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, only mirroring for now */
 134 enum dsa_port_mall_action_type {
 135         DSA_PORT_MALL_MIRROR,
 136 };
 137
 138 /* TC mirroring entry */
 139 struct dsa_mall_mirror_tc_entry {
 140         u8 to_local_port;
 141         bool ingress;
 142 };
 143
 144 /* TC matchall entry */
 145 struct dsa_mall_tc_entry {
 146         struct list_head list;
 147         unsigned long cookie;
 148         enum dsa_port_mall_action_type type;
 149         union {
 150                 struct dsa_mall_mirror_tc_entry mirror;
 151         };
 152 };
 153
 154
 155 struct dsa_port {
 156         /* A CPU port is physically connected to a master device.
 157          * A user port exposed to userspace has a slave device.
 158          */
 159         union {
 160                 struct net_device *master;
 161                 struct net_device *slave;
 162         };
 163
 164         /* CPU port tagging operations used by master or slave devices */
 165         const struct dsa_device_ops *tag_ops;
 166
 167         /* Copies for faster access in master receive hot path */
 168         struct dsa_switch_tree *dst;
 169         struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
 170                                struct packet_type *pt);
 171         bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
 172
 173         enum {
 174                 DSA_PORT_TYPE_UNUSED = 0,
 175                 DSA_PORT_TYPE_CPU,
 176                 DSA_PORT_TYPE_DSA,
 177                 DSA_PORT_TYPE_USER,
 178         } type;
 179
 180         struct dsa_switch       *ds;
 181         unsigned int            index;
 182         const char              *name;
 183         struct dsa_port         *cpu_dp;
 184         const char              *mac;
 185         struct device_node      *dn;
 186         unsigned int            ageing_time;
 187         bool                    vlan_filtering;
 188         u8                      stp_state;
 189         struct net_device       *bridge_dev;
 190         struct devlink_port     devlink_port;
 191         struct phylink          *pl;
 192         struct phylink_config   pl_config;
 193
 194         struct list_head list;
 195
 196         /*
 197          * Give the switch driver somewhere to hang its per-port private data
 198          * structures (accessible from the tagger).
 199          */
 200         void *priv;
 201
 202         /*
 203          * Original copy of the master netdev ethtool_ops
 204          */
 205         const struct ethtool_ops *orig_ethtool_ops;
 206
 207         /*
 208          * Original copy of the master netdev net_device_ops
 209          */
 210         const struct net_device_ops *orig_ndo_ops;
 211
 212         bool setup;
 213 };
 214
 215 /* TODO: ideally DSA ports would have a single dp->link_dp member,
 216  * and no dst->rtable nor this struct dsa_link would be needed,
 217  * but this would require some more complex tree walking,
 218  * so keep it stupid at the moment and list them all.
 219  */
 220 struct dsa_link {
 221         struct dsa_port *dp;
 222         struct dsa_port *link_dp;
 223         struct list_head list;
 224 };
 225
 226 struct dsa_switch {
 227         bool setup;
 228
 229         struct device *dev;
 230
 231         /*
 232          * Parent switch tree, and switch index.
 233          */
 234         struct dsa_switch_tree  *dst;
 235         unsigned int            index;
 236
 237         /* Listener for switch fabric events */
 238         struct notifier_block   nb;
 239
 240         /*
 241          * Give the switch driver somewhere to hang its private data
 242          * structure.
 243          */
 244         void *priv;
 245
 246         /*
 247          * Configuration data for this switch.
 248          */
 249         struct dsa_chip_data    *cd;
 250
 251         /*
 252          * The switch operations.
 253          */
 254         const struct dsa_switch_ops     *ops;
 255
 256         /*
 257          * Slave mii_bus and devices for the individual ports.
