1 /* bnx2fc_io.c: QLogic Linux FCoE offload driver. 2 * IO manager and SCSI IO processing. 3 * 4 * Copyright (c) 2008-2013 Broadcom Corporation 5 * Copyright (c) 2014-2016 QLogic Corporation 6 * Copyright (c) 2016-2017 Cavium Inc. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * 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 19 static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, 20 int bd_index); 21 static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req); 22 static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req); 23 static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req); 24 static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req); 25 static 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 29 void 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 40 static 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 to 83 * 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 timeout 133 * path. If els compl path is processing this IO, we 134 * have nothing to do here, just release the timer hold 135 */ 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 } 155 156 done: 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 } 161 162 static 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 only 170 * 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 } 210 211 struct 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 list 270 * 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 else 291 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; 330 331 mem_err: 332 bnx2fc_cmd_mgr_free(cmgr); 333 return NULL; 334 } 335 336 void 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; 371 372 free_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); 389 free_cmgr: 390 /* Free command manager itself */ 391 kfree(cmgr); 392 } 393 394 struct 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 with 421 * cmgr lock 422 */ 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 } 463 464 struct 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 with 480 * cmgr lock 481 */ 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 } 516 517 void 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 else 527 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 } 543 544 static 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 } 578 579 int 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 } else 596 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 bd 647 * entry in the bd table 648 */ 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 } 658 659 static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags) 660 { 661 struct fc_lport *lport; 662 struct fc_rport *rport; 663 struct fc_rport_libfc_priv *rp; 664 struct fcoe_port *port; 665 struct bnx2fc_interface *interface; 666 struct bnx2fc_rport *tgt; 667 struct bnx2fc_cmd *io_req; 668 struct bnx2fc_mp_req *tm_req; 669 struct fcoe_task_ctx_entry *task; 670 struct fcoe_task_ctx_entry *task_page; 671 struct Scsi_Host *host = sc_cmd->device->host; 672 struct fc_frame_header *fc_hdr; 673 struct fcp_cmnd *fcp_cmnd; 674 int task_idx, index; 675 int rc = SUCCESS; 676 u16 xid; 677 u32 sid, did; 678 unsigned long start = jiffies; 679 680 lport = shost_priv(host); 681 rport = starget_to_rport(scsi_target(sc_cmd->device)); 682 port = lport_priv(lport); 683 interface = port->priv; 684 685 if (rport == NULL) { 686 printk(KERN_ERR PFX "device_reset: rport is NULL\n"); 687 rc = FAILED; 688 goto tmf_err; 689 } 690 rp = rport->dd_data; 691 692 rc = fc_block_scsi_eh(sc_cmd); 693 if (rc) 694 return rc; 695 696 if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 697 printk(KERN_ERR PFX "device_reset: link is not ready\n"); 698 rc = FAILED; 699 goto tmf_err; 700 } 701 /* rport and tgt are allocated together, so tgt should be non-NULL */ 702 tgt = (struct bnx2fc_rport *)&rp[1]; 703 704 if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) { 705 printk(KERN_ERR PFX "device_reset: tgt not offloaded\n"); 706 rc = FAILED; 707 goto tmf_err; 708 } 709 retry_tmf: 710 io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD); 711 if (!io_req) { 712 if (time_after(jiffies, start + HZ)) { 713 printk(KERN_ERR PFX "tmf: Failed TMF"); 714 rc = FAILED; 715 goto tmf_err; 716 } 717 msleep(20); 718 goto retry_tmf; 719 } 720 /* Initialize rest of io_req fields */ 721 io_req->sc_cmd = sc_cmd; 722 io_req->port = port; 723 io_req->tgt = tgt; 724 725 tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); 726 727 rc = bnx2fc_init_mp_req(io_req); 728 if (rc == FAILED) { 729 printk(KERN_ERR PFX "Task mgmt MP request init failed\n"); 730 spin_lock_bh(&tgt->tgt_lock); 731 kref_put(&io_req->refcount, bnx2fc_cmd_release); 732 spin_unlock_bh(&tgt->tgt_lock); 733 goto tmf_err; 734 } 735 736 /* Set TM flags */ 737 io_req->io_req_flags = 0; 738 tm_req->tm_flags = tm_flags; 739 740 /* Fill FCP_CMND */ 741 bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf); 742 fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf; 743 memset(fcp_cmnd->fc_cdb, 0, sc_cmd->cmd_len); 744 fcp_cmnd->fc_dl = 0; 745 746 /* Fill FC header */ 747 fc_hdr = &(tm_req->req_fc_hdr); 748 sid = tgt->sid; 749 did = rport->port_id; 750 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid, 751 FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | 752 FC_FC_SEQ_INIT, 0); 753 /* Obtain exchange id */ 754 xid = io_req->xid; 755 756 BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid); 757 task_idx = xid/BNX2FC_TASKS_PER_PAGE; 758 index = xid % BNX2FC_TASKS_PER_PAGE; 759 760 /* Initialize task context for this IO request */ 761 task_page = (struct fcoe_task_ctx_entry *) 762 interface->hba->task_ctx[task_idx]; 763 task = &(task_page[index]); 764 bnx2fc_init_mp_task(io_req, task); 765 766 bnx2fc_priv(sc_cmd)->io_req = io_req; 767 768 /* Obtain free SQ entry */ 769 spin_lock_bh(&tgt->tgt_lock); 770 bnx2fc_add_2_sq(tgt, xid); 771 772 /* Enqueue the io_req to active_tm_queue */ 773 io_req->on_tmf_queue = 1; 774 list_add_tail(&io_req->link, &tgt->active_tm_queue); 775 776 init_completion(&io_req->abts_done); 777 io_req->wait_for_abts_comp = 1; 778 779 /* Ring doorbell */ 780 bnx2fc_ring_doorbell(tgt); 781 spin_unlock_bh(&tgt->tgt_lock); 782 783 rc = wait_for_completion_timeout(&io_req->abts_done, 784 interface->tm_timeout * HZ); 785 spin_lock_bh(&tgt->tgt_lock); 786 787 io_req->wait_for_abts_comp = 0; 788 if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) { 789 set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags); 790 if (io_req->on_tmf_queue) { 791 list_del_init(&io_req->link); 792 io_req->on_tmf_queue = 0; 793 } 794 io_req->wait_for_cleanup_comp = 1; 795 init_completion(&io_req->cleanup_done); 796 bnx2fc_initiate_cleanup(io_req); 797 spin_unlock_bh(&tgt->tgt_lock); 798 rc = wait_for_completion_timeout(&io_req->cleanup_done, 799 BNX2FC_FW_TIMEOUT); 800 spin_lock_bh(&tgt->tgt_lock); 801 io_req->wait_for_cleanup_comp = 0; 802 if (!rc) 803 kref_put(&io_req->refcount, bnx2fc_cmd_release); 804 } 805 806 spin_unlock_bh(&tgt->tgt_lock); 807 808 if (!rc) { 809 BNX2FC_TGT_DBG(tgt, "task mgmt command failed...\n"); 810 rc = FAILED; 811 } else { 812 BNX2FC_TGT_DBG(tgt, "task mgmt command success...\n"); 813 rc = SUCCESS; 814 } 815 tmf_err: 816 return rc; 817 } 818 819 int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req) 820 { 821 struct fc_lport *lport; 822 struct bnx2fc_rport *tgt = io_req->tgt; 823 struct fc_rport *rport = tgt->rport; 824 struct fc_rport_priv *rdata = tgt->rdata; 825 struct bnx2fc_interface *interface; 826 struct fcoe_port *port; 827 struct bnx2fc_cmd *abts_io_req; 828 struct fcoe_task_ctx_entry *task; 829 struct fcoe_task_ctx_entry *task_page; 830 struct fc_frame_header *fc_hdr; 831 struct bnx2fc_mp_req *abts_req; 832 int task_idx, index; 833 u32 sid, did; 834 u16 xid; 835 int rc = SUCCESS; 836 u32 r_a_tov = rdata->r_a_tov; 837 838 /* called with tgt_lock held */ 839 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n"); 840 841 port = io_req->port; 842 interface = port->priv; 843 lport = port->lport; 844 845 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { 846 printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n"); 847 rc = FAILED; 848 goto abts_err; 849 } 850 851 if (rport == NULL) { 852 printk(KERN_ERR PFX "initiate_abts: rport is NULL\n"); 853 rc = FAILED; 854 goto abts_err; 855 } 856 857 if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 858 printk(KERN_ERR PFX "initiate_abts: link is not ready\n"); 859 rc = FAILED; 860 goto abts_err; 861 } 862 863 abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS); 864 if (!abts_io_req) { 865 printk(KERN_ERR PFX "abts: couldn't allocate cmd\n"); 866 rc = FAILED; 867 goto abts_err; 868 } 869 870 /* Initialize rest of io_req fields */ 871 abts_io_req->sc_cmd = NULL; 872 abts_io_req->port = port; 873 abts_io_req->tgt = tgt; 874 abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */ 875 876 abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req); 877 memset(abts_req, 0, sizeof(struct bnx2fc_mp_req)); 878 879 /* Fill FC header */ 880 fc_hdr = &(abts_req->req_fc_hdr); 881 882 /* Obtain oxid and rxid for the original exchange to be aborted */ 883 fc_hdr->fh_ox_id = htons(io_req->xid); 884 fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id); 885 886 sid = tgt->sid; 887 did = rport->port_id; 888 889 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid, 890 FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | 891 FC_FC_SEQ_INIT, 0); 892 893 xid = abts_io_req->xid; 894 BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n"); 895 task_idx = xid/BNX2FC_TASKS_PER_PAGE; 896 index = xid % BNX2FC_TASKS_PER_PAGE; 897 898 /* Initialize task context for this IO request */ 899 task_page = (struct fcoe_task_ctx_entry *) 900 interface->hba->task_ctx[task_idx]; 901 task = &(task_page[index]); 902 bnx2fc_init_mp_task(abts_io_req, task); 903 904 /* 905 * ABTS task is a temporary task that will be cleaned up 906 * irrespective of ABTS response. We need to start the timer 907 * for the original exchange, as the CQE is posted for the original 908 * IO request. 