Register callbacks for pcap property changes

Change-Id: I39b38a931ffdf260d9ee45f02cdd31e9e884b04d
Signed-off-by: Andrew Geissler <andrewg@us.ibm.com>

1 files changed, 78 insertions, 0 deletions

diff --git a/powercap.hpp b/powercap.hpp
new file mode 100644
index 0000000..878822b
--- /dev/null
+++ b/powercap.hpp
@@ -0,0 +1,78 @@
+#pragma once
+
+#include <sdbusplus/bus.hpp>
+#include <sdbusplus/bus/match.hpp>
+#include "occ_status.hpp"
+#include "config.h"
+
+namespace open_power
+{
+namespace occ
+{
+namespace powercap
+{
+
+namespace sdbusRule = sdbusplus::bus::match::rules;
+
+/** @class PowerCap
+ *  @brief Monitors for changes to the power cap and notifies occ
+ *
+ *  The customer power cap is provided to the OCC by host TMGT when the occ
+ *  first goes active or is reset.  This code is responsible for sending
+ *  the power cap to the OCC if the cap is changed while the occ is active.
+ */
+
+class PowerCap
+{
+public:
+    /** @brief PowerCap object to inform occ of changes to cap
+     *
+     * This object will monitor for changes to the power cap setting and
+     * power cap enable properties.  If a change is detected, and the occ
+     * is active, then this object will notify the OCC of the change.
+     *
+     * @param[in] bus       - The Dbus bus object
+     * @param[in] occStatus - The occ status object
+     */
+    PowerCap(sdbusplus::bus::bus &bus,
+             Status &occStatus) :
+        bus(bus),
+        occStatus(occStatus),
+        pcapMatch(
+                bus,
+                sdbusRule::member("PropertiesChanged") +
+                sdbusRule::path(
+                    "/xyz/openbmc_project/control/host0/power_cap") +
+                sdbusRule::argN(0, "xyz.openbmc_project.Control.Power.Cap") +
+                sdbusRule::interface("org.freedesktop.DBus.Properties"),
+                std::bind(std::mem_fn(&PowerCap::pcapChanged),
+                          this, std::placeholders::_1))
+    {};
+
+private:
+
+    /** @brief Callback for pcap setting changes
+     *
+     * Process change and inform OCC
+     *
+     * @param[in]  msg       - Data associated with pcap change signal
+     *
+     */
+    void pcapChanged(sdbusplus::message::message& msg);
+
+    /** @brief Reference to sdbus **/
+    sdbusplus::bus::bus& bus;
+
+    /* @brief OCC Status object */
+    Status &occStatus;
+
+    /** @brief Used to subscribe to dbus pcap propety changes **/
+    sdbusplus::bus::match_t pcapMatch;
+
+ };
+
+} // namespace open_power
+
+} // namespace occ
+
+}// namespace powercap