nvme_qpair.c revision 252271
1/*- 2 * Copyright (C) 2012 Intel Corporation 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/dev/nvme/nvme_qpair.c 252271 2013-06-26 23:27:17Z jimharris $"); 29 30#include <sys/param.h> 31#include <sys/bus.h> 32 33#include <dev/pci/pcivar.h> 34 35#include "nvme_private.h" 36 37static void _nvme_qpair_submit_request(struct nvme_qpair *qpair, 38 struct nvme_request *req); 39 40struct nvme_opcode_string { 41 42 uint16_t opc; 43 const char * str; 44}; 45 46static struct nvme_opcode_string admin_opcode[] = { 47 { NVME_OPC_DELETE_IO_SQ, "DELETE IO SQ" }, 48 { NVME_OPC_CREATE_IO_SQ, "CREATE IO SQ" }, 49 { NVME_OPC_GET_LOG_PAGE, "GET LOG PAGE" }, 50 { NVME_OPC_DELETE_IO_CQ, "DELETE IO CQ" }, 51 { NVME_OPC_CREATE_IO_CQ, "CREATE IO CQ" }, 52 { NVME_OPC_IDENTIFY, "IDENTIFY" }, 53 { NVME_OPC_ABORT, "ABORT" }, 54 { NVME_OPC_SET_FEATURES, "SET FEATURES" }, 55 { NVME_OPC_GET_FEATURES, "GET FEATURES" }, 56 { NVME_OPC_ASYNC_EVENT_REQUEST, "ASYNC EVENT REQUEST" }, 57 { NVME_OPC_FIRMWARE_ACTIVATE, "FIRMWARE ACTIVATE" }, 58 { NVME_OPC_FIRMWARE_IMAGE_DOWNLOAD, "FIRMWARE IMAGE DOWNLOAD" }, 59 { NVME_OPC_FORMAT_NVM, "FORMAT NVM" }, 60 { NVME_OPC_SECURITY_SEND, "SECURITY SEND" }, 61 { NVME_OPC_SECURITY_RECEIVE, "SECURITY RECEIVE" }, 62 { 0xFFFF, "ADMIN COMMAND" } 63}; 64 65static struct nvme_opcode_string io_opcode[] = { 66 { NVME_OPC_FLUSH, "FLUSH" }, 67 { NVME_OPC_WRITE, "WRITE" }, 68 { NVME_OPC_READ, "READ" }, 69 { NVME_OPC_WRITE_UNCORRECTABLE, "WRITE UNCORRECTABLE" }, 70 { NVME_OPC_COMPARE, "COMPARE" }, 71 { NVME_OPC_DATASET_MANAGEMENT, "DATASET MANAGEMENT" }, 72 { 0xFFFF, "IO COMMAND" } 73}; 74 75static const char * 76get_admin_opcode_string(uint16_t opc) 77{ 78 struct nvme_opcode_string *entry; 79 80 entry = admin_opcode; 81 82 while (entry->opc != 0xFFFF) { 83 if (entry->opc == opc) 84 return (entry->str); 85 entry++; 86 } 87 return (entry->str); 88} 89 90static const char * 91get_io_opcode_string(uint16_t opc) 92{ 93 struct nvme_opcode_string *entry; 94 95 entry = io_opcode; 96 97 while (entry->opc != 0xFFFF) { 98 if (entry->opc == opc) 99 return (entry->str); 100 entry++; 101 } 102 return (entry->str); 103} 104 105 106static void 107nvme_admin_qpair_print_command(struct nvme_qpair *qpair, 108 struct nvme_command *cmd) 109{ 110 111 nvme_printf(qpair->ctrlr, "%s (%02x) sqid:%d cid:%d nsid:%x " 112 "cdw10:%08x cdw11:%08x\n", 113 get_admin_opcode_string(cmd->opc), cmd->opc, qpair->id, cmd->cid, 114 cmd->nsid, cmd->cdw10, cmd->cdw11); 115} 116 117static void 118nvme_io_qpair_print_command(struct nvme_qpair *qpair, 119 struct nvme_command *cmd) 120{ 121 122 switch (cmd->opc) { 123 case NVME_OPC_WRITE: 124 case NVME_OPC_READ: 125 case NVME_OPC_WRITE_UNCORRECTABLE: 126 case NVME_OPC_COMPARE: 127 nvme_printf(qpair->ctrlr, "%s sqid:%d cid:%d nsid:%d " 128 "lba:%llu len:%d\n", 129 get_io_opcode_string(cmd->opc), qpair->id, cmd->cid, 130 cmd->nsid, 131 ((unsigned long long)cmd->cdw11 << 32) + cmd->cdw10, 132 (cmd->cdw12 & 0xFFFF) + 1); 133 break; 134 case NVME_OPC_FLUSH: 135 case NVME_OPC_DATASET_MANAGEMENT: 136 nvme_printf(qpair->ctrlr, "%s sqid:%d cid:%d nsid:%d\n", 137 get_io_opcode_string(cmd->opc), qpair->id, cmd->cid, 138 cmd->nsid); 139 break; 140 default: 141 nvme_printf(qpair->ctrlr, "%s (%02x) sqid:%d cid:%d nsid:%d\n", 142 get_io_opcode_string(cmd->opc), cmd->opc, qpair->id, 143 cmd->cid, cmd->nsid); 144 break; 145 } 146} 147 148static void 149nvme_qpair_print_command(struct nvme_qpair *qpair, struct nvme_command *cmd) 150{ 151 if (qpair->id == 0) 152 nvme_admin_qpair_print_command(qpair, cmd); 153 else 154 nvme_io_qpair_print_command(qpair, cmd); 155} 156 157struct nvme_status_string { 158 159 uint16_t sc; 160 const char * str; 161}; 162 163static struct nvme_status_string generic_status[] = { 164 { NVME_SC_SUCCESS, "SUCCESS" }, 165 { NVME_SC_INVALID_OPCODE, "INVALID OPCODE" }, 166 { NVME_SC_INVALID_FIELD, "INVALID_FIELD" }, 167 { NVME_SC_COMMAND_ID_CONFLICT, "COMMAND ID CONFLICT" }, 168 { NVME_SC_DATA_TRANSFER_ERROR, "DATA TRANSFER ERROR" }, 169 { NVME_SC_ABORTED_POWER_LOSS, "ABORTED - POWER LOSS" }, 170 { NVME_SC_INTERNAL_DEVICE_ERROR, "INTERNAL DEVICE ERROR" }, 171 { NVME_SC_ABORTED_BY_REQUEST, "ABORTED - BY REQUEST" }, 172 { NVME_SC_ABORTED_SQ_DELETION, "ABORTED - SQ DELETION" }, 173 { NVME_SC_ABORTED_FAILED_FUSED, "ABORTED - FAILED FUSED" }, 174 { NVME_SC_ABORTED_MISSING_FUSED, "ABORTED - MISSING FUSED" }, 175 { NVME_SC_INVALID_NAMESPACE_OR_FORMAT, "INVALID NAMESPACE OR FORMAT" }, 176 { NVME_SC_COMMAND_SEQUENCE_ERROR, "COMMAND SEQUENCE ERROR" }, 177 { NVME_SC_LBA_OUT_OF_RANGE, "LBA OUT OF RANGE" }, 178 { NVME_SC_CAPACITY_EXCEEDED, "CAPACITY EXCEEDED" }, 179 { NVME_SC_NAMESPACE_NOT_READY, "NAMESPACE NOT READY" }, 180 { 0xFFFF, "GENERIC" } 181}; 182 183static struct nvme_status_string command_specific_status[] = { 184 { NVME_SC_COMPLETION_QUEUE_INVALID, "INVALID COMPLETION QUEUE" }, 185 { NVME_SC_INVALID_QUEUE_IDENTIFIER, "INVALID QUEUE IDENTIFIER" }, 186 { NVME_SC_MAXIMUM_QUEUE_SIZE_EXCEEDED, "MAX QUEUE SIZE EXCEEDED" }, 187 { NVME_SC_ABORT_COMMAND_LIMIT_EXCEEDED, "ABORT CMD LIMIT EXCEEDED" }, 188 { NVME_SC_ASYNC_EVENT_REQUEST_LIMIT_EXCEEDED, "ASYNC LIMIT EXCEEDED" }, 189 { NVME_SC_INVALID_FIRMWARE_SLOT, "INVALID FIRMWARE SLOT" }, 190 { NVME_SC_INVALID_FIRMWARE_IMAGE, "INVALID FIRMWARE IMAGE" }, 191 { NVME_SC_INVALID_INTERRUPT_VECTOR, "INVALID INTERRUPT VECTOR" }, 192 { NVME_SC_INVALID_LOG_PAGE, "INVALID LOG PAGE" }, 193 { NVME_SC_INVALID_FORMAT, "INVALID FORMAT" }, 194 { NVME_SC_FIRMWARE_REQUIRES_RESET, "FIRMWARE REQUIRES RESET" }, 195 { NVME_SC_CONFLICTING_ATTRIBUTES, "CONFLICTING ATTRIBUTES" }, 196 { NVME_SC_INVALID_PROTECTION_INFO, "INVALID PROTECTION INFO" }, 197 { NVME_SC_ATTEMPTED_WRITE_TO_RO_PAGE, "WRITE TO RO PAGE" }, 198 { 0xFFFF, "COMMAND SPECIFIC" } 199}; 200 201static struct nvme_status_string media_error_status[] = { 202 { NVME_SC_WRITE_FAULTS, "WRITE FAULTS" }, 203 { NVME_SC_UNRECOVERED_READ_ERROR, "UNRECOVERED READ ERROR" }, 204 { NVME_SC_GUARD_CHECK_ERROR, "GUARD CHECK ERROR" }, 205 { NVME_SC_APPLICATION_TAG_CHECK_ERROR, "APPLICATION TAG CHECK ERROR" }, 206 { NVME_SC_REFERENCE_TAG_CHECK_ERROR, "REFERENCE TAG CHECK ERROR" }, 207 { NVME_SC_COMPARE_FAILURE, "COMPARE FAILURE" }, 208 { NVME_SC_ACCESS_DENIED, "ACCESS DENIED" }, 209 { 0xFFFF, "MEDIA ERROR" } 210}; 211 212static const char * 213get_status_string(uint16_t sct, uint16_t sc) 214{ 215 struct nvme_status_string *entry; 216 217 switch (sct) { 218 case NVME_SCT_GENERIC: 219 entry = generic_status; 220 break; 221 case NVME_SCT_COMMAND_SPECIFIC: 222 entry = command_specific_status; 223 break; 224 case NVME_SCT_MEDIA_ERROR: 225 entry = media_error_status; 226 break; 227 case NVME_SCT_VENDOR_SPECIFIC: 228 return ("VENDOR SPECIFIC"); 229 default: 230 return ("RESERVED"); 231 } 232 233 while (entry->sc != 0xFFFF) { 234 if (entry->sc == sc) 235 return (entry->str); 236 entry++; 237 } 238 return (entry->str); 239} 240 241static void 242nvme_qpair_print_completion(struct nvme_qpair *qpair, 243 struct nvme_completion *cpl) 244{ 