linux-user: stack_base is now mandatory on all targets
[qemu.git] / hw / xen_backend.h
1 #ifndef QEMU_HW_XEN_BACKEND_H
2 #define QEMU_HW_XEN_BACKEND_H 1
3
4 #include "xen_common.h"
5 #include "sysemu.h"
6 #include "net.h"
7
8 /* ------------------------------------------------------------- */
9
10 #define XEN_BUFSIZE 1024
11
12 struct XenDevice;
13
14 /* driver uses grant tables -> open gntdev device (xendev->gnttabdev) */
15 #define DEVOPS_FLAG_NEED_GNTDEV 1
16 /* don't expect frontend doing correct state transitions (aka console quirk) */
17 #define DEVOPS_FLAG_IGNORE_STATE 2
18
19 struct XenDevOps {
20 size_t size;
21 uint32_t flags;
22 void (*alloc)(struct XenDevice *xendev);
23 int (*init)(struct XenDevice *xendev);
24 int (*initialise)(struct XenDevice *xendev);
25 void (*connected)(struct XenDevice *xendev);
26 void (*event)(struct XenDevice *xendev);
27 void (*disconnect)(struct XenDevice *xendev);
28 int (*free)(struct XenDevice *xendev);
29 void (*backend_changed)(struct XenDevice *xendev, const char *node);
30 void (*frontend_changed)(struct XenDevice *xendev, const char *node);
31 };
32
33 struct XenDevice {
34 const char *type;
35 int dom;
36 int dev;
37 char name[64];
38 int debug;
39
40 enum xenbus_state be_state;
41 enum xenbus_state fe_state;
42 int online;
43 char be[XEN_BUFSIZE];
44 char *fe;
45 char *protocol;
46 int remote_port;
47 int local_port;
48
49 XenEvtchn evtchndev;
50 XenGnttab gnttabdev;
51
52 struct XenDevOps *ops;
53 QTAILQ_ENTRY(XenDevice) next;
54 };
55
56 /* ------------------------------------------------------------- */
57
58 /* variables */
59 extern XenXC xen_xc;
60 extern struct xs_handle *xenstore;
61 extern const char *xen_protocol;
62
63 /* xenstore helper functions */
64 int xenstore_write_str(const char *base, const char *node, const char *val);
65 int xenstore_write_int(const char *base, const char *node, int ival);
66 char *xenstore_read_str(const char *base, const char *node);
67 int xenstore_read_int(const char *base, const char *node, int *ival);
68
69 int xenstore_write_be_str(struct XenDevice *xendev, const char *node, const char *val);
70 int xenstore_write_be_int(struct XenDevice *xendev, const char *node, int ival);
71 char *xenstore_read_be_str(struct XenDevice *xendev, const char *node);
72 int xenstore_read_be_int(struct XenDevice *xendev, const char *node, int *ival);
73 char *xenstore_read_fe_str(struct XenDevice *xendev, const char *node);
74 int xenstore_read_fe_int(struct XenDevice *xendev, const char *node, int *ival);
75
76 const char *xenbus_strstate(enum xenbus_state state);
77 struct XenDevice *xen_be_find_xendev(const char *type, int dom, int dev);
78 void xen_be_check_state(struct XenDevice *xendev);
79
80 /* xen backend driver bits */
81 int xen_be_init(void);
82 int xen_be_register(const char *type, struct XenDevOps *ops);
83 int xen_be_set_state(struct XenDevice *xendev, enum xenbus_state state);
84 int xen_be_bind_evtchn(struct XenDevice *xendev);
85 void xen_be_unbind_evtchn(struct XenDevice *xendev);
86 int xen_be_send_notify(struct XenDevice *xendev);
87 void xen_be_printf(struct XenDevice *xendev, int msg_level, const char *fmt, ...)
88 GCC_FMT_ATTR(3, 4);
89
90 /* actual backend drivers */
91 extern struct XenDevOps xen_console_ops; /* xen_console.c */
92 extern struct XenDevOps xen_kbdmouse_ops; /* xen_framebuffer.c */
93 extern struct XenDevOps xen_framebuffer_ops; /* xen_framebuffer.c */
94 extern struct XenDevOps xen_blkdev_ops; /* xen_disk.c */
95 extern struct XenDevOps xen_netdev_ops; /* xen_nic.c */
96
97 void xen_init_display(int domid);
98
99 /* configuration (aka xenbus setup) */
100 void xen_config_cleanup(void);
101 int xen_config_dev_blk(DriveInfo *disk);
102 int xen_config_dev_nic(NICInfo *nic);
103 int xen_config_dev_vfb(int vdev, const char *type);
104 int xen_config_dev_vkbd(int vdev);
105 int xen_config_dev_console(int vdev);
106
107 #endif /* QEMU_HW_XEN_BACKEND_H */