imx6 enet

[dongfangxiu]

According to i.MX 6 SD Applications Processor reference  manual,

Legacy buffer descriptors are used only in single-ring mode,

that is, when DMAnCFG[DMA_CLASS_EN] are zero.

but I cannot find this register, so when descriptors reach the last one, they cannot warp back, errors happen.

[igorpadykov]

Hi dong

for DMA_CLASS_EN description please check

sect.24.5.42 DMA Class Based Configuration (ENETx_DMAnCFG) i.MX6SX Reference Manual

http://cache.freescale.com/files/32bit/doc/ref_manual/IMX6SXRM.pdf

Best regards

igor

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[dongfangxiu]

Thanks! It comes out my cache has some problem. Another problem is, when I ping my PC with 10000 bytes packets, the link will down sometimes.