drivers/scsi/fnic/vnic_devcmd.h

   1 /*
   2  * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * This program is free software; you may redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  16  * SOFTWARE.
  17  */
  18 #ifndef _VNIC_DEVCMD_H_
  19 #define _VNIC_DEVCMD_H_
  20
  21 #define _CMD_NBITS      14
  22 #define _CMD_VTYPEBITS  10
  23 #define _CMD_FLAGSBITS  6
  24 #define _CMD_DIRBITS    2
  25
  26 #define _CMD_NMASK      ((1 << _CMD_NBITS)-1)
  27 #define _CMD_VTYPEMASK  ((1 << _CMD_VTYPEBITS)-1)
  28 #define _CMD_FLAGSMASK  ((1 << _CMD_FLAGSBITS)-1)
  29 #define _CMD_DIRMASK    ((1 << _CMD_DIRBITS)-1)
  30
  31 #define _CMD_NSHIFT     0
  32 #define _CMD_VTYPESHIFT (_CMD_NSHIFT+_CMD_NBITS)
  33 #define _CMD_FLAGSSHIFT (_CMD_VTYPESHIFT+_CMD_VTYPEBITS)
  34 #define _CMD_DIRSHIFT   (_CMD_FLAGSSHIFT+_CMD_FLAGSBITS)
  35
  36 /*
  37  * Direction bits (from host perspective).
  38  */
  39 #define _CMD_DIR_NONE   0U
  40 #define _CMD_DIR_WRITE  1U
  41 #define _CMD_DIR_READ   2U
  42 #define _CMD_DIR_RW     (_CMD_DIR_WRITE | _CMD_DIR_READ)
  43
  44 /*
  45  * Flag bits.
  46  */
  47 #define _CMD_FLAGS_NONE 0U
  48 #define _CMD_FLAGS_NOWAIT 1U
  49
  50 /*
  51  * vNIC type bits.
  52  */
  53 #define _CMD_VTYPE_NONE  0U
  54 #define _CMD_VTYPE_ENET  1U
  55 #define _CMD_VTYPE_FC    2U
  56 #define _CMD_VTYPE_SCSI  4U
  57 #define _CMD_VTYPE_ALL   (_CMD_VTYPE_ENET | _CMD_VTYPE_FC | _CMD_VTYPE_SCSI)
  58
  59 /*
  60  * Used to create cmds..
  61 */
  62 #define _CMDCF(dir, flags, vtype, nr)  \
  63         (((dir)   << _CMD_DIRSHIFT) | \
  64         ((flags) << _CMD_FLAGSSHIFT) | \
  65         ((vtype) << _CMD_VTYPESHIFT) | \
  66         ((nr)    << _CMD_NSHIFT))
  67 #define _CMDC(dir, vtype, nr)    _CMDCF(dir, 0, vtype, nr)
  68 #define _CMDCNW(dir, vtype, nr)  _CMDCF(dir, _CMD_FLAGS_NOWAIT, vtype, nr)
  69
  70 /*
  71  * Used to decode cmds..
  72 */
  73 #define _CMD_DIR(cmd)            (((cmd) >> _CMD_DIRSHIFT) & _CMD_DIRMASK)
  74 #define _CMD_FLAGS(cmd)          (((cmd) >> _CMD_FLAGSSHIFT) & _CMD_FLAGSMASK)
  75 #define _CMD_VTYPE(cmd)          (((cmd) >> _CMD_VTYPESHIFT) & _CMD_VTYPEMASK)
  76 #define _CMD_N(cmd)              (((cmd) >> _CMD_NSHIFT) & _CMD_NMASK)
  77
  78 enum vnic_devcmd_cmd {
  79         CMD_NONE                = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_NONE, 0),
  80
  81         /* mcpu fw info in mem: (u64)a0=paddr to struct vnic_devcmd_fw_info */
  82         CMD_MCPU_FW_INFO        = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 1),
  83
  84         /* dev-specific block member:
  85          *    in: (u16)a0=offset,(u8)a1=size
  86          *    out: a0=value */
  87         CMD_DEV_SPEC            = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 2),
  88
  89         /* stats clear */
  90         CMD_STATS_CLEAR         = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 3),
  91
  92         /* stats dump in mem: (u64)a0=paddr to stats area,
  93          *                    (u16)a1=sizeof stats area */
  94         CMD_STATS_DUMP          = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 4),
  95
  96         /* set Rx packet filter: (u32)a0=filters (see CMD_PFILTER_*) */
  97         CMD_PACKET_FILTER       = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 7),
  98
  99         /* hang detection notification */
 100         CMD_HANG_NOTIFY         = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 8),
 101
 102         /* MAC address in (u48)a0 */
 103         CMD_MAC_ADDR            = _CMDC(_CMD_DIR_READ,
 104                                         _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 9),
 105
 106         /* disable/enable promisc mode: (u8)a0=0/1 */
 107 /***** XXX DEPRECATED *****/
 108         CMD_PROMISC_MODE        = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 10),
 109
 110         /* disable/enable all-multi mode: (u8)a0=0/1 */
 111 /***** XXX DEPRECATED *****/
 112         CMD_ALLMULTI_MODE       = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 11),
 113
 114         /* add addr from (u48)a0 */
 115         CMD_ADDR_ADD            = _CMDCNW(_CMD_DIR_WRITE,
 116                                         _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 12),
 117
 118         /* del addr from (u48)a0 */
 119         CMD_ADDR_DEL            = _CMDCNW(_CMD_DIR_WRITE,
