1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * QLogic FCoE Offload Driver 4 * Copyright (c) 2016-2018 Cavium Inc. 5 */ 6 #include <linux/spinlock.h> 7 #include <linux/vmalloc.h> 8 #include "qedf.h" 9 #include <scsi/scsi_tcq.h> 10 11 void qedf_cmd_timer_set(struct qedf_ctx *qedf, struct qedf_ioreq *io_req, 12 unsigned int timer_msec) 13 { 14 queue_delayed_work(qedf->timer_work_queue, &io_req->timeout_work, 15 msecs_to_jiffies(timer_msec)); 16 } 17 18 static void qedf_cmd_timeout(struct work_struct *work) 19 { 20 21 struct qedf_ioreq *io_req = 22 container_of(work, struct qedf_ioreq, timeout_work.work); 23 struct qedf_ctx *qedf; 24 struct qedf_rport *fcport; 25 26 fcport = io_req->fcport; 27 if (io_req->fcport == NULL) { 28 QEDF_INFO(NULL, QEDF_LOG_IO, "fcport is NULL.\n"); 29 return; 30 } 31 32 qedf = fcport->qedf; 33 34 switch (io_req->cmd_type) { 35 case QEDF_ABTS: 36 if (qedf == NULL) { 37 QEDF_INFO(NULL, QEDF_LOG_IO, 38 "qedf is NULL for ABTS xid=0x%x.\n", 39 io_req->xid); 40 return; 41 } 42 43 QEDF_ERR((&qedf->dbg_ctx), "ABTS timeout, xid=0x%x.\n", 44 io_req->xid); 45 /* Cleanup timed out ABTS */ 46 qedf_initiate_cleanup(io_req, true); 47 complete(&io_req->abts_done); 48 49 /* 50 * Need to call kref_put for reference taken when initiate_abts 51 * was called since abts_compl won't be called now that we've 52 * cleaned up the task. 53 */ 54 kref_put(&io_req->refcount, qedf_release_cmd); 55 56 /* Clear in abort bit now that we're done with the command */ 57 clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 58 59 /* 60 * Now that the original I/O and the ABTS are complete see 61 * if we need to reconnect to the target. 62 */ 63 qedf_restart_rport(fcport); 64 break; 65 case QEDF_ELS: 66 if (!qedf) { 67 QEDF_INFO(NULL, QEDF_LOG_IO, 68 "qedf is NULL for ELS xid=0x%x.\n", 69 io_req->xid); 70 return; 71 } 72 /* ELS request no longer outstanding since it timed out */ 73 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 74 75 kref_get(&io_req->refcount); 76 /* 77 * Don't attempt to clean an ELS timeout as any subseqeunt 78 * ABTS or cleanup requests just hang. For now just free 79 * the resources of the original I/O and the RRQ 80 */ 81 QEDF_ERR(&(qedf->dbg_ctx), "ELS timeout, xid=0x%x.\n", 82 io_req->xid); 83 qedf_initiate_cleanup(io_req, true); 84 io_req->event = QEDF_IOREQ_EV_ELS_TMO; 85 /* Call callback function to complete command */ 86 if (io_req->cb_func && io_req->cb_arg) { 87 io_req->cb_func(io_req->cb_arg); 88 io_req->cb_arg = NULL; 89 } 90 kref_put(&io_req->refcount, qedf_release_cmd); 91 break; 92 case QEDF_SEQ_CLEANUP: 93 QEDF_ERR(&(qedf->dbg_ctx), "Sequence cleanup timeout, " 94 "xid=0x%x.\n", io_req->xid); 95 qedf_initiate_cleanup(io_req, true); 96 io_req->event = QEDF_IOREQ_EV_ELS_TMO; 97 qedf_process_seq_cleanup_compl(qedf, NULL, io_req); 98 break; 99 default: 100 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 101 "Hit default case, xid=0x%x.\n", io_req->xid); 102 break; 103 } 104 } 105 106 void qedf_cmd_mgr_free(struct qedf_cmd_mgr *cmgr) 107 { 108 struct io_bdt *bdt_info; 109 struct qedf_ctx *qedf = cmgr->qedf; 110 size_t bd_tbl_sz; 111 u16 min_xid = 0; 112 u16 max_xid = (FCOE_PARAMS_NUM_TASKS - 1); 113 int num_ios; 114 int i; 115 struct qedf_ioreq *io_req; 116 117 num_ios = max_xid - min_xid + 1; 118 119 /* Free fcoe_bdt_ctx structures */ 120 if (!cmgr->io_bdt_pool) { 121 QEDF_ERR(&qedf->dbg_ctx, "io_bdt_pool is NULL.\n"); 122 goto free_cmd_pool; 123 } 124 125 bd_tbl_sz = QEDF_MAX_BDS_PER_CMD * sizeof(struct scsi_sge); 126 for (i = 0; i < num_ios; i++) { 127 bdt_info = cmgr->io_bdt_pool[i]; 128 if (bdt_info->bd_tbl) { 129 dma_free_coherent(&qedf->pdev->dev, bd_tbl_sz, 130 bdt_info->bd_tbl, bdt_info->bd_tbl_dma); 131 bdt_info->bd_tbl = NULL; 132 } 133 } 134 135 /* Destroy io_bdt pool */ 136 for (i = 0; i < num_ios; i++) { 137 kfree(cmgr->io_bdt_pool[i]); 138 cmgr->io_bdt_pool[i] = NULL; 139 } 140 141 kfree(cmgr->io_bdt_pool); 142 cmgr->io_bdt_pool = NULL; 143 144 free_cmd_pool: 145 146 for (i = 0; i < num_ios; i++) { 147 io_req = &cmgr->cmds[i]; 148 kfree(io_req->sgl_task_params); 149 kfree(io_req->task_params); 150 /* Make sure we free per command sense buffer */ 151 if (io_req->sense_buffer) 152 dma_free_coherent(&qedf->pdev->dev, 153 QEDF_SCSI_SENSE_BUFFERSIZE, io_req->sense_buffer, 154 io_req->sense_buffer_dma); 155 cancel_delayed_work_sync(&io_req->rrq_work); 156 } 157 158 /* Free command manager itself */ 159 vfree(cmgr); 160 } 161 162 static void qedf_handle_rrq(struct work_struct *work) 163 { 164 struct qedf_ioreq *io_req = 165 container_of(work, struct qedf_ioreq, rrq_work.work); 166 167 atomic_set(&io_req->state, QEDFC_CMD_ST_RRQ_ACTIVE); 168 qedf_send_rrq(io_req); 169 170 } 171 172 struct qedf_cmd_mgr *qedf_cmd_mgr_alloc(struct qedf_ctx *qedf) 173 { 174 struct qedf_cmd_mgr *cmgr; 175 struct io_bdt *bdt_info; 176 struct qedf_ioreq *io_req; 177 u16 xid; 178 int i; 179 int num_ios; 180 u16 min_xid = 0; 181 u16 max_xid = (FCOE_PARAMS_NUM_TASKS - 1); 182 183 /* Make sure num_queues is already set before calling this function */ 184 if (!qedf->num_queues) { 185 QEDF_ERR(&(qedf->dbg_ctx), "num_queues is not set.\n"); 186 return NULL; 187 } 188 189 if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) { 190 QEDF_WARN(&(qedf->dbg_ctx), "Invalid min_xid 0x%x and " 191 "max_xid 0x%x.\n", min_xid, max_xid); 192 return NULL; 193 } 194 195 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "min xid 0x%x, max xid " 196 "0x%x.\n", min_xid, max_xid); 197 198 num_ios = max_xid - min_xid + 1; 199 200 cmgr = vzalloc(sizeof(struct qedf_cmd_mgr)); 201 if (!cmgr) { 202 QEDF_WARN(&(qedf->dbg_ctx), "Failed to alloc cmd mgr.\n"); 203 return NULL; 204 } 205 206 cmgr->qedf = qedf; 207 spin_lock_init(&cmgr->lock); 208 209 /* 210 * Initialize I/O request fields. 211 */ 212 xid = 0; 213 214 for (i = 0; i < num_ios; i++) { 215 io_req = &cmgr->cmds[i]; 216 INIT_DELAYED_WORK(&io_req->timeout_work, qedf_cmd_timeout); 217 218 io_req->xid = xid++; 219 220 INIT_DELAYED_WORK(&io_req->rrq_work, qedf_handle_rrq); 221 222 /* Allocate DMA memory to hold sense buffer */ 223 io_req->sense_buffer = dma_alloc_coherent(&qedf->pdev->dev, 224 QEDF_SCSI_SENSE_BUFFERSIZE, &io_req->sense_buffer_dma, 225 GFP_KERNEL); 226 if (!io_req->sense_buffer) { 227 QEDF_ERR(&qedf->dbg_ctx, 228 "Failed to alloc sense buffer.\n"); 229 goto mem_err; 230 } 231 232 /* Allocate task parameters to pass to f/w init funcions */ 233 io_req->task_params = kzalloc(sizeof(*io_req->task_params), 234 GFP_KERNEL); 235 if (!io_req->task_params) { 236 QEDF_ERR(&(qedf->dbg_ctx), 237 "Failed to allocate task_params for xid=0x%x\n", 238 i); 239 goto mem_err; 240 } 241 242 /* 243 * Allocate scatter/gather list info to pass to f/w init 244 * functions. 245 */ 246 io_req->sgl_task_params = kzalloc( 247 sizeof(struct scsi_sgl_task_params), GFP_KERNEL); 248 if (!io_req->sgl_task_params) { 249 QEDF_ERR(&(qedf->dbg_ctx), 250 "Failed to allocate sgl_task_params for xid=0x%x\n", 251 i); 252 goto mem_err; 253 } 254 } 255 256 /* Allocate pool of io_bdts - one for each qedf_ioreq */ 257 cmgr->io_bdt_pool = kmalloc_array(num_ios, sizeof(struct io_bdt *), 258 GFP_KERNEL); 259 260 if (!cmgr->io_bdt_pool) { 261 QEDF_WARN(&(qedf->dbg_ctx), "Failed to alloc io_bdt_pool.\n"); 262 goto mem_err; 263 } 264 265 for (i = 0; i < num_ios; i++) { 266 cmgr->io_bdt_pool[i] = kmalloc(sizeof(struct io_bdt), 267 GFP_KERNEL); 268 if (!cmgr->io_bdt_pool[i]) { 269 QEDF_WARN(&(qedf->dbg_ctx), 270 "Failed to alloc io_bdt_pool[%d].\n", i); 271 goto mem_err; 272 } 273 } 274 275 for (i = 0; i < num_ios; i++) { 276 bdt_info = cmgr->io_bdt_pool[i]; 277 bdt_info->bd_tbl = dma_alloc_coherent(&qedf->pdev->dev, 278 QEDF_MAX_BDS_PER_CMD * sizeof(struct scsi_sge), 279 &bdt_info->bd_tbl_dma, GFP_KERNEL); 280 if (!bdt_info->bd_tbl) { 281 QEDF_WARN(&(qedf->dbg_ctx), 282 "Failed to alloc bdt_tbl[%d].\n", i); 283 goto mem_err; 284 } 285 } 286 atomic_set(&cmgr->free_list_cnt, num_ios); 287 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 288 "cmgr->free_list_cnt=%d.\n", 289 atomic_read(&cmgr->free_list_cnt)); 290 291 return cmgr; 292 293 mem_err: 294 qedf_cmd_mgr_free(cmgr); 295 return NULL; 296 } 297 298 struct qedf_ioreq *qedf_alloc_cmd(struct qedf_rport *fcport, u8 cmd_type) 299 { 300 struct qedf_ctx *qedf = fcport->qedf; 301 struct qedf_cmd_mgr *cmd_mgr = qedf->cmd_mgr; 302 struct qedf_ioreq *io_req = NULL; 303 struct io_bdt *bd_tbl; 304 u16 xid; 305 uint32_t free_sqes; 306 int i; 307 unsigned long flags; 308 309 free_sqes = atomic_read(&fcport->free_sqes); 310 311 if (!free_sqes) { 312 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 313 "Returning NULL, free_sqes=%d.\n ", 314 free_sqes); 315 goto out_failed; 316 } 317 318 /* Limit the number of outstanding R/W tasks */ 319 if ((atomic_read(&fcport->num_active_ios) >= 320 NUM_RW_TASKS_PER_CONNECTION)) { 321 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 322 "Returning NULL, num_active_ios=%d.\n", 323 atomic_read(&fcport->num_active_ios)); 324 goto out_failed; 325 } 326 327 /* Limit global TIDs certain tasks */ 328 if (atomic_read(&cmd_mgr->free_list_cnt) <= GBL_RSVD_TASKS) { 329 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 330 "Returning NULL, free_list_cnt=%d.\n", 331 atomic_read(&cmd_mgr->free_list_cnt)); 332 goto out_failed; 333 } 334 335 spin_lock_irqsave(&cmd_mgr->lock, flags); 336 for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) { 337 io_req = &cmd_mgr->cmds[cmd_mgr->idx]; 338 cmd_mgr->idx++; 339 if (cmd_mgr->idx == FCOE_PARAMS_NUM_TASKS) 340 cmd_mgr->idx = 0; 341 342 /* Check to make sure command was previously freed */ 343 if (!io_req->alloc) 344 break; 345 } 346 347 if (i == FCOE_PARAMS_NUM_TASKS) { 348 spin_unlock_irqrestore(&cmd_mgr->lock, flags); 349 goto out_failed; 350 } 351 352 if (test_bit(QEDF_CMD_DIRTY, &io_req->flags)) 353 QEDF_ERR(&qedf->dbg_ctx, 354 "io_req found to be dirty ox_id = 0x%x.