On 10/24/2016 10:47 AM, David Miller wrote:
From: Tushar Dave <tushar.n.dave@xxxxxxxxxx>
Date: Mon, 10 Oct 2016 11:12:04 -0700
Like legacy IOMMU, use common iommu_map_table and iommu_pool for ATU.
This change initializes iommu_map_table and iommu_pool for ATU.
Signed-off-by: Tushar Dave <tushar.n.dave@xxxxxxxxxx>
Reviewed-by: chris hyser <chris.hyser@xxxxxxxxxx>
Reviewed-by: Sowmini Varadhan <sowmini.varadhan@xxxxxxxxxx>
I suspect you are adding a bisection problem here.
It looks to me like patch #2 starts setting up to use the ATU
but these changes in #3 and later are necessary for it to even
work properly.
You can't leave the tree in an intermediate non-working state
between changes like that.
I agree but even if you apply only patch #1, #2 things still work using
legacy IOMMU. (and the same is true for rest of the other patches i.e.
#3, #4, #5).
All the patches, except patch #6 , sets up needed data structures and
functions for ATU however ATU will only be used in action after you
apply patch #6 which actually enables 64bit DMA. Until then, things are
going to work using legacy IOMMU with 32bit DMA.
Thanks.
-Tushar
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