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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253/* 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