linux-kernel - 答复: [PATCH v5 1/1] PCI: kirin: Add MSI support

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Date:   Mon, 9 Jul 2018 01:54:07 +0000
From:   "Songxiaowei (Kirin_DRV)" <songxiaowei@...ilicon.com>
To:     "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     "chenyao (F)" <chenyao11@...wei.com>
Subject: 答复: [PATCH v5 1/1] PCI: kirin: Add MSI support

Hi Bjorn Helgaas,

Would you help to review this patch?

Best regards,

Xiaowei.

> -----邮件原件-----
> 发件人: Songxiaowei (Kirin_DRV)
> 发送时间: 2018年6月28日 20:48
> 收件人: Wangbinghui <wangbinghui@...ilicon.com>; bhelgaas@...gle.com;
> robh+dt@...nel.org; linux-pci@...r.kernel.org; linux-kernel@...r.kernel.org;
> dimitrysh@...gle.com
> 抄送: chenyao (F) <chenyao11@...wei.com>; Songxiaowei (Kirin_DRV)
> <songxiaowei@...ilicon.com>
> 主题: [PATCH v5 1/1] PCI: kirin: Add MSI support
> 
> Add support for MSI.
> 
> Signed-off-by: Xiaowei Song <songxiaowei@...ilicon.com>
> ---
>  drivers/pci/dwc/pcie-kirin.c | 28 ++++++++++++++++++++++++++++
>  1 file changed, 28 insertions(+)
> 
> diff --git a/drivers/pci/dwc/pcie-kirin.c b/drivers/pci/dwc/pcie-kirin.c index
> d2970a009eb5..6997276eb69c 100644
> --- a/drivers/pci/dwc/pcie-kirin.c
> +++ b/drivers/pci/dwc/pcie-kirin.c
> @@ -430,6 +430,9 @@ static int kirin_pcie_host_init(struct pcie_port *pp)
> {
>  	kirin_pcie_establish_link(pp);
> 
> +	if (IS_ENABLED(CONFIG_PCI_MSI))
> +		dw_pcie_msi_init(pp);
> +
>  	return 0;
>  }
> 
> @@ -445,9 +448,34 @@ static const struct dw_pcie_host_ops
> kirin_pcie_host_ops = {
>  	.host_init = kirin_pcie_host_init,
>  };
> 
> +static int kirin_pcie_add_msi(struct dw_pcie *pci,
> +				struct platform_device *pdev)
> +{
> +	int ret = 0;
> +
> +	if (IS_ENABLED(CONFIG_PCI_MSI)) {
> +		ret = platform_get_irq(pdev, 0);
> +		if (ret < 0) {
> +			dev_err(&pdev->dev,
> +				"failed to get MSI IRQ (%d)\n", ret);
> +			return ret;
> +		}
> +
> +		pci->pp.msi_irq = ret;
> +	}
> +
> +	return ret;
> +}
> +
>  static int __init kirin_add_pcie_port(struct dw_pcie *pci,
>  				      struct platform_device *pdev)  {
> +	int ret;
> +
> +	ret = kirin_pcie_add_msi(pci, pdev);
> +	if (ret)
> +		return ret;
> +
>  	pci->pp.ops = &kirin_pcie_host_ops;
> 
>  	return dw_pcie_host_init(&pci->pp);
> --
> 2.11.GIT