1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (c) 2011-2014, Intel Corporation. 4 */ 5 6 #ifndef _NVME_H 7 #define _NVME_H 8 9 #include <linux/nvme.h> 10 #include <linux/cdev.h> 11 #include <linux/pci.h> 12 #include <linux/kref.h> 13 #include <linux/blk-mq.h> 14 #include <linux/sed-opal.h> 15 #include <linux/fault-inject.h> 16 #include <linux/rcupdate.h> 17 #include <linux/wait.h> 18 #include <linux/t10-pi.h> 19 20 #include <trace/events/block.h> 21 22 extern unsigned int nvme_io_timeout; 23 #define NVME_IO_TIMEOUT (nvme_io_timeout * HZ) 24 25 extern unsigned int admin_timeout; 26 #define NVME_ADMIN_TIMEOUT (admin_timeout * HZ) 27 28 #define NVME_DEFAULT_KATO 5 29 30 #ifdef CONFIG_ARCH_NO_SG_CHAIN 31 #define NVME_INLINE_SG_CNT 0 32 #define NVME_INLINE_METADATA_SG_CNT 0 33 #else 34 #define NVME_INLINE_SG_CNT 2 35 #define NVME_INLINE_METADATA_SG_CNT 1 36 #endif 37 38 /* 39 * Default to a 4K page size, with the intention to update this 40 * path in the future to accommodate architectures with differing 41 * kernel and IO page sizes. 42 */ 43 #define NVME_CTRL_PAGE_SHIFT 12 44 #define NVME_CTRL_PAGE_SIZE (1 << NVME_CTRL_PAGE_SHIFT) 45 46 extern struct workqueue_struct *nvme_wq; 47 extern struct workqueue_struct *nvme_reset_wq; 48 extern struct workqueue_struct *nvme_delete_wq; 49 50 /* 51 * List of workarounds for devices that required behavior not specified in 52 * the standard. 53 */ 54 enum nvme_quirks { 55 /* 56 * Prefers I/O aligned to a stripe size specified in a vendor 57 * specific Identify field. 58 */ 59 NVME_QUIRK_STRIPE_SIZE = (1 << 0), 60 61 /* 62 * The controller doesn't handle Identify value others than 0 or 1 63 * correctly. 64 */ 65 NVME_QUIRK_IDENTIFY_CNS = (1 << 1), 66 67 /* 68 * The controller deterministically returns O's on reads to 69 * logical blocks that deallocate was called on. 70 */ 71 NVME_QUIRK_DEALLOCATE_ZEROES = (1 << 2), 72 73 /* 74 * The controller needs a delay before starts checking the device 75 * readiness, which is done by reading the NVME_CSTS_RDY bit. 76 */ 77 NVME_QUIRK_DELAY_BEFORE_CHK_RDY = (1 << 3), 78 79 /* 80 * APST should not be used. 81 */ 82 NVME_QUIRK_NO_APST = (1 << 4), 83 84 /* 85 * The deepest sleep state should not be used. 86 */ 87 NVME_QUIRK_NO_DEEPEST_PS = (1 << 5), 88 89 /* 90 * Set MEDIUM priority on SQ creation 91 */ 92 NVME_QUIRK_MEDIUM_PRIO_SQ = (1 << 7), 93 94 /* 95 * Ignore device provided subnqn. 96 */ 97 NVME_QUIRK_IGNORE_DEV_SUBNQN = (1 << 8), 98 99 /* 100 * Broken Write Zeroes. 101 */ 102 NVME_QUIRK_DISABLE_WRITE_ZEROES = (1 << 9), 103 104 /* 105 * Force simple suspend/resume path. 106 */ 107 NVME_QUIRK_SIMPLE_SUSPEND = (1 << 10), 108 109 /* 110 * Use only one interrupt vector for all queues 111 */ 112 NVME_QUIRK_SINGLE_VECTOR = (1 << 11), 113 114 /* 115 * Use non-standard 128 bytes SQEs. 116 */ 117 NVME_QUIRK_128_BYTES_SQES = (1 << 12), 118 119 /* 120 * Prevent tag overlap between queues 121 */ 122 NVME_QUIRK_SHARED_TAGS = (1 << 13), 123 124 /* 125 * Don't change the value of the temperature threshold feature 126 */ 127 NVME_QUIRK_NO_TEMP_THRESH_CHANGE = (1 << 14), 128 129 /* 130 * The controller doesn't handle the Identify Namespace 131 * Identification Descriptor list subcommand despite claiming 132 * NVMe 1.3 compliance. 133 */ 134 NVME_QUIRK_NO_NS_DESC_LIST = (1 << 15), 135 136 /* 137 * The controller does not properly handle DMA addresses over 138 * 48 bits. 139 */ 140 NVME_QUIRK_DMA_ADDRESS_BITS_48 = (1 << 16), 141 142 /* 143 * The controller requires the command_id value be limited, so skip 144 * encoding the generation sequence number. 145 */ 146 NVME_QUIRK_SKIP_CID_GEN = (1 << 17), 147 148 /* 149 * Reports garbage in the namespace identifiers (eui64, nguid, uuid). 