xref: /freebsd/sys/dev/nvme/nvme_test.c (revision 2f513db72b034fd5ef7f080b11be5c711c15186a)
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("$FreeBSD$");
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
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
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 * 2048 * 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 		mtx = mtx_pool_find(mtxpool_sleep, bio);
124 		mtx_lock(mtx);
125 		(*csw->d_strategy)(bio);
126 		msleep(bio, mtx, PRIBIO, "biotestwait", 0);
127 		mtx_unlock(mtx);
128 
129 		if (io_test->flags & NVME_TEST_FLAG_REFTHREAD) {
130 			dev_relthread(dev, ref);
131 		}
132 
133 		if ((bio->bio_flags & BIO_ERROR) || (bio->bio_resid > 0))
134 			break;
135 
136 		g_destroy_bio(bio);
137 
138 		io_completed++;
139 
140 		getmicrouptime(&t);
141 		timevalsub(&t, &io_test->start);
142 
143 		if (t.tv_sec >= io_test->time)
144 			break;
145 
146 		offset += io_test->size;
147 		if ((offset + io_test->size) > nvme_ns_get_size(io_test->ns))
148 			offset = 0;
149 	}
150 
151 	io_test->io_completed[idx] = io_completed;
152 	wakeup_one(io_test);
153 
154 	free(buf, M_NVME);
155 
156 	atomic_subtract_int(&io_test->td_active, 1);
157 	mb();
158 
159 	kthread_exit();
160 }
161 
162 static void
163 nvme_ns_io_test_cb(void *arg, const struct nvme_completion *cpl)
164 {
165 	struct nvme_io_test_thread	*tth = arg;
166 	struct timeval			t;
167 
168 	tth->io_completed++;
169 
170 	if (nvme_completion_is_error(cpl)) {
171 		printf("%s: error occurred\n", __func__);
172 		wakeup_one(tth);
173 		return;
174 	}
175 
176 	getmicrouptime(&t);
177 	timevalsub(&t, &tth->start);
178 
179 	if (t.tv_sec >= tth->time) {
180 		wakeup_one(tth);
181 		return;
182 	}
183 
184 	switch (tth->opc) {
185 	case NVME_OPC_WRITE:
186 		nvme_ns_cmd_write(tth->ns, tth->buf, tth->idx * 2048,
187 		    tth->size/nvme_ns_get_sector_size(tth->ns),
188 		    nvme_ns_io_test_cb, tth);
189 		break;
190 	case NVME_OPC_READ:
191 		nvme_ns_cmd_read(tth->ns, tth->buf, tth->idx * 2048,
192 		    tth->size/nvme_ns_get_sector_size(tth->ns),
193 		    nvme_ns_io_test_cb, tth);
194 		break;
195 	default:
196 		break;
197 	}
198 }
199 
200 static void
201 nvme_ns_io_test(void *arg)
202 {
203 	struct nvme_io_test_internal	*io_test = arg;
204 	struct nvme_io_test_thread	*tth;
205 	struct nvme_completion		cpl;
206 	int				error;
207 
208 	tth = malloc(sizeof(*tth), M_NVME, M_WAITOK | M_ZERO);
209 	tth->ns = io_test->ns;
210 	tth->opc = io_test->opc;
211 	memcpy(&tth->start, &io_test->start, sizeof(tth->start));
212 	tth->buf = malloc(io_test->size, M_NVME, M_WAITOK);
213 	tth->size = io_test->size;
214 	tth->time = io_test->time;
215 	tth->idx = atomic_fetchadd_int(&io_test->td_idx, 1);
216 
217 	memset(&cpl, 0, sizeof(cpl));
218 
219 	nvme_ns_io_test_cb(tth, &cpl);
220 
221 	error = tsleep(tth, 0, "test_wait", tth->time*hz*2);
222 
223 	if (error)
224 		printf("%s: error = %d\n", __func__, error);
225 
226 	io_test->io_completed[tth->idx] = tth->io_completed;
227 	wakeup_one(io_test);
228 
229 	free(tth->buf, M_NVME);
230 	free(tth, M_NVME);
231 
232 	atomic_subtract_int(&io_test->td_active, 1);
233 	mb();
234 
235 	kthread_exit();
236 }
237 
238 void
239 nvme_ns_test(struct nvme_namespace *ns, u_long cmd, caddr_t arg)
240 {
241 	struct nvme_io_test		*io_test;
242 	struct nvme_io_test_internal	*io_test_internal;
243 	void				(*fn)(void *);
244 	int				i;
245 
246 	io_test = (struct nvme_io_test *)arg;
247 
248 	if ((io_test->opc != NVME_OPC_READ) &&
249 	    (io_test->opc != NVME_OPC_WRITE))
250 		return;
251 
252 	if (io_test->size % nvme_ns_get_sector_size(ns))
253 		return;
254 
255 	io_test_internal = malloc(sizeof(*io_test_internal), M_NVME,
256 	    M_WAITOK | M_ZERO);
257 	io_test_internal->opc = io_test->opc;
258 	io_test_internal->ns = ns;
259 	io_test_internal->td_active = io_test->num_threads;
260 	io_test_internal->time = io_test->time;
261 	io_test_internal->size = io_test->size;
262 	io_test_internal->flags = io_test->flags;
263 
264 	if (cmd == NVME_IO_TEST)
265 		fn = nvme_ns_io_test;
266 	else
267 		fn = nvme_ns_bio_test;
268 
269 	getmicrouptime(&io_test_internal->start);
270 
271 	for (i = 0; i < io_test->num_threads; i++)
272 		kthread_add(fn, io_test_internal,
273 		    NULL, NULL, 0, 0, "nvme_io_test[%d]", i);
274 
275 	tsleep(io_test_internal, 0, "nvme_test", io_test->time * 2 * hz);
276 
277 	while (io_test_internal->td_active > 0)
278 		DELAY(10);
279 
280 	memcpy(io_test->io_completed, io_test_internal->io_completed,
281 	    sizeof(io_test->io_completed));
282 
283 	free(io_test_internal, M_NVME);
284 }
285