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Date: Thu, 18 Jan 2018 16:23:31 +0100
From: Christoph Hellwig <hch@lst.de>
To: Florian Fainelli <f.fainelli@gmail.com>
Subject: Re: [PATCH v4 4/8] PCI: brcmstb: Add dma-range mapping for inbound
 traffic
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Cc: Mark Rutland <mark.rutland@arm.com>,
 "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
 <devicetree@vger.kernel.org>, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
 Linux-MIPS <linux-mips@linux-mips.org>, linux-pci@vger.kernel.org,
 Catalin Marinas <catalin.marinas@arm.com>, Kevin Cernekee <cernekee@gmail.com>,
 Will Deacon <will.deacon@arm.com>,
 "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
 Rob Herring <robh+dt@kernel.org>, Russell King <rmk+kernel@armlinux.org.uk>,
 Jim Quinlan <jim2101024@gmail.com>, bcm-kernel-feedback-list@broadcom.com,
 Ralf Baechle <ralf@linux-mips.org>, Gregory Fong <gregory.0xf0@gmail.com>,
 Jonas Gorski <jonas.gorski@gmail.com>, Bjorn Helgaas <bhelgaas@google.com>,
 Brian Norris <computersforpeace@gmail.com>,
 Robin Murphy <robin.murphy@arm.com>, Christoph Hellwig <hch@lst.de>,
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On Thu, Jan 18, 2018 at 07:09:23AM -0800, Florian Fainelli wrote:
> >But in this case it actually is the example to follow as told
> >previously.
> >
> >NAK again for these chained dma ops that only create problems.
> 
> Care to explain what should be done instead?

Override phys_to_dma and dma_to_phys as mips and x86 do for similar
situations.

Bonous points of finding some generic way of doing it instead of
hiding it in arch code.

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