obj-$(CONFIG_MTD_TESTS) += mtd_torturetest.o
obj-$(CONFIG_MTD_TESTS) += mtd_nandecctest.o
obj-$(CONFIG_MTD_TESTS) += mtd_nandbiterrs.o
+
+mtd_oobtest-objs := oobtest.o mtd_test.o
+mtd_pagetest-objs := pagetest.o mtd_test.o
+mtd_readtest-objs := readtest.o mtd_test.o
+mtd_speedtest-objs := speedtest.o mtd_test.o
+mtd_stresstest-objs := stresstest.o mtd_test.o
+mtd_subpagetest-objs := subpagetest.o mtd_test.o
+mtd_torturetest-objs := torturetest.o mtd_test.o
+mtd_nandbiterrs-objs := nandbiterrs.o mtd_test.o
+++ /dev/null
-/*
- * Copyright © 2012 NetCommWireless
- * Iwo Mergler <Iwo.Mergler@netcommwireless.com.au>
- *
- * Test for multi-bit error recovery on a NAND page This mostly tests the
- * ECC controller / driver.
- *
- * There are two test modes:
- *
- * 0 - artificially inserting bit errors until the ECC fails
- * This is the default method and fairly quick. It should
- * be independent of the quality of the FLASH.
- *
- * 1 - re-writing the same pattern repeatedly until the ECC fails.
- * This method relies on the physics of NAND FLASH to eventually
- * generate '0' bits if '1' has been written sufficient times.
- * Depending on the NAND, the first bit errors will appear after
- * 1000 or more writes and then will usually snowball, reaching the
- * limits of the ECC quickly.
- *
- * The test stops after 10000 cycles, should your FLASH be
- * exceptionally good and not generate bit errors before that. Try
- * a different page in that case.
- *
- * Please note that neither of these tests will significantly 'use up' any
- * FLASH endurance. Only a maximum of two erase operations will be performed.
- *
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; see the file COPYING. If not, write to the Free Software
- * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/mtd/mtd.h>
-#include <linux/err.h>
-#include <linux/mtd/nand.h>
-#include <linux/slab.h>
-
-static int dev;
-module_param(dev, int, S_IRUGO);
-MODULE_PARM_DESC(dev, "MTD device number to use");
-
-static unsigned page_offset;
-module_param(page_offset, uint, S_IRUGO);
-MODULE_PARM_DESC(page_offset, "Page number relative to dev start");
-
-static unsigned seed;
-module_param(seed, uint, S_IRUGO);
-MODULE_PARM_DESC(seed, "Random seed");
-
-static int mode;
-module_param(mode, int, S_IRUGO);
-MODULE_PARM_DESC(mode, "0=incremental errors, 1=overwrite test");
-
-static unsigned max_overwrite = 10000;
-
-static loff_t offset; /* Offset of the page we're using. */
-static unsigned eraseblock; /* Eraseblock number for our page. */
-
-/* We assume that the ECC can correct up to a certain number
- * of biterrors per subpage. */
-static unsigned subsize; /* Size of subpages */
-static unsigned subcount; /* Number of subpages per page */
-
-static struct mtd_info *mtd; /* MTD device */
-
-static uint8_t *wbuffer; /* One page write / compare buffer */
-static uint8_t *rbuffer; /* One page read buffer */
-
-/* 'random' bytes from known offsets */
-static uint8_t hash(unsigned offset)
-{
- unsigned v = offset;
- unsigned char c;
- v ^= 0x7f7edfd3;
- v = v ^ (v >> 3);
- v = v ^ (v >> 5);
- v = v ^ (v >> 13);
- c = v & 0xFF;
- /* Reverse bits of result. */
- c = (c & 0x0F) << 4 | (c & 0xF0) >> 4;
- c = (c & 0x33) << 2 | (c & 0xCC) >> 2;
- c = (c & 0x55) << 1 | (c & 0xAA) >> 1;
- return c;
-}
-
-static int erase_block(void)
-{
- int err;
- struct erase_info ei;
- loff_t addr = eraseblock * mtd->erasesize;
-
- pr_info("erase_block\n");
-
- memset(&ei, 0, sizeof(struct erase_info));
- ei.mtd = mtd;
- ei.addr = addr;
- ei.len = mtd->erasesize;
-
- err = mtd_erase(mtd, &ei);
- if (err || ei.state == MTD_ERASE_FAILED) {
- pr_err("error %d while erasing\n", err);
- if (!err)
- err = -EIO;
- return err;
- }
-
- return 0;
-}
-
-/* Writes wbuffer to page */
-static int write_page(int log)
-{
- int err = 0;
- size_t written;
-
- if (log)
- pr_info("write_page\n");
-
- err = mtd_write(mtd, offset, mtd->writesize, &written, wbuffer);
- if (err || written != mtd->writesize) {
- pr_err("error: write failed at %#llx\n", (long long)offset);
- if (!err)
- err = -EIO;
- }
-
- return err;
-}
-
-/* Re-writes the data area while leaving the OOB alone. */
-static int rewrite_page(int log)
-{
- int err = 0;
- struct mtd_oob_ops ops;
-
- if (log)
- pr_info("rewrite page\n");
-
- ops.mode = MTD_OPS_RAW; /* No ECC */
- ops.len = mtd->writesize;
- ops.retlen = 0;
- ops.ooblen = 0;
- ops.oobretlen = 0;
- ops.ooboffs = 0;
- ops.datbuf = wbuffer;
- ops.oobbuf = NULL;
-
- err = mtd_write_oob(mtd, offset, &ops);
- if (err || ops.retlen != mtd->writesize) {
- pr_err("error: write_oob failed (%d)\n", err);
- if (!err)
- err = -EIO;
- }
-
- return err;
-}
-
-/* Reads page into rbuffer. Returns number of corrected bit errors (>=0)
- * or error (<0) */
-static int read_page(int log)
-{
- int err = 0;
- size_t read;
- struct mtd_ecc_stats oldstats;
-
- if (log)
- pr_info("read_page\n");
-
- /* Saving last mtd stats */
- memcpy(&oldstats, &mtd->ecc_stats, sizeof(oldstats));
-
- err = mtd_read(mtd, offset, mtd->writesize, &read, rbuffer);
- if (err == -EUCLEAN)
- err = mtd->ecc_stats.corrected - oldstats.corrected;
-
- if (err < 0 || read != mtd->writesize) {
- pr_err("error: read failed at %#llx\n", (long long)offset);
- if (err >= 0)
- err = -EIO;
- }
-
- return err;
-}
-
-/* Verifies rbuffer against random sequence */
-static int verify_page(int log)
-{
- unsigned i, errs = 0;
-
- if (log)
- pr_info("verify_page\n");
-
- for (i = 0; i < mtd->writesize; i++) {
- if (rbuffer[i] != hash(i+seed)) {
- pr_err("Error: page offset %u, expected %02x, got %02x\n",
- i, hash(i+seed), rbuffer[i]);
- errs++;
- }
- }
-
- if (errs)
- return -EIO;
- else
- return 0;
-}
-
-#define CBIT(v, n) ((v) & (1 << (n)))
-#define BCLR(v, n) ((v) = (v) & ~(1 << (n)))
-
-/* Finds the first '1' bit in wbuffer starting at offset 'byte'
- * and sets it to '0'. */
-static int insert_biterror(unsigned byte)
-{
- int bit;
-
- while (byte < mtd->writesize) {
- for (bit = 7; bit >= 0; bit--) {
- if (CBIT(wbuffer[byte], bit)) {
- BCLR(wbuffer[byte], bit);
- pr_info("Inserted biterror @ %u/%u\n", byte, bit);
- return 0;
- }
- }
- byte++;
- }
- pr_err("biterror: Failed to find a '1' bit\n");
- return -EIO;
-}
-
-/* Writes 'random' data to page and then introduces deliberate bit
- * errors into the page, while verifying each step. */
-static int incremental_errors_test(void)
-{
- int err = 0;
- unsigned i;
- unsigned errs_per_subpage = 0;
-
- pr_info("incremental biterrors test\n");
-
- for (i = 0; i < mtd->writesize; i++)
- wbuffer[i] = hash(i+seed);
-
- err = write_page(1);
- if (err)
- goto exit;
-
- while (1) {
-
- err = rewrite_page(1);
- if (err)
- goto exit;
-
- err = read_page(1);
- if (err > 0)
- pr_info("Read reported %d corrected bit errors\n", err);
- if (err < 0) {
- pr_err("After %d biterrors per subpage, read reported error %d\n",
- errs_per_subpage, err);
- err = 0;
- goto exit;
- }
-
- err = verify_page(1);
- if (err) {
- pr_err("ECC failure, read data is incorrect despite read success\n");
- goto exit;
- }
-
- pr_info("Successfully corrected %d bit errors per subpage\n",
- errs_per_subpage);
-
- for (i = 0; i < subcount; i++) {
- err = insert_biterror(i * subsize);
- if (err < 0)
- goto exit;
- }
- errs_per_subpage++;
- }
-
-exit:
- return err;
-}
-
-
-/* Writes 'random' data to page and then re-writes that same data repeatedly.
- This eventually develops bit errors (bits written as '1' will slowly become
- '0'), which are corrected as far as the ECC is capable of. */
-static int overwrite_test(void)
-{
- int err = 0;
- unsigned i;
- unsigned max_corrected = 0;
- unsigned opno = 0;
- /* We don't expect more than this many correctable bit errors per
- * page. */
- #define MAXBITS 512
- static unsigned bitstats[MAXBITS]; /* bit error histogram. */
-
- memset(bitstats, 0, sizeof(bitstats));
-
- pr_info("overwrite biterrors test\n");
-
- for (i = 0; i < mtd->writesize; i++)
- wbuffer[i] = hash(i+seed);
-
- err = write_page(1);
- if (err)
- goto exit;
-
- while (opno < max_overwrite) {
-
- err = rewrite_page(0);
- if (err)
- break;
-
- err = read_page(0);
- if (err >= 0) {
- if (err >= MAXBITS) {
- pr_info("Implausible number of bit errors corrected\n");
- err = -EIO;
- break;
- }
- bitstats[err]++;
- if (err > max_corrected) {
- max_corrected = err;
- pr_info("Read reported %d corrected bit errors\n",
- err);
- }
- } else { /* err < 0 */
- pr_info("Read reported error %d\n", err);
- err = 0;
- break;
- }
-
- err = verify_page(0);
- if (err) {
- bitstats[max_corrected] = opno;
- pr_info("ECC failure, read data is incorrect despite read success\n");
- break;
- }
-
- opno++;
- }
-
- /* At this point bitstats[0] contains the number of ops with no bit
- * errors, bitstats[1] the number of ops with 1 bit error, etc. */
- pr_info("Bit error histogram (%d operations total):\n", opno);
- for (i = 0; i < max_corrected; i++)
- pr_info("Page reads with %3d corrected bit errors: %d\n",
- i, bitstats[i]);
-
-exit:
- return err;
-}
-
-static int __init mtd_nandbiterrs_init(void)
-{
- int err = 0;
-
- printk("\n");
- printk(KERN_INFO "==================================================\n");
- pr_info("MTD device: %d\n", dev);
-
- mtd = get_mtd_device(NULL, dev);
- if (IS_ERR(mtd)) {
- err = PTR_ERR(mtd);
- pr_err("error: cannot get MTD device\n");
- goto exit_mtddev;
- }
-
- if (mtd->type != MTD_NANDFLASH) {
- pr_info("this test requires NAND flash\n");
- err = -ENODEV;
- goto exit_nand;
- }
-
- pr_info("MTD device size %llu, eraseblock=%u, page=%u, oob=%u\n",
- (unsigned long long)mtd->size, mtd->erasesize,
- mtd->writesize, mtd->oobsize);
-
- subsize = mtd->writesize >> mtd->subpage_sft;
- subcount = mtd->writesize / subsize;
-
- pr_info("Device uses %d subpages of %d bytes\n", subcount, subsize);
-
- offset = page_offset * mtd->writesize;
- eraseblock = mtd_div_by_eb(offset, mtd);
-
- pr_info("Using page=%u, offset=%llu, eraseblock=%u\n",
- page_offset, offset, eraseblock);
-
- wbuffer = kmalloc(mtd->writesize, GFP_KERNEL);
- if (!wbuffer) {
- err = -ENOMEM;
- goto exit_wbuffer;
- }
-
- rbuffer = kmalloc(mtd->writesize, GFP_KERNEL);
- if (!rbuffer) {
- err = -ENOMEM;
- goto exit_rbuffer;
- }
-
- err = erase_block();
- if (err)
- goto exit_error;
-
- if (mode == 0)
- err = incremental_errors_test();
- else
- err = overwrite_test();
-
- if (err)
- goto exit_error;
-
- /* We leave the block un-erased in case of test failure. */
- err = erase_block();
- if (err)
- goto exit_error;
-
- err = -EIO;
- pr_info("finished successfully.\n");
- printk(KERN_INFO "==================================================\n");
-
-exit_error:
- kfree(rbuffer);
-exit_rbuffer:
- kfree(wbuffer);
-exit_wbuffer:
- /* Nothing */
-exit_nand:
- put_mtd_device(mtd);
-exit_mtddev:
- return err;
-}
-
-static void __exit mtd_nandbiterrs_exit(void)
-{
- return;
-}
-
-module_init(mtd_nandbiterrs_init);
-module_exit(mtd_nandbiterrs_exit);
-
-MODULE_DESCRIPTION("NAND bit error recovery test");
-MODULE_AUTHOR("Iwo Mergler");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * Copyright (C) 2006-2008 Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; see the file COPYING. If not, write to the Free Software
- * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Test OOB read and write on MTD device.
- *
- * Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <asm/div64.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/err.h>
-#include <linux/mtd/mtd.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-#include <linux/random.h>
-
-static int dev = -EINVAL;
-module_param(dev, int, S_IRUGO);
-MODULE_PARM_DESC(dev, "MTD device number to use");
-
-static struct mtd_info *mtd;
-static unsigned char *readbuf;
-static unsigned char *writebuf;
-static unsigned char *bbt;
-
-static int ebcnt;
-static int pgcnt;
-static int errcnt;
-static int use_offset;
-static int use_len;
-static int use_len_max;
-static int vary_offset;
-static struct rnd_state rnd_state;
-
-static int erase_eraseblock(int ebnum)
-{
- int err;
- struct erase_info ei;
- loff_t addr = ebnum * mtd->erasesize;
-
- memset(&ei, 0, sizeof(struct erase_info));
- ei.mtd = mtd;
- ei.addr = addr;
- ei.len = mtd->erasesize;
-
- err = mtd_erase(mtd, &ei);
- if (err) {
- pr_err("error %d while erasing EB %d\n", err, ebnum);
- return err;
- }
-
- if (ei.state == MTD_ERASE_FAILED) {
- pr_err("some erase error occurred at EB %d\n", ebnum);
- return -EIO;
- }
-
- return 0;
-}
-
-static int erase_whole_device(void)
-{
- int err;
- unsigned int i;
-
- pr_info("erasing whole device\n");
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = erase_eraseblock(i);
- if (err)
- return err;
- cond_resched();
- }
- pr_info("erased %u eraseblocks\n", i);
- return 0;
-}
-
-static void do_vary_offset(void)
-{
- use_len -= 1;
- if (use_len < 1) {
- use_offset += 1;
- if (use_offset >= use_len_max)
- use_offset = 0;
- use_len = use_len_max - use_offset;
- }
-}
-
-static int write_eraseblock(int ebnum)
-{
- int i;
- struct mtd_oob_ops ops;
- int err = 0;
- loff_t addr = ebnum * mtd->erasesize;
-
- for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) {
- prandom_bytes_state(&rnd_state, writebuf, use_len);
- ops.mode = MTD_OPS_AUTO_OOB;
- ops.len = 0;
- ops.retlen = 0;
- ops.ooblen = use_len;
- ops.oobretlen = 0;
- ops.ooboffs = use_offset;
- ops.datbuf = NULL;
- ops.oobbuf = writebuf;
- err = mtd_write_oob(mtd, addr, &ops);
- if (err || ops.oobretlen != use_len) {
- pr_err("error: writeoob failed at %#llx\n",
- (long long)addr);
- pr_err("error: use_len %d, use_offset %d\n",
- use_len, use_offset);
- errcnt += 1;
- return err ? err : -1;
- }
- if (vary_offset)
- do_vary_offset();
- }
-
- return err;
-}
-
-static int write_whole_device(void)
-{
- int err;
- unsigned int i;
-
- pr_info("writing OOBs of whole device\n");
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = write_eraseblock(i);
- if (err)
- return err;
- if (i % 256 == 0)
- pr_info("written up to eraseblock %u\n", i);
- cond_resched();
- }
- pr_info("written %u eraseblocks\n", i);
- return 0;
-}
-
-static int verify_eraseblock(int ebnum)
-{
- int i;
- struct mtd_oob_ops ops;
- int err = 0;
- loff_t addr = ebnum * mtd->erasesize;
-
- for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) {
- prandom_bytes_state(&rnd_state, writebuf, use_len);
- ops.mode = MTD_OPS_AUTO_OOB;
- ops.len = 0;
- ops.retlen = 0;
- ops.ooblen = use_len;
- ops.oobretlen = 0;
- ops.ooboffs = use_offset;
- ops.datbuf = NULL;
- ops.oobbuf = readbuf;
- err = mtd_read_oob(mtd, addr, &ops);
- if (err || ops.oobretlen != use_len) {
- pr_err("error: readoob failed at %#llx\n",
- (long long)addr);
- errcnt += 1;
- return err ? err : -1;
- }
- if (memcmp(readbuf, writebuf, use_len)) {
- pr_err("error: verify failed at %#llx\n",
- (long long)addr);
- errcnt += 1;
- if (errcnt > 1000) {
- pr_err("error: too many errors\n");
- return -1;
- }
- }
- if (use_offset != 0 || use_len < mtd->ecclayout->oobavail) {
- int k;
-
- ops.mode = MTD_OPS_AUTO_OOB;
- ops.len = 0;
- ops.retlen = 0;
- ops.ooblen = mtd->ecclayout->oobavail;
- ops.oobretlen = 0;
- ops.ooboffs = 0;
- ops.datbuf = NULL;
- ops.oobbuf = readbuf;
- err = mtd_read_oob(mtd, addr, &ops);
- if (err || ops.oobretlen != mtd->ecclayout->oobavail) {
- pr_err("error: readoob failed at %#llx\n",
- (long long)addr);
- errcnt += 1;
- return err ? err : -1;
- }
- if (memcmp(readbuf + use_offset, writebuf, use_len)) {
- pr_err("error: verify failed at %#llx\n",
- (long long)addr);
- errcnt += 1;
- if (errcnt > 1000) {
- pr_err("error: too many errors\n");
- return -1;
- }
- }
- for (k = 0; k < use_offset; ++k)
- if (readbuf[k] != 0xff) {
- pr_err("error: verify 0xff "
- "failed at %#llx\n",
- (long long)addr);
- errcnt += 1;
- if (errcnt > 1000) {
- pr_err("error: too "
- "many errors\n");
- return -1;
- }
- }
- for (k = use_offset + use_len;
- k < mtd->ecclayout->oobavail; ++k)
- if (readbuf[k] != 0xff) {
- pr_err("error: verify 0xff "
- "failed at %#llx\n",
- (long long)addr);
- errcnt += 1;
- if (errcnt > 1000) {
- pr_err("error: too "
- "many errors\n");
- return -1;
- }
- }
- }
- if (vary_offset)
- do_vary_offset();
- }
- return err;
-}
-
-static int verify_eraseblock_in_one_go(int ebnum)
-{
- struct mtd_oob_ops ops;
- int err = 0;
- loff_t addr = ebnum * mtd->erasesize;
- size_t len = mtd->ecclayout->oobavail * pgcnt;
-
- prandom_bytes_state(&rnd_state, writebuf, len);
- ops.mode = MTD_OPS_AUTO_OOB;
- ops.len = 0;
- ops.retlen = 0;
- ops.ooblen = len;
- ops.oobretlen = 0;
- ops.ooboffs = 0;
- ops.datbuf = NULL;
- ops.oobbuf = readbuf;
- err = mtd_read_oob(mtd, addr, &ops);
- if (err || ops.oobretlen != len) {
- pr_err("error: readoob failed at %#llx\n",
- (long long)addr);
- errcnt += 1;
- return err ? err : -1;
- }
- if (memcmp(readbuf, writebuf, len)) {
- pr_err("error: verify failed at %#llx\n",
- (long long)addr);
- errcnt += 1;
- if (errcnt > 1000) {
- pr_err("error: too many errors\n");
- return -1;
- }
- }
-
- return err;
-}
-
-static int verify_all_eraseblocks(void)
-{
- int err;
- unsigned int i;
-
- pr_info("verifying all eraseblocks\n");
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = verify_eraseblock(i);
- if (err)
- return err;
- if (i % 256 == 0)
- pr_info("verified up to eraseblock %u\n", i);
- cond_resched();
- }
- pr_info("verified %u eraseblocks\n", i);
- return 0;
-}
-
-static int is_block_bad(int ebnum)
-{
- int ret;
- loff_t addr = ebnum * mtd->erasesize;
-
- ret = mtd_block_isbad(mtd, addr);
- if (ret)
- pr_info("block %d is bad\n", ebnum);
- return ret;
-}
-
-static int scan_for_bad_eraseblocks(void)
-{
- int i, bad = 0;
-
- bbt = kmalloc(ebcnt, GFP_KERNEL);
- if (!bbt)
- return -ENOMEM;
-
- pr_info("scanning for bad eraseblocks\n");
- for (i = 0; i < ebcnt; ++i) {
- bbt[i] = is_block_bad(i) ? 1 : 0;
- if (bbt[i])
- bad += 1;
- cond_resched();
- }
- pr_info("scanned %d eraseblocks, %d are bad\n", i, bad);
- return 0;
-}
-
-static int __init mtd_oobtest_init(void)
-{
- int err = 0;
- unsigned int i;
- uint64_t tmp;
- struct mtd_oob_ops ops;
- loff_t addr = 0, addr0;
-
- printk(KERN_INFO "\n");
- printk(KERN_INFO "=================================================\n");
-
- if (dev < 0) {
- pr_info("Please specify a valid mtd-device via module parameter\n");
- pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
- return -EINVAL;
- }
-
- pr_info("MTD device: %d\n", dev);
-
- mtd = get_mtd_device(NULL, dev);
- if (IS_ERR(mtd)) {
- err = PTR_ERR(mtd);
- pr_err("error: cannot get MTD device\n");
- return err;
- }
-
- if (mtd->type != MTD_NANDFLASH) {
- pr_info("this test requires NAND flash\n");
- goto out;
- }
-
- tmp = mtd->size;
- do_div(tmp, mtd->erasesize);
- ebcnt = tmp;
- pgcnt = mtd->erasesize / mtd->writesize;
-
- pr_info("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,
- mtd->writesize, ebcnt, pgcnt, mtd->oobsize);
-
- err = -ENOMEM;
- readbuf = kmalloc(mtd->erasesize, GFP_KERNEL);
- if (!readbuf)
- goto out;
- writebuf = kmalloc(mtd->erasesize, GFP_KERNEL);
- if (!writebuf)
- goto out;
-
- err = scan_for_bad_eraseblocks();
- if (err)
- goto out;
-
- use_offset = 0;
- use_len = mtd->ecclayout->oobavail;
- use_len_max = mtd->ecclayout->oobavail;
- vary_offset = 0;
-
- /* First test: write all OOB, read it back and verify */
- pr_info("test 1 of 5\n");
-
- err = erase_whole_device();
- if (err)
- goto out;
-
- prandom_seed_state(&rnd_state, 1);
- err = write_whole_device();
- if (err)
- goto out;
-
- prandom_seed_state(&rnd_state, 1);
- err = verify_all_eraseblocks();
- if (err)
- goto out;
-
- /*
- * Second test: write all OOB, a block at a time, read it back and
- * verify.
- */
- pr_info("test 2 of 5\n");
-
- err = erase_whole_device();
- if (err)
- goto out;
-
- prandom_seed_state(&rnd_state, 3);
- err = write_whole_device();
- if (err)
- goto out;
-
- /* Check all eraseblocks */
- prandom_seed_state(&rnd_state, 3);
- pr_info("verifying all eraseblocks\n");
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = verify_eraseblock_in_one_go(i);
- if (err)
- goto out;
- if (i % 256 == 0)
- pr_info("verified up to eraseblock %u\n", i);
- cond_resched();
- }
- pr_info("verified %u eraseblocks\n", i);
-
- /*
- * Third test: write OOB at varying offsets and lengths, read it back
- * and verify.
