include/linux/nvme.h

   1 /*
   2  * Definitions for the NVM Express interface
   3  * Copyright (c) 2011-2014, Intel Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  */
  14
  15 #ifndef _LINUX_NVME_H
  16 #define _LINUX_NVME_H
  17
  18 struct nvme_bar {
  19         __u64                   cap;    /* Controller Capabilities */
  20         __u32                   vs;     /* Version */
  21         __u32                   intms;  /* Interrupt Mask Set */
  22         __u32                   intmc;  /* Interrupt Mask Clear */
  23         __u32                   cc;     /* Controller Configuration */
  24         __u32                   rsvd1;  /* Reserved */
  25         __u32                   csts;   /* Controller Status */
  26         __u32                   nssr;   /* Subsystem Reset */
  27         __u32                   aqa;    /* Admin Queue Attributes */
  28         __u64                   asq;    /* Admin SQ Base Address */
  29         __u64                   acq;    /* Admin CQ Base Address */
  30         __u32                   cmbloc; /* Controller Memory Buffer Location */
  31         __u32                   cmbsz;  /* Controller Memory Buffer Size */
  32 };
  33
  34 #define NVME_CAP_MQES(cap)      ((cap) & 0xffff)
  35 #define NVME_CAP_TIMEOUT(cap)   (((cap) >> 24) & 0xff)
  36 #define NVME_CAP_STRIDE(cap)    (((cap) >> 32) & 0xf)
  37 #define NVME_CAP_NSSRC(cap)     (((cap) >> 36) & 0x1)
  38 #define NVME_CAP_MPSMIN(cap)    (((cap) >> 48) & 0xf)
  39 #define NVME_CAP_MPSMAX(cap)    (((cap) >> 52) & 0xf)
  40
  41 #define NVME_CMB_BIR(cmbloc)    ((cmbloc) & 0x7)
  42 #define NVME_CMB_OFST(cmbloc)   (((cmbloc) >> 12) & 0xfffff)
  43 #define NVME_CMB_SZ(cmbsz)      (((cmbsz) >> 12) & 0xfffff)
  44 #define NVME_CMB_SZU(cmbsz)     (((cmbsz) >> 8) & 0xf)
  45
  46 #define NVME_CMB_WDS(cmbsz)     ((cmbsz) & 0x10)
  47 #define NVME_CMB_RDS(cmbsz)     ((cmbsz) & 0x8)
  48 #define NVME_CMB_LISTS(cmbsz)   ((cmbsz) & 0x4)
  49 #define NVME_CMB_CQS(cmbsz)     ((cmbsz) & 0x2)
  50 #define NVME_CMB_SQS(cmbsz)     ((cmbsz) & 0x1)
  51
  52 enum {
  53         NVME_CC_ENABLE          = 1 << 0,
  54         NVME_CC_CSS_NVM         = 0 << 4,
  55         NVME_CC_MPS_SHIFT       = 7,
  56         NVME_CC_ARB_RR          = 0 << 11,
  57         NVME_CC_ARB_WRRU        = 1 << 11,
  58         NVME_CC_ARB_VS          = 7 << 11,
  59         NVME_CC_SHN_NONE        = 0 << 14,
  60         NVME_CC_SHN_NORMAL      = 1 << 14,
  61         NVME_CC_SHN_ABRUPT      = 2 << 14,
  62         NVME_CC_SHN_MASK        = 3 << 14,
  63         NVME_CC_IOSQES          = 6 << 16,
  64         NVME_CC_IOCQES          = 4 << 20,
  65         NVME_CSTS_RDY           = 1 << 0,
  66         NVME_CSTS_CFS           = 1 << 1,
  67         NVME_CSTS_NSSRO         = 1 << 4,
  68         NVME_CSTS_SHST_NORMAL   = 0 << 2,
  69         NVME_CSTS_SHST_OCCUR    = 1 << 2,
  70         NVME_CSTS_SHST_CMPLT    = 2 << 2,
  71         NVME_CSTS_SHST_MASK     = 3 << 2,
  72 };
  73
  74 struct nvme_id_power_state {
  75         __le16                  max_power;      /* centiwatts */
  76         __u8                    rsvd2;
  77         __u8                    flags;
  78         __le32                  entry_lat;      /* microseconds */
  79         __le32                  exit_lat;       /* microseconds */
  80         __u8                    read_tput;
  81         __u8                    read_lat;
  82         __u8                    write_tput;
  83         __u8                    write_lat;
  84         __le16                  idle_power;
  85         __u8                    idle_scale;
  86         __u8                    rsvd19;
  87         __le16                  active_power;
  88         __u8                    active_work_scale;
  89         __u8                    rsvd23[9];
  90 };
  91
  92 enum {
  93         NVME_PS_FLAGS_MAX_POWER_SCALE   = 1 << 0,
  94         NVME_PS_FLAGS_NON_OP_STATE      = 1 << 1,
  95 };
  96
  97 struct nvme_id_ctrl {
  98         __le16                  vid;
