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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /include/net/dsa.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/net/dsa.h')
-rw-r--r--include/net/dsa.h1472
1 files changed, 1472 insertions, 0 deletions
diff --git a/include/net/dsa.h b/include/net/dsa.h
new file mode 100644
index 000000000..ee369670e
--- /dev/null
+++ b/include/net/dsa.h
@@ -0,0 +1,1472 @@
+/* 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
+#define DSA_TAG_PROTO_HELLCREEK_VALUE 18
+#define DSA_TAG_PROTO_XRS700X_VALUE 19
+#define DSA_TAG_PROTO_OCELOT_8021Q_VALUE 20
+#define DSA_TAG_PROTO_SEVILLE_VALUE 21
+#define DSA_TAG_PROTO_BRCM_LEGACY_VALUE 22
+#define DSA_TAG_PROTO_SJA1110_VALUE 23
+#define DSA_TAG_PROTO_RTL8_4_VALUE 24
+#define DSA_TAG_PROTO_RTL8_4T_VALUE 25
+#define DSA_TAG_PROTO_RZN1_A5PSW_VALUE 26
+#define DSA_TAG_PROTO_LAN937X_VALUE 27
+
+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_LEGACY = DSA_TAG_PROTO_BRCM_LEGACY_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,
+ DSA_TAG_PROTO_HELLCREEK = DSA_TAG_PROTO_HELLCREEK_VALUE,
+ DSA_TAG_PROTO_XRS700X = DSA_TAG_PROTO_XRS700X_VALUE,
+ DSA_TAG_PROTO_OCELOT_8021Q = DSA_TAG_PROTO_OCELOT_8021Q_VALUE,
+ DSA_TAG_PROTO_SEVILLE = DSA_TAG_PROTO_SEVILLE_VALUE,
+ DSA_TAG_PROTO_SJA1110 = DSA_TAG_PROTO_SJA1110_VALUE,
+ DSA_TAG_PROTO_RTL8_4 = DSA_TAG_PROTO_RTL8_4_VALUE,
+ DSA_TAG_PROTO_RTL8_4T = DSA_TAG_PROTO_RTL8_4T_VALUE,
+ DSA_TAG_PROTO_RZN1_A5PSW = DSA_TAG_PROTO_RZN1_A5PSW_VALUE,
+ DSA_TAG_PROTO_LAN937X = DSA_TAG_PROTO_LAN937X_VALUE,
+};
+
+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);
+ void (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
+ int *offset);
+ int (*connect)(struct dsa_switch *ds);
+ void (*disconnect)(struct dsa_switch *ds);
+ unsigned int needed_headroom;
+ unsigned int needed_tailroom;
+ 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;
+};
+
+/* 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_eth_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_lag {
+ struct net_device *dev;
+ unsigned int id;
+ struct mutex fdb_lock;
+ struct list_head fdbs;
+ refcount_t refcount;
+};
+
+struct dsa_switch_tree {
+ struct list_head list;
+
+ /* List of switch ports */
+ struct list_head ports;
+
+ /* 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;
+
+ /* Maps offloaded LAG netdevs to a zero-based linear ID for
+ * drivers that need it.
+ */
+ struct dsa_lag **lags;
+
+ /* Tagging protocol operations */
+ const struct dsa_device_ops *tag_ops;
+
+ /* Default tagging protocol preferred by the switches in this
+ * tree.
