[mirror_ubuntu-artful-kernel.git] / lib / atomic64_test.c

/*
 * Testsuite for atomic64_t functions
 *
 * Copyright © 2010  Luca Barbieri
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/init.h>
#include <linux/bug.h>
#include <linux/kernel.h>
#include <linux/atomic.h>
#include <linux/module.h>

#ifdef CONFIG_X86
#include <asm/cpufeature.h>	/* for boot_cpu_has below */
#endif

#define TEST(bit, op, c_op, val)				\
do {								\
	atomic##bit##_set(&v, v0);				\
	r = v0;							\
	atomic##bit##_##op(val, &v);				\
	r c_op val;						\
	WARN(atomic##bit##_read(&v) != r, "%Lx != %Lx\n",	\
		(unsigned long long)atomic##bit##_read(&v),	\
		(unsigned long long)r);				\
} while (0)

/*
 * Test for a atomic operation family,
 * @test should be a macro accepting parameters (bit, op, ...)
 */

#define FAMILY_TEST(test, bit, op, args...)	\
do {						\
	test(bit, op, ##args);		\
	test(bit, op##_acquire, ##args);	\
	test(bit, op##_release, ##args);	\
	test(bit, op##_relaxed, ##args);	\
} while (0)

#define TEST_RETURN(bit, op, c_op, val)				\
do {								\
	atomic##bit##_set(&v, v0);				\
	r = v0;							\
	r c_op val;						\
	BUG_ON(atomic##bit##_##op(val, &v) != r);		\
	BUG_ON(atomic##bit##_read(&v) != r);			\
} while (0)

#define TEST_FETCH(bit, op, c_op, val)				\
do {								\
	atomic##bit##_set(&v, v0);				\
	r = v0;							\
	r c_op val;						\
	BUG_ON(atomic##bit##_##op(val, &v) != v0);		\
	BUG_ON(atomic##bit##_read(&v) != r);			\
} while (0)

#define RETURN_FAMILY_TEST(bit, op, c_op, val)			\
do {								\
	FAMILY_TEST(TEST_RETURN, bit, op, c_op, val);		\
} while (0)

#define FETCH_FAMILY_TEST(bit, op, c_op, val)			\
do {								\
	FAMILY_TEST(TEST_FETCH, bit, op, c_op, val);		\
} while (0)

#define TEST_ARGS(bit, op, init, ret, expect, args...)		\
do {								\
	atomic##bit##_set(&v, init);				\
	BUG_ON(atomic##bit##_##op(&v, ##args) != ret);		\
	BUG_ON(atomic##bit##_read(&v) != expect);		\
} while (0)

#define XCHG_FAMILY_TEST(bit, init, new)				\
do {									\
	FAMILY_TEST(TEST_ARGS, bit, xchg, init, init, new, new);	\
} while (0)

#define CMPXCHG_FAMILY_TEST(bit, init, new, wrong)			\
do {									\
	FAMILY_TEST(TEST_ARGS, bit, cmpxchg, 				\
			init, init, new, init, new);			\
	FAMILY_TEST(TEST_ARGS, bit, cmpxchg,				\
			init, init, init, wrong, new);			\
} while (0)

#define INC_RETURN_FAMILY_TEST(bit, i)			\
do {							\
	FAMILY_TEST(TEST_ARGS, bit, inc_return,		\
			i, (i) + one, (i) + one);	\
} while (0)

#define DEC_RETURN_FAMILY_TEST(bit, i)			\
do {							\
	FAMILY_TEST(TEST_ARGS, bit, dec_return,		\
			i, (i) - one, (i) - one);	\
} while (0)

static __init void test_atomic(void)
{
	int v0 = 0xaaa31337;
	int v1 = 0xdeadbeef;
	int onestwos = 0x11112222;
	int one = 1;

	atomic_t v;
	int r;

	TEST(, add, +=, onestwos);
	TEST(, add, +=, -one);
	TEST(, sub, -=, onestwos);
	TEST(, sub, -=, -one);
	TEST(, or, |=, v1);
	TEST(, and, &=, v1);
	TEST(, xor, ^=, v1);
	TEST(, andnot, &= ~, v1);

	RETURN_FAMILY_TEST(, add_return, +=, onestwos);
	RETURN_FAMILY_TEST(, add_return, +=, -one);
	RETURN_FAMILY_TEST(, sub_return, -=, onestwos);
	RETURN_FAMILY_TEST(, sub_return, -=, -one);

