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 XenDevice;
  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 XenDevice *xendev);
  20     int       (*init)(struct XenDevice *xendev);
  21     int       (*initialise)(struct XenDevice *xendev);
  22     void      (*connected)(struct XenDevice *xendev);
  23     void      (*event)(struct XenDevice *xendev);
  24     void      (*disconnect)(struct XenDevice *xendev);
  25     int       (*free)(struct XenDevice *xendev);
  26     void      (*backend_changed)(struct XenDevice *xendev, const char *node);
  27     void      (*frontend_changed)(struct XenDevice *xendev, const char *node);
  28     int       (*backend_register)(void);
  29 };
  30
  31 struct XenDevice {
  32     DeviceState        qdev;
  33     const char         *type;
  34     int                dom;
  35     int                dev;
  36     char               name[64];
  37     int                debug;
  38
  39     enum xenbus_state  be_state;
  40     enum xenbus_state  fe_state;
  41     int                online;
  42     char               be[XEN_BUFSIZE];
  43     char               *fe;
  44     char               *protocol;
  45     int                remote_port;
  46     int                local_port;
  47
  48     xenevtchn_handle   *evtchndev;
  49     xengnttab_handle   *gnttabdev;
  50
  51     struct XenDevOps   *ops;
  52     QTAILQ_ENTRY(XenDevice) next;
  53 };
  54
  55 /* ------------------------------------------------------------- */
  56
  57 /* xenstore helper functions */
  58 int xenstore_write_str(const char *base, const char *node, const char *val);
  59 int xenstore_write_int(const char *base, const char *node, int ival);
  60 int xenstore_write_int64(const char *base, const char *node, int64_t ival);
  61 char *xenstore_read_str(const char *base, const char *node);
  62 int xenstore_read_int(const char *base, const char *node, int *ival);
  63 int xenstore_read_uint64(const char *base, const char *node, uint64_t *uval);
  64 void xenstore_update(void *unused);
  65
  66 const char *xenbus_strstate(enum xenbus_state state);
  67
  68 void xen_pv_evtchn_event(void *opaque);
  69 void xen_pv_insert_xendev(struct XenDevice *xendev);
  70 void xen_pv_del_xendev(struct XenDevice *xendev);
  71 struct XenDevice *xen_pv_find_xendev(const char *type, int dom, int dev);
  72
  73 void xen_pv_unbind_evtchn(struct XenDevice *xendev);
  74 int xen_pv_send_notify(struct XenDevice *xendev);
  75
  76 void xen_pv_printf(struct XenDevice *xendev, int msg_level,
  77                    const char *fmt, ...)  GCC_FMT_ATTR(3, 4);
  78
  79 #endif /* QEMU_HW_XEN_PVDEV_H */