diff options
Diffstat (limited to 'host/lib/rfnoc/chdr')
-rw-r--r-- | host/lib/rfnoc/chdr/CMakeLists.txt | 15 | ||||
-rw-r--r-- | host/lib/rfnoc/chdr/chdr_packet.cpp | 213 | ||||
-rw-r--r-- | host/lib/rfnoc/chdr/chdr_types.cpp | 426 |
3 files changed, 654 insertions, 0 deletions
diff --git a/host/lib/rfnoc/chdr/CMakeLists.txt b/host/lib/rfnoc/chdr/CMakeLists.txt new file mode 100644 index 000000000..fca46fe4a --- /dev/null +++ b/host/lib/rfnoc/chdr/CMakeLists.txt @@ -0,0 +1,15 @@ +# +# Copyright 2014-2015,2017 Ettus Research LLC +# Copyright 2018 Ettus Research, a National Instruments Company +# +# SPDX-License-Identifier: GPL-3.0-or-later +# + +######################################################################## +# This file included, use CMake directory variables +######################################################################## + +LIBUHD_APPEND_SOURCES( + ${CMAKE_CURRENT_SOURCE_DIR}/chdr_types.cpp + ${CMAKE_CURRENT_SOURCE_DIR}/chdr_packet.cpp +) diff --git a/host/lib/rfnoc/chdr/chdr_packet.cpp b/host/lib/rfnoc/chdr/chdr_packet.cpp new file mode 100644 index 000000000..b058115ab --- /dev/null +++ b/host/lib/rfnoc/chdr/chdr_packet.cpp @@ -0,0 +1,213 @@ +// +// Copyright 2019 Ettus Research, a National Instruments Brand +// +// SPDX-License-Identifier: GPL-3.0-or-later +// + +#include <uhdlib/rfnoc/chdr/chdr_packet.hpp> +#include <cassert> +#include <functional> +#include <memory> + +using namespace uhd; +using namespace uhd::rfnoc::chdr; + +chdr_packet::~chdr_packet() = default; + +//------------------------------------------------------------ +// chdr_packet +//------------------------------------------------------------ + +template <size_t chdr_w, endianness_t endianness> +class chdr_packet_impl : public chdr_packet +{ +public: + chdr_packet_impl() = delete; + chdr_packet_impl(size_t mtu_bytes) : _mtu_bytes(mtu_bytes) {} + ~chdr_packet_impl() = default; + + virtual void refresh(const void* pkt_buff) const + { + assert(pkt_buff); + _pkt_buff = const_cast<uint64_t*>(reinterpret_cast<const uint64_t*>(pkt_buff)); + _compute_mdata_offset(); + } + + virtual void refresh(void* pkt_buff, chdr_header& header, uint64_t timestamp = 0) + { + assert(pkt_buff); + _pkt_buff = reinterpret_cast<uint64_t*>(pkt_buff); + _pkt_buff[0] = u64_from_host(header); + if (_has_timestamp(header)) { + _pkt_buff[1] = timestamp; + } + _compute_mdata_offset(); + } + + virtual void update_payload_size(size_t payload_size_bytes) + { + chdr_header header = get_chdr_header(); + header.set_length(((_mdata_offset + header.get_num_mdata()) * chdr_w_bytes) + + payload_size_bytes); + _pkt_buff[0] = u64_from_host(header); + } + + virtual endianness_t get_byte_order() const + { + return endianness; + } + + virtual size_t get_mtu_bytes() const + { + return _mtu_bytes; + } + + virtual chdr_header get_chdr_header() const + { + assert(_pkt_buff); + return std::move(chdr_header(u64_to_host(_pkt_buff[0]))); + } + + virtual boost::optional<uint64_t> get_timestamp() const + { + if (_has_timestamp(get_chdr_header())) { + // In a unit64_t buffer, the timestamp is always immediately after the header + // regardless of chdr_w. + return u64_to_host(_pkt_buff[1]); + } else { + return boost::none; + } + } + + virtual size_t get_mdata_size() const + { + return get_chdr_header().get_num_mdata() * chdr_w_bytes; + } + + virtual const void* get_mdata_const_ptr() const + { + return const_cast<void*>( + const_cast<chdr_packet_impl<chdr_w, endianness>*>(this)->get_mdata_ptr()); + } + + virtual void* get_mdata_ptr() + { + return reinterpret_cast<void*>(_pkt_buff + (chdr_w_stride * _mdata_offset)); + } + + virtual size_t get_payload_size() const + { + return get_chdr_header().get_length() - get_mdata_size() + - (chdr_w_bytes * _mdata_offset); + } + + virtual const void* get_payload_const_ptr() const + { + return const_cast<void*>( + const_cast<chdr_packet_impl<chdr_w, endianness>*>(this)->get_payload_ptr()); + } + + virtual void* get_payload_ptr() + { + return reinterpret_cast<void*>( + _pkt_buff + + (chdr_w_stride * (_mdata_offset + get_chdr_header().get_num_mdata()))); + } + +private: + inline bool _has_timestamp(const chdr_header& header) const + { + return (header.get_pkt_type() == PKT_TYPE_DATA_WITH_TS); + } + + inline void _compute_mdata_offset() const + { + // The metadata offset depends on the chdr_w and whether we have a timestamp + if (chdr_w == 64) { + _mdata_offset = _has_timestamp(get_chdr_header()) ? 2 : 1; + } else { + _mdata_offset = 1; + } + } + + inline static uint64_t u64_to_host(uint64_t word) + { + return (endianness == ENDIANNESS_BIG) ? uhd::ntohx<uint64_t>(word) + : uhd::wtohx<uint64_t>(word); + } + + inline static uint64_t u64_from_host(uint64_t word) + { + return (endianness == ENDIANNESS_BIG) ? uhd::htonx<uint64_t>(word) + : uhd::htowx<uint64_t>(word); + } + + static const size_t chdr_w_bytes = (chdr_w / 8); + static const size_t chdr_w_stride = (chdr_w / 64); + + // Packet state + const size_t _mtu_bytes = 0; + mutable uint64_t* _pkt_buff = nullptr; + mutable size_t _mdata_offset = 0; +}; + +chdr_packet_factory::chdr_packet_factory(chdr_w_t chdr_w, endianness_t endianness) + : _chdr_w(chdr_w), _endianness(endianness) +{ +} + +chdr_packet::uptr chdr_packet_factory::make_generic(size_t mtu_bytes) const +{ + if (_endianness == ENDIANNESS_BIG) { + switch (_chdr_w) { + case CHDR_W_512: + return std::make_unique<chdr_packet_impl<512, ENDIANNESS_BIG>>(mtu_bytes); + case CHDR_W_256: + return std::make_unique<chdr_packet_impl<256, ENDIANNESS_BIG>>(mtu_bytes); + case CHDR_W_128: + return std::make_unique<chdr_packet_impl<128, ENDIANNESS_BIG>>(mtu_bytes); + case CHDR_W_64: + return std::make_unique<chdr_packet_impl<64, ENDIANNESS_BIG>>(mtu_bytes); + default: + assert(0); + } + } else { + switch (_chdr_w) { + case CHDR_W_512: + return std::make_unique<chdr_packet_impl<512, ENDIANNESS_LITTLE>>( + mtu_bytes); + case CHDR_W_256: + return std::make_unique<chdr_packet_impl<256, ENDIANNESS_LITTLE>>( + mtu_bytes); + case CHDR_W_128: + return std::make_unique<chdr_packet_impl<128, ENDIANNESS_LITTLE>>( + mtu_bytes); + case CHDR_W_64: + return std::make_unique<chdr_packet_impl<64, ENDIANNESS_LITTLE>>( + mtu_bytes); + default: + assert(0); + } + } + return chdr_packet::uptr(); +} + +chdr_ctrl_packet::uptr chdr_packet_factory::make_ctrl(size_t mtu_bytes) const +{ + return