1 /* bnx2fc_io.c: Broadcom NetXtreme II Linux FCoE offload driver. 2 * IO manager and SCSI IO processing. 3 * 4 * Copyright (c) 2008 - 2013 Broadcom Corporation 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation. 9 * 10 * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com) 11 */ 12 13 #include "bnx2fc.h" 14 15 #define RESERVE_FREE_LIST_INDEX num_possible_cpus() 16 17 static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, 18 int bd_index); 19 static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req); 20 static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req); 21 static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req); 22 static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req); 23 static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, 24 struct fcoe_fcp_rsp_payload *fcp_rsp, 25 u8 num_rq); 26 27 void bnx2fc_cmd_timer_set(struct bnx2fc_cmd *io_req, 28 unsigned int timer_msec) 29 { 30 struct bnx2fc_interface *interface = io_req->port->priv; 31 32 if (queue_delayed_work(interface->timer_work_queue, 33 &io_req->timeout_work, 34 msecs_to_jiffies(timer_msec))) 35 kref_get(&io_req->refcount); 36 } 37 38 static void bnx2fc_cmd_timeout(struct work_struct *work) 39 { 40 struct bnx2fc_cmd *io_req = container_of(work, struct bnx2fc_cmd, 41 timeout_work.work); 42 struct fc_lport *lport; 43 struct fc_rport_priv *rdata; 44 u8 cmd_type = io_req->cmd_type; 45 struct bnx2fc_rport *tgt = io_req->tgt; 46 int logo_issued; 47 int rc; 48 49 BNX2FC_IO_DBG(io_req, "cmd_timeout, cmd_type = %d," 50 "req_flags = %lx\n", cmd_type, io_req->req_flags); 51 52 spin_lock_bh(&tgt->tgt_lock); 53 if (test_and_clear_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags)) { 54 clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); 55 /* 56 * ideally we should hold the io_req until RRQ complets, 57 * and release io_req from timeout hold. 58 */ 59 spin_unlock_bh(&tgt->tgt_lock); 60 bnx2fc_send_rrq(io_req); 61 return; 62 } 63 if (test_and_clear_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags)) { 64 BNX2FC_IO_DBG(io_req, "IO ready for reuse now\n"); 65 goto done; 66 } 67 68 switch (cmd_type) { 69 case BNX2FC_SCSI_CMD: 70 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, 71 &io_req->req_flags)) { 72 /* Handle eh_abort timeout */ 73 BNX2FC_IO_DBG(io_req, "eh_abort timed out\n"); 74 complete(&io_req->tm_done); 75 } else if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, 76 &io_req->req_flags)) { 77 /* Handle internally generated ABTS timeout */ 78 BNX2FC_IO_DBG(io_req, "ABTS timed out refcnt = %d\n", 79 io_req->refcount.refcount.counter); 80 if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 81 &io_req->req_flags))) { 82 83 lport = io_req->port->lport; 84 rdata = io_req->tgt->rdata; 85 logo_issued = test_and_set_bit( 86 BNX2FC_FLAG_EXPL_LOGO, 87 &tgt->flags); 88 kref_put(&io_req->refcount, bnx2fc_cmd_release); 89 spin_unlock_bh(&tgt->tgt_lock); 90 91 /* Explicitly logo the target */ 92 if (!logo_issued) { 93 BNX2FC_IO_DBG(io_req, "Explicit " 94 "logo - tgt flags = 0x%lx\n", 95 tgt->flags); 96 97 mutex_lock(&lport->disc.disc_mutex); 98 lport->tt.rport_logoff(rdata); 99 mutex_unlock(&lport->disc.disc_mutex); 100 } 101 return; 102 } 103 } else { 104 /* Hanlde IO timeout */ 105 BNX2FC_IO_DBG(io_req, "IO timed out. issue ABTS\n"); 106 if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, 107 &io_req->req_flags)) { 108 BNX2FC_IO_DBG(io_req, "IO completed before " 109 " timer expiry\n"); 110 goto done; 111 } 112 113 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, 114 &io_req->req_flags)) { 115 rc = bnx2fc_initiate_abts(io_req); 116 if (rc == SUCCESS) 117 goto done; 118 /* 119 * Explicitly logo the target if 120 * abts initiation fails 121 */ 122 lport = io_req->port->lport; 123 rdata = io_req->tgt->rdata; 124 logo_issued = test_and_set_bit( 125 BNX2FC_FLAG_EXPL_LOGO, 126 &tgt->flags); 127 kref_put(&io_req->refcount, bnx2fc_cmd_release); 128 spin_unlock_bh(&tgt->tgt_lock); 129 130 if (!logo_issued) { 131 BNX2FC_IO_DBG(io_req, "Explicit " 132 "logo - tgt flags = 0x%lx\n", 133 tgt->flags); 134 135 136 mutex_lock(&lport->disc.disc_mutex); 137 lport->tt.rport_logoff(rdata); 138 mutex_unlock(&lport->disc.disc_mutex); 139 } 140 return; 141 } else { 142 BNX2FC_IO_DBG(io_req, "IO already in " 143 "ABTS processing\n"); 144 } 145 } 146 break; 147 case BNX2FC_ELS: 148 149 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { 150 BNX2FC_IO_DBG(io_req, "ABTS for ELS timed out\n"); 151 152 if (!test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 153 &io_req->req_flags)) { 154 lport = io_req->port->lport; 155 rdata = io_req->tgt->rdata; 156 logo_issued = test_and_set_bit( 157 BNX2FC_FLAG_EXPL_LOGO, 158 &tgt->flags); 159 kref_put(&io_req->refcount, bnx2fc_cmd_release); 160 spin_unlock_bh(&tgt->tgt_lock); 161 162 /* Explicitly logo the target */ 163 if (!logo_issued) { 164 BNX2FC_IO_DBG(io_req, "Explicitly logo" 165 "(els)\n"); 166 mutex_lock(&lport->disc.disc_mutex); 167 lport->tt.rport_logoff(rdata); 168 mutex_unlock(&lport->disc.disc_mutex); 169 } 170 return; 171 } 172 } else { 173 /* 174 * Handle ELS timeout. 175 * tgt_lock is used to sync compl path and timeout 176 * path. If els compl path is processing this IO, we 177 * have nothing to do here, just release the timer hold 178 */ 179 BNX2FC_IO_DBG(io_req, "ELS timed out\n"); 180 if (test_and_set_bit(BNX2FC_FLAG_ELS_DONE, 181 &io_req->req_flags)) 182 goto done; 183 184 /* Indicate the cb_func that this ELS is timed out */ 185 set_bit(BNX2FC_FLAG_ELS_TIMEOUT, &io_req->req_flags); 186 187 if ((io_req->cb_func) && (io_req->cb_arg)) { 188 io_req->cb_func(io_req->cb_arg); 189 io_req->cb_arg = NULL; 190 } 191 } 192 break; 193 default: 194 printk(KERN_ERR PFX "cmd_timeout: invalid cmd_type %d\n", 195 cmd_type); 196 break; 197 } 198 199 done: 200 /* release the cmd that was held when timer was set */ 201 kref_put(&io_req->refcount, bnx2fc_cmd_release); 202 spin_unlock_bh(&tgt->tgt_lock); 203 } 204 205 static void bnx2fc_scsi_done(struct bnx2fc_cmd *io_req, int err_code) 206 { 207 /* Called with host lock held */ 208 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 209 210 /* 211 * active_cmd_queue may have other command types as well, 212 * and during flush operation, we want to error back only 213 * scsi commands. 214 */ 215 if (io_req->cmd_type != BNX2FC_SCSI_CMD) 216 return; 217 218 BNX2FC_IO_DBG(io_req, "scsi_done. err_code = 0x%x\n", err_code); 219 if (test_bit(BNX2FC_FLAG_CMD_LOST, &io_req->req_flags)) { 220 /* Do not call scsi done for this IO */ 221 return; 222 } 223 224 bnx2fc_unmap_sg_list(io_req); 225 io_req->sc_cmd = NULL; 226 if (!sc_cmd) { 227 printk(KERN_ERR PFX "scsi_done - sc_cmd NULL. " 228 "IO(0x%x) already cleaned up\n", 229 io_req->xid); 230 return; 231 } 232 sc_cmd->result = err_code << 16; 233 234 BNX2FC_IO_DBG(io_req, "sc=%p, result=0x%x, retries=%d, allowed=%d\n", 235 sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries, 236 sc_cmd->allowed); 237 scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); 238 sc_cmd->SCp.ptr = NULL; 239 sc_cmd->scsi_done(sc_cmd); 240 } 241 242 struct bnx2fc_cmd_mgr *bnx2fc_cmd_mgr_alloc(struct bnx2fc_hba *hba) 243 { 244 struct bnx2fc_cmd_mgr *cmgr; 245 struct io_bdt *bdt_info; 246 struct bnx2fc_cmd *io_req; 247 size_t len; 248 u32 mem_size; 249 u16 xid; 250 int i; 251 int num_ios, num_pri_ios; 252 size_t bd_tbl_sz; 253 int arr_sz = num_possible_cpus() + 1; 254 u16 min_xid = BNX2FC_MIN_XID; 255 u16 max_xid = hba->max_xid; 256 257 if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) { 258 printk(KERN_ERR PFX "cmd_mgr_alloc: Invalid min_xid 0x%x \ 259 and max_xid 0x%x\n", min_xid, max_xid); 260 return NULL; 261 } 262 BNX2FC_MISC_DBG("min xid 0x%x, max xid 0x%x\n", min_xid, max_xid); 263 264 num_ios = max_xid - min_xid + 1; 265 len = (num_ios * (sizeof(struct bnx2fc_cmd *))); 266 len += sizeof(struct bnx2fc_cmd_mgr); 267 268 cmgr = kzalloc(len, GFP_KERNEL); 269 if (!cmgr) { 270 printk(KERN_ERR PFX "failed to alloc cmgr\n"); 271 return NULL; 272 } 273 274 cmgr->free_list = kzalloc(sizeof(*cmgr->free_list) * 275 arr_sz, GFP_KERNEL); 276 if (!cmgr->free_list) { 277 printk(KERN_ERR PFX "failed to alloc free_list\n"); 278 goto mem_err; 279 } 280 281 cmgr->free_list_lock = kzalloc(sizeof(*cmgr->free_list_lock) * 282 arr_sz, GFP_KERNEL); 283 if (!cmgr->free_list_lock) { 284 printk(KERN_ERR PFX "failed to alloc free_list_lock\n"); 285 goto mem_err; 286 } 287 288 cmgr->hba = hba; 289 cmgr->cmds = (struct bnx2fc_cmd **)(cmgr + 1); 290 291 for (i = 0; i < arr_sz; i++) { 292 INIT_LIST_HEAD(&cmgr->free_list[i]); 293 spin_lock_init(&cmgr->free_list_lock[i]); 294 } 295 296 /* 297 * Pre-allocated pool of bnx2fc_cmds. 298 * Last entry in the free list array is the free list 299 * of slow path requests. 