include/net/dsa.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
   4  * Copyright (c) 2008-2009 Marvell Semiconductor
   5  */
   6
   7 #ifndef __LINUX_NET_DSA_H
   8 #define __LINUX_NET_DSA_H
   9
  10 #include <linux/if.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>
  16 #include <linux/of.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>
  24
  25 struct tc_action;
  26 struct phy_device;
  27 struct fixed_phy_status;
  28 struct phylink_link_state;
  29
  30 #define DSA_TAG_PROTO_NONE_VALUE                0
  31 #define DSA_TAG_PROTO_BRCM_VALUE                1
  32 #define DSA_TAG_PROTO_BRCM_PREPEND_VALUE        2
  33 #define DSA_TAG_PROTO_DSA_VALUE                 3
  34 #define DSA_TAG_PROTO_EDSA_VALUE                4
  35 #define DSA_TAG_PROTO_GSWIP_VALUE               5
  36 #define DSA_TAG_PROTO_KSZ9477_VALUE             6
  37 #define DSA_TAG_PROTO_KSZ9893_VALUE             7
  38 #define DSA_TAG_PROTO_LAN9303_VALUE             8
  39 #define DSA_TAG_PROTO_MTK_VALUE                 9
  40 #define DSA_TAG_PROTO_QCA_VALUE                 10
  41 #define DSA_TAG_PROTO_TRAILER_VALUE             11
  42 #define DSA_TAG_PROTO_8021Q_VALUE               12
  43 #define DSA_TAG_PROTO_SJA1105_VALUE             13
  44 #define DSA_TAG_PROTO_KSZ8795_VALUE             14
  45 #define DSA_TAG_PROTO_OCELOT_VALUE              15
  46 #define DSA_TAG_PROTO_AR9331_VALUE              16
  47
  48 enum dsa_tag_protocol {
  49         DSA_TAG_PROTO_NONE              = DSA_TAG_PROTO_NONE_VALUE,
  50         DSA_TAG_PROTO_BRCM              = DSA_TAG_PROTO_BRCM_VALUE,
  51         DSA_TAG_PROTO_BRCM_PREPEND      = DSA_TAG_PROTO_BRCM_PREPEND_VALUE,
  52         DSA_TAG_PROTO_DSA               = DSA_TAG_PROTO_DSA_VALUE,
  53         DSA_TAG_PROTO_EDSA              = DSA_TAG_PROTO_EDSA_VALUE,
  54         DSA_TAG_PROTO_GSWIP             = DSA_TAG_PROTO_GSWIP_VALUE,
  55         DSA_TAG_PROTO_KSZ9477           = DSA_TAG_PROTO_KSZ9477_VALUE,
  56         DSA_TAG_PROTO_KSZ9893           = DSA_TAG_PROTO_KSZ9893_VALUE,
  57         DSA_TAG_PROTO_LAN9303           = DSA_TAG_PROTO_LAN9303_VALUE,
  58         DSA_TAG_PROTO_MTK               = DSA_TAG_PROTO_MTK_VALUE,
  59         DSA_TAG_PROTO_QCA               = DSA_TAG_PROTO_QCA_VALUE,
  60         DSA_TAG_PROTO_TRAILER           = DSA_TAG_PROTO_TRAILER_VALUE,
  61         DSA_TAG_PROTO_8021Q             = DSA_TAG_PROTO_8021Q_VALUE,
  62         DSA_TAG_PROTO_SJA1105           = DSA_TAG_PROTO_SJA1105_VALUE,
  63         DSA_TAG_PROTO_KSZ8795           = DSA_TAG_PROTO_KSZ8795_VALUE,
  64         DSA_TAG_PROTO_OCELOT            = DSA_TAG_PROTO_OCELOT_VALUE,
  65         DSA_TAG_PROTO_AR9331            = DSA_TAG_PROTO_AR9331_VALUE,
  66 };
  67
  68 struct packet_type;
  69 struct dsa_switch;
  70
  71 struct dsa_device_ops {
  72         struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);
  73         struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
  74                                struct packet_type *pt);
  75         int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
  76                             int *offset);
  77         /* Used to determine which traffic should match the DSA filter in
  78          * eth_type_trans, and which, if any, should bypass it and be processed
  79          * as regular on the master net device.
