include/hw/xen/xen_backend.h

   1 #ifndef QEMU_HW_XEN_BACKEND_H
   2 #define QEMU_HW_XEN_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(XenDevice, (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 XenDevice *xendev, const char *node, const char *val);
  24 int xenstore_write_be_int(struct XenDevice *xendev, const char *node, int ival);
  25 int xenstore_write_be_int64(struct XenDevice *xendev, const char *node, int64_t ival);
  26 char *xenstore_read_be_str(struct XenDevice *xendev, const char *node);
  27 int xenstore_read_be_int(struct XenDevice *xendev, const char *node, int *ival);
  28 void xenstore_update_fe(char *watch, struct XenDevice *xendev);
  29 void xenstore_update_be(char *watch, char *type, int dom,
  30                         struct XenDevOps *ops);
  31 char *xenstore_read_fe_str(struct XenDevice *xendev, const char *node);
  32 int xenstore_read_fe_int(struct XenDevice *xendev, const char *node, int *ival);
  33 int xenstore_read_fe_uint64(struct XenDevice *xendev, const char *node,
  34                             uint64_t *uval);
  35
  36 void xen_be_check_state(struct XenDevice *xendev);
  37
  38 /* xen backend driver bits */
  39 int xen_be_init(void);
  40 void xen_be_register_common(void);
  41 int xen_be_register(const char *type, struct XenDevOps *ops);
  42 int xen_be_set_state(struct XenDevice *xendev, enum xenbus_state state);
  43 int xen_be_bind_evtchn(struct XenDevice *xendev);
  44 void xen_be_set_max_grant_refs(struct XenDevice *xendev,
  45                                unsigned int nr_refs);
  46 void *xen_be_map_grant_refs(struct XenDevice *xendev, uint32_t *refs,
  47                             unsigned int nr_refs, int prot);
  48 void xen_be_unmap_grant_refs(struct XenDevice *xendev, void *ptr,
  49                              unsigned int nr_refs);
  50
  51 typedef struct XenGrantCopySegment {
  52     union {
  53         void *virt;
  54         struct {
  55             uint32_t ref;
  56             off_t offset;
  57         } foreign;
  58     } source, dest;
  59     size_t len;
  60 } XenGrantCopySegment;
  61
  62 int xen_be_copy_grant_refs(struct XenDevice *xendev,
  63                            bool to_domain, XenGrantCopySegment segs[],
  64                            unsigned int nr_segs);
  65
  66 static inline void *xen_be_map_grant_ref(struct XenDevice *xendev,
  67                                          uint32_t ref, int prot)
  68 {
  69     return xen_be_map_grant_refs(xendev, &ref, 1, prot);
  70 }
  71
  72 static inline void xen_be_unmap_grant_ref(struct XenDevice *xendev,
  73                                           void *ptr)
  74 {
  75     return xen_be_unmap_grant_refs(xendev, ptr, 1);
  76 }
  77
  78 /* actual backend drivers */
  79 extern struct XenDevOps xen_console_ops;      /* xen_console.c     */
  80 extern struct XenDevOps xen_kbdmouse_ops;     /* xen_framebuffer.c */
  81 extern struct XenDevOps xen_framebuffer_ops;  /* xen_framebuffer.c */
  82 extern struct XenDevOps xen_blkdev_ops;       /* xen_disk.c        */
  83 #ifdef CONFIG_VIRTFS
  84 extern struct XenDevOps xen_9pfs_ops;       /* xen-9p-backend.c        */
  85 #endif
  86 extern struct XenDevOps xen_netdev_ops;       /* xen_nic.c         */
  87 #ifdef CONFIG_USB_LIBUSB
  88 extern struct XenDevOps xen_usb_ops;          /* xen-usb.c         */
  89 #endif
  90
  91 /* configuration (aka xenbus setup) */
  92 void xen_config_cleanup(void);
  93 int xen_config_dev_blk(DriveInfo *disk);
  94 int xen_config_dev_nic(NICInfo *nic);
  95 int xen_config_dev_vfb(int vdev, const char *type);
  96 int xen_config_dev_vkbd(int vdev);
  97 int xen_config_dev_console(int vdev);
  98
  99 #endif /* QEMU_HW_XEN_BACKEND_H */