Re: [PATCH v1 1/2] PCI: ATS: Add function to check ATS page aligned request status.

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Subject: Re: [PATCH v1 1/2] PCI: ATS: Add function to check ATS page aligned request status.
From: sathyanarayanan kuppuswamy <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>
Date: Fri, 8 Feb 2019 17:02:33 -0800
Cc: linux-pci@xxxxxxxxxxxxxxx, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Ashok Raj <ashok.raj@xxxxxxxxx>, Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>, Keith Busch <keith.busch@xxxxxxxxx>
In-reply-to: <32ec3293-28ea-8f0f-f801-0370b4cf0453@kernel.org>
Organization: Intel
References: <cover.1549478584.git.sathyanarayanan.kuppuswamy@linux.intel.com> <91bfae8b1d4b424219e3ce3c1fc03559c73f1ae7.1549478584.git.sathyanarayanan.kuppuswamy@linux.intel.com> <5d55e369-355f-b710-0594-03465aa985da@kernel.org> <a5a29eee-2e33-ba0c-67a6-69983fd0796d@linux.intel.com> <32ec3293-28ea-8f0f-f801-0370b4cf0453@kernel.org>
Reply-to: sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx
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On 2/7/19 5:58 PM, Sinan Kaya wrote:


On 2/7/2019 5:16 PM, sathyanarayanan kuppuswamy wrote:

If I remember this right, aligned request is only supported on ATS v1.1
but not supported on v1.0.

Its added in v1.1.


This means that you should probably have some kind of version check
here.

There is no version field in ATS v1.0 spec. Also, If I follow thehistory log in PCI spec, I think ATS if first added at v1.2. Pleasecorrect me if I am wrong.


--
Sathyanarayanan Kuppuswamy
Linux kernel developer

Follow-Ups:
- Re: [PATCH v1 1/2] PCI: ATS: Add function to check ATS page aligned request status.
  - From: Sinan Kaya

References:
- [PATCH v1 0/2] Add page alignment check in Intel IOMMU.
  - From: sathyanarayanan . kuppuswamy
- [PATCH v1 1/2] PCI: ATS: Add function to check ATS page aligned request status.
  - From: sathyanarayanan . kuppuswamy
- Re: [PATCH v1 1/2] PCI: ATS: Add function to check ATS page aligned request status.
  - From: Sinan Kaya
- Re: [PATCH v1 1/2] PCI: ATS: Add function to check ATS page aligned request status.
  - From: sathyanarayanan kuppuswamy
- Re: [PATCH v1 1/2] PCI: ATS: Add function to check ATS page aligned request status.
  - From: Sinan Kaya

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