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

Pull networking updates from David Miller:

 1) Add Maglev hashing scheduler to IPVS, from Inju Song.

 2) Lots of new TC subsystem tests from Roman Mashak.

 3) Add TCP zero copy receive and fix delayed acks and autotuning with
    SO_RCVLOWAT, from Eric Dumazet.

 4) Add XDP_REDIRECT support to mlx5 driver, from Jesper Dangaard
    Brouer.

 5) Add ttl inherit support to vxlan, from Hangbin Liu.

 6) Properly separate ipv6 routes into their logically independant
    components. fib6_info for the routing table, and fib6_nh for sets of
    nexthops, which thus can be shared. From David Ahern.

 7) Add bpf_xdp_adjust_tail helper, which can be used to generate ICMP
    messages from XDP programs. From Nikita V. Shirokov.

 8) Lots of long overdue cleanups to the r8169 driver, from Heiner
    Kallweit.

 9) Add BTF ("BPF Type Format"), from Martin KaFai Lau.

10) Add traffic condition monitoring to iwlwifi, from Luca Coelho.

11) Plumb extack down into fib_rules, from Roopa Prabhu.

12) Add Flower classifier offload support to igb, from Vinicius Costa
    Gomes.

13) Add UDP GSO support, from Willem de Bruijn.

14) Add documentation for eBPF helpers, from Quentin Monnet.

15) Add TLS tx offload to mlx5, from Ilya Lesokhin.

16) Allow applications to be given the number of bytes available to read
    on a socket via a control message returned from recvmsg(), from
    Soheil Hassas Yeganeh.

17) Add x86_32 eBPF JIT compiler, from Wang YanQing.

18) Add AF_XDP sockets, with zerocopy support infrastructure as well.
    From Björn Töpel.

19) Remove indirect load support from all of the BPF JITs and handle
    these operations in the verifier by translating them into native BPF
    instead. From Daniel Borkmann.

20) Add GRO support to ipv6 gre tunnels, from Eran Ben Elisha.

21) Allow XDP programs to do lookups in the main kernel routing tables
    for forwarding. From David Ahern.

22) Allow drivers to store hardware state into an ELF section of kernel
    dump vmcore files, and use it in cxgb4. From Rahul Lakkireddy.

23) Various RACK and loss detection improvements in TCP, from Yuchung
    Cheng.

24) Add TCP SACK compression, from Eric Dumazet.

25) Add User Mode Helper support and basic bpfilter infrastructure, from
    Alexei Starovoitov.

26) Support ports and protocol values in RTM_GETROUTE, from Roopa
    Prabhu.

27) Support bulking in ->ndo_xdp_xmit() API, from Jesper Dangaard
    Brouer.

28) Add lots of forwarding selftests, from Petr Machata.

29) Add generic network device failover driver, from Sridhar Samudrala.

* ra.kernel.org:/pub/scm/linux/kernel/git/davem/net-next: (1959 commits)
  strparser: Add __strp_unpause and use it in ktls.
  rxrpc: Fix terminal retransmission connection ID to include the channel
  net: hns3: Optimize PF CMDQ interrupt switching process
  net: hns3: Fix for VF mailbox receiving unknown message
  net: hns3: Fix for VF mailbox cannot receiving PF response
  bnx2x: use the right constant
  Revert "net: sched: cls: Fix offloading when ingress dev is vxlan"
  net: dsa: b53: Fix for brcm tag issue in Cygnus SoC
  enic: fix UDP rss bits
  netdev-FAQ: clarify DaveM's position for stable backports
  rtnetlink: validate attributes in do_setlink()
  mlxsw: Add extack messages for port_{un, }split failures
  netdevsim: Add extack error message for devlink reload
  devlink: Add extack to reload and port_{un, }split operations
  net: metrics: add proper netlink validation
  ipmr: fix error path when ipmr_new_table fails
  ip6mr: only set ip6mr_table from setsockopt when ip6mr_new_table succeeds
  net: hns3: remove unused hclgevf_cfg_func_mta_filter
  netfilter: provide udp*_lib_lookup for nf_tproxy
  qed*: Utilize FW 8.37.2.0
  ...

