diff mbox series

[net-next,v3,5/7] net: lan966x: Add lag support for lan966x.

Message ID 20220701205227.1337160-6-horatiu.vultur@microchip.com (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series net: lan966x: Add lag support | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 1 maintainers not CCed: linux@armlinux.org.uk
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch warning WARNING: added, moved or deleted file(s), does MAINTAINERS need updating? WARNING: line length of 81 exceeds 80 columns WARNING: line length of 82 exceeds 80 columns WARNING: line length of 83 exceeds 80 columns WARNING: line length of 84 exceeds 80 columns WARNING: line length of 85 exceeds 80 columns WARNING: line length of 89 exceeds 80 columns WARNING: line length of 90 exceeds 80 columns
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Horatiu Vultur July 1, 2022, 8:52 p.m. UTC 
Add link aggregation hardware offload support for lan966x

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
---
 .../net/ethernet/microchip/lan966x/Makefile   |   2 +-
 .../ethernet/microchip/lan966x/lan966x_lag.c  | 309 ++++++++++++++++++
 .../ethernet/microchip/lan966x/lan966x_main.h |  30 ++
 .../microchip/lan966x/lan966x_switchdev.c     |  90 +++--
 4 files changed, 411 insertions(+), 20 deletions(-)
 create mode 100644 drivers/net/ethernet/microchip/lan966x/lan966x_lag.c

Comments

Vladimir Oltean July 2, 2022, 2:12 p.m. UTC | #1 
On Fri, Jul 01, 2022 at 10:52:25PM +0200, Horatiu Vultur wrote:
> Add link aggregation hardware offload support for lan966x
> 
> Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
> ---

Superficially the code looks OK (maybe if you could only remove the
trailing "." from the commit message). A comment below.

> +int lan966x_lag_port_prechangeupper(struct net_device *dev,
> +				    struct netdev_notifier_changeupper_info *info)
> +{
> +	struct lan966x_port *port = netdev_priv(dev);
> +	struct lan966x *lan966x = port->lan966x;
> +	struct netdev_lag_upper_info *lui;
> +	struct netlink_ext_ack *extack;
> +
> +	extack = netdev_notifier_info_to_extack(&info->info);
> +	lui = info->upper_info;
> +	if (!lui)
> +		return NOTIFY_DONE;
> +
> +	if (lui->tx_type != NETDEV_LAG_TX_TYPE_HASH) {
> +		NL_SET_ERR_MSG_MOD(extack,
> +				   "LAG device using unsupported Tx type");
> +		return notifier_from_errno(-EINVAL);
> +	}
> +
> +	switch (lui->hash_type) {
> +	case NETDEV_LAG_HASH_L2:
> +		lan_wr(ANA_AGGR_CFG_AC_DMAC_ENA_SET(1) |
> +		       ANA_AGGR_CFG_AC_SMAC_ENA_SET(1),
> +		       lan966x, ANA_AGGR_CFG);
> +		break;
> +	case NETDEV_LAG_HASH_L34:
> +		lan_wr(ANA_AGGR_CFG_AC_IP6_TCPUDP_ENA_SET(1) |
> +		       ANA_AGGR_CFG_AC_IP4_TCPUDP_ENA_SET(1) |
> +		       ANA_AGGR_CFG_AC_IP4_SIPDIP_ENA_SET(1),
> +		       lan966x, ANA_AGGR_CFG);
> +		break;
> +	case NETDEV_LAG_HASH_L23:
> +		lan_wr(ANA_AGGR_CFG_AC_DMAC_ENA_SET(1) |
> +		       ANA_AGGR_CFG_AC_SMAC_ENA_SET(1) |
> +		       ANA_AGGR_CFG_AC_IP6_TCPUDP_ENA_SET(1) |
> +		       ANA_AGGR_CFG_AC_IP4_TCPUDP_ENA_SET(1),
> +		       lan966x, ANA_AGGR_CFG);

ANA_AGGR_CFG is global to the switch, yet it constantly changes with the
hash_type of each new offloaded LAG. So a LAG that hashes on L3/L4 will
break the hash mode of an existing L2 LAG. I think you should implement
a system that disallows changes to ANA_AGGR_CFG as long as there are
users of a certain mode.

