linux-kernel - [PATCH iwl-next 0/9] igc: Add support for Frame Preemption feature in IGC

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Message-Id: <20241216064720.931522-1-faizal.abdul.rahim@linux.intel.com>
Date: Mon, 16 Dec 2024 01:47:11 -0500
From: Faizal Rahim <faizal.abdul.rahim@...ux.intel.com>
To: Tony Nguyen <anthony.l.nguyen@...el.com>,
	Przemek Kitszel <przemyslaw.kitszel@...el.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S . Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Jesper Dangaard Brouer <hawk@...nel.org>,
	John Fastabend <john.fastabend@...il.com>,
	Vinicius Costa Gomes <vinicius.gomes@...el.com>
Cc: Faizal Rahim <faizal.abdul.rahim@...ux.intel.com>,
	intel-wired-lan@...ts.osuosl.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	bpf@...r.kernel.org
Subject: [PATCH iwl-next 0/9] igc: Add support for Frame Preemption feature in IGC

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/20230220122343.1156614-1-vladimir.oltean@nxp.com/
https://patchwork.kernel.org/project/netdevbpf/cover/20230119122705.73054-1-vladimir.oltean@nxp.com/

It builds upon earlier work:
https://patchwork.kernel.org/project/netdevbpf/cover/20220520011538.1098888-1-vinicius.gomes@intel.com/

The first four patches in this series are preparation work for the subsequent patches.

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

Note:
1. preemption can occur with or without the verification handshake,
   depending on the value of the verify_enabled field, which can be
   configured using ethtool --set-mm.
2. Enabling FPE with mqprio offload is not covered in this series, but
   existing code prevents user from configuring FPE alongside mqprio offload.

Faizal Rahim (6):
  igc: Rename xdp_get_tx_ring() for non-xdp usage
  igc: Add support to set MAC Merge data via ethtool
  igc: Add support for frame preemption verification
  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

Vinicius Costa Gomes (3):
  igc: Optimize the TX packet buffer utilization
  igc: Set the RX packet buffer size for TSN mode
  igc: Add support for receiving frames with all zeroes address

 drivers/net/ethernet/intel/igc/igc.h         |  45 ++-
 drivers/net/ethernet/intel/igc/igc_defines.h |  15 +-
 drivers/net/ethernet/intel/igc/igc_ethtool.c |  96 ++++++
 drivers/net/ethernet/intel/igc/igc_main.c    |  80 ++++-
 drivers/net/ethernet/intel/igc/igc_regs.h    |  19 ++
 drivers/net/ethernet/intel/igc/igc_tsn.c     | 330 ++++++++++++++++++-
 drivers/net/ethernet/intel/igc/igc_tsn.h     |  15 +
 7 files changed, 586 insertions(+), 14 deletions(-)

--
2.25.1