linux-kernel - Re: d63e2e1f3df breaks sparc/T5-8

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Message-ID: <CAE9FiQXu8qvCo9Dx6vUBXEO029n8K=c=CGtsfvWMGYdVgqtgOw@mail.gmail.com>
Date:	Sun, 29 Mar 2015 13:07:44 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	David Ahern <david.ahern@...cle.com>,
	David Miller <davem@...emloft.net>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"sparclinux@...r.kernel.org" <sparclinux@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: d63e2e1f3df breaks sparc/T5-8

On Sun, Mar 29, 2015 at 7:47 AM, David Ahern <david.ahern@...cle.com> wrote:
> On 3/28/15 2:24 PM, Yinghai Lu wrote:
>>
>> Can you append "ofpci_debug=1" in boot command line?
>
>
> here you go.


[  286.647560] PCI: scan_bus[/pci@.../pci@...ci@...ci@6] bus no 8
[  286.921232] PCI: Claiming 0000:00:01.0: Resource 15:
0000800100000000..00008004afffffff [220c]
[  287.229190] PCI: Claiming 0000:01:00.0: Resource 15:
0000800100000000..00008004afffffff [220c]
[  287.533428] PCI: Claiming 0000:02:04.0: Resource 15:
0000800100000000..000080012fffffff [220c]
[  288.149831] PCI: Claiming 0000:03:00.0: Resource 15:
0000800100000000..000080012fffffff [220c]
[  288.252466] PCI: Claiming 0000:04:06.0: Resource 14:
0000800100000000..000080010fffffff [220c]
[  288.867196] PCI: Claiming 0000:05:00.0: Resource 0:
0000800100000000..0000800100001fff [204]
[  288.968221] pci 0000:05:00.0: can't claim BAR 0 [mem
0x800100000000-0x800100001fff]: no compatible bridge window

the bridge resource has IORESOURCE_PREFETCH, but the device doesn't have that.

So pci_claim_resource can not find parent resource for device
resource: we can not
put non pref mem under pref mem.

Can you send out result from ?
lspci -vvxxx -s 0000:05:00.0

If it does have pref, could be of device layer does not pass the pref
flag properly
via pci_parse_of_addrs/of_get_property(node, "assigned-addresses".

or the addr0 from "ranges" and "assigned-address" has different definition.

Thanks

Yinghai
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