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0001 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
0002 /* Microsemi Ocelot Switch driver
0003  *
0004  * This contains glue logic between the switchdev driver operations and the
0005  * mscc_ocelot_switch_lib.
0006  *
0007  * Copyright (c) 2017, 2019 Microsemi Corporation
0008  * Copyright 2020-2021 NXP
0009  */
0010 
0011 #include <linux/dsa/ocelot.h>
0012 #include <linux/if_bridge.h>
0013 #include <linux/of_net.h>
0014 #include <linux/phy/phy.h>
0015 #include <net/pkt_cls.h>
0016 #include "ocelot.h"
0017 #include "ocelot_police.h"
0018 #include "ocelot_vcap.h"
0019 #include "ocelot_fdma.h"
0020 
0021 #define OCELOT_MAC_QUIRKS   OCELOT_QUIRK_QSGMII_PORTS_MUST_BE_UP
0022 
0023 static bool ocelot_netdevice_dev_check(const struct net_device *dev);
0024 
0025 static struct ocelot *devlink_port_to_ocelot(struct devlink_port *dlp)
0026 {
0027     return devlink_priv(dlp->devlink);
0028 }
0029 
0030 static int devlink_port_to_port(struct devlink_port *dlp)
0031 {
0032     struct ocelot *ocelot = devlink_port_to_ocelot(dlp);
0033 
0034     return dlp - ocelot->devlink_ports;
0035 }
0036 
0037 static int ocelot_devlink_sb_pool_get(struct devlink *dl,
0038                       unsigned int sb_index, u16 pool_index,
0039                       struct devlink_sb_pool_info *pool_info)
0040 {
0041     struct ocelot *ocelot = devlink_priv(dl);
0042 
0043     return ocelot_sb_pool_get(ocelot, sb_index, pool_index, pool_info);
0044 }
0045 
0046 static int ocelot_devlink_sb_pool_set(struct devlink *dl, unsigned int sb_index,
0047                       u16 pool_index, u32 size,
0048                       enum devlink_sb_threshold_type threshold_type,
0049                       struct netlink_ext_ack *extack)
0050 {
0051     struct ocelot *ocelot = devlink_priv(dl);
0052 
0053     return ocelot_sb_pool_set(ocelot, sb_index, pool_index, size,
0054                   threshold_type, extack);
0055 }
0056 
0057 static int ocelot_devlink_sb_port_pool_get(struct devlink_port *dlp,
0058                        unsigned int sb_index, u16 pool_index,
0059                        u32 *p_threshold)
0060 {
0061     struct ocelot *ocelot = devlink_port_to_ocelot(dlp);
0062     int port = devlink_port_to_port(dlp);
0063 
0064     return ocelot_sb_port_pool_get(ocelot, port, sb_index, pool_index,
0065                        p_threshold);
0066 }
0067 
0068 static int ocelot_devlink_sb_port_pool_set(struct devlink_port *dlp,
0069                        unsigned int sb_index, u16 pool_index,
0070                        u32 threshold,
0071                        struct netlink_ext_ack *extack)
0072 {
0073     struct ocelot *ocelot = devlink_port_to_ocelot(dlp);
0074     int port = devlink_port_to_port(dlp);
0075 
0076     return ocelot_sb_port_pool_set(ocelot, port, sb_index, pool_index,
0077                        threshold, extack);
0078 }
0079 
0080 static int
0081 ocelot_devlink_sb_tc_pool_bind_get(struct devlink_port *dlp,
0082                    unsigned int sb_index, u16 tc_index,
0083                    enum devlink_sb_pool_type pool_type,
0084                    u16 *p_pool_index, u32 *p_threshold)
0085 {
0086     struct ocelot *ocelot = devlink_port_to_ocelot(dlp);
0087     int port = devlink_port_to_port(dlp);
0088 
0089     return ocelot_sb_tc_pool_bind_get(ocelot, port, sb_index, tc_index,
0090                       pool_type, p_pool_index,
