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
  26 #define AER_AGENT_RECEIVER              0
  27 #define AER_AGENT_REQUESTER             1
  28 #define AER_AGENT_COMPLETER             2
  29 #define AER_AGENT_TRANSMITTER           3
  30
  31 #define AER_AGENT_REQUESTER_MASK(t)     ((t == AER_CORRECTABLE) ?       \
  32         0 : (PCI_ERR_UNC_COMP_TIME|PCI_ERR_UNC_UNSUP))
  33 #define AER_AGENT_COMPLETER_MASK(t)     ((t == AER_CORRECTABLE) ?       \
  34         0 : PCI_ERR_UNC_COMP_ABORT)
  35 #define AER_AGENT_TRANSMITTER_MASK(t)   ((t == AER_CORRECTABLE) ?       \
  36         (PCI_ERR_COR_REP_ROLL|PCI_ERR_COR_REP_TIMER) : 0)
  37
  38 #define AER_GET_AGENT(t, e)                                             \
  39         ((e & AER_AGENT_COMPLETER_MASK(t)) ? AER_AGENT_COMPLETER :      \
  40         (e & AER_AGENT_REQUESTER_MASK(t)) ? AER_AGENT_REQUESTER :       \
  41         (e & AER_AGENT_TRANSMITTER_MASK(t)) ? AER_AGENT_TRANSMITTER :   \
  42         AER_AGENT_RECEIVER)
  43
  44 #define AER_PHYSICAL_LAYER_ERROR        0
  45 #define AER_DATA_LINK_LAYER_ERROR       1
  46 #define AER_TRANSACTION_LAYER_ERROR     2
  47
  48 #define AER_PHYSICAL_LAYER_ERROR_MASK(t) ((t == AER_CORRECTABLE) ?      \
  49         PCI_ERR_COR_RCVR : 0)
  50 #define AER_DATA_LINK_LAYER_ERROR_MASK(t) ((t == AER_CORRECTABLE) ?     \
  51         (PCI_ERR_COR_BAD_TLP|                                           \
  52         PCI_ERR_COR_BAD_DLLP|                                           \
  53         PCI_ERR_COR_REP_ROLL|                                           \
  54         PCI_ERR_COR_REP_TIMER) : PCI_ERR_UNC_DLP)
  55
  56 #define AER_GET_LAYER_ERROR(t, e)                                       \
  57         ((e & AER_PHYSICAL_LAYER_ERROR_MASK(t)) ? AER_PHYSICAL_LAYER_ERROR : \
  58         (e & AER_DATA_LINK_LAYER_ERROR_MASK(t)) ? AER_DATA_LINK_LAYER_ERROR : \
  59         AER_TRANSACTION_LAYER_ERROR)
  60
  61 /*
  62  * AER error strings
  63  */
  64 static const char *aer_error_severity_string[] = {
  65         "Uncorrected (Non-Fatal)",
  66         "Uncorrected (Fatal)",
  67         "Corrected"
  68 };
  69
  70 static const char *aer_error_layer[] = {
  71         "Physical Layer",
  72         "Data Link Layer",
  73         "Transaction Layer"
  74 };
  75
  76 static const char *aer_correctable_error_string[] = {
  77         "Receiver Error",               /* Bit Position 0       */
  78         NULL,
  79         NULL,
  80         NULL,
  81         NULL,
  82         NULL,
  83         "Bad TLP",                      /* Bit Position 6       */
  84         "Bad DLLP",                     /* Bit Position 7       */
  85         "RELAY_NUM Rollover",           /* Bit Position 8       */
  86         NULL,
  87         NULL,
  88         NULL,
  89         "Replay Timer Timeout",         /* Bit Position 12      */
  90         "Advisory Non-Fatal",           /* Bit Position 13      */
  91 };
  92
  93 static const char *aer_uncorrectable_error_string[] = {
  94         NULL,
  95         NULL,
  96         NULL,
  97         NULL,
  98         "Data Link Protocol",           /* Bit Position 4       */
  99         NULL,
 100         NULL,
 101         NULL,
 102         NULL,
 103         NULL,
 104         NULL,
 105         NULL,
 106         "Poisoned TLP",                 /* Bit Position 12      */
 107         "Flow Control Protocol",        /* Bit Position 13      */
 108         "Completion Timeout",           /* Bit Position 14      */
 109         "Completer Abort",              /* Bit Position 15      */