\n", 355 io_req->xid); 356 357 /* Clear any flags now that we've reallocated the xid */ 358 io_req->flags = 0; 359 io_req->alloc = 1; 360 spin_unlock_irqrestore(&cmd_mgr->lock, flags); 361 362 atomic_inc(&fcport->num_active_ios); 363 atomic_dec(&fcport->free_sqes); 364 xid = io_req->xid; 365 atomic_dec(&cmd_mgr->free_list_cnt); 366 367 io_req->cmd_mgr = cmd_mgr; 368 io_req->fcport = fcport; 369 370 /* Clear any stale sc_cmd back pointer */ 371 io_req->sc_cmd = NULL; 372 io_req->lun = -1; 373 374 /* Hold the io_req against deletion */ 375 kref_init(&io_req->refcount); /* ID: 001 */ 376 atomic_set(&io_req->state, QEDFC_CMD_ST_IO_ACTIVE); 377 378 /* Bind io_bdt for this io_req */ 379 /* Have a static link between io_req and io_bdt_pool */ 380 bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; 381 if (bd_tbl == NULL) { 382 QEDF_ERR(&(qedf->dbg_ctx), "bd_tbl is NULL, xid=%x.\n", xid); 383 kref_put(&io_req->refcount, qedf_release_cmd); 384 goto out_failed; 385 } 386 bd_tbl->io_req = io_req; 387 io_req->cmd_type = cmd_type; 388 io_req->tm_flags = 0; 389 390 /* Reset sequence offset data */ 391 io_req->rx_buf_off = 0; 392 io_req->tx_buf_off = 0; 393 io_req->rx_id = 0xffff; /* No OX_ID */ 394 395 return io_req; 396 397 out_failed: 398 /* Record failure for stats and return NULL to caller */ 399 qedf->alloc_failures++; 400 return NULL; 401 } 402 403 static void qedf_free_mp_resc(struct qedf_ioreq *io_req) 404 { 405 struct qedf_mp_req *mp_req = &(io_req->mp_req); 406 struct qedf_ctx *qedf = io_req->fcport->qedf; 407 uint64_t sz = sizeof(struct scsi_sge); 408 409 /* clear tm flags */ 410 if (mp_req->mp_req_bd) { 411 dma_free_coherent(&qedf->pdev->dev, sz, 412 mp_req->mp_req_bd, mp_req->mp_req_bd_dma); 413 mp_req->mp_req_bd = NULL; 414 } 415 if (mp_req->mp_resp_bd) { 416 dma_free_coherent(&qedf->pdev->dev, sz, 417 mp_req->mp_resp_bd, mp_req->mp_resp_bd_dma); 418 mp_req->mp_resp_bd = NULL; 419 } 420 if (mp_req->req_buf) { 421 dma_free_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE, 422 mp_req->req_buf, mp_req->req_buf_dma); 423 mp_req->req_buf = NULL; 424 } 425 if (mp_req->resp_buf) { 426 dma_free_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE, 427 mp_req->resp_buf, mp_req->resp_buf_dma); 428 mp_req->resp_buf = NULL; 429 } 430 } 431 432 void qedf_release_cmd(struct kref *ref) 433 { 434 struct qedf_ioreq *io_req = 435 container_of(ref, struct qedf_ioreq, refcount); 436 struct qedf_cmd_mgr *cmd_mgr = io_req->cmd_mgr; 437 struct qedf_rport *fcport = io_req->fcport; 438 unsigned long flags; 439 440 if (io_req->cmd_type == QEDF_SCSI_CMD) { 441 QEDF_WARN(&fcport->qedf->dbg_ctx, 442 "Cmd released called without scsi_done called, io_req %p xid=0x%x.\n", 443 io_req, io_req->xid); 444 WARN_ON(io_req->sc_cmd); 445 } 446 447 if (io_req->cmd_type == QEDF_ELS || 448 io_req->cmd_type == QEDF_TASK_MGMT_CMD) 449 qedf_free_mp_resc(io_req); 450 451 atomic_inc(&cmd_mgr->free_list_cnt); 452 atomic_dec(&fcport->num_active_ios); 453 atomic_set(&io_req->state, QEDF_CMD_ST_INACTIVE); 454 if (atomic_read(&fcport->num_active_ios) < 0) { 455 QEDF_WARN(&(fcport->qedf->dbg_ctx), "active_ios < 0.\n"); 456 WARN_ON(1); 457 } 458 459 /* Increment task retry identifier now that the request is released */ 460 io_req->task_retry_identifier++; 461 io_req->fcport = NULL; 462 463 clear_bit(QEDF_CMD_DIRTY, &io_req->flags); 464 io_req->cpu = 0; 465 spin_lock_irqsave(&cmd_mgr->lock, flags); 466 io_req->fcport = NULL; 467 io_req->alloc = 0; 468 spin_unlock_irqrestore(&cmd_mgr->lock, flags); 469 } 470 471 static int qedf_map_sg(struct qedf_ioreq *io_req) 472 { 473 struct scsi_cmnd *sc = io_req->sc_cmd; 474 struct Scsi_Host *host = sc->device->host; 475 struct fc_lport *lport = shost_priv(host); 476 struct qedf_ctx *qedf = lport_priv(lport); 477 struct scsi_sge *bd = io_req->bd_tbl->bd_tbl; 478 struct scatterlist *sg; 479 int byte_count = 0; 480 int sg_count = 0; 481 int bd_count = 0; 482 u32 sg_len; 483 u64 addr; 484 int i = 0; 485 486 sg_count = dma_map_sg(&qedf->pdev->dev, scsi_sglist(sc), 487 scsi_sg_count(sc), sc->sc_data_direction); 488 sg = scsi_sglist(sc); 489 490 io_req->sge_type = QEDF_IOREQ_UNKNOWN_SGE; 491 492 if (sg_count <= 8 || io_req->io_req_flags == QEDF_READ) 493 io_req->sge_type = QEDF_IOREQ_FAST_SGE; 494 495 scsi_for_each_sg(sc, sg, sg_count, i) { 496 sg_len = (u32)sg_dma_len(sg); 497 addr = (u64)sg_dma_address(sg); 498 499 /* 500 * Intermediate s/g element so check if start address 501 * is page aligned. Only required for writes and only if the 502 * number of scatter/gather elements is 8 or more. 503 */ 504 if (io_req->sge_type == QEDF_IOREQ_UNKNOWN_SGE && (i) && 505 (i != (sg_count - 1)) && sg_len < QEDF_PAGE_SIZE) 506 io_req->sge_type = QEDF_IOREQ_SLOW_SGE; 507 508 bd[bd_count].sge_addr.lo = cpu_to_le32(U64_LO(addr)); 509 bd[bd_count].sge_addr.hi = cpu_to_le32(U64_HI(addr)); 510 bd[bd_count].sge_len = cpu_to_le32(sg_len); 511 512 bd_count++; 513 byte_count += sg_len; 514 } 515 516 /* To catch a case where FAST and SLOW nothing is set, set FAST */ 517 if (io_req->sge_type == QEDF_IOREQ_UNKNOWN_SGE) 518 io_req->sge_type = QEDF_IOREQ_FAST_SGE; 519 520 if (byte_count != scsi_bufflen(sc)) 521 QEDF_ERR(&(qedf->dbg_ctx), "byte_count = %d != " 522 "scsi_bufflen = %d, task_id = 0x%x.\n", byte_count, 523 scsi_bufflen(sc), io_req->xid); 524 525 return bd_count; 526 } 527 528 static int qedf_build_bd_list_from_sg(struct qedf_ioreq *io_req) 529 { 530 struct scsi_cmnd *sc = io_req->sc_cmd; 531 struct scsi_sge *bd = io_req->bd_tbl->bd_tbl; 532 int bd_count; 533 534 if (scsi_sg_count(sc)) { 535 bd_count = qedf_map_sg(io_req); 536 if (bd_count == 0) 537 return -ENOMEM; 538 } else { 539 bd_count = 0; 540 bd[0].sge_addr.lo = bd[0].sge_addr.hi = 0; 541 bd[0].sge_len = 0; 542 } 543 io_req->bd_tbl->bd_valid = bd_count; 544 545 return 0; 546 } 547 548 static void qedf_build_fcp_cmnd(struct qedf_ioreq *io_req, 549 struct fcp_cmnd *fcp_cmnd) 550 { 551 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 552 553 /* fcp_cmnd is 32 bytes */ 554 memset(fcp_cmnd, 0, FCP_CMND_LEN); 555 556 /* 8 bytes: SCSI LUN info */ 557 int_to_scsilun(sc_cmd->device->lun, 558 (struct scsi_lun *)&fcp_cmnd->fc_lun); 559 560 /* 4 bytes: flag info */ 561 fcp_cmnd->fc_pri_ta = 0; 562 fcp_cmnd->fc_tm_flags = io_req->tm_flags; 563 fcp_cmnd->fc_flags = io_req->io_req_flags; 564 fcp_cmnd->fc_cmdref = 0; 565 566 /* Populate data direction */ 567 if (io_req->cmd_type == QEDF_TASK_MGMT_CMD) { 568 fcp_cmnd->fc_flags |= FCP_CFL_RDDATA; 569 } else { 570 if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) 571 fcp_cmnd->fc_flags |= FCP_CFL_WRDATA; 572 else if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) 573 fcp_cmnd->fc_flags |= FCP_CFL_RDDATA; 574 } 575 576 fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE; 577 578 /* 16 bytes: CDB information */ 579 if (io_req->cmd_type != QEDF_TASK_MGMT_CMD) 580 memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len); 581 582 /* 4 bytes: FCP data length */ 583 fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len); 584 } 585 586 static void qedf_init_task(struct qedf_rport *fcport, struct fc_lport *lport, 587 struct qedf_ioreq *io_req, struct fcoe_task_context *task_ctx, 588 struct fcoe_wqe *sqe) 589 { 590 enum fcoe_task_type task_type; 591 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 592 struct io_bdt *bd_tbl = io_req->bd_tbl; 593 u8 fcp_cmnd[32]; 594 u32 tmp_fcp_cmnd[8]; 595 int bd_count = 0; 596 struct qedf_ctx *qedf = fcport->qedf; 597 uint16_t cq_idx = smp_processor_id() % qedf->num_queues; 598 struct regpair sense_data_buffer_phys_addr; 599 u32 tx_io_size = 0; 600 u32 rx_io_size = 0; 601 int i, cnt; 602 603 /* Note init_initiator_rw_fcoe_task memsets the task context */ 604 io_req->task = task_ctx; 605 memset(task_ctx, 0, sizeof(struct fcoe_task_context)); 606 memset(io_req->task_params, 0, sizeof(struct fcoe_task_params)); 607 memset(io_req->sgl_task_params, 0, sizeof(struct scsi_sgl_task_params)); 608 609 /* Set task type bassed on DMA directio of command */ 610 if (io_req->cmd_type == QEDF_TASK_MGMT_CMD) { 611 task_type = FCOE_TASK_TYPE_READ_INITIATOR; 612 } else { 613 if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { 614 task_type = FCOE_TASK_TYPE_WRITE_INITIATOR; 615 tx_io_size = io_req->data_xfer_len; 616 } else { 617 task_type = FCOE_TASK_TYPE_READ_INITIATOR; 618 rx_io_size = io_req->data_xfer_len; 619 } 620 } 621 622 /* Setup the fields for fcoe_task_params */ 623 io_req->task_params->context = task_ctx; 624 io_req->task_params->sqe = sqe; 625 io_req->task_params->task_type = task_type; 626 io_req->task_params->tx_io_size = tx_io_size; 627 io_req->task_params->rx_io_size = rx_io_size; 628 io_req->task_params->conn_cid = fcport->fw_cid; 629 io_req->task_params->itid = io_req->xid; 630 io_req->task_params->cq_rss_number = cq_idx; 631 io_req->task_params->is_tape_device = fcport->dev_type; 632 633 /* Fill in information for scatter/gather list */ 634 if (io_req->cmd_type != QEDF_TASK_MGMT_CMD) { 635 bd_count = bd_tbl->bd_valid; 636 io_req->sgl_task_params->sgl = bd_tbl->bd_tbl; 637 io_req->sgl_task_params->sgl_phys_addr.lo = 638 U64_LO(bd_tbl->bd_tbl_dma); 639 io_req->sgl_task_params->sgl_phys_addr.hi = 640 U64_HI(bd_tbl->bd_tbl_dma); 641 io_req->sgl_task_params->num_sges = bd_count; 642 io_req->sgl_task_params->total_buffer_size = 643 scsi_bufflen(io_req->sc_cmd); 644 if (io_req->sge_type == QEDF_IOREQ_SLOW_SGE) 645 io_req->sgl_task_params->small_mid_sge = 1; 646 else 647 io_req->sgl_task_params->small_mid_sge = 0; 648 } 649 650 /* Fill in physical address of sense buffer */ 651 sense_data_buffer_phys_addr.lo = U64_LO(io_req->sense_buffer_dma); 652 sense_data_buffer_phys_addr.hi = U64_HI(io_req->sense_buffer_dma); 653 654 /* fill FCP_CMND IU */ 655 qedf_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tmp_fcp_cmnd); 656 657 /* Swap fcp_cmnd since FC is big endian */ 658 cnt = sizeof(struct fcp_cmnd) / sizeof(u32); 659 for (i = 0; i < cnt; i++) { 660 tmp_fcp_cmnd[i] = cpu_to_be32(tmp_fcp_cmnd[i]); 661 } 662 memcpy(fcp_cmnd, tmp_fcp_cmnd, sizeof(struct fcp_cmnd)); 663 664 init_initiator_rw_fcoe_task(io_req->task_params, 665 io_req->sgl_task_params, 666 sense_data_buffer_phys_addr, 667 io_req->task_retry_identifier, fcp_cmnd); 668 669 /* Increment SGL type counters */ 670 if (io_req->sge_type == QEDF_IOREQ_SLOW_SGE) 671 qedf->slow_sge_ios++; 672 else 673 qedf->fast_sge_ios++; 674 } 675 676 void qedf_init_mp_task(struct qedf_ioreq *io_req, 677 struct fcoe_task_context *task_ctx, struct fcoe_wqe *sqe) 678 { 679 struct qedf_mp_req *mp_req = &(io_req->mp_req); 680 struct qedf_rport *fcport = io_req->fcport; 681 struct qedf_ctx *qedf = io_req->fcport->qedf; 682 struct fc_frame_header *fc_hdr; 683 struct fcoe_tx_mid_path_params task_fc_hdr; 684 struct scsi_sgl_task_params tx_sgl_task_params; 685 struct scsi_sgl_task_params rx_sgl_task_params; 686 687 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, 688 "Initializing MP task for cmd_type=%d\n", 689 io_req->cmd_type); 690 691 qedf->control_requests++; 692 693 memset(&tx_sgl_task_params, 0, sizeof(struct scsi_sgl_task_params)); 694 memset(&rx_sgl_task_params, 0, sizeof(struct scsi_sgl_task_params)); 695 memset(task_ctx, 0, sizeof(struct fcoe_task_context)); 696 memset(&task_fc_hdr, 0, sizeof(struct fcoe_tx_mid_path_params)); 697 698 /* Setup the task from io_req for easy reference */ 699 io_req->task = task_ctx; 700 701 /* Setup the fields for fcoe_task_params */ 702 io_req->task_params->context = task_ctx; 703 io_req->task_params->sqe = sqe; 704 io_req->task_params->task_type = FCOE_TASK_TYPE_MIDPATH; 705 io_req->task_params->tx_io_size = io_req->data_xfer_len; 706 /* rx_io_size tells the f/w how large a response buffer we have */ 707 io_req->task_params->rx_io_size = PAGE_SIZE; 708 io_req->task_params->conn_cid = fcport->fw_cid; 709 io_req->task_params->itid = io_req->xid; 710 /* Return middle path commands on CQ 0 */ 711 io_req->task_params->cq_rss_number = 0; 712 io_req->task_params->is_tape_device = fcport->dev_type; 713 714 fc_hdr = &(mp_req->req_fc_hdr); 715 /* Set OX_ID and RX_ID based on driver task id */ 716 fc_hdr->fh_ox_id = io_req->xid; 717 fc_hdr->fh_rx_id = htons(0xffff); 718 719 /* Set up FC header information */ 720 task_fc_hdr.parameter = fc_hdr->fh_parm_offset; 721 task_fc_hdr.r_ctl = fc_hdr->fh_r_ctl; 722 task_fc_hdr.type = fc_hdr->fh_type; 723 task_fc_hdr.cs_ctl = fc_hdr->fh_cs_ctl; 724 task_fc_hdr.df_ctl = fc_hdr->fh_df_ctl; 725 task_fc_hdr.rx_id = fc_hdr->fh_rx_id; 726 task_fc_hdr.ox_id = fc_hdr->fh_ox_id; 727 728 /* Set up s/g list parameters for request buffer */ 729 tx_sgl_task_params.sgl = mp_req->mp_req_bd; 730 tx_sgl_task_params.sgl_phys_addr.lo = U64_LO(mp_req->mp_req_bd_dma); 731 tx_sgl_task_params.sgl_phys_addr.hi = U64_HI(mp_req->mp_req_bd_dma); 732 tx_sgl_task_params.num_sges = 1; 733 /* Set PAGE_SIZE for now since sg element is that size ??? */ 734 tx_sgl_task_params.total_buffer_size = io_req->data_xfer_len; 735 tx_sgl_task_params.small_mid_sge = 0; 736 737 /* Set up s/g list parameters for request buffer */ 738 rx_sgl_task_params.sgl = mp_req->mp_resp_bd; 739 rx_sgl_task_params.sgl_phys_addr.lo = U64_LO(mp_req->mp_resp_bd_dma); 740 rx_sgl_task_params.sgl_phys_addr.hi = U64_HI(mp_req->mp_resp_bd_dma); 741 rx_sgl_task_params.num_sges = 1; 742 /* Set PAGE_SIZE for now since sg element is that size ??? */ 743 rx_sgl_task_params.total_buffer_size = PAGE_SIZE; 744 rx_sgl_task_params.small_mid_sge = 0; 745 746 747 /* 748 * Last arg is 0 as previous code did not set that we wanted the 749 * fc header information. 750 */ 751 init_initiator_midpath_unsolicited_fcoe_task(io_req->task_params, 752 &task_fc_hdr, 753 &tx_sgl_task_params, 754 &rx_sgl_task_params, 0); 755 } 756 757 /* Presumed that fcport->rport_lock is held */ 758 u16 qedf_get_sqe_idx(struct qedf_rport *fcport) 759 { 760 uint16_t total_sqe = (fcport->sq_mem_size)/(sizeof(struct fcoe_wqe)); 761 u16 rval; 762 763 rval = fcport->sq_prod_idx; 764 765 /* Adjust ring index */ 766 fcport->sq_prod_idx++; 767 fcport->fw_sq_prod_idx++; 768 if (fcport->sq_prod_idx == total_sqe) 769 fcport->sq_prod_idx = 0; 770 771 return rval; 772 } 773 774 void qedf_ring_doorbell(struct qedf_rport *fcport) 775 { 776 struct fcoe_db_data dbell = { 0 }; 777 778 dbell.agg_flags = 0; 779 780 dbell.params |= DB_DEST_XCM << FCOE_DB_DATA_DEST_SHIFT; 781 dbell.params |= DB_AGG_CMD_SET << FCOE_DB_DATA_AGG_CMD_SHIFT; 782 dbell.params |= DQ_XCM_FCOE_SQ_PROD_CMD << 783 FCOE_DB_DATA_AGG_VAL_SEL_SHIFT; 784 785 dbell.sq_prod = fcport->fw_sq_prod_idx; 786 /* wmb makes sure that the BDs data is updated before updating the 787 * producer, otherwise FW may read old data from the BDs. 788 */ 789 wmb(); 790 barrier(); 791 writel(*(u32 *)&dbell, fcport->p_doorbell); 792 /* 793 * Fence required to flush the write combined buffer, since another 794 * CPU may write to the same doorbell address and data may be lost 795 * due to relaxed order nature of write combined bar. 796 */ 797 wmb(); 798 } 799 800 static void qedf_trace_io(struct qedf_rport *fcport, struct qedf_ioreq *io_req, 801 int8_t direction) 802 { 803 struct qedf_ctx *qedf = fcport->qedf; 804 struct qedf_io_log *io_log; 805 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 806 unsigned long flags; 807 808 spin_lock_irqsave(&qedf->io_trace_lock, flags); 809 810 io_log = &qedf->io_trace_buf[qedf->io_trace_idx]; 811 io_log->direction = direction; 812 io_log->task_id = io_req->xid; 813 io_log->port_id = fcport->rdata->ids.port_id; 814 io_log->lun = sc_cmd->device->lun; 815 io_log->op = sc_cmd->cmnd[0]; 816 io_log->lba[0] = sc_cmd->cmnd[2]; 817 io_log->lba[1] = sc_cmd->cmnd[3]; 818 io_log->lba[2] = sc_cmd->cmnd[4]; 819 io_log->lba[3] = sc_cmd->cmnd[5]; 820 io_log->bufflen = scsi_bufflen(sc_cmd); 821 io_log->sg_count = scsi_sg_count(sc_cmd); 822 io_log->result = sc_cmd->result; 823 io_log->jiffies = jiffies; 824 io_log->refcount = kref_read(&io_req->refcount); 825 826 if (direction == QEDF_IO_TRACE_REQ) { 827 /* For requests we only care abot the submission CPU */ 828 io_log->req_cpu = io_req->cpu; 829 io_log->int_cpu = 0; 830 io_log->rsp_cpu = 0; 831 } else if (direction == QEDF_IO_TRACE_RSP) { 832 io_log->req_cpu = io_req->cpu; 833 io_log->int_cpu = io_req->int_cpu; 834 io_log->rsp_cpu = smp_processor_id(); 835 } 836 837 io_log->sge_type = io_req->sge_type; 838 839 qedf->io_trace_idx++; 840 if (qedf->io_trace_idx == QEDF_IO_TRACE_SIZE) 841 qedf->io_trace_idx = 0; 842 843 spin_unlock_irqrestore(&qedf->io_trace_lock, flags); 844 } 845 846 int qedf_post_io_req(struct qedf_rport *fcport, struct qedf_ioreq *io_req) 847 { 848 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 849 struct Scsi_Host *host = sc_cmd->device->host; 850 struct fc_lport *lport = shost_priv(host); 851 struct qedf_ctx *qedf = lport_priv(lport); 852 struct fcoe_task_context *task_ctx; 853 u16 xid; 854 struct fcoe_wqe *sqe; 855 u16 sqe_idx; 856 857 /* Initialize rest of io_req fileds */ 858 io_req->data_xfer_len = scsi_bufflen(sc_cmd); 859 qedf_priv(sc_cmd)->io_req = io_req; 860 io_req->sge_type = QEDF_IOREQ_FAST_SGE; /* Assume fast SGL by default */ 861 862 /* Record which cpu this request is associated with */ 863 io_req->cpu = smp_processor_id(); 864 865 if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) { 866 io_req->io_req_flags = QEDF_READ; 867 qedf->input_requests++; 868 } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { 869 io_req->io_req_flags = QEDF_WRITE; 870 qedf->output_requests++; 871 } else { 872 io_req->io_req_flags = 0; 873 qedf->control_requests++; 874 } 875 876 xid = io_req->xid; 877 878 /* Build buffer descriptor list for firmware from sg list */ 879 if (qedf_build_bd_list_from_sg(io_req)) { 880 QEDF_ERR(&(qedf->dbg_ctx), "BD list creation failed.\n"); 881 /* Release cmd will release io_req, but sc_cmd is assigned */ 882 io_req->sc_cmd = NULL; 883 kref_put(&io_req->refcount, qedf_release_cmd); 884 return -EAGAIN; 885 } 886 887 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) || 888 test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 889 QEDF_ERR(&(qedf->dbg_ctx), "Session not offloaded yet.\n"); 890 /* Release cmd will release io_req, but sc_cmd is assigned */ 891 io_req->sc_cmd = NULL; 892 kref_put(&io_req->refcount, qedf_release_cmd); 893 return -EINVAL; 894 } 895 896 /* Record LUN number for later use if we need them */ 897 io_req->lun = (int)sc_cmd->device->lun; 898 899 /* Obtain free SQE */ 900 sqe_idx = qedf_get_sqe_idx(fcport); 901 sqe = &fcport->sq[sqe_idx]; 902 memset(sqe, 0, sizeof(struct fcoe_wqe)); 903 904 /* Get the task context */ 905 task_ctx = qedf_get_task_mem(&qedf->tasks, xid); 906 if (!task_ctx) { 907 QEDF_WARN(&(qedf->dbg_ctx), "task_ctx is NULL, xid=%d.\n", 908 xid); 909 /* Release cmd will release io_req, but sc_cmd is assigned */ 910 io_req->sc_cmd = NULL; 911 kref_put(&io_req->refcount, qedf_release_cmd); 912 return -EINVAL; 913 } 914 915 qedf_init_task(fcport, lport, io_req, task_ctx, sqe); 916 917 /* Ring doorbell */ 918 qedf_ring_doorbell(fcport); 919 920 /* Set that command is with the firmware now */ 921 set_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 922 923 if (qedf_io_tracing && io_req->sc_cmd) 924 qedf_trace_io(fcport, io_req, QEDF_IO_TRACE_REQ); 925 926 return false; 927 } 928 929 int 930 qedf_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc_cmd) 931 { 932 struct fc_lport *lport = shost_priv(host); 933 struct qedf_ctx *qedf = lport_priv(lport); 934 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 935 struct fc_rport_libfc_priv *rp = rport->dd_data; 936 struct qedf_rport *fcport; 937 struct qedf_ioreq *io_req; 938 int rc = 0; 939 int rval; 940 unsigned long flags = 0; 941 int num_sgs = 0; 942 943 num_sgs = scsi_sg_count(sc_cmd); 944 if (scsi_sg_count(sc_cmd) > QEDF_MAX_BDS_PER_CMD) { 945 QEDF_ERR(&qedf->dbg_ctx, 946 "Number of SG elements %d exceeds what hardware limitation of %d.\n", 947 num_sgs, QEDF_MAX_BDS_PER_CMD); 948 sc_cmd->result = DID_ERROR; 949 scsi_done(sc_cmd); 950 return 0; 951 } 952 953 if (test_bit(QEDF_UNLOADING, &qedf->flags) || 954 test_bit(QEDF_DBG_STOP_IO, &qedf->flags)) { 955 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 956 "Returning DNC as unloading or stop io, flags 0x%lx.\n", 957 qedf->flags); 958 sc_cmd->result = DID_NO_CONNECT << 16; 959 scsi_done(sc_cmd); 960 return 0; 961 } 962 963 if (!qedf->pdev->msix_enabled) { 964 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 965 "Completing sc_cmd=%p DID_NO_CONNECT as MSI-X is not enabled.\n", 966 sc_cmd); 967 sc_cmd->result = DID_NO_CONNECT << 16; 968 scsi_done(sc_cmd); 969 return 0; 970 } 971 972 rval = fc_remote_port_chkready(rport); 973 if (rval) { 974 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 975 "fc_remote_port_chkready failed=0x%x for port_id=0x%06x.\n", 976 rval, rport->port_id); 977 sc_cmd->result = rval; 978 scsi_done(sc_cmd); 979 return 0; 980 } 981 982 /* Retry command if we are doing a qed drain operation */ 983 if (test_bit(QEDF_DRAIN_ACTIVE, &qedf->flags)) { 984 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Drain active.