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 e4_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 e4_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 e4_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 e4_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 uint8_t op; 808 809 spin_lock_irqsave(&qedf->io_trace_lock, flags); 810 811 io_log = &qedf->io_trace_buf[qedf->io_trace_idx]; 812 io_log->direction = direction; 813 io_log->task_id = io_req->xid; 814 io_log->port_id = fcport->rdata->ids.port_id; 815 io_log->lun = sc_cmd->device->lun; 816 io_log->op = op = sc_cmd->cmnd[0]; 817 io_log->lba[0] = sc_cmd->cmnd[2]; 818 io_log->lba[1] = sc_cmd->cmnd[3]; 819 io_log->lba[2] = sc_cmd->cmnd[4]; 820 io_log->lba[3] = sc_cmd->cmnd[5]; 821 io_log->bufflen = scsi_bufflen(sc_cmd); 822 io_log->sg_count = scsi_sg_count(sc_cmd); 823 io_log->result = sc_cmd->result; 824 io_log->jiffies = jiffies; 825 io_log->refcount = kref_read(&io_req->refcount); 826 827 if (direction == QEDF_IO_TRACE_REQ) { 828 /* For requests we only care abot the submission CPU */ 829 io_log->req_cpu = io_req->cpu; 830 io_log->int_cpu = 0; 831 io_log->rsp_cpu = 0; 832 } else if (direction == QEDF_IO_TRACE_RSP) { 833 io_log->req_cpu = io_req->cpu; 834 io_log->int_cpu = io_req->int_cpu; 835 io_log->rsp_cpu = smp_processor_id(); 836 } 837 838 io_log->sge_type = io_req->sge_type; 839 840 qedf->io_trace_idx++; 841 if (qedf->io_trace_idx == QEDF_IO_TRACE_SIZE) 842 qedf->io_trace_idx = 0; 843 844 spin_unlock_irqrestore(&qedf->io_trace_lock, flags); 845 } 846 847 int qedf_post_io_req(struct qedf_rport *fcport, struct qedf_ioreq *io_req) 848 { 849 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 850 struct Scsi_Host *host = sc_cmd->device->host; 851 struct fc_lport *lport = shost_priv(host); 852 struct qedf_ctx *qedf = lport_priv(lport); 853 struct e4_fcoe_task_context *task_ctx; 854 u16 xid; 855 struct fcoe_wqe *sqe; 856 u16 sqe_idx; 857 858 /* Initialize rest of io_req fileds */ 859 io_req->data_xfer_len = scsi_bufflen(sc_cmd); 860 sc_cmd->SCp.ptr = (char *)io_req; 861 io_req->sge_type = QEDF_IOREQ_FAST_SGE; /* Assume fast SGL by default */ 862 863 /* Record which cpu this request is associated with */ 864 io_req->cpu = smp_processor_id(); 865 866 if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) { 867 io_req->io_req_flags = QEDF_READ; 868 qedf->input_requests++; 869 } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { 870 io_req->io_req_flags = QEDF_WRITE; 871 qedf->output_requests++; 872 } else { 873 io_req->io_req_flags = 0; 874 qedf->control_requests++; 875 } 876 877 xid = io_req->xid; 878 879 /* Build buffer descriptor list for firmware from sg list */ 880 if (qedf_build_bd_list_from_sg(io_req)) { 881 QEDF_ERR(&(qedf->dbg_ctx), "BD list creation failed.\n"); 882 /* Release cmd will release io_req, but sc_cmd is assigned */ 883 io_req->sc_cmd = NULL; 884 kref_put(&io_req->refcount, qedf_release_cmd); 885 return -EAGAIN; 886 } 887 888 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) || 889 test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 890 QEDF_ERR(&(qedf->dbg_ctx), "Session not offloaded yet.\n"); 891 /* Release cmd will release io_req, but sc_cmd is assigned */ 892 io_req->sc_cmd = NULL; 893 kref_put(&io_req->refcount, qedf_release_cmd); 894 return -EINVAL; 895 } 896 897 /* Record LUN number for later use if we neeed them */ 898 io_req->lun = (int)sc_cmd->device->lun; 899 900 /* Obtain free SQE */ 901 sqe_idx = qedf_get_sqe_idx(fcport); 902 sqe = &fcport->sq[sqe_idx]; 903 memset(sqe, 0, sizeof(struct fcoe_wqe)); 904 905 /* Get the task context */ 906 task_ctx = qedf_get_task_mem(&qedf->tasks, xid); 907 if (!task_ctx) { 908 QEDF_WARN(&(qedf->dbg_ctx), "task_ctx is NULL, xid=%d.\n", 909 xid); 910 /* Release cmd will release io_req, but sc_cmd is assigned */ 911 io_req->sc_cmd = NULL; 912 kref_put(&io_req->refcount, qedf_release_cmd); 913 return -EINVAL; 914 } 915 916 qedf_init_task(fcport, lport, io_req, task_ctx, sqe); 917 918 /* Ring doorbell */ 919 qedf_ring_doorbell(fcport); 920 921 /* Set that command is with the firmware now */ 922 set_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 923 924 if (qedf_io_tracing && io_req->sc_cmd) 925 qedf_trace_io(fcport, io_req, QEDF_IO_TRACE_REQ); 926 927 return false; 928 } 929 930 int 931 qedf_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc_cmd) 932 { 933 struct fc_lport *lport = shost_priv(host); 934 struct qedf_ctx *qedf = lport_priv(lport); 935 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 936 struct fc_rport_libfc_priv *rp = rport->dd_data; 937 struct qedf_rport *fcport; 938 struct qedf_ioreq *io_req; 939 int rc = 0; 940 int rval; 941 unsigned long flags = 0; 942 int num_sgs = 0; 943 944 num_sgs = scsi_sg_count(sc_cmd); 945 if (scsi_sg_count(sc_cmd) > QEDF_MAX_BDS_PER_CMD) { 946 QEDF_ERR(&qedf->dbg_ctx, 947 "Number of SG elements %d exceeds what hardware limitation of %d.\n", 948 num_sgs, QEDF_MAX_BDS_PER_CMD); 949 sc_cmd->result = DID_ERROR; 950 sc_cmd->scsi_done(sc_cmd); 951 return 0; 952 } 953 954 if (test_bit(QEDF_UNLOADING, &qedf->flags) || 955 test_bit(QEDF_DBG_STOP_IO, &qedf->flags)) { 956 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 957 "Returning DNC as unloading or stop io, flags 0x%lx.\n", 958 qedf->flags); 959 sc_cmd->result = DID_NO_CONNECT << 16; 960 sc_cmd->scsi_done(sc_cmd); 961 return 0; 962 } 963 964 if (!qedf->pdev->msix_enabled) { 965 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 966 "Completing sc_cmd=%p DID_NO_CONNECT as MSI-X is not enabled.\n", 967 sc_cmd); 968 sc_cmd->result = DID_NO_CONNECT << 16; 969 sc_cmd->scsi_done(sc_cmd); 970 return 0; 971 } 972 973 rval = fc_remote_port_chkready(rport); 974 if (rval) { 975 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 976 "fc_remote_port_chkready failed=0x%x for port_id=0x%06x.\n", 977 rval, rport->port_id); 978 sc_cmd->result = rval; 979 sc_cmd->scsi_done(sc_cmd); 980 return 0; 981 } 982 983 /* Retry command if we are doing a qed drain operation */ 984 if (test_bit(QEDF_DRAIN_ACTIVE, &qedf->flags)) { 985 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Drain active.\n"); 986 rc = SCSI_MLQUEUE_HOST_BUSY; 987 goto exit_qcmd; 988 } 989 990 if (lport->state != LPORT_ST_READY || 991 atomic_read(&qedf->link_state) != QEDF_LINK_UP) { 992 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Link down.\n"); 993 rc = SCSI_MLQUEUE_HOST_BUSY; 994 goto exit_qcmd; 995 } 996 997 /* rport and tgt are allocated together, so tgt should be non-NULL */ 998 fcport = (struct qedf_rport *)&rp[1]; 999 1000 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) || 1001 test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 1002 /* 1003 * Session is not offloaded yet. Let SCSI-ml retry 1004 * the command. 