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@@ -0,0 +1,530 @@
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+/*
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+ * Copyright (C) 2006-2008 Artem Bityutskiy
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+ * Copyright (C) 2006-2008 Jarkko Lavinen
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+ * Copyright (C) 2006-2008 Adrian Hunter
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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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+ * Authors: Artem Bityutskiy, Jarkko Lavinen, Adria Hunter
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+ *
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+ * WARNING: this test program may kill your flash and your device. Do not
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+ * use it unless you know what you do. Authors are not responsible for any
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+ * damage caused by this program.
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+ */
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+
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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/sched.h>
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+
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+#define PRINT_PREF KERN_INFO "mtd_torturetest: "
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+#define RETRIES 3
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+
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+static int eb = 8;
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+module_param(eb, int, S_IRUGO);
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+MODULE_PARM_DESC(eb, "eraseblock number within the selected MTD device");
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+
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+static int ebcnt = 32;
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+module_param(ebcnt, int, S_IRUGO);
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+MODULE_PARM_DESC(ebcnt, "number of consecutive eraseblocks to torture");
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+
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+static int pgcnt;
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+module_param(pgcnt, int, S_IRUGO);
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+MODULE_PARM_DESC(pgcnt, "number of pages per eraseblock to torture (0 => all)");
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+
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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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+
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+static int gran = 512;
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+module_param(gran, int, S_IRUGO);
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+MODULE_PARM_DESC(gran, "how often the status information should be printed");
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+
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+static int check = 1;
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+module_param(check, int, S_IRUGO);
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+MODULE_PARM_DESC(check, "if the written data should be checked");
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+
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+static unsigned int cycles_count;
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+module_param(cycles_count, uint, S_IRUGO);
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+MODULE_PARM_DESC(cycles_count, "how many erase cycles to do "
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+ "(infinite by default)");
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+
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+static struct mtd_info *mtd;
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+
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+/* This buffer contains 0x555555...0xAAAAAA... pattern */
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+static unsigned char *patt_5A5;
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+/* This buffer contains 0xAAAAAA...0x555555... pattern */
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+static unsigned char *patt_A5A;
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+/* This buffer contains all 0xFF bytes */
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+static unsigned char *patt_FF;
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+/* This a temporary buffer is use when checking data */
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+static unsigned char *check_buf;
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+/* How many erase cycles were done */
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+static unsigned int erase_cycles;
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+
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+static int pgsize;
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+static struct timeval start, finish;
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+
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+static void report_corrupt(unsigned char *read, unsigned char *written);
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+
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+static inline void start_timing(void)
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+{
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+ do_gettimeofday(&start);
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+}
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+
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+static inline void stop_timing(void)
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+{
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+ do_gettimeofday(&finish);
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+}
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+
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+/*
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+ * Erase eraseblock number @ebnum.
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+ */
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+static inline 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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+
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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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+
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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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+
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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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+
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+ return 0;
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+}
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+
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+/*
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+ * Check that the contents of eraseblock number @enbum is equivalent to the
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+ * @buf buffer.
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+ */
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+static inline int check_eraseblock(int ebnum, unsigned char *buf)
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+{
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+ int err, retries = 0;
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+ size_t read = 0;
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+ loff_t addr = ebnum * mtd->erasesize;
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+ size_t len = mtd->erasesize;
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+
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+ if (pgcnt) {
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+ addr = (ebnum + 1) * mtd->erasesize - pgcnt * pgsize;
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+ len = pgcnt * pgsize;
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+ }
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+
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+retry:
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+ err = mtd->read(mtd, addr, len, &read, check_buf);
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+ if (err == -EUCLEAN)
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+ printk(PRINT_PREF "single bit flip occurred at EB %d "
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+ "MTD reported that it was fixed.\n", ebnum);
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+ else if (err) {
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+ printk(PRINT_PREF "error %d while reading EB %d, "
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+ "read %zd\n", err, ebnum, read);
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+ return err;
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+ }
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+
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+ if (read != len) {
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+ printk(PRINT_PREF "failed to read %zd bytes from EB %d, "
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+ "read only %zd, but no error reported\n",
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+ len, ebnum, read);
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+ return -EIO;
