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 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 ADMIN_TIMEOUT (admin_timeout * HZ) 27 28 #define NVME_DEFAULT_KATO 5 29 #define NVME_KATO_GRACE 10 30 31 #ifdef CONFIG_ARCH_NO_SG_CHAIN 32 #define NVME_INLINE_SG_CNT 0 33 #else 34 #define NVME_INLINE_SG_CNT 2 35 #endif 36 37 extern struct workqueue_struct *nvme_wq; 38 extern struct workqueue_struct *nvme_reset_wq; 39 extern struct workqueue_struct *nvme_delete_wq; 40 41 enum { 42 NVME_NS_LBA = 0, 43 NVME_NS_LIGHTNVM = 1, 44 }; 45 46 /* 47 * List of workarounds for devices that required behavior not specified in 48 * the standard. 49 */ 50 enum nvme_quirks { 51 /* 52 * Prefers I/O aligned to a stripe size specified in a vendor 53 * specific Identify field. 54 */ 55 NVME_QUIRK_STRIPE_SIZE = (1 << 0), 56 57 /* 58 * The controller doesn't handle Identify value others than 0 or 1 59 * correctly. 60 */ 61 NVME_QUIRK_IDENTIFY_CNS = (1 << 1), 62 63 /* 64 * The controller deterministically returns O's on reads to 65 * logical blocks that deallocate was called on. 66 */ 67 NVME_QUIRK_DEALLOCATE_ZEROES = (1 << 2), 68 69 /* 70 * The controller needs a delay before starts checking the device 71 * readiness, which is done by reading the NVME_CSTS_RDY bit. 72 */ 73 NVME_QUIRK_DELAY_BEFORE_CHK_RDY = (1 << 3), 74 75 /* 76 * APST should not be used. 77 */ 78 NVME_QUIRK_NO_APST = (1 << 4), 79 80 /* 81 * The deepest sleep state should not be used. 82 */ 83 NVME_QUIRK_NO_DEEPEST_PS = (1 << 5), 84 85 /* 86 * Supports the LighNVM command set if indicated in vs[1]. 87 */ 88 NVME_QUIRK_LIGHTNVM = (1 << 6), 89 90 /* 91 * Set MEDIUM priority on SQ creation 92 */ 93 NVME_QUIRK_MEDIUM_PRIO_SQ = (1 << 7), 94 95 /* 96 * Ignore device provided subnqn. 97 */ 98 NVME_QUIRK_IGNORE_DEV_SUBNQN = (1 << 8), 99 100 /* 101 * Broken Write Zeroes. 102 */ 103 NVME_QUIRK_DISABLE_WRITE_ZEROES = (1 << 9), 104 105 /* 106 * Force simple suspend/resume path. 107 */ 108 NVME_QUIRK_SIMPLE_SUSPEND = (1 << 10), 109 110 /* 111 * Use only one interrupt vector for all queues 112 */ 113 NVME_QUIRK_SINGLE_VECTOR = (1 << 11), 114 115 /* 116 * Use non-standard 128 bytes SQEs. 117 */ 118 NVME_QUIRK_128_BYTES_SQES = (1 << 12), 119 120 /* 121 * Prevent tag overlap between queues 122 */ 123 NVME_QUIRK_SHARED_TAGS = (1 << 13), 124 125 /* 126 * Don't change the value of the temperature threshold feature 127 */ 128 NVME_QUIRK_NO_TEMP_THRESH_CHANGE = (1 << 14), 129 }; 130 131 /* 132 * Common request structure for NVMe passthrough. All drivers must have 133 * this structure as the first member of their request-private data. 134 */ 135 struct nvme_request { 136 struct nvme_command *cmd; 137 union nvme_result result; 138 u8 retries; 139 u8 flags; 140 u16 status; 141 struct nvme_ctrl *ctrl; 142 }; 143 144 /* 145 * Mark a bio as coming in through the mpath node. 146 */ 147 #define REQ_NVME_MPATH REQ_DRV 148 149 enum { 150 NVME_REQ_CANCELLED = (1 << 0), 151 NVME_REQ_USERCMD = (1 << 1), 152 }; 153 154 static inline struct nvme_request *nvme_req(struct request *req) 155 { 156 return blk_mq_rq_to_pdu(req); 157 } 158 159 static inline u16 nvme_req_qid(struct request *req) 160 { 161 if (!req->rq_disk) 162 return 0; 163 return blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(req)) + 1; 164 } 165 166 /* The below value is the specific amount of delay needed before checking 167 * readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the 168 * NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was 169 * found empirically. 