drivers/pci/pcie/aer/aerdrv_errprint.c

   1 /*
   2  * drivers/pci/pcie/aer/aerdrv_errprint.c
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Format error messages and print them to console.
   9  *
  10  * Copyright (C) 2006 Intel Corp.
  11  *      Tom Long Nguyen (tom.l.nguyen@intel.com)
  12  *      Zhang Yanmin (yanmin.zhang@intel.com)
  13  *
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/pci.h>
  18 #include <linux/kernel.h>
  19 #include <linux/errno.h>
  20 #include <linux/pm.h>
  21 #include <linux/suspend.h>
  22 #include <linux/cper.h>
  23
  24 #include "aerdrv.h"
  25 #include <ras/ras_event.h>
  26
  27 #define AER_AGENT_RECEIVER              0
  28 #define AER_AGENT_REQUESTER             1
  29 #define AER_AGENT_COMPLETER             2
  30 #define AER_AGENT_TRANSMITTER           3
  31
  32 #define AER_AGENT_REQUESTER_MASK(t)     ((t == AER_CORRECTABLE) ?       \
  33         0 : (PCI_ERR_UNC_COMP_TIME|PCI_ERR_UNC_UNSUP))
  34 #define AER_AGENT_COMPLETER_MASK(t)     ((t == AER_CORRECTABLE) ?       \
  35         0 : PCI_ERR_UNC_COMP_ABORT)
  36 #define AER_AGENT_TRANSMITTER_MASK(t)   ((t == AER_CORRECTABLE) ?       \
  37         (PCI_ERR_COR_REP_ROLL|PCI_ERR_COR_REP_TIMER) : 0)
  38
  39 #define AER_GET_AGENT(t, e)                                             \
  40         ((e & AER_AGENT_COMPLETER_MASK(t)) ? AER_AGENT_COMPLETER :      \
  41         (e & AER_AGENT_REQUESTER_MASK(t)) ? AER_AGENT_REQUESTER :       \
  42         (e & AER_AGENT_TRANSMITTER_MASK(t)) ? AER_AGENT_TRANSMITTER :   \
  43         AER_AGENT_RECEIVER)
  44
  45 #define AER_PHYSICAL_LAYER_ERROR        0
  46 #define AER_DATA_LINK_LAYER_ERROR       1
  47 #define AER_TRANSACTION_LAYER_ERROR     2
  48
  49 #define AER_PHYSICAL_LAYER_ERROR_MASK(t) ((t == AER_CORRECTABLE) ?      \
  50         PCI_ERR_COR_RCVR : 0)
  51 #define AER_DATA_LINK_LAYER_ERROR_MASK(t) ((t == AER_CORRECTABLE) ?     \
  52         (PCI_ERR_COR_BAD_TLP|                                           \
  53         PCI_ERR_COR_BAD_DLLP|                                           \
  54         PCI_ERR_COR_REP_ROLL|                                           \
  55         PCI_ERR_COR_REP_TIMER) : PCI_ERR_UNC_DLP)
  56
  57 #define AER_GET_LAYER_ERROR(t, e)                                       \
  58         ((e & AER_PHYSICAL_LAYER_ERROR_MASK(t)) ? AER_PHYSICAL_LAYER_ERROR : \
  59         (e & AER_DATA_LINK_LAYER_ERROR_MASK(t)) ? AER_DATA_LINK_LAYER_ERROR : \
  60         AER_TRANSACTION_LAYER_ERROR)
  61
  62 /*
  63  * AER error strings
  64  */
  65 static const char *aer_error_severity_string[] = {
  66         "Uncorrected (Non-Fatal)",
  67         "Uncorrected (Fatal)",
  68         "Corrected"
  69 };
  70
  71 static const char *aer_error_layer[] = {
  72         "Physical Layer",
  73         "Data Link Layer",
  74         "Transaction Layer"
  75 };
  76
  77 static const char *aer_correctable_error_string[] = {
  78         "Receiver Error",               /* Bit Position 0       */
  79         NULL,
  80         NULL,
  81         NULL,
  82         NULL,
  83         NULL,
  84         "Bad TLP",                      /* Bit Position 6       */
