Merge branch 'master' of git://git.infradead.org/users/dedekind/mtd-tests-2.6
authorDavid Woodhouse <David.Woodhouse@intel.com>
Mon, 5 Jan 2009 16:24:55 +0000 (16:24 +0000)
committerDavid Woodhouse <David.Woodhouse@intel.com>
Mon, 5 Jan 2009 16:24:55 +0000 (16:24 +0000)
Conflicts:
drivers/mtd/Makefile

drivers/mtd/Kconfig
drivers/mtd/Makefile
drivers/mtd/tests/Makefile [new file with mode: 0644]
drivers/mtd/tests/mtd_oobtest.c [new file with mode: 0644]
drivers/mtd/tests/mtd_pagetest.c [new file with mode: 0644]
drivers/mtd/tests/mtd_readtest.c [new file with mode: 0644]
drivers/mtd/tests/mtd_speedtest.c [new file with mode: 0644]
drivers/mtd/tests/mtd_stresstest.c [new file with mode: 0644]
drivers/mtd/tests/mtd_subpagetest.c [new file with mode: 0644]
drivers/mtd/tests/mtd_torturetest.c [new file with mode: 0644]

index ad20dc3128b9a13b9f3e32b3bdc97ad8289b3358..7d04fb9ddcaae15a2ae260c73697d3a99b1106d1 100644 (file)
@@ -45,6 +45,14 @@ config MTD_PARTITIONS
          devices. Partitioning on NFTL 'devices' is a different - that's the
          'normal' form of partitioning used on a block device.
 
+config MTD_TESTS
+       tristate "MTD tests support"
+       depends on m
+       help
+         This option includes various MTD tests into compilation. The tests
+         should normally be compiled as kernel modules. The modules perform
+         various checks and verifications when loaded.
+
 config MTD_REDBOOT_PARTS
        tristate "RedBoot partition table parsing"
        depends on MTD_PARTITIONS
index 7fb3dfbb45793bc77649d3dd6ecb72cbcced4502..4521b1ecce452607987b3d32c6251264de02d2b8 100644 (file)
@@ -29,6 +29,6 @@ obj-$(CONFIG_MTD_OOPS)                += mtdoops.o
 nftl-objs              := nftlcore.o nftlmount.o
 inftl-objs             := inftlcore.o inftlmount.o
 
-obj-y          += chips/ lpddr/ maps/ devices/ nand/ onenand/ 
+obj-y          += chips/ lpddr/ maps/ devices/ nand/ onenand/ tests/
 
 obj-$(CONFIG_MTD_UBI)          += ubi/
diff --git a/drivers/mtd/tests/Makefile b/drivers/mtd/tests/Makefile
new file mode 100644 (file)
index 0000000..c1d5013
--- /dev/null
@@ -0,0 +1,7 @@
+obj-$(CONFIG_MTD_TESTS) += mtd_oobtest.o
+obj-$(CONFIG_MTD_TESTS) += mtd_pagetest.o
+obj-$(CONFIG_MTD_TESTS) += mtd_readtest.o
+obj-$(CONFIG_MTD_TESTS) += mtd_speedtest.o
+obj-$(CONFIG_MTD_TESTS) += mtd_stresstest.o
+obj-$(CONFIG_MTD_TESTS) += mtd_subpagetest.o
+obj-$(CONFIG_MTD_TESTS) += mtd_torturetest.o
diff --git a/drivers/mtd/tests/mtd_oobtest.c b/drivers/mtd/tests/mtd_oobtest.c
new file mode 100644 (file)
index 0000000..afbc3f8
--- /dev/null
@@ -0,0 +1,742 @@
+/*
+ * 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>
+ */
+
+#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/sched.h>
+
+#define PRINT_PREF KERN_INFO "mtd_oobtest: "
+
+static int dev;
+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 unsigned long next = 1;
+
+static inline unsigned int simple_rand(void)
+{
+       next = next * 1103515245 + 12345;
+       return (unsigned int)((next / 65536) % 32768);
+}
+
+static inline void simple_srand(unsigned long seed)
+{
+       next = seed;
+}
+
+static void set_random_data(unsigned char *buf, size_t len)
+{
+       size_t i;
+
+       for (i = 0; i < len; ++i)
+               buf[i] = simple_rand();
+}
+
+static int erase_eraseblock(int ebnum)
+{
+       int err;
+       struct erase_info ei;
+       loff_t addr = ebnum * mtd->erasesize;
+
+       memset(&ei, 0, sizeof(struct erase_info));
+       ei.mtd  = mtd;
+       ei.addr = addr;
+       ei.len  = mtd->erasesize;
+
+       err = mtd->erase(mtd, &ei);
+       if (err) {
+               printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
+               return err;
+       }
+
+       if (ei.state == MTD_ERASE_FAILED) {
+               printk(PRINT_PREF "some erase error occurred at EB %d\n",
+                      ebnum);
+               return -EIO;
+       }
+
+       return 0;
+}
+
+static int erase_whole_device(void)
+{
+       int err;
+       unsigned int i;
+
+       printk(PRINT_PREF "erasing whole device\n");
+       for (i = 0; i < ebcnt; ++i) {
+               if (bbt[i])
+                       continue;
+               err = erase_eraseblock(i);
+               if (err)
+                       return err;
+               cond_resched();
+       }
+       printk(PRINT_PREF "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) {
+               set_random_data(writebuf, use_len);
+               ops.mode      = MTD_OOB_AUTO;
+               ops.len       = 0;
+               ops.retlen    = 0;
+               ops.ooblen    = use_len;
+               ops.oobretlen = 0;
+               ops.ooboffs   = use_offset;
+               ops.datbuf    = 0;
+               ops.oobbuf    = writebuf;
+               err = mtd->write_oob(mtd, addr, &ops);
+               if (err || ops.oobretlen != use_len) {
+                       printk(PRINT_PREF "error: writeoob failed at %#llx\n",
+                              (long long)addr);
+                       printk(PRINT_PREF "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;
+
+       printk(PRINT_PREF "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)
+                       printk(PRINT_PREF "written up to eraseblock %u\n", i);
+               cond_resched();
+       }
+       printk(PRINT_PREF "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) {
+               set_random_data(writebuf, use_len);
+               ops.mode      = MTD_OOB_AUTO;
+               ops.len       = 0;
+               ops.retlen    = 0;
+               ops.ooblen    = use_len;
+               ops.oobretlen = 0;
+               ops.ooboffs   = use_offset;
+               ops.datbuf    = 0;
+               ops.oobbuf    = readbuf;
+               err = mtd->read_oob(mtd, addr, &ops);
+               if (err || ops.oobretlen != use_len) {
+                       printk(PRINT_PREF "error: readoob failed at %#llx\n",
+                              (long long)addr);
+                       errcnt += 1;
+                       return err ? err : -1;
+               }
+               if (memcmp(readbuf, writebuf, use_len)) {
+                       printk(PRINT_PREF "error: verify failed at %#llx\n",
+                              (long long)addr);
+                       errcnt += 1;
+                       if (errcnt > 1000) {
+                               printk(PRINT_PREF "error: too many errors\n");
+                               return -1;
+                       }
+               }
+               if (use_offset != 0 || use_len < mtd->ecclayout->oobavail) {
+                       int k;
+
+                       ops.mode      = MTD_OOB_AUTO;
+                       ops.len       = 0;
+                       ops.retlen    = 0;
+                       ops.ooblen    = mtd->ecclayout->oobavail;
+                       ops.oobretlen = 0;
+                       ops.ooboffs   = 0;
+                       ops.datbuf    = 0;
+                       ops.oobbuf    = readbuf;
+                       err = mtd->read_oob(mtd, addr, &ops);
+                       if (err || ops.oobretlen != mtd->ecclayout->oobavail) {
+                               printk(PRINT_PREF "error: readoob failed at "
+                                      "%#llx\n", (long long)addr);
+                               errcnt += 1;
+                               return err ? err : -1;
+                       }
+                       if (memcmp(readbuf + use_offset, writebuf, use_len)) {
+                               printk(PRINT_PREF "error: verify failed at "
+                                      "%#llx\n", (long long)addr);
+                               errcnt += 1;
+                               if (errcnt > 1000) {
+                                       printk(PRINT_PREF "error: too many "
+                                              "errors\n");
+                                       return -1;
+                               }
+                       }
+                       for (k = 0; k < use_offset; ++k)
+                               if (readbuf[k] != 0xff) {
+                                       printk(PRINT_PREF "error: verify 0xff "
+                                              "failed at %#llx\n",
+                                              (long long)addr);
+                                       errcnt += 1;
+                                       if (errcnt > 1000) {
+                                               printk(PRINT_PREF "error: too "
+                                                      "many errors\n");
+                                               return -1;
+                                       }
+                               }
+                       for (k = use_offset + use_len;
+                            k < mtd->ecclayout->oobavail; ++k)
+                               if (readbuf[k] != 0xff) {
+                                       printk(PRINT_PREF "error: verify 0xff "
+                                              "failed at %#llx\n",
+                                              (long long)addr);
+                                       errcnt += 1;
+                                       if (errcnt > 1000) {
+                                               printk(PRINT_PREF "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;
+
+       set_random_data(writebuf, len);
+       ops.mode      = MTD_OOB_AUTO;
+       ops.len       = 0;
+       ops.retlen    = 0;
+       ops.ooblen    = len;
+       ops.oobretlen = 0;
+       ops.ooboffs   = 0;
+       ops.datbuf    = 0;
+       ops.oobbuf    = readbuf;
+       err = mtd->read_oob(mtd, addr, &ops);
+       if (err || ops.oobretlen != len) {
+               printk(PRINT_PREF "error: readoob failed at %#llx\n",
+                      (long long)addr);
+               errcnt += 1;
+               return err ? err : -1;
+       }
+       if (memcmp(readbuf, writebuf, len)) {
+               printk(PRINT_PREF "error: verify failed at %#llx\n",
+                      (long long)addr);
+               errcnt += 1;
+               if (errcnt > 1000) {
+                       printk(PRINT_PREF "error: too many errors\n");
+                       return -1;
+               }
+       }
+
+       return err;
+}
+
+static int verify_all_eraseblocks(void)
+{
+       int err;
+       unsigned int i;
+
+       printk(PRINT_PREF "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)
+                       printk(PRINT_PREF "verified up to eraseblock %u\n", i);
+               cond_resched();
+       }
+       printk(PRINT_PREF "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)
+               printk(PRINT_PREF "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) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               return -ENOMEM;
+       }
+       memset(bbt, 0 , ebcnt);
+
+       printk(PRINT_PREF "scanning for bad eraseblocks\n");
+       for (i = 0; i < ebcnt; ++i) {
+               bbt[i] = is_block_bad(i) ? 1 : 0;
+               if (bbt[i])
+                       bad += 1;
+               cond_resched();
+       }
+       printk(PRINT_PREF "scanned %d eraseblocks, %d are bad\n", i, bad);
+       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");
+       printk(PRINT_PREF "MTD device: %d\n", dev);
+
+       mtd = get_mtd_device(NULL, dev);
+       if (IS_ERR(mtd)) {
+               err = PTR_ERR(mtd);
+               printk(PRINT_PREF "error: cannot get MTD device\n");
+               return err;
+       }
+
+       if (mtd->type != MTD_NANDFLASH) {
+               printk(PRINT_PREF "this test requires NAND flash\n");
+               goto out;
+       }
+
+       tmp = mtd->size;
+       do_div(tmp, mtd->erasesize);
+       ebcnt = tmp;
+       pgcnt = mtd->erasesize / mtd->writesize;
+
+       printk(PRINT_PREF "MTD device size %llu, eraseblock size %u, "
+              "page size %u, count of eraseblocks %u, pages per "
+              "eraseblock %u, OOB size %u\n",
+              (unsigned long long)mtd->size, mtd->erasesize,
+              mtd->writesize, ebcnt, pgcnt, mtd->oobsize);
+
+       err = -ENOMEM;
+       mtd->erasesize = mtd->erasesize;
+       readbuf = kmalloc(mtd->erasesize, GFP_KERNEL);
+       if (!readbuf) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               goto out;
+       }
+       writebuf = kmalloc(mtd->erasesize, GFP_KERNEL);
+       if (!writebuf) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               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 */
+       printk(PRINT_PREF "test 1 of 5\n");
+
+       err = erase_whole_device();
+       if (err)
+               goto out;
+
+       simple_srand(1);
+       err = write_whole_device();
+       if (err)
+               goto out;
+
+       simple_srand(1);
+       err = verify_all_eraseblocks();
+       if (err)
+               goto out;
+
+       /*
+        * Second test: write all OOB, a block at a time, read it back and
+        * verify.
