Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/nvme/nvme_test.c
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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 uint32_t idx; 51 struct nvme_namespace *ns; 52 enum nvme_nvm_opcode opc; 53 struct timeval start; 54 void *buf; 55 uint32_t size; 56 uint32_t time; 57 uint64_t io_completed; 58 }; 59 60 struct nvme_io_test_internal { 61 struct nvme_namespace *ns; 62 enum nvme_nvm_opcode opc; 63 struct timeval start; 64 uint32_t time; 65 uint32_t size; 66 uint32_t td_active; 67 uint32_t td_idx; 68 uint32_t flags; 69 uint64_t io_completed[NVME_TEST_MAX_THREADS]; 70 }; 71 72 static void 73 nvme_ns_bio_test_cb(struct bio *bio) 74 { 75 struct mtx *mtx; 76 77 mtx = mtx_pool_find(mtxpool_sleep, bio); 78 mtx_lock(mtx); 79 wakeup(bio); 80 mtx_unlock(mtx); 81 } 82 83 static void 84 nvme_ns_bio_test(void *arg) 85 { 86 struct nvme_io_test_internal *io_test = arg; 87 struct cdevsw *csw; 88 struct mtx *mtx; 89 struct bio *bio; 90 struct cdev *dev; 91 void *buf; 92 struct timeval t; 93 uint64_t io_completed = 0, offset; 94 uint32_t idx; 95 int ref; 96 97 buf = malloc(io_test->size, M_NVME, M_WAITOK); 98 idx = atomic_fetchadd_int(&io_test->td_idx, 1); 99 dev = io_test->ns->cdev; 100 101 offset = idx * 2048ULL * nvme_ns_get_sector_size(io_test->ns); 102 103 while (1) { 104 bio = g_alloc_bio(); 105 106 memset(bio, 0, sizeof(*bio)); 107 bio->bio_cmd = (io_test->opc == NVME_OPC_READ) ? 108 BIO_READ : BIO_WRITE; 109 bio->bio_done = nvme_ns_bio_test_cb; 110 bio->bio_dev = dev; 111 bio->bio_offset = offset; 112 bio->bio_data = buf; 113 bio->bio_bcount = io_test->size; 114 115 if (io_test->flags & NVME_TEST_FLAG_REFTHREAD) { 116 csw = dev_refthread(dev, &ref); 117 } else 118 csw = dev->si_devsw; 119 120 if (csw == NULL) 121 panic("Unable to retrieve device switch"); 122 mtx = mtx_pool_find(mtxpool_sleep, bio); 123 mtx_lock(mtx); 124 (*csw->d_strategy)(bio); 125 msleep(bio, mtx, PRIBIO, "biotestwait", 0); 126 mtx_unlock(mtx); 127 128 if (io_test->flags & NVME_TEST_FLAG_REFTHREAD) { 129 dev_relthread(dev, ref); 130 } 131 132 if ((bio->bio_flags & BIO_ERROR) || (bio->bio_resid > 0)) 133 break; 134 135 g_destroy_bio(bio); 136 137 io_completed++; 138 139 getmicrouptime(&t); 140 timevalsub(&t, &io_test->start); 141 142 if (t.tv_sec >= io_test->time) 143 break; 144 145 offset += io_test->size; 146 if ((offset + io_test->size) > nvme_ns_get_size(io_test->ns)) 147 offset = 0; 148 } 149 150 io_test->io_completed[idx] = io_completed; 151 wakeup_one(io_test); 152 153 free(buf, M_NVME); 154 155 atomic_subtract_int(&io_test->td_active, 1); 156 mb(); 157 158 kthread_exit(); 159 } 160 161 static void 162 nvme_ns_io_test_cb(void *arg, const struct nvme_completion *cpl) 163 { 164 struct nvme_io_test_thread *tth = arg; 165 struct timeval t; 166 167 tth->io_completed++; 168 169 if (nvme_completion_is_error(cpl)) { 170 printf("%s: error occurred\n", __func__); 171 wakeup_one(tth); 172 return; 173 } 174 