  80          */
  81         bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
  82         unsigned int overhead;
  83         const char *name;
  84         enum dsa_tag_protocol proto;
  85 };
  86
  87 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-"
  88 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto)                            \
  89         MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE))
  90
  91 struct dsa_skb_cb {
  92         struct sk_buff *clone;
  93 };
  94
  95 struct __dsa_skb_cb {
  96         struct dsa_skb_cb cb;
  97         u8 priv[48 - sizeof(struct dsa_skb_cb)];
  98 };
  99
 100 #define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb))
 101
 102 #define DSA_SKB_CB_PRIV(skb)                    \
 103         ((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv))
 104
 105 struct dsa_switch_tree {
 106         struct list_head        list;
 107
 108         /* Notifier chain for switch-wide events */
 109         struct raw_notifier_head        nh;
 110
 111         /* Tree identifier */
 112         unsigned int index;
 113
 114         /* Number of switches attached to this tree */
 115         struct kref refcount;
 116
 117         /* Has this tree been applied to the hardware? */
 118         bool setup;
 119
 120         /*
 121          * Configuration data for the platform device that owns
 122          * this dsa switch tree instance.
 123          */
 124         struct dsa_platform_data        *pd;
 125
 126         /* List of switch ports */
 127         struct list_head ports;
 128
 129         /* List of DSA links composing the routing table */
 130         struct list_head rtable;
 131 };
 132
 133 /* TC matchall action types */
 134 enum dsa_port_mall_action_type {
 135         DSA_PORT_MALL_MIRROR,
 136         DSA_PORT_MALL_POLICER,
 137 };
 138
 139 /* TC mirroring entry */
 140 struct dsa_mall_mirror_tc_entry {
 141         u8 to_local_port;
 142         bool ingress;
 143 };
 144
 145 /* TC port policer entry */
 146 struct dsa_mall_policer_tc_entry {
 147         s64 burst;
 148         u64 rate_bytes_per_sec;
 149 };
 150
 151 /* TC matchall entry */
 152 struct dsa_mall_tc_entry {
 153         struct list_head list;
 154         unsigned long cookie;
 155         enum dsa_port_mall_action_type type;
 156         union {
 157                 struct dsa_mall_mirror_tc_entry mirror;
 158                 struct dsa_mall_policer_tc_entry policer;
 159         };
 160 };
 161
 162
 163 struct dsa_port {
 164         /* A CPU port is physically connected to a master device.
 165          * A user port exposed to userspace has a slave device.
 166          */
 167         union {
 168                 struct net_device *master;
 169                 struct net_device *slave;
 170         };
 171
 172         /* CPU port tagging operations used by master or slave devices */
 173         const struct dsa_device_ops *tag_ops;
 174
 175         /* Copies for faster access in master receive hot path */
 176         struct dsa_switch_tree *dst;
 177         struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
 178                                struct packet_type *pt);
 179         bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
 180
 181         enum {
 182                 DSA_PORT_TYPE_UNUSED = 0,
 183                 DSA_PORT_TYPE_CPU,
 184                 DSA_PORT_TYPE_DSA,
 185                 DSA_PORT_TYPE_USER,
 186         } type;
 187
 188         struct dsa_switch       *ds;
 189         unsigned int            index;
 190         const char              *name;
 191         struct dsa_port         *cpu_dp;
 192         const char              *mac;
 193         struct device_node      *dn;
 194         unsigned int            ageing_time;
 195         bool                    vlan_filtering;
 196         u8                      stp_state;
 197         struct net_device       *bridge_dev;
 198         struct devlink_port     devlink_port;
 199         struct phylink          *pl;
 200         struct phylink_config   pl_config;
 201
 202         struct list_head list;
 203
 204         /*
 205          * Give the switch driver somewhere to hang its per-port private data
 206          * structures (accessible from the tagger).
