mlx5/core/alloc.c

137 	struct mlx5_db_pgdir *pgdir;
139 	pgdir = kzalloc_node(sizeof(*pgdir), GFP_KERNEL, node);
140 	if (!pgdir)
143 	pgdir->bitmap = bitmap_zalloc_node(db_per_page, GFP_KERNEL, node);
144 	if (!pgdir->bitmap) {
145 		kfree(pgdir);
149 	bitmap_fill(pgdir->bitmap, db_per_page);
151 	pgdir->db_page = mlx5_dma_zalloc_coherent_node(dev, PAGE_SIZE,
152 						       &pgdir->db_dma, node);
153 	if (!pgdir->db_page) {
154 		bitmap_free(pgdir->bitmap);
155 		kfree(pgdir);
159 	return pgdir;
162 static int mlx5_alloc_db_from_pgdir(struct mlx5_db_pgdir *pgdir,
169 	i = find_first_bit(pgdir->bitmap, db_per_page);
173 	__clear_bit(i, pgdir->bitmap);
175 	db->u.pgdir = pgdir;
178 	db->db      = pgdir->db_page + offset / sizeof(*pgdir->db_page);
179 	db->dma     = pgdir->db_dma  + offset;
189 	struct mlx5_db_pgdir *pgdir;
194 	list_for_each_entry(pgdir, &dev->priv.pgdir_list, list)
195 		if (!mlx5_alloc_db_from_pgdir(pgdir, db))
198 	pgdir = mlx5_alloc_db_pgdir(dev, node);
199 	if (!pgdir) {
204 	list_add(&pgdir->list, &dev->priv.pgdir_list);
207 	WARN_ON(mlx5_alloc_db_from_pgdir(pgdir, db));
222 	__set_bit(db->index, db->u.pgdir->bitmap);
224 	if (bitmap_full(db->u.pgdir->bitmap, db_per_page)) {
226 				  db->u.pgdir->db_page, db->u.pgdir->db_dma);
227 		list_del(&db->u.pgdir->list);
228 		bitmap_free(db->u.pgdir->bitmap);
229 		kfree(db->u.pgdir);