	FETCH_FAMILY_TEST(, fetch_add, +=, onestwos);
	FETCH_FAMILY_TEST(, fetch_add, +=, -one);
	FETCH_FAMILY_TEST(, fetch_sub, -=, onestwos);
	FETCH_FAMILY_TEST(, fetch_sub, -=, -one);

	FETCH_FAMILY_TEST(, fetch_or,  |=, v1);
	FETCH_FAMILY_TEST(, fetch_and, &=, v1);
	FETCH_FAMILY_TEST(, fetch_andnot, &= ~, v1);
	FETCH_FAMILY_TEST(, fetch_xor, ^=, v1);

	INC_RETURN_FAMILY_TEST(, v0);
	DEC_RETURN_FAMILY_TEST(, v0);

	XCHG_FAMILY_TEST(, v0, v1);
	CMPXCHG_FAMILY_TEST(, v0, v1, onestwos);

}

#define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
static __init void test_atomic64(void)
{
	long long v0 = 0xaaa31337c001d00dLL;
	long long v1 = 0xdeadbeefdeafcafeLL;
	long long v2 = 0xfaceabadf00df001LL;
	long long v3 = 0x8000000000000000LL;
	long long onestwos = 0x1111111122222222LL;
	long long one = 1LL;
	int r_int;

	atomic64_t v = ATOMIC64_INIT(v0);
	long long r = v0;
	BUG_ON(v.counter != r);

	atomic64_set(&v, v1);
	r = v1;
	BUG_ON(v.counter != r);
	BUG_ON(atomic64_read(&v) != r);

	TEST(64, add, +=, onestwos);
	TEST(64, add, +=, -one);
	TEST(64, sub, -=, onestwos);
	TEST(64, sub, -=, -one);
	TEST(64, or, |=, v1);
	TEST(64, and, &=, v1);
	TEST(64, xor, ^=, v1);
	TEST(64, andnot, &= ~, v1);

	RETURN_FAMILY_TEST(64, add_return, +=, onestwos);
	RETURN_FAMILY_TEST(64, add_return, +=, -one);
	RETURN_FAMILY_TEST(64, sub_return, -=, onestwos);
	RETURN_FAMILY_TEST(64, sub_return, -=, -one);

	FETCH_FAMILY_TEST(64, fetch_add, +=, onestwos);
	FETCH_FAMILY_TEST(64, fetch_add, +=, -one);
	FETCH_FAMILY_TEST(64, fetch_sub, -=, onestwos);
	FETCH_FAMILY_TEST(64, fetch_sub, -=, -one);

	FETCH_FAMILY_TEST(64, fetch_or,  |=, v1);
	FETCH_FAMILY_TEST(64, fetch_and, &=, v1);
	FETCH_FAMILY_TEST(64, fetch_andnot, &= ~, v1);
	FETCH_FAMILY_TEST(64, fetch_xor, ^=, v1);

	INIT(v0);
	atomic64_inc(&v);
	r += one;
	BUG_ON(v.counter != r);

	INIT(v0);
	atomic64_dec(&v);
	r -= one;
	BUG_ON(v.counter != r);

	INC_RETURN_FAMILY_TEST(64, v0);
	DEC_RETURN_FAMILY_TEST(64, v0);

	XCHG_FAMILY_TEST(64, v0, v1);
	CMPXCHG_FAMILY_TEST(64, v0, v1, v2);

	INIT(v0);
	BUG_ON(atomic64_add_unless(&v, one, v0));
	BUG_ON(v.counter != r);

	INIT(v0);
	BUG_ON(!atomic64_add_unless(&v, one, v1));
	r += one;
	BUG_ON(v.counter != r);

	INIT(onestwos);
	BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
	r -= one;
	BUG_ON(v.counter != r);

	INIT(0);
	BUG_ON(atomic64_dec_if_positive(&v) != -one);
	BUG_ON(v.counter != r);

	INIT(-one);
	BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
	BUG_ON(v.counter != r);

	INIT(onestwos);
	BUG_ON(!atomic64_inc_not_zero(&v));
	r += one;
	BUG_ON(v.counter != r);

	INIT(0);
	BUG_ON(atomic64_inc_not_zero(&v));
	BUG_ON(v.counter != r);

	INIT(-one);
	BUG_ON(!atomic64_inc_not_zero(&v));
	r += one;
	BUG_ON(v.counter != r);