0091                       p_threshold);
0092 }
0093 
0094 static int
0095 ocelot_devlink_sb_tc_pool_bind_set(struct devlink_port *dlp,
0096                    unsigned int sb_index, u16 tc_index,
0097                    enum devlink_sb_pool_type pool_type,
0098                    u16 pool_index, u32 threshold,
0099                    struct netlink_ext_ack *extack)
0100 {
0101     struct ocelot *ocelot = devlink_port_to_ocelot(dlp);
0102     int port = devlink_port_to_port(dlp);
0103 
0104     return ocelot_sb_tc_pool_bind_set(ocelot, port, sb_index, tc_index,
0105                       pool_type, pool_index, threshold,
0106                       extack);
0107 }
0108 
0109 static int ocelot_devlink_sb_occ_snapshot(struct devlink *dl,
0110                       unsigned int sb_index)
0111 {
0112     struct ocelot *ocelot = devlink_priv(dl);
0113 
0114     return ocelot_sb_occ_snapshot(ocelot, sb_index);
0115 }
0116 
0117 static int ocelot_devlink_sb_occ_max_clear(struct devlink *dl,
0118                        unsigned int sb_index)
0119 {
0120     struct ocelot *ocelot = devlink_priv(dl);
0121 
0122     return ocelot_sb_occ_max_clear(ocelot, sb_index);
0123 }
0124 
0125 static int ocelot_devlink_sb_occ_port_pool_get(struct devlink_port *dlp,
0126                            unsigned int sb_index,
0127                            u16 pool_index, u32 *p_cur,
0128                            u32 *p_max)
0129 {
0130     struct ocelot *ocelot = devlink_port_to_ocelot(dlp);
0131     int port = devlink_port_to_port(dlp);
0132 
0133     return ocelot_sb_occ_port_pool_get(ocelot, port, sb_index, pool_index,
0134                        p_cur, p_max);
0135 }
0136 
0137 static int
0138 ocelot_devlink_sb_occ_tc_port_bind_get(struct devlink_port *dlp,
0139                        unsigned int sb_index, u16 tc_index,
0140                        enum devlink_sb_pool_type pool_type,
0141                        u32 *p_cur, u32 *p_max)
0142 {
0143     struct ocelot *ocelot = devlink_port_to_ocelot(dlp);
0144     int port = devlink_port_to_port(dlp);
0145 
0146     return ocelot_sb_occ_tc_port_bind_get(ocelot, port, sb_index,
0147                           tc_index, pool_type,
0148                           p_cur, p_max);
0149 }
0150 
0151 const struct devlink_ops ocelot_devlink_ops = {
0152     .sb_pool_get            = ocelot_devlink_sb_pool_get,
0153     .sb_pool_set            = ocelot_devlink_sb_pool_set,
0154     .sb_port_pool_get       = ocelot_devlink_sb_port_pool_get,
0155     .sb_port_pool_set       = ocelot_devlink_sb_port_pool_set,
0156     .sb_tc_pool_bind_get        = ocelot_devlink_sb_tc_pool_bind_get,
0157     .sb_tc_pool_bind_set        = ocelot_devlink_sb_tc_pool_bind_set,
0158     .sb_occ_snapshot        = ocelot_devlink_sb_occ_snapshot,
0159     .sb_occ_max_clear       = ocelot_devlink_sb_occ_max_clear,
0160     .sb_occ_port_pool_get       = ocelot_devlink_sb_occ_port_pool_get,
0161     .sb_occ_tc_port_bind_get    = ocelot_devlink_sb_occ_tc_port_bind_get,
0162 };
0163 
0164 int ocelot_port_devlink_init(struct ocelot *ocelot, int port,
0165                  enum devlink_port_flavour flavour)
0166 {
0167     struct devlink_port *dlp = &ocelot->devlink_ports[port];
0168     int id_len = sizeof(ocelot->base_mac);
0169     struct devlink *dl = ocelot->devlink;
0170     struct devlink_port_attrs attrs = {};
0171 
0172     memset(dlp, 0, sizeof(*dlp));
0173     memcpy(attrs.switch_id.id, &ocelot->base_mac, id_len);
