//
// Copyright 2013 Ettus Research LLC
// Copyright 2017 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: LGPL-3.0-or-later
//
// Parameters:
// - DMA_STREAM_WIDTH: Width of the data bus. It'll be a big suprise if this is
// anything other than 64.
// - NUM_TX_STREAMS: Number of TX FIFOs.
// - NUM_RX_STREAMS: Number of RX FIFOs. Note: Despite having two different
// parameters, NUM_TX_STREAMS and NUM_RX_STREAMS need to be
// identical.
`define GET_DMA_BUS(parallel_bus, chan_idx) parallel_bus[(DMA_STREAM_WIDTH*(chan_idx+1))-1:(DMA_STREAM_WIDTH*chan_idx)]
`define GET_FSIZE_BUS(parallel_bus, chan_idx) parallel_bus[(DMA_FRAME_SIZE_WIDTH*(chan_idx+1))-1:(DMA_FRAME_SIZE_WIDTH*chan_idx)]
`define GET_SWAP_BUS(parallel_bus, chan_idx) parallel_bus[(3*(chan_idx+1))-1:(3*chan_idx)]
module x300_pcie_int #(
parameter DMA_STREAM_WIDTH = 64,
parameter NUM_TX_STREAMS = 6,
parameter NUM_RX_STREAMS = 6,
parameter REGPORT_ADDR_WIDTH = 20,
parameter REGPORT_DATA_WIDTH = 32,
parameter IOP2_MSG_WIDTH = 64,
parameter BUS_CLK_RATE = 32'd166666666
) (
//---------------------------------------------------------
// Clocks and Resets
//---------------------------------------------------------
input ioport2_clk,
input bus_clk,
input bus_rst,
//---------------------------------------------------------
// DMA streams to/from Chinch Interface to IoPort2 (Domain: ioport2_clk)
//---------------------------------------------------------
input [(NUM_TX_STREAMS*DMA_STREAM_WIDTH)-1:0] dmatx_tdata_iop2,
input [NUM_TX_STREAMS-1:0] dmatx_tvalid_iop2,
output [NUM_TX_STREAMS-1:0] dmatx_tready_iop2,
output [(NUM_RX_STREAMS*DMA_STREAM_WIDTH)-1:0] dmarx_tdata_iop2,
output [NUM_RX_STREAMS-1:0] dmarx_tvalid_iop2,
input [NUM_RX_STREAMS-1:0] dmarx_tready_iop2,
//---------------------------------------------------------
// DMA stream to/from crossbar (Domain: bus_clk)
//---------------------------------------------------------
output [DMA_STREAM_WIDTH-1:0] dmatx_tdata,
output [2:0] dmatx_tuser,
output dmatx_tvalid,
output dmatx_tlast,
input dmatx_tready,
input [DMA_STREAM_WIDTH-1:0] dmarx_tdata,
input [2:0] dmarx_tuser,
input dmarx_tvalid,
input dmarx_tlast,
output dmarx_tready,
//---------------------------------------------------------
// PCIe User register port (Domain: ioport2_clk)
//---------------------------------------------------------
input pcie_usr_reg_wr,
input pcie_usr_reg_rd,
input [REGPORT_ADDR_WIDTH-1:0] pcie_usr_reg_addr,
input [REGPORT_DATA_WIDTH-1:0] pcie_usr_reg_data_in,
input [1:0] pcie_usr_reg_len,
output [REGPORT_DATA_WIDTH-1:0] pcie_usr_reg_data_out,
output pcie_usr_reg_rc,
output pcie_usr_reg_rdy,
//---------------------------------------------------------
