This patch contains code for IO and target (session) modules.
IO module interfaces with SCSI-ml and firmware to sends the
IOs on the offloaded sessions. Target module is responsbile
to listen to rport events from libfc and offload/upload the
sessions.
Signed-off-by: Bhanu Prakash Gollapudi <bprakash@xxxxxxxxxxxx>
---
drivers/scsi/bnx2fc/bnx2fc_io.c | 1821 ++++++++++++++++++++++++++++++++++++++
drivers/scsi/bnx2fc/bnx2fc_tgt.c | 833 +++++++++++++++++
2 files changed, 2654 insertions(+), 0 deletions(-)
create mode 100644 drivers/scsi/bnx2fc/bnx2fc_io.c
create mode 100644 drivers/scsi/bnx2fc/bnx2fc_tgt.c
diff --git a/drivers/scsi/bnx2fc/bnx2fc_io.c b/drivers/scsi/bnx2fc/bnx2fc_io.c
new file mode 100644
index 0000000..7241232
--- /dev/null
+++ b/drivers/scsi/bnx2fc/bnx2fc_io.c
@@ -0,0 +1,1821 @@
+/* bnx2fc_io.c: Broadcom NetXtreme II Linux FCoE offload driver.
+ * IO manager and SCSI IO processing.
+ *
+ * Copyright (c) 2008 - 2010 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation.
+ *
+ * Written by: Bhanu Prakash Gollapudi (bprakash@xxxxxxxxxxxx)
+ */
+
+#include "bnx2fc.h"
+static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
+ int bd_index);
+static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req);
+static void bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req);
+static int bnx2fc_post_io_req(struct bnx2fc_rport *tgt,
+ struct bnx2fc_cmd *io_req);
+static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req);
+static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req);
+static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
+ struct fcoe_fcp_rsp_payload *fcp_rsp,
+ u8 num_rq);
+
+void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req,
+ unsigned int timer_msec)
+{
+ struct bnx2fc_hba *hba = io_req->port->hba;
+
+ if (queue_delayed_work(hba->timer_work_queue, &io_req->timeout_work,
+ msecs_to_jiffies(timer_msec)))
+ kref_get(&io_req->refcount);
+}
+
+static void bnx2fc_cmd_timeout(struct work_struct *work)
+{
+ struct bnx2fc_cmd *io_req = container_of(work, struct bnx2fc_cmd,
+ timeout_work.work);
+ struct fc_lport *lport;
+ struct fc_rport_priv *rdata;
+ u8 cmd_type = io_req->cmd_type;
+ struct bnx2fc_rport *tgt = io_req->tgt;
+ int logo_issued;
+ int rc;
+
+ BNX2FC_IO_DBG(io_req, "cmd_timeout, cmd_type = %d,"
+ "req_flags = %lx\n", cmd_type, io_req->req_flags);
+
+ spin_lock_bh(&tgt->tgt_lock);
+ if (test_and_clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags)) {
+ clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags);
+ /*
+ * ideally we should hold the io_req until RRQ complets,
+ * and release io_req from timeout hold.
+ */
+ spin_unlock_bh(&tgt->tgt_lock);
+ bnx2fc_send_rrq(io_req);
+ return;
+ }
+ if (test_and_clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags)) {
+ BNX2FC_IO_DBG(io_req, "IO ready for reuse now\n");
+ goto done;
+ }
+
+ switch (cmd_type) {
+ case BNX2FC_SCSI_CMD:
+ if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
+ &io_req->req_flags)) {
+ /* Handle eh_abort timeout */
+ BNX2FC_IO_DBG(io_req, "eh_abort timed out\n");
+ complete(&io_req->tm_done);
+ } else if (test_bit(BNX2FC_FLAG_ISSUE_ABTS,
+ &io_req->req_flags)) {
+ /* Handle internally generated ABTS timeout */
+ BNX2FC_IO_DBG(io_req, "ABTS timed out refcnt = %d\n",
+ io_req->refcount.refcount.counter);
+ if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
+ &io_req->req_flags))) {
+
+ lport = io_req->port->lport;
+ rdata = io_req->tgt->rdata;
+ logo_issued = test_and_set_bit(
+ BNX2FC_FLAG_EXPL_LOGO,
+ &tgt->flags);
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+ spin_unlock_bh(&tgt->tgt_lock);
+
+ /* Explicitly logo the target */
+ if (!logo_issued) {
+ BNX2FC_IO_DBG(io_req, "Explicit "
+ "logo - tgt flags = 0x%lx\n",
+ tgt->flags);
+
+ mutex_lock(&lport->disc.disc_mutex);
+ lport->tt.rport_logoff(rdata);
+ mutex_unlock(&lport->disc.disc_mutex);
+ }
+ return;
+ }
+ } else {
+ /* Hanlde IO timeout */
+ BNX2FC_IO_DBG(io_req, "IO timed out. issue ABTS\n");
+ if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL,
+ &io_req->req_flags)) {
+ BNX2FC_IO_DBG(io_req, "IO completed before "
+ " timer expiry\n");
+ goto done;
+ }
+
+ if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
+ &io_req->req_flags)) {
+ rc = bnx2fc_initiate_abts(io_req);
+ if (rc == SUCCESS)
+ goto done;
+ /*
+ * Explicitly logo the target if
+ * abts initiation fails
+ */
+ lport = io_req->port->lport;
+ rdata = io_req->tgt->rdata;
+ logo_issued = test_and_set_bit(
+ BNX2FC_FLAG_EXPL_LOGO,
+ &tgt->flags);
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+ spin_unlock_bh(&tgt->tgt_lock);
+
+ if (!logo_issued) {
+ BNX2FC_IO_DBG(io_req, "Explicit "
+ "logo - tgt flags = 0x%lx\n",
+ tgt->flags);
+
+
+ mutex_lock(&lport->disc.disc_mutex);
+ lport->tt.rport_logoff(rdata);
+ mutex_unlock(&lport->disc.disc_mutex);
+ }
+ return;
+ } else {
+ BNX2FC_IO_DBG(io_req, "IO already in "
+ "ABTS processing\n");
+ }
+ }
+ break;
+ case BNX2FC_ELS:
+
+ if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {
+ BNX2FC_IO_DBG(io_req, "ABTS for ELS timed out\n");
+
+ if (!test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
+ &io_req->req_flags)) {
+ lport = io_req->port->lport;
+ rdata = io_req->tgt->rdata;
+ logo_issued = test_and_set_bit(
+ BNX2FC_FLAG_EXPL_LOGO,
+ &tgt->flags);
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+ spin_unlock_bh(&tgt->tgt_lock);
+
+ /* Explicitly logo the target */
+ if (!logo_issued) {
+ BNX2FC_IO_DBG(io_req, "Explicitly logo"
+ "(els)\n");
+ mutex_lock(&lport->disc.disc_mutex);
+ lport->tt.rport_logoff(rdata);
+ mutex_unlock(&lport->disc.disc_mutex);
+ }
+ return;
+ }
+ } else {
+ /*
+ * Handle ELS timeout.
+ * tgt_lock is used to sync compl path and timeout
+ * path. If els compl path is processing this IO, we
+ * have nothing to do here, just release the timer hold
+ */
+ BNX2FC_IO_DBG(io_req, "ELS timed out\n");
+ if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE,
+ &io_req->req_flags))
+ goto done;
+
+ /* Indicate the cb_func that this ELS is timed out */
+ set_bit(BNX2FC_FLAG_ELS_TIMEOUT, &io_req->req_flags);
+
+ if ((io_req->cb_func) && (io_req->cb_arg)) {
+ io_req->cb_func(io_req->cb_arg);
+ io_req->cb_arg = NULL;
+ }
+ }
+ break;
+ default:
+ printk(KERN_ERR PFX "cmd_timeout: invalid cmd_type %d\n",
+ cmd_type);
+ break;
+ }
+
+done:
+ /* release the cmd that was held when timer was set */
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+ spin_unlock_bh(&tgt->tgt_lock);
+}
+
+static void bnx2fc_scsi_done(struct bnx2fc_cmd *io_req, int err_code)
+{
+ /* Called with host lock held */
+ struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
+
+ /*
+ * active_cmd_queue may have other command types as well,
+ * and during flush operation, we want to error back only
+ * scsi commands.
+ */
+ if (io_req->cmd_type != BNX2FC_SCSI_CMD)
+ return;
+
+ BNX2FC_IO_DBG(io_req, "scsi_done. err_code = 0x%x\n", err_code);
+ bnx2fc_unmap_sg_list(io_req);
+ io_req->sc_cmd = NULL;
+ if (!sc_cmd) {
+ printk(KERN_ERR PFX "scsi_done - sc_cmd NULL. "
+ "IO(0x%x) already cleaned up\n",
+ io_req->xid);
+ return;
+ }
+ sc_cmd->result = err_code << 16;
+
+ BNX2FC_IO_DBG(io_req, "sc=%p, result=0x%x, retries=%d, allowed=%d\n",
+ sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries,
+ sc_cmd->allowed);
+ scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd));
+ sc_cmd->SCp.ptr = NULL;
+ sc_cmd->scsi_done(sc_cmd);
+}
+
+struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba,
+ u16 min_xid, u16 max_xid)
+{
+ struct bnx2fc_cmd_mgr *cmgr;
+ struct io_bdt *bdt_info;
+ struct bnx2fc_cmd *io_req;
+ size_t len;
+ u32 mem_size;
+ u16 xid;
+ int i;
+ int num_ios;
+ size_t bd_tbl_sz;
+
+ if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) {
+ printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \
+ and max_xid 0x%x\n", min_xid, max_xid);
+ return NULL;
+ }
+ BNX2FC_MISC_DBG("min xid 0x%x, max xid 0x%x\n", min_xid, max_xid);
+
+ num_ios = max_xid - min_xid + 1;
+ len = (num_ios * (sizeof(struct bnx2fc_cmd *)));
+ len += sizeof(struct bnx2fc_cmd_mgr);
+
+ cmgr = kzalloc(len, GFP_KERNEL);
+ if (!cmgr) {
+ printk(KERN_ERR PFX "failed to alloc cmgr\n");
+ return NULL;
+ }
+
+ cmgr->free_list = kzalloc(sizeof(*cmgr->free_list) *
+ num_possible_cpus(), GFP_KERNEL);
+ if (!cmgr->free_list) {
+ printk(KERN_ERR PFX "failed to alloc free_list\n");
+ goto mem_err;
+ }
+
+ cmgr->free_list_lock = kzalloc(sizeof(*cmgr->free_list_lock) *
+ num_possible_cpus(), GFP_KERNEL);
+ if (!cmgr->free_list_lock) {
+ printk(KERN_ERR PFX "failed to alloc free_list_lock\n");
+ goto mem_err;
+ }
+
+ cmgr->hba = hba;
+ cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1);
+
+ for (i = 0; i < num_possible_cpus(); i++) {
+ INIT_LIST_HEAD(&cmgr->free_list[i]);
+ spin_lock_init(&cmgr->free_list_lock[i]);
+ }
+
+ /* Pre-allocated pool of bnx2fc_cmds */
+ xid = BNX2FC_MIN_XID;
+ for (i = 0; i < num_ios; i++) {
+ io_req = kzalloc(sizeof(*io_req), GFP_KERNEL);
+
+ if (!io_req) {
+ printk(KERN_ERR PFX "failed to alloc io_req\n");
+ goto mem_err;
+ }
+
+ INIT_LIST_HEAD(&io_req->link);
+ INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout);
+