909 * 910 * Timer for ABTS is started only when it is originated by a 911 * TM request. For the ABTS issued as part of ULP timeout, 912 * scsi-ml maintains the timers. 913 */ 914 915 /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/ 916 bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov); 917 918 /* Obtain free SQ entry */ 919 bnx2fc_add_2_sq(tgt, xid); 920 921 /* Ring doorbell */ 922 bnx2fc_ring_doorbell(tgt); 923 924 abts_err: 925 return rc; 926 } 927 928 int bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd *orig_io_req, u32 offset, 929 enum fc_rctl r_ctl) 930 { 931 struct bnx2fc_rport *tgt = orig_io_req->tgt; 932 struct bnx2fc_interface *interface; 933 struct fcoe_port *port; 934 struct bnx2fc_cmd *seq_clnp_req; 935 struct fcoe_task_ctx_entry *task; 936 struct fcoe_task_ctx_entry *task_page; 937 struct bnx2fc_els_cb_arg *cb_arg = NULL; 938 int task_idx, index; 939 u16 xid; 940 int rc = 0; 941 942 BNX2FC_IO_DBG(orig_io_req, "bnx2fc_initiate_seq_cleanup xid = 0x%x\n", 943 orig_io_req->xid); 944 kref_get(&orig_io_req->refcount); 945 946 port = orig_io_req->port; 947 interface = port->priv; 948 949 cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC); 950 if (!cb_arg) { 951 printk(KERN_ERR PFX "Unable to alloc cb_arg for seq clnup\n"); 952 rc = -ENOMEM; 953 goto cleanup_err; 954 } 955 956 seq_clnp_req = bnx2fc_elstm_alloc(tgt, BNX2FC_SEQ_CLEANUP); 957 if (!seq_clnp_req) { 958 printk(KERN_ERR PFX "cleanup: couldn't allocate cmd\n"); 959 rc = -ENOMEM; 960 kfree(cb_arg); 961 goto cleanup_err; 962 } 963 /* Initialize rest of io_req fields */ 964 seq_clnp_req->sc_cmd = NULL; 965 seq_clnp_req->port = port; 966 seq_clnp_req->tgt = tgt; 967 seq_clnp_req->data_xfer_len = 0; /* No data transfer for cleanup */ 968 969 xid = seq_clnp_req->xid; 970 971 task_idx = xid/BNX2FC_TASKS_PER_PAGE; 972 index = xid % BNX2FC_TASKS_PER_PAGE; 973 974 /* Initialize task context for this IO request */ 975 task_page = (struct fcoe_task_ctx_entry *) 976 interface->hba->task_ctx[task_idx]; 977 task = &(task_page[index]); 978 cb_arg->aborted_io_req = orig_io_req; 979 cb_arg->io_req = seq_clnp_req; 980 cb_arg->r_ctl = r_ctl; 981 cb_arg->offset = offset; 982 seq_clnp_req->cb_arg = cb_arg; 983 984 printk(KERN_ERR PFX "call init_seq_cleanup_task\n"); 985 bnx2fc_init_seq_cleanup_task(seq_clnp_req, task, orig_io_req, offset); 986 987 /* Obtain free SQ entry */ 988 bnx2fc_add_2_sq(tgt, xid); 989 990 /* Ring doorbell */ 991 bnx2fc_ring_doorbell(tgt); 992 cleanup_err: 993 return rc; 994 } 995 996 int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req) 997 { 998 struct bnx2fc_rport *tgt = io_req->tgt; 999 struct bnx2fc_interface *interface; 1000 struct fcoe_port *port; 1001 struct bnx2fc_cmd *cleanup_io_req; 1002 struct fcoe_task_ctx_entry *task; 1003 struct fcoe_task_ctx_entry *task_page; 1004 int task_idx, index; 1005 u16 xid, orig_xid; 1006 int rc = 0; 1007 1008 /* ASSUMPTION: called with tgt_lock held */ 1009 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n"); 1010 1011 port = io_req->port; 1012 interface = port->priv; 1013 1014 cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP); 1015 if (!cleanup_io_req) { 1016 printk(KERN_ERR PFX "cleanup: couldn't allocate cmd\n"); 1017 rc = -1; 1018 goto cleanup_err; 1019 } 1020 1021 /* Initialize rest of io_req fields */ 1022 cleanup_io_req->sc_cmd = NULL; 1023 cleanup_io_req->port = port; 1024 cleanup_io_req->tgt = tgt; 1025 cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */ 1026 1027 xid = cleanup_io_req->xid; 1028 1029 task_idx = xid/BNX2FC_TASKS_PER_PAGE; 1030 index = xid % BNX2FC_TASKS_PER_PAGE; 1031 1032 /* Initialize task context for this IO request */ 1033 task_page = (struct fcoe_task_ctx_entry *) 1034 interface->hba->task_ctx[task_idx]; 1035 task = &(task_page[index]); 1036 orig_xid = io_req->xid; 1037 1038 BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid); 1039 1040 bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid); 1041 1042 /* Obtain free SQ entry */ 1043 bnx2fc_add_2_sq(tgt, xid); 1044 1045 /* Set flag that cleanup request is pending with the firmware */ 1046 set_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags); 1047 