1 | /* |
2 | * Copyright © 2016 Intel Corporation |
3 | * |
4 | * Permission is hereby granted, free of charge, to any person obtaining a |
5 | * copy of this software and associated documentation files (the "Software"), |
6 | * to deal in the Software without restriction, including without limitation |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
8 | * and/or sell copies of the Software, and to permit persons to whom the |
9 | * Software is furnished to do so, subject to the following conditions: |
10 | * |
11 | * The above copyright notice and this permission notice (including the next |
12 | * paragraph) shall be included in all copies or substantial portions of the |
13 | * Software. |
14 | * |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
21 | * 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 | |
45 | u64 i915_prandom_u64_state(struct rnd_state *rnd); |
46 | |
47 | static 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 | |
52 | unsigned int *i915_random_order(unsigned int count, |
53 | struct rnd_state *state); |
54 | void i915_random_reorder(unsigned int *order, |
55 | unsigned int count, |
56 | struct rnd_state *state); |
57 | |
58 | void i915_prandom_shuffle(void *arr, size_t elsz, size_t count, |
59 | struct rnd_state *state); |
60 | |
61 | u64 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 | |