[dpdk-dev] [PATCH v6 5/5] net/enetfec: add features

[Apeksha Gupta <apeksha.gupta@nxp.com>]

This patch adds checksum and VLAN offloads in enetfec network
poll mode driver.

Signed-off-by: Sachin Saxena <sachin.saxena@nxp.com>
Signed-off-by: Apeksha Gupta <apeksha.gupta@nxp.com>
---
 doc/guides/nics/enetfec.rst          |  2 ++
 doc/guides/nics/features/enetfec.ini |  3 ++
 drivers/net/enetfec/enet_ethdev.c    | 17 ++++++++-
 drivers/net/enetfec/enet_regs.h      | 10 ++++++
 drivers/net/enetfec/enet_rxtx.c      | 53 +++++++++++++++++++++++++++-
 5 files changed, 83 insertions(+), 2 deletions(-)

diff --git a/doc/guides/nics/enetfec.rst b/doc/guides/nics/enetfec.rst
index 47836630b6..132f0209e5 100644
--- a/doc/guides/nics/enetfec.rst
+++ b/doc/guides/nics/enetfec.rst
@@ -84,6 +84,8 @@ ENETFEC Features
 
 - Basic stats
 - Promiscuous
+- VLAN offload
+- L3/L4 checksum offload
 - Linux
 - ARMv8
 
diff --git a/doc/guides/nics/features/enetfec.ini b/doc/guides/nics/features/enetfec.ini
index 7e0fb148ac..3e9cc90b9f 100644
--- a/doc/guides/nics/features/enetfec.ini
+++ b/doc/guides/nics/features/enetfec.ini
@@ -6,6 +6,9 @@
 [Features]
 Basic stats	     = Y
 Promiscuous mode     = Y
+VLAN offload	     = Y
+L3 checksum offload  = Y
+L4 checksum offload  = Y
 Linux		     = Y
 ARMv8		     = Y
 Usage doc	     = Y
diff --git a/drivers/net/enetfec/enet_ethdev.c b/drivers/net/enetfec/enet_ethdev.c
index 4419952443..c6957e16e5 100644
--- a/drivers/net/enetfec/enet_ethdev.c
+++ b/drivers/net/enetfec/enet_ethdev.c
@@ -106,7 +106,11 @@ enetfec_restart(struct rte_eth_dev *dev)
 		val = rte_read32((uint8_t *)fep->hw_baseaddr_v + ENETFEC_RACC);
 		/* align IP header */
 		val |= ENETFEC_RACC_SHIFT16;
-		val &= ~ENETFEC_RACC_OPTIONS;
+		if (fep->flag_csum & RX_FLAG_CSUM_EN)
+			/* set RX checksum */
+			val |= ENETFEC_RACC_OPTIONS;
+		else
+			val &= ~ENETFEC_RACC_OPTIONS;
 		rte_write32(rte_cpu_to_le_32(val),
 			(uint8_t *)fep->hw_baseaddr_v + ENETFEC_RACC);
 		rte_write32(rte_cpu_to_le_32(PKT_MAX_BUF_SIZE),
@@ -611,9 +615,20 @@ static int
 enetfec_eth_init(struct rte_eth_dev *dev)
 {
 	struct enetfec_private *fep = dev->data->dev_private;
+	struct rte_eth_conf *eth_conf = &fep->dev->data->dev_conf;
+	uint64_t rx_offloads = eth_conf->rxmode.offloads;
 
 	fep->full_duplex = FULL_DUPLEX;
 	dev->dev_ops = &enetfec_ops;
+	if (fep->quirks & QUIRK_VLAN)
+		/* enable hw VLAN support */
+		rx_offloads |= DEV_RX_OFFLOAD_VLAN;
+
+	if (fep->quirks & QUIRK_CSUM) {
+		/* enable hw accelerator */
+		rx_offloads |= DEV_RX_OFFLOAD_CHECKSUM;
+		fep->flag_csum |= RX_FLAG_CSUM_EN;
+	}
 	rte_eth_dev_probing_finish(dev);
 
 	return 0;
diff --git a/drivers/net/enetfec/enet_regs.h b/drivers/net/enetfec/enet_regs.h
index 5415ed77ea..a300c6f8bc 100644
--- a/drivers/net/enetfec/enet_regs.h
+++ b/drivers/net/enetfec/enet_regs.h
@@ -27,6 +27,12 @@
 #define RX_BD_EMPTY	((ushort)0x8000) /* BD is empty */
 #define RX_BD_STATS	((ushort)0x013f) /* All buffer descriptor status bits */
 