1048 /* Ring doorbell */ 1049 bnx2fc_ring_doorbell(tgt); 1050 1051 cleanup_err: 1052 return rc; 1053 } 1054 1055 /** 1056 * bnx2fc_eh_target_reset: Reset a target 1057 * 1058 * @sc_cmd: SCSI command 1059 * 1060 * Set from SCSI host template to send task mgmt command to the target 1061 * and wait for the response 1062 */ 1063 int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd) 1064 { 1065 return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET); 1066 } 1067 1068 /** 1069 * bnx2fc_eh_device_reset - Reset a single LUN 1070 * 1071 * @sc_cmd: SCSI command 1072 * 1073 * Set from SCSI host template to send task mgmt command to the target 1074 * and wait for the response 1075 */ 1076 int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd) 1077 { 1078 return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET); 1079 } 1080 1081 static int bnx2fc_abts_cleanup(struct bnx2fc_cmd *io_req) 1082 __must_hold(&tgt->tgt_lock) 1083 { 1084 struct bnx2fc_rport *tgt = io_req->tgt; 1085 unsigned int time_left; 1086 1087 init_completion(&io_req->cleanup_done); 1088 io_req->wait_for_cleanup_comp = 1; 1089 bnx2fc_initiate_cleanup(io_req); 1090 1091 spin_unlock_bh(&tgt->tgt_lock); 1092 1093 /* 1094 * Can't wait forever on cleanup response lest we let the SCSI error 1095 * handler wait forever 1096 */ 1097 time_left = wait_for_completion_timeout(&io_req->cleanup_done, 1098 BNX2FC_FW_TIMEOUT); 1099 if (!time_left) { 1100 BNX2FC_IO_DBG(io_req, "%s(): Wait for cleanup timed out.\n", 1101 __func__); 1102 1103 /* 1104 * Put the extra reference to the SCSI command since it would 1105 * not have been returned in this case. 1106 */ 1107 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1108 } 1109 1110 spin_lock_bh(&tgt->tgt_lock); 1111 io_req->wait_for_cleanup_comp = 0; 1112 return SUCCESS; 1113 } 1114 1115 /** 1116 * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding 1117 * SCSI command 1118 * 1119 * @sc_cmd: SCSI_ML command pointer 1120 * 1121 * SCSI abort request handler 1122 */ 1123 int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd) 1124 { 1125 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 1126 struct fc_rport_libfc_priv *rp = rport->dd_data; 1127 struct bnx2fc_cmd *io_req; 1128 struct fc_lport *lport; 1129 struct bnx2fc_rport *tgt; 1130 int rc; 1131 unsigned int time_left; 1132 1133 rc = fc_block_scsi_eh(sc_cmd); 1134 if (rc) 1135 return rc; 1136 1137 lport = shost_priv(sc_cmd->device->host); 1138 if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { 1139 printk(KERN_ERR PFX "eh_abort: link not ready\n"); 1140 return FAILED; 1141 } 1142 1143 tgt = (struct bnx2fc_rport *)&rp[1]; 1144 1145 BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n"); 1146 1147 spin_lock_bh(&tgt->tgt_lock); 1148 io_req = bnx2fc_priv(sc_cmd)->io_req; 1149 if (!io_req) { 1150 /* Command might have just completed */ 1151 printk(KERN_ERR PFX "eh_abort: io_req is NULL\n"); 1152 spin_unlock_bh(&tgt->tgt_lock); 1153 return SUCCESS; 1154 } 1155 BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n", 1156 kref_read(&io_req->refcount)); 1157 1158 /* Hold IO request across abort processing */ 1159 kref_get(&io_req->refcount); 1160 1161 BUG_ON(tgt != io_req->tgt); 1162 1163 /* Remove the io_req from the active_q. */ 1164 /* 1165 * Task Mgmt functions (LUN RESET & TGT RESET) will not 1166 * issue an ABTS on this particular IO req, as the 1167 * io_req is no longer in the active_q. 1168 */ 1169 if (tgt->flush_in_prog) { 1170 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1171 "flush in progress\n", io_req->xid); 1172 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1173 spin_unlock_bh(&tgt->tgt_lock); 1174 return SUCCESS; 1175 } 1176 1177 if (io_req->on_active_queue == 0) { 1178 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1179 "not on active_q\n", io_req->xid); 1180 /* 1181 * The IO is still with the FW. 1182 * Return failure and let SCSI-ml retry eh_abort. 1183 */ 1184 spin_unlock_bh(&tgt->tgt_lock); 1185 return FAILED; 1186 } 1187 1188 /* 1189 * Only eh_abort processing will remove the IO from 1190 * active_cmd_q before processing the request. this is 1191 * done to avoid race conditions between IOs aborted 1192 * as part of task management completion and eh_abort 1193 * processing 1194 */ 1195 list_del_init(&io_req->link); 1196 io_req->on_active_queue = 0; 1197 /* Move IO req to retire queue */ 1198 list_add_tail(&io_req->link, &tgt->io_retire_queue); 1199 1200 init_completion(&io_req->abts_done); 1201 init_completion(&io_req->cleanup_done); 1202 1203 if (test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { 1204 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1205 "already in abts processing\n", io_req->xid); 1206 if (cancel_delayed_work(&io_req->timeout_work)) 1207 kref_put(&io_req->refcount, 1208 bnx2fc_cmd_release); /* drop timer hold */ 1209 /* 1210 * We don't want to hold off the upper layer timer so simply 1211 * cleanup the command and return that I/O was successfully 1212 * aborted. 