From patchwork Thu Apr 11 17:03:44 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manikanta Maddireddy X-Patchwork-Id: 1084198 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=pass (p=none dis=none) header.from=nvidia.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=nvidia.com header.i=@nvidia.com header.b="ZqgQCe18"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 44g6qK0nr4z9ryj for ; Fri, 12 Apr 2019 03:05:49 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727034AbfDKRFr (ORCPT ); Thu, 11 Apr 2019 13:05:47 -0400 Received: from hqemgate15.nvidia.com ([216.228.121.64]:15291 "EHLO hqemgate15.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726106AbfDKRFp (ORCPT ); Thu, 11 Apr 2019 13:05:45 -0400 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate15.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Thu, 11 Apr 2019 10:05:29 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Thu, 11 Apr 2019 10:05:45 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Thu, 11 Apr 2019 10:05:45 -0700 Received: from HQMAIL103.nvidia.com (172.20.187.11) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 11 Apr 2019 17:05:40 +0000 Received: from manikanta-bm2.nvidia.com (172.20.13.39) by HQMAIL.nvidia.com (172.20.187.11) with Microsoft SMTP Server id 15.0.1473.3 via Frontend Transport; Thu, 11 Apr 2019 17:05:37 +0000 From: Manikanta Maddireddy To: , , , , , , CC: , , , Manikanta Maddireddy Subject: [PATCH 19/30] PCI: tegra: Use legacy irq for port service drivers Date: Thu, 11 Apr 2019 22:33:44 +0530 Message-ID: <20190411170355.6882-20-mmaddireddy@nvidia.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190411170355.6882-1-mmaddireddy@nvidia.com> References: <20190411170355.6882-1-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=1555002329; bh=EcyU1AS7Mv15UFnNqbWUSrn45tq1w3Pmn/nTs6DeimE=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=ZqgQCe18RoYIMPmuxAryD7v1GPjpmiDjzGeFMZ/Vz7akSvJZOKUfV6uOPXgWcVLuq xIeLxtpr0/3ZdFQ9wogj+IymFeEUEb+PidCTZ7U7gIW+vvSZ6/OmUkuctgMwbyazUD 56BQ41MoDT3KkZlKaXQab6E+8sxPrrhP4/FvHt2CtlxroPK0mHV8fNL+UVYscK020b iS8O9lXAl15AT97igEHZhv5Dgk8FXhDf0gZsPKFliD6A8DfYIGevw6Gm0WypgdWkds MjajGGLDFCtrf+FCse9nOnHFV19cm9kcQUYOwwquDeEN7hn741VIE+SFrllEaQ7kfT xQF3/KL6qSNXQ== Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org 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 --- 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 dcfe97711cb5..11be88a394e3 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) @@ -2724,6 +2725,9 @@ static int tegra_pcie_probe(struct platform_device *pdev) goto put_resources; } + /* PME events are received over legacy INTR, so disable MSI for PME */ + pcie_pme_disable_msi(); + pm_runtime_enable(pcie->dev); err = pm_runtime_get_sync(pcie->dev); if (err) {