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ixgbe: fix xdp handle calculations

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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 d8c3061e5e ("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: d8c3061e5e ("ixgbe: modify driver for handling offsets")
Reported-by: Bjorn Topel <bjorn.topel@intel.com>
Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Kevin Laatz 2019-09-05 01:12:17 +00:00 committed by Daniel Borkmann
parent 4c5d9a7fa1
commit 7cbbf9f1fa
1 changed files with 4 additions and 3 deletions
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7
drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
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@ -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;