From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Bhanu Gollapudi" Subject: [v4 PATCH 4/5] bnx2fc: SCSI IO handling and session offload Date: Tue, 25 Jan 2011 18:57:51 -0800 Message-ID: <1296010671.3536.2589.camel@ltsjc-bprakash2.corp.ad.broadcom.com> Mime-Version: 1.0 Content-Type: text/plain; charset=cp1252 Content-Transfer-Encoding: 7bit Return-path: Received: from mms1.broadcom.com ([216.31.210.17]:4694 "EHLO mms1.broadcom.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752381Ab1AZC6c (ORCPT ); Tue, 25 Jan 2011 21:58:32 -0500 Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: devel@open-fcoe.org, linux-scsi@vger.kernel.org Cc: Michael Chan , "michaelc@cs.wisc.edu" 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 --- 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@broadcom.com) + */ + +#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@broadcom.com) + */ + +#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