Presently the vendor drivers are unable to do the recovery for the
vendor specific recoverable HW errors, reported to the APEI driver
in the vendor defined sections, because APEI driver does not support
reporting the same to the vendor drivers.
This patch set
1. add an interface to the APEI driver to enable the vendor
drivers to register the event handling functions for the corresponding
vendor specific HW errors and report the error to the vendor driver.
2. add driver to handle HiSilicon hip08 PCIe controller's errors
which is an example application of the above APEI interface.
Changes:
V3:
1. Fix the comments from Bjorn Helgaas.
V2:
1. Changes in the HiSilicon PCIe controller's error handling driver
for the comments from Bjorn Helgaas.
2. Changes in the APEI interface to support reporting the vendor error
for module with multiple devices, but use the same section type.
In the error handler will use socket id/sub module id etc to distinguish
the device.
V1:
1. Fix comments from James Morse.
2. add driver to handle HiSilicon hip08 PCIe controller's errors,
which is an application of the above interface.
Shiju Jose (1):
ACPI: APEI: Add support to notify the vendor specific HW errors
Yicong Yang (1):
PCI: HIP: Add handling of HiSilicon HIP PCIe controller's errors
drivers/acpi/apei/ghes.c | 116 ++++++++++-
drivers/pci/controller/Kconfig | 8 +
drivers/pci/controller/Makefile | 1 +
drivers/pci/controller/pcie-hisi-error.c | 334 +++++++++++++++++++++++++++++++
include/acpi/ghes.h | 56 ++++++
5 files changed, 510 insertions(+), 5 deletions(-)
create mode 100644 drivers/pci/controller/pcie-hisi-error.c
--
1.9.1
From: Yicong Yang <[email protected]>
The HiSilicon HIP PCIe controller is capable of handling errors
on root port and perform port reset separately at each root port.
This patch add error handling driver for HIP PCIe controller to log
and report recoverable errors. Perform root port reset and restore
link status after the recovery.
Following are some of the PCIe controller's recoverable errors
1. completion transmission timeout error.
2. CRS retry counter over the threshold error.
3. ECC 2 bit errors
4. AXI bresponse/rresponse errors etc.
Signed-off-by: Yicong Yang <[email protected]>
Signed-off-by: Shiju Jose <[email protected]>
--
drivers/pci/controller/Kconfig | 8 +
drivers/pci/controller/Makefile | 1 +
drivers/pci/controller/pcie-hisi-error.c | 336 +++++++++++++++++++++++++++++++
3 files changed, 345 insertions(+)
create mode 100644 drivers/pci/controller/pcie-hisi-error.c
---
drivers/pci/controller/Kconfig | 8 +
drivers/pci/controller/Makefile | 1 +
drivers/pci/controller/pcie-hisi-error.c | 334 +++++++++++++++++++++++++++++++
3 files changed, 343 insertions(+)
create mode 100644 drivers/pci/controller/pcie-hisi-error.c
diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index c77069c..5dad1ca 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -260,6 +260,14 @@ config PCI_HYPERV_INTERFACE
The Hyper-V PCI Interface is a helper driver allows other drivers to
have a common interface with the Hyper-V PCI frontend driver.
+config PCIE_HISI_ERR
+ depends on ARM64 || COMPILE_TEST
+ depends on ACPI
+ bool "HiSilicon HIP PCIe controller error handling driver"
+ help
+ Say Y here if you want error handling support
+ for the PCIe controller's errors on HiSilicon HIP SoCs
+
source "drivers/pci/controller/dwc/Kconfig"
source "drivers/pci/controller/cadence/Kconfig"
endmenu
diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile
index 3d4f597..2d1565f 100644
--- a/drivers/pci/controller/Makefile
+++ b/drivers/pci/controller/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o
obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o
obj-$(CONFIG_PCIE_TANGO_SMP8759) += pcie-tango.o
obj-$(CONFIG_VMD) += vmd.o
+obj-$(CONFIG_PCIE_HISI_ERR) += pcie-hisi-error.o
# pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW
obj-y += dwc/
diff --git a/drivers/pci/controller/pcie-hisi-error.c b/drivers/pci/controller/pcie-hisi-error.c
new file mode 100644
index 0000000..5b33a63
--- /dev/null
+++ b/drivers/pci/controller/pcie-hisi-error.c
@@ -0,0 +1,334 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for handling the PCIe controller's errors on
+ * HiSilicon HIP SoCs.
