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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 2010-2011 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 "../../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/usrp/dsp_utils.hpp>
+#include <uhd/usrp/dsp_props.hpp>
+#include <uhd/utils/thread_priority.hpp>
+#include <uhd/transport/bounded_buffer.hpp>
+#include <boost/bind.hpp>
+#include <boost/format.hpp>
+#include <boost/thread/thread.hpp>
+#include <boost/thread/barrier.hpp>
+#include <poll.h> //poll
+#include <fcntl.h> //open, close
+#include <sstream>
+#include <fstream>
+
+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(zero_copy_if::sptr &xport):
+ data_transport(xport),
+ async_msg_fifo(100/*messages deep*/)
+ {
+ for (size_t i = 0; i < E100_NUM_RX_DSPS; i++){
+ typedef bounded_buffer<managed_recv_buffer::sptr> buffs_queue_type;
+ _buffs_queue.push_back(new buffs_queue_type(data_transport->get_num_recv_frames()));
+ }
+ }
+
+ ~io_impl(void){
+ recv_pirate_crew.interrupt_all();
+ recv_pirate_crew.join_all();
+ for (size_t i = 0; i < _buffs_queue.size(); i++){
+ delete _buffs_queue[i];
+ }
+ }
+
+ std::vector<bounded_buffer<managed_recv_buffer::sptr> *> _buffs_queue;
+
+ //gets buffer, determines if its the requested index,
+ //and either queues the buffer or returns the buffer
+ managed_recv_buffer::sptr get_recv_buff(const size_t index, const double timeout){
+ while (true){
+ managed_recv_buffer::sptr buff;
+
+ //attempt to pop a buffer from the queue
+ if (_buffs_queue[index]->pop_with_haste(buff)) return buff;
+
+ //otherwise, call into the transport
+ buff = data_transport->get_recv_buff(timeout);
+ if (buff.get() == NULL) return buff; //timeout
+
+ //check the stream id to know which channel
+ const boost::uint32_t *vrt_hdr = buff->cast<const boost::uint32_t *>();
+ const size_t rx_index = uhd::wtohx(vrt_hdr[1]) - E100_DSP_SID_BASE;
+ if (rx_index == index) return buff; //got expected message
+
+ //otherwise queue and try again
+ if (rx_index < E100_NUM_RX_DSPS) _buffs_queue[rx_index]->push_with_pop_on_full(buff);
+ else UHD_MSG(error) << "Got a data packet with known SID " << uhd::wtohx(vrt_hdr[1]) << std::endl;
+ }
+ }
+
+ //The data transport is listed first so that it is deconstructed last,
+ //which is after the states and booty which may hold managed buffers.
+ zero_copy_if::sptr data_transport;
+
+ //state management for the vrt packet handler code
+ sph::recv_packet_handler recv_handler;
+ sph::send_packet_handler send_handler;
+ bool continuous_streaming;
+
+ //a pirate's life is the life for me!
+ void recv_pirate_loop(
+ boost::barrier &spawn_barrier,
+ const boost::function<void(void)> &handle,
+ e100_iface::sptr //keep a sptr to iface which shares gpio147
+ ){
+ spawn_barrier.wait();
+
+ //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) handle();
+ }
+
+ //cleanup before thread exit
+ ::close(fd);
+ }
+ bounded_buffer<async_metadata_t> async_msg_fifo;
+ boost::thread_group recv_pirate_crew;
+};
+
+/***********************************************************************
+ * Helper Functions
+ **********************************************************************/
+void e100_impl::io_init(void){
+
+ //setup before the registers (transport called to calculate max spp)
+ _io_impl = UHD_PIMPL_MAKE(io_impl, (_data_transport));
+
+ //clear state machines
+ _iface->poke32(E100_REG_CLEAR_RX, 0);
+ _iface->poke32(E100_REG_CLEAR_TX, 0);
+
+ //prepare the async msg buffer for incoming messages
+ _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
+
+ //spawn a pirate, yarrr!