245 nvme_printf(qpair->ctrlr, "%s (%02x/%02x) sqid:%d cid:%d cdw0:%x\n", 246 get_status_string(cpl->status.sct, cpl->status.sc), 247 cpl->status.sct, cpl->status.sc, cpl->sqid, cpl->cid, cpl->cdw0); 248} 249 250static boolean_t 251nvme_completion_is_retry(const struct nvme_completion *cpl) 252{ 253 /* 254 * TODO: spec is not clear how commands that are aborted due 255 * to TLER will be marked. So for now, it seems 256 * NAMESPACE_NOT_READY is the only case where we should 257 * look at the DNR bit. 258 */ 259 switch (cpl->status.sct) { 260 case NVME_SCT_GENERIC: 261 switch (cpl->status.sc) { 262 case NVME_SC_ABORTED_BY_REQUEST: 263 case NVME_SC_NAMESPACE_NOT_READY: 264 if (cpl->status.dnr) 265 return (0); 266 else 267 return (1); 268 case NVME_SC_INVALID_OPCODE: 269 case NVME_SC_INVALID_FIELD: 270 case NVME_SC_COMMAND_ID_CONFLICT: 271 case NVME_SC_DATA_TRANSFER_ERROR: 272 case NVME_SC_ABORTED_POWER_LOSS: 273 case NVME_SC_INTERNAL_DEVICE_ERROR: 274 case NVME_SC_ABORTED_SQ_DELETION: 275 case NVME_SC_ABORTED_FAILED_FUSED: 276 case NVME_SC_ABORTED_MISSING_FUSED: 277 case NVME_SC_INVALID_NAMESPACE_OR_FORMAT: 278 case NVME_SC_COMMAND_SEQUENCE_ERROR: 279 case NVME_SC_LBA_OUT_OF_RANGE: 280 case NVME_SC_CAPACITY_EXCEEDED: 281 default: 282 return (0); 283 } 284 case NVME_SCT_COMMAND_SPECIFIC: 285 case NVME_SCT_MEDIA_ERROR: 286 case NVME_SCT_VENDOR_SPECIFIC: 287 default: 288 return (0); 289 } 290} 291 292static void 293nvme_qpair_construct_tracker(struct nvme_qpair *qpair, struct nvme_tracker *tr, 294 uint16_t cid) 295{ 296 297 bus_dmamap_create(qpair->dma_tag, 0, &tr->payload_dma_map); 298 bus_dmamap_create(qpair->dma_tag, 0, &tr->prp_dma_map); 299 300 bus_dmamap_load(qpair->dma_tag, tr->prp_dma_map, tr->prp, 301 sizeof(tr->prp), nvme_single_map, &tr->prp_bus_addr, 0); 302 303 callout_init(&tr->timer, 1); 304 tr->cid = cid; 305 tr->qpair = qpair; 306} 307 308static void 309nvme_qpair_complete_tracker(struct nvme_qpair *qpair, struct nvme_tracker *tr, 310 struct nvme_completion *cpl, boolean_t print_on_error) 311{ 312 struct nvme_request *req; 313 boolean_t retry, error; 314 315 req = tr->req; 316 error = nvme_completion_is_error(cpl); 317 retry = error && nvme_completion_is_retry(cpl) && 318 req->retries < nvme_retry_count; 319 320 if (error && print_on_error) { 321 nvme_qpair_print_command(qpair, &req->cmd); 322 nvme_qpair_print_completion(qpair, cpl); 323 } 324 325 qpair->act_tr[cpl->cid] = NULL; 326 327 KASSERT(cpl->cid == req->cmd.cid, ("cpl cid does not match cmd cid\n")); 328 329 if (req->cb_fn && !retry) 330 req->cb_fn(req->cb_arg, cpl); 331 332 mtx_lock(&qpair->lock); 333 callout_stop(&tr->timer); 334 335 if (retry) { 336 req->retries++; 337 nvme_qpair_submit_tracker(qpair, tr); 338 } else { 339 if (req->type != NVME_REQUEST_NULL) 340 bus_dmamap_unload(qpair->dma_tag, 341 tr->payload_dma_map); 342 343 nvme_free_request(req); 344 tr->req = NULL; 345 346 TAILQ_REMOVE(&qpair->outstanding_tr, tr, tailq); 347 TAILQ_INSERT_HEAD(&qpair->free_tr, tr, tailq); 348 349 /* 350 * If the controller is in the middle of resetting, don't 351 * try to submit queued requests here - let the reset logic 352 * handle that instead. 