1213 */ 1214 bnx2fc_abts_cleanup(io_req); 1215 /* This only occurs when an task abort was requested while ABTS 1216 is in progress. Setting the IO_CLEANUP flag will skip the 1217 RRQ process in the case when the fw generated SCSI_CMD cmpl 1218 was a result from the ABTS request rather than the CLEANUP 1219 request */ 1220 set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags); 1221 rc = FAILED; 1222 goto done; 1223 } 1224 1225 /* Cancel the current timer running on this io_req */ 1226 if (cancel_delayed_work(&io_req->timeout_work)) 1227 kref_put(&io_req->refcount, 1228 bnx2fc_cmd_release); /* drop timer hold */ 1229 set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags); 1230 io_req->wait_for_abts_comp = 1; 1231 rc = bnx2fc_initiate_abts(io_req); 1232 if (rc == FAILED) { 1233 io_req->wait_for_cleanup_comp = 1; 1234 bnx2fc_initiate_cleanup(io_req); 1235 spin_unlock_bh(&tgt->tgt_lock); 1236 wait_for_completion(&io_req->cleanup_done); 1237 spin_lock_bh(&tgt->tgt_lock); 1238 io_req->wait_for_cleanup_comp = 0; 1239 goto done; 1240 } 1241 spin_unlock_bh(&tgt->tgt_lock); 1242 1243 /* Wait 2 * RA_TOV + 1 to be sure timeout function hasn't fired */ 1244 time_left = wait_for_completion_timeout(&io_req->abts_done, 1245 msecs_to_jiffies(2 * rp->r_a_tov + 1)); 1246 if (time_left) 1247 BNX2FC_IO_DBG(io_req, 1248 "Timed out in eh_abort waiting for abts_done"); 1249 1250 spin_lock_bh(&tgt->tgt_lock); 1251 io_req->wait_for_abts_comp = 0; 1252 if (test_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) { 1253 BNX2FC_IO_DBG(io_req, "IO completed in a different context\n"); 1254 rc = SUCCESS; 1255 } else if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 1256 &io_req->req_flags))) { 1257 /* Let the scsi-ml try to recover this command */ 1258 printk(KERN_ERR PFX "abort failed, xid = 0x%x\n", 1259 io_req->xid); 1260 /* 1261 * Cleanup firmware residuals before returning control back 1262 * to SCSI ML. 1263 */ 1264 rc = bnx2fc_abts_cleanup(io_req); 1265 goto done; 1266 } else { 1267 /* 1268 * We come here even when there was a race condition 1269 * between timeout and abts completion, and abts 1270 * completion happens just in time. 1271 */ 1272 BNX2FC_IO_DBG(io_req, "abort succeeded\n"); 1273 rc = SUCCESS; 1274 bnx2fc_scsi_done(io_req, DID_ABORT); 1275 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1276 } 1277 done: 1278 /* release the reference taken in eh_abort */ 1279 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1280 spin_unlock_bh(&tgt->tgt_lock); 1281 return rc; 1282 } 1283 1284 void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnp_req, 1285 struct fcoe_task_ctx_entry *task, 1286 u8 rx_state) 1287 { 1288 struct bnx2fc_els_cb_arg *cb_arg = seq_clnp_req->cb_arg; 1289 struct bnx2fc_cmd *orig_io_req = cb_arg->aborted_io_req; 1290 u32 offset = cb_arg->offset; 1291 enum fc_rctl r_ctl = cb_arg->r_ctl; 1292 int rc = 0; 1293 struct bnx2fc_rport *tgt = orig_io_req->tgt; 1294 1295 BNX2FC_IO_DBG(orig_io_req, "Entered process_cleanup_compl xid = 0x%x" 1296 "cmd_type = %d\n", 1297 seq_clnp_req->xid, seq_clnp_req->cmd_type); 1298 1299 if (rx_state == FCOE_TASK_RX_STATE_IGNORED_SEQUENCE_CLEANUP) { 1300 printk(KERN_ERR PFX "seq cleanup ignored - xid = 0x%x\n", 1301 seq_clnp_req->xid); 1302 goto free_cb_arg; 1303 } 1304 1305 spin_unlock_bh(&tgt->tgt_lock); 1306 rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl); 1307 spin_lock_bh(&tgt->tgt_lock); 1308 1309 if (rc) 1310 printk(KERN_ERR PFX "clnup_compl: Unable to send SRR" 1311 " IO will abort\n"); 1312 seq_clnp_req->cb_arg = NULL; 1313 kref_put(&orig_io_req->refcount, bnx2fc_cmd_release); 1314 free_cb_arg: 1315 kfree(cb_arg); 1316 return; 1317 } 1318 1319 void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req, 1320 struct fcoe_task_ctx_entry *task, 1321 u8 num_rq) 1322 { 1323 BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl " 1324 "refcnt = %d, cmd_type = %d\n", 1325 kref_read(&io_req->refcount), io_req->cmd_type); 1326 /* 1327 * Test whether there is a cleanup request pending. If not just 1328 * exit. 1329 */ 1330 if (!test_and_clear_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, 1331 &io_req->req_flags)) 1332 return; 1333 /* 1334 * If we receive a cleanup completion for this request then the 1335 * firmware will not give us an abort completion for this request 1336 * so clear any ABTS pending flags. 