1 files changed, 726 insertions, 0 deletions

diff --git a/drivers/net/ethernet/netronome/nfp/flower/lag_conf.c b/drivers/net/ethernet/netronome/nfp/flower/lag_conf.c
new file mode 100644
index 000000000000..0c4c957717ea
--- /dev/null
+++ b/drivers/net/ethernet/netronome/nfp/flower/lag_conf.c
@@ -0,0 +1,726 @@
+/*
+ * Copyright (C) 2018 Netronome Systems, Inc.
+ *
+ * This software is dual licensed under the GNU General License Version 2,
+ * June 1991 as shown in the file COPYING in the top-level directory of this
+ * source tree or the BSD 2-Clause License provided below.  You have the
+ * option to license this software under the complete terms of either license.
+ *
+ * The BSD 2-Clause License:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      1. Redistributions of source code must retain the above
+ *         copyright notice, this list of conditions and the following
+ *         disclaimer.
+ *
+ *      2. Redistributions in binary form must reproduce the above
+ *         copyright notice, this list of conditions and the following
+ *         disclaimer in the documentation and/or other materials
+ *         provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "main.h"
+
+/* LAG group config flags. */
+#define NFP_FL_LAG_LAST			BIT(1)
+#define NFP_FL_LAG_FIRST		BIT(2)
+#define NFP_FL_LAG_DATA			BIT(3)
+#define NFP_FL_LAG_XON			BIT(4)
+#define NFP_FL_LAG_SYNC			BIT(5)
+#define NFP_FL_LAG_SWITCH		BIT(6)
+#define NFP_FL_LAG_RESET		BIT(7)
+
+/* LAG port state flags. */
+#define NFP_PORT_LAG_LINK_UP		BIT(0)
+#define NFP_PORT_LAG_TX_ENABLED		BIT(1)
+#define NFP_PORT_LAG_CHANGED		BIT(2)
+
+enum nfp_fl_lag_batch {
+	NFP_FL_LAG_BATCH_FIRST,
+	NFP_FL_LAG_BATCH_MEMBER,
+	NFP_FL_LAG_BATCH_FINISHED
+};
+
+/**
+ * struct nfp_flower_cmsg_lag_config - control message payload for LAG config
+ * @ctrl_flags:	Configuration flags
+ * @reserved:	Reserved for future use
+ * @ttl:	Time to live of packet - host always sets to 0xff
+ * @pkt_number:	Config message packet number - increment for each message
+ * @batch_ver:	Batch version of messages - increment for each batch of messages
+ * @group_id:	Group ID applicable
+ * @group_inst:	Group instance number - increment when group is reused
+ * @members:	Array of 32-bit words listing all active group members
+ */
+struct nfp_flower_cmsg_lag_config {
+	u8 ctrl_flags;
+	u8 reserved[2];
+	u8 ttl;
+	__be32 pkt_number;
+	__be32 batch_ver;
+	__be32 group_id;
+	__be32 group_inst;
+	__be32 members[];
+};
+
+/**
+ * struct nfp_fl_lag_group - list entry for each LAG group
+ * @group_id:		Assigned group ID for host/kernel sync
+ * @group_inst:		Group instance in case of ID reuse
+ * @list:		List entry
+ * @master_ndev:	Group master Netdev
+ * @dirty:		Marked if the group needs synced to HW
+ * @offloaded:		Marked if the group is currently offloaded to NIC
+ * @to_remove:		Marked if the group should be removed from NIC
