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-rw-r--r--host/lib/usrp/b100/io_impl.cpp299
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diff --git a/host/lib/usrp/b100/io_impl.cpp b/host/lib/usrp/b100/io_impl.cpp
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+++ b/host/lib/usrp/b100/io_impl.cpp
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+//
+// Copyright 2011 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "recv_packet_demuxer.hpp"
+#include "validate_subdev_spec.hpp"
+#include "../../transport/super_recv_packet_handler.hpp"
+#include "../../transport/super_send_packet_handler.hpp"
+#include "usrp_commands.h"
+#include "b100_impl.hpp"
+#include "b100_regs.hpp"
+#include <uhd/utils/thread_priority.hpp>
+#include <uhd/transport/bounded_buffer.hpp>
+#include <boost/bind.hpp>
+#include <boost/format.hpp>
+#include <boost/bind.hpp>
+#include <boost/thread.hpp>
+#include <uhd/utils/msg.hpp>
+#include <uhd/utils/log.hpp>
+#include <boost/make_shared.hpp>
+
+using namespace uhd;
+using namespace uhd::usrp;
+using namespace uhd::transport;
+
+/***********************************************************************
+ * IO Implementation Details
+ **********************************************************************/
+struct b100_impl::io_impl{
+ io_impl(void):
+ async_msg_fifo(100/*messages deep*/)
+ { /* NOP */ }
+
+ zero_copy_if::sptr data_transport;
+ bounded_buffer<async_metadata_t> async_msg_fifo;
+ recv_packet_demuxer::sptr demuxer;
+};
+
+/***********************************************************************
+ * Initialize internals within this file
+ **********************************************************************/
+void b100_impl::io_init(void){
+
+ //clear state machines
+ _fpga_ctrl->poke32(B100_REG_CLEAR_RX, 0);
+ _fpga_ctrl->poke32(B100_REG_CLEAR_TX, 0);
+
+ //set the expected packet size in USB frames
+ _fpga_ctrl->poke32(B100_REG_MISC_RX_LEN, 4);
+
+ //allocate streamer weak ptrs containers
+ _rx_streamers.resize(_rx_dsps.size());
+ _tx_streamers.resize(1/*known to be 1 dsp*/);
+
+ //create new io impl
+ _io_impl = UHD_PIMPL_MAKE(io_impl, ());
+ _io_impl->demuxer = recv_packet_demuxer::make(_data_transport, _rx_dsps.size(), B100_RX_SID_BASE);
+
+ //now its safe to register the async callback
+ _fpga_ctrl->set_async_cb(boost::bind(&b100_impl::handle_async_message, this, _1));
+}
+
+void b100_impl::handle_async_message(managed_recv_buffer::sptr rbuf){
+ vrt::if_packet_info_t if_packet_info;
+ if_packet_info.num_packet_words32 = rbuf->size()/sizeof(boost::uint32_t);
+ const boost::uint32_t *vrt_hdr = rbuf->cast<const boost::uint32_t *>();
+ try{
+ vrt::if_hdr_unpack_le(vrt_hdr, if_packet_info);
+ }
+ catch(const std::exception &e){
+ UHD_MSG(error) << "Error (handle_async_message): " << e.what() << std::endl;
+ }
+
+ if (if_packet_info.sid == B100_TX_ASYNC_SID and if_packet_info.packet_type != vrt::if_packet_info_t::PACKET_TYPE_DATA){
+ //fill in the async metadata
+ async_metadata_t metadata;
+ metadata.channel = 0;
+ metadata.has_time_spec = if_packet_info.has_tsi and if_packet_info.has_tsf;
+ metadata.time_spec = time_spec_t(
+ time_t(if_packet_info.tsi), size_t(if_packet_info.tsf), _clock_ctrl->get_fpga_clock_rate()
+ );
+ metadata.event_code = async_metadata_t::event_code_t(sph::get_context_code(vrt_hdr, if_packet_info));
+ _io_impl->async_msg_fifo.push_with_pop_on_full(metadata);
+ if (metadata.event_code &
+ ( async_metadata_t::EVENT_CODE_UNDERFLOW
+ | async_metadata_t::EVENT_CODE_UNDERFLOW_IN_PACKET)
+ ) UHD_MSG(fastpath) << "U";
+ else if (metadata.event_code &
+ ( async_metadata_t::EVENT_CODE_SEQ_ERROR
+ | async_metadata_t::EVENT_CODE_SEQ_ERROR_IN_BURST)
+ ) UHD_MSG(fastpath) << "S";
