Merge branch 'ionic-next'

Shannon Nelson says:

====================
ionic: queue and filter mgmt updates

After a pair of simple code cleanups, we change the mac filter
management to split the updates between the driver's filter
list and the device's filter list so that we can keep the calls
to dev_uc_sync() and dev_mc_sync() under the netif_addr_lock
in ndo_set_rx_mode, and then sync the driver's list to the
device later in the rx_mode work task.
====================

Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/pensando/ionic/ionic_dev.c

···
 {
 	struct ionic *ionic = from_timer(ionic, t, watchdog_timer);
 	struct ionic_lif *lif = ionic->lif;
+	struct ionic_deferred_work *work;
 	int hb;
 
 	mod_timer(&ionic->watchdog_timer,
···
 	if (hb >= 0 &&
 	    !test_bit(IONIC_LIF_F_FW_RESET, lif->state))
 		ionic_link_status_check_request(lif, CAN_NOT_SLEEP);
+
+	if (test_bit(IONIC_LIF_F_FILTER_SYNC_NEEDED, lif->state)) {
+		work = kzalloc(sizeof(*work), GFP_ATOMIC);
+		if (!work) {
+			netdev_err(lif->netdev, "rxmode change dropped\n");
+			return;
+		}
+
+		work->type = IONIC_DW_TYPE_RX_MODE;
+		netdev_dbg(lif->netdev, "deferred: rx_mode\n");
+		ionic_lif_deferred_enqueue(&lif->deferred, work);
+	}
 }
 
 void ionic_init_devinfo(struct ionic *ionic)

drivers/net/ethernet/pensando/ionic/ionic_lif.c

···
 				      */
 };
 
-static void ionic_lif_rx_mode(struct ionic_lif *lif);
-static int ionic_lif_addr_add(struct ionic_lif *lif, const u8 *addr);
-static int ionic_lif_addr_del(struct ionic_lif *lif, const u8 *addr);
 static void ionic_link_status_check(struct ionic_lif *lif);
 static void ionic_lif_handle_fw_down(struct ionic_lif *lif);
 static void ionic_lif_handle_fw_up(struct ionic_lif *lif);
···
 		switch (w->type) {
 		case IONIC_DW_TYPE_RX_MODE:
 			ionic_lif_rx_mode(lif);
-			break;
-		case IONIC_DW_TYPE_RX_ADDR_ADD:
-			ionic_lif_addr_add(lif, w->addr);
-			break;
-		case IONIC_DW_TYPE_RX_ADDR_DEL:
-			ionic_lif_addr_del(lif, w->addr);
 			break;
 		case IONIC_DW_TYPE_LINK_STATUS:
 			ionic_link_status_check(lif);
···
 	if (err && err != -EEXIST)
 		return err;
 
-	return ionic_rx_filter_save(lif, 0, qid, 0, &ctx);
+	spin_lock_bh(&lif->rx_filters.lock);
+	err = ionic_rx_filter_save(lif, 0, qid, 0, &ctx, IONIC_FILTER_STATE_SYNCED);
+	spin_unlock_bh(&lif->rx_filters.lock);
+
+	return err;
 }
 
 int ionic_lif_set_hwstamp_rxfilt(struct ionic_lif *lif, u64 pkt_class)
···
 	ns->tx_errors = ns->tx_aborted_errors;
 }
 
-static int ionic_lif_addr_add(struct ionic_lif *lif, const u8 *addr)
+int ionic_lif_addr_add(struct ionic_lif *lif, const u8 *addr)
 {
 	struct ionic_admin_ctx ctx = {
 		.work = COMPLETION_INITIALIZER_ONSTACK(ctx.work),
···
 			.match = cpu_to_le16(IONIC_RX_FILTER_MATCH_MAC),
 		},
 	};
+	int nfilters = le32_to_cpu(lif->identity->eth.max_ucast_filters);
+	bool mc = is_multicast_ether_addr(addr);
 	struct ionic_rx_filter *f;
-	int err;
+	int err = 0;
 
