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#ifndef _LINUX_VIRTIO_SCSI_H
#define _LINUX_VIRTIO_SCSI_H
/* This header is BSD licensed so anyone can use the definitions to implement
* compatible drivers/servers. */
#define VIRTIO_SCSI_CDB_SIZE 32
#define VIRTIO_SCSI_SENSE_SIZE 96
/* SCSI command request, followed by data-out */
struct virtio_scsi_cmd_req {
u8 lun[8]; /* Logical Unit Number */
u64 tag; /* Command identifier */
u8 task_attr; /* Task attribute */
u8 prio;
u8 crn;
u8 cdb[VIRTIO_SCSI_CDB_SIZE];
} __packed;
/* Response, followed by sense data and data-in */
struct virtio_scsi_cmd_resp {
u32 sense_len; /* Sense data length */
u32 resid; /* Residual bytes in data buffer */
u16 status_qualifier; /* Status qualifier */
u8 status; /* Command completion status */
u8 response; /* Response values */
u8 sense[VIRTIO_SCSI_SENSE_SIZE];
} __packed;
/* Task Management Request */
struct virtio_scsi_ctrl_tmf_req {
u32 type;
u32 subtype;
u8 lun[8];
u64 tag;
} __packed;
struct virtio_scsi_ctrl_tmf_resp {
u8 response;
} __packed;
/* Asynchronous notification query/subscription */
struct virtio_scsi_ctrl_an_req {
u32 type;
u8 lun[8];
u32 event_requested;
} __packed;
struct virtio_scsi_ctrl_an_resp {
u32 event_actual;
u8 response;
} __packed;
struct virtio_scsi_event {
u32 event;
u8 lun[8];
u32 reason;
} __packed;
struct virtio_scsi_config {
u32 num_queues;
u32 seg_max;
u32 max_sectors;
u32 cmd_per_lun;
u32 event_info_size;
u32 sense_size;
u32 cdb_size;
u16 max_channel;
u16 max_target;
u32 max_lun;
} __packed;
/* Feature Bits */
#define VIRTIO_SCSI_F_INOUT 0
#define VIRTIO_SCSI_F_HOTPLUG 1
#define VIRTIO_SCSI_F_CHANGE 2
/* Response codes */
#define VIRTIO_SCSI_S_OK 0
#define VIRTIO_SCSI_S_OVERRUN 1
#define VIRTIO_SCSI_S_ABORTED 2
#define VIRTIO_SCSI_S_BAD_TARGET 3
#define VIRTIO_SCSI_S_RESET 4
#define VIRTIO_SCSI_S_BUSY 5
#define VIRTIO_SCSI_S_TRANSPORT_FAILURE 6
#define VIRTIO_SCSI_S_TARGET_FAILURE 7
#define VIRTIO_SCSI_S_NEXUS_FAILURE 8
#define VIRTIO_SCSI_S_FAILURE 9
#define VIRTIO_SCSI_S_FUNCTION_SUCCEEDED 10
#define VIRTIO_SCSI_S_FUNCTION_REJECTED 11
#define VIRTIO_SCSI_S_INCORRECT_LUN 12
/* Controlq type codes. */
#define VIRTIO_SCSI_T_TMF 0
#define VIRTIO_SCSI_T_AN_QUERY 1
#define VIRTIO_SCSI_T_AN_SUBSCRIBE 2
/* Valid TMF subtypes. */
#define VIRTIO_SCSI_T_TMF_ABORT_TASK 0
#define VIRTIO_SCSI_T_TMF_ABORT_TASK_SET 1
#define VIRTIO_SCSI_T_TMF_CLEAR_ACA 2
#define VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET 3
#define VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET 4
#define VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET 5
#define VIRTIO_SCSI_T_TMF_QUERY_TASK 6
#define VIRTIO_SCSI_T_TMF_QUERY_TASK_SET 7
/* Events. */
#define VIRTIO_SCSI_T_EVENTS_MISSED 0x80000000
#define VIRTIO_SCSI_T_NO_EVENT 0
#define VIRTIO_SCSI_T_TRANSPORT_RESET 1
#define VIRTIO_SCSI_T_ASYNC_NOTIFY 2
#define VIRTIO_SCSI_T_PARAM_CHANGE 3
/* Reasons of transport reset event */
#define VIRTIO_SCSI_EVT_RESET_HARD 0
#define VIRTIO_SCSI_EVT_RESET_RESCAN 1
#define VIRTIO_SCSI_EVT_RESET_REMOVED 2
#define VIRTIO_SCSI_S_SIMPLE 0
#define VIRTIO_SCSI_S_ORDERED 1
#define VIRTIO_SCSI_S_HEAD 2
#define VIRTIO_SCSI_S_ACA 3
#endif /* _LINUX_VIRTIO_SCSI_H */
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