+ *
+ * Copyright (c) 2018-2019 HiSilicon Limited.
+ */
+
+#include <linux/acpi.h>
+#include <acpi/ghes.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/kfifo.h>
+#include <linux/spinlock.h>
+
+#include "../pci.h"
+
+#define HISI_PCIE_ERR_RECOVER_RING_SIZE 16
+#define HISI_PCIE_ERR_INFO_SIZE 1024
+
+/* HISI PCIe controller's error definitions */
+#define HISI_PCIE_ERR_MISC_REGS 33
+
+#define HISI_PCIE_SUB_MODULE_ID_AP 0
+#define HISI_PCIE_SUB_MODULE_ID_TL 1
+#define HISI_PCIE_SUB_MODULE_ID_MAC 2
+#define HISI_PCIE_SUB_MODULE_ID_DL 3
+#define HISI_PCIE_SUB_MODULE_ID_SDI 4
+
+#define HISI_PCIE_LOCAL_VALID_VERSION BIT(0)
+#define HISI_PCIE_LOCAL_VALID_SOC_ID BIT(1)
+#define HISI_PCIE_LOCAL_VALID_SOCKET_ID BIT(2)
+#define HISI_PCIE_LOCAL_VALID_NIMBUS_ID BIT(3)
+#define HISI_PCIE_LOCAL_VALID_SUB_MODULE_ID BIT(4)
+#define HISI_PCIE_LOCAL_VALID_CORE_ID BIT(5)
+#define HISI_PCIE_LOCAL_VALID_PORT_ID BIT(6)
+#define HISI_PCIE_LOCAL_VALID_ERR_TYPE BIT(7)
+#define HISI_PCIE_LOCAL_VALID_ERR_SEVERITY BIT(8)
+#define HISI_PCIE_LOCAL_VALID_ERR_MISC 9
+
+#define HISI_ERR_SEV_RECOVERABLE 0
+#define HISI_ERR_SEV_FATAL 1
+#define HISI_ERR_SEV_CORRECTED 2
+#define HISI_ERR_SEV_NONE 3
+
+static guid_t hisi_pcie_sec_type = GUID_INIT(0xB2889FC9, 0xE7D7, 0x4F9D,
+ 0xA8, 0x67, 0xAF, 0x42, 0xE9, 0x8B, 0xE7, 0x72);
+
+#define HISI_PCIE_CORE_ID(v) ((v) >> 3)
+#define HISI_PCIE_PORT_ID(core, v) (((v) >> 1) + ((core) << 3))
+#define HISI_PCIE_CORE_PORT_ID(v) (((v) % 8) << 1)
+
+struct hisi_pcie_err_data {
+ u64 val_bits;
+ u8 version;
+ u8 soc_id;
+ u8 socket_id;
+ u8 nimbus_id;
+ u8 sub_module_id;
+ u8 core_id;
+ u8 port_id;
+ u8 err_severity;
+ u16 err_type;
+ u8 reserv[2];
+ u32 err_misc[HISI_PCIE_ERR_MISC_REGS];
+};
+
+struct hisi_pcie_err_info {
+ struct hisi_pcie_err_data err_data;
+ struct platform_device *pdev;
+};
+
+static char *hisi_pcie_sub_module_name(u8 id)
+{
+ switch (id) {
+ case HISI_PCIE_SUB_MODULE_ID_AP: return "AP Layer";
+ case HISI_PCIE_SUB_MODULE_ID_TL: return "TL Layer";
+ case HISI_PCIE_SUB_MODULE_ID_MAC: return "MAC Layer";
+ case HISI_PCIE_SUB_MODULE_ID_DL: return "DL Layer";
+ case HISI_PCIE_SUB_MODULE_ID_SDI: return "SDI Layer";
+ }
+
+ return "unknown";
+}
+
+static char *hisi_pcie_err_severity(u8 err_sev)
+{
+ switch (err_sev) {
