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![Roel Kluin](/assets/img/avatar_default.png)
Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
632 lines
15 KiB
C
632 lines
15 KiB
C
/*
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* Copyright (C) 2006-2008 Nokia Corporation
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; see the file COPYING. If not, write to the Free Software
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* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Test page read and write on MTD device.
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*
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* Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
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*/
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#include <asm/div64.h>
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#include <linux/init.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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#define PRINT_PREF KERN_INFO "mtd_pagetest: "
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static int dev;
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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 struct mtd_info *mtd;
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static unsigned char *twopages;
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static unsigned char *writebuf;
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static unsigned char *boundary;
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static unsigned char *bbt;
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static int pgsize;
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static int bufsize;
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static int ebcnt;
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static int pgcnt;
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static int errcnt;
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static unsigned long next = 1;
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static inline unsigned int simple_rand(void)
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{
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next = next * 1103515245 + 12345;
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return (unsigned int)((next / 65536) % 32768);
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}
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static inline void simple_srand(unsigned long seed)
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{
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next = seed;
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}
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static void set_random_data(unsigned char *buf, size_t len)
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{
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size_t i;
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for (i = 0; i < len; ++i)
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buf[i] = simple_rand();
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}
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static int erase_eraseblock(int ebnum)
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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 = ebnum * mtd->erasesize;
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memset(&ei, 0, sizeof(struct erase_info));
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ei.mtd = mtd;
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ei.addr = addr;
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ei.len = mtd->erasesize;
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err = mtd->erase(mtd, &ei);
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if (err) {
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printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
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return err;
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}
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if (ei.state == MTD_ERASE_FAILED) {
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printk(PRINT_PREF "some erase error occurred at EB %d\n",
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ebnum);
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return -EIO;
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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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int err = 0;
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size_t written = 0;
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loff_t addr = ebnum * mtd->erasesize;
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set_random_data(writebuf, mtd->erasesize);
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cond_resched();
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err = mtd->write(mtd, addr, mtd->erasesize, &written, writebuf);
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if (err || written != mtd->erasesize)
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printk(PRINT_PREF "error: write failed at %#llx\n",
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(long long)addr);
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return err;
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}
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static int verify_eraseblock(int ebnum)
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{
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uint32_t j;
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size_t read = 0;
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int err = 0, i;
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loff_t addr0, addrn;
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loff_t addr = ebnum * mtd->erasesize;
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addr0 = 0;
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for (i = 0; i < ebcnt && bbt[i]; ++i)
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addr0 += mtd->erasesize;
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addrn = mtd->size;
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for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++i)
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addrn -= mtd->erasesize;
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set_random_data(writebuf, mtd->erasesize);
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for (j = 0; j < pgcnt - 1; ++j, addr += pgsize) {
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/* Do a read to set the internal dataRAMs to different data */
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err = mtd->read(mtd, addr0, bufsize, &read, twopages);
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if (err == -EUCLEAN)
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err = 0;
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if (err || read != bufsize) {
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printk(PRINT_PREF "error: read failed at %#llx\n",