std::make_unique<chdr_ctrl_packet>(make_generic(mtu_bytes)); +} + +chdr_strs_packet::uptr chdr_packet_factory::make_strs(size_t mtu_bytes) const +{ + return std::make_unique<chdr_strs_packet>(make_generic(mtu_bytes)); +} + +chdr_strc_packet::uptr chdr_packet_factory::make_strc(size_t mtu_bytes) const +{ + return std::make_unique<chdr_strc_packet>(make_generic(mtu_bytes)); +} + +chdr_mgmt_packet::uptr chdr_packet_factory::make_mgmt(size_t mtu_bytes) const +{ + return std::make_unique<chdr_mgmt_packet>(make_generic(mtu_bytes)); +} diff --git a/host/lib/rfnoc/chdr/chdr_types.cpp b/host/lib/rfnoc/chdr/chdr_types.cpp new file mode 100644 index 000000000..8786b8193 --- /dev/null +++ b/host/lib/rfnoc/chdr/chdr_types.cpp @@ -0,0 +1,426 @@ +// +// Copyright 2019 Ettus Research, a National Instruments Brand +// +// SPDX-License-Identifier: GPL-3.0-or-later +// + +#include <uhd/exception.hpp> +#include <uhd/types/endianness.hpp> +#include <uhdlib/rfnoc/chdr/chdr_types.hpp> +#include <boost/format.hpp> +#include <cassert> + +using namespace uhd; +using namespace uhd::rfnoc::chdr; + +//---------------------------------------------------- +// Utility Functions +//---------------------------------------------------- + +static inline constexpr uint64_t mask_u64(size_t width) +{ + return ((uint64_t(1) << width) - 1); +} + +template <typename field_t> +static inline constexpr field_t get_field_u64( + uint64_t flat_hdr, size_t offset, size_t width) +{ + return static_cast<field_t>((flat_hdr >> offset) & mask_u64(width)); +} + +//---------------------------------------------------- +// CHDR Control Payload +//---------------------------------------------------- + +void ctrl_payload::populate_header(chdr_header& header) const +{ + header.set_pkt_type(PKT_TYPE_CTRL); + header.set_eob(false); + header.set_eov(false); + header.set_num_mdata(0); +} + +size_t ctrl_payload::serialize(uint64_t* buff, + size_t max_size_bytes, + const std::function<uint64_t(uint64_t)>& conv_byte_order) const +{ + UHD_ASSERT_THROW((data_vtr.size() > 0 && data_vtr.size() < 16)); + // We assume that buff has room to hold the entire packet + size_t ptr = 0; + + // Populate control header + buff[ptr++] = conv_byte_order( + ((static_cast<uint64_t>(dst_port) & mask_u64(DST_PORT_WIDTH)) << DST_PORT_OFFSET) + | ((static_cast<uint64_t>(src_port) & mask_u64(SRC_PORT_WIDTH)) + << SRC_PORT_OFFSET) + | ((static_cast<uint64_t>(data_vtr.size()) & mask_u64(NUM_DATA_WIDTH)) + << NUM_DATA_OFFSET) + | ((static_cast<uint64_t>(seq_num) & mask_u64(SEQ_NUM_WIDTH)) << SEQ_NUM_OFFSET) + | ((static_cast<uint64_t>(timestamp ? 1 : 0) & mask_u64(HAS_TIME_WIDTH)) + << HAS_TIME_OFFSET) + | ((static_cast<uint64_t>(is_ack) & mask_u64(IS_ACK_WIDTH)) << IS_ACK_OFFSET) + | ((static_cast<uint64_t>(src_epid) & mask_u64(SRC_EPID_WIDTH)) + << SRC_EPID_OFFSET)); + + // Populate optional timestamp + if (timestamp.is_initialized()) { + buff[ptr++] = conv_byte_order(timestamp.get()); + } + + // Populate control operation word + buff[ptr++] = conv_byte_order( + ((static_cast<uint64_t>(address) & mask_u64(ADDRESS_WIDTH)) << ADDRESS_OFFSET) + | ((static_cast<uint64_t>(byte_enable) & mask_u64(BYTE_ENABLE_WIDTH)) + << BYTE_ENABLE_OFFSET) + | ((static_cast<uint64_t>(op_code) & mask_u64(OPCODE_WIDTH)) << OPCODE_OFFSET) + | ((static_cast<uint64_t>(status) & mask_u64(STATUS_WIDTH)) << STATUS_OFFSET) + | (static_cast<uint64_t>(data_vtr[0]) << HI_DATA_OFFSET)); + + // Populate the rest of the data + for (size_t i = 1; i < data_vtr.size(); i += 2) { + const uint32_t hi_data = + (((i + 2) >= data_vtr.size()) && (data_vtr.size() % 2 == 0)) + ? 