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
30 struct 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
38 struct hisi_ptt_queue {
39 struct hisi_ptt *ptt;
40 struct auxtrace_buffer *buffer;
41 };
42
hisi_ptt_check_packet_type(unsigned char * buf)43 static 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
hisi_ptt_dump(struct hisi_ptt * ptt __maybe_unused,unsigned char * buf,size_t len)53 static 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
hisi_ptt_dump_event(struct hisi_ptt * ptt,unsigned char * buf,size_t len)76 static 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
hisi_ptt_process_event(struct perf_session * session __maybe_unused,union perf_event * event __maybe_unused,struct perf_sample * sample __maybe_unused,struct perf_tool * tool __maybe_unused)84 static 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
hisi_ptt_process_auxtrace_event(struct perf_session * session,union perf_event * event,struct perf_tool * tool __maybe_unused)92 static 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(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(session->data)) {
108 data_offset = 0;
109 } else {
110 data_offset = lseek(fd, 0, SEEK_CUR);
111 if (data_offset == -1)
112 return -errno;
113 }
114
115 err = readn(fd, data, size);
116 if (err != (ssize_t)size) {
117 free(data);
118 return -errno;
119 }
120
121 if (dump_trace)
122 hisi_ptt_dump_event(ptt, data, size);
123
124 return 0;
125 }
126
hisi_ptt_flush(struct perf_session * session __maybe_unused,struct perf_tool * tool __maybe_unused)127 static int hisi_ptt_flush(struct perf_session *session __maybe_unused,
128 struct perf_tool *tool __maybe_unused)
129 {
130 return 0;
131 }
132
hisi_ptt_free_events(struct perf_session * session __maybe_unused)133 static void hisi_ptt_free_events(struct perf_session *session __maybe_unused)
134 {
135 }
136
hisi_ptt_free(struct perf_session * session)137 static void hisi_ptt_free(struct perf_session *session)
138 {
139 struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt,
140 auxtrace);
141
142 session->auxtrace = NULL;
143 free(ptt);
144 }
145
hisi_ptt_evsel_is_auxtrace(struct perf_session * session,struct evsel * evsel)146 static bool hisi_ptt_evsel_is_auxtrace(struct perf_session *session,
147 struct evsel *evsel)
148 {
149 struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt, auxtrace);
150
151 return evsel->core.attr.type == ptt->pmu_type;
152 }
153
hisi_ptt_print_info(__u64 type)154 static void hisi_ptt_print_info(__u64 type)
155 {
156 if (!dump_trace)
157 return;
158
159 fprintf(stdout, " PMU Type %" PRId64 "\n", (s64) type);
160 }
161
hisi_ptt_process_auxtrace_info(union perf_event * event,struct perf_session * session)162 int hisi_ptt_process_auxtrace_info(union perf_event *event,
163 struct perf_session *session)
164 {
165 struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info;
166 struct hisi_ptt *ptt;
167
168 if (auxtrace_info->header.size < HISI_PTT_AUXTRACE_PRIV_SIZE +
169 sizeof(struct perf_record_auxtrace_info))
170 return -EINVAL;
171
172 ptt = zalloc(sizeof(*ptt));
173 if (!ptt)
174 return -ENOMEM;
175
176 ptt->session = session;
177 ptt->machine = &session->machines.host; /* No kvm support */
178 ptt->auxtrace_type = auxtrace_info->type;
179 ptt->pmu_type = auxtrace_info->priv[0];
180
181 ptt->auxtrace.process_event = hisi_ptt_process_event;
182 ptt->auxtrace.process_auxtrace_event = hisi_ptt_process_auxtrace_event;
183 ptt->auxtrace.flush_events = hisi_ptt_flush;
184 ptt->auxtrace.free_events = hisi_ptt_free_events;
185 ptt->auxtrace.free = hisi_ptt_free;
186 ptt->auxtrace.evsel_is_auxtrace = hisi_ptt_evsel_is_auxtrace;
187 session->auxtrace = &ptt->auxtrace;
188
189 hisi_ptt_print_info(auxtrace_info->priv[0]);
190
191 return 0;
192 }
193