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/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <err.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <inttypes.h>
#include <stdbool.h>
#include <stddef.h>
#include <unistd.h>
#include "../ccan/endian/endian.h"
#include "../ccan/short_types/short_types.h"
#include <trace_types.h>
/* Handles trace from debugfs (one record at a time) or file */
static bool get_trace(int fd, union trace *t, int *len)
{
void *dest = t;
int r;
/* Move down any extra we read last time. */
if (*len >= sizeof(t->hdr) && *len >= t->hdr.len_div_8 * 8) {
u8 rlen = t->hdr.len_div_8 * 8;
memmove(dest, dest + rlen, *len - rlen);
*len -= rlen;
}
r = read(fd, dest + *len, sizeof(*t) - *len);
if (r < 0)
return false;
*len += r;
/* We should have a complete record. */
return *len >= sizeof(t->hdr) && *len >= t->hdr.len_div_8 * 8;
}
static void display_header(const struct trace_hdr *h)
{
static u64 prev_ts;
u64 ts = be64_to_cpu(h->timestamp);
printf("%16lx (+%8lx) [%03x] : ",
ts, prev_ts ? (ts - prev_ts) : 0, h->cpu);
prev_ts = ts;
}
static void dump_fsp_event(struct trace_fsp_event *t)
{
printf("FSP_EVT [st=%d] ", t->fsp_state);
switch(t->event) {
case TRACE_FSP_EVT_LINK_DOWN:
printf("LINK DOWN");
break;
case TRACE_FSP_EVT_DISR_CHG:
printf("DISR CHANGE (0x%08x)", t->data[0]);
break;
case TRACE_FSP_EVT_SOFT_RR:
printf("SOFT R&R (DISR=0x%08x)", t->data[0]);
break;
case TRACE_FSP_EVT_RR_COMPL:
printf("R&R COMPLETE");
break;
case TRACE_FSP_EVT_HDES_CHG:
printf("HDES CHANGE (0x%08x)", t->data[0]);
break;
case TRACE_FSP_EVT_POLL_IRQ:
printf("%s HDIR=%08x CTL=%08x PSI_IRQ=%d",
t->data[0] ? "IRQ " : "POLL", t->data[1],
t->data[2], t->data[3]);
break;
default:
printf("Unknown %d (d: %08x %08x %08x %08x)",
t->event, t->data[0], t->data[1],
t->data[2], t->data[3]);
}
printf("\n");
}
static void dump_opal_call(struct trace_opal *t)
{
unsigned int i, n;
printf("OPAL CALL %"PRIu64, be64_to_cpu(t->token));
printf(" LR=0x%016"PRIx64" SP=0x%016"PRIx64,
be64_to_cpu(t->lr), be64_to_cpu(t->sp));
n = (t->hdr.len_div_8 * 8 - offsetof(union trace, opal.r3_to_11))
/ sizeof(u64);
for (i = 0; i < n; i++)
printf(" R%u=0x%016"PRIx64,
i+3, be64_to_cpu(t->r3_to_11[i]));
printf("\n");
}
static void dump_fsp_msg(struct trace_fsp_msg *t)
{
unsigned int i;
printf("FSP_MSG: CMD %u SEQ %u MOD %u SUB %u DLEN %u %s [",
be32_to_cpu(t->word0) & 0xFFFF,
be32_to_cpu(t->word0) >> 16,
be32_to_cpu(t->word1) >> 8,
be32_to_cpu(t->word1) & 0xFF,
t->dlen,
t->dir == TRACE_FSP_MSG_IN ? "IN" :
(t->dir == TRACE_FSP_MSG_OUT ? "OUT" : "UNKNOWN"));
for (i = 0; i < t->dlen; i++)
printf("%s%02x", i ? " " : "", t->data[i]);
printf("]\n");
}
static void dump_uart(struct trace_uart *t)
{
switch(t->ctx) {
case TRACE_UART_CTX_IRQ:
printf(": IRQ IRQEN=%d IN_CNT=%d\n",
!t->irq_state, t->in_count);
break;
case TRACE_UART_CTX_POLL:
printf(": POLL IRQEN=%d IN_CNT=%d\n",
!t->irq_state, t->in_count);
break;
case TRACE_UART_CTX_READ:
printf(": READ IRQEN=%d IN_CNT=%d READ=%d\n",
!t->irq_state, t->in_count, t->cnt);
break;
default:
printf(": ???? IRQEN=%d IN_CNT=%d\n",
!t->irq_state, t->in_count);
break;
}
}
int main(int argc, char *argv[])
{
int fd, len = 0;
union trace t;
const char *in = "/sys/kernel/debug/powerpc/opal-trace";
if (argc > 2)
errx(1, "Usage: dump_trace [file]");
if (argv[1])
in = argv[1];
fd = open(in, O_RDONLY);
if (fd < 0)
err(1, "Opening %s", in);
while (get_trace(fd, &t, &len)) {
display_header(&t.hdr);
switch (t.hdr.type) {
case TRACE_REPEAT:
printf("REPEATS: %u times\n",
be32_to_cpu(t.repeat.num));
break;
case TRACE_OVERFLOW:
printf("**OVERFLOW**: %"PRIu64" bytes missed\n",
be64_to_cpu(t.overflow.bytes_missed));
break;
case TRACE_OPAL:
dump_opal_call(&t.opal);
break;
case TRACE_FSP_MSG:
dump_fsp_msg(&t.fsp_msg);
break;
case TRACE_FSP_EVENT:
dump_fsp_event(&t.fsp_evt);
break;
case TRACE_UART:
dump_uart(&t.uart);
break;
default:
printf("UNKNOWN(%u) CPU %u length %u\n",
t.hdr.type, be16_to_cpu(t.hdr.cpu),
t.hdr.len_div_8 * 8);
}
}
return 0;
}
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