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From: Joerg Roedel <joro@8bytes.org>
To: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org,
	linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	iommu@lists.linux-foundation.org, bhelgaas@google.com,
	robh+dt@kernel.org, mark.rutland@arm.com,
	lorenzo.pieralisi@arm.com, hanjun.guo@linaro.org,
	sudeep.holla@arm.com, rjw@rjwysocki.net, lenb@kernel.org,
	will.deacon@arm.com, robin.murphy@arm.com, okaya@codeaurora.org,
	sunil.kovvuri@gmail.com, thunder.leizhen@huawei.com,
	tn@semihalf.com
Subject: Re: [PATCH 2/7] dt-bindings: PCI: Describe ATS property for root complex nodes
Date: Tue, 30 May 2017 12:01:53 +0200	[thread overview]
Message-ID: <20170530100153.GI2818@8bytes.org> (raw)
In-Reply-To: <20170524180143.19855-3-jean-philippe.brucker@arm.com>

On Wed, May 24, 2017 at 07:01:38PM +0100, Jean-Philippe Brucker wrote:
> +- ats-supported: if present, the root complex supports the Address
> +  Translation Service (ATS). It is able to interpret the AT field in PCIe
> +  Transaction Layer Packets, and forward Translation Completions or
> +  Invalidation Requests to endpoints.
> +
> +  Device drivers should not enable ATS in endpoints unless this property
> +  is present.

Device drivers should never enable ATS, this is the job of the IOMMU
driver. This should be clarified in the text.

  reply	other threads:[~2017-05-30 10:01 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-05-24 18:01 [PATCH 0/7] Add PCI ATS support to SMMUv3 Jean-Philippe Brucker
2017-05-24 18:01 ` [PATCH 1/7] PCI: Move ATS declarations outside of CONFIG_PCI Jean-Philippe Brucker
2017-05-24 18:01 ` [PATCH 3/7] iommu/of: Check ATS capability in root complex nodes Jean-Philippe Brucker
     [not found] ` <20170524180143.19855-1-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2017-05-24 18:01   ` [PATCH 2/7] dt-bindings: PCI: Describe ATS property for " Jean-Philippe Brucker
2017-05-30 10:01     ` Joerg Roedel [this message]
2017-05-30 10:58       ` Jean-Philippe Brucker
     [not found]         ` <035be7ba-e850-a5a9-08fa-802a04feb600-5wv7dgnIgG8@public.gmane.org>
2017-05-31 17:17           ` Rob Herring
     [not found]     ` <20170524180143.19855-3-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2017-05-31 17:23       ` Rob Herring
2017-06-01 12:28         ` Jean-Philippe Brucker
2017-06-05 17:20           ` Rob Herring
2017-06-06 11:11             ` Jean-Philippe Brucker
     [not found]               ` <65aea93f-d516-f045-f216-3f56e96bdeb6-5wv7dgnIgG8@public.gmane.org>
2017-06-20 11:38                 ` Jean-Philippe Brucker
2017-05-24 18:01   ` [PATCH 4/7] ACPI/IORT: Check ATS capability in " Jean-Philippe Brucker
2017-05-24 18:01   ` [PATCH 5/7] iommu/arm-smmu-v3: Link domains and devices Jean-Philippe Brucker
2017-05-24 18:01   ` [PATCH 6/7] iommu/arm-smmu-v3: Add support for PCI ATS Jean-Philippe Brucker
     [not found]     ` <20170524180143.19855-7-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2017-05-30 10:28       ` Joerg Roedel
2017-05-30 10:58         ` Jean-Philippe Brucker
2017-05-24 18:01   ` [PATCH 7/7] iommu/arm-smmu-v3: Disable tagged pointers Jean-Philippe Brucker
2017-05-31 15:27   ` [PATCH 0/7] Add PCI ATS support to SMMUv3 Nate Watterson
2017-06-01 12:23     ` Jean-Philippe Brucker

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