From mboxrd@z Thu Jan  1 00:00:00 1970
From: sathyanarayanan kuppuswamy
        <sathyanarayanan.kuppuswamy@linux.intel.com>
Subject: Re: [PATCH v1 1/2] PCI: ATS: Add function to check ATS page aligned
 request status.
Date: Fri, 8 Feb 2019 17:02:33 -0800
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To: Sinan Kaya <okaya@kernel.org>, bhelgaas@google.com, joro@8bytes.org, dwmw2@infradead.org
Cc: linux-pci@vger.kernel.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Ashok Raj <ashok.raj@intel.com>, Jacob Pan <jacob.jun.pan@linux.intel.com>, Keith Busch <keith.busch@intel.com>
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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 the 
history log in PCI spec, I think ATS if first added at v1.2. Please 
correct me if I am wrong.

-- 
Sathyanarayanan Kuppuswamy
Linux kernel developer