300 */ 301 xid = BNX2FC_MIN_XID; 302 num_pri_ios = num_ios - hba->elstm_xids; 303 for (i = 0; i < num_ios; i++) { 304 io_req = kzalloc(sizeof(*io_req), GFP_KERNEL); 305 306 if (!io_req) { 307 printk(KERN_ERR PFX "failed to alloc io_req\n"); 308 goto mem_err; 309 } 310 311 INIT_LIST_HEAD(&io_req->link); 312 INIT_DELAYED_WORK(&io_req->timeout_work, bnx2fc_cmd_timeout); 313 314 io_req->xid = xid++; 315 if (i < num_pri_ios) 316 list_add_tail(&io_req->link, 317 &cmgr->free_list[io_req->xid % 318 num_possible_cpus()]); 319 else 320 list_add_tail(&io_req->link, 321 &cmgr->free_list[num_possible_cpus()]); 322 io_req++; 323 } 324 325 /* Allocate pool of io_bdts - one for each bnx2fc_cmd */ 326 mem_size = num_ios * sizeof(struct io_bdt *); 327 cmgr->io_bdt_pool = kmalloc(mem_size, GFP_KERNEL); 328 if (!cmgr->io_bdt_pool) { 329 printk(KERN_ERR PFX "failed to alloc io_bdt_pool\n"); 330 goto mem_err; 331 } 332 333 mem_size = sizeof(struct io_bdt); 334 for (i = 0; i < num_ios; i++) { 335 cmgr->io_bdt_pool[i] = kmalloc(mem_size, GFP_KERNEL); 336 if (!cmgr->io_bdt_pool[i]) { 337 printk(KERN_ERR PFX "failed to alloc " 338 "io_bdt_pool[%d]\n", i); 339 goto mem_err; 340 } 341 } 342 343 /* Allocate an map fcoe_bdt_ctx structures */ 344 bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx); 345 for (i = 0; i < num_ios; i++) { 346 bdt_info = cmgr->io_bdt_pool[i]; 347 bdt_info->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, 348 bd_tbl_sz, 349 &bdt_info->bd_tbl_dma, 350 GFP_KERNEL); 351 if (!bdt_info->bd_tbl) { 352 printk(KERN_ERR PFX "failed to alloc " 353 "bdt_tbl[%d]\n", i); 354 goto mem_err; 355 } 356 } 357 358 return cmgr; 359 360 mem_err: 361 bnx2fc_cmd_mgr_free(cmgr); 362 return NULL; 363 } 364 365 void bnx2fc_cmd_mgr_free(struct bnx2fc_cmd_mgr *cmgr) 366 { 367 struct io_bdt *bdt_info; 368 struct bnx2fc_hba *hba = cmgr->hba; 369 size_t bd_tbl_sz; 370 u16 min_xid = BNX2FC_MIN_XID; 371 u16 max_xid = hba->max_xid; 372 int num_ios; 373 int i; 374 375 num_ios = max_xid - min_xid + 1; 376 377 /* Free fcoe_bdt_ctx structures */ 378 if (!cmgr->io_bdt_pool) 379 goto free_cmd_pool; 380 381 bd_tbl_sz = BNX2FC_MAX_BDS_PER_CMD * sizeof(struct fcoe_bd_ctx); 382 for (i = 0; i < num_ios; i++) { 383 bdt_info = cmgr->io_bdt_pool[i]; 384 if (bdt_info->bd_tbl) { 385 dma_free_coherent(&hba->pcidev->dev, bd_tbl_sz, 386 bdt_info->bd_tbl, 387 bdt_info->bd_tbl_dma); 388 bdt_info->bd_tbl = NULL; 389 } 390 } 391 392 /* Destroy io_bdt pool */ 393 for (i = 0; i < num_ios; i++) { 394 kfree(cmgr->io_bdt_pool[i]); 395 cmgr->io_bdt_pool[i] = NULL; 396 } 397 398 kfree(cmgr->io_bdt_pool); 399 cmgr->io_bdt_pool = NULL; 400 401 free_cmd_pool: 402 kfree(cmgr->free_list_lock); 403 404 /* Destroy cmd pool */ 405 if (!cmgr->free_list) 406 goto free_cmgr; 407 408 for (i = 0; i < num_possible_cpus() + 1; i++) { 409 struct bnx2fc_cmd *tmp, *io_req; 410 411 list_for_each_entry_safe(io_req, tmp, 412 &cmgr->free_list[i], link) { 413 list_del(&io_req->link); 414 kfree(io_req); 415 } 416 } 417 kfree(cmgr->free_list); 418 free_cmgr: 419 /* Free command manager itself */ 420 kfree(cmgr); 421 } 422 423 struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type) 424 { 425 struct fcoe_port *port = tgt->port; 426 struct bnx2fc_interface *interface = port->priv; 427 struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr; 428 struct bnx2fc_cmd *io_req; 429 struct list_head *listp; 430 struct io_bdt *bd_tbl; 431 int index = RESERVE_FREE_LIST_INDEX; 432 u32 free_sqes; 433 u32 max_sqes; 434 u16 xid; 435 436 max_sqes = tgt->max_sqes; 437 switch (type) { 438 case BNX2FC_TASK_MGMT_CMD: 439 max_sqes = BNX2FC_TM_MAX_SQES; 440 break; 441 case BNX2FC_ELS: 442 max_sqes = BNX2FC_ELS_MAX_SQES; 443 break; 444 default: 445 break; 446 } 447 448 /* 449 * NOTE: Free list insertions and deletions are protected with 450 * cmgr lock 451 */ 452 spin_lock_bh(&cmd_mgr->free_list_lock[index]); 453 free_sqes = atomic_read(&tgt->free_sqes); 454 if ((list_empty(&(cmd_mgr->free_list[index]))) || 455 (tgt->num_active_ios.counter >= max_sqes) || 456 (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) { 457 BNX2FC_TGT_DBG(tgt, "No free els_tm cmds available " 458 "ios(%d):sqes(%d)\n", 459 tgt->num_active_ios.counter, tgt->max_sqes); 460 if (list_empty(&(cmd_mgr->free_list[index]))) 461 printk(KERN_ERR PFX "elstm_alloc: list_empty\n"); 462 spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 463 return NULL; 464 } 465 466 listp = (struct list_head *) 467 cmd_mgr->free_list[index].next; 468 list_del_init(listp); 469 io_req = (struct bnx2fc_cmd *) listp; 470 xid = io_req->xid; 471 cmd_mgr->cmds[xid] = io_req; 472 atomic_inc(&tgt->num_active_ios); 473 atomic_dec(&tgt->free_sqes); 474 spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 475 476 INIT_LIST_HEAD(&io_req->link); 477 478 io_req->port = port; 479 io_req->cmd_mgr = cmd_mgr; 480 io_req->req_flags = 0; 481 io_req->cmd_type = type; 482 483 /* Bind io_bdt for this io_req */ 484 /* Have a static link between io_req and io_bdt_pool */ 485 bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; 486 bd_tbl->io_req = io_req; 487 488 /* Hold the io_req against deletion */ 489 kref_init(&io_req->refcount); 490 return io_req; 491 } 492 493 struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt) 494 { 495 struct fcoe_port *port = tgt->port; 496 struct bnx2fc_interface *interface = port->priv; 497 struct bnx2fc_cmd_mgr *cmd_mgr = interface->hba->cmd_mgr; 498 struct bnx2fc_cmd *io_req; 499 struct list_head *listp; 500 struct io_bdt *bd_tbl; 501 u32 free_sqes; 502 u32 max_sqes; 503 u16 xid; 504 int index = get_cpu(); 505 506 max_sqes = BNX2FC_SCSI_MAX_SQES; 507 /* 508 * NOTE: Free list insertions and deletions are protected with 509 * cmgr lock 510 */ 511 spin_lock_bh(&cmd_mgr->free_list_lock[index]); 512 free_sqes = atomic_read(&tgt->free_sqes); 513 if ((list_empty(&cmd_mgr->free_list[index])) || 514 (tgt->num_active_ios.counter >= max_sqes) || 515 (free_sqes + max_sqes <= BNX2FC_SQ_WQES_MAX)) { 516 spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 517 put_cpu(); 518 return NULL; 519 } 520 521 listp = (struct list_head *) 522 cmd_mgr->free_list[index].next; 523 list_del_init(listp); 524 io_req = (struct bnx2fc_cmd *) listp; 525 xid = io_req->xid; 526 cmd_mgr->cmds[xid] = io_req; 527 atomic_inc(&tgt->num_active_ios); 528 atomic_dec(&tgt->free_sqes); 529 spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 530 put_cpu(); 531 532 INIT_LIST_HEAD(&io_req->link); 533 534 io_req->port = port; 535 io_req->cmd_mgr = cmd_mgr; 536 io_req->req_flags = 0; 537 538 /* Bind io_bdt for this io_req */ 539 /* Have a static link between io_req and io_bdt_pool */ 540 bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; 541 bd_tbl->io_req = io_req; 542 543 /* Hold