From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Richard Weinberger <richard@nod.at>,
David Woodhouse <dwmw2@infradead.org>,
Brian Norris <computersforpeace@gmail.com>,
Marek Vasut <marek.vasut@gmail.com>,
Tudor Ambarus <Tudor.Ambarus@microchip.com>,
Vignesh Raghavendra <vigneshr@ti.com>
Cc: Tudor Ambarus <tudor.ambarus@microchip.com>,
Julien Su <juliensu@mxic.com.tw>,
Schrempf Frieder <frieder.schrempf@kontron.de>,
Paul Cercueil <paul@crapouillou.net>,
Boris Brezillon <boris.brezillon@collabora.com>,
linux-mtd@lists.infradead.org,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Mason Yang <masonccyang@mxic.com.tw>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 00/40] Introduce the generic ECC engine abstraction
Date: Thu, 19 Sep 2019 21:31:00 +0200 [thread overview]
Message-ID: <20190919193141.7865-1-miquel.raynal@bootlin.com> (raw)
As of today, only raw NAND controllers used to feature an integrated
ECC engine and so controller drivers always embedded some code to
enable/disable the correction.
This statement is no longer correct as SPI-NAND devices might not
embed an on-die ECC engine and must make use of an external ECC
engine. We figured there are three possible situations for (generic)
NAND devices: either the engine is 'on-die' (most of the SPI-NANDs, a
few raw NANDs), or the engine is part of the host controller (most raw
NANDs), or the engine may be external (SPI controllers might feature
an hardware ECC engine, otherwise software correction can also be
used).
To solve this situation, this is a proposal on how to make things
work. We want to create an ECC engine object which has simple
callbacks:
* init/cleanup its context
* prepare an I/O operation
* finish an I/O operation
Details about what is going to happen in these callbacks is described
in drivers/mtd/nand/ecc/engine.c.
The logic in this series is:
1/ Use the generic NAND core for all NAND devices (raw and SPI).
2/ Create the ECC engine interface in drivers/mtd/nand/ecc.c
3/ Move code in driver/mtd/nand/ecc.c
4/ Make both software engines (Hamming and BCH) generic, move them in
the ecc/ directory, clean them a bit and instantiate ECC
engines. Write raw NAND helpers to use these two new engines.
5/ Isolate SPI-NAND on-die ECC engine in its own driver.
6/ Make use from the SPI-NAND layer of all the ECC engines listed
above (on user request, people can now make use of soft BCH if they
don't have an ECC-engine).
7/ Extend the logic to hardware external engines. A proposal of a
driver for Macronix external ECC engine will follow in another
series.
This work is now almost ready, the next steps are:
1/ Migrate the raw NAND core to make a proper use of these ECC
engines.
2/ Deprecate in the raw NAND subsystem the interfaces used until now
(I expect we should get rid of a lot of boilerplate).
Thanks,
Miquèl
Changes in v3
=============
* Added Boris' Reviewed-by tags.
* Added a kernel doc header on the nand_page_io_req enumeration.
* Added support for HW engines.
* Droped the patch clarifying the value of the first entry in
enumerations (which is always 0).
* Rename the nand_ecc_conf structure as nand_ecc_props because the
_conf suffix implies that it is possible to edit it, while in some
cases (eg. on-die ECC) there is nothing to tweak.
* Smoother introduction of the ECC engine abstraction.
* Renamed the ECC engine module nand_ecc_engine.ko.
* Moved all the ECC files into drivers/mtd/nand/. Forgot the ecc/
subdirectory.
* Added a new series to drop the ECC mode enumeration wich mixes the
provider (none, hw, sw, on-die) and the OOB placement (first,
syndrome).
* Various typos fixed.
* Added a few patches to fix bugs found in SPI-NAND/mtdchar.c.
* Introduced the external hardware ECC engine boilerplate.
Changes in v2
=============
* SPDX license identifiers for soft BCH and Hamming: the license macro
was right, "GPL" means "GPLv2 or higher", so do not change this
portion. Also update the commit messages to fit the actual change.
* Do not compile-in the NAND core by default, do it only for raw
NAND. Remove the dependencies on CONFIG_MTD in a different
patch. Also, keep an extra level of hierarchy in Kconfig for the
NAND bits by adding a menu instead of a config.
* Moved the standard OOB layouts in the ecc/engine.c driver instead of
in the NAND core.
