Lines Matching refs:ttm
39 #include <drm/ttm/ttm_bo.h>
40 #include <drm/ttm/ttm_tt.h>
58 * Allocates a ttm structure for the given BO.
67 if (bo->ttm)
85 bo->ttm = bdev->funcs->ttm_tt_create(bo, page_flags);
86 if (unlikely(bo->ttm == NULL))
89 WARN_ON(bo->ttm->page_flags & TTM_TT_FLAG_EXTERNAL_MAPPABLE &&
90 !(bo->ttm->page_flags & TTM_TT_FLAG_EXTERNAL));
96 * Allocates storage for pointers to the pages that back the ttm.
98 static int ttm_tt_alloc_page_directory(struct ttm_tt *ttm)
100 ttm->pages = kvcalloc(ttm->num_pages, sizeof(void*), GFP_KERNEL);
101 if (!ttm->pages)
107 static int ttm_dma_tt_alloc_page_directory(struct ttm_tt *ttm)
109 ttm->pages = kvcalloc(ttm->num_pages, sizeof(*ttm->pages) +
110 sizeof(*ttm->dma_address), GFP_KERNEL);
111 if (!ttm->pages)
114 ttm->dma_address = (void *)(ttm->pages + ttm->num_pages);
118 static int ttm_sg_tt_alloc_page_directory(struct ttm_tt *ttm)
120 ttm->dma_address = kvcalloc(ttm->num_pages, sizeof(*ttm->dma_address),
122 if (!ttm->dma_address)
128 void ttm_tt_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
130 bdev->funcs->ttm_tt_destroy(bdev, ttm);
133 static void ttm_tt_init_fields(struct ttm_tt *ttm,
139 ttm->num_pages = (PAGE_ALIGN(bo->base.size) >> PAGE_SHIFT) + extra_pages;
140 ttm->page_flags = page_flags;
141 ttm->dma_address = NULL;
142 ttm->swap_storage = NULL;
143 ttm->sg = bo->sg;
144 ttm->caching = caching;
147 int ttm_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,
151 ttm_tt_init_fields(ttm, bo, page_flags, caching, extra_pages);
153 if (ttm_tt_alloc_page_directory(ttm)) {
161 void ttm_tt_fini(struct ttm_tt *ttm)
163 WARN_ON(ttm->page_flags & TTM_TT_FLAG_PRIV_POPULATED);
165 if (ttm->swap_storage)
166 fput(ttm->swap_storage);
167 ttm->swap_storage = NULL;
169 if (ttm->pages)
170 kvfree(ttm->pages);
172 kvfree(ttm->dma_address);
173 ttm->pages = NULL;
174 ttm->dma_address = NULL;
178 int ttm_sg_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,
183 ttm_tt_init_fields(ttm, bo, page_flags, caching, 0);
186 ret = ttm_sg_tt_alloc_page_directory(ttm);
188 ret = ttm_dma_tt_alloc_page_directory(ttm);
197 int ttm_tt_swapin(struct ttm_tt *ttm)
206 swap_storage = ttm->swap_storage;
212 for (i = 0; i < ttm->num_pages; ++i) {
219 to_page = ttm->pages[i];
230 ttm->swap_storage = NULL;
231 ttm->page_flags &= ~TTM_TT_FLAG_SWAPPED;
243 * @ttm: The struct ttm_tt.
249 int ttm_tt_swapout(struct ttm_device *bdev, struct ttm_tt *ttm,
252 loff_t size = (loff_t)ttm->num_pages << PAGE_SHIFT;
259 swap_storage = shmem_file_setup("ttm swap", size, 0);
268 for (i = 0; i < ttm->num_pages; ++i) {
269 from_page = ttm->pages[i];
284 ttm_tt_unpopulate(bdev, ttm);
285 ttm->swap_storage = swap_storage;
286 ttm->page_flags |= TTM_TT_FLAG_SWAPPED;
288 return ttm->num_pages;
297 struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
301 if (!ttm)
304 if (ttm_tt_is_populated(ttm))
307 if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {
308 atomic_long_add(ttm->num_pages, &ttm_pages_allocated);
310 atomic_long_add(ttm->num_pages,
326 ret = bdev->funcs->ttm_tt_populate(bdev, ttm, ctx);
328 ret = ttm_pool_alloc(&bdev->pool, ttm, ctx);
332 ttm->page_flags |= TTM_TT_FLAG_PRIV_POPULATED;
333 if (unlikely(ttm->page_flags & TTM_TT_FLAG_SWAPPED)) {
334 ret = ttm_tt_swapin(ttm);
336 ttm_tt_unpopulate(bdev, ttm);
344 if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {
345 atomic_long_sub(ttm->num_pages, &ttm_pages_allocated);
347 atomic_long_sub(ttm->num_pages,
354 void ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm)
356 if (!ttm_tt_is_populated(ttm))
360 bdev->funcs->ttm_tt_unpopulate(bdev, ttm);
362 ttm_pool_free(&bdev->pool, ttm);
364 if (!(ttm->page_flags & TTM_TT_FLAG_EXTERNAL)) {
365 atomic_long_sub(ttm->num_pages, &ttm_pages_allocated);
367 atomic_long_sub(ttm->num_pages,
371 ttm->page_flags &= ~TTM_TT_FLAG_PRIV_POPULATED;