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 u8 op = 0; 26 27 if (io_req == NULL) { 28 QEDF_INFO(NULL, QEDF_LOG_IO, "io_req is NULL.\n"); 29 return; 30 } 31 32 fcport = io_req->fcport; 33 if (io_req->fcport == NULL) { 34 QEDF_INFO(NULL, QEDF_LOG_IO, "fcport is NULL.\n"); 35 return; 36 } 37 38 qedf = fcport->qedf; 39 40 switch (io_req->cmd_type) { 41 case QEDF_ABTS: 42 if (qedf == NULL) { 43 QEDF_INFO(NULL, QEDF_LOG_IO, 44 "qedf is NULL for ABTS xid=0x%x.\n", 45 io_req->xid); 46 return; 47 } 48 49 QEDF_ERR((&qedf->dbg_ctx), "ABTS timeout, xid=0x%x.\n", 50 io_req->xid); 51 /* Cleanup timed out ABTS */ 52 qedf_initiate_cleanup(io_req, true); 53 complete(&io_req->abts_done); 54 55 /* 56 * Need to call kref_put for reference taken when initiate_abts 57 * was called since abts_compl won't be called now that we've 58 * cleaned up the task. 59 */ 60 kref_put(&io_req->refcount, qedf_release_cmd); 61 62 /* Clear in abort bit now that we're done with the command */ 63 clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 64 65 /* 66 * Now that the original I/O and the ABTS are complete see 67 * if we need to reconnect to the target. 68 */ 69 qedf_restart_rport(fcport); 70 break; 71 case QEDF_ELS: 72 if (!qedf) { 73 QEDF_INFO(NULL, QEDF_LOG_IO, 74 "qedf is NULL for ELS xid=0x%x.\n", 75 io_req->xid); 76 return; 77 } 78 /* ELS request no longer outstanding since it timed out */ 79 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 80 81 kref_get(&io_req->refcount); 82 /* 83 * Don't attempt to clean an ELS timeout as any subseqeunt 84 * ABTS or cleanup requests just hang. For now just free 85 * the resources of the original I/O and the RRQ 86 */ 87 QEDF_ERR(&(qedf->dbg_ctx), "ELS timeout, xid=0x%x.\n", 88 io_req->xid); 89 io_req->event = QEDF_IOREQ_EV_ELS_TMO; 90 /* Call callback function to complete command */ 91 if (io_req->cb_func && io_req->cb_arg) { 92 op = io_req->cb_arg->op; 93 io_req->cb_func(io_req->cb_arg); 94 io_req->cb_arg = NULL; 95 } 96 qedf_initiate_cleanup(io_req, true); 97 kref_put(&io_req->refcount, qedf_release_cmd); 98 break; 99 case QEDF_SEQ_CLEANUP: 100 QEDF_ERR(&(qedf->dbg_ctx), "Sequence cleanup timeout, " 101 "xid=0x%x.\n", io_req->xid); 102 qedf_initiate_cleanup(io_req, true); 103 io_req->event = QEDF_IOREQ_EV_ELS_TMO; 104 qedf_process_seq_cleanup_compl(qedf, NULL, io_req); 105 break; 106 default: 107 break; 108 } 109 } 110 111 void qedf_cmd_mgr_free(struct qedf_cmd_mgr *cmgr) 112 { 113 struct io_bdt *bdt_info; 114 struct qedf_ctx *qedf = cmgr->qedf; 115 size_t bd_tbl_sz; 116 u16 min_xid = 0; 117 u16 max_xid = (FCOE_PARAMS_NUM_TASKS - 1); 118 int num_ios; 119 int i; 120 struct qedf_ioreq *io_req; 121 122 num_ios = max_xid - min_xid + 1; 123 124 /* Free fcoe_bdt_ctx structures */ 125 if (!cmgr->io_bdt_pool) 126 goto free_cmd_pool; 127 128 bd_tbl_sz = QEDF_MAX_BDS_PER_CMD * sizeof(struct scsi_sge); 129 for (i = 0; i < num_ios; i++) { 130 bdt_info = cmgr->io_bdt_pool[i]; 131 if (bdt_info->bd_tbl) { 132 dma_free_coherent(&qedf->pdev->dev, bd_tbl_sz, 133 bdt_info->bd_tbl, bdt_info->bd_tbl_dma); 134 bdt_info->bd_tbl = NULL; 135 } 136 } 137 138 /* Destroy io_bdt pool */ 139 for (i = 0; i < num_ios; i++) { 140 kfree(cmgr->io_bdt_pool[i]); 141 cmgr->io_bdt_pool[i] = NULL; 142 } 143 144 kfree(cmgr->io_bdt_pool); 145 cmgr->io_bdt_pool = NULL; 146 147 free_cmd_pool: 148 149 for (i = 0; i < num_ios; i++) { 150 io_req = &cmgr->cmds[i]; 151 kfree(io_req->sgl_task_params); 152 kfree(io_req->task_params); 153 /* Make sure we free per command sense buffer */ 154 if (io_req->sense_buffer) 155 dma_free_coherent(&qedf->pdev->dev, 156 QEDF_SCSI_SENSE_BUFFERSIZE, io_req->sense_buffer, 157 io_req->sense_buffer_dma); 158 cancel_delayed_work_sync(&io_req->rrq_work); 159 } 160 161 /* Free command manager itself */ 162 vfree(cmgr); 163 } 164 165 static void qedf_handle_rrq(struct work_struct *work) 166 { 167 struct qedf_ioreq *io_req = 168 container_of(work, struct qedf_ioreq, rrq_work.work); 169 170 atomic_set(&io_req->state, QEDFC_CMD_ST_RRQ_ACTIVE); 171 qedf_send_rrq(io_req); 172 173 } 174 175 struct qedf_cmd_mgr *qedf_cmd_mgr_alloc(struct qedf_ctx *qedf) 176 { 177 struct qedf_cmd_mgr *cmgr; 178 struct io_bdt *bdt_info; 179 struct qedf_ioreq *io_req; 180 u16 xid; 181 int i; 182 int num_ios; 183 u16 min_xid = 0; 184 u16 max_xid = (FCOE_PARAMS_NUM_TASKS - 1); 185 186 /* Make sure num_queues is already set before calling this function */ 187 if (!qedf->num_queues) { 188 QEDF_ERR(&(qedf->dbg_ctx), "num_queues is not set.\n"); 189 return NULL; 190 } 191 192 if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) { 193 QEDF_WARN(&(qedf->dbg_ctx), "Invalid min_xid 0x%x and " 194 "max_xid 0x%x.\n", min_xid, max_xid); 195 return NULL; 196 } 197 198 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "min xid 0x%x, max xid " 199 "0x%x.\n", min_xid, max_xid); 200 201 num_ios = max_xid - min_xid + 1; 202 203 cmgr = vzalloc(sizeof(struct qedf_cmd_mgr)); 204 if (!cmgr) { 205 QEDF_WARN(&(qedf->dbg_ctx), "Failed to alloc cmd mgr.\n"); 206 return NULL; 207 } 208 209 cmgr->qedf = qedf; 210 spin_lock_init(&cmgr->lock); 211 212 /* 213 * Initialize I/O request fields. 214 */ 215 xid = 0; 216 217 for (i = 0; i < num_ios; i++) { 218 io_req = &cmgr->cmds[i]; 219 INIT_DELAYED_WORK(&io_req->timeout_work, qedf_cmd_timeout); 220 221 io_req->xid = xid++; 222 223 INIT_DELAYED_WORK(&io_req->rrq_work, qedf_handle_rrq); 224 225 /* Allocate DMA memory to hold sense buffer */ 226 io_req->sense_buffer = dma_alloc_coherent(&qedf->pdev->dev, 227 QEDF_SCSI_SENSE_BUFFERSIZE, &io_req->sense_buffer_dma, 228 GFP_KERNEL); 229 if (!io_req->sense_buffer) 230 goto mem_err; 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 WARN_ON(io_req->sc_cmd); 442 443 if (io_req->cmd_type == QEDF_ELS || 444 io_req->cmd_type == QEDF_TASK_MGMT_CMD) 445 qedf_free_mp_resc(io_req); 446 447 atomic_inc(&cmd_mgr->free_list_cnt); 448 atomic_dec(&fcport->num_active_ios); 449 atomic_set(&io_req->state, QEDF_CMD_ST_INACTIVE); 450 if (atomic_read(&fcport->num_active_ios) < 0) 451 QEDF_WARN(&(fcport->qedf->dbg_ctx), "active_ios < 0.\n"); 452 453 /* Increment task retry identifier now that the request is released */ 454 io_req->task_retry_identifier++; 455 io_req->fcport = NULL; 456 457 clear_bit(QEDF_CMD_DIRTY, &io_req->flags); 458 io_req->cpu = 0; 459 spin_lock_irqsave(&cmd_mgr->lock, flags); 460 io_req->fcport = NULL; 461 io_req->alloc = 0; 462 spin_unlock_irqrestore(&cmd_mgr->lock, flags); 463 } 464 465 static int qedf_map_sg(struct qedf_ioreq *io_req) 466 { 467 struct scsi_cmnd *sc = io_req->sc_cmd; 468 struct Scsi_Host *host = sc->device->host; 469 struct fc_lport *lport = shost_priv(host); 470 struct qedf_ctx *qedf = lport_priv(lport); 471 struct scsi_sge *bd = io_req->bd_tbl->bd_tbl; 472 struct scatterlist *sg; 473 int byte_count = 0; 474 int sg_count = 0; 475 int bd_count = 0; 476 u32 sg_len; 477 u64 addr, end_addr; 478 int i = 0; 479 480 sg_count = dma_map_sg(&qedf->pdev->dev, scsi_sglist(sc), 481 scsi_sg_count(sc), sc->sc_data_direction); 482 sg = scsi_sglist(sc); 483 484 io_req->sge_type = QEDF_IOREQ_UNKNOWN_SGE; 485 486 if (sg_count <= 8 || io_req->io_req_flags == QEDF_READ) 487 io_req->sge_type = QEDF_IOREQ_FAST_SGE; 488 489 scsi_for_each_sg(sc, sg, sg_count, i) { 490 sg_len = (u32)sg_dma_len(sg); 491 addr = (u64)sg_dma_address(sg); 492 end_addr = (u64)(addr + sg_len); 493 494 /* 495 * Intermediate s/g element so check if start and end address 496 * is page aligned. Only required for writes and only if the 497 * number of scatter/gather elements is 8 or more. 498 */ 499 if (io_req->sge_type == QEDF_IOREQ_UNKNOWN_SGE && (i) && 500 (i != (sg_count - 1)) && sg_len < QEDF_PAGE_SIZE) 501 io_req->sge_type = QEDF_IOREQ_SLOW_SGE; 502 503 bd[bd_count].sge_addr.lo = cpu_to_le32(U64_LO(addr)); 504 bd[bd_count].sge_addr.hi = cpu_to_le32(U64_HI(addr)); 505 bd[bd_count].sge_len = cpu_to_le32(sg_len); 506 507 bd_count++; 508 byte_count += sg_len; 509 } 510 511 /* To catch a case where FAST and SLOW nothing is set, set FAST */ 512 if (io_req->sge_type == QEDF_IOREQ_UNKNOWN_SGE) 513 io_req->sge_type = QEDF_IOREQ_FAST_SGE; 514 515 if (byte_count != scsi_bufflen(sc)) 516 QEDF_ERR(&(qedf->dbg_ctx), "byte_count = %d != " 517 "scsi_bufflen = %d, task_id = 0x%x.