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

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Message-ID: <9ff67710-362e-d0d4-2603-0c0ea6d1cce4@linaro.org>
Date:   Wed, 23 Feb 2022 13:03:56 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        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
Subject: Re: [PATCH] PCI: qcom: Add support for handling MSIs from 8 endpoints

On 14/12/2021 13:13, Manivannan Sadhasivam wrote:
> 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>

Tested-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.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 1c3d1116bb60..8a4c08d815a5 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -1550,6 +1550,7 @@ 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;
>   


-- 
With best wishes
Dmitry