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-rw-r--r--host/lib/usrp/e100/io_impl.cpp366
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diff --git a/host/lib/usrp/e100/io_impl.cpp b/host/lib/usrp/e100/io_impl.cpp
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+//
+// Copyright 2010-2012 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 "async_packet_handler.hpp"
+#include "../../transport/super_recv_packet_handler.hpp"
+#include "../../transport/super_send_packet_handler.hpp"
+#include <linux/usrp_e.h> //ioctl structures and constants
+#include "e100_impl.hpp"
+#include "e100_regs.hpp"
+#include <uhd/utils/msg.hpp>
+#include <uhd/utils/log.hpp>
+#include <uhd/utils/tasks.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/thread.hpp>
+#include <poll.h> //poll
+#include <fcntl.h> //open, close
+#include <sstream>
+#include <fstream>
+#include <boost/make_shared.hpp>
+
+using namespace uhd;
+using namespace uhd::usrp;
+using namespace uhd::transport;
+
+/***********************************************************************
+ * io impl details (internal to this file)
+ * - pirate crew of 1
+ * - bounded buffer
+ * - thread loop
+ * - vrt packet handler states
+ **********************************************************************/
+struct e100_impl::io_impl{
+ io_impl(void):
+ false_alarm(0), async_msg_fifo(1000/*messages deep*/)
+ { /* NOP */ }
+
+ double tick_rate; //set by update tick rate method
+ e100_ctrl::sptr iface; //so handle irq can peek and poke
+ void handle_irq(void);
+ size_t false_alarm;
+ //The data transport is listed first so that it is deconstructed last,
+ //which is after the states and booty which may hold managed buffers.
+ recv_packet_demuxer::sptr demuxer;
+
+ //a pirate's life is the life for me!
+ void recv_pirate_loop(
+ spi_iface::sptr //keep a sptr to iface which shares gpio147
+ ){
+ //open the GPIO and set it up for an IRQ
+ std::ofstream edge_file("/sys/class/gpio/gpio147/edge");
+ edge_file << "rising" << std::endl << std::flush;
+ edge_file.close();
+ int fd = ::open("/sys/class/gpio/gpio147/value", O_RDONLY);
+ if (fd < 0) UHD_MSG(error) << "Unable to open GPIO for IRQ\n";
+
+ while (not boost::this_thread::interruption_requested()){
+ pollfd pfd;
+ pfd.fd = fd;
+ pfd.events = POLLPRI | POLLERR;
+ ssize_t ret = ::poll(&pfd, 1, 100/*ms*/);
+ if (ret > 0) this->handle_irq();
+ }
+
+ //cleanup before thread exit
+ ::close(fd);
+ }
+ bounded_buffer<async_metadata_t> async_msg_fifo;
+ task::sptr pirate_task;
+};
+
+void e100_impl::io_impl::handle_irq(void){
+ //check the status of the async msg buffer
+ const boost::uint32_t status = iface->peek32(E100_REG_RB_ERR_STATUS);
+ if ((status & 0x3) == 0){ //not done or error
+ //This could be a false-alarm because spi readback is mixed in.
+ //So we just sleep for a bit rather than interrupt continuously.
+ if (false_alarm++ > 3) boost::this_thread::sleep(boost::posix_time::milliseconds(1));
+ return;
+ }
+ false_alarm = 0; //its a real message, reset the count...
+ //std::cout << boost::format("status: 0x%x") % status << std::endl;
+
+ //load the data struct and call the ioctl
+ usrp_e_ctl32 data;
+ data.offset = E100_REG_ERR_BUFF;
+ data.count = status >> 16;
+ iface->ioctl(USRP_E_READ_CTL32, &data);
+ //for (size_t i = 0; i < data.count; i++){
+ //data.buf[i] = iface->peek32(E100_REG_ERR_BUFF + i*sizeof(boost::uint32_t));
+ //std::cout << boost::format(" buff[%u] = 0x%08x\n") % i % data.buf[i];
+ //}
+
+ //unpack the vrt header and process below...
