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Groups > linux.kernel > #1343640
| From | Boris Brezillon <boris.brezillon@free-electrons.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v3 00/52] mtd: rework ECC layout definition |
| Date | 2016-02-26 02:00 +0100 |
| Message-ID | <r6eVb-3Cr-3@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
Hello, 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. Best Regards, Boris 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 - added new helpers to ease ECC and free bytes manipulation - separated driver changes in different commits to ease review - dropped already applied patches *** BLURB HERE *** Boris Brezillon (52): mtd: kill the ecclayout->oobavail field mtd: create an mtd_oobavail() helper and make use of it mtd: mtdswap: remove useless if (!mtd->ecclayout) test mtd: nand: simplify nand_bch_init() usage 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: 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: 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 | 51 +++- drivers/mtd/mtdchar.c | 123 ++++++-- drivers/mtd/mtdconcat.c | 2 +- drivers/mtd/mtdcore.c | 358 ++++++++++++++++++++++++ drivers/mtd/mtdpart.c | 28 +- drivers/mtd/mtdswap.c | 24 +- drivers/mtd/nand/atmel_nand.c | 130 ++++----- drivers/mtd/nand/bf5xx_nand.c | 51 ++-- drivers/mtd/nand/brcmnand/brcmnand.c | 262 ++++++++++------- drivers/mtd/nand/cafe_nand.c | 45 ++- drivers/mtd/nand/davinci_nand.c | 118 +++----- drivers/mtd/nand/denali.c | 51 +++- drivers/mtd/nand/diskonchip.c | 60 +++- drivers/mtd/nand/docg4.c | 34 ++- drivers/mtd/nand/fsl_elbc_nand.c | 83 +++--- drivers/mtd/nand/fsl_ifc_nand.c | 245 +++++----------- drivers/mtd/nand/fsmc_nand.c | 322 ++++++--------------- drivers/mtd/nand/gpmi-nand/gpmi-nand.c | 61 ++-- drivers/mtd/nand/hisi504_nand.c | 27 +- 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 | 344 ++++++++++++----------- drivers/mtd/nand/nand_bch.c | 46 ++- drivers/mtd/nand/omap2.c | 241 +++++++++------- drivers/mtd/nand/pxa3xx_nand.c | 104 ++++--- 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 | 262 ++++++++--------- drivers/mtd/tests/oobtest.c | 49 ++-- drivers/staging/mt29f_spinand/mt29f_spinand.c | 49 ++-- fs/jffs2/wbuf.c | 6 +- include/linux/mtd/fsmc.h | 18 -- include/linux/mtd/mtd.h | 69 ++++- include/linux/mtd/nand.h | 5 +- include/linux/mtd/nand_bch.h | 8 +- include/linux/mtd/onenand.h | 2 - include/linux/mtd/sharpsl.h | 2 +- include/uapi/mtd/mtd-abi.h | 2 +- 48 files changed, 2375 insertions(+), 1754 deletions(-) -- 2.1.4
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[PATCH v3 00/52] mtd: rework ECC layout definition Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:00 +0100
[PATCH v3 04/52] mtd: nand: simplify nand_bch_init() usage Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:00 +0100
[PATCH v3 01/52] mtd: kill the ecclayout->oobavail field Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:00 +0100
[PATCH v3 05/52] mtd: add mtd_ooblayout_xxx() helper functions Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:00 +0100
[PATCH v3 03/52] mtd: mtdswap: remove useless if (!mtd->ecclayout) test Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:00 +0100
[PATCH v3 02/52] mtd: create an mtd_oobavail() helper and make use of it Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:00 +0100
[PATCH v3 11/52] mtd: nand: lpc32xx: use mtd_ooblayout_xxx() helpers where appropriate Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 22/52] mtd: nand: bch: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 28/52] mtd: nand: cafe: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 40/52] mtd: nand: lpc32xx: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 24/52] mtd: nand: jz4740: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 20/52] mtd: docg3: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 36/52] mtd: nand: fsmc: get rid of the fsmc_nand_eccplace struct Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 21/52] mtd: nand: implement the default mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 16/52] mtd: nand: use mtd_set_ecclayout() where appropriate Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 19/52] mtd: create an mtd_ooblayout_ops struct to ease ECC layout definition Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 12/52] mtd: nand: omap2: use mtd_ooblayout_xxx() helpers where appropriate Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 15/52] mtd: use mtd_set_ecclayout() where appropriate Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 26/52] mtd: nand: bf5xx: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 27/52] mtd: nand: brcm: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 44/52] mtd: nand: s3c2410: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 13/52] mtd: onenand: use mtd_ooblayout_xxx() helpers where appropriate Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 45/52] mtd: nand: sh_flctl: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 25/52] mtd: nand: atmel: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 31/52] mtd: nand: diskonchip: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 34/52] mtd: nand: fsl_ifc: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 41/52] mtd: nand: mxc: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 42/52] mtd: nand: omap2: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 43/52] mtd: nand: pxa3xx: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 32/52] mtd: nand: docg4: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 14/52] mtd: add mtd_set_ecclayout() helper function Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 23/52] mtd: nand: sharpsl: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 39/52] mtd: nand: jz4780: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
Re: [PATCH v3 39/52] mtd: nand: jz4780: switch to mtd_ooblayout_ops Harvey Hunt <harvey.hunt@imgtec.com> - 2016-02-29 11:50 +0100
[PATCH v3 29/52] mtd: nand: davinci: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 30/52] mtd: nand: denali: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 17/52] mtd: onenand: use mtd_set_ecclayout() where appropriate Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 18/52] mtd: docg3: use mtd_set_ecclayout() where appropriate Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 33/52] mtd: nand: fsl_elbc: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:10 +0100
[PATCH v3 48/52] mtd: nand: vf610: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:20 +0100
Re: [PATCH v3 48/52] mtd: nand: vf610: switch to mtd_ooblayout_ops Stefan Agner <stefan@agner.ch> - 2016-02-26 20:50 +0100
Re: [PATCH v3 48/52] mtd: nand: vf610: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 21:50 +0100
[PATCH v3 38/52] mtd: nand: hisi504: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:20 +0100
[PATCH v3 06/52] mtd: use mtd_ooblayout_xxx() helpers where appropriate Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:20 +0100
[PATCH v3 52/52] mtd: kill the nand_ecclayout struct Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:20 +0100
[PATCH v3 47/52] mtd: nand: sunxi: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:20 +0100
[PATCH v3 51/52] mtd: nand: kill the ecc->layout field Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:20 +0100
[PATCH v3 49/52] mtd: onenand: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:20 +0100
[PATCH v3 46/52] mtd: nand: sm_common: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:20 +0100
[PATCH v3 37/52] mtd: nand: gpmi: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:20 +0100
[PATCH v3 50/52] staging: mt29f_spinand: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:20 +0100
[PATCH v3 35/52] mtd: nand: fsmc: switch to mtd_ooblayout_ops Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 02:20 +0100
Re: [PATCH v3 00/52] mtd: rework ECC layout definition Stefan Agner <stefan@agner.ch> - 2016-02-26 02:40 +0100
Re: [PATCH v3 00/52] mtd: rework ECC layout definition Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-02-26 03:50 +0100
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