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 "pcie_i2c.hpp" 16 17 #include "commands.hpp" 18 #include "handler.hpp" 19 20 #include <cstdint> 21 #include <cstring> 22 #include <ipmid/api-types.hpp> 23 #include <span> 24 #include <string> 25 #include <tuple> 26 #include <vector> 27 28 namespace google 29 { 30 namespace ipmi 31 { 32 33 #ifndef MAX_IPMI_BUFFER 34 #define MAX_IPMI_BUFFER 64 35 #endif 36 37 struct PcieSlotI2cBusMappingRequest 38 { 39 uint8_t entry; 40 } __attribute__((packed)); 41 42 Resp pcieSlotCount(std::span<const uint8_t>, HandlerInterface* handler) 43 { 44 // If there are already entries in the vector, clear them. 45 handler->buildI2cPcieMapping(); 46 47 // Fill the pcie slot count as the number of entries in the vector. 48 std::uint8_t value = handler->getI2cPcieMappingSize(); 49 50 return ::ipmi::responseSuccess(SysOEMCommands::SysPcieSlotCount, 51 std::vector<std::uint8_t>{value}); 52 } 53 54 Resp pcieSlotI2cBusMapping(std::span<const uint8_t> data, 55 HandlerInterface* handler) 56 { 57 struct PcieSlotI2cBusMappingRequest request; 58 59 if (data.size() < sizeof(request)) 60 { 61 std::fprintf(stderr, "Invalid command length: %u\n", 62 static_cast<uint32_t>(data.size())); 63 return ::ipmi::responseReqDataLenInvalid(); 64 } 65 66 // If there are no entries in the vector return error. 67 size_t mapSize = handler->getI2cPcieMappingSize(); 68 if (mapSize == 0) 69 { 70 return ::ipmi::responseInvalidReservationId(); 71 } 72 73 std::memcpy(&request, data.data(), sizeof(request)); 74 75 // The valid entries range from 0 to N - 1, N being the total number of 76 // entries in the vector. 77 if (request.entry >= mapSize) 78 { 79 return ::ipmi::responseParmOutOfRange(); 80 } 81 82 // Get the i2c bus number and the pcie slot name from the vector. 83 auto i2cEntry = handler->getI2cEntry(request.entry); 84 uint32_t i2c_bus_number = std::get<0>(i2cEntry); 85 std::string pcie_slot_name = std::get<1>(i2cEntry); 86 87 int length = 88 sizeof(struct PcieSlotI2cBusMappingReply) + pcie_slot_name.length(); 89 90 // TODO (jaghu) : Add a way to dynamically receive the MAX_IPMI_BUFFER 91 // value and change error to IPMI_CC_REQUESTED_TOO_MANY_BYTES. 92 if (length > MAX_IPMI_BUFFER) 93 { 94 std::fprintf(stderr, "Response would overflow response buffer\n"); 95 return ::ipmi::responseInvalidCommand(); 96 } 97 98 std::vector<std::uint8_t> reply; 99 reply.reserve(pcie_slot_name.length() + 100 sizeof(struct PcieSlotI2cBusMappingReply)); 101 // Copy the i2c bus number and the pcie slot name to the reply struct. 102 reply.emplace_back(i2c_bus_number); /* i2c_bus_number */ 103 reply.emplace_back(pcie_slot_name.length()); /* pcie_slot_name length */ 104 reply.insert(reply.end(), pcie_slot_name.begin(), 105 pcie_slot_name.end()); /* pcie_slot_name */ 106 107 return ::ipmi::responseSuccess(SysOEMCommands::SysPcieSlotI2cBusMapping, 108 reply); 109 } 110 } // namespace ipmi 111 } // namespace google 112