1 #ifndef QEMU_HW_SCSI_H 2 #define QEMU_HW_SCSI_H 3 4 #include "block/aio.h" 5 #include "hw/block/block.h" 6 #include "hw/qdev-core.h" 7 #include "scsi/utils.h" 8 #include "qemu/notify.h" 9 #include "qom/object.h" 10 11 #define MAX_SCSI_DEVS 255 12 13 typedef struct SCSIBus SCSIBus; 14 typedef struct SCSIBusInfo SCSIBusInfo; 15 typedef struct SCSIDevice SCSIDevice; 16 typedef struct SCSIRequest SCSIRequest; 17 typedef struct SCSIReqOps SCSIReqOps; 18 19 #define SCSI_SENSE_BUF_SIZE_OLD 96 20 #define SCSI_SENSE_BUF_SIZE 252 21 #define DEFAULT_IO_TIMEOUT 30 22 23 struct SCSIRequest { 24 SCSIBus *bus; 25 SCSIDevice *dev; 26 const SCSIReqOps *ops; 27 uint32_t refcount; 28 uint32_t tag; 29 uint32_t lun; 30 int16_t status; 31 int16_t host_status; 32 void *hba_private; 33 uint64_t residual; 34 SCSICommand cmd; 35 NotifierList cancel_notifiers; 36 37 /* Note: 38 * - fields before sense are initialized by scsi_req_alloc; 39 * - sense[] is uninitialized; 40 * - fields after sense are memset to 0 by scsi_req_alloc. 41 * */ 42 43 uint8_t sense[SCSI_SENSE_BUF_SIZE]; 44 uint32_t sense_len; 45 bool enqueued; 46 bool io_canceled; 47 bool retry; 48 bool dma_started; 49 BlockAIOCB *aiocb; 50 QEMUSGList *sg; 51 QTAILQ_ENTRY(SCSIRequest) next; 52 }; 53 54 #define TYPE_SCSI_DEVICE "scsi-device" 55 OBJECT_DECLARE_TYPE(SCSIDevice, SCSIDeviceClass, SCSI_DEVICE) 56 57 struct SCSIDeviceClass { 58 DeviceClass parent_class; 59 void (*realize)(SCSIDevice *dev, Error **errp); 60 void (*unrealize)(SCSIDevice *dev); 61 int (*parse_cdb)(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf, 62 size_t buf_len, void *hba_private); 63 SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun, 64 uint8_t *buf, void *hba_private); 65 void (*unit_attention_reported)(SCSIDevice *s); 66 }; 67 68 struct SCSIDevice 69 { 70 DeviceState qdev; 71 VMChangeStateEntry *vmsentry; 72 uint32_t id; 73 BlockConf conf; 74 SCSISense unit_attention; 75 bool sense_is_ua; 76 uint8_t sense[SCSI_SENSE_BUF_SIZE]; 77 uint32_t sense_len; 78 79 /* 80 * The requests list is only accessed from the AioContext that executes 81 * requests or from the main loop when IOThread processing is stopped. 82 */ 83 QTAILQ_HEAD(, SCSIRequest) requests; 84 85 uint32_t channel; 86 uint32_t lun; 87 int blocksize; 88 int type; 89 uint64_t max_lba; 90 uint64_t wwn; 91 uint64_t port_wwn; 92 int scsi_version; 93 int default_scsi_version; 94 uint32_t io_timeout; 95 bool needs_vpd_bl_emulation; 96 bool hba_supports_iothread; 97 }; 98 99 extern const VMStateDescription vmstate_scsi_device; 100 101 #define VMSTATE_SCSI_DEVICE(_field, _state) { \ 102 .name = (stringify(_field)), \ 103 .size = sizeof(SCSIDevice), \ 104 .vmsd = &vmstate_scsi_device, \ 105 .flags = VMS_STRUCT, \ 106 .offset = vmstate_offset_value(_state, _field, SCSIDevice), \ 107 } 108 109 /* cdrom.c */ 110 int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track); 111 int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num); 112 113 /* scsi-bus.c */ 114 struct SCSIReqOps { 115 size_t size; 116 void (*init_req)(SCSIRequest *req); 117 void (*free_req)(SCSIRequest *req); 118 int32_t (*send_command)(SCSIRequest *req, uint8_t *buf); 119 void (*read_data)(SCSIRequest *req); 120 void (*write_data)(SCSIRequest *req); 121 uint8_t *(*get_buf)(SCSIRequest *req); 122 123 void (*save_request)(QEMUFile *f, SCSIRequest *req); 124 void (*load_request)(QEMUFile *f, SCSIRequest *req); 125 }; 126 127 struct SCSIBusInfo { 128 int tcq; 129 int max_channel, max_target, max_lun; 130 int (*parse_cdb)(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf, 131 size_t buf_len, void *hba_private); 132 void (*transfer_data)(SCSIRequest *req, uint32_t arg); 133 void (*fail)(SCSIRequest *req); 134 void (*complete)(SCSIRequest *req, size_t residual); 135 void (*cancel)(SCSIRequest *req); 136 void (*change)(SCSIBus *bus, SCSIDevice *dev, SCSISense sense); 137 QEMUSGList *(*get_sg_list)(SCSIRequest *req); 138 139 void (*save_request)(QEMUFile *f, SCSIRequest *req); 140 void *(*load_request)(QEMUFile *f, SCSIRequest *req); 141 void (*free_request)(SCSIBus *bus, void *priv); 142 143 /* 144 * Temporarily stop submitting new requests between drained_begin() and 145 * drained_end(). Called from the main loop thread with the BQL held. 146 * 147 * Implement these callbacks if request processing is triggered by a file 148 * descriptor like an