+ */
+ enum dsa_tag_protocol default_proto;
+
+ /* 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 DSA links composing the routing table */
+ struct list_head rtable;
+
+ /* Length of "lags" array */
+ unsigned int lags_len;
+
+ /* Track the largest switch index within a tree */
+ unsigned int last_switch;
+};
+
+/* LAG IDs are one-based, the dst->lags array is zero-based */
+#define dsa_lags_foreach_id(_id, _dst) \
+ for ((_id) = 1; (_id) <= (_dst)->lags_len; (_id)++) \
+ if ((_dst)->lags[(_id) - 1])
+
+#define dsa_lag_foreach_port(_dp, _dst, _lag) \
+ list_for_each_entry((_dp), &(_dst)->ports, list) \
+ if (dsa_port_offloads_lag((_dp), (_lag)))
+
+#define dsa_hsr_foreach_port(_dp, _ds, _hsr) \
+ list_for_each_entry((_dp), &(_ds)->dst->ports, list) \
+ if ((_dp)->ds == (_ds) && (_dp)->hsr_dev == (_hsr))
+
+static inline struct dsa_lag *dsa_lag_by_id(struct dsa_switch_tree *dst,
+ unsigned int id)
+{
+ /* DSA LAG IDs are one-based, dst->lags is zero-based */
+ return dst->lags[id - 1];
+}
+
+static inline int dsa_lag_id(struct dsa_switch_tree *dst,
+ struct net_device *lag_dev)
+{
+ unsigned int id;
+
+ dsa_lags_foreach_id(id, dst) {
+ struct dsa_lag *lag = dsa_lag_by_id(dst, id);
+
+ if (lag->dev == lag_dev)
+ return lag->id;
+ }
+
+ return -ENODEV;
+}
+
+/* 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_bridge {
+ struct net_device *dev;
+ unsigned int num;
+ bool tx_fwd_offload;
+ refcount_t refcount;
+};
+
+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;
+ };
+
+ /* Copy of the tagging protocol operations, for quicker access
+ * in the data path. Valid only for the CPU ports.
+ */
+ 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 dsa_switch *ds;
+
+ unsigned int index;
+
+ enum {
+ DSA_PORT_TYPE_UNUSED = 0,
+ DSA_PORT_TYPE_CPU,
+ DSA_PORT_TYPE_DSA,
+ DSA_PORT_TYPE_USER,
+ } type;
+
+ const char *name;
+ struct dsa_port *cpu_dp;
+ u8 mac[ETH_ALEN];
+
+ u8 stp_state;
+
+ /* Warning: the following bit fields are not atomic, and updating them
+ * can only be done from code paths where concurrency is not possible
+ * (probe time or under rtnl_lock).
+ */
+ u8 vlan_filtering:1;
+
+ /* Managed by DSA on user ports and by drivers on CPU and DSA ports */
+ u8 learning:1;
+
+ u8 lag_tx_enabled:1;
+
+ /* Master state bits, valid only on CPU ports */
+ u8 master_admin_up:1;
+ u8 master_oper_up:1;
+
+ /* Valid only on user ports */
+ u8 cpu_port_in_lag:1;
+
+ u8 setup:1;
+
+ struct device_node *dn;
+ unsigned int ageing_time;
+
+ struct dsa_bridge *bridge;
+ struct devlink_port devlink_port;
+ struct phylink *pl;
+ struct phylink_config pl_config;
+ struct dsa_lag *lag;
+ struct net_device *hsr_dev;
+
+ struct list_head list;
+
+ /*
+ * 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;
+
+ /* List of MAC addresses that must be forwarded on this port.
+ * These are only valid on CPU ports and DSA links.
+ */
+ struct mutex addr_lists_lock;
+ struct list_head fdbs;
+ struct list_head mdbs;
+
+ /* List of VLANs that CPU and DSA ports are members of. */
+ struct mutex vlans_lock;
+ struct list_head vlans;
+};
+
+/* 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;
+};
+
+enum dsa_db_type {
+ DSA_DB_PORT,
+ DSA_DB_LAG,
+ DSA_DB_BRIDGE,
+};
+
+struct dsa_db {
+ enum dsa_db_type type;
+
+ union {
+ const struct dsa_port *dp;
+ struct dsa_lag lag;
+ struct dsa_bridge bridge;
+ };
+};
+
+struct dsa_mac_addr {
+ unsigned char addr[ETH_ALEN];
+ u16 vid;
+ refcount_t refcount;
+ struct list_head list;
+ struct dsa_db db;
+};
+
+struct dsa_vlan {
+ u16 vid;
+ refcount_t refcount;
+ struct list_head list;
+};
+
+struct dsa_switch {
+ struct device *dev;
+
+ /*
+ * Parent switch tree, and switch index.