0174     attrs.switch_id.id_len = id_len;
0175     attrs.phys.port_number = port;
0176     attrs.flavour = flavour;
0177 
0178     devlink_port_attrs_set(dlp, &attrs);
0179 
0180     return devlink_port_register(dl, dlp, port);
0181 }
0182 
0183 void ocelot_port_devlink_teardown(struct ocelot *ocelot, int port)
0184 {
0185     struct devlink_port *dlp = &ocelot->devlink_ports[port];
0186 
0187     devlink_port_unregister(dlp);
0188 }
0189 
0190 static struct devlink_port *ocelot_get_devlink_port(struct net_device *dev)
0191 {
0192     struct ocelot_port_private *priv = netdev_priv(dev);
0193     struct ocelot *ocelot = priv->port.ocelot;
0194     int port = priv->port.index;
0195 
0196     return &ocelot->devlink_ports[port];
0197 }
0198 
0199 int ocelot_setup_tc_cls_flower(struct ocelot_port_private *priv,
0200                    struct flow_cls_offload *f,
0201                    bool ingress)
0202 {
0203     struct ocelot *ocelot = priv->port.ocelot;
0204     int port = priv->port.index;
0205 
0206     if (!ingress)
0207         return -EOPNOTSUPP;
0208 
0209     switch (f->command) {
0210     case FLOW_CLS_REPLACE:
0211         return ocelot_cls_flower_replace(ocelot, port, f, ingress);
0212     case FLOW_CLS_DESTROY:
0213         return ocelot_cls_flower_destroy(ocelot, port, f, ingress);
0214     case FLOW_CLS_STATS:
0215         return ocelot_cls_flower_stats(ocelot, port, f, ingress);
0216     default:
0217         return -EOPNOTSUPP;
0218     }
0219 }
0220 
0221 static int ocelot_setup_tc_cls_matchall_police(struct ocelot_port_private *priv,
0222                            struct tc_cls_matchall_offload *f,
0223                            bool ingress,
0224                            struct netlink_ext_ack *extack)
0225 {
0226     struct flow_action_entry *action = &f->rule->action.entries[0];
0227     struct ocelot *ocelot = priv->port.ocelot;
0228     struct ocelot_policer pol = { 0 };
0229     int port = priv->port.index;
0230     int err;
0231 
0232     if (!ingress) {
0233         NL_SET_ERR_MSG_MOD(extack, "Only ingress is supported");
0234         return -EOPNOTSUPP;
0235     }
0236 
0237     if (priv->tc.police_id && priv->tc.police_id != f->cookie) {
0238         NL_SET_ERR_MSG_MOD(extack,
0239                    "Only one policer per port is supported");
0240         return -EEXIST;
0241     }
0242 
0243     err = ocelot_policer_validate(&f->rule->action, action, extack);
0244     if (err)
0245         return err;
0246 
0247     pol.rate = (u32)div_u64(action->police.rate_bytes_ps, 1000) * 8;
0248     pol.burst = action->police.burst;
0249 
0250     err = ocelot_port_policer_add(ocelot, port, &pol);
0251     if (err) {
0252         NL_SET_ERR_MSG_MOD(extack, "Could not add policer");
0253         return err;
0254     }
0255 
0256     priv->tc.police_id = f->cookie;
0257     priv->tc.offload_cnt++;
0258 
0259     return 0;
0260 }
0261 
0262 static int ocelot_setup_tc_cls_matchall_mirred(struct ocelot_port_private *priv,
0263                            struct tc_cls_matchall_offload *f,
0264                            bool ingress,
0265                            struct netlink_ext_ack *extack)
0266 {
0267     struct flow_action *action = &f->rule->action;
0268     struct ocelot *ocelot = priv->port.ocelot;
0269     struct ocelot_port_private *other_priv;
0270     const struct flow_action_entry *a;
0271     int err;
0272 
0273     if (f->common.protocol != htons(ETH_P_ALL))
