[PATCH net-next 3/5] net: sparx5: Track shared tc blocks and per-port policer state

[Daniel Machon]

A police action on a shared tc block applies one aggregate rate to all
ports bound to the block, which a per-port policer cannot implement.
The port policer offload therefore needs to know whether the ingress
block of a port is shared.

Add struct sparx5_port_tc to each port, holding a flag that records
whether the ingress block is shared, and the state of the four policers
of the port.

Signed-off-by: Daniel Machon <daniel.machon at microchip.com>
---
 drivers/net/ethernet/microchip/sparx5/sparx5_main.h | 16 ++++++++++++++++
 drivers/net/ethernet/microchip/sparx5/sparx5_tc.c   | 14 ++++++++++++--
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_main.h b/drivers/net/ethernet/microchip/sparx5/sparx5_main.h
index 0f7d8440f614..021ac7a52034 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_main.h
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_main.h
@@ -206,6 +206,21 @@ struct sparx5_port_config {
 	u32 sd_sgpio;
 };
 
+#define SPX5_POLICERS_PER_PORT 4 /* Number of ingress port policers */
+
+struct sparx5_port_policer {
+	struct flow_stats prev;
+	struct flow_stats stats;
+	/* Port policers hold the client reference (cookie) */
+	unsigned long policer;
+};
+
+struct sparx5_port_tc {
+	/* Ingress uses a shared filter block */
+	bool ingress_block_shared;
+	struct sparx5_port_policer port_policer[SPX5_POLICERS_PER_PORT];
+};
+
 struct sparx5_port {
 	struct net_device *ndev;
 	struct sparx5 *sparx5;
@@ -229,6 +244,7 @@ struct sparx5_port {
 	enum sparx5_vlan_port_type vlan_type;
 	u32 custom_etype;
 	bool vlan_aware;
+	struct sparx5_port_tc tc;
 	struct hrtimer inj_timer;
 	/* ptp */
 	u8 ptp_cmd;
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_tc.c b/drivers/net/ethernet/microchip/sparx5/sparx5_tc.c
index 28b2514c8330..9ac99627eafc 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_tc.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_tc.c
@@ -47,7 +47,9 @@ static int sparx5_tc_block_cb_egress(enum tc_setup_type type,
 static int sparx5_tc_setup_block(struct net_device *ndev,
 				 struct flow_block_offload *fbo)
 {
+	struct sparx5_port *port = netdev_priv(ndev);
 	flow_setup_cb_t *cb;
+	int err;
 
 	if (fbo->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
 		cb = sparx5_tc_block_cb_ingress;
@@ -56,8 +58,16 @@ static int sparx5_tc_setup_block(struct net_device *ndev,
 	else
 		return -EOPNOTSUPP;
 
-	return flow_block_cb_setup_simple(fbo, &sparx5_block_cb_list,
-					  cb, ndev, ndev, false);
+	err = flow_block_cb_setup_simple(fbo, &sparx5_block_cb_list,
+					 cb, ndev, ndev, false);
+	if (err)
+		return err;
+
+	if (fbo->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
+		port->tc.ingress_block_shared =
+			fbo->command == FLOW_BLOCK_BIND && fbo->block_shared;
+
+	return 0;
 }
 
 static void sparx5_tc_get_layer_and_idx(struct sparx5 *sparx5, u32 parent,

-- 
2.34.1