[PATCH v5 00/52] mtd: rework ECC layout definition
Boris Brezillon
boris.brezillon at free-electrons.com
Wed Mar 30 09:14:15 PDT 2016
Hello,
Hopefully the last version of this patchset (but don't be sad, I'm not
done bothering you with NAND related patches :-)).
If possible, I'd like to have as much Tested/Reviewed/Acked-by tags as
possible, particularly on the changes done in arch/arm and arch/mips
(since the last set of commits depends on those changes, I'd like to
take them in my nand/next branch, even if this imply creating an
immutable branch for the ARM and MIPS maintainers).
If nobody complains about this version, I'll merge it in 4.7.
Here comes the usual description:
This patchset aims at getting rid of the nand_ecclayout limitations.
struct nand_ecclayout is defining fixed eccpos and oobfree arrays which
can only be increased by modifying the MTD_MAX_ECCPOS_ENTRIES_LARGE and
MTD_MAX_OOBFREE_ENTRIES_LARGE macros.
This approach forces us to modify the macro values each time we add a
new NAND chip with a bigger OOB area, and increasing these arrays also
penalize all platforms, even those who only support small NAND devices
(with small OOB area).
The idea to overcome this limitation, is to define the ECC/OOB layout
by the mean of two functions: ->ecc() and ->free(), which will
basically return the same information has those stored in the
nand_ecclayout struct.
Another advantage of this solution is that ECC layouts are usually
following a repetitive pattern (i.e. leave X bytes free and put Y bytes
of ECC per ECC chunk), which allows one to implement the ->ecc()
and ->free() functions with a simple logic that can be applied
to any size of OOB.
Patches 1 to 4 are just cleanups or trivial fixes that can be taken
independently.
Also note that the last two commits are removing the nand_ecclayout
definition, thus preventing any new driver to use this structure.
Of course, this step can be delayed if some of the previous patches
are not accepted.
All those changes are available here [1].
Best Regards,
Boris
[1]https://github.com/bbrezillon/linux-0day/tree/nand/ecclayout
Changes since v4:
- dropped already applied patches
- patch the recently merged qcom driver
Changes since v3:
- fixed two bugs in mtd_ooblayout core implementation
- use ecc->total instead of (ecc->steps * ecc->bytes) in NAND drivers
Changes since v2:
- fixed a few bugs in the core and driver implementations
Changes since v1:
- unified the way of defining ECC and free bytes
- fixed a few bugs in some ->ecc()/->free() implementations
Boris Brezillon (50):
mtd: add mtd_ooblayout_xxx() helper functions
mtd: use mtd_ooblayout_xxx() helpers where appropriate
mtd: nand: core: use mtd_ooblayout_xxx() helpers where appropriate
mtd: nand: atmel: use mtd_ooblayout_xxx() helpers where appropriate
mtd: nand: fsl_ifc: use mtd_ooblayout_xxx() helpers where appropriate
mtd: nand: gpmi: use mtd_ooblayout_xxx() helpers where appropriate
mtd: nand: lpc32xx: use mtd_ooblayout_xxx() helpers where appropriate
mtd: nand: omap2: use mtd_ooblayout_xxx() helpers where appropriate
mtd: nand: qcom: use mtd_ooblayout_xxx() helpers where appropriate
mtd: onenand: use mtd_ooblayout_xxx() helpers where appropriate
mtd: add mtd_set_ecclayout() helper function
mtd: use mtd_set_ecclayout() where appropriate
mtd: nand: use mtd_set_ecclayout() where appropriate
mtd: onenand: use mtd_set_ecclayout() where appropriate
mtd: docg3: use mtd_set_ecclayout() where appropriate
mtd: create an mtd_ooblayout_ops struct to ease ECC layout definition
mtd: docg3: switch to mtd_ooblayout_ops
