vnic_devcmd.h

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/*
 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#ifndef _VNIC_DEVCMD_H_
#define _VNIC_DEVCMD_H_

#define _CMD_NBITS      14
#define _CMD_VTYPEBITS  10
#define _CMD_FLAGSBITS  6
#define _CMD_DIRBITS    2

#define _CMD_NMASK      ((1 << _CMD_NBITS)-1)
#define _CMD_VTYPEMASK  ((1 << _CMD_VTYPEBITS)-1)
#define _CMD_FLAGSMASK  ((1 << _CMD_FLAGSBITS)-1)
#define _CMD_DIRMASK    ((1 << _CMD_DIRBITS)-1)

#define _CMD_NSHIFT     0
#define _CMD_VTYPESHIFT (_CMD_NSHIFT+_CMD_NBITS)
#define _CMD_FLAGSSHIFT (_CMD_VTYPESHIFT+_CMD_VTYPEBITS)
#define _CMD_DIRSHIFT   (_CMD_FLAGSSHIFT+_CMD_FLAGSBITS)

/*
 * Direction bits (from host perspective).
 */
#define _CMD_DIR_NONE   0U
#define _CMD_DIR_WRITE  1U
#define _CMD_DIR_READ   2U
#define _CMD_DIR_RW     (_CMD_DIR_WRITE | _CMD_DIR_READ)

/*
 * Flag bits.
 */
#define _CMD_FLAGS_NONE 0U
#define _CMD_FLAGS_NOWAIT 1U

/*
 * vNIC type bits.
 */
#define _CMD_VTYPE_NONE  0U
#define _CMD_VTYPE_ENET  1U
#define _CMD_VTYPE_FC    2U
#define _CMD_VTYPE_SCSI  4U
#define _CMD_VTYPE_ALL   (_CMD_VTYPE_ENET | _CMD_VTYPE_FC | _CMD_VTYPE_SCSI)

/*
 * Used to create cmds..
*/
#define _CMDCF(dir, flags, vtype, nr)  \
    (((dir)   << _CMD_DIRSHIFT) | \
    ((flags) << _CMD_FLAGSSHIFT) | \
    ((vtype) << _CMD_VTYPESHIFT) | \
    ((nr)    << _CMD_NSHIFT))
#define _CMDC(dir, vtype, nr)    _CMDCF(dir, 0, vtype, nr)
#define _CMDCNW(dir, vtype, nr)  _CMDCF(dir, _CMD_FLAGS_NOWAIT, vtype, nr)

/*
 * Used to decode cmds..
*/
#define _CMD_DIR(cmd)            (((cmd) >> _CMD_DIRSHIFT) & _CMD_DIRMASK)
#define _CMD_FLAGS(cmd)          (((cmd) >> _CMD_FLAGSSHIFT) & _CMD_FLAGSMASK)
#define _CMD_VTYPE(cmd)          (((cmd) >> _CMD_VTYPESHIFT) & _CMD_VTYPEMASK)
#define _CMD_N(cmd)              (((cmd) >> _CMD_NSHIFT) & _CMD_NMASK)

enum vnic_devcmd_cmd {
    CMD_NONE                = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_NONE, 0),

    /* mcpu fw info in mem: (u64)a0=paddr to struct vnic_devcmd_fw_info */
    CMD_MCPU_FW_INFO        = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 1),

    /* dev-specific block member:
     *    in: (u16)a0=offset,(u8)a1=size
     *    out: a0=value */
    CMD_DEV_SPEC            = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 2),

    /* stats clear */
    CMD_STATS_CLEAR         = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 3),

    /* stats dump in mem: (u64)a0=paddr to stats area,
     *                    (u16)a1=sizeof stats area */
    CMD_STATS_DUMP          = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 4),

    /* set Rx packet filter: (u32)a0=filters (see CMD_PFILTER_*) */
    CMD_PACKET_FILTER       = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 7),

    /* hang detection notification */
    CMD_HANG_NOTIFY         = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 8),

    /* MAC address in (u48)a0 */
    CMD_MAC_ADDR            = _CMDC(_CMD_DIR_READ,
                    _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 9),

    /* disable/enable promisc mode: (u8)a0=0/1 */
/***** XXX DEPRECATED *****/
    CMD_PROMISC_MODE        = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 10),

    /* disable/enable all-multi mode: (u8)a0=0/1 */
/***** XXX DEPRECATED *****/
    CMD_ALLMULTI_MODE       = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 11),

    /* add addr from (u48)a0 */
    CMD_ADDR_ADD            = _CMDCNW(_CMD_DIR_WRITE,
                    _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 12),

    /* del addr from (u48)a0 */
    CMD_ADDR_DEL            = _CMDCNW(_CMD_DIR_WRITE,
                    _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 13),

    /* add VLAN id in (u16)a0 */
    CMD_VLAN_ADD            = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 14),

    /* del VLAN id in (u16)a0 */
    CMD_VLAN_DEL            = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 15),

    /* nic_cfg in (u32)a0 */
    CMD_NIC_CFG             = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 16),

    /* union vnic_rss_key in mem: (u64)a0=paddr, (u16)a1=len */
    CMD_RSS_KEY             = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 17),

    /* union vnic_rss_cpu in mem: (u64)a0=paddr, (u16)a1=len */
    CMD_RSS_CPU             = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 18),

    /* initiate softreset */
    CMD_SOFT_RESET          = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 19),

