2 * videobuf2-memops.h - generic memory handling routines for videobuf2
4 * Copyright (C) 2010 Samsung Electronics
6 * Author: Pawel Osciak <pawel@osciak.com>
7 * Marek Szyprowski <m.szyprowski@samsung.com>
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.
14 #ifndef _MEDIA_VIDEOBUF2_MEMOPS_H
15 #define _MEDIA_VIDEOBUF2_MEMOPS_H
17 #include <media/videobuf2-core.h>
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
25 struct vb2_vmarea_handler {
27 void (*put)(void *arg);
31 extern const struct vm_operations_struct vb2_common_vm_ops;
33 int vb2_get_contig_userptr(unsigned long vaddr, unsigned long size,
34 struct vm_area_struct **res_vma, dma_addr_t *res_pa);
36 int vb2_mmap_pfn_range(struct vm_area_struct *vma, unsigned long paddr,
38 const struct vm_operations_struct *vm_ops,
41 struct vm_area_struct *vb2_get_vma(struct vm_area_struct *vma);
42 void vb2_put_vma(struct vm_area_struct *vma);