Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:
 "Highlights:

   1) Steady transitioning of the BPF instructure to a generic spot so
      all kernel subsystems can make use of it, from Alexei Starovoitov.

   2) SFC driver supports busy polling, from Alexandre Rames.

   3) Take advantage of hash table in UDP multicast delivery, from David
      Held.

   4) Lighten locking, in particular by getting rid of the LRU lists, in
      inet frag handling.  From Florian Westphal.

   5) Add support for various RFC6458 control messages in SCTP, from
      Geir Ola Vaagland.

   6) Allow to filter bridge forwarding database dumps by device, from
      Jamal Hadi Salim.

   7) virtio-net also now supports busy polling, from Jason Wang.

   8) Some low level optimization tweaks in pktgen from Jesper Dangaard
      Brouer.

   9) Add support for ipv6 address generation modes, so that userland
      can have some input into the process.  From Jiri Pirko.

  10) Consolidate common TCP connection request code in ipv4 and ipv6,
      from Octavian Purdila.

  11) New ARP packet logger in netfilter, from Pablo Neira Ayuso.

  12) Generic resizable RCU hash table, with intial users in netlink and
      nftables.  From Thomas Graf.

  13) Maintain a name assignment type so that userspace can see where a
      network device name came from (enumerated by kernel, assigned
      explicitly by userspace, etc.) From Tom Gundersen.

  14) Automatic flow label generation on transmit in ipv6, from Tom
      Herbert.

  15) New packet timestamping facilities from Willem de Bruijn, meant to
      assist in measuring latencies going into/out-of the packet
      scheduler, latency from TCP data transmission to ACK, etc"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1536 commits)
  cxgb4 : Disable recursive mailbox commands when enabling vi
  net: reduce USB network driver config options.
  tg3: Modify tg3_tso_bug() to handle multiple TX rings
  amd-xgbe: Perform phy connect/disconnect at dev open/stop
  amd-xgbe: Use dma_set_mask_and_coherent to set DMA mask
  net: sun4i-emac: fix memory leak on bad packet
  sctp: fix possible seqlock seadlock in sctp_packet_transmit()
  Revert "net: phy: Set the driver when registering an MDIO bus device"
  cxgb4vf: Turn off SGE RX/TX Callback Timers and interrupts in PCI shutdown routine
  team: Simplify return path of team_newlink
  bridge: Update outdated comment on promiscuous mode
  net-timestamp: ACK timestamp for bytestreams
  net-timestamp: TCP timestamping
  net-timestamp: SCHED timestamp on entering packet scheduler
  net-timestamp: add key to disambiguate concurrent datagrams
  net-timestamp: move timestamp flags out of sk_flags
  net-timestamp: extend SCM_TIMESTAMPING ancillary data struct
  cxgb4i : Move stray CPL definitions to cxgb4 driver
  tcp: reduce spurious retransmits due to transient SACK reneging
  qlcnic: Initialize dcbnl_ops before register_netdev
  ...

3 files changed, 563 insertions, 62 deletions

diff --git a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
index e8ee5e5fe0ef..79788a12712d 100644
--- a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
+++ b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
@@ -19,6 +19,7 @@
 #include <net/tcp.h>
 #include <net/dst.h>
 #include <linux/netdevice.h>
+#include <net/addrconf.h>
 
 #include "t4_regs.h"
 #include "t4_msg.h"
@@ -150,6 +151,7 @@ static struct scsi_transport_template *cxgb4i_stt;
  * The section below implments CPLs that related to iscsi tcp connection
  * open/close/abort and data send/receive.
  */
+
 #define DIV_ROUND_UP(n, d)	(((n) + (d) - 1) / (d))
 #define RCV_BUFSIZ_MASK		0x3FFU
 #define MAX_IMM_TX_PKT_LEN	128
@@ -179,6 +181,7 @@ static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
 				struct l2t_entry *e)
 {
 	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
+	int t4 = is_t4(lldi->adapter_type);
 	int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
 	unsigned long long opt0;
 	unsigned int opt2;
@@ -248,6 +251,97 @@ static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
 	}
 