+ boost::barrier spawn_barrier(2);
+ boost::function<void(void)> handle_irq_cb = boost::bind(&e100_impl::handle_irq, this);
+ _io_impl->recv_pirate_crew.create_thread(boost::bind(
+ &e100_impl::io_impl::recv_pirate_loop, _io_impl.get(),
+ boost::ref(spawn_barrier), handle_irq_cb, _iface
+ ));
+ spawn_barrier.wait();
+ //update mapping here since it didnt b4 when io init not called first
+ update_xport_channel_mapping();
+}
+
+void e100_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) return; //not done or error
+ //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;
+ //FIXME ioctl reads words32 incorrectly _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_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), long(if_packet_info.tsf), _clock_ctrl->get_fpga_clock_rate()
+ );
+ metadata.event_code = async_metadata_t::event_code_t(sph::get_context_code(data.buf, if_packet_info));
+
+ //push the message onto the queue
+ _io_impl->async_msg_fifo.push_with_pop_on_full(metadata);
+
+ //print some fastpath messages
+ 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";
+ }
+
+ //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
+}
+
+void e100_impl::update_xport_channel_mapping(void){
+ if (_io_impl.get() == NULL) return; //not inited yet
+
+ //set all of the relevant properties on the handler
+ boost::mutex::scoped_lock recv_lock = _io_impl->recv_handler.get_scoped_lock();
+ _io_impl->recv_handler.resize(_rx_subdev_spec.size());
+ _io_impl->recv_handler.set_vrt_unpacker(&vrt::if_hdr_unpack_le);
+ _io_impl->recv_handler.set_tick_rate(_clock_ctrl->get_fpga_clock_rate());
+ //FIXME assumes homogeneous rates across all dsp
+ _io_impl->recv_handler.set_samp_rate(_rx_dsp_proxies[_rx_dsp_proxies.keys().at(0)]->get_link()[DSP_PROP_HOST_RATE].as<double>());
+ for (size_t chan = 0; chan < _io_impl->recv_handler.size(); chan++){
+ _io_impl->recv_handler.set_xport_chan_get_buff(chan, boost::bind(
+ &e100_impl::io_impl::get_recv_buff, _io_impl.get(), chan, _1
+ ));
+ _io_impl->recv_handler.set_overflow_handler(chan, boost::bind(
+ &e100_impl::handle_overrun, this, chan
+ ));
+ }
+ _io_impl->recv_handler.set_converter(_recv_otw_type);
+
+ //set all of the relevant properties on the handler
+ boost::mutex::scoped_lock send_lock = _io_impl->send_handler.get_scoped_lock();
+ _io_impl->send_handler.resize(_tx_subdev_spec.size());
+ _io_impl->send_handler.set_vrt_packer(&vrt::if_hdr_pack_le);
+ _io_impl->send_handler.set_tick_rate(_clock_ctrl->get_fpga_clock_rate());
+ //FIXME assumes homogeneous rates across all dsp
+ _io_impl->send_handler.set_samp_rate(_tx_dsp_proxies[_tx_dsp_proxies.keys().at(0)]->get_link()[DSP_PROP_HOST_RATE].as<double>());
+ for (size_t chan = 0; chan < _io_impl->send_handler.size(); chan++){
+ _io_impl->send_handler.set_xport_chan_get_buff(chan, boost::bind(
+ &uhd::transport::zero_copy_if::get_send_buff, _io_impl->data_transport, _1
+ ));
+ }
+ _io_impl->send_handler.set_converter(_send_otw_type);
+ _io_impl->send_handler.set_max_samples_per_packet(get_max_send_samps_per_packet());
+}
+
+void e100_impl::issue_ddc_stream_cmd(const stream_cmd_t &stream_cmd, const size_t index){
+ _io_impl->continuous_streaming = (stream_cmd.stream_mode == stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
+ _iface->poke32(E100_REG_RX_CTRL_STREAM_CMD(index), dsp_type1::calc_stream_cmd_word(stream_cmd));
+ _iface->poke32(E100_REG_RX_CTRL_TIME_SECS(index), boost::uint32_t(stream_cmd.time_spec.get_full_secs()));
+ _iface->poke32(E100_REG_RX_CTRL_TIME_TICKS(index), stream_cmd.time_spec.get_tick_count(_clock_ctrl->get_fpga_clock_rate()));
+}
+
+void e100_impl::handle_overrun(const size_t index){
+ if (_io_impl->continuous_streaming){
+ this->issue_ddc_stream_cmd(stream_cmd_t::STREAM_MODE_START_CONTINUOUS, index);
+ }
+}
+
+/***********************************************************************
+ * Data Send
+ **********************************************************************/
+size_t e100_impl::get_max_send_samps_per_packet(void) const{
+ 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
+ ;
+ size_t bpp = _send_frame_size - hdr_size;
+ return bpp/_send_otw_type.get_sample_size();
+}
+
+size_t e100_impl::send(
+ const send_buffs_type &buffs, size_t nsamps_per_buff,
+ const tx_metadata_t &metadata, const io_type_t &io_type,
+ send_mode_t send_mode, double timeout
+){
+ return _io_impl->send_handler.send(
+ buffs, nsamps_per_buff,
+ metadata, io_type,
+ send_mode, timeout
+ );
+}
+
+/***********************************************************************
+ * Data Recv
+ **********************************************************************/
+size_t e100_impl::get_max_recv_samps_per_packet(void) const{
+ 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
+ ;
+ size_t bpp = _recv_frame_size - hdr_size;
+ return bpp/_recv_otw_type.get_sample_size();
+}
+
+size_t e100_impl::recv(
+ const recv_buffs_type &buffs, size_t nsamps_per_buff,
+ rx_metadata_t &metadata, const io_type_t &io_type,
+ recv_mode_t recv_mode, double timeout
+){
+ return _io_impl->recv_handler.recv(
+ buffs, nsamps_per_buff,
+ metadata, io_type,
+ recv_mode, timeout
+ );
+}
+
+/***********************************************************************
+ * 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);
+}
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