| 1 | /* |
| 2 | * helper functions for vmalloc capture buffers |
| 3 | * |
| 4 | * The functions expect the hardware being able to scatter gather |
| 5 | * (i.e. the buffers are not linear in physical memory, but fragmented |
| 6 | * into PAGE_SIZE chunks). They also assume the driver does not need |
| 7 | * to touch the video data. |
| 8 | * |
| 9 | * (c) 2007 Mauro Carvalho Chehab, <mchehab@infradead.org> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 |
| 14 | */ |
| 15 | #ifndef _VIDEOBUF_VMALLOC_H |
| 16 | #define _VIDEOBUF_VMALLOC_H |
| 17 | |
| 18 | #include <media/videobuf-core.h> |
| 19 | |
| 20 | /* --------------------------------------------------------------------- */ |
| 21 | |
| 22 | struct videobuf_vmalloc_memory { |
| 23 | u32 magic; |
| 24 | |
| 25 | void *vaddr; |
| 26 | |
| 27 | /* remap_vmalloc_range seems to need to run |
| 28 | * after mmap() on some cases */ |
| 29 | struct vm_area_struct *vma; |
| 30 | }; |
| 31 | |
| 32 | void videobuf_queue_vmalloc_init(struct videobuf_queue *q, |
| 33 | const struct videobuf_queue_ops *ops, |
| 34 | struct device *dev, |
| 35 | spinlock_t *irqlock, |
| 36 | enum v4l2_buf_type type, |
| 37 | enum v4l2_field field, |
| 38 | unsigned int msize, |
| 39 | void *priv, |
| 40 | struct mutex *ext_lock); |
| 41 | |
| 42 | void *videobuf_to_vmalloc(struct videobuf_buffer *buf); |
| 43 | |
| 44 | void videobuf_vmalloc_free(struct videobuf_buffer *buf); |
| 45 | |
| 46 | #endif |