include/media/videobuf2-memops.h

0001 /*
0002  * videobuf2-memops.h - generic memory handling routines for videobuf2
0003  *
0004  * Copyright (C) 2010 Samsung Electronics
0005  *
0006  * Author: Pawel Osciak <pawel@osciak.com>
0007  *     Marek Szyprowski <m.szyprowski@samsung.com>
0008  *
0009  * This program is free software; you can redistribute it and/or modify
0010  * it under the terms of the GNU General Public License as published by
0011  * the Free Software Foundation.
0012  */
0013
0014 #ifndef _MEDIA_VIDEOBUF2_MEMOPS_H
0015 #define _MEDIA_VIDEOBUF2_MEMOPS_H
0016
0017 #include <media/videobuf2-v4l2.h>
0018 #include <linux/mm.h>
0019 #include <linux/refcount.h>
0020
0021 /**
0022  * struct vb2_vmarea_handler - common vma refcount tracking handler.
0023  *
0024  * @refcount:   pointer to &refcount_t entry in the buffer.
0025  * @put:    callback to function that decreases buffer refcount.
0026  * @arg:    argument for @put callback.
0027  */
0028 struct vb2_vmarea_handler {
0029     refcount_t      *refcount;
0030     void            (*put)(void *arg);
0031     void            *arg;
0032 };
0033
0034 extern const struct vm_operations_struct vb2_common_vm_ops;
0035
0036 struct frame_vector *vb2_create_framevec(unsigned long start,
0037                      unsigned long length);
0038 void vb2_destroy_framevec(struct frame_vector *vec);
0039
0040 #endif