- */
- pr_info("test 3 of 5\n");
-
- err = erase_whole_device();
- if (err)
- goto out;
-
- /* Write all eraseblocks */
- use_offset = 0;
- use_len = mtd->ecclayout->oobavail;
- use_len_max = mtd->ecclayout->oobavail;
- vary_offset = 1;
- prandom_seed_state(&rnd_state, 5);
-
- err = write_whole_device();
- if (err)
- goto out;
-
- /* Check all eraseblocks */
- use_offset = 0;
- use_len = mtd->ecclayout->oobavail;
- use_len_max = mtd->ecclayout->oobavail;
- vary_offset = 1;
- prandom_seed_state(&rnd_state, 5);
- err = verify_all_eraseblocks();
- if (err)
- goto out;
-
- use_offset = 0;
- use_len = mtd->ecclayout->oobavail;
- use_len_max = mtd->ecclayout->oobavail;
- vary_offset = 0;
-
- /* Fourth test: try to write off end of device */
- pr_info("test 4 of 5\n");
-
- err = erase_whole_device();
- if (err)
- goto out;
-
- addr0 = 0;
- for (i = 0; i < ebcnt && bbt[i]; ++i)
- addr0 += mtd->erasesize;
-
- /* Attempt to write off end of OOB */
- ops.mode = MTD_OPS_AUTO_OOB;
- ops.len = 0;
- ops.retlen = 0;
- ops.ooblen = 1;
- ops.oobretlen = 0;
- ops.ooboffs = mtd->ecclayout->oobavail;
- ops.datbuf = NULL;
- ops.oobbuf = writebuf;
- pr_info("attempting to start write past end of OOB\n");
- pr_info("an error is expected...\n");
- err = mtd_write_oob(mtd, addr0, &ops);
- if (err) {
- pr_info("error occurred as expected\n");
- err = 0;
- } else {
- pr_err("error: can write past end of OOB\n");
- errcnt += 1;
- }
-
- /* Attempt to read off end of OOB */
- ops.mode = MTD_OPS_AUTO_OOB;
- ops.len = 0;
- ops.retlen = 0;
- ops.ooblen = 1;
- ops.oobretlen = 0;
- ops.ooboffs = mtd->ecclayout->oobavail;
- ops.datbuf = NULL;
- ops.oobbuf = readbuf;
- pr_info("attempting to start read past end of OOB\n");
- pr_info("an error is expected...\n");
- err = mtd_read_oob(mtd, addr0, &ops);
- if (err) {
- pr_info("error occurred as expected\n");
- err = 0;
- } else {
- pr_err("error: can read past end of OOB\n");
- errcnt += 1;
- }
-
- if (bbt[ebcnt - 1])
- pr_info("skipping end of device tests because last "
- "block is bad\n");
- else {
- /* Attempt to write off end of device */
- ops.mode = MTD_OPS_AUTO_OOB;
- ops.len = 0;
- ops.retlen = 0;
- ops.ooblen = mtd->ecclayout->oobavail + 1;
- ops.oobretlen = 0;
- ops.ooboffs = 0;
- ops.datbuf = NULL;
- ops.oobbuf = writebuf;
- pr_info("attempting to write past end of device\n");
- pr_info("an error is expected...\n");
- err = mtd_write_oob(mtd, mtd->size - mtd->writesize, &ops);
- if (err) {
- pr_info("error occurred as expected\n");
- err = 0;
- } else {
- pr_err("error: wrote past end of device\n");
- errcnt += 1;
- }
-
- /* Attempt to read off end of device */
- ops.mode = MTD_OPS_AUTO_OOB;
- ops.len = 0;
- ops.retlen = 0;
- ops.ooblen = mtd->ecclayout->oobavail + 1;
- ops.oobretlen = 0;
- ops.ooboffs = 0;
- ops.datbuf = NULL;
- ops.oobbuf = readbuf;
- pr_info("attempting to read past end of device\n");
- pr_info("an error is expected...\n");
- err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops);
- if (err) {
- pr_info("error occurred as expected\n");
- err = 0;
- } else {
- pr_err("error: read past end of device\n");
- errcnt += 1;
- }
-
- err = erase_eraseblock(ebcnt - 1);
- if (err)
- goto out;
-
- /* Attempt to write off end of device */
- ops.mode = MTD_OPS_AUTO_OOB;
- ops.len = 0;
- ops.retlen = 0;
- ops.ooblen = mtd->ecclayout->oobavail;
- ops.oobretlen = 0;
- ops.ooboffs = 1;
- ops.datbuf = NULL;
- ops.oobbuf = writebuf;
- pr_info("attempting to write past end of device\n");
- pr_info("an error is expected...\n");
- err = mtd_write_oob(mtd, mtd->size - mtd->writesize, &ops);
- if (err) {
- pr_info("error occurred as expected\n");
- err = 0;
- } else {
- pr_err("error: wrote past end of device\n");
- errcnt += 1;
- }
-
- /* Attempt to read off end of device */
- ops.mode = MTD_OPS_AUTO_OOB;
- ops.len = 0;
- ops.retlen = 0;
- ops.ooblen = mtd->ecclayout->oobavail;
- ops.oobretlen = 0;
- ops.ooboffs = 1;
- ops.datbuf = NULL;
- ops.oobbuf = readbuf;
- pr_info("attempting to read past end of device\n");
- pr_info("an error is expected...\n");
- err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops);
- if (err) {
- pr_info("error occurred as expected\n");
- err = 0;
- } else {
- pr_err("error: read past end of device\n");
- errcnt += 1;
- }
- }
-
- /* Fifth test: write / read across block boundaries */
- pr_info("test 5 of 5\n");
-
- /* Erase all eraseblocks */
- err = erase_whole_device();
- if (err)
- goto out;
-
- /* Write all eraseblocks */
- prandom_seed_state(&rnd_state, 11);
- pr_info("writing OOBs of whole device\n");
- for (i = 0; i < ebcnt - 1; ++i) {
- int cnt = 2;
- int pg;
- size_t sz = mtd->ecclayout->oobavail;
- if (bbt[i] || bbt[i + 1])
- continue;
- addr = (i + 1) * mtd->erasesize - mtd->writesize;
- for (pg = 0; pg < cnt; ++pg) {
- prandom_bytes_state(&rnd_state, writebuf, sz);
- ops.mode = MTD_OPS_AUTO_OOB;
- ops.len = 0;
- ops.retlen = 0;
- ops.ooblen = sz;
- ops.oobretlen = 0;
- ops.ooboffs = 0;
- ops.datbuf = NULL;
- ops.oobbuf = writebuf;
- err = mtd_write_oob(mtd, addr, &ops);
- if (err)
- goto out;
- if (i % 256 == 0)
- pr_info("written up to eraseblock %u\n", i);
- cond_resched();
- addr += mtd->writesize;
- }
- }
- pr_info("written %u eraseblocks\n", i);
-
- /* Check all eraseblocks */
- prandom_seed_state(&rnd_state, 11);
- pr_info("verifying all eraseblocks\n");
- for (i = 0; i < ebcnt - 1; ++i) {
- if (bbt[i] || bbt[i + 1])
- continue;
- prandom_bytes_state(&rnd_state, writebuf,
- mtd->ecclayout->oobavail * 2);
- addr = (i + 1) * mtd->erasesize - mtd->writesize;
- ops.mode = MTD_OPS_AUTO_OOB;
- ops.len = 0;
- ops.retlen = 0;
- ops.ooblen = mtd->ecclayout->oobavail * 2;
- ops.oobretlen = 0;
- ops.ooboffs = 0;
- ops.datbuf = NULL;
- ops.oobbuf = readbuf;
- err = mtd_read_oob(mtd, addr, &ops);
- if (err)
- goto out;
- if (memcmp(readbuf, writebuf, mtd->ecclayout->oobavail * 2)) {
- pr_err("error: verify failed at %#llx\n",
- (long long)addr);
- errcnt += 1;
- if (errcnt > 1000) {
- pr_err("error: too many errors\n");
- goto out;
- }
- }
- if (i % 256 == 0)
- pr_info("verified up to eraseblock %u\n", i);
- cond_resched();
- }
- pr_info("verified %u eraseblocks\n", i);
-
- pr_info("finished with %d errors\n", errcnt);
-out:
- kfree(bbt);
- kfree(writebuf);
- kfree(readbuf);
- put_mtd_device(mtd);
- if (err)
- pr_info("error %d occurred\n", err);
- printk(KERN_INFO "=================================================\n");
- return err;
-}
-module_init(mtd_oobtest_init);
-
-static void __exit mtd_oobtest_exit(void)
-{
- return;
-}
-module_exit(mtd_oobtest_exit);
-
-MODULE_DESCRIPTION("Out-of-band test module");
-MODULE_AUTHOR("Adrian Hunter");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * Copyright (C) 2006-2008 Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; see the file COPYING. If not, write to the Free Software
- * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Test page read and write on MTD device.
- *
- * Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <asm/div64.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/err.h>
-#include <linux/mtd/mtd.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-#include <linux/random.h>
-
-static int dev = -EINVAL;
-module_param(dev, int, S_IRUGO);
-MODULE_PARM_DESC(dev, "MTD device number to use");
-
-static struct mtd_info *mtd;
-static unsigned char *twopages;
-static unsigned char *writebuf;
-static unsigned char *boundary;
-static unsigned char *bbt;
-
-static int pgsize;
-static int bufsize;
-static int ebcnt;
-static int pgcnt;
-static int errcnt;
-static struct rnd_state rnd_state;
-
-static int erase_eraseblock(int ebnum)
-{
- int err;
- struct erase_info ei;
- loff_t addr = ebnum * mtd->erasesize;
-
- memset(&ei, 0, sizeof(struct erase_info));
- ei.mtd = mtd;
- ei.addr = addr;
- ei.len = mtd->erasesize;
-
- err = mtd_erase(mtd, &ei);
- if (err) {
- pr_err("error %d while erasing EB %d\n", err, ebnum);
- return err;
- }
-
- if (ei.state == MTD_ERASE_FAILED) {
- pr_err("some erase error occurred at EB %d\n",
- ebnum);
- return -EIO;
- }
-
- return 0;
-}
-
-static int write_eraseblock(int ebnum)
-{
- int err = 0;
- size_t written;
- loff_t addr = ebnum * mtd->erasesize;
-
- prandom_bytes_state(&rnd_state, writebuf, mtd->erasesize);
- cond_resched();
- err = mtd_write(mtd, addr, mtd->erasesize, &written, writebuf);
- if (err || written != mtd->erasesize)
- pr_err("error: write failed at %#llx\n",
- (long long)addr);
-
- return err;
-}
-
-static int verify_eraseblock(int ebnum)
-{
- uint32_t j;
- size_t read;
- int err = 0, i;
- loff_t addr0, addrn;
- loff_t addr = ebnum * mtd->erasesize;
-
- addr0 = 0;
- for (i = 0; i < ebcnt && bbt[i]; ++i)
- addr0 += mtd->erasesize;
-
- addrn = mtd->size;
- for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++i)
- addrn -= mtd->erasesize;
-
- prandom_bytes_state(&rnd_state, writebuf, mtd->erasesize);
- for (j = 0; j < pgcnt - 1; ++j, addr += pgsize) {
- /* Do a read to set the internal dataRAMs to different data */
- err = mtd_read(mtd, addr0, bufsize, &read, twopages);
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != bufsize) {
- pr_err("error: read failed at %#llx\n",
- (long long)addr0);
- return err;
- }
- err = mtd_read(mtd, addrn - bufsize, bufsize, &read, twopages);
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != bufsize) {
- pr_err("error: read failed at %#llx\n",
- (long long)(addrn - bufsize));
- return err;
- }
- memset(twopages, 0, bufsize);
- err = mtd_read(mtd, addr, bufsize, &read, twopages);
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != bufsize) {
- pr_err("error: read failed at %#llx\n",
- (long long)addr);
- break;
- }
- if (memcmp(twopages, writebuf + (j * pgsize), bufsize)) {
- pr_err("error: verify failed at %#llx\n",
- (long long)addr);
- errcnt += 1;
- }
- }
- /* Check boundary between eraseblocks */
- if (addr <= addrn - pgsize - pgsize && !bbt[ebnum + 1]) {
- struct rnd_state old_state = rnd_state;
-
- /* Do a read to set the internal dataRAMs to different data */
- err = mtd_read(mtd, addr0, bufsize, &read, twopages);
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != bufsize) {
- pr_err("error: read failed at %#llx\n",
- (long long)addr0);
- return err;
- }
- err = mtd_read(mtd, addrn - bufsize, bufsize, &read, twopages);
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != bufsize) {
- pr_err("error: read failed at %#llx\n",
- (long long)(addrn - bufsize));
- return err;
- }
- memset(twopages, 0, bufsize);
- err = mtd_read(mtd, addr, bufsize, &read, twopages);
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != bufsize) {
- pr_err("error: read failed at %#llx\n",
- (long long)addr);
- return err;
- }
- memcpy(boundary, writebuf + mtd->erasesize - pgsize, pgsize);
- prandom_bytes_state(&rnd_state, boundary + pgsize, pgsize);
- if (memcmp(twopages, boundary, bufsize)) {
- pr_err("error: verify failed at %#llx\n",
- (long long)addr);
- errcnt += 1;
- }
- rnd_state = old_state;
- }
- return err;
-}
-
-static int crosstest(void)
-{
- size_t read;
- int err = 0, i;
- loff_t addr, addr0, addrn;
- unsigned char *pp1, *pp2, *pp3, *pp4;
-
- pr_info("crosstest\n");
- pp1 = kmalloc(pgsize * 4, GFP_KERNEL);
- if (!pp1)
- return -ENOMEM;
- pp2 = pp1 + pgsize;
- pp3 = pp2 + pgsize;
- pp4 = pp3 + pgsize;
- memset(pp1, 0, pgsize * 4);
-
- addr0 = 0;
- for (i = 0; i < ebcnt && bbt[i]; ++i)
- addr0 += mtd->erasesize;
-
- addrn = mtd->size;
- for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++i)
- addrn -= mtd->erasesize;
-
- /* Read 2nd-to-last page to pp1 */
- addr = addrn - pgsize - pgsize;
- err = mtd_read(mtd, addr, pgsize, &read, pp1);
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != pgsize) {
- pr_err("error: read failed at %#llx\n",
- (long long)addr);
- kfree(pp1);
- return err;
- }
-
- /* Read 3rd-to-last page to pp1 */
- addr = addrn - pgsize - pgsize - pgsize;
- err = mtd_read(mtd, addr, pgsize, &read, pp1);
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != pgsize) {
- pr_err("error: read failed at %#llx\n",
- (long long)addr);
- kfree(pp1);
- return err;
- }
-
- /* Read first page to pp2 */
- addr = addr0;
- pr_info("reading page at %#llx\n", (long long)addr);
- err = mtd_read(mtd, addr, pgsize, &read, pp2);
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != pgsize) {
- pr_err("error: read failed at %#llx\n",
- (long long)addr);
- kfree(pp1);
- return err;
- }
-
- /* Read last page to pp3 */
- addr = addrn - pgsize;
- pr_info("reading page at %#llx\n", (long long)addr);
- err = mtd_read(mtd, addr, pgsize, &read, pp3);
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != pgsize) {
- pr_err("error: read failed at %#llx\n",
- (long long)addr);
- kfree(pp1);
- return err;
- }
-
- /* Read first page again to pp4 */
- addr = addr0;
- pr_info("reading page at %#llx\n", (long long)addr);
- err = mtd_read(mtd, addr, pgsize, &read, pp4);
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != pgsize) {
- pr_err("error: read failed at %#llx\n",
- (long long)addr);
- kfree(pp1);
- return err;
- }
-
- /* pp2 and pp4 should be the same */
- pr_info("verifying pages read at %#llx match\n",
- (long long)addr0);
- if (memcmp(pp2, pp4, pgsize)) {
- pr_err("verify failed!\n");
- errcnt += 1;
- } else if (!err)
- pr_info("crosstest ok\n");
- kfree(pp1);
- return err;
-}
-
-static int erasecrosstest(void)
-{
- size_t read, written;
- int err = 0, i, ebnum, ebnum2;
- loff_t addr0;
- char *readbuf = twopages;
-
- pr_info("erasecrosstest\n");
-
- ebnum = 0;
- addr0 = 0;
- for (i = 0; i < ebcnt && bbt[i]; ++i) {
- addr0 += mtd->erasesize;
- ebnum += 1;
- }
-
- ebnum2 = ebcnt - 1;
- while (ebnum2 && bbt[ebnum2])
- ebnum2 -= 1;
-
- pr_info("erasing block %d\n", ebnum);
- err = erase_eraseblock(ebnum);
- if (err)
- return err;
-
- pr_info("writing 1st page of block %d\n", ebnum);
- prandom_bytes_state(&rnd_state, writebuf, pgsize);
- strcpy(writebuf, "There is no data like this!");
- err = mtd_write(mtd, addr0, pgsize, &written, writebuf);
- if (err || written != pgsize) {
- pr_info("error: write failed at %#llx\n",
- (long long)addr0);
- return err ? err : -1;
- }
-
- pr_info("reading 1st page of block %d\n", ebnum);
- memset(readbuf, 0, pgsize);
- err = mtd_read(mtd, addr0, pgsize, &read, readbuf);
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != pgsize) {
- pr_err("error: read failed at %#llx\n",
- (long long)addr0);
- return err ? err : -1;
- }
-
- pr_info("verifying 1st page of block %d\n", ebnum);
- if (memcmp(writebuf, readbuf, pgsize)) {
- pr_err("verify failed!\n");
- errcnt += 1;
- return -1;
- }
-
- pr_info("erasing block %d\n", ebnum);
- err = erase_eraseblock(ebnum);
- if (err)
- return err;
-
- pr_info("writing 1st page of block %d\n", ebnum);
- prandom_bytes_state(&rnd_state, writebuf, pgsize);
- strcpy(writebuf, "There is no data like this!");
- err = mtd_write(mtd, addr0, pgsize, &written, writebuf);
- if (err || written != pgsize) {
- pr_err("error: write failed at %#llx\n",
- (long long)addr0);
- return err ? err : -1;
- }
-
- pr_info("erasing block %d\n", ebnum2);
- err = erase_eraseblock(ebnum2);
- if (err)
- return err;
-
- pr_info("reading 1st page of block %d\n", ebnum);
- memset(readbuf, 0, pgsize);
- err = mtd_read(mtd, addr0, pgsize, &read, readbuf);
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != pgsize) {
- pr_err("error: read failed at %#llx\n",
- (long long)addr0);
- return err ? err : -1;
- }
-
- pr_info("verifying 1st page of block %d\n", ebnum);
- if (memcmp(writebuf, readbuf, pgsize)) {
- pr_err("verify failed!\n");
- errcnt += 1;
- return -1;
- }
-
- if (!err)
- pr_info("erasecrosstest ok\n");
- return err;
-}
-
-static int erasetest(void)
-{
- size_t read, written;
- int err = 0, i, ebnum, ok = 1;
- loff_t addr0;
-
- pr_info("erasetest\n");
-
- ebnum = 0;
- addr0 = 0;
- for (i = 0; i < ebcnt && bbt[i]; ++i) {
- addr0 += mtd->erasesize;
- ebnum += 1;
- }
-
- pr_info("erasing block %d\n", ebnum);
- err = erase_eraseblock(ebnum);
- if (err)
- return err;
-
- pr_info("writing 1st page of block %d\n", ebnum);
- prandom_bytes_state(&rnd_state, writebuf, pgsize);
- err = mtd_write(mtd, addr0, pgsize, &written, writebuf);
- if (err || written != pgsize) {
- pr_err("error: write failed at %#llx\n",
- (long long)addr0);
- return err ? err : -1;
- }
-
- pr_info("erasing block %d\n", ebnum);
- err = erase_eraseblock(ebnum);
- if (err)
- return err;
-
- pr_info("reading 1st page of block %d\n", ebnum);
- err = mtd_read(mtd, addr0, pgsize, &read, twopages);
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != pgsize) {
- pr_err("error: read failed at %#llx\n",
- (long long)addr0);
- return err ? err : -1;
- }
-
- pr_info("verifying 1st page of block %d is all 0xff\n",
- ebnum);
- for (i = 0; i < pgsize; ++i)
- if (twopages[i] != 0xff) {
- pr_err("verifying all 0xff failed at %d\n",
- i);
- errcnt += 1;
- ok = 0;
- break;
- }
-
- if (ok && !err)
- pr_info("erasetest ok\n");
-
- return err;
-}
-
-static int is_block_bad(int ebnum)
-{
- loff_t addr = ebnum * mtd->erasesize;
- int ret;
-
- ret = mtd_block_isbad(mtd, addr);
- if (ret)
- pr_info("block %d is bad\n", ebnum);
- return ret;
-}
-
-static int scan_for_bad_eraseblocks(void)
-{
- int i, bad = 0;
-
- bbt = kzalloc(ebcnt, GFP_KERNEL);
- if (!bbt)
- return -ENOMEM;
-
- pr_info("scanning for bad eraseblocks\n");
- for (i = 0; i < ebcnt; ++i) {
- bbt[i] = is_block_bad(i) ? 1 : 0;
- if (bbt[i])
- bad += 1;
- cond_resched();
- }
- pr_info("scanned %d eraseblocks, %d are bad\n", i, bad);
- return 0;
-}
-
-static int __init mtd_pagetest_init(void)
-{
- int err = 0;
- uint64_t tmp;
- uint32_t i;
-
- printk(KERN_INFO "\n");
- printk(KERN_INFO "=================================================\n");
-
- if (dev < 0) {
- pr_info("Please specify a valid mtd-device via module parameter\n");
- pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
- return -EINVAL;
- }
-
- pr_info("MTD device: %d\n", dev);
-
- mtd = get_mtd_device(NULL, dev);
- if (IS_ERR(mtd)) {
- err = PTR_ERR(mtd);
- pr_err("error: cannot get MTD device\n");
- return err;
- }
-
- if (mtd->type != MTD_NANDFLASH) {
- pr_info("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;
-
- pr_info("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)
- goto out;
- twopages = kmalloc(bufsize, GFP_KERNEL);
- if (!twopages)
- goto out;
- boundary = kmalloc(bufsize, GFP_KERNEL);
- if (!boundary)
- goto out;
-
- err = scan_for_bad_eraseblocks();
- if (err)
- goto out;
-
- /* Erase all eraseblocks */
- pr_info("erasing whole device\n");
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = erase_eraseblock(i);
- if (err)
- goto out;
- cond_resched();
- }
- pr_info("erased %u eraseblocks\n", i);
-
- /* Write all eraseblocks */
- prandom_seed_state(&rnd_state, 1);
- pr_info("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)
- pr_info("written up to eraseblock %u\n", i);
- cond_resched();
- }
- pr_info("written %u eraseblocks\n", i);
-
- /* Check all eraseblocks */
- prandom_seed_state(&rnd_state, 1);
- pr_info("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)
- pr_info("verified up to eraseblock %u\n", i);
- cond_resched();
- }
- pr_info("verified %u eraseblocks\n", i);
-
- err = crosstest();
- if (err)
- goto out;
-
- err = erasecrosstest();
- if (err)
- goto out;
-
- err = erasetest();
- if (err)
- goto out;
-
- pr_info("finished with %d errors\n", errcnt);
-out:
-
- kfree(bbt);
- kfree(boundary);
- kfree(twopages);
- kfree(writebuf);
- put_mtd_device(mtd);
- if (err)
- pr_info("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");
+++ /dev/null
-/*
- * Copyright (C) 2006-2008 Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; see the file COPYING. If not, write to the Free Software
- * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Check MTD device read.
