root/include/uapi/linux/virtio_scsi.h

INCLUDED FROM

   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         __u32 num_queues;
 107         __u32 seg_max;
 108         __u32 max_sectors;
 109         __u32 cmd_per_lun;
 110         __u32 event_info_size;
 111         __u32 sense_size;
 112         __u32 cdb_size;
 113         __u16 max_channel;
 114         __u16 max_target;
 115         __u32 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 */