From patchwork Sun Dec 6 10:13:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bean Huo X-Patchwork-Id: 338949 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D504C1B0D8 for ; Sun, 6 Dec 2020 10:14:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5BD852333E for ; Sun, 6 Dec 2020 10:14:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726035AbgLFKOp (ORCPT ); Sun, 6 Dec 2020 05:14:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726181AbgLFKOa (ORCPT ); Sun, 6 Dec 2020 05:14:30 -0500 Received: from mail-ed1-x543.google.com (mail-ed1-x543.google.com [IPv6:2a00:1450:4864:20::543]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 53CA4C0613D1; Sun, 6 Dec 2020 02:13:50 -0800 (PST) Received: by mail-ed1-x543.google.com with SMTP id c7so10486778edv.6; Sun, 06 Dec 2020 02:13:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=ZdbsWuYcR4owa0ugaVEt1w9R8x4VEIMlOHbG6PqGjpc=; b=hdHIUUDQcvGQNdSq3PA6aDJhp4DPSbVBWAvgC8aCdT5QEnP8q5hnW2xeI2Xk5zuQ+7 XUomhewxichdqZzOd3c7ZwA4HAcXlHHGPUi4EMws+S+Mlgp4kzFMX3eXjtHF/CBH1sa8 Yx097P5VF16BjtUfZW/oOi5C9hMUixKcpTRlfkyGdFDVCYaebmgWGtJzqbe0VZYvflrD RhYEx2g4TdWHznYgg1TRjeLedRqutDV88TcoQy8rdG8Wv0IPizR94fOZ7iUkwCaefVdq Cnb1IKYd+ScfjA6jB23LHVFVzYFTCRLuUhXP+K+86G3RtEmCjS1hLeJyJJgKp/5xqBzS 5aFA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=ZdbsWuYcR4owa0ugaVEt1w9R8x4VEIMlOHbG6PqGjpc=; b=tryA+uQB1wEXeiujKKxRPC8p0sdIAG2v0w21yOaOWRBJAFrWCbLTkITdah5W3rc+10 TGKZFjJyQAH6PJ4eNeyYKWSh4lvBU5TTkblLRiUHYvLlpbRZ/aMrEKgiLeUpWCRiaKu1 u1xF0GCFGKgO4YlGPnn45yewJ1VECVDGoG+JQBc8tcfbIUDMW1MXiadhzshz27hxopY5 KIF0I2HfCOLWQ8yNSsBzeRU0EAXC6zkxS+GEUjTneTdGPfa7jYSG1tx1QAGWsT/WaScg lrwYK4Zj0hIMawajvE/kKhkxQht+4mNaRa2Djz0AysH6eFvgHA+lDPwH3jp5EGGgY7Nq IsGA== X-Gm-Message-State: AOAM5323kBq1r0aSu+eK5qGd2BA/fVdYNcXsoS30ANqFtzng8nyzSw1o hyR7t6En/+xOVchj/k2FHCA= X-Google-Smtp-Source: ABdhPJx3SeXdhiVUfCBm9wor68PC8LWCPxQ53v/7MtKtk7OouV+WhVR5irFHp52jFlmXmKz69fHi1A== X-Received: by 2002:a50:b586:: with SMTP id a6mr15354121ede.206.1607249629002; Sun, 06 Dec 2020 02:13:49 -0800 (PST) Received: from localhost.localdomain (ip5f5bfce9.dynamic.kabel-deutschland.de. [95.91.252.233]) by smtp.gmail.com with ESMTPSA id f24sm7701919ejf.117.2020.12.06.02.13.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Dec 2020 02:13:48 -0800 (PST) From: Bean Huo To: alim.akhtar@samsung.com, avri.altman@wdc.com, asutoshd@codeaurora.org, jejb@linux.ibm.com, martin.petersen@oracle.com, stanley.chu@mediatek.com, beanhuo@micron.com, bvanassche@acm.org, tomas.winkler@intel.com, cang@codeaurora.org Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/3] scsi: ufs: Add "wb_on" sysfs node to control WB on/off Date: Sun, 6 Dec 2020 11:13:33 +0100 Message-Id: <20201206101335.3418-2-huobean@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201206101335.3418-1-huobean@gmail.com> References: <20201206101335.3418-1-huobean@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Bean Huo Currently UFS WriteBooster driver uses clock scaling up/down to set WB on/off, for the platform which doesn't support UFSHCD_CAP_CLK_SCALING, WB will be always on. Provide a sysfs attribute to enable/disable WB during runtime. Write 1/0 to "wb_on" sysfs node to enable/disable UFS WB. Signed-off-by: Bean Huo Reviewed-by: Avri Altman Reviewed-by: Stanley Chu --- drivers/scsi/ufs/ufs-sysfs.c | 40 ++++++++++++++++++++++++++++++++++++ drivers/scsi/ufs/ufshcd.c | 3 +-- drivers/scsi/ufs/ufshcd.h | 2 ++ 3 files changed, 43 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/ufs/ufs-sysfs.c b/drivers/scsi/ufs/ufs-sysfs.c index 08e72b7eef6a..b3bf7fca00e5 100644 --- a/drivers/scsi/ufs/ufs-sysfs.c +++ b/drivers/scsi/ufs/ufs-sysfs.c @@ -189,6 +189,44 @@ static ssize_t auto_hibern8_store(struct device *dev, return count; } +static ssize_t wb_on_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + + return scnprintf(buf, PAGE_SIZE, "%d\n", hba->wb_enabled); +} + +static ssize_t wb_on_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + unsigned int wb_enable; + ssize_t res; + + if (ufshcd_is_clkscaling_supported(hba)) { + /* If the platform supports UFSHCD_CAP_AUTO_BKOPS_SUSPEND, turn + * WB on/off will be done while clock scaling up/down. + */ + dev_warn(dev, "To control WB through wb_on is not allowed!