[PATCH] nandtest: Add more fields when bad byte found

[PATCH] nandtest: Add more fields when bad byte found

[Trent Piepho]

This can help to determine what is causing the problem.  E.g., is the
bad byte always in the same eraseblock?  Is it always 513 bytes into a
page with a hardware ECC chunk size of 512 bytes?

Example before and after (error at absolute address 123456 with 128kB
eraseblock and 2kB page sizes):

Byte 0xe240 is 12 should be 34
Block 0x1 byte 0xe240 (page 0x1c offset 0x240) is 0x12 should be 0x34

Signed-off-by: Trent Piepho <trent.piepho@igorinstitute.com>
---
 commands/nandtest.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/commands/nandtest.c b/commands/nandtest.c
index 1bb59c7fd..4a7db9cc7 100644
--- a/commands/nandtest.c
+++ b/commands/nandtest.c
@@ -169,8 +169,10 @@ static int erase_and_write(loff_t ofs, unsigned char *data,
 		printf("\ncompare failed. seed %d\n", seed);
 		for (i = 0; i < meminfo.erasesize; i++) {
 			if (data[i] != rbuf[i])
-				printf("Byte 0x%x is %02x should be %02x\n",
-				       i, rbuf[i], data[i]);
+				printf("Block 0x%llx byte 0x%0x (page 0x%x offset 0x%x) is %02x should be %02x\n",
+				       div64_ul(ofs, meminfo.erasesize), i,
+				       i / meminfo.writesize, i % meminfo.writesize,
+				       rbuf[i], data[i]);
 		}
 		return ret;
 	}
-- 
2.31.1


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Re: [PATCH] nandtest: Add more fields when bad byte found

[Sascha Hauer]

On Mon, Oct 11, 2021 at 12:07:25PM -0700, Trent Piepho wrote:
> This can help to determine what is causing the problem.  E.g., is the
> bad byte always in the same eraseblock?  Is it always 513 bytes into a
> page with a hardware ECC chunk size of 512 bytes?
> 
> Example before and after (error at absolute address 123456 with 128kB
> eraseblock and 2kB page sizes):
> 
> Byte 0xe240 is 12 should be 34
> Block 0x1 byte 0xe240 (page 0x1c offset 0x240) is 0x12 should be 0x34
> 
> Signed-off-by: Trent Piepho <trent.piepho@igorinstitute.com>
> ---
>  commands/nandtest.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)

Applied, thanks

Sascha

> 
> diff --git a/commands/nandtest.c b/commands/nandtest.c
> index 1bb59c7fd..4a7db9cc7 100644
> --- a/commands/nandtest.c
> +++ b/commands/nandtest.c
> @@ -169,8 +169,10 @@ static int erase_and_write(loff_t ofs, unsigned char *data,
>  		printf("\ncompare failed. seed %d\n", seed);
>  		for (i = 0; i < meminfo.erasesize; i++) {
>  			if (data[i] != rbuf[i])
> -				printf("Byte 0x%x is %02x should be %02x\n",
> -				       i, rbuf[i], data[i]);
> +				printf("Block 0x%llx byte 0x%0x (page 0x%x offset 0x%x) is %02x should be %02x\n",
> +				       div64_ul(ofs, meminfo.erasesize), i,
> +				       i / meminfo.writesize, i % meminfo.writesize,
> +				       rbuf[i], data[i]);
>  		}
>  		return ret;
>  	}
> -- 
> 2.31.1
> 
> 
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> barebox@lists.infradead.org
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> 

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