diff options
author | Andrzej Pietrasiewicz <andrzej.p@samsung.com> | 2010-11-29 09:53:34 -0500 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-03-21 19:31:34 -0400 |
commit | 5ba3f757f0592ca001266b4a6214d0332349909c (patch) | |
tree | 6d633613aa60123712488647b56341ba41e5e7b2 /include/media/videobuf2-dma-sg.h | |
parent | 1a758d4e847f7743ac1b5aa79fde3ba2d8b5132b (diff) |
[media] v4l: videobuf2: add DMA scatter/gather allocator
Add an implementation of DMA scatter/gather allocator and handling
routines for videobuf2.
For mmap operation mode it is implemented on top of
alloc_page + sg_set_page/_free_page.
For userptr operation mode it is implemented on top of
get_user_pages + sg_set_page/put_page.
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
CC: Pawel Osciak <pawel@osciak.com>
Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'include/media/videobuf2-dma-sg.h')
-rw-r--r-- | include/media/videobuf2-dma-sg.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/media/videobuf2-dma-sg.h b/include/media/videobuf2-dma-sg.h new file mode 100644 index 000000000000..0038526b8ef7 --- /dev/null +++ b/include/media/videobuf2-dma-sg.h | |||
@@ -0,0 +1,32 @@ | |||
1 | /* | ||
2 | * videobuf2-dma-sg.h - DMA scatter/gather memory allocator for videobuf2 | ||
3 | * | ||
4 | * Copyright (C) 2010 Samsung Electronics | ||
5 | * | ||
6 | * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com> | ||
7 | * | ||
8 | * This program is free software; you can redistribute it and/or modify | ||
9 | * it under the terms of the GNU General Public License as published by | ||
10 | * the Free Software Foundation. | ||
11 | */ | ||
12 | |||
13 | #ifndef _MEDIA_VIDEOBUF2_DMA_SG_H | ||
14 | #define _MEDIA_VIDEOBUF2_DMA_SG_H | ||
15 | |||
16 | #include <media/videobuf2-core.h> | ||
17 | |||
18 | struct vb2_dma_sg_desc { | ||
19 | unsigned long size; | ||
20 | unsigned int num_pages; | ||
21 | struct scatterlist *sglist; | ||
22 | }; | ||
23 | |||
24 | static inline struct vb2_dma_sg_desc *vb2_dma_sg_plane_desc( | ||
25 | struct vb2_buffer *vb, unsigned int plane_no) | ||
26 | { | ||
27 | return (struct vb2_dma_sg_desc *)vb2_plane_cookie(vb, plane_no); | ||
28 | } | ||
29 | |||
30 | extern const struct vb2_mem_ops vb2_dma_sg_memops; | ||
31 | |||
32 | #endif | ||