drivers/nvme/host/nvme.h

   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 #include <linux/ratelimit_types.h>
  20
  21 #include <trace/events/block.h>
  22
  23 extern const struct pr_ops nvme_pr_ops;
  24
  25 extern unsigned int nvme_io_timeout;
  26 #define NVME_IO_TIMEOUT (nvme_io_timeout * HZ)
  27
  28 extern unsigned int admin_timeout;
  29 #define NVME_ADMIN_TIMEOUT      (admin_timeout * HZ)
  30
  31 #define NVME_DEFAULT_KATO       5
  32
  33 #ifdef CONFIG_ARCH_NO_SG_CHAIN
  34 #define  NVME_INLINE_SG_CNT  0
  35 #define  NVME_INLINE_METADATA_SG_CNT  0
  36 #else
  37 #define  NVME_INLINE_SG_CNT  2
  38 #define  NVME_INLINE_METADATA_SG_CNT  1
  39 #endif
  40
  41 /*
  42  * Default to a 4K page size, with the intention to update this
  43  * path in the future to accommodate architectures with differing
  44  * kernel and IO page sizes.
  45  */
  46 #define NVME_CTRL_PAGE_SHIFT    12
  47 #define NVME_CTRL_PAGE_SIZE     (1 << NVME_CTRL_PAGE_SHIFT)
  48
  49 extern struct workqueue_struct *nvme_wq;
  50 extern struct workqueue_struct *nvme_reset_wq;
  51 extern struct workqueue_struct *nvme_delete_wq;
  52
  53 /*
  54  * List of workarounds for devices that required behavior not specified in
  55  * the standard.
  56  */
  57 enum nvme_quirks {
  58         /*
  59          * Prefers I/O aligned to a stripe size specified in a vendor
  60          * specific Identify field.
  61          */
  62         NVME_QUIRK_STRIPE_SIZE                  = (1 << 0),
  63
  64         /*
  65          * The controller doesn't handle Identify value others than 0 or 1
  66          * correctly.
  67          */
  68         NVME_QUIRK_IDENTIFY_CNS                 = (1 << 1),
  69
  70         /*
  71          * The controller deterministically returns O's on reads to
  72          * logical blocks that deallocate was called on.
  73          */
  74         NVME_QUIRK_DEALLOCATE_ZEROES            = (1 << 2),
  75
  76         /*
  77          * The controller needs a delay before starts checking the device
  78          * readiness, which is done by reading the NVME_CSTS_RDY bit.
  79          */
  80         NVME_QUIRK_DELAY_BEFORE_CHK_RDY         = (1 << 3),
  81
  82         /*
  83          * APST should not be used.
  84          */
  85         NVME_QUIRK_NO_APST                      = (1 << 4),
  86
  87         /*
  88          * The deepest sleep state should not be used.
  89          */
  90         NVME_QUIRK_NO_DEEPEST_PS                = (1 << 5),
  91
  92         /*
  93          * Set MEDIUM priority on SQ creation
  94          */
  95         NVME_QUIRK_MEDIUM_PRIO_SQ               = (1 << 7),
  96
  97         /*
  98          * Ignore device provided subnqn.
  99          */
 100         NVME_QUIRK_IGNORE_DEV_SUBNQN            = (1 << 8),
 101
 102         /*
 103          * Broken Write Zeroes.
 104          */
 105         NVME_QUIRK_DISABLE_WRITE_ZEROES         = (1 << 9),
 106
 107         /*
 108          * Force simple suspend/resume path.
 109          */
 110         NVME_QUIRK_SIMPLE_SUSPEND               = (1 << 10),
 111
 112         /*
 113          * Use only one interrupt vector for all queues
 114          */
 115         NVME_QUIRK_SINGLE_VECTOR                = (1 << 11),
 116
 117         /*
 118          * Use non-standard 128 bytes SQEs.
 119          */
 120         NVME_QUIRK_128_BYTES_SQES               = (1 << 12),
 121
 122         /*
 123          * Prevent tag overlap between queues
 124          */
 125         NVME_QUIRK_SHARED_TAGS                  = (1 << 13),
 126
 127         /*
 128          * Don't change the value of the temperature threshold feature
 129          */
 130         NVME_QUIRK_NO_TEMP_THRESH_CHANGE        = (1 << 14),
 131
 132         /*
 133          * The controller doesn't handle the Identify Namespace
 134          * Identification Descriptor list subcommand despite claiming
 135          * NVMe 1.3 compliance.
 136          */
 137         NVME_QUIRK_NO_NS_DESC_LIST              = (1 << 15),
 138
 139         /*
 140          * The controller does not properly handle DMA addresses over
 141          * 48 bits.
 142          */
 143         NVME_QUIRK_DMA_ADDRESS_BITS_48          = (1 << 16),
 144
 145         /*
 146          * The controller requires the command_id value be limited, so skip
 147          * encoding the generation sequence number.
 148          */
 149         NVME_QUIRK_SKIP_CID_GEN                 = (1 << 17),
 150
 151         /*
 152          * Reports garbage in the namespace identifiers (eui64, nguid, uuid).
 153          */
 154         NVME_QUIRK_BOGUS_NID                    = (1 << 18),
 155
 156         /*
 157          * No temperature thresholds for channels other than 0 (Composite).
 158          */
 159         NVME_QUIRK_NO_SECONDARY_TEMP_THRESH     = (1 << 19),
 160
 161         /*
 162          * Disables simple suspend/resume path.
 163          */
 164         NVME_QUIRK_FORCE_NO_SIMPLE_SUSPEND      = (1 << 20),
 165 };
 166
 167 /*
 168  * Common request structure for NVMe passthrough.  All drivers must have
 169  * this structure as the first member of their request-private data.
