Skip to content

Commit

Permalink
---
Browse files Browse the repository at this point in the history 
yaml
---
r: 347151
b: refs/heads/master
c: 600ed67
h: refs/heads/master
i:
  347149: b22a4f2
  347147: 09e9167
  347143: 0fd86cd
  347135: 64d6a26
v: v3
  • Loading branch information
Vikram Narayanan authored and Artem Bityutskiy committed Nov 15, 2012
1 parent 95e481c commit 5cd9345
Show file tree
Hide file tree
Showing 2 changed files with 38 additions and 37 deletions.
2 changes: 1 addition & 1 deletion [refs]
View file
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: a90019e25e0caed04d3704235b5ea984aaa28da8
refs/heads/master: 600ed67562e5349be92867825ab5505526eac139
73 changes: 37 additions & 36 deletions trunk/drivers/mtd/tests/mtd_nandbiterrs.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,9 @@
* this program; see the file COPYING. If not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/init.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
Expand All @@ -47,8 +50,6 @@
#include <linux/mtd/nand.h>
#include <linux/slab.h>

#define msg(FMT, VA...) pr_info("mtd_nandbiterrs: "FMT, ##VA)

static int dev;
module_param(dev, int, S_IRUGO);
MODULE_PARM_DESC(dev, "MTD device number to use");
Expand Down Expand Up @@ -103,7 +104,7 @@ static int erase_block(void)
struct erase_info ei;
loff_t addr = eraseblock * mtd->erasesize;

msg("erase_block\n");
pr_info("erase_block\n");

memset(&ei, 0, sizeof(struct erase_info));
ei.mtd = mtd;
Expand All @@ -112,7 +113,7 @@ static int erase_block(void)

err = mtd_erase(mtd, &ei);
if (err || ei.state == MTD_ERASE_FAILED) {
msg("error %d while erasing\n", err);
pr_err("error %d while erasing\n", err);
if (!err)
err = -EIO;
return err;
Expand All @@ -128,11 +129,11 @@ static int write_page(int log)
size_t written;

if (log)
msg("write_page\n");
pr_info("write_page\n");

err = mtd_write(mtd, offset, mtd->writesize, &written, wbuffer);
if (err || written != mtd->writesize) {
msg("error: write failed at %#llx\n", (long long)offset);
pr_err("error: write failed at %#llx\n", (long long)offset);
if (!err)
err = -EIO;
}
Expand All @@ -147,7 +148,7 @@ static int rewrite_page(int log)
struct mtd_oob_ops ops;

if (log)
msg("rewrite page\n");
pr_info("rewrite page\n");

ops.mode = MTD_OPS_RAW; /* No ECC */
ops.len = mtd->writesize;
Expand All @@ -160,7 +161,7 @@ static int rewrite_page(int log)

err = mtd_write_oob(mtd, offset, &ops);
if (err || ops.retlen != mtd->writesize) {
msg("error: write_oob failed (%d)\n", err);
pr_err("error: write_oob failed (%d)\n", err);
if (!err)
err = -EIO;
}
Expand All @@ -177,7 +178,7 @@ static int read_page(int log)
struct mtd_ecc_stats oldstats;

if (log)
msg("read_page\n");
pr_info("read_page\n");

/* Saving last mtd stats */
memcpy(&oldstats, &mtd->ecc_stats, sizeof(oldstats));
Expand All @@ -187,7 +188,7 @@ static int read_page(int log)
err = mtd->ecc_stats.corrected - oldstats.corrected;

if (err < 0 || read != mtd->writesize) {
msg("error: read failed at %#llx\n", (long long)offset);
pr_err("error: read failed at %#llx\n", (long long)offset);
if (err >= 0)
err = -EIO;
}
Expand All @@ -201,11 +202,11 @@ static int verify_page(int log)
unsigned i, errs = 0;

if (log)
msg("verify_page\n");
pr_info("verify_page\n");

for (i = 0; i < mtd->writesize; i++) {
if (rbuffer[i] != hash(i+seed)) {
msg("Error: page offset %u, expected %02x, got %02x\n",
pr_err("Error: page offset %u, expected %02x, got %02x\n",
i, hash(i+seed), rbuffer[i]);
errs++;
}
Expand All @@ -230,13 +231,13 @@ static int insert_biterror(unsigned byte)
for (bit = 7; bit >= 0; bit--) {
if (CBIT(wbuffer[byte], bit)) {
BCLR(wbuffer[byte], bit);
msg("Inserted biterror @ %u/%u\n", byte, bit);
pr_info("Inserted biterror @ %u/%u\n", byte, bit);
return 0;
}
}
byte++;
}
msg("biterror: Failed to find a '1' bit\n");
pr_err("biterror: Failed to find a '1' bit\n");
return -EIO;
}

