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 SCSIBusOps SCSIBusOps;
  20 typedef struct SCSIDevice SCSIDevice;
  21 typedef struct SCSIDeviceInfo SCSIDeviceInfo;
  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          refcount;
  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     void (*free_req)(SCSIRequest *req);
  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 struct SCSIBusOps {
  79     void (*complete)(SCSIBus *bus, int reason, uint32_t tag, uint32_t arg);
  80 };
  81
  82 struct SCSIBus {
  83     BusState qbus;
  84     int busnr;
  85
  86     int tcq, ndev;
  87     const SCSIBusOps *ops;
  88
  89     SCSIDevice *devs[MAX_SCSI_DEVS];
  90 };
  91
  92 void scsi_bus_new(SCSIBus *bus, DeviceState *host, int tcq, int ndev,
  93                   const SCSIBusOps *ops);
  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,
 102                                       int unit, bool removable);
 103 int scsi_bus_legacy_handle_cmdline(SCSIBus *bus);
 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 void scsi_req_dequeue(SCSIRequest *req);
 109 SCSIRequest *scsi_req_ref(SCSIRequest *req);
 110 void scsi_req_unref(SCSIRequest *req);
 111
 112 int scsi_req_parse(SCSIRequest *req, uint8_t *buf);
 113 void scsi_req_print(SCSIRequest *req);
 114 void scsi_req_data(SCSIRequest *req, int len);
 115 void scsi_req_complete(SCSIRequest *req);
 116
 117 #endif