From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756281AbcBDKHc (ORCPT ); Thu, 4 Feb 2016 05:07:32 -0500 Received: from down.free-electrons.com ([37.187.137.238]:33975 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754580AbcBDKHS (ORCPT ); Thu, 4 Feb 2016 05:07:18 -0500 From: Boris Brezillon To: David Woodhouse , Brian Norris , linux-mtd@lists.infradead.org Cc: Daniel Mack , Haojian Zhuang , Robert Jarzmik , Kukjin Kim , Krzysztof Kozlowski , linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Ralf Baechle , linux-mips@linux-mips.org, Josh Wu , Ezequiel Garcia , Maxime Ripard , Chen-Yu Tsai , linux-sunxi@googlegroups.com, Stefan Agner , Kyungmin Park , Greg Kroah-Hartman , devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, punnaiah choudary kalluri , Priit Laes , Boris Brezillon Subject: [PATCH v2 00/51] mtd: rework ECC layout definition Date: Thu, 4 Feb 2016 11:06:23 +0100 Message-Id: <1454580434-32078-1-git-send-email-boris.brezillon@free-electrons.com> X-Mailer: git-send-email 2.1.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 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 Boris Brezillon (51): 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: 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 | 43 ++- 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 | 120 ++++---- 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 | 38 ++- drivers/mtd/nand/docg4.c | 34 ++- drivers/mtd/nand/fsl_elbc_nand.c | 83 +++--- drivers/mtd/nand/fsl_ifc_nand.c | 246 +++++----------- drivers/mtd/nand/fsmc_nand.c | 300 ++++++-------------- drivers/mtd/nand/gpmi-nand/gpmi-nand.c | 61 ++-- drivers/mtd/nand/hisi504_nand.c | 28 +- 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 | 334 +++++++++++----------- 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 | 254 ++++++++--------- drivers/mtd/tests/oobtest.c | 49 ++-- drivers/staging/mt29f_spinand/mt29f_spinand.c | 49 ++-- fs/jffs2/wbuf.c | 6 +- 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 +- 47 files changed, 2349 insertions(+), 1684 deletions(-) -- 2.1.4