\n", byte_count, 518 scsi_bufflen(sc), io_req->xid); 519 520 return bd_count; 521 } 522 523 static int qedf_build_bd_list_from_sg(struct qedf_ioreq *io_req) 524 { 525 struct scsi_cmnd *sc = io_req->sc_cmd; 526 struct scsi_sge *bd = io_req->bd_tbl->bd_tbl; 527 int bd_count; 528 529 if (scsi_sg_count(sc)) { 530 bd_count = qedf_map_sg(io_req); 531 if (bd_count == 0) 532 return -ENOMEM; 533 } else { 534 bd_count = 0; 535 bd[0].sge_addr.lo = bd[0].sge_addr.hi = 0; 536 bd[0].sge_len = 0; 537 } 538 io_req->bd_tbl->bd_valid = bd_count; 539 540 return 0; 541 } 542 543 static void qedf_build_fcp_cmnd(struct qedf_ioreq *io_req, 544 struct fcp_cmnd *fcp_cmnd) 545 { 546 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 547 548 /* fcp_cmnd is 32 bytes */ 549 memset(fcp_cmnd, 0, FCP_CMND_LEN); 550 551 /* 8 bytes: SCSI LUN info */ 552 int_to_scsilun(sc_cmd->device->lun, 553 (struct scsi_lun *)&fcp_cmnd->fc_lun); 554 555 /* 4 bytes: flag info */ 556 fcp_cmnd->fc_pri_ta = 0; 557 fcp_cmnd->fc_tm_flags = io_req->tm_flags; 558 fcp_cmnd->fc_flags = io_req->io_req_flags; 559 fcp_cmnd->fc_cmdref = 0; 560 561 /* Populate data direction */ 562 if (io_req->cmd_type == QEDF_TASK_MGMT_CMD) { 563 fcp_cmnd->fc_flags |= FCP_CFL_RDDATA; 564 } else { 565 if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) 566 fcp_cmnd->fc_flags |= FCP_CFL_WRDATA; 567 else if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) 568 fcp_cmnd->fc_flags |= FCP_CFL_RDDATA; 569 } 570 571 fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE; 572 573 /* 16 bytes: CDB information */ 574 if (io_req->cmd_type != QEDF_TASK_MGMT_CMD) 575 memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len); 576 577 /* 4 bytes: FCP data length */ 578 fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len); 579 } 580 581 static void qedf_init_task(struct qedf_rport *fcport, struct fc_lport *lport, 582 struct qedf_ioreq *io_req, struct e4_fcoe_task_context *task_ctx, 583 struct fcoe_wqe *sqe) 584 { 585 enum fcoe_task_type task_type; 586 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 587 struct io_bdt *bd_tbl = io_req->bd_tbl; 588 u8 fcp_cmnd[32]; 589 u32 tmp_fcp_cmnd[8]; 590 int bd_count = 0; 591 struct qedf_ctx *qedf = fcport->qedf; 592 uint16_t cq_idx = smp_processor_id() % qedf->num_queues; 593 struct regpair sense_data_buffer_phys_addr; 594 u32 tx_io_size = 0; 595 u32 rx_io_size = 0; 596 int i, cnt; 597 598 /* Note init_initiator_rw_fcoe_task memsets the task context */ 599 io_req->task = task_ctx; 600 memset(task_ctx, 0, sizeof(struct e4_fcoe_task_context)); 601 memset(io_req->task_params, 0, sizeof(struct fcoe_task_params)); 602 memset(io_req->sgl_task_params, 0, sizeof(struct scsi_sgl_task_params)); 603 604 /* Set task type bassed on DMA directio of command */ 605 if (io_req->cmd_type == QEDF_TASK_MGMT_CMD) { 606 task_type = FCOE_TASK_TYPE_READ_INITIATOR; 607 } else { 608 if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { 609 task_type = FCOE_TASK_TYPE_WRITE_INITIATOR; 610 tx_io_size = io_req->data_xfer_len; 611 } else { 612 task_type = FCOE_TASK_TYPE_READ_INITIATOR; 613 rx_io_size = io_req->data_xfer_len; 614 } 615 } 616 617 /* Setup the fields for fcoe_task_params */ 618 io_req->task_params->context = task_ctx; 619 io_req->task_params->sqe = sqe; 620 io_req->task_params->task_type = task_type; 621 io_req->task_params->tx_io_size = tx_io_size; 622 io_req->task_params->rx_io_size = rx_io_size; 623 io_req->task_params->conn_cid = fcport->fw_cid; 624 io_req->task_params->itid = io_req->xid; 625 io_req->task_params->cq_rss_number = cq_idx; 626 io_req->task_params->is_tape_device = fcport->dev_type; 627 628 /* Fill in information for scatter/gather list */ 629 if (io_req->cmd_type != QEDF_TASK_MGMT_CMD) { 630 bd_count = bd_tbl->bd_valid; 631 io_req->sgl_task_params->sgl = bd_tbl->bd_tbl; 632 io_req->sgl_task_params->sgl_phys_addr.lo = 633 U64_LO(bd_tbl->bd_tbl_dma); 634 io_req->sgl_task_params->sgl_phys_addr.hi = 635 U64_HI(bd_tbl->bd_tbl_dma); 636 io_req->sgl_task_params->num_sges = bd_count; 637 io_req->sgl_task_params->total_buffer_size = 638 scsi_bufflen(io_req->sc_cmd); 639 if (io_req->sge_type == QEDF_IOREQ_SLOW_SGE) 640 io_req->sgl_task_params->small_mid_sge = 1; 641 else 642 io_req->sgl_task_params->small_mid_sge = 0; 643 } 644 645 /* Fill in physical address of sense buffer */ 646 sense_data_buffer_phys_addr.lo = U64_LO(io_req->sense_buffer_dma); 647 sense_data_buffer_phys_addr.hi = U64_HI(io_req->sense_buffer_dma); 648 649 /* fill FCP_CMND IU */ 650 qedf_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tmp_fcp_cmnd); 651 652 /* Swap fcp_cmnd since FC is big endian */ 653 cnt = sizeof(struct fcp_cmnd) / sizeof(u32); 654 for (i = 0; i < cnt; i++) { 655 tmp_fcp_cmnd[i] = cpu_to_be32(tmp_fcp_cmnd[i]); 656 } 657 memcpy(fcp_cmnd, tmp_fcp_cmnd, sizeof(struct fcp_cmnd)); 658 659 init_initiator_rw_fcoe_task(io_req->task_params, 660 io_req->sgl_task_params, 661 sense_data_buffer_phys_addr, 662 io_req->task_retry_identifier, fcp_cmnd); 663 664 /* Increment SGL type counters */ 665 if (io_req->sge_type == QEDF_IOREQ_SLOW_SGE) 666 qedf->slow_sge_ios++; 667 else 668 qedf->fast_sge_ios++; 669 } 670 671 void qedf_init_mp_task(struct qedf_ioreq *io_req, 672 struct e4_fcoe_task_context *task_ctx, struct fcoe_wqe *sqe) 673 { 674 struct qedf_mp_req *mp_req = &(io_req->mp_req); 675 struct qedf_rport *fcport = io_req->fcport; 676 struct qedf_ctx *qedf = io_req->fcport->qedf; 677 struct fc_frame_header *fc_hdr; 678 struct fcoe_tx_mid_path_params task_fc_hdr; 679 struct scsi_sgl_task_params tx_sgl_task_params; 680 struct scsi_sgl_task_params rx_sgl_task_params; 681 682 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, 683 "Initializing MP task for cmd_type=%d\n", 684 io_req->cmd_type); 685 686 qedf->control_requests++; 687 688 memset(&tx_sgl_task_params, 0, sizeof(struct scsi_sgl_task_params)); 689 memset(&rx_sgl_task_params, 0, sizeof(struct scsi_sgl_task_params)); 690 memset(task_ctx, 0, sizeof(struct e4_fcoe_task_context)); 691 memset(&task_fc_hdr, 0, sizeof(struct fcoe_tx_mid_path_params)); 692 693 /* Setup the task from io_req for easy reference */ 694 io_req->task = task_ctx; 695 696 /* Setup the fields for fcoe_task_params */ 697 io_req->task_params->context = task_ctx; 698 io_req->task_params->sqe = sqe; 699 io_req->task_params->task_type = FCOE_TASK_TYPE_MIDPATH; 700 io_req->task_params->tx_io_size = io_req->data_xfer_len; 701 /* rx_io_size tells the f/w how large a response buffer we have */ 702 io_req->task_params->rx_io_size = PAGE_SIZE; 703 io_req->task_params->conn_cid = fcport->fw_cid; 704 io_req->task_params->itid = io_req->xid; 705 /* Return middle path commands on CQ 0 */ 706 io_req->task_params->cq_rss_number = 0; 707 io_req->task_params->is_tape_device = fcport->dev_type; 708 709 fc_hdr = &(mp_req->req_fc_hdr); 710 /* Set OX_ID and RX_ID based on driver task id */ 711 fc_hdr->fh_ox_id = io_req->xid; 712 fc_hdr->fh_rx_id = htons(0xffff); 713 714 /* Set up FC header information */ 715 task_fc_hdr.parameter = fc_hdr->fh_parm_offset; 716 task_fc_hdr.r_ctl = fc_hdr->fh_r_ctl; 717 task_fc_hdr.type = fc_hdr->fh_type; 718 task_fc_hdr.cs_ctl = fc_hdr->fh_cs_ctl; 719 task_fc_hdr.df_ctl = fc_hdr->fh_df_ctl; 720 task_fc_hdr.rx_id = fc_hdr->fh_rx_id; 721 task_fc_hdr.ox_id = fc_hdr->fh_ox_id; 722 723 /* Set up s/g list parameters for request buffer */ 724 tx_sgl_task_params.sgl = mp_req->mp_req_bd; 725 tx_sgl_task_params.sgl_phys_addr.lo = U64_LO(mp_req->mp_req_bd_dma); 726 tx_sgl_task_params.sgl_phys_addr.hi = U64_HI(mp_req->mp_req_bd_dma); 727 tx_sgl_task_params.num_sges = 1; 728 /* Set PAGE_SIZE for now since sg element is that size ??? */ 729 tx_sgl_task_params.total_buffer_size = io_req->data_xfer_len; 730 tx_sgl_task_params.small_mid_sge = 0; 731 732 /* Set up s/g list parameters for request buffer */ 733 rx_sgl_task_params.sgl = mp_req->mp_resp_bd; 734 rx_sgl_task_params.sgl_phys_addr.lo = U64_LO(mp_req->mp_resp_bd_dma); 735 rx_sgl_task_params.sgl_phys_addr.hi = U64_HI(mp_req->mp_resp_bd_dma); 736 rx_sgl_task_params.num_sges = 1; 737 /* Set PAGE_SIZE for now since sg element is that size ??? */ 738 rx_sgl_task_params.total_buffer_size = PAGE_SIZE; 739 rx_sgl_task_params.small_mid_sge = 0; 740 741 742 /* 743 * Last arg is 0 as previous code did not set that we wanted the 744 * fc header information. 745 */ 746 init_initiator_midpath_unsolicited_fcoe_task(io_req->task_params, 747 &task_fc_hdr, 748 &tx_sgl_task_params, 749 &rx_sgl_task_params, 0); 750 } 751 752 /* Presumed that fcport->rport_lock is held */ 753 u16 qedf_get_sqe_idx(struct qedf_rport *fcport) 754 { 755 uint16_t total_sqe = (fcport->sq_mem_size)/(sizeof(struct fcoe_wqe)); 756 u16 rval; 757 758 rval = fcport->sq_prod_idx; 759 760 /* Adjust ring index */ 761 fcport->sq_prod_idx++; 762 fcport->fw_sq_prod_idx++; 763 if (fcport->sq_prod_idx == total_sqe) 764 fcport->sq_prod_idx = 0; 765 766 return rval; 767 } 768 769 void qedf_ring_doorbell(struct qedf_rport *fcport) 770 { 771 struct fcoe_db_data dbell = { 0 }; 772 773 dbell.agg_flags = 0; 774 775 dbell.params |= DB_DEST_XCM << FCOE_DB_DATA_DEST_SHIFT; 776 dbell.params |= DB_AGG_CMD_SET << FCOE_DB_DATA_AGG_CMD_SHIFT; 777 dbell.params |= DQ_XCM_FCOE_SQ_PROD_CMD << 778 FCOE_DB_DATA_AGG_VAL_SEL_SHIFT; 779 780 dbell.sq_prod = fcport->fw_sq_prod_idx; 781 /* wmb makes sure that the BDs data is updated before updating the 782 * producer, otherwise FW may read old data from the BDs. 783 */ 784 wmb(); 785 barrier(); 786 writel(*(u32 *)&dbell, fcport->p_doorbell); 787 /* 788 * Fence required to flush the write combined buffer, since another 789 * CPU may write to the same doorbell address and data may be lost 790 * due to relaxed order nature of write combined bar. 791 */ 792 wmb(); 793 } 794 795 static void qedf_trace_io(struct qedf_rport *fcport, struct qedf_ioreq *io_req, 796 int8_t direction) 797 { 798 struct qedf_ctx *qedf = fcport->qedf; 799 struct qedf_io_log *io_log; 800 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 