//
// Copyright 2014-2016 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
// Provides streaming-related functions which are used by device3 objects.
#include "device3_flow_ctrl.hpp"
#include "device3_impl.hpp"
#include <uhd/rfnoc/constants.hpp>
#include <uhd/rfnoc/radio_ctrl.hpp>
#include <uhd/rfnoc/rate_node_ctrl.hpp>
#include <uhd/rfnoc/sink_block_ctrl_base.hpp>
#include <uhd/rfnoc/source_block_ctrl_base.hpp>
#include <uhd/transport/zero_copy_flow_ctrl.hpp>
#include <uhd/utils/byteswap.hpp>
#include <uhd/utils/log.hpp>
#include <uhdlib/rfnoc/rx_stream_terminator.hpp>
#include <uhdlib/rfnoc/tx_stream_terminator.hpp>
#include <uhdlib/usrp/common/async_packet_handler.hpp>
#include <boost/atomic.hpp>
#define UHD_TX_STREAMER_LOG() UHD_LOGGER_TRACE("STREAMER")
#define UHD_RX_STREAMER_LOG() UHD_LOGGER_TRACE("STREAMER")
using namespace uhd;
using namespace uhd::usrp;
using namespace uhd::transport;
/***********************************************************************
* Helper functions for get_?x_stream()
**********************************************************************/
static uhd::stream_args_t sanitize_stream_args(const uhd::stream_args_t& args_)
{
uhd::stream_args_t args = args_;
if (args.channels.empty()) {
args.channels = std::vector<size_t>(1, 0);
}
return args;
}
static void check_stream_sig_compatible(
const rfnoc::stream_sig_t& stream_sig, stream_args_t& args, const std::string& tx_rx)
{
if (args.otw_format.empty()) {
if (stream_sig.item_type.empty()) {
throw uhd::runtime_error(
str(boost::format("[%s Streamer] No otw_format defined!") % tx_rx));
} else {
args.otw_format = stream_sig.item_type;
}
} else if (not stream_sig.item_type.empty()
and stream_sig.item_type != args.otw_format) {
throw uhd::runtime_error(
str(boost::format("[%s Streamer] Conflicting OTW types defined: "
"args.otw_format = '%s' <=> stream_sig.item_type = '%s'")
% tx_rx % args.otw_format % stream_sig.item_type));
}
const size_t bpi = convert::get_bytes_per_item(args.otw_format); // bytes per item
if (stream_sig.packet_size) {
if (args.args.has_key("spp")) {
size_t args_spp = args.args.cast<size_t>("spp", 0);
if (args_spp * bpi != stream_sig.packet_size) {
throw uhd::runtime_error(
str(boost::format(
"[%s Streamer] Conflicting packet sizes defined: args yields "
"%d bytes but stream_sig.packet_size is %d bytes")
% tx_rx % (args_spp * bpi) % stream_sig.packet_size));
}
} else {
args.args["spp"] = str(boost::format("%d") % (stream_sig.packet_size / bpi));
}
}
}
/*! \brief Returns a list of rx or tx channels for a streamer.
*
* If the given stream args contain instructions to set up channels,
* those are used. Otherwise, the current device's channel definition
* is consulted.
*
* \param args_ Stream args.
* \param[out] chan_list The list of channels in the correct order.
* \param[out] chan_args Channel args for every channel. `chan_args.size() ==
* chan_list.size()`
*/
void generate_channel_list(const uhd::stream_args_t& args_,
std::vector<uhd::rfnoc::block_id_t>& chan_list,
std::vector<device_addr_t>& chan_args)
{
uhd::stream_args_t args = args_;
std::vector<uhd::rfnoc::block_id_t> chan_list_(args.channels.size());
std::vector<device_addr_t> chan_args_(args.channels.size());
for (size_t i = 0; i < args.channels.size(); i++) {
// Extract block ID
size_t chan_idx = args.channels[i];
std::string key = str(boost::format("block_id%d") % chan_idx);
if (args.args.has_key(key)) {
chan_list_[i] = args.args.pop(key);
} else if (args.args.has_key("block_id")) {
chan_list_[i] = args.args["block_id"];
} else {
throw uhd::runtime_error(
str(boost::format(
"Cannot create streamers: No block_id specified for channel %d.")
