[qemu.git] / hw / xen_backend.h

#ifndef QEMU_HW_XEN_BACKEND_H
#define QEMU_HW_XEN_BACKEND_H 1

#include "xen_common.h"
#include "sysemu.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;

/* 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        */

void xen_init_display(int domid);

#endif /* QEMU_HW_XEN_BACKEND_H */
Commit	Line	Data
d94f9486 AL	1	#ifndef QEMU_HW_XEN_BACKEND_H
	2	#define QEMU_HW_XEN_BACKEND_H 1
	3
	4	#include "xen_common.h"
62d23efa	5	#include "sysemu.h"
d94f9486 AL	6
	7	/* ------------------------------------------------------------- */
	8
	9	#define XEN_BUFSIZE 1024
	10
	11	struct XenDevice;
	12
	13	/* driver uses grant tables -> open gntdev device (xendev->gnttabdev) */
	14	#define DEVOPS_FLAG_NEED_GNTDEV 1
	15	/* don't expect frontend doing correct state transitions (aka console quirk) */
	16	#define DEVOPS_FLAG_IGNORE_STATE 2
	17
	18	struct XenDevOps {
	19	size_t size;
	20	uint32_t flags;
	21	void (alloc)(struct XenDevice xendev);
	22	int (init)(struct XenDevice xendev);
	23	int (connect)(struct XenDevice xendev);
	24	void (event)(struct XenDevice xendev);
	25	void (disconnect)(struct XenDevice xendev);
	26	int (free)(struct XenDevice xendev);
	27	void (backend_changed)(struct XenDevice xendev, const char *node);
	28	void (frontend_changed)(struct XenDevice xendev, const char *node);
	29	};
	30
	31	struct XenDevice {
	32	const char *type;
	33	int dom;
	34	int dev;
	35	char name[64];
	36	int debug;
	37
	38	enum xenbus_state be_state;
	39	enum xenbus_state fe_state;
	40	int online;
	41	char be[XEN_BUFSIZE];
	42	char *fe;
	43	char *protocol;
	44	int remote_port;
	45	int local_port;
	46
	47	int evtchndev;
	48	int gnttabdev;
	49
	50	struct XenDevOps *ops;
	51	TAILQ_ENTRY(XenDevice) next;
	52	};
	53
	54	/* ------------------------------------------------------------- */
	55
	56	/* variables */
	57	extern int xen_xc;
	58	extern struct xs_handle *xenstore;
	59
	60	/* xenstore helper functions */
	61	int xenstore_write_str(const char base, const char node, const char *val);
	62	int xenstore_write_int(const char base, const char node, int ival);
	63	char xenstore_read_str(const char base, const char *node);
	64	int xenstore_read_int(const char base, const char node, int *ival);
	65
	66	int xenstore_write_be_str(struct XenDevice xendev, const char node, const char *val);
	67	int xenstore_write_be_int(struct XenDevice xendev, const char node, int ival);
	68	char xenstore_read_be_str(struct XenDevice xendev, const char *node);
	69	int xenstore_read_be_int(struct XenDevice xendev, const char node, int *ival);
70	char xenstore_read_fe_str(struct XenDevice xendev, const char *node);
71	int xenstore_read_fe_int(struct XenDevice xendev, const char node, int *ival);
72
73	const char *xenbus_strstate(enum xenbus_state state);
74	struct XenDevice xen_be_find_xendev(const char type, int dom, int dev);
75	void xen_be_check_state(struct XenDevice *xendev);
76
77	/* xen backend driver bits */
78	int xen_be_init(void);
79	int xen_be_register(const char type, struct XenDevOps ops);
80	int xen_be_set_state(struct XenDevice *xendev, enum xenbus_state state);
81	int xen_be_bind_evtchn(struct XenDevice *xendev);
82	void xen_be_unbind_evtchn(struct XenDevice *xendev);
83	int xen_be_send_notify(struct XenDevice *xendev);
84	void xen_be_printf(struct XenDevice xendev, int msg_level, const char fmt, ...)
85	__attribute__ ((format(printf, 3, 4)));
86
e57dd20b AL	87	/* actual backend drivers */
e57dd20b AL	88	extern struct XenDevOps xen_console_ops; /* xen_console.c */
e7151f83 AL	89	extern struct XenDevOps xen_kbdmouse_ops; /* xen_framebuffer.c */
e7151f83 AL	90	extern struct XenDevOps xen_framebuffer_ops; /* xen_framebuffer.c */
62d23efa	91	extern struct XenDevOps xen_blkdev_ops; /* xen_disk.c */
e7151f83 AL	92
e7151f83 AL	93	void xen_init_display(int domid);
e57dd20b	94
d94f9486	95	#endif /* QEMU_HW_XEN_BACKEND_H */