diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/pci-epc.h | 9 | ||||
| -rw-r--r-- | include/linux/pci-epf.h | 23 |
2 files changed, 32 insertions, 0 deletions
diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h index 4286bfdbfdfa..c021c7af175f 100644 --- a/include/linux/pci-epc.h +++ b/include/linux/pci-epc.h @@ -223,6 +223,13 @@ 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()) + * @subrange_mapping: indicate if the EPC device can map inbound subranges for a + * BAR. This feature depends on @dynamic_inbound_mapping + * feature. * @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 +238,8 @@ struct pci_epc_bar_desc { */ struct pci_epc_features { unsigned int linkup_notifier : 1; + unsigned int dynamic_inbound_mapping : 1; + unsigned int subrange_mapping : 1; unsigned int msi_capable : 1; unsigned int msix_capable : 1; unsigned int intx_capable : 1; diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h index 48f68c4dcfa5..7737a7c03260 100644 --- a/include/linux/pci-epf.h +++ b/include/linux/pci-epf.h @@ -111,6 +111,22 @@ struct pci_epf_driver { #define to_pci_epf_driver(drv) container_of_const((drv), struct pci_epf_driver, driver) /** + * struct pci_epf_bar_submap - BAR subrange for inbound mapping + * @phys_addr: target physical/DMA address for this subrange + * @size: the size of the subrange to be mapped + * + * When pci_epf_bar.num_submap is >0, pci_epf_bar.submap describes the + * complete BAR layout. This allows an EPC driver to program multiple + * inbound translation windows for a single BAR when supported by the + * controller. The array order defines the BAR layout (submap[0] at offset + * 0, and each immediately follows the previous one). + */ +struct pci_epf_bar_submap { + dma_addr_t phys_addr; + size_t size; +}; + +/** * struct pci_epf_bar - represents the BAR of EPF device * @phys_addr: physical address that should be mapped to the BAR * @addr: virtual address corresponding to the @phys_addr @@ -119,6 +135,9 @@ struct pci_epf_driver { * requirement * @barno: BAR number * @flags: flags that are set for the BAR + * @num_submap: number of entries in @submap + * @submap: array of subrange descriptors allocated by the caller. See + * struct pci_epf_bar_submap for the semantics in detail. */ struct pci_epf_bar { dma_addr_t phys_addr; @@ -127,6 +146,10 @@ struct pci_epf_bar { size_t mem_size; enum pci_barno barno; int flags; + + /* Optional sub-range mapping */ + unsigned int num_submap; + struct pci_epf_bar_submap *submap; }; /** |