From patchwork Thu Mar 12 11:09:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanley Chu X-Patchwork-Id: 11433929 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 15AA31668 for ; Thu, 12 Mar 2020 11:19:40 +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 E948B20691 for ; Thu, 12 Mar 2020 11:19:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="RnA0ZHMQ"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="m1Osmp8p" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E948B20691 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=oKby26suqM/2GsMeTc3zSVFO8iuG6npCXxdfkwxcvQ8=; b=RnA0ZHMQcApjX/ bYPv6stKSVKAmBcnpRCXD7i30k3iiVzq7hXtlQacEOvZQOZ5ejLqX6A/7BV2pAEWDr/qPirSoEzDM /veV77jtTNeeuT3n8mF8brMaxkN/FeAER5rMRWhPZgMJo70JUnB8ooV9w7j8NB3QZinKksWK41Nwl wN20gMfo4qMaXA8tDe7fhnUHX5zF8Ei6zANK3TO8D3XkQrqer10MiU5STlhcZxUsjTkhuxZxZ1Ag8 sVtZ4MRMpGwz/0K8TN0bcJz5k0CHIvwnMleHsOFZdq5/AxIX6mGH4wBlKKVflupclYCjZzGRvh3su jDHxzf1wtUCFngGBMPFA==; 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 1jCLsF-0004CE-P1; Thu, 12 Mar 2020 11:19:35 +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 1jCLs3-0003w5-KB; Thu, 12 Mar 2020 11:19:25 +0000 X-UUID: 4ef984839ec6493695a8a8a32219d8fb-20200312 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=ssIHMZ3gzFIIN/d3N49O20oiYNm4fTdpyf9DffWHFP8=; b=m1Osmp8pNRA8xwUUeY/Iir/EIrinE3ont40kBOC2bPxpGYRm/Jo2D+OCOuAFVA8NcyWM6C0wfb4J1BlYSjMzzso79ub/qhp8R0s9XCIYXl9K4WZ3FyVAMak7+vF97/yuj1GVb7Bvgyjv6gozRu/MGzqmtQACfX7cawwha85CGO0=; X-UUID: 4ef984839ec6493695a8a8a32219d8fb-20200312 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 448086841; Thu, 12 Mar 2020 03:19:20 -0800 Received: from MTKMBS02N1.mediatek.inc (172.21.101.77) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 12 Mar 2020 04:09:18 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs02n1.mediatek.inc (172.21.101.77) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 12 Mar 2020 19:07:00 +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; Thu, 12 Mar 2020 19:08:51 +0800 From: Stanley Chu To: , , , , Subject: [PATCH v2 7/8] scsi: ufs: make HCE polling more compact to improve initializatoin latency Date: Thu, 12 Mar 2020 19:09:07 +0800 Message-ID: <20200312110908.14895-8-stanley.chu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20200312110908.14895-1-stanley.chu@mediatek.com> References: <20200312110908.14895-1-stanley.chu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200312_041923_678367_12206D9B X-CRM114-Status: UNSURE ( 8.96 ) 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_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid 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 , bvanassche@acm.org, 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 --- 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 dcbf45d547d8..cd33d07c56cf 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -4301,7 +4301,7 @@ int ufshcd_hba_enable(struct ufs_hba *hba) ufshcd_wait_us(hba->hba_enable_delay_us, 100, true); /* wait for the host controller to complete initialization */ - retry = 10; + retry = 50; while (ufshcd_is_hba_active(hba)) { if (retry) { retry--; @@ -4310,7 +4310,7 @@ int ufshcd_hba_enable(struct ufs_hba *hba) "Controller enable failed\n"); return -EIO; } - ufshcd_wait_us(5000, 100, true); + ufshcd_wait_us(1000, 100, true); } /* enable UIC related interrupts */