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1/*
2 * async.h: Asynchronous function calls for boot performance
3 *
4 * (C) Copyright 2009 Intel Corporation
5 * Author: Arjan van de Ven <arjan@linux.intel.com>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; version 2
10 * of the License.
11 */
12#ifndef __ASYNC_H__
13#define __ASYNC_H__
14
15#include <linux/types.h>
16#include <linux/list.h>
17
18typedef u64 async_cookie_t;
19typedef void (async_func_ptr) (void *data, async_cookie_t cookie);
20struct async_domain {
21 struct list_head node;
22 struct list_head pending;
23 unsigned registered:1;
24};
25
26/*
27 * domain participates in global async_synchronize_full
28 */
29#define ASYNC_DOMAIN(_name) \
30 struct async_domain _name = { .node = LIST_HEAD_INIT(_name.node), \
31 .pending = LIST_HEAD_INIT(_name.pending), \
32 .registered = 1 }
33
34/*
35 * domain is free to go out of scope as soon as all pending work is
36 * complete, this domain does not participate in async_synchronize_full
37 */
38#define ASYNC_DOMAIN_EXCLUSIVE(_name) \
39 struct async_domain _name = { .node = LIST_HEAD_INIT(_name.node), \
40 .pending = LIST_HEAD_INIT(_name.pending), \
41 .registered = 0 }
42
43extern async_cookie_t async_schedule(async_func_ptr *ptr, void *data);
44extern async_cookie_t async_schedule_domain(async_func_ptr *ptr, void *data,
45 struct async_domain *domain);
46void async_unregister_domain(struct async_domain *domain);
47extern void async_synchronize_full(void);
48extern void async_synchronize_full_domain(struct async_domain *domain);
49extern void async_synchronize_cookie(async_cookie_t cookie);
50extern void async_synchronize_cookie_domain(async_cookie_t cookie,
51 struct async_domain *domain);
52extern bool current_is_async(void);
53#endif