71 	if (bo->ttm)  in ttm_tt_create()
98 	bo->ttm = bdev->funcs->ttm_tt_create(bo, page_flags);  in ttm_tt_create()
99 	if (unlikely(bo->ttm == NULL))  in ttm_tt_create()
102 	WARN_ON(bo->ttm->page_flags & TTM_TT_FLAG_EXTERNAL_MAPPABLE &&  in ttm_tt_create()
103 		!(bo->ttm->page_flags & TTM_TT_FLAG_EXTERNAL));  in ttm_tt_create()
111 static int ttm_tt_alloc_page_directory(struct ttm_tt *ttm)  in ttm_tt_alloc_page_directory()  argument
113 	ttm->pages = kvcalloc(ttm->num_pages, sizeof(void*), GFP_KERNEL);  in ttm_tt_alloc_page_directory()
114 	if (!ttm->pages)  in ttm_tt_alloc_page_directory()
120 static int ttm_dma_tt_alloc_page_directory(struct ttm_tt *ttm)  in ttm_dma_tt_alloc_page_directory()  argument
122 	ttm->pages = kvcalloc(ttm->num_pages, sizeof(*ttm->pages) +  in ttm_dma_tt_alloc_page_directory()
123 			      sizeof(*ttm->dma_address), GFP_KERNEL);  in ttm_dma_tt_alloc_page_directory()
124 	if (!ttm->pages)  in ttm_dma_tt_alloc_page_directory()
127 	ttm->dma_address = (void *)(ttm->pages + ttm->num_pages);  in ttm_dma_tt_alloc_page_directory()
131 static int ttm_sg_tt_alloc_page_directory(struct ttm_tt *ttm)  in ttm_sg_tt_alloc_page_directory()  argument
133 	ttm->dma_address = kvcalloc(ttm->num_pages, sizeof(*ttm->dma_address),  in ttm_sg_tt_alloc_page_directory()
135 	if (!ttm->dma_address)  in ttm_sg_tt_alloc_page_directory()
141 void ttm_tt_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)  in ttm_tt_destroy()  argument
143 	bdev->funcs->ttm_tt_destroy(bdev, ttm);  in ttm_tt_destroy()
146 static void ttm_tt_init_fields(struct ttm_tt *ttm,  in ttm_tt_init_fields()  argument
152 	ttm->num_pages = (PAGE_ALIGN(bo->base.size) >> PAGE_SHIFT) + extra_pages;  in ttm_tt_init_fields()
153 	ttm->page_flags = page_flags;  in ttm_tt_init_fields()
154 	ttm->dma_address = NULL;  in ttm_tt_init_fields()
155 	ttm->swap_storage = NULL;  in ttm_tt_init_fields()
156 	ttm->sg = bo->sg;  in ttm_tt_init_fields()
157 	ttm->caching = caching;  in ttm_tt_init_fields()
160 int ttm_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,  in ttm_tt_init()  argument
164 	ttm_tt_init_fields(ttm, bo, page_flags, caching, extra_pages);  in ttm_tt_init()
166 	if (ttm_tt_alloc_page_directory(ttm)) {  in ttm_tt_init()
174 void ttm_tt_fini(struct ttm_tt *ttm)  in ttm_tt_fini()  argument
176 	WARN_ON(ttm->page_flags & TTM_TT_FLAG_PRIV_POPULATED);  in ttm_tt_fini()
178 	if (ttm->swap_storage)  in ttm_tt_fini()
179 		fput(ttm->swap_storage);  in ttm_tt_fini()
180 	ttm->swap_storage = NULL;  in ttm_tt_fini()
182 	if (ttm->pages)  in ttm_tt_fini()
183 		kvfree(ttm->pages);  in ttm_tt_fini()
185 		kvfree(ttm->dma_address);  in ttm_tt_fini()
186 	ttm->pages = NULL;  in ttm_tt_fini()
187 	ttm->dma_address = NULL;  in ttm_tt_fini()
191 int ttm_sg_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,  in ttm_sg_tt_init()  argument