-	/* don't bother if we already have it */
 	spin_lock_bh(&lif->rx_filters.lock);
 	f = ionic_rx_filter_by_addr(lif, addr);
+	if (f) {
+		/* don't bother if we already have it and it is sync'd */
+		if (f->state == IONIC_FILTER_STATE_SYNCED) {
+			spin_unlock_bh(&lif->rx_filters.lock);
+			return 0;
+		}
+
+		/* mark preemptively as sync'd to block any parallel attempts */
+		f->state = IONIC_FILTER_STATE_SYNCED;
+	} else {
+		/* save as SYNCED to catch any DEL requests while processing */
+		memcpy(ctx.cmd.rx_filter_add.mac.addr, addr, ETH_ALEN);
+		err = ionic_rx_filter_save(lif, 0, IONIC_RXQ_INDEX_ANY, 0, &ctx,
+					   IONIC_FILTER_STATE_SYNCED);
+	}
 	spin_unlock_bh(&lif->rx_filters.lock);
-	if (f)
-		return 0;
+	if (err)
+		return err;
 
 	netdev_dbg(lif->netdev, "rx_filter add ADDR %pM\n", addr);
 
-	memcpy(ctx.cmd.rx_filter_add.mac.addr, addr, ETH_ALEN);
-	err = ionic_adminq_post_wait(lif, &ctx);
-	if (err && err != -EEXIST)
-		return err;
+	/* Don't bother with the write to FW if we know there's no room,
+	 * we can try again on the next sync attempt.
+	 */
+	if ((lif->nucast + lif->nmcast) >= nfilters)
+		err = -ENOSPC;
+	else
+		err = ionic_adminq_post_wait(lif, &ctx);
 
-	return ionic_rx_filter_save(lif, 0, IONIC_RXQ_INDEX_ANY, 0, &ctx);
+	spin_lock_bh(&lif->rx_filters.lock);
+	if (err && err != -EEXIST) {
+		/* set the state back to NEW so we can try again later */
+		f = ionic_rx_filter_by_addr(lif, addr);
+		if (f && f->state == IONIC_FILTER_STATE_SYNCED)
+			f->state = IONIC_FILTER_STATE_NEW;
+
+		spin_unlock_bh(&lif->rx_filters.lock);
+
+		if (err == -ENOSPC)
+			return 0;
+		else
+			return err;
+	}
+
+	if (mc)
+		lif->nmcast++;
+	else
+		lif->nucast++;
+
+	f = ionic_rx_filter_by_addr(lif, addr);
+	if (f && f->state == IONIC_FILTER_STATE_OLD) {
+		/* Someone requested a delete while we were adding
+		 * so update the filter info with the results from the add
+		 * and the data will be there for the delete on the next
+		 * sync cycle.
+		 */
+		err = ionic_rx_filter_save(lif, 0, IONIC_RXQ_INDEX_ANY, 0, &ctx,
+					   IONIC_FILTER_STATE_OLD);
+	} else {
+		err = ionic_rx_filter_save(lif, 0, IONIC_RXQ_INDEX_ANY, 0, &ctx,
+					   IONIC_FILTER_STATE_SYNCED);
+	}
+
+	spin_unlock_bh(&lif->rx_filters.lock);
+
+	return err;
 }
 
-static int ionic_lif_addr_del(struct ionic_lif *lif, const u8 *addr)
+int ionic_lif_addr_del(struct ionic_lif *lif, const u8 *addr)
 {
 	struct ionic_admin_ctx ctx = {
 		.work = COMPLETION_INITIALIZER_ONSTACK(ctx.work),
···
 		},
 	};
 	struct ionic_rx_filter *f;
+	int state;
 	int err;
 
 	spin_lock_bh(&lif->rx_filters.lock);
···
 	netdev_dbg(lif->netdev, "rx_filter del ADDR %pM (id %d)\n",
 		   addr, f->filter_id);
 
+	state = f->state;
 	ctx.cmd.rx_filter_del.filter_id = cpu_to_le32(f->filter_id);
 	ionic_rx_filter_free(lif, f);
+
+	if (is_multicast_ether_addr(addr) && lif->nmcast)
+		lif->nmcast--;
+	else if (!is_multicast_ether_addr(addr) && lif->nucast)
+		lif->nucast--;
+
 	spin_unlock_bh(&lif->rx_filters.lock);
 