  99         __le16                  ssvid;
 100         char                    sn[20];
 101         char                    mn[40];
 102         char                    fr[8];
 103         __u8                    rab;
 104         __u8                    ieee[3];
 105         __u8                    mic;
 106         __u8                    mdts;
 107         __u16                   cntlid;
 108         __u32                   ver;
 109         __u8                    rsvd84[172];
 110         __le16                  oacs;
 111         __u8                    acl;
 112         __u8                    aerl;
 113         __u8                    frmw;
 114         __u8                    lpa;
 115         __u8                    elpe;
 116         __u8                    npss;
 117         __u8                    avscc;
 118         __u8                    apsta;
 119         __le16                  wctemp;
 120         __le16                  cctemp;
 121         __u8                    rsvd270[242];
 122         __u8                    sqes;
 123         __u8                    cqes;
 124         __u8                    rsvd514[2];
 125         __le32                  nn;
 126         __le16                  oncs;
 127         __le16                  fuses;
 128         __u8                    fna;
 129         __u8                    vwc;
 130         __le16                  awun;
 131         __le16                  awupf;
 132         __u8                    nvscc;
 133         __u8                    rsvd531;
 134         __le16                  acwu;
 135         __u8                    rsvd534[2];
 136         __le32                  sgls;
 137         __u8                    rsvd540[1508];
 138         struct nvme_id_power_state      psd[32];
 139         __u8                    vs[1024];
 140 };
 141
 142 enum {
 143         NVME_CTRL_ONCS_COMPARE                  = 1 << 0,
 144         NVME_CTRL_ONCS_WRITE_UNCORRECTABLE      = 1 << 1,
 145         NVME_CTRL_ONCS_DSM                      = 1 << 2,
 146         NVME_CTRL_VWC_PRESENT                   = 1 << 0,
 147 };
 148
 149 struct nvme_lbaf {
 150         __le16                  ms;
 151         __u8                    ds;
 152         __u8                    rp;
 153 };
 154
 155 struct nvme_id_ns {
 156         __le64                  nsze;
 157         __le64                  ncap;
 158         __le64                  nuse;
 159         __u8                    nsfeat;
 160         __u8                    nlbaf;
 161         __u8                    flbas;
 162         __u8                    mc;
 163         __u8                    dpc;
 164         __u8                    dps;
 165         __u8                    nmic;
 166         __u8                    rescap;
 167         __u8                    fpi;
 168         __u8                    rsvd33;
 169         __le16                  nawun;
 170         __le16                  nawupf;
 171         __le16                  nacwu;
 172         __le16                  nabsn;
 173         __le16                  nabo;
 174         __le16                  nabspf;
 175         __u16                   rsvd46;
 176         __le64                  nvmcap[2];
 177         __u8                    rsvd64[40];
 178         __u8                    nguid[16];
 179         __u8                    eui64[8];
 180         struct nvme_lbaf        lbaf[16];
 181         __u8                    rsvd192[192];
 182         __u8                    vs[3712];
 183 };
 184
 185 enum {
 186         NVME_NS_FEAT_THIN       = 1 << 0,
 187         NVME_NS_FLBAS_LBA_MASK  = 0xf,
 188         NVME_NS_FLBAS_META_EXT  = 0x10,
 189         NVME_LBAF_RP_BEST       = 0,
 190         NVME_LBAF_RP_BETTER     = 1,
 191         NVME_LBAF_RP_GOOD       = 2,
 192         NVME_LBAF_RP_DEGRADED   = 3,
 193         NVME_NS_DPC_PI_LAST     = 1 << 4,
 194         NVME_NS_DPC_PI_FIRST    = 1 << 3,
 195         NVME_NS_DPC_PI_TYPE3    = 1 << 2,
 196         NVME_NS_DPC_PI_TYPE2    = 1 << 1,
 197         NVME_NS_DPC_PI_TYPE1    = 1 << 0,
