rfnoc: Added impl for reg_iface and ctrl_endpoint

- Added new register_iface class that translates high-level
  peek/poke calls into CHDR control payloads
- Added new chdr_ctrl_endpoint class that emulates a control
  stream endpoint in SW. It can create and handle multiple
  register interfaces

1 files changed, 62 insertions, 0 deletions

diff --git a/host/lib/include/uhdlib/rfnoc/chdr_ctrl_endpoint.hpp b/host/lib/include/uhdlib/rfnoc/chdr_ctrl_endpoint.hpp
new file mode 100644
index 000000000..c13955888
--- /dev/null
+++ b/host/lib/include/uhdlib/rfnoc/chdr_ctrl_endpoint.hpp
@@ -0,0 +1,62 @@
+//
+// Copyright 2019 Ettus Research, a National Instruments Brand
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+
+#ifndef INCLUDED_LIBUHD_RFNOC_CHDR_CTRL_ENDPOINT_HPP
+#define INCLUDED_LIBUHD_RFNOC_CHDR_CTRL_ENDPOINT_HPP
+
+#include <uhdlib/rfnoc/chdr/chdr_types.hpp>
+#include <uhdlib/rfnoc/ctrlport_endpoint.hpp>
+#include <uhdlib/rfnoc/xports.hpp>
+#include <functional>
+#include <memory>
+
+namespace uhd { namespace rfnoc {
+
+/*! A software interface that represents a CHDR control endpoint
+ *
+ *  The endpoint is capable of sending/receiving CHDR packets
+ *  and creating multiple ctrlport_endpoint interfaces
+ */
+class chdr_ctrl_endpoint
+{
+public:
+    using uptr = std::unique_ptr<chdr_ctrl_endpoint>;
+
+    virtual ~chdr_ctrl_endpoint() = 0;
+
+    //! Creates a new register interface for the specified port
+    //
+    // \param port The port number on the control crossbar
+    // \param buff_capacity The buffer capacity of the downstream buff in 32-bit words
+    // \param max_outstanding_async_msgs Max outstanding async messages allowed
+    // \param ctrl_clk_freq Frequency of the clock driving the ctrlport logic
+    // \param timebase_freq Frequency of the timebase (for timed commands)
+    //
+    virtual ctrlport_endpoint::sptr get_ctrlport_ep(uint16_t port,
+        size_t buff_capacity,
+        size_t max_outstanding_async_msgs,
+        double ctrl_clk_freq,
+        double timebase_freq) = 0;
+
+    //! Returns the number of dropped packets due to misclassification
+    virtual size_t get_num_drops() const = 0;
+
+    //! Creates a control endpoint object
+    //
+    // \param xports The transports used to send and recv packets
+    // \param pkt_factor An instance of the CHDR packet factory
+    // \param my_epid The endpoint ID of this software endpoint
+    //
+    static uptr make(const both_xports_t& xports,
+        const chdr::chdr_packet_factory& pkt_factory,
+        sep_id_t dst_epid,
+        sep_id_t my_epid);
+
+}; // class chdr_ctrl_endpoint
+
+}} /* namespace uhd::rfnoc */
+
+#endif /* INCLUDED_LIBUHD_RFNOC_CHDR_CTRL_ENDPOINT_HPP */