+ * @to_destroy:		Marked if the group should be removed from driver
+ * @slave_cnt:		Number of slaves in group
+ */
+struct nfp_fl_lag_group {
+	unsigned int group_id;
+	u8 group_inst;
+	struct list_head list;
+	struct net_device *master_ndev;
+	bool dirty;
+	bool offloaded;
+	bool to_remove;
+	bool to_destroy;
+	unsigned int slave_cnt;
+};
+
+#define NFP_FL_LAG_PKT_NUMBER_MASK	GENMASK(30, 0)
+#define NFP_FL_LAG_VERSION_MASK		GENMASK(22, 0)
+#define NFP_FL_LAG_HOST_TTL		0xff
+
+/* Use this ID with zero members to ack a batch config */
+#define NFP_FL_LAG_SYNC_ID		0
+#define NFP_FL_LAG_GROUP_MIN		1 /* ID 0 reserved */
+#define NFP_FL_LAG_GROUP_MAX		32 /* IDs 1 to 31 are valid */
+
+/* wait for more config */
+#define NFP_FL_LAG_DELAY		(msecs_to_jiffies(2))
+
+#define NFP_FL_LAG_RETRANS_LIMIT	100 /* max retrans cmsgs to store */
+
+static unsigned int nfp_fl_get_next_pkt_number(struct nfp_fl_lag *lag)
+{
+	lag->pkt_num++;
+	lag->pkt_num &= NFP_FL_LAG_PKT_NUMBER_MASK;
+
+	return lag->pkt_num;
+}
+
+static void nfp_fl_increment_version(struct nfp_fl_lag *lag)
+{
+	/* LSB is not considered by firmware so add 2 for each increment. */
+	lag->batch_ver += 2;
+	lag->batch_ver &= NFP_FL_LAG_VERSION_MASK;
+
+	/* Zero is reserved by firmware. */
+	if (!lag->batch_ver)
+		lag->batch_ver += 2;
+}
+
+static struct nfp_fl_lag_group *
+nfp_fl_lag_group_create(struct nfp_fl_lag *lag, struct net_device *master)
+{
+	struct nfp_fl_lag_group *group;
+	struct nfp_flower_priv *priv;
+	int id;
+
+	priv = container_of(lag, struct nfp_flower_priv, nfp_lag);
+
+	id = ida_simple_get(&lag->ida_handle, NFP_FL_LAG_GROUP_MIN,
+			    NFP_FL_LAG_GROUP_MAX, GFP_KERNEL);
+	if (id < 0) {
+		nfp_flower_cmsg_warn(priv->app,
+				     "No more bonding groups available\n");
+		return ERR_PTR(id);
+	}
+
+	group = kmalloc(sizeof(*group), GFP_KERNEL);
+	if (!group) {
+		ida_simple_remove(&lag->ida_handle, id);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	group->group_id = id;
+	group->master_ndev = master;
+	group->dirty = true;
+	group->offloaded = false;
+	group->to_remove = false;
+	group->to_destroy = false;
+	group->slave_cnt = 0;
+	group->group_inst = ++lag->global_inst;
+	list_add_tail(&group->list, &lag->group_list);
+
+	return group;
+}
+
+static struct nfp_fl_lag_group *
+nfp_fl_lag_find_group_for_master_with_lag(struct nfp_fl_lag *lag,
+					  struct net_device *master)
+{
+	struct nfp_fl_lag_group *entry;
+
+	if (!master)
+		return NULL;
+
+	list_for_each_entry(entry, &lag->group_list, list)
+		if (entry->master_ndev == master)
+			return entry;
+
+	return NULL;
+}
+
+int nfp_flower_lag_populate_pre_action(struct nfp_app *app,
+				       struct net_device *master,
+				       struct nfp_fl_pre_lag *pre_act)
+{
+	struct nfp_flower_priv *priv = app->priv;
+	struct nfp_fl_lag_group *group = NULL;
+	__be32 temp_vers;
+
