1/*	$OpenBSD: vioscsireg.h,v 1.2 2019/03/24 18:21:12 sf Exp $	*/
2/*
3 * Copyright (c) 2013 Google Inc.
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18/* Configuration registers */
19#define VIRTIO_SCSI_CONFIG_NUM_QUEUES		0 /* 32bit */
20#define VIRTIO_SCSI_CONFIG_SEG_MAX		4 /* 32bit */
21#define VIRTIO_SCSI_CONFIG_MAX_SECTORS		8 /* 32bit */
22#define VIRTIO_SCSI_CONFIG_CMD_PER_LUN		12 /* 32bit */
23#define VIRTIO_SCSI_CONFIG_EVENT_INFO_SIZE	16 /* 32bit */
24#define VIRTIO_SCSI_CONFIG_SENSE_SIZE		20 /* 32bit */
25#define VIRTIO_SCSI_CONFIG_CDB_SIZE		24 /* 32bit */
26#define VIRTIO_SCSI_CONFIG_MAX_CHANNEL		28 /* 16bit */
27#define VIRTIO_SCSI_CONFIG_MAX_TARGET		30 /* 16bit */
28#define VIRTIO_SCSI_CONFIG_MAX_LUN		32 /* 32bit */
29
30/* Feature bits */
31#define VIRTIO_SCSI_F_INOUT			(1ULL<<0)
32#define VIRTIO_SCSI_F_HOTPLUG			(1ULL<<1)
33
34/* Response status values */
35#define VIRTIO_SCSI_S_OK			0
36#define VIRTIO_SCSI_S_OVERRUN			1
37#define VIRTIO_SCSI_S_ABORTED			2
38#define VIRTIO_SCSI_S_BAD_TARGET		3
39#define VIRTIO_SCSI_S_RESET			4
40#define VIRTIO_SCSI_S_BUSY			5
41#define VIRTIO_SCSI_S_TRANSPORT_FAILURE		6
42#define VIRTIO_SCSI_S_TARGET_FAILURE		7
43#define VIRTIO_SCSI_S_NEXUS_FAILURE		8
44#define VIRTIO_SCSI_S_FAILURE			9
45
46/* Task attributes */
47#define VIRTIO_SCSI_S_SIMPLE			0
48#define VIRTIO_SCSI_S_ORDERED			1
49#define VIRTIO_SCSI_S_HEAD			2
50#define VIRTIO_SCSI_S_ACA			3
51
52/* Request header structure */
53struct virtio_scsi_req_hdr {
54	uint8_t		lun[8];
55	uint64_t	id;
56	uint8_t		task_attr;
57	uint8_t		prio;
58	uint8_t		crn;
59	uint8_t		cdb[32];
60} __packed;
61/* Followed by data-out. */
62
63/* Response header structure */
64struct virtio_scsi_res_hdr {
65	uint32_t	sense_len;
66	uint32_t	residual;
67	uint16_t	status_qualifier;
68	uint8_t		status;
69	uint8_t		response;
70	uint8_t		sense[96];
71} __packed;
72/* Followed by data-in. */
73