| /* |
| * Copyright (C) 2007 Nokia Corporation |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 as published by |
| * the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program; see the file COPYING. If not, write to the Free Software |
| * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| * |
| * Test read and write speed of a MTD device. |
| * |
| * Author: Adrian Hunter <adrian.hunter@nokia.com> |
| */ |
| |
| #include <linux/init.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> |
| |
| #define PRINT_PREF KERN_INFO "mtd_speedtest: " |
| |
| 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 struct timeval start, finish; |
| static unsigned long next = 1; |
| |
| static inline unsigned int simple_rand(void) |
| { |
| next = next * 1103515245 + 12345; |
| return (unsigned int)((next / 65536) % 32768); |
| } |
| |
| static inline void simple_srand(unsigned long seed) |
| { |
| next = seed; |
| } |
| |
| static void set_random_data(unsigned char *buf, size_t len) |
| { |
| size_t i; |
| |
| for (i = 0; i < len; ++i) |
| buf[i] = simple_rand(); |
| } |
| |
| static int erase_eraseblock(int ebnum) |
| { |
| int err; |
| struct erase_info ei; |
| loff_t addr = ebnum * mtd->erasesize; |
| |
| memset(&ei, 0, sizeof(struct erase_info)); |
| ei.mtd = mtd; |
| ei.addr = addr; |
| ei.len = mtd->erasesize; |
| |
| err = mtd->erase(mtd, &ei); |
| if (err) { |
| printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum); |
| return err; |
| } |
| |
| if (ei.state == MTD_ERASE_FAILED) { |
| printk(PRINT_PREF "some erase error occurred at EB %d\n", |
| ebnum); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| static int multiblock_erase(int ebnum, int blocks) |
| { |
| int err; |
| struct erase_info ei; |
| loff_t addr = ebnum * mtd->erasesize; |
| |
| memset(&ei, 0, sizeof(struct erase_info)); |
| ei.mtd = mtd; |
| ei.addr = addr; |
| ei.len = mtd->erasesize * blocks; |
| |
| err = mtd->erase(mtd, &ei); |
| if (err) { |
| printk(PRINT_PREF "error %d while erasing EB %d, blocks %d\n", |
| err, ebnum, blocks); |
| return err; |
| } |
| |
| if (ei.state == MTD_ERASE_FAILED) { |
| printk(PRINT_PREF "some erase error occurred at EB %d," |
| "blocks %d\n", ebnum, blocks); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| static int erase_whole_device(void) |
| { |
| int err; |
| unsigned int i; |
| |
| for (i = 0; i < ebcnt; ++i) { |
| if (bbt[i]) |
| continue; |
| err = erase_eraseblock(i); |
| if (err) |
| return err; |
| cond_resched(); |
| } |
| return 0; |
| } |
| |
| static int write_eraseblock(int ebnum) |
| { |
| size_t written = 0; |
| int err = 0; |
| loff_t addr = ebnum * mtd->erasesize; |
| |
| err = mtd->write(mtd, addr, mtd->erasesize, &written, iobuf); |
| if (err || written != mtd->erasesize) { |
| printk(PRINT_PREF "error: write failed at %#llx\n", addr); |
| if (!err) |
| err = -EINVAL; |
| } |
| |
| return err; |
| } |
| |
| static int write_eraseblock_by_page(int ebnum) |
| { |
| size_t written = 0; |
| int i, err = 0; |
| loff_t addr = ebnum * mtd->erasesize; |
| void *buf = iobuf; |
| |
| for (i = 0; i < pgcnt; i++) { |
| err = mtd->write(mtd, addr, pgsize, &written, buf); |
| if (err || written != pgsize) { |
| printk(PRINT_PREF "error: write failed at %#llx\n", |
| addr); |
| if (!err) |
| err = -EINVAL; |
| break; |
| } |
| addr += pgsize; |
| buf += pgsize; |
| } |
| |
| return err; |
| } |
| |
| static int write_eraseblock_by_2pages(int ebnum) |
| { |
| size_t written = 0, sz = pgsize * 2; |
| int i, n = pgcnt / 2, err = 0; |
| loff_t addr = ebnum * mtd->erasesize; |
| void *buf = iobuf; |
| |
| for (i = 0; i < n; i++) { |
| err = mtd->write(mtd, addr, sz, &written, buf); |