+ */
+ struct dsa_switch_tree *dst;
+ unsigned int index;
+
+ /* Warning: the following bit fields are not atomic, and updating them
+ * can only be done from code paths where concurrency is not possible
+ * (probe time or under rtnl_lock).
+ */
+ u32 setup:1;
+
+ /* Disallow bridge core from requesting different VLAN awareness
+ * settings on ports if not hardware-supported
+ */
+ u32 vlan_filtering_is_global:1;
+
+ /* Keep VLAN filtering enabled on ports not offloading any upper */
+ u32 needs_standalone_vlan_filtering:1;
+
+ /* 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.
+ */
+ u32 configure_vlan_while_not_filtering:1;
+
+ /* 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.
+ */
+ u32 untag_bridge_pvid:1;
+
+ /* Let DSA manage the FDB entries towards the
+ * CPU, based on the software bridge database.
+ */
+ u32 assisted_learning_on_cpu_port:1;
+
+ /* In case vlan_filtering_is_global is set, the VLAN awareness state
+ * should be retrieved from here and not from the per-port settings.
+ */
+ u32 vlan_filtering:1;
+
+ /* 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.
+ */
+ u32 mtu_enforcement_ingress:1;
+
+ /* Drivers that isolate the FDBs of multiple bridges must set this
+ * to true to receive the bridge as an argument in .port_fdb_{add,del}
+ * and .port_mdb_{add,del}. Otherwise, the bridge.num will always be
+ * passed as zero.
+ */
+ u32 fdb_isolation:1;
+
+ /* Listener for switch fabric events */
+ struct notifier_block nb;
+
+ /*
+ * Give the switch driver somewhere to hang its private data
+ * structure.
+ */
+ void *priv;
+
+ void *tagger_data;
+
+ /*
+ * 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;
+
+ /* Storage for drivers using tag_8021q */
+ struct dsa_8021q_context *tag_8021q_ctx;
+
+ /* devlink used to represent this switch device */
+ struct devlink *devlink;
+
+ /* Number of switch port queues */
+ unsigned int num_tx_queues;
+
+ /* Drivers that benefit from having an ID associated with each
+ * offloaded LAG should set this to the maximum number of
+ * supported IDs. DSA will then maintain a mapping of _at
+ * least_ these many IDs, accessible to drivers via
+ * dsa_lag_id().
+ */
+ unsigned int num_lag_ids;
+
+ /* Drivers that support bridge forwarding offload or FDB isolation
+ * should set this to the maximum number of bridges spanning the same
+ * switch tree (or all trees, in the case of cross-tree bridging
+ * support) that can be offloaded.
