Re: [PATCH v1] PCI: qcom: Avoid DBI and ATU register space mirror to BAR/MMIO region

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On Thu, Jun 20, 2024 at 02:34:05PM -0700, Prudhvi Yarlagadda wrote:
> PARF hardware block which is a wrapper on top of DWC PCIe controller
> mirrors the DBI and ATU register space. It uses PARF_SLV_ADDR_SPACE_SIZE
> register to get the size of the memory block to be mirrored and uses
> PARF_DBI_BASE_ADDR, PARF_ATU_BASE_ADDR registers to determine the base
> address of DBI and ATU space inside the memory block that is being
> mirrored.
> 

This PARF_SLV_ADDR_SPACE register is a mystery to me. I tried getting to the
bottom of it, but nobody could explain it to me clearly. Looks like you know
more about it...


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