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#ifndef QEMU_HW_XEN_BACKEND_H
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#define QEMU_HW_XEN_BACKEND_H 1
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#include "xen_common.h"
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#include "sysemu.h"
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#include "net.h"
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#include "block_int.h"
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/* ------------------------------------------------------------- */
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#define XEN_BUFSIZE 1024
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struct XenDevice;
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/* driver uses grant tables  ->  open gntdev device (xendev->gnttabdev) */
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#define DEVOPS_FLAG_NEED_GNTDEV   1
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/* don't expect frontend doing correct state transitions (aka console quirk) */
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#define DEVOPS_FLAG_IGNORE_STATE  2
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struct XenDevOps {
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    size_t    size;
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    uint32_t  flags;
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    void      (*alloc)(struct XenDevice *xendev);
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    int       (*init)(struct XenDevice *xendev);
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    int       (*connect)(struct XenDevice *xendev);
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    void      (*event)(struct XenDevice *xendev);
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    void      (*disconnect)(struct XenDevice *xendev);
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    int       (*free)(struct XenDevice *xendev);
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    void      (*backend_changed)(struct XenDevice *xendev, const char *node);
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    void      (*frontend_changed)(struct XenDevice *xendev, const char *node);
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};
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struct XenDevice {
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    const char         *type;
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    int                dom;
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    int                dev;
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    char               name[64];
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    int                debug;
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    enum xenbus_state  be_state;
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    enum xenbus_state  fe_state;
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    int                online;
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    char               be[XEN_BUFSIZE];
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    char               *fe;
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    char               *protocol;
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    int                remote_port;
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    int                local_port;
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    int                evtchndev;
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    int                gnttabdev;
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    struct XenDevOps   *ops;
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    QTAILQ_ENTRY(XenDevice) next;
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};
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/* ------------------------------------------------------------- */
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/* variables */
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extern int xen_xc;
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extern struct xs_handle *xenstore;
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extern const char *xen_protocol;
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/* xenstore helper functions */
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int xenstore_write_str(const char *base, const char *node, const char *val);
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int xenstore_write_int(const char *base, const char *node, int ival);
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char *xenstore_read_str(const char *base, const char *node);
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int xenstore_read_int(const char *base, const char *node, int *ival);
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int xenstore_write_be_str(struct XenDevice *xendev, const char *node, const char *val);
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int xenstore_write_be_int(struct XenDevice *xendev, const char *node, int ival);
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char *xenstore_read_be_str(struct XenDevice *xendev, const char *node);
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int xenstore_read_be_int(struct XenDevice *xendev, const char *node, int *ival);
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char *xenstore_read_fe_str(struct XenDevice *xendev, const char *node);
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int xenstore_read_fe_int(struct XenDevice *xendev, const char *node, int *ival);
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const char *xenbus_strstate(enum xenbus_state state);
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struct XenDevice *xen_be_find_xendev(const char *type, int dom, int dev);
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void xen_be_check_state(struct XenDevice *xendev);
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/* xen backend driver bits */
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int xen_be_init(void);
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int xen_be_register(const char *type, struct XenDevOps *ops);
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int xen_be_set_state(struct XenDevice *xendev, enum xenbus_state state);
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int xen_be_bind_evtchn(struct XenDevice *xendev);
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void xen_be_unbind_evtchn(struct XenDevice *xendev);
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int xen_be_send_notify(struct XenDevice *xendev);
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void xen_be_printf(struct XenDevice *xendev, int msg_level, const char *fmt, ...)
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    __attribute__ ((format(printf, 3, 4)));
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/* actual backend drivers */
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extern struct XenDevOps xen_console_ops;      /* xen_console.c     */
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extern struct XenDevOps xen_kbdmouse_ops;     /* xen_framebuffer.c */
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extern struct XenDevOps xen_framebuffer_ops;  /* xen_framebuffer.c */
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extern struct XenDevOps xen_blkdev_ops;       /* xen_disk.c        */
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extern struct XenDevOps xen_netdev_ops;       /* xen_nic.c         */
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void xen_init_display(int domid);
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/* configuration (aka xenbus setup) */
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void xen_config_cleanup(void);
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int xen_config_dev_blk(DriveInfo *disk);
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int xen_config_dev_nic(NICInfo *nic);
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int xen_config_dev_vfb(int vdev, const char *type);
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int xen_config_dev_vkbd(int vdev);
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int xen_config_dev_console(int vdev);
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#endif /* QEMU_HW_XEN_BACKEND_H */