mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 12:14:01 +08:00
365a715009
This patch implements the hotplug support for virtio-scsi. When there is a device attached/detached, the virtio-scsi driver will be signaled via event virtual queue and it will add/remove the scsi device in question automatically. Signed-off-by: Sen Wang <senwang@linux.vnet.ibm.com> Signed-off-by: Cong Meng <mc@linux.vnet.ibm.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
124 lines
3.5 KiB
C
124 lines
3.5 KiB
C
#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
|
|
|
|
/* 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
|
|
|
|
/* 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 */
|