From: Kevin Laatz <kevin.laatz@intel.com>
To: netdev@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net,
bjorn.topel@intel.com, magnus.karlsson@intel.com,
jonathan.lemon@gmail.com
Cc: bruce.richardson@intel.com, ciara.loftus@intel.com,
bpf@vger.kernel.org, intel-wired-lan@lists.osuosl.org,
Kevin Laatz <kevin.laatz@intel.com>
Subject: [PATCH bpf-next] ixgbe: fix xdp handle calculations
Date: Thu, 5 Sep 2019 01:12:17 +0000 [thread overview]
Message-ID: <20190905011217.3567-1-kevin.laatz@intel.com> (raw)
Currently, we don't add headroom to the handle in ixgbe_zca_free,
ixgbe_alloc_buffer_slow_zc and ixgbe_alloc_buffer_zc. The addition of the
headroom to the handle was removed in
commit d8c3061e5edd ("ixgbe: modify driver for handling offsets"), which
will break things when headroom isvnon-zero. This patch fixes this and uses
xsk_umem_adjust_offset to add it appropritely based on the mode being run.
Fixes: d8c3061e5edd ("ixgbe: modify driver for handling offsets")
Reported-by: Bjorn Topel <bjorn.topel@intel.com>
Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
---
drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
index 17061c799f72..ad802a8909e0 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
@@ -248,7 +248,8 @@ void ixgbe_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);
}
static bool ixgbe_alloc_buffer_zc(struct ixgbe_ring *rx_ring,
@@ -274,7 +275,7 @@ static bool ixgbe_alloc_buffer_zc(struct ixgbe_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;
@@ -301,7 +302,7 @@ static bool ixgbe_alloc_buffer_slow_zc(struct ixgbe_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;
--
2.17.1
next reply other threads:[~2019-09-05 9:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-05 1:12 Kevin Laatz [this message]
2019-09-05 9:30 ` [Intel-wired-lan] [PATCH bpf-next] ixgbe: fix xdp handle calculations Björn Töpel
2019-09-05 13:13 ` Daniel Borkmann
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