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Message-ID: <20230704120544.1322315-1-LeoLiu-oc@zhaoxin.com>
Date: Tue, 4 Jul 2023 20:05:44 +0800
From: LeoLiu-oc <LeoLiu-oc@...oxin.com>
To: <lenb@...nel.org>, <james.morse@....com>, <tony.luck@...el.com>,
<bp@...en8.de>, <bhelgaas@...gle.com>, <robert.moore@...el.com>,
<leoliu-oc@...oxin.com>, <linux-acpi@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-pci@...r.kernel.org>,
<acpica-devel@...ts.linuxfoundation.org>
Subject: [PATCH v3 4/5] ACPI/PCI: Add pci_acpi_program_hest_aer_params()
From: leoliu-oc <leoliu-oc@...oxin.com>
The extracted register values from HEST PCI Express AER structures are
written to AER Capabilities.
Signed-off-by: leoliu-oc <leoliu-oc@...oxin.com>
---
drivers/pci/pci-acpi.c | 92 ++++++++++++++++++++++++++++++++++++++++++
drivers/pci/pci.h | 5 +++
2 files changed, 97 insertions(+)
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index a05350a4e49cb..cff54410e2427 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -18,6 +18,7 @@
#include <linux/pm_runtime.h>
#include <linux/pm_qos.h>
#include <linux/rwsem.h>
+#include <acpi/apei.h>
#include "pci.h"
/*
@@ -783,6 +784,97 @@ int pci_acpi_program_hp_params(struct pci_dev *dev)
return -ENODEV;
}
+/*
+ * program_aer_structure_to_aer_registers - Write the AER structure to
+ * the corresponding dev's AER registers.
+ *
+ * @info - the AER structure information
+ *
+ */
+static void program_aer_structure_to_aer_registers(struct acpi_hest_parse_aer_info info)
+{
+ u32 uncorrectable_mask;
+ u32 uncorrectable_severity;
+ u32 correctable_mask;
+ u32 advanced_capabilities;
+ u32 root_error_command;
+ u32 uncorrectable_mask2;
+ u32 uncorrectable_severity2;
+ u32 advanced_capabilities2;
+ int port_type;
+ int pos;
+ struct pci_dev *dev;
+
+ dev = info.pci_dev;
+ port_type = pci_pcie_type(dev);
+
+ pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
+ if (!pos)
+ return;
+
+ if (port_type == PCI_EXP_TYPE_ROOT_PORT) {
+ uncorrectable_mask = info.acpi_hest_aer_root_port->uncorrectable_mask;
+ uncorrectable_severity = info.acpi_hest_aer_root_port->uncorrectable_severity;
+ correctable_mask = info.acpi_hest_aer_root_port->correctable_mask;
+ advanced_capabilities = info.acpi_hest_aer_root_port->advanced_capabilities;
+ root_error_command = info.acpi_hest_aer_root_port->root_error_command;
+
+ pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, uncorrectable_mask);
+ pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, uncorrectable_severity);
+ pci_write_config_dword(dev, pos + PCI_ERR_COR_MASK, correctable_mask);
+ pci_write_config_dword(dev, pos + PCI_ERR_CAP, advanced_capabilities);
+ pci_write_config_dword(dev, pos + PCI_ERR_ROOT_COMMAND, root_error_command);
+ } else if (port_type == PCI_EXP_TYPE_ENDPOINT) {
+ uncorrectable_mask = info.acpi_hest_aer_endpoint->uncorrectable_mask;
+ uncorrectable_severity = info.acpi_hest_aer_endpoint->uncorrectable_severity;
+ correctable_mask = info.acpi_hest_aer_endpoint->correctable_mask;
+ advanced_capabilities = info.acpi_hest_aer_endpoint->advanced_capabilities;
+
+ pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, uncorrectable_mask);
+ pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, uncorrectable_severity);
+ pci_write_config_dword(dev, pos + PCI_ERR_COR_MASK, correctable_mask);
+ pci_write_config_dword(dev, pos + PCI_ERR_CAP, advanced_capabilities);
+ } else if ((pci_pcie_type(dev) == PCI_EXP_TYPE_PCI_BRIDGE) ||
+ (pci_pcie_type(dev) == PCI_EXP_TYPE_PCIE_BRIDGE)) {
+ uncorrectable_mask = info.acpi_hest_aer_for_bridge->uncorrectable_mask;
+ uncorrectable_severity = info.acpi_hest_aer_for_bridge->uncorrectable_severity;
+ correctable_mask = info.acpi_hest_aer_for_bridge->correctable_mask;
+ advanced_capabilities = info.acpi_hest_aer_for_bridge->advanced_capabilities;
+ uncorrectable_mask2 = info.acpi_hest_aer_for_bridge->uncorrectable_mask2;
+ uncorrectable_severity2 = info.acpi_hest_aer_for_bridge->uncorrectable_severity2;
+ advanced_capabilities2 = info.acpi_hest_aer_for_bridge->advanced_capabilities2;
+
+ pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, uncorrectable_mask);
+ pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, uncorrectable_severity);
+ pci_write_config_dword(dev, pos + PCI_ERR_COR_MASK, correctable_mask);
+ pci_write_config_dword(dev, pos + PCI_ERR_CAP, advanced_capabilities);
+ pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_MASK2, uncorrectable_mask2);
+ pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER2, uncorrectable_severity2);
+ pci_write_config_dword(dev, pos + PCI_ERR_CAP2, advanced_capabilities2);
+ }
+}
+
+int pci_acpi_program_hest_aer_params(struct pci_dev *dev)
+{
+ struct acpi_hest_parse_aer_info info = {
+ .pci_dev = dev,
+ .hest_matched_with_dev = 0,
+ .acpi_hest_aer_endpoint = NULL,
+ .acpi_hest_aer_root_port = NULL,
+ .acpi_hest_aer_for_bridge = NULL,
+ };
+
+ if (!pci_is_pcie(dev))
+ return -ENODEV;
+
+ apei_hest_parse(apei_hest_parse_aer, &info);
+ if (info.hest_matched_with_dev == 1)
+ program_aer_structure_to_aer_registers(info);
+ else
+ return -ENODEV;
+ return 0;
+}
+
/**
* pciehp_is_native - Check whether a hotplug port is handled by the OS
* @bridge: Hotplug port to check
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index a4c3974340576..37aa4a33eeed2 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -713,6 +713,7 @@ void acpi_pci_refresh_power_state(struct pci_dev *dev);
int acpi_pci_wakeup(struct pci_dev *dev, bool enable);
bool acpi_pci_need_resume(struct pci_dev *dev);
pci_power_t acpi_pci_choose_state(struct pci_dev *pdev);
+int pci_acpi_program_hest_aer_params(struct pci_dev *dev);
#else
static inline int pci_dev_acpi_reset(struct pci_dev *dev, bool probe)
{
@@ -752,6 +753,10 @@ static inline pci_power_t acpi_pci_choose_state(struct pci_dev *pdev)
{
return PCI_POWER_ERROR;
}
+static inline int pci_acpi_program_hest_aer_params(struct pci_dev *dev)
+{
+ return -ENODEV;
+}
#endif
#ifdef CONFIG_PCIEASPM
--
2.34.1
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