LXR qemu/include/hw/xen/xen

   1#ifndef QEMU_HW_XEN_PVDEV_H
   2#define QEMU_HW_XEN_PVDEV_H
   3
   4#include "hw/qdev-core.h"
   5#include "hw/xen/xen_backend_ops.h"
   6
   7/* ------------------------------------------------------------- */
   8
   9#define XEN_BUFSIZE 1024
  10
  11struct XenLegacyDevice;
  12
  13/* driver uses grant tables  ->  open gntdev device (xendev->gnttabdev) */
  14#define DEVOPS_FLAG_NEED_GNTDEV   1
  15/* don't expect frontend doing correct state transitions (aka console quirk) */
  16#define DEVOPS_FLAG_IGNORE_STATE  2
  17
  18struct XenDevOps {
  19    size_t    size;
  20    uint32_t  flags;
  21    void      (*alloc)(struct XenLegacyDevice *xendev);
  22    int       (*init)(struct XenLegacyDevice *xendev);
  23    int       (*initialise)(struct XenLegacyDevice *xendev);
  24    void      (*connected)(struct XenLegacyDevice *xendev);
  25    void      (*event)(struct XenLegacyDevice *xendev);
  26    void      (*disconnect)(struct XenLegacyDevice *xendev);
  27    int       (*free)(struct XenLegacyDevice *xendev);
  28    void      (*backend_changed)(struct XenLegacyDevice *xendev,
  29                                 const char *node);
  30    void      (*frontend_changed)(struct XenLegacyDevice *xendev,
  31                                  const char *node);
  32    int       (*backend_register)(void);
  33};
  34
  35struct XenLegacyDevice {
  36    DeviceState        qdev;
  37    const char         *type;
  38    int                dom;
  39    int                dev;
  40    char               name[64];
  41    int                debug;
  42
  43    struct qemu_xs_watch *watch;
  44    enum xenbus_state  be_state;
  45    enum xenbus_state  fe_state;
  46    int                online;
  47    char               be[XEN_BUFSIZE];
  48    char               *fe;
  49    char               *protocol;
  50    int                remote_port;
  51    int                local_port;
  52
  53    xenevtchn_handle   *evtchndev;
  54    xengnttab_handle   *gnttabdev;
  55
  56    struct XenDevOps   *ops;
  57    QTAILQ_ENTRY(XenLegacyDevice) next;
  58};
  59
  60/* ------------------------------------------------------------- */
  61
  62/* xenstore helper functions */
  63int xenstore_write_str(const char *base, const char *node, const char *val);
  64int xenstore_write_int(const char *base, const char *node, int ival);
  65int xenstore_write_int64(const char *base, const char *node, int64_t ival);
  66char *xenstore_read_str(const char *base, const char *node);
  67int xenstore_read_int(const char *base, const char *node, int *ival);
  68int xenstore_read_uint64(const char *base, const char *node, uint64_t *uval);
  69
  70const char *xenbus_strstate(enum xenbus_state state);
  71
  72void xen_pv_evtchn_event(void *opaque);
  73void xen_pv_insert_xendev(struct XenLegacyDevice *xendev);
  74void xen_pv_del_xendev(struct XenLegacyDevice *xendev);
  75struct XenLegacyDevice *xen_pv_find_xendev(const char *type, int dom, int dev);
  76
  77void xen_pv_unbind_evtchn(struct XenLegacyDevice *xendev);
  78int xen_pv_send_notify(struct XenLegacyDevice *xendev);
  79
  80void xen_pv_printf(struct XenLegacyDevice *xendev, int msg_level,
  81                   const char *fmt, ...)  G_GNUC_PRINTF(3, 4);
  82
  83#endif /* QEMU_HW_XEN_PVDEV_H */
  84