1 /*
2 * Copyright (c) 2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15 #include "usb_ddk_hash.h"
16 #include <functional>
17 #include <mutex>
18 #include <unordered_map>
19 #include <iostream>
20
21 #include "hdf_base.h"
22 #include "usbd_wrapper.h"
23
24 static std::unordered_map<uint64_t, InterfaceInfo> g_hashMap;
25 std::mutex g_mapMutex;
26
27 constexpr size_t MAX_HASH_RECORD = 1000;
28
UsbDdkHash(const InterfaceInfo & info,uint64_t & hashVal)29 int32_t UsbDdkHash(const InterfaceInfo &info, uint64_t &hashVal)
30 {
31 std::lock_guard<std::mutex> lock(g_mapMutex);
32
33 if (g_hashMap.size() > MAX_HASH_RECORD) {
34 return HDF_ERR_OUT_OF_RANGE;
35 }
36
37 hashVal = static_cast<uint64_t>(std::hash<uint64_t> {}(info.addr));
38 g_hashMap.emplace(hashVal, info);
39 return HDF_SUCCESS;
40 }
41
UsbDdkUnHash(uint64_t hashVal,uint64_t & addr)42 int32_t UsbDdkUnHash(uint64_t hashVal, uint64_t &addr)
43 {
44 std::lock_guard<std::mutex> lock(g_mapMutex);
45 if (auto ret = g_hashMap.find(hashVal); ret == g_hashMap.end()) {
46 return HDF_ERR_INVALID_PARAM;
47 }
48 auto mappedVal = g_hashMap[hashVal];
49 addr = mappedVal.addr;
50 return HDF_SUCCESS;
51 }
52
UsbDdkDelHashRecord(uint64_t hashVal)53 void UsbDdkDelHashRecord(uint64_t hashVal)
54 {
55 std::lock_guard<std::mutex> lock(g_mapMutex);
56 g_hashMap.erase(hashVal);
57 }
58
UsbDdkGetRecordByVal(const InterfaceInfo & info,uint64_t & hashVal)59 bool UsbDdkGetRecordByVal(const InterfaceInfo &info, uint64_t &hashVal)
60 {
61 std::lock_guard<std::mutex> lock(g_mapMutex);
62 for (auto it = g_hashMap.begin(); it != g_hashMap.end(); it++) {
63 if (it->second.busNum == info.busNum && it->second.devNum == info.devNum) {
64 hashVal = it->first;
65 return true;
66 }
67 }
68 return false;
69 }