353 */ 354 if (!STAILQ_EMPTY(&qpair->queued_req) && 355 !qpair->ctrlr->is_resetting) { 356 req = STAILQ_FIRST(&qpair->queued_req); 357 STAILQ_REMOVE_HEAD(&qpair->queued_req, stailq); 358 _nvme_qpair_submit_request(qpair, req); 359 } 360 } 361 362 mtx_unlock(&qpair->lock); 363} 364 365static void 366nvme_qpair_manual_complete_tracker(struct nvme_qpair *qpair, 367 struct nvme_tracker *tr, uint32_t sct, uint32_t sc, uint32_t dnr, 368 boolean_t print_on_error) 369{ 370 struct nvme_completion cpl; 371 372 memset(&cpl, 0, sizeof(cpl)); 373 cpl.sqid = qpair->id; 374 cpl.cid = tr->cid; 375 cpl.status.sct = sct; 376 cpl.status.sc = sc; 377 cpl.status.dnr = dnr; 378 nvme_qpair_complete_tracker(qpair, tr, &cpl, print_on_error); 379} 380 381void 382nvme_qpair_manual_complete_request(struct nvme_qpair *qpair, 383 struct nvme_request *req, uint32_t sct, uint32_t sc, 384 boolean_t print_on_error) 385{ 386 struct nvme_completion cpl; 387 boolean_t error; 388 389 memset(&cpl, 0, sizeof(cpl)); 390 cpl.sqid = qpair->id; 391 cpl.status.sct = sct; 392 cpl.status.sc = sc; 393 394 error = nvme_completion_is_error(&cpl); 395 396 if (error && print_on_error) { 397 nvme_qpair_print_command(qpair, &req->cmd); 398 nvme_qpair_print_completion(qpair, &cpl); 399 } 400 401 if (req->cb_fn) 402 req->cb_fn(req->cb_arg, &cpl); 403 404 nvme_free_request(req); 405} 406 407void 408nvme_qpair_process_completions(struct nvme_qpair *qpair) 409{ 410 struct nvme_tracker *tr; 411 struct nvme_completion *cpl; 412 413 qpair->num_intr_handler_calls++; 414 415 if (!qpair->is_enabled) 416 /* 417 * qpair is not enabled, likely because a controller reset is 418 * is in progress. Ignore the interrupt - any I/O that was 419 * associated with this interrupt will get retried when the 420 * reset is complete. 421 */ 422 return; 423 424 while (1) { 425 cpl = &qpair->cpl[qpair->cq_head]; 426 427 if (cpl->status.p != qpair->phase) 428 break; 429 430 tr = qpair->act_tr[cpl->cid]; 431 432 if (tr != NULL) { 433 nvme_qpair_complete_tracker(qpair, tr, cpl, TRUE); 434 qpair->sq_head = cpl->sqhd; 435 } else { 436 nvme_printf(qpair->ctrlr, 437 "cpl does not map to outstanding cmd\n"); 438 nvme_dump_completion(cpl); 439 KASSERT(0, ("received completion for unknown cmd\n")); 440 } 441 442 if (++qpair->cq_head == qpair->num_entries) { 443 qpair->cq_head = 0; 444 qpair->phase = !qpair->phase; 445 } 446 447 nvme_mmio_write_4(qpair->ctrlr, doorbell[qpair->id].cq_hdbl, 448 qpair->cq_head); 449 } 450} 451 452static void 453nvme_qpair_msix_handler(void *arg) 454{ 455 struct nvme_qpair *qpair = arg; 456 457 nvme_qpair_process_completions(qpair); 458} 459 460void 461nvme_qpair_construct(struct nvme_qpair *qpair, uint32_t id, 462 uint16_t vector, uint32_t num_entries, uint32_t num_trackers, 463 struct nvme_controller *ctrlr) 464{ 465 struct nvme_tracker *tr; 466 uint32_t i; 467 468 qpair->id = id; 469 qpair->vector = vector; 470 qpair->num_entries = num_entries; 471#ifdef CHATHAM2 472 /* 473 * Chatham prototype board starts having issues at higher queue 474 * depths. So use a conservative estimate here of no more than 64 475 * outstanding I/O per queue at any one point. 476 */ 477 if (pci_get_devid(ctrlr->dev) == CHATHAM_PCI_ID) 478 num_trackers = min(num_trackers, 64); 479#endif 480 qpair->num_trackers = num_trackers; 481 qpair->ctrlr = ctrlr; 482 483 if (ctrlr->msix_enabled) { 484 485 /* 486 * MSI-X vector resource IDs start at 1, so we add one to 487 * the queue's vector to get the corresponding rid to use. 488 */ 489 qpair->rid = vector + 1; 490 491 qpair->res = bus_alloc_resource_any(ctrlr->dev, SYS_RES_IRQ, 492 &qpair->rid, RF_ACTIVE); 493 494 bus_setup_intr(ctrlr->dev, qpair->res, 495 INTR_TYPE_MISC | INTR_MPSAFE, NULL, 496 nvme_qpair_msix_handler, qpair, &qpair->tag); 497 } 498 499 mtx_init(&qpair->lock, "nvme qpair lock", NULL, MTX_DEF); 500 501 bus_dma_tag_create(bus_get_dma_tag(ctrlr->dev), 