Re: [PATCH 10/13] drm/tegra: Use sychronized interface of the IOMMU-API

From: Thierry Reding
Date: Thu Aug 17 2017 - 09:28:57 EST


On Thu, Aug 17, 2017 at 02:56:33PM +0200, Joerg Roedel wrote:
> From: Joerg Roedel <jroedel@xxxxxxx>
>
> The map and unmap functions of the IOMMU-API changed their
> semantics: They do no longer guarantee that the hardware
> TLBs are synchronized with the page-table updates they made.
>
> To make conversion easier, new synchronized functions have
> been introduced which give these guarantees again until the
> code is converted to use the new TLB-flush interface of the
> IOMMU-API, which allows certain optimizations.
>
> But for now, just convert this code to use the synchronized
> functions so that it will behave as before.
>
> Cc: Thierry Reding <thierry.reding@xxxxxxxxx>
> Cc: David Airlie <airlied@xxxxxxxx>
> Cc: Jonathan Hunter <jonathanh@xxxxxxxxxx>
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Cc: linux-tegra@xxxxxxxxxxxxxxx
> Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
> ---
> drivers/gpu/drm/tegra/drm.c | 6 +++---
> drivers/gpu/drm/tegra/gem.c | 6 +++---
> 2 files changed, 6 insertions(+), 6 deletions(-)

Acked-by: Thierry Reding <treding@xxxxxxxxxx>

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