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/lightnvm.h> 15 #include <linux/sed-opal.h> 16 #include <linux/fault-inject.h> 17 #include <linux/rcupdate.h> 18 #include <linux/wait.h> 19 #include <linux/t10-pi.h> 20 21 #include <trace/events/block.h> 22 23 extern unsigned int nvme_io_timeout; 24 #define NVME_IO_TIMEOUT (nvme_io_timeout * HZ) 25 26 extern unsigned int admin_timeout; 27 #define NVME_ADMIN_TIMEOUT (admin_timeout * HZ) 28 29 #define NVME_DEFAULT_KATO 5 30 #define NVME_KATO_GRACE 10 31 32 #ifdef CONFIG_ARCH_NO_SG_CHAIN 33 #define NVME_INLINE_SG_CNT 0 34 #define NVME_INLINE_METADATA_SG_CNT 0 35 #else 36 #define NVME_INLINE_SG_CNT 2 37 #define NVME_INLINE_METADATA_SG_CNT 1 38 #endif 39 40 /* 41 * Default to a 4K page size, with the intention to update this 42 * path in the future to accommodate architectures with differing 43 * kernel and IO page sizes. 44 */ 45 #define NVME_CTRL_PAGE_SHIFT 12 46 #define NVME_CTRL_PAGE_SIZE (1 << NVME_CTRL_PAGE_SHIFT) 47 48 extern struct workqueue_struct *nvme_wq; 49 extern struct workqueue_struct *nvme_reset_wq; 50 extern struct workqueue_struct *nvme_delete_wq; 51 52 enum { 53 NVME_NS_LBA = 0, 54 NVME_NS_LIGHTNVM = 1, 55 }; 56 57 /* 58 * List of workarounds for devices that required behavior not specified in 59 * the standard. 60 */ 61 enum nvme_quirks { 62 /* 63 * Prefers I/O aligned to a stripe size specified in a vendor 64 * specific Identify field. 65 */ 66 NVME_QUIRK_STRIPE_SIZE = (1 << 0), 67 68 /* 69 * The controller doesn't handle Identify value others than 0 or 1 70 * correctly. 71 */ 72 NVME_QUIRK_IDENTIFY_CNS = (1 << 1), 73 74 /* 75 * The controller deterministically returns O's on reads to 76 * logical blocks that deallocate was called on. 77 */ 78 NVME_QUIRK_DEALLOCATE_ZEROES = (1 << 2), 79 80 /* 81 * The controller needs a delay before starts checking the device 82 * readiness, which is done by reading the NVME_CSTS_RDY bit. 83 */ 84 NVME_QUIRK_DELAY_BEFORE_CHK_RDY = (1 << 3), 85 86 /* 87 * APST should not be used. 88 */ 89 NVME_QUIRK_NO_APST = (1 << 4), 90 91 /* 92 * The deepest sleep state should not be used. 93 */ 94 NVME_QUIRK_NO_DEEPEST_PS = (1 << 5), 95 96 /* 97 * Supports the LighNVM command set if indicated in vs[1]. 98 */ 99 NVME_QUIRK_LIGHTNVM = (1 << 6), 100 101 /* 102 * Set MEDIUM priority on SQ creation 103 */ 104 NVME_QUIRK_MEDIUM_PRIO_SQ = (1 << 7), 105 106 /* 107 * Ignore device provided subnqn. 108 */ 109 NVME_QUIRK_IGNORE_DEV_SUBNQN = (1 << 8), 110 111 /* 112 * Broken Write Zeroes. 113 */ 114 NVME_QUIRK_DISABLE_WRITE_ZEROES = (1 << 9), 115 116 /* 117 * Force simple suspend/resume path. 118 */ 119 NVME_QUIRK_SIMPLE_SUSPEND = (1 << 10), 120 121 /* 122 * Use only one interrupt vector for all queues 123 */ 124 NVME_QUIRK_SINGLE_VECTOR = (1 << 11), 125 126 /* 127 * Use non-standard 128 bytes SQEs. 128 */ 129 NVME_QUIRK_128_BYTES_SQES = (1 << 12), 130 131 /* 132 * Prevent tag overlap between queues 133 */ 134 NVME_QUIRK_SHARED_TAGS = (1 << 13), 135 136 /* 137 * Don't change the value of the temperature threshold feature 138 */ 139 NVME_QUIRK_NO_TEMP_THRESH_CHANGE = (1 << 14), 140 141 /* 142 * The controller doesn't handle the Identify Namespace 143 * Identification Descriptor list subcommand despite claiming 144 * NVMe 1.3 compliance. 