* Used the nand_ecc_ prefix in most of the engines functions instead
of just ecc_, which is now reserved for bare helpers. Get rid of the
__ecc prefix.
* In the sunxi NAND controller driver: moved the ECC structure from
sunxi_nfc to sunxi_nand_chip as the ECC engine is per-chip and not
per controller.
* Software Hamming ECC engine is only enabled by default if raw NAND
is also enabled. NDFC now selects the software Hamming ECC engine
(instead of depending on it).
* Mention in software BCH and Hamming Kconfig entries that booting
from NAND is very likely to fail if the user selects these symbols
as modules.
* Added Boris Reviewed-by tag on the SPI-NAND typo fixing patch.
* Renamed the "mode" into a "provider" entry in the ECC configuration
structures.
* Moved the "total" entry of the ECC configuration directly in the
context structure (should probably not be public but let's keep it
as is for now).
* Split the generic ECC engine introduction into smaller patches to do
some renaming aside.
* Drop the "maximize" entry in the ECC engine configuration structure,
keep using a flag like before.
* Canceled the move of the SPI-NAND specific ECC engine out of the
core file.
* Amended the root ECC structures to have three nand_ecc_conf
structures: one for the defaults, one for the chip requirements, one
for the user desires.
* Created a *ondie_engine pointer in the nand_ecc structure to save
the on-die ECC engine, if any. For instance, saving a reference to
this engine is done by the SPI-NAND core.
* Dropped the SPI-NAND flag that was used to distinguish between NAND
flavors from the NAND core, it should not be needed anymore.
* Added an helper in the NAND core to put a reference on an ECC
engine. This will be used by the hardware engines only.
* Renamed the files ecc/sw-{bch,hamming}.c and their headers
include/linux/mtd/nand-ecc-sw-{bch,hamming}-engine.h.
* Created a MTD_NAND_ECC invisible Kconfig symbol.
* Added plenty of missing EXPORT_SYMBOL{,_GPL}().
* Minor modifications so that everything still compiles even when
modules and built-in drivers are mixed in Kconfig in the whole NAND
directory.
Miquel Raynal (40):
mtd: rawnand: Avoid a typedef
mtd: rawnand: Add an invalid ECC mode to discriminate with valid ones
mtd: rawnand: Create a new enumeration to describe OOB placement
mtd: rawnand: Separate the ECC engine type and the OOB placement
mtd: rawnand: Create a new enumeration to describe properly ECC types
mtd: rawnand: Use the new ECC engine type enumeration
mtd: rawnand: Drop the legacy ECC type enumeration
mtd: nand: Move nand_device forward declaration to the top
mtd: nand: Add an extra level in the Kconfig hierarchy
mtd: nand: Drop useless 'depends on' in Kconfig
mtd: nand: Add a NAND page I/O request type
mtd: nand: Rename a core structure
mtd: nand: Add more parameters to the nand_ecc_props structure
mtd: nand: Introduce the ECC engine abstraction
mtd: nand: Convert the generic NAND layer to the generic ECC framework
mtd: Fix typo in mtd_ooblayout_set_databytes() description
mtd: nand: Move standard OOB layouts to the generic ECC core
mtd: nand: Move ECC specific functions to the ECC core
mtd: nand: ecc: Turn the software BCH implementation generic
mtd: rawnand: Get rid of chip->ecc.priv
mtd: nand: ecc: Move Hamming code to the generic NAND layer
mtd: nand: ecc: Clarify the software Hamming introductory line
mtd: nand: ecc: Turn the software Hamming implementation generic
mtd: nand: Remove useless include about software Hamming ECC
mtd: nand: ecc: Let the software Hamming ECC engine be unselected
mtd: nand: ecc: Create the software BCH engine instance
mtd: nand: ecc: Create the software Hamming engine instance
mtd: nand: Let software ECC engines be retrieved from the NAND core
