Summary: - I noticed that there are two kinds of descriptors for imxrt_enet.c - The first one is the legacy descriptor and its size is 8bytes. - The second one is the enhanced descriptor and its size is 32bytes. - In both cases, we can not use a descriptor chain like stm32. - Considering cache line alignment, the second one is perfect because one descriptor fits the Cortex-M7 cache line which would fix networking stability issues in d-cache write-back mode. Impact: - imxrt ethernet in d-cache write-back mode Testing: - Tested with ixmrt1060-evk:netnsh_dcache_wb (will be added later) Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com> |
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