From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752865AbeEKJQF (ORCPT ); Fri, 11 May 2018 05:16:05 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:56457 "EHLO huawei.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752165AbeEKJQC (ORCPT ); Fri, 11 May 2018 05:16:02 -0400 From: Yao Chen To: , , , , , , , , , , , , CC: , , , , 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> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1526030149-23985-1-git-send-email-chenyao11@huawei.com> References: <1526030149-23985-1-git-send-email-chenyao11@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.143.148.75] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@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