On 08/31/2017 04:44 PM, Andrew Lunn wrote:

On Wed, Aug 30, 2017 at 05:18:45PM -0700, Florian Fainelli wrote:

quoted

Let switch drivers indicate how many RX and TX queues they support. Some
switches, such as Broadcom Starfighter 2 are resigned with 8 egress
queues.

Marvell switches also have egress queue.

Does the SF2 have ingress queues? Marvel don't as far as i known.  So
i wounder if num_rx_queues is useful?

At the moment probably not, since we are not doing anything useful other
than creating the network devices with the indicated number of queues.

Do switches in general have ingress queues? 

They do, at least the Starfigther 2 has, and from the Broadcom tag you
can get such information (BRCM_EG_TC_SHIFT) and you could presumably
record that queue on the SKB. I don't have an use case for that (yet?).
-- 
Florian