150 */ 151 NVME_QUIRK_BOGUS_NID = (1 << 18), 152 }; 153 154 /* 155 * Common request structure for NVMe passthrough. All drivers must have 156 * this structure as the first member of their request-private data. 157 */ 158 struct nvme_request { 159 struct nvme_command *cmd; 160 union nvme_result result; 161 u8 genctr; 162 u8 retries; 163 u8 flags; 164 u16 status; 165 #ifdef CONFIG_NVME_MULTIPATH 166 unsigned long start_time; 167 #endif 168 struct nvme_ctrl *ctrl; 169 }; 170 171 /* 172 * Mark a bio as coming in through the mpath node. 173 */ 174 #define REQ_NVME_MPATH REQ_DRV 175 176 enum { 177 NVME_REQ_CANCELLED = (1 << 0), 178 NVME_REQ_USERCMD = (1 << 1), 179 NVME_MPATH_IO_STATS = (1 << 2), 180 }; 181 182 static inline struct nvme_request *nvme_req(struct request *req) 183 { 184 return blk_mq_rq_to_pdu(req); 185 } 186 187 static inline u16 nvme_req_qid(struct request *req) 188 { 189 if (!req->q->queuedata) 190 return 0; 191 192 return req->mq_hctx->queue_num + 1; 193 } 194 195 /* The below value is the specific amount of delay needed before checking 196 * readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the 197 * NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was 198 * found empirically. 199 */ 200 #define NVME_QUIRK_DELAY_AMOUNT 2300 201 202 /* 203 * enum nvme_ctrl_state: Controller state 204 * 205 * @NVME_CTRL_NEW: New controller just allocated, initial state 206 * @NVME_CTRL_LIVE: Controller is connected and I/O capable 207 * @NVME_CTRL_RESETTING: Controller is resetting (or scheduled reset) 208 * @NVME_CTRL_CONNECTING: Controller is disconnected, now connecting the 209 * transport 210 * @NVME_CTRL_DELETING: Controller is deleting (or scheduled deletion) 211 * @NVME_CTRL_DELETING_NOIO: Controller is deleting and I/O is not 212 * disabled/failed immediately. This state comes 213 * after all async event processing took place and 214 * before ns removal and the controller deletion 215 * progress 216 * @NVME_CTRL_DEAD: Controller is non-present/unresponsive during 217 * shutdown or removal. In this case we forcibly 218 * kill all inflight I/O as they have no chance to 219 * complete 220 */ 221 enum nvme_ctrl_state { 222 NVME_CTRL_NEW, 223 NVME_CTRL_LIVE, 224 NVME_CTRL_RESETTING, 225 NVME_CTRL_CONNECTING, 226 NVME_CTRL_DELETING, 227 NVME_CTRL_DELETING_NOIO, 228 NVME_CTRL_DEAD, 229 }; 230 231 struct nvme_fault_inject { 232 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS 233 struct fault_attr attr; 234 struct dentry *parent; 235 bool dont_retry; /* DNR, do not retry */ 236 u16 status; /* status code */ 237 #endif 238 }; 239 240 enum nvme_ctrl_flags { 241 NVME_CTRL_FAILFAST_EXPIRED = 0, 242 NVME_CTRL_ADMIN_Q_STOPPED = 1, 243 NVME_CTRL_STARTED_ONCE = 2, 244 NVME_CTRL_STOPPED = 3, 245 }; 246 247 struct nvme_ctrl { 248 bool comp_seen; 249 enum nvme_ctrl_state state; 250 bool identified; 251 spinlock_t lock; 252 struct mutex scan_lock; 253 const struct nvme_ctrl_ops *ops; 254 struct request_queue *admin_q; 255 struct request_queue *connect_q; 256 struct request_queue *fabrics_q; 257 struct device *dev; 258 int instance; 259 int numa_node; 260 struct blk_mq_tag_set *tagset; 261 struct blk_mq_tag_set *admin_tagset; 262 struct list_head namespaces; 263 struct rw_semaphore namespaces_rwsem; 264 struct device ctrl_device; 265 struct device *device; /* char device */ 266 #ifdef CONFIG_NVME_HWMON 267 struct device *hwmon_device; 268 #endif 269 struct cdev cdev; 270 struct work_struct reset_work; 271 struct work_struct delete_work; 272 wait_queue_head_t state_wq; 273 274 struct nvme_subsystem *subsys; 275 struct list_head subsys_entry; 276 277 struct opal_dev *opal_dev; 278 279 char name[12]; 280 u16 cntlid; 281 282 u32 ctrl_config; 283 u16 mtfa; 284 u32 queue_count; 285 286 u64 cap; 287 u32 max_hw_sectors; 288 u32 max_segments; 289 u32 max_integrity_segments; 290 u32 max_discard_sectors; 291 u32 max_discard_segments; 292 u32 max_zeroes_sectors; 293 #ifdef CONFIG_BLK_DEV_ZONED 294 u32 max_zone_append; 295 #endif 296 u16 crdt[3]; 297 u16 oncs; 298 u32 dmrsl; 299 u16 oacs; 300 u16 sqsize; 301 u32 max_namespaces; 302 atomic_t abort_limit; 303 u8 vwc; 304 u32 vs; 305 u32 sgls; 306 u16 kas; 307 u8 npss; 308 u8 apsta; 309 u16 wctemp; 310 u16 cctemp; 311 u32 oaes; 312 u32 aen_result; 313 u32 ctratt; 314 unsigned int shutdown_timeout; 315 unsigned int kato; 316 bool subsystem; 317 unsigned long quirks; 318 struct nvme_id_power_state psd[32]; 319 struct nvme_effects_log *effects; 320 struct xarray cels; 321 struct work_struct scan_work; 322 struct work_struct async_event_work; 323 struct delayed_work ka_work; 324 struct delayed_work failfast_work; 325 struct nvme_command ka_cmd; 326 struct work_struct