2103 lines · c
1/* bnx2fc_io.c: QLogic Linux FCoE offload driver.2 * IO manager and SCSI IO processing.3 *4 * Copyright (c) 2008-2013 Broadcom Corporation5 * Copyright (c) 2014-2016 QLogic Corporation6 * Copyright (c) 2016-2017 Cavium Inc.7 *8 * This program is free software; you can redistribute it and/or modify9 * it under the terms of the GNU General Public License as published by10 * the Free Software Foundation.11 *12 * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com)13 */14 15#include "bnx2fc.h"16 17#define RESERVE_FREE_LIST_INDEX num_possible_cpus()18 19static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,20 int bd_index);21static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req);22static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req);23static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req);24static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req);25static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,26 struct fcoe_fcp_rsp_payload *fcp_rsp,27 u8 num_rq, unsigned char *rq_data);28 29void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req,30 unsigned int timer_msec)31{32 struct bnx2fc_interface *interface = io_req->port->priv;33 34 if (queue_delayed_work(interface->timer_work_queue,35 &io_req->timeout_work,36 msecs_to_jiffies(timer_msec)))37 kref_get(&io_req->refcount);38}39 40static void bnx2fc_cmd_timeout(struct work_struct *work)41{42 struct bnx2fc_cmd *io_req = container_of(work, struct bnx2fc_cmd,43 timeout_work.work);44 u8 cmd_type = io_req->cmd_type;45 struct bnx2fc_rport *tgt = io_req->tgt;46 int rc;47 48 BNX2FC_IO_DBG(io_req, "cmd_timeout, cmd_type = %d,"49 "req_flags = %lx\n", cmd_type, io_req->req_flags);50 51 spin_lock_bh(&tgt->tgt_lock);52 if (test_and_clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags)) {53 clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags);54 /*55 * ideally we should hold the io_req until RRQ complets,56 * and release io_req from timeout hold.57 */58 spin_unlock_bh(&tgt->tgt_lock);59 bnx2fc_send_rrq(io_req);60 return;61 }62 if (test_and_clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags)) {63 BNX2FC_IO_DBG(io_req, "IO ready for reuse now\n");64 goto done;65 }66 67 switch (cmd_type) {68 case BNX2FC_SCSI_CMD:69 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,70 &io_req->req_flags)) {71 /* Handle eh_abort timeout */72 BNX2FC_IO_DBG(io_req, "eh_abort timed out\n");73 complete(&io_req->abts_done);74 } else if (test_bit(BNX2FC_FLAG_ISSUE_ABTS,75 &io_req->req_flags)) {76 /* Handle internally generated ABTS timeout */77 BNX2FC_IO_DBG(io_req, "ABTS timed out refcnt = %d\n",78 kref_read(&io_req->refcount));79 if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,80 &io_req->req_flags))) {81 /*82 * Cleanup and return original command to83 * mid-layer.84 */85 bnx2fc_initiate_cleanup(io_req);86 kref_put(&io_req->refcount, bnx2fc_cmd_release);87 spin_unlock_bh(&tgt->tgt_lock);88 89 return;90 }91 } else {92 /* Hanlde IO timeout */93 BNX2FC_IO_DBG(io_req, "IO timed out. issue ABTS\n");94 if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL,95 &io_req->req_flags)) {96 BNX2FC_IO_DBG(io_req, "IO completed before "97 " timer expiry\n");98 goto done;99 }100 101 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,102 &io_req->req_flags)) {103 rc = bnx2fc_initiate_abts(io_req);104 if (rc == SUCCESS)105 goto done;106 107 kref_put(&io_req->refcount, bnx2fc_cmd_release);108 spin_unlock_bh(&tgt->tgt_lock);109 110 return;111 } else {112 BNX2FC_IO_DBG(io_req, "IO already in "113 "ABTS processing\n");114 }115 }116 break;117 case BNX2FC_ELS:118 119 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {120 BNX2FC_IO_DBG(io_req, "ABTS for ELS timed out\n");121 122 if (!test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,123 &io_req->req_flags)) {124 kref_put(&io_req->refcount, bnx2fc_cmd_release);125 spin_unlock_bh(&tgt->tgt_lock);126 127 return;128 }129 } else {130 /*131 * Handle ELS timeout.132 * tgt_lock is used to sync compl path and timeout133 * path. If els compl path is processing this IO, we134 * have nothing to do here, just release the timer hold135 */136 BNX2FC_IO_DBG(io_req, "ELS timed out\n");137 if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE,138 &io_req->req_flags))139 goto done;140 141 /* Indicate the cb_func that this ELS is timed out */142 set_bit(BNX2FC_FLAG_ELS_TIMEOUT, &io_req->req_flags);143 144 if ((io_req->cb_func) && (io_req->cb_arg)) {145 io_req->cb_func(io_req->cb_arg);146 io_req->cb_arg = NULL;147 }148 }149 break;150 default:151 printk(KERN_ERR PFX "cmd_timeout: invalid cmd_type %d\n",152 cmd_type);153 break;154 }155 156done:157 /* release the cmd that was held when timer was set */158 kref_put(&io_req->refcount, bnx2fc_cmd_release);159 spin_unlock_bh(&tgt->tgt_lock);160}161 162static void bnx2fc_scsi_done(struct bnx2fc_cmd *io_req, int err_code)163{164 /* Called with host lock held */165 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;166 167 /*168 * active_cmd_queue may have other command types as well,169 * and during flush operation, we want to error back only170 * scsi commands.171 */172 if (io_req->cmd_type != BNX2FC_SCSI_CMD)173 return;174 175 BNX2FC_IO_DBG(io_req, "scsi_done. err_code = 0x%x\n", err_code);176 if (test_bit(BNX2FC_FLAG_CMD_LOST, &io_req->req_flags)) {177 /* Do not call scsi done for this IO */178 return;179 }180 181 bnx2fc_unmap_sg_list(io_req);182 io_req->sc_cmd = NULL;183 184 /* Sanity checks before returning command to mid-layer */185 if (!sc_cmd) {186 printk(KERN_ERR PFX "scsi_done - sc_cmd NULL. "187 "IO(0x%x) already cleaned up\n",188 io_req->xid);189 return;190 }191 if (!sc_cmd->device) {192 pr_err(PFX "0x%x: sc_cmd->device is NULL.\n", io_req->xid);193 return;194 }195 if (!sc_cmd->device->host) {196 pr_err(PFX "0x%x: sc_cmd->device->host is NULL.\n",197 io_req->xid);198 return;199 }200 201 sc_cmd->result = err_code << 16;202 203 BNX2FC_IO_DBG(io_req, "sc=%p, result=0x%x, retries=%d, allowed=%d\n",204 sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries,205 sc_cmd->allowed);206 scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd));207 bnx2fc_priv(sc_cmd)->io_req = NULL;208 scsi_done(sc_cmd);209}210 211struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba)212{213 struct bnx2fc_cmd_mgr *cmgr;214 struct io_bdt *bdt_info;215 struct bnx2fc_cmd *io_req;216 size_t len;217 u32 mem_size;218 u16 xid;219 int i;220 int num_ios, num_pri_ios;221 size_t bd_tbl_sz;222 int arr_sz = num_possible_cpus() + 1;223 u16 min_xid = BNX2FC_MIN_XID;224 u16 max_xid = hba->max_xid;225 226 if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) {227 printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \228 and max_xid 0x%x\n", min_xid, max_xid);229 return NULL;230 }231 BNX2FC_MISC_DBG("min xid 0x%x, max xid 0x%x\n", min_xid, max_xid);232 233 num_ios = max_xid - min_xid + 1;234 len = (num_ios * (sizeof(struct bnx2fc_cmd *)));235 len += sizeof(struct bnx2fc_cmd_mgr);236 237 cmgr = kzalloc(len, GFP_KERNEL);238 if (!cmgr) {239 printk(KERN_ERR PFX "failed to alloc cmgr\n");240 return NULL;241 }242 243 cmgr->hba = hba;244 cmgr->free_list = kcalloc(arr_sz, sizeof(*cmgr->free_list),245 GFP_KERNEL);246 if (!cmgr->free_list) {247 printk(KERN_ERR PFX "failed to alloc free_list\n");248 goto mem_err;249 }250 251 cmgr->free_list_lock = kcalloc(arr_sz, sizeof(*cmgr->free_list_lock),252 GFP_KERNEL);253 if (!cmgr->free_list_lock) {254 printk(KERN_ERR PFX "failed to alloc free_list_lock\n");255 kfree(cmgr->free_list);256 cmgr->free_list = NULL;257 goto mem_err;258 }259 260 cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1);261 262 for (i = 0; i < arr_sz; i++) {263 INIT_LIST_HEAD(&cmgr->free_list[i]);264 spin_lock_init(&cmgr->free_list_lock[i]);265 }266 267 /*268 * Pre-allocated pool of bnx2fc_cmds.269 * Last