\n"); + return -EOPNOTSUPP; + } + if (!ufshcd_is_wb_allowed(hba)) + return -EOPNOTSUPP; + + if (kstrtouint(buf, 0, &wb_enable)) + return -EINVAL; + + if (wb_enable != 0 && wb_enable != 1) + return -EINVAL; + + pm_runtime_get_sync(hba->dev); + res = ufshcd_wb_ctrl(hba, wb_enable); + pm_runtime_put_sync(hba->dev); + + return res < 0 ? res : count; +} + static DEVICE_ATTR_RW(rpm_lvl); static DEVICE_ATTR_RO(rpm_target_dev_state); static DEVICE_ATTR_RO(rpm_target_link_state); @@ -196,6 +234,7 @@ static DEVICE_ATTR_RW(spm_lvl); static DEVICE_ATTR_RO(spm_target_dev_state); static DEVICE_ATTR_RO(spm_target_link_state); static DEVICE_ATTR_RW(auto_hibern8); +static DEVICE_ATTR_RW(wb_on); static struct attribute *ufs_sysfs_ufshcd_attrs[] = { &dev_attr_rpm_lvl.attr, @@ -205,6 +244,7 @@ static struct attribute *ufs_sysfs_ufshcd_attrs[] = { &dev_attr_spm_target_dev_state.attr, &dev_attr_spm_target_link_state.attr, &dev_attr_auto_hibern8.attr, + &dev_attr_wb_on.attr, NULL }; diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 92d433d5f3ca..30332592e624 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -247,7 +247,6 @@ static inline int ufshcd_config_vreg_hpm(struct ufs_hba *hba, static int ufshcd_try_to_abort_task(struct ufs_hba *hba, int tag); static int ufshcd_wb_buf_flush_enable(struct ufs_hba *hba); static int ufshcd_wb_buf_flush_disable(struct ufs_hba *hba); -static int ufshcd_wb_ctrl(struct ufs_hba *hba, bool enable); static int ufshcd_wb_toggle_flush_during_h8(struct ufs_hba *hba, bool set); static inline void ufshcd_wb_toggle_flush(struct ufs_hba *hba, bool enable); static void ufshcd_hba_vreg_set_lpm(struct ufs_hba *hba); @@ -5307,7 +5306,7 @@ static void ufshcd_bkops_exception_event_handler(struct ufs_hba *hba) __func__, err); } -static int ufshcd_wb_ctrl(struct ufs_hba *hba, bool enable) +int ufshcd_wb_ctrl(struct ufs_hba *hba, bool enable) { int ret; u8 index; diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 61344c49c2cc..c61584dff74a 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -1068,6 +1068,8 @@ int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba, u8 *desc_buff, int *buff_len, enum query_opcode desc_op); +int ufshcd_wb_ctrl(struct ufs_hba *hba, bool enable); + /* Wrapper functions for safely calling variant operations */ static inline const char *ufshcd_get_var_name(struct ufs_hba *hba) { From patchwork Sun Dec 6 10:13:35 2020 Content-Type: text/plain; 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[95.91.252.233]) by smtp.gmail.com with ESMTPSA id f24sm7701919ejf.117.2020.12.06.02.13.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Dec 2020 02:13:50 -0800 (PST) From: Bean Huo To: alim.akhtar@samsung.com, avri.altman@wdc.com, asutoshd@codeaurora.org, jejb@linux.ibm.com, martin.petersen@oracle.com, stanley.chu@mediatek.com, beanhuo@micron.com, bvanassche@acm.org, tomas.winkler@intel.com, cang@codeaurora.org Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 3/3] scsi: ufs: Changes comment in the function ufshcd_wb_probe() Date: Sun, 6 Dec 2020 11:13:35 +0100 Message-Id: <20201206101335.3418-4-huobean@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201206101335.3418-1-huobean@gmail.com> References: <20201206101335.3418-1-huobean@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Bean Huo USFHCD supports WriteBooster "LU dedicated buffer” mode and “shared buffer” mode both, so changes the comment in the function ufshcd_wb_probe(). Signed-off-by: Bean Huo Reviewed-by: Can Guo Reviewed-by: Stanley Chu --- drivers/scsi/ufs/ufshcd.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index da38d760944b..ceb562accc39 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -7171,10 +7171,9 @@ static void ufshcd_wb_probe(struct ufs_hba *hba, u8 *desc_buf) goto wb_disabled; /* - * WB may be supported but not configured while provisioning. - * The spec says, in dedicated wb buffer mode, - * a max of 1 lun would have wb buffer configured. - * Now only shared buffer mode is supported. + * WB may be supported but not configured while provisioning. The spec + * says, in dedicated wb buffer mode, a max of 1 lun would have wb + * buffer configured. */ dev_info->b_wb_buffer_type = desc_buf[DEVICE_DESC_PARAM_WB_TYPE];