170 */ 171 #define NVME_QUIRK_DELAY_AMOUNT 2300 172 173 enum nvme_ctrl_state { 174 NVME_CTRL_NEW, 175 NVME_CTRL_LIVE, 176 NVME_CTRL_RESETTING, 177 NVME_CTRL_CONNECTING, 178 NVME_CTRL_DELETING, 179 NVME_CTRL_DEAD, 180 }; 181 182 struct nvme_fault_inject { 183 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS 184 struct fault_attr attr; 185 struct dentry *parent; 186 bool dont_retry; /* DNR, do not retry */ 187 u16 status; /* status code */ 188 #endif 189 }; 190 191 struct nvme_ctrl { 192 bool comp_seen; 193 enum nvme_ctrl_state state; 194 bool identified; 195 spinlock_t lock; 196 struct mutex scan_lock; 197 const struct nvme_ctrl_ops *ops; 198 struct request_queue *admin_q; 199 struct request_queue *connect_q; 200 struct request_queue *fabrics_q; 201 struct device *dev; 202 int instance; 203 int numa_node; 204 struct blk_mq_tag_set *tagset; 205 struct blk_mq_tag_set *admin_tagset; 206 struct list_head namespaces; 207 struct rw_semaphore namespaces_rwsem; 208 struct device ctrl_device; 209 struct device *device; /* char device */ 210 struct cdev cdev; 211 struct work_struct reset_work; 212 struct work_struct delete_work; 213 wait_queue_head_t state_wq; 214 215 struct nvme_subsystem *subsys; 216 struct list_head subsys_entry; 217 218 struct opal_dev *opal_dev; 219 220 char name[12]; 221 u16 cntlid; 222 223 u32 ctrl_config; 224 u16 mtfa; 225 u32 queue_count; 226 227 u64 cap; 228 u32 page_size; 229 u32 max_hw_sectors; 230 u32 max_segments; 231 u16 crdt[3]; 232 u16 oncs; 233 u16 oacs; 234 u16 nssa; 235 u16 nr_streams; 236 u16 sqsize; 237 u32 max_namespaces; 238 atomic_t abort_limit; 239 u8 vwc; 240 u32 vs; 241 u32 sgls; 242 u16 kas; 243 u8 npss; 244 u8 apsta; 245 u16 wctemp; 246 u16 cctemp; 247 u32 oaes; 248 u32 aen_result; 249 u32 ctratt; 250 unsigned int shutdown_timeout; 251 unsigned int kato; 252 bool subsystem; 253 unsigned long quirks; 254 struct nvme_id_power_state psd[32]; 255 struct nvme_effects_log *effects; 256 struct work_struct scan_work; 257 struct work_struct async_event_work; 258 struct delayed_work ka_work; 259 struct nvme_command ka_cmd; 260 struct work_struct fw_act_work; 261 unsigned long events; 262 bool created; 263 264 #ifdef CONFIG_NVME_MULTIPATH 265 /* asymmetric namespace access: */ 266 u8 anacap; 267 u8 anatt; 268 u32 anagrpmax; 269 u32 nanagrpid; 270 struct mutex ana_lock; 271 struct nvme_ana_rsp_hdr *ana_log_buf; 272 size_t ana_log_size; 273 struct timer_list anatt_timer; 274 struct work_struct ana_work; 275 #endif 276 277 /* Power saving configuration */ 278 u64 ps_max_latency_us; 279 bool apst_enabled; 280 281 /* PCIe only: */ 282 u32 hmpre; 283 u32 hmmin; 284 u32 hmminds; 285 u16 hmmaxd; 286 287 /* Fabrics only */ 288 u32 ioccsz; 289 u32 iorcsz; 290 u16 icdoff; 291 u16 maxcmd; 292 int nr_reconnects; 293 struct nvmf_ctrl_options *opts; 294 295 struct page *discard_page; 296 unsigned long discard_page_busy; 297 298 struct nvme_fault_inject fault_inject; 299 }; 300 301 enum nvme_iopolicy { 302 NVME_IOPOLICY_NUMA, 303 NVME_IOPOLICY_RR, 304 }; 305 306 struct nvme_subsystem { 307 int instance; 308 struct device dev; 309 /* 310 * Because we unregister the device on the last put we need 311 * a separate refcount. 312 */ 313 struct kref ref; 314 struct list_head entry; 315 struct mutex lock; 316 struct list_head ctrls; 317 struct list_head nsheads; 318 char subnqn[NVMF_NQN_SIZE]; 319 char serial[20]; 320 char model[40]; 321 char firmware_rev[8]; 322 u8 cmic; 323 u16 vendor_id; 324 u16 awupf; /* 0's based awupf value. */ 325 struct ida ns_ida; 326 #ifdef CONFIG_NVME_MULTIPATH 327 enum nvme_iopolicy iopolicy; 328 #endif 329 }; 330 331 /* 332 * Container structure for uniqueue namespace identifiers. 333 */ 334 struct nvme_ns_ids { 335 u8 eui64[8]; 336 u8 nguid[16]; 337 uuid_t uuid; 338 }; 339 340 /* 341 * Anchor structure for namespaces. There is one for each namespace in a 342 * NVMe subsystem that any of our controllers can see, and the namespace 343 * structure for each controller is chained of it. For private namespaces 344 * there is a 1:1 relation to our namespace structures, that is ->list 345 * only ever has a single entry for private namespaces. 