1169691Skan/* 2169691Skan * Copyright �� 2016 Intel Corporation 3169691Skan * 4169691Skan * Permission is hereby granted, free of charge, to any person obtaining a 5169691Skan * copy of this software and associated documentation files (the "Software"), 6169691Skan * to deal in the Software without restriction, including without limitation 7169691Skan * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8169691Skan * and/or sell copies of the Software, and to permit persons to whom the 9169691Skan * Software is furnished to do so, subject to the following conditions: 10169691Skan * 11169691Skan * The above copyright notice and this permission notice (including the next 12169691Skan * paragraph) shall be included in all copies or substantial portions of the 13169691Skan * Software. 14169691Skan * 15169691Skan * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16169691Skan * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17169691Skan * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18169691Skan * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19169691Skan * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20169691Skan * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21169691Skan * IN THE SOFTWARE. 22169691Skan * 23169691Skan */ 24169691Skan 25169691Skan#ifndef __I915_SELFTESTS_RANDOM_H__ 26169691Skan#define __I915_SELFTESTS_RANDOM_H__ 27169691Skan 28169691Skan#include <linux/math64.h> 29169691Skan#include <linux/random.h> 30169691Skan 31169691Skan#include "../i915_selftest.h" 32169691Skan 33169691Skan#define I915_RND_STATE_INITIALIZER(x) ({ \ 34169691Skan struct rnd_state state__; \ 35169691Skan prandom_seed_state(&state__, (x)); \ 36169691Skan state__; \ 37169691Skan}) 38169691Skan 39169691Skan#define I915_RND_STATE(name__) \ 40169691Skan struct rnd_state name__ = I915_RND_STATE_INITIALIZER(i915_selftest.random_seed) 41169691Skan 42169691Skan#define I915_RND_SUBSTATE(name__, parent__) \ 43169691Skan struct rnd_state name__ = I915_RND_STATE_INITIALIZER(prandom_u32_state(&(parent__))) 44169691Skan 45169691Skanu64 i915_prandom_u64_state(struct rnd_state *rnd); 46169691Skan 47169691Skanstatic inline u32 i915_prandom_u32_max_state(u32 ep_ro, struct rnd_state *state) 48169691Skan{ 49169691Skan return upper_32_bits(mul_u32_u32(prandom_u32_state(state), ep_ro)); 50169691Skan} 51169691Skan 52169691Skanunsigned int *i915_random_order(unsigned int count, 53169691Skan struct rnd_state *state); 54169691Skanvoid i915_random_reorder(unsigned int *order, 55169691Skan unsigned int count, 56169691Skan struct rnd_state *state); 57169691Skan 58169691Skanvoid i915_prandom_shuffle(void *arr, size_t elsz, size_t count, 59169691Skan struct rnd_state *state); 60169691Skan 61169691Skanu64 igt_random_offset(struct rnd_state *state, 62169691Skan u64 start, u64 end, 63169691Skan u64 len, u64 align); 64169691Skan 65169691Skan#endif /* !__I915_SELFTESTS_RANDOM_H__ */ 66169691Skan