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 = get_cpu(); 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 put_cpu(); 489 return NULL; 490 } 491 492 listp = (struct list_head *) 493 cmd_mgr->free_list[index].next; 494 list_del_init(listp); 495 io_req = (struct bnx2fc_cmd *) listp; 496 xid = io_req->xid; 497 cmd_mgr->cmds[xid] = io_req; 498 atomic_inc(&tgt->num_active_ios); 499 atomic_dec(&tgt->free_sqes); 500 spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 501 put_cpu(); 502 503 INIT_LIST_HEAD(&io_req->link); 504 505 io_req->port = port; 506 io_req->cmd_mgr = cmd_mgr; 507 io_req->req_flags = 0; 508 509 /* Bind io_bdt for this io_req */ 510 /* Have a static link between io_req and io_bdt_pool */ 511 bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; 512 bd_tbl->io_req = io_req; 513 514 /* Hold the io_req against deletion */ 515 kref_init(&io_req->refcount); 516 return io_req; 517 } 518 519 void bnx2fc_cmd_release(struct kref *ref) 520 { 521 struct bnx2fc_cmd *io_req = container_of(ref, 522 struct bnx2fc_cmd, refcount); 523 struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr; 524 int index; 525 526 if (io_req->cmd_type == BNX2FC_SCSI_CMD) 527 index = io_req->xid % num_possible_cpus(); 528 else 529 index = RESERVE_FREE_LIST_INDEX; 530 531 532 spin_lock_bh(&cmd_mgr->free_list_lock[index]); 533 if (io_req->cmd_type != BNX2FC_SCSI_CMD) 534 bnx2fc_free_mp_resc(io_req); 535 cmd_mgr->cmds[io_req->xid] = NULL; 536 /* Delete IO from retire queue */ 537 list_del_init(&io_req->link); 538 /* Add it to the free list */ 539 list_add(&io_req->link, 540 &cmd_mgr->free_list[index]); 541 atomic_dec(&io_req->tgt->num_active_ios); 542 spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 543 544 } 545 546 static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req) 547 { 548 struct bnx2fc_mp_req *mp_req = &(io_req->mp_req); 549 struct bnx2fc_interface *interface = io_req->port->priv; 550 struct bnx2fc_hba *hba = interface->hba; 551 size_t sz = sizeof(struct fcoe_bd_ctx); 552 553 /* clear tm flags */ 554 mp_req->tm_flags = 0; 555 if (mp_req->mp_req_bd) { 556 dma_free_coherent(&hba->pcidev->dev, sz, 557 mp_req->mp_req_bd, 558 mp_req->mp_req_bd_dma); 559 mp_req->mp_req_bd = NULL; 560 } 561 if (mp_req->mp_resp_bd) { 562 dma_free_coherent(&hba->pcidev->dev, sz, 563 mp_req->mp_resp_bd, 564 mp_req->mp_resp_bd_dma); 565 mp_req->mp_resp_bd = NULL; 566 } 567 if (mp_req->req_buf) { 568 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, 569 mp_req->req_buf, 570 mp_req->req_buf_dma); 571 mp_req->req_buf = NULL; 572 } 573 if (mp_req->resp_buf) { 574 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, 575 mp_req->resp_buf, 576 mp_req->resp_buf_dma); 577 mp_req->resp_buf = NULL; 578 } 579 } 580 581 int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req) 582 { 583 struct bnx2fc_mp_req *mp_req; 584 struct fcoe_bd_ctx *mp_req_bd; 585 struct fcoe_bd_ctx *mp_resp_bd; 586 struct bnx2fc_interface *interface = io_req->port->priv; 587 struct bnx2fc_hba *hba = interface->hba; 588 dma_addr_t addr; 589 size_t sz; 590 591 mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); 592 memset(mp_req, 0, sizeof(struct bnx2fc_mp_req)); 593 594 if (io_req->cmd_type != BNX2FC_ELS) { 595 mp_req->req_len = sizeof(struct fcp_cmnd); 596 io_req->data_xfer_len = mp_req->req_len; 597 } else 598 mp_req->req_len = io_req->data_xfer_len; 599 600 mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, 601 &mp_req->req_buf_dma, 602 GFP_ATOMIC); 603 if (!mp_req->req_buf) { 604 printk(KERN_ERR PFX "unable to alloc MP req buffer\n"); 605 bnx2fc_free_mp_resc(io_req); 606 return FAILED; 607 } 608 609 mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE, 610 &mp_req->resp_buf_dma, 611 GFP_ATOMIC); 612 if (!mp_req->resp_buf) { 613 printk(KERN_ERR PFX "unable to alloc TM resp buffer\n"); 614 bnx2fc_free_mp_resc(io_req); 615 return FAILED; 616 } 617 memset(mp_req->req_buf, 0, CNIC_PAGE_SIZE); 618 memset(mp_req->resp_buf, 0, CNIC_PAGE_SIZE); 619 620 /* Allocate and map mp_req_bd and mp_resp_bd */ 621 sz = sizeof(struct fcoe_bd_ctx); 622 mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, 623 &mp_req->mp_req_bd_dma, 624 GFP_ATOMIC); 625 if (!mp_req->mp_req_bd) { 626 printk(KERN_ERR PFX "unable to alloc MP req bd\n"); 627 bnx2fc_free_mp_resc(io_req); 628 return FAILED; 629 } 630 mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, 631 &mp_req->mp_resp_bd_dma, 632 GFP_ATOMIC); 633 if (!mp_req->mp_resp_bd) { 634 printk(KERN_ERR PFX "unable to alloc MP resp bd\n"); 635 bnx2fc_free_mp_resc(io_req); 636 return FAILED; 637 } 638 /* Fill bd table */ 639 addr = mp_req->req_buf_dma; 640 mp_req_bd = mp_req->mp_req_bd; 641 mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff; 642 mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32); 643 mp_req_bd->buf_len = CNIC_PAGE_SIZE; 644 mp_req_bd->flags = 0; 645 646 /* 647 * MP buffer is either a task mgmt command or an ELS. 648 * So the assumption is that it consumes a single bd 649 * entry in the bd table 650 */ 651 mp_resp_bd = mp_req->mp_resp_bd; 652 addr = mp_req->resp_buf_dma; 653 mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff; 654 mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32); 655 mp_resp_bd->buf_len = CNIC_PAGE_SIZE; 656 mp_resp_bd->flags = 0; 657 658 return SUCCESS; 659 } 660 661 static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags) 662 { 663 struct fc_lport *lport; 664 struct fc_rport *rport; 665 struct fc_rport_libfc_priv *rp; 666 struct fcoe_port *port; 667 struct bnx2fc_interface *interface; 668 struct bnx2fc_rport *tgt; 669 struct bnx2fc_cmd *io_req; 670 struct bnx2fc_mp_req *tm_req; 671 struct fcoe_task_ctx_entry *task; 672 struct fcoe_task_ctx_entry *task_page; 673 struct Scsi_Host *host = sc_cmd->device->host; 674 struct fc_frame_header *fc_hdr; 675 struct fcp_cmnd *fcp_cmnd; 676 int task_idx, index; 677 int rc = SUCCESS; 678 u16 xid; 679 u32 sid, did; 680 unsigned long start = jiffies; 681 682 lport = shost_priv(host); 683 rport = starget_to_rport(scsi_target(sc_cmd->device)); 684 port = lport_priv(lport); 685 interface = port->priv; 686 687 if (rport == NULL) { 688 printk(KERN_ERR PFX "device_reset: rport is NULL\n"); 689 rc = FAILED; 690 goto tmf_err; 691 } 692 rp = rport->dd_data; 693 