+ }
+ else UHD_MSG(error) << "Unknown async packet" << std::endl;
+}
+
+void b100_impl::update_rates(void){
+ const fs_path mb_path = "/mboards/0";
+ _tree->access<double>(mb_path / "tick_rate").update();
+
+ //and now that the tick rate is set, init the host rates to something
+ BOOST_FOREACH(const std::string &name, _tree->list(mb_path / "rx_dsps")){
+ _tree->access<double>(mb_path / "rx_dsps" / name / "rate" / "value").update();
+ }
+ BOOST_FOREACH(const std::string &name, _tree->list(mb_path / "tx_dsps")){
+ _tree->access<double>(mb_path / "tx_dsps" / name / "rate" / "value").update();
+ }
+}
+
+void b100_impl::update_tick_rate(const double rate){
+ //update the tick rate on all existing streamers -> thread safe
+ for (size_t i = 0; i < _rx_streamers.size(); i++){
+ boost::shared_ptr<sph::recv_packet_streamer> my_streamer =
+ boost::dynamic_pointer_cast<sph::recv_packet_streamer>(_rx_streamers[i].lock());
+ if (my_streamer.get() == NULL) continue;
+ my_streamer->set_tick_rate(rate);
+ }
+ for (size_t i = 0; i < _tx_streamers.size(); i++){
+ boost::shared_ptr<sph::send_packet_streamer> my_streamer =
+ boost::dynamic_pointer_cast<sph::send_packet_streamer>(_tx_streamers[i].lock());
+ if (my_streamer.get() == NULL) continue;
+ my_streamer->set_tick_rate(rate);
+ }
+}
+
+void b100_impl::update_rx_samp_rate(const size_t dspno, const double rate){
+ boost::shared_ptr<sph::recv_packet_streamer> my_streamer =
+ boost::dynamic_pointer_cast<sph::recv_packet_streamer>(_rx_streamers[dspno].lock());
+ if (my_streamer.get() == NULL) return;
+
+ my_streamer->set_samp_rate(rate);
+ const double adj = _rx_dsps[dspno]->get_scaling_adjustment();
+ my_streamer->set_scale_factor(adj);
+}
+
+void b100_impl::update_tx_samp_rate(const size_t dspno, const double rate){
+ boost::shared_ptr<sph::send_packet_streamer> my_streamer =
+ boost::dynamic_pointer_cast<sph::send_packet_streamer>(_tx_streamers[dspno].lock());
+ if (my_streamer.get() == NULL) return;
+
+ my_streamer->set_samp_rate(rate);
+}
+
+void b100_impl::update_rx_subdev_spec(const uhd::usrp::subdev_spec_t &spec){
+ fs_path root = "/mboards/0/dboards";
+
+ //sanity checking
+ validate_subdev_spec(_tree, spec, "rx");
+
+ //setup mux for this spec
+ bool fe_swapped = false;
+ for (size_t i = 0; i < spec.size(); i++){
+ const std::string conn = _tree->access<std::string>(root / spec[i].db_name / "rx_frontends" / spec[i].sd_name / "connection").get();
+ if (i == 0 and (conn == "QI" or conn == "Q")) fe_swapped = true;
+ _rx_dsps[i]->set_mux(conn, fe_swapped);
+ }
+ _rx_fe->set_mux(fe_swapped);
+}
+
+void b100_impl::update_tx_subdev_spec(const uhd::usrp::subdev_spec_t &spec){
+ fs_path root = "/mboards/0/dboards";
+
+ //sanity checking
+ validate_subdev_spec(_tree, spec, "tx");
+
+ //set the mux for this spec
+ const std::string conn = _tree->access<std::string>(root / spec[0].db_name / "tx_frontends" / spec[0].sd_name / "connection").get();
+ _tx_fe->set_mux(conn);
+}
+
+/***********************************************************************
+ * Async Data
+ **********************************************************************/
+bool b100_impl::recv_async_msg(
+ async_metadata_t &async_metadata, double timeout
+){
+ boost::this_thread::disable_interruption di; //disable because the wait can throw
+ return _io_impl->async_msg_fifo.pop_with_timed_wait(async_metadata, timeout);
+}
+
+/***********************************************************************
+ * Receive streamer
+ **********************************************************************/
+rx_streamer::sptr b100_impl::get_rx_stream(const uhd::stream_args_t &args_){
+ stream_args_t args = args_;
+
+ //setup defaults for unspecified values