 120                                         _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 13),
 121
 122         /* add VLAN id in (u16)a0 */
 123         CMD_VLAN_ADD            = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 14),
 124
 125         /* del VLAN id in (u16)a0 */
 126         CMD_VLAN_DEL            = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 15),
 127
 128         /* nic_cfg in (u32)a0 */
 129         CMD_NIC_CFG             = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 16),
 130
 131         /* union vnic_rss_key in mem: (u64)a0=paddr, (u16)a1=len */
 132         CMD_RSS_KEY             = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 17),
 133
 134         /* union vnic_rss_cpu in mem: (u64)a0=paddr, (u16)a1=len */
 135         CMD_RSS_CPU             = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 18),
 136
 137         /* initiate softreset */
 138         CMD_SOFT_RESET          = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 19),
 139
 140         /* softreset status:
 141          *    out: a0=0 reset complete, a0=1 reset in progress */
 142         CMD_SOFT_RESET_STATUS   = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 20),
 143
 144         /* set struct vnic_devcmd_notify buffer in mem:
 145          * in:
 146          *   (u64)a0=paddr to notify (set paddr=0 to unset)
 147          *   (u32)a1 & 0x00000000ffffffff=sizeof(struct vnic_devcmd_notify)
 148          *   (u16)a1 & 0x0000ffff00000000=intr num (-1 for no intr)
 149          * out:
 150          *   (u32)a1 = effective size
 151          */
 152         CMD_NOTIFY              = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 21),
 153
 154         /* UNDI API: (u64)a0=paddr to s_PXENV_UNDI_ struct,
 155          *           (u8)a1=PXENV_UNDI_xxx */
 156         CMD_UNDI                = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 22),
 157
 158         /* initiate open sequence (u32)a0=flags (see CMD_OPENF_*) */
 159         CMD_OPEN                = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 23),
 160
 161         /* open status:
 162          *    out: a0=0 open complete, a0=1 open in progress */
 163         CMD_OPEN_STATUS         = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 24),
 164
 165         /* close vnic */
 166         CMD_CLOSE               = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 25),
 167
 168         /* initialize virtual link: (u32)a0=flags (see CMD_INITF_*) */
 169         CMD_INIT                = _CMDCNW(_CMD_DIR_READ, _CMD_VTYPE_ALL, 26),
 170
 171         /* variant of CMD_INIT, with provisioning info
 172          *     (u64)a0=paddr of vnic_devcmd_provinfo
 173          *     (u32)a1=sizeof provision info
 174          */
 175         CMD_INIT_PROV_INFO      = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 27),
 176
 177         /* enable virtual link */
 178         CMD_ENABLE              = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 28),
 179
 180         /* disable virtual link */
 181         CMD_DISABLE             = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 29),
 182
 183         /* stats dump all vnics on uplink in mem: (u64)a0=paddr (u32)a1=uif */
 184         CMD_STATS_DUMP_ALL      = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 30),
 185
 186         /* init status:
 187          *    out: a0=0 init complete, a0=1 init in progress
 188          *         if a0=0, a1=errno */
 189         CMD_INIT_STATUS         = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 31),
 190
 191         /* INT13 API: (u64)a0=paddr to vnic_int13_params struct
 192          *            (u8)a1=INT13_CMD_xxx */
 193         CMD_INT13               = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_FC, 32),
 194
 195         /* logical uplink enable/disable: (u64)a0: 0/1=disable/enable */
 196         CMD_LOGICAL_UPLINK      = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 33),
 197
 198         /* undo initialize of virtual link */
 199         CMD_DEINIT              = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 34),
 200
 201         /* check fw capability of a cmd:
 202          * in:  (u32)a0=cmd
 203          * out: (u32)a0=errno, 0:valid cmd, a1=supported VNIC_STF_* bits */
 204         CMD_CAPABILITY      = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 36),
 205
 206         /* persistent binding info
