On Tue, Mar 04, 2014 at 10:28:51PM +0000, Arnd Bergmann wrote:
> On Tuesday 04 March 2014, Liviu Dudau wrote:
>
> > +extern int isa_dma_bridge_buggy;
>
> As commented before, I still think we can hardcode this to off
Unfortunately that doesn't work when you have CONFIG_PCI=y. drivers/pci/pci.c has:
drivers/pci/pci.c:int isa_dma_bridge_buggy;
drivers/pci/pci.c:EXPORT_SYMBOL(isa_dma_bridge_buggy);
and drivers/pci/quirks.c does:
drivers/pci/quirks.c: if (!isa_dma_bridge_buggy) {
drivers/pci/quirks.c: isa_dma_bridge_buggy=1;
drivers/pci/quirks.c- dev_info(&dev->dev, "Activating ISA DMA hang workarounds\n");
drivers/pci/quirks.c- }
>
> > +unsigned long pci_address_to_pio(phys_addr_t address)
> > +{
> > + struct ioresource *res;
> > +
> > + list_for_each_entry(res, &io_list, list) {
> > + if (address >= res->start &&
> > + address < res->start + res->size) {
> > + return res->start - address;
> > + }
> > + }
> > +
> > + return (unsigned long)-1;
> > +}
> > +EXPORT_SYMBOL_GPL(pci_address_to_pio);
>
> This has two problems:
>
> - You return the address in bus space not the logical Linux
> port number as powerpc and microblaze do.
> - You imply that the window starts at bus address zero, which
> might not be the case.
That's definitely not the intention here. I want to return the
logical port number and I want that port number to start from
zero for every registered IO range.
>
> > +EXPORT_SYMBOL(pcibios_fixup_bus);
>
> no need for this export.
OK.
>
> > +/*
> > + * We don't have to worry about legacy ISA devices, so nothing to do here
> > + */
> > +resource_size_t pcibios_align_resource(void *data, const struct resource *res,
> > + resource_size_t size, resource_size_t align)
> > +{
> > + return ALIGN(res->start, align);
> > +}
> > +EXPORT_SYMBOL(pcibios_align_resource);
>
> or this one. Also, the ALIGN() is already done by the PCI core.
This has been fix in v6 already.
Thanks for reviewing this!
Liviu
>
> Arnd
>
--
====================
| I would like to |
| fix the world, |
| but they're not |
| giving me the |
\ source code! /
---------------
¯\_(ツ)_/¯
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