// // Copyright 2014-2016 Ettus Research LLC // // SPDX-License-Identifier: GPL-3.0 // // Provides streaming-related functions which are used by device3 objects. #include "device3_impl.hpp" #include #include #include #include #include #include "../common/async_packet_handler.hpp" #include "../../transport/super_recv_packet_handler.hpp" #include "../../transport/super_send_packet_handler.hpp" #include "../../rfnoc/rx_stream_terminator.hpp" #include "../../rfnoc/tx_stream_terminator.hpp" #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; //! CHDR uses 12-Bit sequence numbers static const uint32_t HW_SEQ_NUM_MASK = 0xfff; /*********************************************************************** * 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 **********************************************************************/ //! Stores the state of RX flow control struct rx_fc_cache_t { rx_fc_cache_t(): last_seq_in(0){} size_t last_seq_in; }; /*! 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_pkts = (static_cast(sw_buff_size * fullness_factor) / pkt_size); if (rx_args.has_key("max_recv_window")) { window_in_pkts = std::min( window_in_pkts, rx_args.cast("max_recv_window", window_in_pkts) ); } if (window_in_pkts == 0) { 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) >= pkt_size * window_in_pkts); return window_in_pkts; } /*! Send out RX flow control packets. * * For an rx stream, this function takes care of sending back * a flow control packet to the source telling it which * packets have been consumed. * * This function should only be called by the function handling * the rx stream, usually recv() in super_recv_packet_handler. * * \param sid The SID that goes into this packet. This is the reversed() * version of the data stream's SID. * \param xport A transport object over which to send the data * \param big_endian Endianness of the transport * \param seq32_state Pointer to a variable that saves the 32-Bit state * of the sequence numbers, since we only have 12 Bit * sequence numbers in CHDR. * \param last_seq The value to send: The last consumed packet's sequence number. */ static void handle_rx_flowctrl( const sid_t &sid, zero_copy_if::sptr xport, endianness_t endianness, boost::shared_ptr fc_cache, const size_t last_seq ) { static const size_t RXFC_PACKET_LEN_IN_WORDS = 2; static const size_t RXFC_CMD_CODE_OFFSET = 0; static const size_t RXFC_SEQ_NUM_OFFSET = 1; managed_send_buffer::sptr buff = xport->get_send_buff(0.0); if (not buff) { throw uhd::runtime_error("handle_rx_flowctrl timed out getting a send buffer"); } uint32_t *pkt = buff->cast(); // Recover sequence number. The sequence numbers handled by the streamers // are 12 Bits, but we want to know the 32-Bit sequence number. size_t &seq32 = fc_cache->last_seq_in; const size_t seq12 = seq32 & HW_SEQ_NUM_MASK; if (last_seq < seq12) seq32 += (HW_SEQ_NUM_MASK + 1); seq32 &= ~HW_SEQ_NUM_MASK; seq32 |= last_seq; // Super-verbose mode: //static size_t fc_pkt_count = 0; //UHD_LOGGER_INFO("STREAMER") << "sending flow ctrl packet " << fc_pkt_count++ << ", acking " << str(boost::format("%04d\tseq_sw==0x%08x") % last_seq % seq32) ; //load packet info vrt::if_packet_info_t packet_info; packet_info.packet_type = vrt::if_packet_info_t::PACKET_TYPE_FC; packet_info.num_payload_words32 = RXFC_PACKET_LEN_IN_WORDS; packet_info.num_payload_bytes = packet_info.num_payload_words32*sizeof(uint32_t); packet_info.packet_count = seq32; packet_info.sob = false; packet_info.eob = false; packet_info.sid = sid.get(); packet_info.has_sid = true; packet_info.has_cid = false; packet_info.has_tsi = false; packet_info.has_tsf = false; packet_info.has_tlr = false; if (endianness == ENDIANNESS_BIG) { // Load Header: vrt::chdr::if_hdr_pack_be(pkt, packet_info); // Load Payload: (the sequence number) pkt[packet_info.num_header_words32+RXFC_CMD_CODE_OFFSET] = uhd::htonx(0); pkt[packet_info.num_header_words32+RXFC_SEQ_NUM_OFFSET] = uhd::htonx(seq32); } else { // Load Header: vrt::chdr::if_hdr_pack_le(pkt, packet_info); // Load Payload: (the sequence number) pkt[packet_info.num_header_words32+RXFC_CMD_CODE_OFFSET] = uhd::htowx(0); pkt[packet_info.num_header_words32+RXFC_SEQ_NUM_OFFSET] = uhd::htowx(seq32); } //std::cout << " SID=" << std::hex << sid << " hdr bits=" << packet_info.packet_type << " seq32=" << seq32 << std::endl; //std::cout << "num_packet_words32: " << packet_info.num_packet_words32 << std::endl; //for (size_t i = 0; i < packet_info.num_packet_words32; i++) { //std::cout << str(boost::format("0x%08x") % pkt[i]) << " "; //if (i % 2) { //std::cout << std::endl; //} //} //send the buffer over the interface