1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2a33d42ddSChris Wilson #ifndef __DRM_RANDOM_H__ 3a33d42ddSChris Wilson #define __DRM_RANDOM_H__ 4a33d42ddSChris Wilson 5a33d42ddSChris Wilson /* This is a temporary home for a couple of utility functions that should 6a33d42ddSChris Wilson * be transposed to lib/ at the earliest convenience. 7a33d42ddSChris Wilson */ 8a33d42ddSChris Wilson 9a33d42ddSChris Wilson #include <linux/random.h> 10a33d42ddSChris Wilson 11a33d42ddSChris Wilson #define DRM_RND_STATE_INITIALIZER(seed__) ({ \ 12a33d42ddSChris Wilson struct rnd_state state__; \ 13a33d42ddSChris Wilson prandom_seed_state(&state__, (seed__)); \ 14a33d42ddSChris Wilson state__; \ 15a33d42ddSChris Wilson }) 16a33d42ddSChris Wilson 17a33d42ddSChris Wilson #define DRM_RND_STATE(name__, seed__) \ 18a33d42ddSChris Wilson struct rnd_state name__ = DRM_RND_STATE_INITIALIZER(seed__) 19a33d42ddSChris Wilson 20a33d42ddSChris Wilson unsigned int *drm_random_order(unsigned int count, 21a33d42ddSChris Wilson struct rnd_state *state); 22a33d42ddSChris Wilson void drm_random_reorder(unsigned int *order, 23a33d42ddSChris Wilson unsigned int count, 24a33d42ddSChris Wilson struct rnd_state *state); 25*92937f17SArunpravin u32 drm_prandom_u32_max_state(u32 ep_ro, 26*92937f17SArunpravin struct rnd_state *state); 27a33d42ddSChris Wilson 28a33d42ddSChris Wilson #endif /* !__DRM_RANDOM_H__ */ 29