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 qedf_priv(sc_cmd)->io_req = 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 io_req->cdb_status = fcp_rsp->scsi_status_code; 1069 1070 if (rsp_flags & 1071 FCOE_FCP_RSP_FLAGS_FCP_RSP_LEN_VALID) 1072 fcp_rsp_len = fcp_rsp->fcp_rsp_len; 1073 1074 if (rsp_flags & 1075 FCOE_FCP_RSP_FLAGS_FCP_SNS_LEN_VALID) 1076 fcp_sns_len = fcp_rsp->fcp_sns_len; 1077 1078 io_req->fcp_rsp_len = fcp_rsp_len; 1079 io_req->fcp_sns_len = fcp_sns_len; 1080 rsp_info = sense_data = io_req->sense_buffer; 1081 1082 /* fetch fcp_rsp_code */ 1083 if ((fcp_rsp_len == 4) || (fcp_rsp_len == 8)) { 1084 /* Only for task management function */ 1085 io_req->fcp_rsp_code = rsp_info[3]; 1086 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1087 "fcp_rsp_code = %d\n", io_req->fcp_rsp_code); 1088 /* Adjust sense-data location. */ 1089 sense_data += fcp_rsp_len; 1090 } 1091 1092 if (fcp_sns_len > SCSI_SENSE_BUFFERSIZE) { 1093 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1094 "Truncating sense buffer\n"); 1095 fcp_sns_len = SCSI_SENSE_BUFFERSIZE; 1096 } 1097 1098 /* The sense buffer can be NULL for TMF commands */ 1099 if (sc_cmd->sense_buffer) { 1100 memset(sc_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1101 if (fcp_sns_len) 1102 memcpy(sc_cmd->sense_buffer, sense_data, 1103 fcp_sns_len); 1104 } 1105 } 1106 1107 static void qedf_unmap_sg_list(struct qedf_ctx *qedf, struct qedf_ioreq *io_req) 1108 { 1109 struct scsi_cmnd *sc = io_req->sc_cmd; 1110 1111 if (io_req->bd_tbl->bd_valid && sc && scsi_sg_count(sc)) { 1112 dma_unmap_sg(&qedf->pdev->dev, scsi_sglist(sc), 1113 scsi_sg_count(sc), sc->sc_data_direction); 1114 io_req->bd_tbl->bd_valid = 0; 1115 } 1116 } 1117 1118 void qedf_scsi_completion(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1119 struct qedf_ioreq *io_req) 1120 { 1121 struct scsi_cmnd *sc_cmd; 1122 struct fcoe_cqe_rsp_info *fcp_rsp; 1123 struct qedf_rport *fcport; 1124 int refcount; 1125 u16 scope, qualifier = 0; 1126 u8 fw_residual_flag = 0; 1127 unsigned long flags = 0; 1128 u16 chk_scope = 0; 1129 1130 if (!io_req) 1131 return; 1132 if (!cqe) 1133 return; 1134 1135 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || 1136 test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags) || 1137 test_bit(QEDF_CMD_IN_ABORT, &io_req->flags)) { 1138 QEDF_ERR(&qedf->dbg_ctx, 1139 "io_req xid=0x%x already in cleanup or abort processing or already completed.\n", 1140 io_req->xid); 1141 return; 1142 } 1143 1144 sc_cmd = io_req->sc_cmd; 1145 fcp_rsp = &cqe->cqe_info.rsp_info; 1146 1147 if (!sc_cmd) { 1148 QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd is NULL!\n"); 1149 return; 1150 } 1151 1152 if (!qedf_priv(sc_cmd)->io_req) { 1153 QEDF_WARN(&(qedf->dbg_ctx), 1154 "io_req is NULL, returned in another context.\n"); 1155 return; 1156 } 1157 1158 if (!sc_cmd->device) { 1159 QEDF_ERR(&qedf->dbg_ctx, 1160 "Device for sc_cmd %p is NULL.\n", sc_cmd); 1161 return; 1162 } 1163 1164 if (!scsi_cmd_to_rq(sc_cmd)->q) { 1165 QEDF_WARN(&(qedf->dbg_ctx), "request->q is NULL so request " 1166 "is not valid, sc_cmd=%p.\n", sc_cmd); 1167 return; 1168 } 1169 1170 fcport = io_req->fcport; 1171 1172 /* 1173 * When flush is active, let the cmds be completed from the cleanup 1174 * context 1175 */ 1176 if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags) || 1177 (test_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags) && 1178 sc_cmd->device->lun == (u64)fcport->lun_reset_lun)) { 1179 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1180 "Dropping good completion xid=0x%x as fcport is flushing", 1181 io_req->xid); 1182 return; 1183 } 1184 1185 qedf_parse_fcp_rsp(io_req, fcp_rsp); 1186 1187 qedf_unmap_sg_list(qedf, io_req); 1188 1189 /* Check for FCP transport error */ 1190 if (io_req->fcp_rsp_len > 3 && io_req->fcp_rsp_code) { 1191 QEDF_ERR(&(qedf->dbg_ctx), 1192 "FCP I/O protocol failure xid=0x%x fcp_rsp_len=%d " 1193 "fcp_rsp_code=%d.\n", io_req->xid, io_req->fcp_rsp_len, 1194 io_req->fcp_rsp_code); 1195 sc_cmd->result = DID_BUS_BUSY << 16; 1196 goto out; 1197 } 1198 1199 fw_residual_flag = GET_FIELD(cqe->cqe_info.rsp_info.fw_error_flags, 1200 FCOE_CQE_RSP_INFO_FW_UNDERRUN); 1201 if (fw_residual_flag) { 1202 QEDF_ERR(&qedf->dbg_ctx, 1203 "Firmware detected underrun: xid=0x%x fcp_rsp.flags=0x%02x fcp_resid=%d fw_residual=0x%x lba=%02x%02x%02x%02x.\n", 1204 io_req->xid, fcp_rsp->rsp_flags.flags, 1205 io_req->fcp_resid, 1206 cqe->cqe_info.rsp_info.fw_residual, sc_cmd->cmnd[2], 1207 sc_cmd->cmnd[3], sc_cmd->cmnd[4], sc_cmd->cmnd[5]); 1208 1209 if (io_req->cdb_status == 0) 1210 sc_cmd->result = (DID_ERROR << 16) | io_req->cdb_status; 1211 else 1212 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1213 1214 /* 1215 * Set resid to the whole buffer length so we won't try to resue 1216 * any previously data. 1217 */ 1218 scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); 1219 goto out; 1220 } 1221 1222 switch (io_req->fcp_status) { 1223 case FC_GOOD: 1224 if (io_req->cdb_status == 0) { 1225 /* Good I/O completion */ 1226 sc_cmd->result = DID_OK << 16; 1227 } else { 1228 refcount = kref_read(&io_req->refcount); 1229 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1230 "%d:0:%d:%lld xid=0x%0x op=0x%02x " 1231 "lba=%02x%02x%02x%02x cdb_status=%d " 1232 "fcp_resid=0x%x refcount=%d.\n", 1233 qedf->lport->host->host_no, sc_cmd->device->id, 1234 sc_cmd->device->lun, io_req->xid, 1235 sc_cmd->cmnd[0], sc_cmd->cmnd[2], sc_cmd->cmnd[3], 1236 sc_cmd->cmnd[4], sc_cmd->cmnd[5], 1237 io_req->cdb_status, io_req->fcp_resid, 1238 refcount); 1239 sc_cmd->result = (DID_OK << 16) | io_req->cdb_status; 1240 1241 if (io_req->cdb_status == SAM_STAT_TASK_SET_FULL || 1242 io_req->cdb_status == SAM_STAT_BUSY) { 1243 /* 1244 * Check whether we need to set retry_delay at 1245 * all based on retry_delay module parameter 1246 * and the status qualifier. 