From 9266514689fe6476423209ee40168db53134101d Mon Sep 17 00:00:00 2001 From: Niklas Cassel Date: Fri, 16 Feb 2024 14:45:15 +0100 Subject: PCI: endpoint: Drop only_64bit on reserved BARs The definition of a reserved BAR is that EPF drivers should not touch them. The definition of only_64bit is that the EPF driver must configure this BAR as 64-bit. (An EPF driver is not allowed to choose if this BAR should be configured as 32-bit or 64-bit.) Thus, it does not make sense to put only_64bit of a BAR that EPF drivers are not allow to touch. Drop the only_64bit property from hardware descriptions that are of type reserved BAR. Signed-off-by: Niklas Cassel Reviewed-by: Kishon Vijay Abraham I Reviewed-by: Manivannan Sadhasivam Link: https://lore.kernel.org/r/20240216134524.1142149-3-cassel@kernel.org Signed-off-by: Manivannan Sadhasivam --- drivers/pci/controller/dwc/pci-keystone.c | 2 +- drivers/pci/controller/dwc/pcie-uniphier-ep.c | 2 +- drivers/pci/endpoint/pci-epc-core.c | 7 ------- include/linux/pci-epc.h | 5 +++++ 4 files changed, 7 insertions(+), 9 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c index b2b93b4fa82d..844de4418724 100644 --- a/drivers/pci/controller/dwc/pci-keystone.c +++ b/drivers/pci/controller/dwc/pci-keystone.c @@ -924,7 +924,7 @@ static const struct pci_epc_features ks_pcie_am654_epc_features = { .linkup_notifier = false, .msi_capable = true, .msix_capable = true, - .bar[BAR_0] = { .type = BAR_RESERVED, .only_64bit = true, }, + .bar[BAR_0] = { .type = BAR_RESERVED, }, .bar[BAR_1] = { .type = BAR_RESERVED, }, .bar[BAR_2] = { .type = BAR_FIXED, .fixed_size = SZ_1M, }, .bar[BAR_3] = { .type = BAR_FIXED, .fixed_size = SZ_64K, }, diff --git a/drivers/pci/controller/dwc/pcie-uniphier-ep.c b/drivers/pci/controller/dwc/pcie-uniphier-ep.c index 265f65fc673f..639bc2e12476 100644 --- a/drivers/pci/controller/dwc/pcie-uniphier-ep.c +++ b/drivers/pci/controller/dwc/pcie-uniphier-ep.c @@ -415,7 +415,7 @@ static const struct uniphier_pcie_ep_soc_data uniphier_pro5_data = { .bar[BAR_1] = { .type = BAR_RESERVED, }, .bar[BAR_2] = { .only_64bit = true, }, .bar[BAR_3] = { .type = BAR_RESERVED, }, - .bar[BAR_4] = { .type = BAR_RESERVED, .only_64bit = true, }, + .bar[BAR_4] = { .type = BAR_RESERVED, }, .bar[BAR_5] = { .type = BAR_RESERVED, }, }, }; diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c index 7fe8f4336765..da3fc0795b0b 100644 --- a/drivers/pci/endpoint/pci-epc-core.c +++ b/drivers/pci/endpoint/pci-epc-core.c @@ -120,13 +120,6 @@ enum pci_barno pci_epc_get_next_free_bar(const struct pci_epc_features /* If the BAR is not reserved, return it. */ if (epc_features->bar[i].type != BAR_RESERVED) return i; - - /* - * If the BAR is reserved, and marked as 64-bit only, then the - * succeeding BAR is also reserved. - */ - if (epc_features->bar[i].only_64bit) - i++; } return NO_BAR; diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h index 4ccb4f4f3883..cc2f70d061c8 100644 --- a/include/linux/pci-epc.h +++ b/include/linux/pci-epc.h @@ -164,6 +164,11 @@ enum pci_epc_bar_type { * should be configured as 32-bit or 64-bit, the EPF driver must * configure this BAR as 64-bit. Additionally, the BAR succeeding * this BAR must be set to type BAR_RESERVED. + * + * only_64bit should not be set on a BAR of type BAR_RESERVED. + * (If BARx is a 64-bit BAR that an EPF driver is not allowed to + * touch, then both BARx and BARx+1 must be set to type + * BAR_RESERVED.) */ struct pci_epc_bar_desc { enum pci_epc_bar_type type; -- cgit v1.2.3