1 /* 2 * Copyright (C) 2025 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 #ifdef __ANDROID__ 19 20 #include <perfetto/trace/android/bluetooth_trace.pbzero.h> 21 #include <perfetto/tracing.h> 22 23 #include "hal/snoop_logger.h" 24 25 namespace bluetooth { 26 namespace hal { 27 28 // BundleKey is used to group packets into bundles organized by direction, type, 29 // and eventual op_code or event_code 30 struct BundleKey { 31 explicit BundleKey(const HciPacket& packet, SnoopLogger::Direction direction, 32 SnoopLogger::PacketType type); 33 34 SnoopLogger::PacketType packet_type; 35 SnoopLogger::Direction direction; 36 std::optional<uint16_t> op_code; 37 std::optional<uint8_t> event_code; 38 std::optional<uint8_t> subevent_code; 39 std::optional<uint16_t> handle; 40 41 bool operator==(const BundleKey& b) const; 42 }; 43 44 // BundleHash is used to hash BundleKeys. 45 struct BundleHash { 46 std::size_t operator()(const BundleKey& a) const; 47 }; 48 49 // BundleDetails contains information about a bundle. 50 struct BundleDetails { 51 uint32_t count = 0; 52 uint32_t total_length = 0; 53 uint64_t start_ts = std::numeric_limits<uint64_t>::max(); 54 uint64_t end_ts = std::numeric_limits<uint64_t>::min(); 55 }; 56 57 class SnoopLoggerTracing : public perfetto::DataSource<SnoopLoggerTracing> { 58 public: 59 static void InitializePerfetto(); 60 static void TracePacket(const HciPacket& packet, SnoopLogger::Direction direction, 61 SnoopLogger::PacketType type); 62 63 void OnSetup(const SetupArgs&) override; 64 void OnStart(const StartArgs&) override; 65 void OnStop(const StopArgs&) override; 66 void OnFlush(const FlushArgs&) override; 67 68 private: 69 static perfetto::protos::pbzero::BluetoothTracePacketType HciToTracePacketType( 70 SnoopLogger::PacketType hci_packet_type, SnoopLogger::Direction direction); 71 72 // Records the packet into the internal buffers. 73 void Record(TraceContext& ctx, const HciPacket& packet, SnoopLogger::Direction direction, 74 SnoopLogger::PacketType type); 75 76 // Writes all pending data from the internal buffer as a new trace packet. 77 void Write(TraceContext& ctx, const BundleKey& key, const BundleDetails& details); 78 79 uint64_t last_flush_ns_ = 0; 80 std::unordered_map<BundleKey, BundleDetails, BundleHash> bttrace_bundles_; 81 }; 82 } // namespace hal 83 } // namespace bluetooth 84 85 PERFETTO_DECLARE_DATA_SOURCE_STATIC_MEMBERS(bluetooth::hal::SnoopLoggerTracing); 86 87 #endif // __ANDROID__ 88