diff options
Diffstat (limited to 'host/lib/usrp/usrp_e/io_impl.cpp')
| -rw-r--r-- | host/lib/usrp/usrp_e/io_impl.cpp | 129 |
1 files changed, 114 insertions, 15 deletions
diff --git a/host/lib/usrp/usrp_e/io_impl.cpp b/host/lib/usrp/usrp_e/io_impl.cpp index 1bb67d9aa..31ea4c6c0 100644 --- a/host/lib/usrp/usrp_e/io_impl.cpp +++ b/host/lib/usrp/usrp_e/io_impl.cpp @@ -18,6 +18,8 @@ #include "usrp_e_impl.hpp" #include "usrp_e_regs.hpp" #include <uhd/usrp/dsp_utils.hpp> +#include <uhd/utils/thread_priority.hpp> +#include <uhd/transport/bounded_buffer.hpp> #include "../../transport/vrt_packet_handler.hpp" #include <boost/bind.hpp> #include <fcntl.h> //read, write @@ -28,12 +30,15 @@ using namespace uhd; using namespace uhd::usrp; +using namespace uhd::transport; /*********************************************************************** * Constants **********************************************************************/ static const size_t MAX_BUFF_SIZE = 2048; static const bool usrp_e_io_impl_verbose = false; +static const size_t tx_async_report_sid = 1; +static const int underflow_flags = async_metadata_t::EVENT_CODE_UNDERFLOW | async_metadata_t::EVENT_CODE_UNDERFLOW_IN_PACKET; /*********************************************************************** * Data Transport (phony zero-copy with read/write) @@ -52,15 +57,15 @@ public: } size_t get_num_recv_frames(void) const{ - return 10; //FIXME no idea! + return 100; //FIXME no idea! + //this will be an important number when packet ring gets implemented } size_t get_num_send_frames(void) const{ - return 10; //FIXME no idea! + return 100; //FIXME no idea! + //this will be an important number when packet ring gets implemented } - size_t recv_timeout_ms; - private: int _fd; ssize_t send(const boost::asio::const_buffer &buff){ @@ -79,7 +84,7 @@ private: pollfd pfd; pfd.fd = _fd; pfd.events = POLLIN; - ssize_t poll_ret = poll(&pfd, 1, recv_timeout_ms); + ssize_t poll_ret = poll(&pfd, 1, 100/*ms*/); if (poll_ret <= 0){ if (usrp_e_io_impl_verbose) std::cerr << boost::format( "usrp-e io impl recv(): poll() returned non-positive value: %d\n" @@ -111,7 +116,11 @@ private: }; /*********************************************************************** - * IO Implementation Details + * io impl details (internal to this file) + * - pirate crew of 1 + * - bounded buffer + * - thread loop + * - vrt packet handler states **********************************************************************/ struct usrp_e_impl::io_impl{ //state management for the vrt packet handler code @@ -119,9 +128,88 @@ struct usrp_e_impl::io_impl{ vrt_packet_handler::send_state packet_handler_send_state; data_transport transport; bool continuous_streaming; - io_impl(int fd): packet_handler_recv_state(1), transport(fd){} + io_impl(int fd): + transport(fd), + recv_pirate_booty(recv_booty_type::make(transport.get_num_recv_frames())), + async_msg_fifo(bounded_buffer<async_metadata_t>::make(100/*messages deep*/)) + { + /* NOP */ + } + + ~io_impl(void){ + recv_pirate_crew_raiding = false; + recv_pirate_crew.interrupt_all(); + recv_pirate_crew.join_all(); + } + + bool get_recv_buffs(vrt_packet_handler::managed_recv_buffs_t &buffs, size_t timeout_ms){ + UHD_ASSERT_THROW(buffs.size() == 1); + boost::this_thread::disable_interruption di; //disable because the wait can throw + return recv_pirate_booty->pop_with_timed_wait(buffs.front(), boost::posix_time::milliseconds(timeout_ms)); + } + + //a pirate's life is the life for me! + void recv_pirate_loop(); + typedef bounded_buffer<managed_recv_buffer::sptr> recv_booty_type; + recv_booty_type::sptr recv_pirate_booty; + bounded_buffer<async_metadata_t>::sptr async_msg_fifo; + boost::thread_group recv_pirate_crew; + bool recv_pirate_crew_raiding; }; +/*********************************************************************** + * Receive