netdev - [PATCH net-next 2/8] ice: do Tx through PF netdev in slow-path

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Message-ID: <20240325202623.1012287-3-anthony.l.nguyen@intel.com>
Date: Mon, 25 Mar 2024 13:26:10 -0700
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	edumazet@...gle.com,
	netdev@...r.kernel.org
Cc: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>,
	anthony.l.nguyen@...el.com,
	Marcin Szycik <marcin.szycik@...ux.intel.com>,
	Sujai Buvaneswaran <sujai.buvaneswaran@...el.com>
Subject: [PATCH net-next 2/8] ice: do Tx through PF netdev in slow-path

From: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>

Tx can be done using PF netdev.

Checks before Tx are unnecessary. Checking if switchdev mode is set
seems too defensive (there is no PR netdev in legacy mode). If
corresponding VF is disabled or during reset, PR netdev also should be
down.

Reviewed-by: Marcin Szycik <marcin.szycik@...ux.intel.com>
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/ice/ice_eswitch.c | 26 +++++---------------
 drivers/net/ethernet/intel/ice/ice_repr.c    | 12 ---------
 drivers/net/ethernet/intel/ice/ice_repr.h    |  2 --
 3 files changed, 6 insertions(+), 34 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_eswitch.c b/drivers/net/ethernet/intel/ice/ice_eswitch.c
index 2e999f801c0a..8ad271534d80 100644
--- a/drivers/net/ethernet/intel/ice/ice_eswitch.c
+++ b/drivers/net/ethernet/intel/ice/ice_eswitch.c
@@ -236,7 +236,7 @@ ice_eswitch_release_repr(struct ice_pf *pf, struct ice_repr *repr)
  */
 static int ice_eswitch_setup_repr(struct ice_pf *pf, struct ice_repr *repr)
 {
-	struct ice_vsi *ctrl_vsi = pf->eswitch.control_vsi;
+	struct ice_vsi *uplink_vsi = pf->eswitch.uplink_vsi;
 	struct ice_vsi *vsi = repr->src_vsi;
 	struct metadata_dst *dst;
 
@@ -255,12 +255,11 @@ static int ice_eswitch_setup_repr(struct ice_pf *pf, struct ice_repr *repr)
 	netif_napi_add(repr->netdev, &repr->q_vector->napi,
 		       ice_napi_poll);
 
-	netif_keep_dst(repr->netdev);
+	netif_keep_dst(uplink_vsi->netdev);
 
 	dst = repr->dst;
 	dst->u.port_info.port_id = vsi->vsi_num;
-	dst->u.port_info.lower_dev = repr->netdev;
-	ice_repr_set_traffic_vsi(repr, ctrl_vsi);
+	dst->u.port_info.lower_dev = uplink_vsi->netdev;
 
 	return 0;
 
@@ -318,27 +317,14 @@ void ice_eswitch_update_repr(unsigned long repr_id, struct ice_vsi *vsi)
 netdev_tx_t
 ice_eswitch_port_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 {
-	struct ice_netdev_priv *np;
-	struct ice_repr *repr;
-	struct ice_vsi *vsi;
-
-	np = netdev_priv(netdev);
-	vsi = np->vsi;
-
-	if (!vsi || !ice_is_switchdev_running(vsi->back))
-		return NETDEV_TX_BUSY;
-
-	if (ice_is_reset_in_progress(vsi->back->state) ||
-	    test_bit(ICE_VF_DIS, vsi->back->state))
-		return NETDEV_TX_BUSY;
+	struct ice_repr *repr = ice_netdev_to_repr(netdev);
 
-	repr = ice_netdev_to_repr(netdev);
 	skb_dst_drop(skb);
 	dst_hold((struct dst_entry *)repr->dst);
 	skb_dst_set(skb, (struct dst_entry *)repr->dst);
-	skb->queue_mapping = repr->q_id;
+	skb->dev = repr->dst->u.port_info.lower_dev;
 
-	return ice_start_xmit(skb, netdev);
+	return dev_queue_xmit(skb);
 }
 
 /**
diff --git a/drivers/net/ethernet/intel/ice/ice_repr.c b/drivers/net/ethernet/intel/ice/ice_repr.c
index 5f30fb131f74..6191bee6c536 100644
--- a/drivers/net/ethernet/intel/ice/ice_repr.c
+++ b/drivers/net/ethernet/intel/ice/ice_repr.c
@@ -439,15 +439,3 @@ void ice_repr_stop_tx_queues(struct ice_repr *repr)
 	netif_carrier_off(repr->netdev);
 	netif_tx_stop_all_queues(repr->netdev);
 }
-
-/**
- * ice_repr_set_traffic_vsi - set traffic VSI for port representor
- * @repr: repr on with VSI will be set
- * @vsi: pointer to VSI that will be used by port representor to pass traffic
- */
-void ice_repr_set_traffic_vsi(struct ice_repr *repr, struct ice_vsi *vsi)
-{
-	struct ice_netdev_priv *np = netdev_priv(repr->netdev);
-
-	np->vsi = vsi;
-}
diff --git a/drivers/net/ethernet/intel/ice/ice_repr.h b/drivers/net/ethernet/intel/ice/ice_repr.h
index f9aede315716..b107e058d538 100644
--- a/drivers/net/ethernet/intel/ice/ice_repr.h
+++ b/drivers/net/ethernet/intel/ice/ice_repr.h
@@ -28,8 +28,6 @@ void ice_repr_rem_vf(struct ice_repr *repr);
 void ice_repr_start_tx_queues(struct ice_repr *repr);
 void ice_repr_stop_tx_queues(struct ice_repr *repr);
 
-void ice_repr_set_traffic_vsi(struct ice_repr *repr, struct ice_vsi *vsi);
-
 struct ice_repr *ice_netdev_to_repr(struct net_device *netdev);
 bool ice_is_port_repr_netdev(const struct net_device *netdev);
 
-- 
2.41.0