linux-kernel - Re: [PATCH 8/8] WIP: add a dma_alloc

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Message-ID: <20201007062150.GA10601@lst.de>
Date:   Wed, 7 Oct 2020 08:21:50 +0200
From:   Christoph Hellwig <hch@....de>
To:     Tomasz Figa <tfiga@...omium.org>
Cc:     Christoph Hellwig <hch@....de>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        "open list:IOMMU DRIVERS" <iommu@...ts.linux-foundation.org>,
        Robin Murphy <robin.murphy@....com>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>
Subject: Re: [PATCH 8/8] WIP: add a dma_alloc_contiguous API

On Tue, Oct 06, 2020 at 10:56:04PM +0200, Tomasz Figa wrote:
> > Yes.  And make sure the API isn't implemented when VIVT caches are
> > used, but that isn't really different from the current interface.
> 
> Okay, thanks. Let's see if we can make necessary changes to the videobuf2.
> 
> +Sergey Senozhatsky for awareness too.

I can defer the changes a bit to see if you'd really much prefer
the former interface.  I think for now the most important thing is
that it works properly for the potential users, and the prime one is
videobuf2 for now.  drm also seems like a big potential users, but I
had a really hard time getting the developers to engage in API
development.