801 unsigned long flags; 802 uint8_t op; 803 804 spin_lock_irqsave(&qedf->io_trace_lock, flags); 805 806 io_log = &qedf->io_trace_buf[qedf->io_trace_idx]; 807 io_log->direction = direction; 808 io_log->task_id = io_req->xid; 809 io_log->port_id = fcport->rdata->ids.port_id; 810 io_log->lun = sc_cmd->device->lun; 811 io_log->op = op = sc_cmd->cmnd[0]; 812 io_log->lba[0] = sc_cmd->cmnd[2]; 813 io_log->lba[1] = sc_cmd->cmnd[3]; 814 io_log->lba[2] = sc_cmd->cmnd[4]; 815 io_log->lba[3] = sc_cmd->cmnd[5]; 816 io_log->bufflen = scsi_bufflen(sc_cmd); 817 io_log->sg_count = scsi_sg_count(sc_cmd); 818 io_log->result = sc_cmd->result; 819 io_log->jiffies = jiffies; 820 io_log->refcount = kref_read(&io_req->refcount); 821 822 if (direction == QEDF_IO_TRACE_REQ) { 823 /* For requests we only care abot the submission CPU */ 824 io_log->req_cpu = io_req->cpu; 825 io_log->int_cpu = 0; 826 io_log->rsp_cpu = 0; 827 } else if (direction == QEDF_IO_TRACE_RSP) { 828 io_log->req_cpu = io_req->cpu; 829 io_log->int_cpu = io_req->int_cpu; 830 io_log->rsp_cpu = smp_processor_id(); 831 } 832 833 io_log->sge_type = io_req->sge_type; 834 835 qedf->io_trace_idx++; 836 if (qedf->io_trace_idx == QEDF_IO_TRACE_SIZE) 837 qedf->io_trace_idx = 0; 838 839 spin_unlock_irqrestore(&qedf->io_trace_lock, flags); 840 } 841 842 int qedf_post_io_req(struct qedf_rport *fcport, struct qedf_ioreq *io_req) 843 { 844 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 845 struct Scsi_Host *host = sc_cmd->device->host; 846 struct fc_lport *lport = shost_priv(host); 847 struct qedf_ctx *qedf = lport_priv(lport); 848 struct e4_fcoe_task_context *task_ctx; 849 u16 xid; 850 enum fcoe_task_type req_type = 0; 851 struct fcoe_wqe *sqe; 852 u16 sqe_idx; 853 854 /* Initialize rest of io_req fileds */ 855 io_req->data_xfer_len = scsi_bufflen(sc_cmd); 856 sc_cmd->SCp.ptr = (char *)io_req; 857 io_req->sge_type = QEDF_IOREQ_FAST_SGE; /* Assume fast SGL by default */ 858 859 /* Record which cpu this request is associated with */ 860 io_req->cpu = smp_processor_id(); 861 862 if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) { 863 req_type = FCOE_TASK_TYPE_READ_INITIATOR; 864 io_req->io_req_flags = QEDF_READ; 865 qedf->input_requests++; 866 } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { 867 req_type = FCOE_TASK_TYPE_WRITE_INITIATOR; 868 io_req->io_req_flags = QEDF_WRITE; 869 qedf->output_requests++; 870 } else { 871 io_req->io_req_flags = 0; 872 qedf->control_requests++; 873 } 874 875 xid = io_req->xid; 876 877 /* Build buffer descriptor list for firmware from sg list */ 878 if (qedf_build_bd_list_from_sg(io_req)) { 879 QEDF_ERR(&(qedf->dbg_ctx), "BD list creation failed.\n"); 880 /* Release cmd will release io_req, but sc_cmd is assigned */ 881 io_req->sc_cmd = NULL; 882 kref_put(&io_req->refcount, qedf_release_cmd); 883 return -EAGAIN; 884 } 885 886 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) || 887 test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 888 QEDF_ERR(&(qedf->dbg_ctx), "Session not offloaded yet.\n"); 889 /* Release cmd will release io_req, but sc_cmd is assigned */ 890 io_req->sc_cmd = NULL; 891 kref_put(&io_req->refcount, qedf_release_cmd); 892 return -EINVAL; 893 } 894 895 /* Record LUN number for later use if we neeed them */ 896 io_req->lun = (int)sc_cmd->device->lun; 897 898 /* Obtain free SQE */ 899 sqe_idx = qedf_get_sqe_idx(fcport); 900 sqe = &fcport->sq[sqe_idx]; 901 memset(sqe, 0, sizeof(struct fcoe_wqe)); 902 903 /* Get the task context */ 904 task_ctx = qedf_get_task_mem(&qedf->tasks, xid); 905 if (!task_ctx) { 906 QEDF_WARN(&(qedf->dbg_ctx), "task_ctx is NULL, xid=%d.\n", 907 xid); 908 /* Release cmd will release io_req, but sc_cmd is assigned */ 909 io_req->sc_cmd = NULL; 910 kref_put(&io_req->refcount, qedf_release_cmd); 911 return -EINVAL; 912 } 913 914 qedf_init_task(fcport, lport, io_req, task_ctx, sqe); 915 916 /* Ring doorbell */ 917 qedf_ring_doorbell(fcport); 918 919 /* Set that command is with the firmware now */ 920 set_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 921 922 if (qedf_io_tracing && io_req->sc_cmd) 923 qedf_trace_io(fcport, io_req, QEDF_IO_TRACE_REQ); 924 925 return false; 926 } 927 928 int 929 qedf_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc_cmd) 930 { 931 struct fc_lport *lport = shost_priv(host); 932 struct qedf_ctx *qedf = lport_priv(lport); 933 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 934 struct fc_rport_libfc_priv *rp = rport->dd_data; 935 struct qedf_rport *fcport; 936 struct qedf_ioreq *io_req; 937 int rc = 0; 938 int rval; 939 unsigned long flags = 0; 940 int num_sgs = 0; 941 942 num_sgs = scsi_sg_count(sc_cmd); 943 if (scsi_sg_count(sc_cmd) > QEDF_MAX_BDS_PER_CMD) { 944 QEDF_ERR(&qedf->dbg_ctx, 945 "Number of SG elements %d exceeds what hardware limitation of %d.\n", 946 num_sgs, QEDF_MAX_BDS_PER_CMD); 947 sc_cmd->result = DID_ERROR; 948 sc_cmd->scsi_done(sc_cmd); 949 return 0; 950 } 951 952 if (test_bit(QEDF_UNLOADING, &qedf->flags) || 953 test_bit(QEDF_DBG_STOP_IO, &qedf->flags)) { 954 sc_cmd->result = DID_NO_CONNECT << 16; 955 sc_cmd->scsi_done(sc_cmd); 956 return 0; 957 } 958 959 if (!qedf->pdev->msix_enabled) { 960 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 961 "Completing sc_cmd=%p DID_NO_CONNECT as MSI-X is not enabled.\n", 962 sc_cmd); 963 sc_cmd->result = DID_NO_CONNECT << 16; 964 sc_cmd->scsi_done(sc_cmd); 965 return 0; 966 } 967 968 rval = fc_remote_port_chkready(rport); 969 if (rval) { 970 sc_cmd->result = rval; 971 sc_cmd->scsi_done(sc_cmd); 972 return 0; 973 } 974 975 /* Retry command if we are doing a qed drain operation */ 976 if (test_bit(QEDF_DRAIN_ACTIVE, &qedf->flags)) { 977 rc = SCSI_MLQUEUE_HOST_BUSY; 978 goto exit_qcmd; 979 } 980 981 if (lport->state != LPORT_ST_READY || 982 atomic_read(&qedf->link_state) != QEDF_LINK_UP) { 983 rc = SCSI_MLQUEUE_HOST_BUSY; 984 goto exit_qcmd; 985 } 986 987 /* rport and tgt are allocated together, so tgt should be non-NULL */ 988 fcport = (struct qedf_rport *)&rp[1]; 989 990 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) || 991 test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 992 /* 993 * Session is not offloaded yet. Let SCSI-ml retry 994 * the command. 995 */ 996 rc = SCSI_MLQUEUE_TARGET_BUSY; 997 goto exit_qcmd; 998 } 999 1000 atomic_inc(&fcport->ios_to_queue); 1001 1002 if (fcport->retry_delay_timestamp) { 1003 if (time_after(jiffies, fcport->retry_delay_timestamp)) { 1004 fcport->retry_delay_timestamp = 0; 1005 } else { 1006 /* If retry_delay timer is active, flow off the ML */ 1007 rc = SCSI_MLQUEUE_TARGET_BUSY; 1008 atomic_dec(&fcport->ios_to_queue); 1009 goto exit_qcmd; 1010 } 1011 } 1012 1013 io_req = qedf_alloc_cmd(fcport, QEDF_SCSI_CMD); 1014 if (!io_req) { 1015 rc = SCSI_MLQUEUE_HOST_BUSY; 1016 atomic_dec(&fcport->ios_to_queue); 1017 goto exit_qcmd; 1018 } 1019 1020 io_req->sc_cmd = sc_cmd; 1021 1022 /* Take fcport->rport_lock for posting to fcport send queue */ 1023 spin_lock_irqsave(&fcport->rport_lock, flags); 1024 if (qedf_post_io_req(fcport, io_req)) { 1025 QEDF_WARN(&(qedf->dbg_ctx), "Unable to post io_req\n"); 1026 /* Return SQE to pool */ 1027 atomic_inc(&fcport->free_sqes); 1028 rc = SCSI_MLQUEUE_HOST_BUSY; 1029 } 1030 spin_unlock_irqrestore(&fcport->rport_lock, flags); 1031 atomic_dec(&fcport->ios_to_queue); 1032 1033 exit_qcmd: 1034 return rc; 1035 } 1036 1037 static void qedf_parse_fcp_rsp(struct qedf_ioreq *io_req, 1038 struct fcoe_cqe_rsp_info *fcp_rsp) 1039 { 1040 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1041 struct qedf_ctx *qedf = io_req->fcport->qedf; 1042 u8 rsp_flags = fcp_rsp->rsp_flags.flags; 1043 int fcp_sns_len = 0; 1044 int fcp_rsp_len = 0; 1045 uint8_t *rsp_info, *sense_data; 1046 1047 io_req->fcp_status = FC_GOOD; 1048 io_req->fcp_resid = 0; 1049 if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER | 1050 FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER)) 1051 io_req->fcp_resid = fcp_rsp->fcp_resid; 1052 1053 io_req->scsi_comp_flags = rsp_flags; 1054 CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status = 1055 fcp_rsp->scsi_status_code; 1056 1057 if (rsp_flags & 1058 FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) 1059 fcp_rsp_len = fcp_rsp->fcp_rsp_len; 1060 1061 if (rsp_flags & 1062 FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) 1063 fcp_sns_len = fcp_rsp->fcp_sns_len; 1064 1065 io_req->fcp_rsp_len = fcp_rsp_len; 1066 io_req->fcp_sns_len = fcp_sns_len; 1067 rsp_info = sense_data = io_req->sense_buffer; 1068 1069 /* fetch fcp_rsp_code */ 1070 if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) { 1071 /* Only for task management function */ 1072 io_req->fcp_rsp_code = rsp_info[3]; 1073 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1074 "fcp_rsp_code = %d\n", io_req->fcp_rsp_code); 1075 /* Adjust sense-data location. */ 1076 sense_data += fcp_rsp_len; 1077 } 1078 1079 if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) { 1080 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1081 "Truncating sense buffer\n"); 1082 fcp_sns_len = SCSI_SENSE_BUFFERSIZE; 1083 } 1084 1085 /* The sense buffer can be NULL for TMF commands */ 1086 if (sc_cmd->sense_buffer) { 1087 memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1088 if (fcp_sns_len) 1089 memcpy(sc_cmd->sense_buffer, sense_data, 1090 fcp_sns_len); 1091 } 1092 } 1093 1094 static void qedf_unmap_sg_list(struct qedf_ctx *qedf, struct qedf_ioreq *io_req) 1095 { 1096 struct scsi_cmnd *sc = io_req->sc_cmd; 1097 1098 if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) { 1099 dma_unmap_sg(&qedf->pdev->dev, scsi_sglist(sc), 1100 scsi_sg_count(sc), sc->sc_data_direction); 1101 io_req->bd_tbl->bd_valid = 0; 1102 } 1103 } 1104 1105 void qedf_scsi_completion(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1106 struct qedf_ioreq *io_req) 1107 { 1108 u16 xid; 1109 struct e4_fcoe_task_context *task_ctx; 1110 struct scsi_cmnd *sc_cmd; 1111 struct fcoe_cqe_rsp_info *fcp_rsp; 1112 struct qedf_rport *fcport; 1113 int refcount; 1114 u16 scope, qualifier = 0; 1115 u8 fw_residual_flag = 0; 1116 1117 if (!io_req) 1118 return; 1119 if (!cqe) 1120 return; 1121 1122 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || 1123 test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags) || 1124 test_bit(QEDF_CMD_IN_ABORT, &io_req->flags)) { 1125 QEDF_ERR(&qedf->dbg_ctx, 1126 "io_req xid=0x%x already in cleanup or abort processing or already completed.