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 #include <linux/types.h>
  19
  20 /* NQN names in commands fields specified one size */
  21 #define NVMF_NQN_FIELD_LEN      256
  22
  23 /* However the max length of a qualified name is another size */
  24 #define NVMF_NQN_SIZE           223
  25
  26 #define NVMF_TRSVCID_SIZE       32
  27 #define NVMF_TRADDR_SIZE        256
  28 #define NVMF_TSAS_SIZE          256
  29
  30 #define NVME_DISC_SUBSYS_NAME   "nqn.2014-08.org.nvmexpress.discovery"
  31
  32 #define NVME_RDMA_IP_PORT       4420
  33
  34 enum nvme_subsys_type {
  35         NVME_NQN_DISC   = 1,            /* Discovery type target subsystem */
  36         NVME_NQN_NVME   = 2,            /* NVME type target subsystem */
  37 };
  38
  39 /* Address Family codes for Discovery Log Page entry ADRFAM field */
  40 enum {
  41         NVMF_ADDR_FAMILY_PCI    = 0,    /* PCIe */
  42         NVMF_ADDR_FAMILY_IP4    = 1,    /* IP4 */
  43         NVMF_ADDR_FAMILY_IP6    = 2,    /* IP6 */
  44         NVMF_ADDR_FAMILY_IB     = 3,    /* InfiniBand */
  45         NVMF_ADDR_FAMILY_FC     = 4,    /* Fibre Channel */
  46 };
  47
  48 /* Transport Type codes for Discovery Log Page entry TRTYPE field */
  49 enum {
  50         NVMF_TRTYPE_RDMA        = 1,    /* RDMA */
  51         NVMF_TRTYPE_FC          = 2,    /* Fibre Channel */
  52         NVMF_TRTYPE_LOOP        = 254,  /* Reserved for host usage */
  53         NVMF_TRTYPE_MAX,
  54 };
  55
  56 /* Transport Requirements codes for Discovery Log Page entry TREQ field */
  57 enum {
  58         NVMF_TREQ_NOT_SPECIFIED = 0,    /* Not specified */
  59         NVMF_TREQ_REQUIRED      = 1,    /* Required */
  60         NVMF_TREQ_NOT_REQUIRED  = 2,    /* Not Required */
  61 };
  62
  63 /* RDMA QP Service Type codes for Discovery Log Page entry TSAS
  64  * RDMA_QPTYPE field
  65  */
  66 enum {
  67         NVMF_RDMA_QPTYPE_CONNECTED      = 0, /* Reliable Connected */
  68         NVMF_RDMA_QPTYPE_DATAGRAM       = 1, /* Reliable Datagram */
  69 };
  70
  71 /* RDMA QP Service Type codes for Discovery Log Page entry TSAS
  72  * RDMA_QPTYPE field
  73  */
  74 enum {
  75         NVMF_RDMA_PRTYPE_NOT_SPECIFIED  = 0, /* No Provider Specified */
  76         NVMF_RDMA_PRTYPE_IB             = 1, /* InfiniBand */
  77         NVMF_RDMA_PRTYPE_ROCE           = 2, /* InfiniBand RoCE */
  78         NVMF_RDMA_PRTYPE_ROCEV2         = 3, /* InfiniBand RoCEV2 */
  79         NVMF_RDMA_PRTYPE_IWARP          = 4, /* IWARP */
  80 };
  81
  82 /* RDMA Connection Management Service Type codes for Discovery Log Page
  83  * entry TSAS RDMA_CMS field
  84  */
  85 enum {
  86         NVMF_RDMA_CMS_RDMA_CM   = 0, /* Sockets based enpoint addressing */
  87 };
  88
  89 #define NVMF_AQ_DEPTH           32
  90
  91 enum {
  92         NVME_REG_CAP    = 0x0000,       /* Controller Capabilities */
  93         NVME_REG_VS     = 0x0008,       /* Version */
  94         NVME_REG_INTMS  = 0x000c,       /* Interrupt Mask Set */
  95         NVME_REG_INTMC  = 0x0010,       /* Interrupt Mask Clear */
  96         NVME_REG_CC     = 0x0014,       /* Controller Configuration */
  97         NVME_REG_CSTS   = 0x001c,       /* Controller Status */
  98         NVME_REG_NSSR   = 0x0020,       /* NVM Subsystem Reset */
  99         NVME_REG_AQA    = 0x0024,       /* Admin Queue Attributes */
 100         NVME_REG_ASQ    = 0x0028,       /* Admin SQ Base Address */
 101         NVME_REG_ACQ    = 0x0030,       /* Admin CQ Base Address */
 102         NVME_REG_CMBLOC = 0x0038,       /* Controller Memory Buffer Location */
 103         NVME_REG_CMBSZ  = 0x003c,       /* Controller Memory Buffer Size */
 104 };
 105
 106 #define NVME_CAP_MQES(cap)      ((cap) & 0xffff)
 107 #define NVME_CAP_TIMEOUT(cap)   (((cap) >> 24) & 0xff)
 108 #define NVME_CAP_STRIDE(cap)    (((cap) >> 32) & 0xf)
 109 #define NVME_CAP_NSSRC(cap)     (((cap) >> 36) & 0x1)
 110 #define NVME_CAP_MPSMIN(cap)    (((cap) >> 48) & 0xf)
 111 #define NVME_CAP_MPSMAX(cap)    (((cap) >> 52) & 0xf)
 112
 113 #define NVME_CMB_BIR(cmbloc)    ((cmbloc) & 0x7)
 114 #define NVME_CMB_OFST(cmbloc)   (((cmbloc) >> 12) & 0xfffff)
 115 #define NVME_CMB_SZ(cmbsz)      (((cmbsz) >> 12) & 0xfffff)
 116 #define NVME_CMB_SZU(cmbsz)     (((cmbsz) >> 8) & 0xf)
 117
 118 #define NVME_CMB_WDS(cmbsz)     ((cmbsz) & 0x10)
 119 #define NVME_CMB_RDS(cmbsz)     ((cmbsz) & 0x8)
 120 #define NVME_CMB_LISTS(cmbsz)   ((cmbsz) & 0x4)
 121 #define NVME_CMB_CQS(cmbsz)     ((cmbsz) & 0x2)
 122 #define NVME_CMB_SQS(cmbsz)     ((cmbsz) & 0x1)
 123
 124 /*
 125  * Submission and Completion Queue Entry Sizes for the NVM command set.
