From patchwork Wed May 16 01:21:59 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Songxiaowei (Kirin_DRV)" X-Patchwork-Id: 914106 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=hisilicon.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 40lxWK63WYz9s1p for ; Wed, 16 May 2018 11:22:37 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752024AbeEPBWW (ORCPT ); Tue, 15 May 2018 21:22:22 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:7671 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752038AbeEPBWV (ORCPT ); Tue, 15 May 2018 21:22:21 -0400 Received: from DGGEMS414-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 15F2ED611A0AB; Wed, 16 May 2018 09:22:07 +0800 (CST) Received: from vm107-55-164.huawei.com (100.107.55.164) by DGGEMS414-HUB.china.huawei.com (10.3.19.214) with Microsoft SMTP Server id 14.3.361.1; Wed, 16 May 2018 09:22:01 +0800 From: Xiaowei Song To: , , , , , , , CC: , , , , Subject: [PATCH v4] PCI: kirin: Add MSI support Date: Wed, 16 May 2018 09:21:59 +0800 Message-ID: <20180516012159.44081-2-songxiaowei@hisilicon.com> X-Mailer: git-send-email 2.11.GIT In-Reply-To: <20180516012159.44081-1-songxiaowei@hisilicon.com> References: <20180516012159.44081-1-songxiaowei@hisilicon.com> MIME-Version: 1.0 X-Originating-IP: [100.107.55.164] X-CFilter-Loop: Reflected Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Yao Chen Add support for MSI. Signed-off-by: Yao Chen Cc: Xiaowei Song --- drivers/pci/dwc/pcie-kirin.c | 51 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/drivers/pci/dwc/pcie-kirin.c b/drivers/pci/dwc/pcie-kirin.c index d2970a0..00ca4e5 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; } @@ -445,9 +464,41 @@ 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", + pci->pp.msi_irq); + return ret; + } + + pci->pp.msi_irq = ret; + + 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; +} + 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);