Re: [PATCH 4/6] PCI-Express AER implemetation

From: Zhang, Yanmin
Date: Wed Jun 28 2006 - 21:29:49 EST

From: Zhang, Yanmin <yanmin.zhang@xxxxxxxxx>

Patch 4 implements the error output by printk.

Signed-off-by: Zhang Yanmin <yanmin.zhang@xxxxxxxxx>

---

--- linux-2.6.17/drivers/pci/pcie/aer/aerdrv_errprint.c 1970-01-01 08:00:00.000000000 +0800
+++ linux-2.6.17_aer/drivers/pci/pcie/aer/aerdrv_errprint.c 2006-06-22 16:46:29.000000000 +0800
@@ -0,0 +1,216 @@
+/*
+ * Copyright (C) 2006 Intel
+ * Tom Long Nguyen (tom.l.nguyen@xxxxxxxxx)
+ * Zhang Yanmin (yanmin.zhang@xxxxxxxxx)
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/pm.h>
+#include <linux/suspend.h>
+
+#include "aerdrv.h"
+
+#define AER_AGENT_RECEIVER 0
+#define AER_AGENT_REQUESTER 1
+#define AER_AGENT_COMPLETER 2
+#define AER_AGENT_TRANSMITTER 3
+
+#define AER_AGENT_REQUESTER_MASK (PCI_ERR_UNC_COMP_TIME| \
+ PCI_ERR_UNC_UNSUP)
+
+#define AER_AGENT_COMPLETER_MASK PCI_ERR_UNC_COMP_ABORT
+
+#define AER_AGENT_TRANSMITTER_MASK(t, e) (e & (PCI_ERR_COR_REP_ROLL| \
+ ((t == AER_CORRECTABLE) ? PCI_ERR_COR_REP_TIMER: 0)))
+
+#define AER_GET_AGENT(t, e) \
+ ((e & AER_AGENT_COMPLETER_MASK) ? AER_AGENT_COMPLETER : \
+ (e & AER_AGENT_REQUESTER_MASK) ? AER_AGENT_REQUESTER : \
+ (AER_AGENT_TRANSMITTER_MASK(t, e)) ? AER_AGENT_TRANSMITTER : \
+ AER_AGENT_RECEIVER)
+
+#define AER_PHYSICAL_LAYER_ERROR_MASK PCI_ERR_COR_RCVR
+#define AER_DATA_LINK_LAYER_ERROR_MASK(t, e) \
+ (PCI_ERR_UNC_DLP| \
+ PCI_ERR_COR_BAD_TLP| \
+ PCI_ERR_COR_BAD_DLLP| \
+ PCI_ERR_COR_REP_ROLL| \
+ ((t == AER_CORRECTABLE) ? \
+ PCI_ERR_COR_REP_TIMER: 0))
+
+#define AER_PHYSICAL_LAYER_ERROR 0
+#define AER_DATA_LINK_LAYER_ERROR 1
+#define AER_TRANSACTION_LAYER_ERROR 2
+
+#define AER_GET_LAYER_ERROR(t, e) \
+ ((e & AER_PHYSICAL_LAYER_ERROR_MASK) ? \
+ AER_PHYSICAL_LAYER_ERROR : \
+ (e & AER_DATA_LINK_LAYER_ERROR_MASK(t, e)) ? \
+ AER_DATA_LINK_LAYER_ERROR : \
+ AER_TRANSACTION_LAYER_ERROR)
+
+/*
+ * AER error strings
+ */
+static char* aer_error_severity_string[] = {
+ "Uncorrected (Non-Fatal)",
+ "Uncorrected (Fatal)",
+ "Corrected"
+};
+
+static char* aer_error_layer[] = {
+ "Physical Layer",
+ "Data Link Layer",
+ "Transaction Layer"
+};
+static char* aer_correctable_error_string[] = {
+ "Receiver Error ", /* Bit Position 0 */
+ "Unknown Error Bit 1 ", /* Bit Position 1 */
+ "Unknown Error Bit 2 ", /* Bit Position 2 */
+ "Unknown Error Bit 3 ", /* Bit Position 3 */
+ "Unknown Error Bit 4 ", /* Bit Position 4 */
+ "Unknown Error Bit 5 ", /* Bit Position 5 */
+ "Bad TLP ", /* Bit Position 6 */
+ "Bad DLLP ", /* Bit Position 7 */
+ "RELAY_NUM Rollover ", /* Bit Position 8 */
+ "Unknown Error Bit 9 ", /* Bit Position 9 */
+ "Unknown Error Bit 10 ", /* Bit Position 10 */
+ "Unknown Error Bit 11 ", /* Bit Position 11 */
+ "Replay Timer Timeout ", /* Bit Position 12 */
+ "Advisory Non-Fatal ", /* Bit Position 13 */
+ "Unknown Error Bit 14 ", /* Bit Position 14 */
+ "Unknown Error Bit 15 ", /* Bit Position 15 */
+ "Unknown Error Bit 16 ", /* Bit Position 16 */
+ "Unknown Error Bit 17 ", /* Bit Position 17 */
+ "Unknown Error Bit 18 ", /* Bit Position 18 */
+ "Unknown Error Bit 19 ", /* Bit Position 19 */
+ "Unknown Error Bit 20 ", /* Bit Position 20 */
+ "Unknown Error Bit 21 ", /* Bit Position 21 */
+ "Unknown Error Bit 22 ", /* Bit Position 22 */
+ "Unknown Error Bit 23 ", /* Bit Position 23 */
+ "Unknown Error Bit 24 ", /* Bit Position 24 */
+ "Unknown Error Bit 25 ", /* Bit Position 25 */
+ "Unknown Error Bit 26 ", /* Bit Position 26 */
+ "Unknown Error Bit 27 ", /* Bit Position 27 */
+ "Unknown Error Bit 28 ", /* Bit Position 28 */
+ "Unknown Error Bit 29 ", /* Bit Position 29 */
+ "Unknown Error Bit 30 ", /* Bit Position 30 */
+ "Unknown Error Bit 31 " /* Bit Position 31 */
+};
+
