| /* |
| * Copyright (C) 2022 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef SRC_TRACE_PROCESSOR_IMPORTERS_I2C_I2C_TRACKER_H_ |
| #define SRC_TRACE_PROCESSOR_IMPORTERS_I2C_I2C_TRACKER_H_ |
| |
| #include <limits> |
| #include <tuple> |
| |
| #include "perfetto/ext/base/flat_hash_map.h" |
| #include "perfetto/ext/base/string_view.h" |
| #include "src/trace_processor/importers/common/slice_tracker.h" |
| #include "src/trace_processor/importers/common/track_tracker.h" |
| #include "src/trace_processor/storage/trace_storage.h" |
| #include "src/trace_processor/types/destructible.h" |
| #include "src/trace_processor/types/trace_processor_context.h" |
| |
| namespace perfetto { |
| namespace trace_processor { |
| |
| static constexpr size_t kMaxI2cAdapters = 256; |
| |
| using I2cAdapterId = uint32_t; |
| |
| class I2cTracker : public Destructible { |
| public: |
| I2cTracker(const I2cTracker&) = delete; |
| I2cTracker& operator=(const I2cTracker&) = delete; |
| ~I2cTracker() override; |
| static I2cTracker* GetOrCreate(TraceProcessorContext* context) { |
| if (!context->i2c_tracker) { |
| context->i2c_tracker.reset(new I2cTracker(context)); |
| } |
| return static_cast<I2cTracker*>(context->i2c_tracker.get()); |
| } |
| |
| struct I2cAdapterMessageCount { |
| I2cAdapterId adapter_nr{}; |
| uint32_t nr_msgs{}; |
| }; |
| |
| // Enter processes the start of an I2C transaction, which consists of a |
| // series i2c_write and i2c_read's. Multiple messages may be included in a |
| // transaction. The position of a write or read message in the transaction |
| // is indicated by the msg_nr field. |
| void Enter(int64_t ts, UniqueTid utid, uint32_t adapter_nr, uint32_t msg_nr); |
| |
| // Exit processes the end of an I2C transaction, which is indicated by an |
| // i2c_result. The nr_msgs field indicates how many write or read requests |
| // are considered to be matching the current i2c_result. |
| void Exit(int64_t ts, UniqueTid utid, uint32_t adapter_nr, uint32_t nr_msgs); |
| |
| private: |
| explicit I2cTracker(TraceProcessorContext*); |
| TraceProcessorContext* const context_; |
| std::array<StringId, kMaxI2cAdapters> i2c_adapter_to_string_id_{}; |
| |
| // In-flight I2C operation counts per I2C adapter per Unique TID. This is |
| // used to match an i2c_result message against the i2c_read and i2c_write |
| // messages that precede it in the transaction. |
| base::FlatHashMap<UniqueTid, std::vector<I2cAdapterMessageCount>> |
| inflight_i2c_ops_; |
| }; |
| |
| } // namespace trace_processor |
| } // namespace perfetto |
| |
| #endif // SRC_TRACE_PROCESSOR_IMPORTERS_I2C_I2C_TRACKER_H_ |