From patchwork Wed Sep 13 18:57:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bean Huo X-Patchwork-Id: 13383685 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 93BA8EE0207 for ; Wed, 13 Sep 2023 18:57:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231931AbjIMS55 (ORCPT ); Wed, 13 Sep 2023 14:57:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34772 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231875AbjIMS55 (ORCPT ); Wed, 13 Sep 2023 14:57:57 -0400 Received: from mo4-p01-ob.smtp.rzone.de (mo4-p01-ob.smtp.rzone.de [85.215.255.50]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 592D71986; Wed, 13 Sep 2023 11:57:52 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1694631464; cv=none; d=strato.com; s=strato-dkim-0002; b=DPHtpY+9yaNaBjXM0S7iQ3FTvq/e7xWJ/umX9xMrsV9pskG7u/BESc5iv8ZXk1QAl/ vfspTV5ZDEpzfLxaKVN4iaehMPfhpG4SJlBFlI4VJKHFkLJbeH+j6/WXWzzJwRKCl9bX ai4/UzNB3nQ+ySe4N7RJT7H3V7I70tOa6DYajye38v5vcp7/qhI6OlWOeF2OWbXw36my XP1JDG20FnqrvWfpB6FyKyGAn4y7xySWkeZnHDm2uYRCjhEEMylCdxaS7uoat71a1DHL QGY+2lFem6DxXhgbKBCp+ETBz1C+zGtR/LPusfPTnptbyTqaU/GIdSvEazot1gzjjkIU 1C9A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; t=1694631464; s=strato-dkim-0002; d=strato.com; h=Message-Id:Date:Subject:Cc:To:From:Cc:Date:From:Subject:Sender; bh=TSzuxS/aN3Nbyo4GrV9fy/VyKaTZefIltuvGTj3jiIM=; b=WlXZtHrPCSmeY6uHyQIdm/GIKqRcGtf9eE4l2J3Vhsdy67kui0vf5K+s3YQpc1mTza yzyPD5iS3Fk3LdzCVA9CwgW1uCDg5OMMAEMajHnV806tMjNAkR5UQ9RkaWhcPhdD2v8j YbHta/nkRyHpSx1HwIo9u5NjiKJheNA569UyivA31Hauncj65dcqplvMJfRwtEFyjjeZ d1wWxz6NW64dlkmuZgHEgt2Bf1sllAweoHC2s6Lk7ZdhPaijs1ttZbOJ02DHOp5FbVNe JlVWs+KkAfcA+pZ5wsuRgdIGYurdJ6sqNWn6cXQQoESOtpgpi+KsfgHgdppKuoMW0IU+ BTKQ== ARC-Authentication-Results: i=1; strato.com; arc=none; dkim=none X-RZG-CLASS-ID: mo01 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1694631464; s=strato-dkim-0002; d=iokpp.de; h=Message-Id:Date:Subject:Cc:To:From:Cc:Date:From:Subject:Sender; bh=TSzuxS/aN3Nbyo4GrV9fy/VyKaTZefIltuvGTj3jiIM=; b=Qb7QotStzGmc+mw/bCLwojLewjyAVhNYPUg5kBLUNIn+HeFKvk/J0iJhTV9efWgK49 EFQCoRXT56KB5hH8/OFrbaDxYkf+G+eyQWjIVF/0GCaQiLzO38AEq6UP8E8REcDC4I64 /kw2ZBklqe4yluP3/f6S3aT55NFH2QSx8ZsiHMIGY+YgvCza3NdX7cv6X9ArQyR1Xn6z 7DoWygS9/ABQLO+XHJmt9fD0fw9YHCCAwMCgzaZbYe/bSCtD94A8MtUKieyvuclvxLdQ ecjm4KAVo2BlGHU7xLK/p9RGgJk6ql30rAxB9cQg7vbclhxnO4/CbCxJf2L6MCCmf2oh 1njA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; t=1694631464; s=strato-dkim-0003; d=iokpp.de; h=Message-Id:Date:Subject:Cc:To:From:Cc:Date:From:Subject:Sender; bh=TSzuxS/aN3Nbyo4GrV9fy/VyKaTZefIltuvGTj3jiIM=; b=jCzO1nbUmP7jGMNmoUu8ye9hz50Zb8hYkocZy3Xcu12N0X2p5xWdqGdQ8BafQy1R9g xgnGj+mAmh/+qIvO/sAg== X-RZG-AUTH: ":LmkFe0i9dN8c2t4QQyGBB/NDXvjDB6pBSedrgBzPc9DUyubU4DD1QLj68UeUr1+U1BzWso7brrTiwuvWuOfNWM/Vrq6e2vj3HGht" Received: from blinux.speedport.ip by smtp.strato.de (RZmta 49.8.2 AUTH) with ESMTPSA id V04024z8DIviA2Z (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Wed, 13 Sep 2023 20:57:44 +0200 (CEST) From: Bean Huo To: ulf.hansson@linaro.org, adrian.hunter@intel.com, beanhuo@micron.com, jakub.kwapisz@toradex.com, rafael.beims@toradex.com Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH v1] mmc: Add quirk MMC_QUIRK_BROKEN_CACHE_FLUSH for Micron eMMC Q2J54A Date: Wed, 13 Sep 2023 20:57:35 +0200 