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/*
* Copyright (c) 2018 Citrix Systems Inc.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef HW_XEN_BUS_H
#define HW_XEN_BUS_H
#include "hw/xen/xen_backend_ops.h"
#include "hw/sysbus.h"
#include "qemu/notify.h"
#include "qom/object.h"
typedef struct XenEventChannel XenEventChannel;
struct XenDevice {
DeviceState qdev;
domid_t frontend_id;
char *name;
struct qemu_xs_handle *xsh;
char *backend_path, *frontend_path;
enum xenbus_state backend_state, frontend_state;
Notifier exit;
struct qemu_xs_watch *backend_state_watch, *frontend_state_watch;
bool backend_online;
struct qemu_xs_watch *backend_online_watch;
xengnttab_handle *xgth;
bool inactive;
QLIST_HEAD(, XenEventChannel) event_channels;
QLIST_ENTRY(XenDevice) list;
};
typedef struct XenDevice XenDevice;
typedef char *(*XenDeviceGetFrontendPath)(XenDevice *xendev, Error **errp);
typedef char *(*XenDeviceGetName)(XenDevice *xendev, Error **errp);
typedef void (*XenDeviceRealize)(XenDevice *xendev, Error **errp);
typedef void (*XenDeviceFrontendChanged)(XenDevice *xendev,
enum xenbus_state frontend_state,
Error **errp);
typedef void (*XenDeviceUnrealize)(XenDevice *xendev);
struct XenDeviceClass {
/*< private >*/
DeviceClass parent_class;
/*< public >*/
const char *backend;
const char *device;
XenDeviceGetFrontendPath get_frontend_path;
XenDeviceGetName get_name;
XenDeviceRealize realize;
XenDeviceFrontendChanged frontend_changed;
XenDeviceUnrealize unrealize;
};
#define TYPE_XEN_DEVICE "xen-device"
OBJECT_DECLARE_TYPE(XenDevice, XenDeviceClass, XEN_DEVICE)
struct XenBus {
BusState qbus;
domid_t backend_id;
struct qemu_xs_handle *xsh;
unsigned int backend_types;
struct qemu_xs_watch **backend_watch;
QLIST_HEAD(, XenDevice) inactive_devices;
};
struct XenBusClass {
/*< private >*/
BusClass parent_class;
};
#define TYPE_XEN_BUS "xen-bus"
OBJECT_DECLARE_TYPE(XenBus, XenBusClass,
XEN_BUS)
BusState *xen_bus_init(void);
void xen_device_backend_set_state(XenDevice *xendev,
enum xenbus_state state);
enum xenbus_state xen_device_backend_get_state(XenDevice *xendev);
void xen_device_backend_printf(XenDevice *xendev, const char *key,
const char *fmt, ...)
G_GNUC_PRINTF(3, 4);
void xen_device_frontend_printf(XenDevice *xendev, const char *key,
const char *fmt, ...)
G_GNUC_PRINTF(3, 4);
int xen_device_frontend_scanf(XenDevice *xendev, const char *key,
const char *fmt, ...)
G_GNUC_SCANF(3, 4);
void xen_device_set_max_grant_refs(XenDevice *xendev, unsigned int nr_refs,
Error **errp);
void *xen_device_map_grant_refs(XenDevice *xendev, uint32_t *refs,
unsigned int nr_refs, int prot,
Error **errp);
void xen_device_unmap_grant_refs(XenDevice *xendev, void *map, uint32_t *refs,
unsigned int nr_refs, Error **errp);
typedef struct XenDeviceGrantCopySegment {
union {
void *virt;
struct {
uint32_t ref;
off_t offset;
} foreign;
} source, dest;
size_t len;
} XenDeviceGrantCopySegment;
void xen_device_copy_grant_refs(XenDevice *xendev, bool to_domain,
XenDeviceGrantCopySegment segs[],
unsigned int nr_segs, Error **errp);
typedef bool (*XenEventHandler)(void *opaque);
XenEventChannel *xen_device_bind_event_channel(XenDevice *xendev,
unsigned int port,
XenEventHandler handler,
void *opaque, Error **errp);
void xen_device_set_event_channel_context(XenDevice *xendev,
XenEventChannel *channel,
AioContext *ctx,
Error **errp);
void xen_device_notify_event_channel(XenDevice *xendev,
XenEventChannel *channel,
Error **errp);
void xen_device_unbind_event_channel(XenDevice *xendev,
XenEventChannel *channel,
Error **errp);
unsigned int xen_event_channel_get_local_port(XenEventChannel *channel);
#endif /* HW_XEN_BUS_H */
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