Archipelago » qemu

#ifndef QEMU_HW_XEN_BACKEND_H

#define QEMU_HW_XEN_BACKEND_H 1

#include "xen_common.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     */

#endif /* QEMU_HW_XEN_BACKEND_H */