Message-Id: <20230913185735.459661-1-beanhuo@iokpp.de> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org From: Bean Huo Micron MTFC4GACAJCN eMMC supports cache but requires that flush cache operation be allowed only after a write has occurred. Otherwise, the cache flush command or subsequent commands will time out. Signed-off-by: Bean Huo Cc: stable@vger.kernel.org --- drivers/mmc/core/core.c | 6 ++++++ drivers/mmc/core/mmc.c | 5 +++++ drivers/mmc/core/quirks.h | 7 ++++--- include/linux/mmc/card.h | 2 ++ 4 files changed, 17 insertions(+), 3 deletions(-) diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 3d3e0ca52614..5f858eb5f62c 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -259,6 +259,12 @@ static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) host->cqe_ops->cqe_off(host); host->ops->request(host, mrq); + + if (host->card->quirks & MMC_QUIRK_BROKEN_CACHE_FLUSH && !host->card->written_flag) { + if (mrq->cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK || + mrq->cmd->opcode == MMC_WRITE_BLOCK) + host->card->written_flag = true; + } } static void mmc_mrq_pr_debug(struct mmc_host *host, struct mmc_request *mrq, diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 89cd48fcec79..a2edd065fa1b 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -1929,6 +1929,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, if (!oldcard) host->card = card; + card->written_flag = false; + return 0; free_card: @@ -2081,6 +2083,9 @@ static int _mmc_flush_cache(struct mmc_host *host) { int err = 0; + if (host->card->quirks & MMC_QUIRK_BROKEN_CACHE_FLUSH && !host->card->written_flag) + return err; + if (_mmc_cache_enabled(host)) { err = mmc_switch(host->card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_FLUSH_CACHE, 1, diff --git a/drivers/mmc/core/quirks.h b/drivers/mmc/core/quirks.h index 32b64b564fb1..5e68c8b4cdca 100644 --- a/drivers/mmc/core/quirks.h +++ b/drivers/mmc/core/quirks.h @@ -110,11 +110,12 @@ static const struct mmc_fixup __maybe_unused mmc_blk_fixups[] = { MMC_QUIRK_TRIM_BROKEN), /* - * Micron MTFC4GACAJCN-1M advertises TRIM but it does not seems to - * support being used to offload WRITE_ZEROES. + * Micron MTFC4GACAJCN-1M supports TRIM but does not appear to suppor + * WRITE_ZEROES offloading. It also supports caching, but the cache can + * only be flushed after a write has occurred. */ MMC_FIXUP("Q2J54A", CID_MANFID_MICRON, 0x014e, add_quirk_mmc, - MMC_QUIRK_TRIM_BROKEN), + MMC_QUIRK_TRIM_BROKEN | MMC_QUIRK_BROKEN_CACHE_FLUSH), /* * Kingston EMMC04G-M627 advertises TRIM but it does not seems to diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index daa2f40d9ce6..7b12eebc5586 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -295,7 +295,9 @@ struct mmc_card { #define MMC_QUIRK_BROKEN_HPI (1<<13) /* Disable broken HPI support */ #define MMC_QUIRK_BROKEN_SD_DISCARD (1<<14) /* Disable broken SD discard support */ #define MMC_QUIRK_BROKEN_SD_CACHE (1<<15) /* Disable broken SD cache support */ +#define MMC_QUIRK_BROKEN_CACHE_FLUSH (1<<16) /* Don't flush cache until the write has occurred */ + bool written_flag; /* Indicates eMMC has been written since power on */ bool reenable_cmdq; /* Re-enable Command Queue */ unsigned int erase_size; /* erase size in sectors */