* [PATCH V3 0/2] initial submit of Microsemi smarpqi driver
@ 2016-06-16 22:48 Don Brace
2016-06-16 22:48 ` [PATCH V3 1/2] smartpqi: initial commit of Microsemi smartpqi driver Don Brace
2016-06-16 22:48 ` [PATCH V3 2/2] aacraid: remove wildcard for series 9 controllers Don Brace
0 siblings, 2 replies; 7+ messages in thread
From: Don Brace @ 2016-06-16 22:48 UTC (permalink / raw)
To: jejb, Viswas.G, Mahesh.Rajashekhara, hch, scott.teel,
Kevin.Barnett, Justin.Lindley, scott.benesh, elliott
Cc: linux-scsi
This driver is based on Linus's tree
This initial commit contains WIP of Microsemi's smartpqi module.
- add smartpqi to kernel.org
- remove PCI IDs from aacraid driver
- Depends on adoption of smartpqi driver
Changes since V2
- Corrected make ARCH=s390 kbuild test robot issue.
- Answers to Hannes's Review posted in a separate reply
Changes since V1
- Corrected make ARCH=i386 kbuild test robot issue.
Changes since initial upload
- Forgot to give correct ownership to the author.
---
Don Brace (1):
aacraid: remove wildcard for series 9 controllers
Kevin Barnett (1):
smartpqi: initial commit of Microsemi smartpqi driver
MAINTAINERS | 11
drivers/scsi/Kconfig | 1
drivers/scsi/Makefile | 1
drivers/scsi/aacraid/linit.c | 2
drivers/scsi/smartpqi/Kconfig | 50
drivers/scsi/smartpqi/Makefile | 3
drivers/scsi/smartpqi/smartpqi.h | 1135 ++++
drivers/scsi/smartpqi/smartpqi_init.c | 6824 ++++++++++++++++++++++++
drivers/scsi/smartpqi/smartpqi_sas_transport.c | 350 +
drivers/scsi/smartpqi/smartpqi_sis.c | 394 +
drivers/scsi/smartpqi/smartpqi_sis.h | 32
11 files changed, 8801 insertions(+), 2 deletions(-)
create mode 100644 drivers/scsi/smartpqi/Kconfig
create mode 100644 drivers/scsi/smartpqi/Makefile
create mode 100644 drivers/scsi/smartpqi/smartpqi.h
create mode 100644 drivers/scsi/smartpqi/smartpqi_init.c
create mode 100644 drivers/scsi/smartpqi/smartpqi_sas_transport.c
create mode 100644 drivers/scsi/smartpqi/smartpqi_sis.c
create mode 100644 drivers/scsi/smartpqi/smartpqi_sis.h
--
Signature
^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH V3 1/2] smartpqi: initial commit of Microsemi smartpqi driver
2016-06-16 22:48 [PATCH V3 0/2] initial submit of Microsemi smarpqi driver Don Brace
@ 2016-06-16 22:48 ` Don Brace
2016-06-17 9:57 ` Johannes Thumshirn
2016-06-16 22:48 ` [PATCH V3 2/2] aacraid: remove wildcard for series 9 controllers Don Brace
1 sibling, 1 reply; 7+ messages in thread
From: Don Brace @ 2016-06-16 22:48 UTC (permalink / raw)
To: jejb, Viswas.G, Mahesh.Rajashekhara, hch, scott.teel,
Kevin.Barnett, Justin.Lindley, scott.benesh, elliott
Cc: linux-scsi
From: Kevin Barnett <kevin.barnett@microsemi.com>
This initial commit contains WIP of Microsemi's smartpqi module.
Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
---
MAINTAINERS | 11
drivers/scsi/Kconfig | 1
drivers/scsi/Makefile | 1
drivers/scsi/smartpqi/Kconfig | 50
drivers/scsi/smartpqi/Makefile | 3
drivers/scsi/smartpqi/smartpqi.h | 1135 ++++
drivers/scsi/smartpqi/smartpqi_init.c | 6824 ++++++++++++++++++++++++
drivers/scsi/smartpqi/smartpqi_sas_transport.c | 350 +
drivers/scsi/smartpqi/smartpqi_sis.c | 394 +
drivers/scsi/smartpqi/smartpqi_sis.h | 32
10 files changed, 8801 insertions(+)
create mode 100644 drivers/scsi/smartpqi/Kconfig
create mode 100644 drivers/scsi/smartpqi/Makefile
create mode 100644 drivers/scsi/smartpqi/smartpqi.h
create mode 100644 drivers/scsi/smartpqi/smartpqi_init.c
create mode 100644 drivers/scsi/smartpqi/smartpqi_sas_transport.c
create mode 100644 drivers/scsi/smartpqi/smartpqi_sis.c
create mode 100644 drivers/scsi/smartpqi/smartpqi_sis.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 16700e4..eed83a7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5288,6 +5288,17 @@ T: git git://linuxtv.org/anttip/media_tree.git
S: Maintained
F: drivers/media/dvb-frontends/hd29l2*
+MICROSEMI SMART ARRAY SMARTPQI DRIVER (smartpqi)
+M: Don Brace <don.brace@microsemi.com>
+L: esc.storagedev@microsemi.com
+L: linux-scsi@vger.kernel.org
+S: Supported
+F: drivers/scsi/smartpqi/smartpqi*.[ch]
+F: drivers/scsi/smartpqi/Kconfig
+F: drivers/scsi/smartpqi/Makefile
+F: include/linux/cciss*.h
+F: include/uapi/linux/cciss*.h
+
HEWLETT-PACKARD SMART ARRAY RAID DRIVER (hpsa)
M: Don Brace <don.brace@microsemi.com>
L: iss_storagedev@hp.com
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 98e5d51..903a32d 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -540,6 +540,7 @@ config SCSI_ARCMSR
source "drivers/scsi/esas2r/Kconfig"
source "drivers/scsi/megaraid/Kconfig.megaraid"
source "drivers/scsi/mpt3sas/Kconfig"
+source "drivers/scsi/smartpqi/Kconfig"
source "drivers/scsi/ufs/Kconfig"
config SCSI_HPTIOP
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 862ab4e..51cb443 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -94,6 +94,7 @@ obj-$(CONFIG_SCSI_PAS16) += pas16.o
obj-$(CONFIG_SCSI_T128) += t128.o
obj-$(CONFIG_SCSI_DMX3191D) += dmx3191d.o
obj-$(CONFIG_SCSI_HPSA) += hpsa.o
+obj-$(CONFIG_SCSI_SMARTPQI) += smartpqi/
obj-$(CONFIG_SCSI_DTC3280) += dtc.o
obj-$(CONFIG_SCSI_SYM53C8XX_2) += sym53c8xx_2/
obj-$(CONFIG_SCSI_ZALON) += zalon7xx.o
diff --git a/drivers/scsi/smartpqi/Kconfig b/drivers/scsi/smartpqi/Kconfig
new file mode 100644
index 0000000..7b312b1
--- /dev/null
+++ b/drivers/scsi/smartpqi/Kconfig
@@ -0,0 +1,50 @@
+#
+# Kernel configuration file for the SMARTPQI
+#
+# Copyright (c) 2016 Microsemi Corporation
+# Copyright (c) 2016 PMC-Sierra, Inc.
+# (mailto:esc.storagedev@microsemi.com)
+
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; version 2
+# of the License.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+# NO WARRANTY
+# THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
+# CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
+# LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
+# MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
+# solely responsible for determining the appropriateness of using and
+# distributing the Program and assumes all risks associated with its
+# exercise of rights under this Agreement, including but not limited to
+# the risks and costs of program errors, damage to or loss of data,
+# programs or equipment, and unavailability or interruption of operations.
+
+# DISCLAIMER OF LIABILITY
+# NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
+# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), 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 OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
+# HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
+
+config SCSI_SMARTPQI
+ tristate "Microsemi PQI Driver"
+ default n
+ depends on PCI && SCSI
+ select SCSI_SAS_ATTRS
+ select RAID_ATTRS
+ ---help---
+ This driver supports Microsemi PQI controllers.
+
+ <http://www.microsemi.com>
+
+ To compile this driver as a module, choose M here: the
+ module will be called smartpqi
diff --git a/drivers/scsi/smartpqi/Makefile b/drivers/scsi/smartpqi/Makefile
new file mode 100644
index 0000000..0f42a22
--- /dev/null
+++ b/drivers/scsi/smartpqi/Makefile
@@ -0,0 +1,3 @@
+ccflags-y += -I.
+obj-m += smartpqi.o
+smartpqi-objs := smartpqi_init.o smartpqi_sis.o smartpqi_sas_transport.o
diff --git a/drivers/scsi/smartpqi/smartpqi.h b/drivers/scsi/smartpqi/smartpqi.h
new file mode 100644
index 0000000..af0a03a
--- /dev/null
+++ b/drivers/scsi/smartpqi/smartpqi.h
@@ -0,0 +1,1135 @@
+/*
+ * driver for Microsemi PQI-based storage controllers
+ * Copyright (c) 2016 Microsemi Corporation
+ * Copyright (c) 2016 PMC-Sierra, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more details.
+ *
+ * Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
+ *
+ */
+
+#if !defined(_SMARTPQI_H)
+#define _SMARTPQI_H
+
+#pragma pack(1)
+
+#define PQI_DEVICE_SIGNATURE "PQI DREG"
+
+/* This structure is defined by the PQI specification. */
+struct pqi_device_registers {
+ __le64 signature;
+ u8 function_and_status_code;
+ u8 reserved[7];
+ u8 max_admin_iq_elements;
+ u8 max_admin_oq_elements;
+ u8 admin_iq_element_length; /* in 16-byte units */
+ u8 admin_oq_element_length; /* in 16-byte units */
+ __le16 max_reset_timeout; /* in 100-millisecond units */
+ u8 reserved1[2];
+ __le32 legacy_intx_status;
+ __le32 legacy_intx_mask_set;
+ __le32 legacy_intx_mask_clear;
+ u8 reserved2[28];
+ __le32 device_status;
+ u8 reserved3[4];
+ __le64 admin_iq_pi_offset;
+ __le64 admin_oq_ci_offset;
+ __le64 admin_iq_element_array_addr;
+ __le64 admin_oq_element_array_addr;
+ __le64 admin_iq_ci_addr;
+ __le64 admin_oq_pi_addr;
+ u8 admin_iq_num_elements;
+ u8 admin_oq_num_elements;
+ __le16 admin_queue_int_msg_num;
+ u8 reserved4[4];
+ __le32 device_error;
+ u8 reserved5[4];
+ __le64 error_details;
+ __le32 device_reset;
+ __le32 power_action;
+ u8 reserved6[104];
+};
+
+/*
+ * controller registers
+ *
+ * These are defined by the PMC implementation.
+ *
+ * Some registers (those named sis_*) are only used when in
+ * legacy SIS mode before we transition the controller into
+ * PQI mode. There are a number of other SIS mode registers,
+ * but we don't use them, so only the SIS registers that we
+ * care about are defined here. The offsets mentioned in the
+ * comments are the offsets from the PCIe BAR 0.
+ */
+struct pqi_ctrl_registers {
+ u8 reserved[0x20];
+ __le32 sis_host_to_ctrl_doorbell; /* 20h */
+ u8 reserved1[0x34 - (0x20 + sizeof(__le32))];
+ __le32 sis_interrupt_mask; /* 34h */
+ u8 reserved2[0x9c - (0x34 + sizeof(__le32))];
+ __le32 sis_ctrl_to_host_doorbell; /* 9Ch */
+ u8 reserved3[0xa0 - (0x9c + sizeof(__le32))];
+ __le32 sis_ctrl_to_host_doorbell_clear; /* A0h */
+ u8 reserved4[0xbc - (0xa0 + sizeof(__le32))];
+ __le32 sis_firmware_status; /* BCh */
+ u8 reserved5[0x1000 - (0xbc + sizeof(__le32))];
+ __le32 sis_mailbox[8]; /* 1000h */
+ u8 reserved6[0x4000 - (0x1000 + (sizeof(__le32) * 8))];
+ /*
+ * The PQI spec states that the PQI registers should be at
+ * offset 0 from the PCIe BAR 0. However, we can't map
+ * them at offset 0 because that would break compatibility
+ * with the SIS registers. So we map them at offset 4000h.
+ */
+ struct pqi_device_registers pqi_registers; /* 4000h */
+};
+
+#define PQI_DEVICE_REGISTERS_OFFSET 0x4000
+
+enum pqi_io_path {
+ RAID_PATH = 0,
+ AIO_PATH = 1
+};
+
+struct pqi_sg_descriptor {
+ __le64 address;
+ __le32 length;
+ __le32 flags;
+};
+
+/* manifest constants for the flags field of pqi_sg_descriptor */
+#define CISS_SG_LAST 0x40000000
+#define CISS_SG_CHAIN 0x80000000
+
+struct pqi_iu_header {
+ u8 iu_type;
+ u8 reserved;
+ __le16 iu_length; /* in bytes - does not include the length */
+ /* of this header */
+ __le16 response_queue_id; /* specifies the OQ where the */
+ /* response IU is to be delivered */
+ u8 work_area[2]; /* reserved for driver use */
+};
+
+/*
+ * According to the PQI spec, the IU header is only the first 4 bytes of our
+ * pqi_iu_header structure.
+ */
+#define PQI_REQUEST_HEADER_LENGTH 4
+
+struct pqi_general_admin_request {
+ struct pqi_iu_header header;
+ __le16 request_id;
+ u8 function_code;
+ union {
+ struct {
+ u8 reserved[33];
+ __le32 buffer_length;
+ struct pqi_sg_descriptor sg_descriptor;
+ } report_device_capability;
+
+ struct {
+ u8 reserved;
+ __le16 queue_id;
+ u8 reserved1[2];
+ __le64 element_array_addr;
+ __le64 ci_addr;
+ __le16 num_elements;
+ __le16 element_length;
+ u8 queue_protocol;
+ u8 reserved2[23];
+ __le32 vendor_specific;
+ } create_operational_iq;
+
+ struct {
+ u8 reserved;
+ __le16 queue_id;
+ u8 reserved1[2];
+ __le64 element_array_addr;
+ __le64 pi_addr;
+ __le16 num_elements;
+ __le16 element_length;
+ u8 queue_protocol;
+ u8 reserved2[3];
+ __le16 int_msg_num;
+ __le16 coalescing_count;
+ __le32 min_coalescing_time;
+ __le32 max_coalescing_time;
+ u8 reserved3[8];
+ __le32 vendor_specific;
+ } create_operational_oq;
+
+ struct {
+ u8 reserved;
+ __le16 queue_id;
+ u8 reserved1[50];
+ } delete_operational_queue;
+
+ struct {
+ u8 reserved;
+ __le16 queue_id;
+ u8 reserved1[46];
+ __le32 vendor_specific;
+ } change_operational_iq_properties;
+
+ } data;
+};
+
+struct pqi_general_admin_response {
+ struct pqi_iu_header header;
+ __le16 request_id;
+ u8 function_code;
+ u8 status;
+ union {
+ struct {
+ u8 status_descriptor[4];
+ __le64 iq_pi_offset;
+ u8 reserved[40];
+ } create_operational_iq;
+
+ struct {
+ u8 status_descriptor[4];
+ __le64 oq_ci_offset;
+ u8 reserved[40];
+ } create_operational_oq;
+ } data;
+};
+
+struct pqi_iu_layer_descriptor {
+ u8 inbound_spanning_supported : 1;
+ u8 reserved : 7;
+ u8 reserved1[5];
+ __le16 max_inbound_iu_length;
+ u8 outbound_spanning_supported : 1;
+ u8 reserved2 : 7;
+ u8 reserved3[5];
+ __le16 max_outbound_iu_length;
+};
+
+struct pqi_device_capability {
+ __le16 data_length;
+ u8 reserved[6];
+ u8 iq_arbitration_priority_support_bitmask;
+ u8 maximum_aw_a;
+ u8 maximum_aw_b;
+ u8 maximum_aw_c;
+ u8 max_arbitration_burst : 3;
+ u8 reserved1 : 4;
+ u8 iqa : 1;
+ u8 reserved2[2];
+ u8 iq_freeze : 1;
+ u8 reserved3 : 7;
+ __le16 max_inbound_queues;
+ __le16 max_elements_per_iq;
+ u8 reserved4[4];
+ __le16 max_iq_element_length;
+ __le16 min_iq_element_length;
+ u8 reserved5[2];
+ __le16 max_outbound_queues;
+ __le16 max_elements_per_oq;
+ __le16 intr_coalescing_time_granularity;
+ __le16 max_oq_element_length;
+ __le16 min_oq_element_length;
+ u8 reserved6[24];
+ struct pqi_iu_layer_descriptor iu_layer_descriptors[32];
+};
+
+#define PQI_MAX_EMBEDDED_SG_DESCRIPTORS 4
+
+struct pqi_raid_path_request {
+ struct pqi_iu_header header;
+ __le16 request_id;
+ __le16 nexus_id;
+ __le32 buffer_length;
+ u8 lun_number[8];
+ __le16 protocol_spec;
+ u8 data_direction : 2;
+ u8 partial : 1;
+ u8 reserved1 : 4;
+ u8 fence : 1;
+ __le16 error_index;
+ u8 reserved2;
+ u8 task_attribute : 3;
+ u8 command_priority : 4;
+ u8 reserved3 : 1;
+ u8 reserved4 : 2;
+ u8 additional_cdb_bytes_usage : 3;
+ u8 reserved5 : 3;
+ u8 cdb[16];
+ u8 additional_cdb_bytes[16];
+ struct pqi_sg_descriptor
+ sg_descriptors[PQI_MAX_EMBEDDED_SG_DESCRIPTORS];
+};
+
+struct pqi_aio_path_request {
+ struct pqi_iu_header header;
+ __le16 request_id;
+ u8 reserved1[2];
+ __le32 nexus_id;
+ __le32 buffer_length;
+ u8 data_direction : 2;
+ u8 partial : 1;
+ u8 memory_type : 1;
+ u8 fence : 1;
+ u8 encryption_enable : 1;
+ u8 reserved2 : 2;
+ u8 task_attribute : 3;
+ u8 command_priority : 4;
+ u8 reserved3 : 1;
+ __le16 data_encryption_key_index;
+ __le32 encrypt_tweak_lower;
+ __le32 encrypt_tweak_upper;
+ u8 cdb[16];
+ __le16 error_index;
+ u8 num_sg_descriptors;
+ u8 cdb_length;
+ u8 lun_number[8];
+ u8 reserved4[4];
+ struct pqi_sg_descriptor
+ sg_descriptors[PQI_MAX_EMBEDDED_SG_DESCRIPTORS];
+};
+
+struct pqi_io_response {
+ struct pqi_iu_header header;
+ __le16 request_id;
+ __le16 error_index;
+ u8 reserved2[4];
+};
+
+struct pqi_general_management_request {
+ struct pqi_iu_header header;
+ __le16 request_id;
+ union {
+ struct {
+ u8 reserved[2];
+ __le32 buffer_length;
+ struct pqi_sg_descriptor sg_descriptors[3];
+ } report_event_configuration;
+
+ struct {
+ __le16 global_event_oq_id;
+ __le32 buffer_length;
+ struct pqi_sg_descriptor sg_descriptors[3];
+ } set_event_configuration;
+ } data;
+};
+
+struct pqi_event_descriptor {
+ u8 event_type;
+ u8 reserved;
+ __le16 oq_id;
+};
+
+struct pqi_event_config {
+ u8 reserved[2];
+ u8 num_event_descriptors;
+ u8 reserved1;
+ struct pqi_event_descriptor descriptors[1];
+};
+
+#define PQI_MAX_EVENT_DESCRIPTORS 255
+
+struct pqi_event_response {
+ struct pqi_iu_header header;
+ u8 event_type;
+ u8 reserved2 : 7;
+ u8 request_acknowlege : 1;
+ __le16 event_id;
+ __le32 additional_event_id;
+ u8 data[16];
+};
+
+struct pqi_event_acknowledge_request {
+ struct pqi_iu_header header;
+ u8 event_type;
+ u8 reserved2;
+ __le16 event_id;
+ __le32 additional_event_id;
+};
+
+struct pqi_task_management_request {
+ struct pqi_iu_header header;
+ __le16 request_id;
+ __le16 nexus_id;
+ u8 reserved[4];
+ u8 lun_number[8];
+ __le16 protocol_spec;
+ __le16 outbound_queue_id_to_manage;
+ __le16 request_id_to_manage;
+ u8 task_management_function;
+ u8 reserved2 : 7;
+ u8 fence : 1;
+};
+
+#define SOP_TASK_MANAGEMENT_LUN_RESET 0x8
+#define PQI_ABORT_TIMEOUT_MSECS (20 * 1000)
+
+struct pqi_task_management_response {
+ struct pqi_iu_header header;
+ __le16 request_id;
+ __le16 nexus_id;
+ u8 additional_response_info[3];
+ u8 response_code;
+};
+
+struct pqi_aio_error_info {
+ u8 status;
+ u8 service_response;
+ u8 data_present;
+ u8 reserved;
+ __le32 residual_count;
+ __le16 data_length;
+ __le16 reserved1;
+ u8 data[256];
+};
+
+struct pqi_raid_error_info {
+ u8 data_in_result;
+ u8 data_out_result;
+ u8 reserved[3];
+ u8 status;
+ __le16 status_qualifier;
+ __le16 sense_data_length;
+ __le16 response_data_length;
+ __le32 data_in_transferred;
+ __le32 data_out_transferred;
+ u8 data[256];
+};
+
+#define PQI_REQUEST_IU_TASK_MANAGEMENT 0x13
+#define PQI_REQUEST_IU_RAID_PATH_IO 0x14
+#define PQI_REQUEST_IU_AIO_PATH_IO 0x15
+#define PQI_REQUEST_IU_GENERAL_ADMIN 0x60
+#define PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG 0x72
+#define PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG 0x73
+#define PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT 0xf6
+
+#define PQI_RESPONSE_IU_GENERAL_MANAGEMENT 0x81
+#define PQI_RESPONSE_IU_TASK_MANAGEMENT 0x93
+#define PQI_RESPONSE_IU_GENERAL_ADMIN 0xe0
+#define PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS 0xf0
+#define PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS 0xf1
+#define PQI_RESPONSE_IU_RAID_PATH_IO_ERROR 0xf2
+#define PQI_RESPONSE_IU_AIO_PATH_IO_ERROR 0xf3
+#define PQI_RESPONSE_IU_AIO_PATH_DISABLED 0xf4
+#define PQI_RESPONSE_IU_VENDOR_EVENT 0xf5
+
+#define PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY 0x0
+#define PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ 0x10
+#define PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ 0x11
+#define PQI_GENERAL_ADMIN_FUNCTION_DELETE_IQ 0x12
+#define PQI_GENERAL_ADMIN_FUNCTION_DELETE_OQ 0x13
+#define PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY 0x14
+
+#define PQI_GENERAL_ADMIN_STATUS_SUCCESS 0x0
+
+#define PQI_IQ_PROPERTY_IS_AIO_QUEUE 0x1
+
+#define PQI_GENERAL_ADMIN_IU_LENGTH 0x3c
+#define PQI_PROTOCOL_SOP 0x0
+
+#define PQI_DATA_IN_OUT_GOOD 0x0
+#define PQI_DATA_IN_OUT_UNDERFLOW 0x1
+#define PQI_DATA_IN_OUT_BUFFER_ERROR 0x40
+#define PQI_DATA_IN_OUT_BUFFER_OVERFLOW 0x41
+#define PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA 0x42
+#define PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE 0x43
+#define PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR 0x60
+#define PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT 0x61
+#define PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED 0x62
+#define PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED 0x63
+#define PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED 0x64
+#define PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST 0x65
+#define PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION 0x66
+#define PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED 0x67
+#define PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ 0x6F
+#define PQI_DATA_IN_OUT_ERROR 0xf0
+#define PQI_DATA_IN_OUT_PROTOCOL_ERROR 0xf1
+#define PQI_DATA_IN_OUT_HARDWARE_ERROR 0xf2
+#define PQI_DATA_IN_OUT_UNSOLICITED_ABORT 0xf3
+#define PQI_DATA_IN_OUT_ABORTED 0xf4
+#define PQI_DATA_IN_OUT_TIMEOUT 0xf5
+
+#define CISS_CMD_STATUS_SUCCESS 0x0
+#define CISS_CMD_STATUS_TARGET_STATUS 0x1
+#define CISS_CMD_STATUS_DATA_UNDERRUN 0x2
+#define CISS_CMD_STATUS_DATA_OVERRUN 0x3
+#define CISS_CMD_STATUS_INVALID 0x4
+#define CISS_CMD_STATUS_PROTOCOL_ERROR 0x5
+#define CISS_CMD_STATUS_HARDWARE_ERROR 0x6
+#define CISS_CMD_STATUS_CONNECTION_LOST 0x7
+#define CISS_CMD_STATUS_ABORTED 0x8
+#define CISS_CMD_STATUS_ABORT_FAILED 0x9
+#define CISS_CMD_STATUS_UNSOLICITED_ABORT 0xa
+#define CISS_CMD_STATUS_TIMEOUT 0xb
+#define CISS_CMD_STATUS_UNABORTABLE 0xc
+#define CISS_CMD_STATUS_TMF 0xd
+#define CISS_CMD_STATUS_AIO_DISABLED 0xe
+
+#define PQI_NUM_EVENT_QUEUE_ELEMENTS 32
+#define PQI_EVENT_OQ_ELEMENT_LENGTH sizeof(struct pqi_event_response)
+
+#define PQI_EVENT_TYPE_HOTPLUG 0x1
+#define PQI_EVENT_TYPE_HARDWARE 0x2
+#define PQI_EVENT_TYPE_PHYSICAL_DEVICE 0x4
+#define PQI_EVENT_TYPE_LOGICAL_DEVICE 0x5
+#define PQI_EVENT_TYPE_AIO_STATE_CHANGE 0xfd
+#define PQI_EVENT_TYPE_AIO_CONFIG_CHANGE 0xfe
+#define PQI_EVENT_TYPE_HEARTBEAT 0xff
+
+#pragma pack()
+
+#define PQI_ERROR_BUFFER_ELEMENT_LENGTH \
+ sizeof(struct pqi_raid_error_info)
+
+/* these values are based on our implementation */
+#define PQI_ADMIN_IQ_NUM_ELEMENTS 8
+#define PQI_ADMIN_OQ_NUM_ELEMENTS 20
+#define PQI_ADMIN_IQ_ELEMENT_LENGTH 64
+#define PQI_ADMIN_OQ_ELEMENT_LENGTH 64
+
+#define PQI_OPERATIONAL_IQ_ELEMENT_LENGTH 128
+#define PQI_OPERATIONAL_OQ_ELEMENT_LENGTH 16
+
+#define PQI_MIN_MSIX_VECTORS 1
+#define PQI_MAX_MSIX_VECTORS 64
+
+/* these values are defined by the PQI spec */
+#define PQI_MAX_NUM_ELEMENTS_ADMIN_QUEUE 255
+#define PQI_MAX_NUM_ELEMENTS_OPERATIONAL_QUEUE 65535
+#define PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT 64
+#define PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT 16
+#define PQI_ADMIN_INDEX_ALIGNMENT 64
+#define PQI_OPERATIONAL_INDEX_ALIGNMENT 4
+
+#define PQI_MIN_OPERATIONAL_QUEUE_ID 1
+#define PQI_MAX_OPERATIONAL_QUEUE_ID 65535
+
+#define PQI_AIO_SERV_RESPONSE_COMPLETE 0
+#define PQI_AIO_SERV_RESPONSE_FAILURE 1
+#define PQI_AIO_SERV_RESPONSE_TMF_COMPLETE 2
+#define PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED 3
+#define PQI_AIO_SERV_RESPONSE_TMF_REJECTED 4
+#define PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN 5
+
+#define PQI_AIO_STATUS_IO_ERROR 0x1
+#define PQI_AIO_STATUS_IO_ABORTED 0x2
+#define PQI_AIO_STATUS_NO_PATH_TO_DEVICE 0x3
+#define PQI_AIO_STATUS_INVALID_DEVICE 0x4
+#define PQI_AIO_STATUS_AIO_PATH_DISABLED 0xe
+#define PQI_AIO_STATUS_UNDERRUN 0x51
+#define PQI_AIO_STATUS_OVERRUN 0x75
+
+typedef u32 pqi_index_t;
+
+/* SOP data direction flags */
+#define SOP_NO_DIRECTION_FLAG 0
+#define SOP_WRITE_FLAG 1 /* host writes data to Data-Out */
+ /* buffer */
+#define SOP_READ_FLAG 2 /* host receives data from Data-In */
+ /* buffer */
+#define SOP_BIDIRECTIONAL 3 /* data is transferred from the */
+ /* Data-Out buffer and data is */
+ /* transferred to the Data-In buffer */
+
+#define SOP_TASK_ATTRIBUTE_SIMPLE 0
+#define SOP_TASK_ATTRIBUTE_HEAD_OF_QUEUE 1
+#define SOP_TASK_ATTRIBUTE_ORDERED 2
+#define SOP_TASK_ATTRIBUTE_ACA 4
+
+#define SOP_TASK_MANAGEMENT_FUNCTION_COMPLETE 0x0
+#define SOP_TASK_MANAGEMENT_FUNCTION_REJECTED 0x4
+#define SOP_TASK_MANAGEMENT_FUNCTION_FAILED 0x5
+#define SOP_TASK_MANAGEMENT_FUNCTION_SUCCEEDED 0x8
+
+/* additional CDB bytes usage field codes */
+#define SOP_ADDITIONAL_CDB_BYTES_0 0 /* 16-byte CDB */
+#define SOP_ADDITIONAL_CDB_BYTES_4 1 /* 20-byte CDB */
+#define SOP_ADDITIONAL_CDB_BYTES_8 2 /* 24-byte CDB */
+#define SOP_ADDITIONAL_CDB_BYTES_12 3 /* 28-byte CDB */
+#define SOP_ADDITIONAL_CDB_BYTES_16 4 /* 32-byte CDB */
+
+/*
+ * The purpose of this structure is to obtain proper alignment of objects in
+ * an admin queue pair.
