include/hw/scsi/scsi.h

   1 #ifndef QEMU_HW_SCSI_H
   2 #define QEMU_HW_SCSI_H
   3
   4 #include "hw/qdev.h"
   5 #include "block/block.h"
   6 #include "hw/block/block.h"
   7 #include "sysemu/sysemu.h"
   8
   9 #define MAX_SCSI_DEVS   255
  10
  11 #define SCSI_CMD_BUF_SIZE     16
  12 #define SCSI_SENSE_LEN      18
  13 #define SCSI_INQUIRY_LEN    36
  14
  15 typedef struct SCSIBus SCSIBus;
  16 typedef struct SCSIBusInfo SCSIBusInfo;
  17 typedef struct SCSICommand SCSICommand;
  18 typedef struct SCSIDevice SCSIDevice;
  19 typedef struct SCSIRequest SCSIRequest;
  20 typedef struct SCSIReqOps SCSIReqOps;
  21
  22 enum SCSIXferMode {
  23     SCSI_XFER_NONE,      /*  TEST_UNIT_READY, ...            */
  24     SCSI_XFER_FROM_DEV,  /*  READ, INQUIRY, MODE_SENSE, ...  */
  25     SCSI_XFER_TO_DEV,    /*  WRITE, MODE_SELECT, ...         */
  26 };
  27
  28 typedef struct SCSISense {
  29     uint8_t key;
  30     uint8_t asc;
  31     uint8_t ascq;
  32 } SCSISense;
  33
  34 #define SCSI_SENSE_BUF_SIZE 252
  35
  36 struct SCSICommand {
  37     uint8_t buf[SCSI_CMD_BUF_SIZE];
  38     int len;
  39     size_t xfer;
  40     uint64_t lba;
  41     enum SCSIXferMode mode;
  42 };
  43
  44 struct SCSIRequest {
  45     SCSIBus           *bus;
  46     SCSIDevice        *dev;
  47     const SCSIReqOps  *ops;
  48     uint32_t          refcount;
  49     uint32_t          tag;
  50     uint32_t          lun;
  51     uint32_t          status;
  52     size_t            resid;
  53     SCSICommand       cmd;
  54     BlockDriverAIOCB  *aiocb;
  55     QEMUSGList        *sg;
  56     bool              dma_started;
  57     uint8_t sense[SCSI_SENSE_BUF_SIZE];
  58     uint32_t sense_len;
  59     bool enqueued;
  60     bool io_canceled;
  61     bool retry;
  62     void *hba_private;
  63     QTAILQ_ENTRY(SCSIRequest) next;
  64 };
  65
  66 #define TYPE_SCSI_DEVICE "scsi-device"
  67 #define SCSI_DEVICE(obj) \
  68      OBJECT_CHECK(SCSIDevice, (obj), TYPE_SCSI_DEVICE)
  69 #define SCSI_DEVICE_CLASS(klass) \
  70      OBJECT_CLASS_CHECK(SCSIDeviceClass, (klass), TYPE_SCSI_DEVICE)
  71 #define SCSI_DEVICE_GET_CLASS(obj) \
  72      OBJECT_GET_CLASS(SCSIDeviceClass, (obj), TYPE_SCSI_DEVICE)
  73
  74 typedef struct SCSIDeviceClass {
  75     DeviceClass parent_class;
  76     int (*init)(SCSIDevice *dev);
  77     void (*destroy)(SCSIDevice *s);
  78     SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun,
  79                               uint8_t *buf, void *hba_private);
  80     void (*unit_attention_reported)(SCSIDevice *s);
  81 } SCSIDeviceClass;
  82
  83 struct SCSIDevice
  84 {
  85     DeviceState qdev;
  86     VMChangeStateEntry *vmsentry;
  87     QEMUBH *bh;
  88     uint32_t id;
  89     BlockConf conf;
  90     SCSISense unit_attention;
  91     bool sense_is_ua;
  92     uint8_t sense[SCSI_SENSE_BUF_SIZE];
  93     uint32_t sense_len;
  94     QTAILQ_HEAD(, SCSIRequest) requests;
  95     uint32_t channel;
  96     uint32_t lun;
  97     int blocksize;
  98     int type;
  99     uint64_t max_lba;
 100 };
 101
 102 extern const VMStateDescription vmstate_scsi_device;
 103
 104 #define VMSTATE_SCSI_DEVICE(_field, _state) {                        \
 105     .name       = (stringify(_field)),                               \
 106     .size       = sizeof(SCSIDevice),                                \
 107     .vmsd       = &vmstate_scsi_device,                              \
 108     .flags      = VMS_STRUCT,                                        \
