1 #ifndef HW_XEN_LEGACY_BACKEND_H
2 #define HW_XEN_LEGACY_BACKEND_H
3 
4 #include "hw/xen/xen_backend_ops.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 qemu_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 char *xenstore_read_fe_str(struct XenLegacyDevice *xendev, const char *node);
34 int xenstore_read_fe_int(struct XenLegacyDevice *xendev, const char *node,
35                          int *ival);
36 int xenstore_read_fe_uint64(struct XenLegacyDevice *xendev, const char *node,
37                             uint64_t *uval);
38 
39 void xen_be_check_state(struct XenLegacyDevice *xendev);
40 
41 /* xen backend driver bits */
42 void xen_be_init(void);
43 int xen_be_register(const char *type, struct XenDevOps *ops);
44 int xen_be_set_state(struct XenLegacyDevice *xendev, enum xenbus_state state);
45 int xen_be_bind_evtchn(struct XenLegacyDevice *xendev);
46 void xen_be_set_max_grant_refs(struct XenLegacyDevice *xendev,
47                                unsigned int nr_refs);
48 void *xen_be_map_grant_refs(struct XenLegacyDevice *xendev, uint32_t *refs,
49                             unsigned int nr_refs, int prot);
50 void xen_be_unmap_grant_refs(struct XenLegacyDevice *xendev, void *ptr,
51                              uint32_t *refs, unsigned int nr_refs);
52 
53 int xen_be_copy_grant_refs(struct XenLegacyDevice *xendev,
54                            bool to_domain, XenGrantCopySegment segs[],
55                            unsigned int nr_segs);
56 
57 static inline void *xen_be_map_grant_ref(struct XenLegacyDevice *xendev,
58                                          uint32_t ref, int prot)
59 {
60     return xen_be_map_grant_refs(xendev, &ref, 1, prot);
61 }
62 
63 static inline void xen_be_unmap_grant_ref(struct XenLegacyDevice *xendev,
64                                           void *ptr, uint32_t ref)
65 {
66     return xen_be_unmap_grant_refs(xendev, ptr, &ref, 1);
67 }
68 
69 /* actual backend drivers */
70 extern struct XenDevOps xen_console_ops;      /* xen_console.c     */
71 extern struct XenDevOps xen_kbdmouse_ops;     /* xen_framebuffer.c */
72 extern struct XenDevOps xen_framebuffer_ops;  /* xen_framebuffer.c */
73 extern struct XenDevOps xen_blkdev_ops;       /* xen_disk.c        */
74 #ifdef CONFIG_VIRTFS
75 extern struct XenDevOps xen_9pfs_ops;       /* xen-9p-backend.c        */
76 #endif
77 extern struct XenDevOps xen_netdev_ops;       /* xen_nic.c         */
78 #ifdef CONFIG_USB_LIBUSB
79 extern struct XenDevOps xen_usb_ops;          /* xen-usb.c         */
80 #endif
81 
82 /* configuration (aka xenbus setup) */
83 void xen_config_cleanup(void);
84 int xen_config_dev_blk(DriveInfo *disk);
85 int xen_config_dev_nic(NICInfo *nic);
86 int xen_config_dev_vfb(int vdev, const char *type);
87 int xen_config_dev_vkbd(int vdev);
88 int xen_config_dev_console(int vdev);
89 
90 #endif /* HW_XEN_LEGACY_BACKEND_H */
91