+ */
+struct pqi_admin_queues_aligned {
+ __aligned(PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT)
+ u8 iq_element_array[PQI_ADMIN_IQ_ELEMENT_LENGTH]
+ [PQI_ADMIN_IQ_NUM_ELEMENTS];
+ __aligned(PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT)
+ u8 oq_element_array[PQI_ADMIN_OQ_ELEMENT_LENGTH]
+ [PQI_ADMIN_OQ_NUM_ELEMENTS];
+ __aligned(PQI_ADMIN_INDEX_ALIGNMENT) pqi_index_t iq_ci;
+ __aligned(PQI_ADMIN_INDEX_ALIGNMENT) pqi_index_t oq_pi;
+};
+
+struct pqi_admin_queues {
+ void *iq_element_array;
+ void *oq_element_array;
+ volatile pqi_index_t *iq_ci;
+ volatile pqi_index_t *oq_pi;
+ dma_addr_t iq_element_array_bus_addr;
+ dma_addr_t oq_element_array_bus_addr;
+ dma_addr_t iq_ci_bus_addr;
+ dma_addr_t oq_pi_bus_addr;
+ __le32 __iomem *iq_pi;
+ pqi_index_t iq_pi_copy;
+ __le32 __iomem *oq_ci;
+ pqi_index_t oq_ci_copy;
+ struct task_struct *task;
+ u16 int_msg_num;
+};
+
+struct pqi_queue_group {
+ struct pqi_ctrl_info *ctrl_info; /* backpointer */
+ u16 iq_id[2];
+ u16 oq_id;
+ u16 int_msg_num;
+ void *iq_element_array[2];
+ void *oq_element_array;
+ dma_addr_t iq_element_array_bus_addr[2];
+ dma_addr_t oq_element_array_bus_addr;
+ __le32 __iomem *iq_pi[2];
+ pqi_index_t iq_pi_copy[2];
+ volatile pqi_index_t *iq_ci[2];
+ volatile pqi_index_t *oq_pi;
+ dma_addr_t iq_ci_bus_addr[2];
+ dma_addr_t oq_pi_bus_addr;
+ __le32 __iomem *oq_ci;
+ pqi_index_t oq_ci_copy;
+ spinlock_t submit_lock[2]; /* protect submission queue */
+ struct list_head request_list[2];
+};
+
+struct pqi_event_queue {
+ u16 oq_id;
+ u16 int_msg_num;
+ void *oq_element_array;
+ volatile pqi_index_t *oq_pi;
+ dma_addr_t oq_element_array_bus_addr;
+ dma_addr_t oq_pi_bus_addr;
+ __le32 __iomem *oq_ci;
+ pqi_index_t oq_ci_copy;
+};
+
+#define PQI_DEFAULT_QUEUE_GROUP 0
+#define PQI_MAX_QUEUE_GROUPS PQI_MAX_MSIX_VECTORS
+
+struct pqi_encryption_info {
+ u16 data_encryption_key_index;
+ u32 encrypt_tweak_lower;
+ u32 encrypt_tweak_upper;
+};
+
+#define PQI_MAX_OUTSTANDING_REQUESTS ((u32)~0)
+#define PQI_MAX_TRANSFER_SIZE (4 * 1024U * 1024U)
+
+#define RAID_MAP_MAX_ENTRIES 1024
+
+#define PQI_RESERVED_IO_SLOTS_LUN_RESET 1
+#define PQI_RESERVED_IO_SLOTS_EVENT_ACK 1
+#define PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS 3
+#define PQI_RESERVED_IO_SLOTS \
+ (PQI_RESERVED_IO_SLOTS_LUN_RESET + PQI_RESERVED_IO_SLOTS_EVENT_ACK + \
+ PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS)
+
+#define PQI_PHYSICAL_DEVICE_BUS 0
+#define PQI_RAID_VOLUME_BUS 1
+#define PQI_HBA_BUS 2
+#define PQI_MAX_BUS PQI_HBA_BUS
+
+#pragma pack(1)
+
+struct report_lun_header {
+ __be32 list_length;
+ u8 extended_response;
+ u8 reserved[3];
+};
+
+struct report_log_lun_extended_entry {
+ u8 lunid[8];
+ u8 volume_id[16];
+};
+
+struct report_log_lun_extended {
+ struct report_lun_header header;
+ struct report_log_lun_extended_entry lun_entries[1];
+};
+
+struct report_phys_lun_extended_entry {
+ u8 lunid[8];
+ __be64 wwid;
+ u8 device_type;
+ u8 device_flags;
+ u8 lun_count; /* number of LUNs in a multi-LUN device */
+ u8 redundant_paths;
+ u32 aio_handle;
+};
+
+/* for device_flags field of struct report_phys_lun_extended_entry */
+#define REPORT_PHYS_LUN_DEV_FLAG_NON_DISK 0x1
+#define REPORT_PHYS_LUN_DEV_FLAG_AIO_ENABLED 0x8
+
+struct report_phys_lun_extended {
+ struct report_lun_header header;
+ struct report_phys_lun_extended_entry lun_entries[1];
+};
+
+struct raid_map_disk_data {
+ u32 aio_handle;
+ u8 xor_mult[2];
+ u8 reserved[2];
+};
+
+/* constants for flags field of RAID map */
+#define RAID_MAP_ENCRYPTION_ENABLED 0x1
+
+struct raid_map {
+ __le32 structure_size; /* size of entire structure in bytes */
+ __le32 volume_blk_size; /* bytes / block in the volume */
+ __le64 volume_blk_cnt; /* logical blocks on the volume */
+ u8 phys_blk_shift; /* shift factor to convert between */
+ /* units of logical blocks and */
+ /* physical disk blocks */
+ u8 parity_rotation_shift; /* shift factor to convert between */
+ /* units of logical stripes and */
+ /* physical stripes */
+ __le16 strip_size; /* blocks used on each disk / stripe */
+ __le64 disk_starting_blk; /* first disk block used in volume */
+ __le64 disk_blk_cnt; /* disk blocks used by volume / disk */
+ __le16 data_disks_per_row; /* data disk entries / row in the map */
+ __le16 metadata_disks_per_row; /* mirror/parity disk entries / row */
+ /* in the map */
+ __le16 row_cnt; /* rows in each layout map */
+ __le16 layout_map_count; /* layout maps (1 map per */
+ /* mirror parity group) */
+ __le16 flags;
+ __le16 data_encryption_key_index;
+ u8 reserved[16];
+ struct raid_map_disk_data disk_data[RAID_MAP_MAX_ENTRIES];
+};
+
+#pragma pack()
+
+#define RAID_CTLR_LUNID "\0\0\0\0\0\0\0\0"
+
+struct pqi_scsi_dev_t {
+ int devtype; /* as reported by INQUIRY commmand */
+ u8 device_type; /* as reported by */
+ /* BMIC_IDENTIFY_PHYSICAL_DEVICE */
+ /* only valid for devtype = TYPE_DISK */
+ int bus;
+ int target;
+ int lun;
+ u8 scsi3addr[8];
+ __be64 wwid;
+ u8 volume_id[16];
+ u8 is_physical_device : 1;
+ u8 target_lun_valid : 1;
+ u8 expose_device : 1;
+ u8 no_uld_attach : 1;
+ u8 aio_enabled : 1; /* only valid for physical disks */
+ u8 device_gone : 1;
+ u8 new_device : 1;
+ u8 keep_device : 1;
+ u8 volume_offline : 1;
+ u8 vendor[8]; /* bytes 8-15 of inquiry data */
+ u8 model[16]; /* bytes 16-31 of inquiry data */
+ u64 sas_address;
+ u8 raid_level;
+ u16 queue_depth; /* max. queue_depth for this device */
+ u16 advertised_queue_depth;
+ u32 aio_handle;
+ u8 volume_status;
+ u8 active_path_index;
+ u8 path_map;
+ u8 bay;
+ u8 box[8];
+ u16 phys_connector[8];
+ int offload_configured; /* I/O accel RAID offload configured */
+ int offload_enabled; /* I/O accel RAID offload enabled */
+ int offload_enabled_pending;
+ int offload_to_mirror; /* Send next I/O accelerator RAID */
+ /* offload request to mirror drive. */
+ struct raid_map *raid_map; /* I/O accelerator RAID map */
+
+ struct pqi_sas_port *sas_port;
+ struct scsi_device *sdev;
+ bool reset_in_progress;
+
+ struct list_head scsi_device_list_entry;
+ struct list_head new_device_list_entry;
+ struct list_head add_list_entry;
+ struct list_head delete_list_entry;
+};
+
+/* VPD inquiry pages */
+#define SCSI_VPD_SUPPORTED_PAGES 0x0 /* standard page */
+#define SCSI_VPD_DEVICE_ID 0x83 /* standard page */
+#define CISS_VPD_LV_DEVICE_GEOMETRY 0xc1 /* vendor-specific page */
+#define CISS_VPD_LV_OFFLOAD_STATUS 0xc2 /* vendor-specific page */
+#define CISS_VPD_LV_STATUS 0xc3 /* vendor-specific page */
+
+#define VPD_PAGE (1 << 8)
+
+#pragma pack(1)
+
+/* structure for CISS_VPD_LV_STATUS */
+struct ciss_vpd_logical_volume_status {
+ u8 peripheral_info;
+ u8 page_code;
+ u8 reserved;
+ u8 page_length;
+ u8 volume_status;
+ u8 reserved2[3];
+ __be32 flags;
+};
+
+#pragma pack()
+
+/* constants for volume_status field of ciss_vpd_logical_volume_status */
+#define CISS_LV_OK 0
+#define CISS_LV_FAILED 1
+#define CISS_LV_NOT_CONFIGURED 2
+#define CISS_LV_DEGRADED 3
+#define CISS_LV_READY_FOR_RECOVERY 4
+#define CISS_LV_UNDERGOING_RECOVERY 5
+#define CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED 6
+#define CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM 7
+#define CISS_LV_HARDWARE_OVERHEATING 8
+#define CISS_LV_HARDWARE_HAS_OVERHEATED 9
+#define CISS_LV_UNDERGOING_EXPANSION 10
+#define CISS_LV_NOT_AVAILABLE 11
+#define CISS_LV_QUEUED_FOR_EXPANSION 12
+#define CISS_LV_DISABLED_SCSI_ID_CONFLICT 13
+#define CISS_LV_EJECTED 14
+#define CISS_LV_UNDERGOING_ERASE 15
+/* state 16 not used */
+#define CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD 17
+#define CISS_LV_UNDERGOING_RPI 18
+#define CISS_LV_PENDING_RPI 19
+#define CISS_LV_ENCRYPTED_NO_KEY 20
+/* state 21 not used */
+#define CISS_LV_UNDERGOING_ENCRYPTION 22
+#define CISS_LV_UNDERGOING_ENCRYPTION_REKEYING 23
+#define CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER 24
+#define CISS_LV_PENDING_ENCRYPTION 25
+#define CISS_LV_PENDING_ENCRYPTION_REKEYING 26
+#define CISS_LV_NOT_SUPPORTED 27
+#define CISS_LV_STATUS_UNAVAILABLE 255
+
+/* constants for flags field of ciss_vpd_logical_volume_status */
+#define CISS_LV_FLAGS_NO_HOST_IO 0x1 /* volume not available for */
+ /* host I/O */
+
+/* for SAS hosts and SAS expanders */
+struct pqi_sas_node {
+ struct device *parent_dev;
+ struct list_head port_list_head;
+};
+
+struct pqi_sas_port {
+ struct list_head port_list_entry;
+ u64 sas_address;
+ struct sas_port *port;
+ int next_phy_index;
+ struct list_head phy_list_head;
+ struct pqi_sas_node *parent_node;
+ struct sas_rphy *rphy;
+};
+
+struct pqi_sas_phy {
+ struct list_head phy_list_entry;
+ struct sas_phy *phy;
+ struct pqi_sas_port *parent_port;
+ bool added_to_port;
+};
+
+struct pqi_io_request {
+ atomic_t refcount;
+ u16 index;
+ void (*io_complete_callback)(struct pqi_io_request *io_request,
+ void *context);
+ void *context;
+ int status;
+ struct scsi_cmnd *scmd;
+ void *error_info;
+ struct pqi_sg_descriptor *sg_chain_buffer;
+ dma_addr_t sg_chain_buffer_dma_handle;
+ void *iu;
+ struct list_head request_list_entry;
+};
+
+/* for indexing into the pending_events[] field of struct pqi_ctrl_info */
+#define PQI_EVENT_HEARTBEAT 0
+#define PQI_EVENT_HOTPLUG 1
+#define PQI_EVENT_HARDWARE 2
+#define PQI_EVENT_PHYSICAL_DEVICE 3
+#define PQI_EVENT_LOGICAL_DEVICE 4
+#define PQI_EVENT_AIO_STATE_CHANGE 5
+#define PQI_EVENT_AIO_CONFIG_CHANGE 6
+#define PQI_NUM_SUPPORTED_EVENTS 7
+
+struct pqi_event {
+ bool pending;
+ u8 event_type;
+ __le16 event_id;
+ __le32 additional_event_id;
+};
+
+struct pqi_ctrl_info {
+ unsigned int ctrl_id;
+ struct pci_dev *pci_dev;
+ char firmware_version[11];
+ void __iomem *iomem_base;
+ struct pqi_ctrl_registers __iomem *registers;
+ struct pqi_device_registers __iomem *pqi_registers;
+ u32 max_sg_entries;
+ u32 config_table_offset;
+ u32 config_table_length;
+ u16 max_inbound_queues;
+ u16 max_elements_per_iq;
+ u16 max_iq_element_length;
+ u16 max_outbound_queues;
+ u16 max_elements_per_oq;
+ u16 max_oq_element_length;
+ u32 max_transfer_size;
+ u32 max_outstanding_requests;
+ u32 max_io_slots;
+ unsigned int scsi_ml_can_queue;
+ unsigned short sg_tablesize;
+ unsigned int max_sectors;
+ u32 error_buffer_length;
+ void *error_buffer;
+ dma_addr_t error_buffer_dma_handle;
+ size_t sg_chain_buffer_length;
+ unsigned int num_queue_groups;
+ unsigned int num_active_queue_groups;
+ u16 num_elements_per_iq;
+ u16 num_elements_per_oq;
+ u16 max_inbound_iu_length_per_firmware;
+ u16 max_inbound_iu_length;
+ unsigned int max_sg_per_iu;
+ void *admin_queue_memory_base;
+ u32 admin_queue_memory_length;
+ dma_addr_t admin_queue_memory_base_dma_handle;
+ void *queue_memory_base;
+ u32 queue_memory_length;
+ dma_addr_t queue_memory_base_dma_handle;
+ struct pqi_admin_queues admin_queues;
+ struct pqi_queue_group queue_groups[PQI_MAX_QUEUE_GROUPS];
+ struct pqi_event_queue event_queue;
+ int max_msix_vectors;
+ int num_msix_vectors_enabled;
+ int num_msix_vectors_initialized;
+ u32 msix_vectors[PQI_MAX_MSIX_VECTORS];
+ void *intr_data[PQI_MAX_MSIX_VECTORS];
+ int event_irq;
+ struct Scsi_Host *scsi_host;
+
+ struct mutex scan_mutex;
+ u8 inbound_spanning_supported : 1;
+ u8 outbound_spanning_supported : 1;
+ u8 pqi_mode_enabled : 1;
+ u8 controller_online : 1;
+ u8 heartbeat_timer_started : 1;
+
+ struct list_head scsi_device_list;
+ spinlock_t scsi_device_list_lock;
+
+ struct delayed_work rescan_work;
+ struct delayed_work update_time_work;
+
+ struct pqi_sas_node *sas_host;
+ u64 sas_address;
+
+ struct pqi_io_request *io_request_pool;
+ u16 next_io_request_slot;
+
+ struct pqi_event pending_events[PQI_NUM_SUPPORTED_EVENTS];
+ struct work_struct event_work;
+
+ atomic_t num_interrupts;
+ int previous_num_interrupts;
+ unsigned int num_heartbeats_requested;
+ struct timer_list heartbeat_timer;
+
+ struct semaphore sync_request_sem;
+ struct semaphore lun_reset_sem;
+};
+
+/*
+ * assume worst case: SATA queue depth of 31 minus 4 internal firmware commands
+ */
+#define PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH 27
+
+/* 0 = no limit */
+#define PQI_LOGICAL_DRIVE_DEFAULT_MAX_QUEUE_DEPTH 0
+
+/* CISS commands */
+#define CISS_READ 0xc0
+#define CISS_REPORT_LOG 0xc2 /* Report Logical LUNs */
+#define CISS_REPORT_PHYS 0xc3 /* Report Physical LUNs */
+#define CISS_GET_RAID_MAP 0xc8
+
+/* constants for CISS_REPORT_LOG/CISS_REPORT_PHYS commands */
+#define CISS_REPORT_LOG_EXTENDED 0x1
+#define CISS_REPORT_PHYS_EXTENDED 0x2
+
+/* BMIC commands */
+#define BMIC_IDENTIFY_CONTROLLER 0x11
+#define BMIC_IDENTIFY_PHYSICAL_DEVICE 0x15
+#define BMIC_READ 0x26
+#define BMIC_WRITE 0x27
+#define BMIC_SENSE_CONTROLLER_PARAMETERS 0x64
+#define BMIC_SENSE_SUBSYSTEM_INFORMATION 0x66
+#define BMIC_WRITE_HOST_WELLNESS 0xa5
+#define BMIC_CACHE_FLUSH 0xc2
+#define BMIC_FLASH_FIRMWARE 0xf7
+
+#define SA_CACHE_FLUSH 0x01
+
+#define MASKED_DEVICE(lunid) ((lunid)[3] & 0xc0)
+#define CISS_GET_BUS(lunid) ((lunid)[7] & 0x3f)
+#define CISS_GET_LEVEL_2_TARGET(lunid) ((lunid)[6])
+#define CISS_GET_DRIVE_NUMBER(lunid) \
+ (((CISS_GET_BUS((lunid)) - 1) << 8) + \
+ CISS_GET_LEVEL_2_TARGET((lunid)))
+
+#define NO_TIMEOUT ((unsigned long) -1)
+
+#pragma pack(1)
+
+struct bmic_identify_controller {
+ u8 configured_logical_drive_count;
+ __le32 configuration_signature;
+ u8 firmware_version[4];
+ u8 reserved[145];
+ __le16 extended_logical_unit_count;
+ u8 reserved1[34];
+ __le16 firmware_build_number;
+ u8 reserved2[100];
+ u8 controller_mode;
+ u8 reserved3[32];
+};
+
+struct bmic_identify_physical_device {
+ u8 scsi_bus; /* SCSI Bus number on controller */
+ u8 scsi_id; /* SCSI ID on this bus */
+ __le16 block_size; /* sector size in bytes */
+ __le32 total_blocks; /* number for sectors on drive */
+ __le32 reserved_blocks; /* controller reserved (RIS) */
+ u8 model[40]; /* Physical Drive Model */
+ u8 serial_number[40]; /* Drive Serial Number */
+ u8 firmware_revision[8]; /* drive firmware revision */
+ u8 scsi_inquiry_bits; /* inquiry byte 7 bits */
+ u8 compaq_drive_stamp; /* 0 means drive not stamped */
+ u8 last_failure_reason;
+ u8 flags;
+ u8 more_flags;
+ u8 scsi_lun; /* SCSI LUN for phys drive */
+ u8 yet_more_flags;
+ u8 even_more_flags;
+ __le32 spi_speed_rules;
+ u8 phys_connector[2]; /* connector number on controller */
+ u8 phys_box_on_bus; /* phys enclosure this drive resides */
+ u8 phys_bay_in_box; /* phys drv bay this drive resides */
+ __le32 rpm; /* drive rotational speed in RPM */
+ u8 device_type; /* type of drive */
+ u8 sata_version; /* only valid when device_type = */
+ /* BMIC_DEVICE_TYPE_SATA */
+ __le64 big_total_block_count;
+ __le64 ris_starting_lba;
+ __le32 ris_size;
+ u8 wwid[20];
+ u8 controller_phy_map[32];
+ __le16 phy_count;
+ u8 phy_connected_dev_type[256];
+ u8 phy_to_drive_bay_num[256];
+ __le16 phy_to_attached_dev_index[256];
+ u8 box_index;
+ u8 reserved;
+ __le16 extra_physical_drive_flags;
+ u8 negotiated_link_rate[256];
+ u8 phy_to_phy_map[256];
+ u8 redundant_path_present_map;
+ u8 redundant_path_failure_map;
+ u8 active_path_number;
+ __le16 alternate_paths_phys_connector[8];
+ u8 alternate_paths_phys_box_on_port[8];
+ u8 multi_lun_device_lun_count;
+ u8 minimum_good_fw_revision[8];
+ u8 unique_inquiry_bytes[20];
+ u8 current_temperature_degreesC;
+ u8 temperature_threshold_degreesC;
+ u8 max_temperature_degreesC;
+ u8 logical_blocks_per_phys_block_exp;
+ __le16 current_queue_depth_limit;
+ u8 switch_name[10];
+ __le16 switch_port;
+ u8 alternate_paths_switch_name[40];
+ u8 alternate_paths_switch_port[8];
+ __le16 power_on_hours;
+ __le16 percent_endurance_used;
+ u8 drive_authentication;
+ u8 smart_carrier_authentication;
+ u8 smart_carrier_app_fw_version;
+ u8 smart_carrier_bootloader_fw_version;
+ u8 encryption_key_name[64];
+ __le32 misc_drive_flags;
+ __le16 dek_index;
+ u8 padding[112];
+};
+
+#pragma pack()
+
+int pqi_add_sas_host(struct pqi_ctrl_info *ctrl_info);
+void pqi_delete_sas_host(struct pqi_ctrl_info *ctrl_info);
+int pqi_add_sas_device(struct pqi_sas_node *pqi_sas_node,
+ struct pqi_scsi_dev_t *device);
+void pqi_remove_sas_device(struct pqi_scsi_dev_t *device);
+struct pqi_scsi_dev_t *pqi_find_device_by_sas_rphy(
+ struct pqi_ctrl_info *ctrl_info, struct sas_rphy *rphy);
+
+extern struct sas_function_template pqi_sas_transport_functions;
+
+#if !defined(readq)
+#define readq readq
+static inline u64 readq(const volatile void __iomem *addr)
+{
+ u32 lower32;
+ u32 upper32;
+
+ lower32 = readl(addr);
+ upper32 = readl(addr + 4);
+
+ return ((u64)upper32 << 32) | lower32;
+}
+#endif
+
+#if !defined(writeq)
+#define writeq writeq
+static inline void writeq(u64 value, volatile void __iomem *addr)
+{
+ u32 lower32;
+ u32 upper32;
+
+ lower32 = lower_32_bits(value);
+ upper32 = upper_32_bits(value);
+
+ writel(lower32, addr);
+ writel(upper32, addr + 4);
+}
+#endif
+
+#endif /* _SMARTPQI_H */
diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
new file mode 100644
index 0000000..f1868b9
--- /dev/null
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -0,0 +1,6824 @@
+/*
+ * driver for Microsemi PQI-based storage controllers
+ * Copyright (c) 2016 Microsemi Corporation
+ * Copyright (c) 2016 PMC-Sierra, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more details.
+ *
+ * Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/rtc.h>
+#include <linux/bcd.h>
+#include <linux/cciss_ioctl.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_transport_sas.h>
+#include <asm/unaligned.h>
+#include "smartpqi.h"
+#include "smartpqi_sis.h"
+
+#if !defined(BUILD_TIMESTAMP)
+#define BUILD_TIMESTAMP
+#endif
+
+#define DRIVER_VERSION "0.9.7-100"
+#define DRIVER_MAJOR 0
+#define DRIVER_MINOR 9
+#define DRIVER_RELEASE 7
+#define DRIVER_REVISION 100
+
+#define DRIVER_NAME "Microsemi PQI Driver (v" DRIVER_VERSION ")"
+#define DRIVER_NAME_SHORT "smartpqi"
+
+MODULE_AUTHOR("Microsemi");
+MODULE_DESCRIPTION("Driver for Microsemi Smart Family Controller version "
+ DRIVER_VERSION);
+MODULE_SUPPORTED_DEVICE("Microsemi Smart Family Controllers");
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");
+
+#define PQI_ENABLE_MULTI_QUEUE_SUPPORT 0
+
+static char *hpe_branded_controller = "HPE Smart Array Controller";
+static char *microsemi_branded_controller = "Microsemi Smart Family Controller";
+
+/* Define the PCI IDs for the controllers that we support. */
+static const struct pci_device_id pqi_pci_id_table[] = {
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_ADAPTEC2,
+ .subdevice = 0x0110,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_HP,
+ .subdevice = 0x0600,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_HP,
+ .subdevice = 0x0601,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_HP,
+ .subdevice = 0x0602,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_HP,
+ .subdevice = 0x0603,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_HP,
+ .subdevice = 0x0650,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_HP,
+ .subdevice = 0x0651,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_HP,
+ .subdevice = 0x0652,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_HP,
+ .subdevice = 0x0653,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_HP,
+ .subdevice = 0x0654,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_HP,
+ .subdevice = 0x0655,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_HP,
+ .subdevice = 0x0700,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_HP,
+ .subdevice = 0x0701,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_ADAPTEC2,
+ .subdevice = 0x0800,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_ADAPTEC2,
+ .subdevice = 0x0801,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_ADAPTEC2,
+ .subdevice = 0x0802,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_ADAPTEC2,
+ .subdevice = 0x0803,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_ADAPTEC2,
+ .subdevice = 0x0804,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_ADAPTEC2,
+ .subdevice = 0x0805,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_ADAPTEC2,
+ .subdevice = 0x0900,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_ADAPTEC2,
+ .subdevice = 0x0901,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_ADAPTEC2,
+ .subdevice = 0x0902,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_ADAPTEC2,
+ .subdevice = 0x0903,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_ADAPTEC2,
+ .subdevice = 0x0904,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_ADAPTEC2,
+ .subdevice = 0x0905,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_ADAPTEC2,
+ .subdevice = 0x0906,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_HP,
+ .subdevice = 0x1001,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_HP,
+ .subdevice = 0x1100,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_HP,
+ .subdevice = 0x1101,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_HP,
+ .subdevice = 0x1102,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_VENDOR_ID_HP,
+ .subdevice = 0x1150,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ {
+ .vendor = PCI_VENDOR_ID_ADAPTEC2,
+ .device = 0x028f,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .class = 0,
+ .class_mask = 0,
+ .driver_data = 0
+ },
+ { 0 }
+};
+
+MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
+
+static struct {
+ atomic_t num_requests[2];
+ atomic_t num_raid_bypasses;
+ atomic_t num_outstanding_requests[2];
+ atomic_t num_passthru_ioctls;
+ atomic_t num_heartbeat_events;
+ atomic_t num_all_other_events;
+ atomic_t num_scans;
+ atomic_t num_interrupts;
+ atomic_t num_spurious_interrupts;
+ atomic_t num_alloc_io_request_collisions;
+ atomic_t num_spans[2];
+ atomic_t num_interrupts_wrong_cpu;
+} pqi_statistics = {
+ .num_requests[0] = ATOMIC_INIT(0),
+ .num_requests[1] = ATOMIC_INIT(0),
+ .num_raid_bypasses = ATOMIC_INIT(0),
+ .num_outstanding_requests[0] = ATOMIC_INIT(0),
+ .num_outstanding_requests[1] = ATOMIC_INIT(0),
+ .num_passthru_ioctls = ATOMIC_INIT(0),
+ .num_heartbeat_events = ATOMIC_INIT(0),
+ .num_all_other_events = ATOMIC_INIT(0),
+ .num_scans = ATOMIC_INIT(0),
+ .num_interrupts = ATOMIC_INIT(0),
+ .num_spurious_interrupts = ATOMIC_INIT(0),
+ .num_alloc_io_request_collisions = ATOMIC_INIT(0),
+ .num_spans[0] = ATOMIC_INIT(0),
+ .num_spans[1] = ATOMIC_INIT(0),
+ .num_interrupts_wrong_cpu = ATOMIC_INIT(0),
+};
+
+static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info);
+static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
+static void pqi_scan_start(struct Scsi_Host *shost);
+static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_queue_group *queue_group, enum pqi_io_path path,
+ struct pqi_io_request *io_request);
+static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_iu_header *request, unsigned int flags,
+ struct pqi_raid_error_info *error_info, unsigned long timeout_msecs);
+static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
+ struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
+ unsigned int cdb_length, struct pqi_queue_group *queue_group,
+ struct pqi_encryption_info *encryption_info);
+
+/* for flags argument to pqi_submit_raid_request_synchronous() */
+#define PQI_SYNC_FLAGS_INTERRUPTABLE 0x1
+
+static struct scsi_transport_template *pqi_sas_transport_template;
+
+static atomic_t pqi_controller_count = ATOMIC_INIT(0);
+
+static int pqi_disable_device_id_wildcards;
+module_param_named(disable_device_id_wildcards,
+ pqi_disable_device_id_wildcards, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(disable_device_id_wildcards,
+ "Disable device ID wildcards.");
+
+static char *raid_levels[] = {
+ "RAID-0",
+ "RAID-4",
+ "RAID-1(1+0)",
+ "RAID-5",
+ "RAID-5+1",
+ "RAID-ADG",
+ "RAID-1(ADM)",
+};
+
+static char *pqi_raid_level_to_string(u8 raid_level)
+{
+ if (raid_level < ARRAY_SIZE(raid_levels))
+ return raid_levels[raid_level];
+
+ return "";
+}
+
+#define SA_RAID_0 0
+#define SA_RAID_4 1
+#define SA_RAID_1 2 /* also used for RAID 10 */
+#define SA_RAID_5 3 /* also used for RAID 50 */
+#define SA_RAID_51 4
+#define SA_RAID_6 5 /* also used for RAID 60 */
+#define SA_RAID_ADM 6 /* also used for RAID 1+0 ADM */
+#define SA_RAID_MAX SA_RAID_ADM
+#define SA_RAID_UNKNOWN 0xff
+
+static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
+{
+ scmd->scsi_done(scmd);
+}
+
+static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
+{
+ return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
+}
+
+static inline struct pqi_ctrl_info *shost_to_hba(struct Scsi_Host *shost)
+{
+ void *hostdata = shost_priv(shost);
+
+ return *((struct pqi_ctrl_info **)hostdata);
+}
+
+static inline bool pqi_is_logical_device(struct pqi_scsi_dev_t *device)
+{
+ return !device->is_physical_device;
+}
+
+static inline bool pqi_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
+{
+ return !ctrl_info->controller_online;
+}
+
+static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
+{
+ if (ctrl_info->controller_online)
+ if (!sis_is_firmware_running(ctrl_info))
+ pqi_take_ctrl_offline(ctrl_info);
+}
+
+static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
+{
+ return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
+}
+
+#define PQI_RESCAN_WORK_INTERVAL (10 * HZ)
+
+static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
+{
+ schedule_delayed_work(&ctrl_info->rescan_work,
+ PQI_RESCAN_WORK_INTERVAL);
+}
+
+static ssize_t pqi_host_store_rescan(struct device *dev,
+ struct device_attribute *attr, const char *buffer, size_t count)
+{
+ struct Scsi_Host *shost = class_to_shost(dev);
+
+ pqi_scan_start(shost);
+
+ return count;
+}
+
+static ssize_t pqi_statistics_show(struct device *dev,
+ struct device_attribute *attr, char *buffer)
+{
+ ssize_t count = 0;
+ unsigned int num_raid_requests;
+ unsigned int num_aio_requests;
+ unsigned int num_outstanding_raid_requests = 0;
+ unsigned int num_outstanding_aio_requests = 0;
+ struct pqi_ctrl_info *ctrl_info;
+ struct Scsi_Host *shost;
+
+ shost = class_to_shost(dev);
+ ctrl_info = shost_to_hba(shost);
+
+ num_raid_requests =
+ atomic_read(&pqi_statistics.num_requests[RAID_PATH]);
+ num_aio_requests = atomic_read(&pqi_statistics.num_requests[AIO_PATH]);
+
+ num_outstanding_raid_requests =
+ atomic_read(&pqi_statistics.num_outstanding_requests[RAID_PATH]);
+ num_outstanding_aio_requests =
+ atomic_read(&pqi_statistics.num_outstanding_requests[AIO_PATH]);
+
+ if (pqi_ctrl_offline(ctrl_info))
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ "*** CONTROLLER OFFLINE ***\n");
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " total requests: %u\n",
+ num_raid_requests + num_aio_requests);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " total RAID requests: %u\n",
+ num_raid_requests);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " total AIO requests: %u\n",
+ num_aio_requests);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " RAID bypasses: %u\n",
+ atomic_read(&pqi_statistics.num_raid_bypasses));
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ "total outstanding requests: %u\n",
+ num_outstanding_raid_requests + num_outstanding_aio_requests);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " outstanding RAID requests: %u / %u\n",
+ num_outstanding_raid_requests,
+ ctrl_info->num_queue_groups *
+ (ctrl_info->num_elements_per_iq - 1));
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " outstanding AIO requests: %u / %u\n",
+ num_outstanding_aio_requests,
+ ctrl_info->num_queue_groups *
+ (ctrl_info->num_elements_per_iq - 1));
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " passthrough IOCTLs: %u\n",
+ atomic_read(&pqi_statistics.num_passthru_ioctls));
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " heartbeat events: %u\n",
+ atomic_read(&pqi_statistics.num_heartbeat_events));
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " all other events: %u\n",
+ atomic_read(&pqi_statistics.num_all_other_events));
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " scan count: %u\n",
+ atomic_read(&pqi_statistics.num_scans));
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " interrupts: %u\n",
+ atomic_read(&pqi_statistics.num_interrupts));
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " spurious interrupts: %u\n",
+ atomic_read(&pqi_statistics.num_spurious_interrupts));
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " alloc request collisions: %u\n",
+ atomic_read(&pqi_statistics.num_alloc_io_request_collisions));
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " RAID spans: %u\n",
+ atomic_read(&pqi_statistics.num_spans[RAID_PATH]));
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " AIO spans: %u\n",
+ atomic_read(&pqi_statistics.num_spans[AIO_PATH]));
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " interrupts on wrong CPU: %u\n",
+ atomic_read(&pqi_statistics.num_interrupts_wrong_cpu));
+
+ return count;
+}
+
+static ssize_t pqi_devices_show(struct device *dev,
+ struct device_attribute *attr, char *buffer)
+{
+ ssize_t count = 0;
+ unsigned long flags;
+ struct Scsi_Host *shost;
+ struct pqi_ctrl_info *ctrl_info;
+ struct pqi_scsi_dev_t *device;
+
+ shost = class_to_shost(dev);
+ ctrl_info = shost_to_hba(shost);
+
+ spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+ list_for_each_entry(device, &ctrl_info->scsi_device_list,
+ scsi_device_list_entry) {
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ "%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
+
+ if (device->target_lun_valid) {
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ "%d:%d",
+ device->target,
+ device->lun);
+ } else {
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ "-:-");
+ }
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " Exp%c %016llx %s %.8s %.16s ",
+ device->expose_device ? '+' : '-',
+ get_unaligned_be64(device->scsi3addr),
+ scsi_device_type(device->devtype),
+ device->vendor,
+ device->model);
+
+ if (pqi_is_logical_device(device)) {
+ if (device->devtype == TYPE_DISK)
+ count += snprintf(buffer + count,
+ PAGE_SIZE - count,
+ "qd=%-6d SSDSmartPathCap%c En%c %-12s",
+ device->queue_depth,
+ device->offload_configured ? '+' : '-',
+ (device->offload_enabled ||
+ device->offload_enabled_pending)
+ ? '+' : '-',
+ pqi_raid_level_to_string(
+ device->raid_level));
+ } else {
+ if (device->devtype == TYPE_DISK ||
+ device->devtype == TYPE_ZBC)
+ count += snprintf(buffer + count,
+ PAGE_SIZE - count,
+ "qd=%-6d AIO%c",
+ device->queue_depth,
+ device->aio_enabled ? '+' : '-');
+ }
+
+ count += snprintf(buffer + count, PAGE_SIZE - count, "\n");
+ }
+
+ spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+ return count;
+}
+
+static ssize_t pqi_version_show(struct device *dev,
+ struct device_attribute *attr, char *buffer)
+{
+ ssize_t count = 0;
+ struct Scsi_Host *shost;
+ struct pqi_ctrl_info *ctrl_info;
+
+ shost = class_to_shost(dev);
+ ctrl_info = shost_to_hba(shost);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " driver: %s\n", DRIVER_VERSION BUILD_TIMESTAMP);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ "firmware: %s\n", ctrl_info->firmware_version);
+
+ return count;
+}
+
+static ssize_t pqi_sas_address_show(struct device *dev,
+ struct device_attribute *attr, char *buffer)
+{
+ struct pqi_ctrl_info *ctrl_info;
+ struct scsi_device *sdev;
+ struct pqi_scsi_dev_t *device;
+ unsigned long flags;
+ u64 sas_address;
+
+ sdev = to_scsi_device(dev);
+ ctrl_info = shost_to_hba(sdev->host);
+
+ spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+ device = sdev->hostdata;
+ if (!device || pqi_is_logical_device(device) ||
+ !device->expose_device) {
+ spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
+ flags);
+ return -ENODEV;
+ }
+ sas_address = device->sas_address;
+
+ spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+ return snprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
+}
+
+static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
+ struct device_attribute *attr, char *buffer)
+{
+ ssize_t count;
+ struct pqi_ctrl_info *ctrl_info;
+ struct scsi_device *sdev;
+ struct pqi_scsi_dev_t *device;
+ unsigned long flags;
+
+ sdev = to_scsi_device(dev);
+ ctrl_info = shost_to_hba(sdev->host);
+
+ spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+ device = sdev->hostdata;
+ if (device) {
+ buffer[0] = device->offload_enabled ? '1' : '0';
+ buffer[1] = '\n';
+ buffer[2] = '\0';
+ count = 2;
+ } else
+ count = -ENODEV;
+
+ spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+ return count;
+}
+
+static ssize_t pqi_info_show(struct device *dev,
+ struct device_attribute *attr, char *buffer)
+{
+ ssize_t count = 0;
+ struct Scsi_Host *shost;
+ struct pqi_ctrl_info *ctrl_info;
+
+ shost = class_to_shost(dev);
+ ctrl_info = shost_to_hba(shost);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " queue groups: %u\n",
+ ctrl_info->num_active_queue_groups);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " max. inbound queues: %u\n",
+ ctrl_info->max_inbound_queues);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " inbound AIO queues: %u\n",
+ ctrl_info->num_active_queue_groups);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " inbound RAID queues: %u\n",
+ ctrl_info->num_active_queue_groups);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " max. elements per inbound queue: %u\n",
+ ctrl_info->max_elements_per_iq);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " usable elements per inbound queue: %u\n",
+ ctrl_info->num_elements_per_iq - 1);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " max. inbound queue element length: %u\n",
+ ctrl_info->max_iq_element_length);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " inbound queue element length: %u\n",
+ PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " max. outbound queues: %u\n",
+ ctrl_info->max_outbound_queues);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " outbound queues: %u\n",
+ ctrl_info->num_active_queue_groups + 1);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " max. elements per outbound queue: %u\n",
+ ctrl_info->max_elements_per_oq);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " usable elements per outbound queue: %u\n",
+ ctrl_info->num_elements_per_oq - 1);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " max. outbound queue element length: %u\n",
+ ctrl_info->max_oq_element_length);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " outbound queue element length: %u\n",
+ PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " max. MSI-X vectors: %d\n",
+ PQI_MAX_MSIX_VECTORS);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " MSI-X vectors in use: %u\n",
+ ctrl_info->num_msix_vectors_initialized);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " max. outstanding requests: %u\n",
+ ctrl_info->max_outstanding_requests);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " f/w reported max. transfer size: %u\n",
+ ctrl_info->max_transfer_size);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " driver max. transfer size: %u\n",
+ ctrl_info->max_sectors * 512);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ "f/w reported max. inbound IU length: %u\n",
+ ctrl_info->max_inbound_iu_length_per_firmware);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " max. inbound IU length in use: %u\n",
+ ctrl_info->max_inbound_iu_length);
+
+ return count;
+}
+
+static int pqi_map_single(struct pci_dev *pci_dev,
+ struct pqi_sg_descriptor *sg_descriptor, void *buffer,
+ size_t buffer_length, int data_direction)
+{
+ dma_addr_t bus_address;
+
+ if (!buffer || buffer_length == 0 || data_direction == PCI_DMA_NONE)
+ return 0;
+
+ bus_address = pci_map_single(pci_dev, buffer, buffer_length,
+ data_direction);
+ if (pci_dma_mapping_error(pci_dev, bus_address))
+ return -ENOMEM;
+
+ put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
+ put_unaligned_le32(buffer_length, &sg_descriptor->length);
+ put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
+
+ return 0;
+}
+
+static void pqi_pci_unmap(struct pci_dev *pci_dev,
+ struct pqi_sg_descriptor *descriptors, int num_descriptors,
+ int data_direction)
+{
+ int i;
+
+ if (data_direction == PCI_DMA_NONE)
+ return;
+
+ for (i = 0; i < num_descriptors; i++)
+ pci_unmap_single(pci_dev,
+ (dma_addr_t)get_unaligned_le64(&descriptors[i].address),
+ get_unaligned_le32(&descriptors[i].length),
+ data_direction);
+}
+
+static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_raid_path_request *request, u8 cmd,
+ u8 *scsi3addr, void *buffer, size_t buffer_length,
+ u16 vpd_page, int *pci_direction)
+{
+ u8 *cdb;
+ int pci_dir;
+
+ memset(request, 0, sizeof(*request));
+
+ request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
+ put_unaligned_le16(offsetof(struct pqi_raid_path_request,
+ sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
+ &request->header.iu_length);
+ put_unaligned_le32(buffer_length, &request->buffer_length);
+ memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
+ request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
+ request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
+
+ cdb = request->cdb;
+
+ switch (cmd) {
+ case INQUIRY:
+ request->data_direction = SOP_READ_FLAG;
+ cdb[0] = INQUIRY;
+ if (vpd_page & VPD_PAGE) {
+ cdb[1] = 0x1;
+ cdb[2] = (u8)vpd_page;
+ }
+ cdb[4] = (u8)buffer_length;
+ break;
+ case CISS_REPORT_LOG:
+ case CISS_REPORT_PHYS:
+ request->data_direction = SOP_READ_FLAG;
+ cdb[0] = cmd;
+ if (cmd == CISS_REPORT_PHYS)
+ cdb[1] = CISS_REPORT_PHYS_EXTENDED;
+ else
+ cdb[1] = CISS_REPORT_LOG_EXTENDED;
+ put_unaligned_be32(buffer_length, &cdb[6]);
+ break;
+ case CISS_GET_RAID_MAP:
+ request->data_direction = SOP_READ_FLAG;
+ cdb[0] = CISS_READ;
+ cdb[1] = CISS_GET_RAID_MAP;
+ put_unaligned_be32(buffer_length, &cdb[6]);
+ break;
+ case SA_CACHE_FLUSH:
+ request->data_direction = SOP_WRITE_FLAG;
+ cdb[0] = BMIC_WRITE;
+ cdb[6] = BMIC_CACHE_FLUSH;
+ put_unaligned_be16(buffer_length, &cdb[7]);
+ break;
+ case BMIC_IDENTIFY_CONTROLLER:
+ case BMIC_IDENTIFY_PHYSICAL_DEVICE:
+ request->data_direction = SOP_READ_FLAG;
+ cdb[0] = BMIC_READ;
+ cdb[6] = cmd;
+ put_unaligned_be16(buffer_length, &cdb[7]);
+ break;
+ case BMIC_WRITE_HOST_WELLNESS:
+ request->data_direction = SOP_WRITE_FLAG;
+ cdb[0] = BMIC_WRITE;
+ cdb[6] = cmd;
+ put_unaligned_be16(buffer_length, &cdb[7]);
+ break;
+ default:
+ dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n",
+ cmd);
+ WARN_ON(cmd);
+ break;
+ }
+
+ switch (request->data_direction) {
+ case SOP_READ_FLAG:
+ pci_dir = PCI_DMA_FROMDEVICE;
+ break;
+ case SOP_WRITE_FLAG:
+ pci_dir = PCI_DMA_TODEVICE;
+ break;
+ case SOP_NO_DIRECTION_FLAG:
+ pci_dir = PCI_DMA_NONE;
+ break;
+ default:
+ pci_dir = PCI_DMA_BIDIRECTIONAL;
+ break;
+ }
+
+ *pci_direction = pci_dir;
+
+ return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
+ buffer, buffer_length, pci_dir);
+}
+
+static struct pqi_io_request *pqi_alloc_io_request(
+ struct pqi_ctrl_info *ctrl_info)
+{
+ struct pqi_io_request *io_request;
+ u16 i = ctrl_info->next_io_request_slot; /* benignly racy */
+
+ while (1) {
+ io_request = &ctrl_info->io_request_pool[i];
+ if (atomic_inc_return(&io_request->refcount) == 1)
+ break;
+ atomic_inc(&pqi_statistics.num_alloc_io_request_collisions);
+ atomic_dec(&io_request->refcount);
+ i = (i + 1) % ctrl_info->max_io_slots;
+ }
+
+ /* benignly racy */
+ ctrl_info->next_io_request_slot = (i + 1) % ctrl_info->max_io_slots;
+
+ io_request->scmd = NULL;
+ io_request->status = 0;
+ io_request->error_info = NULL;
+
+ return io_request;
+}
+
+static void pqi_free_io_request(struct pqi_io_request *io_request)
+{
+ atomic_dec(&io_request->refcount);
+}
+
+static int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
+ struct bmic_identify_controller *buffer)
+{
+ int rc;
+ int pci_direction;
+ struct pqi_raid_path_request request;
+
+ rc = pqi_build_raid_path_request(ctrl_info, &request,
+ BMIC_IDENTIFY_CONTROLLER, RAID_CTLR_LUNID, buffer,
+ sizeof(*buffer), 0, &pci_direction);
+ if (rc)
+ return rc;
+
+ rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
+ NULL, NO_TIMEOUT);
+
+ pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
+ pci_direction);
+
+ return rc;
+}
+
+static int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
+ u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
+{
+ int rc;
+ int pci_direction;
+ struct pqi_raid_path_request request;
+
+ rc = pqi_build_raid_path_request(ctrl_info, &request,
+ INQUIRY, scsi3addr, buffer, buffer_length, vpd_page,
+ &pci_direction);
+ if (rc)
+ return rc;
+
+ rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
+ NULL, NO_TIMEOUT);
+
+ pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
+ pci_direction);
+
+ return rc;
+}
+
+static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device,
+ struct bmic_identify_physical_device *buffer,
+ size_t buffer_length)
+{
+ int rc;
+ int pci_direction;
+ u16 bmic_device_index;
+ struct pqi_raid_path_request request;
+
+ rc = pqi_build_raid_path_request(ctrl_info, &request,
+ BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
+ buffer_length, 0, &pci_direction);
+ if (rc)
+ return rc;
+
+ bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
+ request.cdb[2] = (u8)bmic_device_index;
+ request.cdb[9] = (u8)(bmic_device_index >> 8);
+
+ rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
+ 0, NULL, NO_TIMEOUT);
+
+ pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
+ pci_direction);
+
+ return rc;
+}
+
+#define SA_CACHE_FLUSH_BUFFER_LENGTH 4
+
+static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ struct pqi_raid_path_request request;
+ int pci_direction;
+ u8 *buffer;
+
+ /*
+ * Don't bother trying to flush the cache if the controller is
+ * locked up.