694 rc = fc_block_scsi_eh(sc_cmd); 695 if (rc) 696 return rc; 697 698 if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 699 printk(KERN_ERR PFX "device_reset: link is not ready\n"); 700 rc = FAILED; 701 goto tmf_err; 702 } 703 /* rport and tgt are allocated together, so tgt should be non-NULL */ 704 tgt = (struct bnx2fc_rport *)&rp[1]; 705 706 if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) { 707 printk(KERN_ERR PFX "device_reset: tgt not offloaded\n"); 708 rc = FAILED; 709 goto tmf_err; 710 } 711 retry_tmf: 712 io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD); 713 if (!io_req) { 714 if (time_after(jiffies, start + HZ)) { 715 printk(KERN_ERR PFX "tmf: Failed TMF"); 716 rc = FAILED; 717 goto tmf_err; 718 } 719 msleep(20); 720 goto retry_tmf; 721 } 722 /* Initialize rest of io_req fields */ 723 io_req->sc_cmd = sc_cmd; 724 io_req->port = port; 725 io_req->tgt = tgt; 726 727 tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); 728 729 rc = bnx2fc_init_mp_req(io_req); 730 if (rc == FAILED) { 731 printk(KERN_ERR PFX "Task mgmt MP request init failed\n"); 732 spin_lock_bh(&tgt->tgt_lock); 733 kref_put(&io_req->refcount, bnx2fc_cmd_release); 734 spin_unlock_bh(&tgt->tgt_lock); 735 goto tmf_err; 736 } 737 738 /* Set TM flags */ 739 io_req->io_req_flags = 0; 740 tm_req->tm_flags = tm_flags; 741 742 /* Fill FCP_CMND */ 743 bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf); 744 fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf; 745 memset(fcp_cmnd->fc_cdb, 0, sc_cmd->cmd_len); 746 fcp_cmnd->fc_dl = 0; 747 748 /* Fill FC header */ 749 fc_hdr = &(tm_req->req_fc_hdr); 750 sid = tgt->sid; 751 did = rport->port_id; 752 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid, 753 FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | 754 FC_FC_SEQ_INIT, 0); 755 /* Obtain exchange id */ 756 xid = io_req->xid; 757 758 BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid); 759 task_idx = xid/BNX2FC_TASKS_PER_PAGE; 760 index = xid % BNX2FC_TASKS_PER_PAGE; 761 762 /* Initialize task context for this IO request */ 763 task_page = (struct fcoe_task_ctx_entry *) 764 interface->hba->task_ctx[task_idx]; 765 task = &(task_page[index]); 766 bnx2fc_init_mp_task(io_req, task); 767 768 bnx2fc_priv(sc_cmd)->io_req = io_req; 769 770 /* Obtain free SQ entry */ 771 spin_lock_bh(&tgt->tgt_lock); 772 bnx2fc_add_2_sq(tgt, xid); 773 774 /* Enqueue the io_req to active_tm_queue */ 775 io_req->on_tmf_queue = 1; 776 list_add_tail(&io_req->link, &tgt->active_tm_queue); 777 778 init_completion(&io_req->abts_done); 779 io_req->wait_for_abts_comp = 1; 780 781 /* Ring doorbell */ 782 bnx2fc_ring_doorbell(tgt); 783 spin_unlock_bh(&tgt->tgt_lock); 784 785 rc = wait_for_completion_timeout(&io_req->abts_done, 786 interface->tm_timeout * HZ); 787 spin_lock_bh(&tgt->tgt_lock); 788 789 io_req->wait_for_abts_comp = 0; 790 if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) { 791 set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags); 792 if (io_req->on_tmf_queue) { 793 list_del_init(&io_req->link); 794 io_req->on_tmf_queue = 0; 795 } 796 io_req->wait_for_cleanup_comp = 1; 797 init_completion(&io_req->cleanup_done); 798 bnx2fc_initiate_cleanup(io_req); 799 spin_unlock_bh(&tgt->tgt_lock); 800 rc = wait_for_completion_timeout(&io_req->cleanup_done, 801 BNX2FC_FW_TIMEOUT); 802 spin_lock_bh(&tgt->tgt_lock); 803 io_req->wait_for_cleanup_comp = 0; 804 if (!rc) 805 kref_put(&io_req->refcount, bnx2fc_cmd_release); 806 } 807 808 spin_unlock_bh(&tgt->tgt_lock); 809 810 if (!rc) { 811 BNX2FC_TGT_DBG(tgt, "task mgmt command failed...\n"); 812 rc = FAILED; 813 } else { 814 BNX2FC_TGT_DBG(tgt, "task mgmt command success...\n"); 815 rc = SUCCESS; 816 } 817 tmf_err: 818 return rc; 819 } 820 821 int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req) 822 { 823 struct fc_lport *lport; 824 struct bnx2fc_rport *tgt = io_req->tgt; 825 struct fc_rport *rport = tgt->rport; 826 struct fc_rport_priv *rdata = tgt->rdata; 827 struct bnx2fc_interface *interface; 828 struct fcoe_port *port; 829 struct bnx2fc_cmd *abts_io_req; 830 struct fcoe_task_ctx_entry *task; 831 struct fcoe_task_ctx_entry *task_page; 832 struct fc_frame_header *fc_hdr; 833 struct bnx2fc_mp_req *abts_req; 834 int task_idx, index; 835 u32 sid, did; 836 u16 xid; 837 int rc = SUCCESS; 838 u32 r_a_tov = rdata->r_a_tov; 839 840 /* called with tgt_lock held */ 841 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n"); 842 843 port = io_req->port; 844 interface = port->priv; 845 lport = port->lport; 846 847 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { 848 printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n"); 849 rc = FAILED; 850 goto abts_err; 851 } 852 853 if (rport == NULL) { 854 printk(KERN_ERR PFX "initiate_abts: rport is NULL\n"); 855 rc = FAILED; 856 goto abts_err; 857 } 858 859 if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 860 printk(KERN_ERR PFX "initiate_abts: link is not ready\n"); 861 rc = FAILED; 862 goto abts_err; 863 } 864 865 abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS); 866 if (!abts_io_req) { 867 printk(KERN_ERR PFX "abts: couldn't allocate cmd\n"); 868 rc = FAILED; 869 goto abts_err; 870 } 871 872 /* Initialize rest of io_req fields */ 873 abts_io_req->sc_cmd = NULL; 874 abts_io_req->port = port; 875 abts_io_req->tgt = tgt; 876 abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */ 877 878 abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req); 879 memset(abts_req, 0, sizeof(struct bnx2fc_mp_req)); 880 881 /* Fill FC header */ 882 fc_hdr = &(abts_req->req_fc_hdr); 883 884 /* Obtain oxid and rxid for the original exchange to be aborted */ 885 fc_hdr->fh_ox_id = htons(io_req->xid); 886 fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id); 887 888 sid = tgt->sid; 889 did = rport->port_id; 890 891 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid, 892 FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | 893 FC_FC_SEQ_INIT, 0); 894 895 xid = abts_io_req->xid; 896 BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n"); 897 task_idx = xid/BNX2FC_TASKS_PER_PAGE; 898 index = xid % BNX2FC_TASKS_PER_PAGE; 899 900 /* Initialize task context for this IO request */ 901 task_page = (struct fcoe_task_ctx_entry *) 902 interface->hba->task_ctx[task_idx]; 903 task = &(task_page[index]); 904 bnx2fc_init_mp_task(abts_io_req, task); 905 906 /* 907 * ABTS task is a temporary task that will be cleaned up 908 * irrespective of ABTS response. We need to start the timer 909 * for the original exchange, as the CQE is posted for the original 910 * IO request. 