From nobody Tue Sep 16 21:45:08 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 077AAC4332F for ; Thu, 29 Dec 2022 18:16:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233998AbiL2SQI (ORCPT ); Thu, 29 Dec 2022 13:16:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41194 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233915AbiL2SPz (ORCPT ); Thu, 29 Dec 2022 13:15:55 -0500 Received: from wout2-smtp.messagingengine.com (wout2-smtp.messagingengine.com [64.147.123.25]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 19777DFA8 for ; Thu, 29 Dec 2022 10:15:47 -0800 (PST) Received: from compute3.internal (compute3.nyi.internal [10.202.2.43]) by mailout.west.internal (Postfix) with ESMTP id C78A13200908; Thu, 29 Dec 2022 13:15:45 -0500 (EST) Received: from mailfrontend1 ([10.202.2.162]) by compute3.internal (MEProxy); Thu, 29 Dec 2022 13:15:46 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sholland.org; h= cc:cc:content-transfer-encoding:date:date:from:from:in-reply-to :in-reply-to:message-id:mime-version:references:reply-to:sender :subject:subject:to:to; s=fm3; t=1672337745; x=1672424145; bh=+9 bUzxjZZvUZxKDoetxLqlF5Y2GGvm4/vcpqx17W7w8=; b=JZtCisfL3NacHn39+p vu2PzPs1eTU7wxsQulhC8spek/2T+EY1IZvc+ZwSNINSFCUVs/52FHONaI4JGvIh SpXIz6y3O2oDrMpIfRPjfchA9XwQnVP4r+FRA3Fzypik0DhSlH2HC0Wpd6MlEkEY GGahWBBo02ZkwtxSma2pt+WdvOp09Bbg4ZwzffkS0229qwAoTM9S1HR7hvL+89gC /LlCnVzSC/DIuh040IkQyoiBdRf+sacFJNrryWmjIybJz9sJzkaPJmBUAHqx574B PQjGCh0ppF8CUgOhVMn1MVUEDwGWJ6GYbuOtkIUDvf8uB7+rh0aB9oED8bPvLHij ySRw== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding:date:date :feedback-id:feedback-id:from:from:in-reply-to:in-reply-to :message-id:mime-version:references:reply-to:sender:subject :subject:to:to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender :x-sasl-enc; s=fm2; t=1672337745; x=1672424145; bh=+9bUzxjZZvUZx KDoetxLqlF5Y2GGvm4/vcpqx17W7w8=; b=CL32CpCkwfMFoRvVq27PsDrZo+9wj kTu0i/znVDfPD5jKBz6jMKO84lA2gYR8auy5pf7r/k6pJ6oUNjbPqwslpUTyGFXy HUes1LXluzRe7ZAixBCXH8eKLw6p0MqwOHCRuAdaQH6msr4yJpxbvNG47JkITqjW i8QWansl6wSylP9MJzACigtvxJr2AlfDFtd4QGbk4j7Sd4nM1omfs6q8R8x/pQf4 PlCucH2NTVoZN/mlZU9waD5EGTzXgUwc/LKXfFeE/x9Jiq7lQrY1gtgURRYPdfv8 zN/62pEgNlvM1gU/lzlZO8W3ztGGtwuxDFHcvuoem4GXUhF1diCT3pTfg== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedrieeggdduudduucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephffvvefufffkofgjfhgggfestdekredtredttdenucfhrhhomhepufgrmhhu vghlucfjohhllhgrnhguuceoshgrmhhuvghlsehshhholhhlrghnugdrohhrgheqnecugg ftrfgrthhtvghrnhepudekteeuudehtdelteevgfduvddvjefhfedulefgudevgeeghefg udefiedtveetnecuvehluhhsthgvrhfuihiivgepudenucfrrghrrghmpehmrghilhhfrh homhepshgrmhhuvghlsehshhholhhlrghnugdrohhrgh X-ME-Proxy: Feedback-ID: i0ad843c9:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Thu, 29 Dec 2022 13:15:44 -0500 (EST) From: Samuel Holland To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Chen-Yu Tsai , Jernej Skrabec Cc: Boris Brezillon , Samuel Holland , Brian Norris , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org, linux-sunxi@lists.linux.dev Subject: [PATCH 6/7] mtd: rawnand: sunxi: Update OOB layout to match hardware Date: Thu, 29 Dec 2022 12:15:25 -0600 Message-Id: <20221229181526.53766-7-samuel@sholland.org> X-Mailer: git-send-email 2.37.4 In-Reply-To: <20221229181526.53766-1-samuel@sholland.org> References: <20221229181526.53766-1-samuel@sholland.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" When using the hardware ECC engine, the OOB data is made available in the NFC_REG_USER_DATA registers, one 32-bit word per ECC step. Any additional bytes are only accessible through raw reads and software descrambling. For efficiency, and to match the vendor driver, ignore these extra bytes. Signed-off-by: Samuel Holland --- drivers/mtd/nand/raw/sunxi_nand.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi= _nand.c index 8e873f4fec9a..a3bc9f7f9e5a 100644 --- a/drivers/mtd/nand/raw/sunxi_nand.c +++ b/drivers/mtd/nand/raw/sunxi_nand.c @@ -1604,6 +1604,13 @@ static int sunxi_nand_ooblayout_free(struct mtd_info= *mtd, int section, return 0; } =20 + /* + * The controller does not provide access to OOB bytes + * past the end of the ECC data. + */ + if (section =3D=3D ecc->steps && ecc->engine_type =3D=3D NAND_ECC_ENGINE_= TYPE_ON_HOST) + return -ERANGE; + oobregion->offset =3D section * (ecc->bytes + 4); =20 if (section < ecc->steps) --=20 2.37.4