hw/scsi.h

   1 #ifndef QEMU_HW_SCSI_H
   2 #define QEMU_HW_SCSI_H
   3
   4 #include "qdev.h"
   5 #include "block.h"
   6 #include "sysemu.h"
   7
   8 #define MAX_SCSI_DEVS   255
   9
  10 #define SCSI_CMD_BUF_SIZE     16
  11
  12 typedef struct SCSIBus SCSIBus;
  13 typedef struct SCSIBusInfo SCSIBusInfo;
  14 typedef struct SCSICommand SCSICommand;
  15 typedef struct SCSIDevice SCSIDevice;
  16 typedef struct SCSIRequest SCSIRequest;
  17 typedef struct SCSIReqOps SCSIReqOps;
  18
  19 enum SCSIXferMode {
  20     SCSI_XFER_NONE,      /*  TEST_UNIT_READY, ...            */
  21     SCSI_XFER_FROM_DEV,  /*  READ, INQUIRY, MODE_SENSE, ...  */
  22     SCSI_XFER_TO_DEV,    /*  WRITE, MODE_SELECT, ...         */
  23 };
  24
  25 typedef struct SCSISense {
  26     uint8_t key;
  27     uint8_t asc;
  28     uint8_t ascq;
  29 } SCSISense;
  30
  31 #define SCSI_SENSE_BUF_SIZE 96
  32
  33 struct SCSICommand {
  34     uint8_t buf[SCSI_CMD_BUF_SIZE];
  35     int len;
  36     size_t xfer;
  37     uint64_t lba;
  38     enum SCSIXferMode mode;
  39 };
  40
  41 struct SCSIRequest {
  42     SCSIBus           *bus;
  43     SCSIDevice        *dev;
  44     const SCSIReqOps  *ops;
  45     uint32_t          refcount;
  46     uint32_t          tag;
  47     uint32_t          lun;
  48     uint32_t          status;
  49     size_t            resid;
  50     SCSICommand       cmd;
  51     BlockDriverAIOCB  *aiocb;
  52     QEMUSGList        *sg;
  53     bool              dma_started;
  54     uint8_t sense[SCSI_SENSE_BUF_SIZE];
  55     uint32_t sense_len;
  56     bool enqueued;
  57     bool io_canceled;
  58     bool retry;
  59     void *hba_private;
  60     QTAILQ_ENTRY(SCSIRequest) next;
  61 };
  62
  63 #define TYPE_SCSI_DEVICE "scsi-device"
  64 #define SCSI_DEVICE(obj) \
  65      OBJECT_CHECK(SCSIDevice, (obj), TYPE_SCSI_DEVICE)
  66 #define SCSI_DEVICE_CLASS(klass) \
  67      OBJECT_CLASS_CHECK(SCSIDeviceClass, (klass), TYPE_SCSI_DEVICE)
  68 #define SCSI_DEVICE_GET_CLASS(obj) \
  69      OBJECT_GET_CLASS(SCSIDeviceClass, (obj), TYPE_SCSI_DEVICE)
  70
  71 typedef struct SCSIDeviceClass {
  72     DeviceClass parent_class;
  73     int (*init)(SCSIDevice *dev);
  74     void (*destroy)(SCSIDevice *s);
  75     SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun,
  76                               uint8_t *buf, void *hba_private);
  77     void (*unit_attention_reported)(SCSIDevice *s);
  78 } SCSIDeviceClass;
  79
  80 struct SCSIDevice
  81 {
  82     DeviceState qdev;
  83     VMChangeStateEntry *vmsentry;
  84     QEMUBH *bh;
  85     uint32_t id;
  86     BlockConf conf;
  87     SCSISense unit_attention;
  88     bool sense_is_ua;
  89     uint8_t sense[SCSI_SENSE_BUF_SIZE];
  90     uint32_t sense_len;
  91     QTAILQ_HEAD(, SCSIRequest) requests;
  92     uint32_t channel;
  93     uint32_t lun;
  94     int blocksize;
  95     int type;
  96     uint64_t max_lba;
  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 (*free_req)(SCSIRequest *req);
 117     int32_t (*send_command)(SCSIRequest *req, uint8_t *buf);
 118     void (*read_data)(SCSIRequest *req);
 119     void (*write_data)(SCSIRequest *req);
 120     void (*cancel_io)(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     void (*transfer_data)(SCSIRequest *req, uint32_t arg);
 131     void (*complete)(SCSIRequest *req, uint32_t arg, size_t resid);
 132     void (*cancel)(SCSIRequest *req);
 133     QEMUSGList *(*get_sg_list)(SCSIRequest *req);
 134
 135     void (*save_request)(QEMUFile *f, SCSIRequest *req);
 136     void *(*load_request)(QEMUFile *f, SCSIRequest *req);
 137 };
 138
 139 #define TYPE_SCSI_BUS "SCSI"
 140 #define SCSI_BUS(obj) OBJECT_CHECK(SCSIBus, (obj), TYPE_SCSI_BUS)
 141
 142 struct SCSIBus {
 143     BusState qbus;
 144     int busnr;
 145
 146     SCSISense unit_attention;
 147     const SCSIBusInfo *info;
 148 };
 149
 150 void scsi_bus_new(SCSIBus *bus, DeviceState *host, const SCSIBusInfo *info);
 151
 152 static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
 153 {
 154     return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
