v4.19.13 snapshot.
diff --git a/include/net/dsa.h b/include/net/dsa.h
new file mode 100644
index 0000000..461e8a7
--- /dev/null
+++ b/include/net/dsa.h
@@ -0,0 +1,627 @@
+/*
+ * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
+ * Copyright (c) 2008-2009 Marvell Semiconductor
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#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 <net/devlink.h>
+#include <net/switchdev.h>
+
+struct tc_action;
+struct phy_device;
+struct fixed_phy_status;
+struct phylink_link_state;
+
+enum dsa_tag_protocol {
+ DSA_TAG_PROTO_NONE = 0,
+ DSA_TAG_PROTO_BRCM,
+ DSA_TAG_PROTO_BRCM_PREPEND,
+ DSA_TAG_PROTO_DSA,
+ DSA_TAG_PROTO_EDSA,
+ DSA_TAG_PROTO_KSZ,
+ DSA_TAG_PROTO_LAN9303,
+ DSA_TAG_PROTO_MTK,
+ DSA_TAG_PROTO_QCA,
+ DSA_TAG_PROTO_TRAILER,
+ DSA_TAG_LAST, /* MUST BE LAST */
+};
+
+#define DSA_MAX_SWITCHES 4
+#define DSA_MAX_PORTS 12
+
+#define DSA_RTABLE_NONE -1
+
+struct dsa_chip_data {
+ /*
+ * How to access the switch configuration registers.
+ */
+ struct device *host_dev;
+ int sw_addr;
+
+ /*
+ * Reference to network devices
+ */
+ struct device *netdev[DSA_MAX_PORTS];
+
+ /* set to size of eeprom if supported by the switch */
+ int eeprom_len;
+
+ /* Device tree node pointer for this specific switch chip
+ * used during switch setup in case additional properties
+ * and resources needs to be used
+ */
+ struct device_node *of_node;
+
+ /*
+ * The names of the switch's ports. Use "cpu" to
+ * designate the switch port that the cpu is connected to,
+ * "dsa" to indicate that this port is a DSA link to
+ * another switch, NULL to indicate the port is unused,
+ * or any other string to indicate this is a physical port.
+ */
+ char *port_names[DSA_MAX_PORTS];
+ struct device_node *port_dn[DSA_MAX_PORTS];
+
+ /*
+ * An array of which element [a] indicates which port on this
+ * switch should be used to send packets to that are destined
+ * for switch a. Can be NULL if there is only one switch chip.
+ */
+ s8 rtable[DSA_MAX_SWITCHES];
+};
+
+struct dsa_platform_data {
+ /*
+ * Reference to a Linux network interface that connects
+ * to the root switch chip of the tree.
+ */
+ struct device *netdev;
+ struct net_device *of_netdev;
+
+ /*
+ * Info structs describing each of the switch chips
+ * connected via this network interface.
+ */
+ int nr_chips;
+ struct dsa_chip_data *chip;
+};
+
+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);
+};
+
+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;
+
+ /*
+ * The switch port to which the CPU is attached.
+ */
+ struct dsa_port *cpu_dp;
+
+ /*
+ * Data for the individual switch chips.
+ */
+ struct dsa_switch *ds[DSA_MAX_SWITCHES];
+};
+
+/* TC matchall action types, only mirroring for now */
+enum dsa_port_mall_action_type {
+ DSA_PORT_MALL_MIRROR,
+};
+
+/* TC mirroring entry */
+struct dsa_mall_mirror_tc_entry {
+ u8 to_local_port;
+ bool ingress;
+};
+
+/* 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_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);
+
+ 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;
+ const struct dsa_port *cpu_dp;
+ struct device_node *dn;
+ unsigned int ageing_time;
+ u8 stp_state;
+ struct net_device *bridge_dev;
+ struct devlink_port devlink_port;
+ struct phylink *pl;
+ /*
+ * Original copy of the master netdev ethtool_ops
+ */
+ const struct ethtool_ops *orig_ethtool_ops;
+};
+
+struct dsa_switch {
+ 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;
+
+ /*
+ * An array of which element [a] indicates which port on this
+ * switch should be used to send packets to that are destined
+ * for switch a. Can be NULL if there is only one switch chip.
+ */
+ s8 rtable[DSA_MAX_SWITCHES];
+
+ /*
+ * 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;
+
+ unsigned long *bitmap;
+ unsigned long _bitmap;
+
+ /* Dynamically allocated ports, keep last */
+ size_t num_ports;
+ struct dsa_port ports[];
+};
+
+static inline const struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
+{
+ return &ds->ports[p];
+}
+
+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 port */
+static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device,
+ int port)
+{
+ if (device == ds->index)
+ return port;
+ else
+ return ds->rtable[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);
+}
+
+typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
+ bool is_static, void *data);
+struct dsa_switch_ops {
+#if IS_ENABLED(CONFIG_NET_DSA_LEGACY)
+ /*
+ * Legacy probing.
+ */
+ const char *(*probe)(struct device *dsa_dev,
+ struct device *host_dev, int sw_addr,
+ void **priv);
+#endif
+
+ enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
+ int port);
+
+ int (*setup)(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);
+ 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,
+ struct phy_device *phy);
+
+ /*
+ * 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);
+
+ /*
+ * VLAN support
+ */
+ int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
+ bool vlan_filtering);
+ 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 (*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);
+
+ /*
+ * Cross-chip operations
+ */
+ int (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index,
+ int port, struct net_device *br);
+ void (*crosschip_bridge_leave)(struct dsa_switch *ds, 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);
+};
+
+struct dsa_switch_driver {
+ struct list_head list;
+ const struct dsa_switch_ops *ops;
+};
+
+#if IS_ENABLED(CONFIG_NET_DSA_LEGACY)
+/* Legacy driver registration */
+void register_switch_driver(struct dsa_switch_driver *type);
+void unregister_switch_driver(struct dsa_switch_driver *type);
+struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev);
+
+#else
+static inline void register_switch_driver(struct dsa_switch_driver *type) { }
+static inline void unregister_switch_driver(struct dsa_switch_driver *type) { }
+static inline struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev)
+{
+ return NULL;
+}
+#endif
+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(struct net_device *dev)
+{
+#if IS_ENABLED(CONFIG_NET_DSA)
+ return dev->dsa_ptr && dev->dsa_ptr->rcv;
+#endif
+ return false;
+}
+
+struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n);
+void dsa_unregister_switch(struct dsa_switch *ds);
+int dsa_register_switch(struct dsa_switch *ds);
+#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)
+
+
+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);
+
+#endif