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Wed, 10 Jul 2024 11:16:38 GMT Received: from hu-krichai-hyd.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Wed, 10 Jul 2024 04:16:33 -0700 From: Krishna chaitanya chundru Date: Wed, 10 Jul 2024 16:46:11 +0530 Subject: [PATCH v6 4/5] PCI: epf-mhi: Add wakeup host op Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20240710-wakeup_host-v6-4-ef00f31ea38d@quicinc.com> References: <20240710-wakeup_host-v6-0-ef00f31ea38d@quicinc.com> In-Reply-To: <20240710-wakeup_host-v6-0-ef00f31ea38d@quicinc.com> To: Manivannan Sadhasivam , =?utf-8?q?Krzy?= =?utf-8?q?sztof_Wilczy=C5=84ski?= , Kishon Vijay Abraham I , Bjorn Helgaas , Jonathan Corbet , Jingoo Han , Lorenzo Pieralisi , Rob Herring CC: , , , , , , , , , , "Krishna chaitanya chundru" X-Mailer: b4 0.13-dev-83828 X-Developer-Signature: v=1; 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If the D-state is in D3cold toggle wake signal, otherwise send PME. Signed-off-by: Krishna chaitanya chundru --- drivers/pci/endpoint/functions/pci-epf-mhi.c | 11 +++++++++++ include/linux/mhi_ep.h | 1 + 2 files changed, 12 insertions(+) diff --git a/drivers/pci/endpoint/functions/pci-epf-mhi.c b/drivers/pci/endpoint/functions/pci-epf-mhi.c index 6de9014e6e53..82fc52490324 100644 --- a/drivers/pci/endpoint/functions/pci-epf-mhi.c +++ b/drivers/pci/endpoint/functions/pci-epf-mhi.c @@ -708,6 +708,16 @@ static int pci_epf_mhi_dma_init(struct pci_epf_mhi *epf_mhi) return ret; } +static int pci_epf_mhi_wakeup_host(struct mhi_ep_cntrl *mhi_cntrl) +{ + struct pci_epf_mhi *epf_mhi = to_epf_mhi(mhi_cntrl); + struct pci_epf *epf = epf_mhi->epf; + struct pci_epc *epc = epf->epc; + + return pci_epc_wakeup_host(epc, epf->func_no, epf->vfunc_no, + (mhi_cntrl->dstate == PCI_D3cold) ? false : true); +} + static void pci_epf_mhi_dma_deinit(struct pci_epf_mhi *epf_mhi) { destroy_workqueue(epf_mhi->dma_wq); @@ -803,6 +813,7 @@ static int pci_epf_mhi_link_up(struct pci_epf *epf) mhi_cntrl->unmap_free = pci_epf_mhi_unmap_free; mhi_cntrl->read_sync = mhi_cntrl->read_async = pci_epf_mhi_iatu_read; mhi_cntrl->write_sync = mhi_cntrl->write_async = pci_epf_mhi_iatu_write; + mhi_cntrl->wakeup_host = pci_epf_mhi_wakeup_host; if (info->flags & MHI_EPF_USE_DMA) { mhi_cntrl->read_sync = pci_epf_mhi_edma_read; mhi_cntrl->write_sync = pci_epf_mhi_edma_write; diff --git a/include/linux/mhi_ep.h b/include/linux/mhi_ep.h index 7c9e5895ea2c..04646cf7782b 100644 --- a/include/linux/mhi_ep.h +++ b/include/linux/mhi_ep.h @@ -165,6 +165,7 @@ struct mhi_ep_cntrl { int (*write_sync)(struct mhi_ep_cntrl *mhi_cntrl, struct mhi_ep_buf_info *buf_info); int (*read_async)(struct mhi_ep_cntrl *mhi_cntrl, struct mhi_ep_buf_info *buf_info); int (*write_async)(struct mhi_ep_cntrl *mhi_cntrl, struct mhi_ep_buf_info *buf_info); + int (*wakeup_host)(struct mhi_ep_cntrl *mhi_cntrl); enum mhi_state mhi_state;