buff->commit(sizeof(uint32_t)*(packet_info.num_packet_words32)); } /*********************************************************************** * TX Flow Control Functions **********************************************************************/ #define DEVICE3_ASYNC_EVENT_CODE_FLOW_CTRL 0 //! Stores the state of TX flow control struct tx_fc_cache_t { tx_fc_cache_t(size_t capacity): last_seq_ack(0), space(capacity) {} size_t last_seq_ack; size_t space; }; /*! Return the size of the flow control window in packets. * * If the return value of this function is F, the last tx'd packet * has index N and the last ack'd packet has index M, the amount of * FC credit we have is C = F + M - N (i.e. we can send C more packets * before getting another ack). * * Note: If `send_buff_size` is set in \p tx_hints, this will * override hw_buff_size_. */ static size_t get_tx_flow_control_window( size_t pkt_size, const double hw_buff_size_, const device_addr_t& tx_hints ) { double hw_buff_size = tx_hints.cast("send_buff_size", hw_buff_size_); size_t window_in_pkts = (static_cast(hw_buff_size) / pkt_size); if (window_in_pkts == 0) { throw uhd::value_error("send_buff_size must be larger than the send_frame_size."); } return window_in_pkts; } static bool tx_flow_ctrl( boost::shared_ptr fc_cache, zero_copy_if::sptr async_xport, uint32_t (*endian_conv)(uint32_t), void (*unpack)(const uint32_t *packet_buff, vrt::if_packet_info_t &), managed_buffer::sptr ) { while (true) { // If there is space if (fc_cache->space) { // All is good - packet will be sent fc_cache->space--; return true; } // Look for a flow control message to update the space available in the buffer. // A minimal timeout is used because larger timeouts can cause the thread to be // scheduled out for too long at high data rates and result in underruns. managed_recv_buffer::sptr buff = async_xport->get_recv_buff(0.000001); if (buff) { 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(); try { unpack(packet_buff, if_packet_info); } catch(const std::exception &ex) { UHD_LOG_ERROR("TX FLOW CTRL", "Error unpacking async flow control packet: " << ex.what()); continue; } if (if_packet_info.packet_type != vrt::if_packet_info_t::PACKET_TYPE_FC) { UHD_LOG_ERROR( "TX FLOW CTRL", "Unexpected packet type received by flow control handler: " << if_packet_info.packet_type ); continue; } // update the amount of space size_t seq_ack = endian_conv(packet_buff[if_packet_info.num_header_words32+1]); fc_cache->space += (seq_ack - fc_cache->last_seq_ack) & HW_SEQ_NUM_MASK; fc_cache->last_seq_ack = seq_ack; } } return false; } /*********************************************************************** * TX Async Message Functions **********************************************************************/ 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, endianness_t endianness, 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 uint32_t (*endian_conv)(uint32_t) = uhd::ntohx; try { if (endianness == ENDIANNESS_BIG) { vrt::chdr::if_hdr_unpack_be(packet_buff, if_packet_info); endian_conv = uhd::ntohx; } else { vrt::chdr::if_hdr_unpack_le(packet_buff, if_packet_info); endian_conv = uhd::wtohx; } } 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( endian_conv, 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_LOG_ERROR( "TX ASYNC", "Unexpected flow control message found in async message handling" ); } 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; } 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 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++) { // 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); //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 blk_ctrl->set_destination(xport.send_sid.get_src(), block_port); 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); } // 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 = xport.recv->get_recv_frame_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() << "spp == " << spp ; //make the new streamer given the samples per packet if (not my_streamer) my_streamer = boost::make_shared(spp); 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); //flow control setup const size_t pkt_size = spp * bpi + stream_options.rx_max_len_hdr; const size_t fc_window = get_rx_flow_control_window(pkt_size, xport.recv_buff_size, rx_hints); const size_t fc_handle_window = std::max(1, fc_window / stream_options.rx_fc_request_freq); UHD_RX_STREAMER_LOG()<< "Flow Control Window (minus one) = " << fc_window-1 << ", Flow Control Handler Window = " << fc_handle_window ; blk_ctrl->configure_flow_control_out( fc_window-1, // Leave one space for overrun packets TODO make this obsolete block_port ); //Give the streamer a functor to get the recv_buffer //bind requires a zero_copy_if::sptr to