502 sizeof(uint64_t), PAGE_SIZE, BUS_SPACE_MAXADDR, 503 BUS_SPACE_MAXADDR, NULL, NULL, NVME_MAX_XFER_SIZE, 504 (NVME_MAX_XFER_SIZE/PAGE_SIZE)+1, PAGE_SIZE, 0, 505 NULL, NULL, &qpair->dma_tag); 506 507 qpair->num_cmds = 0; 508 qpair->num_intr_handler_calls = 0; 509 510 qpair->cmd = contigmalloc(qpair->num_entries * 511 sizeof(struct nvme_command), M_NVME, M_ZERO, 512 0, BUS_SPACE_MAXADDR, PAGE_SIZE, 0); 513 qpair->cpl = contigmalloc(qpair->num_entries * 514 sizeof(struct nvme_completion), M_NVME, M_ZERO, 515 0, BUS_SPACE_MAXADDR, PAGE_SIZE, 0); 516 517 bus_dmamap_create(qpair->dma_tag, 0, &qpair->cmd_dma_map); 518 bus_dmamap_create(qpair->dma_tag, 0, &qpair->cpl_dma_map); 519 520 bus_dmamap_load(qpair->dma_tag, qpair->cmd_dma_map, 521 qpair->cmd, qpair->num_entries * sizeof(struct nvme_command), 522 nvme_single_map, &qpair->cmd_bus_addr, 0); 523 bus_dmamap_load(qpair->dma_tag, qpair->cpl_dma_map, 524 qpair->cpl, qpair->num_entries * sizeof(struct nvme_completion), 525 nvme_single_map, &qpair->cpl_bus_addr, 0); 526 527 qpair->sq_tdbl_off = nvme_mmio_offsetof(doorbell[id].sq_tdbl); 528 qpair->cq_hdbl_off = nvme_mmio_offsetof(doorbell[id].cq_hdbl); 529 530 TAILQ_INIT(&qpair->free_tr); 531 TAILQ_INIT(&qpair->outstanding_tr); 532 STAILQ_INIT(&qpair->queued_req); 533 534 for (i = 0; i < qpair->num_trackers; i++) { 535 tr = malloc(sizeof(*tr), M_NVME, M_ZERO | M_WAITOK); 536 nvme_qpair_construct_tracker(qpair, tr, i); 537 TAILQ_INSERT_HEAD(&qpair->free_tr, tr, tailq); 538 } 539 540 qpair->act_tr = malloc(sizeof(struct nvme_tracker *) * qpair->num_entries, 541 M_NVME, M_ZERO | M_WAITOK); 542} 543 544static void 545nvme_qpair_destroy(struct nvme_qpair *qpair) 546{ 547 struct nvme_tracker *tr; 548 549 if (qpair->tag) 550 bus_teardown_intr(qpair->ctrlr->dev, qpair->res, qpair->tag); 551 552 if (qpair->res) 553 bus_release_resource(qpair->ctrlr->dev, SYS_RES_IRQ, 554 rman_get_rid(qpair->res), qpair->res); 555 556 if (qpair->cmd) { 557 bus_dmamap_unload(qpair->dma_tag, qpair->cmd_dma_map); 558 bus_dmamap_destroy(qpair->dma_tag, qpair->cmd_dma_map); 559 contigfree(qpair->cmd, 560 qpair->num_entries * sizeof(struct nvme_command), M_NVME); 561 } 562 563 if (qpair->cpl) { 564 bus_dmamap_unload(qpair->dma_tag, qpair->cpl_dma_map); 565 bus_dmamap_destroy(qpair->dma_tag, qpair->cpl_dma_map); 566 contigfree(qpair->cpl, 567 qpair->num_entries * sizeof(struct nvme_completion), 568 M_NVME); 569 } 570 571 if (qpair->dma_tag) 572 bus_dma_tag_destroy(qpair->dma_tag); 573 574 if (qpair->act_tr) 575 free(qpair->act_tr, M_NVME); 576 577 while (!TAILQ_EMPTY(&qpair->free_tr)) { 578 tr = TAILQ_FIRST(&qpair->free_tr); 579 TAILQ_REMOVE(&qpair->free_tr, tr, tailq); 580 bus_dmamap_destroy(qpair->dma_tag, tr->payload_dma_map); 581 bus_dmamap_destroy(qpair->dma_tag, tr->prp_dma_map); 582 free(tr, M_NVME); 583 } 584} 585 586static void 587nvme_admin_qpair_abort_aers(struct nvme_qpair *qpair) 588{ 589 struct nvme_tracker *tr; 590 591 tr = TAILQ_FIRST(&qpair->outstanding_tr); 592 while (tr != NULL) { 593 if (tr->req->cmd.opc == NVME_OPC_ASYNC_EVENT_REQUEST) { 594 nvme_qpair_manual_complete_tracker(qpair, tr, 595 NVME_SCT_GENERIC, NVME_SC_ABORTED_SQ_DELETION, 0, 596 FALSE); 597 tr = TAILQ_FIRST(&qpair->outstanding_tr); 598 } else { 599 tr = TAILQ_NEXT(tr, tailq); 600 } 601 } 602} 603 604void 605nvme_admin_qpair_destroy(struct nvme_qpair *qpair) 606{ 607 608 nvme_admin_qpair_abort_aers(qpair); 609 nvme_qpair_destroy(qpair); 610} 611 612void 613nvme_io_qpair_destroy(struct nvme_qpair *qpair) 