 170  */
 171 struct nvme_request {
 172         struct nvme_command     *cmd;
 173         union nvme_result       result;
 174         u8                      genctr;
 175         u8                      retries;
 176         u8                      flags;
 177         u16                     status;
 178 #ifdef CONFIG_NVME_MULTIPATH
 179         unsigned long           start_time;
 180 #endif
 181         struct nvme_ctrl        *ctrl;
 182 };
 183
 184 /*
 185  * Mark a bio as coming in through the mpath node.
 186  */
 187 #define REQ_NVME_MPATH          REQ_DRV
 188
 189 enum {
 190         NVME_REQ_CANCELLED              = (1 << 0),
 191         NVME_REQ_USERCMD                = (1 << 1),
 192         NVME_MPATH_IO_STATS             = (1 << 2),
 193 };
 194
 195 static inline struct nvme_request *nvme_req(struct request *req)
 196 {
 197         return blk_mq_rq_to_pdu(req);
 198 }
 199
 200 static inline u16 nvme_req_qid(struct request *req)
 201 {
 202         if (!req->q->queuedata)
 203                 return 0;
 204
 205         return req->mq_hctx->queue_num + 1;
 206 }
 207
 208 /* The below value is the specific amount of delay needed before checking
 209  * readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the
 210  * NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was
 211  * found empirically.
 212  */
 213 #define NVME_QUIRK_DELAY_AMOUNT         2300
 214
 215 /*
 216  * enum nvme_ctrl_state: Controller state
 217  *
 218  * @NVME_CTRL_NEW:              New controller just allocated, initial state
 219  * @NVME_CTRL_LIVE:             Controller is connected and I/O capable
 220  * @NVME_CTRL_RESETTING:        Controller is resetting (or scheduled reset)
 221  * @NVME_CTRL_CONNECTING:       Controller is disconnected, now connecting the
 222  *                              transport
 223  * @NVME_CTRL_DELETING:         Controller is deleting (or scheduled deletion)
 224  * @NVME_CTRL_DELETING_NOIO:    Controller is deleting and I/O is not
 225  *                              disabled/failed immediately. This state comes
 226  *                              after all async event processing took place and
 227  *                              before ns removal and the controller deletion
 228  *                              progress
 229  * @NVME_CTRL_DEAD:             Controller is non-present/unresponsive during
 230  *                              shutdown or removal. In this case we forcibly
 231  *                              kill all inflight I/O as they have no chance to
 232  *                              complete
 233  */
 234 enum nvme_ctrl_state {
 235         NVME_CTRL_NEW,
 236         NVME_CTRL_LIVE,
 237         NVME_CTRL_RESETTING,
 238         NVME_CTRL_CONNECTING,
 239         NVME_CTRL_DELETING,
 240         NVME_CTRL_DELETING_NOIO,
 241         NVME_CTRL_DEAD,
 242 };
 243
 244 struct nvme_fault_inject {
 245 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
 246         struct fault_attr attr;
 247         struct dentry *parent;
 248         bool dont_retry;        /* DNR, do not retry */
 249         u16 status;             /* status code */
 250 #endif
 251 };
 252
 253 enum nvme_ctrl_flags {
 254         NVME_CTRL_FAILFAST_EXPIRED      = 0,
 255         NVME_CTRL_ADMIN_Q_STOPPED       = 1,
 256         NVME_CTRL_STARTED_ONCE          = 2,
 257         NVME_CTRL_STOPPED               = 3,
 258         NVME_CTRL_SKIP_ID_CNS_CS        = 4,
 259         NVME_CTRL_DIRTY_CAPABILITY      = 5,
 260         NVME_CTRL_FROZEN                = 6,
 261 };
 262
 263 struct nvme_ctrl {
 264         bool comp_seen;
 265         bool identified;
 266         bool passthru_err_log_enabled;
 267         enum nvme_ctrl_state state;
 268         spinlock_t lock;
 269         struct mutex scan_lock;
 270         const struct nvme_ctrl_ops *ops;
 271         struct request_queue *admin_q;
 272         struct request_queue *connect_q;
 273         struct request_queue *fabrics_q;
 274         struct device *dev;
 275         int instance;
 276         int numa_node;
 277         struct blk_mq_tag_set *tagset;
 278         struct blk_mq_tag_set *admin_tagset;
 279         struct list_head namespaces;
 280         struct rw_semaphore namespaces_rwsem;
 281         struct device ctrl_device;
 282         struct device *device;  /* char device */
 283 #ifdef CONFIG_NVME_HWMON
 284         struct device *hwmon_device;
 285 #endif
 286         struct cdev cdev;
 287         struct work_struct reset_work;
 288         struct work_struct delete_work;
 289         wait_queue_head_t state_wq;
 290
 291         struct nvme_subsystem *subsys;
 292         struct list_head subsys_entry;
 293
 294         struct opal_dev *opal_dev;
 295
 296         char name[12];
 297         u16 cntlid;
 298
 299         u16 mtfa;