 198         NVME_NS_DPS_PI_FIRST    = 1 << 3,
 199         NVME_NS_DPS_PI_MASK     = 0x7,
 200         NVME_NS_DPS_PI_TYPE1    = 1,
 201         NVME_NS_DPS_PI_TYPE2    = 2,
 202         NVME_NS_DPS_PI_TYPE3    = 3,
 203 };
 204
 205 struct nvme_smart_log {
 206         __u8                    critical_warning;
 207         __u8                    temperature[2];
 208         __u8                    avail_spare;
 209         __u8                    spare_thresh;
 210         __u8                    percent_used;
 211         __u8                    rsvd6[26];
 212         __u8                    data_units_read[16];
 213         __u8                    data_units_written[16];
 214         __u8                    host_reads[16];
 215         __u8                    host_writes[16];
 216         __u8                    ctrl_busy_time[16];
 217         __u8                    power_cycles[16];
 218         __u8                    power_on_hours[16];
 219         __u8                    unsafe_shutdowns[16];
 220         __u8                    media_errors[16];
 221         __u8                    num_err_log_entries[16];
 222         __le32                  warning_temp_time;
 223         __le32                  critical_comp_time;
 224         __le16                  temp_sensor[8];
 225         __u8                    rsvd216[296];
 226 };
 227
 228 enum {
 229         NVME_SMART_CRIT_SPARE           = 1 << 0,
 230         NVME_SMART_CRIT_TEMPERATURE     = 1 << 1,
 231         NVME_SMART_CRIT_RELIABILITY     = 1 << 2,
 232         NVME_SMART_CRIT_MEDIA           = 1 << 3,
 233         NVME_SMART_CRIT_VOLATILE_MEMORY = 1 << 4,
 234 };
 235
 236 enum {
 237         NVME_AER_NOTICE_NS_CHANGED      = 0x0002,
 238 };
 239
 240 struct nvme_lba_range_type {
 241         __u8                    type;
 242         __u8                    attributes;
 243         __u8                    rsvd2[14];
 244         __u64                   slba;
 245         __u64                   nlb;
 246         __u8                    guid[16];
 247         __u8                    rsvd48[16];
 248 };
 249
 250 enum {
 251         NVME_LBART_TYPE_FS      = 0x01,
 252         NVME_LBART_TYPE_RAID    = 0x02,
 253         NVME_LBART_TYPE_CACHE   = 0x03,
 254         NVME_LBART_TYPE_SWAP    = 0x04,
 255
 256         NVME_LBART_ATTRIB_TEMP  = 1 << 0,
 257         NVME_LBART_ATTRIB_HIDE  = 1 << 1,
 258 };
 259
 260 struct nvme_reservation_status {
 261         __le32  gen;
 262         __u8    rtype;
 263         __u8    regctl[2];
 264         __u8    resv5[2];
 265         __u8    ptpls;
 266         __u8    resv10[13];
 267         struct {
 268                 __le16  cntlid;
 269                 __u8    rcsts;
 270                 __u8    resv3[5];
 271                 __le64  hostid;
 272                 __le64  rkey;
 273         } regctl_ds[];
 274 };
 275
 276 /* I/O commands */
 277
 278 enum nvme_opcode {
 279         nvme_cmd_flush          = 0x00,
 280         nvme_cmd_write          = 0x01,
 281         nvme_cmd_read           = 0x02,
 282         nvme_cmd_write_uncor    = 0x04,
 283         nvme_cmd_compare        = 0x05,
 284         nvme_cmd_write_zeroes   = 0x08,
 285         nvme_cmd_dsm            = 0x09,
 286         nvme_cmd_resv_register  = 0x0d,
 287         nvme_cmd_resv_report    = 0x0e,
 288         nvme_cmd_resv_acquire   = 0x11,
 289         nvme_cmd_resv_release   = 0x15,
 290 };
 291
 292 struct nvme_common_command {
 293         __u8                    opcode;
 294         __u8                    flags;
 295         __u16                   command_id;
 296         __le32                  nsid;
 297         __le32                  cdw2[2];
 298         __le64                  metadata;
 299         __le64                  prp1;
 300         __le64                  prp2;
 301         __le32                  cdw10[6];
 302 };
 303
 304 struct nvme_rw_command {
 305         __u8                    opcode;
 306         __u8                    flags;
 307         __u16                   command_id;
 308         __le32                  nsid;