+        */
+       printk(PRINT_PREF "test 2 of 5\n");
+
+       err = erase_whole_device();
+       if (err)
+               goto out;
+
+       simple_srand(3);
+       err = write_whole_device();
+       if (err)
+               goto out;
+
+       /* Check all eraseblocks */
+       simple_srand(3);
+       printk(PRINT_PREF "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)
+                       printk(PRINT_PREF "verified up to eraseblock %u\n", i);
+               cond_resched();
+       }
+       printk(PRINT_PREF "verified %u eraseblocks\n", i);
+
+       /*
+        * Third test: write OOB at varying offsets and lengths, read it back
+        * and verify.
+        */
+       printk(PRINT_PREF "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;
+       simple_srand(5);
+       printk(PRINT_PREF "writing OOBs of whole device\n");
+       for (i = 0; i < ebcnt; ++i) {
+               if (bbt[i])
+                       continue;
+               err = write_eraseblock(i);
+               if (err)
+                       goto out;
+               if (i % 256 == 0)
+                       printk(PRINT_PREF "written up to eraseblock %u\n", i);
+               cond_resched();
+       }
+       printk(PRINT_PREF "written %u eraseblocks\n", i);
+
+       /* Check all eraseblocks */
+       use_offset = 0;
+       use_len = mtd->ecclayout->oobavail;
+       use_len_max = mtd->ecclayout->oobavail;
+       vary_offset = 1;
+       simple_srand(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 */
+       printk(PRINT_PREF "test 4 of 5\n");
+
+       err = erase_whole_device();
+       if (err)
+               goto out;
+
+       addr0 = 0;
+       for (i = 0; bbt[i] && i < ebcnt; ++i)
+               addr0 += mtd->erasesize;
+
+       /* Attempt to write off end of OOB */
+       ops.mode      = MTD_OOB_AUTO;
+       ops.len       = 0;
+       ops.retlen    = 0;
+       ops.ooblen    = 1;
+       ops.oobretlen = 0;
+       ops.ooboffs   = mtd->ecclayout->oobavail;
+       ops.datbuf    = 0;
+       ops.oobbuf    = writebuf;
+       printk(PRINT_PREF "attempting to start write past end of OOB\n");
+       printk(PRINT_PREF "an error is expected...\n");
+       err = mtd->write_oob(mtd, addr0, &ops);
+       if (err) {
+               printk(PRINT_PREF "error occurred as expected\n");
+               err = 0;
+       } else {
+               printk(PRINT_PREF "error: can write past end of OOB\n");
+               errcnt += 1;
+       }
+
+       /* Attempt to read off end of OOB */
+       ops.mode      = MTD_OOB_AUTO;
+       ops.len       = 0;
+       ops.retlen    = 0;
+       ops.ooblen    = 1;
+       ops.oobretlen = 0;
+       ops.ooboffs   = mtd->ecclayout->oobavail;
+       ops.datbuf    = 0;
+       ops.oobbuf    = readbuf;
+       printk(PRINT_PREF "attempting to start read past end of OOB\n");
+       printk(PRINT_PREF "an error is expected...\n");
+       err = mtd->read_oob(mtd, addr0, &ops);
+       if (err) {
+               printk(PRINT_PREF "error occurred as expected\n");
+               err = 0;
+       } else {
+               printk(PRINT_PREF "error: can read past end of OOB\n");
+               errcnt += 1;
+       }
+
+       if (bbt[ebcnt - 1])
+               printk(PRINT_PREF "skipping end of device tests because last "
+                      "block is bad\n");
+       else {
+               /* Attempt to write off end of device */
+               ops.mode      = MTD_OOB_AUTO;
+               ops.len       = 0;
+               ops.retlen    = 0;
+               ops.ooblen    = mtd->ecclayout->oobavail + 1;
+               ops.oobretlen = 0;
+               ops.ooboffs   = 0;
+               ops.datbuf    = 0;
+               ops.oobbuf    = writebuf;
+               printk(PRINT_PREF "attempting to write past end of device\n");
+               printk(PRINT_PREF "an error is expected...\n");
+               err = mtd->write_oob(mtd, mtd->size - mtd->writesize, &ops);
+               if (err) {
+                       printk(PRINT_PREF "error occurred as expected\n");
+                       err = 0;
+               } else {
+                       printk(PRINT_PREF "error: wrote past end of device\n");
+                       errcnt += 1;
+               }
+
+               /* Attempt to read off end of device */
+               ops.mode      = MTD_OOB_AUTO;
+               ops.len       = 0;
+               ops.retlen    = 0;
+               ops.ooblen    = mtd->ecclayout->oobavail + 1;
+               ops.oobretlen = 0;
+               ops.ooboffs   = 0;
+               ops.datbuf    = 0;
+               ops.oobbuf    = readbuf;
+               printk(PRINT_PREF "attempting to read past end of device\n");
+               printk(PRINT_PREF "an error is expected...\n");
+               err = mtd->read_oob(mtd, mtd->size - mtd->writesize, &ops);
+               if (err) {
+                       printk(PRINT_PREF "error occurred as expected\n");
+                       err = 0;
+               } else {
+                       printk(PRINT_PREF "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_OOB_AUTO;
+               ops.len       = 0;
+               ops.retlen    = 0;
+               ops.ooblen    = mtd->ecclayout->oobavail;
+               ops.oobretlen = 0;
+               ops.ooboffs   = 1;
+               ops.datbuf    = 0;
+               ops.oobbuf    = writebuf;
+               printk(PRINT_PREF "attempting to write past end of device\n");
+               printk(PRINT_PREF "an error is expected...\n");
+               err = mtd->write_oob(mtd, mtd->size - mtd->writesize, &ops);
+               if (err) {
+                       printk(PRINT_PREF "error occurred as expected\n");
+                       err = 0;
+               } else {
+                       printk(PRINT_PREF "error: wrote past end of device\n");
+                       errcnt += 1;
+               }
+
+               /* Attempt to read off end of device */
+               ops.mode      = MTD_OOB_AUTO;
+               ops.len       = 0;
+               ops.retlen    = 0;
+               ops.ooblen    = mtd->ecclayout->oobavail;
+               ops.oobretlen = 0;
+               ops.ooboffs   = 1;
+               ops.datbuf    = 0;
+               ops.oobbuf    = readbuf;
+               printk(PRINT_PREF "attempting to read past end of device\n");
+               printk(PRINT_PREF "an error is expected...\n");
+               err = mtd->read_oob(mtd, mtd->size - mtd->writesize, &ops);
+               if (err) {
+                       printk(PRINT_PREF "error occurred as expected\n");
+                       err = 0;
+               } else {
+                       printk(PRINT_PREF "error: read past end of device\n");
+                       errcnt += 1;
+               }
+       }
+
+       /* Fifth test: write / read across block boundaries */
+       printk(PRINT_PREF "test 5 of 5\n");
+
+       /* Erase all eraseblocks */
+       err = erase_whole_device();
+       if (err)
+               goto out;
+
+       /* Write all eraseblocks */
+       simple_srand(11);
+       printk(PRINT_PREF "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) {
+                       set_random_data(writebuf, sz);
+                       ops.mode      = MTD_OOB_AUTO;
+                       ops.len       = 0;
+                       ops.retlen    = 0;
+                       ops.ooblen    = sz;
+                       ops.oobretlen = 0;
+                       ops.ooboffs   = 0;
+                       ops.datbuf    = 0;
+                       ops.oobbuf    = writebuf;
+                       err = mtd->write_oob(mtd, addr, &ops);
+                       if (err)
+                               goto out;
+                       if (i % 256 == 0)
+                               printk(PRINT_PREF "written up to eraseblock "
+                                      "%u\n", i);
+                       cond_resched();
+                       addr += mtd->writesize;
+               }
+       }
+       printk(PRINT_PREF "written %u eraseblocks\n", i);
+
+       /* Check all eraseblocks */
+       simple_srand(11);
+       printk(PRINT_PREF "verifying all eraseblocks\n");
+       for (i = 0; i < ebcnt - 1; ++i) {
+               if (bbt[i] || bbt[i + 1])
+                       continue;
+               set_random_data(writebuf, mtd->ecclayout->oobavail * 2);
+               addr = (i + 1) * mtd->erasesize - mtd->writesize;
+               ops.mode      = MTD_OOB_AUTO;
+               ops.len       = 0;
+               ops.retlen    = 0;
+               ops.ooblen    = mtd->ecclayout->oobavail * 2;
+               ops.oobretlen = 0;
+               ops.ooboffs   = 0;
+               ops.datbuf    = 0;
+               ops.oobbuf    = readbuf;
+               err = mtd->read_oob(mtd, addr, &ops);
+               if (err)
+                       goto out;
+               if (memcmp(readbuf, writebuf, mtd->ecclayout->oobavail * 2)) {
+                       printk(PRINT_PREF "error: verify failed at %#llx\n",
+                              (long long)addr);
+                       errcnt += 1;
+                       if (errcnt > 1000) {
+                               printk(PRINT_PREF "error: too many errors\n");
+                               goto out;
+                       }
+               }
+               if (i % 256 == 0)
+                       printk(PRINT_PREF "verified up to eraseblock %u\n", i);
+               cond_resched();
+       }
+       printk(PRINT_PREF "verified %u eraseblocks\n", i);
+
+       printk(PRINT_PREF "finished with %d errors\n", errcnt);
+out:
+       kfree(bbt);
+       kfree(writebuf);
+       kfree(readbuf);
+       put_mtd_device(mtd);
+       if (err)
+               printk(PRINT_PREF "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");
diff --git a/drivers/mtd/tests/mtd_pagetest.c b/drivers/mtd/tests/mtd_pagetest.c
new file mode 100644 (file)
index 0000000..9648818
--- /dev/null
@@ -0,0 +1,632 @@
+/*
+ * 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>
+ */
+
+#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/sched.h>
+
+#define PRINT_PREF KERN_INFO "mtd_pagetest: "
+
+static int dev;
+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 unsigned long next = 1;
+
+static inline unsigned int simple_rand(void)
+{
+       next = next * 1103515245 + 12345;
+       return (unsigned int)((next / 65536) % 32768);
+}
+
+static inline void simple_srand(unsigned long seed)
+{
+       next = seed;
+}
+
+static void set_random_data(unsigned char *buf, size_t len)
