1/*
2 * SCSI target kernel/user interface
3 *
4 * Copyright (C) 2005 FUJITA Tomonori <tomof@acm.org>
5 * Copyright (C) 2005 Mike Christie <michaelc@cs.wisc.edu>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of the
10 * License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 */
22#ifndef __SCSI_TARGET_IF_H
23#define __SCSI_TARGET_IF_H
24
25/* user -> kernel */
26#define	TGT_UEVENT_CMD_RSP	0x0001
27#define	TGT_UEVENT_TSK_MGMT_RSP	0x0002
28
29/* kernel -> user */
30#define	TGT_KEVENT_CMD_REQ	0x1001
31#define	TGT_KEVENT_CMD_DONE	0x1002
32#define	TGT_KEVENT_TSK_MGMT_REQ	0x1003
33
34struct tgt_event_hdr {
35	uint16_t version;
36	uint16_t status;
37	uint16_t type;
38	uint16_t len;
39} __attribute__ ((aligned (sizeof(uint64_t))));
40
41struct tgt_event {
42	struct tgt_event_hdr hdr;
43
44	union {
45		/* user-> kernel */
46		struct {
47			int host_no;
48			int result;
49			aligned_u64 tag;
50			aligned_u64 uaddr;
51			aligned_u64 sense_uaddr;
52			uint32_t len;
53			uint32_t sense_len;
54			uint8_t rw;
55		} cmd_rsp;
56		struct {
57			int host_no;
58			aligned_u64 mid;
59			int result;
60		} tsk_mgmt_rsp;
61
62
63		/* kernel -> user */
64		struct {
65			int host_no;
66			uint32_t data_len;
67			uint8_t scb[16];
68			uint8_t lun[8];
69			int attribute;
70			aligned_u64 tag;
71		} cmd_req;
72		struct {
73			int host_no;
74			aligned_u64 tag;
75			int result;
76		} cmd_done;
77		struct {
78			int host_no;
79			int function;
80			aligned_u64 tag;
81			uint8_t lun[8];
82			aligned_u64 mid;
83		} tsk_mgmt_req;
84	} p;
85} __attribute__ ((aligned (sizeof(uint64_t))));
86
87#define TGT_RING_SIZE (1UL << 16)
88
89#endif
90