-	err = ionic_adminq_post_wait(lif, &ctx);
-	if (err && err != -EEXIST)
-		return err;
-
-	return 0;
-}
-
-static int ionic_lif_addr(struct ionic_lif *lif, const u8 *addr, bool add)
-{
-	unsigned int nmfilters;
-	unsigned int nufilters;
-
-	if (add) {
-		/* Do we have space for this filter?  We test the counters
-		 * here before checking the need for deferral so that we
-		 * can return an overflow error to the stack.
-		 */
-		nmfilters = le32_to_cpu(lif->identity->eth.max_mcast_filters);
-		nufilters = le32_to_cpu(lif->identity->eth.max_ucast_filters);
-
-		if ((is_multicast_ether_addr(addr) && lif->nmcast < nmfilters))
-			lif->nmcast++;
-		else if (!is_multicast_ether_addr(addr) &&
-			 lif->nucast < nufilters)
-			lif->nucast++;
-		else
-			return -ENOSPC;
-	} else {
-		if (is_multicast_ether_addr(addr) && lif->nmcast)
-			lif->nmcast--;
-		else if (!is_multicast_ether_addr(addr) && lif->nucast)
-			lif->nucast--;
+	if (state != IONIC_FILTER_STATE_NEW) {
+		err = ionic_adminq_post_wait(lif, &ctx);
+		if (err && err != -EEXIST)
+			return err;
 	}
-
-	netdev_dbg(lif->netdev, "rx_filter %s %pM\n",
-		   add ? "add" : "del", addr);
-	if (add)
-		return ionic_lif_addr_add(lif, addr);
-	else
-		return ionic_lif_addr_del(lif, addr);
 
 	return 0;
 }
 
 static int ionic_addr_add(struct net_device *netdev, const u8 *addr)
 {
-	return ionic_lif_addr(netdev_priv(netdev), addr, ADD_ADDR);
+	return ionic_lif_list_addr(netdev_priv(netdev), addr, ADD_ADDR);
 }
 
 static int ionic_addr_del(struct net_device *netdev, const u8 *addr)
 {
-	return ionic_lif_addr(netdev_priv(netdev), addr, DEL_ADDR);
+	return ionic_lif_list_addr(netdev_priv(netdev), addr, DEL_ADDR);
 }
 
-static void ionic_lif_rx_mode(struct ionic_lif *lif)
+void ionic_lif_rx_mode(struct ionic_lif *lif)
 {
 	struct net_device *netdev = lif->netdev;
 	unsigned int nfilters;
···
 	rx_mode |= (nd_flags & IFF_PROMISC) ? IONIC_RX_MODE_F_PROMISC : 0;
 	rx_mode |= (nd_flags & IFF_ALLMULTI) ? IONIC_RX_MODE_F_ALLMULTI : 0;
 
-	/* sync unicast addresses
-	 * next check to see if we're in an overflow state
+	/* sync the mac filters */
+	ionic_rx_filter_sync(lif);
+
+	/* check for overflow state
 	 *    if so, we track that we overflowed and enable NIC PROMISC
 	 *    else if the overflow is set and not needed
 	 *       we remove our overflow flag and check the netdev flags
 	 *       to see if we can disable NIC PROMISC
 	 */
-	__dev_uc_sync(netdev, ionic_addr_add, ionic_addr_del);
 	nfilters = le32_to_cpu(lif->identity->eth.max_ucast_filters);
-	if (netdev_uc_count(netdev) + 1 > nfilters) {
+	if ((lif->nucast + lif->nmcast) >= nfilters) {
 		rx_mode |= IONIC_RX_MODE_F_PROMISC;
+		rx_mode |= IONIC_RX_MODE_F_ALLMULTI;
 		lif->uc_overflow = true;
+		lif->mc_overflow = true;
 	} else if (lif->uc_overflow) {
 		lif->uc_overflow = false;
+		lif->mc_overflow = false;
 		if (!(nd_flags & IFF_PROMISC))
 			rx_mode &= ~IONIC_RX_MODE_F_PROMISC;
-	}
-
-	/* same for multicast */
-	__dev_mc_sync(netdev, ionic_addr_add, ionic_addr_del);
-	nfilters = le32_to_cpu(lif->identity->eth.max_mcast_filters);
-	if (netdev_mc_count(netdev) > nfilters) {
-		rx_mode |= IONIC_RX_MODE_F_ALLMULTI;
-		lif->mc_overflow = true;
-	} else if (lif->mc_overflow) {
-		lif->mc_overflow = false;
 		if (!(nd_flags & IFF_ALLMULTI))
 			rx_mode &= ~IONIC_RX_MODE_F_ALLMULTI;
 	}
···
 	mutex_unlock(&lif->config_lock);
 }
 
