From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754341AbcHZRYd (ORCPT ); Fri, 26 Aug 2016 13:24:33 -0400 Received: from mga06.intel.com ([134.134.136.31]:1156 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753393AbcHZRYH (ORCPT ); Fri, 26 Aug 2016 13:24:07 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.28,581,1464678000"; d="scan'208";a="753867632" From: Keith Busch To: linux-pci@vger.kernel.org, Bjorn Helgaas , Thomas Gleixner Cc: LKML , x86@kernel.org, Keith Busch Subject: [PATCHv2 2/2] x86/vmd: Add PCI domain specific LED option Date: Fri, 26 Aug 2016 11:23:02 -0600 Message-Id: <1472232182-1448-3-git-send-email-keith.busch@intel.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1472232182-1448-1-git-send-email-keith.busch@intel.com> References: <1472232182-1448-1-git-send-email-keith.busch@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds a new function to set PCI domain specific options as devices are added. The usage included in this patch is for LED indicator control in VMD domains, but may be extended in the future as new domain specific options are required. PCIe LED Slot Control in a VMD domain is repurposed to a non-standard implementation. As such, all devices in a VMD domain will be flagged so that pciehp does not attempt to use LED indicators. This user_led flag has pciehp provide a different sysfs entry for user exclusive control over the domain's slot indicators. In order to determine if a bus is within a PCI domain, the patch appends a bool to the pci_sysdata structure that the VMD driver sets during initialization. Requested-by: Kapil Karkra Tested-by: Artur Paszkiewicz Signed-off-by: Keith Busch --- arch/x86/include/asm/pci.h | 14 ++++++++++++++ arch/x86/pci/common.c | 7 +++++++ arch/x86/pci/vmd.c | 1 + 3 files changed, 22 insertions(+) diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h index 9ab7507..1411dbe 100644 --- a/arch/x86/include/asm/pci.h +++ b/arch/x86/include/asm/pci.h @@ -23,6 +23,9 @@ struct pci_sysdata { #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN void *fwnode; /* IRQ domain for MSI assignment */ #endif +#if IS_ENABLED(CONFIG_VMD) + bool vmd_domain; /* True if in Intel VMD domain */ +#endif }; extern int pci_routeirq; @@ -56,6 +59,17 @@ static inline void *_pci_root_bus_fwnode(struct pci_bus *bus) #define pci_root_bus_fwnode _pci_root_bus_fwnode #endif +static inline bool is_vmd(struct pci_bus *bus) +{ +#if IS_ENABLED(CONFIG_VMD) + struct pci_sysdata *sd = bus->sysdata; + + return sd->vmd_domain; +#else + return false; +#endif +} + /* Can be used to override the logic in pci_scan_bus for skipping already-configured bus numbers - to be used for buggy BIOSes or architectures with incomplete PCI setup by the loader */ diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c index 7b6a9d1..ccf696c 100644 --- a/arch/x86/pci/common.c +++ b/arch/x86/pci/common.c @@ -677,6 +677,12 @@ static void set_dma_domain_ops(struct pci_dev *pdev) static void set_dma_domain_ops(struct pci_dev *pdev) {} #endif +static void set_dev_domain_options(struct pci_dev *pdev) +{ + if (is_vmd(pdev->bus)) + pdev->user_leds = 1; +} + int pcibios_add_device(struct pci_dev *dev) { struct setup_data *data; @@ -707,6 +713,7 @@ int pcibios_add_device(struct pci_dev *dev) iounmap(data); } set_dma_domain_ops(dev); + set_dev_domain_options(dev); return 0; } diff --git a/arch/x86/pci/vmd.c b/arch/x86/pci/vmd.c index b73da50..3014f8e 100644 --- a/arch/x86/pci/vmd.c +++ b/arch/x86/pci/vmd.c @@ -604,6 +604,7 @@ static int vmd_enable_domain(struct vmd_dev *vmd) .parent = res, }; + sd->vmd_domain = true; sd->domain = vmd_find_free_domain(); if (sd->domain < 0) return sd->domain; -- 2.7.2