1 /*
2 * Copyright (C) 2022 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 #include "src/trace_processor/importers/i2c/i2c_tracker.h"
18 #include "perfetto/ext/base/string_utils.h"
19
20 namespace perfetto {
21 namespace trace_processor {
22
I2cTracker(TraceProcessorContext * context)23 I2cTracker::I2cTracker(TraceProcessorContext* context) : context_(context) {
24 for (size_t i = 0; i < kMaxI2cAdapters; i++) {
25 StringId id = kNullStringId;
26 base::StackString<255> adapter_name("i2c-%zu", i);
27 id = context_->storage->InternString(adapter_name.string_view());
28 i2c_adapter_to_string_id_[i] = id;
29 }
30 }
31
32 I2cTracker::~I2cTracker() = default;
33
Enter(int64_t ts,UniqueTid utid,uint32_t adapter_nr,uint32_t msg_nr)34 void I2cTracker::Enter(int64_t ts,
35 UniqueTid utid,
36 uint32_t adapter_nr,
37 uint32_t msg_nr) {
38 StringId name = i2c_adapter_to_string_id_[adapter_nr];
39 if (name.is_null())
40 return;
41 TrackId track_id = context_->track_tracker->InternThreadTrack(utid);
42 std::vector<I2cAdapterMessageCount>& ops = inflight_i2c_ops_[utid];
43 if (ops.empty()) {
44 context_->slice_tracker->Begin(ts, track_id, kNullStringId, name);
45 I2cAdapterMessageCount req_count;
46 req_count.adapter_nr = adapter_nr;
47 req_count.nr_msgs = msg_nr + 1;
48 ops.push_back(req_count);
49 } else {
50 ops.back().nr_msgs = std::max(msg_nr + 1, ops.back().nr_msgs);
51 }
52 }
53
Exit(int64_t ts,UniqueTid utid,uint32_t adapter_nr,uint32_t nr_msgs)54 void I2cTracker::Exit(int64_t ts,
55 UniqueTid utid,
56 uint32_t adapter_nr,
57 uint32_t nr_msgs) {
58 StringId name = i2c_adapter_to_string_id_[adapter_nr];
59 if (name.is_null())
60 return;
61 std::vector<I2cAdapterMessageCount>& ops = inflight_i2c_ops_[utid];
62 if (ops.empty())
63 return;
64 if (ops.back().adapter_nr != adapter_nr || ops.back().nr_msgs != nr_msgs)
65 return;
66 TrackId track_id = context_->track_tracker->InternThreadTrack(utid);
67 ops.pop_back();
68 context_->slice_tracker->End(ts, track_id, kNullStringId, name);
69 }
70
71 } // namespace trace_processor
72 } // namespace perfetto
73