 300         u32 ctrl_config;
 301         u32 queue_count;
 302
 303         u64 cap;
 304         u32 max_hw_sectors;
 305         u32 max_segments;
 306         u32 max_integrity_segments;
 307         u32 max_zeroes_sectors;
 308 #ifdef CONFIG_BLK_DEV_ZONED
 309         u32 max_zone_append;
 310 #endif
 311         u16 crdt[3];
 312         u16 oncs;
 313         u8 dmrl;
 314         u32 dmrsl;
 315         u16 oacs;
 316         u16 sqsize;
 317         u32 max_namespaces;
 318         atomic_t abort_limit;
 319         u8 vwc;
 320         u32 vs;
 321         u32 sgls;
 322         u16 kas;
 323         u8 npss;
 324         u8 apsta;
 325         u16 wctemp;
 326         u16 cctemp;
 327         u32 oaes;
 328         u32 aen_result;
 329         u32 ctratt;
 330         unsigned int shutdown_timeout;
 331         unsigned int kato;
 332         bool subsystem;
 333         unsigned long quirks;
 334         struct nvme_id_power_state psd[32];
 335         struct nvme_effects_log *effects;
 336         struct xarray cels;
 337         struct work_struct scan_work;
 338         struct work_struct async_event_work;
 339         struct delayed_work ka_work;
 340         struct delayed_work failfast_work;
 341         struct nvme_command ka_cmd;
 342         unsigned long ka_last_check_time;
 343         struct work_struct fw_act_work;
 344         unsigned long events;
 345
 346 #ifdef CONFIG_NVME_MULTIPATH
 347         /* asymmetric namespace access: */
 348         u8 anacap;
 349         u8 anatt;
 350         u32 anagrpmax;
 351         u32 nanagrpid;
 352         struct mutex ana_lock;
 353         struct nvme_ana_rsp_hdr *ana_log_buf;
 354         size_t ana_log_size;
 355         struct timer_list anatt_timer;
 356         struct work_struct ana_work;
 357 #endif
 358
 359 #ifdef CONFIG_NVME_HOST_AUTH
 360         struct work_struct dhchap_auth_work;
 361         struct mutex dhchap_auth_mutex;
 362         struct nvme_dhchap_queue_context *dhchap_ctxs;
 363         struct nvme_dhchap_key *host_key;
 364         struct nvme_dhchap_key *ctrl_key;
 365         u16 transaction;
 366 #endif
 367         struct key *tls_key;
 368
 369         /* Power saving configuration */
 370         u64 ps_max_latency_us;
 371         bool apst_enabled;
 372
 373         /* PCIe only: */
 374         u16 hmmaxd;
 375         u32 hmpre;
 376         u32 hmmin;
 377         u32 hmminds;
 378
 379         /* Fabrics only */
 380         u32 ioccsz;
 381         u32 iorcsz;
 382         u16 icdoff;
 383         u16 maxcmd;
 384         int nr_reconnects;
 385         unsigned long flags;
 386         struct nvmf_ctrl_options *opts;
 387
 388         struct page *discard_page;
 389         unsigned long discard_page_busy;
 390
 391         struct nvme_fault_inject fault_inject;
 392
 393         enum nvme_ctrl_type cntrltype;
 394         enum nvme_dctype dctype;
 395 };
 396
 397 static inline enum nvme_ctrl_state nvme_ctrl_state(struct nvme_ctrl *ctrl)
 398 {
 399         return READ_ONCE(ctrl->state);
 400 }
 401
 402 enum nvme_iopolicy {
 403         NVME_IOPOLICY_NUMA,
 404         NVME_IOPOLICY_RR,
 405 };
 406
 407 struct nvme_subsystem {
 408         int                     instance;
 409         struct device           dev;
 410         /*
 411          * Because we unregister the device on the last put we need
 412          * a separate refcount.
 413          */
 414         struct kref             ref;
 415         struct list_head        entry;
 416         struct mutex            lock;
 417         struct list_head        ctrls;
 418         struct list_head        nsheads;
 419         char                    subnqn[NVMF_NQN_SIZE];
 420         char                    serial[20];
 421         char                    model[40];
 422         char                    firmware_rev[8];
 423         u8                      cmic;
 424         enum nvme_subsys_type   subtype;
 425         u16                     vendor_id;
 426         u16                     awupf;  /* 0's based awupf value. */
 427         struct ida              ns_ida;
 428 #ifdef CONFIG_NVME_MULTIPATH
 429         enum nvme_iopolicy      iopolicy;
 430 #endif
 431 };
 432
 433 /*
 434  * Container structure for uniqueue namespace identifiers.
 435  */
 436 struct nvme_ns_ids {
 437         u8      eui64[8];
 438         u8      nguid[16];
 439         uuid_t  uuid;
 440         u8      csi;
 441 };
 442
 443 /*
 444  * Anchor structure for namespaces.  There is one for each namespace in a
 445  * NVMe subsystem that any of our controllers can see, and the namespace
 446  * structure for each controller is chained of it.  For private namespaces
 447  * there is a 1:1 relation to our namespace structures, that is ->list
 448  * only ever has a single entry for private namespaces.
