forked from Minki/linux
a1b7f2f636
Commitfab4c256a5("PCI/AER: Add a TLP header print helper") introduced the helper function __print_tlp_header(), but contrary to the intention, the behaviour did change: Since we're taking the address of the parameter t, the first 4 or 8 bytes printed will be the value of the pointer t itself, and the remaining 12 or 8 bytes will be who-knows-what (something from the stack). We want to show the values of the four members of the struct aer_header_log_regs; that can be done without ugly and error-prone casts. On little-endian this should produce the same output as originally intended, and since no-one has complained about getting garbage output so far, I think big-endian should be ok too. Fixes:fab4c256a5("PCI/AER: Add a TLP header print helper") Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Borislav Petkov <bp@suse.de> CC: stable@vger.kernel.org # v3.14+
263 lines
7.3 KiB
C
263 lines
7.3 KiB
C
/*
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* drivers/pci/pcie/aer/aerdrv_errprint.c
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Format error messages and print them to console.
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*
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* Copyright (C) 2006 Intel Corp.
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* Tom Long Nguyen (tom.l.nguyen@intel.com)
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* Zhang Yanmin (yanmin.zhang@intel.com)
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*
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/pm.h>
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#include <linux/suspend.h>
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#include <linux/cper.h>
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#include "aerdrv.h"
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#include <ras/ras_event.h>
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#define AER_AGENT_RECEIVER 0
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#define AER_AGENT_REQUESTER 1
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#define AER_AGENT_COMPLETER 2
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#define AER_AGENT_TRANSMITTER 3
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#define AER_AGENT_REQUESTER_MASK(t) ((t == AER_CORRECTABLE) ? \
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0 : (PCI_ERR_UNC_COMP_TIME|PCI_ERR_UNC_UNSUP))
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#define AER_AGENT_COMPLETER_MASK(t) ((t == AER_CORRECTABLE) ? \
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0 : PCI_ERR_UNC_COMP_ABORT)
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#define AER_AGENT_TRANSMITTER_MASK(t) ((t == AER_CORRECTABLE) ? \
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(PCI_ERR_COR_REP_ROLL|PCI_ERR_COR_REP_TIMER) : 0)
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#define AER_GET_AGENT(t, e) \
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((e & AER_AGENT_COMPLETER_MASK(t)) ? AER_AGENT_COMPLETER : \
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(e & AER_AGENT_REQUESTER_MASK(t)) ? AER_AGENT_REQUESTER : \
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(e & AER_AGENT_TRANSMITTER_MASK(t)) ? AER_AGENT_TRANSMITTER : \
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AER_AGENT_RECEIVER)
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#define AER_PHYSICAL_LAYER_ERROR 0
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#define AER_DATA_LINK_LAYER_ERROR 1
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#define AER_TRANSACTION_LAYER_ERROR 2
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#define AER_PHYSICAL_LAYER_ERROR_MASK(t) ((t == AER_CORRECTABLE) ? \
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PCI_ERR_COR_RCVR : 0)
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#define AER_DATA_LINK_LAYER_ERROR_MASK(t) ((t == AER_CORRECTABLE) ? \
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(PCI_ERR_COR_BAD_TLP| \
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PCI_ERR_COR_BAD_DLLP| \
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PCI_ERR_COR_REP_ROLL| \
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PCI_ERR_COR_REP_TIMER) : PCI_ERR_UNC_DLP)
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#define AER_GET_LAYER_ERROR(t, e) \
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((e & AER_PHYSICAL_LAYER_ERROR_MASK(t)) ? AER_PHYSICAL_LAYER_ERROR : \
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(e & AER_DATA_LINK_LAYER_ERROR_MASK(t)) ? AER_DATA_LINK_LAYER_ERROR : \
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AER_TRANSACTION_LAYER_ERROR)
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/*
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* AER error strings
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*/
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static const char *aer_error_severity_string[] = {
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"Uncorrected (Non-Fatal)",
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"Uncorrected (Fatal)",
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"Corrected"
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};
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static const char *aer_error_layer[] = {
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"Physical Layer",
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"Data Link Layer",
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"Transaction Layer"
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};
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static const char *aer_correctable_error_string[] = {
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"Receiver Error", /* Bit Position 0 */
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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"Bad TLP", /* Bit Position 6 */
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"Bad DLLP", /* Bit Position 7 */
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"RELAY_NUM Rollover", /* Bit Position 8 */
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NULL,
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NULL,
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NULL,
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"Replay Timer Timeout", /* Bit Position 12 */
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"Advisory Non-Fatal", /* Bit Position 13 */
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"Corrected Internal Error", /* Bit Position 14 */
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"Header Log Overflow", /* Bit Position 15 */
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};
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static const char *aer_uncorrectable_error_string[] = {
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"Undefined", /* Bit Position 0 */
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NULL,
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NULL,
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NULL,
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"Data Link Protocol", /* Bit Position 4 */
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"Surprise Down Error", /* Bit Position 5 */
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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"Poisoned TLP", /* Bit Position 12 */
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"Flow Control Protocol", /* Bit Position 13 */
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"Completion Timeout", /* Bit Position 14 */
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"Completer Abort", /* Bit Position 15 */
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"Unexpected Completion", /* Bit Position 16 */
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"Receiver Overflow", /* Bit Position 17 */
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"Malformed TLP", /* Bit Position 18 */
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"ECRC", /* Bit Position 19 */
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"Unsupported Request", /* Bit Position 20 */
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"ACS Violation", /* Bit Position 21 */
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"Uncorrectable Internal Error", /* Bit Position 22 */
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"MC Blocked TLP", /* Bit Position 23 */
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"AtomicOp Egress Blocked", /* Bit Position 24 */
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"TLP Prefix Blocked Error", /* Bit Position 25 */
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};
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static const char *aer_agent_string[] = {
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"Receiver ID",
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"Requester ID",
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"Completer ID",
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"Transmitter ID"
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};
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static void __print_tlp_header(struct pci_dev *dev,
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struct aer_header_log_regs *t)
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{
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dev_err(&dev->dev, " TLP Header: %08x %08x %08x %08x\n",
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t->dw0, t->dw1, t->dw2, t->dw3);
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}
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static void __aer_print_error(struct pci_dev *dev,
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struct aer_err_info *info)
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{
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int i, status;
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const char *errmsg = NULL;
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status = (info->status & ~info->mask);
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for (i = 0; i < 32; i++) {
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if (!(status & (1 << i)))
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continue;
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if (info->severity == AER_CORRECTABLE)
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errmsg = i < ARRAY_SIZE(aer_correctable_error_string) ?
