Implement get payload instance info command

Resolves openbmc/openbmc#2892

Change-Id: Id5f95df64bcdc97646f11d6d3630eead062c4193
Signed-off-by: Tom Joseph <tomjoseph@in.ibm.com>
diff --git a/command/payload_cmds.hpp b/command/payload_cmds.hpp
index 6901256..d751a95 100644
--- a/command/payload_cmds.hpp
+++ b/command/payload_cmds.hpp
@@ -251,6 +251,41 @@
 std::vector<uint8_t> getPayloadStatus(const std::vector<uint8_t>& inPayload,
                                       const message::Handler& handler);
 
+/** @struct GetPayloadInfoRequest
+ *
+ *  IPMI payload for Get Payload Instance info command request.
+ */
+struct GetPayloadInfoRequest
+{
+    uint8_t payloadType;    //!< Payload type
+    uint8_t payloadInstance;//!< Payload instance
+} __attribute__((packed));
+
+/** @struct GetPayloadInfoResponse
+ *
+ *  IPMI payload for Get Payload Instance info command response.
+ */
+struct GetPayloadInfoResponse
+{
+    uint8_t completionCode; //!< Completion code.
+    uint32_t sessionID;     //!< Session ID
+    uint8_t portNumber;     //!< Port number
+    uint8_t reserved[7];    //!< Reserved
+} __attribute__((packed));
+
+/** @brief Get Payload Instance Info Command.
+ *
+ *  This command returns information about a specific instance of a payload
+ *  type. Session ID is returned by this command
+ *
+ *  @param[in] inPayload - Request Data for the command.
+ *  @param[in] handler - Reference to the Message Handler.
+ *
+ *  @return Response data for the command
+ */
+std::vector<uint8_t> getPayloadInfo(const std::vector<uint8_t>& inPayload,
+                                    const message::Handler& handler);
+
 } // namespace command
 
 } // namespace sol