Wade Fife
faa360a0f9
This adds variants of the send and recv methods in RfnocBlockCtrlBfm and ChdrIfaceBfm that input/output items instead of CHDR words. Original-commit: aebcaea5eb4e28c5c2a1c78b5e8dd42e5d1247b6
468 lines
18 KiB
Systemverilog
468 lines
18 KiB
Systemverilog
//
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// Copyright 2020 Ettus Research, A National Instruments Company
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//
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// SPDX-License-Identifier: LGPL-3.0-or-later
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//
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// Module: PkgChdrIfaceBfm
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//
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// Description: This package includes a high-level bus functional model (BFM)
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// for the AXIS-CHDR interface of a Transport Adapter or Stream Endpoint.
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//
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package PkgChdrIfaceBfm;
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import PkgChdrUtils::*;
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import PkgChdrBfm::*;
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typedef struct packed {
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chdr_vc_t vc;
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chdr_eob_t eob;
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chdr_eov_t eov;
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bit has_time;
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chdr_timestamp_t timestamp;
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} packet_info_t;
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class ChdrIfaceBfm #(CHDR_W = 64, ITEM_W = 32) extends ChdrBfm #(CHDR_W);
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// Redefine the ChdrPacket and chdr_word_t data types from ChdrBfm due to a
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// bug in Vivado 2019.1.
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typedef ChdrPacket #(CHDR_W) ChdrPacket;
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typedef ChdrData #(CHDR_W, ITEM_W)::chdr_word_t chdr_word_t;
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typedef ChdrData #(CHDR_W, ITEM_W)::item_t item_t;
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localparam int BYTES_PER_CHDR_W = CHDR_W/8;
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localparam int BYTES_PER_ITEM_W = ITEM_W/8;
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chdr_seq_num_t seq_num; // Sequence number
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protected int max_payload_length; // Maximum number of payload bytes per packet
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protected int ticks_per_word; // Timestamp increment per CHDR_W sized word
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// Class constructor to create a new BFM instance.
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//
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// m_chdr: Interface for the master connection (BFM's CHDR output)
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// s_chdr: Interface for the slave connection (BFM's CHDR input)
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//
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function new(
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virtual AxiStreamIf #(CHDR_W).master m_chdr,
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virtual AxiStreamIf #(CHDR_W).slave s_chdr,
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input int max_payload_length = 2**$bits(chdr_length_t),
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input int ticks_per_word = CHDR_W/32
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);
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super.new(m_chdr, s_chdr);
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this.seq_num = 0;
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set_max_payload_length(max_payload_length);
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set_ticks_per_word(ticks_per_word);
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endfunction : new
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// Set the maximum payload size for packets. This value is used to split
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// large send requests across multiple packets.
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//
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// max_length: Maximum payload length in bytes for each packet
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//
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function void set_max_payload_length(int max_payload_length);
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assert (max_payload_length % BYTES_PER_CHDR_W == 0) else begin
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$fatal(1, "ChdrIfaceBfm::set_max_payload_length: max_payload_length must be a multiple of CHDR_W in bytes");
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end
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this.max_payload_length = max_payload_length;
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endfunction
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// Return the maximum payload size for packets. This value is used to split
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// large send requests across multiple packets.
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function int get_max_payload_length();
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return max_payload_length;
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endfunction
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// Set the timestamp ticks per CHDR_W sized word.
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//
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// ticks_per_word: Amount to increment the timestamp per CHDR_W sized word
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//
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function void set_ticks_per_word(int ticks_per_word);
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this.ticks_per_word = ticks_per_word;
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endfunction
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// Return the timestamp ticks per CHDR_W sized word.
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function int get_ticks_per_word();
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return ticks_per_word;
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endfunction
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// Send a CHDR data packet.
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//
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// data: Data words to insert into the CHDR packet.
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// data_bytes: The number of data bytes in the CHDR packet. This
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// is useful if the data is not a multiple of the
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// chdr_word_t size.
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// metadata: Metadata words to insert into the CHDR packet. Omit this
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// argument (or set to an empty array) to not include
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// metadata.
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// pkt_info: Data structure containing packet header information.