 	set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
+
+	pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
+		       (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk,
+		       csk->state, csk->flags, csk->atid, csk->rss_qid);
+
+	cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
+}
+
+static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
+			       struct l2t_entry *e)
+{
+	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
+	int t4 = is_t4(lldi->adapter_type);
+	int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
+	unsigned long long opt0;
+	unsigned int opt2;
+	unsigned int qid_atid = ((unsigned int)csk->atid) |
+				 (((unsigned int)csk->rss_qid) << 14);
+
+	opt0 = KEEP_ALIVE(1) |
+		WND_SCALE(wscale) |
+		MSS_IDX(csk->mss_idx) |
+		L2T_IDX(((struct l2t_entry *)csk->l2t)->idx) |
+		TX_CHAN(csk->tx_chan) |
+		SMAC_SEL(csk->smac_idx) |
+		ULP_MODE(ULP_MODE_ISCSI) |
+		RCV_BUFSIZ(cxgb4i_rcv_win >> 10);
+
+	opt2 = RX_CHANNEL(0) |
+		RSS_QUEUE_VALID |
+		RX_FC_DISABLE |
+		RSS_QUEUE(csk->rss_qid);
+
+	if (t4) {
+		struct cpl_act_open_req6 *req =
+			    (struct cpl_act_open_req6 *)skb->head;
+
+		INIT_TP_WR(req, 0);
+		OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
+							    qid_atid));
+		req->local_port = csk->saddr6.sin6_port;
+		req->peer_port = csk->daddr6.sin6_port;
+
+		req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
+		req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
+								    8);
+		req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
+		req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
+								    8);
+
+		req->opt0 = cpu_to_be64(opt0);
+
+		opt2 |= RX_FC_VALID;
+		req->opt2 = cpu_to_be32(opt2);
+
+		req->params = cpu_to_be32(cxgb4_select_ntuple(
+					  csk->cdev->ports[csk->port_id],
+					  csk->l2t));
+	} else {
+		struct cpl_t5_act_open_req6 *req =
+				(struct cpl_t5_act_open_req6 *)skb->head;
+
+		INIT_TP_WR(req, 0);
+		OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
+							    qid_atid));
+		req->local_port = csk->saddr6.sin6_port;
+		req->peer_port = csk->daddr6.sin6_port;
+		req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
+		req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
+									8);
+		req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
+		req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
+									8);
+		req->opt0 = cpu_to_be64(opt0);
+
+		opt2 |= T5_OPT_2_VALID;
+		req->opt2 = cpu_to_be32(opt2);
+
+		req->params = cpu_to_be64(V_FILTER_TUPLE(cxgb4_select_ntuple(
+					  csk->cdev->ports[csk->port_id],
+					  csk->l2t)));
+	}
+
+	set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
+
+	pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
+		t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid,
+		&csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
+		&csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
+		csk->rss_qid);
+
 	cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
 }
 
@@ -586,9 +680,11 @@ static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
 		goto rel_skb;
 	}
 
-	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
-		"csk 0x%p,%u,0x%lx, tid %u, atid %u, rseq %u.\n",
-		csk, csk->state, csk->flags, tid, atid, rcv_isn);
+	pr_info_ipaddr("atid 0x%x, tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n",
+		       (&csk->saddr), (&csk->daddr),
+		       atid, tid, csk, csk->state, csk->flags, rcv_isn);
+
+	module_put(THIS_MODULE);
 
 	cxgbi_sock_get(csk);
 	csk->tid = tid;
@@ -663,6 +759,9 @@ static void csk_act_open_retry_timer(unsigned long data)
 	struct sk_buff *skb;
 	struct cxgbi_sock *csk = (struct cxgbi_sock *)data;
 	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
+	void (*send_act_open_func)(struct cxgbi_sock *, struct sk_buff *,
+				   struct l2t_entry *);
+	int t4 = is_t4(lldi->adapter_type), size, size6;
 
 	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 		"csk 0x%p,%u,0x%lx,%u.\n",
@@ -670,20 +769,35 @@ static void csk_act_open_retry_timer(unsigned long data)
 
 	cxgbi_sock_get(csk);
 	spin_lock_bh(&csk->lock);
-	skb = alloc_wr(is_t4(lldi->adapter_type) ?
-				sizeof(struct cpl_act_open_req) :
-				sizeof(struct cpl_t5_act_open_req),
-			0, GFP_ATOMIC);
+
+	if (t4) {
+		size = sizeof(struct cpl_act_open_req);
+		size6 = sizeof(struct cpl_act_open_req6);
+	} else {
+		size = sizeof(struct cpl_t5_act_open_req);
+		size6 = sizeof(struct cpl_t5_act_open_req6);
+	}
+
+	if (csk->csk_family == AF_INET) {
+		send_act_open_func = send_act_open_req;
+		skb = alloc_wr(size, 0, GFP_ATOMIC);
+	} else {
+		send_act_open_func = send_act_open_req6;
+		skb = alloc_wr(size6, 0, GFP_ATOMIC);
+	}
+
 	if (!skb)
 		cxgbi_sock_fail_act_open(csk, -ENOMEM);
 	else {
 		skb->sk = (struct sock *)csk;
 		t4_set_arp_err_handler(skb, csk,
-					cxgbi_sock_act_open_req_arp_failure);
-		send_act_open_req(csk, skb, csk->l2t);
+				       cxgbi_sock_act_open_req_arp_failure);
+		send_act_open_func(csk, skb, csk->l2t);
 	}
+
 	spin_unlock_bh(&csk->lock);
 	cxgbi_sock_put(csk);
+
 }
 
 static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
@@ -703,10 +817,9 @@ static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
 		goto rel_skb;
 	}
 
