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