1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (C) 2012-2013 Intel Corporation
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: stable/12/sys/dev/nvme/nvme_test.c 361030 2020-05-14 12:52:08Z dab $");
31
32 #include <sys/param.h>
33 #include <sys/bio.h>
34 #include <sys/conf.h>
35 #include <sys/fcntl.h>
36 #include <sys/kthread.h>
37 #include <sys/module.h>
38 #include <sys/proc.h>
39 #include <sys/syscallsubr.h>
40 #include <sys/sysctl.h>
41 #include <sys/sysproto.h>
42 #include <sys/systm.h>
43 #include <sys/unistd.h>
44
45 #include <geom/geom.h>
46
47 #include "nvme_private.h"
48
49 struct nvme_io_test_thread {
50
51 uint32_t idx;
52 struct nvme_namespace *ns;
53 enum nvme_nvm_opcode opc;
54 struct timeval start;
55 void *buf;
56 uint32_t size;
57 uint32_t time;
58 uint64_t io_completed;
59 };
60
61 struct nvme_io_test_internal {
62
63 struct nvme_namespace *ns;
64 enum nvme_nvm_opcode opc;
65 struct timeval start;
66 uint32_t time;
67 uint32_t size;
68 uint32_t td_active;
69 uint32_t td_idx;
70 uint32_t flags;
71 uint64_t io_completed[NVME_TEST_MAX_THREADS];
72 };
73
74 static void
nvme_ns_bio_test_cb(struct bio * bio)75 nvme_ns_bio_test_cb(struct bio *bio)
76 {
77 struct mtx *mtx;
78
79 mtx = mtx_pool_find(mtxpool_sleep, bio);
80 mtx_lock(mtx);
81 wakeup(bio);
82 mtx_unlock(mtx);
83 }
84
85 static void
nvme_ns_bio_test(void * arg)86 nvme_ns_bio_test(void *arg)
87 {
88 struct nvme_io_test_internal *io_test = arg;
89 struct cdevsw *csw;
90 struct mtx *mtx;
91 struct bio *bio;
92 struct cdev *dev;
93 void *buf;
94 struct timeval t;
95 uint64_t io_completed = 0, offset;
96 uint32_t idx;
97 int ref;
98
99 buf = malloc(io_test->size, M_NVME, M_WAITOK);
100 idx = atomic_fetchadd_int(&io_test->td_idx, 1);
101 dev = io_test->ns->cdev;
102
103 offset = idx * 2048ULL * nvme_ns_get_sector_size(io_test->ns);
104
105 while (1) {
106
107 bio = g_alloc_bio();
108
109 memset(bio, 0, sizeof(*bio));
110 bio->bio_cmd = (io_test->opc == NVME_OPC_READ) ?
111 BIO_READ : BIO_WRITE;
112 bio->bio_done = nvme_ns_bio_test_cb;
113 bio->bio_dev = dev;
114 bio->bio_offset = offset;
115 bio->bio_data = buf;
116 bio->bio_bcount = io_test->size;
117
118 if (io_test->flags & NVME_TEST_FLAG_REFTHREAD) {
119 csw = dev_refthread(dev, &ref);
120 } else
121 csw = dev->si_devsw;
122
123 if (csw == NULL)
124 panic("Unable to retrieve device switch");
125 mtx = mtx_pool_find(mtxpool_sleep, bio);
126 mtx_lock(mtx);
127 (*csw->d_strategy)(bio);
128 msleep(bio, mtx, PRIBIO, "biotestwait", 0);
129 mtx_unlock(mtx);
130
131 if (io_test->flags & NVME_TEST_FLAG_REFTHREAD) {
132 dev_relthread(dev, ref);
133 }
134
135 if ((bio->bio_flags & BIO_ERROR) || (bio->bio_resid > 0))
136 break;
137
138 g_destroy_bio(bio);
139
140 io_completed++;
141
142 getmicrouptime(&t);
143 timevalsub(&t, &io_test->start);
144
145 if (t.tv_sec >= io_test->time)
146 break;
147
148 offset += io_test->size;
149 if ((offset + io_test->size) > nvme_ns_get_size(io_test->ns))
150 offset = 0;
151 }
152
153 io_test->io_completed[idx] = io_completed;
154 wakeup_one(io_test);
155
156 free(buf, M_NVME);
157
158 atomic_subtract_int(&io_test->td_active, 1);
159 mb();
160
161 kthread_exit();
162 }
163
164 static void
