On Fri, 2005-09-23 at 15:42 -0400, Brett Russ wrote:

This is my libata compatible low level driver for the Marvell SATA
family.  Currently it runs in DMA mode on a 6081 chip with caveats
(see below).

The 5xxx series parts are not yet DMA capable in this driver because
the registers have differences that haven't been accounted for yet.
Basically, I'm focused on the 6xxx series right now.  There are
numerous improvements in the driver that will affect PIO mode for all
parts, so it's worth running the new driver for all users.

Caveats...there is an outstanding panic in the scsi layer when hitting
error conditions.  I've also seen a hang, also apparently during error
conditions.  I will reply to this message with details of the panics
and will cc the scsi list as well.  Basically, error handling has a
bug.

All failures are under active debug but I wanted to get this out for
review sooner rather than later.

Thank you,
BR

Hi Brett,

Here are the results of a quick test of the driver patch applied to
2.6.14-rc2.  Both tests were performed on a dual Xeon with
hyperthreading enabled.  A single Western Digital WD360 raptor drive was
attached to the controller:

MV88SX5081 8-port SATA I PCI-X Controller:

CPU 3: Machine Check Exception: 0000000000000004
CPU 2: Machine Check Exception: 0000000000000004

There are no other messages, and the machine locks up solid.

MV88SX6081 8-port SATA II PCI-X Controller (rev 09):

libata version 1.12 loaded.
sata_mv version 0.19
ACPI: PCI Interrupt 0000:03:03.0[A] -> GSI 28 (level, low) -> IRQ 209
sata_mv(0000:03:03.0) 32 slots 8 ports SCSI mode IRQ via MSI
ata1: SATA max UDMA/133 cmd 0x0 ctl 0xF8BA2120 bmdma 0x0 irq 209
ata2: SATA max UDMA/133 cmd 0x0 ctl 0xF8BA4120 bmdma 0x0 irq 209
ata3: SATA max UDMA/133 cmd 0x0 ctl 0xF8BA6120 bmdma 0x0 irq 209
ata4: SATA max UDMA/133 cmd 0x0 ctl 0xF8BA8120 bmdma 0x0 irq 209
ata5: SATA max UDMA/133 cmd 0x0 ctl 0xF8BB2120 bmdma 0x0 irq 209
ata6: SATA max UDMA/133 cmd 0x0 ctl 0xF8BB4120 bmdma 0x0 irq 209
ata7: SATA max UDMA/133 cmd 0x0 ctl 0xF8BB6120 bmdma 0x0 irq 209
ata8: SATA max UDMA/133 cmd 0x0 ctl 0xF8BB8120 bmdma 0x0 irq 209
ata1: no device found (phy stat 00000000)
scsi0 : sata_mv
ata2: no device found (phy stat 00000000)
scsi1 : sata_mv
ata3: no device found (phy stat 00000000)
scsi2 : sata_mv
ata4: no device found (phy stat 00000000)
scsi3 : sata_mv
ATA: abnormal status 0x80 on port 0xF8BB211C
ATA: abnormal status 0x80 on port 0xF8BB211C
ATA: abnormal status 0x80 on port 0xF8BB211C
ATA: abnormal status 0x80 on port 0xF8BB211C
ATA: abnormal status 0x80 on port 0xF8BB211C
ATA: abnormal status 0x80 on port 0xF8BB211C
ata5: PIO error, drv_stat 0x50
ata5: dev 0 cfg 49:0000 82:0000 83:0000 84:0000 85:0000 86:0000 87:0000
88:0000
ata5: no dma/lba
ata5: dev 0 not supported, ignoring
scsi4 : sata_mv
ata6: no device found (phy stat 00000000)
scsi5 : sata_mv
ata7: no device found (phy stat 00000000)
scsi6 : sata_mv
ata8: no device found (phy stat 00000000)
scsi7 : sata_mv

Mike