// PCIe Chinch register port (Domain: ioport2_clk)
//---------------------------------------------------------
output chinch_reg_wr,
output chinch_reg_rd,
output [REGPORT_ADDR_WIDTH-1:0] chinch_reg_addr,
output [REGPORT_DATA_WIDTH-1:0] chinch_reg_data_out,
output [1:0] chinch_reg_len,
input [REGPORT_DATA_WIDTH-1:0] chinch_reg_data_in,
input chinch_reg_rc,
input chinch_reg_rdy,
//---------------------------------------------------------
// Message FIFOs to/from the core logic (Domain: bus_clk)
//---------------------------------------------------------
input [IOP2_MSG_WIDTH-1:0] rego_tdata,
input rego_tvalid,
input rego_tlast,
output rego_tready,
output [IOP2_MSG_WIDTH-1:0] regi_tdata,
output regi_tvalid,
output regi_tlast,
input regi_tready,
//---------------------------------------------------------
// Misc
//---------------------------------------------------------
input [15:0] misc_status,
output [127:0] debug
);
localparam REG_CLK_XING_FIFO_SIZE = 5; //Will synthesize fifo_short_2clk
localparam DMA_CLK_XING_FIFO_SIZE = 5; //Will synthesize fifo_short_2clk
localparam DMA_PKT_GATE_FIFO_SIZE = 11; //Room for 2 8k packets
localparam DMA_FRAME_SIZE_WIDTH = 16;
localparam DMA_RX_DEST_WIDTH = $clog2(NUM_RX_STREAMS);
//*******************************************************************************
// Message FIFO translator + clock crossing
//
wire msgo_tvalid, msgi_tvalid, msgo_tready, msgi_tready;
wire [63:0] msgo_tdata, msgi_tdata;
wire pcie_out_valid, pcie_in_valid;
wire [63:0] pcie_out_msg, pcie_in_msg;
//Link chinch register port and user register port to AXI message FIFOs
wire iop2_rd_response, iop2_wr_request, iop2_rd_request;
wire [31:0] iop2_data;
wire chinch_reg_is_half_word;
ioport2_msg_decode pcie_out_msg_decoder (
.message(pcie_out_msg),
.rd_response(iop2_rd_response), .wr_request(iop2_wr_request), .rd_request(iop2_rd_request), .half_word(chinch_reg_is_half_word),
.address(chinch_reg_addr), .data(iop2_data));
assign chinch_reg_len = chinch_reg_is_half_word ? 2'b01 : 2'b10;
assign pcie_usr_reg_rc = iop2_rd_response & pcie_out_valid;
assign chinch_reg_wr = iop2_wr_request & pcie_out_valid;
assign chinch_reg_rd = iop2_rd_request & pcie_out_valid;
assign chinch_reg_data_out = iop2_data;
assign pcie_usr_reg_data_out = iop2_data;
ioport2_msg_encode pcie_in_msg_encoder (
.rd_response(chinch_reg_rc), .wr_request(pcie_usr_reg_wr), .rd_request(pcie_usr_reg_rd), .half_word(pcie_usr_reg_len == 2'b01),
.address(pcie_usr_reg_addr), .data(chinch_reg_rc ? chinch_reg_data_in : pcie_usr_reg_data_in),
.message(pcie_in_msg));
assign pcie_in_valid = chinch_reg_rc | pcie_usr_reg_wr | pcie_usr_reg_rd;
