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riffa/fpga/riffa_hdl/txr_engine_classic.v

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// ----------------------------------------------------------------------
// Copyright (c) 2015, The Regents of the University of California All
// rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
//
// * Neither the name of The Regents of the University of California
// nor the names of its contributors may be used to endorse or
// promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL REGENTS OF THE
// UNIVERSITY OF CALIFORNIA BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
// TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
// USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
// DAMAGE.
// ----------------------------------------------------------------------
//----------------------------------------------------------------------------
// Filename: txc_engine_classic.v
// Version: 1.0
// Verilog Standard: Verilog-2001
// Description: The TXR Engine takes unformatted completions, formats
// these packets into "TLP's" or Transaction Layer Packets. These packets must
// meet max-request, max-payload, and payload termination requirements (see Read
// Completion Boundary). The TXR Engine does not check these requirements during
// operation, but may do so during simulation. This Engine is capable of
// operating at "line rate". This file also contains the txr_formatter module,
// which formats request headers.
// Author: Dustin Richmond (@darichmond)
//-----------------------------------------------------------------------------
`timescale 1ns/1ns
`include "trellis.vh" // Defines the user-facing signal widths.
`include "tlp.vh" // Defines the endpoint-facing field widths in a TLP
module txr_engine_classic
#(parameter C_PCI_DATA_WIDTH = 128,
parameter C_PIPELINE_INPUT = 1,
parameter C_PIPELINE_OUTPUT = 0,
parameter C_MAX_PAYLOAD_DWORDS = 64,
parameter C_DEPTH_PACKETS = 10,
parameter C_VENDOR = "ALTERA")
(// Interface: Clocks
input CLK,
// Interface: Resets
input RST_IN, // Addition for RIFFA_RST
output DONE_TXR_RST,
// Interface: Configuration
input [`SIG_CPLID_W-1:0] CONFIG_COMPLETER_ID,
// Interface: TXR Classic
input TXR_TLP_READY,
output [C_PCI_DATA_WIDTH-1:0] TXR_TLP,
output TXR_TLP_VALID,
output TXR_TLP_START_FLAG,
output [clog2s(C_PCI_DATA_WIDTH/32)-1:0] TXR_TLP_START_OFFSET,
output TXR_TLP_END_FLAG,
output [clog2s(C_PCI_DATA_WIDTH/32)-1:0] TXR_TLP_END_OFFSET,
// Interface: TXR Engine
input TXR_DATA_VALID,
input [C_PCI_DATA_WIDTH-1:0] TXR_DATA,
input TXR_DATA_START_FLAG,
input [clog2s(C_PCI_DATA_WIDTH/32)-1:0] TXR_DATA_START_OFFSET,
input TXR_DATA_END_FLAG,
input [clog2s(C_PCI_DATA_WIDTH/32)-1:0] TXR_DATA_END_OFFSET,
