From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_2 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DE390C433E0 for ; Tue, 26 May 2020 23:22:11 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A955E206D5 for ; Tue, 26 May 2020 23:22:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="k8ieUmWA" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A955E206D5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=collabora.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=jit5W1n7jsR1U+abvXm2IN4VvG1BY4/TYKUznS5mTv0=; b=k8ieUmWA6mmcl7 HSWYom2xfdhs4QLCE/2GiISo/xChnFBss3dz7L9bE8taU/AryjpITf1dwsRI6KTz7kf2SC+hjCkIr qNdcyMHfUVmo2OjwsdkqvlufVQx2bHobG5gPQIFYOhXNoGN35Qc4AUiTY/Nzpij866Kjm0MJ/u53C 37QsoUpDMoQg9LZRq4/oRseHsXXWAk5x/jzpC04Q4GJ+SIEHSphVTTS2JDVdBonfx64f531Y/OhFU vLIvOvNPtbSX3rQ1OtLr0k+e0uyb/NkOIAmL2JeY/BNaB+C6nANQ/fiEuiRJaKzYBYk/5xvgxAr75 KnMzu3qbr6Uz1QLajGnQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jditU-0000Ek-I4; Tue, 26 May 2020 23:22:00 +0000 Received: from bhuna.collabora.co.uk ([2a00:1098:0:82:1000:25:2eeb:e3e3]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jditQ-0000Dn-Ub for linux-mtd@lists.infradead.org; Tue, 26 May 2020 23:21:58 +0000 Received: from localhost (unknown [IPv6:2a01:e0a:2c:6930:b93f:9fae:b276:a89a]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: bbrezillon) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id DE40D2A3151; Wed, 27 May 2020 00:21:54 +0100 (BST) Date: Wed, 27 May 2020 01:21:48 +0200 From: Boris Brezillon To: Miquel Raynal Subject: Re: [RESEND v5 09/21] mtd: rawnand: Create a new enumeration to describe properly ECC types Message-ID: <20200527012148.5b68ce4e@collabora.com> In-Reply-To: <20200527005518.2d780ecc@collabora.com> References: <20200526195633.11543-1-miquel.raynal@bootlin.com> <20200526195633.11543-10-miquel.raynal@bootlin.com> <20200527005518.2d780ecc@collabora.com> Organization: Collabora X-Mailer: Claws Mail 3.17.5 (GTK+ 2.24.32; x86_64-redhat-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200526_162157_112704_06A67E91 X-CRM114-Status: GOOD ( 21.11 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Vignesh Raghavendra , Tudor Ambarus , Richard Weinberger , Rob Herring , linux-mtd@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org On Wed, 27 May 2020 00:55:18 +0200 Boris Brezillon wrote: > On Tue, 26 May 2020 21:56:21 +0200 > Miquel Raynal wrote: > > > Now that the misleading mix between ECC engine type and OOB placement > > has been addressed, add a new enumeration to properly define ECC types > > (also called provider or mode). > > Let's pick a name and stick to it. I think "ECC provider type" or > "ECC engine type" are good names. Okay, I think I remember now where the 'ECC provider' concept comes from. IIRC, the property will be used to select one ECC engine among possibly more than one choice: there are systems with both on-controller and on-die ECC engines, and you can always decide to use the SW implementation of course. > > > > > Signed-off-by: Miquel Raynal > > Reviewed-by: Boris Brezillon > > --- > > drivers/mtd/nand/raw/nand_base.c | 7 +++++++ > > include/linux/mtd/rawnand.h | 16 ++++++++++++++++ > > 2 files changed, 23 insertions(+) > > > > diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c > > index 515cd4681660..5c6ab5b93270 100644 > > --- a/drivers/mtd/nand/raw/nand_base.c > > +++ b/drivers/mtd/nand/raw/nand_base.c > > @@ -5018,6 +5018,13 @@ static const char * const nand_ecc_modes[] = { > > [NAND_ECC_ON_DIE] = "on-die", > > }; > > > > +static const char * const nand_ecc_engine_providers[] = { > > I'd rename that one nand_ecc_engine_types or nand_ecc_provider_types. > > > + [NAND_ECC_ENGINE_NONE] = "none", > > + [NAND_ECC_ENGINE_SOFT] = "soft", > > + [NAND_ECC_ENGINE_CONTROLLER] = "hw", > > + [NAND_ECC_ENGINE_ON_DIE] = "on-die", > > +}; > > + > > static const char * const nand_ecc_placement[] = { > > [NAND_ECC_PLACEMENT_INTERLEAVED] = "interleaved", > > }; > > diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h > > index dc909fb977c7..a2078c5f3d21 100644 > > --- a/include/linux/mtd/rawnand.h > > +++ b/include/linux/mtd/rawnand.h > > @@ -92,6 +92,22 @@ enum nand_ecc_mode { > > NAND_ECC_ON_DIE, > > }; > > > > +/** > > + * enum nand_ecc_engine_type - NAND ECC engine type/provider > > + * @NAND_ECC_ENGINE_INVALID: Invalid value > > + * @NAND_ECC_ENGINE_NONE: No ECC correction > > + * @NAND_ECC_ENGINE_SOFT: Software ECC correction > > + * @NAND_ECC_ENGINE_CONTROLLER: Hardware controller ECC correction > > + * @NAND_ECC_ENGINE_ON_DIE: On chip hardware ECC correction > > + */ > > +enum nand_ecc_engine_type { > > Looks like you went for ecc_engine_type here, so let's stick to that. > > > + NAND_ECC_ENGINE_INVALID, > > NAND_ECC_ENGINE_TYPE_xxx > > > + NAND_ECC_ENGINE_NONE, > > Do we really need a value for NONE? I'd expect the engine type to be > applicable to NAND that have some sort of ECC engine connected to them. > > > + NAND_ECC_ENGINE_SOFT, > > + NAND_ECC_ENGINE_CONTROLLER, > > + NAND_ECC_ENGINE_ON_DIE, > > +}; > > + > > /** > > * enum nand_ecc_placement - NAND ECC placement > > * @NAND_ECC_PLACEMENT_FREE: The driver can decide where to put ECC bytes. > ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/