From 29a025b6fbf36a218d1210061ff889b13e04bc33 Mon Sep 17 00:00:00 2001 From: Niklas Cassel Date: Wed, 20 Mar 2024 12:31:49 +0100 Subject: PCI: endpoint: Allocate a 64-bit BAR if that is the only option MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit pci_epf_alloc_space() already sets the 64-bit flag if the BAR size is larger than 2GB, even if the caller did not explicitly request a 64-bit BAR. Thus, let pci_epf_alloc_space() also set the 64-bit flag if the hardware description says that the specific BAR can only be 64-bit. Link: https://lore.kernel.org/linux-pci/20240320113157.322695-3-cassel@kernel.org Signed-off-by: Niklas Cassel Signed-off-by: Krzysztof Wilczyński Reviewed-by: Manivannan Sadhasivam --- drivers/pci/endpoint/pci-epf-core.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'drivers/pci/endpoint') diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c index 0a28a0b0911b..323f2a60ab16 100644 --- a/drivers/pci/endpoint/pci-epf-core.c +++ b/drivers/pci/endpoint/pci-epf-core.c @@ -255,6 +255,8 @@ EXPORT_SYMBOL_GPL(pci_epf_free_space); * @type: Identifies if the allocation is for primary EPC or secondary EPC * * Invoke to allocate memory for the PCI EPF register space. + * Flag PCI_BASE_ADDRESS_MEM_TYPE_64 will automatically get set if the BAR + * can only be a 64-bit BAR, or if the requested size is larger than 2 GB. */ void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar, const struct pci_epc_features *epc_features, @@ -304,9 +306,10 @@ void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar, epf_bar[bar].addr = space; epf_bar[bar].size = size; epf_bar[bar].barno = bar; - epf_bar[bar].flags |= upper_32_bits(size) ? - PCI_BASE_ADDRESS_MEM_TYPE_64 : - PCI_BASE_ADDRESS_MEM_TYPE_32; + if (upper_32_bits(size) || epc_features->bar[bar].only_64bit) + epf_bar[bar].flags |= PCI_BASE_ADDRESS_MEM_TYPE_64; + else + epf_bar[bar].flags |= PCI_BASE_ADDRESS_MEM_TYPE_32; return space; } -- cgit v1.2.3