rfnoc: Add MTU tracking

MTUs are now tracked through the framework for all childs of
noc_block_base. Every edge gets an 'mtu' property. MTU can be set and
get either through the prop API, or through new API calls (get_mtu(),
set_mtu()). It is also possible to create custom properties that depend
on the MTU by asking for a reference to the MTU property, and then
adding that to the input list of a property resolver.

The radio_control_impl includes a change in this commit where it sets
the spp based on the MTU.

Blocks can also set an MTU forwarding policy. The DDC block includes a
change in this commit that sets a forwarding policy of ONE_TO_ONE,
meaning that the MTU on an input edge is forwarded to the corresponding
output edge (but not the other edges, as with the tick rate).

1 files changed, 1 insertions, 0 deletions

diff --git a/host/lib/rfnoc/ddc_block_control.cpp b/host/lib/rfnoc/ddc_block_control.cpp
index 0c2721833..37286b29d 100644
--- a/host/lib/rfnoc/ddc_block_control.cpp
+++ b/host/lib/rfnoc/ddc_block_control.cpp
@@ -71,6 +71,7 @@ public:
                                             << " halfbands and "
                                                "max CIC decimation "
                                             << _cic_max_decim);
+        set_mtu_forwarding_policy(forwarding_policy_t::ONE_TO_ONE);
         // Load list of valid decimation values
         std::set<size_t> decims{1}; // 1 is always a valid decimatino
         for (size_t hb = 0; hb < _num_halfbands; hb++) {