[PATCH v3 09/16] net/ice/base: remove 255 limit on sched child nodes

[Bruce Richardson <bruce.richardson@intel.com>]

The Tx scheduler in the ice driver can be configured to have large
numbers of child nodes at a given layer, but the driver code implicitly
limited the number of nodes to 255 by using a u8 datatype for the number
of children. Increase this to a 16-bit value throughout the code.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/ice/base/ice_sched.c | 25 ++++++++++++++-----------
 drivers/net/ice/base/ice_type.h  |  2 +-
 2 files changed, 15 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ice/base/ice_sched.c b/drivers/net/ice/base/ice_sched.c
index e398984bf2..be13833e1e 100644
--- a/drivers/net/ice/base/ice_sched.c
+++ b/drivers/net/ice/base/ice_sched.c
@@ -289,7 +289,7 @@ ice_sched_get_first_node(struct ice_port_info *pi,
  */
 struct ice_sched_node *ice_sched_get_tc_node(struct ice_port_info *pi, u8 tc)
 {
-	u8 i;
+	u16 i;
 
 	if (!pi || !pi->root)
 		return NULL;
@@ -316,7 +316,7 @@ void ice_free_sched_node(struct ice_port_info *pi, struct ice_sched_node *node)
 {
 	struct ice_sched_node *parent;
 	struct ice_hw *hw = pi->hw;
-	u8 i, j;
+	u16 i, j;
 
 	/* Free the children before freeing up the parent node
 	 * The parent array is updated below and that shifts the nodes
@@ -1473,7 +1473,7 @@ bool
 ice_sched_find_node_in_subtree(struct ice_hw *hw, struct ice_sched_node *base,
 			       struct ice_sched_node *node)
 {
-	u8 i;
+	u16 i;
 
 	for (i = 0; i < base->num_children; i++) {
 		struct ice_sched_node *child = base->children[i];
@@ -1510,7 +1510,7 @@ ice_sched_get_free_qgrp(struct ice_port_info *pi,
 			struct ice_sched_node *qgrp_node, u8 owner)
 {
 	struct ice_sched_node *min_qgrp;
-	u8 min_children;
+	u16 min_children;
 
 	if (!qgrp_node)
 		return qgrp_node;
@@ -2070,7 +2070,7 @@ static void ice_sched_rm_agg_vsi_info(struct ice_port_info *pi, u16 vsi_handle)
  */
 static bool ice_sched_is_leaf_node_present(struct ice_sched_node *node)
 {
-	u8 i;
+	u16 i;
 
 	for (i = 0; i < node->num_children; i++)
 		if (ice_sched_is_leaf_node_present(node->children[i]))
@@ -2105,7 +2105,7 @@ ice_sched_rm_vsi_cfg(struct ice_port_info *pi, u16 vsi_handle, u8 owner)
 
 	ice_for_each_traffic_class(i) {
 		struct ice_sched_node *vsi_node, *tc_node;
-		u8 j = 0;
+		u16 j = 0;
 
 		tc_node = ice_sched_get_tc_node(pi, i);
 		if (!tc_node)
@@ -2173,7 +2173,7 @@ int ice_rm_vsi_lan_cfg(struct ice_port_info *pi, u16 vsi_handle)
  */
 bool ice_sched_is_tree_balanced(struct ice_hw *hw, struct ice_sched_node *node)
 {
-	u8 i;
+	u16 i;
 
 	/* start from the leaf node */
 	for (i = 0; i < node->num_children; i++)
@@ -2247,7 +2247,8 @@ ice_sched_get_free_vsi_parent(struct ice_hw *hw, struct ice_sched_node *node,
 			      u16 *num_nodes)
 {
 	u8 l = node->tx_sched_layer;
-	u8 vsil, i;
+	u8 vsil;
+	u16 i;
 
 	vsil = ice_sched_get_vsi_layer(hw);
 
@@ -2289,7 +2290,7 @@ ice_sched_update_parent(struct ice_sched_node *new_parent,
 			struct ice_sched_node *node)
 {
 	struct ice_sched_node *old_parent;
-	u8 i, j;
+	u16 i, j;
 
 	old_parent = node->parent;
 
@@ -2389,7 +2390,8 @@ ice_sched_move_vsi_to_agg(struct ice_port_info *pi, u16 vsi_handle, u32 agg_id,
 	u16 num_nodes[ICE_AQC_TOPO_MAX_LEVEL_NUM] = { 0 };
 	u32 first_node_teid, vsi_teid;
 	u16 num_nodes_added;
-	u8 aggl, vsil, i;
+	u8 aggl, vsil;
+	u16 i;
 	int status;
 
 	tc_node = ice_sched_get_tc_node(pi, tc);
@@ -2505,7 +2507,8 @@ ice_move_all_vsi_to_dflt_agg(struct ice_port_info *pi,
 static bool
 ice_sched_is_agg_inuse(struct ice_port_info *pi, struct ice_sched_node *node)
 {
-	u8 vsil, i;
+	u8 vsil;
+	u16 i;
 
 	vsil = ice_sched_get_vsi_layer(pi->hw);
 	if (node->tx_sched_layer < vsil - 1) {
diff --git a/drivers/net/ice/base/ice_type.h b/drivers/net/ice/base/ice_type.h
index a70e4a8afa..35f832eb9f 100644
--- a/drivers/net/ice/base/ice_type.h
+++ b/drivers/net/ice/base/ice_type.h
@@ -1030,9 +1030,9 @@ struct ice_sched_node {
 	struct ice_aqc_txsched_elem_data info;
 	u32 agg_id;			/* aggregator group ID */
 	u16 vsi_handle;
+	u16 num_children;
 	u8 in_use;			/* suspended or in use */
 	u8 tx_sched_layer;		/* Logical Layer (1-9) */
-	u8 num_children;
 	u8 tc_num;
 	u8 owner;
 #define ICE_SCHED_NODE_OWNER_LAN	0
-- 
2.43.0