911 * 912 * Timer for ABTS is started only when it is originated by a 913 * TM request. For the ABTS issued as part of ULP timeout, 914 * scsi-ml maintains the timers. 915 */ 916 917 /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/ 918 bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov); 919 920 /* Obtain free SQ entry */ 921 bnx2fc_add_2_sq(tgt, xid); 922 923 /* Ring doorbell */ 924 bnx2fc_ring_doorbell(tgt); 925 926 abts_err: 927 return rc; 928 } 929 930 int bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd *orig_io_req, u32 offset, 931 enum fc_rctl r_ctl) 932 { 933 struct bnx2fc_rport *tgt = orig_io_req->tgt; 934 struct bnx2fc_interface *interface; 935 struct fcoe_port *port; 936 struct bnx2fc_cmd *seq_clnp_req; 937 struct fcoe_task_ctx_entry *task; 938 struct fcoe_task_ctx_entry *task_page; 939 struct bnx2fc_els_cb_arg *cb_arg = NULL; 940 int task_idx, index; 941 u16 xid; 942 int rc = 0; 943 944 BNX2FC_IO_DBG(orig_io_req, "bnx2fc_initiate_seq_cleanup xid = 0x%x\n", 945 orig_io_req->xid); 946 kref_get(&orig_io_req->refcount); 947 948 port = orig_io_req->port; 949 interface = port->priv; 950 951 cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC); 952 if (!cb_arg) { 953 printk(KERN_ERR PFX "Unable to alloc cb_arg for seq clnup\n"); 954 rc = -ENOMEM; 955 goto cleanup_err; 956 } 957 958 seq_clnp_req = bnx2fc_elstm_alloc(tgt, BNX2FC_SEQ_CLEANUP); 959 if (!seq_clnp_req) { 960 printk(KERN_ERR PFX "cleanup: couldn't allocate cmd\n"); 961 rc = -ENOMEM; 962 kfree(cb_arg); 963 goto cleanup_err; 964 } 965 /* Initialize rest of io_req fields */ 966 seq_clnp_req->sc_cmd = NULL; 967 seq_clnp_req->port = port; 968 seq_clnp_req->tgt = tgt; 969 seq_clnp_req->data_xfer_len = 0; /* No data transfer for cleanup */ 970 971 xid = seq_clnp_req->xid; 972 973 task_idx = xid/BNX2FC_TASKS_PER_PAGE; 974 index = xid % BNX2FC_TASKS_PER_PAGE; 975 976 /* Initialize task context for this IO request */ 977 task_page = (struct fcoe_task_ctx_entry *) 978 interface->hba->task_ctx[task_idx]; 979 task = &(task_page[index]); 980 cb_arg->aborted_io_req = orig_io_req; 981 cb_arg->io_req = seq_clnp_req; 982 cb_arg->r_ctl = r_ctl; 983 cb_arg->offset = offset; 984 seq_clnp_req->cb_arg = cb_arg; 985 986 printk(KERN_ERR PFX "call init_seq_cleanup_task\n"); 987 bnx2fc_init_seq_cleanup_task(seq_clnp_req, task, orig_io_req, offset); 988 989 /* Obtain free SQ entry */ 990 bnx2fc_add_2_sq(tgt, xid); 991 992 /* Ring doorbell */ 993 bnx2fc_ring_doorbell(tgt); 994 cleanup_err: 995 return rc; 996 } 997 998 int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req) 999 { 1000 struct bnx2fc_rport *tgt = io_req->tgt; 1001 struct bnx2fc_interface *interface; 1002 struct fcoe_port *port; 1003 struct bnx2fc_cmd *cleanup_io_req; 1004 struct fcoe_task_ctx_entry *task; 1005 struct fcoe_task_ctx_entry *task_page; 1006 int task_idx, index; 1007 u16 xid, orig_xid; 1008 int rc = 0; 1009 1010 /* ASSUMPTION: called with tgt_lock held */ 1011 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n"); 1012 1013 port = io_req->port; 1014 interface = port->priv; 1015 1016 cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP); 1017 if (!cleanup_io_req) { 1018 printk(KERN_ERR PFX "cleanup: couldn't allocate cmd\n"); 1019 rc = -1; 1020 goto cleanup_err; 1021 } 1022 1023 /* Initialize rest of io_req fields */ 1024 cleanup_io_req->sc_cmd = NULL; 1025 cleanup_io_req->port = port; 1026 cleanup_io_req->tgt = tgt; 1027 cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */ 1028 1029 xid = cleanup_io_req->xid; 1030 1031 task_idx = xid/BNX2FC_TASKS_PER_PAGE; 1032 index = xid % BNX2FC_TASKS_PER_PAGE; 1033 1034 /* Initialize task context for this IO request */ 1035 task_page = (struct fcoe_task_ctx_entry *) 1036 interface->hba->task_ctx[task_idx]; 1037 task = &(task_page[index]); 1038 orig_xid = io_req->xid; 1039 1040 BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid); 1041 1042 bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid); 1043 1044 /* Obtain free SQ entry */ 1045 bnx2fc_add_2_sq(tgt, xid); 1046 1047 /* Set flag that cleanup request is pending with the firmware */ 1048 set_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags); 1049 1050 /* Ring doorbell */ 1051 bnx2fc_ring_doorbell(tgt); 1052 1053 cleanup_err: 1054 return rc; 1055 } 1056 1057 /** 1058 * bnx2fc_eh_target_reset: Reset a target 1059 * 1060 * @sc_cmd: SCSI command 1061 * 1062 * Set from SCSI host template to send task mgmt command to the target 1063 * and wait for the response 1064 */ 1065 int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd) 1066 { 1067 return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET); 1068 } 1069 1070 /** 1071 * bnx2fc_eh_device_reset - Reset a single LUN 1072 * 1073 * @sc_cmd: SCSI command 1074 * 1075 * Set from SCSI host template to send task mgmt command to the target 1076 * and wait for the response 1077 */ 1078 int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd) 1079 { 1080 return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET); 1081 } 1082 1083 static int bnx2fc_abts_cleanup(struct bnx2fc_cmd *io_req) 1084 __must_hold(&tgt->tgt_lock) 1085 { 1086 struct bnx2fc_rport *tgt = io_req->tgt; 1087 unsigned int time_left; 1088 1089 init_completion(&io_req->cleanup_done); 1090 io_req->wait_for_cleanup_comp = 1; 1091 bnx2fc_initiate_cleanup(io_req); 1092 1093 spin_unlock_bh(&tgt->tgt_lock); 1094 1095 /* 1096 * Can't wait forever on cleanup response lest we let the SCSI error 1097 * handler wait forever 1098 */ 1099 time_left = wait_for_completion_timeout(&io_req->cleanup_done, 1100 BNX2FC_FW_TIMEOUT); 1101 if (!time_left) { 1102 BNX2FC_IO_DBG(io_req, "%s(): Wait for cleanup timed out.