From: Anatolii Gerasymenko anatolii.gerasymenko@intel.com
[ Upstream commit 05ef6813b234db3196f083b91db3963f040b65bb ]
Disable check for queue being enabled in ice_vc_dis_qs_msg, because there could be a case when queues were created, but were not enabled. We still need to delete those queues.
Normal workflow for VF looks like: Enable path: VIRTCHNL_OP_ADD_ETH_ADDR (opcode 10) VIRTCHNL_OP_CONFIG_VSI_QUEUES (opcode 6) VIRTCHNL_OP_ENABLE_QUEUES (opcode 8)
Disable path: VIRTCHNL_OP_DISABLE_QUEUES (opcode 9) VIRTCHNL_OP_DEL_ETH_ADDR (opcode 11)
The issue appears only in stress conditions when VF is enabled and disabled very fast. Eventually there will be a case, when queues are created by VIRTCHNL_OP_CONFIG_VSI_QUEUES, but are not enabled by VIRTCHNL_OP_ENABLE_QUEUES. In turn, these queues are not deleted by VIRTCHNL_OP_DISABLE_QUEUES, because there is a check whether queues are enabled in ice_vc_dis_qs_msg.
When we bring up the VF again, we will see the "Failed to set LAN Tx queue context" error during VIRTCHNL_OP_CONFIG_VSI_QUEUES step. This happens because old 16 queues were not deleted and VF requests to create 16 more, but ice_sched_get_free_qparent in ice_ena_vsi_txq would fail to find a parent node for first newly requested queue (because all nodes are allocated to 16 old queues).
Testing Hints:
Just enable and disable VF fast enough, so it would be disabled before reaching VIRTCHNL_OP_ENABLE_QUEUES.
while true; do ip link set dev ens785f0v0 up sleep 0.065 # adjust delay value for you machine ip link set dev ens785f0v0 down done
Fixes: 77ca27c41705 ("ice: add support for virtchnl_queue_select.[tx|rx]_queues bitmap") Signed-off-by: Anatolii Gerasymenko anatolii.gerasymenko@intel.com Tested-by: Konrad Jankowski konrad0.jankowski@intel.com Signed-off-by: Alice Michael alice.michael@intel.com Signed-off-by: Tony Nguyen anthony.l.nguyen@intel.com Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c index 1be3cd4b2bef..2bee8f10ad89 100644 --- a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c @@ -3351,9 +3351,9 @@ static int ice_vc_dis_qs_msg(struct ice_vf *vf, u8 *msg) goto error_param; }
- /* Skip queue if not enabled */ if (!test_bit(vf_q_id, vf->txq_ena)) - continue; + dev_dbg(ice_pf_to_dev(vsi->back), "Queue %u on VSI %u is not enabled, but stopping it anyway\n", + vf_q_id, vsi->vsi_num);
ice_fill_txq_meta(vsi, ring, &txq_meta);