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-v4l2.h> 18 #include <linux/mm.h> 19 #include <linux/refcount.h> 20 21 /** 22 * struct vb2_vmarea_handler - common vma refcount tracking handler. 23 * 24 * @refcount: pointer to &refcount_t entry in the buffer. 25 * @put: callback to function that decreases buffer refcount. 26 * @arg: argument for @put callback. 27 */ 28 struct vb2_vmarea_handler { 29 refcount_t *refcount; 30 void (*put)(void *arg); 31 void *arg; 32 }; 33 34 extern const struct vm_operations_struct vb2_common_vm_ops; 35 36 struct frame_vector *vb2_create_framevec(unsigned long start, 37 unsigned long length, 38 bool write); 39 void vb2_destroy_framevec(struct frame_vector *vec); 40 41 #endif 42