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aer_correctable_error_string[i] : NULL;
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else
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errmsg = i < ARRAY_SIZE(aer_uncorrectable_error_string) ?
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aer_uncorrectable_error_string[i] : NULL;
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if (errmsg)
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dev_err(&dev->dev, " [%2d] %-22s%s\n", i, errmsg,
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info->first_error == i ? " (First)" : "");
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else
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dev_err(&dev->dev, " [%2d] Unknown Error Bit%s\n",
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i, info->first_error == i ? " (First)" : "");
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}
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}
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void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
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{
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int layer, agent;
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int id = ((dev->bus->number << 8) | dev->devfn);
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if (!info->status) {
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dev_err(&dev->dev, "PCIe Bus Error: severity=%s, type=Unaccessible, id=%04x(Unregistered Agent ID)\n",
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aer_error_severity_string[info->severity], id);
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goto out;
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}
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layer = AER_GET_LAYER_ERROR(info->severity, info->status);
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agent = AER_GET_AGENT(info->severity, info->status);
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dev_err(&dev->dev, "PCIe Bus Error: severity=%s, type=%s, id=%04x(%s)\n",
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aer_error_severity_string[info->severity],
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aer_error_layer[layer], id, aer_agent_string[agent]);
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dev_err(&dev->dev, " device [%04x:%04x] error status/mask=%08x/%08x\n",
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dev->vendor, dev->device,
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info->status, info->mask);
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__aer_print_error(dev, info);
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if (info->tlp_header_valid)
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__print_tlp_header(dev, &info->tlp);
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out:
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if (info->id && info->error_dev_num > 1 && info->id == id)
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dev_err(&dev->dev, " Error of this Agent(%04x) is reported first\n", id);
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trace_aer_event(dev_name(&dev->dev), (info->status & ~info->mask),
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info->severity);
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}
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void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info)
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{
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dev_info(&dev->dev, "AER: %s%s error received: id=%04x\n",
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info->multi_error_valid ? "Multiple " : "",
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aer_error_severity_string[info->severity], info->id);
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}
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#ifdef CONFIG_ACPI_APEI_PCIEAER
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int cper_severity_to_aer(int cper_severity)
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{
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switch (cper_severity) {
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case CPER_SEV_RECOVERABLE:
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return AER_NONFATAL;
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case CPER_SEV_FATAL:
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return AER_FATAL;
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default:
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return AER_CORRECTABLE;
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}
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}
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EXPORT_SYMBOL_GPL(cper_severity_to_aer);
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void cper_print_aer(struct pci_dev *dev, int cper_severity,
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struct aer_capability_regs *aer)
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{
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int aer_severity, layer, agent, status_strs_size, tlp_header_valid = 0;
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u32 status, mask;
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const char **status_strs;
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aer_severity = cper_severity_to_aer(cper_severity);
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if (aer_severity == AER_CORRECTABLE) {
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status = aer->cor_status;
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mask = aer->cor_mask;
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status_strs = aer_correctable_error_string;
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status_strs_size = ARRAY_SIZE(aer_correctable_error_string);
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} else {
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status = aer->uncor_status;
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mask = aer->uncor_mask;
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status_strs = aer_uncorrectable_error_string;
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status_strs_size = ARRAY_SIZE(aer_uncorrectable_error_string);
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tlp_header_valid = status & AER_LOG_TLP_MASKS;
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}
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layer = AER_GET_LAYER_ERROR(aer_severity, status);
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agent = AER_GET_AGENT(aer_severity, status);
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dev_err(&dev->dev, "aer_status: 0x%08x, aer_mask: 0x%08x\n", status, mask);
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cper_print_bits("", status, status_strs, status_strs_size);
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dev_err(&dev->dev, "aer_layer=%s, aer_agent=%s\n",
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aer_error_layer[layer], aer_agent_string[agent]);
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if (aer_severity != AER_CORRECTABLE)
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dev_err(&dev->dev, "aer_uncor_severity: 0x%08x\n",
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aer->uncor_severity);
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if (tlp_header_valid)
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__print_tlp_header(dev, &aer->header_log);
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trace_aer_event(dev_name(&dev->dev), (status & ~mask),
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aer_severity);
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}
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#endif
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