+ */
+ if (pqi_ctrl_offline(ctrl_info))
+ return -ENXIO;
+
+ buffer = kzalloc(SA_CACHE_FLUSH_BUFFER_LENGTH, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ rc = pqi_build_raid_path_request(ctrl_info, &request,
+ SA_CACHE_FLUSH, RAID_CTLR_LUNID, buffer,
+ SA_CACHE_FLUSH_BUFFER_LENGTH, 0, &pci_direction);
+ if (rc)
+ goto out;
+
+ rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
+ 0, NULL, NO_TIMEOUT);
+
+ pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
+ pci_direction);
+
+out:
+ kfree(buffer);
+
+ return rc;
+}
+
+static int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
+ void *buffer, size_t buffer_length)
+{
+ int rc;
+ struct pqi_raid_path_request request;
+ int pci_direction;
+
+ rc = pqi_build_raid_path_request(ctrl_info, &request,
+ BMIC_WRITE_HOST_WELLNESS, RAID_CTLR_LUNID, buffer,
+ buffer_length, 0, &pci_direction);
+ if (rc)
+ return rc;
+
+ rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
+ 0, NULL, NO_TIMEOUT);
+
+ pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
+ pci_direction);
+
+ return rc;
+}
+
+#pragma pack(1)
+
+struct bmic_host_wellness_driver_version {
+ u8 start_tag[4];
+ u8 driver_version_tag[2];
+ __le16 driver_version_length;
+ char driver_version[32];
+ u8 end_tag[2];
+};
+
+#pragma pack()
+
+static int pqi_write_driver_version_to_host_wellness(
+ struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ struct bmic_host_wellness_driver_version *buffer;
+ size_t buffer_length;
+
+ buffer_length = sizeof(*buffer);
+
+ buffer = kmalloc(buffer_length, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ buffer->start_tag[0] = '<';
+ buffer->start_tag[1] = 'H';
+ buffer->start_tag[2] = 'W';
+ buffer->start_tag[3] = '>';
+ buffer->driver_version_tag[0] = 'D';
+ buffer->driver_version_tag[1] = 'V';
+ put_unaligned_le16(sizeof(buffer->driver_version),
+ &buffer->driver_version_length);
+ strncpy(buffer->driver_version, DRIVER_VERSION,
+ sizeof(buffer->driver_version) - 1);
+ buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
+ buffer->end_tag[0] = 'Z';
+ buffer->end_tag[1] = 'Z';
+
+ rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
+
+ kfree(buffer);
+
+ return rc;
+}
+
+#pragma pack(1)
+
+struct bmic_host_wellness_time {
+ u8 start_tag[4];
+ u8 time_tag[2];
+ __le16 time_length;
+ u8 time[8];
+ u8 dont_write_tag[2];
+ u8 end_tag[2];
+};
+
+#pragma pack()
+
+#if !defined(rtc_time64_to_tm)
+void rtc_time64_to_tm(time64_t time, struct rtc_time *tm)
+{
+ rtc_time_to_tm(time, tm);
+}
+#endif
+
+static int pqi_write_current_time_to_host_wellness(
+ struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ struct bmic_host_wellness_time *buffer;
+ size_t buffer_length;
+ unsigned long local_time;
+ unsigned int year;
+ struct timeval time;
+ struct rtc_time tm;
+
+ buffer_length = sizeof(*buffer);
+
+ buffer = kmalloc(buffer_length, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ buffer->start_tag[0] = '<';
+ buffer->start_tag[1] = 'H';
+ buffer->start_tag[2] = 'W';
+ buffer->start_tag[3] = '>';
+ buffer->time_tag[0] = 'T';
+ buffer->time_tag[1] = 'D';
+ put_unaligned_le16(sizeof(buffer->time),
+ &buffer->time_length);
+
+ do_gettimeofday(&time);
+ local_time = time.tv_sec - (sys_tz.tz_minuteswest * 60);
+ rtc_time_to_tm(local_time, &tm);
+ year = tm.tm_year + 1900;
+
+ buffer->time[0] = bin2bcd(tm.tm_hour);
+ buffer->time[1] = bin2bcd(tm.tm_min);
+ buffer->time[2] = bin2bcd(tm.tm_sec);
+ buffer->time[3] = 0;
+ buffer->time[4] = bin2bcd(tm.tm_mon + 1);
+ buffer->time[5] = bin2bcd(tm.tm_mday);
+ buffer->time[6] = bin2bcd(year / 100);
+ buffer->time[7] = bin2bcd(year % 100);
+
+ buffer->dont_write_tag[0] = 'D';
+ buffer->dont_write_tag[1] = 'W';
+ buffer->end_tag[0] = 'Z';
+ buffer->end_tag[1] = 'Z';
+
+ rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
+
+ kfree(buffer);
+
+ return rc;
+}
+
+#define PQI_UPDATE_TIME_WORK_INTERVAL (24UL * 60 * 60 * HZ)
+
+static void pqi_update_time_worker(struct work_struct *work)
+{
+ int rc;
+ struct pqi_ctrl_info *ctrl_info;
+
+ ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
+ update_time_work);
+
+ rc = pqi_write_current_time_to_host_wellness(ctrl_info);
+ if (rc)
+ dev_warn(&ctrl_info->pci_dev->dev,
+ "error updating time on controller\n");
+
+ schedule_delayed_work(&ctrl_info->update_time_work,
+ PQI_UPDATE_TIME_WORK_INTERVAL);
+}
+
+static inline void pqi_schedule_update_time_worker(
+ struct pqi_ctrl_info *ctrl_info)
+{
+ schedule_delayed_work(&ctrl_info->update_time_work, 0);
+}
+
+static int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
+ void *buffer, size_t buffer_length)
+{
+ int rc;
+ int pci_direction;
+ struct pqi_raid_path_request request;
+
+ rc = pqi_build_raid_path_request(ctrl_info, &request,
+ cmd, RAID_CTLR_LUNID, buffer, buffer_length, 0, &pci_direction);
+ if (rc)
+ return rc;
+
+ rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
+ NULL, NO_TIMEOUT);
+
+ pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
+ pci_direction);
+
+ return rc;
+}
+
+static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
+ void **buffer)
+{
+ int rc;
+ size_t lun_list_length;
+ size_t lun_data_length;
+ size_t new_lun_list_length;
+ void *lun_data = NULL;
+ struct report_lun_header *report_lun_header;
+
+ report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
+ if (!report_lun_header) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ rc = pqi_report_luns(ctrl_info, cmd, report_lun_header,
+ sizeof(*report_lun_header));
+ if (rc)
+ goto out;
+
+ lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
+
+again:
+ lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
+
+ lun_data = kmalloc(lun_data_length, GFP_KERNEL);
+ if (!lun_data) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ if (lun_list_length == 0) {
+ memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
+ goto out;
+ }
+
+ rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
+ if (rc)
+ goto out;
+
+ new_lun_list_length = get_unaligned_be32(
+ &((struct report_lun_header *)lun_data)->list_length);
+
+ if (new_lun_list_length > lun_list_length) {
+ lun_list_length = new_lun_list_length;
+ kfree(lun_data);
+ goto again;
+ }
+
+out:
+ kfree(report_lun_header);
+
+ if (rc) {
+ kfree(lun_data);
+ lun_data = NULL;
+ }
+
+ *buffer = lun_data;
+
+ return rc;
+}
+
+static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info,
+ void **buffer)
+{
+ return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS,
+ buffer);
+}
+
+static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info,
+ void **buffer)
+{
+ return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
+}
+
+static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
+ struct report_phys_lun_extended **physdev_list,
+ struct report_log_lun_extended **logdev_list)
+{
+ int rc;
+ size_t logdev_list_length;
+ size_t logdev_data_length;
+ struct report_log_lun_extended *internal_logdev_list;
+ struct report_log_lun_extended *logdev_data;
+ struct report_lun_header report_lun_header;
+
+ rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
+ if (rc)
+ dev_err(&ctrl_info->pci_dev->dev,
+ "report physical LUNs failed\n");
+
+ rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
+ if (rc)
+ dev_err(&ctrl_info->pci_dev->dev,
+ "report logical LUNs failed\n");
+
+ /*
+ * Tack the controller itself onto the end of the logical device list.
+ */
+
+ logdev_data = *logdev_list;
+
+ if (logdev_data) {
+ logdev_list_length =
+ get_unaligned_be32(&logdev_data->header.list_length);
+ } else {
+ memset(&report_lun_header, 0, sizeof(report_lun_header));
+ logdev_data =
+ (struct report_log_lun_extended *)&report_lun_header;
+ logdev_list_length = 0;
+ }
+
+ logdev_data_length = sizeof(struct report_lun_header) +
+ logdev_list_length;
+
+ internal_logdev_list = kmalloc(logdev_data_length +
+ sizeof(struct report_log_lun_extended), GFP_KERNEL);
+ if (!internal_logdev_list) {
+ kfree(*logdev_list);
+ *logdev_list = NULL;
+ return -ENOMEM;
+ }
+
+ memcpy(internal_logdev_list, logdev_data, logdev_data_length);
+ memset((u8 *)internal_logdev_list + logdev_data_length, 0,
+ sizeof(struct report_log_lun_extended_entry));
+ put_unaligned_be32(logdev_list_length +
+ sizeof(struct report_log_lun_extended_entry),
+ &internal_logdev_list->header.list_length);
+
+ kfree(*logdev_list);
+ *logdev_list = internal_logdev_list;
+
+ return 0;
+}
+
+static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev_t *device,
+ int bus, int target, int lun)
+{
+ device->bus = bus;
+ device->target = target;
+ device->lun = lun;
+}
+
+static void pqi_assign_bus_target_lun(struct pqi_scsi_dev_t *device)
+{
+ u8 *scsi3addr;
+ u32 lunid;
+
+ scsi3addr = device->scsi3addr;
+ lunid = get_unaligned_le32(scsi3addr);
+
+ if (pqi_is_hba_lunid(scsi3addr)) {
+ /* The specified device is the controller. */
+ pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
+ device->target_lun_valid = true;
+ return;
+ }
+
+ if (pqi_is_logical_device(device)) {
+ pqi_set_bus_target_lun(device, PQI_RAID_VOLUME_BUS, 0,
+ lunid & 0x3fff);
+ device->target_lun_valid = true;
+ return;
+ }
+
+ /*
+ * Defer target and LUN assignment for non-controller physical devices
+ * because the SAS transport layer will make these assignments later.
+ */
+ pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
+}
+
+static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device)
+{
+ int rc;
+ u8 raid_level;
+ u8 *buffer;
+
+ raid_level = SA_RAID_UNKNOWN;
+
+ buffer = kmalloc(64, GFP_KERNEL);
+ if (buffer) {
+ rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
+ VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
+ if (rc == 0) {
+ raid_level = buffer[8];
+ if (raid_level > SA_RAID_MAX)
+ raid_level = SA_RAID_UNKNOWN;
+ }
+ kfree(buffer);
+ }
+
+ device->raid_level = raid_level;
+}
+
+static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device, struct raid_map *raid_map)
+{
+ char *err_msg;
+ u32 raid_map_size;
+ u32 r5or6_blocks_per_row;
+ unsigned int num_phys_disks;
+ unsigned int num_raid_map_entries;
+
+ raid_map_size = get_unaligned_le32(&raid_map->structure_size);
+
+ if (raid_map_size < offsetof(struct raid_map, disk_data)) {
+ err_msg = "RAID map too small";
+ goto bad_raid_map;
+ }
+
+ if (raid_map_size > sizeof(*raid_map)) {
+ err_msg = "RAID map too large";
+ goto bad_raid_map;
+ }
+
+ num_phys_disks = get_unaligned_le16(&raid_map->layout_map_count) *
+ (get_unaligned_le16(&raid_map->data_disks_per_row) +
+ get_unaligned_le16(&raid_map->metadata_disks_per_row));
+ num_raid_map_entries = num_phys_disks *
+ get_unaligned_le16(&raid_map->row_cnt);
+
+ if (num_raid_map_entries > RAID_MAP_MAX_ENTRIES) {
+ err_msg = "invalid number of map entries in RAID map";
+ goto bad_raid_map;
+ }
+
+ if (device->raid_level == SA_RAID_1) {
+ if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
+ err_msg = "invalid RAID-1 map";
+ goto bad_raid_map;
+ }
+ } else if (device->raid_level == SA_RAID_ADM) {
+ if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
+ err_msg = "invalid RAID-1(ADM) map";
+ goto bad_raid_map;
+ }
+ } else if ((device->raid_level == SA_RAID_5 ||
+ device->raid_level == SA_RAID_6) &&
+ get_unaligned_le16(&raid_map->layout_map_count) > 1) {
+ /* RAID 50/60 */
+ r5or6_blocks_per_row =
+ get_unaligned_le16(&raid_map->strip_size) *
+ get_unaligned_le16(&raid_map->data_disks_per_row);
+ if (r5or6_blocks_per_row == 0) {
+ err_msg = "invalid RAID-5 or RAID-6 map";
+ goto bad_raid_map;
+ }
+ }
+
+ return 0;
+
+bad_raid_map:
+ dev_warn(&ctrl_info->pci_dev->dev, "%s\n", err_msg);
+
+ return -EINVAL;
+}
+
+static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device)
+{
+ int rc;
+ int pci_direction;
+ struct pqi_raid_path_request request;
+ struct raid_map *raid_map;
+
+ raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
+ if (!raid_map)
+ return -ENOMEM;
+
+ rc = pqi_build_raid_path_request(ctrl_info, &request,
+ CISS_GET_RAID_MAP, device->scsi3addr, raid_map,
+ sizeof(*raid_map), 0, &pci_direction);
+ if (rc)
+ goto error;
+
+ rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
+ NULL, NO_TIMEOUT);
+
+ pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
+ pci_direction);
+
+ if (rc)
+ goto error;
+
+ rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
+ if (rc)
+ goto error;
+
+ device->raid_map = raid_map;
+
+ return 0;
+
+error:
+ kfree(raid_map);
+
+ return rc;
+}
+
+static void pqi_get_offload_status(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device)
+{
+ int rc;
+ u8 *buffer;
+ u8 offload_status;
+
+ buffer = kmalloc(64, GFP_KERNEL);
+ if (!buffer)
+ return;
+
+ rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
+ VPD_PAGE | CISS_VPD_LV_OFFLOAD_STATUS, buffer, 64);
+ if (rc)
+ goto out;
+
+#define OFFLOAD_STATUS_BYTE 4
+#define OFFLOAD_CONFIGURED_BIT 0x1
+#define OFFLOAD_ENABLED_BIT 0x2
+
+ offload_status = buffer[OFFLOAD_STATUS_BYTE];
+ device->offload_configured =
+ !!(offload_status & OFFLOAD_CONFIGURED_BIT);
+ if (device->offload_configured) {
+ device->offload_enabled_pending =
+ !!(offload_status & OFFLOAD_ENABLED_BIT);
+ if (pqi_get_raid_map(ctrl_info, device))
+ device->offload_enabled_pending = false;
+ }
+
+out:
+ kfree(buffer);
+}
+
+/*
+ * Use vendor-specific VPD to determine online/offline status of a volume.
+ */
+
+static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device)
+{
+ int rc;
+ size_t page_length;
+ u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
+ bool volume_offline = true;
+ u32 volume_flags;
+ struct ciss_vpd_logical_volume_status *vpd;
+
+ vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
+ if (!vpd)
+ goto no_buffer;
+
+ rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
+ VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
+ if (rc)
+ goto out;
+
+ page_length = offsetof(struct ciss_vpd_logical_volume_status,
+ volume_status) + vpd->page_length;
+ if (page_length < sizeof(*vpd))
+ goto out;
+
+ volume_status = vpd->volume_status;
+ volume_flags = get_unaligned_be32(&vpd->flags);
+ volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
+
+out:
+ kfree(vpd);
+no_buffer:
+ device->volume_status = volume_status;
+ device->volume_offline = volume_offline;
+}
+
+static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device)
+{
+ int rc;
+ u8 *buffer;
+
+ buffer = kmalloc(64, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ /* Send an inquiry to the device to see what it is. */
+ rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0, buffer, 64);
+ if (rc)
+ goto out;
+
+ scsi_sanitize_inquiry_string(&buffer[8], 8);
+ scsi_sanitize_inquiry_string(&buffer[16], 16);
+
+ device->devtype = buffer[0] & 0x1f;
+ memcpy(device->vendor, &buffer[8],
+ sizeof(device->vendor));
+ memcpy(device->model, &buffer[16],
+ sizeof(device->model));
+
+ if (pqi_is_logical_device(device) && device->devtype == TYPE_DISK) {
+ pqi_get_raid_level(ctrl_info, device);
+ pqi_get_offload_status(ctrl_info, device);
+ pqi_get_volume_status(ctrl_info, device);
+ }
+
+out:
+ kfree(buffer);
+
+ return rc;
+}
+
+static void pqi_get_physical_disk_info(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device,
+ struct bmic_identify_physical_device *id_phys)
+{
+ int rc;
+
+ memset(id_phys, 0, sizeof(*id_phys));
+
+ rc = pqi_identify_physical_device(ctrl_info, device,
+ id_phys, sizeof(*id_phys));
+ if (rc) {
+ device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
+ return;
+ }
+
+ device->queue_depth =
+ get_unaligned_le16(&id_phys->current_queue_depth_limit);
+ device->device_type = id_phys->device_type;
+ device->active_path_index = id_phys->active_path_number;
+ device->path_map = id_phys->redundant_path_present_map;
+ memcpy(&device->box,
+ &id_phys->alternate_paths_phys_box_on_port,
+ sizeof(device->box));
+ memcpy(&device->phys_connector,
+ &id_phys->alternate_paths_phys_connector,
+ sizeof(device->phys_connector));
+ device->bay = id_phys->phys_bay_in_box;
+}
+
+static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device)
+{
+ char *status;
+ static const char unknown_state_str[] =
+ "Volume is in an unknown state (%u)";
+ char unknown_state_buffer[sizeof(unknown_state_str) + 10];
+
+ switch (device->volume_status) {
+ case CISS_LV_OK:
+ status = "Volume online";
+ break;
+ case CISS_LV_FAILED:
+ status = "Volume failed";
+ break;
+ case CISS_LV_NOT_CONFIGURED:
+ status = "Volume not configured";
+ break;
+ case CISS_LV_DEGRADED:
+ status = "Volume degraded";
+ break;
+ case CISS_LV_READY_FOR_RECOVERY:
+ status = "Volume ready for recovery operation";
+ break;
+ case CISS_LV_UNDERGOING_RECOVERY:
+ status = "Volume undergoing recovery";
+ break;
+ case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
+ status = "Wrong physical drive was replaced";
+ break;
+ case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
+ status = "A physical drive not properly connected";
+ break;
+ case CISS_LV_HARDWARE_OVERHEATING:
+ status = "Hardware is overheating";
+ break;
+ case CISS_LV_HARDWARE_HAS_OVERHEATED:
+ status = "Hardware has overheated";
+ break;
+ case CISS_LV_UNDERGOING_EXPANSION:
+ status = "Volume undergoing expansion";
+ break;
+ case CISS_LV_NOT_AVAILABLE:
+ status = "Volume waiting for transforming volume";
+ break;
+ case CISS_LV_QUEUED_FOR_EXPANSION:
+ status = "Volume queued for expansion";
+ break;
+ case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
+ status = "Volume disabled due to SCSI ID conflict";
+ break;
+ case CISS_LV_EJECTED:
+ status = "Volume has been ejected";
+ break;
+ case CISS_LV_UNDERGOING_ERASE:
+ status = "Volume undergoing background erase";
+ break;
+ case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
+ status = "Volume ready for predictive spare rebuild";
+ break;
+ case CISS_LV_UNDERGOING_RPI:
+ status = "Volume undergoing rapid parity initialization";
+ break;
+ case CISS_LV_PENDING_RPI:
+ status = "Volume queued for rapid parity initialization";
+ break;
+ case CISS_LV_ENCRYPTED_NO_KEY:
+ status = "Encrypted volume inaccessible - key not present";
+ break;
+ case CISS_LV_UNDERGOING_ENCRYPTION:
+ status = "Volume undergoing encryption process";
+ break;
+ case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
+ status = "Volume undergoing encryption re-keying process";
+ break;
+ case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
+ status =
+ "Encrypted volume inaccessible - disabled on ctrl";
+ break;
+ case CISS_LV_PENDING_ENCRYPTION:
+ status = "Volume pending migration to encrypted state";
+ break;
+ case CISS_LV_PENDING_ENCRYPTION_REKEYING:
+ status = "Volume pending encryption rekeying";
+ break;
+ case CISS_LV_NOT_SUPPORTED:
+ status = "Volume not supported on this controller";
+ break;
+ case CISS_LV_STATUS_UNAVAILABLE:
+ status = "Volume status not available";
+ break;
+ default:
+ snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
+ unknown_state_str, device->volume_status);
+ status = unknown_state_buffer;
+ break;
+ }
+
+ dev_info(&ctrl_info->pci_dev->dev,
+ "scsi %d:%d:%d:%d %s\n",
+ ctrl_info->scsi_host->host_no,
+ device->bus, device->target, device->lun, status);
+}
+
+static struct pqi_scsi_dev_t *pqi_find_disk_by_aio_handle(
+ struct pqi_ctrl_info *ctrl_info, u32 aio_handle)
+{
+ struct pqi_scsi_dev_t *device;
+
+ list_for_each_entry(device, &ctrl_info->scsi_device_list,
+ scsi_device_list_entry) {
+ if (device->devtype != TYPE_DISK && device->devtype != TYPE_ZBC)
+ continue;
+ if (pqi_is_logical_device(device))
+ continue;
+ if (device->aio_handle == aio_handle)
+ return device;
+ }
+
+ return NULL;
+}
+
+static void pqi_update_logical_drive_queue_depth(
+ struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev_t *logical_drive)
+{
+ unsigned int i;
+ struct raid_map *raid_map;
+ struct raid_map_disk_data *disk_data;
+ struct pqi_scsi_dev_t *phys_disk;
+ unsigned int num_phys_disks;
+ unsigned int num_raid_map_entries;
+ unsigned int queue_depth;
+
+ logical_drive->queue_depth = PQI_LOGICAL_DRIVE_DEFAULT_MAX_QUEUE_DEPTH;
+
+ raid_map = logical_drive->raid_map;
+ if (!raid_map)
+ return;
+
+ disk_data = raid_map->disk_data;
+ num_phys_disks = get_unaligned_le16(&raid_map->layout_map_count) *
+ (get_unaligned_le16(&raid_map->data_disks_per_row) +
+ get_unaligned_le16(&raid_map->metadata_disks_per_row));
+ num_raid_map_entries = num_phys_disks *
+ get_unaligned_le16(&raid_map->row_cnt);
+
+ queue_depth = 0;
+ for (i = 0; i < num_raid_map_entries; i++) {
+ phys_disk = pqi_find_disk_by_aio_handle(ctrl_info,
+ disk_data[i].aio_handle);
+
+ if (!phys_disk) {
+ dev_warn(&ctrl_info->pci_dev->dev,
+ "failed to find physical disk for logical drive %016llx\n",
+ get_unaligned_be64(logical_drive->scsi3addr));
+ logical_drive->offload_enabled = false;
+ logical_drive->offload_enabled_pending = false;
+ kfree(raid_map);
+ logical_drive->raid_map = NULL;
+ return;
+ }
+
+ queue_depth += phys_disk->queue_depth;
+ }
+
+ logical_drive->queue_depth = queue_depth;
+}
+
+static void pqi_update_all_logical_drive_queue_depths(
+ struct pqi_ctrl_info *ctrl_info)
+{
+ struct pqi_scsi_dev_t *device;
+
+ list_for_each_entry(device, &ctrl_info->scsi_device_list,
+ scsi_device_list_entry) {
+ if (device->devtype != TYPE_DISK && device->devtype != TYPE_ZBC)
+ continue;
+ if (!pqi_is_logical_device(device))
+ continue;
+ pqi_update_logical_drive_queue_depth(ctrl_info, device);
+ }
+}
+
+static void pqi_rescan_worker(struct work_struct *work)
+{
+ struct pqi_ctrl_info *ctrl_info;
+
+ ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
+ rescan_work);
+
+ pqi_scan_scsi_devices(ctrl_info);
+}
+
+static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device)
+{
+ int rc;
+
+ if (pqi_is_logical_device(device))
+ rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
+ device->target, device->lun);
+ else
+ rc = pqi_add_sas_device(ctrl_info->sas_host, device);
+
+ return rc;
+}
+
+static void pqi_remove_device(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device)
+{
+ if (pqi_is_logical_device(device)) {
+ struct scsi_device *sdev =
+ scsi_device_lookup(ctrl_info->scsi_host, device->bus,
+ device->target, device->lun);
+ if (sdev) {
+ scsi_remove_device(sdev);
+ scsi_device_put(sdev);
+ } else {
+ /*
+ * We don't expect to get here. Future commands
+ * to this device will get a selection timeout as
+ * if the device were gone.
+ */
+ dev_warn(&ctrl_info->pci_dev->dev,
+ "didn't find scsi %d:%d:%d:%d for removal.",
+ ctrl_info->scsi_host->host_no, device->bus,
+ device->target, device->lun);
+ }
+ } else
+ pqi_remove_sas_device(device);
+}
+
+/* Assumes the SCSI device list lock is held. */
+
+static struct pqi_scsi_dev_t *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
+ int bus, int target, int lun)
+{
+ struct pqi_scsi_dev_t *device;
+
+ list_for_each_entry(device, &ctrl_info->scsi_device_list,
+ scsi_device_list_entry)
+ if (device->bus == bus && device->target == target &&
+ device->lun == lun)
+ return device;
+
+ return NULL;
+}
+
+static inline bool pqi_device_equal(struct pqi_scsi_dev_t *dev1,
+ struct pqi_scsi_dev_t *dev2)
+{
+ if (dev1->is_physical_device != dev2->is_physical_device)
+ return false;
+
+ if (dev1->is_physical_device)
+ return dev1->wwid == dev2->wwid;
+
+ return memcmp(dev1->volume_id, dev2->volume_id,
+ sizeof(dev1->volume_id)) == 0;
+}
+
+enum pqi_find_result {
+ DEVICE_NOT_FOUND,
+ DEVICE_CHANGED,
+ DEVICE_SAME,
+};
+
+static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device_to_find,
+ struct pqi_scsi_dev_t **matching_device)
+{
+ struct pqi_scsi_dev_t *device;
+
+ list_for_each_entry(device, &ctrl_info->scsi_device_list,
+ scsi_device_list_entry) {
+ if (pqi_scsi3addr_equal(device_to_find->scsi3addr,
+ device->scsi3addr)) {
+ *matching_device = device;
+ if (pqi_device_equal(device_to_find, device)) {
+ if (device_to_find->volume_offline)
+ return DEVICE_CHANGED;
+ return DEVICE_SAME;
+ }
+ return DEVICE_CHANGED;
+ }
+ }
+
+ return DEVICE_NOT_FOUND;
+}
+
+static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
+ char *action, struct pqi_scsi_dev_t *device)
+{
+ dev_info(&ctrl_info->pci_dev->dev,
+ "%s scsi %d:%d:%d:%d: %s %.8s %.16s %-12s SSDSmartPathCap%c En%c Exp%c qd=%d\n",
+ action,
+ ctrl_info->scsi_host->host_no,
+ device->bus,
+ device->target,
+ device->lun,
+ scsi_device_type(device->devtype),
+ device->vendor,
+ device->model,
+ pqi_raid_level_to_string(device->raid_level),
+ device->offload_configured ? '+' : '-',
+ device->offload_enabled_pending ? '+' : '-',
+ device->expose_device ? '+' : '-',
+ device->queue_depth);
+}
+
+/* Assumes the SCSI device list lock is held. */
+
+static void pqi_scsi_update_device(struct pqi_scsi_dev_t *existing_device,
+ struct pqi_scsi_dev_t *new_device)
+{
+ existing_device->devtype = new_device->devtype;
+ existing_device->device_type = new_device->device_type;
+ existing_device->bus = new_device->bus;
+ if (new_device->target_lun_valid) {
+ existing_device->target = new_device->target;
+ existing_device->lun = new_device->lun;
+ existing_device->target_lun_valid = true;
+ }
+
+ /* By definition, the scsi3addr and wwid fields are already the same. */
+
+ existing_device->is_physical_device = new_device->is_physical_device;
+ existing_device->expose_device = new_device->expose_device;
+ existing_device->no_uld_attach = new_device->no_uld_attach;
+ existing_device->aio_enabled = new_device->aio_enabled;
+ memcpy(existing_device->vendor, new_device->vendor,
+ sizeof(existing_device->vendor));
+ memcpy(existing_device->model, new_device->model,
+ sizeof(existing_device->model));
+ existing_device->sas_address = new_device->sas_address;
+ existing_device->raid_level = new_device->raid_level;
+ existing_device->queue_depth = new_device->queue_depth;
+ existing_device->aio_handle = new_device->aio_handle;
+ existing_device->volume_status = new_device->volume_status;
+ existing_device->active_path_index = new_device->active_path_index;
+ existing_device->path_map = new_device->path_map;
+ existing_device->bay = new_device->bay;
+ memcpy(existing_device->box, new_device->box,
+ sizeof(existing_device->box));
+ memcpy(existing_device->phys_connector, new_device->phys_connector,
+ sizeof(existing_device->phys_connector));
+ existing_device->offload_configured = new_device->offload_configured;
+ existing_device->offload_enabled = false;
+ existing_device->offload_enabled_pending =
+ new_device->offload_enabled_pending;
+ existing_device->offload_to_mirror = 0;
+ kfree(existing_device->raid_map);
+ existing_device->raid_map = new_device->raid_map;
+
+ /* To prevent this from being freed later. */
+ new_device->raid_map = NULL;
+}
+
+static inline void pqi_free_device(struct pqi_scsi_dev_t *device)
+{
+ if (device) {
+ kfree(device->raid_map);
+ kfree(device);
+ }
+}
+
+/*
+ * Called when exposing a new device to the OS fails in order to re-adjust
+ * our internal SCSI device list to match the SCSI ML's view.
+ */
+
+static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+ list_del(&device->scsi_device_list_entry);
+ spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+ /* Allow the device structure to be freed later. */
+ device->keep_device = false;
+}
+
+static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *new_device_list[], unsigned int num_new_devices)
+{
+ int rc;
+ unsigned int i;
+ unsigned long flags;
+ enum pqi_find_result find_result;
+ struct pqi_scsi_dev_t *device;
+ struct pqi_scsi_dev_t *next;
+ struct pqi_scsi_dev_t *matching_device;
+ struct list_head add_list;
+ struct list_head delete_list;
+
+ INIT_LIST_HEAD(&add_list);
+ INIT_LIST_HEAD(&delete_list);
+
+ /*
+ * The idea here is to do as little work as possible while holding the
+ * spinlock. That's why we go to great pains to defer anything other
+ * than updating the internal device list until after we release the
+ * spinlock.
+ */
+
+ spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+ /* Assume that all devices in the existing list have gone away. */
+ list_for_each_entry(device, &ctrl_info->scsi_device_list,
+ scsi_device_list_entry)
+ device->device_gone = true;
+
+ for (i = 0; i < num_new_devices; i++) {
+ device = new_device_list[i];
+
+ find_result = pqi_scsi_find_entry(ctrl_info, device,
+ &matching_device);
+
+ switch (find_result) {
+ case DEVICE_SAME:
+ /*
+ * The newly found device is already in the existing
+ * device list.
+ */
+ device->new_device = false;
+ matching_device->device_gone = false;
+ pqi_scsi_update_device(matching_device, device);
+ break;
+ case DEVICE_NOT_FOUND:
+ /*
+ * The newly found device is NOT in the existing device
+ * list.
+ */
+ device->new_device = true;
+ break;
+ case DEVICE_CHANGED:
+ /*
+ * The original device has gone away and we need to add
+ * the new device.
+ */
+ device->new_device = true;
+ break;
+ default:
+ WARN_ON(find_result);
+ break;
+ }
+ }
+
+ /* Process all devices that have gone away. */
+ list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
+ scsi_device_list_entry) {
+ if (device->device_gone) {
+ list_del(&device->scsi_device_list_entry);
+ list_add_tail(&device->delete_list_entry, &delete_list);
+ }
+ }
+
+ /* Process all new devices. */
+ for (i = 0; i < num_new_devices; i++) {
+ device = new_device_list[i];
+ if (!device->new_device)
+ continue;
+ if (device->volume_offline)
+ continue;
+ list_add_tail(&device->scsi_device_list_entry,
+ &ctrl_info->scsi_device_list);
+ list_add_tail(&device->add_list_entry, &add_list);
+ /* To prevent this device structure from being freed later. */
+ device->keep_device = true;
+ }
+
+ pqi_update_all_logical_drive_queue_depths(ctrl_info);
+
+ list_for_each_entry(device, &ctrl_info->scsi_device_list,
+ scsi_device_list_entry)
+ device->offload_enabled =
+ device->offload_enabled_pending;
+
+ spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+ list_for_each_entry_safe(device, next, &delete_list,
+ delete_list_entry) {
+ if (device->sdev)
+ pqi_remove_device(ctrl_info, device);
+ pqi_dev_info(ctrl_info, "removed", device);
+ list_del(&device->delete_list_entry);
+ pqi_free_device(device);
+ }
+
+ /*
+ * Notify the SCSI ML if the queue depth of any existing device has
+ * changed.
+ */
+ list_for_each_entry(device, &ctrl_info->scsi_device_list,
+ scsi_device_list_entry) {
+ if (device->sdev && device->queue_depth !=
+ device->advertised_queue_depth) {
+ device->advertised_queue_depth = device->queue_depth;
+ scsi_change_queue_depth(device->sdev,
+ device->advertised_queue_depth);
+ }
+ }
+
+ list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
+ if (device->expose_device && !device->sdev) {
+ rc = pqi_add_device(ctrl_info, device);
+ if (rc) {
+ dev_warn(&ctrl_info->pci_dev->dev,
+ "scsi %d:%d:%d:%d addition failed, device not added\n",
+ ctrl_info->scsi_host->host_no,
+ device->bus, device->target,
+ device->lun);
+ pqi_fixup_botched_add(ctrl_info, device);
+ continue;
+ }
+ }
+
+ pqi_dev_info(ctrl_info, "added", device);
+ }
+
+ /* Process all volumes that are offline. */
+ for (i = 0; i < num_new_devices; i++) {
+ device = new_device_list[i];
+ if (!device->new_device)
+ continue;
+ if (device->volume_offline) {
+ pqi_show_volume_status(ctrl_info, device);
+ pqi_dev_info(ctrl_info, "offline", device);
+ }
+ }
+}
+
+static bool pqi_is_supported_device(struct pqi_scsi_dev_t *device)
+{
+ bool is_supported = false;
+
+ switch (device->devtype) {
+ case TYPE_DISK:
+ case TYPE_ZBC:
+ case TYPE_TAPE:
+ case TYPE_MEDIUM_CHANGER:
+ case TYPE_ENCLOSURE:
+ is_supported = true;
+ break;
+ case TYPE_RAID:
+ /*
+ * Only support the HBA controller itself as a RAID
+ * controller. If it's a RAID controller other than
+ * the HBA itself (an external RAID controller, MSA500
+ * or similar), we don't support it.
+ */
+ if (pqi_is_hba_lunid(device->scsi3addr))
+ is_supported = true;
+ break;
+ }
+
+ return is_supported;
+}
+
+static inline bool pqi_skip_device(u8 *scsi3addr,
+ struct report_phys_lun_extended_entry *phys_lun_ext_entry)
+{
+ u8 device_flags;
+
+ if (!MASKED_DEVICE(scsi3addr))
+ return false;
+
+ /* The device is masked. */
+
+ device_flags = phys_lun_ext_entry->device_flags;
+
+ if (device_flags & REPORT_PHYS_LUN_DEV_FLAG_NON_DISK) {
+ /*
+ * It's a non-disk device. We ignore all devices of this type
+ * when they're masked.
+ */
+ return true;
+ }
+
+ return false;
+}
+
+static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
+{
+ int i;
+ int rc;
+ struct list_head new_device_list_head;
+ struct report_phys_lun_extended *physdev_list = NULL;
+ struct report_log_lun_extended *logdev_list = NULL;
+ struct report_phys_lun_extended_entry *phys_lun_ext_entry;
+ struct report_log_lun_extended_entry *log_lun_ext_entry;
+ struct bmic_identify_physical_device *id_phys = NULL;
+ u32 num_physicals;
+ u32 num_logicals;
+ struct pqi_scsi_dev_t **new_device_list = NULL;
+ struct pqi_scsi_dev_t *device;
+ struct pqi_scsi_dev_t *next;
+ unsigned int num_new_devices;
+ unsigned int num_valid_devices;
+ bool is_physical_device;
+ u8 *scsi3addr;
+ static char *out_of_memory_msg =
+ "out of memory, device discovery stopped";
+
+ atomic_inc(&pqi_statistics.num_scans);
+
+ INIT_LIST_HEAD(&new_device_list_head);
+
+ rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
+ if (rc)
+ goto out;
+
+ if (physdev_list)
+ num_physicals =
+ get_unaligned_be32(&physdev_list->header.list_length)
+ / sizeof(physdev_list->lun_entries[0]);
+ else
+ num_physicals = 0;
+
+ if (logdev_list)
+ num_logicals =
+ get_unaligned_be32(&logdev_list->header.list_length)
+ / sizeof(logdev_list->lun_entries[0]);
+ else
+ num_logicals = 0;
+
+ if (num_physicals) {
+ /*
+ * We need this buffer for calls to pqi_get_physical_disk_info()
+ * below. We allocate it here instead of inside
+ * pqi_get_physical_disk_info() because it's a fairly large
+ * buffer.
+ */
+ id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
+ if (!id_phys) {
+ dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
+ out_of_memory_msg);
+ rc = -ENOMEM;
+ goto out;
+ }
+ }
+
+ num_new_devices = num_physicals + num_logicals;
+
+ new_device_list = kmalloc(sizeof(*new_device_list) *
+ num_new_devices, GFP_KERNEL);
+ if (!new_device_list) {
+ dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ for (i = 0; i < num_new_devices; i++) {
+ device = kzalloc(sizeof(*device), GFP_KERNEL);
+ if (!device) {
+ dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
+ out_of_memory_msg);
+ rc = -ENOMEM;
+ goto out;
+ }
+ list_add_tail(&device->new_device_list_entry,
+ &new_device_list_head);
+ }
+
+ device = NULL;
+ num_valid_devices = 0;
+
+ for (i = 0; i < num_new_devices; i++) {
+
+ if (i < num_physicals) {
+ is_physical_device = true;
+ phys_lun_ext_entry = &physdev_list->lun_entries[i];
+ log_lun_ext_entry = NULL;
+ scsi3addr = phys_lun_ext_entry->lunid;
+ } else {
+ is_physical_device = false;
+ phys_lun_ext_entry = NULL;
+ log_lun_ext_entry =
+ &logdev_list->lun_entries[i - num_physicals];
+ scsi3addr = log_lun_ext_entry->lunid;
+ }
+
+ if (is_physical_device &&
+ pqi_skip_device(scsi3addr, phys_lun_ext_entry))
+ continue;
+
+ if (device)
+ device = list_next_entry(device, new_device_list_entry);
+ else
+ device = list_first_entry(&new_device_list_head,
+ struct pqi_scsi_dev_t, new_device_list_entry);
+
+ memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
+ device->is_physical_device = is_physical_device;
+ device->raid_level = SA_RAID_UNKNOWN;
+
+ /* Gather information about the device. */
+ rc = pqi_get_device_info(ctrl_info, device);
+ if (rc == -ENOMEM) {
+ dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
+ out_of_memory_msg);
+ goto out;
+ }
+ if (rc) {
+ dev_warn(&ctrl_info->pci_dev->dev,
+ "obtaining device info failed, skipping device %016llx\n",
+ get_unaligned_be64(device->scsi3addr));
+ continue;
+ }
+
+ if (!pqi_is_supported_device(device))
+ continue;
+
+ pqi_assign_bus_target_lun(device);
+
+ /*
+ * Expose all devices except for physical devices that
+ * are masked.
