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/* $OpenBSD: viovar.h,v 1.1 2009/01/10 20:32:37 kettenis Exp $ */
/*
* Copyright (c) 2009 Mark Kettenis
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Virtual IO device protocol.
*/
struct vio_msg_tag {
uint8_t type;
uint8_t stype;
uint16_t stype_env;
uint32_t sid;
};
struct vio_msg {
uint64_t hdr;
uint8_t type;
uint8_t stype;
uint16_t stype_env;
uint32_t sid;
uint16_t major;
uint16_t minor;
uint8_t dev_class;
};
/* Message types. */
#define VIO_TYPE_CTRL 0x01
#define VIO_TYPE_DATA 0x02
#define VIO_TYPE_ERR 0x04
/* Sub-Message types. */
#define VIO_SUBTYPE_INFO 0x01
#define VIO_SUBTYPE_ACK 0x02
#define VIO_SUBTYPE_NACK 0x04
/* Sub-Type envelopes. */
#define VIO_VER_INFO 0x0001
#define VIO_ATTR_INFO 0x0002
#define VIO_DRING_REG 0x0003
#define VIO_DRING_UNREG 0x0004
#define VIO_RDX 0x0005
#define VIO_PKT_DATA 0x0040
#define VIO_DESC_DATA 0x0041
#define VIO_DRING_DATA 0x0042
struct vio_ver_info {
struct vio_msg_tag tag;
uint16_t major;
uint16_t minor;
uint8_t dev_class;
};
/* Device types. */
#define VDEV_NETWORK 0x01
#define VDEV_NETWORK_SWITCH 0x02
#define VDEV_DISK 0x03
#define VDEV_DISK_SERVER 0x04
struct vio_dring_reg {
struct vio_msg_tag tag;
uint64_t dring_ident;
uint32_t num_descriptors;
uint32_t descriptor_size;
uint16_t options;
uint16_t _reserved;
uint32_t ncookies;
struct ldc_cookie cookie[1];
};
/* Ring options. */
#define VIO_TX_RING 0x0001
#define VIO_RX_RING 0x0002
/* Transfer modes. */
#define VIO_PKT_MODE 0x01
#define VIO_DESC_MODE 0x02
#define VIO_DRING_MODE 0x03
struct vio_dring_hdr {
uint8_t dstate;
uint8_t ack: 1;
uint16_t _reserved[3];
};
/* Descriptor states. */
#define VIO_DESC_FREE 0x01
#define VIO_DESC_READY 0x02
#define VIO_DESC_ACCEPTED 0x03
#define VIO_DESC_DONE 0x04
struct vio_dring_msg {
struct vio_msg_tag tag;
uint64_t seq_no;
uint64_t dring_ident;
uint32_t start_idx;
uint32_t end_idx;
uint8_t proc_state;
uint8_t _reserved[7];
};
/* Ring states. */
#define VIO_DP_ACTIVE 0x01
#define VIO_DP_STOPPED 0x02
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