linux-kernel - [PATCH iwl-next 0/5] ice: add support for devmem/io

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Message-ID: <20251125173603.3834486-1-aleksander.lobakin@intel.com>
Date: Tue, 25 Nov 2025 18:35:58 +0100
From: Alexander Lobakin <aleksander.lobakin@...el.com>
To: intel-wired-lan@...ts.osuosl.org
Cc: Alexander Lobakin <aleksander.lobakin@...el.com>,
	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>,
	Simon Horman <horms@...nel.org>,
	Jacob Keller <jacob.e.keller@...el.com>,
	Aleksandr Loktionov <aleksandr.loktionov@...el.com>,
	nxne.cnse.osdt.itp.upstreaming@...el.com,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH iwl-next 0/5] ice: add support for devmem/io_uring Rx and Tx

Now that ice uses libeth for managing Rx buffers and supports
configurable header split, it's ready to get support for sending
and receiving packets with unreadable (to the kernel) frags.

Extend libeth just a little bit to allow creating PPs with custom
memory providers and make sure ice works correctly with the netdev
ops locking. Then add the full set of queue_mgmt_ops and don't
unmap unreadable frags on Tx completion.
No perf regressions for the regular flows and no code duplication
implied.

Credits to the fbnic developers, which's code helped me understand
the memory providers and queue_mgmt_ops logics and served as
a reference.

Alexander Lobakin (5):
  libeth: pass Rx queue index to PP when creating a fill queue
  libeth: handle creating pools with unreadable buffers
  ice: migrate to netdev ops lock
  ice: implement Rx queue management ops
  ice: add support for transmitting unreadable frags

 drivers/net/ethernet/intel/ice/ice_lib.h    |  11 +-
 drivers/net/ethernet/intel/ice/ice_txrx.h   |   2 +
 drivers/net/ethernet/intel/idpf/idpf_txrx.h |   2 +
 include/net/libeth/rx.h                     |   2 +
 include/net/libeth/tx.h                     |   2 +-
 drivers/net/ethernet/intel/iavf/iavf_txrx.c |   1 +
 drivers/net/ethernet/intel/ice/ice_base.c   | 194 ++++++++++++++------
 drivers/net/ethernet/intel/ice/ice_lib.c    |  56 +++++-
 drivers/net/ethernet/intel/ice/ice_main.c   |  50 ++---
 drivers/net/ethernet/intel/ice/ice_sf_eth.c |   2 +
 drivers/net/ethernet/intel/ice/ice_txrx.c   |  43 +++--
 drivers/net/ethernet/intel/ice/ice_xsk.c    |   4 +-
 drivers/net/ethernet/intel/idpf/idpf_txrx.c |  13 ++
 drivers/net/ethernet/intel/libeth/rx.c      |  43 +++++
 14 files changed, 322 insertions(+), 103 deletions(-)

---
Testing hints:
* regular Rx and Tx for regressions;
* <kernel root>/tools/testing/selftests/drivers/net/hw/ contains
  scripts for testing netmem Rx and Tx, namely devmem.py and
  iou-zcrx.py (read the documentation first).
-- 
2.51.1