Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 946 insertions, 0 deletions

diff --git a/include/net/dsa.h b/include/net/dsa.h
new file mode 100644
index 000000000..35429a140
--- /dev/null
+++ b/include/net/dsa.h
@@ -0,0 +1,946 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
+ * Copyright (c) 2008-2009 Marvell Semiconductor
+ */
+
+#ifndef __LINUX_NET_DSA_H
+#define __LINUX_NET_DSA_H
+
+#include <linux/if.h>
+#include <linux/if_ether.h>
+#include <linux/list.h>
+#include <linux/notifier.h>
+#include <linux/timer.h>
+#include <linux/workqueue.h>
+#include <linux/of.h>
+#include <linux/ethtool.h>
+#include <linux/net_tstamp.h>
+#include <linux/phy.h>
+#include <linux/platform_data/dsa.h>
+#include <linux/phylink.h>
+#include <net/devlink.h>
+#include <net/switchdev.h>
+
+struct tc_action;
+struct phy_device;
+struct fixed_phy_status;
+struct phylink_link_state;
+
+#define DSA_TAG_PROTO_NONE_VALUE		0
+#define DSA_TAG_PROTO_BRCM_VALUE		1
+#define DSA_TAG_PROTO_BRCM_PREPEND_VALUE	2
+#define DSA_TAG_PROTO_DSA_VALUE			3
+#define DSA_TAG_PROTO_EDSA_VALUE		4
+#define DSA_TAG_PROTO_GSWIP_VALUE		5
+#define DSA_TAG_PROTO_KSZ9477_VALUE		6
+#define DSA_TAG_PROTO_KSZ9893_VALUE		7
+#define DSA_TAG_PROTO_LAN9303_VALUE		8
+#define DSA_TAG_PROTO_MTK_VALUE			9
+#define DSA_TAG_PROTO_QCA_VALUE			10
+#define DSA_TAG_PROTO_TRAILER_VALUE		11
+#define DSA_TAG_PROTO_8021Q_VALUE		12
+#define DSA_TAG_PROTO_SJA1105_VALUE		13
+#define DSA_TAG_PROTO_KSZ8795_VALUE		14
+#define DSA_TAG_PROTO_OCELOT_VALUE		15
+#define DSA_TAG_PROTO_AR9331_VALUE		16
+#define DSA_TAG_PROTO_RTL4_A_VALUE		17
+
+enum dsa_tag_protocol {
+	DSA_TAG_PROTO_NONE		= DSA_TAG_PROTO_NONE_VALUE,
+	DSA_TAG_PROTO_BRCM		= DSA_TAG_PROTO_BRCM_VALUE,
+	DSA_TAG_PROTO_BRCM_PREPEND	= DSA_TAG_PROTO_BRCM_PREPEND_VALUE,
+	DSA_TAG_PROTO_DSA		= DSA_TAG_PROTO_DSA_VALUE,
+	DSA_TAG_PROTO_EDSA		= DSA_TAG_PROTO_EDSA_VALUE,
+	DSA_TAG_PROTO_GSWIP		= DSA_TAG_PROTO_GSWIP_VALUE,
+	DSA_TAG_PROTO_KSZ9477		= DSA_TAG_PROTO_KSZ9477_VALUE,
+	DSA_TAG_PROTO_KSZ9893		= DSA_TAG_PROTO_KSZ9893_VALUE,
+	DSA_TAG_PROTO_LAN9303		= DSA_TAG_PROTO_LAN9303_VALUE,
+	DSA_TAG_PROTO_MTK		= DSA_TAG_PROTO_MTK_VALUE,
+	DSA_TAG_PROTO_QCA		= DSA_TAG_PROTO_QCA_VALUE,
+	DSA_TAG_PROTO_TRAILER		= DSA_TAG_PROTO_TRAILER_VALUE,
+	DSA_TAG_PROTO_8021Q		= DSA_TAG_PROTO_8021Q_VALUE,
+	DSA_TAG_PROTO_SJA1105		= DSA_TAG_PROTO_SJA1105_VALUE,
+	DSA_TAG_PROTO_KSZ8795		= DSA_TAG_PROTO_KSZ8795_VALUE,
+	DSA_TAG_PROTO_OCELOT		= DSA_TAG_PROTO_OCELOT_VALUE,
+	DSA_TAG_PROTO_AR9331		= DSA_TAG_PROTO_AR9331_VALUE,
+	DSA_TAG_PROTO_RTL4_A		= DSA_TAG_PROTO_RTL4_A_VALUE,
+};
+
+struct packet_type;
+struct dsa_switch;
+
+struct dsa_device_ops {
+	struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);
+	struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
+			       struct packet_type *pt);
+	void (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
+			     int *offset);
+	/* Used to determine which traffic should match the DSA filter in
+	 * eth_type_trans, and which, if any, should bypass it and be processed
+	 * as regular on the master net device.