	/* Confirm the return value fits in an int, even if the value doesn't */
	INIT(v3);
	r_int = atomic64_inc_not_zero(&v);
	BUG_ON(!r_int);
}

static __init int test_atomics_init(void)
{
	test_atomic();
	test_atomic64();

#ifdef CONFIG_X86
	pr_info("passed for %s platform %s CX8 and %s SSE\n",
#ifdef CONFIG_X86_64
		"x86-64",
#elif defined(CONFIG_X86_CMPXCHG64)
		"i586+",
#else
		"i386+",
#endif
	       boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without",
	       boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without");
#else
	pr_info("passed\n");
#endif

	return 0;
}

static __exit void test_atomics_exit(void) {}

module_init(test_atomics_init);
module_exit(test_atomics_exit);

MODULE_LICENSE("GPL");
Commit	Line	Data
86a89380 LB	1	/*
	2	* Testsuite for atomic64_t functions
	3	*
	4	* Copyright © 2010 Luca Barbieri
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*/
b3b16d28 FF	11
	12	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	13
86a89380	14	#include <linux/init.h>
50af5ead	15	#include <linux/bug.h>
0dbdd1bf	16	#include <linux/kernel.h>
60063497	17	#include <linux/atomic.h>
55ded955	18	#include <linux/module.h>
86a89380	19
153a4334	20	#ifdef CONFIG_X86
cd4d09ec	21	#include <asm/cpufeature.h> /* for boot_cpu_has below */
153a4334 AK	22	#endif
153a4334 AK	23
41b9e9fc PZ	24	#define TEST(bit, op, c_op, val) \
	25	do { \
	26	atomic##bit##_set(&v, v0); \
	27	r = v0; \
	28	atomic##bit##_##op(val, &v); \
	29	r c_op val; \
	30	WARN(atomic##bit##_read(&v) != r, "%Lx != %Lx\n", \
	31	(unsigned long long)atomic##bit##_read(&v), \
	32	(unsigned long long)r); \
	33	} while (0)
	34
978e5a36 BF	35	/*
	36	* Test for a atomic operation family,
	37	* @test should be a macro accepting parameters (bit, op, ...)
	38	*/
	39
	40	#define FAMILY_TEST(test, bit, op, args...) \
	41	do { \
	42	test(bit, op, ##args); \
	43	test(bit, op##_acquire, ##args); \
	44	test(bit, op##_release, ##args); \
	45	test(bit, op##_relaxed, ##args); \
	46	} while (0)
	47
	48	#define TEST_RETURN(bit, op, c_op, val) \
	49	do { \
	50	atomic##bit##_set(&v, v0); \
	51	r = v0; \
	52	r c_op val; \
	53	BUG_ON(atomic##bit##_##op(val, &v) != r); \
	54	BUG_ON(atomic##bit##_read(&v) != r); \
	55	} while (0)
	56
28aa2bda PZ	57	#define TEST_FETCH(bit, op, c_op, val) \
	58	do { \
	59	atomic##bit##_set(&v, v0); \
	60	r = v0; \
	61	r c_op val; \
	62	BUG_ON(atomic##bit##_##op(val, &v) != v0); \
	63	BUG_ON(atomic##bit##_read(&v) != r); \
	64	} while (0)
	65
978e5a36 BF	66	#define RETURN_FAMILY_TEST(bit, op, c_op, val) \
	67	do { \
	68	FAMILY_TEST(TEST_RETURN, bit, op, c_op, val); \
	69	} while (0)
	70
28aa2bda PZ	71	#define FETCH_FAMILY_TEST(bit, op, c_op, val) \
	72	do { \
	73	FAMILY_TEST(TEST_FETCH, bit, op, c_op, val); \
	74	} while (0)
	75
978e5a36 BF	76	#define TEST_ARGS(bit, op, init, ret, expect, args...) \
	77	do { \
	78	atomic##bit##_set(&v, init); \
	79	BUG_ON(atomic##bit##_##op(&v, ##args) != ret); \
	80	BUG_ON(atomic##bit##_read(&v) != expect); \
	81	} while (0)
	82
