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i40e: fix xdp handle calculations

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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 2f86c806a8 ("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: 2f86c806a8 ("i40e: 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 01:11:44 +00:00 committed by Daniel Borkmann
parent 110509df45
commit 4c5d9a7fa1
1 changed files with 4 additions and 3 deletions
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7
drivers/net/ethernet/intel/i40e/i40e_xsk.c
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@ -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);
}
/**