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