346 */ 347 struct nvme_ns_head { 348 struct list_head list; 349 struct srcu_struct srcu; 350 struct nvme_subsystem *subsys; 351 unsigned ns_id; 352 struct nvme_ns_ids ids; 353 struct list_head entry; 354 struct kref ref; 355 int instance; 356 #ifdef CONFIG_NVME_MULTIPATH 357 struct gendisk *disk; 358 struct bio_list requeue_list; 359 spinlock_t requeue_lock; 360 struct work_struct requeue_work; 361 struct mutex lock; 362 struct nvme_ns __rcu *current_path[]; 363 #endif 364 }; 365 366 struct nvme_ns { 367 struct list_head list; 368 369 struct nvme_ctrl *ctrl; 370 struct request_queue *queue; 371 struct gendisk *disk; 372 #ifdef CONFIG_NVME_MULTIPATH 373 enum nvme_ana_state ana_state; 374 u32 ana_grpid; 375 #endif 376 struct list_head siblings; 377 struct nvm_dev *ndev; 378 struct kref kref; 379 struct nvme_ns_head *head; 380 381 int lba_shift; 382 u16 ms; 383 u16 sgs; 384 u32 sws; 385 bool ext; 386 u8 pi_type; 387 unsigned long flags; 388 #define NVME_NS_REMOVING 0 389 #define NVME_NS_DEAD 1 390 #define NVME_NS_ANA_PENDING 2 391 u16 noiob; 392 393 struct nvme_fault_inject fault_inject; 394 395 }; 396 397 struct nvme_ctrl_ops { 398 const char *name; 399 struct module *module; 400 unsigned int flags; 401 #define NVME_F_FABRICS (1 << 0) 402 #define NVME_F_METADATA_SUPPORTED (1 << 1) 403 #define NVME_F_PCI_P2PDMA (1 << 2) 404 int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val); 405 int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val); 406 int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val); 407 void (*free_ctrl)(struct nvme_ctrl *ctrl); 408 void (*submit_async_event)(struct nvme_ctrl *ctrl); 409 void (*delete_ctrl)(struct nvme_ctrl *ctrl); 410 int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size); 411 }; 412 413 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS 414 void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj, 415 const char *dev_name); 416 void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inject); 417 void nvme_should_fail(struct request *req); 418 #else 419 static inline void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj, 420 const char *dev_name) 421 { 422 } 423 static inline void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inj) 424 { 425 } 426 static inline void nvme_should_fail(struct request *req) {} 427 #endif 428 429 static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl) 430 { 431 if (!ctrl->subsystem) 432 return -ENOTTY; 433 return ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65); 434 } 435 436 /* 437 * Convert a 512B sector number to a device logical block number. 438 */ 439 static inline u64 nvme_sect_to_lba(struct nvme_ns *ns, sector_t sector) 440 { 441 return sector >> (ns->lba_shift - SECTOR_SHIFT); 442 } 443 444 /* 445 * Convert a device logical block number to a 512B sector number. 446 */ 447 static inline sector_t nvme_lba_to_sect(struct nvme_ns *ns, u64 lba) 448 { 449 return lba << (ns->lba_shift - SECTOR_SHIFT); 450 } 451 452 static inline void nvme_end_request(struct request *req, __le16 status, 453 union nvme_result result) 454 { 455 struct nvme_request *rq = nvme_req(req); 456 457 rq->status = le16_to_cpu(status) >> 1; 458 rq->result = result; 459 /* inject error when permitted by fault injection framework */ 460 nvme_should_fail(req); 461 blk_mq_complete_request(req); 462 } 463 464 static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl) 465 { 466 get_device(ctrl->device); 467 } 468 469 static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl) 470 { 471 put_device(ctrl->device); 472 } 473 474 static inline bool nvme_is_aen_req(u16 qid, __u16 command_id) 475 { 476 return !qid && command_id >= NVME_AQ_BLK_MQ_DEPTH; 477 } 478 479 void nvme_complete_rq(struct request *req); 480 bool nvme_cancel_request(struct