 207          */
 208         void *priv;
 209
 210         /*
 211          * Original copy of the master netdev ethtool_ops
 212          */
 213         const struct ethtool_ops *orig_ethtool_ops;
 214
 215         /*
 216          * Original copy of the master netdev net_device_ops
 217          */
 218         const struct net_device_ops *orig_ndo_ops;
 219
 220         bool setup;
 221 };
 222
 223 /* TODO: ideally DSA ports would have a single dp->link_dp member,
 224  * and no dst->rtable nor this struct dsa_link would be needed,
 225  * but this would require some more complex tree walking,
 226  * so keep it stupid at the moment and list them all.
 227  */
 228 struct dsa_link {
 229         struct dsa_port *dp;
 230         struct dsa_port *link_dp;
 231         struct list_head list;
 232 };
 233
 234 struct dsa_switch {
 235         bool setup;
 236
 237         struct device *dev;
 238
 239         /*
 240          * Parent switch tree, and switch index.
 241          */
 242         struct dsa_switch_tree  *dst;
 243         unsigned int            index;
 244
 245         /* Listener for switch fabric events */
 246         struct notifier_block   nb;
 247
 248         /*
 249          * Give the switch driver somewhere to hang its private data
 250          * structure.
 251          */
 252         void *priv;
 253
 254         /*
 255          * Configuration data for this switch.
 256          */
 257         struct dsa_chip_data    *cd;
 258
 259         /*
 260          * The switch operations.
 261          */
 262         const struct dsa_switch_ops     *ops;
 263
 264         /*
 265          * Slave mii_bus and devices for the individual ports.
 266          */
 267         u32                     phys_mii_mask;
 268         struct mii_bus          *slave_mii_bus;
 269
 270         /* Ageing Time limits in msecs */
 271         unsigned int ageing_time_min;
 272         unsigned int ageing_time_max;
 273
 274         /* devlink used to represent this switch device */
 275         struct devlink          *devlink;
 276
 277         /* Number of switch port queues */
 278         unsigned int            num_tx_queues;
 279
 280         /* Disallow bridge core from requesting different VLAN awareness
 281          * settings on ports if not hardware-supported
 282          */
 283         bool                    vlan_filtering_is_global;
 284
 285         /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges
 286          * that have vlan_filtering=0. All drivers should ideally set this (and
 287          * then the option would get removed), but it is unknown whether this
 288          * would break things or not.
 289          */
 290         bool                    configure_vlan_while_not_filtering;
 291
 292         /* In case vlan_filtering_is_global is set, the VLAN awareness state
 293          * should be retrieved from here and not from the per-port settings.
 294          */
 295         bool                    vlan_filtering;
 296
 297         /* MAC PCS does not provide link state change interrupt, and requires
 298          * polling. Flag passed on to PHYLINK.
 299          */
 300         bool                    pcs_poll;
 301
 302         /* For switches that only have the MRU configurable. To ensure the
 303          * configured MTU is not exceeded, normalization of MRU on all bridged
 304          * interfaces is needed.