+	mutex_lock(&priv->nfp_lag.lock);
+	group = nfp_fl_lag_find_group_for_master_with_lag(&priv->nfp_lag,
+							  master);
+	if (!group) {
+		mutex_unlock(&priv->nfp_lag.lock);
+		return -ENOENT;
+	}
+
+	pre_act->group_id = cpu_to_be16(group->group_id);
+	temp_vers = cpu_to_be32(priv->nfp_lag.batch_ver <<
+				NFP_FL_PRE_LAG_VER_OFF);
+	memcpy(pre_act->lag_version, &temp_vers, 3);
+	pre_act->instance = group->group_inst;
+	mutex_unlock(&priv->nfp_lag.lock);
+
+	return 0;
+}
+
+int nfp_flower_lag_get_output_id(struct nfp_app *app, struct net_device *master)
+{
+	struct nfp_flower_priv *priv = app->priv;
+	struct nfp_fl_lag_group *group = NULL;
+	int group_id = -ENOENT;
+
+	mutex_lock(&priv->nfp_lag.lock);
+	group = nfp_fl_lag_find_group_for_master_with_lag(&priv->nfp_lag,
+							  master);
+	if (group)
+		group_id = group->group_id;
+	mutex_unlock(&priv->nfp_lag.lock);
+
+	return group_id;
+}
+
+static int
+nfp_fl_lag_config_group(struct nfp_fl_lag *lag, struct nfp_fl_lag_group *group,
+			struct net_device **active_members,
+			unsigned int member_cnt, enum nfp_fl_lag_batch *batch)
+{
+	struct nfp_flower_cmsg_lag_config *cmsg_payload;
+	struct nfp_flower_priv *priv;
+	unsigned long int flags;
+	unsigned int size, i;
+	struct sk_buff *skb;
+
+	priv = container_of(lag, struct nfp_flower_priv, nfp_lag);
+	size = sizeof(*cmsg_payload) + sizeof(__be32) * member_cnt;
+	skb = nfp_flower_cmsg_alloc(priv->app, size,
+				    NFP_FLOWER_CMSG_TYPE_LAG_CONFIG,
+				    GFP_KERNEL);
+	if (!skb)
+		return -ENOMEM;
+
+	cmsg_payload = nfp_flower_cmsg_get_data(skb);
+	flags = 0;
+
+	/* Increment batch version for each new batch of config messages. */
+	if (*batch == NFP_FL_LAG_BATCH_FIRST) {
+		flags |= NFP_FL_LAG_FIRST;
+		nfp_fl_increment_version(lag);
+		*batch = NFP_FL_LAG_BATCH_MEMBER;
+	}
+
+	/* If it is a reset msg then it is also the end of the batch. */
+	if (lag->rst_cfg) {
+		flags |= NFP_FL_LAG_RESET;
+		*batch = NFP_FL_LAG_BATCH_FINISHED;
+	}
+
+	/* To signal the end of a batch, both the switch and last flags are set
+	 * and the the reserved SYNC group ID is used.
+	 */
+	if (*batch == NFP_FL_LAG_BATCH_FINISHED) {
+		flags |= NFP_FL_LAG_SWITCH | NFP_FL_LAG_LAST;
+		lag->rst_cfg = false;
+		cmsg_payload->group_id = cpu_to_be32(NFP_FL_LAG_SYNC_ID);
+		cmsg_payload->group_inst = 0;
+	} else {
+		cmsg_payload->group_id = cpu_to_be32(group->group_id);
+		cmsg_payload->group_inst = cpu_to_be32(group->group_inst);
+	}
+
+	cmsg_payload->reserved[0] = 0;
+	cmsg_payload->reserved[1] = 0;
+	cmsg_payload->ttl = NFP_FL_LAG_HOST_TTL;
+	cmsg_payload->ctrl_flags = flags;
+	cmsg_payload->batch_ver = cpu_to_be32(lag->batch_ver);
+	cmsg_payload->pkt_number = cpu_to_be32(nfp_fl_get_next_pkt_number(lag));
+
+	for (i = 0; i < member_cnt; i++)
+		cmsg_payload->members[i] =
+			cpu_to_be32(nfp_repr_get_port_id(active_members[i]));
+
+	nfp_ctrl_tx(priv->app->ctrl, skb);
