Re: [PATCH 1/2] opensm/osm_state_mgr.c: Don't rely on PortInfo:PortState for base SP0

[Hal Rosenstock <hal-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>]

On 4/21/2011 8:22 AM, Alex Netes wrote:
> On 10:43 Wed 20 Apr     , Hal Rosenstock wrote:
>> Hi Alex,
>>
>> On 4/20/2011 10:17 AM, Alex Netes wrote:
>>> Hi Hal,
>>>
>>> On 09:29 Mon 18 Apr     , Hal Rosenstock wrote:
>>>>
>>>> For base SP0, PortState in SM PortInfo attribute is not used and base SP0
>>>> is always "active". 
>>>
>>> How SM can be attached to base SP0?
>>
>> What precludes this ? AFAIK SM can run on any switch port 0 whether
>> enhanced or base.
>>
> 
> I'm probably missing something. Base Switch Port 0 - A Switch Port 0 which is
> not an Endport (IBTA p71). 

The glossary is only informative (and not compliance) and has a number
of such issues.

You can see that the Endport definition on p.73 contradicts this:
"All Channel Adapter ports on the subnet are
endports of that subnet, as is Port 0 of each Switch in the subnet.
Switch ports other than Port 0 may not be endports."

A spec comment (RefID 4352) was entered quite some time ago on this to
change this to something like:

A <Switch Port 0> with a set of basic capabilities (defined in this
specification). That set is less than the capabilities of an <Enhanced
Switch Port 0>, and also less than the minimum set of capabilities
required of a <Target Channel Adapter>.

> If you look further, Endport defined as a Port which can be a destination of 
> LID-routed communication within the same Subnet as the sender.

Actually this is imprecise as well as the phrase "within the same Subnet
as the sender" should be eliminated.

> How can SM be attached to a port which isn't an Endport?

Base SP0 does have a LID (look at PortInfo:LID Used By column is X'd).

-- Hal

> -- Alex
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