mlxsw: spectrum_flower: Add ability to match on port ranges

Add the ability to match on port ranges by utilizing the previously
added port range registers and the port range key element. Up to two
port range registers can be used for each filter, one for source port
and another for destination port.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Link: https://lore.kernel.org/r/df4385a9592917e9a22ebff339e0463e4a8dfa82.1689092769.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

3 files changed, 79 insertions, 1 deletions

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
index 4a1bf2d39fa0..c6231e62a371 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
@@ -867,9 +867,13 @@ struct mlxsw_sp_acl_rule_info {
 	   egress_bind_blocker:1,
 	   counter_valid:1,
 	   policer_index_valid:1,
-	   ipv6_valid:1;
+	   ipv6_valid:1,
+	   src_port_range_reg_valid:1,
+	   dst_port_range_reg_valid:1;
 	unsigned int counter_index;
 	u16 policer_index;
+	u8 src_port_range_reg_index;
+	u8 dst_port_range_reg_index;
 	struct {
 		u32 prev_val;
 		enum mlxsw_sp_acl_mangle_field prev_field;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c
index 7240b74b4883..186161a3459d 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c
@@ -344,6 +344,12 @@ void mlxsw_sp_acl_rulei_destroy(struct mlxsw_sp *mlxsw_sp,
 {
 	if (rulei->action_created)
 		mlxsw_afa_block_destroy(rulei->act_block);
+	if (rulei->src_port_range_reg_valid)
+		mlxsw_sp_port_range_reg_put(mlxsw_sp,
+					    rulei->src_port_range_reg_index);
+	if (rulei->dst_port_range_reg_valid)
+		mlxsw_sp_port_range_reg_put(mlxsw_sp,
+					    rulei->dst_port_range_reg_index);
 	kfree(rulei);
 }
 
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
index 72917f09e806..8329100479b3 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
@@ -418,6 +418,68 @@ static int mlxsw_sp_flower_parse_ports(struct mlxsw_sp *mlxsw_sp,
 	return 0;
 }
 
+static int
+mlxsw_sp_flower_parse_ports_range(struct mlxsw_sp *mlxsw_sp,
+				  struct mlxsw_sp_acl_rule_info *rulei,
+				  struct flow_cls_offload *f, u8 ip_proto)
+{
+	const struct flow_rule *rule = flow_cls_offload_flow_rule(f);
+	struct flow_match_ports_range match;
+	u32 key_mask_value = 0;
+
+	if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS_RANGE))
+		return 0;
+
+	if (ip_proto != IPPROTO_TCP && ip_proto != IPPROTO_UDP) {
+		NL_SET_ERR_MSG_MOD(f->common.extack, "Only UDP and TCP keys are supported");
+		return -EINVAL;
+	}
+
+	flow_rule_match_ports_range(rule, &match);
+
+	if (match.mask->tp_min.src) {
+		struct mlxsw_sp_port_range range = {
+			.min = ntohs(match.key->tp_min.src),
+			.max = ntohs(match.key->tp_max.src),
+			.source = true,
+		};
+		u8 prr_index;
+		int err;
+
+		err = mlxsw_sp_port_range_reg_get(mlxsw_sp, &range,
+						  f->common.extack, &prr_index);
+		if (err)
+			return err;
+
+		rulei->src_port_range_reg_index = prr_index;
+		rulei->src_port_range_reg_valid = true;
+		key_mask_value |= BIT(prr_index);
+	}
+
+	if (match.mask->tp_min.dst) {
+		struct mlxsw_sp_port_range range = {
+			.min = ntohs(match.key->tp_min.dst),
+			.max = ntohs(match.key->tp_max.dst),
+		};
+		u8 prr_index;
+		int err;
+
+		err = mlxsw_sp_port_range_reg_get(mlxsw_sp, &range,
+						  f->common.extack, &prr_index);
+		if (err)
+			return err;
+
+		rulei->dst_port_range_reg_index = prr_index;
+		rulei->dst_port_range_reg_valid = true;
+		key_mask_value |= BIT(prr_index);
+	}
+
+	mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_L4_PORT_RANGE,
+				       key_mask_value, key_mask_value);
+
+	return 0;
+}
+
 static int mlxsw_sp_flower_parse_tcp(struct mlxsw_sp *mlxsw_sp,
 				     struct mlxsw_sp_acl_rule_info *rulei,
 				     struct flow_cls_offload *f,
@@ -503,6 +565,7 @@ static int mlxsw_sp_flower_parse(struct mlxsw_sp *mlxsw_sp,
 	      BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
 	      BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
 	      BIT(FLOW_DISSECTOR_KEY_PORTS) |
+	      BIT(FLOW_DISSECTOR_KEY_PORTS_RANGE) |
 	      BIT(FLOW_DISSECTOR_KEY_TCP) |
 	      BIT(FLOW_DISSECTOR_KEY_IP) |
 	      BIT(FLOW_DISSECTOR_KEY_VLAN))) {
@@ -604,6 +667,11 @@ static int mlxsw_sp_flower_parse(struct mlxsw_sp *mlxsw_sp,
 	err = mlxsw_sp_flower_parse_ports(mlxsw_sp, rulei, f, ip_proto);
 	if (err)
 		return err;
+
+	err = mlxsw_sp_flower_parse_ports_range(mlxsw_sp, rulei, f, ip_proto);
+	if (err)
+		return err;
+
 	err = mlxsw_sp_flower_parse_tcp(mlxsw_sp, rulei, f, ip_proto);
 	if (err)
 		return err;