> +		break;
> +	default:
> +		NL_SET_ERR_MSG_MOD(extack,
> +				   "LAG device using unsupported hash type");
> +		return notifier_from_errno(-EINVAL);
> +	}
> +
> +	return NOTIFY_OK;
> +}
kernel test robot July 5, 2022, 6:38 p.m. UTC | #2 
Hi Horatiu,

I love your patch! Yet something to improve:

[auto build test ERROR on net-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Horatiu-Vultur/net-lan966x-Add-lag-support/20220702-045154
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git dbdd9a28e1406ab8218a69e60f10a168b968c81d
config: powerpc-randconfig-r012-20220703 (https://download.01.org/0day-ci/archive/20220706/202207060247.0TIpleTV-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 11.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/a531636c4ccc3d4528016f83627b2e4677e83e59
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Horatiu-Vultur/net-lan966x-Add-lag-support/20220702-045154
        git checkout a531636c4ccc3d4528016f83627b2e4677e83e59
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   powerpc-linux-ld: drivers/net/ethernet/microchip/lan966x/lan966x_lag.o: in function `lan966x_lag_port_join':
>> drivers/net/ethernet/microchip/lan966x/lan966x_lag.c:138: undefined reference to `br_port_get_stp_state'


vim +138 drivers/net/ethernet/microchip/lan966x/lan966x_lag.c

   118	
   119	int lan966x_lag_port_join(struct lan966x_port *port,
   120				  struct net_device *brport_dev,
   121				  struct net_device *bond,
   122				  struct netlink_ext_ack *extack)
   123	{
   124		struct lan966x *lan966x = port->lan966x;
   125		struct net_device *dev = port->dev;
   126		int err;
   127	
   128		port->bond = bond;
   129		lan966x_lag_update_ids(lan966x);
   130	
   131		err = switchdev_bridge_port_offload(brport_dev, dev, port,
   132						    &lan966x_switchdev_nb,
   133						    &lan966x_switchdev_blocking_nb,
   134						    false, extack);
   135		if (err)
   136			goto out;
   137	
 > 138		lan966x_port_stp_state_set(port, br_port_get_stp_state(brport_dev));
   139	
   140		return 0;
   141	
   142	out:
   143		port->bond = NULL;
   144		lan966x_lag_update_ids(lan966x);
   145	
   146		return err;
   147	}
   148
Vladimir Oltean July 6, 2022, 8:45 a.m. UTC | #3 
On Wed, Jul 06, 2022 at 02:38:37AM +0800, kernel test robot wrote:
>  > 138		lan966x_port_stp_state_set(port, br_port_get_stp_state(brport_dev));

When you call a symbol exported by the bridge driver (in this case
br_port_get_stp_state) you need to enforce the fact that you should be
built as module when the bridge is a module.