entry in the free list array is the free list270 * of slow path requests.271 */272 xid = BNX2FC_MIN_XID;273 num_pri_ios = num_ios - hba->elstm_xids;274 for (i = 0; i < num_ios; i++) {275 io_req = kzalloc(sizeof(*io_req), GFP_KERNEL);276 277 if (!io_req) {278 printk(KERN_ERR PFX "failed to alloc io_req\n");279 goto mem_err;280 }281 282 INIT_LIST_HEAD(&io_req->link);283 INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout);284 285 io_req->xid = xid++;286 if (i < num_pri_ios)287 list_add_tail(&io_req->link,288 &cmgr->free_list[io_req->xid %289 num_possible_cpus()]);290 else291 list_add_tail(&io_req->link,292 &cmgr->free_list[num_possible_cpus()]);293 io_req++;294 }295 296 /* Allocate pool of io_bdts - one for each bnx2fc_cmd */297 mem_size = num_ios * sizeof(struct io_bdt *);298 cmgr->io_bdt_pool = kzalloc(mem_size, GFP_KERNEL);299 if (!cmgr->io_bdt_pool) {300 printk(KERN_ERR PFX "failed to alloc io_bdt_pool\n");301 goto mem_err;302 }303 304 mem_size = sizeof(struct io_bdt);305 for (i = 0; i < num_ios; i++) {306 cmgr->io_bdt_pool[i] = kmalloc(mem_size, GFP_KERNEL);307 if (!cmgr->io_bdt_pool[i]) {308 printk(KERN_ERR PFX "failed to alloc "309 "io_bdt_pool[%d]\n", i);310 goto mem_err;311 }312 }313 314 /* Allocate an map fcoe_bdt_ctx structures */315 bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);316 for (i = 0; i < num_ios; i++) {317 bdt_info = cmgr->io_bdt_pool[i];318 bdt_info->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,319 bd_tbl_sz,320 &bdt_info->bd_tbl_dma,321 GFP_KERNEL);322 if (!bdt_info->bd_tbl) {323 printk(KERN_ERR PFX "failed to alloc "324 "bdt_tbl[%d]\n", i);325 goto mem_err;326 }327 }328 329 return cmgr;330 331mem_err:332 bnx2fc_cmd_mgr_free(cmgr);333 return NULL;334}335 336void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr)337{338 struct io_bdt *bdt_info;339 struct bnx2fc_hba *hba = cmgr->hba;340 size_t bd_tbl_sz;341 u16 min_xid = BNX2FC_MIN_XID;342 u16 max_xid = hba->max_xid;343 int num_ios;344 int i;345 346 num_ios = max_xid - min_xid + 1;347 348 /* Free fcoe_bdt_ctx structures */349 if (!cmgr->io_bdt_pool)350 goto free_cmd_pool;351 352 bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx);353 for (i = 0; i < num_ios; i++) {354 bdt_info = cmgr->io_bdt_pool[i];355 if (bdt_info->bd_tbl) {356 dma_free_coherent(&hba->pcidev->dev, bd_tbl_sz,357 bdt_info->bd_tbl,358 bdt_info->bd_tbl_dma);359 bdt_info->bd_tbl = NULL;360 }361 }362 363 /* Destroy io_bdt pool */364 for (i = 0; i < num_ios; i++) {365 kfree(cmgr->io_bdt_pool[i]);366 cmgr->io_bdt_pool[i] = NULL;367 }368 369 kfree(cmgr->io_bdt_pool);370 cmgr->io_bdt_pool = NULL;371 372free_cmd_pool:373 kfree(cmgr->free_list_lock);374 375 /* Destroy cmd pool */376 if (!cmgr->free_list)377 goto free_cmgr;378 379 for (i = 0; i < num_possible_cpus() + 1; i++) {380 struct bnx2fc_cmd *tmp, *io_req;381 382 list_for_each_entry_safe(io_req, tmp,383 &cmgr->free_list[i], link) {384 list_del(&io_req->link);385 kfree(io_req);386 }387 }388 kfree(cmgr->free_list);389free_cmgr:390 /* Free command manager itself */391 kfree(cmgr);392}393 394struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type)395{396 struct fcoe_port *port = tgt->port;397 struct bnx2fc_interface *interface = port->priv;398 struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr;399 struct bnx2fc_cmd *io_req;400 struct list_head *listp;401 struct io_bdt *bd_tbl;402 int index = RESERVE_FREE_LIST_INDEX;403 u32 free_sqes;404 u32 max_sqes;405 u16 xid;406 407 max_sqes = tgt->max_sqes;408 switch (type) {409 case BNX2FC_TASK_MGMT_CMD:410 max_sqes = BNX2FC_TM_MAX_SQES;411 break;412 case BNX2FC_ELS:413 max_sqes = BNX2FC_ELS_MAX_SQES;414 break;415 default:416 break;417 }418 419 /*420 * NOTE: Free list insertions and deletions are protected with421 * cmgr lock422 */423 spin_lock_bh(&cmd_mgr->free_list_lock[index]);424 free_sqes = atomic_read(&tgt->free_sqes);425 if ((list_empty(&(cmd_mgr->free_list[index]))) ||426 (tgt->num_active_ios.counter >= max_sqes) ||427 (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) {428 BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available "429 "ios(%d):sqes(%d)\n",430 tgt->num_active_ios.counter, tgt->max_sqes);431 if (list_empty(&(cmd_mgr->free_list[index])))432 printk(KERN_ERR PFX "elstm_alloc: list_empty\n");433 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);434 return NULL;435 }436 437 listp = (struct list_head *)438 cmd_mgr->free_list[index].next;439 list_del_init(listp);440 io_req = (struct bnx2fc_cmd *) listp;441 xid = io_req->xid;442 cmd_mgr->cmds[xid] = io_req;443 atomic_inc(&tgt->num_active_ios);444 atomic_dec(&tgt->free_sqes);445 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);446 447 INIT_LIST_HEAD(&io_req->link);448 449 io_req->port = port;450 io_req->cmd_mgr = cmd_mgr;451 io_req->req_flags = 0;452 io_req->cmd_type = type;453 454 /* Bind io_bdt for this io_req */455 /* Have a static link between io_req and io_bdt_pool */456 bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];457 bd_tbl->io_req = io_req;458 459 /* Hold the io_req against deletion */460 kref_init(&io_req->refcount);461 return io_req;462}463 464struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt)465{466 struct fcoe_port *port = tgt->port;467 struct bnx2fc_interface *interface = port->priv;468 struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr;469 struct bnx2fc_cmd *io_req;470 struct list_head *listp;471 struct io_bdt *bd_tbl;472 u32 free_sqes;473 u32 max_sqes;474 u16 xid;475 int index = raw_smp_processor_id();476 477 max_sqes = BNX2FC_SCSI_MAX_SQES;478 /*479 * NOTE: Free list insertions and deletions are protected with480 * cmgr lock481 */482 spin_lock_bh(&cmd_mgr->free_list_lock[index]);483 free_sqes = atomic_read(&tgt->free_sqes);484 if ((list_empty(&cmd_mgr->free_list[index])) ||485 (tgt->num_active_ios.counter >= max_sqes) ||486 (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) {487 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);488 return NULL;489 }490 491 listp = (struct list_head *)492 cmd_mgr->free_list[index].next;493 list_del_init(listp);494 io_req = (struct bnx2fc_cmd *) listp;495 xid = io_req->xid;496 cmd_mgr->cmds[xid] = io_req;497 atomic_inc(&tgt->num_active_ios);498 atomic_dec(&tgt->free_sqes);499 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);500 501 INIT_LIST_HEAD(&io_req->link);502 503 io_req->port = port;504 io_req->cmd_mgr = cmd_mgr;505 io_req->req_flags = 0;506 507 /* Bind io_bdt for this io_req */508 /* Have a static link between io_req and io_bdt_pool */509 bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid];510 bd_tbl->io_req = io_req;511 512 /* Hold the io_req against deletion */513 kref_init(&io_req->refcount);514 return io_req;515}516 517void bnx2fc_cmd_release(struct kref *ref)518{519 struct bnx2fc_cmd *io_req = container_of(ref,520 struct bnx2fc_cmd, refcount);521 struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr;522 int index;523 524 if (io_req->cmd_type == BNX2FC_SCSI_CMD)525 index = io_req->xid % num_possible_cpus();526 else527 index = RESERVE_FREE_LIST_INDEX;528 529 530 spin_lock_bh(&cmd_mgr->free_list_lock[index]);531 if (io_req->cmd_type != BNX2FC_SCSI_CMD)532 bnx2fc_free_mp_resc(io_req);533 cmd_mgr->cmds[io_req->xid] = NULL;534 /* Delete IO from retire queue */535 list_del_init(&io_req->link);536 /* Add it to the free list */537 list_add(&io_req->link,538 &cmd_mgr->free_list[index]);539 atomic_dec(&io_req->tgt->num_active_ios);540 spin_unlock_bh(&cmd_mgr->free_list_lock[index]);541 542}543 544static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req)545{546 struct bnx2fc_mp_req *mp_req = &(io_req->mp_req);547 struct bnx2fc_interface *interface = io_req->port->priv;548 struct bnx2fc_hba *hba = interface->hba;549 size_t sz = sizeof(struct fcoe_bd_ctx);550 551 /* clear tm flags */552 mp_req->tm_flags = 0;553 