 258          */
 259         u32                     phys_mii_mask;
 260         struct mii_bus          *slave_mii_bus;
 261
 262         /* Ageing Time limits in msecs */
 263         unsigned int ageing_time_min;
 264         unsigned int ageing_time_max;
 265
 266         /* devlink used to represent this switch device */
 267         struct devlink          *devlink;
 268
 269         /* Number of switch port queues */
 270         unsigned int            num_tx_queues;
 271
 272         /* Disallow bridge core from requesting different VLAN awareness
 273          * settings on ports if not hardware-supported
 274          */
 275         bool                    vlan_filtering_is_global;
 276
 277         /* In case vlan_filtering_is_global is set, the VLAN awareness state
 278          * should be retrieved from here and not from the per-port settings.
 279          */
 280         bool                    vlan_filtering;
 281
 282         /* MAC PCS does not provide link state change interrupt, and requires
 283          * polling. Flag passed on to PHYLINK.
 284          */
 285         bool                    pcs_poll;
 286
 287         size_t num_ports;
 288 };
 289
 290 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
 291 {
 292         struct dsa_switch_tree *dst = ds->dst;
 293         struct dsa_port *dp;
 294
 295         list_for_each_entry(dp, &dst->ports, list)
 296                 if (dp->ds == ds && dp->index == p)
 297                         return dp;
 298
 299         return NULL;
 300 }
 301
 302 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p)
 303 {
 304         return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;
 305 }
 306
 307 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
 308 {
 309         return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU;
 310 }
 311
 312 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
 313 {
 314         return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA;
 315 }
 316
 317 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p)
 318 {
 319         return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER;
 320 }
 321
 322 static inline u32 dsa_user_ports(struct dsa_switch *ds)
 323 {
 324         u32 mask = 0;
 325         int p;
 326
 327         for (p = 0; p < ds->num_ports; p++)
 328                 if (dsa_is_user_port(ds, p))
 329                         mask |= BIT(p);
 330
 331         return mask;
 332 }
 333
 334 /* Return the local port used to reach an arbitrary switch device */
 335 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device)
 336 {
 337         struct dsa_switch_tree *dst = ds->dst;
 338         struct dsa_link *dl;
 339
 340         list_for_each_entry(dl, &dst->rtable, list)
 341                 if (dl->dp->ds == ds && dl->link_dp->ds->index == device)
 342                         return dl->dp->index;
 343
 344         return ds->num_ports;
 345 }
 346
 347 /* Return the local port used to reach an arbitrary switch port */
 348 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device,
 349                                             int port)
 350 {
 351         if (device == ds->index)
 352                 return port;
 353         else
 354                 return dsa_routing_port(ds, device);
 355 }
 356
 357 /* Return the local port used to reach the dedicated CPU port */
 358 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port)
 359 {
 360         const struct dsa_port *dp = dsa_to_port(ds, port);
 361         const struct dsa_port *cpu_dp = dp->cpu_dp;
 362
 363         if (!cpu_dp)
 364                 return port;
 365
 366         return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index);
 367 }
 368
 369 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp)
 370 {
 371         const struct dsa_switch *ds = dp->ds;
 372
 373         if (ds->vlan_filtering_is_global)
 374                 return ds->vlan_filtering;
 375         else
 376                 return dp->vlan_filtering;
 377 }
 378
 379 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
 380                               bool is_static, void *data);
 381 struct dsa_switch_ops {
 382         enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
 383                                                   int port,
 384                                                   enum dsa_tag_protocol mprot);
 385
 386         int     (*setup)(struct dsa_switch *ds);
 387         void    (*teardown)(struct dsa_switch *ds);
 388         u32     (*get_phy_flags)(struct dsa_switch *ds, int port);
 389
 390         /*
 391          * Access to the switch's PHY registers.
