From: Elena Agostini <eagost...@nvidia.com> GPU CUDA implementation of the new gpudev functions to expose GPU memory to the CPU.
Today GDRCopy library is required to pin and DMA map the GPU memory through the BAR1 of the GPU and expose it to the CPU. Goal here is to hide technical details GDRCopy library and expose the functionality through the generic gpudev layer. GDRCopy can be found here: https://github.com/NVIDIA/gdrcopy To build GPU CUDA driver with GDRCopy, you need to build DPDK indicating the gdrapi.h header file with -Dc_args="-I/path/to/gdrapi/". To execute you need to indicate the path to libgdrapi.so library with the environment variable GDRCOPY_PATH_L=/path/to/gdrcopy/lib/ If GDRCopy is not built with GPU CUDA driver, the GPU expose functionality will not be supported by the driver. This is an indipendent feature. All the other GPU CUDA driver capabilities are not affected if GDRCopy is not built. Signed-off-by: Elena Agostini <eagost...@nvidia.com> --- Dependency on https://patches.dpdk.org/project/dpdk/patch/20220108000457.31104-1-eagost...@nvidia.com/ Elena Agostini (1): gpu/cuda: expose GPU memory with GDRCopy drivers/gpu/cuda/cuda.c | 101 +++++++++++++++++++++++++ drivers/gpu/cuda/gdrcopy.c | 139 +++++++++++++++++++++++++++++++++++ drivers/gpu/cuda/gdrcopy.h | 29 ++++++++ drivers/gpu/cuda/meson.build | 6 +- 4 files changed, 274 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/cuda/gdrcopy.c create mode 100644 drivers/gpu/cuda/gdrcopy.h -- 2.17.1
