[SCSI] scsi_transport_iscsi: added support for host event
[linux-2.6.git] / 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
36 struct 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
43 struct 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