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+ }
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+
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+ if (memcmp(buf, check_buf, len)) {
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+ printk(PRINT_PREF "read wrong data from EB %d\n", ebnum);
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+ report_corrupt(check_buf, buf);
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+
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+ if (retries++ < RETRIES) {
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+ /* Try read again */
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+ yield();
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+ printk(PRINT_PREF "re-try reading data from EB %d\n",
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+ ebnum);
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+ goto retry;
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+ } else {
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+ printk(PRINT_PREF "retried %d times, still errors, "
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+ "give-up\n", RETRIES);
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+ return -EINVAL;
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+ }
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+ }
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+
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+ if (retries != 0)
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+ printk(PRINT_PREF "only attempt number %d was OK (!!!)\n",
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+ retries);
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+
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+ return 0;
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+}
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+
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+static inline int write_pattern(int ebnum, void *buf)
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+{
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+ int err;
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+ size_t written = 0;
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+ loff_t addr = ebnum * mtd->erasesize;
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+ size_t len = mtd->erasesize;
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+
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+ if (pgcnt) {
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+ addr = (ebnum + 1) * mtd->erasesize - pgcnt * pgsize;
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+ len = pgcnt * pgsize;
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+ }
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+ err = mtd->write(mtd, addr, len, &written, buf);
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+ if (err) {
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+ printk(PRINT_PREF "error %d while writing EB %d, written %zd"
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+ " bytes\n", err, ebnum, written);
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+ return err;
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+ }
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+ if (written != len) {
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+ printk(PRINT_PREF "written only %zd bytes of %zd, but no error"
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+ " reported\n", written, len);
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+ return -EIO;
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+ }
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+
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+ return 0;
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+}
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+
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+static int __init tort_init(void)
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+{
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+ int err = 0, i, infinite = !cycles_count;
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+ int bad_ebs[ebcnt];
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+
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+ printk(KERN_INFO "\n");
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+ printk(KERN_INFO "=================================================\n");
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+ printk(PRINT_PREF "Warning: this program is trying to wear out your "
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+ "flash, stop it if this is not wanted.\n");
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+ printk(PRINT_PREF "MTD device: %d\n", dev);
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+ printk(PRINT_PREF "torture %d eraseblocks (%d-%d) of mtd%d\n",
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+ ebcnt, eb, eb + ebcnt - 1, dev);
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+ if (pgcnt)
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+ printk(PRINT_PREF "torturing just %d pages per eraseblock\n",
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+ pgcnt);
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+ printk(PRINT_PREF "write verify %s\n", check ? "enabled" : "disabled");
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+
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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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+ printk(PRINT_PREF "error: cannot get MTD device\n");
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+ return err;
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+ }
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+
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+ if (mtd->writesize == 1) {
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+ printk(PRINT_PREF "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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+
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+ if (pgcnt && (pgcnt > mtd->erasesize / pgsize || pgcnt < 0)) {
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+ printk(PRINT_PREF "error: invalid pgcnt value %d\n", pgcnt);
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+ goto out_mtd;
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+ }
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+
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+ err = -ENOMEM;
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+ patt_5A5 = kmalloc(mtd->erasesize, GFP_KERNEL);
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+ if (!patt_5A5) {
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+ printk(PRINT_PREF "error: cannot allocate memory\n");
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+ goto out_mtd;
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+ }
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+
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+ patt_A5A = kmalloc(mtd->erasesize, GFP_KERNEL);
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+ if (!patt_A5A) {
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+ printk(PRINT_PREF "error: cannot allocate memory\n");
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+ goto out_patt_5A5;
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+ }
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+
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+ patt_FF = kmalloc(mtd->erasesize, GFP_KERNEL);
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+ if (!patt_FF) {
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+ printk(PRINT_PREF "error: cannot allocate memory\n");
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+ goto out_patt_A5A;
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+ }
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+
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+ check_buf = kmalloc(mtd->erasesize, GFP_KERNEL);
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+ if (!check_buf) {
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+ printk(PRINT_PREF "error: cannot allocate memory\n");
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+ goto out_patt_FF;
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+ }
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+
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+ err = 0;
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+
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+ /* Initialize patterns */
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+ memset(patt_FF, 0xFF, mtd->erasesize);
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+ for (i = 0; i < mtd->erasesize / pgsize; i++) {
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+ if (!(i & 1)) {
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+ memset(patt_5A5 + i * pgsize, 0x55, pgsize);
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+ memset(patt_A5A + i * pgsize, 0xAA, pgsize);
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+ } else {
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+ memset(patt_5A5 + i * pgsize, 0xAA, pgsize);
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+ memset(patt_A5A + i * pgsize, 0x55, pgsize);
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+ }
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+ }
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+
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+ /*
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+ * Check if there is a bad eraseblock among those we are going to test.