	83	#define XCHG_FAMILY_TEST(bit, init, new) \
	84	do { \
	85	FAMILY_TEST(TEST_ARGS, bit, xchg, init, init, new, new); \
	86	} while (0)
	87
	88	#define CMPXCHG_FAMILY_TEST(bit, init, new, wrong) \
	89	do { \
	90	FAMILY_TEST(TEST_ARGS, bit, cmpxchg, \
	91	init, init, new, init, new); \
	92	FAMILY_TEST(TEST_ARGS, bit, cmpxchg, \
	93	init, init, init, wrong, new); \
	94	} while (0)
	95
	96	#define INC_RETURN_FAMILY_TEST(bit, i) \
	97	do { \
	98	FAMILY_TEST(TEST_ARGS, bit, inc_return, \
	99	i, (i) + one, (i) + one); \
	100	} while (0)
	101
	102	#define DEC_RETURN_FAMILY_TEST(bit, i) \
	103	do { \
	104	FAMILY_TEST(TEST_ARGS, bit, dec_return, \
	105	i, (i) - one, (i) - one); \
	106	} while (0)
	107
41b9e9fc PZ	108	static __init void test_atomic(void)
	109	{
	110	int v0 = 0xaaa31337;
	111	int v1 = 0xdeadbeef;
	112	int onestwos = 0x11112222;
	113	int one = 1;
	114
	115	atomic_t v;
	116	int r;
	117
	118	TEST(, add, +=, onestwos);
	119	TEST(, add, +=, -one);
	120	TEST(, sub, -=, onestwos);
	121	TEST(, sub, -=, -one);
	122	TEST(, or, \|=, v1);
	123	TEST(, and, &=, v1);
	124	TEST(, xor, ^=, v1);
	125	TEST(, andnot, &= ~, v1);
978e5a36 BF	126
	127	RETURN_FAMILY_TEST(, add_return, +=, onestwos);
	128	RETURN_FAMILY_TEST(, add_return, +=, -one);
	129	RETURN_FAMILY_TEST(, sub_return, -=, onestwos);
	130	RETURN_FAMILY_TEST(, sub_return, -=, -one);
	131
28aa2bda PZ	132	FETCH_FAMILY_TEST(, fetch_add, +=, onestwos);
	133	FETCH_FAMILY_TEST(, fetch_add, +=, -one);
	134	FETCH_FAMILY_TEST(, fetch_sub, -=, onestwos);
	135	FETCH_FAMILY_TEST(, fetch_sub, -=, -one);
	136
	137	FETCH_FAMILY_TEST(, fetch_or, \|=, v1);
	138	FETCH_FAMILY_TEST(, fetch_and, &=, v1);
	139	FETCH_FAMILY_TEST(, fetch_andnot, &= ~, v1);
	140	FETCH_FAMILY_TEST(, fetch_xor, ^=, v1);
	141
978e5a36 BF	142	INC_RETURN_FAMILY_TEST(, v0);
	143	DEC_RETURN_FAMILY_TEST(, v0);
	144
	145	XCHG_FAMILY_TEST(, v0, v1);
	146	CMPXCHG_FAMILY_TEST(, v0, v1, onestwos);
	147
41b9e9fc PZ	148	}
41b9e9fc PZ	149
86a89380	150	#define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
41b9e9fc	151	static __init void test_atomic64(void)
86a89380 LB	152	{
	153	long long v0 = 0xaaa31337c001d00dLL;
	154	long long v1 = 0xdeadbeefdeafcafeLL;
	155	long long v2 = 0xfaceabadf00df001LL;
ffba19cc	156	long long v3 = 0x8000000000000000LL;
86a89380 LB	157	long long onestwos = 0x1111111122222222LL;
86a89380 LB	158	long long one = 1LL;
ffba19cc	159	int r_int;
86a89380 LB	160
	161	atomic64_t v = ATOMIC64_INIT(v0);
	162	long long r = v0;
	163	BUG_ON(v.counter != r);
	164
	165	atomic64_set(&v, v1);
	166	r = v1;
	167	BUG_ON(v.counter != r);
	168	BUG_ON(atomic64_read(&v) != r);
	169
41b9e9fc PZ	170	TEST(64, add, +=, onestwos);
	171	TEST(64, add, +=, -one);
	172	TEST(64, sub, -=, onestwos);
	173	TEST(64, sub, -=, -one);
	174	TEST(64, or, \|=, v1);
	175	TEST(64, and, &=, v1);
	176	TEST(64, xor, ^=, v1);
	177	TEST(64, andnot, &= ~, v1);
86a89380	178
978e5a36 BF	179	RETURN_FAMILY_TEST(64, add_return, +=, onestwos);
	180	RETURN_FAMILY_TEST(64, add_return, +=, -one);
