1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
4 * Copyright (c) 2008-2009 Marvell Semiconductor
7 #ifndef __LINUX_NET_DSA_H
8 #define __LINUX_NET_DSA_H
11 #include <linux/if_ether.h>
12 #include <linux/list.h>
13 #include <linux/notifier.h>
14 #include <linux/timer.h>
15 #include <linux/workqueue.h>
17 #include <linux/ethtool.h>
18 #include <linux/net_tstamp.h>
19 #include <linux/phy.h>
20 #include <linux/platform_data/dsa.h>
21 #include <linux/phylink.h>
22 #include <net/devlink.h>
23 #include <net/switchdev.h>
25 struct dsa_8021q_context;
28 #define DSA_TAG_PROTO_NONE_VALUE 0
29 #define DSA_TAG_PROTO_BRCM_VALUE 1
30 #define DSA_TAG_PROTO_BRCM_PREPEND_VALUE 2
31 #define DSA_TAG_PROTO_DSA_VALUE 3
32 #define DSA_TAG_PROTO_EDSA_VALUE 4
33 #define DSA_TAG_PROTO_GSWIP_VALUE 5
34 #define DSA_TAG_PROTO_KSZ9477_VALUE 6
35 #define DSA_TAG_PROTO_KSZ9893_VALUE 7
36 #define DSA_TAG_PROTO_LAN9303_VALUE 8
37 #define DSA_TAG_PROTO_MTK_VALUE 9
38 #define DSA_TAG_PROTO_QCA_VALUE 10
39 #define DSA_TAG_PROTO_TRAILER_VALUE 11
40 #define DSA_TAG_PROTO_8021Q_VALUE 12
41 #define DSA_TAG_PROTO_SJA1105_VALUE 13
42 #define DSA_TAG_PROTO_KSZ8795_VALUE 14
43 #define DSA_TAG_PROTO_OCELOT_VALUE 15
44 #define DSA_TAG_PROTO_AR9331_VALUE 16
45 #define DSA_TAG_PROTO_RTL4_A_VALUE 17
46 #define DSA_TAG_PROTO_HELLCREEK_VALUE 18
47 #define DSA_TAG_PROTO_XRS700X_VALUE 19
48 #define DSA_TAG_PROTO_OCELOT_8021Q_VALUE 20
49 #define DSA_TAG_PROTO_SEVILLE_VALUE 21
50 #define DSA_TAG_PROTO_BRCM_LEGACY_VALUE 22
51 #define DSA_TAG_PROTO_SJA1110_VALUE 23
52 #define DSA_TAG_PROTO_RTL8_4_VALUE 24
53 #define DSA_TAG_PROTO_RTL8_4T_VALUE 25
54 #define DSA_TAG_PROTO_RZN1_A5PSW_VALUE 26
55 #define DSA_TAG_PROTO_LAN937X_VALUE 27
57 enum dsa_tag_protocol {
58 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE,
59 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE,
60 DSA_TAG_PROTO_BRCM_LEGACY = DSA_TAG_PROTO_BRCM_LEGACY_VALUE,
61 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE,
62 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE,
63 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE,
64 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE,
65 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE,
66 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE,
67 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE,
68 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE,
69 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE,
70 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE,
71 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE,
72 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE,
73 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE,
74 DSA_TAG_PROTO_OCELOT = DSA_TAG_PROTO_OCELOT_VALUE,
75 DSA_TAG_PROTO_AR9331 = DSA_TAG_PROTO_AR9331_VALUE,
76 DSA_TAG_PROTO_RTL4_A = DSA_TAG_PROTO_RTL4_A_VALUE,
77 DSA_TAG_PROTO_HELLCREEK = DSA_TAG_PROTO_HELLCREEK_VALUE,
78 DSA_TAG_PROTO_XRS700X = DSA_TAG_PROTO_XRS700X_VALUE,
79 DSA_TAG_PROTO_OCELOT_8021Q = DSA_TAG_PROTO_OCELOT_8021Q_VALUE,
80 DSA_TAG_PROTO_SEVILLE = DSA_TAG_PROTO_SEVILLE_VALUE,
81 DSA_TAG_PROTO_SJA1110 = DSA_TAG_PROTO_SJA1110_VALUE,
82 DSA_TAG_PROTO_RTL8_4 = DSA_TAG_PROTO_RTL8_4_VALUE,
83 DSA_TAG_PROTO_RTL8_4T = DSA_TAG_PROTO_RTL8_4T_VALUE,
84 DSA_TAG_PROTO_RZN1_A5PSW = DSA_TAG_PROTO_RZN1_A5PSW_VALUE,
85 DSA_TAG_PROTO_LAN937X = DSA_TAG_PROTO_LAN937X_VALUE,
90 struct dsa_device_ops {
91 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);
92 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev);
93 void (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
95 int (*connect)(struct dsa_switch *ds);
96 void (*disconnect)(struct dsa_switch *ds);
97 unsigned int needed_headroom;
98 unsigned int needed_tailroom;
100 enum dsa_tag_protocol proto;
101 /* Some tagging protocols either mangle or shift the destination MAC
102 * address, in which case the DSA conduit would drop packets on ingress
103 * if what it understands out of the destination MAC address is not in
106 bool promisc_on_conduit;
110 struct net_device *dev;
112 struct mutex fdb_lock;
113 struct list_head fdbs;
117 struct dsa_switch_tree {
118 struct list_head list;
120 /* List of switch ports */
121 struct list_head ports;
123 /* Notifier chain for switch-wide events */
124 struct raw_notifier_head nh;
126 /* Tree identifier */
129 /* Number of switches attached to this tree */
130 struct kref refcount;
132 /* Maps offloaded LAG netdevs to a zero-based linear ID for
133 * drivers that need it.
