Subversion Repositories pcie_sg_dma

 
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//-----------------------------------------------------------------------------
// Project    : Virtex-6 Integrated Block for PCI Express
// File       : pcie_bram_top_v6.v
// Version    : 1.7
//--
//-- Description: BlockRAM top level module for Virtex6 PCIe Block
//--
//--
//--
//--------------------------------------------------------------------------------
 
`timescale 1ns/1ns
 
module pcie_bram_top_v6
#(
   parameter DEV_CAP_MAX_PAYLOAD_SUPPORTED = 0,
 
   parameter VC0_TX_LASTPACKET         = 31,
   parameter TLM_TX_OVERHEAD           = 24,
   parameter TL_TX_RAM_RADDR_LATENCY   = 1,
   parameter TL_TX_RAM_RDATA_LATENCY   = 2,
   parameter TL_TX_RAM_WRITE_LATENCY   = 1,
 
   parameter VC0_RX_LIMIT              = 'h1FFF,
   parameter TL_RX_RAM_RADDR_LATENCY   = 1,
   parameter TL_RX_RAM_RDATA_LATENCY   = 2,
   parameter TL_RX_RAM_WRITE_LATENCY   = 1
)
  (
   input          user_clk_i,
   input          reset_i,
 
   input          mim_tx_wen,
   input  [12:0]  mim_tx_waddr,
   input  [71:0]  mim_tx_wdata,
   input          mim_tx_ren,
   input          mim_tx_rce,
   input  [12:0]  mim_tx_raddr,
   output [71:0]  mim_tx_rdata,
 
   input          mim_rx_wen,
   input  [12:0]  mim_rx_waddr,
   input  [71:0]  mim_rx_wdata,
   input          mim_rx_ren,
   input          mim_rx_rce,
   input  [12:0]  mim_rx_raddr,
   output [71:0]  mim_rx_rdata
   );
 
   // TX calculations
   localparam MPS_BYTES = ((DEV_CAP_MAX_PAYLOAD_SUPPORTED == 0) ? 128 :
                           (DEV_CAP_MAX_PAYLOAD_SUPPORTED == 1) ? 256 :
                           (DEV_CAP_MAX_PAYLOAD_SUPPORTED == 2) ? 512 :
                                                                 1024 );
 
   localparam BYTES_TX = (VC0_TX_LASTPACKET + 1) * (MPS_BYTES + TLM_TX_OVERHEAD);
 
   localparam ROWS_TX = 1;
   localparam COLS_TX = ((BYTES_TX <= 4096) ?  1 : 
                         (BYTES_TX <= 8192) ?  2 : 
                         (BYTES_TX <= 16384) ? 4 : 
                         (BYTES_TX <= 32768) ? 8 :
                                              18
                        );
 
   // RX calculations
   localparam ROWS_RX = 1;
 
   localparam COLS_RX = ((VC0_RX_LIMIT < 'h0200) ? 1 :
			 (VC0_RX_LIMIT < 'h0400) ? 2 :
			 (VC0_RX_LIMIT < 'h0800) ? 4 :
			 (VC0_RX_LIMIT < 'h1000) ? 8 :
                                                  18
                        );
 
   initial begin
      $display("[%t] %m ROWS_TX %0d COLS_TX %0d", $time, ROWS_TX, COLS_TX);
      $display("[%t] %m ROWS_RX %0d COLS_RX %0d", $time, ROWS_RX, COLS_RX);
   end
 
   pcie_brams_v6 #(.NUM_BRAMS        (COLS_TX), 
                   .RAM_RADDR_LATENCY(TL_TX_RAM_RADDR_LATENCY),
                   .RAM_RDATA_LATENCY(TL_TX_RAM_RDATA_LATENCY),
                   .RAM_WRITE_LATENCY(TL_TX_RAM_WRITE_LATENCY))
   pcie_brams_tx
   (
    .user_clk_i(user_clk_i),
    .reset_i(reset_i),
 
    .waddr(mim_tx_waddr),
    .wen(mim_tx_wen),
    .ren(mim_tx_ren),
    .rce(mim_tx_rce),
    .wdata(mim_tx_wdata),
    .raddr(mim_tx_raddr),
    .rdata(mim_tx_rdata)
   );
 
   pcie_brams_v6 #(.NUM_BRAMS        (COLS_RX), 
                   .RAM_RADDR_LATENCY(TL_RX_RAM_RADDR_LATENCY), 
                   .RAM_RDATA_LATENCY(TL_RX_RAM_RDATA_LATENCY), 
                   .RAM_WRITE_LATENCY(TL_RX_RAM_WRITE_LATENCY))
   pcie_brams_rx
   (
    .user_clk_i(user_clk_i),
    .reset_i(reset_i),
 
    .waddr(mim_rx_waddr),
    .wen(mim_rx_wen),
    .ren(mim_rx_ren),
    .rce(mim_rx_rce),
    .wdata(mim_rx_wdata),
    .raddr(mim_rx_raddr),
    .rdata(mim_rx_rdata)
   );
 
endmodule // pcie_bram_top