% chan_idx));
}
// Split off known channel specific args
key = str(boost::format("block_port%d") % chan_idx);
if (args.args.has_key(key)) {
chan_args_[i]["block_port"] = args.args.pop(key);
}
key = str(boost::format("radio_id%d") % chan_idx);
if (args.args.has_key(key)) {
chan_args_[i]["radio_id"] = args.args.pop(key);
}
key = str(boost::format("radio_port%d") % chan_idx);
if (args.args.has_key(key)) {
chan_args_[i]["radio_port"] = args.args.pop(key);
}
}
// Add all remaining args to all channel args
for (device_addr_t& chan_arg : chan_args_) {
chan_arg = chan_arg.to_string() + "," + args.args.to_string();
}
chan_list = chan_list_;
chan_args = chan_args_;
}
/***********************************************************************
* RX Flow Control Functions
**********************************************************************/
/*! Determine the size of the flow control window in number of packets.
*
* This value depends on three things:
* - The packet size (in bytes), P
* - The size of the software buffer (in bytes), B
* - The desired buffer fullness, F
*
* The FC window size is thus X = floor(B*F/P).
*
* \param pkt_size The maximum packet size in bytes
* \param sw_buff_size Software buffer size in bytes
* \param rx_args If this has a key 'recv_buff_fullness', this value will
* be used for said fullness. Must be between 0.01 and 1.
*
* \returns The size of the flow control window in number of packets
*/
static size_t get_rx_flow_control_window(
size_t pkt_size, size_t sw_buff_size, const device_addr_t& rx_args)
{
double fullness_factor = rx_args.cast<double>(
"recv_buff_fullness", uhd::rfnoc::DEFAULT_FC_RX_SW_BUFF_FULL_FACTOR);
if (fullness_factor < 0.01 || fullness_factor > 1) {
throw uhd::value_error(
"recv_buff_fullness must be in [0.01, 1] inclusive (1% to 100%)");
}
size_t window_in_bytes = (static_cast<size_t>(sw_buff_size * fullness_factor));
if (rx_args.has_key("max_recv_window")) {
window_in_bytes = std::min(
window_in_bytes, rx_args.cast<size_t>("max_recv_window", window_in_bytes));
}
if (window_in_bytes < pkt_size) {
throw uhd::value_error("recv_buff_size must be larger than the recv_frame_size.");
}
UHD_ASSERT_THROW(size_t(sw_buff_size * fullness_factor) >= window_in_bytes);
return window_in_bytes;
}
/***********************************************************************
* TX Async Message Functions
**********************************************************************/
#define DEVICE3_ASYNC_EVENT_CODE_FLOW_CTRL 0
struct async_tx_info_t
{
size_t stream_channel;
size_t device_channel;
boost::shared_ptr<device3_impl::async_md_type> async_queue;
boost::shared_ptr<device3_impl::async_md_type> old_async_queue;
};
/*! Handle incoming messages.
* Send them to the async message queue for the user to poll.
*
* This is run inside a uhd::task as long as this streamer lives.
