1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * linux/arch/alpha/kernel/err_common.c
4 *
5 * Copyright (C) 2000 Jeff Wiedemeier (Compaq Computer Corporation)
6 *
7 * Error handling code supporting Alpha systems
8 */
9
10 #include <linux/init.h>
11 #include <linux/sched.h>
12
13 #include <asm/io.h>
14 #include <asm/hwrpb.h>
15 #include <asm/smp.h>
16 #include <asm/err_common.h>
17
18 #include "err_impl.h"
19 #include "proto.h"
20
21 /*
22 * err_print_prefix -- error handling print routines should prefix
23 * all prints with this
24 */
25 char *err_print_prefix = KERN_NOTICE;
26
27
28 /*
29 * Generic
30 */
31 void
32 mchk_dump_mem(void *data, size_t length, char **annotation)
33 {
34 unsigned long *ldata = data;
35 size_t i;
36
37 for (i = 0; (i * sizeof(*ldata)) < length; i++) {
38 if (annotation && !annotation[i])
39 annotation = NULL;
40 printk("%s %08x: %016lx %s\n",
41 err_print_prefix,
42 (unsigned)(i * sizeof(*ldata)), ldata[i],
43 annotation ? annotation[i] : "");
44 }
45 }
46
47 void
48 mchk_dump_logout_frame(struct el_common *mchk_header)
49 {
50 printk("%s -- Frame Header --\n"
51 " Frame Size: %d (0x%x) bytes\n"
52 " Flags: %s%s\n"
53 " MCHK Code: 0x%x\n"
54 " Frame Rev: %d\n"
55 " Proc Offset: 0x%08x\n"
56 " Sys Offset: 0x%08x\n"
57 " -- Processor Region --\n",
58 err_print_prefix,
59 mchk_header->size, mchk_header->size,
60 mchk_header->retry ? "RETRY " : "",
61 mchk_header->err2 ? "SECOND_ERR " : "",
62 mchk_header->code,
63 mchk_header->frame_rev,
64 mchk_header->proc_offset,
65 mchk_header->sys_offset);
66
67 mchk_dump_mem((void *)
68 ((unsigned long)mchk_header + mchk_header->proc_offset),
69 mchk_header->sys_offset - mchk_header->proc_offset,
70 NULL);
71
72 printk("%s -- System Region --\n", err_print_prefix);
73 mchk_dump_mem((void *)
74 ((unsigned long)mchk_header + mchk_header->sys_offset),
75 mchk_header->size - mchk_header->sys_offset,
76 NULL);
77 printk("%s -- End of Frame --\n", err_print_prefix);
78 }
79
80
81 /*
82 * Console Data Log
83 */
84 /* Data */
85 static struct el_subpacket_handler *subpacket_handler_list = NULL;
86 static struct el_subpacket_annotation *subpacket_annotation_list = NULL;
87
88 static struct el_subpacket *
89 el_process_header_subpacket(struct el_subpacket *header)
90 {
91 union el_timestamp timestamp;
92 char *name = "UNKNOWN EVENT";
93 int packet_count = 0;
94 int length = 0;
95
96 if (header->class != EL_CLASS__HEADER) {
97 printk("%s** Unexpected header CLASS %d TYPE %d, aborting\n",
98 err_print_prefix,
99 header->class, header->type);
100 return NULL;
101 }
102
103 switch(header->type) {
104 case EL_TYPE__HEADER__SYSTEM_ERROR_FRAME:
105 name = "SYSTEM ERROR";
106 length = header->by_type.sys_err.frame_length;
107 packet_count =
108 header->by_type.sys_err.frame_packet_count;
109 timestamp.as_int = 0;
110 break;
111 case EL_TYPE__HEADER__SYSTEM_EVENT_FRAME:
112 name = "SYSTEM EVENT";
113 length = header->by_type.sys_event.frame_length;
114 packet_count =
115 header->by_type.sys_event.frame_packet_count;
116 timestamp = header->by_type.sys_event.timestamp;
117 break;
118 case EL_TYPE__HEADER__HALT_FRAME:
119 name = "ERROR HALT";
120 length = header->by_type.err_halt.frame_length;
121 packet_count =
122 header->by_type.err_halt.frame_packet_count;
123 timestamp = header->by_type.err_halt.timestamp;
124 break;
125 case EL_TYPE__HEADER__LOGOUT_FRAME:
126 name = "LOGOUT FRAME";
127 length = header->by_type.logout_header.frame_length;
128 packet_count = 1;
129 timestamp.as_int = 0;
130 break;
131 default: /* Unknown */
132 printk("%s** Unknown header - CLASS %d TYPE %d, aborting\n",
133 err_print_prefix,
134 header->class, header->type);
135 return NULL;
136 }
137
138 printk("%s*** %s:\n"
139 " CLASS %d, TYPE %d\n",
140 err_print_prefix,
141 name,
142 header->class, header->type);
143 el_print_timestamp(×tamp);
144
145 /*
146 * Process the subpackets
147 */
148 el_process_subpackets(header, packet_count);
149
150 /* return the next header */
151 header = (struct el_subpacket *)
152 ((unsigned long)header + header->length + length);
153 return header;
154 }
155
156 static struct el_subpacket *
157 el_process_subpacket_reg(struct el_subpacket *header)
158 {
159 struct el_subpacket *next = NULL;