1247 */ 1248 1249 /* Upper 2 bits */ 1250 scope = fcp_rsp->retry_delay_timer & 0xC000; 1251 /* Lower 14 bits */ 1252 qualifier = fcp_rsp->retry_delay_timer & 0x3FFF; 1253 1254 if (qedf_retry_delay) 1255 chk_scope = 1; 1256 /* Record stats */ 1257 if (io_req->cdb_status == 1258 SAM_STAT_TASK_SET_FULL) 1259 qedf->task_set_fulls++; 1260 else 1261 qedf->busy++; 1262 } 1263 } 1264 if (io_req->fcp_resid) 1265 scsi_set_resid(sc_cmd, io_req->fcp_resid); 1266 1267 if (chk_scope == 1) { 1268 if ((scope == 1 || scope == 2) && 1269 (qualifier > 0 && qualifier <= 0x3FEF)) { 1270 /* Check we don't go over the max */ 1271 if (qualifier > QEDF_RETRY_DELAY_MAX) { 1272 qualifier = QEDF_RETRY_DELAY_MAX; 1273 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1274 "qualifier = %d\n", 1275 (fcp_rsp->retry_delay_timer & 1276 0x3FFF)); 1277 } 1278 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1279 "Scope = %d and qualifier = %d", 1280 scope, qualifier); 1281 /* Take fcport->rport_lock to 1282 * update the retry_delay_timestamp 1283 */ 1284 spin_lock_irqsave(&fcport->rport_lock, flags); 1285 fcport->retry_delay_timestamp = 1286 jiffies + (qualifier * HZ / 10); 1287 spin_unlock_irqrestore(&fcport->rport_lock, 1288 flags); 1289 1290 } else { 1291 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1292 "combination of scope = %d and qualifier = %d is not handled in qedf.\n", 1293 scope, qualifier); 1294 } 1295 } 1296 break; 1297 default: 1298 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "fcp_status=%d.\n", 1299 io_req->fcp_status); 1300 break; 1301 } 1302 1303 out: 1304 if (qedf_io_tracing) 1305 qedf_trace_io(fcport, io_req, QEDF_IO_TRACE_RSP); 1306 1307 /* 1308 * We wait till the end of the function to clear the 1309 * outstanding bit in case we need to send an abort 1310 */ 1311 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 1312 1313 io_req->sc_cmd = NULL; 1314 qedf_priv(sc_cmd)->io_req = NULL; 1315 scsi_done(sc_cmd); 1316 kref_put(&io_req->refcount, qedf_release_cmd); 1317 } 1318 1319 /* Return a SCSI command in some other context besides a normal completion */ 1320 void qedf_scsi_done(struct qedf_ctx *qedf, struct qedf_ioreq *io_req, 1321 int result) 1322 { 1323 struct scsi_cmnd *sc_cmd; 1324 int refcount; 1325 1326 if (!io_req) { 1327 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "io_req is NULL\n"); 1328 return; 1329 } 1330 1331 if (test_and_set_bit(QEDF_CMD_ERR_SCSI_DONE, &io_req->flags)) { 1332 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1333 "io_req:%p scsi_done handling already done\n", 1334 io_req); 1335 return; 1336 } 1337 1338 /* 1339 * We will be done with this command after this call so clear the 1340 * outstanding bit. 1341 */ 1342 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 1343 1344 sc_cmd = io_req->sc_cmd; 1345 1346 if (!sc_cmd) { 1347 QEDF_WARN(&(qedf->dbg_ctx), "sc_cmd is NULL!\n"); 1348 return; 1349 } 1350 1351 if (!virt_addr_valid(sc_cmd)) { 1352 QEDF_ERR(&qedf->dbg_ctx, "sc_cmd=%p is not valid.", sc_cmd); 1353 goto bad_scsi_ptr; 1354 } 1355 1356 if (!qedf_priv(sc_cmd)->io_req) { 1357 QEDF_WARN(&(qedf->dbg_ctx), 1358 "io_req is NULL, returned in another context.\n"); 1359 return; 1360 } 1361 1362 if (!sc_cmd->device) { 1363 QEDF_ERR(&qedf->dbg_ctx, "Device for sc_cmd %p is NULL.\n", 1364 sc_cmd); 1365 goto bad_scsi_ptr; 1366 } 1367 1368 if (!virt_addr_valid(sc_cmd->device)) { 1369 QEDF_ERR(&qedf->dbg_ctx, 1370 "Device pointer for sc_cmd %p is bad.\n", sc_cmd); 1371 goto bad_scsi_ptr; 1372 } 1373 1374 if (!sc_cmd->sense_buffer) { 1375 QEDF_ERR(&qedf->dbg_ctx, 1376 "sc_cmd->sense_buffer for sc_cmd %p is NULL.\n", 1377 sc_cmd); 1378 goto bad_scsi_ptr; 1379 } 1380 1381 if (!virt_addr_valid(sc_cmd->sense_buffer)) { 1382 QEDF_ERR(&qedf->dbg_ctx, 1383 "sc_cmd->sense_buffer for sc_cmd %p is bad.\n", 1384 sc_cmd); 1385 goto bad_scsi_ptr; 1386 } 1387 1388 qedf_unmap_sg_list(qedf, io_req); 1389 1390 sc_cmd->result = result << 16; 1391 refcount = kref_read(&io_req->refcount); 1392 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "%d:0:%d:%lld: Completing " 1393 "sc_cmd=%p result=0x%08x op=0x%02x lba=0x%02x%02x%02x%02x, " 1394 "allowed=%d retries=%d refcount=%d.\n", 1395 qedf->lport->host->host_no, sc_cmd->device->id, 1396 sc_cmd->device->lun, sc_cmd, sc_cmd->result, sc_cmd->cmnd[0], 1397 sc_cmd->cmnd[2], sc_cmd->cmnd[3], sc_cmd->cmnd[4], 1398 sc_cmd->cmnd[5], sc_cmd->allowed, sc_cmd->retries, 1399 refcount); 1400 1401 /* 1402 * Set resid to the whole buffer length so we won't try to resue any 1403 * previously read data 1404 */ 1405 scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd)); 1406 1407 if (qedf_io_tracing) 1408 qedf_trace_io(io_req->fcport, io_req, QEDF_IO_TRACE_RSP); 1409 1410 io_req->sc_cmd = NULL; 1411 qedf_priv(sc_cmd)->io_req = NULL; 1412 scsi_done(sc_cmd); 1413 kref_put(&io_req->refcount, qedf_release_cmd); 1414 return; 1415 1416 bad_scsi_ptr: 1417 /* 1418 * Clear the io_req->sc_cmd backpointer so we don't try to process 1419 * this again 1420 */ 1421 io_req->sc_cmd = NULL; 1422 kref_put(&io_req->refcount, qedf_release_cmd); /* ID: 001 */ 1423 } 1424 1425 /* 1426 * Handle warning type CQE completions. This is mainly used for REC timer 1427 * popping. 1428 */ 1429 void qedf_process_warning_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1430 struct qedf_ioreq *io_req) 1431 { 1432 int rval, i; 1433 struct qedf_rport *fcport = io_req->fcport; 1434 u64 err_warn_bit_map; 1435 u8 err_warn = 0xff; 1436 1437 if (!cqe) { 1438 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1439 "cqe is NULL for io_req %p xid=0x%x\n", 1440 io_req, io_req->xid); 1441 return; 1442 } 1443 1444 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "Warning CQE, " 1445 "xid=0x%x\n", io_req->xid); 1446 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), 1447 "err_warn_bitmap=%08x:%08x\n", 1448 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_hi), 1449 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_lo)); 1450 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "tx_buff_off=%08x, " 1451 "rx_buff_off=%08x, rx_id=%04x\n", 1452 le32_to_cpu(cqe->cqe_info.err_info.tx_buf_off), 1453 le32_to_cpu(cqe->cqe_info.err_info.rx_buf_off), 1454 le32_to_cpu(cqe->cqe_info.err_info.rx_id)); 1455 1456 /* Normalize the error bitmap value to an just an unsigned int */ 1457 err_warn_bit_map = (u64) 1458 ((u64)cqe->cqe_info.err_info.err_warn_bitmap_hi << 32) | 1459 (u64)cqe->cqe_info.err_info.err_warn_bitmap_lo; 1460 for (i = 0; i < 64; i++) { 1461 if (err_warn_bit_map & (u64)((u64)1 << i)) { 1462 err_warn = i; 1463 break; 1464 } 1465 } 1466 1467 /* Check if REC TOV expired if this is a tape device */ 1468 if (fcport->dev_type == QEDF_RPORT_TYPE_TAPE) { 1469 if (err_warn == 1470 FCOE_WARNING_CODE_REC_TOV_TIMER_EXPIRATION) { 1471 QEDF_ERR(&(qedf->dbg_ctx), "REC timer expired.