Host Reset */
+#define H_RST 0x00000010
+/* Host Ready */
+#define H_RDY 0x00000008
+/* Host Interrupt Generate */
+#define H_IG 0x00000004
+/* Host Interrupt Status */
+#define H_IS 0x00000002
+/* Host Interrupt Enable */
+#define H_IE 0x00000001
+
+
+/* register bits of ME_CSR_HA (ME Control Status Host Access register) */
+/* ME CB (Circular Buffer) Depth HRA (Host Read Access)
+ * - host read only access to ME_CBD */
+#define ME_CBD_HRA 0xFF000000
+/* ME CB Write Pointer HRA - host read only access to ME_CBWP */
+#define ME_CBWP_HRA 0x00FF0000
+/* ME CB Read Pointer HRA - host read only access to ME_CBRP */
+#define ME_CBRP_HRA 0x0000FF00
+/* ME Reset HRA - host read only access to ME_RST */
+#define ME_RST_HRA 0x00000010
+/* ME Ready HRA - host read only access to ME_RDY */
+#define ME_RDY_HRA 0x00000008
+/* ME Interrupt Generate HRA - host read only access to ME_IG */
+#define ME_IG_HRA 0x00000004
+/* ME Interrupt Status HRA - host read only access to ME_IS */
+#define ME_IS_HRA 0x00000002
+/* ME Interrupt Enable HRA - host read only access to ME_IE */
+#define ME_IE_HRA 0x00000001
+
+#define HECI_MINORS_BASE 1
+#define HECI_MINORS_COUNT 1
+
+#define HECI_MINOR_NUMBER 1
+#define HECI_MAX_OPEN_HANDLE_COUNT 253
+
+/*
+ * debug kernel print macro define
+ */
+extern int heci_debug;
+
+#define DBG(format, arg...) do { \
+ if (heci_debug) \
+ printk(KERN_INFO "heci: %s: " format , __func__ , ## arg); \
+} while (0)
+
+
+/*
+ * time to wait HECI become ready after init
+ */
+#define HECI_INTEROP_TIMEOUT (HZ * 7)
+
+/*
+ * watch dog definition
+ */
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+#define HECI_WD_STATE_INDEPENDENCE_MSG_SENT (1 << 0)
+
+#define HECI_WD_HOST_CLIENT_ID 1
+#define HECI_IAMTHIF_HOST_CLIENT_ID 2
+
+struct guid {
+ __u32 data1;
+ __u16 data2;
+ __u16 data3;
+ __u8 data4[8];
+} __attribute__((packed));
+
+/* File state */
+enum file_state {
+ HECI_FILE_INITIALIZING = 0,
+ HECI_FILE_CONNECTING,
+ HECI_FILE_CONNECTED,
+ HECI_FILE_DISCONNECTING,
+ HECI_FILE_DISCONNECTED
+};
+
+/* HECI device states */
+enum heci_states {
+ HECI_INITIALIZING = 0,
+ HECI_ENABLED,
+ HECI_RESETING,
+ HECI_DISABLED,
+ HECI_RECOVERING_FROM_RESET,
+ HECI_POWER_DOWN,
+ HECI_POWER_UP
+};
+
+enum iamthif_states {
+ HECI_IAMTHIF_IDLE,
+ HECI_IAMTHIF_WRITING,
+ HECI_IAMTHIF_FLOW_CONTROL,
+ HECI_IAMTHIF_READING,
+ HECI_IAMTHIF_READ_COMPLETE
+};
+
+enum heci_file_transaction_states {
+ HECI_IDLE,
+ HECI_WRITING,
+ HECI_WRITE_COMPLETE,
+ HECI_FLOW_CONTROL,
+ HECI_READING,
+ HECI_READ_COMPLETE
+};
+
+/* HECI CB */
+enum heci_cb_major_types {
+ HECI_READ = 0,
+ HECI_WRITE,
+ HECI_IOCTL,
+ HECI_OPEN,
+ HECI_CLOSE
+};
+
+/* HECI user data struct */
+struct heci_message_data {
+ __u32 size;
+ char *data;
+} __attribute__((packed));
+
+#define HECI_CONNECT_TIMEOUT 3 /* at least 2 seconds */
+
+#define IAMTHIF_STALL_TIMER 12 /* seconds */
+#define IAMTHIF_READ_TIMER 15 /* seconds */
+
+struct heci_cb_private {
+ struct list_head cb_list;
+ enum heci_cb_major_types major_file_operations;
+ void *file_private;
+ struct heci_message_data request_buffer;
+ struct heci_message_data response_buffer;
+ unsigned long information;
+ unsigned long read_time;
+ struct file *file_object;
+};
+
+/* Private file struct */
+struct heci_file_private {
+ struct list_head link;
+ struct file *file;
+ enum file_state state;
+ wait_queue_head_t tx_wait;
+ wait_queue_head_t rx_wait;
+ wait_queue_head_t wait;
+ spinlock_t file_lock; /* file lock */
+ spinlock_t read_io_lock; /* read lock */
+ spinlock_t write_io_lock; /* write lock */
+ int read_pending;
+ int status;
+ /* ID of client connected */
+ __u8 host_client_id;
+ __u8 me_client_id;
+ __u8 flow_ctrl_creds;
+ __u8 timer_count;
+ enum heci_file_transaction_states reading_state;
+ enum heci_file_transaction_states writing_state;
+ int sm_state;
+ struct heci_cb_private *read_cb;
+};
+
+struct io_heci_list {
+ struct heci_cb_private heci_cb;
+ int status;
+ struct iamt_heci_device *device_extension;
+};
+
+struct heci_driver_version {
+ __u8 major;
+ __u8 minor;
+ __u8 hotfix;
+ __u16 build;
+} __attribute__((packed));
+
+
+struct heci_client {
+ __u32 max_msg_length;
+ __u8 protocol_version;
+} __attribute__((packed));
+
+/*
+ * HECI BUS Interface Section
+ */
+struct heci_msg_hdr {
+ __u32 me_addr:8;
+ __u32 host_addr:8;
+ __u32 length:9;
+ __u32 reserved:6;
+ __u32 msg_complete:1;
+} __attribute__((packed));
+
+
+struct hbm_cmd {
+ __u8 cmd:7;
+ __u8 is_response:1;
+} __attribute__((packed));
+
+
+struct heci_bus_message {
+ struct hbm_cmd cmd;
+ __u8 command_specific_data[];
+} __attribute__((packed));
+
+struct hbm_version {
+ __u8 minor_version;
+ __u8 major_version;
+} __attribute__((packed));
+
+struct hbm_host_version_request {
+ struct hbm_cmd cmd;
+ __u8 reserved;
+ struct hbm_version host_version;
+} __attribute__((packed));
+
+struct hbm_host_version_response {
+ struct hbm_cmd cmd;
+ int host_version_supported;
+ struct hbm_version me_max_version;
+} __attribute__((packed));
+
+struct hbm_host_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_stop_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_me_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_enum_request {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_host_enum_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+ __u8 valid_addresses[32];
+} __attribute__((packed));
+
+struct heci_client_properties {
+ struct guid protocol_name;
+ __u8 protocol_version;
+ __u8 max_number_of_connections;
+ __u8 fixed_address;
+ __u8 single_recv_buf;
+ __u32 max_msg_length;
+} __attribute__((packed));
+
+struct hbm_props_request {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+
+struct hbm_props_response {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 status;
+ __u8 reserved[1];
+ struct heci_client_properties client_properties;
+} __attribute__((packed));
+
+struct hbm_client_connect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved;
+} __attribute__((packed));
+
+struct hbm_client_connect_response {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 status;
+} __attribute__((packed));
+
+struct hbm_client_disconnect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[1];
+} __attribute__((packed));
+
+struct hbm_flow_control {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[HECI_FC_MESSAGE_RESERVED_LENGTH];
+} __attribute__((packed));
+
+struct heci_me_client {
+ struct heci_client_properties props;
+ __u8 client_id;
+ __u8 flow_ctrl_creds;
+} __attribute__((packed));
+
+/* private device struct */
+struct iamt_heci_device {
+ struct pci_dev *pdev; /* pointer to pci device struct */
+ /*
+ * lists of queues
+ */
+ /* array of pointers to aio lists */
+ struct io_heci_list *io_list_array[HECI_IO_LISTS_NUMBER];
+ struct io_heci_list read_list; /* driver read queue */
+ struct io_heci_list write_list; /* driver write queue */
+ struct io_heci_list write_waiting_list; /* write waiting queue */
+ struct io_heci_list ctrl_wr_list; /* managed write IOCTL list */
+ struct io_heci_list ctrl_rd_list; /* managed read IOCTL list */
+ struct io_heci_list pthi_cmd_list; /* PTHI list for cmd waiting */
+
+ /* driver managed PTHI list for reading completed pthi cmd data */
+ struct io_heci_list pthi_read_complete_list;
+ /*
+ * list of files
+ */
+ struct list_head file_list;
+ /*
+ * memory of device
+ */
+ unsigned int mem_base;
+ unsigned int mem_length;
+ char *mem_addr;
+ /*
+ * lock for the device
+ */
+ spinlock_t device_lock; /* device lock*/
+ struct work_struct work;
+ int recvd_msg;
+
+ struct task_struct *reinit_tsk;
+
+ struct timer_list wd_timer;
+ /*
+ * hw states of host and fw(ME)
+ */
+ __u32 host_hw_state;
+ __u32 me_hw_state;
+ /*
+ * waiting queue for receive message from FW
+ */
+ wait_queue_head_t wait_recvd_msg;
+ wait_queue_head_t wait_stop_wd;
+ /*
+ * heci device states
+ */
+ enum heci_states heci_state;
+ int stop;
+
+ __u32 extra_write_index;
+ __u32 rd_msg_buf[128]; /* used for control messages */
+ __u32 wr_msg_buf[128]; /* used for control messages */
+ __u32 ext_msg_buf[8]; /* for control responses */
+ __u32 rd_msg_hdr;
+
+ struct hbm_version version;
+
+ int host_buffer_is_empty;
+ struct heci_file_private wd_file_ext;
+ struct heci_me_client *me_clients; /* Note: memory has to be allocated*/
+ __u8 heci_me_clients[32]; /* list of existing clients */
+ __u8 num_heci_me_clients;
+ __u8 heci_host_clients[32]; /* list of existing clients */
+ __u8 current_host_client_id;
+
+ int wd_pending;
+ int wd_stoped;
+ __u16 wd_timeout; /* seconds ((wd_data[1] << 8) + wd_data[0]) */
+ unsigned char wd_data[HECI_START_WD_DATA_SIZE];
+
+
+ __u16 wd_due_counter;
+ int asf_mode;
+ int wd_bypass; /* if 1, don't refresh watchdog ME client */
+
+ struct file *iamthif_file_object;
+ struct heci_file_private iamthif_file_ext;
+ int iamthif_ioctl;
+ int iamthif_canceled;
+ __u32 iamthif_timer;
+ __u32 iamthif_stall_timer;
+ unsigned char iamthif_msg_buf[IAMTHIF_MTU];
+ __u32 iamthif_msg_buf_size;
+ __u32 iamthif_msg_buf_index;
+ int iamthif_flow_control_pending;
+ enum iamthif_states iamthif_state;
+
+ struct heci_cb_private *iamthif_current_cb;
+ __u8 write_hang;
+ int need_reset;
+ long open_handle_count;
+
+};
+
+/**
+ * read_heci_register - Read a byte from the heci device
+ *
+ * @device: the device structure
+ * @offset: offset from which to read the data
+ *
+ * returns the byte read.
+ */
+__u32 read_heci_register(struct iamt_heci_device *device,
+ unsigned long offset);
+
+/**
+ * write_heci_register - Write 4 bytes to the heci device
+ *
+ * @device: the device structure
+ * @offset: offset from which to write the data
+ * @value: the byte to write
+ */
+void write_heci_register(struct iamt_heci_device *device, unsigned long offset,
+ __u32 value);
+
+#endif /* _HECI_DATA_STRUCTURES_H_ */
diff --git a/drivers/char/heci/heci_init.c b/drivers/char/heci/heci_init.c
new file mode 100644
index 0000000..52ad7a1
--- /dev/null
+++ b/drivers/char/heci/heci_init.c
@@ -0,0 +1,1080 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/moduleparam.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+
+#include "heci_data_structures.h"
+#include "heci_interface.h"
+#include "heci.h"
+
+
+const __u8 watch_dog_data[] = {
+ 1, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
+};
+const __u8 start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 };
+const __u8 stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10 };
+
+const __u8 heci_wd_state_independence_msg[3][4] = {
+ {0x05, 0x02, 0x51, 0x10},
+ {0x05, 0x02, 0x52, 0x10},
+ {0x07, 0x02, 0x01, 0x10}
+};
+
+const struct guid heci_asf_guid = {
+ 0x75B30CD6, 0xA29E, 0x4AF7,
+ {0xA7, 0x12, 0xE6, 0x17, 0x43, 0x93, 0xC8, 0xA6}
+};
+const struct guid heci_wd_guid = {
+ 0x05B79A6F, 0x4628, 0x4D7F,
+ {0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB}
+};
+const struct guid heci_pthi_guid = {
+ 0x12f80028, 0xb4b7, 0x4b2d,
+ {0xac, 0xa8, 0x46, 0xe0, 0xff, 0x65, 0x81, 0x4c}
+};
+
+
+/*
+ * heci init function prototypes
+ */
+static void heci_check_asf_mode(struct iamt_heci_device *dev);
+static int host_start_message(struct iamt_heci_device *dev);
+static int host_enum_clients_message(struct iamt_heci_device *dev);
+static int allocate_me_clients_storage(struct iamt_heci_device *dev);
+static void host_init_wd(struct iamt_heci_device *dev);
+static void host_init_iamthif(struct iamt_heci_device *dev);
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout);
+
+
+/**
+ * heci_initialize_list - Sets up a queue list.
+ *
+ * @list: An instance of our list structure
+ * @dev: Device object for our driver
+ */
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev)
+{
+ /* initialize our queue list */
+ INIT_LIST_HEAD(&list->heci_cb.cb_list);
+ list->status = 0;
+ list->device_extension = dev;
+}
+
+/**
+ * heci_flush_queues - flush our queues list belong to file_ext.
+ *
+ * @dev: Device object for our driver
+ * @file_ext: private data of the file object
+ */
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int i;
+
+ if (!dev || !file_ext)
+ return;
+
+ /* flush our queue list belong to file_ext */
+ for (i = 0; i < HECI_IO_LISTS_NUMBER; i++) {
+ DBG("remove list entry belong to file_ext\n");
+ heci_flush_list(dev->io_list_array[i], file_ext);
+ }
+}
+
+
+/**
+ * heci_flush_list - remove list entry belong to file_ext.
+ *
+ * @list: An instance of our list structure
+ * @file_ext: private data of the file object
+ */
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext)
+{
+ struct heci_file_private *file_ext_tmp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if (!list || !file_ext)
+ return;
+
+ if (list->status != 0)
+ return;
+
+ if (list_empty(&list->heci_cb.cb_list))
+ return;
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &list->heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos) {
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext_tmp) {
+ if (heci_fe_same_id(file_ext, file_ext_tmp))
+ list_del(&priv_cb_pos->cb_list);
+ }
+ }
+ }
+}
+
+/**
+ * heci_reset_iamthif_params - initializes heci device iamthif
+ *
+ * @dev: The heci device structure
+ */
+static void heci_reset_iamthif_params(struct iamt_heci_device *dev)
+{
+ /* reset iamthif parameters. */
+ dev->iamthif_current_cb = NULL;
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_file_ext.file = NULL;
+ dev->iamthif_ioctl = 0;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+}
+
+/**
+ * init_heci_device - allocates and initializes the heci device structure
+ *
+ * @pdev: The pci device structure
+ *
+ * returns The heci_device_device pointer on success, NULL on failure.
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev)
+{
+ int i;
+ struct iamt_heci_device *device;
+
+ device = kzalloc(sizeof(struct iamt_heci_device), GFP_KERNEL);
+ if (!device)
+ return NULL;
+
+ /* setup our list array */
+ device->io_list_array[0] = &device->read_list;
+ device->io_list_array[1] = &device->write_list;
+ device->io_list_array[2] = &device->write_waiting_list;
+ device->io_list_array[3] = &device->ctrl_wr_list;
+ device->io_list_array[4] = &device->ctrl_rd_list;
+ device->io_list_array[5] = &device->pthi_cmd_list;
+ device->io_list_array[6] = &device->pthi_read_complete_list;
+ INIT_LIST_HEAD(&device->file_list);
+ INIT_LIST_HEAD(&device->wd_file_ext.link);
+ INIT_LIST_HEAD(&device->iamthif_file_ext.link);
+ spin_lock_init(&device->device_lock);
+ init_waitqueue_head(&device->wait_recvd_msg);
+ init_waitqueue_head(&device->wait_stop_wd);
+ device->heci_state = HECI_INITIALIZING;
+ device->iamthif_state = HECI_IAMTHIF_IDLE;
+
+ /* init work for schedule work */
+ INIT_WORK(&device->work, NULL);
+ for (i = 0; i < HECI_IO_LISTS_NUMBER; i++)
+ heci_initialize_list(device->io_list_array[i], device);
+ device->pdev = pdev;
+ return device;
+}
+
+
+
+
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout)
+{
+ return wait_event_interruptible_timeout(dev->wait_recvd_msg,
+ (dev->recvd_msg), timeout);
+}
+
+/**
+ * heci_hw_init - init host and fw to start work.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_hw_init(struct iamt_heci_device *dev)
+{
+ int err = 0;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ DBG("host_hw_state = 0x%08x, mestate = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ /* acknowledge interrupt and stop interupts */
+ heci_set_csr_register(dev);
+ }
+ dev->recvd_msg = 0;
+ DBG("reset in start the heci device.\n");
+
+ heci_reset(dev, 1);
+
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ /* wait for ME to turn on ME_RDY */
+ if (!dev->recvd_msg)
+ err = heci_wait_event_int_timeout(dev, HECI_INTEROP_TIMEOUT);
+
+ if (!err && !dev->recvd_msg) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("wait_event_interruptible_timeout failed"
+ "on wait for ME to turn on ME_RDY.\n");
+ return -ENODEV;
+ } else {
+ if (!(((dev->host_hw_state & H_RDY) == H_RDY)
+ && ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state,
+ dev->me_hw_state);
+
+ if (!(dev->host_hw_state & H_RDY) != H_RDY)
+ DBG("host turn off H_RDY.\n");
+
+ if (!(dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ DBG("ME turn off ME_RDY.\n");
+
+ printk(KERN_ERR
+ "heci: link layer initialization failed.\n");
+ return -ENODEV;
+ }
+ }
+ dev->recvd_msg = 0;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+ DBG("ME turn on ME_RDY and host turn on H_RDY.\n");
+ printk(KERN_INFO "heci: link layer has been established.\n");
+ return 0;
+}
+
+/**
+ * heci_hw_reset - reset fw via heci csr register.
+ *
+ * @dev: Device object for our driver
+ * @interrupts: if interrupt should be enable after reset.
+ */
+static void heci_hw_reset(struct iamt_heci_device *dev, int interrupts)
+{
+ dev->host_hw_state |= (H_RST | H_IG);
+
+ if (interrupts)
+ heci_csr_enable_interrupts(dev);
+ else
+ heci_csr_disable_interrupts(dev);
+
+ BUG_ON((dev->host_hw_state & H_RST) != H_RST);
+ BUG_ON((dev->host_hw_state & H_RDY) != 0);
+}
+
+/**
+ * heci_reset - reset host and fw.
+ *
+ * @dev: Device object for our driver
+ * @interrupts: if interrupt should be enable after reset.
+ */
+void heci_reset(struct iamt_heci_device *dev, int interrupts)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int unexpected = 0;
+
+ if (dev->heci_state == HECI_RECOVERING_FROM_RESET) {
+ dev->need_reset = 1;
+ return;
+ }
+
+ if (dev->heci_state != HECI_INITIALIZING &&
+ dev->heci_state != HECI_DISABLED &&
+ dev->heci_state != HECI_POWER_DOWN &&
+ dev->heci_state != HECI_POWER_UP)
+ unexpected = 1;
+
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+
+ DBG("before reset host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ heci_hw_reset(dev, interrupts);
+
+ dev->host_hw_state &= ~H_RST;
+ dev->host_hw_state |= H_IG;
+
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+
+ DBG("currently saved host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ dev->need_reset = 0;
+
+ if (dev->heci_state != HECI_INITIALIZING) {
+ if ((dev->heci_state != HECI_DISABLED) &&
+ (dev->heci_state != HECI_POWER_DOWN))
+ dev->heci_state = HECI_RESETING;
+
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->flow_ctrl_creds = 0;
+ file_pos->read_cb = NULL;
+ file_pos->timer_count = 0;
+ }
+ /* remove entry if already in list */
+ DBG("list del iamthif and wd file list.\n");
+ heci_remove_client_from_file_list(dev,
+ dev->wd_file_ext.host_client_id);
+
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+
+ heci_reset_iamthif_params(dev);
+ dev->wd_due_counter = 0;
+ dev->extra_write_index = 0;
+ }
+
+ dev->num_heci_me_clients = 0;
+ dev->rd_msg_hdr = 0;
+ dev->stop = 0;
+ dev->wd_pending = 0;
+
+ /* update the state of the registers after reset */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ DBG("after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if (unexpected)
+ printk(KERN_WARNING "heci: unexpected reset.\n");
+
+ /* Wake up all readings so they can be interrupted */
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (&file_pos->rx_wait &&
+ waitqueue_active(&file_pos->rx_wait)) {
+ printk(KERN_INFO "heci: Waking up client!\n");
+ wake_up_interruptible(&file_pos->rx_wait);
+ }
+ }
+ /* remove all waiting requests */
+ if (dev->write_list.status == 0 &&
+ !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos) {
+ list_del(&priv_cb_pos->cb_list);
+ heci_free_cb_private(priv_cb_pos);
+ }
+ }
+ }
+}
+
+/**
+ * heci_initialize_clients - heci communication initialization.
+ *
+ * @dev: Device object for our driver
+ */
+int heci_initialize_clients(struct iamt_heci_device *dev)
+{
+ int status;
+
+ msleep(100); /* FW needs time to be ready to talk with us */
+ DBG("link is established start sending messages.\n");
+ /* link is established start sending messages. */
+ status = host_start_message(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("start sending messages failed.\n");
+ return status;
+ }
+
+ /* enumerate clients */
+ status = host_enum_clients_message(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("enum clients failed.\n");
+ return status;
+ }
+ /* allocate storage for ME clients representation */
+ status = allocate_me_clients_storage(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->num_heci_me_clients = 0;
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("allocate clients failed.\n");
+ return status;
+ }
+
+ heci_check_asf_mode(dev);
+ /*heci initialization wd */
+ host_init_wd(dev);
+ /*heci initialization iamthif client */
+ host_init_iamthif(dev);
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->need_reset) {
+ dev->need_reset = 0;
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+
+ memset(dev->heci_host_clients, 0, sizeof(dev->heci_host_clients));
+ dev->open_handle_count = 0;
+ dev->heci_host_clients[0] |= 7;
+ dev->current_host_client_id = 3;
+ dev->heci_state = HECI_ENABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("initialization heci clients successful.\n");
+ return 0;
+}
+
+/**
+ * heci_task_initialize_clients - heci reinitialization task
+ *
+ * @data: Device object for our driver
+ */
+int heci_task_initialize_clients(void *data)
+{
+ int ret;
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->reinit_tsk != NULL) {
+ spin_unlock_bh(&dev->device_lock);
+ DBG("reinit task already started.\n");
+ return 0;
+ }
+ dev->reinit_tsk = current;
+ current->flags |= PF_NOFREEZE;
+ spin_unlock_bh(&dev->device_lock);
+
+ ret = heci_initialize_clients(dev);
+
+ spin_lock_bh(&dev->device_lock);
+ dev->reinit_tsk = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ return ret;
+}
+
+/**
+ * host_start_message - heci host send start message.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_start_message(struct iamt_heci_device *dev)
+{
+ long timeout = 60; /* 60 second */
+
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_version_request *host_start_req;
+ struct hbm_host_stop_request *host_stop_req;
+ int err = 0;
+
+ /* host start message */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_version_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_start_req =
+ (struct hbm_host_version_request *) &dev->wr_msg_buf[1];
+ memset(host_start_req, 0, sizeof(struct hbm_host_version_request));
+ host_start_req->cmd.cmd = HOST_START_REQ_CMD;
+ host_start_req->host_version.major_version = HBM_MAJOR_VERSION;
+ host_start_req->host_version.minor_version = HBM_MINOR_VERSION;
+ dev->recvd_msg = 0;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_start_req),
+ heci_hdr->length)) {
+ DBG("send version to fw fail.\n");
+ return -ENODEV;
+ }
+ DBG("call wait_event_interruptible_timeout for response message.\n");
+ /* wait for response */
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait_timeout failed on host start response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ DBG("wait_timeout successful on host start response message.\n");
+ if ((dev->version.major_version != HBM_MAJOR_VERSION) ||
+ (dev->version.minor_version != HBM_MINOR_VERSION)) {
+ /* send stop message */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_stop_req =
+ (struct hbm_host_stop_request *) &dev->wr_msg_buf[1];
+
+ memset(host_stop_req, 0, sizeof(struct hbm_host_stop_request));
+ host_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ host_stop_req->reason = DRIVER_STOP_REQUEST;
+ heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_stop_req),
+ heci_hdr->length);
+ DBG("version mismatch.\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/**
+ * host_enum_clients_message - host send enumeration client request message.
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_enum_clients_message(struct iamt_heci_device *dev)
+{
+ long timeout = 5; /*5 second */
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_enum_request *host_enum_req;
+ int err = 0;
+ __u8 i, j;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ /* enumerate clients */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_enum_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1];
+ memset(host_enum_req, 0, sizeof(struct hbm_host_enum_request));
+ host_enum_req->cmd.cmd = HOST_ENUM_REQ_CMD;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_enum_req),
+ heci_hdr->length)) {
+ DBG("send enumeration request failed.\n");
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait_event_interruptible_timeout failed "
+ "on enumeration clients response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+
+ spin_lock_bh(&dev->device_lock);
+ /* count how many ME clients we have */
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0)
+ dev->num_heci_me_clients++;
+
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ return 0;
+}
+
+/**
+ * host_client_properties - reads properties for client
+ *
+ * @dev: Device object for our driver
+ * @idx: client index in me client array
+ * @client_id: id of the client
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int host_client_properties(struct iamt_heci_device *dev,
+ struct heci_me_client *client)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_props_request *host_cli_req;
+ int err;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_props_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_cli_req = (struct hbm_props_request *) &dev->wr_msg_buf[1];
+ memset(host_cli_req, 0, sizeof(struct hbm_props_request));
+ host_cli_req->cmd.cmd = HOST_CLIENT_PROPERTEIS_REQ_CMD;
+ host_cli_req->address = client->client_id;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_cli_req),
+ heci_hdr->length)) {
+ DBG("send props request failed.\n");
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev, 10 * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait failed on props resp msg.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ return 0;
+}
+
+/**
+ * allocate_me_clients_storage - allocate storage for me clients
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int allocate_me_clients_storage(struct iamt_heci_device *dev)
+{
+ struct heci_me_client *clients;
+ struct heci_me_client *client;
+ __u8 num, i, j;
+ int err;
+
+ if (dev->num_heci_me_clients <= 0)
+ return 0;
+
+ spin_lock_bh(&dev->device_lock);
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ /* allocate storage for ME clients representation */
+ clients = kcalloc(dev->num_heci_me_clients,
+ sizeof(struct heci_me_client), GFP_KERNEL);
+ if (!clients) {
+ DBG("memory allocation for ME clients failed.\n");
+ return -ENOMEM;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ dev->me_clients = clients;
+ spin_unlock_bh(&dev->device_lock);
+
+ num = 0;
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0) {
+ client = &dev->me_clients[num];
+ client->client_id = (i * 8) + j;
+ client->flow_ctrl_creds = 0;
+ err = host_client_properties(dev, client);
+ if (err != 0) {
+ spin_lock_bh(&dev->device_lock);
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+ spin_unlock_bh(&dev->device_lock);
+ return err;
+ }
+ num++;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * heci_init_file_private - initializes private file structure.
+ *
+ * @priv: private file structure to be initialized
+ * @file: the file structure
+ */
+static void heci_init_file_private(struct heci_file_private *priv,
+ struct file *file)
+{
+ memset(priv, 0, sizeof(struct heci_file_private));
+ spin_lock_init(&priv->file_lock);
+ spin_lock_init(&priv->read_io_lock);
+ spin_lock_init(&priv->write_io_lock);
+ init_waitqueue_head(&priv->wait);
+ init_waitqueue_head(&priv->rx_wait);
+ DBG("priv->rx_wait =%p\n", &priv->rx_wait);
+ init_waitqueue_head(&priv->tx_wait);
+ INIT_LIST_HEAD(&priv->link);
+ priv->reading_state = HECI_IDLE;
+ priv->writing_state = HECI_IDLE;
+}
+
+/**
+ * heci_find_me_client - search for ME client guid
+ * sets client_id in heci_file_private if found
+ * @dev: Device object for our driver
+ * @priv: private file structure to set client_id in
+ * @cguid: searched guid of ME client
+ * @client_id: id of host client to be set in file private structure
+ *
+ * returns ME client index
+ */
+static __u8 heci_find_me_client(struct iamt_heci_device *dev,
+ struct heci_file_private *priv,
+ const struct guid *cguid, __u8 client_id)
+{
+ __u8 i;
+
+ if ((dev == NULL) || (priv == NULL) || (cguid == NULL))
+ return 0;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(cguid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ priv->me_client_id = dev->me_clients[i].client_id;
+ priv->state = HECI_FILE_CONNECTING;
+ priv->host_client_id = client_id;
+
+ list_add_tail(&priv->link, &dev->file_list);
+ return i;
+ }
+ }
+ return 0;
+}
+
+/**
+ * heci_check_asf_mode - check for ASF client
+ *
+ * @dev: Device object for our driver
+ */
+static void heci_check_asf_mode(struct iamt_heci_device *dev)
+{
+ __u8 i;
+
+ spin_lock_bh(&dev->device_lock);
+ dev->asf_mode = 0;
+ /* find ME ASF client - otherwise assume AMT mode */
+ DBG("find ME ASF client - otherwise assume AMT mode.\n");
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_asf_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ dev->asf_mode = 1;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("found ME ASF client.\n");
+ return;
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+ DBG("assume AMT mode.\n");
+}
+
+/**
+ * heci_connect_me_client - connect ME client
+ * @dev: Device object for our driver
+ * @priv: private file structure
+ * @timeout: connect timeout in seconds
+ *
+ * returns 1 - if connected, 0 - if not
+ */
+static __u8 heci_connect_me_client(struct iamt_heci_device *dev,
+ struct heci_file_private *priv,
+ long timeout)
+{
+ int err = 0;
+
+ if ((dev == NULL) || (priv == NULL))
+ return 0;
+
+ if (!heci_connect(dev, priv)) {
+ DBG("failed to call heci_connect for client_id=%d.\n",
+ priv->host_client_id);
+ spin_lock_bh(&dev->device_lock);
+ heci_remove_client_from_file_list(dev, priv->host_client_id);
+ priv->state = HECI_FILE_DISCONNECTED;
+ spin_unlock_bh(&dev->device_lock);
+ return 0;
+ }
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == priv->state ||
+ HECI_FILE_DISCONNECTED == priv->state),
+ timeout * HZ);
+ if (HECI_FILE_CONNECTED != priv->state) {
+ spin_lock_bh(&dev->device_lock);
+ heci_remove_client_from_file_list(dev, priv->host_client_id);
+ DBG("failed to connect client_id=%d state=%d.\n",
+ priv->host_client_id, priv->state);
+ if (err)
+ DBG("failed connect err=%08x\n", err);
+ priv->state = HECI_FILE_DISCONNECTED;
+ spin_unlock_bh(&dev->device_lock);
+ return 0;
+ }
+ DBG("successfully connected client_id=%d.\n",
+ priv->host_client_id);
+ return 1;
+}
+
+/**
+ * host_init_wd - heci initialization wd.
+ *
+ * @dev: Device object for our driver
+ */
+static void host_init_wd(struct iamt_heci_device *dev)
+{
+ spin_lock_bh(&dev->device_lock);
+
+ heci_init_file_private(&dev->wd_file_ext, NULL);
+
+ /* look for WD client and connect to it */
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTED;
+ dev->wd_timeout = 0;
+
+ if (dev->asf_mode) {
+ memcpy(dev->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
+ } else {
+ /* AMT mode */
+ dev->wd_timeout = AMT_WD_VALUE;
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ memcpy(dev->wd_data, start_wd_params, HECI_WD_PARAMS_SIZE);
+ memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
+ &dev->wd_timeout, sizeof(__u16));
+ }
+
+ /* find ME WD client */
+ heci_find_me_client(dev, &dev->wd_file_ext,
+ &heci_wd_guid, HECI_WD_HOST_CLIENT_ID);
+ spin_unlock_bh(&dev->device_lock);
+
+ DBG("check wd_file_ext\n");
+ if (HECI_FILE_CONNECTING == dev->wd_file_ext.state) {
+ if (heci_connect_me_client(dev, &dev->wd_file_ext, 15) == 1) {
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 1;
+ else
+ dev->wd_due_counter = 0;
+ DBG("successfully connected to WD client.\n");
+ }
+ } else
+ DBG("failed to find WD client.\n");
+
+
+ spin_lock_bh(&dev->device_lock);
+ dev->wd_timer.function = &heci_wd_timer;
+ dev->wd_timer.data = (unsigned long) dev;
+ spin_unlock_bh(&dev->device_lock);
+}
+
+
+/**
+ * host_init_iamthif - heci initialization iamthif client.
+ *
+ * @dev: Device object for our driver
+ *
+ */
+static void host_init_iamthif(struct iamt_heci_device *dev)
+{
+ __u8 i;
+
+ spin_lock_bh(&dev->device_lock);
+
+ heci_init_file_private(&dev->iamthif_file_ext, NULL);
+ dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTED;
+
+ /* find ME PTHI client */
+ i = heci_find_me_client(dev, &dev->iamthif_file_ext,
+ &heci_pthi_guid, HECI_IAMTHIF_HOST_CLIENT_ID);
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTING) {
+ DBG("failed to find iamthif client.\n");
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ BUG_ON(dev->me_clients[i].props.max_msg_length != IAMTHIF_MTU);
+
+ spin_unlock_bh(&dev->device_lock);
+ if (heci_connect_me_client(dev, &dev->iamthif_file_ext, 15) == 1) {
+ DBG("connected to iamthif client.\n");
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ }
+}
+
+/**
+ * heci_alloc_file_private - allocates a private file structure and set it up.
+ * @file: the file structure
+ *
+ * returns The allocated file or NULL on failure
+ */
+struct heci_file_private *heci_alloc_file_private(struct file *file)
+{
+ struct heci_file_private *priv;
+
+ priv = kmalloc(sizeof(struct heci_file_private), GFP_KERNEL);
+ if (!priv)
+ return NULL;
+
+ heci_init_file_private(priv, file);
+
+ return priv;
+}
+
+
+
+/**
+ * heci_disconnect_host_client - send disconnect message to fw from host client.
+ *
+ * @dev: Device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int rets, err;
+ long timeout = 15; /* 15 seconds */
+ struct heci_cb_private *priv_cb;
+
+ if ((!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext->state != HECI_FILE_DISCONNECTING)
+ return 0;
+
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->file_private = file_ext;
+ priv_cb->major_file_operations = HECI_CLOSE;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (heci_disconnect(dev, file_ext)) {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ DBG("failed to call heci_disconnect.\n");
+ goto free;
+ }
+ } else {
+ DBG("add disconnect cb to control write list\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+ if (HECI_FILE_DISCONNECTED == file_ext->state) {
+ rets = 0;
+ DBG("successfully disconnected from fw client.\n");
+ } else {
+ rets = -ENODEV;
+ if (HECI_FILE_DISCONNECTED != file_ext->state)
+ DBG("wrong status client disconnect.\n");
+
+ if (err)
+ DBG("wait failed disconnect err=%08x\n", err);
+
+ DBG("failed to disconnect from fw client.\n");
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_list(&dev->ctrl_rd_list, file_ext);
+ heci_flush_list(&dev->ctrl_wr_list, file_ext);
+ spin_unlock_bh(&dev->device_lock);
+free:
+ heci_free_cb_private(priv_cb);
+ return rets;
+}
+
+/**
+ * heci_remove_client_from_file_list -
+ * remove file private data from device file list
+ *
+ * @dev: Device object for our driver
+ * @host_client_id: host client id to be removed
+ */
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (host_client_id == file_pos->host_client_id) {
+ DBG("remove host client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del_init(&file_pos->link);
+ break;
+ }
+ }
+}
diff --git a/drivers/char/heci/heci_interface.c b/drivers/char/heci/heci_interface.c
new file mode 100644
index 0000000..a2e8e82
--- /dev/null
+++ b/drivers/char/heci/heci_interface.c
@@ -0,0 +1,517 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include "heci.h"
+#include "heci_interface.h"
+
+
+
+static const __u8 interface_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10};
+static const __u8 interface_stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10};
+
+/**
+ * read_heci_register - Read a byte from the heci device
+ *
+ * @device: the device structure
+ * @offset: offset from which to read the data
+ *
+ * returns the byte read.
+ */
+__u32 read_heci_register(struct iamt_heci_device *device,
+ unsigned long offset)
+{
+ return readl(device->mem_addr + offset);
+}
+
+/**
+ * write_heci_register - Write 4 bytes to the heci device
+ *
+ * @device: the device structure
+ * @offset: offset from which to write the data
+ * @value: the byte to write
+ */
+void write_heci_register(struct iamt_heci_device *device, unsigned long offset,
+ __u32 value)
+{
+ writel(value, device->mem_addr + offset);
+}
+
+
+/**
+ * heci_set_csr_register - write H_CSR register to the heci device
+ *
+ * @dev: device object for our driver
+ */
+void heci_set_csr_register(struct iamt_heci_device *dev)
+{
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+}
+
+/**
+ * heci_csr_enable_interrupts - enable heci device interrupts
+ *
+ * @dev: device object for our driver
+ */
+void heci_csr_enable_interrupts(struct iamt_heci_device *dev)
+{
+ dev->host_hw_state |= H_IE;
+ heci_set_csr_register(dev);
+}
+
+/**
+ * heci_csr_disable_interrupts - disable heci device interrupts
+ *
+ * @dev: device object for our driver
+ */
+void heci_csr_disable_interrupts(struct iamt_heci_device *dev)
+{
+ dev->host_hw_state &= ~H_IE;
+ heci_set_csr_register(dev);
+}
+
+
+/**
+ * _host_get_filled_slots - get number of device filled buffer slots
+ *
+ * @device: the device structure
+ *
+ * returns numer of filled slots
+ */
+static unsigned char _host_get_filled_slots(struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+
+ read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8);
+ write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16);
+
+ return (unsigned char) (write_ptr - read_ptr);
+}
+
+/**
+ * host_buffer_is_empty - check if host buffer is empty.
+ *
+ * @dev: device object for our driver
+ *
+ * returns 1 if empty, 0 - otherwise.
+ */
+int host_buffer_is_empty(struct iamt_heci_device *dev)
+{
+ unsigned char filled_slots;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ filled_slots = _host_get_filled_slots(dev);
+
+ if (filled_slots > 0)
+ return 0;
+
+ return 1;
+}
+
+/**
+ * count_empty_write_slots - count write empty slots.
+ *
+ * @dev: device object for our driver
+ *
+ * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise empty slots count
+ */
+__s32 count_empty_write_slots(struct iamt_heci_device *dev)
+{
+ unsigned char buffer_depth, filled_slots, empty_slots;
+
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = _host_get_filled_slots(dev);
+ empty_slots = buffer_depth - filled_slots;
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ return (__s32) empty_slots;
+}
+
+/**
+ * heci_write_message - write a message to heci device.
+ *
+ * @dev: device object for our driver
+ * @heci_hdr: header of message
+ * @write_buffer: message buffer will be write
+ * @write_length: message size will be write
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length)
+{
+ __u32 temp_msg = 0;
+ unsigned long bytes_written = 0;
+ unsigned char buffer_depth, filled_slots, empty_slots;
+ unsigned long dw_to_write;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ DBG("host_hw_state = 0x%08x.\n", dev->host_hw_state);
+ DBG("heci_write_message header=%08x.\n", *((__u32 *) header));
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = _host_get_filled_slots(dev);
+ empty_slots = buffer_depth - filled_slots;
+ DBG("filled = %hu, empty = %hu.\n", filled_slots, empty_slots);
+
+ dw_to_write = ((write_length + 3) / 4);
+
+ if (dw_to_write > empty_slots)
+ return 0;
+
+ write_heci_register(dev, H_CB_WW, *((__u32 *) header));
+
+ while (write_length >= 4) {
+ write_heci_register(dev, H_CB_WW,
+ *(__u32 *) (write_buffer + bytes_written));
+ bytes_written += 4;
+ write_length -= 4;
+ }
+
+ if (write_length > 0) {
+ memcpy(&temp_msg, &write_buffer[bytes_written], write_length);
+ write_heci_register(dev, H_CB_WW, temp_msg);
+ }
+
+ dev->host_hw_state |= H_IG;
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ if ((dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ return 0;
+
+ dev->write_hang = 0;
+ return 1;
+}
+
+/**
+ * count_full_read_slots - count read full slots.
+ *
+ * @dev: device object for our driver
+ *
+ * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise filled slots count
+ */
+__s32 count_full_read_slots(struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+ unsigned char buffer_depth, filled_slots;
+
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ buffer_depth = (unsigned char)((dev->me_hw_state & ME_CBD_HRA) >> 24);
+ read_ptr = (char) ((dev->me_hw_state & ME_CBRP_HRA) >> 8);
+ write_ptr = (char) ((dev->me_hw_state & ME_CBWP_HRA) >> 16);
+ filled_slots = (unsigned char) (write_ptr - read_ptr);
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ DBG("filled_slots =%08x \n", filled_slots);
+ return (__s32) filled_slots;
+}
+
+/**
+ * heci_read_slots - read a message from heci device.
+ *
+ * @dev: device object for our driver
+ * @buffer: message buffer will be write
+ * @buffer_length: message size will be read
+ */
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length)
+{
+ __u32 i = 0;
+ unsigned char temp_buf[sizeof(__u32)];
+
+ while (buffer_length >= sizeof(__u32)) {
+ ((__u32 *) buffer)[i] = read_heci_register(dev, ME_CB_RW);
+ DBG("buffer[%d]= %d\n", i, ((__u32 *) buffer)[i]);
+ i++;
+ buffer_length -= sizeof(__u32);
+ }
+
+ if (buffer_length > 0) {
+ *((__u32 *) &temp_buf) = read_heci_register(dev, ME_CB_RW);
+ memcpy(&buffer[i * 4], temp_buf, buffer_length);
+ }
+
+ dev->host_hw_state |= H_IG;
+ heci_set_csr_register(dev);
+}
+
+/**
+ * flow_ctrl_creds - check flow_control credentials.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if flow_ctrl_creds >0, 0 - otherwise.
+ */
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return 0;
+
+ if (file_ext == NULL)
+ return 0;
+
+ if (file_ext->flow_ctrl_creds > 0)
+ return 1;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].flow_ctrl_creds > 0) {
+ BUG_ON(dev->me_clients[i].props.single_recv_buf
+ == 0);
+ return 1;
+ }
+ return 0;
+ }
+ }
+ BUG();
+ return 0;
+}
+
+/**
+ * flow_ctrl_reduce - reduce flow_control.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ */
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].props.single_recv_buf != 0) {
+ BUG_ON(dev->me_clients[i].flow_ctrl_creds <= 0);
+ dev->me_clients[i].flow_ctrl_creds--;
+ } else {
+ BUG_ON(file_ext->flow_ctrl_creds <= 0);
+ file_ext->flow_ctrl_creds--;
+ }
+ return;
+ }
+ }
+ BUG();
+}
+
+/**
+ * heci_send_flow_control - send flow control to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_flow_control *heci_flow_control;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_flow_control);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_flow_control = (struct hbm_flow_control *) &dev->wr_msg_buf[1];
+ memset(heci_flow_control, 0, sizeof(heci_flow_control));
+ heci_flow_control->host_addr = file_ext->host_client_id;
+ heci_flow_control->me_addr = file_ext->me_client_id;
+ heci_flow_control->cmd.cmd = HECI_FLOW_CONTROL_CMD;
+ memset(heci_flow_control->reserved, 0,
+ sizeof(heci_flow_control->reserved));
+ DBG("sending flow control host client = %d, me client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_flow_control,
+ sizeof(struct hbm_flow_control)))
+ return 0;
+
+ return 1;
+
+}
+
+/**
+ * other_client_is_connecting - check if other
+ * client with the same client id is connected.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if other client is connected, 0 - otherwise.
+ */
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if ((file_pos->state == HECI_FILE_CONNECTING)
+ && (file_pos != file_ext)
+ && file_ext->me_client_id == file_pos->me_client_id)
+ return 1;
+
+ }
+ return 0;
+}
+
+/**
+ * heci_send_wd - send watch dog message to fw.
+ *
+ * @dev: device object for our driver
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_send_wd(struct iamt_heci_device *dev)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = dev->wd_file_ext.host_client_id;
+ heci_hdr->me_addr = dev->wd_file_ext.me_client_id;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ if (!memcmp(dev->wd_data, interface_start_wd_params,
+ HECI_WD_PARAMS_SIZE)) {
+ heci_hdr->length = HECI_START_WD_DATA_SIZE;
+ } else {
+ BUG_ON(memcmp(dev->wd_data, interface_stop_wd_params,
+ HECI_WD_PARAMS_SIZE));
+ heci_hdr->length = HECI_WD_PARAMS_SIZE;
+ }
+
+ if (!heci_write_message(dev, heci_hdr, dev->wd_data, heci_hdr->length))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_disconnect - send disconnect message to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_disconnect_request *heci_cli_disconnect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_disconnect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_disconnect =
+ (struct hbm_client_disconnect_request *) &dev->wr_msg_buf[1];
+ memset(heci_cli_disconnect, 0, sizeof(heci_cli_disconnect));
+ heci_cli_disconnect->host_addr = file_ext->host_client_id;
+ heci_cli_disconnect->me_addr = file_ext->me_client_id;
+ heci_cli_disconnect->cmd.cmd = CLIENT_DISCONNECT_REQ_CMD;
+ heci_cli_disconnect->reserved[0] = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_disconnect,
+ sizeof(struct hbm_client_disconnect_request)))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_connect - send connect message to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * returns 1 if success, 0 - otherwise.
+ */
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_request *heci_cli_connect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_connect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_connect =
+ (struct hbm_client_connect_request *) &dev->wr_msg_buf[1];
+ heci_cli_connect->host_addr = file_ext->host_client_id;
+ heci_cli_connect->me_addr = file_ext->me_client_id;
+ heci_cli_connect->cmd.cmd = CLIENT_CONNECT_REQ_CMD;
+ heci_cli_connect->reserved = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_connect,
+ sizeof(struct hbm_client_connect_request)))
+ return 0;
+
+ return 1;
+}
diff --git a/drivers/char/heci/heci_interface.h b/drivers/char/heci/heci_interface.h
new file mode 100644
index 0000000..3b8557a
--- /dev/null
+++ b/drivers/char/heci/heci_interface.h
@@ -0,0 +1,170 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#ifndef _HECI_INTERFACE_H_
+#define _HECI_INTERFACE_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+
+#define HBM_MINOR_VERSION 0
+#define HBM_MAJOR_VERSION 1
+#define HBM_TIMEOUT 1 /* 1 second */
+
+
+#define HOST_START_REQ_CMD 0x01
+#define HOST_START_RES_CMD 0x81
+
+#define HOST_STOP_REQ_CMD 0x02
+#define HOST_STOP_RES_CMD 0x82
+
+#define ME_STOP_REQ_CMD 0x03
+
+#define HOST_ENUM_REQ_CMD 0x04
+#define HOST_ENUM_RES_CMD 0x84
+
+#define HOST_CLIENT_PROPERTEIS_REQ_CMD 0x05
+#define HOST_CLIENT_PROPERTEIS_RES_CMD 0x85
+
+#define CLIENT_CONNECT_REQ_CMD 0x06
+#define CLIENT_CONNECT_RES_CMD 0x86
+
+#define CLIENT_DISCONNECT_REQ_CMD 0x07
+#define CLIENT_DISCONNECT_RES_CMD 0x87
+
+#define HECI_FLOW_CONTROL_CMD 0x08
+
+
+#define AMT_WD_VALUE 120 /* seconds */
+
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+
+/* IOCTL commands */
+#define IOCTL_HECI_GET_VERSION \
+ _IOWR('H' , 0x0, struct heci_message_data)
+#define IOCTL_HECI_CONNECT_CLIENT \
+ _IOWR('H' , 0x01, struct heci_message_data)
+#define IOCTL_HECI_WD \
+ _IOWR('H' , 0x02, struct heci_message_data)
+#define IOCTL_HECI_BYPASS_WD \
+ _IOWR('H' , 0x10, struct heci_message_data)
+
+enum heci_stop_reason_types{
+ DRIVER_STOP_REQUEST = 0x00,
+ DEVICE_D1_ENTRY = 0x01,
+ DEVICE_D2_ENTRY = 0x02,
+ DEVICE_D3_ENTRY = 0x03,
+ SYSTEM_S1_ENTRY = 0x04,
+ SYSTEM_S2_ENTRY = 0x05,
+ SYSTEM_S3_ENTRY = 0x06,
+ SYSTEM_S4_ENTRY = 0x07,
+ SYSTEM_S5_ENTRY = 0x08
+};
+
+enum me_stop_reason_types{
+ FW_UPDATE = 0x00
+};
+
+enum client_connect_status_types{
+ CCS_SUCCESS = 0x00,
+ CCS_NOT_FOUND = 0x01,
+ CCS_ALREADY_STARTED = 0x02,
+ CCS_OUT_OF_RESOURCES = 0x03,
+ CCS_MESSAGE_SMALL = 0x04
+};
+
+enum client_disconnect_status_types{
+ CDS_SUCCESS = 0x00
+};
+
+
+/*
+ * heci interface function prototypes
+ */
+void heci_set_csr_register(struct iamt_heci_device *dev);
+void heci_csr_enable_interrupts(struct iamt_heci_device *dev);
+void heci_csr_disable_interrupts(struct iamt_heci_device *dev);
+
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length);
+
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length);
+
+int host_buffer_is_empty(struct iamt_heci_device *dev);
+
+__s32 count_full_read_slots(struct iamt_heci_device *dev);
+
+__s32 count_empty_write_slots(struct iamt_heci_device *dev);
+
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_wd(struct iamt_heci_device *dev);
+
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+#endif /* _HECI_INTERFACE_H_ */
diff --git a/drivers/char/heci/heci_main.c b/drivers/char/heci/heci_main.c
new file mode 100644
index 0000000..98efaa8
--- /dev/null
+++ b/drivers/char/heci/heci_main.c
@@ -0,0 +1,1559 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/device.h>
+#include <linux/unistd.h>
+#include <linux/kthread.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+#define HECI_READ_TIMEOUT 45
+
+#define HECI_DRIVER_NAME "heci"
+
+/*
+ * heci driver strings
+ */
+char heci_driver_name[] = HECI_DRIVER_NAME;
+char heci_driver_string[] = "Intel(R) Management Engine Interface";
+char heci_driver_version[] = HECI_DRIVER_VERSION;
+char heci_copyright[] = "Copyright (c) 2003 - 2008 Intel Corporation.";
+
+
+#ifdef HECI_DEBUG
+int heci_debug = 1;
+#else
+int heci_debug;
+#endif
+MODULE_PARM_DESC(heci_debug, "Debug enabled or not");
+module_param(heci_debug, int, 0644);
+
+
+#define HECI_DEV_NAME "heci"
+
+/* heci char device for registration */
+static struct cdev heci_cdev;
+
+/* major number for device */
+static int heci_major;
+/* The device pointer */
+static struct pci_dev *heci_device;
+
+struct class *heci_class;
+struct class_device *heci_class_dev;
+
+
+/* heci_pci_tbl - PCI Device ID Table */
+static struct pci_device_id heci_pci_tbl[] = {
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82946GZ)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82Q965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GM965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GME965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82G33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82X38)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_3200)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_6)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_7)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_8)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_9)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_10)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_4)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_4)},
+ /* required last entry */
+ {0, }
+};
+
+MODULE_DEVICE_TABLE(pci, heci_pci_tbl);
+
+/*
+ * Local Function Prototypes
+ */
+static int __init heci_init_module(void);
+static void __exit heci_exit_module(void);
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent);
+static void __devexit heci_remove(struct pci_dev *pdev);
+static int heci_open(struct inode *inode, struct file *file);
+static int heci_release(struct inode *inode, struct file *file);
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset);
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data);
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset);
+static unsigned int heci_poll(struct file *file, poll_table *wait);
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state);
+static int heci_resume(struct pci_dev *pdev);
+static __u16 g_sus_wd_timeout;
+#else
+#define heci_suspend NULL
+#define heci_resume NULL
+#endif
+/*
+ * PCI driver structure
+ */
+static struct pci_driver heci_driver = {
+ .name = heci_driver_name,
+ .id_table = heci_pci_tbl,
+ .probe = heci_probe,
+ .remove = __devexit_p(heci_remove),
+ .shutdown = __devexit_p(heci_remove),
+ .suspend = heci_suspend,
+ .resume = heci_resume
+};
+
+/*
+ * file operations structure will be use heci char device.
+ */
+static struct file_operations heci_fops = {
+ .owner = THIS_MODULE,
+ .read = heci_read,
+ .ioctl = heci_ioctl,
+ .open = heci_open,
+ .release = heci_release,
+ .write = heci_write,
+ .poll = heci_poll,
+};
+
+/**
+ * heci_registration_cdev - set up the cdev structure for heci device.
+ *
+ * @dev: char device struct
+ * @hminor: minor number for registration char device
+ * @fops: file operations structure
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_registration_cdev(struct cdev *dev, int hminor,
+ struct file_operations *fops)
+{
+ int ret, devno = MKDEV(heci_major, hminor);
+
+ cdev_init(dev, fops);
+ dev->owner = THIS_MODULE;
+ ret = cdev_add(dev, devno, 1);
+ /* Fail gracefully if need be */
+ if (ret) {
+ printk(KERN_ERR "heci: Error %d registering heci device %d\n",
+ ret, hminor);
+ }
+ return ret;
+}
+
+/* Display the version of heci driver. */
+static ssize_t version_show(struct class *dev, char *buf)
+{
+ return sprintf(buf, "%s %s.\n",
+ heci_driver_string, heci_driver_version);
+}
+
+static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
+
+/**
+ * heci_register_cdev - registers heci char device
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_register_cdev(void)
+{
+ int ret;
+ dev_t dev;
+
+ /* registration of char devices */
+ ret = alloc_chrdev_region(&dev, HECI_MINORS_BASE, HECI_MINORS_COUNT,
+ HECI_DRIVER_NAME);
+ if (ret) {
+ printk(KERN_ERR "heci: Error allocating char device region.\n");
+ return ret;
+ }
+
+ heci_major = MAJOR(dev);
+
+ ret = heci_registration_cdev(&heci_cdev, HECI_MINOR_NUMBER,
+ &heci_fops);
+ if (ret)
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+
+ return ret;
+}
+
+/**
+ * heci_unregister_cdev - unregisters heci char device
+ */
+static void heci_unregister_cdev(void)
+{
+ cdev_del(&heci_cdev);
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+}
+
+/**
+ * heci_sysfs_device_create - adds device entry to sysfs
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_sysfs_device_create(void)
+{
+ struct class *class;
+ void *tmphdev;
+ int err = 0;
+
+ class = class_create(THIS_MODULE, HECI_DRIVER_NAME);
+ if (IS_ERR(class)) {
+ err = PTR_ERR(class);
+ printk(KERN_ERR "heci: Error creating heci class.\n");
+ goto err_out;
+ }
+
+ err = class_create_file(class, &class_attr_version);
+ if (err) {
+ class_destroy(class);
+ printk(KERN_ERR "heci: Error creating heci class file.\n");
+ goto err_out;
+ }
+
+ tmphdev = (void *) device_create(class, NULL, heci_cdev.dev,
+ HECI_DEV_NAME);
+ if (IS_ERR(tmphdev)) {
+ err = PTR_ERR(tmphdev);
+ class_remove_file(class, &class_attr_version);
+ class_destroy(class);
+ goto err_out;
+ }
+
+ heci_class = class;
+err_out:
+ return err;
+}
+
+/**
+ * heci_sysfs_device_remove - unregisters the device entry on sysfs
+ */
+static void heci_sysfs_device_remove(void)
+{
+ if ((heci_class == NULL) || (IS_ERR(heci_class)))
+ return;
+
+ device_destroy(heci_class, heci_cdev.dev);
+ class_remove_file(heci_class, &class_attr_version);
+ class_destroy(heci_class);
+}
+
+/**
+ * heci_init_module - Driver Registration Routine
+ *
+ * heci_init_module is the first routine called when the driver is
+ * loaded. All it does is register with the PCI subsystem.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int __init heci_init_module(void)
+{
+ int ret = 0;
+
+ printk(KERN_INFO "heci: %s - version %s\n", heci_driver_string,
+ heci_driver_version);
+ printk(KERN_INFO "heci: %s\n", heci_copyright);
+
+ /* init pci module */
+ ret = pci_register_driver(&heci_driver);
+ if (ret < 0) {
+ printk(KERN_ERR "heci: Error registering driver.\n");
+ goto end;
+ }
+
+ ret = heci_register_cdev();
+ if (ret)
+ goto unregister_pci;
+
+ ret = heci_sysfs_device_create();
+ if (ret)
+ goto unregister_cdev;
+
+ return ret;
+
+unregister_cdev:
+ heci_unregister_cdev();
+unregister_pci:
+ pci_unregister_driver(&heci_driver);
+end:
+ return ret;
+}
+
+module_init(heci_init_module);
+
+
+/**
+ * heci_exit_module - Driver Exit Cleanup Routine
+ *
+ * heci_exit_module is called just before the driver is removed
+ * from memory.
+ */
+static void __exit heci_exit_module(void)
+{
+ pci_unregister_driver(&heci_driver);
+ heci_sysfs_device_remove();
+ heci_unregister_cdev();
+}
+
+module_exit(heci_exit_module);
+
+
+/**
+ * heci_probe - Device Initialization Routine
+ *
+ * @pdev: PCI device information struct
+ * @ent: entry in kcs_pci_tbl
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct iamt_heci_device *dev = NULL;
+ int i, err = 0;
+
+ if (heci_device) {
+ err = -EEXIST;
+ goto end;
+ }
+ /* enable pci dev */
+ err = pci_enable_device(pdev);
+ if (err) {
+ printk(KERN_ERR "heci: Failed to enable pci device.\n");
+ goto end;
+ }
+ /* set PCI host mastering */
+ pci_set_master(pdev);
+ /* pci request regions for heci driver */
+ err = pci_request_regions(pdev, heci_driver_name);
+ if (err) {
+ printk(KERN_ERR "heci: Failed to get pci regions.\n");
+ goto disable_device;
+ }
+ /* allocates and initializes the heci dev structure */
+ dev = init_heci_device(pdev);
+ if (!dev) {
+ err = -ENOMEM;
+ goto release_regions;
+ }
+ /* mapping IO device memory */
+ for (i = 0; i <= 5; i++) {
+ if (pci_resource_len(pdev, i) == 0)
+ continue;
+ if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
+ printk(KERN_ERR "heci: heci has IO ports.\n");
+ goto free_device;
+ } else if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
+ if (dev->mem_base) {
+ printk(KERN_ERR
+ "heci: Too many mem addresses.\n");
+ goto free_device;
+ }
+ dev->mem_base = pci_resource_start(pdev, i);
+ dev->mem_length = pci_resource_len(pdev, i);
+ }
+ }
+ if (!dev->mem_base) {
+ printk(KERN_ERR "heci: No address to use.\n");
+ err = -ENODEV;
+ goto free_device;
+ }
+ dev->mem_addr = ioremap_nocache(dev->mem_base,
+ dev->mem_length);
+ if (!dev->mem_addr) {
+ printk(KERN_ERR "heci: Remap IO device memory failure.\n");
+ err = -ENOMEM;
+ goto free_device;
+ }
+ /* request and enable interrupt */
+ err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, dev);
+ if (err) {
+ printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
+ pdev->irq);
+ goto unmap_memory;
+ }
+
+ if (heci_hw_init(dev)) {
+ printk(KERN_ERR "heci: Init hw failure.\n");
+ err = -ENODEV;
+ goto release_irq;
+ }
+ init_timer(&dev->wd_timer);
+
+ heci_initialize_clients(dev);
+ if (dev->heci_state != HECI_ENABLED) {
+ err = -ENODEV;
+ goto release_hw;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ heci_device = pdev;
+ pci_set_drvdata(pdev, dev);
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->wd_timeout)
+ mod_timer(&dev->wd_timer, jiffies);
+
+#ifdef CONFIG_PM
+ g_sus_wd_timeout = 0;
+#endif
+ printk(KERN_INFO "heci driver initialization successful.\n");
+ return 0;
+
+release_hw:
+ /* disable interrupts */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ heci_csr_disable_interrupts(dev);
+
+ del_timer_sync(&dev->wd_timer);
+
+ flush_scheduled_work();
+
+release_irq:
+ free_irq(pdev->irq, dev);
+unmap_memory:
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+free_device:
+ kfree(dev);
+release_regions:
+ pci_release_regions(pdev);
+disable_device:
+ pci_disable_device(pdev);
+end:
+ printk(KERN_ERR "heci driver initialization failed.\n");
+ return err;
+}
+
+/**
+ * heci_remove - Device Removal Routine
+ *
+ * @pdev: PCI device information struct
+ *
+ * heci_remove is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.
+ */
+static void __devexit heci_remove(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *dev = pci_get_drvdata(pdev);
+
+ if (heci_device != pdev)
+ return;
+
+ if (dev == NULL)
+ return;
+
+ spin_lock_bh(&dev->device_lock);
+ if (heci_device != pdev) {
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+
+ del_timer_sync(&dev->wd_timer);
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
+ && dev->wd_timeout) {
+ dev->wd_timeout = 0;
+ dev->wd_due_counter = 0;
+ memcpy(dev->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
+ dev->stop = 1;
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+
+ if (!heci_send_wd(dev))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+ } else {
+ dev->wd_pending = 1;
+ }
+ dev->wd_stoped = 0;
+ spin_unlock_bh(&dev->device_lock);
+
+ wait_event_interruptible_timeout(dev->wait_stop_wd,
+ (dev->wd_stoped), 10 * HZ);
+ spin_lock_bh(&dev->device_lock);
+ if (!dev->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else
+ DBG("stop wd complete.\n");
+
+ }
+
+ heci_device = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->iamthif_file_ext.state == HECI_FILE_CONNECTED) {
+ dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->iamthif_file_ext);
+ }
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED) {
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->wd_file_ext);
+ }
+
+ spin_lock_bh(&dev->device_lock);
+
+ /* remove entry if already in list */
+ DBG("list del iamthif and wd file list.\n");
+ heci_remove_client_from_file_list(dev, dev->wd_file_ext.
+ host_client_id);
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+
+ dev->iamthif_current_cb = NULL;
+ dev->iamthif_file_ext.file = NULL;
+ dev->num_heci_me_clients = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ flush_scheduled_work();
+
+ /* disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ free_irq(pdev->irq, dev);
+ pci_set_drvdata(pdev, NULL);
+
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+
+ kfree(dev);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+}
+
+/**
+ * heci_clear_list - remove all callbacks associated with file
+ * from heci_cb_list
+ *
+ * @file: file information struct
+ * @heci_cb_list: callbacks list
+ *
+ * heci_clear_list is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * returns 1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_list(struct iamt_heci_device *dev,
+ struct file *file, struct list_head *heci_cb_list)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private*priv_cb_next = NULL;
+ struct file *file_temp;
+ int rets = 0;
+
+ /* list all list member */
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ heci_cb_list, cb_list) {
+ file_temp = (struct file *)priv_cb_pos->file_object;
+ /* check if list member associated with a file */
+ if (file_temp == file) {
+ /* remove member from the list */
+ list_del(&priv_cb_pos->cb_list);
+ /* check if cb equal to current iamthif cb */
+ if (dev->iamthif_current_cb == priv_cb_pos) {
+ dev->iamthif_current_cb = NULL;
+ /* send flow control to iamthif client */
+ heci_send_flow_control(dev,
+ &dev->iamthif_file_ext);
+ }
+ /* free all allocated buffers */
+ heci_free_cb_private(priv_cb_pos);
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_clear_lists - remove all callbacks associated with file
+ *
+ * @dev: device information struct
+ * @file: file information struct
+ *
+ * heci_clear_lists is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * returns 1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_lists(struct iamt_heci_device *dev, struct file *file)
+{
+ int rets = 0;
+
+ /* remove callbacks associated with a file */
+ heci_clear_list(dev, file, &dev->pthi_cmd_list.heci_cb.cb_list);
+ if (heci_clear_list(dev, file,
+ &dev->pthi_read_complete_list.heci_cb.cb_list))
+ rets = 1;
+
+ heci_clear_list(dev, file, &dev->ctrl_rd_list.heci_cb.cb_list);
+
+ if (heci_clear_list(dev, file, &dev->ctrl_wr_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file,
+ &dev->write_waiting_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file, &dev->write_list.heci_cb.cb_list))
+ rets = 1;
+
+ /* check if iamthif_current_cb not NULL */
+ if (dev->iamthif_current_cb && (!rets)) {
+ /* check file and iamthif current cb association */
+ if (dev->iamthif_current_cb->file_object == file) {
+ /* remove cb */
+ heci_free_cb_private(dev->iamthif_current_cb);
+ dev->iamthif_current_cb = NULL;
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_open - the open function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ *
+ * returns 0 on success, <0 on error
+ */
+static int heci_open(struct inode *inode, struct file *file)
+{
+ struct heci_file_private *file_ext;
+ int if_num = iminor(inode);
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ file_ext = heci_alloc_file_private(file);
+ if (file_ext == NULL)
+ return -ENOMEM;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENODEV;
+ }
+ if (dev->open_handle_count >= HECI_MAX_OPEN_HANDLE_COUNT) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENFILE;
+ };
+ dev->open_handle_count++;
+ list_add_tail(&file_ext->link, &dev->file_list);
+ while ((dev->heci_host_clients[dev->current_host_client_id / 8]
+ & (1 << (dev->current_host_client_id % 8))) != 0) {
+
+ dev->current_host_client_id++; /* allow overflow */
+ DBG("current_host_client_id = %d\n",
+ dev->current_host_client_id);
+ DBG("dev->open_handle_count = %lu\n",
+ dev->open_handle_count);
+ }
+ DBG("current_host_client_id = %d\n", dev->current_host_client_id);
+ file_ext->host_client_id = dev->current_host_client_id;
+ dev->heci_host_clients[file_ext->host_client_id / 8] |=
+ (1 << (file_ext->host_client_id % 8));
+ spin_unlock_bh(&dev->device_lock);
+ spin_lock(&file_ext->file_lock);
+ file_ext->state = HECI_FILE_INITIALIZING;
+ file_ext->sm_state = 0;
+
+ file->private_data = file_ext;
+ spin_unlock(&file_ext->file_lock);
+
+ return 0;
+}
+
+/**
+ * heci_release - the release function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ *
+ * returns 0 on success, <0 on error
+ */
+static int heci_release(struct inode *inode, struct file *file)
+{
+ int rets = 0;
+ int if_num = iminor(inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext != &dev->iamthif_file_ext) {
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state == HECI_FILE_CONNECTED) {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ spin_unlock(&file_ext->file_lock);
+ DBG("disconnecting client host client = %d, "
+ "ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+ rets = heci_disconnect_host_client(dev, file_ext);
+ spin_lock(&file_ext->file_lock);
+ }
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_queues(dev, file_ext);
+ DBG("remove client host client = %d, ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ if (dev->open_handle_count > 0) {
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ dev->open_handle_count--;
+ }
+ heci_remove_client_from_file_list(dev,
+ file_ext->host_client_id);
+
+ /* free read cb */
+ if (file_ext->read_cb != NULL) {
+ priv_cb = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb != NULL)
+ list_del(&priv_cb->cb_list);
+
+ priv_cb = file_ext->read_cb;
+ file_ext->read_cb = NULL;
+ }
+
+ spin_unlock_bh(&dev->device_lock);
+ file->private_data = NULL;
+ spin_unlock(&file_ext->file_lock);
+
+ if (priv_cb != NULL)
+ heci_free_cb_private(priv_cb);
+
+ kfree(file_ext);
+ } else {
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->open_handle_count > 0)
+ dev->open_handle_count--;
+
+ if (dev->iamthif_file_object == file
+ && dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi canceled iamthif state %d\n",
+ dev->iamthif_state);
+ dev->iamthif_canceled = 1;
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE) {
+ DBG("run next pthi iamthif cb\n");
+ run_next_iamthif_cmd(dev);
+ }
+ }
+
+ if (heci_clear_lists(dev, file))
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+
+ spin_unlock_bh(&dev->device_lock);
+ }
+ return rets;
+}
+
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ struct heci_file_private *file_ext_list_temp;
+
+ if (dev->read_list.status == 0
+ && !list_empty(&dev->read_list.heci_cb.cb_list)) {
+ DBG("remove read_list CB \n");
+ list_for_each_entry_safe(priv_cb_pos,
+ priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+
+ file_ext_list_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext_list_temp != NULL) &&
+ heci_fe_same_id(file_ext, file_ext_list_temp))
+ return priv_cb_pos;
+
+ }
+ }
+ return NULL;
+}
+
+/**
+ * heci_read - the read client message function.