 392          */
 393         int     (*phy_read)(struct dsa_switch *ds, int port, int regnum);
 394         int     (*phy_write)(struct dsa_switch *ds, int port,
 395                              int regnum, u16 val);
 396
 397         /*
 398          * Link state adjustment (called from libphy)
 399          */
 400         void    (*adjust_link)(struct dsa_switch *ds, int port,
 401                                 struct phy_device *phydev);
 402         void    (*fixed_link_update)(struct dsa_switch *ds, int port,
 403                                 struct fixed_phy_status *st);
 404
 405         /*
 406          * PHYLINK integration
 407          */
 408         void    (*phylink_validate)(struct dsa_switch *ds, int port,
 409                                     unsigned long *supported,
 410                                     struct phylink_link_state *state);
 411         int     (*phylink_mac_link_state)(struct dsa_switch *ds, int port,
 412                                           struct phylink_link_state *state);
 413         void    (*phylink_mac_config)(struct dsa_switch *ds, int port,
 414                                       unsigned int mode,
 415                                       const struct phylink_link_state *state);
 416         void    (*phylink_mac_an_restart)(struct dsa_switch *ds, int port);
 417         void    (*phylink_mac_link_down)(struct dsa_switch *ds, int port,
 418                                          unsigned int mode,
 419                                          phy_interface_t interface);
 420         void    (*phylink_mac_link_up)(struct dsa_switch *ds, int port,
 421                                        unsigned int mode,
 422                                        phy_interface_t interface,
 423                                        struct phy_device *phydev);
 424         void    (*phylink_fixed_state)(struct dsa_switch *ds, int port,
 425                                        struct phylink_link_state *state);
 426         /*
 427          * ethtool hardware statistics.
 428          */
 429         void    (*get_strings)(struct dsa_switch *ds, int port,
 430                                u32 stringset, uint8_t *data);
 431         void    (*get_ethtool_stats)(struct dsa_switch *ds,
 432                                      int port, uint64_t *data);
 433         int     (*get_sset_count)(struct dsa_switch *ds, int port, int sset);
 434         void    (*get_ethtool_phy_stats)(struct dsa_switch *ds,
 435                                          int port, uint64_t *data);
 436
 437         /*
 438          * ethtool Wake-on-LAN
 439          */
 440         void    (*get_wol)(struct dsa_switch *ds, int port,
 441                            struct ethtool_wolinfo *w);
 442         int     (*set_wol)(struct dsa_switch *ds, int port,
 443                            struct ethtool_wolinfo *w);
 444
 445         /*
 446          * ethtool timestamp info
 447          */
 448         int     (*get_ts_info)(struct dsa_switch *ds, int port,
 449                                struct ethtool_ts_info *ts);
 450
 451         /*
 452          * Suspend and resume
 453          */
 454         int     (*suspend)(struct dsa_switch *ds);
 455         int     (*resume)(struct dsa_switch *ds);
 456
 457         /*
 458          * Port enable/disable
 459          */
 460         int     (*port_enable)(struct dsa_switch *ds, int port,
 461                                struct phy_device *phy);
 462         void    (*port_disable)(struct dsa_switch *ds, int port);
 463
 464         /*
 465          * Port's MAC EEE settings
 466          */
 467         int     (*set_mac_eee)(struct dsa_switch *ds, int port,
 468                                struct ethtool_eee *e);
 469         int     (*get_mac_eee)(struct dsa_switch *ds, int port,
 470                                struct ethtool_eee *e);
 471
 472         /* EEPROM access */
 473         int     (*get_eeprom_len)(struct dsa_switch *ds);
 474         int     (*get_eeprom)(struct dsa_switch *ds,
 475                               struct ethtool_eeprom *eeprom, u8 *data);
 476         int     (*set_eeprom)(struct dsa_switch *ds,
 477                               struct ethtool_eeprom *eeprom, u8 *data);
 478
 479         /*
 480          * Register access.
