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                      pi_offset;
 468         u8                      guard_type;
 469         u16                     sgs;
 470         u32                     sws;
 471 #ifdef CONFIG_BLK_DEV_ZONED
 472         u64                     zsze;
 473 #endif
 474         unsigned long           features;
 475
 476         struct ratelimit_state  rs_nuse;
 477
 478         struct cdev             cdev;
 479         struct device           cdev_device;
 480
 481         struct gendisk          *disk;
 482 #ifdef CONFIG_NVME_MULTIPATH
 483         struct bio_list         requeue_list;
 484         spinlock_t              requeue_lock;
 485         struct work_struct      requeue_work;
 486         struct mutex            lock;
 487         unsigned long           flags;
 488 #define NVME_NSHEAD_DISK_LIVE   0
 489         struct nvme_ns __rcu    *current_path[];
 490 #endif
 491 };
 492
 493 static inline bool nvme_ns_head_multipath(struct nvme_ns_head *head)
 494 {
 495         return IS_ENABLED(CONFIG_NVME_MULTIPATH) && head->disk;
 496 }
 497
 498 enum nvme_ns_features {
 499         NVME_NS_EXT_LBAS = 1 << 0, /* support extended LBA format */
 500         NVME_NS_METADATA_SUPPORTED = 1 << 1, /* support getting generated md */
 501         NVME_NS_DEAC,           /* DEAC bit in Write Zeores supported */
 502 };
 503
 504 struct nvme_ns {
 505         struct list_head list;
 506
 507         struct nvme_ctrl *ctrl;
 508         struct request_queue *queue;
 509         struct gendisk *disk;
 510 #ifdef CONFIG_NVME_MULTIPATH
 511         enum nvme_ana_state ana_state;
 512         u32 ana_grpid;
 513 #endif
 514         struct list_head siblings;
 515         struct kref kref;
 516         struct nvme_ns_head *head;
 517
 518         unsigned long flags;
 519 #define NVME_NS_REMOVING        0
 520 #define NVME_NS_ANA_PENDING     2
 521 #define NVME_NS_FORCE_RO        3
 522 #define NVME_NS_READY           4
 523
 524         struct cdev             cdev;
 525         struct device           cdev_device;
 526
 527         struct nvme_fault_inject fault_inject;
 528 };
 529
 530 /* NVMe ns supports metadata actions by the controller (generate/strip) */
 531 static inline bool nvme_ns_has_pi(struct nvme_ns_head *head)
 532 {
 533         return head->pi_type && head->ms == head->pi_size;
 534 }
 535
 536 struct nvme_ctrl_ops {
 537         const char *name;
 538         struct module *module;
 539         unsigned int flags;
 540 #define NVME_F_FABRICS                  (1 << 0)
 541 #define NVME_F_METADATA_SUPPORTED       (1 << 1)
 542 #define NVME_F_BLOCKING                 (1 << 2)
 543
 544         const struct attribute_group **dev_attr_groups;
 545         int (*reg_read32)(struct nvme_ctrl *ctrl, u32 off, u32 *val);
 546         int (*reg_write32)(struct nvme_ctrl *ctrl, u32 off, u32 val);
 547         int (*reg_read64)(struct nvme_ctrl *ctrl, u32 off, u64 *val);
 548         void (*free_ctrl)(struct nvme_ctrl *ctrl);
 549         void (*submit_async_event)(struct nvme_ctrl *ctrl);
 550         void (*delete_ctrl)(struct nvme_ctrl *ctrl);
 551         void (*stop_ctrl)(struct nvme_ctrl *ctrl);
 552         int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);
 553         void (*print_device_info)(struct nvme_ctrl *ctrl);
 554         bool (*supports_pci_p2pdma)(struct nvme_ctrl *ctrl);
 555 };
 556
 557 /*
 558  * nvme command_id is constructed as such:
 559  * | xxxx | xxxxxxxxxxxx |
 560  *   gen    request tag
 561  */
 562 #define nvme_genctr_mask(gen)                   (gen & 0xf)
 563 #define nvme_cid_install_genctr(gen)            (nvme_genctr_mask(gen) << 12)
 564 #define nvme_genctr_from_cid(cid)               ((cid & 0xf000) >> 12)