	depends on BRIDGE || BRIDGE=n
diff mbox series

Patch

diff --git a/drivers/net/ethernet/microchip/lan966x/Makefile b/drivers/net/ethernet/microchip/lan966x/Makefile
index fd2e0ebb2427..0c22c86bdaa9 100644
--- a/drivers/net/ethernet/microchip/lan966x/Makefile
+++ b/drivers/net/ethernet/microchip/lan966x/Makefile
@@ -8,4 +8,4 @@  obj-$(CONFIG_LAN966X_SWITCH) += lan966x-switch.o
 lan966x-switch-objs  := lan966x_main.o lan966x_phylink.o lan966x_port.o \
 			lan966x_mac.o lan966x_ethtool.o lan966x_switchdev.o \
 			lan966x_vlan.o lan966x_fdb.o lan966x_mdb.o \
-			lan966x_ptp.o lan966x_fdma.o
+			lan966x_ptp.o lan966x_fdma.o lan966x_lag.o
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_lag.c b/drivers/net/ethernet/microchip/lan966x/lan966x_lag.c
new file mode 100644
index 000000000000..8fd62611cfa4
--- /dev/null
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_lag.c
@@ -0,0 +1,309 @@ 
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <linux/if_bridge.h>
+
+#include "lan966x_main.h"
+
+static void lan966x_lag_set_aggr_pgids(struct lan966x *lan966x)
+{
+	u32 visited = GENMASK(lan966x->num_phys_ports - 1, 0);
+	int p, lag, i;
+
+	/* Reset destination and aggregation PGIDS */
+	for (p = 0; p < lan966x->num_phys_ports; ++p)
+		lan_wr(ANA_PGID_PGID_SET(BIT(p)),
+		       lan966x, ANA_PGID(p));
+
+	for (p = PGID_AGGR; p < PGID_SRC; ++p)
+		lan_wr(ANA_PGID_PGID_SET(visited),
+		       lan966x, ANA_PGID(p));
+
+	/* The visited ports bitmask holds the list of ports offloading any
+	 * bonding interface. Initially we mark all these ports as unvisited,
+	 * then every time we visit a port in this bitmask, we know that it is
+	 * the lowest numbered port, i.e. the one whose logical ID == physical
+	 * port ID == LAG ID. So we mark as visited all further ports in the
+	 * bitmask that are offloading the same bonding interface. This way,
+	 * we set up the aggregation PGIDs only once per bonding interface.
+	 */
+	for (p = 0; p < lan966x->num_phys_ports; ++p) {
+		struct lan966x_port *port = lan966x->ports[p];
+
+		if (!port || !port->bond)
+			continue;
+
+		visited &= ~BIT(p);
+	}
+
+	/* Now, set PGIDs for each active LAG */
+	for (lag = 0; lag < lan966x->num_phys_ports; ++lag) {
+		struct net_device *bond = lan966x->ports[lag]->bond;
+		int num_active_ports = 0;
+		unsigned long bond_mask;
+		u8 aggr_idx[16];
+
+		if (!bond || (visited & BIT(lag)))
+			continue;
+
+		bond_mask = lan966x_lag_get_mask(lan966x, bond);
+
+		for_each_set_bit(p, &bond_mask, lan966x->num_phys_ports) {
+			struct lan966x_port *port = lan966x->ports[p];
+
+			lan_wr(ANA_PGID_PGID_SET(bond_mask),
+			       lan966x, ANA_PGID(p));
+			if (port->lag_tx_active)
+				aggr_idx[num_active_ports++] = p;
+		}
+
+		for (i = PGID_AGGR; i < PGID_SRC; ++i) {
+			u32 ac;
+
+			ac = lan_rd(lan966x, ANA_PGID(i));
+			ac &= ~bond_mask;
+			/* Don't do division by zero if there was no active
+			 * port. Just make all aggregation codes zero.
+			 */
+			if (num_active_ports)
+				ac |= BIT(aggr_idx[i % num_active_ports]);
+			lan_wr(ANA_PGID_PGID_SET(ac),
+			       lan966x, ANA_PGID(i));
+		}
+
+		/* Mark all ports in the same LAG as visited to avoid applying
+		 * the same config again.
+		 */
+		for (p = lag; p < lan966x->num_phys_ports; p++) {
+			struct lan966x_port *port = lan966x->ports[p];
+
+			if (!port)
+				continue;
+
+			if (port->bond == bond)
+				visited |= BIT(p);
+		}
+	}
+}
+
+static void lan966x_lag_set_port_ids(struct lan966x *lan966x)
+{
+	struct lan966x_port *port;
+	u32 bond_mask;
+	u32 lag_id;
+	int p;
+
+	for (p = 0; p < lan966x->num_phys_ports; ++p) {
+		port = lan966x->ports[p];
+		if (!port)
+			continue;
+
+		lag_id = port->chip_port;
+
+		bond_mask = lan966x_lag_get_mask(lan966x, port->bond);
+		if (bond_mask)
+			lag_id = __ffs(bond_mask);
+
+		lan_rmw(ANA_PORT_CFG_PORTID_VAL_SET(lag_id),
+			ANA_PORT_CFG_PORTID_VAL,
+			lan966x, ANA_PORT_CFG(port->chip_port));
+	}
+}
+
+static void lan966x_lag_update_ids(struct lan966x *lan966x)
+{
+	lan966x_lag_set_port_ids(lan966x);
+	lan966x_update_fwd_mask(lan966x);
+	lan966x_lag_set_aggr_pgids(lan966x);
+}
+
+int lan966x_lag_port_join(struct lan966x_port *port,
+			  struct net_device *brport_dev,
+			  struct net_device *bond,
+			  struct netlink_ext_ack *extack)
+{
+	struct lan966x *lan966x = port->lan966x;
+	struct net_device *dev = port->dev;
+	int err;
+
+	port->bond = bond;
+	lan966x_lag_update_ids(lan966x);
+
+	err = switchdev_bridge_port_offload(brport_dev, dev, port,
+					    &lan966x_switchdev_nb,
