From patchwork Thu Jan 11 06:08:06 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manikanta Maddireddy X-Patchwork-Id: 858824 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-tegra-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3zHFnC1sjXz9t34 for ; Thu, 11 Jan 2018 17:08:47 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753426AbeAKGIo (ORCPT ); Thu, 11 Jan 2018 01:08:44 -0500 Received: from hqemgate15.nvidia.com ([216.228.121.64]:5277 "EHLO hqemgate15.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753771AbeAKGIn (ORCPT ); Thu, 11 Jan 2018 01:08:43 -0500 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate15.nvidia.com id ; Wed, 10 Jan 2018 22:08:44 -0800 Received: from HQMAIL108.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Wed, 10 Jan 2018 22:08:43 -0800 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Wed, 10 Jan 2018 22:08:43 -0800 Received: from HQMAIL101.nvidia.com (172.20.187.10) by HQMAIL108.nvidia.com (172.18.146.13) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Thu, 11 Jan 2018 06:08:42 +0000 Received: from hqnvemgw02.nvidia.com (172.16.227.111) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server id 15.0.1347.2 via Frontend Transport; Thu, 11 Jan 2018 06:08:42 +0000 Received: from manikanta-pc.nvidia.com (Not Verified[10.19.65.32]) by hqnvemgw02.nvidia.com with Trustwave SEG (v7, 5, 8, 10121) id ; Wed, 10 Jan 2018 22:08:41 -0800 From: Manikanta Maddireddy To: , , , CC: , , , , , , , , , , , Manikanta Maddireddy Subject: [PATCH V6 5/7] PCI: tegra: Add loadable kernel module support Date: Thu, 11 Jan 2018 11:38:06 +0530 Message-ID: <1515650888-9459-6-git-send-email-mmaddireddy@nvidia.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1515650888-9459-1-git-send-email-mmaddireddy@nvidia.com> References: <1515650888-9459-1-git-send-email-mmaddireddy@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org Implement remove callback function for Tegra PCIe driver to add loadable kernel module support. Change PCI_TEGRA config to tristate to allow pci-tegra driver to be build as a module. Signed-off-by: Manikanta Maddireddy Acked-by: Thierry Reding --- V2: * no change in this patch V3: * use tegra_pcie_debugfs_exit() helper function in tegra_pcie_debugfs_init() V4: * no change in this patch V5: * Decoupled from https://patchwork.ozlabs.org/patch/832053/ and rebased on linux-next V6: * no change in this patch drivers/pci/host/Kconfig | 2 +- drivers/pci/host/pci-tegra.c | 34 +++++++++++++++++++++++++++++++--- 2 files changed, 32 insertions(+), 4 deletions(-) diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig index 38d12980db0f..6fd2a5937804 100644 --- a/drivers/pci/host/Kconfig +++ b/drivers/pci/host/Kconfig @@ -34,7 +34,7 @@ config PCI_FTPCI100 default ARCH_GEMINI config PCI_TEGRA - bool "NVIDIA Tegra PCIe controller" + tristate "NVIDIA Tegra PCIe controller" depends on ARCH_TEGRA help Say Y here if you want support for the PCIe host controller found diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c index e68507f658d8..981f126b14d6 100644 --- a/drivers/pci/host/pci-tegra.c +++ b/drivers/pci/host/pci-tegra.c @@ -35,6 +35,7 @@ #include #include #include +#include #include #include #include @@ -2276,6 +2277,12 @@ static const struct file_operations tegra_pcie_ports_ops = { .release = seq_release, }; +static void tegra_pcie_debugfs_exit(struct tegra_pcie *pcie) +{ + debugfs_remove_recursive(pcie->debugfs); + pcie->debugfs = NULL; +} + static int tegra_pcie_debugfs_init(struct tegra_pcie *pcie) { struct dentry *file; @@ -2292,8 +2299,7 @@ static int tegra_pcie_debugfs_init(struct tegra_pcie *pcie) return 0; remove: - debugfs_remove_recursive(pcie->debugfs); - pcie->debugfs = NULL; + tegra_pcie_debugfs_exit(pcie); return -ENOMEM; } @@ -2311,6 +2317,7 @@ static int tegra_pcie_probe(struct platform_device *pdev) pcie = pci_host_bridge_priv(host); host->sysdata = pcie; + platform_set_drvdata(pdev, pcie); pcie->soc = of_device_get_match_data(dev); INIT_LIST_HEAD(&pcie->ports); @@ -2388,6 +2395,25 @@ static int tegra_pcie_probe(struct platform_device *pdev) return err; } +static int tegra_pcie_remove(struct platform_device *pdev) +{ + struct tegra_pcie *pcie = platform_get_drvdata(pdev); + struct pci_host_bridge *host = pci_host_bridge_from_priv(pcie); + + if (IS_ENABLED(CONFIG_DEBUG_FS)) + tegra_pcie_debugfs_exit(pcie); + pci_stop_root_bus(host->bus); + pci_remove_root_bus(host->bus); + tegra_pcie_disable_ports(pcie); + if (IS_ENABLED(CONFIG_PCI_MSI)) + tegra_pcie_disable_msi(pcie); + tegra_pcie_free_resources(pcie); + tegra_pcie_disable_controller(pcie); + tegra_pcie_put_resources(pcie); + + return 0; +} + static struct platform_driver tegra_pcie_driver = { .driver = { .name = "tegra-pcie", @@ -2395,5 +2421,7 @@ static struct platform_driver tegra_pcie_driver = { .suppress_bind_attrs = true, }, .probe = tegra_pcie_probe, + .remove = tegra_pcie_remove, }; -builtin_platform_driver(tegra_pcie_driver); +module_platform_driver(tegra_pcie_driver); +MODULE_LICENSE("GPL");