include/hw/xen/xen_pvdev.h

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