614{ 615 616 nvme_qpair_destroy(qpair); 617} 618 619static void 620nvme_abort_complete(void *arg, const struct nvme_completion *status) 621{ 622 struct nvme_tracker *tr = arg; 623 624 /* 625 * If cdw0 == 1, the controller was not able to abort the command 626 * we requested. We still need to check the active tracker array, 627 * to cover race where I/O timed out at same time controller was 628 * completing the I/O. 629 */ 630 if (status->cdw0 == 1 && tr->qpair->act_tr[tr->cid] != NULL) { 631 /* 632 * An I/O has timed out, and the controller was unable to 633 * abort it for some reason. Construct a fake completion 634 * status, and then complete the I/O's tracker manually. 635 */ 636 nvme_printf(tr->qpair->ctrlr, 637 "abort command failed, aborting command manually\n"); 638 nvme_qpair_manual_complete_tracker(tr->qpair, tr, 639 NVME_SCT_GENERIC, NVME_SC_ABORTED_BY_REQUEST, 0, TRUE); 640 } 641} 642 643static void 644nvme_timeout(void *arg) 645{ 646 struct nvme_tracker *tr = arg; 647 struct nvme_qpair *qpair = tr->qpair; 648 struct nvme_controller *ctrlr = qpair->ctrlr; 649 union csts_register csts; 650 651 /* Read csts to get value of cfs - controller fatal status. */ 652 csts.raw = nvme_mmio_read_4(ctrlr, csts); 653 654 if (ctrlr->enable_aborts && csts.bits.cfs == 0) { 655 /* 656 * If aborts are enabled, only use them if the controller is 657 * not reporting fatal status. 658 */ 659 nvme_ctrlr_cmd_abort(ctrlr, tr->cid, qpair->id, 660 nvme_abort_complete, tr); 661 } else 662 nvme_ctrlr_reset(ctrlr); 663} 664 665void 666nvme_qpair_submit_tracker(struct nvme_qpair *qpair, struct nvme_tracker *tr) 667{ 668 struct nvme_request *req; 669 struct nvme_controller *ctrlr; 670 671 mtx_assert(&qpair->lock, MA_OWNED); 672 673 req = tr->req; 674 req->cmd.cid = tr->cid; 675 qpair->act_tr[tr->cid] = tr; 676 ctrlr = qpair->ctrlr; 677 678 if (req->timeout) 679#if __FreeBSD_version >= 800030 680 callout_reset_curcpu(&tr->timer, ctrlr->timeout_period * hz, 681 nvme_timeout, tr); 682#else 683 callout_reset(&tr->timer, ctrlr->timeout_period * hz, 684 nvme_timeout, tr); 685#endif 686 687 /* Copy the command from the tracker to the submission queue. */ 688 memcpy(&qpair->cmd[qpair->sq_tail], &req->cmd, sizeof(req->cmd)); 689 690 if (++qpair->sq_tail == qpair->num_entries) 691 qpair->sq_tail = 0; 692 693 wmb(); 694 nvme_mmio_write_4(qpair->ctrlr, doorbell[qpair->id].sq_tdbl, 695 qpair->sq_tail); 696 697 qpair->num_cmds++; 698} 699 700static void 701nvme_payload_map(void *arg, bus_dma_segment_t *seg, int nseg, int error) 702{ 703 struct nvme_tracker *tr = arg; 704 uint32_t cur_nseg; 705 706 /* 707 * If the mapping operation failed, return immediately. The caller 708 * is responsible for detecting the error status and failing the 709 * tracker manually. 710 */ 711 if (error != 0) 712 return; 713 714 /* 715 * Note that we specified PAGE_SIZE for alignment and max 716 * segment size when creating the bus dma tags. So here 717 * we can safely just transfer each segment to its 718 * associated PRP entry. 