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 if (io_req == NULL) { 27 QEDF_INFO(NULL, QEDF_LOG_IO, "io_req is NULL.\n"); 28 return; 29 } 30 31 fcport = io_req->fcport; 32 if (io_req->fcport == NULL) { 33 QEDF_INFO(NULL, QEDF_LOG_IO, "fcport is NULL.\n"); 34 return; 35 } 36 37 qedf = fcport->qedf; 38 39 switch (io_req->cmd_type) { 40 case QEDF_ABTS: 41 if (qedf == NULL) { 42 QEDF_INFO(NULL, QEDF_LOG_IO, 43 "qedf is NULL for ABTS xid=0x%x.\n", 44 io_req->xid); 45 return; 46 } 47 48 QEDF_ERR((&qedf->dbg_ctx), "ABTS timeout, xid=0x%x.\n", 49 io_req->xid); 50 /* Cleanup timed out ABTS */ 51 qedf_initiate_cleanup(io_req, true); 52 complete(&io_req->abts_done); 53 54 /* 55 * Need to call kref_put for reference taken when initiate_abts 56 * was called since abts_compl won't be called now that we've 57 * cleaned up the task. 58 */ 59 kref_put(&io_req->refcount, qedf_release_cmd); 60 61 /* Clear in abort bit now that we're done with the command */ 62 clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 63 64 /* 65 * Now that the original I/O and the ABTS are complete see 66 * if we need to reconnect to the target. 67 */ 68 qedf_restart_rport(fcport); 69 break; 70 case QEDF_ELS: 71 if (!qedf) { 72 QEDF_INFO(NULL, QEDF_LOG_IO, 73 "qedf is NULL for ELS xid=0x%x.\n", 74 io_req->xid); 75 return; 76 } 77 /* ELS request no longer outstanding since it timed out */ 78 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 79 80 kref_get(&io_req->refcount); 81 /* 82 * Don't attempt to clean an ELS timeout as any subseqeunt 83 * ABTS or cleanup requests just hang. For now just free 84 * the resources of the original I/O and the RRQ 85 */ 86 QEDF_ERR(&(qedf->dbg_ctx), "ELS timeout, xid=0x%x.\n", 87 io_req->xid); 88 qedf_initiate_cleanup(io_req, true); 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 io_req->cb_func(io_req->cb_arg); 93 io_req->cb_arg = NULL; 94 } 95 kref_put(&io_req->refcount, qedf_release_cmd); 96 break; 97 case QEDF_SEQ_CLEANUP: 98 QEDF_ERR(&(qedf->dbg_ctx), "Sequence cleanup timeout, " 99 "xid=0x%x.\n", io_req->xid); 100 qedf_initiate_cleanup(io_req, true); 101 io_req->event = QEDF_IOREQ_EV_ELS_TMO; 102 qedf_process_seq_cleanup_compl(qedf, NULL, io_req); 103 break; 104 default: 105 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 106 "Hit default case, xid=0x%x.\n", io_req->xid); 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 QEDF_ERR(&qedf->dbg_ctx, "io_bdt_pool is NULL.\n"); 127 goto free_cmd_pool; 128 } 129 130 bd_tbl_sz = QEDF_MAX_BDS_PER_CMD * sizeof(struct scsi_sge); 131 for (i = 0; i < num_ios; i++) { 132 bdt_info = cmgr->io_bdt_pool[i]; 133 if (bdt_info->bd_tbl) { 134 dma_free_coherent(&qedf->pdev->dev, bd_tbl_sz, 135 bdt_info->bd_tbl, bdt_info->bd_tbl_dma); 136 bdt_info->bd_tbl = NULL; 137 } 138 } 139 140 /* Destroy io_bdt pool */ 141 for (i = 0; i < num_ios; i++) { 142 kfree(cmgr->io_bdt_pool[i]); 143 cmgr->io_bdt_pool[i] = NULL; 144 } 145 146 kfree(cmgr->io_bdt_pool); 147 cmgr->io_bdt_pool = NULL; 148 149 free_cmd_pool: 150 151 for (i = 0; i < num_ios; i++) { 152 io_req = &cmgr->cmds[i]; 153 kfree(io_req->sgl_task_params); 154 kfree(io_req->task_params); 155 /* Make sure we free per command sense buffer */ 156 if (io_req->sense_buffer) 157 dma_free_coherent(&qedf->pdev->dev, 158 QEDF_SCSI_SENSE_BUFFERSIZE, io_req->sense_buffer, 159 io_req->sense_buffer_dma); 160 cancel_delayed_work_sync(&io_req->rrq_work); 161 } 162 163 /* Free command manager itself */ 164 vfree(cmgr); 165 } 166 167 static void qedf_handle_rrq(struct work_struct *work) 168 { 169 struct qedf_ioreq *io_req = 170 container_of(work, struct qedf_ioreq, rrq_work.work); 171 172 atomic_set(&io_req->state, QEDFC_CMD_ST_RRQ_ACTIVE); 173 qedf_send_rrq(io_req); 174 175 } 176 177 struct qedf_cmd_mgr *qedf_cmd_mgr_alloc(struct qedf_ctx *qedf) 178 { 179 struct qedf_cmd_mgr *cmgr; 180 struct io_bdt *bdt_info; 181 struct qedf_ioreq *io_req; 182 u16 xid; 183 int i; 184 int num_ios; 185 u16 min_xid = 0; 186 u16 max_xid = (FCOE_PARAMS_NUM_TASKS - 1); 187 188 /* Make sure num_queues is already set before calling this function */ 189 if (!qedf->num_queues) { 190 QEDF_ERR(&(qedf->dbg_ctx), "num_queues is not set.\n"); 191 return NULL; 192 } 193 194 if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN) { 195 QEDF_WARN(&(qedf->dbg_ctx), "Invalid min_xid 0x%x and " 196 "max_xid 0x%x.\n", min_xid, max_xid); 197 return NULL; 198 } 199 200 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "min xid 0x%x, max xid " 201 "0x%x.\n", min_xid, max_xid); 202 203 num_ios = max_xid - min_xid + 1; 204 205 cmgr = vzalloc(sizeof(struct qedf_cmd_mgr)); 206 if (!cmgr) { 207 QEDF_WARN(&(qedf->dbg_ctx), "Failed to alloc cmd mgr.\n"); 208 return NULL; 209 } 210 211 cmgr->qedf = qedf; 212 spin_lock_init(&cmgr->lock); 213 214 /* 215 * Initialize I/O request fields. 216 */ 217 xid = 0; 218 219 for (i = 0; i < num_ios; i++) { 220 io_req = &cmgr->cmds[i]; 221 INIT_DELAYED_WORK(&io_req->timeout_work, qedf_cmd_timeout); 222 223 io_req->xid = xid++; 224 225 INIT_DELAYED_WORK(&io_req->rrq_work, qedf_handle_rrq); 226 227 /* Allocate DMA memory to hold sense buffer */ 228 io_req->sense_buffer = dma_alloc_coherent(&qedf->pdev->dev, 229 QEDF_SCSI_SENSE_BUFFERSIZE, &io_req->sense_buffer_dma, 230 GFP_KERNEL); 231 if (!io_req->sense_buffer) { 232 QEDF_ERR(&qedf->dbg_ctx, 233 "Failed to alloc sense buffer.\n"); 234 goto mem_err; 235 } 236 237 /* Allocate task parameters to pass to f/w init funcions */ 238 io_req->task_params = kzalloc(sizeof(*io_req->task_params), 239 GFP_KERNEL); 240 if (!io_req->task_params) { 241 QEDF_ERR(&(qedf->dbg_ctx), 242 "Failed to allocate task_params for xid=0x%x\n", 243 i); 244 goto mem_err; 245 } 246 247 /* 248 * Allocate scatter/gather list info to pass to f/w init 249 * functions. 250 */ 251 io_req->sgl_task_params = kzalloc( 252 sizeof(struct scsi_sgl_task_params), GFP_KERNEL); 253 if (!io_req->sgl_task_params) { 254 QEDF_ERR(&(qedf->dbg_ctx), 255 "Failed to allocate sgl_task_params for xid=0x%x\n", 256 i); 257 goto mem_err; 258 } 259 } 260 261 /* Allocate pool of io_bdts - one for each qedf_ioreq */ 262 cmgr->io_bdt_pool = kmalloc_array(num_ios, sizeof(struct io_bdt *), 263 GFP_KERNEL); 264 265 if (!cmgr->io_bdt_pool) { 266 QEDF_WARN(&(qedf->dbg_ctx), "Failed to alloc io_bdt_pool.\n"); 267 goto mem_err; 268 } 269 270 for (i = 0; i < num_ios; i++) { 271 cmgr->io_bdt_pool[i] = kmalloc(sizeof(struct io_bdt), 272 GFP_KERNEL); 273 if (!cmgr->io_bdt_pool[i]) { 274 QEDF_WARN(&(qedf->dbg_ctx), 275 "Failed to alloc io_bdt_pool[%d].\n", i); 276 goto mem_err; 277 } 278 } 279 280 for (i = 0; i < num_ios; i++) { 281 bdt_info = cmgr->io_bdt_pool[i]; 282 bdt_info->bd_tbl = dma_alloc_coherent(&qedf->pdev->dev, 283 QEDF_MAX_BDS_PER_CMD * sizeof(struct scsi_sge), 284 &bdt_info->bd_tbl_dma, GFP_KERNEL); 285 if (!bdt_info->bd_tbl) { 286 QEDF_WARN(&(qedf->dbg_ctx), 287 "Failed to alloc bdt_tbl[%d].\n", i); 288 goto mem_err; 289 } 290 } 291 atomic_set(&cmgr->free_list_cnt, num_ios); 292 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 293 "cmgr->free_list_cnt=%d.\n", 294 atomic_read(&cmgr->free_list_cnt)); 295 296 return cmgr; 297 298 mem_err: 299 qedf_cmd_mgr_free(cmgr); 300 return NULL; 301 } 302 303 struct qedf_ioreq *qedf_alloc_cmd(struct qedf_rport *fcport, u8 cmd_type) 304 { 305 struct qedf_ctx *qedf = fcport->qedf; 306 struct qedf_cmd_mgr *cmd_mgr = qedf->cmd_mgr; 307 struct qedf_ioreq *io_req = NULL; 308 struct io_bdt *bd_tbl; 309 u16 xid; 310 uint32_t free_sqes; 311 int i; 312 unsigned long flags; 313 314 free_sqes = atomic_read(&fcport->free_sqes); 315 316 if (!free_sqes) { 317 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 318 "Returning NULL, free_sqes=%d.\n ", 319 free_sqes); 320 goto out_failed; 321 } 322 323 /* Limit the number of outstanding R/W tasks */ 324 if ((atomic_read(&fcport->num_active_ios) >= 325 NUM_RW_TASKS_PER_CONNECTION)) { 326 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 327 "Returning NULL, num_active_ios=%d.\n", 328 atomic_read(&fcport->num_active_ios)); 329 goto out_failed; 330 } 331 332 /* Limit global TIDs certain tasks */ 333 if (atomic_read(&cmd_mgr->free_list_cnt) <= GBL_RSVD_TASKS) { 334 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 335 "Returning NULL, free_list_cnt=%d.\n", 336 atomic_read(&cmd_mgr->free_list_cnt)); 337 goto out_failed; 338 } 339 340 spin_lock_irqsave(&cmd_mgr->lock, flags); 341 for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) { 342 io_req = &cmd_mgr->cmds[cmd_mgr->idx]; 343 cmd_mgr->idx++; 344 if (cmd_mgr->idx == FCOE_PARAMS_NUM_TASKS) 345 cmd_mgr->idx = 0; 346 347 /* Check to make sure command was previously freed */ 348 if (!io_req->alloc) 349 break; 350 } 351 352 if (i == FCOE_PARAMS_NUM_TASKS) { 353 spin_unlock_irqrestore(&cmd_mgr->lock, flags); 354 goto out_failed; 355 } 356 357 if (test_bit(QEDF_CMD_DIRTY, &io_req->flags)) 358 QEDF_ERR(&qedf->dbg_ctx, 359 "io_req found to be dirty ox_id = 0x%x.\n", 360 io_req->xid); 361 362 /* Clear any flags now that we've reallocated the xid */ 363 io_req->flags = 0; 364 io_req->alloc = 1; 365 spin_unlock_irqrestore(&cmd_mgr->lock, flags); 366 367 atomic_inc(&fcport->num_active_ios); 368 atomic_dec(&fcport->free_sqes); 369 xid = io_req->xid; 370 atomic_dec(&cmd_mgr->free_list_cnt); 371 372 io_req->cmd_mgr = cmd_mgr; 373 io_req->fcport = fcport; 374 375 /* Clear any stale sc_cmd back pointer */ 376 io_req->sc_cmd = NULL; 377 io_req->lun = -1; 378 379 /* Hold the io_req against deletion */ 380 kref_init(&io_req->refcount); /* ID: 001 */ 381 atomic_set(&io_req->state, QEDFC_CMD_ST_IO_ACTIVE); 382 383 /* Bind io_bdt for this io_req */ 384 /* Have a static link between io_req and io_bdt_pool */ 385 bd_tbl = io_req->bd_tbl = cmd_mgr->io_bdt_pool[xid]; 386 if (bd_tbl == NULL) { 387 QEDF_ERR(&(qedf->dbg_ctx), "bd_tbl is NULL, xid=%x.