\n"); 1472 if (!test_bit(QEDF_CMD_SRR_SENT, &io_req->flags)) { 1473 io_req->rx_buf_off = 1474 cqe->cqe_info.err_info.rx_buf_off; 1475 io_req->tx_buf_off = 1476 cqe->cqe_info.err_info.tx_buf_off; 1477 io_req->rx_id = cqe->cqe_info.err_info.rx_id; 1478 rval = qedf_send_rec(io_req); 1479 /* 1480 * We only want to abort the io_req if we 1481 * can't queue the REC command as we want to 1482 * keep the exchange open for recovery. 1483 */ 1484 if (rval) 1485 goto send_abort; 1486 } 1487 return; 1488 } 1489 } 1490 1491 send_abort: 1492 init_completion(&io_req->abts_done); 1493 rval = qedf_initiate_abts(io_req, true); 1494 if (rval) 1495 QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n"); 1496 } 1497 1498 /* Cleanup a command when we receive an error detection completion */ 1499 void qedf_process_error_detect(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1500 struct qedf_ioreq *io_req) 1501 { 1502 int rval; 1503 1504 if (io_req == NULL) { 1505 QEDF_INFO(NULL, QEDF_LOG_IO, "io_req is NULL.\n"); 1506 return; 1507 } 1508 1509 if (io_req->fcport == NULL) { 1510 QEDF_INFO(NULL, QEDF_LOG_IO, "fcport is NULL.\n"); 1511 return; 1512 } 1513 1514 if (!cqe) { 1515 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1516 "cqe is NULL for io_req %p\n", io_req); 1517 return; 1518 } 1519 1520 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "Error detection CQE, " 1521 "xid=0x%x\n", io_req->xid); 1522 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), 1523 "err_warn_bitmap=%08x:%08x\n", 1524 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_hi), 1525 le32_to_cpu(cqe->cqe_info.err_info.err_warn_bitmap_lo)); 1526 QEDF_ERR(&(io_req->fcport->qedf->dbg_ctx), "tx_buff_off=%08x, " 1527 "rx_buff_off=%08x, rx_id=%04x\n", 1528 le32_to_cpu(cqe->cqe_info.err_info.tx_buf_off), 1529 le32_to_cpu(cqe->cqe_info.err_info.rx_buf_off), 1530 le32_to_cpu(cqe->cqe_info.err_info.rx_id)); 1531 1532 /* When flush is active, let the cmds be flushed out from the cleanup context */ 1533 if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &io_req->fcport->flags) || 1534 (test_bit(QEDF_RPORT_IN_LUN_RESET, &io_req->fcport->flags) && 1535 io_req->sc_cmd->device->lun == (u64)io_req->fcport->lun_reset_lun)) { 1536 QEDF_ERR(&qedf->dbg_ctx, 1537 "Dropping EQE for xid=0x%x as fcport is flushing", 1538 io_req->xid); 1539 return; 1540 } 1541 1542 if (qedf->stop_io_on_error) { 1543 qedf_stop_all_io(qedf); 1544 return; 1545 } 1546 1547 init_completion(&io_req->abts_done); 1548 rval = qedf_initiate_abts(io_req, true); 1549 if (rval) 1550 QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n"); 1551 } 1552 1553 static void qedf_flush_els_req(struct qedf_ctx *qedf, 1554 struct qedf_ioreq *els_req) 1555 { 1556 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1557 "Flushing ELS request xid=0x%x refcount=%d.\n", els_req->xid, 1558 kref_read(&els_req->refcount)); 1559 1560 /* 1561 * Need to distinguish this from a timeout when calling the 1562 * els_req->cb_func. 1563 */ 1564 els_req->event = QEDF_IOREQ_EV_ELS_FLUSH; 1565 1566 clear_bit(QEDF_CMD_OUTSTANDING, &els_req->flags); 1567 1568 /* Cancel the timer */ 1569 cancel_delayed_work_sync(&els_req->timeout_work); 1570 1571 /* Call callback function to complete command */ 1572 if (els_req->cb_func && els_req->cb_arg) { 1573 els_req->cb_func(els_req->cb_arg); 1574 els_req->cb_arg = NULL; 1575 } 1576 1577 /* Release kref for original initiate_els */ 1578 kref_put(&els_req->refcount, qedf_release_cmd); 1579 } 1580 1581 /* A value of -1 for lun is a wild card that means flush all 1582 * active SCSI I/Os for the target. 1583 */ 1584 void qedf_flush_active_ios(struct qedf_rport *fcport, int lun) 1585 { 1586 struct qedf_ioreq *io_req; 1587 struct qedf_ctx *qedf; 1588 struct qedf_cmd_mgr *cmd_mgr; 1589 int i, rc; 1590 unsigned long flags; 1591 int flush_cnt = 0; 1592 int wait_cnt = 100; 1593 int refcount = 0; 1594 1595 if (!fcport) { 1596 QEDF_ERR(NULL, "fcport is NULL\n"); 1597 return; 1598 } 1599 1600 /* Check that fcport is still offloaded */ 1601 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 1602 QEDF_ERR(NULL, "fcport is no longer offloaded.\n"); 1603 return; 1604 } 1605 1606 qedf = fcport->qedf; 1607 1608 if (!qedf) { 1609 QEDF_ERR(NULL, "qedf is NULL.\n"); 1610 return; 1611 } 1612 1613 /* Only wait for all commands to be queued in the Upload context */ 1614 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags) && 1615 (lun == -1)) { 1616 while (atomic_read(&fcport->ios_to_queue)) { 1617 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1618 "Waiting for %d I/Os to be queued\n", 1619 atomic_read(&fcport->ios_to_queue)); 1620 if (wait_cnt == 0) { 1621 QEDF_ERR(NULL, 1622 "%d IOs request could not be queued\n", 1623 atomic_read(&fcport->ios_to_queue)); 1624 } 1625 msleep(20); 1626 wait_cnt--; 1627 } 1628 } 1629 1630 cmd_mgr = qedf->cmd_mgr; 1631 1632 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1633 "Flush active i/o's num=0x%x fcport=0x%p port_id=0x%06x scsi_id=%d.\n", 1634 atomic_read(&fcport->num_active_ios), fcport, 1635 fcport->rdata->ids.port_id, fcport->rport->scsi_target_id); 1636 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Locking flush mutex.