Merge remote-tracking branch 'remotes/alistair23/tags/pull-riscv-to-apply-20211022...
[qemu.git] / pc-bios / s390-ccw / virtio-scsi.h
1 /*
2 * Virtio-SCSI definitions for s390 machine loader for qemu
3 *
4 * Copyright 2015 IBM Corp.
5 * Author: Eugene "jno" Dvurechenski <jno@linux.vnet.ibm.com>
6 *
7 * This work is licensed under the terms of the GNU GPL, version 2 or (at
8 * your option) any later version. See the COPYING file in the top-level
9 * directory.
10 */
11
12 #ifndef VIRTIO_SCSI_H
13 #define VIRTIO_SCSI_H
14
15 #include "s390-ccw.h"
16 #include "virtio.h"
17 #include "scsi.h"
18
19 #define VIRTIO_SCSI_CDB_SIZE SCSI_DEFAULT_CDB_SIZE
20 #define VIRTIO_SCSI_SENSE_SIZE SCSI_DEFAULT_SENSE_SIZE
21
22 #define VIRTIO_SCSI_MAX_SECTORS 2048
23
24 /* command-specific response values */
25 #define VIRTIO_SCSI_S_OK 0x00
26 #define VIRTIO_SCSI_S_BAD_TARGET 0x03
27
28 #define QEMU_CDROM_SIGNATURE "QEMU CD-ROM "
29
30 enum virtio_scsi_vq_id {
31 VR_CONTROL = 0,
32 VR_EVENT = 1,
33 VR_REQUEST = 2,
34 };
35
36 struct VirtioScsiCmdReq {
37 ScsiLun lun;
38 uint64_t id;
39 uint8_t task_attr; /* = 0 = VIRTIO_SCSI_S_SIMPLE */
40 uint8_t prio;
41 uint8_t crn; /* = 0 */
42 uint8_t cdb[VIRTIO_SCSI_CDB_SIZE];
43 } __attribute__((packed));
44 typedef struct VirtioScsiCmdReq VirtioScsiCmdReq;
45
46 struct VirtioScsiCmdResp {
47 uint32_t sense_len;
48 uint32_t residual;
49 uint16_t status_qualifier;
50 uint8_t status; /* first check for .response */
51 uint8_t response; /* then for .status */
52 uint8_t sense[VIRTIO_SCSI_SENSE_SIZE];
53 } __attribute__((packed));
54 typedef struct VirtioScsiCmdResp VirtioScsiCmdResp;
55
56 static inline const char *virtio_scsi_response_msg(const VirtioScsiCmdResp *r)
57 {
58 static char err_msg[] = "VS RESP=XX";
59 uint8_t v = r->response;
60
61 fill_hex_val(err_msg + 8, &v, 1);
62 return err_msg;
63 }
64
65 static inline bool virtio_scsi_response_ok(const VirtioScsiCmdResp *r)
66 {
67 return r->response == VIRTIO_SCSI_S_OK && r->status == CDB_STATUS_GOOD;
68 }
69
70 int virtio_scsi_setup(VDev *vdev);
71 int virtio_scsi_read_many(VDev *vdev,
72 ulong sector, void *load_addr, int sec_num);
73
74 #endif /* VIRTIO_SCSI_H */