+ io_req->xid = xid++;
+ if (io_req->xid >= BNX2FC_MAX_OUTSTANDING_CMNDS)
+ printk(KERN_ERR PFX "ERROR allocating xids - 0x%x\n",
+ io_req->xid);
+ list_add_tail(&io_req->link,
+ &cmgr->free_list[io_req->xid % num_possible_cpus()]);
+ io_req++;
+ }
+
+ /* Allocate pool of io_bdts - one for each bnx2fc_cmd */
+ mem_size = num_ios * sizeof(struct io_bdt *);
+ cmgr->io_bdt_pool = kmalloc(mem_size, GFP_KERNEL);
+ if (!cmgr->io_bdt_pool) {
+ printk(KERN_ERR PFX "failed to alloc io_bdt_pool\n");
+ goto mem_err;
+ }
+
+ mem_size = sizeof(struct io_bdt);
+ for (i = 0; i < num_ios; i++) {
+ cmgr->io_bdt_pool[i] = kmalloc(mem_size, GFP_KERNEL);
+ if (!cmgr->io_bdt_pool[i]) {
+ printk(KERN_ERR PFX "failed to alloc "
+ "io_bdt_pool[%d]\n", i);
+ goto mem_err;
+ }
+ }
+
+ /* Allocate an map fcoe_bdt_ctx structures */
+ bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);
+ for (i = 0; i < num_ios; i++) {
+ bdt_info = cmgr->io_bdt_pool[i];
+ bdt_info->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
+ bd_tbl_sz,
+ &bdt_info->bd_tbl_dma,
+ GFP_KERNEL);
+ if (!bdt_info->bd_tbl) {
+ printk(KERN_ERR PFX "failed to alloc "
+ "bdt_tbl[%d]\n", i);
+ goto mem_err;
+ }
+ }
+
+ return cmgr;
+
+mem_err:
+ bnx2fc_cmd_mgr_free(cmgr);
+ return NULL;
+}
+
+void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr)
+{
+ struct io_bdt *bdt_info;
+ struct bnx2fc_hba *hba = cmgr->hba;
+ size_t bd_tbl_sz;
+ u16 min_xid = BNX2FC_MIN_XID;
+ u16 max_xid = BNX2FC_MAX_XID;
+ int num_ios;
+ int i;
+
+ num_ios = max_xid - min_xid + 1;
+
+ /* Free fcoe_bdt_ctx structures */
+ if (!cmgr->io_bdt_pool)
+ goto free_cmd_pool;
+
+ bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);
+ for (i = 0; i < num_ios; i++) {
+ bdt_info = cmgr->io_bdt_pool[i];
+ if (bdt_info->bd_tbl) {
+ dma_free_coherent(&hba->pcidev->dev, bd_tbl_sz,
+ bdt_info->bd_tbl,
+ bdt_info->bd_tbl_dma);
+ bdt_info->bd_tbl = NULL;
+ }
+ }
+
+ /* Destroy io_bdt pool */
+ for (i = 0; i < num_ios; i++) {
+ kfree(cmgr->io_bdt_pool[i]);
+ cmgr->io_bdt_pool[i] = NULL;
+ }
+
+ kfree(cmgr->io_bdt_pool);
+ cmgr->io_bdt_pool = NULL;
+
+free_cmd_pool:
+ kfree(cmgr->free_list_lock);
+
+ /* Destroy cmd pool */
+ if (!cmgr->free_list)
+ goto free_cmgr;
+
+ for (i = 0; i < num_possible_cpus(); i++) {
+ struct list_head *list;
+ struct list_head *tmp;
+
+ list_for_each_safe(list, tmp, &cmgr->free_list[i]) {
+ struct bnx2fc_cmd *io_req = (struct bnx2fc_cmd *)list;
+ list_del(&io_req->link);
+ kfree(io_req);
+ }
+ }
+ kfree(cmgr->free_list);
+free_cmgr:
+ /* Free command manager itself */
+ kfree(cmgr);
+}
+
+struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type)
+{
+ struct bnx2fc_port *port = tgt->port;
+ struct bnx2fc_hba *hba = port->hba;
+ struct bnx2fc_cmd_mgr *cmd_mgr = hba->cmd_mgr;
+ struct bnx2fc_cmd *io_req;
+ struct list_head *listp;
+ struct io_bdt *bd_tbl;
+ u32 max_sqes;
+ u16 xid;
+
+ max_sqes = tgt->max_sqes;
+ switch (type) {
+ case BNX2FC_TASK_MGMT_CMD:
+ max_sqes = BNX2FC_TM_MAX_SQES;
+ break;
+ case BNX2FC_ELS:
+ max_sqes = BNX2FC_ELS_MAX_SQES;
+ break;
+ default:
+ break;
+ }
+
+ /*
+ * NOTE: Free list insertions and deletions are protected with
+ * cmgr lock
+ */
+ spin_lock_bh(&cmd_mgr->free_list_lock[smp_processor_id()]);
+ if ((list_empty(&(cmd_mgr->free_list[smp_processor_id()]))) ||
+ (tgt->num_active_ios.counter >= max_sqes)) {
+ BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available "
+ "ios(%d):sqes(%d)\n",
+ tgt->num_active_ios.counter, tgt->max_sqes);
+ if (list_empty(&(cmd_mgr->free_list[smp_processor_id()])))
+ printk(KERN_ERR PFX "elstm_alloc: list_empty\n");
+ spin_unlock_bh(&cmd_mgr->free_list_lock[smp_processor_id()]);
+ return NULL;
+ }
+
+ listp = (struct list_head *)
+ cmd_mgr->free_list[smp_processor_id()].next;
+ list_del_init(listp);
+ io_req = (struct bnx2fc_cmd *) listp;
+ xid = io_req->xid;
+ cmd_mgr->cmds[xid] = io_req;
+ atomic_inc(&tgt->num_active_ios);
+ spin_unlock_bh(&cmd_mgr->free_list_lock[smp_processor_id()]);
+
+ INIT_LIST_HEAD(&io_req->link);
+
+ io_req->port = port;
+ io_req->cmd_mgr = cmd_mgr;
+ io_req->req_flags = 0;
+ io_req->cmd_type = type;
+
+ /* Bind io_bdt for this io_req */
+ /* Have a static link between io_req and io_bdt_pool */
+ bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
+ bd_tbl->io_req = io_req;
+
+ /* Hold the io_req against deletion */
+ kref_init(&io_req->refcount);
+ return io_req;
+}
+static struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt)
+{
+ struct bnx2fc_port *port = tgt->port;
+ struct bnx2fc_hba *hba = port->hba;
+ struct bnx2fc_cmd_mgr *cmd_mgr = hba->cmd_mgr;
+ struct bnx2fc_cmd *io_req;
+ struct list_head *listp;
+ struct io_bdt *bd_tbl;
+ u32 max_sqes;
+ u16 xid;
+
+ max_sqes = BNX2FC_SCSI_MAX_SQES;
+ /*
+ * NOTE: Free list insertions and deletions are protected with
+ * cmgr lock
+ */
+ spin_lock_bh(&cmd_mgr->free_list_lock[smp_processor_id()]);
+ if ((list_empty(&cmd_mgr->free_list[smp_processor_id()])) ||
+ (tgt->num_active_ios.counter >= max_sqes)) {
+ spin_unlock_bh(&cmd_mgr->free_list_lock[smp_processor_id()]);
+ return NULL;
+ }
+
+ listp = (struct list_head *)
+ cmd_mgr->free_list[smp_processor_id()].next;
+ list_del_init(listp);
+ io_req = (struct bnx2fc_cmd *) listp;
+ xid = io_req->xid;
+ cmd_mgr->cmds[xid] = io_req;
+ atomic_inc(&tgt->num_active_ios);
+ spin_unlock_bh(&cmd_mgr->free_list_lock[smp_processor_id()]);
+
+ INIT_LIST_HEAD(&io_req->link);
+
+ io_req->port = port;
+ io_req->cmd_mgr = cmd_mgr;
+ io_req->req_flags = 0;
+
+ /* Bind io_bdt for this io_req */
+ /* Have a static link between io_req and io_bdt_pool */
+ bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];
+ bd_tbl->io_req = io_req;
+
+ /* Hold the io_req against deletion */
+ kref_init(&io_req->refcount);
+ return io_req;
+}
+
+void bnx2fc_cmd_release(struct kref *ref)
+{
+ struct bnx2fc_cmd *io_req = container_of(ref,
+ struct bnx2fc_cmd, refcount);
+ struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr;
+
+ spin_lock_bh(&cmd_mgr->free_list_lock[smp_processor_id()]);
+ if (io_req->cmd_type != BNX2FC_SCSI_CMD)
+ bnx2fc_free_mp_resc(io_req);
+ cmd_mgr->cmds[io_req->xid] = NULL;
+ /* Delete IO from retire queue */
+ list_del_init(&io_req->link);
+ /* Add it to the free list */
+ list_add(&io_req->link,
+ &cmd_mgr->free_list[smp_processor_id()]);
+ atomic_dec(&io_req->tgt->num_active_ios);
+ spin_unlock_bh(&cmd_mgr->free_list_lock[smp_processor_id()]);
+}
+
+static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req)
+{
+ struct bnx2fc_mp_req *mp_req = &(io_req->mp_req);
+ struct bnx2fc_hba *hba = io_req->port->hba;
+ size_t sz = sizeof(struct fcoe_bd_ctx);
+
+ /* clear tm flags */
+ mp_req->tm_flags = 0;
+ if (mp_req->mp_req_bd) {
+ dma_free_coherent(&hba->pcidev->dev, sz,
+ mp_req->mp_req_bd,
+ mp_req->mp_req_bd_dma);
+ mp_req->mp_req_bd = NULL;
+ }
+ if (mp_req->mp_resp_bd) {
+ dma_free_coherent(&hba->pcidev->dev, sz,
+ mp_req->mp_resp_bd,
+ mp_req->mp_resp_bd_dma);
+ mp_req->mp_resp_bd = NULL;
+ }
+ if (mp_req->req_buf) {
+ dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
+ mp_req->req_buf,
+ mp_req->req_buf_dma);
+ mp_req->req_buf = NULL;
+ }
+ if (mp_req->resp_buf) {
+ dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
+ mp_req->resp_buf,
+ mp_req->resp_buf_dma);
+ mp_req->resp_buf = NULL;
+ }
+}
+
+int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req)
+{
+ struct bnx2fc_mp_req *mp_req;
+ struct fcoe_bd_ctx *mp_req_bd;
+ struct fcoe_bd_ctx *mp_resp_bd;
+ struct bnx2fc_hba *hba = io_req->port->hba;
+ dma_addr_t addr;
+ size_t sz;
+
+ mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);
+ memset(mp_req, 0, sizeof(struct bnx2fc_mp_req));
+
+ mp_req->req_len = sizeof(struct fcp_cmnd);
+ io_req->data_xfer_len = mp_req->req_len;
+ mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
+ &mp_req->req_buf_dma,
+ GFP_ATOMIC);
+ if (!mp_req->req_buf) {
+ printk(KERN_ERR PFX "unable to alloc MP req buffer\n");
+ bnx2fc_free_mp_resc(io_req);
+ return FAILED;
+ }
+
+ mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
+ &mp_req->resp_buf_dma,
+ GFP_ATOMIC);
+ if (!mp_req->resp_buf) {
+ printk(KERN_ERR PFX "unable to alloc TM resp buffer\n");
+ bnx2fc_free_mp_resc(io_req);
+ return FAILED;
+ }
+ memset(mp_req->req_buf, 0, PAGE_SIZE);
+ memset(mp_req->resp_buf, 0, PAGE_SIZE);
+
+ /* Allocate and map mp_req_bd and mp_resp_bd */
+ sz = sizeof(struct fcoe_bd_ctx);
+ mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,
+ &mp_req->mp_req_bd_dma,
+ GFP_ATOMIC);
+ if (!mp_req->mp_req_bd) {
+ printk(KERN_ERR PFX "unable to alloc MP req bd\n");
+ bnx2fc_free_mp_resc(io_req);
+ return FAILED;
+ }
+ mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,
+ &mp_req->mp_resp_bd_dma,
+ GFP_ATOMIC);
+ if (!mp_req->mp_req_bd) {
+ printk(KERN_ERR PFX "unable to alloc MP resp bd\n");
+ bnx2fc_free_mp_resc(io_req);
+ return FAILED;
+ }
+ /* Fill bd table */
+ addr = mp_req->req_buf_dma;
+ mp_req_bd = mp_req->mp_req_bd;
+ mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff;
+ mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32);
+ mp_req_bd->buf_len = PAGE_SIZE;
+ mp_req_bd->flags = 0;
+
+ /*
+ * MP buffer is either a task mgmt command or an ELS.
