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   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(t)     ((t == AER_CORRECTABLE) ?       \
  31         0 : (PCI_ERR_UNC_COMP_TIME|PCI_ERR_UNC_UNSUP))
  32 #define AER_AGENT_COMPLETER_MASK(t)     ((t == AER_CORRECTABLE) ?       \
  33         0 : PCI_ERR_UNC_COMP_ABORT)
  34 #define AER_AGENT_TRANSMITTER_MASK(t)   ((t == AER_CORRECTABLE) ?       \
  35         (PCI_ERR_COR_REP_ROLL|PCI_ERR_COR_REP_TIMER) : 0)
  36
  37 #define AER_GET_AGENT(t, e)                                             \
  38         ((e & AER_AGENT_COMPLETER_MASK(t)) ? AER_AGENT_COMPLETER :      \
  39         (e & AER_AGENT_REQUESTER_MASK(t)) ? AER_AGENT_REQUESTER :       \
  40         (e & AER_AGENT_TRANSMITTER_MASK(t)) ? AER_AGENT_TRANSMITTER :   \
  41         AER_AGENT_RECEIVER)
  42
  43 #define AER_PHYSICAL_LAYER_ERROR        0
  44 #define AER_DATA_LINK_LAYER_ERROR       1
  45 #define AER_TRANSACTION_LAYER_ERROR     2
  46
  47 #define AER_PHYSICAL_LAYER_ERROR_MASK(t) ((t == AER_CORRECTABLE) ?      \
  48         PCI_ERR_COR_RCVR : 0)
  49 #define AER_DATA_LINK_LAYER_ERROR_MASK(t) ((t == AER_CORRECTABLE) ?     \
  50         (PCI_ERR_COR_BAD_TLP|                                           \
  51         PCI_ERR_COR_BAD_DLLP|                                           \
  52         PCI_ERR_COR_REP_ROLL|                                           \
  53         PCI_ERR_COR_REP_TIMER) : PCI_ERR_UNC_DLP)
  54
  55 #define AER_GET_LAYER_ERROR(t, e)                                       \
  56         ((e & AER_PHYSICAL_LAYER_ERROR_MASK(t)) ? AER_PHYSICAL_LAYER_ERROR : \
  57         (e & AER_DATA_LINK_LAYER_ERROR_MASK(t)) ? AER_DATA_LINK_LAYER_ERROR : \
  58         AER_TRANSACTION_LAYER_ERROR)
  59
  60 #define AER_PR(info, pdev, fmt, args...)                                \
  61         printk("%s%s %s: " fmt, (info->severity == AER_CORRECTABLE) ?   \
  62                 KERN_WARNING : KERN_ERR, dev_driver_string(&pdev->dev), \
  63                 dev_name(&pdev->dev), ## args)
  64
  65 /*
  66  * AER error strings
  67  */
  68 static char *aer_error_severity_string[] = {
  69         "Uncorrected (Non-Fatal)",
  70         "Uncorrected (Fatal)",
  71         "Corrected"
  72 };
  73
  74 static char *aer_error_layer[] = {
  75         "Physical Layer",
  76         "Data Link Layer",
  77         "Transaction Layer"
  78 };
  79 static char *aer_correctable_error_string[] = {
  80         "Receiver Error        ",       /* Bit Position 0       */
  81         NULL,
  82         NULL,
  83         NULL,
  84         NULL,
  85         NULL,
  86         "Bad TLP               ",       /* Bit Position 6       */
  87         "Bad DLLP              ",       /* Bit Position 7       */
  88         "RELAY_NUM Rollover    ",       /* Bit Position 8       */
  89         NULL,
  90         NULL,
  91         NULL,
  92         "Replay Timer Timeout  ",       /* Bit Position 12      */
  93         "Advisory Non-Fatal    ",       /* Bit Position 13      */
  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         NULL,
 112 };
 113
 114 static char *aer_uncorrectable_error_string[] = {
 115         NULL,
 116         NULL,
 117         NULL,
 118         NULL,
 119         "Data Link Protocol    ",       /* Bit Position 4       */
 120         NULL,
 121         NULL,
 122         NULL,
 123         NULL,
 124         NULL,
 125         NULL,
 126         NULL,
 127         "Poisoned TLP          ",       /* Bit Position 12      */
 128         "Flow Control Protocol ",       /* Bit Position 13      */
 129         "Completion Timeout    ",       /* Bit Position 14      */
 130         "Completer Abort       ",       /* Bit Position 15      */
 131         "Unexpected Completion ",       /* Bit Position 16      */
 132         "Receiver Overflow     ",       /* Bit Position 17      */
 133         "Malformed TLP         ",       /* Bit Position 18      */