+ *
+ * @file: pointer to file structure
+ * @ubuf: pointer to user buffer
+ * @length: buffer length
+ * @offset: data offset in buffer
+ *
+ * returns >=0 data length on success , <0 on error
+ */
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int i;
+ int rets = 0, err = 0;
+ int if_num = iminor(file->f_dentry->d_inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ spin_lock(&file_ext->file_lock);
+ if ((file_ext->sm_state & HECI_WD_STATE_INDEPENDENCE_MSG_SENT) == 0) {
+ spin_unlock(&file_ext->file_lock);
+ /* Do not allow to read watchdog client */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_wd_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (file_ext->me_client_id ==
+ dev->me_clients[i].client_id)
+ return -EBADF;
+ }
+ }
+ } else {
+ file_ext->sm_state &= ~HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+ }
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ rets = pthi_read(dev, if_num, file, ubuf, length, offset);
+ goto out;
+ }
+
+ if (file_ext->read_cb && file_ext->read_cb->information > *offset) {
+ priv_cb = file_ext->read_cb;
+ goto copy_buffer;
+ } else if (file_ext->read_cb && file_ext->read_cb->information > 0 &&
+ file_ext->read_cb->information <= *offset) {
+ priv_cb = file_ext->read_cb;
+ rets = 0;
+ goto free;
+ } else if ((!file_ext->read_cb || file_ext->read_cb->information == 0)
+ && *offset > 0) {
+ /*Offset needs to be cleaned for contingous reads*/
+ *offset = 0;
+ rets = 0;
+ goto out;
+ }
+
+ spin_lock(&file_ext->read_io_lock);
+ err = heci_start_read(dev, if_num, file_ext);
+ if (err != 0 && err != -EBUSY) {
+ DBG("heci start read failure with status = %d\n", err);
+ spin_unlock(&file_ext->read_io_lock);
+ rets = err;
+ goto out;
+ }
+ if (HECI_READ_COMPLETE != file_ext->reading_state
+ && !waitqueue_active(&file_ext->rx_wait)) {
+ if (file->f_flags & O_NONBLOCK) {
+ rets = -EAGAIN;
+ spin_unlock(&file_ext->read_io_lock);
+ goto out;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+
+ if (wait_event_interruptible(file_ext->rx_wait,
+ (HECI_READ_COMPLETE == file_ext->reading_state
+ || HECI_FILE_INITIALIZING == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTING == file_ext->state))) {
+ if (signal_pending(current)) {
+ rets = -EINTR;
+ goto out;
+ }
+ return -ERESTARTSYS;
+ }
+
+ if (HECI_FILE_INITIALIZING == file_ext->state ||
+ HECI_FILE_DISCONNECTED == file_ext->state ||
+ HECI_FILE_DISCONNECTING == file_ext->state) {
+ rets = -EBUSY;
+ goto out;
+ }
+ spin_lock(&file_ext->read_io_lock);
+ }
+
+ priv_cb = file_ext->read_cb;
+
+ if (!priv_cb) {
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENODEV;
+ }
+ if (file_ext->reading_state != HECI_READ_COMPLETE) {
+ spin_unlock(&file_ext->read_io_lock);
+ return 0;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+ /* now copy the data to user space */
+copy_buffer:
+ DBG("priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("priv_cb->information - %lu\n",
+ priv_cb->information);
+ if (length == 0 || ubuf == NULL ||
+ *offset > priv_cb->information) {
+ rets = -EMSGSIZE;
+ goto free;
+ }
+
+ /* length is being turncated to PAGE_SIZE, however, */
+ /* information size may be longer */
+ length = (length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset));
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length)) {
+ rets = -EFAULT;
+ goto free;
+ }
+
+ rets = length;
+ *offset += length;
+ if ((unsigned long)*offset < priv_cb->information)
+ goto out;
+
+free:
+ spin_lock_bh(&dev->device_lock);
+ priv_cb_pos = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb_pos != NULL)
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_cb);
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+out: DBG("end heci read rets= %d\n", rets);
+ return rets;
+}
+
+/**
+ * heci_write - the write function.
+ *
+ * @file: pointer to file structure
+ * @ubuf: pointer to user buffer
+ * @length: buffer length
+ * @offset: data offset in buffer
+ *
+ * returns >=0 data length on success , <0 on error
+ */
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int rets = 0;
+ __u8 i;
+ int if_num = iminor(file->f_dentry->d_inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_write_cb = NULL;
+ struct heci_msg_hdr heci_hdr;
+ struct iamt_heci_device *dev;
+ unsigned long currtime = get_seconds();
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb = find_pthi_read_list_entry(dev, file);
+ if ((priv_write_cb != NULL) &&
+ (((currtime - priv_write_cb->read_time) >
+ IAMTHIF_READ_TIMER) ||
+ (file_ext->reading_state == HECI_READ_COMPLETE))) {
+ (*offset) = 0;
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ priv_write_cb = NULL;
+ }
+ }
+
+ /* free entry used in read */
+ if (file_ext->reading_state == HECI_READ_COMPLETE) {
+ *offset = 0;
+ priv_write_cb = find_read_list_entry(dev, file_ext);
+ if (priv_write_cb != NULL) {
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ priv_write_cb = NULL;
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+ }
+ } else if (file_ext->reading_state == HECI_IDLE &&
+ file_ext->read_pending == 0)
+ (*offset) = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ priv_write_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_write_cb)
+ return -ENOMEM;
+
+ priv_write_cb->file_object = file;
+ priv_write_cb->file_private = file_ext;
+ priv_write_cb->request_buffer.data = kmalloc(length, GFP_KERNEL);
+ if (!priv_write_cb->request_buffer.data) {
+ kfree(priv_write_cb);
+ return -ENOMEM;
+ }
+ DBG("length =%d\n", (int) length);
+
+ if (copy_from_user(priv_write_cb->request_buffer.data,
+ ubuf, length)) {
+ rets = -EFAULT;
+ goto fail;
+ }
+
+ spin_lock(&file_ext->file_lock);
+ file_ext->sm_state = 0;
+ if ((length == 4) &&
+ ((memcmp(heci_wd_state_independence_msg[0], ubuf, 4) == 0) ||
+ (memcmp(heci_wd_state_independence_msg[1], ubuf, 4) == 0) ||
+ (memcmp(heci_wd_state_independence_msg[2], ubuf, 4) == 0)))
+ file_ext->sm_state |= HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+
+ INIT_LIST_HEAD(&priv_write_cb->cb_list);
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb->response_buffer.data =
+ kmalloc(IAMTHIF_MTU, GFP_KERNEL);
+ if (!priv_write_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->iamthif_file_ext.me_client_id)
+ break;
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients) ||
+ (dev->me_clients[i].client_id !=
+ dev->iamthif_file_ext.me_client_id)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ } else if ((length > dev->me_clients[i].props.max_msg_length)
+ || (length <= 0)) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -EMSGSIZE;
+ goto fail;
+ }
+
+
+ priv_write_cb->response_buffer.size = IAMTHIF_MTU;
+ priv_write_cb->major_file_operations = HECI_IOCTL;
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+
+ if (!list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)
+ || dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi_state = %d\n", (int) dev->iamthif_state);
+ DBG("add PTHI cb to pthi cmd waiting list\n");
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->pthi_cmd_list.heci_cb.cb_list);
+ rets = length;
+ } else {
+ DBG("call pthi write\n");
+ rets = pthi_write(dev, priv_write_cb);
+
+ if (rets != 0) {
+ DBG("pthi write failed with status = %d\n",
+ rets);
+ spin_unlock_bh(&dev->device_lock);
+ goto fail;
+ }
+ rets = length;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+ }
+
+ priv_write_cb->major_file_operations = HECI_WRITE;
+ /* make sure information is zero before we start */
+
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+
+ spin_lock(&file_ext->write_io_lock);
+ DBG("host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (file_ext->state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ DBG("host client = %d, is not connected to ME client = %d",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ goto unlock;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ file_ext->me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if (i == dev->num_heci_me_clients) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+ if (length > dev->me_clients[i].props.max_msg_length || length <= 0) {
+ rets = -EINVAL;
+ goto unlock;
+ }
+ priv_write_cb->file_private = file_ext;
+
+ spin_lock_bh(&dev->device_lock);
+ if (flow_ctrl_creds(dev, file_ext) &&
+ dev->host_buffer_is_empty) {
+ spin_unlock_bh(&dev->device_lock);
+ dev->host_buffer_is_empty = 0;
+ if (length > ((((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr))) {
+
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) -
+ sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = length;
+ heci_hdr.msg_complete = 1;
+ }
+ heci_hdr.host_addr = file_ext->host_client_id;
+ heci_hdr.me_addr = file_ext->me_client_id;
+ heci_hdr.reserved = 0;
+ DBG("call heci_write_message header=%08x.\n",
+ *((__u32 *) &heci_hdr));
+ spin_unlock(&file_ext->write_io_lock);
+ /* protect heci low level write */
+ spin_lock_bh(&dev->device_lock);
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *) (priv_write_cb->request_buffer.data),
+ heci_hdr.length)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_write_cb);
+ rets = -ENODEV;
+ priv_write_cb->information = 0;
+ return rets;
+ }
+ file_ext->writing_state = HECI_WRITING;
+ priv_write_cb->information = heci_hdr.length;
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, file_ext);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ } else {
+
+ spin_unlock_bh(&dev->device_lock);
+ priv_write_cb->information = 0;
+ file_ext->writing_state = HECI_WRITING;
+ spin_unlock(&file_ext->write_io_lock);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return length;
+
+unlock:
+ spin_unlock(&file_ext->write_io_lock);
+fail:
+ heci_free_cb_private(priv_write_cb);
+ return rets;
+
+}
+
+/**
+ * heci_ioctl - the IOCTL function
+ *
+ * @inode: pointer to inode structure
+ * @file: pointer to file structure
+ * @cmd: ioctl command
+ * @data: pointer to heci message structure
+ *
+ * returns 0 on success , <0 on error
+ */
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data)
+{
+ int rets = 0;
+ int if_num = iminor(inode);
+ struct heci_file_private *file_ext = file->private_data;
+ /* in user space */
+ struct heci_message_data *u_msg = (struct heci_message_data *) data;
+ struct heci_message_data k_msg; /* all in kernel on the stack */
+ struct iamt_heci_device *dev;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ /* first copy from user all data needed */
+ if (copy_from_user(&k_msg, u_msg, sizeof(k_msg))) {
+ DBG("first copy from user all data needed filled\n");
+ return -EFAULT;
+ }
+ DBG("user message size is %d\n", k_msg.size);
+
+ switch (cmd) {
+ case IOCTL_HECI_GET_VERSION:
+ DBG(": IOCTL_HECI_GET_VERSION\n");
+ rets = heci_ioctl_get_version(dev, if_num, u_msg, k_msg,
+ file_ext);
+ break;
+
+ case IOCTL_HECI_CONNECT_CLIENT:
+ DBG(": IOCTL_HECI_CONNECT_CLIENT.\n");
+ rets = heci_ioctl_connect_client(dev, if_num, u_msg, k_msg,
+ file);
+ break;
+
+ case IOCTL_HECI_WD:
+ DBG(": IOCTL_HECI_WD.\n");
+ rets = heci_ioctl_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ case IOCTL_HECI_BYPASS_WD:
+ DBG(": IOCTL_HECI_BYPASS_WD.\n");
+ rets = heci_ioctl_bypass_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ default:
+ rets = -EINVAL;
+ break;
+ }
+ return rets;
+}
+
+/**
+ * heci_poll - the poll function
+ *
+ * @file: pointer to file structure
+ * @wait: pointer to poll_table structure
+ *
+ * returns poll mask
+ */
+static unsigned int heci_poll(struct file *file, poll_table *wait)
+{
+ int if_num = iminor(file->f_dentry->d_inode);
+ unsigned int mask = 0;
+ struct heci_file_private *file_ext = file->private_data;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return mask;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return mask;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return mask;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ poll_wait(file, &dev->iamthif_file_ext.wait, wait);
+ spin_lock(&dev->iamthif_file_ext.file_lock);
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE
+ && dev->iamthif_file_object == file) {
+ mask |= (POLLIN | POLLRDNORM);
+ spin_lock_bh(&dev->device_lock);
+ DBG("run next pthi cb\n");
+ run_next_iamthif_cmd(dev);
+ spin_unlock_bh(&dev->device_lock);
+ }
+ spin_unlock(&dev->iamthif_file_ext.file_lock);
+
+ } else{
+ poll_wait(file, &file_ext->tx_wait, wait);
+ spin_lock(&file_ext->write_io_lock);
+ if (HECI_WRITE_COMPLETE == file_ext->writing_state)
+ mask |= (POLLIN | POLLRDNORM);
+
+ spin_unlock(&file_ext->write_io_lock);
+ }
+
+ return mask;
+}
+
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct iamt_heci_device *device = pci_get_drvdata(pdev);
+ int err = 0;
+
+ spin_lock_bh(&device->device_lock);
+ if (device->reinit_tsk != NULL) {
+ kthread_stop(device->reinit_tsk);
+ device->reinit_tsk = NULL;
+ }
+ spin_unlock_bh(&device->device_lock);
+
+ /* Stop watchdog if exists */
+ del_timer_sync(&device->wd_timer);
+ if (device->wd_file_ext.state == HECI_FILE_CONNECTED
+ && device->wd_timeout) {
+ spin_lock_bh(&device->device_lock);
+ g_sus_wd_timeout = device->wd_timeout;
+ device->wd_timeout = 0;
+ device->wd_due_counter = 0;
+ memcpy(device->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
+ device->stop = 1;
+ if (device->host_buffer_is_empty &&
+ flow_ctrl_creds(device, &device->wd_file_ext)) {
+ device->host_buffer_is_empty = 0;
+ if (!heci_send_wd(device))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(device, &device->wd_file_ext);
+
+ device->wd_pending = 0;
+ } else {
+ device->wd_pending = 1;
+ }
+ spin_unlock_bh(&device->device_lock);
+ device->wd_stoped = 0;
+
+ err = wait_event_interruptible_timeout(device->wait_stop_wd,
+ (device->wd_stoped),
+ 10 * HZ);
+ if (!device->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else {
+ DBG("stop wd complete %d.\n", err);
+ err = 0;
+ }
+ }
+ /* Set new heci state */
+ spin_lock_bh(&device->device_lock);
+ if (device->heci_state == HECI_ENABLED ||
+ device->heci_state == HECI_RECOVERING_FROM_RESET) {
+ device->heci_state = HECI_POWER_DOWN;
+ heci_reset(device, 0);
+ }
+ spin_unlock_bh(&device->device_lock);
+
+ pci_save_state(pdev);
+
+ pci_disable_device(pdev);
+ free_irq(pdev->irq, device);
+
+ pci_set_power_state(pdev, PCI_D3hot);
+
+ return err;
+}
+
+static int heci_resume(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *device;
+ int err = 0;
+
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+
+ device = pci_get_drvdata(pdev);
+ if (!device)
+ return -ENODEV;
+
+ /* request and enable interrupt */
+ err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, device);
+ if (err) {
+ printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
+ pdev->irq);
+ return err;
+ }
+
+ spin_lock_bh(&device->device_lock);
+ device->heci_state = HECI_POWER_UP;
+ heci_reset(device, 1);
+ spin_unlock_bh(&device->device_lock);
+
+ /* Start watchdog if stopped in suspend */
+ if (g_sus_wd_timeout != 0) {
+ device->wd_timeout = g_sus_wd_timeout;
+
+ memcpy(device->wd_data, start_wd_params, HECI_WD_PARAMS_SIZE);
+ memcpy(device->wd_data + HECI_WD_PARAMS_SIZE,
+ &device->wd_timeout, sizeof(__u16));
+ device->wd_due_counter = 1;
+
+ if (device->wd_timeout)
+ mod_timer(&device->wd_timer, jiffies);
+
+ g_sus_wd_timeout = 0;
+ }
+ return err;
+}
+#endif
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(HECI_DRIVER_VERSION);
diff --git a/drivers/char/heci/heci_version.h b/drivers/char/heci/heci_version.h
new file mode 100644
index 0000000..797e84e
--- /dev/null
+++ b/drivers/char/heci/heci_version.h
@@ -0,0 +1,54 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef HECI_VERSION_H
+#define HECI_VERSION_H
+
+#define MAJOR_VERSION 5
+#define MINOR_VERSION 0
+#define QUICK_FIX_NUMBER 0
+#define VER_BUILD 30
+
+#define HECI_DRV_VER1 __stringify(MAJOR_VERSION) "." __stringify(MINOR_VERSION)
+#define HECI_DRV_VER2 __stringify(QUICK_FIX_NUMBER) "." __stringify(VER_BUILD)
+
+#define HECI_DRIVER_VERSION HECI_DRV_VER1 "." HECI_DRV_VER2
+
+#endif
diff --git a/drivers/char/heci/interrupt.c b/drivers/char/heci/interrupt.c
new file mode 100644
index 0000000..e575141
--- /dev/null
+++ b/drivers/char/heci/interrupt.c
@@ -0,0 +1,1553 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/kthread.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+
+/*
+ * interrupt function prototypes
+ */
+static void heci_bh_handler(struct work_struct *work);
+static int heci_bh_read_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static int heci_bh_write_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *connect_res);
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *disconnect_res);
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control);
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req);
+
+
+/**
+ * heci_isr_interrupt - The ISR of the HECI device
+ *
+ * @irq: The irq number
+ * @dev_id: pointer to the device structure
+ *
+ * returns irqreturn_t
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id)
+{
+ int err;
+ struct iamt_heci_device *device = (struct iamt_heci_device *) dev_id;
+
+ device->host_hw_state = read_heci_register(device, H_CSR);
+
+ if ((device->host_hw_state & H_IS) != H_IS)
+ return IRQ_NONE;
+
+ /* disable interrupts */
+ heci_csr_disable_interrupts(device);
+
+ /*
+ * Our device interrupted, schedule work the heci_bh_handler
+ * to handle the interrupt processing. This needs to be a
+ * workqueue item since the handler can sleep.
+ */
+ PREPARE_WORK(&device->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler.\n");
+ err = schedule_work(&device->work);
+ if (!err) {
+ printk(KERN_ERR "heci: schedule the heci_bh_handler"
+ " failed error=%x\n", err);
+ }
+ return IRQ_HANDLED;
+}
+
+/**
+ * _heci_cmpl - process completed operation.
+ *
+ * @file_ext: private data of the file object.
+ * @priv_cb_pos: callback block.
+ */
+static void _heci_cmpl(struct heci_file_private *file_ext,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (priv_cb_pos->major_file_operations == HECI_WRITE) {
+ heci_free_cb_private(priv_cb_pos);
+ DBG("completing write call back.\n");
+ file_ext->writing_state = HECI_WRITE_COMPLETE;
+ if ((&file_ext->tx_wait) &&
+ waitqueue_active(&file_ext->tx_wait))
+ wake_up_interruptible(&file_ext->tx_wait);
+
+ } else if (priv_cb_pos->major_file_operations == HECI_READ
+ && HECI_READING == file_ext->reading_state) {
+ DBG("completing read call back information= %lu\n",
+ priv_cb_pos->information);
+ file_ext->reading_state = HECI_READ_COMPLETE;
+ if ((&file_ext->rx_wait) &&
+ waitqueue_active(&file_ext->rx_wait))
+ wake_up_interruptible(&file_ext->rx_wait);
+
+ }
+}
+
+/**
+ * _heci_cmpl_iamthif - process completed iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @priv_cb_pos: callback block.
+ */
+static void _heci_cmpl_iamthif(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (dev->iamthif_canceled != 1) {
+ dev->iamthif_state = HECI_IAMTHIF_READ_COMPLETE;
+ dev->iamthif_stall_timer = 0;
+ memcpy(priv_cb_pos->response_buffer.data,
+ dev->iamthif_msg_buf,
+ dev->iamthif_msg_buf_index);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->pthi_read_complete_list.heci_cb.cb_list);
+ DBG("pthi read completed.\n");
+ } else {
+ run_next_iamthif_cmd(dev);
+ }
+ if (&dev->iamthif_file_ext.wait) {
+ DBG("completing pthi call back.\n");
+ wake_up_interruptible(&dev->iamthif_file_ext.wait);
+ }
+}
+/**
+ * heci_bh_handler - function called after ISR to handle the interrupt
+ * processing.
+ *
+ * @work: pointer to the work structure
+ *
+ * NOTE: This function is called by schedule work
+ */
+static void heci_bh_handler(struct work_struct *work)
+{
+ struct iamt_heci_device *dev =
+ container_of(work, struct iamt_heci_device, work);
+ struct io_heci_list complete_list;
+ __s32 slots;
+ int rets;
+ struct heci_cb_private *cb_pos = NULL, *cb_next = NULL;
+ struct heci_file_private *file_ext;
+ int bus_message_received = 0;
+ struct task_struct *tsk;
+
+ DBG("function called after ISR to handle the interrupt processing.\n");
+ /* initialize our complete list */
+ spin_lock_bh(&dev->device_lock);
+ heci_initialize_list(&complete_list, dev);
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ /* check if ME wants a reset */
+ if (((dev->me_hw_state & ME_RDY_HRA) == 0)
+ && (dev->heci_state != HECI_RESETING)
+ && (dev->heci_state != HECI_INITIALIZING)) {
+ DBG("FW not ready.\n");
+ heci_reset(dev, 1);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ /* check if we need to start the dev */
+ if ((dev->host_hw_state & H_RDY) == 0) {
+ if ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA) {
+ DBG("we need to start the dev.\n");
+ dev->host_hw_state |= (H_IE | H_IG | H_RDY);
+ heci_set_csr_register(dev);
+ if (dev->heci_state == HECI_INITIALIZING) {
+ dev->recvd_msg = 1;
+ spin_unlock_bh(&dev->device_lock);
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ return;
+
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ tsk = kthread_run(heci_task_initialize_clients,
+ dev, "heci_reinit");
+ if (IS_ERR(tsk)) {
+ int rc = PTR_ERR(tsk);
+ printk(KERN_WARNING "heci: Unable to"
+ "start the heci thread: %d\n", rc);
+ }
+ return;
+ }
+ } else {
+ DBG("enable interrupt FW not ready.\n");
+ heci_csr_enable_interrupts(dev);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ }
+ /* check slots avalable for reading */
+ slots = count_full_read_slots(dev);
+ DBG("slots =%08x extra_write_index =%08x.\n",
+ slots, dev->extra_write_index);
+ while ((slots > 0) && (!dev->extra_write_index)) {
+ DBG("slots =%08x extra_write_index =%08x.\n", slots,
+ dev->extra_write_index);
+ DBG("call heci_bh_read_handler.\n");
+ rets = heci_bh_read_handler(&complete_list, dev, &slots);
+ if (rets != 0)
+ goto end;
+ }
+ rets = heci_bh_write_handler(&complete_list, dev, &slots);
+end:
+ DBG("end of bottom half function.\n");
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ /* acknowledge interrupt and disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ PREPARE_WORK(&dev->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler.\n");
+ rets = schedule_work(&dev->work);
+ if (!rets) {
+ printk(KERN_ERR "heci: schedule the heci_bh_handler"
+ " failed error=%x\n", rets);
+ }
+ } else {
+ heci_csr_enable_interrupts(dev);
+ }
+
+ if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) {
+ DBG("received waiting bus message\n");
+ bus_message_received = 1;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ if (bus_message_received) {
+ DBG("wake up dev->wait_recvd_msg\n");
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ bus_message_received = 0;
+ }
+ if ((complete_list.status != 0)
+ || list_empty(&complete_list.heci_cb.cb_list))
+ return;
+
+
+ list_for_each_entry_safe(cb_pos, cb_next,
+ &complete_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)cb_pos->file_private;
+ list_del(&cb_pos->cb_list);
+ if (file_ext != NULL) {
+ if (file_ext != &dev->iamthif_file_ext) {
+ DBG("completing call back.\n");
+ _heci_cmpl(file_ext, cb_pos);
+ cb_pos = NULL;
+ } else if (file_ext == &dev->iamthif_file_ext) {
+ _heci_cmpl_iamthif(dev, cb_pos);
+ }
+ }
+ }
+}
+
+
+/**
+ * heci_bh_read_handler - bottom half read routine after ISR to
+ * handle the read processing.
+ *
+ * @cmpl_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @slots: slots to read.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+ struct heci_msg_hdr *heci_hdr;
+ int ret = 0;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (!dev->rd_msg_hdr) {
+ dev->rd_msg_hdr = read_heci_register(dev, ME_CB_RW);
+ DBG("slots=%08x.\n", *slots);
+ (*slots)--;
+ DBG("slots=%08x.\n", *slots);
+ }
+ heci_hdr = (struct heci_msg_hdr *) &dev->rd_msg_hdr;
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+
+ if ((heci_hdr->reserved) || !(dev->rd_msg_hdr)) {
+ DBG("corrupted message header.\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+
+ if ((heci_hdr->host_addr) || (heci_hdr->me_addr)) {
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe read host"
+ " client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ if ((file_pos->host_client_id == heci_hdr->host_addr)
+ && (file_pos->me_client_id == heci_hdr->me_addr))
+ break;
+ }
+
+ if (&file_pos->link == &dev->file_list) {
+ DBG("corrupted message header\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+ }
+ if (((*slots) * sizeof(__u32)) < heci_hdr->length) {
+ DBG("we can't read the message slots=%08x.\n", *slots);
+ /* we can't read the message */
+ ret = -ERANGE;
+ goto end;
+ }
+
+ /* decide where to read the message too */
+ if (!heci_hdr->host_addr) {
+ DBG("call heci_bh_read_bus_message.\n");
+ heci_bh_read_bus_message(dev, heci_hdr);
+ DBG("end heci_bh_read_bus_message.\n");
+ } else if ((heci_hdr->host_addr == dev->iamthif_file_ext.host_client_id)
+ && (HECI_FILE_CONNECTED == dev->iamthif_file_ext.state)
+ && (dev->iamthif_state == HECI_IAMTHIF_READING)) {
+ DBG("call heci_bh_read_iamthif_message.\n");
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ ret = heci_bh_read_pthi_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ } else {
+ DBG("call heci_bh_read_client_message.\n");
+ ret = heci_bh_read_client_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ }
+
+ /* reset the number of slots and header */
+ *slots = count_full_read_slots(dev);
+ dev->rd_msg_hdr = 0;
+
+ if (*slots == -ESLOTS_OVERFLOW) {
+ /* overflow - reset */
+ DBG("reseting due to slots overflow.\n");
+ /* set the event since message has been read */
+ ret = -ERANGE;
+ goto end;
+ }
+end:
+ return ret;
+}
+
+
+/**
+ * heci_bh_read_bus_message - bottom half read routine after ISR to
+ * handle the read bus message cmd processing.
+ *
+ * @dev: Device object for our driver
+ * @heci_hdr: header of bus message
+ */
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_bus_message *heci_msg;
+ struct hbm_host_version_response *version_res;
+ struct hbm_client_connect_response *connect_res;
+ struct hbm_client_connect_response *disconnect_res;
+ struct hbm_flow_control *flow_control;
+ struct hbm_props_response *props_res;
+ struct hbm_host_enum_response *enum_res;
+ struct hbm_client_disconnect_request *disconnect_req;
+ struct hbm_host_stop_request *h_stop_req;
+ int i;
+ unsigned char *buffer;
+
+ /* read the message to our buffer */
+ buffer = (unsigned char *) dev->rd_msg_buf;
+ BUG_ON(heci_hdr->length >= sizeof(dev->rd_msg_buf));
+ heci_read_slots(dev, buffer, heci_hdr->length);
+ heci_msg = (struct heci_bus_message *) buffer;
+
+ switch (*(__u8 *) heci_msg) {
+ case HOST_START_RES_CMD:
+ version_res = (struct hbm_host_version_response *) heci_msg;
+ if (version_res->host_version_supported) {
+ dev->version.major_version = HBM_MAJOR_VERSION;
+ dev->version.minor_version = HBM_MINOR_VERSION;
+ } else {
+ dev->version = version_res->me_max_version;
+ }
+ dev->recvd_msg = 1;
+ DBG("host start response message received.\n");
+ break;
+
+ case CLIENT_CONNECT_RES_CMD:
+ connect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_connect_response(dev, connect_res);
+ DBG("client connect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case CLIENT_DISCONNECT_RES_CMD:
+ disconnect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_disconnect_response(dev, disconnect_res);
+ DBG("client disconnect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case HECI_FLOW_CONTROL_CMD:
+ flow_control = (struct hbm_flow_control *) heci_msg;
+ heci_client_flow_control_response(dev, flow_control);
+ DBG("client flow control response message received.\n");
+ break;
+
+ case HOST_CLIENT_PROPERTEIS_RES_CMD:
+ props_res = (struct hbm_props_response *) heci_msg;
+ if (props_res->status != 0) {
+ BUG();
+ break;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ props_res->address) {
+ dev->me_clients[i].props =
+ props_res->client_properties;
+ break;
+ }
+
+ }
+ dev->recvd_msg = 1;
+ break;
+
+ case HOST_ENUM_RES_CMD:
+ enum_res = (struct hbm_host_enum_response *) heci_msg;
+ memcpy(dev->heci_me_clients, enum_res->valid_addresses, 32);
+ dev->recvd_msg = 1;
+ break;
+
+ case HOST_STOP_RES_CMD:
+ dev->heci_state = HECI_DISABLED;
+ DBG("reseting because of FW stop response.\n");
+ heci_reset(dev, 1);
+ break;
+
+ case CLIENT_DISCONNECT_REQ_CMD:
+ /* search for client */
+ disconnect_req =
+ (struct hbm_client_disconnect_request *) heci_msg;
+ heci_client_disconnect_request(dev, disconnect_req);
+ break;
+
+ case ME_STOP_REQ_CMD:
+ /* prepare stop request */
+ heci_hdr = (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ h_stop_req =
+ (struct hbm_host_stop_request *) &dev->ext_msg_buf[1];
+ memset(h_stop_req, 0, sizeof(struct hbm_host_stop_request));
+ h_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ h_stop_req->reason = DRIVER_STOP_REQUEST;
+ h_stop_req->reserved[0] = 0;
+ h_stop_req->reserved[1] = 0;
+ dev->extra_write_index = 2;
+ break;
+
+ default:
+ BUG();
+ break;
+
+ }
+}
+
+/**
+ * heci_bh_read_pthi_message - bottom half read routine after ISR to
+ * handle the read pthi message data processing.
+ *
+ * @complete_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @heci_hdr: header of pthi message
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb;
+ unsigned char *buffer;
+
+ BUG_ON(heci_hdr->me_addr != dev->iamthif_file_ext.me_client_id);
+ BUG_ON(dev->iamthif_state != HECI_IAMTHIF_READING);
+
+ buffer = (unsigned char *) (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index);
+ BUG_ON(sizeof(dev->iamthif_msg_buf) <
+ (dev->iamthif_msg_buf_index + heci_hdr->length));
+
+ heci_read_slots(dev, buffer, heci_hdr->length);
+
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+
+ if (!(heci_hdr->msg_complete))
+ return 0;
+
+ DBG("pthi_message_buffer_index=%d\n", heci_hdr->length);
+ DBG("completed pthi read.\n ");
+ if (!dev->iamthif_current_cb)
+ return -ENODEV;
+
+ priv_cb = dev->iamthif_current_cb;
+ dev->iamthif_current_cb = NULL;
+
+ file_ext = (struct heci_file_private *)priv_cb->file_private;
+ if (!file_ext)
+ return -ENODEV;
+
+ dev->iamthif_stall_timer = 0;
+ priv_cb->information = dev->iamthif_msg_buf_index;
+ priv_cb->read_time = get_seconds();
+ if ((dev->iamthif_ioctl) && (file_ext == &dev->iamthif_file_ext)) {
+ /* found the iamthif cb */
+ DBG("complete the pthi read cb.\n ");
+ if (&dev->iamthif_file_ext) {
+ DBG("add the pthi read cb to complete.\n ");
+ list_add_tail(&priv_cb->cb_list,
+ &complete_list->heci_cb.cb_list);
+ }
+ }
+ return 0;
+}
+
+/**
+ * _heci_bh_state_ok - check if heci header matches file private data
+ *
+ * @file_ext: private data of the file object
+ * @heci_hdr: header of heci client message
+ *
+ * returns !=0 if matches, 0 if no match.
+ */
+static int _heci_bh_state_ok(struct heci_file_private *file_ext,
+ struct heci_msg_hdr *heci_hdr)
+{
+ return ((file_ext->host_client_id == heci_hdr->host_addr)
+ && (file_ext->me_client_id == heci_hdr->me_addr)
+ && (file_ext->state == HECI_FILE_CONNECTED)
+ && (HECI_READ_COMPLETE != file_ext->reading_state));
+}
+
+/**
+ * heci_bh_read_client_message - bottom half read routine after ISR to
+ * handle the read heci client message data processing.
+ *
+ * @complete_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @heci_hdr: header of heci client message
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ unsigned char *buffer = NULL;
+
+ DBG("start client msg\n");
+ if (!((dev->read_list.status == 0) &&
+ !list_empty(&dev->read_list.heci_cb.cb_list)))
+ goto quit;
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if ((file_ext != NULL) &&
+ (_heci_bh_state_ok(file_ext, heci_hdr))) {
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_READING;
+ buffer = (unsigned char *)
+ (priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information);
+ BUG_ON(priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information);
+
+ if (priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information) {
+ DBG("message overflow.\n");
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENOMEM;
+ }
+ if (buffer) {
+ heci_read_slots(dev, buffer,
+ heci_hdr->length);
+ }
+ priv_cb_pos->information += heci_hdr->length;
+ if (heci_hdr->msg_complete) {
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ DBG("completed read host client = %d,"
+ "ME client = %d, "
+ "data length = %lu\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id,
+ priv_cb_pos->information);
+
+ *(priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information) = '\0';
+ DBG("priv_cb_pos->res_buffer - %s\n",
+ priv_cb_pos->response_buffer.data);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &complete_list->heci_cb.cb_list);
+ } else {
+ spin_unlock(&file_ext->read_io_lock);
+ }
+
+ break;
+ }
+
+ }
+
+quit:
+ DBG("message read\n");
+ if (!buffer) {
+ heci_read_slots(dev, (unsigned char *) dev->rd_msg_buf,
+ heci_hdr->length);
+ DBG("discarding message, header=%08x.\n",
+ *(__u32 *) dev->rd_msg_buf);
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_iamthif_read - prepare to read iamthif data.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_iamthif_read(struct iamt_heci_device *dev, __s32 *slots)
+{
+
+ if (((*slots) * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr)
+ + sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, &dev->iamthif_file_ext)) {
+ DBG("iamthif flow control failed\n");
+ } else {
+ DBG("iamthif flow control success\n");
+ dev->iamthif_state = HECI_IAMTHIF_READING;
+ dev->iamthif_flow_control_pending = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_stall_timer = IAMTHIF_STALL_TIMER;
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+ }
+ return 0;
+ } else {
+ return -ECOMPLETE_MESSAGE;
+ }
+}
+
+/**
+ * _heci_bh_close - process close related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_close(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request) + 3) / 4;
+
+ if (!heci_disconnect(dev, file_ext)) {
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_hb_close - process read related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_read(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+
+/**
+ * _heci_bh_ioctl - process ioctl related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_ioctl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request))) {
+ file_ext->state = HECI_FILE_CONNECTING;
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request) + 3) / 4;
+ if (!heci_connect(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl - process completed and no-iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ (priv_cb_pos->request_buffer.size -
+ priv_cb_pos->information))) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = ((priv_cb_pos->request_buffer.size) -
+ (priv_cb_pos->information));
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ "heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n",
+ heci_hdr->length);
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ file_ext->status = 0;
+ priv_cb_pos->information += heci_hdr->length;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ (*slots) -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ priv_cb_pos->information += heci_hdr->length;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ " heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl_iamthif - process completed iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * returns 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl_iamthif(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ dev->iamthif_msg_buf_size -
+ dev->iamthif_msg_buf_index)) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = dev->iamthif_msg_buf_size -
+ dev->iamthif_msg_buf_index;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index),
+ heci_hdr->length)) {
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+ priv_cb_pos->information = dev->iamthif_msg_buf_index;
+ file_ext->status = 0;
+ dev->iamthif_state = HECI_IAMTHIF_FLOW_CONTROL;
+ dev->iamthif_flow_control_pending = 1;
+ /* save iamthif cb sent to pthi client */
+ dev->iamthif_current_cb = priv_cb_pos;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ } else {
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * heci_bh_write_handler - bottom half write routine after
+ * ISR to handle the write processing.
+ *
+ * @cmpl_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @slots: slots to write.
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int heci_bh_write_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ struct io_heci_list *list;
+ int ret;
+
+ if (!host_buffer_is_empty(dev)) {
+ DBG("host buffer is not empty.\n");
+ return 0;
+ }
+ dev->write_hang = -1;
+ *slots = count_empty_write_slots(dev);
+ /* complete all waiting for write CB */
+ DBG("complete all waiting for write cb.\n");
+
+ list = &dev->write_waiting_list;
+ if ((list->status == 0)
+ && !list_empty(&list->heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &list->heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext != NULL) {
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ if ((HECI_WRITING == file_ext->writing_state) &&
+ (priv_cb_pos->major_file_operations ==
+ HECI_WRITING) &&
+ (file_ext != &dev->iamthif_file_ext)) {
+ DBG("HECI WRITE COMPLETE\n");
+ file_ext->writing_state =
+ HECI_WRITE_COMPLETE;
+ list_add_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ }
+ if (file_ext == &dev->iamthif_file_ext) {
+ DBG("check iamthif flow control.\n");
+ if (dev->iamthif_flow_control_pending) {
+ ret = _heci_bh_iamthif_read(dev,
+ slots);
+ if (ret != 0)
+ return ret;
+ }
+ }
+ }
+
+ }
+ }
+
+ if ((dev->stop) && (!dev->wd_pending)) {
+ dev->wd_stoped = 1;
+ wake_up_interruptible(&dev->wait_stop_wd);
+ return 0;
+ }
+
+ if (dev->extra_write_index != 0) {
+ DBG("extra_write_index =%d.\n", dev->extra_write_index);
+ heci_write_message(dev,
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0],
+ (unsigned char *) &dev->ext_msg_buf[1],
+ (dev->extra_write_index - 1) * sizeof(__u32));
+ *slots -= dev->extra_write_index;
+ dev->extra_write_index = 0;
+ }
+ if (dev->heci_state == HECI_ENABLED) {
+ if ((dev->wd_pending)
+ && flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ if (!heci_send_wd(dev))
+ DBG("wd send failed.\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+
+ if (dev->wd_timeout != 0) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_START_WD_DATA_SIZE + 3) / 4;
+ dev->wd_due_counter = 2;
+ } else {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_WD_PARAMS_SIZE + 3) / 4;
+ dev->wd_due_counter = 0;
+ }
+
+ }
+ }
+ if (dev->stop)
+ return ~ENODEV;
+
+ /* complete control write list CB */
+ if (dev->ctrl_wr_list.status == 0) {
+ /* complete control write list CB */
+ DBG("complete control write list cb.\n");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_wr_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ }
+ switch (priv_cb_pos->major_file_operations) {
+ case HECI_CLOSE:
+ /* send disconnect message */
+ ret = _heci_bh_close(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_READ:
+ /* send flow control message */
+ ret = _heci_bh_read(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_IOCTL:
+ /* connect message */
+ if (!other_client_is_connecting(dev, file_ext))
+ continue;
+ ret = _heci_bh_ioctl(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+
+ default:
+ BUG();
+ }
+
+ }
+ }
+ /* complete write list CB */
+ if ((dev->write_list.status == 0)
+ && !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ DBG("complete write list cb.\n");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (file_ext != NULL) {
+ if (file_ext != &dev->iamthif_file_ext) {
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control"
+ " credentials for client"
+ " %d, not sending.\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl(dev, slots,
+ priv_cb_pos,
+ file_ext,
+ cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ } else if (file_ext == &dev->iamthif_file_ext) {
+ /* IAMTHIF IOCTL */
+ DBG("complete pthi write cb.\n");
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control"
+ " credentials for pthi"
+ " client %d.\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl_iamthif(dev, slots,
+ priv_cb_pos,
+ file_ext,
+ cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ }
+ }
+
+ }
+ }
+ return 0;
+}
+
+
+/**
+ * is_treat_specially_client - check if the message belong
+ * to the file private data.
+ *
+ * @file_ext: private data of the file object
+ * @rs: connect response bus message
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+static int is_treat_specially_client(struct heci_file_private *file_ext,
+ struct hbm_client_connect_response *rs)
+{
+ int ret = 0;
+
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+ if (rs->status == 0) {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_CONNECTED;
+ file_ext->status = 0;
+ } else {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_DISCONNECTED;
+ file_ext->status = -ENODEV;
+ }
+ ret = 1;
+ }
+ DBG("client state = %d.\n", file_ext->state);
+ return ret;
+}
+
+/**
+ * heci_client_connect_response - connect response bh routine
+ *
+ * @dev: Device object for our driver
+ * @rs: connect response bus message
+ */
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ /* if WD or iamthif client treat specially */
+
+ if ((is_treat_specially_client(&(dev->wd_file_ext), rs)) ||
+ (is_treat_specially_client(&(dev->iamthif_file_ext), rs)))
+ return;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+ if (HECI_IOCTL == priv_cb_pos->major_file_operations) {
+ if (is_treat_specially_client(file_ext, rs)) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+ }
+}
+
+/**
+ * heci_client_disconnect_response - disconnect response bh routine
+ *
+ * @dev: Device object for our driver
+ * @rs: disconnect response bus message
+ */
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+
+ DBG("list_for_each_entry_safe in ctrl_rd_list.\n");
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+
+ list_del(&priv_cb_pos->cb_list);
+ if (rs->status == 0) {
+ file_ext->state =
+ HECI_FILE_DISCONNECTED;
+ }
+
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_flow_addr - tell they have same address.
+ *
+ * @file: private data of the file object.
+ * @flow: flow control.
+ *
+ * returns !=0, same; 0,not.
+ */
+static int same_flow_addr(struct heci_file_private *file,
+ struct hbm_flow_control *flow)
+{
+ return ((file->host_client_id == flow->host_addr)
+ && (file->me_client_id == flow->me_addr));
+}
+
+/**
+ * add_single_flow_creds - add single buffer credentials.
+ *
+ * @file: private data ot the file object.
+ * @flow: flow control.
+ */
+static void add_single_flow_creds(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow)
+{
+ struct heci_me_client *client;
+ int i;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ client = &dev->me_clients[i];
+ if ((client != NULL) &&
+ (flow->me_addr == client->client_id)) {
+ if (client->props.single_recv_buf != 0) {
+ client->flow_ctrl_creds++;
+ DBG("recv flow ctrl msg ME %d (single).\n",
+ flow->me_addr);
+ DBG("flow control credentials=%d.\n",
+ client->flow_ctrl_creds);
+ } else {
+ BUG(); /* error in flow control */
+ }
+ }
+ }
+}
+
+/**
+ * heci_client_flow_control_response - flow control response bh routine
+ *
+ * @dev: Device object for our driver
+ * @flow_control: flow control response bus message
+ */
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (flow_control->host_addr == 0) {
+ /* single receive buffer */
+ add_single_flow_creds(dev, flow_control);
+ } else {
+ /* normal connection */
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe in file_list\n");
+
+ DBG("file_ext of host client %d ME client %d.\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ DBG("flow ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ if (same_flow_addr(file_pos, flow_control)) {
+ DBG("recv ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ file_pos->flow_ctrl_creds++;
+ DBG("flow control credentials=%d.\n",
+ file_pos->flow_ctrl_creds);
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_disconn_addr - tell they have same address
+ *
+ * @file: private data of the file object.
+ * @disconn: disconnection request.
+ *
+ * returns !=0, same; 0,not.
+ */
+static int same_disconn_addr(struct heci_file_private *file,
+ struct hbm_client_disconnect_request *disconn)
+{
+ return ((file->host_client_id == disconn->host_addr)
+ && (file->me_client_id == disconn->me_addr));
+}
+
+/**
+ * heci_client_disconnect_request - disconnect request bh routine
+ *
+ * @dev: Device object for our driver.
+ * @disconnect_req: disconnect request bus message.
+ */
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_response *disconnect_res;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (same_disconn_addr(file_pos, disconnect_req)) {
+ DBG("disconnect request host client %d ME client %d.\n",
+ disconnect_req->host_addr,
+ disconnect_req->me_addr);
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->timer_count = 0;
+ if (file_pos == &dev->wd_file_ext) {
+ dev->wd_due_counter = 0;
+ dev->wd_pending = 0;
+ } else if (file_pos == &dev->iamthif_file_ext)
+ dev->iamthif_timer = 0;
+
+ /* prepare disconnect response */
+ heci_hdr =
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length =
+ sizeof(struct hbm_client_connect_response);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ disconnect_res =
+ (struct hbm_client_connect_response *)
+ &dev->ext_msg_buf[1];
+ disconnect_res->host_addr = file_pos->host_client_id;
+ disconnect_res->me_addr = file_pos->me_client_id;
+ *(__u8 *) (&disconnect_res->cmd) =
+ CLIENT_DISCONNECT_RES_CMD;
+ disconnect_res->status = 0;
+ dev->extra_write_index = 2;
+ break;
+ }
+ }
+}
+
+/**
+ * heci_timer - timer function.
+ *
+ * @data: pointer to the device structure
+ *
+ * NOTE: This function is called by timer interrupt work
+ */
+void heci_wd_timer(unsigned long data)
+{
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ DBG("send watchdog.\n");
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ /* Watchdog */
+ if ((dev->wd_due_counter != 0) && (dev->wd_bypass == 0)) {
+ if (--dev->wd_due_counter == 0) {
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_wd(dev)) {
+ DBG("wd send failed.\n");
+ } else {
+ flow_ctrl_reduce(dev,
+ &dev->wd_file_ext);
+ }
+
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 2;
+ else
+ dev->wd_due_counter = 0;
+
+ } else
+ dev->wd_pending = 1;
+
+ }
+ }
+ if (dev->iamthif_stall_timer != 0) {
+ if (--dev->iamthif_stall_timer == 0) {
+ DBG("reseting because of hang to PTHI.\n");
+ heci_reset(dev, 1);
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->iamthif_current_cb)
+ heci_free_cb_private(dev->iamthif_current_cb);
+
+ spin_lock_bh(&dev->device_lock);
+ dev->iamthif_file_object = NULL;
+ dev->iamthif_current_cb = NULL;
+ run_next_iamthif_cmd(dev);
+ }
+ }
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+}
diff --git a/drivers/char/heci/io_heci.c b/drivers/char/heci/io_heci.c
new file mode 100644
index 0000000..3fc1bb5
--- /dev/null
+++ b/drivers/char/heci/io_heci.c
@@ -0,0 +1,847 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/list.h>
+#include <linux/unistd.h>
+#include <linux/delay.h>
+
+#include "heci_data_structures.h"
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+/**
+ * heci_ioctl_get_version - the get driver version IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @*u_msg: pointer to user data struct in user space
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ struct heci_driver_version *version;
+ struct heci_message_data res_msg;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev)
+ || (!file_ext))
+ return -ENODEV;
+
+ if (k_msg.size < (sizeof(struct heci_driver_version) - 2)) {
+ DBG("user buffer less than heci_driver_version.\n");
+ return -EMSGSIZE;
+ }
+
+ res_msg.data = kmalloc(sizeof(struct heci_driver_version), GFP_KERNEL);
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_driver_version));
+ return -ENOMEM;
+ }
+
+ version = (struct heci_driver_version *) res_msg.data;
+ version->major = MAJOR_VERSION;
+ version->minor = MINOR_VERSION;
+ version->hotfix = QUICK_FIX_NUMBER;
+ version->build = VER_BUILD;
+ res_msg.size = sizeof(struct heci_driver_version);
+ if (k_msg.size < sizeof(struct heci_driver_version))
+ res_msg.size -= 2;
+
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+end:
+ kfree(res_msg.data);
+ return rets;
+}
+
+/**
+ * heci_ioctl_connect_client - the connect to fw client IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @*u_msg: pointer to user data struct in user space
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file)
+{
+ int rets = 0;
+ struct heci_message_data req_msg, res_msg;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_client *client;
+ struct heci_file_private *file_ext;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ long timeout = 15; /*15 second */
+ __u8 i;
+ int err = 0;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file))
+ return -ENODEV;
+
+ file_ext = file->private_data;
+ if (!file_ext)
+ return -ENODEV;
+
+ if (k_msg.size != sizeof(struct guid)) {
+ DBG("user buffer size is not equal to size of struct "
+ "guid(16).\n");
+ return -EMSGSIZE;
+ }
+
+ if (!k_msg.data)
+ return -EIO;
+
+ req_msg.data = kmalloc(sizeof(struct guid), GFP_KERNEL);
+ res_msg.data = kmalloc(sizeof(struct heci_client), GFP_KERNEL);
+
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_client));
+ kfree(req_msg.data);
+ return -ENOMEM;
+ }
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ (int) sizeof(struct guid));
+ kfree(res_msg.data);
+ return -ENOMEM;
+ }
+ req_msg.size = sizeof(struct guid);
+ res_msg.size = sizeof(struct heci_client);
+
+ /* copy the message to kernel space -
+ * use a pointer already copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, k_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ /* buffered ioctl cb */
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb) {
+ rets = -ENOMEM;
+ goto end;
+ }
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->response_buffer.data = res_msg.data;
+ priv_cb->response_buffer.size = res_msg.size;
+ priv_cb->request_buffer.data = req_msg.data;
+ priv_cb->request_buffer.size = req_msg.size;
+ priv_cb->major_file_operations = HECI_IOCTL;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if ((file_ext->state != HECI_FILE_INITIALIZING) &&
+ (file_ext->state != HECI_FILE_DISCONNECTED)) {
+ rets = -EBUSY;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ /* find ME client we're trying to connect to */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp((struct guid *)req_msg.data,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (dev->me_clients[i].props.fixed_address == 0) {
+ file_ext->me_client_id =
+ dev->me_clients[i].client_id;
+ file_ext->state = HECI_FILE_CONNECTING;
+ }
+ break;
+ }
+ }
+ /* if we're connecting to PTHI client so we will use the exist
+ * connection
+ */
+ if (memcmp((struct guid *)req_msg.data, &heci_pthi_guid,
+ sizeof(struct guid)) == 0) {
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ if (heci_fe_same_id(file_ext, file_pos)) {
+ DBG("remove file private data node host"
+ " client = %d, ME client = %d.\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del(&file_pos->link);
+ }
+
+ }
+ DBG("free file private data memory.\n");
+ kfree(file_ext);
+ file_ext = NULL;
+ file->private_data = &dev->iamthif_file_ext;
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length =
+ dev->me_clients[i].props.max_msg_length;
+ client->protocol_version =
+ dev->me_clients[i].props.protocol_version;
+ rets = dev->iamthif_file_ext.status;
+ spin_unlock_bh(&dev->device_lock);
+
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ }
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state != HECI_FILE_CONNECTING) {
+ rets = -ENODEV;
+ spin_unlock(&file_ext->file_lock);
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ spin_unlock(&file_ext->file_lock);
+ /* prepare the output buffer */
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length = dev->me_clients[i].props.max_msg_length;
+ client->protocol_version = dev->me_clients[i].props.protocol_version;
+ if (dev->host_buffer_is_empty
+ && !other_client_is_connecting(dev, file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_connect(dev, file_ext)) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ } else {
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ priv_cb->file_private = file_ext;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.
+ cb_list);
+ }
+
+
+ } else {
+ priv_cb->file_private = file_ext;
+ DBG("add connect cb to control write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+
+ if (HECI_FILE_CONNECTED == file_ext->state) {
+ DBG("successfully connected to FW client.\n");
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ } else {
+ DBG("failed to connect to FW client.file_ext->state = %d.\n",
+ file_ext->state);
+ if (!err) {
+ DBG("wait_event_interruptible_timeout failed on client"
+ " connect message fw response message.\n");
+ }
+ rets = -EFAULT;
+ goto remove_list;
+ }
+
+remove_list:
+ if (priv_cb) {
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_list(&dev->ctrl_rd_list, file_ext);
+ heci_flush_list(&dev->ctrl_wr_list, file_ext);
+ spin_unlock_bh(&dev->device_lock);
+ }
+end:
+ DBG("free connect cb memory.");
+ kfree(req_msg.data);
+ kfree(res_msg.data);
+ kfree(priv_cb);
+ return rets;
+}
+
+/**
+ * heci_ioctl_wd - the wd IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ struct heci_message_data req_msg; /*in kernel on the stack */
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size != HECI_WATCHDOG_DATA_SIZE) {
+ DBG("user buffer has invalid size.\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+
+ req_msg.data = kmalloc(HECI_WATCHDOG_DATA_SIZE, GFP_KERNEL);
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ HECI_WATCHDOG_DATA_SIZE);
+ return -ENOMEM;
+ }
+ req_msg.size = HECI_WATCHDOG_DATA_SIZE;
+
+ /* copy the message to kernel space - use a pointer already
+ * copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, req_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if (!dev->asf_mode) {
+ rets = -EIO;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ memcpy(&dev->wd_data[HECI_WD_PARAMS_SIZE], req_msg.data,
+ HECI_WATCHDOG_DATA_SIZE);
+
+ dev->wd_timeout = (req_msg.data[1] << 8) + req_msg.data[0];
+ dev->wd_pending = 0;
+ dev->wd_due_counter = 1; /* next timer */
+ if (dev->wd_timeout == 0) {
+ memcpy(dev->wd_data, &stop_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ } else {
+ memcpy(dev->wd_data, &start_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ mod_timer(&dev->wd_timer, jiffies);
+ }
+ spin_unlock_bh(&dev->device_lock);
+end:
+ kfree(req_msg.data);
+ return rets;
+}
+
+
+/**
+ * heci_ioctl_bypass_wd - the bypass_wd IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_ioctl_bypass_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ __u8 flag = 0;
+ int rets = 0;
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size < 1) {
+ DBG("user buffer less than HECI_WATCHDOG_DATA_SIZE.\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+ if (copy_from_user(&flag, k_msg.data, 1)) {
+ rets = -EFAULT;
+ goto end;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ flag = flag ? (1) : (0);
+ dev->wd_bypass = flag;
+ spin_unlock_bh(&dev->device_lock);
+end:
+ return rets;
+}
+
+/**
+ * find_pthi_read_list_entry - finds a PTHIlist entry for current file
+ *
+ * @dev: Device object for our driver
+ * @file: pointer to file object
+ *
+ * returns returned a list entry on success, NULL on failure.
+ */
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct file *file)
+{
+ struct heci_file_private *file_ext_temp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if ((dev->pthi_read_complete_list.status == 0) &&
+ !list_empty(&dev->pthi_read_complete_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_read_complete_list.heci_cb.cb_list, cb_list) {
+ file_ext_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if ((file_ext_temp != NULL) &&
+ (file_ext_temp == &dev->iamthif_file_ext) &&
+ (priv_cb_pos->file_object == file))
+ return priv_cb_pos;
+ }
+ }
+ return NULL;
+}
+
+/**
+ * pthi_read - read data from pthi client
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @file: pointer to file object
+ * @*ubuf: pointer to user data in user space
+ * @length: data length to read
+ * @offset: data read offset
+ *
+ * returns
+ * returned data length on success,
+ * zero if no data to read,
+ * negative on failure.
+ */
+int pthi_read(struct iamt_heci_device *dev, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset)
+{
+ int rets = 0;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_file_private *file_ext = file->private_data;
+ __u8 i;
+ unsigned long currtime = get_seconds();
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ if ((file_ext == NULL) || (file_ext != &dev->iamthif_file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->iamthif_file_ext.me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients)
+ || (dev->me_clients[i].client_id !=
+ dev->iamthif_file_ext.me_client_id)) {
+ DBG("PTHI client not found.\n");
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ priv_cb = find_pthi_read_list_entry(dev, file);
+ if (!priv_cb) {
+ spin_unlock_bh(&dev->device_lock);
+ return 0; /* No more data to read */
+ } else {
+ if (priv_cb &&
+ (currtime - priv_cb->read_time > IAMTHIF_READ_TIMER)) {
+ /* 15 sec for the message has expired */
+ list_del(&priv_cb->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ETIMEDOUT;
+ goto free;
+ }
+ /* if the whole message will fit remove it from the list */
+ if ((priv_cb->information >= *offset) &&
+ (length >= (priv_cb->information - *offset)))
+ list_del(&priv_cb->cb_list);
+ else if ((priv_cb->information > 0) &&
+ (priv_cb->information <= *offset)) {
+ /* end of the message has been reached */
+ list_del(&priv_cb->cb_list);
+ rets = 0;
+ spin_unlock_bh(&dev->device_lock);
+ goto free;
+ }
+ /* else means that not full buffer will be read and do not
+ * remove message from deletion list
+ */
+ }
+ DBG("pthi priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("pthi priv_cb->information - %lu\n",
+ priv_cb->information);
+ spin_unlock_bh(&dev->device_lock);
+
+ /* length is being turncated to PAGE_SIZE, however,
+ * the information may be longer */
+ length = length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset);
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length))
+ rets = -EFAULT;
+ else {
+ rets = length;
+ if ((*offset + length) < priv_cb->information) {
+ *offset += length;
+ goto out;
+ }
+ }
+free:
+ DBG("free pthi cb memory.\n");
+ *offset = 0;
+ heci_free_cb_private(priv_cb);
+out:
+ return rets;
+}
+
+/**
+ * heci_start_read - the start read client message function.
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @file_ext: private data of the file object
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int heci_start_read(struct iamt_heci_device *dev, int if_num,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ __u8 i;
+ struct heci_cb_private *priv_cb = NULL;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext)) {
+ DBG("received wrong function input param.\n");
+ return -ENODEV;
+ }
+ if (file_ext->state != HECI_FILE_CONNECTED)
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ DBG("check if read is pending.\n");
+ if ((file_ext->read_pending) || (file_ext->read_cb != NULL)) {
+ DBG("read is pending.\n");
+ return -EBUSY;
+ }
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ DBG("allocation call back success\n"
+ "host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id)
+ break;
+
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if (i == dev->num_heci_me_clients) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+
+ priv_cb->response_buffer.size = dev->me_clients[i].props.max_msg_length;
+ spin_unlock_bh(&dev->device_lock);
+ priv_cb->response_buffer.data =
+ kmalloc(priv_cb->response_buffer.size, GFP_KERNEL);
+ if (!priv_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ DBG("allocation call back data success.\n");
+ priv_cb->major_file_operations = HECI_READ;
+ /* make sure information is zero before we start */
+ priv_cb->information = 0;
+ priv_cb->file_private = (void *) file_ext;
+ file_ext->read_cb = priv_cb;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ rets = -ENODEV;
+ goto unlock;
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+unlock:
+ spin_unlock_bh(&dev->device_lock);
+fail:
+ heci_free_cb_private(priv_cb);
+ return rets;
+}
+
+/**
+ * pthi_write - write iamthif data to pthi client
+ *
+ * @dev: Device object for our driver
+ * @priv_cb: heci call back struct
+ *
+ * returns 0 on success, <0 on failure.
+ */
+int pthi_write(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb)
+{
+ int rets = 0;
+ struct heci_msg_hdr heci_hdr;
+
+ if ((!dev) || (!priv_cb))
+ return -ENODEV;
+
+ DBG("write data to pthi client.\n");
+
+ dev->iamthif_state = HECI_IAMTHIF_WRITING;
+ dev->iamthif_current_cb = priv_cb;
+ dev->iamthif_file_object = priv_cb->file_object;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_msg_buf_size = priv_cb->request_buffer.size;
+ memcpy(dev->iamthif_msg_buf, priv_cb->request_buffer.data,
+ priv_cb->request_buffer.size);
+
+ if (flow_ctrl_creds(dev, &dev->iamthif_file_ext) &&
+ dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (priv_cb->request_buffer.size >
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr)) {
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = priv_cb->request_buffer.size;
+ heci_hdr.msg_complete = 1;
+ }
+
+ heci_hdr.host_addr = dev->iamthif_file_ext.host_client_id;
+ heci_hdr.me_addr = dev->iamthif_file_ext.me_client_id;
+ heci_hdr.reserved = 0;
+ dev->iamthif_msg_buf_index += heci_hdr.length;
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *)(dev->iamthif_msg_buf),
+ heci_hdr.length))
+ return -ENODEV;
+
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, &dev->iamthif_file_ext);
+ dev->iamthif_flow_control_pending = 1;
+ dev->iamthif_state = HECI_IAMTHIF_FLOW_CONTROL;
+ DBG("add pthi cb to write waiting list\n");
+ dev->iamthif_current_cb = priv_cb;
+ dev->iamthif_file_object = priv_cb->file_object;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ DBG("message does not complete, "
+ "so add pthi cb to write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ } else {
+ if (!(dev->host_buffer_is_empty))
+ DBG("host buffer is not empty");
+
+ DBG("No flow control credentials, "
+ "so add iamthif cb to write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return rets;
+}
+
+/**
+ * iamthif_ioctl_send_msg - send cmd data to pthi client
+ *
+ * @dev: Device object for our driver
+ *
+ * returns 0 on success, <0 on failure.
+ */
+void run_next_iamthif_cmd(struct iamt_heci_device *dev)
+{
+ struct heci_file_private *file_ext_tmp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int status = 0;
+
+ if (!dev)
+ return;
+
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+ dev->iamthif_file_object = NULL;
+
+ if (dev->pthi_cmd_list.status == 0 &&
+ !list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)) {
+ DBG("complete pthi cmd_list cb.\n");
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_cmd_list.heci_cb.cb_list, cb_list) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext_tmp != NULL) &&
+ (file_ext_tmp == &dev->iamthif_file_ext)) {
+ status = pthi_write(dev, priv_cb_pos);
+ if (status != 0) {
+ DBG("pthi write failed status = %d\n",
+ status);
+ return;
+ }
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * heci_free_cb_private - free heci_cb_private related memory
+ *
+ * @priv_cb: heci callback struct
+ */
+void heci_free_cb_private(struct heci_cb_private *priv_cb)
+{
+ if (priv_cb == NULL)
+ return;
+
+ kfree(priv_cb->request_buffer.data);
+ kfree(priv_cb->response_buffer.data);
+ kfree(priv_cb);
+}
+
^ permalink raw reply related [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-07-17 18:27 Marcin Obara
@ 2008-07-18 0:00 ` Randy Dunlap
2008-07-18 5:44 ` Marcin Obara
` (2 subsequent siblings)
3 siblings, 0 replies; 42+ messages in thread
From: Randy Dunlap @ 2008-07-18 0:00 UTC (permalink / raw)
To: Marcin Obara; +Cc: linux-kernel
On Thu, 17 Jul 2008 20:27:10 +0200 (CEST) Marcin Obara wrote:
Please include diffstat for the entire patch. See Documentation/SubmittingPatches .
> diff --git a/drivers/char/heci/Kconfig b/drivers/char/heci/Kconfig
> new file mode 100644
> index 0000000..a4d8bf4
> --- /dev/null
> +++ b/drivers/char/heci/Kconfig
> @@ -0,0 +1,12 @@
> +#
> +# HECI device configuration
> +#
> +
> +config INTEL_MEI
> + tristate "Intel Management Engine Interface (MEI) Support"
The text prompt string usually also includes "(EXPERIMENTAL)", although
I wish that the *config tools did that for us...
> + depends on EXPERIMENTAL
> + ---help---
> + The Intel Management Engine Interface (Intel MEI) driver allows
> + applications to access the Active Management Technology
> + firmware and other Management Engine sub-systems.
