1 /* 2 * Copyright (C) 2007 Nokia Corporation 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 as published by 6 * the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 * 13 * You should have received a copy of the GNU General Public License along with 14 * this program; see the file COPYING. If not, write to the Free Software 15 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 16 * 17 * Test read and write speed of a MTD device. 18 * 19 * Author: Adrian Hunter <adrian.hunter@nokia.com> 20 */ 21 22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 23 24 #include <linux/init.h> 25 #include <linux/module.h> 26 #include <linux/moduleparam.h> 27 #include <linux/err.h> 28 #include <linux/mtd/mtd.h> 29 #include <linux/slab.h> 30 #include <linux/sched.h> 31 #include <linux/random.h> 32 33 #include "mtd_test.h" 34 35 static int dev = -EINVAL; 36 module_param(dev, int, S_IRUGO); 37 MODULE_PARM_DESC(dev, "MTD device number to use"); 38 39 static int count; 40 module_param(count, int, S_IRUGO); 41 MODULE_PARM_DESC(count, "Maximum number of eraseblocks to use " 42 "(0 means use all)"); 43 44 static struct mtd_info *mtd; 45 static unsigned char *iobuf; 46 static unsigned char *bbt; 47 48 static int pgsize; 49 static int ebcnt; 50 static int pgcnt; 51 static int goodebcnt; 52 static struct timeval start, finish; 53 54 static int multiblock_erase(int ebnum, int blocks) 55 { 56 int err; 57 struct erase_info ei; 58 loff_t addr = ebnum * mtd->erasesize; 59 60 memset(&ei, 0, sizeof(struct erase_info)); 61 ei.mtd = mtd; 62 ei.addr = addr; 63 ei.len = mtd->erasesize * blocks; 64 65 err = mtd_erase(mtd, &ei); 66 if (err) { 67 pr_err("error %d while erasing EB %d, blocks %d\n", 68 err, ebnum, blocks); 69 return err; 70 } 71 72 if (ei.state == MTD_ERASE_FAILED) { 73 pr_err("some erase error occurred at EB %d," 74 "blocks %d\n", ebnum, blocks); 75 return -EIO; 76 } 77 78 return 0; 79 } 80 81 static int write_eraseblock(int ebnum) 82 { 83 int err; 84 loff_t addr = ebnum * mtd->erasesize; 85 86 err = mtdtest_write(mtd, addr, mtd->erasesize, iobuf); 87 if (err) 88 pr_err("error: write failed at %#llx\n", addr); 89 90 return err; 91 } 92 93 static int write_eraseblock_by_page(int ebnum) 94 { 95 int i, err = 0; 96 loff_t addr = ebnum * mtd->erasesize; 97 void *buf = iobuf; 98 99 for (i = 0; i < pgcnt; i++) { 100 err = mtdtest_write(mtd, addr, pgsize, buf); 101 if (err) { 102 pr_err("error: write failed at %#llx\n", 103 addr); 104 break; 105 } 106 addr += pgsize; 107 buf += pgsize; 108 } 109 110 return err; 111 } 112 113 static int write_eraseblock_by_2pages(int ebnum) 114 { 115 size_t sz = pgsize * 2; 116 int i, n = pgcnt / 2, err = 0; 117 loff_t addr = ebnum * mtd->erasesize; 118 void *buf = iobuf; 119 120 for (i = 0; i < n; i++) { 121 err = mtdtest_write(mtd, addr, sz, buf); 122 if (err) { 123 pr_err("error: write failed at %#llx\n", 124 addr); 125 return err; 126 } 127 addr += sz; 128 buf += sz; 129 } 130 if (pgcnt % 2) { 131 err = mtdtest_write(mtd, addr, pgsize, buf); 132 if (err) { 133 pr_err("error: write failed at %#llx\n", 134 addr); 135 } 136 } 137 138 return err; 139 } 140 141 static int read_eraseblock(int ebnum) 142 { 143 int err; 144 loff_t addr = ebnum * mtd->erasesize; 145 146 err = mtdtest_read(mtd, addr, mtd->erasesize, iobuf); 147 if (err) 148 pr_err("error: read failed at %#llx\n", addr); 149 150 return err; 151 } 152 153 static int read_eraseblock_by_page(int ebnum) 154 { 155 int i, err = 0; 156 loff_t addr = ebnum * mtd->erasesize; 157 void *buf = iobuf; 158 159 for (i = 0; i < pgcnt; i++) { 160 err = mtdtest_read(mtd, addr, pgsize, buf); 161 if (err) { 162 pr_err("error: read failed at %#llx\n", 163 addr); 164 break; 165 } 166 addr += pgsize; 167 buf += pgsize; 168 } 169 170 return err; 171 } 172 173 static int read_eraseblock_by_2pages(int ebnum) 174 { 175 size_t sz = pgsize * 2; 176 int i, n = pgcnt / 2, err = 0; 177 loff_t addr = ebnum * mtd->erasesize; 178 void *buf = iobuf; 179 180 for (i = 0; i < n; i++) { 181 err = mtdtest_read(mtd, addr, sz, buf); 182 if (err) { 183 pr_err("error: read failed at %#llx\n", 184 addr); 185 return err; 186 } 187 addr += sz; 188 buf += sz; 189 } 190 if (pgcnt % 2) { 191 err = mtdtest_read(mtd, addr, pgsize, buf); 192 if (err) { 193 pr_err("error: read failed at %#llx\n", 194 addr); 195 } 196 } 197 198 return err; 199 } 200 201 static inline void start_timing(void) 202 { 203 do_gettimeofday(&start); 204 } 205 206 static inline void stop_timing(void) 207 { 208 do_gettimeofday(&finish); 209 } 210 211 static long calc_speed(void) 212 { 213 uint64_t k; 214 long ms; 215 216 ms = (finish.tv_sec - start.tv_sec) * 1000 + 217 (finish.tv_usec - start.tv_usec) / 1000; 218 if (ms == 0) 219 return 0; 220 k = goodebcnt * (mtd->erasesize / 1024) * 1000; 221 do_div(k, ms); 222 return k; 223 } 224 225 static int __init mtd_speedtest_init(void) 226 { 227 int err, i, blocks, j, k; 228 long speed; 229 uint64_t tmp; 230 231 printk(KERN_INFO "\n"); 232 printk(KERN_INFO "=================================================\n"); 233 234 if (dev < 0) { 235 pr_info("Please specify a valid mtd-device via module parameter\n"); 236 pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n"); 237 return -EINVAL; 238 } 239 240 if (count) 241 pr_info("MTD device: %d count: %d\n", dev, count); 242 else 243 pr_info("MTD device: %d\n", dev); 244 245 mtd = get_mtd_device(NULL, dev); 246 if (IS_ERR(mtd)) { 247 err = PTR_ERR(mtd); 248 pr_err("error: cannot get MTD device\n"); 249 return err; 250 } 251 252 if (mtd->writesize == 1) { 253 pr_info("not NAND flash, assume page size is 512 " 254 "bytes.\n"); 255 pgsize = 512; 256 } else 257 pgsize = mtd->writesize; 258 259 tmp = mtd->size; 260 do_div(tmp, mtd->erasesize); 261 ebcnt = tmp; 262 pgcnt = mtd->erasesize / pgsize; 263 264 pr_info("MTD device size %llu, eraseblock size %u, " 265 "page size %u, count of eraseblocks %u, pages per " 266 "eraseblock %u, OOB size %u\n", 267 (unsigned long long)mtd->size, mtd->erasesize, 268 pgsize, ebcnt, pgcnt, mtd->oobsize); 269 270 if (count > 0 && count < ebcnt) 271 ebcnt = count; 272 273 err = -ENOMEM; 274 iobuf = kmalloc(mtd->erasesize, GFP_KERNEL); 275 if (!iobuf) 276 goto out; 277 278 prandom_bytes(iobuf, mtd->erasesize); 279 280 bbt = kzalloc(ebcnt, GFP_KERNEL); 281 if (!bbt) 282 goto out; 283 err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt); 284 if (err) 285 goto out; 286 for (i = 0; i < ebcnt; i++) { 287 if (!bbt[i]) 288 goodebcnt++; 289 } 290 291 err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); 292 if (err) 293 goto out; 294 295 /* Write all eraseblocks, 1 eraseblock at a time */ 296 pr_info("testing eraseblock write speed\n"); 297 start_timing(); 298 for (i = 0; i < ebcnt; ++i) { 299 if (bbt[i]) 300 continue; 301 err = write_eraseblock(i); 302 if (err) 303 goto out; 304 cond_resched(); 305 } 306 stop_timing(); 307 speed = calc_speed(); 308 pr_info("eraseblock write