The doorbell test requires the EPC driver to support dynamic inbound mapping so the host can map the doorbell target address into a BAR aperture.
Expose epc_features->dynamic_inbound_mapping via a new CAP_DYNAMIC_INBOUND_MAPPING bit in the pci-epf-test capability register, so the host-side pci_endpoint_test driver can detect missing support and return -EOPNOTSUPP instead of running the test fruitlessly. Suggested-by: Niklas Cassel <[email protected]> Signed-off-by: Koichiro Den <[email protected]> --- drivers/pci/endpoint/functions/pci-epf-test.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c index 0cb7af0919dc..c0db207ff143 100644 --- a/drivers/pci/endpoint/functions/pci-epf-test.c +++ b/drivers/pci/endpoint/functions/pci-epf-test.c @@ -64,6 +64,7 @@ #define CAP_MSIX BIT(2) #define CAP_INTX BIT(3) #define CAP_SUBRANGE_MAPPING BIT(4) +#define CAP_DYNAMIC_INBOUND_MAPPING BIT(5) #define PCI_EPF_TEST_BAR_SUBRANGE_NSUB 2 @@ -1102,6 +1103,9 @@ static void pci_epf_test_set_capabilities(struct pci_epf *epf) if (epf_test->epc_features->intx_capable) caps |= CAP_INTX; + if (epf_test->epc_features->dynamic_inbound_mapping) + caps |= CAP_DYNAMIC_INBOUND_MAPPING; + if (epf_test->epc_features->dynamic_inbound_mapping && epf_test->epc_features->subrange_mapping) caps |= CAP_SUBRANGE_MAPPING; -- 2.51.0
