Re: [PATCH 0/5] SATA/ACPI suspend/resume support

[Jae-hyeon Park <jhpark@tuhep.phys.tohoku.ac.jp>]

Randy Dunlap <randy_d_dunlap@linux.intel.com> writes:

> On 05 Jan 2006 23:08:12 +0900
> Jae-hyeon Park <jhpark@tuhep.phys.tohoku.ac.jp> wrote:
> 
> > Randy Dunlap <randy_d_dunlap@linux.intel.com> writes:
> > >
> > > Does your system work without using the AHCI driver?
> > > or is it required?
> > 
> > I tested turning off AHCI with 2.6.15-rc7 + git-libata-all.patch +
> > libata_resume_fix.patch + libata_suspend-fix.patch +
> > libata_suspend.patch.  The system runs okay, and ACPI suspend/resume
> > and suspend2 work, without AHCI.
> > 
> > > Of course, even if the AHCI driver is not needed,
> > > it shouldn't be oopsing like this.
> > > 
> > > It looks like the ata_piix driver is the one that is
> > > actually being used, from what I can see here.
> > > 
> > > Please send your /proc/interrupts, /proc/iomem, /proc/ioports,
> > > and 'lspci -v'.
> > 
> > They are enclosed below.
> 
> Hi,
> While I'm looking over this, do you have a mode in which
> the AHCI driver loads successfully?  If so, look for a
> kernel message similar to this one:
> 
> ahci 0000:00:1f.2: AHCI 0001.0100 32 slots 4 ports 1.5 Gbps 0x5 impl SATA mode
> 
> and post it, please.  (I think that it won't say "SATA mode".)
> The "prog-if" value of 80 from your lspci output is interesting to me:
> 0000:00:1f.2 IDE interface: Intel Corporation 82801FBM (ICH6M) SATA Controller (rev 03) (prog-if 80 [Master])
> 

I couldn't find a line like that from a working kernel with AHCI
option on.  The only ahci-related lines look like

    ahci 0000:00:1f.2: version 1.2
    ahci: probe of 0000:00:1f.2 failed with error -12

I selected AHCI because the lines in ata_piix.c

	{ 0x8086, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_rm },

and

	/* ich6_sata_rm */
	{
		.sht		= &piix_sht,
		.host_flags	= ATA_FLAG_SATA | ATA_FLAG_SRST |
				  PIIX_FLAG_COMBINED | PIIX_FLAG_CHECKINTR |
				  ATA_FLAG_SLAVE_POSS | PIIX_FLAG_AHCI,
		.pio_mask	= 0x1f,	/* pio0-4 */
		.mwdma_mask	= 0x07, /* mwdma0-2 */
		.udma_mask	= 0x7f,	/* udma0-6 */
		.port_ops	= &piix_sata_ops,
	},

seemed to indicate that my controller was ahci-capable.
But according to
http://marc.theaimsgroup.com/?l=linux-ide&m=111828214909335&w=2,
my system does not support AHCI.  I don't see Region 5 in the output
of lspci -vv -s 00:1f.2.

Jae-hyeon