From patchwork Mon Mar 16 03:42:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanley Chu X-Patchwork-Id: 11439661 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 95FF614B4 for ; Mon, 16 Mar 2020 03:53:10 +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 69ED420658 for ; Mon, 16 Mar 2020 03:53:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="bLCNzNvj"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="nlpuXPN7" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 69ED420658 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=YyQB0WpfBPyOdEUtGQrp+CqpD0dkiqkrksNTqfr6R6A=; b=bLCNzNvjdf6N9x Bs1gKpNkOY81Pyyh6pgl+iHDHG/lmRKgi/TIkMLVfXIuFxRE/xd2KCSdsqoLwlrmoAPDh4dHYGDQ7 xNFH8mbFsGSdT13386BQzextkEl/SYrKjpIfJukHVcYg7Gx7rm3BfWylnVnqwS/RbhzzI+/3yx5Pg 2oFzP5cOLtw/BwFBkaQCt6IaQcWEjBMsEb5A8KzCuAqoomBU1Rr+keVS0HbB6J8PdR1PH/jrUn4Px gbXOeCxdGgEo++Swo6sxUndcMC6o3a8C0XRb+j6nLyGSDfVZodrt2HcmSQdugbRgs43KqaqfVO2/J 8gDwx7mi8P9ZgcQQhwgw==; 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 1jDgoL-0006tO-01; Mon, 16 Mar 2020 03:53:05 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jDgnj-0006DS-At; Mon, 16 Mar 2020 03:52:29 +0000 X-UUID: 3c551a07256542d0aefec57db0da85e4-20200315 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=7YpwD2GG32xhcNkZears5WlJqU2pNhGBUQ+n78Lc3nw=; b=nlpuXPN7dly/LYxojhCWJlS1DimwRsV5FAG/PhtwdOavf87hSYy7cN3W4VMszo3vwhRTwfc7RkYEK3+ICnrCJ2odF07m5Kx1KZPtBR8TqDszDd+r3Um7fR0HB40T6EslvmuenenMbng2g38jDdzKNh8jt2UWAYHY6HGfTP4CQ1s=; X-UUID: 3c551a07256542d0aefec57db0da85e4-20200315 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 2031124511; Sun, 15 Mar 2020 19:52:24 -0800 Received: from MTKMBS02N1.mediatek.inc (172.21.101.77) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Sun, 15 Mar 2020 20:43:08 -0700 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs02n1.mediatek.inc (172.21.101.77) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 16 Mar 2020 11:40:05 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Mon, 16 Mar 2020 11:39:23 +0800 From: Stanley Chu To: , , , , Subject: [PATCH v5 7/8] scsi: ufs: make HCE polling more compact to improve initialization latency Date: Mon, 16 Mar 2020 11:42:17 +0800 Message-ID: <20200316034218.11914-8-stanley.chu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20200316034218.11914-1-stanley.chu@mediatek.com> References: <20200316034218.11914-1-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-20200315_205227_377024_52D3A910 X-CRM114-Status: UNSURE ( 8.87 ) 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 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an 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 , 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 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 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 */