* [RFC][PATCH 1/6] fnic: add main file with module infrastructure, fnic structure, Makefile
2009-02-28 2:31 [PATCH 0/6] FCoE HBA Driver (fnic) for 2.6.30 feature window Abhijeet Joglekar
@ 2009-02-28 2:31 ` Abhijeet Joglekar
2009-03-12 20:13 ` Mike Christie
2009-02-28 2:32 ` [RFC][PATCH 2/6] fnic: add SCSI FCP handling Abhijeet Joglekar
` (4 subsequent siblings)
5 siblings, 1 reply; 13+ messages in thread
From: Abhijeet Joglekar @ 2009-02-28 2:31 UTC (permalink / raw)
To: james.bottomley, linux-scsi; +Cc: abjoglek, jeykholt
fnic: add main file with module infrastructure, fnic structure, Makefile
fnic_main.c: includes module load and unload, PCI device probe, scsi-ml,
libFC, and scsi-transport-fc registration and interfaces
fnic.h: has the fnic definition and other related data types
Makefile:
Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com>
---
drivers/scsi/fnic/Makefile | 15 +
drivers/scsi/fnic/fnic.h | 283 ++++++++++++
drivers/scsi/fnic/fnic_main.c | 998 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 1296 insertions(+), 0 deletions(-)
create mode 100644 drivers/scsi/fnic/Makefile
create mode 100644 drivers/scsi/fnic/fnic.h
create mode 100644 drivers/scsi/fnic/fnic_main.c
diff --git a/drivers/scsi/fnic/Makefile b/drivers/scsi/fnic/Makefile
new file mode 100644
index 0000000..37c3440
--- /dev/null
+++ b/drivers/scsi/fnic/Makefile
@@ -0,0 +1,15 @@
+obj-$(CONFIG_FCOE_FNIC) += fnic.o
+
+fnic-y := \
+ fnic_attrs.o \
+ fnic_isr.o \
+ fnic_main.o \
+ fnic_res.o \
+ fnic_fcs.o \
+ fnic_scsi.o \
+ vnic_cq.o \
+ vnic_dev.o \
+ vnic_intr.o \
+ vnic_rq.o \
+ vnic_wq_copy.o \
+ vnic_wq.o
diff --git a/drivers/scsi/fnic/fnic.h b/drivers/scsi/fnic/fnic.h
new file mode 100644
index 0000000..e76fb35
--- /dev/null
+++ b/drivers/scsi/fnic/fnic.h
@@ -0,0 +1,283 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _FNIC_H_
+#define _FNIC_H_
+
+#include <linux/mempool.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/workqueue.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_transport_fc.h>
+#include <scsi/libfc.h>
+#include "fnic_io.h"
+#include "fnic_res.h"
+#include "vnic_dev.h"
+#include "vnic_wq.h"
+#include "vnic_rq.h"
+#include "vnic_cq.h"
+#include "vnic_wq_copy.h"
+#include "vnic_intr.h"
+#include "vnic_stats.h"
+#include "vnic_scsi.h"
+
+#define DRV_NAME "fnic"
+#define DRV_DESCRIPTION "Cisco FCoE HBA Driver"
+#define DRV_VERSION "1.0.0"
+#define PFX DRV_NAME ": "
+#define DFX DRV_NAME "%d: "
+
+#define vnic_fc_config vnic_scsi_config
+
+#define DESC_CLEAN_LOW_WATERMARK 8
+#define FNIC_MAX_IO_REQ 2048 /* scsi_cmnd tag map entries */
+#define FNIC_IO_LOCKS 64 /* IO locks: power of 2 */
+#define FNIC_DFLT_QUEUE_DEPTH 32
+#define FNIC_STATS_RATE_LIMIT 4 /* limit rate at which stats are pulled up */
+
+/*
+ * Tag bits used for special requests.
+ */
+#define BIT(nr) (1UL << (nr))
+#define FNIC_TAG_ABORT BIT(30) /* tag bit indicating abort */
+#define FNIC_TAG_DEV_RST BIT(29) /* indicates device reset */
+#define FNIC_TAG_MASK (BIT(24) - 1) /* mask for lookup */
+#define FNIC_NO_TAG -1
+
+/*
+ * Usage of the scsi_cmnd scratchpad.
+ * These fields are locked by the hashed io_req_lock.
+ */
+#define CMD_SP(Cmnd) ((Cmnd)->SCp.ptr)
+#define CMD_STATE(Cmnd) ((Cmnd)->SCp.phase)
+#define CMD_ABTS_STATUS(Cmnd) ((Cmnd)->SCp.Message)
+#define CMD_LR_STATUS(Cmnd) ((Cmnd)->SCp.have_data_in)
+#define CMD_TAG(Cmnd) ((Cmnd)->SCp.sent_command)
+
+#define FCPIO_INVALID_CODE 0x100 /* hdr_status value unused by firmware */
+
+#define FNIC_LUN_RESET_TIMEOUT 10000 /* mSec */
+#define FNIC_HOST_RESET_TIMEOUT 10000 /* mSec */
+#define FNIC_RMDEVICE_TIMEOUT 1000 /* mSec */
+#define FNIC_HOST_RESET_SETTLE_TIME 30 /* Sec */
+
+#define FNIC_MAX_LUN 1023
+#define FNIC_MAX_FCP_TARGET 256
+
+extern unsigned int fnic_log_level;
+
+#define FNIC_MAIN_LOGGING 0x01
+#define FNIC_FCS_LOGGING 0x02
+#define FNIC_SCSI_LOGGING 0x04
+#define FNIC_ISR_LOGGING 0x08
+
+#define FNIC_CHECK_LOGGING(LEVEL, CMD) \
+do { \
+ if (unlikely(fnic_log_level & LEVEL)) \
+ do { \
+ CMD; \
+ } while (0); \
+} while (0)
+
+#define FNIC_MAIN_DBG(kern_level, fmt, args...) \
+ FNIC_CHECK_LOGGING(FNIC_MAIN_LOGGING, \
+ printk(kern_level fmt, ##args);)
+
+#define FNIC_FCS_DBG(kern_level, fmt, args...) \
+ FNIC_CHECK_LOGGING(FNIC_FCS_LOGGING, \
+ printk(kern_level fmt, ##args);)
+
+#define FNIC_SCSI_DBG(kern_level, fmt, args...) \
+ FNIC_CHECK_LOGGING(FNIC_SCSI_LOGGING, \
+ printk(kern_level fmt, ##args);)
+
+#define FNIC_ISR_DBG(kern_level, fmt, args...) \
+ FNIC_CHECK_LOGGING(FNIC_ISR_LOGGING, \
+ printk(kern_level fmt, ##args);)
+
+extern const char *fnic_state_str[];
+
+enum fnic_intx_intr_index {
+ FNIC_INTX_WQ_RQ_COPYWQ,
+ FNIC_INTX_ERR,
+ FNIC_INTX_NOTIFY,
+ FNIC_INTX_INTR_MAX,
+};
+
+enum fnic_msix_intr_index {
+ FNIC_MSIX_RQ,
+ FNIC_MSIX_WQ,
+ FNIC_MSIX_WQ_COPY,
+ FNIC_MSIX_ERR_NOTIFY,
+ FNIC_MSIX_INTR_MAX,
+};
+
+struct fnic_msix_entry {
+ int requested;
+ char devname[IFNAMSIZ];
+ irqreturn_t (*isr)(int, void *);
+ void *devid;
+};
+
+enum fnic_state {
+ FNIC_IN_FC_MODE = 0,
+ FNIC_IN_FC_TRANS_ETH_MODE,
+ FNIC_IN_ETH_MODE,
+ FNIC_IN_ETH_TRANS_FC_MODE,
+};
+
+#define FNIC_WQ_COPY_MAX 1
+#define FNIC_WQ_MAX 1
+#define FNIC_RQ_MAX 1
+#define FNIC_CQ_MAX (FNIC_WQ_COPY_MAX + FNIC_WQ_MAX + FNIC_RQ_MAX)
+
+/* Per-instance private data structure */
+struct fnic {
+ struct fc_lport *lport;
+ struct vnic_dev_bar bar0;
+
+ struct msix_entry msix_entry[FNIC_MSIX_INTR_MAX];
+ struct fnic_msix_entry msix[FNIC_MSIX_INTR_MAX];
+
+ struct vnic_stats *stats;
+ unsigned long stats_time; /* time of stats update */
+ struct vnic_nic_cfg *nic_cfg;
+ char name[IFNAMSIZ];
+ u32 fnic_no;
+ struct timer_list notify_timer; /* used for MSI interrupts */
+
+ unsigned int err_intr_offset;
+ unsigned int link_intr_offset;
+
+ unsigned int wq_count;
+ unsigned int cq_count;
+
+ u32 fcoui_mode:1; /* use fcoui address*/
+ u32 vlan_hw_insert:1; /* let hw insert the tag */
+ u32 in_remove:1; /* fnic device in removal */
+ u32 stop_rx_link_events:1; /* stop proc. rx frames, link events */
+
+ struct completion *remove_wait; /* device remove thread blocks */
+
+ struct fc_frame *flogi;
+ struct fc_frame *flogi_resp;
+ u16 flogi_oxid;
+ unsigned long s_id;
+ enum fnic_state state;
+ spinlock_t fnic_lock;
+
+ u16 vlan_id; /* VLAN tag including priority */
+ u8 mac_addr[ETH_ALEN];
+ u8 dest_addr[ETH_ALEN];
+ u8 data_src_addr[ETH_ALEN];
+ u64 fcp_input_bytes; /* internal statistic */
+ u64 fcp_output_bytes; /* internal statistic */
+ int event_count; /* number of events queued in workq */
+
+ struct list_head list;
+ struct pci_dev *pdev;
+ struct vnic_fc_config config;
+ struct vnic_dev *vdev;
+ unsigned int raw_wq_count;
+ unsigned int wq_copy_count;
+ unsigned int rq_count;
+ int fw_ack_index[FNIC_WQ_COPY_MAX];
+ unsigned short fw_ack_recd[FNIC_WQ_COPY_MAX];
+ unsigned short wq_copy_desc_low[FNIC_WQ_COPY_MAX];
+ unsigned int intr_count;
+ u32 __iomem *legacy_pba;
+ struct fnic_host_tag *tags;
+ mempool_t *io_req_pool;
+ mempool_t *io_sgl_pool[FNIC_SGL_NUM_CACHES];
+ spinlock_t io_req_lock[FNIC_IO_LOCKS]; /* locks for scsi cmnds */
+
+ /* copy work queue cache line section */
+ ____cacheline_aligned struct vnic_wq_copy wq_copy[FNIC_WQ_COPY_MAX];
+ /* completion queue cache line section */
+ ____cacheline_aligned struct vnic_cq cq[FNIC_CQ_MAX];
+
+ spinlock_t wq_copy_lock[FNIC_WQ_COPY_MAX];
+
+ /* work queue cache line section */
+ ____cacheline_aligned struct vnic_wq wq[FNIC_WQ_MAX];
+ spinlock_t wq_lock[FNIC_WQ_MAX];
+
+ /* receive queue cache line section */
+ ____cacheline_aligned struct vnic_rq rq[FNIC_RQ_MAX];
+
+ /* interrupt resource cache line section */
+ ____cacheline_aligned struct vnic_intr intr[FNIC_MSIX_INTR_MAX];
+};
+
+/*
+ * This is used to pass incoming frames, link notifications from ISR
+ * to fnic workQ which passes it to libFC
+ */
+enum fnic_thread_event_type {
+ EV_TYPE_LINK_DOWN = 0,
+ EV_TYPE_LINK_UP,
+ EV_TYPE_FRAME,
+};
+
+struct fnic_event {
+ struct fc_frame *fp;
+ struct fnic *fnic;
+ enum fnic_thread_event_type ev_type;
+ u32 is_flogi_resp_frame:1;
+ struct work_struct event_work;
+};
+
+extern struct workqueue_struct *fnic_event_queue;
+extern struct kmem_cache *fnic_ev_cache;
+extern struct device_attribute *fnic_attrs[];
+
+void fnic_clear_intr_mode(struct fnic *fnic);
+int fnic_set_intr_mode(struct fnic *fnic);
+void fnic_free_intr(struct fnic *fnic);
+int fnic_request_intr(struct fnic *fnic);
+
+int fnic_send(struct fc_lport *, struct fc_frame *);
+void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf);
+void fnic_event_work(struct work_struct *work);
+int fnic_rq_cmpl_handler(struct fnic *fnic, int);
+int fnic_alloc_rq_frame(struct vnic_rq *rq);
+void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf);
+int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp);
+
+int fnic_queuecommand(struct scsi_cmnd *, void (*done)(struct scsi_cmnd *));
+int fnic_abort_cmd(struct scsi_cmnd *);
+int fnic_device_reset(struct scsi_cmnd *);
+int fnic_host_reset(struct scsi_cmnd *);
+int fnic_reset(struct Scsi_Host *);
+void fnic_scsi_cleanup(struct fc_lport *);
+void fnic_scsi_abort_io(struct fc_lport *);
+void fnic_empty_scsi_cleanup(struct fc_lport *);
+void fnic_exch_mgr_reset(struct fc_lport *, u32, u32);
+int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int);
+int fnic_wq_cmpl_handler(struct fnic *fnic, int);
+int fnic_flogi_reg_handler(struct fnic *fnic);
+void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
+ struct fcpio_host_req *desc);
+int fnic_fw_reset_handler(struct fnic *fnic);
+void fnic_terminate_rport_io(struct fc_rport *);
+const char *fnic_state_to_str(unsigned int state);
+
+void fnic_log_q_error(struct fnic *fnic);
+void fnic_handle_link_event(struct fnic *fnic);
+
+#endif /* _FNIC_H_ */
diff --git a/drivers/scsi/fnic/fnic_main.c b/drivers/scsi/fnic/fnic_main.c
new file mode 100644
index 0000000..6680195
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_main.c
@@ -0,0 +1,998 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/skbuff.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+#include <linux/math64.h>
+#include <linux/delay.h>
+#include <asm/atomic.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_fc.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/libfc.h>
+#include <scsi/fc_frame.h>
+
+#include "vnic_dev.h"
+#include "vnic_intr.h"
+#include "vnic_stats.h"
+#include "fnic_io.h"
+#include "fnic.h"
+
+#define PCI_DEVICE_ID_CISCO_FNIC 0x0045
+
+/* Timer to poll notification area for events. Used for MSI interrupts */
+#define FNIC_NOTIFY_TIMER_PERIOD (2 * HZ)
+
+/* Cache to pass events from ISR to fnic work queue */
+struct kmem_cache *fnic_ev_cache;
+static struct kmem_cache *fnic_sgl_cache[FNIC_SGL_NUM_CACHES];
+static struct kmem_cache *fnic_io_req_cache;
+static atomic_t fnic_no;
+LIST_HEAD(fnic_list);
+DEFINE_SPINLOCK(fnic_list_lock);
+
+/* Supported devices by fnic module */
+static struct pci_device_id fnic_id_table[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_FNIC) },
+ { 0, }
+};
+
+MODULE_DESCRIPTION(DRV_DESCRIPTION);
+MODULE_AUTHOR("Abhijeet Joglekar <abjoglek@cisco.com>, "
+ "Joseph R. Eykholt <jeykholt@cisco.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_VERSION(DRV_VERSION);
+MODULE_DEVICE_TABLE(pci, fnic_id_table);
+
+unsigned int fnic_log_level;
+module_param(fnic_log_level, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(fnic_log_level, "bit mask of fnic logging levels");
+
+
+static struct libfc_function_template fnic_transport_template = {
+ .frame_send = fnic_send,
+ .fcp_abort_io = fnic_empty_scsi_cleanup,
+ .fcp_cleanup = fnic_empty_scsi_cleanup,
+ .exch_mgr_reset = fnic_exch_mgr_reset
+};
+
+static int fnic_slave_alloc(struct scsi_device *sdev)
+{
+ struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
+ struct fc_lport *lp = shost_priv(sdev->host);
+ struct fnic *fnic = lport_priv(lp);
+
+ sdev->tagged_supported = 1;
+
+ if (!rport || fc_remote_port_chkready(rport))
+ return -ENXIO;
+
+ scsi_activate_tcq(sdev, FNIC_DFLT_QUEUE_DEPTH);
+ rport->dev_loss_tmo = fnic->config.port_down_timeout / 1000;
+
+ return 0;
+}
+
+static struct scsi_host_template fnic_host_template = {
+ .module = THIS_MODULE,
+ .name = DRV_NAME,
+ .queuecommand = fnic_queuecommand,
+ .eh_abort_handler = fnic_abort_cmd,
+ .eh_device_reset_handler = fnic_device_reset,
+ .eh_host_reset_handler = fnic_host_reset,
+ .slave_alloc = fnic_slave_alloc,
+ .change_queue_depth = fc_change_queue_depth,
+ .change_queue_type = fc_change_queue_type,
+ .this_id = -1,
+ .cmd_per_lun = 3,
+ .can_queue = FNIC_MAX_IO_REQ,
+ .use_clustering = ENABLE_CLUSTERING,
+ .sg_tablesize = FNIC_MAX_SG_DESC_CNT,
+ .max_sectors = 0xffff,
+ .shost_attrs = fnic_attrs,
+};
+
+static void fnic_get_host_speed(struct Scsi_Host *shost);
+static struct scsi_transport_template *fnic_fc_transport;
+static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *);
+
+static struct fc_function_template fnic_fc_functions = {
+
+ .show_host_node_name = 1,
+ .show_host_port_name = 1,
+ .show_host_supported_classes = 1,
+ .show_host_supported_fc4s = 1,
+ .show_host_active_fc4s = 1,
+ .show_host_maxframe_size = 1,
+ .show_host_port_id = 1,
+ .show_host_supported_speeds = 1,
+ .get_host_speed = fnic_get_host_speed,
+ .show_host_speed = 1,
+ .show_host_port_type = 1,
+ .get_host_port_state = fc_get_host_port_state,
+ .show_host_port_state = 1,
+ .show_host_symbolic_name = 1,
+ .show_rport_maxframe_size = 1,
+ .show_rport_supported_classes = 1,
+ .show_host_fabric_name = 1,
+ .show_starget_node_name = 1,
+ .show_starget_port_name = 1,
+ .show_starget_port_id = 1,
+ .show_rport_dev_loss_tmo = 1,
+ .issue_fc_host_lip = fnic_reset,
+ .get_fc_host_stats = fnic_get_stats,
+ .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
+ .terminate_rport_io = fnic_terminate_rport_io,
+};
+
+static void fnic_get_host_speed(struct Scsi_Host *shost)
+{
+ struct fc_lport *lp = shost_priv(shost);
+ struct fnic *fnic = lport_priv(lp);
+ u32 port_speed = vnic_dev_port_speed(fnic->vdev);
+
+ /* Add in other values as they get defined in fw */
+ switch (port_speed) {
+ case 10000:
+ fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
+ break;
+ default:
+ fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
+ break;
+ }
+}
+
+static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host)
+{
+ int ret;
+ struct fc_lport *lp = shost_priv(host);
+ struct fnic *fnic = lport_priv(lp);
+ struct fc_host_statistics *stats = &lp->host_stats;
+ struct vnic_stats *vs;
+ unsigned long flags;
+
+ if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT))
+ return stats;
+ fnic->stats_time = jiffies;
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ if (ret) {
+ FNIC_MAIN_DBG(KERN_DEBUG, DFX "fnic: Get vnic stats failed"
+ " 0x%x", fnic->fnic_no, ret);
+ return stats;
+ }
+ vs = fnic->stats;
+ stats->tx_frames = vs->tx.tx_unicast_frames_ok;
+ stats->tx_words = vs->tx.tx_unicast_bytes_ok / 4;
+ stats->rx_frames = vs->rx.rx_unicast_frames_ok;
+ stats->rx_words = vs->rx.rx_unicast_bytes_ok / 4;
+ stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors;
+ stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop;
+ stats->invalid_crc_count = vs->rx.rx_crc_errors;
+ stats->seconds_since_last_reset = (jiffies - lp->boot_time) / HZ;
+ stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000);
+ stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000);
+
+ return stats;
+}
+
+void fnic_log_q_error(struct fnic *fnic)
+{
+ unsigned int i;
+ u32 error_status;
+
+ for (i = 0; i < fnic->raw_wq_count; i++) {
+ error_status = ioread32(&fnic->wq[i].ctrl->error_status);
+ if (error_status)
+ printk(KERN_ERR DFX "WQ[%d] error_status"
+ " %d\n", fnic->fnic_no, i, error_status);
+ }
+
+ for (i = 0; i < fnic->rq_count; i++) {
+ error_status = ioread32(&fnic->rq[i].ctrl->error_status);
+ if (error_status)
+ printk(KERN_ERR DFX "RQ[%d] error_status"
+ " %d\n", fnic->fnic_no, i, error_status);
+ }
+
+ for (i = 0; i < fnic->wq_copy_count; i++) {
+ error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status);
+ if (error_status)
+ printk(KERN_ERR DFX "CWQ[%d] error_status"
+ " %d\n", fnic->fnic_no, i, error_status);
+ }
+}
+
+void fnic_handle_link_event(struct fnic *fnic)
+{
+ int link_status = vnic_dev_link_status(fnic->vdev);
+ struct fnic_event *event;
+ unsigned long flags;
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ if (fnic->stop_rx_link_events) {
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ return;
+ }
+
+ FNIC_MAIN_DBG(KERN_DEBUG, DFX "link %s\n", fnic->fnic_no,
+ (link_status ? "up" : "down"));
+
+ event = kmem_cache_alloc(fnic_ev_cache, GFP_ATOMIC);
+ if (!event) {
+ FNIC_MAIN_DBG(KERN_DEBUG, DFX "Cannot allocate a event, "
+ "cannot indicate link event to FCS\n",
+ fnic->fnic_no);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ return;
+ }
+
+ /* Queue the link event in fnic workQ */
+ memset(event, 0, sizeof(struct fnic_event));
+ event->fnic = fnic;
+ event->ev_type = EV_TYPE_LINK_UP;
+ if (!link_status) {
+ event->ev_type = EV_TYPE_LINK_DOWN;
+ fnic->lport->host_stats.link_failure_count++;
+ }
+ fnic->event_count++;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ INIT_WORK(&event->event_work, fnic_event_work);
+ queue_work(fnic_event_queue, &event->event_work);
+
+}
+
+static int fnic_notify_set(struct fnic *fnic)
+{
+ int err;
+
+ switch (vnic_dev_get_intr_mode(fnic->vdev)) {
+ case VNIC_DEV_INTR_MODE_INTX:
+ err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY);
+ break;
+ case VNIC_DEV_INTR_MODE_MSI:
+ err = vnic_dev_notify_set(fnic->vdev, -1);
+ break;
+ case VNIC_DEV_INTR_MODE_MSIX:
+ err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY);
+ break;
+ default:
+ printk(KERN_ERR DFX "Interrupt mode should be set up"
+ " before devcmd notify set %d\n", fnic->fnic_no,
+ vnic_dev_get_intr_mode(fnic->vdev));
+ err = -1;
+ break;
+ }
+
+ return err;
+}
+
+static void fnic_notify_timer(unsigned long data)
+{
+ struct fnic *fnic = (struct fnic *)data;
+
+ fnic_handle_link_event(fnic);
+ mod_timer(&fnic->notify_timer,
+ round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));
+}
+
+static void fnic_notify_timer_start(struct fnic *fnic)
+{
+ switch (vnic_dev_get_intr_mode(fnic->vdev)) {
+ case VNIC_DEV_INTR_MODE_MSI:
+ /*
+ * Schedule first timeout immediately. The driver is
+ * initiatialized and ready to look for link up notification
+ */
+ mod_timer(&fnic->notify_timer, jiffies);
+ break;
+ default:
+ /* Using intr for notification for INTx/MSI-X */
+ break;
+ };
+}
+
+static int fnic_dev_wait(struct vnic_dev *vdev,
+ int (*start)(struct vnic_dev *, int),
+ int (*finished)(struct vnic_dev *, int *),
+ int arg)
+{
+ unsigned long time;
+ int done;
+ int err;
+
+ err = start(vdev, arg);
+ if (err)
+ return err;
+
+ /* Wait for func to complete...2 seconds max */
+ time = jiffies + (HZ * 2);
+ do {
+ err = finished(vdev, &done);
+ if (err)
+ return err;
+ if (done)
+ return 0;
+ schedule_timeout_uninterruptible(HZ / 10);
+ } while (time_after(time, jiffies));
+
+ return -ETIMEDOUT;
+}
+
+static int fnic_cleanup(struct fnic *fnic)
+{
+ unsigned int i;
+ int err;
+ unsigned long flags;
+ struct fc_frame *flogi = NULL;
+ struct fc_frame *flogi_resp = NULL;
+
+ del_timer_sync(&fnic->notify_timer);
+
+ vnic_dev_disable(fnic->vdev);
+ for (i = 0; i < fnic->intr_count; i++)
+ vnic_intr_mask(&fnic->intr[i]);
+
+ for (i = 0; i < fnic->rq_count; i++) {
+ err = vnic_rq_disable(&fnic->rq[i]);
+ if (err)
+ return err;
+ }
+ for (i = 0; i < fnic->raw_wq_count; i++) {
+ err = vnic_wq_disable(&fnic->wq[i]);
+ if (err)
+ return err;
+ }
+ for (i = 0; i < fnic->wq_copy_count; i++) {
+ err = vnic_wq_copy_disable(&fnic->wq_copy[i]);
+ if (err)
+ return err;
+ }
+
+ /* Clean up completed IOs and FCS frames */
+ fnic_wq_copy_cmpl_handler(fnic, -1);
+ fnic_wq_cmpl_handler(fnic, -1);
+ fnic_rq_cmpl_handler(fnic, -1);
+
+ /* Clean up the IOs and FCS frames that have not completed */
+ for (i = 0; i < fnic->raw_wq_count; i++)
+ vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf);
+ for (i = 0; i < fnic->rq_count; i++)
+ vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
+ for (i = 0; i < fnic->wq_copy_count; i++)
+ vnic_wq_copy_clean(&fnic->wq_copy[i],
+ fnic_wq_copy_cleanup_handler);
+
+ for (i = 0; i < fnic->cq_count; i++)
+ vnic_cq_clean(&fnic->cq[i]);
+ for (i = 0; i < fnic->intr_count; i++)
+ vnic_intr_clean(&fnic->intr[i]);
+
+ /*
+ * Remove cached flogi and flogi resp frames if any
+ * These frames are not in any queue, and therefore queue
+ * cleanup does not clean them. So clean them explicitly
+ */
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ flogi = fnic->flogi;
+ fnic->flogi = NULL;
+ flogi_resp = fnic->flogi_resp;
+ fnic->flogi_resp = NULL;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ if (flogi)
+ dev_kfree_skb(fp_skb(flogi));
+
+ if (flogi_resp)
+ dev_kfree_skb(fp_skb(flogi_resp));
+
+ mempool_destroy(fnic->io_req_pool);
+ for (i = 0; i < FNIC_SGL_NUM_CACHES; i++)
+ mempool_destroy(fnic->io_sgl_pool[i]);
+
+ return 0;
+}
+
+static void fnic_iounmap(struct fnic *fnic)
+{
+ if (fnic->bar0.vaddr)
+ iounmap(fnic->bar0.vaddr);
+}
+
+/*
+ * Allocate element for mempools requiring GFP_DMA flag.
+ * Otherwise, checks in kmem_flagcheck() hit BUG_ON().
+ */
+static void *fnic_alloc_slab_dma(gfp_t gfp_mask, void *pool_data)
+{
+ struct kmem_cache *mem = pool_data;
+
+ return kmem_cache_alloc(mem, gfp_mask | GFP_ATOMIC | GFP_DMA);
+}
+
+static int __devinit fnic_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct Scsi_Host *host;
+ struct fc_lport *lp;
+ struct fnic *fnic;
+ mempool_t *pool;
+ int err;
+ int i;
+ unsigned long flags;
+
+ /*
+ * Allocate SCSI Host and set up association between host,
+ * local port, and fnic
+ */
+ host = scsi_host_alloc(&fnic_host_template,
+ sizeof(struct fc_lport) + sizeof(struct fnic));
+ if (!host) {
+ printk(KERN_ERR PFX "Unable to alloc SCSI host\n");
+ err = -ENOMEM;
+ goto err_out;
+ }
+ lp = shost_priv(host);
+ lp->host = host;
+ fnic = lport_priv(lp);
+ fnic->lport = lp;
+
+ /* fnic number starts from 0 onwards */
+ fnic->fnic_no = atomic_add_return(1, &fnic_no);
+ snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME,
+ fnic->fnic_no);
+
+ host->transportt = fnic_fc_transport;
+
+ err = scsi_init_shared_tag_map(host, FNIC_MAX_IO_REQ);
+ if (err) {
+ printk(KERN_ERR PFX "Unable to alloc shared tag map\n");
+ goto err_out_free_hba;
+ }
+
+ /* Setup PCI resources */
+ pci_set_drvdata(pdev, fnic);
+
+ fnic->pdev = pdev;
+
+ err = pci_enable_device(pdev);
+ if (err) {
+ printk(KERN_ERR DFX "Cannot enable PCI device, aborting.\n",
+ fnic->fnic_no);
+ goto err_out_free_hba;
+ }
+
+ err = pci_request_regions(pdev, DRV_NAME);
+ if (err) {
+ printk(KERN_ERR DFX "Cannot enable PCI resources, aborting\n",
+ fnic->fnic_no);
+ goto err_out_disable_device;
+ }
+
+ pci_set_master(pdev);
+
+ /* Query PCI controller on system for DMA addressing
+ * limitation for the device. Try 40-bit first, and
+ * fail to 32-bit.
+ */
+ err = pci_set_dma_mask(pdev, DMA_40BIT_MASK);
+ if (err) {
+ err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
+ if (err) {
+ printk(KERN_ERR DFX "No usable DMA configuration "
+ "aborting\n", fnic->fnic_no);
+ goto err_out_release_regions;
+ }
+ err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
+ if (err) {
+ printk(KERN_ERR DFX "Unable to obtain 32-bit DMA "
+ "for consistent allocations, aborting.\n",
+ fnic->fnic_no);
+ goto err_out_release_regions;
+ }
+ } else {
+ err = pci_set_consistent_dma_mask(pdev, DMA_40BIT_MASK);
+ if (err) {
+ printk(KERN_ERR DFX "Unable to obtain 40-bit DMA "
+ "for consistent allocations, aborting.\n",
+ fnic->fnic_no);
+ goto err_out_release_regions;
+ }
+ }
+
+ /* Map vNIC resources from BAR0 */
+ if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
+ printk(KERN_ERR DFX "BAR0 not memory-map'able, aborting.\n",
+ fnic->fnic_no);
+ err = -ENODEV;
+ goto err_out_release_regions;
+ }
+
+ fnic->bar0.vaddr = pci_iomap(pdev, 0, 0);
+ fnic->bar0.bus_addr = pci_resource_start(pdev, 0);
+ fnic->bar0.len = pci_resource_len(pdev, 0);
+
+ if (!fnic->bar0.vaddr) {
+ printk(KERN_ERR DFX "Cannot memory-map BAR0 res hdr, "
+ "aborting.\n", fnic->fnic_no);
+ err = -ENODEV;
+ goto err_out_release_regions;
+ }
+
+ fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0);
+ if (!fnic->vdev) {
+ printk(KERN_ERR DFX "vNIC registration failed, "
+ "aborting.\n", fnic->fnic_no);
+ err = -ENODEV;
+ goto err_out_iounmap;
+ }
+
+ err = fnic_dev_wait(fnic->vdev, vnic_dev_open,
+ vnic_dev_open_done, 0);
+ if (err) {
+ printk(KERN_ERR DFX
+ "vNIC dev open failed, aborting.\n", fnic->fnic_no);
+ goto err_out_vnic_unregister;
+ }
+
+ err = vnic_dev_init(fnic->vdev, 0);
+ if (err) {
+ printk(KERN_ERR DFX
+ "vNIC dev init failed, aborting.\n", fnic->fnic_no);
+ goto err_out_dev_close;
+ }
+
+ err = vnic_dev_mac_addr(fnic->vdev, fnic->mac_addr);
+ if (err) {
+ printk(KERN_ERR DFX "vNIC get MAC addr failed \n",
+ fnic->fnic_no);
+ goto err_out_dev_close;
+ }
+
+ /* Get vNIC configuration */
+ err = fnic_get_vnic_config(fnic);
+ if (err) {
+ printk(KERN_ERR DFX "Get vNIC configuration failed, "
+ "aborting.\n", fnic->fnic_no);
+ goto err_out_dev_close;
+ }
+ host->max_lun = fnic->config.luns_per_tgt;
+ host->max_id = FNIC_MAX_FCP_TARGET;
+
+ fnic_get_res_counts(fnic);
+
+ err = fnic_set_intr_mode(fnic);
+ if (err) {
+ printk(KERN_ERR DFX "Failed to set intr mode, "
+ "aborting.\n", fnic->fnic_no);
+ goto err_out_dev_close;
+ }
+
+ err = fnic_request_intr(fnic);
+ if (err) {
+ printk(KERN_ERR DFX "Unable to request irq.\n", fnic->fnic_no);
+ goto err_out_clear_intr;
+ }
+
+ err = fnic_alloc_vnic_resources(fnic);
+ if (err) {
+ printk(KERN_ERR DFX "Failed to alloc vNIC resources, "
+ "aborting.\n", fnic->fnic_no);
+ goto err_out_free_intr;
+ }
+
+
+ /* initialize all fnic locks */
+ spin_lock_init(&fnic->fnic_lock);
+
+ for (i = 0; i < FNIC_WQ_MAX; i++)
+ spin_lock_init(&fnic->wq_lock[i]);
+
+ for (i = 0; i < FNIC_WQ_COPY_MAX; i++) {
+ spin_lock_init(&fnic->wq_copy_lock[i]);
+ fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK;
+ fnic->fw_ack_recd[i] = 0;
+ fnic->fw_ack_index[i] = -1;
+ }
+
+ for (i = 0; i < FNIC_IO_LOCKS; i++)
+ spin_lock_init(&fnic->io_req_lock[i]);
+
+ fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache);
+ if (!fnic->io_req_pool)
+ goto err_out_free_resources;
+
+ pool = mempool_create(2, fnic_alloc_slab_dma, mempool_free_slab,
+ (void *)fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
+ if (!pool)
+ goto err_out_free_ioreq_pool;
+ fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool;
+
+ pool = mempool_create(2, fnic_alloc_slab_dma, mempool_free_slab,
+ (void *)fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
+ if (!pool)
+ goto err_out_free_dflt_pool;
+ fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool;
+
+ /* setup vlan config, hw inserts vlan header */
+ fnic->vlan_hw_insert = 1;
+ fnic->vlan_id = 0;
+
+ fnic->flogi_oxid = FC_XID_UNKNOWN;
+ fnic->flogi = NULL;
+ fnic->flogi_resp = NULL;
+ fnic->state = FNIC_IN_FC_MODE;
+
+ /* Enable hardware stripping of vlan header on ingress */
+ fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1);
+
+ /* Setup notification buffer area */
+ err = fnic_notify_set(fnic);
+ if (err) {
+ printk(KERN_ERR DFX
+ "Failed to alloc notify buffer, aborting.\n",
+ fnic->fnic_no);
+ goto err_out_free_max_pool;
+ }
+
+ /* Setup notify timer when using MSI interrupts */
+ setup_timer(&fnic->notify_timer,
+ fnic_notify_timer, (unsigned long)fnic);
+
+ FNIC_MAIN_DBG(KERN_DEBUG, DFX "host no %d\n",
+ fnic->fnic_no, host->host_no);
+
+ /* allocate RQ buffers and post them to RQ*/
+ for (i = 0; i < fnic->rq_count; i++) {
+ err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
+ if (err) {
+ printk(KERN_ERR DFX "fnic_alloc_rq_frame can't alloc "
+ "frame\n", fnic->fnic_no);
+ goto err_out_free_rq_buf;
+ }
+ }
+
+ /*
+ * Initialization done with PCI system, hardware, firmware.