  85         "Bad DLLP",                     /* Bit Position 7       */
  86         "RELAY_NUM Rollover",           /* Bit Position 8       */
  87         NULL,
  88         NULL,
  89         NULL,
  90         "Replay Timer Timeout",         /* Bit Position 12      */
  91         "Advisory Non-Fatal",           /* Bit Position 13      */
  92         "Corrected Internal Error",     /* Bit Position 14      */
  93         "Header Log Overflow",          /* Bit Position 15      */
  94 };
  95
  96 static const char *aer_uncorrectable_error_string[] = {
  97         "Undefined",                    /* Bit Position 0       */
  98         NULL,
  99         NULL,
 100         NULL,
 101         "Data Link Protocol",           /* Bit Position 4       */
 102         "Surprise Down Error",          /* Bit Position 5       */
 103         NULL,
 104         NULL,
 105         NULL,
 106         NULL,
 107         NULL,
 108         NULL,
 109         "Poisoned TLP",                 /* Bit Position 12      */
 110         "Flow Control Protocol",        /* Bit Position 13      */
 111         "Completion Timeout",           /* Bit Position 14      */
 112         "Completer Abort",              /* Bit Position 15      */
 113         "Unexpected Completion",        /* Bit Position 16      */
 114         "Receiver Overflow",            /* Bit Position 17      */
 115         "Malformed TLP",                /* Bit Position 18      */
 116         "ECRC",                         /* Bit Position 19      */
 117         "Unsupported Request",          /* Bit Position 20      */
 118         "ACS Violation",                /* Bit Position 21      */
 119         "Uncorrectable Internal Error", /* Bit Position 22      */
 120         "MC Blocked TLP",               /* Bit Position 23      */
 121         "AtomicOp Egress Blocked",      /* Bit Position 24      */
 122         "TLP Prefix Blocked Error",     /* Bit Position 25      */
 123 };
 124
 125 static const char *aer_agent_string[] = {
 126         "Receiver ID",
 127         "Requester ID",
 128         "Completer ID",
 129         "Transmitter ID"
 130 };
 131
 132 static void __print_tlp_header(struct pci_dev *dev,
 133                                struct aer_header_log_regs *t)
 134 {
 135         dev_err(&dev->dev, "  TLP Header: %08x %08x %08x %08x\n",
 136                 t->dw0, t->dw1, t->dw2, t->dw3);
 137 }
 138
 139 static void __aer_print_error(struct pci_dev *dev,
 140                               struct aer_err_info *info)
 141 {
 142         int i, status;
 143         const char *errmsg = NULL;
 144         status = (info->status & ~info->mask);
 145
 146         for (i = 0; i < 32; i++) {
 147                 if (!(status & (1 << i)))
 148                         continue;
 149
 150                 if (info->severity == AER_CORRECTABLE)
 151                         errmsg = i < ARRAY_SIZE(aer_correctable_error_string) ?
 152                                 aer_correctable_error_string[i] : NULL;
 153                 else
 154                         errmsg = i < ARRAY_SIZE(aer_uncorrectable_error_string) ?