 481          */
 482         int     (*get_regs_len)(struct dsa_switch *ds, int port);
 483         void    (*get_regs)(struct dsa_switch *ds, int port,
 484                             struct ethtool_regs *regs, void *p);
 485
 486         /*
 487          * Bridge integration
 488          */
 489         int     (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
 490         int     (*port_bridge_join)(struct dsa_switch *ds, int port,
 491                                     struct net_device *bridge);
 492         void    (*port_bridge_leave)(struct dsa_switch *ds, int port,
 493                                      struct net_device *bridge);
 494         void    (*port_stp_state_set)(struct dsa_switch *ds, int port,
 495                                       u8 state);
 496         void    (*port_fast_age)(struct dsa_switch *ds, int port);
 497         int     (*port_egress_floods)(struct dsa_switch *ds, int port,
 498                                       bool unicast, bool multicast);
 499
 500         /*
 501          * VLAN support
 502          */
 503         int     (*port_vlan_filtering)(struct dsa_switch *ds, int port,
 504                                        bool vlan_filtering);
 505         int (*port_vlan_prepare)(struct dsa_switch *ds, int port,
 506                                  const struct switchdev_obj_port_vlan *vlan);
 507         void (*port_vlan_add)(struct dsa_switch *ds, int port,
 508                               const struct switchdev_obj_port_vlan *vlan);
 509         int     (*port_vlan_del)(struct dsa_switch *ds, int port,
 510                                  const struct switchdev_obj_port_vlan *vlan);
 511         /*
 512          * Forwarding database
 513          */
 514         int     (*port_fdb_add)(struct dsa_switch *ds, int port,
 515                                 const unsigned char *addr, u16 vid);
 516         int     (*port_fdb_del)(struct dsa_switch *ds, int port,
 517                                 const unsigned char *addr, u16 vid);
 518         int     (*port_fdb_dump)(struct dsa_switch *ds, int port,
 519                                  dsa_fdb_dump_cb_t *cb, void *data);
 520
 521         /*
 522          * Multicast database
 523          */
 524         int (*port_mdb_prepare)(struct dsa_switch *ds, int port,
 525                                 const struct switchdev_obj_port_mdb *mdb);
 526         void (*port_mdb_add)(struct dsa_switch *ds, int port,
 527                              const struct switchdev_obj_port_mdb *mdb);
 528         int     (*port_mdb_del)(struct dsa_switch *ds, int port,
 529                                 const struct switchdev_obj_port_mdb *mdb);
 530         /*
 531          * RXNFC
 532          */
 533         int     (*get_rxnfc)(struct dsa_switch *ds, int port,
 534                              struct ethtool_rxnfc *nfc, u32 *rule_locs);
 535         int     (*set_rxnfc)(struct dsa_switch *ds, int port,
 536                              struct ethtool_rxnfc *nfc);
 537
 538         /*
 539          * TC integration
 540          */
 541         int     (*port_mirror_add)(struct dsa_switch *ds, int port,
 542                                    struct dsa_mall_mirror_tc_entry *mirror,
 543                                    bool ingress);
 544         void    (*port_mirror_del)(struct dsa_switch *ds, int port,
 545                                    struct dsa_mall_mirror_tc_entry *mirror);
 546         int     (*port_setup_tc)(struct dsa_switch *ds, int port,
 547                                  enum tc_setup_type type, void *type_data);
 548
 549         /*
 550          * Cross-chip operations
 551          */
 552         int     (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index,
 553                                          int port, struct net_device *br);
 554         void    (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index,
 555                                           int port, struct net_device *br);
 556
 557         /*
 558          * PTP functionality
 559          */
 560         int     (*port_hwtstamp_get)(struct dsa_switch *ds, int port,
 561                                      struct ifreq *ifr);
 562         int     (*port_hwtstamp_set)(struct dsa_switch *ds, int port,
 563                                      struct ifreq *ifr);
 564         bool    (*port_txtstamp)(struct dsa_switch *ds, int port,
 565                                  struct sk_buff *clone, unsigned int type);
