tile PCI RC: support I/O space access
To enable this functionality, configure CONFIG_TILE_PCI_IO. Without
this flag, the kernel still assigns I/O address ranges to the
devices, but no TRIO resource and mapping support is provided.
We assign disjoint I/O address ranges to separate PCIe domains.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 24565a7..bfff769 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -396,6 +396,16 @@
config NO_IOPORT
def_bool !PCI
+config TILE_PCI_IO
+ bool "PCI I/O space support"
+ default n
+ depends on PCI
+ depends on TILEGX
+ ---help---
+ Enable PCI I/O space support on TILEGx. Since the PCI I/O space
+ is used by few modern PCIe endpoint devices, its support is disabled
+ by default to save the TRIO PIO Region resource for other purposes.
+
source "drivers/pci/Kconfig"
config TILE_USB