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+ */
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+ memset(&bad_ebs[0], 0, sizeof(int) * ebcnt);
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+ if (mtd->block_isbad) {
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+ for (i = eb; i < eb + ebcnt; i++) {
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+ err = mtd->block_isbad(mtd,
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+ (loff_t)i * mtd->erasesize);
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+
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+ if (err < 0) {
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+ printk(PRINT_PREF "block_isbad() returned %d "
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+ "for EB %d\n", err, i);
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+ goto out;
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+ }
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+
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+ if (err) {
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+ printk("EB %d is bad. Skip it.\n", i);
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+ bad_ebs[i - eb] = 1;
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+ }
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+ }
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+ }
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+
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+ start_timing();
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+ while (1) {
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+ int i;
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+ void *patt;
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+
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+ /* Erase all eraseblocks */
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+ for (i = eb; i < eb + ebcnt; i++) {
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+ if (bad_ebs[i - eb])
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+ continue;
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+ err = erase_eraseblock(i);
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+ if (err)
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+ goto out;
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+ cond_resched();
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+ }
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+
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+ /* Check if the eraseblocks contain only 0xFF bytes */
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+ if (check) {
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+ for (i = eb; i < eb + ebcnt; i++) {
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+ if (bad_ebs[i - eb])
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+ continue;
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+ err = check_eraseblock(i, patt_FF);
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+ if (err) {
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+ printk(PRINT_PREF "verify failed"
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+ " for 0xFF... pattern\n");
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+ goto out;
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+ }
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+ cond_resched();
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+ }
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+ }
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+
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+ /* Write the pattern */
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+ for (i = eb; i < eb + ebcnt; i++) {
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+ if (bad_ebs[i - eb])
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+ continue;
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+ if ((eb + erase_cycles) & 1)
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+ patt = patt_5A5;
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+ else
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+ patt = patt_A5A;
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+ err = write_pattern(i, patt);
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+ if (err)
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+ goto out;
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+ cond_resched();
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+ }
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+
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+ /* Verify what we wrote */
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+ if (check) {
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+ for (i = eb; i < eb + ebcnt; i++) {
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+ if (bad_ebs[i - eb])
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+ continue;
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+ if ((eb + erase_cycles) & 1)
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+ patt = patt_5A5;
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+ else
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+ patt = patt_A5A;
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+ err = check_eraseblock(i, patt);
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+ if (err) {
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+ printk(PRINT_PREF "verify failed for %s"
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+ " pattern\n",
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+ ((eb + erase_cycles) & 1) ?
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+ "0x55AA55..." : "0xAA55AA...");
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+ goto out;
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+ }
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+ cond_resched();
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+ }
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+ }
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+
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+ erase_cycles += 1;
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+
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+ if (erase_cycles % gran == 0) {
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+ long ms;
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+
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+ stop_timing();
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+ ms = (finish.tv_sec - start.tv_sec) * 1000 +
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+ (finish.tv_usec - start.tv_usec) / 1000;
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+ printk(PRINT_PREF "%08u erase cycles done, took %lu "
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+ "milliseconds (%lu seconds)\n",
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+ erase_cycles, ms, ms / 1000);
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+ start_timing();
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+ }
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+
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+ if (!infinite && --cycles_count == 0)
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+ break;
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+ }
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+out:
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+
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+ printk(PRINT_PREF "finished after %u erase cycles\n",
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+ erase_cycles);
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+ kfree(check_buf);
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+out_patt_FF:
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+ kfree(patt_FF);
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+out_patt_A5A:
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+ kfree(patt_A5A);
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+out_patt_5A5:
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+ kfree(patt_5A5);
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+out_mtd:
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+ put_mtd_device(mtd);
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+ if (err)
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+ printk(PRINT_PREF "error %d occurred during torturing\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(tort_init);
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+
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+static void __exit tort_exit(void)
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+{
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+ return;
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+}
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+module_exit(tort_exit);
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+
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+static int countdiffs(unsigned char *buf, unsigned char *check_buf,
|
|
|
+ unsigned offset, unsigned len, unsigned *bytesp,
|
|
|
+ unsigned *bitsp);
|
|
|
+static void print_bufs(unsigned char *read, unsigned char *written, int start,
|
|
|
+ int len);
|
|
|
+
|
|
|
+/*
|
|
|
+ * Report the detailed information about how the read EB differs from what was
|
|
|
+ * written.