+	return 0;
+}
+
+static void nfp_fl_lag_do_work(struct work_struct *work)
+{
+	enum nfp_fl_lag_batch batch = NFP_FL_LAG_BATCH_FIRST;
+	struct nfp_fl_lag_group *entry, *storage;
+	struct delayed_work *delayed_work;
+	struct nfp_flower_priv *priv;
+	struct nfp_fl_lag *lag;
+	int err;
+
+	delayed_work = to_delayed_work(work);
+	lag = container_of(delayed_work, struct nfp_fl_lag, work);
+	priv = container_of(lag, struct nfp_flower_priv, nfp_lag);
+
+	mutex_lock(&lag->lock);
+	list_for_each_entry_safe(entry, storage, &lag->group_list, list) {
+		struct net_device *iter_netdev, **acti_netdevs;
+		struct nfp_flower_repr_priv *repr_priv;
+		int active_count = 0, slaves = 0;
+		struct nfp_repr *repr;
+		unsigned long *flags;
+
+		if (entry->to_remove) {
+			/* Active count of 0 deletes group on hw. */
+			err = nfp_fl_lag_config_group(lag, entry, NULL, 0,
+						      &batch);
+			if (!err) {
+				entry->to_remove = false;
+				entry->offloaded = false;
+			} else {
+				nfp_flower_cmsg_warn(priv->app,
+						     "group delete failed\n");
+				schedule_delayed_work(&lag->work,
+						      NFP_FL_LAG_DELAY);
+				continue;
+			}
+
+			if (entry->to_destroy) {
+				ida_simple_remove(&lag->ida_handle,
+						  entry->group_id);
+				list_del(&entry->list);
+				kfree(entry);
+			}
+			continue;
+		}
+
+		acti_netdevs = kmalloc_array(entry->slave_cnt,
+					     sizeof(*acti_netdevs), GFP_KERNEL);
+
+		/* Include sanity check in the loop. It may be that a bond has
+		 * changed between processing the last notification and the
+		 * work queue triggering. If the number of slaves has changed
+		 * or it now contains netdevs that cannot be offloaded, ignore
+		 * the group until pending notifications are processed.
+		 */
+		rcu_read_lock();
+		for_each_netdev_in_bond_rcu(entry->master_ndev, iter_netdev) {
+			if (!nfp_netdev_is_nfp_repr(iter_netdev)) {
+				slaves = 0;
+				break;
+			}
+
+			repr = netdev_priv(iter_netdev);
+
+			if (repr->app != priv->app) {
+				slaves = 0;
+				break;
+			}
+
+			slaves++;
+			if (slaves > entry->slave_cnt)
+				break;
+
+			/* Check the ports for state changes. */
+			repr_priv = repr->app_priv;
+			flags = &repr_priv->lag_port_flags;
+
+			if (*flags & NFP_PORT_LAG_CHANGED) {
+				*flags &= ~NFP_PORT_LAG_CHANGED;
+				entry->dirty = true;
+			}
+
+			if ((*flags & NFP_PORT_LAG_TX_ENABLED) &&
+			    (*flags & NFP_PORT_LAG_LINK_UP))
+				acti_netdevs[active_count++] = iter_netdev;
+		}
+		rcu_read_unlock();
+
+		if (slaves != entry->slave_cnt || !entry->dirty) {
+			kfree(acti_netdevs);
+			continue;
+		}
+
+		err = nfp_fl_lag_config_group(lag, entry, acti_netdevs,
+					      active_count, &batch);
+		if (!err) {
+			entry->offloaded = true;
+			entry->dirty = false;
+		} else {
+			nfp_flower_cmsg_warn(priv->app,
+					     "group offload failed\n");
+			schedule_delayed_work(&lag->work, NFP_FL_LAG_DELAY);