 565 #define nvme_tag_from_cid(cid)                  (cid & 0xfff)
 566
 567 static inline u16 nvme_cid(struct request *rq)
 568 {
 569         return nvme_cid_install_genctr(nvme_req(rq)->genctr) | rq->tag;
 570 }
 571
 572 static inline struct request *nvme_find_rq(struct blk_mq_tags *tags,
 573                 u16 command_id)
 574 {
 575         u8 genctr = nvme_genctr_from_cid(command_id);
 576         u16 tag = nvme_tag_from_cid(command_id);
 577         struct request *rq;
 578
 579         rq = blk_mq_tag_to_rq(tags, tag);
 580         if (unlikely(!rq)) {
 581                 pr_err("could not locate request for tag %#x\n",
 582                         tag);
 583                 return NULL;
 584         }
 585         if (unlikely(nvme_genctr_mask(nvme_req(rq)->genctr) != genctr)) {
 586                 dev_err(nvme_req(rq)->ctrl->device,
 587                         "request %#x genctr mismatch (got %#x expected %#x)\n",
 588                         tag, genctr, nvme_genctr_mask(nvme_req(rq)->genctr));
 589                 return NULL;
 590         }
 591         return rq;
 592 }
 593
 594 static inline struct request *nvme_cid_to_rq(struct blk_mq_tags *tags,
 595                 u16 command_id)
 596 {
 597         return blk_mq_tag_to_rq(tags, nvme_tag_from_cid(command_id));
 598 }
 599
 600 /*
 601  * Return the length of the string without the space padding
 602  */
 603 static inline int nvme_strlen(char *s, int len)
 604 {
 605         while (s[len - 1] == ' ')
 606                 len--;
 607         return len;
 608 }
 609
 610 static inline void nvme_print_device_info(struct nvme_ctrl *ctrl)
 611 {
 612         struct nvme_subsystem *subsys = ctrl->subsys;
 613
 614         if (ctrl->ops->print_device_info) {
 615                 ctrl->ops->print_device_info(ctrl);
 616                 return;
 617         }
 618
 619         dev_err(ctrl->device,
 620                 "VID:%04x model:%.*s firmware:%.*s\n", subsys->vendor_id,
 621                 nvme_strlen(subsys->model, sizeof(subsys->model)),
 622                 subsys->model, nvme_strlen(subsys->firmware_rev,
 623                                            sizeof(subsys->firmware_rev)),
 624                 subsys->firmware_rev);
 625 }
 626
 627 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
 628 void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
 629                             const char *dev_name);
 630 void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inject);
 631 void nvme_should_fail(struct request *req);
 632 #else
 633 static inline void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
 634                                           const char *dev_name)
 635 {
 636 }
 637 static inline void nvme_fault_inject_fini(struct nvme_fault_inject *fault_inj)
 638 {
 639 }
 640 static inline void nvme_should_fail(struct request *req) {}
 641 #endif
 642
 643 bool nvme_wait_reset(struct nvme_ctrl *ctrl);
 644 int nvme_try_sched_reset(struct nvme_ctrl *ctrl);
 645
 646 static inline int nvme_reset_subsystem(struct nvme_ctrl *ctrl)
 647 {
 648         int ret;
 649
 650         if (!ctrl->subsystem)
 651                 return -ENOTTY;
 652         if (!nvme_wait_reset(ctrl))
 653                 return -EBUSY;
 654
 655         ret = ctrl->ops->reg_write32(ctrl, NVME_REG_NSSR, 0x4E564D65);
 656         if (ret)
 657                 return ret;
 658
 659         return nvme_try_sched_reset(ctrl);
 660 }
 661
 662 /*
 663  * Convert a 512B sector number to a device logical block number.
 664  */
 665 static inline u64 nvme_sect_to_lba(struct nvme_ns_head *head, sector_t sector)
 666 {
 667         return sector >> (head->lba_shift - SECTOR_SHIFT);
 668 }
 669
 670 /*
 671  * Convert a device logical block number to a 512B sector number.
