/* SPDX-License-Identifier: GPL-2.0 */#ifndef IO_URING_MEMMAP_H#define IO_URING_MEMMAP_H #define IORING_MAP_OFF_PARAM_REGION		0x20000000ULL#define IORING_MAP_OFF_ZCRX_REGION		0x30000000ULL #define IORING_OFF_ZCRX_SHIFT		16 struct page **io_pin_pages(unsigned long uaddr, unsigned long len, int *npages); #ifndef CONFIG_MMUunsigned int io_uring_nommu_mmap_capabilities(struct file *file);#endifunsigned long io_uring_get_unmapped_area(struct file *file, unsigned long addr,					 unsigned long len, unsigned long pgoff,					 unsigned long flags);int io_uring_mmap(struct file *file, struct vm_area_struct *vma); void io_free_region(struct user_struct *user, struct io_mapped_region *mr);int io_create_region(struct io_ring_ctx *ctx, struct io_mapped_region *mr,		     struct io_uring_region_desc *reg,		     unsigned long mmap_offset); static inline void *io_region_get_ptr(struct io_mapped_region *mr){	return mr->ptr;} static inline bool io_region_is_set(struct io_mapped_region *mr){	return !!mr->nr_pages;} static inline void io_region_publish(struct io_ring_ctx *ctx,				     struct io_mapped_region *src_region,				     struct io_mapped_region *dst_region){	/*	 * Once published mmap can find it without holding only the ->mmap_lock	 * and not ->uring_lock.	 */	guard(mutex)(&ctx->mmap_lock);	*dst_region = *src_region;} static inline size_t io_region_size(struct io_mapped_region *mr){	return (size_t) mr->nr_pages << PAGE_SHIFT;} #endif