175 getmicrouptime(&t); 176 timevalsub(&t, &tth->start); 177 178 if (t.tv_sec >= tth->time) { 179 wakeup_one(tth); 180 return; 181 } 182 183 switch (tth->opc) { 184 case NVME_OPC_WRITE: 185 nvme_ns_cmd_write(tth->ns, tth->buf, tth->idx * 2048, 186 tth->size/nvme_ns_get_sector_size(tth->ns), 187 nvme_ns_io_test_cb, tth); 188 break; 189 case NVME_OPC_READ: 190 nvme_ns_cmd_read(tth->ns, tth->buf, tth->idx * 2048, 191 tth->size/nvme_ns_get_sector_size(tth->ns), 192 nvme_ns_io_test_cb, tth); 193 break; 194 default: 195 break; 196 } 197 } 198 199 static void 200 nvme_ns_io_test(void *arg) 201 { 202 struct nvme_io_test_internal *io_test = arg; 203 struct nvme_io_test_thread *tth; 204 struct nvme_completion cpl; 205 int error; 206 207 tth = malloc(sizeof(*tth), M_NVME, M_WAITOK | M_ZERO); 208 tth->ns = io_test->ns; 209 tth->opc = io_test->opc; 210 memcpy(&tth->start, &io_test->start, sizeof(tth->start)); 211 tth->buf = malloc(io_test->size, M_NVME, M_WAITOK); 212 tth->size = io_test->size; 213 tth->time = io_test->time; 214 tth->idx = atomic_fetchadd_int(&io_test->td_idx, 1); 215 216 memset(&cpl, 0, sizeof(cpl)); 217 218 nvme_ns_io_test_cb(tth, &cpl); 219 220 error = tsleep(tth, 0, "test_wait", tth->time*hz*2); 221 222 if (error) 223 printf("%s: error = %d\n", __func__, error); 224 225 io_test->io_completed[tth->idx] = tth->io_completed; 226 wakeup_one(io_test); 227 228 free(tth->buf, M_NVME); 229 free(tth, M_NVME); 230 231 atomic_subtract_int(&io_test->td_active, 1); 232 mb(); 233 234 kthread_exit(); 235 } 236 237 void 238 nvme_ns_test(struct nvme_namespace *ns, u_long cmd, caddr_t arg) 239 { 240 struct nvme_io_test *io_test; 241 struct nvme_io_test_internal *io_test_internal; 242 void (*fn)(void *); 243 int i; 244 245 io_test = (struct nvme_io_test *)arg; 246 247 if ((io_test->opc != NVME_OPC_READ) && 248 (io_test->opc != NVME_OPC_WRITE)) 249 return; 250 251 if (io_test->size % nvme_ns_get_sector_size(ns)) 252 return; 253 254 io_test_internal = malloc(sizeof(*io_test_internal), M_NVME, 255 M_WAITOK | M_ZERO); 256 io_test_internal->opc = io_test->opc; 257 io_test_internal->ns = ns; 258 io_test_internal->td_active = io_test->num_threads; 259 io_test_internal->time = io_test->time; 260 io_test_internal->size = io_test->size; 261 io_test_internal->flags = io_test->flags; 262 263 if (cmd == NVME_IO_TEST) 264 fn = nvme_ns_io_test; 265 else 266 fn = nvme_ns_bio_test; 267 268 getmicrouptime(&io_test_internal->start); 269 270 for (i = 0; i < io_test->num_threads; i++) 271 kthread_add(fn, io_test_internal, 272 NULL, NULL, 0, 0, "nvme_io_test[%d]", i); 273 274 tsleep(io_test_internal, 0, "nvme_test", io_test->time * 2 * hz); 275 276 while (io_test_internal->td_active > 0) 277 DELAY(10); 278 279 memcpy(io_test->io_completed, io_test_internal->io_completed, 280 sizeof(io_test->io_completed)); 281 282 free(io_test_internal, M_NVME); 283 }
Cache object: a30304a933f90938d1b239016ccfc94b
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