octeontx2-pf: TC_MATCHALL ingress ratelimiting offload

Add TC_MATCHALL ingress ratelimiting offload support with POLICE
action for entire traffic coming into the interface.

Eg: To ratelimit ingress traffic to 100Mbps

$ ethtool -K eth0 hw-tc-offload on
$ tc qdisc add dev eth0 clsact
$ tc filter add dev eth0 ingress matchall skip_sw \
                action police rate 100Mbit burst 32Kbit

To support this, a leaf level bandwidth profile is allocated and all
RQs' contexts used by this interface are updated to point to it.
And the leaf level bandwidth profile is configured with user specified
rate and burst sizes.

Co-developed-by: Subbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 84 insertions, 0 deletions

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
index 26712c091c63..5767fa4ef205 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
@@ -15,6 +15,7 @@
 #include <net/tc_act/tc_vlan.h>
 #include <net/ipv6.h>
 
+#include "cn10k.h"
 #include "otx2_common.h"
 
 /* Egress rate limiting definitions */
@@ -675,6 +676,87 @@ static int otx2_setup_tc_cls_flower(struct otx2_nic *nic,
 	}
 }
 
+static int otx2_tc_ingress_matchall_install(struct otx2_nic *nic,
+					    struct tc_cls_matchall_offload *cls)
+{
+	struct netlink_ext_ack *extack = cls->common.extack;
+	struct flow_action *actions = &cls->rule->action;
+	struct flow_action_entry *entry;
+	u64 rate;
+	int err;
+
+	err = otx2_tc_validate_flow(nic, actions, extack);
+	if (err)
+		return err;
+
+	if (nic->flags & OTX2_FLAG_TC_MATCHALL_INGRESS_ENABLED) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Only one ingress MATCHALL ratelimitter can be offloaded");
+		return -ENOMEM;
+	}
+
+	entry = &cls->rule->action.entries[0];
+	switch (entry->id) {
+	case FLOW_ACTION_POLICE:
+		/* Ingress ratelimiting is not supported on OcteonTx2 */
+		if (is_dev_otx2(nic->pdev)) {
+			NL_SET_ERR_MSG_MOD(extack,
+					   "Ingress policing not supported on this platform");
+			return -EOPNOTSUPP;
+		}
+
+		err = cn10k_alloc_matchall_ipolicer(nic);
+		if (err)
+			return err;
+
+		/* Convert to bits per second */
+		rate = entry->police.rate_bytes_ps * 8;
+		err = cn10k_set_matchall_ipolicer_rate(nic, entry->police.burst, rate);
+		if (err)
+			return err;
+		nic->flags |= OTX2_FLAG_TC_MATCHALL_INGRESS_ENABLED;
+		break;
+	default:
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Only police action supported with Ingress MATCHALL offload");
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+static int otx2_tc_ingress_matchall_delete(struct otx2_nic *nic,
+					   struct tc_cls_matchall_offload *cls)
+{
+	struct netlink_ext_ack *extack = cls->common.extack;
+	int err;
+
+	if (nic->flags & OTX2_FLAG_INTF_DOWN) {
+		NL_SET_ERR_MSG_MOD(extack, "Interface not initialized");
+		return -EINVAL;
+	}
+
+	err = cn10k_free_matchall_ipolicer(nic);
+	nic->flags &= ~OTX2_FLAG_TC_MATCHALL_INGRESS_ENABLED;
+	return err;
+}
+
+static int otx2_setup_tc_ingress_matchall(struct otx2_nic *nic,
+					  struct tc_cls_matchall_offload *cls_matchall)
+{
+	switch (cls_matchall->command) {
+	case TC_CLSMATCHALL_REPLACE:
+		return otx2_tc_ingress_matchall_install(nic, cls_matchall);
+	case TC_CLSMATCHALL_DESTROY:
+		return otx2_tc_ingress_matchall_delete(nic, cls_matchall);
+	case TC_CLSMATCHALL_STATS:
+	default:
+		break;
+	}
+
+	return -EOPNOTSUPP;
+}
+
 static int otx2_setup_tc_block_ingress_cb(enum tc_setup_type type,
 					  void *type_data, void *cb_priv)
 {
@@ -686,6 +768,8 @@ static int otx2_setup_tc_block_ingress_cb(enum tc_setup_type type,
 	switch (type) {
 	case TC_SETUP_CLSFLOWER:
 		return otx2_setup_tc_cls_flower(nic, type_data);
+	case TC_SETUP_CLSMATCHALL:
+		return otx2_setup_tc_ingress_matchall(nic, type_data);
 	default:
 		break;
 	}