135 struct dsa_lag **lags;
137 /* Tagging protocol operations */
138 const struct dsa_device_ops *tag_ops;
140 /* Default tagging protocol preferred by the switches in this
143 enum dsa_tag_protocol default_proto;
145 /* Has this tree been applied to the hardware? */
149 * Configuration data for the platform device that owns
150 * this dsa switch tree instance.
152 struct dsa_platform_data *pd;
154 /* List of DSA links composing the routing table */
155 struct list_head rtable;
157 /* Length of "lags" array */
158 unsigned int lags_len;
160 /* Track the largest switch index within a tree */
161 unsigned int last_switch;
164 /* LAG IDs are one-based, the dst->lags array is zero-based */
165 #define dsa_lags_foreach_id(_id, _dst) \
166 for ((_id) = 1; (_id) <= (_dst)->lags_len; (_id)++) \
167 if ((_dst)->lags[(_id) - 1])
169 #define dsa_lag_foreach_port(_dp, _dst, _lag) \
170 list_for_each_entry((_dp), &(_dst)->ports, list) \
171 if (dsa_port_offloads_lag((_dp), (_lag)))
173 #define dsa_hsr_foreach_port(_dp, _ds, _hsr) \
174 list_for_each_entry((_dp), &(_ds)->dst->ports, list) \
175 if ((_dp)->ds == (_ds) && (_dp)->hsr_dev == (_hsr))
177 static inline struct dsa_lag *dsa_lag_by_id(struct dsa_switch_tree *dst,
180 /* DSA LAG IDs are one-based, dst->lags is zero-based */
181 return dst->lags[id - 1];
184 static inline int dsa_lag_id(struct dsa_switch_tree *dst,
185 struct net_device *lag_dev)
189 dsa_lags_foreach_id(id, dst) {
190 struct dsa_lag *lag = dsa_lag_by_id(dst, id);
192 if (lag->dev == lag_dev)
199 /* TC matchall action types */
200 enum dsa_port_mall_action_type {
201 DSA_PORT_MALL_MIRROR,
202 DSA_PORT_MALL_POLICER,
205 /* TC mirroring entry */
206 struct dsa_mall_mirror_tc_entry {
211 /* TC port policer entry */
212 struct dsa_mall_policer_tc_entry {
214 u64 rate_bytes_per_sec;
217 /* TC matchall entry */
218 struct dsa_mall_tc_entry {
219 struct list_head list;
220 unsigned long cookie;
221 enum dsa_port_mall_action_type type;
223 struct dsa_mall_mirror_tc_entry mirror;
224 struct dsa_mall_policer_tc_entry policer;
229 struct net_device *dev;
236 /* A CPU port is physically connected to a conduit device. A user port
237 * exposes a network device to user-space, called 'user' here.
240 struct net_device *conduit;
241 struct net_device *user;
244 /* Copy of the tagging protocol operations, for quicker access
245 * in the data path. Valid only for the CPU ports.
247 const struct dsa_device_ops *tag_ops;
249 /* Copies for faster access in conduit receive hot path */
250 struct dsa_switch_tree *dst;
251 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev);
253 struct dsa_switch *ds;
258 DSA_PORT_TYPE_UNUSED = 0,
265 struct dsa_port *cpu_dp;
270 /* Warning: the following bit fields are not atomic, and updating them
271 * can only be done from code paths where concurrency is not possible
272 * (probe time or under rtnl_lock).
276 /* Managed by DSA on user ports and by drivers on CPU and DSA ports */
281 /* conduit state bits, valid only on CPU ports */
282 u8 conduit_admin_up:1;
283 u8 conduit_oper_up:1;
285 /* Valid only on user ports */
286 u8 cpu_port_in_lag:1;
290 struct device_node *dn;
291 unsigned int ageing_time;
293 struct dsa_bridge *bridge;
294 struct devlink_port devlink_port;
296 struct phylink_config pl_config;
298 struct net_device *hsr_dev;
300 struct list_head list;
303 * Original copy of the conduit netdev ethtool_ops
305 const struct ethtool_ops *orig_ethtool_ops;
307 /* List of MAC addresses that must be forwarded on this port.
308 * These are only valid on CPU ports and DSA links.
310 struct mutex addr_lists_lock;
311 struct list_head fdbs;
312 struct list_head mdbs;
314 struct mutex vlans_lock;
316 /* List of VLANs that CPU and DSA ports are members of.
317 * Access to this is serialized by the sleepable @vlans_lock.
319 struct list_head vlans;
320 /* List of VLANs that user ports are members of.
321 * Access to this is serialized by netif_addr_lock_bh().
323 struct list_head user_vlans;
327 static inline struct dsa_port *
328 dsa_phylink_to_port(struct phylink_config *config)
330 return container_of(config, struct dsa_port, pl_config);
333 /* TODO: ideally DSA ports would have a single dp->link_dp member,
334 * and no dst->rtable nor this struct dsa_link would be needed,
335 * but this would require some more complex tree walking,
336 * so keep it stupid at the moment and list them all.
340 struct dsa_port *link_dp;
341 struct list_head list;
351 enum dsa_db_type type;
354 const struct dsa_port *dp;
356 struct dsa_bridge bridge;
360 struct dsa_mac_addr {
361 unsigned char addr[ETH_ALEN];
364 struct list_head list;
371 struct list_head list;
378 * Parent switch tree, and switch index.
380 struct dsa_switch_tree *dst;
383 /* Warning: the following bit fields are not atomic, and updating them
384 * can only be done from code paths where concurrency is not possible
385 * (probe time or under rtnl_lock).