 305          */
 306         bool                    mtu_enforcement_ingress;
 307
 308         size_t num_ports;
 309 };
 310
 311 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
 312 {
 313         struct dsa_switch_tree *dst = ds->dst;
 314         struct dsa_port *dp;
 315
 316         list_for_each_entry(dp, &dst->ports, list)
 317                 if (dp->ds == ds && dp->index == p)
 318                         return dp;
 319
 320         return NULL;
 321 }
 322
 323 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p)
 324 {
 325         return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;
 326 }
 327
 328 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
 329 {
 330         return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU;
 331 }
 332
 333 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
 334 {
 335         return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA;
 336 }
 337
 338 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p)
 339 {
 340         return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER;
 341 }
 342
 343 static inline u32 dsa_user_ports(struct dsa_switch *ds)
 344 {
 345         u32 mask = 0;
 346         int p;
 347
 348         for (p = 0; p < ds->num_ports; p++)
 349                 if (dsa_is_user_port(ds, p))
 350                         mask |= BIT(p);
 351
 352         return mask;
 353 }
 354
 355 /* Return the local port used to reach an arbitrary switch device */
 356 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device)
 357 {
 358         struct dsa_switch_tree *dst = ds->dst;
 359         struct dsa_link *dl;
 360
 361         list_for_each_entry(dl, &dst->rtable, list)
 362                 if (dl->dp->ds == ds && dl->link_dp->ds->index == device)
 363                         return dl->dp->index;
 364
 365         return ds->num_ports;
 366 }
 367
 368 /* Return the local port used to reach an arbitrary switch port */
 369 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device,
 370                                             int port)
 371 {
 372         if (device == ds->index)
 373                 return port;
 374         else
 375                 return dsa_routing_port(ds, device);
 376 }
 377
 378 /* Return the local port used to reach the dedicated CPU port */
 379 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port)
 380 {
 381         const struct dsa_port *dp = dsa_to_port(ds, port);
 382         const struct dsa_port *cpu_dp = dp->cpu_dp;
 383
 384         if (!cpu_dp)
 385                 return port;
 386
 387         return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index);
 388 }
 389
 390 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp)
 391 {
 392         const struct dsa_switch *ds = dp->ds;
 393
 394         if (ds->vlan_filtering_is_global)
 395                 return ds->vlan_filtering;
 396         else
 397                 return dp->vlan_filtering;
 398 }
 399
 400 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
 401                               bool is_static, void *data);
 402 struct dsa_switch_ops {
 403         enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
 404                                                   int port,
 405                                                   enum dsa_tag_protocol mprot);
 406
 407         int     (*setup)(struct dsa_switch *ds);
 408         void    (*teardown)(struct dsa_switch *ds);
 409         u32     (*get_phy_flags)(struct dsa_switch *ds, int port);
 410
 411         /*
 412          * Access to the switch's PHY registers.
 413          */
 414         int     (*phy_read)(struct dsa_switch *ds, int port, int regnum);
 415         int     (*phy_write)(struct dsa_switch *ds, int port,
 416                              int regnum, u16 val);
 417
 418         /*
 419          * Link state adjustment (called from libphy)
 420          */
 421         void    (*adjust_link)(struct dsa_switch *ds, int port,
 422                                 struct phy_device *phydev);
 423         void    (*fixed_link_update)(struct dsa_switch *ds, int port,
 424                                 struct fixed_phy_status *st);
 425
 426         /*
 427          * PHYLINK integration
 428          */
 429         void    (*phylink_validate)(struct dsa_switch *ds, int port,
 430                                     unsigned long *supported,
 431                                     struct phylink_link_state *state);
 432         int     (*phylink_mac_link_state)(struct dsa_switch *ds, int port,
 433                                           struct phylink_link_state *state);
 434         void    (*phylink_mac_config)(struct dsa_switch *ds, int port,
 435                                       unsigned int mode,
 436                                       const struct phylink_link_state *state);
 437         void    (*phylink_mac_an_restart)(struct dsa_switch *ds, int port);
 438         void    (*phylink_mac_link_down)(struct dsa_switch *ds, int port,
 439                                          unsigned int mode,
 440                                          phy_interface_t interface);
 441         void    (*phylink_mac_link_up)(struct dsa_switch *ds, int port,
 442                                        unsigned int mode,
 443                                        phy_interface_t interface,
 444                                        struct phy_device *phydev,
 445                                        int speed, int duplex,
 446                                        bool tx_pause, bool rx_pause);
 447         void    (*phylink_fixed_state)(struct dsa_switch *ds, int port,
 448                                        struct phylink_link_state *state);
 449         /*
 450          * ethtool hardware statistics.