-	pr_info("%pI4:%u-%pI4:%u, atid %u,%u, status %u, csk 0x%p,%u,0x%lx.\n",
-		&csk->saddr.sin_addr.s_addr, ntohs(csk->saddr.sin_port),
-		&csk->daddr.sin_addr.s_addr, ntohs(csk->daddr.sin_port),
-		atid, tid, status, csk, csk->state, csk->flags);
+	pr_info_ipaddr("tid %u/%u, status %u.\n"
+		       "csk 0x%p,%u,0x%lx. ", (&csk->saddr), (&csk->daddr),
+		       atid, tid, status, csk, csk->state, csk->flags);
 
 	if (status == CPL_ERR_RTX_NEG_ADVICE)
 		goto rel_skb;
@@ -746,9 +859,9 @@ static void do_peer_close(struct cxgbi_device *cdev, struct sk_buff *skb)
 		pr_err("can't find connection for tid %u.\n", tid);
 		goto rel_skb;
 	}
-	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
-		"csk 0x%p,%u,0x%lx,%u.\n",
-		csk, csk->state, csk->flags, csk->tid);
+	pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
+		       (&csk->saddr), (&csk->daddr),
+		       csk, csk->state, csk->flags, csk->tid);
 	cxgbi_sock_rcv_peer_close(csk);
 rel_skb:
 	__kfree_skb(skb);
@@ -767,9 +880,9 @@ static void do_close_con_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
 		pr_err("can't find connection for tid %u.\n", tid);
 		goto rel_skb;
 	}
-	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
-		"csk 0x%p,%u,0x%lx,%u.\n",
-		csk, csk->state, csk->flags, csk->tid);
+	pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u.\n",
+		       (&csk->saddr), (&csk->daddr),
+		       csk, csk->state, csk->flags, csk->tid);
 	cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt));
 rel_skb:
 	__kfree_skb(skb);
@@ -808,9 +921,9 @@ static void do_abort_req_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
 		goto rel_skb;
 	}
 
-	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
-		"csk 0x%p,%u,0x%lx, tid %u, status 0x%x.\n",
-		csk, csk->state, csk->flags, csk->tid, req->status);
+	pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
+		       (&csk->saddr), (&csk->daddr),
+		       csk, csk->state, csk->flags, csk->tid, req->status);
 
 	if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
 	    req->status == CPL_ERR_PERSIST_NEG_ADVICE)
@@ -851,10 +964,10 @@ static void do_abort_rpl_rss(struct cxgbi_device *cdev, struct sk_buff *skb)
 	if (!csk)
 		goto rel_skb;
 
-	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
-		"status 0x%x, csk 0x%p, s %u, 0x%lx.\n",
-		rpl->status, csk, csk ? csk->state : 0,
-		csk ? csk->flags : 0UL);
+	if (csk)
+		pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u, status %u.\n",
+			       (&csk->saddr), (&csk->daddr), csk,
+			       csk->state, csk->flags, csk->tid, rpl->status);
 
 	if (rpl->status == CPL_ERR_ABORT_FAILED)
 		goto rel_skb;
@@ -1163,15 +1276,35 @@ static int init_act_open(struct cxgbi_sock *csk)
 	struct cxgbi_device *cdev = csk->cdev;
 	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 	struct net_device *ndev = cdev->ports[csk->port_id];
-	struct port_info *pi = netdev_priv(ndev);
 	struct sk_buff *skb = NULL;
-	struct neighbour *n;
+	struct neighbour *n = NULL;
+	void *daddr;
 	unsigned int step;
+	unsigned int size, size6;
+	int t4 = is_t4(lldi->adapter_type);
 
 	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
 		"csk 0x%p,%u,0x%lx,%u.\n",
 		csk, csk->state, csk->flags, csk->tid);
 
+	if (csk->csk_family == AF_INET)
+		daddr = &csk->daddr.sin_addr.s_addr;
+#if IS_ENABLED(CONFIG_IPV6)
+	else if (csk->csk_family == AF_INET6)
+		daddr = &csk->daddr6.sin6_addr;
+#endif
+	else {
+		pr_err("address family 0x%x not supported\n", csk->csk_family);
+		goto rel_resource;
+	}
+
+	n = dst_neigh_lookup(csk->dst, daddr);
+
+	if (!n) {
+		pr_err("%s, can't get neighbour of csk->dst.\n", ndev->name);
+		goto rel_resource;
+	}
+
 	csk->atid = cxgb4_alloc_atid(lldi->tids, csk);
 	if (csk->atid < 0) {
 		pr_err("%s, NO atid available.\n", ndev->name);
@@ -1192,10 +1325,19 @@ static int init_act_open(struct cxgbi_sock *csk)
 	}
 	cxgbi_sock_get(csk);
 
