1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright © 2016 Intel Corporation
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Permission is hereby granted, free of charge, to any person obtaining a
5*4882a593Smuzhiyun * copy of this software and associated documentation files (the "Software"),
6*4882a593Smuzhiyun * to deal in the Software without restriction, including without limitation
7*4882a593Smuzhiyun * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8*4882a593Smuzhiyun * and/or sell copies of the Software, and to permit persons to whom the
9*4882a593Smuzhiyun * Software is furnished to do so, subject to the following conditions:
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * The above copyright notice and this permission notice (including the next
12*4882a593Smuzhiyun * paragraph) shall be included in all copies or substantial portions of the
13*4882a593Smuzhiyun * Software.
14*4882a593Smuzhiyun *
15*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16*4882a593Smuzhiyun * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17*4882a593Smuzhiyun * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18*4882a593Smuzhiyun * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19*4882a593Smuzhiyun * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20*4882a593Smuzhiyun * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21*4882a593Smuzhiyun * IN THE SOFTWARE.
22*4882a593Smuzhiyun *
23*4882a593Smuzhiyun */
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun #ifndef __I915_SELFTESTS_RANDOM_H__
26*4882a593Smuzhiyun #define __I915_SELFTESTS_RANDOM_H__
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun #include <linux/math64.h>
29*4882a593Smuzhiyun #include <linux/random.h>
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun #include "../i915_selftest.h"
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun #define I915_RND_STATE_INITIALIZER(x) ({ \
34*4882a593Smuzhiyun struct rnd_state state__; \
35*4882a593Smuzhiyun prandom_seed_state(&state__, (x)); \
36*4882a593Smuzhiyun state__; \
37*4882a593Smuzhiyun })
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun #define I915_RND_STATE(name__) \
40*4882a593Smuzhiyun struct rnd_state name__ = I915_RND_STATE_INITIALIZER(i915_selftest.random_seed)
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun #define I915_RND_SUBSTATE(name__, parent__) \
43*4882a593Smuzhiyun struct rnd_state name__ = I915_RND_STATE_INITIALIZER(prandom_u32_state(&(parent__)))
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun u64 i915_prandom_u64_state(struct rnd_state *rnd);
46*4882a593Smuzhiyun
i915_prandom_u32_max_state(u32 ep_ro,struct rnd_state * state)47*4882a593Smuzhiyun static inline u32 i915_prandom_u32_max_state(u32 ep_ro, struct rnd_state *state)
48*4882a593Smuzhiyun {
49*4882a593Smuzhiyun return upper_32_bits(mul_u32_u32(prandom_u32_state(state), ep_ro));
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun unsigned int *i915_random_order(unsigned int count,
53*4882a593Smuzhiyun struct rnd_state *state);
54*4882a593Smuzhiyun void i915_random_reorder(unsigned int *order,
55*4882a593Smuzhiyun unsigned int count,
56*4882a593Smuzhiyun struct rnd_state *state);
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun void i915_prandom_shuffle(void *arr, size_t elsz, size_t count,
59*4882a593Smuzhiyun struct rnd_state *state);
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun u64 igt_random_offset(struct rnd_state *state,
62*4882a593Smuzhiyun u64 start, u64 end,
63*4882a593Smuzhiyun u64 len, u64 align);
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun #endif /* !__I915_SELFTESTS_RANDOM_H__ */
66