\n", xid); 388 kref_put(&io_req->refcount, qedf_release_cmd); 389 goto out_failed; 390 } 391 bd_tbl->io_req = io_req; 392 io_req->cmd_type = cmd_type; 393 io_req->tm_flags = 0; 394 395 /* Reset sequence offset data */ 396 io_req->rx_buf_off = 0; 397 io_req->tx_buf_off = 0; 398 io_req->rx_id = 0xffff; /* No OX_ID */ 399 400 return io_req; 401 402 out_failed: 403 /* Record failure for stats and return NULL to caller */ 404 qedf->alloc_failures++; 405 return NULL; 406 } 407 408 static void qedf_free_mp_resc(struct qedf_ioreq *io_req) 409 { 410 struct qedf_mp_req *mp_req = &(io_req->mp_req); 411 struct qedf_ctx *qedf = io_req->fcport->qedf; 412 uint64_t sz = sizeof(struct scsi_sge); 413 414 /* clear tm flags */ 415 if (mp_req->mp_req_bd) { 416 dma_free_coherent(&qedf->pdev->dev, sz, 417 mp_req->mp_req_bd, mp_req->mp_req_bd_dma); 418 mp_req->mp_req_bd = NULL; 419 } 420 if (mp_req->mp_resp_bd) { 421 dma_free_coherent(&qedf->pdev->dev, sz, 422 mp_req->mp_resp_bd, mp_req->mp_resp_bd_dma); 423 mp_req->mp_resp_bd = NULL; 424 } 425 if (mp_req->req_buf) { 426 dma_free_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE, 427 mp_req->req_buf, mp_req->req_buf_dma); 428 mp_req->req_buf = NULL; 429 } 430 if (mp_req->resp_buf) { 431 dma_free_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE, 432 mp_req->resp_buf, mp_req->resp_buf_dma); 433 mp_req->resp_buf = NULL; 434 } 435 } 436 437 void qedf_release_cmd(struct kref *ref) 438 { 439 struct qedf_ioreq *io_req = 440 container_of(ref, struct qedf_ioreq, refcount); 441 struct qedf_cmd_mgr *cmd_mgr = io_req->cmd_mgr; 442 struct qedf_rport *fcport = io_req->fcport; 443 unsigned long flags; 444 445 if (io_req->cmd_type == QEDF_SCSI_CMD) { 446 QEDF_WARN(&fcport->qedf->dbg_ctx, 447 "Cmd released called without scsi_done called, io_req %p xid=0x%x.\n", 448 io_req, io_req->xid); 449 WARN_ON(io_req->sc_cmd); 450 } 451 452 if (io_req->cmd_type == QEDF_ELS || 453 io_req->cmd_type == QEDF_TASK_MGMT_CMD) 454 qedf_free_mp_resc(io_req); 455 456 atomic_inc(&cmd_mgr->free_list_cnt); 457 atomic_dec(&fcport->num_active_ios); 458 atomic_set(&io_req->state, QEDF_CMD_ST_INACTIVE); 459 if (atomic_read(&fcport->num_active_ios) < 0) { 460 QEDF_WARN(&(fcport->qedf->dbg_ctx), "active_ios < 0.\n"); 461 WARN_ON(1); 462 } 463 464 /* Increment task retry identifier now that the request is released */ 465 io_req->task_retry_identifier++; 466 io_req->fcport = NULL; 467 468 clear_bit(QEDF_CMD_DIRTY, &io_req->flags); 469 io_req->cpu = 0; 470 spin_lock_irqsave(&cmd_mgr->lock, flags); 471 io_req->fcport = NULL; 472 io_req->alloc = 0; 473 spin_unlock_irqrestore(&cmd_mgr->lock, flags); 474 } 475 476 static int qedf_map_sg(struct qedf_ioreq *io_req) 477 { 478 struct scsi_cmnd *sc = io_req->sc_cmd; 479 struct Scsi_Host *host = sc->device->host; 480 struct fc_lport *lport = shost_priv(host); 481 struct qedf_ctx *qedf = lport_priv(lport); 482 struct scsi_sge *bd = io_req->bd_tbl->bd_tbl; 483 struct scatterlist *sg; 484 int byte_count = 0; 485 int sg_count = 0; 486 int bd_count = 0; 487 u32 sg_len; 488 u64 addr; 489 int i = 0; 490 491 sg_count = dma_map_sg(&qedf->pdev->dev, scsi_sglist(sc), 492 scsi_sg_count(sc), sc->sc_data_direction); 493 sg = scsi_sglist(sc); 494 495 io_req->sge_type = QEDF_IOREQ_UNKNOWN_SGE; 496 497 if (sg_count <= 8 || io_req->io_req_flags == QEDF_READ) 498 io_req->sge_type = QEDF_IOREQ_FAST_SGE; 499 500 scsi_for_each_sg(sc, sg, sg_count, i) { 501 sg_len = (u32)sg_dma_len(sg); 502 addr = (u64)sg_dma_address(sg); 503 504 /* 505 * Intermediate s/g element so check if start address 506 * is page aligned. Only required for writes and only if the 507 * number of scatter/gather elements is 8 or more. 508 */ 509 if (io_req->sge_type == QEDF_IOREQ_UNKNOWN_SGE && (i) && 510 (i != (sg_count - 1)) && sg_len < QEDF_PAGE_SIZE) 511 io_req->sge_type = QEDF_IOREQ_SLOW_SGE; 512 513 bd[bd_count].sge_addr.lo = cpu_to_le32(U64_LO(addr)); 514 bd[bd_count].sge_addr.hi = cpu_to_le32(U64_HI(addr)); 515 bd[bd_count].sge_len = cpu_to_le32(sg_len); 516 517 bd_count++; 518 byte_count += sg_len; 519 } 520 521 /* To catch a case where FAST and SLOW nothing is set, set FAST */ 522 if (io_req->sge_type == QEDF_IOREQ_UNKNOWN_SGE) 523 io_req->sge_type = QEDF_IOREQ_FAST_SGE; 524 525 if (byte_count != scsi_bufflen(sc)) 526 QEDF_ERR(&(qedf->dbg_ctx), "byte_count = %d != " 527 "scsi_bufflen = %d, task_id = 0x%x.\n", byte_count, 528 scsi_bufflen(sc), io_req->xid); 529 530 return bd_count; 531 } 532 533 static int qedf_build_bd_list_from_sg(struct qedf_ioreq *io_req) 534 { 535 struct scsi_cmnd *sc = io_req->sc_cmd; 536 struct scsi_sge *bd = io_req->bd_tbl->bd_tbl; 537 int bd_count; 538 539 if (scsi_sg_count(sc)) { 540 bd_count = qedf_map_sg(io_req); 541 if (bd_count == 0) 542 return -ENOMEM; 543 } else { 544 bd_count = 0; 545 bd[0].sge_addr.lo = bd[0].sge_addr.hi = 0; 546 bd[0].sge_len = 0; 547 } 548 io_req->bd_tbl->bd_valid = bd_count; 549 550 return 0; 551 } 552 553 static void qedf_build_fcp_cmnd(struct qedf_ioreq *io_req, 554 struct fcp_cmnd *fcp_cmnd) 555 { 556 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 557 558 /* fcp_cmnd is 32 bytes */ 559 memset(fcp_cmnd, 0, FCP_CMND_LEN); 560 561 /* 8 bytes: SCSI LUN info */ 562 int_to_scsilun(sc_cmd->device->lun, 563 (struct scsi_lun *)&fcp_cmnd->fc_lun); 564 565 /* 4 bytes: flag info */ 566 fcp_cmnd->fc_pri_ta = 0; 567 fcp_cmnd->fc_tm_flags = io_req->tm_flags; 568 fcp_cmnd->fc_flags = io_req->io_req_flags; 569 fcp_cmnd->fc_cmdref = 0; 570 571 /* Populate data direction */ 572 if (io_req->cmd_type == QEDF_TASK_MGMT_CMD) { 573 fcp_cmnd->fc_flags |= FCP_CFL_RDDATA; 574 } else { 575 if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) 576 fcp_cmnd->fc_flags |= FCP_CFL_WRDATA; 577 else if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) 578 fcp_cmnd->fc_flags |= FCP_CFL_RDDATA; 579 } 580 581 fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE; 582 583 /* 16 bytes: CDB information */ 584 if (io_req->cmd_type != QEDF_TASK_MGMT_CMD) 585 memcpy(fcp_cmnd->fc_cdb, sc_cmd->cmnd, sc_cmd->cmd_len); 586 587 /* 4 bytes: FCP data length */ 588 fcp_cmnd->fc_dl = htonl(io_req->data_xfer_len); 589 } 590 591 static void qedf_init_task(struct qedf_rport *fcport, struct fc_lport *lport, 592 struct qedf_ioreq *io_req, struct e4_fcoe_task_context *task_ctx, 593 struct fcoe_wqe *sqe) 594 { 595 enum fcoe_task_type task_type; 596 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 597 struct io_bdt *bd_tbl = io_req->bd_tbl; 598 u8 fcp_cmnd[32]; 599 u32 tmp_fcp_cmnd[8]; 600 int bd_count = 0; 601 struct qedf_ctx *qedf = fcport->qedf; 602 uint16_t cq_idx = smp_processor_id() % qedf->num_queues; 603 struct regpair sense_data_buffer_phys_addr; 604 u32 tx_io_size = 0; 605 u32 rx_io_size = 0; 606 int i, cnt; 607 608 /* Note init_initiator_rw_fcoe_task memsets the task context */ 609 io_req->task = task_ctx; 610 memset(task_ctx, 0, sizeof(struct e4_fcoe_task_context)); 611 memset(io_req->task_params, 0, sizeof(struct fcoe_task_params)); 612 memset(io_req->sgl_task_params, 0, sizeof(struct scsi_sgl_task_params)); 613 614 /* Set task type bassed on DMA directio of command */ 615 if (io_req->cmd_type == QEDF_TASK_MGMT_CMD) { 616 task_type = FCOE_TASK_TYPE_READ_INITIATOR; 617 } else { 618 if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { 619 task_type = FCOE_TASK_TYPE_WRITE_INITIATOR; 620 tx_io_size = io_req->data_xfer_len; 621 } else { 622 task_type = FCOE_TASK_TYPE_READ_INITIATOR; 623 rx_io_size = io_req->data_xfer_len; 624 } 625 } 626 627 /* Setup the fields for fcoe_task_params */ 628 io_req->task_params->context = task_ctx; 629 io_req->task_params->sqe = sqe; 630 io_req->task_params->task_type = task_type; 631 io_req->task_params->tx_io_size = tx_io_size; 632 io_req->task_params->rx_io_size = rx_io_size; 633 io_req->task_params->conn_cid = fcport->fw_cid; 634 io_req->task_params->itid = io_req->xid; 635 io_req->task_params->cq_rss_number = cq_idx; 636 io_req->task_params->is_tape_device = fcport->dev_type; 637 638 /* Fill in information for scatter/gather list */ 639 if (io_req->cmd_type != QEDF_TASK_MGMT_CMD) { 640 bd_count = bd_tbl->bd_valid; 641 io_req->sgl_task_params->sgl = bd_tbl->bd_tbl; 642 io_req->sgl_task_params->sgl_phys_addr.lo = 643 U64_LO(bd_tbl->bd_tbl_dma); 644 io_req->sgl_task_params->sgl_phys_addr.hi = 645 U64_HI(bd_tbl->bd_tbl_dma); 646 io_req->sgl_task_params->num_sges = bd_count; 647 io_req->sgl_task_params->total_buffer_size = 648 scsi_bufflen(io_req->sc_cmd); 649 if (io_req->sge_type == QEDF_IOREQ_SLOW_SGE) 650 io_req->sgl_task_params->small_mid_sge = 1; 651 else 652 io_req->sgl_task_params->small_mid_sge = 0; 653 } 654 655 /* Fill in physical address of sense buffer */ 656 sense_data_buffer_phys_addr.lo = U64_LO(io_req->sense_buffer_dma); 657 sense_data_buffer_phys_addr.hi = U64_HI(io_req->sense_buffer_dma); 658 659 /* fill FCP_CMND IU */ 660 qedf_build_fcp_cmnd(io_req, (struct fcp_cmnd *)tmp_fcp_cmnd); 661 662 /* Swap fcp_cmnd since FC is big endian */ 663 cnt = sizeof(struct fcp_cmnd) / sizeof(u32); 664 for (i = 0; i < cnt; i++) { 665 tmp_fcp_cmnd[i] = cpu_to_be32(tmp_fcp_cmnd[i]); 666 } 667 memcpy(fcp_cmnd, tmp_fcp_cmnd, sizeof(struct fcp_cmnd)); 668 669 init_initiator_rw_fcoe_task(io_req->task_params, 670 io_req->sgl_task_params, 671 sense_data_buffer_phys_addr, 672 io_req->task_retry_identifier, fcp_cmnd); 673 674 /* Increment SGL type counters */ 675 if (io_req->sge_type == QEDF_IOREQ_SLOW_SGE) 676 qedf->slow_sge_ios++; 677 else 678 qedf->fast_sge_ios++; 679 } 680 681 void qedf_init_mp_task(struct qedf_ioreq *io_req, 682 struct e4_fcoe_task_context *task_ctx, struct fcoe_wqe *sqe) 683 { 684 struct qedf_mp_req *mp_req = &(io_req->mp_req); 685 struct qedf_rport *fcport = io_req->fcport; 686 struct qedf_ctx *qedf = io_req->fcport->qedf; 687 struct fc_frame_header *fc_hdr; 688 struct fcoe_tx_mid_path_params task_fc_hdr; 689 struct scsi_sgl_task_params tx_sgl_task_params; 690 struct scsi_sgl_task_params rx_sgl_task_params; 691 692 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, 693 "Initializing MP task for cmd_type=%d\n", 694 io_req->cmd_type); 695 696 qedf->control_requests++; 697 698 memset(&tx_sgl_task_params, 0, sizeof(struct scsi_sgl_task_params)); 699 memset(&rx_sgl_task_params, 0, sizeof(struct scsi_sgl_task_params)); 700 memset(task_ctx, 0, sizeof(struct e4_fcoe_task_context)); 701 memset(&task_fc_hdr, 0, sizeof(struct