-	skb = alloc_wr(is_t4(lldi->adapter_type) ?
-				sizeof(struct cpl_act_open_req) :
-				sizeof(struct cpl_t5_act_open_req),
-			0, GFP_ATOMIC);
+	if (t4) {
+		size = sizeof(struct cpl_act_open_req);
+		size6 = sizeof(struct cpl_act_open_req6);
+	} else {
+		size = sizeof(struct cpl_t5_act_open_req);
+		size6 = sizeof(struct cpl_t5_act_open_req6);
+	}
+
+	if (csk->csk_family == AF_INET)
+		skb = alloc_wr(size, 0, GFP_NOIO);
+	else
+		skb = alloc_wr(size6, 0, GFP_NOIO);
+
 	if (!skb)
 		goto rel_resource;
 	skb->sk = (struct sock *)csk;
@@ -1211,19 +1353,27 @@ static int init_act_open(struct cxgbi_sock *csk)
 	csk->txq_idx = cxgb4_port_idx(ndev) * step;
 	step = lldi->nrxq / lldi->nchan;
 	csk->rss_qid = lldi->rxq_ids[cxgb4_port_idx(ndev) * step];
-	csk->wr_max_cred = csk->wr_cred = lldi->wr_cred;
+	csk->wr_cred = lldi->wr_cred -
+		       DIV_ROUND_UP(sizeof(struct cpl_abort_req), 16);
+	csk->wr_max_cred = csk->wr_cred;
 	csk->wr_una_cred = 0;
 	cxgbi_sock_reset_wr_list(csk);
 	csk->err = 0;
-	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
-		"csk 0x%p,p%d,%s, %u,%u,%u, mss %u,%u, smac %u.\n",
-		csk, pi->port_id, ndev->name, csk->tx_chan,
-		csk->txq_idx, csk->rss_qid, csk->mtu, csk->mss_idx,
-		csk->smac_idx);
 
+	pr_info_ipaddr("csk 0x%p,%u,0x%lx,%u,%u,%u, mtu %u,%u, smac %u.\n",
+		       (&csk->saddr), (&csk->daddr), csk, csk->state,
+		       csk->flags, csk->tx_chan, csk->txq_idx, csk->rss_qid,
+		       csk->mtu, csk->mss_idx, csk->smac_idx);
+
+	/* must wait for either a act_open_rpl or act_open_establish */
+	try_module_get(THIS_MODULE);
 	cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
-	send_act_open_req(csk, skb, csk->l2t);
+	if (csk->csk_family == AF_INET)
+		send_act_open_req(csk, skb, csk->l2t);
+	else
+		send_act_open_req6(csk, skb, csk->l2t);
 	neigh_release(n);
+
 	return 0;
 
 rel_resource:
@@ -1234,8 +1384,6 @@ rel_resource:
 	return -EINVAL;
 }
 
-#define CPL_ISCSI_DATA		0xB2
-#define CPL_RX_ISCSI_DDP	0x49
 cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
 	[CPL_ACT_ESTABLISH] = do_act_establish,
 	[CPL_ACT_OPEN_RPL] = do_act_open_rpl,
@@ -1487,6 +1635,129 @@ static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
 	return 0;
 }
 
