1*a2056e9cSWilly Tu // Copyright 2021 Google LLC 2*a2056e9cSWilly Tu // 3*a2056e9cSWilly Tu // Licensed under the Apache License, Version 2.0 (the "License"); 4*a2056e9cSWilly Tu // you may not use this file except in compliance with the License. 5*a2056e9cSWilly Tu // You may obtain a copy of the License at 6*a2056e9cSWilly Tu // 7*a2056e9cSWilly Tu // http://www.apache.org/licenses/LICENSE-2.0 8*a2056e9cSWilly Tu // 9*a2056e9cSWilly Tu // Unless required by applicable law or agreed to in writing, software 10*a2056e9cSWilly Tu // distributed under the License is distributed on an "AS IS" BASIS, 11*a2056e9cSWilly Tu // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12*a2056e9cSWilly Tu // See the License for the specific language governing permissions and 13*a2056e9cSWilly Tu // limitations under the License. 144d49ae65SPatrick Venture 154d49ae65SPatrick Venture #include "cpld.hpp" 164d49ae65SPatrick Venture 170e9aae5dSPatrick Venture #include "commands.hpp" 18bb90d4fdSPatrick Venture #include "errors.hpp" 19bb90d4fdSPatrick Venture #include "handler.hpp" 204d49ae65SPatrick Venture 21ce07ee0aSPatrick Venture #include <cstring> 224d49ae65SPatrick Venture 234d49ae65SPatrick Venture namespace google 244d49ae65SPatrick Venture { 254d49ae65SPatrick Venture namespace ipmi 264d49ae65SPatrick Venture { 274d49ae65SPatrick Venture 284d49ae65SPatrick Venture struct CpldRequest 294d49ae65SPatrick Venture { 304d49ae65SPatrick Venture uint8_t subcommand; 314d49ae65SPatrick Venture uint8_t id; 324d49ae65SPatrick Venture } __attribute__((packed)); 334d49ae65SPatrick Venture 344d49ae65SPatrick Venture struct CpldReply 354d49ae65SPatrick Venture { 364d49ae65SPatrick Venture uint8_t subcommand; 374d49ae65SPatrick Venture uint8_t major; 384d49ae65SPatrick Venture uint8_t minor; 394d49ae65SPatrick Venture uint8_t point; 404d49ae65SPatrick Venture uint8_t subpoint; 414d49ae65SPatrick Venture } __attribute__((packed)); 424d49ae65SPatrick Venture 434d49ae65SPatrick Venture // 444d49ae65SPatrick Venture // Handle reading the cpld version from the tmpfs. 454d49ae65SPatrick Venture // 4645fad1bbSPatrick Venture ipmi_ret_t cpldVersion(const uint8_t* reqBuf, uint8_t* replyBuf, 47bb90d4fdSPatrick Venture size_t* dataLen, const HandlerInterface* handler) 484d49ae65SPatrick Venture { 49acd5423aSPatrick Venture struct CpldRequest request; 50acd5423aSPatrick Venture 51acd5423aSPatrick Venture if ((*dataLen) < sizeof(request)) 524d49ae65SPatrick Venture { 53ce07ee0aSPatrick Venture std::fprintf(stderr, "Invalid command length: %u\n", 540dede335SPatrick Venture static_cast<uint32_t>(*dataLen)); 55fff98617SPatrick Venture return IPMI_CC_REQ_DATA_LEN_INVALID; 564d49ae65SPatrick Venture } 574d49ae65SPatrick Venture 584d49ae65SPatrick Venture // reqBuf[0] is the subcommand. 594d49ae65SPatrick Venture // reqBuf[1] is the CPLD id. "/run/cpld{id}.version" is what we read. 604d49ae65SPatrick Venture // Verified that this cast actually returns the value 255 and not something 614d49ae65SPatrick Venture // negative in the case where reqBuf[1] is 0xff. However, it looks weird 624d49ae65SPatrick Venture // since I would expect int(uint8(0xff)) to be -1. So, just cast it 634d49ae65SPatrick Venture // unsigned. we're casting to an int width to avoid it thinking it's a 644d49ae65SPatrick Venture // letter, because it does that. 65acd5423aSPatrick Venture std::memcpy(&request, &reqBuf[0], sizeof(request)); 664d49ae65SPatrick Venture 674d49ae65SPatrick Venture try 684d49ae65SPatrick Venture { 69bb90d4fdSPatrick Venture auto values = 70bb90d4fdSPatrick Venture handler->getCpldVersion(static_cast<unsigned int>(request.id)); 714d49ae65SPatrick Venture 724d49ae65SPatrick Venture // Truncate if the version is too high (documented). 734d49ae65SPatrick Venture struct CpldReply reply; 744d49ae65SPatrick Venture reply.subcommand = SysCpldVersion; 75bb90d4fdSPatrick Venture reply.major = std::get<0>(values); 76bb90d4fdSPatrick Venture reply.minor = std::get<1>(values); 77bb90d4fdSPatrick Venture reply.point = std::get<2>(values); 78bb90d4fdSPatrick Venture reply.subpoint = std::get<3>(values); 794d49ae65SPatrick Venture 80acd5423aSPatrick Venture std::memcpy(&replyBuf[0], &reply, sizeof(reply)); 81acd5423aSPatrick Venture (*dataLen) = sizeof(reply); 824d49ae65SPatrick Venture return IPMI_CC_OK; 834d49ae65SPatrick Venture } 84bb90d4fdSPatrick Venture catch (const IpmiException& e) 85bb90d4fdSPatrick Venture { 86bb90d4fdSPatrick Venture return e.getIpmiError(); 87bb90d4fdSPatrick Venture } 88bb90d4fdSPatrick Venture } 894d49ae65SPatrick Venture 904d49ae65SPatrick Venture } // namespace ipmi 914d49ae65SPatrick Venture } // namespace google 92