From patchwork Wed Apr 8 21:48:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Asutosh Das (asd)" X-Patchwork-Id: 11480977 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 211111805 for ; Wed, 8 Apr 2020 21:49:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F2C2F2074F for ; Wed, 8 Apr 2020 21:49:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726552AbgDHVtM (ORCPT ); Wed, 8 Apr 2020 17:49:12 -0400 Received: from alexa-out-sd-02.qualcomm.com ([199.106.114.39]:44405 "EHLO alexa-out-sd-02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726409AbgDHVtM (ORCPT ); Wed, 8 Apr 2020 17:49:12 -0400 Received: from unknown (HELO ironmsg04-sd.qualcomm.com) ([10.53.140.144]) by alexa-out-sd-02.qualcomm.com with ESMTP; 08 Apr 2020 14:49:11 -0700 Received: from asutoshd-linux1.qualcomm.com ([10.46.160.39]) by ironmsg04-sd.qualcomm.com with ESMTP; 08 Apr 2020 14:49:10 -0700 Received: by asutoshd-linux1.qualcomm.com (Postfix, from userid 92687) id 976CD209D0; Wed, 8 Apr 2020 14:49:10 -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: Wed, 8 Apr 2020 14:48:38 -0700 Message-Id: X-Mailer: git-send-email 2.7.4 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org 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(-) Reviewed-by: Avri Altman