+ * Add host to SCSI
+ */
+ err = scsi_add_host(lp->host, &pdev->dev);
+ if (err) {
+ printk(KERN_ERR DFX "fnic: scsi_add_host failed...exiting\n",
+ fnic->fnic_no);
+ goto err_out_free_rq_buf;
+ }
+
+ /* Start local port initiatialization */
+
+ lp->link_up = 0;
+ lp->tt = fnic_transport_template;
+
+ lp->emp = fc_exch_mgr_alloc(lp, FC_CLASS_3,
+ FCPIO_HOST_EXCH_RANGE_START,
+ FCPIO_HOST_EXCH_RANGE_END);
+ if (!lp->emp) {
+ err = -ENOMEM;
+ goto err_out_remove_scsi_host;
+ }
+
+ lp->max_retry_count = fnic->config.flogi_retries;
+ lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
+ FCP_SPPF_CONF_COMPL);
+ if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR)
+ lp->service_params |= FCP_SPPF_RETRY;
+
+ lp->boot_time = jiffies;
+ lp->e_d_tov = fnic->config.ed_tov;
+ lp->r_a_tov = fnic->config.ra_tov;
+ lp->link_supported_speeds = FC_PORTSPEED_10GBIT;
+ fc_set_wwnn(lp, fnic->config.node_wwn);
+ fc_set_wwpn(lp, fnic->config.port_wwn);
+
+ fc_exch_init(lp);
+ fc_lport_init(lp);
+ fc_elsct_init(lp);
+ fc_rport_init(lp);
+ fc_disc_init(lp);
+
+ fc_lport_config(lp);
+
+ if (fc_set_mfs(lp, fnic->config.maxdatafieldsize +
+ sizeof(struct fc_frame_header))) {
+ err = -EINVAL;
+ goto err_out_free_exch_mgr;
+ }
+ fc_host_maxframe_size(lp->host) = lp->mfs;
+
+ sprintf(fc_host_symbolic_name(lp->host),
+ DRV_NAME " v" DRV_VERSION " over %s", fnic->name);
+
+ spin_lock_irqsave(&fnic_list_lock, flags);
+ list_add_tail(&fnic->list, &fnic_list);
+ spin_unlock_irqrestore(&fnic_list_lock, flags);
+
+ /* Enable all queues */
+ for (i = 0; i < fnic->raw_wq_count; i++)
+ vnic_wq_enable(&fnic->wq[i]);
+ for (i = 0; i < fnic->rq_count; i++)
+ vnic_rq_enable(&fnic->rq[i]);
+ for (i = 0; i < fnic->wq_copy_count; i++)
+ vnic_wq_copy_enable(&fnic->wq_copy[i]);
+
+ fc_fabric_login(lp);
+
+ vnic_dev_enable(fnic->vdev);
+ for (i = 0; i < fnic->intr_count; i++)
+ vnic_intr_unmask(&fnic->intr[i]);
+
+ fnic_notify_timer_start(fnic);
+
+ return 0;
+
+err_out_free_exch_mgr:
+ fc_exch_mgr_free(lp->emp);
+err_out_remove_scsi_host:
+ fc_remove_host(fnic->lport->host);
+ scsi_remove_host(fnic->lport->host);
+err_out_free_rq_buf:
+ for (i = 0; i < fnic->rq_count; i++)
+ vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
+ vnic_dev_notify_unset(fnic->vdev);
+err_out_free_max_pool:
+ mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]);
+err_out_free_dflt_pool:
+ mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]);
+err_out_free_ioreq_pool:
+ mempool_destroy(fnic->io_req_pool);
+err_out_free_resources:
+ fnic_free_vnic_resources(fnic);
+err_out_free_intr:
+ fnic_free_intr(fnic);
+err_out_clear_intr:
+ fnic_clear_intr_mode(fnic);
+err_out_dev_close:
+ vnic_dev_close(fnic->vdev);
+err_out_vnic_unregister:
+ vnic_dev_unregister(fnic->vdev);
+err_out_iounmap:
+ fnic_iounmap(fnic);
+err_out_release_regions:
+ pci_release_regions(pdev);
+err_out_disable_device:
+ pci_disable_device(pdev);
+err_out_free_hba:
+ scsi_host_put(lp->host);
+err_out:
+ return err;
+}
+
+static void __devexit fnic_remove(struct pci_dev *pdev)
+{
+ struct fnic *fnic = pci_get_drvdata(pdev);
+ unsigned long flags;
+ unsigned long wait_flush;
+
+ /*
+ * Mark state so that the workqueue thread stops forwarding
+ * received frames and link events to the local port. ISR and
+ * other threads that can queue work items will also stop
+ * creating work items on the fnic workqueue
+ */
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ fnic->stop_rx_link_events = 1;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ /*
+ * Flush the fnic event queue. After this call, there should
+ * be no event queued for this fnic device in the workqueue
+ */
+ flush_workqueue(fnic_event_queue);
+
+ /*
+ * Log off the fabric. This stops all remote ports, dns port,
+ * logs off the fabric. This flushes all rport, disc, lport work
+ * before returning
+ */
+ fc_fabric_logoff(fnic->lport);
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ fnic->in_remove = 1;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ /*
+ * There might still be some events which had begun processing
+ * before stop_rx_link_events was set, and whose processing was
+ * not flushed in the flush_workqueue above. Wait for those events
+ * to complete
+ */
+ wait_flush = jiffies + 5 * HZ;
+ while (time_before(jiffies, wait_flush)) {
+ BUG_ON(fnic->event_count < 0);
+ if (!fnic->event_count)
+ break;
+ ssleep(1);
+ }
+
+ if (fnic->event_count) {
+ printk(KERN_DEBUG DFX "event count = %d\n", fnic->fnic_no,
+ fnic->event_count);
+ BUG_ON(1);
+ }
+
+ fc_lport_destroy(fnic->lport);
+
+ /*
+ * This stops the fnic device, masks all interrupts. Completed
+ * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are
+ * cleaned up
+ */
+ fnic_cleanup(fnic);
+
+ spin_lock_irqsave(&fnic_list_lock, flags);
+ list_del(&fnic->list);
+ spin_unlock_irqrestore(&fnic_list_lock, flags);
+
+ fc_remove_host(fnic->lport->host);
+ scsi_remove_host(fnic->lport->host);
+ fc_exch_mgr_free(fnic->lport->emp);
+ vnic_dev_notify_unset(fnic->vdev);
+ fnic_free_vnic_resources(fnic);
+ fnic_free_intr(fnic);
+ fnic_clear_intr_mode(fnic);
+ vnic_dev_close(fnic->vdev);
+ vnic_dev_unregister(fnic->vdev);
+ fnic_iounmap(fnic);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ pci_set_drvdata(pdev, NULL);
+ scsi_host_put(fnic->lport->host);
+}
+
+static struct pci_driver fnic_driver = {
+ .name = DRV_NAME,
+ .id_table = fnic_id_table,
+ .probe = fnic_probe,
+ .remove = __devexit_p(fnic_remove),
+};
+
+static int __init fnic_init_module(void)
+{
+ size_t len;
+ int err = 0;
+
+ printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
+
+ /* Create a cache for allocation of default size sgls */
+ len = sizeof(struct fnic_dflt_sgl_list);
+ fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create
+ ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
+ SLAB_HWCACHE_ALIGN | SLAB_CACHE_DMA,
+ NULL);
+ if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) {
+ printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n");
+ err = -ENOMEM;
+ goto err_create_fnic_sgl_slab_dflt;
+ }
+
+ /* Create a cache for allocation of max size sgls*/
+ len = sizeof(struct fnic_sgl_list);
+ fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create
+ ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
+ SLAB_HWCACHE_ALIGN | SLAB_CACHE_DMA,
+ NULL);
+ if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) {
+ printk(KERN_ERR PFX "failed to create fnic max sgl slab\n");
+ err = -ENOMEM;
+ goto err_create_fnic_sgl_slab_max;
+ }
+
+ /* Create a cache of events to post work to fnic workQ */
+ len = sizeof(struct fnic_event);
+ fnic_ev_cache = kmem_cache_create("fnic_event", len,
+ 0, 0, NULL);
+ if (!fnic_ev_cache) {
+ printk(KERN_ERR PFX "failed to create fnic event slab\n");
+ err = -ENOMEM;
+ goto err_create_fnic_ev_slab;
+ }
+
+ /* Create a cache of io_req structs for use via mempool */
+ fnic_io_req_cache = kmem_cache_create("fnic_io_req",
+ sizeof(struct fnic_io_req),
+ 0, SLAB_HWCACHE_ALIGN, NULL);
+ if (!fnic_io_req_cache) {
+ printk(KERN_ERR PFX "failed to create fnic io_req slab\n");
+ err = -ENOMEM;
+ goto err_create_fnic_ioreq_slab;
+ }
+
+ fnic_event_queue = create_singlethread_workqueue("fnic_event_wq");
+ if (!fnic_event_queue) {
+ printk(KERN_ERR PFX "fnic work queue create failed\n");
+ err = -ENOMEM;
+ goto err_create_fnic_workq;
+ }
+
+ /* initialize fnic_no to -1, the first device is numbered 0 */
+ atomic_set(&fnic_no, -1);
+ spin_lock_init(&fnic_list_lock);
+ INIT_LIST_HEAD(&fnic_list);
+
+ fnic_fc_transport = fc_attach_transport(&fnic_fc_functions);
+ if (!fnic_fc_transport) {
+ printk(KERN_ERR PFX "fc_attach_transport error\n");
+ err = -ENOMEM;
+ goto err_fc_transport;
+ }
+
+ /* register the driver with PCI system */
+ err = pci_register_driver(&fnic_driver);
+ if (err < 0) {
+ printk(KERN_ERR PFX "pci register error\n");
+ goto err_pci_register;
+ }
+ return err;
+
+err_pci_register:
+ fc_release_transport(fnic_fc_transport);
+err_fc_transport:
+ destroy_workqueue(fnic_event_queue);
+err_create_fnic_workq:
+ kmem_cache_destroy(fnic_io_req_cache);
+err_create_fnic_ioreq_slab:
+ kmem_cache_destroy(fnic_ev_cache);
+err_create_fnic_ev_slab:
+ kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
+err_create_fnic_sgl_slab_max:
+ kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
+err_create_fnic_sgl_slab_dflt:
+ return err;
+}
+
+static void __exit fnic_cleanup_module(void)
+{
+ pci_unregister_driver(&fnic_driver);
+ destroy_workqueue(fnic_event_queue);
+ kmem_cache_destroy(fnic_ev_cache);
+ kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
+ kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
+ kmem_cache_destroy(fnic_io_req_cache);
+ fc_release_transport(fnic_fc_transport);
+}
+
+module_init(fnic_init_module);
+module_exit(fnic_cleanup_module);
+
^ permalink raw reply related [flat|nested] 13+ messages in thread* Re: [RFC][PATCH 1/6] fnic: add main file with module infrastructure, fnic structure, Makefile
2009-02-28 2:31 ` [RFC][PATCH 1/6] fnic: add main file with module infrastructure, fnic structure, Makefile Abhijeet Joglekar
@ 2009-03-12 20:13 ` Mike Christie
0 siblings, 0 replies; 13+ messages in thread
From: Mike Christie @ 2009-03-12 20:13 UTC (permalink / raw)
To: Abhijeet Joglekar; +Cc: james.bottomley, linux-scsi, jeykholt
Abhijeet Joglekar wrote:
> +
> +void fnic_handle_link_event(struct fnic *fnic)
> +{
> + int link_status = vnic_dev_link_status(fnic->vdev);
> + struct fnic_event *event;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&fnic->fnic_lock, flags);
> + if (fnic->stop_rx_link_events) {
> + spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> + return;
> + }
> +
> + FNIC_MAIN_DBG(KERN_DEBUG, DFX "link %s\n", fnic->fnic_no,
> + (link_status ? "up" : "down"));
> +
> + event = kmem_cache_alloc(fnic_ev_cache, GFP_ATOMIC);
> + if (!event) {
> + FNIC_MAIN_DBG(KERN_DEBUG, DFX "Cannot allocate a event, "
> + "cannot indicate link event to FCS\n",
> + fnic->fnic_no);
> + spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> + return;
> + }
> +
> + /* Queue the link event in fnic workQ */
> + memset(event, 0, sizeof(struct fnic_event));
> + event->fnic = fnic;
> + event->ev_type = EV_TYPE_LINK_UP;
How may events types are there going to be?
If the link is down and you need this to get the link up again then you
do not want to rely on just a GFP_ATOMIC allocation.
If there is just a couple events then maybe allocating a work_struct for
each one in the fnic struct would be ok. You could then just queue that
up here and add some code to handle multiple ups/downs.
Or at least I think you want a mempool of events. That does not fully
over you but at least you know you can handle some events and then code
it so you can recover.
> + if (!link_status) {
> + event->ev_type = EV_TYPE_LINK_DOWN;
> + fnic->lport->host_stats.link_failure_count++;
> + }
> + fnic->event_count++;
> + spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> +
> + INIT_WORK(&event->event_work, fnic_event_work);
> + queue_work(fnic_event_queue, &event->event_work);
> +
> +}
> +
> +static int fnic_notify_set(struct fnic *fnic)
> +{
> + int err;
> +
> + switch (vnic_dev_get_intr_mode(fnic->vdev)) {
> + case VNIC_DEV_INTR_MODE_INTX:
> + err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY);
> + break;
> + case VNIC_DEV_INTR_MODE_MSI:
> + err = vnic_dev_notify_set(fnic->vdev, -1);
> + break;
> + case VNIC_DEV_INTR_MODE_MSIX:
> + err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY);
> + break;
> + default:
> + printk(KERN_ERR DFX "Interrupt mode should be set up"
> + " before devcmd notify set %d\n", fnic->fnic_no,
> + vnic_dev_get_intr_mode(fnic->vdev));
> + err = -1;
> + break;
> + }
> +
> + return err;
> +}
> +
> +static void fnic_notify_timer(unsigned long data)
> +{
> + struct fnic *fnic = (struct fnic *)data;
> +
> + fnic_handle_link_event(fnic);
> + mod_timer(&fnic->notify_timer,
> + round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));
> +}
> +
> +static void fnic_notify_timer_start(struct fnic *fnic)
> +{
> + switch (vnic_dev_get_intr_mode(fnic->vdev)) {
> + case VNIC_DEV_INTR_MODE_MSI:
> + /*
> + * Schedule first timeout immediately. The driver is
> + * initiatialized and ready to look for link up notification
> + */
> + mod_timer(&fnic->notify_timer, jiffies);
Do you just want to call fnic_notify_timer() here instead of going
through the timer?
> +}
> +
> +static int __devinit fnic_probe(struct pci_dev *pdev,
> + const struct pci_device_id *ent)
> +{
> + struct Scsi_Host *host;
> + struct fc_lport *lp;
> + struct fnic *fnic;
> + mempool_t *pool;
> + int err;
> + int i;
> + unsigned long flags;
> +
> + /*
> + * Allocate SCSI Host and set up association between host,
> + * local port, and fnic
> + */
> + host = scsi_host_alloc(&fnic_host_template,
> + sizeof(struct fc_lport) + sizeof(struct fnic));
> + if (!host) {
> + printk(KERN_ERR PFX "Unable to alloc SCSI host\n");
> + err = -ENOMEM;
> + goto err_out;
> + }
> + lp = shost_priv(host);
> + lp->host = host;
> + fnic = lport_priv(lp);
> + fnic->lport = lp;
> +
> + /* fnic number starts from 0 onwards */
> + fnic->fnic_no = atomic_add_return(1, &fnic_no);
This is basically the shost->host_no. I think it is best if you just use
that so when you print it out users do not have look through the logs to
match up the fnic host no with the scsi host no.
I think something built on shost_printk or dev_printk is nice to use
for driver logging too. I think this is optional and if needed can
probably be fixed after this is merged though.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [RFC][PATCH 2/6] fnic: add SCSI FCP handling
2009-02-28 2:31 [PATCH 0/6] FCoE HBA Driver (fnic) for 2.6.30 feature window Abhijeet Joglekar
2009-02-28 2:31 ` [RFC][PATCH 1/6] fnic: add main file with module infrastructure, fnic structure, Makefile Abhijeet Joglekar
@ 2009-02-28 2:32 ` Abhijeet Joglekar
2009-03-12 20:27 ` Mike Christie
2009-02-28 2:32 ` [RFC][PATCH 3/6] fnic: Add support for Fibre Channel Services through libFC Abhijeet Joglekar
` (3 subsequent siblings)
5 siblings, 1 reply; 13+ messages in thread
From: Abhijeet Joglekar @ 2009-02-28 2:32 UTC (permalink / raw)
To: james.bottomley, linux-scsi; +Cc: abjoglek, jeykholt
fnic: add SCSI FCP handling
fnic_scsi.c: contains SCSI FCP handling, fw reset, flogi addr registration
fnic_io.h: defines per IO request state structure
fcpio.h: defines data structures used for driver-fw communication
Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com>
---
drivers/scsi/fnic/fcpio.h | 780 +++++++++++++++++
drivers/scsi/fnic/fnic_io.h | 67 +
drivers/scsi/fnic/fnic_scsi.c | 1869 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 2716 insertions(+), 0 deletions(-)
create mode 100644 drivers/scsi/fnic/fcpio.h
create mode 100644 drivers/scsi/fnic/fnic_io.h
create mode 100644 drivers/scsi/fnic/fnic_scsi.c
diff --git a/drivers/scsi/fnic/fcpio.h b/drivers/scsi/fnic/fcpio.h
new file mode 100644
index 0000000..12d770d
--- /dev/null
+++ b/drivers/scsi/fnic/fcpio.h
@@ -0,0 +1,780 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _FCPIO_H_
+#define _FCPIO_H_
+
+#include <linux/if_ether.h>
+
+/*
+ * This header file includes all of the data structures used for
+ * communication by the host driver to the fcp firmware.
+ */
+
+/*
+ * Exchange and sequence id space allocated to the host driver
+ */
+#define FCPIO_HOST_EXCH_RANGE_START 0x1000
+#define FCPIO_HOST_EXCH_RANGE_END 0x1fff
+#define FCPIO_HOST_SEQ_ID_RANGE_START 0x80
+#define FCPIO_HOST_SEQ_ID_RANGE_END 0xff
+
+/*
+ * Command entry type
+ */
+enum fcpio_type {
+ /*
+ * Initiator request types
+ */
+ FCPIO_ICMND_16 = 0x1,
+ FCPIO_ICMND_32,
+ FCPIO_ICMND_CMPL,
+ FCPIO_ITMF,
+ FCPIO_ITMF_CMPL,
+
+ /*
+ * Target request types
+ */
+ FCPIO_TCMND_16 = 0x11,
+ FCPIO_TCMND_32,
+ FCPIO_TDATA,
+ FCPIO_TXRDY,
+ FCPIO_TRSP,
+ FCPIO_TDRSP_CMPL,
+ FCPIO_TTMF,
+ FCPIO_TTMF_ACK,
+ FCPIO_TABORT,
+ FCPIO_TABORT_CMPL,
+
+ /*
+ * Misc request types
+ */
+ FCPIO_ACK = 0x20,
+ FCPIO_RESET,
+ FCPIO_RESET_CMPL,
+ FCPIO_FLOGI_REG,
+ FCPIO_FLOGI_REG_CMPL,
+ FCPIO_ECHO,
+ FCPIO_ECHO_CMPL,
+ FCPIO_LUNMAP_CHNG,
+ FCPIO_LUNMAP_REQ,
+ FCPIO_LUNMAP_REQ_CMPL,
+ FCPIO_FLOGI_FIP_REG,
+ FCPIO_FLOGI_FIP_REG_CMPL,
+};
+
+/*
+ * Header status codes from the firmware
+ */
+enum fcpio_status {
+ FCPIO_SUCCESS = 0, /* request was successful */
+
+ /*
+ * If a request to the firmware is rejected, the original request
+ * header will be returned with the status set to one of the following:
+ */
+ FCPIO_INVALID_HEADER, /* header contains invalid data */
+ FCPIO_OUT_OF_RESOURCE, /* out of resources to complete request */
+ FCPIO_INVALID_PARAM, /* some parameter in request is invalid */
+ FCPIO_REQ_NOT_SUPPORTED, /* request type is not supported */
+ FCPIO_IO_NOT_FOUND, /* requested I/O was not found */
+
+ /*
+ * Once a request is processed, the firmware will usually return
+ * a cmpl message type. In cases where errors occurred,
+ * the header status field would be filled in with one of the following:
+ */
+ FCPIO_ABORTED = 0x41, /* request was aborted */
+ FCPIO_TIMEOUT, /* request was timed out */
+ FCPIO_SGL_INVALID, /* request was aborted due to sgl error */
+ FCPIO_MSS_INVALID, /* request was aborted due to mss error */
+ FCPIO_DATA_CNT_MISMATCH, /* recv/sent more/less data than exp. */
+ FCPIO_FW_ERR, /* request was terminated due to fw error */
+ FCPIO_ITMF_REJECTED, /* itmf req was rejected by remote node */
+ FCPIO_ITMF_FAILED, /* itmf req was failed by remote node */
+ FCPIO_ITMF_INCORRECT_LUN, /* itmf req targeted incorrect LUN */
+ FCPIO_CMND_REJECTED, /* request was invalid and rejected */
+ FCPIO_NO_PATH_AVAIL, /* no paths to the lun was available */
+ FCPIO_PATH_FAILED, /* i/o sent to current path failed */
+ FCPIO_LUNMAP_CHNG_PEND, /* i/o rejected due to lunmap change */
+};
+
+/*
+ * The header command tag. All host requests will use the "tag" field
+ * to mark commands with a unique tag. When the firmware responds to
+ * a host request, it will copy the tag field into the response.
+ *
+ * The only firmware requests that will use the rx_id/ox_id fields instead
+ * of the tag field will be the target command and target task management
+ * requests. These two requests do not have corresponding host requests
+ * since they come directly from the FC initiator on the network.
+ */
+struct fcpio_tag {
+ union {
+ u32 req_id;
+ struct {
+ u16 rx_id;
+ u16 ox_id;
+ } ex_id;
+ } u;
+};
+
+static inline void
+fcpio_tag_id_enc(struct fcpio_tag *tag, u32 id)
+{
+ tag->u.req_id = id;
+}
+
+static inline void
+fcpio_tag_id_dec(struct fcpio_tag *tag, u32 *id)
+{
+ *id = tag->u.req_id;
+}
+
+static inline void
+fcpio_tag_exid_enc(struct fcpio_tag *tag, u16 ox_id, u16 rx_id)
+{
+ tag->u.ex_id.rx_id = rx_id;
+ tag->u.ex_id.ox_id = ox_id;
+}
+
+static inline void
+fcpio_tag_exid_dec(struct fcpio_tag *tag, u16 *ox_id, u16 *rx_id)
+{
+ *rx_id = tag->u.ex_id.rx_id;
+ *ox_id = tag->u.ex_id.ox_id;
+}
+
+/*
+ * The header for an fcpio request, whether from the firmware or from the
+ * host driver
+ */
+struct fcpio_header {
+ u8 type; /* enum fcpio_type */
+ u8 status; /* header status entry */
+ u16 _resvd; /* reserved */
+ struct fcpio_tag tag; /* header tag */
+};
+
+static inline void
+fcpio_header_enc(struct fcpio_header *hdr,
+ u8 type, u8 status,
+ struct fcpio_tag tag)
+{
+ hdr->type = type;
+ hdr->status = status;
+ hdr->_resvd = 0;
+ hdr->tag = tag;
+}
+
+static inline void
+fcpio_header_dec(struct fcpio_header *hdr,
+ u8 *type, u8 *status,
+ struct fcpio_tag *tag)
+{
+ *type = hdr->type;
+ *status = hdr->status;
+ *tag = hdr->tag;
+}
+
+#define CDB_16 16
+#define CDB_32 32
+#define LUN_ADDRESS 8
+
+/*
+ * fcpio_icmnd_16: host -> firmware request
+ *
+ * used for sending out an initiator SCSI 16-byte command
+ */
+struct fcpio_icmnd_16 {
+ u32 lunmap_id; /* index into lunmap table */
+ u8 special_req_flags; /* special exchange request flags */
+ u8 _resvd0[3]; /* reserved */
+ u32 sgl_cnt; /* scatter-gather list count */
+ u32 sense_len; /* sense buffer length */
+ u64 sgl_addr; /* scatter-gather list addr */
+ u64 sense_addr; /* sense buffer address */
+ u8 crn; /* SCSI Command Reference No. */
+ u8 pri_ta; /* SCSI Priority and Task attribute */
+ u8 _resvd1; /* reserved: should be 0 */
+ u8 flags; /* command flags */
+ u8 scsi_cdb[CDB_16]; /* SCSI Cmnd Descriptor Block */
+ u32 data_len; /* length of data expected */
+ u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
+ u8 _resvd2; /* reserved */
+ u8 d_id[3]; /* FC vNIC only: Target D_ID */
+ u16 mss; /* FC vNIC only: max burst */
+ u16 _resvd3; /* reserved */
+ u32 r_a_tov; /* FC vNIC only: Res. Alloc Timeout */
+ u32 e_d_tov; /* FC vNIC only: Err Detect Timeout */
+};
+
+/*
+ * Special request flags
+ */
+#define FCPIO_ICMND_SRFLAG_RETRY 0x01 /* Enable Retry handling on exchange */
+
+/*
+ * Priority/Task Attribute settings
+ */
+#define FCPIO_ICMND_PTA_SIMPLE 0 /* simple task attribute */
+#define FCPIO_ICMND_PTA_HEADQ 1 /* head of queue task attribute */
+#define FCPIO_ICMND_PTA_ORDERED 2 /* ordered task attribute */
+#define FCPIO_ICMND_PTA_ACA 4 /* auto contingent allegiance */
+#define FCPIO_ICMND_PRI_SHIFT 3 /* priority field starts in bit 3 */
+
+/*
+ * Command flags
+ */
+#define FCPIO_ICMND_RDDATA 0x02 /* read data */
+#define FCPIO_ICMND_WRDATA 0x01 /* write data */
+
+/*
+ * fcpio_icmnd_32: host -> firmware request
+ *
+ * used for sending out an initiator SCSI 32-byte command
+ */
+struct fcpio_icmnd_32 {
+ u32 lunmap_id; /* index into lunmap table */
+ u8 special_req_flags; /* special exchange request flags */
+ u8 _resvd0[3]; /* reserved */
+ u32 sgl_cnt; /* scatter-gather list count */
+ u32 sense_len; /* sense buffer length */
+ u64 sgl_addr; /* scatter-gather list addr */
+ u64 sense_addr; /* sense buffer address */
+ u8 crn; /* SCSI Command Reference No. */
+ u8 pri_ta; /* SCSI Priority and Task attribute */
+ u8 _resvd1; /* reserved: should be 0 */
+ u8 flags; /* command flags */
+ u8 scsi_cdb[CDB_32]; /* SCSI Cmnd Descriptor Block */
+ u32 data_len; /* length of data expected */
+ u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
+ u8 _resvd2; /* reserved */
+ u8 d_id[3]; /* FC vNIC only: Target D_ID */
+ u16 mss; /* FC vNIC only: max burst */
+ u16 _resvd3; /* reserved */
+ u32 r_a_tov; /* FC vNIC only: Res. Alloc Timeout */
+ u32 e_d_tov; /* FC vNIC only: Error Detect Timeout */
+};
+
+/*
+ * fcpio_itmf: host -> firmware request
+ *
+ * used for requesting the firmware to abort a request and/or send out
+ * a task management function
+ *
+ * The t_tag field is only needed when the request type is ABT_TASK.
+ */
+struct fcpio_itmf {
+ u32 lunmap_id; /* index into lunmap table */
+ u32 tm_req; /* SCSI Task Management request */
+ u32 t_tag; /* header tag of fcpio to be aborted */
+ u32 _resvd; /* _reserved */
+ u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
+ u8 _resvd1; /* reserved */
+ u8 d_id[3]; /* FC vNIC only: Target D_ID */
+ u32 r_a_tov; /* FC vNIC only: R_A_TOV in msec */
+ u32 e_d_tov; /* FC vNIC only: E_D_TOV in msec */
+};
+
+/*
+ * Task Management request
+ */
+enum fcpio_itmf_tm_req_type {
+ FCPIO_ITMF_ABT_TASK_TERM = 0x01, /* abort task and terminate */
+ FCPIO_ITMF_ABT_TASK, /* abort task and issue abts */
+ FCPIO_ITMF_ABT_TASK_SET, /* abort task set */
+ FCPIO_ITMF_CLR_TASK_SET, /* clear task set */
+ FCPIO_ITMF_LUN_RESET, /* logical unit reset task mgmt */
+ FCPIO_ITMF_CLR_ACA, /* Clear ACA condition */
+};
+
+/*
+ * fcpio_tdata: host -> firmware request
+ *
+ * used for requesting the firmware to send out a read data transfer for a
+ * target command
+ */
+struct fcpio_tdata {
+ u16 rx_id; /* FC rx_id of target command */
+ u16 flags; /* command flags */
+ u32 rel_offset; /* data sequence relative offset */
+ u32 sgl_cnt; /* scatter-gather list count */
+ u32 data_len; /* length of data expected to send */
+ u64 sgl_addr; /* scatter-gather list address */
+};
+
+/*
+ * Command flags
+ */
+#define FCPIO_TDATA_SCSI_RSP 0x01 /* send a scsi resp. after last frame */
+
+/*
+ * fcpio_txrdy: host -> firmware request
+ *
+ * used for requesting the firmware to send out a write data transfer for a
+ * target command
+ */
+struct fcpio_txrdy {
+ u16 rx_id; /* FC rx_id of target command */
+ u16 _resvd0; /* reserved */
+ u32 rel_offset; /* data sequence relative offset */
+ u32 sgl_cnt; /* scatter-gather list count */
+ u32 data_len; /* length of data expected to send */
+ u64 sgl_addr; /* scatter-gather list address */
+};
+
+/*
+ * fcpio_trsp: host -> firmware request
+ *
+ * used for requesting the firmware to send out a response for a target
+ * command
+ */
+struct fcpio_trsp {
+ u16 rx_id; /* FC rx_id of target command */
+ u16 _resvd0; /* reserved */
+ u32 sense_len; /* sense data buffer length */
+ u64 sense_addr; /* sense data buffer address */
+ u16 _resvd1; /* reserved */
+ u8 flags; /* response request flags */
+ u8 scsi_status; /* SCSI status */
+ u32 residual; /* SCSI data residual value of I/O */
+};
+
+/*
+ * resposnse request flags
+ */
+#define FCPIO_TRSP_RESID_UNDER 0x08 /* residual is valid and is underflow */
+#define FCPIO_TRSP_RESID_OVER 0x04 /* residual is valid and is overflow */
+
+/*
+ * fcpio_ttmf_ack: host -> firmware response
+ *
+ * used by the host to indicate to the firmware it has received and processed
+ * the target tmf request
+ */
+struct fcpio_ttmf_ack {
+ u16 rx_id; /* FC rx_id of target command */
+ u16 _resvd0; /* reserved */
+ u32 tmf_status; /* SCSI task management status */
+};
+
+/*
+ * fcpio_tabort: host -> firmware request
+ *
+ * used by the host to request the firmware to abort a target request that was
+ * received by the firmware
+ */
+struct fcpio_tabort {
+ u16 rx_id; /* rx_id of the target request */
+};
+
+/*
+ * fcpio_reset: host -> firmware request
+ *
+ * used by the host to signal a reset of the driver to the firmware
+ * and to request firmware to clean up all outstanding I/O
+ */
+struct fcpio_reset {
+ u32 _resvd;
+};
+
+enum fcpio_flogi_reg_format_type {
+ FCPIO_FLOGI_REG_DEF_DEST = 0, /* Use the oui | s_id mac format */
+ FCPIO_FLOGI_REG_GW_DEST, /* Use the fixed gateway mac */
+};
+
+/*
+ * fcpio_flogi_reg: host -> firmware request
+ *
+ * fc vnic only
+ * used by the host to notify the firmware of the lif's s_id
+ * and destination mac address format
+ */
+struct fcpio_flogi_reg {
+ u8 format;
+ u8 s_id[3]; /* FC vNIC only: Source S_ID */
+ u8 gateway_mac[ETH_ALEN]; /* Destination gateway mac */
+ u16 _resvd;
+ u32 r_a_tov; /* R_A_TOV in msec */
+ u32 e_d_tov; /* E_D_TOV in msec */
+};
+
+/*
+ * fcpio_echo: host -> firmware request
+ *
+ * sends a heartbeat echo request to the firmware
+ */
+struct fcpio_echo {
+ u32 _resvd;
+};
+
+/*
+ * fcpio_lunmap_req: host -> firmware request
+ *
+ * scsi vnic only
+ * sends a request to retrieve the lunmap table for scsi vnics
+ */
+struct fcpio_lunmap_req {
+ u64 addr; /* address of the buffer */
+ u32 len; /* len of the buffer */
+};
+
+/*
+ * fcpio_flogi_fip_reg: host -> firmware request
+ *
+ * fc vnic only
+ * used by the host to notify the firmware of the lif's s_id
+ * and destination mac address format
+ */
+struct fcpio_flogi_fip_reg {
+ u8 _resvd0;
+ u8 s_id[3]; /* FC vNIC only: Source S_ID */
+ u8 fcf_mac[ETH_ALEN]; /* FCF Target destination mac */
+ u16 _resvd1;
+ u32 r_a_tov; /* R_A_TOV in msec */
+ u32 e_d_tov; /* E_D_TOV in msec */
+ u8 ha_mac[ETH_ALEN]; /* Host adapter source mac */
+ u16 _resvd2;
+};
+
+/*
+ * Basic structure for all fcpio structures that are sent from the host to the
+ * firmware. They are 128 bytes per structure.
+ */
+#define FCPIO_HOST_REQ_LEN 128 /* expected length of host requests */
+
+struct fcpio_host_req {
+ struct fcpio_header hdr;
+
+ union {
+ /*
+ * Defines space needed for request
+ */
+ u8 buf[FCPIO_HOST_REQ_LEN - sizeof(struct fcpio_header)];
+
+ /*
+ * Initiator host requests
+ */
+ struct fcpio_icmnd_16 icmnd_16;
+ struct fcpio_icmnd_32 icmnd_32;
+ struct fcpio_itmf itmf;
+
+ /*
+ * Target host requests
+ */
+ struct fcpio_tdata tdata;
+ struct fcpio_txrdy txrdy;
+ struct fcpio_trsp trsp;
+ struct fcpio_ttmf_ack ttmf_ack;
+ struct fcpio_tabort tabort;
+
+ /*
+ * Misc requests
+ */
+ struct fcpio_reset reset;
+ struct fcpio_flogi_reg flogi_reg;
+ struct fcpio_echo echo;
+ struct fcpio_lunmap_req lunmap_req;
+ struct fcpio_flogi_fip_reg flogi_fip_reg;
+ } u;
+};
+
+/*
+ * fcpio_icmnd_cmpl: firmware -> host response
+ *
+ * used for sending the host a response to an initiator command
+ */
+struct fcpio_icmnd_cmpl {
+ u8 _resvd0[6]; /* reserved */
+ u8 flags; /* response flags */
+ u8 scsi_status; /* SCSI status */
+ u32 residual; /* SCSI data residual length */
+ u32 sense_len; /* SCSI sense length */
+};
+
+/*
+ * response flags
+ */
+#define FCPIO_ICMND_CMPL_RESID_UNDER 0x08 /* resid under and valid */
+#define FCPIO_ICMND_CMPL_RESID_OVER 0x04 /* resid over and valid */
+
+/*
+ * fcpio_itmf_cmpl: firmware -> host response
+ *
+ * used for sending the host a response for a itmf request
+ */
+struct fcpio_itmf_cmpl {
+ u32 _resvd; /* reserved */
+};
+
+/*
+ * fcpio_tcmnd_16: firmware -> host request
+ *
+ * used by the firmware to notify the host of an incoming target SCSI 16-Byte
+ * request
+ */
+struct fcpio_tcmnd_16 {
+ u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
+ u8 crn; /* SCSI Command Reference No. */
+ u8 pri_ta; /* SCSI Priority and Task attribute */
+ u8 _resvd2; /* reserved: should be 0 */
+ u8 flags; /* command flags */
+ u8 scsi_cdb[CDB_16]; /* SCSI Cmnd Descriptor Block */
+ u32 data_len; /* length of data expected */
+ u8 _resvd1; /* reserved */
+ u8 s_id[3]; /* FC vNIC only: Source S_ID */
+};
+
+/*
+ * Priority/Task Attribute settings
+ */
+#define FCPIO_TCMND_PTA_SIMPLE 0 /* simple task attribute */
+#define FCPIO_TCMND_PTA_HEADQ 1 /* head of queue task attribute */
+#define FCPIO_TCMND_PTA_ORDERED 2 /* ordered task attribute */
+#define FCPIO_TCMND_PTA_ACA 4 /* auto contingent allegiance */
+#define FCPIO_TCMND_PRI_SHIFT 3 /* priority field starts in bit 3 */
+
+/*
+ * Command flags
+ */
+#define FCPIO_TCMND_RDDATA 0x02 /* read data */
+#define FCPIO_TCMND_WRDATA 0x01 /* write data */
+
+/*
+ * fcpio_tcmnd_32: firmware -> host request
+ *
+ * used by the firmware to notify the host of an incoming target SCSI 32-Byte
+ * request
+ */
+struct fcpio_tcmnd_32 {
+ u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
+ u8 crn; /* SCSI Command Reference No. */
+ u8 pri_ta; /* SCSI Priority and Task attribute */
+ u8 _resvd2; /* reserved: should be 0 */
+ u8 flags; /* command flags */
+ u8 scsi_cdb[CDB_32]; /* SCSI Cmnd Descriptor Block */
+ u32 data_len; /* length of data expected */
+ u8 _resvd0; /* reserved */
+ u8 s_id[3]; /* FC vNIC only: Source S_ID */
+};
+
+/*
+ * fcpio_tdrsp_cmpl: firmware -> host response
+ *
+ * used by the firmware to notify the host of a response to a host target
+ * command
+ */
+struct fcpio_tdrsp_cmpl {
+ u16 rx_id; /* rx_id of the target request */
+ u16 _resvd0; /* reserved */
+};
+
+/*
+ * fcpio_ttmf: firmware -> host request
+ *
+ * used by the firmware to notify the host of an incoming task management
+ * function request
+ */
+struct fcpio_ttmf {
+ u8 _resvd0; /* reserved */
+ u8 s_id[3]; /* FC vNIC only: Source S_ID */
+ u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
+ u8 crn; /* SCSI Command Reference No. */
+ u8 _resvd2[3]; /* reserved */
+ u32 tmf_type; /* task management request type */
+};
+
+/*
+ * Task Management request
+ */
+#define FCPIO_TTMF_CLR_ACA 0x40 /* Clear ACA condition */
+#define FCPIO_TTMF_LUN_RESET 0x10 /* logical unit reset task mgmt */
+#define FCPIO_TTMF_CLR_TASK_SET 0x04 /* clear task set */
+#define FCPIO_TTMF_ABT_TASK_SET 0x02 /* abort task set */
+#define FCPIO_TTMF_ABT_TASK 0x01 /* abort task */
+
+/*
+ * fcpio_tabort_cmpl: firmware -> host response
+ *
+ * used by the firmware to respond to a host's tabort request
+ */
+struct fcpio_tabort_cmpl {
+ u16 rx_id; /* rx_id of the target request */
+ u16 _resvd0; /* reserved */
+};
+
+/*
+ * fcpio_ack: firmware -> host response
+ *
+ * used by firmware to notify the host of the last work request received
+ */
+struct fcpio_ack {
+ u16 request_out; /* last host entry received */
+ u16 _resvd;
+};
+
+/*
+ * fcpio_reset_cmpl: firmware -> host response
+ *
+ * use by firmware to respond to the host's reset request
+ */
+struct fcpio_reset_cmpl {
+ u16 vnic_id;
+};
+
+/*
+ * fcpio_flogi_reg_cmpl: firmware -> host response
+ *
+ * fc vnic only
+ * response to the fcpio_flogi_reg request
+ */
+struct fcpio_flogi_reg_cmpl {
+ u32 _resvd;
+};
+
+/*
+ * fcpio_echo_cmpl: firmware -> host response
+ *
+ * response to the fcpio_echo request
+ */
+struct fcpio_echo_cmpl {
+ u32 _resvd;
+};
+
+/*
+ * fcpio_lunmap_chng: firmware -> host notification
+ *
+ * scsi vnic only
+ * notifies the host that the lunmap tables have changed
+ */
+struct fcpio_lunmap_chng {
+ u32 _resvd;
+};
+
+/*
+ * fcpio_lunmap_req_cmpl: firmware -> host response
+ *
+ * scsi vnic only
+ * response for lunmap table request from the host
+ */
+struct fcpio_lunmap_req_cmpl {
+ u32 _resvd;
+};
+
+/*
+ * Basic structure for all fcpio structures that are sent from the firmware to
+ * the host. They are 64 bytes per structure.
+ */
+#define FCPIO_FW_REQ_LEN 64 /* expected length of fw requests */
+struct fcpio_fw_req {
+ struct fcpio_header hdr;
+
+ union {
+ /*
+ * Defines space needed for request
+ */
+ u8 buf[FCPIO_FW_REQ_LEN - sizeof(struct fcpio_header)];
+
+ /*
+ * Initiator firmware responses
+ */
+ struct fcpio_icmnd_cmpl icmnd_cmpl;
+ struct fcpio_itmf_cmpl itmf_cmpl;
+
+ /*
+ * Target firmware new requests
+ */
+ struct fcpio_tcmnd_16 tcmnd_16;
+ struct fcpio_tcmnd_32 tcmnd_32;
+
+ /*
+ * Target firmware responses
+ */
+ struct fcpio_tdrsp_cmpl tdrsp_cmpl;
+ struct fcpio_ttmf ttmf;
+ struct fcpio_tabort_cmpl tabort_cmpl;
+
+ /*
+ * Firmware response to work received
+ */
+ struct fcpio_ack ack;
+
+ /*
+ * Misc requests
+ */
+ struct fcpio_reset_cmpl reset_cmpl;
+ struct fcpio_flogi_reg_cmpl flogi_reg_cmpl;
+ struct fcpio_echo_cmpl echo_cmpl;
+ struct fcpio_lunmap_chng lunmap_chng;
+ struct fcpio_lunmap_req_cmpl lunmap_req_cmpl;
+ } u;
+};
+
+/*
+ * Access routines to encode and decode the color bit, which is the most
+ * significant bit of the MSB of the structure
+ */
+static inline void fcpio_color_enc(struct fcpio_fw_req *fw_req, u8 color)
+{
+ u8 *c = ((u8 *) fw_req) + sizeof(struct fcpio_fw_req) - 1;
+
+ if (color)
+ *c |= 0x80;
+ else
+ *c &= ~0x80;
+}
+
+static inline void fcpio_color_dec(struct fcpio_fw_req *fw_req, u8 *color)
+{
+ u8 *c = ((u8 *) fw_req) + sizeof(struct fcpio_fw_req) - 1;
+
+ *color = *c >> 7;
+
+ /*
+ * Make sure color bit is read from desc *before* other fields
+ * are read from desc. Hardware guarantees color bit is last
+ * bit (byte) written. Adding the rmb() prevents the compiler
+ * and/or CPU from reordering the reads which would potentially
+ * result in reading stale values.
+ */
+
+ rmb();
+
+}
+
+/*
+ * Lunmap table entry for scsi vnics
+ */
+#define FCPIO_LUNMAP_TABLE_SIZE 256
+#define FCPIO_FLAGS_LUNMAP_VALID 0x80
+#define FCPIO_FLAGS_BOOT 0x01
+struct fcpio_lunmap_entry {
+ u8 bus;
+ u8 target;
+ u8 lun;
+ u8 path_cnt;
+ u16 flags;
+ u16 update_cnt;
+};
+
+struct fcpio_lunmap_tbl {
+ u32 update_cnt;
+ struct fcpio_lunmap_entry lunmaps[FCPIO_LUNMAP_TABLE_SIZE];
+};
+
+#endif /* _FCPIO_H_ */
diff --git a/drivers/scsi/fnic/fnic_io.h b/drivers/scsi/fnic/fnic_io.h
new file mode 100644
index 0000000..f0b8969
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_io.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _FNIC_IO_H_
+#define _FNIC_IO_H_
+
+#include <scsi/fc/fc_fcp.h>
+
+#define FNIC_DFLT_SG_DESC_CNT 32
+#define FNIC_MAX_SG_DESC_CNT 1024 /* Maximum descriptors per sgl */
+#define FNIC_SG_DESC_ALIGN 16 /* Descriptor address alignment */
+
+struct host_sg_desc {
+ __le64 addr;
+ __le32 len;
+ u32 _resvd;
+};
+
+struct fnic_dflt_sgl_list {
+ struct host_sg_desc sg_desc[FNIC_DFLT_SG_DESC_CNT];
+};
+
+struct fnic_sgl_list {
+ struct host_sg_desc sg_desc[FNIC_MAX_SG_DESC_CNT];
+};
+
+enum fnic_sgl_list_type {
+ FNIC_SGL_CACHE_DFLT = 0, /* cache with default size sgl */
+ FNIC_SGL_CACHE_MAX, /* cache with max size sgl */
+ FNIC_SGL_NUM_CACHES /* number of sgl caches */
+};
+
+enum fnic_ioreq_state {
+ FNIC_IOREQ_CMD_PENDING = 0,
+ FNIC_IOREQ_ABTS_PENDING,
+ FNIC_IOREQ_ABTS_COMPLETE,
+ FNIC_IOREQ_CMD_COMPLETE,
+};
+
+struct fnic_io_req {
+ struct host_sg_desc *sgl_list; /* sgl list */
+ void *sgl_list_alloc; /* sgl list address used for free */
+ dma_addr_t sense_buf_pa; /* dma address for sense buffer*/
+ dma_addr_t sgl_list_pa; /* dma address for sgl list */
+ u16 sgl_cnt;
+ u8 sgl_type; /* device DMA descriptor list type */
+ u8 io_completed:1; /* set to 1 when fw completes IO */
+ u32 port_id; /* remote port DID */
+ struct completion *abts_done; /* completion for abts */
+ struct completion *dr_done; /* completion for device reset */
+};
+
+#endif /* _FNIC_IO_H_ */
diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c
new file mode 100644
index 0000000..6db6359
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_scsi.c
@@ -0,0 +1,1869 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/workqueue.h>
+#include <linux/pci.h>
+#include <linux/scatterlist.h>
+#include <linux/skbuff.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/kthread.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/delay.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_fc.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/fc/fc_els.h>
+#include <scsi/fc/fc_fcoe.h>
+#include <scsi/libfc.h>
+#include <scsi/fc_frame.h>
+#include "fnic_io.h"
+#include "fnic.h"
+
+const char *fnic_state_str[] = {
+ [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE",
+ [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
+ [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE",
+ [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
+};
+
+static const char *fnic_ioreq_state_str[] = {
+ [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
+ [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
+ [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
+ [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
+};
+
+static const char *fcpio_status_str[] = {
+ [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
+ [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
+ [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
+ [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
+ [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
+ [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
+ [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
+ [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
+ [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
+ [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
+ [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
+ [FCPIO_FW_ERR] = "FCPIO_FW_ERR",
+ [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
+ [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
+ [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
+ [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
+ [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
+ [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
+ [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
+};
+
+const char *fnic_state_to_str(unsigned int state)
+{
+ if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
+ return "unknown";
+
+ return fnic_state_str[state];
+}
+
+static const char *fnic_ioreq_state_to_str(unsigned int state)
+{
+ if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
+ !fnic_ioreq_state_str[state])
+ return "unknown";
+
+ return fnic_ioreq_state_str[state];
+}
+
+static const char *fnic_fcpio_status_to_str(unsigned int status)
+{
+ if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
+ return "unknown";
+
+ return fcpio_status_str[status];
+}
+
+static void fnic_cleanup_io(struct fnic *fnic, int exclude_id);
+
+static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic,
+ struct scsi_cmnd *sc)
+{
+ u32 hash = sc->request->tag & (FNIC_IO_LOCKS - 1);
+
+ return &fnic->io_req_lock[hash];
+}
+
+/*
+ * Unmap the data buffer and sense buffer for an io_req,
+ * also unmap and free the device-private scatter/gather list.