0 + : data_vtr[i + 1]; + buff[ptr++] = + conv_byte_order(static_cast<uint64_t>(hi_data) << HI_DATA_OFFSET + | static_cast<uint64_t>(data_vtr[i]) << LO_DATA_OFFSET); + } + + // FIXME: This UHD_ASSERT_THROW is a bit late because memory has already been + // corrupted + UHD_ASSERT_THROW(ptr <= max_size_bytes); + // Return bytes written + return (ptr * sizeof(uint64_t)); +} + +void ctrl_payload::deserialize(const uint64_t* buff, + size_t max_size_bytes, + const std::function<uint64_t(uint64_t)>& conv_byte_order) +{ + // We assume that buff has room to hold the entire packet + size_t ptr = 0; + + // Read control header + uint64_t ctrl_header = conv_byte_order(buff[ptr++]); + data_vtr.resize(get_field_u64<size_t>(ctrl_header, NUM_DATA_OFFSET, NUM_DATA_WIDTH)); + UHD_ASSERT_THROW((data_vtr.size() > 0 && data_vtr.size() < 16)); + dst_port = get_field_u64<uint16_t>(ctrl_header, DST_PORT_OFFSET, DST_PORT_WIDTH); + src_port = get_field_u64<uint16_t>(ctrl_header, SRC_PORT_OFFSET, SRC_PORT_WIDTH); + seq_num = get_field_u64<uint8_t>(ctrl_header, SEQ_NUM_OFFSET, SEQ_NUM_WIDTH); + is_ack = get_field_u64<bool>(ctrl_header, IS_ACK_OFFSET, IS_ACK_WIDTH); + src_epid = get_field_u64<uint16_t>(ctrl_header, SRC_EPID_OFFSET, SRC_EPID_WIDTH); + + // Read optional timestamp + if (get_field_u64<bool>(ctrl_header, HAS_TIME_OFFSET, HAS_TIME_WIDTH)) { + timestamp = conv_byte_order(buff[ptr++]); + } else { + timestamp = boost::none; + } + + // Read control operation word + uint64_t op_word = conv_byte_order(buff[ptr++]); + if (data_vtr.size() > 0) { + data_vtr[0] = get_field_u64<uint32_t>(op_word, HI_DATA_OFFSET, 32); + } + address = get_field_u64<uint32_t>(op_word, ADDRESS_OFFSET, ADDRESS_WIDTH); + byte_enable = get_field_u64<uint8_t>(op_word, BYTE_ENABLE_OFFSET, BYTE_ENABLE_WIDTH); + op_code = get_field_u64<ctrl_opcode_t>(op_word, OPCODE_OFFSET, OPCODE_WIDTH); + status = get_field_u64<ctrl_status_t>(op_word, STATUS_OFFSET, STATUS_WIDTH); + + // Read the rest of the data + for (size_t i = 1; i < data_vtr.size(); i += 2) { + uint64_t data_word = conv_byte_order(buff[ptr++]); + if (((i + 2) < data_vtr.size()) || (data_vtr.size() % 2 != 0)) { + data_vtr[i + 1] = get_field_u64<uint32_t>(data_word, HI_DATA_OFFSET, 32); + } + data_vtr[i] = get_field_u64<uint32_t>(data_word, LO_DATA_OFFSET, 32); + } + UHD_ASSERT_THROW(ptr <= max_size_bytes); +} + +bool ctrl_payload::operator==(const ctrl_payload& rhs) const +{ + return (dst_port == rhs.dst_port) && (src_port == rhs.src_port) + && (seq_num == rhs.seq_num) + && (timestamp.is_initialized() == rhs.timestamp.is_initialized()) + && ((!timestamp.is_initialized()) || (timestamp.get() == rhs.timestamp.get())) + && (is_ack == rhs.is_ack) && (src_epid == rhs.src_epid) + && (address == rhs.address) && (data_vtr == rhs.data_vtr) + && (byte_enable == rhs.byte_enable) && (op_code == rhs.op_code) + && (status == rhs.status); +} + +const std::string ctrl_payload::to_string() const +{ + return str( + boost::format("ctrl_payload{dst_port:%d, dst_port:%d, seq_num:%d, timestamp:%s, " + "is_ack:%s, src_epid:%d, address:0x%05x, byte_enable:0x%x, " + "op_code:%d, status:%d, data[0]:0x%08x}\n") + % dst_port % src_port % int(seq_num) + % (timestamp.is_initialized() ? str(boost::format("0x%016x") % timestamp.get()) + : std::string("<not present>")) + % (is_ack ? "true" : "false") % src_epid % address % int(byte_enable) % op_code + % status % data_vtr[0]); +} + +//---------------------------------------------------- +// CHDR Stream Status Payload +//---------------------------------------------------- + +void strs_payload::populate_header(chdr_header& header) const +{ + header.set_pkt_type(PKT_TYPE_STRS); + header.set_eob(false); + header.set_eov(false); + header.set_num_mdata(0); +} + +size_t strs_payload::serialize(uint64_t* buff, + size_t max_size_bytes, + const std::function<uint64_t(uint64_t)>& conv_byte_order) const +{ + UHD_ASSERT_THROW(max_size_bytes >= (4 * sizeof(uint64_t))); + + // Populate first word + buff[0] = conv_byte_order( + ((static_cast<uint64_t>(src_epid) & mask_u64(SRC_EPID_WIDTH)) << SRC_EPID_OFFSET) + | ((static_cast<uint64_t>(status) & mask_u64(STATUS_WIDTH)) << STATUS_OFFSET) + | ((static_cast<uint64_t>(capacity_bytes) & mask_u64(CAPACITY_BYTES_WIDTH)) + << CAPACITY_BYTES_OFFSET)); + + // Populate second word + buff[1] = conv_byte_order( + ((static_cast<uint64_t>(capacity_pkts) & mask_u64(CAPACITY_PKTS_WIDTH)) + << CAPACITY_PKTS_OFFSET) + | ((static_cast<uint64_t>(xfer_count_pkts) & mask_u64(XFER_COUNT_PKTS_WIDTH)) + << XFER_COUNT_PKTS_OFFSET)); + + // Populate third word + buff[2] = conv_byte_order(xfer_count_bytes); + + // Populate fourth word + buff[3] = conv_byte_order( + ((static_cast<uint64_t>(buff_info) & mask_u64(BUFF_INFO_WIDTH)) + << BUFF_INFO_OFFSET) + | ((static_cast<uint64_t>(status_info) & mask_u64(STATUS_INFO_WIDTH)) + << STATUS_INFO_OFFSET)); + + // Return bytes written + return (4 * sizeof(uint64_t)); +} + +void strs_payload::deserialize(const uint64_t* buff, + size_t num_elems, + const std::function<uint64_t(uint64_t)>& conv_byte_order) +{ + UHD_ASSERT_THROW(num_elems >= 4); + + // Read first word + uint64_t word0 = conv_byte_order(buff[0]); + src_epid = get_field_u64<uint16_t>(word0, SRC_EPID_OFFSET, SRC_EPID_WIDTH); + status = get_field_u64<strs_status_t>(word0, STATUS_OFFSET, STATUS_WIDTH); + capacity_bytes = + get_field_u64<uint64_t>(word0, CAPACITY_BYTES_OFFSET, CAPACITY_BYTES_WIDTH); + + // Read second word + uint64_t word1 = conv_byte_order(buff[1]); + capacity_pkts = + get_field_u64<uint32_t>(word1, CAPACITY_PKTS_OFFSET, CAPACITY_PKTS_WIDTH); + xfer_count_pkts = + get_field_u64<uint64_t>(word1, XFER_COUNT_PKTS_OFFSET, XFER_COUNT_PKTS_WIDTH); + + // Read third word + xfer_count_bytes = conv_byte_order(buff[2]); + + // Read fourth word + uint64_t word3 = conv_byte_order(buff[3]); + buff_info = get_field_u64<uint16_t>(word3, BUFF_INFO_OFFSET, BUFF_INFO_WIDTH); + status_info = get_field_u64<uint64_t>(word3, STATUS_INFO_OFFSET, STATUS_INFO_WIDTH); +} + +bool strs_payload::operator==(const strs_payload& rhs) const +{ + return (src_epid == rhs.src_epid) && (status == rhs.status) + && (capacity_bytes == rhs.capacity_bytes) + && (capacity_pkts == rhs.capacity_pkts) + && (xfer_count_pkts == rhs.xfer_count_pkts) + && (xfer_count_bytes == rhs.xfer_count_bytes) && (buff_info == rhs.buff_info) + && (status_info == rhs.status_info); +} + +const std::string strs_payload::to_string() const +{ + return str(boost::format("strs_payload{src_epid:%lu, status:%d, capacity_bytes:%lu, " + "capacity_pkts:%lu, " + "xfer_count_pkts:%lu, xfer_count_bytes:%lu, " + "buff_info:0x%x, status_info:0x%x}\n") + % src_epid % int(status) % capacity_bytes % capacity_pkts % xfer_count_pkts + % xfer_count_bytes % buff_info % status_info); +} + +//---------------------------------------------------- +// CHDR Stream Command Payload +//---------------------------------------------------- + +void strc_payload::populate_header(chdr_header& header) const +{ + header.set_pkt_type(PKT_TYPE_STRC); + header.set_eob(false); + header.set_eov(false); + header.set_num_mdata(0); +} + +size_t strc_payload::serialize(uint64_t* buff, + size_t max_size_bytes, + const std::function<uint64_t(uint64_t)>& conv_byte_order) const +{ + UHD_ASSERT_THROW(max_size_bytes >= (2 * sizeof(uint64_t))); + + // Populate first word + buff[0] = conv_byte_order( + ((static_cast<uint64_t>(src_epid) & mask_u64(SRC_EPID_WIDTH)) << SRC_EPID_OFFSET) + | ((static_cast<uint64_t>(op_code) & mask_u64(OP_CODE_WIDTH)) << OP_CODE_OFFSET) + | ((static_cast<uint64_t>(op_data) & mask_u64(OP_DATA_WIDTH)) << OP_DATA_OFFSET) + | ((static_cast<uint64_t>(num_pkts) & mask_u64(NUM_PKTS_WIDTH)) + << NUM_PKTS_OFFSET)); + + // Populate second word + buff[1] = conv_byte_order(num_bytes); + + // Return bytes written + return (2 * sizeof(uint64_t)); +} + +void strc_payload::deserialize(const uint64_t* buff, + size_t num_elems, + const std::function<uint64_t(uint64_t)>& conv_byte_order) +{ + UHD_ASSERT_THROW(num_elems >= 2); + + // Read first word + uint64_t word0 = conv_byte_order(buff[0]); + src_epid = get_field_u64<uint16_t>(word0, SRC_EPID_OFFSET, SRC_EPID_WIDTH); + op_code = get_field_u64<strc_op_code_t>(word0, OP_CODE_OFFSET, OP_CODE_WIDTH); + op_data = get_field_u64<uint8_t>(word0, OP_DATA_OFFSET, OP_DATA_WIDTH); + num_pkts = get_field_u64<uint64_t>(word0, NUM_PKTS_OFFSET, NUM_PKTS_WIDTH); + // Read second word + num_bytes = conv_byte_order(buff[1]); +} + +bool strc_payload::operator==(const strc_payload& rhs) const +{ + return (src_epid == rhs.src_epid) && (op_code == rhs.op_code) + && (op_data == rhs.op_data) && (num_pkts == rhs.num_pkts) + && (num_bytes == rhs.num_bytes); +} + +const std::string strc_payload::to_string() const +{ + return str(boost::format("strc_payload{src_epid:%lu, op_code:%d, op_data:0x%x, " + "num_pkts:%lu, num_bytes:%lu}\n") + % src_epid % int(op_code) % int(op_data) % num_pkts % num_bytes); +} + +//---------------------------------------------------- +// CHDR Management Payload +//---------------------------------------------------- + +//! Serialize