//Cross from the Ioport2 clock domain to the bus clock domain
axi_fifo_2clk #(.WIDTH(64), .SIZE(REG_CLK_XING_FIFO_SIZE)) pcie_out_msg_fifo (
.reset(bus_rst),
.i_aclk(bus_clk), .i_tdata(msgo_tdata), .i_tvalid(msgo_tvalid), .i_tready(msgo_tready),
.o_aclk(ioport2_clk), .o_tdata(pcie_out_msg), .o_tvalid(pcie_out_valid), .o_tready(chinch_reg_rdy | pcie_usr_reg_rc));
axi_fifo_2clk #(.WIDTH(64), .SIZE(REG_CLK_XING_FIFO_SIZE)) pcie_in_msg_fifo (
.reset(bus_rst),
.i_aclk(ioport2_clk), .i_tdata(pcie_in_msg), .i_tvalid(pcie_in_valid), .i_tready(pcie_usr_reg_rdy),
.o_aclk(bus_clk), .o_tdata(msgi_tdata), .o_tvalid(msgi_tvalid), .o_tready(msgi_tready));
//
//*******************************************************************************
wire [NUM_TX_STREAMS-1:0] dmatx_clear, dmatx_enabled;
wire [NUM_TX_STREAMS-1:0] dmatx_samp_stb, dmatx_pkt_stb, dmatx_busy, dmatx_error;
wire [(NUM_TX_STREAMS*DMA_FRAME_SIZE_WIDTH)-1:0] dmatx_frame_size;
wire [NUM_RX_STREAMS-1:0] dmarx_clear, dmarx_enabled;
wire [NUM_RX_STREAMS-1:0] dmarx_samp_stb, dmarx_pkt_stb, dmarx_busy, dmarx_error;
wire [(NUM_RX_STREAMS*DMA_FRAME_SIZE_WIDTH)-1:0] dmarx_frame_size;
wire [DMA_STREAM_WIDTH-1:0] dmarx_header;
//*******************************************************************************
// PCIe message/register endpoints
//
wire [63:0] basic_regi_tdata, dmatx_regi_tdata, dmarx_regi_tdata;
wire basic_regi_tvalid, dmatx_regi_tvalid, dmarx_regi_tvalid;
wire basic_regi_tready, dmatx_regi_tready, dmarx_regi_tready;
wire [63:0] basic_rego_tdata, dmatx_rego_tdata, dmarx_rego_tdata;
wire basic_rego_tvalid, dmatx_rego_tvalid, dmarx_rego_tvalid;
wire basic_rego_tready, dmatx_rego_tready, dmarx_rego_tready;
pcie_iop2_msg_arbiter #(
//(DO NOT USE) //0x00000 - 0x3FFFC: Reserved LVFPGA Core Space
.E0_ADDR(20'h40000), .E0_MASK(20'hFFE00), //0x40000 - 0x401FC: Basic PCIe registers
.E1_ADDR(20'h40200), .E1_MASK(20'hFFE00), //0x40200 - 0x403FC: TX DMA Config/Readback registers
.E2_ADDR(20'h40400), .E2_MASK(20'hFFE00), //0x40400 - 0x405FC: RX DMA Config/Readback registers
.E3_ADDR(20'h60000), .E3_MASK(20'hE0000) //0x60000 - 0x7FFFC: Client address space
) iop2_msg_arbiter (
.clk(bus_clk), .reset(bus_rst),
//Master
.regi_tdata(msgi_tdata), .regi_tvalid(msgi_tvalid), .regi_tready(msgi_tready),
.rego_tdata(msgo_tdata), .rego_tvalid(msgo_tvalid), .rego_tready(msgo_tready),
//Endpoint 0
.e0_regi_tdata(basic_regi_tdata), .e0_regi_tvalid(basic_regi_tvalid), .e0_regi_tready(basic_regi_tready),
.e0_rego_tdata(basic_rego_tdata), .e0_rego_tvalid(basic_rego_tvalid), .e0_rego_tready(basic_rego_tready),
//Endpoint 1
.e1_regi_tdata(dmatx_regi_tdata), .e1_regi_tvalid(dmatx_regi_tvalid), .e1_regi_tready(dmatx_regi_tready),
