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 "block_int.h"
   7
   8 #define SCSI_CMD_BUF_SIZE     16
   9
  10 /* scsi-disk.c */
  11 enum scsi_reason {
  12     SCSI_REASON_DONE, /* Command complete.  */
  13     SCSI_REASON_DATA  /* Transfer complete, more data required.  */
  14 };
  15
  16 typedef struct SCSIBus SCSIBus;
  17 typedef struct SCSIDevice SCSIDevice;
  18 typedef struct SCSIDeviceInfo SCSIDeviceInfo;
  19 typedef void (*scsi_completionfn)(SCSIBus *bus, int reason, uint32_t tag,
  20                                   uint32_t arg);
  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 } SCSISense;
  31
  32 typedef struct SCSIRequest {
  33     SCSIBus           *bus;
  34     SCSIDevice        *dev;
  35     uint32_t          tag;
  36     uint32_t          lun;
  37     uint32_t          status;
  38     struct {
  39         uint8_t buf[SCSI_CMD_BUF_SIZE];
  40         int len;
  41         size_t xfer;
  42         uint64_t lba;
  43         enum SCSIXferMode mode;
  44     } cmd;
  45     BlockDriverAIOCB  *aiocb;
  46     bool enqueued;
  47     QTAILQ_ENTRY(SCSIRequest) next;
  48 } SCSIRequest;
  49
  50 struct SCSIDevice
  51 {
  52     DeviceState qdev;
  53     uint32_t id;
  54     BlockConf conf;
  55     SCSIDeviceInfo *info;
  56     QTAILQ_HEAD(, SCSIRequest) requests;
  57     int blocksize;
  58     int type;
  59     struct SCSISense sense;
  60 };
  61
  62 /* cdrom.c */
  63 int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track);
  64 int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num);
  65
  66 /* scsi-bus.c */
  67 typedef int (*scsi_qdev_initfn)(SCSIDevice *dev);
  68 struct SCSIDeviceInfo {
  69     DeviceInfo qdev;
  70     scsi_qdev_initfn init;
  71     void (*destroy)(SCSIDevice *s);
  72     int32_t (*send_command)(SCSIDevice *s, uint32_t tag, uint8_t *buf,
  73                             int lun);
  74     void (*read_data)(SCSIDevice *s, uint32_t tag);
  75     int (*write_data)(SCSIDevice *s, uint32_t tag);
  76     void (*cancel_io)(SCSIDevice *s, uint32_t tag);
  77     uint8_t *(*get_buf)(SCSIDevice *s, uint32_t tag);
  78 };
  79
  80 typedef void (*SCSIAttachFn)(DeviceState *host, BlockDriverState *bdrv,
  81               int unit);
  82 struct SCSIBus {
  83     BusState qbus;
  84     int busnr;
  85
  86     int tcq, ndev;
  87     scsi_completionfn complete;
  88
  89     SCSIDevice *devs[8];
  90 };
  91
  92 void scsi_bus_new(SCSIBus *bus, DeviceState *host, int tcq, int ndev,
  93                   scsi_completionfn complete);
  94 void scsi_qdev_register(SCSIDeviceInfo *info);
  95
  96 static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
  97 {
  98     return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
  99 }
 100
 101 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv, int unit);
 102 int scsi_bus_legacy_handle_cmdline(SCSIBus *bus);
 103
 104 void scsi_dev_clear_sense(SCSIDevice *dev);
 105 void scsi_dev_set_sense(SCSIDevice *dev, uint8_t key);
 106
 107 SCSIRequest *scsi_req_alloc(size_t size, SCSIDevice *d, uint32_t tag, uint32_t lun);
 108 SCSIRequest *scsi_req_find(SCSIDevice *d, uint32_t tag);
 109 void scsi_req_free(SCSIRequest *req);
 110
 111 int scsi_req_parse(SCSIRequest *req, uint8_t *buf);
 112 void scsi_req_print(SCSIRequest *req);
 113 void scsi_req_complete(SCSIRequest *req);
 114
 115 #endif