\n"); 1637 1638 mutex_lock(&qedf->flush_mutex); 1639 if (lun == -1) { 1640 set_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags); 1641 } else { 1642 set_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags); 1643 fcport->lun_reset_lun = lun; 1644 } 1645 1646 for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) { 1647 io_req = &cmd_mgr->cmds[i]; 1648 1649 if (!io_req) 1650 continue; 1651 if (!io_req->fcport) 1652 continue; 1653 1654 spin_lock_irqsave(&cmd_mgr->lock, flags); 1655 1656 if (io_req->alloc) { 1657 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags)) { 1658 if (io_req->cmd_type == QEDF_SCSI_CMD) 1659 QEDF_ERR(&qedf->dbg_ctx, 1660 "Allocated but not queued, xid=0x%x\n", 1661 io_req->xid); 1662 } 1663 spin_unlock_irqrestore(&cmd_mgr->lock, flags); 1664 } else { 1665 spin_unlock_irqrestore(&cmd_mgr->lock, flags); 1666 continue; 1667 } 1668 1669 if (io_req->fcport != fcport) 1670 continue; 1671 1672 /* In case of ABTS, CMD_OUTSTANDING is cleared on ABTS response, 1673 * but RRQ is still pending. 1674 * Workaround: Within qedf_send_rrq, we check if the fcport is 1675 * NULL, and we drop the ref on the io_req to clean it up. 1676 */ 1677 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags)) { 1678 refcount = kref_read(&io_req->refcount); 1679 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1680 "Not outstanding, xid=0x%x, cmd_type=%d refcount=%d.\n", 1681 io_req->xid, io_req->cmd_type, refcount); 1682 /* If RRQ work has been queue, try to cancel it and 1683 * free the io_req 1684 */ 1685 if (atomic_read(&io_req->state) == 1686 QEDFC_CMD_ST_RRQ_WAIT) { 1687 if (cancel_delayed_work_sync 1688 (&io_req->rrq_work)) { 1689 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1690 "Putting reference for pending RRQ work xid=0x%x.\n", 1691 io_req->xid); 1692 /* ID: 003 */ 1693 kref_put(&io_req->refcount, 1694 qedf_release_cmd); 1695 } 1696 } 1697 continue; 1698 } 1699 1700 /* Only consider flushing ELS during target reset */ 1701 if (io_req->cmd_type == QEDF_ELS && 1702 lun == -1) { 1703 rc = kref_get_unless_zero(&io_req->refcount); 1704 if (!rc) { 1705 QEDF_ERR(&(qedf->dbg_ctx), 1706 "Could not get kref for ELS io_req=0x%p xid=0x%x.\n", 1707 io_req, io_req->xid); 1708 continue; 1709 } 1710 qedf_initiate_cleanup(io_req, false); 1711 flush_cnt++; 1712 qedf_flush_els_req(qedf, io_req); 1713 1714 /* 1715 * Release the kref and go back to the top of the 1716 * loop. 1717 */ 1718 goto free_cmd; 1719 } 1720 1721 if (io_req->cmd_type == QEDF_ABTS) { 1722 /* ID: 004 */ 1723 rc = kref_get_unless_zero(&io_req->refcount); 1724 if (!rc) { 1725 QEDF_ERR(&(qedf->dbg_ctx), 1726 "Could not get kref for abort io_req=0x%p xid=0x%x.\n", 1727 io_req, io_req->xid); 1728 continue; 1729 } 1730 if (lun != -1 && io_req->lun != lun) 1731 goto free_cmd; 1732 1733 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1734 "Flushing abort xid=0x%x.\n", io_req->xid); 1735 1736 if (cancel_delayed_work_sync(&io_req->rrq_work)) { 1737 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1738 "Putting ref for cancelled RRQ work xid=0x%x.\n", 1739 io_req->xid); 1740 kref_put(&io_req->refcount, qedf_release_cmd); 1741 } 1742 1743 if (cancel_delayed_work_sync(&io_req->timeout_work)) { 1744 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1745 "Putting ref for cancelled tmo work xid=0x%x.\n", 1746 io_req->xid); 1747 qedf_initiate_cleanup(io_req, true); 1748 /* Notify eh_abort handler that ABTS is 1749 * complete 1750 */ 1751 complete(&io_req->abts_done); 1752 clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 1753 /* ID: 002 */ 1754 kref_put(&io_req->refcount, qedf_release_cmd); 1755 } 1756 flush_cnt++; 1757 goto free_cmd; 1758 } 1759 1760 if (!io_req->sc_cmd) 1761 continue; 1762 if (!io_req->sc_cmd->device) { 1763 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1764 "Device backpointer NULL for sc_cmd=%p.\n", 1765 io_req->sc_cmd); 1766 /* Put reference for non-existent scsi_cmnd */ 1767 io_req->sc_cmd = NULL; 1768 qedf_initiate_cleanup(io_req, false); 1769 kref_put(&io_req->refcount, qedf_release_cmd); 1770 continue; 1771 } 1772 if (lun > -1) { 1773 if (io_req->lun != lun) 1774 continue; 1775 } 1776 1777 /* 1778 * Use kref_get_unless_zero in the unlikely case the command 1779 * we're about to flush was completed in the normal SCSI path 1780 */ 1781 rc = kref_get_unless_zero(&io_req->refcount); 1782 if (!rc) { 1783 QEDF_ERR(&(qedf->dbg_ctx), "Could not get kref for " 1784 "io_req=0x%p xid=0x%x\n", io_req, io_req->xid); 1785 continue; 1786 } 1787 1788 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, 1789 "Cleanup xid=0x%x.\n", io_req->xid); 1790 flush_cnt++; 1791 1792 /* Cleanup task and return I/O mid-layer */ 1793 qedf_initiate_cleanup(io_req, true); 1794 1795 free_cmd: 1796 kref_put(&io_req->refcount, qedf_release_cmd); /* ID: 004 */ 1797 } 1798 1799 wait_cnt = 60; 1800 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1801 "Flushed 0x%x I/Os, active=0x%x.\n", 1802 flush_cnt, atomic_read(&fcport->num_active_ios)); 1803 /* Only wait for all commands to complete in the Upload context */ 1804 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags) && 1805 (lun == -1)) { 1806 while (atomic_read(&fcport->num_active_ios)) { 1807 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1808 "Flushed 0x%x I/Os, active=0x%x cnt=%d.\n", 1809 flush_cnt, 1810 atomic_read(&fcport->num_active_ios), 1811 wait_cnt); 1812 if (wait_cnt == 0) { 1813 QEDF_ERR(&qedf->dbg_ctx, 1814 "Flushed %d I/Os, active=%d.\n", 1815 flush_cnt, 1816 atomic_read(&fcport->num_active_ios)); 1817 for (i = 0; i < FCOE_PARAMS_NUM_TASKS; i++) { 1818 io_req = &cmd_mgr->cmds[i]; 1819 if (io_req->fcport && 1820 io_req->fcport == fcport) { 1821 refcount = 1822 kref_read(&io_req->refcount); 1823 set_bit(QEDF_CMD_DIRTY, 1824 &io_req->flags); 1825 QEDF_ERR(&qedf->dbg_ctx, 1826 "Outstanding io_req =%p xid=0x%x flags=0x%lx, sc_cmd=%p refcount=%d cmd_type=%d.\n", 1827 io_req, io_req->xid, 1828 io_req->flags, 1829 io_req->sc_cmd, 1830 refcount, 1831 io_req->cmd_type); 1832 } 1833 } 1834 WARN_ON(1); 1835 break; 1836 } 1837 msleep(500); 1838 wait_cnt--; 1839 } 1840 } 1841 1842 clear_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags); 1843 clear_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags); 1844 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, "Unlocking flush mutex.