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 */ 73