46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
/*
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* helper functions for vmalloc capture buffers
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*
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* The functions expect the hardware being able to scatter gather
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* (i.e. the buffers are not linear in physical memory, but fragmented
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* into PAGE_SIZE chunks). They also assume the driver does not need
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* to touch the video data.
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*
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* (c) 2007 Mauro Carvalho Chehab, <mchehab@infradead.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2
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*/
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#ifndef _VIDEOBUF_VMALLOC_H
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#define _VIDEOBUF_VMALLOC_H
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#include <media/videobuf-core.h>
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/* --------------------------------------------------------------------- */
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struct videobuf_vmalloc_memory {
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u32 magic;
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void *vmalloc;
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/* remap_vmalloc_range seems to need to run
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* after mmap() on some cases */
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struct vm_area_struct *vma;
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};
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void videobuf_queue_vmalloc_init(struct videobuf_queue *q,
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const struct videobuf_queue_ops *ops,
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struct device *dev,
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spinlock_t *irqlock,
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enum v4l2_buf_type type,
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enum v4l2_field field,
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unsigned int msize,
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void *priv);
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void *videobuf_to_vmalloc(struct videobuf_buffer *buf);
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void videobuf_vmalloc_free(struct videobuf_buffer *buf);
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#endif
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