From patchwork Tue Mar 8 11:15:10 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris BREZILLON X-Patchwork-Id: 8531731 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 5BE1F9F46A for ; Tue, 8 Mar 2016 11:16:03 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 86428201BC for ; Tue, 8 Mar 2016 11:16:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9A4AD20165 for ; Tue, 8 Mar 2016 11:16:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933061AbcCHLPk (ORCPT ); Tue, 8 Mar 2016 06:15:40 -0500 Received: from down.free-electrons.com ([37.187.137.238]:40386 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932929AbcCHLP3 (ORCPT ); Tue, 8 Mar 2016 06:15:29 -0500 Received: by mail.free-electrons.com (Postfix, from userid 110) id 1606F4AF; Tue, 8 Mar 2016 12:15:27 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from localhost.localdomain (AToulouse-657-1-1129-172.w92-156.abo.wanadoo.fr [92.156.51.172]) by mail.free-electrons.com (Postfix) with ESMTPSA id 383E6263; Tue, 8 Mar 2016 12:15:26 +0100 (CET) From: Boris Brezillon To: Andrew Morton , Dave Gordon , David Woodhouse , Brian Norris , linux-mtd@lists.infradead.org Cc: Mark Brown , linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Maxime Ripard , Chen-Yu Tsai , linux-sunxi@googlegroups.com, Vinod Koul , Dan Williams , dmaengine@vger.kernel.org, Mauro Carvalho Chehab , Hans Verkuil , Laurent Pinchart , linux-media@vger.kernel.org, Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , devicetree@vger.kernel.org, Boris Brezillon Subject: [PATCH 2/7] mtd: nand: sunxi: make OOB retrieval optional Date: Tue, 8 Mar 2016 12:15:10 +0100 Message-Id: <1457435715-24740-3-git-send-email-boris.brezillon@free-electrons.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1457435715-24740-1-git-send-email-boris.brezillon@free-electrons.com> References: <1457435715-24740-1-git-send-email-boris.brezillon@free-electrons.com> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP sunxi_nfc_hw_ecc_read_chunk() always retrieves the ECC and protected free bytes, no matter if the user really asked for it or not. This can take a non negligible amount of time, especially on NAND chips exposing large OOB areas (> 1KB). Make it optional. Signed-off-by: Boris Brezillon --- drivers/mtd/nand/sunxi_nand.c | 27 ++++++++++++++++----------- 1 file changed, 16 insertions(+), 11 deletions(-) diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c index 90c121d..7b3ae72 100644 --- a/drivers/mtd/nand/sunxi_nand.c +++ b/drivers/mtd/nand/sunxi_nand.c @@ -869,7 +869,7 @@ static int sunxi_nfc_hw_ecc_read_chunk(struct mtd_info *mtd, u8 *oob, int oob_off, int *cur_off, unsigned int *max_bitflips, - bool bbm, int page) + bool bbm, bool oob_required, int page) { struct nand_chip *nand = mtd_to_nand(mtd); struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller); @@ -901,7 +901,8 @@ static int sunxi_nfc_hw_ecc_read_chunk(struct mtd_info *mtd, *cur_off = oob_off + ecc->bytes + 4; - ret = sunxi_nfc_hw_ecc_correct(mtd, data, oob, 0, &erased); + ret = sunxi_nfc_hw_ecc_correct(mtd, data, oob_required ? oob : NULL, 0, + &erased); if (erased) return 1; @@ -929,12 +930,14 @@ static int sunxi_nfc_hw_ecc_read_chunk(struct mtd_info *mtd, } else { memcpy_fromio(data, nfc->regs + NFC_RAM0_BASE, ecc->size); - nand->cmdfunc(mtd, NAND_CMD_RNDOUT, oob_off, -1); - sunxi_nfc_randomizer_read_buf(mtd, oob, ecc->bytes + 4, - true, page); + if (oob_required) { + nand->cmdfunc(mtd, NAND_CMD_RNDOUT, oob_off, -1); + sunxi_nfc_randomizer_read_buf(mtd, oob, ecc->bytes + 4, + true, page); - sunxi_nfc_hw_ecc_get_prot_oob_bytes(mtd, oob, 0, - bbm, page); + sunxi_nfc_hw_ecc_get_prot_oob_bytes(mtd, oob, 0, + bbm, page); + } } sunxi_nfc_hw_ecc_update_stats(mtd, max_bitflips, ret); @@ -1048,7 +1051,7 @@ static int sunxi_nfc_hw_ecc_read_page(struct mtd_info *mtd, ret = sunxi_nfc_hw_ecc_read_chunk(mtd, data, data_off, oob, oob_off + mtd->writesize, &cur_off, &max_bitflips, - !i, page); + !i, oob_required, page); if (ret < 0) return ret; else if (ret) @@ -1086,8 +1089,8 @@ static int sunxi_nfc_hw_ecc_read_subpage(struct mtd_info *mtd, ret = sunxi_nfc_hw_ecc_read_chunk(mtd, data, data_off, oob, oob_off + mtd->writesize, - &cur_off, &max_bitflips, - !i, page); + &cur_off, &max_bitflips, !i, + false, page); if (ret < 0) return ret; } @@ -1149,7 +1152,9 @@ static int sunxi_nfc_hw_syndrome_ecc_read_page(struct mtd_info *mtd, ret = sunxi_nfc_hw_ecc_read_chunk(mtd, data, data_off, oob, oob_off, &cur_off, - &max_bitflips, !i, page); + &max_bitflips, !i, + oob_required, + page); if (ret < 0) return ret; else if (ret)