On Fri, Feb 07, 2025 at 04:58:59AM +0530, Krishna Chaitanya Chundru wrote: > The ELBI registers falls after the DBI space, PARF_SLV_DBI_ELBI register > gives us the offset from which ELBI starts. so use this offset and cfg > win to map these regions instead of doing the ioremap again. > + /* Set the ECAM base */ > + writel_relaxed(lower_32_bits(pci->dbi_phys_addr), pcie->parf + PARF_ECAM_BASE); > + writel_relaxed(upper_32_bits(pci->dbi_phys_addr), pcie->parf + PARF_ECAM_BASE_HI); > + > + /* > + * The only device on root bus is the Root Port. Any access other than that > + * should not go out of the link and should return all F's. Since the iATU > + * is configured for the buses which starts after root bus, block the transactions > + * starting from function 1 of the root bus to the end of the root bus (i.e from > + * dbi_base + 4kb to dbi_base + 1MB) from going outside the link. 99% of this file fits in 80 columns. Wrap comments to do the same. The text doesn't quite make sense because accesses to devices on the root bus *never* involve a link. Only Root Ports have links and the links all lead to buses other than the root bus.