+	 */
+	bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
+	unsigned int overhead;
+	const char *name;
+	enum dsa_tag_protocol proto;
+	/* Some tagging protocols either mangle or shift the destination MAC
+	 * address, in which case the DSA master would drop packets on ingress
+	 * if what it understands out of the destination MAC address is not in
+	 * its RX filter.
+	 */
+	bool promisc_on_master;
+	bool tail_tag;
+};
+
+/* This structure defines the control interfaces that are overlayed by the
+ * DSA layer on top of the DSA CPU/management net_device instance. This is
+ * used by the core net_device layer while calling various net_device_ops
+ * function pointers.
+ */
+struct dsa_netdevice_ops {
+	int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr,
+			    int cmd);
+};
+
+#define DSA_TAG_DRIVER_ALIAS "dsa_tag-"
+#define MODULE_ALIAS_DSA_TAG_DRIVER(__proto)				\
+	MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE))
+
+struct dsa_skb_cb {
+	struct sk_buff *clone;
+};
+
+struct __dsa_skb_cb {
+	struct dsa_skb_cb cb;
+	u8 priv[48 - sizeof(struct dsa_skb_cb)];
+};
+
+#define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb))
+
+#define DSA_SKB_CB_PRIV(skb)			\
+	((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv))
+
+struct dsa_switch_tree {
+	struct list_head	list;
+
+	/* Notifier chain for switch-wide events */
+	struct raw_notifier_head	nh;
+
+	/* Tree identifier */
+	unsigned int index;
+
+	/* Number of switches attached to this tree */
+	struct kref refcount;
+
+	/* Has this tree been applied to the hardware? */
+	bool setup;
+
+	/*
+	 * Configuration data for the platform device that owns
+	 * this dsa switch tree instance.
+	 */
+	struct dsa_platform_data	*pd;
+
+	/* List of switch ports */
+	struct list_head ports;
+
+	/* List of DSA links composing the routing table */
+	struct list_head rtable;
+};
+
+/* TC matchall action types */
+enum dsa_port_mall_action_type {
+	DSA_PORT_MALL_MIRROR,
+	DSA_PORT_MALL_POLICER,
+};
+
+/* TC mirroring entry */
+struct dsa_mall_mirror_tc_entry {
+	u8 to_local_port;
+	bool ingress;
+};
+
+/* TC port policer entry */
+struct dsa_mall_policer_tc_entry {
+	u32 burst;
+	u64 rate_bytes_per_sec;
+};
+
+/* TC matchall entry */
+struct dsa_mall_tc_entry {
+	struct list_head list;
+	unsigned long cookie;
+	enum dsa_port_mall_action_type type;
+	union {
+		struct dsa_mall_mirror_tc_entry mirror;
+		struct dsa_mall_policer_tc_entry policer;
+	};
+};
+
+
+struct dsa_port {
+	/* A CPU port is physically connected to a master device.
+	 * A user port exposed to userspace has a slave device.
