162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci#ifndef __DRM_RANDOM_H__ 362306a36Sopenharmony_ci#define __DRM_RANDOM_H__ 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci/* This is a temporary home for a couple of utility functions that should 662306a36Sopenharmony_ci * be transposed to lib/ at the earliest convenience. 762306a36Sopenharmony_ci */ 862306a36Sopenharmony_ci 962306a36Sopenharmony_ci#include <linux/random.h> 1062306a36Sopenharmony_ci 1162306a36Sopenharmony_ci#define DRM_RND_STATE_INITIALIZER(seed__) ({ \ 1262306a36Sopenharmony_ci struct rnd_state state__; \ 1362306a36Sopenharmony_ci prandom_seed_state(&state__, (seed__)); \ 1462306a36Sopenharmony_ci state__; \ 1562306a36Sopenharmony_ci}) 1662306a36Sopenharmony_ci 1762306a36Sopenharmony_ci#define DRM_RND_STATE(name__, seed__) \ 1862306a36Sopenharmony_ci struct rnd_state name__ = DRM_RND_STATE_INITIALIZER(seed__) 1962306a36Sopenharmony_ci 2062306a36Sopenharmony_ciunsigned int *drm_random_order(unsigned int count, 2162306a36Sopenharmony_ci struct rnd_state *state); 2262306a36Sopenharmony_civoid drm_random_reorder(unsigned int *order, 2362306a36Sopenharmony_ci unsigned int count, 2462306a36Sopenharmony_ci struct rnd_state *state); 2562306a36Sopenharmony_ciu32 drm_prandom_u32_max_state(u32 ep_ro, 2662306a36Sopenharmony_ci struct rnd_state *state); 2762306a36Sopenharmony_ci 2862306a36Sopenharmony_ci#endif /* !__DRM_RANDOM_H__ */ 29