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/*
* 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/random.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__ */
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