\n"); 1845 mutex_unlock(&qedf->flush_mutex); 1846 } 1847 1848 /* 1849 * Initiate a ABTS middle path command. Note that we don't have to initialize 1850 * the task context for an ABTS task. 1851 */ 1852 int qedf_initiate_abts(struct qedf_ioreq *io_req, bool return_scsi_cmd_on_abts) 1853 { 1854 struct fc_lport *lport; 1855 struct qedf_rport *fcport = io_req->fcport; 1856 struct fc_rport_priv *rdata; 1857 struct qedf_ctx *qedf; 1858 u16 xid; 1859 int rc = 0; 1860 unsigned long flags; 1861 struct fcoe_wqe *sqe; 1862 u16 sqe_idx; 1863 int refcount = 0; 1864 1865 /* Sanity check qedf_rport before dereferencing any pointers */ 1866 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 1867 QEDF_ERR(NULL, "tgt not offloaded\n"); 1868 rc = 1; 1869 goto out; 1870 } 1871 1872 qedf = fcport->qedf; 1873 rdata = fcport->rdata; 1874 1875 if (!rdata || !kref_get_unless_zero(&rdata->kref)) { 1876 QEDF_ERR(&qedf->dbg_ctx, "stale rport\n"); 1877 rc = 1; 1878 goto out; 1879 } 1880 1881 lport = qedf->lport; 1882 1883 if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 1884 QEDF_ERR(&(qedf->dbg_ctx), "link is not ready\n"); 1885 rc = 1; 1886 goto drop_rdata_kref; 1887 } 1888 1889 if (atomic_read(&qedf->link_down_tmo_valid) > 0) { 1890 QEDF_ERR(&(qedf->dbg_ctx), "link_down_tmo active.\n"); 1891 rc = 1; 1892 goto drop_rdata_kref; 1893 } 1894 1895 /* Ensure room on SQ */ 1896 if (!atomic_read(&fcport->free_sqes)) { 1897 QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n"); 1898 rc = 1; 1899 goto drop_rdata_kref; 1900 } 1901 1902 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 1903 QEDF_ERR(&qedf->dbg_ctx, "fcport is uploading.\n"); 1904 rc = 1; 1905 goto drop_rdata_kref; 1906 } 1907 1908 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || 1909 test_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags) || 1910 test_bit(QEDF_CMD_IN_ABORT, &io_req->flags)) { 1911 QEDF_ERR(&qedf->dbg_ctx, 1912 "io_req xid=0x%x sc_cmd=%p already in cleanup or abort processing or already completed.\n", 1913 io_req->xid, io_req->sc_cmd); 1914 rc = 1; 1915 goto drop_rdata_kref; 1916 } 1917 1918 kref_get(&io_req->refcount); 1919 1920 xid = io_req->xid; 1921 qedf->control_requests++; 1922 qedf->packet_aborts++; 1923 1924 /* Set the command type to abort */ 1925 io_req->cmd_type = QEDF_ABTS; 1926 io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts; 1927 1928 set_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 1929 refcount = kref_read(&io_req->refcount); 1930 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 1931 "ABTS io_req xid = 0x%x refcount=%d\n", 1932 xid, refcount); 1933 1934 qedf_cmd_timer_set(qedf, io_req, QEDF_ABORT_TIMEOUT); 1935 1936 spin_lock_irqsave(&fcport->rport_lock, flags); 1937 1938 sqe_idx = qedf_get_sqe_idx(fcport); 1939 sqe = &fcport->sq[sqe_idx]; 1940 memset(sqe, 0, sizeof(struct fcoe_wqe)); 1941 io_req->task_params->sqe = sqe; 1942 1943 init_initiator_abort_fcoe_task(io_req->task_params); 1944 qedf_ring_doorbell(fcport); 1945 1946 spin_unlock_irqrestore(&fcport->rport_lock, flags); 1947 1948 drop_rdata_kref: 1949 kref_put(&rdata->kref, fc_rport_destroy); 1950 out: 1951 return rc; 1952 } 1953 1954 void qedf_process_abts_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 1955 struct qedf_ioreq *io_req) 1956 { 1957 uint32_t r_ctl; 1958 int rc; 1959 struct qedf_rport *fcport = io_req->fcport; 1960 1961 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "Entered with xid = " 1962 "0x%x cmd_type = %d\n", io_req->xid, io_req->cmd_type); 1963 1964 r_ctl = cqe->cqe_info.abts_info.r_ctl; 1965 1966 /* This was added at a point when we were scheduling abts_compl & 1967 * cleanup_compl on different CPUs and there was a possibility of 1968 * the io_req to be freed from the other context before we got here. 1969 */ 1970 if (!fcport) { 1971 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1972 "Dropping ABTS completion xid=0x%x as fcport is NULL", 1973 io_req->xid); 1974 return; 1975 } 1976 1977 /* 1978 * When flush is active, let the cmds be completed from the cleanup 1979 * context 1980 */ 1981 if (test_bit(QEDF_RPORT_IN_TARGET_RESET, &fcport->flags) || 1982 test_bit(QEDF_RPORT_IN_LUN_RESET, &fcport->flags)) { 1983 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 1984 "Dropping ABTS completion xid=0x%x as fcport is flushing", 1985 io_req->xid); 1986 return; 1987 } 1988 1989 if (!cancel_delayed_work(&io_req->timeout_work)) { 1990 QEDF_ERR(&qedf->dbg_ctx, 1991 "Wasn't able to cancel abts timeout work.\n"); 1992 } 1993 1994 switch (r_ctl) { 1995 case FC_RCTL_BA_ACC: 1996 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, 1997 "ABTS response - ACC Send RRQ after R_A_TOV\n"); 1998 io_req->event = QEDF_IOREQ_EV_ABORT_SUCCESS; 1999 rc = kref_get_unless_zero(&io_req->refcount); /* ID: 003 */ 2000 if (!rc) { 2001 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 2002 "kref is already zero so ABTS was already completed or flushed xid=0x%x.\n", 2003 io_req->xid); 2004 return; 2005 } 2006 /* 2007 * Dont release this cmd yet. It will be relesed 2008 * after we get RRQ response 2009 */ 2010 queue_delayed_work(qedf->dpc_wq, &io_req->rrq_work, 2011 msecs_to_jiffies(qedf->lport->r_a_tov)); 2012 atomic_set(&io_req->state, QEDFC_CMD_ST_RRQ_WAIT); 2013 break; 2014 /* For error cases let the cleanup return the command */ 2015 case FC_RCTL_BA_RJT: 2016 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, 2017 "ABTS response - RJT\n"); 2018 io_req->event = QEDF_IOREQ_EV_ABORT_FAILED; 2019 break; 2020 default: 2021 QEDF_ERR(&(qedf->dbg_ctx), "Unknown ABTS response\n"); 2022 break; 2023 } 2024 2025 clear_bit(QEDF_CMD_IN_ABORT, &io_req->flags); 2026 2027 if (io_req->sc_cmd) { 2028 if (!io_req->return_scsi_cmd_on_abts) 2029 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 2030 "Not call scsi_done for xid=0x%x.