mtd: nand: implement the default mtd_ooblayout_ops
mtd: nand: bch: switch to mtd_ooblayout_ops
mtd: nand: sharpsl: switch to mtd_ooblayout_ops
mtd: nand: jz4740: switch to mtd_ooblayout_ops
mtd: nand: atmel: switch to mtd_ooblayout_ops
mtd: nand: bf5xx: switch to mtd_ooblayout_ops
mtd: nand: brcm: switch to mtd_ooblayout_ops
mtd: nand: cafe: switch to mtd_ooblayout_ops
mtd: nand: davinci: switch to mtd_ooblayout_ops
mtd: nand: denali: switch to mtd_ooblayout_ops
mtd: nand: diskonchip: switch to mtd_ooblayout_ops
mtd: nand: docg4: switch to mtd_ooblayout_ops
mtd: nand: fsl_elbc: switch to mtd_ooblayout_ops
mtd: nand: fsl_ifc: switch to mtd_ooblayout_ops
mtd: nand: fsmc: switch to mtd_ooblayout_ops
mtd: nand: fsmc: get rid of the fsmc_nand_eccplace struct
mtd: nand: gpmi: switch to mtd_ooblayout_ops
mtd: nand: hisi504: switch to mtd_ooblayout_ops
mtd: nand: jz4780: switch to mtd_ooblayout_ops
mtd: nand: lpc32xx: switch to mtd_ooblayout_ops
mtd: nand: mxc: switch to mtd_ooblayout_ops
mtd: nand: omap2: switch to mtd_ooblayout_ops
mtd: nand: pxa3xx: switch to mtd_ooblayout_ops
mtd: nand: s3c2410: switch to mtd_ooblayout_ops
mtd: nand: sh_flctl: switch to mtd_ooblayout_ops
mtd: nand: sm_common: switch to mtd_ooblayout_ops
mtd: nand: sunxi: switch to mtd_ooblayout_ops
mtd: nand: vf610: switch to mtd_ooblayout_ops
mtd: nand: qcom: switch to mtd_ooblayout_ops
mtd: onenand: switch to mtd_ooblayout_ops
staging: mt29f_spinand: switch to mtd_ooblayout_ops
mtd: nand: kill the ecc->layout field
mtd: kill the nand_ecclayout struct
arch/arm/mach-pxa/spitz.c | 55 +++-
arch/mips/include/asm/mach-jz4740/jz4740_nand.h | 2 +-
arch/mips/jz4740/board-qi_lb60.c | 87 +++---
drivers/mtd/devices/docg3.c | 46 ++-
drivers/mtd/mtdchar.c | 123 ++++++--
drivers/mtd/mtdconcat.c | 2 +-
drivers/mtd/mtdcore.c | 360 ++++++++++++++++++++++++
drivers/mtd/mtdpart.c | 23 +-
drivers/mtd/nand/atmel_nand.c | 130 ++++-----
drivers/mtd/nand/bf5xx_nand.c | 51 ++--
drivers/mtd/nand/brcmnand/brcmnand.c | 258 ++++++++++-------
drivers/mtd/nand/cafe_nand.c | 44 ++-
drivers/mtd/nand/davinci_nand.c | 118 +++-----
drivers/mtd/nand/denali.c | 50 +++-
drivers/mtd/nand/diskonchip.c | 60 +++-
drivers/mtd/nand/docg4.c | 33 ++-
drivers/mtd/nand/fsl_elbc_nand.c | 83 +++---
drivers/mtd/nand/fsl_ifc_nand.c | 244 +++++-----------
drivers/mtd/nand/fsmc_nand.c | 322 ++++++---------------
drivers/mtd/nand/gpmi-nand/gpmi-nand.c | 61 ++--
drivers/mtd/nand/hisi504_nand.c | 26 +-
drivers/mtd/nand/jz4740_nand.c | 2 +-
drivers/mtd/nand/jz4780_nand.c | 19 +-
drivers/mtd/nand/lpc32xx_mlc.c | 50 ++--
drivers/mtd/nand/lpc32xx_slc.c | 58 +++-
drivers/mtd/nand/mxc_nand.c | 212 +++++++-------
drivers/mtd/nand/nand_base.c | 340 +++++++++++-----------
drivers/mtd/nand/nand_bch.c | 27 +-
drivers/mtd/nand/omap2.c | 217 ++++++++------
drivers/mtd/nand/pxa3xx_nand.c | 104 ++++---
drivers/mtd/nand/qcom_nandc.c | 87 +++---
drivers/mtd/nand/s3c2410.c | 32 ++-
drivers/mtd/nand/sh_flctl.c | 87 ++++--
drivers/mtd/nand/sharpsl.c | 2 +-
drivers/mtd/nand/sm_common.c | 93 ++++--
drivers/mtd/nand/sunxi_nand.c | 114 ++++----
drivers/mtd/nand/vf610_nfc.c | 34 +--
drivers/mtd/onenand/onenand_base.c | 235 ++++++++--------
drivers/staging/mt29f_spinand/mt29f_spinand.c | 48 ++--
include/linux/mtd/fsmc.h | 18 --
include/linux/mtd/mtd.h | 63 ++++-
include/linux/mtd/nand.h | 5 +-
include/linux/mtd/onenand.h | 2 -
include/linux/mtd/sharpsl.h | 2 +-
include/uapi/mtd/mtd-abi.h | 2 +-
45 files changed, 2340 insertions(+), 1691 deletions(-)
--
2.5.0
More information about the linux-arm-kernel
mailing list