+	 */
+	union {
+		struct net_device *master;
+		struct net_device *slave;
+	};
+
+	/* CPU port tagging operations used by master or slave devices */
+	const struct dsa_device_ops *tag_ops;
+
+	/* Copies for faster access in master receive hot path */
+	struct dsa_switch_tree *dst;
+	struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
+			       struct packet_type *pt);
+	bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
+
+	enum {
+		DSA_PORT_TYPE_UNUSED = 0,
+		DSA_PORT_TYPE_CPU,
+		DSA_PORT_TYPE_DSA,
+		DSA_PORT_TYPE_USER,
+	} type;
+
+	struct dsa_switch	*ds;
+	unsigned int		index;
+	const char		*name;
+	struct dsa_port		*cpu_dp;
+	const char		*mac;
+	struct device_node	*dn;
+	unsigned int		ageing_time;
+	bool			vlan_filtering;
+	u8			stp_state;
+	struct net_device	*bridge_dev;
+	struct devlink_port	devlink_port;
+	bool			devlink_port_setup;
+	struct phylink		*pl;
+	struct phylink_config	pl_config;
+
+	struct list_head list;
+
+	/*
+	 * Give the switch driver somewhere to hang its per-port private data
+	 * structures (accessible from the tagger).
+	 */
+	void *priv;
+
+	/*
+	 * Original copy of the master netdev ethtool_ops
+	 */
+	const struct ethtool_ops *orig_ethtool_ops;
+
+	/*
+	 * Original copy of the master netdev net_device_ops
+	 */
+	const struct dsa_netdevice_ops *netdev_ops;
+
+	bool setup;
+};
+
+/* TODO: ideally DSA ports would have a single dp->link_dp member,
+ * and no dst->rtable nor this struct dsa_link would be needed,
+ * but this would require some more complex tree walking,
+ * so keep it stupid at the moment and list them all.
+ */
+struct dsa_link {
+	struct dsa_port *dp;
+	struct dsa_port *link_dp;
+	struct list_head list;
+};
+
+struct dsa_switch {
+	bool setup;
+
+	struct device *dev;
+
+	/*
+	 * Parent switch tree, and switch index.
+	 */
+	struct dsa_switch_tree	*dst;
+	unsigned int		index;
+
+	/* Listener for switch fabric events */
+	struct notifier_block	nb;
+
+	/*
+	 * Give the switch driver somewhere to hang its private data
+	 * structure.
+	 */
+	void *priv;
+
+	/*
+	 * Configuration data for this switch.
+	 */
+	struct dsa_chip_data	*cd;
+
+	/*
+	 * The switch operations.
+	 */
+	const struct dsa_switch_ops	*ops;
+
+	/*
+	 * Slave mii_bus and devices for the individual ports.
+	 */
+	u32			phys_mii_mask;
+	struct mii_bus		*slave_mii_bus;
+
+	/* Ageing Time limits in msecs */
+	unsigned int ageing_time_min;
+	unsigned int ageing_time_max;
+
+	/* devlink used to represent this switch device */
+	struct devlink		*devlink;
+
+	/* Number of switch port queues */
+	unsigned int		num_tx_queues;
+
+	/* Disallow bridge core from requesting different VLAN awareness
+	 * settings on ports if not hardware-supported
+	 */
+	bool			vlan_filtering_is_global;
+
+	/* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges
+	 * that have vlan_filtering=0. All drivers should ideally set this (and
+	 * then the option would get removed), but it is unknown whether this
+	 * would break things or not.
+	 */
+	bool			configure_vlan_while_not_filtering;
+
+	/* If the switch driver always programs the CPU port as egress tagged
+	 * despite the VLAN configuration indicating otherwise, then setting
+	 * @untag_bridge_pvid will force the DSA receive path to pop the bridge's
+	 * default_pvid VLAN tagged frames to offer a consistent behavior
+	 * between a vlan_filtering=0 and vlan_filtering=1 bridge device.
+	 */
+	bool			untag_bridge_pvid;
+
+	/* In case vlan_filtering_is_global is set, the VLAN awareness state
+	 * should be retrieved from here and not from the per-port settings.
+	 */
+	bool			vlan_filtering;
+
+	/* MAC PCS does not provide link state change interrupt, and requires
+	 * polling. Flag passed on to PHYLINK.
+	 */
+	bool			pcs_poll;
+
+	/* For switches that only have the MRU configurable. To ensure the
+	 * configured MTU is not exceeded, normalization of MRU on all bridged
+	 * interfaces is needed.
