// // 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 #include #include #include #include #include #include #include #include #include #include #include #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(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("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& chan_list, std::vector& chan_args) { uhd::stream_args_t args = args_; std::vector chan_list_(args.channels.size()); std::vector 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( "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(fullness_factor * sw_buff_size)); if (rx_args.has_key("max_recv_window")) { window_in_bytes = std::min( window_in_bytes, pkt_size * rx_args.cast("max_recv_window", 1) ); } 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 async_queue; boost::shared_ptr 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_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 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(); // 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 my_streamer = boost::dynamic_pointer_cast( _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; } 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 chan_list; std::vector 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 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("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( 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); // Traverse the upstream nodes for minimum mtu size_t min_mtu = blk_ctrl->get_mtu(block_port); UHD_RX_STREAMER_LOG() << "Maximum MTU supported by " << blk_ctrl->unique_id() << ": " << min_mtu; std::vector> upstream_source_nodes = blk_ctrl->find_upstream_node(); for (const boost::shared_ptr& node : upstream_source_nodes) { // Get MTU from Port 0 of the upstream nodes. This is okay for now as // currently we use port 0 of a block in case of channel 1. UHD_RX_STREAMER_LOG() << "Maximum MTU supported by " << node->unique_id() << ": " << node->get_mtu(0); min_mtu = std::min(min_mtu, node->get_mtu(0)); } // Contraint min_mtu by device mtu min_mtu = std::min(min_mtu, get_mtu(mb_index, uhd::direction_t::RX_DIRECTION)); if (rx_hints.has_key("recv_frame_size")) { if (rx_hints.cast("recv_frame_size", min_mtu) > min_mtu) { UHD_RX_STREAMER_LOG() << "Requested recv_frame_size of " << rx_hints["recv_frame_size"] << " exceeds the maximum possible on this stream. Using " << min_mtu; } min_mtu = std::min(min_mtu, rx_hints.cast("recv_frame_size", min_mtu)); } rx_hints["recv_frame_size"] = std::to_string(min_mtu); // 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(pkt_size, 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, xport.lossless, fc_window, rx_hints.cast("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 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; fc_cache->from_host = uhd::htonx; 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; fc_cache->from_host = uhd::htowx; 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, 0, [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> upstream_radio_nodes = blk_ctrl->find_upstream_node(); UHD_RX_STREAMER_LOG() << "Number of upstream radio nodes: " << upstream_radio_nodes.size(); for (const boost::shared_ptr& 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("spp", bpp / bpi), bpp / bpi); // samples per packet UHD_RX_STREAMER_LOG() << "bpp == " << bpp << ", bpi == " << bpi << ", spp == " << spp; my_streamer = boost::make_shared( 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 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(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 my_streamer = boost::dynamic_pointer_cast( _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 chan_list; std::vector 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(new async_md_type(1000 /*messages deep*/)); // II. Iterate over all channels boost::shared_ptr 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("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( 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); // Traverse the downstream nodes for minimum mtu size_t min_mtu = blk_ctrl->get_mtu(block_port); UHD_TX_STREAMER_LOG() << "Maximum MTU supported by " << blk_ctrl->unique_id() << ": " << min_mtu; std::vector> downstream_sink_nodes = blk_ctrl->find_downstream_node(); for (const boost::shared_ptr& node : downstream_sink_nodes) { // Get MTU from Port 0 of the downstream nodes. This is okay for now as // currently we use port 0 of a block in case of channel 1. UHD_TX_STREAMER_LOG() << "Maximum MTU supported by " << node->unique_id() << ": " << node->get_mtu(0); min_mtu = std::min(min_mtu, node->get_mtu(0)); } min_mtu = std::min(min_mtu, get_mtu(mb_index, uhd::direction_t::TX_DIRECTION)); if (tx_hints.has_key("send_frame_size")) { if (tx_hints.cast("send_frame_size", min_mtu) > min_mtu) { UHD_TX_STREAMER_LOG() << "Requested send_frame_size of " << tx_hints["send_frame_size"] << " exceeds the maximum possible on this stream. Using " << min_mtu; } min_mtu = std::min(min_mtu, tx_hints.cast("send_frame_size", min_mtu)); } tx_hints["send_frame_size"] = std::to_string(min_mtu); 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 pkt_size = xport.send->get_send_frame_size(); const size_t fc_window = std::min(tx_hints.cast("send_buff_size", fifo_size), fifo_size); const size_t fc_handle_window = std::max(pkt_size, fc_window / stream_options.tx_fc_response_freq); UHD_TX_STREAMER_LOG() << "Flow Control Window = " << fc_window << ", Flow Control Handler Window = " << fc_handle_window << ", FIFO size = " << fifo_size; blk_ctrl->configure_flow_control_in(fc_handle_window, /*bytes*/ block_port); // Add flow control transport boost::shared_ptr fc_cache(new tx_fc_cache_t(fc_window)); if (xport.endianness == ENDIANNESS_BIG) { fc_cache->to_host = uhd::ntohx; fc_cache->from_host = uhd::htonx; 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; fc_cache->from_host = uhd::htowx; 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); }, 0); // 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("radio_port", 0); std::vector> downstream_radio_nodes = blk_ctrl->find_downstream_node(); UHD_TX_STREAMER_LOG() << "Number of downstream radio nodes: " << downstream_radio_nodes.size(); for (const boost::shared_ptr& 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> downstream_radio_nodes = blk_ctrl->find_downstream_node(); UHD_TX_STREAMER_LOG() << "Number of downstream radio nodes: " << downstream_radio_nodes.size(); for (const boost::shared_ptr& 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("bpp", pkt_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("spp", bpp / bpi), bpp / bpi); // samples per packet UHD_TX_STREAMER_LOG() << "bpp == " << bpp << ", bpi == " << bpi << ", spp == " << spp; my_streamer = boost::make_shared( 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(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 : uhd::wtohx, 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); // Avoid sending FC ACKs if the transport is lossless or the user // has explictly requested not to send them if (not (xport.lossless or tx_hints.has_key("send_no_fc_acks"))) { 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(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; }