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Is it possible to enable PAMU with sdk versions of fman and dpaa

Question asked by ollivinho on Oct 24, 2018
Latest reply on Jun 5, 2019 by ollivinho


Is it possible to enable PAMU with the SDK versions of FMAN and DPAA drivers? I am based on Linux 4.9.124 commit e8b01fb24fb8eb1adee9667eba2cae702b5892e9.


SRC_URI = "git://;nobranch=1 \
SRCREV = "e8b01fb24fb8eb1adee9667eba2cae702b5892e9"


I am running on a custom board based on T2081. With the mainline versions of fman and dpaa I get RX/TX dropped packets on fm1-mac1 interface. Switching to sdk_fman and sdk_dpaa solves the network issue but I have to disable PAMU (and USDPAA) for it to compile.


Now I need to allocate large DMA buffers using scatter gather and I figure PAMU will help performance here.


I did also look into CMA and DMA_CMA as an alternative to scatter gather but it is not supported in powerpc arch.


Best regards,