 126  * (In bytes and specified as a power of two (2^n)).
 127  */
 128 #define NVME_NVM_IOSQES         6
 129 #define NVME_NVM_IOCQES         4
 130
 131 enum {
 132         NVME_CC_ENABLE          = 1 << 0,
 133         NVME_CC_CSS_NVM         = 0 << 4,
 134         NVME_CC_MPS_SHIFT       = 7,
 135         NVME_CC_ARB_RR          = 0 << 11,
 136         NVME_CC_ARB_WRRU        = 1 << 11,
 137         NVME_CC_ARB_VS          = 7 << 11,
 138         NVME_CC_SHN_NONE        = 0 << 14,
 139         NVME_CC_SHN_NORMAL      = 1 << 14,
 140         NVME_CC_SHN_ABRUPT      = 2 << 14,
 141         NVME_CC_SHN_MASK        = 3 << 14,
 142         NVME_CC_IOSQES          = NVME_NVM_IOSQES << 16,
 143         NVME_CC_IOCQES          = NVME_NVM_IOCQES << 20,
 144         NVME_CSTS_RDY           = 1 << 0,
 145         NVME_CSTS_CFS           = 1 << 1,
 146         NVME_CSTS_NSSRO         = 1 << 4,
 147         NVME_CSTS_SHST_NORMAL   = 0 << 2,
 148         NVME_CSTS_SHST_OCCUR    = 1 << 2,
 149         NVME_CSTS_SHST_CMPLT    = 2 << 2,
 150         NVME_CSTS_SHST_MASK     = 3 << 2,
 151 };
 152
 153 struct nvme_id_power_state {
 154         __le16                  max_power;      /* centiwatts */
 155         __u8                    rsvd2;
 156         __u8                    flags;
 157         __le32                  entry_lat;      /* microseconds */
 158         __le32                  exit_lat;       /* microseconds */
 159         __u8                    read_tput;
 160         __u8                    read_lat;
 161         __u8                    write_tput;
 162         __u8                    write_lat;
 163         __le16                  idle_power;
 164         __u8                    idle_scale;
 165         __u8                    rsvd19;
 166         __le16                  active_power;
 167         __u8                    active_work_scale;
 168         __u8                    rsvd23[9];
 169 };
 170
 171 enum {
 172         NVME_PS_FLAGS_MAX_POWER_SCALE   = 1 << 0,
 173         NVME_PS_FLAGS_NON_OP_STATE      = 1 << 1,
 174 };
 175
 176 struct nvme_id_ctrl {
 177         __le16                  vid;
 178         __le16                  ssvid;
 179         char                    sn[20];
 180         char                    mn[40];
 181         char                    fr[8];
 182         __u8                    rab;
 183         __u8                    ieee[3];
 184         __u8                    cmic;
 185         __u8                    mdts;
 186         __le16                  cntlid;
 187         __le32                  ver;
 188         __le32                  rtd3r;
 189         __le32                  rtd3e;
 190         __le32                  oaes;
 191         __le32                  ctratt;
 192         __u8                    rsvd100[156];
 193         __le16                  oacs;
 194         __u8                    acl;
 195         __u8                    aerl;
 196         __u8                    frmw;
 197         __u8                    lpa;
 198         __u8                    elpe;
 199         __u8                    npss;
 200         __u8                    avscc;
 201         __u8                    apsta;
 202         __le16                  wctemp;
 203         __le16                  cctemp;
 204         __le16                  mtfa;
 205         __le32                  hmpre;
 206         __le32                  hmmin;
 207         __u8                    tnvmcap[16];
 208         __u8                    unvmcap[16];
 209         __le32                  rpmbs;
 210         __u8                    rsvd316[4];
 211         __le16                  kas;
 212         __u8                    rsvd322[190];
 213         __u8                    sqes;
 214         __u8                    cqes;
 215         __le16                  maxcmd;
 216         __le32                  nn;
 217         __le16                  oncs;
 218         __le16                  fuses;
 219         __u8                    fna;
 220         __u8                    vwc;
 221         __le16                  awun;
 222         __le16                  awupf;
 223         __u8                    nvscc;
 224         __u8                    rsvd531;
 225         __le16                  acwu;
 226         __u8                    rsvd534[2];
 227         __le32                  sgls;
 228         __u8                    rsvd540[228];