 449  */
 450 struct nvme_ns_head {
 451         struct list_head        list;
 452         struct srcu_struct      srcu;
 453         struct nvme_subsystem   *subsys;
 454         struct nvme_ns_ids      ids;
 455         struct list_head        entry;
 456         struct kref             ref;
 457         bool                    shared;
 458         bool                    passthru_err_log_enabled;
 459         int                     instance;
 460         struct nvme_effects_log *effects;
 461         u64                     nuse;
 462         unsigned                ns_id;
 463         int                     lba_shift;
 464         u16                     ms;
 465         u16                     pi_size;
 466         u8                      pi_type;
 467         u8                      guard_type;
 468         u16                     sgs;
 469         u32                     sws;
 470 #ifdef CONFIG_BLK_DEV_ZONED
 471         u64                     zsze;
 472 #endif
 473         unsigned long           features;
 474
 475         struct ratelimit_state  rs_nuse;
 476
 477         struct cdev             cdev;
 478         struct device           cdev_device;
 479
 480         struct gendisk          *disk;
 481 #ifdef CONFIG_NVME_MULTIPATH
 482         struct bio_list         requeue_list;
 483         spinlock_t              requeue_lock;
 484         struct work_struct      requeue_work;
 485         struct mutex            lock;
 486         unsigned long           flags;
 487 #define NVME_NSHEAD_DISK_LIVE   0
 488         struct nvme_ns __rcu    *current_path[];
 489 #endif
 490 };
 491
 492 static inline bool nvme_ns_head_multipath(struct nvme_ns_head *head)
 493 {
 494         return IS_ENABLED(CONFIG_NVME_MULTIPATH) && head->disk;
 495 }
 496
 497 enum nvme_ns_features {
 498         NVME_NS_EXT_LBAS = 1 << 0, /* support extended LBA format */
 499         NVME_NS_METADATA_SUPPORTED = 1 << 1, /* support getting generated md */
 500         NVME_NS_DEAC,           /* DEAC bit in Write Zeores supported */
 501 };
 502
 503 struct nvme_ns {
 504         struct list_head list;
 505
 506         struct nvme_ctrl *ctrl;
 507         struct request_queue *queue;
 508         struct gendisk *disk;
 509 #ifdef CONFIG_NVME_MULTIPATH
 510         enum nvme_ana_state ana_state;
 511         u32 ana_grpid;
 512 #endif
 513         struct list_head siblings;
 514         struct kref kref;
 515         struct nvme_ns_head *head;
 516
 517         unsigned long flags;
 518 #define NVME_NS_REMOVING        0
 519 #define NVME_NS_ANA_PENDING     2
 520 #define NVME_NS_FORCE_RO        3
 521 #define NVME_NS_READY           4
 522
 523         struct cdev             cdev;
 524         struct device           cdev_device;
 525
 526         struct nvme_fault_inject fault_inject;
 527 };
 528
 529 /* NVMe ns supports metadata actions by the controller (generate/strip) */
 530 static inline bool nvme_ns_has_pi(struct nvme_ns_head *head)
 531 {
 532         return head->pi_type && head->ms == head->pi_size;
 533 }
 534
 535 struct nvme_ctrl_ops {
 536         const char *name;
 537         struct module *module;
 538         unsigned int flags;
 539 #define NVME_F_FABRICS                  (1 << 0)
 540 #define NVME_F_METADATA_SUPPORTED       (1 << 1)
 541 #define NVME_F_BLOCKING                 (1 << 2)
 542
 543         const struct attribute_group **dev_attr_groups;
 544         int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
 545         int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val);
 546         int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val);
 547         void (*free_ctrl)(struct nvme_ctrl *ctrl);
 548         void (*submit_async_event)(struct nvme_ctrl *ctrl);
 549         void (*delete_ctrl)(struct nvme_ctrl *ctrl);
 550         void (*stop_ctrl)(struct nvme_ctrl *ctrl);
 551         int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);
 552         void (*print_device_info)(struct nvme_ctrl *ctrl);
 553         bool (*supports_pci_p2pdma)(struct nvme_ctrl *ctrl);
 554 };
 555
 556 /*
 557  * nvme command_id is constructed as such:
 558  * | xxxx | xxxxxxxxxxxx |
 559  *   gen    request tag
 560  */
 561 #define nvme_genctr_mask(gen)                   (gen & 0xf)
 562 #define nvme_cid_install_genctr(gen)            (nvme_genctr_mask(gen) << 12)
 563 #define nvme_genctr_from_cid(cid)               ((cid & 0xf000) >> 12)
 564 #define nvme_tag_from_cid(cid)                  (cid & 0xfff)
 565
 566 static inline u16 nvme_cid(struct request *rq)
 567 {
 568         return nvme_cid_install_genctr(nvme_req(rq)->genctr) | rq->tag;
 569 }
 570
 571 static inline struct request *nvme_find_rq(struct blk_mq_tags *tags,
 572                 u16 command_id)
 573 {
 574         u8 genctr = nvme_genctr_from_cid(command_id);
 575         u16 tag = nvme_tag_from_cid(command_id);
 576         struct request *rq;
 577
 578         rq = blk_mq_tag_to_rq(tags, tag);
 579         if (unlikely(!rq)) {
 580                 pr_err("could not locate request for tag %#x\n",
 581                         tag);
 582                 return NULL;
 583         }
 584         if (unlikely(nvme_genctr_mask(nvme_req(rq)->genctr) != genctr)) {
 585                 dev_err(nvme_req(rq)->ctrl->device,
 586                         "request %#x genctr mismatch (got %#x expected %#x)\n",
 587                         tag, genctr, nvme_genctr_mask(nvme_req(rq)->genctr));
 588                 return NULL;
 589         }
 590         return rq;
 591 }
 592
 593 static inline struct request *nvme_cid_to_rq(struct blk_mq_tags *tags,
 594                 u16 command_id)
 595 {
 596         return blk_mq_tag_to_rq(tags, nvme_tag_from_cid(command_id));
 597 }
 598
 599 /*
 600  * Return the length of the string without the space padding
 601  */
 602 static inline int nvme_strlen(char *s, int len)
 603 {
 604         while (s[len - 1] == ' ')
 605                 len--;
 606         return len;
 607 }
 608
 609 static inline void nvme_print_device_info(struct nvme_ctrl *ctrl)
 610 {
 611         struct nvme_subsystem *subsys = ctrl->subsys;
 612
 613         if (ctrl->ops->print_device_info) {
 614                 ctrl->ops->print_device_info(ctrl);
 615                 return;
 616         }
 617
 618         dev_err(ctrl->device,
 619                 "VID:%04x model:%.*s firmware:%.*s\n", subsys->vendor_id,
 620                 nvme_strlen(subsys->model, sizeof(subsys->model)),
 621                 subsys->model, nvme_strlen(subsys->firmware_rev,
 622                                            sizeof(subsys->firmware_rev)),
 623                 subsys->firmware_rev);
 624 }
 625
 626 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
 627 void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
 628                             const char *dev_name);
 629 void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inject);
 630 void nvme_should_fail(struct request *req);
 631 #else
 632 static inline void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
 633                                           const char *dev_name)
 634 {
 635 }
 636 static inline void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inj)
 637 {
 638 }
 639 static inline void nvme_should_fail(struct request *req) {}
 640 #endif
 641
 642 bool nvme_wait_reset(struct nvme_ctrl *ctrl);
 643 int nvme_try_sched_reset(struct nvme_ctrl *ctrl);
 644
 645 static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl)
 646 {
 647         int ret;
 648
 649         if (!ctrl->subsystem)
 650                 return -ENOTTY;
 651         if (!nvme_wait_reset(ctrl))
 652                 return -EBUSY;
 653
 654         ret = ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65);
 655         if (ret)
 656                 return ret;
 657
 658         return nvme_try_sched_reset(ctrl);
 659 }
 660
 661 /*
 662  * Convert a 512B sector number to a device logical block number.
