[Xen-devel] PCI passthrough of Symbios Logic 53c875 SCSI controller fails

[Orion Poplawski <orion@xxxxxxxxxxxxx>]

Trying to get PCI passthrough working for a Symbios Logic 53c875 SCSI
controller.  Running CentOS 5.2 and 3.0.3-73 but with test kernel
2.6.18-132.el5virttest10xen on the Dom0.

First I needed to add 1000:000f to xend-pci-permissive.sxp because of:

pciback 0000:04:09.0: Driver tried to write to a read-only configuration space
field at offset 0x44, size 2.

The controller fails on the CentOS 5.2 guest with:

SCSI subsystem initialized
PCI: Enabling device 0000:00:00.0 (0000 -> 0003)
sym0: <875> rev 0x26 at pci 0000:00:00.0 irq 20
sym0: Tekram NVRAM, ID 7, Fast-20, SE, parity checking 
Failed to obtain physical IRQ 20
sym0: SCSI BUS has been reset.
scsi0 : sym-2.2.3 
scsi 0:0:0:0: ABORT operation started. 
scsi 0:0:0:0: ABORT operation timed-out. 
scsi 0:0:0:0: DEVICE RESET operation started.
scsi 0:0:0:0: DEVICE RESET operation timed-out.
scsi 0:0:0:0: BUS RESET operation started.
scsi 0:0:0:0: BUS RESET operation timed-out.
scsi 0:0:0:0: HOST RESET operation started.
sym0: SCSI BUS has been reset.           
scsi 0:0:0:0: HOST RESET operation timed-out.
scsi 0:0:0:0: scsi: Device offlined - not ready after error recovery  
....


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