netdev - Re: [PATCH v2 3/5] ixgbe: add AF

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Message-ID: <CALDO+SZ2oPUBwYtBRrVdQTiCcFKaYJVd47VdKQUPWGyidUpmYw@mail.gmail.com>
Date:   Tue, 2 Oct 2018 11:26:24 -0700
From:   William Tu <u9012063@...il.com>
To:     Björn Töpel <bjorn.topel@...il.com>
Cc:     jeffrey.t.kirsher@...el.com, intel-wired-lan@...ts.osuosl.org,
        Björn Töpel <bjorn.topel@...el.com>,
        "Karlsson, Magnus" <magnus.karlsson@...el.com>,
        Magnus Karlsson <magnus.karlsson@...il.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Test <tuc@...are.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: Re: [PATCH v2 3/5] ixgbe: add AF_XDP zero-copy Rx support

On Tue, Oct 2, 2018 at 1:01 AM Björn Töpel <bjorn.topel@...il.com> wrote:
>
> From: Björn Töpel <bjorn.topel@...el.com>
>
> This patch adds zero-copy Rx support for AF_XDP sockets. Instead of
> allocating buffers of type MEM_TYPE_PAGE_SHARED, the Rx frames are
> allocated as MEM_TYPE_ZERO_COPY when AF_XDP is enabled for a certain
> queue.
>
> All AF_XDP specific functions are added to a new file, ixgbe_xsk.c.
>
> Note that when AF_XDP zero-copy is enabled, the XDP action XDP_PASS
> will allocate a new buffer and copy the zero-copy frame prior passing
> it to the kernel stack.
>
> Signed-off-by: Björn Töpel <bjorn.topel@...el.com>
> ---

Thanks!
Tested-by: William Tu <u9012063@...il.com>

>  drivers/net/ethernet/intel/ixgbe/Makefile     |   3 +-
>  drivers/net/ethernet/intel/ixgbe/ixgbe.h      |  27 +-
>  drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c  |  17 +-
>  drivers/net/ethernet/intel/ixgbe/ixgbe_main.c |  78 ++-
>  .../ethernet/intel/ixgbe/ixgbe_txrx_common.h  |  15 +
>  drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c  | 628 ++++++++++++++++++
>  6 files changed, 747 insertions(+), 21 deletions(-)
>  create mode 100644 drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
>