+ */
+ unsigned int max_num_bridges;
+
+ unsigned int 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_port_is_dsa(struct dsa_port *port)
+{
+ return port->type == DSA_PORT_TYPE_DSA;
+}
+
+static inline bool dsa_port_is_cpu(struct dsa_port *port)
+{
+ return port->type == DSA_PORT_TYPE_CPU;
+}
+
+static inline bool dsa_port_is_user(struct dsa_port *dp)
+{
+ return dp->type == DSA_PORT_TYPE_USER;
+}
+
+static inline bool dsa_port_is_unused(struct dsa_port *dp)
+{
+ return dp->type == DSA_PORT_TYPE_UNUSED;
+}
+
+static inline bool dsa_port_master_is_operational(struct dsa_port *dp)
+{
+ return dsa_port_is_cpu(dp) && dp->master_admin_up &&
+ dp->master_oper_up;
+}
+
+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;
+}
+
+#define dsa_tree_for_each_user_port(_dp, _dst) \
+ list_for_each_entry((_dp), &(_dst)->ports, list) \
+ if (dsa_port_is_user((_dp)))
+
+#define dsa_tree_for_each_user_port_continue_reverse(_dp, _dst) \
+ list_for_each_entry_continue_reverse((_dp), &(_dst)->ports, list) \
+ if (dsa_port_is_user((_dp)))
+
+#define dsa_tree_for_each_cpu_port(_dp, _dst) \
+ list_for_each_entry((_dp), &(_dst)->ports, list) \
+ if (dsa_port_is_cpu((_dp)))
+
+#define dsa_switch_for_each_port(_dp, _ds) \
+ list_for_each_entry((_dp), &(_ds)->dst->ports, list) \
+ if ((_dp)->ds == (_ds))
+
+#define dsa_switch_for_each_port_safe(_dp, _next, _ds) \
+ list_for_each_entry_safe((_dp), (_next), &(_ds)->dst->ports, list) \
+ if ((_dp)->ds == (_ds))
+
+#define dsa_switch_for_each_port_continue_reverse(_dp, _ds) \
+ list_for_each_entry_continue_reverse((_dp), &(_ds)->dst->ports, list) \
+ if ((_dp)->ds == (_ds))
+
+#define dsa_switch_for_each_available_port(_dp, _ds) \
+ dsa_switch_for_each_port((_dp), (_ds)) \
+ if (!dsa_port_is_unused((_dp)))
+
+#define dsa_switch_for_each_user_port(_dp, _ds) \
+ dsa_switch_for_each_port((_dp), (_ds)) \
+ if (dsa_port_is_user((_dp)))
+
+#define dsa_switch_for_each_cpu_port(_dp, _ds) \
+ dsa_switch_for_each_port((_dp), (_ds)) \
+ if (dsa_port_is_cpu((_dp)))
+
+#define dsa_switch_for_each_cpu_port_continue_reverse(_dp, _ds) \
+ dsa_switch_for_each_port_continue_reverse((_dp), (_ds)) \
+ if (dsa_port_is_cpu((_dp)))
+
+static inline u32 dsa_user_ports(struct dsa_switch *ds)
+{
+ struct dsa_port *dp;
+ u32 mask = 0;
+
+ dsa_switch_for_each_user_port(dp, ds)
+ mask |= BIT(dp->index);
+
+ return mask;
+}
+
+static inline u32 dsa_cpu_ports(struct dsa_switch *ds)
+{
+ struct dsa_port *cpu_dp;
+ u32 mask = 0;
+
+ dsa_switch_for_each_cpu_port(cpu_dp, ds)
+ mask |= BIT(cpu_dp->index);
+
+ 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);
+}
+
+/* Return true if this is the local port used to reach the CPU port */
+static inline bool dsa_is_upstream_port(struct dsa_switch *ds, int port)
+{
+ if (dsa_is_unused_port(ds, port))
+ return false;
+
+ return port == dsa_upstream_port(ds, port);
+}
+
+/* Return true if this is a DSA port leading away from the CPU */
+static inline bool dsa_is_downstream_port(struct dsa_switch *ds, int port)
+{
+ return dsa_is_dsa_port(ds, port) && !dsa_is_upstream_port(ds, port);
+}
+
+/* Return the local port used to reach the CPU port */
+static inline unsigned int dsa_switch_upstream_port(struct dsa_switch *ds)
+{
+ struct dsa_port *dp;
+
+ dsa_switch_for_each_available_port(dp, ds) {
+ return dsa_upstream_port(ds, dp->index);
+ }
+
+ return ds->num_ports;
+}
+
+/* Return true if @upstream_ds is an upstream switch of @downstream_ds, meaning
+ * that the routing port from @downstream_ds to @upstream_ds is also the port
+ * which @downstream_ds uses to reach its dedicated CPU.
