| 1 | // ========== Copyright Header Begin ========================================== |
| 2 | // |
| 3 | // OpenSPARC T2 Processor File: bw_calc.v |
| 4 | // Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved |
| 5 | // 4150 Network Circle, Santa Clara, California 95054, U.S.A. |
| 6 | // |
| 7 | // * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 8 | // |
| 9 | // This program is free software; you can redistribute it and/or modify |
| 10 | // it under the terms of the GNU General Public License as published by |
| 11 | // the Free Software Foundation; version 2 of the License. |
| 12 | // |
| 13 | // This program is distributed in the hope that it will be useful, |
| 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | // GNU General Public License for more details. |
| 17 | // |
| 18 | // You should have received a copy of the GNU General Public License |
| 19 | // along with this program; if not, write to the Free Software |
| 20 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | // |
| 22 | // For the avoidance of doubt, and except that if any non-GPL license |
| 23 | // choice is available it will apply instead, Sun elects to use only |
| 24 | // the General Public License version 2 (GPLv2) at this time for any |
| 25 | // software where a choice of GPL license versions is made |
| 26 | // available with the language indicating that GPLv2 or any later version |
| 27 | // may be used, or where a choice of which version of the GPL is applied is |
| 28 | // otherwise unspecified. |
| 29 | // |
| 30 | // Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 31 | // CA 95054 USA or visit www.sun.com if you need additional information or |
| 32 | // have any questions. |
| 33 | // |
| 34 | // ========== Copyright Header End ============================================ |
| 35 | module bw_calc (/*AUTOARG*/ |
| 36 | // Inputs |
| 37 | clk, data, enb, port_num, no_of_pkts, pkt_len, cal_enb, |
| 38 | speed_10G); |
| 39 | |
| 40 | input clk; |
| 41 | input [7:0] data; |
| 42 | input enb; |
| 43 | input cal_enb; |
| 44 | input speed_10G; |
| 45 | input [1:0] port_num; |
| 46 | input [15:0] no_of_pkts; |
| 47 | input [15:0] pkt_len; |
| 48 | |
| 49 | |
| 50 | reg [1:0] bw_state; |
| 51 | reg [1:0] nxt_state; |
| 52 | integer data_byte_cnt; |
| 53 | integer ipg_byte_cnt; |
| 54 | real BW; |
| 55 | real BW_d; |
| 56 | real BW_in_pkts; |
| 57 | real avg_ipg_byte_cnt; |
| 58 | real bw_start_time; |
| 59 | real bw_end_time; |
| 60 | integer pkt_cnt; |
| 61 | integer no_of_txpkts; |
| 62 | integer packet_len; |
| 63 | real delta_time; |
| 64 | real delta_time1; |
| 65 | integer count; |
| 66 | reg [8*60:1] arg; |
| 67 | integer host_dly; |
| 68 | |
| 69 | // initial for defaulting the values |
| 70 | initial |
| 71 | begin |
| 72 | bw_state = 2'b00; |
| 73 | end |
| 74 | |
| 75 | // initial block for getting the latency number |
| 76 | |
| 77 | initial |
| 78 | begin |
| 79 | arg = "SIU_REQ_DLY="; |
| 80 | if($test$plusargs("SIU_REQ_DLY=")) begin |
| 81 | `ifdef AXIS |
| 82 | `else |
| 83 | host_dly = $util_get_plus_args_num(arg); |
| 84 | `endif |
| 85 | $display("BW_CALC: Host_dly %0d\n",host_dly); |
| 86 | end |
| 87 | end |
| 88 | |
| 89 | |
| 90 | |
| 91 | always @(nxt_state) |
| 92 | bw_state = nxt_state; |
| 93 | |
| 94 | always @(posedge clk) |
| 95 | begin |
| 96 | if(cal_enb && speed_10G) |
| 97 | calc_BW(bw_state,data,enb,port_num,no_of_pkts,pkt_len,nxt_state); |
| 98 | else if(cal_enb && ~speed_10G) |
