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
  23 #include "aerdrv.h"
  24
  25 #define AER_AGENT_RECEIVER              0
  26 #define AER_AGENT_REQUESTER             1
  27 #define AER_AGENT_COMPLETER             2
  28 #define AER_AGENT_TRANSMITTER           3
  29
  30 #define AER_AGENT_REQUESTER_MASK        (PCI_ERR_UNC_COMP_TIME| \
  31                                         PCI_ERR_UNC_UNSUP)
  32
  33 #define AER_AGENT_COMPLETER_MASK        PCI_ERR_UNC_COMP_ABORT
  34
  35 #define AER_AGENT_TRANSMITTER_MASK(t, e) (e & (PCI_ERR_COR_REP_ROLL| \
  36         ((t == AER_CORRECTABLE) ? PCI_ERR_COR_REP_TIMER: 0)))
  37
  38 #define AER_GET_AGENT(t, e)                                             \
  39         ((e & AER_AGENT_COMPLETER_MASK) ? AER_AGENT_COMPLETER :         \
  40         (e & AER_AGENT_REQUESTER_MASK) ? AER_AGENT_REQUESTER :          \
  41         (AER_AGENT_TRANSMITTER_MASK(t, e)) ? AER_AGENT_TRANSMITTER :    \
  42         AER_AGENT_RECEIVER)
  43
  44 #define AER_PHYSICAL_LAYER_ERROR_MASK   PCI_ERR_COR_RCVR
  45 #define AER_DATA_LINK_LAYER_ERROR_MASK(t, e)    \
  46                 (PCI_ERR_UNC_DLP|               \
  47                 PCI_ERR_COR_BAD_TLP|            \
  48                 PCI_ERR_COR_BAD_DLLP|           \
  49                 PCI_ERR_COR_REP_ROLL|           \
  50                 ((t == AER_CORRECTABLE) ?       \
  51                 PCI_ERR_COR_REP_TIMER: 0))
  52
  53 #define AER_PHYSICAL_LAYER_ERROR        0
  54 #define AER_DATA_LINK_LAYER_ERROR       1
  55 #define AER_TRANSACTION_LAYER_ERROR     2
  56
  57 #define AER_GET_LAYER_ERROR(t, e)                               \
  58         ((e & AER_PHYSICAL_LAYER_ERROR_MASK) ?                  \
  59         AER_PHYSICAL_LAYER_ERROR :                              \
  60         (e & AER_DATA_LINK_LAYER_ERROR_MASK(t, e)) ?            \
  61                 AER_DATA_LINK_LAYER_ERROR :                     \
  62                 AER_TRANSACTION_LAYER_ERROR)
  63
  64 /*
  65  * AER error strings
  66  */
  67 static char* aer_error_severity_string[] = {
  68         "Uncorrected (Non-Fatal)",
  69         "Uncorrected (Fatal)",
  70         "Corrected"
  71 };
  72
  73 static char* aer_error_layer[] = {
  74         "Physical Layer",
  75         "Data Link Layer",
  76         "Transaction Layer"
  77 };
  78 static char* aer_correctable_error_string[] = {
  79         "Receiver Error        ",       /* Bit Position 0       */
  80         NULL,
  81         NULL,
  82         NULL,
  83         NULL,
  84         NULL,
  85         "Bad TLP               ",       /* Bit Position 6       */
  86         "Bad DLLP              ",       /* Bit Position 7       */
  87         "RELAY_NUM Rollover    ",       /* Bit Position 8       */
  88         NULL,
  89         NULL,
  90         NULL,
  91         "Replay Timer Timeout  ",       /* Bit Position 12      */
  92         "Advisory Non-Fatal    ",       /* Bit Position 13      */
  93         NULL,
  94         NULL,
  95         NULL,
  96         NULL,
  97         NULL,
  98         NULL,
  99         NULL,
 100         NULL,
 101         NULL,
 102         NULL,
 103         NULL,
 104         NULL,
 105         NULL,
 106         NULL,
 107         NULL,
 108         NULL,
 109         NULL,
 110         NULL,
 111 };
 112
 113 static char* aer_uncorrectable_error_string[] = {
 114         NULL,
 115         NULL,
 116         NULL,
 117         NULL,
 118         "Data Link Protocol    ",       /* Bit Position 4       */
 119         NULL,
 120         NULL,
 121         NULL,
 122         NULL,
 123         NULL,
 124         NULL,
 125         NULL,
 126         "Poisoned TLP          ",       /* Bit Position 12      */
 127         "Flow Control Protocol ",       /* Bit Position 13      */
 128         "Completion Timeout    ",       /* Bit Position 14      */
 129         "Completer Abort       ",       /* Bit Position 15      */
 130         "Unexpected Completion ",       /* Bit Position 16      */
 131         "Receiver Overflow     ",       /* Bit Position 17      */
 132         "Malformed TLP         ",       /* Bit Position 18      */
 133         "ECRC                  ",       /* Bit Position 19      */
 134         "Unsupported Request   ",       /* Bit Position 20      */
 135         NULL,
 136         NULL,
 137         NULL,
 138         NULL,
 139         NULL,
 140         NULL,
 141         NULL,