 155                                 aer_uncorrectable_error_string[i] : NULL;
 156
 157                 if (errmsg)
 158                         dev_err(&dev->dev, "   [%2d] %-22s%s\n", i, errmsg,
 159                                 info->first_error == i ? " (First)" : "");
 160                 else
 161                         dev_err(&dev->dev, "   [%2d] Unknown Error Bit%s\n",
 162                                 i, info->first_error == i ? " (First)" : "");
 163         }
 164 }
 165
 166 void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
 167 {
 168         int layer, agent;
 169         int id = ((dev->bus->number << 8) | dev->devfn);
 170
 171         if (!info->status) {
 172                 dev_err(&dev->dev, "PCIe Bus Error: severity=%s, type=Unaccessible, id=%04x(Unregistered Agent ID)\n",
 173                         aer_error_severity_string[info->severity], id);
 174                 goto out;
 175         }
 176
 177         layer = AER_GET_LAYER_ERROR(info->severity, info->status);
 178         agent = AER_GET_AGENT(info->severity, info->status);
 179
 180         dev_err(&dev->dev, "PCIe Bus Error: severity=%s, type=%s, id=%04x(%s)\n",
 181                 aer_error_severity_string[info->severity],
 182                 aer_error_layer[layer], id, aer_agent_string[agent]);
 183
 184         dev_err(&dev->dev, "  device [%04x:%04x] error status/mask=%08x/%08x\n",
 185                 dev->vendor, dev->device,
 186                 info->status, info->mask);
 187
 188         __aer_print_error(dev, info);
 189
 190         if (info->tlp_header_valid)
 191                 __print_tlp_header(dev, &info->tlp);
 192
 193 out:
 194         if (info->id && info->error_dev_num > 1 && info->id == id)
 195                 dev_err(&dev->dev, "  Error of this Agent(%04x) is reported first\n", id);
 196
 197         trace_aer_event(dev_name(&dev->dev), (info->status & ~info->mask),
 198                         info->severity);
 199 }
 200
 201 void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info)
 202 {
 203         dev_info(&dev->dev, "AER: %s%s error received: id=%04x\n",
 204                 info->multi_error_valid ? "Multiple " : "",
 205                 aer_error_severity_string[info->severity], info->id);
 206 }
 207
 208 #ifdef CONFIG_ACPI_APEI_PCIEAER
 209 int cper_severity_to_aer(int cper_severity)
 210 {
 211         switch (cper_severity) {
 212         case CPER_SEV_RECOVERABLE:
 213                 return AER_NONFATAL;
 214         case CPER_SEV_FATAL:
 215                 return AER_FATAL;
 216         default:
 217                 return AER_CORRECTABLE;
 218         }
 219 }
 220 EXPORT_SYMBOL_GPL(cper_severity_to_aer);
 221
 222 void cper_print_aer(struct pci_dev *dev, int cper_severity,
 223                     struct aer_capability_regs *aer)
 224 {
 225         int aer_severity, layer, agent, status_strs_size, tlp_header_valid = 0;
 226         u32 status, mask;
 227         const char **status_strs;
 228
 229         aer_severity = cper_severity_to_aer(cper_severity);
 230
 231         if (aer_severity == AER_CORRECTABLE) {
 232                 status = aer->cor_status;
 233                 mask = aer->cor_mask;
 234                 status_strs = aer_correctable_error_string;
 235                 status_strs_size = ARRAY_SIZE(aer_correctable_error_string);
 236         } else {
 237                 status = aer->uncor_status;
 238                 mask = aer->uncor_mask;
 239                 status_strs = aer_uncorrectable_error_string;
 240                 status_strs_size = ARRAY_SIZE(aer_uncorrectable_error_string);
 241                 tlp_header_valid = status & AER_LOG_TLP_MASKS;
 242         }
 243
 244         layer = AER_GET_LAYER_ERROR(aer_severity, status);
 245         agent = AER_GET_AGENT(aer_severity, status);
 246
 247         dev_err(&dev->dev, "aer_status: 0x%08x, aer_mask: 0x%08x\n", status, mask);
 248         cper_print_bits("", status, status_strs, status_strs_size);
 249         dev_err(&dev->dev, "aer_layer=%s, aer_agent=%s\n",
 250                 aer_error_layer[layer], aer_agent_string[agent]);
 251
 252         if (aer_severity != AER_CORRECTABLE)
 253                 dev_err(&dev->dev, "aer_uncor_severity: 0x%08x\n",
 254                         aer->uncor_severity);
 255
 256         if (tlp_header_valid)
 257                 __print_tlp_header(dev, &aer->header_log);
 258
 259         trace_aer_event(dev_name(&dev->dev), (status & ~mask),
 260                         aer_severity);
 261 }
 262 #endif