From patchwork Tue Oct 27 02:57:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuppuswamy Sathyanarayanan X-Patchwork-Id: 11859291 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8C09314B7 for ; Tue, 27 Oct 2020 02:57:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7336220872 for ; Tue, 27 Oct 2020 02:57:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2409635AbgJ0C5f (ORCPT ); Mon, 26 Oct 2020 22:57:35 -0400 Received: from mga01.intel.com ([192.55.52.88]:23076 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2408638AbgJ0C5S (ORCPT ); Mon, 26 Oct 2020 22:57:18 -0400 IronPort-SDR: k9LXPaLOUvjOaEvYSHuNve44gCgZ4q/ghqN5XQh6sFf7G4stcK/5X78Wauf6a+Kf5S1KPEllRn e1BEPlvqdNqw== X-IronPort-AV: E=McAfee;i="6000,8403,9786"; a="185753259" X-IronPort-AV: E=Sophos;i="5.77,422,1596524400"; d="scan'208";a="185753259" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Oct 2020 19:57:16 -0700 IronPort-SDR: d4hvBBycX6AGydoJc+ue4PGemdyHhIFK2h592N7wQ9UXg0Fn3ud4KAk/xutAzrgsDRRLJN5+Rm kZZzKmmOPXXw== X-IronPort-AV: E=Sophos;i="5.77,422,1596524400"; d="scan'208";a="322772473" Received: from dhrubajy-mobl.amr.corp.intel.com (HELO skuppusw-mobl5.amr.corp.intel.com) ([10.254.101.53]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Oct 2020 19:57:16 -0700 From: Kuppuswamy Sathyanarayanan To: bhelgaas@google.com Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, ashok.raj@intel.com, sathyanarayanan.kuppuswamy@linux.intel.com, knsathya@kernel.org Subject: [PATCH v11 2/5] ACPI/PCI: Ignore _OSC negotiation result if pcie_ports_native is set. Date: Mon, 26 Oct 2020 19:57:05 -0700 Message-Id: X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org pcie_ports_native is set only if user requests native handling of PCIe capabilities via pcie_port_setup command line option. User input takes precedence over _OSC based control negotiation result. So consider the _OSC negotiated result only if pcie_ports_native is unset. Also, since struct pci_host_bridge ->native_* members caches the ownership status of various PCIe capabilities, use them instead of distributed checks for pcie_ports_native. Signed-off-by: Kuppuswamy Sathyanarayanan --- drivers/acpi/pci_root.c | 35 ++++++++++++++++++++++--------- drivers/pci/hotplug/pciehp_core.c | 2 +- drivers/pci/pci-acpi.c | 3 --- drivers/pci/pcie/aer.c | 2 +- drivers/pci/pcie/portdrv_core.c | 9 +++----- include/linux/acpi.h | 2 ++ 6 files changed, 32 insertions(+), 21 deletions(-) diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index c12b5fb3e8fb..a9e6b782622d 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -41,6 +41,12 @@ static int acpi_pci_root_scan_dependent(struct acpi_device *adev) | OSC_PCI_CLOCK_PM_SUPPORT \ | OSC_PCI_MSI_SUPPORT) +#define OSC_OWNER(ctrl, bit, flag) \ + do { \ + if (!(ctrl & bit)) \ + flag = 0; \ + } while (0) + static const struct acpi_device_id root_device_ids[] = { {"PNP0A03", 0}, {"", 0}, @@ -887,6 +893,7 @@ struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root, struct pci_bus *bus; struct pci_host_bridge *host_bridge; union acpi_object *obj; + u32 ctrl; info->root = root; info->bridge = device; @@ -912,18 +919,26 @@ struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root, goto out_release_info; host_bridge = to_pci_host_bridge(bus->bridge); - if (!(root->osc_control_set & OSC_PCI_EXPRESS_NATIVE_HP_CONTROL)) - host_bridge->native_pcie_hotplug = 0; + + if (pcie_ports_native) { + decode_osc_control(root, "OS forcibly taking over", + OSC_PCI_EXPRESS_CONTROL_MASKS); + } else { + ctrl = root->osc_control_set; + OSC_OWNER(ctrl, OSC_PCI_EXPRESS_NATIVE_HP_CONTROL, + host_bridge->native_pcie_hotplug); + OSC_OWNER(ctrl, OSC_PCI_EXPRESS_AER_CONTROL, + host_bridge->native_aer); + OSC_OWNER(ctrl, OSC_PCI_EXPRESS_PME_CONTROL, + host_bridge->native_pme); + OSC_OWNER(ctrl, OSC_PCI_EXPRESS_LTR_CONTROL, + host_bridge->native_ltr); + OSC_OWNER(ctrl, OSC_PCI_EXPRESS_DPC_CONTROL, + host_bridge->native_dpc); + } + if (!