\n", 2031 io_req->xid); 2032 if (io_req->return_scsi_cmd_on_abts) 2033 qedf_scsi_done(qedf, io_req, DID_ERROR); 2034 } 2035 2036 /* Notify eh_abort handler that ABTS is complete */ 2037 complete(&io_req->abts_done); 2038 2039 kref_put(&io_req->refcount, qedf_release_cmd); 2040 } 2041 2042 int qedf_init_mp_req(struct qedf_ioreq *io_req) 2043 { 2044 struct qedf_mp_req *mp_req; 2045 struct scsi_sge *mp_req_bd; 2046 struct scsi_sge *mp_resp_bd; 2047 struct qedf_ctx *qedf = io_req->fcport->qedf; 2048 dma_addr_t addr; 2049 uint64_t sz; 2050 2051 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_MP_REQ, "Entered.\n"); 2052 2053 mp_req = (struct qedf_mp_req *)&(io_req->mp_req); 2054 memset(mp_req, 0, sizeof(struct qedf_mp_req)); 2055 2056 if (io_req->cmd_type != QEDF_ELS) { 2057 mp_req->req_len = sizeof(struct fcp_cmnd); 2058 io_req->data_xfer_len = mp_req->req_len; 2059 } else 2060 mp_req->req_len = io_req->data_xfer_len; 2061 2062 mp_req->req_buf = dma_alloc_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE, 2063 &mp_req->req_buf_dma, GFP_KERNEL); 2064 if (!mp_req->req_buf) { 2065 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP req buffer\n"); 2066 qedf_free_mp_resc(io_req); 2067 return -ENOMEM; 2068 } 2069 2070 mp_req->resp_buf = dma_alloc_coherent(&qedf->pdev->dev, 2071 QEDF_PAGE_SIZE, &mp_req->resp_buf_dma, GFP_KERNEL); 2072 if (!mp_req->resp_buf) { 2073 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc TM resp " 2074 "buffer\n"); 2075 qedf_free_mp_resc(io_req); 2076 return -ENOMEM; 2077 } 2078 2079 /* Allocate and map mp_req_bd and mp_resp_bd */ 2080 sz = sizeof(struct scsi_sge); 2081 mp_req->mp_req_bd = dma_alloc_coherent(&qedf->pdev->dev, sz, 2082 &mp_req->mp_req_bd_dma, GFP_KERNEL); 2083 if (!mp_req->mp_req_bd) { 2084 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP req bd\n"); 2085 qedf_free_mp_resc(io_req); 2086 return -ENOMEM; 2087 } 2088 2089 mp_req->mp_resp_bd = dma_alloc_coherent(&qedf->pdev->dev, sz, 2090 &mp_req->mp_resp_bd_dma, GFP_KERNEL); 2091 if (!mp_req->mp_resp_bd) { 2092 QEDF_ERR(&(qedf->dbg_ctx), "Unable to alloc MP resp bd\n"); 2093 qedf_free_mp_resc(io_req); 2094 return -ENOMEM; 2095 } 2096 2097 /* Fill bd table */ 2098 addr = mp_req->req_buf_dma; 2099 mp_req_bd = mp_req->mp_req_bd; 2100 mp_req_bd->sge_addr.lo = U64_LO(addr); 2101 mp_req_bd->sge_addr.hi = U64_HI(addr); 2102 mp_req_bd->sge_len = QEDF_PAGE_SIZE; 2103 2104 /* 2105 * MP buffer is either a task mgmt command or an ELS. 2106 * So the assumption is that it consumes a single bd 2107 * entry in the bd table 2108 */ 2109 mp_resp_bd = mp_req->mp_resp_bd; 2110 addr = mp_req->resp_buf_dma; 2111 mp_resp_bd->sge_addr.lo = U64_LO(addr); 2112 mp_resp_bd->sge_addr.hi = U64_HI(addr); 2113 mp_resp_bd->sge_len = QEDF_PAGE_SIZE; 2114 2115 return 0; 2116 } 2117 2118 /* 2119 * Last ditch effort to clear the port if it's stuck. Used only after a 2120 * cleanup task times out. 2121 */ 2122 static void qedf_drain_request(struct qedf_ctx *qedf) 2123 { 2124 if (test_bit(QEDF_DRAIN_ACTIVE, &qedf->flags)) { 2125 QEDF_ERR(&(qedf->dbg_ctx), "MCP drain already active.\n"); 2126 return; 2127 } 2128 2129 /* Set bit to return all queuecommand requests as busy */ 2130 set_bit(QEDF_DRAIN_ACTIVE, &qedf->flags); 2131 2132 /* Call qed drain request for function. Should be synchronous */ 2133 qed_ops->common->drain(qedf->cdev); 2134 2135 /* Settle time for CQEs to be returned */ 2136 msleep(100); 2137 2138 /* Unplug and continue */ 2139 clear_bit(QEDF_DRAIN_ACTIVE, &qedf->flags); 2140 } 2141 2142 /* 2143 * Returns SUCCESS if the cleanup task does not timeout, otherwise return 2144 * FAILURE. 2145 */ 2146 int qedf_initiate_cleanup(struct qedf_ioreq *io_req, 2147 bool return_scsi_cmd_on_abts) 2148 { 2149 struct qedf_rport *fcport; 2150 struct qedf_ctx *qedf; 2151 int tmo = 0; 2152 int rc = SUCCESS; 2153 unsigned long flags; 2154 struct fcoe_wqe *sqe; 2155 u16 sqe_idx; 2156 int refcount = 0; 2157 2158 fcport = io_req->fcport; 2159 if (!fcport) { 2160 QEDF_ERR(NULL, "fcport is NULL.\n"); 2161 return SUCCESS; 2162 } 2163 2164 /* Sanity check qedf_rport before dereferencing any pointers */ 2165 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 2166 QEDF_ERR(NULL, "tgt not offloaded\n"); 2167 return SUCCESS; 2168 } 2169 2170 qedf = fcport->qedf; 2171 if (!qedf) { 2172 QEDF_ERR(NULL, "qedf is NULL.\n"); 2173 return SUCCESS; 2174 } 2175 2176 if (io_req->cmd_type == QEDF_ELS) { 2177 goto process_els; 2178 } 2179 2180 if (!test_bit(QEDF_CMD_OUTSTANDING, &io_req->flags) || 2181 test_and_set_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags)) { 2182 QEDF_ERR(&(qedf->dbg_ctx), "io_req xid=0x%x already in " 2183 "cleanup processing or already completed.\n", 2184 io_req->xid); 2185 return SUCCESS; 2186 } 2187 set_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2188 2189 process_els: 2190 /* Ensure room on SQ */ 2191 if (!atomic_read(&fcport->free_sqes)) { 2192 QEDF_ERR(&(qedf->dbg_ctx), "No SQ entries available\n"); 2193 /* Need to make sure we clear the flag since it was set */ 2194 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2195 return FAILED; 2196 } 2197 2198 if (io_req->cmd_type == QEDF_CLEANUP) { 2199 QEDF_ERR(&qedf->dbg_ctx, 2200 "io_req=0x%x is already a cleanup command cmd_type=%d.\n", 2201 io_req->xid, io_req->cmd_type); 2202 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2203 return SUCCESS; 2204 } 2205 2206 refcount = kref_read(&io_req->refcount); 2207 2208 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_IO, 2209 "Entered xid=0x%x sc_cmd=%p cmd_type=%d flags=0x%lx refcount=%d fcport=%p port_id=0x%06x\n", 2210 io_req->xid, io_req->sc_cmd, io_req->cmd_type, io_req->flags, 2211 refcount, fcport, fcport->rdata->ids.port_id); 2212 2213 /* Cleanup cmds re-use the same TID as the original I/O */ 2214 io_req->cmd_type = QEDF_CLEANUP; 2215 io_req->return_scsi_cmd_on_abts = return_scsi_cmd_on_abts; 2216 2217 init_completion(&io_req->cleanup_done); 2218 2219 spin_lock_irqsave(&fcport->rport_lock, flags); 2220 2221 sqe_idx = qedf_get_sqe_idx(fcport); 2222 sqe = &fcport->sq[sqe_idx]; 2223 memset(sqe, 0, sizeof(struct fcoe_wqe)); 2224 io_req->task_params->sqe = sqe; 2225 2226 init_initiator_cleanup_fcoe_task(io_req->task_params); 2227 qedf_ring_doorbell(fcport); 2228 2229 spin_unlock_irqrestore(&fcport->rport_lock, flags); 2230 2231 tmo = wait_for_completion_timeout(&io_req->cleanup_done, 2232 QEDF_CLEANUP_TIMEOUT * HZ); 2233 2234 if (!tmo) { 2235 rc = FAILED; 2236 /* Timeout case */ 2237 QEDF_ERR(&(qedf->dbg_ctx), "Cleanup command timeout, " 2238 "xid=%x.