\n", 1103 __func__); 1104 1105 /* 1106 * Put the extra reference to the SCSI command since it would 1107 * not have been returned in this case. 1108 */ 1109 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1110 } 1111 1112 spin_lock_bh(&tgt->tgt_lock); 1113 io_req->wait_for_cleanup_comp = 0; 1114 return SUCCESS; 1115 } 1116 1117 /** 1118 * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding 1119 * SCSI command 1120 * 1121 * @sc_cmd: SCSI_ML command pointer 1122 * 1123 * SCSI abort request handler 1124 */ 1125 int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd) 1126 { 1127 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 1128 struct fc_rport_libfc_priv *rp = rport->dd_data; 1129 struct bnx2fc_cmd *io_req; 1130 struct fc_lport *lport; 1131 struct bnx2fc_rport *tgt; 1132 int rc; 1133 unsigned int time_left; 1134 1135 rc = fc_block_scsi_eh(sc_cmd); 1136 if (rc) 1137 return rc; 1138 1139 lport = shost_priv(sc_cmd->device->host); 1140 if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { 1141 printk(KERN_ERR PFX "eh_abort: link not ready\n"); 1142 return FAILED; 1143 } 1144 1145 tgt = (struct bnx2fc_rport *)&rp[1]; 1146 1147 BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n"); 1148 1149 spin_lock_bh(&tgt->tgt_lock); 1150 io_req = bnx2fc_priv(sc_cmd)->io_req; 1151 if (!io_req) { 1152 /* Command might have just completed */ 1153 printk(KERN_ERR PFX "eh_abort: io_req is NULL\n"); 1154 spin_unlock_bh(&tgt->tgt_lock); 1155 return SUCCESS; 1156 } 1157 BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n", 1158 kref_read(&io_req->refcount)); 1159 1160 /* Hold IO request across abort processing */ 1161 kref_get(&io_req->refcount); 1162 1163 BUG_ON(tgt != io_req->tgt); 1164 1165 /* Remove the io_req from the active_q. */ 1166 /* 1167 * Task Mgmt functions (LUN RESET & TGT RESET) will not 1168 * issue an ABTS on this particular IO req, as the 1169 * io_req is no longer in the active_q. 1170 */ 1171 if (tgt->flush_in_prog) { 1172 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1173 "flush in progress\n", io_req->xid); 1174 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1175 spin_unlock_bh(&tgt->tgt_lock); 1176 return SUCCESS; 1177 } 1178 1179 if (io_req->on_active_queue == 0) { 1180 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1181 "not on active_q\n", io_req->xid); 1182 /* 1183 * The IO is still with the FW. 1184 * Return failure and let SCSI-ml retry eh_abort. 1185 */ 1186 spin_unlock_bh(&tgt->tgt_lock); 1187 return FAILED; 1188 } 1189 1190 /* 1191 * Only eh_abort processing will remove the IO from 1192 * active_cmd_q before processing the request. this is 1193 * done to avoid race conditions between IOs aborted 1194 * as part of task management completion and eh_abort 1195 * processing 1196 */ 1197 list_del_init(&io_req->link); 1198 io_req->on_active_queue = 0; 1199 /* Move IO req to retire queue */ 1200 list_add_tail(&io_req->link, &tgt->io_retire_queue); 1201 1202 init_completion(&io_req->abts_done); 1203 init_completion(&io_req->cleanup_done); 1204 1205 if (test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { 1206 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1207 "already in abts processing\n", io_req->xid); 1208 if (cancel_delayed_work(&io_req->timeout_work)) 1209 kref_put(&io_req->refcount, 1210 bnx2fc_cmd_release); /* drop timer hold */ 1211 /* 1212 * We don't want to hold off the upper layer timer so simply 1213 * cleanup the command and return that I/O was successfully 1214 * aborted. 1215 */ 1216 bnx2fc_abts_cleanup(io_req); 1217 /* This only occurs when an task abort was requested while ABTS 1218 is in progress. Setting the IO_CLEANUP flag will skip the 1219 RRQ process in the case when the fw generated SCSI_CMD cmpl 1220 was a result from the ABTS request rather than the CLEANUP 1221 request */ 1222 set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags); 1223 rc = FAILED; 1224 goto done; 1225 } 1226 1227 /* Cancel the current timer running on this io_req */ 1228 if (cancel_delayed_work(&io_req->timeout_work)) 1229 kref_put(&io_req->refcount, 1230 bnx2fc_cmd_release); /* drop timer hold */ 1231 set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags); 1232 io_req->wait_for_abts_comp = 1; 1233 rc = bnx2fc_initiate_abts(io_req); 1234 if (rc == FAILED) { 1235 io_req->wait_for_cleanup_comp = 1; 1236 bnx2fc_initiate_cleanup(io_req); 1237 spin_unlock_bh(&tgt->tgt_lock); 1238 wait_for_completion(&io_req->cleanup_done); 1239 spin_lock_bh(&tgt->tgt_lock); 1240 io_req->wait_for_cleanup_comp = 0; 1241 goto done; 1242 } 1243 spin_unlock_bh(&tgt->tgt_lock); 1244 1245 /* Wait 2 * RA_TOV + 1 to be sure timeout function hasn't fired */ 1246 time_left = wait_for_completion_timeout(&io_req->abts_done, 1247 msecs_to_jiffies(2 * rp->r_a_tov + 1)); 1248 if (time_left) 1249 BNX2FC_IO_DBG(io_req, 1250 "Timed out in eh_abort waiting for abts_done"); 1251 1252 spin_lock_bh(&tgt->tgt_lock); 1253 io_req->wait_for_abts_comp = 0; 1254 if (test_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) { 1255 BNX2FC_IO_DBG(io_req, "IO completed in a different context\n"); 1256 rc = SUCCESS; 1257 } else if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 1258 &io_req->req_flags))) { 1259 /* Let the scsi-ml try to recover this command */ 1260 printk(KERN_ERR PFX "abort failed, xid = 0x%x\n", 1261 io_req->xid); 1262 /* 1263 * Cleanup firmware residuals before returning control back 1264 * to SCSI ML. 1265 */ 1266 rc = bnx2fc_abts_cleanup(io_req); 1267 goto done; 1268 } else { 1269 /* 1270 * We come here even when there was a race condition 1271 * between timeout and abts completion, and abts 1272 * completion happens just in time. 1273 */ 1274 BNX2FC_IO_DBG(io_req, "abort succeeded\n"); 1275 rc = SUCCESS; 1276 bnx2fc_scsi_done(io_req, DID_ABORT); 1277 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1278 } 1279 done: 1280 /* release the reference taken in eh_abort */ 1281 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1282 spin_unlock_bh(&tgt->tgt_lock); 1283 return rc; 1284 } 1285 1286 void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnp_req, 1287 struct fcoe_task_ctx_entry *task, 1288 u8 rx_state) 1289 { 1290 struct bnx2fc_els_cb_arg *cb_arg = seq_clnp_req->cb_arg; 1291 struct bnx2fc_cmd *orig_io_req = cb_arg->aborted_io_req; 1292 u32 offset = cb_arg->offset; 1293 enum fc_rctl r_ctl = cb_arg->r_ctl; 1294 int rc = 0; 1295 struct bnx2fc_rport *tgt = orig_io_req->tgt; 1296 1297 BNX2FC_IO_DBG(orig_io_req, "Entered process_cleanup_compl xid = 0x%x" 1298 "cmd_type = %d\n", 1299 