[PATCH net-next v3 6/6] net: ti: icssg-prueth: Enable HSR Tx Tag and Rx Tag offload

[MD Danish Anwar <danishanwar@ti.com>]

From: Ravi Gunasekaran <r-gunasekaran@ti.com>

Add support to offload HSR Tx Tag Insertion and Rx Tag Removal
and duplicate discard.

Duplicate discard is done as part of RX tag removal and it is
done by the firmware. When driver sends the r30 command
ICSSG_EMAC_HSR_RX_OFFLOAD_ENABLE, firmware does RX tag removal as well as
duplicate discard.

Signed-off-by: Ravi Gunasekaran <r-gunasekaran@ti.com>
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
---
 drivers/net/ethernet/ti/icssg/icssg_common.c |  3 +++
 drivers/net/ethernet/ti/icssg/icssg_config.c |  4 +++-
 drivers/net/ethernet/ti/icssg/icssg_config.h |  2 ++
 drivers/net/ethernet/ti/icssg/icssg_prueth.c | 11 ++++++++++-
 drivers/net/ethernet/ti/icssg/icssg_prueth.h |  1 +
 5 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/ti/icssg/icssg_common.c b/drivers/net/ethernet/ti/icssg/icssg_common.c
index 2d6d8648f5a9..4eae4f9250c0 100644
--- a/drivers/net/ethernet/ti/icssg/icssg_common.c
+++ b/drivers/net/ethernet/ti/icssg/icssg_common.c
@@ -721,6 +721,9 @@ enum netdev_tx icssg_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev
 	if (prueth->is_hsr_offload_mode && (ndev->features & NETIF_F_HW_HSR_DUP))
 		dst_tag_id = PRUETH_UNDIRECTED_PKT_DST_TAG;
 
+	if (prueth->is_hsr_offload_mode && (ndev->features & NETIF_F_HW_HSR_TAG_INS))
+		epib[1] |= PRUETH_UNDIRECTED_PKT_TAG_INS;
+
 	cppi5_desc_set_tags_ids(&first_desc->hdr, 0, dst_tag_id);
 	k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &buf_dma);
 	cppi5_hdesc_attach_buf(first_desc, buf_dma, pkt_len, buf_dma, pkt_len);
diff --git a/drivers/net/ethernet/ti/icssg/icssg_config.c b/drivers/net/ethernet/ti/icssg/icssg_config.c
index 7b2e6c192ff3..72ace151d8e9 100644
--- a/drivers/net/ethernet/ti/icssg/icssg_config.c
+++ b/drivers/net/ethernet/ti/icssg/icssg_config.c
@@ -531,7 +531,9 @@ static const struct icssg_r30_cmd emac_r32_bitmask[] = {
 	{{EMAC_NONE,  0xffff4000, EMAC_NONE, EMAC_NONE}},	/* Preemption on Tx ENABLE*/
 	{{EMAC_NONE,  0xbfff0000, EMAC_NONE, EMAC_NONE}},	/* Preemption on Tx DISABLE*/
 	{{0xffff0010,  EMAC_NONE, 0xffff0010, EMAC_NONE}},	/* VLAN AWARE*/
-	{{0xffef0000,  EMAC_NONE, 0xffef0000, EMAC_NONE}}	/* VLAN UNWARE*/
+	{{0xffef0000,  EMAC_NONE, 0xffef0000, EMAC_NONE}},	/* VLAN UNWARE*/
+	{{0xffff2000, EMAC_NONE, EMAC_NONE, EMAC_NONE}},	/* HSR_RX_OFFLOAD_ENABLE */
+	{{0xdfff0000, EMAC_NONE, EMAC_NONE, EMAC_NONE}}		/* HSR_RX_OFFLOAD_DISABLE */
 };
 
 int icssg_set_port_state(struct prueth_emac *emac,
diff --git a/drivers/net/ethernet/ti/icssg/icssg_config.h b/drivers/net/ethernet/ti/icssg/icssg_config.h
index 1ac60283923b..92c2deaa3068 100644
--- a/drivers/net/ethernet/ti/icssg/icssg_config.h
+++ b/drivers/net/ethernet/ti/icssg/icssg_config.h
@@ -80,6 +80,8 @@ enum icssg_port_state_cmd {
 	ICSSG_EMAC_PORT_PREMPT_TX_DISABLE,
 	ICSSG_EMAC_PORT_VLAN_AWARE_ENABLE,
 	ICSSG_EMAC_PORT_VLAN_AWARE_DISABLE,
+	ICSSG_EMAC_HSR_RX_OFFLOAD_ENABLE,
+	ICSSG_EMAC_HSR_RX_OFFLOAD_DISABLE,
 	ICSSG_EMAC_PORT_MAX_COMMANDS
 };
 
diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
index ecc342bcc1b5..c671cf9813f0 100644
--- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c
+++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
@@ -42,7 +42,9 @@
 #define DEFAULT_UNTAG_MASK	1
 
 #define NETIF_PRUETH_HSR_OFFLOAD_FEATURES	(NETIF_F_HW_HSR_FWD | \
-						 NETIF_F_HW_HSR_DUP)
+						 NETIF_F_HW_HSR_DUP | \
+						 NETIF_F_HW_HSR_TAG_INS | \
+						 NETIF_F_HW_HSR_TAG_RM)
 
 /* CTRLMMR_ICSSG_RGMII_CTRL register bits */
 #define ICSSG_CTRL_RGMII_ID_MODE                BIT(24)
@@ -1034,6 +1036,13 @@ static void icssg_change_mode(struct prueth *prueth)
 
 	for (mac = PRUETH_MAC0; mac < PRUETH_NUM_MACS; mac++) {
 		emac = prueth->emac[mac];
+		if (prueth->is_hsr_offload_mode) {
+			if (emac->ndev->features & NETIF_F_HW_HSR_TAG_RM)
+				icssg_set_port_state(emac, ICSSG_EMAC_HSR_RX_OFFLOAD_ENABLE);
+			else
+				icssg_set_port_state(emac, ICSSG_EMAC_HSR_RX_OFFLOAD_DISABLE);
+		}
+
 		if (netif_running(emac->ndev)) {
 			icssg_fdb_add_del(emac, eth_stp_addr, prueth->default_vlan,
 					  ICSSG_FDB_ENTRY_P0_MEMBERSHIP |
diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.h b/drivers/net/ethernet/ti/icssg/icssg_prueth.h
index e110a5f92684..bba6da2e6bd8 100644
--- a/drivers/net/ethernet/ti/icssg/icssg_prueth.h
+++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.h
@@ -60,6 +60,7 @@
 #define IEP_DEFAULT_CYCLE_TIME_NS	1000000	/* 1 ms */
 
 #define PRUETH_UNDIRECTED_PKT_DST_TAG	0
+#define PRUETH_UNDIRECTED_PKT_TAG_INS	BIT(30)
 
 /* Firmware status codes */
 #define ICSS_HS_FW_READY 0x55555555
-- 
2.34.1