 451          */
 452         void    (*get_strings)(struct dsa_switch *ds, int port,
 453                                u32 stringset, uint8_t *data);
 454         void    (*get_ethtool_stats)(struct dsa_switch *ds,
 455                                      int port, uint64_t *data);
 456         int     (*get_sset_count)(struct dsa_switch *ds, int port, int sset);
 457         void    (*get_ethtool_phy_stats)(struct dsa_switch *ds,
 458                                          int port, uint64_t *data);
 459
 460         /*
 461          * ethtool Wake-on-LAN
 462          */
 463         void    (*get_wol)(struct dsa_switch *ds, int port,
 464                            struct ethtool_wolinfo *w);
 465         int     (*set_wol)(struct dsa_switch *ds, int port,
 466                            struct ethtool_wolinfo *w);
 467
 468         /*
 469          * ethtool timestamp info
 470          */
 471         int     (*get_ts_info)(struct dsa_switch *ds, int port,
 472                                struct ethtool_ts_info *ts);
 473
 474         /*
 475          * Suspend and resume
 476          */
 477         int     (*suspend)(struct dsa_switch *ds);
 478         int     (*resume)(struct dsa_switch *ds);
 479
 480         /*
 481          * Port enable/disable
 482          */
 483         int     (*port_enable)(struct dsa_switch *ds, int port,
 484                                struct phy_device *phy);
 485         void    (*port_disable)(struct dsa_switch *ds, int port);
 486
 487         /*
 488          * Port's MAC EEE settings
 489          */
 490         int     (*set_mac_eee)(struct dsa_switch *ds, int port,
 491                                struct ethtool_eee *e);
 492         int     (*get_mac_eee)(struct dsa_switch *ds, int port,
 493                                struct ethtool_eee *e);
 494
 495         /* EEPROM access */
 496         int     (*get_eeprom_len)(struct dsa_switch *ds);
 497         int     (*get_eeprom)(struct dsa_switch *ds,
 498                               struct ethtool_eeprom *eeprom, u8 *data);
 499         int     (*set_eeprom)(struct dsa_switch *ds,
 500                               struct ethtool_eeprom *eeprom, u8 *data);
 501
 502         /*
 503          * Register access.
 504          */
 505         int     (*get_regs_len)(struct dsa_switch *ds, int port);
 506         void    (*get_regs)(struct dsa_switch *ds, int port,
 507                             struct ethtool_regs *regs, void *p);
 508
 509         /*
 510          * Bridge integration
 511          */
 512         int     (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
 513         int     (*port_bridge_join)(struct dsa_switch *ds, int port,
 514                                     struct net_device *bridge);
 515         void    (*port_bridge_leave)(struct dsa_switch *ds, int port,
 516                                      struct net_device *bridge);
 517         void    (*port_stp_state_set)(struct dsa_switch *ds, int port,
 518                                       u8 state);
 519         void    (*port_fast_age)(struct dsa_switch *ds, int port);
 520         int     (*port_egress_floods)(struct dsa_switch *ds, int port,
 521                                       bool unicast, bool multicast);
 522
 523         /*
 524          * VLAN support
 525          */
 526         int     (*port_vlan_filtering)(struct dsa_switch *ds, int port,
 527                                        bool vlan_filtering);
 528         int (*port_vlan_prepare)(struct dsa_switch *ds, int port,
 529                                  const struct switchdev_obj_port_vlan *vlan);
 530         void (*port_vlan_add)(struct dsa_switch *ds, int port,
 531                               const struct switchdev_obj_port_vlan *vlan);
 532         int     (*port_vlan_del)(struct dsa_switch *ds, int port,
 533                                  const struct switchdev_obj_port_vlan *vlan);
 534         /*
 535          * Forwarding database
 536          */
 537         int     (*port_fdb_add)(struct dsa_switch *ds, int port,
 538                                 const unsigned char *addr, u16 vid);