 207          * in:  (u64)a0=paddr of arg
 208          *      (u32)a1=CMD_PERBI_XXX */
 209         CMD_PERBI       = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_FC, 37),
 210
 211         /* Interrupt Assert Register functionality
 212          * in: (u16)a0=interrupt number to assert
 213          */
 214         CMD_IAR         = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 38),
 215
 216         /* initiate hangreset, like softreset after hang detected */
 217         CMD_HANG_RESET      = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 39),
 218
 219         /* hangreset status:
 220          *    out: a0=0 reset complete, a0=1 reset in progress */
 221         CMD_HANG_RESET_STATUS   = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 40),
 222
 223         /*
 224          * Set hw ingress packet vlan rewrite mode:
 225          * in:  (u32)a0=new vlan rewrite mode
 226          * out: (u32)a0=old vlan rewrite mode */
 227         CMD_IG_VLAN_REWRITE_MODE = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ENET, 41),
 228
 229         /*
 230          * in:  (u16)a0=bdf of target vnic
 231          *      (u32)a1=cmd to proxy
 232          *      a2-a15=args to cmd in a1
 233          * out: (u32)a0=status of proxied cmd
 234          *      a1-a15=out args of proxied cmd */
 235         CMD_PROXY_BY_BDF =  _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 42),
 236
 237         /*
 238          * As for BY_BDF except a0 is index of hvnlink subordinate vnic
 239          * or SR-IOV virtual vnic
 240          */
 241         CMD_PROXY_BY_INDEX =    _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 43),
 242
 243         /*
 244          * For HPP toggle:
 245          * adapter-info-get
 246          * in:  (u64)a0=phsical address of buffer passed in from caller.
 247          *      (u16)a1=size of buffer specified in a0.
 248          * out: (u64)a0=phsical address of buffer passed in from caller.
 249          *      (u16)a1=actual bytes from VIF-CONFIG-INFO TLV, or
 250          *              0 if no VIF-CONFIG-INFO TLV was ever received. */
 251         CMD_CONFIG_INFO_GET = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 44),
 252
 253         /*
 254          * INT13 API: (u64)a0=paddr to vnic_int13_params struct
 255          *            (u32)a1=INT13_CMD_xxx
 256          */
 257         CMD_INT13_ALL = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 45),
 258
 259         /*
 260          * Set default vlan:
 261          * in: (u16)a0=new default vlan
 262          *     (u16)a1=zero for overriding vlan with param a0,
 263          *             non-zero for resetting vlan to the default
 264          * out: (u16)a0=old default vlan
 265          */
 266         CMD_SET_DEFAULT_VLAN = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 46),
 267
 268         /* init_prov_info2:
 269          * Variant of CMD_INIT_PROV_INFO, where it will not try to enable
 270          * the vnic until CMD_ENABLE2 is issued.
 271          *     (u64)a0=paddr of vnic_devcmd_provinfo
 272          *     (u32)a1=sizeof provision info
 273          */
 274         CMD_INIT_PROV_INFO2  = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 47),
 275
 276         /* enable2:
 277          *      (u32)a0=0                  ==> standby
 278          *             =CMD_ENABLE2_ACTIVE ==> active
 279          */
 280         CMD_ENABLE2 = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 48),
 281
 282         /*
 283          * cmd_status:
 284          *     Returns the status of the specified command
 285          * Input:
 286          *     a0 = command for which status is being queried.
 287          *          Possible values are:
 288          *              CMD_SOFT_RESET
 289          *              CMD_HANG_RESET
 290          *              CMD_OPEN
 291          *              CMD_INIT
 292          *              CMD_INIT_PROV_INFO
 293          *              CMD_DEINIT
 294          *              CMD_INIT_PROV_INFO2
 295          *              CMD_ENABLE2
 296          * Output:
 297          *     if status == STAT_ERROR
 298          *        a0 = ERR_ENOTSUPPORTED - status for command in a0 is
 299          *                                 not supported
 300          *     if status == STAT_NONE
 301          *        a0 = status of the devcmd specified in a0 as follows.