+ */
+static inline bool dsa_switch_is_upstream_of(struct dsa_switch *upstream_ds,
+ struct dsa_switch *downstream_ds)
+{
+ int routing_port;
+
+ if (upstream_ds == downstream_ds)
+ return true;
+
+ routing_port = dsa_routing_port(downstream_ds, upstream_ds->index);
+
+ return dsa_is_upstream_port(downstream_ds, routing_port);
+}
+
+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;
+}
+
+static inline unsigned int dsa_port_lag_id_get(struct dsa_port *dp)
+{
+ return dp->lag ? dp->lag->id : 0;
+}
+
+static inline struct net_device *dsa_port_lag_dev_get(struct dsa_port *dp)
+{
+ return dp->lag ? dp->lag->dev : NULL;
+}
+
+static inline bool dsa_port_offloads_lag(struct dsa_port *dp,
+ const struct dsa_lag *lag)
+{
+ return dsa_port_lag_dev_get(dp) == lag->dev;
+}
+
+static inline struct net_device *dsa_port_to_master(const struct dsa_port *dp)
+{
+ if (dp->cpu_port_in_lag)
+ return dsa_port_lag_dev_get(dp->cpu_dp);
+
+ return dp->cpu_dp->master;
+}
+
+static inline
+struct net_device *dsa_port_to_bridge_port(const struct dsa_port *dp)
+{
+ if (!dp->bridge)
+ return NULL;
+
+ if (dp->lag)
+ return dp->lag->dev;
+ else if (dp->hsr_dev)
+ return dp->hsr_dev;
+
+ return dp->slave;
+}
+
+static inline struct net_device *
+dsa_port_bridge_dev_get(const struct dsa_port *dp)
+{
+ return dp->bridge ? dp->bridge->dev : NULL;
+}
+
+static inline unsigned int dsa_port_bridge_num_get(struct dsa_port *dp)
+{
+ return dp->bridge ? dp->bridge->num : 0;
+}
+
+static inline bool dsa_port_bridge_same(const struct dsa_port *a,
+ const struct dsa_port *b)
+{
+ struct net_device *br_a = dsa_port_bridge_dev_get(a);
+ struct net_device *br_b = dsa_port_bridge_dev_get(b);
+
+ /* Standalone ports are not in the same bridge with one another */
+ return (!br_a || !br_b) ? false : (br_a == br_b);
+}
+
+static inline bool dsa_port_offloads_bridge_port(struct dsa_port *dp,
+ const struct net_device *dev)
+{
+ return dsa_port_to_bridge_port(dp) == dev;
+}
+
+static inline bool
+dsa_port_offloads_bridge_dev(struct dsa_port *dp,
+ const struct net_device *bridge_dev)
+{
+ /* DSA ports connected to a bridge, and event was emitted
+ * for the bridge.
+ */
+ return dsa_port_bridge_dev_get(dp) == bridge_dev;
+}
+
+static inline bool dsa_port_offloads_bridge(struct dsa_port *dp,
+ const struct dsa_bridge *bridge)
+{
+ return dsa_port_bridge_dev_get(dp) == bridge->dev;
+}
+
+/* Returns true if any port of this tree offloads the given net_device */
+static inline bool dsa_tree_offloads_bridge_port(struct dsa_switch_tree *dst,
+ const struct net_device *dev)
+{
+ struct dsa_port *dp;
+
+ list_for_each_entry(dp, &dst->ports, list)
+ if (dsa_port_offloads_bridge_port(dp, dev))
+ return true;
+
+ return false;
+}
+
+/* Returns true if any port of this tree offloads the given bridge */
+static inline bool
+dsa_tree_offloads_bridge_dev(struct dsa_switch_tree *dst,
+ const struct net_device *bridge_dev)
+{
+ struct dsa_port *dp;
+
+ list_for_each_entry(dp, &dst->ports, list)
+ if (dsa_port_offloads_bridge_dev(dp, bridge_dev))
+ return true;
+
+ return false;
+}
+
+static inline bool dsa_port_tree_same(const struct dsa_port *a,
+ const struct dsa_port *b)
+{
+ return a->ds->dst == b->ds->dst;
+}
+
+typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
+ bool is_static, void *data);
+struct dsa_switch_ops {
+ /*
+ * Tagging protocol helpers called for the CPU ports and DSA links.
