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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 |
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