From: Sven Peter via iommu <iommu@lists.linux-foundation.org>
To: "Mark Kettenis" <mark.kettenis@xs4all.nl>,
"Arnd Bergmann" <arnd@kernel.org>
Cc: Rob Herring <robh@kernel.org>,
devicetree@vger.kernel.org, Robin Murphy <robin.murphy@arm.com>,
Hector Martin <marcan@marcan.st>,
linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
Marc Zyngier <maz@kernel.org>,
mohamed.mediouni@caramail.com, Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org, stan@corellium.com
Subject: Re: [PATCH 0/3] Apple M1 DART IOMMU driver
Date: Fri, 26 Mar 2021 17:10:29 +0100 [thread overview]
Message-ID: <9f06872d-f0ec-43c3-9b53-d144337100b3@www.fastmail.com> (raw)
In-Reply-To: <c1bcd90d344c2b68@bloch.sibelius.xs4all.nl>
On Fri, Mar 26, 2021, at 16:59, Mark Kettenis wrote:
> Some of the DARTs provide a bypass facility. That code make using the
> standard "dma-ranges" property tricky. That property would need to
> contain the bypass address range. But that would mean that if the
> DART driver needs to look at that property to figure out the address
> range that supports translation it will need to be able to distinguish
> between the translatable address range and the bypass address range.
Do we understand if and why we even need to bypass certain streams?
And do you have an example for a node in the ADT that contains this bypass range?
I've only seen nodes with "bypass" and "bypass-adress" but that could just be
some software abstraction Apple uses which doesn't map well to Linux or other OSes
and might not even be required here.
Sven
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next prev parent reply other threads:[~2021-03-26 16:11 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-20 15:19 [PATCH 0/3] Apple M1 DART IOMMU driver Sven Peter via iommu
2021-03-20 15:19 ` [PATCH 1/3] iommu: io-pgtable: add DART pagetable format Sven Peter via iommu
2021-03-24 16:37 ` Robin Murphy
2021-03-25 20:47 ` Sven Peter via iommu
2021-03-20 15:20 ` [PATCH 2/3] dt-bindings: iommu: add DART iommu bindings Sven Peter via iommu
2021-03-22 0:15 ` Rob Herring
2021-03-22 18:16 ` Sven Peter via iommu
2021-03-21 16:00 ` [PATCH 0/3] Apple M1 DART IOMMU driver Mark Kettenis
2021-03-21 17:22 ` Sven Peter via iommu
2021-03-21 18:35 ` Mark Kettenis
2021-03-22 22:17 ` Sven Peter via iommu
2021-03-23 20:00 ` Mark Kettenis
2021-03-23 21:03 ` Sven Peter via iommu
2021-03-21 17:28 ` Sven Peter via iommu
2021-03-23 20:53 ` Rob Herring
2021-03-23 22:33 ` Mark Kettenis
2021-03-25 7:53 ` Sven Peter via iommu
2021-03-25 11:50 ` Robin Murphy
2021-03-25 20:49 ` Sven Peter via iommu
2021-03-27 15:33 ` Sven Peter via iommu
2021-03-25 21:41 ` Arnd Bergmann
2021-03-26 15:59 ` Mark Kettenis
2021-03-26 16:09 ` Arnd Bergmann
2021-03-26 16:10 ` Sven Peter via iommu [this message]
2021-03-26 16:38 ` Arnd Bergmann
2021-03-26 17:06 ` Sven Peter via iommu
2021-03-26 17:26 ` Mark Kettenis
2021-03-26 17:34 ` Robin Murphy
2021-03-26 17:51 ` Sven Peter via iommu
2021-03-26 19:59 ` Arnd Bergmann
2021-03-26 21:16 ` Mark Kettenis
2021-03-27 15:30 ` Sven Peter via iommu
2021-03-26 20:03 ` Arnd Bergmann
2021-03-26 21:13 ` Mark Kettenis
2021-03-24 15:29 ` Robin Murphy
2021-03-25 7:58 ` Sven Peter via iommu
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