Merge branch 'vodak-known-limitations' into 'devel'

docs: introduce known_limitations

See merge request ndk/ndk-fpga!247

Author: jakubcabal

core/doc/known_limitations.rst

@@ -0,0 +1,11 @@
+.. _known_limitations:
+
+Known Limitations
+=================
+
+Maximal jumbo frames
+********************
+
+For DMA Medusa maximal supported frame length (MTU) is 16332 bytes. DMA Calypte supports only frames that have up to 4096 bytes.
+For proper MTU functionality for DMA transfers, it may be necessary to set the correct SW buffer sizes, this can be done using the nfb-dma tool.
+Don't forget to also properly set the MTU in the Ethernet MAC using the nfb-eth tool, the default value here is 1526 bytes.

doc/source/index.rst

@@ -20,6 +20,7 @@ Overview
     ndk_build/readme
     ndk_core/doc/devtree
     ndk_core/doc/faq
+    ndk_core/doc/known_limitations
 
 The **Network Development Kit (NDK) for FPGAs** is a comprehensive framework designed
 for the rapid and efficient development of FPGA-accelerated network applications. Optimized