Merge branch 'qlcnic-next'

Shahed Shaikh says:

====================
This patch series containes following changes -

* TSO over IPv4 and IPv6, Tx checksum offload for VXLAN
* Rx checksum offload for VXLAN and support for .ndo_{add|del}_vxlan_port
  netdev ops.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qlcnic/qlcnic.h

@@ -38,8 +38,8 @@
 
 #define _QLCNIC_LINUX_MAJOR 5
 #define _QLCNIC_LINUX_MINOR 3
-#define _QLCNIC_LINUX_SUBVERSION 56
-#define QLCNIC_LINUX_VERSIONID  "5.3.56"
+#define _QLCNIC_LINUX_SUBVERSION 57
+#define QLCNIC_LINUX_VERSIONID  "5.3.57"
 #define QLCNIC_DRV_IDC_VER  0x01
 #define QLCNIC_DRIVER_VERSION  ((_QLCNIC_LINUX_MAJOR << 16) |\
 		 (_QLCNIC_LINUX_MINOR << 8) | (_QLCNIC_LINUX_SUBVERSION))
@@ -169,11 +169,20 @@ struct cmd_desc_type0 {
 
 	__le64 addr_buffer2;
 
-	__le16 reference_handle;
+	__le16 encap_descr;	/* 15:10 offset of outer L3 header,
+				 * 9:6 number of 32bit words in outer L3 header,
+				 * 5 offload outer L4 checksum,
+				 * 4 offload outer L3 checksum,
+				 * 3 Inner L4 type, TCP=0, UDP=1,
+				 * 2 Inner L3 type, IPv4=0, IPv6=1,
+				 * 1 Outer L3 type,IPv4=0, IPv6=1,
+				 * 0 type of encapsulation, GRE=0, VXLAN=1
+				 */
 	__le16 mss;
 	u8 port_ctxid;		/* 7:4 ctxid 3:0 port */
-	u8 total_hdr_length;	/* LSO only : MAC+IP+TCP Hdr size */
-	__le16 conn_id;		/* IPSec offoad only */
+	u8 hdr_length;		/* LSO only : MAC+IP+TCP Hdr size */
+	u8 outer_hdr_length;	/* Encapsulation only */
+	u8 rsvd1;
 
 	__le64 addr_buffer3;
 	__le64 addr_buffer1;
@@ -183,7 +192,9 @@ struct cmd_desc_type0 {
 	__le64 addr_buffer4;
 
 	u8 eth_addr[ETH_ALEN];
-	__le16 vlan_TCI;
+	__le16 vlan_TCI;	/* In case of  encapsulation,
+				 * this is for outer VLAN
+				 */
 
 } __attribute__ ((aligned(64)));
 
@@ -524,6 +535,7 @@ struct qlcnic_hardware_context {
 	u8 extend_lb_time;
 	u8 phys_port_id[ETH_ALEN];
 	u8 lb_mode;
+	u16 vxlan_port;
 };
 
 struct qlcnic_adapter_stats {
@@ -538,6 +550,9 @@ struct qlcnic_adapter_stats {
 	u64  txbytes;
 	u64  lrobytes;
 	u64  lso_frames;
+	u64  encap_lso_frames;
+	u64  encap_tx_csummed;
+	u64  encap_rx_csummed;
 	u64  xmit_on;
 	u64  xmit_off;
 	u64  skb_alloc_failure;
@@ -899,6 +914,10 @@ struct qlcnic_mac_vlan_list {
 #define QLCNIC_FW_CAPABILITY_2_BEACON		BIT_7
 #define QLCNIC_FW_CAPABILITY_2_PER_PORT_ESWITCH_CFG	BIT_9
 
+#define QLCNIC_83XX_FW_CAPAB_ENCAP_RX_OFFLOAD	BIT_0
+#define QLCNIC_83XX_FW_CAPAB_ENCAP_TX_OFFLOAD	BIT_1
+#define QLCNIC_83XX_FW_CAPAB_ENCAP_CKO_OFFLOAD	BIT_4
+
 /* module types */
 #define LINKEVENT_MODULE_NOT_PRESENT			1
 #define LINKEVENT_MODULE_OPTICAL_UNKNOWN		2
@@ -992,6 +1011,8 @@ struct qlcnic_ipaddr {
 #define QLCNIC_APP_CHANGED_FLAGS	0x20000
 #define QLCNIC_HAS_PHYS_PORT_ID		0x40000
 #define QLCNIC_TSS_RSS			0x80000
+#define QLCNIC_ADD_VXLAN_PORT		0x100000
+#define QLCNIC_DEL_VXLAN_PORT		0x200000
 
