Hello Mani, On Fri, Nov 29, 2024 at 02:54:15PM +0530, Manivannan Sadhasivam wrote: > Migrate the PCI endpoint test to Kselftest framework. All the tests that > were part of the previous pcitest.sh file were migrated. > > Below is the exclusive list of tests: > > 1. BAR Tests (BAR0 to BAR5) > 2. Legacy IRQ Tests > 3. MSI Interrupt Tests (MSI1 to MSI32) > 4. MSI-X Interrupt Tests (MSI-X1 to MSI-X2048) > 5. Read Tests - MEMCPY (For 1, 1024, 1025, 1024000, 1024001 Bytes) > 6. Write Tests - MEMCPY (For 1, 1024, 1025, 1024000, 1024001 Bytes) > 7. Copy Tests - MEMCPY (For 1, 1024, 1025, 1024000, 1024001 Bytes) > 8. Read Tests - DMA (For 1, 1024, 1025, 1024000, 1024001 Bytes) > 9. Write Tests - DMA (For 1, 1024, 1025, 1024000, 1024001 Bytes) > 10. Copy Tests - DMA (For 1, 1024, 1025, 1024000, 1024001 Bytes) I'm not sure if it is a great idea to add test case number 10. While it will work if you use the "dummy memcpy" DMA channel which uses MMIO under the hood, if you actually enable a real DMA controller (which often sets the DMA_PRIVATE cap in the DMA controller driver (e.g. if you are using a DWC based PCIe EP controller and select CONFIG_DW_EDMA=y)), pci_epf_test_copy() will fail with: [ 93.779444] pci_epf_test pci_epf_test.0: Cannot transfer data using DMA See: https://github.com/torvalds/linux/blob/v6.12/drivers/pci/endpoint/functions/pci-epf-test.c#L363-L368 Kind regards, Niklas