\n", io_req->xid); 2239 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2240 /* Issue a drain request if cleanup task times out */ 2241 QEDF_ERR(&(qedf->dbg_ctx), "Issuing MCP drain request.\n"); 2242 qedf_drain_request(qedf); 2243 } 2244 2245 /* If it TASK MGMT handle it, reference will be decreased 2246 * in qedf_execute_tmf 2247 */ 2248 if (io_req->tm_flags == FCP_TMF_LUN_RESET || 2249 io_req->tm_flags == FCP_TMF_TGT_RESET) { 2250 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2251 io_req->sc_cmd = NULL; 2252 kref_put(&io_req->refcount, qedf_release_cmd); 2253 complete(&io_req->tm_done); 2254 } 2255 2256 if (io_req->sc_cmd) { 2257 if (!io_req->return_scsi_cmd_on_abts) 2258 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_SCSI_TM, 2259 "Not call scsi_done for xid=0x%x.\n", 2260 io_req->xid); 2261 if (io_req->return_scsi_cmd_on_abts) 2262 qedf_scsi_done(qedf, io_req, DID_ERROR); 2263 } 2264 2265 if (rc == SUCCESS) 2266 io_req->event = QEDF_IOREQ_EV_CLEANUP_SUCCESS; 2267 else 2268 io_req->event = QEDF_IOREQ_EV_CLEANUP_FAILED; 2269 2270 return rc; 2271 } 2272 2273 void qedf_process_cleanup_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 2274 struct qedf_ioreq *io_req) 2275 { 2276 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO, "Entered xid = 0x%x\n", 2277 io_req->xid); 2278 2279 clear_bit(QEDF_CMD_IN_CLEANUP, &io_req->flags); 2280 2281 /* Complete so we can finish cleaning up the I/O */ 2282 complete(&io_req->cleanup_done); 2283 } 2284 2285 static int qedf_execute_tmf(struct qedf_rport *fcport, struct scsi_cmnd *sc_cmd, 2286 uint8_t tm_flags) 2287 { 2288 struct qedf_ioreq *io_req; 2289 struct fcoe_task_context *task; 2290 struct qedf_ctx *qedf = fcport->qedf; 2291 struct fc_lport *lport = qedf->lport; 2292 int rc = 0; 2293 uint16_t xid; 2294 int tmo = 0; 2295 int lun = 0; 2296 unsigned long flags; 2297 struct fcoe_wqe *sqe; 2298 u16 sqe_idx; 2299 2300 if (!sc_cmd) { 2301 QEDF_ERR(&qedf->dbg_ctx, "sc_cmd is NULL\n"); 2302 return FAILED; 2303 } 2304 2305 lun = (int)sc_cmd->device->lun; 2306 if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) { 2307 QEDF_ERR(&(qedf->dbg_ctx), "fcport not offloaded\n"); 2308 rc = FAILED; 2309 goto no_flush; 2310 } 2311 2312 io_req = qedf_alloc_cmd(fcport, QEDF_TASK_MGMT_CMD); 2313 if (!io_req) { 2314 QEDF_ERR(&(qedf->dbg_ctx), "Failed TMF"); 2315 rc = -EAGAIN; 2316 goto no_flush; 2317 } 2318 2319 if (tm_flags == FCP_TMF_LUN_RESET) 2320 qedf->lun_resets++; 2321 else if (tm_flags == FCP_TMF_TGT_RESET) 2322 qedf->target_resets++; 2323 2324 /* Initialize rest of io_req fields */ 2325 io_req->sc_cmd = sc_cmd; 2326 io_req->fcport = fcport; 2327 io_req->cmd_type = QEDF_TASK_MGMT_CMD; 2328 2329 /* Record which cpu this request is associated with */ 2330 io_req->cpu = smp_processor_id(); 2331 2332 /* Set TM flags */ 2333 io_req->io_req_flags = QEDF_READ; 2334 io_req->data_xfer_len = 0; 2335 io_req->tm_flags = tm_flags; 2336 2337 /* Default is to return a SCSI command when an error occurs */ 2338 io_req->return_scsi_cmd_on_abts = false; 2339 2340 /* Obtain exchange id */ 2341 xid = io_req->xid; 2342 2343 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_SCSI_TM, "TMF io_req xid = " 2344 "0x%x\n", xid); 2345 2346 /* Initialize task context for this IO request */ 2347 task = qedf_get_task_mem(&qedf->tasks, xid); 2348 2349 init_completion(&io_req->tm_done); 2350 2351 spin_lock_irqsave(&fcport->rport_lock, flags); 2352 2353 sqe_idx = qedf_get_sqe_idx(fcport); 2354 sqe = &fcport->sq[sqe_idx]; 2355 memset(sqe, 0, sizeof(struct fcoe_wqe)); 2356 2357 qedf_init_task(fcport, lport, io_req, task, sqe); 2358 qedf_ring_doorbell(fcport); 2359 2360 spin_unlock_irqrestore(&fcport->rport_lock, flags); 2361 2362 set_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2363 tmo = wait_for_completion_timeout(&io_req->tm_done, 2364 QEDF_TM_TIMEOUT * HZ); 2365 2366 if (!tmo) { 2367 rc = FAILED; 2368 QEDF_ERR(&(qedf->dbg_ctx), "wait for tm_cmpl timeout!\n"); 2369 /* Clear outstanding bit since command timed out */ 2370 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2371 io_req->sc_cmd = NULL; 2372 } else { 2373 /* Check TMF response code */ 2374 if (io_req->fcp_rsp_code == 0) 2375 rc = SUCCESS; 2376 else 2377 rc = FAILED; 2378 } 2379 /* 2380 * Double check that fcport has not gone into an uploading state before 2381 * executing the command flush for the LUN/target. 2382 */ 2383 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 2384 QEDF_ERR(&qedf->dbg_ctx, 2385 "fcport is uploading, not executing flush.\n"); 2386 goto no_flush; 2387 } 2388 /* We do not need this io_req any more */ 2389 kref_put(&io_req->refcount, qedf_release_cmd); 2390 2391 2392 if (tm_flags == FCP_TMF_LUN_RESET) 2393 qedf_flush_active_ios(fcport, lun); 2394 else 2395 qedf_flush_active_ios(fcport, -1); 2396 2397 no_flush: 2398 if (rc != SUCCESS) { 2399 QEDF_ERR(&(qedf->dbg_ctx), "task mgmt command failed...\n"); 2400 rc = FAILED; 2401 } else { 2402 QEDF_ERR(&(qedf->dbg_ctx), "task mgmt command success...\n"); 2403 rc = SUCCESS; 2404 } 2405 return rc; 2406 } 2407 2408 int qedf_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags) 2409 { 2410 struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); 2411 struct fc_rport_libfc_priv *rp = rport->dd_data; 2412 struct qedf_rport *fcport = (struct qedf_rport *)&rp[1]; 2413 struct qedf_ctx *qedf; 2414 struct fc_lport *lport = shost_priv(sc_cmd->device->host); 2415 int rc = SUCCESS; 2416 int rval; 2417 struct qedf_ioreq *io_req = NULL; 2418 int ref_cnt = 0; 2419 struct fc_rport_priv *rdata = fcport->rdata; 2420 2421 QEDF_ERR(NULL, 2422 "tm_flags 0x%x sc_cmd %p op = 0x%02x target_id = 0x%x lun=%d\n", 2423 tm_flags, sc_cmd, sc_cmd->cmd_len ? sc_cmd->cmnd[0] : 0xff, 2424 rport->scsi_target_id, (int)sc_cmd->device->lun); 2425 2426 if (!rdata || !kref_get_unless_zero(&rdata->kref)) { 2427 QEDF_ERR(NULL, "stale rport\n"); 2428 return FAILED; 2429 } 2430 2431 QEDF_ERR(NULL, "portid=%06x tm_flags =%s\n", rdata->ids.port_id, 2432 (tm_flags == FCP_TMF_TGT_RESET) ? "TARGET RESET" : 2433 "LUN RESET"); 2434 2435 if (qedf_priv(sc_cmd)->io_req) { 2436 io_req = qedf_priv(sc_cmd)->io_req; 2437 ref_cnt = kref_read(&io_req->refcount); 2438 QEDF_ERR(NULL, 2439 "orig io_req = %p xid = 0x%x ref_cnt = %d.