+{
+       size_t i;
+
+       for (i = 0; i < len; ++i)
+               buf[i] = simple_rand();
+}
+
+static int erase_eraseblock(int ebnum)
+{
+       int err;
+       struct erase_info ei;
+       loff_t addr = ebnum * mtd->erasesize;
+
+       memset(&ei, 0, sizeof(struct erase_info));
+       ei.mtd  = mtd;
+       ei.addr = addr;
+       ei.len  = mtd->erasesize;
+
+       err = mtd->erase(mtd, &ei);
+       if (err) {
+               printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
+               return err;
+       }
+
+       if (ei.state == MTD_ERASE_FAILED) {
+               printk(PRINT_PREF "some erase error occurred at EB %d\n",
+                      ebnum);
+               return -EIO;
+       }
+
+       return 0;
+}
+
+static int write_eraseblock(int ebnum)
+{
+       int err = 0;
+       size_t written = 0;
+       loff_t addr = ebnum * mtd->erasesize;
+
+       set_random_data(writebuf, mtd->erasesize);
+       cond_resched();
+       err = mtd->write(mtd, addr, mtd->erasesize, &written, writebuf);
+       if (err || written != mtd->erasesize)
+               printk(PRINT_PREF "error: write failed at %#llx\n",
+                      (long long)addr);
+
+       return err;
+}
+
+static int verify_eraseblock(int ebnum)
+{
+       uint32_t j;
+       size_t read = 0;
+       int err = 0, i;
+       loff_t addr0, addrn;
+       loff_t addr = ebnum * mtd->erasesize;
+
+       addr0 = 0;
+       for (i = 0; bbt[i] && i < ebcnt; ++i)
+               addr0 += mtd->erasesize;
+
+       addrn = mtd->size;
+       for (i = 0; bbt[ebcnt - i - 1] && i < ebcnt; ++i)
+               addrn -= mtd->erasesize;
+
+       set_random_data(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 (err == -EUCLEAN)
+                       err = 0;
+               if (err || read != bufsize) {
+                       printk(PRINT_PREF "error: read failed at %#llx\n",
+                              (long long)addr0);
+                       return err;
+               }
+               err = mtd->read(mtd, addrn - bufsize, bufsize, &read, twopages);
+               if (err == -EUCLEAN)
+                       err = 0;
+               if (err || read != bufsize) {
+                       printk(PRINT_PREF "error: read failed at %#llx\n",
+                              (long long)(addrn - bufsize));
+                       return err;
+               }
+               memset(twopages, 0, bufsize);
+               read = 0;
+               err = mtd->read(mtd, addr, bufsize, &read, twopages);
+               if (err == -EUCLEAN)
+                       err = 0;
+               if (err || read != bufsize) {
+                       printk(PRINT_PREF "error: read failed at %#llx\n",
+                              (long long)addr);
+                       break;
+               }
+               if (memcmp(twopages, writebuf + (j * pgsize), bufsize)) {
+                       printk(PRINT_PREF "error: verify failed at %#llx\n",
+                              (long long)addr);
+                       errcnt += 1;
+               }
+       }
+       /* Check boundary between eraseblocks */
+       if (addr <= addrn - pgsize - pgsize && !bbt[ebnum + 1]) {
+               unsigned long oldnext = next;
+               /* Do a read to set the internal dataRAMs to different data */
+               err = mtd->read(mtd, addr0, bufsize, &read, twopages);
+               if (err == -EUCLEAN)
+                       err = 0;
+               if (err || read != bufsize) {
+                       printk(PRINT_PREF "error: read failed at %#llx\n",
+                              (long long)addr0);
+                       return err;
+               }
+               err = mtd->read(mtd, addrn - bufsize, bufsize, &read, twopages);
+               if (err == -EUCLEAN)
+                       err = 0;
+               if (err || read != bufsize) {
+                       printk(PRINT_PREF "error: read failed at %#llx\n",
+                              (long long)(addrn - bufsize));
+                       return err;
+               }
+               memset(twopages, 0, bufsize);
+               read = 0;
+               err = mtd->read(mtd, addr, bufsize, &read, twopages);
+               if (err == -EUCLEAN)
+                       err = 0;
+               if (err || read != bufsize) {
+                       printk(PRINT_PREF "error: read failed at %#llx\n",
+                              (long long)addr);
+                       return err;
+               }
+               memcpy(boundary, writebuf + mtd->erasesize - pgsize, pgsize);
+               set_random_data(boundary + pgsize, pgsize);
+               if (memcmp(twopages, boundary, bufsize)) {
+                       printk(PRINT_PREF "error: verify failed at %#llx\n",
+                              (long long)addr);
+                       errcnt += 1;
+               }
+               next = oldnext;
+       }
+       return err;
+}
+
+static int crosstest(void)
+{
+       size_t read = 0;
+       int err = 0, i;
+       loff_t addr, addr0, addrn;
+       unsigned char *pp1, *pp2, *pp3, *pp4;
+
+       printk(PRINT_PREF "crosstest\n");
+       pp1 = kmalloc(pgsize * 4, GFP_KERNEL);
+       if (!pp1) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               return -ENOMEM;
+       }
+       pp2 = pp1 + pgsize;
+       pp3 = pp2 + pgsize;
+       pp4 = pp3 + pgsize;
+       memset(pp1, 0, pgsize * 4);
+
+       addr0 = 0;
+       for (i = 0; bbt[i] && i < ebcnt; ++i)
+               addr0 += mtd->erasesize;
+
+       addrn = mtd->size;
+       for (i = 0; bbt[ebcnt - i - 1] && i < ebcnt; ++i)
+               addrn -= mtd->erasesize;
+
+       /* Read 2nd-to-last page to pp1 */
+       read = 0;
+       addr = addrn - pgsize - pgsize;
+       err = mtd->read(mtd, addr, pgsize, &read, pp1);
+       if (err == -EUCLEAN)
+               err = 0;
+       if (err || read != pgsize) {
+               printk(PRINT_PREF "error: read failed at %#llx\n",
+                      (long long)addr);
+               kfree(pp1);
+               return err;
+       }
+
+       /* Read 3rd-to-last page to pp1 */
+       read = 0;
+       addr = addrn - pgsize - pgsize - pgsize;
+       err = mtd->read(mtd, addr, pgsize, &read, pp1);
+       if (err == -EUCLEAN)
+               err = 0;
+       if (err || read != pgsize) {
+               printk(PRINT_PREF "error: read failed at %#llx\n",
+                      (long long)addr);
+               kfree(pp1);
+               return err;
+       }
+
+       /* Read first page to pp2 */
+       read = 0;
+       addr = addr0;
+       printk(PRINT_PREF "reading page at %#llx\n", (long long)addr);
+       err = mtd->read(mtd, addr, pgsize, &read, pp2);
+       if (err == -EUCLEAN)
+               err = 0;
+       if (err || read != pgsize) {
+               printk(PRINT_PREF "error: read failed at %#llx\n",
+                      (long long)addr);
+               kfree(pp1);
+               return err;
+       }
+
+       /* Read last page to pp3 */
+       read = 0;
+       addr = addrn - pgsize;
+       printk(PRINT_PREF "reading page at %#llx\n", (long long)addr);
+       err = mtd->read(mtd, addr, pgsize, &read, pp3);
+       if (err == -EUCLEAN)
+               err = 0;
+       if (err || read != pgsize) {
+               printk(PRINT_PREF "error: read failed at %#llx\n",
+                      (long long)addr);
+               kfree(pp1);
+               return err;
+       }
+
+       /* Read first page again to pp4 */
+       read = 0;
+       addr = addr0;
+       printk(PRINT_PREF "reading page at %#llx\n", (long long)addr);
+       err = mtd->read(mtd, addr, pgsize, &read, pp4);
+       if (err == -EUCLEAN)
+               err = 0;
+       if (err || read != pgsize) {
+               printk(PRINT_PREF "error: read failed at %#llx\n",
+                      (long long)addr);
+               kfree(pp1);
+               return err;
+       }
+
+       /* pp2 and pp4 should be the same */
+       printk(PRINT_PREF "verifying pages read at %#llx match\n",
+              (long long)addr0);
+       if (memcmp(pp2, pp4, pgsize)) {
+               printk(PRINT_PREF "verify failed!\n");
+               errcnt += 1;
+       } else if (!err)
+               printk(PRINT_PREF "crosstest ok\n");
+       kfree(pp1);
+       return err;
+}
+
+static int erasecrosstest(void)
+{
+       size_t read = 0, written = 0;
+       int err = 0, i, ebnum, ok = 1, ebnum2;
+       loff_t addr0;
+       char *readbuf = twopages;
+
+       printk(PRINT_PREF "erasecrosstest\n");
+
+       ebnum = 0;
+       addr0 = 0;
+       for (i = 0; bbt[i] && i < ebcnt; ++i) {
+               addr0 += mtd->erasesize;
+               ebnum += 1;
+       }
+
+       ebnum2 = ebcnt - 1;
+       while (ebnum2 && bbt[ebnum2])
+               ebnum2 -= 1;
+
+       printk(PRINT_PREF "erasing block %d\n", ebnum);
+       err = erase_eraseblock(ebnum);
+       if (err)
+               return err;
+
+       printk(PRINT_PREF "writing 1st page of block %d\n", ebnum);
+       set_random_data(writebuf, pgsize);
+       strcpy(writebuf, "There is no data like this!");
+       err = mtd->write(mtd, addr0, pgsize, &written, writebuf);
+       if (err || written != pgsize) {
+               printk(PRINT_PREF "error: write failed at %#llx\n",
+                      (long long)addr0);
+               return err ? err : -1;
+       }
+
+       printk(PRINT_PREF "reading 1st page of block %d\n", ebnum);
+       memset(readbuf, 0, pgsize);
+       err = mtd->read(mtd, addr0, pgsize, &read, readbuf);
+       if (err == -EUCLEAN)
+               err = 0;
+       if (err || read != pgsize) {
+               printk(PRINT_PREF "error: read failed at %#llx\n",
+                      (long long)addr0);
+               return err ? err : -1;
+       }
+
+       printk(PRINT_PREF "verifying 1st page of block %d\n", ebnum);
+       if (memcmp(writebuf, readbuf, pgsize)) {
+               printk(PRINT_PREF "verify failed!\n");
+               errcnt += 1;
+               ok = 0;
+               return err;
+       }
+
+       printk(PRINT_PREF "erasing block %d\n", ebnum);
+       err = erase_eraseblock(ebnum);
+       if (err)
+               return err;
+
+       printk(PRINT_PREF "writing 1st page of block %d\n", ebnum);
+       set_random_data(writebuf, pgsize);
+       strcpy(writebuf, "There is no data like this!");
+       err = mtd->write(mtd, addr0, pgsize, &written, writebuf);
+       if (err || written != pgsize) {
+               printk(PRINT_PREF "error: write failed at %#llx\n",
