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