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=ham 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 9B74CC83000 for ; Wed, 29 Apr 2020 16:53:13 +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 6CE88208FE for ; Wed, 29 Apr 2020 16:53:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Nv4vmyxr" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6CE88208FE Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bootlin.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=qCYXV7chEvZtSF2CGn3ndKvW4rqn3efTUW7ET8Tmx1A=; b=Nv4vmyxr2G9acV UXvpEHp/7L38LfbGvH6zetM2H1fgbj0qxSEw4fVkE0Zi4Eb6ULq9ZZQu6SnGkKvLRVoBbJFfAb6hP kZwjscmztC/qnOD1W3hhk2QBqejMBC3Vw3uyeMJYWpu9883VmP/Uk6b/EI/EK4zLs98GkOv+aXvlh 15WKdt2+1EcLYMye8u4goE39Q63TkV3xytzUuJxYd7VMA7/q7g3DGvURuVTXGl9aTuNrIk24tX2s8 5CS9dsjHr7oRC9u7wITX0RnALZspPoXRUFekq3iMxOyWOLuXTYV2L8JrrkY/93P6filvDCiwNT1+v SmevnLeNxlCVLIn6eQ1A==; 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 1jTpxE-0002zw-8M; Wed, 29 Apr 2020 16:53:00 +0000 Received: from relay6-d.mail.gandi.net ([217.70.183.198]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jTpxB-0002za-V1 for linux-mtd@lists.infradead.org; Wed, 29 Apr 2020 16:52:59 +0000 X-Originating-IP: 91.224.148.103 Received: from xps13 (unknown [91.224.148.103]) (Authenticated sender: miquel.raynal@bootlin.com) by relay6-d.mail.gandi.net (Postfix) with ESMTPSA id 0A33CC0007; Wed, 29 Apr 2020 16:52:53 +0000 (UTC) Date: Wed, 29 Apr 2020 18:52:52 +0200 From: Miquel Raynal To: Boris Brezillon Subject: Re: [PATCH v2 09/11] mtd: rawnand: Expose monolithic read/write_page_raw() helpers Message-ID: <20200429185252.1b81a3ea@xps13> In-Reply-To: <20200429183137.026eb5f9@collabora.com> References: <20200429155540.22048-1-miquel.raynal@bootlin.com> <20200429155540.22048-10-miquel.raynal@bootlin.com> <20200429181509.657aa2e5@collabora.com> <20200429182631.71cafee4@xps13> <20200429183137.026eb5f9@collabora.com> Organization: Bootlin X-Mailer: Claws Mail 3.17.4 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200429_095258_134869_EDB72B38 X-CRM114-Status: GOOD ( 19.96 ) 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: Michal Simek , Vignesh Raghavendra , Tudor Ambarus , Richard Weinberger , linux-mtd@lists.infradead.org, Thomas Petazzoni , Naga Sureshkumar Relli 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 Hi Boris, Boris Brezillon wrote on Wed, 29 Apr 2020 18:31:37 +0200: > On Wed, 29 Apr 2020 18:26:31 +0200 > Miquel Raynal wrote: > > > Hi Boris, > > > > Boris Brezillon wrote on Wed, 29 Apr > > 2020 18:15:09 +0200: > > > > > On Wed, 29 Apr 2020 17:55:38 +0200 > > > Miquel Raynal wrote: > > > > > > > The current nand_read/write_page_raw() helpers are already widely used > > > > but do not fit the purpose of "constrained" controllers which cannot, > > > > for instance, separate command/address cycles with data cycles. > > > > > > > > Workaround this issue by proposing alternative helpers that cannot be > > > > used by controller drivers instead. > > > > > > > > Signed-off-by: Miquel Raynal > > > > --- > > > > drivers/mtd/nand/raw/nand_base.c | 60 ++++++++++++++++++++++++++++++++ > > > > include/linux/mtd/rawnand.h | 8 +++-- > > > > 2 files changed, 66 insertions(+), 2 deletions(-) > > > > > > > > diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c > > > > index 15a9189b2307..2e525cb5a4e4 100644 > > > > --- a/drivers/mtd/nand/raw/nand_base.c > > > > +++ b/drivers/mtd/nand/raw/nand_base.c > > > > @@ -2629,6 +2629,39 @@ int nand_read_page_raw(struct nand_chip *chip, uint8_t *buf, int oob_required, > > > > } > > > > EXPORT_SYMBOL(nand_read_page_raw); > > > > > > > > +/** > > > > + * nand_monolithic_read_page_raw - Read raw page data without ECC in one go > > > > > > Maybe > > > > > > "Read the full page (data + OOB) with ECC engine disabled" > > > > > > ? > > > > This is not accurate as we don't enforce OOB read. > > Right > > > > > Don't you find "in one go" explicit enough? > > Well, "raw" and "without ECC" is redundant, that's the part I wanted to > see addressed. And the 'in one go' refers to the data/OOB split, which > is not clear here. > What about "Send a single request to the controller driver to read raw data" the end of the sentence might also be "...to read a page plus eventually the OOB area" ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/