[Intel-wired-lan] [PATCH iwl-next 1/3] libeth: add __libeth_rx_sync_for_cpu

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces at osuosl.org> On Behalf
> Of Matt Vollrath
> Sent: Friday, July 31, 2026 2:41 PM
> To: intel-wired-lan at lists.osuosl.org
> Cc: netdev at vger.kernel.org; Lobakin, Aleksander
> <aleksander.lobakin at intel.com>; Nguyen, Anthony L
> <anthony.l.nguyen at intel.com>; Kitszel, Przemyslaw
> <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>; Simon Horman <horms at kernel.org>; Matt Vollrath
> <tactii at gmail.com>
> Subject: [Intel-wired-lan] [PATCH iwl-next 1/3] libeth: add
> __libeth_rx_sync_for_cpu
> 
> Deriving a netmem's page pool from the ref requires loading a pointer
> from the netmem_desc, which may not be cached. The driver may already
> have a cached reference to the correct page pool, so add a bypass.
> 
> No functional change for existing callers.
> 
> Signed-off-by: Matt Vollrath <tactii at gmail.com>
> Assisted-by: Claude:claude-5-fable
> ---
>  include/net/libeth/rx.h | 37 ++++++++++++++++++++++++++-----------
>  1 file changed, 26 insertions(+), 11 deletions(-)
> 
> diff --git a/include/net/libeth/rx.h b/include/net/libeth/rx.h index
> 5d991404845e..fddac084e001 100644
> --- a/include/net/libeth/rx.h
> +++ b/include/net/libeth/rx.h
> @@ -118,36 +118,51 @@ static inline dma_addr_t libeth_rx_alloc(const
> struct libeth_fq_fp *fq, u32 i)  void
> libeth_rx_recycle_slow(netmem_ref netmem);
> 
>  /**

...

>  /* Converting abstract packet type numbers into a software structure
> with
>   * the packet parameters to do O(1) lookup on Rx.
>   */
> --
> 2.43.0

Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov at intel.com>