389 /* Disallow bridge core from requesting different VLAN awareness
390 * settings on ports if not hardware-supported
392 u32 vlan_filtering_is_global:1;
394 /* Keep VLAN filtering enabled on ports not offloading any upper */
395 u32 needs_standalone_vlan_filtering:1;
397 /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges
398 * that have vlan_filtering=0. All drivers should ideally set this (and
399 * then the option would get removed), but it is unknown whether this
400 * would break things or not.
402 u32 configure_vlan_while_not_filtering:1;
404 /* If the switch driver always programs the CPU port as egress tagged
405 * despite the VLAN configuration indicating otherwise, then setting
406 * @untag_bridge_pvid will force the DSA receive path to pop the
407 * bridge's default_pvid VLAN tagged frames to offer a consistent
408 * behavior between a vlan_filtering=0 and vlan_filtering=1 bridge
411 u32 untag_bridge_pvid:1;
413 /* Let DSA manage the FDB entries towards the
414 * CPU, based on the software bridge database.
416 u32 assisted_learning_on_cpu_port:1;
418 /* In case vlan_filtering_is_global is set, the VLAN awareness state
419 * should be retrieved from here and not from the per-port settings.
421 u32 vlan_filtering:1;
423 /* For switches that only have the MRU configurable. To ensure the
424 * configured MTU is not exceeded, normalization of MRU on all bridged
425 * interfaces is needed.
427 u32 mtu_enforcement_ingress:1;
429 /* Drivers that isolate the FDBs of multiple bridges must set this
430 * to true to receive the bridge as an argument in .port_fdb_{add,del}
431 * and .port_mdb_{add,del}. Otherwise, the bridge.num will always be
436 /* Drivers that have global DSCP mapping settings must set this to
437 * true to automatically apply the settings to all ports.
439 u32 dscp_prio_mapping_is_global:1;
441 /* Listener for switch fabric events */
442 struct notifier_block nb;
445 * Give the switch driver somewhere to hang its private data
453 * Configuration data for this switch.
455 struct dsa_chip_data *cd;
458 * The switch operations.
460 const struct dsa_switch_ops *ops;
463 * Allow a DSA switch driver to override the phylink MAC ops
465 const struct phylink_mac_ops *phylink_mac_ops;
468 * User mii_bus and devices for the individual ports.
471 struct mii_bus *user_mii_bus;
473 /* Ageing Time limits in msecs */
474 unsigned int ageing_time_min;
475 unsigned int ageing_time_max;
477 /* Storage for drivers using tag_8021q */
478 struct dsa_8021q_context *tag_8021q_ctx;
480 /* devlink used to represent this switch device */
481 struct devlink *devlink;
483 /* Number of switch port queues */
484 unsigned int num_tx_queues;
486 /* Drivers that benefit from having an ID associated with each
487 * offloaded LAG should set this to the maximum number of
488 * supported IDs. DSA will then maintain a mapping of _at
489 * least_ these many IDs, accessible to drivers via
492 unsigned int num_lag_ids;
494 /* Drivers that support bridge forwarding offload or FDB isolation
495 * should set this to the maximum number of bridges spanning the same
496 * switch tree (or all trees, in the case of cross-tree bridging
497 * support) that can be offloaded.
499 unsigned int max_num_bridges;
501 unsigned int num_ports;
504 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
506 struct dsa_switch_tree *dst = ds->dst;
509 list_for_each_entry(dp, &dst->ports, list)
510 if (dp->ds == ds && dp->index == p)
516 static inline bool dsa_port_is_dsa(struct dsa_port *port)
518 return port->type == DSA_PORT_TYPE_DSA;
521 static inline bool dsa_port_is_cpu(struct dsa_port *port)
523 return port->type == DSA_PORT_TYPE_CPU;
526 static inline bool dsa_port_is_user(struct dsa_port *dp)
528 return dp->type == DSA_PORT_TYPE_USER;
531 static inline bool dsa_port_is_unused(struct dsa_port *dp)
533 return dp->type == DSA_PORT_TYPE_UNUSED;
536 static inline bool dsa_port_conduit_is_operational(struct dsa_port *dp)
538 return dsa_port_is_cpu(dp) && dp->conduit_admin_up &&
542 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p)
544 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;
547 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
549 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU;
552 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
554 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA;
557 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p)
559 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER;
562 #define dsa_tree_for_each_user_port(_dp, _dst) \
563 list_for_each_entry((_dp), &(_dst)->ports, list) \
564 if (dsa_port_is_user((_dp)))
566 #define dsa_tree_for_each_user_port_continue_reverse(_dp, _dst) \
567 list_for_each_entry_continue_reverse((_dp), &(_dst)->ports, list) \
568 if (dsa_port_is_user((_dp)))
570 #define dsa_tree_for_each_cpu_port(_dp, _dst) \
571 list_for_each_entry((_dp), &(_dst)->ports, list) \
572 if (dsa_port_is_cpu((_dp)))
574 #define dsa_switch_for_each_port(_dp, _ds) \
575 list_for_each_entry((_dp), &(_ds)->dst->ports, list) \
576 if ((_dp)->ds == (_ds))
578 #define dsa_switch_for_each_port_safe(_dp, _next, _ds) \
579 list_for_each_entry_safe((_dp), (_next), &(_ds)->dst->ports, list) \
580 if ((_dp)->ds == (_ds))
582 #define dsa_switch_for_each_port_continue_reverse(_dp, _ds) \
583 list_for_each_entry_continue_reverse((_dp), &(_ds)->dst->ports, list) \
584 if ((_dp)->ds == (_ds))
586 #define dsa_switch_for_each_available_port(_dp, _ds) \
587 dsa_switch_for_each_port((_dp), (_ds)) \
588 if (!dsa_port_is_unused((_dp)))
590 #define dsa_switch_for_each_user_port(_dp, _ds) \
591 dsa_switch_for_each_port((_dp), (_ds)) \
592 if (dsa_port_is_user((_dp)))