719 */ 720 tr->req->cmd.prp1 = seg[0].ds_addr; 721 722 if (nseg == 2) { 723 tr->req->cmd.prp2 = seg[1].ds_addr; 724 } else if (nseg > 2) { 725 cur_nseg = 1; 726 tr->req->cmd.prp2 = (uint64_t)tr->prp_bus_addr; 727 while (cur_nseg < nseg) { 728 tr->prp[cur_nseg-1] = 729 (uint64_t)seg[cur_nseg].ds_addr; 730 cur_nseg++; 731 } 732 } 733 734 nvme_qpair_submit_tracker(tr->qpair, tr); 735} 736 737static void 738nvme_payload_map_uio(void *arg, bus_dma_segment_t *seg, int nseg, 739 bus_size_t mapsize, int error) 740{ 741 742 nvme_payload_map(arg, seg, nseg, error); 743} 744 745static void 746_nvme_qpair_submit_request(struct nvme_qpair *qpair, struct nvme_request *req) 747{ 748 struct nvme_tracker *tr; 749 int err = 0; 750 751 mtx_assert(&qpair->lock, MA_OWNED); 752 753 tr = TAILQ_FIRST(&qpair->free_tr); 754 req->qpair = qpair; 755 756 if (tr == NULL || !qpair->is_enabled) { 757 /* 758 * No tracker is available, or the qpair is disabled due to 759 * an in-progress controller-level reset or controller 760 * failure. 761 */ 762 763 if (qpair->ctrlr->is_failed) { 764 /* 765 * The controller has failed. Post the request to a 766 * task where it will be aborted, so that we do not 767 * invoke the request's callback in the context 768 * of the submission. 769 */ 770 nvme_ctrlr_post_failed_request(qpair->ctrlr, req); 771 } else { 772 /* 773 * Put the request on the qpair's request queue to be 774 * processed when a tracker frees up via a command 775 * completion or when the controller reset is 776 * completed. 777 */ 778 STAILQ_INSERT_TAIL(&qpair->queued_req, req, stailq); 779 } 780 return; 781 } 782 783 TAILQ_REMOVE(&qpair->free_tr, tr, tailq); 784 TAILQ_INSERT_TAIL(&qpair->outstanding_tr, tr, tailq); 785 tr->req = req; 786 787 switch (req->type) { 788 case NVME_REQUEST_VADDR: 789 err = bus_dmamap_load(tr->qpair->dma_tag, tr->payload_dma_map, 790 req->u.payload, req->payload_size, nvme_payload_map, tr, 0); 791 if (err != 0) 792 nvme_printf(qpair->ctrlr, 793 "bus_dmamap_load returned 0x%x!\n", err); 794 break; 795 case NVME_REQUEST_NULL: 796 nvme_qpair_submit_tracker(tr->qpair, tr); 797 break; 798 case NVME_REQUEST_UIO: 799 err = bus_dmamap_load_uio(tr->qpair->dma_tag, 800 tr->payload_dma_map, req->u.uio, nvme_payload_map_uio, 801 tr, 0); 802 if (err != 0) 803 nvme_printf(qpair->ctrlr, 804 "bus_dmamap_load_uio returned 0x%x!\n", err); 805 break; 806#ifdef NVME_UNMAPPED_BIO_SUPPORT 807 case NVME_REQUEST_BIO: 808 err = bus_dmamap_load_bio(tr->qpair->dma_tag, 809 tr->payload_dma_map, req->u.bio, nvme_payload_map, tr, 0); 810 if (err != 0) 811 nvme_printf(qpair->ctrlr, 812 "bus_dmamap_load_bio returned 0x%x!\n", err); 813 break; 814#endif 815 default: 816 panic("unknown nvme request type 0x%x\n", req->type); 817 break; 818 } 819 820 if (err != 0) { 821 /* 822 * The dmamap operation failed, so we manually fail the 823 * tracker here with DATA_TRANSFER_ERROR status. 824 * 825 * nvme_qpair_manual_complete_tracker must not be called 826 * with the qpair lock held. 827 */ 828 mtx_unlock(&qpair->lock); 829 nvme_qpair_manual_complete_tracker(qpair, tr, NVME_SCT_GENERIC, 830 NVME_SC_DATA_TRANSFER_ERROR, 1 /* do not retry */, TRUE); 831 mtx_lock(&qpair->lock); 832 } 833} 834 835void 836nvme_qpair_submit_request(struct nvme_qpair *qpair, struct nvme_request *req) 837{ 838 839 mtx_lock(&qpair->lock); 840 _nvme_qpair_submit_request(qpair, req); 841 mtx_unlock(&qpair->lock); 842} 843 844static void 845nvme_qpair_enable(struct nvme_qpair *qpair) 846{ 847 848 qpair->is_enabled = TRUE; 849} 850 851void 852nvme_qpair_reset(struct nvme_qpair *qpair) 853{ 854 855 qpair->sq_head = qpair->sq_tail = qpair->cq_head = 0; 856 857 /* 858 * First time through the completion queue, HW will set phase 859 * bit on completions to 1. So set this to 1 here, indicating 860 * we're looking for a 1 to know which entries have completed. 