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Commit 8efe01b4 authored by Punit Agrawal's avatar Punit Agrawal Committed by Heiko Stuebner
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arm64: dts: rockchip: Update RK3399 PCI host bridge window to 32-bit address memory



The PCIe host bridge on RK3399 advertises a single 64-bit memory
address range even though it lies entirely below 4GB.

Previously the OF PCI range parser treated 64-bit ranges more
leniently (i.e., as 32-bit), but since commit 9d57e61b ("of/pci:
Add IORESOURCE_MEM_64 to resource flags for 64-bit memory addresses")
the code takes a stricter view and treats the ranges as advertised in
the device tree (i.e, as 64-bit).

The change in behaviour causes failure when allocating bus addresses
to devices connected behind a PCI-to-PCI bridge that require
non-prefetchable memory ranges. The allocation failure was observed
for certain Samsung NVMe drives connected to RockPro64 boards.

Update the host bridge window attributes to treat it as 32-bit address
memory. This fixes the allocation failure observed since commit
9d57e61b.

Reported-by: default avatarAlexandru Elisei <alexandru.elisei@arm.com>
Link: https://lore.kernel.org/r/7a1e2ebc-f7d8-8431-d844-41a9c36a8911@arm.com


Suggested-by: default avatarRobin Murphy <robin.murphy@arm.com>
Signed-off-by: default avatarPunit Agrawal <punitagrawal@gmail.com>
Tested-by: default avatarAlexandru Elisei <alexandru.elisei@arm.com>
Link: https://lore.kernel.org/r/20210607112856.3499682-5-punitagrawal@gmail.com


Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
parent 6efb943b
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