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(long long)addr0);
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return err;
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}
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err = mtd->read(mtd, addrn - bufsize, bufsize, &read, twopages);
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if (err == -EUCLEAN)
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err = 0;
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if (err || read != bufsize) {
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printk(PRINT_PREF "error: read failed at %#llx\n",
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(long long)(addrn - bufsize));
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return err;
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}
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memset(twopages, 0, bufsize);
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read = 0;
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err = mtd->read(mtd, addr, bufsize, &read, twopages);
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if (err == -EUCLEAN)
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err = 0;
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if (err || read != bufsize) {
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printk(PRINT_PREF "error: read failed at %#llx\n",
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(long long)addr);
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break;
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}
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if (memcmp(twopages, writebuf + (j * pgsize), bufsize)) {
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printk(PRINT_PREF "error: verify failed at %#llx\n",
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(long long)addr);
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errcnt += 1;
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}
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}
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/* Check boundary between eraseblocks */
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if (addr <= addrn - pgsize - pgsize && !bbt[ebnum + 1]) {
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unsigned long oldnext = next;
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/* Do a read to set the internal dataRAMs to different data */
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err = mtd->read(mtd, addr0, bufsize, &read, twopages);
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if (err == -EUCLEAN)
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err = 0;
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if (err || read != bufsize) {
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printk(PRINT_PREF "error: read failed at %#llx\n",
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(long long)addr0);
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return err;
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}
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err = mtd->read(mtd, addrn - bufsize, bufsize, &read, twopages);
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if (err == -EUCLEAN)
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err = 0;
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if (err || read != bufsize) {
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printk(PRINT_PREF "error: read failed at %#llx\n",
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(long long)(addrn - bufsize));
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return err;
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}
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memset(twopages, 0, bufsize);
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read = 0;
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err = mtd->read(mtd, addr, bufsize, &read, twopages);
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if (err == -EUCLEAN)
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err = 0;
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if (err || read != bufsize) {
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printk(PRINT_PREF "error: read failed at %#llx\n",
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(long long)addr);
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return err;
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}
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memcpy(boundary, writebuf + mtd->erasesize - pgsize, pgsize);
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set_random_data(boundary + pgsize, pgsize);
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if (memcmp(twopages, boundary, bufsize)) {
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printk(PRINT_PREF "error: verify failed at %#llx\n",
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(long long)addr);
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errcnt += 1;
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}
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next = oldnext;
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}
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return err;
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}
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static int crosstest(void)
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{
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size_t read = 0;
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int err = 0, i;
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loff_t addr, addr0, addrn;
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unsigned char *pp1, *pp2, *pp3, *pp4;
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printk(PRINT_PREF "crosstest\n");
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pp1 = kmalloc(pgsize * 4, GFP_KERNEL);
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if (!pp1) {
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printk(PRINT_PREF "error: cannot allocate memory\n");
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return -ENOMEM;
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}
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pp2 = pp1 + pgsize;
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pp3 = pp2 + pgsize;
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pp4 = pp3 + pgsize;
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memset(pp1, 0, pgsize * 4);
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addr0 = 0;
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for (i = 0; i < ebcnt && bbt[i]; ++i)
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addr0 += mtd->erasesize;
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addrn = mtd->size;
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for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++i)
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addrn -= mtd->erasesize;
