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 * Copyright (C) 2012-2013 Intel Corporation 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/bio.h> 32 #include <sys/conf.h> 33 #include <sys/fcntl.h> 34 #include <sys/kthread.h> 35 #include <sys/module.h> 36 #include <sys/proc.h> 37 #include <sys/syscallsubr.h> 38 #include <sys/sysctl.h> 39 #include <sys/sysproto.h> 40 #include <sys/systm.h> 41 #include <sys/unistd.h> 42 43 #include <geom/geom.h> 44 45 #include "nvme_private.h" 46 47 struct nvme_io_test_thread { 48 49 uint32_t idx; 50 struct nvme_namespace *ns; 51 enum nvme_nvm_opcode opc; 52 struct timeval start; 53 void *buf; 54 uint32_t size; 55 uint32_t time; 56 uint64_t io_completed; 57 }; 58 59 struct nvme_io_test_internal { 60 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 * 2048 * nvme_ns_get_sector_size(io_test->ns); 102 103 while (1) { 104 105 bio = g_alloc_bio(); 106 107 memset(bio, 0, sizeof(*bio)); 108 bio->bio_cmd = (io_test->opc == NVME_OPC_READ) ? 109 BIO_READ : BIO_WRITE; 110 bio->bio_done = nvme_ns_bio_test_cb; 111 bio->bio_dev = dev; 112 bio->bio_offset = offset; 113 bio->bio_data = buf; 114 bio->bio_bcount = io_test->size; 115 116 if (io_test->flags & NVME_TEST_FLAG_REFTHREAD) { 117 csw = dev_refthread(dev, &ref); 118 } else 119 csw = dev->si_devsw; 120 121 mtx = mtx_pool_find(mtxpool_sleep, bio); 122 mtx_lock(mtx); 123 (*csw->d_strategy)(bio); 124 msleep(bio, mtx, PRIBIO, "biotestwait", 0); 125 mtx_unlock(mtx); 126 127 if (io_test->flags & NVME_TEST_FLAG_REFTHREAD) { 128 dev_relthread(dev, ref); 129 } 130 131 if ((bio->bio_flags & BIO_ERROR) || (bio->bio_resid > 0)) 132 break; 133 134 g_destroy_bio(bio); 135 136 io_completed++; 137 138 getmicrouptime(&t); 139 timevalsub(&t, &io_test->start); 140 141 if (t.tv_sec >= io_test->time) 142 break; 143 144 offset += io_test->size; 145 if ((offset + io_test->size) > nvme_ns_get_size(io_test->ns)) 146 offset = 0; 147 } 148 149 io_test->io_completed[idx] = io_completed; 150 wakeup_one(io_test); 151 152 free(buf, M_NVME); 153 154 atomic_subtract_int(&io_test->td_active, 1); 155 mb(); 156 157 kthread_exit(); 158 } 159 160 static void 161 nvme_ns_io_test_cb(void *arg, const struct nvme_completion *cpl) 162 { 163 struct nvme_io_test_thread *tth = arg; 164 struct timeval t; 165 166 tth->io_completed++; 167 168 if (nvme_completion_is_error(cpl)) { 169 printf("%s: error occurred\n", __func__); 170 wakeup_one(tth); 171 return; 172 } 173 174 getmicrouptime(&t); 175 timevalsub(&t, &tth->start); 176 177 if (t.tv_sec >= tth->time) { 178 wakeup_one(tth); 179 return; 180 } 181 182 switch (tth->opc) { 183 case NVME_OPC_WRITE: 184 nvme_ns_cmd_write(tth->ns, tth->buf, tth->idx * 2048, 185 tth->size/nvme_ns_get_sector_size(tth->ns), 186 nvme_ns_io_test_cb, tth); 187 break; 188 case NVME_OPC_READ: 189 nvme_ns_cmd_read(tth->ns, tth->buf, tth->idx * 2048, 190 tth->size/nvme_ns_get_sector_size(tth->ns), 191 nvme_ns_io_test_cb, tth); 192 break; 193 default: 194 break; 195 } 196 } 197 198 static void 199 nvme_ns_io_test(void *arg) 200 { 201 struct nvme_io_test_internal *io_test = arg; 202 struct nvme_io_test_thread *tth; 203 struct nvme_completion cpl; 204 int error; 205 206 tth = malloc(sizeof(*tth), M_NVME, M_WAITOK | M_ZERO); 207 tth->ns = io_test->ns; 208 tth->opc = io_test->opc; 209 memcpy(&tth->start, &io_test->start, sizeof(tth->start)); 210 tth->buf = malloc(io_test->size, M_NVME, M_WAITOK); 211 tth->size = io_test->size; 212 tth->time = io_test->time; 213 tth->idx = atomic_fetchadd_int(&io_test->td_idx, 1); 214 215 memset(&cpl, 0, sizeof(cpl)); 216 217 nvme_ns_io_test_cb(tth, &cpl); 218 219 error = tsleep(tth, 0, "test_wait", tth->time*hz*2); 220 221 if (error) 222 printf("%s: error = %d\n", __func__, error); 223 224 io_test->io_completed[tth->idx] = tth->io_completed; 225 wakeup_one(io_test); 226 227 free(tth->buf, M_NVME); 228 free(tth, M_NVME); 229 230 atomic_subtract_int(&io_test->td_active, 1); 231 mb(); 232 233 kthread_exit(); 234 } 235 236 void 237 nvme_ns_test(struct nvme_namespace *ns, u_long cmd, caddr_t arg) 238 { 239 struct nvme_io_test *io_test; 240 struct nvme_io_test_internal *io_test_internal; 241 void (*fn)(void *); 242 int i; 243 244 io_test = (struct nvme_io_test *)arg; 245 246 if ((io_test->opc != NVME_OPC_READ) && 247 (io_test->opc != NVME_OPC_WRITE)) 248 return; 249 250 if (io_test->size % nvme_ns_get_sector_size(ns)) 251 return; 252 253 io_test_internal = malloc(sizeof(*io_test_internal), M_NVME, 254 M_WAITOK | M_ZERO); 255 io_test_internal->opc = io_test->opc; 256 io_test_internal->ns = ns; 257 io_test_internal->td_active = io_test->num_threads; 258 io_test_internal->time = io_test->time; 259 io_test_internal->size = io_test->size; 260 io_test_internal->flags = io_test->flags; 261 262 if (cmd == NVME_IO_TEST) 263 fn = nvme_ns_io_test; 264 else 265 fn = nvme_ns_bio_test; 266 267 getmicrouptime(&io_test_internal->start); 268 269 for (i = 0; i < io_test->num_threads; i++) 270 kthread_add(fn, io_test_internal, 271 NULL, NULL, 0, 0, "nvme_io_test[%d]", i); 272 273 tsleep(io_test_internal, 0, "nvme_test", io_test->time * 2 * hz); 274 275 while (io_test_internal->td_active > 0) 276 DELAY(10); 277 278 memcpy(io_test->io_completed, io_test_internal->io_completed, 279 sizeof(io_test->io_completed)); 280 281 free(io_test_internal, M_NVME); 282 }
Cache object: 073709f4937ba3afc6c06779d609035b
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