LXR qemu/include/hw/xen/xen-legacy-backend.h

   1#ifndef HW_XEN_LEGACY_BACKEND_H
   2#define HW_XEN_LEGACY_BACKEND_H
   3
   4#include "hw/xen/xen_common.h"
   5#include "hw/xen/xen_pvdev.h"
   6#include "sysemu/sysemu.h"
   7#include "net/net.h"
   8
   9#define TYPE_XENSYSDEV "xen-sysdev"
  10#define TYPE_XENSYSBUS "xen-sysbus"
  11#define TYPE_XENBACKEND "xen-backend"
  12
  13#define XENBACKEND_DEVICE(obj) \
  14    OBJECT_CHECK(XenLegacyDevice, (obj), TYPE_XENBACKEND)
  15
  16/* variables */
  17extern struct xs_handle *xenstore;
  18extern const char *xen_protocol;
  19extern DeviceState *xen_sysdev;
  20extern BusState *xen_sysbus;
  21
  22int xenstore_mkdir(char *path, int p);
  23int xenstore_write_be_str(struct XenLegacyDevice *xendev, const char *node,
  24                          const char *val);
  25int xenstore_write_be_int(struct XenLegacyDevice *xendev, const char *node,
  26                          int ival);
  27int xenstore_write_be_int64(struct XenLegacyDevice *xendev, const char *node,
  28                            int64_t ival);
  29char *xenstore_read_be_str(struct XenLegacyDevice *xendev, const char *node);
  30int xenstore_read_be_int(struct XenLegacyDevice *xendev, const char *node,
  31                         int *ival);
  32void xenstore_update_fe(char *watch, struct XenLegacyDevice *xendev);
  33void xenstore_update_be(char *watch, char *type, int dom,
  34                        struct XenDevOps *ops);
  35char *xenstore_read_fe_str(struct XenLegacyDevice *xendev, const char *node);
  36int xenstore_read_fe_int(struct XenLegacyDevice *xendev, const char *node,
  37                         int *ival);
  38int xenstore_read_fe_uint64(struct XenLegacyDevice *xendev, const char *node,
  39                            uint64_t *uval);
  40
  41void xen_be_check_state(struct XenLegacyDevice *xendev);
  42
  43/* xen backend driver bits */
  44int xen_be_init(void);
  45void xen_be_register_common(void);
  46int xen_be_register(const char *type, struct XenDevOps *ops);
  47int xen_be_set_state(struct XenLegacyDevice *xendev, enum xenbus_state state);
  48int xen_be_bind_evtchn(struct XenLegacyDevice *xendev);
  49void xen_be_set_max_grant_refs(struct XenLegacyDevice *xendev,
  50                               unsigned int nr_refs);
  51void *xen_be_map_grant_refs(struct XenLegacyDevice *xendev, uint32_t *refs,
  52                            unsigned int nr_refs, int prot);
  53void xen_be_unmap_grant_refs(struct XenLegacyDevice *xendev, void *ptr,
  54                             unsigned int nr_refs);
  55
  56typedef struct XenGrantCopySegment {
  57    union {
  58        void *virt;
  59        struct {
  60            uint32_t ref;
  61            off_t offset;
  62        } foreign;
  63    } source, dest;
  64    size_t len;
  65} XenGrantCopySegment;
  66
  67int xen_be_copy_grant_refs(struct XenLegacyDevice *xendev,
  68                           bool to_domain, XenGrantCopySegment segs[],
  69                           unsigned int nr_segs);
  70
  71static inline void *xen_be_map_grant_ref(struct XenLegacyDevice *xendev,
  72                                         uint32_t ref, int prot)
  73{
  74    return xen_be_map_grant_refs(xendev, &ref, 1, prot);
  75}
  76
  77static inline void xen_be_unmap_grant_ref(struct XenLegacyDevice *xendev,
  78                                          void *ptr)
  79{
  80    return xen_be_unmap_grant_refs(xendev, ptr, 1);
  81}
  82
  83/* actual backend drivers */
  84extern struct XenDevOps xen_console_ops;      /* xen_console.c     */
  85extern struct XenDevOps xen_kbdmouse_ops;     /* xen_framebuffer.c */
  86extern struct XenDevOps xen_framebuffer_ops;  /* xen_framebuffer.c */
  87extern struct XenDevOps xen_blkdev_ops;       /* xen_disk.c        */
  88#ifdef CONFIG_VIRTFS
  89extern struct XenDevOps xen_9pfs_ops;       /* xen-9p-backend.c        */
  90#endif
  91extern struct XenDevOps xen_netdev_ops;       /* xen_nic.c         */
  92#ifdef CONFIG_USB_LIBUSB
  93extern struct XenDevOps xen_usb_ops;          /* xen-usb.c         */
  94#endif
  95
  96/* configuration (aka xenbus setup) */
  97void xen_config_cleanup(void);
  98int xen_config_dev_blk(DriveInfo *disk);
  99int xen_config_dev_nic(NICInfo *nic);
 100int xen_config_dev_vfb(int vdev, const char *type);
 101int xen_config_dev_vkbd(int vdev);
 102int xen_config_dev_console(int vdev);
 103
 104#endif /* HW_XEN_LEGACY_BACKEND_H */
 105