1 files changed, 76 insertions, 0 deletions
diff --git a/redfish-core/include/utils/pcie_util.hpp b/redfish-core/include/utils/pcie_util.hpp
new file mode 100644
index 0000000000..51423b435f
--- /dev/null
+++ b/redfish-core/include/utils/pcie_util.hpp
@@ -0,0 +1,76 @@
+#pragma once
+
+#include "async_resp.hpp"
+#include "dbus_utility.hpp"
+#include "error_messages.hpp"
+#include "http/utility.hpp"
+
+#include <boost/system/error_code.hpp>
+#include <boost/url/format.hpp>
+#include <nlohmann/json.hpp>
+
+#include <array>
+#include <memory>
+#include <string>
+#include <string_view>
+
+namespace redfish
+{
+namespace pcie_util
+{
+
+/**
+ * @brief Populate the PCIe Device list from a GetSubTreePaths search of
+ *        inventory
+ *
+ * @param[i,o] aResp  Async response object
+ * @param[i]   Name   Key to store the list of PCIe devices in aResp
+ *
+ * @return void
+ */
+
+inline void
+    getPCIeDeviceList(const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
+                      const std::string& name)
+{
+    static constexpr std::array<std::string_view, 1> pcieDeviceInterface = {
+        "xyz.openbmc_project.Inventory.Item.PCIeDevice"};
+
+    dbus::utility::getSubTreePaths(
+        "/xyz/openbmc_project/inventory", 0, pcieDeviceInterface,
+        [asyncResp, name](const boost::system::error_code& ec,
+                          const dbus::utility::MapperGetSubTreePathsResponse&
+                              pcieDevicePaths) {
+        if (ec)
+        {
+            BMCWEB_LOG_DEBUG << "no PCIe device paths found ec: "
+                             << ec.message();
+            // Not an error, system just doesn't have PCIe info
+            return;
+        }
+        nlohmann::json& pcieDeviceList = asyncResp->res.jsonValue[name];
+        pcieDeviceList = nlohmann::json::array();
+        for (const std::string& pcieDevicePath : pcieDevicePaths)
+        {
+            size_t devStart = pcieDevicePath.rfind('/');
+            if (devStart == std::string::npos)
+            {
+                continue;
+            }
+
+            std::string devName = pcieDevicePath.substr(devStart + 1);
+            if (devName.empty())
+            {
+                continue;
+            }
+            nlohmann::json::object_t pcieDevice;
+            pcieDevice["@odata.id"] = boost::urls::format(
+                "/redfish/v1/Systems/system/PCIeDevices/{}", devName);
+            pcieDeviceList.emplace_back(std::move(pcieDevice));
+        }
+        asyncResp->res.jsonValue[name + "@odata.count"] = pcieDeviceList.size();
+        });
+}
+
+} // namespace pcie_util
+} // namespace redfish