 #define QLCNIC_IS_MSI_FAMILY(adapter) \
 	((adapter)->flags & (QLCNIC_MSI_ENABLED | QLCNIC_MSIX_ENABLED))
@@ -1806,6 +1827,18 @@ struct qlcnic_hardware_ops {
 
 extern struct qlcnic_nic_template qlcnic_vf_ops;
 
+static inline bool qlcnic_encap_tx_offload(struct qlcnic_adapter *adapter)
+{
+	return adapter->ahw->extra_capability[0] &
+	       QLCNIC_83XX_FW_CAPAB_ENCAP_TX_OFFLOAD;
+}
+
+static inline bool qlcnic_encap_rx_offload(struct qlcnic_adapter *adapter)
+{
+	return adapter->ahw->extra_capability[0] &
+	       QLCNIC_83XX_FW_CAPAB_ENCAP_RX_OFFLOAD;
+}
+
 static inline int qlcnic_start_firmware(struct qlcnic_adapter *adapter)
 {
 	return adapter->nic_ops->start_firmware(adapter);

drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c

@@ -77,7 +77,7 @@ static const struct qlcnic_mailbox_metadata qlcnic_83xx_mbx_tbl[] = {
 	{QLCNIC_CMD_GET_PORT_CONFIG, 2, 2},
 	{QLCNIC_CMD_GET_LINK_STATUS, 2, 4},
 	{QLCNIC_CMD_IDC_ACK, 5, 1},
-	{QLCNIC_CMD_INIT_NIC_FUNC, 2, 1},
+	{QLCNIC_CMD_INIT_NIC_FUNC, 3, 1},
 	{QLCNIC_CMD_STOP_NIC_FUNC, 2, 1},
 	{QLCNIC_CMD_SET_LED_CONFIG, 5, 1},
 	{QLCNIC_CMD_GET_LED_CONFIG, 1, 5},
@@ -87,6 +87,7 @@ static const struct qlcnic_mailbox_metadata qlcnic_83xx_mbx_tbl[] = {
 	{QLCNIC_CMD_BC_EVENT_SETUP, 2, 1},
 	{QLCNIC_CMD_DCB_QUERY_CAP, 1, 2},
 	{QLCNIC_CMD_DCB_QUERY_PARAM, 1, 50},
+	{QLCNIC_CMD_SET_INGRESS_ENCAP, 2, 1},
 };
 
 const u32 qlcnic_83xx_ext_reg_tbl[] = {

drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.h

@@ -528,8 +528,9 @@ enum qlc_83xx_ext_regs {
 };
 
 /* Initialize/Stop NIC command bit definitions */
-#define QLC_REGISTER_DCB_AEN		BIT_1
 #define QLC_REGISTER_LB_IDC		BIT_0
+#define QLC_REGISTER_DCB_AEN		BIT_1
+#define QLC_83XX_MULTI_TENANCY_INFO	BIT_29
 #define QLC_INIT_FW_RESOURCES		BIT_31
 
 /* 83xx funcitons */

drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_init.c

@@ -1020,10 +1020,97 @@ static int qlcnic_83xx_idc_check_state_validity(struct qlcnic_adapter *adapter,
 	return 0;
 }
 