160 struct el_subpacket_handler *h = subpacket_handler_list;
161
162 for (; h && h->class != header->class; h = h->next);
163 if (h) next = h->handler(header);
164
165 return next;
166 }
167
168 void
169 el_print_timestamp(union el_timestamp *timestamp)
170 {
171 if (timestamp->as_int)
172 printk("%s TIMESTAMP: %d/%d/%02d %d:%02d:%0d\n",
173 err_print_prefix,
174 timestamp->b.month, timestamp->b.day,
175 timestamp->b.year, timestamp->b.hour,
176 timestamp->b.minute, timestamp->b.second);
177 }
178
179 void
180 el_process_subpackets(struct el_subpacket *header, int packet_count)
181 {
182 struct el_subpacket *subpacket;
183 int i;
184
185 subpacket = (struct el_subpacket *)
186 ((unsigned long)header + header->length);
187
188 for (i = 0; subpacket && i < packet_count; i++) {
189 printk("%sPROCESSING SUBPACKET %d\n", err_print_prefix, i);
190 subpacket = el_process_subpacket(subpacket);
191 }
192 }
193
194 struct el_subpacket *
195 el_process_subpacket(struct el_subpacket *header)
196 {
197 struct el_subpacket *next = NULL;
198
199 switch(header->class) {
200 case EL_CLASS__TERMINATION:
201 /* Termination packet, there are no more */
202 break;
203 case EL_CLASS__HEADER:
204 next = el_process_header_subpacket(header);
205 break;
206 default:
207 if (NULL == (next = el_process_subpacket_reg(header))) {
208 printk("%s** Unexpected header CLASS %d TYPE %d"
209 " -- aborting.\n",
210 err_print_prefix,
211 header->class, header->type);
212 }
213 break;
214 }
215
216 return next;
217 }
218
219 void
220 el_annotate_subpacket(struct el_subpacket *header)
221 {
222 struct el_subpacket_annotation *a;
223 char **annotation = NULL;
224
225 for (a = subpacket_annotation_list; a; a = a->next) {
226 if (a->class == header->class &&
227 a->type == header->type &&
228 a->revision == header->revision) {
229 /*
230 * We found the annotation
231 */
232 annotation = a->annotation;
233 printk("%s %s\n", err_print_prefix, a->description);
234 break;
235 }
236 }
237
238 mchk_dump_mem(header, header->length, annotation);
239 }
240
241 static void __init
242 cdl_process_console_data_log(int cpu, struct percpu_struct *pcpu)
243 {
244 struct el_subpacket *header = (struct el_subpacket *)
245 (IDENT_ADDR | pcpu->console_data_log_pa);
246 int err;
247
248 printk("%s******* CONSOLE DATA LOG FOR CPU %d. *******\n"
249 "*** Error(s) were logged on a previous boot\n",
250 err_print_prefix, cpu);
251
252 for (err = 0; header && (header->class != EL_CLASS__TERMINATION); err++)
253 header = el_process_subpacket(header);
254
255 /* let the console know it's ok to clear the error(s) at restart */
256 pcpu->console_data_log_pa = 0;
257
258 printk("%s*** %d total error(s) logged\n"
259 "**** END OF CONSOLE DATA LOG FOR CPU %d ****\n",
260 err_print_prefix, err, cpu);
261 }
262
263 void __init
264 cdl_check_console_data_log(void)
265 {
266 struct percpu_struct *pcpu;
267 unsigned long cpu;
268
269 for (cpu = 0; cpu < hwrpb->nr_processors; cpu++) {
270 pcpu = (struct percpu_struct *)
271 ((unsigned long)hwrpb + hwrpb->processor_offset
272 + cpu * hwrpb->processor_size);
273 if (pcpu->console_data_log_pa)
274 cdl_process_console_data_log(cpu, pcpu);
275 }
276
277 }
278
279 int __init
280 cdl_register_subpacket_annotation(struct el_subpacket_annotation *new)
281 {
282 struct el_subpacket_annotation *a = subpacket_annotation_list;
283
284 if (a == NULL) subpacket_annotation_list = new;
285 else {
286 for (; a->next != NULL; a = a->next) {
287 if ((a->class == new->class && a->type == new->type) ||
288 a == new) {
289 printk("Attempted to re-register "
290 "subpacket annotation\n");
291 return -EINVAL;
292 }
293 }
294 a->next = new;
295 }
296 new->next = NULL;
297
298 return 0;
299 }
300
301 int __init
302 cdl_register_subpacket_handler(struct el_subpacket_handler *new)
303 {
304 struct el_subpacket_handler *h = subpacket_handler_list;
305
306 if (h == NULL) subpacket_handler_list = new;
307 else {
308 for (; h->next != NULL; h = h->next) {
309 if (h->class == new->class || h == new) {
310 printk("Attempted to re-register "
311 "subpacket handler\n");
312 return -EINVAL;
313 }
314 }
315 h->next = new;
316 }
317 new->next = NULL;
318
319 return 0;
320 }
321
322
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