.e1_rego_tdata(dmatx_rego_tdata), .e1_rego_tvalid(dmatx_rego_tvalid), .e1_rego_tready(dmatx_rego_tready),
//Endpoint 2
.e2_regi_tdata(dmarx_regi_tdata), .e2_regi_tvalid(dmarx_regi_tvalid), .e2_regi_tready(dmarx_regi_tready),
.e2_rego_tdata(dmarx_rego_tdata), .e2_rego_tvalid(dmarx_rego_tvalid), .e2_rego_tready(dmarx_rego_tready),
//Endpoint 3
.e3_regi_tdata(regi_tdata), .e3_regi_tvalid(regi_tvalid), .e3_regi_tready(regi_tready),
.e3_rego_tdata(rego_tdata), .e3_rego_tvalid(rego_tvalid), .e3_rego_tready(rego_tready)
);
assign regi_tlast = regi_tvalid;
wire [15:0] fpga_status;
assign fpga_status[7:0] = {|(dmatx_error), 1'b0, dmatx_enabled};
assign fpga_status[15:8] = {|(dmarx_error), 1'b0, dmarx_enabled};
pcie_basic_regs #(
.SIGNATURE(32'h58333030 /*ASCII:"X300"*/), .CLK_FREQ(BUS_CLK_RATE)
) basic_regs (
.clk(bus_clk), .reset(bus_rst),
.regi_tdata(basic_regi_tdata), .regi_tvalid(basic_regi_tvalid), .regi_tready(basic_regi_tready),
.rego_tdata(basic_rego_tdata), .rego_tvalid(basic_rego_tvalid), .rego_tready(basic_rego_tready),
.misc_status({fpga_status, misc_status})
);
pcie_dma_ctrl #(
.NUM_STREAMS(NUM_TX_STREAMS), .FRAME_SIZE_W(DMA_FRAME_SIZE_WIDTH),
.REG_BASE_ADDR(20'h40200), .ENABLE_ROUTER(0)
) tx_dma_ctrl_regs (
.clk(bus_clk), .reset(bus_rst),
.regi_tdata(dmatx_regi_tdata), .regi_tvalid(dmatx_regi_tvalid), .regi_tready(dmatx_regi_tready),
.rego_tdata(dmatx_rego_tdata), .rego_tvalid(dmatx_rego_tvalid), .rego_tready(dmatx_rego_tready),
.set_enabled(dmatx_enabled), .set_clear(dmatx_clear), .set_frame_size(dmatx_frame_size),
.sample_stb(dmatx_samp_stb), .packet_stb(dmatx_pkt_stb),
.stream_busy(dmatx_busy), .stream_err(dmatx_error), .rtr_sid(8'h00), .rtr_dst()
);
pcie_dma_ctrl #(
.NUM_STREAMS(NUM_RX_STREAMS), .FRAME_SIZE_W(DMA_FRAME_SIZE_WIDTH),
.REG_BASE_ADDR(20'h40400), .ENABLE_ROUTER(0)
) rx_dma_ctrl_regs (
.clk(bus_clk), .reset(bus_rst),
.regi_tdata(dmarx_regi_tdata), .regi_tvalid(dmarx_regi_tvalid), .regi_tready(dmarx_regi_tready),
.rego_tdata(dmarx_rego_tdata), .rego_tvalid(dmarx_rego_tvalid), .rego_tready(dmarx_rego_tready),
.set_enabled(dmarx_enabled), .set_clear(dmarx_clear), .set_frame_size(dmarx_frame_size),
.sample_stb(dmarx_samp_stb), .packet_stb(dmarx_pkt_stb),
.stream_busy(dmarx_busy), .stream_err(dmarx_error), .rtr_sid(8'h00), .rtr_dst()
);
//
//*******************************************************************************
//*******************************************************************************
// TX DMA Datapath
//
wire [(NUM_TX_STREAMS*DMA_STREAM_WIDTH)-1:0] dmatx_tdata_bclk, dmatx_tdata_in, dmatx_tdata_trun, dmatx_tdata_gt, dmatx_tdata_swap;
wire [NUM_TX_STREAMS-1:0] dmatx_tvalid_bclk, dmatx_tvalid_in, dmatx_tvalid_trun, dmatx_tvalid_gt;
