From patchwork Fri Jul 7 11:03:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krishna Chaitanya Chundru X-Patchwork-Id: 13304732 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 29F4DEB64DA for ; Fri, 7 Jul 2023 11:04:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230414AbjGGLEi (ORCPT ); Fri, 7 Jul 2023 07:04:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59810 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230028AbjGGLEg (ORCPT ); Fri, 7 Jul 2023 07:04:36 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F0A8A212B; Fri, 7 Jul 2023 04:04:28 -0700 (PDT) Received: from pps.filterd (m0279865.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3679G1Qx020337; Fri, 7 Jul 2023 11:04:25 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id; s=qcppdkim1; bh=l15t62Tr53wbsga4FHT8TE6qtVXyNR0Rgnu51XUnGAo=; b=n6OY4zIsI9uuzK05J1zTvl7Bki7CphGlM3JDMzGaMtzd35xpmrhDPI0eS2XLAtsDqC+u COW0oh/tM9JKm/3/wVn/wbulzWBJBEsCM80vITxoI7K0q5/zx3xMvreNU0dpMApiGRpT bu3dHYovTSOoSxMaH7liJVTJr31kPLZzzY5dsjh7/TNm/A/ozKLPIeLR4xBYUiB6il+K pHcd8bfAdsHa67T7n5wdf8ebJBXK8aoIBjCKkg7R/g+t5GW2+ib+JIubdAsXzE68qwLh R5lnsbW/qC+zfzdHKJNkskdjpof6o5NoeVh7L9F5IP8hO/Cdk4So8xBaqoYD2uOhdtpo cw== 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 3rp96vs8pe-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 07 Jul 2023 11:04:25 +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 367B3xAf022730; Fri, 7 Jul 2023 11:03:59 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA02.qualcomm.com (PPS) with ESMTPS id 3rjd7kq588-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Fri, 07 Jul 2023 11:03:59 +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 367B3xNS022714; Fri, 7 Jul 2023 11:03:59 GMT Received: from hu-sgudaval-hyd.qualcomm.com (hu-krichai-hyd.qualcomm.com [10.213.110.112]) by APBLRPPMTA02.qualcomm.com (PPS) with ESMTP id 367B3xP7022711; Fri, 07 Jul 2023 11:03:59 +0000 Received: by hu-sgudaval-hyd.qualcomm.com (Postfix, from userid 4058933) id 765A846E0; Fri, 7 Jul 2023 16:33:58 +0530 (+0530) From: Krishna chaitanya chundru To: manivannan.sadhasivam@linaro.org Cc: helgaas@kernel.org, linux-pci@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, quic_vbadigan@quicinc.com, quic_nitegupt@quicinc.com, quic_skananth@quicinc.com, quic_ramkri@quicinc.com, krzysztof.kozlowski@linaro.org, Krishna chaitanya chundru Subject: [PATCH v3 0/9] PCI: EPC: Add support to wake up host from D3 states Date: Fri, 7 Jul 2023 16:33:47 +0530 Message-Id: <1688727836-11141-1-git-send-email-quic_krichai@quicinc.com> X-Mailer: git-send-email 2.7.4 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: tNbf--oTcO6NG3RNoLw-_HyZUwB-31ME X-Proofpoint-GUID: tNbf--oTcO6NG3RNoLw-_HyZUwB-31ME X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-07_07,2023-07-06_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 suspectscore=0 clxscore=1015 impostorscore=0 priorityscore=1501 bulkscore=0 lowpriorityscore=0 adultscore=0 malwarescore=0 spamscore=0 mlxlogscore=385 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2307070103 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Here we propose this patch series to add support in PCI endpoint driver to wake up host from D3 states. As endpoint cannot send any data/MSI when the D-state is in D3cold or D3hot. Endpoint needs to bring the device back to D0 to send any kind of data. For this endpoint needs to send inband PME the device is in D3 state or toggle wake when the device is D3 cold and vaux is not supplied. As EPF doestn't know the D-state of the PCI, added a notify op whenever device state changes. Based on the D-state the EPF driver decides to wake host either by toggling wake or by sending PME. When the MHI state is in M3 MHI driver will wakeup the host using the wakeup op. Changes from v2: - Addressed review comments made by mani. Changes from v1: - Moved from RFC patch to regular patch - Inclueded EPF patch and added a new op patch to notify D-state change *** BLURB HERE *** Krishna chaitanya chundru (9): PCI: endpoint: Add dstate change notifier support PCI: qcom-ep: Add support for D-state change notification PCI: qcom-ep: Update the D-state log PCI: epf-mhi: Add support for handling D-state notify from EPC PCI: endpoint: Add wakeup host API to EPC core pci: dwc: Add wakeup host op to pci_epc_ops PCI: qcom-ep: Add wake up host op to dw_pcie_ep_ops PCI: epf-mhi: Add wakeup host op bus: mhi: ep: wake up host is the MHI state is in M3 Documentation/PCI/endpoint/pci-endpoint.rst | 11 +++++ drivers/bus/mhi/ep/main.c | 28 ++++++++++++ drivers/pci/controller/dwc/pcie-designware-ep.c | 12 +++++ drivers/pci/controller/dwc/pcie-designware.h | 3 ++ drivers/pci/controller/dwc/pcie-qcom-ep.c | 36 ++++++++++++++- drivers/pci/endpoint/functions/pci-epf-mhi.c | 28 ++++++++++++ drivers/pci/endpoint/pci-epc-core.c | 58 +++++++++++++++++++++++++ include/linux/mhi_ep.h | 4 ++ include/linux/pci-epc.h | 12 +++++ include/linux/pci-epf.h | 1 + 10 files changed, 192 insertions(+), 1 deletion(-)