if (mp_req->mp_req_bd) {554 dma_free_coherent(&hba->pcidev->dev, sz,555 mp_req->mp_req_bd,556 mp_req->mp_req_bd_dma);557 mp_req->mp_req_bd = NULL;558 }559 if (mp_req->mp_resp_bd) {560 dma_free_coherent(&hba->pcidev->dev, sz,561 mp_req->mp_resp_bd,562 mp_req->mp_resp_bd_dma);563 mp_req->mp_resp_bd = NULL;564 }565 if (mp_req->req_buf) {566 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,567 mp_req->req_buf,568 mp_req->req_buf_dma);569 mp_req->req_buf = NULL;570 }571 if (mp_req->resp_buf) {572 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,573 mp_req->resp_buf,574 mp_req->resp_buf_dma);575 mp_req->resp_buf = NULL;576 }577}578 579int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req)580{581 struct bnx2fc_mp_req *mp_req;582 struct fcoe_bd_ctx *mp_req_bd;583 struct fcoe_bd_ctx *mp_resp_bd;584 struct bnx2fc_interface *interface = io_req->port->priv;585 struct bnx2fc_hba *hba = interface->hba;586 dma_addr_t addr;587 size_t sz;588 589 mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);590 memset(mp_req, 0, sizeof(struct bnx2fc_mp_req));591 592 if (io_req->cmd_type != BNX2FC_ELS) {593 mp_req->req_len = sizeof(struct fcp_cmnd);594 io_req->data_xfer_len = mp_req->req_len;595 } else596 mp_req->req_len = io_req->data_xfer_len;597 598 mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,599 &mp_req->req_buf_dma,600 GFP_ATOMIC);601 if (!mp_req->req_buf) {602 printk(KERN_ERR PFX "unable to alloc MP req buffer\n");603 bnx2fc_free_mp_resc(io_req);604 return FAILED;605 }606 607 mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,608 &mp_req->resp_buf_dma,609 GFP_ATOMIC);610 if (!mp_req->resp_buf) {611 printk(KERN_ERR PFX "unable to alloc TM resp buffer\n");612 bnx2fc_free_mp_resc(io_req);613 return FAILED;614 }615 memset(mp_req->req_buf, 0, CNIC_PAGE_SIZE);616 memset(mp_req->resp_buf, 0, CNIC_PAGE_SIZE);617 618 /* Allocate and map mp_req_bd and mp_resp_bd */619 sz = sizeof(struct fcoe_bd_ctx);620 mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,621 &mp_req->mp_req_bd_dma,622 GFP_ATOMIC);623 if (!mp_req->mp_req_bd) {624 printk(KERN_ERR PFX "unable to alloc MP req bd\n");625 bnx2fc_free_mp_resc(io_req);626 return FAILED;627 }628 mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz,629 &mp_req->mp_resp_bd_dma,630 GFP_ATOMIC);631 if (!mp_req->mp_resp_bd) {632 printk(KERN_ERR PFX "unable to alloc MP resp bd\n");633 bnx2fc_free_mp_resc(io_req);634 return FAILED;635 }636 /* Fill bd table */637 addr = mp_req->req_buf_dma;638 mp_req_bd = mp_req->mp_req_bd;639 mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff;640 mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32);641 mp_req_bd->buf_len = CNIC_PAGE_SIZE;642 mp_req_bd->flags = 0;643 644 /*645 * MP buffer is either a task mgmt command or an ELS.646 * So the assumption is that it consumes a single bd647 * entry in the bd table648 */649 mp_resp_bd = mp_req->mp_resp_bd;650 addr = mp_req->resp_buf_dma;651 mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff;652 mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32);653 mp_resp_bd->buf_len = CNIC_PAGE_SIZE;654 mp_resp_bd->flags = 0;655 656 return SUCCESS;657}658 659static int bnx2fc_initiate_tmf(struct fc_lport *lport, struct fc_rport *rport,660 u64 tm_lun, u8 tm_flags)661{662 struct fc_rport_libfc_priv *rp;663 struct fcoe_port *port;664 struct bnx2fc_interface *interface;665 struct bnx2fc_rport *tgt;666 struct bnx2fc_cmd *io_req;667 struct bnx2fc_mp_req *tm_req;668 struct fcoe_task_ctx_entry *task;669 struct fcoe_task_ctx_entry *task_page;670 struct fc_frame_header *fc_hdr;671 struct fcp_cmnd *fcp_cmnd;672 int task_idx, index;673 int rc = SUCCESS;674 u16 xid;675 u32 sid, did;676 unsigned long start = jiffies;677 678 port = lport_priv(lport);679 interface = port->priv;680 681 if (rport == NULL) {682 printk(KERN_ERR PFX "device_reset: rport is NULL\n");683 rc = FAILED;684 goto tmf_err;685 }686 rp = rport->dd_data;687 688 rc = fc_block_rport(rport);689 if (rc)690 return rc;691 692 if (lport->state != LPORT_ST_READY || !(lport->link_up)) {693 printk(KERN_ERR PFX "device_reset: link is not ready\n");694 rc = FAILED;695 goto tmf_err;696 }697 /* rport and tgt are allocated together, so tgt should be non-NULL */698 tgt = (struct bnx2fc_rport *)&rp[1];699 700 if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) {701 printk(KERN_ERR PFX "device_reset: tgt not offloaded\n");702 rc = FAILED;703 goto tmf_err;704 }705retry_tmf:706 io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD);707 if (!io_req) {708 if (time_after(jiffies, start + HZ)) {709 printk(KERN_ERR PFX "tmf: Failed TMF");710 rc = FAILED;711 goto tmf_err;712 }713 msleep(20);714 goto retry_tmf;715 }716 /* Initialize rest of io_req fields */717 io_req->sc_cmd = NULL;718 io_req->port = port;719 io_req->tgt = tgt;720 721 tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req);722 723 rc = bnx2fc_init_mp_req(io_req);724 if (rc == FAILED) {725 printk(KERN_ERR PFX "Task mgmt MP request init failed\n");726 spin_lock_bh(&tgt->tgt_lock);727 kref_put(&io_req->refcount, bnx2fc_cmd_release);728 spin_unlock_bh(&tgt->tgt_lock);729 goto tmf_err;730 }731 732 /* Set TM flags */733 io_req->io_req_flags = 0;734 tm_req->tm_flags = tm_flags;735 tm_req->tm_lun = tm_lun;736 737 /* Fill FCP_CMND */738 bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf);739 fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf;740 int_to_scsilun(tm_lun, &fcp_cmnd->fc_lun);741 memset(fcp_cmnd->fc_cdb, 0, BNX2FC_MAX_CMD_LEN);742 fcp_cmnd->fc_dl = 0;743 744 /* Fill FC header */745 fc_hdr = &(tm_req->req_fc_hdr);746 sid = tgt->sid;747 did = rport->port_id;748 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid,749 FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |750 FC_FC_SEQ_INIT, 0);751 /* Obtain exchange id */752 xid = io_req->xid;753 754 BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid);755 task_idx = xid/BNX2FC_TASKS_PER_PAGE;756 index = xid % BNX2FC_TASKS_PER_PAGE;757 758 /* Initialize task context for this IO request */759 task_page = (struct fcoe_task_ctx_entry *)760 interface->hba->task_ctx[task_idx];761 task = &(task_page[index]);762 bnx2fc_init_mp_task(io_req, task);763 764 /* Obtain free SQ entry */765 spin_lock_bh(&tgt->tgt_lock);766 bnx2fc_add_2_sq(tgt, xid);767 768 /* Enqueue the io_req to active_tm_queue */769 io_req->on_tmf_queue = 1;770 list_add_tail(&io_req->link, &tgt->active_tm_queue);771 772 init_completion(&io_req->abts_done);773 io_req->wait_for_abts_comp = 1;774 775 /* Ring doorbell */776 bnx2fc_ring_doorbell(tgt);777 spin_unlock_bh(&tgt->tgt_lock);778 779 rc = wait_for_completion_timeout(&io_req->abts_done,780 interface->tm_timeout * HZ);781 spin_lock_bh(&tgt->tgt_lock);782 783 io_req->wait_for_abts_comp = 0;784 if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) {785 set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags);786 if (io_req->on_tmf_queue) {787 list_del_init(&io_req->link);788 io_req->on_tmf_queue = 0;789 }790 io_req->wait_for_cleanup_comp = 1;791 init_completion(&io_req->cleanup_done);792 bnx2fc_initiate_cleanup(io_req);793 spin_unlock_bh(&tgt->tgt_lock);794 rc = wait_for_completion_timeout(&io_req->cleanup_done,795 BNX2FC_FW_TIMEOUT);796 spin_lock_bh(&tgt->tgt_lock);797 io_req->wait_for_cleanup_comp = 0;798 if (!rc)799 kref_put(&io_req->refcount, bnx2fc_cmd_release);800 }801 802 spin_unlock_bh(&tgt->tgt_lock);803 804 if (!rc) {805 BNX2FC_TGT_DBG(tgt, "task mgmt command failed...\n");806 rc = FAILED;807 } else {808 BNX2FC_TGT_DBG(tgt, "task mgmt command success...\n");809 rc = SUCCESS;810 }811tmf_err:812 return rc;813}814 815int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req)816{817 struct fc_lport *lport;818 struct bnx2fc_rport *tgt = io_req->tgt;819 struct fc_rport *rport = tgt->rport;820 struct fc_rport_priv *rdata = tgt->rdata;821 struct bnx2fc_interface *interface;822 struct fcoe_port *port;823 struct bnx2fc_cmd *abts_io_req;824 struct fcoe_task_ctx_entry *task;825 struct fcoe_task_ctx_entry *task_page;826 struct fc_frame_header *fc_hdr;827 struct bnx2fc_mp_req *abts_req;828 int task_idx, index;829 u32 sid, did;830 u16 xid;831 int rc = SUCCESS;832 u32 r_a_tov = rdata->r_a_tov;833 834 /* called with tgt_lock held */835 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n");836 837 port = io_req->port;838 interface = port->priv;839 lport = port->lport;840 841 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {842 printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n");843 rc = FAILED;844 goto abts_err;845 }846 847 if (rport == NULL) {848 printk(KERN_ERR PFX "initiate_abts: rport is NULL\n");849 rc = FAILED;850 goto abts_err;851 }852 853 if (lport->state != LPORT_ST_READY || !(lport->link_up)) {854 printk(KERN_ERR PFX "initiate_abts: link is not ready\n");855 rc = FAILED;856 goto abts_err;857 }858 859 abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS);860 if (!abts_io_req) {861 printk(KERN_ERR PFX "abts: couldn't allocate cmd\n");862 rc = FAILED;863 goto abts_err;864 }865 866 /* Initialize rest of io_req fields */867 abts_io_req->sc_cmd = NULL;868 abts_io_req->port = port;869 abts_io_req->tgt = tgt;870 abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */871 872 abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req);873 memset(abts_req, 0, sizeof(struct bnx2fc_mp_req));874 875 /* Fill FC header */876 fc_hdr = &(abts_req->req_fc_hdr);877 878 /* Obtain oxid and rxid for the original exchange to be aborted */879 fc_hdr->fh_ox_id = htons(io_req->xid);880 fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id);881 882 sid = tgt->sid;883 did = rport->port_id;884 885 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid,886 FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |887 FC_FC_SEQ_INIT, 0);888 889 xid = abts_io_req->xid;890 BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n");891 task_idx = xid/BNX2FC_TASKS_PER_PAGE;892 index = xid % BNX2FC_TASKS_PER_PAGE;893 894 /* Initialize task context for this IO request */895 task_page = (struct fcoe_task_ctx_entry *)896 interface->hba->task_ctx[task_idx];897 task = &(task_page[index]);898 bnx2fc_init_mp_task(abts_io_req, task);899 900 /*901 * ABTS task is a temporary task that will be cleaned up902 * irrespective of ABTS response. We need to start the timer903 * for the original exchange, as the CQE is posted for the original904 * IO request.905 *906 * Timer for ABTS is started only when it is originated by a907 * TM request. For the ABTS issued as part of ULP timeout,908 * scsi-ml maintains the timers.909 */910 911 /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/912 bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov);913 914 /* Obtain free SQ entry */915 bnx2fc_add_2_sq(tgt, xid);916 917 /* Ring doorbell */918 bnx2fc_ring_doorbell(tgt);919 920abts_err:921 return rc;922}923 924int bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd *orig_io_req, u32 offset,925 enum fc_rctl r_ctl)926{927 struct bnx2fc_rport *tgt = orig_io_req->tgt;928 struct bnx2fc_interface *interface;929 struct fcoe_port *port;930 struct bnx2fc_cmd *seq_clnp_req;931 struct fcoe_task_ctx_entry *task;932 struct fcoe_task_ctx_entry *task_page;933 struct bnx2fc_els_cb_arg *cb_arg = NULL;934 int task_idx, index;935 u16 xid;936 int rc = 0;937 938 BNX2FC_IO_DBG(orig_io_req, "bnx2fc_initiate_seq_cleanup xid = 0x%x\n",939 orig_io_req->xid);940 kref_get(&orig_io_req->refcount);941 942 port = orig_io_req->port;943 interface = port->priv;944 945 cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);946 if (!cb_arg) {947 printk(KERN_ERR PFX "Unable to alloc cb_arg for seq clnup\n");948 rc = -ENOMEM;949 goto cleanup_err;950 }951 952 seq_clnp_req = bnx2fc_elstm_alloc(tgt, BNX2FC_SEQ_CLEANUP);953 if (!seq_clnp_req) {954 printk(KERN_ERR PFX "cleanup: couldn't allocate cmd\n");955 rc = -ENOMEM;956 kfree(cb_arg);957 goto cleanup_err;958 }959 /* Initialize rest of io_req fields */960 seq_clnp_req->sc_cmd = NULL;961 seq_clnp_req->port = port;962 seq_clnp_req->tgt = tgt;963 seq_clnp_req->data_xfer_len = 0; /* No data transfer for cleanup */964 965 xid = seq_clnp_req->xid;966 967 task_idx = xid/BNX2FC_TASKS_PER_PAGE;968 index = xid % BNX2FC_TASKS_PER_PAGE;969 970 /* Initialize task context for this IO request */971 task_page = (struct fcoe_task_ctx_entry *)972 interface->hba->task_ctx[task_idx];973 task = &(task_page[index]);974 cb_arg->aborted_io_req = orig_io_req;975 cb_arg->io_req = seq_clnp_req;976 cb_arg->r_ctl = r_ctl;977 cb_arg->offset = offset;978 seq_clnp_req->cb_arg = cb_arg;979 980 printk(KERN_ERR PFX "call init_seq_cleanup_task\n");981 bnx2fc_init_seq_cleanup_task(seq_clnp_req, task, orig_io_req, offset);982 983 /* Obtain free SQ entry */984 bnx2fc_add_2_sq(tgt, xid);985 986 /* Ring doorbell */987 bnx2fc_ring_doorbell(tgt);988cleanup_err:989 return rc;990}991 992int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req)993{994 struct bnx2fc_rport *tgt = io_req->tgt;995 struct bnx2fc_interface *interface;996 struct fcoe_port *port;997 struct bnx2fc_cmd *cleanup_io_req;998 struct fcoe_task_ctx_entry *task;999 struct fcoe_task_ctx_entry *task_page;1000 int task_idx, index;1001 u16 xid, orig_xid;1002 int rc = 0;1003 1004 /* ASSUMPTION: called with tgt_lock held */1005 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n");1006 1007 port = io_req->port;1008 interface = port->priv;1009 1010 cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP);1011 if (!cleanup_io_req) {1012 printk(KERN_ERR PFX "cleanup: couldn't allocate cmd\n");1013 rc = -1;1014 goto cleanup_err;1015 }1016 1017 /* Initialize rest of io_req fields */1018 cleanup_io_req->sc_cmd = NULL;1019 cleanup_io_req->port = port;1020 cleanup_io_req->tgt = tgt;1021 cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */1022 1023 xid = cleanup_io_req->xid;1024 1025 task_idx = xid/BNX2FC_TASKS_PER_PAGE;1026 index = xid % BNX2FC_TASKS_PER_PAGE;1027 1028 /* Initialize task context for this IO request */1029 task_page = (struct fcoe_task_ctx_entry *)1030 interface->hba->task_ctx[task_idx];1031 task = &(task_page[index]);1032 orig_xid = io_req->xid;1033 1034 BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid);1035 1036 bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid);1037 1038 /* Obtain free SQ entry */1039 bnx2fc_add_2_sq(tgt, xid);1040 1041 /* Set flag that cleanup request is pending with the firmware */1042 set_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags);1043 1044 /* Ring doorbell */1045 bnx2fc_ring_doorbell(tgt);1046 1047cleanup_err:1048 return rc;1049}1050 1051/**1052 * bnx2fc_eh_target_reset: Reset a target1053 *1054 * @sc_cmd: SCSI command1055 *1056 * Set from SCSI host template to send task mgmt command to the target1057 * and wait for the response1058 */1059int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd)1060{1061 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));1062 struct fc_lport *lport = shost_priv(rport_to_shost(rport));1063 1064 return bnx2fc_initiate_tmf(lport, rport, 0, FCP_TMF_TGT_RESET);1065}1066 1067/**1068 * bnx2fc_eh_device_reset - Reset a single LUN1069 *1070 * @sc_cmd: SCSI command1071 *1072 * Set from SCSI host template to send task mgmt command to the target1073 * and wait for the response1074 */1075int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd)1076{1077 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));1078 struct fc_lport *lport = shost_priv(rport_to_shost(rport));1079 1080 return bnx2fc_initiate_tmf(lport, rport, sc_cmd->device->lun,1081 FCP_TMF_LUN_RESET);1082}1083 1084static int bnx2fc_abts_cleanup(struct bnx2fc_cmd *io_req)1085 __must_hold(&tgt->tgt_lock)1086{1087 struct bnx2fc_rport *tgt = io_req->tgt;1088 unsigned int time_left;1089 1090 init_completion(&io_req->cleanup_done);1091 io_req->wait_for_cleanup_comp = 1;1092 bnx2fc_initiate_cleanup(io_req);1093 1094 spin_unlock_bh(&tgt->tgt_lock);1095 1096 /*1097 * Can't wait forever on cleanup response lest we let the SCSI error1098 * handler wait forever1099 */1100 time_left = wait_for_completion_timeout(&io_req->cleanup_done,1101 BNX2FC_FW_TIMEOUT);1102 if (!time_left) {1103 BNX2FC_IO_DBG(io_req, "%s(): Wait for cleanup timed out.