+					    &lan966x_switchdev_blocking_nb,
+					    false, extack);
+	if (err)
+		goto out;
+
+	lan966x_port_stp_state_set(port, br_port_get_stp_state(brport_dev));
+
+	return 0;
+
+out:
+	port->bond = NULL;
+	lan966x_lag_update_ids(lan966x);
+
+	return err;
+}
+
+void lan966x_lag_port_leave(struct lan966x_port *port, struct net_device *bond)
+{
+	struct lan966x *lan966x = port->lan966x;
+
+	port->bond = NULL;
+	lan966x_lag_update_ids(lan966x);
+	lan966x_port_stp_state_set(port, BR_STATE_FORWARDING);
+}
+
+int lan966x_lag_port_prechangeupper(struct net_device *dev,
+				    struct netdev_notifier_changeupper_info *info)
+{
+	struct lan966x_port *port = netdev_priv(dev);
+	struct lan966x *lan966x = port->lan966x;
+	struct netdev_lag_upper_info *lui;
+	struct netlink_ext_ack *extack;
+
+	extack = netdev_notifier_info_to_extack(&info->info);
+	lui = info->upper_info;
+	if (!lui)
+		return NOTIFY_DONE;
+
+	if (lui->tx_type != NETDEV_LAG_TX_TYPE_HASH) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "LAG device using unsupported Tx type");
+		return notifier_from_errno(-EINVAL);
+	}
+
+	switch (lui->hash_type) {
+	case NETDEV_LAG_HASH_L2:
+		lan_wr(ANA_AGGR_CFG_AC_DMAC_ENA_SET(1) |
+		       ANA_AGGR_CFG_AC_SMAC_ENA_SET(1),
+		       lan966x, ANA_AGGR_CFG);
+		break;
+	case NETDEV_LAG_HASH_L34:
+		lan_wr(ANA_AGGR_CFG_AC_IP6_TCPUDP_ENA_SET(1) |
+		       ANA_AGGR_CFG_AC_IP4_TCPUDP_ENA_SET(1) |
+		       ANA_AGGR_CFG_AC_IP4_SIPDIP_ENA_SET(1),
+		       lan966x, ANA_AGGR_CFG);
+		break;
+	case NETDEV_LAG_HASH_L23:
+		lan_wr(ANA_AGGR_CFG_AC_DMAC_ENA_SET(1) |
+		       ANA_AGGR_CFG_AC_SMAC_ENA_SET(1) |
+		       ANA_AGGR_CFG_AC_IP6_TCPUDP_ENA_SET(1) |
+		       ANA_AGGR_CFG_AC_IP4_TCPUDP_ENA_SET(1),
+		       lan966x, ANA_AGGR_CFG);
+		break;
+	default:
+		NL_SET_ERR_MSG_MOD(extack,
+				   "LAG device using unsupported hash type");
+		return notifier_from_errno(-EINVAL);
+	}
+
+	return NOTIFY_OK;
+}
+
+int lan966x_lag_port_changelowerstate(struct net_device *dev,
+				      struct netdev_notifier_changelowerstate_info *info)
+{
+	struct netdev_lag_lower_state_info *lag = info->lower_state_info;
+	struct lan966x_port *port = netdev_priv(dev);
+	struct lan966x *lan966x = port->lan966x;
+	bool is_active;
+
+	if (!port->bond)
+		return NOTIFY_DONE;
+
+	is_active = lag->link_up && lag->tx_enabled;
+	if (port->lag_tx_active == is_active)
+		return NOTIFY_DONE;
+
+	port->lag_tx_active = is_active;
+	lan966x_lag_set_aggr_pgids(lan966x);
+
+	return NOTIFY_OK;
+}
+
+int lan966x_lag_netdev_prechangeupper(struct net_device *dev,
+				      struct netdev_notifier_changeupper_info *info)
+{
+	struct lan966x_port *port;
+	struct net_device *lower;
+	struct list_head *iter;
+	int err;
+
+	netdev_for_each_lower_dev(dev, lower, iter) {
+		if (!lan966x_netdevice_check(lower))
+			continue;
+
+		port = netdev_priv(lower);
+		if (port->bond != dev)
+			continue;
+
+		err = lan966x_port_prechangeupper(lower, dev, info);
+		if (err)
+			return err;
+	}
+
+	return NOTIFY_DONE;
+}
+
+int lan966x_lag_netdev_changeupper(struct net_device *dev,
+				   struct netdev_notifier_changeupper_info *info)
+{
+	struct lan966x_port *port;
+	struct net_device *lower;
+	struct list_head *iter;
+	int err;
+
+	netdev_for_each_lower_dev(dev, lower, iter) {
+		if (!lan966x_netdevice_check(lower))
+			continue;
+
+		port = netdev_priv(lower);
+		if (port->bond != dev)
+			continue;
+
+		err = lan966x_port_changeupper(lower, dev, info);
+		if (err)
+			return err;
+	}
+
+	return NOTIFY_DONE;
+}
+
+bool lan966x_lag_first_port(struct net_device *lag, struct net_device *dev)
+{
+	struct lan966x_port *port = netdev_priv(dev);
+	struct lan966x *lan966x = port->lan966x;
+	unsigned long bond_mask;
+
+	if (port->bond != lag)
+		return false;
+
+	bond_mask = lan966x_lag_get_mask(lan966x, lag);
+	if (bond_mask && port->chip_port == __ffs(bond_mask))
+		return true;
+
+	return false;
+}
+
+u32 lan966x_lag_get_mask(struct lan966x *lan966x, struct net_device *bond)
+{
+	struct lan966x_port *port;
+	u32 mask = 0;
+	int p;
+
+	if (!bond)
+		return mask;
+
+	for (p = 0; p < lan966x->num_phys_ports; p++) {
+		port = lan966x->ports[p];
+		if (!port)
+			continue;
+
+		if (port->bond == bond)
+			mask |= BIT(p);
+	}
+
+	return mask;
+}
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
index f820b1c71c47..35c713c87661 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
@@ -291,6 +291,9 @@  struct lan966x_port {
 	u8 ptp_cmd;
 	u16 ts_id;
 	struct sk_buff_head tx_skbs;
+
+	struct net_device *bond;
+	bool lag_tx_active;
 };
 