1337 */ 1338 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags) && 1339 !test_bit(BNX2FC_FLAG_ABTS_DONE, &io_req->req_flags)) { 1340 set_bit(BNX2FC_FLAG_ABTS_DONE, &io_req->req_flags); 1341 if (io_req->wait_for_abts_comp) 1342 complete(&io_req->abts_done); 1343 } 1344 1345 bnx2fc_scsi_done(io_req, DID_ERROR); 1346 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1347 if (io_req->wait_for_cleanup_comp) 1348 complete(&io_req->cleanup_done); 1349 } 1350 1351 void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req, 1352 struct fcoe_task_ctx_entry *task, 1353 u8 num_rq) 1354 { 1355 u32 r_ctl; 1356 u32 r_a_tov = FC_DEF_R_A_TOV; 1357 u8 issue_rrq = 0; 1358 struct bnx2fc_rport *tgt = io_req->tgt; 1359 1360 BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x" 1361 "refcnt = %d, cmd_type = %d\n", 1362 io_req->xid, 1363 kref_read(&io_req->refcount), io_req->cmd_type); 1364 1365 if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 1366 &io_req->req_flags)) { 1367 BNX2FC_IO_DBG(io_req, "Timer context finished processing" 1368 " this io\n"); 1369 return; 1370 } 1371 1372 /* 1373 * If we receive an ABTS completion here then we will not receive 1374 * a cleanup completion so clear any cleanup pending flags. 1375 */ 1376 if (test_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags)) { 1377 clear_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags); 1378 if (io_req->wait_for_cleanup_comp) 1379 complete(&io_req->cleanup_done); 1380 } 1381 1382 /* Do not issue RRQ as this IO is already cleanedup */ 1383 if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP, 1384 &io_req->req_flags)) 1385 goto io_compl; 1386 1387 /* 1388 * For ABTS issued due to SCSI eh_abort_handler, timeout 1389 * values are maintained by scsi-ml itself. Cancel timeout 1390 * in case ABTS issued as part of task management function 1391 * or due to FW error. 1392 */ 1393 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) 1394 if (cancel_delayed_work(&io_req->timeout_work)) 1395 kref_put(&io_req->refcount, 1396 bnx2fc_cmd_release); /* drop timer hold */ 1397 1398 r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl; 1399 1400 switch (r_ctl) { 1401 case FC_RCTL_BA_ACC: 1402 /* 1403 * Dont release this cmd yet. It will be relesed 1404 * after we get RRQ response 1405 */ 1406 BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n"); 1407 issue_rrq = 1; 1408 break; 1409 1410 case FC_RCTL_BA_RJT: 1411 BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n"); 1412 break; 1413 default: 1414 printk(KERN_ERR PFX "Unknown ABTS response\n"); 1415 break; 1416 } 1417 1418 if (issue_rrq) { 1419 BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n"); 1420 set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags); 1421 } 1422 set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); 1423 bnx2fc_cmd_timer_set(io_req, r_a_tov); 1424 1425 io_compl: 1426 if (io_req->wait_for_abts_comp) { 1427 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, 1428 &io_req->req_flags)) 1429 complete(&io_req->abts_done); 1430 } else { 1431 /* 1432 * We end up here when ABTS is issued as 1433 * in asynchronous context, i.e., as part 1434 * of task management completion, or 1435 * when FW error is received or when the 1436 * ABTS is issued when the IO is timed 1437 * out. 1438 */ 1439 1440 if (io_req->on_active_queue) { 1441 list_del_init(&io_req->link); 1442 io_req->on_active_queue = 0; 1443 /* Move IO req to retire queue */ 1444 list_add_tail(&io_req->link, &tgt->io_retire_queue); 1445 } 1446 bnx2fc_scsi_done(io_req, DID_ERROR); 1447 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1448 } 1449 } 1450 1451 static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req) 1452 { 1453 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1454 struct bnx2fc_rport *tgt = io_req->tgt; 1455 struct bnx2fc_cmd *cmd, *tmp; 1456 u64 tm_lun = sc_cmd->device->lun; 1457 u64 lun; 1458 int rc = 0; 1459 1460 /* called with tgt_lock held */ 1461 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n"); 1462 /* 1463 * Walk thru the active_ios queue and ABORT the IO 1464 * that matches with the LUN that was reset 1465 */ 1466 list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) { 1467 BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n"); 1468 lun = cmd->sc_cmd->device->lun; 1469 if (lun == tm_lun) { 1470 /* Initiate ABTS on this cmd */ 1471 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, 1472 &cmd->req_flags)) { 1473 /* cancel the IO timeout */ 1474 if (cancel_delayed_work(&io_req->timeout_work)) 1475 kref_put(&io_req->refcount, 1476 bnx2fc_cmd_release); 1477 /* timer hold */ 1478 rc = bnx2fc_initiate_abts(cmd); 1479 /* abts shouldn't fail in this context */ 1480 WARN_ON(rc != SUCCESS); 1481 } else 1482 printk(KERN_ERR PFX "lun_rst: abts already in" 1483 " progress for this IO 0x%x\n", 1484 cmd->xid); 1485 } 1486 } 1487 } 1488 1489 