 672  */
 673 static inline sector_t nvme_lba_to_sect(struct nvme_ns_head *head, u64 lba)
 674 {
 675         return lba << (head->lba_shift - SECTOR_SHIFT);
 676 }
 677
 678 /*
 679  * Convert byte length to nvme's 0-based num dwords
 680  */
 681 static inline u32 nvme_bytes_to_numd(size_t len)
 682 {
 683         return (len >> 2) - 1;
 684 }
 685
 686 static inline bool nvme_is_ana_error(u16 status)
 687 {
 688         switch (status & 0x7ff) {
 689         case NVME_SC_ANA_TRANSITION:
 690         case NVME_SC_ANA_INACCESSIBLE:
 691         case NVME_SC_ANA_PERSISTENT_LOSS:
 692                 return true;
 693         default:
 694                 return false;
 695         }
 696 }
 697
 698 static inline bool nvme_is_path_error(u16 status)
 699 {
 700         /* check for a status code type of 'path related status' */
 701         return (status & 0x700) == 0x300;
 702 }
 703
 704 /*
 705  * Fill in the status and result information from the CQE, and then figure out
 706  * if blk-mq will need to use IPI magic to complete the request, and if yes do
 707  * so.  If not let the caller complete the request without an indirect function
 708  * call.
 709  */
 710 static inline bool nvme_try_complete_req(struct request *req, __le16 status,
 711                 union nvme_result result)
 712 {
 713         struct nvme_request *rq = nvme_req(req);
 714         struct nvme_ctrl *ctrl = rq->ctrl;
 715
 716         if (!(ctrl->quirks & NVME_QUIRK_SKIP_CID_GEN))
 717                 rq->genctr++;
 718
 719         rq->status = le16_to_cpu(status) >> 1;
 720         rq->result = result;
 721         /* inject error when permitted by fault injection framework */
 722         nvme_should_fail(req);
 723         if (unlikely(blk_should_fake_timeout(req->q)))
 724                 return true;
 725         return blk_mq_complete_request_remote(req);
 726 }
 727
 728 static inline void nvme_get_ctrl(struct nvme_ctrl *ctrl)
 729 {
 730         get_device(ctrl->device);
 731 }
 732
 733 static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl)
 734 {
 735         put_device(ctrl->device);
 736 }
 737
 738 static inline bool nvme_is_aen_req(u16 qid, __u16 command_id)
 739 {
 740         return !qid &&
 741                 nvme_tag_from_cid(command_id) >= NVME_AQ_BLK_MQ_DEPTH;
 742 }
 743
 744 void nvme_complete_rq(struct request *req);
 745 void nvme_complete_batch_req(struct request *req);
 746
 747 static __always_inline void nvme_complete_batch(struct io_comp_batch *iob,
 748                                                 void (*fn)(struct request *rq))
 749 {
 750         struct request *req;
 751
 752         rq_list_for_each(&iob->req_list, req) {
 753                 fn(req);
 754                 nvme_complete_batch_req(req);
 755         }
 756         blk_mq_end_request_batch(iob);
 757 }
 758
 759 blk_status_t nvme_host_path_error(struct request *req);
 760 bool nvme_cancel_request(struct request *req, void *data);
 761 void nvme_cancel_tagset(struct nvme_ctrl *ctrl);
 762 void nvme_cancel_admin_tagset(struct nvme_ctrl *ctrl);
 763 bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
 764                 enum nvme_ctrl_state new_state);
 765 int nvme_disable_ctrl(struct nvme_ctrl *ctrl, bool shutdown);
 766 int nvme_enable_ctrl(struct nvme_ctrl *ctrl);
 767 int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
 768                 const struct nvme_ctrl_ops *ops, unsigned long quirks);
 769 void nvme_uninit_ctrl(struct nvme_ctrl *ctrl);
 770 void nvme_start_ctrl(struct nvme_ctrl *ctrl);
 771 void nvme_stop_ctrl(struct nvme_ctrl *ctrl);
 772 int nvme_init_ctrl_finish(struct nvme_ctrl *ctrl, bool was_suspended);
 773 int nvme_alloc_admin_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set,
 774                 const struct blk_mq_ops *ops, unsigned int cmd_size);
 775 void nvme_remove_admin_tag_set(struct nvme_ctrl *ctrl);
 776 int nvme_alloc_io_tag_set(struct nvme_ctrl *ctrl, struct blk_mq_tag_set *set,
 777                 const struct blk_mq_ops *ops, unsigned int nr_maps,