speed is %ld KiB/s\n", speed); 309 310 /* Read all eraseblocks, 1 eraseblock at a time */ 311 pr_info("testing eraseblock read speed\n"); 312 start_timing(); 313 for (i = 0; i < ebcnt; ++i) { 314 if (bbt[i]) 315 continue; 316 err = read_eraseblock(i); 317 if (err) 318 goto out; 319 cond_resched(); 320 } 321 stop_timing(); 322 speed = calc_speed(); 323 pr_info("eraseblock read speed is %ld KiB/s\n", speed); 324 325 err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); 326 if (err) 327 goto out; 328 329 /* Write all eraseblocks, 1 page at a time */ 330 pr_info("testing page write speed\n"); 331 start_timing(); 332 for (i = 0; i < ebcnt; ++i) { 333 if (bbt[i]) 334 continue; 335 err = write_eraseblock_by_page(i); 336 if (err) 337 goto out; 338 cond_resched(); 339 } 340 stop_timing(); 341 speed = calc_speed(); 342 pr_info("page write speed is %ld KiB/s\n", speed); 343 344 /* Read all eraseblocks, 1 page at a time */ 345 pr_info("testing page read speed\n"); 346 start_timing(); 347 for (i = 0; i < ebcnt; ++i) { 348 if (bbt[i]) 349 continue; 350 err = read_eraseblock_by_page(i); 351 if (err) 352 goto out; 353 cond_resched(); 354 } 355 stop_timing(); 356 speed = calc_speed(); 357 pr_info("page read speed is %ld KiB/s\n", speed); 358 359 err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); 360 if (err) 361 goto out; 362 363 /* Write all eraseblocks, 2 pages at a time */ 364 pr_info("testing 2 page write speed\n"); 365 start_timing(); 366 for (i = 0; i < ebcnt; ++i) { 367 if (bbt[i]) 368 continue; 369 err = write_eraseblock_by_2pages(i); 370 if (err) 371 goto out; 372 cond_resched(); 373 } 374 stop_timing(); 375 speed = calc_speed(); 376 pr_info("2 page write speed is %ld KiB/s\n", speed); 377 378 /* Read all eraseblocks, 2 pages at a time */ 379 pr_info("testing 2 page read speed\n"); 380 start_timing(); 381 for (i = 0; i < ebcnt; ++i) { 382 if (bbt[i]) 383 continue; 384 err = read_eraseblock_by_2pages(i); 385 if (err) 386 goto out; 387 cond_resched(); 388 } 389 stop_timing(); 390 speed = calc_speed(); 391 pr_info("2 page read speed is %ld KiB/s\n", speed); 392 393 /* Erase all eraseblocks */ 394 pr_info("Testing erase speed\n"); 395 start_timing(); 396 err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); 397 if (err) 398 goto out; 399 stop_timing(); 400 speed = calc_speed(); 401 pr_info("erase speed is %ld KiB/s\n", speed); 402 403 /* Multi-block erase all eraseblocks */ 404 for (k = 1; k < 7; k++) { 405 blocks = 1 << k; 406 pr_info("Testing %dx multi-block erase speed\n", 407 blocks); 408 start_timing(); 409 for (i = 0; i < ebcnt; ) { 410 for (j = 0; j < blocks && (i + j) < ebcnt; j++) 411 if (bbt[i + j]) 412 break; 413 if (j < 1) { 414 i++; 415 continue; 416 } 417 err = multiblock_erase(i, j); 418 if (err) 419 goto out; 420 cond_resched(); 421 i += j; 422 } 423 stop_timing(); 424 speed = calc_speed(); 425 pr_info("%dx multi-block erase speed is %ld KiB/s\n", 426 blocks, speed); 427 } 428 pr_info("finished\n"); 429 out: 430 kfree(iobuf); 431 kfree(bbt); 432 put_mtd_device(mtd); 433 if (err) 434 pr_info("error %d occurred\n", err); 435 printk(KERN_INFO "=================================================\n"); 436 return err; 437 } 438 module_init(mtd_speedtest_init); 439 440 static void __exit mtd_speedtest_exit(void) 441 { 442 return; 443 } 444 module_exit(mtd_speedtest_exit); 445 446 MODULE_DESCRIPTION("Speed test module"); 447 MODULE_AUTHOR("Adrian Hunter"); 448 MODULE_LICENSE("GPL"); 449