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 "hw/block-common.h"
   7 #include "sysemu.h"
   8
   9 #define MAX_SCSI_DEVS   255
  10
  11 #define SCSI_CMD_BUF_SIZE     16
  12
  13 typedef struct SCSIBus SCSIBus;
  14 typedef struct SCSIBusInfo SCSIBusInfo;
  15 typedef struct SCSICommand SCSICommand;
  16 typedef struct SCSIDevice SCSIDevice;
  17 typedef struct SCSIRequest SCSIRequest;
  18 typedef struct SCSIReqOps SCSIReqOps;
  19
  20 enum SCSIXferMode {
  21     SCSI_XFER_NONE,      /*  TEST_UNIT_READY, ...            */
  22     SCSI_XFER_FROM_DEV,  /*  READ, INQUIRY, MODE_SENSE, ...  */
  23     SCSI_XFER_TO_DEV,    /*  WRITE, MODE_SELECT, ...         */
  24 };
  25
  26 typedef struct SCSISense {
  27     uint8_t key;
  28     uint8_t asc;
  29     uint8_t ascq;
  30 } SCSISense;
  31
  32 #define SCSI_SENSE_BUF_SIZE 96
  33
  34 struct SCSICommand {
  35     uint8_t buf[SCSI_CMD_BUF_SIZE];
  36     int len;
  37     size_t xfer;
  38     uint64_t lba;
  39     enum SCSIXferMode mode;
  40 };
  41
  42 struct SCSIRequest {
  43     SCSIBus           *bus;
  44     SCSIDevice        *dev;
  45     const SCSIReqOps  *ops;
  46     uint32_t          refcount;
  47     uint32_t          tag;
  48     uint32_t          lun;
  49     uint32_t          status;
  50     size_t            resid;
  51     SCSICommand       cmd;
  52     BlockDriverAIOCB  *aiocb;
  53     QEMUSGList        *sg;
  54     bool              dma_started;
  55     uint8_t sense[SCSI_SENSE_BUF_SIZE];
  56     uint32_t sense_len;
  57     bool enqueued;
  58     bool io_canceled;
  59     bool retry;
  60     void *hba_private;
  61     QTAILQ_ENTRY(SCSIRequest) next;
  62 };
  63
  64 #define TYPE_SCSI_DEVICE "scsi-device"
  65 #define SCSI_DEVICE(obj) \
  66      OBJECT_CHECK(SCSIDevice, (obj), TYPE_SCSI_DEVICE)
  67 #define SCSI_DEVICE_CLASS(klass) \
  68      OBJECT_CLASS_CHECK(SCSIDeviceClass, (klass), TYPE_SCSI_DEVICE)
  69 #define SCSI_DEVICE_GET_CLASS(obj) \
  70      OBJECT_GET_CLASS(SCSIDeviceClass, (obj), TYPE_SCSI_DEVICE)
  71
  72 typedef struct SCSIDeviceClass {
  73     DeviceClass parent_class;
  74     int (*init)(SCSIDevice *dev);
  75     void (*destroy)(SCSIDevice *s);
  76     SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun,
  77                               uint8_t *buf, void *hba_private);
  78     void (*unit_attention_reported)(SCSIDevice *s);
  79 } SCSIDeviceClass;
  80
  81 struct SCSIDevice
  82 {
  83     DeviceState qdev;
  84     VMChangeStateEntry *vmsentry;
  85     QEMUBH *bh;
  86     uint32_t id;
  87     BlockConf conf;
  88     SCSISense unit_attention;
  89     bool sense_is_ua;
  90     uint8_t sense[SCSI_SENSE_BUF_SIZE];
  91     uint32_t sense_len;
  92     QTAILQ_HEAD(, SCSIRequest) requests;
  93     uint32_t channel;
  94     uint32_t lun;
  95     int blocksize;
  96     int type;
  97     uint64_t max_lba;
  98 };
  99
 100 extern const VMStateDescription vmstate_scsi_device;
 101
 102 #define VMSTATE_SCSI_DEVICE(_field, _state) {                        \
 103     .name       = (stringify(_field)),                               \
 104     .size       = sizeof(SCSIDevice),                                \
 105     .vmsd       = &vmstate_scsi_device,                              \
 106     .flags      = VMS_STRUCT,                                        \
 107     .offset     = vmstate_offset_value(_state, _field, SCSIDevice),  \
 108 }
 109
 110 /* cdrom.c */
 111 int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track);
 112 int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num);
 113
 114 /* scsi-bus.c */
 115 struct SCSIReqOps {
 116     size_t size;
 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     void (*cancel_io)(SCSIRequest *req);
 122     uint8_t *(*get_buf)(SCSIRequest *req);
 123
 124     void (*save_request)(QEMUFile *f, SCSIRequest *req);
 125     void (*load_request)(QEMUFile *f, SCSIRequest *req);
 126 };
 127
 128 struct SCSIBusInfo {
 129     int tcq;
 130     int max_channel, max_target, max_lun;
 131     void (*transfer_data)(SCSIRequest *req, uint32_t arg);
 132     void (*complete)(SCSIRequest *req, uint32_t arg, size_t resid);
 133     void (*cancel)(SCSIRequest *req);
 134     QEMUSGList *(*get_sg_list)(SCSIRequest *req);
 135
 136     void (*save_request)(QEMUFile *f, SCSIRequest *req);
 137     void *(*load_request)(QEMUFile *f, SCSIRequest *req);
 138 };
 139
 140 #define TYPE_SCSI_BUS "SCSI"
 141 #define SCSI_BUS(obj) OBJECT_CHECK(SCSIBus, (obj), TYPE_SCSI_BUS)