 extern const struct phylink_mac_ops lan966x_phylink_mac_ops;
@@ -408,6 +411,33 @@  int lan966x_fdma_init(struct lan966x *lan966x);
 void lan966x_fdma_deinit(struct lan966x *lan966x);
 irqreturn_t lan966x_fdma_irq_handler(int irq, void *args);
 
+int lan966x_lag_port_join(struct lan966x_port *port,
+			  struct net_device *brport_dev,
+			  struct net_device *bond,
+			  struct netlink_ext_ack *extack);
+void lan966x_lag_port_leave(struct lan966x_port *port, struct net_device *bond);
+int lan966x_lag_port_prechangeupper(struct net_device *dev,
+				    struct netdev_notifier_changeupper_info *info);
+int lan966x_lag_port_changelowerstate(struct net_device *dev,
+				      struct netdev_notifier_changelowerstate_info *info);
+int lan966x_lag_netdev_prechangeupper(struct net_device *dev,
+				      struct netdev_notifier_changeupper_info *info);
+int lan966x_lag_netdev_changeupper(struct net_device *dev,
+				   struct netdev_notifier_changeupper_info *info);
+bool lan966x_lag_first_port(struct net_device *lag, struct net_device *dev);
+u32 lan966x_lag_get_mask(struct lan966x *lan966x, struct net_device *bond);
+
+int lan966x_port_changeupper(struct net_device *dev,
+			     struct net_device *brport_dev,
+			     struct netdev_notifier_changeupper_info *info);
+int lan966x_port_prechangeupper(struct net_device *dev,
+				struct net_device *brport_dev,
+				struct netdev_notifier_changeupper_info *info);
+void lan966x_port_stp_state_set(struct lan966x_port *port, u8 state);
+void lan966x_port_ageing_set(struct lan966x_port *port,
+			     unsigned long ageing_clock_t);
+void lan966x_update_fwd_mask(struct lan966x *lan966x);
+
 static inline void __iomem *lan_addr(void __iomem *base[],
 				     int id, int tinst, int tcnt,
 				     int gbase, int ginst,
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c b/drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c
index fe872edfcdca..0cd53dca87ce 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c
@@ -130,7 +130,7 @@  static int lan966x_port_pre_bridge_flags(struct lan966x_port *port,
 	return 0;
 }
 