+ case HISI_ERR_SEV_RECOVERABLE: return "recoverable";
+ case HISI_ERR_SEV_FATAL: return "fatal";
+ case HISI_ERR_SEV_CORRECTED: return "corrected";
+ case HISI_ERR_SEV_NONE: return "none";
+ }
+
+ return "unknown";
+}
+
+static int hisi_pcie_port_reset(struct platform_device *pdev,
+ u32 chip_id, u32 port_id)
+{
+ struct device *dev = &pdev->dev;
+ acpi_handle handle = ACPI_HANDLE(dev);
+ union acpi_object arg[3];
+ struct acpi_object_list arg_list;
+ acpi_status s;
+ unsigned long long data = 0;
+
+ arg[0].type = ACPI_TYPE_INTEGER;
+ arg[0].integer.value = chip_id;
+ arg[1].type = ACPI_TYPE_INTEGER;
+ arg[1].integer.value = HISI_PCIE_CORE_ID(port_id);
+ arg[2].type = ACPI_TYPE_INTEGER;
+ arg[2].integer.value = HISI_PCIE_CORE_PORT_ID(port_id);
+
+ arg_list.count = 3;
+ arg_list.pointer = arg;
+
+ /* Call the ACPI handle to reset root port */
+ s = acpi_evaluate_integer(handle, "RST", &arg_list, &data);
+ if (ACPI_FAILURE(s)) {
+ dev_err(dev, "No RST method\n");
+ return -EIO;
+ }
+
+ if (data) {
+ dev_err(dev, "Failed to Reset\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int hisi_pcie_port_do_recovery(struct platform_device *dev,
+ u32 chip_id, u32 port_id)
+{
+ acpi_status s;
+ struct device *device = &dev->dev;
+ acpi_handle root_handle = ACPI_HANDLE(device);
+ struct acpi_pci_root *pci_root;
+ struct pci_bus *root_bus;
+ struct pci_dev *pdev;
+ u32 domain, busnr, devfn;
+
+ s = acpi_get_parent(root_handle, &root_handle);
+ if (ACPI_FAILURE(s))
+ return -ENODEV;
+ pci_root = acpi_pci_find_root(root_handle);
+ if (!pci_root)
+ return -ENODEV;
+ root_bus = pci_root->bus;
+ domain = pci_root->segment;
+
+ busnr = root_bus->number;
+ devfn = PCI_DEVFN(port_id, 0);
+ pdev = pci_get_domain_bus_and_slot(domain, busnr, devfn);
+ if (!pdev) {
+ dev_info(device, "Fail to get root port %04x:%02x:%02x.%d device\n",
+ domain, busnr, PCI_SLOT(devfn), PCI_FUNC(devfn));
+ return -ENODEV;
+ }
+
+ pci_stop_and_remove_bus_device_locked(pdev);
+ pci_dev_put(pdev);
+
+ if (hisi_pcie_port_reset(dev, chip_id, port_id))
+ return -EIO;
+
+ /*
+ * The initialization time of subordinate devices after
+ * hot reset is no more than 1s, which is required by
+ * the PCI spec v5.0 sec 6.6.1. The time will shorten
+ * if Readiness Notifications mechanisms are used. But
+ * wait 1s here to adapt any conditions.
