Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 723 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 000000000..88d6d992e
--- /dev/null
+++ b/drivers/net/ethernet/netronome/nfp/flower/lag_conf.c
@@ -0,0 +1,723 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/* Copyright (C) 2018 Netronome Systems, Inc. */
+
+#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;
+}
+
+static int nfp_fl_lag_get_group_info(struct nfp_app *app,
+				     struct net_device *netdev,
+				     __be16 *group_id,
+				     u8 *batch_ver,
+				     u8 *group_inst)
+{
+	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,
+							  netdev);
+	if (!group) {
+		mutex_unlock(&priv->nfp_lag.lock);
+		return -ENOENT;
+	}
+
+	if (group_id)
+		*group_id = cpu_to_be16(group->group_id);
+
+	if (batch_ver) {
+		temp_vers = cpu_to_be32(priv->nfp_lag.batch_ver <<
+					NFP_FL_PRE_LAG_VER_OFF);
+		memcpy(batch_ver, &temp_vers, 3);
+	}
+
+	if (group_inst)
+		*group_inst = group->group_inst;
+
+	mutex_unlock(&priv->nfp_lag.lock);
+
+	return 0;
+}
+
+int nfp_flower_lag_populate_pre_action(struct nfp_app *app,
+				       struct net_device *master,
+				       struct nfp_fl_pre_lag *pre_act,
+				       struct netlink_ext_ack *extack)
+{
+	if (nfp_fl_lag_get_group_info(app, master, &pre_act->group_id,
+				      pre_act->lag_version,
+				      &pre_act->instance)) {
+		NL_SET_ERR_MSG_MOD(extack, "invalid entry: group does not exist for LAG action");
+		return -ENOENT;
+	}
+
+	return 0;
+}
+
+void nfp_flower_lag_get_info_from_netdev(struct nfp_app *app,
+					 struct net_device *netdev,
+					 struct nfp_tun_neigh_lag *lag)
+{
+	nfp_fl_lag_get_group_info(app, netdev, NULL,
+				  lag->lag_version, &lag->lag_instance);
+}
+
+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 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 void
+nfp_fl_lag_schedule_group_delete(struct nfp_fl_lag *lag,
+				 struct net_device *master)
+{
+	struct nfp_fl_lag_group *group;
+	struct nfp_flower_priv *priv;
+
+	priv = container_of(lag, struct nfp_flower_priv, nfp_lag);
+
+	if (!netif_is_bond_master(master))
+		return;
+
+	mutex_lock(&lag->lock);
+	group = nfp_fl_lag_find_group_for_master_with_lag(lag, master);
+	if (!group) {
+		mutex_unlock(&lag->lock);
+		nfp_warn(priv->app->cpp, "untracked bond got unregistered %s\n",
+			 netdev_name(master));
+		return;
+	}
+
+	group->to_remove = true;
+	group->to_destroy = true;
+	mutex_unlock(&lag->lock);
+
+	schedule_delayed_work(&lag->work, NFP_FL_LAG_DELAY);
+}
+
+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 &&
+	      lag_upper_info->hash_type != NETDEV_LAG_HASH_UNKNOWN))) {
+		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 offloadable. */
+	group->to_remove = false;
+	mutex_unlock(&lag->lock);
+
+	schedule_delayed_work(&lag->work, NFP_FL_LAG_DELAY);
+	return 0;
+}
+
+static void
+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;
+
+	lag_lower_info = info->lower_state_info;
+	if (!lag_lower_info)
+		return;
+
+	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;
+
+	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);
+}
+
+int nfp_flower_lag_netdev_event(struct nfp_flower_priv *priv,
+				struct net_device *netdev,
+				unsigned long event, void *ptr)
+{
+	struct nfp_fl_lag *lag = &priv->nfp_lag;
+	int err;
+
+	switch (event) {
+	case NETDEV_CHANGEUPPER:
+		err = nfp_fl_lag_changeupper_event(lag, ptr);
+		if (err)
+			return NOTIFY_BAD;
+		return NOTIFY_OK;
+	case NETDEV_CHANGELOWERSTATE:
+		nfp_fl_lag_changels_event(lag, netdev, ptr);
+		return NOTIFY_OK;
+	case NETDEV_UNREGISTER:
+		nfp_fl_lag_schedule_group_delete(lag, netdev);
+		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);
+}
+
+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);
+}