 663  */
 664 static inline u64 nvme_sect_to_lba(struct nvme_ns_head *head, sector_t sector)
 665 {
 666         return sector >> (head->lba_shift - SECTOR_SHIFT);
 667 }
 668
 669 /*
 670  * Convert a device logical block number to a 512B sector number.
 671  */
 672 static inline sector_t nvme_lba_to_sect(struct nvme_ns_head *head, u64 lba)
 673 {
 674         return lba << (head->lba_shift - SECTOR_SHIFT);
 675 }
 676
 677 /*
 678  * Convert byte length to nvme's 0-based num dwords
 679  */
 680 static inline u32 nvme_bytes_to_numd(size_t len)
 681 {
 682         return (len >> 2) - 1;
 683 }
 684
 685 static inline bool nvme_is_ana_error(u16 status)
 686 {
 687         switch (status & 0x7ff) {
 688         case NVME_SC_ANA_TRANSITION:
 689         case NVME_SC_ANA_INACCESSIBLE:
 690         case NVME_SC_ANA_PERSISTENT_LOSS:
 691                 return true;
 692         default:
 693                 return false;
 694         }
 695 }
 696
 697 static inline bool nvme_is_path_error(u16 status)
 698 {
 699         /* check for a status code type of 'path related status' */
 700         return (status & 0x700) == 0x300;
 701 }
 702
 703 /*
 704  * Fill in the status and result information from the CQE, and then figure out
 705  * if blk-mq will need to use IPI magic to complete the request, and if yes do
 706  * so.  If not let the caller complete the request without an indirect function
 707  * call.
 708  */
 709 static inline bool nvme_try_complete_req(struct request *req, __le16 status,
 710                 union nvme_result result)
 711 {
 712         struct nvme_request *rq = nvme_req(req);
 713         struct nvme_ctrl *ctrl = rq->ctrl;
 714
 715         if (!(ctrl->quirks & NVME_QUIRK_SKIP_CID_GEN))
 716                 rq->genctr++;
 717
 718         rq->status = le16_to_cpu(status) >> 1;
 719         rq->result = result;
 720         /* inject error when permitted by fault injection framework */
 721         nvme_should_fail(req);
 722         if (unlikely(blk_should_fake_timeout(req->q)))
 723                 return true;
 724         return blk_mq_complete_request_remote(req);
 725 }
 726
 727 static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl)
 728 {
 729         get_device(ctrl->device);
 730 }
 731
 732 static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl)
 733 {
 734         put_device(ctrl->device);
 735 }
 736
 737 static inline bool nvme_is_aen_req(u16 qid, __u16 command_id)
 738 {
 739         return !qid &&
 740                 nvme_tag_from_cid(command_id) >= NVME_AQ_BLK_MQ_DEPTH;
 741 }
 742
 743 void nvme_complete_rq(struct request *req);
 744 void nvme_complete_batch_req(struct request *req);
 745
 746 static __always_inline void nvme_complete_batch(struct io_comp_batch *iob,
 747                                                 void (*fn)(struct request *rq))
 748 {
 749         struct request *req;
 750
 751         rq_list_for_each(&iob->req_list, req) {
 752                 fn(req);
 753                 nvme_complete_batch_req(req);
 754         }
 755         blk_mq_end_request_batch(iob);
 756 }
 757
 758 blk_status_t nvme_host_path_error(struct request *req);
 759 bool nvme_cancel_request(struct request *req, void *data);
 760 void nvme_cancel_tagset(struct nvme_ctrl *ctrl);
 761 void nvme_cancel_admin_tagset(struct nvme_ctrl *ctrl);
 762 bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
 763                 enum nvme_ctrl_state new_state);
 764 int nvme_disable_ctrl(struct nvme_ctrl *ctrl, bool shutdown);
 765 int nvme_enable_ctrl(struct nvme_ctrl *ctrl);
 766 int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
 767                 const struct nvme_ctrl_ops *ops, unsigned long quirks);
 768 void nvme_uninit_ctrl(struct nvme_ctrl *ctrl);
 769 void nvme_start_ctrl(struct nvme_ctrl *ctrl);
 770 void nvme_stop_ctrl(struct nvme_ctrl *ctrl);
 771 int nvme_init_ctrl_finish(struct nvme_ctrl *ctrl, bool was_suspended);
 772 int nvme_alloc_admin_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set,
 773                 const struct blk_mq_ops *ops, unsigned int cmd_size);
 774 void nvme_remove_admin_tag_set(struct nvme_ctrl *ctrl);
 775 int nvme_alloc_io_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set,
 776                 const struct blk_mq_ops *ops, unsigned int nr_maps,
 777                 unsigned int cmd_size);
 778 void nvme_remove_io_tag_set(struct nvme_ctrl *ctrl);
 779
 780 void nvme_remove_namespaces(struct nvme_ctrl *ctrl);
 781
 782 void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
 783                 volatile union nvme_result *res);
 784
 785 void nvme_quiesce_io_queues(struct nvme_ctrl *ctrl);
 786 void nvme_unquiesce_io_queues(struct nvme_ctrl *ctrl);
 787 void nvme_quiesce_admin_queue(struct nvme_ctrl *ctrl);
 788 void nvme_unquiesce_admin_queue(struct nvme_ctrl *ctrl);
 789 void nvme_mark_namespaces_dead(struct nvme_ctrl *ctrl);
 790 void nvme_sync_queues(struct nvme_ctrl *ctrl);
 791 void nvme_sync_io_queues(struct nvme_ctrl *ctrl);
 792 void nvme_unfreeze(struct nvme_ctrl *ctrl);
 793 void nvme_wait_freeze(struct nvme_ctrl *ctrl);
 794 int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout);