| if (err || written != sz) { |
| printk(PRINT_PREF "error: write failed at %#llx\n", |
| addr); |
| if (!err) |
| err = -EINVAL; |
| return err; |
| } |
| addr += sz; |
| buf += sz; |
| } |
| if (pgcnt % 2) { |
| err = mtd->write(mtd, addr, pgsize, &written, buf); |
| if (err || written != pgsize) { |
| printk(PRINT_PREF "error: write failed at %#llx\n", |
| addr); |
| if (!err) |
| err = -EINVAL; |
| } |
| } |
| |
| return err; |
| } |
| |
| static int read_eraseblock(int ebnum) |
| { |
| size_t read = 0; |
| int err = 0; |
| loff_t addr = ebnum * mtd->erasesize; |
| |
| err = mtd->read(mtd, addr, mtd->erasesize, &read, iobuf); |
| /* Ignore corrected ECC errors */ |
| if (mtd_is_bitflip(err)) |
| err = 0; |
| if (err || read != mtd->erasesize) { |
| printk(PRINT_PREF "error: read failed at %#llx\n", addr); |
| if (!err) |
| err = -EINVAL; |
| } |
| |
| return err; |
| } |
| |
| static int read_eraseblock_by_page(int ebnum) |
| { |
| size_t read = 0; |
| int i, err = 0; |
| loff_t addr = ebnum * mtd->erasesize; |
| void *buf = iobuf; |
| |
| for (i = 0; i < pgcnt; i++) { |
| err = mtd->read(mtd, addr, pgsize, &read, buf); |
| /* Ignore corrected ECC errors */ |
| if (mtd_is_bitflip(err)) |
| err = 0; |
| if (err || read != pgsize) { |
| printk(PRINT_PREF "error: read failed at %#llx\n", |
| addr); |
| if (!err) |
| err = -EINVAL; |
| break; |
| } |
| addr += pgsize; |
| buf += pgsize; |
| } |
| |
| return err; |
| } |
| |
| static int read_eraseblock_by_2pages(int ebnum) |
| { |
| size_t read = 0, sz = pgsize * 2; |
| int i, n = pgcnt / 2, err = 0; |
| loff_t addr = ebnum * mtd->erasesize; |
| void *buf = iobuf; |
| |
| for (i = 0; i < n; i++) { |
| err = mtd->read(mtd, addr, sz, &read, buf); |
| /* Ignore corrected ECC errors */ |
| if (mtd_is_bitflip(err)) |
| err = 0; |
| if (err || read != sz) { |
| printk(PRINT_PREF "error: read failed at %#llx\n", |
| addr); |
| if (!err) |
| err = -EINVAL; |
| return err; |
| } |
| addr += sz; |
| buf += sz; |
| } |
| if (pgcnt % 2) { |
| err = mtd->read(mtd, addr, pgsize, &read, buf); |
| /* Ignore corrected ECC errors */ |
| if (mtd_is_bitflip(err)) |
| err = 0; |
| if (err || read != pgsize) { |
| printk(PRINT_PREF "error: read failed at %#llx\n", |
| addr); |
| if (!err) |
| err = -EINVAL; |
| } |
| } |
| |
| return err; |
| } |
| |
| static int is_block_bad(int ebnum) |
| { |
| loff_t addr = ebnum * mtd->erasesize; |
| int ret; |
| |
| ret = mtd->block_isbad(mtd, addr); |
| if (ret) |
| printk(PRINT_PREF "block %d is bad\n", ebnum); |
| return ret; |
| } |
| |
| static inline void start_timing(void) |
| { |
| do_gettimeofday(&start); |
| } |
| |
| static inline void stop_timing(void) |
| { |
| do_gettimeofday(&finish); |
| } |
| |
| static long calc_speed(void) |
| { |
| uint64_t k; |
| long ms; |
| |
| ms = (finish.tv_sec - start.tv_sec) * 1000 + |
| (finish.tv_usec - start.tv_usec) / 1000; |
| if (ms == 0) |
| return 0; |
| k = goodebcnt * (mtd->erasesize / 1024) * 1000; |
| do_div(k, ms); |
| return k; |
| } |
| |
| static int scan_for_bad_eraseblocks(void) |
| { |
| int i, bad = 0; |
| |
| bbt = kzalloc(ebcnt, GFP_KERNEL); |
| if (!bbt) { |
| printk(PRINT_PREF "error: cannot allocate memory\n"); |
| return -ENOMEM; |
| } |
| |
| /* NOR flash does not implement block_isbad */ |
| if (mtd->block_isbad == NULL) |
| goto out; |
| |
| printk(PRINT_PREF "scanning for bad eraseblocks\n"); |
| for (i = 0; i < ebcnt; ++i) { |
| bbt[i] = is_block_bad(i) ? 1 : 0; |
| if (bbt[i]) |
| bad += 1; |
| cond_resched(); |
| } |
| printk(PRINT_PREF "scanned %d eraseblocks, %d are bad\n", i, bad); |
| out: |
| goodebcnt = ebcnt - bad; |
| return 0; |
| } |
| |
