fpga: x400: Add ifdef to remove QSFP wrappers when unused

Original-commit: 4c085c2b5849913231a4d1403a4dff1d570b8d5d

top/x400/x4xx.v

@@ -830,6 +830,7 @@ module x4xx (
     .sysref_out_pclk               (),
     .sysref_out_rclk               (),
     .sysref_pl_in                  (sysref_pl),
+  `ifdef QSFP0_0
     .s_axi_hp0_aruser              (axi_hp0_aruser),
     .s_axi_hp0_awuser              (axi_hp0_awuser),
     .s_axi_hp0_awid                (axi_hp0_awid),
@@ -869,11 +870,20 @@ module x4xx (
     .s_axi_hp0_rready              (axi_hp0_rready),
     .s_axi_hp0_awqos               (axi_hp0_awqos),
     .s_axi_hp0_arqos               (axi_hp0_arqos),
+  `else
+    // Disconnect the DMA interface if the associated QSFP port is not used.
+    .s_axi_hp0_awvalid             (1'b0),
+    .s_axi_hp0_wvalid              (1'b0),
+    .s_axi_hp0_bready              (1'b1),
+    .s_axi_hp0_arvalid             (1'b0),
+    .s_axi_hp0_rready              (1'b1),
+  `endif
     .s_axis_eth_dma_tdata          (e2h_dma_tdata),
     .s_axis_eth_dma_tkeep          (e2h_dma_tkeep),
     .s_axis_eth_dma_tlast          (e2h_dma_tlast),
     .s_axis_eth_dma_tready         (e2h_dma_tready),
     .s_axis_eth_dma_tvalid         (e2h_dma_tvalid),
+  `ifdef QSFP1_0
     .s_axi_hp1_aruser              (axi_hp1_aruser),
     .s_axi_hp1_awuser              (axi_hp1_awuser),
     .s_axi_hp1_awid                (axi_hp1_awid),
@@ -913,6 +923,14 @@ module x4xx (
     .s_axi_hp1_rready              (axi_hp1_rready),
     .s_axi_hp1_awqos               (axi_hp1_awqos),
     .s_axi_hp1_arqos               (axi_hp1_arqos),
+  `else
+    // Disconnect the DMA interface if the associated QSFP port is not used.
+    .s_axi_hp1_awvalid             (1'b0),
+    .s_axi_hp1_wvalid              (1'b0),
+    .s_axi_hp1_bready              (1'b1),
+    .s_axi_hp1_arvalid             (1'b0),
+    .s_axi_hp1_rready              (1'b1),
+  `endif
     .s_axi_hpc0_aruser             (),
     .s_axi_hpc0_awuser             (),
     .s_axi_hpc0_awid               (),
@@ -1639,6 +1657,7 @@ module x4xx (
     assign qsfp1_rx_n[3] = 1'b1;
   `endif
 
+  `ifdef QSFP0_0
     x4xx_qsfp_wrapper_temp #(
       `ifdef QSFP0_0
       .PROTOCOL0      (`QSFP0_0),
@@ -1753,8 +1772,10 @@ module x4xx (
       .link_up        (eth0_link_up),
       .activity       (eth0_activity)
     );
+  `endif
 
 
+  `ifdef QSFP1_0
     x4xx_qsfp_wrapper_temp #(
       `ifdef QSFP1_0
       .PROTOCOL0      (`QSFP1_0),
@@ -1869,6 +1890,7 @@ module x4xx (
       .link_up        (eth1_link_up),
       .activity       (eth1_activity)
     );
+  `endif
 
 
   //---------------------------------------------------------------------------