linux-headers (unknown)
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
27 #ifndef _LINUX_VIRTIO_SCSI_H
28 #define _LINUX_VIRTIO_SCSI_H
29
30 #include <linux/virtio_types.h>
31
32 /* Default values of the CDB and sense data size configuration fields */
33 #define VIRTIO_SCSI_CDB_DEFAULT_SIZE 32
34 #define VIRTIO_SCSI_SENSE_DEFAULT_SIZE 96
35
36 #ifndef VIRTIO_SCSI_CDB_SIZE
37 #define VIRTIO_SCSI_CDB_SIZE VIRTIO_SCSI_CDB_DEFAULT_SIZE
38 #endif
39 #ifndef VIRTIO_SCSI_SENSE_SIZE
40 #define VIRTIO_SCSI_SENSE_SIZE VIRTIO_SCSI_SENSE_DEFAULT_SIZE
41 #endif
42
43 /* SCSI command request, followed by data-out */
44 struct virtio_scsi_cmd_req {
45 __u8 lun[8]; /* Logical Unit Number */
46 __virtio64 tag; /* Command identifier */
47 __u8 task_attr; /* Task attribute */
48 __u8 prio; /* SAM command priority field */
49 __u8 crn;
50 __u8 cdb[VIRTIO_SCSI_CDB_SIZE];
51 } __attribute__((packed));
52
53 /* SCSI command request, followed by protection information */
54 struct virtio_scsi_cmd_req_pi {
55 __u8 lun[8]; /* Logical Unit Number */
56 __virtio64 tag; /* Command identifier */
57 __u8 task_attr; /* Task attribute */
58 __u8 prio; /* SAM command priority field */
59 __u8 crn;
60 __virtio32 pi_bytesout; /* DataOUT PI Number of bytes */
61 __virtio32 pi_bytesin; /* DataIN PI Number of bytes */
62 __u8 cdb[VIRTIO_SCSI_CDB_SIZE];
63 } __attribute__((packed));
64
65 /* Response, followed by sense data and data-in */
66 struct virtio_scsi_cmd_resp {
67 __virtio32 sense_len; /* Sense data length */
68 __virtio32 resid; /* Residual bytes in data buffer */
69 __virtio16 status_qualifier; /* Status qualifier */
70 __u8 status; /* Command completion status */
71 __u8 response; /* Response values */
72 __u8 sense[VIRTIO_SCSI_SENSE_SIZE];
73 } __attribute__((packed));
74
75 /* Task Management Request */
76 struct virtio_scsi_ctrl_tmf_req {
77 __virtio32 type;
78 __virtio32 subtype;
79 __u8 lun[8];
80 __virtio64 tag;
81 } __attribute__((packed));
82
83 struct virtio_scsi_ctrl_tmf_resp {
84 __u8 response;
85 } __attribute__((packed));
86
87 /* Asynchronous notification query/subscription */
88 struct virtio_scsi_ctrl_an_req {
89 __virtio32 type;
90 __u8 lun[8];
91 __virtio32 event_requested;
92 } __attribute__((packed));
93
94 struct virtio_scsi_ctrl_an_resp {
95 __virtio32 event_actual;
96 __u8 response;
97 } __attribute__((packed));
98
99 struct virtio_scsi_event {
100 __virtio32 event;
101 __u8 lun[8];
102 __virtio32 reason;
103 } __attribute__((packed));
104
105 struct virtio_scsi_config {
106 __virtio32 num_queues;
107 __virtio32 seg_max;
108 __virtio32 max_sectors;
109 __virtio32 cmd_per_lun;
110 __virtio32 event_info_size;
111 __virtio32 sense_size;
112 __virtio32 cdb_size;
113 __virtio16 max_channel;
114 __virtio16 max_target;
115 __virtio32 max_lun;
116 } __attribute__((packed));
117
118 /* Feature Bits */
119 #define VIRTIO_SCSI_F_INOUT 0
120 #define VIRTIO_SCSI_F_HOTPLUG 1
121 #define VIRTIO_SCSI_F_CHANGE 2
122 #define VIRTIO_SCSI_F_T10_PI 3
123
124 /* Response codes */
125 #define VIRTIO_SCSI_S_OK 0
126 #define VIRTIO_SCSI_S_OVERRUN 1
127 #define VIRTIO_SCSI_S_ABORTED 2
128 #define VIRTIO_SCSI_S_BAD_TARGET 3
129 #define VIRTIO_SCSI_S_RESET 4
130 #define VIRTIO_SCSI_S_BUSY 5
131 #define VIRTIO_SCSI_S_TRANSPORT_FAILURE 6
132 #define VIRTIO_SCSI_S_TARGET_FAILURE 7
133 #define VIRTIO_SCSI_S_NEXUS_FAILURE 8
134 #define VIRTIO_SCSI_S_FAILURE 9
135 #define VIRTIO_SCSI_S_FUNCTION_SUCCEEDED 10
136 #define VIRTIO_SCSI_S_FUNCTION_REJECTED 11
137 #define VIRTIO_SCSI_S_INCORRECT_LUN 12
138
139 /* Controlq type codes. */
140 #define VIRTIO_SCSI_T_TMF 0
141 #define VIRTIO_SCSI_T_AN_QUERY 1
142 #define VIRTIO_SCSI_T_AN_SUBSCRIBE 2
143
144 /* Valid TMF subtypes. */
145 #define VIRTIO_SCSI_T_TMF_ABORT_TASK 0
146 #define VIRTIO_SCSI_T_TMF_ABORT_TASK_SET 1
147 #define VIRTIO_SCSI_T_TMF_CLEAR_ACA 2
148 #define VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET 3
149 #define VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET 4
150 #define VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET 5
151 #define VIRTIO_SCSI_T_TMF_QUERY_TASK 6
152 #define VIRTIO_SCSI_T_TMF_QUERY_TASK_SET 7
153
154 /* Events. */
155 #define VIRTIO_SCSI_T_EVENTS_MISSED 0x80000000
156 #define VIRTIO_SCSI_T_NO_EVENT 0
157 #define VIRTIO_SCSI_T_TRANSPORT_RESET 1
158 #define VIRTIO_SCSI_T_ASYNC_NOTIFY 2
159 #define VIRTIO_SCSI_T_PARAM_CHANGE 3
160
161 /* Reasons of transport reset event */
162 #define VIRTIO_SCSI_EVT_RESET_HARD 0
163 #define VIRTIO_SCSI_EVT_RESET_RESCAN 1
164 #define VIRTIO_SCSI_EVT_RESET_REMOVED 2
165
166 #define VIRTIO_SCSI_S_SIMPLE 0
167 #define VIRTIO_SCSI_S_ORDERED 1
168 #define VIRTIO_SCSI_S_HEAD 2
169 #define VIRTIO_SCSI_S_ACA 3
170
171
172 #endif /* _LINUX_VIRTIO_SCSI_H */
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