-static void ionic_set_rx_mode(struct net_device *netdev, bool can_sleep)
+static void ionic_ndo_set_rx_mode(struct net_device *netdev)
 {
 	struct ionic_lif *lif = netdev_priv(netdev);
 	struct ionic_deferred_work *work;
 
-	if (!can_sleep) {
-		work = kzalloc(sizeof(*work), GFP_ATOMIC);
-		if (!work) {
-			netdev_err(lif->netdev, "rxmode change dropped\n");
-			return;
-		}
-		work->type = IONIC_DW_TYPE_RX_MODE;
-		netdev_dbg(lif->netdev, "deferred: rx_mode\n");
-		ionic_lif_deferred_enqueue(&lif->deferred, work);
-	} else {
-		ionic_lif_rx_mode(lif);
-	}
-}
+	/* Sync the kernel filter list with the driver filter list */
+	__dev_uc_sync(netdev, ionic_addr_add, ionic_addr_del);
+	__dev_mc_sync(netdev, ionic_addr_add, ionic_addr_del);
 
-static void ionic_ndo_set_rx_mode(struct net_device *netdev)
-{
-	ionic_set_rx_mode(netdev, CAN_NOT_SLEEP);
+	/* Shove off the rest of the rxmode work to the work task
+	 * which will include syncing the filters to the firmware.
+	 */
+	work = kzalloc(sizeof(*work), GFP_ATOMIC);
+	if (!work) {
+		netdev_err(lif->netdev, "rxmode change dropped\n");
+		return;
+	}
+	work->type = IONIC_DW_TYPE_RX_MODE;
+	netdev_dbg(lif->netdev, "deferred: rx_mode\n");
+	ionic_lif_deferred_enqueue(&lif->deferred, work);
 }
 
 static __le64 ionic_netdev_features_to_nic(netdev_features_t features)
···
 	if (!is_zero_ether_addr(netdev->dev_addr)) {
 		netdev_info(netdev, "deleting mac addr %pM\n",
 			    netdev->dev_addr);
-		ionic_addr_del(netdev, netdev->dev_addr);
+		ionic_lif_addr_del(netdev_priv(netdev), netdev->dev_addr);
 	}
 
 	eth_commit_mac_addr_change(netdev, addr);
 	netdev_info(netdev, "updating mac addr %pM\n", mac);
 
-	return ionic_addr_add(netdev, mac);
+	return ionic_lif_addr_add(netdev_priv(netdev), mac);
 }
 
 static void ionic_stop_queues_reconfig(struct ionic_lif *lif)
···
 	if (err)
 		return err;
 
-	return ionic_rx_filter_save(lif, 0, IONIC_RXQ_INDEX_ANY, 0, &ctx);
+	spin_lock_bh(&lif->rx_filters.lock);
+	err = ionic_rx_filter_save(lif, 0, IONIC_RXQ_INDEX_ANY, 0, &ctx,
+				   IONIC_FILTER_STATE_SYNCED);
+	spin_unlock_bh(&lif->rx_filters.lock);
+
+	return err;
 }
 
 static int ionic_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto,
···
 	if (lif->netdev->features & NETIF_F_RXHASH)
 		ionic_lif_rss_init(lif);
 
-	ionic_set_rx_mode(lif->netdev, CAN_SLEEP);
+	ionic_lif_rx_mode(lif);
 
 	return 0;
 
