// SPDX-License-Identifier: GPL-2.0
/*
* linux/arch/alpha/kernel/err_common.c
*
* Copyright (C) 2000 Jeff Wiedemeier (Compaq Computer Corporation)
*
* Error handling code supporting Alpha systems
*/
#include <linux/init.h>
#include <linux/sched.h>
#include <asm/io.h>
#include <asm/hwrpb.h>
#include <asm/smp.h>
#include <asm/err_common.h>
#include "err_impl.h"
#include "proto.h"
/*
* err_print_prefix -- error handling print routines should prefix
* all prints with this
*/
char *err_print_prefix = KERN_NOTICE;
/*
* Generic
*/
void
mchk_dump_mem(void *data, size_t length, char **annotation)
{
unsigned long *ldata = data;
size_t i;
for (i = 0; (i * sizeof(*ldata)) < length; i++) {
if (annotation && !annotation[i])
annotation = NULL;
printk("%s %08x: %016lx %s\n",
err_print_prefix,
(unsigned)(i * sizeof(*ldata)), ldata[i],
annotation ? annotation[i] : "");
}
}
void
mchk_dump_logout_frame(struct el_common *mchk_header)
{
printk("%s -- Frame Header --\n"
" Frame Size: %d (0x%x) bytes\n"
" Flags: %s%s\n"
" MCHK Code: 0x%x\n"
" Frame Rev: %d\n"
" Proc Offset: 0x%08x\n"
" Sys Offset: 0x%08x\n"
" -- Processor Region --\n",
err_print_prefix,
mchk_header->size, mchk_header->size,
mchk_header->retry ? "RETRY " : "",
mchk_header->err2 ? "SECOND_ERR " : "",
mchk_header->code,
mchk_header->frame_rev,
mchk_header->proc_offset,
mchk_header->sys_offset);
mchk_dump_mem((void *)
((unsigned long)mchk_header + mchk_header->proc_offset),
mchk_header->sys_offset - mchk_header->proc_offset,
NULL);
printk("%s -- System Region --\n", err_print_prefix);
mchk_dump_mem((void *)
((unsigned long)mchk_header + mchk_header->sys_offset),
mchk_header->size - mchk_header->sys_offset,
NULL);
printk("%s -- End of Frame --\n", err_print_prefix);
}
/*
* Console Data Log
*/
/* Data */
static struct el_subpacket_handler *subpacket_handler_list = NULL;
static struct el_subpacket_annotation *subpacket_annotation_list = NULL;
static struct el_subpacket *
el_process_header_subpacket(struct el_subpacket *header)
{
union el_timestamp timestamp;
char *name = "UNKNOWN EVENT";
int packet_count = 0;
int length = 0;
if (header->class != EL_CLASS__HEADER) {
printk("%s** Unexpected header CLASS %d TYPE %d, aborting\n",
err_print_prefix,
header->class, header->type);
return NULL;
}
switch(header->type) {
case EL_TYPE__HEADER__SYSTEM_ERROR_FRAME:
name = "SYSTEM ERROR";
length = header->by_type.sys_err.frame_length;
packet_count =
header->by_type.sys_err.frame_packet_count;
timestamp.as_int = 0;
break;
case EL_TYPE__HEADER__SYSTEM_EVENT_FRAME:
name = "SYSTEM EVENT";
length = header->by_type.sys_event.frame_length;
packet_count =
header->by_type.sys_event.frame_packet_count;
timestamp = header->by_type.sys_event.timestamp;
break;
case EL_TYPE__HEADER__HALT_FRAME:
name = "ERROR HALT";
length = header->by_type.err_halt.frame_length;
packet_count =
header->by_type.err_halt.frame_packet_count;
timestamp = header->by_type.err_halt.timestamp;
break;
case EL_TYPE__HEADER__LOGOUT_FRAME:
name = "LOGOUT FRAME";
length = header->by_type.logout_header.frame_length;
packet_count = 1;
timestamp.as_int = 0;
break;
default: /* Unknown */
printk("%s** Unknown header - CLASS %d TYPE %d, aborting\n",
err_print_prefix,
header->class, header->type);
return NULL;
}
printk("%s*** %s:\n"
" CLASS %d, TYPE %d\n",
err_print_prefix,
name,
header->class, header->type);
el_print_timestamp(×tamp);
/*
* Process the subpackets
*/
el_process_subpackets(header, packet_count);
/* return the next header */
header = (struct el_subpacket *)
((unsigned long)header + header->length + length);
return header;
}
static struct el_subpacket *
