netdev - [PATCH net-next 00/14] nfp: abm: RED/MQ qdisc offload

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Date:   Fri, 25 May 2018 21:53:24 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     davem@...emloft.net
Cc:     jiri@...nulli.us, xiyou.wangcong@...il.com,
        john.fastabend@...il.com, netdev@...r.kernel.org,
        oss-drivers@...ronome.com, alexei.starovoitov@...il.com,
        nogahf@...lanox.com, yuvalm@...lanox.com, gerlitz.or@...il.com,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCH net-next 00/14]  nfp: abm: RED/MQ qdisc offload

Hi!

This is second batch of advanced buffer management nfp driver
changes.  This series adds the qdisc offload.  Support for
a very simple subset of RED qdisc offload is added as needed
for DCTCP ECN marking (min and max thresholds set to the same
value).

The first two patches fix glitches introduced by the previous
series.  We have to be careful about phys_port_name handling,
because VFs share the same code path, and some user space may
get confused by the names we chose.

Since unlike previous offloads we can report the queue backlog
both in bytes and packets we need to adjust how statistics are
added up in the core (patch 6).

There are some extra statistics we want to expose which don't
fit into TC stats, namely counts of packets which have been fast-
-forwarded without getting enqueued because there was no
contention and number of packets that were ever queued (sum of
all momentary backlogs).  We expose those through ethtool stats
(patches 8 and 9).

Remaining 5 patches add MQ offload - to be able to set different
configurations on different queues.  Representors are made multi-
-queue and we add offload support to MQ.  MQ stats are added up
before calling ->dump qdiscs on the children, and therefore don't
include updated offload values.  To avoid clearly incorrect stats
MQ is made to also request stats update from offloads.  This way
we can correct the diff at the driver level.


Jakub Kicinski (14):
  nfp: return -EOPNOTSUPP from .ndo_get_phys_port_name for VFs
  nfp: prefix vNIC phys_port_name with 'n'
  nfp: abm: enable advanced queuing on demand
  nfp: abm: add helpers for configuring queue marking levels
  nfp: abm: add simple RED offload
  net: sched: add qstats.qlen to qlen
  nfp: abm: report statistics from RED offload
  nfp: allow apps to add extra stats to ports
  nfp: abm: expose the internal stats in ethtool
  nfp: abm: expose all PF queues
  net: sched: mq: add simple offload notification
  nfp: abm: multi-queue RED offload
  net: sched: mq: request stats from offloads
  nfp: abm: report correct MQ stats

 drivers/net/ethernet/netronome/nfp/abm/ctrl.c | 275 +++++++++++++
 drivers/net/ethernet/netronome/nfp/abm/main.c | 374 +++++++++++++++++-
 drivers/net/ethernet/netronome/nfp/abm/main.h |  67 ++++
 drivers/net/ethernet/netronome/nfp/nfp_abi.h  |  14 +
 drivers/net/ethernet/netronome/nfp/nfp_app.c  |  22 ++
 drivers/net/ethernet/netronome/nfp/nfp_app.h  |  13 +
 .../ethernet/netronome/nfp/nfp_net_common.c   |  11 +-
 .../ethernet/netronome/nfp/nfp_net_ethtool.c  |  10 +-
 .../net/ethernet/netronome/nfp/nfp_net_repr.c |   5 +-
 .../net/ethernet/netronome/nfp/nfp_net_repr.h |   7 +-
 drivers/net/ethernet/netronome/nfp/nfp_port.h |   2 +
 .../ethernet/netronome/nfp/nfpcore/nfp_cpp.h  |   5 +
 include/linux/netdevice.h                     |   1 +
 include/net/pkt_cls.h                         |  12 +
 include/net/sch_generic.h                     |   4 +-
 net/sched/sch_mq.c                            |  37 ++
 16 files changed, 843 insertions(+), 16 deletions(-)

-- 
2.17.0