Hello!
I am having a problem getting a PCI SCSI card working with PCI
passthrough. I'm using fc14 (2.6.35.10-74.fc14.x86_64) with a AMD
motherboard that others report works fine with IOMMU.
Kernel support seems fine:
[ 0.662640] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x40
And my device is assigned to pci-stub:
/sys/bus/pci/devices/0000:02:06.0/driver -> points to pci-stub
Yet, I get this:
# /usr/bin/qemu-kvm -device
pci-assign,host=02:06.0,id=hostdev0,bus=pci.0,addr=0xc
Using raw in/out ioport access (sysfs - Input/output error)
Failed to assign device "hostdev0" : Device or resource busy
*** The driver 'pci-stub' is occupying your device 0000:02:06.0.
***
*** You can try the following commands to free it:
***
*** $ echo "9005 0010" > /sys/bus/pci/drivers/pci-stub/new_id
*** $ echo "0000:02:06.0" > /sys/bus/pci/drivers/pci-stub/unbind
*** $ echo "0000:02:06.0" > /sys/bus/pci/drivers/pci-stub/bind
*** $ echo "9005 0010" > /sys/bus/pci/drivers/pci-stub/remove_id
***
qemu-kvm: -device
pci-assign,host=02:06.0,id=hostdev0,bus=pci.0,addr=0xc: Device
'pci-assign' could not be initialized
Which seems like a buggy error, as it's already assigned to pci-stub
:) I've tried unbinding it from pci-stub, but same errors (except the
*** messages do go away).
The few messages from dmesg:
[ 2551.020150] pci-stub 0000:02:06.0: restoring config space at offset
0x1 (was 0x2900000, writing 0x2900116)
[ 2551.084292] assign device 0:2:6.0 failed
The device as listed from lspci:
02:06.0 SCSI storage controller: Adaptec AHA-2940U2/U2W
Subsystem: Adaptec AHA-2940U2 SCSI Controller
Flags: bus master, medium devsel, latency 64, IRQ 21
BIST result: 00
I/O ports at b800 [disabled] [size=256]
Memory at fe7ff000 (64-bit, non-prefetchable) [size=4K]
Expansion ROM at fe7c0000 [disabled] [size=128K]
Capabilities: [dc] Power Management version 1
Kernel driver in use: pci-stub
Kernel modules: aic7xxx
And it is not sharing an irq (at lest I don't think so?)... irq 21
from /proc/interrupts
21: 0 0 0 88 IO-APIC-fasteoi
Anyone have any ideas? Greatly appreciated!
FYI -- I am not subscribed to the list, so please CC [email protected]
on replies.
Thanks!
- nick
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