fw_act_work; 327 unsigned long events; 328 329 #ifdef CONFIG_NVME_MULTIPATH 330 /* asymmetric namespace access: */ 331 u8 anacap; 332 u8 anatt; 333 u32 anagrpmax; 334 u32 nanagrpid; 335 struct mutex ana_lock; 336 struct nvme_ana_rsp_hdr *ana_log_buf; 337 size_t ana_log_size; 338 struct timer_list anatt_timer; 339 struct work_struct ana_work; 340 #endif 341 342 #ifdef CONFIG_NVME_AUTH 343 struct work_struct dhchap_auth_work; 344 struct mutex dhchap_auth_mutex; 345 struct nvme_dhchap_queue_context *dhchap_ctxs; 346 struct nvme_dhchap_key *host_key; 347 struct nvme_dhchap_key *ctrl_key; 348 u16 transaction; 349 #endif 350 351 /* Power saving configuration */ 352 u64 ps_max_latency_us; 353 bool apst_enabled; 354 355 /* PCIe only: */ 356 u32 hmpre; 357 u32 hmmin; 358 u32 hmminds; 359 u16 hmmaxd; 360 361 /* Fabrics only */ 362 u32 ioccsz; 363 u32 iorcsz; 364 u16 icdoff; 365 u16 maxcmd; 366 int nr_reconnects; 367 unsigned long flags; 368 struct nvmf_ctrl_options *opts; 369 370 struct page *discard_page; 371 unsigned long discard_page_busy; 372 373 struct nvme_fault_inject fault_inject; 374 375 enum nvme_ctrl_type cntrltype; 376 enum nvme_dctype dctype; 377 }; 378 379 enum nvme_iopolicy { 380 NVME_IOPOLICY_NUMA, 381 NVME_IOPOLICY_RR, 382 }; 383 384 struct nvme_subsystem { 385 int instance; 386 struct device dev; 387 /* 388 * Because we unregister the device on the last put we need 389 * a separate refcount. 390 */ 391 struct kref ref; 392 struct list_head entry; 393 struct mutex lock; 394 struct list_head ctrls; 395 struct list_head nsheads; 396 char subnqn[NVMF_NQN_SIZE]; 397 char serial[20]; 398 char model[40]; 399 char firmware_rev[8]; 400 u8 cmic; 401 enum nvme_subsys_type subtype; 402 u16 vendor_id; 403 u16 awupf; /* 0's based awupf value. */ 404 struct ida ns_ida; 405 #ifdef CONFIG_NVME_MULTIPATH 406 enum nvme_iopolicy iopolicy; 407 #endif 408 }; 409 410 /* 411 * Container structure for uniqueue namespace identifiers. 412 */ 413 struct nvme_ns_ids { 414 u8 eui64[8]; 415 u8 nguid[16]; 416 uuid_t uuid; 417 u8 csi; 418 }; 419 420 /* 421 * Anchor structure for namespaces. There is one for each namespace in a 422 * NVMe subsystem that any of our controllers can see, and the namespace 423 * structure for each controller is chained of it. For private namespaces 424 * there is a 1:1 relation to our namespace structures, that is ->list 425 * only ever has a single entry for private namespaces. 426 */ 427 struct nvme_ns_head { 428 struct list_head list; 429 struct srcu_struct srcu; 430 struct nvme_subsystem *subsys; 431 unsigned ns_id; 432 struct nvme_ns_ids ids; 433 struct list_head entry; 434 struct kref ref; 435 bool shared; 436 int instance; 437 struct nvme_effects_log *effects; 438 439 struct cdev cdev; 440 struct device cdev_device; 441 442 struct gendisk *disk; 443 #ifdef CONFIG_NVME_MULTIPATH 444 struct bio_list requeue_list; 445 spinlock_t requeue_lock; 446 struct work_struct requeue_work; 447 struct mutex lock; 448 unsigned long flags; 449 #define NVME_NSHEAD_DISK_LIVE 0 450 struct nvme_ns __rcu *current_path[]; 451 #endif 452 }; 453 454 static inline bool nvme_ns_head_multipath(struct nvme_ns_head *head) 455 { 456 return IS_ENABLED(CONFIG_NVME_MULTIPATH) && head->disk; 457 } 458 459 enum nvme_ns_features { 460 NVME_NS_EXT_LBAS = 1 << 0, /* support extended LBA format */ 461 NVME_NS_METADATA_SUPPORTED = 1 << 1, /* support getting generated md */ 462 NVME_NS_DEAC, /* DEAC bit in Write Zeores supported */ 463 }; 464 465 struct nvme_ns { 466 struct list_head list; 467 468 struct nvme_ctrl *ctrl; 469 struct request_queue *queue; 470 struct gendisk *disk; 471 #ifdef CONFIG_NVME_MULTIPATH 472 enum nvme_ana_state ana_state; 473 u32 ana_grpid; 474 #endif 475 struct list_head siblings; 476 struct kref kref; 477 struct nvme_ns_head *head; 478 479 int lba_shift; 480 u16 ms; 481 u16 pi_size; 482 u16 sgs; 483 u32 sws; 484 u8 pi_type; 485 u8 guard_type; 486 #ifdef CONFIG_BLK_DEV_ZONED 487 u64 zsze; 488 #endif 489 unsigned long features; 490 unsigned long flags; 491 #define NVME_NS_REMOVING 0 492 #define NVME_NS_ANA_PENDING 2 493 #define NVME_NS_FORCE_RO 3 494 #define NVME_NS_READY 4 495 496 struct cdev cdev; 497 struct device cdev_device; 