output TXR_DATA_READY,
input TXR_META_VALID,
input [`SIG_FBE_W-1:0] TXR_META_FDWBE,
input [`SIG_LBE_W-1:0] TXR_META_LDWBE,
input [`SIG_ADDR_W-1:0] TXR_META_ADDR,
input [`SIG_LEN_W-1:0] TXR_META_LENGTH,
input [`SIG_TAG_W-1:0] TXR_META_TAG,
input [`SIG_TC_W-1:0] TXR_META_TC,
input [`SIG_ATTR_W-1:0] TXR_META_ATTR,
input [`SIG_TYPE_W-1:0] TXR_META_TYPE,
input TXR_META_EP,
output TXR_META_READY
);
localparam C_DATA_WIDTH = C_PCI_DATA_WIDTH;
localparam C_MAX_HDR_WIDTH = `TLP_MAXHDR_W;
localparam C_MAX_ALIGN_WIDTH = (C_VENDOR == "ALTERA") ? 32:
(C_VENDOR == "XILINX") ? 0 :
0;
localparam C_PIPELINE_FORMATTER_INPUT = C_PIPELINE_INPUT;
localparam C_PIPELINE_FORMATTER_OUTPUT = C_PIPELINE_OUTPUT;
localparam C_FORMATTER_DELAY = C_PIPELINE_FORMATTER_OUTPUT + C_PIPELINE_FORMATTER_INPUT;
/*AUTOWIRE*/
/*AUTOINPUT*/
///*AUTOOUTPUT*/
wire wTxHdrReady;
wire wTxHdrValid;
wire [C_MAX_HDR_WIDTH-1:0] wTxHdr;
wire [`SIG_TYPE_W-1:0] wTxType;
wire [`SIG_NONPAY_W-1:0] wTxHdrNonpayLen;
wire [`SIG_PACKETLEN_W-1:0] wTxHdrPacketLen;
wire [`SIG_LEN_W-1:0] wTxHdrPayloadLen;
wire wTxHdrNopayload;
assign DONE_TXR_RST = ~RST_IN;
txr_formatter_classic
#(
.C_PIPELINE_OUTPUT (C_PIPELINE_FORMATTER_OUTPUT),
.C_PIPELINE_INPUT (C_PIPELINE_FORMATTER_INPUT),
/*AUTOINSTPARAM*/
// Parameters
.C_PCI_DATA_WIDTH (C_PCI_DATA_WIDTH),
.C_MAX_HDR_WIDTH (C_MAX_HDR_WIDTH),
.C_MAX_ALIGN_WIDTH (C_MAX_ALIGN_WIDTH),
.C_VENDOR (C_VENDOR))
txr_formatter_inst
(
// Outputs
.TX_HDR_VALID (wTxHdrValid),
.TX_HDR (wTxHdr[C_MAX_HDR_WIDTH-1:0]),
.TX_HDR_NOPAYLOAD (wTxHdrNopayload),
.TX_HDR_PAYLOAD_LEN (wTxHdrPayloadLen[`SIG_LEN_W-1:0]),
.TX_HDR_NONPAY_LEN (wTxHdrNonpayLen[`SIG_NONPAY_W-1:0]),
.TX_HDR_PACKET_LEN (wTxHdrPacketLen[`SIG_PACKETLEN_W-1:0]),
// Inputs
.TX_HDR_READY (wTxHdrReady),
/*AUTOINST*/
// Outputs
.TXR_META_READY (TXR_META_READY),
// Inputs
.CLK (CLK),
.RST_IN (RST_IN),
.CONFIG_COMPLETER_ID (CONFIG_COMPLETER_ID[`SIG_CPLID_W-1:0]),
.TXR_META_VALID (TXR_META_VALID),
.TXR_META_FDWBE (TXR_META_FDWBE[`SIG_FBE_W-1:0]),
.TXR_META_LDWBE (TXR_META_LDWBE[`SIG_LBE_W-1:0]),
.TXR_META_ADDR (TXR_META_ADDR[`SIG_ADDR_W-1:0]),
.TXR_META_LENGTH (TXR_META_LENGTH[`SIG_LEN_W-1:0]),
.TXR_META_TAG (TXR_META_TAG[`SIG_TAG_W-1:0]),
.TXR_META_TC (TXR_META_TC[`SIG_TC_W-1:0]),
.TXR_META_ATTR (TXR_META_ATTR[`SIG_ATTR_W-1:0]),
.TXR_META_TYPE (TXR_META_TYPE[`SIG_TYPE_W-1:0]),
.TXR_META_EP (TXR_META_EP));
tx_engine
#(
.C_DATA_WIDTH (C_PCI_DATA_WIDTH),
/*AUTOINSTPARAM*/
// Parameters
.C_DEPTH_PACKETS (C_DEPTH_PACKETS),
.C_PIPELINE_INPUT (C_PIPELINE_INPUT),
.C_PIPELINE_OUTPUT (C_PIPELINE_OUTPUT),
.C_FORMATTER_DELAY (C_FORMATTER_DELAY),
.C_MAX_HDR_WIDTH (C_MAX_HDR_WIDTH),
.C_MAX_PAYLOAD_DWORDS (C_MAX_PAYLOAD_DWORDS),
.C_VENDOR (C_VENDOR))
txr_engine_inst