+ */
+ ssleep(1UL);
+
+ /* add root port and downstream devices */
+ pci_lock_rescan_remove();
+ pci_rescan_bus(root_bus);
+ pci_unlock_rescan_remove();
+
+ return 0;
+}
+
+static void hisi_pcie_handle_one_error(const struct hisi_pcie_err_data *err,
+ struct platform_device *pdev)
+{
+ char buf[HISI_PCIE_ERR_INFO_SIZE];
+ char *p = buf, *end = buf + sizeof(buf);
+ struct device *dev = &pdev->dev;
+ u32 i;
+ int rc;
+
+ if (err->val_bits == 0) {
+ dev_warn(dev, "%s: no valid error information\n", __func__);
+ return;
+ }
+
+ /* Logging */
+ p += snprintf(p, end - p, "[ Table version=%d ", err->version);
+ if (err->val_bits & HISI_PCIE_LOCAL_VALID_SOC_ID)
+ p += snprintf(p, end - p, "SOC ID=%d ", err->soc_id);
+
+ if (err->val_bits & HISI_PCIE_LOCAL_VALID_SOCKET_ID)
+ p += snprintf(p, end - p, "socket ID=%d ", err->socket_id);
+
+ if (err->val_bits & HISI_PCIE_LOCAL_VALID_NIMBUS_ID)
+ p += snprintf(p, end - p, "nimbus ID=%d ", err->nimbus_id);
+
+ if (err->val_bits & HISI_PCIE_LOCAL_VALID_SUB_MODULE_ID)
+ p += snprintf(p, end - p, "sub module=%s ",
+ hisi_pcie_sub_module_name(err->sub_module_id));
+
+ if (err->val_bits & HISI_PCIE_LOCAL_VALID_CORE_ID)
+ p += snprintf(p, end - p, "core ID=core%d ", err->core_id);
+
+ if (err->val_bits & HISI_PCIE_LOCAL_VALID_PORT_ID)
+ p += snprintf(p, end - p, "port ID=port%d ", err->port_id);
+
+ if (err->val_bits & HISI_PCIE_LOCAL_VALID_ERR_SEVERITY)
+ p += snprintf(p, end - p, "error severity=%s ",
+ hisi_pcie_err_severity(err->err_severity));
+
+ if (err->val_bits & HISI_PCIE_LOCAL_VALID_ERR_TYPE)
+ p += snprintf(p, end - p, "error type=0x%x ", err->err_type);
+
+ p += snprintf(p, end - p, "]\n");
+ dev_info(dev, "\nHISI : HIP : PCIe controller error\n");
+ dev_info(dev, "%s\n", buf);
+
+ dev_info(dev, "Reg Dump:\n");
+ for (i = 0; i < HISI_PCIE_ERR_MISC_REGS; i++) {
+ if (err->val_bits & BIT(HISI_PCIE_LOCAL_VALID_ERR_MISC + i))
+ dev_info(dev,
+ "ERR_MISC_%d=0x%x\n", i, err->err_misc[i]);
+ }
+
+ /* Recovery for the PCIe controller's errors */
+ if (err->err_severity == HISI_ERR_SEV_RECOVERABLE) {
+ /* try reset PCI port for the error recovery */
+ rc = hisi_pcie_port_do_recovery(pdev, err->socket_id,
+ HISI_PCIE_PORT_ID(err->core_id, err->port_id));
+ if (rc) {
+ dev_info(dev, "fail to do hisi pcie port reset\n");
+ return;
+ }
+ }
+}
+
+static DEFINE_KFIFO(hisi_pcie_err_recover_ring, struct hisi_pcie_err_info,
+ HISI_PCIE_ERR_RECOVER_RING_SIZE);
+static DEFINE_SPINLOCK(hisi_pcie_err_recover_ring_lock);
+
+static void hisi_pcie_err_recover_work_func(struct work_struct *work)
+{
+ struct hisi_pcie_err_info pcie_err_entry;
+
+ while (kfifo_get(&hisi_pcie_err_recover_ring, &pcie_err_entry)) {
+ hisi_pcie_handle_one_error(&pcie_err_entry.err_data,
+ pcie_err_entry.pdev);
+ }
+}
+
+static DECLARE_WORK(hisi_pcie_err_recover_work,
+ hisi_pcie_err_recover_work_func);
+
+static int hisi_pcie_error_handle(struct acpi_hest_generic_data *gdata,
+ int sev, void *data)
+{
+ const struct hisi_pcie_err_data *err_data =
+ acpi_hest_get_payload(gdata);
+ struct hisi_pcie_err_info err_info;
+ struct platform_device *pdev = data;
+ struct device *dev = &pdev->dev;
+ u8 socket;
+
