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 */
  17 extern struct xs_handle *xenstore;
  18 extern const char *xen_protocol;
  19 extern DeviceState *xen_sysdev;
  20 extern BusState *xen_sysbus;
  21
  22 int xenstore_mkdir(char *path, int p);
  23 int xenstore_write_be_str(struct XenLegacyDevice *xendev, const char *node,
  24                           const char *val);
  25 int xenstore_write_be_int(struct XenLegacyDevice *xendev, const char *node,
  26                           int ival);
  27 int xenstore_write_be_int64(struct XenLegacyDevice *xendev, const char *node,
  28                             int64_t ival);
  29 char *xenstore_read_be_str(struct XenLegacyDevice *xendev, const char *node);
  30 int xenstore_read_be_int(struct XenLegacyDevice *xendev, const char *node,
  31                          int *ival);
  32 void xenstore_update_fe(char *watch, struct XenLegacyDevice *xendev);
  33 void xenstore_update_be(char *watch, char *type, int dom,
  34                         struct XenDevOps *ops);
  35 char *xenstore_read_fe_str(struct XenLegacyDevice *xendev, const char *node);
  36 int xenstore_read_fe_int(struct XenLegacyDevice *xendev, const char *node,
  37                          int *ival);
  38 int xenstore_read_fe_uint64(struct XenLegacyDevice *xendev, const char *node,
  39                             uint64_t *uval);
  40
  41 void xen_be_check_state(struct XenLegacyDevice *xendev);
  42
  43 /* xen backend driver bits */
  44 int xen_be_init(void);
  45 void xen_be_register_common(void);
  46 int xen_be_register(const char *type, struct XenDevOps *ops);
  47 int xen_be_set_state(struct XenLegacyDevice *xendev, enum xenbus_state state);
  48 int xen_be_bind_evtchn(struct XenLegacyDevice *xendev);
  49 void xen_be_set_max_grant_refs(struct XenLegacyDevice *xendev,
  50                                unsigned int nr_refs);
  51 void *xen_be_map_grant_refs(struct XenLegacyDevice *xendev, uint32_t *refs,
  52                             unsigned int nr_refs, int prot);
  53 void xen_be_unmap_grant_refs(struct XenLegacyDevice *xendev, void *ptr,
  54                              unsigned int nr_refs);
  55
  56 typedef 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
  67 int xen_be_copy_grant_refs(struct XenLegacyDevice *xendev,
  68                            bool to_domain, XenGrantCopySegment segs[],
  69                            unsigned int nr_segs);
  70
  71 static 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
  77 static 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 */
  84 extern struct XenDevOps xen_console_ops;      /* xen_console.c     */
  85 extern struct XenDevOps xen_kbdmouse_ops;     /* xen_framebuffer.c */
  86 extern struct XenDevOps xen_framebuffer_ops;  /* xen_framebuffer.c */
  87 extern struct XenDevOps xen_blkdev_ops;       /* xen_disk.c        */
  88 #ifdef CONFIG_VIRTFS
  89 extern struct XenDevOps xen_9pfs_ops;       /* xen-9p-backend.c        */
  90 #endif
  91 extern struct XenDevOps xen_netdev_ops;       /* xen_nic.c         */
  92 #ifdef CONFIG_USB_LIBUSB
  93 extern struct XenDevOps xen_usb_ops;          /* xen-usb.c         */
  94 #endif
  95
  96 /* configuration (aka xenbus setup) */
  97 void xen_config_cleanup(void);
  98 int xen_config_dev_blk(DriveInfo *disk);
  99 int xen_config_dev_nic(NICInfo *nic);
 100 int xen_config_dev_vfb(int vdev, const char *type);
 101 int xen_config_dev_vkbd(int vdev);
 102 int xen_config_dev_console(int vdev);
 103
 104 #endif /* HW_XEN_LEGACY_BACKEND_H */