Patch 1: Add a chunking loop to vfio_pci_driver_memcpy() so that it handles arbitrarily sized memcpy requests by breaking them into max_memcpy_size-sized chunks. This allows tests to request any memcpy size. Update the test to use a size of 4x max_memcpy_size to exercise the chunking logic.
Patch 2: Add vfio_pci_cmd_set()/vfio_pci_cmd_clear() macros for PCI_COMMAND operations. Patch 3: Allow drivers that cannot trigger MSI interrupts to leave the send_msi callback NULL. Tests check ops->send_msi directly and gracefully skip MSI-related operations when it is absent. Patch 4: Introduce the nv_falcon plugin driver, which extracts and adapts relevant functionality from NVIDIA's gpu-admin-tools project [1] and integrates it into the VFIO selftest framework. As a result, any system equipped with a PCIe slot and a supported NVIDIA GPU can now run VFIO DMA selftests using commonly available hardware. Falcons are general-purpose microcontrollers present on NVIDIA GPUs that can perform DMA operations between system memory and device memory. [1] https://github.com/NVIDIA/gpu-admin-tools Changes for v14: - Re-tested with vfio_pci_driver_test on K2200, M60, P100, P4000, V100, T4, RTX 3090, RTX 4000 Ada and H100. - Alex prepared this respin addressing David's review of v13. - Patch 1 & 3: No change. - Patch 2: R-b collected. - Patch 4: address David's review - - Include <linux/types.h> - Factor out get_elapsed_ms() - Rename NV_*_BOOT_COMPLETE_MASK to _SUCCESS - Drop the redundant falcon_enable() and move the no_outside_reset check to the top of falcon_enable() so falcon_reset() is unconditional - Fold dev_err() and size_to_dma_encoding() into nv_falcon_dma() - Drop gpu->memcpy_count and the redundant GPU_ARCH_UNKNOWN assert - Alignment fixes Note on version numbering: v1 through v9 were internal review iterations that were mistakenly carried over to the upstream submission. Apologies for the confusion, the internal changelog has been dropped. Rubin Du (4): vfio: selftests: Add memcpy chunking to vfio_pci_driver_memcpy() vfio: selftests: Add generic PCI command register helpers vfio: selftests: Allow drivers without send_msi() support vfio: selftests: Add NVIDIA Falcon driver for DMA testing .../selftests/vfio/lib/drivers/nv_falcon/hw.h | 352 ++++++++ .../vfio/lib/drivers/nv_falcon/nv_falcon.c | 783 ++++++++++++++++++ .../lib/include/libvfio/vfio_pci_device.h | 14 + tools/testing/selftests/vfio/lib/libvfio.mk | 2 + .../selftests/vfio/lib/vfio_pci_driver.c | 21 +- .../selftests/vfio/vfio_pci_driver_test.c | 57 +- 6 files changed, 1206 insertions(+), 23 deletions(-) create mode 100644 tools/testing/selftests/vfio/lib/drivers/nv_falcon/hw.h create mode 100644 tools/testing/selftests/vfio/lib/drivers/nv_falcon/nv_falcon.c base-commit: d0c3bcd5b8976159d835a897254048e078f447e6 -- 2.43.0