el_process_subpacket_reg(struct el_subpacket *header)
{
struct el_subpacket *next = NULL;
struct el_subpacket_handler *h = subpacket_handler_list;
for (; h && h->class != header->class; h = h->next);
if (h) next = h->handler(header);
return next;
}
void
el_print_timestamp(union el_timestamp *timestamp)
{
if (timestamp->as_int)
printk("%s TIMESTAMP: %d/%d/%02d %d:%02d:%0d\n",
err_print_prefix,
timestamp->b.month, timestamp->b.day,
timestamp->b.year, timestamp->b.hour,
timestamp->b.minute, timestamp->b.second);
}
void
el_process_subpackets(struct el_subpacket *header, int packet_count)
{
struct el_subpacket *subpacket;
int i;
subpacket = (struct el_subpacket *)
((unsigned long)header + header->length);
for (i = 0; subpacket && i < packet_count; i++) {
printk("%sPROCESSING SUBPACKET %d\n", err_print_prefix, i);
subpacket = el_process_subpacket(subpacket);
}
}
struct el_subpacket *
el_process_subpacket(struct el_subpacket *header)
{
struct el_subpacket *next = NULL;
switch(header->class) {
case EL_CLASS__TERMINATION:
/* Termination packet, there are no more */
break;
case EL_CLASS__HEADER:
next = el_process_header_subpacket(header);
break;
default:
if (NULL == (next = el_process_subpacket_reg(header))) {
printk("%s** Unexpected header CLASS %d TYPE %d"
" -- aborting.\n",
err_print_prefix,
header->class, header->type);
}
break;
}
return next;
}
void
el_annotate_subpacket(struct el_subpacket *header)
{
struct el_subpacket_annotation *a;
char **annotation = NULL;
for (a = subpacket_annotation_list; a; a = a->next) {
if (a->class == header->class &&
a->type == header->type &&
a->revision == header->revision) {
/*
* We found the annotation
*/
annotation = a->annotation;
printk("%s %s\n", err_print_prefix, a->description);
break;
}
}
mchk_dump_mem(header, header->length, annotation);
}
static void __init
cdl_process_console_data_log(int cpu, struct percpu_struct *pcpu)
{
struct el_subpacket *header = (struct el_subpacket *)
(IDENT_ADDR | pcpu->console_data_log_pa);
int err;
printk("%s******* CONSOLE DATA LOG FOR CPU %d. *******\n"
"*** Error(s) were logged on a previous boot\n",
err_print_prefix, cpu);
for (err = 0; header && (header->class != EL_CLASS__TERMINATION); err++)
header = el_process_subpacket(header);
/* let the console know it's ok to clear the error(s) at restart */
pcpu->console_data_log_pa = 0;
printk("%s*** %d total error(s) logged\n"
"**** END OF CONSOLE DATA LOG FOR CPU %d ****\n",
err_print_prefix, err, cpu);
}
void __init
cdl_check_console_data_log(void)
{
struct percpu_struct *pcpu;
unsigned long cpu;
for (cpu = 0; cpu < hwrpb->nr_processors; cpu++) {
pcpu = (struct percpu_struct *)
((unsigned long)hwrpb + hwrpb->processor_offset
+ cpu * hwrpb->processor_size);
if (pcpu->console_data_log_pa)
cdl_process_console_data_log(cpu, pcpu);
}
}
int __init
cdl_register_subpacket_annotation(struct el_subpacket_annotation *new)
{
struct el_subpacket_annotation *a = subpacket_annotation_list;
if (a == NULL) subpacket_annotation_list = new;
else {
for (; a->next != NULL; a = a->next) {
if ((a->class == new->class && a->type == new->type) ||
a == new) {
printk("Attempted to re-register "
"subpacket annotation\n");
return -EINVAL;
}
}
a->next = new;
}
new->next = NULL;
return 0;
}
int __init
cdl_register_subpacket_handler(struct el_subpacket_handler *new)
{
struct el_subpacket_handler *h = subpacket_handler_list;
if (h == NULL) subpacket_handler_list = new;
else {
for (; h->next != NULL; h = h->next) {
if (h->class == new->class || h == new) {
printk("Attempted to re-register "
"subpacket handler\n");
return -EINVAL;
}
}
h->next = new;
}
new->next = NULL;
return 0;
}