igc: Add support for Frame Preemption feature in IGC

From:		Faizal Rahim <faizal.abdul.rahim-AT-linux.intel.com>
To:		Tony Nguyen <anthony.l.nguyen-AT-intel.com>, Przemek Kitszel <przemyslaw.kitszel-AT-intel.com>, Andrew Lunn <andrew+netdev-AT-lunn.ch>, "David S . Miller" <davem-AT-davemloft.net>, Eric Dumazet <edumazet-AT-google.com>, Jakub Kicinski <kuba-AT-kernel.org>, Paolo Abeni <pabeni-AT-redhat.com>, Maxime Coquelin <mcoquelin.stm32-AT-gmail.com>, Alexandre Torgue <alexandre.torgue-AT-foss.st.com>, Simon Horman <horms-AT-kernel.org>, Russell King <linux-AT-armlinux.org.uk>, Alexei Starovoitov <ast-AT-kernel.org>, Daniel Borkmann <daniel-AT-iogearbox.net>, Jesper Dangaard Brouer <hawk-AT-kernel.org>, John Fastabend <john.fastabend-AT-gmail.com>, Russell King <rmk+kernel-AT-armlinux.org.uk>, Furong Xu <0x1207-AT-gmail.com>, Vladimir Oltean <vladimir.oltean-AT-nxp.com>, Serge Semin <fancer.lancer-AT-gmail.com>, Xiaolei Wang <xiaolei.wang-AT-windriver.com>, Suraj Jaiswal <quic_jsuraj-AT-quicinc.com>, Kory Maincent <kory.maincent-AT-bootlin.com>, Petr Tesarik <petr-AT-tesarici.cz>, Faizal Rahim <faizal.abdul.rahim-AT-linux.intel.com>, Choong Yong Liang <yong.liang.choong-AT-linux.intel.com>, Kunihiko Hayashi <hayashi.kunihiko-AT-socionext.com>, Vinicius Costa Gomes <vinicius.gomes-AT-intel.com>, intel-wired-lan-AT-lists.osuosl.org, netdev-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, linux-stm32-AT-st-md-mailman.stormreply.com, linux-arm-kernel-AT-lists.infradead.org, bpf-AT-vger.kernel.org
Subject:		[PATCH iwl-next v2 0/9] igc: Add support for Frame Preemption feature in IGC
Date:		Wed, 05 Feb 2025 05:05:15 -0500
Message-ID:		<20250205100524.1138523-1-faizal.abdul.rahim@linux.intel.com>
Archive-link:		Article

Introduces support for the FPE feature in the IGC driver.

The patches aligns with the upstream FPE API:
https://patchwork.kernel.org/project/netdevbpf/cover/2023...
https://patchwork.kernel.org/project/netdevbpf/cover/2023...

It builds upon earlier work:
https://patchwork.kernel.org/project/netdevbpf/cover/2022...

The patch series adds the following functionalities to the IGC driver:
a) Configure FPE using `ethtool --set-mm`.
b) Display FPE settings via `ethtool --show-mm`.
c) View FPE statistics using `ethtool --include-statistics --show-mm'.
e) Enable preemptible/express queue with `fp`:
   tc qdisc add ... root taprio \
   fp E E P P

Change Log:
v1 -> v2:
- Extract the stmmac verification logic into a common library (Vladimir)
- igc to use common library for verification (Vladimir)
- Fix syntax for kernel-doc to use "Return:" (Vladimir)
- Use FIELD_GET instead of manual bit masking (Vladimir)
- Don't assign 0 to statistics counter in igc_ethtool_get_mm_stats() (Vladimir)
- Use pmac-enabled as a condition to allow MAC address value 0 (Vladimir)
- Define macro register value in increasing value order (Vladimir)
- Fix tx-min-frag-size handling for igc (Vladimir)
- Handle link state changes with verification in igc (Vladimir)
- Add static key for fast path code (Vladimir)
- rx_min_frag_size get from constant (Vladimir)

v1: https://patchwork.kernel.org/project/netdevbpf/cover/2024...

Faizal Rahim (8):
  igc: Rename xdp_get_tx_ring() for non-xdp usage
  igc: Optimize the TX packet buffer utilization
  igc: Set the RX packet buffer size for TSN mode
  igc: Add support for frame preemption verification
  igc: Add support to set tx-min-frag-size
  igc: Add support for preemptible traffic class in taprio
  igc: Add support to get MAC Merge data via ethtool
  igc: Add support to get frame preemption statistics via ethtool

Vladimir Oltean (1):
  net: ethtool: mm: extract stmmac verification logic into common
    library

 drivers/net/ethernet/intel/igc/igc.h          |  17 +-
 drivers/net/ethernet/intel/igc/igc_defines.h  |  19 +-
 drivers/net/ethernet/intel/igc/igc_ethtool.c  |  74 ++++++
 drivers/net/ethernet/intel/igc/igc_main.c     |  96 +++++++-
 drivers/net/ethernet/intel/igc/igc_regs.h     |  16 ++
 drivers/net/ethernet/intel/igc/igc_tsn.c      | 210 +++++++++++++++-
 drivers/net/ethernet/intel/igc/igc_tsn.h      |  34 +++
 drivers/net/ethernet/stmicro/stmmac/stmmac.h  |  16 +-
 .../ethernet/stmicro/stmmac/stmmac_ethtool.c  |  41 +---
 .../net/ethernet/stmicro/stmmac/stmmac_fpe.c  | 174 +++-----------
 .../net/ethernet/stmicro/stmmac/stmmac_fpe.h  |   5 -
 .../net/ethernet/stmicro/stmmac/stmmac_main.c |   8 +-
 include/linux/ethtool.h                       |  62 +++++
 net/ethtool/mm.c                              | 225 +++++++++++++++++-
 14 files changed, 780 insertions(+), 217 deletions(-)

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2.34.1