On Thu, 26 Jul 2007, Andrew Patterson wrote:
> On Thu, 2007-07-26 at 15:36 +0200, Ulrich Windl wrote:
> > Hi,
> >
> > I have a question: The Qlogic ISP2422 chip is said to handle PCI-X 266MHz. So does
> > the HP Itanium2 server rx6600. Basically that was the reason to select that
> > server. The FC-HBA is in a 266 MHz capable slot. However when booting SLES10 SP1
> > for IA64, the logs say:
There's a mixup here in terminology... The QLA2460 card which you
have does in fact support 'PCI-X 266'...
> > <6>QLogic Fibre Channel HBA Driver
> > <6>GSI 49 (level, low) -> CPU 3 (0x0300) vector 51
> > <6>ACPI: PCI Interrupt 0000:0f:01.0[A] -> GSI 49 (level, low) -> IRQ 51
> > <6>qla2xxx 0000:0f:01.0: Found an ISP2422, irq 51, iobase 0xc0000000b0040000
> > [...]
> > <6>qla2xxx 0000:0f:01.0: LOOP UP detected (4 Gbps).
> > <6>qla2xxx 0000:0f:01.0: Topology - (F_Port), Host Loop address 0x0
> > <6>scsi0 : qla2xxx
> > <6>qla2xxx 0000:0f:01.0:
> > <4> QLogic Fibre Channel HBA Driver: 8.01.07-k3
> > <4> QLogic HP AB378-60001 -
> > <4> ISP2422: PCI-X Mode 2 (133 MH4.00.26 [IP] @ 0000:0f:01.0 hdma+, host#=0,
> > fw=4.00.26 [IP]
The 33/66/100/133 values refer to the bus-clock speed at which the
card is operating. As is seen here (although a bit truncated --
separate issue, I'll try to see if I can reproduce this on one of my
HPQ rigs), the card is inserted into a PCI-X Mode-2 capable 133MHz
(bus clock) slot. When operating under this mode, each data-phase
between two devices is divided into 2 sub-phases, effectively doubling
the transfer-data-rate to 266Mhz.
> > <5> Vendor: HP Model: HSV200 Rev: 6100
> > <5> Type: RAID ANSI SCSI revision: 02
> > <5> 0:0:0:0: Attached scsi generic sg0 type 12
> >
> > Now does Linux support the speed of 266 MHz, and is it just displayed incorrectly,
> > or doesn't Linux support the speed of 266MHz yet?
>
> This is a bug in the driver. The lookup table only goes to 133 MHz.
>
> static char *pci_bus_modes[] = {
> "33", "66", "100", "133",
>
> The same problem exists in the scsi_misc tree.
Regards,
Andrew Vasquez
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