fcoe_tx_mid_path_params)); 702 703 /* Setup the task from io_req for easy reference */ 704 io_req->task = task_ctx; 705 706 /* Setup the fields for fcoe_task_params */ 707 io_req->task_params->context = task_ctx; 708 io_req->task_params->sqe = sqe; 709 io_req->task_params->task_type = FCOE_TASK_TYPE_MIDPATH; 710 io_req->task_params->tx_io_size = io_req->data_xfer_len; 711 /* rx_io_size tells the f/w how large a response buffer we have */ 712 io_req->task_params->rx_io_size = PAGE_SIZE; 713 io_req->task_params->conn_cid = fcport->fw_cid; 714 io_req->task_params->itid = io_req->xid; 715 /* Return middle path commands on CQ 0 */ 716 io_req->task_params->cq_rss_number = 0; 717 io_req->task_params->is_tape_device = fcport->dev_type; 718 719 fc_hdr = &(mp_req->req_fc_hdr); 720 /* Set OX_ID and RX_ID based on driver task id */ 721 fc_hdr->fh_ox_id = io_req->xid; 722 fc_hdr->fh_rx_id = htons(0xffff); 723 724 /* Set up FC header information */ 725 task_fc_hdr.parameter = fc_hdr->fh_parm_offset; 726 task_fc_hdr.r_ctl = fc_hdr->fh_r_ctl; 727 task_fc_hdr.type = fc_hdr->fh_type; 728 task_fc_hdr.cs_ctl = fc_hdr->fh_cs_ctl; 729 task_fc_hdr.df_ctl = fc_hdr->fh_df_ctl; 730 task_fc_hdr.rx_id = fc_hdr->fh_rx_id; 731 task_fc_hdr.ox_id = fc_hdr->fh_ox_id; 732 733 /* Set up s/g list parameters for request buffer */ 734 tx_sgl_task_params.sgl = mp_req->mp_req_bd; 735 tx_sgl_task_params.sgl_phys_addr.lo = U64_LO(mp_req->mp_req_bd_dma); 736 tx_sgl_task_params.sgl_phys_addr.hi = U64_HI(mp_req->mp_req_bd_dma); 737 tx_sgl_task_params.num_sges = 1; 738 /* Set PAGE_SIZE for now since sg element is that size ??? */ 739 tx_sgl_task_params.total_buffer_size = io_req->data_xfer_len; 740 tx_sgl_task_params.small_mid_sge = 0; 741 742 /* Set up s/g list parameters for request buffer */ 743 rx_sgl_task_params.sgl = mp_req->mp_resp_bd; 744 rx_sgl_task_params.sgl_phys_addr.lo = U64_LO(mp_req->mp_resp_bd_dma); 745 rx_sgl_task_params.sgl_phys_addr.hi = U64_HI(mp_req->mp_resp_bd_dma); 746 rx_sgl_task_params.num_sges = 1; 747 /* Set PAGE_SIZE for now since sg element is that size ??? */ 748 rx_sgl_task_params.total_buffer_size = PAGE_SIZE; 749 rx_sgl_task_params.small_mid_sge = 0; 750 751 752 /* 753 * Last arg is 0 as previous code did not set that we wanted the 754 * fc header information. 755 */ 756 init_initiator_midpath_unsolicited_fcoe_task(io_req->task_params, 757 &task_fc_hdr, 758 &tx_sgl_task_params, 759 &rx_sgl_task_params, 0); 760 } 761 762 /* Presumed that fcport->rport_lock is held */ 763 u16 qedf_get_sqe_idx(struct qedf_rport *fcport) 764 { 765 uint16_t total_sqe = (fcport->sq_mem_size)/(sizeof(struct fcoe_wqe)); 766 u16 rval; 767 768 rval = fcport->sq_prod_idx; 769 770 /* Adjust ring index */ 771 fcport->sq_prod_idx++; 772 fcport->fw_sq_prod_idx++; 773 if (fcport->sq_prod_idx == total_sqe) 774 fcport->sq_prod_idx = 0; 775 776 return rval; 777 } 778 779 void qedf_ring_doorbell(struct qedf_rport *fcport) 780 { 781 struct fcoe_db_data dbell = { 0 }; 782 783 dbell.agg_flags = 0; 784 785 dbell.params |= DB_DEST_XCM << FCOE_DB_DATA_DEST_SHIFT; 786 dbell.params |= DB_AGG_CMD_SET << FCOE_DB_DATA_AGG_CMD_SHIFT; 787 dbell.params |= DQ_XCM_FCOE_SQ_PROD_CMD << 788 FCOE_DB_DATA_AGG_VAL_SEL_SHIFT; 789 790 dbell.sq_prod = fcport->fw_sq_prod_idx; 791 /* wmb makes sure that the BDs data is updated before updating the 792 * producer, otherwise FW may read old data from the BDs. 793 */ 794 wmb(); 795 barrier(); 796 writel(*(u32 *)&dbell, fcport->p_doorbell); 797 /* 798 * Fence required to flush the write combined buffer, since another 799 * CPU may write to the same doorbell address and data may be lost 800 * due to relaxed order nature of write combined bar. 801 */ 802 wmb(); 803 } 804 805 static void qedf_trace_io(struct qedf_rport *fcport, struct qedf_ioreq *io_req, 806 int8_t direction) 807 { 808 struct qedf_ctx *qedf = fcport->qedf; 809 struct qedf_io_log *io_log; 810 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 811 unsigned long flags; 812 uint8_t op; 813 814 spin_lock_irqsave(&qedf->io_trace_lock, flags); 815 816 io_log = &qedf->io_trace_buf[qedf->io_trace_idx]; 817 io_log->direction = direction; 818 io_log->task_id = io_req->xid; 819 io_log->port_id = fcport->rdata->ids.port_id; 820 io_log->lun = sc_cmd->device->lun; 821 io_log->op = op = sc_cmd->cmnd[0]; 822 io_log->lba[0] = sc_cmd->cmnd[2]; 823 io_log->lba[1] = sc_cmd->cmnd[3]; 824 io_log->lba[2] = sc_cmd->cmnd[4]; 825 io_log->lba[3] = sc_cmd->cmnd[5]; 826 io_log->bufflen = scsi_bufflen(sc_cmd); 827 io_log->sg_count = scsi_sg_count(sc_cmd); 828 io_log->result = sc_cmd->result; 829 io_log->jiffies = jiffies; 830 io_log->refcount = kref_read(&io_req->refcount); 831 832 if (direction == QEDF_IO_TRACE_REQ) { 833 /* For requests we only care abot the submission CPU */ 834 io_log->req_cpu = io_req->cpu; 835 io_log->int_cpu = 0; 836 io_log->rsp_cpu = 0; 837 } else if (direction == QEDF_IO_TRACE_RSP) { 838 io_log->req_cpu = io_req->cpu; 839 io_log->int_cpu = io_req->int_cpu; 840 io_log->rsp_cpu = smp_processor_id(); 841 } 842 843 io_log->sge_type = io_req->sge_type; 844 845 qedf->io_trace_idx++; 846 if (qedf->io_trace_idx == QEDF_IO_TRACE_SIZE) 847 qedf->io_trace_idx = 0; 848 849 spin_unlock_irqrestore(&qedf->io_trace_lock, flags); 850 } 851 852 int qedf_post_io_req(struct qedf_rport *fcport, struct qedf_ioreq *io_req) 853 { 854 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 855 struct Scsi_Host *host = sc_cmd->device->host; 856 struct fc_lport *lport = shost_priv(host); 857 struct qedf_ctx *qedf = lport_priv(lport); 858 struct e4_fcoe_task_context *task_ctx; 859 u16 xid; 860 struct fcoe_wqe *sqe; 861 u16 sqe_idx; 862 863 /* Initialize rest of io_req fileds */ 864 io_req->data_xfer_len = scsi_bufflen(sc_cmd); 865 sc_cmd->SCp.ptr = (char *)io_req; 866 io_req->sge_type = QEDF_IOREQ_FAST_SGE; /* Assume fast SGL by default */ 867 868 /* Record which cpu this request is associated with */ 869 io_req->cpu = smp_processor_id(); 870 871 if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) { 872 io_req->io_req_flags = QEDF_READ; 873 qedf->input_requests++; 874 } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { 875 io_req->io_req_flags = QEDF_WRITE; 876 qedf->output_requests++; 877 } else { 878 io_req->io_req_flags = 0; 879 qedf->control_requests++; 880 } 881 882 xid = io_req->xid; 883 884 /* Build buffer descriptor list for firmware from sg list */ 885 if (qedf_build_bd_list_from_sg(io_req)) { 886 QEDF_ERR(&(qedf->dbg_ctx), "BD list creation failed.\n"); 887 /* Release cmd will release io_req, but sc_cmd is assigned */ 888 io_req->sc_cmd = NULL; 889 kref_put(&io_req->refcount, qedf_release_cmd); 890 return -EAGAIN; 891 } 892 893 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) || 894 test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 895 QEDF_ERR(&(qedf->dbg_ctx), "Session not offloaded yet.\n"); 896 /* Release cmd will release io_req, but sc_cmd is assigned */ 897 io_req->sc_cmd = NULL; 898 kref_put(&io_req->refcount, qedf_release_cmd); 899 return -EINVAL; 900 } 901 902 /* Record LUN number for later use if we neeed them */ 903 io_req->lun = (int)sc_cmd->device->lun; 904 905 /* Obtain free SQE */ 906 sqe_idx = qedf_get_sqe_idx(fcport); 907 sqe = &fcport->sq[sqe_idx]; 908 memset(sqe, 0, sizeof(struct fcoe_wqe)); 909 910 /* Get the task context */ 911 task_ctx = qedf_get_task_mem(&qedf->tasks, xid); 912 if (!task_ctx) { 913 QEDF_WARN(&(qedf->dbg_ctx), "task_ctx is NULL, xid=%d.\n", 914 xid); 915 /* Release cmd will release io_req, but sc_cmd is assigned */ 916 io_req->sc_cmd = NULL; 917 kref_put(&io_req->refcount, qedf_release_cmd); 918 return -EINVAL; 919 } 920 921 qedf_init_task(fcport, lport, io_req, task_ctx, sqe); 922 923 /* Ring doorbell */ 924 qedf_ring_doorbell(fcport); 925 926 /* Set that command is with the firmware now */ 927 set_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 928 929 if (qedf_io_tracing && io_req->sc_cmd) 930 qedf_trace_io(fcport, io_req, QEDF_IO_TRACE_REQ); 931 932 return false; 933 } 934 935 int 936 qedf_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc_cmd) 937 { 938 struct fc_lport *lport = shost_priv(host); 939 struct qedf_ctx *qedf = lport_priv(lport); 940 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 941 struct fc_rport_libfc_priv *rp = rport->dd_data; 942 struct qedf_rport *fcport; 943 struct qedf_ioreq *io_req; 944 int rc = 0; 945 int rval; 946 unsigned long flags = 0; 947 int num_sgs = 0; 948 949 num_sgs = scsi_sg_count(sc_cmd); 950 if (scsi_sg_count(sc_cmd) > QEDF_MAX_BDS_PER_CMD) { 951 QEDF_ERR(&qedf->dbg_ctx, 952 "Number of SG elements %d exceeds what hardware limitation of %d.\n", 953 num_sgs, QEDF_MAX_BDS_PER_CMD); 954 sc_cmd->result = DID_ERROR; 955 sc_cmd->scsi_done(sc_cmd); 956 return 0; 957 } 958 959 if (test_bit(QEDF_UNLOADING, &qedf->flags) || 960 test_bit(QEDF_DBG_STOP_IO, &qedf->flags)) { 961 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 962 "Returning DNC as unloading or stop io, flags 0x%lx.\n", 963 qedf->flags); 964 sc_cmd->result = DID_NO_CONNECT << 16; 965 sc_cmd->scsi_done(sc_cmd); 966 return 0; 967 } 968 969 if (!qedf->pdev->msix_enabled) { 970 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 971 "Completing sc_cmd=%p DID_NO_CONNECT as MSI-X is not enabled.\n", 972 sc_cmd); 973 sc_cmd->result = DID_NO_CONNECT << 16; 974 sc_cmd->scsi_done(sc_cmd); 975 return 0; 976 } 977 978 rval = fc_remote_port_chkready(rport); 979 if (rval) { 980 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 981 "fc_remote_port_chkready failed=0x%x for port_id=0x%06x.\n", 982 rval, rport->port_id); 983 sc_cmd->result = rval; 984 sc_cmd->scsi_done(sc_cmd); 985 return 0; 986 } 987 988 /* Retry command if we are doing a qed drain operation */ 989 if (test_bit(QEDF_DRAIN_ACTIVE, &qedf->flags)) { 990 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Drain active.\n"); 991 rc = SCSI_MLQUEUE_HOST_BUSY; 992 goto exit_qcmd; 993 } 994 995 if (lport->state != LPORT_ST_READY || 996 atomic_read(&qedf->link_state) != QEDF_LINK_UP) { 997 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Link down.