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     const char         *type;
  33     int                dom;
  34     int                dev;
  35     char               name[64];
  36     int                debug;
  37
  38     enum xenbus_state  be_state;
  39     enum xenbus_state  fe_state;
  40     int                online;
  41     char               be[XEN_BUFSIZE];
  42     char               *fe;
  43     char               *protocol;
  44     int                remote_port;
  45     int                local_port;
  46
  47     xenevtchn_handle   *evtchndev;
  48     xengnttab_handle   *gnttabdev;
  49
  50     struct XenDevOps   *ops;
  51     QTAILQ_ENTRY(XenDevice) next;
  52 };
  53
  54 /* ------------------------------------------------------------- */
  55
  56 /* xenstore helper functions */
  57 int xenstore_write_str(const char *base, const char *node, const char *val);
  58 int xenstore_write_int(const char *base, const char *node, int ival);
  59 int xenstore_write_int64(const char *base, const char *node, int64_t ival);
  60 char *xenstore_read_str(const char *base, const char *node);
  61 int xenstore_read_int(const char *base, const char *node, int *ival);
  62 int xenstore_read_uint64(const char *base, const char *node, uint64_t *uval);
  63 void xenstore_update(void *unused);
  64
  65 const char *xenbus_strstate(enum xenbus_state state);
  66
  67 void xen_be_evtchn_event(void *opaque);
  68 void xen_pv_insert_xendev(struct XenDevice *xendev);
  69 void xen_be_del_xendev(struct XenDevice *xendev);
  70 struct XenDevice *xen_be_find_xendev(const char *type, int dom, int dev);
  71
  72 void xen_be_unbind_evtchn(struct XenDevice *xendev);
  73 int xen_be_send_notify(struct XenDevice *xendev);
  74
  75 void xen_pv_printf(struct XenDevice *xendev, int msg_level,
  76                    const char *fmt, ...)  GCC_FMT_ATTR(3, 4);
  77
  78 #endif /* QEMU_HW_XEN_PVDEV_H */