request *req, void *data, bool reserved); 481 bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, 482 enum nvme_ctrl_state new_state); 483 bool nvme_wait_reset(struct nvme_ctrl *ctrl); 484 int nvme_disable_ctrl(struct nvme_ctrl *ctrl); 485 int nvme_enable_ctrl(struct nvme_ctrl *ctrl); 486 int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl); 487 int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, 488 const struct nvme_ctrl_ops *ops, unsigned long quirks); 489 void nvme_uninit_ctrl(struct nvme_ctrl *ctrl); 490 void nvme_start_ctrl(struct nvme_ctrl *ctrl); 491 void nvme_stop_ctrl(struct nvme_ctrl *ctrl); 492 void nvme_put_ctrl(struct nvme_ctrl *ctrl); 493 int nvme_init_identify(struct nvme_ctrl *ctrl); 494 495 void nvme_remove_namespaces(struct nvme_ctrl *ctrl); 496 497 int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len, 498 bool send); 499 500 void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status, 501 volatile union nvme_result *res); 502 503 void nvme_stop_queues(struct nvme_ctrl *ctrl); 504 void nvme_start_queues(struct nvme_ctrl *ctrl); 505 void nvme_kill_queues(struct nvme_ctrl *ctrl); 506 void nvme_sync_queues(struct nvme_ctrl *ctrl); 507 void nvme_unfreeze(struct nvme_ctrl *ctrl); 508 void nvme_wait_freeze(struct nvme_ctrl *ctrl); 509 void nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout); 510 void nvme_start_freeze(struct nvme_ctrl *ctrl); 511 512 #define NVME_QID_ANY -1 513 struct request *nvme_alloc_request(struct request_queue *q, 514 struct nvme_command *cmd, blk_mq_req_flags_t flags, int qid); 515 void nvme_cleanup_cmd(struct request *req); 516 blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req, 517 struct nvme_command *cmd); 518 int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, 519 void *buf, unsigned bufflen); 520 int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd, 521 union nvme_result *result, void *buffer, unsigned bufflen, 522 unsigned timeout, int qid, int at_head, 523 blk_mq_req_flags_t flags, bool poll); 524 int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid, 525 unsigned int dword11, void *buffer, size_t buflen, 526 u32 *result); 527 int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid, 528 unsigned int dword11, void *buffer, size_t buflen, 529 u32 *result); 530 int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count); 531 void nvme_stop_keep_alive(struct nvme_ctrl *ctrl); 532 int nvme_reset_ctrl(struct nvme_ctrl *ctrl); 533 int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl); 534 int nvme_try_sched_reset(struct nvme_ctrl *ctrl); 535 int nvme_delete_ctrl(struct nvme_ctrl *ctrl); 536 537 int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, 538 void *log, size_t size, u64 offset); 539 540 extern const struct attribute_group *nvme_ns_id_attr_groups[]; 541 extern const struct block_device_operations nvme_ns_head_ops; 542 543 #ifdef CONFIG_NVME_MULTIPATH 544 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl) 545 { 546 return ctrl->ana_log_buf != NULL; 547 } 548 549 void nvme_mpath_unfreeze(struct nvme_subsystem *subsys); 550 void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys); 551 void nvme_mpath_start_freeze(struct nvme_subsystem *subsys); 552 void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns, 553 struct nvme_ctrl *ctrl, int *flags); 554 bool nvme_failover_req(struct request *req); 555 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl); 556 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head); 557 void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id); 558 void nvme_mpath_remove_disk(struct nvme_ns_head *head); 559 int nvme_mpath_init(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id); 560 void nvme_mpath_uninit(struct nvme_ctrl *ctrl); 561 void nvme_mpath_stop(struct nvme_ctrl *ctrl); 562 bool