 566         bool    (*port_rxtstamp)(struct dsa_switch *ds, int port,
 567                                  struct sk_buff *skb, unsigned int type);
 568
 569         /* Devlink parameters */
 570         int     (*devlink_param_get)(struct dsa_switch *ds, u32 id,
 571                                      struct devlink_param_gset_ctx *ctx);
 572         int     (*devlink_param_set)(struct dsa_switch *ds, u32 id,
 573                                      struct devlink_param_gset_ctx *ctx);
 574 };
 575
 576 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes)            \
 577         DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes,                \
 578                              dsa_devlink_param_get, dsa_devlink_param_set, NULL)
 579
 580 int dsa_devlink_param_get(struct devlink *dl, u32 id,
 581                           struct devlink_param_gset_ctx *ctx);
 582 int dsa_devlink_param_set(struct devlink *dl, u32 id,
 583                           struct devlink_param_gset_ctx *ctx);
 584 int dsa_devlink_params_register(struct dsa_switch *ds,
 585                                 const struct devlink_param *params,
 586                                 size_t params_count);
 587 void dsa_devlink_params_unregister(struct dsa_switch *ds,
 588                                    const struct devlink_param *params,
 589                                    size_t params_count);
 590 int dsa_devlink_resource_register(struct dsa_switch *ds,
 591                                   const char *resource_name,
 592                                   u64 resource_size,
 593                                   u64 resource_id,
 594                                   u64 parent_resource_id,
 595                                   const struct devlink_resource_size_params *size_params);
 596
 597 void dsa_devlink_resources_unregister(struct dsa_switch *ds);
 598
 599 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds,
 600                                            u64 resource_id,
 601                                            devlink_resource_occ_get_t *occ_get,
 602                                            void *occ_get_priv);
 603 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds,
 604                                              u64 resource_id);
 605
 606 struct dsa_devlink_priv {
 607         struct dsa_switch *ds;
 608 };
 609
 610 struct dsa_switch_driver {
 611         struct list_head        list;
 612         const struct dsa_switch_ops *ops;
 613 };
 614
 615 struct net_device *dsa_dev_to_net_device(struct device *dev);
 616
 617 /* Keep inline for faster access in hot path */
 618 static inline bool netdev_uses_dsa(struct net_device *dev)
 619 {
 620 #if IS_ENABLED(CONFIG_NET_DSA)
 621         return dev->dsa_ptr && dev->dsa_ptr->rcv;
 622 #endif
 623         return false;
 624 }
 625
 626 static inline bool dsa_can_decode(const struct sk_buff *skb,
 627                                   struct net_device *dev)
 628 {
 629 #if IS_ENABLED(CONFIG_NET_DSA)
 630         return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev);
 631 #endif
 632         return false;
 633 }
 634
 635 void dsa_unregister_switch(struct dsa_switch *ds);
 636 int dsa_register_switch(struct dsa_switch *ds);
 637 #ifdef CONFIG_PM_SLEEP
 638 int dsa_switch_suspend(struct dsa_switch *ds);
 639 int dsa_switch_resume(struct dsa_switch *ds);
 640 #else
 641 static inline int dsa_switch_suspend(struct dsa_switch *ds)
 642 {
 643         return 0;
 644 }
 645 static inline int dsa_switch_resume(struct dsa_switch *ds)
 646 {
 647         return 0;
 648 }
 649 #endif /* CONFIG_PM_SLEEP */
 650
 651 enum dsa_notifier_type {
 652         DSA_PORT_REGISTER,
 653         DSA_PORT_UNREGISTER,
 654 };
 655
 656 struct dsa_notifier_info {
 657         struct net_device *dev;
 658 };
 659
 660 struct dsa_notifier_register_info {
 661         struct dsa_notifier_info info;  /* must be first */
 662         struct net_device *master;
 663         unsigned int port_number;
 664         unsigned int switch_number;
 665 };
 666
 667 static inline struct net_device *
 668 dsa_notifier_info_to_dev(const struct dsa_notifier_info *info)
 669 {
 670         return info->dev;
 671 }
 672
 673 #if IS_ENABLED(CONFIG_NET_DSA)
 674 int register_dsa_notifier(struct notifier_block *nb);
 675 int unregister_dsa_notifier(struct notifier_block *nb);
 676 int call_dsa_notifiers(unsigned long val, struct net_device *dev,