+	 */
+	bool			mtu_enforcement_ingress;
+
+	size_t num_ports;
+};
+
+static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
+{
+	struct dsa_switch_tree *dst = ds->dst;
+	struct dsa_port *dp;
+
+	list_for_each_entry(dp, &dst->ports, list)
+		if (dp->ds == ds && dp->index == p)
+			return dp;
+
+	return NULL;
+}
+
+static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p)
+{
+	return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;
+}
+
+static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
+{
+	return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU;
+}
+
+static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
+{
+	return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA;
+}
+
+static inline bool dsa_is_user_port(struct dsa_switch *ds, int p)
+{
+	return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER;
+}
+
+static inline u32 dsa_user_ports(struct dsa_switch *ds)
+{
+	u32 mask = 0;
+	int p;
+
+	for (p = 0; p < ds->num_ports; p++)
+		if (dsa_is_user_port(ds, p))
+			mask |= BIT(p);
+
+	return mask;
+}
+
+/* Return the local port used to reach an arbitrary switch device */
+static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device)
+{
+	struct dsa_switch_tree *dst = ds->dst;
+	struct dsa_link *dl;
+
+	list_for_each_entry(dl, &dst->rtable, list)
+		if (dl->dp->ds == ds && dl->link_dp->ds->index == device)
+			return dl->dp->index;
+
+	return ds->num_ports;
+}
+
+/* Return the local port used to reach an arbitrary switch port */
+static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device,
+					    int port)
+{
+	if (device == ds->index)
+		return port;
+	else
+		return dsa_routing_port(ds, device);
+}
+
+/* Return the local port used to reach the dedicated CPU port */
+static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port)
+{
+	const struct dsa_port *dp = dsa_to_port(ds, port);
+	const struct dsa_port *cpu_dp = dp->cpu_dp;
+
+	if (!cpu_dp)
+		return port;
+
+	return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index);
+}
+
+static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp)
+{
+	const struct dsa_switch *ds = dp->ds;
+
+	if (ds->vlan_filtering_is_global)
+		return ds->vlan_filtering;
+	else
+		return dp->vlan_filtering;
+}
+
+typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
+			      bool is_static, void *data);
+struct dsa_switch_ops {
+	enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
+						  int port,
+						  enum dsa_tag_protocol mprot);
+
+	int	(*setup)(struct dsa_switch *ds);
+	void	(*teardown)(struct dsa_switch *ds);
+	u32	(*get_phy_flags)(struct dsa_switch *ds, int port);
+
+	/*
+	 * Access to the switch's PHY registers.
+	 */
+	int	(*phy_read)(struct dsa_switch *ds, int port, int regnum);
+	int	(*phy_write)(struct dsa_switch *ds, int port,
+			     int regnum, u16 val);
+
+	/*
+	 * Link state adjustment (called from libphy)
+	 */
+	void	(*adjust_link)(struct dsa_switch *ds, int port,
+				struct phy_device *phydev);
+	void	(*fixed_link_update)(struct dsa_switch *ds, int port,
+				struct fixed_phy_status *st);
+
+	/*
+	 * PHYLINK integration
+	 */
+	void	(*phylink_validate)(struct dsa_switch *ds, int port,
+				    unsigned long *supported,
+				    struct phylink_link_state *state);
+	int	(*phylink_mac_link_state)(struct dsa_switch *ds, int port,
+					  struct phylink_link_state *state);
+	void	(*phylink_mac_config)(struct dsa_switch *ds, int port,
+				      unsigned int mode,
+				      const struct phylink_link_state *state);
+	void	(*phylink_mac_an_restart)(struct dsa_switch *ds, int port);
+	void	(*phylink_mac_link_down)(struct dsa_switch *ds, int port,
+					 unsigned int mode,
+					 phy_interface_t interface);
+	void	(*phylink_mac_link_up)(struct dsa_switch *ds, int port,
+				       unsigned int mode,
+				       phy_interface_t interface,
+				       struct phy_device *phydev,
+				       int speed, int duplex,
+				       bool tx_pause, bool rx_pause);
+	void	(*phylink_fixed_state)(struct dsa_switch *ds, int port,
+				       struct phylink_link_state *state);
+	/*
+	 * ethtool hardware statistics.
