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 * struct vb2_vmarea_handler - common vma refcount tracking handler 21 * 22 * @refcount: pointer to refcount entry in the buffer 23 * @put: callback to function that decreases buffer refcount 24 * @arg: argument for @put callback 25 */ 26 struct vb2_vmarea_handler { 27 atomic_t *refcount; 28 void (*put)(void *arg); 29 void *arg; 30 }; 31 32 extern const struct vm_operations_struct vb2_common_vm_ops; 33 34 int vb2_get_contig_userptr(unsigned long vaddr, unsigned long size, 35 struct vm_area_struct **res_vma, dma_addr_t *res_pa); 36 37 struct vm_area_struct *vb2_get_vma(struct vm_area_struct *vma); 38 void vb2_put_vma(struct vm_area_struct *vma); 39 40 41 #endif 42