2 * This header is BSD licensed so anyone can use the definitions to implement
3 * compatible drivers/servers.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
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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.
14 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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17 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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27 #ifndef _LINUX_VIRTIO_SCSI_H
28 #define _LINUX_VIRTIO_SCSI_H
30 #include <linux/virtio_types.h>
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
36 #ifndef VIRTIO_SCSI_CDB_SIZE
37 #define VIRTIO_SCSI_CDB_SIZE VIRTIO_SCSI_CDB_DEFAULT_SIZE
39 #ifndef VIRTIO_SCSI_SENSE_SIZE
40 #define VIRTIO_SCSI_SENSE_SIZE VIRTIO_SCSI_SENSE_DEFAULT_SIZE
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 */
50 __u8 cdb[VIRTIO_SCSI_CDB_SIZE];
51 } __attribute__((packed));
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 */
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));
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));
75 /* Task Management Request */
76 struct virtio_scsi_ctrl_tmf_req {
81 } __attribute__((packed));
83 struct virtio_scsi_ctrl_tmf_resp {
85 } __attribute__((packed));
87 /* Asynchronous notification query/subscription */
88 struct virtio_scsi_ctrl_an_req {
91 __virtio32 event_requested;
92 } __attribute__((packed));
94 struct virtio_scsi_ctrl_an_resp {
95 __virtio32 event_actual;
97 } __attribute__((packed));
99 struct virtio_scsi_event {
103 } __attribute__((packed));
105 struct virtio_scsi_config {
106 __virtio32 num_queues;
108 __virtio32 max_sectors;
109 __virtio32 cmd_per_lun;
110 __virtio32 event_info_size;
111 __virtio32 sense_size;
113 __virtio16 max_channel;
114 __virtio16 max_target;
116 } __attribute__((packed));
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
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
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
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
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
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
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
172 #endif /* _LINUX_VIRTIO_SCSI_H */