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7e05484f BV |
1 | /* |
2 | * This header is BSD licensed so anyone can use the definitions to implement | |
3 | * compatible drivers/servers. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * | |
14 | * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |
15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
17 | * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE | |
18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
24 | * SUCH DAMAGE. | |
25 | */ | |
26 | ||
4fe74b1c PB |
27 | #ifndef _LINUX_VIRTIO_SCSI_H |
28 | #define _LINUX_VIRTIO_SCSI_H | |
4fe74b1c PB |
29 | |
30 | #define VIRTIO_SCSI_CDB_SIZE 32 | |
31 | #define VIRTIO_SCSI_SENSE_SIZE 96 | |
32 | ||
33 | /* SCSI command request, followed by data-out */ | |
34 | struct virtio_scsi_cmd_req { | |
35 | u8 lun[8]; /* Logical Unit Number */ | |
36 | u64 tag; /* Command identifier */ | |
37 | u8 task_attr; /* Task attribute */ | |
38 | u8 prio; | |
39 | u8 crn; | |
40 | u8 cdb[VIRTIO_SCSI_CDB_SIZE]; | |
41 | } __packed; | |
42 | ||
43 | /* Response, followed by sense data and data-in */ | |
44 | struct virtio_scsi_cmd_resp { | |
45 | u32 sense_len; /* Sense data length */ | |
46 | u32 resid; /* Residual bytes in data buffer */ | |
47 | u16 status_qualifier; /* Status qualifier */ | |
48 | u8 status; /* Command completion status */ | |
49 | u8 response; /* Response values */ | |
50 | u8 sense[VIRTIO_SCSI_SENSE_SIZE]; | |
51 | } __packed; | |
52 | ||
53 | /* Task Management Request */ | |
54 | struct virtio_scsi_ctrl_tmf_req { | |
55 | u32 type; | |
56 | u32 subtype; | |
57 | u8 lun[8]; | |
58 | u64 tag; | |
59 | } __packed; | |
60 | ||
61 | struct virtio_scsi_ctrl_tmf_resp { | |
62 | u8 response; | |
63 | } __packed; | |
64 | ||
65 | /* Asynchronous notification query/subscription */ | |
66 | struct virtio_scsi_ctrl_an_req { | |
67 | u32 type; | |
68 | u8 lun[8]; | |
69 | u32 event_requested; | |
70 | } __packed; | |
71 | ||
72 | struct virtio_scsi_ctrl_an_resp { | |
73 | u32 event_actual; | |
74 | u8 response; | |
75 | } __packed; | |
76 | ||
77 | struct virtio_scsi_event { | |
78 | u32 event; | |
79 | u8 lun[8]; | |
80 | u32 reason; | |
81 | } __packed; | |
82 | ||
83 | struct virtio_scsi_config { | |
84 | u32 num_queues; | |
85 | u32 seg_max; | |
86 | u32 max_sectors; | |
87 | u32 cmd_per_lun; | |
88 | u32 event_info_size; | |
89 | u32 sense_size; | |
90 | u32 cdb_size; | |
91 | u16 max_channel; | |
92 | u16 max_target; | |
93 | u32 max_lun; | |
94 | } __packed; | |
95 | ||
365a7150 CM |
96 | /* Feature Bits */ |
97 | #define VIRTIO_SCSI_F_INOUT 0 | |
98 | #define VIRTIO_SCSI_F_HOTPLUG 1 | |
865b58c0 | 99 | #define VIRTIO_SCSI_F_CHANGE 2 |
365a7150 | 100 | |
4fe74b1c PB |
101 | /* Response codes */ |
102 | #define VIRTIO_SCSI_S_OK 0 | |
103 | #define VIRTIO_SCSI_S_OVERRUN 1 | |
104 | #define VIRTIO_SCSI_S_ABORTED 2 | |
105 | #define VIRTIO_SCSI_S_BAD_TARGET 3 | |
106 | #define VIRTIO_SCSI_S_RESET 4 | |
107 | #define VIRTIO_SCSI_S_BUSY 5 | |
108 | #define VIRTIO_SCSI_S_TRANSPORT_FAILURE 6 | |
109 | #define VIRTIO_SCSI_S_TARGET_FAILURE 7 | |
110 | #define VIRTIO_SCSI_S_NEXUS_FAILURE 8 | |
111 | #define VIRTIO_SCSI_S_FAILURE 9 | |
112 | #define VIRTIO_SCSI_S_FUNCTION_SUCCEEDED 10 | |
113 | #define VIRTIO_SCSI_S_FUNCTION_REJECTED 11 | |
114 | #define VIRTIO_SCSI_S_INCORRECT_LUN 12 | |
115 | ||
116 | /* Controlq type codes. */ | |
117 | #define VIRTIO_SCSI_T_TMF 0 | |
118 | #define VIRTIO_SCSI_T_AN_QUERY 1 | |
119 | #define VIRTIO_SCSI_T_AN_SUBSCRIBE 2 | |
120 | ||
121 | /* Valid TMF subtypes. */ | |
122 | #define VIRTIO_SCSI_T_TMF_ABORT_TASK 0 | |
123 | #define VIRTIO_SCSI_T_TMF_ABORT_TASK_SET 1 | |
124 | #define VIRTIO_SCSI_T_TMF_CLEAR_ACA 2 | |
125 | #define VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET 3 | |
126 | #define VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET 4 | |
127 | #define VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET 5 | |
128 | #define VIRTIO_SCSI_T_TMF_QUERY_TASK 6 | |
129 | #define VIRTIO_SCSI_T_TMF_QUERY_TASK_SET 7 | |
130 | ||
131 | /* Events. */ | |
132 | #define VIRTIO_SCSI_T_EVENTS_MISSED 0x80000000 | |
133 | #define VIRTIO_SCSI_T_NO_EVENT 0 | |
134 | #define VIRTIO_SCSI_T_TRANSPORT_RESET 1 | |
135 | #define VIRTIO_SCSI_T_ASYNC_NOTIFY 2 | |
865b58c0 | 136 | #define VIRTIO_SCSI_T_PARAM_CHANGE 3 |
4fe74b1c | 137 | |
365a7150 CM |
138 | /* Reasons of transport reset event */ |
139 | #define VIRTIO_SCSI_EVT_RESET_HARD 0 | |
140 | #define VIRTIO_SCSI_EVT_RESET_RESCAN 1 | |
141 | #define VIRTIO_SCSI_EVT_RESET_REMOVED 2 | |
142 | ||
4fe74b1c PB |
143 | #define VIRTIO_SCSI_S_SIMPLE 0 |
144 | #define VIRTIO_SCSI_S_ORDERED 1 | |
145 | #define VIRTIO_SCSI_S_HEAD 2 | |
146 | #define VIRTIO_SCSI_S_ACA 3 | |
147 | ||
148 | ||
149 | #endif /* _LINUX_VIRTIO_SCSI_H */ |