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/* Read 2nd-to-last page to pp1 */
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read = 0;
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addr = addrn - pgsize - pgsize;
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err = mtd->read(mtd, addr, pgsize, &read, pp1);
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if (err == -EUCLEAN)
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err = 0;
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if (err || read != pgsize) {
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printk(PRINT_PREF "error: read failed at %#llx\n",
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(long long)addr);
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kfree(pp1);
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return err;
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}
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/* Read 3rd-to-last page to pp1 */
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read = 0;
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addr = addrn - pgsize - pgsize - pgsize;
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err = mtd->read(mtd, addr, pgsize, &read, pp1);
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if (err == -EUCLEAN)
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err = 0;
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if (err || read != pgsize) {
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printk(PRINT_PREF "error: read failed at %#llx\n",
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(long long)addr);
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kfree(pp1);
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return err;
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}
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/* Read first page to pp2 */
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read = 0;
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addr = addr0;
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printk(PRINT_PREF "reading page at %#llx\n", (long long)addr);
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err = mtd->read(mtd, addr, pgsize, &read, pp2);
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if (err == -EUCLEAN)
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err = 0;
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if (err || read != pgsize) {
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printk(PRINT_PREF "error: read failed at %#llx\n",
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(long long)addr);
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kfree(pp1);
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return err;
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}
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/* Read last page to pp3 */
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read = 0;
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addr = addrn - pgsize;
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printk(PRINT_PREF "reading page at %#llx\n", (long long)addr);
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err = mtd->read(mtd, addr, pgsize, &read, pp3);
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if (err == -EUCLEAN)
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err = 0;
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if (err || read != pgsize) {
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printk(PRINT_PREF "error: read failed at %#llx\n",
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(long long)addr);
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kfree(pp1);
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return err;
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}
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/* Read first page again to pp4 */
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read = 0;
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addr = addr0;
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printk(PRINT_PREF "reading page at %#llx\n", (long long)addr);
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err = mtd->read(mtd, addr, pgsize, &read, pp4);
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if (err == -EUCLEAN)
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err = 0;
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if (err || read != pgsize) {
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printk(PRINT_PREF "error: read failed at %#llx\n",
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(long long)addr);
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kfree(pp1);
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return err;
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}
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/* pp2 and pp4 should be the same */
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printk(PRINT_PREF "verifying pages read at %#llx match\n",
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(long long)addr0);
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if (memcmp(pp2, pp4, pgsize)) {
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printk(PRINT_PREF "verify failed!\n");
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errcnt += 1;
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} else if (!err)
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printk(PRINT_PREF "crosstest ok\n");
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kfree(pp1);
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return err;
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}
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static int erasecrosstest(void)
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{
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size_t read = 0, written = 0;
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int err = 0, i, ebnum, ebnum2;
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loff_t addr0;
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char *readbuf = twopages;
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printk(PRINT_PREF "erasecrosstest\n");
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ebnum = 0;
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addr0 = 0;
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for (i = 0; i < ebcnt && bbt[i]; ++i) {
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addr0 += mtd->erasesize;
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ebnum += 1;
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}
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ebnum2 = ebcnt - 1;
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while (ebnum2 && bbt[ebnum2])
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ebnum2 -= 1;
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printk(PRINT_PREF "erasing block %d\n", ebnum);
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err = erase_eraseblock(ebnum);
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if (err)