+ */
+static void fnic_release_ioreq_buf(struct fnic *fnic,
+ struct fnic_io_req *io_req,
+ struct scsi_cmnd *sc)
+{
+ if (io_req->sgl_list_pa)
+ pci_unmap_single(fnic->pdev, io_req->sgl_list_pa,
+ sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
+ PCI_DMA_TODEVICE);
+ scsi_dma_unmap(sc);
+
+ if (io_req->sgl_cnt)
+ mempool_free(io_req->sgl_list_alloc,
+ fnic->io_sgl_pool[io_req->sgl_type]);
+ if (io_req->sense_buf_pa)
+ pci_unmap_single(fnic->pdev, io_req->sense_buf_pa,
+ SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
+}
+
+/* Free up Copy Wq descriptors. Called with copy_wq lock held */
+static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
+{
+ /* if no Ack received from firmware, then nothing to clean */
+ if (!fnic->fw_ack_recd[0])
+ return 1;
+
+ /*
+ * Update desc_available count based on number of freed descriptors
+ * Account for wraparound
+ */
+ if (wq->to_clean_index <= fnic->fw_ack_index[0])
+ wq->ring.desc_avail += (fnic->fw_ack_index[0]
+ - wq->to_clean_index + 1);
+ else
+ wq->ring.desc_avail += (wq->ring.desc_count
+ - wq->to_clean_index
+ + fnic->fw_ack_index[0] + 1);
+
+ /*
+ * just bump clean index to ack_index+1 accounting for wraparound
+ * this will essentially free up all descriptors between
+ * to_clean_index and fw_ack_index, both inclusive
+ */
+ wq->to_clean_index =
+ (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count;
+
+ /* we have processed the acks received so far */
+ fnic->fw_ack_recd[0] = 0;
+ return 0;
+}
+
+
+/*
+ * fnic_fw_reset_handler
+ * Routine to send reset msg to fw
+ */
+int fnic_fw_reset_handler(struct fnic *fnic)
+{
+ struct vnic_wq_copy *wq = &fnic->wq_copy[0];
+ int ret = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
+
+ if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
+ free_wq_copy_descs(fnic, wq);
+
+ if (!vnic_wq_copy_desc_avail(wq))
+ ret = -EAGAIN;
+ else
+ fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
+
+ spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
+
+ if (!ret)
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "Issued fw reset\n",
+ fnic->fnic_no);
+ else
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "Failed to issue fw reset\n",
+ fnic->fnic_no);
+ return ret;
+}
+
+
+/*
+ * fnic_flogi_reg_handler
+ * Routine to send flogi register msg to fw
+ */
+int fnic_flogi_reg_handler(struct fnic *fnic)
+{
+ struct vnic_wq_copy *wq = &fnic->wq_copy[0];
+ u8 gw_mac[ETH_ALEN];
+ int ret = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
+
+ if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
+ free_wq_copy_descs(fnic, wq);
+
+ if (!vnic_wq_copy_desc_avail(wq)) {
+ ret = -EAGAIN;
+ goto flogi_reg_ioreq_end;
+ }
+
+ if (fnic->fcoui_mode)
+ memset(gw_mac, 0xff, ETH_ALEN);
+ else
+ memcpy(gw_mac, fnic->dest_addr, ETH_ALEN);
+
+ fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
+ FCPIO_FLOGI_REG_GW_DEST,
+ fnic->s_id,
+ gw_mac);
+
+flogi_reg_ioreq_end:
+ spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
+
+ if (!ret)
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "flog reg issued\n",
+ fnic->fnic_no);
+
+ return ret;
+}
+
+/*
+ * fnic_queue_wq_copy_desc
+ * Routine to enqueue a wq copy desc
+ */
+static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
+ struct vnic_wq_copy *wq,
+ struct fnic_io_req *io_req,
+ struct scsi_cmnd *sc,
+ u32 sg_count)
+{
+ struct scatterlist *sg;
+ struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
+ struct fc_rport_libfc_priv *rp = rport->dd_data;
+ struct host_sg_desc *desc;
+ u8 pri_tag = 0;
+ unsigned int i;
+ unsigned long intr_flags;
+ int flags;
+ u8 exch_flags;
+ struct scsi_lun fc_lun;
+ char msg[2];
+
+ if (sg_count) {
+ BUG_ON(sg_count < 0);
+ BUG_ON(sg_count > FNIC_MAX_SG_DESC_CNT);
+
+ /* For each SGE, create a device desc entry */
+ desc = io_req->sgl_list;
+ for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
+ desc->addr = cpu_to_le64(sg_dma_address(sg));
+ desc->len = cpu_to_le32(sg_dma_len(sg));
+ desc->_resvd = 0;
+ desc++;
+ }
+
+ io_req->sgl_list_pa = pci_map_single
+ (fnic->pdev,
+ io_req->sgl_list,
+ sizeof(io_req->sgl_list[0]) * sg_count,
+ PCI_DMA_TODEVICE);
+ }
+
+ io_req->sense_buf_pa = pci_map_single(fnic->pdev,
+ sc->sense_buffer,
+ SCSI_SENSE_BUFFERSIZE,
+ PCI_DMA_FROMDEVICE);
+
+ int_to_scsilun(sc->device->lun, &fc_lun);
+
+ pri_tag = FCPIO_ICMND_PTA_SIMPLE;
+ msg[0] = MSG_SIMPLE_TAG;
+ scsi_populate_tag_msg(sc, msg);
+ if (msg[0] == MSG_ORDERED_TAG)
+ pri_tag = FCPIO_ICMND_PTA_ORDERED;
+
+ /* Enqueue the descriptor in the Copy WQ */
+ spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
+
+ if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
+ free_wq_copy_descs(fnic, wq);
+
+ if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
+ spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
+ return SCSI_MLQUEUE_HOST_BUSY;
+ }
+
+ flags = 0;
+ if (sc->sc_data_direction == DMA_FROM_DEVICE)
+ flags = FCPIO_ICMND_RDDATA;
+ else if (sc->sc_data_direction == DMA_TO_DEVICE)
+ flags = FCPIO_ICMND_WRDATA;
+
+ exch_flags = 0;
+ if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
+ (rp->flags & FC_RP_FLAGS_RETRY))
+ exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
+
+ fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
+ 0, exch_flags, io_req->sgl_cnt,
+ SCSI_SENSE_BUFFERSIZE,
+ io_req->sgl_list_pa,
+ io_req->sense_buf_pa,
+ 0, /* scsi cmd ref, always 0 */
+ pri_tag, /* scsi pri and tag */
+ flags, /* command flags */
+ sc->cmnd, scsi_bufflen(sc),
+ fc_lun.scsi_lun, io_req->port_id,
+ rport->maxframe_size, rp->r_a_tov,
+ rp->e_d_tov);
+
+ spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
+ return 0;
+}
+
+/*
+ * fnic_queuecommand
+ * Routine to send a scsi cdb
+ * Called with host_lock held and interrupts disabled.
+ */
+int fnic_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
+{
+ struct fc_lport *lp;
+ struct fc_rport *rport;
+ struct fnic_io_req *io_req;
+ struct fnic *fnic;
+ struct vnic_wq_copy *wq;
+ int ret;
+ u32 sg_count;
+ unsigned long flags;
+
+ rport = starget_to_rport(scsi_target(sc->device));
+ ret = fc_remote_port_chkready(rport);
+ if (ret) {
+ sc->result = ret;
+ done(sc);
+ return 0;
+ }
+
+ lp = shost_priv(sc->device->host);
+ if (lp->state != LPORT_ST_READY || !(lp->link_up))
+ return SCSI_MLQUEUE_HOST_BUSY;
+
+ /*
+ * Release host lock, use driver resource specific locks from here.
+ * Don't re-enable interrupts in case they were disabled prior to the
+ * caller disabling them.
+ */
+ spin_unlock(lp->host->host_lock);
+
+ /* Get a new io_req for this SCSI IO */
+ fnic = lport_priv(lp);
+
+ io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
+ if (!io_req) {
+ ret = SCSI_MLQUEUE_HOST_BUSY;
+ goto out;
+ }
+ memset(io_req, 0, sizeof(*io_req));
+
+ /* Map the data buffer */
+ sg_count = scsi_dma_map(sc);
+ if (sg_count < 0) {
+ mempool_free(io_req, fnic->io_req_pool);
+ goto out;
+ }
+
+ /* Determine the type of scatter/gather list we need */
+ io_req->sgl_cnt = sg_count;
+ io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
+ if (sg_count > FNIC_DFLT_SG_DESC_CNT)
+ io_req->sgl_type = FNIC_SGL_CACHE_MAX;
+
+ if (sg_count) {
+ io_req->sgl_list =
+ mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
+ GFP_ATOMIC | GFP_DMA);
+ if (!io_req->sgl_list) {
+ ret = SCSI_MLQUEUE_HOST_BUSY;
+ scsi_dma_unmap(sc);
+ mempool_free(io_req, fnic->io_req_pool);
+ goto out;
+ }
+
+ /* Cache sgl list allocated address before alignment */
+ io_req->sgl_list_alloc = io_req->sgl_list;
+ {
+ unsigned long ptr =
+ (unsigned long) io_req->sgl_list;
+
+ if (ptr % FNIC_SG_DESC_ALIGN) {
+ io_req->sgl_list = (struct host_sg_desc *)
+ (((unsigned long) ptr
+ + FNIC_SG_DESC_ALIGN - 1)
+ & ~(FNIC_SG_DESC_ALIGN - 1));
+ }
+ }
+ }
+
+ /* initialize rest of io_req */
+ io_req->port_id = rport->port_id;
+ CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
+ CMD_SP(sc) = (char *)io_req;
+ sc->scsi_done = done;
+
+ /* create copy wq desc and enqueue it */
+ wq = &fnic->wq_copy[0];
+ ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
+ if (ret) {
+ /*
+ * In case another thread cancelled the request,
+ * refetch the pointer under the lock.
+ */
+ spinlock_t *io_lock = fnic_io_lock_hash(fnic, sc);
+
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ CMD_SP(sc) = NULL;
+ CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
+ spin_unlock_irqrestore(io_lock, flags);
+ if (io_req) {
+ fnic_release_ioreq_buf(fnic, io_req, sc);
+ mempool_free(io_req, fnic->io_req_pool);
+ }
+ }
+out:
+ /* acquire host lock before returning to SCSI */
+ spin_lock(lp->host->host_lock);
+ return ret;
+}
+
+/*
+ * fnic_fcpio_fw_reset_cmpl_handler
+ * Routine to handle fw reset completion
+ */
+static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
+ struct fcpio_fw_req *desc)
+{
+ u8 type;
+ u8 hdr_status;
+ struct fcpio_tag tag;
+ int ret = 0;
+ struct fc_frame *flogi;
+ unsigned long flags;
+
+ fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
+
+ /* Clean up all outstanding io requests */
+ fnic_cleanup_io(fnic, SCSI_NO_TAG);
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+
+ flogi = fnic->flogi;
+ fnic->flogi = NULL;
+
+ /* fnic should be in FC_TRANS_ETH_MODE */
+ if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
+ /* Check status of reset completion */
+ if (!hdr_status) {
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "reset cmpl success\n",
+ fnic->fnic_no);
+ /* Ready to send flogi out */
+ fnic->state = FNIC_IN_ETH_MODE;
+ } else {
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ DFX "fnic fw_reset : failed %s\n",
+ fnic->fnic_no,
+ fnic_fcpio_status_to_str(hdr_status));
+
+ /*
+ * Unable to change to eth mode, cannot send out flogi
+ * Change state to fc mode, so that subsequent Flogi
+ * requests from libFC will cause more attempts to
+ * reset the firmware. Free the cached flogi
+ */
+ fnic->state = FNIC_IN_FC_MODE;
+ ret = -1;
+ }
+ } else {
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ DFX "Unexpected state %s while processing"
+ " reset cmpl\n", fnic->fnic_no,
+ fnic_state_to_str(fnic->state));
+ ret = -1;
+ }
+
+ /* Thread removing device blocks till firmware reset is complete */
+ if (fnic->remove_wait)
+ complete(fnic->remove_wait);
+
+ /*
+ * If fnic is being removed, or fw reset failed
+ * free the flogi frame. Else, send it out
+ */
+ if (fnic->remove_wait || ret) {
+ fnic->flogi_oxid = FC_XID_UNKNOWN;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ if (flogi)
+ dev_kfree_skb_irq(fp_skb(flogi));
+ goto reset_cmpl_handler_end;
+ }
+
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ if (flogi)
+ ret = fnic_send_frame(fnic, flogi);
+
+ reset_cmpl_handler_end:
+ return ret;
+}
+
+/*
+ * fnic_fcpio_flogi_reg_cmpl_handler
+ * Routine to handle flogi register completion
+ */
+static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
+ struct fcpio_fw_req *desc)
+{
+ u8 type;
+ u8 hdr_status;
+ struct fcpio_tag tag;
+ struct fnic_event *event;
+ int ret = 0;
+ struct fc_frame *flogi_resp = NULL;
+ unsigned long flags;
+
+ fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
+
+ /* Update fnic state based on status of flogi reg completion */
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+
+ flogi_resp = fnic->flogi_resp;
+ fnic->flogi_resp = NULL;
+
+ if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
+
+ /* Check flogi registration completion status */
+ if (!hdr_status) {
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "flog reg succeeded\n",
+ fnic->fnic_no);
+ fnic->state = FNIC_IN_FC_MODE;
+ } else {
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ DFX "fnic flogi reg :failed %s\n",
+ fnic->fnic_no,
+ fnic_fcpio_status_to_str(hdr_status));
+ fnic->state = FNIC_IN_ETH_MODE;
+ ret = -1;
+ }
+ } else {
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "Unexpected fnic state %s while"
+ " processing flogi reg completion\n",
+ fnic->fnic_no, fnic_state_to_str(fnic->state));
+ ret = -1;
+ }
+
+ /* Successful flogi reg cmpl, pass frame to LibFC */
+ if (!ret && flogi_resp) {
+ if (fnic->stop_rx_link_events) {
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ goto reg_cmpl_handler_end;
+ }
+
+ event = kmem_cache_alloc(fnic_ev_cache, GFP_ATOMIC);
+
+ if (!event) {
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ dev_kfree_skb_irq(fp_skb(flogi_resp));
+ ret = -1;
+ goto reg_cmpl_handler_end;
+ }
+
+ memset(event, 0, sizeof(struct fnic_event));
+
+ /* initialize the event structure */
+ event->fp = flogi_resp;
+ fr_dev(flogi_resp) = fnic->lport;
+ event->fnic = fnic;
+ event->ev_type = EV_TYPE_FRAME;
+ event->is_flogi_resp_frame = 1;
+ fnic->event_count++;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ /* insert it into event queue */
+ INIT_WORK(&event->event_work, fnic_event_work);
+ queue_work(fnic_event_queue, &event->event_work);
+
+ } else {
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ if (flogi_resp)
+ dev_kfree_skb_irq(fp_skb(flogi_resp));
+ }
+
+reg_cmpl_handler_end:
+ return ret;
+}
+
+static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
+ u16 request_out)
+{
+ if (wq->to_clean_index <= wq->to_use_index) {
+ /* out of range, stale request_out index */
+ if (request_out < wq->to_clean_index ||
+ request_out >= wq->to_use_index)
+ return 0;
+ } else {
+ /* out of range, stale request_out index */
+ if (request_out < wq->to_clean_index &&
+ request_out >= wq->to_use_index)
+ return 0;
+ }
+ /* request_out index is in range */
+ return 1;
+}
+
+
+/*
+ * Mark that ack received and store the Ack index. If there are multiple
+ * acks received before Tx thread cleans it up, the latest value will be
+ * used which is correct behavior. This state should be in the copy Wq
+ * instead of in the fnic
+ */
+static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
+ unsigned int cq_index,
+ struct fcpio_fw_req *desc)
+{
+ struct vnic_wq_copy *wq;
+ u16 request_out = desc->u.ack.request_out;
+ unsigned long flags;
+
+ /* mark the ack state */
+ wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
+ spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
+
+ if (is_ack_index_in_range(wq, request_out)) {
+ fnic->fw_ack_index[0] = request_out;
+ fnic->fw_ack_recd[0] = 1;
+ }
+ spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
+}
+
+/*
+ * fnic_fcpio_icmnd_cmpl_handler
+ * Routine to handle icmnd completions
+ */
+static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
+ struct fcpio_fw_req *desc)
+{
+ u8 type;
+ u8 hdr_status;
+ struct fcpio_tag tag;
+ u32 id;
+ u64 xfer_len = 0;
+ struct fcpio_icmnd_cmpl *icmnd_cmpl;
+ struct fnic_io_req *io_req;
+ struct scsi_cmnd *sc;
+ unsigned long flags;
+ spinlock_t *io_lock;
+
+ /* Decode the cmpl description to get the io_req id */
+ fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
+ fcpio_tag_id_dec(&tag, &id);
+
+ if (id >= FNIC_MAX_IO_REQ)
+ return;
+
+ sc = scsi_host_find_tag(fnic->lport->host, id);
+ WARN_ON_ONCE(!sc);
+ if (!sc)
+ return;
+
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ WARN_ON_ONCE(!io_req);
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ return;
+ }
+
+ /* firmware completed the io */
+ io_req->io_completed = 1;
+
+ /*
+ * if SCSI-ML has already issued abort on this command,
+ * ignore completion of the IO. The abts path will clean it up
+ */
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
+ spin_unlock_irqrestore(io_lock, flags);
+ return;
+ }
+
+ /* Mark the IO as complete */
+ CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
+
+ icmnd_cmpl = &desc->u.icmnd_cmpl;
+
+ switch (hdr_status) {
+ case FCPIO_SUCCESS:
+ sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
+ xfer_len = scsi_bufflen(sc);
+ scsi_set_resid(sc, icmnd_cmpl->residual);
+
+ if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
+ xfer_len -= icmnd_cmpl->residual;
+
+ /*
+ * If queue_full, then try to reduce queue depth for all
+ * LUNS on the target. Todo: this should be accompanied
+ * by a periodic queue_depth rampup based on successful
+ * IO completion.
+ */
+ if (icmnd_cmpl->scsi_status == QUEUE_FULL) {
+ struct scsi_device *t_sdev;
+ int qd = 0;
+
+ shost_for_each_device(t_sdev, sc->device->host) {
+ if (t_sdev->id != sc->device->id)
+ continue;
+
+ if (t_sdev->queue_depth > 1) {
+ qd = scsi_track_queue_full
+ (t_sdev,
+ t_sdev->queue_depth - 1);
+ if (qd == -1)
+ qd = t_sdev->host->cmd_per_lun;
+ printk(KERN_INFO DFX "scsi[%d:%d:%d:%d"
+ "] queue full detected, new"
+ " depth = %d\n", fnic->fnic_no,
+ t_sdev->host->host_no,
+ t_sdev->channel, t_sdev->id,
+ t_sdev->lun,
+ t_sdev->queue_depth);
+ }
+ }
+ }
+ break;
+
+ case FCPIO_TIMEOUT: /* request was timed out */
+ sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
+ break;
+
+ case FCPIO_ABORTED: /* request was aborted */
+ sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
+ break;
+
+ case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
+ scsi_set_resid(sc, icmnd_cmpl->residual);
+ sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
+ break;
+
+ case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */
+ sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
+ break;
+ case FCPIO_INVALID_HEADER: /* header contains invalid data */
+ case FCPIO_INVALID_PARAM: /* some parameter in request invalid */
+ case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
+ case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */
+ case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */
+ case FCPIO_MSS_INVALID: /* request was aborted due to mss error */
+ case FCPIO_FW_ERR: /* request was terminated due fw error */
+ default:
+ printk(KERN_ERR DFX "hdr status = %s\n", fnic->fnic_no,
+ fnic_fcpio_status_to_str(hdr_status));
+ sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
+ break;
+ }
+
+ /* Break link with the SCSI command */
+ CMD_SP(sc) = NULL;
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ fnic_release_ioreq_buf(fnic, io_req, sc);
+
+ mempool_free(io_req, fnic->io_req_pool);
+
+ if (sc->sc_data_direction == DMA_FROM_DEVICE) {
+ fnic->lport->host_stats.fcp_input_requests++;
+ fnic->fcp_input_bytes += xfer_len;
+ } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
+ fnic->lport->host_stats.fcp_output_requests++;
+ fnic->fcp_output_bytes += xfer_len;
+ } else
+ fnic->lport->host_stats.fcp_control_requests++;
+
+ /* Call SCSI completion function to complete the IO */
+ if (sc->scsi_done)
+ sc->scsi_done(sc);
+
+}
+
+/* fnic_fcpio_itmf_cmpl_handler
+ * Routine to handle itmf completions
+ */
+static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
+ struct fcpio_fw_req *desc)
+{
+ u8 type;
+ u8 hdr_status;
+ struct fcpio_tag tag;
+ u32 id;
+ struct scsi_cmnd *sc;
+ struct fnic_io_req *io_req;
+ unsigned long flags;
+ spinlock_t *io_lock;
+
+ fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
+ fcpio_tag_id_dec(&tag, &id);
+
+ if ((id & FNIC_TAG_MASK) >= FNIC_MAX_IO_REQ)
+ return;
+
+ sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
+ WARN_ON_ONCE(!sc);
+ if (!sc)
+ return;
+
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ WARN_ON_ONCE(!io_req);
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ return;
+ }
+
+ if (id & FNIC_TAG_ABORT) {
+ /* Completion of abort cmd */
+ if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
+ /* This is a late completion. Ignore it */
+ spin_unlock_irqrestore(io_lock, flags);
+ return;
+ }
+ CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
+ CMD_ABTS_STATUS(sc) = hdr_status;
+
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ DFX "abts cmpl recd. id %d status %s\n",
+ fnic->fnic_no, (int)(id & FNIC_TAG_MASK),
+ fnic_fcpio_status_to_str(hdr_status));
+
+ /*
+ * If scsi_eh thread is blocked waiting for abts to complete,
+ * signal completion to it. IO will be cleaned in the thread
+ * else clean it in this context
+ */
+ if (io_req->abts_done) {
+ complete(io_req->abts_done);
+ spin_unlock_irqrestore(io_lock, flags);
+ } else {
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ DFX "abts cmpl, completing IO\n",
+ fnic->fnic_no);
+ CMD_SP(sc) = NULL;
+ sc->result = (DID_ERROR << 16);
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ fnic_release_ioreq_buf(fnic, io_req, sc);
+ mempool_free(io_req, fnic->io_req_pool);
+ if (sc->scsi_done)
+ sc->scsi_done(sc);
+ }
+
+ } else if (id & FNIC_TAG_DEV_RST) {
+ /* Completion of device reset */
+ CMD_LR_STATUS(sc) = hdr_status;
+ CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ DFX "dev reset cmpl recd. id %d status %s\n",
+ fnic->fnic_no, (int)(id & FNIC_TAG_MASK),
+ fnic_fcpio_status_to_str(hdr_status));
+ if (io_req->dr_done)
+ complete(io_req->dr_done);
+ spin_unlock_irqrestore(io_lock, flags);
+
+ } else {
+ printk(KERN_ERR DFX "Unexpected itmf io state %s tag %x\n",
+ fnic->fnic_no, fnic_ioreq_state_to_str(CMD_STATE(sc)),
+ id);
+ spin_unlock_irqrestore(io_lock, flags);
+ }
+
+}
+
+/*
+ * fnic_fcpio_cmpl_handler
+ * Routine to service the cq for wq_copy
+ */
+static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
+ unsigned int cq_index,
+ struct fcpio_fw_req *desc)
+{
+ struct fnic *fnic = vnic_dev_priv(vdev);
+ int ret = 0;
+
+ switch (desc->hdr.type) {
+ case FCPIO_ACK: /* fw copied copy wq desc to its queue */
+ fnic_fcpio_ack_handler(fnic, cq_index, desc);
+ break;
+
+ case FCPIO_ICMND_CMPL: /* fw completed a command */
+ fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
+ break;
+
+ case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
+ fnic_fcpio_itmf_cmpl_handler(fnic, desc);
+ break;
+
+ case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
+ ret = fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
+ break;
+
+ case FCPIO_RESET_CMPL: /* fw completed reset */
+ ret = fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
+ break;
+
+ default:
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "firmware completion type %d\n",
+ fnic->fnic_no, desc->hdr.type);
+ break;
+ }
+
+ return ret;
+}
+
+/*
+ * fnic_wq_copy_cmpl_handler
+ * Routine to process wq copy
+ */
+int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
+{
+ unsigned int wq_work_done = 0;
+ unsigned int i, cq_index;
+ unsigned int cur_work_done;
+
+ for (i = 0; i < fnic->wq_copy_count; i++) {
+ cq_index = i + fnic->raw_wq_count + fnic->rq_count;
+ cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
+ fnic_fcpio_cmpl_handler,
+ copy_work_to_do);
+ wq_work_done += cur_work_done;
+ }
+ return wq_work_done;
+}
+
+static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
+{
+ unsigned int i;
+ struct fnic_io_req *io_req;
+ unsigned long flags = 0;
+ struct scsi_cmnd *sc;
+ spinlock_t *io_lock;
+
+ for (i = 0; i < FNIC_MAX_IO_REQ; i++) {
+ if (i == exclude_id)
+ continue;
+
+ sc = scsi_host_find_tag(fnic->lport->host, i);
+ if (!sc)
+ continue;
+
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ goto cleanup_scsi_cmd;
+ }
+
+ CMD_SP(sc) = NULL;
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ /*
+ * If there is a scsi_cmnd associated with this io_req, then
+ * free the corresponding state
+ */
+ fnic_release_ioreq_buf(fnic, io_req, sc);
+ mempool_free(io_req, fnic->io_req_pool);
+
+cleanup_scsi_cmd:
+ sc->result = DID_TRANSPORT_DISRUPTED << 16;
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "fnic_cleanup_io:"
+ " DID_TRANSPORT_DISRUPTED\n", fnic->fnic_no);
+
+ /* Complete the command to SCSI */
+ if (sc->scsi_done)
+ sc->scsi_done(sc);
+ }
+}
+
+void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
+ struct fcpio_host_req *desc)
+{
+ u32 id;
+ struct fnic *fnic = vnic_dev_priv(wq->vdev);
+ struct fnic_io_req *io_req;
+ struct scsi_cmnd *sc;
+ unsigned long flags;
+ spinlock_t *io_lock;
+
+ /* get the tag reference */
+ fcpio_tag_id_dec(&desc->hdr.tag, &id);
+ id &= FNIC_TAG_MASK;
+
+ if (id >= FNIC_MAX_IO_REQ)
+ return;
+
+ sc = scsi_host_find_tag(fnic->lport->host, id);
+ if (!sc)
+ return;
+
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+
+ /* Get the IO context which this desc refers to */
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+
+ /* fnic interrupts are turned off by now */
+
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ goto wq_copy_cleanup_scsi_cmd;
+ }
+
+ CMD_SP(sc) = NULL;
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ fnic_release_ioreq_buf(fnic, io_req, sc);
+ mempool_free(io_req, fnic->io_req_pool);
+
+wq_copy_cleanup_scsi_cmd:
+ sc->result = DID_NO_CONNECT << 16;
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "wq_copy_cleanup_handler:"
+ " DID_NO_CONNECT\n", fnic->fnic_no);
+
+ if (sc->scsi_done)
+ sc->scsi_done(sc);
+}
+
+static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
+ u32 task_req, u8 *fc_lun,
+ struct fnic_io_req *io_req)
+{
+ struct vnic_wq_copy *wq = &fnic->wq_copy[0];
+ unsigned long flags;
+
+ spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
+
+ if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
+ free_wq_copy_descs(fnic, wq);
+
+ if (!vnic_wq_copy_desc_avail(wq)) {
+ spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
+ return 1;
+ }
+ fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
+ 0, task_req, tag, fc_lun, io_req->port_id,
+ fnic->config.ra_tov, fnic->config.ed_tov);
+
+ spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
+ return 0;
+}
+
+void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
+{
+ int tag;
+ struct fnic_io_req *io_req;
+ spinlock_t *io_lock;
+ unsigned long flags;
+ struct scsi_cmnd *sc;
+ struct scsi_lun fc_lun;
+ enum fnic_ioreq_state old_ioreq_state;
+
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ DFX "fnic_rport_reset_exch called portid 0x%06x\n",
+ fnic->fnic_no, port_id);
+
+ if (fnic->in_remove)
+ return;
+
+ for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
+ sc = scsi_host_find_tag(fnic->lport->host, tag);
+ if (!sc)
+ continue;
+
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+
+ if (!io_req || io_req->port_id != port_id) {
+ spin_unlock_irqrestore(io_lock, flags);
+ continue;
+ }
+
+ /*
+ * Found IO that is still pending with firmware and
+ * belongs to rport that went away
+ */
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
+ spin_unlock_irqrestore(io_lock, flags);
+ continue;
+ }
+ old_ioreq_state = CMD_STATE(sc);
+ CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
+ CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
+
+ BUG_ON(io_req->abts_done);
+
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ DFX "fnic_rport_reset_exch: Issuing abts\n",
+ fnic->fnic_no);
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ /* Now queue the abort command to firmware */
+ int_to_scsilun(sc->device->lun, &fc_lun);
+
+ if (fnic_queue_abort_io_req(fnic, tag,
+ FCPIO_ITMF_ABT_TASK_TERM,
+ fc_lun.scsi_lun, io_req)) {
+ /*
+ * Revert the cmd state back to old state, if
+ * it hasnt changed in between. This cmd will get
+ * aborted later by scsi_eh, or cleaned up during
+ * lun reset
+ */
+ io_lock = fnic_io_lock_hash(fnic, sc);
+
+ spin_lock_irqsave(io_lock, flags);
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
+ CMD_STATE(sc) = old_ioreq_state;
+ spin_unlock_irqrestore(io_lock, flags);
+ }
+ }
+
+}
+
+void fnic_terminate_rport_io(struct fc_rport *rport)
+{
+ int tag;
+ struct fnic_io_req *io_req;
+ spinlock_t *io_lock;
+ unsigned long flags;
+ struct scsi_cmnd *sc;
+ struct scsi_lun fc_lun;
+ struct fc_rport_libfc_priv *rdata = rport->dd_data;
+ struct fc_lport *lport = rdata->local_port;
+ struct fnic *fnic = lport_priv(lport);
+ struct fc_rport *cmd_rport;
+ enum fnic_ioreq_state old_ioreq_state;
+
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ DFX "fnic_terminate_rport_io called"
+ " wwpn 0x%llx, wwnn0x%llx, portid 0x%06x\n",
+ fnic->fnic_no, rport->port_name, rport->node_name,
+ rport->port_id);
+
+ if (fnic->in_remove)
+ return;
+
+ for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
+ sc = scsi_host_find_tag(fnic->lport->host, tag);
+ if (!sc)
+ continue;
+
+ cmd_rport = starget_to_rport(scsi_target(sc->device));
+ if (rport != cmd_rport)
+ continue;
+
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+
+ if (!io_req || rport != cmd_rport) {
+ spin_unlock_irqrestore(io_lock, flags);
+ continue;
+ }
+
+ /*
+ * Found IO that is still pending with firmware and
+ * belongs to rport that went away
+ */
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
+ spin_unlock_irqrestore(io_lock, flags);
+ continue;
+ }
+ old_ioreq_state = CMD_STATE(sc);
+ CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
+ CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
+
+ BUG_ON(io_req->abts_done);
+
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ DFX "fnic_terminate_rport_io: Issuing abts\n",
+ fnic->fnic_no);
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ /* Now queue the abort command to firmware */
+ int_to_scsilun(sc->device->lun, &fc_lun);
+
+ if (fnic_queue_abort_io_req(fnic, tag,
+ FCPIO_ITMF_ABT_TASK_TERM,
+ fc_lun.scsi_lun, io_req)) {
+ /*
+ * Revert the cmd state back to old state, if
+ * it hasnt changed in between. This cmd will get
+ * aborted later by scsi_eh, or cleaned up during
+ * lun reset
+ */
+ io_lock = fnic_io_lock_hash(fnic, sc);
+
+ spin_lock_irqsave(io_lock, flags);
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
+ CMD_STATE(sc) = old_ioreq_state;
+ spin_unlock_irqrestore(io_lock, flags);
+ }
+ }
+
+}
+
+static void fnic_block_error_handler(struct scsi_cmnd *sc)
+{
+ struct Scsi_Host *shost = sc->device->host;
+ struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
+ unsigned long flags;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ while (rport->port_state == FC_PORTSTATE_BLOCKED) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ msleep(1000);
+ spin_lock_irqsave(shost->host_lock, flags);
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+}
+
+/*
+ * This function is exported to SCSI for sending abort cmnds.
+ * A SCSI IO is represented by a io_req in the driver.
+ * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
+ */
+int fnic_abort_cmd(struct scsi_cmnd *sc)
+{
+ struct fc_lport *lp;
+ struct fnic *fnic;
+ struct fnic_io_req *io_req;
+ struct fc_rport *rport;
+ spinlock_t *io_lock;
+ unsigned long flags;
+ int ret = SUCCESS;
+ u32 task_req;
+ struct scsi_lun fc_lun;
+ DECLARE_COMPLETION_ONSTACK(tm_done);
+
+ /* Wait for rport to unblock */
+ fnic_block_error_handler(sc);
+
+ /* Get local-port, check ready and link up */
+ lp = shost_priv(sc->device->host);
+
+ fnic = lport_priv(lp);
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ DFX "Abort Cmd called FCID 0x%x, LUN 0x%x TAG %d\n",
+ fnic->fnic_no,
+ (starget_to_rport(scsi_target(sc->device)))->port_id,
+ sc->device->lun, sc->request->tag);
+
+ if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
+ ret = FAILED;
+ goto fnic_abort_cmd_end;
+ }
+
+ /*
+ * Avoid a race between SCSI issuing the abort and the device
+ * completing the command.
+ *
+ * If the command is already completed by the fw cmpl code,
+ * we just return SUCCESS from here. This means that the abort
+ * succeeded. In the SCSI ML, since the timeout for command has
+ * happened, the completion wont actually complete the command
+ * and it will be considered as an aborted command
+ *
+ * The CMD_SP will not be cleared except while holding io_req_lock.
+ */
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ goto fnic_abort_cmd_end;
+ }
+
+ io_req->abts_done = &tm_done;
+
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
+ spin_unlock_irqrestore(io_lock, flags);
+ goto wait_pending;
+ }
+ /*
+ * Command is still pending, need to abort it
+ * If the firmware completes the command after this point,
+ * the completion wont be done till mid-layer, since abort
+ * has already started.
+ */
+ CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
+ CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ /*
+ * Check readiness of the remote port. If the path to remote
+ * port is up, then send abts to the remote port to terminate
+ * the IO. Else, just locally terminate the IO in the firmware
+ */
+ rport = starget_to_rport(scsi_target(sc->device));
+ if (fc_remote_port_chkready(rport) == 0)
+ task_req = FCPIO_ITMF_ABT_TASK;
+ else
+ task_req = FCPIO_ITMF_ABT_TASK_TERM;
+
+ /* Now queue the abort command to firmware */
+ int_to_scsilun(sc->device->lun, &fc_lun);
+
+ if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req,
+ fc_lun.scsi_lun, io_req)) {
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if (io_req)
+ io_req->abts_done = NULL;
+ spin_unlock_irqrestore(io_lock, flags);
+ ret = FAILED;
+ goto fnic_abort_cmd_end;
+ }
+
+ /*
+ * We queued an abort IO, wait for its completion.
+ * Once the firmware completes the abort command, it will
+ * wake up this thread.
+ */
+ wait_pending:
+ wait_for_completion_timeout(&tm_done,
+ msecs_to_jiffies
+ (2 * fnic->config.ra_tov +
+ fnic->config.ed_tov));
+
+ /* Check the abort status */
+ spin_lock_irqsave(io_lock, flags);
+
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ ret = FAILED;
+ goto fnic_abort_cmd_end;
+ }
+ io_req->abts_done = NULL;
+
+ /* fw did not complete abort, timed out */
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
+ spin_unlock_irqrestore(io_lock, flags);
+ ret = FAILED;
+ goto fnic_abort_cmd_end;
+ }
+
+ /*
+ * firmware completed the abort, check the status,
+ * free the io_req irrespective of failure or success
+ */
+ if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS)
+ ret = FAILED;
+
+ CMD_SP(sc) = NULL;
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ fnic_release_ioreq_buf(fnic, io_req, sc);
+ mempool_free(io_req, fnic->io_req_pool);
+
+fnic_abort_cmd_end:
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "Returning from abort cmd %s\n",
+ fnic->fnic_no, (ret == SUCCESS) ?
+ "SUCCESS" : "FAILED");
+ return ret;
+}
+
+static inline int fnic_queue_dr_io_req(struct fnic *fnic,
+ struct scsi_cmnd *sc,
+ struct fnic_io_req *io_req)
+{
+ struct vnic_wq_copy *wq = &fnic->wq_copy[0];
+ struct scsi_lun fc_lun;
+ int ret = 0;
+ unsigned long intr_flags;
+
+ spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
+
+ if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
+ free_wq_copy_descs(fnic, wq);
+
+ if (!vnic_wq_copy_desc_avail(wq)) {
+ ret = -EAGAIN;
+ goto lr_io_req_end;
+ }
+
+ /* fill in the lun info */
+ int_to_scsilun(sc->device->lun, &fc_lun);
+
+ fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST,
+ 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
+ fc_lun.scsi_lun, io_req->port_id,
+ fnic->config.ra_tov, fnic->config.ed_tov);
+
+lr_io_req_end:
+ spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
+
+ return ret;
+}
+
+/*
+ * Clean up any pending aborts on the lun
+ * For each outstanding IO on this lun, whose abort is not completed by fw,
+ * issue a local abort. Wait for abort to complete. Return 0 if all commands
+ * successfully aborted, 1 otherwise
+ */
+static int fnic_clean_pending_aborts(struct fnic *fnic,
+ struct scsi_cmnd *lr_sc)
+{
+ int tag;
+ struct fnic_io_req *io_req;
+ spinlock_t *io_lock;
+ unsigned long flags;
+ int ret = 0;
+ struct scsi_cmnd *sc;
+ struct fc_rport *rport;
+ struct scsi_lun fc_lun;
+ struct scsi_device *lun_dev = lr_sc->device;
+ DECLARE_COMPLETION_ONSTACK(tm_done);
+
+ for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
+ sc = scsi_host_find_tag(fnic->lport->host, tag);
+ /*
+ * ignore this lun reset cmd or cmds that do not belong to
+ * this lun
+ */
+ if (!sc || sc == lr_sc || sc->device != lun_dev)
+ continue;
+
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+
+ if (!io_req || sc->device != lun_dev) {
+ spin_unlock_irqrestore(io_lock, flags);
+ continue;
+ }
+
+ /*
+ * Found IO that is still pending with firmware and
+ * belongs to the LUN that we are resetting
+ */
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "Found IO in %s on lun\n",
+ fnic->fnic_no,
+ fnic_ioreq_state_to_str(CMD_STATE(sc)));
+
+ BUG_ON(CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING);
+
+ CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
+ io_req->abts_done = &tm_done;
+ spin_unlock_irqrestore(io_lock, flags);
+
+ /* Now queue the abort command to firmware */
+ int_to_scsilun(sc->device->lun, &fc_lun);
+ rport = starget_to_rport(scsi_target(sc->device));
+
+ if (fnic_queue_abort_io_req(fnic, tag,
+ FCPIO_ITMF_ABT_TASK_TERM,
+ fc_lun.scsi_lun, io_req)) {
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if (io_req)
+ io_req->abts_done = NULL;
+ spin_unlock_irqrestore(io_lock, flags);
+ ret = 1;
+ goto clean_pending_aborts_end;
+ }
+
+ wait_for_completion_timeout(&tm_done,
+ msecs_to_jiffies
+ (fnic->config.ed_tov));
+
+ /* Recheck cmd state to check if it is now aborted */
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ ret = 1;
+ goto clean_pending_aborts_end;
+ }
+
+ io_req->abts_done = NULL;
+
+ /* if abort is still pending with fw, fail */
+ if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
+ spin_unlock_irqrestore(io_lock, flags);
+ ret = 1;
+ goto clean_pending_aborts_end;
+ }
+ CMD_SP(sc) = NULL;
+ spin_unlock_irqrestore(io_lock, flags);
+
+ fnic_release_ioreq_buf(fnic, io_req, sc);
+ mempool_free(io_req, fnic->io_req_pool);
+ }
+
+clean_pending_aborts_end:
+ return ret;
+}
+
+/*
+ * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
+ * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
+ * on the LUN.
