1 files changed, 102 insertions, 0 deletions
diff --git a/source/metrics.v b/source/metrics.v
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+/*
+ *       metrics.v
+ *       
+ *   Copyright (C) 2018, 2019 Mind Chasers Inc.
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ *
+ *	function: Collect metrics here and register them for transmit
+ *
+ *		
+ */
+ 
+`timescale 1ns /10ps
+
+module metrics(
+		input rstn,
+		input clk,
+		input mode_100Mbit,
+
+		// input data for gathering metrics
+		input [3:0] rx_mac_keep,
+		input rx_pf_keep_01,
+		input rx_pf_keep_02,
+		input rx_pf_keep_10,
+		input rx_pf_keep_12,
+		input rx_pf_keep_20,
+		input rx_pf_keep_21,
+		input rx_pf_keep_23,
+	
+		input [3:0] rx_eop, 
+		input [3:0] rx_sop,
+		input [3:0] tx_eop,
+		input [3:0] tx_sop,
+		
+		// metric outputs
+		input metrics_start,
+		output reg [8:0] metrics_d
+);
+	
+reg [7:0] rx_pkt_cnt;
+reg [7:0] tx_pkt_cnt;
+
+reg [7:0] rx0_drop_cnt;
+reg [7:0] rx1_drop_cnt;
+
+reg [3:0] bit_cnt;
+reg [3:0] addr;
+
+always @(posedge clk or negedge rstn)
+	if (!rstn) begin
+		bit_cnt <= 4'h0;
+		addr <= 4'h0;
+		end
+	else if ( metrics_start ) begin
+		bit_cnt <= 4'h0;
+		addr <= 4'h0;
+		end
+	else if ( !mode_100Mbit || ( mode_100Mbit && bit_cnt == 4'h9 ) ) begin
+		bit_cnt <= 4'h0;
+		addr <= addr + 1;
+		end
+	else 
+		bit_cnt <= bit_cnt + 1;
+		
+always @(posedge clk or negedge rstn)
+	if (!rstn)
+		rx_pkt_cnt <= 'h0;
+	else if (rx_eop[2])
+		rx_pkt_cnt <= rx_pkt_cnt + 1;
+		
+always @(posedge clk or negedge rstn)
+	if (!rstn)
+		tx_pkt_cnt <= 'h0;
+	else if (tx_eop[2])
+		tx_pkt_cnt <= tx_pkt_cnt + 1;
+	
+always @(posedge clk or negedge rstn)
+	if (!rstn)
+		metrics_d <= 9'h100;
+	else begin
+		case(addr)
+			'h0: metrics_d <=  { 1'b0, rx_pkt_cnt };
+			'h1: metrics_d <=  { 1'b0, tx_pkt_cnt };
+			'h2: metrics_d <=  { 1'b0, rx0_drop_cnt };
+			'h3: metrics_d <=  { 1'b1, rx1_drop_cnt };
+			default: metrics_d <= 9'h100;
+		endcase
+	end
+		
+
+
+endmodule