579 static int uio_find_mem_index(struct vm_area_struct *vma)  in uio_find_mem_index()  argument
581 	struct uio_device *idev = vma->vm_private_data;  in uio_find_mem_index()
583 	if (vma->vm_pgoff < MAX_UIO_MAPS) {  in uio_find_mem_index()
584 		if (idev->info->mem[vma->vm_pgoff].size == 0)  in uio_find_mem_index()
586 		return (int)vma->vm_pgoff;  in uio_find_mem_index()
591 static int uio_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)  in uio_vma_fault()  argument
593 	struct uio_device *idev = vma->vm_private_data;  in uio_vma_fault()
598 	int mi = uio_find_mem_index(vma);  in uio_vma_fault()
622 static int uio_mmap_logical(struct vm_area_struct *vma)  in uio_mmap_logical()  argument
624 	vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;  in uio_mmap_logical()
625 	vma->vm_ops = &uio_logical_vm_ops;  in uio_mmap_logical()
635 static int uio_mmap_physical(struct vm_area_struct *vma)  in uio_mmap_physical()  argument
637 	struct uio_device *idev = vma->vm_private_data;  in uio_mmap_physical()
638 	int mi = uio_find_mem_index(vma);  in uio_mmap_physical()
646 	if (vma->vm_end - vma->vm_start > mem->size)  in uio_mmap_physical()
649 	vma->vm_ops = &uio_physical_vm_ops;  in uio_mmap_physical()
650 	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);  in uio_mmap_physical()
661 	return remap_pfn_range(vma,  in uio_mmap_physical()
662 			       vma->vm_start,  in uio_mmap_physical()
664 			       vma->vm_end - vma->vm_start,  in uio_mmap_physical()
665 			       vma->vm_page_prot);  in uio_mmap_physical()
668 static int uio_mmap(struct file *filep, struct vm_area_struct *vma)  in uio_mmap()  argument
676 	if (vma->vm_end < vma->vm_start)  in uio_mmap()
679 	vma->vm_private_data = idev;  in uio_mmap()
681 	mi = uio_find_mem_index(vma);  in uio_mmap()
685 	requested_pages = vma_pages(vma);  in uio_mmap()
692 		ret = idev->info->mmap(idev->info, vma);  in uio_mmap()
698 			return uio_mmap_physical(vma);  in uio_mmap()
701 			return uio_mmap_logical(vma);  in uio_mmap()