All of lore.kernel.org
 help / color / mirror / Atom feed
From: "Björn Töpel" <bjorn.topel@gmail.com>
To: Kevin Laatz <kevin.laatz@intel.com>
Cc: Netdev <netdev@vger.kernel.org>,
	"Alexei Starovoitov" <ast@kernel.org>,
	"Daniel Borkmann" <daniel@iogearbox.net>,
	"Björn Töpel" <bjorn.topel@intel.com>,
	"Karlsson, Magnus" <magnus.karlsson@intel.com>,
	"Jonathan Lemon" <jonathan.lemon@gmail.com>,
	"Bruce Richardson" <bruce.richardson@intel.com>,
	ciara.loftus@intel.com,
	intel-wired-lan <intel-wired-lan@lists.osuosl.org>,
	bpf <bpf@vger.kernel.org>
Subject: Re: [Intel-wired-lan] [PATCH bpf-next] i40e: fix xdp handle calculations
Date: Thu, 5 Sep 2019 11:29:55 +0200	[thread overview]
Message-ID: <CAJ+HfNib5qSX13wquSe8WbuZ3CMQCyeS2cdhqPG7NTjqvSq2Ew@mail.gmail.com> (raw)
In-Reply-To: <20190905011144.3513-1-kevin.laatz@intel.com>

On Thu, 5 Sep 2019 at 11:27, Kevin Laatz <kevin.laatz@intel.com> wrote:
>
> Currently, we don't add headroom to the handle in i40e_zca_free,
> i40e_alloc_buffer_slow_zc and i40e_alloc_buffer_zc. The addition of the
> headroom to the handle was removed in
> commit 2f86c806a8a8 ("i40e: modify driver for handling offsets"), which
> will break things when headroom is non-zero. This patch fixes this and uses
> xsk_umem_adjust_offset to add it appropritely based on the mode being run.
>
> Fixes: 2f86c806a8a8 ("i40e: modify driver for handling offsets")
> Reported-by: Bjorn Topel <bjorn.topel@intel.com>
> Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>

Thanks Kevin!

Acked-by: Björn Töpel <bjorn.topel@intel.com>

> ---
>  drivers/net/ethernet/intel/i40e/i40e_xsk.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
> index eaca6162a6e6..0373bc6c7e61 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_xsk.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
> @@ -267,7 +267,7 @@ static bool i40e_alloc_buffer_zc(struct i40e_ring *rx_ring,
>         bi->addr = xdp_umem_get_data(umem, handle);
>         bi->addr += hr;
>
> -       bi->handle = handle;
> +       bi->handle = xsk_umem_adjust_offset(umem, handle, umem->headroom);
>
>         xsk_umem_discard_addr(umem);
>         return true;
> @@ -304,7 +304,7 @@ static bool i40e_alloc_buffer_slow_zc(struct i40e_ring *rx_ring,
>         bi->addr = xdp_umem_get_data(umem, handle);
>         bi->addr += hr;
>
> -       bi->handle = handle;
> +       bi->handle = xsk_umem_adjust_offset(umem, handle, umem->headroom);
>
>         xsk_umem_discard_addr_rq(umem);
>         return true;
> @@ -469,7 +469,8 @@ void i40e_zca_free(struct zero_copy_allocator *alloc, unsigned long handle)
>         bi->addr = xdp_umem_get_data(rx_ring->xsk_umem, handle);
>         bi->addr += hr;
>
> -       bi->handle = (u64)handle;
> +       bi->handle = xsk_umem_adjust_offset(rx_ring->xsk_umem, (u64)handle,
> +                                           rx_ring->xsk_umem->headroom);
>  }
>
>  /**
> --
> 2.17.1
>
> _______________________________________________
> Intel-wired-lan mailing list
> Intel-wired-lan@osuosl.org
> https://lists.osuosl.org/mailman/listinfo/intel-wired-lan

WARNING: multiple messages have this Message-ID (diff)
From: =?unknown-8bit?q?Bj=C3=B6rn_T=C3=B6pel?= <bjorn.topel@gmail.com>
To: intel-wired-lan@osuosl.org
Subject: [Intel-wired-lan] [PATCH bpf-next] i40e: fix xdp handle calculations
Date: Thu, 5 Sep 2019 11:29:55 +0200	[thread overview]
Message-ID: <CAJ+HfNib5qSX13wquSe8WbuZ3CMQCyeS2cdhqPG7NTjqvSq2Ew@mail.gmail.com> (raw)
In-Reply-To: <20190905011144.3513-1-kevin.laatz@intel.com>

