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1 | /*****************************************************************************\ |
2 | * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. | |
3 | * Copyright (C) 2007 The Regents of the University of California. | |
4 | * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). | |
5 | * Written by Brian Behlendorf <behlendorf1@llnl.gov>. | |
715f6251 | 6 | * UCRL-CODE-235197 |
7 | * | |
716154c5 BB |
8 | * This file is part of the SPL, Solaris Porting Layer. |
9 | * For details, see <http://github.com/behlendorf/spl/>. | |
10 | * | |
11 | * The SPL is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
715f6251 | 15 | * |
716154c5 | 16 | * The SPL is distributed in the hope that it will be useful, but WITHOUT |
715f6251 | 17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
19 | * for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License along | |
716154c5 BB |
22 | * with the SPL. If not, see <http://www.gnu.org/licenses/>. |
23 | ***************************************************************************** | |
24 | * Solaris Porting LAyer Tests (SPLAT) Atomic Tests. | |
25 | \*****************************************************************************/ | |
715f6251 | 26 | |
df870a69 BB |
27 | #include <sys/atomic.h> |
28 | #include <sys/thread.h> | |
9f4c835a | 29 | #include "splat-internal.h" |
30 | ||
9f4c835a | 31 | #define SPLAT_ATOMIC_NAME "atomic" |
32 | #define SPLAT_ATOMIC_DESC "Kernel Atomic Tests" | |
33 | ||
34 | #define SPLAT_ATOMIC_TEST1_ID 0x0b01 | |
35 | #define SPLAT_ATOMIC_TEST1_NAME "64-bit" | |
36 | #define SPLAT_ATOMIC_TEST1_DESC "Validate 64-bit atomic ops" | |
37 | ||
38 | #define SPLAT_ATOMIC_TEST_MAGIC 0x43435454UL | |
39 | #define SPLAT_ATOMIC_INIT_VALUE 10000000UL | |
40 | ||
41 | typedef enum { | |
42 | SPLAT_ATOMIC_INC_64 = 0, | |
43 | SPLAT_ATOMIC_DEC_64 = 1, | |
44 | SPLAT_ATOMIC_ADD_64 = 2, | |
45 | SPLAT_ATOMIC_SUB_64 = 3, | |
46 | SPLAT_ATOMIC_ADD_64_NV = 4, | |
47 | SPLAT_ATOMIC_SUB_64_NV = 5, | |
48 | SPLAT_ATOMIC_COUNT_64 = 6 | |
49 | } atomic_op_t; | |
50 | ||
51 | typedef struct atomic_priv { | |
52 | unsigned long ap_magic; | |
53 | struct file *ap_file; | |
54 | spinlock_t ap_lock; | |
55 | wait_queue_head_t ap_waitq; | |
56 | volatile uint64_t ap_atomic; | |
57 | volatile uint64_t ap_atomic_exited; | |
58 | atomic_op_t ap_op; | |
59 | ||
60 | } atomic_priv_t; | |
61 | ||
62 | static void | |
63 | splat_atomic_work(void *priv) | |
64 | { | |
65 | atomic_priv_t *ap; | |
66 | atomic_op_t op; | |
67 | int i; | |
68 | ||
69 | ap = (atomic_priv_t *)priv; | |
70 | ASSERT(ap->ap_magic == SPLAT_ATOMIC_TEST_MAGIC); | |
71 | ||
72 | spin_lock(&ap->ap_lock); | |
73 | op = ap->ap_op; | |
74 | wake_up(&ap->ap_waitq); | |
75 | spin_unlock(&ap->ap_lock); | |
76 | ||
77 | splat_vprint(ap->ap_file, SPLAT_ATOMIC_TEST1_NAME, | |
78 | "Thread %d successfully started: %lu/%lu\n", op, | |
79 | (long unsigned)ap->ap_atomic, | |
80 | (long unsigned)ap->ap_atomic_exited); | |
81 | ||
82 | for (i = 0; i < SPLAT_ATOMIC_INIT_VALUE / 10; i++) { | |
83 | ||
84 | /* Periodically sleep to mix up the ordering */ | |
85 | if ((i % (SPLAT_ATOMIC_INIT_VALUE / 100)) == 0) { | |
86 | splat_vprint(ap->ap_file, SPLAT_ATOMIC_TEST1_NAME, | |
87 | "Thread %d sleeping: %lu/%lu\n", op, | |
88 | (long unsigned)ap->ap_atomic, | |
89 | (long unsigned)ap->ap_atomic_exited); | |
90 | set_current_state(TASK_INTERRUPTIBLE); | |
91 | schedule_timeout(HZ / 100); | |
92 | } | |
93 | ||
94 | switch (op) { | |
95 | case SPLAT_ATOMIC_INC_64: | |
96 | atomic_inc_64(&ap->ap_atomic); | |
97 | break; | |
98 | case SPLAT_ATOMIC_DEC_64: | |
99 | atomic_dec_64(&ap->ap_atomic); | |
100 | break; | |
101 | case SPLAT_ATOMIC_ADD_64: | |
102 | atomic_add_64(&ap->ap_atomic, 3); | |
103 | break; | |
104 | case SPLAT_ATOMIC_SUB_64: | |
105 | atomic_sub_64(&ap->ap_atomic, 3); | |
106 | break; | |
107 | case SPLAT_ATOMIC_ADD_64_NV: | |
