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 28enum virtio_scsi_vq_id { 29 VR_CONTROL = 0, 30 VR_EVENT = 1, 31 VR_REQUEST = 2, 32}; 33 34struct 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)); 42typedef struct VirtioScsiCmdReq VirtioScsiCmdReq; 43 44struct 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)); 52typedef struct VirtioScsiCmdResp VirtioScsiCmdResp; 53 54static 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 63static 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 68void virtio_scsi_setup(VDev *vdev); 69int virtio_scsi_read_many(VDev *vdev, 70 ulong sector, void *load_addr, int sec_num); 71 72#endif /* VIRTIO_SCSI_H */ 73