\n", 1127 io_req->xid); 1128 return; 1129 } 1130 1131 xid = io_req->xid; 1132 task_ctx = qedf_get_task_mem(&qedf->tasks, xid); 1133 sc_cmd = io_req->sc_cmd; 1134 fcp_rsp = &cqe->cqe_info.rsp_info; 1135 1136 if (!sc_cmd) { 1137 QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd is NULL!\n"); 1138 return; 1139 } 1140 1141 if (!sc_cmd->SCp.ptr) { 1142 QEDF_WARN(&(qedf->dbg_ctx), "SCp.ptr is NULL, returned in " 1143 "another context.\n"); 1144 return; 1145 } 1146 1147 if (!sc_cmd->device) { 1148 QEDF_ERR(&qedf->dbg_ctx, 1149 "Device for sc_cmd %p is NULL.\n", sc_cmd); 1150 return; 1151 } 1152 1153 if (!sc_cmd->request) { 1154 QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd->request is NULL, " 1155 "sc_cmd=%p.\n", sc_cmd); 1156 return; 1157 } 1158 1159 if (!sc_cmd->request->q) { 1160 QEDF_WARN(&(qedf->dbg_ctx), "request->q is NULL so request " 1161 "is not valid, sc_cmd=%p.\n", sc_cmd); 1162 return; 1163 } 1164 1165 fcport = io_req->fcport; 1166 1167 /* 1168 * When flush is active, let the cmds be completed from the cleanup 1169 * context 1170 */ 1171 if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags) || 1172 (test_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags) && 1173 sc_cmd->device->lun == (u64)fcport->lun_reset_lun)) { 1174 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1175 "Dropping good completion xid=0x%x as fcport is flushing", 1176 io_req->xid); 1177 return; 1178 } 1179 1180 qedf_parse_fcp_rsp(io_req, fcp_rsp); 1181 1182 qedf_unmap_sg_list(qedf, io_req); 1183 1184 /* Check for FCP transport error */ 1185 if (io_req->fcp_rsp_len > 3 && io_req->fcp_rsp_code) { 1186 QEDF_ERR(&(qedf->dbg_ctx), 1187 "FCP I/O protocol failure xid=0x%x fcp_rsp_len=%d " 1188 "fcp_rsp_code=%d.\n", io_req->xid, io_req->fcp_rsp_len, 1189 io_req->fcp_rsp_code); 1190 sc_cmd->result = DID_BUS_BUSY << 16; 1191 goto out; 1192 } 1193 1194 fw_residual_flag = GET_FIELD(cqe->cqe_info.rsp_info.fw_error_flags, 1195 FCOE_CQE_RSP_INFO_FW_UNDERRUN); 1196 if (fw_residual_flag) { 1197 QEDF_ERR(&qedf->dbg_ctx, 1198 "Firmware detected underrun: xid=0x%x fcp_rsp.flags=0x%02x fcp_resid=%d fw_residual=0x%x lba=%02x%02x%02x%02x.\n", 1199 io_req->xid, fcp_rsp->rsp_flags.flags, 1200 io_req->fcp_resid, 1201 cqe->cqe_info.rsp_info.fw_residual, sc_cmd->cmnd[2], 1202 sc_cmd->cmnd[3], sc_cmd->cmnd[4], sc_cmd->cmnd[5]); 1203 1204 if (io_req->cdb_status == 0) 1205 sc_cmd->result = (DID_ERROR << 16) | io_req->cdb_status; 1206 else 1207 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1208 1209 /* 1210 * Set resid to the whole buffer length so we won't try to resue 1211 * any previously data. 1212 */ 1213 scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); 1214 goto out; 1215 } 1216 1217 switch (io_req->fcp_status) { 1218 case FC_GOOD: 1219 if (io_req->cdb_status == 0) { 1220 /* Good I/O completion */ 1221 sc_cmd->result = DID_OK << 16; 1222 } else { 1223 refcount = kref_read(&io_req->refcount); 1224 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1225 "%d:0:%d:%lld xid=0x%0x op=0x%02x " 1226 "lba=%02x%02x%02x%02x cdb_status=%d " 1227 "fcp_resid=0x%x refcount=%d.\n", 1228 qedf->lport->host->host_no, sc_cmd->device->id, 1229 sc_cmd->device->lun, io_req->xid, 1230 sc_cmd->cmnd[0], sc_cmd->cmnd[2], sc_cmd->cmnd[3], 1231 sc_cmd->cmnd[4], sc_cmd->cmnd[5], 1232 io_req->cdb_status, io_req->fcp_resid, 1233 refcount); 1234 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1235 1236 if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL || 1237 io_req->cdb_status == SAM_STAT_BUSY) { 1238 /* 1239 * Check whether we need to set retry_delay at 1240 * all based on retry_delay module parameter 1241 * and the status qualifier. 1242 */ 1243 1244 /* Upper 2 bits */ 1245 scope = fcp_rsp->retry_delay_timer & 0xC000; 1246 /* Lower 14 bits */ 1247 qualifier = fcp_rsp->retry_delay_timer & 0x3FFF; 1248 1249 if (qedf_retry_delay && 1250 scope > 0 && qualifier > 0 && 1251 qualifier <= 0x3FEF) { 1252 /* Check we don't go over the max */ 1253 if (qualifier > QEDF_RETRY_DELAY_MAX) 1254 qualifier = 1255 QEDF_RETRY_DELAY_MAX; 1256 fcport->retry_delay_timestamp = 1257 jiffies + (qualifier * HZ / 10); 1258 } 1259 /* Record stats */ 1260 if (io_req->cdb_status == 1261 SAM_STAT_TASK_SET_FULL) 1262 qedf->task_set_fulls++; 1263 else 1264 qedf->busy++; 1265 } 1266 } 1267 if (io_req->fcp_resid) 1268 scsi_set_resid(sc_cmd, io_req->fcp_resid); 1269 break; 1270 default: 1271 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "fcp_status=%d.\n", 1272 io_req->fcp_status); 1273 break; 1274 } 1275 1276 out: 1277 if (qedf_io_tracing) 1278 qedf_trace_io(fcport, io_req, QEDF_IO_TRACE_RSP); 1279 1280 /* 1281 * We wait till the end of the function to clear the 1282 * outstanding bit in case we need to send an abort 1283 */ 1284 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 1285 1286 io_req->sc_cmd = NULL; 1287 sc_cmd->SCp.ptr = NULL; 1288 sc_cmd->scsi_done(sc_cmd); 1289 kref_put(&io_req->refcount, qedf_release_cmd); 1290 } 1291 1292 /* Return a SCSI command in some other context besides a normal completion */ 1293 void qedf_scsi_done(struct qedf_ctx *qedf, struct qedf_ioreq *io_req, 1294 int result) 1295 { 1296 u16 xid; 1297 struct scsi_cmnd *sc_cmd; 1298 int refcount; 1299 1300 if (!io_req) 1301 return; 1302 1303 if (test_and_set_bit(QEDF_CMD_ERR_SCSI_DONE, &io_req->flags)) { 1304 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1305 "io_req:%p scsi_done handling already done\n", 1306 io_req); 1307 return; 1308 } 1309 1310 /* 1311 * We will be done with this command after this call so clear the 1312 * outstanding bit. 1313 */ 1314 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 1315 1316 xid = io_req->xid; 1317 sc_cmd = io_req->sc_cmd; 1318 1319 if (!sc_cmd) { 1320 QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd is NULL!\n"); 1321 return; 1322 } 1323 1324 if (!virt_addr_valid(sc_cmd)) { 1325 QEDF_ERR(&qedf->dbg_ctx, "sc_cmd=%p is not valid.", sc_cmd); 1326 goto bad_scsi_ptr; 1327 } 1328 1329 if (!sc_cmd->SCp.ptr) { 1330 QEDF_WARN(&(qedf->dbg_ctx), "SCp.ptr is NULL, returned in " 1331 "another context.\n"); 1332 return; 1333 } 1334 1335 if (!sc_cmd->device) { 1336 QEDF_ERR(&qedf->dbg_ctx, "Device for sc_cmd %p is NULL.\n", 1337 sc_cmd); 1338 goto bad_scsi_ptr; 1339 } 1340 1341 if (!virt_addr_valid(sc_cmd->device)) { 1342 QEDF_ERR(&qedf->dbg_ctx, 1343 "Device pointer for sc_cmd %p is bad.\n", sc_cmd); 1344 goto bad_scsi_ptr; 1345 } 1346 1347 if (!sc_cmd->sense_buffer) { 1348 QEDF_ERR(&qedf->dbg_ctx, 1349 "sc_cmd->sense_buffer for sc_cmd %p is NULL.\n", 1350 sc_cmd); 1351 goto bad_scsi_ptr; 1352 } 1353 1354 if (!virt_addr_valid(sc_cmd->sense_buffer)) { 1355 QEDF_ERR(&qedf->dbg_ctx, 1356 "sc_cmd->sense_buffer for sc_cmd %p is bad.\n", 1357 sc_cmd); 1358 goto bad_scsi_ptr; 1359 } 1360 1361 if (!sc_cmd->scsi_done) { 1362 QEDF_ERR(&qedf->dbg_ctx, 1363 "sc_cmd->scsi_done for sc_cmd %p is NULL.\n", 1364 sc_cmd); 1365 goto bad_scsi_ptr; 1366 } 1367 1368 qedf_unmap_sg_list(qedf, io_req); 1369 1370 sc_cmd->result = result << 16; 1371 refcount = kref_read(&io_req->refcount); 1372 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "%d:0:%d:%lld: Completing " 1373 "sc_cmd=%p result=0x%08x op=0x%02x lba=0x%02x%02x%02x%02x, " 1374 "allowed=%d retries=%d refcount=%d.