(
// Outputs
.TX_HDR_READY (wTxHdrReady),
.TX_DATA_READY (TXR_DATA_READY),
.TX_PKT (TXR_TLP[C_DATA_WIDTH-1:0]),
.TX_PKT_START_FLAG (TXR_TLP_START_FLAG),
.TX_PKT_START_OFFSET (TXR_TLP_START_OFFSET[clog2s(C_DATA_WIDTH/32)-1:0]),
.TX_PKT_END_FLAG (TXR_TLP_END_FLAG),
.TX_PKT_END_OFFSET (TXR_TLP_END_OFFSET[clog2s(C_DATA_WIDTH/32)-1:0]),
.TX_PKT_VALID (TXR_TLP_VALID),
// Inputs
.TX_HDR_VALID (wTxHdrValid),
.TX_HDR (wTxHdr[C_MAX_HDR_WIDTH-1:0]),
.TX_HDR_NOPAYLOAD (wTxHdrNopayload),
.TX_HDR_PAYLOAD_LEN (wTxHdrPayloadLen[`SIG_LEN_W-1:0]),
.TX_HDR_NONPAY_LEN (wTxHdrNonpayLen[`SIG_NONPAY_W-1:0]),
.TX_HDR_PACKET_LEN (wTxHdrPacketLen[`SIG_PACKETLEN_W-1:0]),
.TX_DATA_VALID (TXR_DATA_VALID),
.TX_DATA (TXR_DATA[C_DATA_WIDTH-1:0]),
.TX_DATA_START_FLAG (TXR_DATA_START_FLAG),
.TX_DATA_START_OFFSET (TXR_DATA_START_OFFSET[clog2s(C_DATA_WIDTH/32)-1:0]),
.TX_DATA_END_FLAG (TXR_DATA_END_FLAG),
.TX_DATA_END_OFFSET (TXR_DATA_END_OFFSET[clog2s(C_DATA_WIDTH/32)-1:0]),
.TX_PKT_READY (TXR_TLP_READY),
/*AUTOINST*/
// Inputs
.CLK (CLK),
.RST_IN (RST_IN));
endmodule
module txr_formatter_classic
#(
parameter C_PCI_DATA_WIDTH = 128,
parameter C_MAX_HDR_WIDTH = `TLP_MAXHDR_W,
parameter C_MAX_ALIGN_WIDTH = 32,
parameter C_PIPELINE_INPUT = 1,
parameter C_PIPELINE_OUTPUT = 1,
parameter C_VENDOR = "ALTERA"
)
(
// Interface: Clocks
input CLK,
// Interface: Resets
input RST_IN,
// Interface: Configuration
input [`SIG_CPLID_W-1:0] CONFIG_COMPLETER_ID,
// Interface: TXR
input TXR_META_VALID,
input [`SIG_FBE_W-1:0] TXR_META_FDWBE,
input [`SIG_LBE_W-1:0] TXR_META_LDWBE,
input [`SIG_ADDR_W-1:0] TXR_META_ADDR,
input [`SIG_LEN_W-1:0] TXR_META_LENGTH,
input [`SIG_TAG_W-1:0] TXR_META_TAG,
input [`SIG_TC_W-1:0] TXR_META_TC,
input [`SIG_ATTR_W-1:0] TXR_META_ATTR,
input [`SIG_TYPE_W-1:0] TXR_META_TYPE,
input TXR_META_EP,
output TXR_META_READY,
// Interface: TX HDR
output TX_HDR_VALID,
output [C_MAX_HDR_WIDTH-1:0] TX_HDR,
output [`SIG_LEN_W-1:0] TX_HDR_PAYLOAD_LEN,
output [`SIG_NONPAY_W-1:0] TX_HDR_NONPAY_LEN,
output [`SIG_PACKETLEN_W-1:0] TX_HDR_PACKET_LEN,
output TX_HDR_NOPAYLOAD,
input TX_HDR_READY
);
wire wWrReq;
wire [`TLP_FMT_W-1:0] wHdrLoFmt;
wire [63:0] wHdrLo;
wire [63:0] _wTxHdr;
wire wTxHdrReady;
wire wTxHdrValid;
wire [(`TLP_REQADDR_W/2)-1:0] wTxHdrAddr[1:0];
wire [(`TLP_REQADDR_W/2)-1:0] wTxHdrAddrDW0;
wire wTxHdr4DW;
wire wTxHdrAlignmentNeeded;
wire [C_MAX_HDR_WIDTH-1:0] wTxHdr;
wire [`SIG_TYPE_W-1:0] wTxType;
wire [`SIG_NONPAY_W-1:0] wTxHdrNonpayLen;
wire [`SIG_PACKETLEN_W-1:0] wTxHdrPacketLen;
wire [`SIG_LEN_W-1:0] wTxHdrPayloadLen;
wire wTxHdrNopayload;
assign wHdrLoFmt = {1'b0, TXR_META_TYPE[`TRLS_TYPE_PAY_I],1'bx};
// Reserved Fields
assign wHdrLo[`TLP_RSVD0_R] = `TLP_RSVD0_V;
assign wHdrLo[`TLP_ADDRTYPE_R] = `TLP_ADDRTYPE_W'b0;