+ * @get_tag_protocol retrieves the initial tagging protocol and is
+ * mandatory. Switches which can operate using multiple tagging
+ * protocols should implement @change_tag_protocol and report in
+ * @get_tag_protocol the tagger in current use.
+ */
+ enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
+ int port,
+ enum dsa_tag_protocol mprot);
+ int (*change_tag_protocol)(struct dsa_switch *ds,
+ enum dsa_tag_protocol proto);
+ /*
+ * Method for switch drivers to connect to the tagging protocol driver
+ * in current use. The switch driver can provide handlers for certain
+ * types of packets for switch management.
+ */
+ int (*connect_tag_protocol)(struct dsa_switch *ds,
+ enum dsa_tag_protocol proto);
+
+ int (*port_change_master)(struct dsa_switch *ds, int port,
+ struct net_device *master,
+ struct netlink_ext_ack *extack);
+
+ /* Optional switch-wide initialization and destruction methods */
+ int (*setup)(struct dsa_switch *ds);
+ void (*teardown)(struct dsa_switch *ds);
+
+ /* Per-port initialization and destruction methods. Mandatory if the
+ * driver registers devlink port regions, optional otherwise.
+ */
+ int (*port_setup)(struct dsa_switch *ds, int port);
+ void (*port_teardown)(struct dsa_switch *ds, int port);
+
+ 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_get_caps)(struct dsa_switch *ds, int port,
+ struct phylink_config *config);
+ void (*phylink_validate)(struct dsa_switch *ds, int port,
+ unsigned long *supported,
+ struct phylink_link_state *state);
+ struct phylink_pcs *(*phylink_mac_select_pcs)(struct dsa_switch *ds,
+ int port,
+ phy_interface_t iface);
+ 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);
+ /*
+ * Port statistics counters.
+ */
+ 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);
+ void (*get_eth_phy_stats)(struct dsa_switch *ds, int port,
+ struct ethtool_eth_phy_stats *phy_stats);
+ void (*get_eth_mac_stats)(struct dsa_switch *ds, int port,
+ struct ethtool_eth_mac_stats *mac_stats);
+ void (*get_eth_ctrl_stats)(struct dsa_switch *ds, int port,
+ struct ethtool_eth_ctrl_stats *ctrl_stats);
+ void (*get_rmon_stats)(struct dsa_switch *ds, int port,
+ struct ethtool_rmon_stats *rmon_stats,
+ const struct ethtool_rmon_hist_range **ranges);
+ void (*get_stats64)(struct dsa_switch *ds, int port,
+ struct rtnl_link_stats64 *s);
+ void (*get_pause_stats)(struct dsa_switch *ds, int port,
+ struct ethtool_pause_stats *pause_stats);
+ void (*self_test)(struct dsa_switch *ds, int port,
+ struct ethtool_test *etest, u64 *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);
+
+ /*
+ * DCB ops
+ */
+ int (*port_get_default_prio)(struct dsa_switch *ds, int port);
+ int (*port_set_default_prio)(struct dsa_switch *ds, int port,
+ u8 prio);
+ int (*port_get_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp);
+ int (*port_add_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp,
+ u8 prio);
+ int (*port_del_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp,
+ u8 prio);
+
+ /*
+ * 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);
+
+ /*
+ * Upper device tracking.