add a streamer->xport lifetime dependency my_streamer->set_xport_chan_get_buff( stream_i, boost::bind(&zero_copy_if::get_recv_buff, xport.recv, _1), 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 my_streamer->set_overflow_handler( stream_i, boost::bind( &uhd::rfnoc::rx_stream_terminator::handle_overrun, recv_terminator, boost::weak_ptr(my_streamer), stream_i ) ); //Give the streamer a functor to send flow control messages //handle_rx_flowctrl is static and has no lifetime issues boost::shared_ptr fc_cache(new rx_fc_cache_t()); my_streamer->set_xport_handle_flowctrl( stream_i, boost::bind( &handle_rx_flowctrl, xport.send_sid, xport.send, xport.endianness, fc_cache, _1 ), fc_handle_window, true/*init*/ ); //Give the streamer a functor issue stream cmd //bind requires a shared pointer to add a streamer->framer lifetime dependency my_streamer->set_issue_stream_cmd( stream_i, boost::bind(&uhd::rfnoc::source_block_ctrl_base::issue_stream_cmd, blk_ctrl, _1, block_port) ); // Tell the streamer which SID is valid for this channel my_streamer->set_xport_chan_sid(stream_i, true, xport.send_sid); } // Connect the terminator to the streamer my_streamer->set_terminator(recv_terminator); // 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); } } } // This class manages the lifetime of the TX async message handler task and transports class device3_send_packet_streamer : public sph::send_packet_streamer { public: device3_send_packet_streamer(const size_t max_num_samps) : sph::send_packet_streamer(max_num_samps) {}; ~device3_send_packet_streamer() { _tx_async_msg_task.reset(); // Make sure the async task is destroyed before the transports }; both_xports_t _xport; both_xports_t _async_xport; task::sptr _tx_async_msg_task; }; 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++) { // 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); //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 << "[TX Streamer] data_sid = " << xport.send_sid << std::dec << std::endl; // 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", 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("spp", bpp/bpi), bpp/bpi); // samples per packet UHD_TX_STREAMER_LOG() << "spp == " << spp ; //make the new streamer given the samples per packet if (not my_streamer) my_streamer = boost::make_shared(spp); my_streamer->resize(chan_list.size()); my_streamer->_xport = xport; my_streamer->_async_xport = async_xport; //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); //flow control setup const size_t pkt_size = spp * bpi + stream_options.tx_max_len_hdr; // For flow control, this value is used to determine the window size in *packets* size_t fc_window = get_tx_flow_control_window( pkt_size, // This is the maximum packet size blk_ctrl->get_fifo_size(block_port), tx_hints // This can override the value reported by the block! ); const size_t fc_handle_window = std::max(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( stream_options.tx_fc_response_cycles, fc_handle_window, /*pkts*/ block_port ); 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; boost::function tick_rate_retriever = boost::bind( &rfnoc::tick_node_ctrl::get_tick_rate, send_terminator, std::set< rfnoc::node_ctrl_base::sptr >() // Need to specify default args with bind ); my_streamer->_tx_async_msg_task = task::make( boost::bind( &handle_tx_async_msgs, async_tx_info, my_streamer->_async_xport.recv, xport.endianness, tick_rate_retriever ), "tx_async_msgs_task" ); blk_ctrl->sr_write(uhd::rfnoc::SR_CLEAR_RX_FC, 0xc1ea12, block_port); blk_ctrl->sr_write(uhd::rfnoc::SR_RESP_IN_DST_SID, my_streamer->_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, my_streamer->_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, my_streamer->_async_xport.recv_sid.get_dst(), block_port); } } // Add flow control boost::shared_ptr fc_cache(new tx_fc_cache_t(fc_window)); my_streamer->_xport.send = zero_copy_flow_ctrl::make( my_streamer->_xport.send, boost::bind( &tx_flow_ctrl, fc_cache, my_streamer->_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), _1), NULL); //Give the streamer a functor to get the send buffer my_streamer->set_xport_chan_get_buff( stream_i, boost::bind(&zero_copy_if::get_send_buff, my_streamer->_xport.send, _1) ); //Give the streamer a functor handled received async messages my_streamer->set_async_receiver( boost::bind(&async_md_type::pop_with_timed_wait, async_md, _1, _2) ); my_streamer->set_xport_chan_sid(stream_i, true, xport.send_sid); // CHDR does not support trailers my_streamer->set_enable_trailer(false); } // Connect the terminator to the streamer my_streamer->set_terminator(send_terminator); // 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; }