the io_req against deletion */ 544 kref_init(&io_req->refcount); 545 return io_req; 546 } 547 548 void bnx2fc_cmd_release(struct kref *ref) 549 { 550 struct bnx2fc_cmd *io_req = container_of(ref, 551 struct bnx2fc_cmd, refcount); 552 struct bnx2fc_cmd_mgr *cmd_mgr = io_req->cmd_mgr; 553 int index; 554 555 if (io_req->cmd_type == BNX2FC_SCSI_CMD) 556 index = io_req->xid % num_possible_cpus(); 557 else 558 index = RESERVE_FREE_LIST_INDEX; 559 560 561 spin_lock_bh(&cmd_mgr->free_list_lock[index]); 562 if (io_req->cmd_type != BNX2FC_SCSI_CMD) 563 bnx2fc_free_mp_resc(io_req); 564 cmd_mgr->cmds[io_req->xid] = NULL; 565 /* Delete IO from retire queue */ 566 list_del_init(&io_req->link); 567 /* Add it to the free list */ 568 list_add(&io_req->link, 569 &cmd_mgr->free_list[index]); 570 atomic_dec(&io_req->tgt->num_active_ios); 571 spin_unlock_bh(&cmd_mgr->free_list_lock[index]); 572 573 } 574 575 static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req) 576 { 577 struct bnx2fc_mp_req *mp_req = &(io_req->mp_req); 578 struct bnx2fc_interface *interface = io_req->port->priv; 579 struct bnx2fc_hba *hba = interface->hba; 580 size_t sz = sizeof(struct fcoe_bd_ctx); 581 582 /* clear tm flags */ 583 mp_req->tm_flags = 0; 584 if (mp_req->mp_req_bd) { 585 dma_free_coherent(&hba->pcidev->dev, sz, 586 mp_req->mp_req_bd, 587 mp_req->mp_req_bd_dma); 588 mp_req->mp_req_bd = NULL; 589 } 590 if (mp_req->mp_resp_bd) { 591 dma_free_coherent(&hba->pcidev->dev, sz, 592 mp_req->mp_resp_bd, 593 mp_req->mp_resp_bd_dma); 594 mp_req->mp_resp_bd = NULL; 595 } 596 if (mp_req->req_buf) { 597 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, 598 mp_req->req_buf, 599 mp_req->req_buf_dma); 600 mp_req->req_buf = NULL; 601 } 602 if (mp_req->resp_buf) { 603 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, 604 mp_req->resp_buf, 605 mp_req->resp_buf_dma); 606 mp_req->resp_buf = NULL; 607 } 608 } 609 610 int bnx2fc_init_mp_req(struct bnx2fc_cmd *io_req) 611 { 612 struct bnx2fc_mp_req *mp_req; 613 struct fcoe_bd_ctx *mp_req_bd; 614 struct fcoe_bd_ctx *mp_resp_bd; 615 struct bnx2fc_interface *interface = io_req->port->priv; 616 struct bnx2fc_hba *hba = interface->hba; 617 dma_addr_t addr; 618 size_t sz; 619 620 mp_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); 621 memset(mp_req, 0, sizeof(struct bnx2fc_mp_req)); 622 623 mp_req->req_len = sizeof(struct fcp_cmnd); 624 io_req->data_xfer_len = mp_req->req_len; 625 mp_req->req_buf = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, 626 &mp_req->req_buf_dma, 627 GFP_ATOMIC); 628 if (!mp_req->req_buf) { 629 printk(KERN_ERR PFX "unable to alloc MP req buffer\n"); 630 bnx2fc_free_mp_resc(io_req); 631 return FAILED; 632 } 633 634 mp_req->resp_buf = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, 635 &mp_req->resp_buf_dma, 636 GFP_ATOMIC); 637 if (!mp_req->resp_buf) { 638 printk(KERN_ERR PFX "unable to alloc TM resp buffer\n"); 639 bnx2fc_free_mp_resc(io_req); 640 return FAILED; 641 } 642 memset(mp_req->req_buf, 0, PAGE_SIZE); 643 memset(mp_req->resp_buf, 0, PAGE_SIZE); 644 645 /* Allocate and map mp_req_bd and mp_resp_bd */ 646 sz = sizeof(struct fcoe_bd_ctx); 647 mp_req->mp_req_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, 648 &mp_req->mp_req_bd_dma, 649 GFP_ATOMIC); 650 if (!mp_req->mp_req_bd) { 651 printk(KERN_ERR PFX "unable to alloc MP req bd\n"); 652 bnx2fc_free_mp_resc(io_req); 653 return FAILED; 654 } 655 mp_req->mp_resp_bd = dma_alloc_coherent(&hba->pcidev->dev, sz, 656 &mp_req->mp_resp_bd_dma, 657 GFP_ATOMIC); 658 if (!mp_req->mp_resp_bd) { 659 printk(KERN_ERR PFX "unable to alloc MP resp bd\n"); 660 bnx2fc_free_mp_resc(io_req); 661 return FAILED; 662 } 663 /* Fill bd table */ 664 addr = mp_req->req_buf_dma; 665 mp_req_bd = mp_req->mp_req_bd; 666 mp_req_bd->buf_addr_lo = (u32)addr & 0xffffffff; 667 mp_req_bd->buf_addr_hi = (u32)((u64)addr >> 32); 668 mp_req_bd->buf_len = PAGE_SIZE; 669 mp_req_bd->flags = 0; 670 671 /* 672 * MP buffer is either a task mgmt command or an ELS. 673 * So the assumption is that it consumes a single bd 674 * entry in the bd table 675 */ 676 mp_resp_bd = mp_req->mp_resp_bd; 677 addr = mp_req->resp_buf_dma; 678 mp_resp_bd->buf_addr_lo = (u32)addr & 0xffffffff; 679 mp_resp_bd->buf_addr_hi = (u32)((u64)addr >> 32); 680 mp_resp_bd->buf_len = PAGE_SIZE; 681 mp_resp_bd->flags = 0; 682 683 return SUCCESS; 684 } 685 686 static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags) 687 { 688 struct fc_lport *lport; 689 struct fc_rport *rport; 690 struct fc_rport_libfc_priv *rp; 691 struct fcoe_port *port; 692 struct bnx2fc_interface *interface; 693 struct bnx2fc_rport *tgt; 694 struct bnx2fc_cmd *io_req; 695 struct bnx2fc_mp_req *tm_req; 696 struct fcoe_task_ctx_entry *task; 697 struct fcoe_task_ctx_entry *task_page; 698 struct Scsi_Host *host = sc_cmd->device->host; 699 struct fc_frame_header *fc_hdr; 700 struct fcp_cmnd *fcp_cmnd; 701 int task_idx, index; 702 int rc = SUCCESS; 703 u16 xid; 704 u32 sid, did; 705 unsigned long start = jiffies; 706 707 lport = shost_priv(host); 708 rport = starget_to_rport(scsi_target(sc_cmd->device)); 709 port = lport_priv(lport); 710 interface = port->priv; 711 712 if (rport == NULL) { 713 printk(KERN_ERR PFX "device_reset: rport is NULL\n"); 714 rc = FAILED; 715 goto tmf_err; 716 } 717 rp = rport->dd_data; 718 719 rc = fc_block_scsi_eh(sc_cmd); 720 if (rc) 721 return rc; 722 723 if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 724 printk(KERN_ERR PFX "device_reset: link is not ready\n"); 725 rc = FAILED; 726 goto tmf_err; 727 } 728 /* rport and tgt are allocated together, so tgt should be non-NULL */ 729 tgt = (struct bnx2fc_rport *)&rp[1]; 730 731 if (!(test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) { 732 printk(KERN_ERR PFX "device_reset: tgt not offloaded\n"); 733 rc = FAILED; 734 goto tmf_err; 735 } 736 retry_tmf: 737 io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_TASK_MGMT_CMD); 738 if (!io_req) { 739 if (time_after(jiffies, start + HZ)) { 740 printk(KERN_ERR PFX "tmf: Failed TMF"); 741 rc = FAILED; 742 goto tmf_err; 743 } 744 msleep(20); 745 goto retry_tmf; 746 } 747 /* Initialize rest of io_req fields */ 748 io_req->sc_cmd = sc_cmd; 749 io_req->port = port; 750 io_req->tgt = tgt; 751 752 tm_req = (struct bnx2fc_mp_req *)&(io_req->mp_req); 753 754 rc = bnx2fc_init_mp_req(io_req); 755 if (rc == FAILED) { 756 printk(KERN_ERR PFX "Task mgmt MP request init failed\n"); 757 spin_lock_bh(&tgt->tgt_lock); 758 kref_put(&io_req->refcount, bnx2fc_cmd_release); 759 spin_unlock_bh(&tgt->tgt_lock); 760 goto tmf_err; 761 } 762 763 /* Set TM flags */ 764 io_req->io_req_flags = 0; 765 tm_req->tm_flags = tm_flags; 766 767 /* Fill FCP_CMND */ 768 bnx2fc_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tm_req->req_buf); 769 fcp_cmnd = (struct fcp_cmnd *)tm_req->req_buf; 770 memset(fcp_cmnd->fc_cdb, 0, sc_cmd->cmd_len); 771 fcp_cmnd->fc_dl = 0; 772 773 /* Fill FC header */ 774 fc_hdr = &(tm_req->req_fc_hdr); 775 sid = tgt->sid; 776 did = rport->port_id; 777 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, did, sid, 778 FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | 779 FC_FC_SEQ_INIT, 0); 780 /* Obtain exchange id */ 781 xid = io_req->xid; 782 783 BNX2FC_TGT_DBG(tgt, "Initiate TMF - xid = 0x%x\n", xid); 784 task_idx = xid/BNX2FC_TASKS_PER_PAGE; 785 index = xid % BNX2FC_TASKS_PER_PAGE; 786 787 /* Initialize task context for this IO request */ 788 task_page = (struct fcoe_task_ctx_entry *) 789 interface->hba->task_ctx[task_idx]; 790 task = &(task_page[index]); 791 bnx2fc_init_mp_task(io_req, task); 792 793 sc_cmd->SCp.ptr = (char *)io_req; 794 795 /* Obtain free SQ entry */ 796 spin_lock_bh(&tgt->tgt_lock); 797 bnx2fc_add_2_sq(tgt, xid); 798 799 /* Enqueue the io_req to active_tm_queue */ 800 io_req->on_tmf_queue = 1; 801 list_add_tail(&io_req->link, &tgt->active_tm_queue); 802 803 init_completion(&io_req->tm_done); 804 io_req->wait_for_comp = 1; 805 806 /* Ring doorbell */ 807 bnx2fc_ring_doorbell(tgt); 808 spin_unlock_bh(&tgt->tgt_lock); 809 810 rc = wait_for_completion_timeout(&io_req->tm_done, 811 BNX2FC_TM_TIMEOUT * HZ); 812 spin_lock_bh(&tgt->tgt_lock); 813 814 io_req->wait_for_comp = 0; 815 if (!