PCI speed

[Dirk-Willem van Gulik]

> On 3 Mar 2017, at 23:52, Warner Losh <imp at bsdimp.com> wrote:
> 
> On Fri, Mar 3, 2017 at 3:34 PM, Dirk-Willem van Gulik
> <dirkx at webweaving.org> wrote:
>> Forgive me my ignorance - but for some cards - pciconf(8) nicely lists the speed of the bus:
>> 
>>> ciss0 at pci0:12:0:0:      class=0x010400 card=0x3243103c chip=0x323a103c rev=0x01 hdr=0x00
>> ...
>>>   cap 10[70] = PCI-Express 2 endpoint max data 128(256) RO NS
>>>                link x4(x8) speed 5.0(5.0)
>> 
>> and that matches exactly with what it is. While for other cards it does not seem to report that:
> 
> So you have a x8 card in a x4 slot. Hope that's OK. It's also
> reporting errors on the PCIe link level. That doesn't sound too
> correct.

It ended up being quite a rat-hole - further examination showed that some on motherboard soldered P410 and NC382i ethernets where reporting just as oddly!

>>> mpt4 at pci0:7:8:1:        class=0x010000 card=0x10b01000 chip=0x00301000 rev=0x08 hdr=0x00
>> ....
>>>   cap 07[68] = PCI-X 64-bit supports 133MHz, 2048 burst read, 8 split transactions
>> 
>> and in fact seems to mis report the bus - this is a  PCIe Gen 2 x4 bus with a x8 Connector Width
>> holding  a LSI 22320SE Ultra320 SCSI dual channel PCIe X4 card.
> 
>> How should one interpret this ?
> 
> That's odd. I'd have expected it to report correctly... It does for us at work.
> What version of FreeBSD?

FreeBSD 11.0 - p7. The HW are fairly plain DL385 G7 and G8 frames with AMD cpu's and two risers (One bus x8, connector 16 and two x4bus and x8 connector). Two hold an P410i/2048MB cards; two P222/512Mb cards and one LSILogic 1030 Ultra4 Adapter.

We've since looked at multiple DL385's and found the results to be a total mess; with reports even differing between the first boot after a hard power cycle and the next boot(s). Googling & Escalation within HPE suggests that it is one large firmware mess with conflicting reports (P2222 cards clashing with the Qlogic needs). 

So I guess this is a rathole best left closed. Old HP kit is essentially not worth it anymore given their serial#/paid-support burden.

Dw.