+static char* aer_uncorrectable_error_string[] = {
+ "Unknown Error Bit 0 ", /* Bit Position 0 */
+ "Unknown Error Bit 1 ", /* Bit Position 1 */
+ "Unknown Error Bit 2 ", /* Bit Position 2 */
+ "Unknown Error Bit 3 ", /* Bit Position 3 */
+ "Data Link Protocol ", /* Bit Position 4 */
+ "Unknown Error Bit 5 ", /* Bit Position 5 */
+ "Unknown Error Bit 6 ", /* Bit Position 6 */
+ "Unknown Error Bit 7 ", /* Bit Position 7 */
+ "Unknown Error Bit 8 ", /* Bit Position 8 */
+ "Unknown Error Bit 9 ", /* Bit Position 9 */
+ "Unknown Error Bit 10 ", /* Bit Position 10 */
+ "Unknown Error Bit 11 ", /* Bit Position 11 */
+ "Poisoned TLP ", /* Bit Position 12 */
+ "Flow Control Protocol ", /* Bit Position 13 */
+ "Completion Timeout ", /* Bit Position 14 */
+ "Completer Abort ", /* Bit Position 15 */
+ "Unexpected Completion ", /* Bit Position 16 */
+ "Receiver Overflow ", /* Bit Position 17 */
+ "Malformed TLP ", /* Bit Position 18 */
+ "ECRC ", /* Bit Position 19 */
+ "Unsupported Request ", /* Bit Position 20 */
+ "Unknown Error Bit 21 ", /* Bit Position 21 */
+ "Unknown Error Bit 22 ", /* Bit Position 22 */
+ "Unknown Error Bit 23 ", /* Bit Position 23 */
+ "Unknown Error Bit 24 ", /* Bit Position 24 */
+ "Unknown Error Bit 25 ", /* Bit Position 25 */
+ "Unknown Error Bit 26 ", /* Bit Position 26 */
+ "Unknown Error Bit 27 ", /* Bit Position 27 */
+ "Unknown Error Bit 28 ", /* Bit Position 28 */
+ "Unknown Error Bit 29 ", /* Bit Position 29 */
+ "Unknown Error Bit 30 ", /* Bit Position 30 */
+ "Unknown Error Bit 31 " /* Bit Position 31 */
+};
+
+static char* aer_agent_string[] = {
+ "Receiver ID",
+ "Requester ID",
+ "Completer ID",
+ "Transmitter ID"
+};
+
+static char* aer_get_error_source_name(int severity, unsigned int status)
+{
+ int i;
+
+ for (i = 0; i < 32; i++) {
+ if (!(status & (1 << i)))
+ continue;
+
+ if (severity == AER_CORRECTABLE)
+ return aer_correctable_error_string[i];
+ else
+ return aer_uncorrectable_error_string[i];
+ }
+
+ return NULL;
+}
+
+void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
+{
+ char * errmsg;
+ int err_layer, agent;
+
+ printk(KERN_ERR "+------ PCI-Express Device Error ------+\n");
+ printk(KERN_ERR "Error Severity\t\t: %s\n",
+ aer_error_severity_string[info->severity]);
+
+ if ( info->status == 0) {
+ printk(KERN_ERR "PCIE Bus Error type\t: (Unaccessible)\n");
+ printk(KERN_ERR "Unaccessible Received\t: %s\n",
+ info->flags & AER_MULTI_ERROR_VALID_FLAG ?
+ "Multiple" : "First");
+ printk(KERN_ERR "Unregistered Agent ID\t: %04x\n",
+ (dev->bus->number << 8) | dev->devfn);
+ } else {
+ err_layer = AER_GET_LAYER_ERROR(info->severity, info->status);
+ printk(KERN_ERR "PCIE Bus Error type\t: %s\n",
+ aer_error_layer[err_layer]);
+
+ errmsg = aer_get_error_source_name(info->severity, info->status);
+ printk(KERN_ERR "%s\t: %s\n", errmsg,
+ info->flags & AER_MULTI_ERROR_VALID_FLAG ?
+ "Multiple" : "First");
+
+ agent = AER_GET_AGENT(info->severity, info->status);
+ printk(KERN_ERR "%s\t\t: %04x\n",
+ aer_agent_string[agent],
+ (dev->bus->number << 8) | dev->devfn);
+
+ printk(KERN_ERR "VendorID=%04xh, DeviceID=%04xh,"
+ " Bus=%02xh, Device=%02xh, Function=%02xh\n",
+ dev->vendor,
+ dev->device,
+ dev->bus->number,
+ PCI_SLOT(dev->devfn),
+ PCI_FUNC(dev->devfn));
+
+ if (info->flags & AER_TLP_HEADER_VALID_FLAG) {
+ unsigned char *tlp = (unsigned char *) &info->tlp;
+ printk(KERN_ERR "TLB Header:\n");
+ printk(KERN_ERR "%02x%02x%02x%02x %02x%02x%02x%02x"
+ " %02x%02x%02x%02x %02x%02x%02x%02x\n",
+ *(tlp + 3), *(tlp + 2), *(tlp + 1), *tlp,
+ *(tlp + 7), *(tlp + 6), *(tlp + 5), *(tlp + 4),
+ *(tlp + 11), *(tlp + 10), *(tlp + 9),
+ *(tlp + 8), *(tlp + 15), *(tlp + 14),
+ *(tlp + 13), *(tlp + 12));
+ }
+ }
+}
+
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