\n"); 985 rc = SCSI_MLQUEUE_HOST_BUSY; 986 goto exit_qcmd; 987 } 988 989 if (lport->state != LPORT_ST_READY || 990 atomic_read(&qedf->link_state) != QEDF_LINK_UP) { 991 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Link down.\n"); 992 rc = SCSI_MLQUEUE_HOST_BUSY; 993 goto exit_qcmd; 994 } 995 996 /* rport and tgt are allocated together, so tgt should be non-NULL */ 997 fcport = (struct qedf_rport *)&rp[1]; 998 999 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) || 1000 test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 1001 /* 1002 * Session is not offloaded yet. Let SCSI-ml retry 1003 * the command. 1004 */ 1005 rc = SCSI_MLQUEUE_TARGET_BUSY; 1006 goto exit_qcmd; 1007 } 1008 1009 atomic_inc(&fcport->ios_to_queue); 1010 1011 if (fcport->retry_delay_timestamp) { 1012 /* Take fcport->rport_lock for resetting the delay_timestamp */ 1013 spin_lock_irqsave(&fcport->rport_lock, flags); 1014 if (time_after(jiffies, fcport->retry_delay_timestamp)) { 1015 fcport->retry_delay_timestamp = 0; 1016 } else { 1017 spin_unlock_irqrestore(&fcport->rport_lock, flags); 1018 /* If retry_delay timer is active, flow off the ML */ 1019 rc = SCSI_MLQUEUE_TARGET_BUSY; 1020 atomic_dec(&fcport->ios_to_queue); 1021 goto exit_qcmd; 1022 } 1023 spin_unlock_irqrestore(&fcport->rport_lock, flags); 1024 } 1025 1026 io_req = qedf_alloc_cmd(fcport, QEDF_SCSI_CMD); 1027 if (!io_req) { 1028 rc = SCSI_MLQUEUE_HOST_BUSY; 1029 atomic_dec(&fcport->ios_to_queue); 1030 goto exit_qcmd; 1031 } 1032 1033 io_req->sc_cmd = sc_cmd; 1034 1035 /* Take fcport->rport_lock for posting to fcport send queue */ 1036 spin_lock_irqsave(&fcport->rport_lock, flags); 1037 if (qedf_post_io_req(fcport, io_req)) { 1038 QEDF_WARN(&(qedf->dbg_ctx), "Unable to post io_req\n"); 1039 /* Return SQE to pool */ 1040 atomic_inc(&fcport->free_sqes); 1041 rc = SCSI_MLQUEUE_HOST_BUSY; 1042 } 1043 spin_unlock_irqrestore(&fcport->rport_lock, flags); 1044 atomic_dec(&fcport->ios_to_queue); 1045 1046 exit_qcmd: 1047 return rc; 1048 } 1049 1050 static void qedf_parse_fcp_rsp(struct qedf_ioreq *io_req, 1051 struct fcoe_cqe_rsp_info *fcp_rsp) 1052 { 1053 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1054 struct qedf_ctx *qedf = io_req->fcport->qedf; 1055 u8 rsp_flags = fcp_rsp->rsp_flags.flags; 1056 int fcp_sns_len = 0; 1057 int fcp_rsp_len = 0; 1058 uint8_t *rsp_info, *sense_data; 1059 1060 io_req->fcp_status = FC_GOOD; 1061 io_req->fcp_resid = 0; 1062 if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER | 1063 FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER)) 1064 io_req->fcp_resid = fcp_rsp->fcp_resid; 1065 1066 io_req->scsi_comp_flags = rsp_flags; 1067 io_req->cdb_status = fcp_rsp->scsi_status_code; 1068 1069 if (rsp_flags & 1070 FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) 1071 fcp_rsp_len = fcp_rsp->fcp_rsp_len; 1072 1073 if (rsp_flags & 1074 FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) 1075 fcp_sns_len = fcp_rsp->fcp_sns_len; 1076 1077 io_req->fcp_rsp_len = fcp_rsp_len; 1078 io_req->fcp_sns_len = fcp_sns_len; 1079 rsp_info = sense_data = io_req->sense_buffer; 1080 1081 /* fetch fcp_rsp_code */ 1082 if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) { 1083 /* Only for task management function */ 1084 io_req->fcp_rsp_code = rsp_info[3]; 1085 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1086 "fcp_rsp_code = %d\n", io_req->fcp_rsp_code); 1087 /* Adjust sense-data location. */ 1088 sense_data += fcp_rsp_len; 1089 } 1090 1091 if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) { 1092 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1093 "Truncating sense buffer\n"); 1094 fcp_sns_len = SCSI_SENSE_BUFFERSIZE; 1095 } 1096 1097 /* The sense buffer can be NULL for TMF commands */ 1098 if (sc_cmd->sense_buffer) { 1099 memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1100 if (fcp_sns_len) 1101 memcpy(sc_cmd->sense_buffer, sense_data, 1102 fcp_sns_len); 1103 } 1104 } 1105 1106 static void qedf_unmap_sg_list(struct qedf_ctx *qedf, struct qedf_ioreq *io_req) 1107 { 1108 struct scsi_cmnd *sc = io_req->sc_cmd; 1109 1110 if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) { 1111 dma_unmap_sg(&qedf->pdev->dev, scsi_sglist(sc), 1112 scsi_sg_count(sc), sc->sc_data_direction); 1113 io_req->bd_tbl->bd_valid = 0; 1114 } 1115 } 1116 1117 void qedf_scsi_completion(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1118 struct qedf_ioreq *io_req) 1119 { 1120 struct scsi_cmnd *sc_cmd; 1121 struct fcoe_cqe_rsp_info *fcp_rsp; 1122 struct qedf_rport *fcport; 1123 int refcount; 1124 u16 scope, qualifier = 0; 1125 u8 fw_residual_flag = 0; 1126 unsigned long flags = 0; 1127 u16 chk_scope = 0; 1128 1129 if (!io_req) 1130 return; 1131 if (!cqe) 1132 return; 1133 1134 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || 1135 test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags) || 1136 test_bit(QEDF_CMD_IN_ABORT, &io_req->flags)) { 1137 QEDF_ERR(&qedf->dbg_ctx, 1138 "io_req xid=0x%x already in cleanup or abort processing or already completed.\n", 1139 io_req->xid); 1140 return; 1141 } 1142 1143 sc_cmd = io_req->sc_cmd; 1144 fcp_rsp = &cqe->cqe_info.rsp_info; 1145 1146 if (!sc_cmd) { 1147 QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd is NULL!\n"); 1148 return; 1149 } 1150 1151 if (!qedf_priv(sc_cmd)->io_req) { 1152 QEDF_WARN(&(qedf->dbg_ctx), 1153 "io_req is NULL, returned in another context.\n"); 1154 return; 1155 } 1156 1157 if (!sc_cmd->device) { 1158 QEDF_ERR(&qedf->dbg_ctx, 1159 "Device for sc_cmd %p is NULL.\n", sc_cmd); 1160 return; 1161 } 1162 1163 if (!scsi_cmd_to_rq(sc_cmd)->q) { 1164 QEDF_WARN(&(qedf->dbg_ctx), "request->q is NULL so request " 1165 "is not valid, sc_cmd=%p.\n", sc_cmd); 1166 return; 1167 } 1168 1169 fcport = io_req->fcport; 1170 1171 /* 1172 * When flush is active, let the cmds be completed from the cleanup 1173 * context 1174 */ 1175 if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags) || 1176 (test_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags) && 1177 sc_cmd->device->lun == (u64)fcport->lun_reset_lun)) { 1178 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1179 "Dropping good completion xid=0x%x as fcport is flushing", 1180 io_req->xid); 1181 return; 1182 } 1183 1184 qedf_parse_fcp_rsp(io_req, fcp_rsp); 1185 1186 qedf_unmap_sg_list(qedf, io_req); 1187 1188 /* Check for FCP transport error */ 1189 if (io_req->fcp_rsp_len > 3 && io_req->fcp_rsp_code) { 1190 QEDF_ERR(&(qedf->dbg_ctx), 1191 "FCP I/O protocol failure xid=0x%x fcp_rsp_len=%d " 1192 "fcp_rsp_code=%d.\n", io_req->xid, io_req->fcp_rsp_len, 1193 io_req->fcp_rsp_code); 1194 sc_cmd->result = DID_BUS_BUSY << 16; 1195 goto out; 1196 } 1197 1198 fw_residual_flag = GET_FIELD(cqe->cqe_info.rsp_info.fw_error_flags, 1199 FCOE_CQE_RSP_INFO_FW_UNDERRUN); 1200 if (fw_residual_flag) { 1201 QEDF_ERR(&qedf->dbg_ctx, 1202 "Firmware detected underrun: xid=0x%x fcp_rsp.flags=0x%02x fcp_resid=%d fw_residual=0x%x lba=%02x%02x%02x%02x.\n", 1203 io_req->xid, fcp_rsp->rsp_flags.flags, 1204 io_req->fcp_resid, 1205 cqe->cqe_info.rsp_info.fw_residual, sc_cmd->cmnd[2], 1206 sc_cmd->cmnd[3], sc_cmd->cmnd[4], sc_cmd->cmnd[5]); 1207 1208 if (io_req->cdb_status == 0) 1209 sc_cmd->result = (DID_ERROR << 16) | io_req->cdb_status; 1210 else 1211 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1212 1213 /* 1214 * Set resid to the whole buffer length so we won't try to resue 1215 * any previously data. 1216 */ 1217 scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); 1218 goto out; 1219 } 1220 1221 switch (io_req->fcp_status) { 1222 case FC_GOOD: 1223 if (io_req->cdb_status == 0) { 1224 /* Good I/O completion */ 1225 sc_cmd->result = DID_OK << 16; 1226 } else { 1227 refcount = kref_read(&io_req->refcount); 1228 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1229 "%d:0:%d:%lld xid=0x%0x op=0x%02x " 1230 "lba=%02x%02x%02x%02x cdb_status=%d " 1231 "fcp_resid=0x%x refcount=%d.\n", 1232 qedf->lport->host->host_no, sc_cmd->device->id, 1233 sc_cmd->device->lun, io_req->xid, 1234 sc_cmd->cmnd[0], sc_cmd->cmnd[2], sc_cmd->cmnd[3], 1235 sc_cmd->cmnd[4], sc_cmd->cmnd[5], 1236 io_req->cdb_status, io_req->fcp_resid, 1237 refcount); 1238 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1239 1240 if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL || 1241 io_req->cdb_status == SAM_STAT_BUSY) { 1242 /* 1243 * Check whether we need to set retry_delay at 1244 * all based on retry_delay module parameter 1245 * and the status qualifier. 1246 */ 1247 1248 /* Upper 2 bits */ 1249 scope = fcp_rsp->retry_delay_timer & 0xC000; 1250 /* Lower 14 bits */ 1251 qualifier = fcp_rsp->retry_delay_timer & 0x3FFF; 1252 1253 if (qedf_retry_delay) 1254 chk_scope = 1; 1255 /* Record stats */ 1256 if (io_req->cdb_status == 1257 SAM_STAT_TASK_SET_FULL) 1258 qedf->task_set_fulls++; 1259 else 1260 qedf->busy++; 1261 } 1262 } 1263 if (io_req->fcp_resid) 1264 scsi_set_resid(sc_cmd, io_req->fcp_resid); 1265 1266 if (chk_scope == 1) { 1267 if ((scope == 1 || scope == 2) && 1268 (qualifier > 0 && qualifier <= 0x3FEF)) { 1269 /* Check we don't go over the max */ 1270 if (qualifier > QEDF_RETRY_DELAY_MAX) { 1271 qualifier = QEDF_RETRY_DELAY_MAX; 1272 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1273 "qualifier = %d\n", 1274 (fcp_rsp->retry_delay_timer & 1275 0x3FFF)); 1276 } 1277 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1278 "Scope = %d and qualifier = %d", 1279 scope, qualifier); 1280 /* Take fcport->rport_lock to 1281 * update the retry_delay_timestamp 1282 */ 1283 spin_lock_irqsave(&fcport->rport_lock, flags); 1284 fcport->retry_delay_timestamp = 1285 jiffies + (qualifier * HZ / 10); 1286 spin_unlock_irqrestore(&fcport->rport_lock, 1287 flags); 1288 1289 } else { 1290 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1291 "combination of scope = %d and qualifier = %d is not handled in qedf.\n", 1292 scope, qualifier); 1293 } 1294 } 1295 break; 1296 default: 1297 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "fcp_status=%d.