 229         char                    subnqn[256];
 230         __u8                    rsvd1024[768];
 231         __le32                  ioccsz;
 232         __le32                  iorcsz;
 233         __le16                  icdoff;
 234         __u8                    ctrattr;
 235         __u8                    msdbd;
 236         __u8                    rsvd1804[244];
 237         struct nvme_id_power_state      psd[32];
 238         __u8                    vs[1024];
 239 };
 240
 241 enum {
 242         NVME_CTRL_ONCS_COMPARE                  = 1 << 0,
 243         NVME_CTRL_ONCS_WRITE_UNCORRECTABLE      = 1 << 1,
 244         NVME_CTRL_ONCS_DSM                      = 1 << 2,
 245         NVME_CTRL_VWC_PRESENT                   = 1 << 0,
 246 };
 247
 248 struct nvme_lbaf {
 249         __le16                  ms;
 250         __u8                    ds;
 251         __u8                    rp;
 252 };
 253
 254 struct nvme_id_ns {
 255         __le64                  nsze;
 256         __le64                  ncap;
 257         __le64                  nuse;
 258         __u8                    nsfeat;
 259         __u8                    nlbaf;
 260         __u8                    flbas;
 261         __u8                    mc;
 262         __u8                    dpc;
 263         __u8                    dps;
 264         __u8                    nmic;
 265         __u8                    rescap;
 266         __u8                    fpi;
 267         __u8                    rsvd33;
 268         __le16                  nawun;
 269         __le16                  nawupf;
 270         __le16                  nacwu;
 271         __le16                  nabsn;
 272         __le16                  nabo;
 273         __le16                  nabspf;
 274         __u16                   rsvd46;
 275         __u8                    nvmcap[16];
 276         __u8                    rsvd64[40];
 277         __u8                    nguid[16];
 278         __u8                    eui64[8];
 279         struct nvme_lbaf        lbaf[16];
 280         __u8                    rsvd192[192];
 281         __u8                    vs[3712];
 282 };
 283
 284 enum {
 285         NVME_NS_FEAT_THIN       = 1 << 0,
 286         NVME_NS_FLBAS_LBA_MASK  = 0xf,
 287         NVME_NS_FLBAS_META_EXT  = 0x10,
 288         NVME_LBAF_RP_BEST       = 0,
 289         NVME_LBAF_RP_BETTER     = 1,
 290         NVME_LBAF_RP_GOOD       = 2,
 291         NVME_LBAF_RP_DEGRADED   = 3,
 292         NVME_NS_DPC_PI_LAST     = 1 << 4,
 293         NVME_NS_DPC_PI_FIRST    = 1 << 3,
 294         NVME_NS_DPC_PI_TYPE3    = 1 << 2,
 295         NVME_NS_DPC_PI_TYPE2    = 1 << 1,
 296         NVME_NS_DPC_PI_TYPE1    = 1 << 0,
 297         NVME_NS_DPS_PI_FIRST    = 1 << 3,
 298         NVME_NS_DPS_PI_MASK     = 0x7,
 299         NVME_NS_DPS_PI_TYPE1    = 1,
 300         NVME_NS_DPS_PI_TYPE2    = 2,
 301         NVME_NS_DPS_PI_TYPE3    = 3,
 302 };
 303
 304 struct nvme_smart_log {
 305         __u8                    critical_warning;
 306         __u8                    temperature[2];
 307         __u8                    avail_spare;
 308         __u8                    spare_thresh;
 309         __u8                    percent_used;
 310         __u8                    rsvd6[26];
 311         __u8                    data_units_read[16];
 312         __u8                    data_units_written[16];
 313         __u8                    host_reads[16];
 314         __u8                    host_writes[16];
 315         __u8                    ctrl_busy_time[16];
 316         __u8                    power_cycles[16];
 317         __u8                    power_on_hours[16];
 318         __u8                    unsafe_shutdowns[16];
 319         __u8                    media_errors[16];
 320         __u8                    num_err_log_entries[16];
 321         __le32                  warning_temp_time;
 322         __le32                  critical_comp_time;
 323         __le16                  temp_sensor[8];
 324         __u8                    rsvd216[296];
 325 };
 326
 327 enum {
 328         NVME_SMART_CRIT_SPARE           = 1 << 0,
 329         NVME_SMART_CRIT_TEMPERATURE     = 1 << 1,
 330         NVME_SMART_CRIT_RELIABILITY     = 1 << 2,
 331         NVME_SMART_CRIT_MEDIA           = 1 << 3,
 332         NVME_SMART_CRIT_VOLATILE_MEMORY = 1 << 4,
 333 };
 334