145 */ 146 NVME_QUIRK_NO_NS_DESC_LIST = (1 << 15), 147 }; 148 149 /* 150 * Common request structure for NVMe passthrough. All drivers must have 151 * this structure as the first member of their request-private data. 152 */ 153 struct nvme_request { 154 struct nvme_command *cmd; 155 union nvme_result result; 156 u8 retries; 157 u8 flags; 158 u16 status; 159 struct nvme_ctrl *ctrl; 160 }; 161 162 /* 163 * Mark a bio as coming in through the mpath node. 164 */ 165 #define REQ_NVME_MPATH REQ_DRV 166 167 enum { 168 NVME_REQ_CANCELLED = (1 << 0), 169 NVME_REQ_USERCMD = (1 << 1), 170 }; 171 172 static inline struct nvme_request *nvme_req(struct request *req) 173 { 174 return blk_mq_rq_to_pdu(req); 175 } 176 177 static inline u16 nvme_req_qid(struct request *req) 178 { 179 if (!req->q->queuedata) 180 return 0; 181 182 return req->mq_hctx->queue_num + 1; 183 } 184 185 /* The below value is the specific amount of delay needed before checking 186 * readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the 187 * NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was 188 * found empirically. 189 */ 190 #define NVME_QUIRK_DELAY_AMOUNT 2300 191 192 /* 193 * enum nvme_ctrl_state: Controller state 194 * 195 * @NVME_CTRL_NEW: New controller just allocated, initial state 196 * @NVME_CTRL_LIVE: Controller is connected and I/O capable 197 * @NVME_CTRL_RESETTING: Controller is resetting (or scheduled reset) 198 * @NVME_CTRL_CONNECTING: Controller is disconnected, now connecting the 199 * transport 200 * @NVME_CTRL_DELETING: Controller is deleting (or scheduled deletion) 201 * @NVME_CTRL_DELETING_NOIO: Controller is deleting and I/O is not 202 * disabled/failed immediately. This state comes 203 * after all async event processing took place and 204 * before ns removal and the controller deletion 205 * progress 206 * @NVME_CTRL_DEAD: Controller is non-present/unresponsive during 207 * shutdown or removal. In this case we forcibly 208 * kill all inflight I/O as they have no chance to 209 * complete 210 */ 211 enum nvme_ctrl_state { 212 NVME_CTRL_NEW, 213 NVME_CTRL_LIVE, 214 NVME_CTRL_RESETTING, 215 NVME_CTRL_CONNECTING, 216 NVME_CTRL_DELETING, 217 NVME_CTRL_DELETING_NOIO, 218 NVME_CTRL_DEAD, 219 }; 220 221 struct nvme_fault_inject { 222 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS 223 struct fault_attr attr; 224 struct dentry *parent; 225 bool dont_retry; /* DNR, do not retry */ 226 u16 status; /* status code */ 227 #endif 228 }; 229 230 struct nvme_ctrl { 231 bool comp_seen; 232 enum nvme_ctrl_state state; 233 bool identified; 234 spinlock_t lock; 235 struct mutex scan_lock; 236 const struct nvme_ctrl_ops *ops; 237 struct request_queue *admin_q; 238 struct request_queue *connect_q; 239 struct request_queue *fabrics_q; 240 struct device *dev; 241 int instance; 242 int numa_node; 243 struct blk_mq_tag_set *tagset; 244 struct blk_mq_tag_set *admin_tagset; 245 struct list_head namespaces; 246 struct rw_semaphore namespaces_rwsem; 247 struct device ctrl_device; 248 struct device *device; /* char device */ 249 struct cdev cdev; 250 struct work_struct reset_work; 251 struct work_struct delete_work; 252 wait_queue_head_t state_wq; 253 254 struct nvme_subsystem *subsys; 255 struct list_head subsys_entry; 256 257 struct opal_dev *opal_dev; 258 259 char name[12]; 260 u16 cntlid; 261 262 u32 ctrl_config; 263 u16 mtfa; 264 u32 queue_count; 265 266 u64 cap; 267 u32 max_hw_sectors; 268 u32 max_segments; 269 u32 max_integrity_segments; 270 #ifdef CONFIG_BLK_DEV_ZONED 271 u32 max_zone_append; 272 #endif 273 u16 crdt[3]; 