 309         __u64                   rsvd2;
 310         __le64                  metadata;
 311         __le64                  prp1;
 312         __le64                  prp2;
 313         __le64                  slba;
 314         __le16                  length;
 315         __le16                  control;
 316         __le32                  dsmgmt;
 317         __le32                  reftag;
 318         __le16                  apptag;
 319         __le16                  appmask;
 320 };
 321
 322 enum {
 323         NVME_RW_LR                      = 1 << 15,
 324         NVME_RW_FUA                     = 1 << 14,
 325         NVME_RW_DSM_FREQ_UNSPEC         = 0,
 326         NVME_RW_DSM_FREQ_TYPICAL        = 1,
 327         NVME_RW_DSM_FREQ_RARE           = 2,
 328         NVME_RW_DSM_FREQ_READS          = 3,
 329         NVME_RW_DSM_FREQ_WRITES         = 4,
 330         NVME_RW_DSM_FREQ_RW             = 5,
 331         NVME_RW_DSM_FREQ_ONCE           = 6,
 332         NVME_RW_DSM_FREQ_PREFETCH       = 7,
 333         NVME_RW_DSM_FREQ_TEMP           = 8,
 334         NVME_RW_DSM_LATENCY_NONE        = 0 << 4,
 335         NVME_RW_DSM_LATENCY_IDLE        = 1 << 4,
 336         NVME_RW_DSM_LATENCY_NORM        = 2 << 4,
 337         NVME_RW_DSM_LATENCY_LOW         = 3 << 4,
 338         NVME_RW_DSM_SEQ_REQ             = 1 << 6,
 339         NVME_RW_DSM_COMPRESSED          = 1 << 7,
 340         NVME_RW_PRINFO_PRCHK_REF        = 1 << 10,
 341         NVME_RW_PRINFO_PRCHK_APP        = 1 << 11,
 342         NVME_RW_PRINFO_PRCHK_GUARD      = 1 << 12,
 343         NVME_RW_PRINFO_PRACT            = 1 << 13,
 344 };
 345
 346 struct nvme_dsm_cmd {
 347         __u8                    opcode;
 348         __u8                    flags;
 349         __u16                   command_id;
 350         __le32                  nsid;
 351         __u64                   rsvd2[2];
 352         __le64                  prp1;
 353         __le64                  prp2;
 354         __le32                  nr;
 355         __le32                  attributes;
 356         __u32                   rsvd12[4];
 357 };
 358
 359 enum {
 360         NVME_DSMGMT_IDR         = 1 << 0,
 361         NVME_DSMGMT_IDW         = 1 << 1,
 362         NVME_DSMGMT_AD          = 1 << 2,
 363 };
 364
 365 struct nvme_dsm_range {
 366         __le32                  cattr;
 367         __le32                  nlb;
 368         __le64                  slba;
 369 };
 370
 371 /* Admin commands */
 372
 373 enum nvme_admin_opcode {
 374         nvme_admin_delete_sq            = 0x00,
 375         nvme_admin_create_sq            = 0x01,
 376         nvme_admin_get_log_page         = 0x02,
 377         nvme_admin_delete_cq            = 0x04,
 378         nvme_admin_create_cq            = 0x05,
 379         nvme_admin_identify             = 0x06,
 380         nvme_admin_abort_cmd            = 0x08,
 381         nvme_admin_set_features         = 0x09,
 382         nvme_admin_get_features         = 0x0a,
 383         nvme_admin_async_event          = 0x0c,
 384         nvme_admin_activate_fw          = 0x10,
 385         nvme_admin_download_fw          = 0x11,
 386         nvme_admin_format_nvm           = 0x80,
 387         nvme_admin_security_send        = 0x81,
 388         nvme_admin_security_recv        = 0x82,
 389 };
 390
 391 enum {
 392         NVME_QUEUE_PHYS_CONTIG  = (1 << 0),
 393         NVME_CQ_IRQ_ENABLED     = (1 << 1),
 394         NVME_SQ_PRIO_URGENT     = (0 << 1),
 395         NVME_SQ_PRIO_HIGH       = (1 << 1),
 396         NVME_SQ_PRIO_MEDIUM     = (2 << 1),
 397         NVME_SQ_PRIO_LOW        = (3 << 1),
 398         NVME_FEAT_ARBITRATION   = 0x01,
 399         NVME_FEAT_POWER_MGMT    = 0x02,
 400         NVME_FEAT_LBA_RANGE     = 0x03,
 401         NVME_FEAT_TEMP_THRESH   = 0x04,
 402         NVME_FEAT_ERR_RECOVERY  = 0x05,
 403         NVME_FEAT_VOLATILE_WC   = 0x06,
 404         NVME_FEAT_NUM_QUEUES    = 0x07,
 405         NVME_FEAT_IRQ_COALESCE  = 0x08,
 406         NVME_FEAT_IRQ_CONFIG    = 0x09,
