Il 08/12/21 13:07, Dafna Hirschfeld ha scritto:
From: Yong Wu <[email protected]>
Prepare for 2 HWs that sharing pgtable in different power-domains.
When there are 2 M4U HWs, it may has problem in the flush_range in which
we get the pm_status via the m4u dev, BUT that function don't reflect the
real power-domain status of the HW since there may be other HW also use
that power-domain.
DAM allocation is often done while the allocating device is runtime
suspended. In such a case the iommu will also be suspended and partial
flushing of the tlb will not be executed.
Therefore, we add a tlb_flush_all in the pm_runtime_resume to make
sure the tlb is always clean.
In other case, the iommu's power should be active via device
link with smi.
Signed-off-by: Yong Wu <[email protected]>
[move the call to mtk_iommu_tlb_flush_all to the bottom of resume cb, improve
doc/log]
Signed-off-by: Dafna Hirschfeld <[email protected]>
Reviewed-by: AngeloGioacchino Del Regno
<[email protected]>
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