274 u16 oncs; 275 u16 oacs; 276 u16 nssa; 277 u16 nr_streams; 278 u16 sqsize; 279 u32 max_namespaces; 280 atomic_t abort_limit; 281 u8 vwc; 282 u32 vs; 283 u32 sgls; 284 u16 kas; 285 u8 npss; 286 u8 apsta; 287 u16 wctemp; 288 u16 cctemp; 289 u32 oaes; 290 u32 aen_result; 291 u32 ctratt; 292 unsigned int shutdown_timeout; 293 unsigned int kato; 294 bool subsystem; 295 unsigned long quirks; 296 struct nvme_id_power_state psd[32]; 297 struct nvme_effects_log *effects; 298 struct xarray cels; 299 struct work_struct scan_work; 300 struct work_struct async_event_work; 301 struct delayed_work ka_work; 302 struct delayed_work failfast_work; 303 struct nvme_command ka_cmd; 304 struct work_struct fw_act_work; 305 unsigned long events; 306 307 #ifdef CONFIG_NVME_MULTIPATH 308 /* asymmetric namespace access: */ 309 u8 anacap; 310 u8 anatt; 311 u32 anagrpmax; 312 u32 nanagrpid; 313 struct mutex ana_lock; 314 struct nvme_ana_rsp_hdr *ana_log_buf; 315 size_t ana_log_size; 316 struct timer_list anatt_timer; 317 struct work_struct ana_work; 318 #endif 319 320 /* Power saving configuration */ 321 u64 ps_max_latency_us; 322 bool apst_enabled; 323 324 /* PCIe only: */ 325 u32 hmpre; 326 u32 hmmin; 327 u32 hmminds; 328 u16 hmmaxd; 329 330 /* Fabrics only */ 331 u32 ioccsz; 332 u32 iorcsz; 333 u16 icdoff; 334 u16 maxcmd; 335 int nr_reconnects; 336 unsigned long flags; 337 #define NVME_CTRL_FAILFAST_EXPIRED 0 338 struct nvmf_ctrl_options *opts; 339 340 struct page *discard_page; 341 unsigned long discard_page_busy; 342 343 struct nvme_fault_inject fault_inject; 344 }; 345 346 enum nvme_iopolicy { 347 NVME_IOPOLICY_NUMA, 348 NVME_IOPOLICY_RR, 349 }; 350 351 struct nvme_subsystem { 352 int instance; 353 struct device dev; 354 /* 355 * Because we unregister the device on the last put we need 356 * a separate refcount. 357 */ 358 struct kref ref; 359 struct list_head entry; 360 struct mutex lock; 361 struct list_head ctrls; 362 struct list_head nsheads; 363 char subnqn[NVMF_NQN_SIZE]; 364 char serial[20]; 365 char model[40]; 366 char firmware_rev[8]; 367 u8 cmic; 368 u16 vendor_id; 369 u16 awupf; /* 0's based awupf value. */ 370 struct ida ns_ida; 371 #ifdef CONFIG_NVME_MULTIPATH 372 enum nvme_iopolicy iopolicy; 373 #endif 374 }; 375 376 /* 377 * Container structure for uniqueue namespace identifiers. 378 */ 379 struct nvme_ns_ids { 380 u8 eui64[8]; 381 u8 nguid[16]; 382 uuid_t uuid; 383 u8 csi; 384 }; 385 386 /* 387 * Anchor structure for namespaces. There is one for each namespace in a 388 * NVMe subsystem that any of our controllers can see, and the namespace 389 * structure for each controller is chained of it. For private namespaces 390 * there is a 1:1 relation to our namespace structures, that is ->list 391 * only ever has a single entry for private namespaces. 392 */ 393 struct nvme_ns_head { 394 struct list_head list; 395 struct srcu_struct srcu; 396 struct nvme_subsystem *subsys; 397 unsigned ns_id; 398 struct nvme_ns_ids ids; 399 struct list_head entry; 400 struct kref ref; 401 bool shared; 402 int instance; 403 struct nvme_effects_log *effects; 404 #ifdef CONFIG_NVME_MULTIPATH 405 struct gendisk *disk; 406 struct bio_list requeue_list; 407 spinlock_t requeue_lock; 408 struct work_struct requeue_work; 409 struct mutex lock; 410 unsigned long flags; 411 #define NVME_NSHEAD_DISK_LIVE 0 412 struct nvme_ns __rcu *current_path[]; 413 #endif 414 }; 415 416 enum nvme_ns_features { 417 NVME_NS_EXT_LBAS = 1 << 0, /* support extended LBA format */ 418 NVME_NS_METADATA_SUPPORTED = 1 << 1, /* support getting generated md */ 419 }; 420 421 struct nvme_ns { 422 struct list_head list; 423 424 struct nvme_ctrl *ctrl; 425 struct request_queue *queue; 426 struct gendisk *disk; 427 #ifdef CONFIG_NVME_MULTIPATH 428 enum nvme_ana_state ana_state; 429 u32 ana_grpid; 430 #endif 431 struct list_head siblings; 432 struct nvm_dev *ndev; 433 struct kref kref; 434 struct nvme_ns_head *head; 435 436 int lba_shift; 437 u16 ms; 438 u16 sgs; 439 u32 sws; 440 u8 pi_type; 441 #ifdef CONFIG_BLK_DEV_ZONED 442 u64 zsze; 443 #endif 444 unsigned long features; 445 unsigned long flags; 446 #define NVME_NS_REMOVING 0 447 #define NVME_NS_DEAD 1 448 #define NVME_NS_ANA_PENDING 2 449 #define NVME_NS_FORCE_RO 3 450 451 struct nvme_fault_inject fault_inject; 452 453 }; 454 455 /* NVMe ns supports metadata actions by the controller (generate/strip) */ 456 static inline bool nvme_ns_has_pi(struct nvme_ns *ns) 457 { 458 return ns->pi_type && ns->ms == sizeof(struct t10_pi_tuple); 459 } 460 461 struct nvme_ctrl_ops { 462 const char *name; 463 struct module *module; 464 unsigned int flags; 465 #define NVME_F_FABRICS (1 << 0) 466 #define NVME_F_METADATA_SUPPORTED (1 << 1) 467 #define NVME_F_PCI_P2PDMA (1 << 2) 468 int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val); 469 int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val); 470 int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val); 471 void (*free_ctrl)(struct nvme_ctrl *ctrl); 472 void (*submit_async_event)(struct nvme_ctrl *ctrl); 473 void (*delete_ctrl)(struct nvme_ctrl *ctrl); 474 int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size); 475 }; 476 477 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS 478 void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj, 479 const char *dev_name); 480 void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inject); 481 void nvme_should_fail(struct request *req); 482 #else 483 static inline void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj, 484 const char *dev_name) 485 { 486 } 487 static inline void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inj) 488 { 489 } 490 static inline void nvme_should_fail(struct request *req) {} 491 #endif 492 493 static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl) 494 { 495 if (!ctrl->subsystem) 496 return -ENOTTY; 497 return ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65); 498 } 499 500 /* 501 * Convert a 512B sector number to a device logical block number. 502 */ 503 static inline u64 nvme_sect_to_lba(struct nvme_ns *ns, sector_t sector) 504 { 505 return sector >> (ns->lba_shift - SECTOR_SHIFT); 506 } 507 508 /* 509 * Convert a device logical block number to a 512B sector number. 510 */ 511 static inline sector_t nvme_lba_to_sect(struct nvme_ns *ns, u64 lba) 512 { 513 return lba << (ns->lba_shift - SECTOR_SHIFT); 514 } 515 516 /* 517 * Convert byte length to nvme's 0-based num dwords 518 */ 519 static inline u32 nvme_bytes_to_numd(size_t len) 520 { 521 return (len >> 2) - 1; 522 } 523 524 static inline bool nvme_is_ana_error(u16 status) 525 { 526 switch (status & 0x7ff) { 527 case NVME_SC_ANA_TRANSITION: 528 case NVME_SC_ANA_INACCESSIBLE: 529 case NVME_SC_ANA_PERSISTENT_LOSS: 530 return true; 531 default: 532 return false; 533 } 534 } 535 536 static inline bool nvme_is_path_error(u16 