*/
static void handle_tx_async_msgs(boost::shared_ptr<async_tx_info_t> async_info,
zero_copy_if::sptr xport,
uint32_t (*to_host)(uint32_t),
void (*unpack)(const uint32_t* packet_buff, vrt::if_packet_info_t&),
boost::function<double(void)> get_tick_rate)
{
managed_recv_buffer::sptr buff = xport->get_recv_buff();
if (not buff) {
return;
}
// extract packet info
vrt::if_packet_info_t if_packet_info;
if_packet_info.num_packet_words32 = buff->size() / sizeof(uint32_t);
const uint32_t* packet_buff = buff->cast<const uint32_t*>();
// unpacking can fail
try {
unpack(packet_buff, if_packet_info);
} catch (const std::exception& ex) {
UHD_LOGGER_ERROR("STREAMER")
<< "Error parsing async message packet: " << ex.what();
return;
}
double tick_rate = get_tick_rate();
if (tick_rate == rfnoc::tick_node_ctrl::RATE_UNDEFINED) {
tick_rate = 1;
}
// fill in the async metadata
async_metadata_t metadata;
load_metadata_from_buff(to_host,
metadata,
if_packet_info,
packet_buff,
tick_rate,
async_info->stream_channel);
// Filter out any flow control messages and cache the rest
if (metadata.event_code == DEVICE3_ASYNC_EVENT_CODE_FLOW_CTRL) {
UHD_LOGGER_ERROR("TX ASYNC MSG")
<< "Unexpected flow control message found in async message handling"
<< std::endl;
} else {
async_info->async_queue->push_with_pop_on_full(metadata);
metadata.channel = async_info->device_channel;
async_info->old_async_queue->push_with_pop_on_full(metadata);
standard_async_msg_prints(metadata);
}
}
bool device3_impl::recv_async_msg(async_metadata_t& async_metadata, double timeout)
{
return _async_md->pop_with_timed_wait(async_metadata, timeout);
}
/***********************************************************************
* Receive streamer
**********************************************************************/
void device3_impl::update_rx_streamers(double /* rate */)
{
for (const std::string& block_id : _rx_streamers.keys()) {
UHD_RX_STREAMER_LOG() << "updating RX streamer to " << block_id;
boost::shared_ptr<device3_recv_packet_streamer> my_streamer =
boost::dynamic_pointer_cast<device3_recv_packet_streamer>(
_rx_streamers[block_id].lock());
if (my_streamer) {
double tick_rate = my_streamer->get_terminator()->get_tick_rate();
if (tick_rate == rfnoc::tick_node_ctrl::RATE_UNDEFINED) {
tick_rate = 1.0;
}
my_streamer->set_tick_rate(tick_rate);
double samp_rate = my_streamer->get_terminator()->get_output_samp_rate();
if (samp_rate == rfnoc::rate_node_ctrl::RATE_UNDEFINED) {
samp_rate = 1.0;
}
double scaling = my_streamer->get_terminator()->get_output_scale_factor();
if (scaling == rfnoc::scalar_node_ctrl::SCALE_UNDEFINED) {
scaling = 1 / 32767.;
}
UHD_RX_STREAMER_LOG()
<< " New tick_rate == " << tick_rate
<< " New samp_rate == " << samp_rate << " New scaling == " << scaling;
my_streamer->set_tick_rate(tick_rate);
my_streamer->set_samp_rate(samp_rate);
my_streamer->set_scale_factor(scaling);
}
}
}
rx_streamer::sptr device3_impl::get_rx_stream(const stream_args_t& args_)
{
boost::mutex::scoped_lock lock(_transport_setup_mutex);
stream_args_t args = sanitize_stream_args(args_);
// I. Generate the channel list
std::vector<uhd::rfnoc::block_id_t> chan_list;
std::vector<device_addr_t> chan_args;
generate_channel_list(args, chan_list, chan_args);
// Note: All 'args.args' are merged into chan_args now.
// II. Iterate over all channels
boost::shared_ptr<device3_recv_packet_streamer> my_streamer;
// The terminator's lifetime is coupled to the streamer.
// There is only one terminator. If the streamer has multiple channels,
// it will be connected to each upstream block.
rfnoc::rx_stream_terminator::sptr recv_terminator =
rfnoc::rx_stream_terminator::make();
for (size_t stream_i = 0; stream_i < chan_list.size(); stream_i++) {
// First, configure blocks and create transport
// Get block ID and mb index
uhd::rfnoc::block_id_t block_id = chan_list[stream_i];
UHD_RX_STREAMER_LOG() << "chan " << stream_i << " connecting to " << block_id;
// Update args so args.args is always valid for this particular channel:
args.args = chan_args[stream_i];
size_t mb_index = block_id.get_device_no();
size_t suggested_block_port =
args.args.cast<size_t>("block_port", rfnoc::ANY_PORT);
// Access to this channel's block control
uhd::rfnoc::source_block_ctrl_base::sptr blk_ctrl =
boost::dynamic_pointer_cast<uhd::rfnoc::source_block_ctrl_base>(
get_block_ctrl(block_id));
// Connect the terminator with this channel's block.