861 * we'll toggle the bit each time when the completion queue 862 * rolls over. 863 */ 864 qpair->phase = 1; 865 866 memset(qpair->cmd, 0, 867 qpair->num_entries * sizeof(struct nvme_command)); 868 memset(qpair->cpl, 0, 869 qpair->num_entries * sizeof(struct nvme_completion)); 870} 871 872void 873nvme_admin_qpair_enable(struct nvme_qpair *qpair) 874{ 875 struct nvme_tracker *tr; 876 struct nvme_tracker *tr_temp; 877 878 /* 879 * Manually abort each outstanding admin command. Do not retry 880 * admin commands found here, since they will be left over from 881 * a controller reset and its likely the context in which the 882 * command was issued no longer applies. 883 */ 884 TAILQ_FOREACH_SAFE(tr, &qpair->outstanding_tr, tailq, tr_temp) { 885 nvme_printf(qpair->ctrlr, 886 "aborting outstanding admin command\n"); 887 nvme_qpair_manual_complete_tracker(qpair, tr, NVME_SCT_GENERIC, 888 NVME_SC_ABORTED_BY_REQUEST, 1 /* do not retry */, TRUE); 889 } 890 891 nvme_qpair_enable(qpair); 892} 893 894void 895nvme_io_qpair_enable(struct nvme_qpair *qpair) 896{ 897 STAILQ_HEAD(, nvme_request) temp; 898 struct nvme_tracker *tr; 899 struct nvme_tracker *tr_temp; 900 struct nvme_request *req; 901 902 /* 903 * Manually abort each outstanding I/O. This normally results in a 904 * retry, unless the retry count on the associated request has 905 * reached its limit. 906 */ 907 TAILQ_FOREACH_SAFE(tr, &qpair->outstanding_tr, tailq, tr_temp) { 908 nvme_printf(qpair->ctrlr, "aborting outstanding i/o\n"); 909 nvme_qpair_manual_complete_tracker(qpair, tr, NVME_SCT_GENERIC, 910 NVME_SC_ABORTED_BY_REQUEST, 0, TRUE); 911 } 912 913 mtx_lock(&qpair->lock); 914 915 nvme_qpair_enable(qpair); 916 917 STAILQ_INIT(&temp); 918 STAILQ_SWAP(&qpair->queued_req, &temp, nvme_request); 919 920 while (!STAILQ_EMPTY(&temp)) { 921 req = STAILQ_FIRST(&temp); 922 STAILQ_REMOVE_HEAD(&temp, stailq); 923 nvme_printf(qpair->ctrlr, "resubmitting queued i/o\n"); 924 nvme_qpair_print_command(qpair, &req->cmd); 925 _nvme_qpair_submit_request(qpair, req); 926 } 927 928 mtx_unlock(&qpair->lock); 929} 930 931static void 932nvme_qpair_disable(struct nvme_qpair *qpair) 933{ 934 struct nvme_tracker *tr; 935 936 qpair->is_enabled = FALSE; 937 mtx_lock(&qpair->lock); 938 TAILQ_FOREACH(tr, &qpair->outstanding_tr, tailq) 939 callout_stop(&tr->timer); 940 mtx_unlock(&qpair->lock); 941} 942 943void 944nvme_admin_qpair_disable(struct nvme_qpair *qpair) 945{ 946 947 nvme_qpair_disable(qpair); 948 nvme_admin_qpair_abort_aers(qpair); 949} 950 951void 952nvme_io_qpair_disable(struct nvme_qpair *qpair) 953{ 954 955 nvme_qpair_disable(qpair); 956} 957 958void 959nvme_qpair_fail(struct nvme_qpair *qpair) 960{ 961 struct nvme_tracker *tr; 962 struct nvme_request *req; 963 964 mtx_lock(&qpair->lock); 965 966 while (!STAILQ_EMPTY(&qpair->queued_req)) { 967 req = STAILQ_FIRST(&qpair->queued_req); 968 STAILQ_REMOVE_HEAD(&qpair->queued_req, stailq); 969 nvme_printf(qpair->ctrlr, "failing queued i/o\n"); 970 mtx_unlock(&qpair->lock); 971 nvme_qpair_manual_complete_request(qpair, req, NVME_SCT_GENERIC, 972 NVME_SC_ABORTED_BY_REQUEST, TRUE); 973 mtx_lock(&qpair->lock); 974 } 975 976 /* Manually abort each outstanding I/O. */ 977 while (!TAILQ_EMPTY(&qpair->outstanding_tr)) { 978 tr = TAILQ_FIRST(&qpair->outstanding_tr); 979 /* 980 * Do not remove the tracker. The abort_tracker path will 981 * do that for us. 982 */ 983 nvme_printf(qpair->ctrlr, "failing outstanding i/o\n"); 984 mtx_unlock(&qpair->lock); 985 nvme_qpair_manual_complete_tracker(qpair, tr, NVME_SCT_GENERIC, 986 NVME_SC_ABORTED_BY_REQUEST, 1 /* do not retry */, TRUE); 987 mtx_lock(&qpair->lock); 988 } 989 990 mtx_unlock(&qpair->lock); 991} 992 993