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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 | /* command-specific response values */ | |
23 | #define VIRTIO_SCSI_S_OK 0x00 | |
24 | #define VIRTIO_SCSI_S_BAD_TARGET 0x03 | |
25 | ||
26 | #define QEMU_CDROM_SIGNATURE "QEMU CD-ROM " | |
27 | ||
28 | enum virtio_scsi_vq_id { | |
29 | VR_CONTROL = 0, | |
30 | VR_EVENT = 1, | |
31 | VR_REQUEST = 2, | |
32 | }; | |
33 | ||
34 | struct VirtioScsiCmdReq { | |
35 | ScsiLun lun; | |
36 | uint64_t id; | |
37 | uint8_t task_attr; /* = 0 = VIRTIO_SCSI_S_SIMPLE */ | |
38 | uint8_t prio; | |
39 | uint8_t crn; /* = 0 */ | |
40 | uint8_t cdb[VIRTIO_SCSI_CDB_SIZE]; | |
41 | } __attribute__((packed)); | |
42 | typedef struct VirtioScsiCmdReq VirtioScsiCmdReq; | |
43 | ||
44 | struct VirtioScsiCmdResp { | |
45 | uint32_t sense_len; | |
46 | uint32_t residual; | |
47 | uint16_t status_qualifier; | |
48 | uint8_t status; /* first check for .response */ | |
49 | uint8_t response; /* then for .status */ | |
50 | uint8_t sense[VIRTIO_SCSI_SENSE_SIZE]; | |
51 | } __attribute__((packed)); | |
52 | typedef struct VirtioScsiCmdResp VirtioScsiCmdResp; | |
53 | ||
54 | static inline const char *virtio_scsi_response_msg(const VirtioScsiCmdResp *r) | |
55 | { | |
56 | static char err_msg[] = "VS RESP=XX"; | |
57 | uint8_t v = r->response; | |
58 | ||
59 | fill_hex_val(err_msg + 8, &v, 1); | |
60 | return err_msg; | |
61 | } | |
62 | ||
63 | static inline bool virtio_scsi_response_ok(const VirtioScsiCmdResp *r) | |
64 | { | |
65 | return r->response == VIRTIO_SCSI_S_OK && r->status == CDB_STATUS_GOOD; | |
66 | } | |
67 | ||
68 | void virtio_scsi_setup(VDev *vdev); | |
69 | int virtio_scsi_read_many(VDev *vdev, | |
70 | ulong sector, void *load_addr, int sec_num); | |
71 | ||
72 | #endif /* VIRTIO_SCSI_H */ |