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eth: Fix SGMII replication sync in 8-bit AXIS/BASE-X decode module

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Signed-off-by: Alex Forencich <alex@alexforencich.com>
This commit is contained in:
Alex Forencich
2026-07-09 16:44:13 -07:00
parent f21e9d096c
commit a57c523473
2 changed files with 5 additions and 13 deletions
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14
src/eth/rtl/taxi_axis_basex_rx_8.sv
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@@ -158,7 +158,6 @@ logic is_8021q_reg = 1'b0, is_8021q_next;
logic [15:0] frame_len_reg = '0, frame_len_next;
logic [15:0] frame_len_lim_reg = '0, frame_len_lim_next;
logic frame_len_lim_check_reg = '0, frame_len_lim_check_next;
logic odd_reg = 1'b0, odd_next;
logic [6:0] rep_cnt_reg = '0;
logic rep_stall_reg = 1'b0;
@@ -269,7 +268,6 @@ always_comb begin
frame_len_next = frame_len_reg;
frame_len_lim_next = frame_len_lim_reg;
frame_len_lim_check_next = frame_len_lim_check_reg;
odd_next = odd_reg;
m_axis_rx_tdata_next = '0;
m_axis_rx_tvalid_next = 1'b0;
@@ -300,8 +298,6 @@ always_comb begin
state_next = state_reg;
end else begin
odd_next = !odd_reg;
// counter to measure frame length
if (&frame_len_reg == 0) begin
frame_len_next = frame_len_reg + 1;
@@ -489,7 +485,6 @@ always_ff @(posedge clk) begin
frame_len_reg <= frame_len_next;
frame_len_lim_reg <= frame_len_lim_next;
frame_len_lim_check_reg <= frame_len_lim_check_next;
odd_reg <= odd_next;
m_axis_rx_tdata_reg <= m_axis_rx_tdata_next;
m_axis_rx_tvalid_reg <= m_axis_rx_tvalid_next;
@@ -592,16 +587,13 @@ always_ff @(posedge clk) begin
end
if (SGMII_EN && cfg_rx_sgmii_en) begin
if (encoded_rx_data != encoded_rx_data_d0_reg || encoded_rx_data_k) begin
rep_stall_reg <= !rep_stall_reg;
if ((encoded_rx_data != encoded_rx_data_d0_reg && rep_stall_reg) || encoded_rx_data_k) begin
case (cfg_rx_sgmii_speed)
2'b00: rep_cnt_reg <= 98; // 10 Mbps
2'b01: rep_cnt_reg <= 8; // 100 Mbps
default: begin
rep_cnt_reg <= 0;
rep_stall_reg <= 1'b0;
end
default: rep_cnt_reg <= 0;
endcase
rep_stall_reg <= 1'b0;
end else if (rep_cnt_reg == 0) begin
case (cfg_rx_sgmii_speed)
2'b00: rep_cnt_reg <= 99; // 10 Mbps

4
src/eth/tb/taxi_axis_basex_rx_8/test_taxi_axis_basex_rx_8.py
View File

@@ -334,14 +334,14 @@ if getattr(cocotb, 'top', None) is not None:
factory = TestFactory(run_test)
factory.add_option("payload_lengths", [size_list])
factory.add_option("payload_data", [incrementing_payload])
# factory.add_option("ifg", list(range(0, 13)))
factory.add_option("ifg", [0, 1, 11, 12])
factory.add_option("pre_len", [8, 7])
factory.add_option("sgmii_speed", [None, 1, 2])
factory.add_option("gbx_cfg", gbx_cfgs)
factory.generate_tests()
factory = TestFactory(run_test_oversize)
# factory.add_option("ifg", list(range(0, 13)))
factory.add_option("ifg", [0, 1, 11, 12])
factory.add_option("sgmii_speed", [None, 1, 2])
factory.add_option("gbx_cfg", gbx_cfgs)
factory.generate_tests()