From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yao Chen Subject: [PATCH v3 1/2] PCI: kirin: Add MSI support Date: Fri, 11 May 2018 17:15:48 +0800 Message-ID: <1526030149-23985-2-git-send-email-chenyao11@huawei.com> References: <1526030149-23985-1-git-send-email-chenyao11@huawei.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1526030149-23985-1-git-send-email-chenyao11@huawei.com> Sender: linux-kernel-owner@vger.kernel.org To: songxiaowei@hisilicon.com, wangbinghui@hisilicon.com, lorenzo.pieralisi@arm.com, bhelgaas@google.com, xuwei5@hisilicon.com, robh+dt@kernel.org, mark.rutland@arm.com, catalin.marinas@arm.com, will.deacon@arm.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org Cc: dimitrysh@google.com, guodong.xu@linaro.org, chenyao11@huawei.com, suzhuangluan@hisilicon.com, kongfei@hisilicon.com List-Id: devicetree@vger.kernel.org Add support for MSI. Signed-off-by: Yao Chen --- drivers/pci/dwc/pcie-kirin.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/drivers/pci/dwc/pcie-kirin.c b/drivers/pci/dwc/pcie-kirin.c index d2970a0..8daab1f 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 +467,26 @@ 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 < 0) { + dev_err(&pdev->dev, "failed to get MSI IRQ (%d)\n", + pci->pp.msi_irq); + 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 %d\n", + pci->pp.msi_irq); + return ret; + } + } + pci->pp.ops = &kirin_pcie_host_ops; return dw_pcie_host_init(&pci->pp); -- 1.9.1