Start work on tx ctrl

hw/super6502_fpga/src/sub/network_processor/sources.list

@@ -9,6 +9,7 @@ src/regs/ntw_top_regfile.sv
 src/network_processor.sv
 src/tcp_pkg.sv
 src/tcp_tx_ctrl.sv
+src/tcp_packet_generator.sv
 src/tcp_state_manager.sv
 src/tcp_stream.sv
 src/tcp.sv

hw/super6502_fpga/src/sub/network_processor/src/tcp.sv

@@ -64,7 +64,6 @@ localparam USER_WIDTH = 1;
 localparam DEST_WIDTH = 8;
 localparam ID_WIDTH = 8;
 
-ip_intf #(.DATA_WIDTH(8)) tcp_tx_ip();
 ip_intf #(.DATA_WIDTH(8)) tcp_stream_tx_ip [NUM_TCP]();
 ip_intf #(.DATA_WIDTH(8)) tcp_rx_ip [NUM_TCP]();
 ip_intf #(.DATA_WIDTH(8)) tcp_stream_rx_ip [NUM_TCP]();
@@ -184,7 +183,7 @@ ip_arb_mux_wrapper #(
     .i_rst    (i_rst),
 
     .s_ip   (tcp_stream_tx_ip),
-    .m_ip   (tcp_tx_ip)
+    .m_ip   (m_ip)
 );
 
 

hw/super6502_fpga/src/sub/network_processor/src/tcp_packet_generator.sv

@@ -1,6 +1,6 @@
 module tcp_packet_generator (
     input  wire             i_clk,
-    input  wire             i_rst
+    input  wire             i_rst,
 
     axis_intf.SLAVE         s_axis_data,
 
@@ -9,10 +9,28 @@ module tcp_packet_generator (
     input  wire [15:0]      i_source_port,
     input  wire [15:0]      i_dest_port,
     input  wire [7:0]       i_flags,
-    input  wire [15:0]      i_window_size
+    input  wire [15:0]      i_window_size,
-    input  wire             i_hdr_valid
+    input  wire             i_hdr_valid,
+
+    input  wire [31:0]      i_src_ip,
+    input  wire [31:0]      i_dst_ip,
 
     ip_intf.MASTER          m_ip
 );
 
+always_comb begin
+    m_ip.ip_hdr_valid = '0;
+
+    if (i_hdr_valid) begin
+        m_ip.ip_hdr_valid   = '1;
+        m_ip.ip_dscp        = '0;
+        m_ip.ip_ecn         = '0;
+        m_ip.ip_length      = '0;
+        m_ip.ip_ttl         = '1;
+        m_ip.ip_protocol    = 8'h6;
+        m_ip.ip_source_ip   = i_src_ip;
+        m_ip.ip_dest_ip     = i_dst_ip;
+    end
+end
+
 endmodule

hw/super6502_fpga/src/sub/network_processor/src/tcp_stream.sv

@@ -40,11 +40,11 @@ tcp_pkg::tx_ctrl_t tx_ctrl;
 logic tx_ctrl_valid;
 logic tx_ctrl_ack;
 
-logic [31:0]         o_seq_number;
+logic [31:0]         w_tx_seq_number;
-logic [31:0]         o_ack_number;
+logic [31:0]         w_tx_ack_number;
-logic [7:0]          o_flags;
+logic [7:0]          w_tx_flags;
-logic [15:0]         o_window_size;
+logic [15:0]         w_tx_window_size;
-logic                o_hdr_vali;
+logic                w_tx_hdr_valid;
 
 tcp_pkg::rx_msg_t rx_msg;
 
@@ -179,7 +179,9 @@ tcp_packet_generator u_tcp_packet_generator (
     .i_dest_port                (hwif_out.dest_port.d.value),
     .i_flags                    (w_tx_flags),
     .i_window_size              (w_tx_window_size),
-    .i_hdr_valid                (w_tx_hdr_valid)
+    .i_hdr_valid                (w_tx_hdr_valid),
+    .i_src_ip                   (hwif_out.source_ip.d.value),
+    .i_dst_ip                   (hwif_out.dest_ip.d.value),
 
     .m_ip                       (m_ip_tx)
 );

hw/super6502_fpga/src/sub/network_processor/src/tcp_tx_ctrl.sv

@@ -15,6 +15,15 @@ module tcp_tx_ctrl(
     output logic                o_hdr_valid
 );
 
+localparam FLAG_FIN = (1 << 0);
+localparam FLAG_SYN = (1 << 1);
+localparam FLAG_RST = (1 << 2);
+localparam FLAG_PSH = (1 << 3);
+localparam FLAG_ACK = (1 << 4);
+localparam FLAG_URG = (1 << 5);
+localparam FLAG_ECE = (1 << 6);
+localparam FLAG_CWR = (1 << 7);
+
 enum logic [2:0] {IDLE, SEND_SYN} state, state_next;
 
 always_ff @(posedge i_clk) begin
@@ -26,12 +35,27 @@ always_ff @(posedge i_clk) begin
 end
 
 always_comb begin
+    o_seq_number    = '0;
+    o_ack_number    = '0;
+    o_flags         = '0;
+    o_window_size   = '0;
+    o_hdr_valid     = '0;
+
     case (state)
         IDLE: begin
-            if (i_tx_ctrl) begin
+            if (i_tx_ctrl_valid) begin
                 o_tx_ctrl_ack = '1;
+
+                case (i_tx_ctrl)
+                    TX_CTRL_SEND_SYN: state_next = SEND_SYN;
+                endcase
             end
         end
+
+        SEND_SYN: begin
+            o_flags = FLAG_SYN;
+            o_hdr_valid = '1;
+        end
     endcase
 end