0274         return -EOPNOTSUPP;
0275 
0276     if (!flow_action_basic_hw_stats_check(action, extack))
0277         return -EOPNOTSUPP;
0278 
0279     a = &action->entries[0];
0280     if (!a->dev)
0281         return -EINVAL;
0282 
0283     if (!ocelot_netdevice_dev_check(a->dev)) {
0284         NL_SET_ERR_MSG_MOD(extack,
0285                    "Destination not an ocelot port");
0286         return -EOPNOTSUPP;
0287     }
0288 
0289     other_priv = netdev_priv(a->dev);
0290 
0291     err = ocelot_port_mirror_add(ocelot, priv->port.index,
0292                      other_priv->port.index, ingress, extack);
0293     if (err)
0294         return err;
0295 
0296     if (ingress)
0297         priv->tc.ingress_mirred_id = f->cookie;
0298     else
0299         priv->tc.egress_mirred_id = f->cookie;
0300     priv->tc.offload_cnt++;
0301 
0302     return 0;
0303 }
0304 
0305 static int ocelot_del_tc_cls_matchall_police(struct ocelot_port_private *priv,
0306                          struct netlink_ext_ack *extack)
0307 {
0308     struct ocelot *ocelot = priv->port.ocelot;
0309     int port = priv->port.index;
0310     int err;
0311 
0312     err = ocelot_port_policer_del(ocelot, port);
0313     if (err) {
0314         NL_SET_ERR_MSG_MOD(extack,
0315                    "Could not delete policer");
0316         return err;
0317     }
0318 
0319     priv->tc.police_id = 0;
0320     priv->tc.offload_cnt--;
0321 
0322     return 0;
0323 }
0324 
0325 static int ocelot_del_tc_cls_matchall_mirred(struct ocelot_port_private *priv,
0326                          bool ingress,
0327                          struct netlink_ext_ack *extack)
0328 {
0329     struct ocelot *ocelot = priv->port.ocelot;
0330     int port = priv->port.index;
0331 
0332     ocelot_port_mirror_del(ocelot, port, ingress);
0333 
0334     if (ingress)
0335         priv->tc.ingress_mirred_id = 0;
0336     else
0337         priv->tc.egress_mirred_id = 0;
0338     priv->tc.offload_cnt--;
0339 
0340     return 0;
0341 }
0342 
0343 static int ocelot_setup_tc_cls_matchall(struct ocelot_port_private *priv,
0344                     struct tc_cls_matchall_offload *f,
0345                     bool ingress)
0346 {
0347     struct netlink_ext_ack *extack = f->common.extack;
0348     struct flow_action_entry *action;
0349 
0350     switch (f->command) {
0351     case TC_CLSMATCHALL_REPLACE:
0352         if (!flow_offload_has_one_action(&f->rule->action)) {
0353             NL_SET_ERR_MSG_MOD(extack,
0354                        "Only one action is supported");
0355             return -EOPNOTSUPP;
0356         }
0357 
0358         if (priv->tc.block_shared) {
0359             NL_SET_ERR_MSG_MOD(extack,
0360                        "Matchall offloads not supported on shared blocks");
0361             return -EOPNOTSUPP;
0362         }
0363 
0364         action = &f->rule->action.entries[0];
0365 
0366         switch (action->id) {
0367         case FLOW_ACTION_POLICE:
0368             return ocelot_setup_tc_cls_matchall_police(priv, f,
0369                                    ingress,
0370                                    extack);
0371             break;
0372         case FLOW_ACTION_MIRRED:
0373             return ocelot_setup_tc_cls_matchall_mirred(priv, f,
0374                                    ingress,
0375                                    extack);
0376         default:
0377             NL_SET_ERR_MSG_MOD(extack, "Unsupported action");