\n",1104 __func__);1105 1106 /*1107 * Put the extra reference to the SCSI command since it would1108 * not have been returned in this case.1109 */1110 kref_put(&io_req->refcount, bnx2fc_cmd_release);1111 }1112 1113 spin_lock_bh(&tgt->tgt_lock);1114 io_req->wait_for_cleanup_comp = 0;1115 return SUCCESS;1116}1117 1118/**1119 * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding1120 * SCSI command1121 *1122 * @sc_cmd: SCSI_ML command pointer1123 *1124 * SCSI abort request handler1125 */1126int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)1127{1128 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));1129 struct fc_rport_libfc_priv *rp = rport->dd_data;1130 struct bnx2fc_cmd *io_req;1131 struct fc_lport *lport;1132 struct bnx2fc_rport *tgt;1133 int rc;1134 unsigned int time_left;1135 1136 rc = fc_block_scsi_eh(sc_cmd);1137 if (rc)1138 return rc;1139 1140 lport = shost_priv(sc_cmd->device->host);1141 if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {1142 printk(KERN_ERR PFX "eh_abort: link not ready\n");1143 return FAILED;1144 }1145 1146 tgt = (struct bnx2fc_rport *)&rp[1];1147 1148 BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n");1149 1150 spin_lock_bh(&tgt->tgt_lock);1151 io_req = bnx2fc_priv(sc_cmd)->io_req;1152 if (!io_req) {1153 /* Command might have just completed */1154 printk(KERN_ERR PFX "eh_abort: io_req is NULL\n");1155 spin_unlock_bh(&tgt->tgt_lock);1156 return SUCCESS;1157 }1158 BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n",1159 kref_read(&io_req->refcount));1160 1161 /* Hold IO request across abort processing */1162 kref_get(&io_req->refcount);1163 1164 BUG_ON(tgt != io_req->tgt);1165 1166 /* Remove the io_req from the active_q. */1167 /*1168 * Task Mgmt functions (LUN RESET & TGT RESET) will not1169 * issue an ABTS on this particular IO req, as the1170 * io_req is no longer in the active_q.1171 */1172 if (tgt->flush_in_prog) {1173 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "1174 "flush in progress\n", io_req->xid);1175 kref_put(&io_req->refcount, bnx2fc_cmd_release);1176 spin_unlock_bh(&tgt->tgt_lock);1177 return SUCCESS;1178 }1179 1180 if (io_req->on_active_queue == 0) {1181 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "1182 "not on active_q\n", io_req->xid);1183 /*1184 * The IO is still with the FW.1185 * Return failure and let SCSI-ml retry eh_abort.1186 */1187 spin_unlock_bh(&tgt->tgt_lock);1188 return FAILED;1189 }1190 1191 /*1192 * Only eh_abort processing will remove the IO from1193 * active_cmd_q before processing the request. this is1194 * done to avoid race conditions between IOs aborted1195 * as part of task management completion and eh_abort1196 * processing1197 */1198 list_del_init(&io_req->link);1199 io_req->on_active_queue = 0;1200 /* Move IO req to retire queue */1201 list_add_tail(&io_req->link, &tgt->io_retire_queue);1202 1203 init_completion(&io_req->abts_done);1204 init_completion(&io_req->cleanup_done);1205 1206 if (test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {1207 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "1208 "already in abts processing\n", io_req->xid);1209 if (cancel_delayed_work(&io_req->timeout_work))1210 kref_put(&io_req->refcount,1211 bnx2fc_cmd_release); /* drop timer hold */1212 /*1213 * We don't want to hold off the upper layer timer so simply1214 * cleanup the command and return that I/O was successfully1215 * aborted.1216 */1217 bnx2fc_abts_cleanup(io_req);1218 /* This only occurs when an task abort was requested while ABTS1219 is in progress. Setting the IO_CLEANUP flag will skip the1220 RRQ process in the case when the fw generated SCSI_CMD cmpl1221 was a result from the ABTS request rather than the CLEANUP1222 request */1223 set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags);1224 rc = FAILED;1225 goto done;1226 }1227 1228 /* Cancel the current timer running on this io_req */1229 if (cancel_delayed_work(&io_req->timeout_work))1230 kref_put(&io_req->refcount,1231 bnx2fc_cmd_release); /* drop timer hold */1232 set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags);1233 io_req->wait_for_abts_comp = 1;1234 rc = bnx2fc_initiate_abts(io_req);1235 if (rc == FAILED) {1236 io_req->wait_for_cleanup_comp = 1;1237 bnx2fc_initiate_cleanup(io_req);1238 spin_unlock_bh(&tgt->tgt_lock);1239 wait_for_completion(&io_req->cleanup_done);1240 spin_lock_bh(&tgt->tgt_lock);1241 io_req->wait_for_cleanup_comp = 0;1242 goto done;1243 }1244 spin_unlock_bh(&tgt->tgt_lock);1245 1246 /* Wait 2 * RA_TOV + 1 to be sure timeout function hasn't fired */1247 time_left = wait_for_completion_timeout(&io_req->abts_done,1248 msecs_to_jiffies(2 * rp->r_a_tov + 1));1249 if (time_left)1250 BNX2FC_IO_DBG(io_req,1251 "Timed out in eh_abort waiting for abts_done");1252 1253 spin_lock_bh(&tgt->tgt_lock);1254 io_req->wait_for_abts_comp = 0;1255 if (test_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) {1256 BNX2FC_IO_DBG(io_req, "IO completed in a different context\n");1257 rc = SUCCESS;1258 } else if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,1259 &io_req->req_flags))) {1260 /* Let the scsi-ml try to recover this command */1261 printk(KERN_ERR PFX "abort failed, xid = 0x%x\n",1262 io_req->xid);1263 /*1264 * Cleanup firmware residuals before returning control back1265 * to SCSI ML.1266 */1267 rc = bnx2fc_abts_cleanup(io_req);1268 goto done;1269 } else {1270 /*1271 * We come here even when there was a race condition1272 * between timeout and abts completion, and abts1273 * completion happens just in time.1274 */1275 BNX2FC_IO_DBG(io_req, "abort succeeded\n");1276 rc = SUCCESS;1277 bnx2fc_scsi_done(io_req, DID_ABORT);1278 kref_put(&io_req->refcount, bnx2fc_cmd_release);1279 }1280done:1281 /* release the reference taken in eh_abort */1282 kref_put(&io_req->refcount, bnx2fc_cmd_release);1283 spin_unlock_bh(&tgt->tgt_lock);1284 return rc;1285}1286 1287void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnp_req,1288 struct fcoe_task_ctx_entry *task,1289 u8 rx_state)1290{1291 struct bnx2fc_els_cb_arg *cb_arg = seq_clnp_req->cb_arg;1292 struct bnx2fc_cmd *orig_io_req = cb_arg->aborted_io_req;1293 u32 offset = cb_arg->offset;1294 enum fc_rctl r_ctl = cb_arg->r_ctl;1295 int rc = 0;1296 struct bnx2fc_rport *tgt = orig_io_req->tgt;1297 1298 BNX2FC_IO_DBG(orig_io_req, "Entered process_cleanup_compl xid = 0x%x"1299 "cmd_type = %d\n",1300 seq_clnp_req->xid, seq_clnp_req->cmd_type);1301 1302 if (rx_state == FCOE_TASK_RX_STATE_IGNORED_SEQUENCE_CLEANUP) {1303 printk(KERN_ERR PFX "seq cleanup ignored - xid = 0x%x\n",1304 seq_clnp_req->xid);1305 goto free_cb_arg;1306 }1307 1308 spin_unlock_bh(&tgt->tgt_lock);1309 rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl);1310 spin_lock_bh(&tgt->tgt_lock);1311 1312 if (rc)1313 printk(KERN_ERR PFX "clnup_compl: Unable to send SRR"1314 " IO will abort\n");1315 seq_clnp_req->cb_arg = NULL;1316 kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);1317free_cb_arg:1318 kfree(cb_arg);1319 return;1320}1321 1322void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req,1323 struct fcoe_task_ctx_entry *task,1324 u8 num_rq)1325{1326 BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl "1327 "refcnt = %d, cmd_type = %d\n",1328 kref_read(&io_req->refcount), io_req->cmd_type);1329 /*1330 * Test whether there is a cleanup request pending. If not just1331 * exit.1332 */1333 if (!test_and_clear_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ,1334 &io_req->req_flags))1335 return;1336 /*1337 * If we receive a cleanup completion for this request then the1338 * firmware will not give us an abort completion for this request1339 * so clear any ABTS pending flags.1340 */1341 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags) &&1342 !test_bit(BNX2FC_FLAG_ABTS_DONE, &io_req->req_flags)) {1343 set_bit(BNX2FC_FLAG_ABTS_DONE, &io_req->req_flags);1344 if (io_req->wait_for_abts_comp)1345 complete(&io_req->abts_done);1346 }1347 1348 bnx2fc_scsi_done(io_req, DID_ERROR);1349 kref_put(&io_req->refcount, bnx2fc_cmd_release);1350 if (io_req->wait_for_cleanup_comp)1351 complete(&io_req->cleanup_done);1352}1353 1354void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req,1355 struct fcoe_task_ctx_entry *task,1356 u8 num_rq)1357{1358 u32 r_ctl;1359 u32 r_a_tov = FC_DEF_R_A_TOV;1360 u8 issue_rrq = 0;1361 struct bnx2fc_rport *tgt = io_req->tgt;1362 1363 BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x"1364 "refcnt = %d, cmd_type = %d\n",1365 io_req->xid,1366 kref_read(&io_req->refcount), io_req->cmd_type);1367 1368 if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE,1369 &io_req->req_flags)) {1370 BNX2FC_IO_DBG(io_req, "Timer context finished processing"1371 " this io\n");1372 return;1373 }1374 1375 /*1376 * If we receive an ABTS completion here then we will not receive1377 * a cleanup completion so clear any cleanup pending flags.1378 */1379 if (test_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags)) {1380 clear_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags);1381 if (io_req->wait_for_cleanup_comp)1382 complete(&io_req->cleanup_done);1383 }1384 1385 /* Do not issue RRQ as this IO is already cleanedup */1386 if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP,1387 &io_req->req_flags))1388 goto io_compl;1389 1390 /*1391 * For ABTS issued due to SCSI eh_abort_handler, timeout1392 * values are maintained by scsi-ml itself. Cancel timeout1393 * in case ABTS issued as part of task management function1394 * or due to FW error.1395 */1396 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))1397 if (cancel_delayed_work(&io_req->timeout_work))1398 kref_put(&io_req->refcount,1399 bnx2fc_cmd_release); /* drop timer hold */1400 1401 r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl;1402 1403 switch (r_ctl) {1404 case FC_RCTL_BA_ACC:1405 /*1406 * Dont release this cmd yet. It will be relesed1407 * after we get RRQ response1408 */1409 BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n");1410 issue_rrq = 1;1411 break;1412 1413 case FC_RCTL_BA_RJT:1414 BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n");1415 break;1416 default:1417 printk(KERN_ERR PFX "Unknown ABTS response\n");1418 break;1419 }1420 1421 if (issue_rrq) {1422 BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n");1423 set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags);1424 }1425 set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags);1426 bnx2fc_cmd_timer_set(io_req, r_a_tov);1427 1428io_compl:1429 if (io_req->wait_for_abts_comp) {1430 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,1431 &io_req->req_flags))1432 complete(&io_req->abts_done);1433 } else {1434 /*1435 * We end up here when ABTS is issued as1436 * in asynchronous context, i.e., as part1437 * of task management completion, or1438 * when FW error is received or when the1439 * ABTS is issued when the IO is timed1440 * out.1441 */1442 1443 if (io_req->on_active_queue) {1444 list_del_init(&io_req->link);1445 io_req->on_active_queue = 0;1446 /* Move IO req to retire queue */1447 list_add_tail(&io_req->link, &tgt->io_retire_queue);1448 }1449 bnx2fc_scsi_done(io_req, DID_ERROR);1450 kref_put(&io_req->refcount, bnx2fc_cmd_release);1451 }1452}1453 1454static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req)1455{1456 struct bnx2fc_rport *tgt = io_req->tgt;1457 struct bnx2fc_cmd *cmd, *tmp;1458 struct bnx2fc_mp_req *tm_req = &io_req->mp_req;1459 u64 lun;1460 int rc = 0;1461 1462 /* called with tgt_lock held */1463 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n");1464 /*1465 * Walk thru the active_ios queue and ABORT the IO1466 * that matches with the LUN that was reset1467 */1468 list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {1469 BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n");1470 if (!cmd->sc_cmd)1471 continue;1472 lun = cmd->sc_cmd->device->lun;1473 if (lun == tm_req->tm_lun) {1474 /* Initiate ABTS on this cmd */1475 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,1476 &cmd->req_flags)) {1477 /* cancel the IO timeout */1478 if (cancel_delayed_work(&io_req->timeout_work))1479 kref_put(&io_req->refcount,1480 bnx2fc_cmd_release);1481 /* timer hold */1482 rc = bnx2fc_initiate_abts(cmd);1483 /* abts shouldn't fail in this context */1484 WARN_ON(rc != SUCCESS);1485 } else1486 printk(KERN_ERR PFX "lun_rst: abts already in"1487 " progress for this IO 0x%x\n",1488 cmd->xid);1489 }1490 }1491}1492 1493static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req)1494{1495 struct bnx2fc_rport *tgt = io_req->tgt;1496 struct bnx2fc_cmd *cmd, *tmp;1497 int rc = 0;1498 1499 /* called with tgt_lock held */1500 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n");1501 /*1502 * Walk thru the active_ios queue and ABORT the IO1503 * that matches with the LUN that was reset1504 */1505 list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {1506 BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n");1507 /* Initiate ABTS */1508 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,1509 &cmd->req_flags)) {1510 /* cancel the IO timeout */1511 if (cancel_delayed_work(&io_req->timeout_work))1512 kref_put(&io_req->refcount,1513 bnx2fc_cmd_release); /* timer hold */1514 rc = bnx2fc_initiate_abts(cmd);1515 /* abts shouldn't fail in this context */1516 WARN_ON(rc != SUCCESS);1517 1518 } else1519 printk(KERN_ERR PFX "tgt_rst: abts already in progress"1520 " for this IO 0x%x\n", cmd->xid);1521 }1522}1523 1524void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req,1525 struct fcoe_task_ctx_entry *task, u8 num_rq,1526 unsigned char *rq_data)1527{1528 struct bnx2fc_mp_req *tm_req;1529 struct fc_frame_header *fc_hdr;1530 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;1531 u64 *hdr;1532 u64 *temp_hdr;1533 void *rsp_buf;1534 1535 /* Called with tgt_lock held */1536 BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n");1537 1538 if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags)))1539 set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags);1540 else {1541 /* TM has already timed out and we got1542 * delayed completion. Ignore completion1543 * processing.1544 */1545 return;1546 }1547 1548 tm_req = &(io_req->mp_req);1549 fc_hdr = &(tm_req->resp_fc_hdr);1550 hdr = (u64 *)fc_hdr;1551 temp_hdr = (u64 *)1552 &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr;1553 hdr[0] = cpu_to_be64(temp_hdr[0]);1554 hdr[1] = cpu_to_be64(temp_hdr[1]);1555 hdr[2] = cpu_to_be64(temp_hdr[2]);1556 1557 tm_req->resp_len =1558 task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len;1559 1560 rsp_buf = tm_req->resp_buf;1561 1562 if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) {1563 bnx2fc_parse_fcp_rsp(io_req,1564 (struct fcoe_fcp_rsp_payload *)1565 rsp_buf, num_rq, rq_data);1566 if (io_req->fcp_rsp_code == 0) {1567 /* TM successful */1568 if (tm_req->tm_flags & FCP_TMF_LUN_RESET)1569 bnx2fc_lun_reset_cmpl(io_req);1570 else if (tm_req->tm_flags & FCP_TMF_TGT_RESET)1571 bnx2fc_tgt_reset_cmpl(io_req);1572 }1573 } else {1574 printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n",1575 fc_hdr->fh_r_ctl);1576 }1577 if (sc_cmd) {1578 if (!bnx2fc_priv(sc_cmd)->io_req) {1579 printk(KERN_ERR PFX "tm_compl: io_req is NULL\n");1580 return;1581 }1582 switch (io_req->fcp_status) {1583 case FC_GOOD:1584 if (io_req->cdb_status == 0) {1585 /* Good IO completion */1586 sc_cmd->result = DID_OK << 16;1587 } else {1588 /* Transport status is good, SCSI status not good */1589 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;1590 }1591 if (io_req->fcp_resid)1592 scsi_set_resid(sc_cmd, io_req->fcp_resid);1593 break;1594 1595 default:1596 BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n",1597 io_req->fcp_status);1598 break;1599 }1600 1601 sc_cmd = io_req->sc_cmd;1602 io_req->sc_cmd = NULL;1603 1604 bnx2fc_priv(sc_cmd)->io_req = NULL;1605 scsi_done(sc_cmd);1606 }1607 1608 /* check if the io_req exists in tgt's tmf_q */1609 if (io_req->on_tmf_queue) {1610 1611 list_del_init(&io_req->link);1612 io_req->on_tmf_queue = 0;1613 } else {1614 1615 printk(KERN_ERR PFX "Command not on active_cmd_queue!