drm/ttm/ttm_pool.c

54  * @vaddr: original vaddr return for the mapping and order in the lower bits
79 /* Allocate pages of size 1 << order with the given gfp_flags */
81 					unsigned int order)
88 	/* Don't set the __GFP_COMP flag for higher order allocations.
92 	if (order)
97 		p = alloc_pages_node(pool->nid, gfp_flags, order);
99 			p->private = order;
107 	if (order)
110 	vaddr = dma_alloc_attrs(pool->dev, (1ULL << order) * PAGE_SIZE,
123 	dma->vaddr = (unsigned long)vaddr | order;
132 /* Reset the caching and pages of size 1 << order */
134 			       unsigned int order, struct page *p)
145 		set_pages_wb(p, 1 << order);
149 		__free_pages(p, order);
153 	if (order)
158 	dma_free_attrs(pool->dev, (1UL << order) * PAGE_SIZE, vaddr, dma->addr,
185 /* Map pages of 1 << order size and fill the DMA address array  */
186 static int ttm_pool_map(struct ttm_pool *pool, unsigned int order,
197 		size_t size = (1ULL << order) * PAGE_SIZE;
204 	for (i = 1 << order; i ; --i) {
212 /* Unmap pages of 1 << order size */
227 	unsigned int i, num_pages = 1 << pt->order;
239 	atomic_long_add(1 << pt->order, &allocated_pages);
250 		atomic_long_sub(1 << pt->order, &allocated_pages);
260 			       enum ttm_caching caching, unsigned int order)
264 	pt->order = order;
283 		ttm_pool_free_page(pt->pool, pt->caching, pt->order, p);
286 /* Return the pool_type to use for the given caching and order */
289 						  unsigned int order)
292 		return &pool->caching[caching].orders[order];
298 			return &pool->caching[caching].orders[order];
301 			return &global_dma32_write_combined[order];
303 		return &global_write_combined[order];
306 			return &pool->caching[caching].orders[order];
309 			return &global_dma32_uncached[order];
311 		return &global_uncached[order];
335 		ttm_pool_free_page(pt->pool, pt->caching, pt->order, p);
336 		num_pages = 1 << pt->order;
345 /* Return the allocation order based for a page */
358 static int ttm_pool_page_allocated(struct ttm_pool *pool, unsigned int order,
367 		r = ttm_pool_map(pool, order, p, dma_addr);
372 	*num_pages -= 1 << order;
373 	for (i = 1 << order; i; --i, ++(*pages), ++p)
397 	unsigned int order;
403 		order = ttm_pool_page_order(pool, *pages);
404 		nr = (1UL << order);
408 		pt = ttm_pool_select_type(pool, caching, order);
412 			ttm_pool_free_page(pool, caching, order, *pages);
438 	unsigned int order;
456 	for (order = min_t(unsigned int, MAX_PAGE_ORDER, __fls(num_pages));
458 	     order = min_t(unsigned int, order, __fls(num_pages))) {
462 		pt = ttm_pool_select_type(pool, tt->caching, order);
472 				r = ttm_pool_page_allocated(pool, order, p,
480 				if (num_pages < (1 << order))
488 		while (num_pages >= (1 << order) &&
489 		       (p = ttm_pool_alloc_page(pool, gfp_flags, order))) {
498 			r = ttm_pool_page_allocated(pool, order, p, &dma_addr,
507 			if (order) {
508 				--order;
523 	ttm_pool_free_page(pool, page_caching, order, p);
671 /* Print a nice header for the order */