1005 */ 1006 rc = SCSI_MLQUEUE_TARGET_BUSY; 1007 goto exit_qcmd; 1008 } 1009 1010 atomic_inc(&fcport->ios_to_queue); 1011 1012 if (fcport->retry_delay_timestamp) { 1013 /* Take fcport->rport_lock for resetting the delay_timestamp */ 1014 spin_lock_irqsave(&fcport->rport_lock, flags); 1015 if (time_after(jiffies, fcport->retry_delay_timestamp)) { 1016 fcport->retry_delay_timestamp = 0; 1017 } else { 1018 spin_unlock_irqrestore(&fcport->rport_lock, flags); 1019 /* If retry_delay timer is active, flow off the ML */ 1020 rc = SCSI_MLQUEUE_TARGET_BUSY; 1021 atomic_dec(&fcport->ios_to_queue); 1022 goto exit_qcmd; 1023 } 1024 spin_unlock_irqrestore(&fcport->rport_lock, flags); 1025 } 1026 1027 io_req = qedf_alloc_cmd(fcport, QEDF_SCSI_CMD); 1028 if (!io_req) { 1029 rc = SCSI_MLQUEUE_HOST_BUSY; 1030 atomic_dec(&fcport->ios_to_queue); 1031 goto exit_qcmd; 1032 } 1033 1034 io_req->sc_cmd = sc_cmd; 1035 1036 /* Take fcport->rport_lock for posting to fcport send queue */ 1037 spin_lock_irqsave(&fcport->rport_lock, flags); 1038 if (qedf_post_io_req(fcport, io_req)) { 1039 QEDF_WARN(&(qedf->dbg_ctx), "Unable to post io_req\n"); 1040 /* Return SQE to pool */ 1041 atomic_inc(&fcport->free_sqes); 1042 rc = SCSI_MLQUEUE_HOST_BUSY; 1043 } 1044 spin_unlock_irqrestore(&fcport->rport_lock, flags); 1045 atomic_dec(&fcport->ios_to_queue); 1046 1047 exit_qcmd: 1048 return rc; 1049 } 1050 1051 static void qedf_parse_fcp_rsp(struct qedf_ioreq *io_req, 1052 struct fcoe_cqe_rsp_info *fcp_rsp) 1053 { 1054 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1055 struct qedf_ctx *qedf = io_req->fcport->qedf; 1056 u8 rsp_flags = fcp_rsp->rsp_flags.flags; 1057 int fcp_sns_len = 0; 1058 int fcp_rsp_len = 0; 1059 uint8_t *rsp_info, *sense_data; 1060 1061 io_req->fcp_status = FC_GOOD; 1062 io_req->fcp_resid = 0; 1063 if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER | 1064 FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER)) 1065 io_req->fcp_resid = fcp_rsp->fcp_resid; 1066 1067 io_req->scsi_comp_flags = rsp_flags; 1068 CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status = 1069 fcp_rsp->scsi_status_code; 1070 1071 if (rsp_flags & 1072 FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) 1073 fcp_rsp_len = fcp_rsp->fcp_rsp_len; 1074 1075 if (rsp_flags & 1076 FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) 1077 fcp_sns_len = fcp_rsp->fcp_sns_len; 1078 1079 io_req->fcp_rsp_len = fcp_rsp_len; 1080 io_req->fcp_sns_len = fcp_sns_len; 1081 rsp_info = sense_data = io_req->sense_buffer; 1082 1083 /* fetch fcp_rsp_code */ 1084 if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) { 1085 /* Only for task management function */ 1086 io_req->fcp_rsp_code = rsp_info[3]; 1087 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1088 "fcp_rsp_code = %d\n", io_req->fcp_rsp_code); 1089 /* Adjust sense-data location. */ 1090 sense_data += fcp_rsp_len; 1091 } 1092 1093 if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) { 1094 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1095 "Truncating sense buffer\n"); 1096 fcp_sns_len = SCSI_SENSE_BUFFERSIZE; 1097 } 1098 1099 /* The sense buffer can be NULL for TMF commands */ 1100 if (sc_cmd->sense_buffer) { 1101 memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1102 if (fcp_sns_len) 1103 memcpy(sc_cmd->sense_buffer, sense_data, 1104 fcp_sns_len); 1105 } 1106 } 1107 1108 static void qedf_unmap_sg_list(struct qedf_ctx *qedf, struct qedf_ioreq *io_req) 1109 { 1110 struct scsi_cmnd *sc = io_req->sc_cmd; 1111 1112 if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) { 1113 dma_unmap_sg(&qedf->pdev->dev, scsi_sglist(sc), 1114 scsi_sg_count(sc), sc->sc_data_direction); 1115 io_req->bd_tbl->bd_valid = 0; 1116 } 1117 } 1118 1119 void qedf_scsi_completion(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1120 struct qedf_ioreq *io_req) 1121 { 1122 struct scsi_cmnd *sc_cmd; 1123 struct fcoe_cqe_rsp_info *fcp_rsp; 1124 struct qedf_rport *fcport; 1125 int refcount; 1126 u16 scope, qualifier = 0; 1127 u8 fw_residual_flag = 0; 1128 unsigned long flags = 0; 1129 u16 chk_scope = 0; 1130 1131 if (!io_req) 1132 return; 1133 if (!cqe) 1134 return; 1135 1136 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || 1137 test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags) || 1138 test_bit(QEDF_CMD_IN_ABORT, &io_req->flags)) { 1139 QEDF_ERR(&qedf->dbg_ctx, 1140 "io_req xid=0x%x already in cleanup or abort processing or already completed.\n", 1141 io_req->xid); 1142 return; 1143 } 1144 1145 sc_cmd = io_req->sc_cmd; 1146 fcp_rsp = &cqe->cqe_info.rsp_info; 1147 1148 if (!sc_cmd) { 1149 QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd is NULL!\n"); 1150 return; 1151 } 1152 1153 if (!sc_cmd->SCp.ptr) { 1154 QEDF_WARN(&(qedf->dbg_ctx), "SCp.ptr is NULL, returned in " 1155 "another context.\n"); 1156 return; 1157 } 1158 1159 if (!sc_cmd->device) { 1160 QEDF_ERR(&qedf->dbg_ctx, 1161 "Device for sc_cmd %p is NULL.\n", sc_cmd); 1162 return; 1163 } 1164 1165 if (!scsi_cmd_to_rq(sc_cmd)->q) { 1166 QEDF_WARN(&(qedf->dbg_ctx), "request->q is NULL so request " 1167 "is not valid, sc_cmd=%p.\n", sc_cmd); 1168 return; 1169 } 1170 1171 fcport = io_req->fcport; 1172 1173 /* 1174 * When flush is active, let the cmds be completed from the cleanup 1175 * context 1176 */ 1177 if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags) || 1178 (test_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags) && 1179 sc_cmd->device->lun == (u64)fcport->lun_reset_lun)) { 1180 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1181 "Dropping good completion xid=0x%x as fcport is flushing", 1182 io_req->xid); 1183 return; 1184 } 1185 1186 qedf_parse_fcp_rsp(io_req, fcp_rsp); 1187 1188 qedf_unmap_sg_list(qedf, io_req); 1189 1190 /* Check for FCP transport error */ 1191 if (io_req->fcp_rsp_len > 3 && io_req->fcp_rsp_code) { 1192 QEDF_ERR(&(qedf->dbg_ctx), 1193 "FCP I/O protocol failure xid=0x%x fcp_rsp_len=%d " 1194 "fcp_rsp_code=%d.\n", io_req->xid, io_req->fcp_rsp_len, 1195 io_req->fcp_rsp_code); 1196 sc_cmd->result = DID_BUS_BUSY << 16; 1197 goto out; 1198 } 1199 1200 fw_residual_flag = GET_FIELD(cqe->cqe_info.rsp_info.fw_error_flags, 1201 FCOE_CQE_RSP_INFO_FW_UNDERRUN); 1202 if (fw_residual_flag) { 1203 QEDF_ERR(&qedf->dbg_ctx, 1204 "Firmware detected underrun: xid=0x%x fcp_rsp.flags=0x%02x fcp_resid=%d fw_residual=0x%x lba=%02x%02x%02x%02x.\n", 1205 io_req->xid, fcp_rsp->rsp_flags.flags, 1206 io_req->fcp_resid, 1207 cqe->cqe_info.rsp_info.fw_residual, sc_cmd->cmnd[2], 1208 sc_cmd->cmnd[3], sc_cmd->cmnd[4], sc_cmd->cmnd[5]); 1209 1210 if (io_req->cdb_status == 0) 1211 sc_cmd->result = (DID_ERROR << 16) | io_req->cdb_status; 1212 else 1213 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1214 1215 /* 1216 * Set resid to the whole buffer length so we won't try to resue 1217 * any previously data. 1218 */ 1219 scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); 1220 goto out; 1221 } 1222 1223 switch (io_req->fcp_status) { 1224 case FC_GOOD: 1225 if (io_req->cdb_status == 0) { 1226 /* Good I/O completion */ 1227 sc_cmd->result = DID_OK << 16; 1228 } else { 1229 refcount = kref_read(&io_req->refcount); 1230 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1231 "%d:0:%d:%lld xid=0x%0x op=0x%02x " 1232 "lba=%02x%02x%02x%02x cdb_status=%d " 1233 "fcp_resid=0x%x refcount=%d.