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return err;
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printk(PRINT_PREF "writing 1st page of block %d\n", ebnum);
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set_random_data(writebuf, pgsize);
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strcpy(writebuf, "There is no data like this!");
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err = mtd->write(mtd, addr0, pgsize, &written, writebuf);
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if (err || written != pgsize) {
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printk(PRINT_PREF "error: write failed at %#llx\n",
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(long long)addr0);
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return err ? err : -1;
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}
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printk(PRINT_PREF "reading 1st page of block %d\n", ebnum);
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memset(readbuf, 0, pgsize);
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err = mtd->read(mtd, addr0, pgsize, &read, readbuf);
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if (err == -EUCLEAN)
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err = 0;
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if (err || read != pgsize) {
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printk(PRINT_PREF "error: read failed at %#llx\n",
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(long long)addr0);
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return err ? err : -1;
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}
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printk(PRINT_PREF "verifying 1st page of block %d\n", ebnum);
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if (memcmp(writebuf, readbuf, pgsize)) {
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printk(PRINT_PREF "verify failed!\n");
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errcnt += 1;
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return -1;
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}
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printk(PRINT_PREF "erasing block %d\n", ebnum);
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err = erase_eraseblock(ebnum);
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if (err)
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return err;
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printk(PRINT_PREF "writing 1st page of block %d\n", ebnum);
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set_random_data(writebuf, pgsize);
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strcpy(writebuf, "There is no data like this!");
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err = mtd->write(mtd, addr0, pgsize, &written, writebuf);
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if (err || written != pgsize) {
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printk(PRINT_PREF "error: write failed at %#llx\n",
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(long long)addr0);
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return err ? err : -1;
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}
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printk(PRINT_PREF "erasing block %d\n", ebnum2);
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err = erase_eraseblock(ebnum2);
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if (err)
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return err;
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printk(PRINT_PREF "reading 1st page of block %d\n", ebnum);
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memset(readbuf, 0, pgsize);
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err = mtd->read(mtd, addr0, pgsize, &read, readbuf);
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if (err == -EUCLEAN)
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err = 0;
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if (err || read != pgsize) {
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printk(PRINT_PREF "error: read failed at %#llx\n",
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(long long)addr0);
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return err ? err : -1;
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}
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printk(PRINT_PREF "verifying 1st page of block %d\n", ebnum);
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if (memcmp(writebuf, readbuf, pgsize)) {
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printk(PRINT_PREF "verify failed!\n");
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errcnt += 1;
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return -1;
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}
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if (!err)
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printk(PRINT_PREF "erasecrosstest ok\n");
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return err;
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}
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static int erasetest(void)
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{
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size_t read = 0, written = 0;
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int err = 0, i, ebnum, ok = 1;
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loff_t addr0;
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printk(PRINT_PREF "erasetest\n");
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ebnum = 0;
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addr0 = 0;
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for (i = 0; i < ebcnt && bbt[i]; ++i) {
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addr0 += mtd->erasesize;
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ebnum += 1;
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}
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printk(PRINT_PREF "erasing block %d\n", ebnum);
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err = erase_eraseblock(ebnum);
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if (err)
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return err;
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printk(PRINT_PREF "writing 1st page of block %d\n", ebnum);
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set_random_data(writebuf, pgsize);
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err = mtd->write(mtd, addr0, pgsize, &written, writebuf);
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if (err || written != pgsize) {
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printk(PRINT_PREF "error: write failed at %#llx\n",
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(long long)addr0);
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return err ? err : -1;
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}
