191 lines · c
1// SPDX-License-Identifier: GPL-2.02/*3 * HiSilicon PCIe Trace and Tuning (PTT) support4 * 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 const 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 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 125static int hisi_ptt_flush(struct perf_session *session __maybe_unused,126 const 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}191