+ args.otw_format = args.otw_format.empty()? "sc16" : args.otw_format;
+ args.channels = args.channels.empty()? std::vector<size_t>(1, 0) : args.channels;
+ const unsigned sc8_scalar = unsigned(args.args.cast<double>("scalar", 0x400));
+
+ //calculate packet size
+ static const size_t hdr_size = 0
+ + vrt::max_if_hdr_words32*sizeof(boost::uint32_t)
+ + sizeof(vrt::if_packet_info_t().tlr) //forced to have trailer
+ - sizeof(vrt::if_packet_info_t().cid) //no class id ever used
+ ;
+ const size_t bpp = 2048 - hdr_size; //limited by FPGA pkt buffer size
+ const size_t spp = bpp/convert::get_bytes_per_item(args.otw_format);
+
+ //make the new streamer given the samples per packet
+ boost::shared_ptr<sph::recv_packet_streamer> my_streamer = boost::make_shared<sph::recv_packet_streamer>(spp);
+
+ //init some streamer stuff
+ my_streamer->resize(args.channels.size());
+ my_streamer->set_vrt_unpacker(&vrt::if_hdr_unpack_le);
+
+ //set the converter
+ uhd::convert::id_type id;
+ id.input_format = args.otw_format + "_item32_le";
+ id.num_inputs = 1;
+ id.output_format = args.cpu_format;
+ id.num_outputs = 1;
+ my_streamer->set_converter(id);
+
+ //bind callbacks for the handler
+ for (size_t chan_i = 0; chan_i < args.channels.size(); chan_i++){
+ const size_t dsp = args.channels[chan_i];
+ _rx_dsps[dsp]->set_nsamps_per_packet(spp); //seems to be a good place to set this
+ _rx_dsps[dsp]->set_format(args.otw_format, sc8_scalar);
+ my_streamer->set_xport_chan_get_buff(chan_i, boost::bind(
+ &recv_packet_demuxer::get_recv_buff, _io_impl->demuxer, dsp, _1
+ ));
+ my_streamer->set_overflow_handler(chan_i, boost::bind(
+ &rx_dsp_core_200::handle_overflow, _rx_dsps[dsp]
+ ));
+ _rx_streamers[dsp] = my_streamer; //store weak pointer
+ }
+
+ //sets all tick and samp rates on this streamer
+ this->update_rates();
+
+ return my_streamer;
+}
+
+/***********************************************************************
+ * Transmit streamer
+ **********************************************************************/
+tx_streamer::sptr b100_impl::get_tx_stream(const uhd::stream_args_t &args_){
+ stream_args_t args = args_;
+
+ //setup defaults for unspecified values
+ args.otw_format = args.otw_format.empty()? "sc16" : args.otw_format;
+ args.channels = args.channels.empty()? std::vector<size_t>(1, 0) : args.channels;
+
+ if (args.otw_format != "sc16"){
+ throw uhd::value_error("USRP TX cannot handle requested wire format: " + args.otw_format);
+ }
+
+ //calculate packet size
+ static const size_t hdr_size = 0
+ + vrt::max_if_hdr_words32*sizeof(boost::uint32_t)
+ - sizeof(vrt::if_packet_info_t().cid) //no class id ever used
+ ;
+ static const size_t bpp = 2048 - hdr_size;
+ const size_t spp = bpp/convert::get_bytes_per_item(args.otw_format);
+
+ //make the new streamer given the samples per packet
+ boost::shared_ptr<sph::send_packet_streamer> my_streamer = boost::make_shared<sph::send_packet_streamer>(spp);
+
+ //init some streamer stuff
+ my_streamer->resize(args.channels.size());
+ my_streamer->set_vrt_packer(&vrt::if_hdr_pack_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_le";
+ id.num_outputs = 1;
+ my_streamer->set_converter(id);
+
+ //bind callbacks for the handler
+ for (size_t chan_i = 0; chan_i < args.channels.size(); chan_i++){
+ const size_t dsp = args.channels[chan_i];
+ UHD_ASSERT_THROW(dsp == 0); //always 0
+ my_streamer->set_xport_chan_get_buff(chan_i, boost::bind(
+ &zero_copy_if::get_send_buff, _data_transport, _1
+ ));
+ _tx_streamers[dsp] = my_streamer; //store weak pointer
+ }
+
+ //sets all tick and samp rates on this streamer
+ this->update_rates();
+
+ return my_streamer;
+}
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