linux-kernel - [PATCH net-next 0/4] xsk: the lost bits from Chapter III

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Message-ID: <20250206182630.3914318-1-aleksander.lobakin@intel.com>
Date: Thu,  6 Feb 2025 19:26:25 +0100
From: Alexander Lobakin <aleksander.lobakin@...el.com>
To: 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>
Cc: Alexander Lobakin <aleksander.lobakin@...el.com>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	John Fastabend <john.fastabend@...il.com>,
	Andrii Nakryiko <andrii@...nel.org>,
	"Jose E. Marchesi" <jose.marchesi@...cle.com>,
	Toke Høiland-Jørgensen <toke@...hat.com>,
	Magnus Karlsson <magnus.karlsson@...el.com>,
	Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
	Przemek Kitszel <przemyslaw.kitszel@...el.com>,
	Jason Baron <jbaron@...mai.com>,
	Casey Schaufler <casey@...aufler-ca.com>,
	Nathan Chancellor <nathan@...nel.org>,
	bpf@...r.kernel.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next 0/4] xsk: the lost bits from Chapter III

Before introducing libeth_xdp, we need to add a couple more generic
helpers. Notably:

* 01: add generic loop unrolling hint helpers;
* 04: add helper to get both xdp_desc's DMA address and metadata
  pointer in one go, saving several cycles and hotpath object
  code size in drivers (especially when unrolling).

Bonus:

* 02, 03: convert two drivers which were using custom macros to
  generic unrolled_count() (trivial, no object code changes).

Alexander Lobakin (4):
  unroll: add generic loop unroll helpers
  i40e: use generic unrolled_count() macro
  ice: use generic unrolled_count() macro
  xsk: add helper to get &xdp_desc's DMA and meta pointer in one go

 drivers/net/ethernet/intel/i40e/i40e_xsk.h | 10 +----
 drivers/net/ethernet/intel/ice/ice_xsk.h   |  8 ----
 include/linux/unroll.h                     | 44 +++++++++++++++++++++
 include/net/xdp_sock_drv.h                 | 43 ++++++++++++++++++--
 include/net/xsk_buff_pool.h                |  8 ++++
 drivers/net/ethernet/intel/i40e/i40e_xsk.c |  4 +-
 drivers/net/ethernet/intel/ice/ice_xsk.c   |  4 +-
 net/xdp/xsk_buff_pool.c                    | 46 ++++++++++++++++++++--
 8 files changed, 141 insertions(+), 26 deletions(-)

---
Note: 04 had reviews already; in this series, I reused the existing
helpers instead of copying them and eliminated the compound
assignment in favor of a field-by-field one, which generates
the same Asm code (requested by Jakub).
-- 
2.48.1