linux-kernel - Re: fully convert arm to use dma-direct

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Message-ID: <e3ff279d8f00fb38ee4e9ecda0e56038@kernel.org>
Date:   Sat, 23 Apr 2022 11:27:13 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Christoph Hellwig <hch@....de>
Cc:     Russell King <linux@...linux.org.uk>,
        Arnd Bergmann <arnd@...nel.org>,
        Andre Przywara <andre.przywara@....com>,
        Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Laurentiu Tudor <laurentiu.tudor@....com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Robin Murphy <robin.murphy@....com>,
        iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org
Subject: Re: fully convert arm to use dma-direct

On 2022-04-22 22:17, Linus Walleij wrote:
> On Thu, Apr 21, 2022 at 9:42 AM Christoph Hellwig <hch@....de> wrote:
> 
>> arm is the last platform not using the dma-direct code for directly
>> mapped DMA.  With the dmaboune removal from Arnd we can easily switch
>> arm to always use dma-direct now (it already does for LPAE configs
>> and nommu).  I'd love to merge this series through the dma-mapping 
>> tree
>> as it gives us the opportunity for additional core dma-mapping
>> improvements.
> (...)
> 
>>  b/arch/arm/mach-footbridge/Kconfig                   |    1
>>  b/arch/arm/mach-footbridge/common.c                  |   19
>>  b/arch/arm/mach-footbridge/include/mach/dma-direct.h |    8
>>  b/arch/arm/mach-footbridge/include/mach/memory.h     |    4
> 
> I think Marc Z has a Netwinder that he can test this on. Marc?
> I have one too, just not much in my office because of parental leave.

I'm about to travel for a week. Can this wait until I'm back?
This is one of the few boxes that isn't hooked up to the PDU,
so I can't operate it remotely.

         M.
-- 
Jazz is not dead. It just smells funny...