| 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) { |
| printk(PRINT_PREF "Please specify a valid mtd-device via module paramter\n"); |
| printk(KERN_CRIT "CAREFUL: This test wipes all data on the specified MTD device!\n"); |
| return -EINVAL; |
| } |
| |
| if (count) |
| printk(PRINT_PREF "MTD device: %d count: %d\n", dev, count); |
| else |
| printk(PRINT_PREF "MTD device: %d\n", dev); |
| |
| mtd = get_mtd_device(NULL, dev); |
| if (IS_ERR(mtd)) { |
| err = PTR_ERR(mtd); |
| printk(PRINT_PREF "error: cannot get MTD device\n"); |
| return err; |
| } |
| |
| if (mtd->writesize == 1) { |
| printk(PRINT_PREF "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; |
| |
| printk(PRINT_PREF "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) { |
| printk(PRINT_PREF "error: cannot allocate memory\n"); |
| goto out; |
| } |
| |
| simple_srand(1); |
| set_random_data(iobuf, mtd->erasesize); |
| |
| err = scan_for_bad_eraseblocks(); |
| if (err) |
| goto out; |
| |
| err = erase_whole_device(); |
| if (err) |
| goto out; |
| |
| /* Write all eraseblocks, 1 eraseblock at a time */ |
| printk(PRINT_PREF "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; |
| cond_resched(); |
| } |
| stop_timing(); |
| speed = calc_speed(); |
| printk(PRINT_PREF "eraseblock write speed is %ld KiB/s\n", speed); |
| |
| /* Read all eraseblocks, 1 eraseblock at a time */ |
| printk(PRINT_PREF "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; |
| cond_resched(); |
| } |
| stop_timing(); |
| speed = calc_speed(); |
| printk(PRINT_PREF "eraseblock read speed is %ld KiB/s\n", speed); |
| |
| err = erase_whole_device(); |
| if (err) |
| goto out; |
| |
| /* Write all eraseblocks, 1 page at a time */ |
| printk(PRINT_PREF "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; |
| cond_resched(); |
| } |
| stop_timing(); |
| speed = calc_speed(); |
| printk(PRINT_PREF "page write speed is %ld KiB/s\n", speed); |
| |
| /* Read all eraseblocks, 1 page at a time */ |
| printk(PRINT_PREF "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; |
| cond_resched(); |
| } |
| stop_timing(); |
| speed = calc_speed(); |
| printk(PRINT_PREF "page read speed is %ld KiB/s\n", speed); |
| |
| err = erase_whole_device(); |
| if (err) |
| goto out; |
| |
| /* Write all eraseblocks, 2 pages at a time */ |
| printk(PRINT_PREF "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; |
| cond_resched(); |
| } |
| stop_timing(); |
| speed = calc_speed(); |
| printk(PRINT_PREF "2 page write speed is %ld KiB/s\n", speed); |
| |
| /* Read all eraseblocks, 2 pages at a time */ |
| printk(PRINT_PREF "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; |
| cond_resched(); |
| } |
| stop_timing(); |
| speed = calc_speed(); |
| printk(PRINT_PREF "2 page read speed is %ld KiB/s\n", speed); |
| |
| /* Erase all eraseblocks */ |
| printk(PRINT_PREF "Testing erase speed\n"); |
| start_timing(); |
| for (i = 0; i < ebcnt; ++i) { |
| if (bbt[i]) |
| continue; |
| err = erase_eraseblock(i); |
| if (err) |
| goto out; |
| cond_resched(); |
| } |
| stop_timing(); |
| speed = calc_speed(); |
| printk(PRINT_PREF "erase speed is %ld KiB/s\n", speed); |
| |
| /* Multi-block erase all eraseblocks */ |
| for (k = 1; k < 7; k++) { |
| blocks = 1 << k; |
| printk(PRINT_PREF "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; |
| cond_resched(); |
| i += j; |
| } |
| stop_timing(); |
| speed = calc_speed(); |
| printk(PRINT_PREF "%dx multi-block erase speed is %ld KiB/s\n", |
| blocks, speed); |
| } |
| printk(PRINT_PREF "finished\n"); |
| out: |
| kfree(iobuf); |
| kfree(bbt); |
| put_mtd_device(mtd); |
| if (err) |
| printk(PRINT_PREF "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"); |