size_t block_port = blk_ctrl->connect_downstream(
recv_terminator, suggested_block_port, args.args);
const size_t terminator_port = recv_terminator->connect_upstream(blk_ctrl);
blk_ctrl->set_downstream_port(block_port, terminator_port);
recv_terminator->set_upstream_port(terminator_port, block_port);
// Check if the block connection is compatible (spp and item type)
check_stream_sig_compatible(
blk_ctrl->get_output_signature(block_port), args, "RX");
// Setup the DSP transport hints
device_addr_t rx_hints = get_rx_hints(mb_index);
// allocate sid and create transport
uhd::sid_t stream_address = blk_ctrl->get_address(block_port);
UHD_RX_STREAMER_LOG() << "creating rx stream " << rx_hints.to_string();
both_xports_t xport = make_transport(stream_address, RX_DATA, rx_hints);
UHD_RX_STREAMER_LOG() << std::hex << "data_sid = " << xport.send_sid << std::dec
<< " actual recv_buff_size = " << xport.recv_buff_size;
// Configure the block
// Flow control setup
const size_t pkt_size = xport.recv->get_recv_frame_size();
// Leave one pkt_size space for overrun packets - TODO make this obsolete
const size_t fc_window =
get_rx_flow_control_window(pkt_size, xport.recv_buff_size, rx_hints)
- pkt_size;
const size_t fc_handle_window =
std::max<size_t>(1, fc_window / stream_options.rx_fc_request_freq);
UHD_RX_STREAMER_LOG() << "Flow Control Window = " << (fc_window)
<< ", Flow Control Handler Window = " << fc_handle_window;
blk_ctrl->configure_flow_control_out(true,
fc_window,
rx_hints.cast<size_t>("recv_pkt_limit",
0), // On rfnoc-devel, update e300_impl::get_rx_hints() to set this to 32
block_port);
// Add flow control transport
boost::shared_ptr<rx_fc_cache_t> fc_cache(new rx_fc_cache_t());
fc_cache->sid = xport.send_sid;
fc_cache->xport = xport.send;
fc_cache->interval = fc_handle_window;
if (xport.endianness == ENDIANNESS_BIG) {
fc_cache->to_host = uhd::ntohx<uint32_t>;
fc_cache->from_host = uhd::htonx<uint32_t>;
fc_cache->pack = vrt::chdr::if_hdr_pack_be;
fc_cache->unpack = vrt::chdr::if_hdr_unpack_be;
} else {
fc_cache->to_host = uhd::wtohx<uint32_t>;
fc_cache->from_host = uhd::htowx<uint32_t>;
fc_cache->pack = vrt::chdr::if_hdr_pack_le;
fc_cache->unpack = vrt::chdr::if_hdr_unpack_le;
}
xport.recv = zero_copy_flow_ctrl::make(
xport.recv, NULL, [fc_cache](managed_buffer::sptr buff) {
return rx_flow_ctrl(fc_cache, buff);
});
// Configure the block
// Note: We need to set_destination() after writing to SR_CLEAR_TX_FC.
// See noc_shell.v, in the section called Stream Source for details.
// Setting SR_CLEAR_TX_FC will actually also clear the destination and
// other settings.
