/* * Copyright © 2016 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * */ #ifndef __I915_SELFTESTS_RANDOM_H__ #define __I915_SELFTESTS_RANDOM_H__ #include <linux/math64.h> #include <linux/prandom.h> #include "../i915_selftest.h" #define I915_RND_STATE_INITIALIZER(x) ({ \ struct rnd_state state__; \ prandom_seed_state(&state__, (x)); \ state__; \ }) #define I915_RND_STATE(name__) \ struct rnd_state name__ = I915_RND_STATE_INITIALIZER(i915_selftest.random_seed) #define I915_RND_SUBSTATE(name__, parent__) \ struct rnd_state name__ = I915_RND_STATE_INITIALIZER(prandom_u32_state(&(parent__))) u64 i915_prandom_u64_state(struct rnd_state *rnd); static inline u32 i915_prandom_u32_max_state(u32 ep_ro, struct rnd_state *state) { return upper_32_bits(mul_u32_u32(prandom_u32_state(state), ep_ro)); } unsigned int *i915_random_order(unsigned int count, struct rnd_state *state); void i915_random_reorder(unsigned int *order, unsigned int count, struct rnd_state *state); void i915_prandom_shuffle(void *arr, size_t elsz, size_t count, struct rnd_state *state); u64 igt_random_offset(struct rnd_state *state, u64 start, u64 end, u64 len, u64 align); #endif /* !__I915_SELFTESTS_RANDOM_H__ */