1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * helper functions for vmalloc capture buffers 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * The functions expect the hardware being able to scatter gather 6*4882a593Smuzhiyun * (i.e. the buffers are not linear in physical memory, but fragmented 7*4882a593Smuzhiyun * into PAGE_SIZE chunks). They also assume the driver does not need 8*4882a593Smuzhiyun * to touch the video data. 9*4882a593Smuzhiyun * 10*4882a593Smuzhiyun * (c) 2007 Mauro Carvalho Chehab, <mchehab@kernel.org> 11*4882a593Smuzhiyun */ 12*4882a593Smuzhiyun #ifndef _VIDEOBUF_VMALLOC_H 13*4882a593Smuzhiyun #define _VIDEOBUF_VMALLOC_H 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #include <media/videobuf-core.h> 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun /* --------------------------------------------------------------------- */ 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun struct videobuf_vmalloc_memory { 20*4882a593Smuzhiyun u32 magic; 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun void *vaddr; 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun /* remap_vmalloc_range seems to need to run 25*4882a593Smuzhiyun * after mmap() on some cases */ 26*4882a593Smuzhiyun struct vm_area_struct *vma; 27*4882a593Smuzhiyun }; 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun void videobuf_queue_vmalloc_init(struct videobuf_queue *q, 30*4882a593Smuzhiyun const struct videobuf_queue_ops *ops, 31*4882a593Smuzhiyun struct device *dev, 32*4882a593Smuzhiyun spinlock_t *irqlock, 33*4882a593Smuzhiyun enum v4l2_buf_type type, 34*4882a593Smuzhiyun enum v4l2_field field, 35*4882a593Smuzhiyun unsigned int msize, 36*4882a593Smuzhiyun void *priv, 37*4882a593Smuzhiyun struct mutex *ext_lock); 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun void *videobuf_to_vmalloc(struct videobuf_buffer *buf); 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun void videobuf_vmalloc_free(struct videobuf_buffer *buf); 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun #endif 44