\n", 1298 io_req->fcp_status); 1299 break; 1300 } 1301 1302 out: 1303 if (qedf_io_tracing) 1304 qedf_trace_io(fcport, io_req, QEDF_IO_TRACE_RSP); 1305 1306 /* 1307 * We wait till the end of the function to clear the 1308 * outstanding bit in case we need to send an abort 1309 */ 1310 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 1311 1312 io_req->sc_cmd = NULL; 1313 qedf_priv(sc_cmd)->io_req = NULL; 1314 scsi_done(sc_cmd); 1315 kref_put(&io_req->refcount, qedf_release_cmd); 1316 } 1317 1318 /* Return a SCSI command in some other context besides a normal completion */ 1319 void qedf_scsi_done(struct qedf_ctx *qedf, struct qedf_ioreq *io_req, 1320 int result) 1321 { 1322 struct scsi_cmnd *sc_cmd; 1323 int refcount; 1324 1325 if (!io_req) { 1326 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "io_req is NULL\n"); 1327 return; 1328 } 1329 1330 if (test_and_set_bit(QEDF_CMD_ERR_SCSI_DONE, &io_req->flags)) { 1331 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1332 "io_req:%p scsi_done handling already done\n", 1333 io_req); 1334 return; 1335 } 1336 1337 /* 1338 * We will be done with this command after this call so clear the 1339 * outstanding bit. 1340 */ 1341 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 1342 1343 sc_cmd = io_req->sc_cmd; 1344 1345 if (!sc_cmd) { 1346 QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd is NULL!\n"); 1347 return; 1348 } 1349 1350 if (!virt_addr_valid(sc_cmd)) { 1351 QEDF_ERR(&qedf->dbg_ctx, "sc_cmd=%p is not valid.", sc_cmd); 1352 goto bad_scsi_ptr; 1353 } 1354 1355 if (!qedf_priv(sc_cmd)->io_req) { 1356 QEDF_WARN(&(qedf->dbg_ctx), 1357 "io_req is NULL, returned in another context.\n"); 1358 return; 1359 } 1360 1361 if (!sc_cmd->device) { 1362 QEDF_ERR(&qedf->dbg_ctx, "Device for sc_cmd %p is NULL.\n", 1363 sc_cmd); 1364 goto bad_scsi_ptr; 1365 } 1366 1367 if (!virt_addr_valid(sc_cmd->device)) { 1368 QEDF_ERR(&qedf->dbg_ctx, 1369 "Device pointer for sc_cmd %p is bad.\n", sc_cmd); 1370 goto bad_scsi_ptr; 1371 } 1372 1373 if (!sc_cmd->sense_buffer) { 1374 QEDF_ERR(&qedf->dbg_ctx, 1375 "sc_cmd->sense_buffer for sc_cmd %p is NULL.\n", 1376 sc_cmd); 1377 goto bad_scsi_ptr; 1378 } 1379 1380 if (!virt_addr_valid(sc_cmd->sense_buffer)) { 1381 QEDF_ERR(&qedf->dbg_ctx, 1382 "sc_cmd->sense_buffer for sc_cmd %p is bad.\n", 1383 sc_cmd); 1384 goto bad_scsi_ptr; 1385 } 1386 1387 qedf_unmap_sg_list(qedf, io_req); 1388 1389 sc_cmd->result = result << 16; 1390 refcount = kref_read(&io_req->refcount); 1391 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "%d:0:%d:%lld: Completing " 1392 "sc_cmd=%p result=0x%08x op=0x%02x lba=0x%02x%02x%02x%02x, " 1393 "allowed=%d retries=%d refcount=%d.\n", 1394 qedf->lport->host->host_no, sc_cmd->device->id, 1395 sc_cmd->device->lun, sc_cmd, sc_cmd->result, sc_cmd->cmnd[0], 1396 sc_cmd->cmnd[2], sc_cmd->cmnd[3], sc_cmd->cmnd[4], 1397 sc_cmd->cmnd[5], sc_cmd->allowed, sc_cmd->retries, 1398 refcount); 1399 1400 /* 1401 * Set resid to the whole buffer length so we won't try to resue any 1402 * previously read data 1403 */ 1404 scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); 1405 1406 if (qedf_io_tracing) 1407 qedf_trace_io(io_req->fcport, io_req, QEDF_IO_TRACE_RSP); 1408 1409 io_req->sc_cmd = NULL; 1410 qedf_priv(sc_cmd)->io_req = NULL; 1411 scsi_done(sc_cmd); 1412 kref_put(&io_req->refcount, qedf_release_cmd); 1413 return; 1414 1415 bad_scsi_ptr: 1416 /* 1417 * Clear the io_req->sc_cmd backpointer so we don't try to process 1418 * this again 1419 */ 1420 io_req->sc_cmd = NULL; 1421 kref_put(&io_req->refcount, qedf_release_cmd); /* ID: 001 */ 1422 } 1423 1424 /* 1425 * Handle warning type CQE completions. This is mainly used for REC timer 1426 * popping. 1427 */ 1428 void qedf_process_warning_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1429 struct qedf_ioreq *io_req) 1430 { 1431 int rval, i; 1432 struct qedf_rport *fcport = io_req->fcport; 1433 u64 err_warn_bit_map; 1434 u8 err_warn = 0xff; 1435 1436 if (!cqe) { 1437 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1438 "cqe is NULL for io_req %p xid=0x%x\n", 1439 io_req, io_req->xid); 1440 return; 1441 } 1442 1443 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "Warning CQE, " 1444 "xid=0x%x\n", io_req->xid); 1445 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), 1446 "err_warn_bitmap=%08x:%08x\n", 1447 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_hi), 1448 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_lo)); 1449 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "tx_buff_off=%08x, " 1450 "rx_buff_off=%08x, rx_id=%04x\n", 1451 le32_to_cpu(cqe->cqe_info.err_info.tx_buf_off), 1452 le32_to_cpu(cqe->cqe_info.err_info.rx_buf_off), 1453 le32_to_cpu(cqe->cqe_info.err_info.rx_id)); 1454 1455 /* Normalize the error bitmap value to an just an unsigned int */ 1456 err_warn_bit_map = (u64) 1457 ((u64)cqe->cqe_info.err_info.err_warn_bitmap_hi << 32) | 1458 (u64)cqe->cqe_info.err_info.err_warn_bitmap_lo; 1459 for (i = 0; i < 64; i++) { 1460 if (err_warn_bit_map & (u64)((u64)1 << i)) { 1461 err_warn = i; 1462 break; 1463 } 1464 } 1465 1466 /* Check if REC TOV expired if this is a tape device */ 1467 if (fcport->dev_type == QEDF_RPORT_TYPE_TAPE) { 1468 if (err_warn == 1469 FCOE_WARNING_CODE_REC_TOV_TIMER_EXPIRATION) { 1470 QEDF_ERR(&(qedf->dbg_ctx), "REC timer expired.\n"); 1471 if (!test_bit(QEDF_CMD_SRR_SENT, &io_req->flags)) { 1472 io_req->rx_buf_off = 1473 cqe->cqe_info.err_info.rx_buf_off; 1474 io_req->tx_buf_off = 1475 cqe->cqe_info.err_info.tx_buf_off; 1476 io_req->rx_id = cqe->cqe_info.err_info.rx_id; 1477 rval = qedf_send_rec(io_req); 1478 /* 1479 * We only want to abort the io_req if we 1480 * can't queue the REC command as we want to 1481 * keep the exchange open for recovery. 1482 */ 1483 if (rval) 1484 goto send_abort; 1485 } 1486 return; 1487 } 1488 } 1489 1490 send_abort: 1491 init_completion(&io_req->abts_done); 1492 rval = qedf_initiate_abts(io_req, true); 1493 if (rval) 1494 QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n"); 1495 } 1496 1497 /* Cleanup a command when we receive an error detection completion */ 1498 void qedf_process_error_detect(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1499 struct qedf_ioreq *io_req) 1500 { 1501 int rval; 1502 1503 if (io_req == NULL) { 1504 QEDF_INFO(NULL, QEDF_LOG_IO, "io_req is NULL.\n"); 1505 return; 1506 } 1507 1508 if (io_req->fcport == NULL) { 1509 QEDF_INFO(NULL, QEDF_LOG_IO, "fcport is NULL.\n"); 1510 return; 1511 } 1512 1513 if (!cqe) { 1514 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1515 "cqe is NULL for io_req %p\n", io_req); 1516 return; 1517 } 1518 1519 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "Error detection CQE, " 1520 "xid=0x%x\n", io_req->xid); 1521 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), 1522 "err_warn_bitmap=%08x:%08x\n", 1523 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_hi), 1524 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_lo)); 1525 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "tx_buff_off=%08x, " 1526 "rx_buff_off=%08x, rx_id=%04x\n", 1527 le32_to_cpu(cqe->cqe_info.err_info.tx_buf_off), 1528 le32_to_cpu(cqe->cqe_info.err_info.rx_buf_off), 1529 le32_to_cpu(cqe->cqe_info.err_info.rx_id)); 1530 1531 /* When flush is active, let the cmds be flushed out from the cleanup context */ 1532 if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &io_req->fcport->flags) || 1533 (test_bit(QEDF_RPORT_IN_LUN_RESET, &io_req->fcport->flags) && 1534 io_req->sc_cmd->device->lun == (u64)io_req->fcport->lun_reset_lun)) { 1535 QEDF_ERR(&qedf->dbg_ctx, 1536 "Dropping EQE for xid=0x%x as fcport is flushing", 1537 io_req->xid); 1538 return; 1539 } 1540 1541 if (qedf->stop_io_on_error) { 1542 qedf_stop_all_io(qedf); 1543 return; 1544 } 1545 1546 init_completion(&io_req->abts_done); 1547 rval = qedf_initiate_abts(io_req, true); 1548 if (rval) 1549 QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n"); 1550 } 1551 1552 static void qedf_flush_els_req(struct qedf_ctx *qedf, 1553 struct qedf_ioreq *els_req) 1554 { 1555 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1556 "Flushing ELS request xid=0x%x refcount=%d.\n", els_req->xid, 1557 kref_read(&els_req->refcount)); 1558 1559 /* 1560 * Need to distinguish this from a timeout when calling the 1561 * els_req->cb_func. 1562 */ 1563 els_req->event = QEDF_IOREQ_EV_ELS_FLUSH; 1564 1565 clear_bit(QEDF_CMD_OUTSTANDING, &els_req->flags); 1566 1567 /* Cancel the timer */ 1568 cancel_delayed_work_sync(&els_req->timeout_work); 1569 1570 /* Call callback function to complete command */ 1571 if (els_req->cb_func && els_req->cb_arg) { 1572 els_req->cb_func(els_req->cb_arg); 1573 els_req->cb_arg = NULL; 1574 } 1575 1576 /* Release kref for original initiate_els */ 1577 kref_put(&els_req->refcount, qedf_release_cmd); 1578 } 1579 1580 /* A value of -1 for lun is a wild card that means flush all 1581 * active SCSI I/Os for the target. 1582 */ 1583 void qedf_flush_active_ios(struct qedf_rport *fcport, int lun) 1584 { 1585 struct qedf_ioreq *io_req; 1586 struct qedf_ctx *qedf; 1587 struct qedf_cmd_mgr *cmd_mgr; 1588 int i, rc; 1589 unsigned long flags; 1590 int flush_cnt = 0; 1591 int wait_cnt = 100; 1592 int refcount = 0; 1593 1594 if (!fcport) { 1595 QEDF_ERR(NULL, "fcport is NULL\n"); 1596 return; 1597 } 1598 1599 /* Check that fcport is still offloaded */ 1600 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 1601 QEDF_ERR(NULL, "fcport is no longer offloaded.\n"); 1602 return; 1603 } 1604 1605 qedf = fcport->qedf; 1606 1607 if (!qedf) { 1608 QEDF_ERR(NULL, "qedf is NULL.\n"); 1609 return; 1610 } 1611 1612 /* Only wait for all commands to be queued in the Upload context */ 1613 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags) && 1614 (lun == -1)) { 1615 while (atomic_read(&fcport->ios_to_queue)) { 1616 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1617 "Waiting for %d I/Os to be queued\n", 1618 atomic_read(&fcport->ios_to_queue)); 1619 if (wait_cnt == 0) { 1620 QEDF_ERR(NULL, 1621 "%d IOs request could not be queued\n", 1622 atomic_read(&fcport->ios_to_queue)); 1623 } 1624 msleep(20); 1625 wait_cnt--; 1626 } 1627 } 1628 1629 cmd_mgr = qedf->cmd_mgr; 1630 1631 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1632 "Flush active i/o's num=0x%x fcport=0x%p port_id=0x%06x scsi_id=%d.\n", 1633 atomic_read(&fcport->num_active_ios), fcport, 1634 fcport->rdata->ids.port_id, fcport->rport->scsi_target_id); 1635 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Locking flush mutex.