linux-kernel - [PATCH 00/11] mtd: nand_bbt: introduce independent nand BBT

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Date:	Mon, 14 Mar 2016 02:47:53 +0000
From:	Peter Pan <peterpansjtu@...il.com>
To:	computersforpeace@...il.com, dwmw2@...radead.org,
	boris.brezillon@...e-electrons.com
Cc:	linux-kernel@...r.kernel.org, linux-mtd@...ts.infradead.org,
	karlzhang@...ron.com, beanhuo@...ron.com, xuejiancheng@...wei.com,
	Peter Pan <peterpandong@...ron.com>
Subject: [PATCH 00/11] mtd: nand_bbt: introduce independent nand BBT

Sorry for send the v3 out late. I went through a busy time in the past
two month.

Currently nand_bbt.c is tied with struct nand_chip, and it makes other
NAND family chips hard to use nand_bbt.c. Maybe it's the reason why
onenand has own bbt(onenand_bbt.c).

Separate struct nand_chip from BBT code can make current BBT shareable.
We create struct nand_bbt to take place of nand_chip in nand_bbt.c.
Struct nand_bbt contains all the information BBT needed from outside and
it should be embedded into NAND family chip struct (such as struct nand_chip).

Below is mtd folder structure we want:
	drivers/mtd/nand/<all-nand-core-code>
	drivers/mtd/nand/raw/<raw-nand-controller-drivers>
	drivers/mtd/nand/spi/<spi-nand-code>
	drivers/mtd/nand/onenand/<onenand-code>
	drivers/mtd/nand/chips/<manufacturer-spcific-code>

Most of the patch is borrowed from Brian Norris <computersforpeace@...il.com>.
http://git.infradead.org/users/norris/linux-mtd.git/shortlog/refs/heads/nand-bbt
I decided the authorship of each patch by contribution. Please let me know if
there is something unproper.
Based on Brian's suggestion and Boris's comments, I make 11 independent
patches. Previous patch is http://patchwork.ozlabs.org/patch/492066/
After discussion with Boris and Ezequiel, I realized above structure is better,
so I drop the patch to move nand_bbt.c to mtd folder.

The patch is tested on Zed board.

v3 changes:
	introduce struct nand_bbt_ops
	introduce struct nand_chip_layout_info
	add nand_bbt_create/destroy() API
	use mtd_to_nand instead mtd->priv directly
	remove mark_bad_bbm() due to no user yet
	keep nand_bbt.c in mtd/nand folder
	add nand_get_bbt() helper function
	rebase patch series on 4.5.0-rc1
v2 changes:
	rebase patch series on master branch of l2-mtd.git

Brian Norris (7):
  mtd: nand_bbt: new header for nand family BBT
  mtd: nand_bbt: introduce BBT related data structure
  mtd: nand_bbt: use struct nand_bbt_ops in BBT
  mtd: nand: make nand_erase_nand() static
  mtd: nand_bbt: remove struct nand_chip from nand_bbt.c
  mtd: nand_bbt: remove NAND_BBT_DYNAMICSTRUCT macro
  mtd: nand: remove nand_chip.bbt

Peter Pan (4):
  mtd: nand_bbt: add new API definitions
  mtd: nand_bbt: add nand_bbt_markbad_factory() interface
  mtd: nand: use new BBT API instead of old ones
  mtd: nand_bbt: remove old API definitions

 drivers/mtd/nand/docg4.c     |   7 +-
 drivers/mtd/nand/nand_base.c | 156 ++++++++++-
 drivers/mtd/nand/nand_bbt.c  | 604 +++++++++++++++++++++----------------------
 include/linux/mtd/bbm.h      |  96 +------
 include/linux/mtd/nand.h     |  22 +-
 include/linux/mtd/nand_bbt.h | 190 ++++++++++++++
 6 files changed, 644 insertions(+), 431 deletions(-)
 create mode 100644 include/linux/mtd/nand_bbt.h

-- 
1.9.1