From patchwork Wed Jun 20 07:27:39 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Abhishek Sahu X-Patchwork-Id: 932009 X-Patchwork-Delegate: miquel.raynal@bootlin.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="ocPnsDAI"; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=infradead.org header.i=@infradead.org header.b="GFAsiJ4b"; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=codeaurora.org header.i=@codeaurora.org header.b="X5/g9SCU"; dkim=neutral (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="M1dIOHRp"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 419cNb0d5Nz9s2R for ; Wed, 20 Jun 2018 17:46:55 +1000 (AEST) 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:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=2K7VKdGFzA780FPwZJc2cgmLlnugvuee+ViLLiszlbc=; b=ocPnsDAIqfAv8+ FHf9ePbbTg6y+ya/7HXc259jxGE7lUi5Ls/j8qdmOww37UDNxPeV06t1R8W7xpMYnaa9SszwxTInQ BqmgBbhX6RP4RGijGEZFeU3DLBzWTSAAEZdGe5SJiJUOU67ZFoaUTLSusjvCVYrOe/xjD3495hzrC w0YwlYPlSIp0ECwCaj6BjpjHTxLea4cZQhihSpH0HDcMILvS99gCQtDSURb1Rc0s2uDTUQK+fpDQj /nbqtlJV/ybSvvpfxqMXZJOPi2gkr1pWi5zjfxQR+5LHBua1a/h5nzLjwp1u9+eWx7DwK1O8+OJga /Rt/q6f4JYgHKVVinSAA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fVXpH-00043m-O4; Wed, 20 Jun 2018 07:46:47 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fVXoO-0003Gy-K4 for linux-mtd@bombadil.infradead.org; Wed, 20 Jun 2018 07:45:52 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:Content-Type: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=/Kf6Z3MJxPb9bhTFD468QlXWamfSsNlzp1wwh2o9Cvg=; b=GFAsiJ4bSHNpm4X3dYUSqqyd58 eYmsSz1sYKa6gx+plAhvfzzcIsqZPFnITfvu7Kh9vG/0O7gLrC4jUXy/Cyw99mEQmBpowpW4OhURQ 89cKpG+MGwwbbVDwkoWE5mmIS3jmggavE3BpPErLu56xV9iHhiHUOvbHGDUIyuC6n8ict1uYNimeI Gjy0McLvZv9GLzQXcmg1DNnZAW+BueN1zLSToMAecfAd8CAGD89ObFUH5gAoG2SEPnEuUP9/go43q hHfg3WdeBKas0oRtlmte4eLFe9cNfJflvH1c0io5CLx/0gEda12ZyUKfoLbx8MI24fIi/uT22eF+D 2Wl+YXhA==; Received: from smtp.codeaurora.org ([198.145.29.96]) by casper.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fVXXw-0003ev-Cy for linux-mtd@lists.infradead.org; Wed, 20 Jun 2018 07:28:57 +0000 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 2B2B960BDD; Wed, 20 Jun 2018 07:28:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1529479721; bh=gcPPzcOJhf3N2bOo1iYtxuUu4qDfNe+lICRZ/U5PNcw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=X5/g9SCU0EuEoYofbcp16zmUPVPST3G7OnLp0zL+sqegIHY+fQ5tILG+4u5KaJon1 /pRc7e6CblP/l0eHttvGZk7oVIMfOxLfOUB3gj1BwHqb71eUzBJeUO9yjrRuYnVDLX ceuazruNhCe6hHv4vyI94zgGu5lnKgPjpjB0O2fg= X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.8 required=2.0 tests=ALL_TRUSTED,BAYES_00, DKIM_SIGNED, T_DKIM_INVALID autolearn=no autolearn_force=no version=3.4.0 Received: from absahu-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: absahu@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 06D6B60B14; Wed, 20 Jun 2018 07:28:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1529479720; bh=gcPPzcOJhf3N2bOo1iYtxuUu4qDfNe+lICRZ/U5PNcw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=M1dIOHRpyux6A+/TQAJyv2f5BsqTpDzGPvZNiPpHSfaeVT7sfwNF9cjm6priPYdqf +FzvXLSJ2EDt0vl68jh6Z54YuaiTwbc75NaS9ohdIuHPPYMimIVUZxPW+Prqik0BDq ivUtE0vT5yMcyWdFndShff3xYTtd021KgTNkMj0I= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 06D6B60B14 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=absahu@codeaurora.org From: Abhishek Sahu To: Boris Brezillon , Miquel Raynal Subject: [PATCH v4 12/15] mtd: rawnand: qcom: check for operation errors in case of raw read Date: Wed, 20 Jun 2018 12:57:39 +0530 Message-Id: <1529479662-4026-13-git-send-email-absahu@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1529479662-4026-1-git-send-email-absahu@codeaurora.org> References: <1529479662-4026-1-git-send-email-absahu@codeaurora.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180620_082852_861190_92276D8D X-CRM114-Status: GOOD ( 24.44 ) X-Spam-Score: -2.4 (--) X-Spam-Report: SpamAssassin version 3.4.1 on casper.infradead.org summary: Content analysis details: (-2.4 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [198.145.29.96 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Archit Taneja , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Marek Vasut , Abhishek Sahu , linux-mtd@lists.infradead.org, Richard Weinberger , Andy Gross , Brian Norris , David Woodhouse Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Currently there is no error checking for raw read. For raw reads, there won’t be any ECC failure but the operational failures are possible, so schedule the NAND_FLASH_STATUS read after each codeword. Acked-by: Miquel Raynal Signed-off-by: Abhishek Sahu --- * Changes from v3: 1. Since bad block reorganization