- *
- * Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/err.h>
-#include <linux/mtd/mtd.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-
-static int dev = -EINVAL;
-module_param(dev, int, S_IRUGO);
-MODULE_PARM_DESC(dev, "MTD device number to use");
-
-static struct mtd_info *mtd;
-static unsigned char *iobuf;
-static unsigned char *iobuf1;
-static unsigned char *bbt;
-
-static int pgsize;
-static int ebcnt;
-static int pgcnt;
-
-static int read_eraseblock_by_page(int ebnum)
-{
- size_t read;
- int i, ret, err = 0;
- loff_t addr = ebnum * mtd->erasesize;
- void *buf = iobuf;
- void *oobbuf = iobuf1;
-
- for (i = 0; i < pgcnt; i++) {
- memset(buf, 0 , pgsize);
- ret = mtd_read(mtd, addr, pgsize, &read, buf);
- if (ret == -EUCLEAN)
- ret = 0;
- if (ret || read != pgsize) {
- pr_err("error: read failed at %#llx\n",
- (long long)addr);
- if (!err)
- err = ret;
- if (!err)
- err = -EINVAL;
- }
- if (mtd->oobsize) {
- struct mtd_oob_ops ops;
-
- ops.mode = MTD_OPS_PLACE_OOB;
- ops.len = 0;
- ops.retlen = 0;
- ops.ooblen = mtd->oobsize;
- ops.oobretlen = 0;
- ops.ooboffs = 0;
- ops.datbuf = NULL;
- ops.oobbuf = oobbuf;
- ret = mtd_read_oob(mtd, addr, &ops);
- if ((ret && !mtd_is_bitflip(ret)) ||
- ops.oobretlen != mtd->oobsize) {
- pr_err("error: read oob failed at "
- "%#llx\n", (long long)addr);
- if (!err)
- err = ret;
- if (!err)
- err = -EINVAL;
- }
- oobbuf += mtd->oobsize;
- }
- addr += pgsize;
- buf += pgsize;
- }
-
- return err;
-}
-
-static void dump_eraseblock(int ebnum)
-{
- int i, j, n;
- char line[128];
- int pg, oob;
-
- pr_info("dumping eraseblock %d\n", ebnum);
- n = mtd->erasesize;
- for (i = 0; i < n;) {
- char *p = line;
-
- p += sprintf(p, "%05x: ", i);
- for (j = 0; j < 32 && i < n; j++, i++)
- p += sprintf(p, "%02x", (unsigned int)iobuf[i]);
- printk(KERN_CRIT "%s\n", line);
- cond_resched();
- }
- if (!mtd->oobsize)
- return;
- pr_info("dumping oob from eraseblock %d\n", ebnum);
- n = mtd->oobsize;
- for (pg = 0, i = 0; pg < pgcnt; pg++)
- for (oob = 0; oob < n;) {
- char *p = line;
-
- p += sprintf(p, "%05x: ", i);
- for (j = 0; j < 32 && oob < n; j++, oob++, i++)
- p += sprintf(p, "%02x",
- (unsigned int)iobuf1[i]);
- printk(KERN_CRIT "%s\n", line);
- cond_resched();
- }
-}
-
-static int is_block_bad(int ebnum)
-{
- loff_t addr = ebnum * mtd->erasesize;
- int ret;
-
- ret = mtd_block_isbad(mtd, addr);
- if (ret)
- pr_info("block %d is bad\n", ebnum);
- return ret;
-}
-
-static int scan_for_bad_eraseblocks(void)
-{
- int i, bad = 0;
-
- bbt = kzalloc(ebcnt, GFP_KERNEL);
- if (!bbt)
- return -ENOMEM;
-
- if (!mtd_can_have_bb(mtd))
- return 0;
-
- pr_info("scanning for bad eraseblocks\n");
- for (i = 0; i < ebcnt; ++i) {
- bbt[i] = is_block_bad(i) ? 1 : 0;
- if (bbt[i])
- bad += 1;
- cond_resched();
- }
- pr_info("scanned %d eraseblocks, %d are bad\n", i, bad);
- return 0;
-}
-
-static int __init mtd_readtest_init(void)
-{
- uint64_t tmp;
- int err, i;
-
- printk(KERN_INFO "\n");
- printk(KERN_INFO "=================================================\n");
-
- if (dev < 0) {
- pr_info("Please specify a valid mtd-device via module parameter\n");
- return -EINVAL;
- }
-
- pr_info("MTD device: %d\n", dev);
-
- mtd = get_mtd_device(NULL, dev);
- if (IS_ERR(mtd)) {
- err = PTR_ERR(mtd);
- pr_err("error: Cannot get MTD device\n");
- return err;
- }
-
- if (mtd->writesize == 1) {
- pr_info("not NAND flash, assume page size is 512 "
- "bytes.\n");
- pgsize = 512;
- } else
- pgsize = mtd->writesize;
-
- tmp = mtd->size;
- do_div(tmp, mtd->erasesize);
- ebcnt = tmp;
- pgcnt = mtd->erasesize / pgsize;
-
- pr_info("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;
- iobuf = kmalloc(mtd->erasesize, GFP_KERNEL);
- if (!iobuf)
- goto out;
- iobuf1 = kmalloc(mtd->erasesize, GFP_KERNEL);
- if (!iobuf1)
- goto out;
-
- err = scan_for_bad_eraseblocks();
- if (err)
- goto out;
-
- /* Read all eraseblocks 1 page at a time */
- pr_info("testing page read\n");
- for (i = 0; i < ebcnt; ++i) {
- int ret;
-
- if (bbt[i])
- continue;
- ret = read_eraseblock_by_page(i);
- if (ret) {
- dump_eraseblock(i);
- if (!err)
- err = ret;
- }
- cond_resched();
- }
-
- if (err)
- pr_info("finished with errors\n");
- else
- pr_info("finished\n");
-
-out:
-
- kfree(iobuf);
- kfree(iobuf1);
- kfree(bbt);
- put_mtd_device(mtd);
- if (err)
- pr_info("error %d occurred\n", err);
- printk(KERN_INFO "=================================================\n");
- return err;
-}
-module_init(mtd_readtest_init);
-
-static void __exit mtd_readtest_exit(void)
-{
- return;
-}
-module_exit(mtd_readtest_exit);
-
-MODULE_DESCRIPTION("Read test module");
-MODULE_AUTHOR("Adrian Hunter");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * Copyright (C) 2007 Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; see the file COPYING. If not, write to the Free Software
- * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Test read and write speed of a MTD device.
- *
- * Author: Adrian Hunter <adrian.hunter@nokia.com>
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/err.h>
-#include <linux/mtd/mtd.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-#include <linux/random.h>
-
-static int dev = -EINVAL;
-module_param(dev, int, S_IRUGO);
-MODULE_PARM_DESC(dev, "MTD device number to use");
-
-static int count;
-module_param(count, int, S_IRUGO);
-MODULE_PARM_DESC(count, "Maximum number of eraseblocks to use "
- "(0 means use all)");
-
-static struct mtd_info *mtd;
-static unsigned char *iobuf;
-static unsigned char *bbt;
-
-static int pgsize;
-static int ebcnt;
-static int pgcnt;
-static int goodebcnt;
-static struct timeval start, finish;
-
-
-static int erase_eraseblock(int ebnum)
-{
- int err;
- struct erase_info ei;
- loff_t addr = ebnum * mtd->erasesize;
-
- memset(&ei, 0, sizeof(struct erase_info));
- ei.mtd = mtd;
- ei.addr = addr;
- ei.len = mtd->erasesize;
-
- err = mtd_erase(mtd, &ei);
- if (err) {
- pr_err("error %d while erasing EB %d\n", err, ebnum);
- return err;
- }
-
- if (ei.state == MTD_ERASE_FAILED) {
- pr_err("some erase error occurred at EB %d\n",
- ebnum);
- return -EIO;
- }
-
- return 0;
-}
-
-static int multiblock_erase(int ebnum, int blocks)
-{
- int err;
- struct erase_info ei;
- loff_t addr = ebnum * mtd->erasesize;
-
- memset(&ei, 0, sizeof(struct erase_info));
- ei.mtd = mtd;
- ei.addr = addr;
- ei.len = mtd->erasesize * blocks;
-
- err = mtd_erase(mtd, &ei);
- if (err) {
- pr_err("error %d while erasing EB %d, blocks %d\n",
- err, ebnum, blocks);
- return err;
- }
-
- if (ei.state == MTD_ERASE_FAILED) {
- pr_err("some erase error occurred at EB %d,"
- "blocks %d\n", ebnum, blocks);
- return -EIO;
- }
-
- return 0;
-}
-
-static int erase_whole_device(void)
-{
- int err;
- unsigned int i;
-
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = erase_eraseblock(i);
- if (err)
- return err;
- cond_resched();
- }
- return 0;
-}
-
-static int write_eraseblock(int ebnum)
-{
- size_t written;
- int err = 0;
- loff_t addr = ebnum * mtd->erasesize;
-
- err = mtd_write(mtd, addr, mtd->erasesize, &written, iobuf);
- if (err || written != mtd->erasesize) {
- pr_err("error: write failed at %#llx\n", addr);
- if (!err)
- err = -EINVAL;
- }
-
- return err;
-}
-
-static int write_eraseblock_by_page(int ebnum)
-{
- size_t written;
- int i, err = 0;
- loff_t addr = ebnum * mtd->erasesize;
- void *buf = iobuf;
-
- for (i = 0; i < pgcnt; i++) {
- err = mtd_write(mtd, addr, pgsize, &written, buf);
- if (err || written != pgsize) {
- pr_err("error: write failed at %#llx\n",
- addr);
- if (!err)
- err = -EINVAL;
- break;
- }
- addr += pgsize;
- buf += pgsize;
- }
-
- return err;
-}
-
-static int write_eraseblock_by_2pages(int ebnum)
-{
- size_t written, sz = pgsize * 2;
- int i, n = pgcnt / 2, err = 0;
- loff_t addr = ebnum * mtd->erasesize;
- void *buf = iobuf;
-
- for (i = 0; i < n; i++) {
- err = mtd_write(mtd, addr, sz, &written, buf);
- if (err || written != sz) {
- pr_err("error: write failed at %#llx\n",
- addr);
- if (!err)
- err = -EINVAL;
- return err;
- }
- addr += sz;
- buf += sz;
- }
- if (pgcnt % 2) {
- err = mtd_write(mtd, addr, pgsize, &written, buf);
- if (err || written != pgsize) {
- pr_err("error: write failed at %#llx\n",
- addr);
- if (!err)
- err = -EINVAL;
- }
- }
-
- return err;
-}
-
-static int read_eraseblock(int ebnum)
-{
- size_t read;
- int err = 0;
- loff_t addr = ebnum * mtd->erasesize;
-
- err = mtd_read(mtd, addr, mtd->erasesize, &read, iobuf);
- /* Ignore corrected ECC errors */
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != mtd->erasesize) {
- pr_err("error: read failed at %#llx\n", addr);
- if (!err)
- err = -EINVAL;
- }
-
- return err;
-}
-
-static int read_eraseblock_by_page(int ebnum)
-{
- size_t read;
- int i, err = 0;
- loff_t addr = ebnum * mtd->erasesize;
- void *buf = iobuf;
-
- for (i = 0; i < pgcnt; i++) {
- err = mtd_read(mtd, addr, pgsize, &read, buf);
- /* Ignore corrected ECC errors */
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != pgsize) {
- pr_err("error: read failed at %#llx\n",
- addr);
- if (!err)
- err = -EINVAL;
- break;
- }
- addr += pgsize;
- buf += pgsize;
- }
-
- return err;
-}
-
-static int read_eraseblock_by_2pages(int ebnum)
-{
- size_t read, sz = pgsize * 2;
- int i, n = pgcnt / 2, err = 0;
- loff_t addr = ebnum * mtd->erasesize;
- void *buf = iobuf;
-
- for (i = 0; i < n; i++) {
- err = mtd_read(mtd, addr, sz, &read, buf);
- /* Ignore corrected ECC errors */
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != sz) {
- pr_err("error: read failed at %#llx\n",
- addr);
- if (!err)
- err = -EINVAL;
- return err;
- }
- addr += sz;
- buf += sz;
- }
- if (pgcnt % 2) {
- err = mtd_read(mtd, addr, pgsize, &read, buf);
- /* Ignore corrected ECC errors */
- if (mtd_is_bitflip(err))
- err = 0;
- if (err || read != pgsize) {
- pr_err("error: read failed at %#llx\n",
- addr);
- if (!err)
- err = -EINVAL;
- }
- }
-
- return err;
-}
-
-static int is_block_bad(int ebnum)
-{
- loff_t addr = ebnum * mtd->erasesize;
- int ret;
-
- ret = mtd_block_isbad(mtd, addr);
- if (ret)
- pr_info("block %d is bad\n", ebnum);
- return ret;
-}
-
-static inline void start_timing(void)
-{
- do_gettimeofday(&start);
-}
-
-static inline void stop_timing(void)
-{
- do_gettimeofday(&finish);
-}
-
-static long calc_speed(void)
-{
- uint64_t k;
- long ms;
-
- ms = (finish.tv_sec - start.tv_sec) * 1000 +
- (finish.tv_usec - start.tv_usec) / 1000;
- if (ms == 0)
- return 0;
- k = goodebcnt * (mtd->erasesize / 1024) * 1000;
- do_div(k, ms);
- return k;
-}
-
-static int scan_for_bad_eraseblocks(void)
-{
- int i, bad = 0;
-
- bbt = kzalloc(ebcnt, GFP_KERNEL);
- if (!bbt)
- return -ENOMEM;
-
- if (!mtd_can_have_bb(mtd))
- goto out;
-
- pr_info("scanning for bad eraseblocks\n");
- for (i = 0; i < ebcnt; ++i) {
- bbt[i] = is_block_bad(i) ? 1 : 0;
- if (bbt[i])
- bad += 1;
- cond_resched();
- }
- pr_info("scanned %d eraseblocks, %d are bad\n", i, bad);
-out:
- goodebcnt = ebcnt - bad;
- return 0;
-}
-
-static int __init mtd_speedtest_init(void)
-{
- int err, i, blocks, j, k;
- long speed;
- uint64_t tmp;
-
- printk(KERN_INFO "\n");
- printk(KERN_INFO "=================================================\n");
-
- if (dev < 0) {
- pr_info("Please specify a valid mtd-device via module parameter\n");
- pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
- return -EINVAL;
- }
-
- if (count)
- pr_info("MTD device: %d count: %d\n", dev, count);
- else
- pr_info("MTD device: %d\n", dev);
-
- mtd = get_mtd_device(NULL, dev);
- if (IS_ERR(mtd)) {
- err = PTR_ERR(mtd);
- pr_err("error: cannot get MTD device\n");
- return err;
- }
-
- if (mtd->writesize == 1) {
- pr_info("not NAND flash, assume page size is 512 "
- "bytes.\n");
- pgsize = 512;
- } else
- pgsize = mtd->writesize;
-
- tmp = mtd->size;
- do_div(tmp, mtd->erasesize);
- ebcnt = tmp;
- pgcnt = mtd->erasesize / pgsize;
-
- pr_info("MTD device size %llu, eraseblock size %u, "
- "page size %u, count of eraseblocks %u, pages per "
- "eraseblock %u, OOB size %u\n",
- (unsigned long long)mtd->size, mtd->erasesize,
- pgsize, ebcnt, pgcnt, mtd->oobsize);
-
- if (count > 0 && count < ebcnt)
- ebcnt = count;
-
- err = -ENOMEM;
- iobuf = kmalloc(mtd->erasesize, GFP_KERNEL);
- if (!iobuf)
- goto out;
-
- prandom_bytes(iobuf, mtd->erasesize);
-
- err = scan_for_bad_eraseblocks();
- if (err)
- goto out;
-
- err = erase_whole_device();
- if (err)
- goto out;
-
- /* Write all eraseblocks, 1 eraseblock at a time */
- pr_info("testing eraseblock write speed\n");
- start_timing();
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = write_eraseblock(i);
- if (err)
- goto out;
- cond_resched();
- }
- stop_timing();
- speed = calc_speed();
- pr_info("eraseblock write speed is %ld KiB/s\n", speed);
-
- /* Read all eraseblocks, 1 eraseblock at a time */
- pr_info("testing eraseblock read speed\n");
- start_timing();
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = read_eraseblock(i);
- if (err)
- goto out;
- cond_resched();
- }
- stop_timing();
- speed = calc_speed();
- pr_info("eraseblock read speed is %ld KiB/s\n", speed);
-
- err = erase_whole_device();
- if (err)
- goto out;
-
- /* Write all eraseblocks, 1 page at a time */
- pr_info("testing page write speed\n");
- start_timing();
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = write_eraseblock_by_page(i);
- if (err)
- goto out;
- cond_resched();
- }
- stop_timing();
- speed = calc_speed();
- pr_info("page write speed is %ld KiB/s\n", speed);
-
- /* Read all eraseblocks, 1 page at a time */
- pr_info("testing page read speed\n");
- start_timing();
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = read_eraseblock_by_page(i);
- if (err)
- goto out;
- cond_resched();
- }
- stop_timing();
- speed = calc_speed();
- pr_info("page read speed is %ld KiB/s\n", speed);
-
- err = erase_whole_device();
- if (err)
- goto out;
-
- /* Write all eraseblocks, 2 pages at a time */
- pr_info("testing 2 page write speed\n");
- start_timing();
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = write_eraseblock_by_2pages(i);
- if (err)
- goto out;
- cond_resched();
- }
- stop_timing();
- speed = calc_speed();
- pr_info("2 page write speed is %ld KiB/s\n", speed);
-
- /* Read all eraseblocks, 2 pages at a time */
- pr_info("testing 2 page read speed\n");
- start_timing();
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = read_eraseblock_by_2pages(i);
- if (err)
- goto out;
- cond_resched();
- }
- stop_timing();
- speed = calc_speed();
- pr_info("2 page read speed is %ld KiB/s\n", speed);
-
- /* Erase all eraseblocks */
- pr_info("Testing erase speed\n");
- start_timing();
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = erase_eraseblock(i);
- if (err)
- goto out;
- cond_resched();
- }
- stop_timing();
- speed = calc_speed();
- pr_info("erase speed is %ld KiB/s\n", speed);
-
- /* Multi-block erase all eraseblocks */
- for (k = 1; k < 7; k++) {
- blocks = 1 << k;
- pr_info("Testing %dx multi-block erase speed\n",
- blocks);
- start_timing();
- for (i = 0; i < ebcnt; ) {
- for (j = 0; j < blocks && (i + j) < ebcnt; j++)
- if (bbt[i + j])
- break;
- if (j < 1) {
- i++;
- continue;
- }
- err = multiblock_erase(i, j);
- if (err)
- goto out;
- cond_resched();
- i += j;
- }
- stop_timing();
- speed = calc_speed();
- pr_info("%dx multi-block erase speed is %ld KiB/s\n",
- blocks, speed);
- }
- pr_info("finished\n");
-out:
- kfree(iobuf);
- kfree(bbt);
- put_mtd_device(mtd);
- if (err)
- pr_info("error %d occurred\n", err);
- printk(KERN_INFO "=================================================\n");
- return err;
-}
-module_init(mtd_speedtest_init);
-
-static void __exit mtd_speedtest_exit(void)
-{
- return;
-}
-module_exit(mtd_speedtest_exit);
-
-MODULE_DESCRIPTION("Speed test module");
-MODULE_AUTHOR("Adrian Hunter");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * Copyright (C) 2006-2008 Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; see the file COPYING. If not, write to the Free Software
- * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Test random reads, writes and erases on MTD device.
- *
- * Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/err.h>
-#include <linux/mtd/mtd.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-#include <linux/vmalloc.h>
-#include <linux/random.h>
-
-static int dev = -EINVAL;
-module_param(dev, int, S_IRUGO);
-MODULE_PARM_DESC(dev, "MTD device number to use");
-
-static int count = 10000;
-module_param(count, int, S_IRUGO);
-MODULE_PARM_DESC(count, "Number of operations to do (default is 10000)");
-
-static struct mtd_info *mtd;
-static unsigned char *writebuf;
-static unsigned char *readbuf;
-static unsigned char *bbt;
-static int *offsets;
-
-static int pgsize;
-static int bufsize;
-static int ebcnt;
-static int pgcnt;
-
-static int rand_eb(void)
-{
- unsigned int eb;
-
-again:
- eb = prandom_u32();
- /* Read or write up 2 eraseblocks at a time - hence 'ebcnt - 1' */
- eb %= (ebcnt - 1);
- if (bbt[eb])
- goto again;
- return eb;
-}
-
-static int rand_offs(void)
-{
- unsigned int offs;
-
- offs = prandom_u32();
- offs %= bufsize;
- return offs;
-}
-
-static int rand_len(int offs)
-{
- unsigned int len;
-
- len = prandom_u32();
- len %= (bufsize - offs);
- return len;
-}
-
-static int erase_eraseblock(int ebnum)
-{
- int err;
- struct erase_info ei;
- loff_t addr = ebnum * mtd->erasesize;
-
- memset(&ei, 0, sizeof(struct erase_info));
- ei.mtd = mtd;
- ei.addr = addr;
- ei.len = mtd->erasesize;
-
- err = mtd_erase(mtd, &ei);
- if (unlikely(err)) {
- pr_err("error %d while erasing EB %d\n", err, ebnum);
- return err;
- }
-
- if (unlikely(ei.state == MTD_ERASE_FAILED)) {
- pr_err("some erase error occurred at EB %d\n",
- ebnum);
- return -EIO;
- }
-
- return 0;
-}
-
-static int is_block_bad(int ebnum)
-{
- loff_t addr = ebnum * mtd->erasesize;
- int ret;
-
- ret = mtd_block_isbad(mtd, addr);
- if (ret)
- pr_info("block %d is bad\n", ebnum);
- return ret;
-}
-
-static int do_read(void)
-{
- size_t read;
- int eb = rand_eb();
- int offs = rand_offs();
- int len = rand_len(offs), err;
- loff_t addr;
-
- if (bbt[eb + 1]) {
- if (offs >= mtd->erasesize)
- offs -= mtd->erasesize;
- if (offs + len > mtd->erasesize)
- len = mtd->erasesize - offs;
- }
- addr = eb * mtd->erasesize + offs;
- err = mtd_read(mtd, addr, len, &read, readbuf);
- if (mtd_is_bitflip(err))
- err = 0;
- if (unlikely(err || read != len)) {
- pr_err("error: read failed at 0x%llx\n",
- (long long)addr);
- if (!err)
- err = -EINVAL;
- return err;
- }
- return 0;
-}
-
-static int do_write(void)
-{
- int eb = rand_eb(), offs, err, len;
- size_t written;
- loff_t addr;
-
- offs = offsets[eb];
- if (offs >= mtd->erasesize) {
- err = erase_eraseblock(eb);
- if (err)
- return err;
- offs = offsets[eb] = 0;
- }
- len = rand_len(offs);
- len = ((len + pgsize - 1) / pgsize) * pgsize;
- if (offs + len > mtd->erasesize) {
- if (bbt[eb + 1])
- len = mtd->erasesize - offs;
- else {
- err = erase_eraseblock(eb + 1);
- if (err)
- return err;
- offsets[eb + 1] = 0;
- }
- }
- addr = eb * mtd->erasesize + offs;
- err = mtd_write(mtd, addr, len, &written, writebuf);
- if (unlikely(err || written != len)) {
- pr_err("error: write failed at 0x%llx\n",
- (long long)addr);
- if (!err)
- err = -EINVAL;
- return err;
- }
- offs += len;
- while (offs > mtd->erasesize) {
- offsets[eb++] = mtd->erasesize;
- offs -= mtd->erasesize;
- }
- offsets[eb] = offs;
- return 0;
-}
-
-static int do_operation(void)
-{
- if (prandom_u32() & 1)
- return do_read();
- else
- return do_write();
-}
-
-static int scan_for_bad_eraseblocks(void)
-{
- int i, bad = 0;
-
- bbt = kzalloc(ebcnt, GFP_KERNEL);
- if (!bbt)
- return -ENOMEM;
-
- if (!mtd_can_have_bb(mtd))
- return 0;
-
- pr_info("scanning for bad eraseblocks\n");
- for (i = 0; i < ebcnt; ++i) {
- bbt[i] = is_block_bad(i) ? 1 : 0;
- if (bbt[i])
- bad += 1;
- cond_resched();
- }
- pr_info("scanned %d eraseblocks, %d are bad\n", i, bad);
- return 0;
-}
-
-static int __init mtd_stresstest_init(void)
-{
- int err;
- int i, op;
- uint64_t tmp;
-
- printk(KERN_INFO "\n");
- printk(KERN_INFO "=================================================\n");
-
- if (dev < 0) {
- pr_info("Please specify a valid mtd-device via module parameter\n");
- pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
- return -EINVAL;
- }
-
- pr_info("MTD device: %d\n", dev);
-
- mtd = get_mtd_device(NULL, dev);
- if (IS_ERR(mtd)) {
- err = PTR_ERR(mtd);
- pr_err("error: cannot get MTD device\n");
- return err;
- }
-
- if (mtd->writesize == 1) {
- pr_info("not NAND flash, assume page size is 512 "
- "bytes.\n");
- pgsize = 512;
- } else
- pgsize = mtd->writesize;
-
- tmp = mtd->size;
- do_div(tmp, mtd->erasesize);
- ebcnt = tmp;
- pgcnt = mtd->erasesize / pgsize;
-
- pr_info("MTD device size %llu, eraseblock size %u, "
- "page size %u, count of eraseblocks %u, pages per "
- "eraseblock %u, OOB size %u\n",
- (unsigned long long)mtd->size, mtd->erasesize,
- pgsize, ebcnt, pgcnt, mtd->oobsize);
-
- if (ebcnt < 2) {
- pr_err("error: need at least 2 eraseblocks\n");
- err = -ENOSPC;
- goto out_put_mtd;
- }
-
- /* Read or write up 2 eraseblocks at a time */
- bufsize = mtd->erasesize * 2;
-
- err = -ENOMEM;
- readbuf = vmalloc(bufsize);
- writebuf = vmalloc(bufsize);
- offsets = kmalloc(ebcnt * sizeof(int), GFP_KERNEL);
- if (!readbuf || !writebuf || !offsets)
- goto out;
- for (i = 0; i < ebcnt; i++)
- offsets[i] = mtd->erasesize;
- prandom_bytes(writebuf, bufsize);
-
- err = scan_for_bad_eraseblocks();
- if (err)
- goto out;
-
- /* Do operations */
- pr_info("doing operations\n");
- for (op = 0; op < count; op++) {
- if ((op & 1023) == 0)
- pr_info("%d operations done\n", op);
- err = do_operation();
- if (err)
- goto out;
- cond_resched();
- }
- pr_info("finished, %d operations done\n", op);
-
-out:
- kfree(offsets);
- kfree(bbt);
- vfree(writebuf);
- vfree(readbuf);
-out_put_mtd:
- put_mtd_device(mtd);
- if (err)
- pr_info("error %d occurred\n", err);
- printk(KERN_INFO "=================================================\n");
- return err;
-}
-module_init(mtd_stresstest_init);
-
-static void __exit mtd_stresstest_exit(void)
-{
- return;
-}
-module_exit(mtd_stresstest_exit);
-
-MODULE_DESCRIPTION("Stress test module");
-MODULE_AUTHOR("Adrian Hunter");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * Copyright (C) 2006-2007 Nokia Corporation
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; see the file COPYING. If not, write to the Free Software
- * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Test sub-page read and write on MTD device.
- * Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
- *
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/err.h>
-#include <linux/mtd/mtd.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-#include <linux/random.h>
-
-static int dev = -EINVAL;
-module_param(dev, int, S_IRUGO);
-MODULE_PARM_DESC(dev, "MTD device number to use");
-
-static struct mtd_info *mtd;
-static unsigned char *writebuf;
-static unsigned char *readbuf;
-static unsigned char *bbt;
-
-static int subpgsize;
-static int bufsize;
-static int ebcnt;
-static int pgcnt;
-static int errcnt;
-static struct rnd_state rnd_state;
-
-static inline void clear_data(unsigned char *buf, size_t len)
-{
- memset(buf, 0, len);
-}
-
-static int erase_eraseblock(int ebnum)
-{
- int err;
- struct erase_info ei;
- loff_t addr = ebnum * mtd->erasesize;
-
- memset(&ei, 0, sizeof(struct erase_info));
- ei.mtd = mtd;
- ei.addr = addr;
- ei.len = mtd->erasesize;
-
- err = mtd_erase(mtd, &ei);
- if (err) {
- pr_err("error %d while erasing EB %d\n", err, ebnum);
- return err;
- }
-
- if (ei.state == MTD_ERASE_FAILED) {
- pr_err("some erase error occurred at EB %d\n",
- ebnum);
- return -EIO;
- }
-
- return 0;
-}
-
-static int erase_whole_device(void)
-{
- int err;
- unsigned int i;
-
- pr_info("erasing whole device\n");
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = erase_eraseblock(i);
- if (err)
- return err;
- cond_resched();
- }
- pr_info("erased %u eraseblocks\n", i);
- return 0;
-}
-
-static int write_eraseblock(int ebnum)
-{
- size_t written;
- int err = 0;
- loff_t addr = ebnum * mtd->erasesize;
-
- prandom_bytes_state(&rnd_state, writebuf, subpgsize);
- err = mtd_write(mtd, addr, subpgsize, &written, writebuf);
- if (unlikely(err || written != subpgsize)) {
- pr_err("error: write failed at %#llx\n",
- (long long)addr);
- if (written != subpgsize) {
- pr_err(" write size: %#x\n", subpgsize);
- pr_err(" written: %#zx\n", written);
- }
- return err ? err : -1;
- }
-
- addr += subpgsize;
-
- prandom_bytes_state(&rnd_state, writebuf, subpgsize);
- err = mtd_write(mtd, addr, subpgsize, &written, writebuf);
- if (unlikely(err || written != subpgsize)) {
- pr_err("error: write failed at %#llx\n",
- (long long)addr);
- if (written != subpgsize) {
- pr_err(" write size: %#x\n", subpgsize);
- pr_err(" written: %#zx\n", written);
- }
- return err ? err : -1;
- }
-
- return err;
-}
-
-static int write_eraseblock2(int ebnum)
-{
- size_t written;
- int err = 0, k;
- loff_t addr = ebnum * mtd->erasesize;
-
- for (k = 1; k < 33; ++k) {
- if (addr + (subpgsize * k) > (ebnum + 1) * mtd->erasesize)
- break;
- prandom_bytes_state(&rnd_state, writebuf, subpgsize * k);
- err = mtd_write(mtd, addr, subpgsize * k, &written, writebuf);
- if (unlikely(err || written != subpgsize * k)) {
- pr_err("error: write failed at %#llx\n",
- (long long)addr);
- if (written != subpgsize) {
- pr_err(" write size: %#x\n",
- subpgsize * k);
- pr_err(" written: %#08zx\n",
- written);
- }
- return err ? err : -1;
- }
- addr += subpgsize * k;
- }
-
- return err;
-}
-
-static void print_subpage(unsigned char *p)
-{
- int i, j;
-
- for (i = 0; i < subpgsize; ) {
- for (j = 0; i < subpgsize && j < 32; ++i, ++j)
- printk("%02x", *p++);
- printk("\n");
- }
-}
-
-static int verify_eraseblock(int ebnum)
-{
- size_t read;
- int err = 0;
- loff_t addr = ebnum * mtd->erasesize;
-
- prandom_bytes_state(&rnd_state, writebuf, subpgsize);
- clear_data(readbuf, subpgsize);
- err = mtd_read(mtd, addr, subpgsize, &read, readbuf);
- if (unlikely(err || read != subpgsize)) {
- if (mtd_is_bitflip(err) && read == subpgsize) {
- pr_info("ECC correction at %#llx\n",
- (long long)addr);
- err = 0;
- } else {
- pr_err("error: read failed at %#llx\n",
- (long long)addr);
- return err ? err : -1;
- }
- }
- if (unlikely(memcmp(readbuf, writebuf, subpgsize))) {
- pr_err("error: verify failed at %#llx\n",
- (long long)addr);
- pr_info("------------- written----------------\n");
- print_subpage(writebuf);
- pr_info("------------- read ------------------\n");
- print_subpage(readbuf);
- pr_info("-------------------------------------\n");
- errcnt += 1;
- }
-
- addr += subpgsize;
-
- prandom_bytes_state(&rnd_state, writebuf, subpgsize);
- clear_data(readbuf, subpgsize);
- err = mtd_read(mtd, addr, subpgsize, &read, readbuf);
- if (unlikely(err || read != subpgsize)) {
- if (mtd_is_bitflip(err) && read == subpgsize) {
- pr_info("ECC correction at %#llx\n",
- (long long)addr);
- err = 0;
- } else {
- pr_err("error: read failed at %#llx\n",
- (long long)addr);
- return err ? err : -1;
- }
- }
- if (unlikely(memcmp(readbuf, writebuf, subpgsize))) {
- pr_info("error: verify failed at %#llx\n",
- (long long)addr);
- pr_info("------------- written----------------\n");
- print_subpage(writebuf);
- pr_info("------------- read ------------------\n");
- print_subpage(readbuf);
- pr_info("-------------------------------------\n");
- errcnt += 1;
- }
-
- return err;
-}
-
-static int verify_eraseblock2(int ebnum)
-{
- size_t read;
- int err = 0, k;
- loff_t addr = ebnum * mtd->erasesize;
-
- for (k = 1; k < 33; ++k) {
- if (addr + (subpgsize * k) > (ebnum + 1) * mtd->erasesize)
- break;
- prandom_bytes_state(&rnd_state, writebuf, subpgsize * k);
- clear_data(readbuf, subpgsize * k);
- err = mtd_read(mtd, addr, subpgsize * k, &read, readbuf);
- if (unlikely(err || read != subpgsize * k)) {
- if (mtd_is_bitflip(err) && read == subpgsize * k) {
- pr_info("ECC correction at %#llx\n",
- (long long)addr);
- err = 0;
- } else {
- pr_err("error: read failed at "
- "%#llx\n", (long long)addr);
- return err ? err : -1;
- }
- }
- if (unlikely(memcmp(readbuf, writebuf, subpgsize * k))) {
- pr_err("error: verify failed at %#llx\n",
- (long long)addr);
- errcnt += 1;
- }
- addr += subpgsize * k;
- }
-
- return err;
-}
-
-static int verify_eraseblock_ff(int ebnum)
-{
- uint32_t j;
- size_t read;
- int err = 0;
- loff_t addr = ebnum * mtd->erasesize;
-
- memset(writebuf, 0xff, subpgsize);
- for (j = 0; j < mtd->erasesize / subpgsize; ++j) {
- clear_data(readbuf, subpgsize);
- err = mtd_read(mtd, addr, subpgsize, &read, readbuf);
- if (unlikely(err || read != subpgsize)) {
- if (mtd_is_bitflip(err) && read == subpgsize) {
- pr_info("ECC correction at %#llx\n",
- (long long)addr);
- err = 0;
- } else {
- pr_err("error: read failed at "
- "%#llx\n", (long long)addr);
- return err ? err : -1;
- }
- }
- if (unlikely(memcmp(readbuf, writebuf, subpgsize))) {
- pr_err("error: verify 0xff failed at "
- "%#llx\n", (long long)addr);
- errcnt += 1;
- }
- addr += subpgsize;
- }
-
- return err;
-}
-
-static int verify_all_eraseblocks_ff(void)
-{
- int err;
- unsigned int i;
-
- pr_info("verifying all eraseblocks for 0xff\n");
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = verify_eraseblock_ff(i);
- if (err)
- return err;
- if (i % 256 == 0)
- pr_info("verified up to eraseblock %u\n", i);
- cond_resched();
- }
- pr_info("verified %u eraseblocks\n", i);
- return 0;
-}
-
-static int is_block_bad(int ebnum)
-{
- loff_t addr = ebnum * mtd->erasesize;
- int ret;
-
- ret = mtd_block_isbad(mtd, addr);
- if (ret)
- pr_info("block %d is bad\n", ebnum);
- return ret;
-}
-
-static int scan_for_bad_eraseblocks(void)
-{
- int i, bad = 0;
-
- bbt = kzalloc(ebcnt, GFP_KERNEL);
- if (!bbt)
- return -ENOMEM;
-
- pr_info("scanning for bad eraseblocks\n");
- for (i = 0; i < ebcnt; ++i) {
- bbt[i] = is_block_bad(i) ? 1 : 0;
- if (bbt[i])
- bad += 1;
- cond_resched();
- }
- pr_info("scanned %d eraseblocks, %d are bad\n", i, bad);
- return 0;
-}
-
-static int __init mtd_subpagetest_init(void)
-{
- int err = 0;
- uint32_t i;
- uint64_t tmp;
-
- printk(KERN_INFO "\n");
- printk(KERN_INFO "=================================================\n");
-
- if (dev < 0) {
- pr_info("Please specify a valid mtd-device via module parameter\n");
- pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
- return -EINVAL;
- }
-
- pr_info("MTD device: %d\n", dev);
-
- mtd = get_mtd_device(NULL, dev);
- if (IS_ERR(mtd)) {
- err = PTR_ERR(mtd);
- pr_err("error: cannot get MTD device\n");
- return err;
- }
-
- if (mtd->type != MTD_NANDFLASH) {
- pr_info("this test requires NAND flash\n");
- goto out;
- }
-
- subpgsize = mtd->writesize >> mtd->subpage_sft;
- tmp = mtd->size;
- do_div(tmp, mtd->erasesize);
- ebcnt = tmp;
- pgcnt = mtd->erasesize / mtd->writesize;
-
- pr_info("MTD device size %llu, eraseblock size %u, "
- "page size %u, subpage size %u, count of eraseblocks %u, "
- "pages per eraseblock %u, OOB size %u\n",
- (unsigned long long)mtd->size, mtd->erasesize,
- mtd->writesize, subpgsize, ebcnt, pgcnt, mtd->oobsize);
-
- err = -ENOMEM;
- bufsize = subpgsize * 32;
- writebuf = kmalloc(bufsize, GFP_KERNEL);
- if (!writebuf)
- goto out;
- readbuf = kmalloc(bufsize, GFP_KERNEL);
- if (!readbuf)
- goto out;
-
- err = scan_for_bad_eraseblocks();
- if (err)
- goto out;
-
- err = erase_whole_device();
- if (err)
- goto out;
-
- pr_info("writing whole device\n");
- prandom_seed_state(&rnd_state, 1);
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = write_eraseblock(i);
- if (unlikely(err))
- goto out;
- if (i % 256 == 0)
- pr_info("written up to eraseblock %u\n", i);
- cond_resched();
- }
- pr_info("written %u eraseblocks\n", i);
-
- prandom_seed_state(&rnd_state, 1);
- pr_info("verifying all eraseblocks\n");
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = verify_eraseblock(i);
- if (unlikely(err))
- goto out;
- if (i % 256 == 0)
- pr_info("verified up to eraseblock %u\n", i);
- cond_resched();
- }
- pr_info("verified %u eraseblocks\n", i);
-
- err = erase_whole_device();
- if (err)
- goto out;
-
- err = verify_all_eraseblocks_ff();
- if (err)
- goto out;
-
- /* Write all eraseblocks */
- prandom_seed_state(&rnd_state, 3);
- pr_info("writing whole device\n");
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = write_eraseblock2(i);
- if (unlikely(err))
- goto out;
- if (i % 256 == 0)
- pr_info("written up to eraseblock %u\n", i);
- cond_resched();
- }
- pr_info("written %u eraseblocks\n", i);
-
- /* Check all eraseblocks */
- prandom_seed_state(&rnd_state, 3);
- pr_info("verifying all eraseblocks\n");
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = verify_eraseblock2(i);
- if (unlikely(err))
- goto out;
- if (i % 256 == 0)
- pr_info("verified up to eraseblock %u\n", i);
- cond_resched();
- }
- pr_info("verified %u eraseblocks\n", i);
-
- err = erase_whole_device();
- if (err)
- goto out;
-
- err = verify_all_eraseblocks_ff();
- if (err)
- goto out;
-
- pr_info("finished with %d errors\n", errcnt);
-
-out:
- kfree(bbt);
- kfree(readbuf);
- kfree(writebuf);
- put_mtd_device(mtd);
- if (err)
- pr_info("error %d occurred\n", err);
- printk(KERN_INFO "=================================================\n");
- return err;
-}
-module_init(mtd_subpagetest_init);
-
-static void __exit mtd_subpagetest_exit(void)
-{
- return;
-}
-module_exit(mtd_subpagetest_exit);
-
-MODULE_DESCRIPTION("Subpage test module");
-MODULE_AUTHOR("Adrian Hunter");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * Copyright (C) 2006-2008 Artem Bityutskiy
- * Copyright (C) 2006-2008 Jarkko Lavinen
- * Copyright (C) 2006-2008 Adrian Hunter
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; see the file COPYING. If not, write to the Free Software
- * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Authors: Artem Bityutskiy, Jarkko Lavinen, Adria Hunter
- *
- * WARNING: this test program may kill your flash and your device. Do not
- * use it unless you know what you do. Authors are not responsible for any
- * damage caused by this program.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/err.h>
-#include <linux/mtd/mtd.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-
-#define RETRIES 3
-
-static int eb = 8;
-module_param(eb, int, S_IRUGO);
-MODULE_PARM_DESC(eb, "eraseblock number within the selected MTD device");
-
-static int ebcnt = 32;
-module_param(ebcnt, int, S_IRUGO);
-MODULE_PARM_DESC(ebcnt, "number of consecutive eraseblocks to torture");
-
-static int pgcnt;
-module_param(pgcnt, int, S_IRUGO);
-MODULE_PARM_DESC(pgcnt, "number of pages per eraseblock to torture (0 => all)");
-
-static int dev = -EINVAL;
-module_param(dev, int, S_IRUGO);
-MODULE_PARM_DESC(dev, "MTD device number to use");
-
-static int gran = 512;
-module_param(gran, int, S_IRUGO);
-MODULE_PARM_DESC(gran, "how often the status information should be printed");
-
-static int check = 1;
-module_param(check, int, S_IRUGO);
-MODULE_PARM_DESC(check, "if the written data should be checked");
-
-static unsigned int cycles_count;
-module_param(cycles_count, uint, S_IRUGO);
-MODULE_PARM_DESC(cycles_count, "how many erase cycles to do "
- "(infinite by default)");
-
-static struct mtd_info *mtd;
-
-/* This buffer contains 0x555555...0xAAAAAA... pattern */
-static unsigned char *patt_5A5;
-/* This buffer contains 0xAAAAAA...0x555555... pattern */
-static unsigned char *patt_A5A;
-/* This buffer contains all 0xFF bytes */
-static unsigned char *patt_FF;
-/* This a temporary buffer is use when checking data */
-static unsigned char *check_buf;
-/* How many erase cycles were done */
-static unsigned int erase_cycles;
-
-static int pgsize;
-static struct timeval start, finish;
-
-static void report_corrupt(unsigned char *read, unsigned char *written);
-
-static inline void start_timing(void)
-{
- do_gettimeofday(&start);
-}
-
-static inline void stop_timing(void)
-{
- do_gettimeofday(&finish);
-}
-
-/*
- * Erase eraseblock number @ebnum.
- */
-static inline int erase_eraseblock(int ebnum)
-{
- int err;
- struct erase_info ei;
- loff_t addr = ebnum * mtd->erasesize;
-
- memset(&ei, 0, sizeof(struct erase_info));
- ei.mtd = mtd;
- ei.addr = addr;
- ei.len = mtd->erasesize;
-
- err = mtd_erase(mtd, &ei);
- if (err) {
- pr_err("error %d while erasing EB %d\n", err, ebnum);
- return err;
- }
-
- if (ei.state == MTD_ERASE_FAILED) {
- pr_err("some erase error occurred at EB %d\n",
- ebnum);
- return -EIO;
- }
-
- return 0;
-}
-
-/*
- * Check that the contents of eraseblock number @enbum is equivalent to the
- * @buf buffer.
- */
-static inline int check_eraseblock(int ebnum, unsigned char *buf)
-{
- int err, retries = 0;
- size_t read;
- loff_t addr = ebnum * mtd->erasesize;
- size_t len = mtd->erasesize;
-
- if (pgcnt) {
- addr = (ebnum + 1) * mtd->erasesize - pgcnt * pgsize;
- len = pgcnt * pgsize;
- }
-
-retry:
- err = mtd_read(mtd, addr, len, &read, check_buf);
- if (mtd_is_bitflip(err))
- pr_err("single bit flip occurred at EB %d "
- "MTD reported that it was fixed.\n", ebnum);
- else if (err) {
- pr_err("error %d while reading EB %d, "
- "read %zd\n", err, ebnum, read);
- return err;
- }
-
- if (read != len) {
- pr_err("failed to read %zd bytes from EB %d, "
- "read only %zd, but no error reported\n",
- len, ebnum, read);
- return -EIO;
- }
-
- if (memcmp(buf, check_buf, len)) {
- pr_err("read wrong data from EB %d\n", ebnum);
- report_corrupt(check_buf, buf);
-
- if (retries++ < RETRIES) {
- /* Try read again */
- yield();
- pr_info("re-try reading data from EB %d\n",
- ebnum);
- goto retry;
- } else {
- pr_info("retried %d times, still errors, "
- "give-up\n", RETRIES);
- return -EINVAL;
- }
- }
-
- if (retries != 0)
- pr_info("only attempt number %d was OK (!!!)\n",
- retries);
-
- return 0;
-}
-
-static inline int write_pattern(int ebnum, void *buf)
-{
- int err;
- size_t written;
- loff_t addr = ebnum * mtd->erasesize;
- size_t len = mtd->erasesize;
-
- if (pgcnt) {
- addr = (ebnum + 1) * mtd->erasesize - pgcnt * pgsize;
- len = pgcnt * pgsize;
- }
- err = mtd_write(mtd, addr, len, &written, buf);
- if (err) {
- pr_err("error %d while writing EB %d, written %zd"
- " bytes\n", err, ebnum, written);
- return err;
- }
- if (written != len) {
- pr_info("written only %zd bytes of %zd, but no error"
- " reported\n", written, len);
- return -EIO;
- }
-
- return 0;
-}
-
-static int __init tort_init(void)
-{
- int err = 0, i, infinite = !cycles_count;
- int *bad_ebs;
-
- printk(KERN_INFO "\n");
- printk(KERN_INFO "=================================================\n");
- pr_info("Warning: this program is trying to wear out your "
- "flash, stop it if this is not wanted.\n");
-
- if (dev < 0) {
- pr_info("Please specify a valid mtd-device via module parameter\n");
- pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
- return -EINVAL;
- }
-
- pr_info("MTD device: %d\n", dev);
- pr_info("torture %d eraseblocks (%d-%d) of mtd%d\n",
- ebcnt, eb, eb + ebcnt - 1, dev);
- if (pgcnt)
- pr_info("torturing just %d pages per eraseblock\n",
- pgcnt);
- pr_info("write verify %s\n", check ? "enabled" : "disabled");
-
- mtd = get_mtd_device(NULL, dev);
- if (IS_ERR(mtd)) {
- err = PTR_ERR(mtd);
- pr_err("error: cannot get MTD device\n");
- return err;
- }
-
- if (mtd->writesize == 1) {
- pr_info("not NAND flash, assume page size is 512 "
- "bytes.\n");
- pgsize = 512;
- } else
- pgsize = mtd->writesize;
-
- if (pgcnt && (pgcnt > mtd->erasesize / pgsize || pgcnt < 0)) {
- pr_err("error: invalid pgcnt value %d\n", pgcnt);
- goto out_mtd;
- }
-
- err = -ENOMEM;
- patt_5A5 = kmalloc(mtd->erasesize, GFP_KERNEL);
- if (!patt_5A5)
- goto out_mtd;
-
- patt_A5A = kmalloc(mtd->erasesize, GFP_KERNEL);
- if (!patt_A5A)
- goto out_patt_5A5;
-
- patt_FF = kmalloc(mtd->erasesize, GFP_KERNEL);
- if (!patt_FF)
- goto out_patt_A5A;
-
- check_buf = kmalloc(mtd->erasesize, GFP_KERNEL);
- if (!check_buf)
- goto out_patt_FF;
-
- bad_ebs = kcalloc(ebcnt, sizeof(*bad_ebs), GFP_KERNEL);
- if (!bad_ebs)
- goto out_check_buf;
-
- err = 0;
-
- /* Initialize patterns */
- memset(patt_FF, 0xFF, mtd->erasesize);
- for (i = 0; i < mtd->erasesize / pgsize; i++) {
- if (!(i & 1)) {
- memset(patt_5A5 + i * pgsize, 0x55, pgsize);
- memset(patt_A5A + i * pgsize, 0xAA, pgsize);
- } else {
- memset(patt_5A5 + i * pgsize, 0xAA, pgsize);
- memset(patt_A5A + i * pgsize, 0x55, pgsize);
- }
- }
-
- /*
- * Check if there is a bad eraseblock among those we are going to test.
- */
- if (mtd_can_have_bb(mtd)) {
- for (i = eb; i < eb + ebcnt; i++) {
- err = mtd_block_isbad(mtd, (loff_t)i * mtd->erasesize);
-
- if (err < 0) {
- pr_info("block_isbad() returned %d "
- "for EB %d\n", err, i);
- goto out;
- }
-
- if (err) {
- pr_err("EB %d is bad. Skip it.\n", i);
- bad_ebs[i - eb] = 1;
- }
- }
- }
-
- start_timing();
- while (1) {
- int i;
- void *patt;
-
- /* Erase all eraseblocks */
- for (i = eb; i < eb + ebcnt; i++) {
- if (bad_ebs[i - eb])
- continue;
- err = erase_eraseblock(i);
- if (err)
- goto out;
- cond_resched();
- }
-
- /* Check if the eraseblocks contain only 0xFF bytes */
- if (check) {
- for (i = eb; i < eb + ebcnt; i++) {
- if (bad_ebs[i - eb])
- continue;
- err = check_eraseblock(i, patt_FF);
- if (err) {
- pr_info("verify failed"
- " for 0xFF... pattern\n");
- goto out;
- }
- cond_resched();
- }
- }
-
- /* Write the pattern */
- for (i = eb; i < eb + ebcnt; i++) {
- if (bad_ebs[i - eb])
- continue;
- if ((eb + erase_cycles) & 1)
- patt = patt_5A5;
- else
- patt = patt_A5A;
- err = write_pattern(i, patt);
- if (err)
- goto out;
- cond_resched();
- }
-
- /* Verify what we wrote */
- if (check) {
- for (i = eb; i < eb + ebcnt; i++) {
- if (bad_ebs[i - eb])
- continue;
- if ((eb + erase_cycles) & 1)
- patt = patt_5A5;
- else
- patt = patt_A5A;
- err = check_eraseblock(i, patt);
- if (err) {
- pr_info("verify failed for %s"
- " pattern\n",
- ((eb + erase_cycles) & 1) ?
- "0x55AA55..." : "0xAA55AA...");
- goto out;
- }
- cond_resched();
- }
- }
-
- erase_cycles += 1;
-
- if (erase_cycles % gran == 0) {
- long ms;
-
- stop_timing();
- ms = (finish.tv_sec - start.tv_sec) * 1000 +
- (finish.tv_usec - start.tv_usec) / 1000;
- pr_info("%08u erase cycles done, took %lu "
- "milliseconds (%lu seconds)\n",
- erase_cycles, ms, ms / 1000);
- start_timing();
- }
-
- if (!infinite && --cycles_count == 0)
- break;
- }
-out:
-
- pr_info("finished after %u erase cycles\n",
- erase_cycles);
- kfree(bad_ebs);
-out_check_buf:
- kfree(check_buf);
-out_patt_FF:
- kfree(patt_FF);
-out_patt_A5A:
- kfree(patt_A5A);
-out_patt_5A5:
- kfree(patt_5A5);
-out_mtd:
- put_mtd_device(mtd);
- if (err)
- pr_info("error %d occurred during torturing\n", err);
- printk(KERN_INFO "=================================================\n");
- return err;
-}
-module_init(tort_init);
-
-static void __exit tort_exit(void)
-{
- return;
-}
-module_exit(tort_exit);
-
-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++;
-
- pr_info("verify fails on %d pages, %d bytes/%d bits\n",
- pages, bytes, bits);
- pr_info("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");
-
- pr_info("Page %zd 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");
--- /dev/null
+/*
+ * Copyright © 2012 NetCommWireless
+ * Iwo Mergler <Iwo.Mergler@netcommwireless.com.au>
+ *
+ * Test for multi-bit error recovery on a NAND page This mostly tests the
+ * ECC controller / driver.
+ *
+ * There are two test modes:
+ *
+ * 0 - artificially inserting bit errors until the ECC fails
+ * This is the default method and fairly quick. It should
+ * be independent of the quality of the FLASH.
+ *
+ * 1 - re-writing the same pattern repeatedly until the ECC fails.
+ * This method relies on the physics of NAND FLASH to eventually
+ * generate '0' bits if '1' has been written sufficient times.
+ * Depending on the NAND, the first bit errors will appear after
+ * 1000 or more writes and then will usually snowball, reaching the
+ * limits of the ECC quickly.
+ *
+ * The test stops after 10000 cycles, should your FLASH be
+ * exceptionally good and not generate bit errors before that. Try
+ * a different page in that case.
+ *
+ * Please note that neither of these tests will significantly 'use up' any
+ * FLASH endurance. Only a maximum of two erase operations will be performed.