+		}
+
+		kfree(acti_netdevs);
+	}
+
+	/* End the config batch if at least one packet has been batched. */
+	if (batch == NFP_FL_LAG_BATCH_MEMBER) {
+		batch = NFP_FL_LAG_BATCH_FINISHED;
+		err = nfp_fl_lag_config_group(lag, NULL, NULL, 0, &batch);
+		if (err)
+			nfp_flower_cmsg_warn(priv->app,
+					     "group batch end cmsg failed\n");
+	}
+
+	mutex_unlock(&lag->lock);
+}
+
+static int
+nfp_fl_lag_put_unprocessed(struct nfp_fl_lag *lag, struct sk_buff *skb)
+{
+	struct nfp_flower_cmsg_lag_config *cmsg_payload;
+
+	cmsg_payload = nfp_flower_cmsg_get_data(skb);
+	if (be32_to_cpu(cmsg_payload->group_id) >= NFP_FL_LAG_GROUP_MAX)
+		return -EINVAL;
+
+	/* Drop cmsg retrans if storage limit is exceeded to prevent
+	 * overloading. If the fw notices that expected messages have not been
+	 * received in a given time block, it will request a full resync.
+	 */
+	if (skb_queue_len(&lag->retrans_skbs) >= NFP_FL_LAG_RETRANS_LIMIT)
+		return -ENOSPC;
+
+	__skb_queue_tail(&lag->retrans_skbs, skb);
+
+	return 0;
+}
+
+static void nfp_fl_send_unprocessed(struct nfp_fl_lag *lag)
+{
+	struct nfp_flower_priv *priv;
+	struct sk_buff *skb;
+
+	priv = container_of(lag, struct nfp_flower_priv, nfp_lag);
+
+	while ((skb = __skb_dequeue(&lag->retrans_skbs)))
+		nfp_ctrl_tx(priv->app->ctrl, skb);
+}
+
+bool nfp_flower_lag_unprocessed_msg(struct nfp_app *app, struct sk_buff *skb)
+{
+	struct nfp_flower_cmsg_lag_config *cmsg_payload;
+	struct nfp_flower_priv *priv = app->priv;
+	struct nfp_fl_lag_group *group_entry;
+	unsigned long int flags;
+	bool store_skb = false;
+	int err;
+
+	cmsg_payload = nfp_flower_cmsg_get_data(skb);
+	flags = cmsg_payload->ctrl_flags;
+
+	/* Note the intentional fall through below. If DATA and XON are both
+	 * set, the message will stored and sent again with the rest of the
+	 * unprocessed messages list.
+	 */
+
+	/* Store */
+	if (flags & NFP_FL_LAG_DATA)
+		if (!nfp_fl_lag_put_unprocessed(&priv->nfp_lag, skb))
+			store_skb = true;
+
+	/* Send stored */
+	if (flags & NFP_FL_LAG_XON)
+		nfp_fl_send_unprocessed(&priv->nfp_lag);
+
+	/* Resend all */
+	if (flags & NFP_FL_LAG_SYNC) {
+		/* To resend all config:
+		 * 1) Clear all unprocessed messages
+		 * 2) Mark all groups dirty
+		 * 3) Reset NFP group config
+		 * 4) Schedule a LAG config update
+		 */
+
+		__skb_queue_purge(&priv->nfp_lag.retrans_skbs);
+
+		mutex_lock(&priv->nfp_lag.lock);
+		list_for_each_entry(group_entry, &priv->nfp_lag.group_list,
+				    list)
+			group_entry->dirty = true;
+
+		err = nfp_flower_lag_reset(&priv->nfp_lag);
+		if (err)
+			nfp_flower_cmsg_warn(priv->app,
+					     "mem err in group reset msg\n");
+		mutex_unlock(&priv->nfp_lag.lock);
+
+		schedule_delayed_work(&priv->nfp_lag.work, 0);
+	}
+
+	return store_skb;
+}
+
+static void
+nfp_fl_lag_schedule_group_remove(struct nfp_fl_lag *lag,
+				 struct nfp_fl_lag_group *group)