594 #define dsa_switch_for_each_user_port_continue_reverse(_dp, _ds) \
595 dsa_switch_for_each_port_continue_reverse((_dp), (_ds)) \
596 if (dsa_port_is_user((_dp)))
598 #define dsa_switch_for_each_cpu_port(_dp, _ds) \
599 dsa_switch_for_each_port((_dp), (_ds)) \
600 if (dsa_port_is_cpu((_dp)))
602 #define dsa_switch_for_each_cpu_port_continue_reverse(_dp, _ds) \
603 dsa_switch_for_each_port_continue_reverse((_dp), (_ds)) \
604 if (dsa_port_is_cpu((_dp)))
606 static inline u32 dsa_user_ports(struct dsa_switch *ds)
611 dsa_switch_for_each_user_port(dp, ds)
612 mask |= BIT(dp->index);
617 static inline u32 dsa_cpu_ports(struct dsa_switch *ds)
619 struct dsa_port *cpu_dp;
622 dsa_switch_for_each_cpu_port(cpu_dp, ds)
623 mask |= BIT(cpu_dp->index);
628 /* Return the local port used to reach an arbitrary switch device */
629 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device)
631 struct dsa_switch_tree *dst = ds->dst;
634 list_for_each_entry(dl, &dst->rtable, list)
635 if (dl->dp->ds == ds && dl->link_dp->ds->index == device)
636 return dl->dp->index;
638 return ds->num_ports;
641 /* Return the local port used to reach an arbitrary switch port */
642 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device,
645 if (device == ds->index)
648 return dsa_routing_port(ds, device);
651 /* Return the local port used to reach the dedicated CPU port */
652 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port)
654 const struct dsa_port *dp = dsa_to_port(ds, port);
655 const struct dsa_port *cpu_dp = dp->cpu_dp;
660 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index);
663 /* Return true if this is the local port used to reach the CPU port */
664 static inline bool dsa_is_upstream_port(struct dsa_switch *ds, int port)
666 if (dsa_is_unused_port(ds, port))
669 return port == dsa_upstream_port(ds, port);
672 /* Return true if this is a DSA port leading away from the CPU */
673 static inline bool dsa_is_downstream_port(struct dsa_switch *ds, int port)
675 return dsa_is_dsa_port(ds, port) && !dsa_is_upstream_port(ds, port);
678 /* Return the local port used to reach the CPU port */
679 static inline unsigned int dsa_switch_upstream_port(struct dsa_switch *ds)
683 dsa_switch_for_each_available_port(dp, ds) {
684 return dsa_upstream_port(ds, dp->index);
687 return ds->num_ports;
690 /* Return true if @upstream_ds is an upstream switch of @downstream_ds, meaning
691 * that the routing port from @downstream_ds to @upstream_ds is also the port
692 * which @downstream_ds uses to reach its dedicated CPU.
694 static inline bool dsa_switch_is_upstream_of(struct dsa_switch *upstream_ds,
695 struct dsa_switch *downstream_ds)
699 if (upstream_ds == downstream_ds)
702 routing_port = dsa_routing_port(downstream_ds, upstream_ds->index);
704 return dsa_is_upstream_port(downstream_ds, routing_port);
707 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp)
709 const struct dsa_switch *ds = dp->ds;
711 if (ds->vlan_filtering_is_global)
712 return ds->vlan_filtering;
714 return dp->vlan_filtering;
717 static inline unsigned int dsa_port_lag_id_get(struct dsa_port *dp)
719 return dp->lag ? dp->lag->id : 0;
722 static inline struct net_device *dsa_port_lag_dev_get(struct dsa_port *dp)
724 return dp->lag ? dp->lag->dev : NULL;
727 static inline bool dsa_port_offloads_lag(struct dsa_port *dp,
728 const struct dsa_lag *lag)
730 return dsa_port_lag_dev_get(dp) == lag->dev;
733 static inline struct net_device *dsa_port_to_conduit(const struct dsa_port *dp)
735 if (dp->cpu_port_in_lag)
736 return dsa_port_lag_dev_get(dp->cpu_dp);
738 return dp->cpu_dp->conduit;
742 struct net_device *dsa_port_to_bridge_port(const struct dsa_port *dp)
749 else if (dp->hsr_dev)
755 static inline struct net_device *
756 dsa_port_bridge_dev_get(const struct dsa_port *dp)
758 return dp->bridge ? dp->bridge->dev : NULL;
761 static inline unsigned int dsa_port_bridge_num_get(struct dsa_port *dp)
763 return dp->bridge ? dp->bridge->num : 0;
766 static inline bool dsa_port_bridge_same(const struct dsa_port *a,
767 const struct dsa_port *b)
769 struct net_device *br_a = dsa_port_bridge_dev_get(a);
770 struct net_device *br_b = dsa_port_bridge_dev_get(b);
772 /* Standalone ports are not in the same bridge with one another */
773 return (!br_a || !br_b) ? false : (br_a == br_b);
776 static inline bool dsa_port_offloads_bridge_port(struct dsa_port *dp,
777 const struct net_device *dev)
779 return dsa_port_to_bridge_port(dp) == dev;
783 dsa_port_offloads_bridge_dev(struct dsa_port *dp,
784 const struct net_device *bridge_dev)
786 /* DSA ports connected to a bridge, and event was emitted
789 return dsa_port_bridge_dev_get(dp) == bridge_dev;
792 static inline bool dsa_port_offloads_bridge(struct dsa_port *dp,
793 const struct dsa_bridge *bridge)
795 return dsa_port_bridge_dev_get(dp) == bridge->dev;
798 /* Returns true if any port of this tree offloads the given net_device */
799 static inline bool dsa_tree_offloads_bridge_port(struct dsa_switch_tree *dst,
800 const struct net_device *dev)
804 list_for_each_entry(dp, &dst->ports, list)
805 if (dsa_port_offloads_bridge_port(dp, dev))
811 /* Returns true if any port of this tree offloads the given bridge */
813 dsa_tree_offloads_bridge_dev(struct dsa_switch_tree *dst,
814 const struct net_device *bridge_dev)
818 list_for_each_entry(dp, &dst->ports, list)
819 if (dsa_port_offloads_bridge_dev(dp, bridge_dev))
825 static inline bool dsa_port_tree_same(const struct dsa_port *a,
826 const struct dsa_port *b)
828 return a->ds->dst == b->ds->dst;
831 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
832 bool is_static, void *data);
833 struct dsa_switch_ops {
835 * Tagging protocol helpers called for the CPU ports and DSA links.