 302          *             ERR_SUCCESS   - command in a0 completed successfully
 303          *             ERR_EINPROGRESS - command in a0 is still in progress
 304          */
 305         CMD_STATUS = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 49),
 306
 307         /*
 308          * Returns interrupt coalescing timer conversion factors.
 309          * After calling this devcmd, ENIC driver can convert
 310          * interrupt coalescing timer in usec into CPU cycles as follows:
 311          *
 312          *   intr_timer_cycles = intr_timer_usec * multiplier / divisor
 313          *
 314          * Interrupt coalescing timer in usecs can be be converted/obtained
 315          * from CPU cycles as follows:
 316          *
 317          *   intr_timer_usec = intr_timer_cycles * divisor / multiplier
 318          *
 319          * in: none
 320          * out: (u32)a0 = multiplier
 321          *      (u32)a1 = divisor
 322          *      (u32)a2 = maximum timer value in usec
 323          */
 324         CMD_INTR_COAL_CONVERT = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 50),
 325
 326         /*
 327          * ISCSI DUMP API:
 328          * in: (u64)a0=paddr of the param or param itself
 329          *     (u32)a1=ISCSI_CMD_xxx
 330          */
 331         CMD_ISCSI_DUMP_REQ = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 51),
 332
 333         /*
 334          * ISCSI DUMP STATUS API:
 335          * in: (u32)a0=cmd tag
 336          * in: (u32)a1=ISCSI_CMD_xxx
 337          * out: (u32)a0=cmd status
 338          */
 339         CMD_ISCSI_DUMP_STATUS = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 52),
 340
 341         /*
 342          * Subvnic migration from MQ <--> VF.
 343          * Enable the LIF migration from MQ to VF and vice versa. MQ and VF
 344          * indexes are statically bound at the time of initialization.
 345          * Based on the
 346          * direction of migration, the resources of either MQ or the VF shall
 347          * be attached to the LIF.
 348          * in:        (u32)a0=Direction of Migration
 349          *                                      0=> Migrate to VF
 350          *                                      1=> Migrate to MQ
 351          *            (u32)a1=VF index (MQ index)
 352          */
 353         CMD_MIGRATE_SUBVNIC = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 53),
 354
 355         /*
 356          * Register / Deregister the notification block for MQ subvnics
 357          * in:
 358          *   (u64)a0=paddr to notify (set paddr=0 to unset)
 359          *   (u32)a1 & 0x00000000ffffffff=sizeof(struct vnic_devcmd_notify)
 360          *   (u16)a1 & 0x0000ffff00000000=intr num (-1 for no intr)
 361          * out:
 362          *   (u32)a1 = effective size
 363          */
 364         CMD_SUBVNIC_NOTIFY = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 54),
 365
 366         /*
 367          * Set the predefined mac address as default
 368          * in:
 369          *   (u48)a0=mac addr
 370          */
 371         CMD_SET_MAC_ADDR = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 55),
 372
 373         /* Update the provisioning info of the given VIF
 374          *     (u64)a0=paddr of vnic_devcmd_provinfo
 375          *     (u32)a1=sizeof provision info
 376          */
 377         CMD_PROV_INFO_UPDATE = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 56),
 378
 379         /*
 380          * Initialization for the devcmd2 interface.
