From: Niklas Cassel <cassel@kernel.org>
Date: Wed, 20 Mar 2024 11:31:53 +0000 (+0100)
Subject: PCI: cadence: Set a 64-bit BAR if requested
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=07db0fa80cf311be17da55e01f99d455f83a7c7b;p=linux.git
PCI: cadence: Set a 64-bit BAR if requested
Ever since commit f25b5fae29d4 ("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.
Thus, forcing setting the 64-bit flag for BARs larger than 2 GB in the
lower level driver is dead code and can be removed.
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/20240320113157.322695-7-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>
---
diff --git a/drivers/pci/controller/cadence/pcie-cadence-ep.c b/drivers/pci/controller/cadence/pcie-cadence-ep.c
index 81c50dc64da96..068082a311c49 100644
--- a/drivers/pci/controller/cadence/pcie-cadence-ep.c
+++ b/drivers/pci/controller/cadence/pcie-cadence-ep.c
@@ -99,14 +99,11 @@ static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8 fn, u8 vfn,
ctrl = CDNS_PCIE_LM_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;
- if (is_64bits && !(flags & PCI_BASE_ADDRESS_MEM_TYPE_64))
- epf_bar->flags |= PCI_BASE_ADDRESS_MEM_TYPE_64;
-
if (is_64bits && is_prefetch)
ctrl = CDNS_PCIE_LM_BAR_CFG_CTRL_PREFETCH_MEM_64BITS;
else if (is_prefetch)