tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
38static enum hisi_ptt_pkt_type hisi_ptt_check_packet_type(unsigned char *buf)
39{
40 uint32_t head = *(uint32_t *)buf;
41
42 if ((HISI_PTT_8DW_CHECK_MASK & head) == HISI_PTT_IS_8DW_PKT)
43 return HISI_PTT_8DW_PKT;
44
45 return HISI_PTT_4DW_PKT;
46}
47
48static void hisi_ptt_dump(struct hisi_ptt *ptt __maybe_unused,
49 unsigned char *buf, size_t len)
50{
51 const char *color = PERF_COLOR_BLUE;
52 enum hisi_ptt_pkt_type type;
53 size_t pos = 0;
54 int pkt_len;
55
56 type = hisi_ptt_check_packet_type(buf);
57 len = round_down(len, hisi_ptt_pkt_size[type]);
58 color_fprintf(stdout, color, ". ... HISI PTT data: size %zu bytes\n",
59 len);
60
61 while (len > 0) {
62 pkt_len = hisi_ptt_pkt_desc(buf, pos, type);
63 if (!pkt_len)
64 color_fprintf(stdout, color, " Bad packet!\n");
65
66 pos += pkt_len;
67 len -= pkt_len;
68 }
69}
70
71static void hisi_ptt_dump_event(struct hisi_ptt *ptt, unsigned char *buf,
72 size_t len)
73{
74 printf(".\n");
75
76 hisi_ptt_dump(ptt, buf, len);
77}
78
79static int hisi_ptt_process_event(struct perf_session *session __maybe_unused,
80 union perf_event *event __maybe_unused,
81 struct perf_sample *sample __maybe_unused,
82 struct perf_tool *tool __maybe_unused)
83{
84 return 0;
85}
86
87static int hisi_ptt_process_auxtrace_event(struct perf_session *session,
88 union perf_event *event,
89 struct perf_tool *tool __maybe_unused)
90{
91 struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt,
92 auxtrace);
93 int fd = perf_data__fd(session->data);
94 int size = event->auxtrace.size;
95 void *data = malloc(size);
96 off_t data_offset;
97 int err;
98
99 if (!data)
100 return -errno;
101
102 if (perf_data__is_pipe(session->data)) {
103 data_offset = 0;
104 } else {
105 data_offset = lseek(fd, 0, SEEK_CUR);
106 if (data_offset == -1) {
107 free(data);
108 return -errno;
109 }
110 }
111
112 err = readn(fd, data, size);
113 if (err != (ssize_t)size) {
114 free(data);
115 return -errno;
116 }
117
118 if (dump_trace)
119 hisi_ptt_dump_event(ptt, data, size);
120
121 free(data);
122 return 0;
123}
124
125static int hisi_ptt_flush(struct perf_session *session __maybe_unused,
126 struct perf_tool *tool __maybe_unused)
127{
128 return 0;
129}
130
131static void hisi_ptt_free_events(struct perf_session *session __maybe_unused)
132{
133}
134
135static void hisi_ptt_free(struct perf_session *session)
136{
137 struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt,
138 auxtrace);
139
140 session->auxtrace = NULL;
141 free(ptt);
142}
143
144static bool hisi_ptt_evsel_is_auxtrace(struct perf_session *session,
145 struct evsel *evsel)
146{
147 struct hisi_ptt *ptt = container_of(session->auxtrace, struct hisi_ptt, auxtrace);
148
149 return evsel->core.attr.type == ptt->pmu_type;
150}
151
152static void hisi_ptt_print_info(__u64 type)
153{
154 if (!dump_trace)
155 return;
156
157 fprintf(stdout, " PMU Type %" PRId64 "\n", (s64) type);
158}
159
160int hisi_ptt_process_auxtrace_info(union perf_event *event,
161 struct perf_session *session)
162{
163 struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info;
164 struct hisi_ptt *ptt;
165
166 if (auxtrace_info->header.size < HISI_PTT_AUXTRACE_PRIV_SIZE +
167 sizeof(struct perf_record_auxtrace_info))
168 return -EINVAL;
169
170 ptt = zalloc(sizeof(*ptt));
171 if (!ptt)
172 return -ENOMEM;
173
174 ptt->session = session;
175 ptt->machine = &session->machines.host; /* No kvm support */
176 ptt->auxtrace_type = auxtrace_info->type;
177 ptt->pmu_type = auxtrace_info->priv[0];
178
179 ptt->auxtrace.process_event = hisi_ptt_process_event;
180 ptt->auxtrace.process_auxtrace_event = hisi_ptt_process_auxtrace_event;
181 ptt->auxtrace.flush_events = hisi_ptt_flush;
182 ptt->auxtrace.free_events = hisi_ptt_free_events;
183 ptt->auxtrace.free = hisi_ptt_free;
184 ptt->auxtrace.evsel_is_auxtrace = hisi_ptt_evsel_is_auxtrace;
185 session->auxtrace = &ptt->auxtrace;
186
187 hisi_ptt_print_info(auxtrace_info->priv[0]);
188
189 return 0;
190}