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
aer_get_error_source_name(int severity,unsigned int status,char errmsg_buff[])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];
aer_print_error(struct pci_dev * dev,struct aer_err_info * info)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("%sTLP 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
249