+ */
+int fnic_device_reset(struct scsi_cmnd *sc)
+{
+ struct fc_lport *lp;
+ struct fnic *fnic;
+ struct fnic_io_req *io_req;
+ struct fc_rport *rport;
+ int status;
+ int ret = FAILED;
+ spinlock_t *io_lock;
+ unsigned long flags;
+ DECLARE_COMPLETION_ONSTACK(tm_done);
+
+ /* Wait for rport to unblock */
+ fnic_block_error_handler(sc);
+
+ /* Get local-port, check ready and link up */
+ lp = shost_priv(sc->device->host);
+
+ fnic = lport_priv(lp);
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ DFX "Device reset called FCID 0x%x, LUN 0x%x\n",
+ fnic->fnic_no,
+ (starget_to_rport(scsi_target(sc->device)))->port_id,
+ sc->device->lun);
+
+
+ if (lp->state != LPORT_ST_READY || !(lp->link_up))
+ goto fnic_device_reset_end;
+
+ /* Check if remote port up */
+ rport = starget_to_rport(scsi_target(sc->device));
+ if (fc_remote_port_chkready(rport))
+ goto fnic_device_reset_end;
+
+ io_lock = fnic_io_lock_hash(fnic, sc);
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+
+ /*
+ * If there is a io_req attached to this command, then use it,
+ * else allocate a new one.
+ */
+ if (!io_req) {
+ io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ goto fnic_device_reset_end;
+ }
+ memset(io_req, 0, sizeof(*io_req));
+ io_req->port_id = rport->port_id;
+ CMD_SP(sc) = (char *)io_req;
+ }
+ io_req->dr_done = &tm_done;
+ CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
+ CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
+ spin_unlock_irqrestore(io_lock, flags);
+
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "TAG %d\n",
+ fnic->fnic_no, sc->request->tag);
+
+ /*
+ * issue the device reset, if enqueue failed, clean up the ioreq
+ * and break assoc with scsi cmd
+ */
+ if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if (io_req)
+ io_req->dr_done = NULL;
+ goto fnic_device_reset_clean;
+ }
+
+ /*
+ * Wait on the local completion for LUN reset. The io_req may be
+ * freed while we wait since we hold no lock.
+ */
+ wait_for_completion_timeout(&tm_done,
+ msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
+
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if (!io_req) {
+ spin_unlock_irqrestore(io_lock, flags);
+ goto fnic_device_reset_end;
+ }
+ io_req->dr_done = NULL;
+
+ status = CMD_LR_STATUS(sc);
+ spin_unlock_irqrestore(io_lock, flags);
+
+ /*
+ * If lun reset not completed, bail out with failed. io_req
+ * gets cleaned up during higher levels of EH
+ */
+ if (status == FCPIO_INVALID_CODE) {
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "Device reset timed out\n",
+ fnic->fnic_no);
+ goto fnic_device_reset_end;
+ }
+
+ /* Completed, but not successful, clean up the io_req, return fail */
+ if (status != FCPIO_SUCCESS) {
+ spin_lock_irqsave(io_lock, flags);
+ FNIC_SCSI_DBG(KERN_DEBUG,
+ DFX "Device reset completed - failed\n",
+ fnic->fnic_no);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ goto fnic_device_reset_clean;
+ }
+
+ /*
+ * Clean up any aborts on this lun that have still not
+ * completed. If any of these fail, then LUN reset fails.
+ * clean_pending_aborts cleans all cmds on this lun except
+ * the lun reset cmd. If all cmds get cleaned, the lun reset
+ * succeeds
+ */
+ if (fnic_clean_pending_aborts(fnic, sc)) {
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "Device reset failed"
+ " since could not abort all IOs\n",
+ fnic->fnic_no);
+ goto fnic_device_reset_clean;
+ }
+
+ /* Clean lun reset command */
+ spin_lock_irqsave(io_lock, flags);
+ io_req = (struct fnic_io_req *)CMD_SP(sc);
+ if (io_req)
+ /* Completed, and successful */
+ ret = SUCCESS;
+
+fnic_device_reset_clean:
+ if (io_req)
+ CMD_SP(sc) = NULL;
+
+ spin_unlock_irqrestore(io_lock, flags);
+
+ if (io_req) {
+ fnic_release_ioreq_buf(fnic, io_req, sc);
+ mempool_free(io_req, fnic->io_req_pool);
+ }
+
+fnic_device_reset_end:
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "Returning from device reset %s\n",
+ fnic->fnic_no, (ret == SUCCESS) ?
+ "SUCCESS" : "FAILED");
+ return ret;
+}
+
+/* Clean up all IOs, clean up libFC local port */
+int fnic_reset(struct Scsi_Host *shost)
+{
+ struct fc_lport *lp;
+ struct fnic *fnic;
+ int ret = SUCCESS;
+
+ lp = shost_priv(shost);
+ fnic = lport_priv(lp);
+
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "fnic_reset called\n", fnic->fnic_no);
+
+ /*
+ * Reset local port, this will clean up libFC exchanges,
+ * reset remote port sessions, and if link is up, begin flogi
+ */
+ if (lp->tt.lport_reset(lp))
+ ret = FAILED;
+
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "Returning from fnic reset %s\n",
+ fnic->fnic_no, (ret == SUCCESS) ?
+ "SUCCESS" : "FAILED");
+
+ return ret;
+}
+
+/*
+ * SCSI Error handling calls driver's eh_host_reset if all prior
+ * error handling levels return FAILED. If host reset completes
+ * successfully, and if link is up, then Fabric login begins.
+ *
+ * Host Reset is the highest level of error recovery. If this fails, then
+ * host is offlined by SCSI.
+ *
+ */
+int fnic_host_reset(struct scsi_cmnd *sc)
+{
+ int ret;
+ unsigned long wait_host_tmo;
+ struct Scsi_Host *shost = sc->device->host;
+ struct fc_lport *lp = shost_priv(shost);
+
+ /*
+ * If fnic_reset is successful, wait for fabric login to complete
+ * scsi-ml tries to send a TUR to every device if host reset is
+ * successful, so before returning to scsi, fabric should be up
+ */
+ ret = fnic_reset(shost);
+
+ if (ret == SUCCESS) {
+ wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
+ ret = FAILED;
+ while (time_before(jiffies, wait_host_tmo)) {
+ if ((lp->state == LPORT_ST_READY) &&
+ (lp->link_up)) {
+ ret = SUCCESS;
+ break;
+ }
+ ssleep(1);
+ }
+ }
+
+ return ret;
+}
+
+/*
+ * This fxn is called from libFC when host is removed
+ */
+void fnic_scsi_abort_io(struct fc_lport *lp)
+{
+ int err = 0;
+ unsigned long flags;
+ enum fnic_state old_state;
+ struct fnic *fnic = lport_priv(lp);
+ DECLARE_COMPLETION_ONSTACK(remove_wait);
+
+ /* Issue firmware reset for fnic, wait for reset to complete */
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ fnic->remove_wait = &remove_wait;
+ old_state = fnic->state;
+ fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
+ vnic_dev_del_addr(fnic->vdev, fnic->data_src_addr);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ err = fnic_fw_reset_handler(fnic);
+ if (err) {
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
+ fnic->state = old_state;
+ fnic->remove_wait = NULL;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ return;
+ }
+
+ /* Wait for firmware reset to complete */
+ wait_for_completion_timeout(&remove_wait,
+ msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ fnic->remove_wait = NULL;
+ FNIC_SCSI_DBG(KERN_DEBUG, DFX "fnic_scsi_abort_io %s\n", fnic->fnic_no,
+ (fnic->state == FNIC_IN_ETH_MODE) ?
+ "SUCCESS" : "FAILED");
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+}
+
+/*
+ * This fxn called from libFC to clean up driver IO state on link down
+ */
+void fnic_scsi_cleanup(struct fc_lport *lp)
+{
+ unsigned long flags;
+ enum fnic_state old_state;
+ struct fnic *fnic = lport_priv(lp);
+
+ /* issue fw reset */
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ old_state = fnic->state;
+ fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
+ vnic_dev_del_addr(fnic->vdev, fnic->data_src_addr);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ if (fnic_fw_reset_handler(fnic)) {
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
+ fnic->state = old_state;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ }
+
+}
+
+void fnic_empty_scsi_cleanup(struct fc_lport *lp)
+{
+}
+
+void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
+{
+ struct fnic *fnic = lport_priv(lp);
+
+ /* Non-zero sid, nothing to do */
+ if (sid)
+ goto call_fc_exch_mgr_reset;
+
+ if (did) {
+ fnic_rport_exch_reset(fnic, did);
+ goto call_fc_exch_mgr_reset;
+ }
+
+ /*
+ * sid = 0, did = 0
+ * link down or device being removed
+ */
+ if (!fnic->in_remove)
+ fnic_scsi_cleanup(lp);
+ else
+ fnic_scsi_abort_io(lp);
+
+ /* call libFC exch mgr reset to reset its exchanges */
+call_fc_exch_mgr_reset:
+ fc_exch_mgr_reset(lp, sid, did);
+
+}
^ permalink raw reply related [flat|nested] 13+ messages in thread* Re: [RFC][PATCH 2/6] fnic: add SCSI FCP handling
2009-02-28 2:32 ` [RFC][PATCH 2/6] fnic: add SCSI FCP handling Abhijeet Joglekar
@ 2009-03-12 20:27 ` Mike Christie
0 siblings, 0 replies; 13+ messages in thread
From: Mike Christie @ 2009-03-12 20:27 UTC (permalink / raw)
To: Abhijeet Joglekar; +Cc: james.bottomley, linux-scsi, jeykholt
Abhijeet Joglekar wrote:
> +
> +struct fcpio_lunmap_tbl {
> + u32 update_cnt;
> + struct fcpio_lunmap_entry lunmaps[FCPIO_LUNMAP_TABLE_SIZE];
> +};
I think this is not used now. You can delete the code related to it.
> +
> +/*
> + * fnic_fcpio_flogi_reg_cmpl_handler
> + * Routine to handle flogi register completion
> + */
> +static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
> + struct fcpio_fw_req *desc)
> +{
> + u8 type;
> + u8 hdr_status;
> + struct fcpio_tag tag;
> + struct fnic_event *event;
> + int ret = 0;
> + struct fc_frame *flogi_resp = NULL;
> + unsigned long flags;
> +
> + fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
> +
> + /* Update fnic state based on status of flogi reg completion */
> + spin_lock_irqsave(&fnic->fnic_lock, flags);
> +
> + flogi_resp = fnic->flogi_resp;
> + fnic->flogi_resp = NULL;
> +
> + if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
> +
> + /* Check flogi registration completion status */
> + if (!hdr_status) {
> + FNIC_SCSI_DBG(KERN_DEBUG, DFX "flog reg succeeded\n",
> + fnic->fnic_no);
> + fnic->state = FNIC_IN_FC_MODE;
> + } else {
> + FNIC_SCSI_DBG(KERN_DEBUG,
> + DFX "fnic flogi reg :failed %s\n",
> + fnic->fnic_no,
> + fnic_fcpio_status_to_str(hdr_status));
> + fnic->state = FNIC_IN_ETH_MODE;
> + ret = -1;
> + }
> + } else {
> + FNIC_SCSI_DBG(KERN_DEBUG, DFX "Unexpected fnic state %s while"
> + " processing flogi reg completion\n",
> + fnic->fnic_no, fnic_state_to_str(fnic->state));
> + ret = -1;
> + }
> +
> + /* Successful flogi reg cmpl, pass frame to LibFC */
> + if (!ret && flogi_resp) {
> + if (fnic->stop_rx_link_events) {
> + spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> + goto reg_cmpl_handler_end;
> + }
> +
> + event = kmem_cache_alloc(fnic_ev_cache, GFP_ATOMIC);
> +
> + if (!event) {
> + spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> + dev_kfree_skb_irq(fp_skb(flogi_resp));
> + ret = -1;
> + goto reg_cmpl_handler_end;
> + }
> +
> + memset(event, 0, sizeof(struct fnic_event));
> +
> + /* initialize the event structure */
> + event->fp = flogi_resp;
> + fr_dev(flogi_resp) = fnic->lport;
> + event->fnic = fnic;
> + event->ev_type = EV_TYPE_FRAME;
> + event->is_flogi_resp_frame = 1;
> + fnic->event_count++;
> + spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> +
> + /* insert it into event queue */
> + INIT_WORK(&event->event_work, fnic_event_work);
> + queue_work(fnic_event_queue, &event->event_work);
> +
> + } else {
> + spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> + if (flogi_resp)
> + dev_kfree_skb_irq(fp_skb(flogi_resp));
> + }
> +
> +reg_cmpl_handler_end:
> + return ret;
> +}
What happens if this fails? Is this run when we relogin? It seems
dangerous if there is memory pressure, pages were getting written out to
this driver to free up mem, and if something bad happened and we had
to relogin. If it fails are we stuck? Will something figure this out and
retry? What about preallacting one event for this? Would that work? Or
what about allocating the event in the fnic then just queueing the work
here.
Block/scsi driver/code preallocate pretty much everything they need to
make forward progress on at least one request. For relogin like this
though, it seems like some drivers/code does not care, or we are getting
careless or it is a lot of work and ugly code to make it work. So I am
not sure if you have to handle the allocation failure here or not. Maybe
we just have to do this in the main IO path.
> +
> +void fnic_empty_scsi_cleanup(struct fc_lport *lp)
> +{
> +}
> +
This is kind of odd. I guess I will leave it to you and Rob to discuss
if that is how libfc is supposed to be used or if libfc should be
modified to handle where you do not want the callout and do not want the
default libfc gives you.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [RFC][PATCH 3/6] fnic: Add support for Fibre Channel Services through libFC
2009-02-28 2:31 [PATCH 0/6] FCoE HBA Driver (fnic) for 2.6.30 feature window Abhijeet Joglekar
2009-02-28 2:31 ` [RFC][PATCH 1/6] fnic: add main file with module infrastructure, fnic structure, Makefile Abhijeet Joglekar
2009-02-28 2:32 ` [RFC][PATCH 2/6] fnic: add SCSI FCP handling Abhijeet Joglekar
@ 2009-02-28 2:32 ` Abhijeet Joglekar
2009-03-12 20:36 ` Mike Christie
2009-02-28 2:32 ` [RFC][PATCH 4/6] fnic: adds resource allocation, interupt interfaces Abhijeet Joglekar
` (2 subsequent siblings)
5 siblings, 1 reply; 13+ messages in thread
From: Abhijeet Joglekar @ 2009-02-28 2:32 UTC (permalink / raw)
To: james.bottomley, linux-scsi; +Cc: abjoglek, jeykholt
fnic: Add support for Fibre Channel Services through libFC
fnic_fcs.c: adds support for sending/receiving FCS frames in Ethernet and
FC mode. Interacfaces with libFC, passes link events and frames to/from
libFC.
fnic_attr.c: exposes host state, link state, driver version in SysFS
Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com>
---
drivers/scsi/fnic/fnic_attrs.c | 71 ++++
drivers/scsi/fnic/fnic_fcs.c | 719 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 790 insertions(+), 0 deletions(-)
create mode 100644 drivers/scsi/fnic/fnic_attrs.c
create mode 100644 drivers/scsi/fnic/fnic_fcs.c
diff --git a/drivers/scsi/fnic/fnic_attrs.c b/drivers/scsi/fnic/fnic_attrs.c
new file mode 100644
index 0000000..8144018
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_attrs.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/skbuff.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/kthread.h>
+#include <linux/device.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include "vnic_dev.h"
+#include "vnic_intr.h"
+#include "vnic_stats.h"
+#include "fnic_io.h"
+#include "fnic.h"
+
+static ssize_t fnic_show_state(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fc_lport *lp = shost_priv(class_to_shost(dev));
+ struct fnic *fnic = lport_priv(lp);
+
+ return snprintf(buf, PAGE_SIZE, "%s\n", fnic_state_str[fnic->state]);
+}
+
+static ssize_t fnic_show_drv_version(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%s\n", DRV_VERSION);
+}
+
+static ssize_t fnic_show_link_state(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fc_lport *lp = shost_priv(class_to_shost(dev));
+
+ return snprintf(buf, PAGE_SIZE, "%s\n", (lp->link_up)
+ ? "Link Up" : "Link Down");
+}
+
+static DEVICE_ATTR(fnic_state, S_IRUGO, fnic_show_state, NULL);
+static DEVICE_ATTR(drv_version, S_IRUGO, fnic_show_drv_version, NULL);
+static DEVICE_ATTR(link_state, S_IRUGO, fnic_show_link_state, NULL);
+
+struct device_attribute *fnic_attrs[] = {
+ &dev_attr_fnic_state,
+ &dev_attr_drv_version,
+ &dev_attr_link_state,
+ NULL,
+};
diff --git a/drivers/scsi/fnic/fnic_fcs.c b/drivers/scsi/fnic/fnic_fcs.c
new file mode 100644
index 0000000..67fc80e
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_fcs.c
@@ -0,0 +1,719 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/skbuff.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/workqueue.h>
+#include <scsi/fc/fc_els.h>
+#include <scsi/fc/fc_fcoe.h>
+#include <scsi/fc_frame.h>
+#include <scsi/libfc.h>
+#include "fnic_io.h"
+#include "fnic.h"
+#include "cq_enet_desc.h"
+#include "cq_exch_desc.h"
+
+struct workqueue_struct *fnic_event_queue;
+
+/*
+ * This function passes events and incoming fabric frames to libFC
+ */
+void fnic_event_work(struct work_struct *work)
+{
+ struct fnic_event *event =
+ container_of(work, struct fnic_event, event_work);
+ struct fnic *fnic = event->fnic;
+ struct fc_lport *lp = fnic->lport;
+ unsigned long flags;
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+
+ if (fnic->stop_rx_link_events) {
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ if (event->ev_type == EV_TYPE_FRAME)
+ dev_kfree_skb_irq(fp_skb(event->fp));
+ kmem_cache_free(fnic_ev_cache, event);
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ fnic->event_count--;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ return;
+ }
+
+ switch (event->ev_type) {
+ case EV_TYPE_FRAME:
+ if (event->is_flogi_resp_frame)
+ vnic_dev_add_addr(fnic->vdev,
+ fnic->data_src_addr);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ fc_exch_recv(lp, lp->emp, event->fp);
+ break;
+ case EV_TYPE_LINK_UP:
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ fc_linkup(lp);
+ break;
+ case EV_TYPE_LINK_DOWN:
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ fc_linkdown(lp);
+ break;
+ default:
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ break;
+ }
+
+ kmem_cache_free(fnic_ev_cache, event);
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ fnic->event_count--;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+}
+
+static inline void fnic_import_rq_fc_frame(struct sk_buff *skb,
+ u32 len, u8 sof, u8 eof)
+{
+ struct fc_frame *fp = (struct fc_frame *)skb;
+
+ skb_trim(skb, len);
+ fr_eof(fp) = eof;
+ fr_sof(fp) = sof;
+}
+
+
+static inline int fnic_import_rq_eth_pkt(struct sk_buff *skb, u32 len)
+{
+ struct fc_frame *fp;
+ struct ethhdr *eh;
+ struct vlan_ethhdr *vh;
+ struct fcoe_hdr *fcoe_hdr;
+ struct fcoe_crc_eof *ft;
+ u32 transport_len = 0;
+
+ eh = (struct ethhdr *)skb->data;
+ vh = (struct vlan_ethhdr *)skb->data;
+ if (vh->h_vlan_proto == htons(ETH_P_8021Q) &&
+ vh->h_vlan_encapsulated_proto == htons(ETH_P_FCOE)) {
+ skb_pull(skb, sizeof(struct vlan_ethhdr));
+ transport_len += sizeof(struct vlan_ethhdr);
+ } else if (eh->h_proto == htons(ETH_P_FCOE)) {
+ transport_len += sizeof(struct ethhdr);
+ skb_pull(skb, sizeof(struct ethhdr));
+ } else
+ return -1;
+
+ fcoe_hdr = (struct fcoe_hdr *)skb->data;
+ if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER)
+ return -1;
+
+ fp = (struct fc_frame *)skb;
+ fc_frame_init(fp);
+ fr_sof(fp) = fcoe_hdr->fcoe_sof;
+ skb_pull(skb, sizeof(struct fcoe_hdr));
+ transport_len += sizeof(struct fcoe_hdr);
+
+ ft = (struct fcoe_crc_eof *)(skb->data + len -
+ transport_len - sizeof(*ft));
+ fr_eof(fp) = ft->fcoe_eof;
+ skb_trim(skb, len - transport_len - sizeof(*ft));
+ return 0;
+}
+
+static inline int fnic_handle_flogi_resp(struct fnic *fnic,
+ struct fc_frame *fp)
+{
+ u8 mac[ETH_ALEN] = FC_FCOE_FLOGI_MAC;
+ struct ethhdr *eth_hdr;
+ struct fc_frame_header *fh;
+ int ret = 0;
+ unsigned long flags;
+ struct fc_frame *old_flogi_resp = NULL;
+
+ fh = (struct fc_frame_header *)fr_hdr(fp);
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+
+ if (fnic->state == FNIC_IN_ETH_MODE) {
+
+ /*
+ * Check if oxid matches on taking the lock. A new Flogi
+ * issued by libFC might have changed the fnic cached oxid
+ */
+ if (fnic->flogi_oxid != ntohs(fh->fh_ox_id)) {
+ FNIC_FCS_DBG(KERN_DEBUG, DFX "Flogi response oxid not"
+ " matching cached oxid, dropping frame"
+ "\n", fnic->fnic_no);
+ ret = -1;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ dev_kfree_skb_irq(fp_skb(fp));
+ goto handle_flogi_resp_end;
+ }
+
+ /* Drop older cached flogi response frame, cache this frame */
+ old_flogi_resp = fnic->flogi_resp;
+ fnic->flogi_resp = fp;
+ fnic->flogi_oxid = FC_XID_UNKNOWN;
+
+ /*
+ * this frame is part of flogi get the src mac addr from this
+ * frame if the src mac is fcoui based then we mark the
+ * address mode flag to use fcoui base for dst mac addr
+ * otherwise we have to store the fcoe gateway addr
+ */
+ eth_hdr = (struct ethhdr *)skb_mac_header(fp_skb(fp));
+ memcpy(mac, eth_hdr->h_source, ETH_ALEN);
+
+ if (ntoh24(mac) == FC_FCOE_OUI)
+ fnic->fcoui_mode = 1;
+ else {
+ fnic->fcoui_mode = 0;
+ memcpy(fnic->dest_addr, mac, ETH_ALEN);
+ }
+
+ /*
+ * Except for Flogi frame, all outbound frames from us have the
+ * Eth Src address as FC_FCOE_OUI"our_sid". Flogi frame uses
+ * the vnic MAC address as the Eth Src address
+ */
+ fc_fcoe_set_mac(fnic->data_src_addr, fh->fh_d_id);
+
+ /* We get our s_id from the d_id of the flogi resp frame */
+ fnic->s_id = ntoh24(fh->fh_d_id);
+
+ /* Change state to reflect transition from Eth to FC mode */
+ fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
+
+ } else {
+ FNIC_FCS_DBG(KERN_DEBUG, PFX "Unexpected fnic state %s while"
+ " processing flogi resp\n",
+ fnic_state_to_str(fnic->state));
+ ret = -1;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ dev_kfree_skb_irq(fp_skb(fp));
+ goto handle_flogi_resp_end;
+ }
+
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ /* Drop older cached frame */
+ if (old_flogi_resp)
+ dev_kfree_skb_irq(fp_skb(old_flogi_resp));
+
+ /*
+ * send flogi reg request to firmware, this will put the fnic in
+ * in FC mode
+ */
+ ret = fnic_flogi_reg_handler(fnic);
+
+ if (ret < 0) {
+ int free_fp = 1;
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ /*
+ * free the frame is some other thread is not
+ * pointing to it
+ */
+ if (fnic->flogi_resp != fp)
+ free_fp = 0;
+ else
+ fnic->flogi_resp = NULL;
+
+ if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
+ fnic->state = FNIC_IN_ETH_MODE;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ if (free_fp)
+ dev_kfree_skb_irq(fp_skb(fp));
+ }
+
+ handle_flogi_resp_end:
+ return ret;
+}
+
+/* Returns 1 for a response that matches cached flogi oxid */
+static inline int is_matching_flogi_resp_frame(struct fnic *fnic,
+ struct fc_frame *fp)
+{
+ struct fc_frame_header *fh;
+ int ret = 0;
+ u32 f_ctl;
+
+ fh = fc_frame_header_get(fp);
+ f_ctl = ntoh24(fh->fh_f_ctl);
+
+ if (fnic->flogi_oxid == ntohs(fh->fh_ox_id) &&
+ fh->fh_r_ctl == FC_RCTL_ELS_REP &&
+ (f_ctl & (FC_FC_EX_CTX | FC_FC_SEQ_CTX)) == FC_FC_EX_CTX &&
+ fh->fh_type == FC_TYPE_ELS &&
+ fc_frame_payload_op(fp) == ELS_LS_ACC)
+ ret = 1;
+
+ return ret;
+}
+
+static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc
+ *cq_desc, struct vnic_rq_buf *buf,
+ int skipped __attribute__((unused)),
+ void *opaque)
+{
+ struct fnic *fnic = vnic_dev_priv(rq->vdev);
+ struct sk_buff *skb;
+ struct fc_frame *fp;
+ unsigned int eth_hdrs_stripped;
+ struct fnic_event *event = NULL;
+ u8 type, color, eop, sop, ingress_port, vlan_stripped;
+ u8 fcoe = 0, fcoe_sof, fcoe_eof;
+ u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0;
+ u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
+ u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc;
+ u8 fcs_ok = 1, packet_error = 0;
+ u16 q_number, completed_index, bytes_written = 0, vlan, checksum;
+ u32 rss_hash;
+ u16 exchange_id, tmpl;
+ u8 sof = 0;
+ u8 eof = 0;
+ u32 fcp_bytes_written = 0;
+ unsigned long flags;
+
+ pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
+ PCI_DMA_FROMDEVICE);
+ skb = buf->os_buf;
+ buf->os_buf = NULL;
+
+ cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index);
+ if (type == CQ_DESC_TYPE_RQ_FCP) {
+ cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc,
+ &type, &color, &q_number, &completed_index,
+ &eop, &sop, &fcoe_fc_crc_ok, &exchange_id,
+ &tmpl, &fcp_bytes_written, &sof, &eof,
+ &ingress_port, &packet_error,
+ &fcoe_enc_error, &fcs_ok, &vlan_stripped,
+ &vlan);
+ eth_hdrs_stripped = 1;
+
+ } else if (type == CQ_DESC_TYPE_RQ_ENET) {
+ cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
+ &type, &color, &q_number, &completed_index,
+ &ingress_port, &fcoe, &eop, &sop,
+ &rss_type, &csum_not_calc, &rss_hash,
+ &bytes_written, &packet_error,
+ &vlan_stripped, &vlan, &checksum,
+ &fcoe_sof, &fcoe_fc_crc_ok,
+ &fcoe_enc_error, &fcoe_eof,
+ &tcp_udp_csum_ok, &udp, &tcp,
+ &ipv4_csum_ok, &ipv6, &ipv4,
+ &ipv4_fragment, &fcs_ok);
+ eth_hdrs_stripped = 0;
+
+ } else {
+ /* wrong CQ type*/
+ printk(KERN_ERR DFX "fnic rq_cmpl wrong cq type x%x\n",
+ fnic->fnic_no, type);
+ goto drop;
+ }
+
+ if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) {
+ FNIC_FCS_DBG(KERN_DEBUG, DFX "fnic rq_cmpl fcoe x%x fcsok x%x"
+ " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err"
+ " x%x\n",
+ fnic->fnic_no, fcoe, fcs_ok, packet_error,
+ fcoe_fc_crc_ok, fcoe_enc_error);
+ goto drop;
+ }
+
+ if (eth_hdrs_stripped)
+ fnic_import_rq_fc_frame(skb, fcp_bytes_written, sof, eof);
+ else if (fnic_import_rq_eth_pkt(skb, bytes_written))
+ goto drop;
+
+ fp = (struct fc_frame *)skb;
+
+ /*
+ * If frame is an ELS response that matches the cached FLOGI OX_ID,
+ * issue flogi_reg_request copy wq request to firmware
+ * to register the S_ID and determine whether FC_OUI mode or GW mode.
+ */
+ if (is_matching_flogi_resp_frame(fnic, fp)) {
+ if (!eth_hdrs_stripped) {
+ fnic_handle_flogi_resp(fnic, fp);
+ return;
+ }
+ goto drop;
+ }
+ if (!eth_hdrs_stripped)
+ goto drop;
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ if (fnic->stop_rx_link_events) {
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ return;
+ }
+
+
+ /* Queue the frame to fnic workQ */
+ event = kmem_cache_alloc(fnic_ev_cache, GFP_ATOMIC);
+ if (event == NULL) {
+ FNIC_FCS_DBG(KERN_DEBUG, DFX "Cannot allocate a event, "
+ "dropping the FCS Rx frame\n", fnic->fnic_no);
+ goto drop;
+ }
+
+ memset(event, 0, sizeof(struct fnic_event));
+
+ /* initialize the event structure*/
+ event->fp = fp;
+ fr_dev(fp) = fnic->lport;
+ event->fnic = fnic;
+ event->ev_type = EV_TYPE_FRAME;
+ event->is_flogi_resp_frame = 0;
+ fnic->event_count++;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ INIT_WORK(&event->event_work, fnic_event_work);
+ queue_work(fnic_event_queue, &event->event_work);
+
+ return;
+drop:
+ dev_kfree_skb_irq(skb);
+}
+
+static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev,
+ struct cq_desc *cq_desc, u8 type,
+ u16 q_number, u16 completed_index,
+ void *opaque)
+{
+ struct fnic *fnic = vnic_dev_priv(vdev);
+
+ vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index,
+ VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv,
+ NULL);
+ return 0;
+}
+
+int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do)
+{
+ unsigned int tot_rq_work_done = 0, cur_work_done;
+ unsigned int i;
+ int err;
+
+ for (i = 0; i < fnic->rq_count; i++) {
+ cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do,
+ fnic_rq_cmpl_handler_cont,
+ NULL);
+ if (cur_work_done) {
+ err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
+ if (err)
+ printk(KERN_ERR DFX "fnic_alloc_rq_frame"
+ " cant alloc frame\n", fnic->fnic_no);
+ }
+ tot_rq_work_done += cur_work_done;
+ }
+
+ return tot_rq_work_done;
+}
+
+/*
+ * This function is called once at init time to allocate and fill RQ
+ * buffers. Subsequently, it is called in the interrupt context after RQ
+ * buffer processing to replenish the buffers in the RQ
+ */
+int fnic_alloc_rq_frame(struct vnic_rq *rq)
+{
+ struct fnic *fnic = vnic_dev_priv(rq->vdev);
+ struct sk_buff *skb;
+ u16 len;
+ dma_addr_t pa;
+
+ len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM;
+ skb = dev_alloc_skb(len);
+ if (!skb) {
+ FNIC_FCS_DBG(KERN_DEBUG, DFX "Unable to allocate RQ sk_buff\n",
+ fnic->fnic_no);
+ return -ENOMEM;
+ }
+ skb_reset_mac_header(skb);
+ skb_reset_transport_header(skb);
+ skb_reset_network_header(skb);
+ skb_put(skb, len);
+ pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE);
+ fnic_queue_rq_desc(rq, skb, pa, len);
+ return 0;
+}
+
+void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
+{
+ struct fc_frame *fp = buf->os_buf;
+ struct fnic *fnic = vnic_dev_priv(rq->vdev);
+
+ pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
+ PCI_DMA_FROMDEVICE);
+
+ dev_kfree_skb(fp_skb(fp));
+ buf->os_buf = NULL;
+}
+
+static inline int is_flogi_frame(struct fc_frame_header *fh)
+{
+ return fh->fh_r_ctl == FC_RCTL_ELS_REQ && *(u8 *)(fh + 1) == ELS_FLOGI;
+}
+
+int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
+{
+ struct vnic_wq *wq = &fnic->wq[0];
+ struct sk_buff *skb;
+ dma_addr_t pa;
+ struct ethhdr *eth_hdr;
+ struct vlan_ethhdr *vlan_hdr;
+ struct fcoe_hdr *fcoe_hdr;
+ struct fc_frame_header *fh;
+ u32 tot_len, eth_hdr_len;
+ int ret = 0;
+ unsigned long flags;
+
+ fh = fc_frame_header_get(fp);
+ skb = fp_skb(fp);
+
+ if (!fnic->vlan_hw_insert) {
+ eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
+ vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, eth_hdr_len);
+ eth_hdr = (struct ethhdr *)vlan_hdr;
+ vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
+ vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE);
+ vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
+ fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
+ } else {
+ eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
+ eth_hdr = (struct ethhdr *)skb_push(skb, eth_hdr_len);
+ eth_hdr->h_proto = htons(ETH_P_FCOE);
+ fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
+ }
+
+ if (is_flogi_frame(fh)) {
+ fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
+ memcpy(eth_hdr->h_source, fnic->mac_addr, ETH_ALEN);
+ } else {
+ if (fnic->fcoui_mode)
+ fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
+ else
+ memcpy(eth_hdr->h_dest, fnic->dest_addr, ETH_ALEN);
+ memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
+ }
+
+ tot_len = skb->len;
+ BUG_ON(tot_len % 4);
+
+ memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
+ fcoe_hdr->fcoe_sof = fr_sof(fp);
+ if (FC_FCOE_VER)
+ FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
+
+ pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE);
+
+ spin_lock_irqsave(&fnic->wq_lock[0], flags);
+
+ if (!vnic_wq_desc_avail(wq)) {
+ pci_unmap_single(fnic->pdev, pa,
+ tot_len, PCI_DMA_TODEVICE);
+ ret = -1;
+ goto fnic_send_frame_end;
+ }
+
+ fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
+ fnic->vlan_hw_insert, fnic->vlan_id, 1, 1, 1);
+fnic_send_frame_end:
+ spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
+
+ if (ret)
+ dev_kfree_skb_any(fp_skb(fp));
+
+ return ret;
+}
+
+/*
+ * fnic_send
+ * Routine to send a raw frame
+ */
+int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
+{
+ struct fnic *fnic = lport_priv(lp);
+ struct fc_frame_header *fh;
+ int ret = 0;
+ enum fnic_state old_state;
+ unsigned long flags;
+ struct fc_frame *old_flogi = NULL;
+ struct fc_frame *old_flogi_resp = NULL;
+
+ if (fnic->in_remove) {
+ dev_kfree_skb(fp_skb(fp));
+ ret = -1;
+ goto fnic_send_end;
+ }
+
+ fh = fc_frame_header_get(fp);
+ /* if not an Flogi frame, send it out, this is the common case */
+ if (!is_flogi_frame(fh))
+ return fnic_send_frame(fnic, fp);
+
+ /* Flogi frame, now enter the state machine */
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+again:
+ /* Get any old cached frames, free them after dropping lock */
+ old_flogi = fnic->flogi;
+ fnic->flogi = NULL;
+ old_flogi_resp = fnic->flogi_resp;
+ fnic->flogi_resp = NULL;
+
+ fnic->flogi_oxid = FC_XID_UNKNOWN;
+
+ old_state = fnic->state;
+ switch (old_state) {
+ case FNIC_IN_FC_MODE:
+ case FNIC_IN_ETH_TRANS_FC_MODE:
+ default:
+ fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
+ vnic_dev_del_addr(fnic->vdev, fnic->data_src_addr);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ if (old_flogi) {
+ dev_kfree_skb(fp_skb(old_flogi));
+ old_flogi = NULL;
+ }
+ if (old_flogi_resp) {
+ dev_kfree_skb(fp_skb(old_flogi_resp));
+ old_flogi_resp = NULL;
+ }
+
+ ret = fnic_fw_reset_handler(fnic);
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE)
+ goto again;
+ if (ret) {
+ fnic->state = old_state;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ dev_kfree_skb(fp_skb(fp));
+ goto fnic_send_end;
+ }
+ old_flogi = fnic->flogi;
+ fnic->flogi = fp;
+ fnic->flogi_oxid = ntohs(fh->fh_ox_id);
+ old_flogi_resp = fnic->flogi_resp;
+ fnic->flogi_resp = NULL;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ break;
+
+ case FNIC_IN_FC_TRANS_ETH_MODE:
+ /*
+ * A reset is pending with the firmware. Store the flogi
+ * and its oxid. The transition out of this state happens
+ * only when Firmware completes the reset, either with
+ * success or failed. If success, transition to
+ * FNIC_IN_ETH_MODE, if fail, then transition to
+ * FNIC_IN_FC_MODE
+ */
+ fnic->flogi = fp;
+ fnic->flogi_oxid = ntohs(fh->fh_ox_id);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ break;
+
+ case FNIC_IN_ETH_MODE:
+ /*
+ * The fw/hw is already in eth mode. Store the oxid,
+ * and send the flogi frame out. The transition out of this
+ * state happens only we receive flogi response from the
+ * network, and the oxid matches the cached oxid when the
+ * flogi frame was sent out. If they match, then we issue
+ * a flogi_reg request and transition to state
+ * FNIC_IN_ETH_TRANS_FC_MODE
+ */
+ fnic->flogi_oxid = ntohs(fh->fh_ox_id);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ ret = fnic_send_frame(fnic, fp);
+ break;
+ }
+
+fnic_send_end:
+ if (old_flogi)
+ dev_kfree_skb(fp_skb(old_flogi));
+ if (old_flogi_resp)
+ dev_kfree_skb(fp_skb(old_flogi_resp));
+ return ret;
+}
+
+static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
+ struct cq_desc *cq_desc,
+ struct vnic_wq_buf *buf, void *opaque)
+{
+ struct sk_buff *skb = buf->os_buf;
+ struct fc_frame *fp = (struct fc_frame *)skb;
+ struct fnic *fnic = vnic_dev_priv(wq->vdev);
+
+ pci_unmap_single(fnic->pdev, buf->dma_addr,
+ buf->len, PCI_DMA_TODEVICE);
+ dev_kfree_skb_irq(fp_skb(fp));
+ buf->os_buf = NULL;
+}
+
+static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev,
+ struct cq_desc *cq_desc, u8 type,
+ u16 q_number, u16 completed_index,
+ void *opaque)
+{
+ struct fnic *fnic = vnic_dev_priv(vdev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&fnic->wq_lock[q_number], flags);
+ vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index,
+ fnic_wq_complete_frame_send, NULL);
+ spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags);
+
+ return 0;
+}
+
+int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do)
+{
+ unsigned int wq_work_done = 0;
+ unsigned int i;
+
+ for (i = 0; i < fnic->raw_wq_count; i++) {
+ wq_work_done += vnic_cq_service(&fnic->cq[fnic->rq_count+i],
+ work_to_do,
+ fnic_wq_cmpl_handler_cont,
+ NULL);
+ }
+
+ return wq_work_done;
+}
+
+
+void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
+{
+ struct fc_frame *fp = buf->os_buf;
+ struct fnic *fnic = vnic_dev_priv(wq->vdev);
+
+ pci_unmap_single(fnic->pdev, buf->dma_addr,
+ buf->len, PCI_DMA_TODEVICE);
+
+ dev_kfree_skb(fp_skb(fp));
+ buf->os_buf = NULL;
+}
^ permalink raw reply related [flat|nested] 13+ messages in thread* [RFC][PATCH 4/6] fnic: adds resource allocation, interupt interfaces
2009-02-28 2:31 [PATCH 0/6] FCoE HBA Driver (fnic) for 2.6.30 feature window Abhijeet Joglekar
` (2 preceding siblings ...)
