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     SCSICommand       cmd;
  50     BlockDriverAIOCB  *aiocb;
  51     uint8_t sense[SCSI_SENSE_BUF_SIZE];
  52     uint32_t sense_len;
  53     bool enqueued;
  54     bool io_canceled;
  55     bool retry;
  56     void *hba_private;
  57     QTAILQ_ENTRY(SCSIRequest) next;
  58 };
  59
  60 #define TYPE_SCSI_DEVICE "scsi-device"
  61 #define SCSI_DEVICE(obj) \
  62      OBJECT_CHECK(SCSIDevice, (obj), TYPE_SCSI_DEVICE)
  63 #define SCSI_DEVICE_CLASS(klass) \
  64      OBJECT_CLASS_CHECK(SCSIDeviceClass, (klass), TYPE_SCSI_DEVICE)
  65 #define SCSI_DEVICE_GET_CLASS(obj) \
  66      OBJECT_GET_CLASS(SCSIDeviceClass, (obj), TYPE_SCSI_DEVICE)
  67
  68 typedef struct SCSIDeviceClass {
  69     DeviceClass parent_class;
  70     int (*init)(SCSIDevice *dev);
  71     void (*destroy)(SCSIDevice *s);
  72     SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun,
  73                               uint8_t *buf, void *hba_private);
  74     void (*unit_attention_reported)(SCSIDevice *s);
  75 } SCSIDeviceClass;
  76
  77 struct SCSIDevice
  78 {
  79     DeviceState qdev;
  80     VMChangeStateEntry *vmsentry;
  81     QEMUBH *bh;
  82     uint32_t id;
  83     BlockConf conf;
  84     SCSISense unit_attention;
  85     bool sense_is_ua;
  86     uint8_t sense[SCSI_SENSE_BUF_SIZE];
  87     uint32_t sense_len;
  88     QTAILQ_HEAD(, SCSIRequest) requests;
  89     uint32_t channel;
  90     uint32_t lun;
  91     int blocksize;
  92     int type;
  93     uint64_t max_lba;
  94 };
  95
  96 /* cdrom.c */
  97 int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track);
  98 int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num);
  99
 100 /* scsi-bus.c */
 101 struct SCSIReqOps {
 102     size_t size;
 103     void (*free_req)(SCSIRequest *req);
 104     int32_t (*send_command)(SCSIRequest *req, uint8_t *buf);
 105     void (*read_data)(SCSIRequest *req);
 106     void (*write_data)(SCSIRequest *req);
 107     void (*cancel_io)(SCSIRequest *req);
 108     uint8_t *(*get_buf)(SCSIRequest *req);
 109 };
 110
 111 struct SCSIBusInfo {
 112     int tcq;
 113     int max_channel, max_target, max_lun;
 114     void (*transfer_data)(SCSIRequest *req, uint32_t arg);
 115     void (*complete)(SCSIRequest *req, uint32_t arg);
 116     void (*cancel)(SCSIRequest *req);
 117 };
 118
 119 struct SCSIBus {
 120     BusState qbus;
 121     int busnr;
 122
 123     SCSISense unit_attention;
 124     const SCSIBusInfo *info;
 125 };
 126
 127 void scsi_bus_new(SCSIBus *bus, DeviceState *host, const SCSIBusInfo *info);
 128
 129 static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
 130 {
 131     return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
 132 }
 133
 134 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv,
 135                                       int unit, bool removable, int bootindex);
 136 int scsi_bus_legacy_handle_cmdline(SCSIBus *bus);
 137
 138 /*
 139  * Predefined sense codes
 140  */
 141
 142 /* No sense data available */
 143 extern const struct SCSISense sense_code_NO_SENSE;
 144 /* LUN not ready, Manual intervention required */
 145 extern const struct SCSISense sense_code_LUN_NOT_READY;
 146 /* LUN not ready, Medium not present */
 147 extern const struct SCSISense sense_code_NO_MEDIUM;
 148 /* LUN not ready, medium removal prevented */
 149 extern const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED;
 150 /* Hardware error, internal target failure */
 151 extern const struct SCSISense sense_code_TARGET_FAILURE;
 152 /* Illegal request, invalid command operation code */
 153 extern const struct SCSISense sense_code_INVALID_OPCODE;
 154 /* Illegal request, LBA out of range */
 155 extern const struct SCSISense sense_code_LBA_OUT_OF_RANGE;
 156 /* Illegal request, Invalid field in CDB */
 157 extern const struct SCSISense sense_code_INVALID_FIELD;
 158 /* Illegal request, LUN not supported */
 159 extern const struct SCSISense sense_code_LUN_NOT_SUPPORTED;
 160 /* Illegal request, Saving parameters not supported */
 161 extern const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED;
 162 /* Illegal request, Incompatible format */
 163 extern const struct SCSISense sense_code_INCOMPATIBLE_FORMAT;
 164 /* Illegal request, medium removal prevented */
 165 extern const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED;
 166 /* Command aborted, I/O process terminated */
 167 extern const struct SCSISense sense_code_IO_ERROR;
 168 /* Command aborted, I_T Nexus loss occurred */
 169 extern const struct SCSISense sense_code_I_T_NEXUS_LOSS;
 170 /* Command aborted, Logical Unit failure */
 171 extern const struct SCSISense sense_code_LUN_FAILURE;
 172 /* LUN not ready, Medium not present */
 173 extern const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM;
 174 /* Unit attention, Power on, reset or bus device reset occurred */
 175 extern const struct SCSISense sense_code_RESET;
 176 /* Unit attention, Medium may have changed*/
 177 extern const struct SCSISense sense_code_MEDIUM_CHANGED;
 178 /* Unit attention, Reported LUNs data has changed */
 179 extern const struct SCSISense sense_code_REPORTED_LUNS_CHANGED;
 180 /* Unit attention, Device internal reset */
 181 extern const struct SCSISense sense_code_DEVICE_INTERNAL_RESET;
 182
 183 #define SENSE_CODE(x) sense_code_ ## x
 184
 185 int scsi_sense_valid(SCSISense sense);
 186 int scsi_build_sense(uint8_t *in_buf, int in_len,
 187                      uint8_t *buf, int len, bool fixed);
 188
 189 SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
 190                             uint32_t tag, uint32_t lun, void *hba_private);
 191 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
 192                           uint8_t *buf, void *hba_private);
 193 int32_t scsi_req_enqueue(SCSIRequest *req);
 194 void scsi_req_free(SCSIRequest *req);
 195 SCSIRequest *scsi_req_ref(SCSIRequest *req);
 196 void scsi_req_unref(SCSIRequest *req);
 197
 198 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense);
 199 void scsi_req_print(SCSIRequest *req);
 200 void scsi_req_continue(SCSIRequest *req);
 201 void scsi_req_data(SCSIRequest *req, int len);
 202 void scsi_req_complete(SCSIRequest *req, int status);
 203 uint8_t *scsi_req_get_buf(SCSIRequest *req);
 204 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len);
 205 void scsi_req_abort(SCSIRequest *req, int status);
 206 void scsi_req_cancel(SCSIRequest *req);
 207 void scsi_req_retry(SCSIRequest *req);
 208 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense);
 209 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed);
 210 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int target, int lun);
 211
 212 /* scsi-generic.c. */
 213 extern const SCSIReqOps scsi_generic_req_ops;
 214
 215 #endif