1 // Copyright 2021 Google LLC 2 // 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 "cpld.hpp" 16 17 #include "commands.hpp" 18 #include "errors.hpp" 19 #include "handler.hpp" 20 21 #include <ipmid/api-types.hpp> 22 #include <stdplus/print.hpp> 23 24 #include <cstring> 25 #include <span> 26 #include <vector> 27 28 namespace google 29 { 30 namespace ipmi 31 { 32 33 struct CpldRequest 34 { 35 uint8_t id; 36 } __attribute__((packed)); 37 38 // 39 // Handle reading the cpld version from the tmpfs. 40 // cpldVersion(std::span<const uint8_t> data,const HandlerInterface * handler)41 Resp cpldVersion(std::span<const uint8_t> data, const HandlerInterface* handler) 42 { 43 struct CpldRequest request; 44 45 if (data.size() < sizeof(request)) 46 { 47 stdplus::print(stderr, "Invalid command length: {}\n", data.size()); 48 return ::ipmi::responseReqDataLenInvalid(); 49 } 50 51 // data[0] is the CPLD id. "/run/cpld{id}.version" is what we read. 52 // Verified that this cast actually returns the value 255 and not something 53 // negative in the case where data[0] is 0xff. However, it looks weird 54 // since I would expect int(uint8(0xff)) to be -1. So, just cast it 55 // unsigned. we're casting to an int width to avoid it thinking it's a 56 // letter, because it does that. 57 std::memcpy(&request, data.data(), sizeof(request)); 58 59 try 60 { 61 auto values = 62 handler->getCpldVersion(static_cast<unsigned int>(request.id)); 63 64 // Truncate if the version is too high (documented). 65 auto major = std::get<0>(values); 66 auto minor = std::get<1>(values); 67 auto point = std::get<2>(values); 68 auto subpoint = std::get<3>(values); 69 70 return ::ipmi::responseSuccess( 71 SysOEMCommands::SysCpldVersion, 72 std::vector<std::uint8_t>{major, minor, point, subpoint}); 73 } 74 catch (const IpmiException& e) 75 { 76 return ::ipmi::response(e.getIpmiError()); 77 } 78 } 79 80 } // namespace ipmi 81 } // namespace google 82