 539         int     (*port_fdb_del)(struct dsa_switch *ds, int port,
 540                                 const unsigned char *addr, u16 vid);
 541         int     (*port_fdb_dump)(struct dsa_switch *ds, int port,
 542                                  dsa_fdb_dump_cb_t *cb, void *data);
 543
 544         /*
 545          * Multicast database
 546          */
 547         int (*port_mdb_prepare)(struct dsa_switch *ds, int port,
 548                                 const struct switchdev_obj_port_mdb *mdb);
 549         void (*port_mdb_add)(struct dsa_switch *ds, int port,
 550                              const struct switchdev_obj_port_mdb *mdb);
 551         int     (*port_mdb_del)(struct dsa_switch *ds, int port,
 552                                 const struct switchdev_obj_port_mdb *mdb);
 553         /*
 554          * RXNFC
 555          */
 556         int     (*get_rxnfc)(struct dsa_switch *ds, int port,
 557                              struct ethtool_rxnfc *nfc, u32 *rule_locs);
 558         int     (*set_rxnfc)(struct dsa_switch *ds, int port,
 559                              struct ethtool_rxnfc *nfc);
 560
 561         /*
 562          * TC integration
 563          */
 564         int     (*cls_flower_add)(struct dsa_switch *ds, int port,
 565                                   struct flow_cls_offload *cls, bool ingress);
 566         int     (*cls_flower_del)(struct dsa_switch *ds, int port,
 567                                   struct flow_cls_offload *cls, bool ingress);
 568         int     (*cls_flower_stats)(struct dsa_switch *ds, int port,
 569                                     struct flow_cls_offload *cls, bool ingress);
 570         int     (*port_mirror_add)(struct dsa_switch *ds, int port,
 571                                    struct dsa_mall_mirror_tc_entry *mirror,
 572                                    bool ingress);
 573         void    (*port_mirror_del)(struct dsa_switch *ds, int port,
 574                                    struct dsa_mall_mirror_tc_entry *mirror);
 575         int     (*port_policer_add)(struct dsa_switch *ds, int port,
 576                                     struct dsa_mall_policer_tc_entry *policer);
 577         void    (*port_policer_del)(struct dsa_switch *ds, int port);
 578         int     (*port_setup_tc)(struct dsa_switch *ds, int port,
 579                                  enum tc_setup_type type, void *type_data);
 580
 581         /*
 582          * Cross-chip operations
 583          */
 584         int     (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index,
 585                                          int sw_index, int port,
 586                                          struct net_device *br);
 587         void    (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index,
 588                                           int sw_index, int port,
 589                                           struct net_device *br);
 590
 591         /*
 592          * PTP functionality
 593          */
 594         int     (*port_hwtstamp_get)(struct dsa_switch *ds, int port,
 595                                      struct ifreq *ifr);
 596         int     (*port_hwtstamp_set)(struct dsa_switch *ds, int port,
 597                                      struct ifreq *ifr);
 598         bool    (*port_txtstamp)(struct dsa_switch *ds, int port,
 599                                  struct sk_buff *clone, unsigned int type);
 600         bool    (*port_rxtstamp)(struct dsa_switch *ds, int port,
 601                                  struct sk_buff *skb, unsigned int type);
 602
 603         /* Devlink parameters */
 604         int     (*devlink_param_get)(struct dsa_switch *ds, u32 id,
 605                                      struct devlink_param_gset_ctx *ctx);
 606         int     (*devlink_param_set)(struct dsa_switch *ds, u32 id,
 607                                      struct devlink_param_gset_ctx *ctx);
 608
 609         /*
 610          * MTU change functionality. Switches can also adjust their MRU through
 611          * this method. By MTU, one understands the SDU (L2 payload) length.
 612          * If the switch needs to account for the DSA tag on the CPU port, this
 613          * method needs to to do so privately.
 614          */
 615         int     (*port_change_mtu)(struct dsa_switch *ds, int port,
 616                                    int new_mtu);
 617         int     (*port_max_mtu)(struct dsa_switch *ds, int port);
 618 };
 619
 620 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes)            \
 621         DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes,                \
 622                              dsa_devlink_param_get, dsa_devlink_param_set, NULL)
 623
 624 int dsa_devlink_param_get(struct devlink *dl, u32 id,
 625                           struct devlink_param_gset_ctx *ctx);
 626 int dsa_devlink_param_set(struct devlink *dl, u32 id,
 627                           struct devlink_param_gset_ctx *ctx);
 628 int dsa_devlink_params_register(struct dsa_switch *ds,
 629                                 const struct devlink_param *params,
 630                                 size_t params_count);
 631 void dsa_devlink_params_unregister(struct dsa_switch *ds,
 632                                    const struct devlink_param *params,
 633                                    size_t params_count);
 634 int dsa_devlink_resource_register(struct dsa_switch *ds,
 635                                   const char *resource_name,
 636                                   u64 resource_size,
 637                                   u64 resource_id,
 638                                   u64 parent_resource_id,
 639                                   const struct devlink_resource_size_params *size_params);
 640
 641 void dsa_devlink_resources_unregister(struct dsa_switch *ds);
 642
 643 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds,
 644                                            u64 resource_id,
 645                                            devlink_resource_occ_get_t *occ_get,
 646                                            void *occ_get_priv);
 647 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds,
 648                                              u64 resource_id);
 649 struct dsa_port *dsa_port_from_netdev(struct net_device *netdev);
 650
 651 struct dsa_devlink_priv {
 652         struct dsa_switch *ds;
 653 };
 654
 655 struct dsa_switch_driver {
 656         struct list_head        list;
 657         const struct dsa_switch_ops *ops;
 658 };
 659
 660 struct net_device *dsa_dev_to_net_device(struct device *dev);
 661
 662 /* Keep inline for faster access in hot path */
 663 static inline bool netdev_uses_dsa(const struct net_device *dev)
 664 {
 665 #if IS_ENABLED(CONFIG_NET_DSA)
 666         return dev->dsa_ptr && dev->dsa_ptr->rcv;
 667 #endif
 668         return false;
 669 }
 670
 671 static inline bool dsa_can_decode(const struct sk_buff *skb,
 672                                   struct net_device *dev)
 673 {
 674 #if IS_ENABLED(CONFIG_NET_DSA)
 675         return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev);
 676 #endif
 677         return false;
 678 }
 679
 680 void dsa_unregister_switch(struct dsa_switch *ds);
 681 int dsa_register_switch(struct dsa_switch *ds);
 682 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index);
 683 #ifdef CONFIG_PM_SLEEP
 684 int dsa_switch_suspend(struct dsa_switch *ds);
 685 int dsa_switch_resume(struct dsa_switch *ds);
 686 #else
 687 static inline int dsa_switch_suspend(struct dsa_switch *ds)
 688 {
 689         return 0;
 690 }
 691 static inline int dsa_switch_resume(struct dsa_switch *ds)
 692 {
 693         return 0;
 694 }
 695 #endif /* CONFIG_PM_SLEEP */
 696
 697 enum dsa_notifier_type {
 698         DSA_PORT_REGISTER,
 699         DSA_PORT_UNREGISTER,
 700 };
 701
 702 struct dsa_notifier_info {
 703         struct net_device *dev;
 704 };
 705
 706 struct dsa_notifier_register_info {
 707         struct dsa_notifier_info info;  /* must be first */
 708         struct net_device *master;
 709         unsigned int port_number;
 710         unsigned int switch_number;
 711 };
 712
 713 static inline struct net_device *
 714 dsa_notifier_info_to_dev(const struct dsa_notifier_info *info)
 715 {
 716         return info->dev;
 717 }
 718
 719 #if IS_ENABLED(CONFIG_NET_DSA)
 720 int register_dsa_notifier(struct notifier_block *nb);
 721 int unregister_dsa_notifier(struct notifier_block *nb);
 722 int call_dsa_notifiers(unsigned long val, struct net_device *dev,