 381          * in: (u64) a0=host result buffer physical address
 382          * in: (u16) a1=number of entries in result buffer
 383          */
 384         CMD_INITIALIZE_DEVCMD2 = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 57)
 385 };
 386
 387 /* flags for CMD_OPEN */
 388 #define CMD_OPENF_OPROM         0x1     /* open coming from option rom */
 389
 390 #define CMD_OPENF_RQ_ENABLE_THEN_POST   0x2
 391
 392 /* flags for CMD_INIT */
 393 #define CMD_INITF_DEFAULT_MAC   0x1     /* init with default mac addr */
 394
 395 /* flags for CMD_PACKET_FILTER */
 396 #define CMD_PFILTER_DIRECTED            0x01
 397 #define CMD_PFILTER_MULTICAST           0x02
 398 #define CMD_PFILTER_BROADCAST           0x04
 399 #define CMD_PFILTER_PROMISCUOUS         0x08
 400 #define CMD_PFILTER_ALL_MULTICAST       0x10
 401
 402 enum vnic_devcmd_status {
 403         STAT_NONE = 0,
 404         STAT_BUSY = 1 << 0,     /* cmd in progress */
 405         STAT_ERROR = 1 << 1,    /* last cmd caused error (code in a0) */
 406 };
 407
 408 enum vnic_devcmd_error {
 409         ERR_SUCCESS = 0,
 410         ERR_EINVAL = 1,
 411         ERR_EFAULT = 2,
 412         ERR_EPERM = 3,
 413         ERR_EBUSY = 4,
 414         ERR_ECMDUNKNOWN = 5,
 415         ERR_EBADSTATE = 6,
 416         ERR_ENOMEM = 7,
 417         ERR_ETIMEDOUT = 8,
 418         ERR_ELINKDOWN = 9,
 419 };
 420
 421 struct vnic_devcmd_fw_info {
 422         char fw_version[32];
 423         char fw_build[32];
 424         char hw_version[32];
 425         char hw_serial_number[32];
 426 };
 427
 428 struct vnic_devcmd_notify {
 429         u32 csum;               /* checksum over following words */
 430
 431         u32 link_state;         /* link up == 1 */
 432         u32 port_speed;         /* effective port speed (rate limit) */
 433         u32 mtu;                /* MTU */
 434         u32 msglvl;             /* requested driver msg lvl */
 435         u32 uif;                /* uplink interface */
 436         u32 status;             /* status bits (see VNIC_STF_*) */
 437         u32 error;              /* error code (see ERR_*) for first ERR */
 438         u32 link_down_cnt;      /* running count of link down transitions */
 439 };
 440 #define VNIC_STF_FATAL_ERR      0x0001  /* fatal fw error */
 441
 442 struct vnic_devcmd_provinfo {
 443         u8 oui[3];
 444         u8 type;
 445         u8 data[0];
 446 };
 447
 448 /*
 449  * Writing cmd register causes STAT_BUSY to get set in status register.
 450  * When cmd completes, STAT_BUSY will be cleared.
 451  *
 452  * If cmd completed successfully STAT_ERROR will be clear
 453  * and args registers contain cmd-specific results.
 454  *
 455  * If cmd error, STAT_ERROR will be set and args[0] contains error code.
 456  *
 457  * status register is read-only.  While STAT_BUSY is set,
 458  * all other register contents are read-only.
 459  */
 460
 461 /* Make sizeof(vnic_devcmd) a power-of-2 for I/O BAR. */
 462 #define VNIC_DEVCMD_NARGS 15
 463 struct vnic_devcmd {
 464         u32 status;                     /* RO */
 465         u32 cmd;                        /* RW */
 466         u64 args[VNIC_DEVCMD_NARGS];    /* RW cmd args (little-endian) */
 467 };
 468
 469 /*
 470  * Version 2 of the interface.
 471  *
 472  * Some things are carried over, notably the vnic_devcmd_cmd enum.
 473  */
 474
 475 /*
 476  * Flags for vnic_devcmd2.flags
 477  */
 478
 479 #define DEVCMD2_FNORESULT       0x1 /* Don't copy result to host */
 480
 481 #define VNIC_DEVCMD2_NARGS                      VNIC_DEVCMD_NARGS
 482
 483 struct vnic_devcmd2 {
 484         u16 pad;
 485         u16 flags;
 486         u32 cmd;                /* same command #defines as original */
 487         u64 args[VNIC_DEVCMD2_NARGS];
 488 };
 489
 490 #define VNIC_DEVCMD2_NRESULTS                   VNIC_DEVCMD_NARGS
 491 struct devcmd2_result {
 492         u64 results[VNIC_DEVCMD2_NRESULTS];
 493         u32 pad;
 494         u16 completed_index;    /* into copy WQ */
 495         u8  error;              /* same error codes as original */
 496         u8  color;              /* 0 or 1 as with completion queues */
 497 };
 498
 499 #define DEVCMD2_RING_SIZE                       32
 500 #define DEVCMD2_DESC_SIZE                       128
 501
 502 #define DEVCMD2_RESULTS_SIZE_MAX                ((1 << 16) - 1)
 503
 504 #endif /* _VNIC_DEVCMD_H_ */