 142
 143 struct SCSIBus {
 144     BusState qbus;
 145     int busnr;
 146
 147     SCSISense unit_attention;
 148     const SCSIBusInfo *info;
 149 };
 150
 151 void scsi_bus_new(SCSIBus *bus, DeviceState *host, const SCSIBusInfo *info);
 152
 153 static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
 154 {
 155     return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
 156 }
 157
 158 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv,
 159                                       int unit, bool removable, int bootindex);
 160 int scsi_bus_legacy_handle_cmdline(SCSIBus *bus);
 161
 162 /*
 163  * Predefined sense codes
 164  */
 165
 166 /* No sense data available */
 167 extern const struct SCSISense sense_code_NO_SENSE;
 168 /* LUN not ready, Manual intervention required */
 169 extern const struct SCSISense sense_code_LUN_NOT_READY;
 170 /* LUN not ready, Medium not present */
 171 extern const struct SCSISense sense_code_NO_MEDIUM;
 172 /* LUN not ready, medium removal prevented */
 173 extern const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED;
 174 /* Hardware error, internal target failure */
 175 extern const struct SCSISense sense_code_TARGET_FAILURE;
 176 /* Illegal request, invalid command operation code */
 177 extern const struct SCSISense sense_code_INVALID_OPCODE;
 178 /* Illegal request, LBA out of range */
 179 extern const struct SCSISense sense_code_LBA_OUT_OF_RANGE;
 180 /* Illegal request, Invalid field in CDB */
 181 extern const struct SCSISense sense_code_INVALID_FIELD;
 182 /* Illegal request, LUN not supported */
 183 extern const struct SCSISense sense_code_LUN_NOT_SUPPORTED;
 184 /* Illegal request, Saving parameters not supported */
 185 extern const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED;
 186 /* Illegal request, Incompatible format */
 187 extern const struct SCSISense sense_code_INCOMPATIBLE_FORMAT;
 188 /* Illegal request, medium removal prevented */
 189 extern const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED;
 190 /* Command aborted, I/O process terminated */
 191 extern const struct SCSISense sense_code_IO_ERROR;
 192 /* Command aborted, I_T Nexus loss occurred */
 193 extern const struct SCSISense sense_code_I_T_NEXUS_LOSS;
 194 /* Command aborted, Logical Unit failure */
 195 extern const struct SCSISense sense_code_LUN_FAILURE;
 196 /* LUN not ready, Medium not present */
 197 extern const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM;
 198 /* Unit attention, Power on, reset or bus device reset occurred */
 199 extern const struct SCSISense sense_code_RESET;
 200 /* Unit attention, Medium may have changed*/
 201 extern const struct SCSISense sense_code_MEDIUM_CHANGED;
 202 /* Unit attention, Reported LUNs data has changed */
 203 extern const struct SCSISense sense_code_REPORTED_LUNS_CHANGED;
 204 /* Unit attention, Device internal reset */
 205 extern const struct SCSISense sense_code_DEVICE_INTERNAL_RESET;
 206
 207 #define SENSE_CODE(x) sense_code_ ## x
 208
 209 int scsi_sense_valid(SCSISense sense);
 210 int scsi_build_sense(uint8_t *in_buf, int in_len,
 211                      uint8_t *buf, int len, bool fixed);
 212
 213 SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
 214                             uint32_t tag, uint32_t lun, void *hba_private);
 215 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
 216                           uint8_t *buf, void *hba_private);
 217 int32_t scsi_req_enqueue(SCSIRequest *req);
 218 void scsi_req_free(SCSIRequest *req);
 219 SCSIRequest *scsi_req_ref(SCSIRequest *req);
 220 void scsi_req_unref(SCSIRequest *req);
 221
 222 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense);
 223 void scsi_req_print(SCSIRequest *req);
 224 void scsi_req_continue(SCSIRequest *req);
 225 void scsi_req_data(SCSIRequest *req, int len);
 226 void scsi_req_complete(SCSIRequest *req, int status);
 227 uint8_t *scsi_req_get_buf(SCSIRequest *req);
 228 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len);
 229 void scsi_req_abort(SCSIRequest *req, int status);
 230 void scsi_req_cancel(SCSIRequest *req);
 231 void scsi_req_retry(SCSIRequest *req);
 232 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense);
 233 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed);
 234 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int target, int lun);
 235
 236 /* scsi-generic.c. */
 237 extern const SCSIReqOps scsi_generic_req_ops;
 238
 239 #endif