(unknown charset) Recent ATA changes break Thinkpad T40p

Søren,

It looks like the changes you made to ATA IRQ handling in the last few
days broke ATA support on my laptop, an IBM Thinkpad T40p.

atapci0: <Intel ICH4 UDMA100 controller> port
0x1860-0x186f,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 31.1 on pci0

atapci0_at_pci0:31:1:      class=0x01018a card=0x052d1014 chip=0x24ca8086
rev=0x01 hdr=0x00
    vendor   = 'Intel Corporation'
    device   = '82801DBM (ICH4-M) UltraATA/100 EIDE Controller'
    class    = mass storage
    subclass = ATA

Specifically, soon after boot I see messages like:

ad0: WARNING - READ_DMA interrupt was seen but timeout fired LBA=11284415
ad0: WARNING - READ_DMA interrupt was seen but timeout fired LBA=18509695
ad0: WARNING - READ_DMA interrupt was seen but timeout fired LBA=18509695
ad0: WARNING - WRITE_DMA interrupt was seen but timeout fired LBA=18145055
ad0: WARNING - WRITE_DMA interrupt was seen but timeout fired LBA=11143807
ad0: WARNING - READ_DMA interrupt was seen but timeout fired LBA=2864319
ad0: WARNING - READ_DMA interrupt was seen but timeout fired LBA=16768927
ad0: WARNING - READ_DMA interrupt was seen but timeout fired LBA=16768927
ad0: WARNING - READ_DMA interrupt was seen but taskqueue stalled LBA=16768927

Userland processes become "stuck" after the taskqueue stall.

Last working kernel:
(I would still get the READ_DMA/WRITE_DMA warning messages with this
kernel after resuming from suspend.  A reboot would resolve the issue.)

$FreeBSD: src/sys/dev/ata/ata-all.c,v 1.215 2004/07/12 10:50:49 sos Exp $
$FreeBSD: src/sys/dev/ata/ata-queue.c,v 1.29 2004/06/01 12:26:08 sos Exp $
$FreeBSD: src/sys/dev/ata/ata-lowlevel.c,v 1.40 2004/07/24 19:03:28 sos Exp $
$FreeBSD: src/sys/dev/ata/ata-isa.c,v 1.22 2004/04/30 16:21:34 sos Exp $
$FreeBSD: src/sys/dev/ata/ata-card.c,v 1.25 2004/05/27 03:49:40 imp Exp $
$FreeBSD: src/sys/dev/ata/ata-pci.c,v 1.85 2004/06/15 11:02:09 sos Exp $
$FreeBSD: src/sys/dev/ata/ata-chipset.c,v 1.76 2004/07/17 14:48:46 sos Exp $
$FreeBSD: src/sys/dev/ata/ata-dma.c,v 1.126 2004/04/13 09:44:20 sos Exp $
$FreeBSD: src/sys/dev/ata/ata-disk.c,v 1.174 2004/07/12 10:50:50 sos Exp $
$FreeBSD: src/sys/dev/ata/ata-raid.c,v 1.80 2004/06/30 09:22:47 sos Exp $
$FreeBSD: src/sys/dev/ata/atapi-cd.c,v 1.168 2004/06/22 11:18:24 sos Exp $
$FreeBSD: src/sys/dev/ata/atapi-fd.c,v 1.96 2004/06/22 11:18:25 sos Exp $
$FreeBSD: src/sys/dev/ata/atapi-tape.c,v 1.92 2004/06/22 11:18:25 sos Exp $

Broken kernel:

$FreeBSD: src/sys/dev/ata/ata-all.c,v 1.222 2004/08/16 09:32:35 sos Exp $
$FreeBSD: src/sys/dev/ata/ata-queue.c,v 1.32 2004/08/16 09:32:35 sos Exp $
$FreeBSD: src/sys/dev/ata/ata-lowlevel.c,v 1.44 2004/08/16 09:32:35 sos Exp $
$FreeBSD: src/sys/dev/ata/ata-isa.c,v 1.22 2004/04/30 16:21:34 sos Exp $
$FreeBSD: src/sys/dev/ata/ata-card.c,v 1.25 2004/05/27 03:49:40 imp Exp $
$FreeBSD: src/sys/dev/ata/ata-pci.c,v 1.87 2004/08/12 08:20:36 sos Exp $
$FreeBSD: src/sys/dev/ata/ata-chipset.c,v 1.81 2004/08/16 09:29:46 sos Exp $
$FreeBSD: src/sys/dev/ata/ata-dma.c,v 1.129 2004/08/13 08:14:27 sos Exp $
$FreeBSD: src/sys/dev/ata/ata-disk.c,v 1.175 2004/08/05 21:11:32 sos Exp $
$FreeBSD: src/sys/dev/ata/ata-raid.c,v 1.81 2004/08/09 14:22:58 sos Exp $
$FreeBSD: src/sys/dev/ata/atapi-cd.c,v 1.170 2004/08/08 07:57:50 phk Exp $
$FreeBSD: src/sys/dev/ata/atapi-fd.c,v 1.97 2004/08/05 21:11:33 sos Exp $
$FreeBSD: src/sys/dev/ata/atapi-tape.c,v 1.93 2004/08/05 21:11:33 sos Exp $

Any other information I can provide you?

Thanks,

  - Brian