Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932686AbcCHLPv (ORCPT ); Tue, 8 Mar 2016 06:15:51 -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 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-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2987 Lines: 86 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) -- 2.1.4