+/* Ethernet receive use control and status of enhanced buffer descriptor */
+#define BD_ENETFEC_RX_VLAN	0x00000004
+
+#define RX_FLAG_CSUM_EN		(RX_BD_ICE | RX_BD_PCR)
+#define RX_FLAG_CSUM_ERR	(RX_BD_ICE | RX_BD_PCR)
+
 /* Ethernet transmit use control and status of buffer descriptor */
 #define TX_BD_TC	((ushort)0x0400) /* Transmit CRC */
 #define TX_BD_LAST	((ushort)0x0800) /* Last in frame */
@@ -56,6 +62,10 @@
 #define QUIRK_HAS_ENETFEC_MAC	(1 << 0)
 /* GBIT supported in controller */
 #define QUIRK_GBIT		(1 << 3)
+/* Controller support hardware checksum */
+#define QUIRK_CSUM		(1 << 5)
+/* Controller support hardware vlan */
+#define QUIRK_VLAN		(1 << 6)
 /* RACC register supported by controller */
 #define QUIRK_RACC		(1 << 12)
 /* i.MX8 ENETFEC IP version added the feature to generate the delayed TXC or
diff --git a/drivers/net/enetfec/enet_rxtx.c b/drivers/net/enetfec/enet_rxtx.c
index 445fa97e77..fdd3343589 100644
--- a/drivers/net/enetfec/enet_rxtx.c
+++ b/drivers/net/enetfec/enet_rxtx.c
@@ -245,9 +245,14 @@ enetfec_recv_pkts(void *rxq1, __rte_unused struct rte_mbuf **rx_pkts,
 	unsigned short status;
 	unsigned short pkt_len;
 	int pkt_received = 0, index = 0;
-	void *data;
+	void *data, *mbuf_data;
+	uint16_t vlan_tag;
+	struct  bufdesc_ex *ebdp = NULL;
+	bool    vlan_packet_rcvd = false;
 	struct enetfec_priv_rx_q *rxq  = (struct enetfec_priv_rx_q *)rxq1;
 	struct rte_eth_stats *stats = &rxq->fep->stats;
+	struct rte_eth_conf *eth_conf = &rxq->fep->dev->data->dev_conf;
+	uint64_t rx_offloads = eth_conf->rxmode.offloads;
 	pool = rxq->pool;
 	bdp = rxq->bd.cur;
 #if ENETFEC_LOOPBACK
@@ -302,6 +307,7 @@ enetfec_recv_pkts(void *rxq1, __rte_unused struct rte_mbuf **rx_pkts,
 		mbuf = rxq->rx_mbuf[index];
 
 		data = rte_pktmbuf_mtod(mbuf, uint8_t *);
+		mbuf_data = data;
 		rte_prefetch0(data);
 		rte_pktmbuf_append((struct rte_mbuf *)mbuf,
 				pkt_len - 4);
@@ -311,6 +317,47 @@ enetfec_recv_pkts(void *rxq1, __rte_unused struct rte_mbuf **rx_pkts,
 
 		rx_pkts[pkt_received] = mbuf;
 		pkt_received++;
+
+		/* Extract the enhanced buffer descriptor */
+		ebdp = NULL;
+		if (rxq->fep->bufdesc_ex)
+			ebdp = (struct bufdesc_ex *)bdp;
+
+		/* If this is a VLAN packet remove the VLAN Tag */
+		vlan_packet_rcvd = false;
+		if ((rx_offloads & DEV_RX_OFFLOAD_VLAN) &&
+				rxq->fep->bufdesc_ex &&
+				(rte_read32(&ebdp->bd_esc) &
+				rte_cpu_to_le_32(BD_ENETFEC_RX_VLAN))) {
+			/* Push and remove the vlan tag */
+			struct rte_vlan_hdr *vlan_header =
+				(struct rte_vlan_hdr *)
+				((uint8_t *)data + ETH_HLEN);
+			vlan_tag = rte_be_to_cpu_16(vlan_header->vlan_tci);
+
+			vlan_packet_rcvd = true;
+			memmove((uint8_t *)mbuf_data + VLAN_HLEN,
+				data, ETH_ALEN * 2);
+			rte_pktmbuf_adj(mbuf, VLAN_HLEN);
+		}
+
+		if (rxq->fep->bufdesc_ex &&
+			(rxq->fep->flag_csum & RX_FLAG_CSUM_EN)) {
+			if ((rte_read32(&ebdp->bd_esc) &
+				rte_cpu_to_le_32(RX_FLAG_CSUM_ERR)) == 0) {
+				/* don't check it */
+				mbuf->ol_flags = PKT_RX_IP_CKSUM_BAD;
+			} else {
+				mbuf->ol_flags = PKT_RX_IP_CKSUM_GOOD;
+			}
+		}
+
+		/* Handle received VLAN packets */
+		if (vlan_packet_rcvd) {
+			mbuf->vlan_tci = vlan_tag;
+			mbuf->ol_flags |= PKT_RX_VLAN_STRIPPED | PKT_RX_VLAN;
+		}
+
 		rxq->rx_mbuf[index] = new_mbuf;
 		rte_write32(rte_cpu_to_le_32(rte_pktmbuf_iova(new_mbuf)),
 				&bdp->bd_bufaddr);
@@ -411,6 +458,10 @@ enetfec_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 
 		if (txq->fep->bufdesc_ex) {
 			struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp;
+
+			if (mbuf->ol_flags == PKT_RX_IP_CKSUM_GOOD)
+				estatus |= TX_BD_PINS | TX_BD_IINS;
+
 			rte_write32(0, &ebdp->bd_bdu);
 			rte_write32(rte_cpu_to_le_32(estatus),
 				    &ebdp->bd_esc);
-- 
2.17.1