+ */
+ int (*port_prechangeupper)(struct dsa_switch *ds, int port,
+ struct netdev_notifier_changeupper_info *info);
+
+ /*
+ * Bridge integration
+ */
+ int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
+ int (*port_bridge_join)(struct dsa_switch *ds, int port,
+ struct dsa_bridge bridge,
+ bool *tx_fwd_offload,
+ struct netlink_ext_ack *extack);
+ void (*port_bridge_leave)(struct dsa_switch *ds, int port,
+ struct dsa_bridge bridge);
+ void (*port_stp_state_set)(struct dsa_switch *ds, int port,
+ u8 state);
+ int (*port_mst_state_set)(struct dsa_switch *ds, int port,
+ const struct switchdev_mst_state *state);
+ void (*port_fast_age)(struct dsa_switch *ds, int port);
+ int (*port_vlan_fast_age)(struct dsa_switch *ds, int port, u16 vid);
+ int (*port_pre_bridge_flags)(struct dsa_switch *ds, int port,
+ struct switchdev_brport_flags flags,
+ struct netlink_ext_ack *extack);
+ int (*port_bridge_flags)(struct dsa_switch *ds, int port,
+ struct switchdev_brport_flags flags,
+ struct netlink_ext_ack *extack);
+ void (*port_set_host_flood)(struct dsa_switch *ds, int port,
+ bool uc, bool mc);
+
+ /*
+ * VLAN support
+ */
+ int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
+ bool vlan_filtering,
+ struct netlink_ext_ack *extack);
+ int (*port_vlan_add)(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_vlan *vlan,
+ struct netlink_ext_ack *extack);
+ int (*port_vlan_del)(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_vlan *vlan);
+ int (*vlan_msti_set)(struct dsa_switch *ds, struct dsa_bridge bridge,
+ const struct switchdev_vlan_msti *msti);
+
+ /*
+ * Forwarding database
+ */
+ int (*port_fdb_add)(struct dsa_switch *ds, int port,
+ const unsigned char *addr, u16 vid,
+ struct dsa_db db);
+ int (*port_fdb_del)(struct dsa_switch *ds, int port,
+ const unsigned char *addr, u16 vid,
+ struct dsa_db db);
+ int (*port_fdb_dump)(struct dsa_switch *ds, int port,
+ dsa_fdb_dump_cb_t *cb, void *data);
+ int (*lag_fdb_add)(struct dsa_switch *ds, struct dsa_lag lag,
+ const unsigned char *addr, u16 vid,
+ struct dsa_db db);
+ int (*lag_fdb_del)(struct dsa_switch *ds, struct dsa_lag lag,
+ const unsigned char *addr, u16 vid,
+ struct dsa_db db);
+
+ /*
+ * Multicast database
+ */
+ int (*port_mdb_add)(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb,
+ struct dsa_db db);
+ int (*port_mdb_del)(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb,
+ struct dsa_db db);
+ /*
+ * 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, struct netlink_ext_ack *extack);
+ 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 dsa_bridge bridge,
+ struct netlink_ext_ack *extack);
+ void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index,
+ int sw_index, int port,
+ struct dsa_bridge bridge);
+ int (*crosschip_lag_change)(struct dsa_switch *ds, int sw_index,
+ int port);
+ int (*crosschip_lag_join)(struct dsa_switch *ds, int sw_index,
+ int port, struct dsa_lag lag,
+ struct netdev_lag_upper_info *info,
+ struct netlink_ext_ack *extack);
+ int (*crosschip_lag_leave)(struct dsa_switch *ds, int sw_index,
+ int port, struct dsa_lag lag);
+
+ /*
+ * 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);
+ void (*port_txtstamp)(struct dsa_switch *ds, int port,
+ struct sk_buff *skb);
+ 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);
+ int (*devlink_sb_pool_get)(struct dsa_switch *ds,
+ unsigned int sb_index, u16 pool_index,
+ struct devlink_sb_pool_info *pool_info);
+ int (*devlink_sb_pool_set)(struct dsa_switch *ds, unsigned int sb_index,
+ u16 pool_index, u32 size,
+ enum devlink_sb_threshold_type threshold_type,
+ struct netlink_ext_ack *extack);
+ int (*devlink_sb_port_pool_get)(struct dsa_switch *ds, int port,
+ unsigned int sb_index, u16 pool_index,
+ u32 *p_threshold);
