AR# 52195: 14.3 EDK, AXI DMA: Data mismatch seen on streaming side for C_SG_LENGTH_WIDTH > 12
AR# 52195
14.3 EDK, AXI DMA: Data mismatch seen on streaming side for C_SG_LENGTH_WIDTH > 12
描述
Whenever I set C_SG_LENGTH_WIDTH > 12 for AXI DMA, I see that data is incorrect.
But for C_SG_LENGTH_WIDTH <= 12, no data mismatch is seen on the streaming side.
How do I resolve this?
解决方案
This is a known issue in AXI DMA.
Currently, AXI4 fixed-address read (or keyhole read) transactions do not transfer the correct number of bytes on streaming interfaces when the parameter C_SG_LENGTH_WIDTH is > 12.
To work around the issue, split large transfers into two or more commands so that the C_SG_LENGTH_WIDTH is not > 12.
This issue is currently planned to be fixed starting in EDK 14.4