16  * Main data structure for tracking mapped user pages of bitmap data.
90  * which u64 word of the bitmap is mapped, up to @mapped_total_index.
94  * The IOVA bitmap is usually located on what tracks DMA mapped ranges or
99 	/* IOVA range representing the currently mapped bitmap data */
100 	struct iova_bitmap_map mapped;  member
105 	/* u64 index that @mapped points to */
125  * Relative IOVA means relative to the bitmap::mapped base IOVA
126  * (stored in mapped::iova). All computations in this file are done using
127  * relative IOVAs and thus avoid an extra subtraction against mapped::iova.
133 	unsigned long pgsize = 1 << bitmap->mapped.pgshift;  in iova_bitmap_offset_to_index()
144 	unsigned long pgshift = bitmap->mapped.pgshift;  in iova_bitmap_index_to_offset()
150  * Returns the base IOVA of the mapped range.
166 	struct iova_bitmap_map *mapped = &bitmap->mapped;  in iova_bitmap_get()  local
172 	 * @mapped_base_index is the index of the currently mapped u64 words  in iova_bitmap_get()
174 	 * mapped. The range @mapped_base_index .. @mapped_total_index-1 is  in iova_bitmap_get()
175 	 * mapped but capped at a maximum number of pages.  in iova_bitmap_get()
195 				  FOLL_WRITE, mapped->pages);  in iova_bitmap_get()
199 	mapped->npages = (unsigned long)ret;  in iova_bitmap_get()
201 	mapped->iova = iova_bitmap_mapped_iova(bitmap);  in iova_bitmap_get()
208 	mapped->pgoff = offset_in_page(addr);  in iova_bitmap_get()
219 	struct iova_bitmap_map *mapped = &bitmap->mapped;  in iova_bitmap_put()  local
221 	if (mapped->npages) {  in iova_bitmap_put()
222 		unpin_user_pages(mapped->pages, mapped->npages);  in iova_bitmap_put()
223 		mapped->npages = 0;  in iova_bitmap_put()
244 	struct iova_bitmap_map *mapped;  in iova_bitmap_alloc()  local
252 	mapped = &bitmap->mapped;  in iova_bitmap_alloc()
253 	mapped->pgshift = __ffs(page_size);  in iova_bitmap_alloc()
259 	mapped->iova = iova;  in iova_bitmap_alloc()
260 	mapped->pages = (struct page **)__get_free_page(GFP_KERNEL);  in iova_bitmap_alloc()
261 	if (!mapped->pages) {  in iova_bitmap_alloc()
286 	struct iova_bitmap_map *mapped = &bitmap->mapped;  in iova_bitmap_free()  local
290 	if (mapped->pages) {  in iova_bitmap_free()
291 		free_page((unsigned long)mapped->pages);  in iova_bitmap_free()
292 		mapped->pages = NULL;  in iova_bitmap_free()
307 	bytes = (bitmap->mapped.npages << PAGE_SHIFT) - bitmap->mapped.pgoff;  in iova_bitmap_mapped_remaining()
317  * Returns the length of the mapped IOVA range.
411  * mapped bitmap user pages into IOVA ranges to process.
446 	struct iova_bitmap_map *mapped = &bitmap->mapped;  in iova_bitmap_set()  local
447 	unsigned long cur_bit = ((iova - mapped->iova) >>  in iova_bitmap_set()
448 			mapped->pgshift) + mapped->pgoff * BITS_PER_BYTE;  in iova_bitmap_set()
449 	unsigned long last_bit = (((iova + length - 1) - mapped->iova) >>  in iova_bitmap_set()
450 			mapped->pgshift) + mapped->pgoff * BITS_PER_BYTE;  in iova_bitmap_set()
451 	unsigned long last_page_idx = mapped->npages - 1;  in iova_bitmap_set()
463 		kaddr = kmap_local_page(mapped->pages[page_idx]);  in iova_bitmap_set()
471 			((last_bit - cur_bit + 1) << bitmap->mapped.pgshift);  in iova_bitmap_set()