1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * helper functions for physically contiguous capture buffers 4 * 5 * The functions support hardware lacking scatter gather support 6 * (i.e. the buffers must be linear in physical memory) 7 * 8 * Copyright (c) 2008 Magnus Damm 9 */ 10 #ifndef _VIDEOBUF_DMA_CONTIG_H 11 #define _VIDEOBUF_DMA_CONTIG_H 12 13 #include <linux/dma-mapping.h> 14 #include <media/videobuf-core.h> 15 16 void videobuf_queue_dma_contig_init(struct videobuf_queue *q, 17 const struct videobuf_queue_ops *ops, 18 struct device *dev, 19 spinlock_t *irqlock, 20 enum v4l2_buf_type type, 21 enum v4l2_field field, 22 unsigned int msize, 23 void *priv, 24 struct mutex *ext_lock); 25 26 dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf); 27 void videobuf_dma_contig_free(struct videobuf_queue *q, 28 struct videobuf_buffer *buf); 29 30 #endif /* _VIDEOBUF_DMA_CONTIG_H */ 31