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