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