seq_clnp_req->xid, seq_clnp_req->cmd_type); 1300 1301 if (rx_state == FCOE_TASK_RX_STATE_IGNORED_SEQUENCE_CLEANUP) { 1302 printk(KERN_ERR PFX "seq cleanup ignored - xid = 0x%x\n", 1303 seq_clnp_req->xid); 1304 goto free_cb_arg; 1305 } 1306 1307 spin_unlock_bh(&tgt->tgt_lock); 1308 rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl); 1309 spin_lock_bh(&tgt->tgt_lock); 1310 1311 if (rc) 1312 printk(KERN_ERR PFX "clnup_compl: Unable to send SRR" 1313 " IO will abort\n"); 1314 seq_clnp_req->cb_arg = NULL; 1315 kref_put(&orig_io_req->refcount, bnx2fc_cmd_release); 1316 free_cb_arg: 1317 kfree(cb_arg); 1318 return; 1319 } 1320 1321 void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req, 1322 struct fcoe_task_ctx_entry *task, 1323 u8 num_rq) 1324 { 1325 BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl " 1326 "refcnt = %d, cmd_type = %d\n", 1327 kref_read(&io_req->refcount), io_req->cmd_type); 1328 /* 1329 * Test whether there is a cleanup request pending. If not just 1330 * exit. 1331 */ 1332 if (!test_and_clear_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, 1333 &io_req->req_flags)) 1334 return; 1335 /* 1336 * If we receive a cleanup completion for this request then the 1337 * firmware will not give us an abort completion for this request 1338 * so clear any ABTS pending flags. 1339 */ 1340 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags) && 1341 !test_bit(BNX2FC_FLAG_ABTS_DONE, &io_req->req_flags)) { 1342 set_bit(BNX2FC_FLAG_ABTS_DONE, &io_req->req_flags); 1343 if (io_req->wait_for_abts_comp) 1344 complete(&io_req->abts_done); 1345 } 1346 1347 bnx2fc_scsi_done(io_req, DID_ERROR); 1348 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1349 if (io_req->wait_for_cleanup_comp) 1350 complete(&io_req->cleanup_done); 1351 } 1352 1353 void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req, 1354 struct fcoe_task_ctx_entry *task, 1355 u8 num_rq) 1356 { 1357 u32 r_ctl; 1358 u32 r_a_tov = FC_DEF_R_A_TOV; 1359 u8 issue_rrq = 0; 1360 struct bnx2fc_rport *tgt = io_req->tgt; 1361 1362 BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x" 1363 "refcnt = %d, cmd_type = %d\n", 1364 io_req->xid, 1365 kref_read(&io_req->refcount), io_req->cmd_type); 1366 1367 if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 1368 &io_req->req_flags)) { 1369 BNX2FC_IO_DBG(io_req, "Timer context finished processing" 1370 " this io\n"); 1371 return; 1372 } 1373 1374 /* 1375 * If we receive an ABTS completion here then we will not receive 1376 * a cleanup completion so clear any cleanup pending flags. 1377 */ 1378 if (test_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags)) { 1379 clear_bit(BNX2FC_FLAG_ISSUE_CLEANUP_REQ, &io_req->req_flags); 1380 if (io_req->wait_for_cleanup_comp) 1381 complete(&io_req->cleanup_done); 1382 } 1383 1384 /* Do not issue RRQ as this IO is already cleanedup */ 1385 if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP, 1386 &io_req->req_flags)) 1387 goto io_compl; 1388 1389 /* 1390 * For ABTS issued due to SCSI eh_abort_handler, timeout 1391 * values are maintained by scsi-ml itself. Cancel timeout 1392 * in case ABTS issued as part of task management function 1393 * or due to FW error. 1394 */ 1395 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) 1396 if (cancel_delayed_work(&io_req->timeout_work)) 1397 kref_put(&io_req->refcount, 1398 bnx2fc_cmd_release); /* drop timer hold */ 1399 1400 r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl; 1401 1402 switch (r_ctl) { 1403 case FC_RCTL_BA_ACC: 1404 /* 1405 * Dont release this cmd yet. It will be relesed 1406 * after we get RRQ response 1407 */ 1408 BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n"); 1409 issue_rrq = 1; 1410 break; 1411 1412 case FC_RCTL_BA_RJT: 1413 BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n"); 1414 break; 1415 default: 1416 printk(KERN_ERR PFX "Unknown ABTS response\n"); 1417 break; 1418 } 1419 1420 if (issue_rrq) { 1421 BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n"); 1422 set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags); 1423 } 1424 set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); 1425 bnx2fc_cmd_timer_set(io_req, r_a_tov); 1426 1427 io_compl: 1428 if (io_req->wait_for_abts_comp) { 1429 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, 1430 &io_req->req_flags)) 1431 complete(&io_req->abts_done); 1432 } else { 1433 /* 1434 * We end up here when ABTS is issued as 1435 * in asynchronous context, i.e., as part 1436 * of task management completion, or 1437 * when FW error is received or when the 1438 * ABTS is issued when the IO is timed 1439 * out. 1440 */ 1441 1442 if (io_req->on_active_queue) { 1443 list_del_init(&io_req->link); 1444 io_req->on_active_queue = 0; 1445 /* Move IO req to retire queue */ 1446 list_add_tail(&io_req->link, &tgt->io_retire_queue); 1447 } 1448 bnx2fc_scsi_done(io_req, DID_ERROR); 1449 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1450 } 1451 } 1452 1453 static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req) 1454 { 1455 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1456 struct bnx2fc_rport *tgt = io_req->tgt; 1457 struct bnx2fc_cmd *cmd, *tmp; 1458 u64 tm_lun = sc_cmd->device->lun; 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 IO 1466 * that matches with the LUN that was reset 1467 */ 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 lun = cmd->sc_cmd->device->lun; 1471 if (lun == tm_lun) { 1472 /* Initiate ABTS on this cmd */ 1473 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, 1474 &cmd->req_flags)) { 1475 /* cancel the IO timeout */ 1476 if (cancel_delayed_work(&io_req->timeout_work)) 1477 kref_put(&io_req->refcount, 1478 bnx2fc_cmd_release); 1479 /* timer hold */ 1480 rc = bnx2fc_initiate_abts(cmd); 1481 /* abts shouldn't fail in this context */ 1482 WARN_ON(rc != SUCCESS); 1483 } else 1484 printk(KERN_ERR PFX "lun_rst: abts already in" 1485 " progress for this IO 0x%x\n", 1486 cmd->xid); 1487 } 1488 } 1489 } 1490 1491 static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req) 1492 { 1493 struct bnx2fc_rport *tgt = io_req->tgt; 1494 struct bnx2fc_cmd *cmd, *tmp; 1495 int rc = 0; 1496 1497 /* called with tgt_lock held */ 1498 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n"); 1499 /* 1500 * Walk thru the active_ios