 335 enum {
 336         NVME_AER_NOTICE_NS_CHANGED      = 0x0002,
 337 };
 338
 339 struct nvme_lba_range_type {
 340         __u8                    type;
 341         __u8                    attributes;
 342         __u8                    rsvd2[14];
 343         __u64                   slba;
 344         __u64                   nlb;
 345         __u8                    guid[16];
 346         __u8                    rsvd48[16];
 347 };
 348
 349 enum {
 350         NVME_LBART_TYPE_FS      = 0x01,
 351         NVME_LBART_TYPE_RAID    = 0x02,
 352         NVME_LBART_TYPE_CACHE   = 0x03,
 353         NVME_LBART_TYPE_SWAP    = 0x04,
 354
 355         NVME_LBART_ATTRIB_TEMP  = 1 << 0,
 356         NVME_LBART_ATTRIB_HIDE  = 1 << 1,
 357 };
 358
 359 struct nvme_reservation_status {
 360         __le32  gen;
 361         __u8    rtype;
 362         __u8    regctl[2];
 363         __u8    resv5[2];
 364         __u8    ptpls;
 365         __u8    resv10[13];
 366         struct {
 367                 __le16  cntlid;
 368                 __u8    rcsts;
 369                 __u8    resv3[5];
 370                 __le64  hostid;
 371                 __le64  rkey;
 372         } regctl_ds[];
 373 };
 374
 375 enum nvme_async_event_type {
 376         NVME_AER_TYPE_ERROR     = 0,
 377         NVME_AER_TYPE_SMART     = 1,
 378         NVME_AER_TYPE_NOTICE    = 2,
 379 };
 380
 381 /* I/O commands */
 382
 383 enum nvme_opcode {
 384         nvme_cmd_flush          = 0x00,
 385         nvme_cmd_write          = 0x01,
 386         nvme_cmd_read           = 0x02,
 387         nvme_cmd_write_uncor    = 0x04,
 388         nvme_cmd_compare        = 0x05,
 389         nvme_cmd_write_zeroes   = 0x08,
 390         nvme_cmd_dsm            = 0x09,
 391         nvme_cmd_resv_register  = 0x0d,
 392         nvme_cmd_resv_report    = 0x0e,
 393         nvme_cmd_resv_acquire   = 0x11,
 394         nvme_cmd_resv_release   = 0x15,
 395 };
 396
 397 /*
 398  * Descriptor subtype - lower 4 bits of nvme_(keyed_)sgl_desc identifier
 399  *
 400  * @NVME_SGL_FMT_ADDRESS:     absolute address of the data block
 401  * @NVME_SGL_FMT_OFFSET:      relative offset of the in-capsule data block
 402  * @NVME_SGL_FMT_INVALIDATE:  RDMA transport specific remote invalidation
 403  *                            request subtype
 404  */
 405 enum {
 406         NVME_SGL_FMT_ADDRESS            = 0x00,
 407         NVME_SGL_FMT_OFFSET             = 0x01,
 408         NVME_SGL_FMT_INVALIDATE         = 0x0f,
 409 };
 410
 411 /*
 412  * Descriptor type - upper 4 bits of nvme_(keyed_)sgl_desc identifier
 413  *
 414  * For struct nvme_sgl_desc:
 415  *   @NVME_SGL_FMT_DATA_DESC:           data block descriptor
 416  *   @NVME_SGL_FMT_SEG_DESC:            sgl segment descriptor
 417  *   @NVME_SGL_FMT_LAST_SEG_DESC:       last sgl segment descriptor
 418  *
 419  * For struct nvme_keyed_sgl_desc:
 420  *   @NVME_KEY_SGL_FMT_DATA_DESC:       keyed data block descriptor
 421  */
 422 enum {
 423         NVME_SGL_FMT_DATA_DESC          = 0x00,
 424         NVME_SGL_FMT_SEG_DESC           = 0x02,
 425         NVME_SGL_FMT_LAST_SEG_DESC      = 0x03,
 426         NVME_KEY_SGL_FMT_DATA_DESC      = 0x04,
 427 };
 428
 429 struct nvme_sgl_desc {
 430         __le64  addr;
 431         __le32  length;
 432         __u8    rsvd[3];
 433         __u8    type;
 434 };
 435
 436 struct nvme_keyed_sgl_desc {
 437         __le64  addr;
 438         __u8    length[3];
 439         __u8    key[4];
 440         __u8    type;
 441 };
 442
 443 union nvme_data_ptr {
 444         struct {
 445                 __le64  prp1;
 446                 __le64  prp2;
 447         };
 448         struct nvme_sgl_desc    sgl;
 449         struct nvme_keyed_sgl_desc ksgl;
 450 };
 451
 452 /*
 453  * Lowest two bits of our flags field (FUSE field in the spec):
 454  *
 455  * @NVME_CMD_FUSE_FIRST:   Fused Operation, first command
 456  * @NVME_CMD_FUSE_SECOND:  Fused Operation, second command
 457  *
 458  * Highest two bits in our flags field (PSDT field in the spec):
 459  *
 460  * @NVME_CMD_PSDT_SGL_METABUF:  Use SGLS for this transfer,
 461  *      If used, MPTR contains addr of single physical buffer (byte aligned).
 462  * @NVME_CMD_PSDT_SGL_METASEG:  Use SGLS for this transfer,
 463  *      If used, MPTR contains an address of an SGL segment containing
 464  *      exactly 1 SGL descriptor (qword aligned).