assign wHdrLo[`TLP_TH_R] = `TLP_TH_W'b0;
assign wHdrLo[`TLP_RSVD1_R] = `TLP_RSVD1_V;
assign wHdrLo[`TLP_RSVD2_R] = `TLP_RSVD2_V;
// Generic Header Fields
assign wHdrLo[`TLP_LEN_R] = TXR_META_LENGTH;
assign wHdrLo[`TLP_EP_R] = TXR_META_EP;
assign wHdrLo[`TLP_TD_R] = `TLP_NODIGEST_V;
assign wHdrLo[`TLP_ATTR0_R] = TXR_META_ATTR[1:0];
assign wHdrLo[`TLP_ATTR1_R] = TXR_META_ATTR[2];
assign wHdrLo[`TLP_TYPE_R] = TXR_META_TYPE; // WORKAROUND
assign wHdrLo[`TLP_TC_R] = TXR_META_TC;
assign wHdrLo[`TLP_FMT_R] = wHdrLoFmt;
// Request Specific Fields
assign wHdrLo[`TLP_REQFBE_R] = TXR_META_FDWBE;
assign wHdrLo[`TLP_REQLBE_R] = TXR_META_LDWBE;
assign wHdrLo[`TLP_REQTAG_R] = TXR_META_TAG;
assign wHdrLo[`TLP_REQREQID_R] = CONFIG_COMPLETER_ID;
// Second header formatting stage
assign wTxHdr4DW = wTxHdrAddr[1] != 32'b0;
assign {wTxHdr[`TLP_FMT_R],wTxHdr[`TLP_TYPE_R]} = trellis_to_tlp_type(_wTxHdr[`TLP_TYPE_I +: `SIG_TYPE_W],wTxHdr4DW);
assign wTxHdr[`TLP_TYPE_I-1:0] = _wTxHdr[`TLP_TYPE_I-1:0];
assign wTxHdr[63:32] = _wTxHdr[63:32];
assign wTxHdr[127:64] = {wTxHdrAddr[~wTxHdr4DW],wTxHdrAddr[wTxHdr4DW]};
// Metadata, to the aligner
assign wTxHdrNopayload = ~wTxHdr[`TLP_PAYBIT_I];
assign wTxHdrAddrDW0 = wTxHdrAddr[0];
assign wTxHdrAlignmentNeeded = (wTxHdrAddrDW0[2] == wTxHdr4DW);
assign wTxHdrNonpayLen = {1'b0,{wTxHdr4DW,~wTxHdr4DW,~wTxHdr4DW}} + ((C_VENDOR == "ALTERA") ? {3'b0,(wTxHdrAlignmentNeeded & ~wTxHdrNopayload)}:0);
assign wTxHdrPayloadLen = wTxHdrNopayload ? 0 : wTxHdr[`TLP_LEN_R];
assign wTxHdrPacketLen = wTxHdrPayloadLen + wTxHdrNonpayLen;
pipeline
#(// Parameters
.C_DEPTH (C_PIPELINE_INPUT?1:0),
.C_WIDTH (C_MAX_HDR_WIDTH),
.C_USE_MEMORY (0)
/*AUTOINSTPARAM*/)
input_inst
(// Outputs
.WR_DATA_READY (TXR_META_READY),
.RD_DATA ({wTxHdrAddr[1],wTxHdrAddr[0],_wTxHdr[63:0]}),
.RD_DATA_VALID (wTxHdrValid),
// Inputs
.WR_DATA ({TXR_META_ADDR, wHdrLo}),
.WR_DATA_VALID (TXR_META_VALID),
.RD_DATA_READY (wTxHdrReady),
/*AUTOINST*/
// Inputs
.CLK (CLK),
.RST_IN (RST_IN));
pipeline
#(
// Parameters
.C_DEPTH (C_PIPELINE_OUTPUT?1:0),
.C_WIDTH (C_MAX_HDR_WIDTH+ 1 + `SIG_PACKETLEN_W + `SIG_LEN_W + `SIG_NONPAY_W),
.C_USE_MEMORY (0)
/*AUTOINSTPARAM*/)
output_inst
(
// Outputs
.WR_DATA_READY (wTxHdrReady),
.RD_DATA ({TX_HDR,TX_HDR_NOPAYLOAD,TX_HDR_PACKET_LEN,TX_HDR_PAYLOAD_LEN,TX_HDR_NONPAY_LEN}),
.RD_DATA_VALID (TX_HDR_VALID),
// Inputs
.WR_DATA ({wTxHdr,wTxHdrNopayload,wTxHdrPacketLen,wTxHdrPayloadLen,wTxHdrNonpayLen}),
.WR_DATA_VALID (wTxHdrValid),
.RD_DATA_READY (TX_HDR_READY),
/*AUTOINST*/
// Inputs
.CLK (CLK),
.RST_IN (RST_IN));
endmodule
// Local Variables:
// verilog-library-directories:("." "../../../common/" "../../common/")
// End:
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