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-rw-r--r--fpga/usrp3/lib/fifo/Makefile.srcs1
-rw-r--r--fpga/usrp3/lib/fifo/axi_fifo.v14
-rw-r--r--fpga/usrp3/lib/fifo/axi_fifo_2clk.v14
-rw-r--r--fpga/usrp3/lib/fifo/axi_fifo_short.v14
-rw-r--r--fpga/usrp3/lib/fifo/axi_filter_mux4.v154
-rw-r--r--fpga/usrp3/lib/fifo/axi_packet_gate.v14
-rw-r--r--fpga/usrp3/lib/fifo/monitor_axi_fifo.v14
-rw-r--r--fpga/usrp3/lib/fifo/shortfifo.v14
8 files changed, 161 insertions, 78 deletions
diff --git a/fpga/usrp3/lib/fifo/Makefile.srcs b/fpga/usrp3/lib/fifo/Makefile.srcs
index ffe2484f8..389766605 100644
--- a/fpga/usrp3/lib/fifo/Makefile.srcs
+++ b/fpga/usrp3/lib/fifo/Makefile.srcs
@@ -17,4 +17,5 @@ axi_fifo64_to_fifo32.v \
axi_fifo32_to_fifo64.v \
axi_fifo_2clk.v \
axi_loopback.v \
+axi_filter_mux4.v \
))
diff --git a/fpga/usrp3/lib/fifo/axi_fifo.v b/fpga/usrp3/lib/fifo/axi_fifo.v
index efc8f02f1..2f42fc181 100644
--- a/fpga/usrp3/lib/fifo/axi_fifo.v
+++ b/fpga/usrp3/lib/fifo/axi_fifo.v
@@ -1,19 +1,7 @@
//
// Copyright 2012-2013 Ettus Research LLC
//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see <http://www.gnu.org/licenses/>.
-//
+
// Block RAM AXI fifo
diff --git a/fpga/usrp3/lib/fifo/axi_fifo_2clk.v b/fpga/usrp3/lib/fifo/axi_fifo_2clk.v
index 889bc0f9a..f9f7beb88 100644
--- a/fpga/usrp3/lib/fifo/axi_fifo_2clk.v
+++ b/fpga/usrp3/lib/fifo/axi_fifo_2clk.v
@@ -1,19 +1,7 @@
//
// Copyright 2013 Ettus Research LLC
//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see <http://www.gnu.org/licenses/>.
-//
+
// Special case SIZE <= 5 uses a short fifo
diff --git a/fpga/usrp3/lib/fifo/axi_fifo_short.v b/fpga/usrp3/lib/fifo/axi_fifo_short.v
index db34af082..e13993199 100644
--- a/fpga/usrp3/lib/fifo/axi_fifo_short.v
+++ b/fpga/usrp3/lib/fifo/axi_fifo_short.v
@@ -1,19 +1,7 @@
//
// Copyright 2012 Ettus Research LLC
//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see <http://www.gnu.org/licenses/>.
-//
+
//
// 32 word FIFO with AXI4-STREAM interface.
diff --git a/fpga/usrp3/lib/fifo/axi_filter_mux4.v b/fpga/usrp3/lib/fifo/axi_filter_mux4.v
new file mode 100644
index 000000000..cdc314e5f
--- /dev/null
+++ b/fpga/usrp3/lib/fifo/axi_filter_mux4.v
@@ -0,0 +1,154 @@
+// Copyright 2014 Ettus Research LLC
+// axi_filter_mux -- takes 4 64-bit AXI stream of CHDR data, merges them to 1 output channel
+// Round-robin if PRIO=0, priority if PRIO=1 (lower number ports get priority)
+// Bubble cycles are inserted after each packet in PRIO mode, or on wraparound in Round Robin mode.
+// Filter forces specific destination SID to pass per port, else dump data to /dev/null
+
+module axi_filter_mux4
+ #(parameter PRIO=0,
+ parameter WIDTH=64,
+ parameter BUFFER=0,
+ parameter FILTER0 =0,
+ parameter FILTER1 =0,
+ parameter FILTER2 =0,
+ parameter FILTER3 =0
+ )
+ (input clk, input reset, input clear,
+ input [WIDTH-1:0] i0_tdata, input i0_tlast, input i0_tvalid, output i0_tready,
+ input [WIDTH-1:0] i1_tdata, input i1_tlast, input i1_tvalid, output i1_tready,
+ input [WIDTH-1:0] i2_tdata, input i2_tlast, input i2_tvalid, output i2_tready,
+ input [WIDTH-1:0] i3_tdata, input i3_tlast, input i3_tvalid, output i3_tready,
+ output [WIDTH-1:0] o_tdata, output o_tlast, output o_tvalid, input o_tready);
+
+ wire [WIDTH-1:0] o_tdata_int;
+ wire o_tlast_int, o_tvalid_int, o_tready_int;
+
+ reg [3:0] mx_state;
+ reg filter_packet;
+
+ localparam MX_IDLE = 4'b0000;
+ localparam MX_0 = 4'b0001;
+ localparam MX_1 = 4'b0010;
+ localparam MX_2 = 4'b0100;
+ localparam MX_3 = 4'b1000;
+
+
+ assign good0 = i0_tdata[15:0]==FILTER0;
+ assign good1 = i1_tdata[15:0]==FILTER1;
+ assign good2 = i2_tdata[15:0]==FILTER2;
+ assign good3 = i3_tdata[15:0]==FILTER3;
+
+ always @(posedge clk)
+ if(reset | clear)
+ mx_state <= MX_IDLE;
+ else
+ case (mx_state)
+ MX_IDLE :
+ if(i0_tvalid) begin
+ mx_state <= MX_0;