498 499 struct nvme_fault_inject fault_inject; 500 501 }; 502 503 /* NVMe ns supports metadata actions by the controller (generate/strip) */ 504 static inline bool nvme_ns_has_pi(struct nvme_ns *ns) 505 { 506 return ns->pi_type && ns->ms == ns->pi_size; 507 } 508 509 struct nvme_ctrl_ops { 510 const char *name; 511 struct module *module; 512 unsigned int flags; 513 #define NVME_F_FABRICS (1 << 0) 514 #define NVME_F_METADATA_SUPPORTED (1 << 1) 515 #define NVME_F_BLOCKING (1 << 2) 516 517 const struct attribute_group **dev_attr_groups; 518 int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val); 519 int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val); 520 int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val); 521 void (*free_ctrl)(struct nvme_ctrl *ctrl); 522 void (*submit_async_event)(struct nvme_ctrl *ctrl); 523 void (*delete_ctrl)(struct nvme_ctrl *ctrl); 524 void (*stop_ctrl)(struct nvme_ctrl *ctrl); 525 int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size); 526 void (*print_device_info)(struct nvme_ctrl *ctrl); 527 bool (*supports_pci_p2pdma)(struct nvme_ctrl *ctrl); 528 }; 529 530 /* 531 * nvme command_id is constructed as such: 532 * | xxxx | xxxxxxxxxxxx | 533 * gen request tag 534 */ 535 #define nvme_genctr_mask(gen) (gen & 0xf) 536 #define nvme_cid_install_genctr(gen) (nvme_genctr_mask(gen) << 12) 537 #define nvme_genctr_from_cid(cid) ((cid & 0xf000) >> 12) 538 #define nvme_tag_from_cid(cid) (cid & 0xfff) 539 540 static inline u16 nvme_cid(struct request *rq) 541 { 542 return nvme_cid_install_genctr(nvme_req(rq)->genctr) | rq->tag; 543 } 544 545 static inline struct request *nvme_find_rq(struct blk_mq_tags *tags, 546 u16 command_id) 547 { 548 u8 genctr = nvme_genctr_from_cid(command_id); 549 u16 tag = nvme_tag_from_cid(command_id); 550 struct request *rq; 551 552 rq = blk_mq_tag_to_rq(tags, tag); 553 if (unlikely(!rq)) { 554 pr_err("could not locate request for tag %#x\n", 555 tag); 556 return NULL; 557 } 558 if (unlikely(nvme_genctr_mask(nvme_req(rq)->genctr) != genctr)) { 559 dev_err(nvme_req(rq)->ctrl->device, 560 "request %#x genctr mismatch (got %#x expected %#x)\n", 561 tag, genctr, nvme_genctr_mask(nvme_req(rq)->genctr)); 562 return NULL; 563 } 564 return rq; 565 } 566 567 static inline struct request *nvme_cid_to_rq(struct blk_mq_tags *tags, 568 u16 command_id) 569 { 570 return blk_mq_tag_to_rq(tags, nvme_tag_from_cid(command_id)); 571 } 572 573 /* 574 * Return the length of the string without the space padding 575 */ 576 static inline int nvme_strlen(char *s, int len) 577 { 578 while (s[len - 1] == ' ') 579 len--; 580 return len; 581 } 582 583 static inline void nvme_print_device_info(struct nvme_ctrl *ctrl) 584 { 585 struct nvme_subsystem *subsys = ctrl->subsys; 586 587 if (ctrl->ops->print_device_info) { 588 ctrl->ops->print_device_info(ctrl); 589 return; 590 } 591 592 dev_err(ctrl->device, 593 "VID:%04x model:%.*s firmware:%.*s\n", subsys->vendor_id, 594 nvme_strlen(subsys->model, sizeof(subsys->model)), 595 subsys->model, nvme_strlen(subsys->firmware_rev, 596 sizeof(subsys->firmware_rev)), 597 subsys->firmware_rev); 598 } 599 600 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS 601 void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj, 602 const char *dev_name); 603 void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inject); 604 void nvme_should_fail(struct request *req); 605 #else 606 static inline void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj, 607 const char *dev_name) 608 { 609 } 610 static inline void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inj) 611 { 612 } 613 static inline void nvme_should_fail(struct request *req) {} 614 #endif 615 616 bool nvme_wait_reset(struct nvme_ctrl *ctrl); 617 int nvme_try_sched_reset(struct nvme_ctrl *ctrl); 618 619 static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl) 620 { 621 int ret; 622 623 if (!ctrl->subsystem) 624 return -ENOTTY; 625 if (!nvme_wait_reset(ctrl)) 626 return -EBUSY; 627 628 ret = ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65); 629 if (ret) 630 return ret; 631 632 return nvme_try_sched_reset(ctrl); 633 } 634 635 /* 636 * Convert a 512B sector number to a device logical block number. 