Kernel driver sources

• linux-xdma/: the Xilinx XDMA reference driver from Xilinx/dma_ip_drivers, XDMA/linux-kernel/xdma at upstream commit 14c9f045bad9 (2024-04-04, driver version v2020.2.2 in its version.h), with COPYING, LICENSE and include/libxdma_api.h from the same tree. Sixteen of the twenty-one files are byte-identical to that commit; the other five (cdev_ctrl.c, cdev_sgdma.c, libxdma.h, xdma_cdev.c, xdma_mod.c) carry the changes in linux-xdma-dau.patch: kernel-version guards for the 6.3 vm_flags_set, the 6.4 class_create signature and the 6.5 removal of the vector-I/O helpers (read_iter/write_iter return -EOPNOTSUPP there; the DAU transfer path uses the scalar calls), a flexible array member, and trailing whitespace. The provenance was established by matching every file’s blob hash against upstream history: the import lies between that commit and the next upstream change to the directory (2025-03-04). Build it on the hardware host with make and load it with insmod ./xdma.ko. The module is built on the host it runs on, never copied between hosts.

• macos-xdma/: the macOS DriverKit system extension and its activator, written for this project.

Access

Both drivers expose the card’s memory and registers to whoever can open the device: the /dev/xdma* character devices on Linux, the IOKit user client on macOS. Neither driver checks what a transfer does to the card. The operating system’s device permissions (a udev rule on Linux) are the access control, so grant the device nodes to the user who runs the host software and to nobody else.

Licensing

linux-xdma/ is Xilinx’s code and keeps Xilinx’s terms: the source files are GPL-2.0 and the module declares Dual BSD/GPL. The upstream LICENSE (BSD) and COPYING (GPL-2.0) files are included alongside the sources, exactly as they ship in Xilinx/dma_ip_drivers. The Apache-2.0 licence at the root of this repository does not apply to that directory.

Everything else in this repository, including macos-xdma/, is Apache-2.0.