+#if IS_ENABLED(CONFIG_IPV6)
+static int cxgbi_inet6addr_handler(struct notifier_block *this,
+				   unsigned long event, void *data)
+{
+	struct inet6_ifaddr *ifa = data;
+	struct net_device *event_dev = ifa->idev->dev;
+	struct cxgbi_device *cdev;
+	int ret = NOTIFY_DONE;
+
+	if (event_dev->priv_flags & IFF_802_1Q_VLAN)
+		event_dev = vlan_dev_real_dev(event_dev);
+
+	cdev = cxgbi_device_find_by_netdev(event_dev, NULL);
+
+	if (!cdev)
+		return ret;
+
+	switch (event) {
+	case NETDEV_UP:
+		ret = cxgb4_clip_get(event_dev,
+				     (const struct in6_addr *)
+				     ((ifa)->addr.s6_addr));
+		if (ret < 0)
+			return ret;
+
+		ret = NOTIFY_OK;
+		break;
+
+	case NETDEV_DOWN:
+		cxgb4_clip_release(event_dev,
+				   (const struct in6_addr *)
+				   ((ifa)->addr.s6_addr));
+		ret = NOTIFY_OK;
+		break;
+
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+static struct notifier_block cxgbi_inet6addr_notifier = {
+	.notifier_call = cxgbi_inet6addr_handler
+};
+
+/* Retrieve IPv6 addresses from a root device (bond, vlan) associated with
+ * a physical device.
+ * The physical device reference is needed to send the actual CLIP command.
+ */
+static int update_dev_clip(struct net_device *root_dev, struct net_device *dev)
+{
+	struct inet6_dev *idev = NULL;
+	struct inet6_ifaddr *ifa;
+	int ret = 0;
+
+	idev = __in6_dev_get(root_dev);
+	if (!idev)
+		return ret;
+
+	read_lock_bh(&idev->lock);
+	list_for_each_entry(ifa, &idev->addr_list, if_list) {
+		pr_info("updating the clip for addr %pI6\n",
+			ifa->addr.s6_addr);
+		ret = cxgb4_clip_get(dev, (const struct in6_addr *)
+				     ifa->addr.s6_addr);
+		if (ret < 0)
+			break;
+	}
+
+	read_unlock_bh(&idev->lock);
+	return ret;
+}
+
+static int update_root_dev_clip(struct net_device *dev)
+{
+	struct net_device *root_dev = NULL;
+	int i, ret = 0;
+
+	/* First populate the real net device's IPv6 address */
+	ret = update_dev_clip(dev, dev);
+	if (ret)
+		return ret;
+
+	/* Parse all bond and vlan devices layered on top of the physical dev */
+	root_dev = netdev_master_upper_dev_get(dev);
+	if (root_dev) {
+		ret = update_dev_clip(root_dev, dev);
+		if (ret)
+			return ret;
+	}
+
+	for (i = 0; i < VLAN_N_VID; i++) {
+		root_dev = __vlan_find_dev_deep_rcu(dev, htons(ETH_P_8021Q), i);
+		if (!root_dev)
+			continue;
+
+		ret = update_dev_clip(root_dev, dev);
+		if (ret)
+			break;
+	}
+	return ret;
+}
+
+static void cxgbi_update_clip(struct cxgbi_device *cdev)
+{
+	int i;
+
+	rcu_read_lock();
+
+	for (i = 0; i < cdev->nports; i++) {
+		struct net_device *dev = cdev->ports[i];
+		int ret = 0;
+
+		if (dev)
+			ret = update_root_dev_clip(dev);
+		if (ret < 0)
+			break;
+	}
+	rcu_read_unlock();
+}
+#endif /* IS_ENABLED(CONFIG_IPV6) */
+
 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
 {
 	struct cxgbi_device *cdev;
@@ -1605,6 +1876,9 @@ static int t4_uld_state_change(void *handle, enum cxgb4_state state)
 	switch (state) {
 	case CXGB4_STATE_UP:
 		pr_info("cdev 0x%p, UP.\n", cdev);
+#if IS_ENABLED(CONFIG_IPV6)
+		cxgbi_update_clip(cdev);
+#endif
 		/* re-initialize */
 		break;
 	case CXGB4_STATE_START_RECOVERY:
@@ -1635,11 +1909,18 @@ static int __init cxgb4i_init_module(void)
 	if (rc < 0)
 		return rc;
 	cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
+
+#if IS_ENABLED(CONFIG_IPV6)
+	register_inet6addr_notifier(&cxgbi_inet6addr_notifier);
+#endif
 	return 0;
 }
 
 static void __exit cxgb4i_exit_module(void)
 {
+#if IS_ENABLED(CONFIG_IPV6)
+	unregister_inet6addr_notifier(&cxgbi_inet6addr_notifier);
+#endif
 	cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
 	cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
 	cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c
index b44c1cff3114..3d5322d59f15 100644
--- a/drivers/scsi/cxgbi/libcxgbi.c
+++ b/drivers/scsi/cxgbi/libcxgbi.c
@@ -24,6 +24,10 @@
 #include <linux/inet.h>
 #include <net/dst.h>
 #include <net/route.h>
+#include <net/ipv6.h>
+#include <net/ip6_route.h>
+#include <net/addrconf.h>
+
 #include <linux/inetdevice.h>	/* ip_dev_find */
 #include <linux/module.h>
 #include <net/tcp.h>
@@ -193,8 +197,8 @@ struct cxgbi_device *cxgbi_device_find_by_lldev(void *lldev)
 }
 EXPORT_SYMBOL_GPL(cxgbi_device_find_by_lldev);
 