this hop into a list of 64-bit words +size_t mgmt_hop_t::serialize(std::vector<uint64_t>& target, + const std::function<uint64_t(uint64_t)>& conv_byte_order) const +{ + for (size_t i = 0; i < get_num_ops(); i++) { + target.push_back( + conv_byte_order((static_cast<uint64_t>(_ops.at(i).get_op_payload()) << 16) + | (static_cast<uint64_t>(_ops.at(i).get_op_code()) << 8) + | (static_cast<uint64_t>(get_num_ops() - i - 1) << 0))); + } + return get_num_ops(); +} + +//! Deserialize this hop into from list of 64-bit words +void mgmt_hop_t::deserialize( + std::list<uint64_t>& src, const std::function<uint64_t(uint64_t)>& conv_byte_order) +{ + _ops.clear(); + size_t ops_remaining = 0; + do { + // TODO: Change this to a legit exception + UHD_ASSERT_THROW(!src.empty()); + + uint64_t op_word = conv_byte_order(src.front()); + ops_remaining = static_cast<size_t>(op_word & 0xFF); + mgmt_op_t op(static_cast<mgmt_op_t::op_code_t>((op_word >> 8) & 0xFF), + static_cast<uint64_t>((op_word >> 16))); + _ops.push_back(op); + src.pop_front(); + } while (ops_remaining > 0); +} + +void mgmt_payload::populate_header(chdr_header& header) const +{ + header.set_pkt_type(PKT_TYPE_MGMT); + header.set_eob(false); + header.set_eov(false); + header.set_num_mdata(0); + header.set_vc(0); + header.set_dst_epid(0); +} + +size_t mgmt_payload::serialize(uint64_t* buff, + size_t max_size_bytes, + const std::function<uint64_t(uint64_t)>& conv_byte_order) const +{ + std::vector<uint64_t> target; + // Insert header + target.push_back(conv_byte_order( + (static_cast<uint64_t>(_protover) << 48) + | (static_cast<uint64_t>(static_cast<uint8_t>(_chdr_w) & 0x7) << 45) + | (static_cast<uint64_t>(get_num_hops() & 0x3FF) << 16) + | (static_cast<uint64_t>(_src_epid) << 0))); + // Insert data from each hop + for (const auto& hop : _hops) { + hop.serialize(target, conv_byte_order); + } + UHD_ASSERT_THROW(target.size() <= max_size_bytes); + + // We use a vector and copy just for ease of implementation + // These transactions are not performance critical + std::copy(target.begin(), target.end(), buff); + return (target.size() * sizeof(uint64_t)); +} + +void mgmt_payload::deserialize(const uint64_t* buff, + size_t num_elems, + const std::function<uint64_t(uint64_t)>& conv_byte_order) +{ + UHD_ASSERT_THROW(num_elems > 1); + + // We use a list and copy just for ease of implementation + // These transactions are not performance critical + std::list<uint64_t> src_list(buff, buff + num_elems); + + _hops.clear(); + + // Deframe the header + uint64_t hdr = conv_byte_order(src_list.front()); + _hops.resize(static_cast<size_t>((hdr >> 16) & 0x3FF)); + _src_epid = static_cast<sep_id_t>(hdr & 0xFFFF); + _chdr_w = static_cast<chdr_w_t>((hdr >> 45) & 0x7); + _protover = static_cast<uint16_t>((hdr >> 48) & 0xFFFF); + src_list.pop_front(); + + // Populate all hops + for (size_t i = 0; i < get_num_hops(); i++) { + _hops[i].deserialize(src_list, conv_byte_order); + } +} + +const std::string mgmt_payload::to_string() const +{ + return str(boost::format( + "mgmt_payload{src_epid:%lu, chdr_w:%d, protover:0x%x, num_hops:%lu}\n") + % _src_epid % int(_chdr_w) % _protover % _hops.size()); +} |