\n", 1375 qedf->lport->host->host_no, sc_cmd->device->id, 1376 sc_cmd->device->lun, sc_cmd, sc_cmd->result, sc_cmd->cmnd[0], 1377 sc_cmd->cmnd[2], sc_cmd->cmnd[3], sc_cmd->cmnd[4], 1378 sc_cmd->cmnd[5], sc_cmd->allowed, sc_cmd->retries, 1379 refcount); 1380 1381 /* 1382 * Set resid to the whole buffer length so we won't try to resue any 1383 * previously read data 1384 */ 1385 scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); 1386 1387 if (qedf_io_tracing) 1388 qedf_trace_io(io_req->fcport, io_req, QEDF_IO_TRACE_RSP); 1389 1390 io_req->sc_cmd = NULL; 1391 sc_cmd->SCp.ptr = NULL; 1392 sc_cmd->scsi_done(sc_cmd); 1393 kref_put(&io_req->refcount, qedf_release_cmd); 1394 return; 1395 1396 bad_scsi_ptr: 1397 /* 1398 * Clear the io_req->sc_cmd backpointer so we don't try to process 1399 * this again 1400 */ 1401 io_req->sc_cmd = NULL; 1402 kref_put(&io_req->refcount, qedf_release_cmd); /* ID: 001 */ 1403 } 1404 1405 /* 1406 * Handle warning type CQE completions. This is mainly used for REC timer 1407 * popping. 1408 */ 1409 void qedf_process_warning_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1410 struct qedf_ioreq *io_req) 1411 { 1412 int rval, i; 1413 struct qedf_rport *fcport = io_req->fcport; 1414 u64 err_warn_bit_map; 1415 u8 err_warn = 0xff; 1416 1417 if (!cqe) 1418 return; 1419 1420 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "Warning CQE, " 1421 "xid=0x%x\n", io_req->xid); 1422 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), 1423 "err_warn_bitmap=%08x:%08x\n", 1424 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_hi), 1425 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_lo)); 1426 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "tx_buff_off=%08x, " 1427 "rx_buff_off=%08x, rx_id=%04x\n", 1428 le32_to_cpu(cqe->cqe_info.err_info.tx_buf_off), 1429 le32_to_cpu(cqe->cqe_info.err_info.rx_buf_off), 1430 le32_to_cpu(cqe->cqe_info.err_info.rx_id)); 1431 1432 /* Normalize the error bitmap value to an just an unsigned int */ 1433 err_warn_bit_map = (u64) 1434 ((u64)cqe->cqe_info.err_info.err_warn_bitmap_hi << 32) | 1435 (u64)cqe->cqe_info.err_info.err_warn_bitmap_lo; 1436 for (i = 0; i < 64; i++) { 1437 if (err_warn_bit_map & (u64)((u64)1 << i)) { 1438 err_warn = i; 1439 break; 1440 } 1441 } 1442 1443 /* Check if REC TOV expired if this is a tape device */ 1444 if (fcport->dev_type == QEDF_RPORT_TYPE_TAPE) { 1445 if (err_warn == 1446 FCOE_WARNING_CODE_REC_TOV_TIMER_EXPIRATION) { 1447 QEDF_ERR(&(qedf->dbg_ctx), "REC timer expired.\n"); 1448 if (!test_bit(QEDF_CMD_SRR_SENT, &io_req->flags)) { 1449 io_req->rx_buf_off = 1450 cqe->cqe_info.err_info.rx_buf_off; 1451 io_req->tx_buf_off = 1452 cqe->cqe_info.err_info.tx_buf_off; 1453 io_req->rx_id = cqe->cqe_info.err_info.rx_id; 1454 rval = qedf_send_rec(io_req); 1455 /* 1456 * We only want to abort the io_req if we 1457 * can't queue the REC command as we want to 1458 * keep the exchange open for recovery. 1459 */ 1460 if (rval) 1461 goto send_abort; 1462 } 1463 return; 1464 } 1465 } 1466 1467 send_abort: 1468 init_completion(&io_req->abts_done); 1469 rval = qedf_initiate_abts(io_req, true); 1470 if (rval) 1471 QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n"); 1472 } 1473 1474 /* Cleanup a command when we receive an error detection completion */ 1475 void qedf_process_error_detect(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1476 struct qedf_ioreq *io_req) 1477 { 1478 int rval; 1479 1480 if (!cqe) 1481 return; 1482 1483 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "Error detection CQE, " 1484 "xid=0x%x\n", io_req->xid); 1485 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), 1486 "err_warn_bitmap=%08x:%08x\n", 1487 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_hi), 1488 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_lo)); 1489 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "tx_buff_off=%08x, " 1490 "rx_buff_off=%08x, rx_id=%04x\n", 1491 le32_to_cpu(cqe->cqe_info.err_info.tx_buf_off), 1492 le32_to_cpu(cqe->cqe_info.err_info.rx_buf_off), 1493 le32_to_cpu(cqe->cqe_info.err_info.rx_id)); 1494 1495 if (qedf->stop_io_on_error) { 1496 qedf_stop_all_io(qedf); 1497 return; 1498 } 1499 1500 init_completion(&io_req->abts_done); 1501 rval = qedf_initiate_abts(io_req, true); 1502 if (rval) 1503 QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n"); 1504 } 1505 1506 static void qedf_flush_els_req(struct qedf_ctx *qedf, 1507 struct qedf_ioreq *els_req) 1508 { 1509 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1510 "Flushing ELS request xid=0x%x refcount=%d.\n", els_req->xid, 1511 kref_read(&els_req->refcount)); 1512 1513 /* 1514 * Need to distinguish this from a timeout when calling the 1515 * els_req->cb_func. 1516 */ 1517 els_req->event = QEDF_IOREQ_EV_ELS_FLUSH; 1518 1519 /* Cancel the timer */ 1520 cancel_delayed_work_sync(&els_req->timeout_work); 1521 1522 /* Call callback function to complete command */ 1523 if (els_req->cb_func && els_req->cb_arg) { 1524 els_req->cb_func(els_req->cb_arg); 1525 els_req->cb_arg = NULL; 1526 } 1527 1528 /* Release kref for original initiate_els */ 1529 kref_put(&els_req->refcount, qedf_release_cmd); 1530 } 1531 1532 /* A value of -1 for lun is a wild card that means flush all 1533 * active SCSI I/Os for the target. 1534 */ 1535 void qedf_flush_active_ios(struct qedf_rport *fcport, int lun) 1536 { 1537 struct qedf_ioreq *io_req; 1538 struct qedf_ctx *qedf; 1539 struct qedf_cmd_mgr *cmd_mgr; 1540 int i, rc; 1541 unsigned long flags; 1542 int flush_cnt = 0; 1543 int wait_cnt = 100; 1544 int refcount = 0; 1545 1546 if (!fcport) 1547 return; 1548 1549 /* Check that fcport is still offloaded */ 1550 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 1551 QEDF_ERR(NULL, "fcport is no longer offloaded.\n"); 1552 return; 1553 } 1554 1555 qedf = fcport->qedf; 1556 1557 if (!qedf) { 1558 QEDF_ERR(NULL, "qedf is NULL.\n"); 1559 return; 1560 } 1561 1562 /* Only wait for all commands to be queued in the Upload context */ 1563 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags) && 1564 (lun == -1)) { 1565 while (atomic_read(&fcport->ios_to_queue)) { 1566 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1567 "Waiting for %d I/Os to be queued\n", 1568 atomic_read(&fcport->ios_to_queue)); 1569 if (wait_cnt == 0) { 1570 QEDF_ERR(NULL, 1571 "%d IOs request could not be queued\n", 1572 atomic_read(&fcport->ios_to_queue)); 1573 } 1574 msleep(20); 1575 wait_cnt--; 1576 } 1577 } 1578 1579 cmd_mgr = qedf->cmd_mgr; 1580 1581 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1582 "Flush active i/o's num=0x%x fcport=0x%p port_id=0x%06x scsi_id=%d.\n", 1583 atomic_read(&fcport->num_active_ios), fcport, 1584 fcport->rdata->ids.port_id, fcport->rport->scsi_target_id); 1585 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Locking flush mutex.\n"); 1586 1587 mutex_lock(&qedf->flush_mutex); 1588 if (lun == -1) { 1589 set_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags); 1590 } else { 1591 set_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags); 1592 fcport->lun_reset_lun = lun; 1593 } 1594 1595 for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) { 1596 io_req = &cmd_mgr->cmds[i]; 1597 1598 if (!io_req) 1599 continue; 1600 if (!io_req->fcport) 1601 continue; 1602 1603 spin_lock_irqsave(&cmd_mgr->lock, flags); 1604 1605 if (io_req->alloc) { 1606 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags)) { 1607 if (io_req->cmd_type == QEDF_SCSI_CMD) 1608 QEDF_ERR(&qedf->dbg_ctx, 1609 "Allocated but not queued, xid=0x%x\n", 1610 io_req->xid); 1611 } 1612 spin_unlock_irqrestore(&cmd_mgr->lock, flags); 1613 } else { 1614 spin_unlock_irqrestore(&cmd_mgr->lock, flags); 1615 continue; 1616 } 1617 1618 if (io_req->fcport != fcport) 1619 continue; 1620 1621 /* In case of ABTS, CMD_OUTSTANDING is cleared on ABTS response, 1622 * but RRQ is still pending. 1623 * Workaround: Within qedf_send_rrq, we check if the fcport is 1624 * NULL, and we drop the ref on the io_req to clean it up. 1625 */ 1626 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags)) { 1627 refcount = kref_read(&io_req->refcount); 1628 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1629 "Not outstanding, xid=0x%x, cmd_type=%d refcount=%d.\n", 1630 io_req->xid, io_req->cmd_type, refcount); 1631 /* If RRQ work has been queue, try to cancel it and 1632 * free the io_req 1633 */ 1634 if (atomic_read(&io_req->state) == 1635 QEDFC_CMD_ST_RRQ_WAIT) { 1636 if (cancel_delayed_work_sync 1637 (&io_req->rrq_work)) { 1638 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1639 "Putting reference for pending RRQ work xid=0x%x.\n", 1640 io_req->xid); 1641 /* ID: 003 */ 1642 kref_put(&io_req->refcount, 1643 qedf_release_cmd); 1644 } 1645 } 1646 continue; 1647 } 1648 1649 /* Only consider flushing ELS during target reset */ 1650 if (io_req->cmd_type == QEDF_ELS && 1651 lun == -1) { 1652 rc = kref_get_unless_zero(&io_req->refcount); 1653 if (!rc) { 1654 QEDF_ERR(&(qedf->dbg_ctx), 1655 "Could not get kref for ELS io_req=0x%p xid=0x%x.\n", 1656 io_req, io_req->xid); 1657 continue; 1658 } 1659 flush_cnt++; 1660 qedf_flush_els_req(qedf, io_req); 1661 /* 1662 * Release the kref and go back to the top of the 1663 * loop. 1664 */ 1665 goto free_cmd; 1666 } 1667 1668 if (io_req->cmd_type == QEDF_ABTS) { 1669 /* ID: 004 */ 1670 rc = kref_get_unless_zero(&io_req->refcount); 1671 if (!rc) { 1672 QEDF_ERR(&(qedf->dbg_ctx), 1673 "Could not get kref for abort io_req=0x%p xid=0x%x.\n", 1674 io_req, io_req->xid); 1675 continue; 1676 } 1677 if (lun != -1 && io_req->lun != lun) 1678 goto free_cmd; 1679 1680 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1681 "Flushing abort xid=0x%x.