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

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Message-ID: <20170817132847.GA6854@ulmo>
Date:   Thu, 17 Aug 2017 15:28:47 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Joerg Roedel <joro@...tes.org>
Cc:     iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
        Joerg Roedel <jroedel@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Jonathan Hunter <jonathanh@...dia.com>,
        dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org
Subject: Re: [PATCH 10/13] drm/tegra: Use sychronized interface of the
 IOMMU-API

On Thu, Aug 17, 2017 at 02:56:33PM +0200, Joerg Roedel wrote:
> From: Joerg Roedel <jroedel@...e.de>
> 
> 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@...il.com>
> Cc: David Airlie <airlied@...ux.ie>
> Cc: Jonathan Hunter <jonathanh@...dia.com>
> Cc: dri-devel@...ts.freedesktop.org
> Cc: linux-tegra@...r.kernel.org
> Signed-off-by: Joerg Roedel <jroedel@...e.de>
> ---
>  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@...dia.com>

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