net: mscc: ocelot: offload egress VLAN rewriting to VCAP ES0

VCAP ES0 is an egress VCAP operating on all outgoing frames.
This patch added ES0 driver to support vlan push action of tc filter.
Usage:

tc filter add dev swp1 egress protocol 802.1Q flower indev swp0 skip_sw \
        vlan_id 1 vlan_prio 1 action vlan push id 2 priority 2

Signed-off-by: Xiaoliang Yang <xiaoliang.yang_1@nxp.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 80 insertions, 1 deletions

diff --git a/drivers/net/ethernet/mscc/ocelot_vcap.c b/drivers/net/ethernet/mscc/ocelot_vcap.c
index be3293e7c892..d0e5c5bbdbf8 100644
--- a/drivers/net/ethernet/mscc/ocelot_vcap.c
+++ b/drivers/net/ethernet/mscc/ocelot_vcap.c
@@ -774,6 +774,79 @@ static void is1_entry_set(struct ocelot *ocelot, int ix,
 	vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_WRITE, VCAP_SEL_ALL);
 }
 
+static void es0_action_set(struct ocelot *ocelot, struct vcap_data *data,
+			   const struct ocelot_vcap_filter *filter)
+{
+	const struct vcap_props *vcap = &ocelot->vcap[VCAP_ES0];
+	const struct ocelot_vcap_action *a = &filter->action;
+
+	vcap_action_set(vcap, data, VCAP_ES0_ACT_PUSH_OUTER_TAG,
+			a->push_outer_tag);
+	vcap_action_set(vcap, data, VCAP_ES0_ACT_PUSH_INNER_TAG,
+			a->push_inner_tag);
+	vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_A_TPID_SEL,
+			a->tag_a_tpid_sel);
+	vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_A_VID_SEL,
+			a->tag_a_vid_sel);
+	vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_A_PCP_SEL,
+			a->tag_a_pcp_sel);
+	vcap_action_set(vcap, data, VCAP_ES0_ACT_VID_A_VAL, a->vid_a_val);
+	vcap_action_set(vcap, data, VCAP_ES0_ACT_PCP_A_VAL, a->pcp_a_val);
+	vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_B_TPID_SEL,
+			a->tag_b_tpid_sel);
+	vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_B_VID_SEL,
+			a->tag_b_vid_sel);
+	vcap_action_set(vcap, data, VCAP_ES0_ACT_TAG_B_PCP_SEL,
+			a->tag_b_pcp_sel);
+	vcap_action_set(vcap, data, VCAP_ES0_ACT_VID_B_VAL, a->vid_b_val);
+	vcap_action_set(vcap, data, VCAP_ES0_ACT_PCP_B_VAL, a->pcp_b_val);
+}
+
+static void es0_entry_set(struct ocelot *ocelot, int ix,
+			  struct ocelot_vcap_filter *filter)
+{
+	const struct vcap_props *vcap = &ocelot->vcap[VCAP_ES0];
+	struct ocelot_vcap_key_vlan *tag = &filter->vlan;
+	struct ocelot_vcap_u64 payload;
+	struct vcap_data data;
+	int row = ix;
+
+	memset(&payload, 0, sizeof(payload));
+	memset(&data, 0, sizeof(data));
+
+	/* Read row */
+	vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_READ, VCAP_SEL_ALL);
+	vcap_cache2entry(ocelot, vcap, &data);
+	vcap_cache2action(ocelot, vcap, &data);
+
+	data.tg_sw = VCAP_TG_FULL;
+	data.type = ES0_ACTION_TYPE_NORMAL;
+	vcap_data_offset_get(vcap, &data, ix);
+	data.tg = (data.tg & ~data.tg_mask);
+	if (filter->prio != 0)
+		data.tg |= data.tg_value;
+
+	vcap_key_set(vcap, &data, VCAP_ES0_IGR_PORT, filter->ingress_port.value,
+		     filter->ingress_port.mask);
+	vcap_key_set(vcap, &data, VCAP_ES0_EGR_PORT, filter->egress_port.value,
+		     filter->egress_port.mask);
+	vcap_key_bit_set(vcap, &data, VCAP_ES0_L2_MC, filter->dmac_mc);
+	vcap_key_bit_set(vcap, &data, VCAP_ES0_L2_BC, filter->dmac_bc);
+	vcap_key_set(vcap, &data, VCAP_ES0_VID,
+		     tag->vid.value, tag->vid.mask);
+	vcap_key_set(vcap, &data, VCAP_ES0_PCP,
+		     tag->pcp.value[0], tag->pcp.mask[0]);
+
+	es0_action_set(ocelot, &data, filter);
+	vcap_data_set(data.counter, data.counter_offset,
+		      vcap->counter_width, filter->stats.pkts);
+
+	/* Write row */
+	vcap_entry2cache(ocelot, vcap, &data);
+	vcap_action2cache(ocelot, vcap, &data);
+	vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_WRITE, VCAP_SEL_ALL);
+}
+
 static void vcap_entry_get(struct ocelot *ocelot, int ix,
 			   struct ocelot_vcap_filter *filter)
 {
@@ -782,7 +855,11 @@ static void vcap_entry_get(struct ocelot *ocelot, int ix,
 	int row, count;
 	u32 cnt;
 
-	data.tg_sw = VCAP_TG_HALF;
+	if (filter->block_id == VCAP_ES0)
+		data.tg_sw = VCAP_TG_FULL;
+	else
+		data.tg_sw = VCAP_TG_HALF;
+
 	count = (1 << (data.tg_sw - 1));
 	row = (ix / count);
 	vcap_row_cmd(ocelot, vcap, row, VCAP_CMD_READ, VCAP_SEL_COUNTER);
@@ -801,6 +878,8 @@ static void vcap_entry_set(struct ocelot *ocelot, int ix,
 		return is1_entry_set(ocelot, ix, filter);
 	if (filter->block_id == VCAP_IS2)
 		return is2_entry_set(ocelot, ix, filter);
+	if (filter->block_id == VCAP_ES0)
+		return es0_entry_set(ocelot, ix, filter);
 }
 
 static int ocelot_vcap_policer_add(struct ocelot *ocelot, u32 pol_ix,