From: Guy Levi guyle@mellanox.com
[ Upstream commit 108809a0571cd1e1b317c5c083a371e163e1f8f9 ]
In the modify QP handler the base_qpn_udp field in the RSS QPC is overwrite later by irrelevant value assignment. Hence, ingress packets which gets to the RSS QP will be steered then to a garbage QPN.
The patch fixes this by skipping the above assignment when a RSS QP is modified, also, the RSS context's attributes assignments are relocated just before the context is posted to avoid future issues like this.
Additionally, this patch takes the opportunity to change the code to be disciplined to the device's manual and assigns the RSS QP context just at RESET to INIT transition.
Fixes:3078f5f1bd8b ("IB/mlx4: Add support for RSS QP") Signed-off-by: Guy Levi guyle@mellanox.com Reviewed-by: Yishai Hadas yishaih@mellanox.com Signed-off-by: Leon Romanovsky leon@kernel.org Signed-off-by: Doug Ledford dledford@redhat.com Signed-off-by: Sasha Levin alexander.levin@verizon.com --- drivers/infiniband/hw/mlx4/qp.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c index b6b33d99b0b4..26f3345948e2 100644 --- a/drivers/infiniband/hw/mlx4/qp.c +++ b/drivers/infiniband/hw/mlx4/qp.c @@ -2182,11 +2182,6 @@ static int __mlx4_ib_modify_qp(void *src, enum mlx4_ib_source_type src_type, context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) | (to_mlx4_st(dev, qp->mlx4_ib_qp_type) << 16));
- if (rwq_ind_tbl) { - fill_qp_rss_context(context, qp); - context->flags |= cpu_to_be32(1 << MLX4_RSS_QPC_FLAG_OFFSET); - } - if (!(attr_mask & IB_QP_PATH_MIG_STATE)) context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11); else { @@ -2387,6 +2382,7 @@ static int __mlx4_ib_modify_qp(void *src, enum mlx4_ib_source_type src_type, context->pd = cpu_to_be32(pd->pdn);
if (!rwq_ind_tbl) { + context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28); get_cqs(qp, src_type, &send_cq, &recv_cq); } else { /* Set dummy CQs to be compatible with HV and PRM */ send_cq = to_mcq(rwq_ind_tbl->ind_tbl[0]->cq); @@ -2394,7 +2390,6 @@ static int __mlx4_ib_modify_qp(void *src, enum mlx4_ib_source_type src_type, } context->cqn_send = cpu_to_be32(send_cq->mcq.cqn); context->cqn_recv = cpu_to_be32(recv_cq->mcq.cqn); - context->params1 = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28);
/* Set "fast registration enabled" for all kernel QPs */ if (!ibuobject) @@ -2513,7 +2508,7 @@ static int __mlx4_ib_modify_qp(void *src, enum mlx4_ib_source_type src_type, MLX4_IB_LINK_TYPE_ETH; if (dev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) { /* set QP to receive both tunneled & non-tunneled packets */ - if (!(context->flags & cpu_to_be32(1 << MLX4_RSS_QPC_FLAG_OFFSET))) + if (!rwq_ind_tbl) context->srqn = cpu_to_be32(7 << 28); } } @@ -2562,6 +2557,13 @@ static int __mlx4_ib_modify_qp(void *src, enum mlx4_ib_source_type src_type, } }
+ if (rwq_ind_tbl && + cur_state == IB_QPS_RESET && + new_state == IB_QPS_INIT) { + fill_qp_rss_context(context, qp); + context->flags |= cpu_to_be32(1 << MLX4_RSS_QPC_FLAG_OFFSET); + } + err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state), to_mlx4_state(new_state), context, optpar, sqd_event, &qp->mqp);