Lost CDROM on 9.1 with ATA_CAM on Promise controller

[Jeremy Chadwick]

On Wed, Apr 17, 2013 at 08:26:00AM +0200, Andre Albsmeier wrote:
> On Tue, 16-Apr-2013 at 21:38:22 +0200, Jeremy Chadwick wrote:
> > On Tue, Apr 16, 2013 at 07:55:20PM +0200, Andre Albsmeier wrote:
> > > I have lost one of my CDROM drives (HL-DT-STDVD-RAM GH22LP20/2.00)
> > > after going from 7.4 to 9.1 when using ATA_CAM. It is attached to
> > > a Promise PDC20268 UDMA100 controller. A standard harddisk drive
> > > attached to this controller works well. Cables, controller and drive
> > > where replaced already.
> > > 
> > > Kernel gives me:
> > > 
> > > atapci1: <Promise PDC20268 UDMA100 controller> port 0xb000-0xb007,0xa800-0xa803,0xa400-0xa407,0xa000-0xa003,0x9800-0x980f mem 0xdf800000-0xdf803fff irq 11 at device 12.0 on pci0
> > > ata2: <ATA channel> at channel 0 on atapci1
> > > ata3: <ATA channel> at channel 1 on atapci1
> > > ...
> > > ada0 at ata2 bus 0 scbus2 target 0 lun 0
> > > ada0: <Maxtor 7B300R0 BAH41G10> ATA-7 device
> > > ada0: 100.000MB/s transfers (UDMA5, PIO 8192bytes)
> > > ada0: 286188MB (586114704 512 byte sectors: 16H 63S/T 16383C)
> > > ...
> > > (cd2:ata3:0:0:0): got CAM status 0x50
> > > (cd2:ata3:0:0:0): fatal error, failed to attach to device
> > > (cd2:ata3:0:0:0): lost device, 4 refs
> > > (cd2:ata3:0:0:0): removing device entry
> > > ...
> > > 
> > > Attaching the CDROM drive to the controller that is integrated on
> > > the mainboard (Intel PIIX4 UDMA33 controller) does not show this
> > > problem (but here I don't have UDMA66).
> > > 
> > > It also works when not using ATA_CAM:
> > > 
> > > ...
> > > acd0: DVDR <HL-DT-STDVD-RAM GH22LP20/2.00> at ata3-master UDMA66 
> > > ...
> > > 
> > > So this semes to be a problem with the Promise controller and ATA_CAM.
> > > 
> > > Any ideas? Or should I file PR?
> > 
> > The controller in question is a Promise Ultra100 TX2.
> 
> Right. Tried with an Ultra133, same effect.
> 
> > 
> > The error message comes from sys/cam/scsi/scsi_cd.c, in function
> > cddone().  The logic is a little hard for me to follow (I understand
> > about 70% of it).  Look at lines 1724 to 1877 for stable/9.
> > 
> > 1. Can you provide full output from a verbose boot when the CD/DVD drive
> > is attached to the Promise controller?
> 
> Attached below. I have just filtered out some ahc cruft...
> 
> Later I will try to boot a -current kernel -- just to see
> how this behaves...
> 
> > 
> > 2. What firmware version the card is using?  The PDC20268 had many, many
> > firmware problems relating to ATAPI devices.
> 
> It is the latest BIOS: 2.20.0.15.
> 
> > 
> > 3. I wouldn't worry about ATA66 vs. ATA33; this drive can only support
> > up to about 22MBytes/second so ATA66 isn't going to get you anything,
> > so as a workaround, using the PIIX4 for it would not hurt you.
> 
> Probably. But I already had cdrecord complain when it
> came to the funky DMA speed test it is doing. It went
> away when using the UDMA66 port. And on the other hand
> I sometimes use the PIIX4 port for other stuff and I
> do not want to attach the cdrom to the slave port.
> 
> > 
> > 4. ONLY if this turns out to be a "controller thing": I'm not sure how
> > much effort should be spent trying to make this work, as the PDC20268 is
> > legacy/deprecated hardware (made/released 13 years ago).
> 
> The whole box is more than 13 years old (good old Asus BX board) ;-)
> 
> But since it worked in 7.4-STABLE I feel that this is some kind
> of regression. I do not want to waste anyone's resources in fixing
> it -- just if someone is curious and/or has an idea how to fix
> it...
> 
> And here is the dmesg:
>
> {snipping for mail brevity}

Thanks.  CC'd ken@ and mav@ for advice on this.  Here's the dmesg:

http://lists.freebsd.org/pipermail/freebsd-stable/2013-April/073131.html

Short details:

The device under scrutiny here is cd2 on ata3, which is an ATAPI
IDE-based optical drive.  The drive works when either:

a) Connected to a different IDE controller (atapci0), or,
b) When ATA_CAM is removed (i.e. use ata(4) exclusively).

No idea if atapicam(4) during scenario (b) works or not.  :-)

-- 
| Jeremy Chadwick                                   jdc at koitsu.org |
| UNIX Systems Administrator                http://jdc.koitsu.org/ |
| Mountain View, CA, US                                            |
| Making life hard for others since 1977.             PGP 4BD6C0CB |