637 */ 638 static inline u64 nvme_sect_to_lba(struct nvme_ns *ns, sector_t sector) 639 { 640 return sector >> (ns->lba_shift - SECTOR_SHIFT); 641 } 642 643 /* 644 * Convert a device logical block number to a 512B sector number. 645 */ 646 static inline sector_t nvme_lba_to_sect(struct nvme_ns *ns, u64 lba) 647 { 648 return lba << (ns->lba_shift - SECTOR_SHIFT); 649 } 650 651 /* 652 * Convert byte length to nvme's 0-based num dwords 653 */ 654 static inline u32 nvme_bytes_to_numd(size_t len) 655 { 656 return (len >> 2) - 1; 657 } 658 659 static inline bool nvme_is_ana_error(u16 status) 660 { 661 switch (status & 0x7ff) { 662 case NVME_SC_ANA_TRANSITION: 663 case NVME_SC_ANA_INACCESSIBLE: 664 case NVME_SC_ANA_PERSISTENT_LOSS: 665 return true; 666 default: 667 return false; 668 } 669 } 670 671 static inline bool nvme_is_path_error(u16 status) 672 { 673 /* check for a status code type of 'path related status' */ 674 return (status & 0x700) == 0x300; 675 } 676 677 /* 678 * Fill in the status and result information from the CQE, and then figure out 679 * if blk-mq will need to use IPI magic to complete the request, and if yes do 680 * so. If not let the caller complete the request without an indirect function 681 * call. 682 */ 683 static inline bool nvme_try_complete_req(struct request *req, __le16 status, 684 union nvme_result result) 685 { 686 struct nvme_request *rq = nvme_req(req); 687 struct nvme_ctrl *ctrl = rq->ctrl; 688 689 if (!(ctrl->quirks & NVME_QUIRK_SKIP_CID_GEN)) 690 rq->genctr++; 691 692 rq->status = le16_to_cpu(status) >> 1; 693 rq->result = result; 694 /* inject error when permitted by fault injection framework */ 695 nvme_should_fail(req); 696 if (unlikely(blk_should_fake_timeout(req->q))) 697 return true; 698 return blk_mq_complete_request_remote(req); 699 } 700 701 static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl) 702 { 703 get_device(ctrl->device); 704 } 705 706 static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl) 707 { 708 put_device(ctrl->device); 709 } 710 711 static inline bool nvme_is_aen_req(u16 qid, __u16 command_id) 712 { 713 return !qid && 714 nvme_tag_from_cid(command_id) >= NVME_AQ_BLK_MQ_DEPTH; 715 } 716 717 void nvme_complete_rq(struct request *req); 718 void nvme_complete_batch_req(struct request *req); 719 720 static __always_inline void nvme_complete_batch(struct io_comp_batch *iob, 721 void (*fn)(struct request *rq)) 722 { 723 struct request *req; 724 725 rq_list_for_each(&iob->req_list, req) { 726 fn(req); 727 nvme_complete_batch_req(req); 728 } 729 blk_mq_end_request_batch(iob); 730 } 731 732 blk_status_t nvme_host_path_error(struct request *req); 733 bool nvme_cancel_request(struct request *req, void *data); 734 void nvme_cancel_tagset(struct nvme_ctrl *ctrl); 735 void nvme_cancel_admin_tagset(struct nvme_ctrl *ctrl); 736 bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, 737 enum nvme_ctrl_state new_state); 738 int nvme_disable_ctrl(struct nvme_ctrl *ctrl, bool shutdown); 739 int nvme_enable_ctrl(struct nvme_ctrl *ctrl); 740 int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, 741 const struct nvme_ctrl_ops *ops, unsigned long quirks); 742 void nvme_uninit_ctrl(struct nvme_ctrl *ctrl); 743 void nvme_start_ctrl(struct nvme_ctrl *ctrl); 744 void nvme_stop_ctrl(struct nvme_ctrl *ctrl); 745 int nvme_init_ctrl_finish(struct nvme_ctrl *ctrl, bool was_suspended); 746 int nvme_alloc_admin_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set, 747 const struct blk_mq_ops *ops, unsigned int cmd_size); 748 void nvme_remove_admin_tag_set(struct nvme_ctrl *ctrl); 749 int nvme_alloc_io_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set, 750 const struct blk_mq_ops *ops, unsigned int nr_maps, 751 unsigned int cmd_size); 752 void nvme_remove_io_tag_set(struct nvme_ctrl *ctrl); 753 754 void nvme_remove_namespaces(struct nvme_ctrl *ctrl); 755 756 void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status, 757 volatile union nvme_result *res); 758 759 void nvme_quiesce_io_queues(struct nvme_ctrl *ctrl); 760 void nvme_unquiesce_io_queues(struct nvme_ctrl *ctrl); 761 void nvme_quiesce_admin_queue(struct nvme_ctrl *ctrl); 762 void