linux-kernel - Re: PCI Failed to allocate mem for PCI ROM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20080112072705.GB7234@colo.lackof.org>
Date:	Sat, 12 Jan 2008 00:27:05 -0700
From:	Grant Grundler <grundler@...isc-linux.org>
To:	Kumar Gala <galak@...nel.crashing.org>
Cc:	Greg KH <greg@...ah.com>, LKML <linux-kernel@...r.kernel.org>,
	linuxppc-dev list <linuxppc-dev@...abs.org>,
	linux-pci@...ey.karlin.mff.cuni.cz
Subject: Re: PCI Failed to allocate mem for PCI ROM

On Fri, Jan 11, 2008 at 02:27:16PM -0600, Kumar Gala wrote:
>>> I'm getting the following message from the kernel on an embedded ppc32
>>> system:
>>>
>>> PCI: Failed to allocate mem resource #9:100000@...00000 for 0000:00:00.0
>>>
>>> The HW setup is a PCIe host controller and an e1000 NIC card.
...
> I'm happy to debug, is the fact that the resno == 9 ok or does that seem 
> wrong?

That is fine for the Bridge. See include/linux/pci.h :
#define PCI_ROM_RESOURCE        6
#define PCI_BRIDGE_RESOURCES    7
#define PCI_NUM_RESOURCES       11

IIRC, Bridges may have two 32-bit or one 64-bit BAR, Expansion ROM BAR and
three "range" registers: IO Port, MMIO (Prefetchable and non-prefetchable).
The BRIDGE_RESOURCES (7-10) are what failed to be assigned for some reason.

Looking at setup-bus.c:pci_bridge_check_ranges(), I'm concluding that:
[7] is IO Range.
[8] is MMIO
[9] is Prefetchable MMIO
[10] no clue...maybe used by host PCI bus controllers.

0x100000 is 1MB and would be the minimum MMIO range that can be allocated.
So that looks right too. Probably need to find out what is allocating
0xe0000000 instead.

hth,
grant
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/