> +
> diff --git a/drivers/char/heci/heci.h b/drivers/char/heci/heci.h
> new file mode 100644
> index 0000000..daafbc8
> --- /dev/null
> +++ b/drivers/char/heci/heci.h
> @@ -0,0 +1,176 @@
> +
> +#ifndef _HECI_H_
> +#define _HECI_H_
> +
> +#include <linux/version.h>
> +#include <linux/spinlock.h>
> +#include <linux/list.h>
> +#include <linux/pci.h>
> +#include <linux/timer.h>
> +#include <linux/interrupt.h>
> +#include <linux/workqueue.h>
> +#include <linux/module.h>
> +#include <linux/aio.h>
> +#include <linux/types.h>
> +#include "heci_data_structures.h"
> +
> +extern const struct guid heci_pthi_guid;
> +extern const struct guid heci_wd_guid;
> +extern const __u8 start_wd_params[];
> +extern const __u8 stop_wd_params[];
> +extern const __u8 heci_wd_state_independence_msg[3][4];
> +
> +/**
Oops. We use /** to flag the beginning of kernel-doc comments, but this (and others
here) is not a kernel-doc comment. Please just use /* here and other places that are
not kernel-doc comments. Or feel free to convert to kernel-doc. :)
> + * heci device ID
> + */
> +#define HECI_DEV_ID_82946GZ 0x2974 /* 82946GZ/GL */
> +#define HECI_DEV_ID_82G35 0x2984 /* 82G35 Express */
> +#define HECI_DEV_ID_82Q965 0x2994 /* 82Q963/Q965 */
> +#define HECI_DEV_ID_82G965 0x29A4 /* 82P965/G965 */
> +
> +#define HECI_DEV_ID_82GM965 0x2A04 /* Mobile PM965/GM965 */
> +#define HECI_DEV_ID_82GME965 0x2A14 /* Mobile GME965/GLE960 */
> +
> +#define HECI_DEV_ID_ICH9_82Q35 0x29B4 /* 82Q35 Express */
> +#define HECI_DEV_ID_ICH9_82G33 0x29C4 /* 82G33/G31/P35/P31 Express */
> +#define HECI_DEV_ID_ICH9_82Q33 0x29D4 /* 82Q33 Express */
> +#define HECI_DEV_ID_ICH9_82X38 0x29E4 /* 82X38/X48 Express */
> +#define HECI_DEV_ID_ICH9_3200 0x29F4 /* 3200/3210 Server */
> +
> +#define HECI_DEV_ID_ICH9_6 0x28B4 /* Bearlake */
> +#define HECI_DEV_ID_ICH9_7 0x28C4 /* Bearlake */
> +#define HECI_DEV_ID_ICH9_8 0x28D4 /* Bearlake */
> +#define HECI_DEV_ID_ICH9_9 0x28E4 /* Bearlake */
> +#define HECI_DEV_ID_ICH9_10 0x28F4 /* Bearlake */
> +
> +#define HECI_DEV_ID_ICH9M_1 0x2A44 /* Cantiga */
> +#define HECI_DEV_ID_ICH9M_2 0x2A54 /* Cantiga */
> +#define HECI_DEV_ID_ICH9M_3 0x2A64 /* Cantiga */
> +#define HECI_DEV_ID_ICH9M_4 0x2A74 /* Cantiga */
> +
> +#define HECI_DEV_ID_ICH10_1 0x2E04 /* Eaglelake */
> +#define HECI_DEV_ID_ICH10_2 0x2E14 /* Eaglelake */
> +#define HECI_DEV_ID_ICH10_3 0x2E24 /* Eaglelake */
> +#define HECI_DEV_ID_ICH10_4 0x2E34 /* Eaglelake */
> +
> +/**
> + * heci init function prototypes
> + */
> +struct iamt_heci_device *init_heci_device(struct pci_dev *pdev);
> +void heci_reset(struct iamt_heci_device *dev, int interrupts);
> +int heci_hw_init(struct iamt_heci_device *dev);
> +int heci_task_initialize_clients(void *data);
> +int heci_initialize_clients(struct iamt_heci_device *dev);
> +struct heci_file_private *heci_alloc_file_private(struct file *file);
> +int heci_disconnect_host_client(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext);
> +void heci_initialize_list(struct io_heci_list *list,
> + struct iamt_heci_device *dev);
> +void heci_flush_list(struct io_heci_list *list,
> + struct heci_file_private *file_ext);
> +void heci_flush_queues(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext);
> +
> +void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
> + __u8 host_client_id);
> +
> +/**
> + * interrupt function prototype
> + */
> +irqreturn_t heci_isr_interrupt(int irq, void *dev_id);
> +
> +void heci_wd_timer(unsigned long data);
> +
> +/**
> + * input output function prototype
> + */
> +int heci_ioctl_get_version(struct iamt_heci_device *device, int if_num,
> + struct heci_message_data *u_msg,
> + struct heci_message_data k_msg,
> + struct heci_file_private *file_ext);
> +
> +int heci_ioctl_connect_client(struct iamt_heci_device *device, int if_num,
> + struct heci_message_data *u_msg,
> + struct heci_message_data k_msg,
> + struct file *file);
> +
> +int heci_ioctl_wd(struct iamt_heci_device *device, int if_num,
> + struct heci_message_data k_msg,
> + struct heci_file_private *file_ext);
> +
> +int heci_ioctl_bypass_wd(struct iamt_heci_device *device, int if_num,
> + struct heci_message_data k_msg,
> + struct heci_file_private *file_ext);
> +
> +int heci_start_read(struct iamt_heci_device *device, int if_num,
> + struct heci_file_private *file_ext);
> +
> +int pthi_write(struct iamt_heci_device *device,
> + struct heci_cb_private *priv_cb);
> +
> +int pthi_read(struct iamt_heci_device *device, int if_num, struct file *file,
> + char *ubuf, size_t length, loff_t *offset);
> +
> +struct heci_cb_private *find_pthi_read_list_entry(
> + struct iamt_heci_device *device,
> + struct file *file);
> +
> +void run_next_iamthif_cmd(struct iamt_heci_device *device);
> +
> +void heci_free_cb_private(struct heci_cb_private *priv_cb);
> +
> +/**
> + * heci_fe_same_id - tell if file private data have same id
> + *
> + * @fe1: private data of 1. file object
> + * @fe2: private data of 2. file object
> + *
> + * @return !=0 - if ids are the same, 0 - if differ.
> + */
> +static inline int heci_fe_same_id(struct heci_file_private *fe1,
> + struct heci_file_private *fe2)
> +{
> + return ((fe1->host_client_id == fe2->host_client_id)
> + && (fe1->me_client_id == fe2->me_client_id));
> +}
> +
> +#endif /* _HECI_H_ */
> diff --git a/drivers/char/heci/heci_data_structures.h b/drivers/char/heci/heci_data_structures.h
> new file mode 100644
> index 0000000..f75af25
> --- /dev/null
> +++ b/drivers/char/heci/heci_data_structures.h
> @@ -0,0 +1,524 @@
> +
> +#ifndef _HECI_DATA_STRUCTURES_H_
> +#define _HECI_DATA_STRUCTURES_H_
> +
> +#include <linux/version.h>
> +#include <linux/spinlock.h>
> +#include <linux/list.h>
> +#include <linux/pci.h>
> +#include <linux/timer.h>
> +#include <linux/interrupt.h>
> +#include <linux/workqueue.h>
> +#include <linux/module.h>
> +#include <linux/aio.h>
> +#include <linux/types.h>
> +
> +/**
Same kernel-doc comments.
> + * error code definition
> + */
> +#define ESLOTS_OVERFLOW 1
> +#define ECORRUPTED_MESSAGE_HEADER 1000
> +#define ECOMPLETE_MESSAGE 1001
> +
> +#define HECI_FC_MESSAGE_RESERVED_LENGTH 5
> +
> +/**
> + * Number of queue lists used by this driver
> + */
> +#define HECI_IO_LISTS_NUMBER 7
> +
> +/**
> + * Maximum transmission unit (MTU) of heci messages
> + */
> +#define IAMTHIF_MTU 4160
> +
> +
> +/**
> + * HECI HW Section
> + */
> +
> +/* HECI registers */
> +/* H_CB_WW - Host Circular Buffer (CB) Write Window register */
> +#define H_CB_WW 0
> +/* H_CSR - Host Control Status register */
> +#define H_CSR 4
> +/* ME_CB_RW - ME Circular Buffer Read Window register (read only) */
> +#define ME_CB_RW 8
> +/* ME_CSR_HA - ME Control Status Host Access register (read only) */
> +#define ME_CSR_HA 0xC
> +
> +
> +/* register bits of H_CSR (Host Control Status register) */
> +/* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */
> +#define H_CBD 0xFF000000
> +/* Host Circular Buffer Write Pointer */
> +#define H_CBWP 0x00FF0000
> +/* Host Circular Buffer Read Pointer */
> +#define H_CBRP 0x0000FF00
> +/* Host Reset */
> +#define H_RST 0x00000010
> +/* Host Ready */
> +#define H_RDY 0x00000008
> +/* Host Interrupt Generate */
> +#define H_IG 0x00000004
> +/* Host Interrupt Status */
> +#define H_IS 0x00000002
> +/* Host Interrupt Enable */
> +#define H_IE 0x00000001
> +
> +
> +/* register bits of ME_CSR_HA (ME Control Status Host Access register) */
> +/* ME CB (Circular Buffer) Depth HRA (Host Read Access)
> + * - host read only access to ME_CBD */
> +#define ME_CBD_HRA 0xFF000000
> +/* ME CB Write Pointer HRA - host read only access to ME_CBWP */
> +#define ME_CBWP_HRA 0x00FF0000
> +/* ME CB Read Pointer HRA - host read only access to ME_CBRP */
> +#define ME_CBRP_HRA 0x0000FF00
> +/* ME Reset HRA - host read only access to ME_RST */
> +#define ME_RST_HRA 0x00000010
> +/* ME Ready HRA - host read only access to ME_RDY */
> +#define ME_RDY_HRA 0x00000008
> +/* ME Interrupt Generate HRA - host read only access to ME_IG */
> +#define ME_IG_HRA 0x00000004
> +/* ME Interrupt Status HRA - host read only access to ME_IS */
> +#define ME_IS_HRA 0x00000002
> +/* ME Interrupt Enable HRA - host read only access to ME_IE */
> +#define ME_IE_HRA 0x00000001
> +
> +#define HECI_MINORS_BASE 1
> +#define HECI_MINORS_COUNT 1
> +
> +#define HECI_MINOR_NUMBER 1
> +#define HECI_MAX_OPEN_HANDLE_COUNT 253
> +
> +/**
> + * debug kernel print macro define
> + */
> +extern int heci_debug;
> +
> +#define DBG(format, arg...) do { \
> + if (heci_debug) \
> + printk(KERN_ERR "%s: " format , __func__ , ## arg); \
> +} while (0)
Why KERN_ERR ?
> +
> +
> +/**
> + * time to wait HECI become ready after init
> + */
> +#define HECI_INTEROP_TIMEOUT (HZ * 7)
> +
> +/**
> + * watch dog definition
> + */
> +#define HECI_WATCHDOG_DATA_SIZE 16
> +#define HECI_START_WD_DATA_SIZE 20
> +#define HECI_WD_PARAMS_SIZE 4
> +#define HECI_WD_STATE_INDEPENDENCE_MSG_SENT (1 << 0)
> +
...
> +
> +/**
> + * read_heci_register - Read a byte from the heci device
> + *
> + * @device: the device structure
> + * @offset: offset from which to read the data
> + *
> + * @return the byte read.
Drop the @, just Return...
> + */
> +__u32 read_heci_register(struct iamt_heci_device *device,
> + unsigned long offset);
> +
> +/**
> + * write_heci_register - Write 4 bytes to the heci device
> + *
> + * @device: the device structure
> + * @offset: offset from which to write the data
> + * @value: the byte to write
> + */
> +void write_heci_register(struct iamt_heci_device *device, unsigned long offset,
> + __u32 value);
> +
> +#endif /* _HECI_DATA_STRUCTURES_H_ */
> diff --git a/drivers/char/heci/heci_init.c b/drivers/char/heci/heci_init.c
> new file mode 100644
> index 0000000..8eb42a0
> --- /dev/null
> +++ b/drivers/char/heci/heci_init.c
> @@ -0,0 +1,1085 @@
> +
> +const __u8 watch_dog_data[] = {
> + 1, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
> +};
> +const __u8 start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 };
> +const __u8 stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10 };
> +
> +const __u8 heci_wd_state_independence_msg[3][4] = {
> + {0x05, 0x02, 0x51, 0x10},
> + {0x05, 0x02, 0x52, 0x10},
> + {0x07, 0x02, 0x01, 0x10}
> +};
> +
> +const struct guid heci_asf_guid = {
> + 0x75B30CD6, 0xA29E, 0x4AF7,
> + {0xA7, 0x12, 0xE6, 0x17, 0x43, 0x93, 0xC8, 0xA6}
> +};
> +const struct guid heci_wd_guid = {
> + 0x05B79A6F, 0x4628, 0x4D7F,
> + {0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB}
> +};
> +const struct guid heci_pthi_guid = {
> + 0x12f80028, 0xb4b7, 0x4b2d,
> + {0xac, 0xa8, 0x46, 0xe0, 0xff, 0x65, 0x81, 0x4c}
> +};
> +
> +
> +/**
Bzzt.
> + * heci init function prototypes
> + */
> +static void heci_check_asf_mode(struct iamt_heci_device *dev);
> +static int host_start_message(struct iamt_heci_device *dev);
> +static int host_enum_clients_message(struct iamt_heci_device *dev);
> +static int allocate_me_clients_storage(struct iamt_heci_device *dev);
> +static void host_init_wd(struct iamt_heci_device *dev);
> +static void host_init_iamthif(struct iamt_heci_device *dev);
> +static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
> + long timeout);
> +
> +
> +/**
> + * heci_initialize_list - Sets up a queue list.
> + *
> + * @list: An instance of our list structure
> + * @dev: Device object for our driver
> + */
> +void heci_initialize_list(struct io_heci_list *list,
> + struct iamt_heci_device *dev)
> +{
> + /* initialize our queue list */
> + INIT_LIST_HEAD(&list->heci_cb.cb_list);
> + list->status = 0;
> + list->device_extension = dev;
> +}
> +
> +/**
> + * heci_flush_queues - flush our queues list belong to file_ext.
> + *
> + * @dev: Device object for our driver
> + * @file_ext: private data of the file object
> + *
> + */
> +void heci_flush_queues(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> + int i;
> +
> + if (!dev || !file_ext)
> + return;
> +
> + /* flush our queue list belong to file_ext */
> + for (i = 0; i < HECI_IO_LISTS_NUMBER; i++) {
> + DBG("remove list entry belong to file_ext\n");
> + heci_flush_list(dev->io_list_array[i], file_ext);
> + }
> +}
> +
> +
> +/**
> + * heci_flush_list - remove list entry belong to file_ext.
> + *
> + * @list: An instance of our list structure
> + * @file_ext: private data of the file object
> + */
> +void heci_flush_list(struct io_heci_list *list,
> + struct heci_file_private *file_ext)
> +{
> + struct heci_file_private *file_ext_tmp;
> + struct heci_cb_private *priv_cb_pos = NULL;
> + struct heci_cb_private *priv_cb_next = NULL;
> +
> + if (!list || !file_ext)
> + return;
> +
> + if (list->status != 0)
> + return;
> +
> + if (list_empty(&list->heci_cb.cb_list))
> + return;
> +
> + list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
> + &list->heci_cb.cb_list, cb_list) {
> + if (priv_cb_pos) {
> + file_ext_tmp = (struct heci_file_private *)
> + priv_cb_pos->file_private;
> + if (file_ext_tmp) {
> + if (heci_fe_same_id(file_ext, file_ext_tmp))
> + list_del(&priv_cb_pos->cb_list);
> + }
> + }
> + }
> +}
> +
> +/**
> + * heci_reset_iamthif_params - initializes heci device iamthif
> + * @dev: The heci device structure
> + */
> +static void heci_reset_iamthif_params(struct iamt_heci_device *dev)
> +{
> + /* reset iamthif parameters. */
> + dev->iamthif_current_cb = NULL;
> + dev->iamthif_msg_buf_size = 0;
> + dev->iamthif_msg_buf_index = 0;
> + dev->iamthif_canceled = 0;
> + dev->iamthif_file_ext.file = NULL;
> + dev->iamthif_ioctl = 0;
> + dev->iamthif_state = HECI_IAMTHIF_IDLE;
> + dev->iamthif_timer = 0;
> +}
> +
> +/**
> + * init_heci_device - allocates and initializes the heci device structure
> + * @pdev: The pci device structure
> + *
> + * @return The heci_device_device pointer on success, NULL on failure.
Drop @, just Return or Returns ....
> + */
> +struct iamt_heci_device *init_heci_device(struct pci_dev *pdev)
> +{
> +}
> +
> +
> +
> +
> +static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
> + long timeout)
> +{
> + return wait_event_interruptible_timeout(dev->wait_recvd_msg,
> + (dev->recvd_msg), timeout);
> +}
> +
> +/**
> + * heci_hw_init - init host and fw to start work.
> + *
> + * @dev: Device object for our driver
> + *
> + * @return 0 on success, <0 on failure.
Not @return....
> + */
> +int heci_hw_init(struct iamt_heci_device *dev)
> +{
> +}
> +
> +/**
> + * heci_hw_reset - reset fw via heci csr register.
> + *
> + * @dev: Device object for our driver
> + * @interrupts: if interrupt should be enable after reset.
> + */
> +static void heci_hw_reset(struct iamt_heci_device *dev, int interrupts)
> +{
> + dev->host_hw_state |= (H_RST | H_IG);
> +
> + if (interrupts)
> + heci_csr_enable_interrupts(dev);
> + else
> + heci_csr_disable_interrupts(dev);
> +
> + BUG_ON((dev->host_hw_state & H_RST) != H_RST);
> + BUG_ON((dev->host_hw_state & H_RDY) != 0);
> +}
> +
> +/**
> + * heci_reset - reset host and fw.
> + *
> + * @dev: Device object for our driver
> + * @interrupts: if interrupt should be enable after reset.
> + */
> +void heci_reset(struct iamt_heci_device *dev, int interrupts)
> +{
> + dev->num_heci_me_clients = 0;
> + dev->rd_msg_hdr = 0;
> + dev->stop = 0;
> + dev->wd_pending = 0;
> +
> + /* update the state of the registers after reset */
> + dev->host_hw_state = read_heci_register(dev, H_CSR);
> + dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
> +
> + DBG("after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
> + dev->host_hw_state, dev->me_hw_state);
> +
> + if (unexpected)
> + printk(KERN_WARNING "unexpected heci reset.\n");
printk() strings usually benefit from some common prefix, such as
printk(KERN_WARNING "heci: unexpected reset\n");
> +
> + /* Wake up all readings so they can be interrupted */
> + list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
> + if (&file_pos->rx_wait &&
> + waitqueue_active(&file_pos->rx_wait)) {
> + printk(KERN_INFO "heci: Waking up client!\n");
> + wake_up_interruptible(&file_pos->rx_wait);
> + }
> + }
> + /* remove all waiting requests */
> + if (dev->write_list.status == 0 &&
> + !list_empty(&dev->write_list.heci_cb.cb_list)) {
> + list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
> + &dev->write_list.heci_cb.cb_list, cb_list) {
> + if (priv_cb_pos) {
> + list_del(&priv_cb_pos->cb_list);
> + heci_free_cb_private(priv_cb_pos);
> + }
> + }
> + }
> +}
> +
> +/**
> + * heci_initialize_clients - routine.
What routine??
> + *
> + * @dev: Device object for our driver
> + *
> + */
> +int heci_initialize_clients(struct iamt_heci_device *dev)
> +{
> +}
> +
> +/**
> + * heci_task_initialize_clients - routine.
What routine??
> + *
> + * @data: Device object for our driver
> + *
> + */
> +int heci_task_initialize_clients(void *data)
> +{
> +}
> +
> +/**
> + * host_start_message - heci host send start message.
> + *
> + * @dev: Device object for our driver
> + *
> + * @return 0 on success, <0 on failure.
Not @return.
> + */
> +static int host_start_message(struct iamt_heci_device *dev)
> +{
> +}
> +
> +/**
> + * host_enum_clients_message - host send enumeration client request message.
> + *
> + * @dev: Device object for our driver
> + * @return 0 on success, <0 on failure.
Not @return ....
> + */
> +static int host_enum_clients_message(struct iamt_heci_device *dev)
> +{
> +}
> +
> +/**
> + * host_client_properties - reads properties for client
> + *
> + * @dev: Device object for our driver
> + * @idx: client index in me client array
> + * @client_id: id of the client
> + *
> + * @return 0 on success, <0 on failure.
Ditto.
> + */
> +static int host_client_properties(struct iamt_heci_device *dev,
> + struct heci_me_client *client)
> +{
> +}
> +
> +/**
> + * allocate_me_clients_storage - allocate storage for me clients
> + *
> + * @dev: Device object for our driver
> + *
> + * @return 0 on success, <0 on failure.
Not @return.
> + */
> +static int allocate_me_clients_storage(struct iamt_heci_device *dev)
> +{
> +}
> +
> +/**
> + * heci_init_file_private - initializes private file structure.
> + *
> + * @priv: private file structure to be initialized
> + * @file: the file structure
> + *
> + */
> +static void heci_init_file_private(struct heci_file_private *priv,
> + struct file *file)
> +{
> +}
> +
> +/**
> + * heci_find_me_client - search for ME client guid
> + * sets client_id in heci_file_private if found
> + * @dev: Device object for our driver
> + * @priv: private file structure to set client_id in
> + * @cguid: searched guid of ME client
> + * @client_id: id of host client to be set in file private structure
> + *
> + * @return ME client index
Not @return ....
> + */
> +static __u8 heci_find_me_client(struct iamt_heci_device *dev,
> + struct heci_file_private *priv,
> + const struct guid *cguid, __u8 client_id)
> +{
> +}
> +
> +/**
> + * heci_check_asf_mode - check for ASF client
> + *
> + * @dev: Device object for our driver
> + *
> + */
> +static void heci_check_asf_mode(struct iamt_heci_device *dev)
> +{
> +}
> +
> +/**
> + * heci_connect_me_client - connect ME client
> + * @dev: Device object for our driver
> + * @priv: private file structure
> + * @timeout: connect timeout in seconds
> + *
> + * @return 1 - if connected, 0 - if not
Not @return ....
> + */
> +static __u8 heci_connect_me_client(struct iamt_heci_device *dev,
> + struct heci_file_private *priv,
> + long timeout)
> +{
> +}
> +
> +/**
> + * host_init_wd - heci initialization wd.
> + *
> + * @dev: Device object for our driver
> + *
> + */
> +static void host_init_wd(struct iamt_heci_device *dev)
> +{
> +}
> +
> +
> +/**
> + * host_init_iamthif - heci initialization iamthif client.
> + *
> + * @dev: Device object for our driver
> + *
> + */
> +static void host_init_iamthif(struct iamt_heci_device *dev)
> +{
> +}
> +
> +/**
> + * heci_alloc_file_private - allocates a private file structure and set it up.
> + * @file: the file structure
> + *
> + * @return The allocated file or NULL on failure
* Returns ....
> + */
> +struct heci_file_private *heci_alloc_file_private(struct file *file)
> +{
> +}
> +
> +
> +
> +/**
> + * heci_disconnect_host_client - send disconnect message to fw from host client.
> + *
> + * @dev: Device object for our driver
> + * @file_ext: private data of the file object
> + *
> + * @return 0 on success, <0 on failure.
Argh.
> + */
> +int heci_disconnect_host_client(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> +}
> +
> +/**
> + * heci_remove_client_from_file_list -
> + * remove file private data from device file list
> + *
> + * @dev: Device object for our driver
> + * @host_client_id: host client id to be removed
> + *
> + */
> +void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
> + __u8 host_client_id)
> +{
> +}
> diff --git a/drivers/char/heci/heci_interface.c b/drivers/char/heci/heci_interface.c
> new file mode 100644
> index 0000000..2527bb2
> --- /dev/null
> +++ b/drivers/char/heci/heci_interface.c
> @@ -0,0 +1,517 @@
> +
> +/**
> + * read_heci_register - Read a byte from the heci device
> + *
> + * @device: the device structure
> + * @offset: offset from which to read the data
> + *
> + * @return the byte read.
* Returns the byte read.
> + */
> +__u32 read_heci_register(struct iamt_heci_device *device,
> + unsigned long offset)
> +{
> + return readl(device->mem_addr + offset);
> +}
> +
> +/**
> + * write_heci_register - Write 4 bytes to the heci device
> + *
> + * @device: the device structure
> + * @offset: offset from which to write the data
> + * @value: the byte to write
> + */
> +void write_heci_register(struct iamt_heci_device *device, unsigned long offset,
> + __u32 value)
> +{
> + writel(value, device->mem_addr + offset);
> +}
> +
> +
> +/**
> + * heci_set_csr_register - write H_CSR register to the heci device
> + *
> + * @dev: device object for our driver
> + */
> +void heci_set_csr_register(struct iamt_heci_device *dev)
> +{
> + write_heci_register(dev, H_CSR, dev->host_hw_state);
> + dev->host_hw_state = read_heci_register(dev, H_CSR);
> +}
> +
> +/**
> + * heci_csr_enable_interrupts - enable heci device interrupts
> + *
> + * @dev: device object for our driver
> + */
> +void heci_csr_enable_interrupts(struct iamt_heci_device *dev)
> +{
> + dev->host_hw_state |= H_IE;
> + heci_set_csr_register(dev);
> +}
> +
> +/**
> + * heci_csr_disable_interrupts - disable heci device interrupts
> + *
> + * @dev: device object for our driver
> + */
> +void heci_csr_disable_interrupts(struct iamt_heci_device *dev)
> +{
> + dev->host_hw_state &= ~H_IE;
> + heci_set_csr_register(dev);
> +}
> +
> +
> +/**
> + * _host_get_filled_slots - get number of device filled buffer slots
> + *
> + * @device: the device structure
> + *
> + * @return numer of filled slots
Not @return.
> + */
> +static unsigned char _host_get_filled_slots(struct iamt_heci_device *dev)
> +{
> + char read_ptr, write_ptr;
> +
> + read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8);
> + write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16);
> +
> + return (unsigned char) (write_ptr - read_ptr);
> +}
> +
> +/**
> + * host_buffer_is_empty - check if host buffer is empty.
> + *
> + * @dev: device object for our driver
> + *
> + * @return 1 if empty, 0 - otherwise.
Ditto.
> + */
> +int host_buffer_is_empty(struct iamt_heci_device *dev)
> +{
> + unsigned char filled_slots;
> +
> + dev->host_hw_state = read_heci_register(dev, H_CSR);
> + filled_slots = _host_get_filled_slots(dev);
> +
> + if (filled_slots > 0)
> + return 0;
> +
> + return 1;
> +}
> +
> +/**
> + * count_empty_write_slots - count write empty slots.
> + *
> + * @dev: device object for our driver
> + *
> + * @return -1(ESLOTS_OVERFLOW) if overflow, otherwise empty slots count
Ditto.
> + */
> +__s32 count_empty_write_slots(struct iamt_heci_device *dev)
> +{
> + unsigned char buffer_depth, filled_slots, empty_slots;
> +
> + buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
> + filled_slots = _host_get_filled_slots(dev);
> + empty_slots = buffer_depth - filled_slots;
> +
> + if (filled_slots > buffer_depth) {
> + /* overflow */
> + return -ESLOTS_OVERFLOW;
> + }
> +
> + return (__s32) empty_slots;
> +}
> +
> +/**
> + * heci_write_message - write a message to heci device.
> + *
> + * @dev: device object for our driver
> + * @heci_hdr: header of message
> + * @write_buffer: message buffer will be write
> + * @write_length: message size will be write
> + *
> + * @return 1 if success, 0 - otherwise.
Ditto.
> + */
> +int heci_write_message(struct iamt_heci_device *dev,
> + struct heci_msg_hdr *header,
> + unsigned char *write_buffer,
> + unsigned long write_length)
> +{
> +}
> +
> +/**
> + * count_full_read_slots - count read full slots.
> + *
> + * @dev: device object for our driver
> + *
> + * @return -1(ESLOTS_OVERFLOW) if overflow, otherwise filled slots count
Not @return.
> + */
> +__s32 count_full_read_slots(struct iamt_heci_device *dev)
> +{
> +}
> +
> +/**
> + * heci_read_slots - read a message from heci device.
> + *
> + * @dev: device object for our driver
> + * @buffer: message buffer will be write
> + * @buffer_length: message size will be read
> + */
> +void heci_read_slots(struct iamt_heci_device *dev,
> + unsigned char *buffer, unsigned long buffer_length)
> +{
> +}
> +
> +/**
> + * flow_ctrl_creds - check flow_control credentials.
> + *
> + * @dev: device object for our driver
> + * @file_ext: private data of the file object
> + *
> + * @return 1 if flow_ctrl_creds >0, 0 - otherwise.
Not @return. OK, I won't keep repeating this comment.
> + */
> +int flow_ctrl_creds(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> +}
> +
> +/**
> + * flow_ctrl_reduce - reduce flow_control.
> + *
> + * @dev: device object for our driver
> + * @file_ext: private data of the file object
> + */
> +void flow_ctrl_reduce(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> +}
> +
> +/**
> + * heci_send_flow_control - send flow control to fw.
> + *
> + * @dev: device object for our driver
> + * @file_ext: private data of the file object
> + *
> + * @return 1 if success, 0 - otherwise.
> + */
> +int heci_send_flow_control(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> +}
> +
> +/**
> + * other_client_is_connecting - check if other
> + * client with the same client id is connected.
> + *
> + * @dev: device object for our driver
> + * @file_ext: private data of the file object
> + *
> + * @return 1 if other client is connected, 0 - otherwise.
> + */
> +int other_client_is_connecting(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> +}
> +
> +/**
> + * heci_send_wd - send watch dog message to fw.
> + *
> + * @dev: device object for our driver
> + *
> + * @return 1 if success, 0 - otherwise.
> + */
> +int heci_send_wd(struct iamt_heci_device *dev)
> +{
> +}
> +
> +/**
> + * heci_disconnect - send disconnect message to fw.
> + *
> + * @dev: device object for our driver
> + * @file_ext: private data of the file object
> + *
> + * @return 1 if success, 0 - otherwise.
> + */
> +int heci_disconnect(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> +}
> +
> +/**
> + * heci_connect - send connect message to fw.
> + *
> + * @dev: device object for our driver
> + * @file_ext: private data of the file object
> + *
> + * @return 1 if success, 0 - otherwise.
> + */
> +int heci_connect(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> +}
> diff --git a/drivers/char/heci/heci_interface.h b/drivers/char/heci/heci_interface.h
> new file mode 100644
> index 0000000..a045853
> --- /dev/null
> +++ b/drivers/char/heci/heci_interface.h
> @@ -0,0 +1,170 @@
> +
> +#ifndef _HECI_INTERFACE_H_
> +#define _HECI_INTERFACE_H_
> +
> +
> +/* IOCTL commands */
> +#define IOCTL_HECI_GET_VERSION \
> + _IOWR('H' , 0x0, struct heci_message_data)
> +#define IOCTL_HECI_CONNECT_CLIENT \
> + _IOWR('H' , 0x01, struct heci_message_data)
> +#define IOCTL_HECI_WD \
> + _IOWR('H' , 0x02, struct heci_message_data)
> +#define IOCTL_HECI_BYPASS_WD \
> + _IOWR('H' , 0x10, struct heci_message_data)
> +
Needs an update to Documentation/ioctl-number.txt .
> +
> +#endif /* _HECI_INTERFACE_H_ */
> diff --git a/drivers/char/heci/heci_main.c b/drivers/char/heci/heci_main.c
> new file mode 100644
> index 0000000..ecc6031
> --- /dev/null
> +++ b/drivers/char/heci/heci_main.c
> @@ -0,0 +1,1523 @@
> +
> +/**
> + * Set up the cdev structure for heci device.
kernel-doc format:
* heci_registration_cdev - set up the cdev structure for the heci device
> + *
> + * @dev: char device struct
> + * @hminor: minor number for registration char device
> + * @fops: file operations structure
> + *
> + * @return 0 on success, <0 on failure.
> + */
> +static int heci_registration_cdev(struct cdev *dev, int hminor,
> + struct file_operations *fops)
> +{
> + int ret, devno = MKDEV(heci_major, hminor);
> +
> + cdev_init(dev, fops);
> + dev->owner = THIS_MODULE;
> + ret = cdev_add(dev, devno, 1);
> + /* Fail gracefully if need be */
> + if (ret) {
> + printk(KERN_ERR "heci: Error %d registering heci device %d\n",
> + ret, hminor);
> + }
> + return ret;
> +}
> +
> +/* Display the version of heci driver. */
> +static ssize_t version_show(struct class *dev, char *buf)
> +{
> + return sprintf(buf, "%s %s.\n",
> + heci_driver_string, heci_driver_version);
> +}
> +
> +static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
> +
> +/**
> + * heci_register_cdev - registers heci char device
> + *
> + * @return 0 on success, <0 on failure.
> + */
> +static int heci_register_cdev(void)
> +{
> +}
> +
> +
> +
> +
> +/**
> + * heci_open - the open function
Missing parameter descriptions.
> + */
> +static int heci_open(struct inode *inode, struct file *file)
> +{
> +}
> +
> +/**
> + * heci_release - the release function
Ditto.
> + */
> +static int heci_release(struct inode *inode, struct file *file)
> +{
> +}
> +
> +
> +/**
> + * heci_read - the read client message function.
Ditto.
> + */
> +static ssize_t heci_read(struct file *file, char __user *ubuf,
> + size_t length, loff_t *offset)
> +{
> +}
> +
> +/**
> + * heci_write - the write function.
Ditto.
> + */
> +static ssize_t heci_write(struct file *file, const char __user *ubuf,
> + size_t length, loff_t *offset)
> +{
> +}
> +
> +/**
> + * heci_ioctl - the IOCTL function
Tritto.
> + */
> +static int heci_ioctl(struct inode *inode, struct file *file,
> + unsigned int cmd, unsigned long data)
> +{
> +}
> +
> +/**
> + * heci_poll - the poll function
Again.
> + */
> +static unsigned int heci_poll(struct file *file, poll_table *wait)
> +{
> +}
> diff --git a/drivers/char/heci/interrupt.c b/drivers/char/heci/interrupt.c
> new file mode 100644
> index 0000000..b41e8d3
> --- /dev/null
> +++ b/drivers/char/heci/interrupt.c
> @@ -0,0 +1,1552 @@
> +
> +
> +/**
> + * _heci_cmpl: process completed operation.
* _heci_cmpl - process completed operation
> + *
> + * @file_ext: private data of the file object.
> + * @priv_cb_pos: callback block.
> + */
> +static void _heci_cmpl(struct heci_file_private *file_ext,
> + struct heci_cb_private *priv_cb_pos)
> +{
> +}
> +
> +/**
> + * _heci_cmpl_iamthif: process completed iamthif operation.
s/: / - /
> + *
> + * @dev: Device object for our driver.
> + * @priv_cb_pos: callback block.
> + */
> +static void _heci_cmpl_iamthif(struct iamt_heci_device *dev,
> + struct heci_cb_private *priv_cb_pos)
> +{
> +}
> +/**
> + * _heci_bh_iamthif_read: prepare to read iamthif data.
s/: / - /
> + *
> + * @dev: Device object for our driver.
> + * @slots: free slots.
> + *
> + * @return 0, OK; otherwise, error.
> + */
> +static int _heci_bh_iamthif_read(struct iamt_heci_device *dev, __s32 *slots)
> +{
> +}
> +
> +/**
> + * _heci_bh_close: process close related operation.
s/: / - /
> + *
> + * @dev: Device object for our driver.
> + * @slots: free slots.
> + * @priv_cb_pos: callback block.
> + * @file_ext: private data of the file object.
> + * @cmpl_list: complete list.
> + *
> + * @return 0, OK; otherwise, error.
> + */
> +static int _heci_bh_close(struct iamt_heci_device *dev, __s32 *slots,
> + struct heci_cb_private *priv_cb_pos,
> + struct heci_file_private *file_ext,
> + struct io_heci_list *cmpl_list)
> +{
> +}
> +
> +/**
> + * _heci_hb_close: process read related operation.
s/: / - /
> + *
> + * @dev: Device object for our driver.
> + * @slots: free slots.
> + * @priv_cb_pos: callback block.
> + * @file_ext: private data of the file object.
> + * @cmpl_list: complete list.
> + *
> + * @return 0, OK; otherwise, error.
> + */
> +static int _heci_bh_read(struct iamt_heci_device *dev, __s32 *slots,
> + struct heci_cb_private *priv_cb_pos,
> + struct heci_file_private *file_ext,
> + struct io_heci_list *cmpl_list)
> +{
> +}
> +
> +
> +/**
> + * _heci_bh_ioctl: process ioctl related operation.
s/: / - /
> + *
> + * @dev: Device object for our driver.
> + * @slots: free slots.
> + * @priv_cb_pos: callback block.
> + * @file_ext: private data of the file object.
> + * @cmpl_list: complete list.
> + *
> + * @return 0, OK; otherwise, error.
> + */
> +static int _heci_bh_ioctl(struct iamt_heci_device *dev, __s32 *slots,
> + struct heci_cb_private *priv_cb_pos,
> + struct heci_file_private *file_ext,
> + struct io_heci_list *cmpl_list)
> +{
> +}
> +
> +/**
> + * _heci_bh_cmpl: process completed and no-iamthif operation.
s/: / - /
> + *
> + * @dev: Device object for our driver.
> + * @slots: free slots.
> + * @priv_cb_pos: callback block.
> + * @file_ext: private data of the file object.
> + * @cmpl_list: complete list.
> + *
> + * @return 0, OK; otherwise, error.
> + */
> +static int _heci_bh_cmpl(struct iamt_heci_device *dev, __s32 *slots,
> + struct heci_cb_private *priv_cb_pos,
> + struct heci_file_private *file_ext,
> + struct io_heci_list *cmpl_list)
> +{
> +}
> +
> +/**
> + * _heci_bh_cmpl_iamthif: process completed iamthif operation.
s/: / - /
> + *
> + * @dev: Device object for our driver.
> + * @slots: free slots.
> + * @priv_cb_pos: callback block.
> + * @file_ext: private data of the file object.
> + * @cmpl_list: complete list.
> + *
> + * @return 0, OK; otherwise, error.
> + */
> +static int _heci_bh_cmpl_iamthif(struct iamt_heci_device *dev, __s32 *slots,
> + struct heci_cb_private *priv_cb_pos,
> + struct heci_file_private *file_ext,
> + struct io_heci_list *cmpl_list)
> +{
> +}
General (CodingStyle): functions should not begin with a blank line after the
opening {, nor should they have blank lines before the closing }. Yes, I saw both
of those.
---
~Randy
Linux Plumbers Conference, 17-19 September 2008, Portland, Oregon USA
http://linuxplumbersconf.org/
^ permalink raw reply [flat|nested] 42+ messages in thread
* [PATCH] Intel Management Engine Interface
@ 2008-07-17 18:27 Marcin Obara
2008-07-18 0:00 ` Randy Dunlap
` (3 more replies)
0 siblings, 4 replies; 42+ messages in thread
From: Marcin Obara @ 2008-07-17 18:27 UTC (permalink / raw)
To: linux-kernel
Fixed more issues raised on lkml after previous submission.
The Intel Management Engine Interface (aka HECI: Host Embedded
Controller Interface ) enables communication between the host OS and
the Management Engine firmware. MEI is bi-directional, and either the
host or Intel AMT firmware can initiate transactions.
The core hardware architecture of Intel Active Management Technology
(Intel AMT) is resident in firmware. The micro-controller within the
chipset's graphics and memory controller (GMCH) hub houses the
Management Engine (ME) firmware, which implements various services
on behalf of management applications.
Some of the ME subsystems that can be access via MEI driver:
- Intel(R) Quiet System Technology (QST) is implemented as a firmware
subsystem that runs in the ME. Programs that wish to expose the
health monitoring and fan speed control capabilities of Intel(R) QST
will need to use the MEI driver to communicate with the ME sub-system.
- ASF is the "Alert Standard Format" which is an DMTF manageability
standard. It is implemented in the PC's hardware and firmware, and is
managed from a remote console.
Most recent Intel desktop chipsets have one or more of the above ME
services. The MEI driver will make it possible to support the above
features on Linux and provides applications access to the ME and it's
features.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Signed-off-by: Marcin Obara <marcin.obara@intel.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 93fd6b2..adb913b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2195,6 +2195,15 @@ L: e1000-devel@lists.sourceforge.net
W: http://e1000.sourceforge.net/
S: Supported
+INTEL MANAGEABILITY ENGINE INTERFACE (HECI)
+P: Anas Nashif
+M: anas.nashif@intel.com
+P: Marcin Obara
+M: marcin.obara@intel.com
+W: http://www.openamt.org/
+L: openamt-devel@lists.sourceforge.net
+S: Supported
+
INTEL PRO/WIRELESS 2100 NETWORK CONNECTION SUPPORT
P: Zhu Yi
M: yi.zhu@intel.com
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 650e6b4..9872215 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -1103,6 +1103,7 @@ config DEVPORT
default y
source "drivers/s390/char/Kconfig"
+source "drivers/char/heci/Kconfig"
endmenu
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 0e0d12a..1d5e700 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -107,6 +107,7 @@ obj-$(CONFIG_IPMI_HANDLER) += ipmi/
obj-$(CONFIG_HANGCHECK_TIMER) += hangcheck-timer.o
obj-$(CONFIG_TCG_TPM) += tpm/
+obj-$(CONFIG_INTEL_MEI) += heci/
obj-$(CONFIG_PS3_FLASH) += ps3flash.o
diff --git a/drivers/char/heci/Kconfig b/drivers/char/heci/Kconfig
new file mode 100644
index 0000000..a4d8bf4
--- /dev/null
+++ b/drivers/char/heci/Kconfig
@@ -0,0 +1,12 @@
+#
+# HECI device configuration
+#
+
+config INTEL_MEI
+ tristate "Intel Management Engine Interface (MEI) Support"
+ depends on EXPERIMENTAL
+ ---help---
+ The Intel Management Engine Interface (Intel MEI) driver allows
+ applications to access the Active Management Technology
+ firmware and other Management Engine sub-systems.
+
diff --git a/drivers/char/heci/Makefile b/drivers/char/heci/Makefile
new file mode 100644
index 0000000..a2d7182
--- /dev/null
+++ b/drivers/char/heci/Makefile
@@ -0,0 +1,7 @@
+#
+## Makefile for the Intel MEI driver (heci)
+#
+
+obj-$(CONFIG_INTEL_MEI) += heci.o
+
+heci-objs := heci_init.o heci_interface.o heci_main.o interrupt.o io_heci.o
diff --git a/drivers/char/heci/heci.h b/drivers/char/heci/heci.h
new file mode 100644
index 0000000..daafbc8
--- /dev/null
+++ b/drivers/char/heci/heci.h
@@ -0,0 +1,176 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_H_
+#define _HECI_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+extern const struct guid heci_pthi_guid;
+extern const struct guid heci_wd_guid;
+extern const __u8 start_wd_params[];
+extern const __u8 stop_wd_params[];
+extern const __u8 heci_wd_state_independence_msg[3][4];
+
+/**
+ * heci device ID
+ */
+#define HECI_DEV_ID_82946GZ 0x2974 /* 82946GZ/GL */
+#define HECI_DEV_ID_82G35 0x2984 /* 82G35 Express */
+#define HECI_DEV_ID_82Q965 0x2994 /* 82Q963/Q965 */
+#define HECI_DEV_ID_82G965 0x29A4 /* 82P965/G965 */
+
+#define HECI_DEV_ID_82GM965 0x2A04 /* Mobile PM965/GM965 */
+#define HECI_DEV_ID_82GME965 0x2A14 /* Mobile GME965/GLE960 */
+
+#define HECI_DEV_ID_ICH9_82Q35 0x29B4 /* 82Q35 Express */
+#define HECI_DEV_ID_ICH9_82G33 0x29C4 /* 82G33/G31/P35/P31 Express */
+#define HECI_DEV_ID_ICH9_82Q33 0x29D4 /* 82Q33 Express */
+#define HECI_DEV_ID_ICH9_82X38 0x29E4 /* 82X38/X48 Express */
+#define HECI_DEV_ID_ICH9_3200 0x29F4 /* 3200/3210 Server */
+
+#define HECI_DEV_ID_ICH9_6 0x28B4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_7 0x28C4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_8 0x28D4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_9 0x28E4 /* Bearlake */
+#define HECI_DEV_ID_ICH9_10 0x28F4 /* Bearlake */
+
+#define HECI_DEV_ID_ICH9M_1 0x2A44 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_2 0x2A54 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_3 0x2A64 /* Cantiga */
+#define HECI_DEV_ID_ICH9M_4 0x2A74 /* Cantiga */
+
+#define HECI_DEV_ID_ICH10_1 0x2E04 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_2 0x2E14 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_3 0x2E24 /* Eaglelake */
+#define HECI_DEV_ID_ICH10_4 0x2E34 /* Eaglelake */
+
+/**
+ * heci init function prototypes
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev);
+void heci_reset(struct iamt_heci_device *dev, int interrupts);
+int heci_hw_init(struct iamt_heci_device *dev);
+int heci_task_initialize_clients(void *data);
+int heci_initialize_clients(struct iamt_heci_device *dev);
+struct heci_file_private *heci_alloc_file_private(struct file *file);
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev);
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext);
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id);
+
+/**
+ * interrupt function prototype
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id);
+
+void heci_wd_timer(unsigned long data);
+
+/**
+ * input output function prototype
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_connect_client(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file);
+
+int heci_ioctl_wd(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_bypass_wd(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_start_read(struct iamt_heci_device *device, int if_num,
+ struct heci_file_private *file_ext);
+
+int pthi_write(struct iamt_heci_device *device,
+ struct heci_cb_private *priv_cb);
+
+int pthi_read(struct iamt_heci_device *device, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset);
+
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *device,
+ struct file *file);
+
+void run_next_iamthif_cmd(struct iamt_heci_device *device);
+
+void heci_free_cb_private(struct heci_cb_private *priv_cb);
+
+/**
+ * heci_fe_same_id - tell if file private data have same id
+ *
+ * @fe1: private data of 1. file object
+ * @fe2: private data of 2. file object
+ *
+ * @return !=0 - if ids are the same, 0 - if differ.
+ */
+static inline int heci_fe_same_id(struct heci_file_private *fe1,
+ struct heci_file_private *fe2)
+{
+ return ((fe1->host_client_id == fe2->host_client_id)
+ && (fe1->me_client_id == fe2->me_client_id));
+}
+
+#endif /* _HECI_H_ */
diff --git a/drivers/char/heci/heci_data_structures.h b/drivers/char/heci/heci_data_structures.h
new file mode 100644
index 0000000..f75af25
--- /dev/null
+++ b/drivers/char/heci/heci_data_structures.h
@@ -0,0 +1,524 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_DATA_STRUCTURES_H_
+#define _HECI_DATA_STRUCTURES_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+
+/**
+ * error code definition
+ */
+#define ESLOTS_OVERFLOW 1
+#define ECORRUPTED_MESSAGE_HEADER 1000
+#define ECOMPLETE_MESSAGE 1001
+
+#define HECI_FC_MESSAGE_RESERVED_LENGTH 5
+
+/**
+ * Number of queue lists used by this driver
+ */
+#define HECI_IO_LISTS_NUMBER 7
+
+/**
+ * Maximum transmission unit (MTU) of heci messages
+ */
+#define IAMTHIF_MTU 4160
+
+
+/**
+ * HECI HW Section
+ */
+
+/* HECI registers */
+/* H_CB_WW - Host Circular Buffer (CB) Write Window register */
+#define H_CB_WW 0
+/* H_CSR - Host Control Status register */
+#define H_CSR 4
+/* ME_CB_RW - ME Circular Buffer Read Window register (read only) */
+#define ME_CB_RW 8
+/* ME_CSR_HA - ME Control Status Host Access register (read only) */
+#define ME_CSR_HA 0xC
+
+
+/* register bits of H_CSR (Host Control Status register) */
+/* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */
+#define H_CBD 0xFF000000
+/* Host Circular Buffer Write Pointer */
+#define H_CBWP 0x00FF0000
+/* Host Circular Buffer Read Pointer */
+#define H_CBRP 0x0000FF00
+/* Host Reset */
+#define H_RST 0x00000010
+/* Host Ready */
+#define H_RDY 0x00000008
+/* Host Interrupt Generate */
+#define H_IG 0x00000004
+/* Host Interrupt Status */
+#define H_IS 0x00000002
+/* Host Interrupt Enable */
+#define H_IE 0x00000001
+
+
+/* register bits of ME_CSR_HA (ME Control Status Host Access register) */
+/* ME CB (Circular Buffer) Depth HRA (Host Read Access)
+ * - host read only access to ME_CBD */
+#define ME_CBD_HRA 0xFF000000
+/* ME CB Write Pointer HRA - host read only access to ME_CBWP */
+#define ME_CBWP_HRA 0x00FF0000
+/* ME CB Read Pointer HRA - host read only access to ME_CBRP */
+#define ME_CBRP_HRA 0x0000FF00
+/* ME Reset HRA - host read only access to ME_RST */
+#define ME_RST_HRA 0x00000010
+/* ME Ready HRA - host read only access to ME_RDY */
+#define ME_RDY_HRA 0x00000008
+/* ME Interrupt Generate HRA - host read only access to ME_IG */
+#define ME_IG_HRA 0x00000004
+/* ME Interrupt Status HRA - host read only access to ME_IS */
+#define ME_IS_HRA 0x00000002
+/* ME Interrupt Enable HRA - host read only access to ME_IE */
+#define ME_IE_HRA 0x00000001
+
+#define HECI_MINORS_BASE 1
+#define HECI_MINORS_COUNT 1
+
+#define HECI_MINOR_NUMBER 1
+#define HECI_MAX_OPEN_HANDLE_COUNT 253
+
+/**
+ * debug kernel print macro define
+ */
+extern int heci_debug;
+
+#define DBG(format, arg...) do { \
+ if (heci_debug) \
+ printk(KERN_ERR "%s: " format , __func__ , ## arg); \
+} while (0)
+
+
+/**
+ * time to wait HECI become ready after init
+ */
+#define HECI_INTEROP_TIMEOUT (HZ * 7)
+
+/**
+ * watch dog definition
+ */
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+#define HECI_WD_STATE_INDEPENDENCE_MSG_SENT (1 << 0)
+
+#define HECI_WD_HOST_CLIENT_ID 1
+#define HECI_IAMTHIF_HOST_CLIENT_ID 2
+
+struct guid {
+ __u32 data1;
+ __u16 data2;
+ __u16 data3;
+ __u8 data4[8];
+} __attribute__((packed));
+
+/* File state */
+enum file_state {
+ HECI_FILE_INITIALIZING = 0,
+ HECI_FILE_CONNECTING,
+ HECI_FILE_CONNECTED,
+ HECI_FILE_DISCONNECTING,
+ HECI_FILE_DISCONNECTED
+};
+
+/* HECI device states */
+enum heci_states {
+ HECI_INITIALIZING = 0,
+ HECI_ENABLED,
+ HECI_RESETING,
+ HECI_DISABLED,
+ HECI_RECOVERING_FROM_RESET,
+ HECI_POWER_DOWN,
+ HECI_POWER_UP
+};
+
+enum iamthif_states {
+ HECI_IAMTHIF_IDLE,
+ HECI_IAMTHIF_WRITING,
+ HECI_IAMTHIF_FLOW_CONTROL,
+ HECI_IAMTHIF_READING,
+ HECI_IAMTHIF_READ_COMPLETE
+};
+
+enum heci_file_transaction_states {
+ HECI_IDLE,
+ HECI_WRITING,
+ HECI_WRITE_COMPLETE,
+ HECI_FLOW_CONTROL,
+ HECI_READING,
+ HECI_READ_COMPLETE
+};
+
+/* HECI CB */
+enum heci_cb_major_types {
+ HECI_READ = 0,
+ HECI_WRITE,
+ HECI_IOCTL,
+ HECI_OPEN,
+ HECI_CLOSE
+};
+
+/* HECI user data struct */
+struct heci_message_data {
+ __u32 size;
+ char *data;
+} __attribute__((packed));
+
+#define HECI_CONNECT_TIMEOUT 3 /* at least 2 seconds */
+
+#define IAMTHIF_STALL_TIMER 12 /* seconds */
+#define IAMTHIF_READ_TIMER 15 /* seconds */
+
+struct heci_cb_private {
+ struct list_head cb_list;
+ enum heci_cb_major_types major_file_operations;
+ void *file_private;
+ struct heci_message_data request_buffer;
+ struct heci_message_data response_buffer;
+ unsigned long information;
+ unsigned long read_time;
+ struct file *file_object;
+};
+
+/* Private file struct */
+struct heci_file_private {
+ struct list_head link;
+ struct file *file;
+ enum file_state state;
+ wait_queue_head_t tx_wait;
+ wait_queue_head_t rx_wait;
+ wait_queue_head_t wait;
+ spinlock_t file_lock; /* file lock */
+ spinlock_t read_io_lock; /* read lock */
+ spinlock_t write_io_lock; /* write lock */
+ int read_pending;
+ int status;
+ /* ID of client connected */
+ __u8 host_client_id;
+ __u8 me_client_id;
+ __u8 flow_ctrl_creds;
+ __u8 timer_count;
+ enum heci_file_transaction_states reading_state;
+ enum heci_file_transaction_states writing_state;
+ int sm_state;
+ struct heci_cb_private *read_cb;
+};
+
+struct io_heci_list {
+ struct heci_cb_private heci_cb;
+ int status;
+ struct iamt_heci_device *device_extension;
+};
+
+struct heci_driver_version {
+ __u8 major;
+ __u8 minor;
+ __u8 hotfix;
+ __u16 build;
+} __attribute__((packed));
+
+
+struct heci_client {
+ __u32 max_msg_length;
+ __u8 protocol_version;
+} __attribute__((packed));
+
+/*
+ * HECI BUS Interface Section
+ */
+struct heci_msg_hdr {
+ __u32 me_addr:8;
+ __u32 host_addr:8;
+ __u32 length:9;
+ __u32 reserved:6;
+ __u32 msg_complete:1;
+} __attribute__((packed));
+
+
+struct hbm_cmd {
+ __u8 cmd:7;
+ __u8 is_response:1;
+} __attribute__((packed));
+
+
+struct heci_bus_message {
+ struct hbm_cmd cmd;
+ __u8 command_specific_data[];
+} __attribute__((packed));
+
+struct hbm_version {
+ __u8 minor_version;
+ __u8 major_version;
+} __attribute__((packed));
+
+struct hbm_host_version_request {
+ struct hbm_cmd cmd;
+ __u8 reserved;
+ struct hbm_version host_version;
+} __attribute__((packed));
+
+struct hbm_host_version_response {
+ struct hbm_cmd cmd;
+ int host_version_supported;
+ struct hbm_version me_max_version;
+} __attribute__((packed));
+
+struct hbm_host_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_stop_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_me_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_enum_request {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_host_enum_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+ __u8 valid_addresses[32];
+} __attribute__((packed));
+
+struct heci_client_properties {
+ struct guid protocol_name;
+ __u8 protocol_version;
+ __u8 max_number_of_connections;
+ __u8 fixed_address;
+ __u8 single_recv_buf;
+ __u32 max_msg_length;
+} __attribute__((packed));
+
+struct hbm_props_request {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+
+struct hbm_props_response {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 status;
+ __u8 reserved[1];
+ struct heci_client_properties client_properties;
+} __attribute__((packed));
+
+struct hbm_client_connect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved;
+} __attribute__((packed));
+
+struct hbm_client_connect_response {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 status;
+} __attribute__((packed));
+
+struct hbm_client_disconnect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[1];
+} __attribute__((packed));
+
+struct hbm_flow_control {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[HECI_FC_MESSAGE_RESERVED_LENGTH];
+} __attribute__((packed));
+
+struct heci_me_client {
+ struct heci_client_properties props;
+ __u8 client_id;
+ __u8 flow_ctrl_creds;
+} __attribute__((packed));
+
+/* private device struct */
+struct iamt_heci_device {
+ struct pci_dev *pdev; /* pointer to pci device struct */
+ /*
+ * lists of queues
+ */
+ /* array of pointers to aio lists */
+ struct io_heci_list *io_list_array[HECI_IO_LISTS_NUMBER];
+ struct io_heci_list read_list; /* driver read queue */
+ struct io_heci_list write_list; /* driver write queue */
+ struct io_heci_list write_waiting_list; /* write waiting queue */
+ struct io_heci_list ctrl_wr_list; /* managed write IOCTL list */
+ struct io_heci_list ctrl_rd_list; /* managed read IOCTL list */
+ struct io_heci_list pthi_cmd_list; /* PTHI list for cmd waiting */
+
+ /* driver managed PTHI list for reading completed pthi cmd data */
+ struct io_heci_list pthi_read_complete_list;
+ /*
+ * list of files
+ */
+ struct list_head file_list;
+ /*
+ * memory of device
+ */
+ unsigned int mem_base;
+ unsigned int mem_length;
+ char *mem_addr;
+ /*
+ * lock for the device
+ */
+ spinlock_t device_lock; /* device lock*/
+ struct work_struct work;
+ int recvd_msg;
+
+ struct task_struct *reinit_tsk;
+
+ struct timer_list wd_timer;
+ /*
+ * hw states of host and fw(ME)
+ */
+ __u32 host_hw_state;
+ __u32 me_hw_state;
+ /*
+ * waiting queue for receive message from FW
+ */
+ wait_queue_head_t wait_recvd_msg;
+ wait_queue_head_t wait_stop_wd;
+ /*
+ * heci device states
+ */
+ enum heci_states heci_state;
+ int stop;
+
+ __u32 extra_write_index;
+ __u32 rd_msg_buf[128]; /* used for control messages */
+ __u32 wr_msg_buf[128]; /* used for control messages */
+ __u32 ext_msg_buf[8]; /* for control responses */
+ __u32 rd_msg_hdr;
+
+ struct hbm_version version;
+
+ int host_buffer_is_empty;
+ struct heci_file_private wd_file_ext;
+ struct heci_me_client *me_clients; /* Note: memory has to be allocated*/
+ __u8 heci_me_clients[32]; /* list of existing clients */
+ __u8 num_heci_me_clients;
+ __u8 heci_host_clients[32]; /* list of existing clients */
+ __u8 current_host_client_id;
+
+ int wd_pending;
+ int wd_stoped;
+ __u16 wd_timeout; /* seconds ((wd_data[1] << 8) + wd_data[0]) */
+ unsigned char wd_data[HECI_START_WD_DATA_SIZE];
+
+
+ __u16 wd_due_counter;
+ int asf_mode;
+ int wd_bypass; /* if 1, don't refresh watchdog ME client */
+
+ struct file *iamthif_file_object;
+ struct heci_file_private iamthif_file_ext;
+ int iamthif_ioctl;
+ int iamthif_canceled;
+ __u32 iamthif_timer;
+ __u32 iamthif_stall_timer;
+ unsigned char iamthif_msg_buf[IAMTHIF_MTU];
+ __u32 iamthif_msg_buf_size;
+ __u32 iamthif_msg_buf_index;
+ int iamthif_flow_control_pending;
+ enum iamthif_states iamthif_state;
+
+ struct heci_cb_private *iamthif_current_cb;
+ __u8 write_hang;
+ int need_reset;
+ long open_handle_count;
+
+};
+
+/**
+ * read_heci_register - Read a byte from the heci device
+ *
+ * @device: the device structure
+ * @offset: offset from which to read the data
+ *
+ * @return the byte read.
+ */
+__u32 read_heci_register(struct iamt_heci_device *device,
+ unsigned long offset);
+
+/**
+ * write_heci_register - Write 4 bytes to the heci device
+ *
+ * @device: the device structure
+ * @offset: offset from which to write the data
+ * @value: the byte to write
+ */
+void write_heci_register(struct iamt_heci_device *device, unsigned long offset,
+ __u32 value);
+
+#endif /* _HECI_DATA_STRUCTURES_H_ */
diff --git a/drivers/char/heci/heci_init.c b/drivers/char/heci/heci_init.c
new file mode 100644
index 0000000..8eb42a0
--- /dev/null
+++ b/drivers/char/heci/heci_init.c
@@ -0,0 +1,1085 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/moduleparam.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+
+#include "heci_data_structures.h"
+#include "heci_interface.h"
+#include "heci.h"
+
+
+const __u8 watch_dog_data[] = {
+ 1, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
+};
+const __u8 start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 };
+const __u8 stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10 };
+
+const __u8 heci_wd_state_independence_msg[3][4] = {
+ {0x05, 0x02, 0x51, 0x10},
+ {0x05, 0x02, 0x52, 0x10},
+ {0x07, 0x02, 0x01, 0x10}
+};
+
+const struct guid heci_asf_guid = {
+ 0x75B30CD6, 0xA29E, 0x4AF7,
+ {0xA7, 0x12, 0xE6, 0x17, 0x43, 0x93, 0xC8, 0xA6}
+};
+const struct guid heci_wd_guid = {
+ 0x05B79A6F, 0x4628, 0x4D7F,
+ {0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB}
+};
+const struct guid heci_pthi_guid = {
+ 0x12f80028, 0xb4b7, 0x4b2d,
+ {0xac, 0xa8, 0x46, 0xe0, 0xff, 0x65, 0x81, 0x4c}
+};
+
+
+/**
+ * heci init function prototypes
+ */
+static void heci_check_asf_mode(struct iamt_heci_device *dev);
+static int host_start_message(struct iamt_heci_device *dev);
+static int host_enum_clients_message(struct iamt_heci_device *dev);
+static int allocate_me_clients_storage(struct iamt_heci_device *dev);
+static void host_init_wd(struct iamt_heci_device *dev);
+static void host_init_iamthif(struct iamt_heci_device *dev);
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout);
+
+
+/**
+ * heci_initialize_list - Sets up a queue list.
+ *
+ * @list: An instance of our list structure
+ * @dev: Device object for our driver
+ */
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev)
+{
+ /* initialize our queue list */
+ INIT_LIST_HEAD(&list->heci_cb.cb_list);
+ list->status = 0;
+ list->device_extension = dev;
+}
+
+/**
+ * heci_flush_queues - flush our queues list belong to file_ext.
+ *
+ * @dev: Device object for our driver
+ * @file_ext: private data of the file object
+ *
+ */
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int i;
+
+ if (!dev || !file_ext)
+ return;
+
+ /* flush our queue list belong to file_ext */
+ for (i = 0; i < HECI_IO_LISTS_NUMBER; i++) {
+ DBG("remove list entry belong to file_ext\n");
+ heci_flush_list(dev->io_list_array[i], file_ext);
+ }
+}
+
+
+/**
+ * heci_flush_list - remove list entry belong to file_ext.
+ *
+ * @list: An instance of our list structure
+ * @file_ext: private data of the file object
+ */
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext)
+{
+ struct heci_file_private *file_ext_tmp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if (!list || !file_ext)
+ return;
+
+ if (list->status != 0)
+ return;
+
+ if (list_empty(&list->heci_cb.cb_list))
+ return;
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &list->heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos) {
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext_tmp) {
+ if (heci_fe_same_id(file_ext, file_ext_tmp))
+ list_del(&priv_cb_pos->cb_list);
+ }
+ }
+ }
+}
+
+/**
+ * heci_reset_iamthif_params - initializes heci device iamthif
+ * @dev: The heci device structure
+ */
+static void heci_reset_iamthif_params(struct iamt_heci_device *dev)
+{
+ /* reset iamthif parameters. */
+ dev->iamthif_current_cb = NULL;
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_file_ext.file = NULL;
+ dev->iamthif_ioctl = 0;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+}
+
+/**
+ * init_heci_device - allocates and initializes the heci device structure
+ * @pdev: The pci device structure
+ *
+ * @return The heci_device_device pointer on success, NULL on failure.
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev)
+{
+ int i;
+ struct iamt_heci_device *device;
+
+ device = kzalloc(sizeof(struct iamt_heci_device), GFP_KERNEL);
+ if (!device)
+ return NULL;
+
+ /* setup our list array */
+ device->io_list_array[0] = &device->read_list;
+ device->io_list_array[1] = &device->write_list;
+ device->io_list_array[2] = &device->write_waiting_list;
+ device->io_list_array[3] = &device->ctrl_wr_list;
+ device->io_list_array[4] = &device->ctrl_rd_list;
+ device->io_list_array[5] = &device->pthi_cmd_list;
+ device->io_list_array[6] = &device->pthi_read_complete_list;
+ INIT_LIST_HEAD(&device->file_list);
+ INIT_LIST_HEAD(&device->wd_file_ext.link);
+ INIT_LIST_HEAD(&device->iamthif_file_ext.link);
+ spin_lock_init(&device->device_lock);
+ init_waitqueue_head(&device->wait_recvd_msg);
+ init_waitqueue_head(&device->wait_stop_wd);
+ device->heci_state = HECI_INITIALIZING;
+ device->iamthif_state = HECI_IAMTHIF_IDLE;
+
+ /* init work for schedule work */
+ INIT_WORK(&device->work, NULL);
+ for (i = 0; i < HECI_IO_LISTS_NUMBER; i++)
+ heci_initialize_list(device->io_list_array[i], device);
+ device->pdev = pdev;
+ return device;
+}
+
+
+
+
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout)
+{
+ return wait_event_interruptible_timeout(dev->wait_recvd_msg,
+ (dev->recvd_msg), timeout);
+}
+
+/**
+ * heci_hw_init - init host and fw to start work.
+ *
+ * @dev: Device object for our driver
+ *
+ * @return 0 on success, <0 on failure.
+ */
+int heci_hw_init(struct iamt_heci_device *dev)
+{
+ int err = 0;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ DBG("host_hw_state = 0x%08x, mestate = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ /* acknowledge interrupt and stop interupts */
+ heci_set_csr_register(dev);
+ }
+ dev->recvd_msg = 0;
+ DBG("reset in start the heci device.\n");
+
+ heci_reset(dev, 1);
+
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ /* wait for ME to turn on ME_RDY */
+ if (!dev->recvd_msg)
+ err = heci_wait_event_int_timeout(dev, HECI_INTEROP_TIMEOUT);
+
+ if (!err && !dev->recvd_msg) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("wait_event_interruptible_timeout failed"
+ "on wait for ME to turn on ME_RDY.\n");
+ return -ENODEV;
+ } else {
+ if (!(((dev->host_hw_state & H_RDY) == H_RDY)
+ && ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state,
+ dev->me_hw_state);
+
+ if (!(dev->host_hw_state & H_RDY) != H_RDY)
+ DBG("host turn off H_RDY.\n");
+
+ if (!(dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ DBG("ME turn off ME_RDY.\n");
+
+ printk(KERN_ERR
+ "heci: link layer initialization failed.\n");
+ return -ENODEV;
+ }
+ }
+ dev->recvd_msg = 0;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+ DBG("ME turn on ME_RDY and host turn on H_RDY.\n");
+ printk(KERN_INFO "heci: link layer has been established.\n");
+ return 0;
+}
+
+/**
+ * heci_hw_reset - reset fw via heci csr register.
+ *
+ * @dev: Device object for our driver
+ * @interrupts: if interrupt should be enable after reset.
+ */
+static void heci_hw_reset(struct iamt_heci_device *dev, int interrupts)
+{
+ dev->host_hw_state |= (H_RST | H_IG);
+
+ if (interrupts)
+ heci_csr_enable_interrupts(dev);
+ else
+ heci_csr_disable_interrupts(dev);
+
+ BUG_ON((dev->host_hw_state & H_RST) != H_RST);
+ BUG_ON((dev->host_hw_state & H_RDY) != 0);
+}
+
+/**
+ * heci_reset - reset host and fw.
+ *
+ * @dev: Device object for our driver
+ * @interrupts: if interrupt should be enable after reset.
+ */
+void heci_reset(struct iamt_heci_device *dev, int interrupts)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int unexpected = 0;
+
+ if (dev->heci_state == HECI_RECOVERING_FROM_RESET) {
+ dev->need_reset = 1;
+ return;
+ }
+
+ if (dev->heci_state != HECI_INITIALIZING &&
+ dev->heci_state != HECI_DISABLED &&
+ dev->heci_state != HECI_POWER_DOWN &&
+ dev->heci_state != HECI_POWER_UP)
+ unexpected = 1;
+
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+
+ DBG("before reset host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ heci_hw_reset(dev, interrupts);
+
+ dev->host_hw_state &= ~H_RST;
+ dev->host_hw_state |= H_IG;
+
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+
+ DBG("currently saved host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ dev->need_reset = 0;
+
+ if (dev->heci_state != HECI_INITIALIZING) {
+ if ((dev->heci_state != HECI_DISABLED) &&
+ (dev->heci_state != HECI_POWER_DOWN))
+ dev->heci_state = HECI_RESETING;
+
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->flow_ctrl_creds = 0;
+ file_pos->read_cb = NULL;
+ file_pos->timer_count = 0;
+ }
+ /* remove entry if already in list */
+ DBG("list del iamthif and wd file list.\n");
+ heci_remove_client_from_file_list(dev,
+ dev->wd_file_ext.host_client_id);
+
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+
+ heci_reset_iamthif_params(dev);
+ dev->wd_due_counter = 0;
+ dev->extra_write_index = 0;
+ }
+
+ dev->num_heci_me_clients = 0;
+ dev->rd_msg_hdr = 0;
+ dev->stop = 0;
+ dev->wd_pending = 0;
+
+ /* update the state of the registers after reset */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ DBG("after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if (unexpected)
+ printk(KERN_WARNING "unexpected heci reset.\n");
+
+ /* Wake up all readings so they can be interrupted */
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (&file_pos->rx_wait &&
+ waitqueue_active(&file_pos->rx_wait)) {
+ printk(KERN_INFO "heci: Waking up client!\n");
+ wake_up_interruptible(&file_pos->rx_wait);
+ }
+ }
+ /* remove all waiting requests */
+ if (dev->write_list.status == 0 &&
+ !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos) {
+ list_del(&priv_cb_pos->cb_list);
+ heci_free_cb_private(priv_cb_pos);
+ }
+ }
+ }
+}
+
+/**
+ * heci_initialize_clients - routine.
