Commit 3cb8eefb authored Dec 11, 2018 by Benjamin Herrenschmidt Committed by Greg Kroah-Hartman Dec 05, 2019

powerpc/44x/bamboo: Fix PCI range



[ Upstream commit 3cfb9ebe906b51f2942b1e251009bb251efd2ba6 ]

The bamboo dts has a bug: it uses a non-naturally aligned range
for PCI memory space. This isnt' supported by the code, thus
causing PCI to break on this system.

This is due to the fact that while the chip memory map has 1G
reserved for PCI memory, it's only 512M aligned. The code doesn't
know how to split that into 2 different PMMs and fails, so limit
the region to 512M.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent ba87ed0a

arch/powerpc/boot/dts/bamboo.dts

+3 −1

Original line number	Diff line number	Diff line
		@@ -268,8 +268,10 @@
		/* Outbound ranges, one memory and one IO,
		* later cannot be changed. Chip supports a second
		* IO range but we don't use it for now
		* The chip also supports a larger memory range but
		* it's not naturally aligned, so our code will break
		*/
		ranges = <0x02000000 0x00000000 0xa0000000 0x00000000 0xa0000000 0x00000000 0x40000000
		ranges = <0x02000000 0x00000000 0xa0000000 0x00000000 0xa0000000 0x00000000 0x20000000
		0x02000000 0x00000000 0x00000000 0x00000000 0xe0000000 0x00000000 0x00100000
		0x01000000 0x00000000 0x00000000 0x00000000 0xe8000000 0x00000000 0x00010000>;