1 /* 2 * helper functions for physically contiguous capture buffers 3 * 4 * The functions support hardware lacking scatter gather support 5 * (i.e. the buffers must be linear in physical memory) 6 * 7 * Copyright (c) 2008 Magnus Damm 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; either version 2 12 */ 13 #ifndef _VIDEOBUF_DMA_CONTIG_H 14 #define _VIDEOBUF_DMA_CONTIG_H 15 16 #include <linux/dma-mapping.h> 17 #include <media/videobuf-core.h> 18 19 void videobuf_queue_dma_contig_init(struct videobuf_queue *q, 20 const struct videobuf_queue_ops *ops, 21 struct device *dev, 22 spinlock_t *irqlock, 23 enum v4l2_buf_type type, 24 enum v4l2_field field, 25 unsigned int msize, 26 void *priv, 27 struct mutex *ext_lock); 28 29 void videobuf_queue_dma_contig_init_cached(struct videobuf_queue *q, 30 const struct videobuf_queue_ops *ops, 31 struct device *dev, 32 spinlock_t *irqlock, 33 enum v4l2_buf_type type, 34 enum v4l2_field field, 35 unsigned int msize, 36 void *priv, 37 struct mutex *ext_lock); 38 39 dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf); 40 void videobuf_dma_contig_free(struct videobuf_queue *q, 41 struct videobuf_buffer *buf); 42 43 #endif /* _VIDEOBUF_DMA_CONTIG_H */ 44