mpmd: Add support to delay and trigger fpga/dts load after update

Add a new image_loader argument delay_reload to provide a way to update
components but optionally delay the actual load.
Similarly add a new argument, just_reload, to enable uhd to reload
the fpga/dts components.

Signed-off-by: Virendra Kakade <virendra.kakade@ni.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/host/lib/usrp/mpmd/mpmd_prop_tree.cpp b/host/lib/usrp/mpmd/mpmd_prop_tree.cpp
index 556e2e48d..2bd955194 100644
--- a/host/lib/usrp/mpmd/mpmd_prop_tree.cpp
+++ b/host/lib/usrp/mpmd/mpmd_prop_tree.cpp
@@ -13,6 +13,8 @@
 #include <uhd/types/eeprom.hpp>
 #include <uhd/types/sensors.hpp>
 #include <uhd/usrp/mboard_eeprom.hpp>
+#include <uhd/utils/cast.hpp>
+#include <boost/algorithm/string/case_conv.hpp>
 
 using namespace uhd;
 using namespace uhd::mpmd;
@@ -34,6 +36,7 @@ uhd::usrp::component_files_t _update_component(
     // Also construct a copy of just the metadata to store in the property tree
     uhd::usrp::component_files_t all_comps_copy;
 
+    bool just_reload = false;
     for (const auto& comp : comps) {
         // Make a map for update components args
         std::map<std::string, std::string> metadata;
@@ -43,6 +46,12 @@ uhd::usrp::component_files_t _update_component(
         for (const auto& key : comp.metadata.keys()) {
             metadata[key]           = comp.metadata[key];
             comp_copy.metadata[key] = comp.metadata[key];
+            if (key == "just_reload") {
+                just_reload =
+                    just_reload
+                    | uhd::cast::from_str<bool>(metadata.at("just_reload"));
+                    //| (boost::to_lower_copy(metadata.at("just_reload")) == "true");
+            }
         }
         // Copy to the update component args
         all_data.push_back(comp.data);
@@ -51,6 +60,15 @@ uhd::usrp::component_files_t _update_component(
         all_comps_copy.push_back(comp_copy);
     }
 
+    // If reset is specified we presume that the fpga/dts
+    // components were updated in the last uhd::image_loader::load()
+    // call and just reload the fpga/dts by resetting the peripheral
+    // manager.
+    if (just_reload) {
+        mb->rpc->notify_with_token(MPMD_DEFAULT_INIT_TIMEOUT, "reset_timer_and_mgr");
+        return all_comps_copy;
+    }
+
     // Now call update component
     mb->rpc->notify_with_token(
         MPMD_DEFAULT_INIT_TIMEOUT, "update_component", all_metadata, all_data);