EventNotifier. Otherwise set them to NULL. 149 */ 150 void (*drained_begin)(SCSIBus *bus); 151 void (*drained_end)(SCSIBus *bus); 152 }; 153 154 #define TYPE_SCSI_BUS "SCSI" 155 OBJECT_DECLARE_SIMPLE_TYPE(SCSIBus, SCSI_BUS) 156 157 struct SCSIBus { 158 BusState qbus; 159 int busnr; 160 161 SCSISense unit_attention; 162 const SCSIBusInfo *info; 163 164 int drain_count; /* protected by BQL */ 165 }; 166 167 /** 168 * scsi_bus_init_named: Initialize a SCSI bus with the specified name 169 * @bus: SCSIBus object to initialize 170 * @bus_size: size of @bus object 171 * @host: Device which owns the bus (generally the SCSI controller) 172 * @info: structure defining callbacks etc for the controller 173 * @bus_name: Name to use for this bus 174 * 175 * This in-place initializes @bus as a new SCSI bus with a name 176 * provided by the caller. It is the caller's responsibility to make 177 * sure that name does not clash with the name of any other bus in the 178 * system. Unless you need the new bus to have a specific name, you 179 * should use scsi_bus_init() instead. 180 */ 181 void scsi_bus_init_named(SCSIBus *bus, size_t bus_size, DeviceState *host, 182 const SCSIBusInfo *info, const char *bus_name); 183 184 /** 185 * scsi_bus_init: Initialize a SCSI bus 186 * 187 * This in-place-initializes @bus as a new SCSI bus and gives it 188 * an automatically generated unique name. 189 */ 190 static inline void scsi_bus_init(SCSIBus *bus, size_t bus_size, 191 DeviceState *host, const SCSIBusInfo *info) 192 { 193 scsi_bus_init_named(bus, bus_size, host, info, NULL); 194 } 195 196 static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d) 197 { 198 return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus); 199 } 200 201 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockBackend *blk, 202 int unit, bool removable, BlockConf *conf, 203 const char *serial, Error **errp); 204 void scsi_bus_set_ua(SCSIBus *bus, SCSISense sense); 205 void scsi_bus_legacy_handle_cmdline(SCSIBus *bus); 206 207 SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d, 208 uint32_t tag, uint32_t lun, void *hba_private); 209 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun, 210 uint8_t *buf, size_t buf_len, void *hba_private); 211 int32_t scsi_req_enqueue(SCSIRequest *req); 212 SCSIRequest *scsi_req_ref(SCSIRequest *req); 213 void scsi_req_unref(SCSIRequest *req); 214 215 int scsi_bus_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf, 216 size_t buf_len, void *hba_private); 217 int scsi_req_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf, 218 size_t buf_len); 219 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense); 220 void scsi_req_print(SCSIRequest *req); 221 void scsi_req_continue(SCSIRequest *req); 222 void scsi_req_data(SCSIRequest *req, int len); 223 void scsi_req_complete(SCSIRequest *req, int status); 224 void scsi_req_complete_failed(SCSIRequest *req, int host_status); 225 uint8_t *scsi_req_get_buf(SCSIRequest *req); 226 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len); 227 void scsi_req_cancel_complete(SCSIRequest *req); 228 void scsi_req_cancel(SCSIRequest *req); 229 void scsi_req_cancel_async(SCSIRequest *req, Notifier *notifier); 230 void scsi_req_retry(SCSIRequest *req); 231 void scsi_device_drained_begin(SCSIDevice *sdev); 232 void scsi_device_drained_end(SCSIDevice *sdev); 233 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense); 234 void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense); 235 void scsi_device_report_change(SCSIDevice *dev, SCSISense sense); 236 void scsi_device_unit_attention_reported(SCSIDevice *dev); 237 void scsi_generic_read_device_inquiry(SCSIDevice *dev); 238 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed); 239 int scsi_SG_IO_FROM_DEV(BlockBackend *blk, uint8_t *cmd, uint8_t cmd_size, 240 uint8_t *buf, uint8_t buf_size, uint32_t timeout); 241 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int target, int lun); 242 SCSIDevice *scsi_device_get(SCSIBus *bus, int channel, int target, int lun); 243 244 /* scsi-generic.c. */ 245 extern const SCSIReqOps scsi_generic_req_ops; 246 247 /* scsi-disk.c */ 248 #define SCSI_DISK_QUIRK_MODE_PAGE_APPLE_VENDOR 0 249 #define SCSI_DISK_QUIRK_MODE_SENSE_ROM_USE_DBD 1 250 #define SCSI_DISK_QUIRK_MODE_PAGE_VENDOR_SPECIFIC_APPLE 2 251 #define SCSI_DISK_QUIRK_MODE_PAGE_TRUNCATED 3 252 253 #endif 254