+ *
+ * @dev: Device object for our driver
+ *
+ */
+int heci_initialize_clients(struct iamt_heci_device *dev)
+{
+ int status;
+
+ msleep(100); /* FW needs time to be ready to talk with us */
+ DBG("link is established start sending messages.\n");
+ /* link is established start sending messages. */
+ status = host_start_message(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("start sending messages failed.\n");
+ return status;
+ }
+ /* enumerate clients */
+
+ status = host_enum_clients_message(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("enum clients failed.\n");
+ return status;
+ }
+ /* allocate storage for ME clients representation */
+ status = allocate_me_clients_storage(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->num_heci_me_clients = 0;
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("allocate clients failed.\n");
+ return status;
+ }
+
+ heci_check_asf_mode(dev);
+ /*heci initialization wd */
+ host_init_wd(dev);
+ /*heci initialization iamthif client */
+ host_init_iamthif(dev);
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->need_reset) {
+ dev->need_reset = 0;
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+
+ memset(dev->heci_host_clients, 0, sizeof(dev->heci_host_clients));
+ dev->open_handle_count = 0;
+ dev->heci_host_clients[0] |= 7;
+ dev->current_host_client_id = 3;
+ dev->heci_state = HECI_ENABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("initialization heci clients successful.\n");
+ return 0;
+}
+
+/**
+ * heci_task_initialize_clients - routine.
+ *
+ * @data: Device object for our driver
+ *
+ */
+int heci_task_initialize_clients(void *data)
+{
+ int ret;
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->reinit_tsk != NULL) {
+ spin_unlock_bh(&dev->device_lock);
+ DBG("reinit task already started.\n");
+ return 0;
+ }
+ dev->reinit_tsk = current;
+ current->flags |= PF_NOFREEZE;
+ spin_unlock_bh(&dev->device_lock);
+
+ ret = heci_initialize_clients(dev);
+
+ spin_lock_bh(&dev->device_lock);
+ dev->reinit_tsk = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ return ret;
+}
+
+/**
+ * host_start_message - heci host send start message.
+ *
+ * @dev: Device object for our driver
+ *
+ * @return 0 on success, <0 on failure.
+ */
+static int host_start_message(struct iamt_heci_device *dev)
+{
+ long timeout = 60; /* 60 second */
+
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_version_request *host_start_req;
+ struct hbm_host_stop_request *host_stop_req;
+ int err = 0;
+
+ /* host start message */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_version_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_start_req =
+ (struct hbm_host_version_request *) &dev->wr_msg_buf[1];
+ memset(host_start_req, 0, sizeof(struct hbm_host_version_request));
+ host_start_req->cmd.cmd = HOST_START_REQ_CMD;
+ host_start_req->host_version.major_version = HBM_MAJOR_VERSION;
+ host_start_req->host_version.minor_version = HBM_MINOR_VERSION;
+ dev->recvd_msg = 0;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_start_req),
+ heci_hdr->length)) {
+ DBG("send version to fw fail.\n");
+ return -ENODEV;
+ }
+ DBG("call wait_event_interruptible_timeout for response message.\n");
+ /* wait for response */
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait_timeout failed on host start response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ DBG("wait_timeout successful on host start response message.\n");
+ if ((dev->version.major_version != HBM_MAJOR_VERSION) ||
+ (dev->version.minor_version != HBM_MINOR_VERSION)) {
+ /* send stop message */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_stop_req =
+ (struct hbm_host_stop_request *) &dev->wr_msg_buf[1];
+
+ memset(host_stop_req, 0, sizeof(struct hbm_host_stop_request));
+ host_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ host_stop_req->reason = DRIVER_STOP_REQUEST;
+ heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_stop_req),
+ heci_hdr->length);
+ DBG("version mismatch.\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/**
+ * host_enum_clients_message - host send enumeration client request message.
+ *
+ * @dev: Device object for our driver
+ * @return 0 on success, <0 on failure.
+ */
+static int host_enum_clients_message(struct iamt_heci_device *dev)
+{
+ long timeout = 5; /*5 second */
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_enum_request *host_enum_req;
+ int err = 0;
+ __u8 i, j;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ /* enumerate clients */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_enum_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1];
+ memset(host_enum_req, 0, sizeof(struct hbm_host_enum_request));
+ host_enum_req->cmd.cmd = HOST_ENUM_REQ_CMD;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_enum_req),
+ heci_hdr->length)) {
+ DBG("send enumeration request failed.\n");
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait_event_interruptible_timeout failed "
+ "on enumeration clients response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+
+ spin_lock_bh(&dev->device_lock);
+ /* count how many ME clients we have */
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0)
+ dev->num_heci_me_clients++;
+
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ return 0;
+}
+
+/**
+ * host_client_properties - reads properties for client
+ *
+ * @dev: Device object for our driver
+ * @idx: client index in me client array
+ * @client_id: id of the client
+ *
+ * @return 0 on success, <0 on failure.
+ */
+static int host_client_properties(struct iamt_heci_device *dev,
+ struct heci_me_client *client)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_props_request *host_cli_req;
+ int err;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_props_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_cli_req = (struct hbm_props_request *) &dev->wr_msg_buf[1];
+ memset(host_cli_req, 0, sizeof(struct hbm_props_request));
+ host_cli_req->cmd.cmd = HOST_CLIENT_PROPERTEIS_REQ_CMD;
+ host_cli_req->address = client->client_id;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_cli_req),
+ heci_hdr->length)) {
+ DBG("send props request failed.\n");
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev, 10 * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait failed on props resp msg.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ return 0;
+}
+
+/**
+ * allocate_me_clients_storage - allocate storage for me clients
+ *
+ * @dev: Device object for our driver
+ *
+ * @return 0 on success, <0 on failure.
+ */
+static int allocate_me_clients_storage(struct iamt_heci_device *dev)
+{
+ struct heci_me_client *clients;
+ struct heci_me_client *client;
+ __u8 num, i, j;
+ int err;
+
+ if (dev->num_heci_me_clients <= 0)
+ return 0;
+
+ spin_lock_bh(&dev->device_lock);
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ /* allocate storage for ME clients representation */
+ clients = kcalloc(dev->num_heci_me_clients,
+ sizeof(struct heci_me_client), GFP_KERNEL);
+ if (!clients) {
+ DBG("memory allocation for ME clients failed.\n");
+ return -ENOMEM;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ dev->me_clients = clients;
+ spin_unlock_bh(&dev->device_lock);
+
+ num = 0;
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0) {
+ client = &dev->me_clients[num];
+ client->client_id = (i * 8) + j;
+ client->flow_ctrl_creds = 0;
+ err = host_client_properties(dev, client);
+ if (err != 0) {
+ spin_lock_bh(&dev->device_lock);
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+ spin_unlock_bh(&dev->device_lock);
+ return err;
+ }
+ num++;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * heci_init_file_private - initializes private file structure.
+ *
+ * @priv: private file structure to be initialized
+ * @file: the file structure
+ *
+ */
+static void heci_init_file_private(struct heci_file_private *priv,
+ struct file *file)
+{
+ memset(priv, 0, sizeof(struct heci_file_private));
+ spin_lock_init(&priv->file_lock);
+ spin_lock_init(&priv->read_io_lock);
+ spin_lock_init(&priv->write_io_lock);
+ init_waitqueue_head(&priv->wait);
+ init_waitqueue_head(&priv->rx_wait);
+ DBG("priv->rx_wait =%p\n", &priv->rx_wait);
+ init_waitqueue_head(&priv->tx_wait);
+ INIT_LIST_HEAD(&priv->link);
+ priv->reading_state = HECI_IDLE;
+ priv->writing_state = HECI_IDLE;
+}
+
+/**
+ * heci_find_me_client - search for ME client guid
+ * sets client_id in heci_file_private if found
+ * @dev: Device object for our driver
+ * @priv: private file structure to set client_id in
+ * @cguid: searched guid of ME client
+ * @client_id: id of host client to be set in file private structure
+ *
+ * @return ME client index
+ */
+static __u8 heci_find_me_client(struct iamt_heci_device *dev,
+ struct heci_file_private *priv,
+ const struct guid *cguid, __u8 client_id)
+{
+ __u8 i;
+
+ if ((dev == NULL) || (priv == NULL) || (cguid == NULL))
+ return 0;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(cguid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ priv->me_client_id = dev->me_clients[i].client_id;
+ priv->state = HECI_FILE_CONNECTING;
+ priv->host_client_id = client_id;
+
+ list_add_tail(&priv->link, &dev->file_list);
+ return i;
+ }
+ }
+ return 0;
+}
+
+/**
+ * heci_check_asf_mode - check for ASF client
+ *
+ * @dev: Device object for our driver
+ *
+ */
+static void heci_check_asf_mode(struct iamt_heci_device *dev)
+{
+ __u8 i;
+
+ spin_lock_bh(&dev->device_lock);
+ dev->asf_mode = 0;
+ /* find ME ASF client - otherwise assume AMT mode */
+ DBG("find ME ASF client - otherwise assume AMT mode.\n");
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_asf_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ dev->asf_mode = 1;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("found ME ASF client.\n");
+ return;
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+ DBG("assume AMT mode.\n");
+}
+
+/**
+ * heci_connect_me_client - connect ME client
+ * @dev: Device object for our driver
+ * @priv: private file structure
+ * @timeout: connect timeout in seconds
+ *
+ * @return 1 - if connected, 0 - if not
+ */
+static __u8 heci_connect_me_client(struct iamt_heci_device *dev,
+ struct heci_file_private *priv,
+ long timeout)
+{
+ int err = 0;
+
+ if ((dev == NULL) || (priv == NULL))
+ return 0;
+
+ if (!heci_connect(dev, priv)) {
+ DBG("failed to call heci_connect for client_id=%d.\n",
+ priv->host_client_id);
+ spin_lock_bh(&dev->device_lock);
+ heci_remove_client_from_file_list(dev, priv->host_client_id);
+ priv->state = HECI_FILE_DISCONNECTED;
+ spin_unlock_bh(&dev->device_lock);
+ return 0;
+ }
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == priv->state ||
+ HECI_FILE_DISCONNECTED == priv->state),
+ timeout * HZ);
+ if (HECI_FILE_CONNECTED != priv->state) {
+ spin_lock_bh(&dev->device_lock);
+ heci_remove_client_from_file_list(dev, priv->host_client_id);
+ DBG("failed to connect client_id=%d state=%d.\n",
+ priv->host_client_id, priv->state);
+ if (err)
+ DBG("failed connect err=%08x\n", err);
+ priv->state = HECI_FILE_DISCONNECTED;
+ spin_unlock_bh(&dev->device_lock);
+ return 0;
+ }
+ DBG("successfully connected client_id=%d.\n",
+ priv->host_client_id);
+ return 1;
+}
+
+/**
+ * host_init_wd - heci initialization wd.
+ *
+ * @dev: Device object for our driver
+ *
+ */
+static void host_init_wd(struct iamt_heci_device *dev)
+{
+
+ spin_lock_bh(&dev->device_lock);
+
+ heci_init_file_private(&dev->wd_file_ext, NULL);
+
+ /* look for WD client and connect to it */
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTED;
+ dev->wd_timeout = 0;
+
+ if (dev->asf_mode) {
+ memcpy(dev->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
+ } else {
+ /* AMT mode */
+ dev->wd_timeout = AMT_WD_VALUE;
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ memcpy(dev->wd_data, start_wd_params, HECI_WD_PARAMS_SIZE);
+ memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
+ &dev->wd_timeout, sizeof(__u16));
+ }
+
+ /* find ME WD client */
+ heci_find_me_client(dev, &dev->wd_file_ext,
+ &heci_wd_guid, HECI_WD_HOST_CLIENT_ID);
+ spin_unlock_bh(&dev->device_lock);
+
+ DBG("check wd_file_ext\n");
+ if (HECI_FILE_CONNECTING == dev->wd_file_ext.state) {
+ if (heci_connect_me_client(dev, &dev->wd_file_ext, 15) == 1) {
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 1;
+ else
+ dev->wd_due_counter = 0;
+ DBG("successfully connected to WD client.\n");
+ }
+ } else
+ DBG("failed to find WD client.\n");
+
+
+ spin_lock_bh(&dev->device_lock);
+ dev->wd_timer.function = &heci_wd_timer;
+ dev->wd_timer.data = (unsigned long) dev;
+ spin_unlock_bh(&dev->device_lock);
+}
+
+
+/**
+ * host_init_iamthif - heci initialization iamthif client.
+ *
+ * @dev: Device object for our driver
+ *
+ */
+static void host_init_iamthif(struct iamt_heci_device *dev)
+{
+ __u8 i;
+
+ spin_lock_bh(&dev->device_lock);
+
+ heci_init_file_private(&dev->iamthif_file_ext, NULL);
+ dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTED;
+
+ /* find ME PTHI client */
+ i = heci_find_me_client(dev, &dev->iamthif_file_ext,
+ &heci_pthi_guid, HECI_IAMTHIF_HOST_CLIENT_ID);
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTING) {
+ DBG("failed to find iamthif client.\n");
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ BUG_ON(dev->me_clients[i].props.max_msg_length != IAMTHIF_MTU);
+
+ spin_unlock_bh(&dev->device_lock);
+ if (heci_connect_me_client(dev, &dev->iamthif_file_ext, 15) == 1) {
+ DBG("connected to iamthif client.\n");
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ }
+}
+
+/**
+ * heci_alloc_file_private - allocates a private file structure and set it up.
+ * @file: the file structure
+ *
+ * @return The allocated file or NULL on failure
+ */
+struct heci_file_private *heci_alloc_file_private(struct file *file)
+{
+ struct heci_file_private *priv;
+
+ priv = kmalloc(sizeof(struct heci_file_private), GFP_KERNEL);
+ if (!priv)
+ return NULL;
+
+ heci_init_file_private(priv, file);
+
+ return priv;
+}
+
+
+
+/**
+ * heci_disconnect_host_client - send disconnect message to fw from host client.
+ *
+ * @dev: Device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * @return 0 on success, <0 on failure.
+ */
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int rets, err;
+ long timeout = 15; /* 15 seconds */
+ struct heci_cb_private *priv_cb;
+
+ if ((!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext->state != HECI_FILE_DISCONNECTING)
+ return 0;
+
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->file_private = file_ext;
+ priv_cb->major_file_operations = HECI_CLOSE;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (heci_disconnect(dev, file_ext)) {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ DBG("failed to call heci_disconnect.\n");
+ goto free;
+ }
+ } else {
+ DBG("add disconnect cb to control write list\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+ if (HECI_FILE_DISCONNECTED == file_ext->state) {
+ rets = 0;
+ DBG("successfully disconnected from fw client.\n");
+ } else {
+ rets = -ENODEV;
+ if (HECI_FILE_DISCONNECTED != file_ext->state)
+ DBG("wrong status client disconnect.\n");
+
+ if (err)
+ DBG("wait failed disconnect err=%08x\n", err);
+
+ DBG("failed to disconnect from fw client.\n");
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_list(&dev->ctrl_rd_list, file_ext);
+ heci_flush_list(&dev->ctrl_wr_list, file_ext);
+ spin_unlock_bh(&dev->device_lock);
+free:
+ heci_free_cb_private(priv_cb);
+ return rets;
+}
+
+/**
+ * heci_remove_client_from_file_list -
+ * remove file private data from device file list
+ *
+ * @dev: Device object for our driver
+ * @host_client_id: host client id to be removed
+ *
+ */
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (host_client_id == file_pos->host_client_id) {
+ DBG("remove host client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del_init(&file_pos->link);
+ break;
+ }
+ }
+}
diff --git a/drivers/char/heci/heci_interface.c b/drivers/char/heci/heci_interface.c
new file mode 100644
index 0000000..2527bb2
--- /dev/null
+++ b/drivers/char/heci/heci_interface.c
@@ -0,0 +1,517 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include "heci.h"
+#include "heci_interface.h"
+
+
+
+static const __u8 interface_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10};
+static const __u8 interface_stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10};
+
+/**
+ * read_heci_register - Read a byte from the heci device
+ *
+ * @device: the device structure
+ * @offset: offset from which to read the data
+ *
+ * @return the byte read.
+ */
+__u32 read_heci_register(struct iamt_heci_device *device,
+ unsigned long offset)
+{
+ return readl(device->mem_addr + offset);
+}
+
+/**
+ * write_heci_register - Write 4 bytes to the heci device
+ *
+ * @device: the device structure
+ * @offset: offset from which to write the data
+ * @value: the byte to write
+ */
+void write_heci_register(struct iamt_heci_device *device, unsigned long offset,
+ __u32 value)
+{
+ writel(value, device->mem_addr + offset);
+}
+
+
+/**
+ * heci_set_csr_register - write H_CSR register to the heci device
+ *
+ * @dev: device object for our driver
+ */
+void heci_set_csr_register(struct iamt_heci_device *dev)
+{
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+}
+
+/**
+ * heci_csr_enable_interrupts - enable heci device interrupts
+ *
+ * @dev: device object for our driver
+ */
+void heci_csr_enable_interrupts(struct iamt_heci_device *dev)
+{
+ dev->host_hw_state |= H_IE;
+ heci_set_csr_register(dev);
+}
+
+/**
+ * heci_csr_disable_interrupts - disable heci device interrupts
+ *
+ * @dev: device object for our driver
+ */
+void heci_csr_disable_interrupts(struct iamt_heci_device *dev)
+{
+ dev->host_hw_state &= ~H_IE;
+ heci_set_csr_register(dev);
+}
+
+
+/**
+ * _host_get_filled_slots - get number of device filled buffer slots
+ *
+ * @device: the device structure
+ *
+ * @return numer of filled slots
+ */
+static unsigned char _host_get_filled_slots(struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+
+ read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8);
+ write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16);
+
+ return (unsigned char) (write_ptr - read_ptr);
+}
+
+/**
+ * host_buffer_is_empty - check if host buffer is empty.
+ *
+ * @dev: device object for our driver
+ *
+ * @return 1 if empty, 0 - otherwise.
+ */
+int host_buffer_is_empty(struct iamt_heci_device *dev)
+{
+ unsigned char filled_slots;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ filled_slots = _host_get_filled_slots(dev);
+
+ if (filled_slots > 0)
+ return 0;
+
+ return 1;
+}
+
+/**
+ * count_empty_write_slots - count write empty slots.
+ *
+ * @dev: device object for our driver
+ *
+ * @return -1(ESLOTS_OVERFLOW) if overflow, otherwise empty slots count
+ */
+__s32 count_empty_write_slots(struct iamt_heci_device *dev)
+{
+ unsigned char buffer_depth, filled_slots, empty_slots;
+
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = _host_get_filled_slots(dev);
+ empty_slots = buffer_depth - filled_slots;
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ return (__s32) empty_slots;
+}
+
+/**
+ * heci_write_message - write a message to heci device.
+ *
+ * @dev: device object for our driver
+ * @heci_hdr: header of message
+ * @write_buffer: message buffer will be write
+ * @write_length: message size will be write
+ *
+ * @return 1 if success, 0 - otherwise.
+ */
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length)
+{
+ __u32 temp_msg = 0;
+ unsigned long bytes_written = 0;
+ unsigned char buffer_depth, filled_slots, empty_slots;
+ unsigned long dw_to_write;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ DBG("host_hw_state = 0x%08x.\n", dev->host_hw_state);
+ DBG("heci_write_message header=%08x.\n", *((__u32 *) header));
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = _host_get_filled_slots(dev);
+ empty_slots = buffer_depth - filled_slots;
+ DBG("filled = %hu, empty = %hu.\n", filled_slots, empty_slots);
+
+ dw_to_write = ((write_length + 3) / 4);
+
+ if (dw_to_write > empty_slots)
+ return 0;
+
+ write_heci_register(dev, H_CB_WW, *((__u32 *) header));
+
+ while (write_length >= 4) {
+ write_heci_register(dev, H_CB_WW,
+ *(__u32 *) (write_buffer + bytes_written));
+ bytes_written += 4;
+ write_length -= 4;
+ }
+
+ if (write_length > 0) {
+ memcpy(&temp_msg, &write_buffer[bytes_written], write_length);
+ write_heci_register(dev, H_CB_WW, temp_msg);
+ }
+
+ dev->host_hw_state |= H_IG;
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ if ((dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ return 0;
+
+ dev->write_hang = 0;
+ return 1;
+}
+
+/**
+ * count_full_read_slots - count read full slots.
+ *
+ * @dev: device object for our driver
+ *
+ * @return -1(ESLOTS_OVERFLOW) if overflow, otherwise filled slots count
+ */
+__s32 count_full_read_slots(struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+ unsigned char buffer_depth, filled_slots;
+
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ buffer_depth = (unsigned char)((dev->me_hw_state & ME_CBD_HRA) >> 24);
+ read_ptr = (char) ((dev->me_hw_state & ME_CBRP_HRA) >> 8);
+ write_ptr = (char) ((dev->me_hw_state & ME_CBWP_HRA) >> 16);
+ filled_slots = (unsigned char) (write_ptr - read_ptr);
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ DBG("filled_slots =%08x \n", filled_slots);
+ return (__s32) filled_slots;
+}
+
+/**
+ * heci_read_slots - read a message from heci device.
+ *
+ * @dev: device object for our driver
+ * @buffer: message buffer will be write
+ * @buffer_length: message size will be read
+ */
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length)
+{
+ __u32 i = 0;
+ unsigned char temp_buf[sizeof(__u32)];
+
+ while (buffer_length >= sizeof(__u32)) {
+ ((__u32 *) buffer)[i] = read_heci_register(dev, ME_CB_RW);
+ DBG("buffer[%d]= %d\n", i, ((__u32 *) buffer)[i]);
+ i++;
+ buffer_length -= sizeof(__u32);
+ }
+
+ if (buffer_length > 0) {
+ *((__u32 *) &temp_buf) = read_heci_register(dev, ME_CB_RW);
+ memcpy(&buffer[i * 4], temp_buf, buffer_length);
+ }
+
+ dev->host_hw_state |= H_IG;
+ heci_set_csr_register(dev);
+}
+
+/**
+ * flow_ctrl_creds - check flow_control credentials.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * @return 1 if flow_ctrl_creds >0, 0 - otherwise.
+ */
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return 0;
+
+ if (file_ext == NULL)
+ return 0;
+
+ if (file_ext->flow_ctrl_creds > 0)
+ return 1;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].flow_ctrl_creds > 0) {
+ BUG_ON(dev->me_clients[i].props.single_recv_buf
+ == 0);
+ return 1;
+ }
+ return 0;
+ }
+ }
+ BUG();
+ return 0;
+}
+
+/**
+ * flow_ctrl_reduce - reduce flow_control.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ */
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].props.single_recv_buf != 0) {
+ BUG_ON(dev->me_clients[i].flow_ctrl_creds <= 0);
+ dev->me_clients[i].flow_ctrl_creds--;
+ } else {
+ BUG_ON(file_ext->flow_ctrl_creds <= 0);
+ file_ext->flow_ctrl_creds--;
+ }
+ return;
+ }
+ }
+ BUG();
+}
+
+/**
+ * heci_send_flow_control - send flow control to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * @return 1 if success, 0 - otherwise.
+ */
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_flow_control *heci_flow_control;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_flow_control);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_flow_control = (struct hbm_flow_control *) &dev->wr_msg_buf[1];
+ memset(heci_flow_control, 0, sizeof(heci_flow_control));
+ heci_flow_control->host_addr = file_ext->host_client_id;
+ heci_flow_control->me_addr = file_ext->me_client_id;
+ heci_flow_control->cmd.cmd = HECI_FLOW_CONTROL_CMD;
+ memset(heci_flow_control->reserved, 0,
+ sizeof(heci_flow_control->reserved));
+ DBG("sending flow control host client = %d, me client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_flow_control,
+ sizeof(struct hbm_flow_control)))
+ return 0;
+
+ return 1;
+
+}
+
+/**
+ * other_client_is_connecting - check if other
+ * client with the same client id is connected.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * @return 1 if other client is connected, 0 - otherwise.
+ */
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if ((file_pos->state == HECI_FILE_CONNECTING)
+ && (file_pos != file_ext)
+ && file_ext->me_client_id == file_pos->me_client_id)
+ return 1;
+
+ }
+ return 0;
+}
+
+/**
+ * heci_send_wd - send watch dog message to fw.
+ *
+ * @dev: device object for our driver
+ *
+ * @return 1 if success, 0 - otherwise.
+ */
+int heci_send_wd(struct iamt_heci_device *dev)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = dev->wd_file_ext.host_client_id;
+ heci_hdr->me_addr = dev->wd_file_ext.me_client_id;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ if (!memcmp(dev->wd_data, interface_start_wd_params,
+ HECI_WD_PARAMS_SIZE)) {
+ heci_hdr->length = HECI_START_WD_DATA_SIZE;
+ } else {
+ BUG_ON(memcmp(dev->wd_data, interface_stop_wd_params,
+ HECI_WD_PARAMS_SIZE));
+ heci_hdr->length = HECI_WD_PARAMS_SIZE;
+ }
+
+ if (!heci_write_message(dev, heci_hdr, dev->wd_data, heci_hdr->length))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_disconnect - send disconnect message to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * @return 1 if success, 0 - otherwise.
+ */
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_disconnect_request *heci_cli_disconnect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_disconnect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_disconnect =
+ (struct hbm_client_disconnect_request *) &dev->wr_msg_buf[1];
+ memset(heci_cli_disconnect, 0, sizeof(heci_cli_disconnect));
+ heci_cli_disconnect->host_addr = file_ext->host_client_id;
+ heci_cli_disconnect->me_addr = file_ext->me_client_id;
+ heci_cli_disconnect->cmd.cmd = CLIENT_DISCONNECT_REQ_CMD;
+ heci_cli_disconnect->reserved[0] = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_disconnect,
+ sizeof(struct hbm_client_disconnect_request)))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_connect - send connect message to fw.
+ *
+ * @dev: device object for our driver
+ * @file_ext: private data of the file object
+ *
+ * @return 1 if success, 0 - otherwise.
+ */
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_request *heci_cli_connect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_connect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_connect =
+ (struct hbm_client_connect_request *) &dev->wr_msg_buf[1];
+ heci_cli_connect->host_addr = file_ext->host_client_id;
+ heci_cli_connect->me_addr = file_ext->me_client_id;
+ heci_cli_connect->cmd.cmd = CLIENT_CONNECT_REQ_CMD;
+ heci_cli_connect->reserved = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_connect,
+ sizeof(struct hbm_client_connect_request)))
+ return 0;
+
+ return 1;
+}
diff --git a/drivers/char/heci/heci_interface.h b/drivers/char/heci/heci_interface.h
new file mode 100644
index 0000000..a045853
--- /dev/null
+++ b/drivers/char/heci/heci_interface.h
@@ -0,0 +1,170 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#ifndef _HECI_INTERFACE_H_
+#define _HECI_INTERFACE_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+
+#define HBM_MINOR_VERSION 0
+#define HBM_MAJOR_VERSION 1
+#define HBM_TIMEOUT 1 /* 1 second */
+
+
+#define HOST_START_REQ_CMD 0x01
+#define HOST_START_RES_CMD 0x81
+
+#define HOST_STOP_REQ_CMD 0x02
+#define HOST_STOP_RES_CMD 0x82
+
+#define ME_STOP_REQ_CMD 0x03
+
+#define HOST_ENUM_REQ_CMD 0x04
+#define HOST_ENUM_RES_CMD 0x84
+
+#define HOST_CLIENT_PROPERTEIS_REQ_CMD 0x05
+#define HOST_CLIENT_PROPERTEIS_RES_CMD 0x85
+
+#define CLIENT_CONNECT_REQ_CMD 0x06
+#define CLIENT_CONNECT_RES_CMD 0x86
+
+#define CLIENT_DISCONNECT_REQ_CMD 0x07
+#define CLIENT_DISCONNECT_RES_CMD 0x87
+
+#define HECI_FLOW_CONTROL_CMD 0x08
+
+
+#define AMT_WD_VALUE 120 /* seconds */
+
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+
+/* IOCTL commands */
+#define IOCTL_HECI_GET_VERSION \
+ _IOWR('H' , 0x0, struct heci_message_data)
+#define IOCTL_HECI_CONNECT_CLIENT \
+ _IOWR('H' , 0x01, struct heci_message_data)
+#define IOCTL_HECI_WD \
+ _IOWR('H' , 0x02, struct heci_message_data)
+#define IOCTL_HECI_BYPASS_WD \
+ _IOWR('H' , 0x10, struct heci_message_data)
+
+enum heci_stop_reason_types{
+ DRIVER_STOP_REQUEST = 0x00,
+ DEVICE_D1_ENTRY = 0x01,
+ DEVICE_D2_ENTRY = 0x02,
+ DEVICE_D3_ENTRY = 0x03,
+ SYSTEM_S1_ENTRY = 0x04,
+ SYSTEM_S2_ENTRY = 0x05,
+ SYSTEM_S3_ENTRY = 0x06,
+ SYSTEM_S4_ENTRY = 0x07,
+ SYSTEM_S5_ENTRY = 0x08
+};
+
+enum me_stop_reason_types{
+ FW_UPDATE = 0x00
+};
+
+enum client_connect_status_types{
+ CCS_SUCCESS = 0x00,
+ CCS_NOT_FOUND = 0x01,
+ CCS_ALREADY_STARTED = 0x02,
+ CCS_OUT_OF_RESOURCES = 0x03,
+ CCS_MESSAGE_SMALL = 0x04
+};
+
+enum client_disconnect_status_types{
+ CDS_SUCCESS = 0x00
+};
+
+
+/**
+ * heci interface function prototypes
+ */
+void heci_set_csr_register(struct iamt_heci_device *dev);
+void heci_csr_enable_interrupts(struct iamt_heci_device *dev);
+void heci_csr_disable_interrupts(struct iamt_heci_device *dev);
+
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length);
+
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length);
+
+int host_buffer_is_empty(struct iamt_heci_device *dev);
+
+__s32 count_full_read_slots(struct iamt_heci_device *dev);
+
+__s32 count_empty_write_slots(struct iamt_heci_device *dev);
+
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_wd(struct iamt_heci_device *dev);
+
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+#endif /* _HECI_INTERFACE_H_ */
diff --git a/drivers/char/heci/heci_main.c b/drivers/char/heci/heci_main.c
new file mode 100644
index 0000000..ecc6031
--- /dev/null
+++ b/drivers/char/heci/heci_main.c
@@ -0,0 +1,1523 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/device.h>
+#include <linux/unistd.h>
+#include <linux/kthread.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+#define HECI_READ_TIMEOUT 45
+
+#define HECI_DRIVER_NAME "heci"
+
+/**
+ * heci driver strings
+ */
+char heci_driver_name[] = HECI_DRIVER_NAME;
+char heci_driver_string[] = "Intel(R) Management Engine Interface";
+char heci_driver_version[] = HECI_DRIVER_VERSION;
+char heci_copyright[] = "Copyright (c) 2003 - 2008 Intel Corporation.";
+
+
+#ifdef HECI_DEBUG
+int heci_debug = 1;
+#else
+int heci_debug;
+#endif
+MODULE_PARM_DESC(heci_debug, "Debug enabled or not");
+module_param(heci_debug, int, 0644);
+
+
+#define HECI_DEV_NAME "heci"
+
+/* heci char device for registration */
+static struct cdev heci_cdev;
+
+/* major number for device */
+static int heci_major;
+/* The device pointer */
+static struct pci_dev *heci_device;
+
+struct class *heci_class;
+struct class_device *heci_class_dev;
+
+
+/* heci_pci_tbl - PCI Device ID Table */
+static struct pci_device_id heci_pci_tbl[] = {
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82946GZ)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82Q965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82G965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GM965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_82GME965)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q35)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82G33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82Q33)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_82X38)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_3200)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_6)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_7)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_8)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_9)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9_10)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH9M_4)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_1)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_2)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_3)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, HECI_DEV_ID_ICH10_4)},
+ /* required last entry */
+ {0, }
+};
+
+MODULE_DEVICE_TABLE(pci, heci_pci_tbl);
+
+/**
+ * Local Function Prototypes
+ */
+static int __init heci_init_module(void);
+static void __exit heci_exit_module(void);
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent);
+static void __devexit heci_remove(struct pci_dev *pdev);
+static int heci_open(struct inode *inode, struct file *file);
+static int heci_release(struct inode *inode, struct file *file);
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset);
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data);
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset);
+static unsigned int heci_poll(struct file *file, poll_table *wait);
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state);
+static int heci_resume(struct pci_dev *pdev);
+static __u16 g_sus_wd_timeout;
+#else
+#define heci_suspend NULL
+#define heci_resume NULL
+#endif
+/**
+ * PCI driver structure
+ */
+static struct pci_driver heci_driver = {
+ .name = heci_driver_name,
+ .id_table = heci_pci_tbl,
+ .probe = heci_probe,
+ .remove = __devexit_p(heci_remove),
+ .shutdown = __devexit_p(heci_remove),
+ .suspend = heci_suspend,
+ .resume = heci_resume
+};
+
+/**
+ * file operations structure will be use heci char device.
+ */
+static struct file_operations heci_fops = {
+ .owner = THIS_MODULE,
+ .read = heci_read,
+ .ioctl = heci_ioctl,
+ .open = heci_open,
+ .release = heci_release,
+ .write = heci_write,
+ .poll = heci_poll,
+};
+
+/**
+ * Set up the cdev structure for heci device.
+ *
+ * @dev: char device struct
+ * @hminor: minor number for registration char device
+ * @fops: file operations structure
+ *
+ * @return 0 on success, <0 on failure.
+ */
+static int heci_registration_cdev(struct cdev *dev, int hminor,
+ struct file_operations *fops)
+{
+ int ret, devno = MKDEV(heci_major, hminor);
+
+ cdev_init(dev, fops);
+ dev->owner = THIS_MODULE;
+ ret = cdev_add(dev, devno, 1);
+ /* Fail gracefully if need be */
+ if (ret) {
+ printk(KERN_ERR "heci: Error %d registering heci device %d\n",
+ ret, hminor);
+ }
+ return ret;
+}
+
+/* Display the version of heci driver. */
+static ssize_t version_show(struct class *dev, char *buf)
+{
+ return sprintf(buf, "%s %s.\n",
+ heci_driver_string, heci_driver_version);
+}
+
+static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
+
+/**
+ * heci_register_cdev - registers heci char device
+ *
+ * @return 0 on success, <0 on failure.
+ */
+static int heci_register_cdev(void)
+{
+ int ret;
+ dev_t dev;
+
+ /* registration of char devices */
+ ret = alloc_chrdev_region(&dev, HECI_MINORS_BASE, HECI_MINORS_COUNT,
+ HECI_DRIVER_NAME);
+ if (ret) {
+ printk(KERN_ERR "heci: Error allocating char device region.\n");
+ return ret;
+ }
+
+ heci_major = MAJOR(dev);
+
+ ret = heci_registration_cdev(&heci_cdev, HECI_MINOR_NUMBER,
+ &heci_fops);
+ if (ret)
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+
+ return ret;
+}
+
+/**
+ * heci_unregister_cdev - unregisters heci char device
+ */
+static void heci_unregister_cdev(void)
+{
+ cdev_del(&heci_cdev);
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+}
+
+/**
+ * heci_sysfs_device_create - adds device entry to sysfs
+ *
+ * @return 0 on success, <0 on failure.
+ */
+static int heci_sysfs_device_create(void)
+{
+ struct class *class;
+ void *tmphdev;
+ int err = 0;
+
+ class = class_create(THIS_MODULE, HECI_DRIVER_NAME);
+ if (IS_ERR(class)) {
+ err = PTR_ERR(class);
+ printk(KERN_ERR "heci: Error creating heci class.\n");
+ goto err_out;
+ }
+
+ err = class_create_file(class, &class_attr_version);
+ if (err) {
+ class_destroy(class);
+ printk(KERN_ERR "heci: Error creating heci class file.\n");
+ goto err_out;
+ }
+
+ tmphdev = (void *) device_create(class, NULL, heci_cdev.dev,
+ HECI_DEV_NAME);
+ if (IS_ERR(tmphdev)) {
+ err = PTR_ERR(tmphdev);
+ class_remove_file(class, &class_attr_version);
+ class_destroy(class);
+ goto err_out;
+ }
+
+ heci_class = class;
+err_out:
+ return err;
+}
+
+/**
+ * heci_sysfs_device_remove - unregisters the device entry on sysfs
+ */
+static void heci_sysfs_device_remove(void)
+{
+ if ((heci_class == NULL) || (IS_ERR(heci_class)))
+ return;
+
+ device_destroy(heci_class, heci_cdev.dev);
+ class_remove_file(heci_class, &class_attr_version);
+ class_destroy(heci_class);
+}
+
+/**
+ * heci_init_module - Driver Registration Routine
+ *
+ * heci_init_module is the first routine called when the driver is
+ * loaded. All it does is register with the PCI subsystem.
+ *
+ * @return 0 on success, <0 on failure.
+ */
+static int __init heci_init_module(void)
+{
+ int ret = 0;
+
+ printk(KERN_INFO "heci: %s - version %s\n", heci_driver_string,
+ heci_driver_version);
+ printk(KERN_INFO "heci: %s\n", heci_copyright);
+
+ /* init pci module */
+ ret = pci_register_driver(&heci_driver);
+ if (ret < 0) {
+ printk(KERN_ERR "heci: Error registering driver.\n");
+ goto end;
+ }
+
+ ret = heci_register_cdev();
+ if (ret)
+ goto unregister_pci;
+
+ ret = heci_sysfs_device_create();
+ if (ret)
+ goto unregister_cdev;
+
+ return ret;
+
+unregister_cdev:
+ heci_unregister_cdev();
+unregister_pci:
+ pci_unregister_driver(&heci_driver);
+end:
+ return ret;
+}
+
+module_init(heci_init_module);
+
+
+/**
+ * heci_exit_module - Driver Exit Cleanup Routine
+ *
+ * heci_exit_module is called just before the driver is removed
+ * from memory.
+ */
+static void __exit heci_exit_module(void)
+{
+ pci_unregister_driver(&heci_driver);
+ heci_sysfs_device_remove();
+ heci_unregister_cdev();
+}
+
+module_exit(heci_exit_module);
+
+
+/**
+ * heci_probe - Device Initialization Routine
+ *
+ * @pdev: PCI device information struct
+ * @ent: entry in kcs_pci_tbl
+ *
+ * @return 0 on success, <0 on failure.
+ */
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct iamt_heci_device *dev = NULL;
+ int i, err = 0;
+
+ if (heci_device) {
+ err = -EEXIST;
+ goto end;
+ }
+ /* enable pci dev */
+ err = pci_enable_device(pdev);
+ if (err) {
+ printk(KERN_ERR "heci: Failed to enable pci device.\n");
+ goto end;
+ }
+ /* set PCI host mastering */
+ pci_set_master(pdev);
+ /* pci request regions for heci driver */
+ err = pci_request_regions(pdev, heci_driver_name);
+ if (err) {
+ printk(KERN_ERR "heci: Failed to get pci regions.\n");
+ goto disable_device;
+ }
+ /* allocates and initializes the heci dev structure */
+ dev = init_heci_device(pdev);
+ if (!dev) {
+ err = -ENOMEM;
+ goto release_regions;
+ }
+ /* mapping IO device memory */
+ for (i = 0; i <= 5; i++) {
+ if (pci_resource_len(pdev, i) == 0)
+ continue;
+ if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
+ printk(KERN_ERR "heci has IO ports.\n");
+ goto free_device;
+ } else if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
+ if (dev->mem_base) {
+ printk(KERN_ERR
+ "heci: Too many mem addresses.\n");
+ goto free_device;
+ }
+ dev->mem_base = pci_resource_start(pdev, i);
+ dev->mem_length = pci_resource_len(pdev, i);
+ }
+ }
+ if (!dev->mem_base) {
+ printk(KERN_ERR "heci: No address to use.\n");
+ err = -ENODEV;
+ goto free_device;
+ }
+ dev->mem_addr = ioremap_nocache(dev->mem_base,
+ dev->mem_length);
+ if (!dev->mem_addr) {
+ printk(KERN_ERR "heci: Remap IO device memory failure.\n");
+ err = -ENOMEM;
+ goto free_device;
+ }
+ /* request and enable interrupt */
+ err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, dev);
+ if (err) {
+ printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
+ pdev->irq);
+ goto unmap_memory;
+ }
+
+ if (heci_hw_init(dev)) {
+ printk(KERN_ERR "heci: Init hw failure.\n");
+ err = -ENODEV;
+ goto release_irq;
+ }
+ init_timer(&dev->wd_timer);
+
+ heci_initialize_clients(dev);
+ if (dev->heci_state != HECI_ENABLED) {
+ err = -ENODEV;
+ goto release_hw;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ heci_device = pdev;
+ pci_set_drvdata(pdev, dev);
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->wd_timeout)
+ mod_timer(&dev->wd_timer, jiffies);
+
+#ifdef CONFIG_PM
+ g_sus_wd_timeout = 0;
+#endif
+ printk(KERN_INFO "heci driver initialization successful.\n");
+ return 0;
+
+release_hw:
+ /* disable interrupts */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ heci_csr_disable_interrupts(dev);
+
+ del_timer_sync(&dev->wd_timer);
+
+ flush_scheduled_work();
+
+release_irq:
+ free_irq(pdev->irq, dev);
+unmap_memory:
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+free_device:
+ kfree(dev);
+release_regions:
+ pci_release_regions(pdev);
+disable_device:
+ pci_disable_device(pdev);
+end:
+ printk(KERN_ERR "heci driver initialization failed.\n");
+ return err;
+}
+
+/**
+ * heci_remove - Device Removal Routine
+ *
+ * @pdev: PCI device information struct
+ *
+ * heci_remove is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.
+ */
+static void __devexit heci_remove(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *dev = pci_get_drvdata(pdev);
+
+ if (heci_device != pdev)
+ return;
+
+ if (dev == NULL)
+ return;
+
+ spin_lock_bh(&dev->device_lock);
+ if (heci_device != pdev) {
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+
+ del_timer_sync(&dev->wd_timer);
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
+ && dev->wd_timeout) {
+ dev->wd_timeout = 0;
+ dev->wd_due_counter = 0;
+ memcpy(dev->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
+ dev->stop = 1;
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+
+ if (!heci_send_wd(dev))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+ } else {
+ dev->wd_pending = 1;
+ }
+ dev->wd_stoped = 0;
+ spin_unlock_bh(&dev->device_lock);
+
+ wait_event_interruptible_timeout(dev->wait_stop_wd,
+ (dev->wd_stoped), 10 * HZ);
+ spin_lock_bh(&dev->device_lock);
+ if (!dev->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else
+ DBG("stop wd complete.\n");
+
+ }
+
+ heci_device = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->iamthif_file_ext.state == HECI_FILE_CONNECTED) {
+ dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->iamthif_file_ext);
+ }
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED) {
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->wd_file_ext);
+ }
+
+ spin_lock_bh(&dev->device_lock);
+
+ /* remove entry if already in list */
+ DBG("list del iamthif and wd file list.\n");
+ heci_remove_client_from_file_list(dev, dev->wd_file_ext.
+ host_client_id);
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+
+ dev->iamthif_current_cb = NULL;
+ dev->iamthif_file_ext.file = NULL;
+ dev->num_heci_me_clients = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ flush_scheduled_work();
+
+ /* disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ free_irq(pdev->irq, dev);
+ pci_set_drvdata(pdev, NULL);
+
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+
+ kfree(dev);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+}
+
+/**
+ * heci_clear_list - remove all callbacks associated with file
+ * from heci_cb_list
+ *
+ * @file: file information struct
+ * @heci_cb_list: callbacks list
+ *
+ * heci_clear_list is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * @return 1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_list(struct iamt_heci_device *dev,
+ struct file *file, struct list_head *heci_cb_list)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private*priv_cb_next = NULL;
+ struct file *file_temp;
+ int rets = 0;
+
+ /* list all list member */
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ heci_cb_list, cb_list) {
+ file_temp = (struct file *)priv_cb_pos->file_object;
+ /* check if list member associated with a file */
+ if (file_temp == file) {
+ /* remove member from the list */
+ list_del(&priv_cb_pos->cb_list);
+ /* check if cb equal to current iamthif cb */
+ if (dev->iamthif_current_cb == priv_cb_pos) {
+ dev->iamthif_current_cb = NULL;
+ /* send flow control to iamthif client */
+ heci_send_flow_control(dev,
+ &dev->iamthif_file_ext);
+ }
+ /* free all allocated buffers */
+ heci_free_cb_private(priv_cb_pos);
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_clear_lists - remove all callbacks associated with file
+ *
+ * @dev: device information struct
+ * @file: file information struct
+ *
+ * heci_clear_lists is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * @return 1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_lists(struct iamt_heci_device *dev, struct file *file)
+{
+ int rets = 0;
+
+ /* remove callbacks associated with a file */
+ heci_clear_list(dev, file, &dev->pthi_cmd_list.heci_cb.cb_list);
+ if (heci_clear_list(dev, file,
+ &dev->pthi_read_complete_list.heci_cb.cb_list))
+ rets = 1;
+
+ heci_clear_list(dev, file, &dev->ctrl_rd_list.heci_cb.cb_list);
+
+ if (heci_clear_list(dev, file, &dev->ctrl_wr_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file,
+ &dev->write_waiting_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file, &dev->write_list.heci_cb.cb_list))
+ rets = 1;
+
+ /* check if iamthif_current_cb not NULL */
+ if (dev->iamthif_current_cb && (!rets)) {
+ /* check file and iamthif current cb association */
+ if (dev->iamthif_current_cb->file_object == file) {
+ /* remove cb */
+ heci_free_cb_private(dev->iamthif_current_cb);
+ dev->iamthif_current_cb = NULL;
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_open - the open function
+ */
+static int heci_open(struct inode *inode, struct file *file)
+{
+ struct heci_file_private *file_ext;
+ int if_num = iminor(inode);
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ file_ext = heci_alloc_file_private(file);
+ if (file_ext == NULL)
+ return -ENOMEM;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENODEV;
+ }
+ if (dev->open_handle_count >= HECI_MAX_OPEN_HANDLE_COUNT) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENFILE;
+ };
+ dev->open_handle_count++;
+ list_add_tail(&file_ext->link, &dev->file_list);
+ while ((dev->heci_host_clients[dev->current_host_client_id / 8]
+ & (1 << (dev->current_host_client_id % 8))) != 0) {
+
+ dev->current_host_client_id++; /* allow overflow */
+ DBG("current_host_client_id = %d\n",
+ dev->current_host_client_id);
+ DBG("dev->open_handle_count = %lu\n",
+ dev->open_handle_count);
+ }
+ DBG("current_host_client_id = %d\n", dev->current_host_client_id);
+ file_ext->host_client_id = dev->current_host_client_id;
+ dev->heci_host_clients[file_ext->host_client_id / 8] |=
+ (1 << (file_ext->host_client_id % 8));
+ spin_unlock_bh(&dev->device_lock);
+ spin_lock(&file_ext->file_lock);
+ file_ext->state = HECI_FILE_INITIALIZING;
+ file_ext->sm_state = 0;
+
+ file->private_data = file_ext;
+ spin_unlock(&file_ext->file_lock);
+
+ return 0;
+}
+
+/**
+ * heci_release - the release function
+ */
+static int heci_release(struct inode *inode, struct file *file)
+{
+ int rets = 0;
+ int if_num = iminor(inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext != &dev->iamthif_file_ext) {
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state == HECI_FILE_CONNECTED) {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ spin_unlock(&file_ext->file_lock);
+ DBG("disconnecting client host client = %d, "
+ "ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+ rets = heci_disconnect_host_client(dev, file_ext);
+ spin_lock(&file_ext->file_lock);
+ }
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_queues(dev, file_ext);
+ DBG("remove client host client = %d, ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ if (dev->open_handle_count > 0) {
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ dev->open_handle_count--;
+ }
+ heci_remove_client_from_file_list(dev,
+ file_ext->host_client_id);
+
+ /* free read cb */
+ if (file_ext->read_cb != NULL) {
+ priv_cb = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb != NULL)
+ list_del(&priv_cb->cb_list);
+
+ priv_cb = file_ext->read_cb;
+ file_ext->read_cb = NULL;
+ }
+
+ spin_unlock_bh(&dev->device_lock);
+ file->private_data = NULL;
+ spin_unlock(&file_ext->file_lock);
+
+ if (priv_cb != NULL)
+ heci_free_cb_private(priv_cb);
+
+ kfree(file_ext);
+ } else {
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->open_handle_count > 0)
+ dev->open_handle_count--;
+
+ if (dev->iamthif_file_object == file
+ && dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi canceled iamthif state %d\n",
+ dev->iamthif_state);
+ dev->iamthif_canceled = 1;
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE) {
+ DBG("run next pthi iamthif cb\n");
+ run_next_iamthif_cmd(dev);
+ }
+ }
+
+ if (heci_clear_lists(dev, file))
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+
+ spin_unlock_bh(&dev->device_lock);
+ }
+ return rets;
+}
+
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ struct heci_file_private *file_ext_list_temp;
+
+ if (dev->read_list.status == 0
+ && !list_empty(&dev->read_list.heci_cb.cb_list)) {
+ DBG("remove read_list CB \n");
+ list_for_each_entry_safe(priv_cb_pos,
+ priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+
+ file_ext_list_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext_list_temp != NULL) &&
+ heci_fe_same_id(file_ext, file_ext_list_temp))
+ return priv_cb_pos;
+
+ }
+ }
+ return NULL;
+}
+
+/**
+ * heci_read - the read client message function.
+ */
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int i;
+ int rets = 0, err = 0;
+ int if_num = iminor(file->f_dentry->d_inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ spin_lock(&file_ext->file_lock);
+ if ((file_ext->sm_state & HECI_WD_STATE_INDEPENDENCE_MSG_SENT) == 0) {
+ spin_unlock(&file_ext->file_lock);
+ /* Do not allow to read watchdog client */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_wd_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (file_ext->me_client_id ==
+ dev->me_clients[i].client_id)
+ return -EBADF;
+ }
+ }
+ } else {
+ file_ext->sm_state &= ~HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+ }
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ rets = pthi_read(dev, if_num, file, ubuf, length, offset);
+ goto out;
+ }
+
+ if (file_ext->read_cb && file_ext->read_cb->information > *offset) {
+ priv_cb = file_ext->read_cb;
+ goto copy_buffer;
+ } else if (file_ext->read_cb && file_ext->read_cb->information > 0 &&
+ file_ext->read_cb->information <= *offset) {
+ priv_cb = file_ext->read_cb;
+ rets = 0;
+ goto free;
+ } else if ((!file_ext->read_cb || file_ext->read_cb->information == 0)
+ && *offset > 0) {
+ /*Offset needs to be cleaned for contingous reads*/
+ *offset = 0;
+ rets = 0;
+ goto out;
+ }
+
+ spin_lock(&file_ext->read_io_lock);
+ err = heci_start_read(dev, if_num, file_ext);
+ if (err != 0 && err != -EBUSY) {
+ DBG("heci start read failure with status = %d\n", err);
+ spin_unlock(&file_ext->read_io_lock);
+ rets = err;
+ goto out;
+ }
+ if (HECI_READ_COMPLETE != file_ext->reading_state
+ && !waitqueue_active(&file_ext->rx_wait)) {
+ if (file->f_flags & O_NONBLOCK) {
+ rets = -EAGAIN;
+ spin_unlock(&file_ext->read_io_lock);
+ goto out;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+
+ if (wait_event_interruptible(file_ext->rx_wait,
+ (HECI_READ_COMPLETE == file_ext->reading_state
+ || HECI_FILE_INITIALIZING == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTING == file_ext->state))) {
+ if (signal_pending(current)) {
+ rets = -EINTR;
+ goto out;
+ }
+ return -ERESTARTSYS;
+ }
+
+ if (HECI_FILE_INITIALIZING == file_ext->state ||
+ HECI_FILE_DISCONNECTED == file_ext->state ||
+ HECI_FILE_DISCONNECTING == file_ext->state) {
+ rets = -EBUSY;
+ goto out;
+ }
+ spin_lock(&file_ext->read_io_lock);
+ }
+
+ priv_cb = file_ext->read_cb;
+
+ if (!priv_cb) {
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENODEV;
+ }
+ if (file_ext->reading_state != HECI_READ_COMPLETE) {
+ spin_unlock(&file_ext->read_io_lock);
+ return 0;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+ /* now copy the data to user space */
+copy_buffer:
+ DBG("priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("priv_cb->information - %lu\n",
+ priv_cb->information);
+ if (length == 0 || ubuf == NULL ||
+ *offset > priv_cb->information) {
+ rets = -EMSGSIZE;
+ goto free;
+ }
+
+ /* length is being turncated to PAGE_SIZE, however, */
+ /* information size may be longer */
+ length = (length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset));
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length)) {
+ rets = -EFAULT;
+ goto free;
+ }
+
+ rets = length;
+ *offset += length;
+ if ((unsigned long)*offset < priv_cb->information)
+ goto out;
+
+free:
+ spin_lock_bh(&dev->device_lock);
+ priv_cb_pos = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb_pos != NULL)
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_cb);
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+out: DBG("end heci read rets= %d\n", rets);
+ return rets;
+}
+
+/**
+ * heci_write - the write function.
+ */
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int rets = 0;
+ __u8 i;
+ int if_num = iminor(file->f_dentry->d_inode);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_write_cb = NULL;
+ struct heci_msg_hdr heci_hdr;
+ struct iamt_heci_device *dev;
+ unsigned long currtime = get_seconds();
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb = find_pthi_read_list_entry(dev, file);
+ if ((priv_write_cb != NULL) &&
+ (((currtime - priv_write_cb->read_time) >
+ IAMTHIF_READ_TIMER) ||
+ (file_ext->reading_state == HECI_READ_COMPLETE))) {
+ (*offset) = 0;
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ priv_write_cb = NULL;
+ }
+ }
+
+ /* free entry used in read */
+ if (file_ext->reading_state == HECI_READ_COMPLETE) {
+ *offset = 0;
+ priv_write_cb = find_read_list_entry(dev, file_ext);
+ if (priv_write_cb != NULL) {
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ priv_write_cb = NULL;
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+ }
+ } else if (file_ext->reading_state == HECI_IDLE &&
+ file_ext->read_pending == 0)
+ (*offset) = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ priv_write_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_write_cb)
+ return -ENOMEM;
+
+ priv_write_cb->file_object = file;
+ priv_write_cb->file_private = file_ext;
+ priv_write_cb->request_buffer.data = kmalloc(length, GFP_KERNEL);
+ if (!priv_write_cb->request_buffer.data) {
+ kfree(priv_write_cb);
+ return -ENOMEM;
+ }
+ DBG("length =%d\n", (int) length);
+
+ if (copy_from_user(priv_write_cb->request_buffer.data,
+ ubuf, length)) {
+ rets = -EFAULT;
+ goto fail;
+ }
+
+ spin_lock(&file_ext->file_lock);
+ file_ext->sm_state = 0;
+ if ((length == 4) &&
+ ((memcmp(heci_wd_state_independence_msg[0], ubuf, 4) == 0) ||
+ (memcmp(heci_wd_state_independence_msg[1], ubuf, 4) == 0) ||
+ (memcmp(heci_wd_state_independence_msg[2], ubuf, 4) == 0)))
+ file_ext->sm_state |= HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+
+ INIT_LIST_HEAD(&priv_write_cb->cb_list);
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb->response_buffer.data =
+ kmalloc(IAMTHIF_MTU, GFP_KERNEL);
+ if (!priv_write_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->iamthif_file_ext.me_client_id)
+ break;
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients) ||
+ (dev->me_clients[i].client_id !=
+ dev->iamthif_file_ext.me_client_id)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ } else if ((length > dev->me_clients[i].props.max_msg_length)
+ || (length <= 0)) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -EMSGSIZE;
+ goto fail;
+ }
+
+
+ priv_write_cb->response_buffer.size = IAMTHIF_MTU;
+ priv_write_cb->major_file_operations = HECI_IOCTL;
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+
+ if (!list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)
+ || dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi_state = %d\n", (int) dev->iamthif_state);
+ DBG("add PTHI cb to pthi cmd waiting list\n");
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->pthi_cmd_list.heci_cb.cb_list);
+ rets = length;
+ } else {
+ DBG("call pthi write\n");
+ rets = pthi_write(dev, priv_write_cb);
+
+ if (rets != 0) {
+ DBG("pthi write failed with status = %d\n",
+ rets);
+ spin_unlock_bh(&dev->device_lock);
+ goto fail;
+ }
+ rets = length;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+ }
+
+ priv_write_cb->major_file_operations = HECI_WRITE;
+ /* make sure information is zero before we start */
+
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+
+ spin_lock(&file_ext->write_io_lock);
+ DBG("host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (file_ext->state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ DBG("host client = %d, is not connected to ME client = %d",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ goto unlock;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ file_ext->me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if (i == dev->num_heci_me_clients) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+ if (length > dev->me_clients[i].props.max_msg_length || length <= 0) {
+ rets = -EINVAL;
+ goto unlock;
+ }
+ priv_write_cb->file_private = file_ext;
+
+ spin_lock_bh(&dev->device_lock);
+ if (flow_ctrl_creds(dev, file_ext) &&
+ dev->host_buffer_is_empty) {
+ spin_unlock_bh(&dev->device_lock);
+ dev->host_buffer_is_empty = 0;
+ if (length > ((((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr))) {
+
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) -
+ sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = length;
+ heci_hdr.msg_complete = 1;
+ }
+ heci_hdr.host_addr = file_ext->host_client_id;
+ heci_hdr.me_addr = file_ext->me_client_id;
+ heci_hdr.reserved = 0;
+ DBG("call heci_write_message header=%08x.\n",
+ *((__u32 *) &heci_hdr));
+ spin_unlock(&file_ext->write_io_lock);
+ /* protect heci low level write */
+ spin_lock_bh(&dev->device_lock);
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *) (priv_write_cb->request_buffer.data),
+ heci_hdr.length)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_write_cb);
+ rets = -ENODEV;
+ priv_write_cb->information = 0;
+ return rets;
+ }
+ file_ext->writing_state = HECI_WRITING;
+ priv_write_cb->information = heci_hdr.length;
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, file_ext);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ } else {
+
+ spin_unlock_bh(&dev->device_lock);
+ priv_write_cb->information = 0;
+ file_ext->writing_state = HECI_WRITING;
+ spin_unlock(&file_ext->write_io_lock);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return length;
+
+unlock:
+ spin_unlock(&file_ext->write_io_lock);
+fail:
+ heci_free_cb_private(priv_write_cb);
+ return rets;
+
+}
+
+/**
+ * heci_ioctl - the IOCTL function
+ */
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data)
+{
+ int rets = 0;
+ int if_num = iminor(inode);
+ struct heci_file_private *file_ext = file->private_data;
+ /* in user space */
+ struct heci_message_data *u_msg = (struct heci_message_data *) data;
+ struct heci_message_data k_msg; /* all in kernel on the stack */
+ struct iamt_heci_device *dev;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ /* first copy from user all data needed */
+ if (copy_from_user(&k_msg, u_msg, sizeof(k_msg))) {
+ DBG("first copy from user all data needed filled\n");
+ return -EFAULT;
+ }
+ DBG("user message size is %d\n", k_msg.size);
+
+ switch (cmd) {
+ case IOCTL_HECI_GET_VERSION:
+ DBG(": IOCTL_HECI_GET_VERSION\n");
+ rets = heci_ioctl_get_version(dev, if_num, u_msg, k_msg,
+ file_ext);
+ break;
+
+ case IOCTL_HECI_CONNECT_CLIENT:
+ DBG(": IOCTL_HECI_CONNECT_CLIENT.\n");
+ rets = heci_ioctl_connect_client(dev, if_num, u_msg, k_msg,
+ file);
+ break;
+
+ case IOCTL_HECI_WD:
+ DBG(": IOCTL_HECI_WD.\n");
+ rets = heci_ioctl_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ case IOCTL_HECI_BYPASS_WD:
+ DBG(": IOCTL_HECI_BYPASS_WD.\n");
+ rets = heci_ioctl_bypass_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ default:
+ rets = -EINVAL;
+ break;
+ }
+ return rets;
+}
+
+/**
+ * heci_poll - the poll function
+ */
+static unsigned int heci_poll(struct file *file, poll_table *wait)
+{
+ int if_num = iminor(file->f_dentry->d_inode);
+ unsigned int mask = 0;
+ struct heci_file_private *file_ext = file->private_data;
+ struct iamt_heci_device *dev;
+
+ if (!heci_device)
+ return mask;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return mask;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return mask;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ poll_wait(file, &dev->iamthif_file_ext.wait, wait);
+ spin_lock(&dev->iamthif_file_ext.file_lock);
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE
+ && dev->iamthif_file_object == file) {
+ mask |= (POLLIN | POLLRDNORM);
+ spin_lock_bh(&dev->device_lock);
+ DBG("run next pthi cb\n");
+ run_next_iamthif_cmd(dev);
+ spin_unlock_bh(&dev->device_lock);
+ }
+ spin_unlock(&dev->iamthif_file_ext.file_lock);
+
+ } else{
+ poll_wait(file, &file_ext->tx_wait, wait);
+ spin_lock(&file_ext->write_io_lock);
+ if (HECI_WRITE_COMPLETE == file_ext->writing_state)
+ mask |= (POLLIN | POLLRDNORM);
+
+ spin_unlock(&file_ext->write_io_lock);
+ }
+
+ return mask;
+}
+
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct iamt_heci_device *device = pci_get_drvdata(pdev);
+ int err = 0;
+
+ spin_lock_bh(&device->device_lock);
+ if (device->reinit_tsk != NULL) {
+ kthread_stop(device->reinit_tsk);
+ device->reinit_tsk = NULL;
+ }
+ spin_unlock_bh(&device->device_lock);
+
+ /* Stop watchdog if exists */
+ del_timer_sync(&device->wd_timer);
+ if (device->wd_file_ext.state == HECI_FILE_CONNECTED
+ && device->wd_timeout) {
+ spin_lock_bh(&device->device_lock);
+ g_sus_wd_timeout = device->wd_timeout;
+ device->wd_timeout = 0;
+ device->wd_due_counter = 0;
+ memcpy(device->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
+ device->stop = 1;
+ if (device->host_buffer_is_empty &&
+ flow_ctrl_creds(device, &device->wd_file_ext)) {
+ device->host_buffer_is_empty = 0;
+ if (!heci_send_wd(device))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(device, &device->wd_file_ext);
+
+ device->wd_pending = 0;
+ } else {
+ device->wd_pending = 1;
+ }
+ spin_unlock_bh(&device->device_lock);
+ device->wd_stoped = 0;
+
+ err = wait_event_interruptible_timeout(device->wait_stop_wd,
+ (device->wd_stoped),
+ 10 * HZ);
+ if (!device->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else {
+ DBG("stop wd complete %d.\n", err);
+ err = 0;
+ }
+ }
+ /* Set new heci state */
+ spin_lock_bh(&device->device_lock);
+ if (device->heci_state == HECI_ENABLED ||
+ device->heci_state == HECI_RECOVERING_FROM_RESET) {
+ device->heci_state = HECI_POWER_DOWN;
+ heci_reset(device, 0);
+ }
+ spin_unlock_bh(&device->device_lock);
+
+ pci_save_state(pdev);
+
+ pci_disable_device(pdev);
+ free_irq(pdev->irq, device);
+
+ pci_set_power_state(pdev, PCI_D3hot);
+
+ return err;
+}
+
+static int heci_resume(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *device;
+ int err = 0;
+
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+
+ device = pci_get_drvdata(pdev);
+ if (!device)
+ return -ENODEV;
+
+ /* request and enable interrupt */
+ err = request_irq(pdev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, device);
+ if (err) {
+ printk(KERN_ERR "heci: Request_irq failure. irq = %d \n",
+ pdev->irq);
+ return err;
+ }
+
+ spin_lock_bh(&device->device_lock);
+ device->heci_state = HECI_POWER_UP;
+ heci_reset(device, 1);
+ spin_unlock_bh(&device->device_lock);
+
+ /* Start watchdog if stopped in suspend */
+ if (g_sus_wd_timeout != 0) {
+ device->wd_timeout = g_sus_wd_timeout;
+
+ memcpy(device->wd_data, start_wd_params, HECI_WD_PARAMS_SIZE);
+ memcpy(device->wd_data + HECI_WD_PARAMS_SIZE,
+ &device->wd_timeout, sizeof(__u16));
+ device->wd_due_counter = 1;
+
+ if (device->wd_timeout)
+ mod_timer(&device->wd_timer, jiffies);
+
+ g_sus_wd_timeout = 0;
+ }
+ return err;
+}
+#endif
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(HECI_DRIVER_VERSION);
diff --git a/drivers/char/heci/heci_version.h b/drivers/char/heci/heci_version.h
new file mode 100644
index 0000000..797e84e
--- /dev/null
+++ b/drivers/char/heci/heci_version.h
@@ -0,0 +1,54 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef HECI_VERSION_H
+#define HECI_VERSION_H
+
+#define MAJOR_VERSION 5
+#define MINOR_VERSION 0
+#define QUICK_FIX_NUMBER 0
+#define VER_BUILD 30
+
+#define HECI_DRV_VER1 __stringify(MAJOR_VERSION) "." __stringify(MINOR_VERSION)
+#define HECI_DRV_VER2 __stringify(QUICK_FIX_NUMBER) "." __stringify(VER_BUILD)
+
+#define HECI_DRIVER_VERSION HECI_DRV_VER1 "." HECI_DRV_VER2
+
+#endif
diff --git a/drivers/char/heci/interrupt.c b/drivers/char/heci/interrupt.c
new file mode 100644
index 0000000..b41e8d3
--- /dev/null
+++ b/drivers/char/heci/interrupt.c
@@ -0,0 +1,1552 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/kthread.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+
+/**
+ * interrupt function prototypes
+ */
+static void heci_bh_handler(struct work_struct *work);
+static int heci_bh_read_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static int heci_bh_write_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *connect_res);
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *disconnect_res);
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control);
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req);
+
+
+/**
+ * heci_isr_interrupt - The ISR of the HECI device
+ *
+ * @irq: The irq number
+ * @dev_id: pointer to the device structure
+ *
+ * @return irqreturn_t
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id)
+{
+ int err;
+ struct iamt_heci_device *device = (struct iamt_heci_device *) dev_id;
+
+ device->host_hw_state = read_heci_register(device, H_CSR);
+
+ if ((device->host_hw_state & H_IS) != H_IS)
+ return IRQ_NONE;
+
+ /* disable interrupts */
+ heci_csr_disable_interrupts(device);
+
+ /**
+ * Our device interrupted, schedule work the heci_bh_handler
+ * to handle the interrupt processing. This needs to be a
+ * workqueue item since the handler can sleep.
+ */
+ PREPARE_WORK(&device->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler.\n");
+ err = schedule_work(&device->work);
+ if (!err) {
+ printk(KERN_ERR "heci: schedule the heci_bh_handler"
+ " failed error=%x\n", err);
+ }
+ return IRQ_HANDLED;
+}
+
+/**
+ * _heci_cmpl: process completed operation.
+ *
+ * @file_ext: private data of the file object.
+ * @priv_cb_pos: callback block.