nvme_ns_io_test_cb(void * arg,const struct nvme_completion * cpl)165 nvme_ns_io_test_cb(void *arg, const struct nvme_completion *cpl)
166 {
167 struct nvme_io_test_thread *tth = arg;
168 struct timeval t;
169
170 tth->io_completed++;
171
172 if (nvme_completion_is_error(cpl)) {
173 printf("%s: error occurred\n", __func__);
174 wakeup_one(tth);
175 return;
176 }
177
178 getmicrouptime(&t);
179 timevalsub(&t, &tth->start);
180
181 if (t.tv_sec >= tth->time) {
182 wakeup_one(tth);
183 return;
184 }
185
186 switch (tth->opc) {
187 case NVME_OPC_WRITE:
188 nvme_ns_cmd_write(tth->ns, tth->buf, tth->idx * 2048,
189 tth->size/nvme_ns_get_sector_size(tth->ns),
190 nvme_ns_io_test_cb, tth);
191 break;
192 case NVME_OPC_READ:
193 nvme_ns_cmd_read(tth->ns, tth->buf, tth->idx * 2048,
194 tth->size/nvme_ns_get_sector_size(tth->ns),
195 nvme_ns_io_test_cb, tth);
196 break;
197 default:
198 break;
199 }
200 }
201
202 static void
nvme_ns_io_test(void * arg)203 nvme_ns_io_test(void *arg)
204 {
205 struct nvme_io_test_internal *io_test = arg;
206 struct nvme_io_test_thread *tth;
207 struct nvme_completion cpl;
208 int error;
209
210 tth = malloc(sizeof(*tth), M_NVME, M_WAITOK | M_ZERO);
211 tth->ns = io_test->ns;
212 tth->opc = io_test->opc;
213 memcpy(&tth->start, &io_test->start, sizeof(tth->start));
214 tth->buf = malloc(io_test->size, M_NVME, M_WAITOK);
215 tth->size = io_test->size;
216 tth->time = io_test->time;
217 tth->idx = atomic_fetchadd_int(&io_test->td_idx, 1);
218
219 memset(&cpl, 0, sizeof(cpl));
220
221 nvme_ns_io_test_cb(tth, &cpl);
222
223 error = tsleep(tth, 0, "test_wait", tth->time*hz*2);
224
225 if (error)
226 printf("%s: error = %d\n", __func__, error);
227
228 io_test->io_completed[tth->idx] = tth->io_completed;
229 wakeup_one(io_test);
230
231 free(tth->buf, M_NVME);
232 free(tth, M_NVME);
233
234 atomic_subtract_int(&io_test->td_active, 1);
235 mb();
236
237 kthread_exit();
238 }
239
240 void
nvme_ns_test(struct nvme_namespace * ns,u_long cmd,caddr_t arg)241 nvme_ns_test(struct nvme_namespace *ns, u_long cmd, caddr_t arg)
242 {
243 struct nvme_io_test *io_test;
244 struct nvme_io_test_internal *io_test_internal;
245 void (*fn)(void *);
246 int i;
247
248 io_test = (struct nvme_io_test *)arg;
249
250 if ((io_test->opc != NVME_OPC_READ) &&
251 (io_test->opc != NVME_OPC_WRITE))
252 return;
253
254 if (io_test->size % nvme_ns_get_sector_size(ns))
255 return;
256
257 io_test_internal = malloc(sizeof(*io_test_internal), M_NVME,
258 M_WAITOK | M_ZERO);
259 io_test_internal->opc = io_test->opc;
260 io_test_internal->ns = ns;
261 io_test_internal->td_active = io_test->num_threads;
262 io_test_internal->time = io_test->time;
263 io_test_internal->size = io_test->size;
264 io_test_internal->flags = io_test->flags;
265
266 if (cmd == NVME_IO_TEST)
267 fn = nvme_ns_io_test;
268 else
269 fn = nvme_ns_bio_test;
270
271 getmicrouptime(&io_test_internal->start);
272
273 for (i = 0; i < io_test->num_threads; i++)
274 kthread_add(fn, io_test_internal,
275 NULL, NULL, 0, 0, "nvme_io_test[%d]", i);
276
277 tsleep(io_test_internal, 0, "nvme_test", io_test->time * 2 * hz);
278
279 while (io_test_internal->td_active > 0)
280 DELAY(10);
281
282 memcpy(io_test->io_completed, io_test_internal->io_completed,
283 sizeof(io_test->io_completed));
284
285 free(io_test_internal, M_NVME);
286 }
287