linux-kernel - [PATCH v3 2/3] PCI/AER: Print UNCOR

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Date: Wed, 17 Apr 2024 14:14:06 +0800
From: Zhenzhong Duan <zhenzhong.duan@...el.com>
To: linux-pci@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org,
	linux-acpi@...r.kernel.org
Cc: rafael@...nel.org,
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	yudong.wang@...el.com,
	chao.p.peng@...el.com,
	qingshun.wang@...ux.intel.com,
	Zhenzhong Duan <zhenzhong.duan@...el.com>
Subject: [PATCH v3 2/3] PCI/AER: Print UNCOR_STATUS bits that might be ANFE

When an Advisory Non-Fatal error(ANFE) triggers, both correctable error(CE)
status and ANFE related uncorrectable error(UE) status will be printed:

  AER: Correctable error message received from 0000:b7:02.0
  PCIe Bus Error: severity=Correctable, type=Transaction Layer, (Receiver ID)
    device [8086:0db0] error status/mask=00002000/00000000
     [13] NonFatalErr
    Uncorrectable errors that may cause Advisory Non-Fatal:
     [18] TLP

Tested-by: Yudong Wang <yudong.wang@...el.com>
Co-developed-by: "Wang, Qingshun" <qingshun.wang@...ux.intel.com>
Signed-off-by: "Wang, Qingshun" <qingshun.wang@...ux.intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@...el.com>
---
 drivers/pci/pcie/aer.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index 27364ab4b148..870e1d1a5159 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -681,6 +681,7 @@ static void __aer_print_error(struct pci_dev *dev,
 {
 	const char **strings;
 	unsigned long status = info->status & ~info->mask;
+	unsigned long anfe_status = info->anfe_status;
 	const char *level, *errmsg;
 	int i;
 
@@ -701,6 +702,20 @@ static void __aer_print_error(struct pci_dev *dev,
 				info->first_error == i ? " (First)" : "");
 	}
 	pci_dev_aer_stats_incr(dev, info);
+
+	if (!anfe_status)
+		return;
+
+	strings = aer_uncorrectable_error_string;
+	pci_printk(level, dev, "Uncorrectable errors that may cause Advisory Non-Fatal:\n");
+
+	for_each_set_bit(i, &anfe_status, 32) {
+		errmsg = strings[i];
+		if (!errmsg)
+			errmsg = "Unknown Error Bit";
+
+		pci_printk(level, dev, "   [%2d] %s\n", i, errmsg);
+	}
 }
 
 void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
-- 
2.34.1