836 * @get_tag_protocol retrieves the initial tagging protocol and is
837 * mandatory. Switches which can operate using multiple tagging
838 * protocols should implement @change_tag_protocol and report in
839 * @get_tag_protocol the tagger in current use.
841 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
843 enum dsa_tag_protocol mprot);
844 int (*change_tag_protocol)(struct dsa_switch *ds,
845 enum dsa_tag_protocol proto);
847 * Method for switch drivers to connect to the tagging protocol driver
848 * in current use. The switch driver can provide handlers for certain
849 * types of packets for switch management.
851 int (*connect_tag_protocol)(struct dsa_switch *ds,
852 enum dsa_tag_protocol proto);
854 int (*port_change_conduit)(struct dsa_switch *ds, int port,
855 struct net_device *conduit,
856 struct netlink_ext_ack *extack);
858 /* Optional switch-wide initialization and destruction methods */
859 int (*setup)(struct dsa_switch *ds);
860 void (*teardown)(struct dsa_switch *ds);
862 /* Per-port initialization and destruction methods. Mandatory if the
863 * driver registers devlink port regions, optional otherwise.
865 int (*port_setup)(struct dsa_switch *ds, int port);
866 void (*port_teardown)(struct dsa_switch *ds, int port);
868 u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
871 * Access to the switch's PHY registers.
873 int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
874 int (*phy_write)(struct dsa_switch *ds, int port,
875 int regnum, u16 val);
878 * PHYLINK integration
880 void (*phylink_get_caps)(struct dsa_switch *ds, int port,
881 struct phylink_config *config);
882 struct phylink_pcs *(*phylink_mac_select_pcs)(struct dsa_switch *ds,
884 phy_interface_t iface);
885 int (*phylink_mac_prepare)(struct dsa_switch *ds, int port,
887 phy_interface_t interface);
888 void (*phylink_mac_config)(struct dsa_switch *ds, int port,
890 const struct phylink_link_state *state);
891 int (*phylink_mac_finish)(struct dsa_switch *ds, int port,
893 phy_interface_t interface);
894 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port,
896 phy_interface_t interface);
897 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port,
899 phy_interface_t interface,
900 struct phy_device *phydev,
901 int speed, int duplex,
902 bool tx_pause, bool rx_pause);
903 void (*phylink_fixed_state)(struct dsa_switch *ds, int port,
904 struct phylink_link_state *state);
906 * Port statistics counters.
908 void (*get_strings)(struct dsa_switch *ds, int port,
909 u32 stringset, uint8_t *data);
910 void (*get_ethtool_stats)(struct dsa_switch *ds,
911 int port, uint64_t *data);
912 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset);
913 void (*get_ethtool_phy_stats)(struct dsa_switch *ds,
914 int port, uint64_t *data);
915 void (*get_eth_phy_stats)(struct dsa_switch *ds, int port,
916 struct ethtool_eth_phy_stats *phy_stats);
917 void (*get_eth_mac_stats)(struct dsa_switch *ds, int port,
918 struct ethtool_eth_mac_stats *mac_stats);
919 void (*get_eth_ctrl_stats)(struct dsa_switch *ds, int port,
920 struct ethtool_eth_ctrl_stats *ctrl_stats);
921 void (*get_rmon_stats)(struct dsa_switch *ds, int port,
922 struct ethtool_rmon_stats *rmon_stats,
923 const struct ethtool_rmon_hist_range **ranges);
924 void (*get_stats64)(struct dsa_switch *ds, int port,
925 struct rtnl_link_stats64 *s);
926 void (*get_pause_stats)(struct dsa_switch *ds, int port,
927 struct ethtool_pause_stats *pause_stats);
928 void (*self_test)(struct dsa_switch *ds, int port,
929 struct ethtool_test *etest, u64 *data);
932 * ethtool Wake-on-LAN
934 void (*get_wol)(struct dsa_switch *ds, int port,
935 struct ethtool_wolinfo *w);
936 int (*set_wol)(struct dsa_switch *ds, int port,
937 struct ethtool_wolinfo *w);
940 * ethtool timestamp info
942 int (*get_ts_info)(struct dsa_switch *ds, int port,
943 struct ethtool_ts_info *ts);
946 * ethtool MAC merge layer
948 int (*get_mm)(struct dsa_switch *ds, int port,
949 struct ethtool_mm_state *state);
950 int (*set_mm)(struct dsa_switch *ds, int port,
951 struct ethtool_mm_cfg *cfg,
952 struct netlink_ext_ack *extack);
953 void (*get_mm_stats)(struct dsa_switch *ds, int port,
954 struct ethtool_mm_stats *stats);
959 int (*port_get_default_prio)(struct dsa_switch *ds, int port);
960 int (*port_set_default_prio)(struct dsa_switch *ds, int port,
962 int (*port_get_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp);
963 int (*port_add_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp,
965 int (*port_del_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp,
967 int (*port_set_apptrust)(struct dsa_switch *ds, int port,
968 const u8 *sel, int nsel);
969 int (*port_get_apptrust)(struct dsa_switch *ds, int port, u8 *sel,
975 int (*suspend)(struct dsa_switch *ds);
976 int (*resume)(struct dsa_switch *ds);
979 * Port enable/disable
981 int (*port_enable)(struct dsa_switch *ds, int port,
982 struct phy_device *phy);
983 void (*port_disable)(struct dsa_switch *ds, int port);
987 * Notification for MAC address changes on user ports. Drivers can
988 * currently only veto operations. They should not use the method to
989 * program the hardware, since the operation is not rolled back in case
992 int (*port_set_mac_address)(struct dsa_switch *ds, int port,
993 const unsigned char *addr);
996 * Compatibility between device trees defining multiple CPU ports and
997 * drivers which are not OK to use by default the numerically smallest
998 * CPU port of a switch for its local ports. This can return NULL,
999 * meaning "don't know/don't care".
