linux-kernel - [PATCH v2] PCI: qcom: Add support for handling MSIs from 8 endpoints

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Message-Id: <20220210144745.135721-1-manivannan.sadhasivam@linaro.org>
Date:   Thu, 10 Feb 2022 20:17:45 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     lorenzo.pieralisi@....com, bhelgaas@...gle.com
Cc:     svarbanov@...sol.com, bjorn.andersson@...aro.org, robh@...nel.org,
        linux-pci@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH v2] PCI: qcom: Add support for handling MSIs from 8 endpoints

The DWC controller used in the Qcom Platforms are capable of addressing the
MSIs generated from 8 different endpoints each with 32 vectors (256 in
total). Currently the driver is using the default value of addressing the
MSIs from 1 endpoint only. Extend it by passing the MAX_MSI_IRQS to the
num_vectors field of pcie_port structure.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---

Changes in v2:

* Rebased on top of v5.17-rc1

 drivers/pci/controller/dwc/pcie-qcom.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index c19cd506ed3f..03e766f6937e 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1556,6 +1556,7 @@ static int qcom_pcie_probe(struct platform_device *pdev)
 	pci->dev = dev;
 	pci->ops = &dw_pcie_ops;
 	pp = &pci->pp;
+	pp->num_vectors = MAX_MSI_IRQS;
 
 	pcie->pci = pci;
 
-- 
2.25.1