+	 */
+	void	(*get_strings)(struct dsa_switch *ds, int port,
+			       u32 stringset, uint8_t *data);
+	void	(*get_ethtool_stats)(struct dsa_switch *ds,
+				     int port, uint64_t *data);
+	int	(*get_sset_count)(struct dsa_switch *ds, int port, int sset);
+	void	(*get_ethtool_phy_stats)(struct dsa_switch *ds,
+					 int port, uint64_t *data);
+
+	/*
+	 * ethtool Wake-on-LAN
+	 */
+	void	(*get_wol)(struct dsa_switch *ds, int port,
+			   struct ethtool_wolinfo *w);
+	int	(*set_wol)(struct dsa_switch *ds, int port,
+			   struct ethtool_wolinfo *w);
+
+	/*
+	 * ethtool timestamp info
+	 */
+	int	(*get_ts_info)(struct dsa_switch *ds, int port,
+			       struct ethtool_ts_info *ts);
+
+	/*
+	 * Suspend and resume
+	 */
+	int	(*suspend)(struct dsa_switch *ds);
+	int	(*resume)(struct dsa_switch *ds);
+
+	/*
+	 * Port enable/disable
+	 */
+	int	(*port_enable)(struct dsa_switch *ds, int port,
+			       struct phy_device *phy);
+	void	(*port_disable)(struct dsa_switch *ds, int port);
+
+	/*
+	 * Port's MAC EEE settings
+	 */
+	int	(*set_mac_eee)(struct dsa_switch *ds, int port,
+			       struct ethtool_eee *e);
+	int	(*get_mac_eee)(struct dsa_switch *ds, int port,
+			       struct ethtool_eee *e);
+
+	/* EEPROM access */
+	int	(*get_eeprom_len)(struct dsa_switch *ds);
+	int	(*get_eeprom)(struct dsa_switch *ds,
+			      struct ethtool_eeprom *eeprom, u8 *data);
+	int	(*set_eeprom)(struct dsa_switch *ds,
+			      struct ethtool_eeprom *eeprom, u8 *data);
+
+	/*
+	 * Register access.
+	 */
+	int	(*get_regs_len)(struct dsa_switch *ds, int port);
+	void	(*get_regs)(struct dsa_switch *ds, int port,
+			    struct ethtool_regs *regs, void *p);
+
+	/*
+	 * Bridge integration
+	 */
+	int	(*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
+	int	(*port_bridge_join)(struct dsa_switch *ds, int port,
+				    struct net_device *bridge);
+	void	(*port_bridge_leave)(struct dsa_switch *ds, int port,
+				     struct net_device *bridge);
+	void	(*port_stp_state_set)(struct dsa_switch *ds, int port,
+				      u8 state);
+	void	(*port_fast_age)(struct dsa_switch *ds, int port);
+	int	(*port_egress_floods)(struct dsa_switch *ds, int port,
+				      bool unicast, bool multicast);
+
+	/*
+	 * VLAN support
+	 */
+	int	(*port_vlan_filtering)(struct dsa_switch *ds, int port,
+				       bool vlan_filtering,
+				       struct switchdev_trans *trans);
+	int (*port_vlan_prepare)(struct dsa_switch *ds, int port,
+				 const struct switchdev_obj_port_vlan *vlan);
+	void (*port_vlan_add)(struct dsa_switch *ds, int port,
+			      const struct switchdev_obj_port_vlan *vlan);
+	int	(*port_vlan_del)(struct dsa_switch *ds, int port,
+				 const struct switchdev_obj_port_vlan *vlan);
+	/*
+	 * Forwarding database
+	 */
+	int	(*port_fdb_add)(struct dsa_switch *ds, int port,
+				const unsigned char *addr, u16 vid);
+	int	(*port_fdb_del)(struct dsa_switch *ds, int port,
+				const unsigned char *addr, u16 vid);
