videobuf2-memops.h (9cfcc658da9693f65e7224e8329e40ada2f3c699) videobuf2-memops.h (06a660ada2064bbdcd09aeb8173f2ad128c71978)
1/*
2 * videobuf2-memops.h - generic memory handling routines for videobuf2
3 *
4 * Copyright (C) 2010 Samsung Electronics
5 *
6 * Author: Pawel Osciak <pawel@osciak.com>
7 * 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>
1/*
2 * videobuf2-memops.h - generic memory handling routines for videobuf2
3 *
4 * Copyright (C) 2010 Samsung Electronics
5 *
6 * Author: Pawel Osciak <pawel@osciak.com>
7 * 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#include <linux/mm.h>
18
19/**
20 * struct vb2_vmarea_handler - common vma refcount tracking handler
21 *
22 * @refcount: pointer to refcount entry in the buffer
23 * @put: callback to function that decreases buffer refcount
24 * @arg: argument for @put callback
25 */
26struct vb2_vmarea_handler {
27 atomic_t *refcount;
28 void (*put)(void *arg);
29 void *arg;
30};
31
32extern const struct vm_operations_struct vb2_common_vm_ops;
33
19
20/**
21 * struct vb2_vmarea_handler - common vma refcount tracking handler
22 *
23 * @refcount: pointer to refcount entry in the buffer
24 * @put: callback to function that decreases buffer refcount
25 * @arg: argument for @put callback
26 */
27struct vb2_vmarea_handler {
28 atomic_t *refcount;
29 void (*put)(void *arg);
30 void *arg;
31};
32
33extern const struct vm_operations_struct vb2_common_vm_ops;
34
34int vb2_get_contig_userptr(unsigned long vaddr, unsigned long size,
35 struct vm_area_struct **res_vma, dma_addr_t *res_pa);
35struct frame_vector *vb2_create_framevec(unsigned long start,
36 unsigned long length,
37 bool write);
38void vb2_destroy_framevec(struct frame_vector *vec);
36
39
37struct vm_area_struct *vb2_get_vma(struct vm_area_struct *vma);
38void vb2_put_vma(struct vm_area_struct *vma);
39
40
41#endif
40#endif