wire [NUM_TX_STREAMS-1:0] dmatx_tready_bclk, dmatx_tready_in, dmatx_tready_trun, dmatx_tready_gt;
wire [NUM_TX_STREAMS-1:0] dmatx_tlast_trun, dmatx_tlast_gt;
// Output of the axi_mux8
wire [DMA_STREAM_WIDTH-1:0] dmatx_tdata_mux;
wire [DMA_RX_DEST_WIDTH-1:0] dmatx_tuser_mux;
wire dmatx_tvalid_mux, dmatx_tlast_mux, dmatx_tready_mux;
genvar i;
generate
for (i=0; i<NUM_TX_STREAMS; i=i+1) begin: tx_dma_stuff_generator
axi_fifo_2clk #(.WIDTH(DMA_STREAM_WIDTH), .SIZE(DMA_CLK_XING_FIFO_SIZE)) tx_dma_clock_crossing_fifo (
.reset(bus_rst),
.i_aclk(ioport2_clk), .i_tdata(`GET_DMA_BUS(dmatx_tdata_iop2,i)), .i_tvalid(dmatx_tvalid_iop2[i]), .i_tready(dmatx_tready_iop2[i]),
.o_aclk(bus_clk), .o_tdata(`GET_DMA_BUS(dmatx_tdata_bclk,i)), .o_tvalid(dmatx_tvalid_bclk[i]), .o_tready(dmatx_tready_bclk[i])
);
pcie_lossy_samp_gate tx_samp_gate (
.i_tdata(`GET_DMA_BUS(dmatx_tdata_bclk,i)), .i_tvalid(dmatx_tvalid_bclk[i]), .i_tready(dmatx_tready_bclk[i]),
.o_tdata(`GET_DMA_BUS(dmatx_tdata_in,i)), .o_tvalid(dmatx_tvalid_in[i]), .o_tready(dmatx_tready_in[i]),
.drop(~dmatx_enabled[i]), .dropping(dmatx_busy[i])
);
chdr_dechunker tx_dma_dechunker (
.clk(bus_clk), .reset(bus_rst), .clear(dmatx_clear[i]), .frame_size(`GET_FSIZE_BUS(dmatx_frame_size, i)),
.i_tdata(`GET_DMA_BUS(dmatx_tdata_in,i)), .i_tvalid(dmatx_tvalid_in[i]), .i_tready(dmatx_tready_in[i]),
.o_tdata(`GET_DMA_BUS(dmatx_tdata_trun,i)), .o_tlast(dmatx_tlast_trun[i]), .o_tvalid(dmatx_tvalid_trun[i]), .o_tready(dmatx_tready_trun[i]),
.error(dmatx_error[i])
);
assign dmatx_samp_stb[i] = dmatx_tvalid_trun[i] & dmatx_tready_trun[i];
assign dmatx_pkt_stb[i] = dmatx_samp_stb[i] & dmatx_tlast_trun[i];
axi_packet_gate #(.WIDTH(DMA_STREAM_WIDTH), .SIZE(DMA_PKT_GATE_FIFO_SIZE)) vita_chdr_gate (
.clk(bus_clk), .reset(bus_rst), .clear(dmatx_clear[i]),
.i_tdata(`GET_DMA_BUS(dmatx_tdata_trun,i)), .i_tlast(dmatx_tlast_trun[i]), .i_tvalid(dmatx_tvalid_trun[i]), .i_tready(dmatx_tready_trun[i]),
.i_terror(dmatx_error[i]),
.o_tdata(`GET_DMA_BUS(dmatx_tdata_gt,i)), .o_tlast(dmatx_tlast_gt[i]), .o_tvalid(dmatx_tvalid_gt[i]), .o_tready(dmatx_tready_gt[i])
);
end
endgenerate
// [DrB] The following transport adapter requires a tuser input with the DMA
// channel. Neither axi_mux8 nor axi_fifo_flop2 support tuser at the time of
// this modification, and to reduce the risk we will simply widen tdata and
// include the tuser value in there.
axi_mux8 #(.PRIO(0), .WIDTH(DMA_STREAM_WIDTH+DMA_RX_DEST_WIDTH)) output_dma_mux (
.clk(bus_clk), .reset(bus_rst), .clear(|(dmatx_clear)),
.i0_tdata({3'd0, `GET_DMA_BUS(dmatx_tdata_gt,0)}), .i0_tlast(dmatx_tlast_gt[0]), .i0_tvalid(dmatx_tvalid_gt[0]), .i0_tready(dmatx_tready_gt[0]),
