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TOMOYO Linux Cross Reference
Linux/include/media/videobuf-dma-contig.h

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  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 

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