rfnoc: add rx and tx transports, and amend rfnoc_graph

transports:

Transports build on I/O service and implements flow control and
sequence number checking.

The rx streamer subclass extends the streamer implementation to connect
it to the rfnoc graph. It receives configuration values from property
propagation and configures the streamer accordingly. It also implements
the issue_stream_cmd rx_streamer API method.

Add implementation of rx streamer creation and method to connect it to
an rfnoc block.

rfnoc_graph: Cache more connection info, clarify contract

Summary of changes:
- rfnoc_graph stores more information about static connections at the
  beginning. Some search algorithms are replaced by simpler lookups.
- The contract for connect() was clarified. It is required to call
  connect, even for static connections.

1 files changed, 21 insertions, 0 deletions

diff --git a/host/lib/include/uhdlib/rfnoc/rfnoc_common.hpp b/host/lib/include/uhdlib/rfnoc/rfnoc_common.hpp
index 7ec1b7bb2..bc56fd311 100644
--- a/host/lib/include/uhdlib/rfnoc/rfnoc_common.hpp
+++ b/host/lib/include/uhdlib/rfnoc/rfnoc_common.hpp
@@ -41,6 +41,8 @@ using device_id_t = uint16_t;
 using sep_inst_t = uint16_t;
 //! Stream Endpoint Physical Address Type
 using sep_addr_t = std::pair<device_id_t, sep_inst_t>;
+//! Stream Endpoint Physical Address Type (first = source, second = destination)
+using sep_addr_pair_t = std::pair<sep_addr_t, sep_addr_t>;
 //! Stream Endpoint ID Type
 using sep_id_t = uint16_t;
 //! Stream Endpoint pair Type (first = source, second = destination)
@@ -65,6 +67,19 @@ struct stream_buff_params_t
 
 //! The data type of the buffer used to capture/generate data
 enum sw_buff_t { BUFF_U64 = 0, BUFF_U32 = 1, BUFF_U16 = 2, BUFF_U8 = 3 };
+//! Conversion from number of bits to sw_buff
+constexpr sw_buff_t bits_to_sw_buff(size_t bits)
+{
+    if (bits <= 8) {
+        return BUFF_U8;
+    } else if (bits <= 16) {
+        return BUFF_U16;
+    } else if (bits <= 32) {
+        return BUFF_U32;
+    } else {
+        return BUFF_U64;
+    }
+}
 
 //----------------------------------------------
 // Constants
@@ -72,6 +87,12 @@ enum sw_buff_t { BUFF_U64 = 0, BUFF_U32 = 1, BUFF_U16 = 2, BUFF_U8 = 3 };
 
 constexpr uint16_t RFNOC_PROTO_VER = 0x0100;
 
+constexpr uint64_t MAX_FC_CAPACITY_BYTES = (uint64_t(1) << 40) - 1;
+constexpr uint32_t MAX_FC_CAPACITY_PKTS  = (uint32_t(1) << 24) - 1;
+constexpr uint64_t MAX_FC_FREQ_BYTES     = (uint64_t(1) << 40) - 1;
+constexpr uint32_t MAX_FC_FREQ_PKTS      = (uint32_t(1) << 24) - 1;
+constexpr uint64_t MAX_FC_HEADROOM_BYTES = (uint64_t(1) << 16) - 1;
+constexpr uint32_t MAX_FC_HEADROOM_PKTS  = (uint32_t(1) << 8) - 1;
 
 }} // namespace uhd::rfnoc