+                      (long long)addr0);
+               return err ? err : -1;
+       }
+
+       printk(PRINT_PREF "erasing block %d\n", ebnum2);
+       err = erase_eraseblock(ebnum2);
+       if (err)
+               return err;
+
+       printk(PRINT_PREF "reading 1st page of block %d\n", ebnum);
+       memset(readbuf, 0, pgsize);
+       err = mtd->read(mtd, addr0, pgsize, &read, readbuf);
+       if (err == -EUCLEAN)
+               err = 0;
+       if (err || read != pgsize) {
+               printk(PRINT_PREF "error: read failed at %#llx\n",
+                      (long long)addr0);
+               return err ? err : -1;
+       }
+
+       printk(PRINT_PREF "verifying 1st page of block %d\n", ebnum);
+       if (memcmp(writebuf, readbuf, pgsize)) {
+               printk(PRINT_PREF "verify failed!\n");
+               errcnt += 1;
+               ok = 0;
+       }
+
+       if (ok && !err)
+               printk(PRINT_PREF "erasecrosstest ok\n");
+       return err;
+}
+
+static int erasetest(void)
+{
+       size_t read = 0, written = 0;
+       int err = 0, i, ebnum, ok = 1;
+       loff_t addr0;
+
+       printk(PRINT_PREF "erasetest\n");
+
+       ebnum = 0;
+       addr0 = 0;
+       for (i = 0; bbt[i] && i < ebcnt; ++i) {
+               addr0 += mtd->erasesize;
+               ebnum += 1;
+       }
+
+       printk(PRINT_PREF "erasing block %d\n", ebnum);
+       err = erase_eraseblock(ebnum);
+       if (err)
+               return err;
+
+       printk(PRINT_PREF "writing 1st page of block %d\n", ebnum);
+       set_random_data(writebuf, pgsize);
+       err = mtd->write(mtd, addr0, pgsize, &written, writebuf);
+       if (err || written != pgsize) {
+               printk(PRINT_PREF "error: write failed at %#llx\n",
+                      (long long)addr0);
+               return err ? err : -1;
+       }
+
+       printk(PRINT_PREF "erasing block %d\n", ebnum);
+       err = erase_eraseblock(ebnum);
+       if (err)
+               return err;
+
+       printk(PRINT_PREF "reading 1st page of block %d\n", ebnum);
+       err = mtd->read(mtd, addr0, pgsize, &read, twopages);
+       if (err == -EUCLEAN)
+               err = 0;
+       if (err || read != pgsize) {
+               printk(PRINT_PREF "error: read failed at %#llx\n",
+                      (long long)addr0);
+               return err ? err : -1;
+       }
+
+       printk(PRINT_PREF "verifying 1st page of block %d is all 0xff\n",
+              ebnum);
+       for (i = 0; i < pgsize; ++i)
+               if (twopages[i] != 0xff) {
+                       printk(PRINT_PREF "verifying all 0xff failed at %d\n",
+                              i);
+                       errcnt += 1;
+                       ok = 0;
+                       break;
+               }
+
+       if (ok && !err)
+               printk(PRINT_PREF "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)
+               printk(PRINT_PREF "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) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               return -ENOMEM;
+       }
+       memset(bbt, 0 , ebcnt);
+
+       printk(PRINT_PREF "scanning for bad eraseblocks\n");
+       for (i = 0; i < ebcnt; ++i) {
+               bbt[i] = is_block_bad(i) ? 1 : 0;
+               if (bbt[i])
+                       bad += 1;
+               cond_resched();
+       }
+       printk(PRINT_PREF "scanned %d eraseblocks, %d are bad\n", i, bad);
+       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");
+       printk(PRINT_PREF "MTD device: %d\n", dev);
+
+       mtd = get_mtd_device(NULL, dev);
+       if (IS_ERR(mtd)) {
+               err = PTR_ERR(mtd);
+               printk(PRINT_PREF "error: cannot get MTD device\n");
+               return err;
+       }
+
+       if (mtd->type != MTD_NANDFLASH) {
+               printk(PRINT_PREF "this test requires NAND flash\n");
+               goto out;
+       }
+
+       tmp = mtd->size;
+       do_div(tmp, mtd->erasesize);
+       ebcnt = tmp;
+       pgcnt = mtd->erasesize / mtd->writesize;
+
+       printk(PRINT_PREF "MTD device size %llu, eraseblock size %u, "
+              "page size %u, count of eraseblocks %u, pages per "
+              "eraseblock %u, OOB size %u\n",
+              (unsigned long long)mtd->size, mtd->erasesize,
+              pgsize, ebcnt, pgcnt, mtd->oobsize);
+
+       err = -ENOMEM;
+       bufsize = pgsize * 2;
+       writebuf = kmalloc(mtd->erasesize, GFP_KERNEL);
+       if (!writebuf) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               goto out;
+       }
+       twopages = kmalloc(bufsize, GFP_KERNEL);
+       if (!twopages) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               goto out;
+       }
+       boundary = kmalloc(bufsize, GFP_KERNEL);
+       if (!boundary) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               goto out;
+       }
+
+       err = scan_for_bad_eraseblocks();
+       if (err)
+               goto out;
+
+       /* Erase all eraseblocks */
+       printk(PRINT_PREF "erasing whole device\n");
+       for (i = 0; i < ebcnt; ++i) {
+               if (bbt[i])
+                       continue;
+               err = erase_eraseblock(i);
+               if (err)
+                       goto out;
+               cond_resched();
+       }
+       printk(PRINT_PREF "erased %u eraseblocks\n", i);
+
+       /* Write all eraseblocks */
+       simple_srand(1);
+       printk(PRINT_PREF "writing whole device\n");
+       for (i = 0; i < ebcnt; ++i) {
+               if (bbt[i])
+                       continue;
+               err = write_eraseblock(i);
+               if (err)
+                       goto out;
+               if (i % 256 == 0)
+                       printk(PRINT_PREF "written up to eraseblock %u\n", i);
+               cond_resched();
+       }
+       printk(PRINT_PREF "written %u eraseblocks\n", i);
+
+       /* Check all eraseblocks */
+       simple_srand(1);
+       printk(PRINT_PREF "verifying all eraseblocks\n");
+       for (i = 0; i < ebcnt; ++i) {
+               if (bbt[i])
+                       continue;
+               err = verify_eraseblock(i);
+               if (err)
+                       goto out;
+               if (i % 256 == 0)
+                       printk(PRINT_PREF "verified up to eraseblock %u\n", i);
+               cond_resched();
+       }
+       printk(PRINT_PREF "verified %u eraseblocks\n", i);
+
+       err = crosstest();
+       if (err)
+               goto out;
+
+       err = erasecrosstest();
+       if (err)
+               goto out;
+
+       err = erasetest();
+       if (err)
+               goto out;
+
+       printk(PRINT_PREF "finished with %d errors\n", errcnt);
+out:
+
+       kfree(bbt);
+       kfree(boundary);
+       kfree(twopages);
+       kfree(writebuf);
+       put_mtd_device(mtd);
+       if (err)
+               printk(PRINT_PREF "error %d occurred\n", err);
+       printk(KERN_INFO "=================================================\n");
+       return err;
+}
+module_init(mtd_pagetest_init);
+
+static void __exit mtd_pagetest_exit(void)
+{
+       return;
+}
+module_exit(mtd_pagetest_exit);
+
+MODULE_DESCRIPTION("NAND page test");
+MODULE_AUTHOR("Adrian Hunter");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mtd/tests/mtd_readtest.c b/drivers/mtd/tests/mtd_readtest.c
new file mode 100644 (file)
index 0000000..645e77f
--- /dev/null
@@ -0,0 +1,253 @@
+/*
+ * 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>
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/err.h>
+#include <linux/mtd/mtd.h>
+#include <linux/sched.h>
+
+#define PRINT_PREF KERN_INFO "mtd_readtest: "
+
+static int dev;
+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 = 0;
+       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 , pgcnt);
+               ret = mtd->read(mtd, addr, pgsize, &read, buf);
+               if (ret == -EUCLEAN)
+                       ret = 0;
+               if (ret || read != pgsize) {
+                       printk(PRINT_PREF "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_OOB_PLACE;
+                       ops.len       = 0;
+                       ops.retlen    = 0;
+                       ops.ooblen    = mtd->oobsize;
+                       ops.oobretlen = 0;
+                       ops.ooboffs   = 0;
+                       ops.datbuf    = 0;
+                       ops.oobbuf    = oobbuf;
+                       ret = mtd->read_oob(mtd, addr, &ops);
+                       if (ret || ops.oobretlen != mtd->oobsize) {
+                               printk(PRINT_PREF "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;
+
+       printk(PRINT_PREF "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;
+       printk(PRINT_PREF "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)
+               printk(PRINT_PREF "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) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               return -ENOMEM;
+       }
+       memset(bbt, 0 , ebcnt);
+
+       printk(PRINT_PREF "scanning for bad eraseblocks\n");
+       for (i = 0; i < ebcnt; ++i) {
+               bbt[i] = is_block_bad(i) ? 1 : 0;
+               if (bbt[i])
+                       bad += 1;
+               cond_resched();
+       }
+       printk(PRINT_PREF "scanned %d eraseblocks, %d are bad\n", i, bad);
+       return 0;
+}
+
+static int __init mtd_readtest_init(void)
+{
+       uint64_t tmp;
+       int err, i;
+
+       printk(KERN_INFO "\n");
+       printk(KERN_INFO "=================================================\n");
+       printk(PRINT_PREF "MTD device: %d\n", dev);
+
+       mtd = get_mtd_device(NULL, dev);
+       if (IS_ERR(mtd)) {
+               err = PTR_ERR(mtd);
+               printk(PRINT_PREF "error: Cannot get MTD device\n");
+               return err;
+       }
+
+       if (mtd->writesize == 1) {
+               printk(PRINT_PREF "not NAND flash, assume page size is 512 "
+                      "bytes.\n");
+               pgsize = 512;
+       } else
+               pgsize = mtd->writesize;
+
+       tmp = mtd->size;
+       do_div(tmp, mtd->erasesize);
+       ebcnt = tmp;
+       pgcnt = mtd->erasesize / mtd->writesize;
+
+       printk(PRINT_PREF "MTD device size %llu, eraseblock size %u, "
+              "page size %u, count of eraseblocks %u, pages per "
+              "eraseblock %u, OOB size %u\n",
+              (unsigned long long)mtd->size, mtd->erasesize,
+              pgsize, ebcnt, pgcnt, mtd->oobsize);
+