 465  */
 466 enum {
 467         NVME_CMD_FUSE_FIRST     = (1 << 0),
 468         NVME_CMD_FUSE_SECOND    = (1 << 1),
 469
 470         NVME_CMD_SGL_METABUF    = (1 << 6),
 471         NVME_CMD_SGL_METASEG    = (1 << 7),
 472         NVME_CMD_SGL_ALL        = NVME_CMD_SGL_METABUF | NVME_CMD_SGL_METASEG,
 473 };
 474
 475 struct nvme_common_command {
 476         __u8                    opcode;
 477         __u8                    flags;
 478         __u16                   command_id;
 479         __le32                  nsid;
 480         __le32                  cdw2[2];
 481         __le64                  metadata;
 482         union nvme_data_ptr     dptr;
 483         __le32                  cdw10[6];
 484 };
 485
 486 struct nvme_rw_command {
 487         __u8                    opcode;
 488         __u8                    flags;
 489         __u16                   command_id;
 490         __le32                  nsid;
 491         __u64                   rsvd2;
 492         __le64                  metadata;
 493         union nvme_data_ptr     dptr;
 494         __le64                  slba;
 495         __le16                  length;
 496         __le16                  control;
 497         __le32                  dsmgmt;
 498         __le32                  reftag;
 499         __le16                  apptag;
 500         __le16                  appmask;
 501 };
 502
 503 enum {
 504         NVME_RW_LR                      = 1 << 15,
 505         NVME_RW_FUA                     = 1 << 14,
 506         NVME_RW_DSM_FREQ_UNSPEC         = 0,
 507         NVME_RW_DSM_FREQ_TYPICAL        = 1,
 508         NVME_RW_DSM_FREQ_RARE           = 2,
 509         NVME_RW_DSM_FREQ_READS          = 3,
 510         NVME_RW_DSM_FREQ_WRITES         = 4,
 511         NVME_RW_DSM_FREQ_RW             = 5,
 512         NVME_RW_DSM_FREQ_ONCE           = 6,
 513         NVME_RW_DSM_FREQ_PREFETCH       = 7,
 514         NVME_RW_DSM_FREQ_TEMP           = 8,
 515         NVME_RW_DSM_LATENCY_NONE        = 0 << 4,
 516         NVME_RW_DSM_LATENCY_IDLE        = 1 << 4,
 517         NVME_RW_DSM_LATENCY_NORM        = 2 << 4,
 518         NVME_RW_DSM_LATENCY_LOW         = 3 << 4,
 519         NVME_RW_DSM_SEQ_REQ             = 1 << 6,
 520         NVME_RW_DSM_COMPRESSED          = 1 << 7,
 521         NVME_RW_PRINFO_PRCHK_REF        = 1 << 10,
 522         NVME_RW_PRINFO_PRCHK_APP        = 1 << 11,
 523         NVME_RW_PRINFO_PRCHK_GUARD      = 1 << 12,
 524         NVME_RW_PRINFO_PRACT            = 1 << 13,
 525 };
 526
 527 struct nvme_dsm_cmd {
 528         __u8                    opcode;
 529         __u8                    flags;
 530         __u16                   command_id;
 531         __le32                  nsid;
 532         __u64                   rsvd2[2];
 533         union nvme_data_ptr     dptr;
 534         __le32                  nr;
 535         __le32                  attributes;
 536         __u32                   rsvd12[4];
 537 };
 538
 539 enum {
 540         NVME_DSMGMT_IDR         = 1 << 0,
 541         NVME_DSMGMT_IDW         = 1 << 1,
 542         NVME_DSMGMT_AD          = 1 << 2,
 543 };
 544
 545 struct nvme_dsm_range {
 546         __le32                  cattr;
 547         __le32                  nlb;
 548         __le64                  slba;
 549 };
 550
 551 /* Admin commands */
 552
 553 enum nvme_admin_opcode {
 554         nvme_admin_delete_sq            = 0x00,
 555         nvme_admin_create_sq            = 0x01,
 556         nvme_admin_get_log_page         = 0x02,
 557         nvme_admin_delete_cq            = 0x04,
 558         nvme_admin_create_cq            = 0x05,
 559         nvme_admin_identify             = 0x06,
 560         nvme_admin_abort_cmd            = 0x08,
 561         nvme_admin_set_features         = 0x09,
 562         nvme_admin_get_features         = 0x0a,
 563         nvme_admin_async_event          = 0x0c,
 564         nvme_admin_ns_mgmt              = 0x0d,
 565         nvme_admin_activate_fw          = 0x10,
 566         nvme_admin_download_fw          = 0x11,
 567         nvme_admin_ns_attach            = 0x15,
 568         nvme_admin_keep_alive           = 0x18,
 569         nvme_admin_format_nvm           = 0x80,
 570         nvme_admin_security_send        = 0x81,
 571         nvme_admin_security_recv        = 0x82,
 572 };
 573
 574 enum {
 575         NVME_QUEUE_PHYS_CONTIG  = (1 << 0),
 576         NVME_CQ_IRQ_ENABLED     = (1 << 1),
 577         NVME_SQ_PRIO_URGENT     = (0 << 1),
 578         NVME_SQ_PRIO_HIGH       = (1 << 1),
 579         NVME_SQ_PRIO_MEDIUM     = (2 << 1),
 580         NVME_SQ_PRIO_LOW        = (3 << 1),
 581         NVME_FEAT_ARBITRATION   = 0x01,
 582         NVME_FEAT_POWER_MGMT    = 0x02,
 583         NVME_FEAT_LBA_RANGE     = 0x03,
 584         NVME_FEAT_TEMP_THRESH   = 0x04,
 585         NVME_FEAT_ERR_RECOVERY  = 0x05,
 586         NVME_FEAT_VOLATILE_WC   = 0x06,
 587         NVME_FEAT_NUM_QUEUES    = 0x07,
 588         NVME_FEAT_IRQ_COALESCE  = 0x08,
 589         NVME_FEAT_IRQ_CONFIG    = 0x09,
 590         NVME_FEAT_WRITE_ATOMIC  = 0x0a,
 591         NVME_FEAT_ASYNC_EVENT   = 0x0b,
 592         NVME_FEAT_AUTO_PST      = 0x0c,
 593         NVME_FEAT_HOST_MEM_BUF  = 0x0d,
 594         NVME_FEAT_KATO          = 0x0f,
 595         NVME_FEAT_SW_PROGRESS   = 0x80,
 596         NVME_FEAT_HOST_ID       = 0x81,
 597         NVME_FEAT_RESV_MASK     = 0x82,
