66 	if (bo->ttm)  in ttm_tt_create()
84 	bo->ttm = bdev->funcs->ttm_tt_create(bo, page_flags);  in ttm_tt_create()
85 	if (unlikely(bo->ttm == NULL))  in ttm_tt_create()
88 	WARN_ON(bo->ttm->page_flags & TTM_TT_FLAG_EXTERNAL_MAPPABLE &&  in ttm_tt_create()
89 		!(bo->ttm->page_flags & TTM_TT_FLAG_EXTERNAL));  in ttm_tt_create()
97 static int ttm_tt_alloc_page_directory(struct ttm_tt *ttm)  in ttm_tt_alloc_page_directory()  argument
99 	ttm->pages = kvcalloc(ttm->num_pages, sizeof(void*), GFP_KERNEL);  in ttm_tt_alloc_page_directory()
100 	if (!ttm->pages)  in ttm_tt_alloc_page_directory()
106 static int ttm_dma_tt_alloc_page_directory(struct ttm_tt *ttm)  in ttm_dma_tt_alloc_page_directory()  argument
108 	ttm->pages = kvcalloc(ttm->num_pages, sizeof(*ttm->pages) +  in ttm_dma_tt_alloc_page_directory()
109 			      sizeof(*ttm->dma_address), GFP_KERNEL);  in ttm_dma_tt_alloc_page_directory()
110 	if (!ttm->pages)  in ttm_dma_tt_alloc_page_directory()
113 	ttm->dma_address = (void *)(ttm->pages + ttm->num_pages);  in ttm_dma_tt_alloc_page_directory()
117 static int ttm_sg_tt_alloc_page_directory(struct ttm_tt *ttm)  in ttm_sg_tt_alloc_page_directory()  argument
119 	ttm->dma_address = kvcalloc(ttm->num_pages, sizeof(*ttm->dma_address),  in ttm_sg_tt_alloc_page_directory()
121 	if (!ttm->dma_address)  in ttm_sg_tt_alloc_page_directory()
127 void ttm_tt_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)  in ttm_tt_destroy()  argument
129 	bdev->funcs->ttm_tt_destroy(bdev, ttm);  in ttm_tt_destroy()
132 static void ttm_tt_init_fields(struct ttm_tt *ttm,  in ttm_tt_init_fields()  argument
138 	ttm->num_pages = (PAGE_ALIGN(bo->base.size) >> PAGE_SHIFT) + extra_pages;  in ttm_tt_init_fields()
139 	ttm->caching = ttm_cached;  in ttm_tt_init_fields()
140 	ttm->page_flags = page_flags;  in ttm_tt_init_fields()
141 	ttm->dma_address = NULL;  in ttm_tt_init_fields()
142 	ttm->swap_storage = NULL;  in ttm_tt_init_fields()
143 	ttm->sg = bo->sg;  in ttm_tt_init_fields()
144 	ttm->caching = caching;  in ttm_tt_init_fields()
147 int ttm_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,  in ttm_tt_init()  argument
151 	ttm_tt_init_fields(ttm, bo, page_flags, caching, extra_pages);  in ttm_tt_init()
153 	if (ttm_tt_alloc_page_directory(ttm)) {  in ttm_tt_init()
161 void ttm_tt_fini(struct ttm_tt *ttm)  in ttm_tt_fini()  argument
163 	WARN_ON(ttm->page_flags & TTM_TT_FLAG_PRIV_POPULATED);  in ttm_tt_fini()
165 	if (ttm->swap_storage)  in ttm_tt_fini()
166 		fput(ttm->swap_storage);  in ttm_tt_fini()
167 	ttm->swap_storage = NULL;  in ttm_tt_fini()
169 	if (ttm->pages)  in ttm_tt_fini()
170 		kvfree(ttm->pages);  in ttm_tt_fini()
172 		kvfree(ttm->dma_address);  in ttm_tt_fini()
173 	ttm->pages = NULL;  in ttm_tt_fini()
174 	ttm->dma_address = NULL;  in ttm_tt_fini()
