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Tue, 31 Oct 2023 15:46:37 +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 39VFdoOv032117; Tue, 31 Oct 2023 15:46:34 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA02.qualcomm.com (PPS) with ESMTP id 3u0uckx0ur-1; Tue, 31 Oct 2023 15:46:34 +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 39VFkYkj006383; Tue, 31 Oct 2023 15:46:34 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 39VFkY1Z006381; Tue, 31 Oct 2023 15:46:34 +0000 Received: by hu-sgudaval-hyd.qualcomm.com (Postfix, from userid 3891782) id BDA7D4BFB; Tue, 31 Oct 2023 21:16:33 +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 2/3] PCI: qcom-ep: Enable cache coherency for SA8775P EP Date: Tue, 31 Oct 2023 21:16:25 +0530 Message-Id: <1698767186-5046-3-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: 9j63HvsVa2RRkPPU5Z6xQah4FGL9a9tD X-Proofpoint-GUID: 9j63HvsVa2RRkPPU5Z6xQah4FGL9a9tD 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=570 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 X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on howler.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (howler.vger.email [0.0.0.0]); Tue, 31 Oct 2023 08:47:17 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1781286557283402086 X-GMAIL-MSGID: 1781286557283402086 This change will enable cache snooping logic to support cache coherency for SA8755P EP platform. Signed-off-by: Mrinmay Sarkar --- drivers/pci/controller/dwc/pcie-qcom-ep.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c index 3a53d97..bc958a0 100644 --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c @@ -47,6 +47,7 @@ #define PARF_DBI_BASE_ADDR_HI 0x354 #define PARF_SLV_ADDR_SPACE_SIZE 0x358 #define PARF_SLV_ADDR_SPACE_SIZE_HI 0x35c +#define PCIE_PARF_NO_SNOOP_OVERIDE 0x3d4 #define PARF_ATU_BASE_ADDR 0x634 #define PARF_ATU_BASE_ADDR_HI 0x638 #define PARF_SRIS_MODE 0x644 @@ -86,6 +87,9 @@ #define PARF_DEBUG_INT_CFG_BUS_MASTER_EN BIT(2) #define PARF_DEBUG_INT_RADM_PM_TURNOFF BIT(3) +/* PARF_NO_SNOOP_OVERIDE register value */ +#define NO_SNOOP_OVERIDE_EN 0xa + /* PARF_DEVICE_TYPE register fields */ #define PARF_DEVICE_TYPE_EP 0x0 @@ -489,6 +493,10 @@ static int qcom_pcie_perst_deassert(struct dw_pcie *pci) val |= BIT(8); writel_relaxed(val, pcie_ep->parf + PARF_LTSSM); + /* Enable cache snooping for SA8775P */ + if (of_device_is_compatible(dev->of_node, "qcom,sa8775p-pcie-ep")) + writel_relaxed(NO_SNOOP_OVERIDE_EN, pcie_ep->parf + PCIE_PARF_NO_SNOOP_OVERIDE); + return 0; err_disable_resources: