idpf: set scheduling mode for completion queue

The HW must be programmed differently for queue-based scheduling mode.
To program the completion queue context correctly, the control plane
must know the scheduling mode not only for the Tx queue, but also for
the completion queue.
Unfortunately, currently the driver sets the scheduling mode only for
the Tx queues.

Propagate the scheduling mode data for the completion queue as
well when sending the queue configuration messages.

Fixes: 1c325aa ("idpf: configure resources for TX queues")
Reviewed-by: Alexander Lobakin <[email protected]>
Signed-off-by: Michal Kubiak <[email protected]>
Reviewed-by: Alan Brady <[email protected]>
Reviewed-by: Przemek Kitszel <[email protected]>
Tested-by: Krishneil Singh  <[email protected]>
Signed-off-by: Jacob Keller <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: michalQb

drivers/net/ethernet/intel/idpf/idpf_txrx.c

@@ -1160,13 +1160,17 @@ static void idpf_rxq_set_descids(struct idpf_vport *vport, struct idpf_queue *q)
  */
 static int idpf_txq_group_alloc(struct idpf_vport *vport, u16 num_txq)
 {
+	bool flow_sch_en;
 	int err, i;
 
 	vport->txq_grps = kcalloc(vport->num_txq_grp,
 				  sizeof(*vport->txq_grps), GFP_KERNEL);
 	if (!vport->txq_grps)
 		return -ENOMEM;
 
+	flow_sch_en = !idpf_is_cap_ena(vport->adapter, IDPF_OTHER_CAPS,
+				       VIRTCHNL2_CAP_SPLITQ_QSCHED);
+
 	for (i = 0; i < vport->num_txq_grp; i++) {
 		struct idpf_txq_group *tx_qgrp = &vport->txq_grps[i];
 		struct idpf_adapter *adapter = vport->adapter;
@@ -1195,8 +1199,7 @@ static int idpf_txq_group_alloc(struct idpf_vport *vport, u16 num_txq)
 			q->txq_grp = tx_qgrp;
 			hash_init(q->sched_buf_hash);
 
-			if (!idpf_is_cap_ena(adapter, IDPF_OTHER_CAPS,
-					     VIRTCHNL2_CAP_SPLITQ_QSCHED))
+			if (flow_sch_en)
 				set_bit(__IDPF_Q_FLOW_SCH_EN, q->flags);
 		}
 
@@ -1215,6 +1218,9 @@ static int idpf_txq_group_alloc(struct idpf_vport *vport, u16 num_txq)
 		tx_qgrp->complq->desc_count = vport->complq_desc_count;
 		tx_qgrp->complq->vport = vport;
 		tx_qgrp->complq->txq_grp = tx_qgrp;
+
+		if (flow_sch_en)
+			__set_bit(__IDPF_Q_FLOW_SCH_EN, tx_qgrp->complq->flags);
 	}
 
 	return 0;

drivers/net/ethernet/intel/idpf/idpf_virtchnl.c

@@ -1473,7 +1473,7 @@ static int idpf_send_config_tx_queues_msg(struct idpf_vport *vport)
 	/* Populate the queue info buffer with all queue context info */
 	for (i = 0; i < vport->num_txq_grp; i++) {
 		struct idpf_txq_group *tx_qgrp = &vport->txq_grps[i];
-		int j;
+		int j, sched_mode;
 
 		for (j = 0; j < tx_qgrp->num_txq; j++, k++) {
 			qi[k].queue_id =
@@ -1514,6 +1514,12 @@ static int idpf_send_config_tx_queues_msg(struct idpf_vport *vport)
 		qi[k].ring_len = cpu_to_le16(tx_qgrp->complq->desc_count);
 		qi[k].dma_ring_addr = cpu_to_le64(tx_qgrp->complq->dma);
 
+		if (test_bit(__IDPF_Q_FLOW_SCH_EN, tx_qgrp->complq->flags))
+			sched_mode = VIRTCHNL2_TXQ_SCHED_MODE_FLOW;
+		else
+			sched_mode = VIRTCHNL2_TXQ_SCHED_MODE_QUEUE;
+		qi[k].sched_mode = cpu_to_le16(sched_mode);
+
 		k++;
 	}