+ */
+ if (device->is_physical_device && MASKED_DEVICE(scsi3addr))
+ device->expose_device = false;
+ else
+ device->expose_device = true;
+
+ if (device->is_physical_device) {
+ device->wwid = phys_lun_ext_entry->wwid;
+ if ((phys_lun_ext_entry->device_flags &
+ REPORT_PHYS_LUN_DEV_FLAG_AIO_ENABLED) &&
+ phys_lun_ext_entry->aio_handle)
+ device->aio_enabled = true;
+ } else {
+ memcpy(device->volume_id, log_lun_ext_entry->volume_id,
+ sizeof(device->volume_id));
+ }
+
+ switch (device->devtype) {
+ case TYPE_DISK:
+ case TYPE_ZBC:
+ case TYPE_ENCLOSURE:
+ if (device->is_physical_device) {
+ device->sas_address =
+ get_unaligned_be64(&device->wwid);
+ if (device->devtype == TYPE_DISK ||
+ device->devtype == TYPE_ZBC) {
+ device->aio_handle =
+ phys_lun_ext_entry->aio_handle;
+ pqi_get_physical_disk_info(ctrl_info,
+ device, id_phys);
+ }
+ }
+ break;
+ }
+
+ new_device_list[num_valid_devices++] = device;
+ }
+
+ pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
+
+out:
+ list_for_each_entry_safe(device, next, &new_device_list_head,
+ new_device_list_entry) {
+ if (device->keep_device)
+ continue;
+ list_del(&device->new_device_list_entry);
+ pqi_free_device(device);
+ }
+
+ kfree(new_device_list);
+ kfree(physdev_list);
+ kfree(logdev_list);
+ kfree(id_phys);
+
+ return rc;
+}
+
+static void pqi_remove_all_scsi_devices(struct pqi_ctrl_info *ctrl_info)
+{
+ unsigned long flags;
+ struct pqi_scsi_dev_t *device;
+ struct pqi_scsi_dev_t *next;
+
+ spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+ list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
+ scsi_device_list_entry) {
+ if (device->sdev)
+ pqi_remove_device(ctrl_info, device);
+ list_del(&device->scsi_device_list_entry);
+ pqi_free_device(device);
+ }
+
+ spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+}
+
+static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+
+ if (pqi_ctrl_offline(ctrl_info))
+ return -ENXIO;
+
+ mutex_lock(&ctrl_info->scan_mutex);
+
+ rc = pqi_update_scsi_devices(ctrl_info);
+ if (rc)
+ pqi_schedule_rescan_worker(ctrl_info);
+
+ mutex_unlock(&ctrl_info->scan_mutex);
+
+ return rc;
+}
+
+static void pqi_scan_start(struct Scsi_Host *shost)
+{
+ pqi_scan_scsi_devices(shost_to_hba(shost));
+}
+
+/* Returns TRUE if scan is finished. */
+
+static int pqi_scan_finished(struct Scsi_Host *shost,
+ unsigned long elapsed_time)
+{
+ struct pqi_ctrl_info *ctrl_info;
+
+ ctrl_info = shost_priv(shost);
+
+ return !mutex_is_locked(&ctrl_info->scan_mutex);
+}
+
+static inline void pqi_set_encryption_info(
+ struct pqi_encryption_info *encryption_info, struct raid_map *raid_map,
+ u64 first_block)
+{
+ u32 volume_blk_size;
+
+ /*
+ * Set the encryption tweak values based on logical block address.
+ * If the block size is 512, the tweak value is equal to the LBA.
+ * For other block sizes, tweak value is (LBA * block size) / 512.
+ */
+ volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
+ if (volume_blk_size != 512)
+ first_block = (first_block * volume_blk_size) / 512;
+
+ encryption_info->data_encryption_key_index =
+ get_unaligned_le16(&raid_map->data_encryption_key_index);
+ encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
+ encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
+}
+
+/*
+ * Attempt to perform offload RAID mapping for a logical volume I/O.
+ */
+
+#define PQI_RAID_BYPASS_INELIGIBLE 1
+
+static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device, struct scsi_cmnd *scmd,
+ struct pqi_queue_group *queue_group)
+{
+ struct raid_map *raid_map;
+ bool is_write = false;
+ u32 map_index;
+ u64 first_block;
+ u64 last_block;
+ u32 block_cnt;
+ u32 blocks_per_row;
+ u64 first_row;
+ u64 last_row;
+ u32 first_row_offset;
+ u32 last_row_offset;
+ u32 first_column;
+ u32 last_column;
+ u64 r0_first_row;
+ u64 r0_last_row;
+ u32 r5or6_blocks_per_row;
+ u64 r5or6_first_row;
+ u64 r5or6_last_row;
+ u32 r5or6_first_row_offset;
+ u32 r5or6_last_row_offset;
+ u32 r5or6_first_column;
+ u32 r5or6_last_column;
+ u16 data_disks_per_row;
+ u32 total_disks_per_row;
+ u16 layout_map_count;
+ u32 stripesize;
+ u16 strip_size;
+ u32 first_group;
+ u32 last_group;
+ u32 current_group;
+ u32 map_row;
+ u32 aio_handle;
+ u64 disk_block;
+ u32 disk_block_cnt;
+ u8 cdb[16];
+ u8 cdb_length;
+ int offload_to_mirror;
+ struct pqi_encryption_info *encryption_info_ptr;
+ struct pqi_encryption_info encryption_info;
+#if BITS_PER_LONG == 32
+ u64 tmpdiv;
+#endif
+
+ /* Check for valid opcode, get LBA and block count. */
+ switch (scmd->cmnd[0]) {
+ case WRITE_6:
+ is_write = true;
+ /* fall through */
+ case READ_6:
+ first_block = (u64)get_unaligned_be16(&scmd->cmnd[2]);
+ block_cnt = (u32)scmd->cmnd[4];
+ if (block_cnt == 0)
+ block_cnt = 256;
+ break;
+ case WRITE_10:
+ is_write = true;
+ /* fall through */
+ case READ_10:
+ first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
+ block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
+ break;
+ case WRITE_12:
+ is_write = true;
+ /* fall through */
+ case READ_12:
+ first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
+ block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
+ break;
+ case WRITE_16:
+ is_write = true;
+ /* fall through */
+ case READ_16:
+ first_block = get_unaligned_be64(&scmd->cmnd[2]);
+ block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
+ break;
+ default:
+ /* Process via normal I/O path. */
+ return PQI_RAID_BYPASS_INELIGIBLE;
+ }
+
+ /* Check for write to non-RAID-0. */
+ if (is_write && device->raid_level != SA_RAID_0)
+ return PQI_RAID_BYPASS_INELIGIBLE;
+
+ if (unlikely(block_cnt == 0))
+ return PQI_RAID_BYPASS_INELIGIBLE;
+
+ last_block = first_block + block_cnt - 1;
+ raid_map = device->raid_map;
+
+ /* Check for invalid block or wraparound. */
+ if (last_block >= get_unaligned_le64(&raid_map->volume_blk_cnt) ||
+ last_block < first_block)
+ return PQI_RAID_BYPASS_INELIGIBLE;
+
+ data_disks_per_row = get_unaligned_le16(&raid_map->data_disks_per_row);
+ strip_size = get_unaligned_le16(&raid_map->strip_size);
+ layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
+
+ /* Calculate stripe information for the request. */
+ blocks_per_row = data_disks_per_row * strip_size;
+#if BITS_PER_LONG == 32
+ tmpdiv = first_block;
+ do_div(tmpdiv, blocks_per_row);
+ first_row = tmpdiv;
+ tmpdiv = last_block;
+ do_div(tmpdiv, blocks_per_row);
+ last_row = tmpdiv;
+ first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
+ last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
+ tmpdiv = first_row_offset;
+ do_div(tmpdiv, strip_size);
+ first_column = tmpdiv;
+ tmpdiv = last_row_offset;
+ do_div(tmpdiv, strip_size);
+ last_column = tmpdiv;
+#else
+ first_row = first_block / blocks_per_row;
+ last_row = last_block / blocks_per_row;
+ first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
+ last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
+ first_column = first_row_offset / strip_size;
+ last_column = last_row_offset / strip_size;
+#endif
+
+ /* If this isn't a single row/column then give to the controller. */
+ if (first_row != last_row || first_column != last_column)
+ return PQI_RAID_BYPASS_INELIGIBLE;
+
+ /* Proceeding with driver mapping. */
+ total_disks_per_row = data_disks_per_row +
+ get_unaligned_le16(&raid_map->metadata_disks_per_row);
+ map_row = ((u32)(first_row >> raid_map->parity_rotation_shift)) %
+ get_unaligned_le16(&raid_map->row_cnt);
+ map_index = (map_row * total_disks_per_row) + first_column;
+
+ /* RAID 1 */
+ if (device->raid_level == SA_RAID_1) {
+ if (device->offload_to_mirror)
+ map_index += data_disks_per_row;
+ device->offload_to_mirror = !device->offload_to_mirror;
+ } else if (device->raid_level == SA_RAID_ADM) {
+ /* RAID ADM */
+ /*
+ * Handles N-way mirrors (R1-ADM) and R10 with # of drives
+ * divisible by 3.
+ */
+ offload_to_mirror = device->offload_to_mirror;
+ if (offload_to_mirror == 0) {
+ /* use physical disk in the first mirrored group. */
+ map_index %= data_disks_per_row;
+ } else {
+ do {
+ /*
+ * Determine mirror group that map_index
+ * indicates.
+ */
+ current_group = map_index / data_disks_per_row;
+
+ if (offload_to_mirror != current_group) {
+ if (current_group <
+ layout_map_count - 1) {
+ /*
+ * Select raid index from
+ * next group.
+ */
+ map_index += data_disks_per_row;
+ current_group++;
+ } else {
+ /*
+ * Select raid index from first
+ * group.
+ */
+ map_index %= data_disks_per_row;
+ current_group = 0;
+ }
+ }
+ } while (offload_to_mirror != current_group);
+ }
+
+ /* Set mirror group to use next time. */
+ offload_to_mirror =
+ (offload_to_mirror >= layout_map_count - 1) ?
+ 0 : offload_to_mirror + 1;
+ WARN_ON(offload_to_mirror >= layout_map_count);
+ device->offload_to_mirror = offload_to_mirror;
+ /*
+ * Avoid direct use of device->offload_to_mirror within this
+ * function since multiple threads might simultaneously
+ * increment it beyond the range of device->layout_map_count -1.
+ */
+ } else if ((device->raid_level == SA_RAID_5 ||
+ device->raid_level == SA_RAID_6) && layout_map_count > 1) {
+ /* RAID 50/60 */
+ /* Verify first and last block are in same RAID group */
+ r5or6_blocks_per_row = strip_size * data_disks_per_row;
+ stripesize = r5or6_blocks_per_row * layout_map_count;
+#if BITS_PER_LONG == 32
+ tmpdiv = first_block;
+ first_group = do_div(tmpdiv, stripesize);
+ tmpdiv = first_group;
+ do_div(tmpdiv, r5or6_blocks_per_row);
+ first_group = tmpdiv;
+ tmpdiv = last_block;
+ last_group = do_div(tmpdiv, stripesize);
+ tmpdiv = last_group;
+ do_div(tmpdiv, r5or6_blocks_per_row);
+ last_group = tmpdiv;
+#else
+ first_group = (first_block % stripesize) / r5or6_blocks_per_row;
+ last_group = (last_block % stripesize) / r5or6_blocks_per_row;
+#endif
+ if (first_group != last_group)
+ return PQI_RAID_BYPASS_INELIGIBLE;
+
+ /* Verify request is in a single row of RAID 5/6 */
+#if BITS_PER_LONG == 32
+ tmpdiv = first_block;
+ do_div(tmpdiv, stripesize);
+ first_row = r5or6_first_row = r0_first_row = tmpdiv;
+ tmpdiv = last_block;
+ do_div(tmpdiv, stripesize);
+ r5or6_last_row = r0_last_row = tmpdiv;
+#else
+ first_row = r5or6_first_row = r0_first_row =
+ first_block / stripesize;
+ r5or6_last_row = r0_last_row = last_block / stripesize;
+#endif
+ if (r5or6_first_row != r5or6_last_row)
+ return PQI_RAID_BYPASS_INELIGIBLE;
+
+ /* Verify request is in a single column */
+#if BITS_PER_LONG == 32
+ tmpdiv = first_block;
+ first_row_offset = do_div(tmpdiv, stripesize);
+ tmpdiv = first_row_offset;
+ first_row_offset = (u32)do_div(tmpdiv, r5or6_blocks_per_row);
+ r5or6_first_row_offset = first_row_offset;
+ tmpdiv = last_block;
+ r5or6_last_row_offset = do_div(tmpdiv, stripesize);
+ tmpdiv = r5or6_last_row_offset;
+ r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
+ tmpdiv = r5or6_first_row_offset;
+ do_div(tmpdiv, strip_size);
+ first_column = r5or6_first_column = tmpdiv;
+ tmpdiv = r5or6_last_row_offset;
+ do_div(tmpdiv, strip_size);
+ r5or6_last_column = tmpdiv;
+#else
+ first_row_offset = r5or6_first_row_offset =
+ (u32)((first_block % stripesize) %
+ r5or6_blocks_per_row);
+
+ r5or6_last_row_offset =
+ (u32)((last_block % stripesize) %
+ r5or6_blocks_per_row);
+
+ first_column = r5or6_first_row_offset / strip_size;
+ r5or6_first_column = first_column;
+ r5or6_last_column = r5or6_last_row_offset / strip_size;
+#endif
+ if (r5or6_first_column != r5or6_last_column)
+ return PQI_RAID_BYPASS_INELIGIBLE;
+
+ /* Request is eligible */
+ map_row =
+ ((u32)(first_row >> raid_map->parity_rotation_shift)) %
+ get_unaligned_le16(&raid_map->row_cnt);
+
+ map_index = (first_group *
+ (get_unaligned_le16(&raid_map->row_cnt) *
+ total_disks_per_row)) +
+ (map_row * total_disks_per_row) + first_column;
+ }
+
+ if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
+ return PQI_RAID_BYPASS_INELIGIBLE;
+
+ aio_handle = raid_map->disk_data[map_index].aio_handle;
+ disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
+ first_row * strip_size +
+ (first_row_offset - first_column * strip_size);
+ disk_block_cnt = block_cnt;
+
+ /* Handle differing logical/physical block sizes. */
+ if (raid_map->phys_blk_shift) {
+ disk_block <<= raid_map->phys_blk_shift;
+ disk_block_cnt <<= raid_map->phys_blk_shift;
+ }
+
+ if (unlikely(disk_block_cnt > 0xffff))
+ return PQI_RAID_BYPASS_INELIGIBLE;
+
+ /* Build the new CDB for the physical disk I/O. */
+ if (disk_block > 0xffffffff) {
+ cdb[0] = is_write ? WRITE_16 : READ_16;
+ cdb[1] = 0;
+ put_unaligned_be64(disk_block, &cdb[2]);
+ put_unaligned_be32(disk_block_cnt, &cdb[10]);
+ cdb[14] = 0;
+ cdb[15] = 0;
+ cdb_length = 16;
+ } else {
+ cdb[0] = is_write ? WRITE_10 : READ_10;
+ cdb[1] = 0;
+ put_unaligned_be32((u32)disk_block, &cdb[2]);
+ cdb[6] = 0;
+ put_unaligned_be16((u16)disk_block_cnt, &cdb[7]);
+ cdb[9] = 0;
+ cdb_length = 10;
+ }
+
+ if (get_unaligned_le16(&raid_map->flags) &
+ RAID_MAP_ENCRYPTION_ENABLED) {
+ pqi_set_encryption_info(&encryption_info, raid_map,
+ first_block);
+ encryption_info_ptr = &encryption_info;
+ } else {
+ encryption_info_ptr = NULL;
+ }
+
+ return pqi_aio_submit_io(ctrl_info, scmd, aio_handle,
+ cdb, cdb_length, queue_group, encryption_info_ptr);
+}
+
+#define PQI_STATUS_IDLE 0x0
+
+#define PQI_CREATE_ADMIN_QUEUE_PAIR 1
+#define PQI_DELETE_ADMIN_QUEUE_PAIR 2
+
+#define PQI_DEVICE_STATE_POWER_ON_AND_RESET 0x0
+#define PQI_DEVICE_STATE_STATUS_AVAILABLE 0x1
+#define PQI_DEVICE_STATE_ALL_REGISTERS_READY 0x2
+#define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY 0x3
+#define PQI_DEVICE_STATE_ERROR 0x4
+
+#define PQI_MODE_READY_TIMEOUT_SECS 30
+#define PQI_MODE_READY_POLL_INTERVAL_MSECS 1
+
+static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
+{
+ struct pqi_device_registers __iomem *pqi_registers;
+ unsigned long timeout;
+ u64 signature;
+ u8 status;
+
+ pqi_registers = ctrl_info->pqi_registers;
+ timeout = (PQI_MODE_READY_TIMEOUT_SECS * HZ) + jiffies;
+
+ while (1) {
+ signature = readq(&pqi_registers->signature);
+ if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
+ sizeof(signature)) == 0)
+ break;
+ if (time_after(jiffies, timeout)) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "timed out waiting for PQI signature\n");
+ return -ETIMEDOUT;
+ }
+ msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
+ }
+
+ while (1) {
+ status = readb(&pqi_registers->function_and_status_code);
+ if (status == PQI_STATUS_IDLE)
+ break;
+ if (time_after(jiffies, timeout)) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "timed out waiting for PQI IDLE\n");
+ return -ETIMEDOUT;
+ }
+ msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
+ }
+
+ while (1) {
+ if (readl(&pqi_registers->device_status) ==
+ PQI_DEVICE_STATE_ALL_REGISTERS_READY)
+ break;
+ if (time_after(jiffies, timeout)) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "timed out waiting for PQI all registers ready\n");
+ return -ETIMEDOUT;
+ }
+ msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
+ }
+
+ return 0;
+}
+
+static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
+{
+ struct pqi_scsi_dev_t *device;
+
+ device = io_request->scmd->device->hostdata;
+ device->offload_enabled = false;
+}
+
+static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
+{
+ u8 host_byte;
+ struct scsi_cmnd *scmd;
+ struct pqi_raid_error_info *error_info;
+ size_t sense_data_length;
+ int residual_count;
+ int xfer_count;
+
+ scmd = io_request->scmd;
+ if (!scmd)
+ return;
+
+ error_info = io_request->error_info;
+ host_byte = DID_OK;
+
+ if (error_info->data_out_result == PQI_DATA_IN_OUT_UNDERFLOW) {
+ xfer_count =
+ get_unaligned_le32(&error_info->data_out_transferred);
+ residual_count = scsi_bufflen(scmd) - xfer_count;
+ scsi_set_resid(scmd, residual_count);
+ if (xfer_count < scmd->underflow)
+ host_byte = DID_SOFT_ERROR;
+ }
+
+ sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
+ if (sense_data_length == 0)
+ sense_data_length =
+ get_unaligned_le16(&error_info->response_data_length);
+ if (sense_data_length) {
+ if (sense_data_length > sizeof(error_info->data))
+ sense_data_length = sizeof(error_info->data);
+ if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
+ sense_data_length = SCSI_SENSE_BUFFERSIZE;
+ memcpy(scmd->sense_buffer, error_info->data,
+ sense_data_length);
+ }
+
+ scmd->result = error_info->status;
+ set_host_byte(scmd, host_byte);
+}
+
+static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
+{
+ u8 scsi_status;
+ u8 host_byte;
+ struct scsi_cmnd *scmd;
+ struct pqi_aio_error_info *error_info;
+ size_t sense_data_length;
+ int residual_count;
+ int xfer_count;
+
+ scmd = io_request->scmd;
+ error_info = io_request->error_info;
+ host_byte = DID_OK;
+
+ switch (error_info->service_response) {
+ case PQI_AIO_SERV_RESPONSE_COMPLETE:
+ scsi_status = error_info->status;
+ break;
+ case PQI_AIO_SERV_RESPONSE_FAILURE:
+ switch (error_info->status) {
+ case PQI_AIO_STATUS_IO_ABORTED:
+ scsi_status = SAM_STAT_TASK_ABORTED;
+ break;
+ case PQI_AIO_STATUS_UNDERRUN:
+ scsi_status = SAM_STAT_GOOD;
+ residual_count = get_unaligned_le32(
+ &error_info->residual_count);
+ scsi_set_resid(scmd, residual_count);
+ xfer_count = scsi_bufflen(scmd) - residual_count;
+ if (xfer_count < scmd->underflow)
+ host_byte = DID_SOFT_ERROR;
+ break;
+ case PQI_AIO_STATUS_OVERRUN:
+ scsi_status = SAM_STAT_GOOD;
+ break;
+ case PQI_AIO_STATUS_AIO_PATH_DISABLED:
+ pqi_aio_path_disabled(io_request);
+ scsi_status = SAM_STAT_GOOD;
+ io_request->status = -EAGAIN;
+ break;
+ case PQI_AIO_STATUS_IO_ERROR:
+ case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
+ case PQI_AIO_STATUS_INVALID_DEVICE:
+ default:
+ scsi_status = SAM_STAT_CHECK_CONDITION;
+ break;
+ }
+ break;
+ case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
+ case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
+ scsi_status = SAM_STAT_GOOD;
+ break;
+ case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
+ case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
+ scsi_status = SAM_STAT_CHECK_CONDITION;
+ break;
+ default:
+ scsi_status = SAM_STAT_CHECK_CONDITION;
+ break;
+ }
+
+ if (error_info->data_present) {
+ sense_data_length =
+ get_unaligned_le16(&error_info->data_length);
+ if (sense_data_length) {
+ if (sense_data_length > sizeof(error_info->data))
+ sense_data_length = sizeof(error_info->data);
+ if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
+ sense_data_length = SCSI_SENSE_BUFFERSIZE;
+ memcpy(scmd->sense_buffer, error_info->data,
+ sense_data_length);
+ }
+ }
+
+ scmd->result = scsi_status;
+ set_host_byte(scmd, host_byte);
+}
+
+static void pqi_process_io_error(unsigned int iu_type,
+ struct pqi_io_request *io_request)
+{
+ switch (iu_type) {
+ case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
+ pqi_process_raid_io_error(io_request);
+ break;
+ case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
+ pqi_process_aio_io_error(io_request);
+ break;
+ }
+}
+
+static int pqi_interpret_task_management_response(
+ struct pqi_task_management_response *response)
+{
+ int rc;
+
+ switch (response->response_code) {
+ case SOP_TASK_MANAGEMENT_FUNCTION_COMPLETE:
+ case SOP_TASK_MANAGEMENT_FUNCTION_SUCCEEDED:
+ rc = 0;
+ break;
+ default:
+ rc = -EIO;
+ break;
+ }
+
+ return rc;
+}
+
+static unsigned int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_queue_group *queue_group)
+{
+ unsigned int num_responses;
+ pqi_index_t oq_pi;
+ pqi_index_t oq_ci;
+ struct pqi_io_request *io_request;
+ struct pqi_io_response *response;
+ u16 request_id;
+
+ num_responses = 0;
+ oq_ci = queue_group->oq_ci_copy;
+
+ while (1) {
+ oq_pi = *queue_group->oq_pi;
+ if (oq_pi == oq_ci)
+ break;
+
+ num_responses++;
+ response = queue_group->oq_element_array +
+ (oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
+
+ request_id = get_unaligned_le16(&response->request_id);
+ WARN_ON(request_id >= ctrl_info->max_io_slots);
+
+ io_request = &ctrl_info->io_request_pool[request_id];
+ WARN_ON(atomic_read(&io_request->refcount) == 0);
+
+ switch (response->header.iu_type) {
+ case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
+ case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
+ case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
+ break;
+ case PQI_RESPONSE_IU_TASK_MANAGEMENT:
+ io_request->status =
+ pqi_interpret_task_management_response(
+ (void *)response);
+ break;
+ case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
+ pqi_aio_path_disabled(io_request);
+ io_request->status = -EAGAIN;
+ break;
+ case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
+ case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
+ io_request->error_info = ctrl_info->error_buffer +
+ (get_unaligned_le16(&response->error_index) *
+ PQI_ERROR_BUFFER_ELEMENT_LENGTH);
+ pqi_process_io_error(response->header.iu_type,
+ io_request);
+ break;
+ default:
+ dev_err(&ctrl_info->pci_dev->dev,
+ "unexpected IU type: 0x%x\n",
+ response->header.iu_type);
+ WARN_ON(response->header.iu_type);
+ break;
+ }
+
+ io_request->io_complete_callback(io_request,
+ io_request->context);
+
+ /*
+ * Note that the I/O request structure CANNOT BE TOUCHED after
+ * returning from the I/O completion callback!
+ */
+
+ switch (response->header.iu_type) {
+ case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
+ case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
+ case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
+ case PQI_RESPONSE_IU_TASK_MANAGEMENT:
+ atomic_dec(&pqi_statistics.
+ num_outstanding_requests[RAID_PATH]);
+ break;
+ case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
+ case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
+ case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
+ atomic_dec(&pqi_statistics.
+ num_outstanding_requests[AIO_PATH]);
+ break;
+ }
+
+ oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
+ }
+
+ if (num_responses) {
+ queue_group->oq_ci_copy = oq_ci;
+ writel(oq_ci, queue_group->oq_ci);
+ }
+
+ return num_responses;
+}
+
+static inline unsigned int pqi_num_elements_free(unsigned int pi,
+ unsigned int ci,
+ unsigned int elements_in_queue)
+{
+ unsigned int num_elements_used;
+
+ if (pi >= ci)
+ num_elements_used = pi - ci;
+ else
+ num_elements_used = elements_in_queue - ci + pi;
+
+ return elements_in_queue - num_elements_used - 1;
+}
+
+static void pqi_start_event_ack(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_event_acknowledge_request *iu, size_t iu_length)
+{
+ pqi_index_t iq_pi;
+ pqi_index_t iq_ci;
+ unsigned long flags;
+ void *next_element;
+ unsigned long timeout;
+ struct pqi_queue_group *queue_group;
+
+ queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
+ put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
+
+ timeout = (10 * HZ) + jiffies;
+
+ while (1) {
+ spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
+
+ iq_pi = queue_group->iq_pi_copy[RAID_PATH];
+ iq_ci = *queue_group->iq_ci[RAID_PATH];
+
+ if (pqi_num_elements_free(iq_pi,
+ iq_ci, ctrl_info->num_elements_per_iq))
+ break;
+
+ spin_unlock_irqrestore(
+ &queue_group->submit_lock[RAID_PATH], flags);
+
+ if (time_after(jiffies, timeout)) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "wait for event acknowledge timed out\n");
+ return;
+ }
+ }
+
+ next_element = queue_group->iq_element_array[RAID_PATH] +
+ (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
+
+ memcpy(next_element, iu, iu_length);
+
+ iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
+
+ atomic_inc(&pqi_statistics.num_requests[RAID_PATH]);
+ atomic_inc(&pqi_statistics.num_outstanding_requests[RAID_PATH]);
+
+ queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
+
+ /*
+ * This write notifies the controller that an IU is available to be
+ * processed.
+ */
+ writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
+
+ spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
+
+ /*
+ * We have to special-case this type of request because the firmware
+ * does not generate an interrupt when this type of request completes.
+ * Therefore, we have to poll until we see that the firmware has
+ * consumed the request before we move on.
+ */
+
+ while (1) {
+ if (*queue_group->iq_ci[RAID_PATH] == iq_pi) {
+ atomic_dec(
+ &pqi_statistics.num_outstanding_requests[RAID_PATH]);
+ break;
+ }
+ if (time_after(jiffies, timeout)) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "wait for event acknowledge timed out\n");
+ break;
+ }
+ usleep_range(1000, 2000);
+ }
+}
+
+static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_event *event)
+{
+ struct pqi_event_acknowledge_request request;
+
+ memset(&request, 0, sizeof(request));
+
+ request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
+ put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
+ &request.header.iu_length);
+ request.event_type = event->event_type;
+ request.event_id = event->event_id;
+ request.additional_event_id = event->additional_event_id;
+
+ pqi_start_event_ack(ctrl_info, &request, sizeof(request));
+}
+
+static void pqi_event_worker(struct work_struct *work)
+{
+ unsigned int i;
+ struct pqi_ctrl_info *ctrl_info;
+ struct pqi_event *pending_event;
+ bool got_non_heartbeat_event = false;
+
+ ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
+
+ pending_event = ctrl_info->pending_events;
+ for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
+ if (pending_event->pending) {
+ pending_event->pending = false;
+ pqi_acknowledge_event(ctrl_info, pending_event);
+ if (i != PQI_EVENT_HEARTBEAT)
+ got_non_heartbeat_event = true;
+ }
+ pending_event++;
+ }
+
+ if (got_non_heartbeat_event)
+ pqi_schedule_rescan_worker(ctrl_info);
+}
+
+static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
+{
+ unsigned int i;
+ unsigned int path;
+ struct pqi_queue_group *queue_group;
+ unsigned long flags;
+ struct pqi_io_request *io_request;
+ struct pqi_io_request *next;
+ struct scsi_cmnd *scmd;
+
+ ctrl_info->controller_online = false;
+ dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
+
+ for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+ queue_group = &ctrl_info->queue_groups[i];
+
+ for (path = 0; path < 2; path++) {
+ spin_lock_irqsave(
+ &queue_group->submit_lock[path], flags);
+
+ list_for_each_entry_safe(io_request, next,
+ &queue_group->request_list[path],
+ request_list_entry) {
+
+ scmd = io_request->scmd;
+ if (scmd) {
+ set_host_byte(scmd, DID_NO_CONNECT);
+ pqi_scsi_done(scmd);
+ }
+
+ list_del(&io_request->request_list_entry);
+ }
+
+ spin_unlock_irqrestore(
+ &queue_group->submit_lock[path], flags);
+ }
+ }
+}
+
+#define PQI_HEARTBEAT_TIMER_INTERVAL (5 * HZ)
+#define PQI_MAX_HEARTBEAT_REQUESTS 5
+
+static void pqi_heartbeat_timer_handler(unsigned long data)
+{
+ int num_interrupts;
+ struct pqi_ctrl_info *ctrl_info = (struct pqi_ctrl_info *)data;
+
+ num_interrupts = atomic_read(&ctrl_info->num_interrupts);
+
+ if (num_interrupts == ctrl_info->previous_num_interrupts) {
+ ctrl_info->num_heartbeats_requested++;
+ if (ctrl_info->num_heartbeats_requested >
+ PQI_MAX_HEARTBEAT_REQUESTS) {
+ pqi_take_ctrl_offline(ctrl_info);
+ return;
+ }
+ ctrl_info->pending_events[PQI_EVENT_HEARTBEAT].pending = true;
+ schedule_work(&ctrl_info->event_work);
+ } else {
+ ctrl_info->num_heartbeats_requested = 0;
+ }
+
+ ctrl_info->previous_num_interrupts = num_interrupts;
+ mod_timer(&ctrl_info->heartbeat_timer,
+ jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
+}
+
+static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
+{
+ ctrl_info->previous_num_interrupts =
+ atomic_read(&ctrl_info->num_interrupts);
+
+ init_timer(&ctrl_info->heartbeat_timer);
+ ctrl_info->heartbeat_timer.expires =
+ jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
+ ctrl_info->heartbeat_timer.data = (unsigned long)ctrl_info;
+ ctrl_info->heartbeat_timer.function = pqi_heartbeat_timer_handler;
+ add_timer(&ctrl_info->heartbeat_timer);
+ ctrl_info->heartbeat_timer_started = true;
+}
+
+static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
+{
+ if (ctrl_info->heartbeat_timer_started)
+ del_timer_sync(&ctrl_info->heartbeat_timer);
+}
+
+static int pqi_event_type_to_event_index(unsigned int event_type)
+{
+ int index;
+
+ switch (event_type) {
+ case PQI_EVENT_TYPE_HEARTBEAT:
+ index = PQI_EVENT_HEARTBEAT;
+ break;
+ case PQI_EVENT_TYPE_HOTPLUG:
+ index = PQI_EVENT_HOTPLUG;
+ break;
+ case PQI_EVENT_TYPE_HARDWARE:
+ index = PQI_EVENT_HARDWARE;
+ break;
+ case PQI_EVENT_TYPE_PHYSICAL_DEVICE:
+ index = PQI_EVENT_PHYSICAL_DEVICE;
+ break;
+ case PQI_EVENT_TYPE_LOGICAL_DEVICE:
+ index = PQI_EVENT_LOGICAL_DEVICE;
+ break;
+ case PQI_EVENT_TYPE_AIO_STATE_CHANGE:
+ index = PQI_EVENT_AIO_STATE_CHANGE;
+ break;
+ case PQI_EVENT_TYPE_AIO_CONFIG_CHANGE:
+ index = PQI_EVENT_AIO_CONFIG_CHANGE;
+ break;
+ default:
+ index = -1;
+ break;
+ }
+
+ return index;
+}
+
+static unsigned int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
+{
+ unsigned int num_events;
+ pqi_index_t oq_pi;
+ pqi_index_t oq_ci;
+ struct pqi_event_queue *event_queue;
+ struct pqi_event_response *response;
+ struct pqi_event *pending_event;
+ bool need_delayed_work;
+ int event_index;
+
+ event_queue = &ctrl_info->event_queue;
+ num_events = 0;
+ need_delayed_work = false;
+ oq_ci = event_queue->oq_ci_copy;
+
+ while (1) {
+ oq_pi = *event_queue->oq_pi;
+ if (oq_pi == oq_ci)
+ break;
+
+ num_events++;
+ response = event_queue->oq_element_array +
+ (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
+
+ if (response->event_type == PQI_EVENT_TYPE_HEARTBEAT)
+ atomic_inc(&pqi_statistics.num_heartbeat_events);
+ else
+ atomic_inc(&pqi_statistics.num_all_other_events);
+
+ event_index =
+ pqi_event_type_to_event_index(response->event_type);
+
+ if (event_index >= 0) {
+ if (response->request_acknowlege) {
+ pending_event =
+ &ctrl_info->pending_events[event_index];
+ pending_event->event_type =
+ response->event_type;
+ pending_event->event_id = response->event_id;
+ pending_event->additional_event_id =
+ response->additional_event_id;
+ if (event_index != PQI_EVENT_HEARTBEAT) {
+ pending_event->pending = true;
+ need_delayed_work = true;
+ }
+ }
+ }
+
+ oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
+ }
+
+ if (num_events) {
+ event_queue->oq_ci_copy = oq_ci;
+ writel(oq_ci, event_queue->oq_ci);
+
+ if (need_delayed_work)
+ schedule_work(&ctrl_info->event_work);
+ }
+
+ return num_events;
+}
+
+static irqreturn_t pqi_irq_handler(int irq, void *data)
+{
+ struct pqi_ctrl_info *ctrl_info;
+ struct pqi_queue_group *queue_group;
+ unsigned int num_responses_handled;
+
+ atomic_inc(&pqi_statistics.num_interrupts);
+
+ queue_group = data;
+ ctrl_info = queue_group->ctrl_info;
+
+ if (!ctrl_info || !queue_group->oq_ci)
+ return IRQ_NONE;
+
+ if (queue_group->int_msg_num != smp_processor_id())
+ atomic_inc(&pqi_statistics.num_interrupts_wrong_cpu);
+
+ num_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
+
+ if (irq == ctrl_info->event_irq)
+ num_responses_handled += pqi_process_event_intr(ctrl_info);
+
+ if (num_responses_handled == 0)
+ atomic_inc(&pqi_statistics.num_spurious_interrupts);
+ else
+ atomic_inc(&ctrl_info->num_interrupts);
+
+ pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
+ pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
+
+ return IRQ_HANDLED;
+}
+
+static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
+{
+ int i;
+ int rc;
+
+ ctrl_info->event_irq = ctrl_info->msix_vectors[0];
+
+ for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
+ rc = request_irq(ctrl_info->msix_vectors[i],
+ pqi_irq_handler, 0,
+ DRIVER_NAME_SHORT, ctrl_info->intr_data[i]);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "irq %u init failed with error %d\n",
+ ctrl_info->msix_vectors[i], rc);
+ return rc;
+ }
+ ctrl_info->num_msix_vectors_initialized++;
+ }
+
+ return 0;
+}
+
+static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
+{
+ int i;
+
+ for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
+ free_irq(ctrl_info->msix_vectors[i],
+ ctrl_info->intr_data[i]);
+}
+
+static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
+{
+ unsigned int i;
+ int max_vectors;
+ int num_vectors_enabled;
+ struct msix_entry msix_entries[PQI_MAX_MSIX_VECTORS];
+
+ max_vectors = ctrl_info->num_queue_groups;
+
+ for (i = 0; i < max_vectors; i++)
+ msix_entries[i].entry = i;
+
+ num_vectors_enabled = pci_enable_msix_range(ctrl_info->pci_dev,
+ msix_entries, PQI_MIN_MSIX_VECTORS, max_vectors);
+
+ if (num_vectors_enabled < 0) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "MSI-X init failed with error %d\n",
+ num_vectors_enabled);
+ return num_vectors_enabled;
+ }
+
+ ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
+ for (i = 0; i < num_vectors_enabled; i++) {
+ ctrl_info->msix_vectors[i] = msix_entries[i].vector;
+ ctrl_info->intr_data[i] = &ctrl_info->queue_groups[i];
+ }
+
+ return 0;
+}
+
+static void pqi_irq_set_affinity_hint(struct pqi_ctrl_info *ctrl_info)
+{
+ int i;
+ int rc;
+ int cpu;
+
+ cpu = cpumask_first(cpu_online_mask);
+ for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++) {
+ rc = irq_set_affinity_hint(ctrl_info->msix_vectors[i],
+ get_cpu_mask(cpu));
+ if (rc)
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error %d setting affinity hint for irq vector %u\n",
+ rc, ctrl_info->msix_vectors[i]);
+ cpu = cpumask_next(cpu, cpu_online_mask);
+ }
+}
+
+static void pqi_irq_unset_affinity_hint(struct pqi_ctrl_info *ctrl_info)
+{
+ int i;
+
+ for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
+ irq_set_affinity_hint(ctrl_info->msix_vectors[i], NULL);
+}
+
+static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
+{
+ unsigned int i;
+ size_t alloc_length;
+ size_t element_array_length_per_iq;
+ size_t element_array_length_per_oq;
+ void *element_array;
+ void *next_queue_index;
+ void *aligned_pointer;
+ unsigned int num_inbound_queues;
+ unsigned int num_outbound_queues;
+ unsigned int num_queue_indexes;
+ struct pqi_queue_group *queue_group;
+
+ element_array_length_per_iq =
+ PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
+ ctrl_info->num_elements_per_iq;
+ element_array_length_per_oq =
+ PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
+ ctrl_info->num_elements_per_oq;
+ num_inbound_queues = ctrl_info->num_queue_groups * 2;
+ num_outbound_queues = ctrl_info->num_queue_groups;
+ num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
+
+ aligned_pointer = NULL;
+
+ for (i = 0; i < num_inbound_queues; i++) {
+ aligned_pointer = PTR_ALIGN(aligned_pointer,
+ PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
+ aligned_pointer += element_array_length_per_iq;
+ }
+
+ for (i = 0; i < num_outbound_queues; i++) {
+ aligned_pointer = PTR_ALIGN(aligned_pointer,
+ PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
+ aligned_pointer += element_array_length_per_oq;
+ }
+
+ aligned_pointer = PTR_ALIGN(aligned_pointer,
+ PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
+ aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
+ PQI_EVENT_OQ_ELEMENT_LENGTH;
+
+ for (i = 0; i < num_queue_indexes; i++) {
+ aligned_pointer = PTR_ALIGN(aligned_pointer,
+ PQI_OPERATIONAL_INDEX_ALIGNMENT);
+ aligned_pointer += sizeof(pqi_index_t);
+ }
+
+ alloc_length = (size_t)aligned_pointer +
+ PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
+
+ ctrl_info->queue_memory_base =
+ dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
+ alloc_length,
+ &ctrl_info->queue_memory_base_dma_handle, GFP_KERNEL);
+
+ if (!ctrl_info->queue_memory_base) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "failed to allocate memory for PQI admin queues\n");
+ return -ENOMEM;
+ }
+
+ ctrl_info->queue_memory_length = alloc_length;
+
+ element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
+ PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
+
+ for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+ queue_group = &ctrl_info->queue_groups[i];
+ queue_group->iq_element_array[RAID_PATH] = element_array;
+ queue_group->iq_element_array_bus_addr[RAID_PATH] =
+ ctrl_info->queue_memory_base_dma_handle +
+ (element_array - ctrl_info->queue_memory_base);
+ element_array += element_array_length_per_iq;
+ element_array = PTR_ALIGN(element_array,
+ PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
+ queue_group->iq_element_array[AIO_PATH] = element_array;
+ queue_group->iq_element_array_bus_addr[AIO_PATH] =
+ ctrl_info->queue_memory_base_dma_handle +
+ (element_array - ctrl_info->queue_memory_base);
+ element_array += element_array_length_per_iq;
+ element_array = PTR_ALIGN(element_array,
+ PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
+ }
+
+ for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+ queue_group = &ctrl_info->queue_groups[i];
+ queue_group->oq_element_array = element_array;
+ queue_group->oq_element_array_bus_addr =
+ ctrl_info->queue_memory_base_dma_handle +
+ (element_array - ctrl_info->queue_memory_base);
+ element_array += element_array_length_per_oq;
+ element_array = PTR_ALIGN(element_array,
+ PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
+ }
+
+ ctrl_info->event_queue.oq_element_array = element_array;
+ ctrl_info->event_queue.oq_element_array_bus_addr =
+ ctrl_info->queue_memory_base_dma_handle +
+ (element_array - ctrl_info->queue_memory_base);
+ element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
+ PQI_EVENT_OQ_ELEMENT_LENGTH;
+
+ next_queue_index = PTR_ALIGN(element_array,
+ PQI_OPERATIONAL_INDEX_ALIGNMENT);
+
+ for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+ queue_group = &ctrl_info->queue_groups[i];
+ queue_group->iq_ci[RAID_PATH] = next_queue_index;
+ queue_group->iq_ci_bus_addr[RAID_PATH] =
+ ctrl_info->queue_memory_base_dma_handle +
+ (next_queue_index - ctrl_info->queue_memory_base);
+ next_queue_index += sizeof(pqi_index_t);
+ next_queue_index = PTR_ALIGN(next_queue_index,
+ PQI_OPERATIONAL_INDEX_ALIGNMENT);
+ queue_group->iq_ci[AIO_PATH] = next_queue_index;
+ queue_group->iq_ci_bus_addr[AIO_PATH] =
+ ctrl_info->queue_memory_base_dma_handle +
+ (next_queue_index - ctrl_info->queue_memory_base);
+ next_queue_index += sizeof(pqi_index_t);
+ next_queue_index = PTR_ALIGN(next_queue_index,
+ PQI_OPERATIONAL_INDEX_ALIGNMENT);
+ queue_group->oq_pi = next_queue_index;
+ queue_group->oq_pi_bus_addr =
+ ctrl_info->queue_memory_base_dma_handle +
+ (next_queue_index - ctrl_info->queue_memory_base);
+ next_queue_index += sizeof(pqi_index_t);
+ next_queue_index = PTR_ALIGN(next_queue_index,
+ PQI_OPERATIONAL_INDEX_ALIGNMENT);
+ }
+
+ ctrl_info->event_queue.oq_pi = next_queue_index;
+ ctrl_info->event_queue.oq_pi_bus_addr =
+ ctrl_info->queue_memory_base_dma_handle +
+ (next_queue_index - ctrl_info->queue_memory_base);
+
+ return 0;
+}
+
+static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
+{
+ unsigned int i;
+ u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
+ u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
+
+ /*
+ * Initialize the backpointers to the controller structure in
+ * each operational queue group structure.
