io_uring/memmap.h

   1 #ifndef IO_URING_MEMMAP_H
   2 #define IO_URING_MEMMAP_H
   3
   4 struct page **io_pin_pages(unsigned long ubuf, unsigned long len, int *npages);
   5 void io_pages_free(struct page ***pages, int npages);
   6 int io_uring_mmap_pages(struct io_ring_ctx *ctx, struct vm_area_struct *vma,
   7                         struct page **pages, int npages);
   8
   9 void *io_pages_map(struct page ***out_pages, unsigned short *npages,
  10                    size_t size);
  11 void io_pages_unmap(void *ptr, struct page ***pages, unsigned short *npages,
  12                     bool put_pages);
  13
  14 void *__io_uaddr_map(struct page ***pages, unsigned short *npages,
  15                      unsigned long uaddr, size_t size);
  16
  17 #ifndef CONFIG_MMU
  18 unsigned int io_uring_nommu_mmap_capabilities(struct file *file);
  19 #endif
  20 unsigned long io_uring_get_unmapped_area(struct file *file, unsigned long addr,
  21                                          unsigned long len, unsigned long pgoff,
  22                                          unsigned long flags);
  23 int io_uring_mmap(struct file *file, struct vm_area_struct *vma);
  24
  25 void io_free_region(struct io_ring_ctx *ctx, struct io_mapped_region *mr);
  26 int io_create_region(struct io_ring_ctx *ctx, struct io_mapped_region *mr,
  27                      struct io_uring_region_desc *reg);
  28
  29 static inline void *io_region_get_ptr(struct io_mapped_region *mr)
  30 {
  31         return mr->vmap_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