mtd: spinand: Fix typo in comment
mtd: spinand: Move ECC related definitions earlier in the driver
mtd: spinand: Instantiate a SPI-NAND on-die ECC engine
mtd: nand: Let on-die ECC engines be retrieved from the NAND core
mtd: rawnand: Fill a default ECC provider/algorithm
mtd: spinand: Fill a default ECC provider/algorithm
mtd: nand: Add helpers to manage ECC engines and configurations
mtd: spinand: Use the external ECC engine logic
mtd: spinand: Propagate ECC information to the MTD structure
mtd: spinand: Allow the case where there is no ECC engine
mtd: spinand: Fix OOB read
mtd: nand: ecc: Add infrastructure to support hardware engines
arch/arm/mach-davinci/board-da830-evm.c | 2 +-
arch/arm/mach-davinci/board-da850-evm.c | 2 +-
arch/arm/mach-davinci/board-dm355-evm.c | 2 +-
arch/arm/mach-davinci/board-dm355-leopard.c | 3 +-
arch/arm/mach-davinci/board-dm365-evm.c | 2 +-
arch/arm/mach-davinci/board-dm644x-evm.c | 2 +-
arch/arm/mach-davinci/board-dm646x-evm.c | 2 +-
arch/arm/mach-davinci/board-mityomapl138.c | 2 +-
arch/arm/mach-davinci/board-neuros-osd2.c | 2 +-
arch/arm/mach-davinci/board-omapl138-hawk.c | 2 +-
arch/arm/mach-s3c24xx/common-smdk.c | 3 +-
arch/arm/mach-s3c24xx/mach-anubis.c | 3 +-
arch/arm/mach-s3c24xx/mach-at2440evb.c | 3 +-
arch/arm/mach-s3c24xx/mach-bast.c | 3 +-
arch/arm/mach-s3c24xx/mach-gta02.c | 3 +-
arch/arm/mach-s3c24xx/mach-jive.c | 3 +-
arch/arm/mach-s3c24xx/mach-mini2440.c | 3 +-
arch/arm/mach-s3c24xx/mach-osiris.c | 3 +-
arch/arm/mach-s3c24xx/mach-qt2410.c | 3 +-
arch/arm/mach-s3c24xx/mach-rx1950.c | 2 +-
arch/arm/mach-s3c24xx/mach-rx3715.c | 3 +-
arch/arm/mach-s3c24xx/mach-vstms.c | 3 +-
arch/arm/mach-s3c64xx/mach-hmt.c | 2 +-
arch/arm/mach-s3c64xx/mach-mini6410.c | 2 +-
arch/arm/mach-s3c64xx/mach-real6410.c | 2 +-
drivers/mtd/mtdcore.c | 2 +-
drivers/mtd/nand/Kconfig | 43 ++
drivers/mtd/nand/Makefile | 4 +
drivers/mtd/nand/core.c | 128 ++++
drivers/mtd/nand/ecc-sw-bch.c | 423 +++++++++++
.../nand/{raw/nand_ecc.c => ecc-sw-hamming.c} | 331 +++++++--
drivers/mtd/nand/ecc.c | 614 ++++++++++++++++
drivers/mtd/nand/onenand/Kconfig | 1 -
drivers/mtd/nand/raw/Kconfig | 25 +-
drivers/mtd/nand/raw/Makefile | 2 -
drivers/mtd/nand/raw/ams-delta.c | 2 +-
drivers/mtd/nand/raw/atmel/nand-controller.c | 22 +-
drivers/mtd/nand/raw/au1550nd.c | 2 +-
.../mtd/nand/raw/bcm47xxnflash/ops_bcm4706.c | 2 +-
drivers/mtd/nand/raw/brcmnand/brcmnand.c | 4 +-
drivers/mtd/nand/raw/cafe_nand.c | 3 +-
drivers/mtd/nand/raw/cmx270_nand.c | 2 +-
drivers/mtd/nand/raw/cs553x_nand.c | 5 +-
drivers/mtd/nand/raw/davinci_nand.c | 22 +-
drivers/mtd/nand/raw/denali.c | 6 +-
drivers/mtd/nand/raw/diskonchip.c | 3 +-
drivers/mtd/nand/raw/fsl_elbc_nand.c | 13 +-
drivers/mtd/nand/raw/fsl_ifc_nand.c | 7 +-
drivers/mtd/nand/raw/fsl_upm.c | 3 +-
drivers/mtd/nand/raw/fsmc_nand.c | 13 +-
drivers/mtd/nand/raw/gpio.c | 2 +-
drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c | 14 +-
drivers/mtd/nand/raw/hisi504_nand.c | 6 +-
.../mtd/nand/raw/ingenic/ingenic_nand_drv.c | 10 +-
drivers/mtd/nand/raw/ingenic/jz4740_nand.c | 3 +-
drivers/mtd/nand/raw/lpc32xx_mlc.c | 3 +-
drivers/mtd/nand/raw/lpc32xx_slc.c | 6 +-
drivers/mtd/nand/raw/marvell_nand.c | 21 +-
drivers/mtd/nand/raw/meson_nand.c | 2 +-
drivers/mtd/nand/raw/mpc5121_nfc.c | 2 +-
drivers/mtd/nand/raw/mtk_nand.c | 8 +-
drivers/mtd/nand/raw/mxc_nand.c | 20 +-
drivers/mtd/nand/raw/nand_base.c | 687 +++++++-----------
drivers/mtd/nand/raw/nand_bch.c | 218 ------
drivers/mtd/nand/raw/nand_esmt.c | 11 +-
drivers/mtd/nand/raw/nand_hynix.c | 41 +-
drivers/mtd/nand/raw/nand_jedec.c | 4 +-
drivers/mtd/nand/raw/nand_micron.c | 18 +-
drivers/mtd/nand/raw/nand_onfi.c | 8 +-
drivers/mtd/nand/raw/nand_samsung.c | 19 +-
drivers/mtd/nand/raw/nand_toshiba.c | 15 +-
drivers/mtd/nand/raw/nandsim.c | 7 +-
