From mboxrd@z Thu Jan 1 00:00:00 1970 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 27055C433EF for ; Wed, 26 Jan 2022 22:48:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230227AbiAZWsE (ORCPT ); Wed, 26 Jan 2022 17:48:04 -0500 Received: from mailout3.samsung.com ([203.254.224.33]:57609 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229672AbiAZWsD (ORCPT ); Wed, 26 Jan 2022 17:48:03 -0500 Received: from epcas3p3.samsung.com (unknown [182.195.41.21]) by mailout3.samsung.com (KnoxPortal) with ESMTP id 20220126224802epoutp03424607a00217378837004c504e451c7e~N85ofOCPO1241512415epoutp03O for ; Wed, 26 Jan 2022 22:48:02 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout3.samsung.com 20220126224802epoutp03424607a00217378837004c504e451c7e~N85ofOCPO1241512415epoutp03O DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1643237282; bh=cAy0eaNlYkL9KOyKZ0ePr7Lr3HmKsDoqPXCM/xP8opE=; h=Subject:Reply-To:From:To:Date:References:From; b=rBfFGnFYHHv8QiQ4F76oTRD0u8zMn1AvQdZ8+06E4xvitUBeDFVKFVI7pgqRCevBW spUER6tmAaQuk4IWq2Kj2HPfwcL/rwO9jHLFSwbISKJOXGLKFVPUYoYuWGmrAckj09 jnNTzZEHnx46K/ImYgjH5FBN5PlOlQszzqt4IEeQ= Received: from epsnrtp1.localdomain (unknown [182.195.42.162]) by epcas3p3.samsung.com (KnoxPortal) with ESMTP id 20220126224801epcas3p381da17853a0da81b4fe6d5f410a484d9~N85oFYTyv0942709427epcas3p3s; Wed, 26 Jan 2022 22:48:01 +0000 (GMT) Received: from epcpadp4 (unknown [182.195.40.18]) by epsnrtp1.localdomain (Postfix) with ESMTP id 4Jkf4x67z0z4x9QB; Wed, 26 Jan 2022 22:48:01 +0000 (GMT) Mime-Version: 1.0 Subject: [PATCH] scsi: ufs: Add checking lifetime attribute for WriteBooster Reply-To: j-young.choi@samsung.com Sender: Jinyoung CHOI From: Jinyoung CHOI To: ALIM AKHTAR , "avri.altman@wdc.com" , "jejb@linux.ibm.com" , "martin.petersen@oracle.com" , "bvanassche@acm.org" , "beanhuo@micron.com" , "cang@codeaurora.org" , "adrian.hunter@intel.com" , "asutoshd@codeaurora.org" , "linux-scsi@vger.kernel.org" , "linux-kernel@vger.kernel.org" X-Priority: 3 X-Content-Kind-Code: NORMAL X-CPGS-Detection: blocking_info_exchange X-Drm-Type: N,general X-Msg-Generator: Mail X-Msg-Type: PERSONAL X-Reply-Demand: N Message-ID: <1891546521.01643237281916.JavaMail.epsvc@epcpadp4> Date: Wed, 26 Jan 2022 20:25:55 +0900 X-CMS-MailID: 20220126112555epcms2p6eebb1afe9566747ca4aeb23fc3ef033e Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: AUTO_CONFIDENTIAL X-CPGSPASS: Y X-CPGSPASS: Y X-Hop-Count: 3 X-CMS-RootMailID: 20220126104125epcms2p50afb250190ffc3f2dc7b16df31757c94 References: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Because WB performs write in SLC mode, it is difficult to use WB infinitely. Vendors can set the Lifetime limit value to the device. If Lifetime exceeds the limit value, the device itself can disable the WB feature. WB feature supports "bWriteBoosterBufferLifeTimeEst (IDN = 1E)" attribute. With Lifetime exceeding the limit value, the current driver continuously performs the following query. - Write Flag: WB_ENABLE / DISABLE - Read attr: Available Buffer Size - Read