+ */
+ for (i = 0; i < ctrl_info->num_queue_groups; i++)
+ ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
+
+ /*
+ * Assign IDs to all operational queues. Note that the IDs
+ * assigned to operational IQs are independent of the IDs
+ * assigned to operational OQs.
+ */
+ ctrl_info->event_queue.oq_id = next_oq_id++;
+ for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+ ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
+ ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
+ ctrl_info->queue_groups[i].oq_id = next_oq_id++;
+ }
+
+ /*
+ * Assign MSI-X table entry indexes to all queues. Note that the
+ * interrupt for the event queue is shared with the first queue group.
+ */
+ ctrl_info->event_queue.int_msg_num = 0;
+ for (i = 0; i < ctrl_info->num_queue_groups; i++)
+ ctrl_info->queue_groups[i].int_msg_num = i;
+
+ for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+ spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
+ spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
+ INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
+ INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
+ }
+}
+
+static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
+{
+ size_t alloc_length;
+ struct pqi_admin_queues_aligned *admin_queues_aligned;
+ struct pqi_admin_queues *admin_queues;
+
+ alloc_length = sizeof(struct pqi_admin_queues_aligned) +
+ PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
+
+ ctrl_info->admin_queue_memory_base =
+ dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
+ alloc_length,
+ &ctrl_info->admin_queue_memory_base_dma_handle,
+ GFP_KERNEL);
+
+ if (!ctrl_info->admin_queue_memory_base)
+ return -ENOMEM;
+
+ ctrl_info->admin_queue_memory_length = alloc_length;
+
+ admin_queues = &ctrl_info->admin_queues;
+ admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
+ PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
+ admin_queues->iq_element_array =
+ &admin_queues_aligned->iq_element_array;
+ admin_queues->oq_element_array =
+ &admin_queues_aligned->oq_element_array;
+ admin_queues->iq_ci = &admin_queues_aligned->iq_ci;
+ admin_queues->oq_pi = &admin_queues_aligned->oq_pi;
+
+ admin_queues->iq_element_array_bus_addr =
+ ctrl_info->admin_queue_memory_base_dma_handle +
+ (admin_queues->iq_element_array -
+ ctrl_info->admin_queue_memory_base);
+ admin_queues->oq_element_array_bus_addr =
+ ctrl_info->admin_queue_memory_base_dma_handle +
+ (admin_queues->oq_element_array -
+ ctrl_info->admin_queue_memory_base);
+ admin_queues->iq_ci_bus_addr =
+ ctrl_info->admin_queue_memory_base_dma_handle +
+ ((void *)admin_queues->iq_ci -
+ ctrl_info->admin_queue_memory_base);
+ admin_queues->oq_pi_bus_addr =
+ ctrl_info->admin_queue_memory_base_dma_handle +
+ ((void *)admin_queues->oq_pi -
+ ctrl_info->admin_queue_memory_base);
+
+ return 0;
+}
+
+#define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES HZ
+#define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS 1
+
+static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
+{
+ struct pqi_device_registers __iomem *pqi_registers;
+ struct pqi_admin_queues *admin_queues;
+ unsigned long timeout;
+ u8 status;
+ u32 reg;
+
+ pqi_registers = ctrl_info->pqi_registers;
+ admin_queues = &ctrl_info->admin_queues;
+
+ writeq((u64)admin_queues->iq_element_array_bus_addr,
+ &pqi_registers->admin_iq_element_array_addr);
+ writeq((u64)admin_queues->oq_element_array_bus_addr,
+ &pqi_registers->admin_oq_element_array_addr);
+ writeq((u64)admin_queues->iq_ci_bus_addr,
+ &pqi_registers->admin_iq_ci_addr);
+ writeq((u64)admin_queues->oq_pi_bus_addr,
+ &pqi_registers->admin_oq_pi_addr);
+
+ reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
+ (PQI_ADMIN_OQ_NUM_ELEMENTS) << 8 |
+ (admin_queues->int_msg_num << 16);
+ writel(reg, &pqi_registers->admin_iq_num_elements);
+ writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
+ &pqi_registers->function_and_status_code);
+
+ timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
+ while (1) {
+ status = readb(&pqi_registers->function_and_status_code);
+ if (status == PQI_STATUS_IDLE)
+ break;
+ if (time_after(jiffies, timeout))
+ return -ETIMEDOUT;
+ msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
+ }
+
+ /*
+ * The offset registers are not initialized to the correct
+ * offsets until *after* the create admin queue pair command
+ * completes successfully.
+ */
+ admin_queues->iq_pi = ctrl_info->iomem_base +
+ PQI_DEVICE_REGISTERS_OFFSET +
+ readq(&pqi_registers->admin_iq_pi_offset);
+ admin_queues->oq_ci = ctrl_info->iomem_base +
+ PQI_DEVICE_REGISTERS_OFFSET +
+ readq(&pqi_registers->admin_oq_ci_offset);
+
+ return 0;
+}
+
+static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_general_admin_request *request)
+{
+ struct pqi_admin_queues *admin_queues;
+ void *next_element;
+ pqi_index_t iq_pi;
+
+ admin_queues = &ctrl_info->admin_queues;
+ iq_pi = admin_queues->iq_pi_copy;
+
+ next_element = admin_queues->iq_element_array +
+ (iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
+
+ memcpy(next_element, request, sizeof(*request));
+
+ iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
+ admin_queues->iq_pi_copy = iq_pi;
+
+ /*
+ * This write notifies the controller that an IU is available to be
+ * processed.
+ */
+ writel(iq_pi, admin_queues->iq_pi);
+}
+
+static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_general_admin_response *response)
+{
+ struct pqi_admin_queues *admin_queues;
+ pqi_index_t oq_pi;
+ pqi_index_t oq_ci;
+ unsigned long timeout;
+
+ admin_queues = &ctrl_info->admin_queues;
+ oq_ci = admin_queues->oq_ci_copy;
+
+ timeout = (3 * HZ) + jiffies;
+
+ while (1) {
+ oq_pi = *admin_queues->oq_pi;
+ if (oq_pi != oq_ci)
+ break;
+ if (time_after(jiffies, timeout)) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "timed out waiting for admin response\n");
+ return -ETIMEDOUT;
+ }
+ usleep_range(1000, 2000);
+ }
+
+ memcpy(response, admin_queues->oq_element_array +
+ (oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
+
+ oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
+ admin_queues->oq_ci_copy = oq_ci;
+ writel(oq_ci, admin_queues->oq_ci);
+
+ return 0;
+}
+
+static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_queue_group *queue_group, enum pqi_io_path path,
+ struct pqi_io_request *io_request)
+{
+ struct pqi_io_request *next;
+ void *next_element;
+ pqi_index_t iq_pi;
+ pqi_index_t iq_ci;
+ size_t iu_length;
+ unsigned long flags;
+ unsigned int num_elements_needed;
+ unsigned int num_elements_to_end_of_queue;
+ size_t copy_count;
+ struct pqi_iu_header *request;
+
+ spin_lock_irqsave(&queue_group->submit_lock[path], flags);
+
+ if (io_request)
+ list_add_tail(&io_request->request_list_entry,
+ &queue_group->request_list[path]);
+
+ iq_pi = queue_group->iq_pi_copy[path];
+
+ list_for_each_entry_safe(io_request, next,
+ &queue_group->request_list[path], request_list_entry) {
+
+ request = io_request->iu;
+
+ iu_length = get_unaligned_le16(&request->iu_length) +
+ PQI_REQUEST_HEADER_LENGTH;
+ num_elements_needed =
+ DIV_ROUND_UP(iu_length,
+ PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
+
+ iq_ci = *queue_group->iq_ci[path];
+
+ if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
+ ctrl_info->num_elements_per_iq))
+ break;
+
+ put_unaligned_le16(queue_group->oq_id,
+ &request->response_queue_id);
+
+ next_element = queue_group->iq_element_array[path] +
+ (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
+
+ num_elements_to_end_of_queue =
+ ctrl_info->num_elements_per_iq - iq_pi;
+
+ if (num_elements_needed <= num_elements_to_end_of_queue) {
+ memcpy(next_element, request, iu_length);
+ } else {
+ copy_count = num_elements_to_end_of_queue *
+ PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
+ memcpy(next_element, request, copy_count);
+ memcpy(queue_group->iq_element_array[path],
+ (u8 *)request + copy_count,
+ iu_length - copy_count);
+ }
+
+ iq_pi = (iq_pi + num_elements_needed) %
+ ctrl_info->num_elements_per_iq;
+
+ if (num_elements_needed > 1)
+ atomic_inc(&pqi_statistics.num_spans[path]);
+ atomic_inc(&pqi_statistics.num_requests[path]);
+ atomic_inc(&pqi_statistics.num_outstanding_requests[path]);
+
+ list_del(&io_request->request_list_entry);
+ }
+
+ if (iq_pi != queue_group->iq_pi_copy[path]) {
+ queue_group->iq_pi_copy[path] = iq_pi;
+ /*
+ * This write notifies the controller that one or more IUs are
+ * available to be processed.
+ */
+ writel(iq_pi, queue_group->iq_pi[path]);
+ }
+
+ spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
+}
+
+static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
+ void *context)
+{
+ struct completion *waiting = context;
+
+ complete(waiting);
+}
+
+static int pqi_submit_raid_request_synchronous_with_io_request(
+ struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
+ unsigned long timeout_msecs)
+{
+ int rc = 0;
+ DECLARE_COMPLETION_ONSTACK(wait);
+
+ io_request->io_complete_callback = pqi_raid_synchronous_complete;
+ io_request->context = &wait;
+
+ pqi_start_io(ctrl_info,
+ &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
+ io_request);
+
+ if (timeout_msecs == NO_TIMEOUT) {
+ wait_for_completion_io(&wait);
+ } else {
+ if (!wait_for_completion_io_timeout(&wait,
+ msecs_to_jiffies(timeout_msecs))) {
+ dev_warn(&ctrl_info->pci_dev->dev,
+ "command timed out\n");
+ rc = -ETIMEDOUT;
+ }
+ }
+
+ return rc;
+}
+
+static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_iu_header *request, unsigned int flags,
+ struct pqi_raid_error_info *error_info, unsigned long timeout_msecs)
+{
+ int rc;
+ struct pqi_io_request *io_request;
+ unsigned long start_jiffies;
+ unsigned long msecs_blocked;
+ size_t iu_length;
+
+ /*
+ * Note that specifying PQI_SYNC_FLAGS_INTERRUPTABLE and a timeout value
+ * are mutually exclusive.
+ */
+
+ if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
+ if (down_interruptible(&ctrl_info->sync_request_sem))
+ return -ERESTARTSYS;
+ } else {
+ if (timeout_msecs == NO_TIMEOUT) {
+ down(&ctrl_info->sync_request_sem);
+ } else {
+ start_jiffies = jiffies;
+ if (down_timeout(&ctrl_info->sync_request_sem,
+ msecs_to_jiffies(timeout_msecs)))
+ return -ETIMEDOUT;
+ msecs_blocked =
+ jiffies_to_msecs(jiffies - start_jiffies);
+ if (msecs_blocked >= timeout_msecs)
+ return -ETIMEDOUT;
+ timeout_msecs -= msecs_blocked;
+ }
+ }
+
+ io_request = pqi_alloc_io_request(ctrl_info);
+
+ put_unaligned_le16(io_request->index,
+ &(((struct pqi_raid_path_request *)request)->request_id));
+
+ if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
+ ((struct pqi_raid_path_request *)request)->error_index =
+ ((struct pqi_raid_path_request *)request)->request_id;
+
+ iu_length = get_unaligned_le16(&request->iu_length) +
+ PQI_REQUEST_HEADER_LENGTH;
+ memcpy(io_request->iu, request, iu_length);
+
+ rc = pqi_submit_raid_request_synchronous_with_io_request(ctrl_info,
+ io_request, timeout_msecs);
+
+ if (error_info) {
+ if (io_request->error_info)
+ memcpy(error_info, io_request->error_info,
+ sizeof(*error_info));
+ else
+ memset(error_info, 0, sizeof(*error_info));
+ } else if (rc == 0 && io_request->error_info) {
+ u8 scsi_status;
+ struct pqi_raid_error_info *raid_error_info;
+
+ raid_error_info = io_request->error_info;
+ scsi_status = raid_error_info->status;
+
+ if (scsi_status == SAM_STAT_CHECK_CONDITION &&
+ raid_error_info->data_out_result ==
+ PQI_DATA_IN_OUT_UNDERFLOW)
+ scsi_status = SAM_STAT_GOOD;
+
+ if (scsi_status != SAM_STAT_GOOD)
+ rc = -EIO;
+ }
+
+ pqi_free_io_request(io_request);
+
+ up(&ctrl_info->sync_request_sem);
+
+ return rc;
+}
+
+static int pqi_validate_admin_response(
+ struct pqi_general_admin_response *response, u8 expected_function_code)
+{
+ if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
+ return -EINVAL;
+
+ if (get_unaligned_le16(&response->header.iu_length) !=
+ PQI_GENERAL_ADMIN_IU_LENGTH)
+ return -EINVAL;
+
+ if (response->function_code != expected_function_code)
+ return -EINVAL;
+
+ if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int pqi_submit_admin_request_synchronous(
+ struct pqi_ctrl_info *ctrl_info,
+ struct pqi_general_admin_request *request,
+ struct pqi_general_admin_response *response)
+{
+ int rc;
+
+ pqi_submit_admin_request(ctrl_info, request);
+
+ rc = pqi_poll_for_admin_response(ctrl_info, response);
+
+ if (rc == 0)
+ rc = pqi_validate_admin_response(response,
+ request->function_code);
+
+ return rc;
+}
+
+static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ struct pqi_general_admin_request request;
+ struct pqi_general_admin_response response;
+ struct pqi_device_capability *capability;
+ struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
+
+ capability = kmalloc(sizeof(*capability), GFP_KERNEL);
+ if (!capability)
+ return -ENOMEM;
+
+ memset(&request, 0, sizeof(request));
+
+ request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
+ put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
+ &request.header.iu_length);
+ request.function_code =
+ PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
+ put_unaligned_le32(sizeof(*capability),
+ &request.data.report_device_capability.buffer_length);
+
+ rc = pqi_map_single(ctrl_info->pci_dev,
+ &request.data.report_device_capability.sg_descriptor,
+ capability, sizeof(*capability),
+ PCI_DMA_FROMDEVICE);
+ if (rc)
+ goto out;
+
+ rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
+ &response);
+
+ pqi_pci_unmap(ctrl_info->pci_dev,
+ &request.data.report_device_capability.sg_descriptor, 1,
+ PCI_DMA_FROMDEVICE);
+
+ if (rc)
+ goto out;
+
+ if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
+ rc = -EIO;
+ goto out;
+ }
+
+ ctrl_info->max_inbound_queues =
+ get_unaligned_le16(&capability->max_inbound_queues);
+ ctrl_info->max_elements_per_iq =
+ get_unaligned_le16(&capability->max_elements_per_iq);
+ ctrl_info->max_iq_element_length =
+ get_unaligned_le16(&capability->max_iq_element_length)
+ * 16;
+ ctrl_info->max_outbound_queues =
+ get_unaligned_le16(&capability->max_outbound_queues);
+ ctrl_info->max_elements_per_oq =
+ get_unaligned_le16(&capability->max_elements_per_oq);
+ ctrl_info->max_oq_element_length =
+ get_unaligned_le16(&capability->max_oq_element_length)
+ * 16;
+
+ sop_iu_layer_descriptor =
+ &capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
+
+ ctrl_info->max_inbound_iu_length_per_firmware =
+ get_unaligned_le16(
+ &sop_iu_layer_descriptor->max_inbound_iu_length);
+ ctrl_info->inbound_spanning_supported =
+ sop_iu_layer_descriptor->inbound_spanning_supported;
+ ctrl_info->outbound_spanning_supported =
+ sop_iu_layer_descriptor->outbound_spanning_supported;
+
+out:
+ kfree(capability);
+
+ return rc;
+}
+
+static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
+{
+ if (ctrl_info->max_iq_element_length <
+ PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "max. inbound queue element length of %d is less than the required length of %d\n",
+ ctrl_info->max_iq_element_length,
+ PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
+ return -EINVAL;
+ }
+
+ if (ctrl_info->max_oq_element_length <
+ PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "max. outbound queue element length of %d is less than the required length of %d\n",
+ ctrl_info->max_oq_element_length,
+ PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
+ return -EINVAL;
+ }
+
+ if (ctrl_info->max_inbound_iu_length_per_firmware <
+ PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "max. inbound IU length of %u is less than the min. required length of %d\n",
+ ctrl_info->max_inbound_iu_length_per_firmware,
+ PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int pqi_delete_operational_queue(struct pqi_ctrl_info *ctrl_info,
+ bool inbound_queue, u16 queue_id)
+{
+ struct pqi_general_admin_request request;
+ struct pqi_general_admin_response response;
+
+ memset(&request, 0, sizeof(request));
+ request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
+ put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
+ &request.header.iu_length);
+ if (inbound_queue)
+ request.function_code =
+ PQI_GENERAL_ADMIN_FUNCTION_DELETE_IQ;
+ else
+ request.function_code =
+ PQI_GENERAL_ADMIN_FUNCTION_DELETE_OQ;
+ put_unaligned_le16(queue_id,
+ &request.data.delete_operational_queue.queue_id);
+
+ return pqi_submit_admin_request_synchronous(ctrl_info, &request,
+ &response);
+}
+
+static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ struct pqi_event_queue *event_queue;
+ struct pqi_general_admin_request request;
+ struct pqi_general_admin_response response;
+
+ event_queue = &ctrl_info->event_queue;
+
+ /*
+ * Create OQ (Outbound Queue - device to host queue) to dedicate
+ * to events.
+ */
+ memset(&request, 0, sizeof(request));
+ request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
+ put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
+ &request.header.iu_length);
+ request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
+ put_unaligned_le16(event_queue->oq_id,
+ &request.data.create_operational_oq.queue_id);
+ put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
+ &request.data.create_operational_oq.element_array_addr);
+ put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
+ &request.data.create_operational_oq.pi_addr);
+ put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
+ &request.data.create_operational_oq.num_elements);
+ put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
+ &request.data.create_operational_oq.element_length);
+ request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
+ put_unaligned_le16(event_queue->int_msg_num,
+ &request.data.create_operational_oq.int_msg_num);
+
+ rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
+ &response);
+ if (rc)
+ return rc;
+
+ event_queue->oq_ci = ctrl_info->iomem_base +
+ PQI_DEVICE_REGISTERS_OFFSET +
+ get_unaligned_le64(
+ &response.data.create_operational_oq.oq_ci_offset);
+
+ return 0;
+}
+
+static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info)
+{
+ unsigned int i;
+ int rc;
+ struct pqi_queue_group *queue_group;
+ struct pqi_general_admin_request request;
+ struct pqi_general_admin_response response;
+
+ i = ctrl_info->num_active_queue_groups;
+ queue_group = &ctrl_info->queue_groups[i];
+
+ /*
+ * Create IQ (Inbound Queue - host to device queue) for
+ * RAID path.
+ */
+ memset(&request, 0, sizeof(request));
+ request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
+ put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
+ &request.header.iu_length);
+ request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
+ put_unaligned_le16(queue_group->iq_id[RAID_PATH],
+ &request.data.create_operational_iq.queue_id);
+ put_unaligned_le64(
+ (u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
+ &request.data.create_operational_iq.element_array_addr);
+ put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
+ &request.data.create_operational_iq.ci_addr);
+ put_unaligned_le16(ctrl_info->num_elements_per_iq,
+ &request.data.create_operational_iq.num_elements);
+ put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
+ &request.data.create_operational_iq.element_length);
+ request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
+
+ rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
+ &response);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error creating inbound RAID queue\n");
+ return rc;
+ }
+
+ queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
+ PQI_DEVICE_REGISTERS_OFFSET +
+ get_unaligned_le64(
+ &response.data.create_operational_iq.iq_pi_offset);
+
+ /*
+ * Create IQ (Inbound Queue - host to device queue) for
+ * Advanced I/O (AIO) path.
+ */
+ memset(&request, 0, sizeof(request));
+ request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
+ put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
+ &request.header.iu_length);
+ request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
+ put_unaligned_le16(queue_group->iq_id[AIO_PATH],
+ &request.data.create_operational_iq.queue_id);
+ put_unaligned_le64((u64)queue_group->
+ iq_element_array_bus_addr[AIO_PATH],
+ &request.data.create_operational_iq.element_array_addr);
+ put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
+ &request.data.create_operational_iq.ci_addr);
+ put_unaligned_le16(ctrl_info->num_elements_per_iq,
+ &request.data.create_operational_iq.num_elements);
+ put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
+ &request.data.create_operational_iq.element_length);
+ request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
+
+ rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
+ &response);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error creating inbound AIO queue\n");
+ goto delete_inbound_queue_raid;
+ }
+
+ queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
+ PQI_DEVICE_REGISTERS_OFFSET +
+ get_unaligned_le64(
+ &response.data.create_operational_iq.iq_pi_offset);
+
+ /*
+ * Designate the 2nd IQ as the AIO path. By default, all IQs are
+ * assumed to be for RAID path I/O unless we change the queue's
+ * property.
+ */
+ memset(&request, 0, sizeof(request));
+ request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
+ put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
+ &request.header.iu_length);
+ request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
+ put_unaligned_le16(queue_group->iq_id[AIO_PATH],
+ &request.data.change_operational_iq_properties.queue_id);
+ put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
+ &request.data.change_operational_iq_properties.vendor_specific);
+
+ rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
+ &response);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error changing queue property\n");
+ goto delete_inbound_queue_aio;
+ }
+
+ /*
+ * Create OQ (Outbound Queue - device to host queue).
+ */
+ memset(&request, 0, sizeof(request));
+ request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
+ put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
+ &request.header.iu_length);
+ request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
+ put_unaligned_le16(queue_group->oq_id,
+ &request.data.create_operational_oq.queue_id);
+ put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
+ &request.data.create_operational_oq.element_array_addr);
+ put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
+ &request.data.create_operational_oq.pi_addr);
+ put_unaligned_le16(ctrl_info->num_elements_per_oq,
+ &request.data.create_operational_oq.num_elements);
+ put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
+ &request.data.create_operational_oq.element_length);
+ request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
+ put_unaligned_le16(queue_group->int_msg_num,
+ &request.data.create_operational_oq.int_msg_num);
+
+ rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
+ &response);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error creating outbound queue\n");
+ goto delete_inbound_queue_aio;
+ }
+
+ queue_group->oq_ci = ctrl_info->iomem_base +
+ PQI_DEVICE_REGISTERS_OFFSET +
+ get_unaligned_le64(
+ &response.data.create_operational_oq.oq_ci_offset);
+
+ ctrl_info->num_active_queue_groups++;
+
+ return 0;
+
+delete_inbound_queue_aio:
+ pqi_delete_operational_queue(ctrl_info, true,
+ queue_group->iq_id[AIO_PATH]);
+
+delete_inbound_queue_raid:
+ pqi_delete_operational_queue(ctrl_info, true,
+ queue_group->iq_id[RAID_PATH]);
+
+ return rc;
+}
+
+static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ unsigned int i;
+
+ rc = pqi_create_event_queue(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error creating event queue\n");
+ return rc;
+ }
+
+ for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+ rc = pqi_create_queue_group(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error creating queue group number %u/%u\n",
+ i, ctrl_info->num_queue_groups);
+ return rc;
+ }
+ }
+
+ return 0;
+}
+
+#define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH \
+ (offsetof(struct pqi_event_config, descriptors) + \
+ (PQI_MAX_EVENT_DESCRIPTORS * sizeof(struct pqi_event_descriptor)))
+
+static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ unsigned int i;
+ struct pqi_event_config *event_config;
+ struct pqi_general_management_request request;
+
+ event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
+ GFP_KERNEL);
+ if (!event_config)
+ return -ENOMEM;
+
+ memset(&request, 0, sizeof(request));
+
+ request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
+ put_unaligned_le16(offsetof(struct pqi_general_management_request,
+ data.report_event_configuration.sg_descriptors[1]) -
+ PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
+ put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
+ &request.data.report_event_configuration.buffer_length);
+
+ rc = pqi_map_single(ctrl_info->pci_dev,
+ request.data.report_event_configuration.sg_descriptors,
+ event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
+ PCI_DMA_FROMDEVICE);
+ if (rc)
+ goto out;
+
+ rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
+ 0, NULL, NO_TIMEOUT);
+
+ pqi_pci_unmap(ctrl_info->pci_dev,
+ request.data.report_event_configuration.sg_descriptors, 1,
+ PCI_DMA_FROMDEVICE);
+
+ if (rc)
+ goto out;
+
+ for (i = 0; i < event_config->num_event_descriptors; i++)
+ put_unaligned_le16(ctrl_info->event_queue.oq_id,
+ &event_config->descriptors[i].oq_id);
+
+ memset(&request, 0, sizeof(request));
+
+ request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
+ put_unaligned_le16(offsetof(struct pqi_general_management_request,
+ data.report_event_configuration.sg_descriptors[1]) -
+ PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
+ put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
+ &request.data.report_event_configuration.buffer_length);
+
+ rc = pqi_map_single(ctrl_info->pci_dev,
+ request.data.report_event_configuration.sg_descriptors,
+ event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
+ PCI_DMA_TODEVICE);
+ if (rc)
+ goto out;
+
+ rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
+ NULL, NO_TIMEOUT);
+
+ pqi_pci_unmap(ctrl_info->pci_dev,
+ request.data.report_event_configuration.sg_descriptors, 1,
+ PCI_DMA_TODEVICE);
+
+out:
+ kfree(event_config);
+
+ return rc;
+}
+
+static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
+{
+ unsigned int i;
+ struct device *dev;
+ size_t sg_chain_buffer_length;
+ struct pqi_io_request *io_request;
+
+ if (!ctrl_info->io_request_pool)
+ return;
+
+ dev = &ctrl_info->pci_dev->dev;
+ sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
+ io_request = ctrl_info->io_request_pool;
+
+ for (i = 0; i < ctrl_info->max_io_slots; i++) {
+ kfree(io_request->iu);
+ if (!io_request->sg_chain_buffer)
+ break;
+ dma_free_coherent(dev, sg_chain_buffer_length,
+ io_request->sg_chain_buffer,
+ io_request->sg_chain_buffer_dma_handle);
+ io_request++;
+ }
+
+ kfree(ctrl_info->io_request_pool);
+ ctrl_info->io_request_pool = NULL;
+}
+
+static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
+{
+ ctrl_info->error_buffer = dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
+ ctrl_info->error_buffer_length,
+ &ctrl_info->error_buffer_dma_handle, GFP_KERNEL);
+
+ if (!ctrl_info->error_buffer)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
+{
+ unsigned int i;
+ void *sg_chain_buffer;
+ size_t sg_chain_buffer_length;
+ dma_addr_t sg_chain_buffer_dma_handle;
+ struct device *dev;
+ struct pqi_io_request *io_request;
+
+ ctrl_info->io_request_pool = kzalloc(ctrl_info->max_io_slots *
+ sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
+
+ if (!ctrl_info->io_request_pool) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "failed to allocate I/O request pool\n");
+ goto error;
+ }
+
+ dev = &ctrl_info->pci_dev->dev;
+ sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
+ io_request = ctrl_info->io_request_pool;
+
+ for (i = 0; i < ctrl_info->max_io_slots; i++) {
+ io_request->iu =
+ kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
+
+ if (!io_request->iu) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "failed to allocate IU buffers\n");
+ goto error;
+ }
+
+ sg_chain_buffer = dma_alloc_coherent(dev,
+ sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
+ GFP_KERNEL);
+
+ if (!sg_chain_buffer) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "failed to allocate PQI scatter-gather chain buffers\n");
+ goto error;
+ }
+
+ io_request->index = i;
+ io_request->sg_chain_buffer = sg_chain_buffer;
+ io_request->sg_chain_buffer_dma_handle =
+ sg_chain_buffer_dma_handle;
+ io_request++;
+ }
+
+ return 0;
+
+error:
+ pqi_free_all_io_requests(ctrl_info);
+
+ return -ENOMEM;
+}
+
+/*
+ * Calculate required resources that are sized based on max. outstanding
+ * requests and max. transfer size.
+ */
+
+static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
+{
+ u32 max_transfer_size;
+ u32 max_sg_entries;
+
+ ctrl_info->scsi_ml_can_queue =
+ ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
+ ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
+
+ ctrl_info->error_buffer_length =
+ ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
+
+ max_transfer_size =
+ min(ctrl_info->max_transfer_size, PQI_MAX_TRANSFER_SIZE);
+
+ max_sg_entries = max_transfer_size / PAGE_SIZE;
+
+ /* +1 to cover when the buffer is not page-aligned. */
+ max_sg_entries++;
+
+ max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
+
+ max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
+
+ ctrl_info->sg_chain_buffer_length =
+ max_sg_entries * sizeof(struct pqi_sg_descriptor);
+ ctrl_info->sg_tablesize = max_sg_entries;
+ ctrl_info->max_sectors = max_transfer_size / 512;
+}
+
+static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
+{
+ int num_cpus;
+ int max_queue_groups;
+ int num_queue_groups;
+ u16 num_elements_per_iq;
+ u16 num_elements_per_oq;
+
+ max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
+ ctrl_info->max_outbound_queues - 1);
+ max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
+
+ num_cpus = num_online_cpus();
+ num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
+ num_queue_groups = min(num_queue_groups, max_queue_groups);
+
+ ctrl_info->num_queue_groups = num_queue_groups;
+
+ if (ctrl_info->max_inbound_iu_length_per_firmware == 256 &&
+ ctrl_info->outbound_spanning_supported) {
+ /*
+ * TEMPHACK
+ * This is older f/w that doesn't actually support spanning.
+ */
+ ctrl_info->max_inbound_iu_length =
+ PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
+ } else {
+ /*
+ * Make sure that the max. inbound IU length is an even multiple
+ * of our inbound element length.
