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TOMOYO Linux Cross Reference
Linux/include/media/videobuf-vmalloc.h

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  1 /* SPDX-License-Identifier: GPL-2.0-only */
  2 /*
  3  * helper functions for vmalloc capture buffers
  4  *
  5  * The functions expect the hardware being able to scatter gather
  6  * (i.e. the buffers are not linear in physical memory, but fragmented
  7  * into PAGE_SIZE chunks).  They also assume the driver does not need
  8  * to touch the video data.
  9  *
 10  * (c) 2007 Mauro Carvalho Chehab, <mchehab@kernel.org>
 11  */
 12 #ifndef _VIDEOBUF_VMALLOC_H
 13 #define _VIDEOBUF_VMALLOC_H
 14 
 15 #include <media/videobuf-core.h>
 16 
 17 /* --------------------------------------------------------------------- */
 18 
 19 struct videobuf_vmalloc_memory {
 20         u32                 magic;
 21 
 22         void                *vaddr;
 23 
 24         /* remap_vmalloc_range seems to need to run
 25          * after mmap() on some cases */
 26         struct vm_area_struct *vma;
 27 };
 28 
 29 void videobuf_queue_vmalloc_init(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 void *videobuf_to_vmalloc(struct videobuf_buffer *buf);
 40 
 41 void videobuf_vmalloc_free(struct videobuf_buffer *buf);
 42 
 43 #endif
 44 

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