\n", io_req->xid); 1682 1683 if (cancel_delayed_work_sync(&io_req->rrq_work)) { 1684 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1685 "Putting ref for cancelled RRQ work xid=0x%x.\n", 1686 io_req->xid); 1687 kref_put(&io_req->refcount, qedf_release_cmd); 1688 } 1689 1690 if (cancel_delayed_work_sync(&io_req->timeout_work)) { 1691 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1692 "Putting ref for cancelled tmo work xid=0x%x.\n", 1693 io_req->xid); 1694 qedf_initiate_cleanup(io_req, true); 1695 /* Notify eh_abort handler that ABTS is 1696 * complete 1697 */ 1698 complete(&io_req->abts_done); 1699 clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 1700 /* ID: 002 */ 1701 kref_put(&io_req->refcount, qedf_release_cmd); 1702 } 1703 flush_cnt++; 1704 goto free_cmd; 1705 } 1706 1707 if (!io_req->sc_cmd) 1708 continue; 1709 if (!io_req->sc_cmd->device) { 1710 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1711 "Device backpointer NULL for sc_cmd=%p.\n", 1712 io_req->sc_cmd); 1713 /* Put reference for non-existent scsi_cmnd */ 1714 io_req->sc_cmd = NULL; 1715 qedf_initiate_cleanup(io_req, false); 1716 kref_put(&io_req->refcount, qedf_release_cmd); 1717 continue; 1718 } 1719 if (lun > -1) { 1720 if (io_req->lun != lun) 1721 continue; 1722 } 1723 1724 /* 1725 * Use kref_get_unless_zero in the unlikely case the command 1726 * we're about to flush was completed in the normal SCSI path 1727 */ 1728 rc = kref_get_unless_zero(&io_req->refcount); 1729 if (!rc) { 1730 QEDF_ERR(&(qedf->dbg_ctx), "Could not get kref for " 1731 "io_req=0x%p xid=0x%x\n", io_req, io_req->xid); 1732 continue; 1733 } 1734 1735 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1736 "Cleanup xid=0x%x.\n", io_req->xid); 1737 flush_cnt++; 1738 1739 /* Cleanup task and return I/O mid-layer */ 1740 qedf_initiate_cleanup(io_req, true); 1741 1742 free_cmd: 1743 kref_put(&io_req->refcount, qedf_release_cmd); /* ID: 004 */ 1744 } 1745 1746 wait_cnt = 60; 1747 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1748 "Flushed 0x%x I/Os, active=0x%x.\n", 1749 flush_cnt, atomic_read(&fcport->num_active_ios)); 1750 /* Only wait for all commands to complete in the Upload context */ 1751 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags) && 1752 (lun == -1)) { 1753 while (atomic_read(&fcport->num_active_ios)) { 1754 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1755 "Flushed 0x%x I/Os, active=0x%x cnt=%d.\n", 1756 flush_cnt, 1757 atomic_read(&fcport->num_active_ios), 1758 wait_cnt); 1759 if (wait_cnt == 0) { 1760 QEDF_ERR(&qedf->dbg_ctx, 1761 "Flushed %d I/Os, active=%d.\n", 1762 flush_cnt, 1763 atomic_read(&fcport->num_active_ios)); 1764 for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) { 1765 io_req = &cmd_mgr->cmds[i]; 1766 if (io_req->fcport && 1767 io_req->fcport == fcport) { 1768 refcount = 1769 kref_read(&io_req->refcount); 1770 set_bit(QEDF_CMD_DIRTY, 1771 &io_req->flags); 1772 QEDF_ERR(&qedf->dbg_ctx, 1773 "Outstanding io_req =%p xid=0x%x flags=0x%lx, sc_cmd=%p refcount=%d cmd_type=%d.\n", 1774 io_req, io_req->xid, 1775 io_req->flags, 1776 io_req->sc_cmd, 1777 refcount, 1778 io_req->cmd_type); 1779 } 1780 } 1781 WARN_ON(1); 1782 break; 1783 } 1784 msleep(500); 1785 wait_cnt--; 1786 } 1787 } 1788 1789 clear_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags); 1790 clear_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags); 1791 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Unlocking flush mutex.\n"); 1792 mutex_unlock(&qedf->flush_mutex); 1793 } 1794 1795 /* 1796 * Initiate a ABTS middle path command. Note that we don't have to initialize 1797 * the task context for an ABTS task. 1798 */ 1799 int qedf_initiate_abts(struct qedf_ioreq *io_req, bool return_scsi_cmd_on_abts) 1800 { 1801 struct fc_lport *lport; 1802 struct qedf_rport *fcport = io_req->fcport; 1803 struct fc_rport_priv *rdata; 1804 struct qedf_ctx *qedf; 1805 u16 xid; 1806 u32 r_a_tov = 0; 1807 int rc = 0; 1808 unsigned long flags; 1809 struct fcoe_wqe *sqe; 1810 u16 sqe_idx; 1811 int refcount = 0; 1812 1813 /* Sanity check qedf_rport before dereferencing any pointers */ 1814 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 1815 QEDF_ERR(NULL, "tgt not offloaded\n"); 1816 rc = 1; 1817 goto out; 1818 } 1819 1820 qedf = fcport->qedf; 1821 rdata = fcport->rdata; 1822 1823 if (!rdata || !kref_get_unless_zero(&rdata->kref)) { 1824 QEDF_ERR(&qedf->dbg_ctx, "stale rport\n"); 1825 rc = 1; 1826 goto out; 1827 } 1828 1829 r_a_tov = rdata->r_a_tov; 1830 lport = qedf->lport; 1831 1832 if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 1833 QEDF_ERR(&(qedf->dbg_ctx), "link is not ready\n"); 1834 rc = 1; 1835 goto drop_rdata_kref; 1836 } 1837 1838 if (atomic_read(&qedf->link_down_tmo_valid) > 0) { 1839 QEDF_ERR(&(qedf->dbg_ctx), "link_down_tmo active.\n"); 1840 rc = 1; 1841 goto drop_rdata_kref; 1842 } 1843 1844 /* Ensure room on SQ */ 1845 if (!atomic_read(&fcport->free_sqes)) { 1846 QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n"); 1847 rc = 1; 1848 goto drop_rdata_kref; 1849 } 1850 1851 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 1852 QEDF_ERR(&qedf->dbg_ctx, "fcport is uploading.\n"); 1853 rc = 1; 1854 goto drop_rdata_kref; 1855 } 1856 1857 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || 1858 test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags) || 1859 test_bit(QEDF_CMD_IN_ABORT, &io_req->flags)) { 1860 QEDF_ERR(&qedf->dbg_ctx, 1861 "io_req xid=0x%x sc_cmd=%p already in cleanup or abort processing or already completed.\n", 1862 io_req->xid, io_req->sc_cmd); 1863 rc = 1; 1864 goto drop_rdata_kref; 1865 } 1866 1867 kref_get(&io_req->refcount); 1868 1869 xid = io_req->xid; 1870 qedf->control_requests++; 1871 qedf->packet_aborts++; 1872 1873 /* Set the command type to abort */ 1874 io_req->cmd_type = QEDF_ABTS; 1875 io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts; 1876 1877 set_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 1878 refcount = kref_read(&io_req->refcount); 1879 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 1880 "ABTS io_req xid = 0x%x refcount=%d\n", 1881 xid, refcount); 1882 1883 qedf_cmd_timer_set(qedf, io_req, QEDF_ABORT_TIMEOUT); 1884 1885 spin_lock_irqsave(&fcport->rport_lock, flags); 1886 1887 sqe_idx = qedf_get_sqe_idx(fcport); 1888 sqe = &fcport->sq[sqe_idx]; 1889 memset(sqe, 0, sizeof(struct fcoe_wqe)); 1890 io_req->task_params->sqe = sqe; 1891 1892 init_initiator_abort_fcoe_task(io_req->task_params); 1893 qedf_ring_doorbell(fcport); 1894 1895 spin_unlock_irqrestore(&fcport->rport_lock, flags); 1896 1897 drop_rdata_kref: 1898 kref_put(&rdata->kref, fc_rport_destroy); 1899 out: 1900 return rc; 1901 } 1902 1903 void qedf_process_abts_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1904 struct qedf_ioreq *io_req) 1905 { 1906 uint32_t r_ctl; 1907 uint16_t xid; 1908 int rc; 1909 struct qedf_rport *fcport = io_req->fcport; 1910 1911 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "Entered with xid = " 1912 "0x%x cmd_type = %d\n", io_req->xid, io_req->cmd_type); 1913 1914 xid = io_req->xid; 1915 r_ctl = cqe->cqe_info.abts_info.r_ctl; 1916 1917 /* This was added at a point when we were scheduling abts_compl & 1918 * cleanup_compl on different CPUs and there was a possibility of 1919 * the io_req to be freed from the other context before we got here. 1920 */ 1921 if (!fcport) { 1922 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1923 "Dropping ABTS completion xid=0x%x as fcport is NULL", 1924 io_req->xid); 1925 return; 1926 } 1927 1928 /* 1929 * When flush is active, let the cmds be completed from the cleanup 1930 * context 1931 */ 1932 if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags) || 1933 test_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags)) { 1934 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1935 "Dropping ABTS completion xid=0x%x as fcport is flushing", 1936 io_req->xid); 1937 return; 1938 } 1939 1940 if (!cancel_delayed_work(&io_req->timeout_work)) { 1941 QEDF_ERR(&qedf->dbg_ctx, 1942 "Wasn't able to cancel abts timeout work.\n"); 1943 } 1944 1945 switch (r_ctl) { 1946 case FC_RCTL_BA_ACC: 1947 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, 1948 "ABTS response - ACC Send RRQ after R_A_TOV\n"); 1949 io_req->event = QEDF_IOREQ_EV_ABORT_SUCCESS; 1950 rc = kref_get_unless_zero(&io_req->refcount); /* ID: 003 */ 1951 if (!rc) { 1952 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 1953 "kref is already zero so ABTS was already completed or flushed xid=0x%x.