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419 lines
8.4 KiB
419 lines
8.4 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2007 Nokia Corporation |
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* |
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* Test read and write speed of a MTD device. |
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* |
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* Author: Adrian Hunter <[email protected]> |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/init.h> |
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#include <linux/ktime.h> |
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#include <linux/module.h> |
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#include <linux/moduleparam.h> |
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#include <linux/err.h> |
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#include <linux/mtd/mtd.h> |
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#include <linux/slab.h> |
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#include <linux/sched.h> |
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#include <linux/random.h> |
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#include "mtd_test.h" |
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static int dev = -EINVAL; |
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module_param(dev, int, S_IRUGO); |
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MODULE_PARM_DESC(dev, "MTD device number to use"); |
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static int count; |
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module_param(count, int, S_IRUGO); |
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MODULE_PARM_DESC(count, "Maximum number of eraseblocks to use " |
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"(0 means use all)"); |
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static struct mtd_info *mtd; |
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static unsigned char *iobuf; |
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static unsigned char *bbt; |
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static int pgsize; |
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static int ebcnt; |
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static int pgcnt; |
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static int goodebcnt; |
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static ktime_t start, finish; |
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static int multiblock_erase(int ebnum, int blocks) |
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{ |
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int err; |
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struct erase_info ei; |
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loff_t addr = (loff_t)ebnum * mtd->erasesize; |
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memset(&ei, 0, sizeof(struct erase_info)); |
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ei.addr = addr; |
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ei.len = mtd->erasesize * blocks; |
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err = mtd_erase(mtd, &ei); |
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if (err) { |
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pr_err("error %d while erasing EB %d, blocks %d\n", |
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err, ebnum, blocks); |
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return err; |
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} |
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return 0; |
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} |
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static int write_eraseblock(int ebnum) |
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{ |
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loff_t addr = (loff_t)ebnum * mtd->erasesize; |
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return mtdtest_write(mtd, addr, mtd->erasesize, iobuf); |
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} |
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static int write_eraseblock_by_page(int ebnum) |
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{ |
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int i, err = 0; |
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loff_t addr = (loff_t)ebnum * mtd->erasesize; |
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void *buf = iobuf; |
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for (i = 0; i < pgcnt; i++) { |
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err = mtdtest_write(mtd, addr, pgsize, buf); |
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if (err) |
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break; |
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addr += pgsize; |
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buf += pgsize; |
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} |
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return err; |
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} |
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static int write_eraseblock_by_2pages(int ebnum) |
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{ |
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size_t sz = pgsize * 2; |
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int i, n = pgcnt / 2, err = 0; |
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loff_t addr = (loff_t)ebnum * mtd->erasesize; |
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void *buf = iobuf; |
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for (i = 0; i < n; i++) { |
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err = mtdtest_write(mtd, addr, sz, buf); |
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if (err) |
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return err; |
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addr += sz; |
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buf += sz; |
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} |
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if (pgcnt % 2) |
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err = mtdtest_write(mtd, addr, pgsize, buf); |
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return err; |
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} |
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static int read_eraseblock(int ebnum) |
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{ |
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loff_t addr = (loff_t)ebnum * mtd->erasesize; |
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return mtdtest_read(mtd, addr, mtd->erasesize, iobuf); |
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} |
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static int read_eraseblock_by_page(int ebnum) |
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{ |
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int i, err = 0; |
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loff_t addr = (loff_t)ebnum * mtd->erasesize; |
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void *buf = iobuf; |
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for (i = 0; i < pgcnt; i++) { |
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err = mtdtest_read(mtd, addr, pgsize, buf); |
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if (err) |
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break; |
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addr += pgsize; |
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buf += pgsize; |
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} |
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return err; |
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} |
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static int read_eraseblock_by_2pages(int ebnum) |
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{ |
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size_t sz = pgsize * 2; |
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int i, n = pgcnt / 2, err = 0; |
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loff_t addr = (loff_t)ebnum * mtd->erasesize; |
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void *buf = iobuf; |
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for (i = 0; i < n; i++) { |
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err = mtdtest_read(mtd, addr, sz, buf); |
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if (err) |
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return err; |
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addr += sz; |
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buf += sz; |
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} |
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if (pgcnt % 2) |
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err = mtdtest_read(mtd, addr, pgsize, buf); |