+ * So the assumption is that it consumes a single bd
+ * entry in the bd table
+ */
+ mp_resp_bd = mp_req->mp_resp_bd;
+ addr = mp_req->resp_buf_dma;
+ mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff;
+ mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32);
+ mp_resp_bd->buf_len = PAGE_SIZE;
+ mp_resp_bd->flags = 0;
+
+ return SUCCESS;
+}
+
+static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags)
+{
+ struct fc_lport *lport;
+ struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
+ struct fc_rport_libfc_priv *rp = rport->dd_data;
+ struct bnx2fc_port *port;
+ struct bnx2fc_hba *hba;
+ struct bnx2fc_rport *tgt;
+ struct bnx2fc_cmd *io_req;
+ struct bnx2fc_mp_req *tm_req;
+ struct fcoe_task_ctx_entry *task;
+ struct fcoe_task_ctx_entry *task_page;
+ struct Scsi_Host *host = sc_cmd->device->host;
+ struct fc_frame_header *fc_hdr;
+ struct fcp_cmnd *fcp_cmnd;
+ int task_idx, index;
+ int rc = SUCCESS;
+ u16 xid;
+ u32 sid, did;
+ unsigned long start = jiffies;
+
+ lport = shost_priv(host);
+ port = lport_priv(lport);
+ hba = port->hba;
+
+ if (rport == NULL) {
+ printk(KERN_ALERT PFX "device_reset: rport is NULL\n");
+ rc = FAILED;
+ goto tmf_err;
+ }
+
+ rc = fc_block_scsi_eh(sc_cmd);
+ if (rc)
+ return rc;
+
+ if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
+ printk(KERN_ERR PFX "device_reset: link is not ready\n");
+ rc = FAILED;
+ goto tmf_err;
+ }
+ /* rport and tgt are allocated together, so tgt should be non-NULL */
+ tgt = (struct bnx2fc_rport *)&rp[1];
+
+ if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) {
+ printk(KERN_ERR PFX "device_reset: tgt not offloaded\n");
+ rc = FAILED;
+ goto tmf_err;
+ }
+retry_tmf:
+ io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD);
+ if (!io_req) {
+ if (time_after(jiffies, start + HZ)) {
+ printk(KERN_ERR PFX "tmf: Failed TMF");
+ rc = FAILED;
+ goto tmf_err;
+ }
+ msleep(20);
+ goto retry_tmf;
+ }
+ /* Initialize rest of io_req fields */
+ io_req->sc_cmd = sc_cmd;
+ io_req->port = port;
+ io_req->tgt = tgt;
+
+ tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);
+
+ rc = bnx2fc_init_mp_req(io_req);
+ if (rc == FAILED) {
+ printk(KERN_ERR PFX "Task mgmt MP request init failed\n");
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+ goto tmf_err;
+ }
+
+ /* Set TM flags */
+ io_req->io_req_flags = 0;
+ tm_req->tm_flags = tm_flags;
+
+ /* Fill FCP_CMND */
+ bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf);
+ fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf;
+ memset(fcp_cmnd->fc_cdb, 0, sc_cmd->cmd_len);
+ fcp_cmnd->fc_dl = 0;
+
+ /* Fill FC header */
+ fc_hdr = &(tm_req->req_fc_hdr);
+ sid = tgt->sid;
+ did = rport->port_id;
+ bnx2fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, sid, did,
+ FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
+ FC_FC_SEQ_INIT, 0);
+ /* Obtain exchange id */
+ xid = io_req->xid;
+
+ BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid);
+ task_idx = xid/BNX2FC_TASKS_PER_PAGE;
+ index = xid % BNX2FC_TASKS_PER_PAGE;
+
+ /* Initialize task context for this IO request */
+ task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx];
+ task = &(task_page[index]);
+ bnx2fc_init_mp_task(io_req, task);
+
+ sc_cmd->SCp.ptr = (char *)io_req;
+
+ /* Obtain free SQ entry */
+ spin_lock_bh(&tgt->tgt_lock);
+ bnx2fc_add_2_sq(tgt, xid);
+
+ /* Enqueue the io_req to active_tm_queue */
+ io_req->on_tmf_queue = 1;
+ list_add_tail(&io_req->link, &tgt->active_tm_queue);
+
+ init_completion(&io_req->tm_done);
+ io_req->wait_for_comp = 1;
+
+ /* Ring doorbell */
+ bnx2fc_ring_doorbell(tgt);
+ spin_unlock_bh(&tgt->tgt_lock);
+
+ rc = wait_for_completion_timeout(&io_req->tm_done,
+ BNX2FC_TM_TIMEOUT * HZ);
+ spin_lock_bh(&tgt->tgt_lock);
+
+ io_req->wait_for_comp = 0;
+ if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags)))
+ set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags);
+ else
+ /* TM should have just completed */
+ rc = 0;
+ spin_unlock_bh(&tgt->tgt_lock);
+
+ if (!rc) {
+ printk(KERN_ERR PFX "task mgmt command failed...\n");
+ rc = FAILED;
+ } else {
+ printk(KERN_ERR PFX "task mgmt command success...\n");
+ rc = SUCCESS;
+ }
+tmf_err:
+ return rc;
+}
+
+int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req)
+{
+ struct fc_lport *lport;
+ struct bnx2fc_rport *tgt = io_req->tgt;
+ struct fc_rport *rport = tgt->rport;
+ struct fc_rport_priv *rdata = tgt->rdata;
+ struct bnx2fc_hba *hba;
+ struct bnx2fc_port *port;
+ struct bnx2fc_cmd *abts_io_req;
+ struct fcoe_task_ctx_entry *task;
+ struct fcoe_task_ctx_entry *task_page;
+ struct fc_frame_header *fc_hdr;
+ struct bnx2fc_mp_req *abts_req;
+ int task_idx, index;
+ u32 sid, did;
+ u16 xid;
+ int rc = SUCCESS;
+ u32 r_a_tov = rdata->r_a_tov;
+
+ /* called with tgt_lock held */
+ BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n");
+
+ port = io_req->port;
+ hba = port->hba;
+ lport = port->lport;
+
+ if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
+ printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n");
+ rc = FAILED;
+ goto abts_err;
+ }
+
+ if (rport == NULL) {
+ printk(KERN_ALERT PFX "initiate_abts: rport is NULL\n");
+ rc = FAILED;
+ goto abts_err;
+ }
+
+ if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
+ printk(KERN_ERR PFX "initiate_abts: link is not ready\n");
+ rc = FAILED;
+ goto abts_err;
+ }
+
+ abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS);
+ if (!abts_io_req) {
+ printk(KERN_ERR PFX "abts: couldnt allocate cmd\n");
+ rc = FAILED;
+ goto abts_err;
+ }
+
+ /* Initialize rest of io_req fields */
+ abts_io_req->sc_cmd = NULL;
+ abts_io_req->port = port;
+ abts_io_req->tgt = tgt;
+ abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */
+
+ abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req);
+ memset(abts_req, 0, sizeof(struct bnx2fc_mp_req));
+
+ /* Fill FC header */
+ fc_hdr = &(abts_req->req_fc_hdr);
+
+ /* Obtain oxid and rxid for the original exchange to be aborted */
+ fc_hdr->fh_ox_id = htons(io_req->xid);
+ fc_hdr->fh_rx_id = htons(io_req->task->rx_wr_tx_rd.rx_id);
+
+ sid = tgt->sid;
+ did = rport->port_id;
+
+ bnx2fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, sid, did,
+ FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
+ FC_FC_SEQ_INIT, 0);
+
+ xid = abts_io_req->xid;
+ BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n");
+ task_idx = xid/BNX2FC_TASKS_PER_PAGE;
+ index = xid % BNX2FC_TASKS_PER_PAGE;
+
+ /* Initialize task context for this IO request */
+ task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx];
+ task = &(task_page[index]);
+ bnx2fc_init_mp_task(abts_io_req, task);
+
+ /*
+ * ABTS task is a temporary task that will be cleaned up
+ * irrespective of ABTS response. We need to start the timer
+ * for the original exchange, as the CQE is posted for the original
+ * IO request.
+ *
+ * Timer for ABTS is started only when it is originated by a
+ * TM request. For the ABTS issued as part of ULP timeout,
+ * scsi-ml maintains the timers.
+ */
+
+ /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/
+ bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov);
+
+ /* Obtain free SQ entry */
+ bnx2fc_add_2_sq(tgt, xid);
+
+ /* Ring doorbell */
+ bnx2fc_ring_doorbell(tgt);
+
+abts_err:
+ return rc;
+}
+
+int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req)
+{
+ struct fc_lport *lport;
+ struct bnx2fc_rport *tgt = io_req->tgt;
+ struct bnx2fc_hba *hba;
+ struct bnx2fc_port *port;
+ struct bnx2fc_cmd *cleanup_io_req;
+ struct fcoe_task_ctx_entry *task;
+ struct fcoe_task_ctx_entry *task_page;
+ int task_idx, index;
+ u16 xid, orig_xid;
+ int rc = 0;
+
+ /* ASSUMPTION: called with tgt_lock held */
+ BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n");
+
+ port = io_req->port;
+ hba = port->hba;
+ lport = port->lport;
+
+ cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP);
+ if (!cleanup_io_req) {
+ printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n");
+ rc = -1;
+ goto cleanup_err;
+ }
+
+ /* Initialize rest of io_req fields */
+ cleanup_io_req->sc_cmd = NULL;
+ cleanup_io_req->port = port;
+ cleanup_io_req->tgt = tgt;
+ cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */
+
+ xid = cleanup_io_req->xid;
+
+ task_idx = xid/BNX2FC_TASKS_PER_PAGE;
+ index = xid % BNX2FC_TASKS_PER_PAGE;
+
+ /* Initialize task context for this IO request */
+ task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx];
+ task = &(task_page[index]);
+ orig_xid = io_req->xid;
+
+ BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid);
+
+ bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid);
+
+ /* Obtain free SQ entry */
+ bnx2fc_add_2_sq(tgt, xid);
+
+ /* Ring doorbell */
+ bnx2fc_ring_doorbell(tgt);
+
+cleanup_err:
+ return rc;
+}
+
+/**
+ * bnx2fc_eh_target_reset: Reset a target
+ *
+ * @sc_cmd: SCSI command
+ *
+ * Set from SCSI host template to send task mgmt command to the target
+ * and wait for the response
+ */
+int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd)
+{
+ return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET);
+}
+
+/**
+ * bnx2fc_eh_device_reset - Reset a single LUN
+ *
+ * @sc_cmd: SCSI command
+ *
+ * Set from SCSI host template to send task mgmt command to the target
+ * and wait for the response
+ */
+int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd)
+{
+ return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET);
+}
+
+/**
+ * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding
+ * SCSI command
+ *
+ * @sc_cmd: SCSI_ML command pointer
+ *
+ * SCSI abort request handler
+ */
+int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
+{
+ struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
+ struct fc_rport_libfc_priv *rp = rport->dd_data;
+ struct bnx2fc_cmd *io_req;
+ struct fc_lport *lport;
+ struct bnx2fc_rport *tgt;
+ int rc = FAILED;
+
+
+ rc = fc_block_scsi_eh(sc_cmd);
+ if (rc)
+ return rc;
+
+ lport = shost_priv(sc_cmd->device->host);
+ if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
+ printk(KERN_ALERT PFX "eh_abort: link not ready\n");
+ return rc;
+ }
+
+ tgt = (struct bnx2fc_rport *)&rp[1];
+
+ BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n");
+
+ spin_lock_bh(&tgt->tgt_lock);
+ io_req = (struct bnx2fc_cmd *)sc_cmd->SCp.ptr;
+ if (!io_req) {
+ /* Command might have just completed */
+ printk(KERN_ERR PFX "eh_abort: io_req is NULL\n");
+ spin_unlock_bh(&tgt->tgt_lock);
+ return SUCCESS;
+ }
+ BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n",
+ io_req->refcount.refcount.counter);
+
+ /* Hold IO request across abort processing */
+ kref_get(&io_req->refcount);
+
+ BUG_ON(tgt != io_req->tgt);
+
+ /* Remove the io_req from the active_q. */
+ /*
+ * Task Mgmt functions (LUN RESET & TGT RESET) will not
+ * issue an ABTS on this particular IO req, as the
+ * io_req is no longer in the active_q.
