1 #ifndef IO_URING_MEMMAP_H 2 #define IO_URING_MEMMAP_H 3 4 #define IORING_MAP_OFF_PARAM_REGION 0x20000000ULL 5 #define IORING_MAP_OFF_ZCRX_REGION 0x30000000ULL 6 7 #define IORING_OFF_ZCRX_SHIFT 16 8 9 struct page **io_pin_pages(unsigned long uaddr, unsigned long len, int *npages); 10 11 #ifndef CONFIG_MMU 12 unsigned int io_uring_nommu_mmap_capabilities(struct file *file); 13 #endif 14 unsigned long io_uring_get_unmapped_area(struct file *file, unsigned long addr, 15 unsigned long len, unsigned long pgoff, 16 unsigned long flags); 17 int io_uring_mmap(struct file *file, struct vm_area_struct *vma); 18 19 void io_free_region(struct io_ring_ctx *ctx, struct io_mapped_region *mr); 20 int io_create_region(struct io_ring_ctx *ctx, struct io_mapped_region *mr, 21 struct io_uring_region_desc *reg, 22 unsigned long mmap_offset); 23 24 int io_create_region_mmap_safe(struct io_ring_ctx *ctx, 25 struct io_mapped_region *mr, 26 struct io_uring_region_desc *reg, 27 unsigned long mmap_offset); 28 29 static inline void *io_region_get_ptr(struct io_mapped_region *mr) 30 { 31 return mr->ptr; 32 } 33 34 static inline bool io_region_is_set(struct io_mapped_region *mr) 35 { 36 return !!mr->nr_pages; 37 } 38 39 #endif 40