status) 537 { 538 /* check for a status code type of 'path related status' */ 539 return (status & 0x700) == 0x300; 540 } 541 542 /* 543 * Fill in the status and result information from the CQE, and then figure out 544 * if blk-mq will need to use IPI magic to complete the request, and if yes do 545 * so. If not let the caller complete the request without an indirect function 546 * call. 547 */ 548 static inline bool nvme_try_complete_req(struct request *req, __le16 status, 549 union nvme_result result) 550 { 551 struct nvme_request *rq = nvme_req(req); 552 553 rq->status = le16_to_cpu(status) >> 1; 554 rq->result = result; 555 /* inject error when permitted by fault injection framework */ 556 nvme_should_fail(req); 557 if (unlikely(blk_should_fake_timeout(req->q))) 558 return true; 559 return blk_mq_complete_request_remote(req); 560 } 561 562 static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl) 563 { 564 get_device(ctrl->device); 565 } 566 567 static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl) 568 { 569 put_device(ctrl->device); 570 } 571 572 static inline bool nvme_is_aen_req(u16 qid, __u16 command_id) 573 { 574 return !qid && command_id >= NVME_AQ_BLK_MQ_DEPTH; 575 } 576 577 void nvme_complete_rq(struct request *req); 578 bool nvme_cancel_request(struct request *req, void *data, bool reserved); 579 bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, 580 enum nvme_ctrl_state new_state); 581 bool nvme_wait_reset(struct nvme_ctrl *ctrl); 582 int nvme_disable_ctrl(struct nvme_ctrl *ctrl); 583 int nvme_enable_ctrl(struct nvme_ctrl *ctrl); 584 int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl); 585 int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, 586 const struct nvme_ctrl_ops *ops, unsigned long quirks); 587 void nvme_uninit_ctrl(struct nvme_ctrl *ctrl); 588 void nvme_start_ctrl(struct nvme_ctrl *ctrl); 589 void nvme_stop_ctrl(struct nvme_ctrl *ctrl); 590 int nvme_init_identify(struct nvme_ctrl *ctrl); 591 592 void nvme_remove_namespaces(struct nvme_ctrl *ctrl); 593 594 int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len, 595 bool send); 596 597 void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status, 598 volatile union nvme_result *res); 599 600 void nvme_stop_queues(struct nvme_ctrl *ctrl); 601 void nvme_start_queues(struct nvme_ctrl *ctrl); 602 void nvme_kill_queues(struct nvme_ctrl *ctrl); 603 void nvme_sync_queues(struct nvme_ctrl *ctrl); 604 void nvme_sync_io_queues(struct nvme_ctrl *ctrl); 605 void nvme_unfreeze(struct nvme_ctrl *ctrl); 606 void nvme_wait_freeze(struct nvme_ctrl *ctrl); 607 int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout); 608 void nvme_start_freeze(struct nvme_ctrl *ctrl); 609 610 #define NVME_QID_ANY -1 611 struct request *nvme_alloc_request(struct request_queue *q, 612 struct nvme_command *cmd, blk_mq_req_flags_t flags); 613 void nvme_cleanup_cmd(struct request *req); 614 blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req, 615 struct nvme_command *cmd); 616 int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, 617 void *buf, unsigned bufflen); 618 int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, 619 union nvme_result *result, void *buffer, unsigned bufflen, 620 unsigned timeout, int qid, int at_head, 621 blk_mq_req_flags_t flags, bool poll); 622 int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid, 623 unsigned int dword11, void *buffer, size_t buflen, 624 u32 *result); 625 int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid, 626 unsigned int dword11, void *buffer, size_t buflen, 627 u32 *result); 628 int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count); 629 void nvme_stop_keep_alive(struct nvme_ctrl *ctrl); 630 int nvme_reset_ctrl(struct nvme_ctrl *ctrl); 631 int nvme_try_sched_reset(struct nvme_ctrl *ctrl); 632 int nvme_delete_ctrl(struct nvme_ctrl *ctrl); 633 634 int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi, 635 void *log, size_t size, u64 offset); 636 struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk, 637 struct nvme_ns_head **head, int *srcu_idx); 638 void nvme_put_ns_from_disk(struct nvme_ns_head *head, int idx); 639 640 extern const struct attribute_group *nvme_ns_id_attr_groups[]; 641 extern const struct block_device_operations nvme_ns_head_ops; 642 643 #ifdef CONFIG_NVME_MULTIPATH 644 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl) 645 { 646 return ctrl->ana_log_buf != NULL; 647 } 648 649 void nvme_mpath_unfreeze(struct nvme_subsystem *subsys); 650 void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys); 651 void nvme_mpath_start_freeze(struct nvme_subsystem *subsys); 652 void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns, 653 struct nvme_ctrl *ctrl, int *flags); 654 void nvme_failover_req(struct request *req); 655 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl); 656 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head); 657 void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id); 658 void nvme_mpath_remove_disk(struct nvme_ns_head *head); 659 int nvme_mpath_init(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id); 660 void nvme_mpath_uninit(struct nvme_ctrl *ctrl); 661 void nvme_mpath_stop(struct nvme_ctrl *ctrl); 662 bool nvme_mpath_clear_current_path(struct nvme_ns *ns); 663 void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl); 664 struct nvme_ns *nvme_find_path(struct nvme_ns_head *head); 665 blk_qc_t nvme_ns_head_submit_bio(struct bio *bio); 666 667 static inline void nvme_mpath_check_last_path(struct nvme_ns *ns) 668 { 669 struct nvme_ns_head *head = ns->head; 670 671 if (head->disk && list_empty(&head->list)) 672 kblockd_schedule_work(&head->requeue_work); 673 } 674 675 static inline void nvme_trace_bio_complete(struct request *req) 676 { 677 struct nvme_ns *ns = req->q->queuedata; 678 679 if (req->cmd_flags & REQ_NVME_MPATH) 680 trace_block_bio_complete(ns->head->disk->queue, req->bio); 681 } 682 683 extern struct device_attribute dev_attr_ana_grpid; 684 extern struct device_attribute dev_attr_ana_state; 685 extern struct device_attribute subsys_attr_iopolicy; 686 687 #else 688 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl) 689 { 690 return false; 691 } 692 /* 693 * Without the multipath code enabled, multiple controller per subsystems are 694 * visible as devices and thus we cannot use the subsystem instance. 