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[134.134.137.73]) by smtp.gmail.com with ESMTPSA id 137sm9368048pfb.183.2020.09.27.18.11.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 27 Sep 2020 18:11:45 -0700 (PDT) From: Kuppuswamy Sathyanarayanan X-Google-Original-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 Subject: [PATCH v9 2/5] ACPI/PCI: Ignore _OSC negotiation result if pcie_ports_native is set. Date: Sun, 27 Sep 2020 18:11:33 -0700 Message-Id: <6b39e90a03b8c2b999a0307ea307cc1d413382c6.1600457297.git.sathyanarayanan.kuppuswamy@linux.intel.com> 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 | 33 +++++++++++++++++++++---------- 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, 30 insertions(+), 21 deletions(-) diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index f90e841c59f5..9749b7abdd7e 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -43,6 +43,10 @@ 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) \ + if (!(ctrl & bit)) \ + flag = 0; + static const struct acpi_device_id root_device_ids[] = { {"PNP0A03", 0}, {"", 0}, @@ -889,6 +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; @@ -914,18 +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 d5869a03f748..2e53d8bf1fe5 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 1e4cdc6c7ae2..a1b2b16f34ce 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