1001 struct dsa_port *(*preferred_default_local_cpu_port)(struct dsa_switch *ds);
1004 * Port's MAC EEE settings
1006 int (*set_mac_eee)(struct dsa_switch *ds, int port,
1007 struct ethtool_keee *e);
1008 int (*get_mac_eee)(struct dsa_switch *ds, int port,
1009 struct ethtool_keee *e);
1012 int (*get_eeprom_len)(struct dsa_switch *ds);
1013 int (*get_eeprom)(struct dsa_switch *ds,
1014 struct ethtool_eeprom *eeprom, u8 *data);
1015 int (*set_eeprom)(struct dsa_switch *ds,
1016 struct ethtool_eeprom *eeprom, u8 *data);
1021 int (*get_regs_len)(struct dsa_switch *ds, int port);
1022 void (*get_regs)(struct dsa_switch *ds, int port,
1023 struct ethtool_regs *regs, void *p);
1026 * Upper device tracking.
1028 int (*port_prechangeupper)(struct dsa_switch *ds, int port,
1029 struct netdev_notifier_changeupper_info *info);
1032 * Bridge integration
1034 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
1035 int (*port_bridge_join)(struct dsa_switch *ds, int port,
1036 struct dsa_bridge bridge,
1037 bool *tx_fwd_offload,
1038 struct netlink_ext_ack *extack);
1039 void (*port_bridge_leave)(struct dsa_switch *ds, int port,
1040 struct dsa_bridge bridge);
1041 void (*port_stp_state_set)(struct dsa_switch *ds, int port,
1043 int (*port_mst_state_set)(struct dsa_switch *ds, int port,
1044 const struct switchdev_mst_state *state);
1045 void (*port_fast_age)(struct dsa_switch *ds, int port);
1046 int (*port_vlan_fast_age)(struct dsa_switch *ds, int port, u16 vid);
1047 int (*port_pre_bridge_flags)(struct dsa_switch *ds, int port,
1048 struct switchdev_brport_flags flags,
1049 struct netlink_ext_ack *extack);
1050 int (*port_bridge_flags)(struct dsa_switch *ds, int port,
1051 struct switchdev_brport_flags flags,
1052 struct netlink_ext_ack *extack);
1053 void (*port_set_host_flood)(struct dsa_switch *ds, int port,
1059 int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
1060 bool vlan_filtering,
1061 struct netlink_ext_ack *extack);
1062 int (*port_vlan_add)(struct dsa_switch *ds, int port,
1063 const struct switchdev_obj_port_vlan *vlan,
1064 struct netlink_ext_ack *extack);
1065 int (*port_vlan_del)(struct dsa_switch *ds, int port,
1066 const struct switchdev_obj_port_vlan *vlan);
1067 int (*vlan_msti_set)(struct dsa_switch *ds, struct dsa_bridge bridge,
1068 const struct switchdev_vlan_msti *msti);
1071 * Forwarding database
1073 int (*port_fdb_add)(struct dsa_switch *ds, int port,
1074 const unsigned char *addr, u16 vid,
1076 int (*port_fdb_del)(struct dsa_switch *ds, int port,
1077 const unsigned char *addr, u16 vid,
1079 int (*port_fdb_dump)(struct dsa_switch *ds, int port,
1080 dsa_fdb_dump_cb_t *cb, void *data);
1081 int (*lag_fdb_add)(struct dsa_switch *ds, struct dsa_lag lag,
1082 const unsigned char *addr, u16 vid,
1084 int (*lag_fdb_del)(struct dsa_switch *ds, struct dsa_lag lag,
1085 const unsigned char *addr, u16 vid,
1089 * Multicast database
1091 int (*port_mdb_add)(struct dsa_switch *ds, int port,
1092 const struct switchdev_obj_port_mdb *mdb,
1094 int (*port_mdb_del)(struct dsa_switch *ds, int port,
1095 const struct switchdev_obj_port_mdb *mdb,
1100 int (*get_rxnfc)(struct dsa_switch *ds, int port,
1101 struct ethtool_rxnfc *nfc, u32 *rule_locs);
1102 int (*set_rxnfc)(struct dsa_switch *ds, int port,
1103 struct ethtool_rxnfc *nfc);
1108 int (*cls_flower_add)(struct dsa_switch *ds, int port,
1109 struct flow_cls_offload *cls, bool ingress);
1110 int (*cls_flower_del)(struct dsa_switch *ds, int port,
1111 struct flow_cls_offload *cls, bool ingress);
1112 int (*cls_flower_stats)(struct dsa_switch *ds, int port,
1113 struct flow_cls_offload *cls, bool ingress);
1114 int (*port_mirror_add)(struct dsa_switch *ds, int port,
