drivers/scsi/snic/vnic_devcmd.h

   1 /*
   2  * Copyright 2014 Cisco Systems, Inc.  All rights reserved.
   3  *
   4  * This program is free software; you may redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   9  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  10  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  11  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  12  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  13  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  14  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  15  * SOFTWARE.
  16  */
  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         /* nic_cfg in (u32)a0 */
  97         CMD_NIC_CFG             = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 16),
  98
  99         /* set struct vnic_devcmd_notify buffer in mem:
 100          * in:
 101          *   (u64)a0=paddr to notify (set paddr=0 to unset)
 102          *   (u32)a1 & 0x00000000ffffffff=sizeof(struct vnic_devcmd_notify)
 103          *   (u16)a1 & 0x0000ffff00000000=intr num (-1 for no intr)
 104          * out:
 105          *   (u32)a1 = effective size
 106          */
 107         CMD_NOTIFY              = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 21),
 108
 109         /* initiate open sequence (u32)a0=flags (see CMD_OPENF_*) */
 110         CMD_OPEN                = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 23),
 111
 112         /* open status:
 113          *    out: a0=0 open complete, a0=1 open in progress */
 114         CMD_OPEN_STATUS         = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 24),
 115
 116         /* close vnic */
 117         CMD_CLOSE               = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 25),
 118
 119         /* initialize virtual link: (u32)a0=flags (see CMD_INITF_*) */
 120         CMD_INIT                = _CMDCNW(_CMD_DIR_READ, _CMD_VTYPE_ALL, 26),
 121
 122         /* enable virtual link */
 123         CMD_ENABLE              = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 28),
 124
 125         /* enable virtual link, waiting variant. */
 126         CMD_ENABLE_WAIT         = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 28),
 127
 128         /* disable virtual link */
 129         CMD_DISABLE             = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 29),
 130
 131         /* stats dump all vnics on uplink in mem: (u64)a0=paddr (u32)a1=uif */
 132         CMD_STATS_DUMP_ALL      = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 30),
 133
 134         /* init status:
 135          *    out: a0=0 init complete, a0=1 init in progress
 136          *         if a0=0, a1=errno */
 137         CMD_INIT_STATUS         = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 31),
 138
 139         /* undo initialize of virtual link */
 140         CMD_DEINIT              = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 34),
 141
 142         /* check fw capability of a cmd:
 143          * in:  (u32)a0=cmd
 144          * out: (u32)a0=errno, 0:valid cmd, a1=supported VNIC_STF_* bits */
 145         CMD_CAPABILITY      = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 36),
 146
 147         /*
 148          * Initialization for the devcmd2 interface.
 149          * in: (u64) a0=host result buffer physical address
 150          * in: (u16) a1=number of entries in result buffer
 151          */
 152         CMD_INITIALIZE_DEVCMD2 = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 57)
 153 };
 154
 155 /* flags for CMD_OPEN */
 156 #define CMD_OPENF_OPROM         0x1     /* open coming from option rom */
 157
 158 /* flags for CMD_INIT */
 159 #define CMD_INITF_DEFAULT_MAC   0x1     /* init with default mac addr */
 160
 161 /* flags for CMD_PACKET_FILTER */
 162 #define CMD_PFILTER_DIRECTED            0x01
 163 #define CMD_PFILTER_MULTICAST           0x02
 164 #define CMD_PFILTER_BROADCAST           0x04
 165 #define CMD_PFILTER_PROMISCUOUS         0x08
 166 #define CMD_PFILTER_ALL_MULTICAST       0x10
 167
 168 enum vnic_devcmd_status {
 169         STAT_NONE = 0,
 170         STAT_BUSY = 1 << 0,     /* cmd in progress */
 171         STAT_ERROR = 1 << 1,    /* last cmd caused error (code in a0) */
 172 };
 173
 174 enum vnic_devcmd_error {
 175         ERR_SUCCESS = 0,
 176         ERR_EINVAL = 1,
 177         ERR_EFAULT = 2,
 178         ERR_EPERM = 3,
 179         ERR_EBUSY = 4,
 180         ERR_ECMDUNKNOWN = 5,
 181         ERR_EBADSTATE = 6,
 182         ERR_ENOMEM = 7,
 183         ERR_ETIMEDOUT = 8,
 184         ERR_ELINKDOWN = 9,
 185 };
 186
 187 struct vnic_devcmd_fw_info {
 188         char fw_version[32];
 189         char fw_build[32];
 190         char hw_version[32];
 191         char hw_serial_number[32];
 192 };
 193
 194 struct vnic_devcmd_notify {
 195         u32 csum;               /* checksum over following words */
 196
 197         u32 link_state;         /* link up == 1 */
 198         u32 port_speed;         /* effective port speed (rate limit) */
 199         u32 mtu;                /* MTU */
 200         u32 msglvl;             /* requested driver msg lvl */
 201         u32 uif;                /* uplink interface */
 202         u32 status;             /* status bits (see VNIC_STF_*) */
 203         u32 error;              /* error code (see ERR_*) for first ERR */
 204         u32 link_down_cnt;      /* running count of link down transitions */
 205 };
 206 #define VNIC_STF_FATAL_ERR      0x0001  /* fatal fw error */
 207
 208 struct vnic_devcmd_provinfo {
 209         u8 oui[3];
 210         u8 type;
 211         u8 data[0];
 212 };
 213
 214 /*
 215  * Writing cmd register causes STAT_BUSY to get set in status register.
 216  * When cmd completes, STAT_BUSY will be cleared.
 217  *
 218  * If cmd completed successfully STAT_ERROR will be clear
 219  * and args registers contain cmd-specific results.
 220  *
 221  * If cmd error, STAT_ERROR will be set and args[0] contains error code.
 222  *
 223  * status register is read-only.  While STAT_BUSY is set,
 224  * all other register contents are read-only.
 225  */
 226
 227 /* Make sizeof(vnic_devcmd) a power-of-2 for I/O BAR. */
 228 #define VNIC_DEVCMD_NARGS 15
 229 struct vnic_devcmd {
 230         u32 status;                     /* RO */
 231         u32 cmd;                        /* RW */
 232         u64 args[VNIC_DEVCMD_NARGS];    /* RW cmd args (little-endian) */
 233 };
 234
 235
 236 /*
 237  * Version 2 of the interface.
 238  *
 239  * Some things are carried over, notably the vnic_devcmd_cmd enum.
 240  */
 241
 242 /*
 243  * Flags for vnic_devcmd2.flags
 244  */
 245
 246 #define DEVCMD2_FNORESULT       0x1     /* Don't copy result to host */
 247
 248 #define VNIC_DEVCMD2_NARGS      VNIC_DEVCMD_NARGS
 249 struct vnic_devcmd2 {
 250         u16 pad;
 251         u16 flags;
 252         u32 cmd;                /* same command #defines as original */
 253         u64 args[VNIC_DEVCMD2_NARGS];
 254 };
 255
 256 #define VNIC_DEVCMD2_NRESULTS   VNIC_DEVCMD_NARGS
 257 struct devcmd2_result {
 258         u64 results[VNIC_DEVCMD2_NRESULTS];
 259         u32 pad;
 260         u16 completed_index;    /* into copy WQ */
 261         u8  error;              /* same error codes as original */
 262         u8  color;              /* 0 or 1 as with completion queues */
 263 };
 264
 265 #define DEVCMD2_RING_SIZE   32
 266 #define DEVCMD2_DESC_SIZE   128
 267
 268 #define DEVCMD2_RESULTS_SIZE_MAX   ((1 << 16) - 1)
 269
 270 #endif /* _VNIC_DEVCMD_H_ */