From: "Yong, Jonathan" <jonathan.yong@intel.com>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: linux-pci@vger.kernel.org, bhelgaas@google.com
Subject: Re: [PATCH v5] PCI: PTM preliminary implementation
Date: Tue, 14 Jun 2016 09:32:28 +0800 [thread overview]
Message-ID: <575F5EAC.2030904@intel.com> (raw)
In-Reply-To: <20160613185648.GA6901@localhost>
On 06/14/2016 02:56, Bjorn Helgaas wrote:
> I'm also a little confused about how Root Complex Integrated Endpoints
> are supposed to use PTM, since they don't have an upstream bridge.
> Maybe it has to do with an RCRB (Root Complex Register Block, spec
> r3.1, sec 7.2.3)? I don't think Linux really has any support for that
> (yet).
The spec (7.32.3 PTM Control Register) says:
For Root Complex Integrated Endpoints, system software must set this
field to the value reported in the Local Clock Granularity field by the
associated PTM Time Source.
I'm not familiar with RC integrated endpoints either. I'm guessing
whatever device 0, function 0 on the "bus"? Just copy the granularity
value over?
next prev parent reply other threads:[~2016-06-14 1:32 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-11 8:47 [PATCH v5] PCI: PTM Driver Yong, Jonathan
2016-05-11 8:47 ` [PATCH v5] PCI: PTM preliminary implementation Yong, Jonathan
2016-06-12 22:18 ` Bjorn Helgaas
2016-06-13 2:59 ` Yong, Jonathan
2016-06-13 13:45 ` Bjorn Helgaas
2016-06-13 18:56 ` Bjorn Helgaas
2016-06-14 1:32 ` Yong, Jonathan [this message]
2016-06-18 18:15 ` Bjorn Helgaas
2016-05-24 3:59 ` [PATCH v5] PCI: PTM Driver Yong, Jonathan
2016-05-31 0:17 ` Yong, Jonathan
2016-06-09 6:32 ` Yong, Jonathan
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