linux-kernel - Re: [PATCH v2 0/4] mtd: rawnand: Support bad block markers in first, second or last page

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Date:   Tue, 22 Jan 2019 13:09:41 +0000
From:   Schrempf Frieder <frieder.schrempf@...tron.de>
To:     "boris.brezillon@...tlin.com" <boris.brezillon@...tlin.com>,
        "miquel.raynal@...tlin.com" <miquel.raynal@...tlin.com>,
        "richard@....at" <richard@....at>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>
Subject: Re: [PATCH v2 0/4] mtd: rawnand: Support bad block markers in first,
 second or last page

On 22.01.19 12:22, Schrempf Frieder wrote:
> From: Frieder Schrempf <frieder.schrempf@...tron.de>
> 
> Currently supported bad block marker positions within the block are:
> * in first page only
> * in last page only
> * in first or second page
> 
> Some ESMT NANDs are known to have been shipped by the manufacturer
> with bad block markers in the first or last page, instead of the
> first or second page.
> 
> Also the datasheets for Cypress/Spansion/AMD NANDs claim that the
> first, second *and* last page needs to be checked.
> 
> Therefore we make it possible to set NAND_BBT_SCAN2NDPAGE and
> NAND_BBT_SCANLASTPAGE at the same time to scan/set all three pages.

In v2 the flags were redefined and are now called NAND_BBM_FIRSTPAGE, 
NAND_BBM_FIRSTPAGE and NAND_BBM_LASTPAGE. I forgot to edit this paragraph.

> 
> This series also contains patches for AMD/Spansion/Cypress and ESMT
> chips to enable both flags at the same time.
> ---
> Changes in v2:
> ==============
> * Rebase on 5.0-rc1
> * Add patch to move bad block marker position info to a common place and
>    rename/prepare existing flags
> * improve/rename function nand_bbm_get_next_page() to use new flags
> ---
> Frieder Schrempf (4):
>    mtd: nand: Always store info about bad block markers in chip struct
>    mtd: rawnand: Support bad block markers in first, second or last page
>    mtd: rawnand: ESMT: Also use the last page for bad block markers
>    mtd: rawnand: AMD: Also use the last page for bad block markers
> 
>   drivers/mtd/nand/onenand/onenand_base.c |  2 +-
>   drivers/mtd/nand/onenand/onenand_bbt.c  |  2 +-
>   drivers/mtd/nand/raw/internals.h        |  1 +
>   drivers/mtd/nand/raw/nand_amd.c         |  8 +++-
>   drivers/mtd/nand/raw/nand_base.c        | 64 +++++++++++++++++--------
>   drivers/mtd/nand/raw/nand_bbt.c         | 28 +++++------
>   drivers/mtd/nand/raw/nand_esmt.c        |  9 +++-
>   drivers/mtd/nand/raw/nand_hynix.c       |  4 +-
>   drivers/mtd/nand/raw/nand_macronix.c    |  2 +-
>   drivers/mtd/nand/raw/nand_micron.c      |  2 +-
>   drivers/mtd/nand/raw/nand_samsung.c     |  4 +-
>   drivers/mtd/nand/raw/nand_toshiba.c     |  2 +-
>   drivers/mtd/nand/raw/sh_flctl.c         |  4 +-
>   include/linux/mtd/bbm.h                 | 14 +-----
>   include/linux/mtd/rawnand.h             | 16 +++++++
>   15 files changed, 100 insertions(+), 62 deletions(-)
>