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//
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task send (
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input chdr_word_t data[$],
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input int data_bytes = -1,
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input chdr_word_t metadata[$] = {},
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input packet_info_t pkt_info = 0
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);
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ChdrPacket chdr_packet;
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chdr_header_t chdr_header;
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// Build packet
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chdr_packet = new();
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chdr_header = '{
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vc : pkt_info.vc,
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eob : pkt_info.eob,
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eov : pkt_info.eov,
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seq_num : seq_num++,
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pkt_type : pkt_info.has_time ? CHDR_DATA_WITH_TS : CHDR_DATA_NO_TS,
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dst_epid : dst_epid,
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default : 0
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};
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chdr_packet.write_raw(chdr_header, data, metadata, pkt_info.timestamp, data_bytes);
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// Send the packet
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put_chdr(chdr_packet);
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endtask : send
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// Send a CHDR data packet, filling the payload with items.
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//
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// items: Data items to insert into the CHDR packet.
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// metadata: Metadata words to insert into the CHDR packet. Omit this
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// argument (or set to an empty array) to not include metadata.
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// pkt_info: Data structure containing packet header information.
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//
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task send_items (
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input item_t items[$],
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input chdr_word_t metadata[$] = {},
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input packet_info_t pkt_info = 0
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);
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chdr_word_t data[$];
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data = ChdrData#(CHDR_W, ITEM_W)::item_to_chdr(items);
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send(data, items.size()*BYTES_PER_ITEM_W, metadata, pkt_info);
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endtask : send_items
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// Send data as one or more CHDR data packets. The input data and metadata
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// is automatically broken into max_payload_length'd packets. The
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// timestamp, if present, is set for the first packet and updated for
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// subsequent packets. The EOB and EOV are only applied to the last packet.
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//
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// data: Data words to insert into the CHDR packet.
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// data_bytes: The number of data bytes in the CHDR packet. This
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// is useful if the data is not a multiple of the
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// chdr_word_t size.
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// metadata: Metadata words to insert into the CHDR packet. Omit this
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// argument (or set to an empty array) to not include
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// metadata.
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// pkt_info: Data structure containing packet header information.
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//
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task send_packets (
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input chdr_word_t data[$],
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input int data_bytes = -1,
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input chdr_word_t metadata[$] = {},
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input packet_info_t pkt_info = 0
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);
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ChdrPacket chdr_packet;
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chdr_header_t chdr_header;
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chdr_pkt_type_t pkt_type;
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chdr_word_t timestamp;
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int num_pkts;
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int payload_length;
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int first_dword, last_dword;
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int first_mword, last_mword;
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bit eob, eov;
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chdr_word_t temp_data[$];
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chdr_word_t temp_mdata[$];
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num_pkts = $ceil(real'(data.size()*BYTES_PER_CHDR_W) / max_payload_length);
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pkt_type = pkt_info.has_time ? CHDR_DATA_WITH_TS : CHDR_DATA_NO_TS;
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timestamp = pkt_info.timestamp;
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if (data_bytes < 0) data_bytes = data.size() * BYTES_PER_CHDR_W;
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// Make sure there's not too much metadata for this number of packets
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assert(metadata.size()*$bits(chdr_word_t) < num_pkts * 2**$bits(chdr_num_mdata_t) * CHDR_W) else
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$fatal(1, "ChdrIfaceBfm::send: Too much metadata for this send request");
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// Send the data, one packet at a time.
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for (int i = 0; i < num_pkts; i++) begin
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chdr_packet = new();
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// Figure out which data chunk to send next
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if (i == num_pkts-1) begin
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// The last packet, which may or may not be full-sized
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eob = pkt_info.eob;
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eov = pkt_info.eov;
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payload_length = data_bytes - (num_pkts-1) * max_payload_length;
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first_dword = i*max_payload_length/BYTES_PER_CHDR_W;
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last_dword = data.size()-1;
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first_mword = i*(2**$bits(chdr_num_mdata_t) * CHDR_W / $bits(chdr_word_t));
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last_mword = metadata.size()-1;
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end else begin
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// A full-sized packet, not the last
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eob = 1'b0;
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eov = 1'b0;
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payload_length = max_payload_length;
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first_dword = (i+0)*max_payload_length / BYTES_PER_CHDR_W;
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last_dword = (i+1)*max_payload_length / BYTES_PER_CHDR_W - 1;
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first_mword = (i+0)*(2**$bits(chdr_num_mdata_t)-1);
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last_mword = (i+1)*(2**$bits(chdr_num_mdata_t)-1) - 1;
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last_mword = last_mword > metadata.size() ? metadata.size() : last_mword;
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end
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// Build the packet
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chdr_header = '{
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vc : pkt_info.vc,
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eob : eob,
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eov : eov,
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seq_num : seq_num++,
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pkt_type : pkt_type,
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dst_epid : dst_epid,
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default : 0
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};
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// Copy region of data and metadata to be sent in next packet
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temp_data = data[first_dword : last_dword];
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if (first_mword < metadata.size()) temp_mdata = metadata[first_mword : last_mword];
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else temp_mdata = {};
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// Build the packet
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chdr_packet.write_raw(
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chdr_header,
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temp_data,
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temp_mdata,
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timestamp,
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payload_length
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);
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// Send the packet
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put_chdr(chdr_packet);
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// Update timestamp for next packet (in case this is not the last)
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timestamp += max_payload_length/BYTES_PER_CHDR_W * ticks_per_word;
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end
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endtask : send_packets
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// Send one or more CHDR data packets, filling the payload with items. The
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// input data and metadata is automatically broken into
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// max_payload_length'd packets. The timestamp, if present, is set for the
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// first packet and updated for subsequent packets. The EOB and EOV are
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// only applied to the last packet.