+{
+	group->to_remove = true;
+
+	schedule_delayed_work(&lag->work, NFP_FL_LAG_DELAY);
+}
+
+static int
+nfp_fl_lag_schedule_group_delete(struct nfp_fl_lag *lag,
+				 struct net_device *master)
+{
+	struct nfp_fl_lag_group *group;
+
+	mutex_lock(&lag->lock);
+	group = nfp_fl_lag_find_group_for_master_with_lag(lag, master);
+	if (!group) {
+		mutex_unlock(&lag->lock);
+		return -ENOENT;
+	}
+
+	group->to_remove = true;
+	group->to_destroy = true;
+	mutex_unlock(&lag->lock);
+
+	schedule_delayed_work(&lag->work, NFP_FL_LAG_DELAY);
+	return 0;
+}
+
+static int
+nfp_fl_lag_changeupper_event(struct nfp_fl_lag *lag,
+			     struct netdev_notifier_changeupper_info *info)
+{
+	struct net_device *upper = info->upper_dev, *iter_netdev;
+	struct netdev_lag_upper_info *lag_upper_info;
+	struct nfp_fl_lag_group *group;
+	struct nfp_flower_priv *priv;
+	unsigned int slave_count = 0;
+	bool can_offload = true;
+	struct nfp_repr *repr;
+
+	if (!netif_is_lag_master(upper))
+		return 0;
+
+	priv = container_of(lag, struct nfp_flower_priv, nfp_lag);
+
+	rcu_read_lock();
+	for_each_netdev_in_bond_rcu(upper, iter_netdev) {
+		if (!nfp_netdev_is_nfp_repr(iter_netdev)) {
+			can_offload = false;
+			break;
+		}
+		repr = netdev_priv(iter_netdev);
+
+		/* Ensure all ports are created by the same app/on same card. */
+		if (repr->app != priv->app) {
+			can_offload = false;
+			break;
+		}
+
+		slave_count++;
+	}
+	rcu_read_unlock();
+
+	lag_upper_info = info->upper_info;
+
+	/* Firmware supports active/backup and L3/L4 hash bonds. */
+	if (lag_upper_info &&
+	    lag_upper_info->tx_type != NETDEV_LAG_TX_TYPE_ACTIVEBACKUP &&
+	    (lag_upper_info->tx_type != NETDEV_LAG_TX_TYPE_HASH ||
+	    (lag_upper_info->hash_type != NETDEV_LAG_HASH_L34 &&
+	    lag_upper_info->hash_type != NETDEV_LAG_HASH_E34))) {
+		can_offload = false;
+		nfp_flower_cmsg_warn(priv->app,
+				     "Unable to offload tx_type %u hash %u\n",
+				     lag_upper_info->tx_type,
+				     lag_upper_info->hash_type);
+	}
+
+	mutex_lock(&lag->lock);
+	group = nfp_fl_lag_find_group_for_master_with_lag(lag, upper);
+
+	if (slave_count == 0 || !can_offload) {
+		/* Cannot offload the group - remove if previously offloaded. */
+		if (group && group->offloaded)
+			nfp_fl_lag_schedule_group_remove(lag, group);
+
+		mutex_unlock(&lag->lock);
+		return 0;
+	}
+
+	if (!group) {
+		group = nfp_fl_lag_group_create(lag, upper);
+		if (IS_ERR(group)) {
+			mutex_unlock(&lag->lock);
+			return PTR_ERR(group);
+		}
+	}
+
+	group->dirty = true;
+	group->slave_cnt = slave_count;
+
+	/* Group may have been on queue for removal but is now offfloable. */
+	group->to_remove = false;
+	mutex_unlock(&lag->lock);
+
+	schedule_delayed_work(&lag->work, NFP_FL_LAG_DELAY);
+	return 0;
+}
+
+static int
+nfp_fl_lag_changels_event(struct nfp_fl_lag *lag, struct net_device *netdev,
+			  struct netdev_notifier_changelowerstate_info *info)
