blob: dabb401dd381c65b72d4e65400ca753a8ad573c2 [file] [log] [blame]
#include "config.h"
#include "host_pdr_handler.hpp"
#include <assert.h>
#include <fstream>
#include <nlohmann/json.hpp>
#include "libpldm/requester/pldm.h"
namespace pldm
{
using namespace pldm::utils;
using namespace sdbusplus::bus::match::rules;
using Json = nlohmann::json;
namespace fs = std::filesystem;
constexpr auto fruJson = "host_frus.json";
const Json emptyJson{};
const std::vector<Json> emptyJsonList{};
HostPDRHandler::HostPDRHandler(int mctp_fd, uint8_t mctp_eid,
sdeventplus::Event& event, pldm_pdr* repo,
pldm_entity_association_tree* entityTree,
Requester& requester) :
mctp_fd(mctp_fd),
mctp_eid(mctp_eid), event(event), repo(repo), entityTree(entityTree),
requester(requester)
{
fs::path hostFruJson(fs::path(HOST_JSONS_DIR) / fruJson);
if (fs::exists(hostFruJson))
{
// Note parent entities for entities sent down by the host firmware.
// This will enable a merge of entity associations.
try
{
std::ifstream jsonFile(hostFruJson);
auto data = Json::parse(jsonFile, nullptr, false);
if (data.is_discarded())
{
std::cerr << "Parsing Host FRU json file failed" << std::endl;
}
else
{
auto entities = data.value("entities", emptyJsonList);
for (auto& entity : entities)
{
EntityType entityType = entity.value("entity_type", 0);
auto parent = entity.value("parent", emptyJson);
pldm_entity p{};
p.entity_type = parent.value("entity_type", 0);
p.entity_instance_num = parent.value("entity_instance", 0);
parents.emplace(entityType, std::move(p));
}
}
}
catch (const std::exception& e)
{
std::cerr << "Parsing Host FRU json file failed, exception = "
<< e.what() << std::endl;
}
}
hostOffMatch = std::make_unique<sdbusplus::bus::match::match>(
pldm::utils::DBusHandler::getBus(),
propertiesChanged("/xyz/openbmc_project/state/host0",
"xyz.openbmc_project.State.Host"),
[repo](sdbusplus::message::message& msg) {
DbusChangedProps props{};
std::string intf;
msg.read(intf, props);
const auto itr = props.find("CurrentHostState");
if (itr != props.end())
{
PropertyValue value = itr->second;
auto propVal = std::get<std::string>(value);
if (propVal == "xyz.openbmc_project.State.Host.HostState.Off")
{
pldm_pdr_remove_remote_pdrs(repo);
}
}
});
}
void HostPDRHandler::fetchPDR(std::vector<uint32_t>&& recordHandles)
{
pdrRecordHandles.clear();
pdrRecordHandles = std::move(recordHandles);
// Defer the actual fetch of PDRs from the host (by queuing the call on the
// main event loop). That way, we can respond to the platform event msg from
// the host firmware.
pdrFetchEvent = std::make_unique<sdeventplus::source::Defer>(
event, std::bind(std::mem_fn(&HostPDRHandler::_fetchPDR), this,
std::placeholders::_1));
}
void HostPDRHandler::_fetchPDR(sdeventplus::source::EventBase& /*source*/)
{
pdrFetchEvent.reset();
std::vector<uint8_t> requestMsg(sizeof(pldm_msg_hdr) +
PLDM_GET_PDR_REQ_BYTES);
auto request = reinterpret_cast<pldm_msg*>(requestMsg.data());
bool merged = false;
for (auto recordHandle : pdrRecordHandles)
{
auto instanceId = requester.getInstanceId(mctp_eid);
auto rc =
encode_get_pdr_req(instanceId, recordHandle, 0, PLDM_GET_FIRSTPART,
UINT16_MAX, 0, request, PLDM_GET_PDR_REQ_BYTES);
if (rc != PLDM_SUCCESS)
{
requester.markFree(mctp_eid, instanceId);
std::cerr << "Failed to encode_get_pdr_req, rc = " << rc
<< std::endl;
return;
}
uint8_t* responseMsg = nullptr;
size_t responseMsgSize{};
auto requesterRc =
pldm_send_recv(mctp_eid, mctp_fd, requestMsg.data(),
requestMsg.size(), &responseMsg, &responseMsgSize);
std::unique_ptr<uint8_t, decltype(std::free)*> responseMsgPtr{
responseMsg, std::free};
requester.markFree(mctp_eid, instanceId);
if (requesterRc != PLDM_REQUESTER_SUCCESS)
{
std::cerr << "Failed to send msg to fetch pdrs, rc = "
<< requesterRc << std::endl;
return;
}
uint8_t completionCode{};
uint32_t nextRecordHandle{};
uint32_t nextDataTransferHandle{};
uint8_t transferFlag{};
uint16_t respCount{};
uint8_t transferCRC{};
auto responsePtr =
reinterpret_cast<struct pldm_msg*>(responseMsgPtr.get());
rc = decode_get_pdr_resp(
responsePtr, responseMsgSize - sizeof(pldm_msg_hdr),
&completionCode, &nextRecordHandle, &nextDataTransferHandle,
&transferFlag, &respCount, nullptr, 0, &transferCRC);
if (rc != PLDM_SUCCESS)
{
std::cerr << "Failed to decode_get_pdr_resp, rc = " << rc
<< std::endl;
}
else
{
std::vector<uint8_t> pdr(respCount, 0);
rc = decode_get_pdr_resp(
responsePtr, responseMsgSize - sizeof(pldm_msg_hdr),
&completionCode, &nextRecordHandle, &nextDataTransferHandle,
&transferFlag, &respCount, pdr.data(), respCount, &transferCRC);
if (rc != PLDM_SUCCESS || completionCode != PLDM_SUCCESS)
{
std::cerr << "Failed to decode_get_pdr_resp: "
<< "rc=" << rc
<< ", cc=" << static_cast<unsigned>(completionCode)
<< std::endl;
}
else
{
// Process the PDR host firmware sent us. The most common action
// is to add the PDR to the the BMC's PDR repo.
auto pdrHdr = reinterpret_cast<pldm_pdr_hdr*>(pdr.data());
if (pdrHdr->type == PLDM_PDR_ENTITY_ASSOCIATION)
{
mergeEntityAssociations(pdr);
merged = true;
}
else
{
pldm_pdr_add(repo, pdr.data(), respCount, 0, true);
}
}
}
}
if (merged)
{
// We have merged host's entity association PDRs with our own. Send an
// event to the host firmware to indicate the same.
sendPDRRepositoryChgEvent(
std::move(std::vector<uint8_t>(1, PLDM_PDR_ENTITY_ASSOCIATION)),
FORMAT_IS_PDR_HANDLES);
}
}
bool HostPDRHandler::getParent(EntityType type, pldm_entity& parent)
{
auto found = parents.find(type);
if (found != parents.end())
{
parent.entity_type = found->second.entity_type;
parent.entity_instance_num = found->second.entity_instance_num;
return true;
}
return false;
}
void HostPDRHandler::mergeEntityAssociations(const std::vector<uint8_t>& pdr)
{
size_t numEntities{};
pldm_entity* entities = nullptr;
bool merged = false;
auto entityPdr = reinterpret_cast<pldm_pdr_entity_association*>(
const_cast<uint8_t*>(pdr.data()) + sizeof(pldm_pdr_hdr));
pldm_entity_association_pdr_extract(pdr.data(), pdr.size(), &numEntities,
&entities);
for (size_t i = 0; i < numEntities; ++i)
{
pldm_entity parent{};
if (getParent(entities[i].entity_type, parent))
{
auto node = pldm_entity_association_tree_find(entityTree, &parent);
if (node)
{
pldm_entity_association_tree_add(entityTree, &entities[i], node,
entityPdr->association_type);
merged = true;
}
}
}
free(entities);
if (merged)
{
// Update our PDR repo with the merged entity association PDRs
pldm_entity_association_pdr_add(entityTree, repo, true);
}
}
void HostPDRHandler::sendPDRRepositoryChgEvent(std::vector<uint8_t>&& pdrTypes,
uint8_t eventDataFormat)
{
assert(eventDataFormat == FORMAT_IS_PDR_HANDLES);
// Extract from the PDR repo record handles of PDRs we want the host
// to pull up.
