On Thu, Jan 07, 2021 at 11:31:36PM +0000, Darren Salt wrote:
> I demand that Bjorn Helgaas may or may not have written...
?
> >> +static inline int pci_rebar_bytes_to_size(u64 bytes)
> >> +{
> >> + bytes = roundup_pow_of_two(bytes);
> >> + return max(ilog2(bytes), 20) - 20;
>
> > This isn't returning a "size", is it? It looks like it's returning the
> > log2 of the number of MB the BAR will be, i.e., the encoding used by the
> > Resizable BAR Control register "BAR Size" field. Needs a brief comment to
> > that effect and/or a different function name.
>
> Given that, it seems to me that pci_rebar_size_to_bytes should be similarly
> commented and/or renamed.
Makes sense. Something like this is sufficient:
return 1ULL << (size + 20); /* Convert PCI_REBAR_CTRL "BAR Size" */
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