 723                        struct dsa_notifier_info *info);
 724 #else
 725 static inline int register_dsa_notifier(struct notifier_block *nb)
 726 {
 727         return 0;
 728 }
 729
 730 static inline int unregister_dsa_notifier(struct notifier_block *nb)
 731 {
 732         return 0;
 733 }
 734
 735 static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev,
 736                                      struct dsa_notifier_info *info)
 737 {
 738         return NOTIFY_DONE;
 739 }
 740 #endif
 741
 742 /* Broadcom tag specific helpers to insert and extract queue/port number */
 743 #define BRCM_TAG_SET_PORT_QUEUE(p, q)   ((p) << 8 | q)
 744 #define BRCM_TAG_GET_PORT(v)            ((v) >> 8)
 745 #define BRCM_TAG_GET_QUEUE(v)           ((v) & 0xff)
 746
 747
 748 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev);
 749 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data);
 750 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data);
 751 int dsa_port_get_phy_sset_count(struct dsa_port *dp);
 752 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up);
 753
 754 struct dsa_tag_driver {
 755         const struct dsa_device_ops *ops;
 756         struct list_head list;
 757         struct module *owner;
 758 };
 759
 760 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[],
 761                               unsigned int count,
 762                               struct module *owner);
 763 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[],
 764                                 unsigned int count);
 765
 766 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \
 767 static int __init dsa_tag_driver_module_init(void)                      \
 768 {                                                                       \
 769         dsa_tag_drivers_register(__dsa_tag_drivers_array, __count,      \
 770                                  THIS_MODULE);                          \
 771         return 0;                                                       \
 772 }                                                                       \
 773 module_init(dsa_tag_driver_module_init);                                \
 774                                                                         \
 775 static void __exit dsa_tag_driver_module_exit(void)                     \
 776 {                                                                       \
 777         dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count);   \
 778 }                                                                       \
 779 module_exit(dsa_tag_driver_module_exit)
 780
 781 /**
 782  * module_dsa_tag_drivers() - Helper macro for registering DSA tag
 783  * drivers
 784  * @__ops_array: Array of tag driver strucutres
 785  *
 786  * Helper macro for DSA tag drivers which do not do anything special
 787  * in module init/exit. Each module may only use this macro once, and
 788  * calling it replaces module_init() and module_exit().
 789  */
 790 #define module_dsa_tag_drivers(__ops_array)                             \
 791 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array))
 792
 793 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops
 794
 795 /* Create a static structure we can build a linked list of dsa_tag
 796  * drivers
 797  */
 798 #define DSA_TAG_DRIVER(__ops)                                           \
 799 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = {             \
 800         .ops = &__ops,                                                  \
 801 }
 802
 803 /**
 804  * module_dsa_tag_driver() - Helper macro for registering a single DSA tag
 805  * driver
 806  * @__ops: Single tag driver structures
 807  *
 808  * Helper macro for DSA tag drivers which do not do anything special
 809  * in module init/exit. Each module may only use this macro once, and
 810  * calling it replaces module_init() and module_exit().
 811  */
 812 #define module_dsa_tag_driver(__ops)                                    \
 813 DSA_TAG_DRIVER(__ops);                                                  \
 814                                                                         \
 815 static struct dsa_tag_driver *dsa_tag_driver_array[] =  {               \
 816         &DSA_TAG_DRIVER_NAME(__ops)                                     \
 817 };                                                                      \
 818 module_dsa_tag_drivers(dsa_tag_driver_array)
 819 #endif
 820