\n", 1234 qedf->lport->host->host_no, sc_cmd->device->id, 1235 sc_cmd->device->lun, io_req->xid, 1236 sc_cmd->cmnd[0], sc_cmd->cmnd[2], sc_cmd->cmnd[3], 1237 sc_cmd->cmnd[4], sc_cmd->cmnd[5], 1238 io_req->cdb_status, io_req->fcp_resid, 1239 refcount); 1240 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1241 1242 if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL || 1243 io_req->cdb_status == SAM_STAT_BUSY) { 1244 /* 1245 * Check whether we need to set retry_delay at 1246 * all based on retry_delay module parameter 1247 * and the status qualifier. 1248 */ 1249 1250 /* Upper 2 bits */ 1251 scope = fcp_rsp->retry_delay_timer & 0xC000; 1252 /* Lower 14 bits */ 1253 qualifier = fcp_rsp->retry_delay_timer & 0x3FFF; 1254 1255 if (qedf_retry_delay) 1256 chk_scope = 1; 1257 /* Record stats */ 1258 if (io_req->cdb_status == 1259 SAM_STAT_TASK_SET_FULL) 1260 qedf->task_set_fulls++; 1261 else 1262 qedf->busy++; 1263 } 1264 } 1265 if (io_req->fcp_resid) 1266 scsi_set_resid(sc_cmd, io_req->fcp_resid); 1267 1268 if (chk_scope == 1) { 1269 if ((scope == 1 || scope == 2) && 1270 (qualifier > 0 && qualifier <= 0x3FEF)) { 1271 /* Check we don't go over the max */ 1272 if (qualifier > QEDF_RETRY_DELAY_MAX) { 1273 qualifier = QEDF_RETRY_DELAY_MAX; 1274 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1275 "qualifier = %d\n", 1276 (fcp_rsp->retry_delay_timer & 1277 0x3FFF)); 1278 } 1279 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1280 "Scope = %d and qualifier = %d", 1281 scope, qualifier); 1282 /* Take fcport->rport_lock to 1283 * update the retry_delay_timestamp 1284 */ 1285 spin_lock_irqsave(&fcport->rport_lock, flags); 1286 fcport->retry_delay_timestamp = 1287 jiffies + (qualifier * HZ / 10); 1288 spin_unlock_irqrestore(&fcport->rport_lock, 1289 flags); 1290 1291 } else { 1292 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1293 "combination of scope = %d and qualifier = %d is not handled in qedf.\n", 1294 scope, qualifier); 1295 } 1296 } 1297 break; 1298 default: 1299 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "fcp_status=%d.\n", 1300 io_req->fcp_status); 1301 break; 1302 } 1303 1304 out: 1305 if (qedf_io_tracing) 1306 qedf_trace_io(fcport, io_req, QEDF_IO_TRACE_RSP); 1307 1308 /* 1309 * We wait till the end of the function to clear the 1310 * outstanding bit in case we need to send an abort 1311 */ 1312 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 1313 1314 io_req->sc_cmd = NULL; 1315 sc_cmd->SCp.ptr = NULL; 1316 sc_cmd->scsi_done(sc_cmd); 1317 kref_put(&io_req->refcount, qedf_release_cmd); 1318 } 1319 1320 /* Return a SCSI command in some other context besides a normal completion */ 1321 void qedf_scsi_done(struct qedf_ctx *qedf, struct qedf_ioreq *io_req, 1322 int result) 1323 { 1324 struct scsi_cmnd *sc_cmd; 1325 int refcount; 1326 1327 if (!io_req) { 1328 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "io_req is NULL\n"); 1329 return; 1330 } 1331 1332 if (test_and_set_bit(QEDF_CMD_ERR_SCSI_DONE, &io_req->flags)) { 1333 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1334 "io_req:%p scsi_done handling already done\n", 1335 io_req); 1336 return; 1337 } 1338 1339 /* 1340 * We will be done with this command after this call so clear the 1341 * outstanding bit. 1342 */ 1343 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 1344 1345 sc_cmd = io_req->sc_cmd; 1346 1347 if (!sc_cmd) { 1348 QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd is NULL!\n"); 1349 return; 1350 } 1351 1352 if (!virt_addr_valid(sc_cmd)) { 1353 QEDF_ERR(&qedf->dbg_ctx, "sc_cmd=%p is not valid.", sc_cmd); 1354 goto bad_scsi_ptr; 1355 } 1356 1357 if (!sc_cmd->SCp.ptr) { 1358 QEDF_WARN(&(qedf->dbg_ctx), "SCp.ptr is NULL, returned in " 1359 "another context.\n"); 1360 return; 1361 } 1362 1363 if (!sc_cmd->device) { 1364 QEDF_ERR(&qedf->dbg_ctx, "Device for sc_cmd %p is NULL.\n", 1365 sc_cmd); 1366 goto bad_scsi_ptr; 1367 } 1368 1369 if (!virt_addr_valid(sc_cmd->device)) { 1370 QEDF_ERR(&qedf->dbg_ctx, 1371 "Device pointer for sc_cmd %p is bad.\n", sc_cmd); 1372 goto bad_scsi_ptr; 1373 } 1374 1375 if (!sc_cmd->sense_buffer) { 1376 QEDF_ERR(&qedf->dbg_ctx, 1377 "sc_cmd->sense_buffer for sc_cmd %p is NULL.\n", 1378 sc_cmd); 1379 goto bad_scsi_ptr; 1380 } 1381 1382 if (!virt_addr_valid(sc_cmd->sense_buffer)) { 1383 QEDF_ERR(&qedf->dbg_ctx, 1384 "sc_cmd->sense_buffer for sc_cmd %p is bad.\n", 1385 sc_cmd); 1386 goto bad_scsi_ptr; 1387 } 1388 1389 if (!sc_cmd->scsi_done) { 1390 QEDF_ERR(&qedf->dbg_ctx, 1391 "sc_cmd->scsi_done for sc_cmd %p is NULL.\n", 1392 sc_cmd); 1393 goto bad_scsi_ptr; 1394 } 1395 1396 qedf_unmap_sg_list(qedf, io_req); 1397 1398 sc_cmd->result = result << 16; 1399 refcount = kref_read(&io_req->refcount); 1400 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "%d:0:%d:%lld: Completing " 1401 "sc_cmd=%p result=0x%08x op=0x%02x lba=0x%02x%02x%02x%02x, " 1402 "allowed=%d retries=%d refcount=%d.\n", 1403 qedf->lport->host->host_no, sc_cmd->device->id, 1404 sc_cmd->device->lun, sc_cmd, sc_cmd->result, sc_cmd->cmnd[0], 1405 sc_cmd->cmnd[2], sc_cmd->cmnd[3], sc_cmd->cmnd[4], 1406 sc_cmd->cmnd[5], sc_cmd->allowed, sc_cmd->retries, 1407 refcount); 1408 1409 /* 1410 * Set resid to the whole buffer length so we won't try to resue any 1411 * previously read data 1412 */ 1413 scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); 1414 1415 if (qedf_io_tracing) 1416 qedf_trace_io(io_req->fcport, io_req, QEDF_IO_TRACE_RSP); 1417 1418 io_req->sc_cmd = NULL; 1419 sc_cmd->SCp.ptr = NULL; 1420 sc_cmd->scsi_done(sc_cmd); 1421 kref_put(&io_req->refcount, qedf_release_cmd); 1422 return; 1423 1424 bad_scsi_ptr: 1425 /* 1426 * Clear the io_req->sc_cmd backpointer so we don't try to process 1427 * this again 1428 */ 1429 io_req->sc_cmd = NULL; 1430 kref_put(&io_req->refcount, qedf_release_cmd); /* ID: 001 */ 1431 } 1432 1433 /* 1434 * Handle warning type CQE completions. This is mainly used for REC timer 1435 * popping. 1436 */ 1437 void qedf_process_warning_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1438 struct qedf_ioreq *io_req) 1439 { 1440 int rval, i; 1441 struct qedf_rport *fcport = io_req->fcport; 1442 u64 err_warn_bit_map; 1443 u8 err_warn = 0xff; 1444 1445 if (!cqe) { 1446 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1447 "cqe is NULL for io_req %p xid=0x%x\n", 1448 io_req, io_req->xid); 1449 return; 1450 } 1451 1452 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "Warning CQE, " 1453 "xid=0x%x\n", io_req->xid); 1454 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), 1455 "err_warn_bitmap=%08x:%08x\n", 1456 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_hi), 1457 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_lo)); 1458 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "tx_buff_off=%08x, " 1459 "rx_buff_off=%08x, rx_id=%04x\n", 1460 le32_to_cpu(cqe->cqe_info.err_info.tx_buf_off), 1461 le32_to_cpu(cqe->cqe_info.err_info.rx_buf_off), 1462 le32_to_cpu(cqe->cqe_info.err_info.rx_id)); 1463 1464 /* Normalize the error bitmap value to an just an unsigned int */ 1465 err_warn_bit_map = (u64) 1466 ((u64)cqe->cqe_info.err_info.err_warn_bitmap_hi << 32) | 1467 (u64)cqe->cqe_info.err_info.err_warn_bitmap_lo; 1468 for (i = 0; i < 64; i++) { 1469 if (err_warn_bit_map & (u64)((u64)1 << i)) { 1470 err_warn = i; 1471 break; 1472 } 1473 } 1474 1475 /* Check if REC TOV expired if this is a tape device */ 1476 if (fcport->dev_type == QEDF_RPORT_TYPE_TAPE) { 1477 if (err_warn == 1478 FCOE_WARNING_CODE_REC_TOV_TIMER_EXPIRATION) { 1479 QEDF_ERR(&(qedf->dbg_ctx), "REC timer expired.