From patchwork Tue Dec 15 09:39:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanley Chu X-Patchwork-Id: 11974327 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=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, 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 0B02AC4361B for ; Tue, 15 Dec 2020 09:41:12 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 961402226A for ; Tue, 15 Dec 2020 09:41:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 961402226A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.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=PUNVJxdVwDNDVDsznoV2R0jc+MghxUpxX5wsMK6I9dI=; b=BzvVsn+Gs/5LhYe9J4OscNKHx uVLwUsC7qvGVXTDz/gx7rUTZgljCE7KD8CyzNqJX3GejD8x3JBicJ8eeaDqRZYc+6Zg6MQePAtpMA FZnbjyhsef4kBBBaTgJ67b5bwztSuPUn6t0w0Khg+IT84CztyUAbaWvS7SjHsa//uPtafWeml5xVl s9rebNJGZ/ZqfHGtkUfiO8fgxTIENC8vCYrdXIF616lTQYBd26HSYXPZzvbQpZs9gONDQBJOnnjdb hxWo2MqTeycz2sSqPYEhUcGFea2QnxvT5IBdfmsygAbKAWPjcXuhUwETRXrpt1Tlx6xdWpMBIvU1R pAyyW+78A==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kp6pJ-0003GY-Ti; Tue, 15 Dec 2020 09:41:01 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kp6oG-0002iT-Ky; Tue, 15 Dec 2020 09:39:58 +0000 X-UUID: 8826ee73147f4709849321a3aac14fe3-20201215 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=qURj1n+f9zj+bbl4eUj6wo00PE8dasZ5NKEIf9N769s=; b=KftOCjrERJo8ueZ6auHr9sYd/OuC7aCilCTxMebScu12OTazMKz21O2ZORk4CCR96qVsex9gF5oVMZLcxe+xzcXo+zV+Ut3UmFyMAb/0VDcZRcRyimBSQj93Bz87uDadAK+x7FGpAUcZV/LL3OMBAIBm3gbPap/0iGUwpaYk5b8=; X-UUID: 8826ee73147f4709849321a3aac14fe3-20201215 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1762918515; Tue, 15 Dec 2020 01:39:51 -0800 Received: from MTKMBS02N2.mediatek.inc (172.21.101.101) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 15 Dec 2020 01:39:50 -0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs02n2.mediatek.inc (172.21.101.101) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 15 Dec 2020 17:39:35 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 15 Dec 2020 17:39:36 +0800 From: Stanley Chu To: , , , , Subject: [PATCH v1 3/4] scsi: ufs: Cleanup and refactor clk-scaling feature Date: Tue, 15 Dec 2020 17:39:33 +0800 Message-ID: <20201215093934.21223-4-stanley.chu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20201215093934.21223-1-stanley.chu@mediatek.com> References: <20201215093934.21223-1-stanley.chu@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: 3CAFF49127AEEC67EFC7D1E363E3F12449FA4DAFF1E67EE4408B68ABB45E843A2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201215_043956_886497_67219E69 X-CRM114-Status: GOOD ( 12.32 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stanley Chu , alice.chao@mediatek.com, bvanassche@acm.org, andy.teng@mediatek.com, cc.chou@mediatek.com, chun-hung.wu@mediatek.com, kuohong.wang@mediatek.com, linux-kernel@vger.kernel.org, jiajie.hao@mediatek.com, cang@codeaurora.org, linux-mediatek@lists.infradead.org, peter.wang@mediatek.com, matthias.bgg@gmail.com, beanhuo@micron.com, chaotian.jing@mediatek.com, linux-arm-kernel@lists.infradead.org, asutoshd@codeaurora.org Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Manipulate clock scaling related stuff only if the host capability supports clock scaling feature to avoid redundant code execution. Signed-off-by: Stanley Chu --- drivers/scsi/ufs/ufshcd.c | 54 ++++++++++++++++++++++----------------- 1 file changed, 30 insertions(+), 24 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 9cc16598136d..15e5877411b3 