-static void lan966x_update_fwd_mask(struct lan966x *lan966x)
+void lan966x_update_fwd_mask(struct lan966x *lan966x)
 {
 	int i;
 
@@ -138,9 +138,14 @@  static void lan966x_update_fwd_mask(struct lan966x *lan966x)
 		struct lan966x_port *port = lan966x->ports[i];
 		unsigned long mask = 0;
 
-		if (port && lan966x->bridge_fwd_mask & BIT(i))
+		if (port && lan966x->bridge_fwd_mask & BIT(i)) {
 			mask = lan966x->bridge_fwd_mask & ~BIT(i);
 
+			if (port->bond)
+				mask &= ~lan966x_lag_get_mask(lan966x,
+							      port->bond);
+		}
+
 		mask |= BIT(CPU_PORT);
 
 		lan_wr(ANA_PGID_PGID_SET(mask),
@@ -148,7 +153,7 @@  static void lan966x_update_fwd_mask(struct lan966x *lan966x)
 	}
 }
 
-static void lan966x_port_stp_state_set(struct lan966x_port *port, u8 state)
+void lan966x_port_stp_state_set(struct lan966x_port *port, u8 state)
 {
 	struct lan966x *lan966x = port->lan966x;
 	bool learn_ena = false;
@@ -169,8 +174,8 @@  static void lan966x_port_stp_state_set(struct lan966x_port *port, u8 state)
 	lan966x_update_fwd_mask(lan966x);
 }
 
-static void lan966x_port_ageing_set(struct lan966x_port *port,
-				    unsigned long ageing_clock_t)
+void lan966x_port_ageing_set(struct lan966x_port *port,
+			     unsigned long ageing_clock_t)
 {
 	unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock_t);
 	u32 ageing_time = jiffies_to_msecs(ageing_jiffies) / 1000;
@@ -239,6 +244,7 @@  static int lan966x_port_attr_set(struct net_device *dev, const void *ctx,
 }
 
 static int lan966x_port_bridge_join(struct lan966x_port *port,
+				    struct net_device *brport_dev,
 				    struct net_device *bridge,
 				    struct netlink_ext_ack *extack)
 {
@@ -256,7 +262,7 @@  static int lan966x_port_bridge_join(struct lan966x_port *port,
 		}
 	}
 
-	err = switchdev_bridge_port_offload(dev, dev, port,
+	err = switchdev_bridge_port_offload(brport_dev, dev, port,
 					    &lan966x_switchdev_nb,
 					    &lan966x_switchdev_blocking_nb,
 					    false, extack);
@@ -293,8 +299,9 @@  static void lan966x_port_bridge_leave(struct lan966x_port *port,
 	lan966x_vlan_port_apply(port);
 }
 
-static int lan966x_port_changeupper(struct net_device *dev,
-				    struct netdev_notifier_changeupper_info *info)
+int lan966x_port_changeupper(struct net_device *dev,
+			     struct net_device *brport_dev,
+			     struct netdev_notifier_changeupper_info *info)
 {
 	struct lan966x_port *port = netdev_priv(dev);
 	struct netlink_ext_ack *extack;
@@ -304,26 +311,44 @@  static int lan966x_port_changeupper(struct net_device *dev,
 
 	if (netif_is_bridge_master(info->upper_dev)) {
 		if (info->linking)
-			err = lan966x_port_bridge_join(port, info->upper_dev,
+			err = lan966x_port_bridge_join(port, brport_dev,
+						       info->upper_dev,
 						       extack);
 		else
 			lan966x_port_bridge_leave(port, info->upper_dev);
 	}
 