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//
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// items: Data items to insert into the payload of the CHDR packets.
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// metadata: Metadata words to insert into the CHDR packet. Omit this
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// argument (or set to an empty array) to not include metadata.
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// pkt_info: Data structure containing packet header information.
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//
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task send_packets_items (
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input item_t items[$],
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input chdr_word_t metadata[$] = {},
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input packet_info_t pkt_info = 0
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);
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chdr_word_t data[$];
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data = ChdrData#(CHDR_W, ITEM_W)::item_to_chdr(items);
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send_packets(data, items.size()*BYTES_PER_ITEM_W, metadata, pkt_info);
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endtask : send_packets_items
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// Receive a CHDR data packet and extract its contents.
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//
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// data: Data words from the received CHDR packet.
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// data_bytes: The number of data bytes in the CHDR packet. This
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// is useful if the data is not a multiple of the
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// chdr_word_t size.
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// metadata: Metadata words from the received CHDR packet. This
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// will be an empty array if there was no metadata.
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// pkt_info: Data structure to receive packet header information.
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//
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task recv_adv (
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output chdr_word_t data[$],
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output int data_bytes,
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output chdr_word_t metadata[$],
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output packet_info_t pkt_info
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);
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ChdrPacket chdr_packet;
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get_chdr(chdr_packet);
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data = chdr_packet.data;
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data_bytes = chdr_packet.data_bytes();
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metadata = chdr_packet.metadata;
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pkt_info.timestamp = chdr_packet.timestamp;
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pkt_info.vc = chdr_packet.header.vc;
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pkt_info.eob = chdr_packet.header.eob;
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pkt_info.eov = chdr_packet.header.eov;
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pkt_info.has_time = chdr_packet.header.pkt_type == CHDR_DATA_WITH_TS ? 1 : 0;
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endtask : recv_adv
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// Receive a CHDR data packet and extract its contents, putting the payload
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// into a queue of items.
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//
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// items: Items extracted from the payload of the received packet.
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// metadata: Metadata words from the received CHDR packet. This will be
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// an empty array if there was no metadata.
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// pkt_info: Data structure to receive packet header information.
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//
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task recv_items_adv (
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output item_t items[$],
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output chdr_word_t metadata[$],
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output packet_info_t pkt_info
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);
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chdr_word_t data[$];
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int data_bytes;
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recv_adv(data, data_bytes, metadata, pkt_info);
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items = ChdrData#(CHDR_W, ITEM_W)::chdr_to_item(data, data_bytes);
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assert (data_bytes % BYTES_PER_ITEM_W == 0) else begin
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$error({"ChdrIfaceBfm::recv_items_adv: ",
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"Received data was not a multiple of items"});
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end
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endtask : recv_items_adv
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// Receive a CHDR data packet and extract the data. Any metadata or
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// timestamp, if present, are discarded.
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//
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// data: Data words from the received CHDR packet.
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// data_bytes: The number of data bytes in the CHDR packet. This
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// is useful if the data is not a multiple of the
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// chdr_word_t size.
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//
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task recv(output chdr_word_t data[$], output int data_bytes);
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ChdrPacket chdr_packet;
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get_chdr(chdr_packet);
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data = chdr_packet.data;
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data_bytes = chdr_packet.data_bytes();
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endtask : recv
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// Receive a CHDR data packet and extract its payload into a queue of
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// items. Any metadata or timestamp, if present, are discarded.
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//
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// items: Data items extracted from payload of the received CHDR packet.
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//
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task recv_items(
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output item_t items[$]
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);
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chdr_word_t data[$];
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int data_bytes;
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recv(data, data_bytes);
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items = ChdrData#(CHDR_W, ITEM_W)::chdr_to_item(data, data_bytes);
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assert (data_bytes % BYTES_PER_ITEM_W == 0) else begin
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$error({"ChdrIfaceBfm::recv_items: ",
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"Received data was not a multiple of items"});
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end
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endtask : recv_items
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// Receive one ore more CHDR data packets and extract their contents,
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// putting the payload into a queue of items. Any metadata or timestamp, if
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// present, are discarded.
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//
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// items: Items extracted from the payload of the received packets.
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// num_items: (Optional) Minimum number of items to receive. This must be
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// provided, unless eob or eov are set. Defaults to -1, which
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// means that the number of items is not limited.
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// eob: (Optional) Receive up until the next End of Burst (EOB).
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// Default value is 1, so an entire burst is received.
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// eov: (Optional) Receive up until the next End of Vector (EOV).
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//
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task recv_packets_items(
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output item_t items[$],
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input int num_items = -1, // Receive a full burst by default
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input bit eob = 1,
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input bit eov = 0
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);
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chdr_word_t metadata[$];
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packet_info_t pkt_info;
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recv_packets_items_adv(items, metadata, pkt_info, num_items, eob, eov);
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endtask : recv_packets_items
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// Receive one or more CHDR data packets and extract their contents,
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// putting the payload into a queue of items and the metadata into a queue
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// of CHDR words.
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//
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// items: Items extracted from the payload of the received packets.
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// metadata: Metadata words from the received CHDR packets. This will be
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// an empty array if there was no metadata.
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// pkt_info: Data structure to receive packet information. The
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// timestamp, if present, will correspond to the time of the
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// first sample, whereas vc/eob/eov will correspond to the
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// state of the last packet.
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// num_items: (Optional) Minimum number of items to receive. This must be
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// provided, unless eob or eov are set. Defaults to -1, which
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// means that the number of items is not limited.
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// eob: (Optional) Receive up until the next End of Burst (EOB).
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// Default value is 1, so an entire burst is received.
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// eov: (Optional) Receive up until the next End of Vector (EOV).
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//
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task recv_packets_items_adv(
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output item_t items[$],
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output chdr_word_t metadata[$],
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output packet_info_t pkt_info,
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input int num_items = -1, // Receive a full burst by default
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input bit eob = 1,
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input bit eov = 0
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);
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chdr_word_t pkt_data[$];
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chdr_word_t pkt_metadata[$];
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int pkt_data_bytes;
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int item_count;
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packet_info_t time_info;
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item_t new_items[$];
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if (num_items < 0) begin
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assert (eob || eov) else begin
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$fatal(1, {"ChdrIfaceBfm::recv_packets_items_adv: ",
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"eob or eov must be set when num_items is not limited"});
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end
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num_items = 32'h7FFF_FFFF;
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end
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time_info = 0;
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items = {};
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metadata = {};
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while (items.size() < num_items) begin
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// Receive the next packet
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recv_adv(pkt_data, pkt_data_bytes, pkt_metadata, pkt_info);
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if (items.size() == 0) begin
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// First packet, so grab the timestamp if it exists
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if (pkt_info.has_time) time_info = pkt_info;
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end
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// Enqueue the data
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new_items = ChdrData#(CHDR_W, ITEM_W)::chdr_to_item(pkt_data, pkt_data_bytes);
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items = {items, new_items};
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assert (pkt_data_bytes % BYTES_PER_ITEM_W == 0) else begin
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$error({"ChdrIfaceBfm::recv_packets_items_adv: ",
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"Received data was not a multiple of items"});
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end
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// Enqueue the metadata
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metadata = {metadata, pkt_metadata};
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if ((eob && pkt_info.eob) || (eov && pkt_info.eov)) break;
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end
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// Restore timestamp from the first packet
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pkt_info.has_time = time_info.has_time;
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pkt_info.timestamp = time_info.timestamp;
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endtask : recv_packets_items_adv
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endclass : ChdrIfaceBfm
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endpackage : PkgChdrIfaceBfm
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