nvme_mpath_clear_current_path(struct nvme_ns *ns); 563 void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl); 564 struct nvme_ns *nvme_find_path(struct nvme_ns_head *head); 565 566 static inline void nvme_mpath_check_last_path(struct nvme_ns *ns) 567 { 568 struct nvme_ns_head *head = ns->head; 569 570 if (head->disk && list_empty(&head->list)) 571 kblockd_schedule_work(&head->requeue_work); 572 } 573 574 static inline void nvme_trace_bio_complete(struct request *req, 575 blk_status_t status) 576 { 577 struct nvme_ns *ns = req->q->queuedata; 578 579 if (req->cmd_flags & REQ_NVME_MPATH) 580 trace_block_bio_complete(ns->head->disk->queue, 581 req->bio, status); 582 } 583 584 extern struct device_attribute dev_attr_ana_grpid; 585 extern struct device_attribute dev_attr_ana_state; 586 extern struct device_attribute subsys_attr_iopolicy; 587 588 #else 589 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl) 590 { 591 return false; 592 } 593 /* 594 * Without the multipath code enabled, multiple controller per subsystems are 595 * visible as devices and thus we cannot use the subsystem instance. 596 */ 597 static inline void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns, 598 struct nvme_ctrl *ctrl, int *flags) 599 { 600 sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->head->instance); 601 } 602 603 static inline bool nvme_failover_req(struct request *req) 604 { 605 return false; 606 } 607 static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl) 608 { 609 } 610 static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, 611 struct nvme_ns_head *head) 612 { 613 return 0; 614 } 615 static inline void nvme_mpath_add_disk(struct nvme_ns *ns, 616 struct nvme_id_ns *id) 617 { 618 } 619 static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head) 620 { 621 } 622 static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns) 623 { 624 return false; 625 } 626 static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl) 627 { 628 } 629 static inline void nvme_mpath_check_last_path(struct nvme_ns *ns) 630 { 631 } 632 static inline void nvme_trace_bio_complete(struct request *req, 633 blk_status_t status) 634 { 635 } 636 static inline int nvme_mpath_init(struct nvme_ctrl *ctrl, 637 struct nvme_id_ctrl *id) 638 { 639 if (ctrl->subsys->cmic & (1 << 3)) 640 dev_warn(ctrl->device, 641 "Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n"); 642 return 0; 643 } 644 static inline void nvme_mpath_uninit(struct nvme_ctrl *ctrl) 645 { 646 } 647 static inline void nvme_mpath_stop(struct nvme_ctrl *ctrl) 648 { 649 } 650 static inline void nvme_mpath_unfreeze(struct nvme_subsystem *subsys) 651 { 652 } 653 static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys) 654 { 655 } 656 static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys) 657 { 658 } 659 #endif /* CONFIG_NVME_MULTIPATH */ 660 661 #ifdef CONFIG_NVM 662 int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node); 663 void nvme_nvm_unregister(struct nvme_ns *ns); 664 extern const struct attribute_group nvme_nvm_attr_group; 665 int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, unsigned long arg); 666 #else 667 static inline int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, 668 int node) 669 { 670 return 0; 671 } 672 673 static inline void nvme_nvm_unregister(struct nvme_ns *ns) {}; 674 static inline int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, 675 unsigned long arg) 676 { 677 return -ENOTTY; 678 } 679 #endif /* CONFIG_NVM */ 680 681 static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev) 682 { 683 return dev_to_disk(dev)->private_data; 684 } 685 686 #ifdef CONFIG_NVME_HWMON 687 void nvme_hwmon_init(struct nvme_ctrl *ctrl); 688 #else 689 static inline void nvme_hwmon_init(struct nvme_ctrl *ctrl) { } 690 #endif 691 692 #endif /* _NVME_H */ 693