ice: Update Tx scheduler tree for VSI multi-Tx queue support

This patch adds the ability for a VSI to use multiple Tx queues. More
specifically, the patch
    1) Provides the ability to update the Tx scheduler tree in the
       firmware. The driver can configure the Tx scheduler tree by
       adding/removing multiple Tx queues per TC per VSI.

    2) Allows a VSI to reconfigure its Tx queues during runtime.

    3) Synchronizes the Tx scheduler update operations using locks.

Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Tony Brelinski <tonyx.brelinski@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_common.c b/drivers/net/ethernet/intel/ice/ice_common.c
index 02d589275db0..0ab9bf66c84e 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.c
+++ b/drivers/net/ethernet/intel/ice/ice_common.c
@@ -2089,3 +2089,57 @@ ice_dis_vsi_txq(struct ice_port_info *pi, u8 num_queues, u16 *q_ids,
 	mutex_unlock(&pi->sched_lock);
 	return status;
 }
+
+/**
+ * ice_cfg_vsi_qs - configure the new/exisiting VSI queues
+ * @pi: port information structure
+ * @vsi_id: VSI Id
+ * @tc_bitmap: TC bitmap
+ * @maxqs: max queues array per TC
+ * @owner: lan or rdma
+ *
+ * This function adds/updates the VSI queues per TC.
+ */
+static enum ice_status
+ice_cfg_vsi_qs(struct ice_port_info *pi, u16 vsi_id, u8 tc_bitmap,
+	       u16 *maxqs, u8 owner)
+{
+	enum ice_status status = 0;
+	u8 i;
+
+	if (!pi || pi->port_state != ICE_SCHED_PORT_STATE_READY)
+		return ICE_ERR_CFG;
+
+	mutex_lock(&pi->sched_lock);
+
+	for (i = 0; i < ICE_MAX_TRAFFIC_CLASS; i++) {
+		/* configuration is possible only if TC node is present */
+		if (!ice_sched_get_tc_node(pi, i))
+			continue;
+
+		status = ice_sched_cfg_vsi(pi, vsi_id, i, maxqs[i], owner,
+					   ice_is_tc_ena(tc_bitmap, i));
+		if (status)
+			break;
+	}
+
+	mutex_unlock(&pi->sched_lock);
+	return status;
+}
+
+/**
+ * ice_cfg_vsi_lan - configure VSI lan queues
+ * @pi: port information structure
+ * @vsi_id: VSI Id
+ * @tc_bitmap: TC bitmap
+ * @max_lanqs: max lan queues array per TC
+ *
+ * This function adds/updates the VSI lan queues per TC.
+ */
+enum ice_status
+ice_cfg_vsi_lan(struct ice_port_info *pi, u16 vsi_id, u8 tc_bitmap,
+		u16 *max_lanqs)
+{
+	return ice_cfg_vsi_qs(pi, vsi_id, tc_bitmap, max_lanqs,
+			      ICE_SCHED_NODE_OWNER_LAN);
+}