Re: [Nouveau] [PATCH v4 3/3] drm/nouveau/fb/nv50: defer DMA mapping of scratch page to init() hook

From	Alexandre Courbot <gnurou@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [Nouveau] [PATCH v4 3/3] drm/nouveau/fb/nv50: defer DMA mapping of scratch page to init() hook
Date	2016-10-03 07:50 +0200
Message-ID	<so4it-8qM-7@gated-at.bofh.it> (permalink)
References	<slDmp-3Pp-11@gated-at.bofh.it> <slDmp-3Pp-13@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Mon, Sep 26, 2016 at 9:32 PM, Ard Biesheuvel
<ard.biesheuvel@linaro.org> wrote:
> The 100c08 scratch page is mapped using dma_map_page() before the TTM
> layer has had a chance to set the DMA mask. This means we are still
> running with the default of 32 when this code executes, and this causes
> problems for platforms with no memory below 4 GB (such as AMD Seattle)
>
> So move the dma_map_page() to the .init hook, which executes after the
> DMA mask has been set.

The comments I did on gf100 also apply here. The only difference is
that you will have to create the oneinit hook which does not exist in
this file.

Thanks!

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[PATCH v4 3/3] drm/nouveau/fb/nv50: defer DMA mapping of scratch page to init() hook Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-09-26 14:40 +0200
  Re: [Nouveau] [PATCH v4 3/3] drm/nouveau/fb/nv50: defer DMA mapping  of scratch page to init() hook Alexandre Courbot <gnurou@gmail.com> - 2016-10-03 07:50 +0200

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