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