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()
116 	ttm->orders = kvmalloc_array(ttm->num_pages,  in ttm_tt_alloc_page_directory()
118 	if (!ttm->orders)  in ttm_tt_alloc_page_directory()
123 static int ttm_dma_tt_alloc_page_directory(struct ttm_tt *ttm)  in ttm_dma_tt_alloc_page_directory()  argument
125 	ttm->pages = kvcalloc(ttm->num_pages, sizeof(*ttm->pages) +  in ttm_dma_tt_alloc_page_directory()
126 			      sizeof(*ttm->dma_address), GFP_KERNEL);  in ttm_dma_tt_alloc_page_directory()
127 	if (!ttm->pages)  in ttm_dma_tt_alloc_page_directory()
130 	ttm->dma_address = (void *)(ttm->pages + ttm->num_pages);  in ttm_dma_tt_alloc_page_directory()
132 	ttm->orders = kvmalloc_array(ttm->num_pages,  in ttm_dma_tt_alloc_page_directory()
135 	if (!ttm->orders)  in ttm_dma_tt_alloc_page_directory()
140 static int ttm_sg_tt_alloc_page_directory(struct ttm_tt *ttm)  in ttm_sg_tt_alloc_page_directory()  argument
142 	ttm->dma_address = kvcalloc(ttm->num_pages, sizeof(*ttm->dma_address),  in ttm_sg_tt_alloc_page_directory()
144 	if (!ttm->dma_address)  in ttm_sg_tt_alloc_page_directory()
150 void ttm_tt_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)  in ttm_tt_destroy()  argument
152 	bdev->funcs->ttm_tt_destroy(bdev, ttm);  in ttm_tt_destroy()
155 static void ttm_tt_init_fields(struct ttm_tt *ttm,  in ttm_tt_init_fields()  argument
161 	ttm->num_pages = (PAGE_ALIGN(bo->base.size) >> PAGE_SHIFT) + extra_pages;  in ttm_tt_init_fields()
162 	ttm->page_flags = page_flags;  in ttm_tt_init_fields()
163 	ttm->dma_address = NULL;  in ttm_tt_init_fields()
164 	ttm->swap_storage = NULL;  in ttm_tt_init_fields()
165 	ttm->sg = bo->sg;  in ttm_tt_init_fields()
166 	ttm->caching = caching;  in ttm_tt_init_fields()
167 	ttm->dmat = bo->bdev->dmat;  in ttm_tt_init_fields()
168 	ttm->map = NULL;  in ttm_tt_init_fields()
169 	ttm->segs = NULL;  in ttm_tt_init_fields()
172 int ttm_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,  in ttm_tt_init()  argument
176 	ttm_tt_init_fields(ttm, bo, page_flags, caching, extra_pages);  in ttm_tt_init()
178 	if (ttm_tt_alloc_page_directory(ttm)) {  in ttm_tt_init()
186 void ttm_tt_fini(struct ttm_tt *ttm)  in ttm_tt_fini()  argument
188 	WARN_ON(ttm->page_flags & TTM_TT_FLAG_PRIV_POPULATED);  in ttm_tt_fini()
190 	if (ttm->swap_storage)  in ttm_tt_fini()
191 		uao_detach(ttm->swap_storage);  in ttm_tt_fini()
192 	ttm->swap_storage = NULL;  in ttm_tt_fini()
194 	if (ttm->pages)  in ttm_tt_fini()
195 		kvfree(ttm->pages);  in ttm_tt_fini()
197 		kvfree(ttm->dma_address);  in ttm_tt_fini()
198 	kvfree(ttm->orders);  in ttm_tt_fini()
199 	ttm->pages = NULL;  in ttm_tt_fini()
200 	ttm->dma_address = NULL;  in ttm_tt_fini()
201 	ttm->orders = NULL;  in ttm_tt_fini()
203 	if (ttm->map)  in ttm_tt_fini()
204 		bus_dmamap_destroy(ttm->dmat, ttm->map);  in ttm_tt_fini()
205 	if (ttm->segs)  in ttm_tt_fini()
206 		km_free(ttm->segs, round_page(ttm->num_pages *  in ttm_tt_fini()
211 int ttm_sg_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,  in ttm_sg_tt_init()  argument
217 	ttm_tt_init_fields(ttm, bo, page_flags, caching, 0);  in ttm_sg_tt_init()
220 		ret = ttm_sg_tt_alloc_page_directory(ttm);  in ttm_sg_tt_init()
222 		ret = ttm_dma_tt_alloc_page_directory(ttm);  in ttm_sg_tt_init()
228 	ttm->segs = km_alloc(round_page(ttm->num_pages *  in ttm_sg_tt_init()