	181	RETURN_FAMILY_TEST(64, sub_return, -=, onestwos);
	182	RETURN_FAMILY_TEST(64, sub_return, -=, -one);
86a89380	183
28aa2bda PZ	184	FETCH_FAMILY_TEST(64, fetch_add, +=, onestwos);
	185	FETCH_FAMILY_TEST(64, fetch_add, +=, -one);
	186	FETCH_FAMILY_TEST(64, fetch_sub, -=, onestwos);
	187	FETCH_FAMILY_TEST(64, fetch_sub, -=, -one);
	188
	189	FETCH_FAMILY_TEST(64, fetch_or, \|=, v1);
	190	FETCH_FAMILY_TEST(64, fetch_and, &=, v1);
	191	FETCH_FAMILY_TEST(64, fetch_andnot, &= ~, v1);
	192	FETCH_FAMILY_TEST(64, fetch_xor, ^=, v1);
	193
86a89380 LB	194	INIT(v0);
	195	atomic64_inc(&v);
	196	r += one;
	197	BUG_ON(v.counter != r);
	198
86a89380 LB	199	INIT(v0);
	200	atomic64_dec(&v);
	201	r -= one;
	202	BUG_ON(v.counter != r);
	203
978e5a36 BF	204	INC_RETURN_FAMILY_TEST(64, v0);
978e5a36 BF	205	DEC_RETURN_FAMILY_TEST(64, v0);
86a89380	206
978e5a36 BF	207	XCHG_FAMILY_TEST(64, v0, v1);
978e5a36 BF	208	CMPXCHG_FAMILY_TEST(64, v0, v1, v2);
86a89380 LB	209
86a89380 LB	210	INIT(v0);
9efbcd59	211	BUG_ON(atomic64_add_unless(&v, one, v0));
86a89380 LB	212	BUG_ON(v.counter != r);
	213
	214	INIT(v0);
9efbcd59	215	BUG_ON(!atomic64_add_unless(&v, one, v1));
86a89380 LB	216	r += one;
	217	BUG_ON(v.counter != r);
	218
	219	INIT(onestwos);
	220	BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
	221	r -= one;
	222	BUG_ON(v.counter != r);
	223
	224	INIT(0);
	225	BUG_ON(atomic64_dec_if_positive(&v) != -one);
	226	BUG_ON(v.counter != r);
	227
	228	INIT(-one);
	229	BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
	230	BUG_ON(v.counter != r);
	231
	232	INIT(onestwos);
25a304f2	233	BUG_ON(!atomic64_inc_not_zero(&v));
86a89380 LB	234	r += one;
	235	BUG_ON(v.counter != r);
	236
	237	INIT(0);
25a304f2	238	BUG_ON(atomic64_inc_not_zero(&v));
86a89380 LB	239	BUG_ON(v.counter != r);
	240
	241	INIT(-one);
25a304f2	242	BUG_ON(!atomic64_inc_not_zero(&v));
86a89380 LB	243	r += one;
86a89380 LB	244	BUG_ON(v.counter != r);
ffba19cc ME	245
	246	/* Confirm the return value fits in an int, even if the value doesn't */
	247	INIT(v3);
	248	r_int = atomic64_inc_not_zero(&v);
	249	BUG_ON(!r_int);
41b9e9fc PZ	250	}
41b9e9fc PZ	251
55ded955	252	static __init int test_atomics_init(void)
41b9e9fc PZ	253	{
	254	test_atomic();
	255	test_atomic64();
86a89380 LB	256
86a89380 LB	257	#ifdef CONFIG_X86
b3b16d28	258	pr_info("passed for %s platform %s CX8 and %s SSE\n",
a5c9161f	259	#ifdef CONFIG_X86_64
b3b16d28	260	"x86-64",
a5c9161f	261	#elif defined(CONFIG_X86_CMPXCHG64)
b3b16d28	262	"i586+",
86a89380	263	#else
b3b16d28	264	"i386+",
86a89380	265	#endif
a5c9161f PA	266	boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without",
a5c9161f PA	267	boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without");
86a89380	268	#else
b3b16d28	269	pr_info("passed\n");
86a89380 LB	270	#endif
	271
	272	return 0;
	273	}
	274
55ded955 GU	275	static __exit void test_atomics_exit(void) {}
	276
	277	module_init(test_atomics_init);
	278	module_exit(test_atomics_exit);
	279
	280	MODULE_LICENSE("GPL");