+ filter_packet <= !good0;
+ end
+ else if(i1_tvalid) begin
+ mx_state <= MX_1;
+ filter_packet <= !good1;
+ end
+ else if(i2_tvalid) begin
+ mx_state <= MX_2;
+ filter_packet <= !good2;
+ end
+ else if(i3_tvalid) begin
+ mx_state <= MX_3;
+ filter_packet <= !good3;
+ end
+
+ MX_0 :
+ if(o_tready_int & o_tvalid_int & o_tlast_int)
+ if(PRIO)
+ mx_state <= MX_IDLE;
+ else if(i1_tvalid) begin
+ mx_state <= MX_1;
+ filter_packet <= !good1;
+ end
+ else if(i2_tvalid) begin
+ mx_state <= MX_2;
+ filter_packet <= !good2;
+ end
+ else if(i3_tvalid) begin
+ mx_state <= MX_3;
+ filter_packet <= !good3;
+ end
+ else begin
+ mx_state <= MX_IDLE;
+ filter_packet <= 0;
+ end
+
+ MX_1 :
+ if(o_tready_int & o_tvalid_int & o_tlast_int)
+ if(PRIO)
+ mx_state <= MX_IDLE;
+ else if(i2_tvalid) begin
+ mx_state <= MX_2;
+ filter_packet <= !good2;
+ end
+ else if(i3_tvalid) begin
+ mx_state <= MX_3;
+ filter_packet <= !good3;
+ end
+ else begin
+ mx_state <= MX_IDLE;
+ filter_packet <= 0;
+ end
+ MX_2 :
+ if(o_tready_int & o_tvalid_int & o_tlast_int)
+ if(PRIO)
+ mx_state <= MX_IDLE;
+ else if(i3_tvalid) begin
+ mx_state <= MX_3;
+ filter_packet <= !good3;
+ end
+ else begin
+ mx_state <= MX_IDLE;
+ filter_packet <= 0;
+ end
+ MX_3 :
+ if(o_tready_int & o_tvalid_int & o_tlast_int)
+ begin
+ mx_state <= MX_IDLE;
+ filter_packet <= 0;
+ end
+
+ default :
+ mx_state <= MX_IDLE;
+ endcase // case (mx_state)
+
+ assign {i3_tready, i2_tready, i1_tready, i0_tready} = mx_state & {4{o_tready_int}};
+
+ assign o_tvalid_int = |(mx_state & ({i3_tvalid, i2_tvalid, i1_tvalid, i0_tvalid}));
+
+ assign {o_tlast_int, o_tdata_int} = mx_state[3] ? {i3_tlast, i3_tdata} :
+ mx_state[2] ? {i2_tlast, i2_tdata} :
+ mx_state[1] ? {i1_tlast, i1_tdata} :
+ {i0_tlast, i0_tdata};
+
+ generate
+ if(BUFFER == 0)
+ begin
+ assign o_tdata = o_tdata_int;
+ assign o_tlast = o_tlast_int;
+ assign o_tvalid = o_tvalid_int & !filter_packet;
+ assign o_tready_int = o_tready | filter_packet;
+ end
+ else
+ begin
+ wire o_tready_int_fifo;
+ assign o_tready_int = o_tready_int_fifo | filter_packet;
+
+ axi_fifo_short #(.WIDTH(WIDTH+1)) axi_fifo_short
+ (.clk(clk), .reset(reset), .clear(clear),
+ .i_tdata({o_tlast_int,o_tdata_int}), .i_tvalid(o_tvalid_int & !filter_packet), .i_tready(o_tready_int_fifo),
+ .o_tdata({o_tlast,o_tdata}), .o_tvalid(o_tvalid), .o_tready(o_tready),
+ .space(), .occupied());
+ end
+ endgenerate
+
+endmodule // axi__mux4
diff --git a/fpga/usrp3/lib/fifo/axi_packet_gate.v b/fpga/usrp3/lib/fifo/axi_packet_gate.v
index e1f999250..6d10a8cf4 100644
--- a/fpga/usrp3/lib/fifo/axi_packet_gate.v
+++ b/fpga/usrp3/lib/fifo/axi_packet_gate.v
@@ -1,19 +1,7 @@
//
// Copyright 2012 Ettus Research LLC
//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see <http://www.gnu.org/licenses/>.
-//
+
// Hold packets in fifo until they are complete. This prevents slowly-built packets
// from clogging up the downstream. This block will hold up to 255 packets.
diff --git a/fpga/usrp3/lib/fifo/monitor_axi_fifo.v b/fpga/usrp3/lib/fifo/monitor_axi_fifo.v
index 504296e92..f5d73455f 100644
--- a/fpga/usrp3/lib/fifo/monitor_axi_fifo.v
+++ b/fpga/usrp3/lib/fifo/monitor_axi_fifo.v
@@ -1,19 +1,7 @@
//
// Copyright 2012 Ettus Research LLC
//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see <http://www.gnu.org/licenses/>.
-//
+
//
// This module is instantiated in parallel with a FIFO with AXI4-STREAM interfaces.
diff --git a/fpga/usrp3/lib/fifo/shortfifo.v b/fpga/usrp3/lib/fifo/shortfifo.v
index c7c916375..fbf92e2ed 100644
--- a/fpga/usrp3/lib/fifo/shortfifo.v
+++ b/fpga/usrp3/lib/fifo/shortfifo.v
@@ -1,19 +1,7 @@
//
// Copyright 2011 Ettus Research LLC
//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see <http://www.gnu.org/licenses/>.
-//
+
module shortfifo
generated by cgit v1.2.3 (git 2.46.0) at 2025-11-04 15:13:52 +0000