diff options
Diffstat (limited to 'drivers/pci/pcie/aer/aerdrv_errprint.c')
| -rw-r--r-- | drivers/pci/pcie/aer/aerdrv_errprint.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/drivers/pci/pcie/aer/aerdrv_errprint.c b/drivers/pci/pcie/aer/aerdrv_errprint.c new file mode 100644 index 00000000..3ea51736 --- /dev/null +++ b/drivers/pci/pcie/aer/aerdrv_errprint.c @@ -0,0 +1,263 @@ +/* + * 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 |