+#define QLC_83XX_ENCAP_TYPE_VXLAN	BIT_1
+#define QLC_83XX_MATCH_ENCAP_ID		BIT_2
+#define QLC_83XX_SET_VXLAN_UDP_DPORT	BIT_3
+#define QLC_83XX_VXLAN_UDP_DPORT(PORT)	((PORT & 0xffff) << 16)
+
+#define QLCNIC_ENABLE_INGRESS_ENCAP_PARSING 1
+#define QLCNIC_DISABLE_INGRESS_ENCAP_PARSING 0
+
+static int qlcnic_set_vxlan_port(struct qlcnic_adapter *adapter)
+{
+	u16 port = adapter->ahw->vxlan_port;
+	struct qlcnic_cmd_args cmd;
+	int ret = 0;
+
+	memset(&cmd, 0, sizeof(cmd));
+
+	ret = qlcnic_alloc_mbx_args(&cmd, adapter,
+				    QLCNIC_CMD_INIT_NIC_FUNC);
+	if (ret)
+		return ret;
+
+	cmd.req.arg[1] = QLC_83XX_MULTI_TENANCY_INFO;
+	cmd.req.arg[2] = QLC_83XX_ENCAP_TYPE_VXLAN |
+			 QLC_83XX_SET_VXLAN_UDP_DPORT |
+			 QLC_83XX_VXLAN_UDP_DPORT(port);
+
+	ret = qlcnic_issue_cmd(adapter, &cmd);
+	if (ret)
+		netdev_err(adapter->netdev,
+			   "Failed to set VXLAN port %d in adapter\n",
+			   port);
+
+	qlcnic_free_mbx_args(&cmd);
+
+	return ret;
+}
+
+static int qlcnic_set_vxlan_parsing(struct qlcnic_adapter *adapter,
+				    bool state)
+{
+	u16 vxlan_port = adapter->ahw->vxlan_port;
+	struct qlcnic_cmd_args cmd;
+	int ret = 0;
+
+	memset(&cmd, 0, sizeof(cmd));
+
+	ret = qlcnic_alloc_mbx_args(&cmd, adapter,
+				    QLCNIC_CMD_SET_INGRESS_ENCAP);
+	if (ret)
+		return ret;
+
+	cmd.req.arg[1] = state ? QLCNIC_ENABLE_INGRESS_ENCAP_PARSING :
+				 QLCNIC_DISABLE_INGRESS_ENCAP_PARSING;
+
+	ret = qlcnic_issue_cmd(adapter, &cmd);
+	if (ret)
+		netdev_err(adapter->netdev,
+			   "Failed to %s VXLAN parsing for port %d\n",
+			   state ? "enable" : "disable", vxlan_port);
+	else
+		netdev_info(adapter->netdev,
+			    "%s VXLAN parsing for port %d\n",
+			    state ? "Enabled" : "Disabled", vxlan_port);
+
+	qlcnic_free_mbx_args(&cmd);
+
+	return ret;
+}
+
 static void qlcnic_83xx_periodic_tasks(struct qlcnic_adapter *adapter)
 {
+	struct qlcnic_hardware_context *ahw = adapter->ahw;
+
 	if (adapter->fhash.fnum)
 		qlcnic_prune_lb_filters(adapter);
+
+	if (adapter->flags & QLCNIC_ADD_VXLAN_PORT) {
+		if (qlcnic_set_vxlan_port(adapter))
+			return;
+
+		if (qlcnic_set_vxlan_parsing(adapter, true))
+			return;
+
+		adapter->flags &= ~QLCNIC_ADD_VXLAN_PORT;
+	} else if (adapter->flags & QLCNIC_DEL_VXLAN_PORT) {
+		if (qlcnic_set_vxlan_parsing(adapter, false))
+			return;
+
+		ahw->vxlan_port = 0;
+		adapter->flags &= ~QLCNIC_DEL_VXLAN_PORT;
+	}
 }
 
 /**

drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c

@@ -47,6 +47,12 @@ static const struct qlcnic_stats qlcnic_gstrings_stats[] = {
 	{"lro_pkts", QLC_SIZEOF(stats.lro_pkts), QLC_OFF(stats.lro_pkts)},
 	{"lrobytes", QLC_SIZEOF(stats.lrobytes), QLC_OFF(stats.lrobytes)},
 	{"lso_frames", QLC_SIZEOF(stats.lso_frames), QLC_OFF(stats.lso_frames)},
+	{"encap_lso_frames", QLC_SIZEOF(stats.encap_lso_frames),
+	 QLC_OFF(stats.encap_lso_frames)},
+	{"encap_tx_csummed", QLC_SIZEOF(stats.encap_tx_csummed),
+	 QLC_OFF(stats.encap_tx_csummed)},
+	{"encap_rx_csummed", QLC_SIZEOF(stats.encap_rx_csummed),
+	 QLC_OFF(stats.encap_rx_csummed)},
 	{"skb_alloc_failure", QLC_SIZEOF(stats.skb_alloc_failure),
 	 QLC_OFF(stats.skb_alloc_failure)},
 	{"mac_filter_limit_overrun", QLC_SIZEOF(stats.mac_filter_limit_overrun),

drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.h

@@ -98,6 +98,7 @@ enum qlcnic_regs {
 #define QLCNIC_CMD_GET_LINK_EVENT		0x48
 #define QLCNIC_CMD_CONFIGURE_MAC_RX_MODE	0x49
 #define QLCNIC_CMD_CONFIGURE_HW_LRO		0x4A
+#define QLCNIC_CMD_SET_INGRESS_ENCAP		0x4E
 #define QLCNIC_CMD_INIT_NIC_FUNC		0x60
 #define QLCNIC_CMD_STOP_NIC_FUNC		0x61
 #define QLCNIC_CMD_IDC_ACK			0x63

drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c

@@ -13,16 +13,19 @@
 
 #include "qlcnic.h"
 
-#define TX_ETHER_PKT	0x01
-#define TX_TCP_PKT	0x02
-#define TX_UDP_PKT	0x03
-#define TX_IP_PKT	0x04
-#define TX_TCP_LSO	0x05
-#define TX_TCP_LSO6	0x06
-#define TX_TCPV6_PKT	0x0b
-#define TX_UDPV6_PKT	0x0c
-#define FLAGS_VLAN_TAGGED	0x10
-#define FLAGS_VLAN_OOB		0x40
+#define QLCNIC_TX_ETHER_PKT		0x01
+#define QLCNIC_TX_TCP_PKT		0x02
+#define QLCNIC_TX_UDP_PKT		0x03
+#define QLCNIC_TX_IP_PKT		0x04
+#define QLCNIC_TX_TCP_LSO		0x05
+#define QLCNIC_TX_TCP_LSO6		0x06
+#define QLCNIC_TX_ENCAP_PKT		0x07
+#define QLCNIC_TX_ENCAP_LSO		0x08
+#define QLCNIC_TX_TCPV6_PKT		0x0b
+#define QLCNIC_TX_UDPV6_PKT		0x0c
+
+#define QLCNIC_FLAGS_VLAN_TAGGED	0x10
+#define QLCNIC_FLAGS_VLAN_OOB		0x40
 
 #define qlcnic_set_tx_vlan_tci(cmd_desc, v)	\
 	(cmd_desc)->vlan_TCI = cpu_to_le16(v);
@@ -364,6 +367,101 @@ static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
 	spin_unlock(&adapter->mac_learn_lock);
 }
 
