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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id D3899C4167B for ; Mon, 11 Dec 2023 09:57:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:References:CC:To:Subject:From:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=eZz2NH0MpC5WvnNslfBa0k9lf1A6RK8ts/s7dSoDI9g=; b=2UeRISs7/pFNDOmk3DJAgTZzkt gw/0TLT7EAHwbcQW8QWsWozxBfpGWYnszTs2GNevKLazMr6ailGXpAy6okXbJmIYVi088gOEgO9jN bUd9MKLDZi+RVSdvNbatvqMhWwvKZWOr2fTZZFnJJf3A6PzkFic5/QxcOog82nip2NY52h3hMElT3 dnbxYr0zdTEKB8h++GJru8OzZ1cdDkcWXRXdzCHK9/zTSA/GdscY51uwPVSbj+0ZDRVMlYe0eHF7A nm8Iszlk1ZHS6fL5gsd8mSTFIlMiKMTHYCJnwyigwV4Fa+Y89yL2YfHP5jOpIyPyG8B0hKZn4K5y6 GIcbZgaQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rCd24-004Wwn-0R; Mon, 11 Dec 2023 09:57:00 +0000 Received: from mx0b-0031df01.pphosted.com ([205.220.180.131]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1rCd1z-004Wum-1G; Mon, 11 Dec 2023 09:56:58 +0000 Received: from pps.filterd (m0279868.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 3BB8vQIw002804; Mon, 11 Dec 2023 09:56:29 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= message-id:date:mime-version:from:subject:to:cc:references :in-reply-to:content-type:content-transfer-encoding; s= qcppdkim1; bh=eZz2NH0MpC5WvnNslfBa0k9lf1A6RK8ts/s7dSoDI9g=; b=Mc PXVTDPGbgxwLNKw1SoIs/vIYK4F/8cFrAAWt9E7Fd5qIWWGKNNerJ1/FffgWm0O5 rHTKhE102XCx7No1pegnrk3GvEKK3ax+x0CM68qBmfS2tYQRfGaVGnRytMgNA44c iiP0sJIUxy9MahCRHFVoIcA7nmSzNdlCqX305tuLbk988r0JvNcKS6dID3/OEqJw T3pKTwxCczsLarvtZPkwzg09bq9VcOnR1wHP5RO8Rg4NM0bT7vAkGtJ0yKEbzANu CEHEKnGVwt19eohz9xgEnFWaPIc6fwRzAICdQLeFtOO5dVz8KF1avUDHwNhaldPg SEWV+MT+bdQYw/iLN7Zg== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3uvnnstv8g-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 11 Dec 2023 09:56:28 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA03.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3BB9uPdX017166 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 11 Dec 2023 09:56:26 GMT Received: from [10.217.219.220] (10.80.80.8) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Mon, 11 Dec 2023 01:56:19 -0800 Message-ID: <9330ff38-5285-43d8-bf90-3441762fdb9c@quicinc.com> Date: Mon, 11 Dec 2023 15:26:16 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Naresh Maramaina Subject: Re: [PATCH V2 1/3] ufs: core: Add CPU latency QoS support for ufs driver To: Manivannan Sadhasivam CC: "James E.J. Bottomley" , "Martin K. Petersen" , Peter Wang , "Andy Gross" , Bjorn Andersson , "Konrad Dybcio" , Matthias Brugger , AngeloGioacchino Del Regno , , Alim Akhtar , Avri Altman , Bart Van Assche , , , , , , , , Nitin Rawat References: <20231204143101.64163-1-quic_mnaresh@quicinc.com> <20231204143101.64163-2-quic_mnaresh@quicinc.com> <20231206152646.GH12802@thinkpad> Content-Language: en-US In-Reply-To: <20231206152646.GH12802@thinkpad> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: 8EL01U5GejapoCFeM0qsMjrDVxFEs5iU X-Proofpoint-GUID: 8EL01U5GejapoCFeM0qsMjrDVxFEs5iU X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-09_02,2023-12-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 phishscore=0 spamscore=0 priorityscore=1501 adultscore=0 malwarescore=0 mlxlogscore=999 clxscore=1015 mlxscore=0 bulkscore=0 lowpriorityscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2312110080 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231211_015655_567842_F029D40B X-CRM114-Status: GOOD ( 26.45 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On 12/6/2023 8:56 PM, Manivannan Sadhasivam wrote: > On Mon, Dec 04, 2023 at 08:00:59PM +0530, Maramaina Naresh wrote: >> Register ufs driver to CPU latency PM QoS framework can improves >> ufs device random io performance. >> >> PM QoS initialization will insert new QoS request into the CPU >> latency QoS list with the maximum latency PM_QOS_DEFAULT_VALUE >> value. >> >> UFS driver will vote for performance mode on scale up and power >> save mode for scale down. >> >> If clock scaling feature is not enabled then voting will be based >> on clock on or off condition. >> >> tiotest benchmark tool io performance results on sm8550 platform: >> >> 1. Without PM QoS support >> Type (Speed in) | Average of 18 iterations >> Random Write(IPOS) | 41065.13 >> Random Read(IPOS) | 37101.3 >> >> 2. With PM QoS support >> Type (Speed in) | Average of 18 iterations >> Random Write(IPOS) | 46784.9 >> Random Read(IPOS) | 42943.4 >> (Improvement % with PM QoS = ~15%). >> >> Co-developed-by: Nitin Rawat >> Signed-off-by: Nitin Rawat >> Signed-off-by: Naveen Kumar Goud Arepalli >> Signed-off-by: Maramaina Naresh >> --- >> drivers/ufs/core/ufshcd-priv.h | 8 +++++ >> drivers/ufs/core/ufshcd.c | 62 ++++++++++++++++++++++++++++++++++ >> include/ufs/ufshcd.h | 16 +++++++++ >> 3 files changed, 86 insertions(+) >> >> diff --git a/drivers/ufs/core/ufshcd-priv.h b/drivers/ufs/core/ufshcd-priv.h >> index f42d99ce5bf1..536805f6c4e1 100644 >> --- a/drivers/ufs/core/ufshcd-priv.h >> +++ b/drivers/ufs/core/ufshcd-priv.h >> @@ -241,6 +241,14 @@ static inline void ufshcd_vops_config_scaling_param(struct ufs_hba *hba, >> hba->vops->config_scaling_param(hba, p, data); >> } >> >> +static inline u32 ufshcd_vops_config_qos_vote(struct ufs_hba *hba) >> +{ >> + if (hba->vops && hba->vops->config_qos_vote) >> + return hba->vops->config_qos_vote(hba); > > Please remove this callback as Bart noted. > Sure Mani, will takecare of this comment. >> + >> + return UFSHCD_QOS_DEFAULT_VOTE; >> +} >> + >> static inline void ufshcd_vops_reinit_notify(struct ufs_hba *hba) >> { >> if (hba->vops && hba->vops->reinit_notify) >> diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c >> index ae9936fc6ffb..13370febd2b5 100644 >> --- a/drivers/ufs/core/ufshcd.c >> +++ b/drivers/ufs/core/ufshcd.c >> @@ -1001,6 +1001,20 @@ static bool ufshcd_is_unipro_pa_params_tuning_req(struct ufs_hba *hba) >> return ufshcd_get_local_unipro_ver(hba) < UFS_UNIPRO_VER_1_6; >> } >> >> +/** >> + * ufshcd_pm_qos_perf - vote for PM QoS performance or power save mode > > ufshcd_pm_qos_update() - Update PM QoS request > Sure Mani, will takecare of this comment. >> + * @hba: per adapter instance >> + * @on: If True, vote for perf PM QoS mode otherwise power save mode >> + */ >> +static void ufshcd_pm_qos_perf(struct ufs_hba *hba, bool on) >> +{ >> + if (!hba->pm_qos_init) >> + return; >> + >> + cpu_latency_qos_update_request(&hba->pm_qos_req, on ? hba->qos_vote >> + : PM_QOS_DEFAULT_VALUE); >> +} >> + >> /** >> * ufshcd_set_clk_freq - set UFS