On 26.09.19 15:52, Julien Grall wrote:
Hi,
Hi Julien
On 9/26/19 12:20 PM, Oleksandr Tyshchenko wrote:
From: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com>
The main puprose of this patch is to add a way to register DT device
(which is behind the IOMMU) using the generic IOMMU DT bindings [1]
before assigning that device to a domain.
So, this patch adds new "iommu_add_dt_device" API for adding DT device
to the IOMMU using generic IOMMU DT bindings and previously added
"iommu_fwspec" support. As devices can be assigned to the hardware
domain
and other domains this function is called from two places:
handle_device()
and iommu_do_dt_domctl().
Besides that, this patch adds new "dt_xlate" callback (borrowed from
Linux "of_xlate") for providing the driver with DT IOMMU specifier
which describes the IOMMU master interfaces of that device (device
IDs, etc).
According to the generic IOMMU DT bindings the context of required
properties for IOMMU device/master node (#iommu-cells, iommus) depends
on many factors and is really driver depended thing.
Please note, all IOMMU drivers which support generic IOMMU DT bindings
should use "dt_xlate" and "add_device" callbacks.
[1]
https://www.kernel.org/doc/Documentation/devicetree/bindings/iommu/iommu.txt
Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com>
Acked-by: Julien Grall <julien.gr...@arm.com>
Thank you!
--
Regards,
Oleksandr Tyshchenko
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