queue and ABORT the IO 1501 * that matches with the LUN that was reset 1502 */ 1503 list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) { 1504 BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n"); 1505 /* Initiate ABTS */ 1506 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, 1507 &cmd->req_flags)) { 1508 /* cancel the IO timeout */ 1509 if (cancel_delayed_work(&io_req->timeout_work)) 1510 kref_put(&io_req->refcount, 1511 bnx2fc_cmd_release); /* timer hold */ 1512 rc = bnx2fc_initiate_abts(cmd); 1513 /* abts shouldn't fail in this context */ 1514 WARN_ON(rc != SUCCESS); 1515 1516 } else 1517 printk(KERN_ERR PFX "tgt_rst: abts already in progress" 1518 " for this IO 0x%x\n", cmd->xid); 1519 } 1520 } 1521 1522 void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req, 1523 struct fcoe_task_ctx_entry *task, u8 num_rq, 1524 unsigned char *rq_data) 1525 { 1526 struct bnx2fc_mp_req *tm_req; 1527 struct fc_frame_header *fc_hdr; 1528 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1529 u64 *hdr; 1530 u64 *temp_hdr; 1531 void *rsp_buf; 1532 1533 /* Called with tgt_lock held */ 1534 BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n"); 1535 1536 if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags))) 1537 set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags); 1538 else { 1539 /* TM has already timed out and we got 1540 * delayed completion. Ignore completion 1541 * processing. 1542 */ 1543 return; 1544 } 1545 1546 tm_req = &(io_req->mp_req); 1547 fc_hdr = &(tm_req->resp_fc_hdr); 1548 hdr = (u64 *)fc_hdr; 1549 temp_hdr = (u64 *) 1550 &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr; 1551 hdr[0] = cpu_to_be64(temp_hdr[0]); 1552 hdr[1] = cpu_to_be64(temp_hdr[1]); 1553 hdr[2] = cpu_to_be64(temp_hdr[2]); 1554 1555 tm_req->resp_len = 1556 task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len; 1557 1558 rsp_buf = tm_req->resp_buf; 1559 1560 if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) { 1561 bnx2fc_parse_fcp_rsp(io_req, 1562 (struct fcoe_fcp_rsp_payload *) 1563 rsp_buf, num_rq, rq_data); 1564 if (io_req->fcp_rsp_code == 0) { 1565 /* TM successful */ 1566 if (tm_req->tm_flags & FCP_TMF_LUN_RESET) 1567 bnx2fc_lun_reset_cmpl(io_req); 1568 else if (tm_req->tm_flags & FCP_TMF_TGT_RESET) 1569 bnx2fc_tgt_reset_cmpl(io_req); 1570 } 1571 } else { 1572 printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n", 1573 fc_hdr->fh_r_ctl); 1574 } 1575 if (!bnx2fc_priv(sc_cmd)->io_req) { 1576 printk(KERN_ERR PFX "tm_compl: io_req is NULL\n"); 1577 return; 1578 } 1579 switch (io_req->fcp_status) { 1580 case FC_GOOD: 1581 if (io_req->cdb_status == 0) { 1582 /* Good IO completion */ 1583 sc_cmd->result = DID_OK << 16; 1584 } else { 1585 /* Transport status is good, SCSI status not good */ 1586 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1587 } 1588 if (io_req->fcp_resid) 1589 scsi_set_resid(sc_cmd, io_req->fcp_resid); 1590 break; 1591 1592 default: 1593 BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n", 1594 io_req->fcp_status); 1595 break; 1596 } 1597 1598 sc_cmd = io_req->sc_cmd; 1599 io_req->sc_cmd = NULL; 1600 1601 /* check if the io_req exists in tgt's tmf_q */ 1602 if (io_req->on_tmf_queue) { 1603 1604 list_del_init(&io_req->link); 1605 io_req->on_tmf_queue = 0; 1606 } else { 1607 1608 printk(KERN_ERR PFX "Command not on active_cmd_queue!\n"); 1609 return; 1610 } 1611 1612 bnx2fc_priv(sc_cmd)->io_req = NULL; 1613 scsi_done(sc_cmd); 1614 1615 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1616 if (io_req->wait_for_abts_comp) { 1617 BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n"); 1618 complete(&io_req->abts_done); 1619 } 1620 } 1621 1622 static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, 1623 int bd_index) 1624 { 1625 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1626 int frag_size, sg_frags; 1627 1628 sg_frags = 0; 1629 while (sg_len) { 1630 if (sg_len >= BNX2FC_BD_SPLIT_SZ) 1631 frag_size = BNX2FC_BD_SPLIT_SZ; 1632 else 1633 frag_size = sg_len; 1634 bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff; 1635 bd[bd_index + sg_frags].buf_addr_hi = addr >> 32; 1636 bd[bd_index + sg_frags].buf_len = (u16)frag_size; 1637 bd[bd_index + sg_frags].flags = 0; 1638 1639 addr += (u64) frag_size; 1640 sg_frags++; 1641 sg_len -= frag_size; 1642 } 1643 return sg_frags; 1644 1645 } 1646 1647 static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req) 1648 { 1649 struct bnx2fc_interface *interface = io_req->port->priv; 1650 struct bnx2fc_hba *hba = interface->hba; 1651 struct scsi_cmnd *sc = io_req->sc_cmd; 1652 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1653 struct scatterlist *sg; 1654 int byte_count = 0; 1655 int sg_count = 0; 1656 int bd_count = 0; 1657 int sg_frags; 1658 unsigned int sg_len; 1659 u64 addr; 1660 int i; 1661 1662 WARN_ON(scsi_sg_count(sc) > BNX2FC_MAX_BDS_PER_CMD); 1663 /* 1664 * Use dma_map_sg directly to ensure we're using the correct 1665 * dev struct off of pcidev. 1666 */ 1667 sg_count = dma_map_sg(&hba->pcidev->dev, scsi_sglist(sc), 1668 scsi_sg_count(sc), sc->sc_data_direction); 1669 scsi_for_each_sg(sc, sg, sg_count, i) { 1670 sg_len = sg_dma_len(sg); 1671 addr = sg_dma_address(sg); 1672 if (sg_len > BNX2FC_MAX_BD_LEN) { 1673 sg_frags = bnx2fc_split_bd(io_req, addr, sg_len, 1674 bd_count); 1675 } else { 1676 1677 sg_frags = 1; 1678 bd[bd_count].buf_addr_lo = addr & 0xffffffff; 1679 bd[bd_count].buf_addr_hi = addr >> 32; 1680 bd[bd_count].buf_len = (u16)sg_len; 1681 bd[bd_count].flags = 0; 1682 } 1683 bd_count += sg_frags; 1684 byte_count += sg_len; 1685 } 1686 if (byte_count != scsi_bufflen(sc)) 1687 printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, " 1688 "task_id = 0x%x\n", byte_count, scsi_bufflen(sc), 1689 io_req->xid); 1690 return bd_count; 1691 } 1692 1693 static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req) 1694 { 1695 struct scsi_cmnd *sc = io_req->sc_cmd; 1696 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1697 int bd_count; 1698 1699 if (scsi_sg_count(sc)) { 1700 bd_count = bnx2fc_map_sg(io_req); 1701 if (bd_count == 0) 1702 return -ENOMEM; 1703 } else { 1704 bd_count = 0; 1705 bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0; 1706 bd[0].buf_len = bd[0].flags = 0; 1707 } 1708 io_req->bd_tbl->bd_valid = bd_count; 1709 1710 /* 1711 * Return the command to ML if BD count exceeds the max number 1712 * that can be handled by FW. 1713 */ 1714 if (bd_count > BNX2FC_FW_MAX_BDS_PER_CMD) { 1715 pr_err("bd_count = %d exceeded FW supported max BD(255), task_id = 0x%x\n", 1716 bd_count, io_req->xid); 1717 return -ENOMEM; 1718 } 1719 1720 return 0; 1721 } 1722 1723 static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req) 1724 { 1725 struct scsi_cmnd *sc = io_req->sc_cmd; 1726 struct bnx2fc_interface *interface = io_req->port->priv; 1727 struct bnx2fc_hba *hba = interface->hba; 1728 1729 /* 1730 * Use dma_unmap_sg directly to ensure we're using the correct 1731 * dev struct off of pcidev. 