tools/perf/util/hisi-ptt.c

   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 static 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
  48 static 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
  71 static 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
  79 static 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                                   const struct perf_tool *tool __maybe_unused)
  83 {
  84         return 0;
  85 }
  86
  87 static int hisi_ptt_process_auxtrace_event(struct perf_session *session,
  88                                            union perf_event *event,
  89                                            const 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
 125 static int hisi_ptt_flush(struct perf_session *session __maybe_unused,
 126                           const struct perf_tool *tool __maybe_unused)
 127 {
 128         return 0;
 129 }
 130
 131 static void hisi_ptt_free_events(struct perf_session *session __maybe_unused)
 132 {
 133 }
 134
 135 static 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
 144 static 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
 152 static 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
 160 int 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 }