patch has removed from this patch series so following change is required in copy_last_cw) config_nand_single_cw_page_read(nandc); -> config_nand_single_cw_page_read(nandc, host->use_ecc); * Changes from v2: NONE * Changes from v1: 1. Removed the code for copy_last_cw. drivers/mtd/nand/raw/qcom_nandc.c | 58 +++++++++++++++++++++++++++------------ 1 file changed, 40 insertions(+), 18 deletions(-) diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c index 887b1f6..5999c39 100644 --- a/drivers/mtd/nand/raw/qcom_nandc.c +++ b/drivers/mtd/nand/raw/qcom_nandc.c @@ -1096,7 +1096,8 @@ static void config_nand_page_read(struct qcom_nand_controller *nandc) * Helper to prepare DMA descriptors for configuring registers * before reading each codeword in NAND page. */ -static void config_nand_cw_read(struct qcom_nand_controller *nandc) +static void +config_nand_cw_read(struct qcom_nand_controller *nandc, bool use_ecc) { if (nandc->props->is_bam) write_reg_dma(nandc, NAND_READ_LOCATION_0, 4, @@ -1105,19 +1106,25 @@ static void config_nand_cw_read(struct qcom_nand_controller *nandc) write_reg_dma(nandc, NAND_FLASH_CMD, 1, NAND_BAM_NEXT_SGL); write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL); - read_reg_dma(nandc, NAND_FLASH_STATUS, 2, 0); - read_reg_dma(nandc, NAND_ERASED_CW_DETECT_STATUS, 1, - NAND_BAM_NEXT_SGL); + if (use_ecc) { + read_reg_dma(nandc, NAND_FLASH_STATUS, 2, 0); + read_reg_dma(nandc, NAND_ERASED_CW_DETECT_STATUS, 1, + NAND_BAM_NEXT_SGL); + } else { + read_reg_dma(nandc, NAND_FLASH_STATUS, 1, NAND_BAM_NEXT_SGL); + } } /* * Helper to prepare dma descriptors to configure registers needed for reading a * single codeword in page */ -static void config_nand_single_cw_page_read(struct qcom_nand_controller *nandc) +static void +config_nand_single_cw_page_read(struct qcom_nand_controller *nandc, + bool use_ecc) { config_nand_page_read(nandc); - config_nand_cw_read(nandc); + config_nand_cw_read(nandc, use_ecc); } /* @@ -1198,7 +1205,7 @@ static int nandc_param(struct qcom_nand_host *host) nandc->buf_count = 512; memset(nandc->data_buffer, 0xff, nandc->buf_count); - config_nand_single_cw_page_read(nandc); + config_nand_single_cw_page_read(nandc, false); read_data_dma(nandc, FLASH_BUF_ACC, nandc->data_buffer, nandc->buf_count, 0); @@ -1563,6 +1570,23 @@ struct read_stats { __le32 erased_cw; }; +/* reads back FLASH_STATUS register set by the controller */ +static int check_flash_errors(struct qcom_nand_host *host, int cw_cnt) +{ + struct nand_chip *chip = &host->chip; + struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip); + int i; + + for (i = 0; i < cw_cnt; i++) { + u32 flash = le32_to_cpu(nandc->reg_read_buf[i]); + + if (flash & (FS_OP_ERR | FS_MPU_ERR)) + return -EIO; + } + + return 0; +} + /* * reads back status registers set by the controller to notify page read * errors. this is equivalent to what 'ecc->correct()' would do. @@ -1729,7 +1753,7 @@ static int read_page_ecc(struct qcom_nand_host *host, u8 *data_buf, } } - config_nand_cw_read(nandc); + config_nand_cw_read(nandc, true); if (data_buf) read_data_dma(nandc, FLASH_BUF_ACC, data_buf, @@ -1791,7 +1815,7 @@ static int copy_last_cw(struct qcom_nand_host *host, int page) set_address(host, host->cw_size * (ecc->steps - 1), page); update_rw_regs(host, 1, true); - config_nand_single_cw_page_read(nandc); + config_nand_single_cw_page_read(nandc, host->use_ecc); read_data_dma(nandc, FLASH_BUF_ACC, nandc->data_buffer, size, 0); @@ -1874,7 +1898,7 @@ static int qcom_nandc_read_page_raw(struct mtd_info *mtd, nandc_set_read_loc(nandc, 3, read_loc, oob_size2, 1); } - config_nand_cw_read(nandc); + config_nand_cw_read(nandc, false); read_data_dma(nandc, reg_off, data_buf, data_size1, 0); reg_off += data_size1; @@ -1893,12 +1917,13 @@ static int qcom_nandc_read_page_raw(struct mtd_info *mtd, } ret = submit_descs(nandc); - if (ret) + free_descs(nandc); + if (ret) { dev_err(nandc->dev, "failure to read raw page\n"); + return ret; + } - free_descs(nandc); - - return ret; + return check_flash_errors(host, ecc->steps); } /* implements ecc->read_oob() */ @@ -2117,7 +2142,6 @@ static int qcom_nandc_block_bad(struct mtd_info *mtd, loff_t ofs) struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip); struct nand_ecc_ctrl *ecc = &chip->ecc; int page, ret, bbpos, bad = 0; - u32 flash_status; page = (int)(ofs >> chip->page_shift) & chip->pagemask; @@ -2134,9 +2158,7 @@ static int qcom_nandc_block_bad(struct mtd_info *mtd, loff_t ofs) if (ret) goto err; - flash_status = le32_to_cpu(nandc->reg_read_buf[0]); - - if (flash_status & (FS_OP_ERR | FS_MPU_ERR)) { + if (check_flash_errors(host, 1)) { dev_warn(nandc->dev, "error when trying to read BBM\n"); goto err; }