+ */
+static void _heci_cmpl(struct heci_file_private *file_ext,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (priv_cb_pos->major_file_operations == HECI_WRITE) {
+ heci_free_cb_private(priv_cb_pos);
+ DBG("completing write call back.\n");
+ file_ext->writing_state = HECI_WRITE_COMPLETE;
+ if ((&file_ext->tx_wait) &&
+ waitqueue_active(&file_ext->tx_wait))
+ wake_up_interruptible(&file_ext->tx_wait);
+
+ } else if (priv_cb_pos->major_file_operations == HECI_READ
+ && HECI_READING == file_ext->reading_state) {
+ DBG("completing read call back information= %lu\n",
+ priv_cb_pos->information);
+ file_ext->reading_state = HECI_READ_COMPLETE;
+ if ((&file_ext->rx_wait) &&
+ waitqueue_active(&file_ext->rx_wait))
+ wake_up_interruptible(&file_ext->rx_wait);
+
+ }
+}
+
+/**
+ * _heci_cmpl_iamthif: process completed iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @priv_cb_pos: callback block.
+ */
+static void _heci_cmpl_iamthif(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (dev->iamthif_canceled != 1) {
+ dev->iamthif_state = HECI_IAMTHIF_READ_COMPLETE;
+ dev->iamthif_stall_timer = 0;
+ memcpy(priv_cb_pos->response_buffer.data,
+ dev->iamthif_msg_buf,
+ dev->iamthif_msg_buf_index);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->pthi_read_complete_list.heci_cb.cb_list);
+ DBG("pthi read completed.\n");
+ } else {
+ run_next_iamthif_cmd(dev);
+ }
+ if (&dev->iamthif_file_ext.wait) {
+ DBG("completing pthi call back.\n");
+ wake_up_interruptible(&dev->iamthif_file_ext.wait);
+ }
+}
+/**
+ * heci_bh_handler - function called after ISR to handle the interrupt
+ * processing.
+ *
+ * @work: pointer to the work structure
+ *
+ * NOTE: This function is called by schedule work
+ */
+static void heci_bh_handler(struct work_struct *work)
+{
+ struct iamt_heci_device *dev =
+ container_of(work, struct iamt_heci_device, work);
+ struct io_heci_list complete_list;
+ __s32 slots;
+ int rets;
+ struct heci_cb_private *cb_pos = NULL, *cb_next = NULL;
+ struct heci_file_private *file_ext;
+ int bus_message_received = 0;
+ struct task_struct *tsk;
+
+ DBG("function called after ISR to handle the interrupt processing.\n");
+ /* initialize our complete list */
+ spin_lock_bh(&dev->device_lock);
+ heci_initialize_list(&complete_list, dev);
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ /* check if ME wants a reset */
+ if (((dev->me_hw_state & ME_RDY_HRA) == 0)
+ && (dev->heci_state != HECI_RESETING)
+ && (dev->heci_state != HECI_INITIALIZING)) {
+ DBG("FW not ready.\n");
+ heci_reset(dev, 1);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ /* check if we need to start the dev */
+ if ((dev->host_hw_state & H_RDY) == 0) {
+ if ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA) {
+ DBG("we need to start the dev.\n");
+ dev->host_hw_state |= (H_IE | H_IG | H_RDY);
+ heci_set_csr_register(dev);
+ if (dev->heci_state == HECI_INITIALIZING) {
+ dev->recvd_msg = 1;
+ spin_unlock_bh(&dev->device_lock);
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ return;
+
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ tsk = kthread_run(heci_task_initialize_clients,
+ dev, "heci_reinit");
+ if (IS_ERR(tsk)) {
+ int rc = PTR_ERR(tsk);
+ printk(KERN_WARNING "heci: Unable to"
+ "start the heci thread: %d\n", rc);
+ }
+ return;
+ }
+ } else {
+ DBG("enable interrupt FW not ready.\n");
+ heci_csr_enable_interrupts(dev);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ }
+ /* check slots avalable for reading */
+ slots = count_full_read_slots(dev);
+ DBG("slots =%08x extra_write_index =%08x.\n",
+ slots, dev->extra_write_index);
+ while ((slots > 0) && (!dev->extra_write_index)) {
+ DBG("slots =%08x extra_write_index =%08x.\n", slots,
+ dev->extra_write_index);
+ DBG("call heci_bh_read_handler.\n");
+ rets = heci_bh_read_handler(&complete_list, dev, &slots);
+ if (rets != 0)
+ goto end;
+ }
+ rets = heci_bh_write_handler(&complete_list, dev, &slots);
+end:
+ DBG("end of bottom half function.\n");
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ /* acknowledge interrupt and disable interrupts */
+ heci_csr_disable_interrupts(dev);
+
+ PREPARE_WORK(&dev->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler.\n");
+ rets = schedule_work(&dev->work);
+ if (!rets) {
+ printk(KERN_ERR "heci: schedule the heci_bh_handler"
+ " failed error=%x\n", rets);
+ }
+ } else {
+ heci_csr_enable_interrupts(dev);
+ }
+
+ if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) {
+ DBG("received waiting bus message\n");
+ bus_message_received = 1;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ if (bus_message_received) {
+ DBG("wake up dev->wait_recvd_msg\n");
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ bus_message_received = 0;
+ }
+ if ((complete_list.status != 0)
+ || list_empty(&complete_list.heci_cb.cb_list))
+ return;
+
+
+ list_for_each_entry_safe(cb_pos, cb_next,
+ &complete_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)cb_pos->file_private;
+ list_del(&cb_pos->cb_list);
+ if (file_ext != NULL) {
+ if (file_ext != &dev->iamthif_file_ext) {
+ DBG("completing call back.\n");
+ _heci_cmpl(file_ext, cb_pos);
+ cb_pos = NULL;
+ } else if (file_ext == &dev->iamthif_file_ext) {
+ _heci_cmpl_iamthif(dev, cb_pos);
+ }
+ }
+ }
+}
+
+
+/**
+ * heci_bh_read_handler - bottom half read routine after ISR to
+ * handle the read processing.
+ *
+ * @cmpl_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @slots: slots to read.
+ *
+ * @return 0 on success, <0 on failure.
+ */
+static int heci_bh_read_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+ struct heci_msg_hdr *heci_hdr;
+ int ret = 0;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (!dev->rd_msg_hdr) {
+ dev->rd_msg_hdr = read_heci_register(dev, ME_CB_RW);
+ DBG("slots=%08x.\n", *slots);
+ (*slots)--;
+ DBG("slots=%08x.\n", *slots);
+ }
+ heci_hdr = (struct heci_msg_hdr *) &dev->rd_msg_hdr;
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+
+ if ((heci_hdr->reserved) || !(dev->rd_msg_hdr)) {
+ DBG("corrupted message header.\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+
+ if ((heci_hdr->host_addr) || (heci_hdr->me_addr)) {
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe read host"
+ " client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ if ((file_pos->host_client_id == heci_hdr->host_addr)
+ && (file_pos->me_client_id == heci_hdr->me_addr))
+ break;
+ }
+
+ if (&file_pos->link == &dev->file_list) {
+ DBG("corrupted message header\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+ }
+ if (((*slots) * sizeof(__u32)) < heci_hdr->length) {
+ DBG("we can't read the message slots=%08x.\n", *slots);
+ /* we can't read the message */
+ ret = -ERANGE;
+ goto end;
+ }
+
+ /* decide where to read the message too */
+ if (!heci_hdr->host_addr) {
+ DBG("call heci_bh_read_bus_message.\n");
+ heci_bh_read_bus_message(dev, heci_hdr);
+ DBG("end heci_bh_read_bus_message.\n");
+ } else if ((heci_hdr->host_addr == dev->iamthif_file_ext.host_client_id)
+ && (HECI_FILE_CONNECTED == dev->iamthif_file_ext.state)
+ && (dev->iamthif_state == HECI_IAMTHIF_READING)) {
+ DBG("call heci_bh_read_iamthif_message.\n");
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ ret = heci_bh_read_pthi_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ } else {
+ DBG("call heci_bh_read_client_message.\n");
+ ret = heci_bh_read_client_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ }
+
+ /* reset the number of slots and header */
+ *slots = count_full_read_slots(dev);
+ dev->rd_msg_hdr = 0;
+
+ if (*slots == -ESLOTS_OVERFLOW) {
+ /* overflow - reset */
+ DBG("reseting due to slots overflow.\n");
+ /* set the event since message has been read */
+ ret = -ERANGE;
+ goto end;
+ }
+end:
+ return ret;
+}
+
+
+/**
+ * heci_bh_read_bus_message - bottom half read routine after ISR to
+ * handle the read bus message cmd processing.
+ *
+ * @dev: Device object for our driver
+ * @heci_hdr: header of bus message
+ */
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_bus_message *heci_msg;
+ struct hbm_host_version_response *version_res;
+ struct hbm_client_connect_response *connect_res;
+ struct hbm_client_connect_response *disconnect_res;
+ struct hbm_flow_control *flow_control;
+ struct hbm_props_response *props_res;
+ struct hbm_host_enum_response *enum_res;
+ struct hbm_client_disconnect_request *disconnect_req;
+ struct hbm_host_stop_request *h_stop_req;
+ int i;
+ unsigned char *buffer;
+
+ /* read the message to our buffer */
+ buffer = (unsigned char *) dev->rd_msg_buf;
+ BUG_ON(heci_hdr->length >= sizeof(dev->rd_msg_buf));
+ heci_read_slots(dev, buffer, heci_hdr->length);
+ heci_msg = (struct heci_bus_message *) buffer;
+
+ switch (*(__u8 *) heci_msg) {
+ case HOST_START_RES_CMD:
+ version_res = (struct hbm_host_version_response *) heci_msg;
+ if (version_res->host_version_supported) {
+ dev->version.major_version = HBM_MAJOR_VERSION;
+ dev->version.minor_version = HBM_MINOR_VERSION;
+ } else {
+ dev->version = version_res->me_max_version;
+ }
+ dev->recvd_msg = 1;
+ DBG("host start response message received.\n");
+ break;
+
+ case CLIENT_CONNECT_RES_CMD:
+ connect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_connect_response(dev, connect_res);
+ DBG("client connect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case CLIENT_DISCONNECT_RES_CMD:
+ disconnect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_disconnect_response(dev, disconnect_res);
+ DBG("client disconnect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case HECI_FLOW_CONTROL_CMD:
+ flow_control = (struct hbm_flow_control *) heci_msg;
+ heci_client_flow_control_response(dev, flow_control);
+ DBG("client flow control response message received.\n");
+ break;
+
+ case HOST_CLIENT_PROPERTEIS_RES_CMD:
+ props_res = (struct hbm_props_response *) heci_msg;
+ if (props_res->status != 0) {
+ BUG();
+ break;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ props_res->address) {
+ dev->me_clients[i].props =
+ props_res->client_properties;
+ break;
+ }
+
+ }
+ dev->recvd_msg = 1;
+ break;
+
+ case HOST_ENUM_RES_CMD:
+ enum_res = (struct hbm_host_enum_response *) heci_msg;
+ memcpy(dev->heci_me_clients, enum_res->valid_addresses, 32);
+ dev->recvd_msg = 1;
+ break;
+
+ case HOST_STOP_RES_CMD:
+ dev->heci_state = HECI_DISABLED;
+ DBG("reseting because of FW stop response.\n");
+ heci_reset(dev, 1);
+ break;
+
+ case CLIENT_DISCONNECT_REQ_CMD:
+ /* search for client */
+ disconnect_req =
+ (struct hbm_client_disconnect_request *) heci_msg;
+ heci_client_disconnect_request(dev, disconnect_req);
+ break;
+
+ case ME_STOP_REQ_CMD:
+ /* prepare stop request */
+ heci_hdr = (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ h_stop_req =
+ (struct hbm_host_stop_request *) &dev->ext_msg_buf[1];
+ memset(h_stop_req, 0, sizeof(struct hbm_host_stop_request));
+ h_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ h_stop_req->reason = DRIVER_STOP_REQUEST;
+ h_stop_req->reserved[0] = 0;
+ h_stop_req->reserved[1] = 0;
+ dev->extra_write_index = 2;
+ break;
+
+ default:
+ BUG();
+ break;
+
+ }
+}
+
+/**
+ * heci_bh_read_pthi_message - bottom half read routine after ISR to
+ * handle the read pthi message data processing.
+ *
+ * @complete_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @heci_hdr: header of pthi message
+ *
+ * @return 0 on success, <0 on failure.
+ */
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb;
+ unsigned char *buffer;
+
+ BUG_ON(heci_hdr->me_addr != dev->iamthif_file_ext.me_client_id);
+ BUG_ON(dev->iamthif_state != HECI_IAMTHIF_READING);
+
+ buffer = (unsigned char *) (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index);
+ BUG_ON(sizeof(dev->iamthif_msg_buf) <
+ (dev->iamthif_msg_buf_index + heci_hdr->length));
+
+ heci_read_slots(dev, buffer, heci_hdr->length);
+
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+
+ if (!(heci_hdr->msg_complete))
+ return 0;
+
+ DBG("pthi_message_buffer_index=%d\n", heci_hdr->length);
+ DBG("completed pthi read.\n ");
+ if (!dev->iamthif_current_cb)
+ return -ENODEV;
+
+ priv_cb = dev->iamthif_current_cb;
+ dev->iamthif_current_cb = NULL;
+
+ file_ext = (struct heci_file_private *)priv_cb->file_private;
+ if (!file_ext)
+ return -ENODEV;
+
+ dev->iamthif_stall_timer = 0;
+ priv_cb->information = dev->iamthif_msg_buf_index;
+ priv_cb->read_time = get_seconds();
+ if ((dev->iamthif_ioctl) && (file_ext == &dev->iamthif_file_ext)) {
+ /* found the iamthif cb */
+ DBG("complete the pthi read cb.\n ");
+ if (&dev->iamthif_file_ext) {
+ DBG("add the pthi read cb to complete.\n ");
+ list_add_tail(&priv_cb->cb_list,
+ &complete_list->heci_cb.cb_list);
+ }
+ }
+ return 0;
+}
+
+/**
+ * _heci_bh_state_ok - check if heci header matches file private data
+ *
+ * @file_ext: private data of the file object
+ * @heci_hdr: header of heci client message
+ *
+ * @return !=0 if matches, 0 if no match.
+ */
+static int _heci_bh_state_ok(struct heci_file_private *file_ext,
+ struct heci_msg_hdr *heci_hdr)
+{
+ return ((file_ext->host_client_id == heci_hdr->host_addr)
+ && (file_ext->me_client_id == heci_hdr->me_addr)
+ && (file_ext->state == HECI_FILE_CONNECTED)
+ && (HECI_READ_COMPLETE != file_ext->reading_state));
+}
+
+/**
+ * heci_bh_read_client_message - bottom half read routine after ISR to
+ * handle the read heci client message data processing.
+ *
+ * @complete_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @heci_hdr: header of heci client message
+ *
+ * @return 0 on success, <0 on failure.
+ */
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ unsigned char *buffer = NULL;
+
+ DBG("start client msg\n");
+ if (!((dev->read_list.status == 0) &&
+ !list_empty(&dev->read_list.heci_cb.cb_list)))
+ goto quit;
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if ((file_ext != NULL) &&
+ (_heci_bh_state_ok(file_ext, heci_hdr))) {
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_READING;
+ buffer = (unsigned char *)
+ (priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information);
+ BUG_ON(priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information);
+
+ if (priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information) {
+ DBG("message overflow.\n");
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENOMEM;
+ }
+ if (buffer) {
+ heci_read_slots(dev, buffer,
+ heci_hdr->length);
+ }
+ priv_cb_pos->information += heci_hdr->length;
+ if (heci_hdr->msg_complete) {
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ DBG("completed read host client = %d,"
+ "ME client = %d, "
+ "data length = %lu\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id,
+ priv_cb_pos->information);
+
+ *(priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information) = '\0';
+ DBG("priv_cb_pos->res_buffer - %s\n",
+ priv_cb_pos->response_buffer.data);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &complete_list->heci_cb.cb_list);
+ } else {
+ spin_unlock(&file_ext->read_io_lock);
+ }
+
+ break;
+ }
+
+ }
+
+quit:
+ DBG("message read\n");
+ if (!buffer) {
+ heci_read_slots(dev, (unsigned char *) dev->rd_msg_buf,
+ heci_hdr->length);
+ DBG("discarding message, header=%08x.\n",
+ *(__u32 *) dev->rd_msg_buf);
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_iamthif_read: prepare to read iamthif data.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ *
+ * @return 0, OK; otherwise, error.
+ */
+static int _heci_bh_iamthif_read(struct iamt_heci_device *dev, __s32 *slots)
+{
+
+ if (((*slots) * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr)
+ + sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, &dev->iamthif_file_ext)) {
+ DBG("iamthif flow control failed\n");
+ } else {
+ DBG("iamthif flow control success\n");
+ dev->iamthif_state = HECI_IAMTHIF_READING;
+ dev->iamthif_flow_control_pending = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_stall_timer = IAMTHIF_STALL_TIMER;
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+ }
+ return 0;
+ } else {
+ return -ECOMPLETE_MESSAGE;
+ }
+}
+
+/**
+ * _heci_bh_close: process close related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * @return 0, OK; otherwise, error.
+ */
+static int _heci_bh_close(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request) + 3) / 4;
+
+ if (!heci_disconnect(dev, file_ext)) {
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_hb_close: process read related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * @return 0, OK; otherwise, error.
+ */
+static int _heci_bh_read(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+
+/**
+ * _heci_bh_ioctl: process ioctl related operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * @return 0, OK; otherwise, error.
+ */
+static int _heci_bh_ioctl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request))) {
+ file_ext->state = HECI_FILE_CONNECTING;
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request) + 3) / 4;
+ if (!heci_connect(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl: process completed and no-iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * @return 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ (priv_cb_pos->request_buffer.size -
+ priv_cb_pos->information))) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = ((priv_cb_pos->request_buffer.size) -
+ (priv_cb_pos->information));
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ "heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n",
+ heci_hdr->length);
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ file_ext->status = 0;
+ priv_cb_pos->information += heci_hdr->length;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ (*slots) -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ priv_cb_pos->information += heci_hdr->length;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ " heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl_iamthif: process completed iamthif operation.
+ *
+ * @dev: Device object for our driver.
+ * @slots: free slots.
+ * @priv_cb_pos: callback block.
+ * @file_ext: private data of the file object.
+ * @cmpl_list: complete list.
+ *
+ * @return 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl_iamthif(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ dev->iamthif_msg_buf_size -
+ dev->iamthif_msg_buf_index)) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = dev->iamthif_msg_buf_size -
+ dev->iamthif_msg_buf_index;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index),
+ heci_hdr->length)) {
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+ priv_cb_pos->information = dev->iamthif_msg_buf_index;
+ file_ext->status = 0;
+ dev->iamthif_state = HECI_IAMTHIF_FLOW_CONTROL;
+ dev->iamthif_flow_control_pending = 1;
+ /* save iamthif cb sent to pthi client */
+ dev->iamthif_current_cb = priv_cb_pos;
+ list_move_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ } else {
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * heci_bh_write_handler - bottom half write routine after
+ * ISR to handle the write processing.
+ *
+ * @cmpl_list: An instance of our list structure
+ * @dev: Device object for our driver
+ * @slots: slots to write.
+ *
+ * @return 0 on success, <0 on failure.
+ */
+static int heci_bh_write_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ struct io_heci_list *list;
+ int ret;
+
+ if (!host_buffer_is_empty(dev)) {
+ DBG("host buffer is not empty.\n");
+ return 0;
+ }
+ dev->write_hang = -1;
+ *slots = count_empty_write_slots(dev);
+ /* complete all waiting for write CB */
+ DBG("complete all waiting for write cb.\n");
+
+ list = &dev->write_waiting_list;
+ if ((list->status == 0)
+ && !list_empty(&list->heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &list->heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext != NULL) {
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ if ((HECI_WRITING == file_ext->writing_state) &&
+ (priv_cb_pos->major_file_operations ==
+ HECI_WRITING) &&
+ (file_ext != &dev->iamthif_file_ext)) {
+ DBG("HECI WRITE COMPLETE\n");
+ file_ext->writing_state =
+ HECI_WRITE_COMPLETE;
+ list_add_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ }
+ if (file_ext == &dev->iamthif_file_ext) {
+ DBG("check iamthif flow control.\n");
+ if (dev->iamthif_flow_control_pending) {
+ ret = _heci_bh_iamthif_read(dev,
+ slots);
+ if (ret != 0)
+ return ret;
+ }
+ }
+ }
+
+ }
+ }
+
+ if ((dev->stop) && (!dev->wd_pending)) {
+ dev->wd_stoped = 1;
+ wake_up_interruptible(&dev->wait_stop_wd);
+ return 0;
+ }
+
+ if (dev->extra_write_index != 0) {
+ DBG("extra_write_index =%d.\n", dev->extra_write_index);
+ heci_write_message(dev,
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0],
+ (unsigned char *) &dev->ext_msg_buf[1],
+ (dev->extra_write_index - 1) * sizeof(__u32));
+ *slots -= dev->extra_write_index;
+ dev->extra_write_index = 0;
+ }
+ if (dev->heci_state == HECI_ENABLED) {
+ if ((dev->wd_pending)
+ && flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ if (!heci_send_wd(dev))
+ DBG("wd send failed.\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+
+ if (dev->wd_timeout != 0) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_START_WD_DATA_SIZE + 3) / 4;
+ dev->wd_due_counter = 2;
+ } else {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_WD_PARAMS_SIZE + 3) / 4;
+ dev->wd_due_counter = 0;
+ }
+
+ }
+ }
+ if (dev->stop)
+ return ~ENODEV;
+
+ /* complete control write list CB */
+ if (dev->ctrl_wr_list.status == 0) {
+ /* complete control write list CB */
+ DBG("complete control write list cb.\n");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_wr_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ }
+ switch (priv_cb_pos->major_file_operations) {
+ case HECI_CLOSE:
+ /* send disconnect message */
+ ret = _heci_bh_close(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_READ:
+ /* send flow control message */
+ ret = _heci_bh_read(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_IOCTL:
+ /* connect message */
+ if (!other_client_is_connecting(dev, file_ext))
+ continue;
+ ret = _heci_bh_ioctl(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+
+ default:
+ BUG();
+ }
+
+ }
+ }
+ /* complete write list CB */
+ if ((dev->write_list.status == 0)
+ && !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ DBG("complete write list cb.\n");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (file_ext != NULL) {
+ if (file_ext != &dev->iamthif_file_ext) {
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control"
+ " credentials for client"
+ " %d, not sending.\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl(dev, slots,
+ priv_cb_pos,
+ file_ext,
+ cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ } else if (file_ext == &dev->iamthif_file_ext) {
+ /* IAMTHIF IOCTL */
+ DBG("complete pthi write cb.\n");
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control"
+ " credentials for pthi"
+ " client %d.\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl_iamthif(dev, slots,
+ priv_cb_pos,
+ file_ext,
+ cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ }
+ }
+
+ }
+ }
+ return 0;
+}
+
+
+/**
+ * is_treat_specially_client - check if the message belong
+ * to the file private data.
+ *
+ * @file_ext: private data of the file object
+ * @rs: connect response bus message
+ * @dev: Device object for our driver
+ *
+ * @return 0 on success, <0 on failure.
+ */
+static int is_treat_specially_client(struct heci_file_private *file_ext,
+ struct hbm_client_connect_response *rs)
+{
+ int ret = 0;
+
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+ if (rs->status == 0) {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_CONNECTED;
+ file_ext->status = 0;
+ } else {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_DISCONNECTED;
+ file_ext->status = -ENODEV;
+ }
+ ret = 1;
+ }
+ DBG("client state = %d.\n", file_ext->state);
+ return ret;
+}
+
+/**
+ * heci_client_connect_response - connect response bh routine
+ *
+ * @dev: Device object for our driver
+ * @rs: connect response bus message
+ */
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ /* if WD or iamthif client treat specially */
+
+ if ((is_treat_specially_client(&(dev->wd_file_ext), rs)) ||
+ (is_treat_specially_client(&(dev->iamthif_file_ext), rs)))
+ return;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+ if (HECI_IOCTL == priv_cb_pos->major_file_operations) {
+ if (is_treat_specially_client(file_ext, rs)) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+ }
+}
+
+/**
+ * heci_client_disconnect_response - disconnect response bh routine
+ *
+ * @dev: Device object for our driver
+ * @rs: disconnect response bus message
+ */
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+ struct heci_file_private *file_ext;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (file_ext == NULL) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+
+ DBG("list_for_each_entry_safe in ctrl_rd_list.\n");
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+
+ list_del(&priv_cb_pos->cb_list);
+ if (rs->status == 0) {
+ file_ext->state =
+ HECI_FILE_DISCONNECTED;
+ }
+
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_flow_addr - tell they have same address.
+ *
+ * @file: private data of the file object.
+ * @flow: flow control.
+ *
+ * @return !=0, same; 0,not.
+ */
+static int same_flow_addr(struct heci_file_private *file,
+ struct hbm_flow_control *flow)
+{
+ return ((file->host_client_id == flow->host_addr)
+ && (file->me_client_id == flow->me_addr));
+}
+
+/**
+ * add_single_flow_creds - add single buffer credentials.
+ *
+ * @file: private data ot the file object.
+ * @flow: flow control.
+ */
+static void add_single_flow_creds(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow)
+{
+ struct heci_me_client *client;
+ int i;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ client = &dev->me_clients[i];
+ if ((client != NULL) &&
+ (flow->me_addr == client->client_id)) {
+ if (client->props.single_recv_buf != 0) {
+ client->flow_ctrl_creds++;
+ DBG("recv flow ctrl msg ME %d (single).\n",
+ flow->me_addr);
+ DBG("flow control credentials=%d.\n",
+ client->flow_ctrl_creds);
+ } else {
+ BUG(); /* error in flow control */
+ }
+ }
+ }
+}
+/**
+ * heci_client_flow_control_response - flow control response bh routine
+ *
+ * @dev: Device object for our driver
+ * @flow_control: flow control response bus message
+ */
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (flow_control->host_addr == 0) {
+ /* single receive buffer */
+ add_single_flow_creds(dev, flow_control);
+ } else {
+ /* normal connection */
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe in file_list\n");
+
+ DBG("file_ext of host client %d ME client %d.\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ DBG("flow ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ if (same_flow_addr(file_pos, flow_control)) {
+ DBG("recv ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ file_pos->flow_ctrl_creds++;
+ DBG("flow control credentials=%d.\n",
+ file_pos->flow_ctrl_creds);
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_disconn_addr - tell they have same address
+ *
+ * @file: private data of the file object.
+ * @disconn: disconnection request.
+ *
+ * @return !=0, same; 0,not.
+ */
+static int same_disconn_addr(struct heci_file_private *file,
+ struct hbm_client_disconnect_request *disconn)
+{
+ return ((file->host_client_id == disconn->host_addr)
+ && (file->me_client_id == disconn->me_addr));
+}
+
+/**
+ * heci_client_disconnect_request - disconnect request bh routine
+ *
+ * @dev: Device object for our driver.
+ * @disconnect_req: disconnect request bus message.
+ */
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_response *disconnect_res;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (same_disconn_addr(file_pos, disconnect_req)) {
+ DBG("disconnect request host client %d ME client %d.\n",
+ disconnect_req->host_addr,
+ disconnect_req->me_addr);
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->timer_count = 0;
+ if (file_pos == &dev->wd_file_ext) {
+ dev->wd_due_counter = 0;
+ dev->wd_pending = 0;
+ } else if (file_pos == &dev->iamthif_file_ext)
+ dev->iamthif_timer = 0;
+
+ /* prepare disconnect response */
+ heci_hdr =
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length =
+ sizeof(struct hbm_client_connect_response);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ disconnect_res =
+ (struct hbm_client_connect_response *)
+ &dev->ext_msg_buf[1];
+ disconnect_res->host_addr = file_pos->host_client_id;
+ disconnect_res->me_addr = file_pos->me_client_id;
+ *(__u8 *) (&disconnect_res->cmd) =
+ CLIENT_DISCONNECT_RES_CMD;
+ disconnect_res->status = 0;
+ dev->extra_write_index = 2;
+ break;
+ }
+ }
+}
+
+/**
+ * heci_timer - timer function.
+ *
+ * @data: pointer to the device structure
+ *
+ * NOTE: This function is called by timer interrupt work
+ */
+void heci_wd_timer(unsigned long data)
+{
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ DBG("send watchdog.\n");
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ /*** Watchdog ***/
+ if ((dev->wd_due_counter != 0) && (dev->wd_bypass == 0)) {
+ if (--dev->wd_due_counter == 0) {
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_wd(dev)) {
+ DBG("wd send failed.\n");
+ } else {
+ flow_ctrl_reduce(dev,
+ &dev->wd_file_ext);
+ }
+
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 2;
+ else
+ dev->wd_due_counter = 0;
+
+ } else
+ dev->wd_pending = 1;
+
+ }
+ }
+ if (dev->iamthif_stall_timer != 0) {
+ if (--dev->iamthif_stall_timer == 0) {
+ DBG("reseting because of hang to PTHI.\n");
+ heci_reset(dev, 1);
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->iamthif_current_cb)
+ heci_free_cb_private(dev->iamthif_current_cb);
+
+ spin_lock_bh(&dev->device_lock);
+ dev->iamthif_file_object = NULL;
+ dev->iamthif_current_cb = NULL;
+ run_next_iamthif_cmd(dev);
+ }
+ }
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+}
diff --git a/drivers/char/heci/io_heci.c b/drivers/char/heci/io_heci.c
new file mode 100644
index 0000000..9b9dfba
--- /dev/null
+++ b/drivers/char/heci/io_heci.c
@@ -0,0 +1,850 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/list.h>
+#include <linux/unistd.h>
+#include <linux/delay.h>
+
+#include "heci_data_structures.h"
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+/**
+ * heci_ioctl_get_version - the get driver version IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @*u_msg: pointer to user data struct in user space
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * @return 0 on success, <0 on failure.
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+
+ int rets = 0;
+ struct heci_driver_version *version;
+ struct heci_message_data res_msg;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev)
+ || (!file_ext))
+ return -ENODEV;
+
+ if (k_msg.size < (sizeof(struct heci_driver_version) - 2)) {
+ DBG("user buffer less than heci_driver_version.\n");
+ return -EMSGSIZE;
+ }
+
+ res_msg.data = kmalloc(sizeof(struct heci_driver_version), GFP_KERNEL);
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_driver_version));
+ return -ENOMEM;
+ }
+
+ version = (struct heci_driver_version *) res_msg.data;
+ version->major = MAJOR_VERSION;
+ version->minor = MINOR_VERSION;
+ version->hotfix = QUICK_FIX_NUMBER;
+ version->build = VER_BUILD;
+ res_msg.size = sizeof(struct heci_driver_version);
+ if (k_msg.size < sizeof(struct heci_driver_version))
+ res_msg.size -= 2;
+
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+end:
+ kfree(res_msg.data);
+ return rets;
+}
+
+/**
+ * heci_ioctl_connect_client - the connect to fw client IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @*u_msg: pointer to user data struct in user space
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * @return 0 on success, <0 on failure.
+ */
+int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file)
+{
+
+ int rets = 0;
+ struct heci_message_data req_msg, res_msg;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_client *client;
+ struct heci_file_private *file_ext;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ long timeout = 15; /*15 second */
+ __u8 i;
+ int err = 0;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file))
+ return -ENODEV;
+
+ file_ext = file->private_data;
+ if (!file_ext)
+ return -ENODEV;
+
+ if (k_msg.size != sizeof(struct guid)) {
+ DBG("user buffer size is not equal to size of struct "
+ "guid(16).\n");
+ return -EMSGSIZE;
+ }
+
+ if (!k_msg.data)
+ return -EIO;
+
+ req_msg.data = kmalloc(sizeof(struct guid), GFP_KERNEL);
+ res_msg.data = kmalloc(sizeof(struct heci_client), GFP_KERNEL);
+
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_client));
+ kfree(req_msg.data);
+ return -ENOMEM;
+ }
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ (int) sizeof(struct guid));
+ kfree(res_msg.data);
+ return -ENOMEM;
+ }
+ req_msg.size = sizeof(struct guid);
+ res_msg.size = sizeof(struct heci_client);
+
+ /* copy the message to kernel space -
+ * use a pointer already copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, k_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ /* buffered ioctl cb */
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb) {
+ rets = -ENOMEM;
+ goto end;
+ }
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->response_buffer.data = res_msg.data;
+ priv_cb->response_buffer.size = res_msg.size;
+ priv_cb->request_buffer.data = req_msg.data;
+ priv_cb->request_buffer.size = req_msg.size;
+ priv_cb->major_file_operations = HECI_IOCTL;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if ((file_ext->state != HECI_FILE_INITIALIZING) &&
+ (file_ext->state != HECI_FILE_DISCONNECTED)) {
+ rets = -EBUSY;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ /* find ME client we're trying to connect to */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp((struct guid *)req_msg.data,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (dev->me_clients[i].props.fixed_address == 0) {
+ file_ext->me_client_id =
+ dev->me_clients[i].client_id;
+ file_ext->state = HECI_FILE_CONNECTING;
+ }
+ break;
+ }
+ }
+ /* if we're connecting to PTHI client so we will use the exist
+ * connection
+ */
+ if (memcmp((struct guid *)req_msg.data, &heci_pthi_guid,
+ sizeof(struct guid)) == 0) {
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ if (heci_fe_same_id(file_ext, file_pos)) {
+ DBG("remove file private data node host"
+ " client = %d, ME client = %d.\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del(&file_pos->link);
+ }
+
+ }
+ DBG("free file private data memory.\n");
+ kfree(file_ext);
+ file_ext = NULL;
+ file->private_data = &dev->iamthif_file_ext;
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length =
+ dev->me_clients[i].props.max_msg_length;
+ client->protocol_version =
+ dev->me_clients[i].props.protocol_version;
+ rets = dev->iamthif_file_ext.status;
+ spin_unlock_bh(&dev->device_lock);
+
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ }
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state != HECI_FILE_CONNECTING) {
+ rets = -ENODEV;
+ spin_unlock(&file_ext->file_lock);
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ spin_unlock(&file_ext->file_lock);
+ /* prepare the output buffer */
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length = dev->me_clients[i].props.max_msg_length;
+ client->protocol_version = dev->me_clients[i].props.protocol_version;
+ if (dev->host_buffer_is_empty
+ && !other_client_is_connecting(dev, file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_connect(dev, file_ext)) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ } else {
+ file_ext->timer_count = HECI_CONNECT_TIMEOUT;
+ priv_cb->file_private = file_ext;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.
+ cb_list);
+ }
+
+
+ } else {
+ priv_cb->file_private = file_ext;
+ DBG("add connect cb to control write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+
+ if (HECI_FILE_CONNECTED == file_ext->state) {
+ DBG("successfully connected to FW client.\n");
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ } else {
+ DBG("failed to connect to FW client.file_ext->state = %d.\n",
+ file_ext->state);
+ if (!err) {
+ DBG("wait_event_interruptible_timeout failed on client"
+ " connect message fw response message.\n");
+ }
+ rets = -EFAULT;
+ goto remove_list;
+ }
+
+remove_list:
+ if (priv_cb) {
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_list(&dev->ctrl_rd_list, file_ext);
+ heci_flush_list(&dev->ctrl_wr_list, file_ext);
+ spin_unlock_bh(&dev->device_lock);
+ }
+end:
+ DBG("free connect cb memory.");
+ kfree(req_msg.data);
+ kfree(res_msg.data);
+ kfree(priv_cb);
+ return rets;
+}
+
+/**
+ * heci_ioctl_wd - the wd IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * @return 0 on success, <0 on failure.
+ */
+int heci_ioctl_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ struct heci_message_data req_msg; /*in kernel on the stack */
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size != HECI_WATCHDOG_DATA_SIZE) {
+ DBG("user buffer has invalid size.\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+
+ req_msg.data = kmalloc(HECI_WATCHDOG_DATA_SIZE, GFP_KERNEL);
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ HECI_WATCHDOG_DATA_SIZE);
+ return -ENOMEM;
+ }
+ req_msg.size = HECI_WATCHDOG_DATA_SIZE;
+
+ /* copy the message to kernel space - use a pointer already
+ * copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, req_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if (!dev->asf_mode) {
+ rets = -EIO;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ memcpy(&dev->wd_data[HECI_WD_PARAMS_SIZE], req_msg.data,
+ HECI_WATCHDOG_DATA_SIZE);
+
+ dev->wd_timeout = (req_msg.data[1] << 8) + req_msg.data[0];
+ dev->wd_pending = 0;
+ dev->wd_due_counter = 1; /* next timer */
+ if (dev->wd_timeout == 0) {
+ memcpy(dev->wd_data, &stop_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ } else {
+ memcpy(dev->wd_data, &start_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ mod_timer(&dev->wd_timer, jiffies);
+ }
+ spin_unlock_bh(&dev->device_lock);
+end:
+ kfree(req_msg.data);
+ return rets;
+}
+
+
+/**
+ * heci_ioctl_bypass_wd - the bypass_wd IOCTL function
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @k_msg: data in kernel on the stack
+ * @file_ext: private data of the file object
+ *
+ * @return 0 on success, <0 on failure.
+ */
+int heci_ioctl_bypass_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ __u8 flag = 0;
+ int rets = 0;
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size < 1) {
+ DBG("user buffer less than HECI_WATCHDOG_DATA_SIZE.\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+ if (copy_from_user(&flag, k_msg.data, 1)) {
+ rets = -EFAULT;
+ goto end;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ flag = flag ? (1) : (0);
+ dev->wd_bypass = flag;
+ spin_unlock_bh(&dev->device_lock);
+end:
+ return rets;
+}
+
+/**
+ * find_pthi_read_list_entry - finds a PTHIlist entry for current file
+ *
+ * @dev: Device object for our driver
+ * @file: pointer to file object
+ *
+ * @return returned a list entry on success, NULL on failure.
+ */
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct file *file)
+{
+ struct heci_file_private *file_ext_temp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if ((dev->pthi_read_complete_list.status == 0) &&
+ !list_empty(&dev->pthi_read_complete_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_read_complete_list.heci_cb.cb_list, cb_list) {
+ file_ext_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if ((file_ext_temp != NULL) &&
+ (file_ext_temp == &dev->iamthif_file_ext) &&
+ (priv_cb_pos->file_object == file))
+ return priv_cb_pos;
+ }
+ }
+ return NULL;
+}
+
+/**
+ * pthi_read - read data from pthi client
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @file: pointer to file object
+ * @*ubuf: pointer to user data in user space
+ * @length: data length to read
+ * @offset: data read offset
+ *
+ * @return
+ * returned data length on success,
+ * zero if no data to read,
+ * negative on failure.
+ */
+int pthi_read(struct iamt_heci_device *dev, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset)
+{
+
+ int rets = 0;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_file_private *file_ext = file->private_data;
+ __u8 i;
+ unsigned long currtime = get_seconds();
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ if ((file_ext == NULL) || (file_ext != &dev->iamthif_file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->iamthif_file_ext.me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients)
+ || (dev->me_clients[i].client_id !=
+ dev->iamthif_file_ext.me_client_id)) {
+ DBG("PTHI client not found.\n");
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ priv_cb = find_pthi_read_list_entry(dev, file);
+ if (!priv_cb) {
+ spin_unlock_bh(&dev->device_lock);
+ return 0; /* No more data to read */
+ } else {
+ if (priv_cb &&
+ (currtime - priv_cb->read_time > IAMTHIF_READ_TIMER)) {
+ /* 15 sec for the message has expired */
+ list_del(&priv_cb->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ETIMEDOUT;
+ goto free;
+ }
+ /* if the whole message will fit remove it from the list */
+ if ((priv_cb->information >= *offset) &&
+ (length >= (priv_cb->information - *offset)))
+ list_del(&priv_cb->cb_list);
+ else if ((priv_cb->information > 0) &&
+ (priv_cb->information <= *offset)) {
+ /* end of the message has been reached */
+ list_del(&priv_cb->cb_list);
+ rets = 0;
+ spin_unlock_bh(&dev->device_lock);
+ goto free;
+ }
+ /* else means that not full buffer will be read and do not
+ * remove message from deletion list
+ */
+ }
+ DBG("pthi priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("pthi priv_cb->information - %lu\n",
+ priv_cb->information);
+ spin_unlock_bh(&dev->device_lock);
+
+ /* length is being turncated to PAGE_SIZE, however,
+ * the information may be longer */
+ length = length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset);
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length))
+ rets = -EFAULT;
+ else {
+ rets = length;
+ if ((*offset + length) < priv_cb->information) {
+ *offset += length;
+ goto out;
+ }
+ }
+free:
+ DBG("free pthi cb memory.\n");
+ *offset = 0;
+ heci_free_cb_private(priv_cb);
+out:
+ return rets;
+}
+
+/**
+ * heci_start_read - the start read client message function.
+ *
+ * @dev: Device object for our driver
+ * @if_num: minor number
+ * @file_ext: private data of the file object
+ *
+ * @return 0 on success, <0 on failure.
+ */
+int heci_start_read(struct iamt_heci_device *dev, int if_num,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ __u8 i;
+ struct heci_cb_private *priv_cb = NULL;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext)) {
+ DBG("received wrong function input param.\n");
+ return -ENODEV;
+ }
+ if (file_ext->state != HECI_FILE_CONNECTED)
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ DBG("check if read is pending.\n");
+ if ((file_ext->read_pending) || (file_ext->read_cb != NULL)) {
+ DBG("read is pending.\n");
+ return -EBUSY;
+ }
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ DBG("allocation call back success\n"
+ "host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id)
+ break;
+
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if (i == dev->num_heci_me_clients) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+
+ priv_cb->response_buffer.size = dev->me_clients[i].props.max_msg_length;
+ spin_unlock_bh(&dev->device_lock);
+ priv_cb->response_buffer.data =
+ kmalloc(priv_cb->response_buffer.size, GFP_KERNEL);
+ if (!priv_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ DBG("allocation call back data success.\n");
+ priv_cb->major_file_operations = HECI_READ;
+ /* make sure information is zero before we start */
+ priv_cb->information = 0;
+ priv_cb->file_private = (void *) file_ext;
+ file_ext->read_cb = priv_cb;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ rets = -ENODEV;
+ goto unlock;
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+unlock:
+ spin_unlock_bh(&dev->device_lock);
+fail:
+ heci_free_cb_private(priv_cb);
+ return rets;
+}
+
+/**
+ * pthi_write: write iamthif data to pthi client
+ *
+ * @dev: Device object for our driver
+ * @priv_cb: heci call back struct
+ *
+ * @return 0 on success, <0 on failure.
+ */
+int pthi_write(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb)
+{
+ int rets = 0;
+ struct heci_msg_hdr heci_hdr;
+
+ if ((!dev) || (!priv_cb))
+ return -ENODEV;
+
+ DBG("write data to pthi client.\n");
+
+ dev->iamthif_state = HECI_IAMTHIF_WRITING;
+ dev->iamthif_current_cb = priv_cb;
+ dev->iamthif_file_object = priv_cb->file_object;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_msg_buf_size = priv_cb->request_buffer.size;
+ memcpy(dev->iamthif_msg_buf, priv_cb->request_buffer.data,
+ priv_cb->request_buffer.size);
+
+ if (flow_ctrl_creds(dev, &dev->iamthif_file_ext) &&
+ dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (priv_cb->request_buffer.size >
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr)) {
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = priv_cb->request_buffer.size;
+ heci_hdr.msg_complete = 1;
+ }
+
+ heci_hdr.host_addr = dev->iamthif_file_ext.host_client_id;
+ heci_hdr.me_addr = dev->iamthif_file_ext.me_client_id;
+ heci_hdr.reserved = 0;
+ dev->iamthif_msg_buf_index += heci_hdr.length;
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *)(dev->iamthif_msg_buf),
+ heci_hdr.length))
+ return -ENODEV;
+
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, &dev->iamthif_file_ext);
+ dev->iamthif_flow_control_pending = 1;
+ dev->iamthif_state = HECI_IAMTHIF_FLOW_CONTROL;
+ DBG("add pthi cb to write waiting list\n");
+ dev->iamthif_current_cb = priv_cb;
+ dev->iamthif_file_object = priv_cb->file_object;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ DBG("message does not complete, "
+ "so add pthi cb to write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ } else {
+ if (!(dev->host_buffer_is_empty))
+ DBG("host buffer is not empty");
+
+ DBG("No flow control credentials, "
+ "so add iamthif cb to write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return rets;
+}
+
+/**
+ * iamthif_ioctl_send_msg - send cmd data to pthi client
+ *
+ * @dev: Device object for our driver
+ *
+ * @return 0 on success, <0 on failure.
+ */
+void run_next_iamthif_cmd(struct iamt_heci_device *dev)
+{
+ struct heci_file_private *file_ext_tmp;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int status = 0;
+
+ if (!dev)
+ return;
+
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+ dev->iamthif_file_object = NULL;
+
+ if (dev->pthi_cmd_list.status == 0 &&
+ !list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)) {
+ DBG("complete pthi cmd_list cb.\n");
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_cmd_list.heci_cb.cb_list, cb_list) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext_tmp != NULL) &&
+ (file_ext_tmp == &dev->iamthif_file_ext)) {
+ status = pthi_write(dev, priv_cb_pos);
+ if (status != 0) {
+ DBG("pthi write failed status = %d\n",
+ status);
+ return;
+ }
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * heci_free_cb_private - free heci_cb_private related memory
+ *
+ * @priv_cb: heci callback struct
+ */
+void heci_free_cb_private(struct heci_cb_private *priv_cb)
+{
+ if (priv_cb == NULL)
+ return;
+
+ kfree(priv_cb->request_buffer.data);
+ kfree(priv_cb->response_buffer.data);
+ kfree(priv_cb);
+}
+
^ permalink raw reply related [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-05-20 0:11 Anas Nashif
` (3 preceding siblings ...)
2008-05-20 22:27 ` Jiri Slaby
@ 2008-05-23 7:04 ` Pavel Machek
4 siblings, 0 replies; 42+ messages in thread
From: Pavel Machek @ 2008-05-23 7:04 UTC (permalink / raw)
To: Anas Nashif; +Cc: Andrew Morton, linux-kernel
Hi!
> The Intel Management Engine Interface (aka HECI: Host Embedded
> Controller Interface ) enables communication between the host OS and
> the Management Engine firmware. MEI is bi-directional, and either the
> host or Intel AMT firmware can initiate transactions.
* uses homebrewn DBG(), could it use dprintk() or something.
* should probably come with Documentation/ file
* defines like H_IE are a bit too terse.
> +extern const struct guid heci_pthi_guid;
> +extern const struct guid heci_wd_guid;
> +extern const __u8 start_wd_params[];
> +extern const __u8 stop_wd_params[];
> +extern const __u8 heci_wd_state_independence_msg[2][4];
Externs should go to header file.
No need to use __u8 in kernel.
Variables need good names. pthi_guid is not one of them.
> +/**
> + * memory IO BAR definition
> + */
> +#define BAR_0 0
> +#define BAR_1 1
> +#define BAR_5 5
Heh. And comments should tell us what it is.
Hmm, is this kerneldoc? Does not seem like one. So don't use /**. Fix
this all over the patch.
> +/**
> + * heci_fe_same_id - tell if file extensions have same id
> + * @fe1 -file extension
> + * @fe2 -file extension
> + *
> + * @return :
> + * 1 - if ids are the same,
> + * 0 - if differ.
> + */
File extensions?!
> +static inline int heci_fe_same_id(struct heci_file_private *fe1,
> + struct heci_file_private *fe2)
> +{
> + if ((fe1->host_client_id == fe2->host_client_id)
> + && (fe1->me_client_id == fe2->me_client_id)) {
> + return 1;
> + } else {
> + return 0;
> + }
> +}
This can be written without the if.
> +#endif /* _HECI_H_ */
> diff --git a/drivers/char/heci/heci_data_structures.h
> b/drivers/char/heci/heci_data_structures.h
> new file mode 100644
> index 0000000..ac0f488
> --- /dev/null
> +++ b/drivers/char/heci/heci_data_structures.h
> @@ -0,0 +1,507 @@
> +/*
> + * Part of Intel(R) Manageability Engine Interface Linux driver
> + *
> + * Copyright (c) 2003 - 2008 Intel Corp.
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + * 1. Redistributions of source code must retain the above copyright
> + * notice, this list of conditions, and the following disclaimer,
> + * without modification.
> + * 2. Redistributions in binary form must reproduce at minimum a disclaimer
> + * substantially similar to the "NO WARRANTY" disclaimer below
> + * ("Disclaimer") and any redistribution must be conditioned upon
> + * including a substantially similar Disclaimer requirement for further
> + * binary redistribution.
> + * 3. Neither the names of the above-listed copyright holders nor the names
> + * of any contributors may be used to endorse or promote products derived
> + * from this software without specific prior written permission.
What kind of ninja mutant license is this?
> +/**
> + * Number of queue lists used by this driver
> + */
> +#define NUMBER_OF_LISTS 7
Yes, how very useful name. Plus, it is too generic and likely to
conflict with someone else.
> +#define IAMTHIF_MTU 4160
And this one seems encrypted.
> +
> +/**
> + * HECI HW Section
> + */
> +
> +/* HECI addresses and defines */
> +#define H_CB_WW 0
> +#define H_CSR 4
> +#define ME_CB_RW 8
> +#define ME_CSR_HA 0xC
As do this and registers below.
> +/**
> + * time to wait event
> + */
> +#define HECI_INTEROP_TIMEOUT (HZ * 7)
Could we get _useful_ comments?
> +/* File state */
> +enum file_state {
> + HECI_FILE_INITIALIZING = 0,
> + HECI_FILE_CONNECTING,
> + HECI_FILE_CONNECTED,
> + HECI_FILE_DISCONNECTING,
> + HECI_FILE_DISCONNECTED
> +};
What kind of files is this handling? Surely this is not a filesystem?
> +/* HECI states */
> +enum heci_states{
Missing space, and evil comment.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-05-20 0:28 ` Andrew Morton
2008-05-20 19:02 ` Gabriel C
@ 2008-05-22 16:51 ` Pavel Machek
1 sibling, 0 replies; 42+ messages in thread
From: Pavel Machek @ 2008-05-22 16:51 UTC (permalink / raw)
To: Andrew Morton; +Cc: Anas Nashif, linux-kernel
Hi!
> > We have addressed more issues raised on lkml after initial submission,
> > especially the legacy device support issue which was removed in this
> > patch.
> >
> > The Intel Management Engine Interface (aka HECI: Host Embedded
> > Controller Interface ) enables communication between the host OS and
> > the Management Engine firmware. MEI is bi-directional, and either the
> > host or Intel AMT firmware can initiate transactions.
> >
> > The core hardware architecture of Intel Active Management Technology
> > (Intel AMT) is resident in firmware. The micro-controller within the
> > chipset's graphics and memory controller (GMCH) hub houses the
> > Management Engine (ME) firmware, which implements various services
> > on behalf of management applications.
> >
> > Some of the ME subsystems that can be access via MEI driver:
> >
> > - Intel(R) Quiet System Technology (QST) is implemented as a firmware
> > subsystem that runs in the ME. Programs that wish to expose the
> > health monitoring and fan speed control capabilities of Intel(R) QST
> > will need to use the MEI driver to communicate with the ME sub-system.
> > - ASF is the "Alert Standard Format" which is an DMTF manageability
> > standard. It is implemented in the PC's hardware and firmware, and is
> > managed from a remote console.
> >
> > Most recent Intel desktop chipsets have one or more of the above ME
> > services. The MEI driver will make it possible to support the above
> > features on Linux and provides applications access to the ME and it's
> > features.
>
> What a lot of code.
>
> It'd be nice if the changelog were to describe the proposed and
> all-important kernel<->userspace interface, please. From a five-second
> peek it looks like a miscdev with ioctls? Ah, and there's read and
> write too.
Actuallly, we already have perfectly good interface for sensor-like
stuff -- in lm_sensors. Even acpi is moving in that direction...
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-05-20 0:11 Anas Nashif
` (2 preceding siblings ...)
2008-05-20 20:35 ` Carlos R. Mafra
@ 2008-05-20 22:27 ` Jiri Slaby
2008-05-23 7:04 ` Pavel Machek
4 siblings, 0 replies; 42+ messages in thread
From: Jiri Slaby @ 2008-05-20 22:27 UTC (permalink / raw)
To: Anas Nashif; +Cc: Andrew Morton, linux-kernel
On 05/20/2008 02:11 AM, Anas Nashif wrote:
> We have addressed more issues raised on lkml after initial submission,
> especially the legacy device support issue which was removed in this
> patch.
>
> The Intel Management Engine Interface (aka HECI: Host Embedded
> Controller Interface ) enables communication between the host OS and
> the Management Engine firmware. MEI is bi-directional, and either the
> host or Intel AMT firmware can initiate transactions.
[...]
> diff --git a/drivers/char/Makefile b/drivers/char/Makefile
> index 5407b76..26c81a0 100644
> --- a/drivers/char/Makefile
> +++ b/drivers/char/Makefile
> @@ -106,6 +106,7 @@ obj-$(CONFIG_IPMI_HANDLER) += ipmi/
>
> obj-$(CONFIG_HANGCHECK_TIMER) += hangcheck-timer.o
> obj-$(CONFIG_TCG_TPM) += tpm/
> +obj-$(CONFIG_HECI) += heci/
Who sets this config up?
>
> obj-$(CONFIG_PS3_FLASH) += ps3flash.o
>
[...]
> diff --git a/drivers/char/heci/heci_init.c b/drivers/char/heci/heci_init.c
> new file mode 100644
> index 0000000..ffd4f7f
> --- /dev/null
> +++ b/drivers/char/heci/heci_init.c
> @@ -0,0 +1,1104 @@
[...]
> +static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
> + long timeout)
> +{
> + int err = 0;
> +
> + err = wait_event_interruptible_timeout(dev->wait_recvd_msg,
> + (dev->recvd_msg), timeout);
> + return err;
> +}
return wait_event_interruptible_timeout();
[...]
> +static int host_start_message(struct iamt_heci_device *dev)
> +{
> + long timeout = 60; /* 60 second */
> +
> + struct heci_msg_hdr *heci_hdr;
> + struct hbm_host_version_request *host_start_req;
> + struct hbm_host_stop_request *host_stop_req;
> + int err = 0;
> +
> + /* host start message */
> + heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
> + heci_hdr->host_addr = 0;
> + heci_hdr->me_addr = 0;
> + heci_hdr->length = sizeof(struct hbm_host_version_request);
> + heci_hdr->msg_complete = 1;
> + heci_hdr->reserved = 0;
> +
> + host_start_req =
> + (struct hbm_host_version_request *) &dev->wr_msg_buf[1];
> + memset(host_start_req, 0, sizeof(host_start_req));
wrong memset
> + host_start_req->cmd.cmd = HOST_START_REQ_CMD;
> + host_start_req->reserved = 0;
> + host_start_req->host_version.major_version = HBM_MAJOR_VERSION;
> + host_start_req->host_version.minor_version = HBM_MINOR_VERSION;
> + dev->recvd_msg = 0;
> + if (!heci_write_message(dev, heci_hdr,
> + (unsigned char *) (host_start_req),
> + heci_hdr->length)) {
> + DBG("send version to fw fail.\n");
> + return -ENODEV;
> + }
> + DBG("call wait_event_interruptible_timeout for response message.\n");
> + /* wait for response */
> + err = heci_wait_event_int_timeout(dev, timeout * HZ);
> + if (!err && !dev->recvd_msg) {
> + DBG("wait_timeout failed on host start response message.\n");
> + return -ENODEV;
> + }
> + dev->recvd_msg = 0;
> + DBG("wait_timeout successful on host start response message.\n");
> + if ((dev->version.major_version != HBM_MAJOR_VERSION) ||
> + (dev->version.minor_version != HBM_MINOR_VERSION)) {
> + /* send stop message */
> + heci_hdr->host_addr = 0;
> + heci_hdr->me_addr = 0;
> + heci_hdr->length = sizeof(struct hbm_host_stop_request);
> + heci_hdr->msg_complete = 1;
> + heci_hdr->reserved = 0;
> +
> + host_stop_req =
> + (struct hbm_host_stop_request *) &dev->wr_msg_buf[1];
> +
> + memset(host_stop_req, 0, sizeof(host_stop_req));
same here
> + host_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
> + host_stop_req->reason = DRIVER_STOP_REQUEST;
> + memset(host_stop_req->reserved, 0,
> + sizeof(host_stop_req->reserved));
> + heci_write_message(dev, heci_hdr,
> + (unsigned char *) (host_stop_req),
> + heci_hdr->length);
> + DBG("version mismatch.\n");
> + return -ENODEV;
> + }
> +
> + return 0;
> +}
[...]
> +static void host_init_wd(struct iamt_heci_device *dev)
> +{
> +
> + spin_lock_bh(&dev->device_lock);
> +
> + heci_init_file_private(&dev->wd_file_ext, NULL);
> +
> + /* look for WD client and connect to it */
> + dev->wd_file_ext.state = HECI_FILE_DISCONNECTED;
> + dev->wd_timeout = 0;
> +
> + heci_check_asf_mode(dev);
> + if (dev->asf_mode) {
> + memcpy(dev->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
> + } else {
> + /* AMT mode */
> + dev->wd_timeout = AMT_WD_VALUE;
> + DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
> + memcpy(dev->wd_data, start_wd_params, HECI_WD_PARAMS_SIZE);
> + memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
> + &dev->wd_timeout, sizeof(__u16));
> + }
> +
> + /* find ME WD client */
> + heci_find_me_client(dev, &dev->wd_file_ext,
> + &heci_wd_guid, HECI_WD_HOST_CLIENT_ID);
> + spin_unlock_bh(&dev->device_lock);
> +
> + DBG("check wd_file_ext\n");
> + if (HECI_FILE_CONNECTING == dev->wd_file_ext.state) {
> + if (heci_connect_me_client(dev, &dev->wd_file_ext, 15) == 1) {
> + DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
> + if (dev->wd_timeout != 0)
> + dev->wd_due_counter = 1;
> + else
> + dev->wd_due_counter = 0;
> + DBG("successfully connected to WD client.\n");
> + }
> + } else
> + DBG("failed to find WD client.\n");
> +
> +
> + spin_lock_bh(&dev->device_lock);
> + dev->wd_timer.function = &heci_wd_timer;
> + dev->wd_timer.data = (unsigned long) dev;
setup_timer?
> + spin_unlock_bh(&dev->device_lock);
> +}
[...]
> +struct heci_file_private *alloc_priv(struct file *file)
not a good name.
> +{
[...]
> +int heci_disconnect_host_client(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> + int rets = 0, err = 0;
no need to init them
> + long timeout = 15; /*15 second */
> + struct heci_cb_private *priv_cb = NULL;
[...]
> diff --git a/drivers/char/heci/heci_interface.c b/drivers/char/heci/heci_interface.c
> new file mode 100644
> index 0000000..6369dd0
> --- /dev/null
> +++ b/drivers/char/heci/heci_interface.c
> @@ -0,0 +1,497 @@
[...]
> +int flow_ctrl_creds(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> + __u8 i;
> +
> + if (!dev->num_heci_me_clients)
> + return 0;
> +
> + if (file_ext == NULL)
> + return 0;
> +
> + if (file_ext->flow_ctrl_creds > 0)
> + return 1;
> +
> + for (i = 0; i < dev->num_heci_me_clients; i++) {
> + if (dev->me_clients[i].client_id == file_ext->me_client_id) {
> + if (dev->me_clients[i].flow_ctrl_creds > 0) {
> + BUG_ON(dev->me_clients[i].props.single_recv_buf
> + == 0);
> + return 1;
> + }
> + return 0;
> + }
> + }
> + BUG_ON(1);
So just BUG();
> + return 0;
> +}
> +
> +/**
> + * flow_ctrl_reduce - reduce flow_control .
> + *
> + * @dev -Device object for our driver
> + * @file_ext -extension of the file object
> + */
> +void flow_ctrl_reduce(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> + __u8 i;
> +
> + if (!dev->num_heci_me_clients)
> + return;
> +
> + for (i = 0; i < dev->num_heci_me_clients; i++) {
> + if (dev->me_clients[i].client_id == file_ext->me_client_id) {
> + if (dev->me_clients[i].props.single_recv_buf != 0) {
> + BUG_ON(dev->me_clients[i].flow_ctrl_creds <= 0);
> + dev->me_clients[i].flow_ctrl_creds--;
> + } else {
> + BUG_ON(file_ext->flow_ctrl_creds <= 0);
> + file_ext->flow_ctrl_creds--;
> + }
> + return;
> + }
> + }
> + BUG_ON(1);
ditto
> +}
> +
> +/**
> + * heci_send_flow_control - send flow control to fw.
> + *
> + * @dev -Device object for our driver
> + * @file_ext -extension of the file object
> + *
> + * @return :
> + * 1 if success
> + * 0 - otherwise.
> + */
> +int heci_send_flow_control(struct iamt_heci_device *dev,
> + struct heci_file_private *file_ext)
> +{
> + struct heci_msg_hdr *heci_hdr;
> + struct hbm_flow_control *heci_flow_control;
> +
> + heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
> + heci_hdr->host_addr = 0;
> + heci_hdr->me_addr = 0;
> + heci_hdr->length = sizeof(struct hbm_flow_control);
> + heci_hdr->msg_complete = 1;
> + heci_hdr->reserved = 0;
> +
> + heci_flow_control = (struct hbm_flow_control *) &dev->wr_msg_buf[1];
> + memset(heci_flow_control, 0, sizeof(heci_flow_control));
again?
> + heci_flow_control->host_addr = file_ext->host_client_id;
> + heci_flow_control->me_addr = file_ext->me_client_id;
> + heci_flow_control->cmd.cmd = FLOW_CONTROL_CMD;
[...]
> diff --git a/drivers/char/heci/heci_interface.h b/drivers/char/heci/heci_interface.h
> new file mode 100644
> index 0000000..4081fd3
> --- /dev/null
> +++ b/drivers/char/heci/heci_interface.h
> @@ -0,0 +1,169 @@
[...]
> +/* IOCTL commands */
> +#define HECI_IOCTL_LETTER 'H'
'H' all linux/hiddev.h
add
> +#define IOCTL_HECI_GET_VERSION \
> + _IOWR(HECI_IOCTL_LETTER , 0x800, struct heci_message_data)
> +#define IOCTL_HECI_CONNECT_CLIENT \
> + _IOWR(HECI_IOCTL_LETTER , 0x801, struct heci_message_data)
> +#define IOCTL_HECI_WD \
> + _IOWR(HECI_IOCTL_LETTER , 0x802, struct heci_message_data)
> +#define IOCTL_HECI_BYPASS_WD \
> + _IOWR(HECI_IOCTL_LETTER , 0x810, struct heci_message_data)
struct heci_message_data is not 32/64-bit friendly
_IOC_NRBITS is 8, 0x800 is far higher than that
[...]
> diff --git a/drivers/char/heci/heci_main.c b/drivers/char/heci/heci_main.c
> new file mode 100644
> index 0000000..608e1c7
> --- /dev/null
> +++ b/drivers/char/heci/heci_main.c
> @@ -0,0 +1,1544 @@
[...]
> +#ifdef HECI_DEBUG
> +int heci_debug = 1;
> +#else
> +int heci_debug; /* initialized to 0 automatically.*/
we know that, comment unneeded
> +#endif
> +MODULE_PARM_DESC(heci_debug, "Debug enabled or not");
so why not bool?
> +module_param(heci_debug, int, 0644);
> +
> +
[...]
> +/* heci_pci_tbl - PCI Device ID Table */
> +static struct pci_device_id heci_pci_tbl[] = {
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID01)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID02)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID03)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID04)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID05)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID06)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID07)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID08)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID09)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID10)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID11)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID12)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID13)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID14)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID15)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID16)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID17)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID18)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID19)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID20)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID21)},
> + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID22)},
> + /* required last entry */
> + {0, }
PCI_VDEVICE?
[...]
> +static struct pci_driver heci_driver = {
> + .name = heci_driver_name,
> + .id_table = heci_pci_tbl,
> + .probe = heci_probe,
> + .remove = heci_remove,
__devexit_p()
> + .shutdown = heci_remove,
you'll trigger remove twice, I think.
> +#ifdef CONFIG_PM
> + .suspend = heci_suspend,
> + .resume = heci_resume
> +#endif
define them as null on !PM to avoid these ifdefs.
> +};
[...]
> +static int heci_registration_cdev(struct cdev *dev, int hminor,
> + struct file_operations *fops)
> +{
> + int ret = 0, devno = MKDEV(heci_major, hminor);
do not init ret
> +
> + cdev_init(dev, fops);
> + dev->owner = THIS_MODULE;
> + dev->ops = fops;
no need to re-set
> + ret = cdev_add(dev, devno, 1);
> + /* Fail gracefully if need be */
> + if (ret) {
> + kobject_put(&dev->kobj);
why?
> + printk(KERN_ERR "%s: Error %d registering heci device %d\n",
> + THIS_MODULE->name, ret, hminor);
> + }
> + return ret;
> +}
> +
> +/* Display the version of heci driver. */
> +static ssize_t version_show(struct class *dev, char *buf)
> +{
> + return sprintf(buf, "%s %s.\n",
> + heci_driver_string, heci_driver_version);
> +}
> +
> +static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
> +
> +/**
> + * heci_sysfs_create - creates a struct class to contain heci info
> + * @owner - pointer to the module that is to "own" heci sysfs class
> + * @name - pointer to a string for the name of this class
the format is:
(* @parameterx(space)*: (description of parameter x)?)*
> + *
> + * @return :
> + * valid pointer to a struct class on success
> + * false pointer on failure
> + */
> +static struct class *heci_sysfs_create(struct module *owner, char *name)
[...]
> +/**
> + * heci_sysfs_device_create - adds two devices to sysfs for chararcter devices
> + * @cs - pointer to the struct class that the device to be registered on
> + *
> + * @return :
> + * 0 on success,
> + * negative on failure
> + */
> +static int heci_sysfs_device_create(struct class *cs)
> +{
> + int err = 0;
> +
> + if ((cs == NULL) || (IS_ERR(cs))) {
> + err = -EINVAL;
> + goto err_out;
> + }
> +
> + heci_class_dev = class_device_create(cs, NULL,
> + heci_cdev.dev,
> + NULL,
> + HECI_DEV_NAME);
device_create
> + if (IS_ERR(heci_class_dev))
> + err = PTR_ERR(heci_class_dev);
> +
> +err_out:
> + return err;
> +}
[...]
> +static int __init heci_init_module(void)
> +{
> + int ret = 0;
> + dev_t dev;
> +
> + printk(KERN_INFO "%s: %s - version %s\n",
> + THIS_MODULE->name, heci_driver_string, heci_driver_version);
> + printk(KERN_INFO "%s: %s\n", THIS_MODULE->name, heci_copyright);
> +
> + /* init pci module */
> + ret = pci_register_driver(&heci_driver);
> + if (ret < 0)
> + goto end;
> +
> + /* registration char devices */
> + ret = alloc_chrdev_region(&dev, HECI_MINORS_BASE, HECI_MINORS_COUNT,
> + HECI_DRIVER_NAME);
just one minor? why not misc_register?
> +
> + heci_major = MAJOR(dev);
[...]