static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req) 1490 { 1491 struct bnx2fc_rport *tgt = io_req->tgt; 1492 struct bnx2fc_cmd *cmd, *tmp; 1493 int rc = 0; 1494 1495 /* called with tgt_lock held */ 1496 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n"); 1497 /* 1498 * Walk thru the active_ios queue and ABORT the IO 1499 * that matches with the LUN that was reset 1500 */ 1501 list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) { 1502 BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n"); 1503 /* Initiate ABTS */ 1504 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, 1505 &cmd->req_flags)) { 1506 /* cancel the IO timeout */ 1507 if (cancel_delayed_work(&io_req->timeout_work)) 1508 kref_put(&io_req->refcount, 1509 bnx2fc_cmd_release); /* timer hold */ 1510 rc = bnx2fc_initiate_abts(cmd); 1511 /* abts shouldn't fail in this context */ 1512 WARN_ON(rc != SUCCESS); 1513 1514 } else 1515 printk(KERN_ERR PFX "tgt_rst: abts already in progress" 1516 " for this IO 0x%x\n", cmd->xid); 1517 } 1518 } 1519 1520 void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req, 1521 struct fcoe_task_ctx_entry *task, u8 num_rq, 1522 unsigned char *rq_data) 1523 { 1524 struct bnx2fc_mp_req *tm_req; 1525 struct fc_frame_header *fc_hdr; 1526 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1527 u64 *hdr; 1528 u64 *temp_hdr; 1529 void *rsp_buf; 1530 1531 /* Called with tgt_lock held */ 1532 BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n"); 1533 1534 if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags))) 1535 set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags); 1536 else { 1537 /* TM has already timed out and we got 1538 * delayed completion. Ignore completion 1539 * processing. 1540 */ 1541 return; 1542 } 1543 1544 tm_req = &(io_req->mp_req); 1545 fc_hdr = &(tm_req->resp_fc_hdr); 1546 hdr = (u64 *)fc_hdr; 1547 temp_hdr = (u64 *) 1548 &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr; 1549 hdr[0] = cpu_to_be64(temp_hdr[0]); 1550 hdr[1] = cpu_to_be64(temp_hdr[1]); 1551 hdr[2] = cpu_to_be64(temp_hdr[2]); 1552 1553 tm_req->resp_len = 1554 task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len; 1555 1556 rsp_buf = tm_req->resp_buf; 1557 1558 if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) { 1559 bnx2fc_parse_fcp_rsp(io_req, 1560 (struct fcoe_fcp_rsp_payload *) 1561 rsp_buf, num_rq, rq_data); 1562 if (io_req->fcp_rsp_code == 0) { 1563 /* TM successful */ 1564 if (tm_req->tm_flags & FCP_TMF_LUN_RESET) 1565 bnx2fc_lun_reset_cmpl(io_req); 1566 else if (tm_req->tm_flags & FCP_TMF_TGT_RESET) 1567 bnx2fc_tgt_reset_cmpl(io_req); 1568 } 1569 } else { 1570 printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n", 1571 fc_hdr->fh_r_ctl); 1572 } 1573 if (!bnx2fc_priv(sc_cmd)->io_req) { 1574 printk(KERN_ERR PFX "tm_compl: io_req is NULL\n"); 1575 return; 1576 } 1577 switch (io_req->fcp_status) { 1578 case FC_GOOD: 1579 if (io_req->cdb_status == 0) { 1580 /* Good IO completion */ 1581 sc_cmd->result = DID_OK << 16; 1582 } else { 1583 /* Transport status is good, SCSI status not good */ 1584 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1585 } 1586 if (io_req->fcp_resid) 1587 scsi_set_resid(sc_cmd, io_req->fcp_resid); 1588 break; 1589 1590 default: 1591 BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n", 1592 io_req->fcp_status); 1593 break; 1594 } 1595 1596 sc_cmd = io_req->sc_cmd; 1597 io_req->sc_cmd = NULL; 1598 1599 /* check if the io_req exists in tgt's tmf_q */ 1600 if (io_req->on_tmf_queue) { 1601 1602 list_del_init(&io_req->link); 1603 io_req->on_tmf_queue = 0; 1604 } else { 1605 1606 printk(KERN_ERR PFX "Command not on active_cmd_queue!\n"); 1607 return; 1608 } 1609 1610 bnx2fc_priv(sc_cmd)->io_req = NULL; 1611 scsi_done(sc_cmd); 1612 1613 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1614 if (io_req->wait_for_abts_comp) { 1615 BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n"); 1616 complete(&io_req->abts_done); 1617 } 1618 } 1619 1620 static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, 1621 int bd_index) 1622 { 1623 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1624 int frag_size, sg_frags; 1625 1626 sg_frags = 0; 1627 while (sg_len) { 1628 if (sg_len >= BNX2FC_BD_SPLIT_SZ) 1629 frag_size = BNX2FC_BD_SPLIT_SZ; 1630 else 1631 frag_size = sg_len; 1632 bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff; 1633 bd[bd_index + sg_frags].buf_addr_hi = addr >> 32; 1634 bd[bd_index + sg_frags].buf_len = (u16)frag_size; 1635 bd[bd_index + sg_frags].flags = 0; 1636 1637 addr += (u64) frag_size; 1638 sg_frags++; 1639 sg_len -= frag_size; 1640 } 1641 return sg_frags; 1642 1643 } 1644 1645 static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req) 1646 { 1647 struct bnx2fc_interface *interface = io_req->port->priv; 1648 struct bnx2fc_hba *hba = interface->hba; 1649 struct scsi_cmnd *sc = io_req->sc_cmd; 1650 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1651 struct scatterlist *sg; 1652 int byte_count = 0; 1653 int sg_count = 0; 1654 int bd_count = 0; 1655 int sg_frags; 1656 unsigned int sg_len; 1657 u64 addr; 1658 int i; 1659 1660 WARN_ON(scsi_sg_count(sc) > BNX2FC_MAX_BDS_PER_CMD); 1661 /* 1662 * Use dma_map_sg directly to ensure we're using the correct 1663 * dev struct off of pcidev. 