72 	if (bo->ttm)  in ttm_tt_create()
99 	bo->ttm = bdev->funcs->ttm_tt_create(bo, page_flags);  in ttm_tt_create()
100 	if (unlikely(bo->ttm == NULL))  in ttm_tt_create()
103 	WARN_ON(bo->ttm->page_flags & TTM_TT_FLAG_EXTERNAL_MAPPABLE &&  in ttm_tt_create()
104 		!(bo->ttm->page_flags & TTM_TT_FLAG_EXTERNAL));  in ttm_tt_create()
113 static int ttm_tt_alloc_page_directory(struct ttm_tt *ttm)  in ttm_tt_alloc_page_directory()  argument
115 	ttm->pages = kvcalloc(ttm->num_pages, sizeof(void*), GFP_KERNEL);  in ttm_tt_alloc_page_directory()
116 	if (!ttm->pages)  in ttm_tt_alloc_page_directory()
122 static int ttm_dma_tt_alloc_page_directory(struct ttm_tt *ttm)  in ttm_dma_tt_alloc_page_directory()  argument
124 	ttm->pages = kvcalloc(ttm->num_pages, sizeof(*ttm->pages) +  in ttm_dma_tt_alloc_page_directory()
125 			      sizeof(*ttm->dma_address), GFP_KERNEL);  in ttm_dma_tt_alloc_page_directory()
126 	if (!ttm->pages)  in ttm_dma_tt_alloc_page_directory()
129 	ttm->dma_address = (void *)(ttm->pages + ttm->num_pages);  in ttm_dma_tt_alloc_page_directory()
133 static int ttm_sg_tt_alloc_page_directory(struct ttm_tt *ttm)  in ttm_sg_tt_alloc_page_directory()  argument
135 	ttm->dma_address = kvcalloc(ttm->num_pages, sizeof(*ttm->dma_address),  in ttm_sg_tt_alloc_page_directory()
137 	if (!ttm->dma_address)  in ttm_sg_tt_alloc_page_directory()
143 void ttm_tt_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)  in ttm_tt_destroy()  argument
145 	bdev->funcs->ttm_tt_destroy(bdev, ttm);  in ttm_tt_destroy()
149 static void ttm_tt_init_fields(struct ttm_tt *ttm,  in ttm_tt_init_fields()  argument
155 	ttm->num_pages = (PAGE_ALIGN(bo->base.size) >> PAGE_SHIFT) + extra_pages;  in ttm_tt_init_fields()
156 	ttm->page_flags = page_flags;  in ttm_tt_init_fields()
157 	ttm->dma_address = NULL;  in ttm_tt_init_fields()
158 	ttm->swap_storage = NULL;  in ttm_tt_init_fields()
159 	ttm->sg = bo->sg;  in ttm_tt_init_fields()
160 	ttm->caching = caching;  in ttm_tt_init_fields()
163 int ttm_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,  in ttm_tt_init()  argument
167 	ttm_tt_init_fields(ttm, bo, page_flags, caching, extra_pages);  in ttm_tt_init()
169 	if (ttm_tt_alloc_page_directory(ttm)) {  in ttm_tt_init()
177 void ttm_tt_fini(struct ttm_tt *ttm)  in ttm_tt_fini()  argument
179 	WARN_ON(ttm->page_flags & TTM_TT_FLAG_PRIV_POPULATED);  in ttm_tt_fini()
181 	if (ttm->swap_storage)  in ttm_tt_fini()
182 		fput(ttm->swap_storage);  in ttm_tt_fini()
183 	ttm->swap_storage = NULL;  in ttm_tt_fini()
185 	if (ttm->pages)  in ttm_tt_fini()
186 		kvfree(ttm->pages);  in ttm_tt_fini()
188 		kvfree(ttm->dma_address);  in ttm_tt_fini()
189 	ttm->pages = NULL;  in ttm_tt_fini()
190 	ttm->dma_address = NULL;  in ttm_tt_fini()
194 int ttm_sg_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,  in ttm_sg_tt_init()  argument