drivers/mtd/nand/raw/ndfc.c | 5 +-
drivers/mtd/nand/raw/nuc900_nand.c | 2 +-
drivers/mtd/nand/raw/omap2.c | 50 +-
drivers/mtd/nand/raw/orion_nand.c | 2 +-
drivers/mtd/nand/raw/pasemi_nand.c | 3 +-
drivers/mtd/nand/raw/plat_nand.c | 2 +-
drivers/mtd/nand/raw/qcom_nandc.c | 2 +-
drivers/mtd/nand/raw/r852.c | 3 +-
drivers/mtd/nand/raw/s3c2410.c | 9 +-
drivers/mtd/nand/raw/sh_flctl.c | 4 +-
drivers/mtd/nand/raw/sharpsl.c | 5 +-
drivers/mtd/nand/raw/socrates_nand.c | 2 +-
drivers/mtd/nand/raw/stm32_fmc2_nand.c | 8 +-
drivers/mtd/nand/raw/sunxi_nand.c | 53 +-
drivers/mtd/nand/raw/tango_nand.c | 2 +-
drivers/mtd/nand/raw/tegra_nand.c | 14 +-
drivers/mtd/nand/raw/tmio_nand.c | 9 +-
drivers/mtd/nand/raw/txx9ndfmc.c | 7 +-
drivers/mtd/nand/raw/vf610_nfc.c | 4 +-
drivers/mtd/nand/raw/xway_nand.c | 2 +-
drivers/mtd/nand/spi/Kconfig | 1 +
drivers/mtd/nand/spi/core.c | 300 +++++---
drivers/mtd/nand/spi/macronix.c | 6 +-
drivers/mtd/nand/spi/on-die-ecc-engine.c | 0
drivers/mtd/nand/spi/toshiba.c | 6 +-
drivers/mtd/sm_ftl.c | 30 +-
drivers/mtd/tests/mtd_nandecctest.c | 31 +-
include/linux/mtd/nand-ecc-sw-bch.h | 80 ++
include/linux/mtd/nand-ecc-sw-hamming.h | 99 +++
include/linux/mtd/nand.h | 188 ++++-
include/linux/mtd/nand_bch.h | 66 --
include/linux/mtd/nand_ecc.h | 39 -
include/linux/mtd/rawnand.h | 48 +-
include/linux/mtd/sharpsl.h | 1 -
include/linux/mtd/spinand.h | 13 +-
include/linux/platform_data/mtd-davinci.h | 9 +-
.../linux/platform_data/mtd-nand-s3c2410.h | 2 +-
109 files changed, 2650 insertions(+), 1326 deletions(-)
create mode 100644 drivers/mtd/nand/ecc-sw-bch.c
rename drivers/mtd/nand/{raw/nand_ecc.c => ecc-sw-hamming.c} (60%)
create mode 100644 drivers/mtd/nand/ecc.c
delete mode 100644 drivers/mtd/nand/raw/nand_bch.c
create mode 100644 drivers/mtd/nand/spi/on-die-ecc-engine.c
create mode 100644 include/linux/mtd/nand-ecc-sw-bch.h
create mode 100644 include/linux/mtd/nand-ecc-sw-hamming.h
delete mode 100644 include/linux/mtd/nand_bch.h
delete mode 100644 include/linux/mtd/nand_ecc.h
--
2.20.1
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next reply other threads:[~2019-09-19 19:31 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-19 19:31 Miquel Raynal [this message]
2019-09-19 19:31 ` [PATCH v3 01/40] mtd: rawnand: Avoid a typedef Miquel Raynal
2019-10-12 8:41 ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 02/40] mtd: rawnand: Add an invalid ECC mode to discriminate with valid ones Miquel Raynal
2019-10-12 8:48 ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 03/40] mtd: rawnand: Create a new enumeration to describe OOB placement Miquel Raynal
2019-10-12 9:02 ` Boris Brezillon
2019-10-12 9:07 ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 04/40] mtd: rawnand: Separate the ECC engine type and the " Miquel Raynal
2019-10-12 9:05 ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 05/40] mtd: rawnand: Create a new enumeration to describe properly ECC types Miquel Raynal
2019-10-12 9:14 ` Boris Brezillon
2020-01-15 20:58 ` Miquel Raynal
2019-10-12 9:55 ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 06/40] mtd: rawnand: Use the new ECC engine type enumeration Miquel Raynal
2019-10-12 9:15 ` Boris Brezillon
2019-10-12 9:17 ` Boris Brezillon
2019-10-12 9:28 ` Boris Brezillon
2020-01-15 10:33 ` Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 07/40] mtd: rawnand: Drop the legacy ECC " Miquel Raynal
2019-10-12 9:29 ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 08/40] mtd: nand: Move nand_device forward declaration to the top Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 09/40] mtd: nand: Add an extra level in the Kconfig hierarchy Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 10/40] mtd: nand: Drop useless 'depends on' in Kconfig Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 11/40] mtd: nand: Add a NAND page I/O request type Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 12/40] mtd: nand: Rename a core structure Miquel Raynal