2009-02-28 2:32 ` [RFC][PATCH 3/6] fnic: Add support for Fibre Channel Services through libFC Abhijeet Joglekar
@ 2009-02-28 2:32 ` Abhijeet Joglekar
2009-02-28 2:32 ` [RFC][PATCH 5/6] fnic: add descriptor right, buffers, device interface Abhijeet Joglekar
2009-02-28 2:32 ` [RFC][PATCH 6/6] fnic: Patch MAINTAINERS, scsi Makefile, scsi Kconfig Abhijeet Joglekar
5 siblings, 0 replies; 13+ messages in thread
From: Abhijeet Joglekar @ 2009-02-28 2:32 UTC (permalink / raw)
To: james.bottomley, linux-scsi; +Cc: abjoglek, jeykholt
fnic: adds resource allocation, interupt interfaces
fnic_res.[h,c]: gets device config, maps PCI resources, allocates
descriptor rings, buffers
fnic_isr.c: interrupt vectors
Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com>
---
drivers/scsi/fnic/fnic_isr.c | 334 +++++++++++++++++++++++++++++++++
drivers/scsi/fnic/fnic_res.c | 431 ++++++++++++++++++++++++++++++++++++++++++
drivers/scsi/fnic/fnic_res.h | 197 +++++++++++++++++++
3 files changed, 962 insertions(+), 0 deletions(-)
create mode 100644 drivers/scsi/fnic/fnic_isr.c
create mode 100644 drivers/scsi/fnic/fnic_res.c
create mode 100644 drivers/scsi/fnic/fnic_res.h
diff --git a/drivers/scsi/fnic/fnic_isr.c b/drivers/scsi/fnic/fnic_isr.c
new file mode 100644
index 0000000..b4f4771
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_isr.c
@@ -0,0 +1,334 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/skbuff.h>
+#include <linux/mempool.h>
+#include <linux/interrupt.h>
+#include <scsi/libfc.h>
+#include <scsi/fc_frame.h>
+#include "vnic_dev.h"
+#include "vnic_intr.h"
+#include "vnic_stats.h"
+#include "fnic_io.h"
+#include "fnic.h"
+
+static irqreturn_t fnic_isr_legacy(int irq, void *data)
+{
+ struct fnic *fnic = (struct fnic *)data;
+ u32 pba;
+ unsigned long work_done = 0;
+
+ pba = vnic_intr_legacy_pba(fnic->legacy_pba);
+ if (!pba)
+ return IRQ_NONE;
+
+ if (pba & (1 << FNIC_INTX_NOTIFY)) {
+ vnic_intr_return_all_credits(&fnic->intr[FNIC_INTX_NOTIFY]);
+ fnic_handle_link_event(fnic);
+ }
+
+ if (pba & (1 << FNIC_INTX_ERR)) {
+ vnic_intr_return_all_credits(&fnic->intr[FNIC_INTX_ERR]);
+ fnic_log_q_error(fnic);
+ }
+
+ if (pba & (1 << FNIC_INTX_WQ_RQ_COPYWQ)) {
+ work_done += fnic_wq_copy_cmpl_handler(fnic, 8);
+ work_done += fnic_wq_cmpl_handler(fnic, 4);
+ work_done += fnic_rq_cmpl_handler(fnic, 4);
+
+ vnic_intr_return_credits(&fnic->intr[FNIC_INTX_WQ_RQ_COPYWQ],
+ work_done,
+ 1 /* unmask intr */,
+ 1 /* reset intr timer */);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t fnic_isr_msi(int irq, void *data)
+{
+ struct fnic *fnic = (struct fnic *)data;
+ unsigned long work_done = 0;
+
+ work_done += fnic_wq_copy_cmpl_handler(fnic, 8);
+ work_done += fnic_wq_cmpl_handler(fnic, 4);
+ work_done += fnic_rq_cmpl_handler(fnic, 4);
+
+ vnic_intr_return_credits(&fnic->intr[0],
+ work_done,
+ 1 /* unmask intr */,
+ 1 /* reset intr timer */);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t fnic_isr_msix_rq(int irq, void *data)
+{
+ struct fnic *fnic = (struct fnic *)data;
+ unsigned long rq_work_done = 0;
+
+ rq_work_done = fnic_rq_cmpl_handler(fnic, 4);
+ vnic_intr_return_credits(&fnic->intr[FNIC_MSIX_RQ],
+ rq_work_done,
+ 1 /* unmask intr */,
+ 1 /* reset intr timer */);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t fnic_isr_msix_wq(int irq, void *data)
+{
+ struct fnic *fnic = (struct fnic *)data;
+ unsigned long wq_work_done = 0;
+
+ wq_work_done = fnic_wq_cmpl_handler(fnic, 4);
+ vnic_intr_return_credits(&fnic->intr[FNIC_MSIX_WQ],
+ wq_work_done,
+ 1 /* unmask intr */,
+ 1 /* reset intr timer */);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t fnic_isr_msix_wq_copy(int irq, void *data)
+{
+ struct fnic *fnic = (struct fnic *)data;
+ unsigned long wq_copy_work_done = 0;
+
+ wq_copy_work_done = fnic_wq_copy_cmpl_handler(fnic, 8);
+ vnic_intr_return_credits(&fnic->intr[FNIC_MSIX_WQ_COPY],
+ wq_copy_work_done,
+ 1 /* unmask intr */,
+ 1 /* reset intr timer */);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t fnic_isr_msix_err_notify(int irq, void *data)
+{
+ struct fnic *fnic = (struct fnic *)data;
+
+ vnic_intr_return_all_credits(&fnic->intr[FNIC_MSIX_ERR_NOTIFY]);
+ fnic_log_q_error(fnic);
+ fnic_handle_link_event(fnic);
+
+ return IRQ_HANDLED;
+}
+
+void fnic_free_intr(struct fnic *fnic)
+{
+ int i;
+
+ switch (vnic_dev_get_intr_mode(fnic->vdev)) {
+ case VNIC_DEV_INTR_MODE_INTX:
+ case VNIC_DEV_INTR_MODE_MSI:
+ free_irq(fnic->pdev->irq, fnic);
+ break;
+
+ case VNIC_DEV_INTR_MODE_MSIX:
+ for (i = 0; i < ARRAY_SIZE(fnic->msix); i++)
+ if (fnic->msix[i].requested)
+ free_irq(fnic->msix_entry[i].vector,
+ fnic->msix[i].devid);
+ break;
+
+ default:
+ break;
+ }
+}
+
+int fnic_request_intr(struct fnic *fnic)
+{
+ int err = 0;
+ int i;
+
+ switch (vnic_dev_get_intr_mode(fnic->vdev)) {
+
+ case VNIC_DEV_INTR_MODE_INTX:
+ err = request_irq(fnic->pdev->irq, &fnic_isr_legacy,
+ IRQF_SHARED, DRV_NAME, fnic);
+ break;
+
+ case VNIC_DEV_INTR_MODE_MSI:
+ err = request_irq(fnic->pdev->irq, &fnic_isr_msi,
+ 0, fnic->name, fnic);
+ break;
+
+ case VNIC_DEV_INTR_MODE_MSIX:
+
+ sprintf(fnic->msix[FNIC_MSIX_RQ].devname,
+ "%.11s-fcs-rq", fnic->name);
+ fnic->msix[FNIC_MSIX_RQ].isr = fnic_isr_msix_rq;
+ fnic->msix[FNIC_MSIX_RQ].devid = fnic;
+
+ sprintf(fnic->msix[FNIC_MSIX_WQ].devname,
+ "%.11s-fcs-wq", fnic->name);
+ fnic->msix[FNIC_MSIX_WQ].isr = fnic_isr_msix_wq;
+ fnic->msix[FNIC_MSIX_WQ].devid = fnic;
+
+ sprintf(fnic->msix[FNIC_MSIX_WQ_COPY].devname,
+ "%.11s-scsi-wq", fnic->name);
+ fnic->msix[FNIC_MSIX_WQ_COPY].isr = fnic_isr_msix_wq_copy;
+ fnic->msix[FNIC_MSIX_WQ_COPY].devid = fnic;
+
+ sprintf(fnic->msix[FNIC_MSIX_ERR_NOTIFY].devname,
+ "%.11s-err-notify", fnic->name);
+ fnic->msix[FNIC_MSIX_ERR_NOTIFY].isr =
+ fnic_isr_msix_err_notify;
+ fnic->msix[FNIC_MSIX_ERR_NOTIFY].devid = fnic;
+
+ for (i = 0; i < ARRAY_SIZE(fnic->msix); i++) {
+ err = request_irq(fnic->msix_entry[i].vector,
+ fnic->msix[i].isr, 0,
+ fnic->msix[i].devname,
+ fnic->msix[i].devid);
+ if (err) {
+ printk(KERN_ERR PFX "MSIX: request_irq"
+ " failed %d\n", err);
+ fnic_free_intr(fnic);
+ break;
+ }
+ fnic->msix[i].requested = 1;
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ return err;
+}
+
+int fnic_set_intr_mode(struct fnic *fnic)
+{
+ unsigned int n = ARRAY_SIZE(fnic->rq);
+ unsigned int m = ARRAY_SIZE(fnic->wq);
+ unsigned int o = ARRAY_SIZE(fnic->wq_copy);
+ unsigned int i;
+
+ /*
+ * Set interrupt mode (INTx, MSI, MSI-X) depending
+ * system capabilities.
+ *
+ * Try MSI-X first
+ *
+ * We need n RQs, m WQs, o Copy WQs, n+m+o CQs, and n+m+o+1 INTRs
+ * (last INTR is used for WQ/RQ errors and notification area)
+ */
+
+ BUG_ON(ARRAY_SIZE(fnic->msix_entry) < n + m + o + 1);
+ for (i = 0; i < n + m + o + 1; i++)
+ fnic->msix_entry[i].entry = i;
+
+ if (fnic->rq_count >= n &&
+ fnic->raw_wq_count >= m &&
+ fnic->wq_copy_count >= o &&
+ fnic->cq_count >= n + m + o) {
+ if (!pci_enable_msix(fnic->pdev, fnic->msix_entry,
+ n + m + o + 1)) {
+ fnic->rq_count = n;
+ fnic->raw_wq_count = m;
+ fnic->wq_copy_count = o;
+ fnic->wq_count = m + o;
+ fnic->cq_count = n + m + o;
+ fnic->intr_count = n + m + o + 1;
+ fnic->err_intr_offset = FNIC_MSIX_ERR_NOTIFY;
+
+ FNIC_ISR_DBG(KERN_DEBUG,
+ PFX "Using MSI-X Interrupts\n");
+ vnic_dev_set_intr_mode(fnic->vdev,
+ VNIC_DEV_INTR_MODE_MSIX);
+ return 0;
+ }
+ }
+
+ /*
+ * Next try MSI
+ * We need 1 RQ, 1 WQ, 1 WQ_COPY, 3 CQs, and 1 INTR
+ */
+ if (fnic->rq_count >= 1 &&
+ fnic->raw_wq_count >= 1 &&
+ fnic->wq_copy_count >= 1 &&
+ fnic->cq_count >= 3 &&
+ fnic->intr_count >= 1 &&
+ !pci_enable_msi(fnic->pdev)) {
+
+ fnic->rq_count = 1;
+ fnic->raw_wq_count = 1;
+ fnic->wq_copy_count = 1;
+ fnic->wq_count = 2;
+ fnic->cq_count = 3;
+ fnic->intr_count = 1;
+ fnic->err_intr_offset = 0;
+
+ FNIC_ISR_DBG(KERN_DEBUG, PFX "Using MSI Interrupts\n");
+ vnic_dev_set_intr_mode(fnic->vdev, VNIC_DEV_INTR_MODE_MSI);
+
+ return 0;
+ }
+
+ /*
+ * Next try INTx
+ * We need 1 RQ, 1 WQ, 1 WQ_COPY, 3 CQs, and 3 INTRs
+ * 1 INTR is used for all 3 queues, 1 INTR for queue errors
+ * 1 INTR for notification area
+ */
+
+ if (fnic->rq_count >= 1 &&
+ fnic->raw_wq_count >= 1 &&
+ fnic->wq_copy_count >= 1 &&
+ fnic->cq_count >= 3 &&
+ fnic->intr_count >= 3) {
+
+ fnic->rq_count = 1;
+ fnic->raw_wq_count = 1;
+ fnic->wq_copy_count = 1;
+ fnic->cq_count = 3;
+ fnic->intr_count = 3;
+
+ FNIC_ISR_DBG(KERN_DEBUG, PFX "Using Legacy Interrupts\n");
+ vnic_dev_set_intr_mode(fnic->vdev, VNIC_DEV_INTR_MODE_INTX);
+
+ return 0;
+ }
+
+ vnic_dev_set_intr_mode(fnic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
+
+ return -EINVAL;
+}
+
+void fnic_clear_intr_mode(struct fnic *fnic)
+{
+ switch (vnic_dev_get_intr_mode(fnic->vdev)) {
+ case VNIC_DEV_INTR_MODE_MSIX:
+ pci_disable_msix(fnic->pdev);
+ break;
+ case VNIC_DEV_INTR_MODE_MSI:
+ pci_disable_msi(fnic->pdev);
+ break;
+ default:
+ break;
+ }
+
+ vnic_dev_set_intr_mode(fnic->vdev, VNIC_DEV_INTR_MODE_INTX);
+}
+
diff --git a/drivers/scsi/fnic/fnic_res.c b/drivers/scsi/fnic/fnic_res.c
new file mode 100644
index 0000000..95785f9
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_res.c
@@ -0,0 +1,431 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include "wq_enet_desc.h"
+#include "rq_enet_desc.h"
+#include "cq_enet_desc.h"
+#include "vnic_resource.h"
+#include "vnic_dev.h"
+#include "vnic_wq.h"
+#include "vnic_rq.h"
+#include "vnic_cq.h"
+#include "vnic_intr.h"
+#include "vnic_stats.h"
+#include "vnic_nic.h"
+#include "fnic.h"
+
+int fnic_get_vnic_config(struct fnic *fnic)
+{
+ struct vnic_fc_config *c = &fnic->config;
+ int err;
+
+#define GET_CONFIG(m) \
+ do { \
+ err = vnic_dev_spec(fnic->vdev, \
+ offsetof(struct vnic_fc_config, m), \
+ sizeof(c->m), &c->m); \
+ if (err) { \
+ printk(KERN_ERR PFX "Error getting %s, %d\n", #m, \
+ err); \
+ return err; \
+ } \
+ } while (0);
+
+ GET_CONFIG(node_wwn);
+ GET_CONFIG(port_wwn);
+ GET_CONFIG(wq_enet_desc_count);
+ GET_CONFIG(wq_copy_desc_count);
+ GET_CONFIG(rq_desc_count);
+ GET_CONFIG(maxdatafieldsize);
+ GET_CONFIG(ed_tov);
+ GET_CONFIG(ra_tov);
+ GET_CONFIG(intr_timer);
+ GET_CONFIG(intr_timer_type);
+ GET_CONFIG(flags);
+ GET_CONFIG(flogi_retries);
+ GET_CONFIG(flogi_timeout);
+ GET_CONFIG(plogi_retries);
+ GET_CONFIG(plogi_timeout);
+ GET_CONFIG(io_throttle_count);
+ GET_CONFIG(link_down_timeout);
+ GET_CONFIG(port_down_timeout);
+ GET_CONFIG(port_down_io_retries);
+ GET_CONFIG(luns_per_tgt);
+
+ c->wq_enet_desc_count =
+ min_t(u32, VNIC_FNIC_WQ_DESCS_MAX,
+ max_t(u32, VNIC_FNIC_WQ_DESCS_MIN,
+ c->wq_enet_desc_count));
+ c->wq_enet_desc_count = ALIGN(c->wq_enet_desc_count, 16);
+
+ c->wq_copy_desc_count =
+ min_t(u32, VNIC_FNIC_WQ_COPY_DESCS_MAX,
+ max_t(u32, VNIC_FNIC_WQ_COPY_DESCS_MIN,
+ c->wq_copy_desc_count));
+ c->wq_copy_desc_count = ALIGN(c->wq_copy_desc_count, 16);
+
+ c->rq_desc_count =
+ min_t(u32, VNIC_FNIC_RQ_DESCS_MAX,
+ max_t(u32, VNIC_FNIC_RQ_DESCS_MIN,
+ c->rq_desc_count));
+ c->rq_desc_count = ALIGN(c->rq_desc_count, 16);
+
+ c->maxdatafieldsize =
+ min_t(u16, VNIC_FNIC_MAXDATAFIELDSIZE_MAX,
+ max_t(u16, VNIC_FNIC_MAXDATAFIELDSIZE_MIN,
+ c->maxdatafieldsize));
+ c->ed_tov =
+ min_t(u32, VNIC_FNIC_EDTOV_MAX,
+ max_t(u32, VNIC_FNIC_EDTOV_MIN,
+ c->ed_tov));
+
+ c->ra_tov =
+ min_t(u32, VNIC_FNIC_RATOV_MAX,
+ max_t(u32, VNIC_FNIC_RATOV_MIN,
+ c->ra_tov));
+
+ c->flogi_retries =
+ min_t(u32, VNIC_FNIC_FLOGI_RETRIES_MAX, c->flogi_retries);
+
+ c->flogi_timeout =
+ min_t(u32, VNIC_FNIC_FLOGI_TIMEOUT_MAX,
+ max_t(u32, VNIC_FNIC_FLOGI_TIMEOUT_MIN,
+ c->flogi_timeout));
+
+ c->plogi_retries =
+ min_t(u32, VNIC_FNIC_PLOGI_RETRIES_MAX, c->plogi_retries);
+
+ c->plogi_timeout =
+ min_t(u32, VNIC_FNIC_PLOGI_TIMEOUT_MAX,
+ max_t(u32, VNIC_FNIC_PLOGI_TIMEOUT_MIN,
+ c->plogi_timeout));
+
+ c->io_throttle_count =
+ min_t(u32, VNIC_FNIC_IO_THROTTLE_COUNT_MAX,
+ max_t(u32, VNIC_FNIC_IO_THROTTLE_COUNT_MIN,
+ c->io_throttle_count));
+
+ c->link_down_timeout =
+ min_t(u32, VNIC_FNIC_LINK_DOWN_TIMEOUT_MAX,
+ c->link_down_timeout);
+
+ c->port_down_timeout =
+ min_t(u32, VNIC_FNIC_PORT_DOWN_TIMEOUT_MAX,
+ c->port_down_timeout);
+
+ c->port_down_io_retries =
+ min_t(u32, VNIC_FNIC_PORT_DOWN_IO_RETRIES_MAX,
+ c->port_down_io_retries);
+
+ c->luns_per_tgt =
+ min_t(u32, VNIC_FNIC_LUNS_PER_TARGET_MAX,
+ max_t(u32, VNIC_FNIC_LUNS_PER_TARGET_MIN,
+ c->luns_per_tgt));
+
+ c->intr_timer = min_t(u16, VNIC_INTR_TIMER_MAX, c->intr_timer);
+ c->intr_timer_type = c->intr_timer_type;
+
+ printk(KERN_INFO PFX "vNIC MAC addr %02x:%02x:%02x:%02x:%02x:%02x "
+ "wq/wq_copy/rq %d/%d/%d\n",
+ fnic->mac_addr[0], fnic->mac_addr[1], fnic->mac_addr[2],
+ fnic->mac_addr[3], fnic->mac_addr[4], fnic->mac_addr[5],
+ c->wq_enet_desc_count, c->wq_copy_desc_count, c->rq_desc_count);
+ printk(KERN_INFO PFX "vNIC node wwn %llx port wwn %llx\n",
+ c->node_wwn, c->port_wwn);
+ printk(KERN_INFO PFX "vNIC ed_tov %d ra_tov %d\n",
+ c->ed_tov, c->ra_tov);
+ printk(KERN_INFO PFX "vNIC mtu %d intr timer %d\n",
+ c->maxdatafieldsize, c->intr_timer);
+ printk(KERN_INFO PFX "vNIC flags 0x%x luns per tgt %d\n",
+ c->flags, c->luns_per_tgt);
+ printk(KERN_INFO PFX "vNIC flogi_retries %d flogi timeout %d\n",
+ c->flogi_retries, c->flogi_timeout);
+ printk(KERN_INFO PFX "vNIC plogi retries %d plogi timeout %d\n",
+ c->plogi_retries, c->plogi_timeout);
+ printk(KERN_INFO PFX "vNIC io throttle count %d link dn timeout %d\n",
+ c->io_throttle_count, c->link_down_timeout);
+ printk(KERN_INFO PFX "vNIC port dn io retries %d port dn timeout %d\n",
+ c->port_down_io_retries, c->port_down_timeout);
+
+ return 0;
+}
+
+int fnic_set_nic_config(struct fnic *fnic, u8 rss_default_cpu,
+ u8 rss_hash_type,
+ u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable,
+ u8 tso_ipid_split_en, u8 ig_vlan_strip_en)
+{
+ u64 a0, a1;
+ u32 nic_cfg;
+ int wait = 1000;
+
+ vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
+ rss_hash_type, rss_hash_bits, rss_base_cpu,
+ rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
+
+ a0 = nic_cfg;
+ a1 = 0;
+
+ return vnic_dev_cmd(fnic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
+}
+
+void fnic_get_res_counts(struct fnic *fnic)
+{
+ fnic->wq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_WQ);
+ fnic->raw_wq_count = fnic->wq_count - 1;
+ fnic->wq_copy_count = fnic->wq_count - fnic->raw_wq_count;
+ fnic->rq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_RQ);
+ fnic->cq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_CQ);
+ fnic->intr_count = vnic_dev_get_res_count(fnic->vdev,
+ RES_TYPE_INTR_CTRL);
+}
+
+void fnic_free_vnic_resources(struct fnic *fnic)
+{
+ unsigned int i;
+
+ for (i = 0; i < fnic->raw_wq_count; i++)
+ vnic_wq_free(&fnic->wq[i]);
+
+ for (i = 0; i < fnic->wq_copy_count; i++)
+ vnic_wq_copy_free(&fnic->wq_copy[i]);
+
+ for (i = 0; i < fnic->rq_count; i++)
+ vnic_rq_free(&fnic->rq[i]);
+
+ for (i = 0; i < fnic->cq_count; i++)
+ vnic_cq_free(&fnic->cq[i]);
+
+ for (i = 0; i < fnic->intr_count; i++)
+ vnic_intr_free(&fnic->intr[i]);
+}
+
+int fnic_alloc_vnic_resources(struct fnic *fnic)
+{
+ enum vnic_dev_intr_mode intr_mode;
+ unsigned int mask_on_assertion;
+ unsigned int interrupt_offset;
+ unsigned int error_interrupt_enable;
+ unsigned int error_interrupt_offset;
+ unsigned int i, cq_index;
+ unsigned int wq_copy_cq_desc_count;
+ int err;
+
+ intr_mode = vnic_dev_get_intr_mode(fnic->vdev);
+
+ printk(KERN_INFO PFX "vNIC interrupt mode: %s\n",
+ intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
+ intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
+ intr_mode == VNIC_DEV_INTR_MODE_MSIX ? "MSI-X" : "unknown");
+
+ printk(KERN_INFO PFX "vNIC resources avail: "
+ "wq %d cp_wq %d raw_wq %d rq %d cq %d intr %d\n",
+ fnic->wq_count, fnic->wq_copy_count, fnic->raw_wq_count,
+ fnic->rq_count, fnic->cq_count, fnic->intr_count);
+
+ /* Allocate Raw WQ used for FCS frames */
+ for (i = 0; i < fnic->raw_wq_count; i++) {
+ err = vnic_wq_alloc(fnic->vdev, &fnic->wq[i], i,
+ fnic->config.wq_enet_desc_count,
+ sizeof(struct wq_enet_desc));
+ if (err)
+ goto err_out_cleanup;
+ }
+
+ /* Allocate Copy WQs used for SCSI IOs */
+ for (i = 0; i < fnic->wq_copy_count; i++) {
+ err = vnic_wq_copy_alloc(fnic->vdev, &fnic->wq_copy[i],
+ (fnic->raw_wq_count + i),
+ fnic->config.wq_copy_desc_count,
+ sizeof(struct fcpio_host_req));
+ if (err)
+ goto err_out_cleanup;
+ }
+
+ /* RQ for receiving FCS frames */
+ for (i = 0; i < fnic->rq_count; i++) {
+ err = vnic_rq_alloc(fnic->vdev, &fnic->rq[i], i,
+ fnic->config.rq_desc_count,
+ sizeof(struct rq_enet_desc));
+ if (err)
+ goto err_out_cleanup;
+ }
+
+ /* CQ for each RQ */
+ for (i = 0; i < fnic->rq_count; i++) {
+ cq_index = i;
+ err = vnic_cq_alloc(fnic->vdev,
+ &fnic->cq[cq_index], cq_index,
+ fnic->config.rq_desc_count,
+ sizeof(struct cq_enet_rq_desc));
+ if (err)
+ goto err_out_cleanup;
+ }
+
+ /* CQ for each WQ */
+ for (i = 0; i < fnic->raw_wq_count; i++) {
+ cq_index = fnic->rq_count + i;
+ err = vnic_cq_alloc(fnic->vdev, &fnic->cq[cq_index], cq_index,
+ fnic->config.wq_enet_desc_count,
+ sizeof(struct cq_enet_wq_desc));
+ if (err)
+ goto err_out_cleanup;
+ }
+
+ /* CQ for each COPY WQ */
+ wq_copy_cq_desc_count = (fnic->config.wq_copy_desc_count * 3);
+ for (i = 0; i < fnic->wq_copy_count; i++) {
+ cq_index = fnic->raw_wq_count + fnic->rq_count + i;
+ err = vnic_cq_alloc(fnic->vdev, &fnic->cq[cq_index],
+ cq_index,
+ wq_copy_cq_desc_count,
+ sizeof(struct fcpio_fw_req));
+ if (err)
+ goto err_out_cleanup;
+ }
+
+ for (i = 0; i < fnic->intr_count; i++) {
+ err = vnic_intr_alloc(fnic->vdev, &fnic->intr[i], i);
+ if (err)
+ goto err_out_cleanup;
+ }
+
+ fnic->legacy_pba = vnic_dev_get_res(fnic->vdev,
+ RES_TYPE_INTR_PBA_LEGACY, 0);
+
+ if (!fnic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
+ printk(KERN_ERR "Failed to hook legacy pba resource\n");
+ err = -ENODEV;
+ goto err_out_cleanup;
+ }
+
+ /*
+ * Init RQ/WQ resources.
+ *
+ * RQ[0 to n-1] point to CQ[0 to n-1]
+ * WQ[0 to m-1] point to CQ[n to n+m-1]
+ * WQ_COPY[0 to k-1] points to CQ[n+m to n+m+k-1]
+ *
+ * Note for copy wq we always initialize with cq_index = 0
+ *
+ * Error interrupt is not enabled for MSI.
+ */
+
+ switch (intr_mode) {
+ case VNIC_DEV_INTR_MODE_INTX:
+ case VNIC_DEV_INTR_MODE_MSIX:
+ error_interrupt_enable = 1;
+ error_interrupt_offset = fnic->err_intr_offset;
+ break;
+ default:
+ error_interrupt_enable = 0;
+ error_interrupt_offset = 0;
+ break;
+ }
+
+ for (i = 0; i < fnic->rq_count; i++) {
+ cq_index = i;
+ vnic_rq_init(&fnic->rq[i],
+ cq_index,
+ error_interrupt_enable,
+ error_interrupt_offset);
+ }
+
+ for (i = 0; i < fnic->raw_wq_count; i++) {
+ cq_index = i + fnic->rq_count;
+ vnic_wq_init(&fnic->wq[i],
+ cq_index,
+ error_interrupt_enable,
+ error_interrupt_offset);
+ }
+
+ for (i = 0; i < fnic->wq_copy_count; i++) {
+ vnic_wq_copy_init(&fnic->wq_copy[i],
+ 0 /* cq_index 0 - always */,
+ error_interrupt_enable,
+ error_interrupt_offset);
+ }
+
+ for (i = 0; i < fnic->cq_count; i++) {
+
+ switch (intr_mode) {
+ case VNIC_DEV_INTR_MODE_MSIX:
+ interrupt_offset = i;
+ break;
+ default:
+ interrupt_offset = 0;
+ break;
+ }
+
+ vnic_cq_init(&fnic->cq[i],
+ 0 /* flow_control_enable */,
+ 1 /* color_enable */,
+ 0 /* cq_head */,
+ 0 /* cq_tail */,
+ 1 /* cq_tail_color */,
+ 1 /* interrupt_enable */,
+ 1 /* cq_entry_enable */,
+ 0 /* cq_message_enable */,
+ interrupt_offset,
+ 0 /* cq_message_addr */);
+ }
+
+ /*
+ * Init INTR resources
+ *
+ * mask_on_assertion is not used for INTx due to the level-
+ * triggered nature of INTx
+ */
+
+ switch (intr_mode) {
+ case VNIC_DEV_INTR_MODE_MSI:
+ case VNIC_DEV_INTR_MODE_MSIX:
+ mask_on_assertion = 1;
+ break;
+ default:
+ mask_on_assertion = 0;
+ break;
+ }
+
+ for (i = 0; i < fnic->intr_count; i++) {
+ vnic_intr_init(&fnic->intr[i],
+ fnic->config.intr_timer,
+ fnic->config.intr_timer_type,
+ mask_on_assertion);
+ }
+
+ /* init the stats memory by making the first call here */
+ err = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
+ if (err) {
+ printk(KERN_ERR "vnic_dev_stats_dump failed - x%x\n", err);
+ goto err_out_cleanup;
+ }
+
+ /* Clear LIF stats */
+ vnic_dev_stats_clear(fnic->vdev);
+
+ return 0;
+
+err_out_cleanup:
+ fnic_free_vnic_resources(fnic);
+
+ return err;
+}
diff --git a/drivers/scsi/fnic/fnic_res.h b/drivers/scsi/fnic/fnic_res.h
new file mode 100644
index 0000000..b6f3102
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_res.h
@@ -0,0 +1,197 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _FNIC_RES_H_
+#define _FNIC_RES_H_
+
+#include "wq_enet_desc.h"
+#include "rq_enet_desc.h"
+#include "vnic_wq.h"
+#include "vnic_rq.h"
+#include "fnic_io.h"
+#include "fcpio.h"
+#include "vnic_wq_copy.h"
+#include "vnic_cq_copy.h"
+
+static inline void fnic_queue_wq_desc(struct vnic_wq *wq,
+ void *os_buf, dma_addr_t dma_addr,
+ unsigned int len, unsigned int fc_eof,
+ int vlan_tag_insert,
+ unsigned int vlan_tag,
+ int cq_entry, int sop, int eop)
+{
+ struct wq_enet_desc *desc = vnic_wq_next_desc(wq);
+
+ wq_enet_desc_enc(desc,
+ (u64)dma_addr | VNIC_PADDR_TARGET,
+ (u16)len,
+ 0, /* mss_or_csum_offset */
+ (u16)fc_eof,
+ 0, /* offload_mode */
+ (u8)eop, (u8)cq_entry,
+ 1, /* fcoe_encap */
+ (u8)vlan_tag_insert,
+ (u16)vlan_tag,
+ 0 /* loopback */);
+
+ vnic_wq_post(wq, os_buf, dma_addr, len, sop, eop);
+}
+
+static inline void fnic_queue_wq_copy_desc_icmnd_16(struct vnic_wq_copy *wq,
+ u32 req_id,
+ u32 lunmap_id, u8 spl_flags,
+ u32 sgl_cnt, u32 sense_len,
+ u64 sgl_addr, u64 sns_addr,
+ u8 crn, u8 pri_ta,
+ u8 flags, u8 *scsi_cdb,
+ u32 data_len, u8 *lun,
+ u32 d_id, u16 mss,
+ u32 ratov, u32 edtov)
+{
+ struct fcpio_host_req *desc = vnic_wq_copy_next_desc(wq);
+
+ desc->hdr.type = FCPIO_ICMND_16; /* enum fcpio_type */
+ desc->hdr.status = 0; /* header status entry */
+ desc->hdr._resvd = 0; /* reserved */
+ desc->hdr.tag.u.req_id = req_id; /* id for this request */
+
+ desc->u.icmnd_16.lunmap_id = lunmap_id; /* index into lunmap table */
+ desc->u.icmnd_16.special_req_flags = spl_flags; /* exch req flags */
+ desc->u.icmnd_16._resvd0[0] = 0; /* reserved */
+ desc->u.icmnd_16._resvd0[1] = 0; /* reserved */
+ desc->u.icmnd_16._resvd0[2] = 0; /* reserved */
+ desc->u.icmnd_16.sgl_cnt = sgl_cnt; /* scatter-gather list count */
+ desc->u.icmnd_16.sense_len = sense_len; /* sense buffer length */
+ desc->u.icmnd_16.sgl_addr = sgl_addr; /* scatter-gather list addr */
+ desc->u.icmnd_16.sense_addr = sns_addr; /* sense buffer address */
+ desc->u.icmnd_16.crn = crn; /* SCSI Command Reference No.*/
+ desc->u.icmnd_16.pri_ta = pri_ta; /* SCSI Pri & Task attribute */
+ desc->u.icmnd_16._resvd1 = 0; /* reserved: should be 0 */
+ desc->u.icmnd_16.flags = flags; /* command flags */
+ memcpy(desc->u.icmnd_16.scsi_cdb, scsi_cdb, CDB_16); /* SCSI CDB */
+ desc->u.icmnd_16.data_len = data_len; /* length of data expected */
+ memcpy(desc->u.icmnd_16.lun, lun, LUN_ADDRESS); /* LUN address */
+ desc->u.icmnd_16._resvd2 = 0; /* reserved */
+ hton24(desc->u.icmnd_16.d_id, d_id); /* FC vNIC only: Target D_ID */
+ desc->u.icmnd_16.mss = mss; /* FC vNIC only: max burst */
+ desc->u.icmnd_16.r_a_tov = ratov; /*FC vNIC only: Res. Alloc Timeout */
+ desc->u.icmnd_16.e_d_tov = edtov; /*FC vNIC only: Err Detect Timeout */
+
+ vnic_wq_copy_post(wq);
+}
+
+static inline void fnic_queue_wq_copy_desc_itmf(struct vnic_wq_copy *wq,
+ u32 req_id, u32 lunmap_id,
+ u32 tm_req, u32 tm_id, u8 *lun,
+ u32 d_id, u32 r_a_tov,
+ u32 e_d_tov)
+{
+ struct fcpio_host_req *desc = vnic_wq_copy_next_desc(wq);
+
+ desc->hdr.type = FCPIO_ITMF; /* enum fcpio_type */
+ desc->hdr.status = 0; /* header status entry */
+ desc->hdr._resvd = 0; /* reserved */
+ desc->hdr.tag.u.req_id = req_id; /* id for this request */
+
+ desc->u.itmf.lunmap_id = lunmap_id; /* index into lunmap table */
+ desc->u.itmf.tm_req = tm_req; /* SCSI Task Management request */
+ desc->u.itmf.t_tag = tm_id; /* tag of fcpio to be aborted */
+ desc->u.itmf._resvd = 0;
+ memcpy(desc->u.itmf.lun, lun, LUN_ADDRESS); /* LUN address */
+ desc->u.itmf._resvd1 = 0;
+ hton24(desc->u.itmf.d_id, d_id); /* FC vNIC only: Target D_ID */
+ desc->u.itmf.r_a_tov = r_a_tov; /* FC vNIC only: R_A_TOV in msec */
+ desc->u.itmf.e_d_tov = e_d_tov; /* FC vNIC only: E_D_TOV in msec */
+
+ vnic_wq_copy_post(wq);
+}
+
+static inline void fnic_queue_wq_copy_desc_flogi_reg(struct vnic_wq_copy *wq,
+ u32 req_id, u8 format,
+ u32 s_id, u8 *gw_mac)
+{
+ struct fcpio_host_req *desc = vnic_wq_copy_next_desc(wq);
+
+ desc->hdr.type = FCPIO_FLOGI_REG; /* enum fcpio_type */
+ desc->hdr.status = 0; /* header status entry */
+ desc->hdr._resvd = 0; /* reserved */
+ desc->hdr.tag.u.req_id = req_id; /* id for this request */
+
+ desc->u.flogi_reg.format = format;
+ hton24(desc->u.flogi_reg.s_id, s_id);
+ memcpy(desc->u.flogi_reg.gateway_mac, gw_mac, ETH_ALEN);
+
+ vnic_wq_copy_post(wq);
+}
+
+static inline void fnic_queue_wq_copy_desc_fw_reset(struct vnic_wq_copy *wq,
+ u32 req_id)
+{
+ struct fcpio_host_req *desc = vnic_wq_copy_next_desc(wq);
+
+ desc->hdr.type = FCPIO_RESET; /* enum fcpio_type */
+ desc->hdr.status = 0; /* header status entry */
+ desc->hdr._resvd = 0; /* reserved */
+ desc->hdr.tag.u.req_id = req_id; /* id for this request */
+
+ vnic_wq_copy_post(wq);
+}
+
+static inline void fnic_queue_wq_copy_desc_lunmap(struct vnic_wq_copy *wq,
+ u32 req_id, u64 lunmap_addr,
+ u32 lunmap_len)
+{
+ struct fcpio_host_req *desc = vnic_wq_copy_next_desc(wq);
+
+ desc->hdr.type = FCPIO_LUNMAP_REQ; /* enum fcpio_type */
+ desc->hdr.status = 0; /* header status entry */
+ desc->hdr._resvd = 0; /* reserved */
+ desc->hdr.tag.u.req_id = req_id; /* id for this request */
+
+ desc->u.lunmap_req.addr = lunmap_addr; /* address of the buffer */
+ desc->u.lunmap_req.len = lunmap_len; /* len of the buffer */
+
+ vnic_wq_copy_post(wq);
+}
+
+static inline void fnic_queue_rq_desc(struct vnic_rq *rq,
+ void *os_buf, dma_addr_t dma_addr,
+ u16 len)
+{
+ struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
+
+ rq_enet_desc_enc(desc,
+ (u64)dma_addr | VNIC_PADDR_TARGET,
+ RQ_ENET_TYPE_ONLY_SOP,
+ (u16)len);
+
+ vnic_rq_post(rq, os_buf, 0, dma_addr, len);
+}
+
+
+struct fnic;
+
+int fnic_get_vnic_config(struct fnic *);
+int fnic_alloc_vnic_resources(struct fnic *);
+void fnic_free_vnic_resources(struct fnic *);
+void fnic_get_res_counts(struct fnic *);
+int fnic_set_nic_config(struct fnic *fnic, u8 rss_default_cpu,
+ u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu,
+ u8 rss_enable, u8 tso_ipid_split_en,
+ u8 ig_vlan_strip_en);
+
+#endif /* _FNIC_RES_H_ */
^ permalink raw reply related [flat|nested] 13+ messages in thread* [RFC][PATCH 5/6] fnic: add descriptor right, buffers, device interface
2009-02-28 2:31 [PATCH 0/6] FCoE HBA Driver (fnic) for 2.6.30 feature window Abhijeet Joglekar
` (3 preceding siblings ...)
2009-02-28 2:32 ` [RFC][PATCH 4/6] fnic: adds resource allocation, interupt interfaces Abhijeet Joglekar
@ 2009-02-28 2:32 ` Abhijeet Joglekar
2009-03-12 20:43 ` Mike Christie
2009-02-28 2:32 ` [RFC][PATCH 6/6] fnic: Patch MAINTAINERS, scsi Makefile, scsi Kconfig Abhijeet Joglekar
5 siblings, 1 reply; 13+ messages in thread
From: Abhijeet Joglekar @ 2009-02-28 2:32 UTC (permalink / raw)
To: james.bottomley, linux-scsi; +Cc: abjoglek, jeykholt
fnic: add descriptor right, buffers, device interface
These files describe hardware descriptor, queue, buffer interface and also
control interfaces
Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com>
---
drivers/scsi/fnic/cq_desc.h | 78 ++++
drivers/scsi/fnic/cq_enet_desc.h | 167 +++++++++
drivers/scsi/fnic/cq_exch_desc.h | 182 ++++++++++
drivers/scsi/fnic/rq_enet_desc.h | 58 +++
drivers/scsi/fnic/vnic_cq.c | 86 +++++
drivers/scsi/fnic/vnic_cq.h | 121 ++++++
drivers/scsi/fnic/vnic_cq_copy.h | 62 +++
drivers/scsi/fnic/vnic_dev.c | 690 +++++++++++++++++++++++++++++++++++++
drivers/scsi/fnic/vnic_dev.h | 161 +++++++++
drivers/scsi/fnic/vnic_devcmd.h | 281 +++++++++++++++
drivers/scsi/fnic/vnic_intr.c | 60 +++
drivers/scsi/fnic/vnic_intr.h | 118 ++++++
drivers/scsi/fnic/vnic_nic.h | 69 ++++
drivers/scsi/fnic/vnic_resource.h | 61 +++
drivers/scsi/fnic/vnic_rq.c | 197 +++++++++++
drivers/scsi/fnic/vnic_rq.h | 235 +++++++++++++
drivers/scsi/fnic/vnic_scsi.h | 99 +++++
drivers/scsi/fnic/vnic_stats.h | 68 ++++
drivers/scsi/fnic/vnic_wq.c | 183 ++++++++++
drivers/scsi/fnic/vnic_wq.h | 175 +++++++++
drivers/scsi/fnic/vnic_wq_copy.c | 118 ++++++
drivers/scsi/fnic/vnic_wq_copy.h | 129 +++++++
drivers/scsi/fnic/wq_enet_desc.h | 96 +++++
23 files changed, 3494 insertions(+), 0 deletions(-)
create mode 100644 drivers/scsi/fnic/cq_desc.h
create mode 100644 drivers/scsi/fnic/cq_enet_desc.h
create mode 100644 drivers/scsi/fnic/cq_exch_desc.h
create mode 100644 drivers/scsi/fnic/rq_enet_desc.h
create mode 100644 drivers/scsi/fnic/vnic_cq.c
create mode 100644 drivers/scsi/fnic/vnic_cq.h
create mode 100644 drivers/scsi/fnic/vnic_cq_copy.h
create mode 100644 drivers/scsi/fnic/vnic_dev.c
create mode 100644 drivers/scsi/fnic/vnic_dev.h
create mode 100644 drivers/scsi/fnic/vnic_devcmd.h
create mode 100644 drivers/scsi/fnic/vnic_intr.c
create mode 100644 drivers/scsi/fnic/vnic_intr.h
create mode 100644 drivers/scsi/fnic/vnic_nic.h
create mode 100644 drivers/scsi/fnic/vnic_resource.h
create mode 100644 drivers/scsi/fnic/vnic_rq.c
create mode 100644 drivers/scsi/fnic/vnic_rq.h
create mode 100644 drivers/scsi/fnic/vnic_scsi.h
create mode 100644 drivers/scsi/fnic/vnic_stats.h
create mode 100644 drivers/scsi/fnic/vnic_wq.c
create mode 100644 drivers/scsi/fnic/vnic_wq.h
create mode 100644 drivers/scsi/fnic/vnic_wq_copy.c
create mode 100644 drivers/scsi/fnic/vnic_wq_copy.h
create mode 100644 drivers/scsi/fnic/wq_enet_desc.h
diff --git a/drivers/scsi/fnic/cq_desc.h b/drivers/scsi/fnic/cq_desc.h
new file mode 100644
index 0000000..d1225cf
--- /dev/null
+++ b/drivers/scsi/fnic/cq_desc.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _CQ_DESC_H_
+#define _CQ_DESC_H_
+
+/*
+ * Completion queue descriptor types
+ */
+enum cq_desc_types {
+ CQ_DESC_TYPE_WQ_ENET = 0,
+ CQ_DESC_TYPE_DESC_COPY = 1,
+ CQ_DESC_TYPE_WQ_EXCH = 2,
+ CQ_DESC_TYPE_RQ_ENET = 3,
+ CQ_DESC_TYPE_RQ_FCP = 4,
+};
+
+/* Completion queue descriptor: 16B
+ *
+ * All completion queues have this basic layout. The
+ * type_specfic area is unique for each completion
+ * queue type.