 142         NULL,
 143         NULL,
 144         NULL,
 145         NULL,
 146 };
 147
 148 static char* aer_agent_string[] = {
 149         "Receiver ID",
 150         "Requester ID",
 151         "Completer ID",
 152         "Transmitter ID"
 153 };
 154
 155 static char * aer_get_error_source_name(int severity,
 156                         unsigned int status,
 157                         char errmsg_buff[])
 158 {
 159         int i;
 160         char * errmsg = NULL;
 161
 162         for (i = 0; i < 32; i++) {
 163                 if (!(status & (1 << i)))
 164                         continue;
 165
 166                 if (severity == AER_CORRECTABLE)
 167                         errmsg = aer_correctable_error_string[i];
 168                 else
 169                         errmsg = aer_uncorrectable_error_string[i];
 170
 171                 if (!errmsg) {
 172                         sprintf(errmsg_buff, "Unknown Error Bit %2d  ", i);
 173                         errmsg = errmsg_buff;
 174                 }
 175
 176                 break;
 177         }
 178
 179         return errmsg;
 180 }
 181
 182 static DEFINE_SPINLOCK(logbuf_lock);
 183 static char errmsg_buff[100];
 184 void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
 185 {
 186         char * errmsg;
 187         int err_layer, agent;
 188         char * loglevel;
 189
 190         if (info->severity == AER_CORRECTABLE)
 191                 loglevel = KERN_WARNING;
 192         else
 193                 loglevel = KERN_ERR;
 194
 195         printk("%s+------ PCI-Express Device Error ------+\n", loglevel);
 196         printk("%sError Severity\t\t: %s\n", loglevel,
 197                 aer_error_severity_string[info->severity]);
 198
 199         if ( info->status == 0) {
 200                 printk("%sPCIE Bus Error type\t: (Unaccessible)\n", loglevel);
 201                 printk("%sUnaccessible Received\t: %s\n", loglevel,
 202                         info->flags & AER_MULTI_ERROR_VALID_FLAG ?
 203                                 "Multiple" : "First");
 204                 printk("%sUnregistered Agent ID\t: %04x\n", loglevel,
 205                         (dev->bus->number << 8) | dev->devfn);
 206         } else {
 207                 err_layer = AER_GET_LAYER_ERROR(info->severity, info->status);
 208                 printk("%sPCIE Bus Error type\t: %s\n", loglevel,
 209                         aer_error_layer[err_layer]);
 210
 211                 spin_lock(&logbuf_lock);
 212                 errmsg = aer_get_error_source_name(info->severity,
 213                                 info->status,
 214                                 errmsg_buff);
 215                 printk("%s%s\t: %s\n", loglevel, errmsg,
 216                         info->flags & AER_MULTI_ERROR_VALID_FLAG ?
 217                                 "Multiple" : "First");
 218                 spin_unlock(&logbuf_lock);
 219
 220                 agent = AER_GET_AGENT(info->severity, info->status);
 221                 printk("%s%s\t\t: %04x\n", loglevel,
 222                         aer_agent_string[agent],
 223                         (dev->bus->number << 8) | dev->devfn);
 224
 225                 printk("%sVendorID=%04xh, DeviceID=%04xh,"
 226                         " Bus=%02xh, Device=%02xh, Function=%02xh\n",
 227                         loglevel,
 228                         dev->vendor,
 229                         dev->device,
 230                         dev->bus->number,
 231                         PCI_SLOT(dev->devfn),
 232                         PCI_FUNC(dev->devfn));
 233
 234                 if (info->flags & AER_TLP_HEADER_VALID_FLAG) {
 235                         unsigned char *tlp = (unsigned char *) &info->tlp;
 236                         printk("%sTLB Header:\n", loglevel);
 237                         printk("%s%02x%02x%02x%02x %02x%02x%02x%02x"
 238                                 " %02x%02x%02x%02x %02x%02x%02x%02x\n",
 239                                 loglevel,
 240                                 *(tlp + 3), *(tlp + 2), *(tlp + 1), *tlp,
 241                                 *(tlp + 7), *(tlp + 6), *(tlp + 5), *(tlp + 4),
 242                                 *(tlp + 11), *(tlp + 10), *(tlp + 9),
 243                                 *(tlp + 8), *(tlp + 15), *(tlp + 14),
 244                                 *(tlp + 13), *(tlp + 12));
 245                 }
 246         }
 247 }
 248