 677                        struct dsa_notifier_info *info);
 678 #else
 679 static inline int register_dsa_notifier(struct notifier_block *nb)
 680 {
 681         return 0;
 682 }
 683
 684 static inline int unregister_dsa_notifier(struct notifier_block *nb)
 685 {
 686         return 0;
 687 }
 688
 689 static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev,
 690                                      struct dsa_notifier_info *info)
 691 {
 692         return NOTIFY_DONE;
 693 }
 694 #endif
 695
 696 /* Broadcom tag specific helpers to insert and extract queue/port number */
 697 #define BRCM_TAG_SET_PORT_QUEUE(p, q)   ((p) << 8 | q)
 698 #define BRCM_TAG_GET_PORT(v)            ((v) >> 8)
 699 #define BRCM_TAG_GET_QUEUE(v)           ((v) & 0xff)
 700
 701
 702 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev);
 703 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data);
 704 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data);
 705 int dsa_port_get_phy_sset_count(struct dsa_port *dp);
 706 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up);
 707
 708 struct dsa_tag_driver {
 709         const struct dsa_device_ops *ops;
 710         struct list_head list;
 711         struct module *owner;
 712 };
 713
 714 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[],
 715                               unsigned int count,
 716                               struct module *owner);
 717 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[],
 718                                 unsigned int count);
 719
 720 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \
 721 static int __init dsa_tag_driver_module_init(void)                      \
 722 {                                                                       \
 723         dsa_tag_drivers_register(__dsa_tag_drivers_array, __count,      \
 724                                  THIS_MODULE);                          \
 725         return 0;                                                       \
 726 }                                                                       \
 727 module_init(dsa_tag_driver_module_init);                                \
 728                                                                         \
 729 static void __exit dsa_tag_driver_module_exit(void)                     \
 730 {                                                                       \
 731         dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count);   \
 732 }                                                                       \
 733 module_exit(dsa_tag_driver_module_exit)
 734
 735 /**
 736  * module_dsa_tag_drivers() - Helper macro for registering DSA tag
 737  * drivers
 738  * @__ops_array: Array of tag driver strucutres
 739  *
 740  * Helper macro for DSA tag drivers which do not do anything special
 741  * in module init/exit. Each module may only use this macro once, and
 742  * calling it replaces module_init() and module_exit().
 743  */
 744 #define module_dsa_tag_drivers(__ops_array)                             \
 745 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array))
 746
 747 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops
 748
 749 /* Create a static structure we can build a linked list of dsa_tag
 750  * drivers
 751  */
 752 #define DSA_TAG_DRIVER(__ops)                                           \
 753 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = {             \
 754         .ops = &__ops,                                                  \
 755 }
 756
 757 /**
 758  * module_dsa_tag_driver() - Helper macro for registering a single DSA tag
 759  * driver
 760  * @__ops: Single tag driver structures
 761  *
 762  * Helper macro for DSA tag drivers which do not do anything special
 763  * in module init/exit. Each module may only use this macro once, and
 764  * calling it replaces module_init() and module_exit().
 765  */
 766 #define module_dsa_tag_driver(__ops)                                    \
 767 DSA_TAG_DRIVER(__ops);                                                  \
 768                                                                         \
 769 static struct dsa_tag_driver *dsa_tag_driver_array[] =  {               \
 770         &DSA_TAG_DRIVER_NAME(__ops)                                     \
 771 };                                                                      \
 772 module_dsa_tag_drivers(dsa_tag_driver_array)
 773 #endif
 774