From: thomas.petazzoni@free-electrons.com (Thomas Petazzoni)
To: linux-arm-kernel@lists.infradead.org
Subject: Intel I350 mini-PCIe card (igb) on Mirabox (mvebu / Armada 370)
Date: Tue, 25 Mar 2014 22:23:25 +0100 [thread overview]
Message-ID: <20140325222325.253f4bd0@skate> (raw)
In-Reply-To: <20140325211240.GB14718@obsidianresearch.com>
Dear Jason Gunthorpe,
On Tue, 25 Mar 2014 15:12:40 -0600, Jason Gunthorpe wrote:
> On Tue, Mar 25, 2014 at 09:36:38PM +0100, Thomas Petazzoni wrote:
>
> > We have recently identified a weird thing on Armada 38x, maybe previous
> > revisions are affected as well. We haven't fully understood the problem
> > yet, but the following patch allows PCIe devices to be detected in all
> > situations on Armada 38x. It seems like setting the local device number
> > requires "some time" to be taken into account.
>
> What was the value of mvebu_pcie_link_up around this point?
>
> PHY training would be the most likely time sensitive thing to muck up
> discovery..
The link is up, but the PCIe device is not visible under the right
bus/device number until we call mvebu_pcie_set_local_dev_nr(), and wait
about 50-100 microseconds. By "not visible", I mean reading the
vendor/product ID from the PCI configuration space returns
0xffff:0xffff, while after waiting 50-100 us, the right value is read.
Thomas
--
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
next prev parent reply other threads:[~2014-03-25 21:23 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-25 20:07 Intel I350 mini-PCIe card (igb) on Mirabox (mvebu / Armada 370) Neil Greatorex
2014-03-25 20:20 ` Thomas Petazzoni
2014-03-25 21:03 ` Willy Tarreau
2014-03-25 20:22 ` Jason Gunthorpe
2014-03-25 20:36 ` Thomas Petazzoni
2014-03-25 21:12 ` Jason Gunthorpe
2014-03-25 21:23 ` Thomas Petazzoni [this message]
2014-03-25 22:03 ` Neil Greatorex
2014-03-25 22:24 ` Jason Gunthorpe
2014-03-25 22:35 ` Jason Gunthorpe
2014-03-26 19:31 ` Neil Greatorex
2014-03-26 20:12 ` Jason Gunthorpe
2014-03-26 20:34 ` Neil Greatorex
2014-03-26 21:42 ` Jason Gunthorpe
2014-03-26 21:52 ` Thomas Petazzoni
2014-03-27 0:29 ` Neil Greatorex
2014-03-27 4:40 ` Jason Gunthorpe
2014-03-28 1:03 ` Neil Greatorex
2014-03-28 2:04 ` Jason Gunthorpe
2014-04-04 13:19 ` Neil Greatorex
2014-04-05 17:32 ` Willy Tarreau
2014-04-05 17:34 ` Thomas Petazzoni
2014-04-05 18:04 ` Willy Tarreau
2014-04-05 18:55 ` Neil Greatorex
2014-04-05 19:03 ` Willy Tarreau
2014-04-05 19:00 ` Neil Greatorex
2014-04-06 15:34 ` Neil Greatorex
2014-04-06 17:43 ` Willy Tarreau
2014-04-08 15:13 ` Thomas Petazzoni
2014-04-08 15:40 ` Thomas Petazzoni
2014-04-08 15:55 ` Thomas Petazzoni
2014-04-08 16:02 ` Matthew Minter
2014-04-08 17:14 ` Jason Gunthorpe
2014-04-08 17:53 ` Willy Tarreau
2014-04-08 18:08 ` Jason Gunthorpe
2014-04-08 18:15 ` Thomas Petazzoni
2014-04-08 18:40 ` Jason Gunthorpe
2014-04-08 19:15 ` Willy Tarreau
2014-04-08 19:21 ` Jason Gunthorpe
2014-04-08 20:17 ` Matthew Minter
2014-04-08 21:50 ` Thomas Petazzoni
2014-04-08 20:19 ` Neil Greatorex
2014-04-08 20:43 ` Willy Tarreau
2014-04-08 18:01 ` Thomas Petazzoni
2014-04-08 18:22 ` Jason Gunthorpe
2014-04-08 18:32 ` Thomas Petazzoni
2014-04-08 15:53 ` Willy Tarreau
2014-04-08 16:00 ` Thomas Petazzoni
2014-04-08 16:05 ` Willy Tarreau
2014-04-06 18:58 ` Willy Tarreau
2014-04-06 19:11 ` Thomas Petazzoni
2014-04-06 21:57 ` Neil Greatorex
2014-04-06 22:04 ` Willy Tarreau
2014-04-06 22:16 ` Thomas Petazzoni
2014-04-07 0:50 ` Neil Greatorex
2014-04-07 17:41 ` Jason Gunthorpe
2014-04-07 19:41 ` Neil Greatorex
2014-04-07 20:48 ` Jason Gunthorpe
2014-04-07 21:58 ` Neil Greatorex
2014-04-08 6:28 ` Willy Tarreau
2014-04-08 6:40 ` Willy Tarreau
2014-04-08 10:53 ` Matthew Minter
2014-04-08 12:31 ` Matthew Minter
2014-04-08 12:36 ` Willy Tarreau
2014-04-08 14:43 ` Thomas Petazzoni
2014-04-08 14:52 ` Matthew Minter
2014-04-08 14:53 ` Willy Tarreau
2014-04-08 15:25 ` Thomas Petazzoni
2014-04-08 17:56 ` Willy Tarreau
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