1664 */ 1665 sg_count = dma_map_sg(&hba->pcidev->dev, scsi_sglist(sc), 1666 scsi_sg_count(sc), sc->sc_data_direction); 1667 scsi_for_each_sg(sc, sg, sg_count, i) { 1668 sg_len = sg_dma_len(sg); 1669 addr = sg_dma_address(sg); 1670 if (sg_len > BNX2FC_MAX_BD_LEN) { 1671 sg_frags = bnx2fc_split_bd(io_req, addr, sg_len, 1672 bd_count); 1673 } else { 1674 1675 sg_frags = 1; 1676 bd[bd_count].buf_addr_lo = addr & 0xffffffff; 1677 bd[bd_count].buf_addr_hi = addr >> 32; 1678 bd[bd_count].buf_len = (u16)sg_len; 1679 bd[bd_count].flags = 0; 1680 } 1681 bd_count += sg_frags; 1682 byte_count += sg_len; 1683 } 1684 if (byte_count != scsi_bufflen(sc)) 1685 printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, " 1686 "task_id = 0x%x\n", byte_count, scsi_bufflen(sc), 1687 io_req->xid); 1688 return bd_count; 1689 } 1690 1691 static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req) 1692 { 1693 struct scsi_cmnd *sc = io_req->sc_cmd; 1694 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1695 int bd_count; 1696 1697 if (scsi_sg_count(sc)) { 1698 bd_count = bnx2fc_map_sg(io_req); 1699 if (bd_count == 0) 1700 return -ENOMEM; 1701 } else { 1702 bd_count = 0; 1703 bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0; 1704 bd[0].buf_len = bd[0].flags = 0; 1705 } 1706 io_req->bd_tbl->bd_valid = bd_count; 1707 1708 /* 1709 * Return the command to ML if BD count exceeds the max number 1710 * that can be handled by FW. 1711 */ 1712 if (bd_count > BNX2FC_FW_MAX_BDS_PER_CMD) { 1713 pr_err("bd_count = %d exceeded FW supported max BD(255), task_id = 0x%x\n", 1714 bd_count, io_req->xid); 1715 return -ENOMEM; 1716 } 1717 1718 return 0; 1719 } 1720 1721 static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req) 1722 { 1723 struct scsi_cmnd *sc = io_req->sc_cmd; 1724 struct bnx2fc_interface *interface = io_req->port->priv; 1725 struct bnx2fc_hba *hba = interface->hba; 1726 1727 /* 1728 * Use dma_unmap_sg directly to ensure we're using the correct 1729 * dev struct off of pcidev. 1730 */ 1731 if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) { 1732 dma_unmap_sg(&hba->pcidev->dev, scsi_sglist(sc), 1733 scsi_sg_count(sc), sc->sc_data_direction); 1734 io_req->bd_tbl->bd_valid = 0; 1735 } 1736 } 1737 1738 void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req, 1739 struct fcp_cmnd *fcp_cmnd) 1740 { 1741 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1742 1743 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); 1744 1745 int_to_scsilun(sc_cmd->device->lun, &fcp_cmnd->fc_lun); 1746 1747 fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len); 1748 memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len); 1749 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 1757 static 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 defined 1781 * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO 1782 * 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_len 1788 = 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 template 1833 * 1834 * @host: The Scsi_Host the command was issued to 1835 * @sc_cmd: struct scsi_cmnd to be executed 1836 * 1837 * This is the IO strategy routine, called by SCSI-ML 1838 **/ 1839 int 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 retry 1868 * 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 1898 exit_qcmd_tgtlock: 1899 spin_unlock_bh(&tgt->tgt_lock); 1900 exit_qcmd: 1901 return rc; 1902 } 1903 1904 void 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 pulled 1958 * by bnx2fc_flush_active_ios(), or during a race 1959 * 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 or 1986 * TASK_SET_FULL may return a status that needs 1987 * the scope bits masked. 1988 * Or a huge delay timestamp up to 27 minutes 1989 * can result. 1990 */ 1991 if (fcp_rsp->retry_delay_timer) { 1992 /* Upper 2 bits */ 1993 scope = fcp_rsp->retry_delay_timer 1994 & 0xC000; 1995 /* Lower 14 bits */ 1996 qualifier = fcp_rsp->retry_delay_timer 1997 & 0x3FFF; 1998 } 1999 if (scope > 0 && qualifier > 0 && 2000 qualifier <= 0x3FEF) { 2001 /* Set the jiffies + 2002 * retry_delay_timer * 100ms 2003 * for the rport/tgt 2004 */ 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 2023 int 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