+	if (netif_is_lag_master(info->upper_dev)) {
+		if (info->linking)
+			err = lan966x_lag_port_join(port, info->upper_dev,
+						    info->upper_dev,
+						    extack);
+		else
+			lan966x_lag_port_leave(port, info->upper_dev);
+	}
+
 	return err;
 }
 
-static int lan966x_port_prechangeupper(struct net_device *dev,
-				       struct netdev_notifier_changeupper_info *info)
+int lan966x_port_prechangeupper(struct net_device *dev,
+				struct net_device *brport_dev,
+				struct netdev_notifier_changeupper_info *info)
 {
 	struct lan966x_port *port = netdev_priv(dev);
+	int err = NOTIFY_DONE;
 
 	if (netif_is_bridge_master(info->upper_dev) && !info->linking) {
 		switchdev_bridge_port_unoffload(port->dev, port, NULL, NULL);
 		lan966x_fdb_flush_workqueue(port->lan966x);
 	}
 
-	return NOTIFY_DONE;
+	if (netif_is_lag_master(info->upper_dev) && info->linking)
+		err = lan966x_lag_port_prechangeupper(dev, info);
+
+	if (netif_is_lag_master(info->upper_dev) && !info->linking)
+		switchdev_bridge_port_unoffload(brport_dev, port, NULL, NULL);
+
+	return err;
 }
 
 static int lan966x_foreign_bridging_check(struct net_device *upper,
@@ -401,21 +426,44 @@  static int lan966x_netdevice_port_event(struct net_device *dev,
 	int err = 0;
 
 	if (!lan966x_netdevice_check(dev)) {
-		if (event == NETDEV_CHANGEUPPER)
-			return lan966x_bridge_check(dev, ptr);
+		switch (event) {
+		case NETDEV_CHANGEUPPER:
+		case NETDEV_PRECHANGEUPPER:
+			err = lan966x_bridge_check(dev, ptr);
+			if (err)
+				return err;
+
+			if (netif_is_lag_master(dev)) {
+				if (event == NETDEV_CHANGEUPPER)
+					err = lan966x_lag_netdev_changeupper(dev,
+									     ptr);
+				else
+					err = lan966x_lag_netdev_prechangeupper(dev,
+										ptr);
+
+				return err;
+			}
+			break;
+		default:
+			return 0;
+		}
+
 		return 0;
 	}
 
 	switch (event) {
 	case NETDEV_PRECHANGEUPPER:
-		err = lan966x_port_prechangeupper(dev, ptr);
+		err = lan966x_port_prechangeupper(dev, dev, ptr);
 		break;
 	case NETDEV_CHANGEUPPER:
 		err = lan966x_bridge_check(dev, ptr);
 		if (err)
 			return err;
 
-		err = lan966x_port_changeupper(dev, ptr);
+		err = lan966x_port_changeupper(dev, dev, ptr);
+		break;
+	case NETDEV_CHANGELOWERSTATE:
+		err = lan966x_lag_port_changelowerstate(dev, ptr);
 		break;
 	}
 
@@ -433,19 +481,23 @@  static int lan966x_netdevice_event(struct notifier_block *nb,
 	return notifier_from_errno(ret);
 }
 
-/* We don't offload uppers such as LAG as bridge ports, so every device except
- * the bridge itself is foreign.
- */
 static bool lan966x_foreign_dev_check(const struct net_device *dev,
 				      const struct net_device *foreign_dev)
 {
 	struct lan966x_port *port = netdev_priv(dev);
 	struct lan966x *lan966x = port->lan966x;
+	int i;
 
 	if (netif_is_bridge_master(foreign_dev))
 		if (lan966x->bridge == foreign_dev)
 			return false;
 
+	if (netif_is_lag_master(foreign_dev))
+		for (i = 0; i < lan966x->num_phys_ports; ++i)
+			if (lan966x->ports[i] &&
+			    lan966x->ports[i]->bond == foreign_dev)
+				return false;
+
 	return true;
 }