+ int (*devlink_sb_port_pool_set)(struct dsa_switch *ds, int port,
+ unsigned int sb_index, u16 pool_index,
+ u32 threshold,
+ struct netlink_ext_ack *extack);
+ int (*devlink_sb_tc_pool_bind_get)(struct dsa_switch *ds, int port,
+ unsigned int sb_index, u16 tc_index,
+ enum devlink_sb_pool_type pool_type,
+ u16 *p_pool_index, u32 *p_threshold);
+ int (*devlink_sb_tc_pool_bind_set)(struct dsa_switch *ds, int port,
+ unsigned int sb_index, u16 tc_index,
+ enum devlink_sb_pool_type pool_type,
+ u16 pool_index, u32 threshold,
+ struct netlink_ext_ack *extack);
+ int (*devlink_sb_occ_snapshot)(struct dsa_switch *ds,
+ unsigned int sb_index);
+ int (*devlink_sb_occ_max_clear)(struct dsa_switch *ds,
+ unsigned int sb_index);
+ int (*devlink_sb_occ_port_pool_get)(struct dsa_switch *ds, int port,
+ unsigned int sb_index, u16 pool_index,
+ u32 *p_cur, u32 *p_max);
+ int (*devlink_sb_occ_tc_port_bind_get)(struct dsa_switch *ds, int port,
+ unsigned int sb_index, u16 tc_index,
+ enum devlink_sb_pool_type pool_type,
+ u32 *p_cur, u32 *p_max);
+
+ /*
+ * 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);
+
+ /*
+ * LAG integration
+ */
+ int (*port_lag_change)(struct dsa_switch *ds, int port);
+ int (*port_lag_join)(struct dsa_switch *ds, int port,
+ struct dsa_lag lag,
+ struct netdev_lag_upper_info *info,
+ struct netlink_ext_ack *extack);
+ int (*port_lag_leave)(struct dsa_switch *ds, int port,
+ struct dsa_lag lag);
+
+ /*
+ * HSR integration
+ */
+ int (*port_hsr_join)(struct dsa_switch *ds, int port,
+ struct net_device *hsr);
+ int (*port_hsr_leave)(struct dsa_switch *ds, int port,
+ struct net_device *hsr);
+
+ /*
+ * MRP integration
+ */
+ int (*port_mrp_add)(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_mrp *mrp);
+ int (*port_mrp_del)(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_mrp *mrp);
+ int (*port_mrp_add_ring_role)(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_ring_role_mrp *mrp);
+ int (*port_mrp_del_ring_role)(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_ring_role_mrp *mrp);
+
+ /*
+ * tag_8021q operations
+ */
+ int (*tag_8021q_vlan_add)(struct dsa_switch *ds, int port, u16 vid,
+ u16 flags);
+ int (*tag_8021q_vlan_del)(struct dsa_switch *ds, int port, u16 vid);
+
+ /*
+ * DSA master tracking operations
+ */
+ void (*master_state_change)(struct dsa_switch *ds,
+ const struct net_device *master,
+ bool operational);
+};
+
+#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);
+
+bool dsa_fdb_present_in_other_db(struct dsa_switch *ds, int port,
+ const unsigned char *addr, u16 vid,
+ struct dsa_db db);
+bool dsa_mdb_present_in_other_db(struct dsa_switch *ds, int port,
+ const struct switchdev_obj_port_mdb *mdb,
+ struct dsa_db db);
+
+/* 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;
+}
+
+/* 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->needed_headroom;
+
+ *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_eth_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_eth_ioctl(dev, ifr, cmd);
+}
+#else
+static inline int dsa_ndo_eth_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);
+void dsa_switch_shutdown(struct dsa_switch *ds);
+struct dsa_switch *dsa_switch_find(int tree_index, int sw_index);
+void dsa_flush_workqueue(void);
+#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 */
+
+#if IS_ENABLED(CONFIG_NET_DSA)
+bool dsa_slave_dev_check(const struct net_device *dev);
+#else
+static inline bool dsa_slave_dev_check(const struct net_device *dev)
+{
+ return false;
+}
+#endif
+
+netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev);
+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 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_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
+