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; see the file COPYING. If not, write to the Free Software
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/mtd/mtd.h>
+#include <linux/err.h>
+#include <linux/mtd/nand.h>
+#include <linux/slab.h>
+
+static int dev;
+module_param(dev, int, S_IRUGO);
+MODULE_PARM_DESC(dev, "MTD device number to use");
+
+static unsigned page_offset;
+module_param(page_offset, uint, S_IRUGO);
+MODULE_PARM_DESC(page_offset, "Page number relative to dev start");
+
+static unsigned seed;
+module_param(seed, uint, S_IRUGO);
+MODULE_PARM_DESC(seed, "Random seed");
+
+static int mode;
+module_param(mode, int, S_IRUGO);
+MODULE_PARM_DESC(mode, "0=incremental errors, 1=overwrite test");
+
+static unsigned max_overwrite = 10000;
+
+static loff_t offset; /* Offset of the page we're using. */
+static unsigned eraseblock; /* Eraseblock number for our page. */
+
+/* We assume that the ECC can correct up to a certain number
+ * of biterrors per subpage. */
+static unsigned subsize; /* Size of subpages */
+static unsigned subcount; /* Number of subpages per page */
+
+static struct mtd_info *mtd; /* MTD device */
+
+static uint8_t *wbuffer; /* One page write / compare buffer */
+static uint8_t *rbuffer; /* One page read buffer */
+
+/* 'random' bytes from known offsets */
+static uint8_t hash(unsigned offset)
+{
+ unsigned v = offset;
+ unsigned char c;
+ v ^= 0x7f7edfd3;
+ v = v ^ (v >> 3);
+ v = v ^ (v >> 5);
+ v = v ^ (v >> 13);
+ c = v & 0xFF;
+ /* Reverse bits of result. */
+ c = (c & 0x0F) << 4 | (c & 0xF0) >> 4;
+ c = (c & 0x33) << 2 | (c & 0xCC) >> 2;
+ c = (c & 0x55) << 1 | (c & 0xAA) >> 1;
+ return c;
+}
+
+static int erase_block(void)
+{
+ int err;
+ struct erase_info ei;
+ loff_t addr = eraseblock * mtd->erasesize;
+
+ pr_info("erase_block\n");
+
+ memset(&ei, 0, sizeof(struct erase_info));
+ ei.mtd = mtd;
+ ei.addr = addr;
+ ei.len = mtd->erasesize;
+
+ err = mtd_erase(mtd, &ei);
+ if (err || ei.state == MTD_ERASE_FAILED) {
+ pr_err("error %d while erasing\n", err);
+ if (!err)
+ err = -EIO;
+ return err;
+ }
+
+ return 0;
+}
+
+/* Writes wbuffer to page */
+static int write_page(int log)
+{
+ int err = 0;
+ size_t written;
+
+ if (log)
+ pr_info("write_page\n");
+
+ err = mtd_write(mtd, offset, mtd->writesize, &written, wbuffer);
+ if (err || written != mtd->writesize) {
+ pr_err("error: write failed at %#llx\n", (long long)offset);
+ if (!err)
+ err = -EIO;
+ }
+
+ return err;
+}
+
+/* Re-writes the data area while leaving the OOB alone. */
+static int rewrite_page(int log)
+{
+ int err = 0;
+ struct mtd_oob_ops ops;
+
+ if (log)
+ pr_info("rewrite page\n");
+
+ ops.mode = MTD_OPS_RAW; /* No ECC */
+ ops.len = mtd->writesize;
+ ops.retlen = 0;
+ ops.ooblen = 0;
+ ops.oobretlen = 0;
+ ops.ooboffs = 0;
+ ops.datbuf = wbuffer;
+ ops.oobbuf = NULL;
+
+ err = mtd_write_oob(mtd, offset, &ops);
+ if (err || ops.retlen != mtd->writesize) {
+ pr_err("error: write_oob failed (%d)\n", err);
+ if (!err)
+ err = -EIO;
+ }
+
+ return err;
+}
+
+/* Reads page into rbuffer. Returns number of corrected bit errors (>=0)
+ * or error (<0) */
+static int read_page(int log)
+{
+ int err = 0;
+ size_t read;
+ struct mtd_ecc_stats oldstats;
+
+ if (log)
+ pr_info("read_page\n");
+
+ /* Saving last mtd stats */
+ memcpy(&oldstats, &mtd->ecc_stats, sizeof(oldstats));
+
+ err = mtd_read(mtd, offset, mtd->writesize, &read, rbuffer);
+ if (err == -EUCLEAN)
+ err = mtd->ecc_stats.corrected - oldstats.corrected;
+
+ if (err < 0 || read != mtd->writesize) {
+ pr_err("error: read failed at %#llx\n", (long long)offset);
+ if (err >= 0)
+ err = -EIO;
+ }
+
+ return err;
+}
+
+/* Verifies rbuffer against random sequence */
+static int verify_page(int log)
+{
+ unsigned i, errs = 0;
+
+ if (log)
+ pr_info("verify_page\n");
+
+ for (i = 0; i < mtd->writesize; i++) {
+ if (rbuffer[i] != hash(i+seed)) {
+ pr_err("Error: page offset %u, expected %02x, got %02x\n",
+ i, hash(i+seed), rbuffer[i]);
+ errs++;
+ }
+ }
+
+ if (errs)
+ return -EIO;
+ else
+ return 0;
+}
+
+#define CBIT(v, n) ((v) & (1 << (n)))
+#define BCLR(v, n) ((v) = (v) & ~(1 << (n)))
+
+/* Finds the first '1' bit in wbuffer starting at offset 'byte'
+ * and sets it to '0'. */
+static int insert_biterror(unsigned byte)
+{
+ int bit;
+
+ while (byte < mtd->writesize) {
+ for (bit = 7; bit >= 0; bit--) {
+ if (CBIT(wbuffer[byte], bit)) {
+ BCLR(wbuffer[byte], bit);
+ pr_info("Inserted biterror @ %u/%u\n", byte, bit);
+ return 0;
+ }
+ }
+ byte++;
+ }
+ pr_err("biterror: Failed to find a '1' bit\n");
+ return -EIO;
+}
+
+/* Writes 'random' data to page and then introduces deliberate bit
+ * errors into the page, while verifying each step. */
+static int incremental_errors_test(void)
+{
+ int err = 0;
+ unsigned i;
+ unsigned errs_per_subpage = 0;
+
+ pr_info("incremental biterrors test\n");
+
+ for (i = 0; i < mtd->writesize; i++)
+ wbuffer[i] = hash(i+seed);
+
+ err = write_page(1);
+ if (err)
+ goto exit;
+
+ while (1) {
+
+ err = rewrite_page(1);
+ if (err)
+ goto exit;
+
+ err = read_page(1);
+ if (err > 0)
+ pr_info("Read reported %d corrected bit errors\n", err);
+ if (err < 0) {
+ pr_err("After %d biterrors per subpage, read reported error %d\n",
+ errs_per_subpage, err);
+ err = 0;
+ goto exit;
+ }
+
+ err = verify_page(1);
+ if (err) {
+ pr_err("ECC failure, read data is incorrect despite read success\n");
+ goto exit;
+ }
+
+ pr_info("Successfully corrected %d bit errors per subpage\n",
+ errs_per_subpage);
+
+ for (i = 0; i < subcount; i++) {
+ err = insert_biterror(i * subsize);
+ if (err < 0)
+ goto exit;
+ }
+ errs_per_subpage++;
+ }
+
+exit:
+ return err;
+}
+
+
+/* Writes 'random' data to page and then re-writes that same data repeatedly.
+ This eventually develops bit errors (bits written as '1' will slowly become
+ '0'), which are corrected as far as the ECC is capable of. */
+static int overwrite_test(void)
+{
+ int err = 0;
+ unsigned i;
+ unsigned max_corrected = 0;
+ unsigned opno = 0;
+ /* We don't expect more than this many correctable bit errors per
+ * page. */
+ #define MAXBITS 512
+ static unsigned bitstats[MAXBITS]; /* bit error histogram. */
+
+ memset(bitstats, 0, sizeof(bitstats));
+
+ pr_info("overwrite biterrors test\n");
+
+ for (i = 0; i < mtd->writesize; i++)
+ wbuffer[i] = hash(i+seed);
+
+ err = write_page(1);
+ if (err)
+ goto exit;
+
+ while (opno < max_overwrite) {
+
+ err = rewrite_page(0);
+ if (err)
+ break;
+
+ err = read_page(0);
+ if (err >= 0) {
+ if (err >= MAXBITS) {
+ pr_info("Implausible number of bit errors corrected\n");
+ err = -EIO;
+ break;
+ }
+ bitstats[err]++;
+ if (err > max_corrected) {
+ max_corrected = err;
+ pr_info("Read reported %d corrected bit errors\n",
+ err);
+ }
+ } else { /* err < 0 */
+ pr_info("Read reported error %d\n", err);
+ err = 0;
+ break;
+ }
+
+ err = verify_page(0);
+ if (err) {
+ bitstats[max_corrected] = opno;
+ pr_info("ECC failure, read data is incorrect despite read success\n");
+ break;
+ }
+
+ opno++;
+ }
+
+ /* At this point bitstats[0] contains the number of ops with no bit
+ * errors, bitstats[1] the number of ops with 1 bit error, etc. */
+ pr_info("Bit error histogram (%d operations total):\n", opno);
+ for (i = 0; i < max_corrected; i++)
+ pr_info("Page reads with %3d corrected bit errors: %d\n",
+ i, bitstats[i]);
+
+exit:
+ return err;
+}
+
+static int __init mtd_nandbiterrs_init(void)
+{
+ int err = 0;
+
+ printk("\n");
+ printk(KERN_INFO "==================================================\n");
+ pr_info("MTD device: %d\n", dev);
+
+ mtd = get_mtd_device(NULL, dev);
+ if (IS_ERR(mtd)) {
+ err = PTR_ERR(mtd);
+ pr_err("error: cannot get MTD device\n");
+ goto exit_mtddev;
+ }
+
+ if (mtd->type != MTD_NANDFLASH) {
+ pr_info("this test requires NAND flash\n");
+ err = -ENODEV;
+ goto exit_nand;
+ }
+
+ pr_info("MTD device size %llu, eraseblock=%u, page=%u, oob=%u\n",
+ (unsigned long long)mtd->size, mtd->erasesize,
+ mtd->writesize, mtd->oobsize);
+
+ subsize = mtd->writesize >> mtd->subpage_sft;
+ subcount = mtd->writesize / subsize;
+
+ pr_info("Device uses %d subpages of %d bytes\n", subcount, subsize);
+
+ offset = page_offset * mtd->writesize;
+ eraseblock = mtd_div_by_eb(offset, mtd);
+
+ pr_info("Using page=%u, offset=%llu, eraseblock=%u\n",
+ page_offset, offset, eraseblock);
+
+ wbuffer = kmalloc(mtd->writesize, GFP_KERNEL);
+ if (!wbuffer) {
+ err = -ENOMEM;
+ goto exit_wbuffer;
+ }
+
+ rbuffer = kmalloc(mtd->writesize, GFP_KERNEL);
+ if (!rbuffer) {
+ err = -ENOMEM;
+ goto exit_rbuffer;
+ }
+
+ err = erase_block();
+ if (err)
+ goto exit_error;
+
+ if (mode == 0)
+ err = incremental_errors_test();
+ else
+ err = overwrite_test();
+
+ if (err)
+ goto exit_error;
+
+ /* We leave the block un-erased in case of test failure. */
+ err = erase_block();
+ if (err)
+ goto exit_error;
+
+ err = -EIO;
+ pr_info("finished successfully.\n");
+ printk(KERN_INFO "==================================================\n");
+
+exit_error:
+ kfree(rbuffer);
+exit_rbuffer:
+ kfree(wbuffer);
+exit_wbuffer:
+ /* Nothing */
+exit_nand:
+ put_mtd_device(mtd);
+exit_mtddev:
+ return err;
+}
+
+static void __exit mtd_nandbiterrs_exit(void)
+{
+ return;
+}
+
+module_init(mtd_nandbiterrs_init);
+module_exit(mtd_nandbiterrs_exit);
+
+MODULE_DESCRIPTION("NAND bit error recovery test");
+MODULE_AUTHOR("Iwo Mergler");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Copyright (C) 2006-2008 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; see the file COPYING. If not, write to the Free Software
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Test OOB read and write on MTD device.
+ *
+ * Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <asm/div64.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/err.h>
+#include <linux/mtd/mtd.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/random.h>
+
+static int dev = -EINVAL;
+module_param(dev, int, S_IRUGO);
+MODULE_PARM_DESC(dev, "MTD device number to use");
+
+static struct mtd_info *mtd;
+static unsigned char *readbuf;
+static unsigned char *writebuf;
+static unsigned char *bbt;
+
+static int ebcnt;
+static int pgcnt;
+static int errcnt;
+static int use_offset;
+static int use_len;
+static int use_len_max;
+static int vary_offset;
+static struct rnd_state rnd_state;
+
+static int erase_eraseblock(int ebnum)
+{
+ int err;
+ struct erase_info ei;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ memset(&ei, 0, sizeof(struct erase_info));
+ ei.mtd = mtd;
+ ei.addr = addr;
+ ei.len = mtd->erasesize;
+
+ err = mtd_erase(mtd, &ei);
+ if (err) {
+ pr_err("error %d while erasing EB %d\n", err, ebnum);
+ return err;
+ }
+
+ if (ei.state == MTD_ERASE_FAILED) {
+ pr_err("some erase error occurred at EB %d\n", ebnum);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int erase_whole_device(void)
+{
+ int err;
+ unsigned int i;
+
+ pr_info("erasing whole device\n");
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = erase_eraseblock(i);
+ if (err)
+ return err;
+ cond_resched();
+ }
+ pr_info("erased %u eraseblocks\n", i);
+ return 0;
+}
+
+static void do_vary_offset(void)
+{
+ use_len -= 1;
+ if (use_len < 1) {
+ use_offset += 1;
+ if (use_offset >= use_len_max)
+ use_offset = 0;
+ use_len = use_len_max - use_offset;
+ }
+}
+
+static int write_eraseblock(int ebnum)
+{
+ int i;
+ struct mtd_oob_ops ops;
+ int err = 0;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) {
+ prandom_bytes_state(&rnd_state, writebuf, use_len);
+ ops.mode = MTD_OPS_AUTO_OOB;
+ ops.len = 0;
+ ops.retlen = 0;
+ ops.ooblen = use_len;
+ ops.oobretlen = 0;
+ ops.ooboffs = use_offset;
+ ops.datbuf = NULL;
+ ops.oobbuf = writebuf;
+ err = mtd_write_oob(mtd, addr, &ops);
+ if (err || ops.oobretlen != use_len) {
+ pr_err("error: writeoob failed at %#llx\n",
+ (long long)addr);
+ pr_err("error: use_len %d, use_offset %d\n",
+ use_len, use_offset);
+ errcnt += 1;
+ return err ? err : -1;
+ }
+ if (vary_offset)
+ do_vary_offset();
+ }
+
+ return err;
+}
+
+static int write_whole_device(void)
+{
+ int err;
+ unsigned int i;
+
+ pr_info("writing OOBs of whole device\n");
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = write_eraseblock(i);
+ if (err)
+ return err;
+ if (i % 256 == 0)
+ pr_info("written up to eraseblock %u\n", i);
+ cond_resched();
+ }
+ pr_info("written %u eraseblocks\n", i);
+ return 0;
+}
+
+static int verify_eraseblock(int ebnum)
+{
+ int i;
+ struct mtd_oob_ops ops;
+ int err = 0;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) {
+ prandom_bytes_state(&rnd_state, writebuf, use_len);
+ ops.mode = MTD_OPS_AUTO_OOB;
+ ops.len = 0;
+ ops.retlen = 0;
+ ops.ooblen = use_len;
+ ops.oobretlen = 0;
+ ops.ooboffs = use_offset;
+ ops.datbuf = NULL;
+ ops.oobbuf = readbuf;
+ err = mtd_read_oob(mtd, addr, &ops);
+ if (err || ops.oobretlen != use_len) {
+ pr_err("error: readoob failed at %#llx\n",
+ (long long)addr);
+ errcnt += 1;
+ return err ? err : -1;
+ }
+ if (memcmp(readbuf, writebuf, use_len)) {
+ pr_err("error: verify failed at %#llx\n",
+ (long long)addr);
+ errcnt += 1;
+ if (errcnt > 1000) {
+ pr_err("error: too many errors\n");
+ return -1;
+ }
+ }
+ if (use_offset != 0 || use_len < mtd->ecclayout->oobavail) {
+ int k;
+
+ ops.mode = MTD_OPS_AUTO_OOB;
+ ops.len = 0;
+ ops.retlen = 0;
+ ops.ooblen = mtd->ecclayout->oobavail;
+ ops.oobretlen = 0;
+ ops.ooboffs = 0;
+ ops.datbuf = NULL;
+ ops.oobbuf = readbuf;
+ err = mtd_read_oob(mtd, addr, &ops);
+ if (err || ops.oobretlen != mtd->ecclayout->oobavail) {
+ pr_err("error: readoob failed at %#llx\n",
+ (long long)addr);
+ errcnt += 1;
+ return err ? err : -1;
+ }
+ if (memcmp(readbuf + use_offset, writebuf, use_len)) {
+ pr_err("error: verify failed at %#llx\n",
+ (long long)addr);
+ errcnt += 1;
+ if (errcnt > 1000) {
+ pr_err("error: too many errors\n");
+ return -1;
+ }
+ }
+ for (k = 0; k < use_offset; ++k)
+ if (readbuf[k] != 0xff) {
+ pr_err("error: verify 0xff "
+ "failed at %#llx\n",
+ (long long)addr);
+ errcnt += 1;
+ if (errcnt > 1000) {
+ pr_err("error: too "
+ "many errors\n");
+ return -1;
+ }
+ }
+ for (k = use_offset + use_len;
+ k < mtd->ecclayout->oobavail; ++k)
+ if (readbuf[k] != 0xff) {
+ pr_err("error: verify 0xff "
+ "failed at %#llx\n",
+ (long long)addr);
+ errcnt += 1;
+ if (errcnt > 1000) {
+ pr_err("error: too "
+ "many errors\n");
+ return -1;
+ }
+ }
+ }
+ if (vary_offset)
+ do_vary_offset();
+ }
+ return err;
+}
+
+static int verify_eraseblock_in_one_go(int ebnum)
+{
+ struct mtd_oob_ops ops;
+ int err = 0;
+ loff_t addr = ebnum * mtd->erasesize;
+ size_t len = mtd->ecclayout->oobavail * pgcnt;
+
+ prandom_bytes_state(&rnd_state, writebuf, len);
+ ops.mode = MTD_OPS_AUTO_OOB;
+ ops.len = 0;
+ ops.retlen = 0;
+ ops.ooblen = len;
+ ops.oobretlen = 0;
+ ops.ooboffs = 0;
+ ops.datbuf = NULL;
+ ops.oobbuf = readbuf;
+ err = mtd_read_oob(mtd, addr, &ops);
+ if (err || ops.oobretlen != len) {
+ pr_err("error: readoob failed at %#llx\n",
+ (long long)addr);
+ errcnt += 1;
+ return err ? err : -1;
+ }
+ if (memcmp(readbuf, writebuf, len)) {
+ pr_err("error: verify failed at %#llx\n",
+ (long long)addr);
+ errcnt += 1;
+ if (errcnt > 1000) {
+ pr_err("error: too many errors\n");
+ return -1;
+ }
+ }
+
+ return err;
+}
+
+static int verify_all_eraseblocks(void)
+{
+ int err;
+ unsigned int i;
+
+ pr_info("verifying all eraseblocks\n");
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = verify_eraseblock(i);
+ if (err)
+ return err;
+ if (i % 256 == 0)
+ pr_info("verified up to eraseblock %u\n", i);
+ cond_resched();
+ }
+ pr_info("verified %u eraseblocks\n", i);
+ return 0;
+}
+
+static int is_block_bad(int ebnum)
+{
+ int ret;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ ret = mtd_block_isbad(mtd, addr);
+ if (ret)
+ pr_info("block %d is bad\n", ebnum);
+ return ret;
+}
+
+static int scan_for_bad_eraseblocks(void)
+{
+ int i, bad = 0;
+
+ bbt = kmalloc(ebcnt, GFP_KERNEL);
+ if (!bbt)
+ return -ENOMEM;
+
+ pr_info("scanning for bad eraseblocks\n");
+ for (i = 0; i < ebcnt; ++i) {
+ bbt[i] = is_block_bad(i) ? 1 : 0;
+ if (bbt[i])
+ bad += 1;
+ cond_resched();
+ }
+ pr_info("scanned %d eraseblocks, %d are bad\n", i, bad);
+ return 0;
+}
+
+static int __init mtd_oobtest_init(void)
+{
+ int err = 0;
+ unsigned int i;
+ uint64_t tmp;
+ struct mtd_oob_ops ops;
+ loff_t addr = 0, addr0;
+
+ printk(KERN_INFO "\n");
+ printk(KERN_INFO "=================================================\n");
+
+ if (dev < 0) {
+ pr_info("Please specify a valid mtd-device via module parameter\n");
+ pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
+ return -EINVAL;
+ }
+
+ pr_info("MTD device: %d\n", dev);
+
+ mtd = get_mtd_device(NULL, dev);
+ if (IS_ERR(mtd)) {
+ err = PTR_ERR(mtd);
+ pr_err("error: cannot get MTD device\n");
+ return err;
+ }
+
+ if (mtd->type != MTD_NANDFLASH) {
+ pr_info("this test requires NAND flash\n");
+ goto out;
+ }
+
+ tmp = mtd->size;
+ do_div(tmp, mtd->erasesize);
+ ebcnt = tmp;
+ pgcnt = mtd->erasesize / mtd->writesize;
+
+ pr_info("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,
+ mtd->writesize, ebcnt, pgcnt, mtd->oobsize);
+
+ err = -ENOMEM;
+ readbuf = kmalloc(mtd->erasesize, GFP_KERNEL);
+ if (!readbuf)
+ goto out;
+ writebuf = kmalloc(mtd->erasesize, GFP_KERNEL);
+ if (!writebuf)
+ goto out;
+
+ err = scan_for_bad_eraseblocks();
+ if (err)
+ goto out;
+
+ use_offset = 0;
+ use_len = mtd->ecclayout->oobavail;
+ use_len_max = mtd->ecclayout->oobavail;
+ vary_offset = 0;
+
+ /* First test: write all OOB, read it back and verify */
+ pr_info("test 1 of 5\n");
+
+ err = erase_whole_device();
+ if (err)
+ goto out;
+
+ prandom_seed_state(&rnd_state, 1);
+ err = write_whole_device();
+ if (err)
+ goto out;
+
+ prandom_seed_state(&rnd_state, 1);
+ err = verify_all_eraseblocks();
+ if (err)
+ goto out;
+
+ /*
+ * Second test: write all OOB, a block at a time, read it back and
+ * verify.
+ */
+ pr_info("test 2 of 5\n");
+
+ err = erase_whole_device();
+ if (err)
+ goto out;
+
+ prandom_seed_state(&rnd_state, 3);
+ err = write_whole_device();
+ if (err)
+ goto out;
+
+ /* Check all eraseblocks */
+ prandom_seed_state(&rnd_state, 3);
+ pr_info("verifying all eraseblocks\n");
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = verify_eraseblock_in_one_go(i);
+ if (err)
+ goto out;
+ if (i % 256 == 0)
+ pr_info("verified up to eraseblock %u\n", i);
+ cond_resched();
+ }
+ pr_info("verified %u eraseblocks\n", i);
+
+ /*
+ * Third test: write OOB at varying offsets and lengths, read it back
+ * and verify.
