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
   7 #define MAX_SCSI_DEVS   255
   8
   9 #define SCSI_CMD_BUF_SIZE     16
  10
  11 typedef struct SCSIBus SCSIBus;
  12 typedef struct SCSIBusOps SCSIBusOps;
  13 typedef struct SCSICommand SCSICommand;
  14 typedef struct SCSIDevice SCSIDevice;
  15 typedef struct SCSIDeviceInfo SCSIDeviceInfo;
  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     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     void *hba_private;
  55     QTAILQ_ENTRY(SCSIRequest) next;
  56 };
  57
  58 struct SCSIDevice
  59 {
  60     DeviceState qdev;
  61     uint32_t id;
  62     BlockConf conf;
  63     SCSIDeviceInfo *info;
  64     SCSISense unit_attention;
  65     uint8_t sense[SCSI_SENSE_BUF_SIZE];
  66     uint32_t sense_len;
  67     QTAILQ_HEAD(, SCSIRequest) requests;
  68     uint32_t lun;
  69     int blocksize;
  70     int type;
  71 };
  72
  73 /* cdrom.c */
  74 int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track);
  75 int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num);
  76
  77 /* scsi-bus.c */
  78 struct SCSIReqOps {
  79     size_t size;
  80     void (*free_req)(SCSIRequest *req);
  81     int32_t (*send_command)(SCSIRequest *req, uint8_t *buf);
  82     void (*read_data)(SCSIRequest *req);
  83     void (*write_data)(SCSIRequest *req);
  84     void (*cancel_io)(SCSIRequest *req);
  85     uint8_t *(*get_buf)(SCSIRequest *req);
  86 };
  87
  88 typedef int (*scsi_qdev_initfn)(SCSIDevice *dev);
  89 struct SCSIDeviceInfo {
  90     DeviceInfo qdev;
  91     scsi_qdev_initfn init;
  92     void (*destroy)(SCSIDevice *s);
  93     SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun,
  94                               void *hba_private);
  95     SCSIReqOps reqops;
  96 };
  97
  98 struct SCSIBusOps {
  99     void (*transfer_data)(SCSIRequest *req, uint32_t arg);
 100     void (*complete)(SCSIRequest *req, uint32_t arg);
 101     void (*cancel)(SCSIRequest *req);
 102 };
 103
 104 struct SCSIBus {
 105     BusState qbus;
 106     int busnr;
 107
 108     SCSISense unit_attention;
 109     int tcq, ndev;
 110     const SCSIBusOps *ops;
 111
 112     SCSIDevice *devs[MAX_SCSI_DEVS];
 113 };
 114
 115 void scsi_bus_new(SCSIBus *bus, DeviceState *host, int tcq, int ndev,
 116                   const SCSIBusOps *ops);
 117 void scsi_qdev_register(SCSIDeviceInfo *info);
 118
 119 static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
 120 {
 121     return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
 122 }
 123
 124 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv,
 125                                       int unit, bool removable);
 126 int scsi_bus_legacy_handle_cmdline(SCSIBus *bus);
 127
 128 /*
 129  * Predefined sense codes
 130  */
 131
 132 /* No sense data available */
 133 extern const struct SCSISense sense_code_NO_SENSE;
 134 /* LUN not ready, Manual intervention required */
 135 extern const struct SCSISense sense_code_LUN_NOT_READY;
 136 /* LUN not ready, Medium not present */
 137 extern const struct SCSISense sense_code_NO_MEDIUM;
 138 /* LUN not ready, medium removal prevented */
 139 extern const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED;
 140 /* Hardware error, internal target failure */
 141 extern const struct SCSISense sense_code_TARGET_FAILURE;
 142 /* Illegal request, invalid command operation code */
 143 extern const struct SCSISense sense_code_INVALID_OPCODE;
 144 /* Illegal request, LBA out of range */
 145 extern const struct SCSISense sense_code_LBA_OUT_OF_RANGE;
 146 /* Illegal request, Invalid field in CDB */
 147 extern const struct SCSISense sense_code_INVALID_FIELD;
 148 /* Illegal request, LUN not supported */
 149 extern const struct SCSISense sense_code_LUN_NOT_SUPPORTED;
 150 /* Illegal request, Saving parameters not supported */
 151 extern const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED;
 152 /* Illegal request, Incompatible format */
 153 extern const struct SCSISense sense_code_INCOMPATIBLE_FORMAT;
 154 /* Illegal request, medium removal prevented */
 155 extern const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED;
 156 /* Command aborted, I/O process terminated */
 157 extern const struct SCSISense sense_code_IO_ERROR;
 158 /* Command aborted, I_T Nexus loss occurred */
 159 extern const struct SCSISense sense_code_I_T_NEXUS_LOSS;
 160 /* Command aborted, Logical Unit failure */
 161 extern const struct SCSISense sense_code_LUN_FAILURE;
 162 /* Unit attention, Power on, reset or bus device reset occurred */
 163 extern const struct SCSISense sense_code_RESET;
 164 /* Unit attention, Medium may have changed*/
 165 extern const struct SCSISense sense_code_MEDIUM_CHANGED;
 166 /* Unit attention, Reported LUNs data has changed */
 167 extern const struct SCSISense sense_code_REPORTED_LUNS_CHANGED;
 168 /* Unit attention, Device internal reset */
 169 extern const struct SCSISense sense_code_DEVICE_INTERNAL_RESET;
 170
 171 #define SENSE_CODE(x) sense_code_ ## x
 172
 173 int scsi_sense_valid(SCSISense sense);
 174
 175 SCSIRequest *scsi_req_alloc(SCSIReqOps *reqops, SCSIDevice *d, uint32_t tag,
 176                             uint32_t lun, void *hba_private);
 177 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
 178                           uint8_t *buf, void *hba_private);
 179 int32_t scsi_req_enqueue(SCSIRequest *req);
 180 void scsi_req_free(SCSIRequest *req);
 181 SCSIRequest *scsi_req_ref(SCSIRequest *req);
 182 void scsi_req_unref(SCSIRequest *req);
 183
 184 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense);
 185 void scsi_req_print(SCSIRequest *req);
 186 void scsi_req_continue(SCSIRequest *req);
 187 void scsi_req_data(SCSIRequest *req, int len);
 188 void scsi_req_complete(SCSIRequest *req, int status);
 189 uint8_t *scsi_req_get_buf(SCSIRequest *req);
 190 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len);
 191 void scsi_req_abort(SCSIRequest *req, int status);
 192 void scsi_req_cancel(SCSIRequest *req);
 193 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense);
 194 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed);
 195
 196 #endif