netdev - [iwl-next v4 13/15] ice: support subfunction devlink Tx topology

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Date: Mon,  3 Jun 2024 11:50:23 +0200
From: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
To: intel-wired-lan@...ts.osuosl.org
Cc: netdev@...r.kernel.org,
	jacob.e.keller@...el.com,
	michal.kubiak@...el.com,
	maciej.fijalkowski@...el.com,
	sridhar.samudrala@...el.com,
	przemyslaw.kitszel@...el.com,
	wojciech.drewek@...el.com,
	pio.raczynski@...il.com,
	jiri@...dia.com,
	mateusz.polchlopek@...el.com,
	shayd@...dia.com,
	kalesh-anakkur.purayil@...adcom.com,
	horms@...nel.org
Subject: [iwl-next v4 13/15] ice: support subfunction devlink Tx topology

Flow for creating Tx topology is the same as for VF port representors,
but the devlink port is stored in different place (sf->devlink_port).

When creating VF devlink lock isn't taken, when creating subfunction it
is. Setting Tx topology function needs to take this lock, check if it
was taken before to not do it twice.

Reviewed-by: Simon Horman <horms@...nel.org>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@...el.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@...el.com>
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
---
 drivers/net/ethernet/intel/ice/devlink/devlink.c     | 12 ++++++++++++
 .../net/ethernet/intel/ice/devlink/devlink_port.c    |  1 +
 drivers/net/ethernet/intel/ice/ice_repr.c            | 12 +++++++-----
 3 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/devlink/devlink.c b/drivers/net/ethernet/intel/ice/devlink/devlink.c
index 00f549daca57..d3b503f94749 100644
--- a/drivers/net/ethernet/intel/ice/devlink/devlink.c
+++ b/drivers/net/ethernet/intel/ice/devlink/devlink.c
@@ -746,6 +746,7 @@ static void ice_traverse_tx_tree(struct devlink *devlink, struct ice_sched_node
 				 struct ice_sched_node *tc_node, struct ice_pf *pf)
 {
 	struct devlink_rate *rate_node = NULL;
+	struct ice_dynamic_port *sf;
 	struct ice_vf *vf;
 	int i;
 
@@ -757,6 +758,7 @@ static void ice_traverse_tx_tree(struct devlink *devlink, struct ice_sched_node
 		/* create root node */
 		rate_node = devl_rate_node_create(devlink, node, node->name, NULL);
 	} else if (node->vsi_handle &&
+		   pf->vsi[node->vsi_handle]->type == ICE_VSI_VF &&
 		   pf->vsi[node->vsi_handle]->vf) {
 		vf = pf->vsi[node->vsi_handle]->vf;
 		if (!vf->devlink_port.devlink_rate)
@@ -765,6 +767,16 @@ static void ice_traverse_tx_tree(struct devlink *devlink, struct ice_sched_node
 			 */
 			devl_rate_leaf_create(&vf->devlink_port, node,
 					      node->parent->rate_node);
+	} else if (node->vsi_handle &&
+		   pf->vsi[node->vsi_handle]->type == ICE_VSI_SF &&
+		   pf->vsi[node->vsi_handle]->sf) {
+		sf = pf->vsi[node->vsi_handle]->sf;
+		if (!sf->devlink_port.devlink_rate)
+			/* leaf nodes doesn't have children
+			 * so we don't set rate_node
+			 */
+			devl_rate_leaf_create(&sf->devlink_port, node,
+					      node->parent->rate_node);
 	} else if (node->info.data.elem_type != ICE_AQC_ELEM_TYPE_LEAF &&
 		   node->parent->rate_node) {
 		rate_node = devl_rate_node_create(devlink, node, node->name,
diff --git a/drivers/net/ethernet/intel/ice/devlink/devlink_port.c b/drivers/net/ethernet/intel/ice/devlink/devlink_port.c
index fb3ff68e0666..4cfd90581d92 100644
--- a/drivers/net/ethernet/intel/ice/devlink/devlink_port.c
+++ b/drivers/net/ethernet/intel/ice/devlink/devlink_port.c
@@ -711,6 +711,7 @@ int ice_devlink_create_sf_port(struct ice_dynamic_port *dyn_port)
  */
 void ice_devlink_destroy_sf_port(struct ice_dynamic_port *dyn_port)
 {
+	devl_rate_leaf_destroy(&dyn_port->devlink_port);
 	devl_port_unregister(&dyn_port->devlink_port);
 }
 
diff --git a/drivers/net/ethernet/intel/ice/ice_repr.c b/drivers/net/ethernet/intel/ice/ice_repr.c
index 78abfdf5d47b..00d4a9125dfa 100644
--- a/drivers/net/ethernet/intel/ice/ice_repr.c
+++ b/drivers/net/ethernet/intel/ice/ice_repr.c
@@ -347,16 +347,13 @@ static void ice_repr_rem_sf(struct ice_repr *repr)
 	ice_devlink_destroy_sf_port(repr->sf);
 }
 
-static void ice_repr_set_tx_topology(struct ice_pf *pf)
+static void ice_repr_set_tx_topology(struct ice_pf *pf, struct devlink *devlink)
 {
-	struct devlink *devlink;
-
 	/* only export if ADQ and DCB disabled and eswitch enabled*/
 	if (ice_is_adq_active(pf) || ice_is_dcb_active(pf) ||
 	    !ice_is_switchdev_running(pf))
 		return;
 
-	devlink = priv_to_devlink(pf);
 	ice_devlink_rate_init_tx_topology(devlink, ice_get_main_vsi(pf));
 }
 
@@ -408,6 +405,7 @@ static struct ice_repr *ice_repr_create(struct ice_vsi *src_vsi)
 static int ice_repr_add_vf(struct ice_repr *repr)
 {
 	struct ice_vf *vf = repr->vf;
+	struct devlink *devlink;
 	int err;
 
 	err = ice_devlink_create_vf_port(vf);
@@ -424,7 +422,9 @@ static int ice_repr_add_vf(struct ice_repr *repr)
 		goto err_cfg_vsi;
 
 	ice_virtchnl_set_repr_ops(vf);
-	ice_repr_set_tx_topology(vf->pf);
+
+	devlink = priv_to_devlink(vf->pf);
+	ice_repr_set_tx_topology(vf->pf, devlink);
 
 	return 0;
 
@@ -480,6 +480,8 @@ static int ice_repr_add_sf(struct ice_repr *repr)
 	if (err)
 		goto err_netdev;
 
+	ice_repr_set_tx_topology(sf->vsi->back, priv_to_devlink(sf->vsi->back));
+
 	return 0;
 
 err_netdev:
-- 
2.42.0