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/* 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 dsa_8021q_context;
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 conduit would drop packets on ingress
* if what it understands out of the destination MAC address is not in
* its RX filter.
*/
bool promisc_on_conduit;
};
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 conduit device. A user port
* exposes a network device to user-space, called 'user' here.
*/
union {
struct net_device *conduit;
struct net_device *user;
};
/* 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 conduit 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;
/* conduit state bits, valid only on CPU ports */
u8 conduit_admin_up:1;
u8 conduit_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 conduit netdev ethtool_ops
*/
const struct ethtool_ops *orig_ethtool_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;
struct mutex vlans_lock;
union {
/* List of VLANs that CPU and DSA ports are members of.
* Access to this is serialized by the sleepable @vlans_lock.
*/
struct list_head vlans;
/* List of VLANs that user ports are members of.
* Access to this is serialized by netif_addr_lock_bh().
*/
struct list_head user_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;
/*
* User mii_bus and devices for the individual ports.
*/
u32 phys_mii_mask;
struct mii_bus *user_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_conduit_is_operational(struct dsa_port *dp)
{
return dsa_port_is_cpu(dp) && dp->conduit_admin_up &&
dp->conduit_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_conduit(const struct dsa_port *dp)
{
if (dp->cpu_port_in_lag)
return dsa_port_lag_dev_get(dp->cpu_dp);
return dp->cpu_dp->conduit;
}
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->user;
}
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_conduit)(struct dsa_switch *ds, int port,
struct net_device *conduit,
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);
struct phylink_pcs *(*phylink_mac_select_pcs)(struct dsa_switch *ds,
int port,
phy_interface_t iface);
int (*phylink_mac_prepare)(struct dsa_switch *ds, int port,
unsigned int mode,
phy_interface_t interface);
void (*phylink_mac_config)(struct dsa_switch *ds, int port,
unsigned int mode,
const struct phylink_link_state *state);
int (*phylink_mac_finish)(struct dsa_switch *ds, int port,
unsigned int mode,
phy_interface_t interface);
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);
/*
* ethtool MAC merge layer
*/
int (*get_mm)(struct dsa_switch *ds, int port,
struct ethtool_mm_state *state);
int (*set_mm)(struct dsa_switch *ds, int port,
struct ethtool_mm_cfg *cfg,
struct netlink_ext_ack *extack);
void (*get_mm_stats)(struct dsa_switch *ds, int port,
struct ethtool_mm_stats *stats);
/*
* 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);
/*
* Notification for MAC address changes on user ports. Drivers can
* currently only veto operations. They should not use the method to
* program the hardware, since the operation is not rolled back in case
* of other errors.
*/
int (*port_set_mac_address)(struct dsa_switch *ds, int port,
const unsigned char *addr);
/*
* Compatibility between device trees defining multiple CPU ports and
* drivers which are not OK to use by default the numerically smallest
* CPU port of a switch for its local ports. This can return NULL,
* meaning "don't know/don't care".
*/
struct dsa_port *(*preferred_default_local_cpu_port)(struct dsa_switch *ds);
/*
* 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,
struct netlink_ext_ack *extack);
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 conduit tracking operations
*/
void (*conduit_state_change)(struct dsa_switch *ds,
const struct net_device *conduit,
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;
};
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
}
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_user_dev_check(const struct net_device *dev);
#else
static inline bool dsa_user_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);
#endif
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