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//
// Copyright 2016 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/>.
//
#include "graph_impl.hpp"
#include <uhd/rfnoc/source_block_ctrl_base.hpp>
#include <uhd/rfnoc/sink_block_ctrl_base.hpp>
#include <uhd/utils/msg.hpp>
using namespace uhd::rfnoc;
/****************************************************************************
* Structors
***************************************************************************/
graph_impl::graph_impl(
const std::string &name,
boost::weak_ptr<uhd::device3> device_ptr
//async_msg_handler::sptr msg_handler
) : _name(name)
, _device_ptr(device_ptr)
{
}
/****************************************************************************
* Connection API
***************************************************************************/
void graph_impl::connect(
const block_id_t &src_block,
size_t src_block_port,
const block_id_t &dst_block,
size_t dst_block_port,
const size_t pkt_size_
) {
device3::sptr device_ptr = _device_ptr.lock();
if (not device_ptr) {
throw uhd::runtime_error("Invalid device");
}
uhd::rfnoc::source_block_ctrl_base::sptr src = device_ptr->get_block_ctrl<rfnoc::source_block_ctrl_base>(src_block);
uhd::rfnoc::sink_block_ctrl_base::sptr dst = device_ptr->get_block_ctrl<rfnoc::sink_block_ctrl_base>(dst_block);
/********************************************************************
* 1. Draw the edges (logically connect the nodes)
********************************************************************/
size_t actual_src_block_port = src->connect_downstream(
boost::dynamic_pointer_cast<uhd::rfnoc::node_ctrl_base>(dst),
src_block_port
);
if (src_block_port == uhd::rfnoc::ANY_PORT) {
src_block_port = actual_src_block_port;
} else if (src_block_port != actual_src_block_port) {
throw uhd::runtime_error(str(
boost::format("Can't connect to port %d on block %s.")
% src_block_port % src->unique_id()
));
}
size_t actual_dst_block_port = dst->connect_upstream(
boost::dynamic_pointer_cast<uhd::rfnoc::node_ctrl_base>(src),
dst_block_port
);
if (dst_block_port == uhd::rfnoc::ANY_PORT) {
dst_block_port = actual_dst_block_port;
} else if (dst_block_port != actual_dst_block_port) {
throw uhd::runtime_error(str(
boost::format("Can't connect to port %d on block %s.")
% dst_block_port % dst->unique_id()
));
}
src->set_downstream_port(actual_src_block_port, actual_dst_block_port);
dst->set_upstream_port(actual_dst_block_port, actual_src_block_port);
// At this point, ports are locked and no one else can simply connect
// into them.
UHD_MSG(status)
<< "[" << _name << "] Connecting "
<< src_block << ":" << actual_src_block_port << " --> "
<< dst_block << ":" << actual_dst_block_port << std::endl;
/********************************************************************
* 2. Check IO signatures match
********************************************************************/
if (not rfnoc::stream_sig_t::is_compatible(
src->get_output_signature(actual_src_block_port),
dst->get_input_signature(actual_dst_block_port)
)) {
throw uhd::runtime_error(str(
boost::format("Can't connect block %s to %s: IO signature mismatch\n(%s is incompatible with %s).")
% src->get_block_id().get() % dst->get_block_id().get()
% src->get_output_signature(actual_src_block_port)
% dst->get_input_signature(actual_dst_block_port)
));
}
/********************************************************************
* 3. Configure the source block's destination
********************************************************************/
// Calculate SID
sid_t sid = dst->get_address(dst_block_port);
sid.set_src(src->get_address(src_block_port));
// Set SID on source block
src->set_destination(sid.get(), src_block_port);
/********************************************************************
* 4. Configure flow control
********************************************************************/
size_t pkt_size = (pkt_size_ != 0) ? pkt_size_ : src->get_output_signature(src_block_port).packet_size;
if (pkt_size == 0) { // Unspecified packet rate. Assume max packet size.
UHD_MSG(status) << "Assuming max packet size for " << src->get_block_id() << std::endl;
pkt_size = uhd::rfnoc::MAX_PACKET_SIZE;
}
// FC window (in packets) depends on FIFO size... ...and packet size.
size_t buf_size_pkts = dst->get_fifo_size(dst_block_port) / pkt_size;
if (buf_size_pkts == 0) {
throw uhd::runtime_error(str(
boost::format("Input FIFO for block %s is too small (%d kiB) for packets of size %d kiB\n"
"coming from block %s.")
% dst->get_block_id().get() % (dst->get_fifo_size(dst_block_port) / 1024)
% (pkt_size / 1024) % src->get_block_id().get()
));
}
src->configure_flow_control_out(buf_size_pkts, src_block_port);
// On the same crossbar, use lots of FC packets
size_t pkts_per_ack = std::min(
uhd::rfnoc::DEFAULT_FC_XBAR_PKTS_PER_ACK,
buf_size_pkts - 1
);
// Over the network, use less or we'd flood the transport
if (sid.get_src_addr() != sid.get_dst_addr()) {
pkts_per_ack = std::max<size_t>(buf_size_pkts / uhd::rfnoc::DEFAULT_FC_TX_RESPONSE_FREQ, 1);
}
dst->configure_flow_control_in(
0, // Default to not use cycles
pkts_per_ack,
dst_block_port
);
/********************************************************************
* 5. Configure error policy
********************************************************************/
dst->set_error_policy("next_burst");
}
void graph_impl::connect(
const block_id_t &src_block,
const block_id_t &dst_block
) {
connect(src_block, ANY_PORT, dst_block, ANY_PORT);
}
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