 598         NVME_FEAT_RESV_PERSIST  = 0x83,
 599         NVME_LOG_ERROR          = 0x01,
 600         NVME_LOG_SMART          = 0x02,
 601         NVME_LOG_FW_SLOT        = 0x03,
 602         NVME_LOG_DISC           = 0x70,
 603         NVME_LOG_RESERVATION    = 0x80,
 604         NVME_FWACT_REPL         = (0 << 3),
 605         NVME_FWACT_REPL_ACTV    = (1 << 3),
 606         NVME_FWACT_ACTV         = (2 << 3),
 607 };
 608
 609 struct nvme_identify {
 610         __u8                    opcode;
 611         __u8                    flags;
 612         __u16                   command_id;
 613         __le32                  nsid;
 614         __u64                   rsvd2[2];
 615         union nvme_data_ptr     dptr;
 616         __le32                  cns;
 617         __u32                   rsvd11[5];
 618 };
 619
 620 struct nvme_features {
 621         __u8                    opcode;
 622         __u8                    flags;
 623         __u16                   command_id;
 624         __le32                  nsid;
 625         __u64                   rsvd2[2];
 626         union nvme_data_ptr     dptr;
 627         __le32                  fid;
 628         __le32                  dword11;
 629         __u32                   rsvd12[4];
 630 };
 631
 632 struct nvme_create_cq {
 633         __u8                    opcode;
 634         __u8                    flags;
 635         __u16                   command_id;
 636         __u32                   rsvd1[5];
 637         __le64                  prp1;
 638         __u64                   rsvd8;
 639         __le16                  cqid;
 640         __le16                  qsize;
 641         __le16                  cq_flags;
 642         __le16                  irq_vector;
 643         __u32                   rsvd12[4];
 644 };
 645
 646 struct nvme_create_sq {
 647         __u8                    opcode;
 648         __u8                    flags;
 649         __u16                   command_id;
 650         __u32                   rsvd1[5];
 651         __le64                  prp1;
 652         __u64                   rsvd8;
 653         __le16                  sqid;
 654         __le16                  qsize;
 655         __le16                  sq_flags;
 656         __le16                  cqid;
 657         __u32                   rsvd12[4];
 658 };
 659
 660 struct nvme_delete_queue {
 661         __u8                    opcode;
 662         __u8                    flags;
 663         __u16                   command_id;
 664         __u32                   rsvd1[9];
 665         __le16                  qid;
 666         __u16                   rsvd10;
 667         __u32                   rsvd11[5];
 668 };
 669
 670 struct nvme_abort_cmd {
 671         __u8                    opcode;
 672         __u8                    flags;
 673         __u16                   command_id;
 674         __u32                   rsvd1[9];
 675         __le16                  sqid;
 676         __u16                   cid;
 677         __u32                   rsvd11[5];
 678 };
 679
 680 struct nvme_download_firmware {
 681         __u8                    opcode;
 682         __u8                    flags;
 683         __u16                   command_id;
 684         __u32                   rsvd1[5];
 685         union nvme_data_ptr     dptr;
 686         __le32                  numd;
 687         __le32                  offset;
 688         __u32                   rsvd12[4];
 689 };
 690
 691 struct nvme_format_cmd {
 692         __u8                    opcode;
 693         __u8                    flags;
 694         __u16                   command_id;
 695         __le32                  nsid;
 696         __u64                   rsvd2[4];
 697         __le32                  cdw10;
 698         __u32                   rsvd11[5];
 699 };
 700
 701 struct nvme_get_log_page_command {
 702         __u8                    opcode;
 703         __u8                    flags;
 704         __u16                   command_id;
 705         __le32                  nsid;
 706         __u64                   rsvd2[2];
 707         union nvme_data_ptr     dptr;
 708         __u8                    lid;
 709         __u8                    rsvd10;
 710         __le16                  numdl;
 711         __le16                  numdu;
 712         __u16                   rsvd11;
 713         __le32                  lpol;
 714         __le32                  lpou;
 715         __u32                   rsvd14[2];
 716 };
 717
 718 /*
 719  * Fabrics subcommands.
 720  */
 721 enum nvmf_fabrics_opcode {
 722         nvme_fabrics_command            = 0x7f,
 723 };
 724
 725 enum nvmf_capsule_command {
 726         nvme_fabrics_type_property_set  = 0x00,
 727         nvme_fabrics_type_connect       = 0x01,
 728         nvme_fabrics_type_property_get  = 0x04,
 729 };
 730
 731 struct nvmf_common_command {
 732         __u8    opcode;
 733         __u8    resv1;
 734         __u16   command_id;
 735         __u8    fctype;
 736         __u8    resv2[35];
 737         __u8    ts[24];
 738 };
 739
 740 /*
 741  * The legal cntlid range a NVMe Target will provide.
 742  * Note that cntlid of value 0 is considered illegal in the fabrics world.
 743  * Devices based on earlier specs did not have the subsystem concept;
 744  * therefore, those devices had their cntlid value set to 0 as a result.