blk_ctrl->sr_write(uhd::rfnoc::SR_CLEAR_TX_FC, 0x1, block_port);
blk_ctrl->sr_write(uhd::rfnoc::SR_CLEAR_TX_FC, 0x0, block_port);
// Configure routing for data
blk_ctrl->set_destination(xport.send_sid.get_src(), block_port);
// Configure routing for responses
blk_ctrl->sr_write(
uhd::rfnoc::SR_RESP_OUT_DST_SID, xport.send_sid.get_src(), block_port);
UHD_RX_STREAMER_LOG() << "resp_out_dst_sid == " << xport.send_sid.get_src();
// Find all upstream radio nodes and set their response in SID to the host
std::vector<boost::shared_ptr<uhd::rfnoc::radio_ctrl>> upstream_radio_nodes =
blk_ctrl->find_upstream_node<uhd::rfnoc::radio_ctrl>();
UHD_RX_STREAMER_LOG() << "Number of upstream radio nodes: "
<< upstream_radio_nodes.size();
for (const boost::shared_ptr<uhd::rfnoc::radio_ctrl>& node :
upstream_radio_nodes) {
node->sr_write(
uhd::rfnoc::SR_RESP_OUT_DST_SID, xport.send_sid.get_src(), block_port);
}
// Second, configure the streamer
// make the new streamer given the samples per packet
if (not my_streamer) {
// To calculate the max number of samples per packet, we assume the maximum
// header length to avoid fragmentation should the entire header be used.
const size_t bpp =
pkt_size - stream_options.rx_max_len_hdr; // bytes per packet
const size_t bpi =
convert::get_bytes_per_item(args.otw_format); // bytes per item
const size_t spp = std::min(args.args.cast<size_t>("spp", bpp / bpi),
bpp / bpi); // samples per packet
UHD_RX_STREAMER_LOG() << "spp == " << spp;
my_streamer = boost::make_shared<device3_recv_packet_streamer>(
spp, recv_terminator, xport);
my_streamer->resize(chan_list.size());
}
// init some streamer stuff
std::string conv_endianness;
if (xport.endianness == ENDIANNESS_BIG) {
my_streamer->set_vrt_unpacker(&vrt::chdr::if_hdr_unpack_be);
conv_endianness = "be";
} else {
my_streamer->set_vrt_unpacker(&vrt::chdr::if_hdr_unpack_le);
conv_endianness = "le";
}
// set the converter
uhd::convert::id_type id;
id.input_format = args.otw_format + "_item32_" + conv_endianness;
id.num_inputs = 1;
id.output_format = args.cpu_format;
id.num_outputs = 1;
my_streamer->set_converter(id);
// Give the streamer a functor to handle flow control ACK messages
my_streamer->set_xport_handle_flowctrl_ack(
stream_i, [fc_cache](const uint32_t* payload) {
handle_rx_flowctrl_ack(fc_cache, payload);
});
// Give the streamer a functor to get the recv_buffer
my_streamer->set_xport_chan_get_buff(stream_i,
[xport](double timeout) { return xport.recv->get_recv_buff(timeout); },
true /*flush*/
);
// Give the streamer a functor to handle overruns
// bind requires a weak_ptr to break the a streamer->streamer circular dependency
// Using "this" is OK because we know that this device3_impl will outlive the
// streamer
boost::weak_ptr<uhd::rx_streamer> weak_ptr(my_streamer);
my_streamer->set_overflow_handler(
stream_i, [recv_terminator, weak_ptr, stream_i]() {
recv_terminator->handle_overrun(weak_ptr, stream_i);
});
// Give the streamer a functor issue stream cmd
my_streamer->set_issue_stream_cmd(
stream_i, [blk_ctrl, block_port](const stream_cmd_t& stream_cmd) {
blk_ctrl->issue_stream_cmd(stream_cmd, block_port);
});
}
// Notify all blocks in this chain that they are connected to an active streamer
recv_terminator->set_rx_streamer(true, 0);
// Store a weak pointer to prevent a streamer->device3_impl->streamer circular
// dependency. Note that we store the streamer only once, and use its terminator's ID
// to do so.
_rx_streamers[recv_terminator->unique_id()] =
boost::weak_ptr<uhd::rx_streamer>(my_streamer);
// Sets tick rate, samp rate and scaling on this streamer.
