From patchwork Thu Mar 12 13:23:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanley Chu X-Patchwork-Id: 11434183 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 8A7511668 for ; Thu, 12 Mar 2020 13:24:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6992620737 for ; Thu, 12 Mar 2020 13:24:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="pcyN5pRH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727459AbgCLNYR (ORCPT ); Thu, 12 Mar 2020 09:24:17 -0400 Received: from mailgw01.mediatek.com ([210.61.82.183]:3103 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1727372AbgCLNYB (ORCPT ); Thu, 12 Mar 2020 09:24:01 -0400 X-UUID: bf1ae25c1db94894bd7333fad6c49793-20200312 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=pcyN5pRH9SMaygnOI0ScQL2RvaG7HQtev4QnamSBZTxAboeamzEP8Z1zob2uWdn2jU+Y7i59LFYARh29FNBh4mfW6BJ1p+chgsioYrEGvI9PmvXSmTmEnbnoXxftKRoqeC4amKRTojMsYHJsZqhHPRWs8g3D0z7qCea7Df57PSg=; X-UUID: bf1ae25c1db94894bd7333fad6c49793-20200312 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw01.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.10 Build 0809 with TLS) with ESMTP id 2055070852; Thu, 12 Mar 2020 21:23:54 +0800 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; Thu, 12 Mar 2020 21:21:41 +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; Thu, 12 Mar 2020 21:21:03 +0800 From: Stanley Chu To: , , , , CC: , , , , , , , , , , , , Stanley Chu Subject: [PATCH v3 7/8] scsi: ufs: make HCE polling more compact to improve initializatoin latency Date: Thu, 12 Mar 2020 21:23:49 +0800 Message-ID: <20200312132350.18061-8-stanley.chu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20200312132350.18061-1-stanley.chu@mediatek.com> References: <20200312132350.18061-1-stanley.chu@mediatek.com> MIME-Version: 1.0 X-MTK: N Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.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 */