+ */
+ ctrl_info->max_inbound_iu_length =
+ (ctrl_info->max_inbound_iu_length_per_firmware /
+ PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
+ PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
+ }
+
+ num_elements_per_iq =
+ (ctrl_info->max_inbound_iu_length /
+ PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
+
+ /* Add one because one element in each queue is unusable. */
+ num_elements_per_iq++;
+
+ num_elements_per_iq = min(num_elements_per_iq,
+ ctrl_info->max_elements_per_iq);
+
+ num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
+ num_elements_per_oq = min(num_elements_per_oq,
+ ctrl_info->max_elements_per_oq);
+
+ ctrl_info->num_elements_per_iq = num_elements_per_iq;
+ ctrl_info->num_elements_per_oq = num_elements_per_oq;
+
+ ctrl_info->max_sg_per_iu =
+ ((ctrl_info->max_inbound_iu_length -
+ PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
+ sizeof(struct pqi_sg_descriptor)) +
+ PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
+}
+
+static inline void pqi_set_sg_descriptor(
+ struct pqi_sg_descriptor *sg_descriptor, struct scatterlist *sg)
+{
+ u64 address = (u64)sg_dma_address(sg);
+ unsigned int length = sg_dma_len(sg);
+
+ put_unaligned_le64(address, &sg_descriptor->address);
+ put_unaligned_le32(length, &sg_descriptor->length);
+ put_unaligned_le32(0, &sg_descriptor->flags);
+}
+
+static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
+ struct pqi_io_request *io_request)
+{
+ int i;
+ u16 iu_length;
+ int sg_count;
+ bool chained;
+ unsigned int num_sg_in_iu;
+ unsigned int max_sg_per_iu;
+ struct scatterlist *sg;
+ struct pqi_sg_descriptor *sg_descriptor;
+
+ sg_count = scsi_dma_map(scmd);
+ if (sg_count < 0)
+ return sg_count;
+
+ iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
+ PQI_REQUEST_HEADER_LENGTH;
+
+ if (sg_count == 0)
+ goto out;
+
+ sg = scsi_sglist(scmd);
+ sg_descriptor = request->sg_descriptors;
+ max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
+ chained = false;
+ num_sg_in_iu = 0;
+ i = 0;
+
+ while (1) {
+ pqi_set_sg_descriptor(sg_descriptor, sg);
+ if (!chained)
+ num_sg_in_iu++;
+ i++;
+ if (i == sg_count)
+ break;
+ sg_descriptor++;
+ if (i == max_sg_per_iu) {
+ put_unaligned_le64(
+ (u64)io_request->sg_chain_buffer_dma_handle,
+ &sg_descriptor->address);
+ put_unaligned_le32((sg_count - num_sg_in_iu)
+ * sizeof(*sg_descriptor),
+ &sg_descriptor->length);
+ put_unaligned_le32(CISS_SG_CHAIN,
+ &sg_descriptor->flags);
+ chained = true;
+ num_sg_in_iu++;
+ sg_descriptor = io_request->sg_chain_buffer;
+ }
+ sg = sg_next(sg);
+ }
+
+ put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
+ request->partial = chained;
+ iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
+
+out:
+ put_unaligned_le16(iu_length, &request->header.iu_length);
+
+ return 0;
+}
+
+static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
+ struct pqi_io_request *io_request)
+{
+ int i;
+ u16 iu_length;
+ int sg_count;
+ unsigned int num_sg_in_iu = 0;
+ struct scatterlist *sg;
+ struct pqi_sg_descriptor *sg_descriptor;
+
+ sg_count = scsi_dma_map(scmd);
+ if (sg_count < 0)
+ return sg_count;
+ if (sg_count == 0)
+ goto out;
+
+ if (sg_count <= ctrl_info->max_sg_per_iu) {
+ sg_descriptor = &request->sg_descriptors[0];
+ scsi_for_each_sg(scmd, sg, sg_count, i) {
+ pqi_set_sg_descriptor(sg_descriptor, sg);
+ sg_descriptor++;
+ }
+ put_unaligned_le32(CISS_SG_LAST,
+ &request->sg_descriptors[sg_count - 1].flags);
+ num_sg_in_iu = sg_count;
+ } else {
+ sg_descriptor = &request->sg_descriptors[0];
+ put_unaligned_le64((u64)io_request->sg_chain_buffer_dma_handle,
+ &sg_descriptor->address);
+ put_unaligned_le32(sg_count * sizeof(*sg_descriptor),
+ &sg_descriptor->length);
+ put_unaligned_le32(CISS_SG_CHAIN, &sg_descriptor->flags);
+
+ sg_descriptor = io_request->sg_chain_buffer;
+ scsi_for_each_sg(scmd, sg, sg_count, i) {
+ pqi_set_sg_descriptor(sg_descriptor, sg);
+ sg_descriptor++;
+ }
+ put_unaligned_le32(CISS_SG_LAST,
+ &io_request->sg_chain_buffer[sg_count - 1].flags);
+ num_sg_in_iu = 1;
+ request->partial = 1;
+ }
+
+out:
+ iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
+ PQI_REQUEST_HEADER_LENGTH;
+ iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
+ put_unaligned_le16(iu_length, &request->header.iu_length);
+ request->num_sg_descriptors = num_sg_in_iu;
+
+ return 0;
+}
+
+static void pqi_raid_io_complete(struct pqi_io_request *io_request,
+ void *context)
+{
+ struct scsi_cmnd *scmd;
+
+ scmd = io_request->scmd;
+ pqi_free_io_request(io_request);
+ scsi_dma_unmap(scmd);
+ pqi_scsi_done(scmd);
+}
+
+static int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device, struct scsi_cmnd *scmd,
+ struct pqi_queue_group *queue_group)
+{
+ int rc;
+ size_t cdb_length;
+ struct pqi_io_request *io_request;
+ struct pqi_raid_path_request *request;
+
+ io_request = pqi_alloc_io_request(ctrl_info);
+ io_request->io_complete_callback = pqi_raid_io_complete;
+ io_request->scmd = scmd;
+
+ scmd->host_scribble = (unsigned char *)io_request;
+
+ request = io_request->iu;
+ memset(request, 0,
+ offsetof(struct pqi_raid_path_request, sg_descriptors));
+
+ request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
+ put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
+ request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
+ put_unaligned_le16(io_request->index, &request->request_id);
+ request->error_index = request->request_id;
+ memcpy(request->lun_number, device->scsi3addr,
+ sizeof(request->lun_number));
+
+ cdb_length = scmd->cmd_len;
+ memcpy(request->cdb, scmd->cmnd, cdb_length);
+
+ switch (cdb_length) {
+ case 6:
+ case 10:
+ case 12:
+ case 16:
+ /* No bytes in the Additional CDB bytes field */
+ request->additional_cdb_bytes_usage =
+ SOP_ADDITIONAL_CDB_BYTES_0;
+ break;
+ case 20:
+ /* 4 bytes in the Additional cdb field */
+ request->additional_cdb_bytes_usage =
+ SOP_ADDITIONAL_CDB_BYTES_4;
+ break;
+ case 24:
+ /* 8 bytes in the Additional cdb field */
+ request->additional_cdb_bytes_usage =
+ SOP_ADDITIONAL_CDB_BYTES_8;
+ break;
+ case 28:
+ /* 12 bytes in the Additional cdb field */
+ request->additional_cdb_bytes_usage =
+ SOP_ADDITIONAL_CDB_BYTES_12;
+ break;
+ case 32:
+ default:
+ /* 16 bytes in the Additional cdb field */
+ request->additional_cdb_bytes_usage =
+ SOP_ADDITIONAL_CDB_BYTES_16;
+ break;
+ }
+
+ switch (scmd->sc_data_direction) {
+ case DMA_TO_DEVICE:
+ request->data_direction = SOP_READ_FLAG;
+ break;
+ case DMA_FROM_DEVICE:
+ request->data_direction = SOP_WRITE_FLAG;
+ break;
+ case DMA_NONE:
+ request->data_direction = SOP_NO_DIRECTION_FLAG;
+ break;
+ case DMA_BIDIRECTIONAL:
+ request->data_direction = SOP_BIDIRECTIONAL;
+ break;
+ default:
+ dev_err(&ctrl_info->pci_dev->dev,
+ "unknown data direction: %d\n",
+ scmd->sc_data_direction);
+ WARN_ON(scmd->sc_data_direction);
+ break;
+ }
+
+ rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
+ if (rc) {
+ pqi_free_io_request(io_request);
+ return SCSI_MLQUEUE_HOST_BUSY;
+ }
+
+ pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
+
+ return 0;
+}
+
+static void pqi_aio_io_complete(struct pqi_io_request *io_request,
+ void *context)
+{
+ struct scsi_cmnd *scmd;
+
+ scmd = io_request->scmd;
+ scsi_dma_unmap(scmd);
+ if (io_request->status == -EAGAIN)
+ set_host_byte(scmd, DID_IMM_RETRY);
+ pqi_free_io_request(io_request);
+ pqi_scsi_done(scmd);
+}
+
+static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device, struct scsi_cmnd *scmd,
+ struct pqi_queue_group *queue_group)
+{
+ return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
+ scmd->cmnd, scmd->cmd_len, queue_group, NULL);
+}
+
+static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
+ struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
+ unsigned int cdb_length, struct pqi_queue_group *queue_group,
+ struct pqi_encryption_info *encryption_info)
+{
+ int rc;
+ struct pqi_io_request *io_request;
+ struct pqi_aio_path_request *request;
+
+ io_request = pqi_alloc_io_request(ctrl_info);
+ io_request->io_complete_callback = pqi_aio_io_complete;
+ io_request->scmd = scmd;
+
+ scmd->host_scribble = (unsigned char *)io_request;
+
+ request = io_request->iu;
+ memset(request, 0,
+ offsetof(struct pqi_raid_path_request, sg_descriptors));
+
+ request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
+ put_unaligned_le32(aio_handle, &request->nexus_id);
+ put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
+ request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
+ put_unaligned_le16(io_request->index, &request->request_id);
+ request->error_index = request->request_id;
+ request->cdb_length = cdb_length;
+ memcpy(request->cdb, cdb, cdb_length);
+
+ switch (scmd->sc_data_direction) {
+ case DMA_TO_DEVICE:
+ request->data_direction = SOP_READ_FLAG;
+ break;
+ case DMA_FROM_DEVICE:
+ request->data_direction = SOP_WRITE_FLAG;
+ break;
+ case DMA_NONE:
+ request->data_direction = SOP_NO_DIRECTION_FLAG;
+ break;
+ case DMA_BIDIRECTIONAL:
+ request->data_direction = SOP_BIDIRECTIONAL;
+ break;
+ default:
+ dev_err(&ctrl_info->pci_dev->dev,
+ "unknown data direction: %d\n",
+ scmd->sc_data_direction);
+ WARN_ON(scmd->sc_data_direction);
+ break;
+ }
+
+ if (encryption_info) {
+ request->encryption_enable = true;
+ put_unaligned_le16(encryption_info->data_encryption_key_index,
+ &request->data_encryption_key_index);
+ put_unaligned_le32(encryption_info->encrypt_tweak_lower,
+ &request->encrypt_tweak_lower);
+ put_unaligned_le32(encryption_info->encrypt_tweak_upper,
+ &request->encrypt_tweak_upper);
+ }
+
+ rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
+ if (rc) {
+ pqi_free_io_request(io_request);
+ return SCSI_MLQUEUE_HOST_BUSY;
+ }
+
+ pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
+
+ return 0;
+}
+
+static int pqi_scsi_queue_command(struct Scsi_Host *shost,
+ struct scsi_cmnd *scmd)
+{
+ int rc;
+ struct pqi_ctrl_info *ctrl_info;
+ struct pqi_scsi_dev_t *device;
+ u16 hwq;
+ struct pqi_queue_group *queue_group;
+ bool raid_bypassed;
+
+ device = scmd->device->hostdata;
+ if (!device) {
+ set_host_byte(scmd, DID_NO_CONNECT);
+ pqi_scsi_done(scmd);
+ return 0;
+ }
+
+ if (device->reset_in_progress) {
+ set_host_byte(scmd, DID_RESET);
+ pqi_scsi_done(scmd);
+ return 0;
+ }
+
+ ctrl_info = shost_to_hba(shost);
+
+ if (pqi_ctrl_offline(ctrl_info)) {
+ set_host_byte(scmd, DID_NO_CONNECT);
+ pqi_scsi_done(scmd);
+ return 0;
+ }
+
+ hwq = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scmd->request));
+ if (hwq >= ctrl_info->num_queue_groups)
+ hwq = 0;
+
+ queue_group = &ctrl_info->queue_groups[hwq];
+
+ if (pqi_is_logical_device(device)) {
+ raid_bypassed = false;
+ if (device->offload_enabled &&
+ scmd->request->cmd_type == REQ_TYPE_FS) {
+ rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device,
+ scmd, queue_group);
+ if (rc == 0 ||
+ rc == SCSI_MLQUEUE_HOST_BUSY ||
+ rc == SAM_STAT_CHECK_CONDITION ||
+ rc == SAM_STAT_RESERVATION_CONFLICT) {
+ raid_bypassed = true;
+ if (rc == 0)
+ atomic_inc(
+ &pqi_statistics.num_raid_bypasses);
+ }
+ }
+ if (!raid_bypassed)
+ rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
+ queue_group);
+ } else {
+ if (device->aio_enabled)
+ rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd,
+ queue_group);
+ else
+ rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
+ queue_group);
+ }
+
+ return rc;
+}
+
+static void pqi_complete_queued_requests(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device_in_reset)
+{
+ unsigned int i;
+ unsigned int path;
+ struct pqi_queue_group *queue_group;
+ unsigned long flags;
+ struct pqi_io_request *io_request;
+ struct pqi_io_request *next;
+ struct scsi_cmnd *scmd;
+ struct pqi_scsi_dev_t *device;
+
+ for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+ queue_group = &ctrl_info->queue_groups[i];
+
+ for (path = 0; path < 2; path++) {
+ spin_lock_irqsave(&queue_group->submit_lock[path],
+ flags);
+
+ list_for_each_entry_safe(io_request, next,
+ &queue_group->request_list[path],
+ request_list_entry) {
+ scmd = io_request->scmd;
+ if (scmd) {
+ device = scmd->device->hostdata;
+ if (device == device_in_reset) {
+ set_host_byte(scmd, DID_RESET);
+ pqi_scsi_done(scmd);
+ list_del(&io_request->
+ request_list_entry);
+ }
+ }
+ }
+
+ spin_unlock_irqrestore(&queue_group->submit_lock[path],
+ flags);
+ }
+ }
+}
+
+static void pqi_reset_lun_complete(struct pqi_io_request *io_request,
+ void *context)
+{
+ struct completion *waiting = context;
+
+ complete(waiting);
+}
+
+static int pqi_reset_lun(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device)
+{
+ int rc;
+ struct pqi_io_request *io_request;
+ DECLARE_COMPLETION_ONSTACK(wait);
+ struct pqi_task_management_request *request;
+
+ down(&ctrl_info->lun_reset_sem);
+
+ io_request = pqi_alloc_io_request(ctrl_info);
+ io_request->io_complete_callback = pqi_reset_lun_complete;
+ io_request->context = &wait;
+
+ request = io_request->iu;
+ memset(request, 0, sizeof(*request));
+
+ request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
+ put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
+ &request->header.iu_length);
+ put_unaligned_le16(io_request->index, &request->request_id);
+ memcpy(request->lun_number, device->scsi3addr,
+ sizeof(request->lun_number));
+ request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
+
+ pqi_start_io(ctrl_info,
+ &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
+ io_request);
+
+ if (!wait_for_completion_io_timeout(&wait,
+ msecs_to_jiffies(PQI_ABORT_TIMEOUT_MSECS))) {
+ rc = -ETIMEDOUT;
+ } else {
+ rc = io_request->status;
+ }
+
+ pqi_free_io_request(io_request);
+ up(&ctrl_info->lun_reset_sem);
+
+ return rc;
+}
+
+/* Performs a reset at the LUN level. */
+
+static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_t *device)
+{
+ int rc;
+
+ pqi_check_ctrl_health(ctrl_info);
+ if (pqi_ctrl_offline(ctrl_info))
+ return FAILED;
+
+ device->reset_in_progress = true;
+ pqi_complete_queued_requests(ctrl_info, device);
+ rc = pqi_reset_lun(ctrl_info, device);
+ device->reset_in_progress = false;
+
+ if (rc)
+ return FAILED;
+
+ return SUCCESS;
+}
+
+static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
+{
+ int rc;
+ struct pqi_ctrl_info *ctrl_info;
+ struct pqi_scsi_dev_t *device;
+
+ ctrl_info = shost_to_hba(scmd->device->host);
+
+ device = scmd->device->hostdata;
+ if (!device) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "target of reset has been deleted\n");
+ return FAILED;
+ }
+
+ dev_err(&ctrl_info->pci_dev->dev,
+ "resetting scsi %d:%d:%d:%d\n",
+ ctrl_info->scsi_host->host_no,
+ device->bus, device->target, device->lun);
+
+ rc = pqi_device_reset(ctrl_info, device);
+
+ dev_err(&ctrl_info->pci_dev->dev,
+ "reset of scsi %d:%d:%d:%d: %s\n",
+ ctrl_info->scsi_host->host_no,
+ device->bus, device->target, device->lun,
+ rc == SUCCESS ? "SUCCESS" : "FAILED");
+
+ return rc;
+}
+
+static int pqi_slave_alloc(struct scsi_device *sdev)
+{
+ struct pqi_scsi_dev_t *device;
+ unsigned long flags;
+ struct pqi_ctrl_info *ctrl_info;
+ struct scsi_target *starget;
+ struct sas_rphy *rphy;
+
+ ctrl_info = shost_to_hba(sdev->host);
+
+ spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+ if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
+ starget = scsi_target(sdev);
+ rphy = target_to_rphy(starget);
+ device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
+ if (device) {
+ device->target = sdev_id(sdev);
+ device->lun = sdev->lun;
+ device->target_lun_valid = true;
+ }
+ } else {
+ device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
+ sdev_id(sdev), sdev->lun);
+ }
+
+ if (device && device->expose_device) {
+ sdev->hostdata = device;
+ device->sdev = sdev;
+ if (device->queue_depth) {
+ device->advertised_queue_depth = device->queue_depth;
+ scsi_change_queue_depth(sdev,
+ device->advertised_queue_depth);
+ }
+ }
+
+ spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+ return 0;
+}
+
+static int pqi_slave_configure(struct scsi_device *sdev)
+{
+ struct pqi_scsi_dev_t *device;
+
+ device = sdev->hostdata;
+ if (!device || !device->expose_device)
+ sdev->no_uld_attach = true;
+
+ return 0;
+}
+
+static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info,
+ void __user *arg)
+{
+ struct pci_dev *pci_dev;
+ u32 subsystem_vendor;
+ u32 subsystem_device;
+ cciss_pci_info_struct pciinfo;
+
+ if (!arg)
+ return -EINVAL;
+
+ pci_dev = ctrl_info->pci_dev;
+
+ pciinfo.domain = pci_domain_nr(pci_dev->bus);
+ pciinfo.bus = pci_dev->bus->number;
+ pciinfo.dev_fn = pci_dev->devfn;
+ subsystem_vendor = pci_dev->subsystem_vendor;
+ subsystem_device = pci_dev->subsystem_device;
+ pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) |
+ subsystem_vendor;
+
+ if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int pqi_getdrivver_ioctl(void __user *arg)
+{
+ u32 version;
+
+ if (!arg)
+ return -EINVAL;
+
+ version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
+ (DRIVER_RELEASE << 16) | DRIVER_REVISION;
+
+ if (copy_to_user(arg, &version, sizeof(version)))
+ return -EFAULT;
+
+ return 0;
+}
+
+struct ciss_error_info {
+ u8 scsi_status;
+ int command_status;
+ size_t sense_data_length;
+};
+
+static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
+ struct ciss_error_info *ciss_error_info)
+{
+ int ciss_cmd_status;
+ size_t sense_data_length;
+
+ switch (pqi_error_info->data_out_result) {
+ case PQI_DATA_IN_OUT_GOOD:
+ ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
+ break;
+ case PQI_DATA_IN_OUT_UNDERFLOW:
+ ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
+ break;
+ case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
+ ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
+ break;
+ case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
+ case PQI_DATA_IN_OUT_BUFFER_ERROR:
+ case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
+ case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
+ case PQI_DATA_IN_OUT_ERROR:
+ ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
+ break;
+ case PQI_DATA_IN_OUT_HARDWARE_ERROR:
+ case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
+ case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
+ case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
+ case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
+ case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
+ case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
+ case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
+ case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
+ case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
+ ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
+ break;
+ case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
+ ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
+ break;
+ case PQI_DATA_IN_OUT_ABORTED:
+ ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
+ break;
+ case PQI_DATA_IN_OUT_TIMEOUT:
+ ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
+ break;
+ default:
+ ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
+ break;
+ }
+
+ sense_data_length =
+ get_unaligned_le16(&pqi_error_info->sense_data_length);
+ if (sense_data_length == 0)
+ sense_data_length =
+ get_unaligned_le16(&pqi_error_info->response_data_length);
+ if (sense_data_length)
+ if (sense_data_length > sizeof(pqi_error_info->data))
+ sense_data_length = sizeof(pqi_error_info->data);
+
+ ciss_error_info->scsi_status = pqi_error_info->status;
+ ciss_error_info->command_status = ciss_cmd_status;
+ ciss_error_info->sense_data_length = sense_data_length;
+}
+
+static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
+{
+ int rc;
+ char *kernel_buffer = NULL;
+ u16 iu_length;
+ size_t sense_data_length;
+ IOCTL_Command_struct iocommand;
+ struct pqi_raid_path_request request;
+ struct pqi_raid_error_info pqi_error_info;
+ struct ciss_error_info ciss_error_info;
+
+ if (pqi_ctrl_offline(ctrl_info))
+ return -ENXIO;
+ if (!arg)
+ return -EINVAL;
+ if (!capable(CAP_SYS_RAWIO))
+ return -EPERM;
+ if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
+ return -EFAULT;
+ if (iocommand.buf_size < 1 &&
+ iocommand.Request.Type.Direction != XFER_NONE)
+ return -EINVAL;
+ if (iocommand.Request.CDBLen > sizeof(request.cdb))
+ return -EINVAL;
+ if (iocommand.Request.Type.Type != TYPE_CMD)
+ return -EINVAL;
+
+ switch (iocommand.Request.Type.Direction) {
+ case XFER_NONE:
+ case XFER_WRITE:
+ case XFER_READ:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (iocommand.buf_size > 0) {
+ kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
+ if (!kernel_buffer)
+ return -ENOMEM;
+ if (iocommand.Request.Type.Direction & XFER_WRITE) {
+ if (copy_from_user(kernel_buffer, iocommand.buf,
+ iocommand.buf_size)) {
+ rc = -EFAULT;
+ goto out;
+ }
+ } else {
+ memset(kernel_buffer, 0, iocommand.buf_size);
+ }
+ }
+
+ memset(&request, 0, sizeof(request));
+
+ request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
+ iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
+ PQI_REQUEST_HEADER_LENGTH;
+ memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
+ sizeof(request.lun_number));
+ memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
+ request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
+
+ switch (iocommand.Request.Type.Direction) {
+ case XFER_NONE:
+ request.data_direction = SOP_NO_DIRECTION_FLAG;
+ break;
+ case XFER_WRITE:
+ request.data_direction = SOP_WRITE_FLAG;
+ break;
+ case XFER_READ:
+ request.data_direction = SOP_READ_FLAG;
+ break;
+ }
+
+ request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
+
+ if (iocommand.buf_size > 0) {
+ put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
+
+ rc = pqi_map_single(ctrl_info->pci_dev,
+ &request.sg_descriptors[0], kernel_buffer,
+ iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
+ if (rc)
+ goto out;
+
+ iu_length += sizeof(request.sg_descriptors[0]);
+ }
+
+ put_unaligned_le16(iu_length, &request.header.iu_length);
+
+ rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
+ PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info, NO_TIMEOUT);
+
+ if (iocommand.buf_size > 0)
+ pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
+ PCI_DMA_BIDIRECTIONAL);
+
+ memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
+
+ if (rc == 0) {
+ pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
+ iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
+ iocommand.error_info.CommandStatus =
+ ciss_error_info.command_status;
+ sense_data_length = ciss_error_info.sense_data_length;
+ if (sense_data_length) {
+ if (sense_data_length >
+ sizeof(iocommand.error_info.SenseInfo))
+ sense_data_length =
+ sizeof(iocommand.error_info.SenseInfo);
+ memcpy(iocommand.error_info.SenseInfo,
+ pqi_error_info.data, sense_data_length);
+ iocommand.error_info.SenseLen = sense_data_length;
+ }
+ }
+
+ if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
+ rc = -EFAULT;
+ goto out;
+ }
+
+ if (rc == 0 && iocommand.buf_size > 0 &&
+ (iocommand.Request.Type.Direction & XFER_READ)) {
+ if (copy_to_user(iocommand.buf, kernel_buffer,
+ iocommand.buf_size)) {
+ rc = -EFAULT;
+ }
+ }
+
+out:
+ kfree(kernel_buffer);
+
+ return rc;
+}
+
+static int pqi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
+{
+ int rc;
+ struct pqi_ctrl_info *ctrl_info;
+
+ ctrl_info = shost_to_hba(sdev->host);
+
+ switch (cmd) {
+ case CCISS_DEREGDISK:
+ case CCISS_REGNEWDISK:
+ case CCISS_REGNEWD:
+ rc = pqi_scan_scsi_devices(ctrl_info);
+ break;
+ case CCISS_GETPCIINFO:
+ rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
+ break;
+ case CCISS_GETDRIVVER:
+ rc = pqi_getdrivver_ioctl(arg);
+ break;
+ case CCISS_PASSTHRU:
+ atomic_inc(&pqi_statistics.num_passthru_ioctls);
+ rc = pqi_passthru_ioctl(ctrl_info, arg);
+ break;
+ default:
+ rc = -EINVAL;
+ break;
+ }
+
+ return rc;
+}
+
+static DEVICE_ATTR(sas_address, S_IRUGO, pqi_sas_address_show, NULL);
+static DEVICE_ATTR(ssd_smart_path_enabled, S_IRUGO,
+ pqi_ssd_smart_path_enabled_show, NULL);
+
+static struct device_attribute *pqi_sdev_attrs[] = {
+ &dev_attr_sas_address,
+ &dev_attr_ssd_smart_path_enabled,
+ NULL
+};
+
+static DEVICE_ATTR(rescan, S_IWUSR, NULL, pqi_host_store_rescan);
+static DEVICE_ATTR(stats, S_IRUGO, pqi_statistics_show, NULL);
+static DEVICE_ATTR(devices, S_IRUGO, pqi_devices_show, NULL);
+static DEVICE_ATTR(version, S_IRUGO, pqi_version_show, NULL);
+static DEVICE_ATTR(pqi, S_IRUGO, pqi_info_show, NULL);
+
+static struct device_attribute *pqi_shost_attrs[] = {
+ &dev_attr_rescan,
+ &dev_attr_stats,
+ &dev_attr_devices,
+ &dev_attr_version,
+ &dev_attr_pqi,
+ NULL
+};
+
+static int pqi_change_queue_depth(struct scsi_device *sdev, int qdepth)
+{
+ struct pqi_scsi_dev_t *device = sdev->hostdata;
+
+ if (!device)
+ return -ENODEV;
+
+ if (qdepth < 1)
+ qdepth = 1;
+ else if (qdepth > device->queue_depth)
+ qdepth = device->queue_depth;
+
+ return scsi_change_queue_depth(sdev, qdepth);
+}
+
+static struct scsi_host_template pqi_driver_template = {
+ .module = THIS_MODULE,
+ .name = DRIVER_NAME_SHORT,
+ .proc_name = DRIVER_NAME_SHORT,
+ .queuecommand = pqi_scsi_queue_command,
+ .scan_start = pqi_scan_start,
+ .scan_finished = pqi_scan_finished,
+ .change_queue_depth = pqi_change_queue_depth,
+ .this_id = -1,
+ .use_clustering = ENABLE_CLUSTERING,
+ .eh_device_reset_handler = pqi_eh_device_reset_handler,
+ .ioctl = pqi_ioctl,
+ .slave_alloc = pqi_slave_alloc,
+ .slave_configure = pqi_slave_configure,
+ .sdev_attrs = pqi_sdev_attrs,
+ .shost_attrs = pqi_shost_attrs,
+};
+
+static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ struct Scsi_Host *shost;
+
+ shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
+ if (!shost) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "scsi_host_alloc failed for controller %u\n",
+ ctrl_info->ctrl_id);
+ return -ENOMEM;
+ }
+
+ shost->io_port = 0;
+ shost->n_io_port = 0;
+ shost->this_id = -1;
+ shost->max_channel = PQI_MAX_BUS;
+ shost->max_cmd_len = MAX_COMMAND_SIZE;
+ shost->max_lun = ~0;
+ shost->max_id = ~0;
+ shost->max_sectors = ctrl_info->max_sectors;
+ shost->can_queue = ctrl_info->scsi_ml_can_queue;
+ shost->cmd_per_lun = shost->can_queue;
+ shost->sg_tablesize = ctrl_info->sg_tablesize;
+ shost->transportt = pqi_sas_transport_template;
+ shost->irq = ctrl_info->msix_vectors[0];
+ shost->unique_id = shost->irq;
+#if PQI_ENABLE_MULTI_QUEUE_SUPPORT
+ shost->nr_hw_queues = ctrl_info->num_queue_groups;
+#endif
+ shost->hostdata[0] = (unsigned long)ctrl_info;
+
+ ctrl_info->scsi_host = shost;
+
+ rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "scsi_add_host failed for controller %u\n",
+ ctrl_info->ctrl_id);
+ goto free_host;
+ }
+
+ rc = pqi_add_sas_host(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "add SAS host failed for controller %u\n",
+ ctrl_info->ctrl_id);
+ goto remove_host;
+ }
+
+ return 0;
+
+remove_host:
+ scsi_remove_host(shost);
+free_host:
+ scsi_host_put(shost);
+
+ return rc;
+}
+
+static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
+{
+ struct Scsi_Host *shost;
+
+ pqi_delete_sas_host(ctrl_info);
+
+ shost = ctrl_info->scsi_host;
+ if (!shost)
+ return;
+
+ scsi_remove_host(shost);
+ scsi_host_put(shost);
+}
+
+#define PQI_RESET_ACTION_RESET 0x1
+
+#define PQI_RESET_TYPE_NO_RESET 0x0
+#define PQI_RESET_TYPE_SOFT_RESET 0x1
+#define PQI_RESET_TYPE_FIRM_RESET 0x2
+#define PQI_RESET_TYPE_HARD_RESET 0x3
+
+static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ u32 reset_params;
+
+ reset_params = (PQI_RESET_ACTION_RESET << 5) |
+ PQI_RESET_TYPE_HARD_RESET;
+
+ writel(reset_params,
+ &ctrl_info->pqi_registers->device_reset);
+
+ rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
+ if (rc)
+ dev_err(&ctrl_info->pci_dev->dev,
+ "PQI reset failed\n");
+
+ return rc;
+}
+
+static int pqi_get_ctrl_firmware_version(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ struct bmic_identify_controller *identify;
+
+ identify = kmalloc(sizeof(*identify), GFP_KERNEL);
+ if (!identify)
+ return -ENOMEM;
+
+ rc = pqi_identify_controller(ctrl_info, identify);
+ if (rc)
+ goto out;
+
+ memcpy(ctrl_info->firmware_version, identify->firmware_version,
+ sizeof(identify->firmware_version));
+ ctrl_info->firmware_version[sizeof(identify->firmware_version)] = '\0';
+ snprintf(ctrl_info->firmware_version +
+ strlen(ctrl_info->firmware_version),
+ sizeof(ctrl_info->firmware_version),
+ "-%u", get_unaligned_le16(&identify->firmware_build_number));
+
+out:
+ kfree(identify);
+
+ return rc;
+}
+
+static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+
+ /*
+ * When the controller comes out of reset, it is always running
+ * in legacy SIS mode. This is so that it can be compatible
+ * with legacy drivers shipped with OSes. So we have to talk
+ * to it using SIS commands at first. Once we are satisified
+ * that the controller supports PQI, we transition it into PQI
+ * mode.
+ */
+
+ /*
+ * Wait until the controller is ready to start accepting SIS
+ * commands.
+ */
+ rc = sis_wait_for_ctrl_ready(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error initializing SIS interface\n");
+ return rc;
+ }
+
+ /*
+ * Get the controller properties. This allows us to determine
+ * whether or not it supports PQI mode.
+ */
+ rc = sis_get_ctrl_properties(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error obtaining controller properties\n");
+ return rc;
+ }
+
+ rc = sis_get_pqi_capabilities(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error obtaining controller capabilities\n");
+ return rc;
+ }
+
+ if (ctrl_info->max_outstanding_requests > PQI_MAX_OUTSTANDING_REQUESTS)
+ ctrl_info->max_outstanding_requests =
+ PQI_MAX_OUTSTANDING_REQUESTS;
+
+ pqi_calculate_io_resources(ctrl_info);
+
+ rc = pqi_alloc_error_buffer(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "failed to allocate PQI error buffer\n");
+ return rc;
+ }
+
+ /*
+ * If the function we are about to call succeeds, the
+ * controller will transition from legacy SIS mode
+ * into PQI mode.
+ */
+ rc = sis_init_base_struct_addr(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error initializing PQI mode\n");
+ return rc;
+ }
+
+ /* Wait for the controller to complete the SIS -> PQI transition. */
+ rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "transition to PQI mode failed\n");
+ return rc;
+ }
+
+ /* From here on, we are running in PQI mode. */
+ ctrl_info->pqi_mode_enabled = true;
+
+ rc = pqi_alloc_admin_queues(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error allocating admin queues\n");
+ return rc;
+ }
+
+ rc = pqi_create_admin_queues(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error creating admin queues\n");
+ return rc;
+ }
+
+ rc = pqi_report_device_capability(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "obtaining device capability failed\n");
+ return rc;
+ }
+
+ rc = pqi_validate_device_capability(ctrl_info);
+ if (rc)
+ return rc;
+
+ pqi_calculate_queue_resources(ctrl_info);
+
+ rc = pqi_enable_msix_interrupts(ctrl_info);
+ if (rc)
+ return rc;
+
+ if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
+ ctrl_info->max_msix_vectors =
+ ctrl_info->num_msix_vectors_enabled;
+ pqi_calculate_queue_resources(ctrl_info);
+ }
+
+ rc = pqi_alloc_io_resources(ctrl_info);
+ if (rc)
+ return rc;
+
+ rc = pqi_alloc_operational_queues(ctrl_info);
+ if (rc)
+ return rc;
+
+ pqi_init_operational_queues(ctrl_info);
+
+ rc = pqi_request_irqs(ctrl_info);
+ if (rc)
+ return rc;
+
+ pqi_irq_set_affinity_hint(ctrl_info);
+
+ rc = pqi_create_queues(ctrl_info);
+ if (rc)
+ return rc;
+
+ sis_enable_msix(ctrl_info);
+
+ rc = pqi_configure_events(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error configuring events\n");
+ return rc;
+ }
+
+ pqi_start_heartbeat_timer(ctrl_info);
+
+ ctrl_info->controller_online = true;
+
+ /* Register with the SCSI subsystem. */
+ rc = pqi_register_scsi(ctrl_info);
+ if (rc)
+ return rc;
+
+ rc = pqi_get_ctrl_firmware_version(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error obtaining firmware version\n");
+ return rc;
+ }
+
+ rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error updating host wellness\n");
+ return rc;
+ }
+
+ pqi_schedule_update_time_worker(ctrl_info);
+
+ pqi_scan_scsi_devices(ctrl_info);
+
+ return 0;
+}
+
+static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ u64 mask;
+
+ rc = pci_enable_device(ctrl_info->pci_dev);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "failed to enable PCI device\n");
+ return rc;
+ }
+
+ if (sizeof(dma_addr_t) > 4)
+ mask = DMA_BIT_MASK(64);
+ else
+ mask = DMA_BIT_MASK(32);
+
+ rc = dma_set_mask(&ctrl_info->pci_dev->dev, mask);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
+ goto disable_device;
+ }
+
+ rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "failed to obtain PCI resources\n");
+ goto disable_device;
+ }
+
+ ctrl_info->iomem_base = ioremap_nocache(pci_resource_start(
+ ctrl_info->pci_dev, 0),
+ sizeof(struct pqi_ctrl_registers));
+ if (!ctrl_info->iomem_base) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "failed to map memory for controller registers\n");
+ rc = -ENOMEM;
+ goto release_regions;
+ }
+
+ ctrl_info->registers = ctrl_info->iomem_base;
+ ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
+
+ /* Enable bus mastering. */
+ pci_set_master(ctrl_info->pci_dev);
+
+ pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
+
+ return 0;
+
+release_regions:
+ pci_release_regions(ctrl_info->pci_dev);
+disable_device:
+ pci_disable_device(ctrl_info->pci_dev);
+
+ return rc;
+}
+
+static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
+{
+ iounmap(ctrl_info->iomem_base);
+ pci_release_regions(ctrl_info->pci_dev);
+ pci_disable_device(ctrl_info->pci_dev);
+ pci_set_drvdata(ctrl_info->pci_dev, NULL);
+}
+
+static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
+{
+ struct pqi_ctrl_info *ctrl_info;
+
+ ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
+ GFP_KERNEL, numa_node);
+ if (!ctrl_info)
+ return NULL;
+
+ mutex_init(&ctrl_info->scan_mutex);
+
+ INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
+ spin_lock_init(&ctrl_info->scsi_device_list_lock);
+
+ INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
+ atomic_set(&ctrl_info->num_interrupts, 0);
+
+ INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
+ INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
+
+ sema_init(&ctrl_info->sync_request_sem,
+ PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
+ sema_init(&ctrl_info->lun_reset_sem, PQI_RESERVED_IO_SLOTS_LUN_RESET);
+
+ ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
+ ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
+
+ return ctrl_info;
+}
+
+static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
+{
+ kfree(ctrl_info);
+}
+
+static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
+{
+ pqi_irq_unset_affinity_hint(ctrl_info);
+ pqi_free_irqs(ctrl_info);
+ if (ctrl_info->num_msix_vectors_enabled)
+ pci_disable_msix(ctrl_info->pci_dev);
+}
+
+static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
+{
+ pqi_stop_heartbeat_timer(ctrl_info);
+ pqi_free_interrupts(ctrl_info);
+ if (ctrl_info->queue_memory_base)
+ dma_free_coherent(&ctrl_info->pci_dev->dev,
+ ctrl_info->queue_memory_length,
+ ctrl_info->queue_memory_base,
+ ctrl_info->queue_memory_base_dma_handle);
+ if (ctrl_info->admin_queue_memory_base)
+ dma_free_coherent(&ctrl_info->pci_dev->dev,
+ ctrl_info->admin_queue_memory_length,
+ ctrl_info->admin_queue_memory_base,
+ ctrl_info->admin_queue_memory_base_dma_handle);
+ pqi_free_all_io_requests(ctrl_info);
+ if (ctrl_info->error_buffer)
+ dma_free_coherent(&ctrl_info->pci_dev->dev,
+ ctrl_info->error_buffer_length,
+ ctrl_info->error_buffer,
+ ctrl_info->error_buffer_dma_handle);
+ if (ctrl_info->iomem_base)
+ pqi_cleanup_pci_init(ctrl_info);
+ pqi_free_ctrl_info(ctrl_info);
+}
+
+static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+
+ if (ctrl_info->controller_online) {
+ cancel_delayed_work_sync(&ctrl_info->rescan_work);
+ cancel_delayed_work_sync(&ctrl_info->update_time_work);
+ pqi_remove_all_scsi_devices(ctrl_info);
+ pqi_unregister_scsi(ctrl_info);
+ ctrl_info->controller_online = false;
+ }
+ if (ctrl_info->pqi_mode_enabled) {
+ sis_disable_msix(ctrl_info);
+ rc = pqi_reset(ctrl_info);
+ if (rc == 0)
+ sis_reenable_sis_mode(ctrl_info);
+ }
+ pqi_free_ctrl_resources(ctrl_info);
+}
+
+static void pqi_print_ctrl_info(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ char *ctrl_description;
+
+ if (id->driver_data) {
+ ctrl_description = (char *)id->driver_data;
+ } else {
+ switch (id->subvendor) {
+ case PCI_VENDOR_ID_HP:
+ ctrl_description = hpe_branded_controller;
+ break;
+ case PCI_VENDOR_ID_ADAPTEC2:
+ default:
+ ctrl_description = microsemi_branded_controller;
+ break;
+ }
+ }
+
+ dev_info(&pdev->dev, "%s found\n", ctrl_description);
+}
+
+static int pqi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ int rc;
+ int node;
+ struct pqi_ctrl_info *ctrl_info;
+
+ pqi_print_ctrl_info(pdev, id);
+
+ if (pqi_disable_device_id_wildcards &&
+ id->subvendor == PCI_ANY_ID &&
+ id->subdevice == PCI_ANY_ID) {
+ dev_warn(&pdev->dev,
+ "controller not probed because device ID wildcards are disabled\n");
+ return -ENODEV;
+ }
+
+ if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
+ dev_warn(&pdev->dev,
+ "controller device ID matched using wildcards\n");
+
+ node = dev_to_node(&pdev->dev);
+ if (node == NUMA_NO_NODE)
+ set_dev_node(&pdev->dev, 0);
+
+ ctrl_info = pqi_alloc_ctrl_info(node);
+ if (!ctrl_info) {
+ dev_err(&pdev->dev,
+ "failed to allocate controller info block\n");
+ return -ENOMEM;
+ }
+
+ ctrl_info->pci_dev = pdev;
+
+ rc = pqi_pci_init(ctrl_info);
+ if (rc)
+ goto error;
+
+ rc = pqi_ctrl_init(ctrl_info);
+ if (rc)
+ goto error;
+
+ return 0;
+
+error:
+ pqi_remove_ctrl(ctrl_info);
+
+ return rc;
+}
+
+static void pqi_pci_remove(struct pci_dev *dev)
+{
+ struct pqi_ctrl_info *ctrl_info;
+
+ ctrl_info = pci_get_drvdata(dev);
+ if (!ctrl_info)
+ return;
+
+ pqi_remove_ctrl(ctrl_info);
+}
+
+static void pqi_shutdown(struct pci_dev *dev)
+{
+ int rc;
+ struct pqi_ctrl_info *ctrl_info;
+
+ ctrl_info = pci_get_drvdata(dev);
+ if (!ctrl_info)
+ goto error;
+
+ /*
+ * Write all data in the controller's battery-backed cache to
+ * storage.
