diff options
| author | Koichiro Den <den@valinux.co.jp> | 2026-01-24 23:50:05 +0900 |
|---|---|---|
| committer | Manivannan Sadhasivam <mani@kernel.org> | 2026-01-28 19:15:48 +0530 |
| commit | 06a81c5940e46cc7bddee28f16bdd29a12a76344 (patch) | |
| tree | b856ef3ab201d7dbd943fba4cec0745f226ba1e4 /include | |
| parent | 0ecd890e3cf54a0586247b9a384702703277e4fd (diff) | |
PCI: endpoint: Add dynamic_inbound_mapping EPC feature
Introduce a new EPC feature bit (dynamic_inbound_mapping) that indicates
whether an Endpoint Controller can update the inbound address
translation for a BAR without requiring the EPF driver to clear/reset
the BAR first.
Endpoint Function drivers (e.g. vNTB) can use this information to decide
whether it really is safe to call pci_epc_set_bar() multiple times to
update inbound mappings for the BAR.
Suggested-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Koichiro Den <den@valinux.co.jp>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260124145012.2794108-2-den@valinux.co.jp
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/pci-epc.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h index 4286bfdbfdfa..4c8516756c56 100644 --- a/include/linux/pci-epc.h +++ b/include/linux/pci-epc.h @@ -223,6 +223,10 @@ struct pci_epc_bar_desc { /** * struct pci_epc_features - features supported by a EPC device per function * @linkup_notifier: indicate if the EPC device can notify EPF driver on link up + * @dynamic_inbound_mapping: indicate if the EPC device supports updating + * inbound mappings for an already configured BAR + * (i.e. allow calling pci_epc_set_bar() again + * without first calling pci_epc_clear_bar()) * @msi_capable: indicate if the endpoint function has MSI capability * @msix_capable: indicate if the endpoint function has MSI-X capability * @intx_capable: indicate if the endpoint can raise INTx interrupts @@ -231,6 +235,7 @@ struct pci_epc_bar_desc { */ struct pci_epc_features { unsigned int linkup_notifier : 1; + unsigned int dynamic_inbound_mapping : 1; unsigned int msi_capable : 1; unsigned int msix_capable : 1; unsigned int intx_capable : 1; |