tree 035eaaafe988f4ac5eced2f98dfb7ee294350d21
parent 7e5ebd0b785c5e1dbae685d56017a2bf01bad39f
parent 7a1ff9f45be5f947ec2d7b2a4d7ffe28d8ddff14
author David S. Miller <davem@davemloft.net> 1555996173 -0700
committer David S. Miller <davem@davemloft.net> 1555996173 -0700

Merge branch 'mlxsw-Shared-buffer-improvements'

Ido Schimmel says:

====================
mlxsw: Shared buffer improvements

This patchset includes two improvements with regards to shared buffer
configuration in mlxsw.

The first part of this patchset forbids the user from performing illegal
shared buffer configuration that can result in unnecessary packet loss.
In order to better communicate these configuration failures to the user,
extack is propagated from devlink towards drivers. This is done in
patches #1-#8.

The second part of the patchset deals with the shared buffer
configuration of the CPU port. When a packet is trapped by the device,
it is sent across the PCI bus to the attached host CPU. From the
device's perspective, it is as if the packet is transmitted through the
CPU port.

While testing traffic directed at the CPU it became apparent that for
certain packet sizes and certain burst sizes, the current shared buffer
configuration of the CPU port is inadequate and results in packet drops.
The configuration is adjusted by patches #9-#14 that create two new pools
- ingress & egress - which are dedicated for CPU traffic.
====================

Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>