/* 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);	int (*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;}; /* 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;	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; 	/* 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

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