695 */ 696 static inline void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns, 697 struct nvme_ctrl *ctrl, int *flags) 698 { 699 sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->head->instance); 700 } 701 702 static inline void nvme_failover_req(struct request *req) 703 { 704 } 705 static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl) 706 { 707 } 708 static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, 709 struct nvme_ns_head *head) 710 { 711 return 0; 712 } 713 static inline void nvme_mpath_add_disk(struct nvme_ns *ns, 714 struct nvme_id_ns *id) 715 { 716 } 717 static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head) 718 { 719 } 720 static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns) 721 { 722 return false; 723 } 724 static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl) 725 { 726 } 727 static inline void nvme_mpath_check_last_path(struct nvme_ns *ns) 728 { 729 } 730 static inline void nvme_trace_bio_complete(struct request *req) 731 { 732 } 733 static inline int nvme_mpath_init(struct nvme_ctrl *ctrl, 734 struct nvme_id_ctrl *id) 735 { 736 if (ctrl->subsys->cmic & (1 << 3)) 737 dev_warn(ctrl->device, 738 "Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n"); 739 return 0; 740 } 741 static inline void nvme_mpath_uninit(struct nvme_ctrl *ctrl) 742 { 743 } 744 static inline void nvme_mpath_stop(struct nvme_ctrl *ctrl) 745 { 746 } 747 static inline void nvme_mpath_unfreeze(struct nvme_subsystem *subsys) 748 { 749 } 750 static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys) 751 { 752 } 753 static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys) 754 { 755 } 756 #endif /* CONFIG_NVME_MULTIPATH */ 757 758 int nvme_revalidate_zones(struct nvme_ns *ns); 759 #ifdef CONFIG_BLK_DEV_ZONED 760 int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf); 761 int nvme_report_zones(struct gendisk *disk, sector_t sector, 762 unsigned int nr_zones, report_zones_cb cb, void *data); 763 764 blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req, 765 struct nvme_command *cmnd, 766 enum nvme_zone_mgmt_action action); 767 #else 768 #define nvme_report_zones NULL 769 770 static inline blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, 771 struct request *req, struct nvme_command *cmnd, 772 enum nvme_zone_mgmt_action action) 773 { 774 return BLK_STS_NOTSUPP; 775 } 776 777 static inline int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf) 778 { 779 dev_warn(ns->ctrl->device, 780 "Please enable CONFIG_BLK_DEV_ZONED to support ZNS devices\n"); 781 return -EPROTONOSUPPORT; 782 } 783 #endif 784 785 #ifdef CONFIG_NVM 786 int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node); 787 void nvme_nvm_unregister(struct nvme_ns *ns); 788 extern const struct attribute_group nvme_nvm_attr_group; 789 int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg); 790 #else 791 static inline int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, 792 int node) 793 { 794 return 0; 795 } 796 797 static inline void nvme_nvm_unregister(struct nvme_ns *ns) {}; 798 static inline int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, 799 unsigned long arg) 800 { 801 return -ENOTTY; 802 } 803 #endif /* CONFIG_NVM */ 804 805 static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev) 806 { 807 return dev_to_disk(dev)->private_data; 808 } 809 810 #ifdef CONFIG_NVME_HWMON 811 int nvme_hwmon_init(struct nvme_ctrl *ctrl); 812 #else 813 static inline int nvme_hwmon_init(struct nvme_ctrl *ctrl) 814 { 815 return 0; 816 } 817 #endif 818 819 u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns, 820 u8 opcode); 821 void nvme_execute_passthru_rq(struct request *rq); 822 struct nvme_ctrl *nvme_ctrl_from_file(struct file *file); 823 struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid); 824 void nvme_put_ns(struct nvme_ns *ns); 825 826 #endif /* _NVME_H */ 827