controller clock frequencies >> * @hba: per adapter instance >> @@ -1153,6 +1167,10 @@ static int ufshcd_scale_clks(struct ufs_hba *hba, unsigned long freq, >> trace_ufshcd_profile_clk_scaling(dev_name(hba->dev), >> (scale_up ? "up" : "down"), >> ktime_to_us(ktime_sub(ktime_get(), start)), ret); >> + >> + if (!ret) >> + ufshcd_pm_qos_perf(hba, scale_up); > > Can't you just move this before trace_ufshcd_profile_clk_scaling()? This also > avoids checking for !ret. > In this case, we need to use goto out; inside if condition of ufshcd_vops_clk_scale_notify. we can enable ufshcd_pm_qos_perf only when ufshcd_vops_clk_scale_notify is successful. Will add goto out; in next patch set. >> + >> return ret; >> } >> >> @@ -9204,6 +9222,8 @@ static int ufshcd_setup_clocks(struct ufs_hba *hba, bool on) >> if (ret) >> return ret; >> >> + if (!ufshcd_is_clkscaling_supported(hba)) >> + ufshcd_pm_qos_perf(hba, on); >> out: >> if (ret) { >> list_for_each_entry(clki, head, list) { >> @@ -9296,6 +9316,45 @@ static int ufshcd_init_clocks(struct ufs_hba *hba) >> return ret; >> } >> >> +/** >> + * ufshcd_pm_qos_init - initialize PM QoS instance > > "Initialize PM QoS request" > Sure Mani, will takecare of this comment. >> + * @hba: per adapter instance >> + */ >> +static void ufshcd_pm_qos_init(struct ufs_hba *hba) >> +{ >> + if (!(hba->caps & UFSHCD_CAP_PM_QOS)) >> + return; >> + >> + /* >> + * called to configure PM QoS vote value for UFS host, >> + * expecting qos vote return value from caller else >> + * default vote value will be return. >> + */ >> + hba->qos_vote = ufshcd_vops_config_qos_vote(hba); > > No need of this variable too if you get rid of the callback. > >> + cpu_latency_qos_add_request(&hba->pm_qos_req, >> + PM_QOS_DEFAULT_VALUE); >> + >> + if (cpu_latency_qos_request_active(&hba->pm_qos_req)) >> + hba->pm_qos_init = true; > > Why do you need this flag? this flag ensure UFS qos request got added into the list. > >> + >> + dev_dbg(hba->dev, "%s: QoS %s, qos_vote: %u\n", __func__, >> + hba->pm_qos_init ? "initialized" : "uninitialized", >> + hba->qos_vote); >> +} >> + >> +/** >> + * ufshcd_pm_qos_exit - remove instance from PM QoS >> + * @hba: per adapter instance >> + */ >> +static void ufshcd_pm_qos_exit(struct ufs_hba *hba) >> +{ >> + if (!hba->pm_qos_init) >> + return; >> + >> + cpu_latency_qos_remove_request(&hba->pm_qos_req); >> + hba->pm_qos_init = false; >> +} >> + > > [...] > >> /** >> * struct ufs_hba - per adapter private structure >> * @mmio_base: UFSHCI base register address >> @@ -912,6 +923,8 @@ enum ufshcd_mcq_opr { >> * @mcq_base: Multi circular queue registers base address >> * @uhq: array of supported hardware queues >> * @dev_cmd_queue: Queue for issuing device management commands >> + * @pm_qos_req: PM QoS request handle >> + * @pm_qos_init: flag to check if pm qos init completed >> */ >> struct ufs_hba { >> void __iomem *mmio_base; >> @@ -1076,6 +1089,9 @@ struct ufs_hba { >> struct ufs_hw_queue *uhq; >> struct ufs_hw_queue *dev_cmd_queue; >> struct ufshcd_mcq_opr_info_t mcq_opr[OPR_MAX]; >> + struct pm_qos_request pm_qos_req; >> + bool pm_qos_init; >> + u32 qos_vote; > > Order doesn't match Kdoc. > qos_vote variable will be remove as per latest comment. > - Mani > Thanks, Naresh.