\n"); 998 rc = SCSI_MLQUEUE_HOST_BUSY; 999 goto exit_qcmd; 1000 } 1001 1002 /* rport and tgt are allocated together, so tgt should be non-NULL */ 1003 fcport = (struct qedf_rport *)&rp[1]; 1004 1005 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) || 1006 test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 1007 /* 1008 * Session is not offloaded yet. Let SCSI-ml retry 1009 * the command. 1010 */ 1011 rc = SCSI_MLQUEUE_TARGET_BUSY; 1012 goto exit_qcmd; 1013 } 1014 1015 atomic_inc(&fcport->ios_to_queue); 1016 1017 if (fcport->retry_delay_timestamp) { 1018 /* Take fcport->rport_lock for resetting the delay_timestamp */ 1019 spin_lock_irqsave(&fcport->rport_lock, flags); 1020 if (time_after(jiffies, fcport->retry_delay_timestamp)) { 1021 fcport->retry_delay_timestamp = 0; 1022 } else { 1023 spin_unlock_irqrestore(&fcport->rport_lock, flags); 1024 /* If retry_delay timer is active, flow off the ML */ 1025 rc = SCSI_MLQUEUE_TARGET_BUSY; 1026 atomic_dec(&fcport->ios_to_queue); 1027 goto exit_qcmd; 1028 } 1029 spin_unlock_irqrestore(&fcport->rport_lock, flags); 1030 } 1031 1032 io_req = qedf_alloc_cmd(fcport, QEDF_SCSI_CMD); 1033 if (!io_req) { 1034 rc = SCSI_MLQUEUE_HOST_BUSY; 1035 atomic_dec(&fcport->ios_to_queue); 1036 goto exit_qcmd; 1037 } 1038 1039 io_req->sc_cmd = sc_cmd; 1040 1041 /* Take fcport->rport_lock for posting to fcport send queue */ 1042 spin_lock_irqsave(&fcport->rport_lock, flags); 1043 if (qedf_post_io_req(fcport, io_req)) { 1044 QEDF_WARN(&(qedf->dbg_ctx), "Unable to post io_req\n"); 1045 /* Return SQE to pool */ 1046 atomic_inc(&fcport->free_sqes); 1047 rc = SCSI_MLQUEUE_HOST_BUSY; 1048 } 1049 spin_unlock_irqrestore(&fcport->rport_lock, flags); 1050 atomic_dec(&fcport->ios_to_queue); 1051 1052 exit_qcmd: 1053 return rc; 1054 } 1055 1056 static void qedf_parse_fcp_rsp(struct qedf_ioreq *io_req, 1057 struct fcoe_cqe_rsp_info *fcp_rsp) 1058 { 1059 struct scsi_cmnd *sc_cmd = io_req->sc_cmd; 1060 struct qedf_ctx *qedf = io_req->fcport->qedf; 1061 u8 rsp_flags = fcp_rsp->rsp_flags.flags; 1062 int fcp_sns_len = 0; 1063 int fcp_rsp_len = 0; 1064 uint8_t *rsp_info, *sense_data; 1065 1066 io_req->fcp_status = FC_GOOD; 1067 io_req->fcp_resid = 0; 1068 if (rsp_flags & (FCOE_FCP_RSP_FLAGS_FCP_RESID_OVER | 1069 FCOE_FCP_RSP_FLAGS_FCP_RESID_UNDER)) 1070 io_req->fcp_resid = fcp_rsp->fcp_resid; 1071 1072 io_req->scsi_comp_flags = rsp_flags; 1073 CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status = 1074 fcp_rsp->scsi_status_code; 1075 1076 if (rsp_flags & 1077 FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) 1078 fcp_rsp_len = fcp_rsp->fcp_rsp_len; 1079 1080 if (rsp_flags & 1081 FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) 1082 fcp_sns_len = fcp_rsp->fcp_sns_len; 1083 1084 io_req->fcp_rsp_len = fcp_rsp_len; 1085 io_req->fcp_sns_len = fcp_sns_len; 1086 rsp_info = sense_data = io_req->sense_buffer; 1087 1088 /* fetch fcp_rsp_code */ 1089 if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) { 1090 /* Only for task management function */ 1091 io_req->fcp_rsp_code = rsp_info[3]; 1092 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1093 "fcp_rsp_code = %d\n", io_req->fcp_rsp_code); 1094 /* Adjust sense-data location. */ 1095 sense_data += fcp_rsp_len; 1096 } 1097 1098 if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) { 1099 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1100 "Truncating sense buffer\n"); 1101 fcp_sns_len = SCSI_SENSE_BUFFERSIZE; 1102 } 1103 1104 /* The sense buffer can be NULL for TMF commands */ 1105 if (sc_cmd->sense_buffer) { 1106 memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1107 if (fcp_sns_len) 1108 memcpy(sc_cmd->sense_buffer, sense_data, 1109 fcp_sns_len); 1110 } 1111 } 1112 1113 static void qedf_unmap_sg_list(struct qedf_ctx *qedf, struct qedf_ioreq *io_req) 1114 { 1115 struct scsi_cmnd *sc = io_req->sc_cmd; 1116 1117 if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) { 1118 dma_unmap_sg(&qedf->pdev->dev, scsi_sglist(sc), 1119 scsi_sg_count(sc), sc->sc_data_direction); 1120 io_req->bd_tbl->bd_valid = 0; 1121 } 1122 } 1123 1124 void qedf_scsi_completion(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1125 struct qedf_ioreq *io_req) 1126 { 1127 struct scsi_cmnd *sc_cmd; 1128 struct fcoe_cqe_rsp_info *fcp_rsp; 1129 struct qedf_rport *fcport; 1130 int refcount; 1131 u16 scope, qualifier = 0; 1132 u8 fw_residual_flag = 0; 1133 unsigned long flags = 0; 1134 u16 chk_scope = 0; 1135 1136 if (!io_req) 1137 return; 1138 if (!cqe) 1139 return; 1140 1141 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || 1142 test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags) || 1143 test_bit(QEDF_CMD_IN_ABORT, &io_req->flags)) { 1144 QEDF_ERR(&qedf->dbg_ctx, 1145 "io_req xid=0x%x already in cleanup or abort processing or already completed.\n", 1146 io_req->xid); 1147 return; 1148 } 1149 1150 sc_cmd = io_req->sc_cmd; 1151 fcp_rsp = &cqe->cqe_info.rsp_info; 1152 1153 if (!sc_cmd) { 1154 QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd is NULL!\n"); 1155 return; 1156 } 1157 1158 if (!sc_cmd->SCp.ptr) { 1159 QEDF_WARN(&(qedf->dbg_ctx), "SCp.ptr is NULL, returned in " 1160 "another context.\n"); 1161 return; 1162 } 1163 1164 if (!sc_cmd->device) { 1165 QEDF_ERR(&qedf->dbg_ctx, 1166 "Device for sc_cmd %p is NULL.\n", sc_cmd); 1167 return; 1168 } 1169 1170 if (!sc_cmd->request) { 1171 QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd->request is NULL, " 1172 "sc_cmd=%p.\n", sc_cmd); 1173 return; 1174 } 1175 1176 if (!sc_cmd->request->q) { 1177 QEDF_WARN(&(qedf->dbg_ctx), "request->q is NULL so request " 1178 "is not valid, sc_cmd=%p.\n", sc_cmd); 1179 return; 1180 } 1181 1182 fcport = io_req->fcport; 1183 1184 /* 1185 * When flush is active, let the cmds be completed from the cleanup 1186 * context 1187 */ 1188 if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags) || 1189 (test_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags) && 1190 sc_cmd->device->lun == (u64)fcport->lun_reset_lun)) { 1191 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1192 "Dropping good completion xid=0x%x as fcport is flushing", 1193 io_req->xid); 1194 return; 1195 } 1196 1197 qedf_parse_fcp_rsp(io_req, fcp_rsp); 1198 1199 qedf_unmap_sg_list(qedf, io_req); 1200 1201 /* Check for FCP transport error */ 1202 if (io_req->fcp_rsp_len > 3 && io_req->fcp_rsp_code) { 1203 QEDF_ERR(&(qedf->dbg_ctx), 1204 "FCP I/O protocol failure xid=0x%x fcp_rsp_len=%d " 1205 "fcp_rsp_code=%d.\n", io_req->xid, io_req->fcp_rsp_len, 1206 io_req->fcp_rsp_code); 1207 sc_cmd->result = DID_BUS_BUSY << 16; 1208 goto out; 1209 } 1210 1211 fw_residual_flag = GET_FIELD(cqe->cqe_info.rsp_info.fw_error_flags, 1212 FCOE_CQE_RSP_INFO_FW_UNDERRUN); 1213 if (fw_residual_flag) { 1214 QEDF_ERR(&qedf->dbg_ctx, 1215 "Firmware detected underrun: xid=0x%x fcp_rsp.flags=0x%02x fcp_resid=%d fw_residual=0x%x lba=%02x%02x%02x%02x.\n", 1216 io_req->xid, fcp_rsp->rsp_flags.flags, 1217 io_req->fcp_resid, 1218 cqe->cqe_info.rsp_info.fw_residual, sc_cmd->cmnd[2], 1219 sc_cmd->cmnd[3], sc_cmd->cmnd[4], sc_cmd->cmnd[5]); 1220 1221 if (io_req->cdb_status == 0) 1222 sc_cmd->result = (DID_ERROR << 16) | io_req->cdb_status; 1223 else 1224 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1225 1226 /* 1227 * Set resid to the whole buffer length so we won't try to resue 1228 * any previously data. 1229 */ 1230 scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); 1231 goto out; 1232 } 1233 1234 switch (io_req->fcp_status) { 1235 case FC_GOOD: 1236 if (io_req->cdb_status == 0) { 1237 /* Good I/O completion */ 1238 sc_cmd->result = DID_OK << 16; 1239 } else { 1240 refcount = kref_read(&io_req->refcount); 1241 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1242 "%d:0:%d:%lld xid=0x%0x op=0x%02x " 1243 "lba=%02x%02x%02x%02x cdb_status=%d " 1244 "fcp_resid=0x%x refcount=%d.\n", 1245 qedf->lport->host->host_no, sc_cmd->device->id, 1246 sc_cmd->device->lun, io_req->xid, 1247 sc_cmd->cmnd[0], sc_cmd->cmnd[2], sc_cmd->cmnd[3], 1248 sc_cmd->cmnd[4], sc_cmd->cmnd[5], 1249 io_req->cdb_status, io_req->fcp_resid, 1250 refcount); 1251 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1252 1253 if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL || 1254 io_req->cdb_status == SAM_STAT_BUSY) { 1255 /* 1256 * Check whether we need to set retry_delay at 1257 * all based on retry_delay module parameter 1258 * and the status qualifier. 1259 */ 1260 1261 /* Upper 2 bits */ 1262 scope = fcp_rsp->retry_delay_timer & 0xC000; 1263 /* Lower 14 bits */ 1264 qualifier = fcp_rsp->retry_delay_timer & 0x3FFF; 1265 1266 if (qedf_retry_delay) 1267 chk_scope = 1; 1268 /* Record stats */ 1269 if (io_req->cdb_status == 1270 SAM_STAT_TASK_SET_FULL) 1271 qedf->task_set_fulls++; 1272 else 1273 qedf->busy++; 1274 } 1275 } 1276 if (io_req->fcp_resid) 1277 scsi_set_resid(sc_cmd, io_req->fcp_resid); 1278 1279 if (chk_scope == 1) { 1280 if ((scope == 1 || scope == 2) && 1281 (qualifier > 0 && qualifier <= 0x3FEF)) { 1282 /* Check we don't go over the max */ 1283 if (qualifier > QEDF_RETRY_DELAY_MAX) { 1284 qualifier = QEDF_RETRY_DELAY_MAX; 1285 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1286 "qualifier = %d\n", 1287 (fcp_rsp->retry_delay_timer & 1288 0x3FFF)); 1289 } 1290 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1291 "Scope = %d and qualifier = %d", 1292 scope, qualifier); 1293 /* Take fcport->rport_lock to 1294 * update the retry_delay_timestamp 1295 */ 1296 spin_lock_irqsave(&fcport->rport_lock, flags); 1297 fcport->retry_delay_timestamp = 1298 jiffies + (qualifier * HZ / 10); 1299 spin_unlock_irqrestore(&fcport->rport_lock, 1300 flags); 1301 1302 } else { 1303 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1304 "combination of scope = %d and qualifier = %d is not handled in qedf.\n", 1305 scope, qualifier); 1306 } 1307 } 1308 break; 1309 default: 1310 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "fcp_status=%d.