netdev - [net-next PATCH v1 2/9] ice: Add support in the driver for associating napi with queue[s]

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Date: Fri, 28 Jul 2023 17:47:02 -0700
From: Amritha Nambiar <amritha.nambiar@...el.com>
To: netdev@...r.kernel.org, kuba@...nel.org, davem@...emloft.net
Cc: sridhar.samudrala@...el.com, amritha.nambiar@...el.com
Subject: [net-next PATCH v1 2/9] ice: Add support in the driver for
 associating napi with queue[s]

After the napi context is initialized, map the napi instance
with the queue/queue-set on the corresponding irq line.

Signed-off-by: Amritha Nambiar <amritha.nambiar@...el.com>
---
 drivers/net/ethernet/intel/ice/ice_lib.c  |   57 +++++++++++++++++++++++++++++
 drivers/net/ethernet/intel/ice/ice_lib.h  |    4 ++
 drivers/net/ethernet/intel/ice/ice_main.c |    4 ++
 3 files changed, 64 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index 077f2e91ae1a..171177db8fb4 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -2464,6 +2464,12 @@ ice_vsi_cfg_def(struct ice_vsi *vsi, struct ice_vsi_cfg_params *params)
 			goto unroll_vector_base;
 
 		ice_vsi_map_rings_to_vectors(vsi);
+
+		/* Associate q_vector rings to napi */
+		ret = ice_vsi_add_napi_queues(vsi);
+		if (ret)
+			goto unroll_vector_base;
+
 		vsi->stat_offsets_loaded = false;
 
 		if (ice_is_xdp_ena_vsi(vsi)) {
@@ -2943,6 +2949,57 @@ void ice_vsi_dis_irq(struct ice_vsi *vsi)
 		synchronize_irq(vsi->q_vectors[i]->irq.virq);
 }
 
+/**
+ * ice_q_vector_add_napi_queues - Add queue[s] associated with the napi
+ * @q_vector: q_vector pointer
+ *
+ * Associate the q_vector napi with all the queue[s] on the vector
+ * Returns 0 on success or < 0 on error
+ */
+int ice_q_vector_add_napi_queues(struct ice_q_vector *q_vector)
+{
+	struct ice_rx_ring *rx_ring;
+	struct ice_tx_ring *tx_ring;
+	int ret;
+
+	ice_for_each_rx_ring(rx_ring, q_vector->rx) {
+		ret = netif_napi_add_queue(&q_vector->napi, rx_ring->q_index,
+					   NAPI_QUEUE_RX);
+		if (ret)
+			return ret;
+	}
+	ice_for_each_tx_ring(tx_ring, q_vector->tx) {
+		ret = netif_napi_add_queue(&q_vector->napi, tx_ring->q_index,
+					   NAPI_QUEUE_TX);
+		if (ret)
+			return ret;
+	}
+
+	return ret;
+}
+
+/**
+ * ice_vsi_add_napi_queues
+ * @vsi: VSI pointer
+ *
+ * Associate queue[s] with napi for all vectors
+ * Returns 0 on success or < 0 on error
+ */
+int ice_vsi_add_napi_queues(struct ice_vsi *vsi)
+{
+	int i, ret = 0;
+
+	if (!vsi->netdev)
+		return ret;
+
+	ice_for_each_q_vector(vsi, i) {
+		ret = ice_q_vector_add_napi_queues(vsi->q_vectors[i]);
+		if (ret)
+			return ret;
+	}
+	return ret;
+}
+
 /**
  * ice_napi_del - Remove NAPI handler for the VSI
  * @vsi: VSI for which NAPI handler is to be removed
diff --git a/drivers/net/ethernet/intel/ice/ice_lib.h b/drivers/net/ethernet/intel/ice/ice_lib.h
index dd53fe968ad8..26c427cddf63 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.h
+++ b/drivers/net/ethernet/intel/ice/ice_lib.h
@@ -93,6 +93,10 @@ void ice_vsi_cfg_netdev_tc(struct ice_vsi *vsi, u8 ena_tc);
 struct ice_vsi *
 ice_vsi_setup(struct ice_pf *pf, struct ice_vsi_cfg_params *params);
 
+int ice_q_vector_add_napi_queues(struct ice_q_vector *q_vector);
+
+int ice_vsi_add_napi_queues(struct ice_vsi *vsi);
+
 void ice_napi_del(struct ice_vsi *vsi);
 
 int ice_vsi_release(struct ice_vsi *vsi);
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 20d5ed572a8c..d3a2fc20157c 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -3373,9 +3373,11 @@ static void ice_napi_add(struct ice_vsi *vsi)
 	if (!vsi->netdev)
 		return;
 
-	ice_for_each_q_vector(vsi, v_idx)
+	ice_for_each_q_vector(vsi, v_idx) {
 		netif_napi_add(vsi->netdev, &vsi->q_vectors[v_idx]->napi,
 			       ice_napi_poll);
+		ice_q_vector_add_napi_queues(vsi->q_vectors[v_idx]);
+	}
 }
 
 /**