\n"); 1480 if (!test_bit(QEDF_CMD_SRR_SENT, &io_req->flags)) { 1481 io_req->rx_buf_off = 1482 cqe->cqe_info.err_info.rx_buf_off; 1483 io_req->tx_buf_off = 1484 cqe->cqe_info.err_info.tx_buf_off; 1485 io_req->rx_id = cqe->cqe_info.err_info.rx_id; 1486 rval = qedf_send_rec(io_req); 1487 /* 1488 * We only want to abort the io_req if we 1489 * can't queue the REC command as we want to 1490 * keep the exchange open for recovery. 1491 */ 1492 if (rval) 1493 goto send_abort; 1494 } 1495 return; 1496 } 1497 } 1498 1499 send_abort: 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 /* Cleanup a command when we receive an error detection completion */ 1507 void qedf_process_error_detect(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1508 struct qedf_ioreq *io_req) 1509 { 1510 int rval; 1511 1512 if (io_req == NULL) { 1513 QEDF_INFO(NULL, QEDF_LOG_IO, "io_req is NULL.\n"); 1514 return; 1515 } 1516 1517 if (io_req->fcport == NULL) { 1518 QEDF_INFO(NULL, QEDF_LOG_IO, "fcport is NULL.\n"); 1519 return; 1520 } 1521 1522 if (!cqe) { 1523 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1524 "cqe is NULL for io_req %p\n", io_req); 1525 return; 1526 } 1527 1528 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "Error detection CQE, " 1529 "xid=0x%x\n", io_req->xid); 1530 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), 1531 "err_warn_bitmap=%08x:%08x\n", 1532 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_hi), 1533 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_lo)); 1534 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "tx_buff_off=%08x, " 1535 "rx_buff_off=%08x, rx_id=%04x\n", 1536 le32_to_cpu(cqe->cqe_info.err_info.tx_buf_off), 1537 le32_to_cpu(cqe->cqe_info.err_info.rx_buf_off), 1538 le32_to_cpu(cqe->cqe_info.err_info.rx_id)); 1539 1540 /* When flush is active, let the cmds be flushed out from the cleanup context */ 1541 if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &io_req->fcport->flags) || 1542 (test_bit(QEDF_RPORT_IN_LUN_RESET, &io_req->fcport->flags) && 1543 io_req->sc_cmd->device->lun == (u64)io_req->fcport->lun_reset_lun)) { 1544 QEDF_ERR(&qedf->dbg_ctx, 1545 "Dropping EQE for xid=0x%x as fcport is flushing", 1546 io_req->xid); 1547 return; 1548 } 1549 1550 if (qedf->stop_io_on_error) { 1551 qedf_stop_all_io(qedf); 1552 return; 1553 } 1554 1555 init_completion(&io_req->abts_done); 1556 rval = qedf_initiate_abts(io_req, true); 1557 if (rval) 1558 QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n"); 1559 } 1560 1561 static void qedf_flush_els_req(struct qedf_ctx *qedf, 1562 struct qedf_ioreq *els_req) 1563 { 1564 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1565 "Flushing ELS request xid=0x%x refcount=%d.\n", els_req->xid, 1566 kref_read(&els_req->refcount)); 1567 1568 /* 1569 * Need to distinguish this from a timeout when calling the 1570 * els_req->cb_func. 1571 */ 1572 els_req->event = QEDF_IOREQ_EV_ELS_FLUSH; 1573 1574 clear_bit(QEDF_CMD_OUTSTANDING, &els_req->flags); 1575 1576 /* Cancel the timer */ 1577 cancel_delayed_work_sync(&els_req->timeout_work); 1578 1579 /* Call callback function to complete command */ 1580 if (els_req->cb_func && els_req->cb_arg) { 1581 els_req->cb_func(els_req->cb_arg); 1582 els_req->cb_arg = NULL; 1583 } 1584 1585 /* Release kref for original initiate_els */ 1586 kref_put(&els_req->refcount, qedf_release_cmd); 1587 } 1588 1589 /* A value of -1 for lun is a wild card that means flush all 1590 * active SCSI I/Os for the target. 1591 */ 1592 void qedf_flush_active_ios(struct qedf_rport *fcport, int lun) 1593 { 1594 struct qedf_ioreq *io_req; 1595 struct qedf_ctx *qedf; 1596 struct qedf_cmd_mgr *cmd_mgr; 1597 int i, rc; 1598 unsigned long flags; 1599 int flush_cnt = 0; 1600 int wait_cnt = 100; 1601 int refcount = 0; 1602 1603 if (!fcport) { 1604 QEDF_ERR(NULL, "fcport is NULL\n"); 1605 return; 1606 } 1607 1608 /* Check that fcport is still offloaded */ 1609 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 1610 QEDF_ERR(NULL, "fcport is no longer offloaded.\n"); 1611 return; 1612 } 1613 1614 qedf = fcport->qedf; 1615 1616 if (!qedf) { 1617 QEDF_ERR(NULL, "qedf is NULL.\n"); 1618 return; 1619 } 1620 1621 /* Only wait for all commands to be queued in the Upload context */ 1622 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags) && 1623 (lun == -1)) { 1624 while (atomic_read(&fcport->ios_to_queue)) { 1625 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1626 "Waiting for %d I/Os to be queued\n", 1627 atomic_read(&fcport->ios_to_queue)); 1628 if (wait_cnt == 0) { 1629 QEDF_ERR(NULL, 1630 "%d IOs request could not be queued\n", 1631 atomic_read(&fcport->ios_to_queue)); 1632 } 1633 msleep(20); 1634 wait_cnt--; 1635 } 1636 } 1637 1638 cmd_mgr = qedf->cmd_mgr; 1639 1640 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1641 "Flush active i/o's num=0x%x fcport=0x%p port_id=0x%06x scsi_id=%d.\n", 1642 atomic_read(&fcport->num_active_ios), fcport, 1643 fcport->rdata->ids.port_id, fcport->rport->scsi_target_id); 1644 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Locking flush mutex.\n"); 1645 1646 mutex_lock(&qedf->flush_mutex); 1647 if (lun == -1) { 1648 set_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags); 1649 } else { 1650 set_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags); 1651 fcport->lun_reset_lun = lun; 1652 } 1653 1654 for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) { 1655 io_req = &cmd_mgr->cmds[i]; 1656 1657 if (!io_req) 1658 continue; 1659 if (!io_req->fcport) 1660 continue; 1661 1662 spin_lock_irqsave(&cmd_mgr->lock, flags); 1663 1664 if (io_req->alloc) { 1665 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags)) { 1666 if (io_req->cmd_type == QEDF_SCSI_CMD) 1667 QEDF_ERR(&qedf->dbg_ctx, 1668 "Allocated but not queued, xid=0x%x\n", 1669 io_req->xid); 1670 } 1671 spin_unlock_irqrestore(&cmd_mgr->lock, flags); 1672 } else { 1673 spin_unlock_irqrestore(&cmd_mgr->lock, flags); 1674 continue; 1675 } 1676 1677 if (io_req->fcport != fcport) 1678 continue; 1679 1680 /* In case of ABTS, CMD_OUTSTANDING is cleared on ABTS response, 1681 * but RRQ is still pending. 1682 * Workaround: Within qedf_send_rrq, we check if the fcport is 1683 * NULL, and we drop the ref on the io_req to clean it up. 1684 */ 1685 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags)) { 1686 refcount = kref_read(&io_req->refcount); 1687 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1688 "Not outstanding, xid=0x%x, cmd_type=%d refcount=%d.\n", 1689 io_req->xid, io_req->cmd_type, refcount); 1690 /* If RRQ work has been queue, try to cancel it and 1691 * free the io_req 1692 */ 1693 if (atomic_read(&io_req->state) == 1694 QEDFC_CMD_ST_RRQ_WAIT) { 1695 if (cancel_delayed_work_sync 1696 (&io_req->rrq_work)) { 1697 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1698 "Putting reference for pending RRQ work xid=0x%x.