 778                 unsigned int cmd_size);
 779 void nvme_remove_io_tag_set(struct nvme_ctrl *ctrl);
 780
 781 void nvme_remove_namespaces(struct nvme_ctrl *ctrl);
 782
 783 void nvme_complete_async_event(struct nvme_ctrl *ctrl, __le16 status,
 784                 volatile union nvme_result *res);
 785
 786 void nvme_quiesce_io_queues(struct nvme_ctrl *ctrl);
 787 void nvme_unquiesce_io_queues(struct nvme_ctrl *ctrl);
 788 void nvme_quiesce_admin_queue(struct nvme_ctrl *ctrl);
 789 void nvme_unquiesce_admin_queue(struct nvme_ctrl *ctrl);
 790 void nvme_mark_namespaces_dead(struct nvme_ctrl *ctrl);
 791 void nvme_sync_queues(struct nvme_ctrl *ctrl);
 792 void nvme_sync_io_queues(struct nvme_ctrl *ctrl);
 793 void nvme_unfreeze(struct nvme_ctrl *ctrl);
 794 void nvme_wait_freeze(struct nvme_ctrl *ctrl);
 795 int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout);
 796 void nvme_start_freeze(struct nvme_ctrl *ctrl);
 797
 798 static inline enum req_op nvme_req_op(struct nvme_command *cmd)
 799 {
 800         return nvme_is_write(cmd) ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN;
 801 }
 802
 803 #define NVME_QID_ANY -1
 804 void nvme_init_request(struct request *req, struct nvme_command *cmd);
 805 void nvme_cleanup_cmd(struct request *req);
 806 blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req);
 807 blk_status_t nvme_fail_nonready_command(struct nvme_ctrl *ctrl,
 808                 struct request *req);
 809 bool __nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
 810                 bool queue_live, enum nvme_ctrl_state state);
 811
 812 static inline bool nvme_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
 813                 bool queue_live)
 814 {
 815         enum nvme_ctrl_state state = nvme_ctrl_state(ctrl);
 816
 817         if (likely(state == NVME_CTRL_LIVE))
 818                 return true;
 819         if (ctrl->ops->flags & NVME_F_FABRICS && state == NVME_CTRL_DELETING)
 820                 return queue_live;
 821         return __nvme_check_ready(ctrl, rq, queue_live, state);
 822 }
 823
 824 /*
 825  * NSID shall be unique for all shared namespaces, or if at least one of the
 826  * following conditions is met:
 827  *   1. Namespace Management is supported by the controller
 828  *   2. ANA is supported by the controller
 829  *   3. NVM Set are supported by the controller
 830  *
 831  * In other case, private namespace are not required to report a unique NSID.
 832  */
 833 static inline bool nvme_is_unique_nsid(struct nvme_ctrl *ctrl,
 834                 struct nvme_ns_head *head)
 835 {
 836         return head->shared ||
 837                 (ctrl->oacs & NVME_CTRL_OACS_NS_MNGT_SUPP) ||
 838                 (ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA) ||
 839                 (ctrl->ctratt & NVME_CTRL_CTRATT_NVM_SETS);
 840 }
 841
 842 /*
 843  * Flags for __nvme_submit_sync_cmd()
 844  */
 845 typedef __u32 __bitwise nvme_submit_flags_t;
 846
 847 enum {
 848         /* Insert request at the head of the queue */
 849         NVME_SUBMIT_AT_HEAD  = (__force nvme_submit_flags_t)(1 << 0),
 850         /* Set BLK_MQ_REQ_NOWAIT when allocating request */
 851         NVME_SUBMIT_NOWAIT = (__force nvme_submit_flags_t)(1 << 1),
 852         /* Set BLK_MQ_REQ_RESERVED when allocating request */
 853         NVME_SUBMIT_RESERVED = (__force nvme_submit_flags_t)(1 << 2),
 854         /* Retry command when NVME_SC_DNR is not set in the result */
 855         NVME_SUBMIT_RETRY = (__force nvme_submit_flags_t)(1 << 3),
 856 };
 857
 858 int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
 859                 void *buf, unsigned bufflen);
 860 int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
 861                 union nvme_result *result, void *buffer, unsigned bufflen,
 862                 int qid, nvme_submit_flags_t flags);
 863 int nvme_set_features(struct nvme_ctrl *dev, unsigned int fid,
 864                       unsigned int dword11, void *buffer, size_t buflen,
