Re: [PATCH v4 1/7] iommu: Add IOMMU uclass
On Sat, Oct 23, 2021 at 04:58:01PM +0200, Mark Kettenis wrote: > 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 > Reviewed-by: Simon Glass Applied to u-boot/master, thanks! -- Tom signature.asc Description: PGP signature
Re: [PATCH v4 1/7] iommu: Add IOMMU uclass
On Sat, 23 Oct 2021 at 08:58, Mark Kettenis wrote: > > 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 > --- > > ChangeLog: > > v4: - Copy generic IOMMU DT bindings from Linux > - Explain IOMMU KConfig option > - Rename dev_iommu_probe() > > > doc/device-tree-bindings/iommu/iommu.txt | 206 +++ > drivers/Kconfig | 2 + > drivers/Makefile | 1 + > drivers/core/device.c| 8 + > drivers/iommu/Kconfig| 17 ++ > drivers/iommu/Makefile | 3 + > drivers/iommu/iommu-uclass.c | 45 + > include/dm/uclass-id.h | 1 + > include/iommu.h | 16 ++ > 9 files changed, 299 insertions(+) > create mode 100644 doc/device-tree-bindings/iommu/iommu.txt > create mode 100644 drivers/iommu/Kconfig > create mode 100644 drivers/iommu/Makefile > create mode 100644 drivers/iommu/iommu-uclass.c > create mode 100644 include/iommu.h Reviewed-by: Simon Glass