+#define QLCNIC_ENCAP_VXLAN_PKT		BIT_0
+#define QLCNIC_ENCAP_OUTER_L3_IP6	BIT_1
+#define QLCNIC_ENCAP_INNER_L3_IP6	BIT_2
+#define QLCNIC_ENCAP_INNER_L4_UDP	BIT_3
+#define QLCNIC_ENCAP_DO_L3_CSUM		BIT_4
+#define QLCNIC_ENCAP_DO_L4_CSUM		BIT_5
+
+static int qlcnic_tx_encap_pkt(struct qlcnic_adapter *adapter,
+			       struct cmd_desc_type0 *first_desc,
+			       struct sk_buff *skb,
+			       struct qlcnic_host_tx_ring *tx_ring)
+{
+	u8 opcode = 0, inner_hdr_len = 0, outer_hdr_len = 0, total_hdr_len = 0;
+	int copied, copy_len, descr_size;
+	u32 producer = tx_ring->producer;
+	struct cmd_desc_type0 *hwdesc;
+	u16 flags = 0, encap_descr = 0;
+
+	opcode = QLCNIC_TX_ETHER_PKT;
+	encap_descr = QLCNIC_ENCAP_VXLAN_PKT;
+
+	if (skb_is_gso(skb)) {
+		inner_hdr_len = skb_inner_transport_header(skb) +
+				inner_tcp_hdrlen(skb) -
+				skb_inner_mac_header(skb);
+
+		/* VXLAN header size = 8 */
+		outer_hdr_len = skb_transport_offset(skb) + 8 +
+				sizeof(struct udphdr);
+		first_desc->outer_hdr_length = outer_hdr_len;
+		total_hdr_len = inner_hdr_len + outer_hdr_len;
+		encap_descr |= QLCNIC_ENCAP_DO_L3_CSUM |
+			       QLCNIC_ENCAP_DO_L4_CSUM;
+		first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
+		first_desc->hdr_length = inner_hdr_len;
+
+		/* Copy inner and outer headers in Tx descriptor(s)
+		 * If total_hdr_len > cmd_desc_type0, use multiple
+		 * descriptors
+		 */
+		copied = 0;
+		descr_size = (int)sizeof(struct cmd_desc_type0);
+		while (copied < total_hdr_len) {
+			copy_len = min(descr_size, (total_hdr_len - copied));
+			hwdesc = &tx_ring->desc_head[producer];
+			tx_ring->cmd_buf_arr[producer].skb = NULL;
+			skb_copy_from_linear_data_offset(skb, copied,
+							 (char *)hwdesc,
+							 copy_len);
+			copied += copy_len;
+			producer = get_next_index(producer, tx_ring->num_desc);
+		}
+
+		tx_ring->producer = producer;
+
+		/* Make sure updated tx_ring->producer is visible
+		 * for qlcnic_tx_avail()
+		 */
+		smp_mb();
+		adapter->stats.encap_lso_frames++;
+
+		opcode = QLCNIC_TX_ENCAP_LSO;
+	} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
+		if (inner_ip_hdr(skb)->version == 6) {
+			if (inner_ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
+				encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
+		} else {
+			if (inner_ip_hdr(skb)->protocol == IPPROTO_UDP)
+				encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
+		}
+
+		adapter->stats.encap_tx_csummed++;
+		opcode = QLCNIC_TX_ENCAP_PKT;
+	}
+
+	/* Prepare first 16 bits of byte offset 16 of Tx descriptor */
+	if (ip_hdr(skb)->version == 6)
+		encap_descr |= QLCNIC_ENCAP_OUTER_L3_IP6;
+
+	/* outer IP header's size in 32bit words size*/
+	encap_descr |= (skb_network_header_len(skb) >> 2) << 6;
+
+	/* outer IP header offset */
+	encap_descr |= skb_network_offset(skb) << 10;
+	first_desc->encap_descr = cpu_to_le16(encap_descr);
+
+	first_desc->tcp_hdr_offset = skb_inner_transport_header(skb) -
+				     skb->data;
+	first_desc->ip_hdr_offset = skb_inner_network_offset(skb);
+
+	qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
+
+	return 0;
+}
+
 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
 			 struct cmd_desc_type0 *first_desc, struct sk_buff *skb,
 			 struct qlcnic_host_tx_ring *tx_ring)
@@ -378,11 +476,11 @@ static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
 
 	if (protocol == ETH_P_8021Q) {
 		vh = (struct vlan_ethhdr *)skb->data;
-		flags = FLAGS_VLAN_TAGGED;
+		flags = QLCNIC_FLAGS_VLAN_TAGGED;
 		vlan_tci = ntohs(vh->h_vlan_TCI);
 		protocol = ntohs(vh->h_vlan_encapsulated_proto);
 	} else if (vlan_tx_tag_present(skb)) {
-		flags = FLAGS_VLAN_OOB;
+		flags = QLCNIC_FLAGS_VLAN_OOB;
 		vlan_tci = vlan_tx_tag_get(skb);
 	}
 	if (unlikely(adapter->tx_pvid)) {
@@ -391,7 +489,7 @@ static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
 		if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
 			goto set_flags;
 
-		flags = FLAGS_VLAN_OOB;
+		flags = QLCNIC_FLAGS_VLAN_OOB;
 		vlan_tci = adapter->tx_pvid;
 	}
 set_flags:
@@ -402,25 +500,26 @@ static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
 		flags |= BIT_0;
 		memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
 	}
-	opcode = TX_ETHER_PKT;
+	opcode = QLCNIC_TX_ETHER_PKT;
 	if (skb_is_gso(skb)) {
 		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 		first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
-		first_desc->total_hdr_length = hdr_len;
-		opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO;
+		first_desc->hdr_length = hdr_len;
+		opcode = (protocol == ETH_P_IPV6) ? QLCNIC_TX_TCP_LSO6 :
+						    QLCNIC_TX_TCP_LSO;
 