 795 void nvme_start_freeze(struct nvme_ctrl *ctrl);
 796
 797 static inline enum req_op nvme_req_op(struct nvme_command *cmd)
 798 {
 799         return nvme_is_write(cmd) ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN;
 800 }
 801
 802 #define NVME_QID_ANY -1
 803 void nvme_init_request(struct request *req, struct nvme_command *cmd);
 804 void nvme_cleanup_cmd(struct request *req);
 805 blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req);
 806 blk_status_t nvme_fail_nonready_command(struct nvme_ctrl *ctrl,
 807                 struct request *req);
 808 bool __nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
 809                 bool queue_live, enum nvme_ctrl_state state);
 810
 811 static inline bool nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
 812                 bool queue_live)
 813 {
 814         enum nvme_ctrl_state state = nvme_ctrl_state(ctrl);
 815
 816         if (likely(state == NVME_CTRL_LIVE))
 817                 return true;
 818         if (ctrl->ops->flags & NVME_F_FABRICS && state == NVME_CTRL_DELETING)
 819                 return queue_live;
 820         return __nvme_check_ready(ctrl, rq, queue_live, state);
 821 }
 822
 823 /*
 824  * NSID shall be unique for all shared namespaces, or if at least one of the
 825  * following conditions is met:
 826  *   1. Namespace Management is supported by the controller
 827  *   2. ANA is supported by the controller
 828  *   3. NVM Set are supported by the controller
 829  *
 830  * In other case, private namespace are not required to report a unique NSID.
 831  */
 832 static inline bool nvme_is_unique_nsid(struct nvme_ctrl *ctrl,
 833                 struct nvme_ns_head *head)
 834 {
 835         return head->shared ||
 836                 (ctrl->oacs & NVME_CTRL_OACS_NS_MNGT_SUPP) ||
 837                 (ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA) ||
 838                 (ctrl->ctratt & NVME_CTRL_CTRATT_NVM_SETS);
 839 }
 840
 841 /*
 842  * Flags for __nvme_submit_sync_cmd()
 843  */
 844 typedef __u32 __bitwise nvme_submit_flags_t;
 845
 846 enum {
 847         /* Insert request at the head of the queue */
 848         NVME_SUBMIT_AT_HEAD  = (__force nvme_submit_flags_t)(1 << 0),
 849         /* Set BLK_MQ_REQ_NOWAIT when allocating request */
 850         NVME_SUBMIT_NOWAIT = (__force nvme_submit_flags_t)(1 << 1),
 851         /* Set BLK_MQ_REQ_RESERVED when allocating request */
 852         NVME_SUBMIT_RESERVED = (__force nvme_submit_flags_t)(1 << 2),
 853         /* Retry command when NVME_SC_DNR is not set in the result */
 854         NVME_SUBMIT_RETRY = (__force nvme_submit_flags_t)(1 << 3),
 855 };
 856
 857 int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
 858                 void *buf, unsigned bufflen);
 859 int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
 860                 union nvme_result *result, void *buffer, unsigned bufflen,
 861                 int qid, nvme_submit_flags_t flags);
 862 int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid,
 863                       unsigned int dword11, void *buffer, size_t buflen,
 864                       u32 *result);
 865 int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid,
 866                       unsigned int dword11, void *buffer, size_t buflen,
 867                       u32 *result);
 868 int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);
 869 void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);
 870 int nvme_reset_ctrl(struct nvme_ctrl *ctrl);
 871 int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl);
 872 int nvme_delete_ctrl(struct nvme_ctrl *ctrl);
 873 void nvme_queue_scan(struct nvme_ctrl *ctrl);
 874 int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi,
 875                 void *log, size_t size, u64 offset);
 876 bool nvme_tryget_ns_head(struct nvme_ns_head *head);
 877 void nvme_put_ns_head(struct nvme_ns_head *head);
 878 int nvme_cdev_add(struct cdev *cdev, struct device *cdev_device,
 879                 const struct file_operations *fops, struct module *owner);
 880 void nvme_cdev_del(struct cdev *cdev, struct device *cdev_device);
 881 int nvme_ioctl(struct block_device *bdev, blk_mode_t mode,
 882                 unsigned int cmd, unsigned long arg);
 883 long nvme_ns_chr_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
 884 int nvme_ns_head_ioctl(struct block_device *bdev, blk_mode_t mode,
 885                 unsigned int cmd, unsigned long arg);
 886 long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd,
 887                 unsigned long arg);
 888 long nvme_dev_ioctl(struct file *file, unsigned int cmd,
 889                 unsigned long arg);
 890 int nvme_ns_chr_uring_cmd_iopoll(struct io_uring_cmd *ioucmd,
 891                 struct io_comp_batch *iob, unsigned int poll_flags);
 892 int nvme_ns_chr_uring_cmd(struct io_uring_cmd *ioucmd,
 893                 unsigned int issue_flags);
 894 int nvme_ns_head_chr_uring_cmd(struct io_uring_cmd *ioucmd,
 895                 unsigned int issue_flags);
 896 int nvme_identify_ns(struct nvme_ctrl *ctrl, unsigned nsid,
 897                 struct nvme_id_ns **id);
