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