 110         "Unexpected Completion",        /* Bit Position 16      */
 111         "Receiver Overflow",            /* Bit Position 17      */
 112         "Malformed TLP",                /* Bit Position 18      */
 113         "ECRC",                         /* Bit Position 19      */
 114         "Unsupported Request",          /* Bit Position 20      */
 115 };
 116
 117 static const char *aer_agent_string[] = {
 118         "Receiver ID",
 119         "Requester ID",
 120         "Completer ID",
 121         "Transmitter ID"
 122 };
 123
 124 static void __aer_print_error(const char *prefix,
 125                               struct aer_err_info *info)
 126 {
 127         int i, status;
 128         const char *errmsg = NULL;
 129
 130         status = (info->status & ~info->mask);
 131
 132         for (i = 0; i < 32; i++) {
 133                 if (!(status & (1 << i)))
 134                         continue;
 135
 136                 if (info->severity == AER_CORRECTABLE)
 137                         errmsg = i < ARRAY_SIZE(aer_correctable_error_string) ?
 138                                 aer_correctable_error_string[i] : NULL;
 139                 else
 140                         errmsg = i < ARRAY_SIZE(aer_uncorrectable_error_string) ?
 141                                 aer_uncorrectable_error_string[i] : NULL;
 142
 143                 if (errmsg)
 144                         printk("%s""   [%2d] %-22s%s\n", prefix, i, errmsg,
 145                                 info->first_error == i ? " (First)" : "");
 146                 else
 147                         printk("%s""   [%2d] Unknown Error Bit%s\n", prefix, i,
 148                                 info->first_error == i ? " (First)" : "");
 149         }
 150 }
 151
 152 void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
 153 {
 154         int id = ((dev->bus->number << 8) | dev->devfn);
 155         char prefix[44];
 156
 157         snprintf(prefix, sizeof(prefix), "%s%s %s: ",
 158                  (info->severity == AER_CORRECTABLE) ? KERN_WARNING : KERN_ERR,
 159                  dev_driver_string(&dev->dev), dev_name(&dev->dev));
 160
 161         if (info->status == 0) {
 162                 printk("%s""PCIe Bus Error: severity=%s, type=Unaccessible, "
 163                         "id=%04x(Unregistered Agent ID)\n", prefix,
 164                         aer_error_severity_string[info->severity], id);
 165         } else {
 166                 int layer, agent;
 167
 168                 layer = AER_GET_LAYER_ERROR(info->severity, info->status);
 169                 agent = AER_GET_AGENT(info->severity, info->status);
 170
 171                 printk("%s""PCIe Bus Error: severity=%s, type=%s, id=%04x(%s)\n",
 172                         prefix, aer_error_severity_string[info->severity],
 173                         aer_error_layer[layer], id, aer_agent_string[agent]);
 174
 175                 printk("%s""  device [%04x:%04x] error status/mask=%08x/%08x\n",
 176                         prefix, dev->vendor, dev->device,
 177                         info->status, info->mask);
 178
 179                 __aer_print_error(prefix, info);
 180
 181                 if (info->tlp_header_valid) {
 182                         unsigned char *tlp = (unsigned char *) &info->tlp;
 183                         printk("%s""  TLP Header:"
 184                                 " %02x%02x%02x%02x %02x%02x%02x%02x"
 185                                 " %02x%02x%02x%02x %02x%02x%02x%02x\n",
 186                                 prefix, *(tlp + 3), *(tlp + 2), *(tlp + 1), *tlp,