+{
+	struct netdev_lag_lower_state_info *lag_lower_info;
+	struct nfp_flower_repr_priv *repr_priv;
+	struct nfp_flower_priv *priv;
+	struct nfp_repr *repr;
+	unsigned long *flags;
+
+	if (!netif_is_lag_port(netdev) || !nfp_netdev_is_nfp_repr(netdev))
+		return 0;
+
+	lag_lower_info = info->lower_state_info;
+	if (!lag_lower_info)
+		return 0;
+
+	priv = container_of(lag, struct nfp_flower_priv, nfp_lag);
+	repr = netdev_priv(netdev);
+
+	/* Verify that the repr is associated with this app. */
+	if (repr->app != priv->app)
+		return 0;
+
+	repr_priv = repr->app_priv;
+	flags = &repr_priv->lag_port_flags;
+
+	mutex_lock(&lag->lock);
+	if (lag_lower_info->link_up)
+		*flags |= NFP_PORT_LAG_LINK_UP;
+	else
+		*flags &= ~NFP_PORT_LAG_LINK_UP;
+
+	if (lag_lower_info->tx_enabled)
+		*flags |= NFP_PORT_LAG_TX_ENABLED;
+	else
+		*flags &= ~NFP_PORT_LAG_TX_ENABLED;
+
+	*flags |= NFP_PORT_LAG_CHANGED;
+	mutex_unlock(&lag->lock);
+
+	schedule_delayed_work(&lag->work, NFP_FL_LAG_DELAY);
+	return 0;
+}
+
+static int
+nfp_fl_lag_netdev_event(struct notifier_block *nb, unsigned long event,
+			void *ptr)
+{
+	struct net_device *netdev;
+	struct nfp_fl_lag *lag;
+	int err;
+
+	netdev = netdev_notifier_info_to_dev(ptr);
+	lag = container_of(nb, struct nfp_fl_lag, lag_nb);
+
+	switch (event) {
+	case NETDEV_CHANGEUPPER:
+		err = nfp_fl_lag_changeupper_event(lag, ptr);
+		if (err)
+			return NOTIFY_BAD;
+		return NOTIFY_OK;
+	case NETDEV_CHANGELOWERSTATE:
+		err = nfp_fl_lag_changels_event(lag, netdev, ptr);
+		if (err)
+			return NOTIFY_BAD;
+		return NOTIFY_OK;
+	case NETDEV_UNREGISTER:
+		if (netif_is_bond_master(netdev)) {
+			err = nfp_fl_lag_schedule_group_delete(lag, netdev);
+			if (err)
+				return NOTIFY_BAD;
+			return NOTIFY_OK;
+		}
+	}
+
+	return NOTIFY_DONE;
+}
+
+int nfp_flower_lag_reset(struct nfp_fl_lag *lag)
+{
+	enum nfp_fl_lag_batch batch = NFP_FL_LAG_BATCH_FIRST;
+
+	lag->rst_cfg = true;
+	return nfp_fl_lag_config_group(lag, NULL, NULL, 0, &batch);
+}
+
+void nfp_flower_lag_init(struct nfp_fl_lag *lag)
+{
+	INIT_DELAYED_WORK(&lag->work, nfp_fl_lag_do_work);
+	INIT_LIST_HEAD(&lag->group_list);
+	mutex_init(&lag->lock);
+	ida_init(&lag->ida_handle);
+
+	__skb_queue_head_init(&lag->retrans_skbs);
+
+	/* 0 is a reserved batch version so increment to first valid value. */
+	nfp_fl_increment_version(lag);
+
+	lag->lag_nb.notifier_call = nfp_fl_lag_netdev_event;
+}
+
+void nfp_flower_lag_cleanup(struct nfp_fl_lag *lag)
+{
+	struct nfp_fl_lag_group *entry, *storage;
+
+	cancel_delayed_work_sync(&lag->work);
+
+	__skb_queue_purge(&lag->retrans_skbs);
+
+	/* Remove all groups. */
+	mutex_lock(&lag->lock);
+	list_for_each_entry_safe(entry, storage, &lag->group_list, list) {
+		list_del(&entry->list);
+		kfree(entry);
+	}
+	mutex_unlock(&lag->lock);
+	mutex_destroy(&lag->lock);
+	ida_destroy(&lag->ida_handle);
+}