// A registered terminator is required to do this.
update_rx_streamers();
post_streamer_hooks(RX_DIRECTION);
return my_streamer;
}
/***********************************************************************
* Transmit streamer
**********************************************************************/
void device3_impl::update_tx_streamers(double /* rate */)
{
for (const std::string& block_id : _tx_streamers.keys()) {
UHD_TX_STREAMER_LOG() << "updating TX streamer: " << block_id;
boost::shared_ptr<device3_send_packet_streamer> my_streamer =
boost::dynamic_pointer_cast<device3_send_packet_streamer>(
_tx_streamers[block_id].lock());
if (my_streamer) {
double tick_rate = my_streamer->get_terminator()->get_tick_rate();
if (tick_rate == rfnoc::tick_node_ctrl::RATE_UNDEFINED) {
tick_rate = 1.0;
}
double samp_rate = my_streamer->get_terminator()->get_input_samp_rate();
if (samp_rate == rfnoc::rate_node_ctrl::RATE_UNDEFINED) {
samp_rate = 1.0;
}
double scaling = my_streamer->get_terminator()->get_input_scale_factor();
if (scaling == rfnoc::scalar_node_ctrl::SCALE_UNDEFINED) {
scaling = 32767.;
}
UHD_TX_STREAMER_LOG()
<< "New tick_rate == " << tick_rate << " New samp_rate == " << samp_rate
<< " New scaling == " << scaling;
my_streamer->set_tick_rate(tick_rate);
my_streamer->set_samp_rate(samp_rate);
my_streamer->set_scale_factor(scaling);
}
}
}
tx_streamer::sptr device3_impl::get_tx_stream(const uhd::stream_args_t& args_)
{
boost::mutex::scoped_lock lock(_transport_setup_mutex);
stream_args_t args = sanitize_stream_args(args_);
// I. Generate the channel list
std::vector<uhd::rfnoc::block_id_t> chan_list;
std::vector<device_addr_t> chan_args;
generate_channel_list(args, chan_list, chan_args);
// Note: All 'args.args' are merged into chan_args now.
// shared async queue for all channels in streamer
boost::shared_ptr<async_md_type> async_md(new async_md_type(1000 /*messages deep*/));
// II. Iterate over all channels
boost::shared_ptr<device3_send_packet_streamer> my_streamer;
// The terminator's lifetime is coupled to the streamer.
// There is only one terminator. If the streamer has multiple channels,
// it will be connected to each downstream block.
rfnoc::tx_stream_terminator::sptr send_terminator =
rfnoc::tx_stream_terminator::make();
for (size_t stream_i = 0; stream_i < chan_list.size(); stream_i++) {
// First, configure the downstream blocks and create the transports
// Get block ID and mb index
uhd::rfnoc::block_id_t block_id = chan_list[stream_i];
// Update args so args.args is always valid for this particular channel:
args.args = chan_args[stream_i];
size_t mb_index = block_id.get_device_no();
size_t suggested_block_port =
args.args.cast<size_t>("block_port", rfnoc::ANY_PORT);
// Access to this channel's block control
uhd::rfnoc::sink_block_ctrl_base::sptr blk_ctrl =
boost::dynamic_pointer_cast<uhd::rfnoc::sink_block_ctrl_base>(
get_block_ctrl(block_id));
// Connect the terminator with this channel's block.
// This will throw if the connection is not possible.
