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(SubChannelId schid); 73 74 #endif /* VIRTIO_SCSI_H */ 75