+       err = -ENOMEM;
+       iobuf = kmalloc(mtd->erasesize, GFP_KERNEL);
+       if (!iobuf) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               goto out;
+       }
+       iobuf1 = kmalloc(mtd->erasesize, GFP_KERNEL);
+       if (!iobuf1) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               goto out;
+       }
+
+       err = scan_for_bad_eraseblocks();
+       if (err)
+               goto out;
+
+       /* Read all eraseblocks 1 page at a time */
+       printk(PRINT_PREF "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)
+               printk(PRINT_PREF "finished with errors\n");
+       else
+               printk(PRINT_PREF "finished\n");
+
+out:
+
+       kfree(iobuf);
+       kfree(iobuf1);
+       kfree(bbt);
+       put_mtd_device(mtd);
+       if (err)
+               printk(PRINT_PREF "error %d occurred\n", err);
+       printk(KERN_INFO "=================================================\n");
+       return err;
+}
+module_init(mtd_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");
diff --git a/drivers/mtd/tests/mtd_speedtest.c b/drivers/mtd/tests/mtd_speedtest.c
new file mode 100644 (file)
index 0000000..141363a
--- /dev/null
@@ -0,0 +1,502 @@
+/*
+ * 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 <ext-adrian.hunter@nokia.com>
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/err.h>
+#include <linux/mtd/mtd.h>
+#include <linux/sched.h>
+
+#define PRINT_PREF KERN_INFO "mtd_speedtest: "
+
+static int dev;
+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 *bbt;
+
+static int pgsize;
+static int ebcnt;
+static int pgcnt;
+static int goodebcnt;
+static struct timeval start, finish;
+static unsigned long next = 1;
+
+static inline unsigned int simple_rand(void)
+{
+       next = next * 1103515245 + 12345;
+       return (unsigned int)((next / 65536) % 32768);
+}
+
+static inline void simple_srand(unsigned long seed)
+{
+       next = seed;
+}
+
+static void set_random_data(unsigned char *buf, size_t len)
+{
+       size_t i;
+
+       for (i = 0; i < len; ++i)
+               buf[i] = simple_rand();
+}
+
+static int erase_eraseblock(int ebnum)
+{
+       int err;
+       struct erase_info ei;
+       loff_t addr = ebnum * mtd->erasesize;
+
+       memset(&ei, 0, sizeof(struct erase_info));
+       ei.mtd  = mtd;
+       ei.addr = addr;
+       ei.len  = mtd->erasesize;
+
+       err = mtd->erase(mtd, &ei);
+       if (err) {
+               printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
+               return err;
+       }
+
+       if (ei.state == MTD_ERASE_FAILED) {
+               printk(PRINT_PREF "some erase error occurred at EB %d\n",
+                      ebnum);
+               return -EIO;
+       }
+
+       return 0;
+}
+
+static int erase_whole_device(void)
+{
+       int err;
+       unsigned int i;
+
+       for (i = 0; i < ebcnt; ++i) {
+               if (bbt[i])
+                       continue;
+               err = erase_eraseblock(i);
+               if (err)
+                       return err;
+               cond_resched();
+       }
+       return 0;
+}
+
+static int write_eraseblock(int ebnum)
+{
+       size_t written = 0;
+       int err = 0;
+       loff_t addr = ebnum * mtd->erasesize;
+
+       err = mtd->write(mtd, addr, mtd->erasesize, &written, iobuf);
+       if (err || written != mtd->erasesize) {
+               printk(PRINT_PREF "error: write failed at %#llx\n", addr);
+               if (!err)
+                       err = -EINVAL;
+       }
+
+       return err;
+}
+
+static int write_eraseblock_by_page(int ebnum)
+{
+       size_t written = 0;
+       int i, err = 0;
+       loff_t addr = ebnum * mtd->erasesize;
+       void *buf = iobuf;
+
+       for (i = 0; i < pgcnt; i++) {
+               err = mtd->write(mtd, addr, pgsize, &written, buf);
+               if (err || written != pgsize) {
+                       printk(PRINT_PREF "error: write failed at %#llx\n",
+                              addr);
+                       if (!err)
+                               err = -EINVAL;
+                       break;
+               }
+               addr += pgsize;
+               buf += pgsize;
+       }
+
+       return err;
+}
+
+static int write_eraseblock_by_2pages(int ebnum)
+{
+       size_t written = 0, sz = pgsize * 2;
+       int i, n = pgcnt / 2, err = 0;
+       loff_t addr = ebnum * mtd->erasesize;
+       void *buf = iobuf;
+
+       for (i = 0; i < n; i++) {
+               err = mtd->write(mtd, addr, sz, &written, buf);
+               if (err || written != sz) {
+                       printk(PRINT_PREF "error: write failed at %#llx\n",
+                              addr);
+                       if (!err)
+                               err = -EINVAL;
+                       return err;
+               }
+               addr += sz;
+               buf += sz;
+       }
+       if (pgcnt % 2) {
+               err = mtd->write(mtd, addr, pgsize, &written, buf);
+               if (err || written != pgsize) {
+                       printk(PRINT_PREF "error: write failed at %#llx\n",
+                              addr);
+                       if (!err)
+                               err = -EINVAL;
+               }
+       }
+
+       return err;
+}
+
+static int read_eraseblock(int ebnum)
+{
+       size_t read = 0;
+       int err = 0;
+       loff_t addr = ebnum * mtd->erasesize;
+
+       err = mtd->read(mtd, addr, mtd->erasesize, &read, iobuf);
+       /* Ignore corrected ECC errors */
+       if (err == -EUCLEAN)
+               err = 0;
+       if (err || read != mtd->erasesize) {
+               printk(PRINT_PREF "error: read failed at %#llx\n", addr);
+               if (!err)
+                       err = -EINVAL;
+       }
+
+       return err;
+}
+
+static int read_eraseblock_by_page(int ebnum)
+{
+       size_t read = 0;
+       int i, err = 0;
+       loff_t addr = ebnum * mtd->erasesize;
+       void *buf = iobuf;
+
+       for (i = 0; i < pgcnt; i++) {
+               err = mtd->read(mtd, addr, pgsize, &read, buf);
+               /* Ignore corrected ECC errors */
+               if (err == -EUCLEAN)
+                       err = 0;
+               if (err || read != pgsize) {
+                       printk(PRINT_PREF "error: read failed at %#llx\n",
+                              addr);
+                       if (!err)
+                               err = -EINVAL;
+                       break;
+               }
+               addr += pgsize;
+               buf += pgsize;
+       }
+
+       return err;
+}
+
+static int read_eraseblock_by_2pages(int ebnum)
+{
+       size_t read = 0, sz = pgsize * 2;
+       int i, n = pgcnt / 2, err = 0;
+       loff_t addr = ebnum * mtd->erasesize;
+       void *buf = iobuf;
+
+       for (i = 0; i < n; i++) {
+               err = mtd->read(mtd, addr, sz, &read, buf);
+               /* Ignore corrected ECC errors */
+               if (err == -EUCLEAN)
+                       err = 0;
+               if (err || read != sz) {
+                       printk(PRINT_PREF "error: read failed at %#llx\n",
+                              addr);
+                       if (!err)
+                               err = -EINVAL;
+                       return err;
+               }
+               addr += sz;
+               buf += sz;
+       }
+       if (pgcnt % 2) {
+               err = mtd->read(mtd, addr, pgsize, &read, buf);
+               /* Ignore corrected ECC errors */
+               if (err == -EUCLEAN)
+                       err = 0;
+               if (err || read != pgsize) {
+                       printk(PRINT_PREF "error: read failed at %#llx\n",
+                              addr);
+                       if (!err)
+                               err = -EINVAL;
+               }
+       }
+
+       return err;
+}
+
+static int is_block_bad(int ebnum)
+{
+       loff_t addr = ebnum * mtd->erasesize;
+       int ret;
+
+       ret = mtd->block_isbad(mtd, addr);
+       if (ret)
+               printk(PRINT_PREF "block %d is bad\n", ebnum);
+       return ret;
+}
+
+static inline void start_timing(void)
+{
+       do_gettimeofday(&start);
+}
+
+static inline void stop_timing(void)
+{
+       do_gettimeofday(&finish);
+}
+
+static long calc_speed(void)
+{
+       long ms, k, speed;
+
+       ms = (finish.tv_sec - start.tv_sec) * 1000 +
+            (finish.tv_usec - start.tv_usec) / 1000;
+       k = goodebcnt * mtd->erasesize / 1024;
+       speed = (k * 1000) / ms;
+       return speed;
+}
+
+static int scan_for_bad_eraseblocks(void)
+{
+       int i, bad = 0;
+
+       bbt = kmalloc(ebcnt, GFP_KERNEL);
+       if (!bbt) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               return -ENOMEM;
+       }
+       memset(bbt, 0 , ebcnt);
+
+       printk(PRINT_PREF "scanning for bad eraseblocks\n");
+       for (i = 0; i < ebcnt; ++i) {
+               bbt[i] = is_block_bad(i) ? 1 : 0;
+               if (bbt[i])
+                       bad += 1;
+               cond_resched();
+       }
+       printk(PRINT_PREF "scanned %d eraseblocks, %d are bad\n", i, bad);
+       goodebcnt = ebcnt - bad;
+       return 0;
+}
+
+static int __init mtd_speedtest_init(void)
+{
+       int err, i;
+       long speed;
+       uint64_t tmp;
+
+       printk(KERN_INFO "\n");
+       printk(KERN_INFO "=================================================\n");
+       printk(PRINT_PREF "MTD device: %d\n", dev);
+
+       mtd = get_mtd_device(NULL, dev);
+       if (IS_ERR(mtd)) {
+               err = PTR_ERR(mtd);
+               printk(PRINT_PREF "error: cannot get MTD device\n");
+               return err;
+       }
+
+       if (mtd->writesize == 1) {
+               printk(PRINT_PREF "not NAND flash, assume page size is 512 "
+                      "bytes.\n");
+               pgsize = 512;
+       } else
+               pgsize = mtd->writesize;
+
+       tmp = mtd->size;
+       do_div(tmp, mtd->erasesize);
+       ebcnt = tmp;
+       pgcnt = mtd->erasesize / mtd->writesize;
+
+       printk(PRINT_PREF "MTD device size %llu, eraseblock size %u, "
+              "page size %u, count of eraseblocks %u, pages per "
+              "eraseblock %u, OOB size %u\n",
+              (unsigned long long)mtd->size, mtd->erasesize,
+              pgsize, ebcnt, pgcnt, mtd->oobsize);
+
+       err = -ENOMEM;
+       iobuf = kmalloc(mtd->erasesize, GFP_KERNEL);
+       if (!iobuf) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               goto out;
+       }
+
+       simple_srand(1);
+       set_random_data(iobuf, mtd->erasesize);