+ */
+struct cq_desc {
+ __le16 completed_index;
+ __le16 q_number;
+ u8 type_specfic[11];
+ u8 type_color;
+};
+
+#define CQ_DESC_TYPE_BITS 4
+#define CQ_DESC_TYPE_MASK ((1 << CQ_DESC_TYPE_BITS) - 1)
+#define CQ_DESC_COLOR_MASK 1
+#define CQ_DESC_COLOR_SHIFT 7
+#define CQ_DESC_Q_NUM_BITS 10
+#define CQ_DESC_Q_NUM_MASK ((1 << CQ_DESC_Q_NUM_BITS) - 1)
+#define CQ_DESC_COMP_NDX_BITS 12
+#define CQ_DESC_COMP_NDX_MASK ((1 << CQ_DESC_COMP_NDX_BITS) - 1)
+
+static inline void cq_desc_dec(const struct cq_desc *desc_arg,
+ u8 *type, u8 *color, u16 *q_number, u16 *completed_index)
+{
+ const struct cq_desc *desc = desc_arg;
+ const u8 type_color = desc->type_color;
+
+ *color = (type_color >> CQ_DESC_COLOR_SHIFT) & CQ_DESC_COLOR_MASK;
+
+ /*
+ * Make sure color bit is read from desc *before* other fields
+ * are read from desc. Hardware guarantees color bit is last
+ * bit (byte) written. Adding the rmb() prevents the compiler
+ * and/or CPU from reordering the reads which would potentially
+ * result in reading stale values.
+ */
+
+ rmb();
+
+ *type = type_color & CQ_DESC_TYPE_MASK;
+ *q_number = le16_to_cpu(desc->q_number) & CQ_DESC_Q_NUM_MASK;
+ *completed_index = le16_to_cpu(desc->completed_index) &
+ CQ_DESC_COMP_NDX_MASK;
+}
+
+#endif /* _CQ_DESC_H_ */
diff --git a/drivers/scsi/fnic/cq_enet_desc.h b/drivers/scsi/fnic/cq_enet_desc.h
new file mode 100644
index 0000000..a9fa26f
--- /dev/null
+++ b/drivers/scsi/fnic/cq_enet_desc.h
@@ -0,0 +1,167 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _CQ_ENET_DESC_H_
+#define _CQ_ENET_DESC_H_
+
+#include "cq_desc.h"
+
+/* Ethernet completion queue descriptor: 16B */
+struct cq_enet_wq_desc {
+ __le16 completed_index;
+ __le16 q_number;
+ u8 reserved[11];
+ u8 type_color;
+};
+
+static inline void cq_enet_wq_desc_dec(struct cq_enet_wq_desc *desc,
+ u8 *type, u8 *color, u16 *q_number, u16 *completed_index)
+{
+ cq_desc_dec((struct cq_desc *)desc, type,
+ color, q_number, completed_index);
+}
+
+/* Completion queue descriptor: Ethernet receive queue, 16B */
+struct cq_enet_rq_desc {
+ __le16 completed_index_flags;
+ __le16 q_number_rss_type_flags;
+ __le32 rss_hash;
+ __le16 bytes_written_flags;
+ __le16 vlan;
+ __le16 checksum_fcoe;
+ u8 flags;
+ u8 type_color;
+};
+
+#define CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT (0x1 << 12)
+#define CQ_ENET_RQ_DESC_FLAGS_FCOE (0x1 << 13)
+#define CQ_ENET_RQ_DESC_FLAGS_EOP (0x1 << 14)
+#define CQ_ENET_RQ_DESC_FLAGS_SOP (0x1 << 15)
+
+#define CQ_ENET_RQ_DESC_RSS_TYPE_BITS 4
+#define CQ_ENET_RQ_DESC_RSS_TYPE_MASK \
+ ((1 << CQ_ENET_RQ_DESC_RSS_TYPE_BITS) - 1)
+#define CQ_ENET_RQ_DESC_RSS_TYPE_NONE 0
+#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv4 1
+#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4 2
+#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6 3
+#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6 4
+#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX 5
+#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX 6
+
+#define CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC (0x1 << 14)
+
+#define CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS 14
+#define CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK \
+ ((1 << CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS) - 1)
+#define CQ_ENET_RQ_DESC_FLAGS_TRUNCATED (0x1 << 14)
+#define CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED (0x1 << 15)
+
+#define CQ_ENET_RQ_DESC_FCOE_SOF_BITS 4
+#define CQ_ENET_RQ_DESC_FCOE_SOF_MASK \
+ ((1 << CQ_ENET_RQ_DESC_FCOE_SOF_BITS) - 1)
+#define CQ_ENET_RQ_DESC_FCOE_EOF_BITS 8
+#define CQ_ENET_RQ_DESC_FCOE_EOF_MASK \
+ ((1 << CQ_ENET_RQ_DESC_FCOE_EOF_BITS) - 1)
+#define CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT 8
+
+#define CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK (0x1 << 0)
+#define CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK (0x1 << 0)
+#define CQ_ENET_RQ_DESC_FLAGS_UDP (0x1 << 1)
+#define CQ_ENET_RQ_DESC_FCOE_ENC_ERROR (0x1 << 1)
+#define CQ_ENET_RQ_DESC_FLAGS_TCP (0x1 << 2)
+#define CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK (0x1 << 3)
+#define CQ_ENET_RQ_DESC_FLAGS_IPV6 (0x1 << 4)
+#define CQ_ENET_RQ_DESC_FLAGS_IPV4 (0x1 << 5)
+#define CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT (0x1 << 6)
+#define CQ_ENET_RQ_DESC_FLAGS_FCS_OK (0x1 << 7)
+
+static inline void cq_enet_rq_desc_dec(struct cq_enet_rq_desc *desc,
+ u8 *type, u8 *color, u16 *q_number, u16 *completed_index,
+ u8 *ingress_port, u8 *fcoe, u8 *eop, u8 *sop, u8 *rss_type,
+ u8 *csum_not_calc, u32 *rss_hash, u16 *bytes_written, u8 *packet_error,
+ u8 *vlan_stripped, u16 *vlan, u16 *checksum, u8 *fcoe_sof,
+ u8 *fcoe_fc_crc_ok, u8 *fcoe_enc_error, u8 *fcoe_eof,
+ u8 *tcp_udp_csum_ok, u8 *udp, u8 *tcp, u8 *ipv4_csum_ok,
+ u8 *ipv6, u8 *ipv4, u8 *ipv4_fragment, u8 *fcs_ok)
+{
+ u16 completed_index_flags = le16_to_cpu(desc->completed_index_flags);
+ u16 q_number_rss_type_flags =
+ le16_to_cpu(desc->q_number_rss_type_flags);
+ u16 bytes_written_flags = le16_to_cpu(desc->bytes_written_flags);
+
+ cq_desc_dec((struct cq_desc *)desc, type,
+ color, q_number, completed_index);
+
+ *ingress_port = (completed_index_flags &
+ CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT) ? 1 : 0;
+ *fcoe = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_FCOE) ?
+ 1 : 0;
+ *eop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_EOP) ?
+ 1 : 0;
+ *sop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_SOP) ?
+ 1 : 0;
+
+ *rss_type = (u8)((q_number_rss_type_flags >> CQ_DESC_Q_NUM_BITS) &
+ CQ_ENET_RQ_DESC_RSS_TYPE_MASK);
+ *csum_not_calc = (q_number_rss_type_flags &
+ CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC) ? 1 : 0;
+
+ *rss_hash = le32_to_cpu(desc->rss_hash);
+
+ *bytes_written = bytes_written_flags &
+ CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK;
+ *packet_error = (bytes_written_flags &
+ CQ_ENET_RQ_DESC_FLAGS_TRUNCATED) ? 1 : 0;
+ *vlan_stripped = (bytes_written_flags &
+ CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED) ? 1 : 0;
+
+ *vlan = le16_to_cpu(desc->vlan);
+
+ if (*fcoe) {
+ *fcoe_sof = (u8)(le16_to_cpu(desc->checksum_fcoe) &
+ CQ_ENET_RQ_DESC_FCOE_SOF_MASK);
+ *fcoe_fc_crc_ok = (desc->flags &
+ CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK) ? 1 : 0;
+ *fcoe_enc_error = (desc->flags &
+ CQ_ENET_RQ_DESC_FCOE_ENC_ERROR) ? 1 : 0;
+ *fcoe_eof = (u8)((desc->checksum_fcoe >>
+ CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT) &
+ CQ_ENET_RQ_DESC_FCOE_EOF_MASK);
+ *checksum = 0;
+ } else {
+ *fcoe_sof = 0;
+ *fcoe_fc_crc_ok = 0;
+ *fcoe_enc_error = 0;
+ *fcoe_eof = 0;
+ *checksum = le16_to_cpu(desc->checksum_fcoe);
+ }
+
+ *tcp_udp_csum_ok =
+ (desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK) ? 1 : 0;
+ *udp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_UDP) ? 1 : 0;
+ *tcp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP) ? 1 : 0;
+ *ipv4_csum_ok =
+ (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK) ? 1 : 0;
+ *ipv6 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV6) ? 1 : 0;
+ *ipv4 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4) ? 1 : 0;
+ *ipv4_fragment =
+ (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT) ? 1 : 0;
+ *fcs_ok = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_FCS_OK) ? 1 : 0;
+}
+
+#endif /* _CQ_ENET_DESC_H_ */
diff --git a/drivers/scsi/fnic/cq_exch_desc.h b/drivers/scsi/fnic/cq_exch_desc.h
new file mode 100644
index 0000000..501660c
--- /dev/null
+++ b/drivers/scsi/fnic/cq_exch_desc.h
@@ -0,0 +1,182 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _CQ_EXCH_DESC_H_
+#define _CQ_EXCH_DESC_H_
+
+#include "cq_desc.h"
+
+/* Exchange completion queue descriptor: 16B */
+struct cq_exch_wq_desc {
+ u16 completed_index;
+ u16 q_number;
+ u16 exchange_id;
+ u8 tmpl;
+ u8 reserved0;
+ u32 reserved1;
+ u8 exch_status;
+ u8 reserved2[2];
+ u8 type_color;
+};
+
+#define CQ_EXCH_WQ_STATUS_BITS 2
+#define CQ_EXCH_WQ_STATUS_MASK ((1 << CQ_EXCH_WQ_STATUS_BITS) - 1)
+
+enum cq_exch_status_types {
+ CQ_EXCH_WQ_STATUS_TYPE_COMPLETE = 0,
+ CQ_EXCH_WQ_STATUS_TYPE_ABORT = 1,
+ CQ_EXCH_WQ_STATUS_TYPE_SGL_EOF = 2,
+ CQ_EXCH_WQ_STATUS_TYPE_TMPL_ERR = 3,
+};
+
+static inline void cq_exch_wq_desc_dec(struct cq_exch_wq_desc *desc_ptr,
+ u8 *type,
+ u8 *color,
+ u16 *q_number,
+ u16 *completed_index,
+ u8 *exch_status)
+{
+ cq_desc_dec((struct cq_desc *)desc_ptr, type,
+ color, q_number, completed_index);
+ *exch_status = desc_ptr->exch_status & CQ_EXCH_WQ_STATUS_MASK;
+}
+
+struct cq_fcp_rq_desc {
+ u16 completed_index_eop_sop_prt;
+ u16 q_number;
+ u16 exchange_id;
+ u16 tmpl;
+ u16 bytes_written;
+ u16 vlan;
+ u8 sof;
+ u8 eof;
+ u8 fcs_fer_fck;
+ u8 type_color;
+};
+
+#define CQ_FCP_RQ_DESC_FLAGS_SOP (1 << 15)
+#define CQ_FCP_RQ_DESC_FLAGS_EOP (1 << 14)
+#define CQ_FCP_RQ_DESC_FLAGS_PRT (1 << 12)
+#define CQ_FCP_RQ_DESC_TMPL_MASK 0x1f
+#define CQ_FCP_RQ_DESC_BYTES_WRITTEN_MASK 0x3fff
+#define CQ_FCP_RQ_DESC_PACKET_ERR_SHIFT 14
+#define CQ_FCP_RQ_DESC_PACKET_ERR_MASK (1 << CQ_FCP_RQ_DESC_PACKET_ERR_SHIFT)
+#define CQ_FCP_RQ_DESC_VS_STRIPPED_SHIFT 15
+#define CQ_FCP_RQ_DESC_VS_STRIPPED_MASK (1 << CQ_FCP_RQ_DESC_VS_STRIPPED_SHIFT)
+#define CQ_FCP_RQ_DESC_FC_CRC_OK_MASK 0x1
+#define CQ_FCP_RQ_DESC_FCOE_ERR_SHIFT 1
+#define CQ_FCP_RQ_DESC_FCOE_ERR_MASK (1 << CQ_FCP_RQ_DESC_FCOE_ERR_SHIFT)
+#define CQ_FCP_RQ_DESC_FCS_OK_SHIFT 7
+#define CQ_FCP_RQ_DESC_FCS_OK_MASK (1 << CQ_FCP_RQ_DESC_FCS_OK_SHIFT)
+
+static inline void cq_fcp_rq_desc_dec(struct cq_fcp_rq_desc *desc_ptr,
+ u8 *type,
+ u8 *color,
+ u16 *q_number,
+ u16 *completed_index,
+ u8 *eop,
+ u8 *sop,
+ u8 *fck,
+ u16 *exchange_id,
+ u16 *tmpl,
+ u32 *bytes_written,
+ u8 *sof,
+ u8 *eof,
+ u8 *ingress_port,
+ u8 *packet_err,
+ u8 *fcoe_err,
+ u8 *fcs_ok,
+ u8 *vlan_stripped,
+ u16 *vlan)
+{
+ cq_desc_dec((struct cq_desc *)desc_ptr, type,
+ color, q_number, completed_index);
+ *eop = (desc_ptr->completed_index_eop_sop_prt &
+ CQ_FCP_RQ_DESC_FLAGS_EOP) ? 1 : 0;
+ *sop = (desc_ptr->completed_index_eop_sop_prt &
+ CQ_FCP_RQ_DESC_FLAGS_SOP) ? 1 : 0;
+ *ingress_port =
+ (desc_ptr->completed_index_eop_sop_prt &
+ CQ_FCP_RQ_DESC_FLAGS_PRT) ? 1 : 0;
+ *exchange_id = desc_ptr->exchange_id;
+ *tmpl = desc_ptr->tmpl & CQ_FCP_RQ_DESC_TMPL_MASK;
+ *bytes_written =
+ desc_ptr->bytes_written & CQ_FCP_RQ_DESC_BYTES_WRITTEN_MASK;
+ *packet_err =
+ (desc_ptr->bytes_written & CQ_FCP_RQ_DESC_PACKET_ERR_MASK) >>
+ CQ_FCP_RQ_DESC_PACKET_ERR_SHIFT;
+ *vlan_stripped =
+ (desc_ptr->bytes_written & CQ_FCP_RQ_DESC_VS_STRIPPED_MASK) >>
+ CQ_FCP_RQ_DESC_VS_STRIPPED_SHIFT;
+ *vlan = desc_ptr->vlan;
+ *sof = desc_ptr->sof;
+ *fck = desc_ptr->fcs_fer_fck & CQ_FCP_RQ_DESC_FC_CRC_OK_MASK;
+ *fcoe_err = (desc_ptr->fcs_fer_fck & CQ_FCP_RQ_DESC_FCOE_ERR_MASK) >>
+ CQ_FCP_RQ_DESC_FCOE_ERR_SHIFT;
+ *eof = desc_ptr->eof;
+ *fcs_ok =
+ (desc_ptr->fcs_fer_fck & CQ_FCP_RQ_DESC_FCS_OK_MASK) >>
+ CQ_FCP_RQ_DESC_FCS_OK_SHIFT;
+}
+
+struct cq_sgl_desc {
+ u16 exchange_id;
+ u16 q_number;
+ u32 active_burst_offset;
+ u32 tot_data_bytes;
+ u16 tmpl;
+ u8 sgl_err;
+ u8 type_color;
+};
+
+enum cq_sgl_err_types {
+ CQ_SGL_ERR_NO_ERROR = 0,
+ CQ_SGL_ERR_OVERFLOW, /* data ran beyond end of SGL */
+ CQ_SGL_ERR_SGL_LCL_ADDR_ERR, /* sgl access to local vnic addr illegal*/
+ CQ_SGL_ERR_ADDR_RSP_ERR, /* sgl address error */
+ CQ_SGL_ERR_DATA_RSP_ERR, /* sgl data rsp error */
+ CQ_SGL_ERR_CNT_ZERO_ERR, /* SGL count is 0 */
+ CQ_SGL_ERR_CNT_MAX_ERR, /* SGL count is larger than supported */
+ CQ_SGL_ERR_ORDER_ERR, /* frames recv on both ports, order err */
+ CQ_SGL_ERR_DATA_LCL_ADDR_ERR,/* sgl data buf to local vnic addr ill */
+ CQ_SGL_ERR_HOST_CQ_ERR, /* host cq entry to local vnic addr ill */
+};
+
+#define CQ_SGL_SGL_ERR_MASK 0x1f
+#define CQ_SGL_TMPL_MASK 0x1f
+
+static inline void cq_sgl_desc_dec(struct cq_sgl_desc *desc_ptr,
+ u8 *type,
+ u8 *color,
+ u16 *q_number,
+ u16 *exchange_id,
+ u32 *active_burst_offset,
+ u32 *tot_data_bytes,
+ u16 *tmpl,
+ u8 *sgl_err)
+{
+ /* Cheat a little by assuming exchange_id is the same as completed
+ index */
+ cq_desc_dec((struct cq_desc *)desc_ptr, type, color, q_number,
+ exchange_id);
+ *active_burst_offset = desc_ptr->active_burst_offset;
+ *tot_data_bytes = desc_ptr->tot_data_bytes;
+ *tmpl = desc_ptr->tmpl & CQ_SGL_TMPL_MASK;
+ *sgl_err = desc_ptr->sgl_err & CQ_SGL_SGL_ERR_MASK;
+}
+
+#endif /* _CQ_EXCH_DESC_H_ */
diff --git a/drivers/scsi/fnic/rq_enet_desc.h b/drivers/scsi/fnic/rq_enet_desc.h
new file mode 100644
index 0000000..92e80ae
--- /dev/null
+++ b/drivers/scsi/fnic/rq_enet_desc.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _RQ_ENET_DESC_H_
+#define _RQ_ENET_DESC_H_
+
+/* Ethernet receive queue descriptor: 16B */
+struct rq_enet_desc {
+ __le64 address;
+ __le16 length_type;
+ u8 reserved[6];
+};
+
+enum rq_enet_type_types {
+ RQ_ENET_TYPE_ONLY_SOP = 0,
+ RQ_ENET_TYPE_NOT_SOP = 1,
+ RQ_ENET_TYPE_RESV2 = 2,
+ RQ_ENET_TYPE_RESV3 = 3,
+};
+
+#define RQ_ENET_ADDR_BITS 64
+#define RQ_ENET_LEN_BITS 14
+#define RQ_ENET_LEN_MASK ((1 << RQ_ENET_LEN_BITS) - 1)
+#define RQ_ENET_TYPE_BITS 2
+#define RQ_ENET_TYPE_MASK ((1 << RQ_ENET_TYPE_BITS) - 1)
+
+static inline void rq_enet_desc_enc(struct rq_enet_desc *desc,
+ u64 address, u8 type, u16 length)
+{
+ desc->address = cpu_to_le64(address);
+ desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) |
+ ((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS));
+}
+
+static inline void rq_enet_desc_dec(struct rq_enet_desc *desc,
+ u64 *address, u8 *type, u16 *length)
+{
+ *address = le64_to_cpu(desc->address);
+ *length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK;
+ *type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) &
+ RQ_ENET_TYPE_MASK);
+}
+
+#endif /* _RQ_ENET_DESC_H_ */
diff --git a/drivers/scsi/fnic/vnic_cq.c b/drivers/scsi/fnic/vnic_cq.c
new file mode 100644
index 0000000..ac6ace3
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_cq.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include "vnic_dev.h"
+#include "vnic_cq.h"
+
+void vnic_cq_free(struct vnic_cq *cq)
+{
+ vnic_dev_free_desc_ring(cq->vdev, &cq->ring);
+
+ cq->ctrl = NULL;
+}
+
+int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
+ unsigned int desc_count, unsigned int desc_size)
+{
+ int err;
+
+ cq->index = index;
+ cq->vdev = vdev;
+
+ cq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_CQ, index);
+ if (!cq->ctrl) {
+ printk(KERN_ERR "Failed to hook CQ[%d] resource\n", index);
+ return -EINVAL;
+ }
+
+ err = vnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
+ unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
+ unsigned int cq_tail_color, unsigned int interrupt_enable,
+ unsigned int cq_entry_enable, unsigned int cq_message_enable,
+ unsigned int interrupt_offset, u64 cq_message_addr)
+{
+ u64 paddr;
+
+ paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET;
+ writeq(paddr, &cq->ctrl->ring_base);
+ iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size);
+ iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable);
+ iowrite32(color_enable, &cq->ctrl->color_enable);
+ iowrite32(cq_head, &cq->ctrl->cq_head);
+ iowrite32(cq_tail, &cq->ctrl->cq_tail);
+ iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color);
+ iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable);
+ iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable);
+ iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable);
+ iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset);
+ writeq(cq_message_addr, &cq->ctrl->cq_message_addr);
+}
+
+void vnic_cq_clean(struct vnic_cq *cq)
+{
+ cq->to_clean = 0;
+ cq->last_color = 0;
+
+ iowrite32(0, &cq->ctrl->cq_head);
+ iowrite32(0, &cq->ctrl->cq_tail);
+ iowrite32(1, &cq->ctrl->cq_tail_color);
+
+ vnic_dev_clear_desc_ring(&cq->ring);
+}
diff --git a/drivers/scsi/fnic/vnic_cq.h b/drivers/scsi/fnic/vnic_cq.h
new file mode 100644
index 0000000..4ede680
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_cq.h
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_CQ_H_
+#define _VNIC_CQ_H_
+
+#include "cq_desc.h"
+#include "vnic_dev.h"
+
+/*
+ * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
+ * Driver) when both are built with CONFIG options =y
+ */
+#define vnic_cq_service fnic_cq_service
+#define vnic_cq_free fnic_cq_free
+#define vnic_cq_alloc fnic_cq_alloc
+#define vnic_cq_init fnic_cq_init
+#define vnic_cq_clean fnic_cq_clean
+
+/* Completion queue control */
+struct vnic_cq_ctrl {
+ u64 ring_base; /* 0x00 */
+ u32 ring_size; /* 0x08 */
+ u32 pad0;
+ u32 flow_control_enable; /* 0x10 */
+ u32 pad1;
+ u32 color_enable; /* 0x18 */
+ u32 pad2;
+ u32 cq_head; /* 0x20 */
+ u32 pad3;
+ u32 cq_tail; /* 0x28 */
+ u32 pad4;
+ u32 cq_tail_color; /* 0x30 */
+ u32 pad5;
+ u32 interrupt_enable; /* 0x38 */
+ u32 pad6;
+ u32 cq_entry_enable; /* 0x40 */
+ u32 pad7;
+ u32 cq_message_enable; /* 0x48 */
+ u32 pad8;
+ u32 interrupt_offset; /* 0x50 */
+ u32 pad9;
+ u64 cq_message_addr; /* 0x58 */
+ u32 pad10;
+};
+
+struct vnic_cq {
+ unsigned int index;
+ struct vnic_dev *vdev;
+ struct vnic_cq_ctrl __iomem *ctrl; /* memory-mapped */
+ struct vnic_dev_ring ring;
+ unsigned int to_clean;
+ unsigned int last_color;
+};
+
+static inline unsigned int vnic_cq_service(struct vnic_cq *cq,
+ unsigned int work_to_do,
+ int (*q_service)(struct vnic_dev *vdev, struct cq_desc *cq_desc,
+ u8 type, u16 q_number, u16 completed_index, void *opaque),
+ void *opaque)
+{
+ struct cq_desc *cq_desc;
+ unsigned int work_done = 0;
+ u16 q_number, completed_index;
+ u8 type, color;
+
+ cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
+ cq->ring.desc_size * cq->to_clean);
+ cq_desc_dec(cq_desc, &type, &color,
+ &q_number, &completed_index);
+
+ while (color != cq->last_color) {
+
+ if ((*q_service)(cq->vdev, cq_desc, type,
+ q_number, completed_index, opaque))
+ break;
+
+ cq->to_clean++;
+ if (cq->to_clean == cq->ring.desc_count) {
+ cq->to_clean = 0;
+ cq->last_color = cq->last_color ? 0 : 1;
+ }
+
+ cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
+ cq->ring.desc_size * cq->to_clean);
+ cq_desc_dec(cq_desc, &type, &color,
+ &q_number, &completed_index);
+
+ work_done++;
+ if (work_done >= work_to_do)
+ break;
+ }
+
+ return work_done;
+}
+
+void vnic_cq_free(struct vnic_cq *cq);
+int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
+ unsigned int desc_count, unsigned int desc_size);
+void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
+ unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
+ unsigned int cq_tail_color, unsigned int interrupt_enable,
+ unsigned int cq_entry_enable, unsigned int message_enable,
+ unsigned int interrupt_offset, u64 message_addr);
+void vnic_cq_clean(struct vnic_cq *cq);
+
+#endif /* _VNIC_CQ_H_ */
diff --git a/drivers/scsi/fnic/vnic_cq_copy.h b/drivers/scsi/fnic/vnic_cq_copy.h
new file mode 100644
index 0000000..7901ce2
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_cq_copy.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_CQ_COPY_H_
+#define _VNIC_CQ_COPY_H_
+
+#include "fcpio.h"
+
+static inline unsigned int vnic_cq_copy_service(
+ struct vnic_cq *cq,
+ int (*q_service)(struct vnic_dev *vdev,
+ unsigned int index,
+ struct fcpio_fw_req *desc),
+ unsigned int work_to_do)
+
+{
+ struct fcpio_fw_req *desc;
+ unsigned int work_done = 0;
+ u8 color;
+
+ desc = (struct fcpio_fw_req *)((u8 *)cq->ring.descs +
+ cq->ring.desc_size * cq->to_clean);
+ fcpio_color_dec(desc, &color);
+
+ while (color != cq->last_color) {
+
+ if ((*q_service)(cq->vdev, cq->index, desc))
+ break;
+
+ cq->to_clean++;
+ if (cq->to_clean == cq->ring.desc_count) {
+ cq->to_clean = 0;
+ cq->last_color = cq->last_color ? 0 : 1;
+ }
+
+ desc = (struct fcpio_fw_req *)((u8 *)cq->ring.descs +
+ cq->ring.desc_size * cq->to_clean);
+ fcpio_color_dec(desc, &color);
+
+ work_done++;
+ if (work_done >= work_to_do)
+ break;
+ }
+
+ return work_done;
+}
+
+#endif /* _VNIC_CQ_COPY_H_ */
diff --git a/drivers/scsi/fnic/vnic_dev.c b/drivers/scsi/fnic/vnic_dev.c
new file mode 100644
index 0000000..37cbd13
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_dev.c
@@ -0,0 +1,690 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/if_ether.h>
+#include "vnic_resource.h"
+#include "vnic_devcmd.h"
+#include "vnic_dev.h"
+#include "vnic_stats.h"
+
+struct vnic_res {
+ void __iomem *vaddr;
+ unsigned int count;
+};
+
+struct vnic_dev {
+ void *priv;
+ struct pci_dev *pdev;
+ struct vnic_res res[RES_TYPE_MAX];
+ enum vnic_dev_intr_mode intr_mode;
+ struct vnic_devcmd __iomem *devcmd;
+ struct vnic_devcmd_notify *notify;
+ struct vnic_devcmd_notify notify_copy;
+ dma_addr_t notify_pa;
+ u32 *linkstatus;
+ dma_addr_t linkstatus_pa;
+ struct vnic_stats *stats;
+ dma_addr_t stats_pa;
+ struct vnic_devcmd_fw_info *fw_info;
+ dma_addr_t fw_info_pa;
+};
+
+#define VNIC_MAX_RES_HDR_SIZE \
+ (sizeof(struct vnic_resource_header) + \
+ sizeof(struct vnic_resource) * RES_TYPE_MAX)
+#define VNIC_RES_STRIDE 128
+
+void *vnic_dev_priv(struct vnic_dev *vdev)
+{
+ return vdev->priv;
+}
+
+static int vnic_dev_discover_res(struct vnic_dev *vdev,
+ struct vnic_dev_bar *bar)
+{
+ struct vnic_resource_header __iomem *rh;
+ struct vnic_resource __iomem *r;
+ u8 type;
+
+ if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
+ printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
+ return -EINVAL;
+ }
+
+ rh = bar->vaddr;
+ if (!rh) {
+ printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
+ return -EINVAL;
+ }
+
+ if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
+ ioread32(&rh->version) != VNIC_RES_VERSION) {
+ printk(KERN_ERR "vNIC BAR0 res magic/version error "
+ "exp (%lx/%lx) curr (%x/%x)\n",
+ VNIC_RES_MAGIC, VNIC_RES_VERSION,
+ ioread32(&rh->magic), ioread32(&rh->version));
+ return -EINVAL;
+ }
+
+ r = (struct vnic_resource __iomem *)(rh + 1);
+
+ while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
+
+ u8 bar_num = ioread8(&r->bar);
+ u32 bar_offset = ioread32(&r->bar_offset);
+ u32 count = ioread32(&r->count);
+ u32 len;
+
+ r++;
+
+ if (bar_num != 0) /* only mapping in BAR0 resources */
+ continue;
+
+ switch (type) {
+ case RES_TYPE_WQ:
+ case RES_TYPE_RQ:
+ case RES_TYPE_CQ:
+ case RES_TYPE_INTR_CTRL:
+ /* each count is stride bytes long */
+ len = count * VNIC_RES_STRIDE;
+ if (len + bar_offset > bar->len) {
+ printk(KERN_ERR "vNIC BAR0 resource %d "
+ "out-of-bounds, offset 0x%x + "
+ "size 0x%x > bar len 0x%lx\n",
+ type, bar_offset,
+ len,
+ bar->len);
+ return -EINVAL;
+ }
+ break;
+ case RES_TYPE_INTR_PBA_LEGACY:
+ case RES_TYPE_DEVCMD:
+ len = count;
+ break;
+ default:
+ continue;
+ }
+
+ vdev->res[type].count = count;
+ vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
+ }
+
+ return 0;
+}
+
+unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
+ enum vnic_res_type type)
+{
+ return vdev->res[type].count;
+}
+
+void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
+ unsigned int index)
+{
+ if (!vdev->res[type].vaddr)
+ return NULL;
+
+ switch (type) {
+ case RES_TYPE_WQ:
+ case RES_TYPE_RQ:
+ case RES_TYPE_CQ:
+ case RES_TYPE_INTR_CTRL:
+ return (char __iomem *)vdev->res[type].vaddr +
+ index * VNIC_RES_STRIDE;
+ default:
+ return (char __iomem *)vdev->res[type].vaddr;
+ }
+}
+
+unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
+ unsigned int desc_count,
+ unsigned int desc_size)
+{
+ /* The base address of the desc rings must be 512 byte aligned.
+ * Descriptor count is aligned to groups of 32 descriptors. A
+ * count of 0 means the maximum 4096 descriptors. Descriptor
+ * size is aligned to 16 bytes.
