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  */
25 struct vb2_vmarea_handler {
26 	atomic_t		*refcount;
27 	void			(*put)(void *arg);
28 	void			*arg;
29 };
30 
31 extern const struct vm_operations_struct vb2_common_vm_ops;
32 
33 int vb2_get_contig_userptr(unsigned long vaddr, unsigned long size,
34 			   struct vm_area_struct **res_vma, dma_addr_t *res_pa);
35 
36 struct vm_area_struct *vb2_get_vma(struct vm_area_struct *vma);
37 void vb2_put_vma(struct vm_area_struct *vma);
38 
39 
40 #endif
41