···
 		 */
 		if (!ether_addr_equal(ctx.comp.lif_getattr.mac,
 				      netdev->dev_addr))
-			ionic_lif_addr(lif, netdev->dev_addr, ADD_ADDR);
+			ionic_lif_addr_add(lif, netdev->dev_addr);
 	} else {
 		/* Update the netdev mac with the device's mac */
 		memcpy(addr.sa_data, ctx.comp.lif_getattr.mac, netdev->addr_len);
···
 
 	netdev_dbg(lif->netdev, "adding station MAC addr %pM\n",
 		   netdev->dev_addr);
-	ionic_lif_addr(lif, netdev->dev_addr, ADD_ADDR);
+	ionic_lif_addr_add(lif, netdev->dev_addr);
 
 	return 0;
 }

drivers/net/ethernet/pensando/ionic/ionic_lif.h

···
 
 enum ionic_deferred_work_type {
 	IONIC_DW_TYPE_RX_MODE,
-	IONIC_DW_TYPE_RX_ADDR_ADD,
-	IONIC_DW_TYPE_RX_ADDR_DEL,
 	IONIC_DW_TYPE_LINK_STATUS,
 	IONIC_DW_TYPE_LIF_RESET,
 };
···
 	IONIC_LIF_F_SW_DEBUG_STATS,
 	IONIC_LIF_F_UP,
 	IONIC_LIF_F_LINK_CHECK_REQUESTED,
+	IONIC_LIF_F_FILTER_SYNC_NEEDED,
 	IONIC_LIF_F_FW_RESET,
 	IONIC_LIF_F_SPLIT_INTR,
 	IONIC_LIF_F_BROKEN,
···
 int ionic_lif_init(struct ionic_lif *lif);
 void ionic_lif_free(struct ionic_lif *lif);
 void ionic_lif_deinit(struct ionic_lif *lif);
+
+int ionic_lif_addr_add(struct ionic_lif *lif, const u8 *addr);
+int ionic_lif_addr_del(struct ionic_lif *lif, const u8 *addr);
+
 int ionic_lif_register(struct ionic_lif *lif);
 void ionic_lif_unregister(struct ionic_lif *lif);
 int ionic_lif_identify(struct ionic *ionic, u8 lif_type,
···
 
 int ionic_lif_rss_config(struct ionic_lif *lif, u16 types,
 			 const u8 *key, const u32 *indir);
+void ionic_lif_rx_mode(struct ionic_lif *lif);
 int ionic_reconfigure_queues(struct ionic_lif *lif,
 			     struct ionic_queue_params *qparam);
 

drivers/net/ethernet/pensando/ionic/ionic_rx_filter.c

···
 #include <linux/netdevice.h>
 #include <linux/dynamic_debug.h>
 #include <linux/etherdevice.h>
+#include <linux/list.h>
 
 #include "ionic.h"
 #include "ionic_lif.h"
···
 }
 
 int ionic_rx_filter_save(struct ionic_lif *lif, u32 flow_id, u16 rxq_index,
-			 u32 hash, struct ionic_admin_ctx *ctx)
+			 u32 hash, struct ionic_admin_ctx *ctx,
+			 enum ionic_filter_state state)
 {
 	struct device *dev = lif->ionic->dev;
 	struct ionic_rx_filter_add_cmd *ac;
-	struct ionic_rx_filter *f;
+	struct ionic_rx_filter *f = NULL;
 	struct hlist_head *head;
 	unsigned int key;
 
···
 	switch (le16_to_cpu(ac->match)) {
 	case IONIC_RX_FILTER_MATCH_VLAN:
 		key = le16_to_cpu(ac->vlan.vlan);
+		f = ionic_rx_filter_by_vlan(lif, le16_to_cpu(ac->vlan.vlan));
 		break;
 	case IONIC_RX_FILTER_MATCH_MAC:
 		key = *(u32 *)ac->mac.addr;
+		f = ionic_rx_filter_by_addr(lif, ac->mac.addr);
 		break;
 	case IONIC_RX_FILTER_MATCH_MAC_VLAN:
 		key = le16_to_cpu(ac->mac_vlan.vlan);
···
 		return -EINVAL;
 	}
 