196 	ttm_tt_init_fields(ttm, bo, page_flags, caching, 0);  in ttm_sg_tt_init()
199 		ret = ttm_sg_tt_alloc_page_directory(ttm);  in ttm_sg_tt_init()
201 		ret = ttm_dma_tt_alloc_page_directory(ttm);  in ttm_sg_tt_init()
210 int ttm_tt_swapin(struct ttm_tt *ttm)  in ttm_tt_swapin()  argument
219 	swap_storage = ttm->swap_storage;  in ttm_tt_swapin()
225 	for (i = 0; i < ttm->num_pages; ++i) {  in ttm_tt_swapin()
232 		to_page = ttm->pages[i];  in ttm_tt_swapin()
243 	ttm->swap_storage = NULL;  in ttm_tt_swapin()
244 	ttm->page_flags &= ~TTM_TT_FLAG_SWAPPED;  in ttm_tt_swapin()
262 int ttm_tt_swapout(struct ttm_device *bdev, struct ttm_tt *ttm,  in ttm_tt_swapout()  argument
265 	loff_t size = (loff_t)ttm->num_pages << PAGE_SHIFT;  in ttm_tt_swapout()
281 	for (i = 0; i < ttm->num_pages; ++i) {  in ttm_tt_swapout()
282 		from_page = ttm->pages[i];  in ttm_tt_swapout()
297 	ttm_tt_unpopulate(bdev, ttm);  in ttm_tt_swapout()
298 	ttm->swap_storage = swap_storage;  in ttm_tt_swapout()
299 	ttm->page_flags |= TTM_TT_FLAG_SWAPPED;  in ttm_tt_swapout()
301 	return ttm->num_pages;  in ttm_tt_swapout()
310 		    struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)  in ttm_tt_populate()  argument
314 	if (!ttm)  in ttm_tt_populate()
317 	if (ttm_tt_is_populated(ttm))  in ttm_tt_populate()
320 	if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {  in ttm_tt_populate()
321 		atomic_long_add(ttm->num_pages, &ttm_pages_allocated);  in ttm_tt_populate()
323 			atomic_long_add(ttm->num_pages,  in ttm_tt_populate()
339 		ret = bdev->funcs->ttm_tt_populate(bdev, ttm, ctx);  in ttm_tt_populate()
341 		ret = ttm_pool_alloc(&bdev->pool, ttm, ctx);  in ttm_tt_populate()
345 	ttm->page_flags |= TTM_TT_FLAG_PRIV_POPULATED;  in ttm_tt_populate()
346 	if (unlikely(ttm->page_flags & TTM_TT_FLAG_SWAPPED)) {  in ttm_tt_populate()
347 		ret = ttm_tt_swapin(ttm);  in ttm_tt_populate()
349 			ttm_tt_unpopulate(bdev, ttm);  in ttm_tt_populate()
357 	if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {  in ttm_tt_populate()
358 		atomic_long_sub(ttm->num_pages, &ttm_pages_allocated);  in ttm_tt_populate()
360 			atomic_long_sub(ttm->num_pages,  in ttm_tt_populate()
367 void ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm)  in ttm_tt_unpopulate()  argument
369 	if (!ttm_tt_is_populated(ttm))  in ttm_tt_unpopulate()
373 		bdev->funcs->ttm_tt_unpopulate(bdev, ttm);  in ttm_tt_unpopulate()
375 		ttm_pool_free(&bdev->pool, ttm);  in ttm_tt_unpopulate()
377 	if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {  in ttm_tt_unpopulate()
378 		atomic_long_sub(ttm->num_pages, &ttm_pages_allocated);  in ttm_tt_unpopulate()
380 			atomic_long_sub(ttm->num_pages,  in ttm_tt_unpopulate()
384 	ttm->page_flags &= ~TTM_TT_FLAG_PRIV_POPULATED;  in ttm_tt_unpopulate()