-static struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev,
-							int *port)
+struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev,
+						 int *port)
 {
 	struct net_device *vdev = NULL;
 	struct cxgbi_device *cdev, *tmp;
@@ -224,6 +228,40 @@ static struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev,
 		"ndev 0x%p, %s, NO match found.\n", ndev, ndev->name);
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(cxgbi_device_find_by_netdev);
+
+static struct cxgbi_device *cxgbi_device_find_by_mac(struct net_device *ndev,
+						     int *port)
+{
+	struct net_device *vdev = NULL;
+	struct cxgbi_device *cdev, *tmp;
+	int i;
+
+	if (ndev->priv_flags & IFF_802_1Q_VLAN) {
+		vdev = ndev;
+		ndev = vlan_dev_real_dev(ndev);
+		pr_info("vlan dev %s -> %s.\n", vdev->name, ndev->name);
+	}
+
+	mutex_lock(&cdev_mutex);
+	list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) {
+		for (i = 0; i < cdev->nports; i++) {
+			if (!memcmp(ndev->dev_addr, cdev->ports[i]->dev_addr,
+				    MAX_ADDR_LEN)) {
+				cdev->hbas[i]->vdev = vdev;
+				mutex_unlock(&cdev_mutex);
+				if (port)
+					*port = i;
+				return cdev;
+			}
+		}
+	}
+	mutex_unlock(&cdev_mutex);
+	log_debug(1 << CXGBI_DBG_DEV,
+		  "ndev 0x%p, %s, NO match mac found.\n",
+		  ndev, ndev->name);
+	return NULL;
+}
 
 void cxgbi_hbas_remove(struct cxgbi_device *cdev)
 {
@@ -320,6 +358,7 @@ static int sock_get_port(struct cxgbi_sock *csk)
 	struct cxgbi_ports_map *pmap = &cdev->pmap;
 	unsigned int start;
 	int idx;
+	__be16 *port;
 
 	if (!pmap->max_connect) {
 		pr_err("cdev 0x%p, p#%u %s, NO port map.\n",
@@ -327,9 +366,14 @@ static int sock_get_port(struct cxgbi_sock *csk)
 		return -EADDRNOTAVAIL;
 	}
 
-	if (csk->saddr.sin_port) {
+	if (csk->csk_family == AF_INET)
+		port = &csk->saddr.sin_port;
+	else /* ipv6 */
+		port = &csk->saddr6.sin6_port;
+
+	if (*port) {
 		pr_err("source port NON-ZERO %u.\n",
-			ntohs(csk->saddr.sin_port));
+			ntohs(*port));
 		return -EADDRINUSE;
 	}
 
@@ -347,8 +391,7 @@ static int sock_get_port(struct cxgbi_sock *csk)
 			idx = 0;
 		if (!pmap->port_csk[idx]) {
 			pmap->used++;
-			csk->saddr.sin_port =
-				htons(pmap->sport_base + idx);
+			*port = htons(pmap->sport_base + idx);
 			pmap->next = idx;
 			pmap->port_csk[idx] = csk;
 			spin_unlock_bh(&pmap->lock);
@@ -374,16 +417,22 @@ static void sock_put_port(struct cxgbi_sock *csk)
 {
 	struct cxgbi_device *cdev = csk->cdev;
 	struct cxgbi_ports_map *pmap = &cdev->pmap;
+	__be16 *port;
 
-	if (csk->saddr.sin_port) {
-		int idx = ntohs(csk->saddr.sin_port) - pmap->sport_base;
+	if (csk->csk_family == AF_INET)
+		port = &csk->saddr.sin_port;
+	else /* ipv6 */
+		port = &csk->saddr6.sin6_port;
 
-		csk->saddr.sin_port = 0;
+	if (*port) {
+		int idx = ntohs(*port) - pmap->sport_base;
+
+		*port = 0;
 		if (idx < 0 || idx >= pmap->max_connect) {
 			pr_err("cdev 0x%p, p#%u %s, port %u OOR.\n",
 				cdev, csk->port_id,
 				cdev->ports[csk->port_id]->name,
-				ntohs(csk->saddr.sin_port));
+				ntohs(*port));
 			return;
 		}
 
@@ -479,17 +528,11 @@ static struct cxgbi_sock *cxgbi_check_route(struct sockaddr *dst_addr)
 	int port = 0xFFFF;
 	int err = 0;
 