+ */
+ rc = pqi_flush_cache(ctrl_info);
+ if (rc == 0)
+ return;
+
+error:
+ dev_warn(&dev->dev,
+ "unable to flush controller cache\n");
+}
+
+static struct pci_driver pqi_pci_driver = {
+ .name = DRIVER_NAME_SHORT,
+ .id_table = pqi_pci_id_table,
+ .probe = pqi_pci_probe,
+ .remove = pqi_pci_remove,
+ .shutdown = pqi_shutdown,
+};
+
+static int __init pqi_init(void)
+{
+ int rc;
+
+ pr_info(DRIVER_NAME "\n");
+
+ pqi_sas_transport_template =
+ sas_attach_transport(&pqi_sas_transport_functions);
+ if (!pqi_sas_transport_template)
+ return -ENODEV;
+
+ rc = pci_register_driver(&pqi_pci_driver);
+ if (rc)
+ sas_release_transport(pqi_sas_transport_template);
+
+ return rc;
+}
+
+static void __exit pqi_cleanup(void)
+{
+ pci_unregister_driver(&pqi_pci_driver);
+ sas_release_transport(pqi_sas_transport_template);
+}
+
+module_init(pqi_init);
+module_exit(pqi_cleanup);
+
+static void __attribute__((unused)) verify_structures(void)
+{
+ BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
+ sis_host_to_ctrl_doorbell) != 0x20);
+ BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
+ sis_interrupt_mask) != 0x34);
+ BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
+ sis_ctrl_to_host_doorbell) != 0x9c);
+ BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
+ sis_ctrl_to_host_doorbell_clear) != 0xa0);
+ BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
+ sis_firmware_status) != 0xbc);
+ BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
+ sis_mailbox) != 0x1000);
+ BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
+ pqi_registers) != 0x4000);
+
+ BUILD_BUG_ON(offsetof(struct pqi_iu_header,
+ iu_type) != 0x0);
+ BUILD_BUG_ON(offsetof(struct pqi_iu_header,
+ iu_length) != 0x2);
+ BUILD_BUG_ON(offsetof(struct pqi_iu_header,
+ response_queue_id) != 0x4);
+ BUILD_BUG_ON(offsetof(struct pqi_iu_header,
+ work_area) != 0x6);
+ BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
+
+ BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
+ status) != 0x0);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
+ service_response) != 0x1);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
+ data_present) != 0x2);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
+ reserved) != 0x3);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
+ residual_count) != 0x4);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
+ data_length) != 0x8);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
+ reserved1) != 0xa);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
+ data) != 0xc);
+ BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
+
+ BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+ data_in_result) != 0x0);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+ data_out_result) != 0x1);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+ reserved) != 0x2);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+ status) != 0x5);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+ status_qualifier) != 0x6);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+ sense_data_length) != 0x8);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+ response_data_length) != 0xa);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+ data_in_transferred) != 0xc);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+ data_out_transferred) != 0x10);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+ data) != 0x14);
+ BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
+
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ signature) != 0x0);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ function_and_status_code) != 0x8);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ max_admin_iq_elements) != 0x10);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ max_admin_oq_elements) != 0x11);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ admin_iq_element_length) != 0x12);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ admin_oq_element_length) != 0x13);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ max_reset_timeout) != 0x14);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ legacy_intx_status) != 0x18);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ legacy_intx_mask_set) != 0x1c);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ legacy_intx_mask_clear) != 0x20);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ device_status) != 0x40);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ admin_iq_pi_offset) != 0x48);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ admin_oq_ci_offset) != 0x50);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ admin_iq_element_array_addr) != 0x58);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ admin_oq_element_array_addr) != 0x60);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ admin_iq_ci_addr) != 0x68);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ admin_oq_pi_addr) != 0x70);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ admin_iq_num_elements) != 0x78);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ admin_oq_num_elements) != 0x79);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ admin_queue_int_msg_num) != 0x7a);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ device_error) != 0x80);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ error_details) != 0x88);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ device_reset) != 0x90);
+ BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+ power_action) != 0x94);
+ BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
+
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ header.iu_type) != 0);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ header.iu_length) != 2);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ header.work_area) != 6);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ request_id) != 8);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ function_code) != 10);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.report_device_capability.buffer_length) != 44);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.report_device_capability.sg_descriptor) != 48);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.create_operational_iq.queue_id) != 12);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.create_operational_iq.element_array_addr) != 16);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.create_operational_iq.ci_addr) != 24);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.create_operational_iq.num_elements) != 32);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.create_operational_iq.element_length) != 34);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.create_operational_iq.queue_protocol) != 36);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.create_operational_oq.queue_id) != 12);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.create_operational_oq.element_array_addr) != 16);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.create_operational_oq.pi_addr) != 24);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.create_operational_oq.num_elements) != 32);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.create_operational_oq.element_length) != 34);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.create_operational_oq.queue_protocol) != 36);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.create_operational_oq.int_msg_num) != 40);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.create_operational_oq.coalescing_count) != 42);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.create_operational_oq.min_coalescing_time) != 44);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.create_operational_oq.max_coalescing_time) != 48);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+ data.delete_operational_queue.queue_id) != 12);
+ BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
+ BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
+ data.create_operational_iq) != 64 - 11);
+ BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
+ data.create_operational_oq) != 64 - 11);
+ BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
+ data.delete_operational_queue) != 64 - 11);
+
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+ header.iu_type) != 0);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+ header.iu_length) != 2);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+ header.work_area) != 6);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+ request_id) != 8);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+ function_code) != 10);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+ status) != 11);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+ data.create_operational_iq.status_descriptor) != 12);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+ data.create_operational_iq.iq_pi_offset) != 16);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+ data.create_operational_oq.status_descriptor) != 12);
+ BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+ data.create_operational_oq.oq_ci_offset) != 16);
+ BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
+
+ BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+ header.iu_type) != 0);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+ header.iu_length) != 2);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+ header.response_queue_id) != 4);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+ header.work_area) != 6);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+ request_id) != 8);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+ nexus_id) != 10);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+ buffer_length) != 12);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+ lun_number) != 16);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+ protocol_spec) != 24);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+ error_index) != 27);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+ cdb) != 32);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+ additional_cdb_bytes) != 48);
+ BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+ sg_descriptors) != 64);
+ BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
+ PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
+
+ BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+ header.iu_type) != 0);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+ header.iu_length) != 2);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+ header.response_queue_id) != 4);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+ header.work_area) != 6);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+ request_id) != 8);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+ nexus_id) != 12);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+ buffer_length) != 16);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+ data_encryption_key_index) != 22);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+ encrypt_tweak_lower) != 24);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+ encrypt_tweak_upper) != 28);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+ cdb) != 32);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+ error_index) != 48);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+ num_sg_descriptors) != 50);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+ cdb_length) != 51);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+ lun_number) != 52);
+ BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+ sg_descriptors) != 64);
+ BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
+ PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
+
+ BUILD_BUG_ON(offsetof(struct pqi_io_response,
+ header.iu_type) != 0);
+ BUILD_BUG_ON(offsetof(struct pqi_io_response,
+ header.iu_length) != 2);
+ BUILD_BUG_ON(offsetof(struct pqi_io_response,
+ request_id) != 8);
+ BUILD_BUG_ON(offsetof(struct pqi_io_response,
+ error_index) != 10);
+
+ BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+ header.iu_type) != 0);
+ BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+ header.iu_length) != 2);
+ BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+ header.response_queue_id) != 4);
+ BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+ request_id) != 8);
+ BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+ data.report_event_configuration.buffer_length) != 12);
+ BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+ data.report_event_configuration.sg_descriptors) != 16);
+ BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+ data.set_event_configuration.global_event_oq_id) != 10);
+ BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+ data.set_event_configuration.buffer_length) != 12);
+ BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+ data.set_event_configuration.sg_descriptors) != 16);
+
+ BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
+ max_inbound_iu_length) != 6);
+ BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
+ max_outbound_iu_length) != 14);
+ BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
+
+ BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+ data_length) != 0);
+ BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+ iq_arbitration_priority_support_bitmask) != 8);
+ BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+ maximum_aw_a) != 9);
+ BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+ maximum_aw_b) != 10);
+ BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+ maximum_aw_c) != 11);
+ BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+ max_inbound_queues) != 16);
+ BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+ max_elements_per_iq) != 18);
+ BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+ max_iq_element_length) != 24);
+ BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+ min_iq_element_length) != 26);
+ BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+ max_outbound_queues) != 30);
+ BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+ max_elements_per_oq) != 32);
+ BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+ intr_coalescing_time_granularity) != 34);
+ BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+ max_oq_element_length) != 36);
+ BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+ min_oq_element_length) != 38);
+ BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+ iu_layer_descriptors) != 64);
+ BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
+
+ BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
+ event_type) != 0);
+ BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
+ oq_id) != 2);
+ BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
+
+ BUILD_BUG_ON(offsetof(struct pqi_event_config,
+ num_event_descriptors) != 2);
+ BUILD_BUG_ON(offsetof(struct pqi_event_config,
+ descriptors) != 4);
+
+ BUILD_BUG_ON(offsetof(struct pqi_event_response,
+ header.iu_type) != 0);
+ BUILD_BUG_ON(offsetof(struct pqi_event_response,
+ header.iu_length) != 2);
+ BUILD_BUG_ON(offsetof(struct pqi_event_response,
+ event_type) != 8);
+ BUILD_BUG_ON(offsetof(struct pqi_event_response,
+ event_id) != 10);
+ BUILD_BUG_ON(offsetof(struct pqi_event_response,
+ additional_event_id) != 12);
+ BUILD_BUG_ON(offsetof(struct pqi_event_response,
+ data) != 16);
+ BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
+
+ BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
+ header.iu_type) != 0);
+ BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
+ header.iu_length) != 2);
+ BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
+ event_type) != 8);
+ BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
+ event_id) != 10);
+ BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
+ additional_event_id) != 12);
+ BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
+
+ BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+ header.iu_type) != 0);
+ BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+ header.iu_length) != 2);
+ BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+ request_id) != 8);
+ BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+ nexus_id) != 10);
+ BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+ lun_number) != 16);
+ BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+ protocol_spec) != 24);
+ BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+ outbound_queue_id_to_manage) != 26);
+ BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+ request_id_to_manage) != 28);
+ BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+ task_management_function) != 30);
+ BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
+
+ BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
+ header.iu_type) != 0);
+ BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
+ header.iu_length) != 2);
+ BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
+ request_id) != 8);
+ BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
+ nexus_id) != 10);
+ BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
+ additional_response_info) != 12);
+ BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
+ response_code) != 15);
+ BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
+
+ BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
+ configured_logical_drive_count) != 0);
+ BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
+ configuration_signature) != 1);
+ BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
+ firmware_version) != 5);
+ BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
+ extended_logical_unit_count) != 154);
+ BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
+ firmware_build_number) != 190);
+ BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
+ controller_mode) != 292);
+
+ BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
+ BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
+ BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
+ PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
+ BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
+ PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
+ BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
+ BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
+ PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
+ BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
+ BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
+ PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
+}
diff --git a/drivers/scsi/smartpqi/smartpqi_sas_transport.c b/drivers/scsi/smartpqi/smartpqi_sas_transport.c
new file mode 100644
index 0000000..bd11ec1
--- /dev/null
+++ b/drivers/scsi/smartpqi/smartpqi_sas_transport.c
@@ -0,0 +1,350 @@
+/*
+ * driver for Microsemi PQI-based storage controllers
+ * Copyright (c) 2016 Microsemi Corporation
+ * Copyright (c) 2016 PMC-Sierra, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more details.
+ *
+ * Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
+ *
+ */
+
+#include <linux/kernel.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_transport_sas.h>
+#include "smartpqi.h"
+
+static struct pqi_sas_phy *pqi_alloc_sas_phy(struct pqi_sas_port *pqi_sas_port)
+{
+ struct pqi_sas_phy *pqi_sas_phy;
+ struct sas_phy *phy;
+
+ pqi_sas_phy = kzalloc(sizeof(*pqi_sas_phy), GFP_KERNEL);
+ if (!pqi_sas_phy)
+ return NULL;
+
+ phy = sas_phy_alloc(pqi_sas_port->parent_node->parent_dev,
+ pqi_sas_port->next_phy_index);
+ if (!phy) {
+ kfree(pqi_sas_phy);
+ return NULL;
+ }
+
+ pqi_sas_port->next_phy_index++;
+ pqi_sas_phy->phy = phy;
+ pqi_sas_phy->parent_port = pqi_sas_port;
+
+ return pqi_sas_phy;
+}
+
+static void pqi_free_sas_phy(struct pqi_sas_phy *pqi_sas_phy)
+{
+ struct sas_phy *phy = pqi_sas_phy->phy;
+
+ sas_port_delete_phy(pqi_sas_phy->parent_port->port, phy);
+ sas_phy_free(phy);
+ if (pqi_sas_phy->added_to_port)
+ list_del(&pqi_sas_phy->phy_list_entry);
+ kfree(pqi_sas_phy);
+}
+
+static int pqi_sas_port_add_phy(struct pqi_sas_phy *pqi_sas_phy)
+{
+ int rc;
+ struct pqi_sas_port *pqi_sas_port;
+ struct sas_phy *phy;
+ struct sas_identify *identify;
+
+ pqi_sas_port = pqi_sas_phy->parent_port;
+ phy = pqi_sas_phy->phy;
+
+ identify = &phy->identify;
+ memset(identify, 0, sizeof(*identify));
+ identify->sas_address = pqi_sas_port->sas_address;
+ identify->device_type = SAS_END_DEVICE;
+ identify->initiator_port_protocols = SAS_PROTOCOL_STP;
+ identify->target_port_protocols = SAS_PROTOCOL_STP;
+ phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
+ phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
+ phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
+ phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
+ phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
+
+ rc = sas_phy_add(pqi_sas_phy->phy);
+ if (rc)
+ return rc;
+
+ sas_port_add_phy(pqi_sas_port->port, pqi_sas_phy->phy);
+ list_add_tail(&pqi_sas_phy->phy_list_entry,
+ &pqi_sas_port->phy_list_head);
+ pqi_sas_phy->added_to_port = true;
+
+ return 0;
+}
+
+static int pqi_sas_port_add_rphy(struct pqi_sas_port *pqi_sas_port,
+ struct sas_rphy *rphy)
+{
+ struct sas_identify *identify;
+
+ identify = &rphy->identify;
+ identify->sas_address = pqi_sas_port->sas_address;
+ identify->initiator_port_protocols = SAS_PROTOCOL_STP;
+ identify->target_port_protocols = SAS_PROTOCOL_STP;
+
+ return sas_rphy_add(rphy);
+}
+
+static struct pqi_sas_port *pqi_alloc_sas_port(
+ struct pqi_sas_node *pqi_sas_node, u64 sas_address)
+{
+ int rc;
+ struct pqi_sas_port *pqi_sas_port;
+ struct sas_port *port;
+
+ pqi_sas_port = kzalloc(sizeof(*pqi_sas_port), GFP_KERNEL);
+ if (!pqi_sas_port)
+ return NULL;
+
+ INIT_LIST_HEAD(&pqi_sas_port->phy_list_head);
+ pqi_sas_port->parent_node = pqi_sas_node;
+
+ port = sas_port_alloc_num(pqi_sas_node->parent_dev);
+ if (!port)
+ goto free_pqi_port;
+
+ rc = sas_port_add(port);
+ if (rc)
+ goto free_sas_port;
+
+ pqi_sas_port->port = port;
+ pqi_sas_port->sas_address = sas_address;
+ list_add_tail(&pqi_sas_port->port_list_entry,
+ &pqi_sas_node->port_list_head);
+
+ return pqi_sas_port;
+
+free_sas_port:
+ sas_port_free(port);
+free_pqi_port:
+ kfree(pqi_sas_port);
+
+ return NULL;
+}
+
+static void pqi_free_sas_port(struct pqi_sas_port *pqi_sas_port)
+{
+ struct pqi_sas_phy *pqi_sas_phy;
+ struct pqi_sas_phy *next;
+
+ list_for_each_entry_safe(pqi_sas_phy, next,
+ &pqi_sas_port->phy_list_head, phy_list_entry)
+ pqi_free_sas_phy(pqi_sas_phy);
+
+ sas_port_delete(pqi_sas_port->port);
+ list_del(&pqi_sas_port->port_list_entry);
+ kfree(pqi_sas_port);
+}
+
+static struct pqi_sas_node *pqi_alloc_sas_node(struct device *parent_dev)
+{
+ struct pqi_sas_node *pqi_sas_node;
+
+ pqi_sas_node = kzalloc(sizeof(*pqi_sas_node), GFP_KERNEL);
+ if (pqi_sas_node) {
+ pqi_sas_node->parent_dev = parent_dev;
+ INIT_LIST_HEAD(&pqi_sas_node->port_list_head);
+ }
+
+ return pqi_sas_node;
+}
+
+static void pqi_free_sas_node(struct pqi_sas_node *pqi_sas_node)
+{
+ struct pqi_sas_port *pqi_sas_port;
+ struct pqi_sas_port *next;
+
+ if (!pqi_sas_node)
+ return;
+
+ list_for_each_entry_safe(pqi_sas_port, next,
+ &pqi_sas_node->port_list_head, port_list_entry)
+ pqi_free_sas_port(pqi_sas_port);
+
+ kfree(pqi_sas_node);
+}
+
+struct pqi_scsi_dev_t *pqi_find_device_by_sas_rphy(
+ struct pqi_ctrl_info *ctrl_info, struct sas_rphy *rphy)
+{
+ struct pqi_scsi_dev_t *device;
+
+ list_for_each_entry(device, &ctrl_info->scsi_device_list,
+ scsi_device_list_entry) {
+ if (!device->sas_port)
+ continue;
+ if (device->sas_port->rphy == rphy)
+ return device;
+ }
+
+ return NULL;
+}
+
+int pqi_add_sas_host(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ struct device *parent_dev;
+ struct pqi_sas_node *pqi_sas_node;
+ struct pqi_sas_port *pqi_sas_port;
+ struct pqi_sas_phy *pqi_sas_phy;
+
+ parent_dev = &ctrl_info->scsi_host->shost_gendev;
+
+ pqi_sas_node = pqi_alloc_sas_node(parent_dev);
+ if (!pqi_sas_node)
+ return -ENOMEM;
+
+ pqi_sas_port = pqi_alloc_sas_port(pqi_sas_node, ctrl_info->sas_address);
+ if (!pqi_sas_port) {
+ rc = -ENODEV;
+ goto free_sas_node;
+ }
+
+ pqi_sas_phy = pqi_alloc_sas_phy(pqi_sas_port);
+ if (!pqi_sas_phy) {
+ rc = -ENODEV;
+ goto free_sas_port;
+ }
+
+ rc = pqi_sas_port_add_phy(pqi_sas_phy);
+ if (rc)
+ goto free_sas_phy;
+
+ ctrl_info->sas_host = pqi_sas_node;
+
+ return 0;
+
+free_sas_phy:
+ pqi_free_sas_phy(pqi_sas_phy);
+free_sas_port:
+ pqi_free_sas_port(pqi_sas_port);
+free_sas_node:
+ pqi_free_sas_node(pqi_sas_node);
+
+ return rc;
+}
+
+void pqi_delete_sas_host(struct pqi_ctrl_info *ctrl_info)
+{
+ pqi_free_sas_node(ctrl_info->sas_host);
+}
+
+int pqi_add_sas_device(struct pqi_sas_node *pqi_sas_node,
+ struct pqi_scsi_dev_t *device)
+{
+ int rc;
+ struct pqi_sas_port *pqi_sas_port;
+ struct sas_rphy *rphy;
+
+ pqi_sas_port = pqi_alloc_sas_port(pqi_sas_node, device->sas_address);
+ if (!pqi_sas_port)
+ return -ENOMEM;
+
+ rphy = sas_end_device_alloc(pqi_sas_port->port);
+ if (!rphy) {
+ rc = -ENODEV;
+ goto free_sas_port;
+ }
+
+ pqi_sas_port->rphy = rphy;
+ device->sas_port = pqi_sas_port;
+
+ rc = pqi_sas_port_add_rphy(pqi_sas_port, rphy);
+ if (rc)
+ goto free_sas_port;
+
+ return 0;
+
+free_sas_port:
+ pqi_free_sas_port(pqi_sas_port);
+ device->sas_port = NULL;
+
+ return rc;
+}
+
+void pqi_remove_sas_device(struct pqi_scsi_dev_t *device)
+{
+ if (device->sas_port) {
+ pqi_free_sas_port(device->sas_port);
+ device->sas_port = NULL;
+ }
+}
+
+static int pqi_sas_get_linkerrors(struct sas_phy *phy)
+{
+ return 0;
+}
+
+static int pqi_sas_get_enclosure_identifier(struct sas_rphy *rphy,
+ u64 *identifier)
+{
+ return 0;
+}
+
+static int pqi_sas_get_bay_identifier(struct sas_rphy *rphy)
+{
+ return -ENXIO;
+}
+
+static int pqi_sas_phy_reset(struct sas_phy *phy, int hard_reset)
+{
+ return 0;
+}
+
+static int pqi_sas_phy_enable(struct sas_phy *phy, int enable)
+{
+ return 0;
+}
+
+static int pqi_sas_phy_setup(struct sas_phy *phy)
+{
+ return 0;
+}
+
+static void pqi_sas_phy_release(struct sas_phy *phy)
+{
+}
+
+static int pqi_sas_phy_speed(struct sas_phy *phy,
+ struct sas_phy_linkrates *rates)
+{
+ return -EINVAL;
+}
+
+/* SMP = Serial Management Protocol */
+
+static int pqi_sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
+ struct request *req)
+{
+ return -EINVAL;
+}
+
+struct sas_function_template pqi_sas_transport_functions = {
+ .get_linkerrors = pqi_sas_get_linkerrors,
+ .get_enclosure_identifier = pqi_sas_get_enclosure_identifier,
+ .get_bay_identifier = pqi_sas_get_bay_identifier,
+ .phy_reset = pqi_sas_phy_reset,
+ .phy_enable = pqi_sas_phy_enable,
+ .phy_setup = pqi_sas_phy_setup,
+ .phy_release = pqi_sas_phy_release,
+ .set_phy_speed = pqi_sas_phy_speed,
+ .smp_handler = pqi_sas_smp_handler,
+};
diff --git a/drivers/scsi/smartpqi/smartpqi_sis.c b/drivers/scsi/smartpqi/smartpqi_sis.c
new file mode 100644
index 0000000..5d416a8
--- /dev/null
+++ b/drivers/scsi/smartpqi/smartpqi_sis.c
@@ -0,0 +1,394 @@
+/*
+ * driver for Microsemi PQI-based storage controllers
+ * Copyright (c) 2016 Microsemi Corporation
+ * Copyright (c) 2016 PMC-Sierra, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more details.
+ *
+ * Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <scsi/scsi_device.h>
+#include <asm/unaligned.h>
+#include "smartpqi.h"
+#include "smartpqi_sis.h"
+
+/* legacy SIS interface commands */
+#define SIS_CMD_GET_ADAPTER_PROPERTIES 0x19
+#define SIS_CMD_INIT_BASE_STRUCT_ADDRESS 0x1b
+#define SIS_CMD_GET_PQI_CAPABILITIES 0x3000
+
+/* for submission of legacy SIS commands */
+#define SIS_REENABLE_SIS_MODE 0x1
+#define SIS_ENABLE_MSIX 0x40
+#define SIS_SOFT_RESET 0x100
+#define SIS_CMD_READY 0x200
+#define SIS_CMD_COMPLETE 0x1000
+#define SIS_CLEAR_CTRL_TO_HOST_DOORBELL 0x1000
+#define SIS_CMD_STATUS_SUCCESS 0x1
+#define SIS_CMD_COMPLETE_TIMEOUT_SECS 30
+#define SIS_CMD_COMPLETE_POLL_INTERVAL_MSECS 10
+
+/* used with SIS_CMD_GET_ADAPTER_PROPERTIES command */
+#define SIS_EXTENDED_PROPERTIES_SUPPORTED 0x800000
+#define SIS_SMARTARRAY_FEATURES_SUPPORTED 0x2
+#define SIS_PQI_MODE_SUPPORTED 0x4
+#define SIS_REQUIRED_EXTENDED_PROPERTIES \
+ (SIS_SMARTARRAY_FEATURES_SUPPORTED | SIS_PQI_MODE_SUPPORTED)
+
+/* used with SIS_CMD_INIT_BASE_STRUCT_ADDRESS command */
+#define SIS_BASE_STRUCT_REVISION 9
+#define SIS_BASE_STRUCT_ALIGNMENT 16
+
+#define SIS_CTRL_KERNEL_UP 0x80
+#define SIS_CTRL_KERNEL_PANIC 0x100
+#define SIS_CTRL_READY_TIMEOUT_SECS 30
+#define SIS_CTRL_READY_POLL_INTERVAL_MSECS 10
+
+#pragma pack(1)
+
+/* for use with SIS_CMD_INIT_BASE_STRUCT_ADDRESS command */
+struct sis_base_struct {
+ __le32 revision; /* revision of this structure */
+ __le32 flags; /* reserved */
+ __le32 error_buffer_paddr_low; /* lower 32 bits of physical memory */
+ /* buffer for PQI error response */
+ /* data */
+ __le32 error_buffer_paddr_high; /* upper 32 bits of physical */
+ /* memory buffer for PQI */
+ /* error response data */
+ __le32 error_buffer_element_length; /* length of each PQI error */
+ /* response buffer element */
+ /* in bytes */
+ __le32 error_buffer_num_elements; /* total number of PQI error */
+ /* response buffers available */
+};
+
+#pragma pack()
+
+int sis_wait_for_ctrl_ready(struct pqi_ctrl_info *ctrl_info)
+{
+ unsigned long timeout;
+ u32 status;
+
+ timeout = (SIS_CTRL_READY_TIMEOUT_SECS * HZ) + jiffies;
+
+ while (1) {
+ status = readl(&ctrl_info->registers->sis_firmware_status);
+ if (status != ~0) {
+ if (status & SIS_CTRL_KERNEL_PANIC) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "controller is offline: status code 0x%x\n",
+ readl(
+ &ctrl_info->registers->sis_mailbox[7]));
+ return -ENODEV;
+ }
+ if (status & SIS_CTRL_KERNEL_UP)
+ break;
+ }
+ if (time_after(jiffies, timeout))
+ return -ETIMEDOUT;
+ msleep(SIS_CTRL_READY_POLL_INTERVAL_MSECS);
+ }
+
+ return 0;
+}
+
+bool sis_is_firmware_running(struct pqi_ctrl_info *ctrl_info)
+{
+ bool running;
+ u32 status;
+
+ status = readl(&ctrl_info->registers->sis_firmware_status);
+
+ if (status & SIS_CTRL_KERNEL_PANIC)
+ running = false;
+ else
+ running = true;
+
+ if (!running)
+ dev_err(&ctrl_info->pci_dev->dev,
+ "controller is offline: status code 0x%x\n",
+ readl(&ctrl_info->registers->sis_mailbox[7]));
+
+ return running;
+}
+
+/* used for passing command parameters/results when issuing SIS commands */
+struct sis_sync_cmd_params {
+ u32 mailbox[6]; /* mailboxes 0-5 */
+};
+
+static int sis_send_sync_cmd(struct pqi_ctrl_info *ctrl_info,
+ u32 cmd, struct sis_sync_cmd_params *params)
+{
+ struct pqi_ctrl_registers __iomem *registers;
+ unsigned int i;
+ unsigned long timeout;
+ u32 doorbell;
+ u32 cmd_status;
+
+ registers = ctrl_info->registers;
+
+ /* Write the command to mailbox 0. */
+ writel(cmd, ®isters->sis_mailbox[0]);
+
+ /*
+ * Write the command parameters to mailboxes 1-4 (mailbox 5 is not used
+ * when sending a command to the controller).
+ */
+ for (i = 1; i <= 4; i++)
+ writel(params->mailbox[i], ®isters->sis_mailbox[i]);
+
+ /* Clear the command doorbell. */
+ writel(SIS_CLEAR_CTRL_TO_HOST_DOORBELL,
+ ®isters->sis_ctrl_to_host_doorbell_clear);
+
+ /* Disable doorbell interrupts by masking all interrupts. */
+ writel(~0, ®isters->sis_interrupt_mask);
+
+ /*
+ * Force the completion of the interrupt mask register write before
+ * submitting the command.
+ */
+ readl(®isters->sis_interrupt_mask);
+
+ /* Submit the command to the controller. */
+ writel(SIS_CMD_READY, ®isters->sis_host_to_ctrl_doorbell);
+
+ /*
+ * Poll for command completion. Note that the call to msleep() is at
+ * the top of the loop in order to give the controller time to start
+ * processing the command before we start polling.
+ */
+ timeout = (SIS_CMD_COMPLETE_TIMEOUT_SECS * HZ) + jiffies;
+ while (1) {
+ msleep(SIS_CMD_COMPLETE_POLL_INTERVAL_MSECS);
+ doorbell = readl(®isters->sis_ctrl_to_host_doorbell);
+ if (doorbell & SIS_CMD_COMPLETE)
+ break;
+ if (time_after(jiffies, timeout))
+ return -ETIMEDOUT;
+ }
+
+ /* Read the command status from mailbox 0. */
+ cmd_status = readl(®isters->sis_mailbox[0]);
+ if (cmd_status != SIS_CMD_STATUS_SUCCESS) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "SIS command failed for command 0x%x: status = 0x%x\n",
+ cmd, cmd_status);
+ return -EINVAL;
+ }
+
+ /*
+ * The command completed successfully, so save the command status and
+ * read the values returned in mailboxes 1-5.
+ */
+ params->mailbox[0] = cmd_status;
+ for (i = 1; i < ARRAY_SIZE(params->mailbox); i++)
+ params->mailbox[i] = readl(®isters->sis_mailbox[i]);
+
+ return 0;
+}
+
+/*
+ * This function verifies that we are talking to a controller that speaks PQI.
+ */
+
+int sis_get_ctrl_properties(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ u32 properties;
+ u32 extended_properties;
+ struct sis_sync_cmd_params params;
+
+ memset(¶ms, 0, sizeof(params));
+
+ rc = sis_send_sync_cmd(ctrl_info, SIS_CMD_GET_ADAPTER_PROPERTIES,
+ ¶ms);
+ if (rc)
+ return rc;
+
+ properties = params.mailbox[1];
+
+ if (!(properties & SIS_EXTENDED_PROPERTIES_SUPPORTED))
+ return -ENODEV;
+
+ extended_properties = params.mailbox[4];
+
+ if ((extended_properties & SIS_REQUIRED_EXTENDED_PROPERTIES) !=
+ SIS_REQUIRED_EXTENDED_PROPERTIES)
+ return -ENODEV;
+
+ return 0;
+}
+
+int sis_get_pqi_capabilities(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ struct sis_sync_cmd_params params;
+
+ memset(¶ms, 0, sizeof(params));
+
+ rc = sis_send_sync_cmd(ctrl_info, SIS_CMD_GET_PQI_CAPABILITIES,
+ ¶ms);
+ if (rc)
+ return rc;
+
+ ctrl_info->max_sg_entries = params.mailbox[1];
+ ctrl_info->max_transfer_size = params.mailbox[2];
+ ctrl_info->max_outstanding_requests = params.mailbox[3];
+ ctrl_info->config_table_offset = params.mailbox[4];
+ ctrl_info->config_table_length = params.mailbox[5];
+
+ return 0;
+}
+
+int sis_init_base_struct_addr(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ void *base_struct_unaligned;
+ struct sis_base_struct *base_struct;
+ struct sis_sync_cmd_params params;
+ unsigned long error_buffer_paddr;
+ dma_addr_t bus_address;
+
+ base_struct_unaligned = kzalloc(sizeof(*base_struct)
+ + SIS_BASE_STRUCT_ALIGNMENT - 1, GFP_KERNEL);
+ if (!base_struct_unaligned)
+ return -ENOMEM;
+
+ base_struct = PTR_ALIGN(base_struct_unaligned,
+ SIS_BASE_STRUCT_ALIGNMENT);
+ error_buffer_paddr = (unsigned long)ctrl_info->error_buffer_dma_handle;
+
+ put_unaligned_le32(SIS_BASE_STRUCT_REVISION, &base_struct->revision);
+ put_unaligned_le32(lower_32_bits(error_buffer_paddr),
+ &base_struct->error_buffer_paddr_low);
+ put_unaligned_le32(upper_32_bits(error_buffer_paddr),
+ &base_struct->error_buffer_paddr_high);
+ put_unaligned_le32(PQI_ERROR_BUFFER_ELEMENT_LENGTH,
+ &base_struct->error_buffer_element_length);
+ put_unaligned_le32(ctrl_info->max_io_slots,
+ &base_struct->error_buffer_num_elements);
+
+ bus_address = pci_map_single(ctrl_info->pci_dev, base_struct,
+ sizeof(*base_struct), PCI_DMA_TODEVICE);
+ if (pci_dma_mapping_error(ctrl_info->pci_dev, bus_address)) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ memset(¶ms, 0, sizeof(params));
+ params.mailbox[1] = lower_32_bits((u64)bus_address);
+ params.mailbox[2] = upper_32_bits((u64)bus_address);
+ params.mailbox[3] = sizeof(*base_struct);
+
+ rc = sis_send_sync_cmd(ctrl_info, SIS_CMD_INIT_BASE_STRUCT_ADDRESS,
+ ¶ms);
+
+ pci_unmap_single(ctrl_info->pci_dev, bus_address, sizeof(*base_struct),
+ PCI_DMA_TODEVICE);
+
+out:
+ kfree(base_struct_unaligned);
+
+ return rc;
+}
+
+/* Enable MSI-X interrupts on the controller. */
+
+void sis_enable_msix(struct pqi_ctrl_info *ctrl_info)
+{
+ u32 doorbell_register;
+
+ doorbell_register =
+ readl(&ctrl_info->registers->sis_host_to_ctrl_doorbell);
+ doorbell_register |= SIS_ENABLE_MSIX;
+
+ writel(doorbell_register,
+ &ctrl_info->registers->sis_host_to_ctrl_doorbell);
+}
+
+/* Disable MSI-X interrupts on the controller. */
+
+void sis_disable_msix(struct pqi_ctrl_info *ctrl_info)
+{
+ u32 doorbell_register;
+
+ doorbell_register =
+ readl(&ctrl_info->registers->sis_host_to_ctrl_doorbell);
+ doorbell_register &= ~SIS_ENABLE_MSIX;
+
+ writel(doorbell_register,
+ &ctrl_info->registers->sis_host_to_ctrl_doorbell);
+}
+
+void sis_soft_reset(struct pqi_ctrl_info *ctrl_info)
+{
+ writel(SIS_SOFT_RESET,
+ &ctrl_info->registers->sis_host_to_ctrl_doorbell);
+}
+
+#define SIS_MODE_READY_TIMEOUT_SECS 30
+
+int sis_reenable_sis_mode(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ unsigned long timeout;
+ struct pqi_ctrl_registers __iomem *registers;
+ u32 doorbell;
+
+ registers = ctrl_info->registers;
+
+ writel(SIS_REENABLE_SIS_MODE,
+ ®isters->sis_host_to_ctrl_doorbell);
+
+ rc = 0;
+ timeout = (SIS_MODE_READY_TIMEOUT_SECS * HZ) + jiffies;
+
+ while (1) {
+ doorbell = readl(®isters->sis_ctrl_to_host_doorbell);
+ if ((doorbell & SIS_REENABLE_SIS_MODE) == 0)
+ break;
+ if (time_after(jiffies, timeout)) {
+ rc = -ETIMEDOUT;
+ break;
+ }
+ }
+
+ if (rc)
+ dev_err(&ctrl_info->pci_dev->dev,
+ "re-enabling SIS mode failed\n");
+
+ return rc;
+}
+
+static void __attribute__((unused)) verify_structures(void)
+{
+ BUILD_BUG_ON(offsetof(struct sis_base_struct,
+ revision) != 0x0);
+ BUILD_BUG_ON(offsetof(struct sis_base_struct,
+ flags) != 0x4);
+ BUILD_BUG_ON(offsetof(struct sis_base_struct,
+ error_buffer_paddr_low) != 0x8);
+ BUILD_BUG_ON(offsetof(struct sis_base_struct,
+ error_buffer_paddr_high) != 0xc);
+ BUILD_BUG_ON(offsetof(struct sis_base_struct,
+ error_buffer_element_length) != 0x10);
+ BUILD_BUG_ON(offsetof(struct sis_base_struct,
+ error_buffer_num_elements) != 0x14);
+ BUILD_BUG_ON(sizeof(struct sis_base_struct) != 0x18);
+}
diff --git a/drivers/scsi/smartpqi/smartpqi_sis.h b/drivers/scsi/smartpqi/smartpqi_sis.h
new file mode 100644
index 0000000..d2ff8d5
--- /dev/null
+++ b/drivers/scsi/smartpqi/smartpqi_sis.h
@@ -0,0 +1,32 @@
+/*
+ * driver for Microsemi PQI-based storage controllers
+ * Copyright (c) 2016 Microsemi Corporation
+ * Copyright (c) 2016 PMC-Sierra, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more details.
+ *
+ * Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
+ *
+ */
+
+#if !defined(_SMARTPQI_SIS_H)
+#define _SMARTPQI_SIS_H
+
+int sis_wait_for_ctrl_ready(struct pqi_ctrl_info *ctrl_info);
+bool sis_is_firmware_running(struct pqi_ctrl_info *ctrl_info);
+int sis_get_ctrl_properties(struct pqi_ctrl_info *ctrl_info);
+int sis_get_pqi_capabilities(struct pqi_ctrl_info *ctrl_info);
+int sis_init_base_struct_addr(struct pqi_ctrl_info *ctrl_info);
+void sis_enable_msix(struct pqi_ctrl_info *ctrl_info);
+void sis_disable_msix(struct pqi_ctrl_info *ctrl_info);
+void sis_soft_reset(struct pqi_ctrl_info *ctrl_info);
+int sis_reenable_sis_mode(struct pqi_ctrl_info *ctrl_info);
+
+#endif /* _SMARTPQI_SIS_H */
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH V3 2/2] aacraid: remove wildcard for series 9 controllers
2016-06-16 22:48 [PATCH V3 0/2] initial submit of Microsemi smarpqi driver Don Brace
2016-06-16 22:48 ` [PATCH V3 1/2] smartpqi: initial commit of Microsemi smartpqi driver Don Brace
@ 2016-06-16 22:48 ` Don Brace
1 sibling, 0 replies; 7+ messages in thread
From: Don Brace @ 2016-06-16 22:48 UTC (permalink / raw)
To: jejb, Viswas.G, Mahesh.Rajashekhara, hch, scott.teel,
Kevin.Barnett, Justin.Lindley, scott.benesh, elliott
Cc: linux-scsi
Depends on smartpqi driver adoption
Reviewed-by: Kevin Barnett <kevin.barnett@microsemi.com>
Reviewed-by: Scott Teel <scott.teel@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
---
drivers/scsi/aacraid/linit.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index 79871f3..d5b26fa 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -160,7 +160,6 @@ static const struct pci_device_id aac_pci_tbl[] = {
{ 0x9005, 0x028b, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 62 }, /* Adaptec PMC Series 6 (Tupelo) */
{ 0x9005, 0x028c, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 63 }, /* Adaptec PMC Series 7 (Denali) */
{ 0x9005, 0x028d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 64 }, /* Adaptec PMC Series 8 */
- { 0x9005, 0x028f, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 65 }, /* Adaptec PMC Series 9 */
{ 0,}
};
MODULE_DEVICE_TABLE(pci, aac_pci_tbl);
@@ -239,7 +238,6 @@ static struct aac_driver_ident aac_drivers[] = {
{ aac_src_init, "aacraid", "ADAPTEC ", "RAID ", 2, AAC_QUIRK_SRC }, /* Adaptec PMC Series 6 (Tupelo) */
{ aac_srcv_init, "aacraid", "ADAPTEC ", "RAID ", 2, AAC_QUIRK_SRC }, /* Adaptec PMC Series 7 (Denali) */
{ aac_srcv_init, "aacraid", "ADAPTEC ", "RAID ", 2, AAC_QUIRK_SRC }, /* Adaptec PMC Series 8 */
- { aac_srcv_init, "aacraid", "ADAPTEC ", "RAID ", 2, AAC_QUIRK_SRC } /* Adaptec PMC Series 9 */
};
/**
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH V3 1/2] smartpqi: initial commit of Microsemi smartpqi driver
2016-06-16 22:48 ` [PATCH V3 1/2] smartpqi: initial commit of Microsemi smartpqi driver Don Brace
@ 2016-06-17 9:57 ` Johannes Thumshirn
2016-06-27 21:12 ` Don Brace
0 siblings, 1 reply; 7+ messages in thread
From: Johannes Thumshirn @ 2016-06-17 9:57 UTC (permalink / raw)
To: Don Brace
Cc: jejb, Viswas.G, Mahesh.Rajashekhara, hch, scott.teel,
Kevin.Barnett, Justin.Lindley, scott.benesh, elliott, linux-scsi
Hi Don/Kevin,
some comments inline (mostly stulistic nothing architectural)
On Thu, Jun 16, 2016 at 05:48:16PM -0500, Don Brace wrote:
> From: Kevin Barnett <kevin.barnett@microsemi.com>
>
> This initial commit contains WIP of Microsemi's smartpqi module.