\n", 1954 io_req->xid); 1955 return; 1956 } 1957 /* 1958 * Dont release this cmd yet. It will be relesed 1959 * after we get RRQ response 1960 */ 1961 queue_delayed_work(qedf->dpc_wq, &io_req->rrq_work, 1962 msecs_to_jiffies(qedf->lport->r_a_tov)); 1963 atomic_set(&io_req->state, QEDFC_CMD_ST_RRQ_WAIT); 1964 break; 1965 /* For error cases let the cleanup return the command */ 1966 case FC_RCTL_BA_RJT: 1967 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, 1968 "ABTS response - RJT\n"); 1969 io_req->event = QEDF_IOREQ_EV_ABORT_FAILED; 1970 break; 1971 default: 1972 QEDF_ERR(&(qedf->dbg_ctx), "Unknown ABTS response\n"); 1973 break; 1974 } 1975 1976 clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 1977 1978 if (io_req->sc_cmd) { 1979 if (io_req->return_scsi_cmd_on_abts) 1980 qedf_scsi_done(qedf, io_req, DID_ERROR); 1981 } 1982 1983 /* Notify eh_abort handler that ABTS is complete */ 1984 complete(&io_req->abts_done); 1985 1986 kref_put(&io_req->refcount, qedf_release_cmd); 1987 } 1988 1989 int qedf_init_mp_req(struct qedf_ioreq *io_req) 1990 { 1991 struct qedf_mp_req *mp_req; 1992 struct scsi_sge *mp_req_bd; 1993 struct scsi_sge *mp_resp_bd; 1994 struct qedf_ctx *qedf = io_req->fcport->qedf; 1995 dma_addr_t addr; 1996 uint64_t sz; 1997 1998 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_MP_REQ, "Entered.\n"); 1999 2000 mp_req = (struct qedf_mp_req *)&(io_req->mp_req); 2001 memset(mp_req, 0, sizeof(struct qedf_mp_req)); 2002 2003 if (io_req->cmd_type != QEDF_ELS) { 2004 mp_req->req_len = sizeof(struct fcp_cmnd); 2005 io_req->data_xfer_len = mp_req->req_len; 2006 } else 2007 mp_req->req_len = io_req->data_xfer_len; 2008 2009 mp_req->req_buf = dma_alloc_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE, 2010 &mp_req->req_buf_dma, GFP_KERNEL); 2011 if (!mp_req->req_buf) { 2012 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP req buffer\n"); 2013 qedf_free_mp_resc(io_req); 2014 return -ENOMEM; 2015 } 2016 2017 mp_req->resp_buf = dma_alloc_coherent(&qedf->pdev->dev, 2018 QEDF_PAGE_SIZE, &mp_req->resp_buf_dma, GFP_KERNEL); 2019 if (!mp_req->resp_buf) { 2020 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc TM resp " 2021 "buffer\n"); 2022 qedf_free_mp_resc(io_req); 2023 return -ENOMEM; 2024 } 2025 2026 /* Allocate and map mp_req_bd and mp_resp_bd */ 2027 sz = sizeof(struct scsi_sge); 2028 mp_req->mp_req_bd = dma_alloc_coherent(&qedf->pdev->dev, sz, 2029 &mp_req->mp_req_bd_dma, GFP_KERNEL); 2030 if (!mp_req->mp_req_bd) { 2031 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP req bd\n"); 2032 qedf_free_mp_resc(io_req); 2033 return -ENOMEM; 2034 } 2035 2036 mp_req->mp_resp_bd = dma_alloc_coherent(&qedf->pdev->dev, sz, 2037 &mp_req->mp_resp_bd_dma, GFP_KERNEL); 2038 if (!mp_req->mp_resp_bd) { 2039 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP resp bd\n"); 2040 qedf_free_mp_resc(io_req); 2041 return -ENOMEM; 2042 } 2043 2044 /* Fill bd table */ 2045 addr = mp_req->req_buf_dma; 2046 mp_req_bd = mp_req->mp_req_bd; 2047 mp_req_bd->sge_addr.lo = U64_LO(addr); 2048 mp_req_bd->sge_addr.hi = U64_HI(addr); 2049 mp_req_bd->sge_len = QEDF_PAGE_SIZE; 2050 2051 /* 2052 * MP buffer is either a task mgmt command or an ELS. 2053 * So the assumption is that it consumes a single bd 2054 * entry in the bd table 2055 */ 2056 mp_resp_bd = mp_req->mp_resp_bd; 2057 addr = mp_req->resp_buf_dma; 2058 mp_resp_bd->sge_addr.lo = U64_LO(addr); 2059 mp_resp_bd->sge_addr.hi = U64_HI(addr); 2060 mp_resp_bd->sge_len = QEDF_PAGE_SIZE; 2061 2062 return 0; 2063 } 2064 2065 /* 2066 * Last ditch effort to clear the port if it's stuck. Used only after a 2067 * cleanup task times out. 2068 */ 2069 static void qedf_drain_request(struct qedf_ctx *qedf) 2070 { 2071 if (test_bit(QEDF_DRAIN_ACTIVE, &qedf->flags)) { 2072 QEDF_ERR(&(qedf->dbg_ctx), "MCP drain already active.\n"); 2073 return; 2074 } 2075 2076 /* Set bit to return all queuecommand requests as busy */ 2077 set_bit(QEDF_DRAIN_ACTIVE, &qedf->flags); 2078 2079 /* Call qed drain request for function. Should be synchronous */ 2080 qed_ops->common->drain(qedf->cdev); 2081 2082 /* Settle time for CQEs to be returned */ 2083 msleep(100); 2084 2085 /* Unplug and continue */ 2086 clear_bit(QEDF_DRAIN_ACTIVE, &qedf->flags); 2087 } 2088 2089 /* 2090 * Returns SUCCESS if the cleanup task does not timeout, otherwise return 2091 * FAILURE. 2092 */ 2093 int qedf_initiate_cleanup(struct qedf_ioreq *io_req, 2094 bool return_scsi_cmd_on_abts) 2095 { 2096 struct qedf_rport *fcport; 2097 struct qedf_ctx *qedf; 2098 uint16_t xid; 2099 struct e4_fcoe_task_context *task; 2100 int tmo = 0; 2101 int rc = SUCCESS; 2102 unsigned long flags; 2103 struct fcoe_wqe *sqe; 2104 u16 sqe_idx; 2105 int refcount = 0; 2106 2107 fcport = io_req->fcport; 2108 if (!fcport) { 2109 QEDF_ERR(NULL, "fcport is NULL.\n"); 2110 return SUCCESS; 2111 } 2112 2113 /* Sanity check qedf_rport before dereferencing any pointers */ 2114 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 2115 QEDF_ERR(NULL, "tgt not offloaded\n"); 2116 rc = 1; 2117 return SUCCESS; 2118 } 2119 2120 qedf = fcport->qedf; 2121 if (!qedf) { 2122 QEDF_ERR(NULL, "qedf is NULL.\n"); 2123 return SUCCESS; 2124 } 2125 2126 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || 2127 test_and_set_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags)) { 2128 QEDF_ERR(&(qedf->dbg_ctx), "io_req xid=0x%x already in " 2129 "cleanup processing or already completed.\n", 2130 io_req->xid); 2131 return SUCCESS; 2132 } 2133 set_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2134 2135 /* Ensure room on SQ */ 2136 if (!atomic_read(&fcport->free_sqes)) { 2137 QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n"); 2138 /* Need to make sure we clear the flag since it was set */ 2139 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2140 return FAILED; 2141 } 2142 2143 if (io_req->cmd_type == QEDF_CLEANUP) { 2144 QEDF_ERR(&qedf->dbg_ctx, 2145 "io_req=0x%x is already a cleanup command cmd_type=%d.\n", 2146 io_req->xid, io_req->cmd_type); 2147 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2148 return SUCCESS; 2149 } 2150 2151 refcount = kref_read(&io_req->refcount); 2152 2153 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 2154 "Entered xid=0x%x sc_cmd=%p cmd_type=%d flags=0x%lx refcount=%d fcport=%p port_id=0x%06x\n", 2155 io_req->xid, io_req->sc_cmd, io_req->cmd_type, io_req->flags, 2156 refcount, fcport, fcport->rdata->ids.port_id); 2157 2158 /* Cleanup cmds re-use the same TID as the original I/O */ 2159 xid = io_req->xid; 2160 io_req->cmd_type = QEDF_CLEANUP; 2161 io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts; 2162 2163 task = qedf_get_task_mem(&qedf->tasks, xid); 2164 2165 init_completion(&io_req->cleanup_done); 2166 2167 spin_lock_irqsave(&fcport->rport_lock, flags); 2168 2169 sqe_idx = qedf_get_sqe_idx(fcport); 2170 sqe = &fcport->sq[sqe_idx]; 2171 memset(sqe, 0, sizeof(struct fcoe_wqe)); 2172 io_req->task_params->sqe = sqe; 2173 2174 init_initiator_cleanup_fcoe_task(io_req->task_params); 2175 qedf_ring_doorbell(fcport); 2176 2177 spin_unlock_irqrestore(&fcport->rport_lock, flags); 2178 2179 tmo = wait_for_completion_timeout(&io_req->cleanup_done, 2180 QEDF_CLEANUP_TIMEOUT * HZ); 2181 2182 if (!tmo) { 2183 rc = FAILED; 2184 /* Timeout case */ 2185 QEDF_ERR(&(qedf->dbg_ctx), "Cleanup command timeout, " 2186 "xid=%x.\n", io_req->xid); 2187 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2188 /* Issue a drain request if cleanup task times out */ 2189 QEDF_ERR(&(qedf->dbg_ctx), "Issuing MCP drain request.\n"); 2190 qedf_drain_request(qedf); 2191 } 2192 2193 /* If it TASK MGMT handle it, reference will be decreased 2194 * in qedf_execute_tmf 2195 */ 2196 if (io_req->tm_flags == FCP_TMF_LUN_RESET || 2197 io_req->tm_flags == FCP_TMF_TGT_RESET) { 2198 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2199 io_req->sc_cmd = NULL; 2200 complete(&io_req->tm_done); 2201 } 2202 2203 if (io_req->sc_cmd) { 2204 if (io_req->return_scsi_cmd_on_abts) 2205 qedf_scsi_done(qedf, io_req, DID_ERROR); 2206 } 2207 2208 if (rc == SUCCESS) 2209 io_req->event = QEDF_IOREQ_EV_CLEANUP_SUCCESS; 2210 else 2211 io_req->event = QEDF_IOREQ_EV_CLEANUP_FAILED; 2212 2213 return rc; 2214 } 2215 2216 void qedf_process_cleanup_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 2217 struct qedf_ioreq *io_req) 2218 { 2219 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "Entered xid = 0x%x\n", 2220 io_req->xid); 2221 2222 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2223 2224 /* Complete so we can finish cleaning up the I/O */ 2225 complete(&io_req->cleanup_done); 2226 } 2227 2228 static int qedf_execute_tmf(struct qedf_rport *fcport, struct scsi_cmnd *sc_cmd, 2229 uint8_t tm_flags) 2230 { 2231 struct qedf_ioreq *io_req; 2232 struct e4_fcoe_task_context *task; 2233 struct qedf_ctx *qedf = fcport->qedf; 2234 struct fc_lport *lport = qedf->lport; 2235 int rc = 0; 2236 uint16_t xid; 2237 int tmo = 0; 2238 int lun = 0; 2239 unsigned long flags; 2240 struct fcoe_wqe *sqe; 2241 u16 sqe_idx; 2242 2243 if (!sc_cmd) { 2244 QEDF_ERR(&(qedf->dbg_ctx), "invalid arg\n"); 2245 return FAILED; 2246 } 2247 2248 lun = (int)sc_cmd->device->lun; 2249 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 2250 QEDF_ERR(&(qedf->dbg_ctx), "fcport not offloaded\n"); 2251 rc = FAILED; 2252 goto no_flush; 2253 } 2254 2255 io_req = qedf_alloc_cmd(fcport, QEDF_TASK_MGMT_CMD); 2256 if (!io_req) { 2257 QEDF_ERR(&(qedf->dbg_ctx), "Failed TMF"); 2258 rc = -EAGAIN; 2259 goto no_flush; 2260 } 2261 2262 if (tm_flags == FCP_TMF_LUN_RESET) 2263 qedf->lun_resets++; 2264 else if (tm_flags == FCP_TMF_TGT_RESET) 