ice: Introduce new parameters in ice_sched_node

To support new devlink-rate API ice_sched_node struct needs to store
a number of additional parameters. This includes tx_max, tx_share,
tx_weight, and tx_priority.

Add new fields to ice_sched_node struct. Add new functions to configure
the hardware with new parameters. Introduce new xarray to identify
nodes uniquely.

Signed-off-by: Michal Wilczynski <michal.wilczynski@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 76 insertions, 5 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_sched.c b/drivers/net/ethernet/intel/ice/ice_sched.c
index 118595763bba..980543074ddb 100644
--- a/drivers/net/ethernet/intel/ice/ice_sched.c
+++ b/drivers/net/ethernet/intel/ice/ice_sched.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Copyright (c) 2018, Intel Corporation. */
 
+#include <net/devlink.h>
 #include "ice_sched.h"
 
 /**
@@ -355,6 +356,9 @@ void ice_free_sched_node(struct ice_port_info *pi, struct ice_sched_node *node)
 	/* leaf nodes have no children */
 	if (node->children)
 		devm_kfree(ice_hw_to_dev(hw), node->children);
+
+	kfree(node->name);
+	xa_erase(&pi->sched_node_ids, node->id);
 	devm_kfree(ice_hw_to_dev(hw), node);
 }
 
@@ -875,7 +879,7 @@ void ice_sched_cleanup_all(struct ice_hw *hw)
  *
  * This function add nodes to HW as well as to SW DB for a given layer
  */
-static int
+int
 ice_sched_add_elems(struct ice_port_info *pi, struct ice_sched_node *tc_node,
 		    struct ice_sched_node *parent, u8 layer, u16 num_nodes,
 		    u16 *num_nodes_added, u32 *first_node_teid)
@@ -940,6 +944,22 @@ ice_sched_add_elems(struct ice_port_info *pi, struct ice_sched_node *tc_node,
 
 		new_node->sibling = NULL;
 		new_node->tc_num = tc_node->tc_num;
+		new_node->tx_weight = ICE_SCHED_DFLT_BW_WT;
+		new_node->tx_share = ICE_SCHED_DFLT_BW;
+		new_node->tx_max = ICE_SCHED_DFLT_BW;
+		new_node->name = kzalloc(SCHED_NODE_NAME_MAX_LEN, GFP_KERNEL);
+		if (!new_node->name)
+			return -ENOMEM;
+
+		status = xa_alloc(&pi->sched_node_ids, &new_node->id, NULL, XA_LIMIT(0, UINT_MAX),
+				  GFP_KERNEL);
+		if (status) {
+			ice_debug(hw, ICE_DBG_SCHED, "xa_alloc failed for sched node status =%d\n",
+				  status);
+			break;
+		}
+
+		snprintf(new_node->name, SCHED_NODE_NAME_MAX_LEN, "node_%u", new_node->id);
 
 		/* add it to previous node sibling pointer */
 		/* Note: siblings are not linked across branches */
@@ -2154,7 +2174,7 @@ ice_sched_get_free_vsi_parent(struct ice_hw *hw, struct ice_sched_node *node,
  * This function removes the child from the old parent and adds it to a new
  * parent
  */
-static void
+void
 ice_sched_update_parent(struct ice_sched_node *new_parent,
 			struct ice_sched_node *node)
 {
@@ -2188,7 +2208,7 @@ ice_sched_update_parent(struct ice_sched_node *new_parent,
  *
  * This function move the child nodes to a given parent.
  */
-static int
+int
 ice_sched_move_nodes(struct ice_port_info *pi, struct ice_sched_node *parent,
 		     u16 num_items, u32 *list)
 {
@@ -3560,7 +3580,7 @@ ice_sched_set_eir_srl_excl(struct ice_port_info *pi,
  * node's RL profile ID of type CIR, EIR, or SRL, and removes old profile
  * ID from local database. The caller needs to hold scheduler lock.
  */
-static int
+int
 ice_sched_set_node_bw(struct ice_port_info *pi, struct ice_sched_node *node,
 		      enum ice_rl_type rl_type, u32 bw, u8 layer_num)
 {
@@ -3597,6 +3617,57 @@ ice_sched_set_node_bw(struct ice_port_info *pi, struct ice_sched_node *node,
 }
 
 /**
+ * ice_sched_set_node_priority - set node's priority
+ * @pi: port information structure
+ * @node: tree node
+ * @priority: number 0-7 representing priority among siblings
+ *
+ * This function sets priority of a node among it's siblings.
+ */
+int
+ice_sched_set_node_priority(struct ice_port_info *pi, struct ice_sched_node *node,
+			    u16 priority)
+{
+	struct ice_aqc_txsched_elem_data buf;
+	struct ice_aqc_txsched_elem *data;
+
+	buf = node->info;
+	data = &buf.data;
+
+	data->valid_sections |= ICE_AQC_ELEM_VALID_GENERIC;
+	data->generic |= FIELD_PREP(ICE_AQC_ELEM_GENERIC_PRIO_M, priority);
+
+	return ice_sched_update_elem(pi->hw, node, &buf);
+}
+
+/**
+ * ice_sched_set_node_weight - set node's weight
+ * @pi: port information structure
+ * @node: tree node
+ * @weight: number 1-200 representing weight for WFQ
+ *
+ * This function sets weight of the node for WFQ algorithm.
+ */
+int
+ice_sched_set_node_weight(struct ice_port_info *pi, struct ice_sched_node *node, u16 weight)
+{
+	struct ice_aqc_txsched_elem_data buf;
+	struct ice_aqc_txsched_elem *data;
+
+	buf = node->info;
+	data = &buf.data;
+
+	data->valid_sections = ICE_AQC_ELEM_VALID_CIR | ICE_AQC_ELEM_VALID_EIR |
+			       ICE_AQC_ELEM_VALID_GENERIC;
+	data->cir_bw.bw_alloc = cpu_to_le16(weight);
+	data->eir_bw.bw_alloc = cpu_to_le16(weight);
+
+	data->generic |= FIELD_PREP(ICE_AQC_ELEM_GENERIC_SP_M, 0x0);
+
+	return ice_sched_update_elem(pi->hw, node, &buf);
+}
+
+/**
  * ice_sched_set_node_bw_lmt - set node's BW limit
  * @pi: port information structure
  * @node: tree node
@@ -3606,7 +3677,7 @@ ice_sched_set_node_bw(struct ice_port_info *pi, struct ice_sched_node *node,
  * It updates node's BW limit parameters like BW RL profile ID of type CIR,
  * EIR, or SRL. The caller needs to hold scheduler lock.
  */
-static int
+int
 ice_sched_set_node_bw_lmt(struct ice_port_info *pi, struct ice_sched_node *node,
 			  enum ice_rl_type rl_type, u32 bw)
 {