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