1115 struct dsa_mall_mirror_tc_entry *mirror,
1116 bool ingress, struct netlink_ext_ack *extack);
1117 void (*port_mirror_del)(struct dsa_switch *ds, int port,
1118 struct dsa_mall_mirror_tc_entry *mirror);
1119 int (*port_policer_add)(struct dsa_switch *ds, int port,
1120 struct dsa_mall_policer_tc_entry *policer);
1121 void (*port_policer_del)(struct dsa_switch *ds, int port);
1122 int (*port_setup_tc)(struct dsa_switch *ds, int port,
1123 enum tc_setup_type type, void *type_data);
1126 * Cross-chip operations
1128 int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index,
1129 int sw_index, int port,
1130 struct dsa_bridge bridge,
1131 struct netlink_ext_ack *extack);
1132 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index,
1133 int sw_index, int port,
1134 struct dsa_bridge bridge);
1135 int (*crosschip_lag_change)(struct dsa_switch *ds, int sw_index,
1137 int (*crosschip_lag_join)(struct dsa_switch *ds, int sw_index,
1138 int port, struct dsa_lag lag,
1139 struct netdev_lag_upper_info *info,
1140 struct netlink_ext_ack *extack);
1141 int (*crosschip_lag_leave)(struct dsa_switch *ds, int sw_index,
1142 int port, struct dsa_lag lag);
1147 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port,
1149 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port,
1151 void (*port_txtstamp)(struct dsa_switch *ds, int port,
1152 struct sk_buff *skb);
1153 bool (*port_rxtstamp)(struct dsa_switch *ds, int port,
1154 struct sk_buff *skb, unsigned int type);
1156 /* Devlink parameters, etc */
1157 int (*devlink_param_get)(struct dsa_switch *ds, u32 id,
1158 struct devlink_param_gset_ctx *ctx);
1159 int (*devlink_param_set)(struct dsa_switch *ds, u32 id,
1160 struct devlink_param_gset_ctx *ctx);
1161 int (*devlink_info_get)(struct dsa_switch *ds,
1162 struct devlink_info_req *req,
1163 struct netlink_ext_ack *extack);
1164 int (*devlink_sb_pool_get)(struct dsa_switch *ds,
1165 unsigned int sb_index, u16 pool_index,
1166 struct devlink_sb_pool_info *pool_info);
1167 int (*devlink_sb_pool_set)(struct dsa_switch *ds, unsigned int sb_index,
1168 u16 pool_index, u32 size,
1169 enum devlink_sb_threshold_type threshold_type,
1170 struct netlink_ext_ack *extack);
1171 int (*devlink_sb_port_pool_get)(struct dsa_switch *ds, int port,
1172 unsigned int sb_index, u16 pool_index,
1174 int (*devlink_sb_port_pool_set)(struct dsa_switch *ds, int port,
1175 unsigned int sb_index, u16 pool_index,
1177 struct netlink_ext_ack *extack);
1178 int (*devlink_sb_tc_pool_bind_get)(struct dsa_switch *ds, int port,
1179 unsigned int sb_index, u16 tc_index,
1180 enum devlink_sb_pool_type pool_type,
1181 u16 *p_pool_index, u32 *p_threshold);
1182 int (*devlink_sb_tc_pool_bind_set)(struct dsa_switch *ds, int port,
1183 unsigned int sb_index, u16 tc_index,
1184 enum devlink_sb_pool_type pool_type,
1185 u16 pool_index, u32 threshold,
1186 struct netlink_ext_ack *extack);
1187 int (*devlink_sb_occ_snapshot)(struct dsa_switch *ds,
1188 unsigned int sb_index);
1189 int (*devlink_sb_occ_max_clear)(struct dsa_switch *ds,
1190 unsigned int sb_index);
1191 int (*devlink_sb_occ_port_pool_get)(struct dsa_switch *ds, int port,
1192 unsigned int sb_index, u16 pool_index,
1193 u32 *p_cur, u32 *p_max);
1194 int (*devlink_sb_occ_tc_port_bind_get)(struct dsa_switch *ds, int port,
1195 unsigned int sb_index, u16 tc_index,
1196 enum devlink_sb_pool_type pool_type,
1197 u32 *p_cur, u32 *p_max);
1200 * MTU change functionality. Switches can also adjust their MRU through
1201 * this method. By MTU, one understands the SDU (L2 payload) length.
1202 * If the switch needs to account for the DSA tag on the CPU port, this
1203 * method needs to do so privately.