size_t block_port =
blk_ctrl->connect_upstream(send_terminator, suggested_block_port, args.args);
const size_t terminator_port = send_terminator->connect_downstream(blk_ctrl);
blk_ctrl->set_upstream_port(block_port, terminator_port);
send_terminator->set_downstream_port(terminator_port, block_port);
// Check if the block connection is compatible (spp and item type)
check_stream_sig_compatible(
blk_ctrl->get_input_signature(block_port), args, "TX");
// Setup the dsp transport hints
device_addr_t tx_hints = get_tx_hints(mb_index);
const size_t fifo_size = blk_ctrl->get_fifo_size(block_port);
// Allocate sid and create transport
uhd::sid_t stream_address = blk_ctrl->get_address(block_port);
UHD_TX_STREAMER_LOG() << "creating tx stream " << tx_hints.to_string();
both_xports_t xport = make_transport(stream_address, TX_DATA, tx_hints);
both_xports_t async_xport =
make_transport(stream_address, ASYNC_MSG, device_addr_t(""));
UHD_TX_STREAMER_LOG() << std::hex << "data_sid = " << xport.send_sid << std::dec;
// Configure flow control
// This disables the FC module's output, do this before configuring flow control
blk_ctrl->sr_write(uhd::rfnoc::SR_CLEAR_RX_FC, 0x1, block_port);
blk_ctrl->sr_write(uhd::rfnoc::SR_CLEAR_RX_FC, 0x0, block_port);
// Configure flow control on downstream block
const size_t fc_window =
std::min(tx_hints.cast<size_t>("send_buff_size", fifo_size), fifo_size);
const size_t fc_handle_window =
std::max<size_t>(1, fc_window / stream_options.tx_fc_response_freq);
UHD_TX_STREAMER_LOG() << "Flow Control Window = " << fc_window
<< ", Flow Control Handler Window = " << fc_handle_window;
blk_ctrl->configure_flow_control_in(fc_handle_window, /*bytes*/
block_port);
// Add flow control transport
boost::shared_ptr<tx_fc_cache_t> fc_cache(new tx_fc_cache_t(fc_window));
if (xport.endianness == ENDIANNESS_BIG) {
fc_cache->to_host = uhd::ntohx<uint32_t>;
fc_cache->from_host = uhd::htonx<uint32_t>;
fc_cache->pack = vrt::chdr::if_hdr_pack_be;
fc_cache->unpack = vrt::chdr::if_hdr_unpack_be;
} else {
fc_cache->to_host = uhd::wtohx<uint32_t>;
fc_cache->from_host = uhd::htowx<uint32_t>;
fc_cache->pack = vrt::chdr::if_hdr_pack_le;
fc_cache->unpack = vrt::chdr::if_hdr_unpack_le;
}
xport.send = zero_copy_flow_ctrl::make(xport.send,
[fc_cache, xport](managed_buffer::sptr buff) {
return tx_flow_ctrl(fc_cache, xport.recv, buff);
},
NULL);
// Configure return path for async messages
blk_ctrl->sr_write(
uhd::rfnoc::SR_RESP_IN_DST_SID, async_xport.recv_sid.get_dst(), block_port);
UHD_TX_STREAMER_LOG() << "resp_in_dst_sid == "
<< boost::format("0x%04X") % xport.recv_sid.get_dst();
// FIXME: Once there is a better way to map the radio block and port
// to the channel or another way to receive asynchronous messages that
// is not in-band, this should be removed.
if (args.args.has_key("radio_id") and args.args.has_key("radio_port")) {
// Find downstream radio node and set the response SID to the host
uhd::rfnoc::block_id_t radio_id(args.args["radio_id"]);
size_t radio_port = args.args.cast<size_t>("radio_port", 0);
std::vector<boost::shared_ptr<uhd::rfnoc::radio_ctrl>>
downstream_radio_nodes =
blk_ctrl->find_downstream_node<uhd::rfnoc::radio_ctrl>();
UHD_TX_STREAMER_LOG()
<< "Number of downstream radio nodes: " << downstream_radio_nodes.size();
for (const boost::shared_ptr<uhd::rfnoc::radio_ctrl>& node :
downstream_radio_nodes) {
if (node->get_block_id() == radio_id) {
node->sr_write(uhd::rfnoc::SR_RESP_IN_DST_SID,
async_xport.recv_sid.get_dst(),
radio_port);
}
}
} else {
// FIXME: This block is preserved for legacy behavior where the
// radio_id and radio_port are not provided. It fails if more
// than one radio is visible downstream or the port on the radio
// is not the same as the block_port. It should be removed as
// soon as possible.
