Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1# SPDX-License-Identifier: GPL-2.0-only
2#
3
4config AMD_AE4DMA
5 tristate "AMD AE4DMA Engine"
6 depends on (X86_64 || COMPILE_TEST) && PCI
7 depends on AMD_PTDMA
8 select DMA_ENGINE
9 select DMA_VIRTUAL_CHANNELS
10 help
11 Enable support for the AMD AE4DMA controller. This controller
12 provides DMA capabilities to perform high bandwidth memory to
13 memory and IO copy operations. It performs DMA transfer through
14 queue-based descriptor management. This DMA controller is intended
15 to be used with AMD Non-Transparent Bridge devices and not for
16 general purpose peripheral DMA.
17
18config AMD_PTDMA
19 tristate "AMD PassThru DMA Engine"
20 depends on X86_64 && PCI
21 select DMA_ENGINE
22 select DMA_VIRTUAL_CHANNELS
23 help
24 Enable support for the AMD PTDMA controller. This controller
25 provides DMA capabilities to perform high bandwidth memory to
26 memory and IO copy operations. It performs DMA transfer through
27 queue-based descriptor management. This DMA controller is intended
28 to be used with AMD Non-Transparent Bridge devices and not for
29 general purpose peripheral DMA.
30
31config AMD_QDMA
32 tristate "AMD Queue-based DMA"
33 depends on HAS_IOMEM
34 select DMA_ENGINE
35 select DMA_VIRTUAL_CHANNELS
36 select REGMAP_MMIO
37 help
38 Enable support for the AMD Queue-based DMA subsystem. The primary
39 mechanism to transfer data using the QDMA is for the QDMA engine to
40 operate on instructions (descriptors) provided by the host operating
41 system. Using the descriptors, the QDMA can move data in either the
42 Host to Card (H2C) direction or the Card to Host (C2H) direction.