| 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_read_many(VDev *vdev, |
| 71 | unsigned long sector, void *load_addr, int sec_num); |
| 72 | int virtio_scsi_setup_device(VDev *vdev); |
| 73 | |
| 74 | #endif /* VIRTIO_SCSI_H */ |