 		/* For LSO, we need to copy the MAC/IP/TCP headers into
 		* the descriptor ring */
 		copied = 0;
 		offset = 2;
 
-		if (flags & FLAGS_VLAN_OOB) {
-			first_desc->total_hdr_length += VLAN_HLEN;
+		if (flags & QLCNIC_FLAGS_VLAN_OOB) {
+			first_desc->hdr_length += VLAN_HLEN;
 			first_desc->tcp_hdr_offset = VLAN_HLEN;
 			first_desc->ip_hdr_offset = VLAN_HLEN;
 
 			/* Only in case of TSO on vlan device */
-			flags |= FLAGS_VLAN_TAGGED;
+			flags |= QLCNIC_FLAGS_VLAN_TAGGED;
 
 			/* Create a TSO vlan header template for firmware */
 			hwdesc = &tx_ring->desc_head[producer];
@@ -464,16 +563,16 @@ static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
 			l4proto = ip_hdr(skb)->protocol;
 
 			if (l4proto == IPPROTO_TCP)
-				opcode = TX_TCP_PKT;
+				opcode = QLCNIC_TX_TCP_PKT;
 			else if (l4proto == IPPROTO_UDP)
-				opcode = TX_UDP_PKT;
+				opcode = QLCNIC_TX_UDP_PKT;
 		} else if (protocol == ETH_P_IPV6) {
 			l4proto = ipv6_hdr(skb)->nexthdr;
 
 			if (l4proto == IPPROTO_TCP)
-				opcode = TX_TCPV6_PKT;
+				opcode = QLCNIC_TX_TCPV6_PKT;
 			else if (l4proto == IPPROTO_UDP)
-				opcode = TX_UDPV6_PKT;
+				opcode = QLCNIC_TX_UDPV6_PKT;
 		}
 	}
 	first_desc->tcp_hdr_offset += skb_transport_offset(skb);
@@ -563,6 +662,8 @@ netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 	struct ethhdr *phdr;
 	int i, k, frag_count, delta = 0;
 	u32 producer, num_txd;
+	u16 protocol;
+	bool l4_is_udp = false;
 
 	if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
 		netif_tx_stop_all_queues(netdev);
@@ -653,8 +754,23 @@ netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 	tx_ring->producer = get_next_index(producer, num_txd);
 	smp_mb();
 
-	if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb, tx_ring)))
-		goto unwind_buff;
+	protocol = ntohs(skb->protocol);
+	if (protocol == ETH_P_IP)
+		l4_is_udp = ip_hdr(skb)->protocol == IPPROTO_UDP;
+	else if (protocol == ETH_P_IPV6)
+		l4_is_udp = ipv6_hdr(skb)->nexthdr == IPPROTO_UDP;
+
+	/* Check if it is a VXLAN packet */
+	if (!skb->encapsulation || !l4_is_udp ||
+	    !qlcnic_encap_tx_offload(adapter)) {
+		if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb,
+					   tx_ring)))
+			goto unwind_buff;
+	} else {
+		if (unlikely(qlcnic_tx_encap_pkt(adapter, first_desc,
+						 skb, tx_ring)))
+			goto unwind_buff;
+	}
 
 	if (adapter->drv_mac_learn)
 		qlcnic_send_filter(adapter, first_desc, skb);
@@ -1587,6 +1703,13 @@ static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
 		return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
 }
 
+#define QLCNIC_ENCAP_LENGTH_MASK	0x7f
+
+static inline u8 qlcnic_encap_length(u64 sts_data)
+{
+	return sts_data & QLCNIC_ENCAP_LENGTH_MASK;
+}
+
 static struct qlcnic_rx_buffer *
 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
 			struct qlcnic_host_sds_ring *sds_ring,
@@ -1637,6 +1760,12 @@ qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
 
 	skb->protocol = eth_type_trans(skb, netdev);
 