199 	ttm_tt_init_fields(ttm, bo, page_flags, caching, 0);  in ttm_sg_tt_init()
202 		ret = ttm_sg_tt_alloc_page_directory(ttm);  in ttm_sg_tt_init()
204 		ret = ttm_dma_tt_alloc_page_directory(ttm);  in ttm_sg_tt_init()
213 int ttm_tt_swapin(struct ttm_tt *ttm)  in ttm_tt_swapin()  argument
222 	swap_storage = ttm->swap_storage;  in ttm_tt_swapin()
228 	for (i = 0; i < ttm->num_pages; ++i) {  in ttm_tt_swapin()
235 		to_page = ttm->pages[i];  in ttm_tt_swapin()
246 	ttm->swap_storage = NULL;  in ttm_tt_swapin()
247 	ttm->page_flags &= ~TTM_TT_FLAG_SWAPPED;  in ttm_tt_swapin()
266 int ttm_tt_swapout(struct ttm_device *bdev, struct ttm_tt *ttm,  in ttm_tt_swapout()  argument
269 	loff_t size = (loff_t)ttm->num_pages << PAGE_SHIFT;  in ttm_tt_swapout()
285 	for (i = 0; i < ttm->num_pages; ++i) {  in ttm_tt_swapout()
286 		from_page = ttm->pages[i];  in ttm_tt_swapout()
301 	ttm_tt_unpopulate(bdev, ttm);  in ttm_tt_swapout()
302 	ttm->swap_storage = swap_storage;  in ttm_tt_swapout()
303 	ttm->page_flags |= TTM_TT_FLAG_SWAPPED;  in ttm_tt_swapout()
305 	return ttm->num_pages;  in ttm_tt_swapout()
315 		    struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)  in ttm_tt_populate()  argument
319 	if (!ttm)  in ttm_tt_populate()
322 	if (ttm_tt_is_populated(ttm))  in ttm_tt_populate()
325 	if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {  in ttm_tt_populate()
326 		atomic_long_add(ttm->num_pages, &ttm_pages_allocated);  in ttm_tt_populate()
328 			atomic_long_add(ttm->num_pages,  in ttm_tt_populate()
344 		ret = bdev->funcs->ttm_tt_populate(bdev, ttm, ctx);  in ttm_tt_populate()
346 		ret = ttm_pool_alloc(&bdev->pool, ttm, ctx);  in ttm_tt_populate()
350 	ttm->page_flags |= TTM_TT_FLAG_PRIV_POPULATED;  in ttm_tt_populate()
351 	if (unlikely(ttm->page_flags & TTM_TT_FLAG_SWAPPED)) {  in ttm_tt_populate()
352 		ret = ttm_tt_swapin(ttm);  in ttm_tt_populate()
354 			ttm_tt_unpopulate(bdev, ttm);  in ttm_tt_populate()
362 	if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {  in ttm_tt_populate()
363 		atomic_long_sub(ttm->num_pages, &ttm_pages_allocated);  in ttm_tt_populate()
365 			atomic_long_sub(ttm->num_pages,  in ttm_tt_populate()
372 void ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm)  in ttm_tt_unpopulate()  argument
374 	if (!ttm_tt_is_populated(ttm))  in ttm_tt_unpopulate()
378 		bdev->funcs->ttm_tt_unpopulate(bdev, ttm);  in ttm_tt_unpopulate()
380 		ttm_pool_free(&bdev->pool, ttm);  in ttm_tt_unpopulate()
382 	if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {  in ttm_tt_unpopulate()
383 		atomic_long_sub(ttm->num_pages, &ttm_pages_allocated);  in ttm_tt_unpopulate()
385 			atomic_long_sub(ttm->num_pages,  in ttm_tt_unpopulate()
389 	ttm->page_flags &= ~TTM_TT_FLAG_PRIV_POPULATED;  in ttm_tt_unpopulate()