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PCI: rockchip-ep: Set a 64-bit BAR if requested

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Ever since commit f25b5fae29 ("PCI: endpoint: Setting a BAR size > 4 GB
is invalid if 64-bit flag is not set") it has been impossible to get the
.set_bar() callback with a BAR size > 2 GB (yes, 2GB!), if the BAR was
also not requested to be configured as a 64-bit BAR.

It is however possible that an EPF driver configures a BAR as 64-bit,
even if the requested size is < 4 GB.

Respect the requested BAR configuration, just like how it is already
respected with regards to the prefetchable bit.

Link: https://lore.kernel.org/linux-pci/20240320113157.322695-8-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
This commit is contained in:
Niklas Cassel 2024-03-20 12:31:54 +01:00 committed by Krzysztof Wilczyński
parent 4cece76496
commit de66b37a17
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1 changed files with 1 additions and 1 deletions
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2
drivers/pci/controller/pcie-rockchip-ep.c
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@ -153,7 +153,7 @@ static int rockchip_pcie_ep_set_bar(struct pci_epc *epc, u8 fn, u8 vfn,
ctrl = ROCKCHIP_PCIE_CORE_BAR_CFG_CTRL_IO_32BITS;
} else {
bool is_prefetch = !!(flags & PCI_BASE_ADDRESS_MEM_PREFETCH);
bool is_64bits = sz > SZ_2G;
bool is_64bits = !!(flags & PCI_BASE_ADDRESS_MEM_TYPE_64);
if (is_64bits && (bar & 1))
return -EINVAL;