+ */
+ if (tgt->flush_in_prog) {
+ printk(KERN_ALERT PFX "eh_abort: io_req (xid = 0x%x) "
+ "flush in progress\n", io_req->xid);
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+ spin_unlock_bh(&tgt->tgt_lock);
+ return SUCCESS;
+ }
+
+ if (io_req->on_active_queue == 0) {
+ printk(KERN_ALERT PFX "eh_abort: io_req (xid = 0x%x) "
+ "not on active_q\n", io_req->xid);
+ /*
+ * This condition can happen only due to the FW bug,
+ * where we do not receive cleanup response from
+ * the FW. Handle this case gracefully by erroring
+ * back the IO request to SCSI-ml
+ */
+ bnx2fc_scsi_done(io_req, DID_ABORT);
+
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+ spin_unlock_bh(&tgt->tgt_lock);
+ return SUCCESS;
+ }
+
+ /*
+ * Only eh_abort processing will remove the IO from
+ * active_cmd_q before processing the request. this is
+ * done to avoid race conditions between IOs aborted
+ * as part of task management completion and eh_abort
+ * processing
+ */
+ list_del_init(&io_req->link);
+ io_req->on_active_queue = 0;
+ /* Move IO req to retire queue */
+ list_add_tail(&io_req->link, &tgt->io_retire_queue);
+
+ init_completion(&io_req->tm_done);
+ io_req->wait_for_comp = 1;
+
+ if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {
+ /* Cancel the current timer running on this io_req */
+ if (cancel_delayed_work(&io_req->timeout_work))
+ kref_put(&io_req->refcount,
+ bnx2fc_cmd_release); /* drop timer hold */
+ set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags);
+ rc = bnx2fc_initiate_abts(io_req);
+ } else {
+ printk(KERN_ALERT PFX "eh_abort: io_req (xid = 0x%x) "
+ "already in abts processing\n", io_req->xid);
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+ spin_unlock_bh(&tgt->tgt_lock);
+ return SUCCESS;
+ }
+ if (rc == FAILED) {
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+ spin_unlock_bh(&tgt->tgt_lock);
+ return rc;
+ }
+ spin_unlock_bh(&tgt->tgt_lock);
+
+ wait_for_completion(&io_req->tm_done);
+
+ spin_lock_bh(&tgt->tgt_lock);
+ io_req->wait_for_comp = 0;
+ if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
+ &io_req->req_flags))) {
+ /* Let the scsi-ml try to recover this command */
+ printk(KERN_ERR PFX "abort failed, xid = 0x%x\n",
+ io_req->xid);
+ rc = FAILED;
+ } else {
+ /*
+ * We come here even when there was a race condition
+ * between timeout and abts completion, and abts
+ * completion happens just in time.
+ */
+ BNX2FC_IO_DBG(io_req, "abort succeeded\n");
+ rc = SUCCESS;
+ bnx2fc_scsi_done(io_req, DID_ABORT);
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+ }
+
+ /* release the reference taken in eh_abort */
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+ spin_unlock_bh(&tgt->tgt_lock);
+ return rc;
+}
+
+void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req,
+ struct fcoe_task_ctx_entry *task,
+ u8 num_rq)
+{
+ BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl "
+ "refcnt = %d, cmd_type = %d\n",
+ io_req->refcount.refcount.counter, io_req->cmd_type);
+ bnx2fc_scsi_done(io_req, DID_ERROR);
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+}
+
+void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req,
+ struct fcoe_task_ctx_entry *task,
+ u8 num_rq)
+{
+ u32 r_ctl;
+ u32 r_a_tov = FC_DEF_R_A_TOV;
+ u8 issue_rrq = 0;
+ struct bnx2fc_rport *tgt = io_req->tgt;
+
+ BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x"
+ "refcnt = %d, cmd_type = %d\n",
+ io_req->xid,
+ io_req->refcount.refcount.counter, io_req->cmd_type);
+
+ if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,
+ &io_req->req_flags)) {
+ BNX2FC_IO_DBG(io_req, "Timer context finished processing"
+ " this io\n");
+ return;
+ }
+
+ /* Do not issue RRQ as this IO is already cleanedup */
+ if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP,
+ &io_req->req_flags))
+ goto io_compl;
+
+ /*
+ * For ABTS issued due to SCSI eh_abort_handler, timeout
+ * values are maintained by scsi-ml itself. Cancel timeout
+ * in case ABTS issued as part of task management function
+ * or due to FW error.
+ */
+ if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))
+ if (cancel_delayed_work(&io_req->timeout_work))
+ kref_put(&io_req->refcount,
+ bnx2fc_cmd_release); /* drop timer hold */
+
+ r_ctl = task->cmn.general.rsp_info.abts_rsp.r_ctl;
+
+ switch (r_ctl) {
+ case FC_RCTL_BA_ACC:
+ /*
+ * Dont release this cmd yet. It will be relesed
+ * after we get RRQ response
+ */
+ BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n");
+ issue_rrq = 1;
+ break;
+
+ case FC_RCTL_BA_RJT:
+ BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n");
+ break;
+ default:
+ printk(KERN_ERR PFX "Unknown ABTS response\n");
+ break;
+ }
+
+ if (issue_rrq) {
+ BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n");
+ set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);
+ }
+ set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags);
+ bnx2fc_cmd_timer_set(io_req, r_a_tov);
+
+io_compl:
+ if (io_req->wait_for_comp) {
+ if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
+ &io_req->req_flags))
+ complete(&io_req->tm_done);
+ } else {
+ /*
+ * We end up here when ABTS is issued as
+ * in asynchronous context, i.e., as part
+ * of task management completion, or
+ * when FW error is received or when the
+ * ABTS is issued when the IO is timed
+ * out.
+ */
+
+ if (io_req->on_active_queue) {
+ list_del_init(&io_req->link);
+ io_req->on_active_queue = 0;
+ /* Move IO req to retire queue */
+ list_add_tail(&io_req->link, &tgt->io_retire_queue);
+ }
+ bnx2fc_scsi_done(io_req, DID_ERROR);
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+ }
+}
+
+static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req)
+{
+ struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
+ struct bnx2fc_rport *tgt = io_req->tgt;
+ struct list_head *list;
+ struct list_head *tmp;
+ struct bnx2fc_cmd *cmd;
+ int tm_lun = sc_cmd->device->lun;
+ int rc = 0;
+ int lun;
+
+ /* called with tgt_lock held */
+ BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n");
+ /*
+ * Walk thru the active_ios queue and ABORT the IO
+ * that matches with the LUN that was reset
+ */
+ list_for_each_safe(list, tmp, &tgt->active_cmd_queue) {
+ BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n");
+ cmd = (struct bnx2fc_cmd *)list;
+ lun = cmd->sc_cmd->device->lun;
+ if (lun == tm_lun) {
+ /* Initiate ABTS on this cmd */
+ if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
+ &cmd->req_flags)) {
+ /* cancel the IO timeout */
+ if (cancel_delayed_work(&io_req->timeout_work))
+ kref_put(&io_req->refcount,
+ bnx2fc_cmd_release);
+ /* timer hold */
+ rc = bnx2fc_initiate_abts(cmd);
+ /* abts shouldnt fail in this context */
+ WARN_ON(rc != SUCCESS);
+ } else
+ printk(KERN_ERR PFX "lun_rst: abts already in"
+ " progress for this IO 0x%x\n",
+ cmd->xid);
+ }
+ }
+}
+
+static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req)
+{
+ struct bnx2fc_rport *tgt = io_req->tgt;
+ struct list_head *list;
+ struct list_head *tmp;
+ struct bnx2fc_cmd *cmd;
+ int rc = 0;
+
+ /* called with tgt_lock held */
+ BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n");
+ /*
+ * Walk thru the active_ios queue and ABORT the IO
+ * that matches with the LUN that was reset
+ */
+ list_for_each_safe(list, tmp, &tgt->active_cmd_queue) {
+ BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n");
+ cmd = (struct bnx2fc_cmd *)list;
+ /* Initiate ABTS */
+ if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
+ &cmd->req_flags)) {
+ /* cancel the IO timeout */
+ if (cancel_delayed_work(&io_req->timeout_work))
+ kref_put(&io_req->refcount,
+ bnx2fc_cmd_release); /* timer hold */
+ rc = bnx2fc_initiate_abts(cmd);
+ /* abts shouldnt fail in this context */
+ WARN_ON(rc != SUCCESS);
+
+ } else
+ printk(KERN_ERR PFX "tgt_rst: abts already in progress"
+ " for this IO 0x%x\n", cmd->xid);
+ }
+}
+
+void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req,
+ struct fcoe_task_ctx_entry *task, u8 num_rq)
+{
+ struct bnx2fc_mp_req *tm_req;
+ struct fc_frame_header *fc_hdr;
+ struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
+ u64 *hdr;
+ u64 *temp_hdr;
+ void *rsp_buf;
+
+ /* Called with tgt_lock held */
+ BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n");
+
+ if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags)))
+ set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags);
+ else {
+ /* TM has already timed out and we got
+ * delayed completion. Ignore completion
+ * processing.
+ */
+ return;
+ }
+
+ tm_req = &(io_req->mp_req);
+ fc_hdr = &(tm_req->resp_fc_hdr);
+ hdr = (u64 *)fc_hdr;
+ temp_hdr = (u64 *)
+ &task->cmn.general.cmd_info.mp_fc_frame.fc_hdr;
+ hdr[0] = cpu_to_be64(temp_hdr[0]);
+ hdr[1] = cpu_to_be64(temp_hdr[1]);
+ hdr[2] = cpu_to_be64(temp_hdr[2]);
+
+ tm_req->resp_len = task->rx_wr_only.sgl_ctx.mul_sges.cur_sge_off;
+
+ rsp_buf = tm_req->resp_buf;
+
+ if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) {
+ bnx2fc_parse_fcp_rsp(io_req,
+ (struct fcoe_fcp_rsp_payload *)
+ rsp_buf, num_rq);
+ if (io_req->fcp_rsp_code == 0) {
+ /* TM successful */
+ if (tm_req->tm_flags & FCP_TMF_LUN_RESET)
+ bnx2fc_lun_reset_cmpl(io_req);
+ else if (tm_req->tm_flags & FCP_TMF_TGT_RESET)
+ bnx2fc_tgt_reset_cmpl(io_req);
+ }
+ } else {
+ printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n",
+ fc_hdr->fh_r_ctl);
+ }
+ if (!sc_cmd->SCp.ptr) {
+ printk(KERN_ALERT PFX "tm_compl: SCp.ptr is NULL\n");
+ return;
+ }
+ switch (io_req->fcp_status) {
+ case FC_GOOD:
+ if (io_req->cdb_status == 0) {
+ /* Good IO completion */
+ sc_cmd->result = DID_OK << 16;
+ } else {
+ /* Transport status is good, SCSI status not good */
+ sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
+ }
+ if (io_req->fcp_resid)
+ scsi_set_resid(sc_cmd, io_req->fcp_resid);
+ break;
+
+ default:
+ BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n",
+ io_req->fcp_status);
+ break;
+ }
+
+ sc_cmd = io_req->sc_cmd;
+ io_req->sc_cmd = NULL;
+
+ /* check if the io_req exists in tgt's tmf_q */
+ if (io_req->on_tmf_queue) {
+
+ list_del_init(&io_req->link);
+ io_req->on_tmf_queue = 0;
+ } else {
+
+ printk(KERN_ALERT PFX "Command not on active_cmd_queue!\n");
+ return;
+ }
+
+ sc_cmd->SCp.ptr = NULL;
+ sc_cmd->scsi_done(sc_cmd);
+
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+ if (io_req->wait_for_comp) {
+ BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n");
+ complete(&io_req->tm_done);
+ }
+}
+
+static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
+ int bd_index)
+{
+ struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
+ int frag_size, sg_frags;
+
+ sg_frags = 0;
+ while (sg_len) {
+ if (sg_len >= BNX2FC_BD_SPLIT_SZ)
+ frag_size = BNX2FC_BD_SPLIT_SZ;
+ else
+ frag_size = sg_len;
+ bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff;
+ bd[bd_index + sg_frags].buf_addr_hi = addr >> 32;
+ bd[bd_index + sg_frags].buf_len = (u16)frag_size;;
+ bd[bd_index + sg_frags].flags = 0;
+
+ addr += (u64) frag_size;
+ sg_frags++;
+ sg_len -= frag_size;
+ }
+ return sg_frags;
+
+}
+
+static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req)
+{
+ struct scsi_cmnd *sc = io_req->sc_cmd;
+ struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
+ struct scatterlist *sg;
+ int byte_count = 0;
+ int sg_count = 0;
+ int bd_count = 0;
+ int sg_frags;
+ unsigned int sg_len;
+ u64 addr;
+ int i;
+
+ sg_count = scsi_dma_map(sc);
+ scsi_for_each_sg(sc, sg, sg_count, i) {
+ sg_len = sg_dma_len(sg);
+ addr = sg_dma_address(sg);
+ if (sg_len > BNX2FC_MAX_BD_LEN) {
+ sg_frags = bnx2fc_split_bd(io_req, addr, sg_len,
+ bd_count);
+ } else {
+
+ sg_frags = 1;
+ bd[bd_count].buf_addr_lo = addr & 0xffffffff;
+ bd[bd_count].buf_addr_hi = addr >> 32;
+ bd[bd_count].buf_len = (u16)sg_len;
+ bd[bd_count].flags = 0;
+ }
+ bd_count += sg_frags;
+ byte_count += sg_len;
+ }
+ if (byte_count != scsi_bufflen(sc))
+ printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, "
+ "task_id = 0x%x\n", byte_count, scsi_bufflen(sc),
+ io_req->xid);
+ return bd_count;
+}
+
+static void bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req)
+{
+ struct scsi_cmnd *sc = io_req->sc_cmd;
+ struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;
+ int bd_count;
+
+ if (scsi_sg_count(sc))
+ bd_count = bnx2fc_map_sg(io_req);
+ else {
+ bd_count = 0;
+ bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0;
+ bd[0].buf_len = bd[0].flags = 0;
+ }
+ io_req->bd_tbl->bd_valid = bd_count;
+}
+
+static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req)
+{
+ struct scsi_cmnd *sc = io_req->sc_cmd;
+
+ if (io_req->bd_tbl->bd_valid && sc) {
+ scsi_dma_unmap(sc);
+ io_req->bd_tbl->bd_valid = 0;
+ }
+}
+
+void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req,
+ struct fcp_cmnd *fcp_cmnd)
+{
+ struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
+ char tag[2];
+
+ memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
+
+ int_to_scsilun(sc_cmd->device->lun,
+ (struct scsi_lun *) fcp_cmnd->fc_lun);
+
+
+ fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len);
+ memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len);
+
+ fcp_cmnd->fc_cmdref = 0;
+ fcp_cmnd->fc_pri_ta = 0;
+ fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags;
+ fcp_cmnd->fc_flags = io_req->io_req_flags;
+
+ if (scsi_populate_tag_msg(sc_cmd, tag)) {
+ switch (tag[0]) {
+ case HEAD_OF_QUEUE_TAG:
+ fcp_cmnd->fc_pri_ta = FCP_PTA_HEADQ;
+ break;
+ case ORDERED_QUEUE_TAG:
+ fcp_cmnd->fc_pri_ta = FCP_PTA_ORDERED;
+ break;
+ default:
+ fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE;
+ break;
+ }
+ } else {
+ fcp_cmnd->fc_pri_ta = 0;
+ }
+}
+
+static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
+ struct fcoe_fcp_rsp_payload *fcp_rsp,
+ u8 num_rq)
+{
+ struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
+ struct bnx2fc_rport *tgt = io_req->tgt;
+ u8 rsp_flags = fcp_rsp->fcp_flags.flags;
+ u32 rq_buff_len = 0;
+ int i;
+ unsigned char *rq_data;
+ unsigned char *dummy;
+ int fcp_sns_len = 0;
+ int fcp_rsp_len = 0;
+
+ io_req->fcp_status = FC_GOOD;
+ io_req->fcp_resid = fcp_rsp->fcp_resid;
+
+ io_req->scsi_comp_flags = rsp_flags;
+ CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status =
+ fcp_rsp->scsi_status_code;
+
+ /* Fetch fcp_rsp_info and fcp_sns_info if available */
+ if (num_rq) {
+
+ /*
+ * We do not anticipate num_rq >1, as the linux defined
+ * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO
+ * 256 bytes of single rq buffer is good enough to hold this.
+ */
+
+ if (rsp_flags &
+ FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) {
+ fcp_rsp_len = rq_buff_len
+ = fcp_rsp->fcp_rsp_len;
+ }
+
+ if (rsp_flags &
+ FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) {
+ fcp_sns_len = fcp_rsp->fcp_sns_len;
+ rq_buff_len += fcp_rsp->fcp_sns_len;
+ }
+
+ io_req->fcp_rsp_len = fcp_rsp_len;
+ io_req->fcp_sns_len = fcp_sns_len;
+
+ if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) {
+ /* Invalid sense sense length. */
+ printk(KERN_ALERT PFX "invalid sns length %d\n",
+ rq_buff_len);
+ /* reset rq_buff_len */
+ rq_buff_len = num_rq * BNX2FC_RQ_BUF_SZ;
+ }
+
+ rq_data = bnx2fc_get_next_rqe(tgt, 1);
+
+ if (num_rq > 1) {
+ /* We do not need extra sense data */
+ for (i = 1; i < num_rq; i++)
+ dummy = bnx2fc_get_next_rqe(tgt, 1);
+ }
+
+ /* fetch fcp_rsp_code */
+ if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) {
+ /* Only for task management function */
+ io_req->fcp_rsp_code = rq_data[3];
+ printk(KERN_ERR PFX "fcp_rsp_code = %d\n",
+ io_req->fcp_rsp_code);
+ }
+
+ /* fetch sense data */
+ rq_data += fcp_rsp_len;
+
+ if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) {
+ printk(KERN_ERR PFX "Truncating sense buffer\n");
+ fcp_sns_len = SCSI_SENSE_BUFFERSIZE;
+ }
+
+ memset(sc_cmd->sense_buffer, 0, sizeof(sc_cmd->sense_buffer));
+ if (fcp_sns_len)
+ memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len);
+
+ /* return RQ entries */
+ for (i = 0; i < num_rq; i++)
+ bnx2fc_return_rqe(tgt, 1);
+ }
+}
+
+/**
+ * bnx2fc_queuecommand - Queuecommand function of the scsi template
+ *
+ * @host: The Scsi_Host the command was issued to
+ * @sc_cmd: struct scsi_cmnd to be executed
+ *
+ * This is the IO strategy routine, called by SCSI-ML
+ **/
+int bnx2fc_queuecommand(struct Scsi_Host *host,
+ struct scsi_cmnd *sc_cmd)
+{
+ struct fc_lport *lport = shost_priv(host);
+ struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
+ struct fc_rport_libfc_priv *rp = rport->dd_data;
+ struct bnx2fc_rport *tgt;
+ struct bnx2fc_cmd *io_req;
+ int rc = 0;
+ int rval;
+
+ rval = fc_remote_port_chkready(rport);
+ if (rval) {
+ sc_cmd->result = rval;
+ sc_cmd->scsi_done(sc_cmd);
+ return 0;
+ }
+
+ if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {
+ rc = SCSI_MLQUEUE_HOST_BUSY;
+ goto exit_qcmd;
+ }
+
+ /* rport and tgt are allocated together, so tgt should be non-NULL */
+ tgt = (struct bnx2fc_rport *)&rp[1];
+
+ if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
+ /*
+ * Session is not offloaded yet. Let SCSI-ml retry
+ * the command.
+ */
+ rc = SCSI_MLQUEUE_TARGET_BUSY;
+ goto exit_qcmd;
+ }
+
+ io_req = bnx2fc_cmd_alloc(tgt);
+ if (!io_req) {
+ rc = SCSI_MLQUEUE_HOST_BUSY;
+ goto exit_qcmd;
+ }
+ io_req->sc_cmd = sc_cmd;
+
+ if (bnx2fc_post_io_req(tgt, io_req)) {
+ printk(KERN_ERR PFX "Unable to post io_req\n");
+ rc = SCSI_MLQUEUE_HOST_BUSY;
+ goto exit_qcmd;
+ }
+exit_qcmd:
+ return rc;
+}
+
+void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req,
+ struct fcoe_task_ctx_entry *task,
+ u8 num_rq)
+{
+ struct fcoe_fcp_rsp_payload *fcp_rsp;
+ struct bnx2fc_rport *tgt = io_req->tgt;
+ struct scsi_cmnd *sc_cmd;
+ struct Scsi_Host *host;
+
+
+ /* scsi_cmd_cmpl is called with tgt lock held */
+
+ if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) {
+ /* we will not receive ABTS response for this IO */
+ BNX2FC_IO_DBG(io_req, "Timer context finished processing "
+ "this scsi cmd\n");
+ }
+
+ /* Cancel the timeout_work, as we received IO completion */
+ if (cancel_delayed_work(&io_req->timeout_work))
+ kref_put(&io_req->refcount,
+ bnx2fc_cmd_release); /* drop timer hold */
+
+ sc_cmd = io_req->sc_cmd;
+ if (sc_cmd == NULL) {
+ printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n");
+ return;
+ }
+
+ /* Fetch fcp_rsp from task context and perform cmd completion */
+ fcp_rsp = (struct fcoe_fcp_rsp_payload *)
+ &(task->cmn.general.rsp_info.fcp_rsp.payload);
+
+ /* parse fcp_rsp and obtain sense data from RQ if available */
+ bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq);
+
+ host = sc_cmd->device->host;
+ if (!sc_cmd->SCp.ptr) {
+ printk(KERN_ERR PFX "SCp.ptr is NULL\n");
+ return;
+ }
+ io_req->sc_cmd = NULL;
+
+ if (io_req->on_active_queue) {
+ list_del_init(&io_req->link);
+ io_req->on_active_queue = 0;
+ /* Move IO req to retire queue */
+ list_add_tail(&io_req->link, &tgt->io_retire_queue);
+ } else {
+ /* This should not happen, but could have been pulled
+ * by bnx2fc_flush_active_ios(), or during a race
+ * between command abort and (late) completion.
