kevin/linux
1
Fork 0
Code
3b08db37cb
linux/drivers/pci/pcie/aer/aerdrv_errprint.c
Huang Ying 0918472cee PCI: PCIe AER: add aer_recover_queue 
In addition to native PCIe AER, now APEI (ACPI Platform Error
Interface) GHES (Generic Hardware Error Source) can be used to report
PCIe AER errors too.  To add support to APEI GHES PCIe AER recovery,
aer_recover_queue is added to export the recovery function in native
PCIe AER driver.

Recoverable PCIe AER errors are reported via NMI in APEI GHES.  Then
APEI GHES uses irq_work to delay the error processing into an IRQ
handler.  But PCIe AER recovery can be very time-consuming, so
aer_recover_queue, which can be used in IRQ handler, delays the real
recovery action into the process context, that is, work queue.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-07-22 08:25:37 -07:00

264 lines
7.5 KiB
C
Raw Blame History

/*
* drivers/pci/pcie/aer/aerdrv_errprint.c
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Format error messages and print them to console.
*
* Copyright (C) 2006 Intel Corp.
* Tom Long Nguyen (tom.l.nguyen@intel.com)
* Zhang Yanmin (yanmin.zhang@intel.com)
*
*/
#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 <linux/cper.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(t) ((t == AER_CORRECTABLE) ? \
0 : (PCI_ERR_UNC_COMP_TIME|PCI_ERR_UNC_UNSUP))
#define AER_AGENT_COMPLETER_MASK(t) ((t == AER_CORRECTABLE) ? \
0 : PCI_ERR_UNC_COMP_ABORT)
#define AER_AGENT_TRANSMITTER_MASK(t) ((t == AER_CORRECTABLE) ? \
(PCI_ERR_COR_REP_ROLL|PCI_ERR_COR_REP_TIMER) : 0)
#define AER_GET_AGENT(t, e) \
((e & AER_AGENT_COMPLETER_MASK(t)) ? AER_AGENT_COMPLETER : \
(e & AER_AGENT_REQUESTER_MASK(t)) ? AER_AGENT_REQUESTER : \
(e & AER_AGENT_TRANSMITTER_MASK(t)) ? AER_AGENT_TRANSMITTER : \
AER_AGENT_RECEIVER)
#define AER_PHYSICAL_LAYER_ERROR 0
#define AER_DATA_LINK_LAYER_ERROR 1
#define AER_TRANSACTION_LAYER_ERROR 2
#define AER_PHYSICAL_LAYER_ERROR_MASK(t) ((t == AER_CORRECTABLE) ? \
PCI_ERR_COR_RCVR : 0)
#define AER_DATA_LINK_LAYER_ERROR_MASK(t) ((t == AER_CORRECTABLE) ? \
(PCI_ERR_COR_BAD_TLP| \
PCI_ERR_COR_BAD_DLLP| \
PCI_ERR_COR_REP_ROLL| \
PCI_ERR_COR_REP_TIMER) : PCI_ERR_UNC_DLP)
#define AER_GET_LAYER_ERROR(t, e) \
((e & AER_PHYSICAL_LAYER_ERROR_MASK(t)) ? AER_PHYSICAL_LAYER_ERROR : \
(e & AER_DATA_LINK_LAYER_ERROR_MASK(t)) ? AER_DATA_LINK_LAYER_ERROR : \
AER_TRANSACTION_LAYER_ERROR)
/*
* AER error strings
*/
static const char *aer_error_severity_string[] = {
"Uncorrected (Non-Fatal)",
"Uncorrected (Fatal)",
"Corrected"
};
static const char *aer_error_layer[] = {
"Physical Layer",
"Data Link Layer",
"Transaction Layer"
};
static const char *aer_correctable_error_string[] = {
"Receiver Error", /* Bit Position 0 */
NULL,
NULL,
NULL,
NULL,
NULL,
"Bad TLP", /* Bit Position 6 */
"Bad DLLP", /* Bit Position 7 */
"RELAY_NUM Rollover", /* Bit Position 8 */
NULL,
NULL,
NULL,
"Replay Timer Timeout", /* Bit Position 12 */
"Advisory Non-Fatal", /* Bit Position 13 */
};
static const char *aer_uncorrectable_error_string[] = {
NULL,
NULL,
NULL,
NULL,
"Data Link Protocol", /* Bit Position 4 */
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
"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 */
};
static const char *aer_agent_string[] = {
"Receiver ID",
"Requester ID",
"Completer ID",
"Transmitter ID"
};
static void __aer_print_error(const char *prefix,
struct aer_err_info *info)
{
int i, status;
const char *errmsg = NULL;
status = (info->status & ~info->mask);
for (i = 0; i < 32; i++) {
if (!(status & (1 << i)))
continue;
if (info->severity == AER_CORRECTABLE)
errmsg = i < ARRAY_SIZE(aer_correctable_error_string) ?
