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authorSergio Paracuellos <sergio.paracuellos@gmail.com>2021-09-25 23:32:23 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-10-05 13:36:25 +0300
commit9f76779f24183c5d85a9441016d9dad042411e50 (patch)
tree73812511012f3473f78084bc17aeb147e6ce6111 /arch/mips/pci
parent7c2584faa145991558412d135d9e1d3431f47c6d (diff)
downloadlinux-9f76779f24183c5d85a9441016d9dad042411e50.tar.xz
MIPS: implement architecture-specific 'pci_remap_iospace()'
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@arndb.de> Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com> Link: https://lore.kernel.org/r/20210925203224.10419-6-sergio.paracuellos@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/mips/pci')
-rw-r--r--arch/mips/pci/pci-generic.c14
1 files changed, 14 insertions, 0 deletions
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;
+}