>
> Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
> Reviewed-by: Kevin Barnett <kevin.barnett@microsemi.com>
if this is From: Kevin it should have his S-o-b as well.
> Signed-off-by: Don Brace <don.brace@microsemi.com>
> ---
[...]
> + */
> +
> +#if !defined(_SMARTPQI_H)
> +#define _SMARTPQI_H
> +
> +#pragma pack(1)
I know GCC does understand #pragma pack() to be compatible with MSVC but please
use the kernel's __packed convention on structs you want to have packed.
> +
> +#define PQI_DEVICE_SIGNATURE "PQI DREG"
[...]
> + pqi_index_t oq_ci_copy;
> + struct task_struct *task;
> + u16 int_msg_num;
> +};
> +
Just for clarification (sorry haven't looked up the sepecs yet) is this a
queue pair or more than two queues (looks like 3 to me)?
> +struct pqi_queue_group {
> + struct pqi_ctrl_info *ctrl_info; /* backpointer */
> + u16 iq_id[2];
> + u16 oq_id;
[...]
> +#define RAID_CTLR_LUNID "\0\0\0\0\0\0\0\0"
> +
> +struct pqi_scsi_dev_t {
For sake of consistency with the other structs "struct pqi_scsi_dev"?
> + int devtype; /* as reported by INQUIRY commmand */
> + u8 device_type; /* as reported by */
[...]
> +
> +/* Define the PCI IDs for the controllers that we support. */
> +static const struct pci_device_id pqi_pci_id_table[] = {
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> + .subdevice = 0x0110,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_HP,
> + .subdevice = 0x0600,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_HP,
> + .subdevice = 0x0601,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_HP,
> + .subdevice = 0x0602,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_HP,
> + .subdevice = 0x0603,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_HP,
> + .subdevice = 0x0650,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_HP,
> + .subdevice = 0x0651,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_HP,
> + .subdevice = 0x0652,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_HP,
> + .subdevice = 0x0653,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_HP,
> + .subdevice = 0x0654,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_HP,
> + .subdevice = 0x0655,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_HP,
> + .subdevice = 0x0700,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_HP,
> + .subdevice = 0x0701,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> + .subdevice = 0x0800,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> + .subdevice = 0x0801,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> + .subdevice = 0x0802,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> + .subdevice = 0x0803,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> + .subdevice = 0x0804,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> + .subdevice = 0x0805,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> + .subdevice = 0x0900,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> + .subdevice = 0x0901,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> + .subdevice = 0x0902,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> + .subdevice = 0x0903,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> + .subdevice = 0x0904,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> + .subdevice = 0x0905,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> + .subdevice = 0x0906,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_HP,
> + .subdevice = 0x1001,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_HP,
> + .subdevice = 0x1100,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_HP,
> + .subdevice = 0x1101,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_HP,
> + .subdevice = 0x1102,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_VENDOR_ID_HP,
> + .subdevice = 0x1150,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + {
> + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> + .device = 0x028f,
> + .subvendor = PCI_ANY_ID,
> + .subdevice = PCI_ANY_ID,
> + .class = 0,
> + .class_mask = 0,
> + .driver_data = 0
> + },
> + { 0 }
> +};
The above table can be drastically reduced by using the PCI_DEVICE_SUB() macro:
static const struct pci_device_id pqi_pci_id_table[] = {
{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x28f, PCI_VENDOR_ID_ADAPTEC2, 0x0110) },
{ PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x28f, PCI_VENDOR_ID_HP, 0x0600) },
...
Also I think it makes more sense near the struct pci_driver way down, as
that's the place it's actuall used.
> +MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
> +
> +static struct {
> + atomic_t num_requests[2];
> + atomic_t num_raid_bypasses;
> + atomic_t num_outstanding_requests[2];
> + atomic_t num_passthru_ioctls;
> + atomic_t num_heartbeat_events;
> + atomic_t num_all_other_events;
> + atomic_t num_scans;
> + atomic_t num_interrupts;
> + atomic_t num_spurious_interrupts;
> + atomic_t num_alloc_io_request_collisions;
> + atomic_t num_spans[2];
> + atomic_t num_interrupts_wrong_cpu;
> +} pqi_statistics = {
> + .num_requests[0] = ATOMIC_INIT(0),
> + .num_requests[1] = ATOMIC_INIT(0),
> + .num_raid_bypasses = ATOMIC_INIT(0),
> + .num_outstanding_requests[0] = ATOMIC_INIT(0),
> + .num_outstanding_requests[1] = ATOMIC_INIT(0),
> + .num_passthru_ioctls = ATOMIC_INIT(0),
> + .num_heartbeat_events = ATOMIC_INIT(0),
> + .num_all_other_events = ATOMIC_INIT(0),
> + .num_scans = ATOMIC_INIT(0),
> + .num_interrupts = ATOMIC_INIT(0),
> + .num_spurious_interrupts = ATOMIC_INIT(0),
> + .num_alloc_io_request_collisions = ATOMIC_INIT(0),
> + .num_spans[0] = ATOMIC_INIT(0),
> + .num_spans[1] = ATOMIC_INIT(0),
> + .num_interrupts_wrong_cpu = ATOMIC_INIT(0),
> +};
Appart from Hannes' comments, I wonder if it really makes sense to have these
statistics on a driver global basis, not per adapter?
> +
> +static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info);
[...]
> +static ssize_t pqi_statistics_show(struct device *dev,
> + struct device_attribute *attr, char *buffer)
> +{
> + ssize_t count = 0;
> + unsigned int num_raid_requests;
> + unsigned int num_aio_requests;
> + unsigned int num_outstanding_raid_requests = 0;
> + unsigned int num_outstanding_aio_requests = 0;
> + struct pqi_ctrl_info *ctrl_info;
> + struct Scsi_Host *shost;
> +
> + shost = class_to_shost(dev);
> + ctrl_info = shost_to_hba(shost);
> +
> + num_raid_requests =
> + atomic_read(&pqi_statistics.num_requests[RAID_PATH]);
> + num_aio_requests = atomic_read(&pqi_statistics.num_requests[AIO_PATH]);
> +
> + num_outstanding_raid_requests =
> + atomic_read(&pqi_statistics.num_outstanding_requests[RAID_PATH]);
> + num_outstanding_aio_requests =
> + atomic_read(&pqi_statistics.num_outstanding_requests[AIO_PATH]);
> +
> + if (pqi_ctrl_offline(ctrl_info))
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + "*** CONTROLLER OFFLINE ***\n");
> +
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + " total requests: %u\n",
> + num_raid_requests + num_aio_requests);
> +
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + " total RAID requests: %u\n",
> + num_raid_requests);
> +
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + " total AIO requests: %u\n",
> + num_aio_requests);
> +
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + " RAID bypasses: %u\n",
> + atomic_read(&pqi_statistics.num_raid_bypasses));
> +
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + "total outstanding requests: %u\n",
> + num_outstanding_raid_requests + num_outstanding_aio_requests);
> +
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + " outstanding RAID requests: %u / %u\n",
> + num_outstanding_raid_requests,
> + ctrl_info->num_queue_groups *
> + (ctrl_info->num_elements_per_iq - 1));
> +
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + " outstanding AIO requests: %u / %u\n",
> + num_outstanding_aio_requests,
> + ctrl_info->num_queue_groups *
> + (ctrl_info->num_elements_per_iq - 1));
> +
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + " passthrough IOCTLs: %u\n",
> + atomic_read(&pqi_statistics.num_passthru_ioctls));
> +
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + " heartbeat events: %u\n",
> + atomic_read(&pqi_statistics.num_heartbeat_events));
> +
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + " all other events: %u\n",
> + atomic_read(&pqi_statistics.num_all_other_events));
> +
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + " scan count: %u\n",
> + atomic_read(&pqi_statistics.num_scans));
> +
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + " interrupts: %u\n",
> + atomic_read(&pqi_statistics.num_interrupts));
> +
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + " spurious interrupts: %u\n",
> + atomic_read(&pqi_statistics.num_spurious_interrupts));
> +
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + " alloc request collisions: %u\n",
> + atomic_read(&pqi_statistics.num_alloc_io_request_collisions));
> +
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + " RAID spans: %u\n",
> + atomic_read(&pqi_statistics.num_spans[RAID_PATH]));
> +
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + " AIO spans: %u\n",
> + atomic_read(&pqi_statistics.num_spans[AIO_PATH]));
> +
> + count += snprintf(buffer + count, PAGE_SIZE - count,
> + " interrupts on wrong CPU: %u\n",
> + atomic_read(&pqi_statistics.num_interrupts_wrong_cpu));
> +
> + return count;
> +}
Wasn't the sysfs rule one entry per file?
> +
> +static ssize_t pqi_devices_show(struct device *dev,
> + struct device_attribute *attr, char *buffer)
> +{
[...]
> + rc = pqi_build_raid_path_request(ctrl_info, &request,
> + SA_CACHE_FLUSH, RAID_CTLR_LUNID, buffer,
> + SA_CACHE_FLUSH_BUFFER_LENGTH, 0, &pci_direction);
> + if (rc)
> + goto out;
> +
> + rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
> + 0, NULL, NO_TIMEOUT);
So if this is called via the shutdown() -> pqi_shutdown() path it /may/ block
shutdown infinitely? I'm not shure this is what people want.
> +
> + pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
> + pci_direction);
> +
> +out:
> + kfree(buffer);
> +
[...]
> +static void pqi_complete_queued_requests(struct pqi_ctrl_info *ctrl_info,
> + struct pqi_scsi_dev_t *device_in_reset)
> +{
> + unsigned int i;
> + unsigned int path;
> + struct pqi_queue_group *queue_group;
> + unsigned long flags;
> + struct pqi_io_request *io_request;
> + struct pqi_io_request *next;
> + struct scsi_cmnd *scmd;
> + struct pqi_scsi_dev_t *device;
> +
> + for (i = 0; i < ctrl_info->num_queue_groups; i++) {
> + queue_group = &ctrl_info->queue_groups[i];
> +
> + for (path = 0; path < 2; path++) {
> + spin_lock_irqsave(&queue_group->submit_lock[path],
> + flags);
> +
> + list_for_each_entry_safe(io_request, next,
> + &queue_group->request_list[path],
> + request_list_entry) {
> + scmd = io_request->scmd;
> + if (scmd) {
> + device = scmd->device->hostdata;
> + if (device == device_in_reset) {
> + set_host_byte(scmd, DID_RESET);
> + pqi_scsi_done(scmd);
> + list_del(&io_request->
> + request_list_entry);
> + }
> + }
> + }
> +
> + spin_unlock_irqrestore(&queue_group->submit_lock[path],
> + flags);
> + }
If you'd factor the inner for loop into an own small (inline) function, it
could drastically improve readability here.
something like
static void pqi_complete_queue_group(struct pqi_queue_group *qg, struct
pqi_device_t *device_in_reset)
{
unsigned int path;
unsigned long flags;
struct qpi_scsi_dev_t *dev;
struct pqi_io_request *ior, *next;
for (path = 0; path < 2; path++) {
spin_lock_irqsave(&qg->submit_lock[path], flags);
list_for_each_entry_save(ior, next, &qg->request_list[path],
request_list_entry) {
scmd = ior->scmnd;
if (!scmd)
continue;
device = scmnd->device->hostdata;
if (dev == device_in_reset) {
set_host_byte(scmnd, DID_RESET);
pqi_scsi_done(scmnd);
list_del(&ior->request_list_entry);
}
}
spin_unlock_irqresetore(&qg->submit_lock[path], flags);
}
}
> + }
> +}
> +
[..]
> +
> +static DEVICE_ATTR(sas_address, S_IRUGO, pqi_sas_address_show, NULL);
> +static DEVICE_ATTR(ssd_smart_path_enabled, S_IRUGO,
> + pqi_ssd_smart_path_enabled_show, NULL);
> +
> +static struct device_attribute *pqi_sdev_attrs[] = {
> + &dev_attr_sas_address,
> + &dev_attr_ssd_smart_path_enabled,
> + NULL
> +};
> +
> +static DEVICE_ATTR(rescan, S_IWUSR, NULL, pqi_host_store_rescan);
> +static DEVICE_ATTR(stats, S_IRUGO, pqi_statistics_show, NULL);
> +static DEVICE_ATTR(devices, S_IRUGO, pqi_devices_show, NULL);
> +static DEVICE_ATTR(version, S_IRUGO, pqi_version_show, NULL);
> +static DEVICE_ATTR(pqi, S_IRUGO, pqi_info_show, NULL);
> +
> +static struct device_attribute *pqi_shost_attrs[] = {
> + &dev_attr_rescan,
> + &dev_attr_stats,
> + &dev_attr_devices,
> + &dev_attr_version,
> + &dev_attr_pqi,
> + NULL
> +};
This should be somewhere near the functions implementing the sysfs show
callbacks.
> +
> +static int pqi_change_queue_depth(struct scsi_device *sdev, int qdepth)
> +{
> + struct pqi_scsi_dev_t *device = sdev->hostdata;
[...]
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
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^ permalink raw reply [flat|nested] 7+ messages in thread
* RE: [PATCH V3 1/2] smartpqi: initial commit of Microsemi smartpqi driver
2016-06-17 9:57 ` Johannes Thumshirn
@ 2016-06-27 21:12 ` Don Brace
2016-06-28 7:53 ` Johannes Thumshirn
0 siblings, 1 reply; 7+ messages in thread
From: Don Brace @ 2016-06-27 21:12 UTC (permalink / raw)
To: Johannes Thumshirn
Cc: jejb, Viswas G, Mahesh Rajashekhara, hch, Scott Teel,
Kevin Barnett, Justin Lindley, Scott Benesh, elliott, linux-scsi
> -----Original Message-----
> From: Johannes Thumshirn [mailto:jthumshirn@suse.de]
> Sent: Friday, June 17, 2016 4:57 AM
> To: Don Brace
> Cc: jejb@linux.vnet.ibm.com; Viswas G; Mahesh Rajashekhara;
> hch@infradead.org; Scott Teel; Kevin Barnett; Justin Lindley; Scott Benesh;
> elliott@hpe.com; linux-scsi@vger.kernel.org
> Subject: Re: [PATCH V3 1/2] smartpqi: initial commit of Microsemi smartpqi
> driver
>
> EXTERNAL EMAIL
>
>
> Hi Don/Kevin,
>
> some comments inline (mostly stulistic nothing architectural)
>
> On Thu, Jun 16, 2016 at 05:48:16PM -0500, Don Brace wrote:
> > From: Kevin Barnett <kevin.barnett@microsemi.com>
> >
> > This initial commit contains WIP of Microsemi's smartpqi module.
> >
> > Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
> > Reviewed-by: Kevin Barnett <kevin.barnett@microsemi.com>
>
> if this is From: Kevin it should have his S-o-b as well.
>
> > Signed-off-by: Don Brace <don.brace@microsemi.com>
Done
> > ---
>
> [...]
>
> > + */
> > +
> > +#if !defined(_SMARTPQI_H)
> > +#define _SMARTPQI_H
> > +
> > +#pragma pack(1)
>
> I know GCC does understand #pragma pack() to be compatible with MSVC
> but please
> use the kernel's __packed convention on structs you want to have packed.
>
We prefer to leave this "as is" for these reasons:
We do not use __packed on other Microsemi Linux drivers.
There's not consistency in the usage of __packed. Just a quick survey of the kernel source reveals at least four styles:
Syntax #1:
struct xxx {
.
} __packed;
Syntax #2:
struct __packed xxx {
.
};
Syntax #3:
struct xxx {
.
} __attribute__((__packed__));
Syntax #4:
struct __attribute__((__packed__)) xxx {
.
};
> > +
> > +#define PQI_DEVICE_SIGNATURE "PQI DREG"
>
> [...]
>
> > + pqi_index_t oq_ci_copy;
> > + struct task_struct *task;
> > + u16 int_msg_num;
> > +};
> > +
>
> Just for clarification (sorry haven't looked up the sepecs yet) is this a
> queue pair or more than two queues (looks like 3 to me)?
>
There are 3 queues
> > +struct pqi_queue_group {
> > + struct pqi_ctrl_info *ctrl_info; /* backpointer */
> > + u16 iq_id[2];
> > + u16 oq_id;
>
> [...]
>
> > +#define RAID_CTLR_LUNID "\0\0\0\0\0\0\0\0"
> > +
> > +struct pqi_scsi_dev_t {
>
> For sake of consistency with the other structs "struct pqi_scsi_dev"?
Done
>
> > + int devtype; /* as reported by INQUIRY commmand */
> > + u8 device_type; /* as reported by */
>
> [...]
>
> > +
> > +/* Define the PCI IDs for the controllers that we support. */
> > +static const struct pci_device_id pqi_pci_id_table[] = {
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .subdevice = 0x0110,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_HP,
> > + .subdevice = 0x0600,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_HP,
> > + .subdevice = 0x0601,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_HP,
> > + .subdevice = 0x0602,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_HP,
> > + .subdevice = 0x0603,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_HP,
> > + .subdevice = 0x0650,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_HP,
> > + .subdevice = 0x0651,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_HP,
> > + .subdevice = 0x0652,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_HP,
> > + .subdevice = 0x0653,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_HP,
> > + .subdevice = 0x0654,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_HP,
> > + .subdevice = 0x0655,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_HP,
> > + .subdevice = 0x0700,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_HP,
> > + .subdevice = 0x0701,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .subdevice = 0x0800,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .subdevice = 0x0801,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .subdevice = 0x0802,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .subdevice = 0x0803,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .subdevice = 0x0804,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .subdevice = 0x0805,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .subdevice = 0x0900,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .subdevice = 0x0901,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .subdevice = 0x0902,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .subdevice = 0x0903,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .subdevice = 0x0904,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .subdevice = 0x0905,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .subdevice = 0x0906,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_HP,
> > + .subdevice = 0x1001,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_HP,
> > + .subdevice = 0x1100,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_HP,
> > + .subdevice = 0x1101,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_HP,
> > + .subdevice = 0x1102,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_VENDOR_ID_HP,
> > + .subdevice = 0x1150,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + {
> > + .vendor = PCI_VENDOR_ID_ADAPTEC2,
> > + .device = 0x028f,
> > + .subvendor = PCI_ANY_ID,
> > + .subdevice = PCI_ANY_ID,
> > + .class = 0,
> > + .class_mask = 0,
> > + .driver_data = 0
> > + },
> > + { 0 }
> > +};
>
>
> The above table can be drastically reduced by using the PCI_DEVICE_SUB()
> macro:
> static const struct pci_device_id pqi_pci_id_table[] = {
> { PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x28f,
> PCI_VENDOR_ID_ADAPTEC2, 0x0110) },
> { PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x28f,
> PCI_VENDOR_ID_HP, 0x0600) },
> ...
>
> Also I think it makes more sense near the struct pci_driver way down, as
> that's the place it's actuall used.
Both done.
>
> > +MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
> > +
> > +static struct {
> > + atomic_t num_requests[2];
> > + atomic_t num_raid_bypasses;
> > + atomic_t num_outstanding_requests[2];
> > + atomic_t num_passthru_ioctls;
> > + atomic_t num_heartbeat_events;
> > + atomic_t num_all_other_events;
> > + atomic_t num_scans;
> > + atomic_t num_interrupts;
> > + atomic_t num_spurious_interrupts;
> > + atomic_t num_alloc_io_request_collisions;
> > + atomic_t num_spans[2];
> > + atomic_t num_interrupts_wrong_cpu;
> > +} pqi_statistics = {
> > + .num_requests[0] = ATOMIC_INIT(0),
> > + .num_requests[1] = ATOMIC_INIT(0),
> > + .num_raid_bypasses = ATOMIC_INIT(0),
> > + .num_outstanding_requests[0] = ATOMIC_INIT(0),
> > + .num_outstanding_requests[1] = ATOMIC_INIT(0),
> > + .num_passthru_ioctls = ATOMIC_INIT(0),
> > + .num_heartbeat_events = ATOMIC_INIT(0),
> > + .num_all_other_events = ATOMIC_INIT(0),
> > + .num_scans = ATOMIC_INIT(0),
> > + .num_interrupts = ATOMIC_INIT(0),
> > + .num_spurious_interrupts = ATOMIC_INIT(0),
> > + .num_alloc_io_request_collisions = ATOMIC_INIT(0),
> > + .num_spans[0] = ATOMIC_INIT(0),
> > + .num_spans[1] = ATOMIC_INIT(0),
> > + .num_interrupts_wrong_cpu = ATOMIC_INIT(0),
> > +};
>
> Appart from Hannes' comments, I wonder if it really makes sense to have
> these
> statistics on a driver global basis, not per adapter?
>
We removed the statistics
> > +
> > +static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info);
>
> [...]
>
> > +static ssize_t pqi_statistics_show(struct device *dev,
> > + struct device_attribute *attr, char *buffer)
> > +{
> > + ssize_t count = 0;
> > + unsigned int num_raid_requests;
> > + unsigned int num_aio_requests;
> > + unsigned int num_outstanding_raid_requests = 0;
> > + unsigned int num_outstanding_aio_requests = 0;
> > + struct pqi_ctrl_info *ctrl_info;
> > + struct Scsi_Host *shost;
> > +
> > + shost = class_to_shost(dev);
> > + ctrl_info = shost_to_hba(shost);
> > +
> > + num_raid_requests =
> > + atomic_read(&pqi_statistics.num_requests[RAID_PATH]);
> > + num_aio_requests =
> atomic_read(&pqi_statistics.num_requests[AIO_PATH]);
> > +
> > + num_outstanding_raid_requests =
> > + atomic_read(&pqi_statistics.num_outstanding_requests[RAID_PATH]);
> > + num_outstanding_aio_requests =
> > + atomic_read(&pqi_statistics.num_outstanding_requests[AIO_PATH]);
> > +
> > + if (pqi_ctrl_offline(ctrl_info))
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + "*** CONTROLLER OFFLINE ***\n");
> > +
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + " total requests: %u\n",
> > + num_raid_requests + num_aio_requests);
> > +
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + " total RAID requests: %u\n",
> > + num_raid_requests);
> > +
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + " total AIO requests: %u\n",
> > + num_aio_requests);
> > +
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + " RAID bypasses: %u\n",
> > + atomic_read(&pqi_statistics.num_raid_bypasses));
> > +
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + "total outstanding requests: %u\n",
> > + num_outstanding_raid_requests +
> num_outstanding_aio_requests);
> > +
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + " outstanding RAID requests: %u / %u\n",
> > + num_outstanding_raid_requests,
> > + ctrl_info->num_queue_groups *
> > + (ctrl_info->num_elements_per_iq - 1));
> > +
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + " outstanding AIO requests: %u / %u\n",
> > + num_outstanding_aio_requests,
> > + ctrl_info->num_queue_groups *
> > + (ctrl_info->num_elements_per_iq - 1));
> > +
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + " passthrough IOCTLs: %u\n",
> > + atomic_read(&pqi_statistics.num_passthru_ioctls));
> > +
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + " heartbeat events: %u\n",
> > + atomic_read(&pqi_statistics.num_heartbeat_events));
> > +
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + " all other events: %u\n",
> > + atomic_read(&pqi_statistics.num_all_other_events));
> > +
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + " scan count: %u\n",
> > + atomic_read(&pqi_statistics.num_scans));
> > +
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + " interrupts: %u\n",
> > + atomic_read(&pqi_statistics.num_interrupts));
> > +
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + " spurious interrupts: %u\n",
> > + atomic_read(&pqi_statistics.num_spurious_interrupts));
> > +
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + " alloc request collisions: %u\n",
> > + atomic_read(&pqi_statistics.num_alloc_io_request_collisions));
> > +
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + " RAID spans: %u\n",
> > + atomic_read(&pqi_statistics.num_spans[RAID_PATH]));
> > +
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + " AIO spans: %u\n",
> > + atomic_read(&pqi_statistics.num_spans[AIO_PATH]));
> > +
> > + count += snprintf(buffer + count, PAGE_SIZE - count,
> > + " interrupts on wrong CPU: %u\n",
> > + atomic_read(&pqi_statistics.num_interrupts_wrong_cpu));
> > +
> > + return count;
> > +}
>
> Wasn't the sysfs rule one entry per file?
We removed this code.
>
> > +
> > +static ssize_t pqi_devices_show(struct device *dev,
> > + struct device_attribute *attr, char *buffer)
> > +{
>
> [...]
>
> > + rc = pqi_build_raid_path_request(ctrl_info, &request,
> > + SA_CACHE_FLUSH, RAID_CTLR_LUNID, buffer,
> > + SA_CACHE_FLUSH_BUFFER_LENGTH, 0, &pci_direction);
> > + if (rc)
> > + goto out;
> > +
> > + rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
> > + 0, NULL, NO_TIMEOUT);
>
> So if this is called via the shutdown() -> pqi_shutdown() path it /may/ block
> shutdown infinitely? I'm not shure this is what people want.
A timeout has been added.
>
> > +
> > + pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
> > + pci_direction);
> > +
> > +out:
> > + kfree(buffer);
> > +
>
> [...]
>
> > +static void pqi_complete_queued_requests(struct pqi_ctrl_info *ctrl_info,
> > + struct pqi_scsi_dev_t *device_in_reset)
> > +{
> > + unsigned int i;
> > + unsigned int path;
> > + struct pqi_queue_group *queue_group;
> > + unsigned long flags;
> > + struct pqi_io_request *io_request;
> > + struct pqi_io_request *next;
> > + struct scsi_cmnd *scmd;
> > + struct pqi_scsi_dev_t *device;
> > +
> > + for (i = 0; i < ctrl_info->num_queue_groups; i++) {
> > + queue_group = &ctrl_info->queue_groups[i];
> > +
> > + for (path = 0; path < 2; path++) {
> > + spin_lock_irqsave(&queue_group->submit_lock[path],
> > + flags);
> > +
> > + list_for_each_entry_safe(io_request, next,
> > + &queue_group->request_list[path],
> > + request_list_entry) {
> > + scmd = io_request->scmd;
> > + if (scmd) {
> > + device = scmd->device->hostdata;
> > + if (device == device_in_reset) {
> > + set_host_byte(scmd, DID_RESET);
> > + pqi_scsi_done(scmd);
> > + list_del(&io_request->
> > + request_list_entry);
> > + }
> > + }
> > + }
> > +
> > + spin_unlock_irqrestore(&queue_group->submit_lock[path],
> > + flags);
> > + }
>
> If you'd factor the inner for loop into an own small (inline) function, it
> could drastically improve readability here.
>
> something like
>
> static void pqi_complete_queue_group(struct pqi_queue_group *qg, struct
> pqi_device_t *device_in_reset)
> {
> unsigned int path;
> unsigned long flags;
> struct qpi_scsi_dev_t *dev;
> struct pqi_io_request *ior, *next;
>
> for (path = 0; path < 2; path++) {
> spin_lock_irqsave(&qg->submit_lock[path], flags);
>
> list_for_each_entry_save(ior, next, &qg->request_list[path],
> request_list_entry) {
> scmd = ior->scmnd;
> if (!scmd)
> continue;
>
> device = scmnd->device->hostdata;
> if (dev == device_in_reset) {
> set_host_byte(scmnd, DID_RESET);
> pqi_scsi_done(scmnd);
> list_del(&ior->request_list_entry);
> }
> }
> spin_unlock_irqresetore(&qg->submit_lock[path], flags);
> }
> }
>
> > + }
> > +}
> > +
>
> [..]
>
Done
> > +
> > +static DEVICE_ATTR(sas_address, S_IRUGO, pqi_sas_address_show, NULL);
> > +static DEVICE_ATTR(ssd_smart_path_enabled, S_IRUGO,
> > + pqi_ssd_smart_path_enabled_show, NULL);
> > +
> > +static struct device_attribute *pqi_sdev_attrs[] = {
> > + &dev_attr_sas_address,
> > + &dev_attr_ssd_smart_path_enabled,
> > + NULL
> > +};
> > +
> > +static DEVICE_ATTR(rescan, S_IWUSR, NULL, pqi_host_store_rescan);
> > +static DEVICE_ATTR(stats, S_IRUGO, pqi_statistics_show, NULL);
> > +static DEVICE_ATTR(devices, S_IRUGO, pqi_devices_show, NULL);
> > +static DEVICE_ATTR(version, S_IRUGO, pqi_version_show, NULL);
> > +static DEVICE_ATTR(pqi, S_IRUGO, pqi_info_show, NULL);
> > +
> > +static struct device_attribute *pqi_shost_attrs[] = {
> > + &dev_attr_rescan,
> > + &dev_attr_stats,
> > + &dev_attr_devices,
> > + &dev_attr_version,
> > + &dev_attr_pqi,
> > + NULL
> > +};
>
> This should be somewhere near the functions implementing the sysfs show
> callbacks.
>
> > +
> > +static int pqi_change_queue_depth(struct scsi_device *sdev, int qdepth)
> > +{
> > + struct pqi_scsi_dev_t *device = sdev->hostdata;
>
> [...]
>
Done
> --
> Johannes Thumshirn Storage
> jthumshirn@suse.de +49 911 74053 689
> SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
> GF: Felix Imendörffer, Jane Smithard, Graham Norton
> HRB 21284 (AG Nürnberg)
> Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH V3 1/2] smartpqi: initial commit of Microsemi smartpqi driver
2016-06-27 21:12 ` Don Brace
@ 2016-06-28 7:53 ` Johannes Thumshirn
2016-06-30 20:20 ` Don Brace
0 siblings, 1 reply; 7+ messages in thread
From: Johannes Thumshirn @ 2016-06-28 7:53 UTC (permalink / raw)
To: Don Brace
Cc: jejb, Viswas G, Mahesh Rajashekhara, hch, Scott Teel,
Kevin Barnett, Justin Lindley, Scott Benesh, elliott, linux-scsi
On Mon, Jun 27, 2016 at 09:12:11PM +0000, Don Brace wrote:
[...]
> > > ---
> >
> > [...]
> >
> > > + */
> > > +
> > > +#if !defined(_SMARTPQI_H)
> > > +#define _SMARTPQI_H
> > > +
> > > +#pragma pack(1)
> >
> > I know GCC does understand #pragma pack() to be compatible with MSVC
> > but please
> > use the kernel's __packed convention on structs you want to have packed.
> >
>
> We prefer to leave this "as is" for these reasons:
>
> We do not use __packed on other Microsemi Linux drivers.
>
> There's not consistency in the usage of __packed. Just a quick survey of the kernel source reveals at least four styles:
>
So your making a 5th version, c.f. https://xkcd.com/927/
Anyway, a IMHO more important question
> > > +static void pqi_complete_queued_requests(struct pqi_ctrl_info *ctrl_info,
> > > + struct pqi_scsi_dev_t *device_in_reset)
> > > +{
> > > + unsigned int i;
> > > + unsigned int path;
> > > + struct pqi_queue_group *queue_group;
> > > + unsigned long flags;
> > > + struct pqi_io_request *io_request;
> > > + struct pqi_io_request *next;
> > > + struct scsi_cmnd *scmd;
> > > + struct pqi_scsi_dev_t *device;
> > > +
> > > + for (i = 0; i < ctrl_info->num_queue_groups; i++) {
> > > + queue_group = &ctrl_info->queue_groups[i];
> > > +
> > > + for (path = 0; path < 2; path++) {
> > > + spin_lock_irqsave(&queue_group->submit_lock[path],
> > > + flags);
> > > +
> > > + list_for_each_entry_safe(io_request, next,
> > > + &queue_group->request_list[path],
> > > + request_list_entry) {
> > > + scmd = io_request->scmd;
> > > + if (scmd) {
> > > + device = scmd->device->hostdata;
> > > + if (device == device_in_reset) {
> > > + set_host_byte(scmd, DID_RESET);
> > > + pqi_scsi_done(scmd);
> > > + list_del(&io_request->
> > > + request_list_entry);
> > > + }
> > > + }
> > > + }
> > > +
> > > + spin_unlock_irqrestore(&queue_group->submit_lock[path],
> > > + flags);
> > > + }
> >
> > If you'd factor the inner for loop into an own small (inline) function, it
> > could drastically improve readability here.
> >
> > something like
> >
> > static void pqi_complete_queue_group(struct pqi_queue_group *qg, struct
> > pqi_device_t *device_in_reset)
> > {
> > unsigned int path;
> > unsigned long flags;
> > struct qpi_scsi_dev_t *dev;
> > struct pqi_io_request *ior, *next;
> >
> > for (path = 0; path < 2; path++) {
> > spin_lock_irqsave(&qg->submit_lock[path], flags);
> >
> > list_for_each_entry_save(ior, next, &qg->request_list[path],
> > request_list_entry) {
> > scmd = ior->scmnd;
> > if (!scmd)
> > continue;
> >
> > device = scmnd->device->hostdata;
> > if (dev == device_in_reset) {
> > set_host_byte(scmnd, DID_RESET);
> > pqi_scsi_done(scmnd);
> > list_del(&ior->request_list_entry);
> > }
> > }
> > spin_unlock_irqresetore(&qg->submit_lock[path], flags);
> > }
> > }
Does this have to be under a spin_lock and then even the irqsave
variant? From my understanding scsi-mq/blk-mq is supposed to place the
queues per-cpu. So if you're now deactivating local IRQs here you're throwing
all optimizations out of the window. Can't you have the request lists and
queues per-cpu so this code can run lockless?
Thanks,
Johannes
--
Johannes Thumshirn Storage
jthumshirn@suse.de +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
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^ permalink raw reply [flat|nested] 7+ messages in thread
* RE: [PATCH V3 1/2] smartpqi: initial commit of Microsemi smartpqi driver
2016-06-28 7:53 ` Johannes Thumshirn
@ 2016-06-30 20:20 ` Don Brace
0 siblings, 0 replies; 7+ messages in thread
From: Don Brace @ 2016-06-30 20:20 UTC (permalink / raw)
To: Johannes Thumshirn
Cc: jejb, Viswas G, Mahesh Rajashekhara, hch, Scott Teel,
Kevin Barnett, Justin Lindley, Scott Benesh, elliott, linux-scsi
> -----Original Message-----
> From: Johannes Thumshirn [mailto:jthumshirn@suse.de]
> Sent: Tuesday, June 28, 2016 2:54 AM
> To: Don Brace
> Cc: jejb@linux.vnet.ibm.com; Viswas G; Mahesh Rajashekhara;
> hch@infradead.org; Scott Teel; Kevin Barnett; Justin Lindley; Scott Benesh;
> elliott@hpe.com; linux-scsi@vger.kernel.org
> Subject: Re: [PATCH V3 1/2] smartpqi: initial commit of Microsemi smartpqi
> driver
>
> Anyway, a IMHO more important question
>
> > > > +static void pqi_complete_queued_requests(struct pqi_ctrl_info
> *ctrl_info,
> > > > + struct pqi_scsi_dev_t *device_in_reset)
> > > > +{
> > > > + unsigned int i;
> > > > + unsigned int path;
> > > > + struct pqi_queue_group *queue_group;
> > > > + unsigned long flags;
> > > > + struct pqi_io_request *io_request;
> > > > + struct pqi_io_request *next;
> > > > + struct scsi_cmnd *scmd;
> > > > + struct pqi_scsi_dev_t *device;
> > > > +
> > > > + for (i = 0; i < ctrl_info->num_queue_groups; i++) {
> > > > + queue_group = &ctrl_info->queue_groups[i];
> > > > +
> > > > + for (path = 0; path < 2; path++) {
> > > > + spin_lock_irqsave(&queue_group->submit_lock[path],
> > > > + flags);
> > > > +
> > > > + list_for_each_entry_safe(io_request, next,
> > > > + &queue_group->request_list[path],
> > > > + request_list_entry) {
> > > > + scmd = io_request->scmd;
> > > > + if (scmd) {
> > > > + device = scmd->device->hostdata;
> > > > + if (device == device_in_reset) {
> > > > + set_host_byte(scmd, DID_RESET);
> > > > + pqi_scsi_done(scmd);
> > > > + list_del(&io_request->
> > > > + request_list_entry);
> > > > + }
> > > > + }
> > > > + }
> > > > +
> > > > + spin_unlock_irqrestore(&queue_group-
> >submit_lock[path],
> > > > + flags);
> > > > + }
> > >
> > > If you'd factor the inner for loop into an own small (inline) function, it
> > > could drastically improve readability here.
> > >
> > > something like
> > >
> > > static void pqi_complete_queue_group(struct pqi_queue_group *qg,
> struct
> > > pqi_device_t *device_in_reset)
> > > {
> > > unsigned int path;
> > > unsigned long flags;
> > > struct qpi_scsi_dev_t *dev;
> > > struct pqi_io_request *ior, *next;
> > >
> > > for (path = 0; path < 2; path++) {
> > > spin_lock_irqsave(&qg->submit_lock[path], flags);
> > >
> > > list_for_each_entry_save(ior, next, &qg->request_list[path],
> > > request_list_entry) {
> > > scmd = ior->scmnd;
> > > if (!scmd)
> > > continue;
> > >
> > > device = scmnd->device->hostdata;
> > > if (dev == device_in_reset) {
> > > set_host_byte(scmnd, DID_RESET);
> > > pqi_scsi_done(scmnd);
> > > list_del(&ior->request_list_entry);
> > > }
> > > }
> > > spin_unlock_irqresetore(&qg->submit_lock[path], flags);
> > > }
> > > }
>
> Does this have to be under a spin_lock and then even the irqsave
> variant? From my understanding scsi-mq/blk-mq is supposed to place the
> queues per-cpu. So if you're now deactivating local IRQs here you're
> throwing
> all optimizations out of the window. Can't you have the request lists and
> queues per-cpu so this code can run lockless?
>
> Thanks,
> Johannes
>
The current version was developed on older kernels which did not have
scsi-mq enabled. We plan on fully supporting scsi-mq in the near
future, but would like to keep the kernel.org and internal versions
the same for now.
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2016-06-30 20:37 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-06-16 22:48 [PATCH V3 0/2] initial submit of Microsemi smarpqi driver Don Brace
2016-06-16 22:48 ` [PATCH V3 1/2] smartpqi: initial commit of Microsemi smartpqi driver Don Brace
2016-06-17 9:57 ` Johannes Thumshirn
2016-06-27 21:12 ` Don Brace
2016-06-28 7:53 ` Johannes Thumshirn
2016-06-30 20:20 ` Don Brace
2016-06-16 22:48 ` [PATCH V3 2/2] aacraid: remove wildcard for series 9 controllers Don Brace
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