 865                       u32 *result);
 866 int nvme_get_features(struct nvme_ctrl *dev, unsigned int fid,
 867                       unsigned int dword11, void *buffer, size_t buflen,
 868                       u32 *result);
 869 int nvme_set_queue_count(struct nvme_ctrl *ctrl, int *count);
 870 void nvme_stop_keep_alive(struct nvme_ctrl *ctrl);
 871 int nvme_reset_ctrl(struct nvme_ctrl *ctrl);
 872 int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl);
 873 int nvme_delete_ctrl(struct nvme_ctrl *ctrl);
 874 void nvme_queue_scan(struct nvme_ctrl *ctrl);
 875 int nvme_get_log(struct nvme_ctrl *ctrl, u32 nsid, u8 log_page, u8 lsp, u8 csi,
 876                 void *log, size_t size, u64 offset);
 877 bool nvme_tryget_ns_head(struct nvme_ns_head *head);
 878 void nvme_put_ns_head(struct nvme_ns_head *head);
 879 int nvme_cdev_add(struct cdev *cdev, struct device *cdev_device,
 880                 const struct file_operations *fops, struct module *owner);
 881 void nvme_cdev_del(struct cdev *cdev, struct device *cdev_device);
 882 int nvme_ioctl(struct block_device *bdev, blk_mode_t mode,
 883                 unsigned int cmd, unsigned long arg);
 884 long nvme_ns_chr_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
 885 int nvme_ns_head_ioctl(struct block_device *bdev, blk_mode_t mode,
 886                 unsigned int cmd, unsigned long arg);
 887 long nvme_ns_head_chr_ioctl(struct file *file, unsigned int cmd,
 888                 unsigned long arg);
 889 long nvme_dev_ioctl(struct file *file, unsigned int cmd,
 890                 unsigned long arg);
 891 int nvme_ns_chr_uring_cmd_iopoll(struct io_uring_cmd *ioucmd,
 892                 struct io_comp_batch *iob, unsigned int poll_flags);
 893 int nvme_ns_chr_uring_cmd(struct io_uring_cmd *ioucmd,
 894                 unsigned int issue_flags);
 895 int nvme_ns_head_chr_uring_cmd(struct io_uring_cmd *ioucmd,
 896                 unsigned int issue_flags);
 897 int nvme_identify_ns(struct nvme_ctrl *ctrl, unsigned nsid,
 898                 struct nvme_id_ns **id);
 899 int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo);
 900 int nvme_dev_uring_cmd(struct io_uring_cmd *ioucmd, unsigned int issue_flags);
 901
 902 extern const struct attribute_group *nvme_ns_attr_groups[];
 903 extern const struct pr_ops nvme_pr_ops;
 904 extern const struct block_device_operations nvme_ns_head_ops;
 905 extern const struct attribute_group nvme_dev_attrs_group;
 906 extern const struct attribute_group *nvme_subsys_attrs_groups[];
 907 extern const struct attribute_group *nvme_dev_attr_groups[];
 908 extern const struct block_device_operations nvme_bdev_ops;
 909
 910 void nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl);
 911 struct nvme_ns *nvme_find_path(struct nvme_ns_head *head);
 912 #ifdef CONFIG_NVME_MULTIPATH
 913 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
 914 {
 915         return ctrl->ana_log_buf != NULL;
 916 }
 917
 918 void nvme_mpath_unfreeze(struct nvme_subsystem *subsys);
 919 void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
 920 void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
 921 void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys);
 922 void nvme_failover_req(struct request *req);
 923 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
 924 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
 925 void nvme_mpath_add_disk(struct nvme_ns *ns, __le32 anagrpid);
 926 void nvme_mpath_remove_disk(struct nvme_ns_head *head);
 927 int nvme_mpath_init_identify(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id);
 928 void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl);
 929 void nvme_mpath_update(struct nvme_ctrl *ctrl);
 930 void nvme_mpath_uninit(struct nvme_ctrl *ctrl);
 931 void nvme_mpath_stop(struct nvme_ctrl *ctrl);
 932 bool nvme_mpath_clear_current_path(struct nvme_ns *ns);
 933 void nvme_mpath_revalidate_paths(struct nvme_ns *ns);
 934 void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl);
