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path: root/drivers/infiniband/hw/mlx5/ah.c
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Diffstat (limited to 'drivers/infiniband/hw/mlx5/ah.c')
-rw-r--r--drivers/infiniband/hw/mlx5/ah.c25
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mlx5/ah.c b/drivers/infiniband/hw/mlx5/ah.c
index 745efa4cfc71..d090e96f6f01 100644
--- a/drivers/infiniband/hw/mlx5/ah.c
+++ b/drivers/infiniband/hw/mlx5/ah.c
@@ -64,7 +64,9 @@ static struct ib_ah *create_ib_ah(struct mlx5_ib_dev *dev,
return &ah->ibah;
}
-struct ib_ah *mlx5_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
+struct ib_ah *mlx5_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr,
+ struct ib_udata *udata)
+
{
struct mlx5_ib_ah *ah;
struct mlx5_ib_dev *dev = to_mdev(pd->device);
@@ -75,6 +77,27 @@ struct ib_ah *mlx5_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
if (ll == IB_LINK_LAYER_ETHERNET && !(ah_attr->ah_flags & IB_AH_GRH))
return ERR_PTR(-EINVAL);
+ if (ll == IB_LINK_LAYER_ETHERNET && udata) {
+ int err;
+ struct mlx5_ib_create_ah_resp resp = {};
+ u32 min_resp_len = offsetof(typeof(resp), dmac) +
+ sizeof(resp.dmac);
+
+ if (udata->outlen < min_resp_len)
+ return ERR_PTR(-EINVAL);
+
+ resp.response_length = min_resp_len;
+
+ err = ib_resolve_eth_dmac(pd->device, ah_attr);
+ if (err)
+ return ERR_PTR(err);
+
+ memcpy(resp.dmac, ah_attr->dmac, ETH_ALEN);
+ err = ib_copy_to_udata(udata, &resp, resp.response_length);
+ if (err)
+ return ERR_PTR(err);
+ }
+
ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
if (!ah)
return ERR_PTR(-ENOMEM);
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