From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
To: Christoph Hellwig <hch@lst.de>, iommu@lists.linux-foundation.org
Cc: Shawn Anastasio <shawn@anastas.io>,
Michael Ellerman <mpe@ellerman.id.au>,
Russell King <linux@armlinux.org.uk>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Paul Burton <paul.burton@mips.com>,
James Hogan <jhogan@kernel.org>,
linuxppc-dev@lists.ozlabs.org, linux-mips@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] MIPS: remove support for DMA_ATTR_WRITE_COMBINE
Date: Mon, 5 Aug 2019 11:06:24 +0300 [thread overview]
Message-ID: <f02604c5-dbea-e64e-cfb7-3a002b0da9a6@cogentembedded.com> (raw)
In-Reply-To: <20190805080145.5694-3-hch@lst.de>
Hello!
On 05.08.2019 11:01, Christoph Hellwig wrote:
> Mips uses the KSEG1 kernel memory segment do map dma coherent
MIPS. s/do/to/?
> allocations for n
on-coherent devices as uncachable, and does not have
Uncacheable?
> any kind of special support for DMA_ATTR_WRITE_COMBINE in the allocation
> path. Thus supporting DMA_ATTR_WRITE_COMBINE in dma_mmap_attrs will
> lead to multiple mappings with different caching attributes.
>
> Fixes: 8c172467be36 ("MIPS: Add implementation of dma_map_ops.mmap()")
> Signed-off-by: Christoph Hellwig <hch@lst.de>
[...]
MBR, Sergei
next prev parent reply other threads:[~2019-08-05 8:06 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-05 8:01 fix default dma_mmap_* pgprot v2 Christoph Hellwig
2019-08-05 8:01 ` [PATCH 1/2] dma-mapping: fix page attributes for dma_mmap_* Christoph Hellwig
2019-08-05 9:10 ` Catalin Marinas
[not found] ` <CAP_+7SzPdNCMKuuXMjHjpCzxsey2YWR_e6mTAWtNSZ6kKBvKFw@mail.gmail.com>
2019-08-06 2:55 ` Gavin Li
2019-08-06 5:12 ` Christoph Hellwig
2019-08-06 19:39 ` Shawn Anastasio
2019-08-07 6:04 ` Christoph Hellwig
2019-08-07 11:45 ` Shawn Anastasio
2019-08-05 8:01 ` [PATCH 2/2] MIPS: remove support for DMA_ATTR_WRITE_COMBINE Christoph Hellwig
2019-08-05 8:06 ` Sergei Shtylyov [this message]
2019-08-07 6:16 fix default dma_mmap_* pgprot v3 Christoph Hellwig
2019-08-07 6:16 ` [PATCH 2/2] MIPS: remove support for DMA_ATTR_WRITE_COMBINE Christoph Hellwig
2019-09-18 19:50 ` Maciej W. Rozycki
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