178 int ttm_sg_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,  in ttm_sg_tt_init()  argument
183 	ttm_tt_init_fields(ttm, bo, page_flags, caching, 0);  in ttm_sg_tt_init()
186 		ret = ttm_sg_tt_alloc_page_directory(ttm);  in ttm_sg_tt_init()
188 		ret = ttm_dma_tt_alloc_page_directory(ttm);  in ttm_sg_tt_init()
197 int ttm_tt_swapin(struct ttm_tt *ttm)  in ttm_tt_swapin()  argument
206 	swap_storage = ttm->swap_storage;  in ttm_tt_swapin()
212 	for (i = 0; i < ttm->num_pages; ++i) {  in ttm_tt_swapin()
219 		to_page = ttm->pages[i];  in ttm_tt_swapin()
230 	ttm->swap_storage = NULL;  in ttm_tt_swapin()
231 	ttm->page_flags &= ~TTM_TT_FLAG_SWAPPED;  in ttm_tt_swapin()
249 int ttm_tt_swapout(struct ttm_device *bdev, struct ttm_tt *ttm,  in ttm_tt_swapout()  argument
252 	loff_t size = (loff_t)ttm->num_pages << PAGE_SHIFT;  in ttm_tt_swapout()
268 	for (i = 0; i < ttm->num_pages; ++i) {  in ttm_tt_swapout()
269 		from_page = ttm->pages[i];  in ttm_tt_swapout()
284 	ttm_tt_unpopulate(bdev, ttm);  in ttm_tt_swapout()
285 	ttm->swap_storage = swap_storage;  in ttm_tt_swapout()
286 	ttm->page_flags |= TTM_TT_FLAG_SWAPPED;  in ttm_tt_swapout()
288 	return ttm->num_pages;  in ttm_tt_swapout()
297 		    struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)  in ttm_tt_populate()  argument
301 	if (!ttm)  in ttm_tt_populate()
304 	if (ttm_tt_is_populated(ttm))  in ttm_tt_populate()
307 	if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {  in ttm_tt_populate()
308 		atomic_long_add(ttm->num_pages, &ttm_pages_allocated);  in ttm_tt_populate()
310 			atomic_long_add(ttm->num_pages,  in ttm_tt_populate()
326 		ret = bdev->funcs->ttm_tt_populate(bdev, ttm, ctx);  in ttm_tt_populate()
328 		ret = ttm_pool_alloc(&bdev->pool, ttm, ctx);  in ttm_tt_populate()
332 	ttm->page_flags |= TTM_TT_FLAG_PRIV_POPULATED;  in ttm_tt_populate()
333 	if (unlikely(ttm->page_flags & TTM_TT_FLAG_SWAPPED)) {  in ttm_tt_populate()
334 		ret = ttm_tt_swapin(ttm);  in ttm_tt_populate()
336 			ttm_tt_unpopulate(bdev, ttm);  in ttm_tt_populate()
344 	if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {  in ttm_tt_populate()
345 		atomic_long_sub(ttm->num_pages, &ttm_pages_allocated);  in ttm_tt_populate()
347 			atomic_long_sub(ttm->num_pages,  in ttm_tt_populate()
354 void ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm)  in ttm_tt_unpopulate()  argument
356 	if (!ttm_tt_is_populated(ttm))  in ttm_tt_unpopulate()
360 		bdev->funcs->ttm_tt_unpopulate(bdev, ttm);  in ttm_tt_unpopulate()
362 		ttm_pool_free(&bdev->pool, ttm);  in ttm_tt_unpopulate()
364 	if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {  in ttm_tt_unpopulate()
365 		atomic_long_sub(ttm->num_pages, &ttm_pages_allocated);  in ttm_tt_unpopulate()
367 			atomic_long_sub(ttm->num_pages,  in ttm_tt_unpopulate()
371 	ttm->page_flags &= ~TTM_TT_FLAG_PRIV_POPULATED;  in ttm_tt_unpopulate()