From patchwork Mon May 13 18:07:35 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manikanta Maddireddy X-Patchwork-Id: 10941499 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9C9AD933 for ; Mon, 13 May 2019 18:09:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8F920283A8 for ; Mon, 13 May 2019 18:09:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 83F0A283C9; Mon, 13 May 2019 18:09:16 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1D3FE283A8 for ; Mon, 13 May 2019 18:09:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732326AbfEMSJP (ORCPT ); Mon, 13 May 2019 14:09:15 -0400 Received: from hqemgate16.nvidia.com ([216.228.121.65]:13551 "EHLO hqemgate16.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732296AbfEMSJP (ORCPT ); Mon, 13 May 2019 14:09:15 -0400 Received: from hqpgpgate102.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Mon, 13 May 2019 11:09:10 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate102.nvidia.com (PGP Universal service); Mon, 13 May 2019 11:09:14 -0700 X-PGP-Universal: processed; by hqpgpgate102.nvidia.com on Mon, 13 May 2019 11:09:14 -0700 Received: from HQMAIL107.nvidia.com (172.20.187.13) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 13 May 2019 18:09:13 +0000 Received: from manikanta-bm2.nvidia.com (172.20.13.39) by HQMAIL.nvidia.com (172.20.187.13) with Microsoft SMTP Server id 15.0.1473.3 via Frontend Transport; Mon, 13 May 2019 18:09:10 +0000 From: Manikanta Maddireddy To: , , , , , , CC: , , , Manikanta Maddireddy Subject: [PATCH V3 20/29] PCI: tegra: Use legacy IRQ for port service drivers Date: Mon, 13 May 2019 23:37:35 +0530 Message-ID: <20190513180744.16493-21-mmaddireddy@nvidia.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190513180744.16493-1-mmaddireddy@nvidia.com> References: <20190513180744.16493-1-mmaddireddy@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1557770950; bh=ecAg1RxRt4EvmCWMqp9Ru6VesTggNZyNEpKVJFe9JS8=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=QTnB8S7zAPtuwXlvFAiRDf/RMccVk37vmoZyKDzJrqg0Dg3QEkSoDC9LCnberNomE 06ND7minG1D+VleKNfcVPLxXw9Wglm7L9G1GAte3abRJ+mszwsAX86SO2IxmRDwen9 zuqum8n9emxDXk9Zu9JFGUKjXSmApiAwStQzgpeGH6dalLgL5LvviuopTFLOvbdd8y 53nkGN+g0FCcsHrMHZLS/NdgiVHXv2JWnWNwxA33QFTZws65Y5mXt6wb55D6zpZa5H ufNdyMVczKJWjhAZL/HCf+FdseQV2gYY0fncNcMbrfWd8VSkl+LnkQyQUcnpPQ+k7b EkKIX4ROWSNnw== Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Tegra signals PCIe services like AER, PME, etc. over legacy IRQ line. By default, service drivers register interrupt routine over MSI IRQ line. Use pcie_pme_disable_msi() function to disable MSI for service drivers. PME and AER interrupts registered to MSI without this change, cat /proc/interrupts | grep -i pci 36: 21 0 0 0 0 0 GICv2 104 Level PCIE 37: 35 0 0 0 0 0 GICv2 105 Level Tegra PCIe MSI 76: 0 0 0 0 0 0 Tegra PCIe MSI 0 Edge PCIe PME, aerdrv, PCIe BW notif PME and AER interrupts registered to legacy IRQ with this change, cat /proc/interrupts | grep -i pci 36: 33 0 0 0 0 0 GICv2 104 Level PCIE, PCIe PME, aerdrv, PCIe BW notif 37: 52 0 0 0 0 0 GICv2 105 Level Tegra PCIe MSI Signed-off-by: Manikanta Maddireddy Acked-by: Thierry Reding --- V3: Corrected typo in commit log V2: No change drivers/pci/controller/pci-tegra.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pci/controller/pci-tegra.c b/drivers/pci/controller/pci-tegra.c index ac57c5badd9b..0024bc42b400 100644 --- a/drivers/pci/controller/pci-tegra.c +++ b/drivers/pci/controller/pci-tegra.c @@ -41,6 +41,7 @@ #include #include "../pci.h" +#include "../pcie/portdrv.h" #define INT_PCI_MSI_NR (8 * 32) @@ -2725,6 +2726,9 @@ static int tegra_pcie_probe(struct platform_device *pdev) goto put_resources; } + /* Switch to legacy IRQ for PCIe services like AER, PME*/ + pcie_pme_disable_msi(); + pm_runtime_enable(pcie->dev); err = pm_runtime_get_sync(pcie->dev); if (err) {