Merge branch 'reset/of-get-optional-exclusive' of git://git.pengutronix.de/pza/linux into timers/drivers/next

"Add optional variant of of_reset_control_get_exclusive(). If the
requested reset is not specified in the device tree, this function
returns NULL instead of an error."

This dependency is needed for the Generic Timer Module (a.k.a OSTM)
support for RZ/G2L.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

1 files changed, 202 insertions, 0 deletions

diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index 070698dd19bc..83460470e883 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -378,6 +378,160 @@ int call_switchdev_blocking_notifiers(unsigned long val, struct net_device *dev,
 }
 EXPORT_SYMBOL_GPL(call_switchdev_blocking_notifiers);
 
+struct switchdev_nested_priv {
+	bool (*check_cb)(const struct net_device *dev);
+	bool (*foreign_dev_check_cb)(const struct net_device *dev,
+				     const struct net_device *foreign_dev);
+	const struct net_device *dev;
+	struct net_device *lower_dev;
+};
+
+static int switchdev_lower_dev_walk(struct net_device *lower_dev,
+				    struct netdev_nested_priv *priv)
+{
+	struct switchdev_nested_priv *switchdev_priv = priv->data;
+	bool (*foreign_dev_check_cb)(const struct net_device *dev,
+				     const struct net_device *foreign_dev);
+	bool (*check_cb)(const struct net_device *dev);
+	const struct net_device *dev;
+
+	check_cb = switchdev_priv->check_cb;
+	foreign_dev_check_cb = switchdev_priv->foreign_dev_check_cb;
+	dev = switchdev_priv->dev;
+
+	if (check_cb(lower_dev) && !foreign_dev_check_cb(lower_dev, dev)) {
+		switchdev_priv->lower_dev = lower_dev;
+		return 1;
+	}
+
+	return 0;
+}
+
+static struct net_device *
+switchdev_lower_dev_find(struct net_device *dev,
+			 bool (*check_cb)(const struct net_device *dev),
+			 bool (*foreign_dev_check_cb)(const struct net_device *dev,
+						      const struct net_device *foreign_dev))
+{
+	struct switchdev_nested_priv switchdev_priv = {
+		.check_cb = check_cb,
+		.foreign_dev_check_cb = foreign_dev_check_cb,
+		.dev = dev,
+		.lower_dev = NULL,
+	};
+	struct netdev_nested_priv priv = {
+		.data = &switchdev_priv,
+	};
+
+	netdev_walk_all_lower_dev_rcu(dev, switchdev_lower_dev_walk, &priv);
+
+	return switchdev_priv.lower_dev;
+}
+
+static int __switchdev_handle_fdb_event_to_device(struct net_device *dev,
+		struct net_device *orig_dev, unsigned long event,
+		const struct switchdev_notifier_fdb_info *fdb_info,
+		bool (*check_cb)(const struct net_device *dev),
+		bool (*foreign_dev_check_cb)(const struct net_device *dev,
+					     const struct net_device *foreign_dev),
+		int (*mod_cb)(struct net_device *dev, struct net_device *orig_dev,
+			      unsigned long event, const void *ctx,
+			      const struct switchdev_notifier_fdb_info *fdb_info),
+		int (*lag_mod_cb)(struct net_device *dev, struct net_device *orig_dev,
+				  unsigned long event, const void *ctx,
+				  const struct switchdev_notifier_fdb_info *fdb_info))
+{
+	const struct switchdev_notifier_info *info = &fdb_info->info;
+	struct net_device *br, *lower_dev;
+	struct list_head *iter;
+	int err = -EOPNOTSUPP;
+
+	if (check_cb(dev))
+		return mod_cb(dev, orig_dev, event, info->ctx, fdb_info);
+
+	if (netif_is_lag_master(dev)) {
+		if (!switchdev_lower_dev_find(dev, check_cb, foreign_dev_check_cb))
+			goto maybe_bridged_with_us;
+
+		/* This is a LAG interface that we offload */
+		if (!lag_mod_cb)
+			return -EOPNOTSUPP;
+
+		return lag_mod_cb(dev, orig_dev, event, info->ctx, fdb_info);
+	}
+
+	/* Recurse through lower interfaces in case the FDB entry is pointing
+	 * towards a bridge device.
+	 */
+	if (netif_is_bridge_master(dev)) {
+		if (!switchdev_lower_dev_find(dev, check_cb, foreign_dev_check_cb))
+			return 0;
+