+	int	(*port_fdb_dump)(struct dsa_switch *ds, int port,
+				 dsa_fdb_dump_cb_t *cb, void *data);
+
+	/*
+	 * Multicast database
+	 */
+	int (*port_mdb_prepare)(struct dsa_switch *ds, int port,
+				const struct switchdev_obj_port_mdb *mdb);
+	void (*port_mdb_add)(struct dsa_switch *ds, int port,
+			     const struct switchdev_obj_port_mdb *mdb);
+	int	(*port_mdb_del)(struct dsa_switch *ds, int port,
+				const struct switchdev_obj_port_mdb *mdb);
+	/*
+	 * RXNFC
+	 */
+	int	(*get_rxnfc)(struct dsa_switch *ds, int port,
+			     struct ethtool_rxnfc *nfc, u32 *rule_locs);
+	int	(*set_rxnfc)(struct dsa_switch *ds, int port,
+			     struct ethtool_rxnfc *nfc);
+
+	/*
+	 * TC integration
+	 */
+	int	(*cls_flower_add)(struct dsa_switch *ds, int port,
+				  struct flow_cls_offload *cls, bool ingress);
+	int	(*cls_flower_del)(struct dsa_switch *ds, int port,
+				  struct flow_cls_offload *cls, bool ingress);
+	int	(*cls_flower_stats)(struct dsa_switch *ds, int port,
+				    struct flow_cls_offload *cls, bool ingress);
+	int	(*port_mirror_add)(struct dsa_switch *ds, int port,
+				   struct dsa_mall_mirror_tc_entry *mirror,
+				   bool ingress);
+	void	(*port_mirror_del)(struct dsa_switch *ds, int port,
+				   struct dsa_mall_mirror_tc_entry *mirror);
+	int	(*port_policer_add)(struct dsa_switch *ds, int port,
+				    struct dsa_mall_policer_tc_entry *policer);
+	void	(*port_policer_del)(struct dsa_switch *ds, int port);
+	int	(*port_setup_tc)(struct dsa_switch *ds, int port,
+				 enum tc_setup_type type, void *type_data);
+
+	/*
+	 * Cross-chip operations
+	 */
+	int	(*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index,
+					 int sw_index, int port,
+					 struct net_device *br);
+	void	(*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index,
+					  int sw_index, int port,
+					  struct net_device *br);
+
+	/*
+	 * PTP functionality
+	 */
+	int	(*port_hwtstamp_get)(struct dsa_switch *ds, int port,
+				     struct ifreq *ifr);
+	int	(*port_hwtstamp_set)(struct dsa_switch *ds, int port,
+				     struct ifreq *ifr);
+	bool	(*port_txtstamp)(struct dsa_switch *ds, int port,
+				 struct sk_buff *clone, unsigned int type);
+	bool	(*port_rxtstamp)(struct dsa_switch *ds, int port,
+				 struct sk_buff *skb, unsigned int type);
+
+	/* Devlink parameters, etc */
+	int	(*devlink_param_get)(struct dsa_switch *ds, u32 id,
+				     struct devlink_param_gset_ctx *ctx);
+	int	(*devlink_param_set)(struct dsa_switch *ds, u32 id,
+				     struct devlink_param_gset_ctx *ctx);
+	int	(*devlink_info_get)(struct dsa_switch *ds,
+				    struct devlink_info_req *req,
+				    struct netlink_ext_ack *extack);
+
+	/*
+	 * MTU change functionality. Switches can also adjust their MRU through
+	 * this method. By MTU, one understands the SDU (L2 payload) length.
+	 * If the switch needs to account for the DSA tag on the CPU port, this
+	 * method needs to do so privately.
