14d49ae65SPatrick Venture /* 24d49ae65SPatrick Venture * Copyright 2018 Google Inc. 34d49ae65SPatrick Venture * 44d49ae65SPatrick Venture * Licensed under the Apache License, Version 2.0 (the "License"); 54d49ae65SPatrick Venture * you may not use this file except in compliance with the License. 64d49ae65SPatrick Venture * You may obtain a copy of the License at 74d49ae65SPatrick Venture * 84d49ae65SPatrick Venture * http://www.apache.org/licenses/LICENSE-2.0 94d49ae65SPatrick Venture * 104d49ae65SPatrick Venture * Unless required by applicable law or agreed to in writing, software 114d49ae65SPatrick Venture * distributed under the License is distributed on an "AS IS" BASIS, 124d49ae65SPatrick Venture * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 134d49ae65SPatrick Venture * See the License for the specific language governing permissions and 144d49ae65SPatrick Venture * limitations under the License. 154d49ae65SPatrick Venture */ 164d49ae65SPatrick Venture 174d49ae65SPatrick Venture #include "cpld.hpp" 184d49ae65SPatrick Venture 19bb90d4fdSPatrick Venture #include "errors.hpp" 20bb90d4fdSPatrick Venture #include "handler.hpp" 214d49ae65SPatrick Venture #include "main.hpp" 224d49ae65SPatrick Venture 23ce07ee0aSPatrick Venture #include <cstring> 244d49ae65SPatrick Venture 254d49ae65SPatrick Venture namespace google 264d49ae65SPatrick Venture { 274d49ae65SPatrick Venture namespace ipmi 284d49ae65SPatrick Venture { 294d49ae65SPatrick Venture 304d49ae65SPatrick Venture struct CpldRequest 314d49ae65SPatrick Venture { 324d49ae65SPatrick Venture uint8_t subcommand; 334d49ae65SPatrick Venture uint8_t id; 344d49ae65SPatrick Venture } __attribute__((packed)); 354d49ae65SPatrick Venture 364d49ae65SPatrick Venture struct CpldReply 374d49ae65SPatrick Venture { 384d49ae65SPatrick Venture uint8_t subcommand; 394d49ae65SPatrick Venture uint8_t major; 404d49ae65SPatrick Venture uint8_t minor; 414d49ae65SPatrick Venture uint8_t point; 424d49ae65SPatrick Venture uint8_t subpoint; 434d49ae65SPatrick Venture } __attribute__((packed)); 444d49ae65SPatrick Venture 454d49ae65SPatrick Venture // 464d49ae65SPatrick Venture // Handle reading the cpld version from the tmpfs. 474d49ae65SPatrick Venture // 48*45fad1bbSPatrick Venture ipmi_ret_t cpldVersion(const uint8_t* reqBuf, uint8_t* replyBuf, 49bb90d4fdSPatrick Venture size_t* dataLen, const HandlerInterface* handler) 504d49ae65SPatrick Venture { 51acd5423aSPatrick Venture struct CpldRequest request; 52acd5423aSPatrick Venture 53acd5423aSPatrick Venture if ((*dataLen) < sizeof(request)) 544d49ae65SPatrick Venture { 55ce07ee0aSPatrick Venture std::fprintf(stderr, "Invalid command length: %u\n", 560dede335SPatrick Venture static_cast<uint32_t>(*dataLen)); 57fff98617SPatrick Venture return IPMI_CC_REQ_DATA_LEN_INVALID; 584d49ae65SPatrick Venture } 594d49ae65SPatrick Venture 604d49ae65SPatrick Venture // reqBuf[0] is the subcommand. 614d49ae65SPatrick Venture // reqBuf[1] is the CPLD id. "/run/cpld{id}.version" is what we read. 624d49ae65SPatrick Venture // Verified that this cast actually returns the value 255 and not something 634d49ae65SPatrick Venture // negative in the case where reqBuf[1] is 0xff. However, it looks weird 644d49ae65SPatrick Venture // since I would expect int(uint8(0xff)) to be -1. So, just cast it 654d49ae65SPatrick Venture // unsigned. we're casting to an int width to avoid it thinking it's a 664d49ae65SPatrick Venture // letter, because it does that. 67acd5423aSPatrick Venture std::memcpy(&request, &reqBuf[0], sizeof(request)); 684d49ae65SPatrick Venture 694d49ae65SPatrick Venture try 704d49ae65SPatrick Venture { 71bb90d4fdSPatrick Venture auto values = 72bb90d4fdSPatrick Venture handler->getCpldVersion(static_cast<unsigned int>(request.id)); 734d49ae65SPatrick Venture 744d49ae65SPatrick Venture // Truncate if the version is too high (documented). 754d49ae65SPatrick Venture struct CpldReply reply; 764d49ae65SPatrick Venture reply.subcommand = SysCpldVersion; 77bb90d4fdSPatrick Venture reply.major = std::get<0>(values); 78bb90d4fdSPatrick Venture reply.minor = std::get<1>(values); 79bb90d4fdSPatrick Venture reply.point = std::get<2>(values); 80bb90d4fdSPatrick Venture reply.subpoint = std::get<3>(values); 814d49ae65SPatrick Venture 82acd5423aSPatrick Venture std::memcpy(&replyBuf[0], &reply, sizeof(reply)); 83acd5423aSPatrick Venture (*dataLen) = sizeof(reply); 844d49ae65SPatrick Venture return IPMI_CC_OK; 854d49ae65SPatrick Venture } 86bb90d4fdSPatrick Venture catch (const IpmiException& e) 87bb90d4fdSPatrick Venture { 88bb90d4fdSPatrick Venture return e.getIpmiError(); 89bb90d4fdSPatrick Venture } 90bb90d4fdSPatrick Venture } 914d49ae65SPatrick Venture 924d49ae65SPatrick Venture } // namespace ipmi 934d49ae65SPatrick Venture } // namespace google 94