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| author |  Nipun Gupta <nipun.gupta@amd.com>
| 2023-03-13 18:56:30 +0530 |
|---|---|---|
| committer |  Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| 2023-03-29 12:26:32 +0200 |
| commit | 2959ab247061e67485d83b6af8feb3761ec08cb9 (patch) | |
| tree | 833d78510e724d5e12d96aa72fb9ce0409a030f5 /drivers/cdx/Kconfig | |
| parent | misc: alcor_pci: remove unused alcor functions (diff) | |
| download | linux-2959ab247061e67485d83b6af8feb3761ec08cb9.tar.gz linux-2959ab247061e67485d83b6af8feb3761ec08cb9.tar.bz2 linux-2959ab247061e67485d83b6af8feb3761ec08cb9.zip | |
cdx: add the cdx bus driver
Introduce AMD CDX bus, which provides a mechanism for scanning
and probing CDX devices. These devices are memory mapped on
system bus for Application Processors(APUs).
CDX devices can be changed dynamically in the Fabric and CDX
bus interacts with CDX controller to rescan the bus and
rediscover the devices.
Signed-off-by: Nipun Gupta <nipun.gupta@amd.com>
Reviewed-by: Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@amd.com>
Tested-by: Nikhil Agarwal <nikhil.agarwal@amd.com>
Link: https://lore.kernel.org/r/20230313132636.31850-2-nipun.gupta@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/cdx/Kconfig')
| -rw-r--r-- | drivers/cdx/Kconfig | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/cdx/Kconfig b/drivers/cdx/Kconfig new file mode 100644 index 000000000000..1aaee0ec5bd9 --- /dev/null +++ b/drivers/cdx/Kconfig @@ -0,0 +1,17 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# CDX bus configuration +# +# Copyright (C) 2022-2023, Advanced Micro Devices, Inc. +# + +config CDX_BUS + bool "CDX Bus driver" + depends on OF && ARM64 + help + Driver to enable Composable DMA Transfer(CDX) Bus. CDX bus + exposes Fabric devices which uses composable DMA IP to the + APU. CDX bus provides a mechanism for scanning and probing + of CDX devices. CDX devices are memory mapped on system bus + for embedded CPUs. CDX bus uses CDX controller and firmware + to scan these CDX devices. |