\n", 1699 io_req->xid); 1700 /* ID: 003 */ 1701 kref_put(&io_req->refcount, 1702 qedf_release_cmd); 1703 } 1704 } 1705 continue; 1706 } 1707 1708 /* Only consider flushing ELS during target reset */ 1709 if (io_req->cmd_type == QEDF_ELS && 1710 lun == -1) { 1711 rc = kref_get_unless_zero(&io_req->refcount); 1712 if (!rc) { 1713 QEDF_ERR(&(qedf->dbg_ctx), 1714 "Could not get kref for ELS io_req=0x%p xid=0x%x.\n", 1715 io_req, io_req->xid); 1716 continue; 1717 } 1718 qedf_initiate_cleanup(io_req, false); 1719 flush_cnt++; 1720 qedf_flush_els_req(qedf, io_req); 1721 1722 /* 1723 * Release the kref and go back to the top of the 1724 * loop. 1725 */ 1726 goto free_cmd; 1727 } 1728 1729 if (io_req->cmd_type == QEDF_ABTS) { 1730 /* ID: 004 */ 1731 rc = kref_get_unless_zero(&io_req->refcount); 1732 if (!rc) { 1733 QEDF_ERR(&(qedf->dbg_ctx), 1734 "Could not get kref for abort io_req=0x%p xid=0x%x.\n", 1735 io_req, io_req->xid); 1736 continue; 1737 } 1738 if (lun != -1 && io_req->lun != lun) 1739 goto free_cmd; 1740 1741 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1742 "Flushing abort xid=0x%x.\n", io_req->xid); 1743 1744 if (cancel_delayed_work_sync(&io_req->rrq_work)) { 1745 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1746 "Putting ref for cancelled RRQ work xid=0x%x.\n", 1747 io_req->xid); 1748 kref_put(&io_req->refcount, qedf_release_cmd); 1749 } 1750 1751 if (cancel_delayed_work_sync(&io_req->timeout_work)) { 1752 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1753 "Putting ref for cancelled tmo work xid=0x%x.\n", 1754 io_req->xid); 1755 qedf_initiate_cleanup(io_req, true); 1756 /* Notify eh_abort handler that ABTS is 1757 * complete 1758 */ 1759 complete(&io_req->abts_done); 1760 clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 1761 /* ID: 002 */ 1762 kref_put(&io_req->refcount, qedf_release_cmd); 1763 } 1764 flush_cnt++; 1765 goto free_cmd; 1766 } 1767 1768 if (!io_req->sc_cmd) 1769 continue; 1770 if (!io_req->sc_cmd->device) { 1771 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1772 "Device backpointer NULL for sc_cmd=%p.\n", 1773 io_req->sc_cmd); 1774 /* Put reference for non-existent scsi_cmnd */ 1775 io_req->sc_cmd = NULL; 1776 qedf_initiate_cleanup(io_req, false); 1777 kref_put(&io_req->refcount, qedf_release_cmd); 1778 continue; 1779 } 1780 if (lun > -1) { 1781 if (io_req->lun != lun) 1782 continue; 1783 } 1784 1785 /* 1786 * Use kref_get_unless_zero in the unlikely case the command 1787 * we're about to flush was completed in the normal SCSI path 1788 */ 1789 rc = kref_get_unless_zero(&io_req->refcount); 1790 if (!rc) { 1791 QEDF_ERR(&(qedf->dbg_ctx), "Could not get kref for " 1792 "io_req=0x%p xid=0x%x\n", io_req, io_req->xid); 1793 continue; 1794 } 1795 1796 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1797 "Cleanup xid=0x%x.\n", io_req->xid); 1798 flush_cnt++; 1799 1800 /* Cleanup task and return I/O mid-layer */ 1801 qedf_initiate_cleanup(io_req, true); 1802 1803 free_cmd: 1804 kref_put(&io_req->refcount, qedf_release_cmd); /* ID: 004 */ 1805 } 1806 1807 wait_cnt = 60; 1808 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1809 "Flushed 0x%x I/Os, active=0x%x.\n", 1810 flush_cnt, atomic_read(&fcport->num_active_ios)); 1811 /* Only wait for all commands to complete in the Upload context */ 1812 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags) && 1813 (lun == -1)) { 1814 while (atomic_read(&fcport->num_active_ios)) { 1815 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1816 "Flushed 0x%x I/Os, active=0x%x cnt=%d.\n", 1817 flush_cnt, 1818 atomic_read(&fcport->num_active_ios), 1819 wait_cnt); 1820 if (wait_cnt == 0) { 1821 QEDF_ERR(&qedf->dbg_ctx, 1822 "Flushed %d I/Os, active=%d.\n", 1823 flush_cnt, 1824 atomic_read(&fcport->num_active_ios)); 1825 for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) { 1826 io_req = &cmd_mgr->cmds[i]; 1827 if (io_req->fcport && 1828 io_req->fcport == fcport) { 1829 refcount = 1830 kref_read(&io_req->refcount); 1831 set_bit(QEDF_CMD_DIRTY, 1832 &io_req->flags); 1833 QEDF_ERR(&qedf->dbg_ctx, 1834 "Outstanding io_req =%p xid=0x%x flags=0x%lx, sc_cmd=%p refcount=%d cmd_type=%d.\n", 1835 io_req, io_req->xid, 1836 io_req->flags, 1837 io_req->sc_cmd, 1838 refcount, 1839 io_req->cmd_type); 1840 } 1841 } 1842 WARN_ON(1); 1843 break; 1844 } 1845 msleep(500); 1846 wait_cnt--; 1847 } 1848 } 1849 1850 clear_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags); 1851 clear_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags); 1852 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Unlocking flush mutex.\n"); 1853 mutex_unlock(&qedf->flush_mutex); 1854 } 1855 1856 /* 1857 * Initiate a ABTS middle path command. Note that we don't have to initialize 1858 * the task context for an ABTS task. 1859 */ 1860 int qedf_initiate_abts(struct qedf_ioreq *io_req, bool return_scsi_cmd_on_abts) 1861 { 1862 struct fc_lport *lport; 1863 struct qedf_rport *fcport = io_req->fcport; 1864 struct fc_rport_priv *rdata; 1865 struct qedf_ctx *qedf; 1866 u16 xid; 1867 int rc = 0; 1868 unsigned long flags; 1869 struct fcoe_wqe *sqe; 1870 u16 sqe_idx; 1871 int refcount = 0; 1872 1873 /* Sanity check qedf_rport before dereferencing any pointers */ 1874 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 1875 QEDF_ERR(NULL, "tgt not offloaded\n"); 1876 rc = 1; 1877 goto out; 1878 } 1879 1880 qedf = fcport->qedf; 1881 rdata = fcport->rdata; 1882 1883 if (!rdata || !kref_get_unless_zero(&rdata->kref)) { 1884 QEDF_ERR(&qedf->dbg_ctx, "stale rport\n"); 1885 rc = 1; 1886 goto out; 1887 } 1888 1889 lport = qedf->lport; 1890 1891 if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 1892 QEDF_ERR(&(qedf->dbg_ctx), "link is not ready\n"); 1893 rc = 1; 1894 goto drop_rdata_kref; 1895 } 1896 1897 if (atomic_read(&qedf->link_down_tmo_valid) > 0) { 1898 QEDF_ERR(&(qedf->dbg_ctx), "link_down_tmo active.\n"); 1899 rc = 1; 1900 goto drop_rdata_kref; 1901 } 1902 1903 /* Ensure room on SQ */ 1904 if (!atomic_read(&fcport->free_sqes)) { 1905 QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n"); 1906 rc = 1; 1907 goto drop_rdata_kref; 1908 } 1909 1910 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 1911 QEDF_ERR(&qedf->dbg_ctx, "fcport is uploading.\n"); 1912 rc = 1; 1913 goto drop_rdata_kref; 1914 } 1915 1916 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || 1917 test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags) || 1918 test_bit(QEDF_CMD_IN_ABORT, &io_req->flags)) { 1919 QEDF_ERR(&qedf->dbg_ctx, 1920 "io_req xid=0x%x sc_cmd=%p already in cleanup or abort processing or already completed.