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/*
* Virtio-SCSI definitions for s390 machine loader for qemu
*
* Copyright 2015 IBM Corp.
* Author: Eugene "jno" Dvurechenski <jno@linux.vnet.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or (at
* your option) any later version. See the COPYING file in the top-level
* directory.
*/
#ifndef VIRTIO_SCSI_H
#define VIRTIO_SCSI_H
#include "s390-ccw.h"
#include "virtio.h"
#include "scsi.h"
#define VIRTIO_SCSI_CDB_SIZE SCSI_DEFAULT_CDB_SIZE
#define VIRTIO_SCSI_SENSE_SIZE SCSI_DEFAULT_SENSE_SIZE
#define VIRTIO_SCSI_MAX_SECTORS 2048
/* command-specific response values */
#define VIRTIO_SCSI_S_OK 0x00
#define VIRTIO_SCSI_S_BAD_TARGET 0x03
#define QEMU_CDROM_SIGNATURE "QEMU CD-ROM "
enum virtio_scsi_vq_id {
VR_CONTROL = 0,
VR_EVENT = 1,
VR_REQUEST = 2,
};
struct VirtioScsiCmdReq {
ScsiLun lun;
uint64_t id;
uint8_t task_attr; /* = 0 = VIRTIO_SCSI_S_SIMPLE */
uint8_t prio;
uint8_t crn; /* = 0 */
uint8_t cdb[VIRTIO_SCSI_CDB_SIZE];
} __attribute__((packed));
typedef struct VirtioScsiCmdReq VirtioScsiCmdReq;
struct VirtioScsiCmdResp {
uint32_t sense_len;
uint32_t residual;
uint16_t status_qualifier;
uint8_t status; /* first check for .response */
uint8_t response; /* then for .status */
uint8_t sense[VIRTIO_SCSI_SENSE_SIZE];
} __attribute__((packed));
typedef struct VirtioScsiCmdResp VirtioScsiCmdResp;
static inline const char *virtio_scsi_response_msg(const VirtioScsiCmdResp *r)
{
static char err_msg[] = "VS RESP=XX";
uint8_t v = r->response;
fill_hex_val(err_msg + 8, &v, 1);
return err_msg;
}
static inline bool virtio_scsi_response_ok(const VirtioScsiCmdResp *r)
{
return r->response == VIRTIO_SCSI_S_OK && r->status == CDB_STATUS_GOOD;
}
void virtio_scsi_setup(VDev *vdev);
int virtio_scsi_read_many(VDev *vdev,
ulong sector, void *load_addr, int sec_num);
#endif /* VIRTIO_SCSI_H */
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