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return err; |
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} |
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static inline void start_timing(void) |
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{ |
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start = ktime_get(); |
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} |
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static inline void stop_timing(void) |
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{ |
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finish = ktime_get(); |
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} |
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static long calc_speed(void) |
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{ |
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uint64_t k; |
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long ms; |
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ms = ktime_ms_delta(finish, start); |
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if (ms == 0) |
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return 0; |
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k = (uint64_t)goodebcnt * (mtd->erasesize / 1024) * 1000; |
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do_div(k, ms); |
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return k; |
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} |
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static int __init mtd_speedtest_init(void) |
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{ |
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int err, i, blocks, j, k; |
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long speed; |
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uint64_t tmp; |
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printk(KERN_INFO "\n"); |
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printk(KERN_INFO "=================================================\n"); |
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if (dev < 0) { |
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pr_info("Please specify a valid mtd-device via module parameter\n"); |
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pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n"); |
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return -EINVAL; |
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} |
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if (count) |
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pr_info("MTD device: %d count: %d\n", dev, count); |
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else |
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pr_info("MTD device: %d\n", dev); |
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mtd = get_mtd_device(NULL, dev); |
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if (IS_ERR(mtd)) { |
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err = PTR_ERR(mtd); |
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pr_err("error: cannot get MTD device\n"); |
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return err; |
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} |
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if (mtd->writesize == 1) { |
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pr_info("not NAND flash, assume page size is 512 " |
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"bytes.\n"); |
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pgsize = 512; |
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} else |
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pgsize = mtd->writesize; |
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tmp = mtd->size; |
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do_div(tmp, mtd->erasesize); |
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ebcnt = tmp; |
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pgcnt = mtd->erasesize / pgsize; |
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pr_info("MTD device size %llu, eraseblock size %u, " |
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"page size %u, count of eraseblocks %u, pages per " |
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"eraseblock %u, OOB size %u\n", |
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(unsigned long long)mtd->size, mtd->erasesize, |
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pgsize, ebcnt, pgcnt, mtd->oobsize); |
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if (count > 0 && count < ebcnt) |
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ebcnt = count; |
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err = -ENOMEM; |
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iobuf = kmalloc(mtd->erasesize, GFP_KERNEL); |
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if (!iobuf) |
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goto out; |
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prandom_bytes(iobuf, mtd->erasesize); |
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bbt = kzalloc(ebcnt, GFP_KERNEL); |
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if (!bbt) |
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goto out; |
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err = mtdtest_scan_for_bad_eraseblocks(mtd, bbt, 0, ebcnt); |
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if (err) |
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goto out; |
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for (i = 0; i < ebcnt; i++) { |
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if (!bbt[i]) |
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goodebcnt++; |
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} |
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err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); |
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if (err) |
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goto out; |
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/* Write all eraseblocks, 1 eraseblock at a time */ |
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pr_info("testing eraseblock write speed\n"); |
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start_timing(); |
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for (i = 0; i < ebcnt; ++i) { |
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if (bbt[i]) |
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continue; |
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err = write_eraseblock(i); |
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if (err) |
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goto out; |
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err = mtdtest_relax(); |
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if (err) |
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goto out; |
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} |
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stop_timing(); |
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speed = calc_speed(); |
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pr_info("eraseblock write speed is %ld KiB/s\n", speed); |
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/* Read all eraseblocks, 1 eraseblock at a time */ |
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pr_info("testing eraseblock read speed\n"); |
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start_timing(); |
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for (i = 0; i < ebcnt; ++i) { |
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if (bbt[i]) |
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continue; |
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err = read_eraseblock(i); |
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if (err) |
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goto out; |
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err = mtdtest_relax(); |
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if (err) |
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goto out; |
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} |
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stop_timing(); |
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speed = calc_speed(); |
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pr_info("eraseblock read speed is %ld KiB/s\n", speed); |
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err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); |
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if (err) |
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goto out; |
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/* Write all eraseblocks, 1 page at a time */ |
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pr_info("testing page write speed\n"); |
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start_timing(); |