+	 */
+	int	(*port_change_mtu)(struct dsa_switch *ds, int port,
+				   int new_mtu);
+	int	(*port_max_mtu)(struct dsa_switch *ds, int port);
+};
+
+#define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes)		\
+	DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes,		\
+			     dsa_devlink_param_get, dsa_devlink_param_set, NULL)
+
+int dsa_devlink_param_get(struct devlink *dl, u32 id,
+			  struct devlink_param_gset_ctx *ctx);
+int dsa_devlink_param_set(struct devlink *dl, u32 id,
+			  struct devlink_param_gset_ctx *ctx);
+int dsa_devlink_params_register(struct dsa_switch *ds,
+				const struct devlink_param *params,
+				size_t params_count);
+void dsa_devlink_params_unregister(struct dsa_switch *ds,
+				   const struct devlink_param *params,
+				   size_t params_count);
+int dsa_devlink_resource_register(struct dsa_switch *ds,
+				  const char *resource_name,
+				  u64 resource_size,
+				  u64 resource_id,
+				  u64 parent_resource_id,
+				  const struct devlink_resource_size_params *size_params);
+
+void dsa_devlink_resources_unregister(struct dsa_switch *ds);
+
+void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds,
+					   u64 resource_id,
+					   devlink_resource_occ_get_t *occ_get,
+					   void *occ_get_priv);
+void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds,
+					     u64 resource_id);
+struct devlink_region *
+dsa_devlink_region_create(struct dsa_switch *ds,
+			  const struct devlink_region_ops *ops,
+			  u32 region_max_snapshots, u64 region_size);
+struct devlink_region *
+dsa_devlink_port_region_create(struct dsa_switch *ds,
+			       int port,
+			       const struct devlink_port_region_ops *ops,
+			       u32 region_max_snapshots, u64 region_size);
+void dsa_devlink_region_destroy(struct devlink_region *region);
+
+struct dsa_port *dsa_port_from_netdev(struct net_device *netdev);
+
+struct dsa_devlink_priv {
+	struct dsa_switch *ds;
+};
+
+static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl)
+{
+	struct dsa_devlink_priv *dl_priv = devlink_priv(dl);
+
+	return dl_priv->ds;
+}
+
+static inline
+struct dsa_switch *dsa_devlink_port_to_ds(struct devlink_port *port)
+{
+	struct devlink *dl = port->devlink;
+	struct dsa_devlink_priv *dl_priv = devlink_priv(dl);
+
+	return dl_priv->ds;
+}
+
+static inline int dsa_devlink_port_to_port(struct devlink_port *port)
+{
+	return port->index;
+}
+
+struct dsa_switch_driver {
+	struct list_head	list;
+	const struct dsa_switch_ops *ops;
+};
+
+struct net_device *dsa_dev_to_net_device(struct device *dev);
+
+/* Keep inline for faster access in hot path */
+static inline bool netdev_uses_dsa(const struct net_device *dev)
+{
+#if IS_ENABLED(CONFIG_NET_DSA)
+	return dev->dsa_ptr && dev->dsa_ptr->rcv;
+#endif
+	return false;
+}
+
+static inline bool dsa_can_decode(const struct sk_buff *skb,
+				  struct net_device *dev)
+{
+#if IS_ENABLED(CONFIG_NET_DSA)
+	return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev);
+#endif
+	return false;
+}
+
+/* All DSA tags that push the EtherType to the right (basically all except tail
+ * tags, which don't break dissection) can be treated the same from the
+ * perspective of the flow dissector.
+ *
+ * We need to return:
+ *  - offset: the (B - A) difference between:
+ *    A. the position of the real EtherType and
+ *    B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes
+ *       after the normal EtherType was supposed to be)
+ *    The offset in bytes is exactly equal to the tagger overhead (and half of
+ *    that, in __be16 shorts).
+ *
+ *  - proto: the value of the real EtherType.
+ */
+static inline void dsa_tag_generic_flow_dissect(const struct sk_buff *skb,
+						__be16 *proto, int *offset)
+{
+#if IS_ENABLED(CONFIG_NET_DSA)
+	const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops;
+	int tag_len = ops->overhead;
+
+	*offset = tag_len;
+	*proto = ((__be16 *)skb->data)[(tag_len / 2) - 1];
+#endif
+}
+
+#if IS_ENABLED(CONFIG_NET_DSA)
+static inline int __dsa_netdevice_ops_check(struct net_device *dev)
+{
+	int err = -EOPNOTSUPP;
+
+	if (!dev->dsa_ptr)
+		return err;
+
+	if (!dev->dsa_ptr->netdev_ops)
+		return err;
+
+	return 0;
+}
+
+static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr,
+				   int cmd)
+{
+	const struct dsa_netdevice_ops *ops;
+	int err;
+
+	err = __dsa_netdevice_ops_check(dev);
+	if (err)
+		return err;
+
+	ops = dev->dsa_ptr->netdev_ops;
+
