From patchwork Fri Dec 11 14:00:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bean Huo X-Patchwork-Id: 343151 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, URIBL_BLOCKED, 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 A14CBC2BBCD for ; Fri, 11 Dec 2020 14:02:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7020924051 for ; Fri, 11 Dec 2020 14:02:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2403922AbgLKOBp (ORCPT ); Fri, 11 Dec 2020 09:01:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40270 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2395136AbgLKOB3 (ORCPT ); Fri, 11 Dec 2020 09:01:29 -0500 Received: from mail-ej1-x641.google.com (mail-ej1-x641.google.com [IPv6:2a00:1450:4864:20::641]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 05CCAC061793; Fri, 11 Dec 2020 06:00:49 -0800 (PST) Received: by mail-ej1-x641.google.com with SMTP id b9so12509294ejy.0; Fri, 11 Dec 2020 06:00:48 -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=qe3W3UutNCxQuteo+hM3T7GHNA4SdG3zmVmMpwoThUk=; b=tcDrsORQxIF92mp8OsAgdY3EDdT17lbepFHKyTR8Wixh8UJrzEejFLkWVeWDltWGUJ yIPLKubXvElgWGHG/gUBQ65VBt+R4KL4IdShhtOsJ3KxR4ulIoJGileKy6P1X3c7BCS3 oeIj6m06s9PpcbzDmbJt0sm5fo86QfPgN9tGntnIwfa/vKUhnBgN8lNGBfz7M9MwMuIq 7ubO8P73Ok+fOzMPWC6pNTQx4R34FP9aUb+8yJa8odAHVJf/RLswdKXYWDxyKwAe7vXD DE4DarzDnjCeH69jUmYeODWkFXs1ZRavlByWg0ORGtKNs+U89S78HGzIR+Q9Dh5JIjm0 wfhA== 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=qe3W3UutNCxQuteo+hM3T7GHNA4SdG3zmVmMpwoThUk=; b=FXnRggKi+0ljc1xLIYjLGn4NsRec2ONCEQhQwkEhekALyRu0DFls/V3i8JIIHYUnMv GJ9V7JDbFl99M5BtrWXOKtRvs2U201pDiXxjaN9GeIIQnZ33WbxgXzsoRuQxho4TeOzz 8KJLN7kYIHPJgIu5eKzDKifrHNs9DZsy/T7Z4Lb0Pv6EtAlT35XjrzMxQHz2UgFkJqle rAv2DedZkCN3RAuQWP9GGjEDdnjzF+OZS3AWGZu/N7DIn1P8tNK/Bzlw04bln+AWWRpD MAInF84byGZwE4i5q/iUVn/0YH7Fincyp+T17BlsXZL+/yIUhew+0KsO7/fgHzIC4UJn G0bg== X-Gm-Message-State: AOAM532Dej4QZDnLfyvrCrJUZgARL/TvxemAmrDdoZzVSweR3Ns5YcxS 10bdPflEsqHzYYwQEYuI0Mk= X-Google-Smtp-Source: ABdhPJxhepqfpDA43gU+g7EjJtXaRdG8G0X06MdSY89FRKqr+1R4d1ezjDTkjiNpeLeIoTewfsd2tg== X-Received: by 2002:a17:906:4994:: with SMTP id p20mr10953922eju.391.1607695247710; Fri, 11 Dec 2020 06:00:47 -0800 (PST) Received: from localhost.localdomain (ip5f5bfce9.dynamic.kabel-deutschland.de. [95.91.252.233]) by smtp.gmail.com with ESMTPSA id z24sm7797818edr.9.2020.12.11.06.00.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 11 Dec 2020 06:00:46 -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 v4 1/6] scsi: ufs: Add "wb_on" sysfs node to control WB on/off Date: Fri, 11 Dec 2020 15:00:30 +0100 Message-Id: <20201211140035.20016-2-huobean@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201211140035.20016-1-huobean@gmail.com> References: <20201211140035.20016-1-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. Reviewed-by: Avri Altman Reviewed-by: Stanley Chu Signed-off-by: Bean Huo --- drivers/scsi/ufs/ufs-sysfs.c | 41 ++++++++++++++++++++++++++++++++++++ drivers/scsi/ufs/ufshcd.c | 3 +-- drivers/scsi/ufs/ufshcd.h | 2 ++ 3 files changed, 44 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/ufs/ufs-sysfs.c b/drivers/scsi/ufs/ufs-sysfs.c index 08e72b7eef6a..2b4e9fe935cc 100644 --- a/drivers/scsi/ufs/ufs-sysfs.c +++ b/drivers/scsi/ufs/ufs-sysfs.c @@ -189,6 +189,45 @@ 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 +235,7 @@ 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 +245,7 @@ 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 e221add25a7e..5e1dcf4de67e 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -246,7 +246,6 @@ 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); @@ -5351,7 +5350,7 @@ 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 9bb5f0ed4124..2a97006a2c93 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) {