| 99 | calc_BW_1G(bw_state,data,enb,port_num,no_of_pkts,pkt_len,nxt_state); |
| 100 | end |
| 101 | |
| 102 | |
| 103 | |
| 104 | task calc_BW; |
| 105 | |
| 106 | input [1:0] bw_state; |
| 107 | input [7:0] data; |
| 108 | input enb; |
| 109 | input [1:0] port_num; |
| 110 | input [15:0] no_of_pkts; |
| 111 | input [15:0] pkt_len; |
| 112 | |
| 113 | output [1:0] nxt_state; |
| 114 | |
| 115 | case(bw_state) |
| 116 | 2'b00 : begin |
| 117 | if((data == 8'hfb) && (enb == 1)) begin |
| 118 | nxt_state = 2'b01; |
| 119 | bw_start_time = $time; |
| 120 | $display("BW_CALC : START_TIME in BW %t for PORT %0d",bw_start_time,port_num); |
| 121 | end // if ((data == 8'hfb) && (enb == 1)) |
| 122 | else begin |
| 123 | nxt_state = 2'b00; |
| 124 | pkt_cnt = 0; |
| 125 | data_byte_cnt = 0; |
| 126 | ipg_byte_cnt = 0; |
| 127 | avg_ipg_byte_cnt = 0; |
| 128 | bw_start_time = 0; |
| 129 | bw_end_time = 0; |
| 130 | no_of_txpkts = no_of_pkts; |
| 131 | packet_len = pkt_len; |
| 132 | delta_time = 0; |
| 133 | end // else: !if((data == 8'hfb) && (enb == 1)) |
| 134 | end // case: 2'b00 |
| 135 | 2'b01 : begin |
| 136 | if((data == 8'hfd) && (enb == 1)) begin |
| 137 | pkt_cnt = pkt_cnt + 1; |
| 138 | if(pkt_cnt == no_of_txpkts) begin |
| 139 | nxt_state = 2'b00; |
| 140 | bw_end_time = $time; |
| 141 | |
| 142 | delta_time = (bw_end_time - bw_start_time)/1000000; |
| 143 | delta_time1 = (bw_end_time - bw_start_time); |
| 144 | $display("BW_CALC : DELTA_TIME in BW %t for PORT %0d",delta_time1,port_num); |
| 145 | $display("BW_CALC : END_TIME in BW %t for PORT %0d",bw_end_time,port_num); |
| 146 | |
| 147 | avg_ipg_byte_cnt = ipg_byte_cnt/no_of_pkts; |
| 148 | $display("BW_CALC : Avg_ipg_byte_cnt is %0f for PORT %0d",avg_ipg_byte_cnt,port_num); |
| 149 | |
| 150 | // print the BW calculated |
| 151 | BW = 8*no_of_pkts*1000*(packet_len + 8 + avg_ipg_byte_cnt)/delta_time1; |
| 152 | $display("BW_CALC: BW_ON_WIRE is %0f Gigabits/sec for Port %0d",BW,port_num); |
| 153 | |
| 154 | BW_d = 8*no_of_pkts*1000*packet_len/delta_time1; |
| 155 | $display("BW_CALC: BW_DATA is %0f Gigabits/sec for Port %0d",BW_d,port_num); |
| 156 | |
| 157 | BW_in_pkts = no_of_pkts/delta_time; |
| 158 | $display("BW_CALC : BW_IN_PKTS for port %0d is %f Million_pkts/sec",port_num,BW_in_pkts); |
| 159 | |
| 160 | if(packet_len == 64) begin |
| 161 | if(BW_in_pkts < 14.88) begin |
| 162 | if(host_dly < 140) |
| 163 | $display("BW_CALC : ERROR BW less than expected for port %0d",port_num); |
| 164 | else |
| 165 | $display("BW_CALC : Warning BW less than expected for port %0d",port_num); |
| 166 | end |
| 167 | end |
| 168 | else if(packet_len == 1518) begin |
| 169 | if(BW_in_pkts < 0.8) |
| 170 | $display("BW_CALC : ERROR BW less than expected for port %0d",port_num); |
| 171 | end |
| 172 | else if(packet_len == 9588) begin |
| 173 | if(BW_in_pkts < 0.1301) |
| 174 | $display("BW_CALC : ERROR BW less than expected for port %0d",port_num); |
| 175 | end |
| 176 | end |
| 177 | else |
| 178 | nxt_state = 2'b10; |
| 179 | end |
| 180 | else begin |
| 181 | data_byte_cnt = data_byte_cnt + 1; |
| 182 | nxt_state = 2'b01; |
| 183 | end |
| 184 | end |
| 185 | 2'b10 : begin |
| 186 | if((data == 8'hfb) && (enb == 1)) |
| 187 | nxt_state = 2'b01; |
| 188 | else begin |
| 189 | ipg_byte_cnt = ipg_byte_cnt + 1; |
| 190 | avg_ipg_byte_cnt = ipg_byte_cnt/no_of_pkts; |
| 191 | nxt_state = 2'b10; |
| 192 | end |
| 193 | end |
| 194 | endcase |
| 195 | endtask |
| 196 | |
| 197 | task calc_BW_1G; |
| 198 | |
