linux-kernel - Re: [PATCH 1/2] arm64: dma_mapping: allow PCI host driver to limit DMA mask

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Date:   Fri, 30 Dec 2016 13:06:58 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     Nikita Yushchenko <nikita.yoush@...entembedded.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Arnd Bergmann <arnd@...db.de>,
        linux-arm-kernel@...ts.infradead.org,
        Simon Horman <horms@...ge.net.au>,
        Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org
Cc:     artemi.ivanov@...entembedded.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] arm64: dma_mapping: allow PCI host driver to limit
 DMA mask

On 12/30/2016 12:46 PM, Sergei Shtylyov wrote:

>> It is possible that PCI device supports 64-bit DMA addressing, and thus
>> it's driver sets device's dma_mask to DMA_BIT_MASK(64), however PCI host
>
>    Its.
>
>> bridge has limitations on inbound transactions addressing. Example of
>> such setup is NVME
>
>    Isn't it called NVMe?
>
>> SSD device connected to RCAR PCIe controller.
>
>    R=Car.

    Sorry, R-Car. :-)

[...]

MBR, Sergei