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-v4l2.h>
18#include <linux/mm.h>
19#include <linux/refcount.h>
20
21/**
22 * struct vb2_vmarea_handler - common vma refcount tracking handler.
23 *
24 * @refcount:	pointer to &refcount_t entry in the buffer.
25 * @put:	callback to function that decreases buffer refcount.
26 * @arg:	argument for @put callback.
27 */
28struct vb2_vmarea_handler {
29	refcount_t		*refcount;
30	void			(*put)(void *arg);
31	void			*arg;
32};
33
34extern const struct vm_operations_struct vb2_common_vm_ops;
35
36struct frame_vector *vb2_create_framevec(unsigned long start,
37					 unsigned long length,
38					 bool write);
39void vb2_destroy_framevec(struct frame_vector *vec);
 
 
 
 
 
 
 
40
41#endif

 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
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