\n", 1311 io_req->fcp_status); 1312 break; 1313 } 1314 1315 out: 1316 if (qedf_io_tracing) 1317 qedf_trace_io(fcport, io_req, QEDF_IO_TRACE_RSP); 1318 1319 /* 1320 * We wait till the end of the function to clear the 1321 * outstanding bit in case we need to send an abort 1322 */ 1323 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 1324 1325 io_req->sc_cmd = NULL; 1326 sc_cmd->SCp.ptr = NULL; 1327 sc_cmd->scsi_done(sc_cmd); 1328 kref_put(&io_req->refcount, qedf_release_cmd); 1329 } 1330 1331 /* Return a SCSI command in some other context besides a normal completion */ 1332 void qedf_scsi_done(struct qedf_ctx *qedf, struct qedf_ioreq *io_req, 1333 int result) 1334 { 1335 struct scsi_cmnd *sc_cmd; 1336 int refcount; 1337 1338 if (!io_req) { 1339 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "io_req is NULL\n"); 1340 return; 1341 } 1342 1343 if (test_and_set_bit(QEDF_CMD_ERR_SCSI_DONE, &io_req->flags)) { 1344 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1345 "io_req:%p scsi_done handling already done\n", 1346 io_req); 1347 return; 1348 } 1349 1350 /* 1351 * We will be done with this command after this call so clear the 1352 * outstanding bit. 1353 */ 1354 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 1355 1356 sc_cmd = io_req->sc_cmd; 1357 1358 if (!sc_cmd) { 1359 QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd is NULL!\n"); 1360 return; 1361 } 1362 1363 if (!virt_addr_valid(sc_cmd)) { 1364 QEDF_ERR(&qedf->dbg_ctx, "sc_cmd=%p is not valid.", sc_cmd); 1365 goto bad_scsi_ptr; 1366 } 1367 1368 if (!sc_cmd->SCp.ptr) { 1369 QEDF_WARN(&(qedf->dbg_ctx), "SCp.ptr is NULL, returned in " 1370 "another context.\n"); 1371 return; 1372 } 1373 1374 if (!sc_cmd->device) { 1375 QEDF_ERR(&qedf->dbg_ctx, "Device for sc_cmd %p is NULL.\n", 1376 sc_cmd); 1377 goto bad_scsi_ptr; 1378 } 1379 1380 if (!virt_addr_valid(sc_cmd->device)) { 1381 QEDF_ERR(&qedf->dbg_ctx, 1382 "Device pointer for sc_cmd %p is bad.\n", sc_cmd); 1383 goto bad_scsi_ptr; 1384 } 1385 1386 if (!sc_cmd->sense_buffer) { 1387 QEDF_ERR(&qedf->dbg_ctx, 1388 "sc_cmd->sense_buffer for sc_cmd %p is NULL.\n", 1389 sc_cmd); 1390 goto bad_scsi_ptr; 1391 } 1392 1393 if (!virt_addr_valid(sc_cmd->sense_buffer)) { 1394 QEDF_ERR(&qedf->dbg_ctx, 1395 "sc_cmd->sense_buffer for sc_cmd %p is bad.\n", 1396 sc_cmd); 1397 goto bad_scsi_ptr; 1398 } 1399 1400 if (!sc_cmd->scsi_done) { 1401 QEDF_ERR(&qedf->dbg_ctx, 1402 "sc_cmd->scsi_done for sc_cmd %p is NULL.\n", 1403 sc_cmd); 1404 goto bad_scsi_ptr; 1405 } 1406 1407 qedf_unmap_sg_list(qedf, io_req); 1408 1409 sc_cmd->result = result << 16; 1410 refcount = kref_read(&io_req->refcount); 1411 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "%d:0:%d:%lld: Completing " 1412 "sc_cmd=%p result=0x%08x op=0x%02x lba=0x%02x%02x%02x%02x, " 1413 "allowed=%d retries=%d refcount=%d.\n", 1414 qedf->lport->host->host_no, sc_cmd->device->id, 1415 sc_cmd->device->lun, sc_cmd, sc_cmd->result, sc_cmd->cmnd[0], 1416 sc_cmd->cmnd[2], sc_cmd->cmnd[3], sc_cmd->cmnd[4], 1417 sc_cmd->cmnd[5], sc_cmd->allowed, sc_cmd->retries, 1418 refcount); 1419 1420 /* 1421 * Set resid to the whole buffer length so we won't try to resue any 1422 * previously read data 1423 */ 1424 scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); 1425 1426 if (qedf_io_tracing) 1427 qedf_trace_io(io_req->fcport, io_req, QEDF_IO_TRACE_RSP); 1428 1429 io_req->sc_cmd = NULL; 1430 sc_cmd->SCp.ptr = NULL; 1431 sc_cmd->scsi_done(sc_cmd); 1432 kref_put(&io_req->refcount, qedf_release_cmd); 1433 return; 1434 1435 bad_scsi_ptr: 1436 /* 1437 * Clear the io_req->sc_cmd backpointer so we don't try to process 1438 * this again 1439 */ 1440 io_req->sc_cmd = NULL; 1441 kref_put(&io_req->refcount, qedf_release_cmd); /* ID: 001 */ 1442 } 1443 1444 /* 1445 * Handle warning type CQE completions. This is mainly used for REC timer 1446 * popping. 1447 */ 1448 void qedf_process_warning_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1449 struct qedf_ioreq *io_req) 1450 { 1451 int rval, i; 1452 struct qedf_rport *fcport = io_req->fcport; 1453 u64 err_warn_bit_map; 1454 u8 err_warn = 0xff; 1455 1456 if (!cqe) { 1457 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1458 "cqe is NULL for io_req %p xid=0x%x\n", 1459 io_req, io_req->xid); 1460 return; 1461 } 1462 1463 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "Warning CQE, " 1464 "xid=0x%x\n", io_req->xid); 1465 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), 1466 "err_warn_bitmap=%08x:%08x\n", 1467 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_hi), 1468 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_lo)); 1469 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "tx_buff_off=%08x, " 1470 "rx_buff_off=%08x, rx_id=%04x\n", 1471 le32_to_cpu(cqe->cqe_info.err_info.tx_buf_off), 1472 le32_to_cpu(cqe->cqe_info.err_info.rx_buf_off), 1473 le32_to_cpu(cqe->cqe_info.err_info.rx_id)); 1474 1475 /* Normalize the error bitmap value to an just an unsigned int */ 1476 err_warn_bit_map = (u64) 1477 ((u64)cqe->cqe_info.err_info.err_warn_bitmap_hi << 32) | 1478 (u64)cqe->cqe_info.err_info.err_warn_bitmap_lo; 1479 for (i = 0; i < 64; i++) { 1480 if (err_warn_bit_map & (u64)((u64)1 << i)) { 1481 err_warn = i; 1482 break; 1483 } 1484 } 1485 1486 /* Check if REC TOV expired if this is a tape device */ 1487 if (fcport->dev_type == QEDF_RPORT_TYPE_TAPE) { 1488 if (err_warn == 1489 FCOE_WARNING_CODE_REC_TOV_TIMER_EXPIRATION) { 1490 QEDF_ERR(&(qedf->dbg_ctx), "REC timer expired.\n"); 1491 if (!test_bit(QEDF_CMD_SRR_SENT, &io_req->flags)) { 1492 io_req->rx_buf_off = 1493 cqe->cqe_info.err_info.rx_buf_off; 1494 io_req->tx_buf_off = 1495 cqe->cqe_info.err_info.tx_buf_off; 1496 io_req->rx_id = cqe->cqe_info.err_info.rx_id; 1497 rval = qedf_send_rec(io_req); 1498 /* 1499 * We only want to abort the io_req if we 1500 * can't queue the REC command as we want to 1501 * keep the exchange open for recovery. 1502 */ 1503 if (rval) 1504 goto send_abort; 1505 } 1506 return; 1507 } 1508 } 1509 1510 send_abort: 1511 init_completion(&io_req->abts_done); 1512 rval = qedf_initiate_abts(io_req, true); 1513 if (rval) 1514 QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n"); 1515 } 1516 1517 /* Cleanup a command when we receive an error detection completion */ 1518 void qedf_process_error_detect(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1519 struct qedf_ioreq *io_req) 1520 { 1521 int rval; 1522 1523 if (!cqe) { 1524 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1525 "cqe is NULL for io_req %p\n", io_req); 1526 return; 1527 } 1528 1529 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "Error detection CQE, " 1530 "xid=0x%x\n", io_req->xid); 1531 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), 1532 "err_warn_bitmap=%08x:%08x\n", 1533 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_hi), 1534 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_lo)); 1535 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "tx_buff_off=%08x, " 1536 "rx_buff_off=%08x, rx_id=%04x\n", 1537 le32_to_cpu(cqe->cqe_info.err_info.tx_buf_off), 1538 le32_to_cpu(cqe->cqe_info.err_info.rx_buf_off), 1539 le32_to_cpu(cqe->cqe_info.err_info.rx_id)); 1540 1541 if (qedf->stop_io_on_error) { 1542 qedf_stop_all_io(qedf); 1543 return; 1544 } 1545 1546 init_completion(&io_req->abts_done); 1547 rval = qedf_initiate_abts(io_req, true); 1548 if (rval) 1549 QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n"); 1550 } 1551 1552 static void qedf_flush_els_req(struct qedf_ctx *qedf, 1553 struct qedf_ioreq *els_req) 1554 { 1555 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1556 "Flushing ELS request xid=0x%x refcount=%d.\n", els_req->xid, 1557 kref_read(&els_req->refcount)); 1558 1559 /* 1560 * Need to distinguish this from a timeout when calling the 1561 * els_req->cb_func. 1562 */ 1563 els_req->event = QEDF_IOREQ_EV_ELS_FLUSH; 1564 1565 clear_bit(QEDF_CMD_OUTSTANDING, &els_req->flags); 1566 1567 /* Cancel the timer */ 1568 cancel_delayed_work_sync(&els_req->timeout_work); 1569 1570 /* Call callback function to complete command */ 1571 if (els_req->cb_func && els_req->cb_arg) { 1572 els_req->cb_func(els_req->cb_arg); 1573 els_req->cb_arg = NULL; 1574 } 1575 1576 /* Release kref for original initiate_els */ 1577 kref_put(&els_req->refcount, qedf_release_cmd); 1578 } 1579 1580 /* A value of -1 for lun is a wild card that means flush all 1581 * active SCSI I/Os for the target. 1582 */ 1583 void qedf_flush_active_ios(struct qedf_rport *fcport, int lun) 1584 { 1585 struct qedf_ioreq *io_req; 1586 struct qedf_ctx *qedf; 1587 struct qedf_cmd_mgr *cmd_mgr; 1588 int i, rc; 1589 unsigned long flags; 1590 int flush_cnt = 0; 1591 int wait_cnt = 100; 1592 int refcount = 0; 1593 1594 if (!fcport) { 1595 QEDF_ERR(NULL, "fcport is NULL\n"); 1596 return; 1597 } 1598 1599 /* Check that fcport is still offloaded */ 1600 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 1601 QEDF_ERR(NULL, "fcport is no longer offloaded.\n"); 1602 return; 1603 } 1604 1605 qedf = fcport->qedf; 1606 1607 if (!qedf) { 1608 QEDF_ERR(NULL, "qedf is NULL.\n"); 1609 return; 1610 } 1611 1612 /* Only wait for all commands to be queued in the Upload context */ 1613 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags) && 1614 (lun == -1)) { 1615 while (atomic_read(&fcport->ios_to_queue)) { 1616 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1617 "Waiting for %d I/Os to be queued\n", 1618 atomic_read(&fcport->ios_to_queue)); 1619 if (wait_cnt == 0) { 1620 QEDF_ERR(NULL, 1621 "%d IOs request could not be queued\n", 1622 atomic_read(&fcport->ios_to_queue)); 1623 } 1624 msleep(20); 1625 wait_cnt--; 1626 } 1627 } 1628 1629 cmd_mgr = qedf->cmd_mgr; 1630 1631 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1632 "Flush active i/o's num=0x%x fcport=0x%p port_id=0x%06x scsi_id=%d.\n", 1633 atomic_read(&fcport->num_active_ios), fcport, 1634 fcport->rdata->ids.port_id, fcport->rport->scsi_target_id); 1635 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Locking flush mutex.