From patchwork Tue Oct 31 15:46:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mrinmay Sarkar X-Patchwork-Id: 740133 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 571D1C4167D for ; Tue, 31 Oct 2023 15:46:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345071AbjJaPqu (ORCPT ); Tue, 31 Oct 2023 11:46:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42388 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232936AbjJaPqr (ORCPT ); Tue, 31 Oct 2023 11:46:47 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C6512C9; Tue, 31 Oct 2023 08:46:44 -0700 (PDT) Received: from pps.filterd (m0279871.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 39VEYNe8023284; Tue, 31 Oct 2023 15:46:36 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=qcppdkim1; bh=cSWatxjmwn7/qjnN6C+sO+PMXsQJIfxUwRwfDKvrNcM=; b=NsU3oOXiE9cBVUPA2DqgTip9nfsVlnflCOV3uGWyy72y8G40ExOlqZNka7b+l4Z5Olqd it3z3Mwdi9qE4ApuzNP9SMkHMg2mk6wUv1cg60sOv5SRRzxZnUaxuZQ1pE9TqHw81BLt CkS84utDoDDpOeiDVLyvQJXckFp2lhaHfU9VirXuFf++dY0OK/dXSXeNRxqCLGhBjR2Z cqSMlUB8LgSZDDsZ79mb2TjK091ug4G3AZTtBAf6DtJTv6QVehrxmoJFGpPr2FFaBtI9 LYmIjyU/h14/qamJWRMiMTuIfEn3YCE8ZhI42a5JEBgfjTfHUeT4I7BDHETGAy6YKwlW Rw== Received: from apblrppmta02.qualcomm.com (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.18.19]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3u2tpx1sky-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 31 Oct 2023 15:46:36 +0000 Received: from pps.filterd (APBLRPPMTA02.qualcomm.com [127.0.0.1]) by APBLRPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTP id 39VFkHpt006276; Tue, 31 Oct 2023 15:46:33 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA02.qualcomm.com (PPS) with ESMTP id 3u0uckx0uh-1; Tue, 31 Oct 2023 15:46:33 +0000 Received: from APBLRPPMTA02.qualcomm.com (APBLRPPMTA02.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 39VFkXhw006369; Tue, 31 Oct 2023 15:46:33 GMT Received: from hu-sgudaval-hyd.qualcomm.com (hu-msarkar-hyd.qualcomm.com [10.213.111.194]) by APBLRPPMTA02.qualcomm.com (PPS) with ESMTP id 39VFkWgx006365; Tue, 31 Oct 2023 15:46:33 +0000 Received: by hu-sgudaval-hyd.qualcomm.com (Postfix, from userid 3891782) id 34D4A4BFB; Tue, 31 Oct 2023 21:16:32 +0530 (+0530) From: Mrinmay Sarkar To: agross@kernel.org, andersson@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, konrad.dybcio@linaro.org, mani@kernel.org, robh+dt@kernel.org Cc: quic_shazhuss@quicinc.com, quic_nitegupt@quicinc.com, quic_ramkri@quicinc.com, quic_nayiluri@quicinc.com, dmitry.baryshkov@linaro.org, robh@kernel.org, quic_krichai@quicinc.com, quic_vbadigan@quicinc.com, quic_parass@quicinc.com, quic_schintav@quicinc.com, quic_shijjose@quicinc.com, Mrinmay Sarkar , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Bjorn Helgaas , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org Subject: [PATCH v1 1/3] PCI: qcom: Enable cache coherency for SA8775P RC Date: Tue, 31 Oct 2023 21:16:24 +0530 Message-Id: <1698767186-5046-2-git-send-email-quic_msarkar@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1698767186-5046-1-git-send-email-quic_msarkar@quicinc.com> References: <1698767186-5046-1-git-send-email-quic_msarkar@quicinc.com> X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: AJNGcFJ47bHHblEW8H5fD3inLLx8CUJX X-Proofpoint-GUID: AJNGcFJ47bHHblEW8H5fD3inLLx8CUJX X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-31_02,2023-10-31_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=715 priorityscore=1501 mlxscore=0 suspectscore=0 clxscore=1015 spamscore=0 phishscore=0 malwarescore=0 adultscore=0 bulkscore=0 impostorscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2310240000 definitions=main-2310310125 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org This change will enable cache snooping logic to support cache coherency for SA8755P RC platform. Signed-off-by: Mrinmay Sarkar --- drivers/pci/controller/dwc/pcie-qcom.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index 6902e97..6f240fc 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -51,6 +51,7 @@ #define PARF_SID_OFFSET 0x234 #define PARF_BDF_TRANSLATE_CFG 0x24c #define PARF_SLV_ADDR_SPACE_SIZE 0x358 +#define PCIE_PARF_NO_SNOOP_OVERIDE 0x3d4 #define PARF_DEVICE_TYPE 0x1000 #define PARF_BDF_TO_SID_TABLE_N 0x2000 @@ -117,6 +118,9 @@ /* PARF_LTSSM register fields */ #define LTSSM_EN BIT(8) +/* PARF_NO_SNOOP_OVERIDE register value */ +#define NO_SNOOP_OVERIDE_EN 0xa + /* PARF_DEVICE_TYPE register fields */ #define DEVICE_TYPE_RC 0x4 @@ -961,6 +965,13 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie) static int qcom_pcie_post_init_2_7_0(struct qcom_pcie *pcie) { + struct dw_pcie *pci = pcie->pci; + struct device *dev = pci->dev; + + /* Enable cache snooping for SA8775P */ + if (of_device_is_compatible(dev->of_node, "qcom,pcie-sa8775p")) + writel(NO_SNOOP_OVERIDE_EN, pcie->parf + PCIE_PARF_NO_SNOOP_OVERIDE); + qcom_pcie_clear_hpc(pcie->pci); return 0;