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u-boot/drivers/iommu/Kconfig

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iommu: Add IOMMU uclass This uclass is intended to manage IOMMUs on systems where the IOMMUs are not in bypass mode by default. In that case U-Boot cannot ignore the IOMMUs if it wants to use devices that need to do DMA and sit behind such an IOMMU. This initial IOMMU uclass implementation does not implement and device ops and is intended for IOMMUs that have a bypass mode that does not require address translation. Support for IOMMUs that do require address translation is planned and device ops will be defined when support for such IOMMUs will be added. Signed-off-by: Mark Kettenis <kettenis@openbsd.org> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-10-23 14:58:01 +00:00
#
# IOMMU devices
#
menu "IOMMU device drivers"
config IOMMU
bool "Enable Driver Model for IOMMU drivers"
depends on DM
help
Enable driver model for IOMMU devices. An IOMMU maps device
virtiual memory addresses to physical addresses. Devices
that sit behind an IOMMU can typically only access physical
memory if the IOMMU has been programmed to allow access to
that memory.
iommu: Add Apple DART driver The DART is an IOMMU that is used on Apple's M1 SoC. This driver configures the DART such that it operates in bypass mode which is enough to support DMA for the USB3 ports integrated on the SoC. Signed-off-by: Mark Kettenis <kettenis@openbsd.org> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-10-23 14:58:05 +00:00
config APPLE_DART
bool "Apple DART support"
depends on IOMMU && ARCH_APPLE
default y
help
Enable support for the DART on Apple SoCs. The DART is Apple's
IOMMU implementation. The driver performs the necessary
configuration to put the DART into bypass mode such that it can
be used transparently by U-Boot.
iommu: Add IOMMU uclass This uclass is intended to manage IOMMUs on systems where the IOMMUs are not in bypass mode by default. In that case U-Boot cannot ignore the IOMMUs if it wants to use devices that need to do DMA and sit behind such an IOMMU. This initial IOMMU uclass implementation does not implement and device ops and is intended for IOMMUs that have a bypass mode that does not require address translation. Support for IOMMUs that do require address translation is planned and device ops will be defined when support for such IOMMUs will be added. Signed-off-by: Mark Kettenis <kettenis@openbsd.org> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-10-23 14:58:01 +00:00
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