Linux lhjmq-records 5.15.0-118-generic #128-Ubuntu SMP Fri Jul 5 09:28:59 UTC 2024 x86_64
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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* helper functions for vmalloc capture buffers
*
* The functions expect the hardware being able to scatter gather
* (i.e. the buffers are not linear in physical memory, but fragmented
* into PAGE_SIZE chunks). They also assume the driver does not need
* to touch the video data.
*
* (c) 2007 Mauro Carvalho Chehab, <mchehab@kernel.org>
*/
#ifndef _VIDEOBUF_VMALLOC_H
#define _VIDEOBUF_VMALLOC_H
#include <media/videobuf-core.h>
/* --------------------------------------------------------------------- */
struct videobuf_vmalloc_memory {
u32 magic;
void *vaddr;
/* remap_vmalloc_range seems to need to run
* after mmap() on some cases */
struct vm_area_struct *vma;
};
void videobuf_queue_vmalloc_init(struct videobuf_queue *q,
const struct videobuf_queue_ops *ops,
struct device *dev,
spinlock_t *irqlock,
enum v4l2_buf_type type,
enum v4l2_field field,
unsigned int msize,
void *priv,
struct mutex *ext_lock);
void *videobuf_to_vmalloc(struct videobuf_buffer *buf);
void videobuf_vmalloc_free(struct videobuf_buffer *buf);
#endif
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