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

From: Alexandre Courbot
Date: Mon Oct 03 2016 - 01:46:35 EST

On Mon, Sep 26, 2016 at 9:32 PM, Ard Biesheuvel
<ard.biesheuvel@xxxxxxxxxx> 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.