3 files changed, 23 insertions, 11 deletions
diff --git a/host/lib/usrp/usrp_e100/io_impl.cpp b/host/lib/usrp/usrp_e100/io_impl.cpp
index 51ff02d3b..40b8a2393 100644
--- a/host/lib/usrp/usrp_e100/io_impl.cpp
+++ b/host/lib/usrp/usrp_e100/io_impl.cpp
@@ -31,8 +31,6 @@ using namespace uhd;
 using namespace uhd::usrp;
 using namespace uhd::transport;
 
-zero_copy_if::sptr usrp_e100_make_mmap_zero_copy(usrp_e100_iface::sptr iface);
-
 /***********************************************************************
  * Constants
  **********************************************************************/
@@ -49,8 +47,8 @@ static const bool recv_debug = false;
  * - vrt packet handler states
  **********************************************************************/
 struct usrp_e100_impl::io_impl{
-    io_impl(usrp_e100_iface::sptr iface):
-        data_xport(usrp_e100_make_mmap_zero_copy(iface)),
+    io_impl(zero_copy_if::sptr &xport):
+        data_xport(xport),
         get_recv_buffs_fcn(boost::bind(&usrp_e100_impl::io_impl::get_recv_buffs, this, _1)),
         get_send_buffs_fcn(boost::bind(&usrp_e100_impl::io_impl::get_send_buffs, this, _1)),
         recv_pirate_booty(data_xport->get_num_recv_frames()),
@@ -79,7 +77,8 @@ struct usrp_e100_impl::io_impl{
 
     //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_xport;
+    //This comment is invalid because its now a reference and not stored here.
+    zero_copy_if::sptr &data_xport;
 
     //bound callbacks for get buffs (bound once here, not in fast-path)
     vrt_packet_handler::get_recv_buffs_t get_recv_buffs_fcn;
@@ -181,7 +180,7 @@ void usrp_e100_impl::io_init(void){
     _recv_otw_type.byteorder = otw_type_t::BO_LITTLE_ENDIAN;
 
     //setup before the registers (transport called to calculate max spp)
-    _io_impl = UHD_PIMPL_MAKE(io_impl, (_iface));
+    _io_impl = UHD_PIMPL_MAKE(io_impl, (_data_xport));
 
     //clear state machines
     _iface->poke32(UE_REG_CTRL_RX_CLEAR, 0);
@@ -234,7 +233,7 @@ size_t usrp_e100_impl::get_max_send_samps_per_packet(void) const{
         + vrt::max_if_hdr_words32*sizeof(boost::uint32_t)
         - sizeof(vrt::if_packet_info_t().cid) //no class id ever used
     ;
-    size_t bpp = _io_impl->data_xport->get_send_frame_size() - hdr_size;
+    size_t bpp = _send_frame_size - hdr_size;
     return bpp/_send_otw_type.get_sample_size();
 }
 
@@ -265,7 +264,7 @@ size_t usrp_e100_impl::get_max_recv_samps_per_packet(void) const{
         + 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 = _io_impl->data_xport->get_recv_frame_size() - hdr_size;
+    size_t bpp = _recv_frame_size - hdr_size;
     return bpp/_recv_otw_type.get_sample_size();
 }
 
diff --git a/host/lib/usrp/usrp_e100/usrp_e100_impl.cpp b/host/lib/usrp/usrp_e100/usrp_e100_impl.cpp
index a8fbe5d69..fe839c409 100644
--- a/host/lib/usrp/usrp_e100/usrp_e100_impl.cpp
+++ b/host/lib/usrp/usrp_e100/usrp_e100_impl.cpp
@@ -138,7 +138,7 @@ static device::sptr usrp_e100_make(const device_addr_t &device_addr){
         ) % USRP_E_FPGA_COMPAT_NUM % fpga_compat_num));
     }
 
-    return device::sptr(new usrp_e100_impl(iface));
+    return device::sptr(new usrp_e100_impl(iface, device_addr));
 }
 
 UHD_STATIC_BLOCK(register_usrp_e100_device){
@@ -148,7 +148,15 @@ UHD_STATIC_BLOCK(register_usrp_e100_device){
 /***********************************************************************
  * Structors
  **********************************************************************/
-usrp_e100_impl::usrp_e100_impl(usrp_e100_iface::sptr iface): _iface(iface){
+usrp_e100_impl::usrp_e100_impl(
+    usrp_e100_iface::sptr iface,
+    const device_addr_t &device_addr
+):
+    _iface(iface),
+    _data_xport(usrp_e100_make_mmap_zero_copy(_iface)),
+    _recv_frame_size(std::min(_data_xport->get_recv_frame_size(), size_t(device_addr.cast<double>("recv_frame_size", 1e9)))),
+    _send_frame_size(std::min(_data_xport->get_send_frame_size(), size_t(device_addr.cast<double>("send_frame_size", 1e9))))
+{
 
     //setup interfaces into hardware
     _clock_ctrl = usrp_e100_clock_ctrl::make(_iface);
diff --git a/host/lib/usrp/usrp_e100/usrp_e100_impl.hpp b/host/lib/usrp/usrp_e100/usrp_e100_impl.hpp
index 737aa4e8f..ab3379dd5 100644
--- a/host/lib/usrp/usrp_e100/usrp_e100_impl.hpp
+++ b/host/lib/usrp/usrp_e100/usrp_e100_impl.hpp
@@ -26,10 +26,13 @@
 #include <uhd/types/clock_config.hpp>
 #include <uhd/types/stream_cmd.hpp>
 #include <uhd/usrp/dboard_manager.hpp>
+#include <uhd/transport/zero_copy.hpp>
 
 #ifndef INCLUDED_USRP_E100_IMPL_HPP
 #define INCLUDED_USRP_E100_IMPL_HPP
 
+uhd::transport::zero_copy_if::sptr usrp_e100_make_mmap_zero_copy(usrp_e100_iface::sptr iface);
+
 static const boost::uint16_t USRP_E_FPGA_COMPAT_NUM = 0x03;
 
 //! load an fpga image from a bin file into the usrp-e fpga
@@ -79,7 +82,7 @@ private:
 class usrp_e100_impl : public uhd::device{
 public:
     //structors
-    usrp_e100_impl(usrp_e100_iface::sptr);
+    usrp_e100_impl(usrp_e100_iface::sptr, const uhd::device_addr_t &);
     ~usrp_e100_impl(void);
 
     //the io interface
@@ -94,7 +97,9 @@ private:
     usrp_e100_iface::sptr _iface;
 
     //handle io stuff
+    uhd::transport::zero_copy_if::sptr _data_xport;
     UHD_PIMPL_DECL(io_impl) _io_impl;
+    size_t _recv_frame_size, _send_frame_size;
     uhd::otw_type_t _send_otw_type, _recv_otw_type;
     void io_init(void);
     void issue_stream_cmd(const uhd::stream_cmd_t &stream_cmd);