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From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
To: Andy Gross <agross@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzk@kernel.org>,
	Jingoo Han <jingoohan1@gmail.com>,
	Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Stanimir Varbanov <svarbanov@mm-sol.com>,
	Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Vinod Koul <vkoul@kernel.org>,
	linux-arm-msm@vger.kernel.org, linux-pci@vger.kernel.org,
	devicetree@vger.kernel.org
Subject: [PATCH v3 3/5] PCI: qcom: Handle MSI IRQs properly
Date: Wed, 27 Apr 2022 15:16:51 +0300	[thread overview]
Message-ID: <20220427121653.3158569-4-dmitry.baryshkov@linaro.org> (raw)
In-Reply-To: <20220427121653.3158569-1-dmitry.baryshkov@linaro.org>

On Qualcomm platforms each group of 32 MSI vectors is routed to the
separate GIC interrupt. Thus to receive higher MSI vectors properly,
enable has_split_msi_irq support.

Note, that if DT doesn't list extra MSI interrupts, DWC core will limit
the amount of supported MSI vectors accordingly (to 32).

Fixes: 20f1bfb8dd62 ("PCI: qcom: Add support for handling MSIs from 8 endpoints")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 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 45631c0aa468..78c4e2bcf38a 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1587,6 +1587,7 @@ static int qcom_pcie_probe(struct platform_device *pdev)
 	pci->ops = &dw_pcie_ops;
 	pp = &pci->pp;
 	pp->num_vectors = MAX_MSI_IRQS;
+	pp->has_split_msi_irq = true;
 
 	pcie->pci = pci;
 
-- 
2.35.1


  parent reply	other threads:[~2022-04-27 12:17 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-27 12:16 [PATCH v3 0/5] PCI: qcom: Fix higher MSI vectors handling Dmitry Baryshkov
2022-04-27 12:16 ` [PATCH v3 1/5] PCI: dwc: Convert msi_irq to the array Dmitry Baryshkov
2022-04-27 14:13   ` Manivannan Sadhasivam
2022-04-27 16:59     ` Dmitry Baryshkov
2022-04-28  6:06       ` Manivannan Sadhasivam
2022-04-28  7:43         ` Dmitry Baryshkov
2022-04-28  7:47           ` Manivannan Sadhasivam
2022-04-27 12:16 ` [PATCH v3 2/5] PCI: dwc: Teach dwc core to parse additional MSI interrupts Dmitry Baryshkov
2022-04-27 12:16 ` Dmitry Baryshkov [this message]
2022-04-27 12:16 ` [PATCH v3 4/5] dt-bindings: pci/qcom,pcie: support " Dmitry Baryshkov
2022-04-28 12:05   ` Krzysztof Kozlowski
2022-04-27 12:16 ` [PATCH v3 5/5] arm64: dts: qcom: sm8250: provide " Dmitry Baryshkov

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