fpga: rfnoc: Regenerate noc_shells

19 files changed, 49 insertions, 30 deletions

diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_addsub/noc_shell_addsub.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_addsub/noc_shell_addsub.v
index ae21cb308..67b2237f4 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_addsub/noc_shell_addsub.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_addsub/noc_shell_addsub.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none
@@ -165,12 +166,12 @@ module noc_shell_addsub #(
 
   wire ce_rst_pulse;
 
-  pulse_synchronizer #(.MODE ("POSEDGE")) pulse_synchronizer_ce_clk (
+  pulse_synchronizer #(.MODE ("POSEDGE")) pulse_synchronizer_ce (
     .clk_a(rfnoc_chdr_clk), .rst_a(1'b0), .pulse_a (rfnoc_chdr_rst), .busy_a (),
     .clk_b(ce_clk), .pulse_b (ce_rst_pulse)
   );
 
-  pulse_stretch_min #(.LENGTH(32)) pulse_stretch_min_ce_clk (
+  pulse_stretch_min #(.LENGTH(32)) pulse_stretch_min_ce (
     .clk(ce_clk), .rst(1'b0),
     .pulse_in(ce_rst_pulse), .pulse_out(ce_rst)
   );
diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_axi_ram_fifo/noc_shell_axi_ram_fifo.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_axi_ram_fifo/noc_shell_axi_ram_fifo.v
index 539622831..a3a9ed186 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_axi_ram_fifo/noc_shell_axi_ram_fifo.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_axi_ram_fifo/noc_shell_axi_ram_fifo.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none
diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_ddc/noc_shell_ddc.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_ddc/noc_shell_ddc.v
index a4874114f..f4cd87abb 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_ddc/noc_shell_ddc.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_ddc/noc_shell_ddc.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none
@@ -234,7 +235,7 @@ module noc_shell_ddc #(
       .NIPC           (1),
       .SYNC_CLKS      (0),
       .INFO_FIFO_SIZE ($clog2(32)),
-      .PYLD_FIFO_SIZE ($clog2(MTU))
+      .PYLD_FIFO_SIZE ($clog2(32))
     ) chdr_to_axis_data_in_in (
       .axis_chdr_clk      (rfnoc_chdr_clk),
       .axis_chdr_rst      (rfnoc_chdr_rst),
@@ -272,7 +273,7 @@ module noc_shell_ddc #(
       .NIPC            (1),
       .SYNC_CLKS       (0),
       .INFO_FIFO_SIZE  ($clog2(32)),
-      .PYLD_FIFO_SIZE  ($clog2(MTU)),
+      .PYLD_FIFO_SIZE  ($clog2(2**MTU)),
       .MTU             (MTU),
       .SIDEBAND_AT_END (1)
     ) axis_data_to_chdr_out_out (
diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_duc/noc_shell_duc.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_duc/noc_shell_duc.v
index 5645a2442..ef5231ed7 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_duc/noc_shell_duc.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_duc/noc_shell_duc.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none
@@ -234,7 +235,7 @@ module noc_shell_duc #(
       .NIPC           (1),
       .SYNC_CLKS      (0),
       .INFO_FIFO_SIZE ($clog2(32)),
-      .PYLD_FIFO_SIZE ($clog2(MTU))
+      .PYLD_FIFO_SIZE ($clog2(32))
     ) chdr_to_axis_data_in_in (
       .axis_chdr_clk      (rfnoc_chdr_clk),
       .axis_chdr_rst      (rfnoc_chdr_rst),
@@ -272,7 +273,7 @@ module noc_shell_duc #(
       .NIPC            (1),
       .SYNC_CLKS       (0),
       .INFO_FIFO_SIZE  ($clog2(32)),
-      .PYLD_FIFO_SIZE  ($clog2(MTU)),
+      .PYLD_FIFO_SIZE  ($clog2(2**MTU)),
       .MTU             (MTU),
       .SIDEBAND_AT_END (1)
     ) axis_data_to_chdr_out_out (
diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_fft/noc_shell_fft.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_fft/noc_shell_fft.v
index 31c2f320a..96e3dbdd1 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_fft/noc_shell_fft.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_fft/noc_shell_fft.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none
diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_fir_filter/noc_shell_fir_filter.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_fir_filter/noc_shell_fir_filter.v
index 8614f0f29..a95946379 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_fir_filter/noc_shell_fir_filter.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_fir_filter/noc_shell_fir_filter.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none
diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_fosphor/noc_shell_fosphor.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_fosphor/noc_shell_fosphor.v
index 1eecf3a0a..c2ff06ce2 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_fosphor/noc_shell_fosphor.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_fosphor/noc_shell_fosphor.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none
diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_keep_one_in_n/noc_shell_keep_one_in_n.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_keep_one_in_n/noc_shell_keep_one_in_n.v
index c3fd16bc7..6f372f0aa 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_keep_one_in_n/noc_shell_keep_one_in_n.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_keep_one_in_n/noc_shell_keep_one_in_n.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none
@@ -269,7 +270,7 @@ module noc_shell_keep_one_in_n #(
       .NIPC            (1),
       .SYNC_CLKS       (0),
       .INFO_FIFO_SIZE  ($clog2(32)),
-      .PYLD_FIFO_SIZE  ($clog2(MTU)),
+      .PYLD_FIFO_SIZE  ($clog2(2**MTU)),
       .MTU             (MTU),
       .SIDEBAND_AT_END (1)
     ) axis_data_to_chdr_out_out (
diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_logpwr/noc_shell_logpwr.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_logpwr/noc_shell_logpwr.v
index 434793ffd..af23f3e69 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_logpwr/noc_shell_logpwr.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_logpwr/noc_shell_logpwr.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none
diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_moving_avg/noc_shell_moving_avg.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_moving_avg/noc_shell_moving_avg.v
index c44d28eea..0972d4453 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_moving_avg/noc_shell_moving_avg.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_moving_avg/noc_shell_moving_avg.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none
diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_null_src_sink/noc_shell_null_src_sink.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_null_src_sink/noc_shell_null_src_sink.v
index 177b58af2..ca6d423c5 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_null_src_sink/noc_shell_null_src_sink.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_null_src_sink/noc_shell_null_src_sink.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none
diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_radio/noc_shell_radio.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_radio/noc_shell_radio.v
index 5909e0e39..da0d7d0f4 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_radio/noc_shell_radio.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_radio/noc_shell_radio.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none
@@ -250,7 +251,7 @@ module noc_shell_radio #(
       .NIPC           (NIPC),
       .SYNC_CLKS      (0),
       .INFO_FIFO_SIZE ($clog2(32)),
-      .PYLD_FIFO_SIZE ($clog2(MTU))
+      .PYLD_FIFO_SIZE ($clog2(2**MTU))
     ) chdr_to_axis_data_in_in (
       .axis_chdr_clk      (rfnoc_chdr_clk),
       .axis_chdr_rst      (rfnoc_chdr_rst),
@@ -288,7 +289,7 @@ module noc_shell_radio #(
       .NIPC            (NIPC),
       .SYNC_CLKS       (0),
       .INFO_FIFO_SIZE  ($clog2(32)),
-      .PYLD_FIFO_SIZE  ($clog2(MTU)),
+      .PYLD_FIFO_SIZE  ($clog2(2**(MTU+1))),
       .MTU             (MTU),
       .SIDEBAND_AT_END (1)
     ) axis_data_to_chdr_out_out (
diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_replay/noc_shell_replay.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_replay/noc_shell_replay.v
index 51f018b99..c1a5558b4 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_replay/noc_shell_replay.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_replay/noc_shell_replay.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none
@@ -233,7 +234,7 @@ module noc_shell_replay #(
       .NIPC           (MEM_DATA_W/32),
       .SYNC_CLKS      (0),
       .INFO_FIFO_SIZE ($clog2(32)),
-      .PYLD_FIFO_SIZE ($clog2(MTU))
+      .PYLD_FIFO_SIZE ($clog2(32))
     ) chdr_to_axis_data_in_in (
       .axis_chdr_clk      (rfnoc_chdr_clk),
       .axis_chdr_rst      (rfnoc_chdr_rst),
@@ -271,7 +272,7 @@ module noc_shell_replay #(
       .NIPC            (MEM_DATA_W/32),
       .SYNC_CLKS       (0),
       .INFO_FIFO_SIZE  ($clog2(32)),
-      .PYLD_FIFO_SIZE  ($clog2(MTU)),
+      .PYLD_FIFO_SIZE  ($clog2(2**MTU)),
       .MTU             (MTU),
       .SIDEBAND_AT_END (1)
     ) axis_data_to_chdr_out_out (
diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_siggen/noc_shell_siggen.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_siggen/noc_shell_siggen.v
index 4e8b99e98..5dca06614 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_siggen/noc_shell_siggen.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_siggen/noc_shell_siggen.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none
diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_split_stream/noc_shell_split_stream.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_split_stream/noc_shell_split_stream.v
index 8d6c1ebff..4f57ec985 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_split_stream/noc_shell_split_stream.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_split_stream/noc_shell_split_stream.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none
diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_switchboard/noc_shell_switchboard.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_switchboard/noc_shell_switchboard.v
index 2beb37ef3..88d16b7fe 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_switchboard/noc_shell_switchboard.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_switchboard/noc_shell_switchboard.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none
diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_vector_iir/noc_shell_vector_iir.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_vector_iir/noc_shell_vector_iir.v
index fd80ac71d..2c3263e65 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_vector_iir/noc_shell_vector_iir.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_vector_iir/noc_shell_vector_iir.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none
diff --git a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_window/noc_shell_window.v b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_window/noc_shell_window.v
index 7855d1ee8..6ec180313 100644
--- a/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_window/noc_shell_window.v
+++ b/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_window/noc_shell_window.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //   NUM_PORTS   : Number of window module instances to connect
 //
 
diff --git a/host/examples/rfnoc-example/fpga/rfnoc_block_gain/noc_shell_gain.v b/host/examples/rfnoc-example/fpga/rfnoc_block_gain/noc_shell_gain.v
index c5a3ff2e7..2e6dc4715 100644
--- a/host/examples/rfnoc-example/fpga/rfnoc_block_gain/noc_shell_gain.v
+++ b/host/examples/rfnoc-example/fpga/rfnoc_block_gain/noc_shell_gain.v
@@ -1,5 +1,5 @@
 //
-// Copyright 2021 Ettus Research, a National Instruments Brand
+// Copyright 2022 Ettus Research, a National Instruments Brand
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -15,6 +15,7 @@
 //   THIS_PORTID : Control crossbar port to which this block is connected
 //   CHDR_W      : AXIS-CHDR data bus width
 //   MTU         : Maximum transmission unit (i.e., maximum packet size in
+//                 CHDR words is 2**MTU).
 //
 
 `default_nettype none