nvme_unquiesce_admin_queue(struct nvme_ctrl *ctrl); 763 void nvme_mark_namespaces_dead(struct nvme_ctrl *ctrl); 764 void nvme_sync_queues(struct nvme_ctrl *ctrl); 765 void nvme_sync_io_queues(struct nvme_ctrl *ctrl); 766 void nvme_unfreeze(struct nvme_ctrl *ctrl); 767 void nvme_wait_freeze(struct nvme_ctrl *ctrl); 768 int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout); 769 void nvme_start_freeze(struct nvme_ctrl *ctrl); 770 771 static inline enum req_op nvme_req_op(struct nvme_command *cmd) 772 { 773 return nvme_is_write(cmd) ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN; 774 } 775 776 #define NVME_QID_ANY -1 777 void nvme_init_request(struct request *req, struct nvme_command *cmd); 778 void nvme_cleanup_cmd(struct request *req); 779 blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req); 780 blk_status_t nvme_fail_nonready_command(struct nvme_ctrl *ctrl, 781 struct request *req); 782 bool __nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq, 783 bool queue_live); 784 785 static inline bool nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq, 786 bool queue_live) 787 { 788 if (likely(ctrl->state == NVME_CTRL_LIVE)) 789 return true; 790 if (ctrl->ops->flags & NVME_F_FABRICS && 791 ctrl->state == NVME_CTRL_DELETING) 792 return queue_live; 793 return __nvme_check_ready(ctrl, rq, queue_live); 794 } 795 796 /* 797 * NSID shall be unique for all shared namespaces, or if at least one of the 798 * following conditions is met: 799 * 1. Namespace Management is supported by the controller 800 * 2. ANA is supported by the controller 801 * 3. NVM Set are supported by the controller 802 * 803 * In other case, private namespace are not required to report a unique NSID. 804 */ 805 static inline bool nvme_is_unique_nsid(struct nvme_ctrl *ctrl, 806 struct nvme_ns_head *head) 807 { 808 return head->shared || 809 (ctrl->oacs & NVME_CTRL_OACS_NS_MNGT_SUPP) || 810 (ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA) || 811 (ctrl->ctratt & NVME_CTRL_CTRATT_NVM_SETS); 812 } 813 814 int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, 815 void *buf, unsigned bufflen); 816 int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, 817 union nvme_result *result, void *buffer, unsigned bufflen, 818 int qid, int at_head, 819 blk_mq_req_flags_t flags); 820 int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid, 821 unsigned int dword11, void *buffer, size_t buflen, 822 u32 *result); 823 int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid, 824 unsigned int dword11, void *buffer, size_t buflen, 825 u32 *result); 826 int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count); 827 void nvme_stop_keep_alive(struct nvme_ctrl *ctrl); 828 int nvme_reset_ctrl(struct nvme_ctrl *ctrl); 829 int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl); 830 int nvme_delete_ctrl(struct nvme_ctrl *ctrl); 831 void nvme_queue_scan(struct nvme_ctrl *ctrl); 832 int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi, 833 void *log, size_t size, u64 offset); 834 bool nvme_tryget_ns_head(struct nvme_ns_head *head); 835 void nvme_put_ns_head(struct nvme_ns_head *head); 836 int nvme_cdev_add(struct cdev *cdev, struct device *cdev_device, 837 const struct file_operations *fops, struct module *owner); 838 void nvme_cdev_del(struct cdev *cdev, struct device *cdev_device); 839 int nvme_ioctl(struct block_device *bdev, fmode_t mode, 840 unsigned int cmd, unsigned long arg); 841 long nvme_ns_chr_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 842 int nvme_ns_head_ioctl(struct block_device *bdev, fmode_t mode, 843 unsigned int cmd, unsigned long arg); 844 long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd, 845 unsigned long arg); 846 long nvme_dev_ioctl(struct file *file, unsigned int cmd, 847 unsigned long arg); 848 int nvme_ns_chr_uring_cmd_iopoll(struct io_uring_cmd *ioucmd, 849 struct io_comp_batch *iob, unsigned int poll_flags); 850 int nvme_ns_head_chr_uring_cmd_iopoll(struct io_uring_cmd *ioucmd, 851 struct io_comp_batch *iob, unsigned int poll_flags); 852 int nvme_ns_chr_uring_cmd(struct io_uring_cmd *ioucmd, 853 unsigned int issue_flags); 854 int nvme_ns_head_chr_uring_cmd(struct io_uring_cmd *ioucmd, 