 898 int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo);
 899 int nvme_dev_uring_cmd(struct io_uring_cmd *ioucmd, unsigned int issue_flags);
 900
 901 extern const struct attribute_group *nvme_ns_attr_groups[];
 902 extern const struct pr_ops nvme_pr_ops;
 903 extern const struct block_device_operations nvme_ns_head_ops;
 904 extern const struct attribute_group nvme_dev_attrs_group;
 905 extern const struct attribute_group *nvme_subsys_attrs_groups[];
 906 extern const struct attribute_group *nvme_dev_attr_groups[];
 907 extern const struct block_device_operations nvme_bdev_ops;
 908
 909 void nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl);
 910 struct nvme_ns *nvme_find_path(struct nvme_ns_head *head);
 911 #ifdef CONFIG_NVME_MULTIPATH
 912 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
 913 {
 914         return ctrl->ana_log_buf != NULL;
 915 }
 916
 917 void nvme_mpath_unfreeze(struct nvme_subsystem *subsys);
 918 void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
 919 void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
 920 void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys);
 921 void nvme_failover_req(struct request *req);
 922 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
 923 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
 924 void nvme_mpath_add_disk(struct nvme_ns *ns, __le32 anagrpid);
 925 void nvme_mpath_remove_disk(struct nvme_ns_head *head);
 926 int nvme_mpath_init_identify(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id);
 927 void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl);
 928 void nvme_mpath_update(struct nvme_ctrl *ctrl);
 929 void nvme_mpath_uninit(struct nvme_ctrl *ctrl);
 930 void nvme_mpath_stop(struct nvme_ctrl *ctrl);
 931 bool nvme_mpath_clear_current_path(struct nvme_ns *ns);
 932 void nvme_mpath_revalidate_paths(struct nvme_ns *ns);
 933 void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl);
 934 void nvme_mpath_shutdown_disk(struct nvme_ns_head *head);
 935 void nvme_mpath_start_request(struct request *rq);
 936 void nvme_mpath_end_request(struct request *rq);
 937
 938 static inline void nvme_trace_bio_complete(struct request *req)
 939 {
 940         struct nvme_ns *ns = req->q->queuedata;
 941
 942         if ((req->cmd_flags & REQ_NVME_MPATH) && req->bio)
 943                 trace_block_bio_complete(ns->head->disk->queue, req->bio);
 944 }
 945
 946 extern bool multipath;
 947 extern struct device_attribute dev_attr_ana_grpid;
 948 extern struct device_attribute dev_attr_ana_state;
 949 extern struct device_attribute subsys_attr_iopolicy;
 950
 951 static inline bool nvme_disk_is_ns_head(struct gendisk *disk)
 952 {
 953         return disk->fops == &nvme_ns_head_ops;
 954 }
 955 #else
 956 #define multipath false
 957 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
 958 {
 959         return false;
 960 }
 961 static inline void nvme_failover_req(struct request *req)
 962 {
 963 }
 964 static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
 965 {
 966 }
 967 static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,
 968                 struct nvme_ns_head *head)
 969 {
 970         return 0;
 971 }
 972 static inline void nvme_mpath_add_disk(struct nvme_ns *ns, __le32 anagrpid)
 973 {
 974 }
 975 static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head)
 976 {
 977 }
 978 static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns)
 979 {
 980         return false;
 981 }
 982 static inline void nvme_mpath_revalidate_paths(struct nvme_ns *ns)
 983 {
 984 }
 985 static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl)
 986 {
 987 }
 988 static inline void nvme_mpath_shutdown_disk(struct nvme_ns_head *head)
 989 {
 990 }
 991 static inline void nvme_trace_bio_complete(struct request *req)
 992 {
 993 }
 994 static inline void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl)
 995 {
 996 }
 997 static inline int nvme_mpath_init_identify(struct nvme_ctrl *ctrl,
 998                 struct nvme_id_ctrl *id)
 999 {
1000         if (ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA)
1001                 dev_warn(ctrl->device,
1002 "Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n");
1003         return 0;
1004 }
1005 static inline void nvme_mpath_update(struct nvme_ctrl *ctrl)
1006 {
1007 }
1008 static inline void nvme_mpath_uninit(struct nvme_ctrl *ctrl)
1009 {
1010 }
1011 static inline void nvme_mpath_stop(struct nvme_ctrl *ctrl)
1012 {
1013 }
1014 static inline void nvme_mpath_unfreeze(struct nvme_subsystem *subsys)
1015 {
1016 }
1017 static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys)
1018 {
1019 }
1020 static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)
1021 {
1022 }
1023 static inline void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys)
1024 {
1025 }
1026 static inline void nvme_mpath_start_request(struct request *rq)
1027 {
1028 }
1029 static inline void nvme_mpath_end_request(struct request *rq)
1030 {
1031 }
1032 static inline bool nvme_disk_is_ns_head(struct gendisk *disk)
1033 {
1034         return false;
1035 }
1036 #endif /* CONFIG_NVME_MULTIPATH */
1037