+ */
+ BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n");
+ }
+
+ bnx2fc_unmap_sg_list(io_req);
+
+ switch (io_req->fcp_status) {
+ case FC_GOOD:
+ if (io_req->cdb_status == 0) {
+ /* Good IO completion */
+ sc_cmd->result = DID_OK << 16;
+ } else {
+ /* Transport status is good, SCSI status not good */
+ BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d"
+ " fcp_resid = 0x%x\n",
+ io_req->cdb_status, io_req->fcp_resid);
+ sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;
+ }
+ if (io_req->fcp_resid)
+ scsi_set_resid(sc_cmd, io_req->fcp_resid);
+ break;
+ default:
+ printk(KERN_ALERT PFX "scsi_cmd_compl: fcp_status = %d\n",
+ io_req->fcp_status);
+ break;
+ }
+ sc_cmd->SCp.ptr = NULL;
+ sc_cmd->scsi_done(sc_cmd);
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+}
+
+static int bnx2fc_post_io_req(struct bnx2fc_rport *tgt,
+ struct bnx2fc_cmd *io_req)
+{
+ struct fcoe_task_ctx_entry *task;
+ struct fcoe_task_ctx_entry *task_page;
+ struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
+ struct bnx2fc_port *port = tgt->port;
+ struct bnx2fc_hba *hba = port->hba;
+ int task_idx, index;
+ u16 xid;
+
+ /* Initialize rest of io_req fields */
+ io_req->cmd_type = BNX2FC_SCSI_CMD;
+ io_req->port = port;
+ io_req->tgt = tgt;
+ io_req->data_xfer_len = scsi_bufflen(sc_cmd);
+ sc_cmd->SCp.ptr = (char *)io_req;
+
+ if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE)
+ io_req->io_req_flags = BNX2FC_READ;
+ else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE)
+ io_req->io_req_flags = BNX2FC_WRITE;
+ else
+ io_req->io_req_flags = 0;
+
+ xid = io_req->xid;
+
+ /* Build buffer descriptor list for firmware from sg list */
+ bnx2fc_build_bd_list_from_sg(io_req);
+
+ task_idx = xid / BNX2FC_TASKS_PER_PAGE;
+ index = xid % BNX2FC_TASKS_PER_PAGE;
+
+ /* Initialize task context for this IO request */
+ task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx];
+ task = &(task_page[index]);
+ bnx2fc_init_task(io_req, task);
+
+ spin_lock_bh(&tgt->tgt_lock);
+
+ if (tgt->flush_in_prog) {
+ printk(KERN_ERR PFX "Flush in progress..Host Busy\n");
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+ spin_unlock_bh(&tgt->tgt_lock);
+ return -EAGAIN;
+ }
+
+ if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {
+ printk(KERN_ERR PFX "Session not ready...post_io\n");
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+ spin_unlock_bh(&tgt->tgt_lock);
+ return -EAGAIN;
+ }
+
+ /* Time IO req */
+ bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT);
+ /* Obtain free SQ entry */
+ bnx2fc_add_2_sq(tgt, xid);
+
+ /* Enqueue the io_req to active_cmd_queue */
+
+ io_req->on_active_queue = 1;
+ /* move io_req from pending_queue to active_queue */
+ list_add_tail(&io_req->link, &tgt->active_cmd_queue);
+
+ /* Ring doorbell */
+ bnx2fc_ring_doorbell(tgt);
+ spin_unlock_bh(&tgt->tgt_lock);
+ return 0;
+}
diff --git a/drivers/scsi/bnx2fc/bnx2fc_tgt.c b/drivers/scsi/bnx2fc/bnx2fc_tgt.c
new file mode 100644
index 0000000..f4c65b9
--- /dev/null
+++ b/drivers/scsi/bnx2fc/bnx2fc_tgt.c
@@ -0,0 +1,833 @@
+/* bnx2fc_tgt.c: Broadcom NetXtreme II Linux FCoE offload driver.
+ * Handles operations such as session offload/upload etc, and manages
+ * session resources such as connection id and qp resources.
+ *
+ * Copyright (c) 2008 - 2010 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation.
+ *
+ * Written by: Bhanu Prakash Gollapudi (bprakash@xxxxxxxxxxxx)
+ */
+
+#include "bnx2fc.h"
+static void bnx2fc_upld_timer(unsigned long data);
+static void bnx2fc_ofld_timer(unsigned long data);
+static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt,
+ struct bnx2fc_port *port,
+ struct fc_rport_priv *rdata);
+static u32 bnx2fc_alloc_conn_id(struct bnx2fc_hba *hba,
+ struct bnx2fc_rport *tgt);
+static int bnx2fc_alloc_session_resc(struct bnx2fc_hba *hba,
+ struct bnx2fc_rport *tgt);
+static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba,
+ struct bnx2fc_rport *tgt);
+static void bnx2fc_free_conn_id(struct bnx2fc_hba *hba, u32 conn_id);
+
+static void bnx2fc_upld_timer(unsigned long data)
+{
+
+ struct bnx2fc_rport *tgt = (struct bnx2fc_rport *)data;
+
+ BNX2FC_TGT_DBG(tgt, "upld_timer - Upload compl not received!!\n");
+ /* fake upload completion */
+ clear_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
+ set_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
+ wake_up_interruptible(&tgt->upld_wait);
+}
+
+static void bnx2fc_ofld_timer(unsigned long data)
+{
+
+ struct bnx2fc_rport *tgt = (struct bnx2fc_rport *)data;
+
+ BNX2FC_TGT_DBG(tgt, "entered bnx2fc_ofld_timer\n");
+ /* NOTE: This function should never be called, as
+ * offload should never timeout
+ */
+ /*
+ * If the timer has expired, this session is dead
+ * Clear offloaded flag and logout of this device.
+ * Since OFFLOADED flag is cleared, this case
+ * will be considered as offload error and the
+ * port will be logged off, and conn_id, session
+ * resources are freed up in bnx2fc_offload_session
+ */
+ clear_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags);
+ set_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
+ wake_up_interruptible(&tgt->ofld_wait);
+}
+
+static void bnx2fc_offload_session(struct bnx2fc_port *port,
+ struct bnx2fc_rport *tgt,
+ struct fc_rport_priv *rdata)
+{
+ struct fc_lport *lport = rdata->local_port;
+ struct fc_rport *rport = rdata->rport;
+ struct bnx2fc_hba *hba = port->hba;
+ int rval;
+ int i = 0;
+
+ /* Initialize bnx2fc_rport */
+ /* NOTE: tgt is already bzero'd */
+ rval = bnx2fc_init_tgt(tgt, port, rdata);
+ if (rval) {
+ printk(KERN_ERR PFX "Failed to allocate conn id for "
+ "port_id (%6x)\n", rport->port_id);
+ goto ofld_err;
+ }
+
+ if (hba->num_ofld_sess >= BNX2FC_NUM_MAX_SESS) {
+ printk(KERN_ERR PFX "exceeded max sessions port_id (%6x)\n",
+ rport->port_id);
+ goto ofld_err;
+ }
+
+ /* Allocate session resources */
+ rval = bnx2fc_alloc_session_resc(hba, tgt);
+ if (rval) {
+ printk(KERN_ERR PFX "Failed to allocate resources\n");
+ goto ofld_err;
+ }
+
+ /*
+ * Initialize FCoE session offload process.
+ * Upon completion of offload process add
+ * rport to list of rports
+ */
+retry_ofld:
+ clear_bit(BNX2FC_FLAG_OFLD_REQ_CMPL, &tgt->flags);
+ rval = bnx2fc_send_session_ofld_req(port, tgt);
+ if (rval) {
+ printk(KERN_ERR PFX "ofld_req failed\n");
+ goto ofld_err;
+ }
+
+ /*
+ * wait for the session is offloaded and enabled. 3 Secs
+ * should be ample time for this process to complete.
+ */
+ setup_timer(&tgt->ofld_timer, bnx2fc_ofld_timer, (unsigned long)tgt);
+ mod_timer(&tgt->ofld_timer, jiffies + BNX2FC_FW_TIMEOUT);
+
+ wait_event_interruptible(tgt->ofld_wait,
+ (test_bit(
+ BNX2FC_FLAG_OFLD_REQ_CMPL,
+ &tgt->flags)));
+ if (signal_pending(current))
+ flush_signals(current);
+
+ del_timer_sync(&tgt->ofld_timer);
+
+ if (!(test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags))) {
+ if (test_and_clear_bit(BNX2FC_FLAG_CTX_ALLOC_FAILURE,
+ &tgt->flags)) {
+ BNX2FC_TGT_DBG(tgt, "ctx_alloc_failure, "
+ "retry ofld..%d\n", i++);
+ msleep_interruptible(1000);
+ if (i > 3) {
+ i = 0;
+ goto ofld_err;
+ }
+ goto retry_ofld;
+ }
+ goto ofld_err;
+ }
+ return;
+
+ofld_err:
+ /* couldn't offload the session. log off from this rport */
+ BNX2FC_TGT_DBG(tgt, "bnx2fc_offload_session - offload error\n");
+ lport->tt.rport_logoff(rdata);
+ /* Free session resources */
+ bnx2fc_free_session_resc(hba, tgt);
+ if (tgt->fcoe_conn_id != -1)
+ bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
+}
+
+void bnx2fc_flush_active_ios(struct bnx2fc_rport *tgt)
+{
+ struct bnx2fc_cmd *io_req;
+ struct list_head *list;
+ struct list_head *tmp;
+ int rc;
+ int i = 0;
+ BNX2FC_TGT_DBG(tgt, "Entered flush_active_ios - %d\n",
+ tgt->num_active_ios.counter);
+
+ spin_lock_bh(&tgt->tgt_lock);
+ tgt->flush_in_prog = 1;
+
+ list_for_each_safe(list, tmp, &tgt->active_cmd_queue) {
+ i++;
+ io_req = (struct bnx2fc_cmd *)list;
+ list_del_init(&io_req->link);
+ io_req->on_active_queue = 0;
+ BNX2FC_IO_DBG(io_req, "cmd_queue cleanup\n");
+
+ if (cancel_delayed_work(&io_req->timeout_work)) {
+ if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,
+ &io_req->req_flags)) {
+ /* Handle eh_abort timeout */
+ BNX2FC_IO_DBG(io_req, "eh_abort for IO "
+ "cleaned up\n");
+ complete(&io_req->tm_done);
+ }
+ kref_put(&io_req->refcount,
+ bnx2fc_cmd_release); /* drop timer hold */
+ }
+
+ set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags);
+ set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags);
+ rc = bnx2fc_initiate_cleanup(io_req);
+ BUG_ON(rc);
+ }
+
+ list_for_each_safe(list, tmp, &tgt->els_queue) {
+ i++;
+ io_req = (struct bnx2fc_cmd *)list;
+ list_del_init(&io_req->link);
+ io_req->on_active_queue = 0;
+
+ BNX2FC_IO_DBG(io_req, "els_queue cleanup\n");
+
+ if (cancel_delayed_work(&io_req->timeout_work))
+ kref_put(&io_req->refcount,
+ bnx2fc_cmd_release); /* drop timer hold */
+
+ if ((io_req->cb_func) && (io_req->cb_arg)) {
+ io_req->cb_func(io_req->cb_arg);
+ io_req->cb_arg = NULL;
+ }
+
+ rc = bnx2fc_initiate_cleanup(io_req);
+ BUG_ON(rc);
+ }
+
+ list_for_each_safe(list, tmp, &tgt->io_retire_queue) {
+ i++;
+ io_req = (struct bnx2fc_cmd *)list;
+ list_del_init(&io_req->link);
+
+ BNX2FC_IO_DBG(io_req, "retire_queue flush\n");
+
+ if (cancel_delayed_work(&io_req->timeout_work))
+ kref_put(&io_req->refcount, bnx2fc_cmd_release);
+
+ clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);
+ }
+
+ BNX2FC_TGT_DBG(tgt, "IOs flushed = %d\n", i);
+ i = 0;
+ spin_unlock_bh(&tgt->tgt_lock);
+ /* wait for active_ios to go to 0 */
+ while ((tgt->num_active_ios.counter != 0) && (i++ < BNX2FC_WAIT_CNT))
+ msleep(25);
+ if (tgt->num_active_ios.counter != 0)
+ printk(KERN_ERR PFX "CLEANUP on port 0x%x:"
+ " active_ios = %d\n",
+ tgt->rdata->ids.port_id, tgt->num_active_ios.counter);
+ spin_lock_bh(&tgt->tgt_lock);
+ tgt->flush_in_prog = 0;
+ spin_unlock_bh(&tgt->tgt_lock);
+}
+
+static void bnx2fc_upload_session(struct bnx2fc_port *port,
+ struct bnx2fc_rport *tgt)
+{
+ struct bnx2fc_hba *hba = port->hba;
+
+ BNX2FC_TGT_DBG(tgt, "upload_session: active_ios = %d\n",
+ tgt->num_active_ios.counter);
+
+ /*
+ * Called with hba->hba_mutex held.