\n"); 1636 1637 mutex_lock(&qedf->flush_mutex); 1638 if (lun == -1) { 1639 set_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags); 1640 } else { 1641 set_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags); 1642 fcport->lun_reset_lun = lun; 1643 } 1644 1645 for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) { 1646 io_req = &cmd_mgr->cmds[i]; 1647 1648 if (!io_req) 1649 continue; 1650 if (!io_req->fcport) 1651 continue; 1652 1653 spin_lock_irqsave(&cmd_mgr->lock, flags); 1654 1655 if (io_req->alloc) { 1656 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags)) { 1657 if (io_req->cmd_type == QEDF_SCSI_CMD) 1658 QEDF_ERR(&qedf->dbg_ctx, 1659 "Allocated but not queued, xid=0x%x\n", 1660 io_req->xid); 1661 } 1662 spin_unlock_irqrestore(&cmd_mgr->lock, flags); 1663 } else { 1664 spin_unlock_irqrestore(&cmd_mgr->lock, flags); 1665 continue; 1666 } 1667 1668 if (io_req->fcport != fcport) 1669 continue; 1670 1671 /* In case of ABTS, CMD_OUTSTANDING is cleared on ABTS response, 1672 * but RRQ is still pending. 1673 * Workaround: Within qedf_send_rrq, we check if the fcport is 1674 * NULL, and we drop the ref on the io_req to clean it up. 1675 */ 1676 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags)) { 1677 refcount = kref_read(&io_req->refcount); 1678 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1679 "Not outstanding, xid=0x%x, cmd_type=%d refcount=%d.\n", 1680 io_req->xid, io_req->cmd_type, refcount); 1681 /* If RRQ work has been queue, try to cancel it and 1682 * free the io_req 1683 */ 1684 if (atomic_read(&io_req->state) == 1685 QEDFC_CMD_ST_RRQ_WAIT) { 1686 if (cancel_delayed_work_sync 1687 (&io_req->rrq_work)) { 1688 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1689 "Putting reference for pending RRQ work xid=0x%x.\n", 1690 io_req->xid); 1691 /* ID: 003 */ 1692 kref_put(&io_req->refcount, 1693 qedf_release_cmd); 1694 } 1695 } 1696 continue; 1697 } 1698 1699 /* Only consider flushing ELS during target reset */ 1700 if (io_req->cmd_type == QEDF_ELS && 1701 lun == -1) { 1702 rc = kref_get_unless_zero(&io_req->refcount); 1703 if (!rc) { 1704 QEDF_ERR(&(qedf->dbg_ctx), 1705 "Could not get kref for ELS io_req=0x%p xid=0x%x.\n", 1706 io_req, io_req->xid); 1707 continue; 1708 } 1709 qedf_initiate_cleanup(io_req, false); 1710 flush_cnt++; 1711 qedf_flush_els_req(qedf, io_req); 1712 1713 /* 1714 * Release the kref and go back to the top of the 1715 * loop. 1716 */ 1717 goto free_cmd; 1718 } 1719 1720 if (io_req->cmd_type == QEDF_ABTS) { 1721 /* ID: 004 */ 1722 rc = kref_get_unless_zero(&io_req->refcount); 1723 if (!rc) { 1724 QEDF_ERR(&(qedf->dbg_ctx), 1725 "Could not get kref for abort io_req=0x%p xid=0x%x.\n", 1726 io_req, io_req->xid); 1727 continue; 1728 } 1729 if (lun != -1 && io_req->lun != lun) 1730 goto free_cmd; 1731 1732 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1733 "Flushing abort xid=0x%x.\n", io_req->xid); 1734 1735 if (cancel_delayed_work_sync(&io_req->rrq_work)) { 1736 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1737 "Putting ref for cancelled RRQ work xid=0x%x.\n", 1738 io_req->xid); 1739 kref_put(&io_req->refcount, qedf_release_cmd); 1740 } 1741 1742 if (cancel_delayed_work_sync(&io_req->timeout_work)) { 1743 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1744 "Putting ref for cancelled tmo work xid=0x%x.\n", 1745 io_req->xid); 1746 qedf_initiate_cleanup(io_req, true); 1747 /* Notify eh_abort handler that ABTS is 1748 * complete 1749 */ 1750 complete(&io_req->abts_done); 1751 clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 1752 /* ID: 002 */ 1753 kref_put(&io_req->refcount, qedf_release_cmd); 1754 } 1755 flush_cnt++; 1756 goto free_cmd; 1757 } 1758 1759 if (!io_req->sc_cmd) 1760 continue; 1761 if (!io_req->sc_cmd->device) { 1762 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1763 "Device backpointer NULL for sc_cmd=%p.\n", 1764 io_req->sc_cmd); 1765 /* Put reference for non-existent scsi_cmnd */ 1766 io_req->sc_cmd = NULL; 1767 qedf_initiate_cleanup(io_req, false); 1768 kref_put(&io_req->refcount, qedf_release_cmd); 1769 continue; 1770 } 1771 if (lun > -1) { 1772 if (io_req->lun != lun) 1773 continue; 1774 } 1775 1776 /* 1777 * Use kref_get_unless_zero in the unlikely case the command 1778 * we're about to flush was completed in the normal SCSI path 1779 */ 1780 rc = kref_get_unless_zero(&io_req->refcount); 1781 if (!rc) { 1782 QEDF_ERR(&(qedf->dbg_ctx), "Could not get kref for " 1783 "io_req=0x%p xid=0x%x\n", io_req, io_req->xid); 1784 continue; 1785 } 1786 1787 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1788 "Cleanup xid=0x%x.\n", io_req->xid); 1789 flush_cnt++; 1790 1791 /* Cleanup task and return I/O mid-layer */ 1792 qedf_initiate_cleanup(io_req, true); 1793 1794 free_cmd: 1795 kref_put(&io_req->refcount, qedf_release_cmd); /* ID: 004 */ 1796 } 1797 1798 wait_cnt = 60; 1799 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1800 "Flushed 0x%x I/Os, active=0x%x.\n", 1801 flush_cnt, atomic_read(&fcport->num_active_ios)); 1802 /* Only wait for all commands to complete in the Upload context */ 1803 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags) && 1804 (lun == -1)) { 1805 while (atomic_read(&fcport->num_active_ios)) { 1806 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1807 "Flushed 0x%x I/Os, active=0x%x cnt=%d.\n", 1808 flush_cnt, 1809 atomic_read(&fcport->num_active_ios), 1810 wait_cnt); 1811 if (wait_cnt == 0) { 1812 QEDF_ERR(&qedf->dbg_ctx, 1813 "Flushed %d I/Os, active=%d.\n", 1814 flush_cnt, 1815 atomic_read(&fcport->num_active_ios)); 1816 for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) { 1817 io_req = &cmd_mgr->cmds[i]; 1818 if (io_req->fcport && 1819 io_req->fcport == fcport) { 1820 refcount = 1821 kref_read(&io_req->refcount); 1822 set_bit(QEDF_CMD_DIRTY, 1823 &io_req->flags); 1824 QEDF_ERR(&qedf->dbg_ctx, 1825 "Outstanding io_req =%p xid=0x%x flags=0x%lx, sc_cmd=%p refcount=%d cmd_type=%d.\n", 1826 io_req, io_req->xid, 1827 io_req->flags, 1828 io_req->sc_cmd, 1829 refcount, 1830 io_req->cmd_type); 1831 } 1832 } 1833 WARN_ON(1); 1834 break; 1835 } 1836 msleep(500); 1837 wait_cnt--; 1838 } 1839 } 1840 1841 clear_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags); 1842 clear_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags); 1843 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Unlocking flush mutex.\n"); 1844 mutex_unlock(&qedf->flush_mutex); 1845 } 1846 1847 /* 1848 * Initiate a ABTS middle path command. Note that we don't have to initialize 1849 * the task context for an ABTS task. 1850 */ 1851 int qedf_initiate_abts(struct qedf_ioreq *io_req, bool return_scsi_cmd_on_abts) 1852 { 1853 struct fc_lport *lport; 1854 struct qedf_rport *fcport = io_req->fcport; 1855 struct fc_rport_priv *rdata; 1856 struct qedf_ctx *qedf; 1857 u16 xid; 1858 int rc = 0; 1859 unsigned long flags; 1860 struct fcoe_wqe *sqe; 1861 u16 sqe_idx; 1862 int refcount = 0; 1863 1864 /* Sanity check qedf_rport before dereferencing any pointers */ 1865 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 1866 QEDF_ERR(NULL, "tgt not offloaded\n"); 1867 rc = 1; 1868 goto out; 1869 } 1870 1871 qedf = fcport->qedf; 1872 rdata = fcport->rdata; 1873 1874 if (!rdata || !kref_get_unless_zero(&rdata->kref)) { 1875 QEDF_ERR(&qedf->dbg_ctx, "stale rport\n"); 1876 rc = 1; 1877 goto out; 1878 } 1879 1880 lport = qedf->lport; 1881 1882 if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 1883 QEDF_ERR(&(qedf->dbg_ctx), "link is not ready\n"); 1884 rc = 1; 1885 goto drop_rdata_kref; 1886 } 1887 1888 if (atomic_read(&qedf->link_down_tmo_valid) > 0) { 1889 QEDF_ERR(&(qedf->dbg_ctx), "link_down_tmo active.\n"); 1890 rc = 1; 1891 goto drop_rdata_kref; 1892 } 1893 1894 /* Ensure room on SQ */ 1895 if (!atomic_read(&fcport->free_sqes)) { 1896 QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n"); 1897 rc = 1; 1898 goto drop_rdata_kref; 1899 } 1900 1901 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 1902 QEDF_ERR(&qedf->dbg_ctx, "fcport is uploading.\n"); 1903 rc = 1; 1904 goto drop_rdata_kref; 1905 } 1906 1907 spin_lock_irqsave(&fcport->rport_lock, flags); 1908 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || 1909 test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags) || 1910 test_bit(QEDF_CMD_IN_ABORT, &io_req->flags)) { 1911 QEDF_ERR(&qedf->dbg_ctx, 1912 "io_req xid=0x%x sc_cmd=%p already in cleanup or abort processing or already completed.\n", 1913 io_req->xid, io_req->sc_cmd); 1914 rc = 1; 1915 spin_unlock_irqrestore(&fcport->rport_lock, flags); 1916 goto drop_rdata_kref; 1917 } 1918 1919 /* Set the command type to abort */ 1920 io_req->cmd_type = QEDF_ABTS; 1921 spin_unlock_irqrestore(&fcport->rport_lock, flags); 1922 1923 kref_get(&io_req->refcount); 1924 1925 xid = io_req->xid; 1926 qedf->control_requests++; 1927 qedf->packet_aborts++; 1928 1929 io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts; 1930 1931 set_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 1932 refcount = kref_read(&io_req->refcount); 1933 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 1934 "ABTS io_req xid = 0x%x refcount=%d\n", 1935 xid, refcount); 1936 1937 qedf_cmd_timer_set(qedf, io_req, QEDF_ABORT_TIMEOUT); 1938 1939 spin_lock_irqsave(&fcport->rport_lock, flags); 1940 1941 sqe_idx = qedf_get_sqe_idx(fcport); 1942 sqe = &fcport->sq[sqe_idx]; 1943 memset(sqe, 0, sizeof(struct fcoe_wqe)); 1944 io_req->task_params->sqe = sqe; 1945 1946 init_initiator_abort_fcoe_task(io_req->task_params); 1947 qedf_ring_doorbell(fcport); 1948 1949 spin_unlock_irqrestore(&fcport->rport_lock, flags); 1950 1951 drop_rdata_kref: 1952 kref_put(&rdata->kref, fc_rport_destroy); 1953 out: 1954 return rc; 1955 } 1956 1957 void qedf_process_abts_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1958 struct qedf_ioreq *io_req) 1959 { 1960 uint32_t r_ctl; 1961 int rc; 1962 struct qedf_rport *fcport = io_req->fcport; 1963 1964 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "Entered with xid = " 1965 "0x%x cmd_type = %d\n", io_req->xid, io_req->cmd_type); 1966 1967 r_ctl = cqe->cqe_info.abts_info.r_ctl; 1968 1969 /* This was added at a point when we were scheduling abts_compl & 1970 * cleanup_compl on different CPUs and there was a possibility of 1971 * the io_req to be freed from the other context before we got here. 1972 */ 1973 if (!fcport) { 1974 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1975 "Dropping ABTS completion xid=0x%x as fcport is NULL", 1976 io_req->xid); 1977 return; 1978 } 1979 1980 /* 1981 * When flush is active, let the cmds be completed from the cleanup 1982 * context 1983 */ 1984 if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags) || 1985 test_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags)) { 1986 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1987 "Dropping ABTS completion xid=0x%x as fcport is flushing", 1988 io_req->xid); 1989 return; 1990 } 1991 1992 if (!cancel_delayed_work(&io_req->timeout_work)) { 1993 QEDF_ERR(&qedf->dbg_ctx, 1994 "Wasn't able to cancel abts timeout work.