108 | atomic_add_64_nv(&ap->ap_atomic, 5); | |
109 | break; | |
110 | case SPLAT_ATOMIC_SUB_64_NV: | |
111 | atomic_sub_64_nv(&ap->ap_atomic, 5); | |
112 | break; | |
113 | default: | |
55abb092 | 114 | PANIC("Undefined op %d\n", op); |
9f4c835a | 115 | } |
116 | } | |
117 | ||
118 | atomic_inc_64(&ap->ap_atomic_exited); | |
119 | ||
120 | splat_vprint(ap->ap_file, SPLAT_ATOMIC_TEST1_NAME, | |
121 | "Thread %d successfully exited: %lu/%lu\n", op, | |
122 | (long unsigned)ap->ap_atomic, | |
123 | (long unsigned)ap->ap_atomic_exited); | |
124 | ||
9f4c835a | 125 | wake_up(&ap->ap_waitq); |
728b9dd8 | 126 | thread_exit(); |
9f4c835a | 127 | } |
128 | ||
129 | static int | |
55c59e61 | 130 | splat_atomic_test1_cond(atomic_priv_t *ap, int started) |
9f4c835a | 131 | { |
55c59e61 | 132 | return (ap->ap_atomic_exited == started); |
9f4c835a | 133 | } |
134 | ||
135 | static int | |
136 | splat_atomic_test1(struct file *file, void *arg) | |
137 | { | |
138 | atomic_priv_t ap; | |
139 | DEFINE_WAIT(wait); | |
140 | kthread_t *thr; | |
55c59e61 | 141 | int i, rc = 0; |
9f4c835a | 142 | |
143 | ap.ap_magic = SPLAT_ATOMIC_TEST_MAGIC; | |
144 | ap.ap_file = file; | |
145 | spin_lock_init(&ap.ap_lock); | |
146 | init_waitqueue_head(&ap.ap_waitq); | |
147 | ap.ap_atomic = SPLAT_ATOMIC_INIT_VALUE; | |
148 | ap.ap_atomic_exited = 0; | |
149 | ||
150 | for (i = 0; i < SPLAT_ATOMIC_COUNT_64; i++) { | |
151 | spin_lock(&ap.ap_lock); | |
152 | ap.ap_op = i; | |
153 | ||
154 | thr = (kthread_t *)thread_create(NULL, 0, splat_atomic_work, | |
155 | &ap, 0, &p0, TS_RUN, | |
156 | minclsyspri); | |
55c59e61 | 157 | if (thr == NULL) { |
158 | rc = -ESRCH; | |
159 | spin_unlock(&ap.ap_lock); | |
160 | break; | |
161 | } | |
9f4c835a | 162 | |
163 | /* Prepare to wait, the new thread will wake us once it | |
164 | * has made a copy of the unique private passed data */ | |
165 | prepare_to_wait(&ap.ap_waitq, &wait, TASK_UNINTERRUPTIBLE); | |
166 | spin_unlock(&ap.ap_lock); | |
167 | schedule(); | |
168 | } | |
169 | ||
8f813bb1 | 170 | wait_event(ap.ap_waitq, splat_atomic_test1_cond(&ap, i)); |
55c59e61 | 171 | |
172 | if (rc) { | |
173 | splat_vprint(file, SPLAT_ATOMIC_TEST1_NAME, "Only started " | |
174 | "%d/%d test threads\n", i, SPLAT_ATOMIC_COUNT_64); | |
175 | return rc; | |
176 | } | |
9f4c835a | 177 | |
178 | if (ap.ap_atomic != SPLAT_ATOMIC_INIT_VALUE) { | |
179 | splat_vprint(file, SPLAT_ATOMIC_TEST1_NAME, | |
180 | "Final value %lu does not match initial value %lu\n", | |
181 | (long unsigned)ap.ap_atomic, SPLAT_ATOMIC_INIT_VALUE); | |
182 | return -EINVAL; | |
183 | } | |
184 | ||
185 | splat_vprint(file, SPLAT_ATOMIC_TEST1_NAME, | |
186 | "Success initial and final values match, %lu == %lu\n", | |
187 | (long unsigned)ap.ap_atomic, SPLAT_ATOMIC_INIT_VALUE); | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | splat_subsystem_t * | |
193 | splat_atomic_init(void) | |
194 | { | |
195 | splat_subsystem_t *sub; | |
196 | ||
197 | sub = kmalloc(sizeof(*sub), GFP_KERNEL); | |
198 | if (sub == NULL) | |
199 | return NULL; | |
200 | ||
201 | memset(sub, 0, sizeof(*sub)); | |
202 | strncpy(sub->desc.name, SPLAT_ATOMIC_NAME, SPLAT_NAME_SIZE); | |
203 | strncpy(sub->desc.desc, SPLAT_ATOMIC_DESC, SPLAT_DESC_SIZE); | |
204 | INIT_LIST_HEAD(&sub->subsystem_list); | |
205 | INIT_LIST_HEAD(&sub->test_list); | |
206 | spin_lock_init(&sub->test_lock); | |
207 | sub->desc.id = SPLAT_SUBSYSTEM_ATOMIC; | |
208 | ||
209 | SPLAT_TEST_INIT(sub, SPLAT_ATOMIC_TEST1_NAME, SPLAT_ATOMIC_TEST1_DESC, | |
210 | SPLAT_ATOMIC_TEST1_ID, splat_atomic_test1); | |
211 | ||
212 | return sub; | |
213 | } | |
214 | ||
215 | void | |
216 | splat_atomic_fini(splat_subsystem_t *sub) | |
217 | { | |
218 | ASSERT(sub); | |
219 | SPLAT_TEST_FINI(sub, SPLAT_ATOMIC_TEST1_ID); | |
220 | ||
221 | kfree(sub); | |
222 | } | |
223 | ||
224 | int | |
225 | splat_atomic_id(void) { | |
226 | return SPLAT_SUBSYSTEM_ATOMIC; | |
227 | } |