(root->osc_control_set & OSC_PCI_SHPC_NATIVE_HP_CONTROL)) host_bridge->native_shpc_hotplug = 0; - if (!(root->osc_control_set & OSC_PCI_EXPRESS_AER_CONTROL)) - host_bridge->native_aer = 0; - if (!(root->osc_control_set & OSC_PCI_EXPRESS_PME_CONTROL)) - host_bridge->native_pme = 0; - if (!(root->osc_control_set & OSC_PCI_EXPRESS_LTR_CONTROL)) - host_bridge->native_ltr = 0; - if (!(root->osc_control_set & OSC_PCI_EXPRESS_DPC_CONTROL)) - host_bridge->native_dpc = 0; /* * Evaluate the "PCI Boot Configuration" _DSM Function. If it diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c index ad3393930ecb..d1831e6bf60a 100644 --- a/drivers/pci/hotplug/pciehp_core.c +++ b/drivers/pci/hotplug/pciehp_core.c @@ -256,7 +256,7 @@ static bool pme_is_native(struct pcie_device *dev) const struct pci_host_bridge *host; host = pci_find_host_bridge(dev->port->bus); - return pcie_ports_native || host->native_pme; + return host->native_pme; } static void pciehp_disable_interrupt(struct pcie_device *dev) diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index bf03648c2072..a84f75ec6df8 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -800,9 +800,6 @@ bool pciehp_is_native(struct pci_dev *bridge) if (!(slot_cap & PCI_EXP_SLTCAP_HPC)) return false; - if (pcie_ports_native) - return true; - host = pci_find_host_bridge(bridge->bus); return host->native_pcie_hotplug; } diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c index 65dff5f3457a..79bb441139c2 100644 --- a/drivers/pci/pcie/aer.c +++ b/drivers/pci/pcie/aer.c @@ -219,7 +219,7 @@ int pcie_aer_is_native(struct pci_dev *dev) if (!dev->aer_cap) return 0; - return pcie_ports_native || host->native_aer; + return host->native_aer; } int pci_enable_pcie_error_reporting(struct pci_dev *dev) diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c index 50a9522ab07d..ccd5e0ce5605 100644 --- a/drivers/pci/pcie/portdrv_core.c +++ b/drivers/pci/pcie/portdrv_core.c @@ -208,8 +208,7 @@ static int get_port_device_capability(struct pci_dev *dev) struct pci_host_bridge *host = pci_find_host_bridge(dev->bus); int services = 0; - if (dev->is_hotplug_bridge && - (pcie_ports_native || host->native_pcie_hotplug)) { + if (dev->is_hotplug_bridge && host->native_pcie_hotplug) { services |= PCIE_PORT_SERVICE_HP; /* @@ -221,8 +220,7 @@ static int get_port_device_capability(struct pci_dev *dev) } #ifdef CONFIG_PCIEAER - if (dev->aer_cap && pci_aer_available() && - (pcie_ports_native || host->native_aer)) { + if (dev->aer_cap && pci_aer_available() && host->native_aer) { services |= PCIE_PORT_SERVICE_AER; /* @@ -238,8 +236,7 @@ static int get_port_device_capability(struct pci_dev *dev) * Event Collectors can also generate PMEs, but we don't handle * those yet. */ - if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT && - (pcie_ports_native || host->native_pme)) { + if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT && host->native_pme) { services |= PCIE_PORT_SERVICE_PME; /* diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 39263c6b52e1..35689f4e8e1f 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -569,6 +569,8 @@ extern bool osc_pc_lpi_support_confirmed; #define OSC_PCI_EXPRESS_LTR_CONTROL 0x00000020 #define OSC_PCI_EXPRESS_DPC_CONTROL 0x00000080 #define OSC_PCI_CONTROL_MASKS 0x000000bf +/* Masks specific to PCIe Capabilities */ +#define OSC_PCI_EXPRESS_CONTROL_MASKS 0x000000bd #define ACPI_GSB_ACCESS_ATTRIB_QUICK 0x00000002 #define ACPI_GSB_ACCESS_ATTRIB_SEND_RCV 0x00000004