 935 void nvme_mpath_shutdown_disk(struct nvme_ns_head *head);
 936 void nvme_mpath_start_request(struct request *rq);
 937 void nvme_mpath_end_request(struct request *rq);
 938
 939 static inline void nvme_trace_bio_complete(struct request *req)
 940 {
 941         struct nvme_ns *ns = req->q->queuedata;
 942
 943         if ((req->cmd_flags & REQ_NVME_MPATH) && req->bio)
 944                 trace_block_bio_complete(ns->head->disk->queue, req->bio);
 945 }
 946
 947 extern bool multipath;
 948 extern struct device_attribute dev_attr_ana_grpid;
 949 extern struct device_attribute dev_attr_ana_state;
 950 extern struct device_attribute subsys_attr_iopolicy;
 951
 952 static inline bool nvme_disk_is_ns_head(struct gendisk *disk)
 953 {
 954         return disk->fops == &nvme_ns_head_ops;
 955 }
 956 #else
 957 #define multipath false
 958 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
 959 {
 960         return false;
 961 }
 962 static inline void nvme_failover_req(struct request *req)
 963 {
 964 }
 965 static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
 966 {
 967 }
 968 static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,
 969                 struct nvme_ns_head *head)
 970 {
 971         return 0;
 972 }
 973 static inline void nvme_mpath_add_disk(struct nvme_ns *ns, __le32 anagrpid)
 974 {
 975 }
 976 static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head)
 977 {
 978 }
 979 static inline bool nvme_mpath_clear_current_path(struct nvme_ns *ns)
 980 {
 981         return false;
 982 }
 983 static inline void nvme_mpath_revalidate_paths(struct nvme_ns *ns)
 984 {
 985 }
 986 static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl)
 987 {
 988 }
 989 static inline void nvme_mpath_shutdown_disk(struct nvme_ns_head *head)
 990 {
 991 }
 992 static inline void nvme_trace_bio_complete(struct request *req)
 993 {
 994 }
 995 static inline void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl)
 996 {
 997 }
 998 static inline int nvme_mpath_init_identify(struct nvme_ctrl *ctrl,
 999                 struct nvme_id_ctrl *id)
1000 {
1001         if (ctrl->subsys->cmic & NVME_CTRL_CMIC_ANA)
1002                 dev_warn(ctrl->device,
1003 "Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n");
1004         return 0;
1005 }
1006 static inline void nvme_mpath_update(struct nvme_ctrl *ctrl)
1007 {
1008 }
1009 static inline void nvme_mpath_uninit(struct nvme_ctrl *ctrl)
1010 {
1011 }
1012 static inline void nvme_mpath_stop(struct nvme_ctrl *ctrl)
1013 {
1014 }
1015 static inline void nvme_mpath_unfreeze(struct nvme_subsystem *subsys)
1016 {
1017 }
1018 static inline void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys)
1019 {
1020 }
1021 static inline void nvme_mpath_start_freeze(struct nvme_subsystem *subsys)
1022 {
1023 }
1024 static inline void nvme_mpath_default_iopolicy(struct nvme_subsystem *subsys)
1025 {
1026 }
1027 static inline void nvme_mpath_start_request(struct request *rq)
1028 {
1029 }
1030 static inline void nvme_mpath_end_request(struct request *rq)
1031 {
1032 }
1033 static inline bool nvme_disk_is_ns_head(struct gendisk *disk)
1034 {
1035         return false;
1036 }
1037 #endif /* CONFIG_NVME_MULTIPATH */
1038
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 int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf,
1042                 struct queue_limits *lim);
1043 #ifdef CONFIG_BLK_DEV_ZONED
1044 blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns, struct request *req,
1045                                        struct nvme_command *cmnd,
1046                                        enum nvme_zone_mgmt_action action);
1047 #else
1048 static inline blk_status_t nvme_setup_zone_mgmt_send(struct nvme_ns *ns,
1049                 struct request *req, struct nvme_command *cmnd,
1050                 enum nvme_zone_mgmt_action action)
1051 {
1052         return BLK_STS_NOTSUPP;
1053 }
1054 #endif
1055
1056 static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)
1057 {
