diff options
| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2010-12-09 16:20:47 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-03-22 02:31:34 +0300 |
| commit | 004cc3781c40a577b0349eef825efaaebc42dd43 (patch) | |
| tree | 81c066bffe8bd906a8707f6654eb9395e39dab8f /include/media | |
| parent | e23ccc0ad9258634e6d52cedf473b35dc34416c7 (diff) | |
| download | linux-004cc3781c40a577b0349eef825efaaebc42dd43.tar.xz | |
[media] v4l: videobuf2: add generic memory handling routines
Add generic memory handling routines for userspace pointer handling,
contiguous memory verification and mapping.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Pawel Osciak <p.osciak@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@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')
| -rw-r--r-- | include/media/videobuf2-memops.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/include/media/videobuf2-memops.h b/include/media/videobuf2-memops.h new file mode 100644 index 000000000000..fee17033a728 --- /dev/null +++ b/include/media/videobuf2-memops.h @@ -0,0 +1,45 @@ +/* + * videobuf2-memops.h - generic memory handling routines for videobuf2 + * + * Copyright (C) 2010 Samsung Electronics + * + * Author: Pawel Osciak <p.osciak@samsung.com> + * Marek Szyprowski <m.szyprowski@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation. + */ + +#ifndef _MEDIA_VIDEOBUF2_MEMOPS_H +#define _MEDIA_VIDEOBUF2_MEMOPS_H + +#include <media/videobuf2-core.h> + +/** + * vb2_vmarea_handler - common vma refcount tracking handler + * @refcount: pointer to refcount entry in the buffer + * @put: callback to function that decreases buffer refcount + * @arg: argument for @put callback + */ +struct vb2_vmarea_handler { + atomic_t *refcount; + void (*put)(void *arg); + void *arg; +}; + +extern const struct vm_operations_struct vb2_common_vm_ops; + +int vb2_get_contig_userptr(unsigned long vaddr, unsigned long size, + struct vm_area_struct **res_vma, dma_addr_t *res_pa); + +int vb2_mmap_pfn_range(struct vm_area_struct *vma, unsigned long paddr, + unsigned long size, + const struct vm_operations_struct *vm_ops, + void *priv); + +struct vm_area_struct *vb2_get_vma(struct vm_area_struct *vma); +void vb2_put_vma(struct vm_area_struct *vma); + + +#endif |