0378             return -EOPNOTSUPP;
0379         }
0380 
0381         break;
0382     case TC_CLSMATCHALL_DESTROY:
0383         action = &f->rule->action.entries[0];
0384 
0385         if (f->cookie == priv->tc.police_id)
0386             return ocelot_del_tc_cls_matchall_police(priv, extack);
0387         else if (f->cookie == priv->tc.ingress_mirred_id ||
0388              f->cookie == priv->tc.egress_mirred_id)
0389             return ocelot_del_tc_cls_matchall_mirred(priv, ingress,
0390                                  extack);
0391         else
0392             return -ENOENT;
0393 
0394         break;
0395     case TC_CLSMATCHALL_STATS:
0396     default:
0397         return -EOPNOTSUPP;
0398     }
0399 }
0400 
0401 static int ocelot_setup_tc_block_cb(enum tc_setup_type type,
0402                     void *type_data,
0403                     void *cb_priv, bool ingress)
0404 {
0405     struct ocelot_port_private *priv = cb_priv;
0406 
0407     if (!tc_cls_can_offload_and_chain0(priv->dev, type_data))
0408         return -EOPNOTSUPP;
0409 
0410     switch (type) {
0411     case TC_SETUP_CLSMATCHALL:
0412         return ocelot_setup_tc_cls_matchall(priv, type_data, ingress);
0413     case TC_SETUP_CLSFLOWER:
0414         return ocelot_setup_tc_cls_flower(priv, type_data, ingress);
0415     default:
0416         return -EOPNOTSUPP;
0417     }
0418 }
0419 
0420 static int ocelot_setup_tc_block_cb_ig(enum tc_setup_type type,
0421                        void *type_data,
0422                        void *cb_priv)
0423 {
0424     return ocelot_setup_tc_block_cb(type, type_data,
0425                     cb_priv, true);
0426 }
0427 
0428 static int ocelot_setup_tc_block_cb_eg(enum tc_setup_type type,
0429                        void *type_data,
0430                        void *cb_priv)
0431 {
0432     return ocelot_setup_tc_block_cb(type, type_data,
0433                     cb_priv, false);
0434 }
0435 
0436 static LIST_HEAD(ocelot_block_cb_list);
0437 
0438 static int ocelot_setup_tc_block(struct ocelot_port_private *priv,
0439                  struct flow_block_offload *f)
0440 {
0441     struct flow_block_cb *block_cb;
0442     flow_setup_cb_t *cb;
0443 
0444     if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) {
0445         cb = ocelot_setup_tc_block_cb_ig;
0446         priv->tc.block_shared = f->block_shared;
0447     } else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) {
0448         cb = ocelot_setup_tc_block_cb_eg;
0449     } else {
0450         return -EOPNOTSUPP;
0451     }
0452 
0453     f->driver_block_list = &ocelot_block_cb_list;
0454 
0455     switch (f->command) {
0456     case FLOW_BLOCK_BIND:
0457         if (flow_block_cb_is_busy(cb, priv, &ocelot_block_cb_list))
0458             return -EBUSY;
0459 
0460         block_cb = flow_block_cb_alloc(cb, priv, priv, NULL);
0461         if (IS_ERR(block_cb))
0462             return PTR_ERR(block_cb);
0463 
0464         flow_block_cb_add(block_cb, f);
0465         list_add_tail(&block_cb->driver_list, f->driver_block_list);
0466         return 0;
0467     case FLOW_BLOCK_UNBIND:
0468         block_cb = flow_block_cb_lookup(f->block, cb, priv);
0469         if (!block_cb)
0470             return -ENOENT;
0471 
0472         flow_block_cb_remove(block_cb, f);
0473         list_del(&block_cb->driver_list);
0474         return 0;
0475     default:
0476         return -EOPNOTSUPP;
0477     }
0478 }
0479 