\n", 1921 io_req->xid, io_req->sc_cmd); 1922 rc = 1; 1923 goto drop_rdata_kref; 1924 } 1925 1926 kref_get(&io_req->refcount); 1927 1928 xid = io_req->xid; 1929 qedf->control_requests++; 1930 qedf->packet_aborts++; 1931 1932 /* Set the command type to abort */ 1933 io_req->cmd_type = QEDF_ABTS; 1934 io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts; 1935 1936 set_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 1937 refcount = kref_read(&io_req->refcount); 1938 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 1939 "ABTS io_req xid = 0x%x refcount=%d\n", 1940 xid, refcount); 1941 1942 qedf_cmd_timer_set(qedf, io_req, QEDF_ABORT_TIMEOUT); 1943 1944 spin_lock_irqsave(&fcport->rport_lock, flags); 1945 1946 sqe_idx = qedf_get_sqe_idx(fcport); 1947 sqe = &fcport->sq[sqe_idx]; 1948 memset(sqe, 0, sizeof(struct fcoe_wqe)); 1949 io_req->task_params->sqe = sqe; 1950 1951 init_initiator_abort_fcoe_task(io_req->task_params); 1952 qedf_ring_doorbell(fcport); 1953 1954 spin_unlock_irqrestore(&fcport->rport_lock, flags); 1955 1956 drop_rdata_kref: 1957 kref_put(&rdata->kref, fc_rport_destroy); 1958 out: 1959 return rc; 1960 } 1961 1962 void qedf_process_abts_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1963 struct qedf_ioreq *io_req) 1964 { 1965 uint32_t r_ctl; 1966 int rc; 1967 struct qedf_rport *fcport = io_req->fcport; 1968 1969 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "Entered with xid = " 1970 "0x%x cmd_type = %d\n", io_req->xid, io_req->cmd_type); 1971 1972 r_ctl = cqe->cqe_info.abts_info.r_ctl; 1973 1974 /* This was added at a point when we were scheduling abts_compl & 1975 * cleanup_compl on different CPUs and there was a possibility of 1976 * the io_req to be freed from the other context before we got here. 1977 */ 1978 if (!fcport) { 1979 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1980 "Dropping ABTS completion xid=0x%x as fcport is NULL", 1981 io_req->xid); 1982 return; 1983 } 1984 1985 /* 1986 * When flush is active, let the cmds be completed from the cleanup 1987 * context 1988 */ 1989 if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags) || 1990 test_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags)) { 1991 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1992 "Dropping ABTS completion xid=0x%x as fcport is flushing", 1993 io_req->xid); 1994 return; 1995 } 1996 1997 if (!cancel_delayed_work(&io_req->timeout_work)) { 1998 QEDF_ERR(&qedf->dbg_ctx, 1999 "Wasn't able to cancel abts timeout work.\n"); 2000 } 2001 2002 switch (r_ctl) { 2003 case FC_RCTL_BA_ACC: 2004 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, 2005 "ABTS response - ACC Send RRQ after R_A_TOV\n"); 2006 io_req->event = QEDF_IOREQ_EV_ABORT_SUCCESS; 2007 rc = kref_get_unless_zero(&io_req->refcount); /* ID: 003 */ 2008 if (!rc) { 2009 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 2010 "kref is already zero so ABTS was already completed or flushed xid=0x%x.\n", 2011 io_req->xid); 2012 return; 2013 } 2014 /* 2015 * Dont release this cmd yet. It will be relesed 2016 * after we get RRQ response 2017 */ 2018 queue_delayed_work(qedf->dpc_wq, &io_req->rrq_work, 2019 msecs_to_jiffies(qedf->lport->r_a_tov)); 2020 atomic_set(&io_req->state, QEDFC_CMD_ST_RRQ_WAIT); 2021 break; 2022 /* For error cases let the cleanup return the command */ 2023 case FC_RCTL_BA_RJT: 2024 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, 2025 "ABTS response - RJT\n"); 2026 io_req->event = QEDF_IOREQ_EV_ABORT_FAILED; 2027 break; 2028 default: 2029 QEDF_ERR(&(qedf->dbg_ctx), "Unknown ABTS response\n"); 2030 break; 2031 } 2032 2033 clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 2034 2035 if (io_req->sc_cmd) { 2036 if (!io_req->return_scsi_cmd_on_abts) 2037 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 2038 "Not call scsi_done for xid=0x%x.\n", 2039 io_req->xid); 2040 if (io_req->return_scsi_cmd_on_abts) 2041 qedf_scsi_done(qedf, io_req, DID_ERROR); 2042 } 2043 2044 /* Notify eh_abort handler that ABTS is complete */ 2045 complete(&io_req->abts_done); 2046 2047 kref_put(&io_req->refcount, qedf_release_cmd); 2048 } 2049 2050 int qedf_init_mp_req(struct qedf_ioreq *io_req) 2051 { 2052 struct qedf_mp_req *mp_req; 2053 struct scsi_sge *mp_req_bd; 2054 struct scsi_sge *mp_resp_bd; 2055 struct qedf_ctx *qedf = io_req->fcport->qedf; 2056 dma_addr_t addr; 2057 uint64_t sz; 2058 2059 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_MP_REQ, "Entered.\n"); 2060 2061 mp_req = (struct qedf_mp_req *)&(io_req->mp_req); 2062 memset(mp_req, 0, sizeof(struct qedf_mp_req)); 2063 2064 if (io_req->cmd_type != QEDF_ELS) { 2065 mp_req->req_len = sizeof(struct fcp_cmnd); 2066 io_req->data_xfer_len = mp_req->req_len; 2067 } else 2068 mp_req->req_len = io_req->data_xfer_len; 2069 2070 mp_req->req_buf = dma_alloc_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE, 2071 &mp_req->req_buf_dma, GFP_KERNEL); 2072 if (!mp_req->req_buf) { 2073 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP req buffer\n"); 2074 qedf_free_mp_resc(io_req); 2075 return -ENOMEM; 2076 } 2077 2078 mp_req->resp_buf = dma_alloc_coherent(&qedf->pdev->dev, 2079 QEDF_PAGE_SIZE, &mp_req->resp_buf_dma, GFP_KERNEL); 2080 if (!mp_req->resp_buf) { 2081 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc TM resp " 2082 "buffer\n"); 2083 qedf_free_mp_resc(io_req); 2084 return -ENOMEM; 2085 } 2086 2087 /* Allocate and map mp_req_bd and mp_resp_bd */ 2088 sz = sizeof(struct scsi_sge); 2089 mp_req->mp_req_bd = dma_alloc_coherent(&qedf->pdev->dev, sz, 2090 &mp_req->mp_req_bd_dma, GFP_KERNEL); 2091 if (!mp_req->mp_req_bd) { 2092 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP req bd\n"); 2093 qedf_free_mp_resc(io_req); 2094 return -ENOMEM; 2095 } 2096 2097 mp_req->mp_resp_bd = dma_alloc_coherent(&qedf->pdev->dev, sz, 2098 &mp_req->mp_resp_bd_dma, GFP_KERNEL); 2099 if (!mp_req->mp_resp_bd) { 2100 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP resp bd\n"); 2101 qedf_free_mp_resc(io_req); 2102 return -ENOMEM; 2103 } 2104 2105 /* Fill bd table */ 2106 addr = mp_req->req_buf_dma; 2107 mp_req_bd = mp_req->mp_req_bd; 2108 mp_req_bd->sge_addr.lo = U64_LO(addr); 2109 mp_req_bd->sge_addr.hi = U64_HI(addr); 2110 mp_req_bd->sge_len = QEDF_PAGE_SIZE; 2111 2112 /* 2113 * MP buffer is either a task mgmt command or an ELS. 2114 * So the assumption is that it consumes a single bd 2115 * entry in the bd table 2116 */ 2117 mp_resp_bd = mp_req->mp_resp_bd; 2118 addr = mp_req->resp_buf_dma; 2119 mp_resp_bd->sge_addr.lo = U64_LO(addr); 2120 mp_resp_bd->sge_addr.hi = U64_HI(addr); 2121 mp_resp_bd->sge_len = QEDF_PAGE_SIZE; 2122 2123 return 0; 2124 } 2125 2126 /* 2127 * Last ditch effort to clear the port if it's stuck. Used only after a 2128 * cleanup task times out. 2129 */ 2130 static void qedf_drain_request(struct qedf_ctx *qedf) 2131 { 2132 if (test_bit(QEDF_DRAIN_ACTIVE, &qedf->flags)) { 2133 QEDF_ERR(&(qedf->dbg_ctx), "MCP drain already active.\n"); 2134 return; 2135 } 2136 2137 /* Set bit to return all queuecommand requests as busy */ 2138 set_bit(QEDF_DRAIN_ACTIVE, &qedf->flags); 2139 2140 /* Call qed drain request for function. Should be synchronous */ 2141 qed_ops->common->drain(qedf->cdev); 2142 2143 /* Settle time for CQEs to be returned */ 2144 msleep(100); 2145 2146 /* Unplug and continue */ 2147 clear_bit(QEDF_DRAIN_ACTIVE, &qedf->flags); 2148 } 2149 2150 /* 2151 * Returns SUCCESS if the cleanup task does not timeout, otherwise return 2152 * FAILURE. 2153 */ 2154 int qedf_initiate_cleanup(struct qedf_ioreq *io_req, 2155 bool return_scsi_cmd_on_abts) 2156 { 2157 struct qedf_rport *fcport; 2158 struct qedf_ctx *qedf; 2159 int tmo = 0; 2160 int rc = SUCCESS; 2161 unsigned long flags; 2162 struct fcoe_wqe *sqe; 2163 u16 sqe_idx; 2164 int refcount = 0; 2165 2166 fcport = io_req->fcport; 2167 if (!fcport) { 2168 QEDF_ERR(NULL, "fcport is NULL.