\n"); 1995 } 1996 1997 switch (r_ctl) { 1998 case FC_RCTL_BA_ACC: 1999 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, 2000 "ABTS response - ACC Send RRQ after R_A_TOV\n"); 2001 io_req->event = QEDF_IOREQ_EV_ABORT_SUCCESS; 2002 rc = kref_get_unless_zero(&io_req->refcount); /* ID: 003 */ 2003 if (!rc) { 2004 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 2005 "kref is already zero so ABTS was already completed or flushed xid=0x%x.\n", 2006 io_req->xid); 2007 return; 2008 } 2009 /* 2010 * Dont release this cmd yet. It will be relesed 2011 * after we get RRQ response 2012 */ 2013 queue_delayed_work(qedf->dpc_wq, &io_req->rrq_work, 2014 msecs_to_jiffies(qedf->lport->r_a_tov)); 2015 atomic_set(&io_req->state, QEDFC_CMD_ST_RRQ_WAIT); 2016 break; 2017 /* For error cases let the cleanup return the command */ 2018 case FC_RCTL_BA_RJT: 2019 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, 2020 "ABTS response - RJT\n"); 2021 io_req->event = QEDF_IOREQ_EV_ABORT_FAILED; 2022 break; 2023 default: 2024 QEDF_ERR(&(qedf->dbg_ctx), "Unknown ABTS response\n"); 2025 break; 2026 } 2027 2028 clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 2029 2030 if (io_req->sc_cmd) { 2031 if (!io_req->return_scsi_cmd_on_abts) 2032 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 2033 "Not call scsi_done for xid=0x%x.\n", 2034 io_req->xid); 2035 if (io_req->return_scsi_cmd_on_abts) 2036 qedf_scsi_done(qedf, io_req, DID_ERROR); 2037 } 2038 2039 /* Notify eh_abort handler that ABTS is complete */ 2040 complete(&io_req->abts_done); 2041 2042 kref_put(&io_req->refcount, qedf_release_cmd); 2043 } 2044 2045 int qedf_init_mp_req(struct qedf_ioreq *io_req) 2046 { 2047 struct qedf_mp_req *mp_req; 2048 struct scsi_sge *mp_req_bd; 2049 struct scsi_sge *mp_resp_bd; 2050 struct qedf_ctx *qedf = io_req->fcport->qedf; 2051 dma_addr_t addr; 2052 uint64_t sz; 2053 2054 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_MP_REQ, "Entered.\n"); 2055 2056 mp_req = (struct qedf_mp_req *)&(io_req->mp_req); 2057 memset(mp_req, 0, sizeof(struct qedf_mp_req)); 2058 2059 if (io_req->cmd_type != QEDF_ELS) { 2060 mp_req->req_len = sizeof(struct fcp_cmnd); 2061 io_req->data_xfer_len = mp_req->req_len; 2062 } else 2063 mp_req->req_len = io_req->data_xfer_len; 2064 2065 mp_req->req_buf = dma_alloc_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE, 2066 &mp_req->req_buf_dma, GFP_KERNEL); 2067 if (!mp_req->req_buf) { 2068 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP req buffer\n"); 2069 qedf_free_mp_resc(io_req); 2070 return -ENOMEM; 2071 } 2072 2073 mp_req->resp_buf = dma_alloc_coherent(&qedf->pdev->dev, 2074 QEDF_PAGE_SIZE, &mp_req->resp_buf_dma, GFP_KERNEL); 2075 if (!mp_req->resp_buf) { 2076 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc TM resp " 2077 "buffer\n"); 2078 qedf_free_mp_resc(io_req); 2079 return -ENOMEM; 2080 } 2081 2082 /* Allocate and map mp_req_bd and mp_resp_bd */ 2083 sz = sizeof(struct scsi_sge); 2084 mp_req->mp_req_bd = dma_alloc_coherent(&qedf->pdev->dev, sz, 2085 &mp_req->mp_req_bd_dma, GFP_KERNEL); 2086 if (!mp_req->mp_req_bd) { 2087 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP req bd\n"); 2088 qedf_free_mp_resc(io_req); 2089 return -ENOMEM; 2090 } 2091 2092 mp_req->mp_resp_bd = dma_alloc_coherent(&qedf->pdev->dev, sz, 2093 &mp_req->mp_resp_bd_dma, GFP_KERNEL); 2094 if (!mp_req->mp_resp_bd) { 2095 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP resp bd\n"); 2096 qedf_free_mp_resc(io_req); 2097 return -ENOMEM; 2098 } 2099 2100 /* Fill bd table */ 2101 addr = mp_req->req_buf_dma; 2102 mp_req_bd = mp_req->mp_req_bd; 2103 mp_req_bd->sge_addr.lo = U64_LO(addr); 2104 mp_req_bd->sge_addr.hi = U64_HI(addr); 2105 mp_req_bd->sge_len = QEDF_PAGE_SIZE; 2106 2107 /* 2108 * MP buffer is either a task mgmt command or an ELS. 2109 * So the assumption is that it consumes a single bd 2110 * entry in the bd table 2111 */ 2112 mp_resp_bd = mp_req->mp_resp_bd; 2113 addr = mp_req->resp_buf_dma; 2114 mp_resp_bd->sge_addr.lo = U64_LO(addr); 2115 mp_resp_bd->sge_addr.hi = U64_HI(addr); 2116 mp_resp_bd->sge_len = QEDF_PAGE_SIZE; 2117 2118 return 0; 2119 } 2120 2121 /* 2122 * Last ditch effort to clear the port if it's stuck. Used only after a 2123 * cleanup task times out. 2124 */ 2125 static void qedf_drain_request(struct qedf_ctx *qedf) 2126 { 2127 if (test_bit(QEDF_DRAIN_ACTIVE, &qedf->flags)) { 2128 QEDF_ERR(&(qedf->dbg_ctx), "MCP drain already active.\n"); 2129 return; 2130 } 2131 2132 /* Set bit to return all queuecommand requests as busy */ 2133 set_bit(QEDF_DRAIN_ACTIVE, &qedf->flags); 2134 2135 /* Call qed drain request for function. Should be synchronous */ 2136 qed_ops->common->drain(qedf->cdev); 2137 2138 /* Settle time for CQEs to be returned */ 2139 msleep(100); 2140 2141 /* Unplug and continue */ 2142 clear_bit(QEDF_DRAIN_ACTIVE, &qedf->flags); 2143 } 2144 2145 /* 2146 * Returns SUCCESS if the cleanup task does not timeout, otherwise return 2147 * FAILURE. 2148 */ 2149 int qedf_initiate_cleanup(struct qedf_ioreq *io_req, 2150 bool return_scsi_cmd_on_abts) 2151 { 2152 struct qedf_rport *fcport; 2153 struct qedf_ctx *qedf; 2154 int tmo = 0; 2155 int rc = SUCCESS; 2156 unsigned long flags; 2157 struct fcoe_wqe *sqe; 2158 u16 sqe_idx; 2159 int refcount = 0; 2160 2161 fcport = io_req->fcport; 2162 if (!fcport) { 2163 QEDF_ERR(NULL, "fcport is NULL.\n"); 2164 return SUCCESS; 2165 } 2166 2167 /* Sanity check qedf_rport before dereferencing any pointers */ 2168 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 2169 QEDF_ERR(NULL, "tgt not offloaded\n"); 2170 return SUCCESS; 2171 } 2172 2173 qedf = fcport->qedf; 2174 if (!qedf) { 2175 QEDF_ERR(NULL, "qedf is NULL.\n"); 2176 return SUCCESS; 2177 } 2178 2179 if (io_req->cmd_type == QEDF_ELS) { 2180 goto process_els; 2181 } 2182 2183 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || 2184 test_and_set_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags)) { 2185 QEDF_ERR(&(qedf->dbg_ctx), "io_req xid=0x%x already in " 2186 "cleanup processing or already completed.\n", 2187 io_req->xid); 2188 return SUCCESS; 2189 } 2190 set_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2191 2192 process_els: 2193 /* Ensure room on SQ */ 2194 if (!atomic_read(&fcport->free_sqes)) { 2195 QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n"); 2196 /* Need to make sure we clear the flag since it was set */ 2197 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2198 return FAILED; 2199 } 2200 2201 if (io_req->cmd_type == QEDF_CLEANUP) { 2202 QEDF_ERR(&qedf->dbg_ctx, 2203 "io_req=0x%x is already a cleanup command cmd_type=%d.\n", 2204 io_req->xid, io_req->cmd_type); 2205 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2206 return SUCCESS; 2207 } 2208 2209 refcount = kref_read(&io_req->refcount); 2210 2211 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 2212 "Entered xid=0x%x sc_cmd=%p cmd_type=%d flags=0x%lx refcount=%d fcport=%p port_id=0x%06x\n", 2213 io_req->xid, io_req->sc_cmd, io_req->cmd_type, io_req->flags, 2214 refcount, fcport, fcport->rdata->ids.port_id); 2215 2216 /* Cleanup cmds re-use the same TID as the original I/O */ 2217 spin_lock_irqsave(&fcport->rport_lock, flags); 2218 io_req->cmd_type = QEDF_CLEANUP; 2219 spin_unlock_irqrestore(&fcport->rport_lock, flags); 2220 io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts; 2221 2222 init_completion(&io_req->cleanup_done); 2223 2224 spin_lock_irqsave(&fcport->rport_lock, flags); 2225 2226 sqe_idx = qedf_get_sqe_idx(fcport); 2227 sqe = &fcport->sq[sqe_idx]; 2228 memset(sqe, 0, sizeof(struct fcoe_wqe)); 2229 io_req->task_params->sqe = sqe; 2230 2231 init_initiator_cleanup_fcoe_task(io_req->task_params); 2232 qedf_ring_doorbell(fcport); 2233 2234 spin_unlock_irqrestore(&fcport->rport_lock, flags); 2235 2236 tmo = wait_for_completion_timeout(&io_req->cleanup_done, 2237 QEDF_CLEANUP_TIMEOUT * HZ); 2238 2239 if (!tmo) { 2240 rc = FAILED; 2241 /* Timeout case */ 2242 QEDF_ERR(&(qedf->dbg_ctx), "Cleanup command timeout, " 2243 "xid=%x.\n", io_req->xid); 2244 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2245 /* Issue a drain request if cleanup task times out */ 2246 QEDF_ERR(&(qedf->dbg_ctx), "Issuing MCP drain request.\n"); 2247 qedf_drain_request(qedf); 2248 } 2249 2250 /* If it TASK MGMT handle it, reference will be decreased 2251 * in qedf_execute_tmf 2252 */ 2253 if (io_req->tm_flags == FCP_TMF_LUN_RESET || 2254 io_req->tm_flags == FCP_TMF_TGT_RESET) { 2255 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2256 io_req->sc_cmd = NULL; 2257 kref_put(&io_req->refcount, qedf_release_cmd); 2258 complete(&io_req->tm_done); 2259 } 2260 2261 if (io_req->sc_cmd) { 2262 if (!io_req->return_scsi_cmd_on_abts) 2263 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 2264 "Not call scsi_done for xid=0x%x.