 134         "ECRC                  ",       /* Bit Position 19      */
 135         "Unsupported Request   ",       /* Bit Position 20      */
 136         NULL,
 137         NULL,
 138         NULL,
 139         NULL,
 140         NULL,
 141         NULL,
 142         NULL,
 143         NULL,
 144         NULL,
 145         NULL,
 146         NULL,
 147 };
 148
 149 static char *aer_agent_string[] = {
 150         "Receiver ID",
 151         "Requester ID",
 152         "Completer ID",
 153         "Transmitter ID"
 154 };
 155
 156 static void __aer_print_error(struct aer_err_info *info, struct pci_dev *dev)
 157 {
 158         int i, status;
 159         char *errmsg = NULL;
 160
 161         status = (info->status & ~info->mask);
 162
 163         for (i = 0; i < 32; i++) {
 164                 if (!(status & (1 << i)))
 165                         continue;
 166
 167                 if (info->severity == AER_CORRECTABLE)
 168                         errmsg = aer_correctable_error_string[i];
 169                 else
 170                         errmsg = aer_uncorrectable_error_string[i];
 171
 172                 if (errmsg)
 173                         AER_PR(info, dev, "   [%2d] %s%s\n", i, errmsg,
 174                                 info->first_error == i ? " (First)" : "");
 175                 else
 176                         AER_PR(info, dev, "   [%2d] Unknown Error Bit%s\n", i,
 177                                 info->first_error == i ? " (First)" : "");
 178         }
 179 }
 180
 181 void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
 182 {
 183         int id = ((dev->bus->number << 8) | dev->devfn);
 184
 185         if (info->status == 0) {
 186                 AER_PR(info, dev,
 187                         "PCIE Bus Error: severity=%s, type=Unaccessible, "
 188                         "id=%04x(Unregistered Agent ID)\n",
 189                         aer_error_severity_string[info->severity], id);
 190         } else {
 191                 int layer, agent;
 192
 193                 layer = AER_GET_LAYER_ERROR(info->severity, info->status);
 194                 agent = AER_GET_AGENT(info->severity, info->status);
 195
 196                 AER_PR(info, dev,
 197                         "PCIE Bus Error: severity=%s, type=%s, id=%04x(%s)\n",
 198                         aer_error_severity_string[info->severity],
 199                         aer_error_layer[layer], id, aer_agent_string[agent]);
 200
 201                 AER_PR(info, dev,
 202                         "  device [%04x:%04x] error status/mask=%08x/%08x\n",
 203                         dev->vendor, dev->device, info->status, info->mask);
 204
 205                 __aer_print_error(info, dev);
 206
 207                 if (info->tlp_header_valid) {
 208                         unsigned char *tlp = (unsigned char *) &info->tlp;
 209                         AER_PR(info, dev, "  TLP Header:"
 210                                 " %02x%02x%02x%02x %02x%02x%02x%02x"
 211                                 " %02x%02x%02x%02x %02x%02x%02x%02x\n",
 212                                 *(tlp + 3), *(tlp + 2), *(tlp + 1), *tlp,
 213                                 *(tlp + 7), *(tlp + 6), *(tlp + 5), *(tlp + 4),
 214                                 *(tlp + 11), *(tlp + 10), *(tlp + 9),
 215                                 *(tlp + 8), *(tlp + 15), *(tlp + 14),
 216                                 *(tlp + 13), *(tlp + 12));
 217                 }
 218         }
 219
 220         if (info->id && info->error_dev_num > 1 && info->id == id)
 221                 AER_PR(info, dev,
 222                         "  Error of this Agent(%04x) is reported first\n", id);
 223 }
 224
 225 void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info)
 226 {
 227         dev_info(&dev->dev, "AER: %s%s error received: id=%04x\n",
 228                 info->multi_error_valid ? "Multiple " : "",
 229                 aer_error_severity_string[info->severity], info->id);
 230 }