videobuf-vmalloc.h

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/*
 * helper functions for vmalloc capture buffers
 *
 * The functions expect the hardware being able to scatter gather
 * (i.e. the buffers are not linear in physical memory, but fragmented
 * into PAGE_SIZE chunks).  They also assume the driver does not need
 * to touch the video data.
 *
 * (c) 2007 Mauro Carvalho Chehab, <mchehab@infradead.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2
 */
#ifndef _VIDEOBUF_VMALLOC_H
#define _VIDEOBUF_VMALLOC_H

#include <media/videobuf-core.h>

/* --------------------------------------------------------------------- */

struct videobuf_vmalloc_memory {
    u32                 magic;

    void                *vaddr;

    /* remap_vmalloc_range seems to need to run
     * after mmap() on some cases */
    struct vm_area_struct *vma;
};

void videobuf_queue_vmalloc_init(struct videobuf_queue *q,
             const struct videobuf_queue_ops *ops,
             struct device *dev,
             spinlock_t *irqlock,
             enum v4l2_buf_type type,
             enum v4l2_field field,
             unsigned int msize,
             void *priv,
             struct mutex *ext_lock);

void *videobuf_to_vmalloc(struct videobuf_buffer *buf);

void videobuf_vmalloc_free(struct videobuf_buffer *buf);

#endif