\n");1616 return;1617 }1618 1619 kref_put(&io_req->refcount, bnx2fc_cmd_release);1620 if (io_req->wait_for_abts_comp) {1621 BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n");1622 complete(&io_req->abts_done);1623 }1624}1625 1626static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,1627 int bd_index)1628{1629 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;1630 int frag_size, sg_frags;1631 1632 sg_frags = 0;1633 while (sg_len) {1634 if (sg_len >= BNX2FC_BD_SPLIT_SZ)1635 frag_size = BNX2FC_BD_SPLIT_SZ;1636 else1637 frag_size = sg_len;1638 bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff;1639 bd[bd_index + sg_frags].buf_addr_hi = addr >> 32;1640 bd[bd_index + sg_frags].buf_len = (u16)frag_size;1641 bd[bd_index + sg_frags].flags = 0;1642 1643 addr += (u64) frag_size;1644 sg_frags++;1645 sg_len -= frag_size;1646 }1647 return sg_frags;1648 1649}1650 1651static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req)1652{1653 struct bnx2fc_interface *interface = io_req->port->priv;1654 struct bnx2fc_hba *hba = interface->hba;1655 struct scsi_cmnd *sc = io_req->sc_cmd;1656 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;1657 struct scatterlist *sg;1658 int byte_count = 0;1659 int sg_count = 0;1660 int bd_count = 0;1661 int sg_frags;1662 unsigned int sg_len;1663 u64 addr;1664 int i;1665 1666 WARN_ON(scsi_sg_count(sc) > BNX2FC_MAX_BDS_PER_CMD);1667 /*1668 * Use dma_map_sg directly to ensure we're using the correct1669 * dev struct off of pcidev.1670 */1671 sg_count = dma_map_sg(&hba->pcidev->dev, scsi_sglist(sc),1672 scsi_sg_count(sc), sc->sc_data_direction);1673 scsi_for_each_sg(sc, sg, sg_count, i) {1674 sg_len = sg_dma_len(sg);1675 addr = sg_dma_address(sg);1676 if (sg_len > BNX2FC_MAX_BD_LEN) {1677 sg_frags = bnx2fc_split_bd(io_req, addr, sg_len,1678 bd_count);1679 } else {1680 1681 sg_frags = 1;1682 bd[bd_count].buf_addr_lo = addr & 0xffffffff;1683 bd[bd_count].buf_addr_hi = addr >> 32;1684 bd[bd_count].buf_len = (u16)sg_len;1685 bd[bd_count].flags = 0;1686 }1687 bd_count += sg_frags;1688 byte_count += sg_len;1689 }1690 if (byte_count != scsi_bufflen(sc))1691 printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, "1692 "task_id = 0x%x\n", byte_count, scsi_bufflen(sc),1693 io_req->xid);1694 return bd_count;1695}1696 1697static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req)1698{1699 struct scsi_cmnd *sc = io_req->sc_cmd;1700 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl;1701 int bd_count;1702 1703 if (scsi_sg_count(sc)) {1704 bd_count = bnx2fc_map_sg(io_req);1705 if (bd_count == 0)1706 return -ENOMEM;1707 } else {1708 bd_count = 0;1709 bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0;1710 bd[0].buf_len = bd[0].flags = 0;1711 }1712 io_req->bd_tbl->bd_valid = bd_count;1713 1714 /*1715 * Return the command to ML if BD count exceeds the max number1716 * that can be handled by FW.1717 */1718 if (bd_count > BNX2FC_FW_MAX_BDS_PER_CMD) {1719 pr_err("bd_count = %d exceeded FW supported max BD(255), task_id = 0x%x\n",1720 bd_count, io_req->xid);1721 return -ENOMEM;1722 }1723 1724 return 0;1725}1726 1727static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req)1728{1729 struct scsi_cmnd *sc = io_req->sc_cmd;1730 struct bnx2fc_interface *interface = io_req->port->priv;1731 struct bnx2fc_hba *hba = interface->hba;1732 1733 /*1734 * Use dma_unmap_sg directly to ensure we're using the correct1735 * dev struct off of pcidev.1736 */1737 if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) {1738 dma_unmap_sg(&hba->pcidev->dev, scsi_sglist(sc),1739 scsi_sg_count(sc), sc->sc_data_direction);1740 io_req->bd_tbl->bd_valid = 0;1741 }1742}1743 1744void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req,1745 struct fcp_cmnd *fcp_cmnd)1746{1747 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));1748 1749 fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len);1750 fcp_cmnd->fc_cmdref = 0;1751 fcp_cmnd->fc_pri_ta = 0;1752 fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags;1753 fcp_cmnd->fc_flags = io_req->io_req_flags;1754 fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE;1755}1756 1757static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,1758 struct fcoe_fcp_rsp_payload *fcp_rsp,1759 u8 num_rq, unsigned char *rq_data)1760{1761 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;1762 u8 rsp_flags = fcp_rsp->fcp_flags.flags;1763 u32 rq_buff_len = 0;1764 int fcp_sns_len = 0;1765 int fcp_rsp_len = 0;1766 1767 io_req->fcp_status = FC_GOOD;1768 io_req->fcp_resid = 0;1769 if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER |1770 FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER))1771 io_req->fcp_resid = fcp_rsp->fcp_resid;1772 1773 io_req->scsi_comp_flags = rsp_flags;1774 io_req->cdb_status = fcp_rsp->scsi_status_code;1775 1776 /* Fetch fcp_rsp_info and fcp_sns_info if available */1777 if (num_rq) {1778 1779 /*1780 * We do not anticipate num_rq >1, as the linux defined1781 * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO1782 * 256 bytes of single rq buffer is good enough to hold this.1783 */1784 1785 if (rsp_flags &1786 FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) {1787 fcp_rsp_len = rq_buff_len1788 = fcp_rsp->fcp_rsp_len;1789 }1790 1791 if (rsp_flags &1792 FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) {1793 fcp_sns_len = fcp_rsp->fcp_sns_len;1794 rq_buff_len += fcp_rsp->fcp_sns_len;1795 }1796 1797 io_req->fcp_rsp_len = fcp_rsp_len;1798 io_req->fcp_sns_len = fcp_sns_len;1799 1800 if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) {1801 /* Invalid sense sense length. */1802 printk(KERN_ERR PFX "invalid sns length %d\n",1803 rq_buff_len);1804 /* reset rq_buff_len */1805 rq_buff_len = num_rq * BNX2FC_RQ_BUF_SZ;1806 }1807 1808 /* fetch fcp_rsp_code */1809 if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) {1810 /* Only for task management function */1811 io_req->fcp_rsp_code = rq_data[3];1812 BNX2FC_IO_DBG(io_req, "fcp_rsp_code = %d\n",1813 io_req->fcp_rsp_code);1814 }1815 1816 /* fetch sense data */1817 rq_data += fcp_rsp_len;1818 1819 if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) {1820 printk(KERN_ERR PFX "Truncating sense buffer\n");1821 fcp_sns_len = SCSI_SENSE_BUFFERSIZE;1822 }1823 1824 memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);1825 if (fcp_sns_len)1826 memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len);1827 1828 }1829}1830 1831/**1832 * bnx2fc_queuecommand - Queuecommand function of the scsi template1833 *1834 * @host: The Scsi_Host the command was issued to1835 * @sc_cmd: struct scsi_cmnd to be executed1836 *1837 * This is the IO strategy routine, called by SCSI-ML1838 **/1839int bnx2fc_queuecommand(struct Scsi_Host *host,1840 struct scsi_cmnd *sc_cmd)1841{1842 struct fc_lport *lport = shost_priv(host);1843 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));1844 struct fc_rport_libfc_priv *rp = rport->dd_data;1845 struct bnx2fc_rport *tgt;1846 