 109     .offset     = vmstate_offset_value(_state, _field, SCSIDevice),  \
 110 }
 111
 112 /* cdrom.c */
 113 int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track);
 114 int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num);
 115
 116 /* scsi-bus.c */
 117 struct SCSIReqOps {
 118     size_t size;
 119     void (*free_req)(SCSIRequest *req);
 120     int32_t (*send_command)(SCSIRequest *req, uint8_t *buf);
 121     void (*read_data)(SCSIRequest *req);
 122     void (*write_data)(SCSIRequest *req);
 123     void (*cancel_io)(SCSIRequest *req);
 124     uint8_t *(*get_buf)(SCSIRequest *req);
 125
 126     void (*save_request)(QEMUFile *f, SCSIRequest *req);
 127     void (*load_request)(QEMUFile *f, SCSIRequest *req);
 128 };
 129
 130 struct SCSIBusInfo {
 131     int tcq;
 132     int max_channel, max_target, max_lun;
 133     void (*transfer_data)(SCSIRequest *req, uint32_t arg);
 134     void (*complete)(SCSIRequest *req, uint32_t arg, size_t resid);
 135     void (*cancel)(SCSIRequest *req);
 136     void (*hotplug)(SCSIBus *bus, SCSIDevice *dev);
 137     void (*hot_unplug)(SCSIBus *bus, SCSIDevice *dev);
 138     void (*change)(SCSIBus *bus, SCSIDevice *dev, SCSISense sense);
 139     QEMUSGList *(*get_sg_list)(SCSIRequest *req);
 140
 141     void (*save_request)(QEMUFile *f, SCSIRequest *req);
 142     void *(*load_request)(QEMUFile *f, SCSIRequest *req);
 143     void (*free_request)(SCSIBus *bus, void *priv);
 144 };
 145
 146 #define TYPE_SCSI_BUS "SCSI"
 147 #define SCSI_BUS(obj) OBJECT_CHECK(SCSIBus, (obj), TYPE_SCSI_BUS)
 148
 149 struct SCSIBus {
 150     BusState qbus;
 151     int busnr;
 152
 153     SCSISense unit_attention;
 154     const SCSIBusInfo *info;
 155 };
 156
 157 void scsi_bus_new(SCSIBus *bus, size_t bus_size, DeviceState *host,
 158                   const SCSIBusInfo *info, const char *bus_name);
 159
 160 static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
 161 {
 162     return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
 163 }
 164
 165 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv,
 166                                       int unit, bool removable, int bootindex,
 167                                       const char *serial, Error **errp);
 168 void scsi_bus_legacy_handle_cmdline(SCSIBus *bus, Error **errp);
 169
 170 /*
 171  * Predefined sense codes
 172  */
 173
 174 /* No sense data available */
 175 extern const struct SCSISense sense_code_NO_SENSE;
 176 /* LUN not ready, Manual intervention required */
 177 extern const struct SCSISense sense_code_LUN_NOT_READY;
 178 /* LUN not ready, Medium not present */
 179 extern const struct SCSISense sense_code_NO_MEDIUM;
 180 /* LUN not ready, medium removal prevented */
 181 extern const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED;
 182 /* Hardware error, internal target failure */
 183 extern const struct SCSISense sense_code_TARGET_FAILURE;
 184 /* Illegal request, invalid command operation code */
 185 extern const struct SCSISense sense_code_INVALID_OPCODE;
 186 /* Illegal request, LBA out of range */
 187 extern const struct SCSISense sense_code_LBA_OUT_OF_RANGE;
 188 /* Illegal request, Invalid field in CDB */
 189 extern const struct SCSISense sense_code_INVALID_FIELD;
 190 /* Illegal request, Invalid field in parameter list */
 191 extern const struct SCSISense sense_code_INVALID_PARAM;
 192 /* Illegal request, Parameter list length error */
 193 extern const struct SCSISense sense_code_INVALID_PARAM_LEN;
 194 /* Illegal request, LUN not supported */