855 unsigned int issue_flags); 856 int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo); 857 int nvme_dev_uring_cmd(struct io_uring_cmd *ioucmd, unsigned int issue_flags); 858 859 extern const struct attribute_group *nvme_ns_id_attr_groups[]; 860 extern const struct pr_ops nvme_pr_ops; 861 extern const struct block_device_operations nvme_ns_head_ops; 862 extern const struct attribute_group nvme_dev_attrs_group; 863 864 struct nvme_ns *nvme_find_path(struct nvme_ns_head *head); 865 #ifdef CONFIG_NVME_MULTIPATH 866 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl) 867 { 868 return ctrl->ana_log_buf != NULL; 869 } 870 871 void nvme_mpath_unfreeze(struct nvme_subsystem *subsys); 872 void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys); 873 void nvme_mpath_start_freeze(struct nvme_subsystem *subsys); 874 void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys); 875 void nvme_failover_req(struct request *req); 876 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl); 877 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head); 878 void nvme_mpath_add_disk(struct nvme_ns *ns, __le32 anagrpid); 879 void nvme_mpath_remove_disk(struct nvme_ns_head *head); 880 int nvme_mpath_init_identify(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id); 881 void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl); 882 void nvme_mpath_update(struct nvme_ctrl *ctrl); 883 void nvme_mpath_uninit(struct nvme_ctrl *ctrl); 884 void nvme_mpath_stop(struct nvme_ctrl *ctrl); 885 bool nvme_mpath_clear_current_path(struct nvme_ns *ns); 886 void nvme_mpath_revalidate_paths(struct nvme_ns *ns); 887 void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl); 888 void nvme_mpath_shutdown_disk(struct nvme_ns_head *head); 889 void nvme_mpath_start_request(struct request *rq); 890 void nvme_mpath_end_request(struct request *rq); 891 892 static inline void nvme_trace_bio_complete(struct request *req) 893 { 894 struct nvme_ns *ns = req->q->queuedata; 895 896 if (req->cmd_flags & REQ_NVME_MPATH) 897 trace_block_bio_complete(ns->head->disk->queue, req->bio); 898 } 899 900 extern bool multipath; 901 extern struct device_attribute dev_attr_ana_grpid; 902 extern struct device_attribute dev_attr_ana_state; 903 extern struct device_attribute subsys_attr_iopolicy; 904 905 #else 906 #define multipath false 907 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl) 908 { 909 return false; 910 } 911 static inline void nvme_failover_req(struct request *req) 912 { 913 } 914 static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl) 915 { 916 } 917 static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, 918 struct nvme_ns_head *head) 919 { 920 return 0; 921 } 922 static inline void nvme_mpath_add_disk(struct nvme_ns *ns, __le32 anagrpid) 923 { 924 } 925 static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head) 926 { 927 } 928 static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns) 929 { 930 return false; 931 } 932 static inline void nvme_mpath_revalidate_paths(struct nvme_ns *ns) 933 { 934 } 935 static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl) 936 { 937 } 938 static inline void nvme_mpath_shutdown_disk(struct nvme_ns_head *head) 939 { 940 } 941 static inline void nvme_trace_bio_complete(struct request *req) 942 { 943 } 944 static inline void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl) 945 { 946 } 947 static inline int nvme_mpath_init_identify(struct nvme_ctrl *ctrl, 948 struct nvme_id_ctrl *id) 949 { 950 if (ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA) 951 dev_warn(ctrl->device, 952 "Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n"); 953 return 0; 954 } 955 static inline void nvme_mpath_update(struct nvme_ctrl *ctrl) 956 { 957 } 958 static inline void nvme_mpath_uninit(struct nvme_ctrl *ctrl) 959 { 960 } 961 static inline void nvme_mpath_stop(struct nvme_ctrl *ctrl) 962 { 963 } 964 static inline void nvme_mpath_unfreeze(struct nvme_subsystem *subsys) 965 { 966 } 967 static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys) 968 { 969 } 970 static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys) 971 { 972 } 973 static inline void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys) 