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JET60200's avatar
JET60200
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4 years ago

How to stop or cancel an “Read/Write AVMM DMA operation” after it begins ?

Hi Intel experts, Sometimes I saw Arria10 " PCIe AVMM DMA operation” would consume much more time than it's expected. Such as in normal case, the DMA operation will consume around “+35us” to co...
SengKok_L_Intel's avatar
SengKok_L_Intel
Icon for Regular Contributor rankRegular Contributor
4 years ago

Hi,


One possible solution is to generate the Secondary Bus Reset from the host. It is available at the Bridge Control register Bit 6.


Regards -SK


JET60200's avatar
JET60200
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4 years ago

" One possible solution is to generate the Secondary Bus Reset from the host. It is available at the Bridge Control register Bit 6. "

-> Hello @SengKok_L_Intel ,

Sorry for the delay , but which document describes the mentioned " Bridge Control Register " ?

Pls help to point it out, so i could check it detailedly. thanks

  • SengKok_L_Intel's avatar
    SengKok_L_Intel
    Icon for Regular Contributor rankRegular Contributor
    4 years ago

    You can search the "secondary bus reset" or "bridge control register" from the PCIe spec.

    • JET60200's avatar
      JET60200
      Icon for Contributor rankContributor
      4 years ago

      Thanks @SengKok_L_Intel for quick feedback,

      I have no more questions on this ticket, thanks for kindly support！