+
+       err = scan_for_bad_eraseblocks();
+       if (err)
+               goto out;
+
+       err = erase_whole_device();
+       if (err)
+               goto out;
+
+       /* Write all eraseblocks, 1 eraseblock at a time */
+       printk(PRINT_PREF "testing eraseblock write speed\n");
+       start_timing();
+       for (i = 0; i < ebcnt; ++i) {
+               if (bbt[i])
+                       continue;
+               err = write_eraseblock(i);
+               if (err)
+                       goto out;
+               cond_resched();
+       }
+       stop_timing();
+       speed = calc_speed();
+       printk(PRINT_PREF "eraseblock write speed is %ld KiB/s\n", speed);
+
+       /* Read all eraseblocks, 1 eraseblock at a time */
+       printk(PRINT_PREF "testing eraseblock read speed\n");
+       start_timing();
+       for (i = 0; i < ebcnt; ++i) {
+               if (bbt[i])
+                       continue;
+               err = read_eraseblock(i);
+               if (err)
+                       goto out;
+               cond_resched();
+       }
+       stop_timing();
+       speed = calc_speed();
+       printk(PRINT_PREF "eraseblock read speed is %ld KiB/s\n", speed);
+
+       err = erase_whole_device();
+       if (err)
+               goto out;
+
+       /* Write all eraseblocks, 1 page at a time */
+       printk(PRINT_PREF "testing page write speed\n");
+       start_timing();
+       for (i = 0; i < ebcnt; ++i) {
+               if (bbt[i])
+                       continue;
+               err = write_eraseblock_by_page(i);
+               if (err)
+                       goto out;
+               cond_resched();
+       }
+       stop_timing();
+       speed = calc_speed();
+       printk(PRINT_PREF "page write speed is %ld KiB/s\n", speed);
+
+       /* Read all eraseblocks, 1 page at a time */
+       printk(PRINT_PREF "testing page read speed\n");
+       start_timing();
+       for (i = 0; i < ebcnt; ++i) {
+               if (bbt[i])
+                       continue;
+               err = read_eraseblock_by_page(i);
+               if (err)
+                       goto out;
+               cond_resched();
+       }
+       stop_timing();
+       speed = calc_speed();
+       printk(PRINT_PREF "page read speed is %ld KiB/s\n", speed);
+
+       err = erase_whole_device();
+       if (err)
+               goto out;
+
+       /* Write all eraseblocks, 2 pages at a time */
+       printk(PRINT_PREF "testing 2 page write speed\n");
+       start_timing();
+       for (i = 0; i < ebcnt; ++i) {
+               if (bbt[i])
+                       continue;
+               err = write_eraseblock_by_2pages(i);
+               if (err)
+                       goto out;
+               cond_resched();
+       }
+       stop_timing();
+       speed = calc_speed();
+       printk(PRINT_PREF "2 page write speed is %ld KiB/s\n", speed);
+
+       /* Read all eraseblocks, 2 pages at a time */
+       printk(PRINT_PREF "testing 2 page read speed\n");
+       start_timing();
+       for (i = 0; i < ebcnt; ++i) {
+               if (bbt[i])
+                       continue;
+               err = read_eraseblock_by_2pages(i);
+               if (err)
+                       goto out;
+               cond_resched();
+       }
+       stop_timing();
+       speed = calc_speed();
+       printk(PRINT_PREF "2 page read speed is %ld KiB/s\n", speed);
+
+       /* Erase all eraseblocks */
+       printk(PRINT_PREF "Testing erase speed\n");
+       start_timing();
+       for (i = 0; i < ebcnt; ++i) {
+               if (bbt[i])
+                       continue;
+               err = erase_eraseblock(i);
+               if (err)
+                       goto out;
+               cond_resched();
+       }
+       stop_timing();
+       speed = calc_speed();
+       printk(PRINT_PREF "erase speed is %ld KiB/s\n", speed);
+
+       printk(PRINT_PREF "finished\n");
+out:
+       kfree(iobuf);
+       kfree(bbt);
+       put_mtd_device(mtd);
+       if (err)
+               printk(PRINT_PREF "error %d occurred\n", err);
+       printk(KERN_INFO "=================================================\n");
+       return err;
+}
+module_init(mtd_speedtest_init);
+
+static void __exit mtd_speedtest_exit(void)
+{
+       return;
+}
+module_exit(mtd_speedtest_exit);
+
+MODULE_DESCRIPTION("Speed test module");
+MODULE_AUTHOR("Adrian Hunter");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mtd/tests/mtd_stresstest.c b/drivers/mtd/tests/mtd_stresstest.c
new file mode 100644 (file)
index 0000000..6392047
--- /dev/null
@@ -0,0 +1,330 @@
+/*
+ * 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>
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/err.h>
+#include <linux/mtd/mtd.h>
+#include <linux/sched.h>
+#include <linux/vmalloc.h>
+
+#define PRINT_PREF KERN_INFO "mtd_stresstest: "
+
+static int dev;
+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 unsigned long next = 1;
+
+static inline unsigned int simple_rand(void)
+{
+       next = next * 1103515245 + 12345;
+       return (unsigned int)((next / 65536) % 32768);
+}
+
+static inline void simple_srand(unsigned long seed)
+{
+       next = seed;
+}
+
+static int rand_eb(void)
+{
+       int eb;
+
+again:
+       if (ebcnt < 32768)
+               eb = simple_rand();
+       else
+               eb = (simple_rand() << 15) | simple_rand();
+       /* 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)
+{
+       int offs;
+
+       if (bufsize < 32768)
+               offs = simple_rand();
+       else
+               offs = (simple_rand() << 15) | simple_rand();
+       offs %= bufsize;
+       return offs;
+}
+
+static int rand_len(int offs)
+{
+       int len;
+
+       if (bufsize < 32768)
+               len = simple_rand();
+       else
+               len = (simple_rand() << 15) | simple_rand();
+       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)) {
+               printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
+               return err;
+       }
+
+       if (unlikely(ei.state == MTD_ERASE_FAILED)) {
+               printk(PRINT_PREF "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)
+               printk(PRINT_PREF "block %d is bad\n", ebnum);
+       return ret;
+}
+
+static int do_read(void)
+{
+       size_t read = 0;
+       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 (err == -EUCLEAN)
+               err = 0;
+       if (unlikely(err || read != len)) {
+               printk(PRINT_PREF "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 = 0;
+       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)) {
+               printk(PRINT_PREF "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 (simple_rand() & 1)
+               return do_read();
+       else
+               return do_write();
+}
+
+static int scan_for_bad_eraseblocks(void)
+{
+       int i, bad = 0;
+
+       bbt = kmalloc(ebcnt, GFP_KERNEL);
+       if (!bbt) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               return -ENOMEM;
+       }
+       memset(bbt, 0 , ebcnt);
+
+       printk(PRINT_PREF "scanning for bad eraseblocks\n");
+       for (i = 0; i < ebcnt; ++i) {
+               bbt[i] = is_block_bad(i) ? 1 : 0;
+               if (bbt[i])
+                       bad += 1;
+               cond_resched();
+       }
+       printk(PRINT_PREF "scanned %d eraseblocks, %d are bad\n", i, bad);
+       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");
+       printk(PRINT_PREF "MTD device: %d\n", dev);
+
+       mtd = get_mtd_device(NULL, dev);
+       if (IS_ERR(mtd)) {
+               err = PTR_ERR(mtd);
+               printk(PRINT_PREF "error: cannot get MTD device\n");
+               return err;
+       }
+
+       if (mtd->writesize == 1) {
+               printk(PRINT_PREF "not NAND flash, assume page size is 512 "
+                      "bytes.\n");
+               pgsize = 512;
+       } else
+               pgsize = mtd->writesize;
+
+       tmp = mtd->size;
+       do_div(tmp, mtd->erasesize);
+       ebcnt = tmp;
+       pgcnt = mtd->erasesize / mtd->writesize;
+
+       printk(PRINT_PREF "MTD device size %llu, eraseblock size %u, "
+              "page size %u, count of eraseblocks %u, pages per "
+              "eraseblock %u, OOB size %u\n",
+              (unsigned long long)mtd->size, mtd->erasesize,
+              pgsize, ebcnt, pgcnt, mtd->oobsize);
+
+       /* 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) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               goto out;
+       }
+       for (i = 0; i < ebcnt; i++)
+               offsets[i] = mtd->erasesize;
+       simple_srand(current->pid);
+       for (i = 0; i < bufsize; i++)
+               writebuf[i] = simple_rand();
+
+       err = scan_for_bad_eraseblocks();
+       if (err)
+               goto out;
+
+       /* Do operations */
+       printk(PRINT_PREF "doing operations\n");
+       for (op = 0; op < count; op++) {
+               if ((op & 1023) == 0)
+                       printk(PRINT_PREF "%d operations done\n", op);
+               err = do_operation();
+               if (err)
+                       goto out;
+               cond_resched();
+       }
+       printk(PRINT_PREF "finished, %d operations done\n", op);
+
+out:
+       kfree(offsets);
+       kfree(bbt);
+       vfree(writebuf);
+       vfree(readbuf);
+       put_mtd_device(mtd);
+       if (err)
+               printk(PRINT_PREF "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");
diff --git a/drivers/mtd/tests/mtd_subpagetest.c b/drivers/mtd/tests/mtd_subpagetest.c
new file mode 100644 (file)
index 0000000..4c5e04d
--- /dev/null
@@ -0,0 +1,525 @@
+/*
+ * 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>
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/err.h>
+#include <linux/mtd/mtd.h>
+#include <linux/sched.h>
+
+#define PRINT_PREF KERN_INFO "mtd_subpagetest: "
+
+static int dev;
+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 unsigned long next = 1;
+
+static inline unsigned int simple_rand(void)
+{
+       next = next * 1103515245 + 12345;
+       return (unsigned int)((next / 65536) % 32768);
+}
+
+static inline void simple_srand(unsigned long seed)
+{
+       next = seed;
+}
+
+static void set_random_data(unsigned char *buf, size_t len)
+{
+       size_t i;
+
+       for (i = 0; i < len; ++i)
+               buf[i] = simple_rand();
+}
+
+static 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) {
+               printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