Pirate Loop + * - while raiding, loot for recv buffers + * - put booty into the alignment buffer + **********************************************************************/ +void usrp_e_impl::io_impl::recv_pirate_loop( + +){ + set_thread_priority_safe(); + recv_pirate_crew_raiding = true; + //size_t next_packet_seq = 0; + + while(recv_pirate_crew_raiding){ + managed_recv_buffer::sptr buff = this->transport.get_recv_buff(); + if (not buff.get()) continue; //ignore timeout/error buffers + + try{ + //extract the vrt header packet info + vrt::if_packet_info_t if_packet_info; + if_packet_info.num_packet_words32 = buff->size()/sizeof(boost::uint32_t); + const boost::uint32_t *vrt_hdr = buff->cast<const boost::uint32_t *>(); + vrt::if_hdr_unpack_le(vrt_hdr, if_packet_info); + + //handle a tx async report message + if (if_packet_info.sid == tx_async_report_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), MASTER_CLOCK_RATE + ); + metadata.event_code = vrt_packet_handler::get_context_code<async_metadata_t::event_code_t>(vrt_hdr, if_packet_info); + + //print the famous U, and push the metadata into the message queue + if (metadata.event_code & underflow_flags) std::cerr << "U" << std::flush; + async_msg_fifo->push_with_pop_on_full(metadata); + continue; + } + + }catch(const std::exception &e){ + std::cerr << "Error (usrp-e recv pirate loop): " << e.what() << std::endl; + } + + //usrp-e back-pressures on receive: push with wait + recv_pirate_booty->push_with_wait(buff); + } +} + +/*********************************************************************** + * Helper Functions + **********************************************************************/ void usrp_e_impl::io_init(void){ //setup rx data path _iface->poke32(UE_REG_CTRL_RX_NSAMPS_PER_PKT, get_max_recv_samps_per_packet()); @@ -136,7 +224,16 @@ void usrp_e_impl::io_init(void){ _iface->poke32(UE_REG_CTRL_RX_VRT_STREAM_ID, 0); _iface->poke32(UE_REG_CTRL_RX_VRT_TRAILER, 0); + //setup the tx policy + _iface->poke32(UE_REG_CTRL_TX_REPORT_SID, tx_async_report_sid); + _iface->poke32(UE_REG_CTRL_TX_POLICY, UE_FLAG_CTRL_TX_POLICY_NEXT_PACKET); + _io_impl = UHD_PIMPL_MAKE(io_impl, (_iface->get_file_descriptor())); + + //spawn a pirate, yarrr! + _io_impl->recv_pirate_crew.create_thread(boost::bind( + &usrp_e_impl::io_impl::recv_pirate_loop, _io_impl.get() + )); } void usrp_e_impl::issue_stream_cmd(const stream_cmd_t &stream_cmd){ @@ -217,9 +314,6 @@ size_t usrp_e_impl::recv( recv_otw_type.shift = 0; recv_otw_type.byteorder = otw_type_t::BO_LITTLE_ENDIAN; - //hand-off the timeout to the transport - _io_impl->transport.recv_timeout_ms = timeout_ms; - return vrt_packet_handler::recv( _io_impl->packet_handler_recv_state, //last state of the recv handler buffs, num_samps, //buffer to fill @@ -227,15 +321,20 @@ size_t usrp_e_impl::recv( io_type, recv_otw_type, //input and output types to convert MASTER_CLOCK_RATE, //master clock tick rate uhd::transport::vrt::if_hdr_unpack_le, - boost::bind(&get_recv_buffs, &_io_impl->transport, _1), + boost::bind(&usrp_e_impl::io_impl::get_recv_buffs, _io_impl.get(), _1, timeout_ms), boost::bind(&usrp_e_impl::handle_overrun, this, _1) ); } /*********************************************************************** - * Dummy Async Recv + * Async Recv **********************************************************************/ -bool usrp_e_impl::recv_async_msg(async_metadata_t &, size_t timeout_ms){ - boost::this_thread::sleep(boost::posix_time::milliseconds(timeout_ms)); - return false; +bool usrp_e_impl::recv_async_msg( + async_metadata_t &async_metadata, + size_t timeout_ms +){ + boost::this_thread::disable_interruption di; //disable because the wait can throw + return _io_impl->async_msg_fifo->pop_with_timed_wait( + async_metadata, boost::posix_time::milliseconds(timeout_ms) + ); } |