 155 }
 156
 157 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv,
 158                                       int unit, bool removable, int bootindex);
 159 int scsi_bus_legacy_handle_cmdline(SCSIBus *bus);
 160
 161 /*
 162  * Predefined sense codes
 163  */
 164
 165 /* No sense data available */
 166 extern const struct SCSISense sense_code_NO_SENSE;
 167 /* LUN not ready, Manual intervention required */
 168 extern const struct SCSISense sense_code_LUN_NOT_READY;
 169 /* LUN not ready, Medium not present */
 170 extern const struct SCSISense sense_code_NO_MEDIUM;
 171 /* LUN not ready, medium removal prevented */
 172 extern const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED;
 173 /* Hardware error, internal target failure */
 174 extern const struct SCSISense sense_code_TARGET_FAILURE;
 175 /* Illegal request, invalid command operation code */
 176 extern const struct SCSISense sense_code_INVALID_OPCODE;
 177 /* Illegal request, LBA out of range */
 178 extern const struct SCSISense sense_code_LBA_OUT_OF_RANGE;
 179 /* Illegal request, Invalid field in CDB */
 180 extern const struct SCSISense sense_code_INVALID_FIELD;
 181 /* Illegal request, LUN not supported */
 182 extern const struct SCSISense sense_code_LUN_NOT_SUPPORTED;
 183 /* Illegal request, Saving parameters not supported */
 184 extern const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED;
 185 /* Illegal request, Incompatible format */
 186 extern const struct SCSISense sense_code_INCOMPATIBLE_FORMAT;
 187 /* Illegal request, medium removal prevented */
 188 extern const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED;
 189 /* Command aborted, I/O process terminated */
 190 extern const struct SCSISense sense_code_IO_ERROR;
 191 /* Command aborted, I_T Nexus loss occurred */
 192 extern const struct SCSISense sense_code_I_T_NEXUS_LOSS;
 193 /* Command aborted, Logical Unit failure */
 194 extern const struct SCSISense sense_code_LUN_FAILURE;
 195 /* LUN not ready, Medium not present */
 196 extern const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM;
 197 /* Unit attention, Power on, reset or bus device reset occurred */
 198 extern const struct SCSISense sense_code_RESET;
 199 /* Unit attention, Medium may have changed*/
 200 extern const struct SCSISense sense_code_MEDIUM_CHANGED;
 201 /* Unit attention, Reported LUNs data has changed */
 202 extern const struct SCSISense sense_code_REPORTED_LUNS_CHANGED;
 203 /* Unit attention, Device internal reset */
 204 extern const struct SCSISense sense_code_DEVICE_INTERNAL_RESET;
 205
 206 #define SENSE_CODE(x) sense_code_ ## x
 207
 208 int scsi_sense_valid(SCSISense sense);
 209 int scsi_build_sense(uint8_t *in_buf, int in_len,
 210                      uint8_t *buf, int len, bool fixed);
 211
 212 SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
 213                             uint32_t tag, uint32_t lun, void *hba_private);
 214 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
 215                           uint8_t *buf, void *hba_private);
 216 int32_t scsi_req_enqueue(SCSIRequest *req);
 217 void scsi_req_free(SCSIRequest *req);
 218 SCSIRequest *scsi_req_ref(SCSIRequest *req);
 219 void scsi_req_unref(SCSIRequest *req);
 220
 221 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense);
 222 void scsi_req_print(SCSIRequest *req);
 223 void scsi_req_continue(SCSIRequest *req);
 224 void scsi_req_data(SCSIRequest *req, int len);
 225 void scsi_req_complete(SCSIRequest *req, int status);
 226 uint8_t *scsi_req_get_buf(SCSIRequest *req);
 227 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len);
 228 void scsi_req_abort(SCSIRequest *req, int status);
 229 void scsi_req_cancel(SCSIRequest *req);
 230 void scsi_req_retry(SCSIRequest *req);
 231 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense);
 232 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed);
 233 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int target, int lun);
 234
 235 /* scsi-generic.c. */
 236 extern const SCSIReqOps scsi_generic_req_ops;
 237
 238 #endif