[PATCH net-next v3] net/mlx5e: link NAPI instances to queues and IRQs

[Joe Damato <jdamato@fastly.com>]

Make mlx5 compatible with the newly added netlink queue GET APIs.

Signed-off-by: Joe Damato <jdamato@fastly.com>
---
v2 -> v3:
  - Fix commit message subject
  - call netif_queue_set_napi in mlx5e_ptp_activate_channel and
    mlx5e_ptp_deactivate_channel to enable/disable NETDEV_QUEUE_TYPE_RX for
    the PTP channel.
  - Modify mlx5e_activate_txqsq and mlx5e_deactivate_txqsq to set
    NETDEV_QUEUE_TYPE_TX which should take care of all TX queues including
    QoS/HTB and PTP.
  - Rearrange mlx5e_activate_channel and mlx5e_deactivate_channel for
    better ordering when setting and unsetting NETDEV_QUEUE_TYPE_RX NAPI
    structs

v1 -> v2:
  - Move netlink NULL code to mlx5e_deactivate_channel
  - Move netif_napi_set_irq to mlx5e_open_channel and avoid storing the
    irq, after netif_napi_add which itself sets the IRQ to -1

 drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c  | 3 +++
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 7 +++++++
 2 files changed, 10 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c b/drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c
index 078f56a3cbb2..fbbc287d924d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c
@@ -927,6 +927,8 @@ void mlx5e_ptp_activate_channel(struct mlx5e_ptp *c)
 	int tc;
 
 	napi_enable(&c->napi);
+	netif_queue_set_napi(c->netdev, c->rq.ix, NETDEV_QUEUE_TYPE_RX,
+			     &c->napi);
 
 	if (test_bit(MLX5E_PTP_STATE_TX, c->state)) {
 		for (tc = 0; tc < c->num_tc; tc++)
@@ -951,6 +953,7 @@ void mlx5e_ptp_deactivate_channel(struct mlx5e_ptp *c)
 			mlx5e_deactivate_txqsq(&c->ptpsq[tc].txqsq);
 	}
 
+	netif_queue_set_napi(c->netdev, c->rq.ix, NETDEV_QUEUE_TYPE_RX, NULL);
 	napi_disable(&c->napi);
 }
 
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index c8e8f512803e..2f1792854dd5 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -1806,6 +1806,7 @@ void mlx5e_activate_txqsq(struct mlx5e_txqsq *sq)
 	set_bit(MLX5E_SQ_STATE_ENABLED, &sq->state);
 	netdev_tx_reset_queue(sq->txq);
 	netif_tx_start_queue(sq->txq);
+	netif_queue_set_napi(sq->channel->netdev, sq->txq_ix, NETDEV_QUEUE_TYPE_TX, &sq->channel->napi);
 }
 
 void mlx5e_tx_disable_queue(struct netdev_queue *txq)
@@ -1819,6 +1820,7 @@ void mlx5e_deactivate_txqsq(struct mlx5e_txqsq *sq)
 {
 	struct mlx5_wq_cyc *wq = &sq->wq;
 
+	netif_queue_set_napi(sq->channel->netdev, sq->txq_ix, NETDEV_QUEUE_TYPE_TX, NULL);
 	clear_bit(MLX5E_SQ_STATE_ENABLED, &sq->state);
 	synchronize_net(); /* Sync with NAPI to prevent netif_tx_wake_queue. */
 
@@ -2560,6 +2562,7 @@ static int mlx5e_open_channel(struct mlx5e_priv *priv, int ix,
 	c->lag_port = mlx5e_enumerate_lag_port(priv->mdev, ix);
 
 	netif_napi_add(netdev, &c->napi, mlx5e_napi_poll);
+	netif_napi_set_irq(&c->napi, irq);
 
 	err = mlx5e_open_queues(c, params, cparam);
 	if (unlikely(err))
@@ -2602,12 +2605,16 @@ static void mlx5e_activate_channel(struct mlx5e_channel *c)
 		mlx5e_activate_xsk(c);
 	else
 		mlx5e_activate_rq(&c->rq);
+
+	netif_queue_set_napi(c->netdev, c->ix, NETDEV_QUEUE_TYPE_RX, &c->napi);
 }
 
 static void mlx5e_deactivate_channel(struct mlx5e_channel *c)
 {
 	int tc;
 
+	netif_queue_set_napi(c->netdev, c->ix, NETDEV_QUEUE_TYPE_RX, NULL);
+
 	if (test_bit(MLX5E_CHANNEL_STATE_XSK, c->state))
 		mlx5e_deactivate_xsk(c);
 	else
-- 
2.25.1