> +static int __devinit heci_probe(struct pci_dev *pdev,
> + const struct pci_device_id *ent)
> +{
> + struct iamt_heci_device *dev = NULL;
> + int i, err = 0;
> +
> + if (heci_device) {
> + err = -EEXIST;
> + goto end;
> + }
> + /* enable pci dev */
> + err = pci_enable_device(pdev);
> + if (err) {
> + printk(KERN_ERR "%s: Failed to enable pci device.\n",
> + THIS_MODULE->name);
> + goto end;
> + }
> + /* set PCI host mastering */
> + pci_set_master(pdev);
> + /* pci request regions for heci driver */
> + err = pci_request_regions(pdev, heci_driver_name);
> + if (err) {
> + printk(KERN_ERR "%s: Failed to get pci regions.\n",
> + THIS_MODULE->name);
> + goto disable_device;
> + }
> + /* allocates and initializes the heci dev structure */
> + dev = init_heci_device(pdev);
> + if (!dev) {
> + err = -ENOMEM;
> + goto release_regions;
> + }
> + /* mapping IO device memory */
> + for (i = BAR_0; i <= BAR_5; i++) {
> + if (pci_resource_len(pdev, i) == 0)
> + continue;
> + if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
> + printk(KERN_ERR "%s: heci has an IO ports.\n",
> + THIS_MODULE->name);
> + goto free_device;
> + } else if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
> + if (dev->mem_base) {
> + printk(KERN_ERR "%s: Too many mem addresses.\n",
> + THIS_MODULE->name);
> + goto free_device;
> + }
> + dev->mem_base = pci_resource_start(pdev, i);
> + dev->mem_length = pci_resource_len(pdev, i);
> + }
> + }
> + if (!dev->mem_base) {
> + printk(KERN_ERR "%s: No address to use.\n", THIS_MODULE->name);
> + err = -ENODEV;
> + goto free_device;
> + }
> + dev->mem_addr = ioremap_nocache(dev->mem_base,
> + dev->mem_length);
> + if (!dev->mem_addr) {
> + printk(KERN_ERR "%s: Remap IO device memory failure.\n",
> + THIS_MODULE->name);
> + err = -ENOMEM;
> + goto free_device;
> + }
> + /* request and enable interrupt */
> + dev->irq = pdev->irq;
> + err = request_irq(dev->irq, heci_isr_interrupt, IRQF_SHARED,
> + heci_driver_name, dev);
> + if (err) {
> + printk(KERN_ERR "%s: Request_irq failure. irq = %d \n",
> + THIS_MODULE->name, dev->irq);
> + goto unmap_memory;
> + }
> +
> + if (heci_hw_init(dev)) {
> + printk(KERN_ERR "%s: Init hw failure.\n", THIS_MODULE->name);
This can be built tristate, right? What if THIS_MODULE is 0.
Use dev_* prints anyway.
> + err = -ENODEV;
> + goto release_irq;
> + }
> + init_timer(&dev->wd_timer);
not needed, if heci_initialize_clients called setup_timer
> + msleep(100); /* FW needs time to be ready to talk with us */
> + heci_initialize_clients(dev);
> + if (dev->heci_state != HECI_ENABLED) {
> + err = -ENODEV;
> + goto release_hw;
> + }
[...]
> +static void __devexit heci_remove(struct pci_dev *pdev)
> +{
> + struct iamt_heci_device *dev = pci_get_drvdata(pdev);
> + int err = 0;
> +
> + if (heci_device != pdev)
> + return;
> +
> + if (dev == NULL)
> + return;
> +
> + spin_lock_bh(&dev->device_lock);
> + if (dev->reinit_tsk != NULL) {
> + kthread_stop(dev->reinit_tsk);
> + dev->reinit_tsk = NULL;
> + }
> + spin_unlock_bh(&dev->device_lock);
> +
> + del_timer_sync(&dev->wd_timer);
> + if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
> + && dev->wd_timeout) {
> + spin_lock_bh(&dev->device_lock);
> + dev->wd_timeout = 0;
> + dev->wd_due_counter = 0;
> + memcpy(dev->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
> + dev->stop = 1;
> + if (dev->host_buffer_is_empty &&
> + flow_ctrl_creds(dev, &dev->wd_file_ext)) {
> + dev->host_buffer_is_empty = 0;
> +
> + if (!heci_send_wd(dev))
> + DBG("send stop WD failed\n");
> + else
> + flow_ctrl_reduce(dev, &dev->wd_file_ext);
> +
> + dev->wd_pending = 0;
> + } else {
> + dev->wd_pending = 1;
> + }
> + spin_unlock_bh(&dev->device_lock);
> + dev->wd_stoped = 0;
> +
> + err = wait_event_interruptible_timeout(dev->wait_stop_wd,
> + (dev->wd_stoped), 10 * HZ);
What is the retval for?
> + if (!dev->wd_stoped)
> + DBG("stop wd failed to complete.\n");
> + else
> + DBG("stop wd complete.\n");
> +
> + }
> +
> + heci_device = NULL;
> + if (dev->iamthif_file_ext.status == HECI_FILE_CONNECTED) {
> + dev->iamthif_file_ext.status = HECI_FILE_DISCONNECTING;
> + heci_disconnect_host_client(dev,
> + &dev->iamthif_file_ext);
> + }
> + if (dev->wd_file_ext.status == HECI_FILE_CONNECTED) {
> + dev->wd_file_ext.status = HECI_FILE_DISCONNECTING;
> + heci_disconnect_host_client(dev,
> + &dev->wd_file_ext);
> + }
> +
> + spin_lock_bh(&dev->device_lock);
> +
> + /* remove entry if already in list */
> + DBG("list del iamthif and wd file list.\n");
> + heci_remove_client_from_file_list(dev, dev->wd_file_ext.
> + host_client_id);
> + heci_remove_client_from_file_list(dev,
> + dev->iamthif_file_ext.host_client_id);
> +
> + dev->iamthif_current_cb = NULL;
> + dev->iamthif_file_ext.file = NULL;
> + dev->num_heci_me_clients = 0;
> +
> + spin_unlock_bh(&dev->device_lock);
> +
> + flush_scheduled_work();
> + /* disable interrupts */
> + dev->host_hw_state &= ~H_IE;
> + /* acknowledge interrupt and stop interupts */
> + write_heci_register(dev, H_CSR, dev->host_hw_state);
PCI posting?
> + free_irq(pdev->irq, dev);
> + pci_set_drvdata(pdev, NULL);
> +
> + if (dev->mem_addr)
> + iounmap(dev->mem_addr);
> +
> + kfree(dev);
> +
> + pci_release_regions(pdev);
> + pci_disable_device(pdev);
> +}
[...]
> +static ssize_t heci_read(struct file *file, char __user *ubuf,
> + size_t length, loff_t *offset)
> +{
> + int i;
> + int rets = 0, err = 0;
> + int if_num = MINOR((file->f_dentry->d_inode->i_rdev));
iminor?
> + struct heci_file_private *file_ext = file->private_data;
> + struct heci_cb_private *priv_cb_pos = NULL;
> + struct heci_cb_private *priv_cb = NULL;
> + struct iamt_heci_device *dev = NULL;
> +
> + if (!heci_device)
> + return -ENODEV;
> +
> + dev = pci_get_drvdata(heci_device);
> + if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
> + return -ENODEV;
> +
> + spin_lock_bh(&dev->device_lock);
> + if (dev->heci_state != HECI_ENABLED) {
> + spin_unlock_bh(&dev->device_lock);
> + return -ENODEV;
> + }
> + spin_unlock_bh(&dev->device_lock);
> +
> + spin_lock(&file_ext->file_lock);
> + if ((file_ext->sm_state & HECI_WD_STATE_INDEPENDENCE_MSG_SENT) == 0) {
> + spin_unlock(&file_ext->file_lock);
> + /* Do not allow to read watchdog client */
> + for (i = 0; i < dev->num_heci_me_clients; i++) {
> + if (memcmp(&heci_wd_guid,
> + &dev->me_clients[i].props.protocol_name,
> + sizeof(struct guid)) == 0) {
> + if (file_ext->me_client_id ==
> + dev->me_clients[i].client_id)
> + return -EBADF;
> + }
> + }
> + } else {
> + file_ext->sm_state &= ~HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
> + spin_unlock(&file_ext->file_lock);
> + }
> +
> + if (file_ext == &dev->iamthif_file_ext) {
> + rets = pthi_read(dev, if_num, file, ubuf, length, offset);
> + goto out;
> + }
> +
> + if (file_ext->read_cb && file_ext->read_cb->information > *offset) {
> + priv_cb = file_ext->read_cb;
> + goto copy_buffer;
> + } else if (file_ext->read_cb && file_ext->read_cb->information > 0 &&
> + file_ext->read_cb->information <= *offset) {
> + priv_cb = file_ext->read_cb;
> + rets = 0;
> + goto free;
> + } else if ((!file_ext->read_cb || file_ext->read_cb->information == 0)
> + && *offset > 0) {
> + /*Offset needs to be cleaned for contingous reads*/
> + *offset = 0;
> + rets = 0;
> + goto out;
> + }
> +
> + spin_lock(&file_ext->read_io_lock);
> + err = heci_start_read(dev, if_num, file_ext);
> + if (err != 0 && err != -EBUSY) {
> + DBG("heci start read failure with status = %d\n", err);
> + spin_unlock(&file_ext->read_io_lock);
> + rets = err;
> + goto out;
> + }
> + if (HECI_READ_COMPLETE != file_ext->reading_state
> + && !waitqueue_active(&file_ext->rx_wait)) {
> + if (file->f_flags & O_NONBLOCK) {
> + rets = -EAGAIN;
> + spin_unlock(&file_ext->read_io_lock);
> + goto out;
> + }
> + spin_unlock(&file_ext->read_io_lock);
> +
> + if (wait_event_interruptible(file_ext->rx_wait,
> + (HECI_READ_COMPLETE == file_ext->reading_state
> + || HECI_FILE_INITIALIZING == file_ext->state
> + || HECI_FILE_DISCONNECTED == file_ext->state
> + || HECI_FILE_DISCONNECTING == file_ext->state))) {
> + if (signal_pending(current)) {
> + rets = -EINTR;
> + goto out;
> + }
> + return -ERESTARTSYS;
> + }
> +
> + if (HECI_FILE_INITIALIZING == file_ext->state ||
> + HECI_FILE_DISCONNECTED == file_ext->state ||
> + HECI_FILE_DISCONNECTING == file_ext->state) {
> + rets = -EBUSY;
> + goto out;
> + }
> + spin_lock(&file_ext->read_io_lock);
> + }
> +
> + priv_cb = file_ext->read_cb;
> +
> + if (!priv_cb) {
> + spin_unlock(&file_ext->read_io_lock);
> + return -ENODEV;
> + }
> + if (file_ext->reading_state != HECI_READ_COMPLETE) {
> + spin_unlock(&file_ext->read_io_lock);
> + return 0;
> + }
> + spin_unlock(&file_ext->read_io_lock);
> + /* now copy the data to user space */
> +copy_buffer:
> + DBG("priv_cb->response_buffer size - %d\n",
> + priv_cb->response_buffer.size);
> + DBG("priv_cb->information - %lu\n",
> + priv_cb->information);
> + if (length == 0 || ubuf == NULL ||
> + *offset > priv_cb->information) {
> + rets = -EMSGSIZE;
> + goto free;
> + }
> +
> + /* length is being turncated to PAGE_SIZE, however, */
> + /* information size may be longer */
> + length = (length < (priv_cb->information - *offset) ?
> + length : (priv_cb->information - *offset));
> +
> + if (copy_to_user(ubuf,
> + priv_cb->response_buffer.data + *offset,
> + length)) {
> + rets = -EFAULT;
> + goto free;
> + } else {
no need to 'else' here
> + rets = length;
> + *offset += length;
> + if ((unsigned long)*offset < priv_cb->information)
> + goto out;
> + }
> +free:
> + spin_lock_bh(&dev->device_lock);
> + priv_cb_pos = find_read_list_entry(dev, file_ext);
> + /* Remove entry from read list */
> + if (priv_cb_pos != NULL)
> + list_del(&priv_cb_pos->cb_list);
> + spin_unlock_bh(&dev->device_lock);
> + heci_free_cb_private(priv_cb);
> + spin_lock(&file_ext->read_io_lock);
> + file_ext->reading_state = HECI_IDLE;
> + file_ext->read_cb = NULL;
> + file_ext->read_pending = 0;
> + spin_unlock(&file_ext->read_io_lock);
> +out: DBG("end heci read rets= %d\n", rets);
> + return rets;
> +}
> +
> +/**
> + * heci_write - the write function.
> + */
> +static ssize_t heci_write(struct file *file, const char __user *ubuf,
> + size_t length, loff_t *offset)
> +{
> + int rets = 0;
> + __u8 i;
> + int if_num = MINOR((file->f_dentry->d_inode->i_rdev));
...
> + struct heci_file_private *file_ext = file->private_data;
> + struct heci_cb_private *priv_write_cb = NULL;
> + struct heci_msg_hdr heci_hdr;
> + struct iamt_heci_device *dev = NULL;
> + unsigned long currtime = get_seconds();
[...]
> +static int heci_ioctl(struct inode *inode, struct file *file,
> + unsigned int cmd, unsigned long data)
->unlocked_ioctl
> +{
> + int rets = 0;
> + int if_num = MINOR(inode->i_rdev);
> + struct heci_file_private *file_ext = file->private_data;
> + /* in user space */
> + struct heci_message_data *u_msg = (struct heci_message_data *) data;
> + struct heci_message_data k_msg; /* all in kernel on the stack */
> + struct iamt_heci_device *dev = NULL;
[...]
> +#ifdef CONFIG_PM
> +static int heci_suspend(struct pci_dev *pdev, pm_message_t state)
> +{
> + struct iamt_heci_device *device = pci_get_drvdata(pdev);
> + int err = 0;
> +
> + spin_lock_bh(&device->device_lock);
> + if (device->reinit_tsk != NULL) {
> + kthread_stop(device->reinit_tsk);
> + device->reinit_tsk = NULL;
> + }
> + spin_unlock_bh(&device->device_lock);
> +
> + /* Stop watchdog if exists */
> + del_timer_sync(&device->wd_timer);
> + if (device->wd_file_ext.state == HECI_FILE_CONNECTED
> + && device->wd_timeout) {
> + spin_lock_bh(&device->device_lock);
> + g_sus_wd_timeout = device->wd_timeout;
> + device->wd_timeout = 0;
> + device->wd_due_counter = 0;
> + memcpy(device->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
> + device->stop = 1;
> + if (device->host_buffer_is_empty &&
> + flow_ctrl_creds(device, &device->wd_file_ext)) {
> + device->host_buffer_is_empty = 0;
> + if (!heci_send_wd(device))
> + DBG("send stop WD failed\n");
> + else
> + flow_ctrl_reduce(device, &device->wd_file_ext);
> +
> + device->wd_pending = 0;
> + } else {
> + device->wd_pending = 1;
> + }
> + spin_unlock_bh(&device->device_lock);
> + device->wd_stoped = 0;
> +
> + err = wait_event_interruptible_timeout(device->wait_stop_wd,
> + (device->wd_stoped),
> + 10 * HZ);
> + if (!device->wd_stoped)
> + DBG("stop wd failed to complete.\n");
> + else {
> + DBG("stop wd complete %d.\n", err);
> + err = 0;
> + }
> + }
> + /* Set new heci state */
> + spin_lock_bh(&device->device_lock);
> + if (device->heci_state == HECI_ENABLED ||
> + device->heci_state == HECI_RECOVERING_FROM_RESET) {
> + device->heci_state = HECI_POWER_DOWN;
> + heci_reset(device, 0);
> + }
> + spin_unlock_bh(&device->device_lock);
> +
> + pci_save_state(pdev);
> +
> + pci_disable_device(pdev);
> + free_irq(pdev->irq, device);
no device irq disabling?
> +
> + pci_set_power_state(pdev, PCI_D3hot);
> +
> + return err;
> +}
> +
> +static int heci_resume(struct pci_dev *pdev)
> +{
> + struct iamt_heci_device *device = NULL;
> + int err = 0;
> +
> + pci_set_power_state(pdev, PCI_D0);
> + pci_restore_state(pdev);
> +
> + device = pci_get_drvdata(pdev);
> + if (!device)
> + return -ENODEV;
> +
> + /* request and enable interrupt */
> + device->irq = pdev->irq;
so why do you need the copy of an irq?
> + err = request_irq(device->irq, heci_isr_interrupt, IRQF_SHARED,
> + heci_driver_name, device);
> + if (err) {
> + printk(KERN_ERR "%s: Request_irq failure. irq = %d \n",
> + THIS_MODULE->name, device->irq);
> + return err;
> + }
[...]
> diff --git a/drivers/char/heci/heci_version.h b/drivers/char/heci/heci_version.h
> new file mode 100644
> index 0000000..6cbb5e2
> --- /dev/null
> +++ b/drivers/char/heci/heci_version.h
> @@ -0,0 +1,56 @@
[...]
> +#ifndef HECI_VERSION_H
> +#define HECI_VERSION_H
> +
> +#define MAJOR_VERSION 5
> +#define MINOR_VERSION 0
> +#define QUICK_FIX_NUMBER 0
> +#define VER_BUILD 1
> +
> +#define str(s) name(s)
> +#define name(s) #s
> +#define DRIVER_V1 str(MAJOR_VERSION) "." str(MINOR_VERSION)
> +#define DRIVER_V2 str(QUICK_FIX_NUMBER) "." str(VER_BUILD)
hmm, __stringify()
> +
> +#define DRIVER_VERSION DRIVER_V1 "." DRIVER_V2
not good macro names at all
> +
> +#endif
> diff --git a/drivers/char/heci/interrupt.c b/drivers/char/heci/interrupt.c
> new file mode 100644
> index 0000000..c2fc1d0
> --- /dev/null
> +++ b/drivers/char/heci/interrupt.c
> @@ -0,0 +1,1551 @@
[...]
> +irqreturn_t heci_isr_interrupt(int irq, void *dev_id)
> +{
> + int err;
> + struct iamt_heci_device *device = (struct iamt_heci_device *) dev_id;
> + device->host_hw_state = read_heci_register(device, H_CSR);
> +
> + if ((device->host_hw_state & H_IS) != H_IS)
> + return IRQ_NONE;
> +
> + /* disable interrupts */
> + device->host_hw_state &= ~H_IE;
> + /* acknowledge interrupt and stop interupts */
> + write_heci_register(device, H_CSR, device->host_hw_state);
> + /**
> + * Our device interrupted, schedule work the heci_bh_handler
> + * to handle the interrupt processing. This needs to be a
> + * workqueue item since the handler can sleep.
> + */
> + PREPARE_WORK(&device->work, heci_bh_handler);
this is racy with bh?
> + DBG("schedule work the heci_bh_handler.\n");
> + err = schedule_work(&device->work);
> + if (!err) {
some ratelimit?
> + printk(KERN_ERR "%s: schedule the heci_bh_handler"
> + " failed error=%x\n", THIS_MODULE->name, err);
> + }
> + return IRQ_HANDLED;
> +}
[...]
> +static void heci_bh_handler(struct work_struct *work)
> +{
> + struct iamt_heci_device *dev =
> + container_of(work, struct iamt_heci_device, work);
> + struct io_heci_list complete_list;
> + __s32 slots;
> + int rets;
> + struct heci_cb_private *cb_pos = NULL, *cb_next = NULL;
> + struct heci_file_private *file_ext = NULL;
> + int bus_message_received = 0;
> + struct task_struct *tsk;
> +
> + DBG("function called after ISR to handle the interrupt processing.\n");
> + /* initialize our complete list */
> + spin_lock_bh(&dev->device_lock);
> + heci_initialize_list(&complete_list, dev);
> + dev->host_hw_state = read_heci_register(dev, H_CSR);
> + dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
> +
> + /* check if ME wants a reset */
> + if (((dev->me_hw_state & ME_RDY_HRA) == 0)
> + && (dev->heci_state != HECI_RESETING)
> + && (dev->heci_state != HECI_INITIALIZING)) {
> + DBG("FW not ready.\n");
> + heci_reset(dev, 1);
> + spin_unlock_bh(&dev->device_lock);
> + return;
> + }
> +
> + /* check if we need to start the dev */
> + if ((dev->host_hw_state & H_RDY) == 0) {
> + if ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA) {
> + DBG("we need to start the dev.\n");
> + dev->host_hw_state |= (H_IE | H_IG | H_RDY);
> + write_heci_register(dev, H_CSR, dev->host_hw_state);
> + if (dev->heci_state == HECI_INITIALIZING) {
> + dev->recvd_msg = 1;
> + spin_unlock_bh(&dev->device_lock);
> + wake_up_interruptible(&dev->wait_recvd_msg);
> + return;
> +
> + } else {
> + spin_unlock_bh(&dev->device_lock);
> + tsk = kthread_run(heci_task_initialize_clients,
> + dev, "heci_reinit");
> + if (IS_ERR(tsk)) {
> + int rc = PTR_ERR(tsk);
> + printk(KERN_WARNING "heci: Unable to"
> + "start the heci thread: %d\n", rc);
> + }
> + return;
> + }
> + } else {
> + DBG("enable interrupt FW not ready.\n");
> + dev->host_hw_state |= (H_IE);
> + write_heci_register(dev, H_CSR, dev->host_hw_state);
> + spin_unlock_bh(&dev->device_lock);
> + return;
> + }
> + }
> + /* check slots avalable for reading */
> + slots = count_full_read_slots(dev);
> + DBG("slots =%08x extra_write_index =%08x.\n",
> + slots, dev->extra_write_index);
> + while ((slots > 0) && (!dev->extra_write_index)) {
> + DBG("slots =%08x extra_write_index =%08x.\n", slots,
> + dev->extra_write_index);
> + DBG("call heci_bh_read_handler.\n");
> + rets = heci_bh_read_handler(&complete_list, dev, &slots);
> + if (rets != 0)
> + goto end;
> + }
> + rets = heci_bh_write_handler(&complete_list, dev, &slots);
> +end:
> + DBG("end of bottom half function.\n");
> + dev->host_hw_state = read_heci_register(dev, H_CSR);
> + dev->host_buffer_is_empty = host_buffer_is_empty(dev);
> +
> + if ((dev->host_hw_state & H_IS) == H_IS) {
> + PREPARE_WORK(&dev->work, heci_bh_handler);
racy with hardirq?
> + DBG("schedule work the heci_bh_handler.\n");
> + rets = schedule_work(&dev->work);
> + if (!rets) {
> + printk(KERN_ERR "%s: schedule the heci_bh_handler"
> + " failed error=%x\n", THIS_MODULE->name, rets);
> + }
[...]
> +static int _heci_bh_ioctl(struct iamt_heci_device *dev, __s32 *slots,
> + struct heci_cb_private *priv_cb_pos,
> + struct heci_file_private *file_ext,
> + struct io_heci_list *cmpl_list)
> +{
> + if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
> + sizeof(struct hbm_client_connect_request))) {
> + file_ext->state = HECI_FILE_CONNECTING;
> + *slots -= (sizeof(struct heci_msg_hdr) +
> + sizeof(struct hbm_client_connect_request) + 3) / 4;
> + if (!heci_connect(dev, file_ext)) {
> + file_ext->status = -ENODEV;
> + priv_cb_pos->information = 0;
> + list_del(&priv_cb_pos->cb_list);
> + return -ENODEV;
> + } else {
> + list_del(&priv_cb_pos->cb_list);
> + list_add_tail(&priv_cb_pos->cb_list,
> + &dev->ctrl_rd_list.heci_cb.cb_list);
> + file_ext->timer_count = CONNECT_TIMEOUT;
> + }
> + } else {
> + /* return the cancel routine */
> + list_del(&priv_cb_pos->cb_list);
> + return -ECORRUPTED_MESSAGE_HEADER;
Sorry, what?
> + }
> +
> + return 0;
> +}
> +
> +/**
> + * _heci_bh_cmpl: process completed and no-iamthif operation.
> + * @dev: device object.
> + * @slots: free slotsl.
> + * @priv_cb_pos: callback block.
> + * @file_ext: file extension.
> + * @cmpl_list: complete list.
> + *
> + * @return :
> + * 0, OK; otherwise, error.
> + */
> +static int _heci_bh_cmpl(struct iamt_heci_device *dev, __s32 *slots,
> + struct heci_cb_private *priv_cb_pos,
> + struct heci_file_private *file_ext,
> + struct io_heci_list *cmpl_list)
> +{
> + struct heci_msg_hdr *heci_hdr = NULL;
> +
> + if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
> + (priv_cb_pos->request_buffer.size -
> + priv_cb_pos->information))) {
> + heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
> + heci_hdr->host_addr = file_ext->host_client_id;
> + heci_hdr->me_addr = file_ext->me_client_id;
> + heci_hdr->length = ((priv_cb_pos->request_buffer.size) -
> + (priv_cb_pos->information));
> + heci_hdr->msg_complete = 1;
> + heci_hdr->reserved = 0;
> + DBG("priv_cb_pos->request_buffer.size =%d"
> + "heci_hdr->msg_complete= %d\n",
> + priv_cb_pos->request_buffer.size,
> + heci_hdr->msg_complete);
> + DBG("priv_cb_pos->information =%lu\n",
> + priv_cb_pos->information);
> + DBG("heci_hdr->length =%d\n",
> + heci_hdr->length);
> + *slots -= (sizeof(struct heci_msg_hdr) +
> + heci_hdr->length + 3) / 4;
> + if (!heci_write_message(dev, heci_hdr,
> + (unsigned char *)
> + (priv_cb_pos->request_buffer.data +
> + priv_cb_pos->information),
> + heci_hdr->length)) {
> + file_ext->status = -ENODEV;
> + list_del(&priv_cb_pos->cb_list);
> + list_add_tail(&priv_cb_pos->cb_list,
> + &cmpl_list->heci_cb.cb_list);
list_move_tail?
> + return -ENODEV;
> + } else {
> + flow_ctrl_reduce(dev, file_ext);
> + file_ext->status = 0;
> + priv_cb_pos->information += heci_hdr->length;
> + list_del(&priv_cb_pos->cb_list);
> + list_add_tail(&priv_cb_pos->cb_list,
> + &dev->write_waiting_list.heci_cb.cb_list);
...
> + }
> + } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
[...]
> +static int same_flow_addr(struct heci_file_private *file,
> + struct hbm_flow_control *flow)
> +{
> + if ((file->host_client_id == flow->host_addr)
> + && (file->me_client_id == flow->me_addr))
> + return 1;
> +
> + return 0;
> +}
just return <the_condition>;
> +static void add_single_flow_creds(struct iamt_heci_device *dev,
> + struct hbm_flow_control *flow)
> +{
> + struct heci_me_client *client = NULL;
> + int i;
> +
> + for (i = 0; i < dev->num_heci_me_clients; i++) {
> + client = &dev->me_clients[i];
> + if (flow->me_addr == client->client_id) {
> + if (client->props.single_recv_buf != 0) {
> + client->flow_ctrl_creds++;
> + DBG("recv flow ctrl msg ME %d (single).\n",
> + flow->me_addr);
> + DBG("flow control credentials=%d.\n",
> + client->flow_ctrl_creds);
> + } else {
> + BUG_ON(1); /* error in flow control */
BUG()
[...]
> +static int same_disconn_addr(struct heci_file_private *file,
> + struct hbm_client_disconnect_request *disconn)
> +{
> + if ((file->host_client_id == disconn->host_addr)
> + && (file->me_client_id == disconn->me_addr))
> + return 1;
> +
> + return 0;
> +}
...
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-05-20 0:11 Anas Nashif
2008-05-20 0:28 ` Andrew Morton
2008-05-20 15:42 ` Maxim Levitsky
@ 2008-05-20 20:35 ` Carlos R. Mafra
2008-05-20 22:27 ` Jiri Slaby
2008-05-23 7:04 ` Pavel Machek
4 siblings, 0 replies; 42+ messages in thread
From: Carlos R. Mafra @ 2008-05-20 20:35 UTC (permalink / raw)
To: Anas Nashif; +Cc: Andrew Morton, linux-kernel
> --- /dev/null
> +++ b/drivers/char/heci/heci_data_structures.h
> [...]
> +#define SECOND_TO_MILLI 1000
> +#define SECOND_TO_MICRO SECOND_TO_MILLI * 1000
> +#define SECOND_TO_100NANO SECOND_TO_MICRO * 10
These definitions are not used in any file, why don't you remove
them?
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-05-20 0:28 ` Andrew Morton
@ 2008-05-20 19:02 ` Gabriel C
2008-05-22 16:51 ` Pavel Machek
1 sibling, 0 replies; 42+ messages in thread
From: Gabriel C @ 2008-05-20 19:02 UTC (permalink / raw)
To: Andrew Morton; +Cc: Anas Nashif, linux-kernel
Andrew Morton wrote:
> On Mon, 19 May 2008 20:11:54 -0400
> Anas Nashif <nashif@linux.intel.com> wrote:
>
>> We have addressed more issues raised on lkml after initial submission,
>> especially the legacy device support issue which was removed in this
>> patch.
>>
>> The Intel Management Engine Interface (aka HECI: Host Embedded
>> Controller Interface ) enables communication between the host OS and
>> the Management Engine firmware. MEI is bi-directional, and either the
>> host or Intel AMT firmware can initiate transactions.
>>
>> The core hardware architecture of Intel Active Management Technology
>> (Intel AMT) is resident in firmware. The micro-controller within the
>> chipset's graphics and memory controller (GMCH) hub houses the
>> Management Engine (ME) firmware, which implements various services
>> on behalf of management applications.
>>
>> Some of the ME subsystems that can be access via MEI driver:
>>
>> - Intel(R) Quiet System Technology (QST) is implemented as a firmware
>> subsystem that runs in the ME. Programs that wish to expose the
>> health monitoring and fan speed control capabilities of Intel(R) QST
>> will need to use the MEI driver to communicate with the ME sub-system.
>> - ASF is the "Alert Standard Format" which is an DMTF manageability
>> standard. It is implemented in the PC's hardware and firmware, and is
>> managed from a remote console.
>>
>> Most recent Intel desktop chipsets have one or more of the above ME
>> services. The MEI driver will make it possible to support the above
>> features on Linux and provides applications access to the ME and it's
>> features.
>
> What a lot of code.
>
> It'd be nice if the changelog were to describe the proposed and
> all-important kernel<->userspace interface, please. From a five-second
> peek it looks like a miscdev with ioctls? Ah, and there's read and
> write too.
>
> What is the payload for those system calls, and the meanings of their
> return values, etc, etc?
>
> Does it make sense for this driver to be available on all
> architectures?
This patch is against what tree / kernel version ?
Won't compile on current kernels cause it still uses class_device_* so I guess it is based on 2.6.22/23 ?
Also in drivers/char/Makefile $(CONFIG_HECI) should be $(CONFIG_INTEL_MEI)
Gabriel
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-05-20 0:11 Anas Nashif
2008-05-20 0:28 ` Andrew Morton
@ 2008-05-20 15:42 ` Maxim Levitsky
2008-05-20 20:35 ` Carlos R. Mafra
` (2 subsequent siblings)
4 siblings, 0 replies; 42+ messages in thread
From: Maxim Levitsky @ 2008-05-20 15:42 UTC (permalink / raw)
To: Anas Nashif; +Cc: Andrew Morton, linux-kernel
On Tuesday, 20 May 2008 03:11:54 Anas Nashif wrote:
> We have addressed more issues raised on lkml after initial submission,
> especially the legacy device support issue which was removed in this
> patch.
>
> The Intel Management Engine Interface (aka HECI: Host Embedded
> Controller Interface ) enables communication between the host OS and
> the Management Engine firmware. MEI is bi-directional, and either the
> host or Intel AMT firmware can initiate transactions.
>
> The core hardware architecture of Intel Active Management Technology
> (Intel AMT) is resident in firmware. The micro-controller within the
> chipset's graphics and memory controller (GMCH) hub houses the
> Management Engine (ME) firmware, which implements various services
> on behalf of management applications.
>
> Some of the ME subsystems that can be access via MEI driver:
>
> - Intel(R) Quiet System Technology (QST) is implemented as a firmware
> subsystem that runs in the ME. Programs that wish to expose the
> health monitoring and fan speed control capabilities of Intel(R) QST
> will need to use the MEI driver to communicate with the ME sub-system.
I bought a system with intel DG965RY motherboard year ago, and still no support for its
O/B sensors in linux.
Can I ask again, when you expect it to be released.
At least intel should release documents how to access the QST sensors.
I know that HECI is first step for that, but it is not enought to read those sensors.
I Really hope there are good news,
Best regards,
Maxim Levitsky
^ permalink raw reply [flat|nested] 42+ messages in thread
* Re: [PATCH] Intel Management Engine Interface
2008-05-20 0:11 Anas Nashif
@ 2008-05-20 0:28 ` Andrew Morton
2008-05-20 19:02 ` Gabriel C
2008-05-22 16:51 ` Pavel Machek
2008-05-20 15:42 ` Maxim Levitsky
` (3 subsequent siblings)
4 siblings, 2 replies; 42+ messages in thread
From: Andrew Morton @ 2008-05-20 0:28 UTC (permalink / raw)
To: Anas Nashif; +Cc: linux-kernel
On Mon, 19 May 2008 20:11:54 -0400
Anas Nashif <nashif@linux.intel.com> wrote:
> We have addressed more issues raised on lkml after initial submission,
> especially the legacy device support issue which was removed in this
> patch.
>
> The Intel Management Engine Interface (aka HECI: Host Embedded
> Controller Interface ) enables communication between the host OS and
> the Management Engine firmware. MEI is bi-directional, and either the
> host or Intel AMT firmware can initiate transactions.
>
> The core hardware architecture of Intel Active Management Technology
> (Intel AMT) is resident in firmware. The micro-controller within the
> chipset's graphics and memory controller (GMCH) hub houses the
> Management Engine (ME) firmware, which implements various services
> on behalf of management applications.
>
> Some of the ME subsystems that can be access via MEI driver:
>
> - Intel(R) Quiet System Technology (QST) is implemented as a firmware
> subsystem that runs in the ME. Programs that wish to expose the
> health monitoring and fan speed control capabilities of Intel(R) QST
> will need to use the MEI driver to communicate with the ME sub-system.
> - ASF is the "Alert Standard Format" which is an DMTF manageability
> standard. It is implemented in the PC's hardware and firmware, and is
> managed from a remote console.
>
> Most recent Intel desktop chipsets have one or more of the above ME
> services. The MEI driver will make it possible to support the above
> features on Linux and provides applications access to the ME and it's
> features.
What a lot of code.
It'd be nice if the changelog were to describe the proposed and
all-important kernel<->userspace interface, please. From a five-second
peek it looks like a miscdev with ioctls? Ah, and there's read and
write too.
What is the payload for those system calls, and the meanings of their
return values, etc, etc?
Does it make sense for this driver to be available on all
architectures?
^ permalink raw reply [flat|nested] 42+ messages in thread
* [PATCH] Intel Management Engine Interface
@ 2008-05-20 0:11 Anas Nashif
2008-05-20 0:28 ` Andrew Morton
` (4 more replies)
0 siblings, 5 replies; 42+ messages in thread
From: Anas Nashif @ 2008-05-20 0:11 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-kernel
We have addressed more issues raised on lkml after initial submission,
especially the legacy device support issue which was removed in this
patch.
The Intel Management Engine Interface (aka HECI: Host Embedded
Controller Interface ) enables communication between the host OS and
the Management Engine firmware. MEI is bi-directional, and either the
host or Intel AMT firmware can initiate transactions.
The core hardware architecture of Intel Active Management Technology
(Intel AMT) is resident in firmware. The micro-controller within the
chipset's graphics and memory controller (GMCH) hub houses the
Management Engine (ME) firmware, which implements various services
on behalf of management applications.
Some of the ME subsystems that can be access via MEI driver:
- Intel(R) Quiet System Technology (QST) is implemented as a firmware
subsystem that runs in the ME. Programs that wish to expose the
health monitoring and fan speed control capabilities of Intel(R) QST
will need to use the MEI driver to communicate with the ME sub-system.
- ASF is the "Alert Standard Format" which is an DMTF manageability
standard. It is implemented in the PC's hardware and firmware, and is
managed from a remote console.
Most recent Intel desktop chipsets have one or more of the above ME
services. The MEI driver will make it possible to support the above
features on Linux and provides applications access to the ME and it's
features.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Signed-off-by: Marcin Obara <marcin.obara@intel.com>
---
diff --git a/MAINTAINERS b/MAINTAINERS
index e467758..5b8d2cd 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2082,6 +2082,15 @@ L: e1000-devel@lists.sourceforge.net
W: http://e1000.sourceforge.net/
S: Supported
+INTEL MANAGEABILITY ENGINE INTERFACE (HECI)
+P: Anas Nashif
+M: anas.nashif@intel.com
+P: Marcin Obara
+M: marcin.obara@intel.com
+W: http://www.openamt.org/
+L: openamt-devel@lists.sourceforge.net
+S: Supported
+
INTEL PRO/WIRELESS 2100 NETWORK CONNECTION SUPPORT
P: Zhu Yi
M: yi.zhu@intel.com
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 47c6be8..249f97e 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -1048,6 +1048,7 @@ config DEVPORT
default y
source "drivers/s390/char/Kconfig"
+source "drivers/char/heci/Kconfig"
endmenu
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 5407b76..26c81a0 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -106,6 +106,7 @@ obj-$(CONFIG_IPMI_HANDLER) += ipmi/
obj-$(CONFIG_HANGCHECK_TIMER) += hangcheck-timer.o
obj-$(CONFIG_TCG_TPM) += tpm/
+obj-$(CONFIG_HECI) += heci/
obj-$(CONFIG_PS3_FLASH) += ps3flash.o
diff --git a/drivers/char/heci/Kconfig b/drivers/char/heci/Kconfig
new file mode 100644
index 0000000..a4d8bf4
--- /dev/null
+++ b/drivers/char/heci/Kconfig
@@ -0,0 +1,12 @@
+#
+# HECI device configuration
+#
+
+config INTEL_MEI
+ tristate "Intel Management Engine Interface (MEI) Support"
+ depends on EXPERIMENTAL
+ ---help---
+ The Intel Management Engine Interface (Intel MEI) driver allows
+ applications to access the Active Management Technology
+ firmware and other Management Engine sub-systems.
+
diff --git a/drivers/char/heci/Makefile b/drivers/char/heci/Makefile
new file mode 100644
index 0000000..a2d7182
--- /dev/null
+++ b/drivers/char/heci/Makefile
@@ -0,0 +1,7 @@
+#
+## Makefile for the Intel MEI driver (heci)
+#
+
+obj-$(CONFIG_INTEL_MEI) += heci.o
+
+heci-objs := heci_init.o heci_interface.o heci_main.o interrupt.o io_heci.o
diff --git a/drivers/char/heci/heci.h b/drivers/char/heci/heci.h
new file mode 100644
index 0000000..92e4472
--- /dev/null
+++ b/drivers/char/heci/heci.h
@@ -0,0 +1,184 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_H_
+#define _HECI_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+extern const struct guid heci_pthi_guid;
+extern const struct guid heci_wd_guid;
+extern const __u8 start_wd_params[];
+extern const __u8 stop_wd_params[];
+extern const __u8 heci_wd_state_independence_msg[2][4];
+
+/**
+ * memory IO BAR definition
+ */
+#define BAR_0 0
+#define BAR_1 1
+#define BAR_5 5
+
+/**
+ * heci device ID
+ */
+#define PCI_HECI_DEVICE_ID01 0x2974
+#define PCI_HECI_DEVICE_ID02 0x2984
+#define PCI_HECI_DEVICE_ID03 0x2994
+#define PCI_HECI_DEVICE_ID04 0x29A4
+
+#define PCI_HECI_DEVICE_ID05 0x29B4
+#define PCI_HECI_DEVICE_ID06 0x29C4
+#define PCI_HECI_DEVICE_ID07 0x29D4
+#define PCI_HECI_DEVICE_ID08 0x29E4
+#define PCI_HECI_DEVICE_ID09 0x29F4
+
+#define PCI_HECI_DEVICE_ID10 0x28B4
+#define PCI_HECI_DEVICE_ID11 0x28C4
+#define PCI_HECI_DEVICE_ID12 0x28D4
+#define PCI_HECI_DEVICE_ID13 0x28E4
+#define PCI_HECI_DEVICE_ID14 0x28F4
+
+#define PCI_HECI_DEVICE_ID15 0x2A44
+#define PCI_HECI_DEVICE_ID16 0x2A54
+#define PCI_HECI_DEVICE_ID17 0x2A64
+#define PCI_HECI_DEVICE_ID18 0x2A74
+
+#define PCI_HECI_DEVICE_ID19 0x2E04
+#define PCI_HECI_DEVICE_ID20 0x2E14
+#define PCI_HECI_DEVICE_ID21 0x2E24
+#define PCI_HECI_DEVICE_ID22 0x2E34
+
+/**
+ * heci init function prototypes
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev);
+void heci_reset(struct iamt_heci_device *dev, int interrupts);
+int heci_hw_init(struct iamt_heci_device *dev);
+int heci_task_initialize_clients(void *data);
+int heci_initialize_clients(struct iamt_heci_device *dev);
+struct heci_file_private *alloc_priv(struct file *file);
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev);
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext);
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id);
+
+/**
+ * interrupt function prototype
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id);
+void heci_wd_timer(unsigned long data);
+
+/**
+ * input output function prototype
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_connect_client(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file);
+
+int heci_ioctl_wd(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_ioctl_bypass_wd(struct iamt_heci_device *device, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext);
+
+int heci_start_read(struct iamt_heci_device *device, int if_num,
+ struct heci_file_private *file_ext);
+
+int pthi_write(struct iamt_heci_device *device,
+ struct heci_cb_private *priv_cb);
+
+int pthi_read(struct iamt_heci_device *device, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset);
+
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *device,
+ struct file *file, struct heci_file_private *file_ext);
+
+void run_next_iamthif_cmd(struct iamt_heci_device *device);
+
+void heci_free_cb_private(struct heci_cb_private *priv_cb);
+
+/**
+ * heci_fe_same_id - tell if file extensions have same id
+ * @fe1 -file extension
+ * @fe2 -file extension
+ *
+ * @return :
+ * 1 - if ids are the same,
+ * 0 - if differ.
+ */
+static inline int heci_fe_same_id(struct heci_file_private *fe1,
+ struct heci_file_private *fe2)
+{
+ if ((fe1->host_client_id == fe2->host_client_id)
+ && (fe1->me_client_id == fe2->me_client_id)) {
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+#endif /* _HECI_H_ */
diff --git a/drivers/char/heci/heci_data_structures.h
b/drivers/char/heci/heci_data_structures.h
new file mode 100644
index 0000000..ac0f488
--- /dev/null
+++ b/drivers/char/heci/heci_data_structures.h
@@ -0,0 +1,507 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef _HECI_DATA_STRUCTURES_H_
+#define _HECI_DATA_STRUCTURES_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+
+/**
+ * error code definition
+ */
+#define ESLOTS_OVERFLOW 1
+#define ECORRUPTED_MESSAGE_HEADER 1000
+#define ECOMPLETE_MESSAGE 1001
+#define FC_MESSAGE_RESERVED_LENGTH 5
+
+/**
+ * Number of queue lists used by this driver
+ */
+#define NUMBER_OF_LISTS 7
+
+#define IAMTHIF_MTU 4160
+
+
+/**
+ * HECI HW Section
+ */
+
+/* HECI addresses and defines */
+#define H_CB_WW 0
+#define H_CSR 4
+#define ME_CB_RW 8
+#define ME_CSR_HA 0xC
+
+
+/* register bits - H_CSR */
+
+#define H_CBD 0xFF000000
+#define H_CBWP 0x00FF0000
+#define H_CBRP 0x0000FF00
+#define H_RST 0x00000010
+#define H_RDY 0x00000008
+#define H_IG 0x00000004
+#define H_IS 0x00000002
+#define H_IE 0x00000001
+
+
+/* register bits - ME_CSR_HA */
+#define ME_CBD_HRA 0xFF000000
+#define ME_CBWP_HRA 0x00FF0000
+#define ME_CBRP_HRA 0x0000FF00
+#define ME_RST_HRA 0x00000010
+#define ME_RDY_HRA 0x00000008
+#define ME_IG_HRA 0x00000004
+#define ME_IS_HRA 0x00000002
+#define ME_IE_HRA 0x00000001
+
+#define HECI_MINORS_BASE 1
+#define HECI_MINORS_COUNT 1
+
+#define HECI_MINOR_NUMBER 1
+#define MAX_OPEN_HANDLE_COUNT 253
+
+/**
+ * debug kernel print macro define
+ */
+extern int heci_debug;
+
+#define DBG(format, arg...) do { \
+ if (heci_debug) \
+ printk(KERN_ERR "%s: " format , __func__ , ## arg); \
+} while (0)
+
+
+/**
+ * time to wait event
+ */
+#define HECI_INTEROP_TIMEOUT (HZ * 7)
+
+/**
+ * watch dog definition
+ */
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+#define HECI_WD_STATE_INDEPENDENCE_MSG_SENT (1 << 0)
+
+#define HECI_WD_HOST_CLIENT_ID 1
+#define HECI_IAMTHIF_HOST_CLIENT_ID 2
+
+struct guid {
+ __u32 data1;
+ __u16 data2;
+ __u16 data3;
+ __u8 data4[8];
+} __attribute__((packed));
+
+/* File state */
+enum file_state {
+ HECI_FILE_INITIALIZING = 0,
+ HECI_FILE_CONNECTING,
+ HECI_FILE_CONNECTED,
+ HECI_FILE_DISCONNECTING,
+ HECI_FILE_DISCONNECTED
+};
+
+/* HECI states */
+enum heci_states{
+ HECI_INITIALIZING = 0,
+ HECI_ENABLED,
+ HECI_RESETING,
+ HECI_DISABLED,
+ HECI_RECOVERING_FROM_RESET,
+ HECI_POWER_DOWN,
+ HECI_POWER_UP
+};
+
+enum iamthif_states {
+ HECI_IAMTHIF_IDLE,
+ HECI_IAMTHIF_WRITING,
+ HECI_IAMTHIF_FLOW_CONTROL,
+ HECI_IAMTHIF_READING,
+ HECI_IAMTHIF_READ_COMPLETE
+};
+
+enum heci_file_transaction_states {
+ HECI_IDLE,
+ HECI_WRITING,
+ HECI_WRITE_COMPLETE,
+ HECI_FLOW_CONTROL,
+ HECI_READING,
+ HECI_READ_COMPLETE
+};
+
+/* HECI CB */
+enum heci_cb_major_types {
+ HECI_READ = 0,
+ HECI_WRITE,
+ HECI_IOCTL,
+ HECI_OPEN,
+ HECI_CLOSE
+};
+
+/* HECI user data struct */
+struct heci_message_data {
+ __u32 size;
+ char *data;
+} __attribute__((packed));
+
+#define SECOND_TO_MILLI 1000
+#define SECOND_TO_MICRO SECOND_TO_MILLI * 1000
+#define SECOND_TO_100NANO SECOND_TO_MICRO * 10
+
+#define CONNECT_TIMEOUT 3 /* at least 2 seconds */
+
+#define IAMTHIF_STALL_TIMER 12 /* seconds */
+#define IAMTHIF_READ_TIMER 15 /* seconds */
+
+struct heci_cb_private {
+ struct list_head cb_list;
+ enum heci_cb_major_types major_file_operations;
+ void *file_private;
+ struct heci_message_data request_buffer;
+ struct heci_message_data response_buffer;
+ unsigned long information;
+ unsigned long read_time;
+ struct file *file_object;
+};
+
+/* Private file struct */
+struct heci_file_private {
+ struct list_head link;
+ struct file *file;
+ enum file_state state;
+ wait_queue_head_t tx_wait;
+ wait_queue_head_t rx_wait;
+ wait_queue_head_t wait;
+ spinlock_t file_lock; /* file lock */
+ spinlock_t read_io_lock; /* read lock */
+ spinlock_t write_io_lock; /* write lock */
+ int read_pending;
+ int status;
+ /* ID of client connected */
+ __u8 host_client_id;
+ __u8 me_client_id;
+ __u8 flow_ctrl_creds;
+ __u8 timer_count;
+ enum heci_file_transaction_states reading_state;
+ enum heci_file_transaction_states writing_state;
+ int sm_state;
+ struct heci_cb_private *read_cb;
+};
+
+struct io_heci_list {
+ struct heci_cb_private heci_cb;
+ int status;
+ struct iamt_heci_device *device_extension;
+};
+
+struct heci_driver_version {
+ __u8 major;
+ __u8 minor;
+ __u8 hotfix;
+ __u16 build;
+} __attribute__((packed));
+
+
+struct heci_client {
+ __u32 max_msg_length;
+ __u8 protocol_version;
+} __attribute__((packed));
+
+/*
+ * HECI BUS Interface Section
+ */
+struct heci_msg_hdr {
+ __u32 me_addr:8;
+ __u32 host_addr:8;
+ __u32 length:9;
+ __u32 reserved:6;
+ __u32 msg_complete:1;
+} __attribute__((packed));
+
+
+struct hbm_cmd {
+ __u8 cmd:7;
+ __u8 is_response:1;
+} __attribute__((packed));
+
+
+struct heci_bus_message {
+ struct hbm_cmd cmd;
+ __u8 command_specific_data[];
+} __attribute__((packed));
+
+struct hbm_version {
+ __u8 minor_version;
+ __u8 major_version;
+} __attribute__((packed));
+
+struct hbm_host_version_request {
+ struct hbm_cmd cmd;
+ __u8 reserved;
+ struct hbm_version host_version;
+} __attribute__((packed));
+
+struct hbm_host_version_response {
+ struct hbm_cmd cmd;
+ int host_version_supported;
+ struct hbm_version me_max_version;
+} __attribute__((packed));
+
+struct hbm_host_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_stop_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_me_stop_request {
+ struct hbm_cmd cmd;
+ __u8 reason;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+struct hbm_host_enum_request {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+} __attribute__((packed));
+
+struct hbm_host_enum_response {
+ struct hbm_cmd cmd;
+ __u8 reserved[3];
+ __u8 valid_addresses[32];
+} __attribute__((packed));
+
+struct heci_client_properties {
+ struct guid protocol_name;
+ __u8 protocol_version;
+ __u8 max_number_of_connections;
+ __u8 fixed_address;
+ __u8 single_recv_buf;
+ __u32 max_msg_length;
+} __attribute__((packed));
+
+struct hbm_props_request {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 reserved[2];
+} __attribute__((packed));
+
+
+struct hbm_props_response {
+ struct hbm_cmd cmd;
+ __u8 address;
+ __u8 status;
+ __u8 reserved[1];
+ struct heci_client_properties client_properties;
+} __attribute__((packed));
+
+struct hbm_client_connect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved;
+} __attribute__((packed));
+
+struct hbm_client_connect_response {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 status;
+} __attribute__((packed));
+
+struct hbm_client_disconnect_request {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[1];
+} __attribute__((packed));
+
+struct hbm_flow_control {
+ struct hbm_cmd cmd;
+ __u8 me_addr;
+ __u8 host_addr;
+ __u8 reserved[FC_MESSAGE_RESERVED_LENGTH];
+} __attribute__((packed));
+
+struct heci_me_client {
+ struct heci_client_properties props;
+ __u8 client_id;
+ __u8 flow_ctrl_creds;
+} __attribute__((packed));
+
+/* private device struct */
+struct iamt_heci_device {
+ struct pci_dev *pdev; /* pointer to pci device struct */
+ /*
+ * lists of queues
+ */
+ /* array of pointers to aio lists */
+ struct io_heci_list *io_list_array[NUMBER_OF_LISTS];
+ struct io_heci_list read_list; /* driver read queue */
+ struct io_heci_list write_list; /* driver write queue */
+ struct io_heci_list write_waiting_list; /* write waiting queue */
+ struct io_heci_list ctrl_wr_list; /* managed write IOCTL list */
+ struct io_heci_list ctrl_rd_list; /* managed read IOCTL list */
+ struct io_heci_list pthi_cmd_list; /* PTHI list for cmd waiting */
+
+ /* driver managed PTHI list for reading completed pthi cmd data */
+ struct io_heci_list pthi_read_complete_list;
+ /*
+ * list of files
+ */
+ struct list_head file_list;
+ /*
+ * memory of device
+ */
+ unsigned int mem_base;
+ unsigned int mem_length;
+ char *mem_addr;
+ /*
+ * lock for the device
+ */
+ spinlock_t device_lock; /* device lock*/
+ /*
+ * interrupts
+ */
+ int irq;
+ struct work_struct work;
+ int recvd_msg;
+
+ struct task_struct *reinit_tsk;
+
+ struct timer_list wd_timer;
+ /*
+ * hw states of host and fw(ME)
+ */
+ __u32 host_hw_state;
+ __u32 me_hw_state;
+ /*
+ * waiting queue for receive message from FW
+ */
+ wait_queue_head_t wait_recvd_msg;
+ wait_queue_head_t wait_stop_wd;
+ /*
+ * heci device states
+ */
+ enum heci_states heci_state;
+ int stop;
+
+ __u32 extra_write_index;
+ __u32 rd_msg_buf[128]; /* used for control messages */
+ __u32 wr_msg_buf[128]; /* used for control messages */
+ __u32 ext_msg_buf[8]; /* for control responses */
+ __u32 rd_msg_hdr;
+
+ struct hbm_version version;
+
+ int host_buffer_is_empty;
+ struct heci_file_private wd_file_ext;
+ struct heci_me_client *me_clients; /* Note: memory has to be allocated*/
+ __u8 heci_me_clients[32]; /* list of existing clients */
+ __u8 num_heci_me_clients;
+ __u8 heci_host_clients[32]; /* list of existing clients */
+ __u8 current_host_client_id;
+
+ int wd_pending;
+ int wd_stoped;
+ __u16 wd_timeout; /* seconds ((wd_data[1] << 8) + wd_data[0]) */
+ unsigned char wd_data[HECI_START_WD_DATA_SIZE];
+
+
+ __u16 wd_due_counter;
+ int asf_mode;
+ int wd_bypass; /* if 1, don't refresh watchdog ME client */
+
+ struct file *iamthif_file_object;
+ struct heci_file_private iamthif_file_ext;
+ int iamthif_ioctl;
+ int iamthif_canceled;
+ __u32 iamthif_timer;
+ __u32 iamthif_stall_timer;
+ unsigned char iamthif_msg_buf[IAMTHIF_MTU];
+ __u32 iamthif_msg_buf_size;
+ __u32 iamthif_msg_buf_index;
+ int iamthif_flow_control_pending;
+ enum iamthif_states iamthif_state;
+
+ struct heci_cb_private *iamthif_current_cb;
+ __u8 write_hang;
+ int need_reset;
+ long open_handle_count;
+
+};
+
+/**
+ * read_heci_register - Read a byte from the heci device
+ * @device: the device structure
+ * @offset: offset from which to read the data
+ *
+ * Return:
+ * the byte read.
+ */
+__u32 read_heci_register(struct iamt_heci_device *device,
+ unsigned long offset);
+
+/**
+ * write_heci_register - Write 4 bytes to the heci device
+ * @device: the device structure
+ * @offset: offset from which to write the data
+ * @value: the byte to write
+ */
+void write_heci_register(struct iamt_heci_device *device, unsigned long offset,
+ __u32 value);
+
+#endif /* _HECI_DATA_STRUCTURES_H_ */
diff --git a/drivers/char/heci/heci_init.c b/drivers/char/heci/heci_init.c
new file mode 100644
index 0000000..ffd4f7f
--- /dev/null
+++ b/drivers/char/heci/heci_init.c
@@ -0,0 +1,1104 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/moduleparam.h>
+#include <linux/wait.h>
+
+#include "heci_data_structures.h"
+#include "heci_interface.h"
+#include "heci.h"
+
+
+const __u8 watch_dog_data[] = {
+ 1, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
+};
+const __u8 start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 };
+const __u8 stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10 };
+
+const __u8 heci_wd_state_independence_msg[2][4] = {
+ {0x05, 0x02, 0x51, 0x10},
+ {0x05, 0x02, 0x52, 0x10}
+};
+
+const struct guid heci_asf_guid = {
+ 0x75B30CD6, 0xA29E, 0x4AF7,
+ {0xA7, 0x12, 0xE6, 0x17, 0x43, 0x93, 0xC8, 0xA6}
+};
+const struct guid heci_wd_guid = {
+ 0x05B79A6F, 0x4628, 0x4D7F,
+ {0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB}
+};
+const struct guid heci_pthi_guid = {
+ 0x12f80028, 0xb4b7, 0x4b2d,
+ {0xac, 0xa8, 0x46, 0xe0, 0xff, 0x65, 0x81, 0x4c}
+};
+
+
+/**
+ * heci init function prototypes
+ */
+static int host_start_message(struct iamt_heci_device *dev);
+static int host_enum_clients_message(struct iamt_heci_device *dev);
+static int allocate_me_clients_storage(struct iamt_heci_device *dev);
+static void host_init_wd(struct iamt_heci_device *dev);
+static void host_init_iamthif(struct iamt_heci_device *dev);
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout);
+
+
+/**
+ * heci_initialize_list - Sets up a queue list.
+ *
+ * @list - An instance of our list structure
+ * @dev -Device object for our driver
+ */
+void heci_initialize_list(struct io_heci_list *list,
+ struct iamt_heci_device *dev)
+{
+ /* initialize our queue list */
+ INIT_LIST_HEAD(&list->heci_cb.cb_list);
+ list->status = 0;
+ list->device_extension = dev;
+}
+
+/**
+ * heci_flush_queues - flush our queues list belong to file_ext.
+ *
+ * @dev -Device object for our driver
+ * @file_ext - extension of the file object
+ *
+ */
+void heci_flush_queues(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int i;
+
+ if (!dev || !file_ext)
+ return;
+
+ /* flush our queue list belong to file_ext */
+ for (i = 0; i < NUMBER_OF_LISTS; i++) {
+ DBG("remove list entry belong to file_ext\n");
+ heci_flush_list(dev->io_list_array[i], file_ext);
+ }
+}
+
+
+/**
+ * heci_flush_list - remove list entry belong to file_ext.
+ *
+ * @list - An instance of our list structure
+ * @file_ext -extension of the file object
+ */
+void heci_flush_list(struct io_heci_list *list,
+ struct heci_file_private *file_ext)
+{
+ struct heci_file_private *file_ext_tmp = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if (!list || !file_ext)
+ return;
+
+ if (list->status != 0)
+ return;
+
+ if (list_empty(&list->heci_cb.cb_list))
+ return;
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &list->heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos) {
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext_tmp) {
+ if (heci_fe_same_id(file_ext, file_ext_tmp))
+ list_del(&priv_cb_pos->cb_list);
+ }
+ }
+ }
+}
+
+/**
+ * heci_reset_iamthif_params - initializes heci device iamthif
+ * @dev: The heci device structure
+ */
+static void heci_reset_iamthif_params(struct iamt_heci_device *dev)
+{
+ /* reset iamthif parameters. */
+ dev->iamthif_current_cb = NULL;
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_file_ext.file = NULL;
+ dev->iamthif_ioctl = 0;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+}
+
+/**
+ * init_heci_device - allocates and initializes the heci device structure
+ * @pdev: The pci device structure
+ *
+ * @return :
+ * The heci_device_device pointer on success, NULL on failure.
+ */
+struct iamt_heci_device *init_heci_device(struct pci_dev *pdev)
+{
+ int i;
+ struct iamt_heci_device *device;
+
+ device = kzalloc(sizeof(struct iamt_heci_device), GFP_KERNEL);
+ if (!device)
+ return NULL;
+
+ /* setup our list array */
+ device->io_list_array[0] = &device->read_list;
+ device->io_list_array[1] = &device->write_list;
+ device->io_list_array[2] = &device->write_waiting_list;
+ device->io_list_array[3] = &device->ctrl_wr_list;
+ device->io_list_array[4] = &device->ctrl_rd_list;
+ device->io_list_array[5] = &device->pthi_cmd_list;
+ device->io_list_array[6] = &device->pthi_read_complete_list;
+ INIT_LIST_HEAD(&device->file_list);
+ INIT_LIST_HEAD(&device->wd_file_ext.link);
+ INIT_LIST_HEAD(&device->iamthif_file_ext.link);
+ spin_lock_init(&device->device_lock);
+ init_waitqueue_head(&device->wait_recvd_msg);
+ init_waitqueue_head(&device->wait_stop_wd);
+ device->heci_state = HECI_INITIALIZING;
+ device->iamthif_state = HECI_IAMTHIF_IDLE;
+
+ /* init work for schedule work */
+ INIT_WORK(&device->work, NULL);
+ for (i = 0; i < NUMBER_OF_LISTS; i++)
+ heci_initialize_list(device->io_list_array[i], device);
+ device->pdev = pdev;
+ return device;
+}
+
+
+
+
+static int heci_wait_event_int_timeout(struct iamt_heci_device *dev,
+ long timeout)
+{
+ int err = 0;
+
+ err = wait_event_interruptible_timeout(dev->wait_recvd_msg,
+ (dev->recvd_msg), timeout);
+ return err;
+}
+
+/**
+ * heci_hw_init - init host and fw to start work.
+ *
+ * @dev -Device object for our driver
+ *
+ *@return:
+ * 0 on success.
+ * negative on failure
+ */
+int heci_hw_init(struct iamt_heci_device *dev)
+{
+ int err = 0;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ DBG("host_hw_state = 0x%08x, mestate = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ /* acknowledge interrupt and stop interupts */
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ }
+ dev->recvd_msg = 0;
+ DBG("reset in start the heci device.\n");
+
+ heci_reset(dev, 1);
+
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ /* wait for ME to turn on ME_RDY */
+ if (!dev->recvd_msg)
+ err = heci_wait_event_int_timeout(dev, HECI_INTEROP_TIMEOUT);
+
+ if (!err && !dev->recvd_msg) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("wait_event_interruptible_timeout failed"
+ "on wait for ME to turn on ME_RDY.\n");
+ return -ENODEV;
+ } else {
+ if (!(((dev->host_hw_state & H_RDY) == H_RDY)
+ && ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA))) {
+ dev->heci_state = HECI_DISABLED;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state,
+ dev->me_hw_state);
+
+ if (!(dev->host_hw_state & H_RDY) != H_RDY)
+ DBG("host turn off H_RDY.\n");
+
+ if (!(dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ DBG("ME turn off ME_RDY.\n");
+
+ printk(KERN_ERR
+ "%s: link layer initialization failed.\n",
+ THIS_MODULE->name);
+ return -ENODEV;
+ }
+ }
+ dev->recvd_msg = 0;
+ DBG("host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+ DBG("ME turn on ME_RDY and host turn on H_RDY.\n");
+ printk(KERN_INFO "%s: link layer has been established.\n",
+ THIS_MODULE->name);
+ return 0;
+}
+
+/**
+ * heci_reset - reset host and fw.
+ *
+ * @dev -Device object for our driver
+ * @interrupts - if interrupt should be enable after reset.
+ */
+void heci_reset(struct iamt_heci_device *dev, int interrupts)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int unexpected = 0;
+
+ if (dev->heci_state == HECI_RECOVERING_FROM_RESET) {
+ dev->need_reset = 1;
+ return;
+ }
+
+ if (dev->heci_state != HECI_INITIALIZING &&
+ dev->heci_state != HECI_DISABLED &&
+ dev->heci_state != HECI_POWER_DOWN &&
+ dev->heci_state != HECI_POWER_UP)
+ unexpected = 1;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+
+ DBG("before reset host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ dev->host_hw_state |= (H_RST | H_IG);
+
+ if (interrupts)
+ dev->host_hw_state |= (H_IE);
+ else
+ dev->host_hw_state &= ~(H_IE);
+
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ BUG_ON((dev->host_hw_state & H_RST) != H_RST);
+ BUG_ON((dev->host_hw_state & H_RDY) != 0);
+
+ dev->host_hw_state &= ~H_RST;
+ dev->host_hw_state |= H_IG;
+
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+
+ DBG("currently saved host_hw_state = 0x%08x.\n",
+ dev->host_hw_state);
+
+ dev->need_reset = 0;
+
+ if (dev->heci_state != HECI_INITIALIZING) {
+ if ((dev->heci_state != HECI_DISABLED) &&
+ (dev->heci_state != HECI_POWER_DOWN))
+ dev->heci_state = HECI_RESETING;
+
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->flow_ctrl_creds = 0;
+ file_pos->read_cb = NULL;
+ file_pos->timer_count = 0;
+ }
+ /* remove entry if already in list */
+ DBG("list del iamthif and wd file list.\n");
+ heci_remove_client_from_file_list(dev,
+ dev->wd_file_ext.host_client_id);
+
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+
+ heci_reset_iamthif_params(dev);
+ dev->wd_due_counter = 0;
+ dev->extra_write_index = 0;
+ }
+
+ dev->num_heci_me_clients = 0;
+ dev->rd_msg_hdr = 0;
+ dev->stop = 0;
+ dev->wd_pending = 0;
+
+ /* update the state of the registers after reset */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ DBG("after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
+ dev->host_hw_state, dev->me_hw_state);
+
+ if (unexpected)
+ printk(KERN_WARNING "%s: unexpected heci reset.\n",
+ THIS_MODULE->name);
+
+ /* Wake up all readings so they can be interrupted */
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (&file_pos->rx_wait &&
+ waitqueue_active(&file_pos->rx_wait)) {
+ printk(KERN_INFO "%s: Waking up client!\n",
+ THIS_MODULE->name);
+ wake_up_interruptible(&file_pos->rx_wait);
+ }
+ }
+ /* remove all waiting requests */
+ if (dev->write_list.status == 0 &&
+ !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ if (priv_cb_pos) {
+ list_del(&priv_cb_pos->cb_list);
+ heci_free_cb_private(priv_cb_pos);
+ }
+ }
+ }
+}
+
+/**
+ * heci_initialize_clients - routine.
+ *
+ * @dev - Device object for our driver
+ *
+ */
+int heci_initialize_clients(struct iamt_heci_device *dev)
+{
+ int status;
+
+ DBG("link is established start sending messages.\n");
+ /* link is established start sending messages. */
+ status = host_start_message(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("start sending messages failed.\n");
+ return status;
+ }
+ /* enumerate clients */
+
+ status = host_enum_clients_message(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("enum clients failed.\n");
+ return status;
+ }
+ /* allocate storage for ME clients representation */
+ status = allocate_me_clients_storage(dev);
+ if (status != 0) {
+ spin_lock_bh(&dev->device_lock);
+ dev->num_heci_me_clients = 0;
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("allocate clients failed.\n");
+ return status;
+ }
+
+ /*heci initialization wd */
+ host_init_wd(dev);
+ /*heci initialization iamthif client */
+ host_init_iamthif(dev);
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->need_reset) {
+ dev->need_reset = 0;
+ dev->heci_state = HECI_DISABLED;
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+
+ memset(dev->heci_host_clients, 0, sizeof(dev->heci_host_clients));
+ dev->open_handle_count = 0;
+ dev->heci_host_clients[0] |= 7;
+ dev->current_host_client_id = 3;
+ dev->heci_state = HECI_ENABLED;
+ spin_unlock_bh(&dev->device_lock);
+ DBG("initialization heci clients successful.\n");
+ return 0;
+}
+
+/**
+ * heci_task_initialize_clients - routine.
+ *
+ * @data - Device object for our driver
+ *
+ */
+int heci_task_initialize_clients(void *data)
+{
+ int ret;
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ spin_lock_bh(&dev->device_lock);
+ dev->reinit_tsk = current;
+ current->flags |= PF_NOFREEZE;
+ spin_unlock_bh(&dev->device_lock);
+
+ ret = heci_initialize_clients(dev);
+
+ spin_lock_bh(&dev->device_lock);
+ dev->reinit_tsk = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ return ret;
+}
+
+/**
+ * host_start_message - heci host send start message.
+ *
+ * @dev - Device object for our driver
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+static int host_start_message(struct iamt_heci_device *dev)
+{
+ long timeout = 60; /* 60 second */
+
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_version_request *host_start_req;
+ struct hbm_host_stop_request *host_stop_req;
+ int err = 0;
+
+ /* host start message */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_version_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_start_req =
+ (struct hbm_host_version_request *) &dev->wr_msg_buf[1];
+ memset(host_start_req, 0, sizeof(host_start_req));
+ host_start_req->cmd.cmd = HOST_START_REQ_CMD;
+ host_start_req->reserved = 0;
+ host_start_req->host_version.major_version = HBM_MAJOR_VERSION;
+ host_start_req->host_version.minor_version = HBM_MINOR_VERSION;
+ dev->recvd_msg = 0;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_start_req),
+ heci_hdr->length)) {
+ DBG("send version to fw fail.\n");
+ return -ENODEV;
+ }
+ DBG("call wait_event_interruptible_timeout for response message.\n");
+ /* wait for response */
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait_timeout failed on host start response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ DBG("wait_timeout successful on host start response message.\n");
+ if ((dev->version.major_version != HBM_MAJOR_VERSION) ||
+ (dev->version.minor_version != HBM_MINOR_VERSION)) {
+ /* send stop message */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_stop_req =
+ (struct hbm_host_stop_request *) &dev->wr_msg_buf[1];
+
+ memset(host_stop_req, 0, sizeof(host_stop_req));
+ host_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ host_stop_req->reason = DRIVER_STOP_REQUEST;
+ memset(host_stop_req->reserved, 0,
+ sizeof(host_stop_req->reserved));
+ heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_stop_req),
+ heci_hdr->length);
+ DBG("version mismatch.\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/**
+ * host_enum_clients_message - host send enumeration client request message.
