linux-kernel - Re: [PATCH] Kirin-PCIe: Add kirin pcie msi feature.

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Message-ID: <ce1ad9b2-e883-75be-aa4a-b7cdfc0b3f48@huawei.com>
Date:   Wed, 9 May 2018 11:41:14 +0800
From:   Yao Chen <chenyao11@...wei.com>
To:     Dmitry Shmidt <dimitrysh@...gle.com>
CC:     songxiaowei <songxiaowei@...ilicon.com>,
        Wangbinghui <wangbinghui@...ilicon.com>,
        <lorenzo.pieralisi@....com>, <bhelgaas@...gle.com>,
        <xuwei5@...ilicon.com>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <catalin.marinas@....com>,
        <will.deacon@....com>, <linux-pci@...r.kernel.org>,
        "<linux-kernel@...r.kernel.org>" <linux-kernel@...r.kernel.org>,
        "<linux-arm-kernel@...ts.infradead.org>" 
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, "Guodong Xu" <guodong.xu@...aro.org>
Subject: Re: [PATCH] Kirin-PCIe: Add kirin pcie msi feature.



On 2018/5/9 5:31, Dmitry Shmidt wrote:
> On Tue, May 8, 2018 at 12:03 AM, Yao Chen <chenyao11@...wei.com> wrote:
>> This patch adds kirin pcie msi feature.
>>
>> Signed-off-by: Yao Chen <chenyao11@...wei.com>
>> ---
>>  arch/arm64/boot/dts/hisilicon/hi3660.dtsi |  2 ++
>>  drivers/pci/dwc/pcie-kirin.c              | 38 +++++++++++++++++++++++++++++++
>>  2 files changed, 40 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi
>> index ec3eb8e..4ef684f 100644
>> --- a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi
>> +++ b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi
>> @@ -872,6 +872,8 @@
>>                                   0x0 0x02000000>;
>>                         num-lanes = <1>;
>>                         #interrupt-cells = <1>;
>> +                       interrupts = <0 283 4>;
>> +                       interrupts-names = "msi";
> 
> Possible typo? Should be interrupt-names = "msi";

Yes, you're right. It should be interrupt-names = "msi". I will fix it. Thanks.

> 
>>                         interrupt-map-mask = <0xf800 0 0 7>;
>>                         interrupt-map = <0x0 0 0 1
>>                                          &gic GIC_SPI 282 IRQ_TYPE_LEVEL_HIGH>,
>> diff --git a/drivers/pci/dwc/pcie-kirin.c b/drivers/pci/dwc/pcie-kirin.c
>> index d2970a0..2319c9c 100644
>> --- a/drivers/pci/dwc/pcie-kirin.c
>> +++ b/drivers/pci/dwc/pcie-kirin.c
>> @@ -426,9 +426,28 @@ static int kirin_pcie_establish_link(struct pcie_port *pp)
>>         return 0;
>>  }
>>
>> +static irqreturn_t kirin_pcie_msi_irq_handler(int irq, void *arg)
>> +{
>> +       struct pcie_port *pp = arg;
>> +
>> +       return dw_handle_msi_irq(pp);
>> +}
>> +
>> +static void kirin_pcie_msi_init(struct pcie_port *pp)
>> +{
>> +       dw_pcie_msi_init(pp);
>> +}
>> +
>> +static void kirin_pcie_enable_interrupts(struct pcie_port *pp)
>> +{
>> +       if (IS_ENABLED(CONFIG_PCI_MSI))
>> +               kirin_pcie_msi_init(pp);
>> +}
>> +
>>  static int kirin_pcie_host_init(struct pcie_port *pp)
>>  {
>>         kirin_pcie_establish_link(pp);
>> +       kirin_pcie_enable_interrupts(pp);
>>
>>         return 0;
>>  }
>> @@ -448,6 +467,25 @@ static int kirin_pcie_host_init(struct pcie_port *pp)
>>  static int __init kirin_add_pcie_port(struct dw_pcie *pci,
>>                                       struct platform_device *pdev)
>>  {
>> +       int ret;
>> +
>> +       if (IS_ENABLED(CONFIG_PCI_MSI)) {
>> +               pci->pp.msi_irq = platform_get_irq(pdev, 0);
>> +               if (!pci->pp.msi_irq) {
>> +                       dev_err(&pdev->dev, "failed to get msi irq\n");
>> +                       return -ENODEV;
>> +               }
>> +               ret = devm_request_irq(&pdev->dev, pci->pp.msi_irq,
>> +                                      kirin_pcie_msi_irq_handler,
>> +                                      IRQF_SHARED | IRQF_NO_THREAD,
>> +                                      "kirin_pcie_msi", &pci->pp);
>> +               if (ret) {
>> +                       dev_err(&pdev->dev, "failed to request msi irq\n");
>> +                       return ret;
>> +               }
>> +       }
>> +
>> +       pci->pp.root_bus_nr = -1;
>>         pci->pp.ops = &kirin_pcie_host_ops;
>>
>>         return dw_pcie_host_init(&pci->pp);
>> --
>> 1.9.1
>>
> 
> .
>