2019-10-12 9:35 ` Boris Brezillon
2020-01-16 8:53 ` Miquel Raynal
2020-01-16 9:12 ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 13/40] mtd: nand: Add more parameters to the nand_ecc_props structure Miquel Raynal
2019-10-12 9:37 ` Boris Brezillon
2020-01-16 8:59 ` Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 14/40] mtd: nand: Introduce the ECC engine abstraction Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 15/40] mtd: nand: Convert the generic NAND layer to the generic ECC framework Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 16/40] mtd: Fix typo in mtd_ooblayout_set_databytes() description Miquel Raynal
2019-10-12 10:58 ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 17/40] mtd: nand: Move standard OOB layouts to the generic ECC core Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 18/40] mtd: nand: Move ECC specific functions to the " Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 19/40] mtd: nand: ecc: Turn the software BCH implementation generic Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 20/40] mtd: rawnand: Get rid of chip->ecc.priv Miquel Raynal
2019-09-20 6:18 ` Maxime Ripard
2019-09-19 19:31 ` [PATCH v3 21/40] mtd: nand: ecc: Move Hamming code to the generic NAND layer Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 22/40] mtd: nand: ecc: Clarify the software Hamming introductory line Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 23/40] mtd: nand: ecc: Turn the software Hamming implementation generic Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 24/40] mtd: nand: Remove useless include about software Hamming ECC Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 25/40] mtd: nand: ecc: Let the software Hamming ECC engine be unselected Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 26/40] mtd: nand: ecc: Create the software BCH engine instance Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 27/40] mtd: nand: ecc: Create the software Hamming " Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 28/40] mtd: nand: Let software ECC engines be retrieved from the NAND core Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 29/40] mtd: spinand: Fix typo in comment Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 30/40] mtd: spinand: Move ECC related definitions earlier in the driver Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 31/40] mtd: spinand: Instantiate a SPI-NAND on-die ECC engine Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 32/40] mtd: nand: Let on-die ECC engines be retrieved from the NAND core Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 33/40] mtd: rawnand: Fill a default ECC provider/algorithm Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 34/40] mtd: spinand: " Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 35/40] mtd: nand: Add helpers to manage ECC engines and configurations Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 36/40] mtd: spinand: Use the external ECC engine logic Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 37/40] mtd: spinand: Propagate ECC information to the MTD structure Miquel Raynal
2020-02-17 13:27 ` Emil Lenngren
2020-02-17 13:31 ` Boris Brezillon
2019-09-19 19:31 ` [PATCH v3 38/40] mtd: spinand: Allow the case where there is no ECC engine Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 39/40] mtd: spinand: Fix OOB read Miquel Raynal
2019-09-19 19:31 ` [PATCH v3 40/40] mtd: nand: ecc: Add infrastructure to support hardware engines Miquel Raynal
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