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| XDMA(4) | FreeBSD Kernel Interfaces Manual | XDMA(4) |
NAME
xdma —
SYNOPSIS
To compile xDMA device support into the kernel, place the following line in your kernel configuration file:device xdmaTo compile xDMA FDT-based test driver, place the following line as well:
device xdma_test
DESCRIPTION
xDMA is a DMA framework designed to abstract the interaction between device drivers and DMA engines.xDMA defines an interface for efficient interaction between the
device driver and DMA controller. The xdma device
provides a virtual DMA controller and virtual channels called xchans. The
controller provides virtual channels management (allocation, deallocation,
configuration) and interrupt notification esteblishment needed to receive
events from the hardware DMA controller. xdma
supports the following transfer types:
Cyclic- A non-stop periodic transfer designed for applications like audio.
Memcpy- A memory-to-memory transfer.
SEE ALSO
bus_dma(9)HISTORY
Support for xDMA first appeared in FreeBSD 12.0.AUTHORS
FreeBSD xDMA framework was first added by Ruslan Bukin <br@FreeBSD.org>.| December 12, 2016 | FreeBSD 13.1-RELEASE |
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