1732 */ 1733 if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) { 1734 dma_unmap_sg(&hba->pcidev->dev, scsi_sglist(sc), 1735 scsi_sg_count(sc), sc->sc_data_direction); 1736 io_req->bd_tbl->bd_valid = 0; 1737 } 1738 } 1739 1740 void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req, 1741 struct fcp_cmnd *fcp_cmnd) 1742 { 1743 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1744 1745 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); 1746 1747 int_to_scsilun(sc_cmd->device->lun, &fcp_cmnd->fc_lun); 1748 1749 fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len); 1750 memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len); 1751 1752 fcp_cmnd->fc_cmdref = 0; 1753 fcp_cmnd->fc_pri_ta = 0; 1754 fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags; 1755 fcp_cmnd->fc_flags = io_req->io_req_flags; 1756 fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE; 1757 } 1758 1759 static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, 1760 struct fcoe_fcp_rsp_payload *fcp_rsp, 1761 u8 num_rq, unsigned char *rq_data) 1762 { 1763 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1764 u8 rsp_flags = fcp_rsp->fcp_flags.flags; 1765 u32 rq_buff_len = 0; 1766 int fcp_sns_len = 0; 1767 int fcp_rsp_len = 0; 1768 1769 io_req->fcp_status = FC_GOOD; 1770 io_req->fcp_resid = 0; 1771 if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER | 1772 FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER)) 1773 io_req->fcp_resid = fcp_rsp->fcp_resid; 1774 1775 io_req->scsi_comp_flags = rsp_flags; 1776 io_req->cdb_status = fcp_rsp->scsi_status_code; 1777 1778 /* Fetch fcp_rsp_info and fcp_sns_info if available */ 1779 if (num_rq) { 1780 1781 /* 1782 * We do not anticipate num_rq >1, as the linux defined 1783 * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO 1784 * 256 bytes of single rq buffer is good enough to hold this. 1785 */ 1786 1787 if (rsp_flags & 1788 FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) { 1789 fcp_rsp_len = rq_buff_len 1790 = fcp_rsp->fcp_rsp_len; 1791 } 1792 1793 if (rsp_flags & 1794 FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) { 1795 fcp_sns_len = fcp_rsp->fcp_sns_len; 1796 rq_buff_len += fcp_rsp->fcp_sns_len; 1797 } 1798 1799 io_req->fcp_rsp_len = fcp_rsp_len; 1800 io_req->fcp_sns_len = fcp_sns_len; 1801 1802 if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) { 1803 /* Invalid sense sense length. */ 1804 printk(KERN_ERR PFX "invalid sns length %d\n", 1805 rq_buff_len); 1806 /* reset rq_buff_len */ 1807 rq_buff_len = num_rq * BNX2FC_RQ_BUF_SZ; 1808 } 1809 1810 /* fetch fcp_rsp_code */ 1811 if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) { 1812 /* Only for task management function */ 1813 io_req->fcp_rsp_code = rq_data[3]; 1814 BNX2FC_IO_DBG(io_req, "fcp_rsp_code = %d\n", 1815 io_req->fcp_rsp_code); 1816 } 1817 1818 /* fetch sense data */ 1819 rq_data += fcp_rsp_len; 1820 1821 if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) { 1822 printk(KERN_ERR PFX "Truncating sense buffer\n"); 1823 fcp_sns_len = SCSI_SENSE_BUFFERSIZE; 1824 } 1825 1826 memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1827 if (fcp_sns_len) 1828 memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len); 1829 1830 } 1831 } 1832 1833 /** 1834 * bnx2fc_queuecommand - Queuecommand function of the scsi template 1835 * 1836 * @host: The Scsi_Host the command was issued to 1837 * @sc_cmd: struct scsi_cmnd to be executed 1838 * 1839 * This is the IO strategy routine, called by SCSI-ML 1840 **/ 1841 int bnx2fc_queuecommand(struct Scsi_Host *host, 1842 struct scsi_cmnd *sc_cmd) 1843 { 1844 struct fc_lport *lport = shost_priv(host); 1845 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 1846 struct fc_rport_libfc_priv *rp = rport->dd_data; 1847 struct bnx2fc_rport *tgt; 1848 struct bnx2fc_cmd *io_req; 1849 int rc = 0; 1850 int rval; 1851 1852 rval = fc_remote_port_chkready(rport); 1853 if (rval) { 1854 sc_cmd->result = rval; 1855 scsi_done(sc_cmd); 1856 return 0; 1857 } 1858 1859 if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { 1860 rc = SCSI_MLQUEUE_HOST_BUSY; 1861 goto exit_qcmd; 1862 } 1863 1864 /* rport and tgt are allocated together, so tgt should be non-NULL */ 1865 tgt = (struct bnx2fc_rport *)&rp[1]; 1866 1867 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { 1868 /* 1869 * Session is not offloaded yet. Let SCSI-ml retry 1870 * the command. 1871 */ 1872 rc = SCSI_MLQUEUE_TARGET_BUSY; 1873 goto exit_qcmd; 1874 } 1875 if (tgt->retry_delay_timestamp) { 1876 if (time_after(jiffies, tgt->retry_delay_timestamp)) { 1877 tgt->retry_delay_timestamp = 0; 1878 } else { 1879 /* If retry_delay timer is active, flow off the ML */ 1880 rc = SCSI_MLQUEUE_TARGET_BUSY; 1881 goto exit_qcmd; 1882 } 1883 } 1884 1885 spin_lock_bh(&tgt->tgt_lock); 1886 1887 io_req = bnx2fc_cmd_alloc(tgt); 1888 if (!io_req) { 1889 rc = SCSI_MLQUEUE_HOST_BUSY; 1890 goto exit_qcmd_tgtlock; 1891 } 1892 io_req->sc_cmd = sc_cmd; 1893 1894 if (bnx2fc_post_io_req(tgt, io_req)) { 1895 printk(KERN_ERR PFX "Unable to post io_req\n"); 1896 rc = SCSI_MLQUEUE_HOST_BUSY; 1897 goto exit_qcmd_tgtlock; 1898 } 1899 1900 exit_qcmd_tgtlock: 1901 spin_unlock_bh(&tgt->tgt_lock); 1902 exit_qcmd: 1903 return rc; 1904 } 1905 1906 void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req, 1907 struct fcoe_task_ctx_entry *task, 1908 u8 num_rq, unsigned char *rq_data) 1909 { 1910 struct fcoe_fcp_rsp_payload *fcp_rsp; 1911 struct bnx2fc_rport *tgt = io_req->tgt; 1912 struct scsi_cmnd *sc_cmd; 1913 u16 scope = 0, qualifier = 0; 1914 1915 /* scsi_cmd_cmpl is