mlx4 verbs question

mlx4 verbs question

[Bob Pearson]

Hi,

It has been a long time since I looked at this but I was looking at
ibv_modify_qp on an mlx4 system.
I noticed the following which seems incorrect to me.

>From the RTS state issuing a modify qp with qp_attr_mask only set to state
to the SQD state
Returns qp_attr with qp_state = SQD but if you then issue ibv_query_qp the
state is reported as RTS.
No amount of waiting seems to change this. According to the IBA spec this
should just work without anything special required.

Also for what it's worth most of the errors returned from mlx4 these days
are EXXX e.g. EINVAL.
An exception is the failure of a mailbox command which returns the error
value in the command context i.e. 1.
It would seem better to be consistent in style.

Bob Pearson

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Re: mlx4 verbs question

[Or Gerlitz]

On 3/6/2012 5:44 AM, Bob Pearson wrote:
>  From the RTS state issuing a modify qp with qp_attr_mask only set to state to the SQD state
>

AFAIK SQD isn't supported by connectx

Or.
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RE: mlx4 verbs question

[Bob Pearson]

> -----Original Message-----
> From: Or Gerlitz [mailto:ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org]
> Sent: Tuesday, March 06, 2012 11:16 AM
> To: Bob Pearson
> Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; Tziporet Koren
> Subject: Re: mlx4 verbs question
> 
> On 3/6/2012 5:44 AM, Bob Pearson wrote:
> >  From the RTS state issuing a modify qp with qp_attr_mask only set to
state
> to the SQD state
> >
> 
> AFAIK SQD isn't supported by connectx

But the ibv_modify_qp to SQD works doesn't return an error?! That is where I
was led astray.

> 
> Or.

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RE: mlx4 verbs question

[Bob Pearson]

Oops. Take that back. It didn't work in fact that was the one that returned
the '1'.

> -----Original Message-----
> From: Or Gerlitz [mailto:ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org]
> Sent: Tuesday, March 06, 2012 11:16 AM
> To: Bob Pearson
> Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; Tziporet Koren
> Subject: Re: mlx4 verbs question
> 
> On 3/6/2012 5:44 AM, Bob Pearson wrote:
> >  From the RTS state issuing a modify qp with qp_attr_mask only set to
state
> to the SQD state
> >
> 
> AFAIK SQD isn't supported by connectx
> 
> Or.

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