net/mlx5: Use flow counter IDs and not the wrapping cache object

Currently, when a flow rule is created using the FS core layer, the caller
has to pass the entire flow counter object and not just the counter HW
handle (ID). This requires both the FS core and the caller to have
knowledge about the inner implementation of the FS layer flow counters
cache and limits the possible users.

Move to use the counter ID across the place when dealing with flows.

Doing this decoupling, now can we privatize the inner implementation
of the flow counters.

Signed-off-by: Mark Bloch <markb@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/infiniband/hw/mlx5/main.c

@@ -3320,15 +3320,18 @@ static struct mlx5_ib_flow_handler *_create_flow_rule(struct mlx5_ib_dev *dev,
 	}
 
 	if (flow_act.action & MLX5_FLOW_CONTEXT_ACTION_COUNT) {
+		struct mlx5_ib_mcounters *mcounters;
+
 		err = flow_counters_set_data(flow_act.counters, ucmd);
 		if (err)
 			goto free;
 
+		mcounters = to_mcounters(flow_act.counters);
 		handler->ibcounters = flow_act.counters;
 		dest_arr[dest_num].type =
 			MLX5_FLOW_DESTINATION_TYPE_COUNTER;
-		dest_arr[dest_num].counter =
-			to_mcounters(flow_act.counters)->hw_cntrs_hndl;
+		dest_arr[dest_num].counter_id =
+			mlx5_fc_id(mcounters->hw_cntrs_hndl);
 		dest_num++;
 	}
 

drivers/net/ethernet/mellanox/mlx5/core/diag/fs_tracepoint.h

@@ -252,10 +252,10 @@ TRACE_EVENT(mlx5_fs_add_rule,
 			   memcpy(__entry->destination,
 				  &rule->dest_attr,
 				  sizeof(__entry->destination));
-			   if (rule->dest_attr.type & MLX5_FLOW_DESTINATION_TYPE_COUNTER &&
-			       rule->dest_attr.counter)
+			   if (rule->dest_attr.type &
+			       MLX5_FLOW_DESTINATION_TYPE_COUNTER)
 				__entry->counter_id =
-				rule->dest_attr.counter->id;
+					rule->dest_attr.counter_id;
 	    ),
 	    TP_printk("rule=%p fte=%p index=%u sw_action=<%s> [dst] %s\n",
 		      __entry->rule, __entry->fte, __entry->index,

drivers/net/ethernet/mellanox/mlx5/core/en_tc.c

@@ -720,7 +720,7 @@ mlx5e_tc_add_nic_flow(struct mlx5e_priv *priv,
 			goto err_fc_create;
 		}
 		dest[dest_ix].type = MLX5_FLOW_DESTINATION_TYPE_COUNTER;
-		dest[dest_ix].counter = counter;
+		dest[dest_ix].counter_id = mlx5_fc_id(counter);
 		dest_ix++;
 		attr->counter = counter;
 	}

drivers/net/ethernet/mellanox/mlx5/core/eswitch.c

@@ -1198,7 +1198,7 @@ static int esw_vport_ingress_config(struct mlx5_eswitch *esw,
 	if (counter) {
 		flow_act.action |= MLX5_FLOW_CONTEXT_ACTION_COUNT;
 		drop_ctr_dst.type = MLX5_FLOW_DESTINATION_TYPE_COUNTER;
-		drop_ctr_dst.counter = counter;
+		drop_ctr_dst.counter_id = mlx5_fc_id(counter);
 		dst = &drop_ctr_dst;
 		dest_num++;
 	}
@@ -1285,7 +1285,7 @@ static int esw_vport_egress_config(struct mlx5_eswitch *esw,
 	if (counter) {
 		flow_act.action |= MLX5_FLOW_CONTEXT_ACTION_COUNT;
 		drop_ctr_dst.type = MLX5_FLOW_DESTINATION_TYPE_COUNTER;
-		drop_ctr_dst.counter = counter;
+		drop_ctr_dst.counter_id = mlx5_fc_id(counter);
 		dst = &drop_ctr_dst;
 		dest_num++;
 	}

drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c

@@ -91,7 +91,7 @@ mlx5_eswitch_add_offloaded_rule(struct mlx5_eswitch *esw,
 	}
 	if (flow_act.action & MLX5_FLOW_CONTEXT_ACTION_COUNT) {
 		dest[i].type = MLX5_FLOW_DESTINATION_TYPE_COUNTER;
-		dest[i].counter = attr->counter;
+		dest[i].counter_id = mlx5_fc_id(attr->counter);
 		i++;
 	}
 

drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c

@@ -419,7 +419,7 @@ static int mlx5_cmd_set_fte(struct mlx5_core_dev *dev,
 				continue;
 
 			MLX5_SET(flow_counter_list, in_dests, flow_counter_id,
-				 dst->dest_attr.counter->id);
+				 dst->dest_attr.counter_id);
 			in_dests += MLX5_ST_SZ_BYTES(dest_format_struct);
 			list_size++;
 		}

drivers/net/ethernet/mellanox/mlx5/core/fs_core.c

@@ -1474,14 +1474,8 @@ static struct mlx5_flow_handle *add_rule_fg(struct mlx5_flow_group *fg,
 	return handle;
 }
 
-static bool counter_is_valid(struct mlx5_fc *counter, u32 action)
+static bool counter_is_valid(u32 action)
 {
-	if (!(action & MLX5_FLOW_CONTEXT_ACTION_COUNT))
-		return !counter;
-
-	if (!counter)
-		return false;
-
 	return (action & (MLX5_FLOW_CONTEXT_ACTION_DROP |
 			  MLX5_FLOW_CONTEXT_ACTION_FWD_DEST));
 }
@@ -1491,7 +1485,7 @@ static bool dest_is_valid(struct mlx5_flow_destination *dest,
 			  struct mlx5_flow_table *ft)
 {
 	if (dest && (dest->type == MLX5_FLOW_DESTINATION_TYPE_COUNTER))
-		return counter_is_valid(dest->counter, action);
+		return counter_is_valid(action);
 
 	if (!(action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST))
 		return true;

drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c

@@ -258,6 +258,12 @@ err_out:
 }
 EXPORT_SYMBOL(mlx5_fc_create);
 
+u32 mlx5_fc_id(struct mlx5_fc *counter)
+{
+	return counter->id;
+}
+EXPORT_SYMBOL(mlx5_fc_id);
+
 void mlx5_fc_destroy(struct mlx5_core_dev *dev, struct mlx5_fc *counter)
 {
 	struct mlx5_fc_stats *fc_stats = &dev->priv.fc_stats;

include/linux/mlx5/fs.h

@@ -92,7 +92,7 @@ struct mlx5_flow_destination {
 		u32			tir_num;
 		u32			ft_num;
 		struct mlx5_flow_table	*ft;
-		struct mlx5_fc		*counter;
+		u32			counter_id;
 		struct {
 			u16		num;
 			u16		vhca_id;
@@ -192,6 +192,7 @@ void mlx5_fc_query_cached(struct mlx5_fc *counter,
 			  u64 *bytes, u64 *packets, u64 *lastuse);
 int mlx5_fc_query(struct mlx5_core_dev *dev, struct mlx5_fc *counter,
 		  u64 *packets, u64 *bytes);
+u32 mlx5_fc_id(struct mlx5_fc *counter);
 
 int mlx5_fs_add_rx_underlay_qpn(struct mlx5_core_dev *dev, u32 underlay_qpn);
 int mlx5_fs_remove_rx_underlay_qpn(struct mlx5_core_dev *dev, u32 underlay_qpn);