| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 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 | dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf); |
| 30 | void videobuf_dma_contig_free(struct videobuf_queue *q, |
| 31 | struct videobuf_buffer *buf); |
| 32 | |
| 33 | #endif /* _VIDEOBUF_DMA_CONTIG_H */ |