+               return err;
+       }
+
+       if (ei.state == MTD_ERASE_FAILED) {
+               printk(PRINT_PREF "some erase error occurred at EB %d\n",
+                      ebnum);
+               return -EIO;
+       }
+
+       return 0;
+}
+
+static int erase_whole_device(void)
+{
+       int err;
+       unsigned int i;
+
+       printk(PRINT_PREF "erasing whole device\n");
+       for (i = 0; i < ebcnt; ++i) {
+               if (bbt[i])
+                       continue;
+               err = erase_eraseblock(i);
+               if (err)
+                       return err;
+               cond_resched();
+       }
+       printk(PRINT_PREF "erased %u eraseblocks\n", i);
+       return 0;
+}
+
+static int write_eraseblock(int ebnum)
+{
+       size_t written = 0;
+       int err = 0;
+       loff_t addr = ebnum * mtd->erasesize;
+
+       set_random_data(writebuf, subpgsize);
+       err = mtd->write(mtd, addr, subpgsize, &written, writebuf);
+       if (unlikely(err || written != subpgsize)) {
+               printk(PRINT_PREF "error: write failed at %#llx\n",
+                      (long long)addr);
+               if (written != subpgsize) {
+                       printk(PRINT_PREF "  write size: %#x\n", subpgsize);
+                       printk(PRINT_PREF "  written: %#x\n", written);
+               }
+               return err ? err : -1;
+       }
+
+       addr += subpgsize;
+
+       set_random_data(writebuf, subpgsize);
+       err = mtd->write(mtd, addr, subpgsize, &written, writebuf);
+       if (unlikely(err || written != subpgsize)) {
+               printk(PRINT_PREF "error: write failed at %#llx\n",
+                      (long long)addr);
+               if (written != subpgsize) {
+                       printk(PRINT_PREF "  write size: %#x\n", subpgsize);
+                       printk(PRINT_PREF "  written: %#x\n", written);
+               }
+               return err ? err : -1;
+       }
+
+       return err;
+}
+
+static int write_eraseblock2(int ebnum)
+{
+       size_t written = 0;
+       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;
+               set_random_data(writebuf, subpgsize * k);
+               err = mtd->write(mtd, addr, subpgsize * k, &written, writebuf);
+               if (unlikely(err || written != subpgsize * k)) {
+                       printk(PRINT_PREF "error: write failed at %#llx\n",
+                              (long long)addr);
+                       if (written != subpgsize) {
+                               printk(PRINT_PREF "  write size: %#x\n",
+                                      subpgsize * k);
+                               printk(PRINT_PREF "  written: %#08x\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 = 0;
+       int err = 0;
+       loff_t addr = ebnum * mtd->erasesize;
+
+       set_random_data(writebuf, subpgsize);
+       clear_data(readbuf, subpgsize);
+       read = 0;
+       err = mtd->read(mtd, addr, subpgsize, &read, readbuf);
+       if (unlikely(err || read != subpgsize)) {
+               if (err == -EUCLEAN && read == subpgsize) {
+                       printk(PRINT_PREF "ECC correction at %#llx\n",
+                              (long long)addr);
+                       err = 0;
+               } else {
+                       printk(PRINT_PREF "error: read failed at %#llx\n",
+                              (long long)addr);
+                       return err ? err : -1;
+               }
+       }
+       if (unlikely(memcmp(readbuf, writebuf, subpgsize))) {
+               printk(PRINT_PREF "error: verify failed at %#llx\n",
+                      (long long)addr);
+               printk(PRINT_PREF "------------- written----------------\n");
+               print_subpage(writebuf);
+               printk(PRINT_PREF "------------- read ------------------\n");
+               print_subpage(readbuf);
+               printk(PRINT_PREF "-------------------------------------\n");
+               errcnt += 1;
+       }
+
+       addr += subpgsize;
+
+       set_random_data(writebuf, subpgsize);
+       clear_data(readbuf, subpgsize);
+       read = 0;
+       err = mtd->read(mtd, addr, subpgsize, &read, readbuf);
+       if (unlikely(err || read != subpgsize)) {
+               if (err == -EUCLEAN && read == subpgsize) {
+                       printk(PRINT_PREF "ECC correction at %#llx\n",
+                              (long long)addr);
+                       err = 0;
+               } else {
+                       printk(PRINT_PREF "error: read failed at %#llx\n",
+                              (long long)addr);
+                       return err ? err : -1;
+               }
+       }
+       if (unlikely(memcmp(readbuf, writebuf, subpgsize))) {
+               printk(PRINT_PREF "error: verify failed at %#llx\n",
+                      (long long)addr);
+               printk(PRINT_PREF "------------- written----------------\n");
+               print_subpage(writebuf);
+               printk(PRINT_PREF "------------- read ------------------\n");
+               print_subpage(readbuf);
+               printk(PRINT_PREF "-------------------------------------\n");
+               errcnt += 1;
+       }
+
+       return err;
+}
+
+static int verify_eraseblock2(int ebnum)
+{
+       size_t read = 0;
+       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;
+               set_random_data(writebuf, subpgsize * k);
+               clear_data(readbuf, subpgsize * k);
+               read = 0;
+               err = mtd->read(mtd, addr, subpgsize * k, &read, readbuf);
+               if (unlikely(err || read != subpgsize * k)) {
+                       if (err == -EUCLEAN && read == subpgsize * k) {
+                               printk(PRINT_PREF "ECC correction at %#llx\n",
+                                      (long long)addr);
+                               err = 0;
+                       } else {
+                               printk(PRINT_PREF "error: read failed at "
+                                      "%#llx\n", (long long)addr);
+                               return err ? err : -1;
+                       }
+               }
+               if (unlikely(memcmp(readbuf, writebuf, subpgsize * k))) {
+                       printk(PRINT_PREF "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 = 0;
+       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);
+               read = 0;
+               err = mtd->read(mtd, addr, subpgsize, &read, readbuf);
+               if (unlikely(err || read != subpgsize)) {
+                       if (err == -EUCLEAN && read == subpgsize) {
+                               printk(PRINT_PREF "ECC correction at %#llx\n",
+                                      (long long)addr);
+                               err = 0;
+                       } else {
+                               printk(PRINT_PREF "error: read failed at "
+                                      "%#llx\n", (long long)addr);
+                               return err ? err : -1;
+                       }
+               }
+               if (unlikely(memcmp(readbuf, writebuf, subpgsize))) {
+                       printk(PRINT_PREF "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;
+
+       printk(PRINT_PREF "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)
+                       printk(PRINT_PREF "verified up to eraseblock %u\n", i);
+               cond_resched();
+       }
+       printk(PRINT_PREF "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)
+               printk(PRINT_PREF "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) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               return -ENOMEM;
+       }
+       memset(bbt, 0 , ebcnt);
+
+       printk(PRINT_PREF "scanning for bad eraseblocks\n");
+       for (i = 0; i < ebcnt; ++i) {
+               bbt[i] = is_block_bad(i) ? 1 : 0;
+               if (bbt[i])
+                       bad += 1;
+               cond_resched();
+       }
+       printk(PRINT_PREF "scanned %d eraseblocks, %d are bad\n", i, bad);
+       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");
+       printk(PRINT_PREF "MTD device: %d\n", dev);
+
+       mtd = get_mtd_device(NULL, dev);
+       if (IS_ERR(mtd)) {
+               err = PTR_ERR(mtd);
+               printk(PRINT_PREF "error: cannot get MTD device\n");
+               return err;
+       }
+
+       if (mtd->type != MTD_NANDFLASH) {
+               printk(PRINT_PREF "this test requires NAND flash\n");
+               goto out;
+       }
+
+       subpgsize = mtd->writesize >> mtd->subpage_sft;
+       printk(PRINT_PREF "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) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               goto out;
+       }
+       readbuf = kmalloc(bufsize, GFP_KERNEL);
+       if (!readbuf) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               goto out;
+       }
+
+       tmp = mtd->size;
+       do_div(tmp, mtd->erasesize);
+       ebcnt = tmp;
+       pgcnt = mtd->erasesize / mtd->writesize;
+
+       err = scan_for_bad_eraseblocks();
+       if (err)
+               goto out;
+
+       err = erase_whole_device();
+       if (err)
+               goto out;
+
+       printk(PRINT_PREF "writing whole device\n");
+       simple_srand(1);
+       for (i = 0; i < ebcnt; ++i) {
+               if (bbt[i])
+                       continue;
+               err = write_eraseblock(i);
+               if (unlikely(err))
+                       goto out;
+               if (i % 256 == 0)
+                       printk(PRINT_PREF "written up to eraseblock %u\n", i);
+               cond_resched();
+       }
+       printk(PRINT_PREF "written %u eraseblocks\n", i);
+
+       simple_srand(1);
+       printk(PRINT_PREF "verifying all eraseblocks\n");
+       for (i = 0; i < ebcnt; ++i) {
+               if (bbt[i])
+                       continue;
+               err = verify_eraseblock(i);
+               if (unlikely(err))
+                       goto out;
+               if (i % 256 == 0)
+                       printk(PRINT_PREF "verified up to eraseblock %u\n", i);
+               cond_resched();
+       }
+       printk(PRINT_PREF "verified %u eraseblocks\n", i);
+
+       err = erase_whole_device();
+       if (err)
+               goto out;
+
+       err = verify_all_eraseblocks_ff();
+       if (err)
+               goto out;
+
+       /* Write all eraseblocks */
+       simple_srand(3);
+       printk(PRINT_PREF "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)
