| /****************************************************************************** |
| * 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]; |
| }; |
| |
| /* 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 */ |