.i1_tdata({3'd1, `GET_DMA_BUS(dmatx_tdata_gt,1)}), .i1_tlast(dmatx_tlast_gt[1]), .i1_tvalid(dmatx_tvalid_gt[1]), .i1_tready(dmatx_tready_gt[1]),
.i2_tdata({3'd2, `GET_DMA_BUS(dmatx_tdata_gt,2)}), .i2_tlast(dmatx_tlast_gt[2]), .i2_tvalid(dmatx_tvalid_gt[2]), .i2_tready(dmatx_tready_gt[2]),
.i3_tdata({3'd3, `GET_DMA_BUS(dmatx_tdata_gt,3)}), .i3_tlast(dmatx_tlast_gt[3]), .i3_tvalid(dmatx_tvalid_gt[3]), .i3_tready(dmatx_tready_gt[3]),
.i4_tdata({3'd4, `GET_DMA_BUS(dmatx_tdata_gt,4)}), .i4_tlast(dmatx_tlast_gt[4]), .i4_tvalid(dmatx_tvalid_gt[4]), .i4_tready(dmatx_tready_gt[4]),
.i5_tdata({3'd5, `GET_DMA_BUS(dmatx_tdata_gt,5)}), .i5_tlast(dmatx_tlast_gt[5]), .i5_tvalid(dmatx_tvalid_gt[5]), .i5_tready(dmatx_tready_gt[5]),
.i6_tdata({3'd6, 0}), .i6_tlast(1'b0), .i6_tvalid(1'b0), .i6_tready(),
.i7_tdata({3'd7, 0}), .i7_tlast(1'b0), .i7_tvalid(1'b0), .i7_tready(),
.o_tdata({dmatx_tuser_mux, dmatx_tdata_mux}),
.o_tlast(dmatx_tlast_mux), .o_tvalid(dmatx_tvalid_mux), .o_tready(dmatx_tready_mux)
);
axi_fifo_flop2 #(.WIDTH(DMA_STREAM_WIDTH+1+DMA_RX_DEST_WIDTH)) tx_pipeline_reg (
.clk(bus_clk), .reset(bus_rst), .clear(|(dmatx_clear)),
.i_tdata({dmatx_tuser_mux, dmatx_tlast_mux, dmatx_tdata_mux}),
.i_tvalid(dmatx_tvalid_mux), .i_tready(dmatx_tready_mux),
.o_tdata({dmatx_tuser, dmatx_tlast, dmatx_tdata}),
.o_tvalid(dmatx_tvalid), .o_tready(dmatx_tready),
.space(), .occupied());
//
//*******************************************************************************
//*******************************************************************************
// RX DMA Datapath
//
wire [(NUM_RX_STREAMS*DMA_STREAM_WIDTH)-1:0] dmarx_tdata_bclk, dmarx_tdata_pad, dmarx_tdata_swap, dmarx_tdata_out;
wire [NUM_RX_STREAMS-1:0] dmarx_tvalid_bclk, dmarx_tvalid_pad, dmarx_tvalid_out;
wire [NUM_RX_STREAMS-1:0] dmarx_tready_bclk, dmarx_tready_pad, dmarx_tready_out;
wire [NUM_RX_STREAMS-1:0] dmarx_tlast_bclk, dmarx_tlast_pad, dmarx_tlast_out;
wire [DMA_STREAM_WIDTH-1:0] dmarx_tdata_mux;
wire [DMA_RX_DEST_WIDTH-1:0] dmarx_tuser_mux;
wire dmarx_tvalid_mux, dmarx_tlast_mux, dmarx_tready_mux;
axi_fifo_flop2 #(.WIDTH(DMA_STREAM_WIDTH+1+DMA_RX_DEST_WIDTH)) rx_pipeline_reg (
.clk(bus_clk), .reset(bus_rst), .clear(|(dmarx_clear)),
.i_tdata({dmarx_tuser, dmarx_tlast, dmarx_tdata}),
.i_tvalid(dmarx_tvalid), .i_tready(dmarx_tready),
.o_tdata({dmarx_tuser_mux, dmarx_tlast_mux, dmarx_tdata_mux}),
.o_tvalid(dmarx_tvalid_mux), .o_tready(dmarx_tready_mux),
.space(), .occupied());
axi_demux8 #(.ACTIVE_CHAN(8'b00111111), .WIDTH(DMA_STREAM_WIDTH)) input_dma_demux (
.clk(bus_clk), .reset(bus_rst), .clear(|(dmarx_clear)),
.header(), .dest(dmarx_tuser_mux),