attr: Current Buffer Size This patch recognizes that WriteBooster is no longer supported by the device, and prevent unnecessary query issues. Signed-off-by: Jinyoung Choi --- drivers/scsi/ufs/ufs.h | 6 +++++ drivers/scsi/ufs/ufshcd.c | 52 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 58 insertions(+) diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h index 0bfdca3e648e..4a00c24a3209 100644 --- a/drivers/scsi/ufs/ufs.h +++ b/drivers/scsi/ufs/ufs.h @@ -43,6 +43,12 @@ /* WriteBooster buffer is available only for the logical unit from 0 to 7 */ #define UFS_UPIU_MAX_WB_LUN_ID 8 +/* + * WriteBooster buffer lifetime has a limit setted by vendor. + * If it is over the limit, WriteBooster feature will be disabled. + */ +#define UFS_WB_EXCEED_LIFETIME 0x0B + /* Well known logical unit id in LUN field of UPIU */ enum { UFS_UPIU_REPORT_LUNS_WLUN = 0x81, diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 460d2b440d2e..6088af45633b 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -5778,6 +5778,47 @@ static bool ufshcd_wb_presrv_usrspc_keep_vcc_on(struct ufs_hba *hba, return false; } +static void ufshcd_wb_force_disable(struct ufs_hba *hba) +{ + if (!(hba->quirks & UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL)) + ufshcd_wb_toggle_flush(hba, false); + + ufshcd_wb_toggle_flush_during_h8(hba, false); + ufshcd_wb_toggle(hba, false); + hba->caps &= ~UFSHCD_CAP_WB_EN; + + dev_info(hba->dev, "%s: WB force disabled\n", __func__); +} + +static bool ufshcd_is_wb_buf_lifetime_available(struct ufs_hba *hba) +{ + u32 lifetime; + int ret; + u8 index; + + index = ufshcd_wb_get_query_index(hba); + ret = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR, + QUERY_ATTR_IDN_WB_BUFF_LIFE_TIME_EST, + index, 0, &lifetime); + if (ret) { + dev_err(hba->dev, + "%s: bWriteBoosterBufferLifeTimeEst read failed %d\n", + __func__, ret); + return false; + } + + if (lifetime == UFS_WB_EXCEED_LIFETIME) { + dev_err(hba->dev, "%s: WB buf lifetime is exhausted 0x%0.2X\n", + __func__, lifetime); + return false; + } + + dev_dbg(hba->dev, "%s: WB buf lifetime is 0x%0.2X\n", + __func__, lifetime); + + return true; +} + static bool ufshcd_wb_need_flush(struct ufs_hba *hba) { int ret; @@ -5786,6 +5827,12 @@ static bool ufshcd_wb_need_flush(struct ufs_hba *hba) if (!ufshcd_is_wb_allowed(hba)) return false; + + if (!ufshcd_is_wb_buf_lifetime_available(hba)) { + ufshcd_wb_force_disable(hba); + return false; + } + /* * The ufs device needs the vcc to be ON to flush. * With user-space reduction enabled, it's enough to enable flush @@ -7486,6 +7533,7 @@ static void ufshcd_wb_probe(struct ufs_hba *hba, u8 *desc_buf) if (!ufshcd_is_wb_allowed(hba)) return; + /* * Probe WB only for UFS-2.2 and UFS-3.1 (and later) devices or * UFS devices with quirk UFS_DEVICE_QUIRK_SUPPORT_EXTENDED_FEATURES @@ -7537,6 +7585,10 @@ static void ufshcd_wb_probe(struct ufs_hba *hba, u8 *desc_buf) if (!d_lu_wb_buf_alloc) goto wb_disabled; } + + if (!ufshcd_is_wb_buf_lifetime_available(hba)) + goto wb_disabled; + return; wb_disabled: -- 2.25.1