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Marek Szyprowski004cc372010-12-09 10:20:47 -03001/*
2 * videobuf2-memops.h - generic memory handling routines for videobuf2
3 *
4 * Copyright (C) 2010 Samsung Electronics
5 *
Pawel Osciak95072082011-03-13 15:23:32 -03006 * Author: Pawel Osciak <pawel@osciak.com>
Marek Szyprowski004cc372010-12-09 10:20:47 -03007 * Marek Szyprowski <m.szyprowski@samsung.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation.
12 */
13
14#ifndef _MEDIA_VIDEOBUF2_MEMOPS_H
15#define _MEDIA_VIDEOBUF2_MEMOPS_H
16
17#include <media/videobuf2-core.h>
18
19/**
20 * vb2_vmarea_handler - common vma refcount tracking handler
21 * @refcount: pointer to refcount entry in the buffer
22 * @put: callback to function that decreases buffer refcount
23 * @arg: argument for @put callback
24 */
25struct vb2_vmarea_handler {
26 atomic_t *refcount;
27 void (*put)(void *arg);
28 void *arg;
29};
30
31extern const struct vm_operations_struct vb2_common_vm_ops;
32
33int vb2_get_contig_userptr(unsigned long vaddr, unsigned long size,
34 struct vm_area_struct **res_vma, dma_addr_t *res_pa);
35
36int vb2_mmap_pfn_range(struct vm_area_struct *vma, unsigned long paddr,
37 unsigned long size,
38 const struct vm_operations_struct *vm_ops,
39 void *priv);
40
41struct vm_area_struct *vb2_get_vma(struct vm_area_struct *vma);
42void vb2_put_vma(struct vm_area_struct *vma);
43
44
45#endif