+ */
+ pr_info("test 3 of 5\n");
+
+ err = erase_whole_device();
+ if (err)
+ goto out;
+
+ /* Write all eraseblocks */
+ use_offset = 0;
+ use_len = mtd->ecclayout->oobavail;
+ use_len_max = mtd->ecclayout->oobavail;
+ vary_offset = 1;
+ prandom_seed_state(&rnd_state, 5);
+
+ err = write_whole_device();
+ if (err)
+ goto out;
+
+ /* Check all eraseblocks */
+ use_offset = 0;
+ use_len = mtd->ecclayout->oobavail;
+ use_len_max = mtd->ecclayout->oobavail;
+ vary_offset = 1;
+ prandom_seed_state(&rnd_state, 5);
+ err = verify_all_eraseblocks();
+ if (err)
+ goto out;
+
+ use_offset = 0;
+ use_len = mtd->ecclayout->oobavail;
+ use_len_max = mtd->ecclayout->oobavail;
+ vary_offset = 0;
+
+ /* Fourth test: try to write off end of device */
+ pr_info("test 4 of 5\n");
+
+ err = erase_whole_device();
+ if (err)
+ goto out;
+
+ addr0 = 0;
+ for (i = 0; i < ebcnt && bbt[i]; ++i)
+ addr0 += mtd->erasesize;
+
+ /* Attempt to write off end of OOB */
+ ops.mode = MTD_OPS_AUTO_OOB;
+ ops.len = 0;
+ ops.retlen = 0;
+ ops.ooblen = 1;
+ ops.oobretlen = 0;
+ ops.ooboffs = mtd->ecclayout->oobavail;
+ ops.datbuf = NULL;
+ ops.oobbuf = writebuf;
+ pr_info("attempting to start write past end of OOB\n");
+ pr_info("an error is expected...\n");
+ err = mtd_write_oob(mtd, addr0, &ops);
+ if (err) {
+ pr_info("error occurred as expected\n");
+ err = 0;
+ } else {
+ pr_err("error: can write past end of OOB\n");
+ errcnt += 1;
+ }
+
+ /* Attempt to read off end of OOB */
+ ops.mode = MTD_OPS_AUTO_OOB;
+ ops.len = 0;
+ ops.retlen = 0;
+ ops.ooblen = 1;
+ ops.oobretlen = 0;
+ ops.ooboffs = mtd->ecclayout->oobavail;
+ ops.datbuf = NULL;
+ ops.oobbuf = readbuf;
+ pr_info("attempting to start read past end of OOB\n");
+ pr_info("an error is expected...\n");
+ err = mtd_read_oob(mtd, addr0, &ops);
+ if (err) {
+ pr_info("error occurred as expected\n");
+ err = 0;
+ } else {
+ pr_err("error: can read past end of OOB\n");
+ errcnt += 1;
+ }
+
+ if (bbt[ebcnt - 1])
+ pr_info("skipping end of device tests because last "
+ "block is bad\n");
+ else {
+ /* Attempt to write off end of device */
+ ops.mode = MTD_OPS_AUTO_OOB;
+ ops.len = 0;
+ ops.retlen = 0;
+ ops.ooblen = mtd->ecclayout->oobavail + 1;
+ ops.oobretlen = 0;
+ ops.ooboffs = 0;
+ ops.datbuf = NULL;
+ ops.oobbuf = writebuf;
+ pr_info("attempting to write past end of device\n");
+ pr_info("an error is expected...\n");
+ err = mtd_write_oob(mtd, mtd->size - mtd->writesize, &ops);
+ if (err) {
+ pr_info("error occurred as expected\n");
+ err = 0;
+ } else {
+ pr_err("error: wrote past end of device\n");
+ errcnt += 1;
+ }
+
+ /* Attempt to read off end of device */
+ ops.mode = MTD_OPS_AUTO_OOB;
+ ops.len = 0;
+ ops.retlen = 0;
+ ops.ooblen = mtd->ecclayout->oobavail + 1;
+ ops.oobretlen = 0;
+ ops.ooboffs = 0;
+ ops.datbuf = NULL;
+ ops.oobbuf = readbuf;
+ pr_info("attempting to read past end of device\n");
+ pr_info("an error is expected...\n");
+ err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops);
+ if (err) {
+ pr_info("error occurred as expected\n");
+ err = 0;
+ } else {
+ pr_err("error: read past end of device\n");
+ errcnt += 1;
+ }
+
+ err = erase_eraseblock(ebcnt - 1);
+ if (err)
+ goto out;
+
+ /* Attempt to write off end of device */
+ ops.mode = MTD_OPS_AUTO_OOB;
+ ops.len = 0;
+ ops.retlen = 0;
+ ops.ooblen = mtd->ecclayout->oobavail;
+ ops.oobretlen = 0;
+ ops.ooboffs = 1;
+ ops.datbuf = NULL;
+ ops.oobbuf = writebuf;
+ pr_info("attempting to write past end of device\n");
+ pr_info("an error is expected...\n");
+ err = mtd_write_oob(mtd, mtd->size - mtd->writesize, &ops);
+ if (err) {
+ pr_info("error occurred as expected\n");
+ err = 0;
+ } else {
+ pr_err("error: wrote past end of device\n");
+ errcnt += 1;
+ }
+
+ /* Attempt to read off end of device */
+ ops.mode = MTD_OPS_AUTO_OOB;
+ ops.len = 0;
+ ops.retlen = 0;
+ ops.ooblen = mtd->ecclayout->oobavail;
+ ops.oobretlen = 0;
+ ops.ooboffs = 1;
+ ops.datbuf = NULL;
+ ops.oobbuf = readbuf;
+ pr_info("attempting to read past end of device\n");
+ pr_info("an error is expected...\n");
+ err = mtd_read_oob(mtd, mtd->size - mtd->writesize, &ops);
+ if (err) {
+ pr_info("error occurred as expected\n");
+ err = 0;
+ } else {
+ pr_err("error: read past end of device\n");
+ errcnt += 1;
+ }
+ }
+
+ /* Fifth test: write / read across block boundaries */
+ pr_info("test 5 of 5\n");
+
+ /* Erase all eraseblocks */
+ err = erase_whole_device();
+ if (err)
+ goto out;
+
+ /* Write all eraseblocks */
+ prandom_seed_state(&rnd_state, 11);
+ pr_info("writing OOBs of whole device\n");
+ for (i = 0; i < ebcnt - 1; ++i) {
+ int cnt = 2;
+ int pg;
+ size_t sz = mtd->ecclayout->oobavail;
+ if (bbt[i] || bbt[i + 1])
+ continue;
+ addr = (i + 1) * mtd->erasesize - mtd->writesize;
+ for (pg = 0; pg < cnt; ++pg) {
+ prandom_bytes_state(&rnd_state, writebuf, sz);
+ ops.mode = MTD_OPS_AUTO_OOB;
+ ops.len = 0;
+ ops.retlen = 0;
+ ops.ooblen = sz;
+ ops.oobretlen = 0;
+ ops.ooboffs = 0;
+ ops.datbuf = NULL;
+ ops.oobbuf = writebuf;
+ err = mtd_write_oob(mtd, addr, &ops);
+ if (err)
+ goto out;
+ if (i % 256 == 0)
+ pr_info("written up to eraseblock %u\n", i);
+ cond_resched();
+ addr += mtd->writesize;
+ }
+ }
+ pr_info("written %u eraseblocks\n", i);
+
+ /* Check all eraseblocks */
+ prandom_seed_state(&rnd_state, 11);
+ pr_info("verifying all eraseblocks\n");
+ for (i = 0; i < ebcnt - 1; ++i) {
+ if (bbt[i] || bbt[i + 1])
+ continue;
+ prandom_bytes_state(&rnd_state, writebuf,
+ mtd->ecclayout->oobavail * 2);
+ addr = (i + 1) * mtd->erasesize - mtd->writesize;
+ ops.mode = MTD_OPS_AUTO_OOB;
+ ops.len = 0;
+ ops.retlen = 0;
+ ops.ooblen = mtd->ecclayout->oobavail * 2;
+ ops.oobretlen = 0;
+ ops.ooboffs = 0;
+ ops.datbuf = NULL;
+ ops.oobbuf = readbuf;
+ err = mtd_read_oob(mtd, addr, &ops);
+ if (err)
+ goto out;
+ if (memcmp(readbuf, writebuf, mtd->ecclayout->oobavail * 2)) {
+ pr_err("error: verify failed at %#llx\n",
+ (long long)addr);
+ errcnt += 1;
+ if (errcnt > 1000) {
+ pr_err("error: too many errors\n");
+ goto out;
+ }
+ }
+ if (i % 256 == 0)
+ pr_info("verified up to eraseblock %u\n", i);
+ cond_resched();
+ }
+ pr_info("verified %u eraseblocks\n", i);
+
+ pr_info("finished with %d errors\n", errcnt);
+out:
+ kfree(bbt);
+ kfree(writebuf);
+ kfree(readbuf);
+ put_mtd_device(mtd);
+ if (err)
+ pr_info("error %d occurred\n", err);
+ printk(KERN_INFO "=================================================\n");
+ return err;
+}
+module_init(mtd_oobtest_init);
+
+static void __exit mtd_oobtest_exit(void)
+{
+ return;
+}
+module_exit(mtd_oobtest_exit);
+
+MODULE_DESCRIPTION("Out-of-band test module");
+MODULE_AUTHOR("Adrian Hunter");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Copyright (C) 2006-2008 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; see the file COPYING. If not, write to the Free Software
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Test page read and write on MTD device.
+ *
+ * Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <asm/div64.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/err.h>
+#include <linux/mtd/mtd.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/random.h>
+
+static int dev = -EINVAL;
+module_param(dev, int, S_IRUGO);
+MODULE_PARM_DESC(dev, "MTD device number to use");
+
+static struct mtd_info *mtd;
+static unsigned char *twopages;
+static unsigned char *writebuf;
+static unsigned char *boundary;
+static unsigned char *bbt;
+
+static int pgsize;
+static int bufsize;
+static int ebcnt;
+static int pgcnt;
+static int errcnt;
+static struct rnd_state rnd_state;
+
+static int erase_eraseblock(int ebnum)
+{
+ int err;
+ struct erase_info ei;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ memset(&ei, 0, sizeof(struct erase_info));
+ ei.mtd = mtd;
+ ei.addr = addr;
+ ei.len = mtd->erasesize;
+
+ err = mtd_erase(mtd, &ei);
+ if (err) {
+ pr_err("error %d while erasing EB %d\n", err, ebnum);
+ return err;
+ }
+
+ if (ei.state == MTD_ERASE_FAILED) {
+ pr_err("some erase error occurred at EB %d\n",
+ ebnum);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int write_eraseblock(int ebnum)
+{
+ int err = 0;
+ size_t written;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ prandom_bytes_state(&rnd_state, writebuf, mtd->erasesize);
+ cond_resched();
+ err = mtd_write(mtd, addr, mtd->erasesize, &written, writebuf);
+ if (err || written != mtd->erasesize)
+ pr_err("error: write failed at %#llx\n",
+ (long long)addr);
+
+ return err;
+}
+
+static int verify_eraseblock(int ebnum)
+{
+ uint32_t j;
+ size_t read;
+ int err = 0, i;
+ loff_t addr0, addrn;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ addr0 = 0;
+ for (i = 0; i < ebcnt && bbt[i]; ++i)
+ addr0 += mtd->erasesize;
+
+ addrn = mtd->size;
+ for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++i)
+ addrn -= mtd->erasesize;
+
+ prandom_bytes_state(&rnd_state, writebuf, mtd->erasesize);
+ for (j = 0; j < pgcnt - 1; ++j, addr += pgsize) {
+ /* Do a read to set the internal dataRAMs to different data */
+ err = mtd_read(mtd, addr0, bufsize, &read, twopages);
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != bufsize) {
+ pr_err("error: read failed at %#llx\n",
+ (long long)addr0);
+ return err;
+ }
+ err = mtd_read(mtd, addrn - bufsize, bufsize, &read, twopages);
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != bufsize) {
+ pr_err("error: read failed at %#llx\n",
+ (long long)(addrn - bufsize));
+ return err;
+ }
+ memset(twopages, 0, bufsize);
+ err = mtd_read(mtd, addr, bufsize, &read, twopages);
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != bufsize) {
+ pr_err("error: read failed at %#llx\n",
+ (long long)addr);
+ break;
+ }
+ if (memcmp(twopages, writebuf + (j * pgsize), bufsize)) {
+ pr_err("error: verify failed at %#llx\n",
+ (long long)addr);
+ errcnt += 1;
+ }
+ }
+ /* Check boundary between eraseblocks */
+ if (addr <= addrn - pgsize - pgsize && !bbt[ebnum + 1]) {
+ struct rnd_state old_state = rnd_state;
+
+ /* Do a read to set the internal dataRAMs to different data */
+ err = mtd_read(mtd, addr0, bufsize, &read, twopages);
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != bufsize) {
+ pr_err("error: read failed at %#llx\n",
+ (long long)addr0);
+ return err;
+ }
+ err = mtd_read(mtd, addrn - bufsize, bufsize, &read, twopages);
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != bufsize) {
+ pr_err("error: read failed at %#llx\n",
+ (long long)(addrn - bufsize));
+ return err;
+ }
+ memset(twopages, 0, bufsize);
+ err = mtd_read(mtd, addr, bufsize, &read, twopages);
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != bufsize) {
+ pr_err("error: read failed at %#llx\n",
+ (long long)addr);
+ return err;
+ }
+ memcpy(boundary, writebuf + mtd->erasesize - pgsize, pgsize);
+ prandom_bytes_state(&rnd_state, boundary + pgsize, pgsize);
+ if (memcmp(twopages, boundary, bufsize)) {
+ pr_err("error: verify failed at %#llx\n",
+ (long long)addr);
+ errcnt += 1;
+ }
+ rnd_state = old_state;
+ }
+ return err;
+}
+
+static int crosstest(void)
+{
+ size_t read;
+ int err = 0, i;
+ loff_t addr, addr0, addrn;
+ unsigned char *pp1, *pp2, *pp3, *pp4;
+
+ pr_info("crosstest\n");
+ pp1 = kmalloc(pgsize * 4, GFP_KERNEL);
+ if (!pp1)
+ return -ENOMEM;
+ pp2 = pp1 + pgsize;
+ pp3 = pp2 + pgsize;
+ pp4 = pp3 + pgsize;
+ memset(pp1, 0, pgsize * 4);
+
+ addr0 = 0;
+ for (i = 0; i < ebcnt && bbt[i]; ++i)
+ addr0 += mtd->erasesize;
+
+ addrn = mtd->size;
+ for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++i)
+ addrn -= mtd->erasesize;
+
+ /* Read 2nd-to-last page to pp1 */
+ addr = addrn - pgsize - pgsize;
+ err = mtd_read(mtd, addr, pgsize, &read, pp1);
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != pgsize) {
+ pr_err("error: read failed at %#llx\n",
+ (long long)addr);
+ kfree(pp1);
+ return err;
+ }
+
+ /* Read 3rd-to-last page to pp1 */
+ addr = addrn - pgsize - pgsize - pgsize;
+ err = mtd_read(mtd, addr, pgsize, &read, pp1);
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != pgsize) {
+ pr_err("error: read failed at %#llx\n",
+ (long long)addr);
+ kfree(pp1);
+ return err;
+ }
+
+ /* Read first page to pp2 */
+ addr = addr0;
+ pr_info("reading page at %#llx\n", (long long)addr);
+ err = mtd_read(mtd, addr, pgsize, &read, pp2);
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != pgsize) {
+ pr_err("error: read failed at %#llx\n",
+ (long long)addr);
+ kfree(pp1);
+ return err;
+ }
+
+ /* Read last page to pp3 */
+ addr = addrn - pgsize;
+ pr_info("reading page at %#llx\n", (long long)addr);
+ err = mtd_read(mtd, addr, pgsize, &read, pp3);
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != pgsize) {
+ pr_err("error: read failed at %#llx\n",
+ (long long)addr);
+ kfree(pp1);
+ return err;
+ }
+
+ /* Read first page again to pp4 */
+ addr = addr0;
+ pr_info("reading page at %#llx\n", (long long)addr);
+ err = mtd_read(mtd, addr, pgsize, &read, pp4);
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != pgsize) {
+ pr_err("error: read failed at %#llx\n",
+ (long long)addr);
+ kfree(pp1);
+ return err;
+ }
+
+ /* pp2 and pp4 should be the same */
+ pr_info("verifying pages read at %#llx match\n",
+ (long long)addr0);
+ if (memcmp(pp2, pp4, pgsize)) {
+ pr_err("verify failed!\n");
+ errcnt += 1;
+ } else if (!err)
+ pr_info("crosstest ok\n");
+ kfree(pp1);
+ return err;
+}
+
+static int erasecrosstest(void)
+{
+ size_t read, written;
+ int err = 0, i, ebnum, ebnum2;
+ loff_t addr0;
+ char *readbuf = twopages;
+
+ pr_info("erasecrosstest\n");
+
+ ebnum = 0;
+ addr0 = 0;
+ for (i = 0; i < ebcnt && bbt[i]; ++i) {
+ addr0 += mtd->erasesize;
+ ebnum += 1;
+ }
+
+ ebnum2 = ebcnt - 1;
+ while (ebnum2 && bbt[ebnum2])
+ ebnum2 -= 1;
+
+ pr_info("erasing block %d\n", ebnum);
+ err = erase_eraseblock(ebnum);
+ if (err)
+ return err;
+
+ pr_info("writing 1st page of block %d\n", ebnum);
+ prandom_bytes_state(&rnd_state, writebuf, pgsize);
+ strcpy(writebuf, "There is no data like this!");
+ err = mtd_write(mtd, addr0, pgsize, &written, writebuf);
+ if (err || written != pgsize) {
+ pr_info("error: write failed at %#llx\n",
+ (long long)addr0);
+ return err ? err : -1;
+ }
+
+ pr_info("reading 1st page of block %d\n", ebnum);
+ memset(readbuf, 0, pgsize);
+ err = mtd_read(mtd, addr0, pgsize, &read, readbuf);
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != pgsize) {
+ pr_err("error: read failed at %#llx\n",
+ (long long)addr0);
+ return err ? err : -1;
+ }
+
+ pr_info("verifying 1st page of block %d\n", ebnum);
+ if (memcmp(writebuf, readbuf, pgsize)) {
+ pr_err("verify failed!\n");
+ errcnt += 1;
+ return -1;
+ }
+
+ pr_info("erasing block %d\n", ebnum);
+ err = erase_eraseblock(ebnum);
+ if (err)
+ return err;
+
+ pr_info("writing 1st page of block %d\n", ebnum);
+ prandom_bytes_state(&rnd_state, writebuf, pgsize);
+ strcpy(writebuf, "There is no data like this!");
+ err = mtd_write(mtd, addr0, pgsize, &written, writebuf);
+ if (err || written != pgsize) {
+ pr_err("error: write failed at %#llx\n",
+ (long long)addr0);
+ return err ? err : -1;
+ }
+
+ pr_info("erasing block %d\n", ebnum2);
+ err = erase_eraseblock(ebnum2);
+ if (err)
+ return err;
+
+ pr_info("reading 1st page of block %d\n", ebnum);
+ memset(readbuf, 0, pgsize);
+ err = mtd_read(mtd, addr0, pgsize, &read, readbuf);
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != pgsize) {
+ pr_err("error: read failed at %#llx\n",
+ (long long)addr0);
+ return err ? err : -1;
+ }
+
+ pr_info("verifying 1st page of block %d\n", ebnum);
+ if (memcmp(writebuf, readbuf, pgsize)) {
+ pr_err("verify failed!\n");
+ errcnt += 1;
+ return -1;
+ }
+
+ if (!err)
+ pr_info("erasecrosstest ok\n");
+ return err;
+}
+
+static int erasetest(void)
+{
+ size_t read, written;
+ int err = 0, i, ebnum, ok = 1;
+ loff_t addr0;
+
+ pr_info("erasetest\n");
+
+ ebnum = 0;
+ addr0 = 0;
+ for (i = 0; i < ebcnt && bbt[i]; ++i) {
+ addr0 += mtd->erasesize;
+ ebnum += 1;
+ }
+
+ pr_info("erasing block %d\n", ebnum);
+ err = erase_eraseblock(ebnum);
+ if (err)
+ return err;
+
+ pr_info("writing 1st page of block %d\n", ebnum);
+ prandom_bytes_state(&rnd_state, writebuf, pgsize);
+ err = mtd_write(mtd, addr0, pgsize, &written, writebuf);
+ if (err || written != pgsize) {
+ pr_err("error: write failed at %#llx\n",
+ (long long)addr0);
+ return err ? err : -1;
+ }
+
+ pr_info("erasing block %d\n", ebnum);
+ err = erase_eraseblock(ebnum);
+ if (err)
+ return err;
+
+ pr_info("reading 1st page of block %d\n", ebnum);
+ err = mtd_read(mtd, addr0, pgsize, &read, twopages);
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != pgsize) {
+ pr_err("error: read failed at %#llx\n",
+ (long long)addr0);
+ return err ? err : -1;
+ }
+
+ pr_info("verifying 1st page of block %d is all 0xff\n",
+ ebnum);
+ for (i = 0; i < pgsize; ++i)
+ if (twopages[i] != 0xff) {
+ pr_err("verifying all 0xff failed at %d\n",
+ i);
+ errcnt += 1;
+ ok = 0;
+ break;
+ }
+
+ if (ok && !err)
+ pr_info("erasetest ok\n");
+
+ return err;
+}
+
+static int is_block_bad(int ebnum)
+{
+ loff_t addr = ebnum * mtd->erasesize;
+ int ret;
+
+ ret = mtd_block_isbad(mtd, addr);
+ if (ret)
+ pr_info("block %d is bad\n", ebnum);
+ return ret;
+}
+
+static int scan_for_bad_eraseblocks(void)
+{
+ int i, bad = 0;
+
+ bbt = kzalloc(ebcnt, GFP_KERNEL);
+ if (!bbt)
+ return -ENOMEM;
+
+ pr_info("scanning for bad eraseblocks\n");
+ for (i = 0; i < ebcnt; ++i) {
+ bbt[i] = is_block_bad(i) ? 1 : 0;
+ if (bbt[i])
+ bad += 1;
+ cond_resched();
+ }
+ pr_info("scanned %d eraseblocks, %d are bad\n", i, bad);
+ return 0;
+}
+
+static int __init mtd_pagetest_init(void)
+{
+ int err = 0;
+ uint64_t tmp;
+ uint32_t i;
+
+ printk(KERN_INFO "\n");
+ printk(KERN_INFO "=================================================\n");
+
+ if (dev < 0) {
+ pr_info("Please specify a valid mtd-device via module parameter\n");
+ pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
+ return -EINVAL;
+ }
+
+ pr_info("MTD device: %d\n", dev);
+
+ mtd = get_mtd_device(NULL, dev);
+ if (IS_ERR(mtd)) {
+ err = PTR_ERR(mtd);
+ pr_err("error: cannot get MTD device\n");
+ return err;
+ }
+
+ if (mtd->type != MTD_NANDFLASH) {
+ pr_info("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;
+
+ pr_info("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)
+ goto out;
+ twopages = kmalloc(bufsize, GFP_KERNEL);
+ if (!twopages)
+ goto out;
+ boundary = kmalloc(bufsize, GFP_KERNEL);
+ if (!boundary)
+ goto out;
+
+ err = scan_for_bad_eraseblocks();
+ if (err)
+ goto out;
+
+ /* Erase all eraseblocks */
+ pr_info("erasing whole device\n");
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = erase_eraseblock(i);
+ if (err)
+ goto out;
+ cond_resched();
+ }
+ pr_info("erased %u eraseblocks\n", i);
+
+ /* Write all eraseblocks */
+ prandom_seed_state(&rnd_state, 1);
+ pr_info("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)
+ pr_info("written up to eraseblock %u\n", i);
+ cond_resched();
+ }
+ pr_info("written %u eraseblocks\n", i);
+
+ /* Check all eraseblocks */
+ prandom_seed_state(&rnd_state, 1);
+ pr_info("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)
+ pr_info("verified up to eraseblock %u\n", i);
+ cond_resched();
+ }
+ pr_info("verified %u eraseblocks\n", i);
+
+ err = crosstest();
+ if (err)
+ goto out;
+
+ err = erasecrosstest();
+ if (err)
+ goto out;
+
+ err = erasetest();
+ if (err)
+ goto out;
+
+ pr_info("finished with %d errors\n", errcnt);
+out:
+
+ kfree(bbt);
+ kfree(boundary);
+ kfree(twopages);
+ kfree(writebuf);
+ put_mtd_device(mtd);
+ if (err)
+ pr_info("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");
--- /dev/null
+/*
+ * Copyright (C) 2006-2008 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; see the file COPYING. If not, write to the Free Software
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Check MTD device read.
