173 lines
5.9 KiB
C
173 lines
5.9 KiB
C
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/*
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* This header is BSD licensed so anyone can use the definitions to implement
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* compatible drivers/servers.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _LINUX_VIRTIO_SCSI_H
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#define _LINUX_VIRTIO_SCSI_H
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#include <linux/virtio_types.h>
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/* Default values of the CDB and sense data size configuration fields */
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#define VIRTIO_SCSI_CDB_DEFAULT_SIZE 32
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#define VIRTIO_SCSI_SENSE_DEFAULT_SIZE 96
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#ifndef VIRTIO_SCSI_CDB_SIZE
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#define VIRTIO_SCSI_CDB_SIZE VIRTIO_SCSI_CDB_DEFAULT_SIZE
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#endif
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#ifndef VIRTIO_SCSI_SENSE_SIZE
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#define VIRTIO_SCSI_SENSE_SIZE VIRTIO_SCSI_SENSE_DEFAULT_SIZE
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#endif
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/* SCSI command request, followed by data-out */
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struct virtio_scsi_cmd_req {
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__u8 lun[8]; /* Logical Unit Number */
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__virtio64 tag; /* Command identifier */
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__u8 task_attr; /* Task attribute */
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__u8 prio; /* SAM command priority field */
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__u8 crn;
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__u8 cdb[VIRTIO_SCSI_CDB_SIZE];
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} __attribute__((packed));
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/* SCSI command request, followed by protection information */
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struct virtio_scsi_cmd_req_pi {
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__u8 lun[8]; /* Logical Unit Number */
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__virtio64 tag; /* Command identifier */
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__u8 task_attr; /* Task attribute */
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__u8 prio; /* SAM command priority field */
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__u8 crn;
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__virtio32 pi_bytesout; /* DataOUT PI Number of bytes */
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__virtio32 pi_bytesin; /* DataIN PI Number of bytes */
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__u8 cdb[VIRTIO_SCSI_CDB_SIZE];
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} __attribute__((packed));
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/* Response, followed by sense data and data-in */
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struct virtio_scsi_cmd_resp {
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__virtio32 sense_len; /* Sense data length */
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__virtio32 resid; /* Residual bytes in data buffer */
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__virtio16 status_qualifier; /* Status qualifier */
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__u8 status; /* Command completion status */
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__u8 response; /* Response values */
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__u8 sense[VIRTIO_SCSI_SENSE_SIZE];
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} __attribute__((packed));
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/* Task Management Request */
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struct virtio_scsi_ctrl_tmf_req {
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__virtio32 type;
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__virtio32 subtype;
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__u8 lun[8];
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__virtio64 tag;
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} __attribute__((packed));
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struct virtio_scsi_ctrl_tmf_resp {
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__u8 response;
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} __attribute__((packed));
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/* Asynchronous notification query/subscription */
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struct virtio_scsi_ctrl_an_req {
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__virtio32 type;
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__u8 lun[8];
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__virtio32 event_requested;
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} __attribute__((packed));
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struct virtio_scsi_ctrl_an_resp {
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__virtio32 event_actual;
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__u8 response;
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} __attribute__((packed));
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struct virtio_scsi_event {
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__virtio32 event;
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__u8 lun[8];
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__virtio32 reason;
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} __attribute__((packed));
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struct virtio_scsi_config {
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__virtio32 num_queues;
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__virtio32 seg_max;
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__virtio32 max_sectors;
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__virtio32 cmd_per_lun;
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__virtio32 event_info_size;
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__virtio32 sense_size;
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__virtio32 cdb_size;
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__virtio16 max_channel;
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__virtio16 max_target;
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__virtio32 max_lun;
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} __attribute__((packed));
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/* Feature Bits */
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#define VIRTIO_SCSI_F_INOUT 0
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#define VIRTIO_SCSI_F_HOTPLUG 1
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#define VIRTIO_SCSI_F_CHANGE 2
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#define VIRTIO_SCSI_F_T10_PI 3
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/* Response codes */
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#define VIRTIO_SCSI_S_OK 0
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#define VIRTIO_SCSI_S_OVERRUN 1
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#define VIRTIO_SCSI_S_ABORTED 2
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#define VIRTIO_SCSI_S_BAD_TARGET 3
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#define VIRTIO_SCSI_S_RESET 4
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#define VIRTIO_SCSI_S_BUSY 5
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#define VIRTIO_SCSI_S_TRANSPORT_FAILURE 6
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#define VIRTIO_SCSI_S_TARGET_FAILURE 7
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#define VIRTIO_SCSI_S_NEXUS_FAILURE 8
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#define VIRTIO_SCSI_S_FAILURE 9
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#define VIRTIO_SCSI_S_FUNCTION_SUCCEEDED 10
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#define VIRTIO_SCSI_S_FUNCTION_REJECTED 11
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#define VIRTIO_SCSI_S_INCORRECT_LUN 12
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/* Controlq type codes. */
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#define VIRTIO_SCSI_T_TMF 0
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#define VIRTIO_SCSI_T_AN_QUERY 1
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#define VIRTIO_SCSI_T_AN_SUBSCRIBE 2
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/* Valid TMF subtypes. */
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#define VIRTIO_SCSI_T_TMF_ABORT_TASK 0
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#define VIRTIO_SCSI_T_TMF_ABORT_TASK_SET 1
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#define VIRTIO_SCSI_T_TMF_CLEAR_ACA 2
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#define VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET 3
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#define VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET 4
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#define VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET 5
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#define VIRTIO_SCSI_T_TMF_QUERY_TASK 6
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#define VIRTIO_SCSI_T_TMF_QUERY_TASK_SET 7
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/* Events. */
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#define VIRTIO_SCSI_T_EVENTS_MISSED 0x80000000
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#define VIRTIO_SCSI_T_NO_EVENT 0
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#define VIRTIO_SCSI_T_TRANSPORT_RESET 1
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#define VIRTIO_SCSI_T_ASYNC_NOTIFY 2
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#define VIRTIO_SCSI_T_PARAM_CHANGE 3
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/* Reasons of transport reset event */
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#define VIRTIO_SCSI_EVT_RESET_HARD 0
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#define VIRTIO_SCSI_EVT_RESET_RESCAN 1
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#define VIRTIO_SCSI_EVT_RESET_REMOVED 2
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#define VIRTIO_SCSI_S_SIMPLE 0
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#define VIRTIO_SCSI_S_ORDERED 1
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#define VIRTIO_SCSI_S_HEAD 2
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#define VIRTIO_SCSI_S_ACA 3
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#endif /* _LINUX_VIRTIO_SCSI_H */
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