Re: 8.0-beta3 does not detect several ata channels

On Thursday 03 September 2009 1:37:52 pm Rainer Hurling wrote:
> On 01.09.2009 23:17 (UTC+2), John Baldwin wrote:
> > On Tuesday 01 September 2009 4:40:41 pm Rainer Hurling wrote:
> >> On 01.09.2009 21:05 (UTC+2), John Baldwin wrote:
> >>> On Tuesday 01 September 2009 2:49:09 pm Rainer Hurling wrote:
> >>>> On 01.09.2009 19:41 (UTC+2), John Baldwin wrote:
> >>>>> On Tuesday 01 September 2009 12:47:50 pm Rainer Hurling wrote:
> >>>>>> On 01.09.2009 16:02 (UTC+2), John Baldwin wrote:
> >>>>>>> On Monday 31 August 2009 12:03:04 pm Florian Smeets wrote:
> >>>>>>>> On 8/31/09 5:54 PM, Nick Hilliard wrote:
> >>>>>>>>> Hi,
> >>>>>>>>>
> >>>>>>>>> I have a hp proliant ML115 with 6 sata ports which run in ATA mode 
> >>> (bios
> >>>>>>>>> doesn't appear to give the option to use AHCI).  On freebsd 7.x, 
all
> >>>>>>>>> channels are detected.  On freebsd8.0-beta3, the disks attached to 
> > the
> >>>>>>>>> first two SATA ports are not detected, although it detects the 
ports
> >>>>>>>>> themselves.
> >>>>>>>>>
> >>>>>>>>> I've attached a verbose dmesg from freebsd 7.1 and 8.0-beta3.
> >>>>>>>>>
> >>>>>>>>> Any ideas on what's going on here?  This seems like a nasty 
> >>> regression.
> >>>>>>>> There are 3 PRs about this problem: 128686, 132372, 137942.
> >>>>>>>>
> >>>>>>>> i386 version should recognize the disks. amd64 does when you set
> >>>>>>>> hw.pci.mcfg=0 in loader.conf.
> >>>>>>> Hmm, so an idea I had just now.. can you grab a dump of the PCI 
config 
> >>>>> space 
> >>>>>>> for the disk controller in the MCFG vs non-MCFG cases?  That is, 
find 
> >>> the 
> >>>>>>> device's address using pciconf -lv (e.g. pci0:0:30:0 or some such) 
and 
> >>>>> then 
> >>>>>>> run this command under both configurations and save the output:
> >>>>>>>
> >>>>>>> pciconf -r pci0:0:30:0 0:0xfc
> >>>>>>>
> >>>>>> I am not sure if your idea has something to do with my (and some 
other 
> >>>>>> users) problem. So excuse me, if this posting is wrong.
> >>>>>>
> >>>>>> For some month now I am only able to boot CURRENT under amd64 with 
> >>>>>> setting hw.pci.mcfg=0. Under i386 all works fine. Below I listed 
output 
> >>>>>> under i386 and under amd64. Perhaps you are able to get a hint?
> >>>>> Hmm, would you be able to boot with mcfg=1 on amd64 (perhaps using 
> > nfsroot 
> >>> or 
> >>>>> an mfsroot) and capture this output?  The mcfg thing only affects 
access 
> >>> to
> >>>>> PCI config space (what pciconf -r is displaying).  I want to be able 
to 
> >>>>> compare the "broken" case (amd64 mcfg=1) with a working case.
> >>>> My only amd64 system is at home. Sorry, but I have no idea how to start 
> >>>> this system using nfsroot oder mfsroot.
> >>> Ok, I believe some of the other folks reporting an issue with this ATA 
> >>> controller had other disk controllers in the system so they may be able 
to 
> > do 
> >>> this.
> >> Thanks to Kostik Belousov, I tried his hint with live CD. Here it is, 
> >> only for amd64, with snapshot from todays CURRENT:
> >>
> >> #systctl hw.pci.mcfg
> >> hw.pci.mcfg: 1
> > 
> > Hmm, this one is identical to the mcfg=0 one on amd64 (except for a few 
values 
> > that also differ between the working i386 and working amd64).  So it 
doesn't 
> > seem that PCI config access is horribly broken. :(  Perhaps someone can 
spend 
> > some time comparing what the driver does in the two cases with some 
printfs 
> > to see when it starts behaving differently during its attach routine to 
help 
> > narrow this down.
> > 
> 
> Is there any meaning in the differences of pciconf -lv output of i386 
> and amd64 (already shown in older postings)?
> 
> -------------------------------------------
> i386:
> atapci1_at_pci0:0:5:0:     class=0x010185 card=0x72601462 chip=0x037f10de 
> rev=0xa2 hdr=0x00
>      vendor     = 'Nvidia Corp'
>      device     = 'MCP55 SATA/RAID Controller (MCP55S)'
>      class      = mass storage
>      subclass   = ATA
> atapci2_at_pci0:0:5:1:     class=0x010185 card=0x72601462 chip=0x037f10de
> rev=0xa2 hdr=0x00
>      vendor     = 'Nvidia Corp'
>      device     = 'MCP55 SATA/RAID Controller (MCP55S)'
>      class      = mass storage
>      subclass   = ATA
> -------------------------------------------
> amd64:
> atapci1_at_pci0:0:5:0:     class=0x010185 card=0x72601462 chip=0x037f10de 
> rev=0xa2 hdr=0x00
>      class      = mass storage
>      subclass   = ATA
> atapci2_at_pci0:0:5:1:     class=0x010185 card=0x72601462 chip=0x037f10de 
> rev=0xa2 hdr=0x00
>      class      = mass storage
>      subclass   = ATA
> -------------------------------------------
> 
> In the amd64 version there is no vendor and device string. Perhaps a 
> problem of reading or interpreting?

No, the strings are pulled out of /usr/share/misc/pci_vendors based on the 
value in 'chip='.  Since the 'chip=' values are identical it's probably just 
a matter of having different versions of the pci_vendors file.  The only 
thing MCFG affects is how you read the 'chip=' number which are identical in 
the two cases.

-- 
John Baldwin