Root/include/scsi/scsi_tgt_if.h

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_IT_NEXUS_RSP 0x0002
28#define TGT_UEVENT_TSK_MGMT_RSP 0x0003
29
30/* kernel -> user */
31#define TGT_KEVENT_CMD_REQ 0x1001
32#define TGT_KEVENT_CMD_DONE 0x1002
33#define TGT_KEVENT_IT_NEXUS_REQ 0x1003
34#define TGT_KEVENT_TSK_MGMT_REQ 0x1004
35
36struct tgt_event_hdr {
37    uint16_t version;
38    uint16_t status;
39    uint16_t type;
40    uint16_t len;
41} __attribute__ ((aligned (sizeof(uint64_t))));
42
43struct tgt_event {
44    struct tgt_event_hdr hdr;
45
46    union {
47        /* user-> kernel */
48        struct {
49            int host_no;
50            int result;
51            aligned_u64 itn_id;
52            aligned_u64 tag;
53            aligned_u64 uaddr;
54            aligned_u64 sense_uaddr;
55            uint32_t len;
56            uint32_t sense_len;
57            uint8_t rw;
58        } cmd_rsp;
59        struct {
60            int host_no;
61            int result;
62            aligned_u64 itn_id;
63            aligned_u64 mid;
64        } tsk_mgmt_rsp;
65        struct {
66            __s32 host_no;
67            __s32 result;
68            aligned_u64 itn_id;
69            __u32 function;
70        } it_nexus_rsp;
71
72        /* kernel -> user */
73        struct {
74            int host_no;
75            uint32_t data_len;
76            aligned_u64 itn_id;
77            uint8_t scb[16];
78            uint8_t lun[8];
79            int attribute;
80            aligned_u64 tag;
81        } cmd_req;
82        struct {
83            int host_no;
84            int result;
85            aligned_u64 itn_id;
86            aligned_u64 tag;
87        } cmd_done;
88        struct {
89            int host_no;
90            int function;
91            aligned_u64 itn_id;
92            aligned_u64 tag;
93            uint8_t lun[8];
94            aligned_u64 mid;
95        } tsk_mgmt_req;
96        struct {
97            __s32 host_no;
98            __u32 function;
99            aligned_u64 itn_id;
100            __u32 max_cmds;
101            __u8 initiator_id[16];
102        } it_nexus_req;
103    } p;
104} __attribute__ ((aligned (sizeof(uint64_t))));
105
106#define TGT_RING_SIZE (1UL << 16)
107
108#endif
109

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