1// SPDX-License-Identifier: GPL-2.0
2/*
3 * HiSilicon PCIe Trace and Tuning (PTT) support
4 * Copyright (c) 2022 HiSilicon Technologies Co., Ltd.
5 */
6
7#include <byteswap.h>
8#include <endian.h>
9#include <errno.h>
10#include <inttypes.h>
11#include <linux/bitops.h>
12#include <linux/kernel.h>
13#include <linux/log2.h>
14#include <linux/types.h>
15#include <linux/zalloc.h>
16#include <stdlib.h>
17#include <unistd.h>
18
19#include "auxtrace.h"
20#include "color.h"
21#include "debug.h"
22#include "evsel.h"
23#include "hisi-ptt.h"
24#include "hisi-ptt-decoder/hisi-ptt-pkt-decoder.h"
25#include "machine.h"
26#include "session.h"
27#include "tool.h"
28#include <internal/lib.h>
29
30struct hisi_ptt {
31 struct auxtrace auxtrace;
32 u32 auxtrace_type;
33 struct perf_session *session;
34 struct machine *machine;
35 u32 pmu_type;
36};
37
38struct hisi_ptt_queue {
39 struct hisi_ptt *ptt;
40 struct auxtrace_buffer *buffer;
41};
42
43static enum hisi_ptt_pkt_type hisi_ptt_check_packet_type(unsigned char *buf)
44{
45 uint32_t head = *(uint32_t *)buf;
46
47 if ((HISI_PTT_8DW_CHECK_MASK & head) == HISI_PTT_IS_8DW_PKT)
48 return HISI_PTT_8DW_PKT;
49
50 return HISI_PTT_4DW_PKT;
51}
52
53static void hisi_ptt_dump(struct hisi_ptt *ptt __maybe_unused,
54 unsigned char *buf, size_t len)
55{
56 const char *color = PERF_COLOR_BLUE;
57 enum hisi_ptt_pkt_type type;
58 size_t pos = 0;
59 int pkt_len;
60
61 type = hisi_ptt_check_packet_type(buf);
62 len = round_down(len, hisi_ptt_pkt_size[type]);
63 color_fprintf(stdout, color, ". ... HISI PTT data: size %zu bytes\n",
64 len);
65
66 while (len > 0) {
67 pkt_len = hisi_ptt_pkt_desc(buf, pos, type);
68 if (!pkt_len)
69 color_fprintf(stdout, color, " Bad packet!\n");
70
71 pos += pkt_len;
72 len -= pkt_len;
73 }
74}
75
76static void hisi_ptt_dump_event(struct hisi_ptt *ptt, unsigned char *buf,
77 size_t len)
78{
79 printf(".\n");
80
81 hisi_ptt_dump(ptt, buf, len);
82}
83
84static int hisi_ptt_process_event(struct perf_session *session __maybe_unused,
85 union perf_event *event __maybe_unused,
86 struct perf_sample *sample __maybe_unused,
87 struct perf_tool *tool __maybe_unused)
88{
89 return 0;
90}
91
92static int hisi_ptt_process_auxtrace_event(struct perf_session *session,
93 union perf_event *event,
94 struct perf_tool *tool __maybe_unused)
95{
96 struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt,
97 auxtrace);
98 int fd = perf_data__fd(data: session->data);
99 int size = event->auxtrace.size;
100 void *data = malloc(size);
101 off_t data_offset;
102 int err;
103
104 if (!data)
105 return -errno;
106
107 if (perf_data__is_pipe(data: session->data)) {
108 data_offset = 0;
109 } else {
110 data_offset = lseek(fd, 0, SEEK_CUR);
111 if (data_offset == -1) {
112 free(data);
113 return -errno;
114 }
115 }
116
117 err = readn(fd, data, size);
118 if (err != (ssize_t)size) {
119 free(data);
120 return -errno;
121 }
122
123 if (dump_trace)
124 hisi_ptt_dump_event(ptt, buf: data, len: size);
125
126 free(data);
127 return 0;
128}
129
130static int hisi_ptt_flush(struct perf_session *session __maybe_unused,
131 struct perf_tool *tool __maybe_unused)
132{
133 return 0;
134}
135
136static void hisi_ptt_free_events(struct perf_session *session __maybe_unused)
137{
138}
139
140static void hisi_ptt_free(struct perf_session *session)
141{
142 struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt,
143 auxtrace);
144
145 session->auxtrace = NULL;
146 free(ptt);
147}
148
149static bool hisi_ptt_evsel_is_auxtrace(struct perf_session *session,
150 struct evsel *evsel)
151{
152 struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt, auxtrace);
153
154 return evsel->core.attr.type == ptt->pmu_type;
155}
156
157static void hisi_ptt_print_info(__u64 type)
158{
159 if (!dump_trace)
160 return;
161
162 fprintf(stdout, " PMU Type %" PRId64 "\n", (s64) type);
163}
164
165int hisi_ptt_process_auxtrace_info(union perf_event *event,
166 struct perf_session *session)
167{
168 struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info;
169 struct hisi_ptt *ptt;
170
171 if (auxtrace_info->header.size < HISI_PTT_AUXTRACE_PRIV_SIZE +
172 sizeof(struct perf_record_auxtrace_info))
173 return -EINVAL;
174
175 ptt = zalloc(sizeof(*ptt));
176 if (!ptt)
177 return -ENOMEM;
178
179 ptt->session = session;
180 ptt->machine = &session->machines.host; /* No kvm support */
181 ptt->auxtrace_type = auxtrace_info->type;
182 ptt->pmu_type = auxtrace_info->priv[0];
183
184 ptt->auxtrace.process_event = hisi_ptt_process_event;
185 ptt->auxtrace.process_auxtrace_event = hisi_ptt_process_auxtrace_event;
186 ptt->auxtrace.flush_events = hisi_ptt_flush;
187 ptt->auxtrace.free_events = hisi_ptt_free_events;
188 ptt->auxtrace.free = hisi_ptt_free;
189 ptt->auxtrace.evsel_is_auxtrace = hisi_ptt_evsel_is_auxtrace;
190 session->auxtrace = &ptt->auxtrace;
191
192 hisi_ptt_print_info(type: auxtrace_info->priv[0]);
193
194 return 0;
195}
196

source code of linux/tools/perf/util/hisi-ptt.c