-	f = devm_kzalloc(dev, sizeof(*f), GFP_KERNEL);
-	if (!f)
-		return -ENOMEM;
+	if (f) {
+		/* remove from current linking so we can refresh it */
+		hlist_del(&f->by_id);
+		hlist_del(&f->by_hash);
+	} else {
+		f = devm_kzalloc(dev, sizeof(*f), GFP_ATOMIC);
+		if (!f)
+			return -ENOMEM;
+	}
 
 	f->flow_id = flow_id;
 	f->filter_id = le32_to_cpu(ctx->comp.rx_filter_add.filter_id);
+	f->state = state;
 	f->rxq_index = rxq_index;
 	memcpy(&f->cmd, ac, sizeof(f->cmd));
 	netdev_dbg(lif->netdev, "rx_filter add filter_id %d\n", f->filter_id);
 
 	INIT_HLIST_NODE(&f->by_hash);
 	INIT_HLIST_NODE(&f->by_id);
-
-	spin_lock_bh(&lif->rx_filters.lock);
 
 	key = hash_32(key, IONIC_RX_FILTER_HASH_BITS);
 	head = &lif->rx_filters.by_hash[key];
···
 	key = f->filter_id & IONIC_RX_FILTER_HLISTS_MASK;
 	head = &lif->rx_filters.by_id[key];
 	hlist_add_head(&f->by_id, head);
-
-	spin_unlock_bh(&lif->rx_filters.lock);
 
 	return 0;
 }
···
 	}
 
 	return NULL;
+}
+
+int ionic_lif_list_addr(struct ionic_lif *lif, const u8 *addr, bool mode)
+{
+	struct ionic_rx_filter *f;
+	int err;
+
+	spin_lock_bh(&lif->rx_filters.lock);
+
+	f = ionic_rx_filter_by_addr(lif, addr);
+	if (mode == ADD_ADDR && !f) {
+		struct ionic_admin_ctx ctx = {
+			.work = COMPLETION_INITIALIZER_ONSTACK(ctx.work),
+			.cmd.rx_filter_add = {
+				.opcode = IONIC_CMD_RX_FILTER_ADD,
+				.lif_index = cpu_to_le16(lif->index),
+				.match = cpu_to_le16(IONIC_RX_FILTER_MATCH_MAC),
+			},
+		};
+
+		memcpy(ctx.cmd.rx_filter_add.mac.addr, addr, ETH_ALEN);
+		err = ionic_rx_filter_save(lif, 0, IONIC_RXQ_INDEX_ANY, 0, &ctx,
+					   IONIC_FILTER_STATE_NEW);
+		if (err) {
+			spin_unlock_bh(&lif->rx_filters.lock);
+			return err;
+		}
+
+	} else if (mode == ADD_ADDR && f) {
+		if (f->state == IONIC_FILTER_STATE_OLD)
+			f->state = IONIC_FILTER_STATE_SYNCED;
+
+	} else if (mode == DEL_ADDR && f) {
+		if (f->state == IONIC_FILTER_STATE_NEW)
+			ionic_rx_filter_free(lif, f);
+		else if (f->state == IONIC_FILTER_STATE_SYNCED)
+			f->state = IONIC_FILTER_STATE_OLD;
+	} else if (mode == DEL_ADDR && !f) {
+		spin_unlock_bh(&lif->rx_filters.lock);
+		return -ENOENT;
+	}
+
+	spin_unlock_bh(&lif->rx_filters.lock);
+
+	set_bit(IONIC_LIF_F_FILTER_SYNC_NEEDED, lif->state);
+
+	return 0;
+}
+
+struct sync_item {
+	struct list_head list;
+	struct ionic_rx_filter f;
+};
+
+void ionic_rx_filter_sync(struct ionic_lif *lif)
+{
+	struct device *dev = lif->ionic->dev;
+	struct list_head sync_add_list;
+	struct list_head sync_del_list;
+	struct sync_item *sync_item;
+	struct ionic_rx_filter *f;
+	struct hlist_head *head;
+	struct hlist_node *tmp;
+	struct sync_item *spos;
+	unsigned int i;
+
+	INIT_LIST_HEAD(&sync_add_list);
+	INIT_LIST_HEAD(&sync_del_list);
+
+	clear_bit(IONIC_LIF_F_FILTER_SYNC_NEEDED, lif->state);
+
+	/* Copy the filters to be added and deleted
+	 * into a separate local list that needs no locking.
+	 */
+	spin_lock_bh(&lif->rx_filters.lock);
+	for (i = 0; i < IONIC_RX_FILTER_HLISTS; i++) {
+		head = &lif->rx_filters.by_id[i];
+		hlist_for_each_entry_safe(f, tmp, head, by_id) {
+			if (f->state == IONIC_FILTER_STATE_NEW ||
+			    f->state == IONIC_FILTER_STATE_OLD) {
+				sync_item = devm_kzalloc(dev, sizeof(*sync_item),
+							 GFP_KERNEL);
+				if (!sync_item)
+					goto loop_out;
+
+				sync_item->f = *f;
+
+				if (f->state == IONIC_FILTER_STATE_NEW)
+					list_add(&sync_item->list, &sync_add_list);
+				else
+					list_add(&sync_item->list, &sync_del_list);
+			}
+		}
+	}
+loop_out:
+	spin_unlock_bh(&lif->rx_filters.lock);
+
+	/* If the add or delete fails, it won't get marked as sync'd
+	 * and will be tried again in the next sync action.
+	 * Do the deletes first in case we're in an overflow state and
+	 * they can clear room for some new filters
+	 */
+	list_for_each_entry_safe(sync_item, spos, &sync_del_list, list) {
+		(void)ionic_lif_addr_del(lif, sync_item->f.cmd.mac.addr);
+
+		list_del(&sync_item->list);
+		devm_kfree(dev, sync_item);
+	}
+
+	list_for_each_entry_safe(sync_item, spos, &sync_add_list, list) {
+		(void)ionic_lif_addr_add(lif, sync_item->f.cmd.mac.addr);
+
+		if (sync_item->f.state != IONIC_FILTER_STATE_SYNCED)
+			set_bit(IONIC_LIF_F_FILTER_SYNC_NEEDED, lif->state);
+
+		list_del(&sync_item->list);
+		devm_kfree(dev, sync_item);
+	}
 }