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -1448,9 +1448,6 @@ static void ufshcd_suspend_clkscaling(struct ufs_hba *hba) unsigned long flags; bool suspend = false; - if (!ufshcd_is_clkscaling_supported(hba)) - return; - cancel_work_sync(&hba->clk_scaling.suspend_work); cancel_work_sync(&hba->clk_scaling.resume_work); @@ -1470,9 +1467,6 @@ static void ufshcd_resume_clkscaling(struct ufs_hba *hba) unsigned long flags; bool resume = false; - if (!ufshcd_is_clkscaling_supported(hba)) - return; - spin_lock_irqsave(hba->host->host_lock, flags); if (hba->clk_scaling.is_suspended) { resume = true; @@ -5663,7 +5657,8 @@ static void ufshcd_err_handling_prepare(struct ufs_hba *hba) ufshcd_vops_resume(hba, UFS_RUNTIME_PM); } else { ufshcd_hold(hba, false); - if (hba->clk_scaling.is_enabled) + if (ufshcd_is_clkscaling_supported(hba) && + hba->clk_scaling.is_enabled) ufshcd_suspend_clkscaling(hba); } down_write(&hba->clk_scaling_lock); @@ -5678,7 +5673,8 @@ static void ufshcd_err_handling_unprepare(struct ufs_hba *hba) down_write(&hba->clk_scaling_lock); hba->clk_scaling.is_allowed = true; up_write(&hba->clk_scaling_lock); - if (hba->clk_scaling.is_enabled) + if (ufshcd_is_clkscaling_supported(hba) && + hba->clk_scaling.is_enabled) ufshcd_resume_clkscaling(hba); pm_runtime_put(hba->dev); } @@ -8466,6 +8462,25 @@ static void ufshcd_hba_vreg_set_hpm(struct ufs_hba *hba) ufshcd_setup_hba_vreg(hba, true); } +static void ufshcd_clk_scaling_pm(struct ufs_hba *hba, bool suspend) +{ + if (suspend) { + if (hba->clk_scaling.is_enabled) + ufshcd_suspend_clkscaling(hba); + + down_write(&hba->clk_scaling_lock); + hba->clk_scaling.is_allowed = false; + up_write(&hba->clk_scaling_lock); + } else { + down_write(&hba->clk_scaling_lock); + hba->clk_scaling.is_allowed = true; + up_write(&hba->clk_scaling_lock); + + if (hba->clk_scaling.is_enabled) + ufshcd_resume_clkscaling(hba); + } +} + /** * ufshcd_suspend - helper function for suspend operations * @hba: per adapter instance @@ -8507,12 +8522,8 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) ufshcd_hold(hba, false); hba->clk_gating.is_suspended = true; - if (hba->clk_scaling.is_enabled) - ufshcd_suspend_clkscaling(hba); - - down_write(&hba->clk_scaling_lock); - hba->clk_scaling.is_allowed = false; - up_write(&hba->clk_scaling_lock); + if (ufshcd_is_clkscaling_supported(hba)) + ufshcd_clk_scaling_pm(hba, true); if (req_dev_pwr_mode == UFS_ACTIVE_PWR_MODE && req_link_state == UIC_LINK_ACTIVE_STATE) { @@ -8618,11 +8629,9 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) if (!ufshcd_set_dev_pwr_mode(hba, UFS_ACTIVE_PWR_MODE)) ufshcd_disable_auto_bkops(hba); enable_gating: - down_write(&hba->clk_scaling_lock); - hba->clk_scaling.is_allowed = true; - up_write(&hba->clk_scaling_lock); - if (hba->clk_scaling.is_enabled) - ufshcd_resume_clkscaling(hba); + if (ufshcd_is_clkscaling_supported(hba)) + ufshcd_clk_scaling_pm(hba, false); + hba->clk_gating.is_suspended = false; hba->dev_info.b_rpm_dev_flush_capable = false; ufshcd_release(hba); @@ -8719,11 +8728,8 @@ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) hba->clk_gating.is_suspended = false; - down_write(&hba->clk_scaling_lock); - hba->clk_scaling.is_allowed = true; - up_write(&hba->clk_scaling_lock); - if (hba->clk_scaling.is_enabled) - ufshcd_resume_clkscaling(hba); + if (ufshcd_is_clkscaling_supported(hba)) + ufshcd_clk_scaling_pm(hba, false); /* Enable Auto-Hibernate if configured */ ufshcd_auto_hibern8_enable(hba);