 407         NVME_FEAT_WRITE_ATOMIC  = 0x0a,
 408         NVME_FEAT_ASYNC_EVENT   = 0x0b,
 409         NVME_FEAT_AUTO_PST      = 0x0c,
 410         NVME_FEAT_SW_PROGRESS   = 0x80,
 411         NVME_FEAT_HOST_ID       = 0x81,
 412         NVME_FEAT_RESV_MASK     = 0x82,
 413         NVME_FEAT_RESV_PERSIST  = 0x83,
 414         NVME_LOG_ERROR          = 0x01,
 415         NVME_LOG_SMART          = 0x02,
 416         NVME_LOG_FW_SLOT        = 0x03,
 417         NVME_LOG_RESERVATION    = 0x80,
 418         NVME_FWACT_REPL         = (0 << 3),
 419         NVME_FWACT_REPL_ACTV    = (1 << 3),
 420         NVME_FWACT_ACTV         = (2 << 3),
 421 };
 422
 423 struct nvme_identify {
 424         __u8                    opcode;
 425         __u8                    flags;
 426         __u16                   command_id;
 427         __le32                  nsid;
 428         __u64                   rsvd2[2];
 429         __le64                  prp1;
 430         __le64                  prp2;
 431         __le32                  cns;
 432         __u32                   rsvd11[5];
 433 };
 434
 435 struct nvme_features {
 436         __u8                    opcode;
 437         __u8                    flags;
 438         __u16                   command_id;
 439         __le32                  nsid;
 440         __u64                   rsvd2[2];
 441         __le64                  prp1;
 442         __le64                  prp2;
 443         __le32                  fid;
 444         __le32                  dword11;
 445         __u32                   rsvd12[4];
 446 };
 447
 448 struct nvme_create_cq {
 449         __u8                    opcode;
 450         __u8                    flags;
 451         __u16                   command_id;
 452         __u32                   rsvd1[5];
 453         __le64                  prp1;
 454         __u64                   rsvd8;
 455         __le16                  cqid;
 456         __le16                  qsize;
 457         __le16                  cq_flags;
 458         __le16                  irq_vector;
 459         __u32                   rsvd12[4];
 460 };
 461
 462 struct nvme_create_sq {
 463         __u8                    opcode;
 464         __u8                    flags;
 465         __u16                   command_id;
 466         __u32                   rsvd1[5];
 467         __le64                  prp1;
 468         __u64                   rsvd8;
 469         __le16                  sqid;
 470         __le16                  qsize;
 471         __le16                  sq_flags;
 472         __le16                  cqid;
 473         __u32                   rsvd12[4];
 474 };
 475
 476 struct nvme_delete_queue {
 477         __u8                    opcode;
 478         __u8                    flags;
 479         __u16                   command_id;
 480         __u32                   rsvd1[9];
 481         __le16                  qid;
 482         __u16                   rsvd10;
 483         __u32                   rsvd11[5];
 484 };
 485
 486 struct nvme_abort_cmd {
 487         __u8                    opcode;
 488         __u8                    flags;
 489         __u16                   command_id;
 490         __u32                   rsvd1[9];
 491         __le16                  sqid;
 492         __u16                   cid;
 493         __u32                   rsvd11[5];
 494 };
 495
 496 struct nvme_download_firmware {
 497         __u8                    opcode;
 498         __u8                    flags;
 499         __u16                   command_id;
 500         __u32                   rsvd1[5];
 501         __le64                  prp1;
 502         __le64                  prp2;
 503         __le32                  numd;
 504         __le32                  offset;
 505         __u32                   rsvd12[4];
 506 };
 507
 508 struct nvme_format_cmd {
 509         __u8                    opcode;
 510         __u8                    flags;
 511         __u16                   command_id;
 512         __le32                  nsid;
