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linux/drivers/mtd/tests/mtd_pagetest.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

635 lines
15 KiB
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/*
* 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/slab.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; i < ebcnt && bbt[i]; ++i)
addr0 += mtd->erasesize;
addrn = mtd->size;
for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++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; i < ebcnt && bbt[i]; ++i)
addr0 += mtd->erasesize;
addrn = mtd->size;
for (i = 0; i < ebcnt && bbt[ebcnt - i - 1]; ++i)
addrn -= mtd->erasesize;
/* Read 2nd-to-last page to pp1 */
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; i < ebcnt && bbt[i]; ++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; i < ebcnt && bbt[i]; ++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;
pgsize = mtd->writesize;
printk(PRINT_PREF "MTD device size %llu, eraseblock size %u, "
"page size %u, count of eraseblocks %u, pages per "
"eraseblock %u, OOB size %u\n",
(unsigned long long)mtd->size, mtd->erasesize,
pgsize, ebcnt, pgcnt, mtd->oobsize);
err = -ENOMEM;
bufsize = pgsize * 2;
writebuf = kmalloc(mtd->erasesize, GFP_KERNEL);
if (!writebuf) {
printk(PRINT_PREF "error: cannot allocate memory\n");
goto out;
}
twopages = kmalloc(bufsize, GFP_KERNEL);
if (!twopages) {
printk(PRINT_PREF "error: cannot allocate memory\n");
goto out;
}
boundary = kmalloc(bufsize, GFP_KERNEL);
if (!boundary) {
printk(PRINT_PREF "error: cannot allocate memory\n");
goto out;
}
err = scan_for_bad_eraseblocks();
if (err)
goto out;
/* Erase all eraseblocks */
printk(PRINT_PREF "erasing whole device\n");
for (i = 0; i < ebcnt; ++i) {
if (bbt[i])
continue;
err = erase_eraseblock(i);
if (err)
goto out;
cond_resched();
}
printk(PRINT_PREF "erased %u eraseblocks\n", i);
/* Write all eraseblocks */
simple_srand(1);
printk(PRINT_PREF "writing whole device\n");
for (i = 0; i < ebcnt; ++i) {
if (bbt[i])
continue;
err = write_eraseblock(i);
if (err)
goto out;
if (i % 256 == 0)
printk(PRINT_PREF "written up to eraseblock %u\n", i);
cond_resched();
}
printk(PRINT_PREF "written %u eraseblocks\n", i);
/* Check all eraseblocks */
simple_srand(1);
printk(PRINT_PREF "verifying all eraseblocks\n");
for (i = 0; i < ebcnt; ++i) {
if (bbt[i])
continue;
err = verify_eraseblock(i);
if (err)
goto out;
if (i % 256 == 0)
printk(PRINT_PREF "verified up to eraseblock %u\n", i);
cond_resched();
}
printk(PRINT_PREF "verified %u eraseblocks\n", i);
err = crosstest();
if (err)
goto out;
err = erasecrosstest();
if (err)
goto out;
err = erasetest();
if (err)
goto out;
printk(PRINT_PREF "finished with %d errors\n", errcnt);
out:
kfree(bbt);
kfree(boundary);
kfree(twopages);
kfree(writebuf);
put_mtd_device(mtd);
if (err)
printk(PRINT_PREF "error %d occurred\n", err);
printk(KERN_INFO "=================================================\n");
return err;
}
module_init(mtd_pagetest_init);
static void __exit mtd_pagetest_exit(void)
{
return;
}
module_exit(mtd_pagetest_exit);
MODULE_DESCRIPTION("NAND page test");
MODULE_AUTHOR("Adrian Hunter");
MODULE_LICENSE("GPL");
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