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Diffstat (limited to '')
| -rw-r--r-- | include/media/videobuf-vmalloc.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/include/media/videobuf-vmalloc.h b/include/media/videobuf-vmalloc.h new file mode 100644 index 000000000..e930dbb9d --- /dev/null +++ b/include/media/videobuf-vmalloc.h @@ -0,0 +1,43 @@ +/* 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 |