include/media/videobuf-dma-contig.h

   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 */