From 0acf057f9ed774ca7c354fc5735d53c6f53a8cef Mon Sep 17 00:00:00 2001
From: Marri Devender Rao <devenrao@in.ibm.com>
Date: Mon, 3 Jul 2017 12:25:47 -0500
Subject: read data for the specified FRU id from inventory

Change-Id: I5255541719edad6453cd3163d9ad428548f1a2c7
Signed-off-by: Marri Devender Rao <devenrao@in.ibm.com>
---
 read_fru_data.cpp | 118 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 read_fru_data.cpp

(limited to 'read_fru_data.cpp')

diff --git a/read_fru_data.cpp b/read_fru_data.cpp
new file mode 100644
index 0000000..5388926
--- /dev/null
+++ b/read_fru_data.cpp
@@ -0,0 +1,118 @@
+#include <map>
+#include <phosphor-logging/elog-errors.hpp>
+#include "xyz/openbmc_project/Common/error.hpp"
+#include "read_fru_data.hpp"
+#include "fruread.hpp"
+#include "host-ipmid/ipmid-api.h"
+#include "utils.hpp"
+
+extern const FruMap frus;
+
+namespace ipmi
+{
+namespace fru
+{
+using namespace phosphor::logging;
+using InternalFailure =
+        sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;
+
+static constexpr auto INV_INTF  = "xyz.openbmc_project.Inventory.Manager";
+static constexpr auto OBJ_PATH  = "/xyz/openbmc_project/inventory";
+static constexpr auto PROP_INTF = "org.freedesktop.DBus.Properties";
+
+namespace cache
+{
+    //User initiate read FRU info area command followed by
+    //FRU read command. Also data is read in small chunks of
+    //the specified offset and count.
+    //Caching the data which will be invalidated when ever there
+    //is a change in FRU properties.
+    FRUAreaMap fruMap;
+}
+/**
+ * @brief Read the property value from Inventory
+ *
+ * @param[in] bus dbus
+ * @param[in] intf Interface
+ * @param[in] propertyName Name of the property
+ * @param[in] path Object path
+ * @return property value
+ */
+std::string readProperty(const std::string& intf,
+                         const std::string& propertyName,
+                         const std::string& path)
+{
+    sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
+    auto service = ipmi::getService(bus, INV_INTF, OBJ_PATH);
+    std::string objPath = OBJ_PATH + path;
+    auto method = bus.new_method_call(service.c_str(),
+                                      objPath.c_str(),
+                                      PROP_INTF,
+                                      "Get");
+    method.append(intf, propertyName);
+    auto reply = bus.call(method);
+    if (reply.is_method_error())
+    {
+        //If property is not found simply return empty value
+        log<level::INFO>("Property value not set",
+            entry("Property=%s", propertyName),
+            entry("Path=%s", objPath));
+        return {};
+    }
+    sdbusplus::message::variant<std::string> property;
+    reply.read(property);
+    std::string value =
+        sdbusplus::message::variant_ns::get<std::string>(property);
+    return value;
+}
+
+/**
+ * @brief Read FRU property values from Inventory
+ *
+ * @param[in] fruNum  FRU id
+ * @return populate FRU Inventory data
+ */
+FruInventoryData readDataFromInventory(const FRUId& fruNum)
+{
+    auto iter = frus.find(fruNum);
+    if (iter == frus.end())
+    {
+        log<level::ERR>("Unsupported FRU ID ",entry("FRUID=%d", fruNum));
+        elog<InternalFailure>();
+    }
+
+    FruInventoryData data;
+    auto& instanceList = iter->second;
+    for (auto& instance : instanceList)
+    {
+        for (auto& interfaceList : instance.second)
+        {
+            for (auto& properties : interfaceList.second)
+            {
+                decltype(auto) pdata = properties.second;
+                auto value = readProperty(
+                        interfaceList.first, properties.first,
+                        instance.first);
+                data[pdata.section].emplace(properties.first, value);
+            }
+        }
+    }
+    return data;
+}
+
+const FruAreaData& getFruAreaData(const FRUId& fruNum)
+{
+    auto iter = cache::fruMap.find(fruNum);
+    if (iter != cache::fruMap.end())
+    {
+        return iter->second;
+    }
+    auto invData = readDataFromInventory(fruNum);
+
+    //Build area info based on inventory data
+    FruAreaData newdata = buildFruAreaData(std::move(invData));
+    cache::fruMap.emplace(fruNum, std::move(newdata));
+    return cache::fruMap.at(fruNum);
+}
+} //fru
+} //ipmi
-- 
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