 195 extern const struct SCSISense sense_code_LUN_NOT_SUPPORTED;
 196 /* Illegal request, Saving parameters not supported */
 197 extern const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED;
 198 /* Illegal request, Incompatible format */
 199 extern const struct SCSISense sense_code_INCOMPATIBLE_FORMAT;
 200 /* Illegal request, medium removal prevented */
 201 extern const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED;
 202 /* Illegal request, Invalid Transfer Tag */
 203 extern const struct SCSISense sense_code_INVALID_TAG;
 204 /* Command aborted, I/O process terminated */
 205 extern const struct SCSISense sense_code_IO_ERROR;
 206 /* Command aborted, I_T Nexus loss occurred */
 207 extern const struct SCSISense sense_code_I_T_NEXUS_LOSS;
 208 /* Command aborted, Logical Unit failure */
 209 extern const struct SCSISense sense_code_LUN_FAILURE;
 210 /* Command aborted, Overlapped Commands Attempted */
 211 extern const struct SCSISense sense_code_OVERLAPPED_COMMANDS;
 212 /* LUN not ready, Capacity data has changed */
 213 extern const struct SCSISense sense_code_CAPACITY_CHANGED;
 214 /* LUN not ready, Medium not present */
 215 extern const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM;
 216 /* Unit attention, Power on, reset or bus device reset occurred */
 217 extern const struct SCSISense sense_code_RESET;
 218 /* Unit attention, Medium may have changed*/
 219 extern const struct SCSISense sense_code_MEDIUM_CHANGED;
 220 /* Unit attention, Reported LUNs data has changed */
 221 extern const struct SCSISense sense_code_REPORTED_LUNS_CHANGED;
 222 /* Unit attention, Device internal reset */
 223 extern const struct SCSISense sense_code_DEVICE_INTERNAL_RESET;
 224 /* Data Protection, Write Protected */
 225 extern const struct SCSISense sense_code_WRITE_PROTECTED;
 226
 227 #define SENSE_CODE(x) sense_code_ ## x
 228
 229 uint32_t scsi_data_cdb_length(uint8_t *buf);
 230 uint32_t scsi_cdb_length(uint8_t *buf);
 231 int scsi_sense_valid(SCSISense sense);
 232 int scsi_build_sense(uint8_t *in_buf, int in_len,
 233                      uint8_t *buf, int len, bool fixed);
 234
 235 SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
 236                             uint32_t tag, uint32_t lun, void *hba_private);
 237 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
 238                           uint8_t *buf, void *hba_private);
 239 int32_t scsi_req_enqueue(SCSIRequest *req);
 240 void scsi_req_free(SCSIRequest *req);
 241 SCSIRequest *scsi_req_ref(SCSIRequest *req);
 242 void scsi_req_unref(SCSIRequest *req);
 243
 244 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense);
 245 void scsi_req_print(SCSIRequest *req);
 246 void scsi_req_continue(SCSIRequest *req);
 247 void scsi_req_data(SCSIRequest *req, int len);
 248 void scsi_req_complete(SCSIRequest *req, int status);
 249 uint8_t *scsi_req_get_buf(SCSIRequest *req);
 250 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len);
 251 void scsi_req_abort(SCSIRequest *req, int status);
 252 void scsi_req_cancel(SCSIRequest *req);
 253 void scsi_req_retry(SCSIRequest *req);
 254 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense);
 255 void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense);
 256 void scsi_device_report_change(SCSIDevice *dev, SCSISense sense);
 257 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed);
 258 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int target, int lun);
 259
 260 /* scsi-generic.c. */
 261 extern const SCSIReqOps scsi_generic_req_ops;
 262
 263 #endif