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 MAX_SCSI_DEVS   255
   9
  10 #define SCSI_CMD_BUF_SIZE     16
  11
  12 /* scsi-disk.c */
  13 enum scsi_reason {
  14     SCSI_REASON_DONE, /* Command complete.  */
  15     SCSI_REASON_DATA  /* Transfer complete, more data required.  */
  16 };
  17
  18 typedef struct SCSIBus SCSIBus;
  19 typedef struct SCSIDevice SCSIDevice;
  20 typedef struct SCSIDeviceInfo SCSIDeviceInfo;
  21 typedef void (*scsi_completionfn)(SCSIBus *bus, int reason, uint32_t tag,
  22                                   uint32_t arg);
  23
  24 enum SCSIXferMode {
  25     SCSI_XFER_NONE,      /*  TEST_UNIT_READY, ...            */
  26     SCSI_XFER_FROM_DEV,  /*  READ, INQUIRY, MODE_SENSE, ...  */
  27     SCSI_XFER_TO_DEV,    /*  WRITE, MODE_SELECT, ...         */
  28 };
  29
  30 typedef struct SCSIRequest {
  31     SCSIBus           *bus;
  32     SCSIDevice        *dev;
  33     uint32_t          tag;
  34     uint32_t          lun;
  35     uint32_t          status;
  36     struct {
  37         uint8_t buf[SCSI_CMD_BUF_SIZE];
  38         int len;
  39         size_t xfer;
  40         uint64_t lba;
  41         enum SCSIXferMode mode;
  42     } cmd;
  43     BlockDriverAIOCB  *aiocb;
  44     bool enqueued;
  45     QTAILQ_ENTRY(SCSIRequest) next;
  46 } SCSIRequest;
  47
  48 struct SCSIDevice
  49 {
  50     DeviceState qdev;
  51     uint32_t id;
  52     BlockConf conf;
  53     SCSIDeviceInfo *info;
  54     QTAILQ_HEAD(, SCSIRequest) requests;
  55     int blocksize;
  56     int type;
  57 };
  58
  59 /* cdrom.c */
  60 int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track);
  61 int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num);
  62
  63 /* scsi-bus.c */
  64 typedef int (*scsi_qdev_initfn)(SCSIDevice *dev);
  65 struct SCSIDeviceInfo {
  66     DeviceInfo qdev;
  67     scsi_qdev_initfn init;
  68     void (*destroy)(SCSIDevice *s);
  69     int32_t (*send_command)(SCSIDevice *s, uint32_t tag, uint8_t *buf,
  70                             int lun);
  71     void (*read_data)(SCSIDevice *s, uint32_t tag);
  72     int (*write_data)(SCSIDevice *s, uint32_t tag);
  73     void (*cancel_io)(SCSIDevice *s, uint32_t tag);
  74     uint8_t *(*get_buf)(SCSIDevice *s, uint32_t tag);
  75 };
  76
  77 typedef void (*SCSIAttachFn)(DeviceState *host, BlockDriverState *bdrv,
  78               int unit);
  79 struct SCSIBus {
  80     BusState qbus;
  81     int busnr;
  82
  83     int tcq, ndev;
  84     scsi_completionfn complete;
  85
  86     SCSIDevice *devs[MAX_SCSI_DEVS];
  87 };
  88
  89 void scsi_bus_new(SCSIBus *bus, DeviceState *host, int tcq, int ndev,
  90                   scsi_completionfn complete);
  91 void scsi_qdev_register(SCSIDeviceInfo *info);
  92
  93 static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
  94 {
  95     return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
  96 }
  97
  98 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv,
  99                                       int unit, bool removable);
 100 int scsi_bus_legacy_handle_cmdline(SCSIBus *bus);
 101
 102 SCSIRequest *scsi_req_alloc(size_t size, SCSIDevice *d, uint32_t tag, uint32_t lun);
 103 SCSIRequest *scsi_req_find(SCSIDevice *d, uint32_t tag);
 104 void scsi_req_free(SCSIRequest *req);
 105
 106 int scsi_req_parse(SCSIRequest *req, uint8_t *buf);
 107 void scsi_req_print(SCSIRequest *req);
 108 void scsi_req_complete(SCSIRequest *req);
 109
 110 #endif