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Date: Wed, 30 Mar 2016 18:14:15 +0200 From: Boris Brezillon <boris.brezillon@...e-electrons.com> To: David Woodhouse <dwmw2@...radead.org>, Brian Norris <computersforpeace@...il.com>, linux-mtd@...ts.infradead.org, Boris Brezillon <boris.brezillon@...e-electrons.com>, Richard Weinberger <richard@....at> Cc: Daniel Mack <daniel@...que.org>, Haojian Zhuang <haojian.zhuang@...il.com>, Robert Jarzmik <robert.jarzmik@...e.fr>, Kukjin Kim <kgene@...nel.org>, Krzysztof Kozlowski <k.kozlowski@...sung.com>, linux-samsung-soc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, Ralf Baechle <ralf@...ux-mips.org>, linux-mips@...ux-mips.org, Nicolas Ferre <nicolas.ferre@...el.com>, Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>, Alexandre Belloni <alexandre.belloni@...e-electrons.com>, Wenyou Yang <wenyou.yang@...el.com>, Josh Wu <rainyfeeling@...look.com>, Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>, Maxime Ripard <maxime.ripard@...e-electrons.com>, Chen-Yu Tsai <wens@...e.org>, linux-sunxi@...glegroups.com, Stefan Agner <stefan@...er.ch>, Kyungmin Park <kyungmin.park@...sung.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org, punnaiah choudary kalluri <punnaia@...inx.com>, Priit Laes <plaes@...es.org>, Kamal Dasu <kdasu.kdev@...il.com>, bcm-kernel-feedback-list@...adcom.com, linux-api@...r.kernel.org, Harvey Hunt <harvey.hunt@...tec.com>, Archit Taneja <architt@...eaurora.org>, Han Xu <b45815@...escale.com>, Huang Shijie <shijie.huang@....com> Subject: [PATCH v5 00/52] mtd: rework ECC layout definition 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
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