diff --git a/drv_helpers.h b/drv_helpers.h
new file mode 100644
index 0000000..2913fb3
--- /dev/null
+++ b/drv_helpers.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2014 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef DRV_HELPERS_H
+#define DRV_HELPERS_H
+
+#include <stdbool.h>
+
+#include "drv.h"
+#include "drv_array_helpers.h"
+
+#ifndef PAGE_SIZE
+#define PAGE_SIZE 0x1000
+#endif
+
+struct format_metadata;
+
+uint32_t drv_height_from_format(uint32_t format, uint32_t height, size_t plane);
+uint32_t drv_vertical_subsampling_from_format(uint32_t format, size_t plane);
+uint32_t drv_size_from_format(uint32_t format, uint32_t stride, uint32_t height, size_t plane);
+int drv_bo_from_format(struct bo *bo, uint32_t stride, uint32_t aligned_height, uint32_t format);
+int drv_bo_from_format_and_padding(struct bo *bo, uint32_t stride, uint32_t aligned_height,
+				   uint32_t format, uint32_t padding[DRV_MAX_PLANES]);
+int drv_dumb_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
+		       uint64_t use_flags);
+int drv_dumb_bo_create_ex(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
+			  uint64_t use_flags, uint64_t quirks);
+int drv_dumb_bo_destroy(struct bo *bo);
+int drv_gem_bo_destroy(struct bo *bo);
+int drv_prime_bo_import(struct bo *bo, struct drv_import_fd_data *data);
+void *drv_dumb_bo_map(struct bo *bo, struct vma *vma, size_t plane, uint32_t map_flags);
+int drv_bo_munmap(struct bo *bo, struct vma *vma);
+int drv_get_prot(uint32_t map_flags);
+void drv_add_combination(struct driver *drv, uint32_t format, struct format_metadata *metadata,
+			 uint64_t usage);
+void drv_add_combinations(struct driver *drv, const uint32_t *formats, uint32_t num_formats,
+			  struct format_metadata *metadata, uint64_t usage);
+void drv_modify_combination(struct driver *drv, uint32_t format, struct format_metadata *metadata,
+			    uint64_t usage);
+int drv_modify_linear_combinations(struct driver *drv);
+uint64_t drv_pick_modifier(const uint64_t *modifiers, uint32_t count,
+			   const uint64_t *modifier_order, uint32_t order_count);
+bool drv_has_modifier(const uint64_t *list, uint32_t count, uint64_t modifier);
+uint32_t drv_resolve_format_helper(uint32_t format, uint64_t use_flags);
+uint64_t drv_resolve_use_flags_helper(struct driver *drv, uint32_t format, uint64_t use_flags);
+
+#endif