+ */
+
+ unsigned int count_align = 32;
+ unsigned int desc_align = 16;
+
+ ring->base_align = 512;
+
+ if (desc_count == 0)
+ desc_count = 4096;
+
+ ring->desc_count = ALIGN(desc_count, count_align);
+
+ ring->desc_size = ALIGN(desc_size, desc_align);
+
+ ring->size = ring->desc_count * ring->desc_size;
+ ring->size_unaligned = ring->size + ring->base_align;
+
+ return ring->size_unaligned;
+}
+
+void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
+{
+ memset(ring->descs, 0, ring->size);
+}
+
+int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
+ unsigned int desc_count, unsigned int desc_size)
+{
+ vnic_dev_desc_ring_size(ring, desc_count, desc_size);
+
+ ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
+ ring->size_unaligned,
+ &ring->base_addr_unaligned);
+
+ if (!ring->descs_unaligned) {
+ printk(KERN_ERR
+ "Failed to allocate ring (size=%d), aborting\n",
+ (int)ring->size);
+ return -ENOMEM;
+ }
+
+ ring->base_addr = ALIGN(ring->base_addr_unaligned,
+ ring->base_align);
+ ring->descs = (u8 *)ring->descs_unaligned +
+ (ring->base_addr - ring->base_addr_unaligned);
+
+ vnic_dev_clear_desc_ring(ring);
+
+ ring->desc_avail = ring->desc_count - 1;
+
+ return 0;
+}
+
+void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
+{
+ if (ring->descs) {
+ pci_free_consistent(vdev->pdev,
+ ring->size_unaligned,
+ ring->descs_unaligned,
+ ring->base_addr_unaligned);
+ ring->descs = NULL;
+ }
+}
+
+int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
+ u64 *a0, u64 *a1, int wait)
+{
+ struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
+ int delay;
+ u32 status;
+ int dev_cmd_err[] = {
+ /* convert from fw's version of error.h to host's version */
+ 0, /* ERR_SUCCESS */
+ EINVAL, /* ERR_EINVAL */
+ EFAULT, /* ERR_EFAULT */
+ EPERM, /* ERR_EPERM */
+ EBUSY, /* ERR_EBUSY */
+ };
+ int err;
+
+ status = ioread32(&devcmd->status);
+ if (status & STAT_BUSY) {
+ printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
+ return -EBUSY;
+ }
+
+ if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
+ writeq(*a0, &devcmd->args[0]);
+ writeq(*a1, &devcmd->args[1]);
+ wmb();
+ }
+
+ iowrite32(cmd, &devcmd->cmd);
+
+ if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
+ return 0;
+
+ for (delay = 0; delay < wait; delay++) {
+
+ udelay(100);
+
+ status = ioread32(&devcmd->status);
+ if (!(status & STAT_BUSY)) {
+
+ if (status & STAT_ERROR) {
+ err = dev_cmd_err[(int)readq(&devcmd->args[0])];
+ printk(KERN_ERR "Error %d devcmd %d\n",
+ err, _CMD_N(cmd));
+ return -err;
+ }
+
+ if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
+ rmb();
+ *a0 = readq(&devcmd->args[0]);
+ *a1 = readq(&devcmd->args[1]);
+ }
+
+ return 0;
+ }
+ }
+
+ printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
+ return -ETIMEDOUT;
+}
+
+int vnic_dev_fw_info(struct vnic_dev *vdev,
+ struct vnic_devcmd_fw_info **fw_info)
+{
+ u64 a0, a1 = 0;
+ int wait = 1000;
+ int err = 0;
+
+ if (!vdev->fw_info) {
+ vdev->fw_info = pci_alloc_consistent(vdev->pdev,
+ sizeof(struct vnic_devcmd_fw_info),
+ &vdev->fw_info_pa);
+ if (!vdev->fw_info)
+ return -ENOMEM;
+
+ a0 = vdev->fw_info_pa;
+
+ /* only get fw_info once and cache it */
+ err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
+ }
+
+ *fw_info = vdev->fw_info;
+
+ return err;
+}
+
+int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
+ void *value)
+{
+ u64 a0, a1;
+ int wait = 1000;
+ int err;
+
+ a0 = offset;
+ a1 = size;
+
+ err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
+
+ switch (size) {
+ case 1:
+ *(u8 *)value = (u8)a0;
+ break;
+ case 2:
+ *(u16 *)value = (u16)a0;
+ break;
+ case 4:
+ *(u32 *)value = (u32)a0;
+ break;
+ case 8:
+ *(u64 *)value = a0;
+ break;
+ default:
+ BUG();
+ break;
+ }
+
+ return err;
+}
+
+int vnic_dev_stats_clear(struct vnic_dev *vdev)
+{
+ u64 a0 = 0, a1 = 0;
+ int wait = 1000;
+ return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
+}
+
+int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
+{
+ u64 a0, a1;
+ int wait = 1000;
+
+ if (!vdev->stats) {
+ vdev->stats = pci_alloc_consistent(vdev->pdev,
+ sizeof(struct vnic_stats), &vdev->stats_pa);
+ if (!vdev->stats)
+ return -ENOMEM;
+ }
+
+ *stats = vdev->stats;
+ a0 = vdev->stats_pa;
+ a1 = sizeof(struct vnic_stats);
+
+ return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
+}
+
+int vnic_dev_close(struct vnic_dev *vdev)
+{
+ u64 a0 = 0, a1 = 0;
+ int wait = 1000;
+ return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
+}
+
+int vnic_dev_enable(struct vnic_dev *vdev)
+{
+ u64 a0 = 0, a1 = 0;
+ int wait = 1000;
+ return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
+}
+
+int vnic_dev_disable(struct vnic_dev *vdev)
+{
+ u64 a0 = 0, a1 = 0;
+ int wait = 1000;
+ return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
+}
+
+int vnic_dev_open(struct vnic_dev *vdev, int arg)
+{
+ u64 a0 = (u32)arg, a1 = 0;
+ int wait = 1000;
+ return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
+}
+
+int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
+{
+ u64 a0 = 0, a1 = 0;
+ int wait = 1000;
+ int err;
+
+ *done = 0;
+
+ err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
+ if (err)
+ return err;
+
+ *done = (a0 == 0);
+
+ return 0;
+}
+
+int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
+{
+ u64 a0 = (u32)arg, a1 = 0;
+ int wait = 1000;
+ return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
+}
+
+int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
+{
+ u64 a0 = 0, a1 = 0;
+ int wait = 1000;
+ int err;
+
+ *done = 0;
+
+ err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
+ if (err)
+ return err;
+
+ *done = (a0 == 0);
+
+ return 0;
+}
+
+int vnic_dev_hang_notify(struct vnic_dev *vdev)
+{
+ u64 a0, a1;
+ int wait = 1000;
+ return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
+}
+
+int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
+{
+ u64 a0, a1;
+ int wait = 1000;
+ int err, i;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ mac_addr[i] = 0;
+
+ err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
+ if (err)
+ return err;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ mac_addr[i] = ((u8 *)&a0)[i];
+
+ return 0;
+}
+
+void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
+ int broadcast, int promisc, int allmulti)
+{
+ u64 a0, a1 = 0;
+ int wait = 1000;
+ int err;
+
+ a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
+ (multicast ? CMD_PFILTER_MULTICAST : 0) |
+ (broadcast ? CMD_PFILTER_BROADCAST : 0) |
+ (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
+ (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
+
+ err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
+ if (err)
+ printk(KERN_ERR "Can't set packet filter\n");
+}
+
+void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
+{
+ u64 a0 = 0, a1 = 0;
+ int wait = 1000;
+ int err;
+ int i;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ ((u8 *)&a0)[i] = addr[i];
+
+ err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
+ if (err)
+ printk(KERN_ERR
+ "Can't add addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
+ addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
+ err);
+}
+
+void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
+{
+ u64 a0 = 0, a1 = 0;
+ int wait = 1000;
+ int err;
+ int i;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ ((u8 *)&a0)[i] = addr[i];
+
+ err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
+ if (err)
+ printk(KERN_ERR
+ "Can't del addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
+ addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
+ err);
+}
+
+int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
+{
+ u64 a0, a1;
+ int wait = 1000;
+
+ if (!vdev->notify) {
+ vdev->notify = pci_alloc_consistent(vdev->pdev,
+ sizeof(struct vnic_devcmd_notify),
+ &vdev->notify_pa);
+ if (!vdev->notify)
+ return -ENOMEM;
+ }
+
+ a0 = vdev->notify_pa;
+ a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
+ a1 += sizeof(struct vnic_devcmd_notify);
+
+ return vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
+}
+
+void vnic_dev_notify_unset(struct vnic_dev *vdev)
+{
+ u64 a0, a1;
+ int wait = 1000;
+
+ a0 = 0; /* paddr = 0 to unset notify buffer */
+ a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
+ a1 += sizeof(struct vnic_devcmd_notify);
+
+ vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
+}
+
+static int vnic_dev_notify_ready(struct vnic_dev *vdev)
+{
+ u32 *words;
+ unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
+ unsigned int i;
+ u32 csum;
+
+ if (!vdev->notify)
+ return 0;
+
+ do {
+ csum = 0;
+ memcpy(&vdev->notify_copy, vdev->notify,
+ sizeof(struct vnic_devcmd_notify));
+ words = (u32 *)&vdev->notify_copy;
+ for (i = 1; i < nwords; i++)
+ csum += words[i];
+ } while (csum != words[0]);
+
+ return 1;
+}
+
+int vnic_dev_init(struct vnic_dev *vdev, int arg)
+{
+ u64 a0 = (u32)arg, a1 = 0;
+ int wait = 1000;
+ return vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
+}
+
+int vnic_dev_link_status(struct vnic_dev *vdev)
+{
+ if (vdev->linkstatus)
+ return *vdev->linkstatus;
+
+ if (!vnic_dev_notify_ready(vdev))
+ return 0;
+
+ return vdev->notify_copy.link_state;
+}
+
+u32 vnic_dev_port_speed(struct vnic_dev *vdev)
+{
+ if (!vnic_dev_notify_ready(vdev))
+ return 0;
+
+ return vdev->notify_copy.port_speed;
+}
+
+u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
+{
+ if (!vnic_dev_notify_ready(vdev))
+ return 0;
+
+ return vdev->notify_copy.msglvl;
+}
+
+u32 vnic_dev_mtu(struct vnic_dev *vdev)
+{
+ if (!vnic_dev_notify_ready(vdev))
+ return 0;
+
+ return vdev->notify_copy.mtu;
+}
+
+u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev)
+{
+ if (!vnic_dev_notify_ready(vdev))
+ return 0;
+
+ return vdev->notify_copy.link_down_cnt;
+}
+
+void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
+ enum vnic_dev_intr_mode intr_mode)
+{
+ vdev->intr_mode = intr_mode;
+}
+
+enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
+ struct vnic_dev *vdev)
+{
+ return vdev->intr_mode;
+}
+
+void vnic_dev_unregister(struct vnic_dev *vdev)
+{
+ if (vdev) {
+ if (vdev->notify)
+ pci_free_consistent(vdev->pdev,
+ sizeof(struct vnic_devcmd_notify),
+ vdev->notify,
+ vdev->notify_pa);
+ if (vdev->linkstatus)
+ pci_free_consistent(vdev->pdev,
+ sizeof(u32),
+ vdev->linkstatus,
+ vdev->linkstatus_pa);
+ if (vdev->stats)
+ pci_free_consistent(vdev->pdev,
+ sizeof(struct vnic_dev),
+ vdev->stats, vdev->stats_pa);
+ if (vdev->fw_info)
+ pci_free_consistent(vdev->pdev,
+ sizeof(struct vnic_devcmd_fw_info),
+ vdev->fw_info, vdev->fw_info_pa);
+ kfree(vdev);
+ }
+}
+
+struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
+ void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar)
+{
+ if (!vdev) {
+ vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
+ if (!vdev)
+ return NULL;
+ }
+
+ vdev->priv = priv;
+ vdev->pdev = pdev;
+
+ if (vnic_dev_discover_res(vdev, bar))
+ goto err_out;
+
+ vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
+ if (!vdev->devcmd)
+ goto err_out;
+
+ return vdev;
+
+err_out:
+ vnic_dev_unregister(vdev);
+ return NULL;
+}
diff --git a/drivers/scsi/fnic/vnic_dev.h b/drivers/scsi/fnic/vnic_dev.h
new file mode 100644
index 0000000..f9935a8
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_dev.h
@@ -0,0 +1,161 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_DEV_H_
+#define _VNIC_DEV_H_
+
+#include "vnic_resource.h"
+#include "vnic_devcmd.h"
+
+/*
+ * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
+ * Driver) when both are built with CONFIG options =y
+ */
+#define vnic_dev_priv fnic_dev_priv
+#define vnic_dev_get_res_count fnic_dev_get_res_count
+#define vnic_dev_get_res fnic_dev_get_res
+#define vnic_dev_desc_ring_size fnic_dev_desc_ring_siz
+#define vnic_dev_clear_desc_ring fnic_dev_clear_desc_ring
+#define vnic_dev_alloc_desc_ring fnic_dev_alloc_desc_ring
+#define vnic_dev_free_desc_ring fnic_dev_free_desc_ring
+#define vnic_dev_cmd fnic_dev_cmd
+#define vnic_dev_fw_info fnic_dev_fw_info
+#define vnic_dev_spec fnic_dev_spec
+#define vnic_dev_stats_clear fnic_dev_stats_clear
+#define vnic_dev_stats_dump fnic_dev_stats_dump
+#define vnic_dev_hang_notify fnic_dev_hang_notify
+#define vnic_dev_packet_filter fnic_dev_packet_filter
+#define vnic_dev_add_addr fnic_dev_add_addr
+#define vnic_dev_del_addr fnic_dev_del_addr
+#define vnic_dev_mac_addr fnic_dev_mac_addr
+#define vnic_dev_notify_set fnic_dev_notify_set
+#define vnic_dev_notify_unset fnic_dev_notify_unset
+#define vnic_dev_link_status fnic_dev_link_status
+#define vnic_dev_port_speed fnic_dev_port_speed
+#define vnic_dev_msg_lvl fnic_dev_msg_lvl
+#define vnic_dev_mtu fnic_dev_mtu
+#define vnic_dev_link_down_cnt fnic_dev_link_down_cnt
+#define vnic_dev_close fnic_dev_close
+#define vnic_dev_enable fnic_dev_enable
+#define vnic_dev_disable fnic_dev_disable
+#define vnic_dev_open fnic_dev_open
+#define vnic_dev_open_done fnic_dev_open_done
+#define vnic_dev_init fnic_dev_init
+#define vnic_dev_soft_reset fnic_dev_soft_reset
+#define vnic_dev_soft_reset_done fnic_dev_soft_reset_done
+#define vnic_dev_set_intr_mode fnic_dev_set_intr_mode
+#define vnic_dev_get_intr_mode fnic_dev_get_intr_mode
+#define vnic_dev_unregister fnic_dev_unregister
+#define vnic_dev_register fnic_dev_register
+
+#ifndef VNIC_PADDR_TARGET
+#define VNIC_PADDR_TARGET 0x0000000000000000ULL
+#endif
+
+#ifndef readq
+static inline u64 readq(void __iomem *reg)
+{
+ return ((u64)readl(reg + 0x4UL) << 32) | (u64)readl(reg);
+}
+
+static inline void writeq(u64 val, void __iomem *reg)
+{
+ writel(val & 0xffffffff, reg);
+ writel(val >> 32, reg + 0x4UL);
+}
+#endif
+
+enum vnic_dev_intr_mode {
+ VNIC_DEV_INTR_MODE_UNKNOWN,
+ VNIC_DEV_INTR_MODE_INTX,
+ VNIC_DEV_INTR_MODE_MSI,
+ VNIC_DEV_INTR_MODE_MSIX,
+};
+
+struct vnic_dev_bar {
+ void __iomem *vaddr;
+ dma_addr_t bus_addr;
+ unsigned long len;
+};
+
+struct vnic_dev_ring {
+ void *descs;
+ size_t size;
+ dma_addr_t base_addr;
+ size_t base_align;
+ void *descs_unaligned;
+ size_t size_unaligned;
+ dma_addr_t base_addr_unaligned;
+ unsigned int desc_size;
+ unsigned int desc_count;
+ unsigned int desc_avail;
+};
+
+struct vnic_dev;
+struct vnic_stats;
+
+void *vnic_dev_priv(struct vnic_dev *vdev);
+unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
+ enum vnic_res_type type);
+void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
+ unsigned int index);
+unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
+ unsigned int desc_count,
+ unsigned int desc_size);
+void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring);
+int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
+ unsigned int desc_count, unsigned int desc_size);
+void vnic_dev_free_desc_ring(struct vnic_dev *vdev,
+ struct vnic_dev_ring *ring);
+int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
+ u64 *a0, u64 *a1, int wait);
+int vnic_dev_fw_info(struct vnic_dev *vdev,
+ struct vnic_devcmd_fw_info **fw_info);
+int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset,
+ unsigned int size, void *value);
+int vnic_dev_stats_clear(struct vnic_dev *vdev);
+int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats);
+int vnic_dev_hang_notify(struct vnic_dev *vdev);
+void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
+ int broadcast, int promisc, int allmulti);
+void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr);
+void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr);
+int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr);
+int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr);
+void vnic_dev_notify_unset(struct vnic_dev *vdev);
+int vnic_dev_link_status(struct vnic_dev *vdev);
+u32 vnic_dev_port_speed(struct vnic_dev *vdev);
+u32 vnic_dev_msg_lvl(struct vnic_dev *vdev);
+u32 vnic_dev_mtu(struct vnic_dev *vdev);
+u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev);
+int vnic_dev_close(struct vnic_dev *vdev);
+int vnic_dev_enable(struct vnic_dev *vdev);
+int vnic_dev_disable(struct vnic_dev *vdev);
+int vnic_dev_open(struct vnic_dev *vdev, int arg);
+int vnic_dev_open_done(struct vnic_dev *vdev, int *done);
+int vnic_dev_init(struct vnic_dev *vdev, int arg);
+int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg);
+int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done);
+void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
+ enum vnic_dev_intr_mode intr_mode);
+enum vnic_dev_intr_mode vnic_dev_get_intr_mode(struct vnic_dev *vdev);
+void vnic_dev_unregister(struct vnic_dev *vdev);
+struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
+ void *priv, struct pci_dev *pdev,
+ struct vnic_dev_bar *bar);
+
+#endif /* _VNIC_DEV_H_ */
diff --git a/drivers/scsi/fnic/vnic_devcmd.h b/drivers/scsi/fnic/vnic_devcmd.h
new file mode 100644
index 0000000..d62b906
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_devcmd.h
@@ -0,0 +1,281 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_DEVCMD_H_
+#define _VNIC_DEVCMD_H_
+
+#define _CMD_NBITS 14
+#define _CMD_VTYPEBITS 10
+#define _CMD_FLAGSBITS 6
+#define _CMD_DIRBITS 2
+
+#define _CMD_NMASK ((1 << _CMD_NBITS)-1)
+#define _CMD_VTYPEMASK ((1 << _CMD_VTYPEBITS)-1)
+#define _CMD_FLAGSMASK ((1 << _CMD_FLAGSBITS)-1)
+#define _CMD_DIRMASK ((1 << _CMD_DIRBITS)-1)
+
+#define _CMD_NSHIFT 0
+#define _CMD_VTYPESHIFT (_CMD_NSHIFT+_CMD_NBITS)
+#define _CMD_FLAGSSHIFT (_CMD_VTYPESHIFT+_CMD_VTYPEBITS)
+#define _CMD_DIRSHIFT (_CMD_FLAGSSHIFT+_CMD_FLAGSBITS)
+
+/*
+ * Direction bits (from host perspective).
+ */
+#define _CMD_DIR_NONE 0U
+#define _CMD_DIR_WRITE 1U
+#define _CMD_DIR_READ 2U
+#define _CMD_DIR_RW (_CMD_DIR_WRITE | _CMD_DIR_READ)
+
+/*
+ * Flag bits.
+ */
+#define _CMD_FLAGS_NONE 0U
+#define _CMD_FLAGS_NOWAIT 1U
+
+/*
+ * vNIC type bits.
+ */
+#define _CMD_VTYPE_NONE 0U
+#define _CMD_VTYPE_ENET 1U
+#define _CMD_VTYPE_FC 2U
+#define _CMD_VTYPE_SCSI 4U
+#define _CMD_VTYPE_ALL (_CMD_VTYPE_ENET | _CMD_VTYPE_FC | _CMD_VTYPE_SCSI)
+
+/*
+ * Used to create cmds..
+*/
+#define _CMDCF(dir, flags, vtype, nr) \
+ (((dir) << _CMD_DIRSHIFT) | \
+ ((flags) << _CMD_FLAGSSHIFT) | \
+ ((vtype) << _CMD_VTYPESHIFT) | \
+ ((nr) << _CMD_NSHIFT))
+#define _CMDC(dir, vtype, nr) _CMDCF(dir, 0, vtype, nr)
+#define _CMDCNW(dir, vtype, nr) _CMDCF(dir, _CMD_FLAGS_NOWAIT, vtype, nr)
+
+/*
+ * Used to decode cmds..
+*/
+#define _CMD_DIR(cmd) (((cmd) >> _CMD_DIRSHIFT) & _CMD_DIRMASK)
+#define _CMD_FLAGS(cmd) (((cmd) >> _CMD_FLAGSSHIFT) & _CMD_FLAGSMASK)
+#define _CMD_VTYPE(cmd) (((cmd) >> _CMD_VTYPESHIFT) & _CMD_VTYPEMASK)
+#define _CMD_N(cmd) (((cmd) >> _CMD_NSHIFT) & _CMD_NMASK)
+
+enum vnic_devcmd_cmd {
+ CMD_NONE = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_NONE, 0),
+
+ /* mcpu fw info in mem: (u64)a0=paddr to struct vnic_devcmd_fw_info */
+ CMD_MCPU_FW_INFO = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 1),
+
+ /* dev-specific block member:
+ * in: (u16)a0=offset,(u8)a1=size
+ * out: a0=value */
+ CMD_DEV_SPEC = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 2),
+
+ /* stats clear */
+ CMD_STATS_CLEAR = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 3),
+
+ /* stats dump in mem: (u64)a0=paddr to stats area,
+ * (u16)a1=sizeof stats area */
+ CMD_STATS_DUMP = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 4),
+
+ /* set Rx packet filter: (u32)a0=filters (see CMD_PFILTER_*) */
+ CMD_PACKET_FILTER = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 7),
+
+ /* hang detection notification */
+ CMD_HANG_NOTIFY = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 8),
+
+ /* MAC address in (u48)a0 */
+ CMD_MAC_ADDR = _CMDC(_CMD_DIR_READ,
+ _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 9),
+
+ /* disable/enable promisc mode: (u8)a0=0/1 */
+/***** XXX DEPRECATED *****/
+ CMD_PROMISC_MODE = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 10),
+
+ /* disable/enable all-multi mode: (u8)a0=0/1 */
+/***** XXX DEPRECATED *****/
+ CMD_ALLMULTI_MODE = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 11),
+
+ /* add addr from (u48)a0 */
+ CMD_ADDR_ADD = _CMDCNW(_CMD_DIR_WRITE,
+ _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 12),
+
+ /* del addr from (u48)a0 */
+ CMD_ADDR_DEL = _CMDCNW(_CMD_DIR_WRITE,
+ _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 13),
+
+ /* add VLAN id in (u16)a0 */
+ CMD_VLAN_ADD = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 14),
+
+ /* del VLAN id in (u16)a0 */
+ CMD_VLAN_DEL = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 15),
+
+ /* nic_cfg in (u32)a0 */
+ CMD_NIC_CFG = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 16),
+
+ /* union vnic_rss_key in mem: (u64)a0=paddr, (u16)a1=len */
+ CMD_RSS_KEY = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 17),
+
+ /* union vnic_rss_cpu in mem: (u64)a0=paddr, (u16)a1=len */
+ CMD_RSS_CPU = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 18),
+
+ /* initiate softreset */
+ CMD_SOFT_RESET = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 19),
+
+ /* softreset status:
+ * out: a0=0 reset complete, a0=1 reset in progress */
+ CMD_SOFT_RESET_STATUS = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 20),
+
+ /* set struct vnic_devcmd_notify buffer in mem:
+ * in:
+ * (u64)a0=paddr to notify (set paddr=0 to unset)
+ * (u32)a1 & 0x00000000ffffffff=sizeof(struct vnic_devcmd_notify)
+ * (u16)a1 & 0x0000ffff00000000=intr num (-1 for no intr)
+ * out:
+ * (u32)a1 = effective size
+ */
+ CMD_NOTIFY = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 21),
+
+ /* UNDI API: (u64)a0=paddr to s_PXENV_UNDI_ struct,
+ * (u8)a1=PXENV_UNDI_xxx */
+ CMD_UNDI = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 22),
+
+ /* initiate open sequence (u32)a0=flags (see CMD_OPENF_*) */
+ CMD_OPEN = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 23),
+
+ /* open status:
+ * out: a0=0 open complete, a0=1 open in progress */
+ CMD_OPEN_STATUS = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 24),
+
+ /* close vnic */
+ CMD_CLOSE = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 25),
+
+ /* initialize virtual link: (u32)a0=flags (see CMD_INITF_*) */
+ CMD_INIT = _CMDCNW(_CMD_DIR_READ, _CMD_VTYPE_ALL, 26),
+
+ /* variant of CMD_INIT, with provisioning info
+ * (u64)a0=paddr of vnic_devcmd_provinfo
+ * (u32)a1=sizeof provision info */
+ CMD_INIT_PROV_INFO = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 27),
+
+ /* enable virtual link */
+ CMD_ENABLE = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 28),
+
+ /* disable virtual link */
+ CMD_DISABLE = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 29),
+
+ /* stats dump all vnics on uplink in mem: (u64)a0=paddr (u32)a1=uif */
+ CMD_STATS_DUMP_ALL = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 30),
+
+ /* init status:
+ * out: a0=0 init complete, a0=1 init in progress
+ * if a0=0, a1=errno */
+ CMD_INIT_STATUS = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 31),
+
+ /* INT13 API: (u64)a0=paddr to vnic_int13_params struct
+ * (u8)a1=INT13_CMD_xxx */
+ CMD_INT13 = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_FC, 32),
+
+ /* logical uplink enable/disable: (u64)a0: 0/1=disable/enable */
+ CMD_LOGICAL_UPLINK = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 33),
+
+ /* undo initialize of virtual link */
+ CMD_DEINIT = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 34),
+};
+
+/* flags for CMD_OPEN */
+#define CMD_OPENF_OPROM 0x1 /* open coming from option rom */
+
+/* flags for CMD_INIT */
+#define CMD_INITF_DEFAULT_MAC 0x1 /* init with default mac addr */
+
+/* flags for CMD_PACKET_FILTER */
+#define CMD_PFILTER_DIRECTED 0x01
+#define CMD_PFILTER_MULTICAST 0x02
+#define CMD_PFILTER_BROADCAST 0x04
+#define CMD_PFILTER_PROMISCUOUS 0x08
+#define CMD_PFILTER_ALL_MULTICAST 0x10
+
+enum vnic_devcmd_status {
+ STAT_NONE = 0,
+ STAT_BUSY = 1 << 0, /* cmd in progress */
+ STAT_ERROR = 1 << 1, /* last cmd caused error (code in a0) */
+};
+
+enum vnic_devcmd_error {
+ ERR_SUCCESS = 0,
+ ERR_EINVAL = 1,
+ ERR_EFAULT = 2,
+ ERR_EPERM = 3,
+ ERR_EBUSY = 4,
+ ERR_ECMDUNKNOWN = 5,
+ ERR_EBADSTATE = 6,
+ ERR_ENOMEM = 7,
+ ERR_ETIMEDOUT = 8,
+ ERR_ELINKDOWN = 9,
+};
+
+struct vnic_devcmd_fw_info {
+ char fw_version[32];
+ char fw_build[32];
+ char hw_version[32];
+ char hw_serial_number[32];
+};
+
+struct vnic_devcmd_notify {
+ u32 csum; /* checksum over following words */
+
+ u32 link_state; /* link up == 1 */
+ u32 port_speed; /* effective port speed (rate limit) */
+ u32 mtu; /* MTU */
+ u32 msglvl; /* requested driver msg lvl */
+ u32 uif; /* uplink interface */
+ u32 status; /* status bits (see VNIC_STF_*) */
+ u32 error; /* error code (see ERR_*) for first ERR */
+ u32 link_down_cnt; /* running count of link down transitions */
+};
+#define VNIC_STF_FATAL_ERR 0x0001 /* fatal fw error */
+
+struct vnic_devcmd_provinfo {
+ u8 oui[3];
+ u8 type;
+ u8 data[0];
+};
+
+/*
+ * Writing cmd register causes STAT_BUSY to get set in status register.
+ * When cmd completes, STAT_BUSY will be cleared.
+ *
+ * If cmd completed successfully STAT_ERROR will be clear
+ * and args registers contain cmd-specific results.
+ *
+ * If cmd error, STAT_ERROR will be set and args[0] contains error code.
+ *
+ * status register is read-only. While STAT_BUSY is set,
+ * all other register contents are read-only.
+ */
+
+/* Make sizeof(vnic_devcmd) a power-of-2 for I/O BAR. */
+#define VNIC_DEVCMD_NARGS 15
+struct vnic_devcmd {
+ u32 status; /* RO */
+ u32 cmd; /* RW */
+ u64 args[VNIC_DEVCMD_NARGS]; /* RW cmd args (little-endian) */
+};
+
+#endif /* _VNIC_DEVCMD_H_ */
diff --git a/drivers/scsi/fnic/vnic_intr.c b/drivers/scsi/fnic/vnic_intr.c
new file mode 100644
index 0000000..4f4dc87
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_intr.c
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include "vnic_dev.h"
+#include "vnic_intr.h"
+
+void vnic_intr_free(struct vnic_intr *intr)
+{
+ intr->ctrl = NULL;
+}
+
+int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
+ unsigned int index)
+{
+ intr->index = index;
+ intr->vdev = vdev;
+
+ intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
+ if (!intr->ctrl) {
+ printk(KERN_ERR "Failed to hook INTR[%d].ctrl resource\n",
+ index);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
+ unsigned int coalescing_type, unsigned int mask_on_assertion)
+{
+ iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer);
+ iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
+ iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
+ iowrite32(0, &intr->ctrl->int_credits);
+}
+
+void vnic_intr_clean(struct vnic_intr *intr)
+{
+ iowrite32(0, &intr->ctrl->int_credits);
+}
diff --git a/drivers/scsi/fnic/vnic_intr.h b/drivers/scsi/fnic/vnic_intr.h
new file mode 100644
index 0000000..d5fb40e
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_intr.h
@@ -0,0 +1,118 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_INTR_H_
+#define _VNIC_INTR_H_
+
+#include <linux/pci.h>
+#include "vnic_dev.h"
+
+/*
+ * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
+ * Driver) when both are built with CONFIG options =y
+ */
+#define vnic_intr_unmask fnic_intr_unmask
+#define vnic_intr_mask fnic_intr_mask
+#define vnic_intr_return_credits fnic_intr_return_credits
+#define vnic_intr_credits fnic_intr_credits
+#define vnic_intr_return_all_credits fnic_intr_return_all_credits
+#define vnic_intr_legacy_pba fnic_intr_legacy_pba
+#define vnic_intr_free fnic_intr_free
+#define vnic_intr_alloc fnic_intr_alloc
+#define vnic_intr_init fnic_intr_init
+#define vnic_intr_clean fnic_intr_clean
+
+#define VNIC_INTR_TIMER_MAX 0xffff
+
+#define VNIC_INTR_TIMER_TYPE_ABS 0
+#define VNIC_INTR_TIMER_TYPE_QUIET 1
+
+/* Interrupt control */
+struct vnic_intr_ctrl {
+ u32 coalescing_timer; /* 0x00 */
+ u32 pad0;
+ u32 coalescing_value; /* 0x08 */
+ u32 pad1;
+ u32 coalescing_type; /* 0x10 */
+ u32 pad2;
+ u32 mask_on_assertion; /* 0x18 */
+ u32 pad3;
+ u32 mask; /* 0x20 */
+ u32 pad4;
+ u32 int_credits; /* 0x28 */
+ u32 pad5;
+ u32 int_credit_return; /* 0x30 */
+ u32 pad6;
+};
+
+struct vnic_intr {
+ unsigned int index;
+ struct vnic_dev *vdev;
+ struct vnic_intr_ctrl __iomem *ctrl; /* memory-mapped */
+};
+
+static inline void vnic_intr_unmask(struct vnic_intr *intr)
+{
+ iowrite32(0, &intr->ctrl->mask);
+}
+
+static inline void vnic_intr_mask(struct vnic_intr *intr)
+{
+ iowrite32(1, &intr->ctrl->mask);
+}
+
+static inline void vnic_intr_return_credits(struct vnic_intr *intr,
+ unsigned int credits, int unmask, int reset_timer)
+{
+#define VNIC_INTR_UNMASK_SHIFT 16
+#define VNIC_INTR_RESET_TIMER_SHIFT 17
+
+ u32 int_credit_return = (credits & 0xffff) |
+ (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) |
+ (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0);
+
+ iowrite32(int_credit_return, &intr->ctrl->int_credit_return);
+}
+
+static inline unsigned int vnic_intr_credits(struct vnic_intr *intr)
+{
+ return ioread32(&intr->ctrl->int_credits);
+}
+
+static inline void vnic_intr_return_all_credits(struct vnic_intr *intr)
+{
+ unsigned int credits = vnic_intr_credits(intr);
+ int unmask = 1;
+ int reset_timer = 1;
+
+ vnic_intr_return_credits(intr, credits, unmask, reset_timer);
+}
+
+static inline u32 vnic_intr_legacy_pba(u32 __iomem *legacy_pba)
+{
+ /* read PBA without clearing */
+ return ioread32(legacy_pba);
+}
+
+void vnic_intr_free(struct vnic_intr *intr);
+int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
+ unsigned int index);
+void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
+ unsigned int coalescing_type, unsigned int mask_on_assertion);
+void vnic_intr_clean(struct vnic_intr *intr);
+
+#endif /* _VNIC_INTR_H_ */
diff --git a/drivers/scsi/fnic/vnic_nic.h b/drivers/scsi/fnic/vnic_nic.h
new file mode 100644
index 0000000..f15b83e
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_nic.h
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_NIC_H_
+#define _VNIC_NIC_H_
+
+/*
+ * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
+ * Driver) when both are built with CONFIG options =y
+ */
+#define vnic_set_nic_cfg fnic_set_nic_cfg
+
+#define NIC_CFG_RSS_DEFAULT_CPU_MASK_FIELD 0xffUL
+#define NIC_CFG_RSS_DEFAULT_CPU_SHIFT 0
+#define NIC_CFG_RSS_HASH_TYPE (0xffUL << 8)
+#define NIC_CFG_RSS_HASH_TYPE_MASK_FIELD 0xffUL
+#define NIC_CFG_RSS_HASH_TYPE_SHIFT 8
+#define NIC_CFG_RSS_HASH_BITS (7UL << 16)
+#define NIC_CFG_RSS_HASH_BITS_MASK_FIELD 7UL
+#define NIC_CFG_RSS_HASH_BITS_SHIFT 16
+#define NIC_CFG_RSS_BASE_CPU (7UL << 19)
+#define NIC_CFG_RSS_BASE_CPU_MASK_FIELD 7UL
+#define NIC_CFG_RSS_BASE_CPU_SHIFT 19
+#define NIC_CFG_RSS_ENABLE (1UL << 22)
+#define NIC_CFG_RSS_ENABLE_MASK_FIELD 1UL
+#define NIC_CFG_RSS_ENABLE_SHIFT 22
+#define NIC_CFG_TSO_IPID_SPLIT_EN (1UL << 23)
+#define NIC_CFG_TSO_IPID_SPLIT_EN_MASK_FIELD 1UL
+#define NIC_CFG_TSO_IPID_SPLIT_EN_SHIFT 23
+#define NIC_CFG_IG_VLAN_STRIP_EN (1UL << 24)
+#define NIC_CFG_IG_VLAN_STRIP_EN_MASK_FIELD 1UL
+#define NIC_CFG_IG_VLAN_STRIP_EN_SHIFT 24
+
+static inline void vnic_set_nic_cfg(u32 *nic_cfg,
+ u8 rss_default_cpu, u8 rss_hash_type,
+ u8 rss_hash_bits, u8 rss_base_cpu,
+ u8 rss_enable, u8 tso_ipid_split_en,
+ u8 ig_vlan_strip_en)
+{
+ *nic_cfg = (rss_default_cpu & NIC_CFG_RSS_DEFAULT_CPU_MASK_FIELD) |
+ ((rss_hash_type & NIC_CFG_RSS_HASH_TYPE_MASK_FIELD)
+ << NIC_CFG_RSS_HASH_TYPE_SHIFT) |
+ ((rss_hash_bits & NIC_CFG_RSS_HASH_BITS_MASK_FIELD)
+ << NIC_CFG_RSS_HASH_BITS_SHIFT) |
+ ((rss_base_cpu & NIC_CFG_RSS_BASE_CPU_MASK_FIELD)
+ << NIC_CFG_RSS_BASE_CPU_SHIFT) |
+ ((rss_enable & NIC_CFG_RSS_ENABLE_MASK_FIELD)
+ << NIC_CFG_RSS_ENABLE_SHIFT) |
+ ((tso_ipid_split_en & NIC_CFG_TSO_IPID_SPLIT_EN_MASK_FIELD)
+ << NIC_CFG_TSO_IPID_SPLIT_EN_SHIFT) |
+ ((ig_vlan_strip_en & NIC_CFG_IG_VLAN_STRIP_EN_MASK_FIELD)
+ << NIC_CFG_IG_VLAN_STRIP_EN_SHIFT);
+}
+
+#endif /* _VNIC_NIC_H_ */
diff --git a/drivers/scsi/fnic/vnic_resource.h b/drivers/scsi/fnic/vnic_resource.h
new file mode 100644
index 0000000..2d842f7
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_resource.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_RESOURCE_H_
+#define _VNIC_RESOURCE_H_
+
+#define VNIC_RES_MAGIC 0x766E6963L /* 'vnic' */
+#define VNIC_RES_VERSION 0x00000000L
+
+/* vNIC resource types */
+enum vnic_res_type {
+ RES_TYPE_EOL, /* End-of-list */
+ RES_TYPE_WQ, /* Work queues */
+ RES_TYPE_RQ, /* Receive queues */
+ RES_TYPE_CQ, /* Completion queues */
+ RES_TYPE_RSVD1,
+ RES_TYPE_NIC_CFG, /* Enet NIC config registers */
+ RES_TYPE_RSVD2,
+ RES_TYPE_RSVD3,
+ RES_TYPE_RSVD4,
+ RES_TYPE_RSVD5,
+ RES_TYPE_INTR_CTRL, /* Interrupt ctrl table */
+ RES_TYPE_INTR_TABLE, /* MSI/MSI-X Interrupt table */
+ RES_TYPE_INTR_PBA, /* MSI/MSI-X PBA table */
+ RES_TYPE_INTR_PBA_LEGACY, /* Legacy intr status */
+ RES_TYPE_RSVD6,
+ RES_TYPE_RSVD7,
+ RES_TYPE_DEVCMD, /* Device command region */
+ RES_TYPE_PASS_THRU_PAGE, /* Pass-thru page */
+
+ RES_TYPE_MAX, /* Count of resource types */
+};
+
+struct vnic_resource_header {
+ u32 magic;
+ u32 version;
+};
+
+struct vnic_resource {
+ u8 type;
+ u8 bar;
+ u8 pad[2];
+ u32 bar_offset;
+ u32 count;
+};
+
+#endif /* _VNIC_RESOURCE_H_ */
diff --git a/drivers/scsi/fnic/vnic_rq.c b/drivers/scsi/fnic/vnic_rq.c
new file mode 100644
index 0000000..45e5cd6
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_rq.c
@@ -0,0 +1,197 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include "vnic_dev.h"
+#include "vnic_rq.h"
+
+static int vnic_rq_alloc_bufs(struct vnic_rq *rq)
+{
+ struct vnic_rq_buf *buf;
+ struct vnic_dev *vdev;
+ unsigned int i, j, count = rq->ring.desc_count;
+ unsigned int blks = VNIC_RQ_BUF_BLKS_NEEDED(count);
+
+ vdev = rq->vdev;
+
+ for (i = 0; i < blks; i++) {
+ rq->bufs[i] = kzalloc(VNIC_RQ_BUF_BLK_SZ, GFP_ATOMIC);
+ if (!rq->bufs[i]) {
+ printk(KERN_ERR "Failed to alloc rq_bufs\n");
+ return -ENOMEM;
+ }
+ }
+
+ for (i = 0; i < blks; i++) {
+ buf = rq->bufs[i];
+ for (j = 0; j < VNIC_RQ_BUF_BLK_ENTRIES; j++) {
+ buf->index = i * VNIC_RQ_BUF_BLK_ENTRIES + j;
+ buf->desc = (u8 *)rq->ring.descs +
+ rq->ring.desc_size * buf->index;
+ if (buf->index + 1 == count) {
+ buf->next = rq->bufs[0];
+ break;
+ } else if (j + 1 == VNIC_RQ_BUF_BLK_ENTRIES) {
+ buf->next = rq->bufs[i + 1];
+ } else {
+ buf->next = buf + 1;
+ buf++;
+ }
+ }
+ }
+
+ rq->to_use = rq->to_clean = rq->bufs[0];
+ rq->buf_index = 0;
+
+ return 0;
+}
+
+void vnic_rq_free(struct vnic_rq *rq)
+{
+ struct vnic_dev *vdev;
+ unsigned int i;
+
+ vdev = rq->vdev;
+
+ vnic_dev_free_desc_ring(vdev, &rq->ring);
+
+ for (i = 0; i < VNIC_RQ_BUF_BLKS_MAX; i++) {
+ kfree(rq->bufs[i]);
+ rq->bufs[i] = NULL;
+ }
+
+ rq->ctrl = NULL;
+}
+
+int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
+ unsigned int desc_count, unsigned int desc_size)
+{
+ int err;
+
+ rq->index = index;
+ rq->vdev = vdev;
+
+ rq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_RQ, index);
+ if (!rq->ctrl) {
+ printk(KERN_ERR "Failed to hook RQ[%d] resource\n", index);
+ return -EINVAL;
+ }
+
+ vnic_rq_disable(rq);
+
+ err = vnic_dev_alloc_desc_ring(vdev, &rq->ring, desc_count, desc_size);
+ if (err)
+ return err;
+
+ err = vnic_rq_alloc_bufs(rq);
+ if (err) {
+ vnic_rq_free(rq);
+ return err;
+ }
+
+ return 0;
+}
+
+void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
+ unsigned int error_interrupt_enable,
+ unsigned int error_interrupt_offset)
+{
+ u64 paddr;
+ u32 fetch_index;
+
+ paddr = (u64)rq->ring.base_addr | VNIC_PADDR_TARGET;
+ writeq(paddr, &rq->ctrl->ring_base);
+ iowrite32(rq->ring.desc_count, &rq->ctrl->ring_size);
+ iowrite32(cq_index, &rq->ctrl->cq_index);
+ iowrite32(error_interrupt_enable, &rq->ctrl->error_interrupt_enable);
+ iowrite32(error_interrupt_offset, &rq->ctrl->error_interrupt_offset);
+ iowrite32(0, &rq->ctrl->dropped_packet_count);
+ iowrite32(0, &rq->ctrl->error_status);
+
+ /* Use current fetch_index as the ring starting point */
+ fetch_index = ioread32(&rq->ctrl->fetch_index);
+ rq->to_use = rq->to_clean =
+ &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES]
+ [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES];
+ iowrite32(fetch_index, &rq->ctrl->posted_index);
+
+ rq->buf_index = 0;
+}
+
+unsigned int vnic_rq_error_status(struct vnic_rq *rq)
+{
+ return ioread32(&rq->ctrl->error_status);
+}
+
+void vnic_rq_enable(struct vnic_rq *rq)
+{
+ iowrite32(1, &rq->ctrl->enable);
+}
+
+int vnic_rq_disable(struct vnic_rq *rq)
+{
+ unsigned int wait;
+
+ iowrite32(0, &rq->ctrl->enable);
+
+ /* Wait for HW to ACK disable request */
+ for (wait = 0; wait < 100; wait++) {
+ if (!(ioread32(&rq->ctrl->running)))
+ return 0;
+ udelay(1);
+ }
+
+ printk(KERN_ERR "Failed to disable RQ[%d]\n", rq->index);
+
+ return -ETIMEDOUT;
+}
+
+void vnic_rq_clean(struct vnic_rq *rq,
+ void (*buf_clean)(struct vnic_rq *rq, struct vnic_rq_buf *buf))
+{
+ struct vnic_rq_buf *buf;
+ u32 fetch_index;
+
+ BUG_ON(ioread32(&rq->ctrl->enable));
+
+ buf = rq->to_clean;
+
+ while (vnic_rq_desc_used(rq) > 0) {
+
+ (*buf_clean)(rq, buf);
+
+ buf = rq->to_clean = buf->next;
+ rq->ring.desc_avail++;
+ }
+
+ /* Use current fetch_index as the ring starting point */
+ fetch_index = ioread32(&rq->ctrl->fetch_index);
+ rq->to_use = rq->to_clean =
+ &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES]
+ [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES];
+ iowrite32(fetch_index, &rq->ctrl->posted_index);
+
+ rq->buf_index = 0;
+
+ vnic_dev_clear_desc_ring(&rq->ring);
+}
+
diff --git a/drivers/scsi/fnic/vnic_rq.h b/drivers/scsi/fnic/vnic_rq.h
new file mode 100644
index 0000000..aebdfbd
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_rq.h
@@ -0,0 +1,235 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_RQ_H_
+#define _VNIC_RQ_H_
+
+#include <linux/pci.h>
+#include "vnic_dev.h"
+#include "vnic_cq.h"
+
+/*
+ * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
+ * Driver) when both are built with CONFIG options =y
+ */
+#define vnic_rq_desc_avail fnic_rq_desc_avail
+#define vnic_rq_desc_used fnic_rq_desc_used
+#define vnic_rq_next_desc fnic_rq_next_desc
+#define vnic_rq_next_index fnic_rq_next_index
+#define vnic_rq_next_buf_index fnic_rq_next_buf_index
+#define vnic_rq_post fnic_rq_post
+#define vnic_rq_posting_soon fnic_rq_posting_soon
+#define vnic_rq_return_descs fnic_rq_return_descs
+#define vnic_rq_service fnic_rq_service
+#define vnic_rq_fill fnic_rq_fill
+#define vnic_rq_free fnic_rq_free
+#define vnic_rq_alloc fnic_rq_alloc
+#define vnic_rq_init fnic_rq_init
+#define vnic_rq_error_status fnic_rq_error_status
+#define vnic_rq_enable fnic_rq_enable
+#define vnic_rq_disable fnic_rq_disable
+#define vnic_rq_clean fnic_rq_clean
+
+/* Receive queue control */
+struct vnic_rq_ctrl {
+ u64 ring_base; /* 0x00 */
+ u32 ring_size; /* 0x08 */
+ u32 pad0;
+ u32 posted_index; /* 0x10 */
+ u32 pad1;
+ u32 cq_index; /* 0x18 */
+ u32 pad2;
+ u32 enable; /* 0x20 */
+ u32 pad3;
+ u32 running; /* 0x28 */
+ u32 pad4;
+ u32 fetch_index; /* 0x30 */
+ u32 pad5;
+ u32 error_interrupt_enable; /* 0x38 */
+ u32 pad6;
+ u32 error_interrupt_offset; /* 0x40 */
+ u32 pad7;
+ u32 error_status; /* 0x48 */
+ u32 pad8;
+ u32 dropped_packet_count; /* 0x50 */
+ u32 pad9;
+ u32 dropped_packet_count_rc; /* 0x58 */
+ u32 pad10;
+};
+
+/* Break the vnic_rq_buf allocations into blocks of 64 entries */
+#define VNIC_RQ_BUF_BLK_ENTRIES 64
+#define VNIC_RQ_BUF_BLK_SZ \
+ (VNIC_RQ_BUF_BLK_ENTRIES * sizeof(struct vnic_rq_buf))
+#define VNIC_RQ_BUF_BLKS_NEEDED(entries) \
+ DIV_ROUND_UP(entries, VNIC_RQ_BUF_BLK_ENTRIES)
+#define VNIC_RQ_BUF_BLKS_MAX VNIC_RQ_BUF_BLKS_NEEDED(4096)
+
+struct vnic_rq_buf {
+ struct vnic_rq_buf *next;
+ dma_addr_t dma_addr;
+ void *os_buf;
+ unsigned int os_buf_index;
+ unsigned int len;
+ unsigned int index;
+ void *desc;
+};
+
+struct vnic_rq {
+ unsigned int index;
+ struct vnic_dev *vdev;
+ struct vnic_rq_ctrl __iomem *ctrl; /* memory-mapped */
+ struct vnic_dev_ring ring;
+ struct vnic_rq_buf *bufs[VNIC_RQ_BUF_BLKS_MAX];
+ struct vnic_rq_buf *to_use;
+ struct vnic_rq_buf *to_clean;
+ void *os_buf_head;
+ unsigned int buf_index;
+ unsigned int pkts_outstanding;
+};
+
+static inline unsigned int vnic_rq_desc_avail(struct vnic_rq *rq)
+{
+ /* how many does SW own? */
+ return rq->ring.desc_avail;
+}
+
+static inline unsigned int vnic_rq_desc_used(struct vnic_rq *rq)
+{
+ /* how many does HW own? */
+ return rq->ring.desc_count - rq->ring.desc_avail - 1;
+}
+
+static inline void *vnic_rq_next_desc(struct vnic_rq *rq)
+{
+ return rq->to_use->desc;
+}
+
+static inline unsigned int vnic_rq_next_index(struct vnic_rq *rq)
+{
+ return rq->to_use->index;
+}
+
+static inline unsigned int vnic_rq_next_buf_index(struct vnic_rq *rq)
+{
+ return rq->buf_index++;
+}
+
+static inline void vnic_rq_post(struct vnic_rq *rq,
+ void *os_buf, unsigned int os_buf_index,
+ dma_addr_t dma_addr, unsigned int len)
+{
+ struct vnic_rq_buf *buf = rq->to_use;
+
+ buf->os_buf = os_buf;
+ buf->os_buf_index = os_buf_index;
+ buf->dma_addr = dma_addr;
+ buf->len = len;
+
+ buf = buf->next;
+ rq->to_use = buf;
+ rq->ring.desc_avail--;
+
+ /* Move the posted_index every nth descriptor
+ */
+
+#ifndef VNIC_RQ_RETURN_RATE
+#define VNIC_RQ_RETURN_RATE 0xf /* keep 2^n - 1 */
+#endif
+
+ if ((buf->index & VNIC_RQ_RETURN_RATE) == 0) {
+ /* Adding write memory barrier prevents compiler and/or CPU
+ * reordering, thus avoiding descriptor posting before
+ * descriptor is initialized. Otherwise, hardware can read
+ * stale descriptor fields.
