From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-Path: From: Yao Chen To: , , , , , , , , , , , , Subject: [PATCH v2 1/2] PCI: kirin: Add MSI support Date: Wed, 9 May 2018 16:20:11 +0800 Message-ID: <1525854012-24228-2-git-send-email-chenyao11@huawei.com> In-Reply-To: <1525854012-24228-1-git-send-email-chenyao11@huawei.com> References: <1525854012-24228-1-git-send-email-chenyao11@huawei.com> MIME-Version: 1.0 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: suzhuangluan@hisilicon.com, kongfei@hisilicon.com, dimitrysh@google.com, guodong.xu@linaro.org, chenyao11@huawei.com Content-Type: text/plain; charset="us-ascii" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+bjorn=helgaas.com@lists.infradead.org List-ID: 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..4328efe 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) { + 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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel