1 files changed, 36 insertions, 10 deletions

diff --git a/io_uring/memmap.h b/io_uring/memmap.h
index 5cec5b7ac49a..a39d9e518905 100644
--- a/io_uring/memmap.h
+++ b/io_uring/memmap.h
@@ -1,18 +1,12 @@
 #ifndef IO_URING_MEMMAP_H
 #define IO_URING_MEMMAP_H
 
-struct page **io_pin_pages(unsigned long ubuf, unsigned long len, int *npages);
-void io_pages_free(struct page ***pages, int npages);
-int io_uring_mmap_pages(struct io_ring_ctx *ctx, struct vm_area_struct *vma,
-			struct page **pages, int npages);
+#define IORING_MAP_OFF_PARAM_REGION		0x20000000ULL
+#define IORING_MAP_OFF_ZCRX_REGION		0x30000000ULL
 
-void *io_pages_map(struct page ***out_pages, unsigned short *npages,
-		   size_t size);
-void io_pages_unmap(void *ptr, struct page ***pages, unsigned short *npages,
-		    bool put_pages);
+#define IORING_OFF_ZCRX_SHIFT		16
 
-void *__io_uaddr_map(struct page ***pages, unsigned short *npages,
-		     unsigned long uaddr, size_t size);
+struct page **io_pin_pages(unsigned long uaddr, unsigned long len, int *npages);
 
 #ifndef CONFIG_MMU
 unsigned int io_uring_nommu_mmap_capabilities(struct file *file);
@@ -22,4 +16,36 @@ unsigned long io_uring_get_unmapped_area(struct file *file, unsigned long addr,
 					 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