\n", 2265 io_req->xid); 2266 if (io_req->return_scsi_cmd_on_abts) 2267 qedf_scsi_done(qedf, io_req, DID_ERROR); 2268 } 2269 2270 if (rc == SUCCESS) 2271 io_req->event = QEDF_IOREQ_EV_CLEANUP_SUCCESS; 2272 else 2273 io_req->event = QEDF_IOREQ_EV_CLEANUP_FAILED; 2274 2275 return rc; 2276 } 2277 2278 void qedf_process_cleanup_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 2279 struct qedf_ioreq *io_req) 2280 { 2281 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "Entered xid = 0x%x\n", 2282 io_req->xid); 2283 2284 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2285 2286 /* Complete so we can finish cleaning up the I/O */ 2287 complete(&io_req->cleanup_done); 2288 } 2289 2290 static int qedf_execute_tmf(struct qedf_rport *fcport, struct scsi_cmnd *sc_cmd, 2291 uint8_t tm_flags) 2292 { 2293 struct qedf_ioreq *io_req; 2294 struct fcoe_task_context *task; 2295 struct qedf_ctx *qedf = fcport->qedf; 2296 struct fc_lport *lport = qedf->lport; 2297 int rc = 0; 2298 uint16_t xid; 2299 int tmo = 0; 2300 int lun = 0; 2301 unsigned long flags; 2302 struct fcoe_wqe *sqe; 2303 u16 sqe_idx; 2304 2305 if (!sc_cmd) { 2306 QEDF_ERR(&qedf->dbg_ctx, "sc_cmd is NULL\n"); 2307 return FAILED; 2308 } 2309 2310 lun = (int)sc_cmd->device->lun; 2311 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 2312 QEDF_ERR(&(qedf->dbg_ctx), "fcport not offloaded\n"); 2313 rc = FAILED; 2314 goto no_flush; 2315 } 2316 2317 io_req = qedf_alloc_cmd(fcport, QEDF_TASK_MGMT_CMD); 2318 if (!io_req) { 2319 QEDF_ERR(&(qedf->dbg_ctx), "Failed TMF"); 2320 rc = -EAGAIN; 2321 goto no_flush; 2322 } 2323 2324 if (tm_flags == FCP_TMF_LUN_RESET) 2325 qedf->lun_resets++; 2326 else if (tm_flags == FCP_TMF_TGT_RESET) 2327 qedf->target_resets++; 2328 2329 /* Initialize rest of io_req fields */ 2330 io_req->sc_cmd = sc_cmd; 2331 io_req->fcport = fcport; 2332 io_req->cmd_type = QEDF_TASK_MGMT_CMD; 2333 2334 /* Record which cpu this request is associated with */ 2335 io_req->cpu = smp_processor_id(); 2336 2337 /* Set TM flags */ 2338 io_req->io_req_flags = QEDF_READ; 2339 io_req->data_xfer_len = 0; 2340 io_req->tm_flags = tm_flags; 2341 2342 /* Default is to return a SCSI command when an error occurs */ 2343 io_req->return_scsi_cmd_on_abts = false; 2344 2345 /* Obtain exchange id */ 2346 xid = io_req->xid; 2347 2348 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "TMF io_req xid = " 2349 "0x%x\n", xid); 2350 2351 /* Initialize task context for this IO request */ 2352 task = qedf_get_task_mem(&qedf->tasks, xid); 2353 2354 init_completion(&io_req->tm_done); 2355 2356 spin_lock_irqsave(&fcport->rport_lock, flags); 2357 2358 sqe_idx = qedf_get_sqe_idx(fcport); 2359 sqe = &fcport->sq[sqe_idx]; 2360 memset(sqe, 0, sizeof(struct fcoe_wqe)); 2361 2362 qedf_init_task(fcport, lport, io_req, task, sqe); 2363 qedf_ring_doorbell(fcport); 2364 2365 spin_unlock_irqrestore(&fcport->rport_lock, flags); 2366 2367 set_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2368 tmo = wait_for_completion_timeout(&io_req->tm_done, 2369 QEDF_TM_TIMEOUT * HZ); 2370 2371 if (!tmo) { 2372 rc = FAILED; 2373 QEDF_ERR(&(qedf->dbg_ctx), "wait for tm_cmpl timeout!\n"); 2374 /* Clear outstanding bit since command timed out */ 2375 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2376 io_req->sc_cmd = NULL; 2377 } else { 2378 /* Check TMF response code */ 2379 if (io_req->fcp_rsp_code == 0) 2380 rc = SUCCESS; 2381 else 2382 rc = FAILED; 2383 } 2384 /* 2385 * Double check that fcport has not gone into an uploading state before 2386 * executing the command flush for the LUN/target. 2387 */ 2388 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 2389 QEDF_ERR(&qedf->dbg_ctx, 2390 "fcport is uploading, not executing flush.\n"); 2391 goto no_flush; 2392 } 2393 /* We do not need this io_req any more */ 2394 kref_put(&io_req->refcount, qedf_release_cmd); 2395 2396 2397 if (tm_flags == FCP_TMF_LUN_RESET) 2398 qedf_flush_active_ios(fcport, lun); 2399 else 2400 qedf_flush_active_ios(fcport, -1); 2401 2402 no_flush: 2403 if (rc != SUCCESS) { 2404 QEDF_ERR(&(qedf->dbg_ctx), "task mgmt command failed...\n"); 2405 rc = FAILED; 2406 } else { 2407 QEDF_ERR(&(qedf->dbg_ctx), "task mgmt command success...\n"); 2408 rc = SUCCESS; 2409 } 2410 return rc; 2411 } 2412 2413 int qedf_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags) 2414 { 2415 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 2416 struct fc_rport_libfc_priv *rp = rport->dd_data; 2417 struct qedf_rport *fcport = (struct qedf_rport *)&rp[1]; 2418 struct qedf_ctx *qedf; 2419 struct fc_lport *lport = shost_priv(sc_cmd->device->host); 2420 int rc = SUCCESS; 2421 int rval; 2422 struct qedf_ioreq *io_req = NULL; 2423 int ref_cnt = 0; 2424 struct fc_rport_priv *rdata = fcport->rdata; 2425 2426 QEDF_ERR(NULL, 2427 "tm_flags 0x%x sc_cmd %p op = 0x%02x target_id = 0x%x lun=%d\n", 2428 tm_flags, sc_cmd, sc_cmd->cmd_len ? sc_cmd->cmnd[0] : 0xff, 2429 rport->scsi_target_id, (int)sc_cmd->device->lun); 2430 2431 if (!rdata || !kref_get_unless_zero(&rdata->kref)) { 2432 QEDF_ERR(NULL, "stale rport\n"); 2433 return FAILED; 2434 } 2435 2436 QEDF_ERR(NULL, "portid=%06x tm_flags =%s\n", rdata->ids.port_id, 2437 (tm_flags == FCP_TMF_TGT_RESET) ? "TARGET RESET" : 2438 "LUN RESET"); 2439 2440 if (qedf_priv(sc_cmd)->io_req) { 2441 io_req = qedf_priv(sc_cmd)->io_req; 2442 ref_cnt = kref_read(&io_req->refcount); 2443 QEDF_ERR(NULL, 2444 "orig io_req = %p xid = 0x%x ref_cnt = %d.\n", 2445 io_req, io_req->xid, ref_cnt); 2446 } 2447 2448 rval = fc_remote_port_chkready(rport); 2449 if (rval) { 2450 QEDF_ERR(NULL, "device_reset rport not ready\n"); 2451 rc = FAILED; 2452 goto tmf_err; 2453 } 2454 2455 rc = fc_block_scsi_eh(sc_cmd); 2456 if (rc) 2457 goto tmf_err; 2458 2459 if (!fcport) { 2460 QEDF_ERR(NULL, "device_reset: rport is NULL\n"); 2461 rc = FAILED; 2462 goto tmf_err; 2463 } 2464 2465 qedf = fcport->qedf; 2466 2467 if (!qedf) { 2468 QEDF_ERR(NULL, "qedf is NULL.\n"); 2469 rc = FAILED; 2470 goto tmf_err; 2471 } 2472 2473 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 2474 QEDF_ERR(&qedf->dbg_ctx, "Connection is getting uploaded.\n"); 2475 rc = SUCCESS; 2476 goto tmf_err; 2477 } 2478 2479 if (test_bit(QEDF_UNLOADING, &qedf->flags) || 2480 test_bit(QEDF_DBG_STOP_IO, &qedf->flags)) { 2481 rc = SUCCESS; 2482 goto tmf_err; 2483 } 2484 2485 if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 2486 QEDF_ERR(&(qedf->dbg_ctx), "link is not ready\n"); 2487 rc = FAILED; 2488 goto tmf_err; 2489 } 2490 2491 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 2492 if (!fcport->rdata) 2493 QEDF_ERR(&qedf->dbg_ctx, "fcport %p is uploading.\n", 2494 fcport); 2495 else 2496 QEDF_ERR(&qedf->dbg_ctx, 2497 "fcport %p port_id=%06x is uploading.\n", 2498 fcport, fcport->rdata->ids.port_id); 2499 rc = FAILED; 2500 goto tmf_err; 2501 } 2502 2503 rc = qedf_execute_tmf(fcport, sc_cmd, tm_flags); 2504 2505 tmf_err: 2506 kref_put(&rdata->kref, fc_rport_destroy); 2507 return rc; 2508 } 2509 2510 void qedf_process_tmf_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 2511 struct qedf_ioreq *io_req) 2512 { 2513 struct fcoe_cqe_rsp_info *fcp_rsp; 2514 2515 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2516 2517 fcp_rsp = &cqe->cqe_info.rsp_info; 2518 qedf_parse_fcp_rsp(io_req, fcp_rsp); 2519 2520 io_req->sc_cmd = NULL; 2521 complete(&io_req->tm_done); 2522 } 2523 2524 void qedf_process_unsol_compl(struct qedf_ctx *qedf, uint16_t que_idx, 2525 struct fcoe_cqe *cqe) 2526 { 2527 unsigned long flags; 2528 uint16_t pktlen = cqe->cqe_info.unsolic_info.pkt_len; 2529 u32 payload_len, crc; 2530 struct fc_frame_header *fh; 2531 struct fc_frame *fp; 2532 struct qedf_io_work *io_work; 2533 u32 bdq_idx; 2534 void *bdq_addr; 2535 struct scsi_bd *p_bd_info; 2536 2537 p_bd_info = &cqe->cqe_info.unsolic_info.bd_info; 2538 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL, 2539 "address.hi=%x, address.lo=%x, opaque_data.hi=%x, opaque_data.lo=%x, bdq_prod_idx=%u, len=%u\n", 2540 le32_to_cpu(p_bd_info->address.hi), 2541 le32_to_cpu(p_bd_info->address.lo), 2542 le32_to_cpu(p_bd_info->opaque.fcoe_opaque.hi), 2543 le32_to_cpu(p_bd_info->opaque.fcoe_opaque.lo), 2544 qedf->bdq_prod_idx, pktlen); 2545 2546 bdq_idx = le32_to_cpu(p_bd_info->opaque.fcoe_opaque.lo); 2547 if (bdq_idx >= QEDF_BDQ_SIZE) { 2548 QEDF_ERR(&(qedf->dbg_ctx), "bdq_idx is out of range %d.\n", 2549 bdq_idx); 2550 goto increment_prod; 2551 } 2552 2553 bdq_addr = qedf->bdq[bdq_idx].buf_addr; 2554 if (!bdq_addr) { 2555 QEDF_ERR(&(qedf->dbg_ctx), "bdq_addr is NULL, dropping " 2556 "unsolicited packet.\n"); 2557 goto increment_prod; 2558 } 2559 2560 if (qedf_dump_frames) { 2561 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL, 2562 "BDQ frame is at addr=%p.\n", bdq_addr); 2563 print_hex_dump(KERN_WARNING, "bdq ", DUMP_PREFIX_OFFSET, 16, 1, 2564 (void *)bdq_addr, pktlen, false); 2565 } 2566 2567 /* Allocate frame */ 2568 payload_len = pktlen - sizeof(struct fc_frame_header); 2569 fp = fc_frame_alloc(qedf->lport, payload_len); 2570 if (!fp) { 2571 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate fp.\n"); 2572 goto increment_prod; 2573 } 2574 2575 /* Copy data from BDQ buffer into fc_frame struct */ 2576 fh = (struct fc_frame_header *)fc_frame_header_get(fp); 2577 memcpy(fh, (void *)bdq_addr, pktlen); 2578 2579 QEDF_WARN(&qedf->dbg_ctx, 2580 "Processing Unsolicated frame, src=%06x dest=%06x r_ctl=0x%x type=0x%x cmd=%02x\n", 2581 ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl, 2582 fh->fh_type, fc_frame_payload_op(fp)); 2583 2584 /* Initialize the frame so libfc sees it as a valid frame */ 2585 crc = fcoe_fc_crc(fp); 2586 fc_frame_init(fp); 2587 fr_dev(fp) = qedf->lport; 2588 fr_sof(fp) = FC_SOF_I3; 2589 fr_eof(fp) = FC_EOF_T; 2590 fr_crc(fp) = cpu_to_le32(~crc); 2591 2592 /* 2593 * We need to return the frame back up to libfc in a non-atomic 2594 * context 2595 */ 2596 io_work = mempool_alloc(qedf->io_mempool, GFP_ATOMIC); 2597 if (!io_work) { 2598 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate " 2599 "work for I/O completion.\n"); 2600 fc_frame_free(fp); 2601 goto increment_prod; 2602 } 2603 memset(io_work, 0, sizeof(struct qedf_io_work)); 2604 2605 INIT_WORK(&io_work->work, qedf_fp_io_handler); 2606 2607 /* Copy contents of CQE for deferred processing */ 2608 memcpy(&io_work->cqe, cqe, sizeof(struct fcoe_cqe)); 2609 2610 io_work->qedf = qedf; 2611 io_work->fp = fp; 2612 2613 queue_work_on(smp_processor_id(), qedf_io_wq, &io_work->work); 2614 increment_prod: 2615 spin_lock_irqsave(&qedf->hba_lock, flags); 2616 2617 /* Increment producer to let f/w know we've handled the frame */ 2618 qedf->bdq_prod_idx++; 2619 2620 /* Producer index wraps at uint16_t boundary */ 2621 if (qedf->bdq_prod_idx == 0xffff) 2622 qedf->bdq_prod_idx = 0; 2623 2624 writew(qedf->bdq_prod_idx, qedf->bdq_primary_prod); 2625 readw(qedf->bdq_primary_prod); 2626 writew(qedf->bdq_prod_idx, qedf->bdq_secondary_prod); 2627 readw(qedf->bdq_secondary_prod); 2628 2629 spin_unlock_irqrestore(&qedf->hba_lock, flags); 2630 } 2631