2265 qedf->target_resets++; 2266 2267 /* Initialize rest of io_req fields */ 2268 io_req->sc_cmd = sc_cmd; 2269 io_req->fcport = fcport; 2270 io_req->cmd_type = QEDF_TASK_MGMT_CMD; 2271 2272 /* Record which cpu this request is associated with */ 2273 io_req->cpu = smp_processor_id(); 2274 2275 /* Set TM flags */ 2276 io_req->io_req_flags = QEDF_READ; 2277 io_req->data_xfer_len = 0; 2278 io_req->tm_flags = tm_flags; 2279 2280 /* Default is to return a SCSI command when an error occurs */ 2281 io_req->return_scsi_cmd_on_abts = false; 2282 2283 /* Obtain exchange id */ 2284 xid = io_req->xid; 2285 2286 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "TMF io_req xid = " 2287 "0x%x\n", xid); 2288 2289 /* Initialize task context for this IO request */ 2290 task = qedf_get_task_mem(&qedf->tasks, xid); 2291 2292 init_completion(&io_req->tm_done); 2293 2294 spin_lock_irqsave(&fcport->rport_lock, flags); 2295 2296 sqe_idx = qedf_get_sqe_idx(fcport); 2297 sqe = &fcport->sq[sqe_idx]; 2298 memset(sqe, 0, sizeof(struct fcoe_wqe)); 2299 2300 qedf_init_task(fcport, lport, io_req, task, sqe); 2301 qedf_ring_doorbell(fcport); 2302 2303 spin_unlock_irqrestore(&fcport->rport_lock, flags); 2304 2305 set_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2306 tmo = wait_for_completion_timeout(&io_req->tm_done, 2307 QEDF_TM_TIMEOUT * HZ); 2308 2309 if (!tmo) { 2310 rc = FAILED; 2311 QEDF_ERR(&(qedf->dbg_ctx), "wait for tm_cmpl timeout!\n"); 2312 /* Clear outstanding bit since command timed out */ 2313 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2314 io_req->sc_cmd = NULL; 2315 } else { 2316 /* Check TMF response code */ 2317 if (io_req->fcp_rsp_code == 0) 2318 rc = SUCCESS; 2319 else 2320 rc = FAILED; 2321 } 2322 /* 2323 * Double check that fcport has not gone into an uploading state before 2324 * executing the command flush for the LUN/target. 2325 */ 2326 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 2327 QEDF_ERR(&qedf->dbg_ctx, 2328 "fcport is uploading, not executing flush.\n"); 2329 goto no_flush; 2330 } 2331 /* We do not need this io_req any more */ 2332 kref_put(&io_req->refcount, qedf_release_cmd); 2333 2334 2335 if (tm_flags == FCP_TMF_LUN_RESET) 2336 qedf_flush_active_ios(fcport, lun); 2337 else 2338 qedf_flush_active_ios(fcport, -1); 2339 2340 no_flush: 2341 if (rc != SUCCESS) { 2342 QEDF_ERR(&(qedf->dbg_ctx), "task mgmt command failed...\n"); 2343 rc = FAILED; 2344 } else { 2345 QEDF_ERR(&(qedf->dbg_ctx), "task mgmt command success...\n"); 2346 rc = SUCCESS; 2347 } 2348 return rc; 2349 } 2350 2351 int qedf_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags) 2352 { 2353 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 2354 struct fc_rport_libfc_priv *rp = rport->dd_data; 2355 struct qedf_rport *fcport = (struct qedf_rport *)&rp[1]; 2356 struct qedf_ctx *qedf; 2357 struct fc_lport *lport = shost_priv(sc_cmd->device->host); 2358 int rc = SUCCESS; 2359 int rval; 2360 struct qedf_ioreq *io_req = NULL; 2361 int ref_cnt = 0; 2362 struct fc_rport_priv *rdata = fcport->rdata; 2363 2364 QEDF_ERR(NULL, 2365 "tm_flags 0x%x sc_cmd %p op = 0x%02x target_id = 0x%x lun=%d\n", 2366 tm_flags, sc_cmd, sc_cmd->cmnd[0], rport->scsi_target_id, 2367 (int)sc_cmd->device->lun); 2368 2369 if (!rdata || !kref_get_unless_zero(&rdata->kref)) { 2370 QEDF_ERR(NULL, "stale rport\n"); 2371 return FAILED; 2372 } 2373 2374 QEDF_ERR(NULL, "portid=%06x tm_flags =%s\n", rdata->ids.port_id, 2375 (tm_flags == FCP_TMF_TGT_RESET) ? "TARGET RESET" : 2376 "LUN RESET"); 2377 2378 if (sc_cmd->SCp.ptr) { 2379 io_req = (struct qedf_ioreq *)sc_cmd->SCp.ptr; 2380 ref_cnt = kref_read(&io_req->refcount); 2381 QEDF_ERR(NULL, 2382 "orig io_req = %p xid = 0x%x ref_cnt = %d.\n", 2383 io_req, io_req->xid, ref_cnt); 2384 } 2385 2386 rval = fc_remote_port_chkready(rport); 2387 if (rval) { 2388 QEDF_ERR(NULL, "device_reset rport not ready\n"); 2389 rc = FAILED; 2390 goto tmf_err; 2391 } 2392 2393 rc = fc_block_scsi_eh(sc_cmd); 2394 if (rc) 2395 goto tmf_err; 2396 2397 if (!fcport) { 2398 QEDF_ERR(NULL, "device_reset: rport is NULL\n"); 2399 rc = FAILED; 2400 goto tmf_err; 2401 } 2402 2403 qedf = fcport->qedf; 2404 2405 if (!qedf) { 2406 QEDF_ERR(NULL, "qedf is NULL.\n"); 2407 rc = FAILED; 2408 goto tmf_err; 2409 } 2410 2411 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 2412 QEDF_ERR(&qedf->dbg_ctx, "Connection is getting uploaded.\n"); 2413 rc = SUCCESS; 2414 goto tmf_err; 2415 } 2416 2417 if (test_bit(QEDF_UNLOADING, &qedf->flags) || 2418 test_bit(QEDF_DBG_STOP_IO, &qedf->flags)) { 2419 rc = SUCCESS; 2420 goto tmf_err; 2421 } 2422 2423 if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 2424 QEDF_ERR(&(qedf->dbg_ctx), "link is not ready\n"); 2425 rc = FAILED; 2426 goto tmf_err; 2427 } 2428 2429 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 2430 if (!fcport->rdata) 2431 QEDF_ERR(&qedf->dbg_ctx, "fcport %p is uploading.\n", 2432 fcport); 2433 else 2434 QEDF_ERR(&qedf->dbg_ctx, 2435 "fcport %p port_id=%06x is uploading.\n", 2436 fcport, fcport->rdata->ids.port_id); 2437 rc = FAILED; 2438 goto tmf_err; 2439 } 2440 2441 rc = qedf_execute_tmf(fcport, sc_cmd, tm_flags); 2442 2443 tmf_err: 2444 kref_put(&rdata->kref, fc_rport_destroy); 2445 return rc; 2446 } 2447 2448 void qedf_process_tmf_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 2449 struct qedf_ioreq *io_req) 2450 { 2451 struct fcoe_cqe_rsp_info *fcp_rsp; 2452 2453 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2454 2455 fcp_rsp = &cqe->cqe_info.rsp_info; 2456 qedf_parse_fcp_rsp(io_req, fcp_rsp); 2457 2458 io_req->sc_cmd = NULL; 2459 complete(&io_req->tm_done); 2460 } 2461 2462 void qedf_process_unsol_compl(struct qedf_ctx *qedf, uint16_t que_idx, 2463 struct fcoe_cqe *cqe) 2464 { 2465 unsigned long flags; 2466 uint16_t tmp; 2467 uint16_t pktlen = cqe->cqe_info.unsolic_info.pkt_len; 2468 u32 payload_len, crc; 2469 struct fc_frame_header *fh; 2470 struct fc_frame *fp; 2471 struct qedf_io_work *io_work; 2472 u32 bdq_idx; 2473 void *bdq_addr; 2474 struct scsi_bd *p_bd_info; 2475 2476 p_bd_info = &cqe->cqe_info.unsolic_info.bd_info; 2477 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL, 2478 "address.hi=%x, address.lo=%x, opaque_data.hi=%x, opaque_data.lo=%x, bdq_prod_idx=%u, len=%u\n", 2479 le32_to_cpu(p_bd_info->address.hi), 2480 le32_to_cpu(p_bd_info->address.lo), 2481 le32_to_cpu(p_bd_info->opaque.fcoe_opaque.hi), 2482 le32_to_cpu(p_bd_info->opaque.fcoe_opaque.lo), 2483 qedf->bdq_prod_idx, pktlen); 2484 2485 bdq_idx = le32_to_cpu(p_bd_info->opaque.fcoe_opaque.lo); 2486 if (bdq_idx >= QEDF_BDQ_SIZE) { 2487 QEDF_ERR(&(qedf->dbg_ctx), "bdq_idx is out of range %d.\n", 2488 bdq_idx); 2489 goto increment_prod; 2490 } 2491 2492 bdq_addr = qedf->bdq[bdq_idx].buf_addr; 2493 if (!bdq_addr) { 2494 QEDF_ERR(&(qedf->dbg_ctx), "bdq_addr is NULL, dropping " 2495 "unsolicited packet.\n"); 2496 goto increment_prod; 2497 } 2498 2499 if (qedf_dump_frames) { 2500 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL, 2501 "BDQ frame is at addr=%p.\n", bdq_addr); 2502 print_hex_dump(KERN_WARNING, "bdq ", DUMP_PREFIX_OFFSET, 16, 1, 2503 (void *)bdq_addr, pktlen, false); 2504 } 2505 2506 /* Allocate frame */ 2507 payload_len = pktlen - sizeof(struct fc_frame_header); 2508 fp = fc_frame_alloc(qedf->lport, payload_len); 2509 if (!fp) { 2510 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate fp.\n"); 2511 goto increment_prod; 2512 } 2513 2514 /* Copy data from BDQ buffer into fc_frame struct */ 2515 fh = (struct fc_frame_header *)fc_frame_header_get(fp); 2516 memcpy(fh, (void *)bdq_addr, pktlen); 2517 2518 /* Initialize the frame so libfc sees it as a valid frame */ 2519 crc = fcoe_fc_crc(fp); 2520 fc_frame_init(fp); 2521 fr_dev(fp) = qedf->lport; 2522 fr_sof(fp) = FC_SOF_I3; 2523 fr_eof(fp) = FC_EOF_T; 2524 fr_crc(fp) = cpu_to_le32(~crc); 2525 2526 /* 2527 * We need to return the frame back up to libfc in a non-atomic 2528 * context 2529 */ 2530 io_work = mempool_alloc(qedf->io_mempool, GFP_ATOMIC); 2531 if (!io_work) { 2532 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate " 2533 "work for I/O completion.\n"); 2534 fc_frame_free(fp); 2535 goto increment_prod; 2536 } 2537 memset(io_work, 0, sizeof(struct qedf_io_work)); 2538 2539 INIT_WORK(&io_work->work, qedf_fp_io_handler); 2540 2541 /* Copy contents of CQE for deferred processing */ 2542 memcpy(&io_work->cqe, cqe, sizeof(struct fcoe_cqe)); 2543 2544 io_work->qedf = qedf; 2545 io_work->fp = fp; 2546 2547 queue_work_on(smp_processor_id(), qedf_io_wq, &io_work->work); 2548 increment_prod: 2549 spin_lock_irqsave(&qedf->hba_lock, flags); 2550 2551 /* Increment producer to let f/w know we've handled the frame */ 2552 qedf->bdq_prod_idx++; 2553 2554 /* Producer index wraps at uint16_t boundary */ 2555 if (qedf->bdq_prod_idx == 0xffff) 2556 qedf->bdq_prod_idx = 0; 2557 2558 writew(qedf->bdq_prod_idx, qedf->bdq_primary_prod); 2559 tmp = readw(qedf->bdq_primary_prod); 2560 writew(qedf->bdq_prod_idx, qedf->bdq_secondary_prod); 2561 tmp = readw(qedf->bdq_secondary_prod); 2562 2563 spin_unlock_irqrestore(&qedf->hba_lock, flags); 2564 } 2565