+ vrt::if_packet_info_t if_packet_info;
+ if_packet_info.num_packet_words32 = data.count;
+ try{vrt::if_hdr_unpack_le(data.buf, if_packet_info);}
+ catch(const std::exception &e){
+ UHD_MSG(error) << "Error unpacking vrt header:\n" << e.what() << std::endl;
+ goto prepare;
+ }
+
+ //handle a tx async report message
+ if (if_packet_info.sid == E100_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;
+ load_metadata_from_buff(uhd::wtohx<boost::uint32_t>, metadata, if_packet_info, data.buf, tick_rate);
+
+ //push the message onto the queue
+ async_msg_fifo.push_with_pop_on_full(metadata);
+
+ //print some fastpath messages
+ standard_async_msg_prints(metadata);
+ }
+
+ //prepare for the next round
+ prepare:
+ iface->poke32(E100_REG_SR_ERR_CTRL, 1 << 0); //clear
+ while ((iface->peek32(E100_REG_RB_ERR_STATUS) & (1 << 2)) == 0){} //wait for idle
+ iface->poke32(E100_REG_SR_ERR_CTRL, 1 << 1); //start
+}
+
+/***********************************************************************
+ * Helper Functions
+ **********************************************************************/
+void e100_impl::io_init(void){
+
+ //create new io impl
+ _io_impl = UHD_PIMPL_MAKE(io_impl, ());
+ _io_impl->demuxer = recv_packet_demuxer::make(_data_transport, _rx_dsps.size(), E100_RX_SID_BASE);
+ _io_impl->iface = _fpga_ctrl;
+
+ //clear fifo state machines
+ _fpga_ctrl->poke32(E100_REG_CLEAR_FIFO, 0);
+
+ //allocate streamer weak ptrs containers
+ _rx_streamers.resize(_rx_dsps.size());
+ _tx_streamers.resize(1/*known to be 1 dsp*/);
+
+ //prepare the async msg buffer for incoming messages
+ _fpga_ctrl->poke32(E100_REG_SR_ERR_CTRL, 1 << 0); //clear
+ while ((_fpga_ctrl->peek32(E100_REG_RB_ERR_STATUS) & (1 << 2)) == 0){} //wait for idle
+ _fpga_ctrl->poke32(E100_REG_SR_ERR_CTRL, 1 << 1); //start
+
+ //spawn a pirate, yarrr!
+ _io_impl->pirate_task = task::make(boost::bind(
+ &e100_impl::io_impl::recv_pirate_loop, _io_impl.get(), _aux_spi_iface
+ ));
+}
+
+void e100_impl::update_tick_rate(const double rate){
+ _io_impl->tick_rate = 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 e100_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 e100_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);
+ const double adj = _tx_dsp->get_scaling_adjustment();
+ my_streamer->set_scale_factor(adj);
+}
+
+void e100_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 e100_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 e100_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 Recv
+ **********************************************************************/
+bool e100_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 e100_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;
+
+ //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
+ - sizeof(vrt::if_packet_info_t().tsi) //no int time ever used
+ ;
+ const size_t bpp = _data_transport->get_recv_frame_size() - hdr_size;
+ const size_t bpi = convert::get_bytes_per_item(args.otw_format);
+ const size_t spp = unsigned(args.args.cast<double>("spp", bpp/bpi));
+
+ //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]->setup(args);
+ my_streamer->set_xport_chan_get_buff(chan_i, boost::bind(
+ &recv_packet_demuxer::get_recv_buff, _io_impl->demuxer, dsp, _1
+ ), true /*flush*/);
+ 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 e100_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;
+
+ //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().sid) //no stream id ever used
+ - sizeof(vrt::if_packet_info_t().cid) //no class id ever used
+ - sizeof(vrt::if_packet_info_t().tsi) //no int time ever used
+ ;
+ static const size_t bpp = _data_transport->get_send_frame_size() - 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
+ _tx_dsp->setup(args);
+ 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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