|
|
|
+ */
|
|
|
+static void report_corrupt(unsigned char *read, unsigned char *written)
|
|
|
+{
|
|
|
+ int i;
|
|
|
+ int bytes, bits, pages, first;
|
|
|
+ int offset, len;
|
|
|
+ size_t check_len = mtd->erasesize;
|
|
|
+
|
|
|
+ if (pgcnt)
|
|
|
+ check_len = pgcnt * pgsize;
|
|
|
+
|
|
|
+ bytes = bits = pages = 0;
|
|
|
+ for (i = 0; i < check_len; i += pgsize)
|
|
|
+ if (countdiffs(written, read, i, pgsize, &bytes,
|
|
|
+ &bits) >= 0)
|
|
|
+ pages++;
|
|
|
+
|
|
|
+ printk(PRINT_PREF "verify fails on %d pages, %d bytes/%d bits\n",
|
|
|
+ pages, bytes, bits);
|
|
|
+ printk(PRINT_PREF "The following is a list of all differences between"
|
|
|
+ " what was read from flash and what was expected\n");
|
|
|
+
|
|
|
+ for (i = 0; i < check_len; i += pgsize) {
|
|
|
+ cond_resched();
|
|
|
+ bytes = bits = 0;
|
|
|
+ first = countdiffs(written, read, i, pgsize, &bytes,
|
|
|
+ &bits);
|
|
|
+ if (first < 0)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ printk("-------------------------------------------------------"
|
|
|
+ "----------------------------------\n");
|
|
|
+
|
|
|
+ printk(PRINT_PREF "Page %d has %d bytes/%d bits failing verify,"
|
|
|
+ " starting at offset 0x%x\n",
|
|
|
+ (mtd->erasesize - check_len + i) / pgsize,
|
|
|
+ bytes, bits, first);
|
|
|
+
|
|
|
+ offset = first & ~0x7;
|
|
|
+ len = ((first + bytes) | 0x7) + 1 - offset;
|
|
|
+
|
|
|
+ print_bufs(read, written, offset, len);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void print_bufs(unsigned char *read, unsigned char *written, int start,
|
|
|
+ int len)
|
|
|
+{
|
|
|
+ int i = 0, j1, j2;
|
|
|
+ char *diff;
|
|
|
+
|
|
|
+ printk("Offset Read Written\n");
|
|
|
+ while (i < len) {
|
|
|
+ printk("0x%08x: ", start + i);
|
|
|
+ diff = " ";
|
|
|
+ for (j1 = 0; j1 < 8 && i + j1 < len; j1++) {
|
|
|
+ printk(" %02x", read[start + i + j1]);
|
|
|
+ if (read[start + i + j1] != written[start + i + j1])
|
|
|
+ diff = "***";
|
|
|
+ }
|
|
|
+
|
|
|
+ while (j1 < 8) {
|
|
|
+ printk(" ");
|
|
|
+ j1 += 1;
|
|
|
+ }
|
|
|
+
|
|
|
+ printk(" %s ", diff);
|
|
|
+
|
|
|
+ for (j2 = 0; j2 < 8 && i + j2 < len; j2++)
|
|
|
+ printk(" %02x", written[start + i + j2]);
|
|
|
+ printk("\n");
|
|
|
+ i += 8;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * Count the number of differing bytes and bits and return the first differing
|
|
|
+ * offset.
|
|
|
+ */
|
|
|
+static int countdiffs(unsigned char *buf, unsigned char *check_buf,
|
|
|
+ unsigned offset, unsigned len, unsigned *bytesp,
|
|
|
+ unsigned *bitsp)
|
|
|
+{
|
|
|
+ unsigned i, bit;
|
|
|
+ int first = -1;
|
|
|
+
|
|
|
+ for (i = offset; i < offset + len; i++)
|
|
|
+ if (buf[i] != check_buf[i]) {
|
|
|
+ first = i;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ while (i < offset + len) {
|
|
|
+ if (buf[i] != check_buf[i]) {
|
|
|
+ (*bytesp)++;
|
|
|
+ bit = 1;
|
|
|
+ while (bit < 256) {
|
|
|
+ if ((buf[i] & bit) != (check_buf[i] & bit))
|
|
|
+ (*bitsp)++;
|
|
|
+ bit <<= 1;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ i++;
|
|
|
+ }
|
|
|
+
|
|
|
+ return first;
|
|
|
+}
|
|
|
+
|
|
|
+MODULE_DESCRIPTION("Eraseblock torturing module");
|
|
|
+MODULE_AUTHOR("Artem Bityutskiy, Jarkko Lavinen, Adrian Hunter");
|
|
|
+MODULE_LICENSE("GPL");
|