+ *
+ * @dev - Device object for our driver
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+static int host_enum_clients_message(struct iamt_heci_device *dev)
+{
+ long timeout = 5; /*5 second */
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_host_enum_request *host_enum_req;
+ int err = 0;
+ __u8 i, j;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ /* enumerate clients */
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_enum_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1];
+ memset(host_enum_req, 0, sizeof(host_enum_req));
+ host_enum_req->cmd.cmd = HOST_ENUM_REQ_CMD;
+ memset(host_enum_req->reserved, 0, sizeof(host_enum_req->reserved));
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_enum_req),
+ heci_hdr->length)) {
+ DBG("send enumeration request failed.\n");
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev, timeout * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait_event_interruptible_timeout failed "
+ "on enumeration clients response message.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+
+ spin_lock_bh(&dev->device_lock);
+ /* count how many ME clients we have */
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0)
+ dev->num_heci_me_clients++;
+
+ }
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ return 0;
+}
+
+/**
+ * host_client_properties - reads properties for client
+ *
+ * @dev - Device object for our driver
+ * @idx: client index in me client array
+ * @client_id: id of the client
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+static int host_client_properties(struct iamt_heci_device *dev,
+ struct heci_me_client *client)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_props_request *host_cli_req;
+ int err;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_props_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ host_cli_req = (struct hbm_props_request *) &dev->wr_msg_buf[1];
+ memset(host_cli_req, 0, sizeof(struct hbm_props_request));
+ host_cli_req->cmd.cmd = HOST_CLIENT_PROPERTEIS_REQ_CMD;
+ host_cli_req->address = client->client_id;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) (host_cli_req),
+ heci_hdr->length)) {
+ DBG("send props request failed.\n");
+ return -ENODEV;
+ }
+ /* wait for response */
+ dev->recvd_msg = 0;
+ err = heci_wait_event_int_timeout(dev, 10 * HZ);
+ if (!err && !dev->recvd_msg) {
+ DBG("wait failed on props resp msg.\n");
+ return -ENODEV;
+ }
+ dev->recvd_msg = 0;
+ return 0;
+}
+
+/**
+ * allocate_me_clients_storage - allocate storage for me clients
+ *
+ * @dev - Device object for our driver
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+static int allocate_me_clients_storage(struct iamt_heci_device *dev)
+{
+ struct heci_me_client *clients;
+ struct heci_me_client *client;
+ __u8 num, i, j;
+ int err;
+
+ if (dev->num_heci_me_clients <= 0)
+ return 0;
+
+ spin_lock_bh(&dev->device_lock);
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+ spin_unlock_bh(&dev->device_lock);
+
+ /* allocate storage for ME clients representation */
+ clients = kcalloc(dev->num_heci_me_clients,
+ sizeof(struct heci_me_client), GFP_KERNEL);
+ if (!clients) {
+ DBG("memory allocation for ME clients failed.\n");
+ return -ENOMEM;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ dev->me_clients = clients;
+ spin_unlock_bh(&dev->device_lock);
+
+ num = 0;
+ for (i = 0; i < sizeof(dev->heci_me_clients); i++) {
+ for (j = 0; j < 8; j++) {
+ if ((dev->heci_me_clients[i] & (1 << j)) != 0) {
+ client = &dev->me_clients[num];
+ client->client_id = (i * 8) + j;
+ client->flow_ctrl_creds = 0;
+ err = host_client_properties(dev, client);
+ if (err != 0) {
+ spin_lock_bh(&dev->device_lock);
+ kfree(dev->me_clients);
+ dev->me_clients = NULL;
+ spin_unlock_bh(&dev->device_lock);
+ return err;
+ }
+ num++;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * heci_init_file_private - initializes private file structure.
+ *
+ * @priv: private file structure to be initialized
+ * @file: the file structure
+ *
+ */
+static void heci_init_file_private(struct heci_file_private *priv,
+ struct file *file)
+{
+ memset(priv, 0, sizeof(struct heci_file_private));
+ spin_lock_init(&priv->file_lock);
+ spin_lock_init(&priv->read_io_lock);
+ spin_lock_init(&priv->write_io_lock);
+ init_waitqueue_head(&priv->wait);
+ init_waitqueue_head(&priv->rx_wait);
+ DBG("priv->rx_wait =%p\n", &priv->rx_wait);
+ init_waitqueue_head(&priv->tx_wait);
+ INIT_LIST_HEAD(&priv->link);
+ priv->reading_state = HECI_IDLE;
+ priv->writing_state = HECI_IDLE;
+}
+
+/**
+ * heci_find_me_client - search for ME client guid
+ * sets client_id in heci_file_private if found
+ * @dev - Device object for our driver
+ * @priv: private file structure to set client_id in
+ * @cguid: searched guid of ME client
+ * @client_id: id of host client to be set in file private structure
+ *
+ * @return: me client index
+ */
+static __u8 heci_find_me_client(struct iamt_heci_device *dev,
+ struct heci_file_private *priv,
+ const struct guid *cguid, __u8 client_id)
+{
+ __u8 i;
+
+ if ((dev == NULL) || (priv == NULL) || (cguid == NULL))
+ return 0;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(cguid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ priv->me_client_id = dev->me_clients[i].client_id;
+ priv->state = HECI_FILE_CONNECTING;
+ priv->host_client_id = client_id;
+
+ list_add_tail(&priv->link, &dev->file_list);
+ return i;
+ }
+ }
+ return 0;
+}
+
+/**
+ * heci_check_asf_mode - check for ASF client
+ *
+ * @dev - Device object for our driver
+ *
+ */
+static void heci_check_asf_mode(struct iamt_heci_device *dev)
+{
+ __u8 i;
+
+ dev->asf_mode = 0;
+ /* find ME ASF client - otherwise assume AMT mode */
+ DBG("find ME ASF client - otherwise assume AMT mode.\n");
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_asf_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ dev->asf_mode = 1;
+ DBG("found ME ASF client.\n");
+ return;
+ }
+ }
+ DBG("assume AMT mode.\n");
+}
+
+/**
+ * heci_connect_me_client - connect ME client
+ * @dev - Device object for our driver
+ * @priv: private file structure
+ * @timeout: connect timeout in seconds
+ *
+ * @return: 1 - if connected, 0 - if not
+ */
+static __u8 heci_connect_me_client(struct iamt_heci_device *dev,
+ struct heci_file_private *priv,
+ long timeout)
+{
+ int err = 0;
+
+ if ((dev == NULL) || (priv == NULL))
+ return 0;
+
+ if (!heci_connect(dev, priv)) {
+ DBG("failed to call heci_connect for client_id=%d.\n",
+ priv->host_client_id);
+ spin_lock_bh(&dev->device_lock);
+ heci_remove_client_from_file_list(dev, priv->host_client_id);
+ priv->state = HECI_FILE_DISCONNECTED;
+ spin_unlock_bh(&dev->device_lock);
+ return 0;
+ }
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == priv->state ||
+ HECI_FILE_DISCONNECTED == priv->state),
+ timeout * HZ);
+ if (HECI_FILE_CONNECTED != priv->state) {
+ spin_lock_bh(&dev->device_lock);
+ heci_remove_client_from_file_list(dev, priv->host_client_id);
+ DBG("failed to connect client_id=%d state=%d.\n",
+ priv->host_client_id, priv->state);
+ if (err)
+ DBG("failed connect err=%08x\n", err);
+ priv->state = HECI_FILE_DISCONNECTED;
+ spin_unlock_bh(&dev->device_lock);
+ return 0;
+ }
+ DBG("successfully connected client_id=%d.\n",
+ priv->host_client_id);
+ return 1;
+}
+
+/**
+ * host_init_wd - heci initialization wd.
+ *
+ * @dev - Device object for our driver
+ *
+ */
+static void host_init_wd(struct iamt_heci_device *dev)
+{
+
+ spin_lock_bh(&dev->device_lock);
+
+ heci_init_file_private(&dev->wd_file_ext, NULL);
+
+ /* look for WD client and connect to it */
+ dev->wd_file_ext.state = HECI_FILE_DISCONNECTED;
+ dev->wd_timeout = 0;
+
+ heci_check_asf_mode(dev);
+ if (dev->asf_mode) {
+ memcpy(dev->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
+ } else {
+ /* AMT mode */
+ dev->wd_timeout = AMT_WD_VALUE;
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ memcpy(dev->wd_data, start_wd_params, HECI_WD_PARAMS_SIZE);
+ memcpy(dev->wd_data + HECI_WD_PARAMS_SIZE,
+ &dev->wd_timeout, sizeof(__u16));
+ }
+
+ /* find ME WD client */
+ heci_find_me_client(dev, &dev->wd_file_ext,
+ &heci_wd_guid, HECI_WD_HOST_CLIENT_ID);
+ spin_unlock_bh(&dev->device_lock);
+
+ DBG("check wd_file_ext\n");
+ if (HECI_FILE_CONNECTING == dev->wd_file_ext.state) {
+ if (heci_connect_me_client(dev, &dev->wd_file_ext, 15) == 1) {
+ DBG("dev->wd_timeout=%d.\n", dev->wd_timeout);
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 1;
+ else
+ dev->wd_due_counter = 0;
+ DBG("successfully connected to WD client.\n");
+ }
+ } else
+ DBG("failed to find WD client.\n");
+
+
+ spin_lock_bh(&dev->device_lock);
+ dev->wd_timer.function = &heci_wd_timer;
+ dev->wd_timer.data = (unsigned long) dev;
+ spin_unlock_bh(&dev->device_lock);
+}
+
+
+/**
+ * host_init_iamthif - heci initialization iamthif client.
+ *
+ * @dev - Device object for our driver
+ *
+ */
+static void host_init_iamthif(struct iamt_heci_device *dev)
+{
+ __u8 i;
+
+ spin_lock_bh(&dev->device_lock);
+
+ heci_init_file_private(&dev->iamthif_file_ext, NULL);
+
+ /* look for iamthif client and connect to it */
+ dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTED;
+
+ /* find ME PTHI client */
+ i = heci_find_me_client(dev, &dev->iamthif_file_ext,
+ &heci_pthi_guid, HECI_IAMTHIF_HOST_CLIENT_ID);
+
+ if (dev->asf_mode) {
+ dev->iamthif_file_ext.state =
+ HECI_FILE_DISCONNECTED;
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ if (dev->iamthif_file_ext.state == HECI_FILE_CONNECTING) {
+ BUG_ON(dev->me_clients[i].props.max_msg_length != IAMTHIF_MTU);
+
+ if (dev->me_clients[i].props.max_msg_length < IAMTHIF_MTU) {
+ dev->iamthif_file_ext.state = HECI_FILE_DISCONNECTED;
+ DBG("iamthif client buffer too small.\n");
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ if (heci_connect_me_client(dev, &dev->iamthif_file_ext,
+ 15) == 1) {
+ DBG("connected to iamthif client.\n");
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ }
+ spin_lock_bh(&dev->device_lock);
+ }
+ } else {
+ if (!dev->asf_mode)
+ DBG("failed to find iamthif client.\n");
+
+ }
+ spin_unlock_bh(&dev->device_lock);
+}
+
+/**
+ * alloc_priv - allocates a private file structure and set it up.
+ * @file: the file structure
+ *
+ * @return :
+ * The allocated file or NULL on failure
+ */
+struct heci_file_private *alloc_priv(struct file *file)
+{
+ struct heci_file_private *priv;
+
+ priv = kmalloc(sizeof(struct heci_file_private), GFP_KERNEL);
+ if (!priv)
+ return NULL;
+
+ heci_init_file_private(priv, file);
+
+ return priv;
+}
+
+
+
+/**
+ * heci_disconnect_host_client - send disconnect message to fw from host client.
+ *
+ * @dev -Device object for our driver
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+int heci_disconnect_host_client(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0, err = 0;
+ long timeout = 15; /*15 second */
+ struct heci_cb_private *priv_cb = NULL;
+
+ if ((!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext->state != HECI_FILE_DISCONNECTING)
+ return 0;
+
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->file_private = file_ext;
+ priv_cb->major_file_operations = HECI_CLOSE;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (heci_disconnect(dev, file_ext)) {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ DBG("failed to call heci_disconnect.\n");
+ goto free;
+ }
+ } else {
+ DBG("add disconnect cb to control write list\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+ if (HECI_FILE_DISCONNECTED == file_ext->state) {
+ rets = 0;
+ DBG("successfully disconnected from fw client.\n");
+ } else {
+ rets = -ENODEV;
+ if (HECI_FILE_DISCONNECTED != file_ext->state)
+ DBG("wrong status client disconnect.\n");
+
+ if (err)
+ DBG("wait failed disconnect err=%08x\n", err);
+
+ DBG("failed to disconnect from fw client.\n");
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_list(&dev->ctrl_rd_list, file_ext);
+ heci_flush_list(&dev->ctrl_wr_list, file_ext);
+ spin_unlock_bh(&dev->device_lock);
+free:
+ heci_free_cb_private(priv_cb);
+ return rets;
+}
+
+/**
+ * heci_remove_client_from_file_list -
+ * remove file extension from device file list
+ *
+ * @dev -Device object for our driver
+ * @host_client_id -host client id to be removed
+ *
+ */
+void heci_remove_client_from_file_list(struct iamt_heci_device *dev,
+ __u8 host_client_id)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (host_client_id == file_pos->host_client_id) {
+ DBG("remove host client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del_init(&file_pos->link);
+ break;
+ }
+ }
+}
diff --git a/drivers/char/heci/heci_interface.c b/drivers/char/heci/heci_interface.c
new file mode 100644
index 0000000..6369dd0
--- /dev/null
+++ b/drivers/char/heci/heci_interface.c
@@ -0,0 +1,497 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include "heci.h"
+#include "heci_interface.h"
+
+
+
+static const __u8 interface_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10};
+static const __u8 interface_stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10};
+
+/**
+ * read_heci_register - Read a byte from the heci device
+ * @device: the device structure
+ * @offset: offset from which to read the data
+ *
+ * Return:
+ * the byte read.
+ */
+__u32 read_heci_register(struct iamt_heci_device *device,
+ unsigned long offset)
+{
+ return readl(device->mem_addr + offset);
+}
+
+/**
+ * write_heci_register - Write 4 bytes to the heci device
+ * @device: the device structure
+ * @offset: offset from which to write the data
+ *
+ * @value: the byte to write
+ */
+void write_heci_register(struct iamt_heci_device *device, unsigned long offset,
+ __u32 value)
+{
+ writel(value, device->mem_addr + offset);
+}
+
+/**
+ * host_buffer_is_empty - check if host buffer is empty.
+ *
+ * @dev -Device object for our driver
+ *
+ * @return :
+ * 1 if empty
+ * 0 - otherwise.
+ */
+int host_buffer_is_empty(struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+ unsigned char buffer_depth, filled_slots, empty_slots;
+
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8);
+ write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16);
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = (unsigned char) (write_ptr - read_ptr);
+ empty_slots = buffer_depth - filled_slots;
+
+ if (filled_slots > 0)
+ return 0;
+
+ return 1;
+}
+
+/**
+ * count_empty_write_slots - count write empty slots.
+ *
+ * @dev - Device object for our driver
+ *
+ *
+ * @return :
+ * -1(ESLOTS_OVERFLOW) if overflow
+ * otherwise filed slots count
+ */
+__s32 count_empty_write_slots(struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+ unsigned char buffer_depth, filled_slots, empty_slots;
+
+ read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8);
+ write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16);
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = (unsigned char) (write_ptr - read_ptr);
+ empty_slots = buffer_depth - filled_slots;
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ return (__s32) empty_slots;
+}
+
+/**
+ * heci_write_message - write a message to heci device.
+ *
+ * @heci_hdr - header of message
+ * @write_buffer - message buffer will be write
+ * @write_length - message size will be write
+ *
+ * @return :
+ * 1 if success
+ * 0 - otherwise.
+ */
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length)
+{
+ __u32 temp_msg = 0;
+ unsigned long bytes_written = 0;
+ char read_ptr, write_ptr;
+ unsigned char buffer_depth, filled_slots, empty_slots;
+ unsigned long dw_to_write;
+
+ dw_to_write = ((write_length + 3) / 4);
+ DBG("host_hw_state = 0x%08x.\n", dev->host_hw_state);
+ DBG("heci_write_message header=%08x.\n", *((__u32 *) header));
+
+ read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8);
+ write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16);
+ buffer_depth = (unsigned char) ((dev->host_hw_state & H_CBD) >> 24);
+ filled_slots = (unsigned char) (write_ptr - read_ptr);
+ empty_slots = buffer_depth - filled_slots;
+ DBG("filled = %hu, empty = %hu.\n", filled_slots, empty_slots);
+
+ if (dw_to_write > empty_slots)
+ return 0;
+
+ write_heci_register(dev, H_CB_WW, *((__u32 *) header));
+
+ while (write_length >= 4) {
+ write_heci_register(dev, H_CB_WW,
+ *(__u32 *) (write_buffer + bytes_written));
+ bytes_written += 4;
+ write_length -= 4;
+ }
+
+ if (write_length > 0) {
+ memcpy(&temp_msg, &write_buffer[bytes_written], write_length);
+ write_heci_register(dev, H_CB_WW, temp_msg);
+ }
+
+ dev->host_hw_state |= H_IG;
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ if ((dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
+ return 0;
+
+ dev->write_hang = 0;
+ return 1;
+}
+
+/**
+ * count_full_read_slots - reset host and fw.
+ *
+ * @dev -Device object for our driver
+ *
+ *
+ * @return :
+ * -1(ESLOTS_OVERFLOW) if overflow
+ * otherwise filed slots count
+ */
+__s32 count_full_read_slots(struct iamt_heci_device *dev)
+{
+ char read_ptr, write_ptr;
+ unsigned char buffer_depth, filled_slots, empty_slots;
+
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+ read_ptr = (char) ((dev->me_hw_state & ME_CBRP_HRA) >> 8);
+ write_ptr = (char) ((dev->me_hw_state & ME_CBWP_HRA) >> 16);
+ buffer_depth = (unsigned char)((dev->me_hw_state & ME_CBD_HRA) >> 24);
+ filled_slots = (unsigned char) (write_ptr - read_ptr);
+ empty_slots = buffer_depth - filled_slots;
+
+ if (filled_slots > buffer_depth) {
+ /* overflow */
+ return -ESLOTS_OVERFLOW;
+ }
+
+ DBG("filled_slots =%08x \n", filled_slots);
+ return (__s32) filled_slots;
+}
+
+/**
+ * heci_read_slots - read a message from heci device.
+ *
+ * @dev - device object for our driver
+ * @buffer - message buffer will be write
+ * @buffer_length - message size will be read
+ */
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length)
+{
+ __u32 i = 0;
+ unsigned char temp_buf[sizeof(__u32)];
+
+ while (buffer_length >= sizeof(__u32)) {
+ ((__u32 *) buffer)[i] = read_heci_register(dev, ME_CB_RW);
+ DBG("buffer[%d]= %d\n", i, ((__u32 *) buffer)[i]);
+ i++;
+ buffer_length -= sizeof(__u32);
+ }
+
+ if (buffer_length > 0) {
+ *((__u32 *) &temp_buf) = read_heci_register(dev, ME_CB_RW);
+ memcpy(&buffer[i * 4], temp_buf, buffer_length);
+ }
+
+ dev->host_hw_state |= H_IG;
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+}
+
+/**
+ * flow_ctrl_creds - check flow_control credentials.
+ *
+ * @dev -Device object for our driver
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 1 if flow_ctrl_creds >0
+ * 0 - otherwise.
+ */
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return 0;
+
+ if (file_ext == NULL)
+ return 0;
+
+ if (file_ext->flow_ctrl_creds > 0)
+ return 1;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].flow_ctrl_creds > 0) {
+ BUG_ON(dev->me_clients[i].props.single_recv_buf
+ == 0);
+ return 1;
+ }
+ return 0;
+ }
+ }
+ BUG_ON(1);
+ return 0;
+}
+
+/**
+ * flow_ctrl_reduce - reduce flow_control .
+ *
+ * @dev -Device object for our driver
+ * @file_ext -extension of the file object
+ */
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ __u8 i;
+
+ if (!dev->num_heci_me_clients)
+ return;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id) {
+ if (dev->me_clients[i].props.single_recv_buf != 0) {
+ BUG_ON(dev->me_clients[i].flow_ctrl_creds <= 0);
+ dev->me_clients[i].flow_ctrl_creds--;
+ } else {
+ BUG_ON(file_ext->flow_ctrl_creds <= 0);
+ file_ext->flow_ctrl_creds--;
+ }
+ return;
+ }
+ }
+ BUG_ON(1);
+}
+
+/**
+ * heci_send_flow_control - send flow control to fw.
+ *
+ * @dev -Device object for our driver
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 1 if success
+ * 0 - otherwise.
+ */
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_flow_control *heci_flow_control;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_flow_control);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_flow_control = (struct hbm_flow_control *) &dev->wr_msg_buf[1];
+ memset(heci_flow_control, 0, sizeof(heci_flow_control));
+ heci_flow_control->host_addr = file_ext->host_client_id;
+ heci_flow_control->me_addr = file_ext->me_client_id;
+ heci_flow_control->cmd.cmd = FLOW_CONTROL_CMD;
+ memset(heci_flow_control->reserved, 0,
+ sizeof(heci_flow_control->reserved));
+ DBG("sending flow control host client = %d, me client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_flow_control,
+ sizeof(struct hbm_flow_control)))
+ return 0;
+
+ return 1;
+
+}
+
+/**
+ * other_client_is_connecting - check if other
+ * client with the same client id is connected.
+ *
+ * @dev -Device object for our driver
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 1 if other client is connected.
+ * 0 - otherwise.
+ */
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if ((file_pos->state == HECI_FILE_CONNECTING)
+ && (file_pos != file_ext)
+ && file_ext->me_client_id == file_pos->me_client_id)
+ return 1;
+
+ }
+ return 0;
+}
+
+/**
+ * heci_send_wd - send watch dog message to fw.
+ *
+ * @dev -Device object for our driver
+ *
+ * @return :
+ * 1 if success
+ * 0 - otherwise.
+ */
+int heci_send_wd(struct iamt_heci_device *dev)
+{
+ struct heci_msg_hdr *heci_hdr;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = dev->wd_file_ext.host_client_id;
+ heci_hdr->me_addr = dev->wd_file_ext.me_client_id;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ if (!memcmp(dev->wd_data, interface_start_wd_params,
+ HECI_WD_PARAMS_SIZE)) {
+ heci_hdr->length = HECI_START_WD_DATA_SIZE;
+ } else {
+ BUG_ON(memcmp(dev->wd_data, interface_stop_wd_params,
+ HECI_WD_PARAMS_SIZE));
+ heci_hdr->length = HECI_WD_PARAMS_SIZE;
+ }
+
+ if (!heci_write_message(dev, heci_hdr, dev->wd_data, heci_hdr->length))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_disconnect - send disconnect message to fw.
+ *
+ * @dev -Device object for our driver
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 1 if success
+ * 0 - otherwise.
+ */
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_disconnect_request *heci_cli_disconnect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_disconnect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_disconnect =
+ (struct hbm_client_disconnect_request *) &dev->wr_msg_buf[1];
+ memset(heci_cli_disconnect, 0, sizeof(heci_cli_disconnect));
+ heci_cli_disconnect->host_addr = file_ext->host_client_id;
+ heci_cli_disconnect->me_addr = file_ext->me_client_id;
+ heci_cli_disconnect->cmd.cmd = CLIENT_DISCONNECT_REQ_CMD;
+ heci_cli_disconnect->reserved[0] = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_disconnect,
+ sizeof(struct hbm_client_disconnect_request)))
+ return 0;
+
+ return 1;
+}
+
+/**
+ * heci_connect - send connect message to fw.
+ *
+ * @dev -Device object for our driver
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 1 if success
+ * 0 - otherwise.
+ */
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_request *heci_cli_connect;
+
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_client_connect_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ heci_cli_connect =
+ (struct hbm_client_connect_request *) &dev->wr_msg_buf[1];
+ heci_cli_connect->host_addr = file_ext->host_client_id;
+ heci_cli_connect->me_addr = file_ext->me_client_id;
+ heci_cli_connect->cmd.cmd = CLIENT_CONNECT_REQ_CMD;
+ heci_cli_connect->reserved = 0;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *) heci_cli_connect,
+ sizeof(struct hbm_client_connect_request)))
+ return 0;
+
+ return 1;
+}
diff --git a/drivers/char/heci/heci_interface.h b/drivers/char/heci/heci_interface.h
new file mode 100644
index 0000000..4081fd3
--- /dev/null
+++ b/drivers/char/heci/heci_interface.h
@@ -0,0 +1,169 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#ifndef _HECI_INTERFACE_H_
+#define _HECI_INTERFACE_H_
+
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/aio.h>
+#include <linux/types.h>
+#include "heci_data_structures.h"
+
+
+#define HBM_MINOR_VERSION 0
+#define HBM_MAJOR_VERSION 1
+#define HBM_TIMEOUT 1 /* 1 second */
+
+
+#define HOST_START_REQ_CMD 0x01
+#define HOST_START_RES_CMD 0x81
+
+#define HOST_STOP_REQ_CMD 0x02
+#define HOST_STOP_RES_CMD 0x82
+
+#define ME_STOP_REQ_CMD 0x03
+
+#define HOST_ENUM_REQ_CMD 0x04
+#define HOST_ENUM_RES_CMD 0x84
+
+#define HOST_CLIENT_PROPERTEIS_REQ_CMD 0x05
+#define HOST_CLIENT_PROPERTEIS_RES_CMD 0x85
+
+#define CLIENT_CONNECT_REQ_CMD 0x06
+#define CLIENT_CONNECT_RES_CMD 0x86
+
+#define CLIENT_DISCONNECT_REQ_CMD 0x07
+#define CLIENT_DISCONNECT_RES_CMD 0x87
+
+#define FLOW_CONTROL_CMD 0x08
+
+
+#define AMT_WD_VALUE 120 /* seconds */
+
+#define HECI_WATCHDOG_DATA_SIZE 16
+#define HECI_START_WD_DATA_SIZE 20
+#define HECI_WD_PARAMS_SIZE 4
+
+/* IOCTL commands */
+#define HECI_IOCTL_LETTER 'H'
+
+
+#define IOCTL_HECI_GET_VERSION \
+ _IOWR(HECI_IOCTL_LETTER , 0x800, struct heci_message_data)
+#define IOCTL_HECI_CONNECT_CLIENT \
+ _IOWR(HECI_IOCTL_LETTER , 0x801, struct heci_message_data)
+#define IOCTL_HECI_WD \
+ _IOWR(HECI_IOCTL_LETTER , 0x802, struct heci_message_data)
+#define IOCTL_HECI_BYPASS_WD \
+ _IOWR(HECI_IOCTL_LETTER , 0x810, struct heci_message_data)
+
+enum heci_stop_reason_types{
+ DRIVER_STOP_REQUEST = 0x00,
+ DEVICE_D1_ENTRY = 0x01,
+ DEVICE_D2_ENTRY = 0x02,
+ DEVICE_D3_ENTRY = 0x03,
+ SYSTEM_S1_ENTRY = 0x04,
+ SYSTEM_S2_ENTRY = 0x05,
+ SYSTEM_S3_ENTRY = 0x06,
+ SYSTEM_S4_ENTRY = 0x07,
+ SYSTEM_S5_ENTRY = 0x08
+};
+
+enum me_stop_reason_types{
+ FW_UPDATE = 0x00
+};
+
+enum client_connect_status_types{
+ CCS_SUCCESS = 0x00,
+ CCS_NOT_FOUND = 0x01,
+ CCS_ALREADY_STARTED = 0x02,
+ CCS_OUT_OF_RESOURCES = 0x03,
+ CCS_MESSAGE_SMALL = 0x04
+};
+
+enum client_disconnect_status_types{
+ CDS_SUCCESS = 0x00
+};
+
+
+/**
+ * heci interface function prototypes
+ */
+void heci_read_slots(struct iamt_heci_device *dev,
+ unsigned char *buffer, unsigned long buffer_length);
+
+int heci_write_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *header,
+ unsigned char *write_buffer,
+ unsigned long write_length);
+
+int host_buffer_is_empty(struct iamt_heci_device *dev);
+
+__s32 count_full_read_slots(struct iamt_heci_device *dev);
+
+__s32 count_empty_write_slots(struct iamt_heci_device *dev);
+
+int flow_ctrl_creds(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_wd(struct iamt_heci_device *dev);
+
+void flow_ctrl_reduce(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_send_flow_control(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+int heci_disconnect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int other_client_is_connecting(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+int heci_connect(struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+
+#endif /* _HECI_INTERFACE_H_ */
diff --git a/drivers/char/heci/heci_main.c b/drivers/char/heci/heci_main.c
new file mode 100644
index 0000000..608e1c7
--- /dev/null
+++ b/drivers/char/heci/heci_main.c
@@ -0,0 +1,1544 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/device.h>
+#include <linux/unistd.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+#define HECI_READ_TIMEOUT 45
+
+#define MAX_OPEN_HANDLE_COUNT 253
+
+
+#define HECI_DRIVER_NAME "heci"
+
+/**
+ * heci driver strings
+ */
+char heci_driver_name[] = HECI_DRIVER_NAME;
+char heci_driver_string[] = "Intel(R) AMT Management Interface";
+char heci_driver_version[] = DRIVER_VERSION;
+char heci_copyright[] = "Copyright (c) 2003 - 2008 Intel Corporation.";
+
+
+#ifdef HECI_DEBUG
+int heci_debug = 1;
+#else
+int heci_debug; /* initialized to 0 automatically.*/
+#endif
+MODULE_PARM_DESC(heci_debug, "Debug enabled or not");
+module_param(heci_debug, int, 0644);
+
+
+#define HECI_DEV_NAME "heci"
+
+/* heci char device for registration */
+static struct cdev heci_cdev;
+
+/* major number for device */
+static int heci_major;
+/* The device pointer */
+static struct pci_dev *heci_device;
+
+struct class *heci_class;
+struct class_device *heci_class_dev;
+
+
+/* heci_pci_tbl - PCI Device ID Table */
+static struct pci_device_id heci_pci_tbl[] = {
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID01)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID02)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID03)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID04)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID05)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID06)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID07)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID08)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID09)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID10)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID11)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID12)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID13)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID14)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID15)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID16)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID17)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID18)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID19)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID20)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID21)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_HECI_DEVICE_ID22)},
+ /* required last entry */
+ {0, }
+};
+
+MODULE_DEVICE_TABLE(pci, heci_pci_tbl);
+
+/**
+ * Local Function Prototypes
+ */
+static int __init heci_init_module(void);
+static void __exit heci_exit_module(void);
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent);
+static void __devexit heci_remove(struct pci_dev *pdev);
+static int heci_open(struct inode *inode, struct file *file);
+static int heci_release(struct inode *inode, struct file *file);
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset);
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data);
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset);
+static unsigned int heci_poll(struct file *file, poll_table *wait);
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext);
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state);
+static int heci_resume(struct pci_dev *pdev);
+static __u16 g_sus_wd_timeout;
+#endif
+/**
+ * PCI driver structure
+ */
+static struct pci_driver heci_driver = {
+ .name = heci_driver_name,
+ .id_table = heci_pci_tbl,
+ .probe = heci_probe,
+ .remove = heci_remove,
+ .shutdown = heci_remove,
+#ifdef CONFIG_PM
+ .suspend = heci_suspend,
+ .resume = heci_resume
+#endif
+};
+
+/**
+ * file operations structure will be use heci char device.
+ */
+static struct file_operations heci_fops = {
+ .owner = THIS_MODULE,
+ .read = heci_read,
+ .ioctl = heci_ioctl,
+ .open = heci_open,
+ .release = heci_release,
+ .write = heci_write,
+ .poll = heci_poll,
+};
+
+/**
+ * Set up the cdev structure for heci device.
+ * @dev - char device struct
+ * @hminor - minor number for registration char device
+ * @fops - file operations structure
+ * @return :
+ * 0 on success,
+ * negative on failure
+ */
+static int heci_registration_cdev(struct cdev *dev, int hminor,
+ struct file_operations *fops)
+{
+ int ret = 0, devno = MKDEV(heci_major, hminor);
+
+ cdev_init(dev, fops);
+ dev->owner = THIS_MODULE;
+ dev->ops = fops;
+ ret = cdev_add(dev, devno, 1);
+ /* Fail gracefully if need be */
+ if (ret) {
+ kobject_put(&dev->kobj);
+ printk(KERN_ERR "%s: Error %d registering heci device %d\n",
+ THIS_MODULE->name, ret, hminor);
+ }
+ return ret;
+}
+
+/* Display the version of heci driver. */
+static ssize_t version_show(struct class *dev, char *buf)
+{
+ return sprintf(buf, "%s %s.\n",
+ heci_driver_string, heci_driver_version);
+}
+
+static CLASS_ATTR(version, S_IRUGO, version_show, NULL);
+
+/**
+ * heci_sysfs_create - creates a struct class to contain heci info
+ * @owner - pointer to the module that is to "own" heci sysfs class
+ * @name - pointer to a string for the name of this class
+ *
+ * @return :
+ * valid pointer to a struct class on success
+ * false pointer on failure
+ */
+static struct class *heci_sysfs_create(struct module *owner, char *name)
+{
+ struct class *class;
+ int err = 0;
+
+ class = class_create(owner, name);
+ if (IS_ERR(class)) {
+ err = PTR_ERR(class);
+ goto error;
+ }
+
+ err = class_create_file(class, &class_attr_version);
+ if (err)
+ goto destroy_class;
+
+ return class;
+
+destroy_class:
+ class_destroy(class);
+error:
+ return ERR_PTR(err);
+}
+
+/**
+ * heci_sysfs_destroy - destroys a struct class of heci info
+ *
+ * @cs - pointer to the struct class that is to be destroyed
+ */
+static void heci_sysfs_destroy(struct class *class)
+{
+ if ((class == NULL) || (IS_ERR(class)))
+ return;
+
+ class_remove_file(class, &class_attr_version);
+ class_destroy(class);
+}
+
+/**
+ * heci_sysfs_device_create - adds two devices to sysfs for chararcter devices
+ * @cs - pointer to the struct class that the device to be registered on
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure
+ */
+static int heci_sysfs_device_create(struct class *cs)
+{
+ int err = 0;
+
+ if ((cs == NULL) || (IS_ERR(cs))) {
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ heci_class_dev = class_device_create(cs, NULL,
+ heci_cdev.dev,
+ NULL,
+ HECI_DEV_NAME);
+ if (IS_ERR(heci_class_dev))
+ err = PTR_ERR(heci_class_dev);
+
+err_out:
+ return err;
+}
+
+/**
+ * heci_sysfs_device_remove - unregisters the two device entries on sysfs
+ */
+static void heci_sysfs_device_remove(void)
+{
+ if (heci_class_dev)
+ class_device_unregister(heci_class_dev);
+}
+
+/**
+ * heci_init_module - Driver Registration Routine
+ *
+ * heci_init_module is the first routine called when the driver is
+ * loaded. All it does is register with the PCI subsystem.
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure
+ */
+static int __init heci_init_module(void)
+{
+ int ret = 0;
+ dev_t dev;
+
+ printk(KERN_INFO "%s: %s - version %s\n",
+ THIS_MODULE->name, heci_driver_string, heci_driver_version);
+ printk(KERN_INFO "%s: %s\n", THIS_MODULE->name, heci_copyright);
+
+ /* init pci module */
+ ret = pci_register_driver(&heci_driver);
+ if (ret < 0)
+ goto end;
+
+ /* registration char devices */
+ ret = alloc_chrdev_region(&dev, HECI_MINORS_BASE, HECI_MINORS_COUNT,
+ HECI_DRIVER_NAME);
+
+ heci_major = MAJOR(dev);
+
+ /* rgisteration in sysfs interface */
+ heci_class = heci_sysfs_create(THIS_MODULE, HECI_DRIVER_NAME);
+ if (IS_ERR(heci_class)) {
+ printk(KERN_ERR "%s: Error creating heci class.\n",
+ THIS_MODULE->name);
+ ret = PTR_ERR(heci_class);
+ goto unregister;
+ }
+
+ ret = heci_registration_cdev(&heci_cdev, HECI_MINOR_NUMBER,
+ &heci_fops);
+ if (ret)
+ goto destroy_sysfs;
+
+ if (heci_sysfs_device_create(heci_class)) {
+ cdev_del(&heci_cdev);
+ ret = -EAGAIN;
+ goto destroy_sysfs;
+ }
+
+ return ret;
+
+destroy_sysfs:
+ heci_sysfs_destroy(heci_class);
+
+unregister:
+ pci_unregister_driver(&heci_driver);
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+end:
+ return ret;
+}
+
+module_init(heci_init_module);
+
+
+/**
+ * heci_exit_module - Driver Exit Cleanup Routine
+ *
+ * heci_exit_module is called just before the driver is removed
+ * from memory.
+ */
+static void __exit heci_exit_module(void)
+{
+ pci_unregister_driver(&heci_driver);
+ /* Now unregister two cdevs. */
+ cdev_del(&heci_cdev);
+
+ heci_sysfs_device_remove();
+ heci_sysfs_destroy(heci_class);
+ unregister_chrdev_region(MKDEV(heci_major, HECI_MINORS_BASE),
+ HECI_MINORS_COUNT);
+}
+
+module_exit(heci_exit_module);
+
+
+/**
+ * heci_probe - Device Initialization Routine
+ *
+ * @pdev: PCI device information struct
+ * @ent: entry in kcs_pci_tbl
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure
+ */
+static int __devinit heci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct iamt_heci_device *dev = NULL;
+ int i, err = 0;
+
+ if (heci_device) {
+ err = -EEXIST;
+ goto end;
+ }
+ /* enable pci dev */
+ err = pci_enable_device(pdev);
+ if (err) {
+ printk(KERN_ERR "%s: Failed to enable pci device.\n",
+ THIS_MODULE->name);
+ goto end;
+ }
+ /* set PCI host mastering */
+ pci_set_master(pdev);
+ /* pci request regions for heci driver */
+ err = pci_request_regions(pdev, heci_driver_name);
+ if (err) {
+ printk(KERN_ERR "%s: Failed to get pci regions.\n",
+ THIS_MODULE->name);
+ goto disable_device;
+ }
+ /* allocates and initializes the heci dev structure */
+ dev = init_heci_device(pdev);
+ if (!dev) {
+ err = -ENOMEM;
+ goto release_regions;
+ }
+ /* mapping IO device memory */
+ for (i = BAR_0; i <= BAR_5; i++) {
+ if (pci_resource_len(pdev, i) == 0)
+ continue;
+ if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
+ printk(KERN_ERR "%s: heci has an IO ports.\n",
+ THIS_MODULE->name);
+ goto free_device;
+ } else if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
+ if (dev->mem_base) {
+ printk(KERN_ERR "%s: Too many mem addresses.\n",
+ THIS_MODULE->name);
+ goto free_device;
+ }
+ dev->mem_base = pci_resource_start(pdev, i);
+ dev->mem_length = pci_resource_len(pdev, i);
+ }
+ }
+ if (!dev->mem_base) {
+ printk(KERN_ERR "%s: No address to use.\n", THIS_MODULE->name);
+ err = -ENODEV;
+ goto free_device;
+ }
+ dev->mem_addr = ioremap_nocache(dev->mem_base,
+ dev->mem_length);
+ if (!dev->mem_addr) {
+ printk(KERN_ERR "%s: Remap IO device memory failure.\n",
+ THIS_MODULE->name);
+ err = -ENOMEM;
+ goto free_device;
+ }
+ /* request and enable interrupt */
+ dev->irq = pdev->irq;
+ err = request_irq(dev->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, dev);
+ if (err) {
+ printk(KERN_ERR "%s: Request_irq failure. irq = %d \n",
+ THIS_MODULE->name, dev->irq);
+ goto unmap_memory;
+ }
+
+ if (heci_hw_init(dev)) {
+ printk(KERN_ERR "%s: Init hw failure.\n", THIS_MODULE->name);
+ err = -ENODEV;
+ goto release_irq;
+ }
+ init_timer(&dev->wd_timer);
+ msleep(100); /* FW needs time to be ready to talk with us */
+ heci_initialize_clients(dev);
+ if (dev->heci_state != HECI_ENABLED) {
+ err = -ENODEV;
+ goto release_hw;
+ }
+ spin_lock_bh(&dev->device_lock);
+ heci_device = pdev;
+ pci_set_drvdata(pdev, dev);
+ spin_unlock_bh(&dev->device_lock);
+ if (dev->wd_timeout)
+ mod_timer(&dev->wd_timer, jiffies);
+
+
+#ifdef CONFIG_PM
+ g_sus_wd_timeout = 0;
+#endif
+ printk(KERN_INFO "%s: heci driver initialization successful.\n",
+ THIS_MODULE->name);
+ return 0;
+
+release_hw:
+ /* disable interrupts */
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->host_hw_state &= ~H_IE;
+ /* acknowledge interrupt and stop interupts */
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+
+ del_timer_sync(&dev->wd_timer);
+
+
+ flush_scheduled_work();
+
+release_irq:
+ free_irq(pdev->irq, dev);
+unmap_memory:
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+free_device:
+ kfree(dev);
+release_regions:
+ pci_release_regions(pdev);
+disable_device:
+ pci_disable_device(pdev);
+end:
+ printk(KERN_ERR "%s: heci driver initialization failed.\n",
+ THIS_MODULE->name);
+ return err;
+}
+
+/**
+ * heci_remove - Device Removal Routine
+ * @pdev: PCI device information struct
+ *
+ * heci_remove is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.
+ */
+static void __devexit heci_remove(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *dev = pci_get_drvdata(pdev);
+ int err = 0;
+
+ if (heci_device != pdev)
+ return;
+
+ if (dev == NULL)
+ return;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->reinit_tsk != NULL) {
+ kthread_stop(dev->reinit_tsk);
+ dev->reinit_tsk = NULL;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ del_timer_sync(&dev->wd_timer);
+ if (dev->wd_file_ext.state == HECI_FILE_CONNECTED
+ && dev->wd_timeout) {
+ spin_lock_bh(&dev->device_lock);
+ dev->wd_timeout = 0;
+ dev->wd_due_counter = 0;
+ memcpy(dev->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
+ dev->stop = 1;
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+
+ if (!heci_send_wd(dev))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+ } else {
+ dev->wd_pending = 1;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ dev->wd_stoped = 0;
+
+ err = wait_event_interruptible_timeout(dev->wait_stop_wd,
+ (dev->wd_stoped), 10 * HZ);
+ if (!dev->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else
+ DBG("stop wd complete.\n");
+
+ }
+
+ heci_device = NULL;
+ if (dev->iamthif_file_ext.status == HECI_FILE_CONNECTED) {
+ dev->iamthif_file_ext.status = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->iamthif_file_ext);
+ }
+ if (dev->wd_file_ext.status == HECI_FILE_CONNECTED) {
+ dev->wd_file_ext.status = HECI_FILE_DISCONNECTING;
+ heci_disconnect_host_client(dev,
+ &dev->wd_file_ext);
+ }
+
+ spin_lock_bh(&dev->device_lock);
+
+ /* remove entry if already in list */
+ DBG("list del iamthif and wd file list.\n");
+ heci_remove_client_from_file_list(dev, dev->wd_file_ext.
+ host_client_id);
+ heci_remove_client_from_file_list(dev,
+ dev->iamthif_file_ext.host_client_id);
+
+ dev->iamthif_current_cb = NULL;
+ dev->iamthif_file_ext.file = NULL;
+ dev->num_heci_me_clients = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ flush_scheduled_work();
+ /* disable interrupts */
+ dev->host_hw_state &= ~H_IE;
+ /* acknowledge interrupt and stop interupts */
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ free_irq(pdev->irq, dev);
+ pci_set_drvdata(pdev, NULL);
+
+ if (dev->mem_addr)
+ iounmap(dev->mem_addr);
+
+ kfree(dev);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+}
+
+/**
+ * heci_clear_list - remove all callbacks associated with file
+ * from heci_cb_list
+ * @file: file informtion struct
+ * @heci_cb_list: callbacks list
+ * heci_clear_list is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * @return :1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_list(struct iamt_heci_device *dev,
+ struct file *file, struct list_head *heci_cb_list)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private*priv_cb_next = NULL;
+ struct file *file_temp = NULL;
+ int rets = 0;
+
+ /* list all list member */
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ heci_cb_list, cb_list) {
+ file_temp = (struct file *)priv_cb_pos->file_object;
+ /* check if list member associated with a file */
+ if (file_temp == file) {
+ /* remove member from the list */
+ list_del(&priv_cb_pos->cb_list);
+ /* check if cb equal to current iamthif cb */
+ if (dev->iamthif_current_cb == priv_cb_pos) {
+ dev->iamthif_current_cb = NULL;
+ /* send flow control to iamthif client */
+ heci_send_flow_control(dev,
+ &dev->iamthif_file_ext);
+ }
+ /* free all allocated buffers */
+ heci_free_cb_private(priv_cb_pos);
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_clear_lists - remove all callbacks associated with file
+ * @device: dev informtion struct
+ * @file: file informtion struct
+ * heci_clear_lists is called to clear resources associated with file
+ * when application calls close function or Ctrl-C was pressed
+ *
+ * @return :1 if callback removed from the list, 0 otherwise
+ */
+static int heci_clear_lists(struct iamt_heci_device *dev, struct file *file)
+{
+ int rets = 0;
+
+ /* remove callbacks associated with a file */
+ heci_clear_list(dev, file, &dev->pthi_cmd_list.heci_cb.cb_list);
+ if (heci_clear_list(dev, file,
+ &dev->pthi_read_complete_list.heci_cb.cb_list))
+ rets = 1;
+
+ heci_clear_list(dev, file, &dev->ctrl_rd_list.heci_cb.cb_list);
+
+ if (heci_clear_list(dev, file, &dev->ctrl_wr_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file,
+ &dev->write_waiting_list.heci_cb.cb_list))
+ rets = 1;
+
+ if (heci_clear_list(dev, file, &dev->write_list.heci_cb.cb_list))
+ rets = 1;
+
+ /* check if iamthif_current_cb not NULL */
+ if (dev->iamthif_current_cb && (!rets)) {
+ /* check file and iamthif current cb association */
+ if (dev->iamthif_current_cb->file_object == file) {
+ /* remove cb */
+ heci_free_cb_private(dev->iamthif_current_cb);
+ dev->iamthif_current_cb = NULL;
+ rets = 1;
+ }
+ }
+ return rets;
+}
+
+/**
+ * heci_open - the open function
+ */
+static int heci_open(struct inode *inode, struct file *file)
+{
+ struct heci_file_private *file_ext = NULL;
+ int if_num = MINOR(inode->i_rdev);
+ struct iamt_heci_device *dev = NULL;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ file_ext = alloc_priv(file);
+ if (!file_ext)
+ return -ENOMEM;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENODEV;
+ }
+ if (dev->open_handle_count >= MAX_OPEN_HANDLE_COUNT) {
+ spin_unlock_bh(&dev->device_lock);
+ kfree(file_ext);
+ return -ENFILE;
+ };
+ dev->open_handle_count++;
+ list_add_tail(&file_ext->link, &dev->file_list);
+ while ((dev->heci_host_clients[dev->current_host_client_id / 8]
+ & (1 << (dev->current_host_client_id % 8))) != 0) {
+
+ dev->current_host_client_id++; /* allow overflow */
+ DBG("current_host_client_id = %d\n",
+ dev->current_host_client_id);
+ DBG("dev->open_handle_count = %lu\n",
+ dev->open_handle_count);
+ }
+ DBG("current_host_client_id = %d\n", dev->current_host_client_id);
+ file_ext->host_client_id = dev->current_host_client_id;
+ dev->heci_host_clients[file_ext->host_client_id / 8] |=
+ (1 << (file_ext->host_client_id % 8));
+ spin_unlock_bh(&dev->device_lock);
+ spin_lock(&file_ext->file_lock);
+ file_ext->state = HECI_FILE_INITIALIZING;
+ file_ext->sm_state = 0;
+
+ file->private_data = file_ext;
+ spin_unlock(&file_ext->file_lock);
+
+ return 0;
+}
+
+/**
+ * heci_release - the release function
+ */
+static int heci_release(struct inode *inode, struct file *file)
+{
+ int rets = 0;
+ int if_num = MINOR(inode->i_rdev);
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev = NULL;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ if (file_ext != &dev->iamthif_file_ext) {
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state == HECI_FILE_CONNECTED) {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ spin_unlock(&file_ext->file_lock);
+ DBG("disconnecting client host client = %d, "
+ "ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+ rets = heci_disconnect_host_client(dev, file_ext);
+ spin_lock(&file_ext->file_lock);
+ }
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_queues(dev, file_ext);
+ DBG("remove client host client = %d, ME client = %d\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ if (dev->open_handle_count > 0) {
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ dev->open_handle_count--;
+ }
+ heci_remove_client_from_file_list(dev,
+ file_ext->host_client_id);
+
+ /* free read cb */
+ if (file_ext->read_cb != NULL) {
+ priv_cb = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb != NULL)
+ list_del(&priv_cb->cb_list);
+
+ priv_cb = file_ext->read_cb;
+ file_ext->read_cb = NULL;
+ }
+
+ spin_unlock_bh(&dev->device_lock);
+ file->private_data = NULL;
+ spin_unlock(&file_ext->file_lock);
+
+ if (priv_cb != NULL)
+ heci_free_cb_private(priv_cb);
+
+ kfree(file_ext);
+ } else {
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->open_handle_count > 0)
+ dev->open_handle_count--;
+
+ if (dev->iamthif_file_object == file
+ && dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi canceled iamthif state %d\n",
+ dev->iamthif_state);
+ dev->iamthif_canceled = 1;
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE) {
+ DBG("run next pthi iamthif cb\n");
+ run_next_iamthif_cmd(dev);
+ }
+ }
+
+ if (heci_clear_lists(dev, file))
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+
+ spin_unlock_bh(&dev->device_lock);
+ }
+ return rets;
+}
+
+static struct heci_cb_private *find_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct heci_file_private *file_ext)
+{
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ struct heci_file_private *file_ext_list_temp = NULL;
+
+ if (dev->read_list.status == 0
+ && !list_empty(&dev->read_list.heci_cb.cb_list)) {
+ DBG("remove read_list CB \n");
+ list_for_each_entry_safe(priv_cb_pos,
+ priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+
+ file_ext_list_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (file_ext_list_temp &&
+ heci_fe_same_id(file_ext, file_ext_list_temp))
+ return priv_cb_pos;
+
+ }
+ }
+ return NULL;
+}
+
+/**
+ * heci_read - the read client message function.
+ */
+static ssize_t heci_read(struct file *file, char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int i;
+ int rets = 0, err = 0;
+ int if_num = MINOR((file->f_dentry->d_inode->i_rdev));
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb = NULL;
+ struct iamt_heci_device *dev = NULL;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ spin_lock(&file_ext->file_lock);
+ if ((file_ext->sm_state & HECI_WD_STATE_INDEPENDENCE_MSG_SENT) == 0) {
+ spin_unlock(&file_ext->file_lock);
+ /* Do not allow to read watchdog client */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp(&heci_wd_guid,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (file_ext->me_client_id ==
+ dev->me_clients[i].client_id)
+ return -EBADF;
+ }
+ }
+ } else {
+ file_ext->sm_state &= ~HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+ }
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ rets = pthi_read(dev, if_num, file, ubuf, length, offset);
+ goto out;
+ }
+
+ if (file_ext->read_cb && file_ext->read_cb->information > *offset) {
+ priv_cb = file_ext->read_cb;
+ goto copy_buffer;
+ } else if (file_ext->read_cb && file_ext->read_cb->information > 0 &&
+ file_ext->read_cb->information <= *offset) {
+ priv_cb = file_ext->read_cb;
+ rets = 0;
+ goto free;
+ } else if ((!file_ext->read_cb || file_ext->read_cb->information == 0)
+ && *offset > 0) {
+ /*Offset needs to be cleaned for contingous reads*/
+ *offset = 0;
+ rets = 0;
+ goto out;
+ }
+
+ spin_lock(&file_ext->read_io_lock);
+ err = heci_start_read(dev, if_num, file_ext);
+ if (err != 0 && err != -EBUSY) {
+ DBG("heci start read failure with status = %d\n", err);
+ spin_unlock(&file_ext->read_io_lock);
+ rets = err;
+ goto out;
+ }
+ if (HECI_READ_COMPLETE != file_ext->reading_state
+ && !waitqueue_active(&file_ext->rx_wait)) {
+ if (file->f_flags & O_NONBLOCK) {
+ rets = -EAGAIN;
+ spin_unlock(&file_ext->read_io_lock);
+ goto out;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+
+ if (wait_event_interruptible(file_ext->rx_wait,
+ (HECI_READ_COMPLETE == file_ext->reading_state
+ || HECI_FILE_INITIALIZING == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTING == file_ext->state))) {
+ if (signal_pending(current)) {
+ rets = -EINTR;
+ goto out;
+ }
+ return -ERESTARTSYS;
+ }
+
+ if (HECI_FILE_INITIALIZING == file_ext->state ||
+ HECI_FILE_DISCONNECTED == file_ext->state ||
+ HECI_FILE_DISCONNECTING == file_ext->state) {
+ rets = -EBUSY;
+ goto out;
+ }
+ spin_lock(&file_ext->read_io_lock);
+ }
+
+ priv_cb = file_ext->read_cb;
+
+ if (!priv_cb) {
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENODEV;
+ }
+ if (file_ext->reading_state != HECI_READ_COMPLETE) {
+ spin_unlock(&file_ext->read_io_lock);
+ return 0;
+ }
+ spin_unlock(&file_ext->read_io_lock);
+ /* now copy the data to user space */
+copy_buffer:
+ DBG("priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("priv_cb->information - %lu\n",
+ priv_cb->information);
+ if (length == 0 || ubuf == NULL ||
+ *offset > priv_cb->information) {
+ rets = -EMSGSIZE;
+ goto free;
+ }
+
+ /* length is being turncated to PAGE_SIZE, however, */
+ /* information size may be longer */
+ length = (length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset));
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length)) {
+ rets = -EFAULT;
+ goto free;
+ } else {
+ rets = length;
+ *offset += length;
+ if ((unsigned long)*offset < priv_cb->information)
+ goto out;
+ }
+free:
+ spin_lock_bh(&dev->device_lock);
+ priv_cb_pos = find_read_list_entry(dev, file_ext);
+ /* Remove entry from read list */
+ if (priv_cb_pos != NULL)
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_cb);
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+out: DBG("end heci read rets= %d\n", rets);
+ return rets;
+}
+
+/**
+ * heci_write - the write function.
+ */
+static ssize_t heci_write(struct file *file, const char __user *ubuf,
+ size_t length, loff_t *offset)
+{
+ int rets = 0;
+ __u8 i;
+ int if_num = MINOR((file->f_dentry->d_inode->i_rdev));
+ struct heci_file_private *file_ext = file->private_data;
+ struct heci_cb_private *priv_write_cb = NULL;
+ struct heci_msg_hdr heci_hdr;
+ struct iamt_heci_device *dev = NULL;
+ unsigned long currtime = get_seconds();
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb = find_pthi_read_list_entry(dev, file, file_ext);
+ if ((priv_write_cb) &&
+ (((currtime - priv_write_cb->read_time) >
+ IAMTHIF_READ_TIMER) ||
+ (file_ext->reading_state == HECI_READ_COMPLETE))) {
+ (*offset) = 0;
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ }
+ }
+
+ /* free entry used in read */
+ if (file_ext->reading_state == HECI_READ_COMPLETE) {
+ *offset = 0;
+ priv_write_cb = find_read_list_entry(dev, file_ext);
+ if (priv_write_cb != NULL) {
+ list_del(&priv_write_cb->cb_list);
+ heci_free_cb_private(priv_write_cb);
+ priv_write_cb = NULL;
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_IDLE;
+ file_ext->read_cb = NULL;
+ file_ext->read_pending = 0;
+ spin_unlock(&file_ext->read_io_lock);
+ }
+ } else if (file_ext->reading_state == HECI_IDLE &&
+ file_ext->read_pending == 0)
+ (*offset) = 0;
+
+ spin_unlock_bh(&dev->device_lock);
+
+ priv_write_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_write_cb)
+ return -ENOMEM;
+
+ priv_write_cb->file_object = file;
+ priv_write_cb->file_private = file_ext;
+ priv_write_cb->request_buffer.data = kmalloc(length, GFP_KERNEL);
+ if (!priv_write_cb->request_buffer.data) {
+ kfree(priv_write_cb);
+ return -ENOMEM;
+ }
+ DBG("length =%d\n", (int) length);
+
+ if (copy_from_user(priv_write_cb->request_buffer.data,
+ ubuf, length)) {
+ rets = -EFAULT;
+ goto fail;
+ }
+
+ spin_lock(&file_ext->file_lock);
+ file_ext->sm_state = 0;
+ if ((length == 4) &&
+ ((memcmp(heci_wd_state_independence_msg[0], ubuf, 4) == 0) ||
+ (memcmp(heci_wd_state_independence_msg[1], ubuf, 4) == 0)))
+ file_ext->sm_state |= HECI_WD_STATE_INDEPENDENCE_MSG_SENT;
+ spin_unlock(&file_ext->file_lock);
+
+ INIT_LIST_HEAD(&priv_write_cb->cb_list);
+ if (file_ext == &dev->iamthif_file_ext) {
+ priv_write_cb->response_buffer.data =
+ kmalloc(IAMTHIF_MTU, GFP_KERNEL);
+ if (!priv_write_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->iamthif_file_ext.me_client_id)
+ break;
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients) ||
+ (dev->me_clients[i].client_id !=
+ dev->iamthif_file_ext.me_client_id)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ } else if ((length > dev->me_clients[i].props.max_msg_length)
+ || (length <= 0)) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -EMSGSIZE;
+ goto fail;
+ }
+
+
+ priv_write_cb->response_buffer.size = IAMTHIF_MTU;
+ priv_write_cb->major_file_operations = HECI_IOCTL;
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ENODEV;
+ goto fail;
+ }
+
+ if (!list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)
+ || dev->iamthif_state != HECI_IAMTHIF_IDLE) {
+ DBG("pthi_state = %d\n", (int) dev->iamthif_state);
+ DBG("add PTHI cb to pthi cmd waiting list\n");
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->pthi_cmd_list.heci_cb.cb_list);
+ rets = length;
+ } else {
+ DBG("call pthi write\n");
+ rets = pthi_write(dev, priv_write_cb);
+
+ if (rets != 0) {
+ DBG("pthi write failed with status = %d\n",
+ rets);
+ spin_unlock_bh(&dev->device_lock);
+ goto fail;
+ }
+ rets = length;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+ }
+
+ priv_write_cb->major_file_operations = HECI_WRITE;
+ /* make sure information is zero before we start */
+
+ priv_write_cb->information = 0;
+ priv_write_cb->request_buffer.size = length;
+
+ spin_lock(&file_ext->write_io_lock);
+ DBG("host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ if (file_ext->state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ DBG("host client = %d, is not connected to ME client = %d",
+ file_ext->host_client_id,
+ file_ext->me_client_id);
+
+ goto unlock;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ file_ext->me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if (i == dev->num_heci_me_clients) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+ if (length > dev->me_clients[i].props.max_msg_length || length <= 0) {
+ rets = -EINVAL;
+ goto unlock;
+ }
+ priv_write_cb->file_private = file_ext;
+
+ spin_lock_bh(&dev->device_lock);
+ if (flow_ctrl_creds(dev, file_ext) &&
+ dev->host_buffer_is_empty) {
+ spin_unlock_bh(&dev->device_lock);
+ dev->host_buffer_is_empty = 0;
+ if (length > ((((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr))) {
+
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) -
+ sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = length;
+ heci_hdr.msg_complete = 1;
+ }
+ heci_hdr.host_addr = file_ext->host_client_id;
+ heci_hdr.me_addr = file_ext->me_client_id;
+ heci_hdr.reserved = 0;
+ DBG("call heci_write_message header=%08x.\n",
+ *((__u32 *) &heci_hdr));
+ spin_unlock(&file_ext->write_io_lock);
+ /* protect heci low level write */
+ spin_lock_bh(&dev->device_lock);
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *) (priv_write_cb->request_buffer.data),
+ heci_hdr.length)) {
+
+ spin_unlock_bh(&dev->device_lock);
+ heci_free_cb_private(priv_write_cb);
+ rets = -ENODEV;
+ priv_write_cb->information = 0;
+ return rets;
+ }
+ file_ext->writing_state = HECI_WRITING;
+ priv_write_cb->information = heci_hdr.length;
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, file_ext);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ } else {
+
+ spin_unlock_bh(&dev->device_lock);
+ priv_write_cb->information = 0;
+ file_ext->writing_state = HECI_WRITING;
+ spin_unlock(&file_ext->write_io_lock);
+ list_add_tail(&priv_write_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return length;
+
+unlock:
+ spin_unlock(&file_ext->write_io_lock);
+fail:
+ heci_free_cb_private(priv_write_cb);
+ return rets;
+
+}
+
+/**
+ * heci_ioctl - the IOCTL function
+ */
+static int heci_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long data)
+{
+ int rets = 0;
+ int if_num = MINOR(inode->i_rdev);
+ struct heci_file_private *file_ext = file->private_data;
+ /* in user space */
+ struct heci_message_data *u_msg = (struct heci_message_data *) data;
+ struct heci_message_data k_msg; /* all in kernel on the stack */
+ struct iamt_heci_device *dev = NULL;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (!heci_device)
+ return -ENODEV;
+
+ dev = pci_get_drvdata(heci_device);
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ /* first copy from user all data needed */
+ if (copy_from_user(&k_msg, u_msg, sizeof(k_msg))) {
+ DBG("first copy from user all data needed filled\n");
+ return -EFAULT;
+ }
+ DBG("user message size is %d\n", k_msg.size);
+
+ switch (cmd) {
+ case IOCTL_HECI_GET_VERSION:
+ DBG(": IOCTL_HECI_GET_VERSION\n");
+ rets = heci_ioctl_get_version(dev, if_num, u_msg, k_msg,
+ file_ext);
+ break;
+
+ case IOCTL_HECI_CONNECT_CLIENT:
+ DBG(": IOCTL_HECI_CONNECT_CLIENT.\n");
+ rets = heci_ioctl_connect_client(dev, if_num, u_msg, k_msg,
+ file);
+ break;
+
+ case IOCTL_HECI_WD:
+ DBG(": IOCTL_HECI_WD.\n");
+ rets = heci_ioctl_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ case IOCTL_HECI_BYPASS_WD:
+ DBG(": IOCTL_HECI_BYPASS_WD.\n");
+ rets = heci_ioctl_bypass_wd(dev, if_num, k_msg, file_ext);
+ break;
+
+ default:
+ rets = -EINVAL;
+ break;
+ }
+ return rets;
+}
+
+/**
+ * heci_poll - the poll function
+ */
+static unsigned int heci_poll(struct file *file, poll_table *wait)
+{
+ int if_num = MINOR((file->f_dentry->d_inode->i_rdev));
+ unsigned int mask = 0;
+ struct heci_file_private *file_ext = file->private_data;
+ struct iamt_heci_device *dev = NULL;
+
+ if (!heci_device)
+ return mask;
+
+ dev = pci_get_drvdata(heci_device);
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext))
+ return mask;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return mask;
+ }
+ spin_unlock_bh(&dev->device_lock);
+
+ if (file_ext == &dev->iamthif_file_ext) {
+ poll_wait(file, &dev->iamthif_file_ext.wait, wait);
+ spin_lock(&dev->iamthif_file_ext.file_lock);
+ if (dev->iamthif_state == HECI_IAMTHIF_READ_COMPLETE
+ && dev->iamthif_file_object == file) {
+ mask |= (POLLIN | POLLRDNORM);
+ spin_lock_bh(&dev->device_lock);
+ DBG("run next pthi cb\n");
+ run_next_iamthif_cmd(dev);
+ spin_unlock_bh(&dev->device_lock);
+ }
+ spin_unlock(&dev->iamthif_file_ext.file_lock);
+
+ } else{
+ poll_wait(file, &file_ext->tx_wait, wait);
+ spin_lock(&file_ext->write_io_lock);
+ if (HECI_WRITE_COMPLETE == file_ext->writing_state)
+ mask |= (POLLIN | POLLRDNORM);
+
+ spin_unlock(&file_ext->write_io_lock);
+ }
+
+ return mask;
+}
+
+#ifdef CONFIG_PM
+static int heci_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct iamt_heci_device *device = pci_get_drvdata(pdev);
+ int err = 0;
+
+ spin_lock_bh(&device->device_lock);
+ if (device->reinit_tsk != NULL) {
+ kthread_stop(device->reinit_tsk);
+ device->reinit_tsk = NULL;
+ }
+ spin_unlock_bh(&device->device_lock);
+
+ /* Stop watchdog if exists */
+ del_timer_sync(&device->wd_timer);
+ if (device->wd_file_ext.state == HECI_FILE_CONNECTED
+ && device->wd_timeout) {
+ spin_lock_bh(&device->device_lock);
+ g_sus_wd_timeout = device->wd_timeout;
+ device->wd_timeout = 0;
+ device->wd_due_counter = 0;
+ memcpy(device->wd_data, stop_wd_params, HECI_WD_PARAMS_SIZE);
+ device->stop = 1;
+ if (device->host_buffer_is_empty &&
+ flow_ctrl_creds(device, &device->wd_file_ext)) {
+ device->host_buffer_is_empty = 0;
+ if (!heci_send_wd(device))
+ DBG("send stop WD failed\n");
+ else
+ flow_ctrl_reduce(device, &device->wd_file_ext);
+
+ device->wd_pending = 0;
+ } else {
+ device->wd_pending = 1;
+ }
+ spin_unlock_bh(&device->device_lock);
+ device->wd_stoped = 0;
+
+ err = wait_event_interruptible_timeout(device->wait_stop_wd,
+ (device->wd_stoped),
+ 10 * HZ);
+ if (!device->wd_stoped)
+ DBG("stop wd failed to complete.\n");
+ else {
+ DBG("stop wd complete %d.\n", err);
+ err = 0;
+ }
+ }
+ /* Set new heci state */
+ spin_lock_bh(&device->device_lock);
+ if (device->heci_state == HECI_ENABLED ||
+ device->heci_state == HECI_RECOVERING_FROM_RESET) {
+ device->heci_state = HECI_POWER_DOWN;
+ heci_reset(device, 0);
+ }
+ spin_unlock_bh(&device->device_lock);
+
+ pci_save_state(pdev);
+
+ pci_disable_device(pdev);
+ free_irq(pdev->irq, device);
+
+ pci_set_power_state(pdev, PCI_D3hot);
+
+ return err;
+}
+
+static int heci_resume(struct pci_dev *pdev)
+{
+ struct iamt_heci_device *device = NULL;
+ int err = 0;
+
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+
+ device = pci_get_drvdata(pdev);
+ if (!device)
+ return -ENODEV;
+
+ /* request and enable interrupt */
+ device->irq = pdev->irq;
+ err = request_irq(device->irq, heci_isr_interrupt, IRQF_SHARED,
+ heci_driver_name, device);
+ if (err) {
+ printk(KERN_ERR "%s: Request_irq failure. irq = %d \n",
+ THIS_MODULE->name, device->irq);
+ return err;
+ }
+
+ spin_lock_bh(&device->device_lock);
+ device->heci_state = HECI_POWER_UP;
+ heci_reset(device, 1);
+ spin_unlock_bh(&device->device_lock);
+
+ /* Start watchdog if stopped in suspend */
+ if (g_sus_wd_timeout != 0) {
+ device->wd_timeout = g_sus_wd_timeout;
+
+ memcpy(device->wd_data, start_wd_params, HECI_WD_PARAMS_SIZE);
+ memcpy(device->wd_data + HECI_WD_PARAMS_SIZE,
+ &device->wd_timeout, sizeof(__u16));
+ device->wd_due_counter = 1;
+
+ if (device->wd_timeout)
+ mod_timer(&device->wd_timer, jiffies);
+
+ g_sus_wd_timeout = 0;
+ }
+ return err;
+}
+#endif
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) AMT Management Interface");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(DRIVER_VERSION);
diff --git a/drivers/char/heci/heci_version.h b/drivers/char/heci/heci_version.h
new file mode 100644
index 0000000..6cbb5e2
--- /dev/null
+++ b/drivers/char/heci/heci_version.h
@@ -0,0 +1,56 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#ifndef HECI_VERSION_H
+#define HECI_VERSION_H
+
+#define MAJOR_VERSION 5
+#define MINOR_VERSION 0
+#define QUICK_FIX_NUMBER 0
+#define VER_BUILD 1
+
+#define str(s) name(s)
+#define name(s) #s
+#define DRIVER_V1 str(MAJOR_VERSION) "." str(MINOR_VERSION)
+#define DRIVER_V2 str(QUICK_FIX_NUMBER) "." str(VER_BUILD)
+
+#define DRIVER_VERSION DRIVER_V1 "." DRIVER_V2
+
+#endif
diff --git a/drivers/char/heci/interrupt.c b/drivers/char/heci/interrupt.c
new file mode 100644
index 0000000..c2fc1d0
--- /dev/null
+++ b/drivers/char/heci/interrupt.c
@@ -0,0 +1,1551 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/kthread.h>
+
+#include "heci.h"
+#include "heci_interface.h"
+
+/**
+ * interrupt function prototypes
+ */
+static void heci_bh_handler(struct work_struct *work);
+static int heci_bh_read_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static int heci_bh_write_handler(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots);
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr);
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *connect_res);
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *disconnect_res);
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control);
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req);
+
+
+/**
+ * heci_isr_interrupt - The ISR of the HECI device
+ * @irq: The irq number
+ * @dev_id: pointer to the device structure
+ * @regs: the register values
+ *
+ * @return :
+ * irqreturn_t
+ */
+irqreturn_t heci_isr_interrupt(int irq, void *dev_id)
+{
+ int err;
+ struct iamt_heci_device *device = (struct iamt_heci_device *) dev_id;
+ device->host_hw_state = read_heci_register(device, H_CSR);
+
+ if ((device->host_hw_state & H_IS) != H_IS)
+ return IRQ_NONE;
+
+ /* disable interrupts */
+ device->host_hw_state &= ~H_IE;
+ /* acknowledge interrupt and stop interupts */
+ write_heci_register(device, H_CSR, device->host_hw_state);
+ /**
+ * Our device interrupted, schedule work the heci_bh_handler
+ * to handle the interrupt processing. This needs to be a
+ * workqueue item since the handler can sleep.