\n"); 2169 return SUCCESS; 2170 } 2171 2172 /* Sanity check qedf_rport before dereferencing any pointers */ 2173 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 2174 QEDF_ERR(NULL, "tgt not offloaded\n"); 2175 return SUCCESS; 2176 } 2177 2178 qedf = fcport->qedf; 2179 if (!qedf) { 2180 QEDF_ERR(NULL, "qedf is NULL.\n"); 2181 return SUCCESS; 2182 } 2183 2184 if (io_req->cmd_type == QEDF_ELS) { 2185 goto process_els; 2186 } 2187 2188 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || 2189 test_and_set_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags)) { 2190 QEDF_ERR(&(qedf->dbg_ctx), "io_req xid=0x%x already in " 2191 "cleanup processing or already completed.\n", 2192 io_req->xid); 2193 return SUCCESS; 2194 } 2195 set_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2196 2197 process_els: 2198 /* Ensure room on SQ */ 2199 if (!atomic_read(&fcport->free_sqes)) { 2200 QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n"); 2201 /* Need to make sure we clear the flag since it was set */ 2202 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2203 return FAILED; 2204 } 2205 2206 if (io_req->cmd_type == QEDF_CLEANUP) { 2207 QEDF_ERR(&qedf->dbg_ctx, 2208 "io_req=0x%x is already a cleanup command cmd_type=%d.\n", 2209 io_req->xid, io_req->cmd_type); 2210 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2211 return SUCCESS; 2212 } 2213 2214 refcount = kref_read(&io_req->refcount); 2215 2216 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 2217 "Entered xid=0x%x sc_cmd=%p cmd_type=%d flags=0x%lx refcount=%d fcport=%p port_id=0x%06x\n", 2218 io_req->xid, io_req->sc_cmd, io_req->cmd_type, io_req->flags, 2219 refcount, fcport, fcport->rdata->ids.port_id); 2220 2221 /* Cleanup cmds re-use the same TID as the original I/O */ 2222 io_req->cmd_type = QEDF_CLEANUP; 2223 io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts; 2224 2225 init_completion(&io_req->cleanup_done); 2226 2227 spin_lock_irqsave(&fcport->rport_lock, flags); 2228 2229 sqe_idx = qedf_get_sqe_idx(fcport); 2230 sqe = &fcport->sq[sqe_idx]; 2231 memset(sqe, 0, sizeof(struct fcoe_wqe)); 2232 io_req->task_params->sqe = sqe; 2233 2234 init_initiator_cleanup_fcoe_task(io_req->task_params); 2235 qedf_ring_doorbell(fcport); 2236 2237 spin_unlock_irqrestore(&fcport->rport_lock, flags); 2238 2239 tmo = wait_for_completion_timeout(&io_req->cleanup_done, 2240 QEDF_CLEANUP_TIMEOUT * HZ); 2241 2242 if (!tmo) { 2243 rc = FAILED; 2244 /* Timeout case */ 2245 QEDF_ERR(&(qedf->dbg_ctx), "Cleanup command timeout, " 2246 "xid=%x.\n", io_req->xid); 2247 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2248 /* Issue a drain request if cleanup task times out */ 2249 QEDF_ERR(&(qedf->dbg_ctx), "Issuing MCP drain request.\n"); 2250 qedf_drain_request(qedf); 2251 } 2252 2253 /* If it TASK MGMT handle it, reference will be decreased 2254 * in qedf_execute_tmf 2255 */ 2256 if (io_req->tm_flags == FCP_TMF_LUN_RESET || 2257 io_req->tm_flags == FCP_TMF_TGT_RESET) { 2258 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2259 io_req->sc_cmd = NULL; 2260 complete(&io_req->tm_done); 2261 } 2262 2263 if (io_req->sc_cmd) { 2264 if (!io_req->return_scsi_cmd_on_abts) 2265 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 2266 "Not call scsi_done for xid=0x%x.\n", 2267 io_req->xid); 2268 if (io_req->return_scsi_cmd_on_abts) 2269 qedf_scsi_done(qedf, io_req, DID_ERROR); 2270 } 2271 2272 if (rc == SUCCESS) 2273 io_req->event = QEDF_IOREQ_EV_CLEANUP_SUCCESS; 2274 else 2275 io_req->event = QEDF_IOREQ_EV_CLEANUP_FAILED; 2276 2277 return rc; 2278 } 2279 2280 void qedf_process_cleanup_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 2281 struct qedf_ioreq *io_req) 2282 { 2283 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "Entered xid = 0x%x\n", 2284 io_req->xid); 2285 2286 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2287 2288 /* Complete so we can finish cleaning up the I/O */ 2289 complete(&io_req->cleanup_done); 2290 } 2291 2292 static int qedf_execute_tmf(struct qedf_rport *fcport, struct scsi_cmnd *sc_cmd, 2293 uint8_t tm_flags) 2294 { 2295 struct qedf_ioreq *io_req; 2296 struct e4_fcoe_task_context *task; 2297 struct qedf_ctx *qedf = fcport->qedf; 2298 struct fc_lport *lport = qedf->lport; 2299 int rc = 0; 2300 uint16_t xid; 2301 int tmo = 0; 2302 int lun = 0; 2303 unsigned long flags; 2304 struct fcoe_wqe *sqe; 2305 u16 sqe_idx; 2306 2307 if (!sc_cmd) { 2308 QEDF_ERR(&qedf->dbg_ctx, "sc_cmd is NULL\n"); 2309 return FAILED; 2310 } 2311 2312 lun = (int)sc_cmd->device->lun; 2313 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 2314 QEDF_ERR(&(qedf->dbg_ctx), "fcport not offloaded\n"); 2315 rc = FAILED; 2316 goto no_flush; 2317 } 2318 2319 io_req = qedf_alloc_cmd(fcport, QEDF_TASK_MGMT_CMD); 2320 if (!io_req) { 2321 QEDF_ERR(&(qedf->dbg_ctx), "Failed TMF"); 2322 rc = -EAGAIN; 2323 goto no_flush; 2324 } 2325 2326 if (tm_flags == FCP_TMF_LUN_RESET) 2327 qedf->lun_resets++; 2328 else if (tm_flags == FCP_TMF_TGT_RESET) 2329 qedf->target_resets++; 2330 2331 /* Initialize rest of io_req fields */ 2332 io_req->sc_cmd = sc_cmd; 2333 io_req->fcport = fcport; 2334 io_req->cmd_type = QEDF_TASK_MGMT_CMD; 2335 2336 /* Record which cpu this request is associated with */ 2337 io_req->cpu = smp_processor_id(); 2338 2339 /* Set TM flags */ 2340 io_req->io_req_flags = QEDF_READ; 2341 io_req->data_xfer_len = 0; 2342 io_req->tm_flags = tm_flags; 2343 2344 /* Default is to return a SCSI command when an error occurs */ 2345 io_req->return_scsi_cmd_on_abts = false; 2346 2347 /* Obtain exchange id */ 2348 xid = io_req->xid; 2349 2350 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "TMF io_req xid = " 2351 "0x%x\n", xid); 2352 2353 /* Initialize task context for this IO request */ 2354 task = qedf_get_task_mem(&qedf->tasks, xid); 2355 2356 init_completion(&io_req->tm_done); 2357 2358 spin_lock_irqsave(&fcport->rport_lock, flags); 2359 2360 sqe_idx = qedf_get_sqe_idx(fcport); 2361 sqe = &fcport->sq[sqe_idx]; 2362 memset(sqe, 0, sizeof(struct fcoe_wqe)); 2363 2364 qedf_init_task(fcport, lport, io_req, task, sqe); 2365 qedf_ring_doorbell(fcport); 2366 2367 spin_unlock_irqrestore(&fcport->rport_lock, flags); 2368 2369 set_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2370 tmo = wait_for_completion_timeout(&io_req->tm_done, 2371 QEDF_TM_TIMEOUT * HZ); 2372 2373 if (!tmo) { 2374 rc = FAILED; 2375 QEDF_ERR(&(qedf->dbg_ctx), "wait for tm_cmpl timeout!\n"); 2376 /* Clear outstanding bit since command timed out */ 2377 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2378 io_req->sc_cmd = NULL; 2379 } else { 2380 /* Check TMF response code */ 2381 if (io_req->fcp_rsp_code == 0) 2382 rc = SUCCESS; 2383 else 2384 rc = FAILED; 2385 } 2386 /* 2387 * Double check that fcport has not gone into an uploading state before 2388 * executing the command flush for the LUN/target. 2389 */ 2390 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 2391 QEDF_ERR(&qedf->dbg_ctx, 2392 "fcport is uploading, not executing flush.\n"); 2393 goto no_flush; 2394 } 2395 /* We do not need this io_req any more */ 2396 kref_put(&io_req->refcount, qedf_release_cmd); 2397 2398 2399 if (tm_flags == FCP_TMF_LUN_RESET) 2400 qedf_flush_active_ios(fcport, lun); 2401 else 2402 qedf_flush_active_ios(fcport, -1); 2403 2404 no_flush: 2405 if (rc != SUCCESS) { 2406 QEDF_ERR(&(qedf->dbg_ctx), "task mgmt command failed...\n"); 2407 rc = FAILED; 2408 } else { 2409 QEDF_ERR(&(qedf->dbg_ctx), "task mgmt command success...\n"); 2410 rc = SUCCESS; 2411 } 2412 return rc; 2413 } 2414 2415 int qedf_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags) 2416 { 2417 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 2418 struct fc_rport_libfc_priv *rp = rport->dd_data; 2419 struct qedf_rport *fcport = (struct qedf_rport *)&rp[1]; 2420 struct qedf_ctx *qedf; 2421 struct fc_lport *lport = shost_priv(sc_cmd->device->host); 2422 int rc = SUCCESS; 2423 int rval; 2424 struct qedf_ioreq *io_req = NULL; 2425 int ref_cnt = 0; 2426 struct fc_rport_priv *rdata = fcport->rdata; 2427 2428 QEDF_ERR(NULL, 2429 "tm_flags 0x%x sc_cmd %p op = 0x%02x target_id = 0x%x lun=%d\n", 2430 tm_flags, sc_cmd, sc_cmd->cmd_len ? sc_cmd->cmnd[0] : 0xff, 2431 rport->scsi_target_id, (int)sc_cmd->device->lun); 2432 2433 if (!rdata || !kref_get_unless_zero(&rdata->kref)) { 2434 QEDF_ERR(NULL, "stale rport\n"); 2435 return FAILED; 2436 } 2437 2438 QEDF_ERR(NULL, "portid=%06x tm_flags =%s\n", rdata->ids.port_id, 2439 (tm_flags == FCP_TMF_TGT_RESET) ? "TARGET RESET" : 2440 "LUN RESET"); 2441 2442 if (sc_cmd->SCp.ptr) { 2443 io_req = (struct qedf_ioreq *)sc_cmd->SCp.ptr; 2444 ref_cnt = kref_read(&io_req->refcount); 2445 QEDF_ERR(NULL, 2446 "orig io_req = %p xid = 0x%x ref_cnt = %d.\n", 2447 io_req, io_req->xid, ref_cnt); 2448 } 2449 2450 rval = fc_remote_port_chkready(rport); 2451 if (rval) { 2452 QEDF_ERR(NULL, "device_reset rport not ready\n"); 2453 rc = FAILED; 2454 goto tmf_err; 2455 } 2456 2457 rc = fc_block_scsi_eh(sc_cmd); 2458 if (rc) 2459 goto tmf_err; 2460 2461 if (!fcport) { 2462 QEDF_ERR(NULL, "device_reset: rport is NULL\n"); 2463 rc = FAILED; 2464 goto tmf_err; 2465 } 2466 2467 qedf = fcport->qedf; 2468 2469 if (!qedf) { 2470 QEDF_ERR(NULL, "qedf is NULL.\n"); 2471 rc = FAILED; 2472 goto tmf_err; 2473 } 2474 2475 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 2476 QEDF_ERR(&qedf->dbg_ctx, "Connection is getting uploaded.\n"); 2477 rc = SUCCESS; 2478 goto tmf_err; 2479 } 2480 2481 if (test_bit(QEDF_UNLOADING, &qedf->flags) || 2482 test_bit(QEDF_DBG_STOP_IO, &qedf->flags)) { 2483 rc = SUCCESS; 2484 goto tmf_err; 2485 } 2486 2487 if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 2488 QEDF_ERR(&(qedf->dbg_ctx), "link is not ready\n"); 2489 rc = FAILED; 2490 goto tmf_err; 2491 } 2492 2493 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 2494 if (!fcport->rdata) 2495 QEDF_ERR(&qedf->dbg_ctx, "fcport %p is uploading.\n", 2496 fcport); 2497 else 2498 QEDF_ERR(&qedf->dbg_ctx, 2499 "fcport %p port_id=%06x is uploading.\n", 2500 fcport, fcport->rdata->ids.port_id); 2501 rc = FAILED; 2502 goto tmf_err; 2503 } 2504 2505 rc = qedf_execute_tmf(fcport, sc_cmd, tm_flags); 2506 2507 tmf_err: 2508 kref_put(&rdata->kref, fc_rport_destroy); 2509 return rc; 2510 } 2511 2512 void qedf_process_tmf_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 2513 struct qedf_ioreq *io_req) 2514 { 2515 struct fcoe_cqe_rsp_info *fcp_rsp; 2516 2517 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2518 2519 fcp_rsp = &cqe->cqe_info.rsp_info; 2520 qedf_parse_fcp_rsp(io_req, fcp_rsp); 2521 2522 io_req->sc_cmd = NULL; 2523 complete(&io_req->tm_done); 2524 } 2525 2526 void qedf_process_unsol_compl(struct qedf_ctx *qedf, uint16_t que_idx, 2527 struct fcoe_cqe *cqe) 2528 { 2529 unsigned long flags; 2530 uint16_t pktlen = cqe->cqe_info.unsolic_info.pkt_len; 2531 u32 payload_len, crc; 2532 struct fc_frame_header *fh; 2533 struct fc_frame *fp; 2534 struct qedf_io_work *io_work; 2535 u32 bdq_idx; 2536 void *bdq_addr; 2537 struct scsi_bd *p_bd_info; 2538 2539 p_bd_info = &cqe->cqe_info.unsolic_info.bd_info; 2540 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL, 2541 "address.hi=%x, address.lo=%x, opaque_data.hi=%x, opaque_data.lo=%x, bdq_prod_idx=%u, len=%u\n", 2542 le32_to_cpu(p_bd_info->address.hi), 2543 le32_to_cpu(p_bd_info->address.lo), 2544 le32_to_cpu(p_bd_info->opaque.fcoe_opaque.hi), 2545 le32_to_cpu(p_bd_info->opaque.fcoe_opaque.lo), 2546 qedf->bdq_prod_idx, pktlen); 2547 2548 bdq_idx = le32_to_cpu(p_bd_info->opaque.fcoe_opaque.lo); 2549 if (bdq_idx >= QEDF_BDQ_SIZE) { 2550 QEDF_ERR(&(qedf->dbg_ctx), "bdq_idx is out of range %d.\n", 2551 bdq_idx); 2552 goto increment_prod; 2553 } 2554 2555 bdq_addr = qedf->bdq[bdq_idx].buf_addr; 2556 if (!bdq_addr) { 2557 QEDF_ERR(&(qedf->dbg_ctx), "bdq_addr is NULL, dropping " 2558 "unsolicited packet.\n"); 2559 goto increment_prod; 2560 } 2561 2562 if (qedf_dump_frames) { 2563 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL, 2564 "BDQ frame is at addr=%p.\n", bdq_addr); 2565 print_hex_dump(KERN_WARNING, "bdq ", DUMP_PREFIX_OFFSET, 16, 1, 2566 (void *)bdq_addr, pktlen, false); 2567 } 2568 2569 /* Allocate frame */ 2570 payload_len = pktlen - sizeof(struct fc_frame_header); 2571 fp = fc_frame_alloc(qedf->lport, payload_len); 2572 if (!fp) { 2573 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate fp.\n"); 2574 goto increment_prod; 2575 } 2576 2577 /* Copy data from BDQ buffer into fc_frame struct */ 2578 fh = (struct fc_frame_header *)fc_frame_header_get(fp); 2579 memcpy(fh, (void *)bdq_addr, pktlen); 2580 2581 QEDF_WARN(&qedf->dbg_ctx, 2582 "Processing Unsolicated frame, src=%06x dest=%06x r_ctl=0x%x type=0x%x cmd=%02x\n", 2583 ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl, 2584 fh->fh_type, fc_frame_payload_op(fp)); 2585 2586 /* Initialize the frame so libfc sees it as a valid frame */ 2587 crc = fcoe_fc_crc(fp); 2588 fc_frame_init(fp); 2589 fr_dev(fp) = qedf->lport; 2590 fr_sof(fp) = FC_SOF_I3; 2591 fr_eof(fp) = FC_EOF_T; 2592 fr_crc(fp) = cpu_to_le32(~crc); 2593 2594 /* 2595 * We need to return the frame back up to libfc in a non-atomic 2596 * context 2597 */ 2598 io_work = mempool_alloc(qedf->io_mempool, GFP_ATOMIC); 2599 if (!io_work) { 2600 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate " 2601 "work for I/O completion.\n"); 2602 fc_frame_free(fp); 2603 goto increment_prod; 2604 } 2605 memset(io_work, 0, sizeof(struct qedf_io_work)); 2606 2607 INIT_WORK(&io_work->work, qedf_fp_io_handler); 2608 2609 /* Copy contents of CQE for deferred processing */ 2610 memcpy(&io_work->cqe, cqe, sizeof(struct fcoe_cqe)); 2611 2612 io_work->qedf = qedf; 2613 io_work->fp = fp; 2614 2615 queue_work_on(smp_processor_id(), qedf_io_wq, &io_work->work); 2616 increment_prod: 2617 spin_lock_irqsave(&qedf->hba_lock, flags); 2618 2619 /* Increment producer to let f/w know we've handled the frame */ 2620 qedf->bdq_prod_idx++; 2621 2622 /* Producer index wraps at uint16_t boundary */ 2623 if (qedf->bdq_prod_idx == 0xffff) 2624 qedf->bdq_prod_idx = 0; 2625 2626 writew(qedf->bdq_prod_idx, qedf->bdq_primary_prod); 2627 readw(qedf->bdq_primary_prod); 2628 writew(qedf->bdq_prod_idx, qedf->bdq_secondary_prod); 2629 readw(qedf->bdq_secondary_prod); 2630 2631 spin_unlock_irqrestore(&qedf->hba_lock, flags); 2632 } 2633