-	if (daddr->sin_family != AF_INET) {
-		pr_info("address family 0x%x NOT supported.\n",
-			daddr->sin_family);
-		err = -EAFNOSUPPORT;
-		goto err_out;
-	}
-
 	rt = find_route_ipv4(&fl4, 0, daddr->sin_addr.s_addr, 0, daddr->sin_port, 0);
 	if (!rt) {
 		pr_info("no route to ipv4 0x%x, port %u.\n",
-			daddr->sin_addr.s_addr, daddr->sin_port);
+			be32_to_cpu(daddr->sin_addr.s_addr),
+			be16_to_cpu(daddr->sin_port));
 		err = -ENETUNREACH;
 		goto err_out;
 	}
@@ -537,9 +580,12 @@ static struct cxgbi_sock *cxgbi_check_route(struct sockaddr *dst_addr)
 	csk->port_id = port;
 	csk->mtu = mtu;
 	csk->dst = dst;
+
+	csk->csk_family = AF_INET;
 	csk->daddr.sin_addr.s_addr = daddr->sin_addr.s_addr;
 	csk->daddr.sin_port = daddr->sin_port;
 	csk->daddr.sin_family = daddr->sin_family;
+	csk->saddr.sin_family = daddr->sin_family;
 	csk->saddr.sin_addr.s_addr = fl4.saddr;
 	neigh_release(n);
 
@@ -556,6 +602,123 @@ err_out:
 	return ERR_PTR(err);
 }
 
+#if IS_ENABLED(CONFIG_IPV6)
+static struct rt6_info *find_route_ipv6(const struct in6_addr *saddr,
+					const struct in6_addr *daddr)
+{
+	struct flowi6 fl;
+
+	if (saddr)
+		memcpy(&fl.saddr, saddr, sizeof(struct in6_addr));
+	if (daddr)
+		memcpy(&fl.daddr, daddr, sizeof(struct in6_addr));
+	return (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl);
+}
+
+static struct cxgbi_sock *cxgbi_check_route6(struct sockaddr *dst_addr)
+{
+	struct sockaddr_in6 *daddr6 = (struct sockaddr_in6 *)dst_addr;
+	struct dst_entry *dst;
+	struct net_device *ndev;
+	struct cxgbi_device *cdev;
+	struct rt6_info *rt = NULL;
+	struct neighbour *n;
+	struct in6_addr pref_saddr;
+	struct cxgbi_sock *csk = NULL;
+	unsigned int mtu = 0;
+	int port = 0xFFFF;
+	int err = 0;
+
+	rt = find_route_ipv6(NULL, &daddr6->sin6_addr);
+
+	if (!rt) {
+		pr_info("no route to ipv6 %pI6 port %u\n",
+			daddr6->sin6_addr.s6_addr,
+			be16_to_cpu(daddr6->sin6_port));
+		err = -ENETUNREACH;
+		goto err_out;
+	}
+
+	dst = &rt->dst;
+
+	n = dst_neigh_lookup(dst, &daddr6->sin6_addr);
+
+	if (!n) {
+		pr_info("%pI6, port %u, dst no neighbour.\n",
+			daddr6->sin6_addr.s6_addr,
+			be16_to_cpu(daddr6->sin6_port));
+		err = -ENETUNREACH;
+		goto rel_rt;
+	}
+	ndev = n->dev;
+
+	if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr)) {
+		pr_info("multi-cast route %pI6 port %u, dev %s.\n",
+			daddr6->sin6_addr.s6_addr,
+			ntohs(daddr6->sin6_port), ndev->name);
+		err = -ENETUNREACH;
+		goto rel_rt;
+	}
+
+	cdev = cxgbi_device_find_by_netdev(ndev, &port);
+	if (!cdev)
+		cdev = cxgbi_device_find_by_mac(ndev, &port);
+	if (!cdev) {
+		pr_info("dst %pI6 %s, NOT cxgbi device.\n",
+			daddr6->sin6_addr.s6_addr, ndev->name);
+		err = -ENETUNREACH;
+		goto rel_rt;
+	}
+	log_debug(1 << CXGBI_DBG_SOCK,
+		  "route to %pI6 :%u, ndev p#%d,%s, cdev 0x%p.\n",
+		  daddr6->sin6_addr.s6_addr, ntohs(daddr6->sin6_port), port,
+		  ndev->name, cdev);
+
+	csk = cxgbi_sock_create(cdev);
+	if (!csk) {
+		err = -ENOMEM;
+		goto rel_rt;
+	}
+	csk->cdev = cdev;
+	csk->port_id = port;
+	csk->mtu = mtu;
+	csk->dst = dst;
+
+	if (ipv6_addr_any(&rt->rt6i_prefsrc.addr)) {
+		struct inet6_dev *idev = ip6_dst_idev((struct dst_entry *)rt);
+
+		err = ipv6_dev_get_saddr(&init_net, idev ? idev->dev : NULL,
+					 &daddr6->sin6_addr, 0, &pref_saddr);
+		if (err) {
+			pr_info("failed to get source address to reach %pI6\n",
+				&daddr6->sin6_addr);
+			goto rel_rt;
+		}
+	} else {
+		pref_saddr = rt->rt6i_prefsrc.addr;
+	}
+
+	csk->csk_family = AF_INET6;
+	csk->daddr6.sin6_addr = daddr6->sin6_addr;
+	csk->daddr6.sin6_port = daddr6->sin6_port;
+	csk->daddr6.sin6_family = daddr6->sin6_family;
+	csk->saddr6.sin6_addr = pref_saddr;
+
+	neigh_release(n);
+	return csk;
+
+rel_rt:
+	if (n)
+		neigh_release(n);
+
+	ip6_rt_put(rt);
+	if (csk)
+		cxgbi_sock_closed(csk);
+err_out:
+	return ERR_PTR(err);
+}
+#endif /* IS_ENABLED(CONFIG_IPV6) */
+
 void cxgbi_sock_established(struct cxgbi_sock *csk, unsigned int snd_isn,
 			unsigned int opt)
 {
@@ -2194,6 +2357,34 @@ int cxgbi_set_conn_param(struct iscsi_cls_conn *cls_conn,
 }
 EXPORT_SYMBOL_GPL(cxgbi_set_conn_param);
 
