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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 X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1773088787049490513 X-GMAIL-MSGID: 1773088787049490513 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); }; /** From patchwork Wed Aug 2 03:51:19 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: 129607 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:9f41:0:b0:3e4:2afc:c1 with SMTP id v1csp216553vqx; Tue, 1 Aug 2023 22:14:42 -0700 (PDT) X-Google-Smtp-Source: APBJJlEjkmZMnVCsg9zF03uKE94cD5N33J7b8dsOXnRmriIT3nhBf+G6wenJ5nY77jNuQaBvuLCe X-Received: by 2002:a17:90a:65c5:b0:268:6f22:92dd with SMTP id i5-20020a17090a65c500b002686f2292ddmr11816423pjs.14.1690953281973; Tue, 01 Aug 2023 22:14:41 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1690953281; cv=none; d=google.com; s=arc-20160816; b=TsOcATInCQ59zc2H3ftLgLWmTacAJsB5mFAvkGekFCbwPwVQzys9tsXI5FE7JEDhNo cn6o/x/EUOvgNEM9njmgFzT6Ow4TvLdrd0eBYIBnh01j0CvyrwQTHAzwKWNoBqH2ozre 3b+2vPGwLDG5j0d5dKcdTsZBHeLLxu4f4Y6WWTxvHEHooRKrbJEuniArUO12fATbz0Zr 2HwInJ/QLRHYBDLzJissi4lwph2WitIWghizzHa4jgRe9BGt+dYzBDgHKaGEcEdX4Grn zlF7HrM1e3g1T4dKfzL9YYdsefroclfYhLnRCP8+Y9Atm22dbL/OgAKGHaWz+17SB3Gl yOZw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:references:in-reply-to:message-id:date:subject :cc:to:from:dkim-signature; bh=aCTqeYiypmylDmano3NY2XoWN7p0XG0NivnwGEdtRJ8=; fh=n1CFADIM4km2sLF4LPKt1lz1bsJfe5hWSzFV9pGmm8g=; b=TjpQtUSsDZyORXc57Z0I8D4HlFeD6JgaoOBeAtEa/D/lfxoemv0B+P/i//6c58KRJz uYujIVS9XAhnfG+z3wT8Bkd4R337dCqzE0/Rrv4yYJHDTxqpAuKgpPkEcw6V0pZ9prN6 nb+OLgHc+If87+GjMHwJZdKZlRA6cISX/qjFSDQpjAu1aidw0BBYBDws46psOEQQMrK0 r+Y7I1oMTVaJ/ArJ+DlhTidevov57lSjKDxcAYNkVksfKY4ocbFtC7DMqreO+FODS0W7 NAgJyNn0xYljB6EggP3QXWeghoMvlRatIRXraITdWoDZ5+GkSG3py3XYpCgqk48rSD40 kxag== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@quicinc.com header.s=qcppdkim1 header.b=bIkqMLh5; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=quicinc.com Received: from out1.vger.email (out1.vger.email. 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Signed-off-by: Krishna chaitanya chundru Reviewed-by: Manivannan Sadhasivam --- drivers/pci/controller/dwc/pcie-qcom-ep.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c index 0fe7f06..22545ff 100644 --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c @@ -561,6 +561,7 @@ static irqreturn_t qcom_pcie_ep_global_irq_thread(int irq, void *data) struct device *dev = pci->dev; u32 status = readl_relaxed(pcie_ep->parf + PARF_INT_ALL_STATUS); u32 mask = readl_relaxed(pcie_ep->parf + PARF_INT_ALL_MASK); + pci_power_t state; u32 dstate, val; writel_relaxed(status, pcie_ep->parf + PARF_INT_ALL_CLEAR); @@ -583,11 +584,17 @@ static irqreturn_t qcom_pcie_ep_global_irq_thread(int irq, void *data) dstate = dw_pcie_readl_dbi(pci, DBI_CON_STATUS) & DBI_CON_STATUS_POWER_STATE_MASK; dev_dbg(dev, "Received D%d state event\n", dstate); + state = dstate; if (dstate == 3) { val = readl_relaxed(pcie_ep->parf + PARF_PM_CTRL); val |= PARF_PM_CTRL_REQ_EXIT_L1; writel_relaxed(val, pcie_ep->parf + PARF_PM_CTRL); + + state = PCI_D3hot; + if (gpiod_get_value(pcie_ep->reset)) + state = PCI_D3cold; } + pci_epc_dstate_notify(pci->ep.epc, state); } else if (FIELD_GET(PARF_INT_ALL_LINK_UP, status)) { dev_dbg(dev, "Received Linkup event. 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Wed, 02 Aug 2023 03:51:27 +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 3723pOnO022483; Wed, 2 Aug 2023 03:51:24 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTPS id 3s4uukryxm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Wed, 02 Aug 2023 03:51:24 +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 3723pOXv022469; 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 3723pOTv022457; Wed, 02 Aug 2023 03:51:24 +0000 Received: by hu-sgudaval-hyd.qualcomm.com (Postfix, from userid 4058933) id 757A64B62; 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 , Manivannan Sadhasivam , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Rob Herring , Bjorn Helgaas Subject: [PATCH v5 3/4] PCI: qcom-ep: Update the D-state log Date: Wed, 2 Aug 2023 09:21:20 +0530 Message-Id: <1690948281-2143-4-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-ORIG-GUID: G_I9p1_7jruPRs3eSB6QCm5MIBm_rYJM X-Proofpoint-GUID: G_I9p1_7jruPRs3eSB6QCm5MIBm_rYJM 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=2023-08-01_22,2023-08-01_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 suspectscore=0 adultscore=0 priorityscore=1501 malwarescore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=692 phishscore=0 lowpriorityscore=0 clxscore=1011 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2308020033 X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1773092098730626656 X-GMAIL-MSGID: 1773092098730626656 Now that the state event is stored as pci_power_t, let's use the PCI helper pci_power_name() to print the state event. Signed-off-by: Krishna chaitanya chundru --- drivers/pci/controller/dwc/pcie-qcom-ep.