Hello all, The pci-epf-test driver recently moved to the pci_epc_mem_map() API. This API call handle unaligned addresses seamlessly, if the EPC driver being used has implemented the .align_addr callback. This means that pci-epf-test no longer need any special padding to the buffers that is allocated on the host side. (This was only done in order to satisfy the EPC's alignment requirements.) In fact, to test that the pci_epc_mem_map() API is working as intended, it is important that the host side does not only provide buffers that are nicely aligned. However, since not all EPC drivers have implemented the .align_addr callback, add support for capabilities in pci-epf-test, and if the EPC driver implements the .align_addr callback, set a new CAP_UNALIGNED_ACCESS capability. If CAP_UNALIGNED_ACCESS is set, do not allocate overly sized buffers on the host side. For EPC drivers that have not implemented the .align_addr callback, this series will not introduce any functional changes. Kind regards, Niklas Changes since v1: -Improved commit message (thank you Frank) -Renamed CAP_HAS_ALIGN_ADDR to CAP_UNALIGNED_ACCESS (thank you Damien) Niklas Cassel (2): PCI: endpoint: pci-epf-test: Add support for capabilities misc: pci_endpoint_test: Add support for capabilities drivers/misc/pci_endpoint_test.c | 21 +++++++++++++++++++ drivers/pci/endpoint/functions/pci-epf-test.c | 19 +++++++++++++++++ 2 files changed, 40 insertions(+) -- 2.47.0