+                       printk(PRINT_PREF "written up to eraseblock %u\n", i);
+               cond_resched();
+       }
+       printk(PRINT_PREF "written %u eraseblocks\n", i);
+
+       /* Check all eraseblocks */
+       simple_srand(3);
+       printk(PRINT_PREF "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)
+                       printk(PRINT_PREF "verified up to eraseblock %u\n", i);
+               cond_resched();
+       }
+       printk(PRINT_PREF "verified %u eraseblocks\n", i);
+
+       err = erase_whole_device();
+       if (err)
+               goto out;
+
+       err = verify_all_eraseblocks_ff();
+       if (err)
+               goto out;
+
+       printk(PRINT_PREF "finished with %d errors\n", errcnt);
+
+out:
+       kfree(bbt);
+       kfree(readbuf);
+       kfree(writebuf);
+       put_mtd_device(mtd);
+       if (err)
+               printk(PRINT_PREF "error %d occurred\n", err);
+       printk(KERN_INFO "=================================================\n");
+       return err;
+}
+module_init(mtd_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");
diff --git a/drivers/mtd/tests/mtd_torturetest.c b/drivers/mtd/tests/mtd_torturetest.c
new file mode 100644 (file)
index 0000000..2928d9e
--- /dev/null
@@ -0,0 +1,530 @@
+/*
+ * 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.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/err.h>
+#include <linux/mtd/mtd.h>
+#include <linux/sched.h>
+
+#define PRINT_PREF KERN_INFO "mtd_torturetest: "
+#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;
+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) {
+               printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
+               return err;
+       }
+
+       if (ei.state == MTD_ERASE_FAILED) {
+               printk(PRINT_PREF "some erase error occurred at EB %d\n",
+                      ebnum);
+               return -EIO;
+       }
+
+       return 0;
+}
+
+/*
+ * 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 = 0;
+       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 (err == -EUCLEAN)
+               printk(PRINT_PREF "single bit flip occurred at EB %d "
+                      "MTD reported that it was fixed.\n", ebnum);
+       else if (err) {
+               printk(PRINT_PREF "error %d while reading EB %d, "
+                      "read %zd\n", err, ebnum, read);
+               return err;
+       }
+
+       if (read != len) {
+               printk(PRINT_PREF "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)) {
+               printk(PRINT_PREF "read wrong data from EB %d\n", ebnum);
+               report_corrupt(check_buf, buf);
+
+               if (retries++ < RETRIES) {
+                       /* Try read again */
+                       yield();
+                       printk(PRINT_PREF "re-try reading data from EB %d\n",
+                              ebnum);
+                       goto retry;
+               } else {
+                       printk(PRINT_PREF "retried %d times, still errors, "
+                              "give-up\n", RETRIES);
+                       return -EINVAL;
+               }
+       }
+
+       if (retries != 0)
+               printk(PRINT_PREF "only attempt number %d was OK (!!!)\n",
+                      retries);
+
+       return 0;
+}
+
+static inline int write_pattern(int ebnum, void *buf)
+{
+       int err;
+       size_t written = 0;
+       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) {
+               printk(PRINT_PREF "error %d while writing EB %d, written %zd"
+                     " bytes\n", err, ebnum, written);
+               return err;
+       }
+       if (written != len) {
+               printk(PRINT_PREF "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[ebcnt];
+
+       printk(KERN_INFO "\n");
+       printk(KERN_INFO "=================================================\n");
+       printk(PRINT_PREF "Warning: this program is trying to wear out your "
+              "flash, stop it if this is not wanted.\n");
+       printk(PRINT_PREF "MTD device: %d\n", dev);
+       printk(PRINT_PREF "torture %d eraseblocks (%d-%d) of mtd%d\n",
+              ebcnt, eb, eb + ebcnt - 1, dev);
+       if (pgcnt)
+               printk(PRINT_PREF "torturing just %d pages per eraseblock\n",
+                       pgcnt);
+       printk(PRINT_PREF "write verify %s\n", check ? "enabled" : "disabled");
+
+       mtd = get_mtd_device(NULL, dev);
+       if (IS_ERR(mtd)) {
+               err = PTR_ERR(mtd);
+               printk(PRINT_PREF "error: cannot get MTD device\n");
+               return err;
+       }
+
+       if (mtd->writesize == 1) {
+               printk(PRINT_PREF "not NAND flash, assume page size is 512 "
+                      "bytes.\n");
+               pgsize = 512;
+       } else
+               pgsize = mtd->writesize;
+
+       if (pgcnt && (pgcnt > mtd->erasesize / pgsize || pgcnt < 0)) {
+               printk(PRINT_PREF "error: invalid pgcnt value %d\n", pgcnt);
+               goto out_mtd;
+       }
+
+       err = -ENOMEM;
+       patt_5A5 = kmalloc(mtd->erasesize, GFP_KERNEL);
+       if (!patt_5A5) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               goto out_mtd;
+       }
+
+       patt_A5A = kmalloc(mtd->erasesize, GFP_KERNEL);
+       if (!patt_A5A) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               goto out_patt_5A5;
+       }
+
+       patt_FF = kmalloc(mtd->erasesize, GFP_KERNEL);
+       if (!patt_FF) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               goto out_patt_A5A;
+       }
+
+       check_buf = kmalloc(mtd->erasesize, GFP_KERNEL);
+       if (!check_buf) {
+               printk(PRINT_PREF "error: cannot allocate memory\n");
+               goto out_patt_FF;
+       }
+
+       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.
+        */
+       memset(&bad_ebs[0], 0, sizeof(int) * ebcnt);
+       if (mtd->block_isbad) {
+               for (i = eb; i < eb + ebcnt; i++) {
+                       err = mtd->block_isbad(mtd,
+                                              (loff_t)i * mtd->erasesize);
+
+                       if (err < 0) {
+                               printk(PRINT_PREF "block_isbad() returned %d "
+                                      "for EB %d\n", err, i);
+                               goto out;
+                       }
+
+                       if (err) {
+                               printk("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) {
+                                       printk(PRINT_PREF "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) {
+                                       printk(PRINT_PREF "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;
+                       printk(PRINT_PREF "%08u erase cycles done, took %lu "
+                              "milliseconds (%lu seconds)\n",
+                              erase_cycles, ms, ms / 1000);
+                       start_timing();
+               }
+
+               if (!infinite && --cycles_count == 0)
+                       break;
+       }
+out:
+
+       printk(PRINT_PREF "finished after %u erase cycles\n",
+              erase_cycles);
+       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)
+               printk(PRINT_PREF "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++;
+
+       printk(PRINT_PREF "verify fails on %d pages, %d bytes/%d bits\n",
+              pages, bytes, bits);
+       printk(PRINT_PREF "The following is a list of all differences between"
+              " what was read from flash and what was expected\n");
+
+       for (i = 0; i < check_len; i += pgsize) {
+               cond_resched();
+               bytes = bits = 0;
+               first = countdiffs(written, read, i, pgsize, &bytes,
+                                  &bits);
+               if (first < 0)
+                       continue;
+
+               printk("-------------------------------------------------------"
+                      "----------------------------------\n");
+
+               printk(PRINT_PREF "Page %d has %d bytes/%d bits failing verify,"
+                      " starting at offset 0x%x\n",
+                      (mtd->erasesize - check_len + i) / pgsize,
+                      bytes, bits, first);
+
+               offset = first & ~0x7;
+               len = ((first + bytes) | 0x7) + 1 - offset;
+
+               print_bufs(read, written, offset, len);
+       }
+}
+
+static void print_bufs(unsigned char *read, unsigned char *written, int start,
+                      int len)
+{
+       int i = 0, j1, j2;
+       char *diff;
+
+       printk("Offset       Read                          Written\n");
+       while (i < len) {
+               printk("0x%08x: ", start + i);
+               diff = "   ";
+               for (j1 = 0; j1 < 8 && i + j1 < len; j1++) {
+                       printk(" %02x", read[start + i + j1]);
+                       if (read[start + i + j1] != written[start + i + j1])
+                               diff = "***";
+               }
+
+               while (j1 < 8) {
+                       printk(" ");
+                       j1 += 1;
+               }
+
+               printk("  %s ", diff);
+
+               for (j2 = 0; j2 < 8 && i + j2 < len; j2++)
+                       printk(" %02x", written[start + i + j2]);
+               printk("\n");
+               i += 8;
+       }
+}
+
+/*
+ * Count the number of differing bytes and bits and return the first differing
+ * offset.
+ */
+static int countdiffs(unsigned char *buf, unsigned char *check_buf,
+                     unsigned offset, unsigned len, unsigned *bytesp,
+                     unsigned *bitsp)
+{
+       unsigned i, bit;
+       int first = -1;
+
+       for (i = offset; i < offset + len; i++)
+               if (buf[i] != check_buf[i]) {
+                       first = i;
+                       break;
+               }
+
+       while (i < offset + len) {
+               if (buf[i] != check_buf[i]) {
+                       (*bytesp)++;
+                       bit = 1;
+                       while (bit < 256) {
+                               if ((buf[i] & bit) != (check_buf[i] & bit))
+                                       (*bitsp)++;
+                               bit <<= 1;
+                       }
+               }
+               i++;
+       }
+
+       return first;
+}
+
+MODULE_DESCRIPTION("Eraseblock torturing module");
+MODULE_AUTHOR("Artem Bityutskiy, Jarkko Lavinen, Adrian Hunter");
+MODULE_LICENSE("GPL");