 745  */
 746 #define NVME_CNTLID_MIN         1
 747 #define NVME_CNTLID_MAX         0xffef
 748 #define NVME_CNTLID_DYNAMIC     0xffff
 749
 750 #define MAX_DISC_LOGS   255
 751
 752 /* Discovery log page entry */
 753 struct nvmf_disc_rsp_page_entry {
 754         __u8            trtype;
 755         __u8            adrfam;
 756         __u8            subtype;
 757         __u8            treq;
 758         __le16          portid;
 759         __le16          cntlid;
 760         __le16          asqsz;
 761         __u8            resv8[22];
 762         char            trsvcid[NVMF_TRSVCID_SIZE];
 763         __u8            resv64[192];
 764         char            subnqn[NVMF_NQN_FIELD_LEN];
 765         char            traddr[NVMF_TRADDR_SIZE];
 766         union tsas {
 767                 char            common[NVMF_TSAS_SIZE];
 768                 struct rdma {
 769                         __u8    qptype;
 770                         __u8    prtype;
 771                         __u8    cms;
 772                         __u8    resv3[5];
 773                         __u16   pkey;
 774                         __u8    resv10[246];
 775                 } rdma;
 776         } tsas;
 777 };
 778
 779 /* Discovery log page header */
 780 struct nvmf_disc_rsp_page_hdr {
 781         __le64          genctr;
 782         __le64          numrec;
 783         __le16          recfmt;
 784         __u8            resv14[1006];
 785         struct nvmf_disc_rsp_page_entry entries[0];
 786 };
 787
 788 struct nvmf_connect_command {
 789         __u8            opcode;
 790         __u8            resv1;
 791         __u16           command_id;
 792         __u8            fctype;
 793         __u8            resv2[19];
 794         union nvme_data_ptr dptr;
 795         __le16          recfmt;
 796         __le16          qid;
 797         __le16          sqsize;
 798         __u8            cattr;
 799         __u8            resv3;
 800         __le32          kato;
 801         __u8            resv4[12];
 802 };
 803
 804 struct nvmf_connect_data {
 805         __u8            hostid[16];
 806         __le16          cntlid;
 807         char            resv4[238];
 808         char            subsysnqn[NVMF_NQN_FIELD_LEN];
 809         char            hostnqn[NVMF_NQN_FIELD_LEN];
 810         char            resv5[256];
 811 };
 812
 813 struct nvmf_property_set_command {
 814         __u8            opcode;
 815         __u8            resv1;
 816         __u16           command_id;
 817         __u8            fctype;
 818         __u8            resv2[35];
 819         __u8            attrib;
 820         __u8            resv3[3];
 821         __le32          offset;
 822         __le64          value;
 823         __u8            resv4[8];
 824 };
 825
 826 struct nvmf_property_get_command {
 827         __u8            opcode;
 828         __u8            resv1;
 829         __u16           command_id;
 830         __u8            fctype;
 831         __u8            resv2[35];
 832         __u8            attrib;
 833         __u8            resv3[3];
 834         __le32          offset;
 835         __u8            resv4[16];
 836 };
 837
 838 struct nvme_command {
 839         union {
 840                 struct nvme_common_command common;
 841                 struct nvme_rw_command rw;
 842                 struct nvme_identify identify;
 843                 struct nvme_features features;
 844                 struct nvme_create_cq create_cq;
 845                 struct nvme_create_sq create_sq;
 846                 struct nvme_delete_queue delete_queue;
 847                 struct nvme_download_firmware dlfw;
 848                 struct nvme_format_cmd format;
 849                 struct nvme_dsm_cmd dsm;
 850                 struct nvme_abort_cmd abort;
 851                 struct nvme_get_log_page_command get_log_page;
 852                 struct nvmf_common_command fabrics;
 853                 struct nvmf_connect_command connect;
 854                 struct nvmf_property_set_command prop_set;
 855                 struct nvmf_property_get_command prop_get;
 856         };
 857 };
 858
 859 static inline bool nvme_is_write(struct nvme_command *cmd)
 860 {
 861         /*
 862          * What a mess...
 863          *
 864          * Why can't we simply have a Fabrics In and Fabrics out command?
