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Linux/arch/alpha/kernel/err_common.c

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  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(&timestamp);
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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