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for (i = 0; i < ebcnt; ++i) { |
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if (bbt[i]) |
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continue; |
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err = write_eraseblock_by_page(i); |
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if (err) |
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goto out; |
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err = mtdtest_relax(); |
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if (err) |
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goto out; |
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} |
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stop_timing(); |
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speed = calc_speed(); |
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pr_info("page write speed is %ld KiB/s\n", speed); |
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/* Read all eraseblocks, 1 page at a time */ |
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pr_info("testing page read speed\n"); |
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start_timing(); |
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for (i = 0; i < ebcnt; ++i) { |
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if (bbt[i]) |
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continue; |
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err = read_eraseblock_by_page(i); |
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if (err) |
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goto out; |
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err = mtdtest_relax(); |
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if (err) |
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goto out; |
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} |
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stop_timing(); |
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speed = calc_speed(); |
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pr_info("page read speed is %ld KiB/s\n", speed); |
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err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); |
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if (err) |
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goto out; |
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/* Write all eraseblocks, 2 pages at a time */ |
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pr_info("testing 2 page write speed\n"); |
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start_timing(); |
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for (i = 0; i < ebcnt; ++i) { |
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if (bbt[i]) |
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continue; |
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err = write_eraseblock_by_2pages(i); |
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if (err) |
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goto out; |
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err = mtdtest_relax(); |
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if (err) |
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goto out; |
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} |
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stop_timing(); |
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speed = calc_speed(); |
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pr_info("2 page write speed is %ld KiB/s\n", speed); |
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/* Read all eraseblocks, 2 pages at a time */ |
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pr_info("testing 2 page read speed\n"); |
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start_timing(); |
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for (i = 0; i < ebcnt; ++i) { |
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if (bbt[i]) |
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continue; |
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err = read_eraseblock_by_2pages(i); |
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if (err) |
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goto out; |
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err = mtdtest_relax(); |
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if (err) |
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goto out; |
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} |
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stop_timing(); |
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speed = calc_speed(); |
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pr_info("2 page read speed is %ld KiB/s\n", speed); |
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/* Erase all eraseblocks */ |
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pr_info("Testing erase speed\n"); |
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start_timing(); |
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err = mtdtest_erase_good_eraseblocks(mtd, bbt, 0, ebcnt); |
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if (err) |
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goto out; |
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stop_timing(); |
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speed = calc_speed(); |
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pr_info("erase speed is %ld KiB/s\n", speed); |
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/* Multi-block erase all eraseblocks */ |
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for (k = 1; k < 7; k++) { |
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blocks = 1 << k; |
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pr_info("Testing %dx multi-block erase speed\n", |
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blocks); |
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start_timing(); |
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for (i = 0; i < ebcnt; ) { |
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for (j = 0; j < blocks && (i + j) < ebcnt; j++) |
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if (bbt[i + j]) |
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break; |
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if (j < 1) { |
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i++; |
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continue; |
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} |
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err = multiblock_erase(i, j); |
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if (err) |
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goto out; |
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err = mtdtest_relax(); |
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if (err) |
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goto out; |
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i += j; |
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} |
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stop_timing(); |
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speed = calc_speed(); |
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pr_info("%dx multi-block erase speed is %ld KiB/s\n", |
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blocks, speed); |
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} |
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pr_info("finished\n"); |
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out: |
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kfree(iobuf); |
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kfree(bbt); |
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put_mtd_device(mtd); |
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if (err) |
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pr_info("error %d occurred\n", err); |
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printk(KERN_INFO "=================================================\n"); |
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return err; |
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} |
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module_init(mtd_speedtest_init); |
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static void __exit mtd_speedtest_exit(void) |
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{ |
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return; |
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} |
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module_exit(mtd_speedtest_exit); |
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MODULE_DESCRIPTION("Speed test module"); |
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MODULE_AUTHOR("Adrian Hunter"); |
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MODULE_LICENSE("GPL");
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