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 SCSI_CMD_BUF_SIZE     16
   8
   9 /* scsi-disk.c */
  10 enum scsi_reason {
  11     SCSI_REASON_DONE, /* Command complete.  */
  12     SCSI_REASON_DATA  /* Transfer complete, more data required.  */
  13 };
  14
  15 typedef struct SCSIBus SCSIBus;
  16 typedef struct SCSIDevice SCSIDevice;
  17 typedef struct SCSIDeviceInfo SCSIDeviceInfo;
  18 typedef void (*scsi_completionfn)(SCSIBus *bus, int reason, uint32_t tag,
  19                                   uint32_t arg);
  20
  21 enum SCSIXferMode {
  22     SCSI_XFER_NONE,      /*  TEST_UNIT_READY, ...            */
  23     SCSI_XFER_FROM_DEV,  /*  READ, INQUIRY, MODE_SENSE, ...  */
  24     SCSI_XFER_TO_DEV,    /*  WRITE, MODE_SELECT, ...         */
  25 };
  26
  27 typedef struct SCSISense {
  28     uint8_t key;
  29 } SCSISense;
  30
  31 typedef struct SCSIRequest {
  32     SCSIBus           *bus;
  33     SCSIDevice        *dev;
  34     uint32_t          tag;
  35     uint32_t          lun;
  36     uint32_t          status;
  37     struct {
  38         uint8_t buf[SCSI_CMD_BUF_SIZE];
  39         int len;
  40         size_t xfer;
  41         uint64_t lba;
  42         enum SCSIXferMode mode;
  43     } cmd;
  44     BlockDriverAIOCB  *aiocb;
  45     QTAILQ_ENTRY(SCSIRequest) next;
  46 } SCSIRequest;
  47
  48 struct SCSIDevice
  49 {
  50     DeviceState qdev;
  51     uint32_t id;
  52     DriveInfo *dinfo;
  53     SCSIDeviceInfo *info;
  54     QTAILQ_HEAD(, SCSIRequest) requests;
  55     int blocksize;
  56     int type;
  57     struct SCSISense sense;
  58 };
  59
  60 /* cdrom.c */
  61 int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track);
  62 int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num);
  63
  64 /* scsi-bus.c */
  65 typedef int (*scsi_qdev_initfn)(SCSIDevice *dev);
  66 struct SCSIDeviceInfo {
  67     DeviceInfo qdev;
  68     scsi_qdev_initfn init;
  69     void (*destroy)(SCSIDevice *s);
  70     int32_t (*send_command)(SCSIDevice *s, uint32_t tag, uint8_t *buf,
  71                             int lun);
  72     void (*read_data)(SCSIDevice *s, uint32_t tag);
  73     int (*write_data)(SCSIDevice *s, uint32_t tag);
  74     void (*cancel_io)(SCSIDevice *s, uint32_t tag);
  75     uint8_t *(*get_buf)(SCSIDevice *s, uint32_t tag);
  76 };
  77
  78 typedef void (*SCSIAttachFn)(DeviceState *host, BlockDriverState *bdrv,
  79               int unit);
  80 struct SCSIBus {
  81     BusState qbus;
  82     int busnr;
  83
  84     int tcq, ndev;
  85     scsi_completionfn complete;
  86
  87     SCSIDevice *devs[8];
  88 };
  89
  90 void scsi_bus_new(SCSIBus *bus, DeviceState *host, int tcq, int ndev,
  91                   scsi_completionfn complete);
  92 void scsi_qdev_register(SCSIDeviceInfo *info);
  93
  94 static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
  95 {
  96     return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
  97 }
  98
  99 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, DriveInfo *dinfo, int unit);
 100 void scsi_bus_legacy_handle_cmdline(SCSIBus *bus);
 101
 102 void scsi_dev_clear_sense(SCSIDevice *dev);
 103 void scsi_dev_set_sense(SCSIDevice *dev, uint8_t key);
 104
 105 SCSIRequest *scsi_req_alloc(size_t size, SCSIDevice *d, uint32_t tag, uint32_t lun);
 106 SCSIRequest *scsi_req_find(SCSIDevice *d, uint32_t tag);
 107 void scsi_req_free(SCSIRequest *req);
 108
 109 int scsi_req_parse(SCSIRequest *req, uint8_t *buf);
 110 void scsi_req_print(SCSIRequest *req);
 111 void scsi_req_complete(SCSIRequest *req);
 112
 113 #endif