1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __DRM_RANDOM_H__
 3#define __DRM_RANDOM_H__
 4
 5/* This is a temporary home for a couple of utility functions that should
 6 * be transposed to lib/ at the earliest convenience.
 7 */
 8
 9#include <linux/random.h>
10
11#define DRM_RND_STATE_INITIALIZER(seed__) ({				\
12	struct rnd_state state__;					\
13	prandom_seed_state(&state__, (seed__));				\
14	state__;							\
15})
16
17#define DRM_RND_STATE(name__, seed__) \
18	struct rnd_state name__ = DRM_RND_STATE_INITIALIZER(seed__)
19
20unsigned int *drm_random_order(unsigned int count,
21			       struct rnd_state *state);
22void drm_random_reorder(unsigned int *order,
23			unsigned int count,
24			struct rnd_state *state);
25u32 drm_prandom_u32_max_state(u32 ep_ro,
26			      struct rnd_state *state);
27
28#endif /* !__DRM_RANDOM_H__ */