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// SPDX-License-Identifier: GPL-2.0
/*
* HiSilicon PCIe Trace and Tuning (PTT) support
* Copyright (c) 2022 HiSilicon Technologies Co., Ltd.
*/
#include <byteswap.h>
#include <endian.h>
#include <errno.h>
#include <inttypes.h>
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/log2.h>
#include <linux/types.h>
#include <linux/zalloc.h>
#include <stdlib.h>
#include <unistd.h>
#include "auxtrace.h"
#include "color.h"
#include "debug.h"
#include "evsel.h"
#include "hisi-ptt.h"
#include "hisi-ptt-decoder/hisi-ptt-pkt-decoder.h"
#include "machine.h"
#include "session.h"
#include "tool.h"
#include <internal/lib.h>
struct hisi_ptt {
struct auxtrace auxtrace;
u32 auxtrace_type;
struct perf_session *session;
struct machine *machine;
u32 pmu_type;
};
static enum hisi_ptt_pkt_type hisi_ptt_check_packet_type(unsigned char *buf)
{
uint32_t head = *(uint32_t *)buf;
if ((HISI_PTT_8DW_CHECK_MASK & head) == HISI_PTT_IS_8DW_PKT)
return HISI_PTT_8DW_PKT;
return HISI_PTT_4DW_PKT;
}
static void hisi_ptt_dump(struct hisi_ptt *ptt __maybe_unused,
unsigned char *buf, size_t len)
{
const char *color = PERF_COLOR_BLUE;
enum hisi_ptt_pkt_type type;
size_t pos = 0;
int pkt_len;
type = hisi_ptt_check_packet_type(buf);
len = round_down(len, hisi_ptt_pkt_size[type]);
color_fprintf(stdout, color, ". ... HISI PTT data: size %zu bytes\n",
len);
while (len > 0) {
pkt_len = hisi_ptt_pkt_desc(buf, pos, type);
if (!pkt_len)
color_fprintf(stdout, color, " Bad packet!\n");
pos += pkt_len;
len -= pkt_len;
}
}
static void hisi_ptt_dump_event(struct hisi_ptt *ptt, unsigned char *buf,
size_t len)
{
printf(".\n");
hisi_ptt_dump(ptt, buf, len);
}
static int hisi_ptt_process_event(struct perf_session *session __maybe_unused,
union perf_event *event __maybe_unused,
struct perf_sample *sample __maybe_unused,
const struct perf_tool *tool __maybe_unused)
{
return 0;
}
static int hisi_ptt_process_auxtrace_event(struct perf_session *session,
union perf_event *event,
const struct perf_tool *tool __maybe_unused)
{
struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt,
auxtrace);
int fd = perf_data__fd(session->data);
int size = event->auxtrace.size;
void *data = malloc(size);
off_t data_offset;
int err;
if (!data)
return -errno;
if (perf_data__is_pipe(session->data)) {
data_offset = 0;
} else {
data_offset = lseek(fd, 0, SEEK_CUR);
if (data_offset == -1) {
free(data);
return -errno;
}
}
err = readn(fd, data, size);
if (err != (ssize_t)size) {
free(data);
return -errno;
}
if (dump_trace)
hisi_ptt_dump_event(ptt, data, size);
free(data);
return 0;
}
static int hisi_ptt_flush(struct perf_session *session __maybe_unused,
const struct perf_tool *tool __maybe_unused)
{
return 0;
}
static void hisi_ptt_free_events(struct perf_session *session __maybe_unused)
{
}
static void hisi_ptt_free(struct perf_session *session)
{
struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt,
auxtrace);
session->auxtrace = NULL;
free(ptt);
}
static bool hisi_ptt_evsel_is_auxtrace(struct perf_session *session,
struct evsel *evsel)
{
struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt, auxtrace);
return evsel->core.attr.type == ptt->pmu_type;
}
static void hisi_ptt_print_info(__u64 type)
{
if (!dump_trace)
return;
fprintf(stdout, " PMU Type %" PRId64 "\n", (s64) type);
}
int hisi_ptt_process_auxtrace_info(union perf_event *event,
struct perf_session *session)
{
struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info;
struct hisi_ptt *ptt;
if (auxtrace_info->header.size < HISI_PTT_AUXTRACE_PRIV_SIZE +
sizeof(struct perf_record_auxtrace_info))
return -EINVAL;
ptt = zalloc(sizeof(*ptt));
if (!ptt)
return -ENOMEM;
ptt->session = session;
ptt->machine = &session->machines.host; /* No kvm support */
ptt->auxtrace_type = auxtrace_info->type;
ptt->pmu_type = auxtrace_info->priv[0];
ptt->auxtrace.process_event = hisi_ptt_process_event;
ptt->auxtrace.process_auxtrace_event = hisi_ptt_process_auxtrace_event;
ptt->auxtrace.flush_events = hisi_ptt_flush;
ptt->auxtrace.free_events = hisi_ptt_free_events;
ptt->auxtrace.free = hisi_ptt_free;
ptt->auxtrace.evsel_is_auxtrace = hisi_ptt_evsel_is_auxtrace;
session->auxtrace = &ptt->auxtrace;
hisi_ptt_print_info(auxtrace_info->priv[0]);
return 0;
}
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