called with tgt lock held */ 1916 1917 if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) { 1918 /* we will not receive ABTS response for this IO */ 1919 BNX2FC_IO_DBG(io_req, "Timer context finished processing " 1920 "this scsi cmd\n"); 1921 if (test_and_clear_bit(BNX2FC_FLAG_IO_CLEANUP, 1922 &io_req->req_flags)) { 1923 BNX2FC_IO_DBG(io_req, 1924 "Actual completion after cleanup request cleaning up\n"); 1925 bnx2fc_process_cleanup_compl(io_req, task, num_rq); 1926 } 1927 return; 1928 } 1929 1930 /* Cancel the timeout_work, as we received IO completion */ 1931 if (cancel_delayed_work(&io_req->timeout_work)) 1932 kref_put(&io_req->refcount, 1933 bnx2fc_cmd_release); /* drop timer hold */ 1934 1935 sc_cmd = io_req->sc_cmd; 1936 if (sc_cmd == NULL) { 1937 printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n"); 1938 return; 1939 } 1940 1941 /* Fetch fcp_rsp from task context and perform cmd completion */ 1942 fcp_rsp = (struct fcoe_fcp_rsp_payload *) 1943 &(task->rxwr_only.union_ctx.comp_info.fcp_rsp.payload); 1944 1945 /* parse fcp_rsp and obtain sense data from RQ if available */ 1946 bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq, rq_data); 1947 1948 if (!bnx2fc_priv(sc_cmd)->io_req) { 1949 printk(KERN_ERR PFX "io_req is NULL\n"); 1950 return; 1951 } 1952 1953 if (io_req->on_active_queue) { 1954 list_del_init(&io_req->link); 1955 io_req->on_active_queue = 0; 1956 /* Move IO req to retire queue */ 1957 list_add_tail(&io_req->link, &tgt->io_retire_queue); 1958 } else { 1959 /* This should not happen, but could have been pulled 1960 * by bnx2fc_flush_active_ios(), or during a race 1961 * between command abort and (late) completion. 1962 */ 1963 BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n"); 1964 if (io_req->wait_for_abts_comp) 1965 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, 1966 &io_req->req_flags)) 1967 complete(&io_req->abts_done); 1968 } 1969 1970 bnx2fc_unmap_sg_list(io_req); 1971 io_req->sc_cmd = NULL; 1972 1973 switch (io_req->fcp_status) { 1974 case FC_GOOD: 1975 if (io_req->cdb_status == 0) { 1976 /* Good IO completion */ 1977 sc_cmd->result = DID_OK << 16; 1978 } else { 1979 /* Transport status is good, SCSI status not good */ 1980 BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d" 1981 " fcp_resid = 0x%x\n", 1982 io_req->cdb_status, io_req->fcp_resid); 1983 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1984 1985 if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL || 1986 io_req->cdb_status == SAM_STAT_BUSY) { 1987 /* Newer array firmware with BUSY or 1988 * TASK_SET_FULL may return a status that needs 1989 * the scope bits masked. 1990 * Or a huge delay timestamp up to 27 minutes 1991 * can result. 1992 */ 1993 if (fcp_rsp->retry_delay_timer) { 1994 /* Upper 2 bits */ 1995 scope = fcp_rsp->retry_delay_timer 1996 & 0xC000; 1997 /* Lower 14 bits */ 1998 qualifier = fcp_rsp->retry_delay_timer 1999 & 0x3FFF; 2000 } 2001 if (scope > 0 && qualifier > 0 && 2002 qualifier <= 0x3FEF) { 2003 /* Set the jiffies + 2004 * retry_delay_timer * 100ms 2005 * for the rport/tgt 2006 */ 2007 tgt->retry_delay_timestamp = jiffies + 2008 (qualifier * HZ / 10); 2009 } 2010 } 2011 } 2012 if (io_req->fcp_resid) 2013 scsi_set_resid(sc_cmd, io_req->fcp_resid); 2014 break; 2015 default: 2016 printk(KERN_ERR PFX "scsi_cmd_compl: fcp_status = %d\n", 2017 io_req->fcp_status); 2018 break; 2019 } 2020 bnx2fc_priv(sc_cmd)->io_req = NULL; 2021 scsi_done(sc_cmd); 2022 kref_put(&io_req->refcount, bnx2fc_cmd_release); 2023 } 2024 2025 int bnx2fc_post_io_req(struct bnx2fc_rport *tgt, 2026 struct bnx2fc_cmd *io_req) 2027 { 2028 struct fcoe_task_ctx_entry *task; 2029 struct fcoe_task_ctx_entry *task_page; 2030 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 2031 struct fcoe_port *port = tgt->port; 2032 struct bnx2fc_interface *interface = port->priv; 2033 struct bnx2fc_hba *hba = interface->hba; 2034 struct fc_lport *lport = port->lport; 2035 struct fc_stats *stats; 2036 int task_idx, index; 2037 u16 xid; 2038 2039 /* bnx2fc_post_io_req() is called with the tgt_lock held */ 2040 2041 /* Initialize rest of io_req fields */ 2042 io_req->cmd_type = BNX2FC_SCSI_CMD; 2043 io_req->port = port; 2044 io_req->tgt = tgt; 2045 io_req->data_xfer_len = scsi_bufflen(sc_cmd); 2046 bnx2fc_priv(sc_cmd)->io_req = io_req; 2047 2048 stats = per_cpu_ptr(lport->stats, get_cpu()); 2049 if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) { 2050 io_req->io_req_flags = BNX2FC_READ; 2051 stats->InputRequests++; 2052 stats->InputBytes += io_req->data_xfer_len; 2053 } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { 2054 io_req->io_req_flags = BNX2FC_WRITE; 2055 stats->OutputRequests++; 2056 stats->OutputBytes += io_req->data_xfer_len; 2057 } else { 2058 io_req->io_req_flags = 0; 2059 stats->ControlRequests++; 2060 } 2061 put_cpu(); 2062 2063 xid = io_req->xid; 2064 2065 /* Build buffer descriptor list for firmware from sg list */ 2066 if (bnx2fc_build_bd_list_from_sg(io_req)) { 2067 printk(KERN_ERR PFX "BD list creation failed\n"); 2068 kref_put(&io_req->refcount, bnx2fc_cmd_release); 2069 return -EAGAIN; 2070 } 2071 2072 task_idx = xid / BNX2FC_TASKS_PER_PAGE; 2073 index = xid % BNX2FC_TASKS_PER_PAGE; 2074 2075 /* Initialize task context for this IO request */ 2076 task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx]; 2077 task = &(task_page[index]); 2078 bnx2fc_init_task(io_req, task); 2079 2080 if (tgt->flush_in_prog) { 2081 printk(KERN_ERR PFX "Flush in progress..Host Busy\n"); 2082 kref_put(&io_req->refcount, bnx2fc_cmd_release); 2083 return -EAGAIN; 2084 } 2085 2086 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { 2087 printk(KERN_ERR PFX "Session not ready...post_io\n"); 2088 kref_put(&io_req->refcount, bnx2fc_cmd_release); 2089 return -EAGAIN; 2090 } 2091 2092 /* Time IO req */ 2093 if (tgt->io_timeout) 2094 bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT); 2095 /* Obtain free SQ entry */ 2096 bnx2fc_add_2_sq(tgt, xid); 2097 2098 /* Enqueue the io_req to active_cmd_queue */ 2099 2100 io_req->on_active_queue = 1; 2101 /* move io_req from pending_queue to active_queue */ 2102 list_add_tail(&io_req->link, &tgt->active_cmd_queue); 2103 2104 /* Ring doorbell */ 2105 bnx2fc_ring_doorbell(tgt); 2106 return 0; 2107 } 2108