// Find all downstream radio nodes and set their response SID to the host
std::vector<boost::shared_ptr<uhd::rfnoc::radio_ctrl>>
downstream_radio_nodes =
blk_ctrl->find_downstream_node<uhd::rfnoc::radio_ctrl>();
UHD_TX_STREAMER_LOG()
<< "Number of downstream radio nodes: " << downstream_radio_nodes.size();
for (const boost::shared_ptr<uhd::rfnoc::radio_ctrl>& node :
downstream_radio_nodes) {
node->sr_write(uhd::rfnoc::SR_RESP_IN_DST_SID,
async_xport.recv_sid.get_dst(),
block_port);
}
}
// Second, configure the streamer now that the blocks and transports are
// configured
// make the new streamer given the samples per packet
if (not my_streamer) {
// To calculate the max number of samples per packet, we assume the maximum
// header length to avoid fragmentation should the entire header be used.
const size_t bpp =
tx_hints.cast<size_t>("bpp", xport.send->get_send_frame_size())
- stream_options.tx_max_len_hdr;
const size_t bpi =
convert::get_bytes_per_item(args.otw_format); // bytes per item
const size_t spp = std::min(args.args.cast<size_t>("spp", bpp / bpi),
bpp / bpi); // samples per packet
UHD_TX_STREAMER_LOG() << "spp == " << spp;
my_streamer = boost::make_shared<device3_send_packet_streamer>(
spp, send_terminator, xport, async_xport);
my_streamer->resize(chan_list.size());
}
// init some streamer stuff
std::string conv_endianness;
if (xport.endianness == ENDIANNESS_BIG) {
my_streamer->set_vrt_packer(&vrt::chdr::if_hdr_pack_be);
conv_endianness = "be";
} else {
my_streamer->set_vrt_packer(&vrt::chdr::if_hdr_pack_le);
conv_endianness = "le";
}
// set the converter
uhd::convert::id_type id;
id.input_format = args.cpu_format;
id.num_inputs = 1;
id.output_format = args.otw_format + "_item32_" + conv_endianness;
id.num_outputs = 1;
my_streamer->set_converter(id);
boost::shared_ptr<async_tx_info_t> async_tx_info(new async_tx_info_t());
async_tx_info->stream_channel = args.channels[stream_i];
async_tx_info->device_channel = mb_index;
async_tx_info->async_queue = async_md;
async_tx_info->old_async_queue = _async_md;
task::sptr async_task =
task::make([async_tx_info, async_xport, xport, send_terminator]() {
handle_tx_async_msgs(async_tx_info,
async_xport.recv,
xport.endianness == ENDIANNESS_BIG ? uhd::ntohx<uint32_t>
: uhd::wtohx<uint32_t>,
xport.endianness == ENDIANNESS_BIG ? vrt::chdr::if_hdr_unpack_be
: vrt::chdr::if_hdr_unpack_le,
[send_terminator]() { return send_terminator->get_tick_rate(); });
});
my_streamer->add_async_msg_task(async_task);
// Give the streamer a functor to get the send buffer
my_streamer->set_xport_chan_get_buff(stream_i,
[xport](const double timeout) { return xport.send->get_send_buff(timeout); });
// Give the streamer a functor handled received async messages
my_streamer->set_async_receiver(
[async_md](uhd::async_metadata_t& md, const double timeout) {
return async_md->pop_with_timed_wait(md, timeout);
});
my_streamer->set_xport_chan_sid(stream_i, true, xport.send_sid);
// CHDR does not support trailers
my_streamer->set_enable_trailer(false);
my_streamer->set_xport_chan_post_send_cb(stream_i, [fc_cache, xport]() {
tx_flow_ctrl_ack(fc_cache, xport.send, xport.send_sid);
});
}
// Notify all blocks in this chain that they are connected to an active streamer
send_terminator->set_tx_streamer(true, 0);
// Store a weak pointer to prevent a streamer->device3_impl->streamer circular
// dependency. Note that we store the streamer only once, and use its terminator's ID
// to do so.
_tx_streamers[send_terminator->unique_id()] =
boost::weak_ptr<uhd::tx_streamer>(my_streamer);
// Sets tick rate, samp rate and scaling on this streamer
// A registered terminator is required to do this.
update_tx_streamers();
post_streamer_hooks(TX_DIRECTION);
return my_streamer;
}