drivers/net/ethernet/pensando/ionic/ionic_rx_filter.h

···
 #define _IONIC_RX_FILTER_H_
 
 #define IONIC_RXQ_INDEX_ANY		(0xFFFF)
+
+enum ionic_filter_state {
+	IONIC_FILTER_STATE_SYNCED,
+	IONIC_FILTER_STATE_NEW,
+	IONIC_FILTER_STATE_OLD,
+};
+
 struct ionic_rx_filter {
 	u32 flow_id;
 	u32 filter_id;
 	u16 rxq_index;
+	enum ionic_filter_state state;
 	struct ionic_rx_filter_add_cmd cmd;
 	struct hlist_node by_hash;
 	struct hlist_node by_id;
···
 int ionic_rx_filters_init(struct ionic_lif *lif);
 void ionic_rx_filters_deinit(struct ionic_lif *lif);
 int ionic_rx_filter_save(struct ionic_lif *lif, u32 flow_id, u16 rxq_index,
-			 u32 hash, struct ionic_admin_ctx *ctx);
+			 u32 hash, struct ionic_admin_ctx *ctx,
+			 enum ionic_filter_state state);
 struct ionic_rx_filter *ionic_rx_filter_by_vlan(struct ionic_lif *lif, u16 vid);
 struct ionic_rx_filter *ionic_rx_filter_by_addr(struct ionic_lif *lif, const u8 *addr);
 struct ionic_rx_filter *ionic_rx_filter_rxsteer(struct ionic_lif *lif);
+void ionic_rx_filter_sync(struct ionic_lif *lif);
+int ionic_lif_list_addr(struct ionic_lif *lif, const u8 *addr, bool mode);
+int ionic_rx_filters_need_sync(struct ionic_lif *lif);
 
 #endif /* _IONIC_RX_FILTER_H_ */