Marvell 7042 (sata_mv) fails to initialize drive

[Markus Gutschke <markus@gutschke.com>]

I just tried hooking up a Hitachi 1TB SATA-II drive to a Marvell 7042 
based controller, and the most recent Linux kernel (2.6.23-rc1) fails to 
properly initialize the interface. Here are the relevant kernel messages:

> kernel: [43.312417] sata_mv 0000:06:00.0: version 0.81
> kernel: [43.312752] ACPI: PCI Interrupt Link [APC5] enabled at IRQ 16
> kernel: [43.312757] ACPI: PCI Interrupt 0000:06:00.0[A] -> Link [APC5] -> GSI 16 (level, low) -> IRQ 16
> kernel: [43.312788] sata_mv 0000:06:00.0: Applying 60X1C0 workarounds to unknown rev
> kernel: [43.314443] sata_mv 0000:06:00.0: Gen-IIE 32 slots 4 ports SCSI mode IRQ via INTx
> kernel: [43.314535] scsi0 : sata_mv
> kernel: [43.314581] scsi1 : sata_mv
> kernel: [43.314614] scsi2 : sata_mv
> kernel: [43.314640] scsi3 : sata_mv
> kernel: [43.314660] ata1: SATA max UDMA/133 cmd 0x0000000000000000 ctl 0xffffc20003522120 bmdma 0x0000000000000000 irq 16
> kernel: [43.314663] ata2: SATA max UDMA/133 cmd 0x0000000000000000 ctl 0xffffc20003524120 bmdma 0x0000000000000000 irq 16
> kernel: [43.314666] ata3: SATA max UDMA/133 cmd 0x0000000000000000 ctl 0xffffc20003526120 bmdma 0x0000000000000000 irq 16
> kernel: [43.314669] ata4: SATA max UDMA/133 cmd 0x0000000000000000 ctl 0xffffc20003528120 bmdma 0x0000000000000000 irq 16
> kernel: [53.409086] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
> kernel: [59.741602] ata1: EH pending after completion, repeating EH (cnt=4)
> kernel: [59.777642] ata2: SATA link down (SStatus 0 SControl 300)
> kernel: [59.809752] ata3: SATA link down (SStatus 0 SControl 300)
> kernel: [59.841740] ata4: SATA link down (SStatus 0 SControl 300) 

The kernel never even registers the drive as an available disk device, 
whereas everything appears to work fine, if I connect the disk to one of 
the other controllers (JMicron AHCI, or NVidia sata_nv) on this motherboard.

As I have two of those disks (in a RAID-1 array) and multiple 
independent controllers, it is relatively easy for me to do some testing 
here. The worst case scenario is that I need to wait a couple of hours 
for the array to rebuild itself after I am done experimenting.

Let me know, if there is anything I can do to help you diagnose the root 
cause, or whether this is a known bug and you don't need any help 
testing at this point.


Markus