+ if (device_property_read_u8(dev, "socket", &socket))
+ return GHES_EVENT_NONE;
+
+ if (err_data->socket_id != socket)
+ return GHES_EVENT_NONE;
+
+ memcpy(&err_info.err_data, err_data, sizeof(*err_data));
+ err_info.pdev = pdev;
+
+ if (kfifo_in_spinlocked(&hisi_pcie_err_recover_ring, &err_info, 1,
+ &hisi_pcie_err_recover_ring_lock))
+ schedule_work(&hisi_pcie_err_recover_work);
+ else
+ dev_warn(dev, "queue full when recovering PCIe controller's error\n");
+
+ return GHES_EVENT_HANDLED;
+}
+
+static int hisi_pcie_err_handler_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ ret = ghes_register_event_handler(hisi_pcie_sec_type,
+ hisi_pcie_error_handle, pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "%s : ghes_register_event_handler fail\n",
+ __func__);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int hisi_pcie_err_handler_remove(struct platform_device *pdev)
+{
+ ghes_unregister_event_handler(hisi_pcie_sec_type, pdev);
+
+ return 0;
+}
+
+static const struct acpi_device_id hisi_pcie_acpi_match[] = {
+ { "HISI0361", 0 },
+ { }
+};
+
+static struct platform_driver hisi_pcie_err_handler_driver = {
+ .driver = {
+ .name = "hisi-pcie-err-handler",
+ .acpi_match_table = hisi_pcie_acpi_match,
+ },
+ .probe = hisi_pcie_err_handler_probe,
+ .remove = hisi_pcie_err_handler_remove,
+};
+module_platform_driver(hisi_pcie_err_handler_driver);
+
+MODULE_DESCRIPTION("HiSilicon HIP PCIe controller's error handling driver");
+MODULE_LICENSE("GPL v2");
--
1.9.1
Hi Shiju,
Thank you for the patch! Perhaps something to improve:
url: https://github.com/0day-ci/linux/commits/Shiju-Jose/ACPI-APEI-Add-support-to-notify-the-vendor-specific-HW-errors/20200204-073736
base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <[email protected]>
Reported-by: Dan Carpenter <[email protected]>
smatch warnings:
drivers/pci/controller/pcie-hisi-error.c:234 hisi_pcie_handle_one_error() warn: should '((((1))) << (9 + i))' be a 64 bit type?
# https://github.com/0day-ci/linux/commit/71688ac6d222c137b66a707f8a6fdf28b48e1942
git remote add linux-review https://github.com/0day-ci/linux
git remote update linux-review
git checkout 71688ac6d222c137b66a707f8a6fdf28b48e1942
vim +234 drivers/pci/controller/pcie-hisi-error.c
71688ac6d222c1 Yicong Yang 2020-02-03 228 p += snprintf(p, end - p, "]\n");
71688ac6d222c1 Yicong Yang 2020-02-03 229 dev_info(dev, "\nHISI : HIP : PCIe controller error\n");
71688ac6d222c1 Yicong Yang 2020-02-03 230 dev_info(dev, "%s\n", buf);
71688ac6d222c1 Yicong Yang 2020-02-03 231
71688ac6d222c1 Yicong Yang 2020-02-03 232 dev_info(dev, "Reg Dump:\n");
71688ac6d222c1 Yicong Yang 2020-02-03 233 for (i = 0; i < HISI_PCIE_ERR_MISC_REGS; i++) {
71688ac6d222c1 Yicong Yang 2020-02-03 @234 if (err->val_bits & BIT(HISI_PCIE_LOCAL_VALID_ERR_MISC + i))
^^^
This should be BIT_ULL() because it goes up to 9 + 32.
71688ac6d222c1 Yicong Yang 2020-02-03 235 dev_info(dev,
71688ac6d222c1 Yicong Yang 2020-02-03 236 "ERR_MISC_%d=0x%x\n", i, err->err_misc[i]);
71688ac6d222c1 Yicong Yang 2020-02-03 237 }
71688ac6d222c1 Yicong Yang 2020-02-03 238
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/[email protected] Intel Corporation