+ * This is a blocking call
+ */
+ clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
+ bnx2fc_send_session_disable_req(port, tgt);
+
+ /*
+ * wait for upload to complete. 3 Secs
+ * should be sufficient time for this process to complete.
+ */
+ setup_timer(&tgt->upld_timer, bnx2fc_upld_timer, (unsigned long)tgt);
+ mod_timer(&tgt->upld_timer, jiffies + BNX2FC_FW_TIMEOUT);
+
+ BNX2FC_TGT_DBG(tgt, "waiting for disable compl\n");
+ wait_event_interruptible(tgt->upld_wait,
+ (test_bit(
+ BNX2FC_FLAG_UPLD_REQ_COMPL,
+ &tgt->flags)));
+
+ if (signal_pending(current))
+ flush_signals(current);
+
+ del_timer_sync(&tgt->upld_timer);
+
+ /*
+ * traverse thru the active_q and tmf_q and cleanup
+ * IOs in these lists
+ */
+ BNX2FC_TGT_DBG(tgt, "flush/upload - disable wait flags = 0x%lx\n",
+ tgt->flags);
+ bnx2fc_flush_active_ios(tgt);
+
+ /* Issue destroy KWQE */
+ if (test_bit(BNX2FC_FLAG_DISABLED, &tgt->flags)) {
+ BNX2FC_TGT_DBG(tgt, "send destroy req\n");
+ clear_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
+ bnx2fc_send_session_destroy_req(hba, tgt);
+
+ /* wait for destroy to complete */
+ setup_timer(&tgt->upld_timer,
+ bnx2fc_upld_timer, (unsigned long)tgt);
+ mod_timer(&tgt->upld_timer, jiffies + BNX2FC_FW_TIMEOUT);
+
+ wait_event_interruptible(tgt->upld_wait,
+ (test_bit(
+ BNX2FC_FLAG_UPLD_REQ_COMPL,
+ &tgt->flags)));
+
+ if (!(test_bit(BNX2FC_FLAG_DESTROYED, &tgt->flags)))
+ printk(KERN_ERR PFX "ERROR!! destroy timed out\n");
+
+ BNX2FC_TGT_DBG(tgt, "destroy wait complete flags = 0x%lx\n",
+ tgt->flags);
+ if (signal_pending(current))
+ flush_signals(current);
+
+ del_timer_sync(&tgt->upld_timer);
+
+ } else
+ printk(KERN_ERR PFX "ERROR!! DISABLE req timed out, destroy"
+ " not sent to FW\n");
+
+ /* Free session resources */
+ spin_lock_bh(&tgt->cq_lock);
+ bnx2fc_free_session_resc(hba, tgt);
+ bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
+ spin_unlock_bh(&tgt->cq_lock);
+}
+
+static int bnx2fc_init_tgt(struct bnx2fc_rport *tgt,
+ struct bnx2fc_port *port,
+ struct fc_rport_priv *rdata)
+{
+
+ struct fc_rport *rport = rdata->rport;
+ struct bnx2fc_hba *hba = port->hba;
+
+ tgt->rport = rport;
+ tgt->rdata = rdata;
+ tgt->port = port;
+ tgt->fcoe_conn_id = bnx2fc_alloc_conn_id(hba, tgt);
+ if (tgt->fcoe_conn_id == -1)
+ return -1;
+
+ BNX2FC_TGT_DBG(tgt, "init_tgt - conn_id = 0x%x\n", tgt->fcoe_conn_id);
+
+ tgt->max_sqes = BNX2FC_SQ_WQES_MAX;
+ tgt->max_rqes = BNX2FC_RQ_WQES_MAX;
+ tgt->max_cqes = BNX2FC_CQ_WQES_MAX;
+
+ /* Initialize the toggle bit */
+ tgt->sq_curr_toggle_bit = 1;
+ tgt->cq_curr_toggle_bit = 1;
+ tgt->sq_prod_idx = 0;
+ tgt->cq_cons_idx = 0;
+ tgt->rq_prod_idx = 0x8000;
+ tgt->rq_cons_idx = 0;
+ atomic_set(&tgt->num_active_ios, 0);
+
+ tgt->work_time_slice = 2;
+
+ spin_lock_init(&tgt->tgt_lock);
+ spin_lock_init(&tgt->cq_lock);
+
+ /* Initialize active_cmd_queue list */
+ INIT_LIST_HEAD(&tgt->active_cmd_queue);
+
+ /* Initialize IO retire queue */
+ INIT_LIST_HEAD(&tgt->io_retire_queue);
+
+ INIT_LIST_HEAD(&tgt->els_queue);
+
+ /* Initialize active_tm_queue list */
+ INIT_LIST_HEAD(&tgt->active_tm_queue);
+
+ init_waitqueue_head(&tgt->ofld_wait);
+ init_waitqueue_head(&tgt->upld_wait);
+
+ return 0;
+}
+
+/**
+ * This event_callback is called after successful completion of libfc
+ * initiated target login. bnx2fc can proceed with initiating the session
+ * establishment.
+ */
+void bnx2fc_rport_event_handler(struct fc_lport *lport,
+ struct fc_rport_priv *rdata,
+ enum fc_rport_event event)
+{
+ struct bnx2fc_port *port = lport_priv(lport);
+ struct bnx2fc_hba *hba = port->hba;
+ struct fc_rport *rport = rdata->rport;
+ struct fc_rport_libfc_priv *rp;
+ struct bnx2fc_rport *tgt;
+ u32 port_id;
+
+ BNX2FC_HBA_DBG(lport, "rport_event_hdlr: event = %d, port_id = 0x%x\n",
+ event, rdata->ids.port_id);
+ switch (event) {
+ case RPORT_EV_READY:
+ if (!rport) {
+ printk(KERN_ALERT PFX "rport is NULL: ERROR!\n");
+ break;
+ }
+
+ rp = rport->dd_data;
+ if (rport->port_id == FC_FID_DIR_SERV) {
+ /*
+ * bnx2fc_rport structure doesnt exist for
+ * directory server.
+ * We should not come here, as lport will
+ * take care of fabric login
+ */
+ printk(KERN_ALERT PFX "%x - rport_event_handler ERROR\n",
+ rdata->ids.port_id);
+ break;
+ }
+
+ if (rdata->spp_type != FC_TYPE_FCP) {
+ BNX2FC_HBA_DBG(lport, "not FCP type target."
+ " not offloading\n");
+ break;
+ }
+ if (!(rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET)) {
+ BNX2FC_HBA_DBG(lport, "not FCP_TARGET"
+ " not offloading\n");
+ break;
+ }
+
+ /*
+ * Offlaod process is protected with hba mutex.
+ * Use the same mutex_lock for upload process too
+ */
+ mutex_lock(&hba->hba_mutex);
+ tgt = (struct bnx2fc_rport *)&rp[1];
+
+ /* This can happen when ADISC finds the same target */
+ if (test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags)) {
+ BNX2FC_TGT_DBG(tgt, "already offloaded\n");
+ mutex_unlock(&hba->hba_mutex);
+ return;
+ }
+
+ /*
+ * Offload the session. This is a blocking call, and will
+ * wait until the session is offloaded.
+ */
+ bnx2fc_offload_session(port, tgt, rdata);
+
+ BNX2FC_TGT_DBG(tgt, "OFFLOAD num_ofld_sess = %d\n",
+ hba->num_ofld_sess);
+
+ if (test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags)) {
+ /*
+ * Session is offloaded and enabled. Map
+ * doorbell register for this target
+ */
+ BNX2FC_TGT_DBG(tgt, "sess offloaded\n");
+ /* This counter is protected with hba mutex */
+ hba->num_ofld_sess++;
+
+ bnx2fc_map_doorbell(tgt);
+ set_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
+ } else {
+ /*
+ * Offload or enable would have failed.
+ * In offload/enable completion path, the
+ * rport would have already been removed
+ */
+ BNX2FC_TGT_DBG(tgt, "Port is being logged off as "
+ "offloaded flag not set\n");
+ }
+ mutex_unlock(&hba->hba_mutex);
+ break;
+ case RPORT_EV_LOGO:
+ case RPORT_EV_FAILED:
+ case RPORT_EV_STOP:
+ port_id = rdata->ids.port_id;
+ if (port_id == FC_FID_DIR_SERV)
+ break;
+
+ if (!rport) {
+ printk(KERN_ALERT PFX "%x - rport not created Yet!!\n",
+ port_id);
+ break;
+ }
+ rp = rport->dd_data;
+ mutex_lock(&hba->hba_mutex);
+ /*
+ * Perform session upload. Note that rdata->peers is already
+ * removed from disc->rports list before we get this event.
+ */
+ tgt = (struct bnx2fc_rport *)&rp[1];
+
+ if (!(test_bit(BNX2FC_FLAG_OFFLOADED, &tgt->flags))) {
+ mutex_unlock(&hba->hba_mutex);
+ break;
+ }
+ clear_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags);
+
+ bnx2fc_upload_session(port, tgt);
+ hba->num_ofld_sess--;
+ BNX2FC_TGT_DBG(tgt, "UPLOAD num_ofld_sess = %d\n",
+ hba->num_ofld_sess);
+ /*
+ * Try to wake up the linkdown wait thread. If num_ofld_sess
+ * is 0, the waiting therad wakes up
+ */
+ if ((hba->wait_for_link_down) &&
+ (hba->num_ofld_sess == 0)) {
+ wake_up_interruptible(&hba->shutdown_wait);
+ }
+ if (test_bit(BNX2FC_FLAG_EXPL_LOGO, &tgt->flags)) {
+ printk(KERN_ERR PFX "Relogin to the tgt\n");
+ mutex_lock(&lport->disc.disc_mutex);
+ lport->tt.rport_login(rdata);
+ mutex_unlock(&lport->disc.disc_mutex);
+ }
+ mutex_unlock(&hba->hba_mutex);
+
+ break;
+
+ case RPORT_EV_NONE:
+ break;
+ }
+}
+
+/**
+ * bnx2fc_tgt_lookup() - Lookup a bnx2fc_rport by port_id
+ *
+ * @port: bnx2fc_port struct to lookup the target port on
+ * @port_id: The remote port ID to look up
+ */
+struct bnx2fc_rport *bnx2fc_tgt_lookup(struct bnx2fc_port *port,
+ u32 port_id)
+{
+ struct bnx2fc_hba *hba = port->hba;
+ struct bnx2fc_rport *tgt;
+ struct fc_rport_priv *rdata;
+ int i;
+
+ for (i = 0; i < BNX2FC_NUM_MAX_SESS; i++) {
+ tgt = hba->tgt_ofld_list[i];
+ if ((tgt) && (tgt->port == port)) {
+ rdata = tgt->rdata;
+ if (rdata->ids.port_id == port_id) {
+ if (rdata->rp_state != RPORT_ST_DELETE) {
+ BNX2FC_TGT_DBG(tgt, "rport "
+ "obtained\n");
+ return tgt;
+ } else {
+ printk(KERN_ERR PFX "rport 0x%x "
+ "is in DELETED state\n",
+ rdata->ids.port_id);
+ return NULL;
+ }
+ }
+ }
+ }
+ return NULL;
+}
+
+
+/**
+ * bnx2fc_alloc_conn_id - allocates FCOE Connection id
+ *
+ * @hba: pointer to adapter structure
+ * @tgt: pointer to bnx2fc_rport structure
+ */
+static u32 bnx2fc_alloc_conn_id(struct bnx2fc_hba *hba,
+ struct bnx2fc_rport *tgt)
+{
+ u32 conn_id, next;
+
+ /* called with hba mutex held */
+
+ /*
+ * tgt_ofld_list access is synchronized using
+ * both hba mutex and hba lock. Atleast hba mutex or
+ * hba lock needs to be held for read access.