+ *
+ * Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/err.h>
+#include <linux/mtd/mtd.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+
+static int dev = -EINVAL;
+module_param(dev, int, S_IRUGO);
+MODULE_PARM_DESC(dev, "MTD device number to use");
+
+static struct mtd_info *mtd;
+static unsigned char *iobuf;
+static unsigned char *iobuf1;
+static unsigned char *bbt;
+
+static int pgsize;
+static int ebcnt;
+static int pgcnt;
+
+static int read_eraseblock_by_page(int ebnum)
+{
+ size_t read;
+ int i, ret, err = 0;
+ loff_t addr = ebnum * mtd->erasesize;
+ void *buf = iobuf;
+ void *oobbuf = iobuf1;
+
+ for (i = 0; i < pgcnt; i++) {
+ memset(buf, 0 , pgsize);
+ ret = mtd_read(mtd, addr, pgsize, &read, buf);
+ if (ret == -EUCLEAN)
+ ret = 0;
+ if (ret || read != pgsize) {
+ pr_err("error: read failed at %#llx\n",
+ (long long)addr);
+ if (!err)
+ err = ret;
+ if (!err)
+ err = -EINVAL;
+ }
+ if (mtd->oobsize) {
+ struct mtd_oob_ops ops;
+
+ ops.mode = MTD_OPS_PLACE_OOB;
+ ops.len = 0;
+ ops.retlen = 0;
+ ops.ooblen = mtd->oobsize;
+ ops.oobretlen = 0;
+ ops.ooboffs = 0;
+ ops.datbuf = NULL;
+ ops.oobbuf = oobbuf;
+ ret = mtd_read_oob(mtd, addr, &ops);
+ if ((ret && !mtd_is_bitflip(ret)) ||
+ ops.oobretlen != mtd->oobsize) {
+ pr_err("error: read oob failed at "
+ "%#llx\n", (long long)addr);
+ if (!err)
+ err = ret;
+ if (!err)
+ err = -EINVAL;
+ }
+ oobbuf += mtd->oobsize;
+ }
+ addr += pgsize;
+ buf += pgsize;
+ }
+
+ return err;
+}
+
+static void dump_eraseblock(int ebnum)
+{
+ int i, j, n;
+ char line[128];
+ int pg, oob;
+
+ pr_info("dumping eraseblock %d\n", ebnum);
+ n = mtd->erasesize;
+ for (i = 0; i < n;) {
+ char *p = line;
+
+ p += sprintf(p, "%05x: ", i);
+ for (j = 0; j < 32 && i < n; j++, i++)
+ p += sprintf(p, "%02x", (unsigned int)iobuf[i]);
+ printk(KERN_CRIT "%s\n", line);
+ cond_resched();
+ }
+ if (!mtd->oobsize)
+ return;
+ pr_info("dumping oob from eraseblock %d\n", ebnum);
+ n = mtd->oobsize;
+ for (pg = 0, i = 0; pg < pgcnt; pg++)
+ for (oob = 0; oob < n;) {
+ char *p = line;
+
+ p += sprintf(p, "%05x: ", i);
+ for (j = 0; j < 32 && oob < n; j++, oob++, i++)
+ p += sprintf(p, "%02x",
+ (unsigned int)iobuf1[i]);
+ printk(KERN_CRIT "%s\n", line);
+ cond_resched();
+ }
+}
+
+static int is_block_bad(int ebnum)
+{
+ loff_t addr = ebnum * mtd->erasesize;
+ int ret;
+
+ ret = mtd_block_isbad(mtd, addr);
+ if (ret)
+ pr_info("block %d is bad\n", ebnum);
+ return ret;
+}
+
+static int scan_for_bad_eraseblocks(void)
+{
+ int i, bad = 0;
+
+ bbt = kzalloc(ebcnt, GFP_KERNEL);
+ if (!bbt)
+ return -ENOMEM;
+
+ if (!mtd_can_have_bb(mtd))
+ return 0;
+
+ pr_info("scanning for bad eraseblocks\n");
+ for (i = 0; i < ebcnt; ++i) {
+ bbt[i] = is_block_bad(i) ? 1 : 0;
+ if (bbt[i])
+ bad += 1;
+ cond_resched();
+ }
+ pr_info("scanned %d eraseblocks, %d are bad\n", i, bad);
+ return 0;
+}
+
+static int __init mtd_readtest_init(void)
+{
+ uint64_t tmp;
+ int err, i;
+
+ printk(KERN_INFO "\n");
+ printk(KERN_INFO "=================================================\n");
+
+ if (dev < 0) {
+ pr_info("Please specify a valid mtd-device via module parameter\n");
+ return -EINVAL;
+ }
+
+ pr_info("MTD device: %d\n", dev);
+
+ mtd = get_mtd_device(NULL, dev);
+ if (IS_ERR(mtd)) {
+ err = PTR_ERR(mtd);
+ pr_err("error: Cannot get MTD device\n");
+ return err;
+ }
+
+ if (mtd->writesize == 1) {
+ pr_info("not NAND flash, assume page size is 512 "
+ "bytes.\n");
+ pgsize = 512;
+ } else
+ pgsize = mtd->writesize;
+
+ tmp = mtd->size;
+ do_div(tmp, mtd->erasesize);
+ ebcnt = tmp;
+ pgcnt = mtd->erasesize / pgsize;
+
+ pr_info("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;
+ iobuf = kmalloc(mtd->erasesize, GFP_KERNEL);
+ if (!iobuf)
+ goto out;
+ iobuf1 = kmalloc(mtd->erasesize, GFP_KERNEL);
+ if (!iobuf1)
+ goto out;
+
+ err = scan_for_bad_eraseblocks();
+ if (err)
+ goto out;
+
+ /* Read all eraseblocks 1 page at a time */
+ pr_info("testing page read\n");
+ for (i = 0; i < ebcnt; ++i) {
+ int ret;
+
+ if (bbt[i])
+ continue;
+ ret = read_eraseblock_by_page(i);
+ if (ret) {
+ dump_eraseblock(i);
+ if (!err)
+ err = ret;
+ }
+ cond_resched();
+ }
+
+ if (err)
+ pr_info("finished with errors\n");
+ else
+ pr_info("finished\n");
+
+out:
+
+ kfree(iobuf);
+ kfree(iobuf1);
+ kfree(bbt);
+ put_mtd_device(mtd);
+ if (err)
+ pr_info("error %d occurred\n", err);
+ printk(KERN_INFO "=================================================\n");
+ return err;
+}
+module_init(mtd_readtest_init);
+
+static void __exit mtd_readtest_exit(void)
+{
+ return;
+}
+module_exit(mtd_readtest_exit);
+
+MODULE_DESCRIPTION("Read test module");
+MODULE_AUTHOR("Adrian Hunter");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Copyright (C) 2007 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; see the file COPYING. If not, write to the Free Software
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Test read and write speed of a MTD device.
+ *
+ * Author: Adrian Hunter <adrian.hunter@nokia.com>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/err.h>
+#include <linux/mtd/mtd.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/random.h>
+
+static int dev = -EINVAL;
+module_param(dev, int, S_IRUGO);
+MODULE_PARM_DESC(dev, "MTD device number to use");
+
+static int count;
+module_param(count, int, S_IRUGO);
+MODULE_PARM_DESC(count, "Maximum number of eraseblocks to use "
+ "(0 means use all)");
+
+static struct mtd_info *mtd;
+static unsigned char *iobuf;
+static unsigned char *bbt;
+
+static int pgsize;
+static int ebcnt;
+static int pgcnt;
+static int goodebcnt;
+static struct timeval start, finish;
+
+
+static int erase_eraseblock(int ebnum)
+{
+ int err;
+ struct erase_info ei;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ memset(&ei, 0, sizeof(struct erase_info));
+ ei.mtd = mtd;
+ ei.addr = addr;
+ ei.len = mtd->erasesize;
+
+ err = mtd_erase(mtd, &ei);
+ if (err) {
+ pr_err("error %d while erasing EB %d\n", err, ebnum);
+ return err;
+ }
+
+ if (ei.state == MTD_ERASE_FAILED) {
+ pr_err("some erase error occurred at EB %d\n",
+ ebnum);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int multiblock_erase(int ebnum, int blocks)
+{
+ int err;
+ struct erase_info ei;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ memset(&ei, 0, sizeof(struct erase_info));
+ ei.mtd = mtd;
+ ei.addr = addr;
+ ei.len = mtd->erasesize * blocks;
+
+ err = mtd_erase(mtd, &ei);
+ if (err) {
+ pr_err("error %d while erasing EB %d, blocks %d\n",
+ err, ebnum, blocks);
+ return err;
+ }
+
+ if (ei.state == MTD_ERASE_FAILED) {
+ pr_err("some erase error occurred at EB %d,"
+ "blocks %d\n", ebnum, blocks);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int erase_whole_device(void)
+{
+ int err;
+ unsigned int i;
+
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = erase_eraseblock(i);
+ if (err)
+ return err;
+ cond_resched();
+ }
+ return 0;
+}
+
+static int write_eraseblock(int ebnum)
+{
+ size_t written;
+ int err = 0;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ err = mtd_write(mtd, addr, mtd->erasesize, &written, iobuf);
+ if (err || written != mtd->erasesize) {
+ pr_err("error: write failed at %#llx\n", addr);
+ if (!err)
+ err = -EINVAL;
+ }
+
+ return err;
+}
+
+static int write_eraseblock_by_page(int ebnum)
+{
+ size_t written;
+ int i, err = 0;
+ loff_t addr = ebnum * mtd->erasesize;
+ void *buf = iobuf;
+
+ for (i = 0; i < pgcnt; i++) {
+ err = mtd_write(mtd, addr, pgsize, &written, buf);
+ if (err || written != pgsize) {
+ pr_err("error: write failed at %#llx\n",
+ addr);
+ if (!err)
+ err = -EINVAL;
+ break;
+ }
+ addr += pgsize;
+ buf += pgsize;
+ }
+
+ return err;
+}
+
+static int write_eraseblock_by_2pages(int ebnum)
+{
+ size_t written, sz = pgsize * 2;
+ int i, n = pgcnt / 2, err = 0;
+ loff_t addr = ebnum * mtd->erasesize;
+ void *buf = iobuf;
+
+ for (i = 0; i < n; i++) {
+ err = mtd_write(mtd, addr, sz, &written, buf);
+ if (err || written != sz) {
+ pr_err("error: write failed at %#llx\n",
+ addr);
+ if (!err)
+ err = -EINVAL;
+ return err;
+ }
+ addr += sz;
+ buf += sz;
+ }
+ if (pgcnt % 2) {
+ err = mtd_write(mtd, addr, pgsize, &written, buf);
+ if (err || written != pgsize) {
+ pr_err("error: write failed at %#llx\n",
+ addr);
+ if (!err)
+ err = -EINVAL;
+ }
+ }
+
+ return err;
+}
+
+static int read_eraseblock(int ebnum)
+{
+ size_t read;
+ int err = 0;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ err = mtd_read(mtd, addr, mtd->erasesize, &read, iobuf);
+ /* Ignore corrected ECC errors */
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != mtd->erasesize) {
+ pr_err("error: read failed at %#llx\n", addr);
+ if (!err)
+ err = -EINVAL;
+ }
+
+ return err;
+}
+
+static int read_eraseblock_by_page(int ebnum)
+{
+ size_t read;
+ int i, err = 0;
+ loff_t addr = ebnum * mtd->erasesize;
+ void *buf = iobuf;
+
+ for (i = 0; i < pgcnt; i++) {
+ err = mtd_read(mtd, addr, pgsize, &read, buf);
+ /* Ignore corrected ECC errors */
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != pgsize) {
+ pr_err("error: read failed at %#llx\n",
+ addr);
+ if (!err)
+ err = -EINVAL;
+ break;
+ }
+ addr += pgsize;
+ buf += pgsize;
+ }
+
+ return err;
+}
+
+static int read_eraseblock_by_2pages(int ebnum)
+{
+ size_t read, sz = pgsize * 2;
+ int i, n = pgcnt / 2, err = 0;
+ loff_t addr = ebnum * mtd->erasesize;
+ void *buf = iobuf;
+
+ for (i = 0; i < n; i++) {
+ err = mtd_read(mtd, addr, sz, &read, buf);
+ /* Ignore corrected ECC errors */
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != sz) {
+ pr_err("error: read failed at %#llx\n",
+ addr);
+ if (!err)
+ err = -EINVAL;
+ return err;
+ }
+ addr += sz;
+ buf += sz;
+ }
+ if (pgcnt % 2) {
+ err = mtd_read(mtd, addr, pgsize, &read, buf);
+ /* Ignore corrected ECC errors */
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (err || read != pgsize) {
+ pr_err("error: read failed at %#llx\n",
+ addr);
+ if (!err)
+ err = -EINVAL;
+ }
+ }
+
+ return err;
+}
+
+static int is_block_bad(int ebnum)
+{
+ loff_t addr = ebnum * mtd->erasesize;
+ int ret;
+
+ ret = mtd_block_isbad(mtd, addr);
+ if (ret)
+ pr_info("block %d is bad\n", ebnum);
+ return ret;
+}
+
+static inline void start_timing(void)
+{
+ do_gettimeofday(&start);
+}
+
+static inline void stop_timing(void)
+{
+ do_gettimeofday(&finish);
+}
+
+static long calc_speed(void)
+{
+ uint64_t k;
+ long ms;
+
+ ms = (finish.tv_sec - start.tv_sec) * 1000 +
+ (finish.tv_usec - start.tv_usec) / 1000;
+ if (ms == 0)
+ return 0;
+ k = goodebcnt * (mtd->erasesize / 1024) * 1000;
+ do_div(k, ms);
+ return k;
+}
+
+static int scan_for_bad_eraseblocks(void)
+{
+ int i, bad = 0;
+
+ bbt = kzalloc(ebcnt, GFP_KERNEL);
+ if (!bbt)
+ return -ENOMEM;
+
+ if (!mtd_can_have_bb(mtd))
+ goto out;
+
+ pr_info("scanning for bad eraseblocks\n");
+ for (i = 0; i < ebcnt; ++i) {
+ bbt[i] = is_block_bad(i) ? 1 : 0;
+ if (bbt[i])
+ bad += 1;
+ cond_resched();
+ }
+ pr_info("scanned %d eraseblocks, %d are bad\n", i, bad);
+out:
+ goodebcnt = ebcnt - bad;
+ return 0;
+}
+
+static int __init mtd_speedtest_init(void)
+{
+ int err, i, blocks, j, k;
+ long speed;
+ uint64_t tmp;
+
+ printk(KERN_INFO "\n");
+ printk(KERN_INFO "=================================================\n");
+
+ if (dev < 0) {
+ pr_info("Please specify a valid mtd-device via module parameter\n");
+ pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
+ return -EINVAL;
+ }
+
+ if (count)
+ pr_info("MTD device: %d count: %d\n", dev, count);
+ else
+ pr_info("MTD device: %d\n", dev);
+
+ mtd = get_mtd_device(NULL, dev);
+ if (IS_ERR(mtd)) {
+ err = PTR_ERR(mtd);
+ pr_err("error: cannot get MTD device\n");
+ return err;
+ }
+
+ if (mtd->writesize == 1) {
+ pr_info("not NAND flash, assume page size is 512 "
+ "bytes.\n");
+ pgsize = 512;
+ } else
+ pgsize = mtd->writesize;
+
+ tmp = mtd->size;
+ do_div(tmp, mtd->erasesize);
+ ebcnt = tmp;
+ pgcnt = mtd->erasesize / pgsize;
+
+ pr_info("MTD device size %llu, eraseblock size %u, "
+ "page size %u, count of eraseblocks %u, pages per "
+ "eraseblock %u, OOB size %u\n",
+ (unsigned long long)mtd->size, mtd->erasesize,
+ pgsize, ebcnt, pgcnt, mtd->oobsize);
+
+ if (count > 0 && count < ebcnt)
+ ebcnt = count;
+
+ err = -ENOMEM;
+ iobuf = kmalloc(mtd->erasesize, GFP_KERNEL);
+ if (!iobuf)
+ goto out;
+
+ prandom_bytes(iobuf, mtd->erasesize);
+
+ err = scan_for_bad_eraseblocks();
+ if (err)
+ goto out;
+
+ err = erase_whole_device();
+ if (err)
+ goto out;
+
+ /* Write all eraseblocks, 1 eraseblock at a time */
+ pr_info("testing eraseblock write speed\n");
+ start_timing();
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = write_eraseblock(i);
+ if (err)
+ goto out;
+ cond_resched();
+ }
+ stop_timing();
+ speed = calc_speed();
+ pr_info("eraseblock write speed is %ld KiB/s\n", speed);
+
+ /* Read all eraseblocks, 1 eraseblock at a time */
+ pr_info("testing eraseblock read speed\n");
+ start_timing();
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = read_eraseblock(i);
+ if (err)
+ goto out;
+ cond_resched();
+ }
+ stop_timing();
+ speed = calc_speed();
+ pr_info("eraseblock read speed is %ld KiB/s\n", speed);
+
+ err = erase_whole_device();
+ if (err)
+ goto out;
+
+ /* Write all eraseblocks, 1 page at a time */
+ pr_info("testing page write speed\n");
+ start_timing();
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = write_eraseblock_by_page(i);
+ if (err)
+ goto out;
+ cond_resched();
+ }
+ stop_timing();
+ speed = calc_speed();
+ pr_info("page write speed is %ld KiB/s\n", speed);
+
+ /* Read all eraseblocks, 1 page at a time */
+ pr_info("testing page read speed\n");
+ start_timing();
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = read_eraseblock_by_page(i);
+ if (err)
+ goto out;
+ cond_resched();
+ }
+ stop_timing();
+ speed = calc_speed();
+ pr_info("page read speed is %ld KiB/s\n", speed);
+
+ err = erase_whole_device();
+ if (err)
+ goto out;
+
+ /* Write all eraseblocks, 2 pages at a time */
+ pr_info("testing 2 page write speed\n");
+ start_timing();
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = write_eraseblock_by_2pages(i);
+ if (err)
+ goto out;
+ cond_resched();
+ }
+ stop_timing();
+ speed = calc_speed();
+ pr_info("2 page write speed is %ld KiB/s\n", speed);
+
+ /* Read all eraseblocks, 2 pages at a time */
+ pr_info("testing 2 page read speed\n");
+ start_timing();
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = read_eraseblock_by_2pages(i);
+ if (err)
+ goto out;
+ cond_resched();
+ }
+ stop_timing();
+ speed = calc_speed();
+ pr_info("2 page read speed is %ld KiB/s\n", speed);
+
+ /* Erase all eraseblocks */
+ pr_info("Testing erase speed\n");
+ start_timing();
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = erase_eraseblock(i);
+ if (err)
+ goto out;
+ cond_resched();
+ }
+ stop_timing();
+ speed = calc_speed();
+ pr_info("erase speed is %ld KiB/s\n", speed);
+
+ /* Multi-block erase all eraseblocks */
+ for (k = 1; k < 7; k++) {
+ blocks = 1 << k;
+ pr_info("Testing %dx multi-block erase speed\n",
+ blocks);
+ start_timing();
+ for (i = 0; i < ebcnt; ) {
+ for (j = 0; j < blocks && (i + j) < ebcnt; j++)
+ if (bbt[i + j])
+ break;
+ if (j < 1) {
+ i++;
+ continue;
+ }
+ err = multiblock_erase(i, j);
+ if (err)
+ goto out;
+ cond_resched();
+ i += j;
+ }
+ stop_timing();
+ speed = calc_speed();
+ pr_info("%dx multi-block erase speed is %ld KiB/s\n",
+ blocks, speed);
+ }
+ pr_info("finished\n");
+out:
+ kfree(iobuf);
+ kfree(bbt);
+ put_mtd_device(mtd);
+ if (err)
+ pr_info("error %d occurred\n", err);
+ printk(KERN_INFO "=================================================\n");
+ return err;
+}
+module_init(mtd_speedtest_init);
+
+static void __exit mtd_speedtest_exit(void)
+{
+ return;
+}
+module_exit(mtd_speedtest_exit);
+
+MODULE_DESCRIPTION("Speed test module");
+MODULE_AUTHOR("Adrian Hunter");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Copyright (C) 2006-2008 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; see the file COPYING. If not, write to the Free Software
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Test random reads, writes and erases on MTD device.
+ *
+ * Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/err.h>
+#include <linux/mtd/mtd.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/vmalloc.h>
+#include <linux/random.h>
+
+static int dev = -EINVAL;
+module_param(dev, int, S_IRUGO);
+MODULE_PARM_DESC(dev, "MTD device number to use");
+
+static int count = 10000;
+module_param(count, int, S_IRUGO);
+MODULE_PARM_DESC(count, "Number of operations to do (default is 10000)");
+
+static struct mtd_info *mtd;
+static unsigned char *writebuf;
+static unsigned char *readbuf;
+static unsigned char *bbt;
+static int *offsets;
+
+static int pgsize;
+static int bufsize;
+static int ebcnt;
+static int pgcnt;
+
+static int rand_eb(void)
+{
+ unsigned int eb;
+
+again:
+ eb = prandom_u32();
+ /* Read or write up 2 eraseblocks at a time - hence 'ebcnt - 1' */
+ eb %= (ebcnt - 1);
+ if (bbt[eb])
+ goto again;
+ return eb;
+}
+
+static int rand_offs(void)
+{
+ unsigned int offs;
+
+ offs = prandom_u32();
+ offs %= bufsize;
+ return offs;
+}
+
+static int rand_len(int offs)
+{
+ unsigned int len;
+
+ len = prandom_u32();
+ len %= (bufsize - offs);
+ return len;
+}
+
+static int erase_eraseblock(int ebnum)
+{
+ int err;
+ struct erase_info ei;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ memset(&ei, 0, sizeof(struct erase_info));
+ ei.mtd = mtd;
+ ei.addr = addr;
+ ei.len = mtd->erasesize;
+
+ err = mtd_erase(mtd, &ei);
+ if (unlikely(err)) {
+ pr_err("error %d while erasing EB %d\n", err, ebnum);
+ return err;
+ }
+
+ if (unlikely(ei.state == MTD_ERASE_FAILED)) {
+ pr_err("some erase error occurred at EB %d\n",
+ ebnum);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int is_block_bad(int ebnum)
+{
+ loff_t addr = ebnum * mtd->erasesize;
+ int ret;
+
+ ret = mtd_block_isbad(mtd, addr);
+ if (ret)
+ pr_info("block %d is bad\n", ebnum);
+ return ret;
+}
+
+static int do_read(void)
+{
+ size_t read;
+ int eb = rand_eb();
+ int offs = rand_offs();
+ int len = rand_len(offs), err;
+ loff_t addr;
+
+ if (bbt[eb + 1]) {
+ if (offs >= mtd->erasesize)
+ offs -= mtd->erasesize;
+ if (offs + len > mtd->erasesize)
+ len = mtd->erasesize - offs;
+ }
+ addr = eb * mtd->erasesize + offs;
+ err = mtd_read(mtd, addr, len, &read, readbuf);
+ if (mtd_is_bitflip(err))
+ err = 0;
+ if (unlikely(err || read != len)) {
+ pr_err("error: read failed at 0x%llx\n",
+ (long long)addr);
+ if (!err)
+ err = -EINVAL;
+ return err;
+ }
+ return 0;
+}
+
+static int do_write(void)
+{
+ int eb = rand_eb(), offs, err, len;
+ size_t written;
+ loff_t addr;
+
+ offs = offsets[eb];
+ if (offs >= mtd->erasesize) {
+ err = erase_eraseblock(eb);
+ if (err)
+ return err;
+ offs = offsets[eb] = 0;
+ }
+ len = rand_len(offs);
+ len = ((len + pgsize - 1) / pgsize) * pgsize;
+ if (offs + len > mtd->erasesize) {
+ if (bbt[eb + 1])
+ len = mtd->erasesize - offs;
+ else {
+ err = erase_eraseblock(eb + 1);
+ if (err)
+ return err;
+ offsets[eb + 1] = 0;
+ }
+ }
+ addr = eb * mtd->erasesize + offs;
+ err = mtd_write(mtd, addr, len, &written, writebuf);
+ if (unlikely(err || written != len)) {
+ pr_err("error: write failed at 0x%llx\n",
+ (long long)addr);
+ if (!err)
+ err = -EINVAL;
+ return err;
+ }
+ offs += len;
+ while (offs > mtd->erasesize) {
+ offsets[eb++] = mtd->erasesize;
+ offs -= mtd->erasesize;
+ }
+ offsets[eb] = offs;
+ return 0;
+}
+
+static int do_operation(void)
+{
+ if (prandom_u32() & 1)
+ return do_read();
+ else
+ return do_write();
+}
+
+static int scan_for_bad_eraseblocks(void)
+{
+ int i, bad = 0;
+
+ bbt = kzalloc(ebcnt, GFP_KERNEL);
+ if (!bbt)
+ return -ENOMEM;
+
+ if (!mtd_can_have_bb(mtd))
+ return 0;
+
+ pr_info("scanning for bad eraseblocks\n");
+ for (i = 0; i < ebcnt; ++i) {
+ bbt[i] = is_block_bad(i) ? 1 : 0;
+ if (bbt[i])
+ bad += 1;
+ cond_resched();
+ }
+ pr_info("scanned %d eraseblocks, %d are bad\n", i, bad);
+ return 0;
+}
+
+static int __init mtd_stresstest_init(void)
+{
+ int err;
+ int i, op;
+ uint64_t tmp;
+
+ printk(KERN_INFO "\n");
+ printk(KERN_INFO "=================================================\n");
+
+ if (dev < 0) {
+ pr_info("Please specify a valid mtd-device via module parameter\n");
+ pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
+ return -EINVAL;
+ }
+
+ pr_info("MTD device: %d\n", dev);
+
+ mtd = get_mtd_device(NULL, dev);
+ if (IS_ERR(mtd)) {
+ err = PTR_ERR(mtd);
+ pr_err("error: cannot get MTD device\n");
+ return err;
+ }
+
+ if (mtd->writesize == 1) {
+ pr_info("not NAND flash, assume page size is 512 "
+ "bytes.\n");
+ pgsize = 512;
+ } else
+ pgsize = mtd->writesize;
+
+ tmp = mtd->size;
+ do_div(tmp, mtd->erasesize);
+ ebcnt = tmp;
+ pgcnt = mtd->erasesize / pgsize;
+
+ pr_info("MTD device size %llu, eraseblock size %u, "
+ "page size %u, count of eraseblocks %u, pages per "
+ "eraseblock %u, OOB size %u\n",
+ (unsigned long long)mtd->size, mtd->erasesize,
+ pgsize, ebcnt, pgcnt, mtd->oobsize);
+
+ if (ebcnt < 2) {
+ pr_err("error: need at least 2 eraseblocks\n");
+ err = -ENOSPC;
+ goto out_put_mtd;
+ }
+
+ /* Read or write up 2 eraseblocks at a time */
+ bufsize = mtd->erasesize * 2;
+
+ err = -ENOMEM;
+ readbuf = vmalloc(bufsize);
+ writebuf = vmalloc(bufsize);
+ offsets = kmalloc(ebcnt * sizeof(int), GFP_KERNEL);
+ if (!readbuf || !writebuf || !offsets)
+ goto out;
+ for (i = 0; i < ebcnt; i++)
+ offsets[i] = mtd->erasesize;
+ prandom_bytes(writebuf, bufsize);
+
+ err = scan_for_bad_eraseblocks();
+ if (err)
+ goto out;
+
+ /* Do operations */
+ pr_info("doing operations\n");
+ for (op = 0; op < count; op++) {
+ if ((op & 1023) == 0)
+ pr_info("%d operations done\n", op);
+ err = do_operation();
+ if (err)
+ goto out;
+ cond_resched();
+ }
+ pr_info("finished, %d operations done\n", op);
+
+out:
+ kfree(offsets);
+ kfree(bbt);
+ vfree(writebuf);
+ vfree(readbuf);
+out_put_mtd:
+ put_mtd_device(mtd);
+ if (err)
+ pr_info("error %d occurred\n", err);
+ printk(KERN_INFO "=================================================\n");
+ return err;
+}
+module_init(mtd_stresstest_init);
+
+static void __exit mtd_stresstest_exit(void)
+{
+ return;
+}
+module_exit(mtd_stresstest_exit);
+
+MODULE_DESCRIPTION("Stress test module");
+MODULE_AUTHOR("Adrian Hunter");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Copyright (C) 2006-2007 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; see the file COPYING. If not, write to the Free Software
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Test sub-page read and write on MTD device.
+ * Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/err.h>
+#include <linux/mtd/mtd.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/random.h>
+
+static int dev = -EINVAL;
+module_param(dev, int, S_IRUGO);
+MODULE_PARM_DESC(dev, "MTD device number to use");
+
+static struct mtd_info *mtd;
+static unsigned char *writebuf;
+static unsigned char *readbuf;
+static unsigned char *bbt;
+
+static int subpgsize;
+static int bufsize;
+static int ebcnt;
+static int pgcnt;
+static int errcnt;
+static struct rnd_state rnd_state;
+
+static inline void clear_data(unsigned char *buf, size_t len)
+{
+ memset(buf, 0, len);
+}
+
+static int erase_eraseblock(int ebnum)
+{
+ int err;
+ struct erase_info ei;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ memset(&ei, 0, sizeof(struct erase_info));
+ ei.mtd = mtd;
+ ei.addr = addr;
+ ei.len = mtd->erasesize;
+
+ err = mtd_erase(mtd, &ei);
+ if (err) {
+ pr_err("error %d while erasing EB %d\n", err, ebnum);
+ return err;
+ }
+
+ if (ei.state == MTD_ERASE_FAILED) {
+ pr_err("some erase error occurred at EB %d\n",
+ ebnum);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int erase_whole_device(void)
+{
+ int err;
+ unsigned int i;
+
+ pr_info("erasing whole device\n");
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = erase_eraseblock(i);
+ if (err)
+ return err;
+ cond_resched();
+ }
+ pr_info("erased %u eraseblocks\n", i);
+ return 0;
+}
+
+static int write_eraseblock(int ebnum)
+{
+ size_t written;
+ int err = 0;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ prandom_bytes_state(&rnd_state, writebuf, subpgsize);
+ err = mtd_write(mtd, addr, subpgsize, &written, writebuf);
+ if (unlikely(err || written != subpgsize)) {
+ pr_err("error: write failed at %#llx\n",
+ (long long)addr);
+ if (written != subpgsize) {
+ pr_err(" write size: %#x\n", subpgsize);
+ pr_err(" written: %#zx\n", written);
+ }
+ return err ? err : -1;
+ }
+
+ addr += subpgsize;
+
+ prandom_bytes_state(&rnd_state, writebuf, subpgsize);
+ err = mtd_write(mtd, addr, subpgsize, &written, writebuf);
+ if (unlikely(err || written != subpgsize)) {
+ pr_err("error: write failed at %#llx\n",
+ (long long)addr);
+ if (written != subpgsize) {
+ pr_err(" write size: %#x\n", subpgsize);
+ pr_err(" written: %#zx\n", written);
+ }
+ return err ? err : -1;
+ }
+
+ return err;
+}
+
+static int write_eraseblock2(int ebnum)
+{
+ size_t written;
+ int err = 0, k;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ for (k = 1; k < 33; ++k) {
+ if (addr + (subpgsize * k) > (ebnum + 1) * mtd->erasesize)
+ break;
+ prandom_bytes_state(&rnd_state, writebuf, subpgsize * k);
+ err = mtd_write(mtd, addr, subpgsize * k, &written, writebuf);
+ if (unlikely(err || written != subpgsize * k)) {
+ pr_err("error: write failed at %#llx\n",
+ (long long)addr);
+ if (written != subpgsize) {
+ pr_err(" write size: %#x\n",
+ subpgsize * k);
+ pr_err(" written: %#08zx\n",
+ written);
+ }
+ return err ? err : -1;
+ }
+ addr += subpgsize * k;
+ }
+
+ return err;
+}
+
+static void print_subpage(unsigned char *p)
+{
+ int i, j;
+
+ for (i = 0; i < subpgsize; ) {
+ for (j = 0; i < subpgsize && j < 32; ++i, ++j)
+ printk("%02x", *p++);
+ printk("\n");
+ }
+}
+
+static int verify_eraseblock(int ebnum)
+{
+ size_t read;
+ int err = 0;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ prandom_bytes_state(&rnd_state, writebuf, subpgsize);
+ clear_data(readbuf, subpgsize);
+ err = mtd_read(mtd, addr, subpgsize, &read, readbuf);
+ if (unlikely(err || read != subpgsize)) {
+ if (mtd_is_bitflip(err) && read == subpgsize) {
+ pr_info("ECC correction at %#llx\n",
+ (long long)addr);
+ err = 0;
+ } else {
+ pr_err("error: read failed at %#llx\n",
+ (long long)addr);
+ return err ? err : -1;
+ }
+ }
+ if (unlikely(memcmp(readbuf, writebuf, subpgsize))) {
+ pr_err("error: verify failed at %#llx\n",
+ (long long)addr);
+ pr_info("------------- written----------------\n");
+ print_subpage(writebuf);
+ pr_info("------------- read ------------------\n");
+ print_subpage(readbuf);
+ pr_info("-------------------------------------\n");
+ errcnt += 1;
+ }
+
+ addr += subpgsize;
+
+ prandom_bytes_state(&rnd_state, writebuf, subpgsize);
+ clear_data(readbuf, subpgsize);
+ err = mtd_read(mtd, addr, subpgsize, &read, readbuf);
+ if (unlikely(err || read != subpgsize)) {
+ if (mtd_is_bitflip(err) && read == subpgsize) {
+ pr_info("ECC correction at %#llx\n",
+ (long long)addr);
+ err = 0;
+ } else {
+ pr_err("error: read failed at %#llx\n",
+ (long long)addr);
+ return err ? err : -1;
+ }
+ }
+ if (unlikely(memcmp(readbuf, writebuf, subpgsize))) {
+ pr_info("error: verify failed at %#llx\n",
+ (long long)addr);
+ pr_info("------------- written----------------\n");
+ print_subpage(writebuf);
+ pr_info("------------- read ------------------\n");
+ print_subpage(readbuf);
+ pr_info("-------------------------------------\n");
+ errcnt += 1;
+ }
+
+ return err;
+}
+
+static int verify_eraseblock2(int ebnum)
+{
+ size_t read;
+ int err = 0, k;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ for (k = 1; k < 33; ++k) {
+ if (addr + (subpgsize * k) > (ebnum + 1) * mtd->erasesize)
+ break;
+ prandom_bytes_state(&rnd_state, writebuf, subpgsize * k);
+ clear_data(readbuf, subpgsize * k);
+ err = mtd_read(mtd, addr, subpgsize * k, &read, readbuf);
+ if (unlikely(err || read != subpgsize * k)) {
+ if (mtd_is_bitflip(err) && read == subpgsize * k) {
+ pr_info("ECC correction at %#llx\n",
+ (long long)addr);
+ err = 0;
+ } else {
+ pr_err("error: read failed at "
+ "%#llx\n", (long long)addr);
+ return err ? err : -1;
+ }
+ }
+ if (unlikely(memcmp(readbuf, writebuf, subpgsize * k))) {
+ pr_err("error: verify failed at %#llx\n",
+ (long long)addr);
+ errcnt += 1;
+ }
+ addr += subpgsize * k;
+ }
+
+ return err;
+}
+
+static int verify_eraseblock_ff(int ebnum)
+{
+ uint32_t j;
+ size_t read;
+ int err = 0;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ memset(writebuf, 0xff, subpgsize);
+ for (j = 0; j < mtd->erasesize / subpgsize; ++j) {
+ clear_data(readbuf, subpgsize);
+ err = mtd_read(mtd, addr, subpgsize, &read, readbuf);
+ if (unlikely(err || read != subpgsize)) {
+ if (mtd_is_bitflip(err) && read == subpgsize) {
+ pr_info("ECC correction at %#llx\n",
+ (long long)addr);
+ err = 0;
+ } else {
+ pr_err("error: read failed at "
+ "%#llx\n", (long long)addr);
+ return err ? err : -1;
+ }
+ }
+ if (unlikely(memcmp(readbuf, writebuf, subpgsize))) {
+ pr_err("error: verify 0xff failed at "
+ "%#llx\n", (long long)addr);
+ errcnt += 1;
+ }
+ addr += subpgsize;
+ }
+
+ return err;
+}
+
+static int verify_all_eraseblocks_ff(void)
+{
+ int err;
+ unsigned int i;
+
+ pr_info("verifying all eraseblocks for 0xff\n");
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = verify_eraseblock_ff(i);
+ if (err)
+ return err;
+ if (i % 256 == 0)
+ pr_info("verified up to eraseblock %u\n", i);
+ cond_resched();
+ }
+ pr_info("verified %u eraseblocks\n", i);
+ return 0;
+}
+
+static int is_block_bad(int ebnum)
+{
+ loff_t addr = ebnum * mtd->erasesize;
+ int ret;
+
+ ret = mtd_block_isbad(mtd, addr);
+ if (ret)
+ pr_info("block %d is bad\n", ebnum);
+ return ret;
+}
+
+static int scan_for_bad_eraseblocks(void)
+{
+ int i, bad = 0;
+
+ bbt = kzalloc(ebcnt, GFP_KERNEL);
+ if (!bbt)
+ return -ENOMEM;
+
+ pr_info("scanning for bad eraseblocks\n");
+ for (i = 0; i < ebcnt; ++i) {
+ bbt[i] = is_block_bad(i) ? 1 : 0;
+ if (bbt[i])
+ bad += 1;
+ cond_resched();
+ }
+ pr_info("scanned %d eraseblocks, %d are bad\n", i, bad);
+ return 0;
+}
+
+static int __init mtd_subpagetest_init(void)
+{
+ int err = 0;
+ uint32_t i;
+ uint64_t tmp;
+
+ printk(KERN_INFO "\n");
+ printk(KERN_INFO "=================================================\n");
+
+ if (dev < 0) {
+ pr_info("Please specify a valid mtd-device via module parameter\n");
+ pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
+ return -EINVAL;
+ }
+
+ pr_info("MTD device: %d\n", dev);
+
+ mtd = get_mtd_device(NULL, dev);
+ if (IS_ERR(mtd)) {
+ err = PTR_ERR(mtd);
+ pr_err("error: cannot get MTD device\n");
+ return err;
+ }
+
+ if (mtd->type != MTD_NANDFLASH) {
+ pr_info("this test requires NAND flash\n");
+ goto out;
+ }
+
+ subpgsize = mtd->writesize >> mtd->subpage_sft;
+ tmp = mtd->size;
+ do_div(tmp, mtd->erasesize);
+ ebcnt = tmp;
+ pgcnt = mtd->erasesize / mtd->writesize;
+
+ pr_info("MTD device size %llu, eraseblock size %u, "
+ "page size %u, subpage size %u, count of eraseblocks %u, "
+ "pages per eraseblock %u, OOB size %u\n",
+ (unsigned long long)mtd->size, mtd->erasesize,
+ mtd->writesize, subpgsize, ebcnt, pgcnt, mtd->oobsize);
+
+ err = -ENOMEM;
+ bufsize = subpgsize * 32;
+ writebuf = kmalloc(bufsize, GFP_KERNEL);
+ if (!writebuf)
+ goto out;
+ readbuf = kmalloc(bufsize, GFP_KERNEL);
+ if (!readbuf)
+ goto out;
+
+ err = scan_for_bad_eraseblocks();
+ if (err)
+ goto out;
+
+ err = erase_whole_device();
+ if (err)
+ goto out;
+
+ pr_info("writing whole device\n");
+ prandom_seed_state(&rnd_state, 1);
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = write_eraseblock(i);
+ if (unlikely(err))
+ goto out;
+ if (i % 256 == 0)
+ pr_info("written up to eraseblock %u\n", i);
+ cond_resched();
+ }
+ pr_info("written %u eraseblocks\n", i);
+
+ prandom_seed_state(&rnd_state, 1);
+ pr_info("verifying all eraseblocks\n");
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = verify_eraseblock(i);
+ if (unlikely(err))
+ goto out;
+ if (i % 256 == 0)
+ pr_info("verified up to eraseblock %u\n", i);
+ cond_resched();
+ }
+ pr_info("verified %u eraseblocks\n", i);
+
+ err = erase_whole_device();
+ if (err)
+ goto out;
+
+ err = verify_all_eraseblocks_ff();
+ if (err)
+ goto out;
+
+ /* Write all eraseblocks */
+ prandom_seed_state(&rnd_state, 3);
+ pr_info("writing whole device\n");
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = write_eraseblock2(i);
+ if (unlikely(err))
+ goto out;
+ if (i % 256 == 0)
+ pr_info("written up to eraseblock %u\n", i);
+ cond_resched();
+ }
+ pr_info("written %u eraseblocks\n", i);
+
+ /* Check all eraseblocks */
+ prandom_seed_state(&rnd_state, 3);
+ pr_info("verifying all eraseblocks\n");
+ for (i = 0; i < ebcnt; ++i) {
+ if (bbt[i])
+ continue;
+ err = verify_eraseblock2(i);
+ if (unlikely(err))
+ goto out;
+ if (i % 256 == 0)
+ pr_info("verified up to eraseblock %u\n", i);
+ cond_resched();
+ }
+ pr_info("verified %u eraseblocks\n", i);
+
+ err = erase_whole_device();
+ if (err)
+ goto out;
+
+ err = verify_all_eraseblocks_ff();
+ if (err)
+ goto out;
+
+ pr_info("finished with %d errors\n", errcnt);
+
+out:
+ kfree(bbt);
+ kfree(readbuf);
+ kfree(writebuf);
+ put_mtd_device(mtd);
+ if (err)
+ pr_info("error %d occurred\n", err);
+ printk(KERN_INFO "=================================================\n");
+ return err;
+}
+module_init(mtd_subpagetest_init);
+
+static void __exit mtd_subpagetest_exit(void)
+{
+ return;
+}
+module_exit(mtd_subpagetest_exit);
+
+MODULE_DESCRIPTION("Subpage test module");
+MODULE_AUTHOR("Adrian Hunter");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Copyright (C) 2006-2008 Artem Bityutskiy
+ * Copyright (C) 2006-2008 Jarkko Lavinen
+ * Copyright (C) 2006-2008 Adrian Hunter
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; see the file COPYING. If not, write to the Free Software
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Authors: Artem Bityutskiy, Jarkko Lavinen, Adria Hunter
+ *
+ * WARNING: this test program may kill your flash and your device. Do not
+ * use it unless you know what you do. Authors are not responsible for any
+ * damage caused by this program.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/err.h>
+#include <linux/mtd/mtd.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+
+#define RETRIES 3
+
+static int eb = 8;
+module_param(eb, int, S_IRUGO);
+MODULE_PARM_DESC(eb, "eraseblock number within the selected MTD device");
+
+static int ebcnt = 32;
+module_param(ebcnt, int, S_IRUGO);
+MODULE_PARM_DESC(ebcnt, "number of consecutive eraseblocks to torture");
+
+static int pgcnt;
+module_param(pgcnt, int, S_IRUGO);
+MODULE_PARM_DESC(pgcnt, "number of pages per eraseblock to torture (0 => all)");
+
+static int dev = -EINVAL;
+module_param(dev, int, S_IRUGO);
+MODULE_PARM_DESC(dev, "MTD device number to use");
+
+static int gran = 512;
+module_param(gran, int, S_IRUGO);
+MODULE_PARM_DESC(gran, "how often the status information should be printed");
+
+static int check = 1;
+module_param(check, int, S_IRUGO);
+MODULE_PARM_DESC(check, "if the written data should be checked");
+
+static unsigned int cycles_count;
+module_param(cycles_count, uint, S_IRUGO);
+MODULE_PARM_DESC(cycles_count, "how many erase cycles to do "
+ "(infinite by default)");
+
+static struct mtd_info *mtd;
+
+/* This buffer contains 0x555555...0xAAAAAA... pattern */
+static unsigned char *patt_5A5;
+/* This buffer contains 0xAAAAAA...0x555555... pattern */
+static unsigned char *patt_A5A;
+/* This buffer contains all 0xFF bytes */
+static unsigned char *patt_FF;
+/* This a temporary buffer is use when checking data */
+static unsigned char *check_buf;
+/* How many erase cycles were done */
+static unsigned int erase_cycles;
+
+static int pgsize;
+static struct timeval start, finish;
+
+static void report_corrupt(unsigned char *read, unsigned char *written);
+
+static inline void start_timing(void)
+{
+ do_gettimeofday(&start);
+}
+
+static inline void stop_timing(void)
+{
+ do_gettimeofday(&finish);
+}
+
+/*
+ * Erase eraseblock number @ebnum.
+ */
+static inline int erase_eraseblock(int ebnum)
+{
+ int err;
+ struct erase_info ei;
+ loff_t addr = ebnum * mtd->erasesize;
+
+ memset(&ei, 0, sizeof(struct erase_info));
+ ei.mtd = mtd;
+ ei.addr = addr;
+ ei.len = mtd->erasesize;
+
+ err = mtd_erase(mtd, &ei);
+ if (err) {
+ pr_err("error %d while erasing EB %d\n", err, ebnum);
+ return err;
+ }
+
+ if (ei.state == MTD_ERASE_FAILED) {
+ pr_err("some erase error occurred at EB %d\n",
+ ebnum);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+/*
+ * Check that the contents of eraseblock number @enbum is equivalent to the
+ * @buf buffer.
+ */
+static inline int check_eraseblock(int ebnum, unsigned char *buf)
+{
+ int err, retries = 0;
+ size_t read;
+ loff_t addr = ebnum * mtd->erasesize;
+ size_t len = mtd->erasesize;
+
+ if (pgcnt) {
+ addr = (ebnum + 1) * mtd->erasesize - pgcnt * pgsize;
+ len = pgcnt * pgsize;
+ }
+
+retry:
+ err = mtd_read(mtd, addr, len, &read, check_buf);
+ if (mtd_is_bitflip(err))
+ pr_err("single bit flip occurred at EB %d "
+ "MTD reported that it was fixed.\n", ebnum);
+ else if (err) {
+ pr_err("error %d while reading EB %d, "
+ "read %zd\n", err, ebnum, read);
+ return err;
+ }
+
+ if (read != len) {
+ pr_err("failed to read %zd bytes from EB %d, "
+ "read only %zd, but no error reported\n",
+ len, ebnum, read);
+ return -EIO;
+ }
+
+ if (memcmp(buf, check_buf, len)) {
+ pr_err("read wrong data from EB %d\n", ebnum);
+ report_corrupt(check_buf, buf);
+
+ if (retries++ < RETRIES) {
+ /* Try read again */
+ yield();
+ pr_info("re-try reading data from EB %d\n",
+ ebnum);
+ goto retry;
+ } else {
+ pr_info("retried %d times, still errors, "
+ "give-up\n", RETRIES);
+ return -EINVAL;
+ }
+ }
+
+ if (retries != 0)
+ pr_info("only attempt number %d was OK (!!!)\n",
+ retries);
+
+ return 0;
+}
+
+static inline int write_pattern(int ebnum, void *buf)
+{
+ int err;
+ size_t written;
+ loff_t addr = ebnum * mtd->erasesize;
+ size_t len = mtd->erasesize;
+
+ if (pgcnt) {
+ addr = (ebnum + 1) * mtd->erasesize - pgcnt * pgsize;
+ len = pgcnt * pgsize;
+ }
+ err = mtd_write(mtd, addr, len, &written, buf);
+ if (err) {
+ pr_err("error %d while writing EB %d, written %zd"
+ " bytes\n", err, ebnum, written);
+ return err;
+ }
+ if (written != len) {
+ pr_info("written only %zd bytes of %zd, but no error"
+ " reported\n", written, len);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int __init tort_init(void)
+{
+ int err = 0, i, infinite = !cycles_count;
+ int *bad_ebs;
+
+ printk(KERN_INFO "\n");
+ printk(KERN_INFO "=================================================\n");
+ pr_info("Warning: this program is trying to wear out your "
+ "flash, stop it if this is not wanted.\n");
+
+ if (dev < 0) {
+ pr_info("Please specify a valid mtd-device via module parameter\n");
+ pr_crit("CAREFUL: This test wipes all data on the specified MTD device!\n");
+ return -EINVAL;
+ }
+
+ pr_info("MTD device: %d\n", dev);
+ pr_info("torture %d eraseblocks (%d-%d) of mtd%d\n",
+ ebcnt, eb, eb + ebcnt - 1, dev);
+ if (pgcnt)
+ pr_info("torturing just %d pages per eraseblock\n",
+ pgcnt);
+ pr_info("write verify %s\n", check ? "enabled" : "disabled");
+
+ mtd = get_mtd_device(NULL, dev);
+ if (IS_ERR(mtd)) {
+ err = PTR_ERR(mtd);
+ pr_err("error: cannot get MTD device\n");
+ return err;
+ }
+
+ if (mtd->writesize == 1) {
+ pr_info("not NAND flash, assume page size is 512 "
+ "bytes.\n");
+ pgsize = 512;
+ } else
+ pgsize = mtd->writesize;
+
+ if (pgcnt && (pgcnt > mtd->erasesize / pgsize || pgcnt < 0)) {
+ pr_err("error: invalid pgcnt value %d\n", pgcnt);
+ goto out_mtd;
+ }
+
+ err = -ENOMEM;
+ patt_5A5 = kmalloc(mtd->erasesize, GFP_KERNEL);
+ if (!patt_5A5)
+ goto out_mtd;
+
+ patt_A5A = kmalloc(mtd->erasesize, GFP_KERNEL);
+ if (!patt_A5A)
+ goto out_patt_5A5;
+
+ patt_FF = kmalloc(mtd->erasesize, GFP_KERNEL);
+ if (!patt_FF)
+ goto out_patt_A5A;
+
+ check_buf = kmalloc(mtd->erasesize, GFP_KERNEL);
+ if (!check_buf)
+ goto out_patt_FF;
+
+ bad_ebs = kcalloc(ebcnt, sizeof(*bad_ebs), GFP_KERNEL);
+ if (!bad_ebs)
+ goto out_check_buf;
+
+ err = 0;
+
+ /* Initialize patterns */
+ memset(patt_FF, 0xFF, mtd->erasesize);
+ for (i = 0; i < mtd->erasesize / pgsize; i++) {
+ if (!(i & 1)) {
+ memset(patt_5A5 + i * pgsize, 0x55, pgsize);
+ memset(patt_A5A + i * pgsize, 0xAA, pgsize);
+ } else {
+ memset(patt_5A5 + i * pgsize, 0xAA, pgsize);
+ memset(patt_A5A + i * pgsize, 0x55, pgsize);
+ }
+ }
+
+ /*
+ * Check if there is a bad eraseblock among those we are going to test.
+ */
+ if (mtd_can_have_bb(mtd)) {
+ for (i = eb; i < eb + ebcnt; i++) {
+ err = mtd_block_isbad(mtd, (loff_t)i * mtd->erasesize);
+
+ if (err < 0) {
+ pr_info("block_isbad() returned %d "
+ "for EB %d\n", err, i);
+ goto out;
+ }
+
+ if (err) {
+ pr_err("EB %d is bad. Skip it.\n", i);
+ bad_ebs[i - eb] = 1;
+ }
+ }
+ }
+
+ start_timing();
+ while (1) {
+ int i;
+ void *patt;
+
+ /* Erase all eraseblocks */
+ for (i = eb; i < eb + ebcnt; i++) {
+ if (bad_ebs[i - eb])
+ continue;
+ err = erase_eraseblock(i);
+ if (err)
+ goto out;
+ cond_resched();
+ }
+
+ /* Check if the eraseblocks contain only 0xFF bytes */
+ if (check) {
+ for (i = eb; i < eb + ebcnt; i++) {
+ if (bad_ebs[i - eb])
+ continue;
+ err = check_eraseblock(i, patt_FF);
+ if (err) {
+ pr_info("verify failed"
+ " for 0xFF... pattern\n");
+ goto out;
+ }
+ cond_resched();
+ }
+ }
+
+ /* Write the pattern */
+ for (i = eb; i < eb + ebcnt; i++) {
+ if (bad_ebs[i - eb])
+ continue;
+ if ((eb + erase_cycles) & 1)
+ patt = patt_5A5;
+ else
+ patt = patt_A5A;
+ err = write_pattern(i, patt);
+ if (err)
+ goto out;
+ cond_resched();
+ }
+
+ /* Verify what we wrote */
+ if (check) {
+ for (i = eb; i < eb + ebcnt; i++) {
+ if (bad_ebs[i - eb])
+ continue;
+ if ((eb + erase_cycles) & 1)
+ patt = patt_5A5;
+ else
+ patt = patt_A5A;
+ err = check_eraseblock(i, patt);
+ if (err) {
+ pr_info("verify failed for %s"
+ " pattern\n",
+ ((eb + erase_cycles) & 1) ?
+ "0x55AA55..." : "0xAA55AA...");
+ goto out;
+ }
+ cond_resched();
+ }
+ }
+
+ erase_cycles += 1;
+
+ if (erase_cycles % gran == 0) {
+ long ms;
+
+ stop_timing();
+ ms = (finish.tv_sec - start.tv_sec) * 1000 +
+ (finish.tv_usec - start.tv_usec) / 1000;
+ pr_info("%08u erase cycles done, took %lu "
+ "milliseconds (%lu seconds)\n",
+ erase_cycles, ms, ms / 1000);
+ start_timing();
+ }
+
+ if (!infinite && --cycles_count == 0)
+ break;
+ }
+out:
+
+ pr_info("finished after %u erase cycles\n",
+ erase_cycles);
+ kfree(bad_ebs);
+out_check_buf:
+ kfree(check_buf);
+out_patt_FF:
+ kfree(patt_FF);
+out_patt_A5A:
+ kfree(patt_A5A);
+out_patt_5A5:
+ kfree(patt_5A5);
+out_mtd:
+ put_mtd_device(mtd);
+ if (err)
+ pr_info("error %d occurred during torturing\n", err);
+ printk(KERN_INFO "=================================================\n");
+ return err;
+}
+module_init(tort_init);
+
+static void __exit tort_exit(void)
+{
+ return;
+}
+module_exit(tort_exit);
+
+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++;
+
+ pr_info("verify fails on %d pages, %d bytes/%d bits\n",
+ pages, bytes, bits);
+ pr_info("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");
+
+ pr_info("Page %zd 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");
projects / openwrt / staging / blogic.git / commitdiff