 513         __u64                   rsvd2[4];
 514         __le32                  cdw10;
 515         __u32                   rsvd11[5];
 516 };
 517
 518 struct nvme_command {
 519         union {
 520                 struct nvme_common_command common;
 521                 struct nvme_rw_command rw;
 522                 struct nvme_identify identify;
 523                 struct nvme_features features;
 524                 struct nvme_create_cq create_cq;
 525                 struct nvme_create_sq create_sq;
 526                 struct nvme_delete_queue delete_queue;
 527                 struct nvme_download_firmware dlfw;
 528                 struct nvme_format_cmd format;
 529                 struct nvme_dsm_cmd dsm;
 530                 struct nvme_abort_cmd abort;
 531         };
 532 };
 533
 534 enum {
 535         NVME_SC_SUCCESS                 = 0x0,
 536         NVME_SC_INVALID_OPCODE          = 0x1,
 537         NVME_SC_INVALID_FIELD           = 0x2,
 538         NVME_SC_CMDID_CONFLICT          = 0x3,
 539         NVME_SC_DATA_XFER_ERROR         = 0x4,
 540         NVME_SC_POWER_LOSS              = 0x5,
 541         NVME_SC_INTERNAL                = 0x6,
 542         NVME_SC_ABORT_REQ               = 0x7,
 543         NVME_SC_ABORT_QUEUE             = 0x8,
 544         NVME_SC_FUSED_FAIL              = 0x9,
 545         NVME_SC_FUSED_MISSING           = 0xa,
 546         NVME_SC_INVALID_NS              = 0xb,
 547         NVME_SC_CMD_SEQ_ERROR           = 0xc,
 548         NVME_SC_SGL_INVALID_LAST        = 0xd,
 549         NVME_SC_SGL_INVALID_COUNT       = 0xe,
 550         NVME_SC_SGL_INVALID_DATA        = 0xf,
 551         NVME_SC_SGL_INVALID_METADATA    = 0x10,
 552         NVME_SC_SGL_INVALID_TYPE        = 0x11,
 553         NVME_SC_LBA_RANGE               = 0x80,
 554         NVME_SC_CAP_EXCEEDED            = 0x81,
 555         NVME_SC_NS_NOT_READY            = 0x82,
 556         NVME_SC_RESERVATION_CONFLICT    = 0x83,
 557         NVME_SC_CQ_INVALID              = 0x100,
 558         NVME_SC_QID_INVALID             = 0x101,
 559         NVME_SC_QUEUE_SIZE              = 0x102,
 560         NVME_SC_ABORT_LIMIT             = 0x103,
 561         NVME_SC_ABORT_MISSING           = 0x104,
 562         NVME_SC_ASYNC_LIMIT             = 0x105,
 563         NVME_SC_FIRMWARE_SLOT           = 0x106,
 564         NVME_SC_FIRMWARE_IMAGE          = 0x107,
 565         NVME_SC_INVALID_VECTOR          = 0x108,
 566         NVME_SC_INVALID_LOG_PAGE        = 0x109,
 567         NVME_SC_INVALID_FORMAT          = 0x10a,
 568         NVME_SC_FIRMWARE_NEEDS_RESET    = 0x10b,
 569         NVME_SC_INVALID_QUEUE           = 0x10c,
 570         NVME_SC_FEATURE_NOT_SAVEABLE    = 0x10d,
 571         NVME_SC_FEATURE_NOT_CHANGEABLE  = 0x10e,
 572         NVME_SC_FEATURE_NOT_PER_NS      = 0x10f,
 573         NVME_SC_FW_NEEDS_RESET_SUBSYS   = 0x110,
 574         NVME_SC_BAD_ATTRIBUTES          = 0x180,
 575         NVME_SC_INVALID_PI              = 0x181,
 576         NVME_SC_READ_ONLY               = 0x182,
 577         NVME_SC_WRITE_FAULT             = 0x280,
 578         NVME_SC_READ_ERROR              = 0x281,
 579         NVME_SC_GUARD_CHECK             = 0x282,
 580         NVME_SC_APPTAG_CHECK            = 0x283,
 581         NVME_SC_REFTAG_CHECK            = 0x284,
 582         NVME_SC_COMPARE_FAILED          = 0x285,
 583         NVME_SC_ACCESS_DENIED           = 0x286,
 584         NVME_SC_DNR                     = 0x4000,
 585 };
 586
 587 struct nvme_completion {
 588         __le32  result;         /* Used by admin commands to return data */
 589         __u32   rsvd;
 590         __le16  sq_head;        /* how much of this queue may be reclaimed */
 591         __le16  sq_id;          /* submission queue that generated this entry */
 592         __u16   command_id;     /* of the command which completed */
 593         __le16  status;         /* did the command fail, and if so, why? */
 594 };
 595
 596 #define NVME_VS(major, minor) (((major) << 16) | ((minor) << 8))
 597
 598 #endif /* _LINUX_NVME_H */