233 	if (bus_dmamap_create(ttm->dmat, ttm->num_pages << PAGE_SHIFT,  in ttm_sg_tt_init()
234 	    ttm->num_pages, ttm->num_pages << PAGE_SHIFT, 0, flags,  in ttm_sg_tt_init()
235 	    &ttm->map)) {  in ttm_sg_tt_init()
236 		km_free(ttm->segs, round_page(ttm->num_pages *  in ttm_sg_tt_init()
238 		if (ttm->pages) {  in ttm_sg_tt_init()
239 			kvfree(ttm->pages);  in ttm_sg_tt_init()
240 			kvfree(ttm->orders);  in ttm_sg_tt_init()
242 			kvfree(ttm->dma_address);  in ttm_sg_tt_init()
243 		ttm->pages = NULL;  in ttm_sg_tt_init()
244 		ttm->orders = NULL;  in ttm_sg_tt_init()
245 		ttm->dma_address = NULL;  in ttm_sg_tt_init()
254 int ttm_tt_swapin(struct ttm_tt *ttm)  in ttm_tt_swapin()  argument
262 	swap_storage = ttm->swap_storage;  in ttm_tt_swapin()
266 	if (uvm_obj_wire(swap_storage, 0, ttm->num_pages << PAGE_SHIFT,  in ttm_tt_swapin()
273 	for (i = 0; i < ttm->num_pages; ++i) {  in ttm_tt_swapin()
274 		to_page = ttm->pages[i];  in ttm_tt_swapin()
284 	uvm_obj_unwire(swap_storage, 0, ttm->num_pages << PAGE_SHIFT);  in ttm_tt_swapin()
287 	ttm->swap_storage = NULL;  in ttm_tt_swapin()
288 	ttm->page_flags &= ~TTM_TT_FLAG_SWAPPED;  in ttm_tt_swapin()
306 int ttm_tt_swapout(struct ttm_device *bdev, struct ttm_tt *ttm,  in ttm_tt_swapout()  argument
312 	loff_t size = (loff_t)ttm->num_pages << PAGE_SHIFT;  in ttm_tt_swapout()
326 	for (i = 0; i < ttm->num_pages; ++i) {  in ttm_tt_swapout()
327 		from_page = ttm->pages[i];  in ttm_tt_swapout()
342 	ttm_tt_unpopulate(bdev, ttm);  in ttm_tt_swapout()
343 	ttm->swap_storage = swap_storage;  in ttm_tt_swapout()
344 	ttm->page_flags |= TTM_TT_FLAG_SWAPPED;  in ttm_tt_swapout()
346 	return ttm->num_pages;  in ttm_tt_swapout()
356 		    struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)  in ttm_tt_populate()  argument
360 	if (!ttm)  in ttm_tt_populate()
363 	if (ttm_tt_is_populated(ttm))  in ttm_tt_populate()
366 	if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {  in ttm_tt_populate()
367 		atomic_long_add(ttm->num_pages, &ttm_pages_allocated);  in ttm_tt_populate()
369 			atomic_long_add(ttm->num_pages,  in ttm_tt_populate()
385 		ret = bdev->funcs->ttm_tt_populate(bdev, ttm, ctx);  in ttm_tt_populate()
387 		ret = ttm_pool_alloc(&bdev->pool, ttm, ctx);  in ttm_tt_populate()
391 	ttm->page_flags |= TTM_TT_FLAG_PRIV_POPULATED;  in ttm_tt_populate()
392 	if (unlikely(ttm->page_flags & TTM_TT_FLAG_SWAPPED)) {  in ttm_tt_populate()
393 		ret = ttm_tt_swapin(ttm);  in ttm_tt_populate()
395 			ttm_tt_unpopulate(bdev, ttm);  in ttm_tt_populate()
403 	if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {  in ttm_tt_populate()
404 		atomic_long_sub(ttm->num_pages, &ttm_pages_allocated);  in ttm_tt_populate()
406 			atomic_long_sub(ttm->num_pages,  in ttm_tt_populate()
413 void ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm)  in ttm_tt_unpopulate()  argument
415 	if (!ttm_tt_is_populated(ttm))  in ttm_tt_unpopulate()
419 		bdev->funcs->ttm_tt_unpopulate(bdev, ttm);  in ttm_tt_unpopulate()
421 		ttm_pool_free(&bdev->pool, ttm);  in ttm_tt_unpopulate()
423 	if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {  in ttm_tt_unpopulate()
424 		atomic_long_sub(ttm->num_pages, &ttm_pages_allocated);  in ttm_tt_unpopulate()
426 			atomic_long_sub(ttm->num_pages,  in ttm_tt_unpopulate()
430 	ttm->page_flags &= ~TTM_TT_FLAG_PRIV_POPULATED;  in ttm_tt_unpopulate()