+ */
+ wmb();
+ iowrite32(buf->index, &rq->ctrl->posted_index);
+ }
+}
+
+static inline int vnic_rq_posting_soon(struct vnic_rq *rq)
+{
+ return (rq->to_use->index & VNIC_RQ_RETURN_RATE) == 0;
+}
+
+static inline void vnic_rq_return_descs(struct vnic_rq *rq, unsigned int count)
+{
+ rq->ring.desc_avail += count;
+}
+
+enum desc_return_options {
+ VNIC_RQ_RETURN_DESC,
+ VNIC_RQ_DEFER_RETURN_DESC,
+};
+
+static inline void vnic_rq_service(struct vnic_rq *rq,
+ struct cq_desc *cq_desc, u16 completed_index,
+ int desc_return, void (*buf_service)(struct vnic_rq *rq,
+ struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
+ int skipped, void *opaque), void *opaque)
+{
+ struct vnic_rq_buf *buf;
+ int skipped;
+
+ buf = rq->to_clean;
+ while (1) {
+
+ skipped = (buf->index != completed_index);
+
+ (*buf_service)(rq, cq_desc, buf, skipped, opaque);
+
+ if (desc_return == VNIC_RQ_RETURN_DESC)
+ rq->ring.desc_avail++;
+
+ rq->to_clean = buf->next;
+
+ if (!skipped)
+ break;
+
+ buf = rq->to_clean;
+ }
+}
+
+static inline int vnic_rq_fill(struct vnic_rq *rq,
+ int (*buf_fill)(struct vnic_rq *rq))
+{
+ int err;
+
+ while (vnic_rq_desc_avail(rq) > 1) {
+
+ err = (*buf_fill)(rq);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+void vnic_rq_free(struct vnic_rq *rq);
+int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
+ unsigned int desc_count, unsigned int desc_size);
+void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
+ unsigned int error_interrupt_enable,
+ unsigned int error_interrupt_offset);
+unsigned int vnic_rq_error_status(struct vnic_rq *rq);
+void vnic_rq_enable(struct vnic_rq *rq);
+int vnic_rq_disable(struct vnic_rq *rq);
+void vnic_rq_clean(struct vnic_rq *rq,
+ void (*buf_clean)(struct vnic_rq *rq, struct vnic_rq_buf *buf));
+
+#endif /* _VNIC_RQ_H_ */
diff --git a/drivers/scsi/fnic/vnic_scsi.h b/drivers/scsi/fnic/vnic_scsi.h
new file mode 100644
index 0000000..d5a853d
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_scsi.h
@@ -0,0 +1,99 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_SCSI_H_
+#define _VNIC_SCSI_H_
+
+#define VNIC_FNIC_WQ_COPY_COUNT_MIN 1
+#define VNIC_FNIC_WQ_COPY_COUNT_MAX 1
+
+#define VNIC_FNIC_WQ_DESCS_MIN 64
+#define VNIC_FNIC_WQ_DESCS_MAX 128
+
+#define VNIC_FNIC_WQ_COPY_DESCS_MIN 64
+#define VNIC_FNIC_WQ_COPY_DESCS_MAX 512
+
+#define VNIC_FNIC_RQ_DESCS_MIN 64
+#define VNIC_FNIC_RQ_DESCS_MAX 128
+
+#define VNIC_FNIC_EDTOV_MIN 1000
+#define VNIC_FNIC_EDTOV_MAX 255000
+#define VNIC_FNIC_EDTOV_DEF 2000
+
+#define VNIC_FNIC_RATOV_MIN 1000
+#define VNIC_FNIC_RATOV_MAX 255000
+
+#define VNIC_FNIC_MAXDATAFIELDSIZE_MIN 256
+#define VNIC_FNIC_MAXDATAFIELDSIZE_MAX 2112
+
+#define VNIC_FNIC_FLOGI_RETRIES_MIN 0
+#define VNIC_FNIC_FLOGI_RETRIES_MAX 0xffffffff
+#define VNIC_FNIC_FLOGI_RETRIES_DEF 0xffffffff
+
+#define VNIC_FNIC_FLOGI_TIMEOUT_MIN 1000
+#define VNIC_FNIC_FLOGI_TIMEOUT_MAX 255000
+
+#define VNIC_FNIC_PLOGI_RETRIES_MIN 0
+#define VNIC_FNIC_PLOGI_RETRIES_MAX 255
+#define VNIC_FNIC_PLOGI_RETRIES_DEF 8
+
+#define VNIC_FNIC_PLOGI_TIMEOUT_MIN 1000
+#define VNIC_FNIC_PLOGI_TIMEOUT_MAX 255000
+
+#define VNIC_FNIC_IO_THROTTLE_COUNT_MIN 256
+#define VNIC_FNIC_IO_THROTTLE_COUNT_MAX 4096
+
+#define VNIC_FNIC_LINK_DOWN_TIMEOUT_MIN 0
+#define VNIC_FNIC_LINK_DOWN_TIMEOUT_MAX 240000
+
+#define VNIC_FNIC_PORT_DOWN_TIMEOUT_MIN 0
+#define VNIC_FNIC_PORT_DOWN_TIMEOUT_MAX 240000
+
+#define VNIC_FNIC_PORT_DOWN_IO_RETRIES_MIN 0
+#define VNIC_FNIC_PORT_DOWN_IO_RETRIES_MAX 255
+
+#define VNIC_FNIC_LUNS_PER_TARGET_MIN 1
+#define VNIC_FNIC_LUNS_PER_TARGET_MAX 1024
+
+/* Device-specific region: scsi configuration */
+struct vnic_scsi_config {
+ u64 node_wwn;
+ u64 port_wwn;
+ u32 flags;
+ u32 wq_enet_desc_count;
+ u32 wq_copy_desc_count;
+ u32 rq_desc_count;
+ u32 flogi_retries;
+ u32 flogi_timeout;
+ u32 plogi_retries;
+ u32 plogi_timeout;
+ u32 io_throttle_count;
+ u32 link_down_timeout;
+ u32 port_down_timeout;
+ u32 port_down_io_retries;
+ u32 luns_per_tgt;
+ u16 maxdatafieldsize;
+ u16 ed_tov;
+ u16 ra_tov;
+ u16 intr_timer;
+ u8 intr_timer_type;
+};
+
+#define VFCF_FCP_SEQ_LVL_ERR 0x1 /* Enable FCP-2 Error Recovery */
+#define VFCF_PERBI 0x2 /* persistent binding info available */
+
+#endif /* _VNIC_SCSI_H_ */
diff --git a/drivers/scsi/fnic/vnic_stats.h b/drivers/scsi/fnic/vnic_stats.h
new file mode 100644
index 0000000..5372e23
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_stats.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_STATS_H_
+#define _VNIC_STATS_H_
+
+/* Tx statistics */
+struct vnic_tx_stats {
+ u64 tx_frames_ok;
+ u64 tx_unicast_frames_ok;
+ u64 tx_multicast_frames_ok;
+ u64 tx_broadcast_frames_ok;
+ u64 tx_bytes_ok;
+ u64 tx_unicast_bytes_ok;
+ u64 tx_multicast_bytes_ok;
+ u64 tx_broadcast_bytes_ok;
+ u64 tx_drops;
+ u64 tx_errors;
+ u64 tx_tso;
+ u64 rsvd[16];
+};
+
+/* Rx statistics */
+struct vnic_rx_stats {
+ u64 rx_frames_ok;
+ u64 rx_frames_total;
+ u64 rx_unicast_frames_ok;
+ u64 rx_multicast_frames_ok;
+ u64 rx_broadcast_frames_ok;
+ u64 rx_bytes_ok;
+ u64 rx_unicast_bytes_ok;
+ u64 rx_multicast_bytes_ok;
+ u64 rx_broadcast_bytes_ok;
+ u64 rx_drop;
+ u64 rx_no_bufs;
+ u64 rx_errors;
+ u64 rx_rss;
+ u64 rx_crc_errors;
+ u64 rx_frames_64;
+ u64 rx_frames_127;
+ u64 rx_frames_255;
+ u64 rx_frames_511;
+ u64 rx_frames_1023;
+ u64 rx_frames_1518;
+ u64 rx_frames_to_max;
+ u64 rsvd[16];
+};
+
+struct vnic_stats {
+ struct vnic_tx_stats tx;
+ struct vnic_rx_stats rx;
+};
+
+#endif /* _VNIC_STATS_H_ */
diff --git a/drivers/scsi/fnic/vnic_wq.c b/drivers/scsi/fnic/vnic_wq.c
new file mode 100644
index 0000000..6e823b8
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_wq.c
@@ -0,0 +1,183 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include "vnic_dev.h"
+#include "vnic_wq.h"
+
+static int vnic_wq_alloc_bufs(struct vnic_wq *wq)
+{
+ struct vnic_wq_buf *buf;
+ struct vnic_dev *vdev;
+ unsigned int i, j, count = wq->ring.desc_count;
+ unsigned int blks = VNIC_WQ_BUF_BLKS_NEEDED(count);
+
+ vdev = wq->vdev;
+
+ for (i = 0; i < blks; i++) {
+ wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ, GFP_ATOMIC);
+ if (!wq->bufs[i]) {
+ printk(KERN_ERR "Failed to alloc wq_bufs\n");
+ return -ENOMEM;
+ }
+ }
+
+ for (i = 0; i < blks; i++) {
+ buf = wq->bufs[i];
+ for (j = 0; j < VNIC_WQ_BUF_BLK_ENTRIES; j++) {
+ buf->index = i * VNIC_WQ_BUF_BLK_ENTRIES + j;
+ buf->desc = (u8 *)wq->ring.descs +
+ wq->ring.desc_size * buf->index;
+ if (buf->index + 1 == count) {
+ buf->next = wq->bufs[0];
+ break;
+ } else if (j + 1 == VNIC_WQ_BUF_BLK_ENTRIES) {
+ buf->next = wq->bufs[i + 1];
+ } else {
+ buf->next = buf + 1;
+ buf++;
+ }
+ }
+ }
+
+ wq->to_use = wq->to_clean = wq->bufs[0];
+
+ return 0;
+}
+
+void vnic_wq_free(struct vnic_wq *wq)
+{
+ struct vnic_dev *vdev;
+ unsigned int i;
+
+ vdev = wq->vdev;
+
+ vnic_dev_free_desc_ring(vdev, &wq->ring);
+
+ for (i = 0; i < VNIC_WQ_BUF_BLKS_MAX; i++) {
+ kfree(wq->bufs[i]);
+ wq->bufs[i] = NULL;
+ }
+
+ wq->ctrl = NULL;
+
+}
+
+int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
+ unsigned int desc_count, unsigned int desc_size)
+{
+ int err;
+
+ wq->index = index;
+ wq->vdev = vdev;
+
+ wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_WQ, index);
+ if (!wq->ctrl) {
+ printk(KERN_ERR "Failed to hook WQ[%d] resource\n", index);
+ return -EINVAL;
+ }
+
+ vnic_wq_disable(wq);
+
+ err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size);
+ if (err)
+ return err;
+
+ err = vnic_wq_alloc_bufs(wq);
+ if (err) {
+ vnic_wq_free(wq);
+ return err;
+ }
+
+ return 0;
+}
+
+void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
+ unsigned int error_interrupt_enable,
+ unsigned int error_interrupt_offset)
+{
+ u64 paddr;
+
+ paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
+ writeq(paddr, &wq->ctrl->ring_base);
+ iowrite32(wq->ring.desc_count, &wq->ctrl->ring_size);
+ iowrite32(0, &wq->ctrl->fetch_index);
+ iowrite32(0, &wq->ctrl->posted_index);
+ iowrite32(cq_index, &wq->ctrl->cq_index);
+ iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);
+ iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
+ iowrite32(0, &wq->ctrl->error_status);
+}
+
+unsigned int vnic_wq_error_status(struct vnic_wq *wq)
+{
+ return ioread32(&wq->ctrl->error_status);
+}
+
+void vnic_wq_enable(struct vnic_wq *wq)
+{
+ iowrite32(1, &wq->ctrl->enable);
+}
+
+int vnic_wq_disable(struct vnic_wq *wq)
+{
+ unsigned int wait;
+
+ iowrite32(0, &wq->ctrl->enable);
+
+ /* Wait for HW to ACK disable request */
+ for (wait = 0; wait < 100; wait++) {
+ if (!(ioread32(&wq->ctrl->running)))
+ return 0;
+ udelay(1);
+ }
+
+ printk(KERN_ERR "Failed to disable WQ[%d]\n", wq->index);
+
+ return -ETIMEDOUT;
+}
+
+void vnic_wq_clean(struct vnic_wq *wq,
+ void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf))
+{
+ struct vnic_wq_buf *buf;
+
+ BUG_ON(ioread32(&wq->ctrl->enable));
+
+ buf = wq->to_clean;
+
+ while (vnic_wq_desc_used(wq) > 0) {
+
+ (*buf_clean)(wq, buf);
+
+ buf = wq->to_clean = buf->next;
+ wq->ring.desc_avail++;
+ }
+
+ wq->to_use = wq->to_clean = wq->bufs[0];
+
+ iowrite32(0, &wq->ctrl->fetch_index);
+ iowrite32(0, &wq->ctrl->posted_index);
+ iowrite32(0, &wq->ctrl->error_status);
+
+ vnic_dev_clear_desc_ring(&wq->ring);
+}
diff --git a/drivers/scsi/fnic/vnic_wq.h b/drivers/scsi/fnic/vnic_wq.h
new file mode 100644
index 0000000..5cd094f
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_wq.h
@@ -0,0 +1,175 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_WQ_H_
+#define _VNIC_WQ_H_
+
+#include <linux/pci.h>
+#include "vnic_dev.h"
+#include "vnic_cq.h"
+
+/*
+ * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
+ * Driver) when both are built with CONFIG options =y
+ */
+#define vnic_wq_desc_avail fnic_wq_desc_avail
+#define vnic_wq_desc_used fnic_wq_desc_used
+#define vnic_wq_next_desc fni_cwq_next_desc
+#define vnic_wq_post fnic_wq_post
+#define vnic_wq_service fnic_wq_service
+#define vnic_wq_free fnic_wq_free
+#define vnic_wq_alloc fnic_wq_alloc
+#define vnic_wq_init fnic_wq_init
+#define vnic_wq_error_status fnic_wq_error_status
+#define vnic_wq_enable fnic_wq_enable
+#define vnic_wq_disable fnic_wq_disable
+#define vnic_wq_clean fnic_wq_clean
+
+/* Work queue control */
+struct vnic_wq_ctrl {
+ u64 ring_base; /* 0x00 */
+ u32 ring_size; /* 0x08 */
+ u32 pad0;
+ u32 posted_index; /* 0x10 */
+ u32 pad1;
+ u32 cq_index; /* 0x18 */
+ u32 pad2;
+ u32 enable; /* 0x20 */
+ u32 pad3;
+ u32 running; /* 0x28 */
+ u32 pad4;
+ u32 fetch_index; /* 0x30 */
+ u32 pad5;
+ u32 dca_value; /* 0x38 */
+ u32 pad6;
+ u32 error_interrupt_enable; /* 0x40 */
+ u32 pad7;
+ u32 error_interrupt_offset; /* 0x48 */
+ u32 pad8;
+ u32 error_status; /* 0x50 */
+ u32 pad9;
+};
+
+struct vnic_wq_buf {
+ struct vnic_wq_buf *next;
+ dma_addr_t dma_addr;
+ void *os_buf;
+ unsigned int len;
+ unsigned int index;
+ int sop;
+ void *desc;
+};
+
+/* Break the vnic_wq_buf allocations into blocks of 64 entries */
+#define VNIC_WQ_BUF_BLK_ENTRIES 64
+#define VNIC_WQ_BUF_BLK_SZ \
+ (VNIC_WQ_BUF_BLK_ENTRIES * sizeof(struct vnic_wq_buf))
+#define VNIC_WQ_BUF_BLKS_NEEDED(entries) \
+ DIV_ROUND_UP(entries, VNIC_WQ_BUF_BLK_ENTRIES)
+#define VNIC_WQ_BUF_BLKS_MAX VNIC_WQ_BUF_BLKS_NEEDED(4096)
+
+struct vnic_wq {
+ unsigned int index;
+ struct vnic_dev *vdev;
+ struct vnic_wq_ctrl __iomem *ctrl; /* memory-mapped */
+ struct vnic_dev_ring ring;
+ struct vnic_wq_buf *bufs[VNIC_WQ_BUF_BLKS_MAX];
+ struct vnic_wq_buf *to_use;
+ struct vnic_wq_buf *to_clean;
+ unsigned int pkts_outstanding;
+};
+
+static inline unsigned int vnic_wq_desc_avail(struct vnic_wq *wq)
+{
+ /* how many does SW own? */
+ return wq->ring.desc_avail;
+}
+
+static inline unsigned int vnic_wq_desc_used(struct vnic_wq *wq)
+{
+ /* how many does HW own? */
+ return wq->ring.desc_count - wq->ring.desc_avail - 1;
+}
+
+static inline void *vnic_wq_next_desc(struct vnic_wq *wq)
+{
+ return wq->to_use->desc;
+}
+
+static inline void vnic_wq_post(struct vnic_wq *wq,
+ void *os_buf, dma_addr_t dma_addr,
+ unsigned int len, int sop, int eop)
+{
+ struct vnic_wq_buf *buf = wq->to_use;
+
+ buf->sop = sop;
+ buf->os_buf = eop ? os_buf : NULL;
+ buf->dma_addr = dma_addr;
+ buf->len = len;
+
+ buf = buf->next;
+ if (eop) {
+ /* Adding write memory barrier prevents compiler and/or CPU
+ * reordering, thus avoiding descriptor posting before
+ * descriptor is initialized. Otherwise, hardware can read
+ * stale descriptor fields.
+ */
+ wmb();
+ iowrite32(buf->index, &wq->ctrl->posted_index);
+ }
+ wq->to_use = buf;
+
+ wq->ring.desc_avail--;
+}
+
+static inline void vnic_wq_service(struct vnic_wq *wq,
+ struct cq_desc *cq_desc, u16 completed_index,
+ void (*buf_service)(struct vnic_wq *wq,
+ struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque),
+ void *opaque)
+{
+ struct vnic_wq_buf *buf;
+
+ buf = wq->to_clean;
+ while (1) {
+
+ (*buf_service)(wq, cq_desc, buf, opaque);
+
+ wq->ring.desc_avail++;
+
+ wq->to_clean = buf->next;
+
+ if (buf->index == completed_index)
+ break;
+
+ buf = wq->to_clean;
+ }
+}
+
+void vnic_wq_free(struct vnic_wq *wq);
+int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
+ unsigned int desc_count, unsigned int desc_size);
+void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
+ unsigned int error_interrupt_enable,
+ unsigned int error_interrupt_offset);
+unsigned int vnic_wq_error_status(struct vnic_wq *wq);
+void vnic_wq_enable(struct vnic_wq *wq);
+int vnic_wq_disable(struct vnic_wq *wq);
+void vnic_wq_clean(struct vnic_wq *wq,
+ void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf));
+
+#endif /* _VNIC_WQ_H_ */
diff --git a/drivers/scsi/fnic/vnic_wq_copy.c b/drivers/scsi/fnic/vnic_wq_copy.c
new file mode 100644
index 0000000..62f2353
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_wq_copy.c
@@ -0,0 +1,118 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include "vnic_wq_copy.h"
+
+void vnic_wq_copy_enable(struct vnic_wq_copy *wq)
+{
+ iowrite32(1, &wq->ctrl->enable);
+}
+
+int vnic_wq_copy_disable(struct vnic_wq_copy *wq)
+{
+ unsigned int wait;
+
+ iowrite32(0, &wq->ctrl->enable);
+
+ /* Wait for HW to ACK disable request */
+ for (wait = 0; wait < 100; wait++) {
+ if (!(ioread32(&wq->ctrl->running)))
+ return 0;
+ udelay(1);
+ }
+
+ printk(KERN_ERR "Failed to disable Copy WQ[%d],"
+ " fetch index=%d, posted_index=%d\n",
+ wq->index, ioread32(&wq->ctrl->fetch_index),
+ ioread32(&wq->ctrl->posted_index));
+
+ return -ENODEV;
+}
+
+void vnic_wq_copy_clean(struct vnic_wq_copy *wq,
+ void (*q_clean)(struct vnic_wq_copy *wq,
+ struct fcpio_host_req *wq_desc))
+{
+ BUG_ON(ioread32(&wq->ctrl->enable));
+
+ if (vnic_wq_copy_desc_in_use(wq))
+ vnic_wq_copy_service(wq, -1, q_clean);
+
+ wq->to_use_index = wq->to_clean_index = 0;
+
+ iowrite32(0, &wq->ctrl->fetch_index);
+ iowrite32(0, &wq->ctrl->posted_index);
+ iowrite32(0, &wq->ctrl->error_status);
+
+ vnic_dev_clear_desc_ring(&wq->ring);
+}
+
+void vnic_wq_copy_free(struct vnic_wq_copy *wq)
+{
+ struct vnic_dev *vdev;
+
+ vdev = wq->vdev;
+ vnic_dev_free_desc_ring(vdev, &wq->ring);
+ wq->ctrl = NULL;
+}
+
+int vnic_wq_copy_alloc(struct vnic_dev *vdev, struct vnic_wq_copy *wq,
+ unsigned int index, unsigned int desc_count,
+ unsigned int desc_size)
+{
+ int err;
+
+ wq->index = index;
+ wq->vdev = vdev;
+ wq->to_use_index = wq->to_clean_index = 0;
+ wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_WQ, index);
+ if (!wq->ctrl) {
+ printk(KERN_ERR "Failed to hook COPY WQ[%d] resource\n", index);
+ return -EINVAL;
+ }
+
+ vnic_wq_copy_disable(wq);
+
+ err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+void vnic_wq_copy_init(struct vnic_wq_copy *wq, unsigned int cq_index,
+ unsigned int error_interrupt_enable,
+ unsigned int error_interrupt_offset)
+{
+ u64 paddr;
+
+ paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
+ writeq(paddr, &wq->ctrl->ring_base);
+ iowrite32(wq->ring.desc_count, &wq->ctrl->ring_size);
+ iowrite32(0, &wq->ctrl->fetch_index);
+ iowrite32(0, &wq->ctrl->posted_index);
+ iowrite32(cq_index, &wq->ctrl->cq_index);
+ iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);
+ iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
+}
+
diff --git a/drivers/scsi/fnic/vnic_wq_copy.h b/drivers/scsi/fnic/vnic_wq_copy.h
new file mode 100644
index 0000000..c292932
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_wq_copy.h
@@ -0,0 +1,129 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_WQ_COPY_H_
+#define _VNIC_WQ_COPY_H_
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include "vnic_wq.h"
+#include "fcpio.h"
+
+#define VNIC_WQ_COPY_MAX 1
+
+struct vnic_wq_copy {
+ unsigned int index;
+ struct vnic_dev *vdev;
+ struct vnic_wq_ctrl __iomem *ctrl; /* memory-mapped */
+ struct vnic_dev_ring ring;
+ unsigned to_use_index;
+ unsigned to_clean_index;
+};
+
+static inline unsigned int vnic_wq_copy_desc_avail(struct vnic_wq_copy *wq)
+{
+ return wq->ring.desc_avail;
+}
+
+static inline unsigned int vnic_wq_copy_desc_in_use(struct vnic_wq_copy *wq)
+{
+ return wq->ring.desc_count - 1 - wq->ring.desc_avail;
+}
+
+static inline void *vnic_wq_copy_next_desc(struct vnic_wq_copy *wq)
+{
+ struct fcpio_host_req *desc = wq->ring.descs;
+ return &desc[wq->to_use_index];
+}
+
+static inline void vnic_wq_copy_post(struct vnic_wq_copy *wq)
+{
+
+ ((wq->to_use_index + 1) == wq->ring.desc_count) ?
+ (wq->to_use_index = 0) : (wq->to_use_index++);
+ wq->ring.desc_avail--;
+
+ /* Adding write memory barrier prevents compiler and/or CPU
+ * reordering, thus avoiding descriptor posting before
+ * descriptor is initialized. Otherwise, hardware can read
+ * stale descriptor fields.
+ */
+ wmb();
+
+ iowrite32(wq->to_use_index, &wq->ctrl->posted_index);
+}
+
+static inline void vnic_wq_copy_desc_process(struct vnic_wq_copy *wq, u16 index)
+{
+ unsigned int cnt;
+
+ if (wq->to_clean_index <= index)
+ cnt = (index - wq->to_clean_index) + 1;
+ else
+ cnt = wq->ring.desc_count - wq->to_clean_index + index + 1;
+
+ wq->to_clean_index = ((index + 1) % wq->ring.desc_count);
+ wq->ring.desc_avail += cnt;
+
+}
+
+static inline void vnic_wq_copy_service(struct vnic_wq_copy *wq,
+ u16 completed_index,
+ void (*q_service)(struct vnic_wq_copy *wq,
+ struct fcpio_host_req *wq_desc))
+{
+ struct fcpio_host_req *wq_desc = wq->ring.descs;
+ unsigned int curr_index;
+
+ while (1) {
+
+ if (q_service)
+ (*q_service)(wq, &wq_desc[wq->to_clean_index]);
+
+ wq->ring.desc_avail++;
+
+ curr_index = wq->to_clean_index;
+
+ /* increment the to-clean index so that we start
+ * with an unprocessed index next time we enter the loop
+ */
+ ((wq->to_clean_index + 1) == wq->ring.desc_count) ?
+ (wq->to_clean_index = 0) : (wq->to_clean_index++);
+
+ if (curr_index == completed_index)
+ break;
+
+ /* we have cleaned all the entries */
+ if ((completed_index == (u16)-1) &&
+ (wq->to_clean_index == wq->to_use_index))
+ break;
+ }
+}
+
+void vnic_wq_copy_enable(struct vnic_wq_copy *wq);
+int vnic_wq_copy_disable(struct vnic_wq_copy *wq);
+void vnic_wq_copy_free(struct vnic_wq_copy *wq);
+int vnic_wq_copy_alloc(struct vnic_dev *vdev, struct vnic_wq_copy *wq,
+ unsigned int index, unsigned int desc_count, unsigned int desc_size);
+void vnic_wq_copy_init(struct vnic_wq_copy *wq, unsigned int cq_index,
+ unsigned int error_interrupt_enable,
+ unsigned int error_interrupt_offset);
+void vnic_wq_copy_clean(struct vnic_wq_copy *wq,
+ void (*q_clean)(struct vnic_wq_copy *wq,
+ struct fcpio_host_req *wq_desc));
+
+#endif /* _VNIC_WQ_COPY_H_ */
diff --git a/drivers/scsi/fnic/wq_enet_desc.h b/drivers/scsi/fnic/wq_enet_desc.h
new file mode 100644
index 0000000..b121cba
--- /dev/null
+++ b/drivers/scsi/fnic/wq_enet_desc.h
@@ -0,0 +1,96 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _WQ_ENET_DESC_H_
+#define _WQ_ENET_DESC_H_
+
+/* Ethernet work queue descriptor: 16B */
+struct wq_enet_desc {
+ __le64 address;
+ __le16 length;
+ __le16 mss_loopback;
+ __le16 header_length_flags;
+ __le16 vlan_tag;
+};
+
+#define WQ_ENET_ADDR_BITS 64
+#define WQ_ENET_LEN_BITS 14
+#define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1)
+#define WQ_ENET_MSS_BITS 14
+#define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1)
+#define WQ_ENET_MSS_SHIFT 2
+#define WQ_ENET_LOOPBACK_SHIFT 1
+#define WQ_ENET_HDRLEN_BITS 10
+#define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1)
+#define WQ_ENET_FLAGS_OM_BITS 2
+#define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1)
+#define WQ_ENET_FLAGS_EOP_SHIFT 12
+#define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13
+#define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14
+#define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15
+
+#define WQ_ENET_OFFLOAD_MODE_CSUM 0
+#define WQ_ENET_OFFLOAD_MODE_RESERVED 1
+#define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2
+#define WQ_ENET_OFFLOAD_MODE_TSO 3
+
+static inline void wq_enet_desc_enc(struct wq_enet_desc *desc,
+ u64 address, u16 length, u16 mss, u16 header_length,
+ u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap,
+ u8 vlan_tag_insert, u16 vlan_tag, u8 loopback)
+{
+ desc->address = cpu_to_le64(address);
+ desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK);
+ desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) <<
+ WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT);
+ desc->header_length_flags = cpu_to_le16(
+ (header_length & WQ_ENET_HDRLEN_MASK) |
+ (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS |
+ (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT |
+ (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT |
+ (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT |
+ (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT);
+ desc->vlan_tag = cpu_to_le16(vlan_tag);
+}
+
+static inline void wq_enet_desc_dec(struct wq_enet_desc *desc,
+ u64 *address, u16 *length, u16 *mss, u16 *header_length,
+ u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap,
+ u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback)
+{
+ *address = le64_to_cpu(desc->address);
+ *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK;
+ *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) &
+ WQ_ENET_MSS_MASK;
+ *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >>
+ WQ_ENET_LOOPBACK_SHIFT) & 1);
+ *header_length = le16_to_cpu(desc->header_length_flags) &
+ WQ_ENET_HDRLEN_MASK;
+ *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >>
+ WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK);
+ *eop = (u8)((le16_to_cpu(desc->header_length_flags) >>
+ WQ_ENET_FLAGS_EOP_SHIFT) & 1);
+ *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >>
+ WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1);
+ *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >>
+ WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1);
+ *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >>
+ WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1);
+ *vlan_tag = le16_to_cpu(desc->vlan_tag);
+}
+
+#endif /* _WQ_ENET_DESC_H_ */
^ permalink raw reply related [flat|nested] 13+ messages in thread* Re: [RFC][PATCH 5/6] fnic: add descriptor right, buffers, device interface
2009-02-28 2:32 ` [RFC][PATCH 5/6] fnic: add descriptor right, buffers, device interface Abhijeet Joglekar
@ 2009-03-12 20:43 ` Mike Christie
2009-03-12 22:10 ` Abhijeet Arvind Joglekar (abjoglek)
0 siblings, 1 reply; 13+ messages in thread
From: Mike Christie @ 2009-03-12 20:43 UTC (permalink / raw)
To: Abhijeet Joglekar; +Cc: james.bottomley, linux-scsi, jeykholt
Abhijeet Joglekar wrote:
> diff --git a/drivers/scsi/fnic/vnic_cq.h b/drivers/scsi/fnic/vnic_cq.h
> new file mode 100644
> index 0000000..4ede680
> --- /dev/null
> +++ b/drivers/scsi/fnic/vnic_cq.h
> +
> +/*
> + * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
> + * Driver) when both are built with CONFIG options =y
> + */
> +#define vnic_cq_service fnic_cq_service
> +#define vnic_cq_free fnic_cq_free
> +#define vnic_cq_alloc fnic_cq_alloc
> +#define vnic_cq_init fnic_cq_init
> +#define vnic_cq_clean fnic_cq_clean
> +
Are these functions implementations the same as the net ones? I only
looked at the first one and it looked the same.
If you are going to share code then you probably want to put them in a
new module that both enic and fnic can use.
Are you going to ask where the module should then live (drivers/net vs
driver/scsi)? I do not know the answer.
^ permalink raw reply [flat|nested] 13+ messages in thread
* RE: [RFC][PATCH 5/6] fnic: add descriptor right, buffers, device interface
2009-03-12 20:43 ` Mike Christie
@ 2009-03-12 22:10 ` Abhijeet Arvind Joglekar (abjoglek)
2009-03-17 16:41 ` Mike Christie
0 siblings, 1 reply; 13+ messages in thread
From: Abhijeet Arvind Joglekar (abjoglek) @ 2009-03-12 22:10 UTC (permalink / raw)
To: Mike Christie; +Cc: james.bottomley, linux-scsi, Joe Eykholt (jeykholt)
> -----Original Message-----
> From: linux-scsi-owner@vger.kernel.org
> [mailto:linux-scsi-owner@vger.kernel.org] On Behalf Of Mike Christie
> Sent: Thursday, March 12, 2009 1:44 PM
> To: Abhijeet Arvind Joglekar (abjoglek)
> Cc: james.bottomley@hansenpartnership.com;
> linux-scsi@vger.kernel.org; Joe Eykholt (jeykholt)
> Subject: Re: [RFC][PATCH 5/6] fnic: add descriptor right,
> buffers, device interface
>
> Abhijeet Joglekar wrote:
> > diff --git a/drivers/scsi/fnic/vnic_cq.h
> b/drivers/scsi/fnic/vnic_cq.h
> > new file mode 100644 index 0000000..4ede680
> > --- /dev/null
> > +++ b/drivers/scsi/fnic/vnic_cq.h
>
>
> > +
> > +/*
> > + * These defines avoid symbol clash between fnic and enic
> (Cisco 10G Eth
> > + * Driver) when both are built with CONFIG options =y
> > + */
> > +#define vnic_cq_service fnic_cq_service
> > +#define vnic_cq_free fnic_cq_free
> > +#define vnic_cq_alloc fnic_cq_alloc
> > +#define vnic_cq_init fnic_cq_init
> > +#define vnic_cq_clean fnic_cq_clean
> > +
>
> Are these functions implementations the same as the net ones? I only
> looked at the first one and it looked the same.
Yes, they are the same, it is the low-level queue/buffer code that we
wanted to share across enic and fnic. We did consider making a new
module out of it, but its not a lot of code, and there was the problem
of where the common files will reside, and how we share it across the
net and scsi subsystems.
So, the plan was to re-define them for fnic (since enic is already
integrated) and then go with what the kernel community thinks the best
way is.
Thanks for the review
-- abhijeet
> If you are going to share code then you probably want to put
> them in a
> new module that both enic and fnic can use.
>
> Are you going to ask where the module should then live
> (drivers/net vs
> driver/scsi)? I do not know the answer.
> --
> To unsubscribe from this list: send the line "unsubscribe
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>
^ permalink raw reply [flat|nested] 13+ messages in thread
* Re: [RFC][PATCH 5/6] fnic: add descriptor right, buffers, device interface
2009-03-12 22:10 ` Abhijeet Arvind Joglekar (abjoglek)
@ 2009-03-17 16:41 ` Mike Christie
0 siblings, 0 replies; 13+ messages in thread
From: Mike Christie @ 2009-03-17 16:41 UTC (permalink / raw)
To: Abhijeet Arvind Joglekar (abjoglek)
Cc: james.bottomley, linux-scsi, Joe Eykholt (jeykholt)
Abhijeet Arvind Joglekar (abjoglek) wrote:
>> -----Original Message-----
>> From: linux-scsi-owner@vger.kernel.org
>> [mailto:linux-scsi-owner@vger.kernel.org] On Behalf Of Mike Christie
>> Sent: Thursday, March 12, 2009 1:44 PM
>> To: Abhijeet Arvind Joglekar (abjoglek)
>> Cc: james.bottomley@hansenpartnership.com;
>> linux-scsi@vger.kernel.org; Joe Eykholt (jeykholt)
>> Subject: Re: [RFC][PATCH 5/6] fnic: add descriptor right,
>> buffers, device interface
>>
>> Abhijeet Joglekar wrote:
>>> diff --git a/drivers/scsi/fnic/vnic_cq.h
>> b/drivers/scsi/fnic/vnic_cq.h
>>> new file mode 100644 index 0000000..4ede680
>>> --- /dev/null
>>> +++ b/drivers/scsi/fnic/vnic_cq.h
>>
>>> +
>>> +/*
>>> + * These defines avoid symbol clash between fnic and enic
>> (Cisco 10G Eth
>>> + * Driver) when both are built with CONFIG options =y
>>> + */
>>> +#define vnic_cq_service fnic_cq_service
>>> +#define vnic_cq_free fnic_cq_free
>>> +#define vnic_cq_alloc fnic_cq_alloc
>>> +#define vnic_cq_init fnic_cq_init
>>> +#define vnic_cq_clean fnic_cq_clean
>>> +
>> Are these functions implementations the same as the net ones? I only
>> looked at the first one and it looked the same.
>
> Yes, they are the same, it is the low-level queue/buffer code that we
> wanted to share across enic and fnic. We did consider making a new
> module out of it, but its not a lot of code, and there was the problem
Normally I would just make it a new module, but I looked it over again
and it is less than 100 lines so I am not sure if there is some point we
say it is ok to duplicate code. Personally I would not like having to
update multiple modules through two different maintainers (netdev and
scsi). OTOH, updating the one module then making sure that two
maintainers have the right code so their tress can compile can be tricky.
> of where the common files will reside, and how we share it across the
> net and scsi subsystems.
>
I think it can live anywhere. The Kconfig and userspace module deps will
make sure it gets built and loaded correctly.
> So, the plan was to re-define them for fnic (since enic is already
> integrated) and then go with what the kernel community thinks the best
> way is.
>
^ permalink raw reply [flat|nested] 13+ messages in thread
* [RFC][PATCH 6/6] fnic: Patch MAINTAINERS, scsi Makefile, scsi Kconfig
2009-02-28 2:31 [PATCH 0/6] FCoE HBA Driver (fnic) for 2.6.30 feature window Abhijeet Joglekar
` (4 preceding siblings ...)
2009-02-28 2:32 ` [RFC][PATCH 5/6] fnic: add descriptor right, buffers, device interface Abhijeet Joglekar
@ 2009-02-28 2:32 ` Abhijeet Joglekar
5 siblings, 0 replies; 13+ messages in thread
From: Abhijeet Joglekar @ 2009-02-28 2:32 UTC (permalink / raw)
To: james.bottomley, linux-scsi; +Cc: abjoglek, jeykholt
fnic: Patch MAINTAINERS, scsi Makefile, scsi Kconfig
Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com>
---
MAINTAINERS | 8 ++++++++
drivers/scsi/Kconfig | 11 +++++++++++
drivers/scsi/Makefile | 1 +
3 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/MAINTAINERS b/MAINTAINERS
index 59fd2d1..5617798 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1144,6 +1144,14 @@ P: Nils Faerber (port to kernel 2.4)
M: Nils Faerber <nils@kernelconcepts.de>
S: Maintained
+CISCO FCoE HBA DRIVER (drivers/scsi/fnic)
+P: Abhijeet Joglekar
+M: abjoglek@cisco.com
+P: Joe Eykholt
+M: jeykholt@cisco.com
+L: linux-scsi@vger.kernel.org
+S: Supported
+
CODA FILE SYSTEM
P: Jan Harkes
M: jaharkes@cs.cmu.edu
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 256c7be..236bb39 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -618,6 +618,17 @@ config FCOE
---help---
Fibre Channel over Ethernet module
+config FCOE_FNIC
+ tristate "Cisco FNIC Driver"
+ depends on PCI && X86
+ select LIBFC
+ help
+ This is support for the Cisco PCI-Express FCoE HBA.
+
+ To compile this driver as a module, choose M here and read
+ <file:Documentation/scsi/scsi.txt>.
+ The module will be called fnic.
+
config SCSI_DMX3191D
tristate "DMX3191D SCSI support"
depends on PCI && SCSI
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 7461eb0..e0aed2f 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_SCSI_DH) += device_handler/
obj-$(CONFIG_LIBFC) += libfc/
obj-$(CONFIG_FCOE) += fcoe/
+obj-$(CONFIG_FCOE_FNIC) += fnic/
obj-$(CONFIG_ISCSI_TCP) += libiscsi.o libiscsi_tcp.o iscsi_tcp.o
obj-$(CONFIG_INFINIBAND_ISER) += libiscsi.o
obj-$(CONFIG_SCSI_A4000T) += 53c700.o a4000t.o
^ permalink raw reply related [flat|nested] 13+ messages in thread