 187                                 *(tlp + 7), *(tlp + 6), *(tlp + 5), *(tlp + 4),
 188                                 *(tlp + 11), *(tlp + 10), *(tlp + 9),
 189                                 *(tlp + 8), *(tlp + 15), *(tlp + 14),
 190                                 *(tlp + 13), *(tlp + 12));
 191                 }
 192         }
 193
 194         if (info->id && info->error_dev_num > 1 && info->id == id)
 195                 printk("%s""  Error of this Agent(%04x) is reported first\n",
 196                         prefix, id);
 197 }
 198
 199 void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info)
 200 {
 201         dev_info(&dev->dev, "AER: %s%s error received: id=%04x\n",
 202                 info->multi_error_valid ? "Multiple " : "",
 203                 aer_error_severity_string[info->severity], info->id);
 204 }
 205
 206 #ifdef CONFIG_ACPI_APEI_PCIEAER
 207 int cper_severity_to_aer(int cper_severity)
 208 {
 209         switch (cper_severity) {
 210         case CPER_SEV_RECOVERABLE:
 211                 return AER_NONFATAL;
 212         case CPER_SEV_FATAL:
 213                 return AER_FATAL;
 214         default:
 215                 return AER_CORRECTABLE;
 216         }
 217 }
 218 EXPORT_SYMBOL_GPL(cper_severity_to_aer);
 219
 220 void cper_print_aer(const char *prefix, int cper_severity,
 221                     struct aer_capability_regs *aer)
 222 {
 223         int aer_severity, layer, agent, status_strs_size, tlp_header_valid = 0;
 224         u32 status, mask;
 225         const char **status_strs;
 226
 227         aer_severity = cper_severity_to_aer(cper_severity);
 228         if (aer_severity == AER_CORRECTABLE) {
 229                 status = aer->cor_status;
 230                 mask = aer->cor_mask;
 231                 status_strs = aer_correctable_error_string;
 232                 status_strs_size = ARRAY_SIZE(aer_correctable_error_string);
 233         } else {
 234                 status = aer->uncor_status;
 235                 mask = aer->uncor_mask;
 236                 status_strs = aer_uncorrectable_error_string;
 237                 status_strs_size = ARRAY_SIZE(aer_uncorrectable_error_string);
 238                 tlp_header_valid = status & AER_LOG_TLP_MASKS;
 239         }
 240         layer = AER_GET_LAYER_ERROR(aer_severity, status);
 241         agent = AER_GET_AGENT(aer_severity, status);
 242         printk("%s""aer_status: 0x%08x, aer_mask: 0x%08x\n",
 243                prefix, status, mask);
 244         cper_print_bits(prefix, status, status_strs, status_strs_size);
 245         printk("%s""aer_layer=%s, aer_agent=%s\n", prefix,
 246                aer_error_layer[layer], aer_agent_string[agent]);
 247         if (aer_severity != AER_CORRECTABLE)
 248                 printk("%s""aer_uncor_severity: 0x%08x\n",
 249                        prefix, aer->uncor_severity);
 250         if (tlp_header_valid) {
 251                 const unsigned char *tlp;
 252                 tlp = (const unsigned char *)&aer->header_log;
 253                 printk("%s""aer_tlp_header:"
 254                         " %02x%02x%02x%02x %02x%02x%02x%02x"
 255                         " %02x%02x%02x%02x %02x%02x%02x%02x\n",
 256                         prefix, *(tlp + 3), *(tlp + 2), *(tlp + 1), *tlp,
 257                         *(tlp + 7), *(tlp + 6), *(tlp + 5), *(tlp + 4),
 258                         *(tlp + 11), *(tlp + 10), *(tlp + 9),
 259                         *(tlp + 8), *(tlp + 15), *(tlp + 14),
 260                         *(tlp + 13), *(tlp + 12));
 261         }
 262 }
 263 #endif