struct bnx2fc_cmd *io_req;1847 int rc = 0;1848 int rval;1849 1850 rval = fc_remote_port_chkready(rport);1851 if (rval) {1852 sc_cmd->result = rval;1853 scsi_done(sc_cmd);1854 return 0;1855 }1856 1857 if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) {1858 rc = SCSI_MLQUEUE_HOST_BUSY;1859 goto exit_qcmd;1860 }1861 1862 /* rport and tgt are allocated together, so tgt should be non-NULL */1863 tgt = (struct bnx2fc_rport *)&rp[1];1864 1865 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {1866 /*1867 * Session is not offloaded yet. Let SCSI-ml retry1868 * the command.1869 */1870 rc = SCSI_MLQUEUE_TARGET_BUSY;1871 goto exit_qcmd;1872 }1873 if (tgt->retry_delay_timestamp) {1874 if (time_after(jiffies, tgt->retry_delay_timestamp)) {1875 tgt->retry_delay_timestamp = 0;1876 } else {1877 /* If retry_delay timer is active, flow off the ML */1878 rc = SCSI_MLQUEUE_TARGET_BUSY;1879 goto exit_qcmd;1880 }1881 }1882 1883 spin_lock_bh(&tgt->tgt_lock);1884 1885 io_req = bnx2fc_cmd_alloc(tgt);1886 if (!io_req) {1887 rc = SCSI_MLQUEUE_HOST_BUSY;1888 goto exit_qcmd_tgtlock;1889 }1890 io_req->sc_cmd = sc_cmd;1891 1892 if (bnx2fc_post_io_req(tgt, io_req)) {1893 printk(KERN_ERR PFX "Unable to post io_req\n");1894 rc = SCSI_MLQUEUE_HOST_BUSY;1895 goto exit_qcmd_tgtlock;1896 }1897 1898exit_qcmd_tgtlock:1899 spin_unlock_bh(&tgt->tgt_lock);1900exit_qcmd:1901 return rc;1902}1903 1904void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req,1905 struct fcoe_task_ctx_entry *task,1906 u8 num_rq, unsigned char *rq_data)1907{1908 struct fcoe_fcp_rsp_payload *fcp_rsp;1909 struct bnx2fc_rport *tgt = io_req->tgt;1910 struct scsi_cmnd *sc_cmd;1911 u16 scope = 0, qualifier = 0;1912 1913 /* scsi_cmd_cmpl is called with tgt lock held */1914 1915 if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) {1916 /* we will not receive ABTS response for this IO */1917 BNX2FC_IO_DBG(io_req, "Timer context finished processing "1918 "this scsi cmd\n");1919 if (test_and_clear_bit(BNX2FC_FLAG_IO_CLEANUP,1920 &io_req->req_flags)) {1921 BNX2FC_IO_DBG(io_req,1922 "Actual completion after cleanup request cleaning up\n");1923 bnx2fc_process_cleanup_compl(io_req, task, num_rq);1924 }1925 return;1926 }1927 1928 /* Cancel the timeout_work, as we received IO completion */1929 if (cancel_delayed_work(&io_req->timeout_work))1930 kref_put(&io_req->refcount,1931 bnx2fc_cmd_release); /* drop timer hold */1932 1933 sc_cmd = io_req->sc_cmd;1934 if (sc_cmd == NULL) {1935 printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n");1936 return;1937 }1938 1939 /* Fetch fcp_rsp from task context and perform cmd completion */1940 fcp_rsp = (struct fcoe_fcp_rsp_payload *)1941 &(task->rxwr_only.union_ctx.comp_info.fcp_rsp.payload);1942 1943 /* parse fcp_rsp and obtain sense data from RQ if available */1944 bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq, rq_data);1945 1946 if (!bnx2fc_priv(sc_cmd)->io_req) {1947 printk(KERN_ERR PFX "io_req is NULL\n");1948 return;1949 }1950 1951 if (io_req->on_active_queue) {1952 list_del_init(&io_req->link);1953 io_req->on_active_queue = 0;1954 /* Move IO req to retire queue */1955 list_add_tail(&io_req->link, &tgt->io_retire_queue);1956 } else {1957 /* This should not happen, but could have been pulled1958 * by bnx2fc_flush_active_ios(), or during a race1959 * between command abort and (late) completion.1960 */1961 BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n");1962 if (io_req->wait_for_abts_comp)1963 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT,1964 &io_req->req_flags))1965 complete(&io_req->abts_done);1966 }1967 1968 bnx2fc_unmap_sg_list(io_req);1969 io_req->sc_cmd = NULL;1970 1971 switch (io_req->fcp_status) {1972 case FC_GOOD:1973 if (io_req->cdb_status == 0) {1974 /* Good IO completion */1975 sc_cmd->result = DID_OK << 16;1976 } else {1977 /* Transport status is good, SCSI status not good */1978 BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d"1979 " fcp_resid = 0x%x\n",1980 io_req->cdb_status, io_req->fcp_resid);1981 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status;1982 1983 if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL ||1984 io_req->cdb_status == SAM_STAT_BUSY) {1985 /* Newer array firmware with BUSY or1986 * TASK_SET_FULL may return a status that needs1987 * the scope bits masked.1988 * Or a huge delay timestamp up to 27 minutes1989 * can result.1990 */1991 if (fcp_rsp->retry_delay_timer) {1992 /* Upper 2 bits */1993 scope = fcp_rsp->retry_delay_timer1994 & 0xC000;1995 /* Lower 14 bits */1996 qualifier = fcp_rsp->retry_delay_timer1997 & 0x3FFF;1998 }1999 if (scope > 0 && qualifier > 0 &&2000 qualifier <= 0x3FEF) {2001 /* Set the jiffies +2002 * retry_delay_timer * 100ms2003 * for the rport/tgt2004 */2005 tgt->retry_delay_timestamp = jiffies +2006 (qualifier * HZ / 10);2007 }2008 }2009 }2010 if (io_req->fcp_resid)2011 scsi_set_resid(sc_cmd, io_req->fcp_resid);2012 break;2013 default:2014 printk(KERN_ERR PFX "scsi_cmd_compl: fcp_status = %d\n",2015 io_req->fcp_status);2016 break;2017 }2018 bnx2fc_priv(sc_cmd)->io_req = NULL;2019 scsi_done(sc_cmd);2020 kref_put(&io_req->refcount, bnx2fc_cmd_release);2021}2022 2023int bnx2fc_post_io_req(struct bnx2fc_rport *tgt,2024 struct bnx2fc_cmd *io_req)2025{2026 struct fcoe_task_ctx_entry *task;2027 struct fcoe_task_ctx_entry *task_page;2028 struct scsi_cmnd *sc_cmd = io_req->sc_cmd;2029 struct fcoe_port *port = tgt->port;2030 struct bnx2fc_interface *interface = port->priv;2031 struct bnx2fc_hba *hba = interface->hba;2032 struct fc_lport *lport = port->lport;2033 int task_idx, index;2034 u16 xid;2035 2036 /* bnx2fc_post_io_req() is called with the tgt_lock held */2037 2038 /* Initialize rest of io_req fields */2039 io_req->cmd_type = BNX2FC_SCSI_CMD;2040 io_req->port = port;2041 io_req->tgt = tgt;2042 io_req->data_xfer_len = scsi_bufflen(sc_cmd);2043 bnx2fc_priv(sc_cmd)->io_req = io_req;2044 2045 if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) {2046 io_req->io_req_flags = BNX2FC_READ;2047 this_cpu_inc(lport->stats->InputRequests);2048 this_cpu_add(lport->stats->InputBytes, io_req->data_xfer_len);2049 } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {2050 io_req->io_req_flags = BNX2FC_WRITE;2051 this_cpu_inc(lport->stats->OutputRequests);2052 this_cpu_add(lport->stats->OutputBytes, io_req->data_xfer_len);2053 } else {2054 io_req->io_req_flags = 0;2055 this_cpu_inc(lport->stats->ControlRequests);2056 }2057 2058 xid = io_req->xid;2059 2060 /* Build buffer descriptor list for firmware from sg list */2061 if (bnx2fc_build_bd_list_from_sg(io_req)) {2062 printk(KERN_ERR PFX "BD list creation failed\n");2063 kref_put(&io_req->refcount, bnx2fc_cmd_release);2064 return -EAGAIN;2065 }2066 2067 task_idx = xid / BNX2FC_TASKS_PER_PAGE;2068 index = xid % BNX2FC_TASKS_PER_PAGE;2069 2070 /* Initialize task context for this IO request */2071 task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx];2072 task = &(task_page[index]);2073 bnx2fc_init_task(io_req, task);2074 2075 if (tgt->flush_in_prog) {2076 printk(KERN_ERR PFX "Flush in progress..Host Busy\n");2077 kref_put(&io_req->refcount, bnx2fc_cmd_release);2078 return -EAGAIN;2079 }2080 2081 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) {2082 printk(KERN_ERR PFX "Session not ready...post_io\n");2083 kref_put(&io_req->refcount, bnx2fc_cmd_release);2084 return -EAGAIN;2085 }2086 2087 /* Time IO req */2088 if (tgt->io_timeout)2089 bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT);2090 /* Obtain free SQ entry */2091 bnx2fc_add_2_sq(tgt, xid);2092 2093 /* Enqueue the io_req to active_cmd_queue */2094 2095 io_req->on_active_queue = 1;2096 /* move io_req from pending_queue to active_queue */2097 list_add_tail(&io_req->link, &tgt->active_cmd_queue);2098 2099 /* Ring doorbell */2100 bnx2fc_ring_doorbell(tgt);2101 return 0;2102}2103