From patchwork Wed Aug 2 03:51:18 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: 709290 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 AB1F9C001E0 for ; Wed, 2 Aug 2023 03:51:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232119AbjHBDvn (ORCPT ); Tue, 1 Aug 2023 23:51:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37876 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232070AbjHBDvf (ORCPT ); Tue, 1 Aug 2023 23:51:35 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BF3A81BCC; Tue, 1 Aug 2023 20:51:34 -0700 (PDT) Received: from pps.filterd (m0279867.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3722uoKr023085; Wed, 2 Aug 2023 03:51:29 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=hqWH1wZFX6/dz6P/dE70oqlC29OOIiNba9LUbBVVjm8=; b=X74NWK7GU57Tk7apQySpkI+rKr1kZKu53sGNY7Zc5IuiPkf4gr+vl09LEkqFIsrd/1aQ iEAFMkwhwQ3TwsSGEQdwF7Dva+roOJEfVbGCZuYblDgrmECFyg0ZucoTCFGGMrcwKH/V 0AiOtftiWjyNcfPVVSWVvYwV2foRMQxbsIQ+YjEhK9i7Fg4kQ8hIoRBviIzElXB1D52H VXa/ATlYFQKiqVdEiPKdXvmmHu0600WhL2z8Gs+QmjO6WNZuANGIdI717JGqgVGO28Zh QbKDA4ovzdGJVwjXMb6nu1LtATiiX9+VnMIeVxdEw2Ce5foQeBTpNm3KMe10h3QmFcso VQ== Received: from apblrppmta01.qualcomm.com (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.18.19]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3s72gqsjtj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 02 Aug 2023 03:51:28 +0000 Received: from pps.filterd (APBLRPPMTA01.qualcomm.com [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTP id 3723pOZN022480; Wed, 2 Aug 2023 03:51:25 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTPS id 3s4uukryxf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Wed, 02 Aug 2023 03:51:25 +0000 Received: from APBLRPPMTA01.qualcomm.com (APBLRPPMTA01.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 3723pO86022456; Wed, 2 Aug 2023 03:51:24 GMT Received: from hu-sgudaval-hyd.qualcomm.com (hu-krichai-hyd.qualcomm.com [10.213.110.112]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTP id 3723pNwU022448; Wed, 02 Aug 2023 03:51:24 +0000 Received: by hu-sgudaval-hyd.qualcomm.com (Postfix, from userid 4058933) id 14D944B5C; Wed, 2 Aug 2023 09:21:23 +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, quic_parass@quicinc.com, krzysztof.kozlowski@linaro.org, Krishna chaitanya chundru , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Manivannan Sadhasivam , Kishon Vijay Abraham I , Bjorn Helgaas , Jonathan Corbet , linux-doc@vger.kernel.org (open list:DOCUMENTATION) Subject: [PATCH v5 1/4] PCI: endpoint: Add D-state change notifier support Date: Wed, 2 Aug 2023 09:21:18 +0530 Message-Id: <1690948281-2143-2-git-send-email-quic_krichai@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1690948281-2143-1-git-send-email-quic_krichai@quicinc.com> References: <1690948281-2143-1-git-send-email-quic_krichai@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-GUID: pg-fQM61kHo-69Fe7pE89lzx2cOesOEs X-Proofpoint-ORIG-GUID: pg-fQM61kHo-69Fe7pE89lzx2cOesOEs 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=2023-08-02_01,2023-08-01_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=857 adultscore=0 phishscore=0 spamscore=0 lowpriorityscore=0 impostorscore=0 mlxscore=0 priorityscore=1501 malwarescore=0 bulkscore=0 clxscore=1011 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2308020033 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add support to notify the EPF device about the D-state change event from the EPC device. Signed-off-by: Krishna chaitanya chundru --- Documentation/PCI/endpoint/pci-endpoint.rst | 4 ++++ drivers/pci/endpoint/pci-epc-core.c | 27 +++++++++++++++++++++++++++ include/linux/pci-epc.h | 1 + include/linux/pci-epf.h | 1 + 4 files changed, 33 insertions(+) diff --git a/Documentation/PCI/endpoint/pci-endpoint.rst b/Documentation/PCI/endpoint/pci-endpoint.rst index 4f5622a..66f3191 100644 --- a/Documentation/PCI/endpoint/pci-endpoint.rst +++ b/Documentation/PCI/endpoint/pci-endpoint.rst @@ -78,6 +78,10 @@ by the PCI controller driver. Cleanup the pci_epc_mem structure allocated during pci_epc_mem_init(). +* pci_epc_dstate_notity() + + Notify all the function drivers that the EPC device has changed its D-state. + EPC APIs for the PCI Endpoint Function Driver ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c index 6c54fa5..4cf9c82 100644 --- a/drivers/pci/endpoint/pci-epc-core.c +++ b/drivers/pci/endpoint/pci-epc-core.c @@ -785,6 +785,33 @@ void pci_epc_bme_notify(struct pci_epc *epc) EXPORT_SYMBOL_GPL(pci_epc_bme_notify); /** + * pci_epc_dstate_notity() - Notify the EPF driver that EPC device D-state + * has changed + * @epc: the EPC device which has change in D-state + * @state: the changed D-state + * + * Invoke to Notify the EPF device that the EPC device has D-state has + * changed. + */ +void pci_epc_dstate_notity(struct pci_epc *epc, pci_power_t state) +{ + struct pci_epf *epf; + + if (!epc || IS_ERR(epc)) + return; + + mutex_lock(&epc->list_lock); + list_for_each_entry(epf, &epc->pci_epf, list) { + mutex_lock(&epf->lock); + if (epf->event_ops && epf->event_ops->dstate_notify) + epf->event_ops->dstate_notify(epf, state); + mutex_unlock(&epf->lock); + } + mutex_unlock(&epc->list_lock); +} +EXPORT_SYMBOL_GPL(pci_epc_dstate_notity); + +/** * pci_epc_destroy() - destroy the EPC device * @epc: the EPC device that has to be destroyed * diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h index 5cb6940..26a1108 100644 --- a/include/linux/pci-epc.h +++ b/include/linux/pci-epc.h @@ -251,4 +251,5 @@ void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc, phys_addr_t *phys_addr, size_t size); void pci_epc_mem_free_addr(struct pci_epc *epc, phys_addr_t phys_addr, void __iomem *virt_addr, size_t size); +void pci_epc_dstate_change(struct pci_epc *epc, pci_power_t state); #endif /* __LINUX_PCI_EPC_H */ diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h index 3f44b6a..529075b 100644 --- a/include/linux/pci-epf.h +++ b/include/linux/pci-epf.h @@ -79,6 +79,7 @@ struct pci_epc_event_ops { int (*link_up)(struct pci_epf *epf); int (*link_down)(struct pci_epf *epf); int (*bme)(struct pci_epf *epf); + int (*dstate_notify)(struct pci_epf *epf, pci_power_t state); }; /**