\n"); 1636 1637 mutex_lock(&qedf->flush_mutex); 1638 if (lun == -1) { 1639 set_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags); 1640 } else { 1641 set_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags); 1642 fcport->lun_reset_lun = lun; 1643 } 1644 1645 for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) { 1646 io_req = &cmd_mgr->cmds[i]; 1647 1648 if (!io_req) 1649 continue; 1650 if (!io_req->fcport) 1651 continue; 1652 1653 spin_lock_irqsave(&cmd_mgr->lock, flags); 1654 1655 if (io_req->alloc) { 1656 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags)) { 1657 if (io_req->cmd_type == QEDF_SCSI_CMD) 1658 QEDF_ERR(&qedf->dbg_ctx, 1659 "Allocated but not queued, xid=0x%x\n", 1660 io_req->xid); 1661 } 1662 spin_unlock_irqrestore(&cmd_mgr->lock, flags); 1663 } else { 1664 spin_unlock_irqrestore(&cmd_mgr->lock, flags); 1665 continue; 1666 } 1667 1668 if (io_req->fcport != fcport) 1669 continue; 1670 1671 /* In case of ABTS, CMD_OUTSTANDING is cleared on ABTS response, 1672 * but RRQ is still pending. 1673 * Workaround: Within qedf_send_rrq, we check if the fcport is 1674 * NULL, and we drop the ref on the io_req to clean it up. 1675 */ 1676 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags)) { 1677 refcount = kref_read(&io_req->refcount); 1678 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1679 "Not outstanding, xid=0x%x, cmd_type=%d refcount=%d.\n", 1680 io_req->xid, io_req->cmd_type, refcount); 1681 /* If RRQ work has been queue, try to cancel it and 1682 * free the io_req 1683 */ 1684 if (atomic_read(&io_req->state) == 1685 QEDFC_CMD_ST_RRQ_WAIT) { 1686 if (cancel_delayed_work_sync 1687 (&io_req->rrq_work)) { 1688 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1689 "Putting reference for pending RRQ work xid=0x%x.\n", 1690 io_req->xid); 1691 /* ID: 003 */ 1692 kref_put(&io_req->refcount, 1693 qedf_release_cmd); 1694 } 1695 } 1696 continue; 1697 } 1698 1699 /* Only consider flushing ELS during target reset */ 1700 if (io_req->cmd_type == QEDF_ELS && 1701 lun == -1) { 1702 rc = kref_get_unless_zero(&io_req->refcount); 1703 if (!rc) { 1704 QEDF_ERR(&(qedf->dbg_ctx), 1705 "Could not get kref for ELS io_req=0x%p xid=0x%x.\n", 1706 io_req, io_req->xid); 1707 continue; 1708 } 1709 qedf_initiate_cleanup(io_req, false); 1710 flush_cnt++; 1711 qedf_flush_els_req(qedf, io_req); 1712 1713 /* 1714 * Release the kref and go back to the top of the 1715 * loop. 1716 */ 1717 goto free_cmd; 1718 } 1719 1720 if (io_req->cmd_type == QEDF_ABTS) { 1721 /* ID: 004 */ 1722 rc = kref_get_unless_zero(&io_req->refcount); 1723 if (!rc) { 1724 QEDF_ERR(&(qedf->dbg_ctx), 1725 "Could not get kref for abort io_req=0x%p xid=0x%x.\n", 1726 io_req, io_req->xid); 1727 continue; 1728 } 1729 if (lun != -1 && io_req->lun != lun) 1730 goto free_cmd; 1731 1732 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1733 "Flushing abort xid=0x%x.\n", io_req->xid); 1734 1735 if (cancel_delayed_work_sync(&io_req->rrq_work)) { 1736 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1737 "Putting ref for cancelled RRQ work xid=0x%x.\n", 1738 io_req->xid); 1739 kref_put(&io_req->refcount, qedf_release_cmd); 1740 } 1741 1742 if (cancel_delayed_work_sync(&io_req->timeout_work)) { 1743 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1744 "Putting ref for cancelled tmo work xid=0x%x.\n", 1745 io_req->xid); 1746 qedf_initiate_cleanup(io_req, true); 1747 /* Notify eh_abort handler that ABTS is 1748 * complete 1749 */ 1750 complete(&io_req->abts_done); 1751 clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 1752 /* ID: 002 */ 1753 kref_put(&io_req->refcount, qedf_release_cmd); 1754 } 1755 flush_cnt++; 1756 goto free_cmd; 1757 } 1758 1759 if (!io_req->sc_cmd) 1760 continue; 1761 if (!io_req->sc_cmd->device) { 1762 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1763 "Device backpointer NULL for sc_cmd=%p.\n", 1764 io_req->sc_cmd); 1765 /* Put reference for non-existent scsi_cmnd */ 1766 io_req->sc_cmd = NULL; 1767 qedf_initiate_cleanup(io_req, false); 1768 kref_put(&io_req->refcount, qedf_release_cmd); 1769 continue; 1770 } 1771 if (lun > -1) { 1772 if (io_req->lun != lun) 1773 continue; 1774 } 1775 1776 /* 1777 * Use kref_get_unless_zero in the unlikely case the command 1778 * we're about to flush was completed in the normal SCSI path 1779 */ 1780 rc = kref_get_unless_zero(&io_req->refcount); 1781 if (!rc) { 1782 QEDF_ERR(&(qedf->dbg_ctx), "Could not get kref for " 1783 "io_req=0x%p xid=0x%x\n", io_req, io_req->xid); 1784 continue; 1785 } 1786 1787 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1788 "Cleanup xid=0x%x.\n", io_req->xid); 1789 flush_cnt++; 1790 1791 /* Cleanup task and return I/O mid-layer */ 1792 qedf_initiate_cleanup(io_req, true); 1793 1794 free_cmd: 1795 kref_put(&io_req->refcount, qedf_release_cmd); /* ID: 004 */ 1796 } 1797 1798 wait_cnt = 60; 1799 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1800 "Flushed 0x%x I/Os, active=0x%x.\n", 1801 flush_cnt, atomic_read(&fcport->num_active_ios)); 1802 /* Only wait for all commands to complete in the Upload context */ 1803 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags) && 1804 (lun == -1)) { 1805 while (atomic_read(&fcport->num_active_ios)) { 1806 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1807 "Flushed 0x%x I/Os, active=0x%x cnt=%d.\n", 1808 flush_cnt, 1809 atomic_read(&fcport->num_active_ios), 1810 wait_cnt); 1811 if (wait_cnt == 0) { 1812 QEDF_ERR(&qedf->dbg_ctx, 1813 "Flushed %d I/Os, active=%d.\n", 1814 flush_cnt, 1815 atomic_read(&fcport->num_active_ios)); 1816 for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) { 1817 io_req = &cmd_mgr->cmds[i]; 1818 if (io_req->fcport && 1819 io_req->fcport == fcport) { 1820 refcount = 1821 kref_read(&io_req->refcount); 1822 set_bit(QEDF_CMD_DIRTY, 1823 &io_req->flags); 1824 QEDF_ERR(&qedf->dbg_ctx, 1825 "Outstanding io_req =%p xid=0x%x flags=0x%lx, sc_cmd=%p refcount=%d cmd_type=%d.\n", 1826 io_req, io_req->xid, 1827 io_req->flags, 1828 io_req->sc_cmd, 1829 refcount, 1830 io_req->cmd_type); 1831 } 1832 } 1833 WARN_ON(1); 1834 break; 1835 } 1836 msleep(500); 1837 wait_cnt--; 1838 } 1839 } 1840 1841 clear_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags); 1842 clear_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags); 1843 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Unlocking flush mutex.\n"); 1844 mutex_unlock(&qedf->flush_mutex); 1845 } 1846 1847 /* 1848 * Initiate a ABTS middle path command. Note that we don't have to initialize 1849 * the task context for an ABTS task. 1850 */ 1851 int qedf_initiate_abts(struct qedf_ioreq *io_req, bool return_scsi_cmd_on_abts) 1852 { 1853 struct fc_lport *lport; 1854 struct qedf_rport *fcport = io_req->fcport; 1855 struct fc_rport_priv *rdata; 1856 struct qedf_ctx *qedf; 1857 u16 xid; 1858 int rc = 0; 1859 unsigned long flags; 1860 struct fcoe_wqe *sqe; 1861 u16 sqe_idx; 1862 int refcount = 0; 1863 1864 /* Sanity check qedf_rport before dereferencing any pointers */ 1865 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 1866 QEDF_ERR(NULL, "tgt not offloaded\n"); 1867 rc = 1; 1868 goto out; 1869 } 1870 1871 qedf = fcport->qedf; 1872 rdata = fcport->rdata; 1873 1874 if (!rdata || !kref_get_unless_zero(&rdata->kref)) { 1875 QEDF_ERR(&qedf->dbg_ctx, "stale rport\n"); 1876 rc = 1; 1877 goto out; 1878 } 1879 1880 lport = qedf->lport; 1881 1882 if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 1883 QEDF_ERR(&(qedf->dbg_ctx), "link is not ready\n"); 1884 rc = 1; 1885 goto drop_rdata_kref; 1886 } 1887 1888 if (atomic_read(&qedf->link_down_tmo_valid) > 0) { 1889 QEDF_ERR(&(qedf->dbg_ctx), "link_down_tmo active.\n"); 1890 rc = 1; 1891 goto drop_rdata_kref; 1892 } 1893 1894 /* Ensure room on SQ */ 1895 if (!atomic_read(&fcport->free_sqes)) { 1896 QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n"); 1897 rc = 1; 1898 goto drop_rdata_kref; 1899 } 1900 1901 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 1902 QEDF_ERR(&qedf->dbg_ctx, "fcport is uploading.\n"); 1903 rc = 1; 1904 goto drop_rdata_kref; 1905 } 1906 1907 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || 1908 test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags) || 1909 test_bit(QEDF_CMD_IN_ABORT, &io_req->flags)) { 1910 QEDF_ERR(&qedf->dbg_ctx, 1911 "io_req xid=0x%x sc_cmd=%p already in cleanup or abort processing or already completed.\n", 1912 io_req->xid, io_req->sc_cmd); 1913 rc = 1; 1914 goto drop_rdata_kref; 1915 } 1916 1917 kref_get(&io_req->refcount); 1918 1919 xid = io_req->xid; 1920 qedf->control_requests++; 1921 qedf->packet_aborts++; 1922 1923 /* Set the command type to abort */ 1924 io_req->cmd_type = QEDF_ABTS; 1925 io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts; 1926 1927 set_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 1928 refcount = kref_read(&io_req->refcount); 1929 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 1930 "ABTS io_req xid = 0x%x refcount=%d\n", 1931 xid, refcount); 1932 1933 qedf_cmd_timer_set(qedf, io_req, QEDF_ABORT_TIMEOUT); 1934 1935 spin_lock_irqsave(&fcport->rport_lock, flags); 1936 1937 sqe_idx = qedf_get_sqe_idx(fcport); 1938 sqe = &fcport->sq[sqe_idx]; 1939 memset(sqe, 0, sizeof(struct fcoe_wqe)); 1940 io_req->task_params->sqe = sqe; 1941 1942 init_initiator_abort_fcoe_task(io_req->task_params); 1943 qedf_ring_doorbell(fcport); 1944 1945 spin_unlock_irqrestore(&fcport->rport_lock, flags); 1946 1947 drop_rdata_kref: 1948 kref_put(&rdata->kref, fc_rport_destroy); 1949 out: 1950 return rc; 1951 } 1952 1953 void qedf_process_abts_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1954 struct qedf_ioreq *io_req) 1955 { 1956 uint32_t r_ctl; 1957 int rc; 1958 struct qedf_rport *fcport = io_req->fcport; 1959 1960 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "Entered with xid = " 1961 "0x%x cmd_type = %d\n", io_req->xid, io_req->cmd_type); 1962 1963 r_ctl = cqe->cqe_info.abts_info.r_ctl; 1964 1965 /* This was added at a point when we were scheduling abts_compl & 1966 * cleanup_compl on different CPUs and there was a possibility of 1967 * the io_req to be freed from the other context before we got here. 1968 */ 1969 if (!fcport) { 1970 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1971 "Dropping ABTS completion xid=0x%x as fcport is NULL", 1972 io_req->xid); 1973 return; 1974 } 1975 1976 /* 1977 * When flush is active, let the cmds be completed from the cleanup 1978 * context 1979 */ 1980 if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags) || 1981 test_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags)) { 1982 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1983 "Dropping ABTS completion xid=0x%x as fcport is flushing", 1984 io_req->xid); 1985 return; 1986 } 1987 1988 if (!cancel_delayed_work(&io_req->timeout_work)) { 1989 QEDF_ERR(&qedf->dbg_ctx, 1990 "Wasn't able to cancel abts timeout work.