Expand All @@ -248,7 +249,7 @@ static int incremental_errors_test(void)
unsigned i;
unsigned errs_per_subpage = 0;

msg("incremental biterrors test\n");
pr_info("incremental biterrors test\n");

for (i = 0; i < mtd->writesize; i++)
wbuffer[i] = hash(i+seed);
Expand All @@ -265,21 +266,21 @@ static int incremental_errors_test(void)

err = read_page(1);
if (err > 0)
msg("Read reported %d corrected bit errors\n", err);
pr_info("Read reported %d corrected bit errors\n", err);
if (err < 0) {
msg("After %d biterrors per subpage, read reported error %d\n",
pr_err("After %d biterrors per subpage, read reported error %d\n",
errs_per_subpage, err);
err = 0;
goto exit;
}

err = verify_page(1);
if (err) {
msg("ECC failure, read data is incorrect despite read success\n");
pr_err("ECC failure, read data is incorrect despite read success\n");
goto exit;
}

msg("Successfully corrected %d bit errors per subpage\n",
pr_info("Successfully corrected %d bit errors per subpage\n",
errs_per_subpage);

for (i = 0; i < subcount; i++) {
Expand Down Expand Up @@ -311,7 +312,7 @@ static int overwrite_test(void)

memset(bitstats, 0, sizeof(bitstats));

msg("overwrite biterrors test\n");
pr_info("overwrite biterrors test\n");

for (i = 0; i < mtd->writesize; i++)
wbuffer[i] = hash(i+seed);
Expand All @@ -329,26 +330,26 @@ static int overwrite_test(void)
err = read_page(0);
if (err >= 0) {
if (err >= MAXBITS) {
msg("Implausible number of bit errors corrected\n");
pr_info("Implausible number of bit errors corrected\n");
err = -EIO;
break;
}
bitstats[err]++;
if (err > max_corrected) {
max_corrected = err;
msg("Read reported %d corrected bit errors\n",
pr_info("Read reported %d corrected bit errors\n",
err);
}
} else { /* err < 0 */
msg("Read reported error %d\n", err);
pr_info("Read reported error %d\n", err);
err = 0;
break;
}

err = verify_page(0);
if (err) {
bitstats[max_corrected] = opno;
msg("ECC failure, read data is incorrect despite read success\n");
pr_info("ECC failure, read data is incorrect despite read success\n");
break;
}

Expand All @@ -357,9 +358,9 @@ static int overwrite_test(void)

/* At this point bitstats[0] contains the number of ops with no bit
* errors, bitstats[1] the number of ops with 1 bit error, etc. */
msg("Bit error histogram (%d operations total):\n", opno);
pr_info("Bit error histogram (%d operations total):\n", opno);
for (i = 0; i < max_corrected; i++)
msg("Page reads with %3d corrected bit errors: %d\n",
pr_info("Page reads with %3d corrected bit errors: %d\n",
i, bitstats[i]);

exit:
Expand All @@ -370,36 +371,36 @@ static int __init mtd_nandbiterrs_init(void)
{
int err = 0;

msg("\n");
msg("==================================================\n");
msg("MTD device: %d\n", dev);
printk("\n");
printk(KERN_INFO "==================================================\n");
pr_info("MTD device: %d\n", dev);

mtd = get_mtd_device(NULL, dev);
if (IS_ERR(mtd)) {
err = PTR_ERR(mtd);
msg("error: cannot get MTD device\n");
pr_err("error: cannot get MTD device\n");
goto exit_mtddev;
}

if (mtd->type != MTD_NANDFLASH) {
msg("this test requires NAND flash\n");
pr_info("this test requires NAND flash\n");
err = -ENODEV;
goto exit_nand;
}

msg("MTD device size %llu, eraseblock=%u, page=%u, oob=%u\n",
pr_info("MTD device size %llu, eraseblock=%u, page=%u, oob=%u\n",
(unsigned long long)mtd->size, mtd->erasesize,
mtd->writesize, mtd->oobsize);

subsize = mtd->writesize >> mtd->subpage_sft;
subcount = mtd->writesize / subsize;

msg("Device uses %d subpages of %d bytes\n", subcount, subsize);
pr_info("Device uses %d subpages of %d bytes\n", subcount, subsize);

offset = page_offset * mtd->writesize;
eraseblock = mtd_div_by_eb(offset, mtd);

msg("Using page=%u, offset=%llu, eraseblock=%u\n",
pr_info("Using page=%u, offset=%llu, eraseblock=%u\n",
page_offset, offset, eraseblock);

wbuffer = kmalloc(mtd->writesize, GFP_KERNEL);
Expand Down Expand Up @@ -432,8 +433,8 @@ static int __init mtd_nandbiterrs_init(void)
goto exit_error;

err = -EIO;
msg("finished successfully.\n");
msg("==================================================\n");
pr_info("finished successfully.\n");
printk(KERN_INFO "==================================================\n");

exit_error:
kfree(rbuffer);
Expand Down

0 comments on commit 5cd9345

Please sign in to comment.