On Sat, Sep 25, 2021 at 10:32:23PM +0200, Sergio Paracuellos wrote: > To make PCI IO work we need to properly virtually map IO cpu physical address > and set this virtual address as the address of the first PCI IO port which > is set using function 'set_io_port_base()'. > > Acked-by: Arnd Bergmann <arnd@xxxxxxxx> > Signed-off-by: Sergio Paracuellos <sergio.paracuellos@xxxxxxxxx> > --- > arch/mips/include/asm/pci.h | 2 ++ > arch/mips/pci/pci-generic.c | 14 ++++++++++++++ > 2 files changed, 16 insertions(+) > > diff --git a/arch/mips/include/asm/pci.h b/arch/mips/include/asm/pci.h > index 9ffc8192adae..35270984a5f0 100644 > --- a/arch/mips/include/asm/pci.h > +++ b/arch/mips/include/asm/pci.h > @@ -20,6 +20,8 @@ > #include <linux/list.h> > #include <linux/of.h> > > +#define pci_remap_iospace pci_remap_iospace > + > #ifdef CONFIG_PCI_DRIVERS_LEGACY > > /* > diff --git a/arch/mips/pci/pci-generic.c b/arch/mips/pci/pci-generic.c > index 95b00017886c..18eb8a453a86 100644 > --- a/arch/mips/pci/pci-generic.c > +++ b/arch/mips/pci/pci-generic.c > @@ -46,3 +46,17 @@ void pcibios_fixup_bus(struct pci_bus *bus) > { > pci_read_bridge_bases(bus); > } > + > +int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr) > +{ > + unsigned long vaddr; > + > + if (res->start != 0) { > + WARN_ONCE(1, "resource start address is not zero\n"); > + return -ENODEV; > + } > + > + vaddr = (unsigned long)ioremap(phys_addr, resource_size(res)); > + set_io_port_base(vaddr); > + return 0; > +} Acked-by: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx> -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ]