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