 865          */
 866         if (unlikely(cmd->common.opcode == nvme_fabrics_command))
 867                 return cmd->fabrics.opcode & 1;
 868         return cmd->common.opcode & 1;
 869 }
 870
 871 enum {
 872         /*
 873          * Generic Command Status:
 874          */
 875         NVME_SC_SUCCESS                 = 0x0,
 876         NVME_SC_INVALID_OPCODE          = 0x1,
 877         NVME_SC_INVALID_FIELD           = 0x2,
 878         NVME_SC_CMDID_CONFLICT          = 0x3,
 879         NVME_SC_DATA_XFER_ERROR         = 0x4,
 880         NVME_SC_POWER_LOSS              = 0x5,
 881         NVME_SC_INTERNAL                = 0x6,
 882         NVME_SC_ABORT_REQ               = 0x7,
 883         NVME_SC_ABORT_QUEUE             = 0x8,
 884         NVME_SC_FUSED_FAIL              = 0x9,
 885         NVME_SC_FUSED_MISSING           = 0xa,
 886         NVME_SC_INVALID_NS              = 0xb,
 887         NVME_SC_CMD_SEQ_ERROR           = 0xc,
 888         NVME_SC_SGL_INVALID_LAST        = 0xd,
 889         NVME_SC_SGL_INVALID_COUNT       = 0xe,
 890         NVME_SC_SGL_INVALID_DATA        = 0xf,
 891         NVME_SC_SGL_INVALID_METADATA    = 0x10,
 892         NVME_SC_SGL_INVALID_TYPE        = 0x11,
 893
 894         NVME_SC_SGL_INVALID_OFFSET      = 0x16,
 895         NVME_SC_SGL_INVALID_SUBTYPE     = 0x17,
 896
 897         NVME_SC_LBA_RANGE               = 0x80,
 898         NVME_SC_CAP_EXCEEDED            = 0x81,
 899         NVME_SC_NS_NOT_READY            = 0x82,
 900         NVME_SC_RESERVATION_CONFLICT    = 0x83,
 901
 902         /*
 903          * Command Specific Status:
 904          */
 905         NVME_SC_CQ_INVALID              = 0x100,
 906         NVME_SC_QID_INVALID             = 0x101,
 907         NVME_SC_QUEUE_SIZE              = 0x102,
 908         NVME_SC_ABORT_LIMIT             = 0x103,
 909         NVME_SC_ABORT_MISSING           = 0x104,
 910         NVME_SC_ASYNC_LIMIT             = 0x105,
 911         NVME_SC_FIRMWARE_SLOT           = 0x106,
 912         NVME_SC_FIRMWARE_IMAGE          = 0x107,
 913         NVME_SC_INVALID_VECTOR          = 0x108,
 914         NVME_SC_INVALID_LOG_PAGE        = 0x109,
 915         NVME_SC_INVALID_FORMAT          = 0x10a,
 916         NVME_SC_FW_NEEDS_CONV_RESET     = 0x10b,
 917         NVME_SC_INVALID_QUEUE           = 0x10c,
 918         NVME_SC_FEATURE_NOT_SAVEABLE    = 0x10d,
 919         NVME_SC_FEATURE_NOT_CHANGEABLE  = 0x10e,
 920         NVME_SC_FEATURE_NOT_PER_NS      = 0x10f,
 921         NVME_SC_FW_NEEDS_SUBSYS_RESET   = 0x110,
 922         NVME_SC_FW_NEEDS_RESET          = 0x111,
 923         NVME_SC_FW_NEEDS_MAX_TIME       = 0x112,
 924         NVME_SC_FW_ACIVATE_PROHIBITED   = 0x113,
 925         NVME_SC_OVERLAPPING_RANGE       = 0x114,
 926         NVME_SC_NS_INSUFFICENT_CAP      = 0x115,
 927         NVME_SC_NS_ID_UNAVAILABLE       = 0x116,
 928         NVME_SC_NS_ALREADY_ATTACHED     = 0x118,
 929         NVME_SC_NS_IS_PRIVATE           = 0x119,
 930         NVME_SC_NS_NOT_ATTACHED         = 0x11a,
 931         NVME_SC_THIN_PROV_NOT_SUPP      = 0x11b,
 932         NVME_SC_CTRL_LIST_INVALID       = 0x11c,
 933
 934         /*
 935          * I/O Command Set Specific - NVM commands:
 936          */
 937         NVME_SC_BAD_ATTRIBUTES          = 0x180,
 938         NVME_SC_INVALID_PI              = 0x181,
 939         NVME_SC_READ_ONLY               = 0x182,
 940
 941         /*
 942          * I/O Command Set Specific - Fabrics commands:
 943          */
 944         NVME_SC_CONNECT_FORMAT          = 0x180,
 945         NVME_SC_CONNECT_CTRL_BUSY       = 0x181,
 946         NVME_SC_CONNECT_INVALID_PARAM   = 0x182,
 947         NVME_SC_CONNECT_RESTART_DISC    = 0x183,
 948         NVME_SC_CONNECT_INVALID_HOST    = 0x184,
 949
 950         NVME_SC_DISCOVERY_RESTART       = 0x190,
 951         NVME_SC_AUTH_REQUIRED           = 0x191,
 952
 953         /*
 954          * Media and Data Integrity Errors:
 955          */
 956         NVME_SC_WRITE_FAULT             = 0x280,
 957         NVME_SC_READ_ERROR              = 0x281,
 958         NVME_SC_GUARD_CHECK             = 0x282,
 959         NVME_SC_APPTAG_CHECK            = 0x283,
 960         NVME_SC_REFTAG_CHECK            = 0x284,
 961         NVME_SC_COMPARE_FAILED          = 0x285,
 962         NVME_SC_ACCESS_DENIED           = 0x286,
 963         NVME_SC_UNWRITTEN_BLOCK         = 0x287,
 964
 965         NVME_SC_DNR                     = 0x4000,
 966 };
 967
 968 struct nvme_completion {
 969         /*
 970          * Used by Admin and Fabrics commands to return data:
 971          */
 972         union {
 973                 __le16  result16;
 974                 __le32  result;
 975                 __le64  result64;
 976         };
 977         __le16  sq_head;        /* how much of this queue may be reclaimed */
 978         __le16  sq_id;          /* submission queue that generated this entry */
 979         __u16   command_id;     /* of the command which completed */
 980         __le16  status;         /* did the command fail, and if so, why? */
 981 };
 982
 983 #define NVME_VS(major, minor, tertiary) \
 984         (((major) << 16) | ((minor) << 8) | (tertiary))
 985
 986 #endif /* _LINUX_NVME_H */