1205 int (*port_change_mtu)(struct dsa_switch *ds, int port,
1207 int (*port_max_mtu)(struct dsa_switch *ds, int port);
1212 int (*port_lag_change)(struct dsa_switch *ds, int port);
1213 int (*port_lag_join)(struct dsa_switch *ds, int port,
1215 struct netdev_lag_upper_info *info,
1216 struct netlink_ext_ack *extack);
1217 int (*port_lag_leave)(struct dsa_switch *ds, int port,
1218 struct dsa_lag lag);
1223 int (*port_hsr_join)(struct dsa_switch *ds, int port,
1224 struct net_device *hsr,
1225 struct netlink_ext_ack *extack);
1226 int (*port_hsr_leave)(struct dsa_switch *ds, int port,
1227 struct net_device *hsr);
1232 int (*port_mrp_add)(struct dsa_switch *ds, int port,
1233 const struct switchdev_obj_mrp *mrp);
1234 int (*port_mrp_del)(struct dsa_switch *ds, int port,
1235 const struct switchdev_obj_mrp *mrp);
1236 int (*port_mrp_add_ring_role)(struct dsa_switch *ds, int port,
1237 const struct switchdev_obj_ring_role_mrp *mrp);
1238 int (*port_mrp_del_ring_role)(struct dsa_switch *ds, int port,
1239 const struct switchdev_obj_ring_role_mrp *mrp);
1242 * tag_8021q operations
1244 int (*tag_8021q_vlan_add)(struct dsa_switch *ds, int port, u16 vid,
1246 int (*tag_8021q_vlan_del)(struct dsa_switch *ds, int port, u16 vid);
1249 * DSA conduit tracking operations
1251 void (*conduit_state_change)(struct dsa_switch *ds,
1252 const struct net_device *conduit,
1256 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \
1257 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \
1258 dsa_devlink_param_get, dsa_devlink_param_set, NULL)
1260 int dsa_devlink_param_get(struct devlink *dl, u32 id,
1261 struct devlink_param_gset_ctx *ctx);
1262 int dsa_devlink_param_set(struct devlink *dl, u32 id,
1263 struct devlink_param_gset_ctx *ctx,
1264 struct netlink_ext_ack *extack);
1265 int dsa_devlink_params_register(struct dsa_switch *ds,
1266 const struct devlink_param *params,
1267 size_t params_count);
1268 void dsa_devlink_params_unregister(struct dsa_switch *ds,
1269 const struct devlink_param *params,
1270 size_t params_count);
1271 int dsa_devlink_resource_register(struct dsa_switch *ds,
1272 const char *resource_name,
1275 u64 parent_resource_id,
1276 const struct devlink_resource_size_params *size_params);
1278 void dsa_devlink_resources_unregister(struct dsa_switch *ds);
1280 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds,
1282 devlink_resource_occ_get_t *occ_get,
1283 void *occ_get_priv);
1284 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds,
1286 struct devlink_region *
1287 dsa_devlink_region_create(struct dsa_switch *ds,
1288 const struct devlink_region_ops *ops,
1289 u32 region_max_snapshots, u64 region_size);
1290 struct devlink_region *
1291 dsa_devlink_port_region_create(struct dsa_switch *ds,
1293 const struct devlink_port_region_ops *ops,
1294 u32 region_max_snapshots, u64 region_size);
1295 void dsa_devlink_region_destroy(struct devlink_region *region);
1297 struct dsa_port *dsa_port_from_netdev(struct net_device *netdev);
1299 struct dsa_devlink_priv {
1300 struct dsa_switch *ds;
1303 static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl)
1305 struct dsa_devlink_priv *dl_priv = devlink_priv(dl);
1311 struct dsa_switch *dsa_devlink_port_to_ds(struct devlink_port *port)
1313 struct devlink *dl = port->devlink;
1314 struct dsa_devlink_priv *dl_priv = devlink_priv(dl);
1319 static inline int dsa_devlink_port_to_port(struct devlink_port *port)
1324 struct dsa_switch_driver {
1325 struct list_head list;
1326 const struct dsa_switch_ops *ops;
1329 bool dsa_fdb_present_in_other_db(struct dsa_switch *ds, int port,
1330 const unsigned char *addr, u16 vid,
1332 bool dsa_mdb_present_in_other_db(struct dsa_switch *ds, int port,
1333 const struct switchdev_obj_port_mdb *mdb,
1336 /* Keep inline for faster access in hot path */
1337 static inline bool netdev_uses_dsa(const struct net_device *dev)
1339 #if IS_ENABLED(CONFIG_NET_DSA)
1340 return dev->dsa_ptr && dev->dsa_ptr->rcv;
1345 /* All DSA tags that push the EtherType to the right (basically all except tail
1346 * tags, which don't break dissection) can be treated the same from the
1347 * perspective of the flow dissector.
1349 * We need to return:
1350 * - offset: the (B - A) difference between:
1351 * A. the position of the real EtherType and
1352 * B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes
1353 * after the normal EtherType was supposed to be)
1354 * The offset in bytes is exactly equal to the tagger overhead (and half of
1355 * that, in __be16 shorts).
1357 * - proto: the value of the real EtherType.
1359 static inline void dsa_tag_generic_flow_dissect(const struct sk_buff *skb,
1360 __be16 *proto, int *offset)
1362 #if IS_ENABLED(CONFIG_NET_DSA)
1363 const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops;
1364 int tag_len = ops->needed_headroom;
1367 *proto = ((__be16 *)skb->data)[(tag_len / 2) - 1];
1371 void dsa_unregister_switch(struct dsa_switch *ds);
1372 int dsa_register_switch(struct dsa_switch *ds);
1373 void dsa_switch_shutdown(struct dsa_switch *ds);
1374 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index);
1375 void dsa_flush_workqueue(void);
1376 #ifdef CONFIG_PM_SLEEP
1377 int dsa_switch_suspend(struct dsa_switch *ds);
1378 int dsa_switch_resume(struct dsa_switch *ds);
1380 static inline int dsa_switch_suspend(struct dsa_switch *ds)
1384 static inline int dsa_switch_resume(struct dsa_switch *ds)
1388 #endif /* CONFIG_PM_SLEEP */
1390 #if IS_ENABLED(CONFIG_NET_DSA)
1391 bool dsa_user_dev_check(const struct net_device *dev);
1393 static inline bool dsa_user_dev_check(const struct net_device *dev)
1399 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev);
1400 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up);