0480 static int ocelot_setup_tc(struct net_device *dev, enum tc_setup_type type,
0481                void *type_data)
0482 {
0483     struct ocelot_port_private *priv = netdev_priv(dev);
0484 
0485     switch (type) {
0486     case TC_SETUP_BLOCK:
0487         return ocelot_setup_tc_block(priv, type_data);
0488     default:
0489         return -EOPNOTSUPP;
0490     }
0491     return 0;
0492 }
0493 
0494 static int ocelot_vlan_vid_add(struct net_device *dev, u16 vid, bool pvid,
0495                    bool untagged)
0496 {
0497     struct ocelot_port_private *priv = netdev_priv(dev);
0498     struct ocelot_port *ocelot_port = &priv->port;
0499     struct ocelot *ocelot = ocelot_port->ocelot;
0500     int port = priv->port.index;
0501     int ret;
0502 
0503     ret = ocelot_vlan_add(ocelot, port, vid, pvid, untagged);
0504     if (ret)
0505         return ret;
0506 
0507     /* Add the port MAC address to with the right VLAN information */
0508     ocelot_mact_learn(ocelot, PGID_CPU, dev->dev_addr, vid,
0509               ENTRYTYPE_LOCKED);
0510 
0511     return 0;
0512 }
0513 
0514 static int ocelot_vlan_vid_del(struct net_device *dev, u16 vid)
0515 {
0516     struct ocelot_port_private *priv = netdev_priv(dev);
0517     struct ocelot *ocelot = priv->port.ocelot;
0518     int port = priv->port.index;
0519     int ret;
0520 
0521     /* 8021q removes VID 0 on module unload for all interfaces
0522      * with VLAN filtering feature. We need to keep it to receive
0523      * untagged traffic.
0524      */
0525     if (vid == OCELOT_STANDALONE_PVID)
0526         return 0;
0527 
0528     ret = ocelot_vlan_del(ocelot, port, vid);
0529     if (ret)
0530         return ret;
0531 
0532     /* Del the port MAC address to with the right VLAN information */
0533     ocelot_mact_forget(ocelot, dev->dev_addr, vid);
0534 
0535     return 0;
0536 }
0537 
0538 static int ocelot_port_open(struct net_device *dev)
0539 {
0540     struct ocelot_port_private *priv = netdev_priv(dev);
0541 
0542     phylink_start(priv->phylink);
0543 
0544     return 0;
0545 }
0546 
0547 static int ocelot_port_stop(struct net_device *dev)
0548 {
0549     struct ocelot_port_private *priv = netdev_priv(dev);
0550 
0551     phylink_stop(priv->phylink);
0552 
0553     return 0;
0554 }
0555 
0556 static netdev_tx_t ocelot_port_xmit(struct sk_buff *skb, struct net_device *dev)
0557 {
0558     struct ocelot_port_private *priv = netdev_priv(dev);
0559     struct ocelot_port *ocelot_port = &priv->port;
0560     struct ocelot *ocelot = ocelot_port->ocelot;
0561     int port = priv->port.index;
0562     u32 rew_op = 0;
0563 
0564     if (!static_branch_unlikely(&ocelot_fdma_enabled) &&
0565         !ocelot_can_inject(ocelot, 0))
0566         return NETDEV_TX_BUSY;
0567 
0568     /* Check if timestamping is needed */
0569     if (ocelot->ptp && (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
0570         struct sk_buff *clone = NULL;
0571 
0572         if (ocelot_port_txtstamp_request(ocelot, port, skb, &clone)) {
0573             kfree_skb(skb);
0574             return NETDEV_TX_OK;
0575         }
0576 
0577         if (clone)
0578             OCELOT_SKB_CB(skb)->clone = clone;
0579 
0580         rew_op = ocelot_ptp_rew_op(skb);
0581     }
0582 
0583     if (static_branch_unlikely(&ocelot_fdma_enabled)) {
0584         ocelot_fdma_inject_frame(ocelot, port, rew_op, skb, dev);
0585     } else {
0586         ocelot_port_inject_frame(ocelot, port, 0, rew_op, skb);
