From patchwork Mon Dec 7 17:20:26 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jayachandran C X-Patchwork-Id: 553461 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 6CA811402C4 for ; Tue, 8 Dec 2015 03:59:33 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756295AbbLGQ7a (ORCPT ); Mon, 7 Dec 2015 11:59:30 -0500 Received: from mail-gw3-out.broadcom.com ([216.31.210.64]:35402 "EHLO mail-gw3-out.broadcom.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756270AbbLGQ73 (ORCPT ); Mon, 7 Dec 2015 11:59:29 -0500 X-IronPort-AV: E=Sophos;i="5.20,395,1444719600"; d="scan'208";a="82455501" Received: from irvexchcas06.broadcom.com (HELO IRVEXCHCAS06.corp.ad.broadcom.com) ([10.9.208.53]) by mail-gw3-out.broadcom.com with ESMTP; 07 Dec 2015 09:33:33 -0800 Received: from IRVEXCHSMTP2.corp.ad.broadcom.com (10.9.207.52) by IRVEXCHCAS06.corp.ad.broadcom.com (10.9.208.53) with Microsoft SMTP Server (TLS) id 14.3.235.1; Mon, 7 Dec 2015 08:59:28 -0800 Received: from mail-irva-13.broadcom.com (10.10.10.20) by IRVEXCHSMTP2.corp.ad.broadcom.com (10.9.207.52) with Microsoft SMTP Server id 14.3.235.1; Mon, 7 Dec 2015 08:59:28 -0800 Received: from netl-snoppy.ban.broadcom.com (unknown [10.132.128.129]) by mail-irva-13.broadcom.com (Postfix) with ESMTP id DC1D640FE9; Mon, 7 Dec 2015 08:56:00 -0800 (PST) From: Jayachandran C To: , Bjorn Helgaas , , Arnd Bergmann , CC: Jayachandran C , Lorenzo Pieralisi , Tomasz Nowicki Subject: [RFC PATCH v2 1/4] arm64: pci: Add ACPI support Date: Mon, 7 Dec 2015 22:50:26 +0530 Message-ID: <1449508829-10797-2-git-send-email-jchandra@broadcom.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1449508829-10797-1-git-send-email-jchandra@broadcom.com> References: <1449508829-10797-1-git-send-email-jchandra@broadcom.com> MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add functions needed for ACPI support on arm64. pci_acpi_scan_root(struct acpi_pci_root *root) is marked as weak so that it can be implemented by the generic acpi pci driver. pcibios_root_bridge_prepare is defined and it assumes that the sysdata is struct acpi_pci_root_info. pcibios_enable_device and pcibios_disable_device handle acpi irq enable and disable. And, pcibios_add_bus and pcibios_remove_bus have been added call the corresponding acpi functions. Signed-off-by: Jayachandran C --- arch/arm64/Kconfig | 3 +++ arch/arm64/kernel/pci.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++--- 2 files changed, 50 insertions(+), 3 deletions(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 871f217..8c93af2 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -203,6 +203,9 @@ config PCI_DOMAINS_GENERIC config PCI_SYSCALL def_bool PCI +config PCI_MMCONFIG + def_bool PCI && ACPI + source "drivers/pci/Kconfig" source "drivers/pci/pcie/Kconfig" source "drivers/pci/hotplug/Kconfig" diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c index b3d098b..ffa0ab2 100644 --- a/arch/arm64/kernel/pci.c +++ b/arch/arm64/kernel/pci.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include @@ -48,9 +49,22 @@ int pcibios_enable_device(struct pci_dev *dev, int mask) if (pci_has_flag(PCI_PROBE_ONLY)) return 0; +#ifdef CONFIG_ACPI + if (acpi_find_root_bridge_handle(dev)) + acpi_pci_irq_enable(dev); +#endif + return pci_enable_resources(dev, mask); } +void pcibios_disable_device(struct pci_dev *dev) +{ +#ifdef CONFIG_ACPI + if (acpi_find_root_bridge_handle(dev)) + acpi_pci_irq_disable(dev); +#endif +} + /* * Try to assign the IRQ number from DT when adding a new device */ @@ -77,10 +91,40 @@ int raw_pci_write(unsigned int domain, unsigned int bus, } #ifdef CONFIG_ACPI -/* Root bridge scanning */ -struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root) + +void pcibios_add_bus(struct pci_bus *bus) +{ + acpi_pci_add_bus(bus); +} + +void pcibios_remove_bus(struct pci_bus *bus) +{ + acpi_pci_remove_bus(bus); +} + +int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge) +{ + /* ACPI root bus is created with NULL parent */ + if (!acpi_disabled && bridge->dev.parent == NULL) { + struct pci_bus *b = bridge->bus; + struct acpi_pci_root_info *ci = b->sysdata; + + ACPI_COMPANION_SET(&bridge->dev, ci->bridge); + b->domain_nr = ci->root->segment; + } + return 0; +} + +/* + * Provide weak implementations of ACPI PCI hooks needed. + * Leave it to the ACPI PCI driver implementation to do it + */ +struct pci_bus *__weak pci_acpi_scan_root(struct acpi_pci_root *root) { - /* TODO: Should be revisited when implementing PCI on ACPI */ return NULL; } + +void __init __weak pci_mmcfg_late_init(void) +{ +} #endif