kernel - Include headers declaring vm_page_t in lwbuf headers
[dragonfly.git] / sys / cpu / i386 / include / lwbuf.h
CommitLineData
5c5185ae
SG
1/*
2 * Copyright (c) 2010 by The DragonFly Project and Samuel J. Greear.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to The DragonFly Project
6 * by Samuel J. Greear <sjg@thesjg.com>
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 * 3. Neither the name of The DragonFly Project nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific, prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#ifndef _CPU_LWBUF_H_
37#define _CPU_LWBUF_H_
38
39#ifndef _SYS_TYPES_H_
40#include <sys/types.h>
41#endif
42#ifndef _SYS_QUEUE_H_
43#include <sys/queue.h>
44#endif
45#ifndef _SYS_GLOBALDATA_H_
46#include <sys/globaldata.h>
47#endif
48#ifndef _VM_PMAP_H_
49#include <vm/pmap.h>
50#endif
46751036
SG
51#ifndef _VM_VM_PAGE_H_
52#include <vm/vm_page.h>
53#endif
5c5185ae
SG
54#ifndef _MACHINE_ATOMIC_H_
55#include <machine/atomic.h>
56#endif
57
58#if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES)
59#error "This file should not be included by userland programs."
60#endif
61
62struct lwbuf {
63 vm_page_t m; /* currently mapped page */
64 vm_offset_t kva; /* va of mapping */
65 cpumask_t cpumask; /* cpu mapping synchronization */
66};
67
68struct lwbuf_free_kvp {
69 vm_offset_t kva;
70 SLIST_ENTRY(lwbuf_free_kvp) next;
71};
72SLIST_HEAD(lwbuf_free_kvp_list, lwbuf_free_kvp);
73
74static __inline vm_page_t
75lwbuf_page(struct lwbuf *lwb) {
76 return (lwb->m);
77}
78
79#if defined(_KERNEL)
80
81struct lwbuf *lwbuf_alloc(vm_page_t);
82void lwbuf_free(struct lwbuf *);
83vm_offset_t lwbuf_kva(struct lwbuf *lwb);
84void lwbuf_set_global(struct lwbuf *);
85
86#endif
87
88#endif /* !_CPU_LWBUF_H_ */