(test_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags))) { 816 set_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags); 817 if (io_req->on_tmf_queue) { 818 list_del_init(&io_req->link); 819 io_req->on_tmf_queue = 0; 820 } 821 io_req->wait_for_comp = 1; 822 bnx2fc_initiate_cleanup(io_req); 823 spin_unlock_bh(&tgt->tgt_lock); 824 rc = wait_for_completion_timeout(&io_req->tm_done, 825 BNX2FC_FW_TIMEOUT); 826 spin_lock_bh(&tgt->tgt_lock); 827 io_req->wait_for_comp = 0; 828 if (!rc) 829 kref_put(&io_req->refcount, bnx2fc_cmd_release); 830 } 831 832 spin_unlock_bh(&tgt->tgt_lock); 833 834 if (!rc) { 835 BNX2FC_TGT_DBG(tgt, "task mgmt command failed...\n"); 836 rc = FAILED; 837 } else { 838 BNX2FC_TGT_DBG(tgt, "task mgmt command success...\n"); 839 rc = SUCCESS; 840 } 841 tmf_err: 842 return rc; 843 } 844 845 int bnx2fc_initiate_abts(struct bnx2fc_cmd *io_req) 846 { 847 struct fc_lport *lport; 848 struct bnx2fc_rport *tgt = io_req->tgt; 849 struct fc_rport *rport = tgt->rport; 850 struct fc_rport_priv *rdata = tgt->rdata; 851 struct bnx2fc_interface *interface; 852 struct fcoe_port *port; 853 struct bnx2fc_cmd *abts_io_req; 854 struct fcoe_task_ctx_entry *task; 855 struct fcoe_task_ctx_entry *task_page; 856 struct fc_frame_header *fc_hdr; 857 struct bnx2fc_mp_req *abts_req; 858 int task_idx, index; 859 u32 sid, did; 860 u16 xid; 861 int rc = SUCCESS; 862 u32 r_a_tov = rdata->r_a_tov; 863 864 /* called with tgt_lock held */ 865 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_abts\n"); 866 867 port = io_req->port; 868 interface = port->priv; 869 lport = port->lport; 870 871 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { 872 printk(KERN_ERR PFX "initiate_abts: tgt not offloaded\n"); 873 rc = FAILED; 874 goto abts_err; 875 } 876 877 if (rport == NULL) { 878 printk(KERN_ERR PFX "initiate_abts: rport is NULL\n"); 879 rc = FAILED; 880 goto abts_err; 881 } 882 883 if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 884 printk(KERN_ERR PFX "initiate_abts: link is not ready\n"); 885 rc = FAILED; 886 goto abts_err; 887 } 888 889 abts_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_ABTS); 890 if (!abts_io_req) { 891 printk(KERN_ERR PFX "abts: couldnt allocate cmd\n"); 892 rc = FAILED; 893 goto abts_err; 894 } 895 896 /* Initialize rest of io_req fields */ 897 abts_io_req->sc_cmd = NULL; 898 abts_io_req->port = port; 899 abts_io_req->tgt = tgt; 900 abts_io_req->data_xfer_len = 0; /* No data transfer for ABTS */ 901 902 abts_req = (struct bnx2fc_mp_req *)&(abts_io_req->mp_req); 903 memset(abts_req, 0, sizeof(struct bnx2fc_mp_req)); 904 905 /* Fill FC header */ 906 fc_hdr = &(abts_req->req_fc_hdr); 907 908 /* Obtain oxid and rxid for the original exchange to be aborted */ 909 fc_hdr->fh_ox_id = htons(io_req->xid); 910 fc_hdr->fh_rx_id = htons(io_req->task->rxwr_txrd.var_ctx.rx_id); 911 912 sid = tgt->sid; 913 did = rport->port_id; 914 915 __fc_fill_fc_hdr(fc_hdr, FC_RCTL_BA_ABTS, did, sid, 916 FC_TYPE_BLS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ | 917 FC_FC_SEQ_INIT, 0); 918 919 xid = abts_io_req->xid; 920 BNX2FC_IO_DBG(abts_io_req, "ABTS io_req\n"); 921 task_idx = xid/BNX2FC_TASKS_PER_PAGE; 922 index = xid % BNX2FC_TASKS_PER_PAGE; 923 924 /* Initialize task context for this IO request */ 925 task_page = (struct fcoe_task_ctx_entry *) 926 interface->hba->task_ctx[task_idx]; 927 task = &(task_page[index]); 928 bnx2fc_init_mp_task(abts_io_req, task); 929 930 /* 931 * ABTS task is a temporary task that will be cleaned up 932 * irrespective of ABTS response. We need to start the timer 933 * for the original exchange, as the CQE is posted for the original 934 * IO request. 935 * 936 * Timer for ABTS is started only when it is originated by a 937 * TM request. For the ABTS issued as part of ULP timeout, 938 * scsi-ml maintains the timers. 939 */ 940 941 /* if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags))*/ 942 bnx2fc_cmd_timer_set(io_req, 2 * r_a_tov); 943 944 /* Obtain free SQ entry */ 945 bnx2fc_add_2_sq(tgt, xid); 946 947 /* Ring doorbell */ 948 bnx2fc_ring_doorbell(tgt); 949 950 abts_err: 951 return rc; 952 } 953 954 int bnx2fc_initiate_seq_cleanup(struct bnx2fc_cmd *orig_io_req, u32 offset, 955 enum fc_rctl r_ctl) 956 { 957 struct fc_lport *lport; 958 struct bnx2fc_rport *tgt = orig_io_req->tgt; 959 struct bnx2fc_interface *interface; 960 struct fcoe_port *port; 961 struct bnx2fc_cmd *seq_clnp_req; 962 struct fcoe_task_ctx_entry *task; 963 struct fcoe_task_ctx_entry *task_page; 964 struct bnx2fc_els_cb_arg *cb_arg = NULL; 965 int task_idx, index; 966 u16 xid; 967 int rc = 0; 968 969 BNX2FC_IO_DBG(orig_io_req, "bnx2fc_initiate_seq_cleanup xid = 0x%x\n", 970 orig_io_req->xid); 971 kref_get(&orig_io_req->refcount); 972 973 port = orig_io_req->port; 974 interface = port->priv; 975 lport = port->lport; 976 977 cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC); 978 if (!cb_arg) { 979 printk(KERN_ERR PFX "Unable to alloc cb_arg for seq clnup\n"); 980 rc = -ENOMEM; 981 goto cleanup_err; 982 } 983 984 seq_clnp_req = bnx2fc_elstm_alloc(tgt, BNX2FC_SEQ_CLEANUP); 985 if (!seq_clnp_req) { 986 printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n"); 987 rc = -ENOMEM; 988 kfree(cb_arg); 989 goto cleanup_err; 990 } 991 /* Initialize rest of io_req fields */ 992 seq_clnp_req->sc_cmd = NULL; 993 seq_clnp_req->port = port; 994 seq_clnp_req->tgt = tgt; 995 seq_clnp_req->data_xfer_len = 0; /* No data transfer for cleanup */ 996 997 xid = seq_clnp_req->xid; 998 999 task_idx = xid/BNX2FC_TASKS_PER_PAGE; 1000 index = xid % BNX2FC_TASKS_PER_PAGE; 1001 1002 /* Initialize task context for this IO request */ 1003 task_page = (struct fcoe_task_ctx_entry *) 1004 interface->hba->task_ctx[task_idx]; 1005 task = &(task_page[index]); 1006 cb_arg->aborted_io_req = orig_io_req; 1007 cb_arg->io_req = seq_clnp_req; 1008 cb_arg->r_ctl = r_ctl; 1009 cb_arg->offset = offset; 1010 seq_clnp_req->cb_arg = cb_arg; 1011 1012 printk(KERN_ERR PFX "call init_seq_cleanup_task\n"); 1013 bnx2fc_init_seq_cleanup_task(seq_clnp_req, task, orig_io_req, offset); 1014 1015 /* Obtain free SQ entry */ 1016 bnx2fc_add_2_sq(tgt, xid); 1017 1018 /* Ring doorbell */ 1019 bnx2fc_ring_doorbell(tgt); 1020 cleanup_err: 1021 return rc; 1022 } 1023 1024 int bnx2fc_initiate_cleanup(struct bnx2fc_cmd *io_req) 1025 { 1026 struct fc_lport *lport; 1027 struct bnx2fc_rport *tgt = io_req->tgt; 1028 struct bnx2fc_interface *interface; 1029 struct fcoe_port *port; 1030 struct bnx2fc_cmd *cleanup_io_req; 1031 struct fcoe_task_ctx_entry *task; 1032 struct fcoe_task_ctx_entry *task_page; 1033 int task_idx, index; 1034 u16 xid, orig_xid; 1035 int rc = 0; 1036 1037 /* ASSUMPTION: called with tgt_lock held */ 1038 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_initiate_cleanup\n"); 1039 1040 port = io_req->port; 1041 interface = port->priv; 1042 lport = port->lport; 1043 1044 cleanup_io_req = bnx2fc_elstm_alloc(tgt, BNX2FC_CLEANUP); 1045 if (!cleanup_io_req) { 1046 printk(KERN_ERR PFX "cleanup: couldnt allocate cmd\n"); 1047 rc = -1; 1048 goto cleanup_err; 1049 } 1050 1051 /* Initialize rest of io_req fields */ 1052 cleanup_io_req->sc_cmd = NULL; 1053 cleanup_io_req->port = port; 1054 cleanup_io_req->tgt = tgt; 1055 cleanup_io_req->data_xfer_len = 0; /* No data transfer for cleanup */ 1056 1057 xid = cleanup_io_req->xid; 1058 1059 task_idx = xid/BNX2FC_TASKS_PER_PAGE; 1060 index = xid % BNX2FC_TASKS_PER_PAGE; 1061 1062 /* Initialize task context for this IO request */ 1063 task_page = (struct fcoe_task_ctx_entry *) 1064 interface->hba->task_ctx[task_idx]; 1065 task = &(task_page[index]); 1066 orig_xid = io_req->xid; 1067 1068 BNX2FC_IO_DBG(io_req, "CLEANUP io_req xid = 0x%x\n", xid); 1069 1070 bnx2fc_init_cleanup_task(cleanup_io_req, task, orig_xid); 1071 1072 /* Obtain free SQ entry */ 1073 bnx2fc_add_2_sq(tgt, xid); 1074 1075 /* Ring doorbell */ 1076 bnx2fc_ring_doorbell(tgt); 1077 1078 cleanup_err: 1079 return rc; 1080 } 1081 1082 /** 1083 * bnx2fc_eh_target_reset: Reset a target 1084 * 1085 * @sc_cmd: SCSI command 1086 * 1087 * Set from SCSI host template to send task mgmt command to the target 1088 * and wait for the response 1089 */ 1090 int bnx2fc_eh_target_reset(struct scsi_cmnd *sc_cmd) 1091 { 1092 return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET); 1093 } 1094 1095 /** 1096 * bnx2fc_eh_device_reset - Reset a single LUN 1097 * 1098 * @sc_cmd: SCSI command 1099 * 1100 * Set from SCSI host template to send task mgmt command to the target 1101 * and wait for the response 1102 */ 1103 int bnx2fc_eh_device_reset(struct scsi_cmnd *sc_cmd) 1104 { 1105 return bnx2fc_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET); 1106 } 1107 1108 int bnx2fc_expl_logo(struct fc_lport *lport, struct bnx2fc_cmd *io_req) 1109 { 1110 struct bnx2fc_rport *tgt = io_req->tgt; 1111 struct fc_rport_priv *rdata = tgt->rdata; 1112 int logo_issued; 1113 int rc = SUCCESS; 1114 int wait_cnt = 0; 1115 1116 BNX2FC_IO_DBG(io_req, "Expl logo - tgt flags = 0x%lx\n", 1117 tgt->flags); 1118 logo_issued = test_and_set_bit(BNX2FC_FLAG_EXPL_LOGO, 1119 &tgt->flags); 1120 io_req->wait_for_comp = 1; 1121 bnx2fc_initiate_cleanup(io_req); 1122 1123 spin_unlock_bh(&tgt->tgt_lock); 1124 1125 wait_for_completion(&io_req->tm_done); 1126 1127 io_req->wait_for_comp = 0; 1128 /* 1129 * release the reference taken in eh_abort to allow the 1130 * target to re-login after flushing IOs 1131 */ 1132 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1133 1134 if (!logo_issued) { 1135 clear_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags); 1136 mutex_lock(&lport->disc.disc_mutex); 1137 lport->tt.rport_logoff(rdata); 1138 mutex_unlock(&lport->disc.disc_mutex); 1139 do { 1140 msleep(BNX2FC_RELOGIN_WAIT_TIME); 1141 if (wait_cnt++ > BNX2FC_RELOGIN_WAIT_CNT) { 1142 rc = FAILED; 1143 break; 1144 } 1145 } while (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)); 1146 } 1147 spin_lock_bh(&tgt->tgt_lock); 1148 return rc; 1149 } 1150 /** 1151 * bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding 1152 * SCSI command 1153 * 1154 * @sc_cmd: SCSI_ML command pointer 1155 * 1156 * SCSI abort request handler 1157 */ 1158 int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd) 1159 { 1160 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 1161 struct fc_rport_libfc_priv *rp = rport->dd_data; 1162 struct bnx2fc_cmd *io_req; 1163 struct fc_lport *lport; 1164 struct bnx2fc_rport *tgt; 1165 int rc = FAILED; 1166 1167 1168 rc = fc_block_scsi_eh(sc_cmd); 1169 if (rc) 1170 return rc; 1171 1172 lport = shost_priv(sc_cmd->device->host); 1173 if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { 1174 printk(KERN_ERR PFX "eh_abort: link not ready\n"); 1175 return rc; 1176 } 1177 1178 tgt = (struct bnx2fc_rport *)&rp[1]; 1179 1180 BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n"); 1181 1182 spin_lock_bh(&tgt->tgt_lock); 1183 io_req = (struct bnx2fc_cmd *)sc_cmd->SCp.ptr; 1184 if (!io_req) { 1185 /* Command might have just completed */ 1186 printk(KERN_ERR PFX "eh_abort: io_req is NULL\n"); 1187 spin_unlock_bh(&tgt->tgt_lock); 1188 return SUCCESS; 1189 } 1190 BNX2FC_IO_DBG(io_req, "eh_abort - refcnt = %d\n", 1191 io_req->refcount.refcount.counter); 1192 1193 /* Hold IO request across abort processing */ 1194 kref_get(&io_req->refcount); 1195 1196 BUG_ON(tgt != io_req->tgt); 1197 1198 /* Remove the io_req from the active_q. */ 1199 /* 1200 * Task Mgmt functions (LUN RESET & TGT RESET) will not 1201 * issue an ABTS on this particular IO req, as the 1202 * io_req is no longer in the active_q. 1203 */ 1204 if (tgt->flush_in_prog) { 1205 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1206 "flush in progress\n", io_req->xid); 1207 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1208 spin_unlock_bh(&tgt->tgt_lock); 1209 return SUCCESS; 1210 } 1211 1212 if (io_req->on_active_queue == 0) { 1213 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1214 "not on active_q\n", io_req->xid); 1215 /* 1216 * This condition can happen only due to the FW bug, 1217 * where we do not receive cleanup response from 1218 * the FW. Handle this case gracefully by erroring 1219 * back the IO request to SCSI-ml 1220 */ 1221 bnx2fc_scsi_done(io_req, DID_ABORT); 1222 1223 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1224 spin_unlock_bh(&tgt->tgt_lock); 1225 return SUCCESS; 1226 } 1227 1228 /* 1229 * Only eh_abort processing will remove the IO from 1230 * active_cmd_q before processing the request. this is 1231 * done to avoid race conditions between IOs aborted 1232 * as part of task management completion and eh_abort 1233 * processing 1234 */ 1235 list_del_init(&io_req->link); 1236 io_req->on_active_queue = 0; 1237 /* Move IO req to retire queue */ 1238 list_add_tail(&io_req->link, &tgt->io_retire_queue); 1239 1240 init_completion(&io_req->tm_done); 1241 1242 if (test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) { 1243 printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) " 1244 "already in abts processing\n", io_req->xid); 1245 if (cancel_delayed_work(&io_req->timeout_work)) 1246 kref_put(&io_req->refcount, 1247 bnx2fc_cmd_release); /* drop timer hold */ 1248 rc = bnx2fc_expl_logo(lport, io_req); 1249 /* This only occurs when an task abort was requested while ABTS 1250 is in progress. Setting the IO_CLEANUP flag will skip the 1251 RRQ process in the case when the fw generated SCSI_CMD cmpl 1252 was a result from the ABTS request rather than the CLEANUP 1253 request */ 1254 set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags); 1255 goto out; 1256 } 1257 1258 /* Cancel the current timer running on this io_req */ 1259 if (cancel_delayed_work(&io_req->timeout_work)) 1260 kref_put(&io_req->refcount, 1261 bnx2fc_cmd_release); /* drop timer hold */ 1262 set_bit(BNX2FC_FLAG_EH_ABORT, &io_req->req_flags); 1263 io_req->wait_for_comp = 1; 1264 rc = bnx2fc_initiate_abts(io_req); 1265 if (rc == FAILED) { 1266 bnx2fc_initiate_cleanup(io_req); 1267 spin_unlock_bh(&tgt->tgt_lock); 1268 wait_for_completion(&io_req->tm_done); 1269 spin_lock_bh(&tgt->tgt_lock); 1270 io_req->wait_for_comp = 0; 1271 goto done; 1272 } 1273 spin_unlock_bh(&tgt->tgt_lock); 1274 1275 wait_for_completion(&io_req->tm_done); 1276 1277 spin_lock_bh(&tgt->tgt_lock); 1278 io_req->wait_for_comp = 0; 1279 if (test_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) { 1280 BNX2FC_IO_DBG(io_req, "IO completed in a different context\n"); 1281 rc = SUCCESS; 1282 } else if (!