rfnoc: Use adapter_id_t for balancing load across links

Since the mb_iface allocates local device IDs, also have it track
the associated adapter IDs and provide a facility to retrieve them.
Incorporate the adapter IDs in the user API to select the adapter
for streamers.

1 files changed, 11 insertions, 0 deletions

diff --git a/host/lib/include/uhdlib/rfnoc/mb_iface.hpp b/host/lib/include/uhdlib/rfnoc/mb_iface.hpp
index 1a06d44e2..abfc9d1c4 100644
--- a/host/lib/include/uhdlib/rfnoc/mb_iface.hpp
+++ b/host/lib/include/uhdlib/rfnoc/mb_iface.hpp
@@ -7,6 +7,7 @@
 #ifndef INCLUDED_LIBUHD_MB_IFACE_HPP
 #define INCLUDED_LIBUHD_MB_IFACE_HPP
 
+#include <uhd/transport/adapter_id.hpp>
 #include <uhd/types/endianness.hpp>
 #include <uhdlib/rfnoc/chdr_ctrl_xport.hpp>
 #include <uhdlib/rfnoc/chdr_rx_data_xport.hpp>
@@ -66,6 +67,16 @@ public:
      */
     virtual std::vector<device_id_t> get_local_device_ids() = 0;
 
+    /*! Return the uhd::transport::adapter_id for the link associated with
+     * \p local_device_id
+     *
+     * A transport must be created on the adapter before this will be valid.
+     * Since link_stream_managers always create a chdr_ctrl_xport on
+     * construction, the requirement is satisfied.
+     */
+    virtual uhd::transport::adapter_id_t get_adapter_id(
+        const device_id_t local_device_id) = 0;
+
     /*! Reset the device
      */
     virtual void reset_network() = 0;