kern/45917: Unsupported VT6415 PCIE IDE single-channel controller

[Matthew Mondor <mm_lists%pulsar-zone.net@localhost>]

>Number:         45917
>Category:       kern
>Synopsis:       Unsupported VT6415 PCIE IDE single-channel controller
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          support
>Submitter-Id:   net
>Arrival-Date:   Fri Feb 03 02:45:00 +0000 2012
>Originator:     Matthew Mondor
>Release:        NetBSD 5.1_STABLE and NetBSD 5.99.63
>Organization:
>Environment:
NetBSD ninja.xisop 5.1_STABLE NetBSD 5.1_STABLE (GENERIC) #0: Wed Feb  1 
06:51:12 EST 2012  root@ninja.xisop:/usr/obj/sys/arch/amd64/compile/GENERIC 
amd64
Architecture: amd64
Machine: amd64
_
NetBSD 5.99.63 (GENERIC) #2: Thu Feb 2 05:57:31 EST 2012
Architecture: amd64
Machine: amd64

>Description:

Although it's possible to use the disks connected to that interface in
PIO mode, the system is extremely sluggish and unstable, with interrupt
storms, when accessing data on them.  I've tried to add the device and
make viaide.c attach like some of the other supported devices, but have
not succeeded so far.  Perhaps that interface is slightly different
than the others, or that to attach the unsupported PCIE device must
also be supported...

ppb1 at pci0 dev 28 function 0: vendor 0x8086 product 0x1c10 (rev. 0xb5)
ppb1: unsupported PCI Express version
pci2 at ppb1 bus 2
pci2: i/o space, memory space enabled, rd/line, wr/inv ok
ppb2 at pci0 dev 28 function 4: vendor 0x8086 product 0x1c18 (rev. 0xb5)
ppb2: unsupported PCI Express version
pci3 at ppb2 bus 3
pci3: i/o space, memory space enabled, rd/line, wr/inv ok
pciide0 at pci3 dev 0 function 0
pciide0: vendor 0x1106 product 0x0415 (rev. 0x00)
pciide0: bus-master DMA support present, but unused (no driver support)
pciide0: primary channel wired to native-PCI mode
pciide0: using ioapic0 pin 16 for native-PCI interrupt
atabus0 at pciide0 channel 0
pciide0: secondary channel wired to native-PCI mode
atabus1 at pciide0 channel 1

>How-To-Repeat:

Use an Asus P8H67-M PRO motherboard which supports both SATA and PATA,
try to copy data from a PATA drive to the SATA one.  Notice the system
becomming unresponsive.

>Fix:

Some driver attachment stubs to add, more research needed to properly
do it.

>Unformatted:
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