std::vector<uint8_t> eventDataOps{PLDM_RECORDS_ADDED};
std::vector<uint8_t> numsOfChangeEntries(1);
std::vector<std::vector<ChangeEntry>> changeEntries(
numsOfChangeEntries.size());
for (auto pdrType : pdrTypes)
{
const pldm_pdr_record* record{};
do
{
record = pldm_pdr_find_record_by_type(repo, pdrType, record,
nullptr, nullptr);
if (record && pldm_pdr_record_is_remote(record))
{
changeEntries[0].push_back(
pldm_pdr_get_record_handle(repo, record));
}
} while (record);
}
if (changeEntries.empty())
{
return;
}
numsOfChangeEntries[0] = changeEntries[0].size();
// Encode PLDM platform event msg to indicate a PDR repo change.
size_t maxSize = PLDM_PDR_REPOSITORY_CHG_EVENT_MIN_LENGTH +
PLDM_PDR_REPOSITORY_CHANGE_RECORD_MIN_LENGTH +
changeEntries[0].size() * sizeof(uint32_t);
std::vector<uint8_t> eventDataVec{};
eventDataVec.resize(maxSize);
auto eventData =
reinterpret_cast<struct pldm_pdr_repository_chg_event_data*>(
eventDataVec.data());
size_t actualSize{};
auto firstEntry = changeEntries[0].data();
auto rc = encode_pldm_pdr_repository_chg_event_data(
eventDataFormat, 1, eventDataOps.data(), numsOfChangeEntries.data(),
&firstEntry, eventData, &actualSize, maxSize);
if (rc != PLDM_SUCCESS)
{
std::cerr
<< "Failed to encode_pldm_pdr_repository_chg_event_data, rc = "
<< rc << std::endl;
return;
}
auto instanceId = requester.getInstanceId(mctp_eid);
std::vector<uint8_t> requestMsg(sizeof(pldm_msg_hdr) +
PLDM_PLATFORM_EVENT_MESSAGE_MIN_REQ_BYTES +
actualSize);
auto request = reinterpret_cast<pldm_msg*>(requestMsg.data());
rc = encode_platform_event_message_req(
instanceId, 1, 0, PLDM_PDR_REPOSITORY_CHG_EVENT, eventDataVec.data(),
actualSize, request,
actualSize + PLDM_PLATFORM_EVENT_MESSAGE_MIN_REQ_BYTES);
if (rc != PLDM_SUCCESS)
{
requester.markFree(mctp_eid, instanceId);
std::cerr << "Failed to encode_platform_event_message_req, rc = " << rc
<< std::endl;
return;
}
// Send up the event to host.
uint8_t* responseMsg = nullptr;
size_t responseMsgSize{};
auto requesterRc =
pldm_send_recv(mctp_eid, mctp_fd, requestMsg.data(), requestMsg.size(),
&responseMsg, &responseMsgSize);
requester.markFree(mctp_eid, instanceId);
if (requesterRc != PLDM_REQUESTER_SUCCESS)
{
std::cerr << "Failed to send msg to report pdrs, rc = " << requesterRc
<< std::endl;
return;
}
uint8_t completionCode{};
uint8_t status{};
auto responsePtr = reinterpret_cast<struct pldm_msg*>(responseMsg);
rc = decode_platform_event_message_resp(
responsePtr, responseMsgSize - sizeof(pldm_msg_hdr), &completionCode,
&status);
free(responseMsg);
if (rc != PLDM_SUCCESS || completionCode != PLDM_SUCCESS)
{
std::cerr << "Failed to decode_platform_event_message_resp: "
<< "rc=" << rc
<< ", cc=" << static_cast<unsigned>(completionCode)
<< std::endl;
}
}
} // namespace pldm