> > Hi Jocke, > > > > QUICC engine supports dynamic maximum frame length. If you are not > > expecting to receive only tagged frames, I recommend to use this > > feature by setting dynamicMaxFrameLength and > dynamicMinFrameLength in > > ug_info instead of increasing the MaxLength for both tagged > and untagged frames. > > See the following part from the reference manual. > > > > The MFLR entry in the Global Parameter RAM defines the > length of the > > largest frame, excluding Q TAG but including FCS, that is > still valid. > > When REMODER[DXE]=1, a tagged frame that has length equals > > MaxLength+4 considered valid, and a non tagged frame that has length > > equals MaxLength is the longest > > that is still considered valid. When REMODER[DXE]=0, any > frame longer > > than MaxLength consider erroneous frame. > > For systems with only tagged frames, set REMODER[DXE]=0 and set > > MaxLength = Max LLC size+4. > > > > - Leo > > Interesting, that should also work although QinQ will not. I > will have a closer look but I still don't see how my orginal > patch would harm anything. One could add my patch on top but > with only 4 bytes extra.
Hi, The increase of max packet length may cause a waste of QE internal buffer for every packet. Furthermore it affects the hardware statistics of jumbo packets. - Leo _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
