diff --git a/pcie_i2c.hpp b/pcie_i2c.hpp
new file mode 100644
index 0000000..6150226
--- /dev/null
+++ b/pcie_i2c.hpp
@@ -0,0 +1,21 @@
+#pragma once
+
+#include <host-ipmid/ipmid-api.h>
+
+namespace google
+{
+namespace ipmi
+{
+
+//  Handle the pcie slot count command.
+//  Sys can query the number of pcie slots.
+ipmi_ret_t PcieSlotCount(const uint8_t* reqBuf, uint8_t* replyBuf,
+                         size_t* dataLen);
+
+// Handle the pcie slot to i2c bus mapping command.
+// Sys can query which i2c bus is routed to which pcie slot.
+ipmi_ret_t PcieSlotI2cBusMapping(const uint8_t* reqBuf, uint8_t* replyBuf,
+                                 size_t* dataLen);
+
+} // namespace ipmi
+} // namespace google