On Thu, 5 Sep 2019 at 11:27, Kevin Laatz <kevin.laatz@intel.com> wrote:
>
> Currently, we don't add headroom to the handle in i40e_zca_free,
> i40e_alloc_buffer_slow_zc and i40e_alloc_buffer_zc. The addition of the
> headroom to the handle was removed in
> commit 2f86c806a8a8 ("i40e: modify driver for handling offsets"), which
> will break things when headroom is non-zero. This patch fixes this and uses
> xsk_umem_adjust_offset to add it appropritely based on the mode being run.
>
> Fixes: 2f86c806a8a8 ("i40e: modify driver for handling offsets")
> Reported-by: Bjorn Topel <bjorn.topel@intel.com>
> Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>

Thanks Kevin!

Acked-by: Bj?rn T?pel <bjorn.topel@intel.com>

> ---
>  drivers/net/ethernet/intel/i40e/i40e_xsk.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
> index eaca6162a6e6..0373bc6c7e61 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_xsk.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
> @@ -267,7 +267,7 @@ static bool i40e_alloc_buffer_zc(struct i40e_ring *rx_ring,
>         bi->addr = xdp_umem_get_data(umem, handle);
>         bi->addr += hr;
>
> -       bi->handle = handle;
> +       bi->handle = xsk_umem_adjust_offset(umem, handle, umem->headroom);
>
>         xsk_umem_discard_addr(umem);
>         return true;
> @@ -304,7 +304,7 @@ static bool i40e_alloc_buffer_slow_zc(struct i40e_ring *rx_ring,
>         bi->addr = xdp_umem_get_data(umem, handle);
>         bi->addr += hr;
>
> -       bi->handle = handle;
> +       bi->handle = xsk_umem_adjust_offset(umem, handle, umem->headroom);
>
>         xsk_umem_discard_addr_rq(umem);
>         return true;
> @@ -469,7 +469,8 @@ void i40e_zca_free(struct zero_copy_allocator *alloc, unsigned long handle)
>         bi->addr = xdp_umem_get_data(rx_ring->xsk_umem, handle);
>         bi->addr += hr;
>
> -       bi->handle = (u64)handle;
> +       bi->handle = xsk_umem_adjust_offset(rx_ring->xsk_umem, (u64)handle,
> +                                           rx_ring->xsk_umem->headroom);
>  }
>
>  /**
> --
> 2.17.1
>
> _______________________________________________
> Intel-wired-lan mailing list
> Intel-wired-lan at osuosl.org
> https://lists.osuosl.org/mailman/listinfo/intel-wired-lan

  reply	other threads:[~2019-09-05  9:30 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-05  1:11 [PATCH bpf-next] i40e: fix xdp handle calculations Kevin Laatz
2019-09-05  1:11 ` [Intel-wired-lan] " Kevin Laatz
2019-09-05  9:29 ` Björn Töpel [this message]
2019-09-05  9:29   ` =?unknown-8bit?q?Bj=C3=B6rn_T=C3=B6pel?=
2019-09-05 13:13 ` Daniel Borkmann
2019-09-05 13:13   ` [Intel-wired-lan] " Daniel Borkmann
2019-09-17 10:48 ` Maxim Mikityanskiy
2019-09-17 10:48   ` [Intel-wired-lan] " Maxim Mikityanskiy
2019-09-17 10:54   ` Björn Töpel
2019-09-17 10:54     ` [Intel-wired-lan] " =?unknown-8bit?q?Bj=C3=B6rn_T=C3=B6pel?=

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=CAJ+HfNib5qSX13wquSe8WbuZ3CMQCyeS2cdhqPG7NTjqvSq2Ew@mail.gmail.com \
    --to=bjorn.topel@gmail.com \
    --cc=ast@kernel.org \
    --cc=bjorn.topel@intel.com \
    --cc=bpf@vger.kernel.org \
    --cc=bruce.richardson@intel.com \
    --cc=ciara.loftus@intel.com \
    --cc=daniel@iogearbox.net \
    --cc=intel-wired-lan@lists.osuosl.org \
    --cc=jonathan.lemon@gmail.com \
    --cc=kevin.laatz@intel.com \
    --cc=magnus.karlsson@intel.com \
    --cc=netdev@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.