+static inline int csk_print_port(struct cxgbi_sock *csk, char *buf)
+{
+	int len;
+
+	cxgbi_sock_get(csk);
+	len = sprintf(buf, "%hu\n", ntohs(csk->daddr.sin_port));
+	cxgbi_sock_put(csk);
+
+	return len;
+}
+
+static inline int csk_print_ip(struct cxgbi_sock *csk, char *buf)
+{
+	int len;
+
+	cxgbi_sock_get(csk);
+	if (csk->csk_family == AF_INET)
+		len = sprintf(buf, "%pI4",
+			      &csk->daddr.sin_addr.s_addr);
+	else
+		len = sprintf(buf, "%pI6",
+			      &csk->daddr6.sin6_addr);
+
+	cxgbi_sock_put(csk);
+
+	return len;
+}
+
 int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param param,
 		       char *buf)
 {
@@ -2447,7 +2638,19 @@ struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *shost,
 		}
 	}
 
-	csk = cxgbi_check_route(dst_addr);
+	if (dst_addr->sa_family == AF_INET) {
+		csk = cxgbi_check_route(dst_addr);
+#if IS_ENABLED(CONFIG_IPV6)
+	} else if (dst_addr->sa_family == AF_INET6) {
+		csk = cxgbi_check_route6(dst_addr);
+#endif
+	} else {
+		pr_info("address family 0x%x NOT supported.\n",
+			dst_addr->sa_family);
+		err = -EAFNOSUPPORT;
+		return (struct iscsi_endpoint *)ERR_PTR(err);
+	}
+
 	if (IS_ERR(csk))
 		return (struct iscsi_endpoint *)csk;
 	cxgbi_sock_get(csk);
diff --git a/drivers/scsi/cxgbi/libcxgbi.h b/drivers/scsi/cxgbi/libcxgbi.h
index 8135f04671af..8ad73d913f02 100644
--- a/drivers/scsi/cxgbi/libcxgbi.h
+++ b/drivers/scsi/cxgbi/libcxgbi.h
@@ -44,6 +44,15 @@ enum cxgbi_dbg_flag {
 			pr_info(fmt, ##__VA_ARGS__); \
 	} while (0)
 
+#define pr_info_ipaddr(fmt_trail,					\
+			addr1, addr2, args_trail...)			\
+do {									\
+	if (!((1 << CXGBI_DBG_SOCK) & dbg_level))			\
+		break;							\
+	pr_info("%pISpc - %pISpc, " fmt_trail,				\
+		addr1, addr2, args_trail);				\
+} while (0)
+
 /* max. connections per adapter */
 #define CXGBI_MAX_CONN		16384
 
@@ -202,8 +211,15 @@ struct cxgbi_sock {
 	spinlock_t lock;
 	struct kref refcnt;
 	unsigned int state;
-	struct sockaddr_in saddr;
-	struct sockaddr_in daddr;
+	unsigned int csk_family;
+	union {
+		struct sockaddr_in saddr;
+		struct sockaddr_in6 saddr6;
+	};
+	union {
+		struct sockaddr_in daddr;
+		struct sockaddr_in6 daddr6;
+	};
 	struct dst_entry *dst;
 	struct sk_buff_head receive_queue;
 	struct sk_buff_head write_queue;
@@ -692,6 +708,7 @@ struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int);
 void cxgbi_device_unregister(struct cxgbi_device *);
 void cxgbi_device_unregister_all(unsigned int flag);
 struct cxgbi_device *cxgbi_device_find_by_lldev(void *);
+struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *, int *);
 int cxgbi_hbas_add(struct cxgbi_device *, unsigned int, unsigned int,
 			struct scsi_host_template *,
 			struct scsi_transport_template *);