\n", 2440 io_req, io_req->xid, ref_cnt); 2441 } 2442 2443 rval = fc_remote_port_chkready(rport); 2444 if (rval) { 2445 QEDF_ERR(NULL, "device_reset rport not ready\n"); 2446 rc = FAILED; 2447 goto tmf_err; 2448 } 2449 2450 rc = fc_block_scsi_eh(sc_cmd); 2451 if (rc) 2452 goto tmf_err; 2453 2454 if (!fcport) { 2455 QEDF_ERR(NULL, "device_reset: rport is NULL\n"); 2456 rc = FAILED; 2457 goto tmf_err; 2458 } 2459 2460 qedf = fcport->qedf; 2461 2462 if (!qedf) { 2463 QEDF_ERR(NULL, "qedf is NULL.\n"); 2464 rc = FAILED; 2465 goto tmf_err; 2466 } 2467 2468 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 2469 QEDF_ERR(&qedf->dbg_ctx, "Connection is getting uploaded.\n"); 2470 rc = SUCCESS; 2471 goto tmf_err; 2472 } 2473 2474 if (test_bit(QEDF_UNLOADING, &qedf->flags) || 2475 test_bit(QEDF_DBG_STOP_IO, &qedf->flags)) { 2476 rc = SUCCESS; 2477 goto tmf_err; 2478 } 2479 2480 if (lport->state != LPORT_ST_READY || !(lport->link_up)) { 2481 QEDF_ERR(&(qedf->dbg_ctx), "link is not ready\n"); 2482 rc = FAILED; 2483 goto tmf_err; 2484 } 2485 2486 if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) { 2487 if (!fcport->rdata) 2488 QEDF_ERR(&qedf->dbg_ctx, "fcport %p is uploading.\n", 2489 fcport); 2490 else 2491 QEDF_ERR(&qedf->dbg_ctx, 2492 "fcport %p port_id=%06x is uploading.\n", 2493 fcport, fcport->rdata->ids.port_id); 2494 rc = FAILED; 2495 goto tmf_err; 2496 } 2497 2498 rc = qedf_execute_tmf(fcport, sc_cmd, tm_flags); 2499 2500 tmf_err: 2501 kref_put(&rdata->kref, fc_rport_destroy); 2502 return rc; 2503 } 2504 2505 void qedf_process_tmf_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe, 2506 struct qedf_ioreq *io_req) 2507 { 2508 struct fcoe_cqe_rsp_info *fcp_rsp; 2509 2510 clear_bit(QEDF_CMD_OUTSTANDING, &io_req->flags); 2511 2512 fcp_rsp = &cqe->cqe_info.rsp_info; 2513 qedf_parse_fcp_rsp(io_req, fcp_rsp); 2514 2515 io_req->sc_cmd = NULL; 2516 complete(&io_req->tm_done); 2517 } 2518 2519 void qedf_process_unsol_compl(struct qedf_ctx *qedf, uint16_t que_idx, 2520 struct fcoe_cqe *cqe) 2521 { 2522 unsigned long flags; 2523 uint16_t pktlen = cqe->cqe_info.unsolic_info.pkt_len; 2524 u32 payload_len, crc; 2525 struct fc_frame_header *fh; 2526 struct fc_frame *fp; 2527 struct qedf_io_work *io_work; 2528 u32 bdq_idx; 2529 void *bdq_addr; 2530 struct scsi_bd *p_bd_info; 2531 2532 p_bd_info = &cqe->cqe_info.unsolic_info.bd_info; 2533 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL, 2534 "address.hi=%x, address.lo=%x, opaque_data.hi=%x, opaque_data.lo=%x, bdq_prod_idx=%u, len=%u\n", 2535 le32_to_cpu(p_bd_info->address.hi), 2536 le32_to_cpu(p_bd_info->address.lo), 2537 le32_to_cpu(p_bd_info->opaque.fcoe_opaque.hi), 2538 le32_to_cpu(p_bd_info->opaque.fcoe_opaque.lo), 2539 qedf->bdq_prod_idx, pktlen); 2540 2541 bdq_idx = le32_to_cpu(p_bd_info->opaque.fcoe_opaque.lo); 2542 if (bdq_idx >= QEDF_BDQ_SIZE) { 2543 QEDF_ERR(&(qedf->dbg_ctx), "bdq_idx is out of range %d.\n", 2544 bdq_idx); 2545 goto increment_prod; 2546 } 2547 2548 bdq_addr = qedf->bdq[bdq_idx].buf_addr; 2549 if (!bdq_addr) { 2550 QEDF_ERR(&(qedf->dbg_ctx), "bdq_addr is NULL, dropping " 2551 "unsolicited packet.\n"); 2552 goto increment_prod; 2553 } 2554 2555 if (qedf_dump_frames) { 2556 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL, 2557 "BDQ frame is at addr=%p.\n", bdq_addr); 2558 print_hex_dump(KERN_WARNING, "bdq ", DUMP_PREFIX_OFFSET, 16, 1, 2559 (void *)bdq_addr, pktlen, false); 2560 } 2561 2562 /* Allocate frame */ 2563 payload_len = pktlen - sizeof(struct fc_frame_header); 2564 fp = fc_frame_alloc(qedf->lport, payload_len); 2565 if (!fp) { 2566 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate fp.\n"); 2567 goto increment_prod; 2568 } 2569 2570 /* Copy data from BDQ buffer into fc_frame struct */ 2571 fh = (struct fc_frame_header *)fc_frame_header_get(fp); 2572 memcpy(fh, (void *)bdq_addr, pktlen); 2573 2574 QEDF_WARN(&qedf->dbg_ctx, 2575 "Processing Unsolicated frame, src=%06x dest=%06x r_ctl=0x%x type=0x%x cmd=%02x\n", 2576 ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl, 2577 fh->fh_type, fc_frame_payload_op(fp)); 2578 2579 /* Initialize the frame so libfc sees it as a valid frame */ 2580 crc = fcoe_fc_crc(fp); 2581 fc_frame_init(fp); 2582 fr_dev(fp) = qedf->lport; 2583 fr_sof(fp) = FC_SOF_I3; 2584 fr_eof(fp) = FC_EOF_T; 2585 fr_crc(fp) = cpu_to_le32(~crc); 2586 2587 /* 2588 * We need to return the frame back up to libfc in a non-atomic 2589 * context 2590 */ 2591 io_work = mempool_alloc(qedf->io_mempool, GFP_ATOMIC); 2592 if (!io_work) { 2593 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate " 2594 "work for I/O completion.\n"); 2595 fc_frame_free(fp); 2596 goto increment_prod; 2597 } 2598 memset(io_work, 0, sizeof(struct qedf_io_work)); 2599 2600 INIT_WORK(&io_work->work, qedf_fp_io_handler); 2601 2602 /* Copy contents of CQE for deferred processing */ 2603 memcpy(&io_work->cqe, cqe, sizeof(struct fcoe_cqe)); 2604 2605 io_work->qedf = qedf; 2606 io_work->fp = fp; 2607 2608 queue_work_on(smp_processor_id(), qedf_io_wq, &io_work->work); 2609 increment_prod: 2610 spin_lock_irqsave(&qedf->hba_lock, flags); 2611 2612 /* Increment producer to let f/w know we've handled the frame */ 2613 qedf->bdq_prod_idx++; 2614 2615 /* Producer index wraps at uint16_t boundary */ 2616 if (qedf->bdq_prod_idx == 0xffff) 2617 qedf->bdq_prod_idx = 0; 2618 2619 writew(qedf->bdq_prod_idx, qedf->bdq_primary_prod); 2620 readw(qedf->bdq_primary_prod); 2621 writew(qedf->bdq_prod_idx, qedf->bdq_secondary_prod); 2622 readw(qedf->bdq_secondary_prod); 2623 2624 spin_unlock_irqrestore(&qedf->hba_lock, flags); 2625 } 2626