    /* softreset status:
     *    out: a0=0 reset complete, a0=1 reset in progress */
    CMD_SOFT_RESET_STATUS   = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 20),

    /* set struct vnic_devcmd_notify buffer in mem:
     * in:
     *   (u64)a0=paddr to notify (set paddr=0 to unset)
     *   (u32)a1 & 0x00000000ffffffff=sizeof(struct vnic_devcmd_notify)
     *   (u16)a1 & 0x0000ffff00000000=intr num (-1 for no intr)
     * out:
     *   (u32)a1 = effective size
     */
    CMD_NOTIFY              = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 21),

    /* UNDI API: (u64)a0=paddr to s_PXENV_UNDI_ struct,
     *           (u8)a1=PXENV_UNDI_xxx */
    CMD_UNDI                = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 22),

    /* initiate open sequence (u32)a0=flags (see CMD_OPENF_*) */
    CMD_OPEN        = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 23),

    /* open status:
     *    out: a0=0 open complete, a0=1 open in progress */
    CMD_OPEN_STATUS     = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 24),

    /* close vnic */
    CMD_CLOSE       = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 25),

    /* initialize virtual link: (u32)a0=flags (see CMD_INITF_*) */
    CMD_INIT        = _CMDCNW(_CMD_DIR_READ, _CMD_VTYPE_ALL, 26),

    /* variant of CMD_INIT, with provisioning info
     *     (u64)a0=paddr of vnic_devcmd_provinfo
     *     (u32)a1=sizeof provision info */
    CMD_INIT_PROV_INFO  = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 27),

    /* enable virtual link */
    CMD_ENABLE      = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 28),

    /* disable virtual link */
    CMD_DISABLE     = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 29),

    /* stats dump all vnics on uplink in mem: (u64)a0=paddr (u32)a1=uif */
    CMD_STATS_DUMP_ALL  = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 30),

    /* init status:
     *    out: a0=0 init complete, a0=1 init in progress
     *         if a0=0, a1=errno */
    CMD_INIT_STATUS     = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 31),

    /* INT13 API: (u64)a0=paddr to vnic_int13_params struct
     *            (u8)a1=INT13_CMD_xxx */
    CMD_INT13               = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_FC, 32),

    /* logical uplink enable/disable: (u64)a0: 0/1=disable/enable */
    CMD_LOGICAL_UPLINK      = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 33),

    /* undo initialize of virtual link */
    CMD_DEINIT      = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 34),
};

/* flags for CMD_OPEN */
#define CMD_OPENF_OPROM     0x1 /* open coming from option rom */

/* flags for CMD_INIT */
#define CMD_INITF_DEFAULT_MAC   0x1 /* init with default mac addr */

/* flags for CMD_PACKET_FILTER */
#define CMD_PFILTER_DIRECTED        0x01
#define CMD_PFILTER_MULTICAST       0x02
#define CMD_PFILTER_BROADCAST       0x04
#define CMD_PFILTER_PROMISCUOUS     0x08
#define CMD_PFILTER_ALL_MULTICAST   0x10

enum vnic_devcmd_status {
    STAT_NONE = 0,
    STAT_BUSY = 1 << 0, /* cmd in progress */
    STAT_ERROR = 1 << 1,    /* last cmd caused error (code in a0) */
};

enum vnic_devcmd_error {
    ERR_SUCCESS = 0,
    ERR_EINVAL = 1,
    ERR_EFAULT = 2,
    ERR_EPERM = 3,
    ERR_EBUSY = 4,
    ERR_ECMDUNKNOWN = 5,
    ERR_EBADSTATE = 6,
    ERR_ENOMEM = 7,
    ERR_ETIMEDOUT = 8,
    ERR_ELINKDOWN = 9,
};

struct vnic_devcmd_fw_info {
    char fw_version[32];
    char fw_build[32];
    char hw_version[32];
    char hw_serial_number[32];
};

struct vnic_devcmd_notify {
    u32 csum;       /* checksum over following words */

    u32 link_state;     /* link up == 1 */
    u32 port_speed;     /* effective port speed (rate limit) */
    u32 mtu;        /* MTU */
    u32 msglvl;     /* requested driver msg lvl */
    u32 uif;        /* uplink interface */
    u32 status;     /* status bits (see VNIC_STF_*) */
    u32 error;      /* error code (see ERR_*) for first ERR */
    u32 link_down_cnt;  /* running count of link down transitions */
};
#define VNIC_STF_FATAL_ERR  0x0001  /* fatal fw error */

struct vnic_devcmd_provinfo {
    u8 oui[3];
    u8 type;
    u8 data[0];
};

/*
 * Writing cmd register causes STAT_BUSY to get set in status register.
 * When cmd completes, STAT_BUSY will be cleared.
 *
 * If cmd completed successfully STAT_ERROR will be clear
 * and args registers contain cmd-specific results.
 *
 * If cmd error, STAT_ERROR will be set and args[0] contains error code.
 *
 * status register is read-only.  While STAT_BUSY is set,
 * all other register contents are read-only.
 */

/* Make sizeof(vnic_devcmd) a power-of-2 for I/O BAR. */
#define VNIC_DEVCMD_NARGS 15
struct vnic_devcmd {
    u32 status;         /* RO */
    u32 cmd;            /* RW */
    u64 args[VNIC_DEVCMD_NARGS];    /* RW cmd args (little-endian) */
};

#endif /* _VNIC_DEVCMD_H_ */