+ */
+
+ spin_lock_bh(&hba->hba_lock);
+ next = hba->next_conn_id;
+ conn_id = hba->next_conn_id++;
+ if (hba->next_conn_id == BNX2FC_NUM_MAX_SESS)
+ hba->next_conn_id = 0;
+
+ while (hba->tgt_ofld_list[conn_id] != NULL) {
+ conn_id++;
+ if (conn_id == BNX2FC_NUM_MAX_SESS)
+ conn_id = 0;
+
+ if (conn_id == next)
+ /* No free conn_ids are available */
+ return -1;
+ }
+ hba->tgt_ofld_list[conn_id] = tgt;
+ tgt->fcoe_conn_id = conn_id;
+ spin_unlock_bh(&hba->hba_lock);
+ return conn_id;
+}
+
+static void bnx2fc_free_conn_id(struct bnx2fc_hba *hba, u32 conn_id)
+{
+ /* called with hba mutex held */
+ spin_lock_bh(&hba->hba_lock);
+ hba->tgt_ofld_list[conn_id] = NULL;
+ hba->next_conn_id = conn_id;
+ spin_unlock_bh(&hba->hba_lock);
+}
+
+/**
+ *bnx2fc_alloc_session_resc - Allocate qp resources for the session
+ *
+ */
+static int bnx2fc_alloc_session_resc(struct bnx2fc_hba *hba,
+ struct bnx2fc_rport *tgt)
+{
+ dma_addr_t page;
+ int num_pages;
+ u32 *pbl;
+
+ /* Allocate and map SQ */
+ tgt->sq_mem_size = tgt->max_sqes * BNX2FC_SQ_WQE_SIZE;
+ tgt->sq_mem_size = (tgt->sq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
+
+ tgt->sq = dma_alloc_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
+ &tgt->sq_dma, GFP_KERNEL);
+ if (!tgt->sq) {
+ printk(KERN_ALERT PFX "unable to allocate SQ memory %d\n",
+ tgt->sq_mem_size);
+ goto mem_alloc_failure;
+ }
+ memset(tgt->sq, 0, tgt->sq_mem_size);
+
+ /* Allocate and map CQ */
+ tgt->cq_mem_size = tgt->max_cqes * BNX2FC_CQ_WQE_SIZE;
+ tgt->cq_mem_size = (tgt->cq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
+
+ tgt->cq = dma_alloc_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
+ &tgt->cq_dma, GFP_KERNEL);
+ if (!tgt->cq) {
+ printk(KERN_ALERT PFX "unable to allocate CQ memory %d\n",
+ tgt->cq_mem_size);
+ goto mem_alloc_failure;
+ }
+ memset(tgt->cq, 0, tgt->cq_mem_size);
+
+ /* Allocate and map RQ and RQ PBL */
+ tgt->rq_mem_size = tgt->max_rqes * BNX2FC_RQ_WQE_SIZE;
+ tgt->rq_mem_size = (tgt->rq_mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
+
+ tgt->rq = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
+ &tgt->rq_dma, GFP_KERNEL);
+ if (!tgt->rq) {
+ printk(KERN_ALERT PFX "unable to allocate RQ memory %d\n",
+ tgt->rq_mem_size);
+ goto mem_alloc_failure;
+ }
+ memset(tgt->rq, 0, tgt->rq_mem_size);
+
+ tgt->rq_pbl_size = (tgt->rq_mem_size / PAGE_SIZE) * sizeof(void *);
+ tgt->rq_pbl_size = (tgt->rq_pbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
+
+ tgt->rq_pbl = dma_alloc_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
+ &tgt->rq_pbl_dma, GFP_KERNEL);
+ if (!tgt->rq_pbl) {
+ printk(KERN_ALERT PFX "unable to allocate RQ PBL %d\n",
+ tgt->rq_pbl_size);
+ goto mem_alloc_failure;
+ }
+
+ memset(tgt->rq_pbl, 0, tgt->rq_pbl_size);
+ num_pages = tgt->rq_mem_size / PAGE_SIZE;
+ page = tgt->rq_dma;
+ pbl = (u32 *)tgt->rq_pbl;
+
+ while (num_pages--) {
+ *pbl = (u32)page;
+ pbl++;
+ *pbl = (u32)((u64)page >> 32);
+ pbl++;
+ page += PAGE_SIZE;
+ }
+
+ /* Allocate and map XFERQ */
+ tgt->xferq_mem_size = tgt->max_sqes * BNX2FC_XFERQ_WQE_SIZE;
+ tgt->xferq_mem_size = (tgt->xferq_mem_size + (PAGE_SIZE - 1)) &
+ PAGE_MASK;
+
+ tgt->xferq = dma_alloc_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
+ &tgt->xferq_dma, GFP_KERNEL);
+ if (!tgt->xferq) {
+ printk(KERN_ALERT PFX "unable to allocate XFERQ %d\n",
+ tgt->xferq_mem_size);
+ goto mem_alloc_failure;
+ }
+ memset(tgt->xferq, 0, tgt->xferq_mem_size);
+
+ /* Allocate and map CONFQ & CONFQ PBL */
+ tgt->confq_mem_size = tgt->max_sqes * BNX2FC_CONFQ_WQE_SIZE;
+ tgt->confq_mem_size = (tgt->confq_mem_size + (PAGE_SIZE - 1)) &
+ PAGE_MASK;
+
+ tgt->confq = dma_alloc_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
+ &tgt->confq_dma, GFP_KERNEL);
+ if (!tgt->confq) {
+ printk(KERN_ALERT PFX "unable to allocate CONFQ %d\n",
+ tgt->confq_mem_size);
+ goto mem_alloc_failure;
+ }
+ memset(tgt->confq, 0, tgt->confq_mem_size);
+
+ tgt->confq_pbl_size =
+ (tgt->confq_mem_size / PAGE_SIZE) * sizeof(void *);
+ tgt->confq_pbl_size =
+ (tgt->confq_pbl_size + (PAGE_SIZE - 1)) & PAGE_MASK;
+
+ tgt->confq_pbl = dma_alloc_coherent(&hba->pcidev->dev,
+ tgt->confq_pbl_size,
+ &tgt->confq_pbl_dma, GFP_KERNEL);
+ if (!tgt->confq_pbl) {
+ printk(KERN_ALERT PFX "unable to allocate CONFQ PBL %d\n",
+ tgt->confq_pbl_size);
+ goto mem_alloc_failure;
+ }
+
+ memset(tgt->confq_pbl, 0, tgt->confq_pbl_size);
+ num_pages = tgt->confq_mem_size / PAGE_SIZE;
+ page = tgt->confq_dma;
+ pbl = (u32 *)tgt->confq_pbl;
+
+ while (num_pages--) {
+ *pbl = (u32)page;
+ pbl++;
+ *pbl = (u32)((u64)page >> 32);
+ pbl++;
+ page += PAGE_SIZE;
+ }
+
+ /* Allocate and map ConnDB */
+ tgt->conn_db_mem_size = sizeof(struct fcoe_conn_db);
+
+ tgt->conn_db = dma_alloc_coherent(&hba->pcidev->dev,
+ tgt->conn_db_mem_size,
+ &tgt->conn_db_dma, GFP_KERNEL);
+ if (!tgt->conn_db) {
+ printk(KERN_ALERT PFX "unable to allocate conn_db %d\n",
+ tgt->conn_db_mem_size);
+ goto mem_alloc_failure;
+ }
+ memset(tgt->conn_db, 0, tgt->conn_db_mem_size);
+
+
+ /* Allocate and map LCQ */
+ tgt->lcq_mem_size = (tgt->max_sqes + 8) * BNX2FC_SQ_WQE_SIZE;
+ tgt->lcq_mem_size = (tgt->lcq_mem_size + (PAGE_SIZE - 1)) &
+ PAGE_MASK;
+
+ tgt->lcq = dma_alloc_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
+ &tgt->lcq_dma, GFP_KERNEL);
+
+ if (!tgt->lcq) {
+ printk(KERN_ALERT PFX "unable to allocate lcq %d\n",
+ tgt->lcq_mem_size);
+ goto mem_alloc_failure;
+ }
+ memset(tgt->lcq, 0, tgt->lcq_mem_size);
+
+ /* Arm CQ */
+ tgt->conn_db->cq_arm.lo = -1;
+ tgt->conn_db->rq_prod = 0x8000;
+
+ return 0;
+
+mem_alloc_failure:
+ bnx2fc_free_session_resc(hba, tgt);
+ bnx2fc_free_conn_id(hba, tgt->fcoe_conn_id);
+ return -ENOMEM;
+}
+
+/**
+ * bnx2i_free_session_resc - free qp resources for the session
+ *
+ * @hba: adapter structure pointer
+ * @tgt: bnx2fc_rport structure pointer
+ *
+ * Free QP resources - SQ/RQ/CQ/XFERQ memory and PBL
+ */
+static void bnx2fc_free_session_resc(struct bnx2fc_hba *hba,
+ struct bnx2fc_rport *tgt)
+{
+ BNX2FC_TGT_DBG(tgt, "Freeing up session resources\n");
+
+ /* Free LCQ */
+ if (tgt->lcq) {
+ dma_free_coherent(&hba->pcidev->dev, tgt->lcq_mem_size,
+ tgt->lcq, tgt->lcq_dma);
+ tgt->lcq = NULL;
+ }
+ /* Free connDB */
+ if (tgt->conn_db) {
+ dma_free_coherent(&hba->pcidev->dev, tgt->conn_db_mem_size,
+ tgt->conn_db, tgt->conn_db_dma);
+ tgt->conn_db = NULL;
+ }
+ /* Free confq and confq pbl */
+ if (tgt->confq_pbl) {
+ dma_free_coherent(&hba->pcidev->dev, tgt->confq_pbl_size,
+ tgt->confq_pbl, tgt->confq_pbl_dma);
+ tgt->confq_pbl = NULL;
+ }
+ if (tgt->confq) {
+ dma_free_coherent(&hba->pcidev->dev, tgt->confq_mem_size,
+ tgt->confq, tgt->confq_dma);
+ tgt->confq = NULL;
+ }
+ /* Free XFERQ */
+ if (tgt->xferq) {
+ dma_free_coherent(&hba->pcidev->dev, tgt->xferq_mem_size,
+ tgt->xferq, tgt->xferq_dma);
+ tgt->xferq = NULL;
+ }
+ /* Free RQ PBL and RQ */
+ if (tgt->rq_pbl) {
+ dma_free_coherent(&hba->pcidev->dev, tgt->rq_pbl_size,
+ tgt->rq_pbl, tgt->rq_pbl_dma);
+ tgt->rq_pbl = NULL;
+ }
+ if (tgt->rq) {
+ dma_free_coherent(&hba->pcidev->dev, tgt->rq_mem_size,
+ tgt->rq, tgt->rq_dma);
+ tgt->rq = NULL;
+ }
+ /* Free CQ */
+ if (tgt->cq) {
+ dma_free_coherent(&hba->pcidev->dev, tgt->cq_mem_size,
+ tgt->cq, tgt->cq_dma);
+ tgt->cq = NULL;
+ }
+ /* Free SQ */
+ if (tgt->sq) {
+ dma_free_coherent(&hba->pcidev->dev, tgt->sq_mem_size,
+ tgt->sq, tgt->sq_dma);
+ tgt->sq = NULL;
+ }
+}
--
1.7.0.6
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