+		/* This is a bridge interface that we offload */
+		netdev_for_each_lower_dev(dev, lower_dev, iter) {
+			/* Do not propagate FDB entries across bridges */
+			if (netif_is_bridge_master(lower_dev))
+				continue;
+
+			/* Bridge ports might be either us, or LAG interfaces
+			 * that we offload.
+			 */
+			if (!check_cb(lower_dev) &&
+			    !switchdev_lower_dev_find(lower_dev, check_cb,
+						      foreign_dev_check_cb))
+				continue;
+
+			err = __switchdev_handle_fdb_event_to_device(lower_dev, orig_dev,
+								     event, fdb_info, check_cb,
+								     foreign_dev_check_cb,
+								     mod_cb, lag_mod_cb);
+			if (err && err != -EOPNOTSUPP)
+				return err;
+		}
+
+		return 0;
+	}
+
+maybe_bridged_with_us:
+	/* Event is neither on a bridge nor a LAG. Check whether it is on an
+	 * interface that is in a bridge with us.
+	 */
+	br = netdev_master_upper_dev_get_rcu(dev);
+	if (!br || !netif_is_bridge_master(br))
+		return 0;
+
+	if (!switchdev_lower_dev_find(br, check_cb, foreign_dev_check_cb))
+		return 0;
+
+	return __switchdev_handle_fdb_event_to_device(br, orig_dev, event, fdb_info,
+						      check_cb, foreign_dev_check_cb,
+						      mod_cb, lag_mod_cb);
+}
+
+int switchdev_handle_fdb_event_to_device(struct net_device *dev, unsigned long event,
+		const struct switchdev_notifier_fdb_info *fdb_info,
+		bool (*check_cb)(const struct net_device *dev),
+		bool (*foreign_dev_check_cb)(const struct net_device *dev,
+					     const struct net_device *foreign_dev),
+		int (*mod_cb)(struct net_device *dev, struct net_device *orig_dev,
+			      unsigned long event, const void *ctx,
+			      const struct switchdev_notifier_fdb_info *fdb_info),
+		int (*lag_mod_cb)(struct net_device *dev, struct net_device *orig_dev,
+				  unsigned long event, const void *ctx,
+				  const struct switchdev_notifier_fdb_info *fdb_info))
+{
+	int err;
+
+	err = __switchdev_handle_fdb_event_to_device(dev, dev, event, fdb_info,
+						     check_cb, foreign_dev_check_cb,
+						     mod_cb, lag_mod_cb);
+	if (err == -EOPNOTSUPP)
+		err = 0;
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(switchdev_handle_fdb_event_to_device);
+
 static int __switchdev_handle_port_obj_add(struct net_device *dev,
 			struct switchdev_notifier_port_obj_info *port_obj_info,
 			bool (*check_cb)(const struct net_device *dev),
@@ -549,3 +703,51 @@ int switchdev_handle_port_attr_set(struct net_device *dev,
 	return err;
 }
 EXPORT_SYMBOL_GPL(switchdev_handle_port_attr_set);
+
+int switchdev_bridge_port_offload(struct net_device *brport_dev,
+				  struct net_device *dev, const void *ctx,
+				  struct notifier_block *atomic_nb,
+				  struct notifier_block *blocking_nb,
+				  bool tx_fwd_offload,
+				  struct netlink_ext_ack *extack)
+{
+	struct switchdev_notifier_brport_info brport_info = {
+		.brport = {
+			.dev = dev,
+			.ctx = ctx,
+			.atomic_nb = atomic_nb,
+			.blocking_nb = blocking_nb,
+			.tx_fwd_offload = tx_fwd_offload,
+		},
+	};
+	int err;
+
+	ASSERT_RTNL();
+
+	err = call_switchdev_blocking_notifiers(SWITCHDEV_BRPORT_OFFLOADED,
+						brport_dev, &brport_info.info,
+						extack);
+	return notifier_to_errno(err);
+}
+EXPORT_SYMBOL_GPL(switchdev_bridge_port_offload);
+
+void switchdev_bridge_port_unoffload(struct net_device *brport_dev,
+				     const void *ctx,
+				     struct notifier_block *atomic_nb,
+				     struct notifier_block *blocking_nb)
+{
+	struct switchdev_notifier_brport_info brport_info = {
+		.brport = {
+			.ctx = ctx,
+			.atomic_nb = atomic_nb,
+			.blocking_nb = blocking_nb,
+		},
+	};
+
+	ASSERT_RTNL();
+
+	call_switchdev_blocking_notifiers(SWITCHDEV_BRPORT_UNOFFLOADED,
+					  brport_dev, &brport_info.info,
+					  NULL);
+}
+EXPORT_SYMBOL_GPL(switchdev_bridge_port_unoffload);