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c index 22545ff..0c69a61 100644 --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c @@ -583,7 +583,6 @@ static irqreturn_t qcom_pcie_ep_global_irq_thread(int irq, void *data) } else if (FIELD_GET(PARF_INT_ALL_DSTATE_CHANGE, status)) { dstate = dw_pcie_readl_dbi(pci, DBI_CON_STATUS) & DBI_CON_STATUS_POWER_STATE_MASK; - dev_dbg(dev, "Received D%d state event\n", dstate); state = dstate; if (dstate == 3) { val = readl_relaxed(pcie_ep->parf + PARF_PM_CTRL); @@ -594,6 +593,7 @@ static irqreturn_t qcom_pcie_ep_global_irq_thread(int irq, void *data) if (gpiod_get_value(pcie_ep->reset)) state = PCI_D3cold; } + dev_dbg(dev, "Received %s event\n", pci_power_name(state)); pci_epc_dstate_notify(pci->ep.epc, state); } else if (FIELD_GET(PARF_INT_ALL_LINK_UP, status)) { dev_dbg(dev, "Received Linkup event. 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Wed, 02 Aug 2023 03:51:32 +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 3723pS43022512; Wed, 2 Aug 2023 03:51:28 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTPS id 3s4uukryxw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Wed, 02 Aug 2023 03:51:28 +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 3723pSSJ022504; Wed, 2 Aug 2023 03:51:28 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 3723pR5Q022503; Wed, 02 Aug 2023 03:51:28 +0000 Received: by hu-sgudaval-hyd.qualcomm.com (Postfix, from userid 4058933) id 5B7344B59; Wed, 2 Aug 2023 09:21:27 +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 , Manivannan Sadhasivam , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Kishon Vijay Abraham I , Bjorn Helgaas , Jeffrey Hugo , mhi@lists.linux.dev (open list:MHI BUS) Subject: [PATCH v5 4/4] PCI: epf-mhi: Add support for handling D-state notify from EPC Date: Wed, 2 Aug 2023 09:21:21 +0530 Message-Id: <1690948281-2143-5-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: BstDsv_bIAOsUCh53GyUGQ2obw2nsynp X-Proofpoint-ORIG-GUID: BstDsv_bIAOsUCh53GyUGQ2obw2nsynp 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 mlxscore=0 malwarescore=0 priorityscore=1501 adultscore=0 clxscore=1015 impostorscore=0 spamscore=0 bulkscore=0 phishscore=0 mlxlogscore=776 lowpriorityscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2308020033 X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1773089744727846827 X-GMAIL-MSGID: 1773089744727846827 Add support for handling D-state notify for MHI EPF. Signed-off-by: Krishna chaitanya chundru --- drivers/pci/endpoint/functions/pci-epf-mhi.c | 11 +++++++++++ include/linux/mhi_ep.h | 3 +++ 2 files changed, 14 insertions(+) diff --git a/drivers/pci/endpoint/functions/pci-epf-mhi.c b/drivers/pci/endpoint/functions/pci-epf-mhi.c index 9c1f5a1..ee91bfc 100644 --- a/drivers/pci/endpoint/functions/pci-epf-mhi.c +++ b/drivers/pci/endpoint/functions/pci-epf-mhi.c @@ -339,6 +339,16 @@ static int pci_epf_mhi_bme(struct pci_epf *epf) return 0; } +static int pci_epf_mhi_dstate_notify(struct pci_epf *epf, pci_power_t state) +{ + struct pci_epf_mhi *epf_mhi = epf_get_drvdata(epf); + struct mhi_ep_cntrl *mhi_cntrl = &epf_mhi->mhi_cntrl; + + mhi_cntrl->dstate = state; + + return 0; +} + static int pci_epf_mhi_bind(struct pci_epf *epf) { struct pci_epf_mhi *epf_mhi = epf_get_drvdata(epf); @@ -394,6 +404,7 @@ static struct pci_epc_event_ops pci_epf_mhi_event_ops = { .link_up = pci_epf_mhi_link_up, .link_down = pci_epf_mhi_link_down, .bme = pci_epf_mhi_bme, + .dstate_notify = pci_epf_mhi_dstate_notify, }; static int pci_epf_mhi_probe(struct pci_epf *epf, diff --git a/include/linux/mhi_ep.h b/include/linux/mhi_ep.h index f198a8a..c3a0685 100644 --- a/include/linux/mhi_ep.h +++ b/include/linux/mhi_ep.h @@ -8,6 +8,7 @@ #include #include +#include #define MHI_EP_DEFAULT_MTU 0x8000 @@ -139,6 +140,8 @@ struct mhi_ep_cntrl { enum mhi_state mhi_state; + pci_power_t dstate; + u32 max_chan; u32 mru; u32 event_rings;