1058         struct gendisk *disk = dev_to_disk(dev);
1059
1060         WARN_ON(nvme_disk_is_ns_head(disk));
1061         return disk->private_data;
1062 }
1063
1064 #ifdef CONFIG_NVME_HWMON
1065 int nvme_hwmon_init(struct nvme_ctrl *ctrl);
1066 void nvme_hwmon_exit(struct nvme_ctrl *ctrl);
1067 #else
1068 static inline int nvme_hwmon_init(struct nvme_ctrl *ctrl)
1069 {
1070         return 0;
1071 }
1072
1073 static inline void nvme_hwmon_exit(struct nvme_ctrl *ctrl)
1074 {
1075 }
1076 #endif
1077
1078 static inline void nvme_start_request(struct request *rq)
1079 {
1080         if (rq->cmd_flags & REQ_NVME_MPATH)
1081                 nvme_mpath_start_request(rq);
1082         blk_mq_start_request(rq);
1083 }
1084
1085 static inline bool nvme_ctrl_sgl_supported(struct nvme_ctrl *ctrl)
1086 {
1087         return ctrl->sgls & ((1 << 0) | (1 << 1));
1088 }
1089
1090 #ifdef CONFIG_NVME_HOST_AUTH
1091 int __init nvme_init_auth(void);
1092 void __exit nvme_exit_auth(void);
1093 int nvme_auth_init_ctrl(struct nvme_ctrl *ctrl);
1094 void nvme_auth_stop(struct nvme_ctrl *ctrl);
1095 int nvme_auth_negotiate(struct nvme_ctrl *ctrl, int qid);
1096 int nvme_auth_wait(struct nvme_ctrl *ctrl, int qid);
1097 void nvme_auth_free(struct nvme_ctrl *ctrl);
1098 #else
1099 static inline int nvme_auth_init_ctrl(struct nvme_ctrl *ctrl)
1100 {
1101         return 0;
1102 }
1103 static inline int __init nvme_init_auth(void)
1104 {
1105         return 0;
1106 }
1107 static inline void __exit nvme_exit_auth(void)
1108 {
1109 }
1110 static inline void nvme_auth_stop(struct nvme_ctrl *ctrl) {};
1111 static inline int nvme_auth_negotiate(struct nvme_ctrl *ctrl, int qid)
1112 {
1113         return -EPROTONOSUPPORT;
1114 }
1115 static inline int nvme_auth_wait(struct nvme_ctrl *ctrl, int qid)
1116 {
1117         return NVME_SC_AUTH_REQUIRED;
1118 }
1119 static inline void nvme_auth_free(struct nvme_ctrl *ctrl) {};
1120 #endif
1121
1122 u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
1123                          u8 opcode);
1124 u32 nvme_passthru_start(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u8 opcode);
1125 int nvme_execute_rq(struct request *rq, bool at_head);
1126 void nvme_passthru_end(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u32 effects,
1127                        struct nvme_command *cmd, int status);
1128 struct nvme_ctrl *nvme_ctrl_from_file(struct file *file);
1129 struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid);
1130 void nvme_put_ns(struct nvme_ns *ns);
1131
1132 static inline bool nvme_multi_css(struct nvme_ctrl *ctrl)
1133 {
1134         return (ctrl->ctrl_config & NVME_CC_CSS_MASK) == NVME_CC_CSS_CSI;
1135 }
1136
1137 #ifdef CONFIG_NVME_VERBOSE_ERRORS
1138 const char *nvme_get_error_status_str(u16 status);
1139 const char *nvme_get_opcode_str(u8 opcode);
1140 const char *nvme_get_admin_opcode_str(u8 opcode);
1141 const char *nvme_get_fabrics_opcode_str(u8 opcode);
1142 #else /* CONFIG_NVME_VERBOSE_ERRORS */
1143 static inline const char *nvme_get_error_status_str(u16 status)
1144 {
1145         return "I/O Error";
1146 }
1147 static inline const char *nvme_get_opcode_str(u8 opcode)
1148 {
1149         return "I/O Cmd";
1150 }
1151 static inline const char *nvme_get_admin_opcode_str(u8 opcode)
1152 {
1153         return "Admin Cmd";
1154 }
1155
1156 static inline const char *nvme_get_fabrics_opcode_str(u8 opcode)
1157 {
1158         return "Fabrics Cmd";
1159 }
1160 #endif /* CONFIG_NVME_VERBOSE_ERRORS */
1161
1162 static inline const char *nvme_opcode_str(int qid, u8 opcode)
1163 {
1164         return qid ? nvme_get_opcode_str(opcode) :
1165                 nvme_get_admin_opcode_str(opcode);
1166 }
1167
1168 static inline const char *nvme_fabrics_opcode_str(
1169                 int qid, const struct nvme_command *cmd)
1170 {
1171         if (nvme_is_fabrics(cmd))
1172                 return nvme_get_fabrics_opcode_str(cmd->fabrics.fctype);
1173
1174         return nvme_opcode_str(qid, cmd->common.opcode);
1175 }
1176 #endif /* _NVME_H */