Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[~shefty/rdma-dev.git] / 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