netdev - Re: [PATCH 5/6] net: fec: use dma_alloc

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Message-ID: <11354dc7-7f3f-802f-39f5-efbe55f8faf4@linux-m68k.org>
Date: Fri, 13 Oct 2023 11:48:20 +1000
From: Greg Ungerer <gerg@...ux-m68k.org>
To: Christoph Hellwig <hch@....de>
Cc: Michael Schmitz <schmitzmic@...il.com>,
 Robin Murphy <robin.murphy@....com>, iommu@...ts.linux.dev,
 Marek Szyprowski <m.szyprowski@...sung.com>,
 Geert Uytterhoeven <geert@...ux-m68k.org>, Wei Fang <wei.fang@....com>,
 Shenwei Wang <shenwei.wang@....com>, Clark Wang <xiaoning.wang@....com>,
 NXP Linux Team <linux-imx@....com>, linux-m68k@...ts.linux-m68k.org,
 netdev@...r.kernel.org, Jim Quinlan <james.quinlan@...adcom.com>
Subject: Re: [PATCH 5/6] net: fec: use dma_alloc_noncoherent for m532x

Hi Christoph,

On 13/10/23 00:00, Christoph Hellwig wrote:
> On Thu, Oct 12, 2023 at 11:25:00PM +1000, Greg Ungerer wrote:
>> Not sure I follow. This is the opposite of the case above. The noncoherent alloc
>> and cache flush should be performed if ColdFire and any of CONFIG_HAVE_CACHE_CB,
>> CONFIG_CACHE_D or CONFIG_CACHE_BOTH are set - since that means there is data
>> caching involved.
> 
> FYI, this is what I ended up with this morning:
> 
> http://git.infradead.org/users/hch/misc.git/commitdiff/ea7c8c5ca3f158f88594f4f1c9a52735115f9aca

That looks nice.

> Whole branch:
> 
> http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/dma-coherent-deps

I'll try and give this some testing next week.

Thanks
Greg