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.
Add vfio_pci_cmd_set()/vfio_pci_cmd_clear() macros for PCI_COMMAND operations. Patch 2: 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 3: 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 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. Changes in v11: - Split into 3 patches: added precursor patch that moves memcpy chunking into vfio_pci_driver_memcpy() and adds generic vfio_pci_cmd_set()/vfio_pci_cmd_clear() PCI command helpers - Replaced feature flag with NULL send_msi callback check - Renamed nv_falcons/ to nv_falcon/; moved struct gpu_device to .c file; renamed to_nv_gpu() to to_gpu_device() - Allow gpu_poll_register() and fsp_poll_queue() callers to propagate timeout errors - Fixed macro alignment in hw.h Changes in v10: - Replaced NULL pointer checks on send_msi() with per-device VFIO_PCI_DRIVER_F_NO_SEND_MSI feature flag - Changed vfio_pci_driver_send_msi() to return int with the feature check moved inside, so callers branch on the return value - Added fcntl_set_msi_nonblock(self) and updated ASSERT_NO_MSI(self) macros that check the flag internally - Moved DMA execution from memcpy_start() to memcpy_wait() so that memcpy_start() stores parameters and returns immediately, emulating async behavior to conform to the memcpy_start()/memcpy_wait() contract - Split GPU_ARCH_PASCAL into GPU_ARCH_PASCAL (P100, PMC reset) and GPU_ARCH_PASCAL_10X (P4/P40, engine reset) to match per-product reset behavior - Minor cleanups: improved size_to_dma_encoding(), fixed DMA address bits mask Rubin Du (3): selftests/vfio: Add memcpy chunking and PCI command helpers selftests/vfio: Allow drivers without send_msi() support selftests/vfio: Add NVIDIA Falcon driver for DMA testing .../selftests/vfio/lib/drivers/nv_falcon/hw.h | 349 ++++++++ .../vfio/lib/drivers/nv_falcon/nv_falcon.c | 755 ++++++++++++++++++ .../lib/include/libvfio/vfio_pci_device.h | 10 + tools/testing/selftests/vfio/lib/libvfio.mk | 2 + .../selftests/vfio/lib/vfio_pci_driver.c | 21 +- .../selftests/vfio/vfio_pci_driver_test.c | 59 +- 6 files changed, 1171 insertions(+), 25 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 -- 2.43.0
