From mboxrd@z Thu Jan 1 00:00:00 1970 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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no 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 9F5E5C2BA19 for ; Tue, 21 Apr 2020 22:54:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6BE76206D9 for ; Tue, 21 Apr 2020 22:54:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726079AbgDUWyd (ORCPT ); Tue, 21 Apr 2020 18:54:33 -0400 Received: from alexa-out-sd-01.qualcomm.com ([199.106.114.38]:2588 "EHLO alexa-out-sd-01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725850AbgDUWyc (ORCPT ); Tue, 21 Apr 2020 18:54:32 -0400 Received: from unknown (HELO ironmsg-SD-alpha.qualcomm.com) ([10.53.140.30]) by alexa-out-sd-01.qualcomm.com with ESMTP; 21 Apr 2020 15:54:32 -0700 Received: from asutoshd-linux1.qualcomm.com ([10.46.160.39]) by ironmsg-SD-alpha.qualcomm.com with ESMTP; 21 Apr 2020 15:54:32 -0700 Received: by asutoshd-linux1.qualcomm.com (Postfix, from userid 92687) id D3A0C20A3C; Tue, 21 Apr 2020 15:54:31 -0700 (PDT) From: Asutosh Das To: cang@codeaurora.org, martin.petersen@oracle.com, Avri.Altman@wdc.com, linux-scsi@vger.kernel.org Cc: Asutosh Das , linux-arm-msm@vger.kernel.org Subject: [PATCH v1 0/3] WriteBooster Feature Support Date: Tue, 21 Apr 2020 15:54:15 -0700 Message-Id: X-Mailer: git-send-email 2.7.4 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Message-ID: <20200421225415.930Pluh6ACLaRkrQbd8JpKvj5AVbpLBeQMeFgY94OTA@z> v1 -> v2: - Refactor WriteBooster initialization, introduce ufshcd_wb_probe() - Refactor ufshcd_wb_keep_vcc_on() and introduce a new function ufshcd_wb_presrv_usrspc_keep_vcc_on() - Get the WriteBooster configuration by reading bWriteBoosterBufferPreserveUserSpaceEn RFC -> v1: - Added platform capability for WriteBooster RFC-: v1 -> v2: - Addressed comments on v1 - Supports shared buffer mode only - Didn't use exception event as suggested. The reason being while testing I saw that the WriteBooster available buffer remains at 0x1 for a longer time if flush is enabled all the time as compared to an event-based enablement. This essentially means that writes go to the WriteBooster buffer more. Spec says that the if flush is enabled, the device would flush when it sees the command queue empty. So I guess that'd trigger flush more than an event based approach. Anyway the Vcc would be turned-off during system suspend, so flush would stop anyway. In this patchset, I never turn-off flush. Hence the RFC. Asutosh Das (3): scsi: ufs: add write booster feature support ufs-qcom: scsi: configure write booster type ufs: sysfs: add sysfs entries for write booster drivers/scsi/ufs/ufs-qcom.c | 8 ++ drivers/scsi/ufs/ufs-sysfs.c | 39 ++++++- drivers/scsi/ufs/ufs.h | 37 ++++++- drivers/scsi/ufs/ufshcd.c | 241 ++++++++++++++++++++++++++++++++++++++++++- drivers/scsi/ufs/ufshcd.h | 43 ++++++++ 5 files changed, 362 insertions(+), 6 deletions(-) -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.