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/******************************************************************************
* Copyright (c) 2012 IBM Corporation
* All rights reserved.
* This program and the accompanying materials
* are made available under the terms of the BSD License
* which accompanies this distribution, and is available at
* http://www.opensource.org/licenses/bsd-license.php
*
* Contributors:
* IBM Corporation - initial implementation
*****************************************************************************/
/*
* Virtio SCSI Host device definitions.
* See Virtio Spec, Appendix I, for details
*/
#ifndef _VIRTIO_SCSI_H
#define _VIRTIO_SCSI_H
#define VIRTIO_SCSI_CDB_SIZE 32
#define VIRTIO_SCSI_SENSE_SIZE 96
#define VIRTIO_SCSI_CONTROL_VQ 0
#define VIRTIO_SCSI_EVENT_VQ 1
#define VIRTIO_SCSI_REQUEST_VQ 2
struct virtio_scsi_config
{
uint32_t num_queues;
uint32_t seg_max;
uint32_t max_sectors;
uint32_t cmd_per_lun;
uint32_t event_info_size;
uint32_t sense_size;
uint32_t cdb_size;
uint16_t max_channel;
uint16_t max_target;
uint32_t max_lun;
} __attribute__((packed));
/* This is the first element of the "out" scatter-gather list. */
struct virtio_scsi_req_cmd {
uint8_t lun[8];
uint64_t tag;
uint8_t task_attr;
uint8_t prio;
uint8_t crn;
char cdb[VIRTIO_SCSI_CDB_SIZE];
} __attribute__((packed));
/* This is the first element of the "in" scatter-gather list. */
struct virtio_scsi_resp_cmd {
uint32_t sense_len;
uint32_t residual;
uint16_t status_qualifier;
uint8_t status;
uint8_t response;
uint8_t sense[VIRTIO_SCSI_SENSE_SIZE];
};
extern int virtioscsi_init(struct virtio_device *dev);
extern void virtioscsi_shutdown(struct virtio_device *dev);
extern int virtioscsi_send(struct virtio_device *dev,
struct virtio_scsi_req_cmd *req,
struct virtio_scsi_resp_cmd *resp,
int is_read, void *buf, uint64_t buf_len);
#endif /* _VIRTIO_SCSI_H */
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