(test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 1283 &io_req->req_flags))) { 1284 /* Let the scsi-ml try to recover this command */ 1285 printk(KERN_ERR PFX "abort failed, xid = 0x%x\n", 1286 io_req->xid); 1287 rc = bnx2fc_expl_logo(lport, io_req); 1288 goto out; 1289 } else { 1290 /* 1291 * We come here even when there was a race condition 1292 * between timeout and abts completion, and abts 1293 * completion happens just in time. 1294 */ 1295 BNX2FC_IO_DBG(io_req, "abort succeeded\n"); 1296 rc = SUCCESS; 1297 bnx2fc_scsi_done(io_req, DID_ABORT); 1298 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1299 } 1300 done: 1301 /* release the reference taken in eh_abort */ 1302 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1303 out: 1304 spin_unlock_bh(&tgt->tgt_lock); 1305 return rc; 1306 } 1307 1308 void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnp_req, 1309 struct fcoe_task_ctx_entry *task, 1310 u8 rx_state) 1311 { 1312 struct bnx2fc_els_cb_arg *cb_arg = seq_clnp_req->cb_arg; 1313 struct bnx2fc_cmd *orig_io_req = cb_arg->aborted_io_req; 1314 u32 offset = cb_arg->offset; 1315 enum fc_rctl r_ctl = cb_arg->r_ctl; 1316 int rc = 0; 1317 struct bnx2fc_rport *tgt = orig_io_req->tgt; 1318 1319 BNX2FC_IO_DBG(orig_io_req, "Entered process_cleanup_compl xid = 0x%x" 1320 "cmd_type = %d\n", 1321 seq_clnp_req->xid, seq_clnp_req->cmd_type); 1322 1323 if (rx_state == FCOE_TASK_RX_STATE_IGNORED_SEQUENCE_CLEANUP) { 1324 printk(KERN_ERR PFX "seq cleanup ignored - xid = 0x%x\n", 1325 seq_clnp_req->xid); 1326 goto free_cb_arg; 1327 } 1328 1329 spin_unlock_bh(&tgt->tgt_lock); 1330 rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl); 1331 spin_lock_bh(&tgt->tgt_lock); 1332 1333 if (rc) 1334 printk(KERN_ERR PFX "clnup_compl: Unable to send SRR" 1335 " IO will abort\n"); 1336 seq_clnp_req->cb_arg = NULL; 1337 kref_put(&orig_io_req->refcount, bnx2fc_cmd_release); 1338 free_cb_arg: 1339 kfree(cb_arg); 1340 return; 1341 } 1342 1343 void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req, 1344 struct fcoe_task_ctx_entry *task, 1345 u8 num_rq) 1346 { 1347 BNX2FC_IO_DBG(io_req, "Entered process_cleanup_compl " 1348 "refcnt = %d, cmd_type = %d\n", 1349 io_req->refcount.refcount.counter, io_req->cmd_type); 1350 bnx2fc_scsi_done(io_req, DID_ERROR); 1351 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1352 if (io_req->wait_for_comp) 1353 complete(&io_req->tm_done); 1354 } 1355 1356 void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req, 1357 struct fcoe_task_ctx_entry *task, 1358 u8 num_rq) 1359 { 1360 u32 r_ctl; 1361 u32 r_a_tov = FC_DEF_R_A_TOV; 1362 u8 issue_rrq = 0; 1363 struct bnx2fc_rport *tgt = io_req->tgt; 1364 1365 BNX2FC_IO_DBG(io_req, "Entered process_abts_compl xid = 0x%x" 1366 "refcnt = %d, cmd_type = %d\n", 1367 io_req->xid, 1368 io_req->refcount.refcount.counter, io_req->cmd_type); 1369 1370 if (test_and_set_bit(BNX2FC_FLAG_ABTS_DONE, 1371 &io_req->req_flags)) { 1372 BNX2FC_IO_DBG(io_req, "Timer context finished processing" 1373 " this io\n"); 1374 return; 1375 } 1376 1377 /* Do not issue RRQ as this IO is already cleanedup */ 1378 if (test_and_set_bit(BNX2FC_FLAG_IO_CLEANUP, 1379 &io_req->req_flags)) 1380 goto io_compl; 1381 1382 /* 1383 * For ABTS issued due to SCSI eh_abort_handler, timeout 1384 * values are maintained by scsi-ml itself. Cancel timeout 1385 * in case ABTS issued as part of task management function 1386 * or due to FW error. 1387 */ 1388 if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) 1389 if (cancel_delayed_work(&io_req->timeout_work)) 1390 kref_put(&io_req->refcount, 1391 bnx2fc_cmd_release); /* drop timer hold */ 1392 1393 r_ctl = (u8)task->rxwr_only.union_ctx.comp_info.abts_rsp.r_ctl; 1394 1395 switch (r_ctl) { 1396 case FC_RCTL_BA_ACC: 1397 /* 1398 * Dont release this cmd yet. It will be relesed 1399 * after we get RRQ response 1400 */ 1401 BNX2FC_IO_DBG(io_req, "ABTS response - ACC Send RRQ\n"); 1402 issue_rrq = 1; 1403 break; 1404 1405 case FC_RCTL_BA_RJT: 1406 BNX2FC_IO_DBG(io_req, "ABTS response - RJT\n"); 1407 break; 1408 default: 1409 printk(KERN_ERR PFX "Unknown ABTS response\n"); 1410 break; 1411 } 1412 1413 if (issue_rrq) { 1414 BNX2FC_IO_DBG(io_req, "Issue RRQ after R_A_TOV\n"); 1415 set_bit(BNX2FC_FLAG_ISSUE_RRQ, &io_req->req_flags); 1416 } 1417 set_bit(BNX2FC_FLAG_RETIRE_OXID, &io_req->req_flags); 1418 bnx2fc_cmd_timer_set(io_req, r_a_tov); 1419 1420 io_compl: 1421 if (io_req->wait_for_comp) { 1422 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, 1423 &io_req->req_flags)) 1424 complete(&io_req->tm_done); 1425 } else { 1426 /* 1427 * We end up here when ABTS is issued as 1428 * in asynchronous context, i.e., as part 1429 * of task management completion, or 1430 * when FW error is received or when the 1431 * ABTS is issued when the IO is timed 1432 * out. 1433 */ 1434 1435 if (io_req->on_active_queue) { 1436 list_del_init(&io_req->link); 1437 io_req->on_active_queue = 0; 1438 /* Move IO req to retire queue */ 1439 list_add_tail(&io_req->link, &tgt->io_retire_queue); 1440 } 1441 bnx2fc_scsi_done(io_req, DID_ERROR); 1442 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1443 } 1444 } 1445 1446 static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req) 1447 { 1448 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1449 struct bnx2fc_rport *tgt = io_req->tgt; 1450 struct bnx2fc_cmd *cmd, *tmp; 1451 int tm_lun = sc_cmd->device->lun; 1452 int rc = 0; 1453 int lun; 1454 1455 /* called with tgt_lock held */ 1456 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_lun_reset_cmpl\n"); 1457 /* 1458 * Walk thru the active_ios queue and ABORT the IO 1459 * that matches with the LUN that was reset 1460 */ 1461 list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) { 1462 BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n"); 1463 lun = cmd->sc_cmd->device->lun; 1464 if (lun == tm_lun) { 1465 /* Initiate ABTS on this cmd */ 1466 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, 1467 &cmd->req_flags)) { 1468 /* cancel the IO timeout */ 1469 if (cancel_delayed_work(&io_req->timeout_work)) 1470 kref_put(&io_req->refcount, 1471 bnx2fc_cmd_release); 1472 /* timer hold */ 1473 rc = bnx2fc_initiate_abts(cmd); 1474 /* abts shouldn't fail in this context */ 1475 WARN_ON(rc != SUCCESS); 1476 } else 1477 printk(KERN_ERR PFX "lun_rst: abts already in" 1478 " progress for this IO 0x%x\n", 1479 cmd->xid); 1480 } 1481 } 1482 } 1483 1484 static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req) 1485 { 1486 struct bnx2fc_rport *tgt = io_req->tgt; 1487 struct bnx2fc_cmd *cmd, *tmp; 1488 int rc = 0; 1489 1490 /* called with tgt_lock held */ 1491 BNX2FC_IO_DBG(io_req, "Entered bnx2fc_tgt_reset_cmpl\n"); 1492 /* 1493 * Walk thru the active_ios queue and ABORT the IO 1494 * that matches with the LUN that was reset 1495 */ 1496 list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) { 1497 BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n"); 1498 /* Initiate ABTS */ 1499 if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS, 1500 &cmd->req_flags)) { 1501 /* cancel the IO timeout */ 1502 if (cancel_delayed_work(&io_req->timeout_work)) 1503 kref_put(&io_req->refcount, 1504 bnx2fc_cmd_release); /* timer hold */ 1505 rc = bnx2fc_initiate_abts(cmd); 1506 /* abts shouldn't fail in this context */ 1507 WARN_ON(rc != SUCCESS); 1508 1509 } else 1510 printk(KERN_ERR PFX "tgt_rst: abts already in progress" 1511 " for this IO 0x%x\n", cmd->xid); 1512 } 1513 } 1514 1515 void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req, 1516 struct fcoe_task_ctx_entry *task, u8 num_rq) 1517 { 1518 struct bnx2fc_mp_req *tm_req; 1519 struct fc_frame_header *fc_hdr; 1520 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1521 u64 *hdr; 1522 u64 *temp_hdr; 1523 void *rsp_buf; 1524 1525 /* Called with tgt_lock held */ 1526 BNX2FC_IO_DBG(io_req, "Entered process_tm_compl\n"); 1527 1528 if (!(test_bit(BNX2FC_FLAG_TM_TIMEOUT, &io_req->req_flags))) 1529 set_bit(BNX2FC_FLAG_TM_COMPL, &io_req->req_flags); 1530 else { 1531 /* TM has already timed out and we got 1532 * delayed completion. Ignore completion 1533 * processing. 