| 199 | input [1:0] bw_state; |
| 200 | input [7:0] data; |
| 201 | input enb; |
| 202 | input [1:0] port_num; |
| 203 | input [15:0] no_of_pkts; |
| 204 | input [15:0] pkt_len; |
| 205 | |
| 206 | output [1:0] nxt_state; |
| 207 | |
| 208 | case(bw_state) |
| 209 | 2'b00 : begin |
| 210 | if(enb == 1'b1) begin |
| 211 | nxt_state = 2'b01; |
| 212 | bw_start_time = $time; |
| 213 | $display("BW_CALC_1G : START_TIME in BW %t for PORT %0d",bw_start_time,port_num); |
| 214 | end |
| 215 | else begin |
| 216 | nxt_state = 2'b00; |
| 217 | pkt_cnt = 0; |
| 218 | data_byte_cnt = 0; |
| 219 | ipg_byte_cnt = 0; |
| 220 | avg_ipg_byte_cnt = 0; |
| 221 | bw_start_time = 0; |
| 222 | bw_end_time = 0; |
| 223 | no_of_txpkts = no_of_pkts; |
| 224 | packet_len = pkt_len; |
| 225 | delta_time = 0; |
| 226 | count = 0; |
| 227 | end |
| 228 | end |
| 229 | 2'b01 : begin // check for frame delimiter in this state |
| 230 | if(enb) begin |
| 231 | // $display("BW_CALC_1G : COUNT in BW %0d for PORT %0d",count,port_num); |
| 232 | // $display("BW_CALC_1G : data in BW %0h for PORT %0d",data,port_num); |
| 233 | if(count < 6) begin |
| 234 | nxt_state = 2'b01; |
| 235 | count = count + 1; |
| 236 | end |
| 237 | else if((data == 8'hd5) && (count == 6)) begin |
| 238 | nxt_state = 2'b10; |
| 239 | count = 0; |
| 240 | end |
| 241 | else begin |
| 242 | nxt_state = 2'b00; |
| 243 | bw_start_time = 0; |
| 244 | end |
| 245 | end |
| 246 | else nxt_state = 2'b00; |
| 247 | end |
| 248 | 2'b10 : begin |
| 249 | if(enb == 1'b0) begin |
| 250 | pkt_cnt = pkt_cnt + 1; |
| 251 | if(pkt_cnt == no_of_txpkts) begin |
| 252 | nxt_state = 2'b00; |
| 253 | bw_end_time = $time; |
| 254 | |
| 255 | delta_time = (bw_end_time - bw_start_time)/1000000; |
| 256 | delta_time1 = (bw_end_time - bw_start_time); |
| 257 | $display("BW_CALC_1G : END_TIME in BW %t for PORT %0d",bw_end_time,port_num); |
| 258 | |
| 259 | avg_ipg_byte_cnt = ipg_byte_cnt/no_of_pkts; |
| 260 | $display("BW_CALC_1G : Avg_ipg_per_pkt is %0f for PORT %0d",avg_ipg_byte_cnt,port_num); |
| 261 | |
| 262 | // print the BW calculated |
| 263 | BW = (8*no_of_pkts*1000)*(packet_len + 8 + avg_ipg_byte_cnt)/delta_time1; |
| 264 | $display("BW_CALC_1G : BW_ON_WIRE is %0f Gigabits/sec for Port %0d",BW,port_num); |
| 265 | |
| 266 | BW_d = (8*no_of_pkts*1000*packet_len)/delta_time1; |
| 267 | $display("BW_CALC_1G : BW_DATA is %0f Gigabits/sec for Port %0d",BW_d,port_num); |
| 268 | |
| 269 | BW_in_pkts = no_of_pkts/delta_time; |
| 270 | $display("BW_CALC_1G : BW_IN_PKTS for port %0d is %f Million_pkts/sec",port_num,BW_in_pkts); |
| 271 | |
| 272 | if(packet_len == 64) begin |
| 273 | if(BW_in_pkts < 15) |
| 274 | $display("BW_CALC_1G : ERROR BW less than expected for port %0d",port_num); |
| 275 | end |
| 276 | else if(packet_len == 1518) begin |
| 277 | if(BW_in_pkts < 0.8) |
| 278 | $display("BW_CALC_1G : ERROR BW less than expected for port %0d",port_num); |
| 279 | end |
| 280 | end |
| 281 | else begin |
| 282 | nxt_state = 2'b11; |
| 283 | ipg_byte_cnt = ipg_byte_cnt + 1; |
| 284 | end |
| 285 | end |
| 286 | else begin |
| 287 | data_byte_cnt = data_byte_cnt + 1; |
| 288 | nxt_state = 2'b10; |
| 289 | end |
| 290 | end |
| 291 | 2'b11 : begin |
| 292 | if(~enb) begin |
| 293 | nxt_state = 2'b11; |
| 294 | ipg_byte_cnt = ipg_byte_cnt + 1; |
| 295 | end |
| 296 | else |
| 297 | nxt_state = 2'b01; |
| 298 | end |
| 299 | endcase |
| 300 | endtask |
| 301 | |
| 302 | |
| 303 | endmodule // bw_calc |
| 304 | |
| 305 | |
| 306 | |