.i_tdata(dmarx_tdata_mux), .i_tlast(dmarx_tlast_mux), .i_tvalid(dmarx_tvalid_mux), .i_tready(dmarx_tready_mux),
.o0_tdata(`GET_DMA_BUS(dmarx_tdata_bclk,0)), .o0_tlast(dmarx_tlast_bclk[0]), .o0_tvalid(dmarx_tvalid_bclk[0]), .o0_tready(dmarx_tready_bclk[0]),
.o1_tdata(`GET_DMA_BUS(dmarx_tdata_bclk,1)), .o1_tlast(dmarx_tlast_bclk[1]), .o1_tvalid(dmarx_tvalid_bclk[1]), .o1_tready(dmarx_tready_bclk[1]),
.o2_tdata(`GET_DMA_BUS(dmarx_tdata_bclk,2)), .o2_tlast(dmarx_tlast_bclk[2]), .o2_tvalid(dmarx_tvalid_bclk[2]), .o2_tready(dmarx_tready_bclk[2]),
.o3_tdata(`GET_DMA_BUS(dmarx_tdata_bclk,3)), .o3_tlast(dmarx_tlast_bclk[3]), .o3_tvalid(dmarx_tvalid_bclk[3]), .o3_tready(dmarx_tready_bclk[3]),
.o4_tdata(`GET_DMA_BUS(dmarx_tdata_bclk,4)), .o4_tlast(dmarx_tlast_bclk[4]), .o4_tvalid(dmarx_tvalid_bclk[4]), .o4_tready(dmarx_tready_bclk[4]),
.o5_tdata(`GET_DMA_BUS(dmarx_tdata_bclk,5)), .o5_tlast(dmarx_tlast_bclk[5]), .o5_tvalid(dmarx_tvalid_bclk[5]), .o5_tready(dmarx_tready_bclk[5]),
.o6_tdata(), .o6_tlast(), .o6_tvalid(), .o6_tready(1'b0), //Unused port
.o7_tdata(), .o7_tlast(), .o7_tvalid(), .o7_tready(1'b0) //Unused port
);
genvar j;
generate
for (j=0; j<NUM_RX_STREAMS; j=j+1) begin: rx_dma_stuff_generator
assign dmarx_samp_stb[j] = dmarx_tvalid_bclk[j] & dmarx_tready_bclk[j];
assign dmarx_pkt_stb[j] = dmarx_samp_stb[j] & dmarx_tlast_bclk[j];
chdr_chunker rx_dma_chunker (
.clk(bus_clk), .reset(bus_rst), .clear(dmarx_clear[j]), .frame_size(`GET_FSIZE_BUS(dmarx_frame_size, j)),
.i_tdata(`GET_DMA_BUS(dmarx_tdata_bclk,j)), .i_tlast(dmarx_tlast_bclk[j]), .i_tvalid(dmarx_tvalid_bclk[j]), .i_tready(dmarx_tready_bclk[j]),
.o_tdata(`GET_DMA_BUS(dmarx_tdata_pad,j)), .o_tlast(dmarx_tlast_pad[j]), .o_tvalid(dmarx_tvalid_pad[j]), .o_tready(dmarx_tready_pad[j]),
.error(dmarx_error[j])
);
pcie_lossy_samp_gate rx_samp_gate (
.i_tdata(`GET_DMA_BUS(dmarx_tdata_pad,j)), .i_tvalid(dmarx_tvalid_pad[j]), .i_tready(dmarx_tready_pad[j]),
.o_tdata(`GET_DMA_BUS(dmarx_tdata_out,j)), .o_tvalid(dmarx_tvalid_out[j]), .o_tready(dmarx_tready_out[j]),
.drop(~dmarx_enabled[j]), .dropping(dmarx_busy[j])
);
axi_fifo_2clk #(.WIDTH(DMA_STREAM_WIDTH), .SIZE(DMA_CLK_XING_FIFO_SIZE)) rx_dma_clock_crossing_fifo (
.reset(bus_rst),
.i_aclk(bus_clk), .i_tdata(`GET_DMA_BUS(dmarx_tdata_out,j)), .i_tvalid(dmarx_tvalid_out[j]), .i_tready(dmarx_tready_out[j]),
.o_aclk(ioport2_clk), .o_tdata(`GET_DMA_BUS(dmarx_tdata_iop2,j)), .o_tvalid(dmarx_tvalid_iop2[j]), .o_tready(dmarx_tready_iop2[j])
);
end
endgenerate
//
//*******************************************************************************
endmodule // x300_pcie_int
`undef GET_DMA_BUS
`undef GET_FSIZE_BUS
`undef GET_SWAP_BUS