aer_correctable_error_string[i] : NULL;
else
errmsg = i < ARRAY_SIZE(aer_uncorrectable_error_string) ?
aer_uncorrectable_error_string[i] : NULL;
if (errmsg)
printk("%s"" [%2d] %-22s%s\n", prefix, i, errmsg,
info->first_error == i ? " (First)" : "");
else
printk("%s"" [%2d] Unknown Error Bit%s\n", prefix, i,
info->first_error == i ? " (First)" : "");
}
}
void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
{
int id = ((dev->bus->number << 8) | dev->devfn);
char prefix[44];
snprintf(prefix, sizeof(prefix), "%s%s %s: ",
(info->severity == AER_CORRECTABLE) ? KERN_WARNING : KERN_ERR,
dev_driver_string(&dev->dev), dev_name(&dev->dev));
if (info->status == 0) {
printk("%s""PCIe Bus Error: severity=%s, type=Unaccessible, "
"id=%04x(Unregistered Agent ID)\n", prefix,
aer_error_severity_string[info->severity], id);
} else {
int layer, agent;
layer = AER_GET_LAYER_ERROR(info->severity, info->status);
agent = AER_GET_AGENT(info->severity, info->status);
printk("%s""PCIe Bus Error: severity=%s, type=%s, id=%04x(%s)\n",
prefix, aer_error_severity_string[info->severity],
aer_error_layer[layer], id, aer_agent_string[agent]);
printk("%s"" device [%04x:%04x] error status/mask=%08x/%08x\n",
prefix, dev->vendor, dev->device,
info->status, info->mask);
__aer_print_error(prefix, info);
if (info->tlp_header_valid) {
unsigned char *tlp = (unsigned char *) &info->tlp;
printk("%s"" TLP Header:"
" %02x%02x%02x%02x %02x%02x%02x%02x"
" %02x%02x%02x%02x %02x%02x%02x%02x\n",
prefix, *(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));
}
}
if (info->id && info->error_dev_num > 1 && info->id == id)
printk("%s"" Error of this Agent(%04x) is reported first\n",
prefix, id);
}
void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info)
{
dev_info(&dev->dev, "AER: %s%s error received: id=%04x\n",
info->multi_error_valid ? "Multiple " : "",
aer_error_severity_string[info->severity], info->id);
}
#ifdef CONFIG_ACPI_APEI_PCIEAER
int cper_severity_to_aer(int cper_severity)
{
switch (cper_severity) {
case CPER_SEV_RECOVERABLE:
return AER_NONFATAL;
case CPER_SEV_FATAL:
return AER_FATAL;
default:
return AER_CORRECTABLE;
}
}
EXPORT_SYMBOL_GPL(cper_severity_to_aer);
void cper_print_aer(const char *prefix, int cper_severity,
struct aer_capability_regs *aer)
{
int aer_severity, layer, agent, status_strs_size, tlp_header_valid = 0;
u32 status, mask;
const char **status_strs;
aer_severity = cper_severity_to_aer(cper_severity);
if (aer_severity == AER_CORRECTABLE) {
status = aer->cor_status;
mask = aer->cor_mask;
status_strs = aer_correctable_error_string;
status_strs_size = ARRAY_SIZE(aer_correctable_error_string);
} else {
status = aer->uncor_status;
mask = aer->uncor_mask;
status_strs = aer_uncorrectable_error_string;
status_strs_size = ARRAY_SIZE(aer_uncorrectable_error_string);
tlp_header_valid = status & AER_LOG_TLP_MASKS;
}
layer = AER_GET_LAYER_ERROR(aer_severity, status);
agent = AER_GET_AGENT(aer_severity, status);
printk("%s""aer_status: 0x%08x, aer_mask: 0x%08x\n",
prefix, status, mask);
cper_print_bits(prefix, status, status_strs, status_strs_size);
printk("%s""aer_layer=%s, aer_agent=%s\n", prefix,
aer_error_layer[layer], aer_agent_string[agent]);
if (aer_severity != AER_CORRECTABLE)
printk("%s""aer_uncor_severity: 0x%08x\n",
prefix, aer->uncor_severity);
if (tlp_header_valid) {
const unsigned char *tlp;
tlp = (const unsigned char *)&aer->header_log;
printk("%s""aer_tlp_header:"
" %02x%02x%02x%02x %02x%02x%02x%02x"
" %02x%02x%02x%02x %02x%02x%02x%02x\n",
prefix, *(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));
}
}
#endif
View Git Blame Copy Permalink