1534 */ 1535 return; 1536 } 1537 1538 tm_req = &(io_req->mp_req); 1539 fc_hdr = &(tm_req->resp_fc_hdr); 1540 hdr = (u64 *)fc_hdr; 1541 temp_hdr = (u64 *) 1542 &task->rxwr_only.union_ctx.comp_info.mp_rsp.fc_hdr; 1543 hdr[0] = cpu_to_be64(temp_hdr[0]); 1544 hdr[1] = cpu_to_be64(temp_hdr[1]); 1545 hdr[2] = cpu_to_be64(temp_hdr[2]); 1546 1547 tm_req->resp_len = 1548 task->rxwr_only.union_ctx.comp_info.mp_rsp.mp_payload_len; 1549 1550 rsp_buf = tm_req->resp_buf; 1551 1552 if (fc_hdr->fh_r_ctl == FC_RCTL_DD_CMD_STATUS) { 1553 bnx2fc_parse_fcp_rsp(io_req, 1554 (struct fcoe_fcp_rsp_payload *) 1555 rsp_buf, num_rq); 1556 if (io_req->fcp_rsp_code == 0) { 1557 /* TM successful */ 1558 if (tm_req->tm_flags & FCP_TMF_LUN_RESET) 1559 bnx2fc_lun_reset_cmpl(io_req); 1560 else if (tm_req->tm_flags & FCP_TMF_TGT_RESET) 1561 bnx2fc_tgt_reset_cmpl(io_req); 1562 } 1563 } else { 1564 printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n", 1565 fc_hdr->fh_r_ctl); 1566 } 1567 if (!sc_cmd->SCp.ptr) { 1568 printk(KERN_ERR PFX "tm_compl: SCp.ptr is NULL\n"); 1569 return; 1570 } 1571 switch (io_req->fcp_status) { 1572 case FC_GOOD: 1573 if (io_req->cdb_status == 0) { 1574 /* Good IO completion */ 1575 sc_cmd->result = DID_OK << 16; 1576 } else { 1577 /* Transport status is good, SCSI status not good */ 1578 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1579 } 1580 if (io_req->fcp_resid) 1581 scsi_set_resid(sc_cmd, io_req->fcp_resid); 1582 break; 1583 1584 default: 1585 BNX2FC_IO_DBG(io_req, "process_tm_compl: fcp_status = %d\n", 1586 io_req->fcp_status); 1587 break; 1588 } 1589 1590 sc_cmd = io_req->sc_cmd; 1591 io_req->sc_cmd = NULL; 1592 1593 /* check if the io_req exists in tgt's tmf_q */ 1594 if (io_req->on_tmf_queue) { 1595 1596 list_del_init(&io_req->link); 1597 io_req->on_tmf_queue = 0; 1598 } else { 1599 1600 printk(KERN_ERR PFX "Command not on active_cmd_queue!\n"); 1601 return; 1602 } 1603 1604 sc_cmd->SCp.ptr = NULL; 1605 sc_cmd->scsi_done(sc_cmd); 1606 1607 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1608 if (io_req->wait_for_comp) { 1609 BNX2FC_IO_DBG(io_req, "tm_compl - wake up the waiter\n"); 1610 complete(&io_req->tm_done); 1611 } 1612 } 1613 1614 static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, 1615 int bd_index) 1616 { 1617 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1618 int frag_size, sg_frags; 1619 1620 sg_frags = 0; 1621 while (sg_len) { 1622 if (sg_len >= BNX2FC_BD_SPLIT_SZ) 1623 frag_size = BNX2FC_BD_SPLIT_SZ; 1624 else 1625 frag_size = sg_len; 1626 bd[bd_index + sg_frags].buf_addr_lo = addr & 0xffffffff; 1627 bd[bd_index + sg_frags].buf_addr_hi = addr >> 32; 1628 bd[bd_index + sg_frags].buf_len = (u16)frag_size; 1629 bd[bd_index + sg_frags].flags = 0; 1630 1631 addr += (u64) frag_size; 1632 sg_frags++; 1633 sg_len -= frag_size; 1634 } 1635 return sg_frags; 1636 1637 } 1638 1639 static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req) 1640 { 1641 struct bnx2fc_interface *interface = io_req->port->priv; 1642 struct bnx2fc_hba *hba = interface->hba; 1643 struct scsi_cmnd *sc = io_req->sc_cmd; 1644 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1645 struct scatterlist *sg; 1646 int byte_count = 0; 1647 int sg_count = 0; 1648 int bd_count = 0; 1649 int sg_frags; 1650 unsigned int sg_len; 1651 u64 addr; 1652 int i; 1653 1654 sg_count = dma_map_sg(&hba->pcidev->dev, scsi_sglist(sc), 1655 scsi_sg_count(sc), sc->sc_data_direction); 1656 scsi_for_each_sg(sc, sg, sg_count, i) { 1657 sg_len = sg_dma_len(sg); 1658 addr = sg_dma_address(sg); 1659 if (sg_len > BNX2FC_MAX_BD_LEN) { 1660 sg_frags = bnx2fc_split_bd(io_req, addr, sg_len, 1661 bd_count); 1662 } else { 1663 1664 sg_frags = 1; 1665 bd[bd_count].buf_addr_lo = addr & 0xffffffff; 1666 bd[bd_count].buf_addr_hi = addr >> 32; 1667 bd[bd_count].buf_len = (u16)sg_len; 1668 bd[bd_count].flags = 0; 1669 } 1670 bd_count += sg_frags; 1671 byte_count += sg_len; 1672 } 1673 if (byte_count != scsi_bufflen(sc)) 1674 printk(KERN_ERR PFX "byte_count = %d != scsi_bufflen = %d, " 1675 "task_id = 0x%x\n", byte_count, scsi_bufflen(sc), 1676 io_req->xid); 1677 return bd_count; 1678 } 1679 1680 static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req) 1681 { 1682 struct scsi_cmnd *sc = io_req->sc_cmd; 1683 struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; 1684 int bd_count; 1685 1686 if (scsi_sg_count(sc)) { 1687 bd_count = bnx2fc_map_sg(io_req); 1688 if (bd_count == 0) 1689 return -ENOMEM; 1690 } else { 1691 bd_count = 0; 1692 bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0; 1693 bd[0].buf_len = bd[0].flags = 0; 1694 } 1695 io_req->bd_tbl->bd_valid = bd_count; 1696 1697 return 0; 1698 } 1699 1700 static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req) 1701 { 1702 struct scsi_cmnd *sc = io_req->sc_cmd; 1703 1704 if (io_req->bd_tbl->bd_valid && sc) { 1705 scsi_dma_unmap(sc); 1706 io_req->bd_tbl->bd_valid = 0; 1707 } 1708 } 1709 1710 void bnx2fc_build_fcp_cmnd(struct bnx2fc_cmd *io_req, 1711 struct fcp_cmnd *fcp_cmnd) 1712 { 1713 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1714 char tag[2]; 1715 1716 memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd)); 1717 1718 int_to_scsilun(sc_cmd->device->lun, &fcp_cmnd->fc_lun); 1719 1720 fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len); 1721 memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len); 1722 1723 fcp_cmnd->fc_cmdref = 0; 1724 fcp_cmnd->fc_pri_ta = 0; 1725 fcp_cmnd->fc_tm_flags = io_req->mp_req.tm_flags; 1726 fcp_cmnd->fc_flags = io_req->io_req_flags; 1727 1728 if (scsi_populate_tag_msg(sc_cmd, tag)) { 1729 switch (tag[0]) { 1730 case HEAD_OF_QUEUE_TAG: 1731 fcp_cmnd->fc_pri_ta = FCP_PTA_HEADQ; 1732 break; 1733 case ORDERED_QUEUE_TAG: 1734 fcp_cmnd->fc_pri_ta = FCP_PTA_ORDERED; 1735 break; 1736 default: 1737 fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE; 1738 break; 1739 } 1740 } else { 1741 fcp_cmnd->fc_pri_ta = 0; 1742 } 1743 } 1744 1745 static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, 1746 struct fcoe_fcp_rsp_payload *fcp_rsp, 1747 u8 num_rq) 1748 { 1749 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1750 struct bnx2fc_rport *tgt = io_req->tgt; 1751 u8 rsp_flags = fcp_rsp->fcp_flags.flags; 1752 u32 rq_buff_len = 0; 1753 int i; 1754 unsigned char *rq_data; 1755 unsigned char *dummy; 1756 int fcp_sns_len = 0; 1757 int fcp_rsp_len = 0; 1758 1759 io_req->fcp_status = FC_GOOD; 1760 io_req->fcp_resid = fcp_rsp->fcp_resid; 1761 1762 io_req->scsi_comp_flags = rsp_flags; 1763 CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status = 1764 fcp_rsp->scsi_status_code; 1765 1766 /* Fetch fcp_rsp_info and fcp_sns_info if available */ 1767 if (num_rq) { 1768 1769 /* 1770 * We do not anticipate num_rq >1, as the linux defined 1771 * SCSI_SENSE_BUFFERSIZE is 96 bytes + 8 bytes of FCP_RSP_INFO 1772 * 256 bytes of single rq buffer is good enough to hold this. 1773 */ 1774 1775 if (rsp_flags & 1776 FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) { 1777 fcp_rsp_len = rq_buff_len 1778 = fcp_rsp->fcp_rsp_len; 1779 } 1780 1781 if (rsp_flags & 1782 FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) { 1783 fcp_sns_len = fcp_rsp->fcp_sns_len; 1784 rq_buff_len += fcp_rsp->fcp_sns_len; 1785 } 1786 1787 io_req->fcp_rsp_len = fcp_rsp_len; 1788 io_req->fcp_sns_len = fcp_sns_len; 1789 1790 if (rq_buff_len > num_rq * BNX2FC_RQ_BUF_SZ) { 1791 /* Invalid sense sense length. */ 1792 printk(KERN_ERR PFX "invalid sns length %d\n", 1793 rq_buff_len); 1794 /* reset rq_buff_len */ 1795 rq_buff_len = num_rq * BNX2FC_RQ_BUF_SZ; 1796 } 1797 1798 rq_data = bnx2fc_get_next_rqe(tgt, 1); 1799 1800 if (num_rq > 1) { 1801 /* We do not need extra sense data */ 1802 for (i = 1; i < num_rq; i++) 1803 dummy = bnx2fc_get_next_rqe(tgt, 1); 1804 } 1805 1806 /* fetch fcp_rsp_code */ 1807 if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) { 1808 /* Only for task management function */ 1809 io_req->fcp_rsp_code = rq_data[3]; 1810 printk(KERN_ERR PFX "fcp_rsp_code = %d\n", 1811 io_req->fcp_rsp_code); 1812 } 1813 1814 /* fetch sense data */ 1815 rq_data += fcp_rsp_len; 1816 1817 if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) { 1818 printk(KERN_ERR PFX "Truncating sense buffer\n"); 1819 fcp_sns_len = SCSI_SENSE_BUFFERSIZE; 1820 } 1821 1822 memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1823 if (fcp_sns_len) 1824 memcpy(sc_cmd->sense_buffer, rq_data, fcp_sns_len); 1825 1826 /* return RQ entries */ 1827 for (i = 0; i < num_rq; i++) 1828 bnx2fc_return_rqe(tgt, 1); 1829 } 1830 } 1831 1832 /** 1833 * bnx2fc_queuecommand - Queuecommand function of the scsi template 1834 * 1835 * @host: The Scsi_Host the command was issued to 1836 * @sc_cmd: struct scsi_cmnd to be executed 1837 * 1838 * This is the IO strategy routine, called by SCSI-ML 1839 **/ 1840 int bnx2fc_queuecommand(struct Scsi_Host *host, 1841 struct scsi_cmnd *sc_cmd) 1842 { 1843 struct fc_lport *lport = shost_priv(host); 1844 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 1845 struct fc_rport_libfc_priv *rp = rport->dd_data; 1846 struct bnx2fc_rport *tgt; 1847 struct bnx2fc_cmd *io_req; 1848 int rc = 0; 1849 int rval; 1850 1851 rval = fc_remote_port_chkready(rport); 1852 if (rval) { 1853 sc_cmd->result = rval; 1854 sc_cmd->scsi_done(sc_cmd); 1855 return 0; 1856 } 1857 1858 if ((lport->state != LPORT_ST_READY) || !(lport->link_up)) { 1859 rc = SCSI_MLQUEUE_HOST_BUSY; 1860 goto exit_qcmd; 1861 } 1862 1863 /* rport and tgt are allocated together, so tgt should be non-NULL */ 1864 tgt = (struct bnx2fc_rport *)&rp[1]; 1865 1866 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { 1867 /* 1868 * Session is not offloaded yet. Let SCSI-ml retry 1869 * the command. 1870 */ 1871 rc = SCSI_MLQUEUE_TARGET_BUSY; 1872 goto exit_qcmd; 1873 } 1874 1875 io_req = bnx2fc_cmd_alloc(tgt); 1876 if (!io_req) { 1877 rc = SCSI_MLQUEUE_HOST_BUSY; 1878 goto exit_qcmd; 1879 } 1880 io_req->sc_cmd = sc_cmd; 1881 1882 if (bnx2fc_post_io_req(tgt, io_req)) { 1883 printk(KERN_ERR PFX "Unable to post io_req\n"); 1884 rc = SCSI_MLQUEUE_HOST_BUSY; 1885 goto exit_qcmd; 1886 } 1887 exit_qcmd: 1888 return rc; 1889 } 1890 1891 void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req, 1892 struct fcoe_task_ctx_entry *task, 1893 u8 num_rq) 1894 { 1895 struct fcoe_fcp_rsp_payload *fcp_rsp; 1896 struct bnx2fc_rport *tgt = io_req->tgt; 1897 struct scsi_cmnd *sc_cmd; 1898 struct Scsi_Host *host; 1899 1900 1901 /* scsi_cmd_cmpl is called with tgt lock held */ 1902 1903 if (test_and_set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags)) { 1904 /* we will not receive ABTS response for this IO */ 1905 BNX2FC_IO_DBG(io_req, "Timer context finished processing " 1906 "this scsi cmd\n"); 1907 } 1908 1909 /* Cancel the timeout_work, as we received IO completion */ 1910 if (cancel_delayed_work(&io_req->timeout_work)) 1911 kref_put(&io_req->refcount, 1912 bnx2fc_cmd_release); /* drop timer hold */ 1913 1914 sc_cmd = io_req->sc_cmd; 1915 if (sc_cmd == NULL) { 1916 printk(KERN_ERR PFX "scsi_cmd_compl - sc_cmd is NULL\n"); 1917 return; 1918 } 1919 1920 /* Fetch fcp_rsp from task context and perform cmd completion */ 1921 fcp_rsp = (struct fcoe_fcp_rsp_payload *) 1922 &(task->rxwr_only.union_ctx.comp_info.fcp_rsp.payload); 1923 1924 /* parse fcp_rsp and obtain sense data from RQ if available */ 1925 bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq); 1926 1927 host = sc_cmd->device->host; 1928 if (!sc_cmd->SCp.ptr) { 1929 printk(KERN_ERR PFX "SCp.ptr is NULL\n"); 1930 return; 1931 } 1932 1933 if (io_req->on_active_queue) { 1934 list_del_init(&io_req->link); 1935 io_req->on_active_queue = 0; 1936 /* Move IO req to retire queue */ 1937 list_add_tail(&io_req->link, &tgt->io_retire_queue); 1938 } else { 1939 /* This should not happen, but could have been pulled 1940 * by bnx2fc_flush_active_ios(), or during a race 1941 * between command abort and (late) completion. 1942 */ 1943 BNX2FC_IO_DBG(io_req, "xid not on active_cmd_queue\n"); 1944 if (io_req->wait_for_comp) 1945 if (test_and_clear_bit(BNX2FC_FLAG_EH_ABORT, 1946 &io_req->req_flags)) 1947 complete(&io_req->tm_done); 1948 } 1949 1950 bnx2fc_unmap_sg_list(io_req); 1951 io_req->sc_cmd = NULL; 1952 1953 switch (io_req->fcp_status) { 1954 case FC_GOOD: 1955 if (io_req->cdb_status == 0) { 1956 /* Good IO completion */ 1957 sc_cmd->result = DID_OK << 16; 1958 } else { 1959 /* Transport status is good, SCSI status not good */ 1960 BNX2FC_IO_DBG(io_req, "scsi_cmpl: cdb_status = %d" 1961 " fcp_resid = 0x%x\n", 1962 io_req->cdb_status, io_req->fcp_resid); 1963 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1964 } 1965 if (io_req->fcp_resid) 1966 scsi_set_resid(sc_cmd, io_req->fcp_resid); 1967 break; 1968 default: 1969 printk(KERN_ERR PFX "scsi_cmd_compl: fcp_status = %d\n", 1970 io_req->fcp_status); 1971 break; 1972 } 1973 sc_cmd->SCp.ptr = NULL; 1974 sc_cmd->scsi_done(sc_cmd); 1975 kref_put(&io_req->refcount, bnx2fc_cmd_release); 1976 } 1977 1978 int bnx2fc_post_io_req(struct bnx2fc_rport *tgt, 1979 struct bnx2fc_cmd *io_req) 1980 { 1981 struct fcoe_task_ctx_entry *task; 1982 struct fcoe_task_ctx_entry *task_page; 1983 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1984 struct fcoe_port *port = tgt->port; 1985 struct bnx2fc_interface *interface = port->priv; 1986 struct bnx2fc_hba *hba = interface->hba; 1987 struct fc_lport *lport = port->lport; 1988 struct fc_stats *stats; 1989 int task_idx, index; 1990 u16 xid; 1991 1992 /* Initialize rest of io_req fields */ 1993 io_req->cmd_type = BNX2FC_SCSI_CMD; 1994 io_req->port = port; 1995 io_req->tgt = tgt; 1996 io_req->data_xfer_len = scsi_bufflen(sc_cmd); 1997 sc_cmd->SCp.ptr = (char *)io_req; 1998 1999 stats = per_cpu_ptr(lport->stats, get_cpu()); 2000 if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) { 2001 io_req->io_req_flags = BNX2FC_READ; 2002 stats->InputRequests++; 2003 stats->InputBytes += io_req->data_xfer_len; 2004 } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { 2005 io_req->io_req_flags = BNX2FC_WRITE; 2006 stats->OutputRequests++; 2007 stats->OutputBytes += io_req->data_xfer_len; 2008 } else { 2009 io_req->io_req_flags = 0; 2010 stats->ControlRequests++; 2011 } 2012 put_cpu(); 2013 2014 xid = io_req->xid; 2015 2016 /* Build buffer descriptor list for firmware from sg list */ 2017 if (bnx2fc_build_bd_list_from_sg(io_req)) { 2018 printk(KERN_ERR PFX "BD list creation failed\n"); 2019 spin_lock_bh(&tgt->tgt_lock); 2020 kref_put(&io_req->refcount, bnx2fc_cmd_release); 2021 spin_unlock_bh(&tgt->tgt_lock); 2022 return -EAGAIN; 2023 } 2024 2025 task_idx = xid / BNX2FC_TASKS_PER_PAGE; 2026 index = xid % BNX2FC_TASKS_PER_PAGE; 2027 2028 /* Initialize task context for this IO request */ 2029 task_page = (struct fcoe_task_ctx_entry *) hba->task_ctx[task_idx]; 2030 task = &(task_page[index]); 2031 bnx2fc_init_task(io_req, task); 2032 2033 spin_lock_bh(&tgt->tgt_lock); 2034 2035 if (tgt->flush_in_prog) { 2036 printk(KERN_ERR PFX "Flush in progress..Host Busy\n"); 2037 kref_put(&io_req->refcount, bnx2fc_cmd_release); 2038 spin_unlock_bh(&tgt->tgt_lock); 2039 return -EAGAIN; 2040 } 2041 2042 if (!test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags)) { 2043 printk(KERN_ERR PFX "Session not ready...post_io\n"); 2044 kref_put(&io_req->refcount, bnx2fc_cmd_release); 2045 spin_unlock_bh(&tgt->tgt_lock); 2046 return -EAGAIN; 2047 } 2048 2049 /* Time IO req */ 2050 if (tgt->io_timeout) 2051 bnx2fc_cmd_timer_set(io_req, BNX2FC_IO_TIMEOUT); 2052 /* Obtain free SQ entry */ 2053 bnx2fc_add_2_sq(tgt, xid); 2054 2055 /* Enqueue the io_req to active_cmd_queue */ 2056 2057 io_req->on_active_queue = 1; 2058 /* move io_req from pending_queue to active_queue */ 2059 list_add_tail(&io_req->link, &tgt->active_cmd_queue); 2060 2061 /* Ring doorbell */ 2062 bnx2fc_ring_doorbell(tgt); 2063 spin_unlock_bh(&tgt->tgt_lock); 2064 return 0; 2065 } 2066