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using PEX8311 on i.mx6

Question asked by hyunho Shin on Jan 21, 2014
Latest reply on Oct 28, 2015 by Ningbo Zhang

PEX8311 is PCIe to local bus bridge chipset

 

and pex8311 has DMA function.

 

i need to that DMA function for local bus throughput(bandwidth)

 

pex8311 have DMA of two direction(PCI to Local bus, Local bus to PCI)

 

"Local bus to PCI DMA" is work well.

 

but "PCI to local bus DMA" is stuck while dma transfer

 

stuck mean is dma transfer is never complete(no system halt)

 

do anyone know this problem?

 

P.S. i'm using linux 3.0.35

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