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1/*2 * Copyright © 2016 Intel Corporation3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice (including the next12 * paragraph) shall be included in all copies or substantial portions of the13 * Software.14 *15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS21 * IN THE SOFTWARE.22 *23 */24 25#ifndef __I915_SELFTESTS_RANDOM_H__26#define __I915_SELFTESTS_RANDOM_H__27 28#include <linux/math64.h>29#include <linux/random.h>30 31#include "../i915_selftest.h"32 33#define I915_RND_STATE_INITIALIZER(x) ({ \34 struct rnd_state state__; \35 prandom_seed_state(&state__, (x)); \36 state__; \37})38 39#define I915_RND_STATE(name__) \40 struct rnd_state name__ = I915_RND_STATE_INITIALIZER(i915_selftest.random_seed)41 42#define I915_RND_SUBSTATE(name__, parent__) \43 struct rnd_state name__ = I915_RND_STATE_INITIALIZER(prandom_u32_state(&(parent__)))44 45u64 i915_prandom_u64_state(struct rnd_state *rnd);46 47static inline u32 i915_prandom_u32_max_state(u32 ep_ro, struct rnd_state *state)48{49 return upper_32_bits(mul_u32_u32(prandom_u32_state(state), ep_ro));50}51 52unsigned int *i915_random_order(unsigned int count,53 struct rnd_state *state);54void i915_random_reorder(unsigned int *order,55 unsigned int count,56 struct rnd_state *state);57 58void i915_prandom_shuffle(void *arr, size_t elsz, size_t count,59 struct rnd_state *state);60 61u64 igt_random_offset(struct rnd_state *state,62 u64 start, u64 end,63 u64 len, u64 align);64 65#endif /* !__I915_SELFTESTS_RANDOM_H__ */66