Re: [LinuxBIOS] Disabled device help

[Lu, Yinghai]

The Kernel pci_read_bases in drivers/pci/probe.c. has problem when size
if bigger than 4G.

It will first check the 32 bit SPACE_ADDRESS, and pci_size will return
0, So it will skip that resource. And the pre-set values is ignored.

And later, it will try to allocate the value. It will fail.

I will produce one patch for you.

YH

-----Original Message-----
From: [e-mail]
[mailto:[e-mail]] On Behalf Of Lu, Yinghai
Sent: Friday, November 03, 2006 11:46 AM
To: [e-mail]; LinuxBIOS
Subject: Re: [LinuxBIOS] Disabled device help

Boot log?

In LinuxBIOS, there is CONFIG_PCI_64BIT_PREF_MEM, did you try to enable
it in you MB Options.lb

In the kernel, there is pci_assign_unassigned_resources that try to
allocate resource for some devices, and it could cause problem because
Opteron could bave multi ht chain, Aka peer root bus, and every root bus
need to have its own ioport_resource, and iomem_resource. But that only
happen when BIOS is not allocating resource correctly. And LinuxBIOS
does a good job, and every device have be  handled properly.

In case, you have werid pci devices, you still can use pci_quirks in
kernel to do some fix up.

YH

-----Original Message-----
From: [e-mail]
[mailto:[e-mail]] On Behalf Of Myles Watson
Sent: Friday, November 03, 2006 11:02 AM
To: 'LinuxBIOS'
Subject: [LinuxBIOS] Disabled device help

My large device gets disabled somewhere in LinuxBIOS or the kernel. This
is
the encouraging line from LinuxBIOS telling me that the registers are
indeed
set correctly.

PCI: 05:01.0 18 <- [8000000000 - bfffffffff] prefmem64

Unfortunately, Linux sees something different and fails to allocate this
region because it sees it at 00000080-000000bf and that conflicts with
other
things.

Does anyone have a pointer to where I should look for this problem? Has
anyone else had problems with devices larger than 4GB?

Thanks,
Myles