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43 lines
1.1 KiB
43 lines
1.1 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* helper functions for vmalloc capture buffers |
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* |
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* The functions expect the hardware being able to scatter gather |
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* (i.e. the buffers are not linear in physical memory, but fragmented |
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* into PAGE_SIZE chunks). They also assume the driver does not need |
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* to touch the video data. |
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* |
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* (c) 2007 Mauro Carvalho Chehab, <[email protected]> |
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*/ |
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#ifndef _VIDEOBUF_VMALLOC_H |
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#define _VIDEOBUF_VMALLOC_H |
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#include <media/videobuf-core.h> |
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/* --------------------------------------------------------------------- */ |
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struct videobuf_vmalloc_memory { |
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u32 magic; |
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void *vaddr; |
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/* remap_vmalloc_range seems to need to run |
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* after mmap() on some cases */ |
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struct vm_area_struct *vma; |
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}; |
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void videobuf_queue_vmalloc_init(struct videobuf_queue *q, |
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const struct videobuf_queue_ops *ops, |
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struct device *dev, |
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spinlock_t *irqlock, |
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enum v4l2_buf_type type, |
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enum v4l2_field field, |
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unsigned int msize, |
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void *priv, |
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struct mutex *ext_lock); |
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void *videobuf_to_vmalloc(struct videobuf_buffer *buf); |
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void videobuf_vmalloc_free(struct videobuf_buffer *buf); |
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#endif
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