974 { 975 } 976 static inline void nvme_mpath_start_request(struct request *rq) 977 { 978 } 979 static inline void nvme_mpath_end_request(struct request *rq) 980 { 981 } 982 #endif /* CONFIG_NVME_MULTIPATH */ 983 984 int nvme_revalidate_zones(struct nvme_ns *ns); 985 int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector, 986 unsigned int nr_zones, report_zones_cb cb, void *data); 987 #ifdef CONFIG_BLK_DEV_ZONED 988 int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf); 989 blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req, 990 struct nvme_command *cmnd, 991 enum nvme_zone_mgmt_action action); 992 #else 993 static inline blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, 994 struct request *req, struct nvme_command *cmnd, 995 enum nvme_zone_mgmt_action action) 996 { 997 return BLK_STS_NOTSUPP; 998 } 999 1000 static inline int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf) 1001 { 1002 dev_warn(ns->ctrl->device, 1003 "Please enable CONFIG_BLK_DEV_ZONED to support ZNS devices\n"); 1004 return -EPROTONOSUPPORT; 1005 } 1006 #endif 1007 1008 static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev) 1009 { 1010 return dev_to_disk(dev)->private_data; 1011 } 1012 1013 #ifdef CONFIG_NVME_HWMON 1014 int nvme_hwmon_init(struct nvme_ctrl *ctrl); 1015 void nvme_hwmon_exit(struct nvme_ctrl *ctrl); 1016 #else 1017 static inline int nvme_hwmon_init(struct nvme_ctrl *ctrl) 1018 { 1019 return 0; 1020 } 1021 1022 static inline void nvme_hwmon_exit(struct nvme_ctrl *ctrl) 1023 { 1024 } 1025 #endif 1026 1027 static inline void nvme_start_request(struct request *rq) 1028 { 1029 if (rq->cmd_flags & REQ_NVME_MPATH) 1030 nvme_mpath_start_request(rq); 1031 blk_mq_start_request(rq); 1032 } 1033 1034 static inline bool nvme_ctrl_sgl_supported(struct nvme_ctrl *ctrl) 1035 { 1036 return ctrl->sgls & ((1 << 0) | (1 << 1)); 1037 } 1038 1039 #ifdef CONFIG_NVME_AUTH 1040 int __init nvme_init_auth(void); 1041 void __exit nvme_exit_auth(void); 1042 int nvme_auth_init_ctrl(struct nvme_ctrl *ctrl); 1043 void nvme_auth_stop(struct nvme_ctrl *ctrl); 1044 int nvme_auth_negotiate(struct nvme_ctrl *ctrl, int qid); 1045 int nvme_auth_wait(struct nvme_ctrl *ctrl, int qid); 1046 void nvme_auth_free(struct nvme_ctrl *ctrl); 1047 #else 1048 static inline int nvme_auth_init_ctrl(struct nvme_ctrl *ctrl) 1049 { 1050 return 0; 1051 } 1052 static inline int __init nvme_init_auth(void) 1053 { 1054 return 0; 1055 } 1056 static inline void __exit nvme_exit_auth(void) 1057 { 1058 } 1059 static inline void nvme_auth_stop(struct nvme_ctrl *ctrl) {}; 1060 static inline int nvme_auth_negotiate(struct nvme_ctrl *ctrl, int qid) 1061 { 1062 return -EPROTONOSUPPORT; 1063 } 1064 static inline int nvme_auth_wait(struct nvme_ctrl *ctrl, int qid) 1065 { 1066 return NVME_SC_AUTH_REQUIRED; 1067 } 1068 static inline void nvme_auth_free(struct nvme_ctrl *ctrl) {}; 1069 #endif 1070 1071 u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns, 1072 u8 opcode); 1073 int nvme_execute_passthru_rq(struct request *rq, u32 *effects); 1074 void nvme_passthru_end(struct nvme_ctrl *ctrl, u32 effects, 1075 struct nvme_command *cmd, int status); 1076 struct nvme_ctrl *nvme_ctrl_from_file(struct file *file); 1077 struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid); 1078 void nvme_put_ns(struct nvme_ns *ns); 1079 1080 static inline bool nvme_multi_css(struct nvme_ctrl *ctrl) 1081 { 1082 return (ctrl->ctrl_config & NVME_CC_CSS_MASK) == NVME_CC_CSS_CSI; 1083 } 1084 1085 #ifdef CONFIG_NVME_VERBOSE_ERRORS 1086 const unsigned char *nvme_get_error_status_str(u16 status); 1087 const unsigned char *nvme_get_opcode_str(u8 opcode); 1088 const unsigned char *nvme_get_admin_opcode_str(u8 opcode); 1089 #else /* CONFIG_NVME_VERBOSE_ERRORS */ 1090 static inline const unsigned char *nvme_get_error_status_str(u16 status) 1091 { 1092 return "I/O Error"; 1093 } 1094 static inline const unsigned char *nvme_get_opcode_str(u8 opcode) 1095 { 1096 return "I/O Cmd"; 1097 } 1098 static inline const unsigned char *nvme_get_admin_opcode_str(u8 opcode) 1099 { 1100 return "Admin Cmd"; 1101 } 1102 #endif /* CONFIG_NVME_VERBOSE_ERRORS */ 1103 1104 #endif /* _NVME_H */ 1105