+	if (qlcnic_encap_length(sts_data[1]) &&
+	    skb->ip_summed == CHECKSUM_UNNECESSARY) {
+		skb->encapsulation = 1;
+		adapter->stats.encap_rx_csummed++;
+	}
+
 	if (vid != 0xffff)
 		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
 

drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c

@@ -21,6 +21,7 @@
 #include <linux/aer.h>
 #include <linux/log2.h>
 #include <linux/pci.h>
+#include <net/vxlan.h>
 
 MODULE_DESCRIPTION("QLogic 1/10 GbE Converged/Intelligent Ethernet Driver");
 MODULE_LICENSE("GPL");
@@ -461,6 +462,35 @@ static int qlcnic_get_phys_port_id(struct net_device *netdev,
 	return 0;
 }
 
+static void qlcnic_add_vxlan_port(struct net_device *netdev,
+				  sa_family_t sa_family, __be16 port)
+{
+	struct qlcnic_adapter *adapter = netdev_priv(netdev);
+	struct qlcnic_hardware_context *ahw = adapter->ahw;
+
+	/* Adapter supports only one VXLAN port. Use very first port
+	 * for enabling offload
+	 */
+	if (!qlcnic_encap_rx_offload(adapter) || ahw->vxlan_port)
+		return;
+
+	ahw->vxlan_port = ntohs(port);
+	adapter->flags |= QLCNIC_ADD_VXLAN_PORT;
+}
+
+static void qlcnic_del_vxlan_port(struct net_device *netdev,
+				  sa_family_t sa_family, __be16 port)
+{
+	struct qlcnic_adapter *adapter = netdev_priv(netdev);
+	struct qlcnic_hardware_context *ahw = adapter->ahw;
+
+	if (!qlcnic_encap_rx_offload(adapter) || !ahw->vxlan_port ||
+	    (ahw->vxlan_port != ntohs(port)))
+		return;
+
+	adapter->flags |= QLCNIC_DEL_VXLAN_PORT;
+}
+
 static const struct net_device_ops qlcnic_netdev_ops = {
 	.ndo_open	   = qlcnic_open,
 	.ndo_stop	   = qlcnic_close,
@@ -479,6 +509,8 @@ static const struct net_device_ops qlcnic_netdev_ops = {
 	.ndo_fdb_del		= qlcnic_fdb_del,
 	.ndo_fdb_dump		= qlcnic_fdb_dump,
 	.ndo_get_phys_port_id	= qlcnic_get_phys_port_id,
+	.ndo_add_vxlan_port	= qlcnic_add_vxlan_port,
+	.ndo_del_vxlan_port	= qlcnic_del_vxlan_port,
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller = qlcnic_poll_controller,
 #endif
@@ -1943,6 +1975,9 @@ qlcnic_attach(struct qlcnic_adapter *adapter)
 
 	qlcnic_create_sysfs_entries(adapter);
 
+	if (qlcnic_encap_rx_offload(adapter))
+		vxlan_get_rx_port(netdev);
+
 	adapter->is_up = QLCNIC_ADAPTER_UP_MAGIC;
 	return 0;
 
@@ -2205,6 +2240,19 @@ qlcnic_setup_netdev(struct qlcnic_adapter *adapter, struct net_device *netdev,
 	if (adapter->ahw->capabilities & QLCNIC_FW_CAPABILITY_HW_LRO)
 		netdev->features |= NETIF_F_LRO;
 
+	if (qlcnic_encap_tx_offload(adapter)) {
+		netdev->features |= NETIF_F_GSO_UDP_TUNNEL;
+
+		/* encapsulation Tx offload supported by Adapter */
+		netdev->hw_enc_features = NETIF_F_IP_CSUM        |
+					  NETIF_F_GSO_UDP_TUNNEL |
+					  NETIF_F_TSO            |
+					  NETIF_F_TSO6;
+	}
+
+	if (qlcnic_encap_rx_offload(adapter))
+		netdev->hw_enc_features |= NETIF_F_RXCSUM;
+
 	netdev->hw_features = netdev->features;
 	netdev->priv_flags |= IFF_UNICAST_FLT;
 	netdev->irq = adapter->msix_entries[0].vector;