net: microchip: sparx5: Add support for IS2 VCAP rule counters

This adds API methods to set and get a rule counter.

A VCAP instance may contain the counter as part of the VCAP cache area, and
this counter may be one or more bits in width.  This type of counter
automatically increments it value when the rule is hit.

Other VCAP instances have a dedicated counter area outside of the VCAP and
in this case the rule must contain the counter id to be able to locate the
counter value.  In this case there must also be a rule action that updates
the counter using the rule id when the rule is hit.

The Sparx5 IS2 VCAP uses a dedicated counter area.

Signed-off-by: Steen Hegelund <steen.hegelund@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 45 insertions, 2 deletions

diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_vcap_impl.c b/drivers/net/ethernet/microchip/sparx5/sparx5_vcap_impl.c
index b62c48a3fc45..e8f3d030eba2 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_vcap_impl.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_vcap_impl.c
@@ -428,15 +428,58 @@ static void sparx5_vcap_cache_write(struct net_device *ndev,
 	default:
 		break;
 	}
+	if (sel & VCAP_SEL_COUNTER) {
+		start = start & 0xfff; /* counter limit */
+		if (admin->vinst == 0)
+			spx5_wr(admin->cache.counter, sparx5,
+				ANA_ACL_CNT_A(start));
+		else
+			spx5_wr(admin->cache.counter, sparx5,
+				ANA_ACL_CNT_B(start));
+		spx5_wr(admin->cache.sticky, sparx5,
+			VCAP_SUPER_VCAP_CNT_DAT(0));
+	}
 }
 
 /* API callback used for reading from the VCAP into the VCAP cache */
 static void sparx5_vcap_cache_read(struct net_device *ndev,
 				   struct vcap_admin *admin,
-				   enum vcap_selection sel, u32 start,
+				   enum vcap_selection sel,
+				   u32 start,
 				   u32 count)
 {
-	/* this will be added later */
+	struct sparx5_port *port = netdev_priv(ndev);
+	struct sparx5 *sparx5 = port->sparx5;
+	u32 *keystr, *mskstr, *actstr;
+	int idx;
+
+	keystr = &admin->cache.keystream[start];
+	mskstr = &admin->cache.maskstream[start];
+	actstr = &admin->cache.actionstream[start];
+	if (sel & VCAP_SEL_ENTRY) {
+		for (idx = 0; idx < count; ++idx) {
+			keystr[idx] = spx5_rd(sparx5,
+					      VCAP_SUPER_VCAP_ENTRY_DAT(idx));
+			mskstr[idx] = ~spx5_rd(sparx5,
+					       VCAP_SUPER_VCAP_MASK_DAT(idx));
+		}
+	}
+	if (sel & VCAP_SEL_ACTION) {
+		for (idx = 0; idx < count; ++idx)
+			actstr[idx] = spx5_rd(sparx5,
+					      VCAP_SUPER_VCAP_ACTION_DAT(idx));
+	}
+	if (sel & VCAP_SEL_COUNTER) {
+		start = start & 0xfff; /* counter limit */
+		if (admin->vinst == 0)
+			admin->cache.counter =
+				spx5_rd(sparx5, ANA_ACL_CNT_A(start));
+		else
+			admin->cache.counter =
+				spx5_rd(sparx5, ANA_ACL_CNT_B(start));
+		admin->cache.sticky =
+			spx5_rd(sparx5, VCAP_SUPER_VCAP_CNT_DAT(0));
+	}
 }
 
 /* API callback used for initializing a VCAP address range */