1038 int nvme_revalidate_zones(struct nvme_ns *ns);
1039 int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector,
1040                 unsigned int nr_zones, report_zones_cb cb, void *data);
1041 #ifdef CONFIG_BLK_DEV_ZONED
1042 int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf);
1043 blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req,
1044                                        struct nvme_command *cmnd,
1045                                        enum nvme_zone_mgmt_action action);
1046 #else
1047 static inline blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns,
1048                 struct request *req, struct nvme_command *cmnd,
1049                 enum nvme_zone_mgmt_action action)
1050 {
1051         return BLK_STS_NOTSUPP;
1052 }
1053
1054 static inline int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf)
1055 {
1056         dev_warn(ns->ctrl->device,
1057                  "Please enable CONFIG_BLK_DEV_ZONED to support ZNS devices\n");
1058         return -EPROTONOSUPPORT;
1059 }
1060 #endif
1061
1062 static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)
1063 {
1064         struct gendisk *disk = dev_to_disk(dev);
1065
1066         WARN_ON(nvme_disk_is_ns_head(disk));
1067         return disk->private_data;
1068 }
1069
1070 #ifdef CONFIG_NVME_HWMON
1071 int nvme_hwmon_init(struct nvme_ctrl *ctrl);
1072 void nvme_hwmon_exit(struct nvme_ctrl *ctrl);
1073 #else
1074 static inline int nvme_hwmon_init(struct nvme_ctrl *ctrl)
1075 {
1076         return 0;
1077 }
1078
1079 static inline void nvme_hwmon_exit(struct nvme_ctrl *ctrl)
1080 {
1081 }
1082 #endif
1083
1084 static inline void nvme_start_request(struct request *rq)
1085 {
1086         if (rq->cmd_flags & REQ_NVME_MPATH)
1087                 nvme_mpath_start_request(rq);
1088         blk_mq_start_request(rq);
1089 }
1090
1091 static inline bool nvme_ctrl_sgl_supported(struct nvme_ctrl *ctrl)
1092 {
1093         return ctrl->sgls & ((1 << 0) | (1 << 1));
1094 }
1095
1096 #ifdef CONFIG_NVME_HOST_AUTH
1097 int __init nvme_init_auth(void);
1098 void __exit nvme_exit_auth(void);
1099 int nvme_auth_init_ctrl(struct nvme_ctrl *ctrl);
1100 void nvme_auth_stop(struct nvme_ctrl *ctrl);
1101 int nvme_auth_negotiate(struct nvme_ctrl *ctrl, int qid);
1102 int nvme_auth_wait(struct nvme_ctrl *ctrl, int qid);
1103 void nvme_auth_free(struct nvme_ctrl *ctrl);
1104 #else
1105 static inline int nvme_auth_init_ctrl(struct nvme_ctrl *ctrl)
1106 {
1107         return 0;
1108 }
1109 static inline int __init nvme_init_auth(void)
1110 {
1111         return 0;
1112 }
1113 static inline void __exit nvme_exit_auth(void)
1114 {
1115 }
1116 static inline void nvme_auth_stop(struct nvme_ctrl *ctrl) {};
1117 static inline int nvme_auth_negotiate(struct nvme_ctrl *ctrl, int qid)
1118 {
1119         return -EPROTONOSUPPORT;
1120 }
1121 static inline int nvme_auth_wait(struct nvme_ctrl *ctrl, int qid)
1122 {
1123         return NVME_SC_AUTH_REQUIRED;
1124 }
1125 static inline void nvme_auth_free(struct nvme_ctrl *ctrl) {};
1126 #endif
1127
1128 u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
1129                          u8 opcode);
1130 u32 nvme_passthru_start(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u8 opcode);
1131 int nvme_execute_rq(struct request *rq, bool at_head);
1132 void nvme_passthru_end(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u32 effects,
1133                        struct nvme_command *cmd, int status);
1134 struct nvme_ctrl *nvme_ctrl_from_file(struct file *file);
1135 struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid);
1136 void nvme_put_ns(struct nvme_ns *ns);
1137
1138 static inline bool nvme_multi_css(struct nvme_ctrl *ctrl)
1139 {
1140         return (ctrl->ctrl_config & NVME_CC_CSS_MASK) == NVME_CC_CSS_CSI;
1141 }
1142
1143 #ifdef CONFIG_NVME_VERBOSE_ERRORS
1144 const char *nvme_get_error_status_str(u16 status);
1145 const char *nvme_get_opcode_str(u8 opcode);
1146 const char *nvme_get_admin_opcode_str(u8 opcode);
1147 const char *nvme_get_fabrics_opcode_str(u8 opcode);
1148 #else /* CONFIG_NVME_VERBOSE_ERRORS */
1149 static inline const char *nvme_get_error_status_str(u16 status)
1150 {
1151         return "I/O Error";
1152 }
1153 static inline const char *nvme_get_opcode_str(u8 opcode)
1154 {
1155         return "I/O Cmd";
1156 }
1157 static inline const char *nvme_get_admin_opcode_str(u8 opcode)
1158 {
1159         return "Admin Cmd";
1160 }
1161
1162 static inline const char *nvme_get_fabrics_opcode_str(u8 opcode)
1163 {
1164         return "Fabrics Cmd";
1165 }
1166 #endif /* CONFIG_NVME_VERBOSE_ERRORS */
1167
1168 static inline const char *nvme_opcode_str(int qid, u8 opcode)
1169 {
1170         return qid ? nvme_get_opcode_str(opcode) :
1171                 nvme_get_admin_opcode_str(opcode);
1172 }
1173
1174 static inline const char *nvme_fabrics_opcode_str(
1175                 int qid, const struct nvme_command *cmd)
1176 {
1177         if (nvme_is_fabrics(cmd))
1178                 return nvme_get_fabrics_opcode_str(cmd->fabrics.fctype);
1179
1180         return nvme_opcode_str(qid, cmd->common.opcode);
1181 }
1182 #endif /* _NVME_H */