From: Alex Williamson <alex.williamson@redhat.com>
To: Ran Shalit <ranshalit@gmail.com>, linux-pci@vger.kernel.org
Subject: Re: Q: Relation between lanes to devices and to BARs
Date: Sun, 31 Jan 2016 21:14:53 -0700 [thread overview]
Message-ID: <1454300093.10542.3.camel@redhat.com> (raw)
In-Reply-To: <CAJ2oMhL-oL68ZOLsFEn3uGE=O9sMjcwPDH6oznLhG15xnzSQtQ@mail.gmail.com>
On Sun, 2016-01-31 at 02:15 -0500, Ran Shalit wrote:
> Hello,
>
> I am new to pci express drivers, and would please like to ask a question.
> We develop a linux driver for a PCIe device board with 4 lanes.
> 1. Is it expected that this will be recognized as a single device or
> multiple device ?
It depends whether your device is multifunction.
> 2. Is it that each lane rales to a different BAR or there is no
> connection between these two ?
No relation, all PCI/e devices have the same set of standard BARs
available to them.
next prev parent reply other threads:[~2016-02-01 4:14 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-31 7:15 Q: Relation between lanes to devices and to BARs Ran Shalit
2016-02-01 4:14 ` Alex Williamson [this message]
2016-02-01 18:41 ` Ran Shalit
2016-02-01 20:54 ` Bjorn Helgaas
2016-02-11 15:22 ` Ran Shalit
2016-02-12 3:20 ` Bjorn Helgaas
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