\n"); 1991 } 1992 1993 switch (r_ctl) { 1994 case FC_RCTL_BA_ACC: 1995 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, 1996 "ABTS response - ACC Send RRQ after R_A_TOV\n"); 1997 io_req->event = QEDF_IOREQ_EV_ABORT_SUCCESS; 1998 rc = kref_get_unless_zero(&io_req->refcount); /* ID: 003 */ 1999 if (!rc) { 2000 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 2001 "kref is already zero so ABTS was already completed or flushed xid=0x%x.\n", 2002 io_req->xid); 2003 return; 2004 } 2005 /* 2006 * Dont release this cmd yet. It will be relesed 2007 * after we get RRQ response 2008 */ 2009 queue_delayed_work(qedf->dpc_wq, &io_req->rrq_work, 2010 msecs_to_jiffies(qedf->lport->r_a_tov)); 2011 atomic_set(&io_req->state, QEDFC_CMD_ST_RRQ_WAIT); 2012 break; 2013 /* For error cases let the cleanup return the command */ 2014 case FC_RCTL_BA_RJT: 2015 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, 2016 "ABTS response - RJT\n"); 2017 io_req->event = QEDF_IOREQ_EV_ABORT_FAILED; 2018 break; 2019 default: 2020 QEDF_ERR(&(qedf->dbg_ctx), "Unknown ABTS response\n"); 2021 break; 2022 } 2023 2024 clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 2025 2026 if (io_req->sc_cmd) { 2027 if (!io_req->return_scsi_cmd_on_abts) 2028 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 2029 "Not call scsi_done for xid=0x%x.\n", 2030 io_req->xid); 2031 if (io_req->return_scsi_cmd_on_abts) 2032 qedf_scsi_done(qedf, io_req, DID_ERROR); 2033 } 2034 2035 /* Notify eh_abort handler that ABTS is complete */ 2036 complete(&io_req->abts_done); 2037 2038 kref_put(&io_req->refcount, qedf_release_cmd); 2039 } 2040 2041 int qedf_init_mp_req(struct qedf_ioreq *io_req) 2042 { 2043 struct qedf_mp_req *mp_req; 2044 struct scsi_sge *mp_req_bd; 2045 struct scsi_sge *mp_resp_bd; 2046 struct qedf_ctx *qedf = io_req->fcport->qedf; 2047 dma_addr_t addr; 2048 uint64_t sz; 2049 2050 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_MP_REQ, "Entered.\n"); 2051 2052 mp_req = (struct qedf_mp_req *)&(io_req->mp_req); 2053 memset(mp_req, 0, sizeof(struct qedf_mp_req)); 2054 2055 if (io_req->cmd_type != QEDF_ELS) { 2056 mp_req->req_len = sizeof(struct fcp_cmnd); 2057 io_req->data_xfer_len = mp_req->req_len; 2058 } else 2059 mp_req->req_len = io_req->data_xfer_len; 2060 2061 mp_req->req_buf = dma_alloc_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE, 2062 &mp_req->req_buf_dma, GFP_KERNEL); 2063 if (!mp_req->req_buf) { 2064 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP req buffer\n"); 2065 qedf_free_mp_resc(io_req); 2066 return -ENOMEM; 2067 } 2068 2069 mp_req->resp_buf = dma_alloc_coherent(&qedf->pdev->dev, 2070 QEDF_PAGE_SIZE, &mp_req->resp_buf_dma, GFP_KERNEL); 2071 if (!mp_req->resp_buf) { 2072 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc TM resp " 2073 "buffer\n"); 2074 qedf_free_mp_resc(io_req); 2075 return -ENOMEM; 2076 } 2077 2078 /* Allocate and map mp_req_bd and mp_resp_bd */ 2079 sz = sizeof(struct scsi_sge); 2080 mp_req->mp_req_bd = dma_alloc_coherent(&qedf->pdev->dev, sz, 2081 &mp_req->mp_req_bd_dma, GFP_KERNEL); 2082 if (!mp_req->mp_req_bd) { 2083 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP req bd\n"); 2084 qedf_free_mp_resc(io_req); 2085 return -ENOMEM; 2086 } 2087 2088 mp_req->mp_resp_bd = dma_alloc_coherent(&qedf->pdev->dev, sz, 2089 &mp_req->mp_resp_bd_dma, GFP_KERNEL); 2090 if (!mp_req->mp_resp_bd) { 2091 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP resp bd\n"); 2092 qedf_free_mp_resc(io_req); 2093 return -ENOMEM; 2094 } 2095 2096 /* Fill bd table */ 2097 addr = mp_req->req_buf_dma; 2098 mp_req_bd = mp_req->mp_req_bd; 2099 mp_req_bd->sge_addr.lo = U64_LO(addr); 2100 mp_req_bd->sge_addr.hi = U64_HI(addr); 2101 mp_req_bd->sge_len = QEDF_PAGE_SIZE; 2102 2103 /* 2104 * MP buffer is either a task mgmt command or an ELS. 2105 * So the assumption is that it consumes a single bd 2106 * entry in the bd table 2107 */ 2108 mp_resp_bd = mp_req->mp_resp_bd; 2109 addr = mp_req->resp_buf_dma; 2110 mp_resp_bd->sge_addr.lo = U64_LO(addr); 2111 mp_resp_bd->sge_addr.hi = U64_HI(addr); 2112 mp_resp_bd->sge_len = QEDF_PAGE_SIZE; 2113 2114 return 0; 2115 } 2116 2117 /* 2118 * Last ditch effort to clear the port if it's stuck. Used only after a 2119 * cleanup task times out. 2120 */ 2121 static void qedf_drain_request(struct qedf_ctx *qedf) 2122 { 2123 if (test_bit(QEDF_DRAIN_ACTIVE, &qedf->flags)) { 2124 QEDF_ERR(&(qedf->dbg_ctx), "MCP drain already active.\n"); 2125 return; 2126 } 2127 2128 /* Set bit to return all queuecommand requests as busy */ 2129 set_bit(QEDF_DRAIN_ACTIVE, &qedf->flags); 2130 2131 /* Call qed drain request for function. Should be synchronous */ 2132 qed_ops->common->drain(qedf->cdev); 2133 2134 /* Settle time for CQEs to be returned */ 2135 msleep(100); 2136 2137 /* Unplug and continue */ 2138 clear_bit(QEDF_DRAIN_ACTIVE, &qedf->flags); 2139 } 2140 2141 /* 2142 * Returns SUCCESS if the cleanup task does not timeout, otherwise return 2143 * FAILURE. 2144 */ 2145 int qedf_initiate_cleanup(struct qedf_ioreq *io_req, 2146 bool return_scsi_cmd_on_abts) 2147 { 2148 struct qedf_rport *fcport; 2149 struct qedf_ctx *qedf; 2150 int tmo = 0; 2151 int rc = SUCCESS; 2152 unsigned long flags; 2153 struct fcoe_wqe *sqe; 2154 u16 sqe_idx; 2155 int refcount = 0; 2156 2157 fcport = io_req->fcport; 2158 if (!fcport) { 2159 QEDF_ERR(NULL, "fcport is NULL.\n"); 2160 return SUCCESS; 2161 } 2162 2163 /* Sanity check qedf_rport before dereferencing any pointers */ 2164 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 2165 QEDF_ERR(NULL, "tgt not offloaded\n"); 2166 return SUCCESS; 2167 } 2168 2169 qedf = fcport->qedf; 2170 if (!qedf) { 2171 QEDF_ERR(NULL, "qedf is NULL.\n"); 2172 return SUCCESS; 2173 } 2174 2175 if (io_req->cmd_type == QEDF_ELS) { 2176 goto process_els; 2177 } 2178 2179 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || 2180 test_and_set_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags)) { 2181 QEDF_ERR(&(qedf->dbg_ctx), "io_req xid=0x%x already in " 2182 "cleanup processing or already completed.\n", 2183 io_req->xid); 2184 return SUCCESS; 2185 } 2186 set_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2187 2188 process_els: 2189 /* Ensure room on SQ */ 2190 if (!atomic_read(&fcport->free_sqes)) { 2191 QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n"); 2192 /* Need to make sure we clear the flag since it was set */ 2193 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2194 return FAILED; 2195 } 2196 2197 if (io_req->cmd_type == QEDF_CLEANUP) { 2198 QEDF_ERR(&qedf->dbg_ctx, 2199 "io_req=0x%x is already a cleanup command cmd_type=%d.\n", 2200 io_req->xid, io_req->cmd_type); 2201 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2202 return SUCCESS; 2203 } 2204 2205 refcount = kref_read(&io_req->refcount); 2206 2207 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 2208 "Entered xid=0x%x sc_cmd=%p cmd_type=%d flags=0x%lx refcount=%d fcport=%p port_id=0x%06x\n", 2209 io_req->xid, io_req->sc_cmd, io_req->cmd_type, io_req->flags, 2210 refcount, fcport, fcport->rdata->ids.port_id); 2211 2212 /* Cleanup cmds re-use the same TID as the original I/O */ 2213 io_req->cmd_type = QEDF_CLEANUP; 2214 io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts; 2215 2216 init_completion(&io_req->cleanup_done); 2217 2218 spin_lock_irqsave(&fcport->rport_lock, flags); 2219 2220 sqe_idx = qedf_get_sqe_idx(fcport); 2221 sqe = &fcport->sq[sqe_idx]; 2222 memset(sqe, 0, sizeof(struct fcoe_wqe)); 2223 io_req->task_params->sqe = sqe; 2224 2225 init_initiator_cleanup_fcoe_task(io_req->task_params); 2226 qedf_ring_doorbell(fcport); 2227 2228 spin_unlock_irqrestore(&fcport->rport_lock, flags); 2229 2230 tmo = wait_for_completion_timeout(&io_req->cleanup_done, 2231 QEDF_CLEANUP_TIMEOUT * HZ); 2232 2233 if (!tmo) { 2234 rc = FAILED; 2235 /* Timeout case */ 2236 QEDF_ERR(&(qedf->dbg_ctx), "Cleanup command timeout, " 2237 "xid=%x.\n", io_req->xid); 2238 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2239 /* Issue a drain request if cleanup task times out */ 2240 QEDF_ERR(&(qedf->dbg_ctx), "Issuing MCP drain request.\n"); 2241 qedf_drain_request(qedf); 2242 } 2243 2244 /* If it TASK MGMT handle it, reference will be decreased 2245 * in qedf_execute_tmf 2246 */ 2247 if (io_req->tm_flags == FCP_TMF_LUN_RESET || 2248 io_req->tm_flags == FCP_TMF_TGT_RESET) { 2249 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2250 io_req->sc_cmd = NULL; 2251 complete(&io_req->tm_done); 2252 } 2253 2254 if (io_req->sc_cmd) { 2255 if (!io_req->return_scsi_cmd_on_abts) 2256 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 2257 "Not call scsi_done for xid=0x%x.