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RC channel backpressure fix

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This commit is contained in:
Alex Forencich 2019-01-22 22:50:15 -08:00
parent 263bb5c670
commit fac972bfe6
1 changed files with 5 additions and 2 deletions
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7
rtl/pcie_us_axi_dma_rd.v
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@ -687,10 +687,11 @@ always @* begin
tlp_state_next = TLP_STATE_WAIT_END; tlp_state_next = TLP_STATE_WAIT_END;
end end
end else begin end else begin
s_axis_rc_tready_next = 1'b0;
tlp_state_next = TLP_STATE_IDLE; tlp_state_next = TLP_STATE_IDLE;
end end
end else begin end else begin
s_axis_rc_tready_next = !m_axi_awvalid || m_axi_awready; s_axis_rc_tready_next = 1'b1;
if (s_axis_rc_tready && s_axis_rc_tvalid) begin if (s_axis_rc_tready && s_axis_rc_tvalid) begin
// header fields // header fields
@ -723,13 +724,15 @@ always @* begin
final_cpl_next = 1'b1; final_cpl_next = 1'b1;
end end
s_axis_rc_tready_next = 1'b0;
if (s_axis_rc_tlast) begin if (s_axis_rc_tlast) begin
s_axis_rc_tready_next = !m_axi_awvalid || m_axi_awready;
tlp_state_next = TLP_STATE_IDLE; tlp_state_next = TLP_STATE_IDLE;
end else begin end else begin
s_axis_rc_tready_next = 1'b0;
tlp_state_next = TLP_STATE_HEADER; tlp_state_next = TLP_STATE_HEADER;
end end
end else begin end else begin
s_axis_rc_tready_next = !m_axi_awvalid || m_axi_awready;
tlp_state_next = TLP_STATE_IDLE; tlp_state_next = TLP_STATE_IDLE;
end end
end end