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