include/uapi/linux/virtio_scsi.h

   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 #define VIRTIO_SCSI_CDB_SIZE   32
  33 #define VIRTIO_SCSI_SENSE_SIZE 96
  34
  35 /* SCSI command request, followed by data-out */
  36 struct virtio_scsi_cmd_req {
  37         __u8 lun[8];            /* Logical Unit Number */
  38         __virtio64 tag;         /* Command identifier */
  39         __u8 task_attr;         /* Task attribute */
  40         __u8 prio;              /* SAM command priority field */
  41         __u8 crn;
  42         __u8 cdb[VIRTIO_SCSI_CDB_SIZE];
  43 } __attribute__((packed));
  44
  45 /* SCSI command request, followed by protection information */
  46 struct virtio_scsi_cmd_req_pi {
  47         __u8 lun[8];            /* Logical Unit Number */
  48         __virtio64 tag;         /* Command identifier */
  49         __u8 task_attr;         /* Task attribute */
  50         __u8 prio;              /* SAM command priority field */
  51         __u8 crn;
  52         __virtio32 pi_bytesout; /* DataOUT PI Number of bytes */
  53         __virtio32 pi_bytesin;          /* DataIN PI Number of bytes */
  54         __u8 cdb[VIRTIO_SCSI_CDB_SIZE];
  55 } __attribute__((packed));
  56
  57 /* Response, followed by sense data and data-in */
  58 struct virtio_scsi_cmd_resp {
  59         __virtio32 sense_len;           /* Sense data length */
  60         __virtio32 resid;               /* Residual bytes in data buffer */
  61         __virtio16 status_qualifier;    /* Status qualifier */
  62         __u8 status;            /* Command completion status */
  63         __u8 response;          /* Response values */
  64         __u8 sense[VIRTIO_SCSI_SENSE_SIZE];
  65 } __attribute__((packed));
  66
  67 /* Task Management Request */
  68 struct virtio_scsi_ctrl_tmf_req {
  69         __virtio32 type;
  70         __virtio32 subtype;
  71         __u8 lun[8];
  72         __virtio64 tag;
  73 } __attribute__((packed));
  74
  75 struct virtio_scsi_ctrl_tmf_resp {
  76         __u8 response;
  77 } __attribute__((packed));
  78
  79 /* Asynchronous notification query/subscription */
  80 struct virtio_scsi_ctrl_an_req {
  81         __virtio32 type;
  82         __u8 lun[8];
  83         __virtio32 event_requested;
  84 } __attribute__((packed));
  85
  86 struct virtio_scsi_ctrl_an_resp {
  87         __virtio32 event_actual;
  88         __u8 response;
  89 } __attribute__((packed));
  90
  91 struct virtio_scsi_event {
  92         __virtio32 event;
  93         __u8 lun[8];
  94         __virtio32 reason;
  95 } __attribute__((packed));
  96
  97 struct virtio_scsi_config {
  98         __u32 num_queues;
  99         __u32 seg_max;
 100         __u32 max_sectors;
 101         __u32 cmd_per_lun;
 102         __u32 event_info_size;
 103         __u32 sense_size;
 104         __u32 cdb_size;
 105         __u16 max_channel;
 106         __u16 max_target;
 107         __u32 max_lun;
 108 } __attribute__((packed));
 109
 110 /* Feature Bits */
 111 #define VIRTIO_SCSI_F_INOUT                    0
 112 #define VIRTIO_SCSI_F_HOTPLUG                  1
 113 #define VIRTIO_SCSI_F_CHANGE                   2
 114 #define VIRTIO_SCSI_F_T10_PI                   3
 115
 116 /* Response codes */
 117 #define VIRTIO_SCSI_S_OK                       0
 118 #define VIRTIO_SCSI_S_OVERRUN                  1
 119 #define VIRTIO_SCSI_S_ABORTED                  2
 120 #define VIRTIO_SCSI_S_BAD_TARGET               3
 121 #define VIRTIO_SCSI_S_RESET                    4
 122 #define VIRTIO_SCSI_S_BUSY                     5
 123 #define VIRTIO_SCSI_S_TRANSPORT_FAILURE        6
 124 #define VIRTIO_SCSI_S_TARGET_FAILURE           7
 125 #define VIRTIO_SCSI_S_NEXUS_FAILURE            8
 126 #define VIRTIO_SCSI_S_FAILURE                  9
 127 #define VIRTIO_SCSI_S_FUNCTION_SUCCEEDED       10
 128 #define VIRTIO_SCSI_S_FUNCTION_REJECTED        11
 129 #define VIRTIO_SCSI_S_INCORRECT_LUN            12
 130
 131 /* Controlq type codes.  */
 132 #define VIRTIO_SCSI_T_TMF                      0
 133 #define VIRTIO_SCSI_T_AN_QUERY                 1
 134 #define VIRTIO_SCSI_T_AN_SUBSCRIBE             2
 135
 136 /* Valid TMF subtypes.  */
 137 #define VIRTIO_SCSI_T_TMF_ABORT_TASK           0
 138 #define VIRTIO_SCSI_T_TMF_ABORT_TASK_SET       1
 139 #define VIRTIO_SCSI_T_TMF_CLEAR_ACA            2
 140 #define VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET       3
 141 #define VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET      4
 142 #define VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET   5
 143 #define VIRTIO_SCSI_T_TMF_QUERY_TASK           6
 144 #define VIRTIO_SCSI_T_TMF_QUERY_TASK_SET       7
 145
 146 /* Events.  */
 147 #define VIRTIO_SCSI_T_EVENTS_MISSED            0x80000000
 148 #define VIRTIO_SCSI_T_NO_EVENT                 0
 149 #define VIRTIO_SCSI_T_TRANSPORT_RESET          1
 150 #define VIRTIO_SCSI_T_ASYNC_NOTIFY             2
 151 #define VIRTIO_SCSI_T_PARAM_CHANGE             3
 152
 153 /* Reasons of transport reset event */
 154 #define VIRTIO_SCSI_EVT_RESET_HARD             0
 155 #define VIRTIO_SCSI_EVT_RESET_RESCAN           1
 156 #define VIRTIO_SCSI_EVT_RESET_REMOVED          2
 157
 158 #define VIRTIO_SCSI_S_SIMPLE                   0
 159 #define VIRTIO_SCSI_S_ORDERED                  1
 160 #define VIRTIO_SCSI_S_HEAD                     2
 161 #define VIRTIO_SCSI_S_ACA                      3
 162
 163
 164 #endif /* _LINUX_VIRTIO_SCSI_H */