include/hw/xen/xen_pvdev.h

   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
  11 struct 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
  18 struct 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
  35 struct 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 */
  63 int xenstore_write_str(const char *base, const char *node, const char *val);
  64 int xenstore_write_int(const char *base, const char *node, int ival);
  65 int xenstore_write_int64(const char *base, const char *node, int64_t ival);
  66 char *xenstore_read_str(const char *base, const char *node);
  67 int xenstore_read_int(const char *base, const char *node, int *ival);
  68 int xenstore_read_uint64(const char *base, const char *node, uint64_t *uval);
  69
  70 const char *xenbus_strstate(enum xenbus_state state);
  71
  72 void xen_pv_evtchn_event(void *opaque);
  73 void xen_pv_insert_xendev(struct XenLegacyDevice *xendev);
  74 void xen_pv_del_xendev(struct XenLegacyDevice *xendev);
  75 struct XenLegacyDevice *xen_pv_find_xendev(const char *type, int dom, int dev);
  76
  77 void xen_pv_unbind_evtchn(struct XenLegacyDevice *xendev);
  78 int xen_pv_send_notify(struct XenLegacyDevice *xendev);
  79
  80 void 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 */