\n", 2258 io_req->xid); 2259 if (io_req->return_scsi_cmd_on_abts) 2260 qedf_scsi_done(qedf, io_req, DID_ERROR); 2261 } 2262 2263 if (rc == SUCCESS) 2264 io_req->event = QEDF_IOREQ_EV_CLEANUP_SUCCESS; 2265 else 2266 io_req->event = QEDF_IOREQ_EV_CLEANUP_FAILED; 2267 2268 return rc; 2269 } 2270 2271 void qedf_process_cleanup_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 2272 struct qedf_ioreq *io_req) 2273 { 2274 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "Entered xid = 0x%x\n", 2275 io_req->xid); 2276 2277 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2278 2279 /* Complete so we can finish cleaning up the I/O */ 2280 complete(&io_req->cleanup_done); 2281 } 2282 2283 static int qedf_execute_tmf(struct qedf_rport *fcport, struct scsi_cmnd *sc_cmd, 2284 uint8_t tm_flags) 2285 { 2286 struct qedf_ioreq *io_req; 2287 struct e4_fcoe_task_context *task; 2288 struct qedf_ctx *qedf = fcport->qedf; 2289 struct fc_lport *lport = qedf->lport; 2290 int rc = 0; 2291 uint16_t xid; 2292 int tmo = 0; 2293 int lun = 0; 2294 unsigned long flags; 2295 struct fcoe_wqe *sqe; 2296 u16 sqe_idx; 2297 2298 if (!sc_cmd) { 2299 QEDF_ERR(&qedf->dbg_ctx, "sc_cmd is NULL\n"); 2300 return FAILED; 2301 } 2302 2303 lun = (int)sc_cmd->device->lun; 2304 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 2305 QEDF_ERR(&(qedf->dbg_ctx), "fcport not offloaded\n"); 2306 rc = FAILED; 2307 goto no_flush; 2308 } 2309 2310 io_req = qedf_alloc_cmd(fcport, QEDF_TASK_MGMT_CMD); 2311 if (!io_req) { 2312 QEDF_ERR(&(qedf->dbg_ctx), "Failed TMF"); 2313 rc = -EAGAIN; 2314 goto no_flush; 2315 } 2316 2317 if (tm_flags == FCP_TMF_LUN_RESET) 2318 qedf->lun_resets++; 2319 else if (tm_flags == FCP_TMF_TGT_RESET) 2320 qedf->target_resets++; 2321 2322 /* Initialize rest of io_req fields */ 2323 io_req->sc_cmd = sc_cmd; 2324 io_req->fcport = fcport; 2325 io_req->cmd_type = QEDF_TASK_MGMT_CMD; 2326 2327 /* Record which cpu this request is associated with */ 2328 io_req->cpu = smp_processor_id(); 2329 2330 /* Set TM flags */ 2331 io_req->io_req_flags = QEDF_READ; 2332 io_req->data_xfer_len = 0; 2333 io_req->tm_flags = tm_flags; 2334 2335 /* Default is to return a SCSI command when an error occurs */ 2336 io_req->return_scsi_cmd_on_abts = false; 2337 2338 /* Obtain exchange id */ 2339 xid = io_req->xid; 2340 2341 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "TMF io_req xid = " 2342 "0x%x\n", xid); 2343 2344 /* Initialize task context for this IO request */ 2345 task = qedf_get_task_mem(&qedf->tasks, xid); 2346 2347 init_completion(&io_req->tm_done); 2348 2349 spin_lock_irqsave(&fcport->rport_lock, flags); 2350 2351 sqe_idx = qedf_get_sqe_idx(fcport); 2352 sqe = &fcport->sq[sqe_idx]; 2353 memset(sqe, 0, sizeof(struct fcoe_wqe)); 2354 2355 qedf_init_task(fcport, lport, io_req, task, sqe); 2356 qedf_ring_doorbell(fcport); 2357 2358 spin_unlock_irqrestore(&fcport->rport_lock, flags); 2359 2360 set_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2361 tmo = wait_for_completion_timeout(&io_req->tm_done, 2362 QEDF_TM_TIMEOUT * HZ); 2363 2364 if (!tmo) { 2365 rc = FAILED; 2366 QEDF_ERR(&(qedf->dbg_ctx), "wait for tm_cmpl timeout!\n"); 2367 /* Clear outstanding bit since command timed out */ 2368 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2369 io_req->sc_cmd = NULL; 2370 } else { 2371 /* Check TMF response code */ 2372 if (io_req->fcp_rsp_code == 0) 2373 rc = SUCCESS; 2374 else 2375 rc = FAILED; 2376 } 2377 /* 2378 * Double check that fcport has not gone into an uploading state before 2379 * executing the command flush for the LUN/target. 2380 */ 2381 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 2382 QEDF_ERR(&qedf->dbg_ctx, 2383 "fcport is uploading, not executing flush.\n"); 2384 goto no_flush; 2385 } 2386 /* We do not need this io_req any more */ 2387 kref_put(&io_req->refcount, qedf_release_cmd); 2388 2389 2390 if (tm_flags == FCP_TMF_LUN_RESET) 2391 qedf_flush_active_ios(fcport, lun); 2392 else 2393 qedf_flush_active_ios(fcport, -1); 2394 2395 no_flush: 2396 if (rc != SUCCESS) { 2397 QEDF_ERR(&(qedf->dbg_ctx), "task mgmt command failed...\n"); 2398 rc = FAILED; 2399 } else { 2400 QEDF_ERR(&(qedf->dbg_ctx), "task mgmt command success...\n"); 2401 rc = SUCCESS; 2402 } 2403 return rc; 2404 } 2405 2406 int qedf_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags) 2407 { 2408 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 2409 struct fc_rport_libfc_priv *rp = rport->dd_data; 2410 struct qedf_rport *fcport = (struct qedf_rport *)&rp[1]; 2411 struct qedf_ctx *qedf; 2412 struct fc_lport *lport = shost_priv(sc_cmd->device->host); 2413 int rc = SUCCESS; 2414 int rval; 2415 struct qedf_ioreq *io_req = NULL; 2416 int ref_cnt = 0; 2417 struct fc_rport_priv *rdata = fcport->rdata; 2418 2419 QEDF_ERR(NULL, 2420 "tm_flags 0x%x sc_cmd %p op = 0x%02x target_id = 0x%x lun=%d\n", 2421 tm_flags, sc_cmd, sc_cmd->cmd_len ? sc_cmd->cmnd[0] : 0xff, 2422 rport->scsi_target_id, (int)sc_cmd->device->lun); 2423 2424 if (!rdata || !kref_get_unless_zero(&rdata->kref)) { 2425 QEDF_ERR(NULL, "stale rport\n"); 2426 return FAILED; 2427 } 2428 2429 QEDF_ERR(NULL, "portid=%06x tm_flags =%s\n", rdata->ids.port_id, 2430 (tm_flags == FCP_TMF_TGT_RESET) ? "TARGET RESET" : 2431 "LUN RESET"); 2432 2433 if (sc_cmd->SCp.ptr) { 2434 io_req = (struct qedf_ioreq *)sc_cmd->SCp.ptr; 2435 ref_cnt = kref_read(&io_req->refcount); 2436 QEDF_ERR(NULL, 2437 "orig io_req = %p xid = 0x%x ref_cnt = %d.\n", 2438 io_req, io_req->xid, ref_cnt); 2439 } 2440 2441 rval = fc_remote_port_chkready(rport); 2442 if (rval) { 2443 QEDF_ERR(NULL, "device_reset rport not ready\n"); 2444 rc = FAILED; 2445 goto tmf_err; 2446 } 2447 2448 rc = fc_block_scsi_eh(sc_cmd); 2449 if (rc) 2450 goto tmf_err; 2451 2452 if (!fcport) { 2453 QEDF_ERR(NULL, "device_reset: rport is NULL\n"); 2454 rc = FAILED; 2455 goto tmf_err; 2456 } 2457 2458 qedf = fcport->qedf; 2459 2460 if (!qedf) { 2461 QEDF_ERR(NULL, "qedf is NULL.\n"); 2462 rc = FAILED; 2463 goto tmf_err; 2464 } 2465 2466 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 2467 QEDF_ERR(&qedf->dbg_ctx, "Connection is getting uploaded.\n"); 2468 rc = SUCCESS; 2469 goto tmf_err; 2470 } 2471 2472 if (test_bit(QEDF_UNLOADING, &qedf->flags) || 2473 test_bit(QEDF_DBG_STOP_IO, &qedf->flags)) { 2474 rc = SUCCESS; 2475 goto tmf_err; 2476 } 2477 2478 if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 2479 QEDF_ERR(&(qedf->dbg_ctx), "link is not ready\n"); 2480 rc = FAILED; 2481 goto tmf_err; 2482 } 2483 2484 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 2485 if (!fcport->rdata) 2486 QEDF_ERR(&qedf->dbg_ctx, "fcport %p is uploading.\n", 2487 fcport); 2488 else 2489 QEDF_ERR(&qedf->dbg_ctx, 2490 "fcport %p port_id=%06x is uploading.\n", 2491 fcport, fcport->rdata->ids.port_id); 2492 rc = FAILED; 2493 goto tmf_err; 2494 } 2495 2496 rc = qedf_execute_tmf(fcport, sc_cmd, tm_flags); 2497 2498 tmf_err: 2499 kref_put(&rdata->kref, fc_rport_destroy); 2500 return rc; 2501 } 2502 2503 void qedf_process_tmf_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 2504 struct qedf_ioreq *io_req) 2505 { 2506 struct fcoe_cqe_rsp_info *fcp_rsp; 2507 2508 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2509 2510 fcp_rsp = &cqe->cqe_info.rsp_info; 2511 qedf_parse_fcp_rsp(io_req, fcp_rsp); 2512 2513 io_req->sc_cmd = NULL; 2514 complete(&io_req->tm_done); 2515 } 2516 2517 void qedf_process_unsol_compl(struct qedf_ctx *qedf, uint16_t que_idx, 2518 struct fcoe_cqe *cqe) 2519 { 2520 unsigned long flags; 2521 uint16_t pktlen = cqe->cqe_info.unsolic_info.pkt_len; 2522 u32 payload_len, crc; 2523 struct fc_frame_header *fh; 2524 struct fc_frame *fp; 2525 struct qedf_io_work *io_work; 2526 u32 bdq_idx; 2527 void *bdq_addr; 2528 struct scsi_bd *p_bd_info; 2529 2530 p_bd_info = &cqe->cqe_info.unsolic_info.bd_info; 2531 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL, 2532 "address.hi=%x, address.lo=%x, opaque_data.hi=%x, opaque_data.lo=%x, bdq_prod_idx=%u, len=%u\n", 2533 le32_to_cpu(p_bd_info->address.hi), 2534 le32_to_cpu(p_bd_info->address.lo), 2535 le32_to_cpu(p_bd_info->opaque.fcoe_opaque.hi), 2536 le32_to_cpu(p_bd_info->opaque.fcoe_opaque.lo), 2537 qedf->bdq_prod_idx, pktlen); 2538 2539 bdq_idx = le32_to_cpu(p_bd_info->opaque.fcoe_opaque.lo); 2540 if (bdq_idx >= QEDF_BDQ_SIZE) { 2541 QEDF_ERR(&(qedf->dbg_ctx), "bdq_idx is out of range %d.\n", 2542 bdq_idx); 2543 goto increment_prod; 2544 } 2545 2546 bdq_addr = qedf->bdq[bdq_idx].buf_addr; 2547 if (!bdq_addr) { 2548 QEDF_ERR(&(qedf->dbg_ctx), "bdq_addr is NULL, dropping " 2549 "unsolicited packet.\n"); 2550 goto increment_prod; 2551 } 2552 2553 if (qedf_dump_frames) { 2554 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL, 2555 "BDQ frame is at addr=%p.\n", bdq_addr); 2556 print_hex_dump(KERN_WARNING, "bdq ", DUMP_PREFIX_OFFSET, 16, 1, 2557 (void *)bdq_addr, pktlen, false); 2558 } 2559 2560 /* Allocate frame */ 2561 payload_len = pktlen - sizeof(struct fc_frame_header); 2562 fp = fc_frame_alloc(qedf->lport, payload_len); 2563 if (!fp) { 2564 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate fp.\n"); 2565 goto increment_prod; 2566 } 2567 2568 /* Copy data from BDQ buffer into fc_frame struct */ 2569 fh = (struct fc_frame_header *)fc_frame_header_get(fp); 2570 memcpy(fh, (void *)bdq_addr, pktlen); 2571 2572 QEDF_WARN(&qedf->dbg_ctx, 2573 "Processing Unsolicated frame, src=%06x dest=%06x r_ctl=0x%x type=0x%x cmd=%02x\n", 2574 ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl, 2575 fh->fh_type, fc_frame_payload_op(fp)); 2576 2577 /* Initialize the frame so libfc sees it as a valid frame */ 2578 crc = fcoe_fc_crc(fp); 2579 fc_frame_init(fp); 2580 fr_dev(fp) = qedf->lport; 2581 fr_sof(fp) = FC_SOF_I3; 2582 fr_eof(fp) = FC_EOF_T; 2583 fr_crc(fp) = cpu_to_le32(~crc); 2584 2585 /* 2586 * We need to return the frame back up to libfc in a non-atomic 2587 * context 2588 */ 2589 io_work = mempool_alloc(qedf->io_mempool, GFP_ATOMIC); 2590 if (!io_work) { 2591 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate " 2592 "work for I/O completion.\n"); 2593 fc_frame_free(fp); 2594 goto increment_prod; 2595 } 2596 memset(io_work, 0, sizeof(struct qedf_io_work)); 2597 2598 INIT_WORK(&io_work->work, qedf_fp_io_handler); 2599 2600 /* Copy contents of CQE for deferred processing */ 2601 memcpy(&io_work->cqe, cqe, sizeof(struct fcoe_cqe)); 2602 2603 io_work->qedf = qedf; 2604 io_work->fp = fp; 2605 2606 queue_work_on(smp_processor_id(), qedf_io_wq, &io_work->work); 2607 increment_prod: 2608 spin_lock_irqsave(&qedf->hba_lock, flags); 2609 2610 /* Increment producer to let f/w know we've handled the frame */ 2611 qedf->bdq_prod_idx++; 2612 2613 /* Producer index wraps at uint16_t boundary */ 2614 if (qedf->bdq_prod_idx == 0xffff) 2615 qedf->bdq_prod_idx = 0; 2616 2617 writew(qedf->bdq_prod_idx, qedf->bdq_primary_prod); 2618 readw(qedf->bdq_primary_prod); 2619 writew(qedf->bdq_prod_idx, qedf->bdq_secondary_prod); 2620 readw(qedf->bdq_secondary_prod); 2621 2622 spin_unlock_irqrestore(&qedf->hba_lock, flags); 2623 } 2624