+	return ops->ndo_do_ioctl(dev, ifr, cmd);
+}
+#else
+static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr,
+				   int cmd)
+{
+	return -EOPNOTSUPP;
+}
+#endif
+
+void dsa_unregister_switch(struct dsa_switch *ds);
+int dsa_register_switch(struct dsa_switch *ds);
+struct dsa_switch *dsa_switch_find(int tree_index, int sw_index);
+#ifdef CONFIG_PM_SLEEP
+int dsa_switch_suspend(struct dsa_switch *ds);
+int dsa_switch_resume(struct dsa_switch *ds);
+#else
+static inline int dsa_switch_suspend(struct dsa_switch *ds)
+{
+	return 0;
+}
+static inline int dsa_switch_resume(struct dsa_switch *ds)
+{
+	return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+enum dsa_notifier_type {
+	DSA_PORT_REGISTER,
+	DSA_PORT_UNREGISTER,
+};
+
+struct dsa_notifier_info {
+	struct net_device *dev;
+};
+
+struct dsa_notifier_register_info {
+	struct dsa_notifier_info info;	/* must be first */
+	struct net_device *master;
+	unsigned int port_number;
+	unsigned int switch_number;
+};
+
+static inline struct net_device *
+dsa_notifier_info_to_dev(const struct dsa_notifier_info *info)
+{
+	return info->dev;
+}
+
+#if IS_ENABLED(CONFIG_NET_DSA)
+int register_dsa_notifier(struct notifier_block *nb);
+int unregister_dsa_notifier(struct notifier_block *nb);
+int call_dsa_notifiers(unsigned long val, struct net_device *dev,
+		       struct dsa_notifier_info *info);
+#else
+static inline int register_dsa_notifier(struct notifier_block *nb)
+{
+	return 0;
+}
+
+static inline int unregister_dsa_notifier(struct notifier_block *nb)
+{
+	return 0;
+}
+
+static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev,
+				     struct dsa_notifier_info *info)
+{
+	return NOTIFY_DONE;
+}
+#endif
+
+/* Broadcom tag specific helpers to insert and extract queue/port number */
+#define BRCM_TAG_SET_PORT_QUEUE(p, q)	((p) << 8 | q)
+#define BRCM_TAG_GET_PORT(v)		((v) >> 8)
+#define BRCM_TAG_GET_QUEUE(v)		((v) & 0xff)
+
+
+netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev);
+int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data);
+int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data);
+int dsa_port_get_phy_sset_count(struct dsa_port *dp);
+void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up);
+
+struct dsa_tag_driver {
+	const struct dsa_device_ops *ops;
+	struct list_head list;
+	struct module *owner;
+};
+
+void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[],
+			      unsigned int count,
+			      struct module *owner);
+void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[],
+				unsigned int count);
+
+#define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count)	\
+static int __init dsa_tag_driver_module_init(void)			\
+{									\
+	dsa_tag_drivers_register(__dsa_tag_drivers_array, __count,	\
+				 THIS_MODULE);				\
+	return 0;							\
+}									\
+module_init(dsa_tag_driver_module_init);				\
+									\
+static void __exit dsa_tag_driver_module_exit(void)			\
+{									\
+	dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count);	\
+}									\
+module_exit(dsa_tag_driver_module_exit)
+
+/**
+ * module_dsa_tag_drivers() - Helper macro for registering DSA tag
+ * drivers
+ * @__ops_array: Array of tag driver strucutres
+ *
+ * Helper macro for DSA tag drivers which do not do anything special
+ * in module init/exit. Each module may only use this macro once, and
+ * calling it replaces module_init() and module_exit().
+ */
+#define module_dsa_tag_drivers(__ops_array)				\
+dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array))
+
+#define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops
+
+/* Create a static structure we can build a linked list of dsa_tag
+ * drivers
+ */
+#define DSA_TAG_DRIVER(__ops)						\
+static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = {		\
+	.ops = &__ops,							\
+}
+
+/**
+ * module_dsa_tag_driver() - Helper macro for registering a single DSA tag
+ * driver
+ * @__ops: Single tag driver structures
+ *
+ * Helper macro for DSA tag drivers which do not do anything special
+ * in module init/exit. Each module may only use this macro once, and
+ * calling it replaces module_init() and module_exit().
+ */
+#define module_dsa_tag_driver(__ops)					\
+DSA_TAG_DRIVER(__ops);							\
+									\
+static struct dsa_tag_driver *dsa_tag_driver_array[] =	{		\
+	&DSA_TAG_DRIVER_NAME(__ops)					\
+};									\
+module_dsa_tag_drivers(dsa_tag_driver_array)
+#endif
+