[dpdk-dev] [PATCH] doc: update new ethdev offload API description

[Thomas Monjalon]

21/03/2018 11:54, Ferruh Yigit:
> On 3/21/2018 9:47 AM, Andrew Rybchenko wrote:
> > IMHO, it should be allowed to specify queue offloads on port level.
> > It should simply enable these offloads on all queues. Also it will
> > match dev_info [rt]x_offload_capa which include both port and queue
> > offloads.
> > 
> > Yes, we lose possibility to enable on port level, but disable on queue
> > level by suggested changes, but I think it is OK - if you don't need
> > it for all queues, just control separately on queue level.
> 
> What I understand was queue offload can only enable more, but it seems it can
> both enable or disable.

Yes, queue offload should only enable more.
An offload enabled at port level, cannot be disabled at queue level.
A port offload can be repeated in queue configuration.
If a port offload is not repeated in queue configuration, there should be
no impact: it is still in the port configuration, thus applying to all queues.

About capabilities, the queue offloads must be a subset of port offloads.
The queue capabilities show which offloads can be enabled per queue.