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printk(PRINT_PREF "erasing block %d\n", ebnum);
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err = erase_eraseblock(ebnum);
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if (err)
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return err;
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printk(PRINT_PREF "reading 1st page of block %d\n", ebnum);
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err = mtd->read(mtd, addr0, pgsize, &read, twopages);
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if (err == -EUCLEAN)
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err = 0;
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if (err || read != pgsize) {
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printk(PRINT_PREF "error: read failed at %#llx\n",
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(long long)addr0);
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return err ? err : -1;
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}
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printk(PRINT_PREF "verifying 1st page of block %d is all 0xff\n",
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ebnum);
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for (i = 0; i < pgsize; ++i)
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if (twopages[i] != 0xff) {
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printk(PRINT_PREF "verifying all 0xff failed at %d\n",
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i);
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errcnt += 1;
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ok = 0;
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break;
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}
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if (ok && !err)
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printk(PRINT_PREF "erasetest ok\n");
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return err;
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}
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static int is_block_bad(int ebnum)
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{
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loff_t addr = ebnum * mtd->erasesize;
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int ret;
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ret = mtd->block_isbad(mtd, addr);
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if (ret)
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printk(PRINT_PREF "block %d is bad\n", ebnum);
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return ret;
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}
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static int scan_for_bad_eraseblocks(void)
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{
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int i, bad = 0;
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bbt = kzalloc(ebcnt, GFP_KERNEL);
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if (!bbt) {
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printk(PRINT_PREF "error: cannot allocate memory\n");
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return -ENOMEM;
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}
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printk(PRINT_PREF "scanning for bad eraseblocks\n");
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for (i = 0; i < ebcnt; ++i) {
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bbt[i] = is_block_bad(i) ? 1 : 0;
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if (bbt[i])
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bad += 1;
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cond_resched();
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}
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printk(PRINT_PREF "scanned %d eraseblocks, %d are bad\n", i, bad);
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return 0;
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}
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|
static int __init mtd_pagetest_init(void)
|
|
{
|
|
int err = 0;
|
|
uint64_t tmp;
|
|
uint32_t i;
|
|
|
|
printk(KERN_INFO "\n");
|
|
printk(KERN_INFO "=================================================\n");
|
|
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->type != MTD_NANDFLASH) {
|
|
printk(PRINT_PREF "this test requires NAND flash\n");
|
|
goto out;
|
|
}
|
|
|
|
tmp = mtd->size;
|
|
do_div(tmp, mtd->erasesize);
|
|
ebcnt = tmp;
|
|
pgcnt = mtd->erasesize / mtd->writesize;
|
|
pgsize = mtd->writesize;
|
|
|
|
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);
|
|
|
|
err = -ENOMEM;
|
|
bufsize = pgsize * 2;
|
|
writebuf = kmalloc(mtd->erasesize, GFP_KERNEL);
|
|
if (!writebuf) {
|
|
printk(PRINT_PREF "error: cannot allocate memory\n");
|
|
goto out;
|
|
}
|
|
twopages = kmalloc(bufsize, GFP_KERNEL);
|
|
if (!twopages) {
|
|
printk(PRINT_PREF "error: cannot allocate memory\n");
|
|
goto out;
|
|
}
|
|
boundary = kmalloc(bufsize, GFP_KERNEL);
|
|
if (!boundary) {
|
|
printk(PRINT_PREF "error: cannot allocate memory\n");
|
|
goto out;
|
|
}
|
|
|
|
err = scan_for_bad_eraseblocks();
|
|
if (err)
|
|
goto out;
|
|
|
|
/* Erase all eraseblocks */
|
|
printk(PRINT_PREF "erasing whole device\n");
|
|
for (i = 0; i < ebcnt; ++i) {
|
|
if (bbt[i])
|
|
continue;
|
|
err = erase_eraseblock(i);
|
|
if (err)
|
|
goto out;
|
|
cond_resched();
|
|
}
|
|
printk(PRINT_PREF "erased %u eraseblocks\n", i);
|
|
|
|
/* Write all eraseblocks */
|
|
simple_srand(1);
|
|
printk(PRINT_PREF "writing whole device\n");
|
|
for (i = 0; i < ebcnt; ++i) {
|
|
if (bbt[i])
|
|
continue;
|
|
err = write_eraseblock(i);
|
|
if (err)
|
|
goto out;
|
|
if (i % 256 == 0)
|
|
printk(PRINT_PREF "written up to eraseblock %u\n", i);
|
|
cond_resched();
|
|
}
|
|
printk(PRINT_PREF "written %u eraseblocks\n", i);
|
|
|
|
/* Check all eraseblocks */
|
|
simple_srand(1);
|
|
printk(PRINT_PREF "verifying all eraseblocks\n");
|
|
for (i = 0; i < ebcnt; ++i) {
|
|
if (bbt[i])
|
|
continue;
|
|
err = verify_eraseblock(i);
|
|
if (err)
|
|
goto out;
|
|
if (i % 256 == 0)
|
|
printk(PRINT_PREF "verified up to eraseblock %u\n", i);
|
|
cond_resched();
|
|
}
|
|
printk(PRINT_PREF "verified %u eraseblocks\n", i);
|
|
|
|
err = crosstest();
|
|
if (err)
|
|
goto out;
|
|
|
|
err = erasecrosstest();
|
|
if (err)
|
|
goto out;
|
|
|
|
err = erasetest();
|
|
if (err)
|
|
goto out;
|
|
|
|
printk(PRINT_PREF "finished with %d errors\n", errcnt);
|
|
out:
|
|
|
|
kfree(bbt);
|
|
kfree(boundary);
|
|
kfree(twopages);
|
|
kfree(writebuf);
|
|
put_mtd_device(mtd);
|
|
if (err)
|
|
printk(PRINT_PREF "error %d occurred\n", err);
|
|
printk(KERN_INFO "=================================================\n");
|
|
return err;
|
|
}
|
|
module_init(mtd_pagetest_init);
|
|
|
|
static void __exit mtd_pagetest_exit(void)
|
|
{
|
|
return;
|
|
}
|
|
module_exit(mtd_pagetest_exit);
|
|
|
|
MODULE_DESCRIPTION("NAND page test");
|
|
MODULE_AUTHOR("Adrian Hunter");
|
|
MODULE_LICENSE("GPL");
|