From patchwork Wed Mar 18 10:40:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanley Chu X-Patchwork-Id: 11444919 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DD78C92A for ; Wed, 18 Mar 2020 10:42:04 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 BBE5E2076D for ; Wed, 18 Mar 2020 10:42:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="a0bk+ZGq"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="k09ThN1C" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BBE5E2076D 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-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.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=r+or6npUoPttLsdR12kElJrDo8bPixOFuGUjrdXtwmQ=; b=a0bk+ZGqfsUSRG sOVy7OIvk/feBEKQ9FZLcLrx2mw56Rb38e/Vz+8PepmhMMox4ZE5L3M4ukY7G4TFDCgPXRryWahAk Moyv5w+EfpzyMyBrxEY4eQsr3QCgAx4RTrbOEi6Yk3u9at7SY2d4nDhyLk8bDMF3Gd+fcK1P+RwCd bwQ3K3HvsmRQ8S1iFivt3XreFoMK8WG936CaOvQOdnNVJXXQ0keu/DqGY09CaNZ12p6WFEODFqL6U 27/BhxQlRV0npIlC13CW8FLEdMqNI1UjMaSEr5+qCwvnVNvVa/VXpPb/BDhNbskTZbE4hZzbXF4N5 hU7iLbciFi9ni69VDD7g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jEW9C-0001Gb-W1; Wed, 18 Mar 2020 10:42:02 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jEW7p-0008N2-1f; Wed, 18 Mar 2020 10:40:40 +0000 X-UUID: 27c0047359ac42b290d7cd582a587321-20200318 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=l43Y70kKFAGzTa2uG8nek85a7oOhGxZciCH5vTIHDnc=; b=k09ThN1CtOphyopAWLDJV+rPnRSJNOh5E9mOuqTJ7s75Q0dj2yF09KdbFWi0ODeCDSmx21LNBhxFn3D7RDoMuqGoSkSw9WsQNB2035yfoymFmVcCJs9Gse2S0tkl5XUR/Ggyn31OSudoU/qhmBq5VIpIXOJEFv0bfEwPZSvDY3w=; X-UUID: 27c0047359ac42b290d7cd582a587321-20200318 Received: from mtkcas68.mediatek.inc [(172.29.94.19)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 1134907618; Wed, 18 Mar 2020 02:40:30 -0800 Received: from MTKMBS02N2.mediatek.inc (172.21.101.101) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 18 Mar 2020 03:41:01 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs02n2.mediatek.inc (172.21.101.101) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 18 Mar 2020 18:37:26 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Wed, 18 Mar 2020 18:40:31 +0800 From: Stanley Chu To: , , , , , Subject: [PATCH v7 6/7] scsi: ufs: make HCE polling more compact to improve initialization latency Date: Wed, 18 Mar 2020 18:40:15 +0800 Message-ID: <20200318104016.28049-7-stanley.chu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20200318104016.28049-1-stanley.chu@mediatek.com> References: <20200318104016.28049-1-stanley.chu@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: D8C3168073D3976E2DBE66C8C4D3BE939EBB80A91E0D434189AC87BE58D182902000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200318_034037_210640_8EDBDD03 X-CRM114-Status: UNSURE ( 9.32 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [216.200.240.184 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.0 MIME_BASE64_TEXT RAW: Message text disguised using base64 encoding -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines X-BeenThere: linux-arm-kernel@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 , andy.teng@mediatek.com, chun-hung.wu@mediatek.com, kuohong.wang@mediatek.com, linux-kernel@vger.kernel.org, cang@codeaurora.org, linux-mediatek@lists.infradead.org, peter.wang@mediatek.com, matthias.bgg@gmail.com, beanhuo@micron.com, linux-arm-kernel@lists.infradead.org, asutoshd@codeaurora.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Reduce the waiting period between each HCE (Host Controller Enable) polling from 5 ms to 1 ms. In the same time, increase the maximum polling times to make "total polling time" unchanged approximately. This change could make HCE initializatoin faster to improve latency of ufshcd initialization, error recovery, and resume behaviors. Signed-off-by: Stanley Chu Reviewed-by: Avri Altman Reviewed-by: Can Guo --- drivers/scsi/ufs/ufshcd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index c5ee77a5bfc7..8edb91b19c33 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -4304,7 +4304,7 @@ int ufshcd_hba_enable(struct ufs_hba *hba) ufshcd_delay_us(hba->hba_enable_delay_us, 100); /* wait for the host controller to complete initialization */ - retry = 10; + retry = 50; while (ufshcd_is_hba_active(hba)) { if (retry) { retry--; @@ -4313,7 +4313,7 @@ int ufshcd_hba_enable(struct ufs_hba *hba) "Controller enable failed\n"); return -EIO; } - usleep_range(5000, 5100); + usleep_range(1000, 1100); } /* enable UIC related interrupts */