diff options
Diffstat (limited to 'host/lib/usrp/x300/x300_impl.hpp')
| -rw-r--r-- | host/lib/usrp/x300/x300_impl.hpp | 51 |
1 files changed, 31 insertions, 20 deletions
diff --git a/host/lib/usrp/x300/x300_impl.hpp b/host/lib/usrp/x300/x300_impl.hpp index 37f8cc468..1fb3676a0 100644 --- a/host/lib/usrp/x300/x300_impl.hpp +++ b/host/lib/usrp/x300/x300_impl.hpp @@ -58,21 +58,23 @@ static const double X300_BUS_CLOCK_RATE = 175e6; //Hz static const size_t X300_TX_HW_BUFF_SIZE = 0x90000; //576KiB static const size_t X300_TX_FC_RESPONSE_FREQ = 8; //per flow-control window -static const size_t X300_RX_SW_BUFF_SIZE_ETH = 0x2000000; //32MiB For an ~8k MTU any size >32MiB is just wasted buffer space -static const size_t X300_RX_SW_BUFF_SIZE_ETH_MACOS = 0x100000; //1Mib -static const double X300_RX_SW_BUFF_FULL_FACTOR = 0.90; //Buffer should ideally be 90% full. -static const size_t X300_RX_FC_REQUEST_FREQ = 32; //per flow-control window - -static const size_t X300_PCIE_DATA_FRAME_SIZE = 8192; //bytes -static const size_t X300_PCIE_DATA_NUM_FRAMES = 2048; -static const size_t X300_PCIE_MSG_FRAME_SIZE = 256; //bytes -static const size_t X300_PCIE_MSG_NUM_FRAMES = 32; - -static const size_t X300_ETH_DATA_FRAME_SIZE = 8000; //bytes -static const size_t X300_ETH_DATA_NUM_FRAMES = 32; -static const size_t X300_ETH_MSG_FRAME_SIZE = uhd::transport::udp_simple::mtu; //bytes -static const size_t X300_ETH_MSG_NUM_FRAMES = 32; -static const double X300_DEFAULT_SYSREF_RATE = 10e6; +static const size_t X300_RX_SW_BUFF_SIZE_ETH = 0x2000000;//32MiB For an ~8k frame size any size >32MiB is just wasted buffer space +static const size_t X300_RX_SW_BUFF_SIZE_ETH_MACOS = 0x100000; //1Mib +static const double X300_RX_SW_BUFF_FULL_FACTOR = 0.90; //Buffer should ideally be 90% full. +static const size_t X300_RX_FC_REQUEST_FREQ = 32; //per flow-control window + +static const size_t X300_PCIE_DATA_FRAME_SIZE = 8192; //bytes +static const size_t X300_PCIE_DATA_NUM_FRAMES = 2048; +static const size_t X300_PCIE_MSG_FRAME_SIZE = 256; //bytes +static const size_t X300_PCIE_MSG_NUM_FRAMES = 32; + +static const size_t X300_10GE_DATA_FRAME_MAX_SIZE = 8000; //bytes +static const size_t X300_1GE_DATA_FRAME_MAX_SIZE = 1472; //bytes +static const size_t X300_ETH_MSG_FRAME_SIZE = uhd::transport::udp_simple::mtu; //bytes + +static const size_t X300_ETH_MSG_NUM_FRAMES = 32; +static const size_t X300_ETH_DATA_NUM_FRAMES = 32; +static const double X300_DEFAULT_SYSREF_RATE = 10e6; #define X300_RADIO_DEST_PREFIX_TX 0 #define X300_RADIO_DEST_PREFIX_CTRL 1 @@ -207,6 +209,9 @@ private: int clock_control_regs__pps_out_enb; int clock_control_regs__tcxo_enb; int clock_control_regs__gpsdo_pwr; + + //which FPGA image is loaded + std::string loaded_fpga_image; }; std::vector<mboard_members_t> _mb; @@ -243,13 +248,19 @@ private: const uhd::device_addr_t& args, boost::uint32_t& sid); - struct mtu_result_t + struct frame_size_t { - size_t recv_mtu; - size_t send_mtu; + size_t recv_frame_size; + size_t send_frame_size; }; - - mtu_result_t determine_mtu(const std::string &addr, const mtu_result_t &user_mtu); + frame_size_t max_frame_sizes; + + /*! + * Automatically determine the maximum frame size available by sending a UDP packet + * to the device and see which packet sizes actually work. This way, we can take + * switches etc. into account which might live between the device and the host. + */ + frame_size_t determine_max_frame_size(const std::string &addr, const frame_size_t &user_mtu); //////////////////////////////////////////////////////////////////// // |