+ */
+ PREPARE_WORK(&device->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler.\n");
+ err = schedule_work(&device->work);
+ if (!err) {
+ printk(KERN_ERR "%s: schedule the heci_bh_handler"
+ " failed error=%x\n", THIS_MODULE->name, err);
+ }
+ return IRQ_HANDLED;
+}
+
+/**
+ * _heci_cmpl: process completed operation.
+ *
+ * @priv_cb_pos: callback block.
+ * @file_ext: file extension.
+ */
+static void _heci_cmpl(struct heci_file_private *file_ext,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (priv_cb_pos->major_file_operations == HECI_WRITE) {
+ heci_free_cb_private(priv_cb_pos);
+ priv_cb_pos = NULL;
+ DBG("completing write call back.\n");
+ file_ext->writing_state = HECI_WRITE_COMPLETE;
+ if ((&file_ext->tx_wait) &&
+ waitqueue_active(&file_ext->tx_wait))
+ wake_up_interruptible(&file_ext->tx_wait);
+
+ } else if (priv_cb_pos->major_file_operations == HECI_READ
+ && HECI_READING == file_ext->reading_state) {
+ DBG("completing read call back information= %lu\n",
+ priv_cb_pos->information);
+ file_ext->reading_state = HECI_READ_COMPLETE;
+ if ((&file_ext->rx_wait) &&
+ waitqueue_active(&file_ext->rx_wait))
+ wake_up_interruptible(&file_ext->rx_wait);
+
+ }
+}
+
+/**
+ * _heci_cmpl_iamthif: process completed iamthif operation.
+ *
+ * @dev: device object.
+ * @priv_cb_pos: callback block.
+ */
+static void _heci_cmpl_iamthif(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb_pos)
+{
+ if (dev->iamthif_canceled != 1) {
+ dev->iamthif_state = HECI_IAMTHIF_READ_COMPLETE;
+ dev->iamthif_stall_timer = 0;
+ memcpy(priv_cb_pos->response_buffer.data,
+ dev->iamthif_msg_buf,
+ dev->iamthif_msg_buf_index);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->pthi_read_complete_list.heci_cb.cb_list);
+ DBG("pthi read completed.\n");
+ } else {
+ run_next_iamthif_cmd(dev);
+ }
+ if (&dev->iamthif_file_ext.wait) {
+ DBG("completing pthi call back.\n");
+ wake_up_interruptible(&dev->iamthif_file_ext.wait);
+ }
+}
+/**
+ * heci_bh_handler - function called after ISR to handle the interrupt
+ * processing.
+ * @data: pointer to the device structure
+ *
+ * NOTE: This function is called by schedule work
+ */
+static void heci_bh_handler(struct work_struct *work)
+{
+ struct iamt_heci_device *dev =
+ container_of(work, struct iamt_heci_device, work);
+ struct io_heci_list complete_list;
+ __s32 slots;
+ int rets;
+ struct heci_cb_private *cb_pos = NULL, *cb_next = NULL;
+ struct heci_file_private *file_ext = NULL;
+ int bus_message_received = 0;
+ struct task_struct *tsk;
+
+ DBG("function called after ISR to handle the interrupt processing.\n");
+ /* initialize our complete list */
+ spin_lock_bh(&dev->device_lock);
+ heci_initialize_list(&complete_list, dev);
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
+
+ /* check if ME wants a reset */
+ if (((dev->me_hw_state & ME_RDY_HRA) == 0)
+ && (dev->heci_state != HECI_RESETING)
+ && (dev->heci_state != HECI_INITIALIZING)) {
+ DBG("FW not ready.\n");
+ heci_reset(dev, 1);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+
+ /* check if we need to start the dev */
+ if ((dev->host_hw_state & H_RDY) == 0) {
+ if ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA) {
+ DBG("we need to start the dev.\n");
+ dev->host_hw_state |= (H_IE | H_IG | H_RDY);
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ if (dev->heci_state == HECI_INITIALIZING) {
+ dev->recvd_msg = 1;
+ spin_unlock_bh(&dev->device_lock);
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ return;
+
+ } else {
+ spin_unlock_bh(&dev->device_lock);
+ tsk = kthread_run(heci_task_initialize_clients,
+ dev, "heci_reinit");
+ if (IS_ERR(tsk)) {
+ int rc = PTR_ERR(tsk);
+ printk(KERN_WARNING "heci: Unable to"
+ "start the heci thread: %d\n", rc);
+ }
+ return;
+ }
+ } else {
+ DBG("enable interrupt FW not ready.\n");
+ dev->host_hw_state |= (H_IE);
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ }
+ /* check slots avalable for reading */
+ slots = count_full_read_slots(dev);
+ DBG("slots =%08x extra_write_index =%08x.\n",
+ slots, dev->extra_write_index);
+ while ((slots > 0) && (!dev->extra_write_index)) {
+ DBG("slots =%08x extra_write_index =%08x.\n", slots,
+ dev->extra_write_index);
+ DBG("call heci_bh_read_handler.\n");
+ rets = heci_bh_read_handler(&complete_list, dev, &slots);
+ if (rets != 0)
+ goto end;
+ }
+ rets = heci_bh_write_handler(&complete_list, dev, &slots);
+end:
+ DBG("end of bottom half function.\n");
+ dev->host_hw_state = read_heci_register(dev, H_CSR);
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+
+ if ((dev->host_hw_state & H_IS) == H_IS) {
+ PREPARE_WORK(&dev->work, heci_bh_handler);
+ DBG("schedule work the heci_bh_handler.\n");
+ rets = schedule_work(&dev->work);
+ if (!rets) {
+ printk(KERN_ERR "%s: schedule the heci_bh_handler"
+ " failed error=%x\n", THIS_MODULE->name, rets);
+ }
+ } else {
+ dev->host_hw_state |= H_IE;
+ }
+
+ write_heci_register(dev, H_CSR, dev->host_hw_state);
+
+
+ if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) {
+ DBG("received waiting bus message\n");
+ bus_message_received = 1;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ if (bus_message_received) {
+ DBG("wake up dev->wait_recvd_msg\n");
+ wake_up_interruptible(&dev->wait_recvd_msg);
+ bus_message_received = 0;
+ }
+ if ((complete_list.status != 0)
+ || list_empty(&complete_list.heci_cb.cb_list))
+ return;
+
+
+ list_for_each_entry_safe(cb_pos, cb_next,
+ &complete_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)cb_pos->file_private;
+ list_del(&cb_pos->cb_list);
+ if ((file_ext) && (file_ext != &dev->iamthif_file_ext)) {
+ DBG("completing call back.\n");
+ _heci_cmpl(file_ext, cb_pos);
+ cb_pos = NULL;
+ } else if (file_ext == &dev->iamthif_file_ext) {
+ _heci_cmpl_iamthif(dev, cb_pos);
+ }
+ }
+}
+
+
+/**
+ * heci_bh_read_handler - bottom half read routine after ISR to
+ * handle the read processing.
+ *
+ *
+ * @complete_list - An instance of our list structure
+ * @dev - Device object for our driver
+ * @slots - slots to read.
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+static int heci_bh_read_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+ struct heci_msg_hdr *heci_hdr;
+ int ret = 0;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (!dev->rd_msg_hdr) {
+ dev->rd_msg_hdr = read_heci_register(dev, ME_CB_RW);
+ DBG("slots=%08x.\n", *slots);
+ (*slots)--;
+ DBG("slots=%08x.\n", *slots);
+ }
+ heci_hdr = (struct heci_msg_hdr *) &dev->rd_msg_hdr;
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+
+ if ((heci_hdr->reserved) || !(dev->rd_msg_hdr)) {
+ DBG("corrupted message header.\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+
+ if (heci_hdr->host_addr || heci_hdr->me_addr) {
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe read host"
+ " client = %d, ME client = %d\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ if ((file_pos->host_client_id == heci_hdr->host_addr)
+ && (file_pos->me_client_id == heci_hdr->me_addr))
+ break;
+ }
+
+ if (&file_pos->link == &dev->file_list) {
+ DBG("corrupted message header\n");
+ ret = -ECORRUPTED_MESSAGE_HEADER;
+ goto end;
+ }
+ }
+ if (((*slots) * sizeof(__u32)) < heci_hdr->length) {
+ DBG("we can't read the message slots=%08x.\n", *slots);
+ /* we can't read the message */
+ ret = -ERANGE;
+ goto end;
+ }
+
+ /* decide where to read the message too */
+ if (!heci_hdr->host_addr) {
+ DBG("call heci_bh_read_bus_message.\n");
+ heci_bh_read_bus_message(dev, heci_hdr);
+ DBG("end heci_bh_read_bus_message.\n");
+ } else if (heci_hdr->host_addr == dev->iamthif_file_ext.host_client_id
+ && HECI_FILE_CONNECTED == dev->iamthif_file_ext.state
+ && dev->iamthif_state == HECI_IAMTHIF_READING) {
+ DBG("call heci_bh_read_iamthif_message.\n");
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ ret = heci_bh_read_pthi_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ } else {
+ DBG("call heci_bh_read_client_message.\n");
+ ret = heci_bh_read_client_message(cmpl_list, dev, heci_hdr);
+ if (ret != 0)
+ goto end;
+
+ }
+
+ /* reset the number of slots and header */
+ *slots = count_full_read_slots(dev);
+ dev->rd_msg_hdr = 0;
+
+ if (*slots == -ESLOTS_OVERFLOW) {
+ /* overflow - reset */
+ DBG("reseting due to slots overflow.\n");
+ /* set the event since message has been read */
+ ret = -ERANGE;
+ goto end;
+ }
+end:
+ return ret;
+}
+
+
+/**
+ * heci_bh_read_bus_message - bottom half read routine after ISR to
+ * handle the read bus message cmd processing.
+ *
+ * @complete_list - An instance of our list structure
+ * @dev - Device object for our driver
+ * @buffer - message buffer will be filled
+ * @heci_hdr - header of bus message
+ */
+static void heci_bh_read_bus_message(struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_bus_message *heci_msg;
+ struct hbm_host_version_response *version_res;
+ struct hbm_client_connect_response *connect_res;
+ struct hbm_client_connect_response *disconnect_res;
+ struct hbm_flow_control *flow_control;
+ struct hbm_props_response *props_res;
+ struct hbm_host_enum_response *enum_res;
+ struct hbm_client_disconnect_request *disconnect_req;
+ struct hbm_host_stop_request *h_stop_req;
+ int i;
+ unsigned char *buffer;
+
+ buffer = NULL;
+ /* read the message to our buffer */
+ buffer = (unsigned char *) dev->rd_msg_buf;
+ BUG_ON(heci_hdr->length >= sizeof(dev->rd_msg_buf));
+ heci_read_slots(dev, buffer, heci_hdr->length);
+ heci_msg = (struct heci_bus_message *) buffer;
+
+ switch (*(__u8 *) heci_msg) {
+ case HOST_START_RES_CMD:
+ version_res = (struct hbm_host_version_response *) heci_msg;
+ if (version_res->host_version_supported) {
+ dev->version.major_version = HBM_MAJOR_VERSION;
+ dev->version.minor_version = HBM_MINOR_VERSION;
+ } else {
+ dev->version = version_res->me_max_version;
+ }
+ dev->recvd_msg = 1;
+ DBG("host start response message received.\n");
+ break;
+
+ case CLIENT_CONNECT_RES_CMD:
+ connect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_connect_response(dev, connect_res);
+ DBG("client connect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case CLIENT_DISCONNECT_RES_CMD:
+ disconnect_res =
+ (struct hbm_client_connect_response *) heci_msg;
+ heci_client_disconnect_response(dev, disconnect_res);
+ DBG("client disconnect response message received.\n");
+ wake_up(&dev->wait_recvd_msg);
+ break;
+
+ case FLOW_CONTROL_CMD:
+ flow_control = (struct hbm_flow_control *) heci_msg;
+ heci_client_flow_control_response(dev, flow_control);
+ DBG("client flow control response message received.\n");
+ break;
+ case HOST_CLIENT_PROPERTEIS_RES_CMD:
+ props_res = (struct hbm_props_response *) heci_msg;
+ if (props_res->status != 0) {
+ BUG_ON(1);
+ break;
+ }
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ props_res->address) {
+ dev->me_clients[i].props =
+ props_res->client_properties;
+ break;
+ }
+
+ }
+ dev->recvd_msg = 1;
+ break;
+ case HOST_ENUM_RES_CMD:
+ enum_res = (struct hbm_host_enum_response *) heci_msg;
+ memcpy(dev->heci_me_clients, enum_res->valid_addresses, 32);
+ dev->recvd_msg = 1;
+ break;
+ case HOST_STOP_RES_CMD:
+ dev->heci_state = HECI_DISABLED;
+ DBG("reseting because of FW stop response.\n");
+ heci_reset(dev, 1);
+ break;
+ case CLIENT_DISCONNECT_REQ_CMD:
+ /* search for client */
+ disconnect_req =
+ (struct hbm_client_disconnect_request *) heci_msg;
+ heci_client_disconnect_request(dev, disconnect_req);
+ break;
+ case ME_STOP_REQ_CMD:
+ /* prepare stop request */
+ heci_hdr = (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length = sizeof(struct hbm_host_stop_request);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ h_stop_req =
+ (struct hbm_host_stop_request *) &dev->ext_msg_buf[1];
+ memset(h_stop_req, 0, sizeof(struct hbm_host_stop_request));
+ h_stop_req->cmd.cmd = HOST_STOP_REQ_CMD;
+ h_stop_req->reason = DRIVER_STOP_REQUEST;
+ h_stop_req->reserved[0] = 0;
+ h_stop_req->reserved[1] = 0;
+ dev->extra_write_index = 2;
+ break;
+
+ default:
+ BUG_ON(1);
+ break;
+
+ }
+}
+
+/**
+ * heci_bh_read_pthi_message - bottom half read routine after ISR to
+ * handle the read pthi message data processing.
+ *
+ * @complete_list - An instance of our list structure
+ * @dev - Device object for our driver
+ * @buffer - message buffer will be filled
+ * @heci_hdr - header of pthi message
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+static int heci_bh_read_pthi_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext = NULL;
+ struct heci_cb_private *priv_cb = NULL;
+ int rets = 0;
+ unsigned char *buffer = NULL;
+
+ BUG_ON(heci_hdr->me_addr != dev->iamthif_file_ext.me_client_id);
+ BUG_ON(dev->iamthif_state != HECI_IAMTHIF_READING);
+
+ buffer = (unsigned char *) (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index);
+ BUG_ON(sizeof(dev->iamthif_msg_buf) <
+ (dev->iamthif_msg_buf_index + heci_hdr->length));
+
+ heci_read_slots(dev, buffer, heci_hdr->length);
+
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+
+ if (heci_hdr->msg_complete) {
+ DBG("pthi_message_buffer_index=%d\n", heci_hdr->length);
+ DBG("completed pthi read.\n ");
+ if (!dev->iamthif_current_cb)
+ return -ENODEV;
+ priv_cb = dev->iamthif_current_cb;
+ dev->iamthif_current_cb = NULL;
+ file_ext = (struct heci_file_private *)priv_cb->file_private;
+ if (!file_ext)
+ return -ENODEV;
+ dev->iamthif_stall_timer = 0;
+ priv_cb->information = dev->iamthif_msg_buf_index;
+ priv_cb->read_time = get_seconds();
+ if (dev->iamthif_ioctl && file_ext == &dev->iamthif_file_ext) {
+ /* found the iamthif cb */
+ DBG("complete the pthi read cb.\n ");
+ if (&dev->iamthif_file_ext) {
+ DBG("add the pthi read cb to complete.\n ");
+ list_add_tail(&priv_cb->cb_list,
+ &complete_list->heci_cb.cb_list);
+ }
+ }
+ }
+ return rets;
+}
+
+static int _heci_bh_state_ok(struct heci_file_private *file_ext,
+ struct heci_msg_hdr *heci_hdr)
+{
+ return ((file_ext->host_client_id == heci_hdr->host_addr)
+ && (file_ext->me_client_id == heci_hdr->me_addr)
+ && (file_ext->state == HECI_FILE_CONNECTED)
+ && (HECI_READ_COMPLETE != file_ext->reading_state));
+}
+
+/**
+ * heci_bh_read_client_message - bottom half read routine after ISR to
+ * handle the read heci client message data processing.
+ *
+ * @complete_list - An instance of our list structure
+ * @dev - Device object for our driver
+ * @buffer - message buffer will be filled
+ * @heci_hdr - header of heci client message
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+static int heci_bh_read_client_message(struct io_heci_list *complete_list,
+ struct iamt_heci_device *dev,
+ struct heci_msg_hdr *heci_hdr)
+{
+ struct heci_file_private *file_ext = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ unsigned char *buffer = NULL;
+
+ DBG("start client msg\n");
+ if (!((dev->read_list.status == 0) &&
+ !list_empty(&dev->read_list.heci_cb.cb_list)))
+ goto quit;
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->read_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (_heci_bh_state_ok(file_ext, heci_hdr)) {
+ spin_lock(&file_ext->read_io_lock);
+ file_ext->reading_state = HECI_READING;
+ buffer = (unsigned char *)
+ (priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information);
+ BUG_ON(priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information);
+
+ if (priv_cb_pos->response_buffer.size <
+ heci_hdr->length +
+ priv_cb_pos->information) {
+ DBG("message overflow.\n");
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ return -ENOMEM;
+ }
+ if (buffer) {
+ heci_read_slots(dev, buffer,
+ heci_hdr->length);
+ }
+ priv_cb_pos->information += heci_hdr->length;
+ if (heci_hdr->msg_complete) {
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ spin_unlock(&file_ext->read_io_lock);
+ DBG("completed read host client = %d,"
+ "ME client = %d, "
+ "data length = %lu\n",
+ file_ext->host_client_id,
+ file_ext->me_client_id,
+ priv_cb_pos->information);
+
+ *(priv_cb_pos->response_buffer.data +
+ priv_cb_pos->information) = '\0';
+ DBG("priv_cb_pos->res_buffer - %s\n",
+ priv_cb_pos->response_buffer.data);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &complete_list->heci_cb.cb_list);
+ } else {
+ spin_unlock(&file_ext->read_io_lock);
+ }
+
+ break;
+ }
+
+ }
+
+quit:
+ DBG("message read\n");
+ if (!buffer) {
+ heci_read_slots(dev, (unsigned char *) dev->rd_msg_buf,
+ heci_hdr->length);
+ DBG("discarding message, header=%08x.\n",
+ *(__u32 *) dev->rd_msg_buf);
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_iamthif_read: prepare to read iamthif data.
+ * @dev: device object.
+ * @slots: free slotsl.
+ * @return :
+ * 0, OK; otherwise, error.
+ */
+static int _heci_bh_iamthif_read(struct iamt_heci_device *dev, __s32 *slots)
+{
+
+ if (((*slots) * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr)
+ + sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, &dev->iamthif_file_ext)) {
+ DBG("iamthif flow control failed\n");
+ } else {
+ DBG("iamthif flow control success\n");
+ dev->iamthif_state = HECI_IAMTHIF_READING;
+ dev->iamthif_flow_control_pending = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_stall_timer = IAMTHIF_STALL_TIMER;
+ dev->host_buffer_is_empty = host_buffer_is_empty(dev);
+ }
+ return 0;
+ } else {
+ return -ECOMPLETE_MESSAGE;
+ }
+}
+
+/**
+ * _heci_bh_close: process close related operation.
+ * @dev: device object.
+ * @slots: free slotsl.
+ * @priv_cb_pos: callback block.
+ * @file_ext: file extension.
+ * @cmpl_list: complete list.
+ *
+ * @return :
+ * 0, OK; otherwise, error.
+ */
+static int _heci_bh_close(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_disconnect_request) + 3) / 4;
+
+ if (!heci_disconnect(dev, file_ext)) {
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_del(&priv_cb_pos->cb_list);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ file_ext->state = HECI_FILE_DISCONNECTING;
+ file_ext->status = 0;
+ priv_cb_pos->information = 0;
+ list_del(&priv_cb_pos->cb_list);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_hb_close: process read related operation.
+ * @dev: device object.
+ * @slots: free slotsl.
+ * @priv_cb_pos: callback block.
+ * @file_ext: file extension.
+ * @cmpl_list: complete list.
+ *
+ * @return :
+ * 0, OK; otherwise, error.
+ */
+static int _heci_bh_read(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control))) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_flow_control) + 3) / 4;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_del(&priv_cb_pos->cb_list);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ list_del(&priv_cb_pos->cb_list);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+
+/**
+ * _heci_bh_ioctl: process ioctl related operation.
+ * @dev: device object.
+ * @slots: free slotsl.
+ * @priv_cb_pos: callback block.
+ * @file_ext: file extension.
+ * @cmpl_list: complete list.
+ *
+ * @return :
+ * 0, OK; otherwise, error.
+ */
+static int _heci_bh_ioctl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request))) {
+ file_ext->state = HECI_FILE_CONNECTING;
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ sizeof(struct hbm_client_connect_request) + 3) / 4;
+ if (!heci_connect(dev, file_ext)) {
+ file_ext->status = -ENODEV;
+ priv_cb_pos->information = 0;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ list_del(&priv_cb_pos->cb_list);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->ctrl_rd_list.heci_cb.cb_list);
+ file_ext->timer_count = CONNECT_TIMEOUT;
+ }
+ } else {
+ /* return the cancel routine */
+ list_del(&priv_cb_pos->cb_list);
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl: process completed and no-iamthif operation.
+ * @dev: device object.
+ * @slots: free slotsl.
+ * @priv_cb_pos: callback block.
+ * @file_ext: file extension.
+ * @cmpl_list: complete list.
+ *
+ * @return :
+ * 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr = NULL;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ (priv_cb_pos->request_buffer.size -
+ priv_cb_pos->information))) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = ((priv_cb_pos->request_buffer.size) -
+ (priv_cb_pos->information));
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ "heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n",
+ heci_hdr->length);
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ file_ext->status = 0;
+ priv_cb_pos->information += heci_hdr->length;
+ list_del(&priv_cb_pos->cb_list);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ (*slots) -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+ if (!heci_write_message(dev, heci_hdr,
+ (unsigned char *)
+ (priv_cb_pos->request_buffer.data +
+ priv_cb_pos->information),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ list_add_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ return -ENODEV;
+ } else {
+ priv_cb_pos->information += heci_hdr->length;
+ DBG("priv_cb_pos->request_buffer.size =%d"
+ " heci_hdr->msg_complete= %d\n",
+ priv_cb_pos->request_buffer.size,
+ heci_hdr->msg_complete);
+ DBG("priv_cb_pos->information =%lu\n",
+ priv_cb_pos->information);
+ DBG("heci_hdr->length =%d\n", heci_hdr->length);
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * _heci_bh_cmpl_iamthif: process completed iamthif operation.
+ * @dev: device object.
+ * @slots: free slotsl.
+ * @priv_cb_pos: callback block.
+ * @file_ext: file extension.
+ * @cmpl_list: complete list.
+ *
+ * @return :
+ * 0, OK; otherwise, error.
+ */
+static int _heci_bh_cmpl_iamthif(struct iamt_heci_device *dev, __s32 *slots,
+ struct heci_cb_private *priv_cb_pos,
+ struct heci_file_private *file_ext,
+ struct io_heci_list *cmpl_list)
+{
+ struct heci_msg_hdr *heci_hdr = NULL;
+
+ if ((*slots * sizeof(__u32)) >= (sizeof(struct heci_msg_hdr) +
+ dev->iamthif_msg_buf_size -
+ dev->iamthif_msg_buf_index)) {
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length = dev->iamthif_msg_buf_size -
+ dev->iamthif_msg_buf_index;
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index),
+ heci_hdr->length)) {
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ } else {
+ flow_ctrl_reduce(dev, file_ext);
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+ list_del(&priv_cb_pos->cb_list);
+ priv_cb_pos->information = dev->iamthif_msg_buf_index;
+ file_ext->status = 0;
+ dev->iamthif_state = HECI_IAMTHIF_FLOW_CONTROL;
+ dev->iamthif_flow_control_pending = 1;
+ /* save iamthif cb sent to pthi client */
+ dev->iamthif_current_cb = priv_cb_pos;
+ list_add_tail(&priv_cb_pos->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+
+ }
+ } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) {
+ /* buffer is still empty */
+ heci_hdr = (struct heci_msg_hdr *) &dev->wr_msg_buf[0];
+ heci_hdr->host_addr = file_ext->host_client_id;
+ heci_hdr->me_addr = file_ext->me_client_id;
+ heci_hdr->length =
+ (*slots * sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr->msg_complete = 0;
+ heci_hdr->reserved = 0;
+
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ heci_hdr->length + 3) / 4;
+
+ if (!heci_write_message(dev, heci_hdr,
+ (dev->iamthif_msg_buf +
+ dev->iamthif_msg_buf_index),
+ heci_hdr->length)) {
+ file_ext->status = -ENODEV;
+ list_del(&priv_cb_pos->cb_list);
+ } else {
+ dev->iamthif_msg_buf_index += heci_hdr->length;
+ }
+ return -ECOMPLETE_MESSAGE;
+ } else {
+ return -ECORRUPTED_MESSAGE_HEADER;
+ }
+
+ return 0;
+}
+
+/**
+ * heci_bh_write_handler - bottom half write routine after
+ * ISR to handle the write processing.
+ *
+ * @complete_list - An instance of our list structure
+ * @dev - Device object for our driver
+ * @slots - slots to write.
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+static int heci_bh_write_handler(struct io_heci_list *cmpl_list,
+ struct iamt_heci_device *dev,
+ __s32 *slots)
+{
+
+ struct heci_file_private *file_ext = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+ struct io_heci_list *list;
+ int ret;
+
+ if (!host_buffer_is_empty(dev)) {
+ DBG("host buffer is not empty.\n");
+ return 0;
+ }
+ dev->write_hang = -1;
+ *slots = count_empty_write_slots(dev);
+ /* complete all waiting for write CB */
+ DBG("complete all waiting for write cb.\n");
+
+ list = &dev->write_waiting_list;
+ if (list->status == 0
+ && !list_empty(&list->heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &list->heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ file_ext->status = 0;
+ list_del(&priv_cb_pos->cb_list);
+ if (HECI_WRITING == file_ext->writing_state &&
+ (priv_cb_pos->major_file_operations ==
+ HECI_WRITING) &&
+ file_ext != &dev->iamthif_file_ext) {
+ DBG("HECI WRITE COMPLETE\n");
+ file_ext->writing_state = HECI_WRITE_COMPLETE;
+ list_add_tail(&priv_cb_pos->cb_list,
+ &cmpl_list->heci_cb.cb_list);
+ }
+ if (file_ext == &dev->iamthif_file_ext) {
+ DBG("check iamthif flow control.\n");
+ if (dev->iamthif_flow_control_pending) {
+ ret = _heci_bh_iamthif_read(dev, slots);
+ if (ret != 0)
+ return ret;
+ }
+ }
+
+ }
+ }
+
+ if (dev->stop && !dev->wd_pending) {
+ dev->wd_stoped = 1;
+ wake_up_interruptible(&dev->wait_stop_wd);
+ return 0;
+ }
+
+ if (dev->extra_write_index != 0) {
+ DBG("extra_write_index =%d.\n", dev->extra_write_index);
+ heci_write_message(dev,
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0],
+ (unsigned char *) &dev->ext_msg_buf[1],
+ (dev->extra_write_index - 1) * sizeof(__u32));
+ *slots -= dev->extra_write_index;
+ dev->extra_write_index = 0;
+ }
+ if (dev->heci_state == HECI_ENABLED) {
+ if (dev->wd_pending
+ && flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ if (!heci_send_wd(dev))
+ DBG("wd send failed.\n");
+ else
+ flow_ctrl_reduce(dev, &dev->wd_file_ext);
+
+ dev->wd_pending = 0;
+
+ if (dev->wd_timeout != 0) {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_START_WD_DATA_SIZE + 3) / 4;
+ dev->wd_due_counter = 2;
+ } else {
+ *slots -= (sizeof(struct heci_msg_hdr) +
+ HECI_WD_PARAMS_SIZE + 3) / 4;
+ dev->wd_due_counter = 0;
+ }
+
+ }
+ }
+ if (dev->stop)
+ return ~ENODEV;
+
+ /* complete control write list CB */
+ if (dev->ctrl_wr_list.status == 0) {
+ /* complete control write list CB */
+ DBG("complete control write list cb.\n");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_wr_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (!file_ext) {
+ list_del(&priv_cb_pos->cb_list);
+ return -ENODEV;
+ }
+ switch (priv_cb_pos->major_file_operations) {
+ case HECI_CLOSE:
+ /* send disconnect message */
+ ret = _heci_bh_close(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_READ:
+ /* send flow control message */
+ ret = _heci_bh_read(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+ case HECI_IOCTL:
+ /* connect message */
+ if (!other_client_is_connecting(dev, file_ext))
+ continue;
+ ret = _heci_bh_ioctl(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ break;
+
+ default:
+ BUG_ON(1);
+ }
+
+ }
+ }
+ /* complete write list CB */
+ if (dev->write_list.status == 0
+ && !list_empty(&dev->write_list.heci_cb.cb_list)) {
+ DBG("complete write list cb.\n");
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->write_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext != NULL) &&
+ (file_ext != &dev->iamthif_file_ext)) {
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control credentials"
+ "for client %d, not sending.\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl(dev, slots,
+ priv_cb_pos,
+ file_ext, cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ } else if (file_ext == &dev->iamthif_file_ext) {
+ /* IAMTHIF IOCTL */
+ DBG("complete pthi write cb.\n");
+ if (!flow_ctrl_creds(dev, file_ext)) {
+ DBG("No flow control credentials"
+ "for pthi client %d.\n",
+ file_ext->host_client_id);
+ continue;
+ }
+ ret = _heci_bh_cmpl_iamthif(dev, slots,
+ priv_cb_pos,
+ file_ext,
+ cmpl_list);
+ if (ret != 0)
+ return ret;
+
+ }
+
+ }
+ }
+ return 0;
+}
+
+
+/**
+ * is_treat_specially_client - check if the message belong
+ * to the file extension .
+ * @file_ext -extension of the file object
+ * @connect_res -connect response bus message
+ * @dev -Device object for our driver
+ *
+ * @return :
+ * 1 if empty
+ * 0 - otherwise.
+ */
+static int is_treat_specially_client(struct heci_file_private *file_ext,
+ struct hbm_client_connect_response *rs)
+{
+ int ret = 0;
+
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+ if (rs->status == 0) {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_CONNECTED;
+ file_ext->status = 0;
+ } else {
+ DBG("client connect status = 0x%08x.\n", rs->status);
+ file_ext->state = HECI_FILE_DISCONNECTED;
+ file_ext->status = -ENODEV;
+ }
+ ret = 1;
+ }
+ DBG("client state = %d.\n", file_ext->state);
+ return ret;
+}
+
+/**
+ * heci_client_connect_response - connect response bh routine
+ *
+ * @dev -Device object for our driver
+ * @connect_res -connect response bus message
+ * @complete_list - An instance of our list structure
+ */
+static void heci_client_connect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+
+ struct heci_file_private *file_ext = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ /* if WD or iamthif client treat specially */
+
+ if ((is_treat_specially_client(&(dev->wd_file_ext), rs)) ||
+ (is_treat_specially_client(&(dev->iamthif_file_ext), rs)))
+ return;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (!file_ext) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+ if (HECI_IOCTL == priv_cb_pos->major_file_operations) {
+ if (is_treat_specially_client(file_ext, rs)) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+ }
+}
+
+/**
+ * heci_client_disconnect_response - disconnect response bh routine
+ *
+ * @dev -Device object for our driver
+ * @disconnect_res -disconnect response bus message
+ * @complete_list - An instance of our list structure
+ */
+static void heci_client_disconnect_response(struct iamt_heci_device *dev,
+ struct hbm_client_connect_response *rs)
+{
+ struct heci_file_private *file_ext = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL, *priv_cb_next = NULL;
+
+ if (dev->ctrl_rd_list.status == 0
+ && !list_empty(&dev->ctrl_rd_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->ctrl_rd_list.heci_cb.cb_list, cb_list) {
+ file_ext = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if (!file_ext) {
+ list_del(&priv_cb_pos->cb_list);
+ return;
+ }
+
+ DBG("list_for_each_entry_safe in ctrl_rd_list.\n");
+ if ((file_ext->host_client_id == rs->host_addr) &&
+ (file_ext->me_client_id == rs->me_addr)) {
+
+ list_del(&priv_cb_pos->cb_list);
+ if (rs->status == 0) {
+ file_ext->state =
+ HECI_FILE_DISCONNECTED;
+ }
+
+ file_ext->status = 0;
+ file_ext->timer_count = 0;
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_flow_addr: tell they have same address.
+ * @file: file extension.
+ * @flow: flow control.
+ * @return :
+ * 1, same; 0,not.
+ */
+static int same_flow_addr(struct heci_file_private *file,
+ struct hbm_flow_control *flow)
+{
+ if ((file->host_client_id == flow->host_addr)
+ && (file->me_client_id == flow->me_addr))
+ return 1;
+
+ return 0;
+}
+
+/**
+ * add_single_flow_creds: add single buffer credentials.
+ * @file: file extension.
+ * @flow: flow control.
+ */
+static void add_single_flow_creds(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow)
+{
+ struct heci_me_client *client = NULL;
+ int i;
+
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ client = &dev->me_clients[i];
+ if (flow->me_addr == client->client_id) {
+ if (client->props.single_recv_buf != 0) {
+ client->flow_ctrl_creds++;
+ DBG("recv flow ctrl msg ME %d (single).\n",
+ flow->me_addr);
+ DBG("flow control credentials=%d.\n",
+ client->flow_ctrl_creds);
+ } else {
+ BUG_ON(1); /* error in flow control */
+ }
+ }
+ }
+}
+/**
+ * heci_client_flow_control_response - flow control response bh routine
+ *
+ * @dev -Device object for our driver
+ * @flow_control -flow control response bus message
+ */
+static void heci_client_flow_control_response(struct iamt_heci_device *dev,
+ struct hbm_flow_control *flow_control)
+{
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ if (flow_control->host_addr == 0) {
+ /* single receive buffer */
+ add_single_flow_creds(dev, flow_control);
+ } else {
+ /* normal connection */
+ list_for_each_entry_safe(file_pos, file_next,
+ &dev->file_list, link) {
+ DBG("list_for_each_entry_safe in file_list\n");
+
+ DBG("file_ext of host client %d ME client %d.\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ DBG("flow ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ if (same_flow_addr(file_pos, flow_control)) {
+ DBG("recv ctrl msg for host %d ME %d.\n",
+ flow_control->host_addr,
+ flow_control->me_addr);
+ file_pos->flow_ctrl_creds++;
+ DBG("flow control credentials=%d.\n",
+ file_pos->flow_ctrl_creds);
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * same_disconn_addr: tell they have same address
+ * @file: file extension
+ * @disconn: disconnection request.
+ * @return :
+ * 1, same; 0,not.
+ */
+static int same_disconn_addr(struct heci_file_private *file,
+ struct hbm_client_disconnect_request *disconn)
+{
+ if ((file->host_client_id == disconn->host_addr)
+ && (file->me_client_id == disconn->me_addr))
+ return 1;
+
+ return 0;
+}
+
+/**
+ * heci_client_disconnect_request - disconnect request bh routine
+ *
+ * @dev -Device object for our driver
+ * @disconnect_req -disconnect request bus message
+ */
+static void heci_client_disconnect_request(struct iamt_heci_device *dev,
+ struct hbm_client_disconnect_request *disconnect_req)
+{
+ struct heci_msg_hdr *heci_hdr;
+ struct hbm_client_connect_response *disconnect_res;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+
+ list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link) {
+ if (same_disconn_addr(file_pos, disconnect_req)) {
+ DBG("disconnect request host client %d ME client %d.\n",
+ disconnect_req->host_addr,
+ disconnect_req->me_addr);
+ file_pos->state = HECI_FILE_DISCONNECTED;
+ file_pos->timer_count = 0;
+ if (file_pos == &dev->wd_file_ext) {
+ dev->wd_due_counter = 0;
+ dev->wd_pending = 0;
+ } else if (file_pos == &dev->iamthif_file_ext)
+ dev->iamthif_timer = 0;
+
+ /* prepare disconnect response */
+ heci_hdr =
+ (struct heci_msg_hdr *) &dev->ext_msg_buf[0];
+ heci_hdr->host_addr = 0;
+ heci_hdr->me_addr = 0;
+ heci_hdr->length =
+ sizeof(struct hbm_client_connect_response);
+ heci_hdr->msg_complete = 1;
+ heci_hdr->reserved = 0;
+
+ disconnect_res =
+ (struct hbm_client_connect_response *)
+ &dev->ext_msg_buf[1];
+ disconnect_res->host_addr = file_pos->host_client_id;
+ disconnect_res->me_addr = file_pos->me_client_id;
+ *(__u8 *) (&disconnect_res->cmd) =
+ CLIENT_DISCONNECT_RES_CMD;
+ disconnect_res->status = 0;
+ dev->extra_write_index = 2;
+ break;
+ }
+ }
+}
+
+/**
+ * heci_timer - timer function.
+ * @data: pointer to the device structure
+ *
+ * NOTE: This function is called by timer interrupt work
+ */
+void heci_wd_timer(unsigned long data)
+{
+ struct iamt_heci_device *dev = (struct iamt_heci_device *) data;
+
+ DBG("send watchdog.\n");
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+ return;
+ }
+ /*** Watchdog ***/
+ if ((dev->wd_due_counter != 0) && (dev->wd_bypass == 0)) {
+ if (--dev->wd_due_counter == 0) {
+ if (dev->host_buffer_is_empty &&
+ flow_ctrl_creds(dev, &dev->wd_file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_wd(dev)) {
+ DBG("wd send failed.\n");
+ } else {
+ flow_ctrl_reduce(dev,
+ &dev->wd_file_ext);
+ }
+
+ if (dev->wd_timeout != 0)
+ dev->wd_due_counter = 2;
+ else
+ dev->wd_due_counter = 0;
+
+ } else
+ dev->wd_pending = 1;
+
+ }
+ }
+ if (dev->iamthif_stall_timer != 0) {
+ if (--dev->iamthif_stall_timer == 0) {
+ DBG("reseting because of hang to PTHI.\n");
+ heci_reset(dev, 1);
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+ spin_unlock_bh(&dev->device_lock);
+
+ if (dev->iamthif_current_cb)
+ heci_free_cb_private(dev->iamthif_current_cb);
+
+ spin_lock_bh(&dev->device_lock);
+ dev->iamthif_file_object = NULL;
+ dev->iamthif_current_cb = NULL;
+ run_next_iamthif_cmd(dev);
+ }
+ }
+ mod_timer(&dev->wd_timer, round_jiffies(jiffies + 2 * HZ));
+ spin_unlock_bh(&dev->device_lock);
+}
diff --git a/drivers/char/heci/io_heci.c b/drivers/char/heci/io_heci.c
new file mode 100644
index 0000000..73ab64f
--- /dev/null
+++ b/drivers/char/heci/io_heci.c
@@ -0,0 +1,865 @@
+/*
+ * Part of Intel(R) Manageability Engine Interface Linux driver
+ *
+ * Copyright (c) 2003 - 2008 Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/aio.h>
+#include <linux/pci.h>
+#include <linux/reboot.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/list.h>
+#include <linux/unistd.h>
+#include <linux/delay.h>
+
+#include "heci_data_structures.h"
+#include "heci.h"
+#include "heci_interface.h"
+#include "heci_version.h"
+
+
+/**
+ * heci_ioctl_get_version - the get driver version IOCTL function
+ * @dev -Device object for our driver
+ * @if_num minor number
+ * @*u_msg pointer to user data struct in user space
+ * @k_msg data in kernel on the stack
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+int heci_ioctl_get_version(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+
+ int rets = 0;
+ struct heci_driver_version *version;
+ struct heci_message_data res_msg;
+ res_msg.data = NULL;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev)
+ || (!file_ext))
+ return -ENODEV;
+
+ if (k_msg.size < (sizeof(struct heci_driver_version) - 2)) {
+ DBG("user buffer less than heci_driver_version.\n");
+ return -EMSGSIZE;
+ }
+
+ res_msg.data = kmalloc(sizeof(struct heci_driver_version), GFP_KERNEL);
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_driver_version));
+ return -ENOMEM;
+ }
+
+ version = (struct heci_driver_version *) res_msg.data;
+ version->major = MAJOR_VERSION;
+ version->minor = MINOR_VERSION;
+ version->hotfix = QUICK_FIX_NUMBER;
+ version->build = VER_BUILD;
+ res_msg.size = sizeof(struct heci_driver_version);
+ if (k_msg.size < sizeof(struct heci_driver_version))
+ res_msg.size -= 2;
+
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+end:
+ kfree(res_msg.data);
+ return rets;
+}
+
+/**
+ * heci_ioctl_connect_client - the connect to fw client IOCTL function
+ * @dev -Device object for our driver
+ * @if_num minor number
+ * @*u_msg pointer to user data struct in user space
+ * @k_msg data in kernel on the stack
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data *u_msg,
+ struct heci_message_data k_msg,
+ struct file *file)
+{
+
+ int rets = 0;
+ struct heci_message_data req_msg, res_msg;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_client *client;
+ struct heci_file_private *file_ext = NULL;
+ struct heci_file_private *file_pos = NULL;
+ struct heci_file_private *file_next = NULL;
+ long timeout = 15; /*15 second */
+ __u8 i;
+ int err = 0;
+ res_msg.data = NULL;
+ req_msg.data = NULL;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file))
+ return -ENODEV;
+
+ file_ext = file->private_data;
+ if (!file_ext)
+ return -ENODEV;
+
+ if (k_msg.size != sizeof(struct guid)) {
+ DBG("user buffer size is not equal to size of struct "
+ "guid(16).\n");
+ return -EMSGSIZE;
+ }
+
+ req_msg.data = kmalloc(sizeof(struct guid), GFP_KERNEL);
+ res_msg.data = kmalloc(sizeof(struct heci_client), GFP_KERNEL);
+
+ if (!res_msg.data) {
+ DBG("failed allocation response buffer size = %d.\n",
+ (int) sizeof(struct heci_client));
+ kfree(req_msg.data);
+ req_msg.data = NULL;
+ return -ENOMEM;
+ }
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ (int) sizeof(struct guid));
+ kfree(res_msg.data);
+ res_msg.data = NULL;
+ return -ENOMEM;
+ }
+ req_msg.size = sizeof(struct guid);
+ res_msg.size = sizeof(struct heci_client);
+ if (!k_msg.data) {
+ rets = -EIO;
+ goto end;
+ }
+
+ /* copy the message to kernel space -
+ * use a pointer already copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, k_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ /* buffered ioctl cb */
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb) {
+ rets = -ENOMEM;
+ goto end;
+ }
+ INIT_LIST_HEAD(&priv_cb->cb_list);
+ priv_cb->response_buffer.data = res_msg.data;
+ priv_cb->response_buffer.size = res_msg.size;
+ priv_cb->request_buffer.data = req_msg.data;
+ priv_cb->request_buffer.size = req_msg.size;
+ priv_cb->major_file_operations = HECI_IOCTL;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if ((file_ext->state != HECI_FILE_INITIALIZING) &&
+ (file_ext->state != HECI_FILE_DISCONNECTED)) {
+ rets = -EBUSY;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ /* find ME client we're trying to connect to */
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (memcmp((struct guid *)req_msg.data,
+ &dev->me_clients[i].props.protocol_name,
+ sizeof(struct guid)) == 0) {
+ if (dev->me_clients[i].props.fixed_address == 0) {
+ file_ext->me_client_id =
+ dev->me_clients[i].client_id;
+ file_ext->state = HECI_FILE_CONNECTING;
+ }
+ break;
+ }
+ }
+ /* if we're connecting to PTHI client so we will use the exist
+ * connection
+ */
+ if (memcmp((struct guid *)req_msg.data, &heci_pthi_guid,
+ sizeof(struct guid)) == 0) {
+ if (dev->iamthif_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ dev->heci_host_clients[file_ext->host_client_id / 8] &=
+ ~(1 << (file_ext->host_client_id % 8));
+ list_for_each_entry_safe(file_pos,
+ file_next, &dev->file_list, link) {
+ if (heci_fe_same_id(file_ext, file_pos)) {
+ DBG("remove file extension node host"
+ " client = %d, ME client = %d.\n",
+ file_pos->host_client_id,
+ file_pos->me_client_id);
+ list_del(&file_pos->link);
+ }
+
+ }
+ DBG("free file extension memory.\n");
+ kfree(file_ext);
+ file_ext = NULL;
+ file->private_data = &dev->iamthif_file_ext;
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length =
+ dev->me_clients[i].props.max_msg_length;
+ client->protocol_version =
+ dev->me_clients[i].props.protocol_version;
+ rets = dev->iamthif_file_ext.status;
+ spin_unlock_bh(&dev->device_lock);
+
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ }
+ spin_lock(&file_ext->file_lock);
+ if (file_ext->state != HECI_FILE_CONNECTING) {
+ rets = -ENODEV;
+ spin_unlock(&file_ext->file_lock);
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ spin_unlock(&file_ext->file_lock);
+ /* prepare the output buffer */
+ client = (struct heci_client *) res_msg.data;
+ client->max_msg_length = dev->me_clients[i].props.max_msg_length;
+ client->protocol_version = dev->me_clients[i].props.protocol_version;
+ if (dev->host_buffer_is_empty
+ && !other_client_is_connecting(dev, file_ext)) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_connect(dev, file_ext)) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ } else {
+ file_ext->timer_count = CONNECT_TIMEOUT;
+ priv_cb->file_private = file_ext;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_rd_list.heci_cb.
+ cb_list);
+ }
+
+
+ } else {
+ priv_cb->file_private = file_ext;
+ DBG("add connect cb to control write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ err = wait_event_timeout(dev->wait_recvd_msg,
+ (HECI_FILE_CONNECTED == file_ext->state
+ || HECI_FILE_DISCONNECTED == file_ext->state),
+ timeout * HZ);
+
+ if (HECI_FILE_CONNECTED == file_ext->state) {
+ DBG("successfully connected to FW client.\n");
+ rets = file_ext->status;
+ /* now copy the data to user space */
+ if (copy_to_user(k_msg.data, res_msg.data, res_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ if (put_user(res_msg.size, &u_msg->size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ goto end;
+ } else {
+ DBG("failed to connect to FW client.file_ext->state = %d.\n",
+ file_ext->state);
+ if (!err) {
+ DBG("wait_event_interruptible_timeout failed on client"
+ " connect message fw response message.\n");
+ }
+ rets = -EFAULT;
+ goto remove_list;
+ }
+
+remove_list:
+ if (priv_cb) {
+ spin_lock_bh(&dev->device_lock);
+ heci_flush_list(&dev->ctrl_rd_list, file_ext);
+ heci_flush_list(&dev->ctrl_wr_list, file_ext);
+ spin_unlock_bh(&dev->device_lock);
+ }
+end:
+ DBG("free connect cb memory.");
+ kfree(req_msg.data);
+ req_msg.data = NULL;
+ kfree(res_msg.data);
+ res_msg.data = NULL;
+ kfree(priv_cb);
+ priv_cb = NULL;
+ return rets;
+}
+
+/**
+ * heci_ioctl_wd - the wd IOCTL function
+ * @dev -Device object for our driver
+ * @if_num minor number
+ * @k_msg data in kernel on the stack
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+int heci_ioctl_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ struct heci_message_data req_msg; /*in kernel on the stack */
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size != HECI_WATCHDOG_DATA_SIZE) {
+ DBG("user buffer has invalid size.\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+
+ req_msg.data = kmalloc(HECI_WATCHDOG_DATA_SIZE, GFP_KERNEL);
+ if (!req_msg.data) {
+ DBG("failed allocation request buffer size = %d.\n",
+ HECI_WATCHDOG_DATA_SIZE);
+ return -ENOMEM;
+ }
+ req_msg.size = HECI_WATCHDOG_DATA_SIZE;
+
+ /* copy the message to kernel space - use a pointer already
+ * copied into kernel space
+ */
+ if (copy_from_user(req_msg.data, k_msg.data, req_msg.size)) {
+ rets = -EFAULT;
+ goto end;
+ }
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ if (dev->wd_file_ext.state != HECI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+ if (!dev->asf_mode) {
+ rets = -EIO;
+ spin_unlock_bh(&dev->device_lock);
+ goto end;
+ }
+
+ memcpy(&dev->wd_data[HECI_WD_PARAMS_SIZE], req_msg.data,
+ HECI_WATCHDOG_DATA_SIZE);
+
+ dev->wd_timeout = (req_msg.data[1] << 8) + req_msg.data[0];
+ dev->wd_pending = 0;
+ dev->wd_due_counter = 1; /* next timer */
+ if (dev->wd_timeout == 0) {
+ memcpy(dev->wd_data, &stop_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ } else {
+ memcpy(dev->wd_data, &start_wd_params,
+ HECI_WD_PARAMS_SIZE);
+ mod_timer(&dev->wd_timer, jiffies);
+ }
+ spin_unlock_bh(&dev->device_lock);
+end:
+ kfree(req_msg.data);
+ req_msg.data = NULL;
+ return rets;
+}
+
+
+/**
+ * heci_ioctl_bypass_wd - the bypass_wd IOCTL function
+ * @dev -Device object for our driver
+ * @if_num minor number
+ * @k_msg data in kernel on the stack
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+int heci_ioctl_bypass_wd(struct iamt_heci_device *dev, int if_num,
+ struct heci_message_data k_msg,
+ struct heci_file_private *file_ext)
+{
+ __u8 flag = 0;
+ int rets = 0;
+
+ if (if_num != HECI_MINOR_NUMBER)
+ return -ENODEV;
+
+ spin_lock(&file_ext->file_lock);
+ if (k_msg.size < 1) {
+ DBG("user buffer less than HECI_WATCHDOG_DATA_SIZE.\n");
+ spin_unlock(&file_ext->file_lock);
+ return -EMSGSIZE;
+ }
+ spin_unlock(&file_ext->file_lock);
+ if (copy_from_user(&flag, k_msg.data, 1)) {
+ rets = -EFAULT;
+ goto end;
+ }
+
+ spin_lock_bh(&dev->device_lock);
+ flag = flag ? (1) : (0);
+ dev->wd_bypass = flag;
+ spin_unlock_bh(&dev->device_lock);
+end:
+ return rets;
+}
+
+/**
+ * find_pthi_read_list_entry - finds a PTHIlist entry for current file
+ * @dev -Device object for our driver
+ *
+ * @return :
+ * returned a list entry on success,
+ * NULL on failure.
+ */
+struct heci_cb_private *find_pthi_read_list_entry(
+ struct iamt_heci_device *dev,
+ struct file *file,
+ struct heci_file_private *file_ext)
+{
+ struct heci_file_private *file_ext_temp = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+
+ if (dev->pthi_read_complete_list.status == 0 &&
+ !list_empty(&dev->pthi_read_complete_list.heci_cb.cb_list)) {
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_read_complete_list.heci_cb.cb_list, cb_list) {
+ file_ext_temp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+ if (file_ext_temp) {
+ if ((file_ext == &dev->iamthif_file_ext) &&
+ (priv_cb_pos->file_object == file))
+ return priv_cb_pos;
+
+ }
+ }
+ }
+ return NULL;
+}
+
+/**
+ * pthi_read - read data from pthi client
+ * @dev -Device object for our driver
+ * @if_num minor number
+ * @*u_msg pointer to user data in user space
+ * @length-user data length
+ *
+ * @return :
+ * returned data length on success,
+ * zero if no data to read,
+ * negative on failure.
+ */
+int pthi_read(struct iamt_heci_device *dev, int if_num, struct file *file,
+ char *ubuf, size_t length, loff_t *offset)
+{
+
+ int rets = 0;
+ struct heci_cb_private *priv_cb = NULL;
+ struct heci_file_private *file_ext = file->private_data;
+ __u8 i;
+ unsigned long currtime = get_seconds();
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev))
+ return -ENODEV;
+
+ if (!file_ext)
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id ==
+ dev->iamthif_file_ext.me_client_id)
+ break;
+ }
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients)
+ || (dev->me_clients[i].client_id !=
+ dev->iamthif_file_ext.me_client_id)) {
+ DBG("PTHI client not found.\n");
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ priv_cb = find_pthi_read_list_entry(dev, file, file_ext);
+ if (!priv_cb) {
+ spin_unlock_bh(&dev->device_lock);
+ return 0; /* No more data to read */
+ } else {
+ if (priv_cb &&
+ (currtime - priv_cb->read_time > IAMTHIF_READ_TIMER)) {
+ /* 15 sec for the message has expired */
+ list_del(&priv_cb->cb_list);
+ spin_unlock_bh(&dev->device_lock);
+ rets = -ETIMEDOUT;
+ goto free;
+ }
+ /* if the whole message will fit remove it from the list */
+ if ((priv_cb->information >= *offset) &&
+ (length >= (priv_cb->information - *offset)))
+ list_del(&priv_cb->cb_list);
+ else if ((priv_cb->information > 0) &&
+ (priv_cb->information <= *offset)) {
+ /* end of the message has been reached */
+ list_del(&priv_cb->cb_list);
+ rets = 0;
+ spin_unlock_bh(&dev->device_lock);
+ goto free;
+ }
+ /* else means that not full buffer will be read and do not
+ * remove message from deletion list
+ */
+ }
+ DBG("pthi priv_cb->response_buffer size - %d\n",
+ priv_cb->response_buffer.size);
+ DBG("pthi priv_cb->information - %lu\n",
+ priv_cb->information);
+ spin_unlock_bh(&dev->device_lock);
+
+ /* length is being turncated to PAGE_SIZE, however,
+ * the information may be longer */
+ length = length < (priv_cb->information - *offset) ?
+ length : (priv_cb->information - *offset);
+
+ if (copy_to_user(ubuf,
+ priv_cb->response_buffer.data + *offset,
+ length))
+ rets = -EFAULT;
+ else {
+ rets = length;
+ if ((*offset + length) < priv_cb->information) {
+ *offset += length;
+ goto out;
+ }
+ }
+free:
+ DBG("free pthi cb memory.\n");
+ *offset = 0;
+ heci_free_cb_private(priv_cb);
+out:
+ return rets;
+}
+
+/**
+ * heci_start_read - the start read client message function.
+ * @dev -Device object for our driver
+ * @if_num minor number
+ * @file_ext -extension of the file object
+ *
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+int heci_start_read(struct iamt_heci_device *dev, int if_num,
+ struct heci_file_private *file_ext)
+{
+ int rets = 0;
+ __u8 i;
+ struct heci_cb_private *priv_cb = NULL;
+
+ if ((if_num != HECI_MINOR_NUMBER) || (!dev) || (!file_ext)) {
+ DBG("received wrong function input param.\n");
+ return -ENODEV;
+ }
+ if (file_ext->state != HECI_FILE_CONNECTED)
+ return -ENODEV;
+
+ spin_lock_bh(&dev->device_lock);
+ if (dev->heci_state != HECI_ENABLED) {
+ spin_unlock_bh(&dev->device_lock);
+ return -ENODEV;
+ }
+ spin_unlock_bh(&dev->device_lock);
+ DBG("check if read is pending.\n");
+ if ((file_ext->read_pending) || (file_ext->read_cb != NULL)) {
+ DBG("read is pending.\n");
+ return -EBUSY;
+ }
+ priv_cb = kzalloc(sizeof(struct heci_cb_private), GFP_KERNEL);
+ if (!priv_cb)
+ return -ENOMEM;
+
+ DBG("allocation call back success\n"
+ "host client = %d, ME client = %d\n",
+ file_ext->host_client_id, file_ext->me_client_id);
+ spin_lock_bh(&dev->device_lock);
+ for (i = 0; i < dev->num_heci_me_clients; i++) {
+ if (dev->me_clients[i].client_id == file_ext->me_client_id)
+ break;
+
+ }
+
+ BUG_ON(dev->me_clients[i].client_id != file_ext->me_client_id);
+ if ((i == dev->num_heci_me_clients)) {
+ rets = -ENODEV;
+ goto unlock;
+ }
+
+ priv_cb->response_buffer.size = dev->me_clients[i].props.max_msg_length;
+ spin_unlock_bh(&dev->device_lock);
+ priv_cb->response_buffer.data =
+ kmalloc(priv_cb->response_buffer.size, GFP_KERNEL);
+ if (!priv_cb->response_buffer.data) {
+ rets = -ENOMEM;
+ goto fail;
+ }
+ DBG("allocation call back data success.\n");
+ priv_cb->major_file_operations = HECI_READ;
+ /* make sure information is zero before we start */
+ priv_cb->information = 0;
+ priv_cb->file_private = (void *) file_ext;
+ file_ext->read_cb = priv_cb;
+ spin_lock_bh(&dev->device_lock);
+ if (dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (!heci_send_flow_control(dev, file_ext)) {
+ rets = -ENODEV;
+ goto unlock;
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->read_list.heci_cb.cb_list);
+ }
+ } else {
+ list_add_tail(&priv_cb->cb_list,
+ &dev->ctrl_wr_list.heci_cb.cb_list);
+ }
+ spin_unlock_bh(&dev->device_lock);
+ return rets;
+unlock:
+ spin_unlock_bh(&dev->device_lock);
+fail:
+ heci_free_cb_private(priv_cb);
+ return rets;
+}
+
+/**
+ * pthi_write - write iamthif data to pthi client
+ * @dev -Device object for our driver
+ * @priv_cb - heci call back struct
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+int pthi_write(struct iamt_heci_device *dev,
+ struct heci_cb_private *priv_cb)
+{
+ int rets = 0;
+ struct heci_msg_hdr heci_hdr;
+
+ if ((!dev) || (!priv_cb))
+ return -ENODEV;
+
+ DBG("write data to pthi client.\n");
+
+ dev->iamthif_state = HECI_IAMTHIF_WRITING;
+ dev->iamthif_current_cb = priv_cb;
+ dev->iamthif_file_object = priv_cb->file_object;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_msg_buf_size = priv_cb->request_buffer.size;
+ memcpy(dev->iamthif_msg_buf, priv_cb->request_buffer.data,
+ priv_cb->request_buffer.size);
+
+ if (flow_ctrl_creds(dev, &dev->iamthif_file_ext) &&
+ dev->host_buffer_is_empty) {
+ dev->host_buffer_is_empty = 0;
+ if (priv_cb->request_buffer.size >
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr)) {
+ heci_hdr.length =
+ (((dev->host_hw_state & H_CBD) >> 24) *
+ sizeof(__u32)) - sizeof(struct heci_msg_hdr);
+ heci_hdr.msg_complete = 0;
+ } else {
+ heci_hdr.length = priv_cb->request_buffer.size;
+ heci_hdr.msg_complete = 1;
+ }
+
+ heci_hdr.host_addr = dev->iamthif_file_ext.host_client_id;
+ heci_hdr.me_addr = dev->iamthif_file_ext.me_client_id;
+ heci_hdr.reserved = 0;
+ dev->iamthif_msg_buf_index += heci_hdr.length;
+ if (!heci_write_message(dev, &heci_hdr,
+ (unsigned char *)(dev->iamthif_msg_buf),
+ heci_hdr.length))
+ return -ENODEV;
+
+ if (heci_hdr.msg_complete) {
+ flow_ctrl_reduce(dev, &dev->iamthif_file_ext);
+ dev->iamthif_flow_control_pending = 1;
+ dev->iamthif_state = HECI_IAMTHIF_FLOW_CONTROL;
+ DBG("add pthi cb to write waiting list\n");
+ dev->iamthif_current_cb = priv_cb;
+ dev->iamthif_file_object = priv_cb->file_object;
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_waiting_list.heci_cb.cb_list);
+ } else {
+ DBG("message does not complete, "
+ "so add pthi cb to write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ } else {
+ if (!(dev->host_buffer_is_empty))
+ DBG("host buffer is not empty");
+
+ DBG("No flow control credentials, "
+ "so add iamthif cb to write list.\n");
+ list_add_tail(&priv_cb->cb_list,
+ &dev->write_list.heci_cb.cb_list);
+ }
+ return rets;
+}
+
+/**
+ * iamthif_ioctl_send_msg - send cmd data to pthi client
+ * @dev -Device object for our driver
+ * @return :
+ * 0 on success,
+ * negative on failure.
+ */
+void run_next_iamthif_cmd(struct iamt_heci_device *dev)
+{
+ struct heci_file_private *file_ext_tmp = NULL;
+ struct heci_cb_private *priv_cb_pos = NULL;
+ struct heci_cb_private *priv_cb_next = NULL;
+ int status = 0;
+
+ if (!dev)
+ return;
+
+ dev->iamthif_msg_buf_size = 0;
+ dev->iamthif_msg_buf_index = 0;
+ dev->iamthif_canceled = 0;
+ dev->iamthif_ioctl = 1;
+ dev->iamthif_state = HECI_IAMTHIF_IDLE;
+ dev->iamthif_timer = 0;
+ dev->iamthif_file_object = NULL;
+
+ if (dev->pthi_cmd_list.status == 0 &&
+ !list_empty(&dev->pthi_cmd_list.heci_cb.cb_list)) {
+ DBG("complete pthi cmd_list cb.\n");
+
+ list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
+ &dev->pthi_cmd_list.heci_cb.cb_list, cb_list) {
+ list_del(&priv_cb_pos->cb_list);
+ file_ext_tmp = (struct heci_file_private *)
+ priv_cb_pos->file_private;
+
+ if ((file_ext_tmp) &&
+ (file_ext_tmp == &dev->iamthif_file_ext)) {
+ status = pthi_write(dev, priv_cb_pos);
+ if (status != 0) {
+ DBG("pthi write failed status = %d\n",
+ status);
+ return;
+ }
+ break;
+ }
+ }
+ }
+}
+
+/**
+ * heci_free_cb_private: free heci_cb_private related memory
+ *
+ * @priv_cb - heci callback struct
+ */
+void heci_free_cb_private(struct heci_cb_private *priv_cb)
+{
+ if (priv_cb == NULL)
+ return;
+
+ kfree(priv_cb->request_buffer.data);
+ kfree(priv_cb->response_buffer.data);
+ kfree(priv_cb);
+}
+
^ permalink raw reply related [flat|nested] 42+ messages in thread
end of thread, other threads:[~2008-08-14 0:30 UTC | newest]
Thread overview: 42+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2007-12-11 17:32 [PATCH] Intel Management Engine Interface Anas Nashif
2007-12-11 18:14 ` Andi Kleen
2007-12-11 18:38 ` Anas Nashif
2007-12-11 18:53 ` Andi Kleen
2007-12-11 19:02 ` David Miller
2007-12-11 19:47 ` Andi Kleen
2007-12-11 19:06 ` Anas Nashif
2007-12-11 19:48 ` Andi Kleen
2007-12-12 15:00 ` Mark Lord
2007-12-12 16:17 ` Andi Kleen
2007-12-12 8:48 ` Alexander E. Patrakov
2008-05-20 0:11 Anas Nashif
2008-05-20 0:28 ` Andrew Morton
2008-05-20 19:02 ` Gabriel C
2008-05-22 16:51 ` Pavel Machek
2008-05-20 15:42 ` Maxim Levitsky
2008-05-20 20:35 ` Carlos R. Mafra
2008-05-20 22:27 ` Jiri Slaby
2008-05-23 7:04 ` Pavel Machek
2008-07-17 18:27 Marcin Obara
2008-07-18 0:00 ` Randy Dunlap
2008-07-18 5:44 ` Marcin Obara
2008-07-18 17:39 ` Marcin Obara
2008-07-18 19:23 ` Marcin Obara
2008-07-18 20:30 ` Marcin Obara
2008-07-23 18:00 ` Marcin Obara
2008-08-11 19:23 ` Marcin Obara
2008-08-12 4:53 ` Andrew Morton
2008-08-12 16:15 ` Jiri Slaby
2008-08-12 19:24 ` Marcin Obara
2008-08-12 19:24 ` Alan Cox
2008-08-12 21:03 ` Arjan van de Ven
2008-08-13 0:58 ` Greg KH
2008-08-13 7:16 ` Marcin Obara
2008-08-13 18:18 ` Greg KH
2008-08-13 19:48 ` Marcin Obara
2008-08-14 0:23 ` Greg KH
2008-07-18 9:27 ` Andi Kleen
2008-07-18 10:51 ` Marcin Obara
2008-07-18 11:02 ` Andi Kleen
2008-07-18 11:33 ` Marcin Obara
2008-08-06 16:56 ` Pavel Machek
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