Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 | // SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2007 Nokia Corporation * * Test read and write speed of a MTD device. * * Author: Adrian Hunter <adrian.hunter@nokia.com> */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/init.h> #include <linux/ktime.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/err.h> #include <linux/mtd/mtd.h> #include <linux/slab.h> #include <linux/sched.h> #include <linux/random.h> #include "mtd_test.h" static int dev = -EINVAL; module_param(dev, int, S_IRUGO); MODULE_PARM_DESC(dev, "MTD device number to use"); static int count; module_param(count, int, S_IRUGO); MODULE_PARM_DESC(count, "Maximum number of eraseblocks to use " "(0 means use all)"); static struct mtd_info *mtd; static unsigned char *iobuf; static unsigned char *bbt; static int pgsize; static int ebcnt; static int pgcnt; static int goodebcnt; static ktime_t start, finish; static int multiblock_erase(int ebnum, int blocks) { int err; struct erase_info ei; loff_t addr = (loff_t)ebnum * mtd->erasesize; memset(&ei, 0, sizeof(struct erase_info)); ei.addr = addr; ei.len = mtd->erasesize * blocks; err = mtd_erase(mtd, &ei); if (err) { pr_err("error %d while erasing EB %d, blocks %d\n", err, ebnum, blocks); return err; } return 0; } static int write_eraseblock(int ebnum) { loff_t addr = (loff_t)ebnum * mtd->erasesize; return mtdtest_write(mtd, addr, mtd->erasesize, iobuf); } static int write_eraseblock_by_page(int ebnum) { int i, err = 0; loff_t addr = (loff_t)ebnum * mtd->erasesize; void *buf = iobuf; for (i = 0; i < pgcnt; i++) { err = mtdtest_write(mtd, addr, pgsize, buf); if (err) break; addr += pgsize; buf += pgsize; } return err; } static int write_eraseblock_by_2pages(int ebnum) { size_t sz = pgsize * 2; int i, n = pgcnt / 2, err = 0; loff_t addr = (loff_t)ebnum * mtd->erasesize; void *buf = iobuf; for (i = 0; i < n; i++) { err = mtdtest_write(mtd, addr, sz, buf); if (err) return err; addr += sz; buf += sz; } if (pgcnt % 2) err = mtdtest_write(mtd, addr, pgsize, buf); return err; } static int read_eraseblock(int ebnum) { loff_t addr = (loff_t)ebnum * mtd->erasesize; return mtdtest_read(mtd, addr, mtd->erasesize, iobuf); } static int read_eraseblock_by_page(int ebnum) { int i, err = 0; loff_t addr = (loff_t)ebnum * mtd->erasesize; void *buf = iobuf; for (i = 0; i < pgcnt; i++) { err = mtdtest_read(mtd, addr, pgsize, buf); if (err) break; addr += pgsize; buf += pgsize; } return err; } static int read_eraseblock_by_2pages(int ebnum) { size_t sz = pgsize * 2; int i, n = pgcnt / 2, err = 0; loff_t addr = (loff_t)ebnum * mtd->erasesize; void *buf = iobuf; for (i = 0; i < n; i++) { err = mtdtest_read(mtd, addr, sz, buf); if (err) return err; addr += sz; buf += sz; } if (pgcnt % 2) err = mtdtest_read(mtd, addr, pgsize, buf); return err; } static inline void start_timing(void) { start = ktime_get(); } static inline void stop_timing(void) { finish = ktime_get(); } static long calc_speed(void) { uint64_t k, us; us = ktime_us_delta(finish, start); if (us == 0) return 0; k = (uint64_t)goodebcnt * (mtd->erasesize / 1024) * 1000000; do_div(k, us); return k; } static int __init mtd_speedtest_init(void) { int err, i, blocks, j, k; long speed; uint64_t tmp; printk(KERN_INFO "\n"); printk(KERN_INFO "=================================================\n"); if (dev < 0) { pr_info("Please specify a valid mtd-device via module parameter\n"); pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n"); return -EINVAL; } if (count) pr_info("MTD device: %d count: %d\n", dev, count); else pr_info("MTD device: %d\n", dev); mtd = get_mtd_device(NULL, dev); if (IS_ERR(mtd)) { err = PTR_ERR(mtd); pr_err("error: cannot get MTD device\n"); return err; } if (mtd->writesize == 1) { pr_info("not NAND flash, assume page size is 512 " "bytes.\n"); pgsize = 512; } else pgsize = mtd->writesize; tmp = mtd->size; do_div(tmp, mtd->erasesize); ebcnt = tmp; pgcnt = mtd->erasesize / pgsize; pr_info("MTD device size %llu, eraseblock size %u, " "page size %u, count of eraseblocks %u, pages per " "eraseblock %u, OOB size %u\n", (unsigned long long)mtd->size, mtd->erasesize, pgsize, ebcnt, pgcnt, mtd->oobsize); if (count > 0 && count < ebcnt) ebcnt = count; err = -ENOMEM; iobuf = kmalloc(mtd->erasesize, GFP_KERNEL); if (!iobuf) goto out; get_random_bytes(iobuf, mtd->erasesize); bbt = kzalloc(ebcnt, GFP_KERNEL); if (!bbt) goto out; err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt); if (err) goto out; for (i = 0; i < ebcnt; i++) { if (!bbt[i]) goodebcnt++; } err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); if (err) goto out; /* Write all eraseblocks, 1 eraseblock at a time */ pr_info("testing eraseblock write speed\n"); start_timing(); for (i = 0; i < ebcnt; ++i) { if (bbt[i]) continue; err = write_eraseblock(i); if (err) goto out; err = mtdtest_relax(); if (err) goto out; } stop_timing(); speed = calc_speed(); pr_info("eraseblock write speed is %ld KiB/s\n", speed); /* Read all eraseblocks, 1 eraseblock at a time */ pr_info("testing eraseblock read speed\n"); start_timing(); for (i = 0; i < ebcnt; ++i) { if (bbt[i]) continue; err = read_eraseblock(i); if (err) goto out; err = mtdtest_relax(); if (err) goto out; } stop_timing(); speed = calc_speed(); pr_info("eraseblock read speed is %ld KiB/s\n", speed); err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); if (err) goto out; /* Write all eraseblocks, 1 page at a time */ pr_info("testing page write speed\n"); start_timing(); for (i = 0; i < ebcnt; ++i) { if (bbt[i]) continue; err = write_eraseblock_by_page(i); if (err) goto out; err = mtdtest_relax(); if (err) goto out; } stop_timing(); speed = calc_speed(); pr_info("page write speed is %ld KiB/s\n", speed); /* Read all eraseblocks, 1 page at a time */ pr_info("testing page read speed\n"); start_timing(); for (i = 0; i < ebcnt; ++i) { if (bbt[i]) continue; err = read_eraseblock_by_page(i); if (err) goto out; err = mtdtest_relax(); if (err) goto out; } stop_timing(); speed = calc_speed(); pr_info("page read speed is %ld KiB/s\n", speed); err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); if (err) goto out; /* Write all eraseblocks, 2 pages at a time */ pr_info("testing 2 page write speed\n"); start_timing(); for (i = 0; i < ebcnt; ++i) { if (bbt[i]) continue; err = write_eraseblock_by_2pages(i); if (err) goto out; err = mtdtest_relax(); if (err) goto out; } stop_timing(); speed = calc_speed(); pr_info("2 page write speed is %ld KiB/s\n", speed); /* Read all eraseblocks, 2 pages at a time */ pr_info("testing 2 page read speed\n"); start_timing(); for (i = 0; i < ebcnt; ++i) { if (bbt[i]) continue; err = read_eraseblock_by_2pages(i); if (err) goto out; err = mtdtest_relax(); if (err) goto out; } stop_timing(); speed = calc_speed(); pr_info("2 page read speed is %ld KiB/s\n", speed); /* Erase all eraseblocks */ pr_info("Testing erase speed\n"); start_timing(); err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); if (err) goto out; stop_timing(); speed = calc_speed(); pr_info("erase speed is %ld KiB/s\n", speed); /* Multi-block erase all eraseblocks */ for (k = 1; k < 7; k++) { blocks = 1 << k; pr_info("Testing %dx multi-block erase speed\n", blocks); start_timing(); for (i = 0; i < ebcnt; ) { for (j = 0; j < blocks && (i + j) < ebcnt; j++) if (bbt[i + j]) break; if (j < 1) { i++; continue; } err = multiblock_erase(i, j); if (err) goto out; err = mtdtest_relax(); if (err) goto out; i += j; } stop_timing(); speed = calc_speed(); pr_info("%dx multi-block erase speed is %ld KiB/s\n", blocks, speed); } pr_info("finished\n"); out: kfree(iobuf); kfree(bbt); put_mtd_device(mtd); if (err) pr_info("error %d occurred\n", err); printk(KERN_INFO "=================================================\n"); return err; } module_init(mtd_speedtest_init); static void __exit mtd_speedtest_exit(void) { return; } module_exit(mtd_speedtest_exit); MODULE_DESCRIPTION("Speed test module"); MODULE_AUTHOR("Adrian Hunter"); MODULE_LICENSE("GPL"); |