0587 
0588         consume_skb(skb);
0589     }
0590 
0591     return NETDEV_TX_OK;
0592 }
0593 
0594 enum ocelot_action_type {
0595     OCELOT_MACT_LEARN,
0596     OCELOT_MACT_FORGET,
0597 };
0598 
0599 struct ocelot_mact_work_ctx {
0600     struct work_struct work;
0601     struct ocelot *ocelot;
0602     enum ocelot_action_type type;
0603     union {
0604         /* OCELOT_MACT_LEARN */
0605         struct {
0606             unsigned char addr[ETH_ALEN];
0607             u16 vid;
0608             enum macaccess_entry_type entry_type;
0609             int pgid;
0610         } learn;
0611         /* OCELOT_MACT_FORGET */
0612         struct {
0613             unsigned char addr[ETH_ALEN];
0614             u16 vid;
0615         } forget;
0616     };
0617 };
0618 
0619 #define ocelot_work_to_ctx(x) \
0620     container_of((x), struct ocelot_mact_work_ctx, work)
0621 
0622 static void ocelot_mact_work(struct work_struct *work)
0623 {
0624     struct ocelot_mact_work_ctx *w = ocelot_work_to_ctx(work);
0625     struct ocelot *ocelot = w->ocelot;
0626 
0627     switch (w->type) {
0628     case OCELOT_MACT_LEARN:
0629         ocelot_mact_learn(ocelot, w->learn.pgid, w->learn.addr,
0630                   w->learn.vid, w->learn.entry_type);
0631         break;
0632     case OCELOT_MACT_FORGET:
0633         ocelot_mact_forget(ocelot, w->forget.addr, w->forget.vid);
0634         break;
0635     default:
0636         break;
0637     }
0638 
0639     kfree(w);
0640 }
0641 
0642 static int ocelot_enqueue_mact_action(struct ocelot *ocelot,
0643                       const struct ocelot_mact_work_ctx *ctx)
0644 {
0645     struct ocelot_mact_work_ctx *w = kmemdup(ctx, sizeof(*w), GFP_ATOMIC);
0646 
0647     if (!w)
0648         return -ENOMEM;
0649 
0650     w->ocelot = ocelot;
0651     INIT_WORK(&w->work, ocelot_mact_work);
0652     queue_work(ocelot->owq, &w->work);
0653 
0654     return 0;
0655 }
0656 
0657 static int ocelot_mc_unsync(struct net_device *dev, const unsigned char *addr)
0658 {
0659     struct ocelot_port_private *priv = netdev_priv(dev);
0660     struct ocelot_port *ocelot_port = &priv->port;
0661     struct ocelot *ocelot = ocelot_port->ocelot;
0662     struct ocelot_mact_work_ctx w;
0663 
0664     ether_addr_copy(w.forget.addr, addr);
0665     w.forget.vid = OCELOT_STANDALONE_PVID;
0666     w.type = OCELOT_MACT_FORGET;
0667 
0668     return ocelot_enqueue_mact_action(ocelot, &w);
0669 }
0670 
0671 static int ocelot_mc_sync(struct net_device *dev, const unsigned char *addr)
0672 {
0673     struct ocelot_port_private *priv = netdev_priv(dev);
0674     struct ocelot_port *ocelot_port = &priv->port;
0675     struct ocelot *ocelot = ocelot_port->ocelot;
0676     struct ocelot_mact_work_ctx w;
0677 
0678     ether_addr_copy(w.learn.addr, addr);
0679     w.learn.vid = OCELOT_STANDALONE_PVID;
0680     w.learn.pgid = PGID_CPU;
0681     w.learn.entry_type = ENTRYTYPE_LOCKED;
0682     w.type = OCELOT_MACT_LEARN;
0683 
0684     return ocelot_enqueue_mact_action(ocelot, &w);
0685 }
0686 
0687 static void ocelot_set_rx_mode(struct net_device *dev)
0688 {
0689     struct ocelot_port_private *priv = netdev_priv(dev);
0690     struct ocelot *ocelot = priv->port.ocelot;
0691     u32 val;
0692     int i;
0693 
0694     /* This doesn't handle promiscuous mode because the bridge core is
0695      * setting IFF_PROMISC on all slave interfaces and all frames would be
0696      * forwarded to the CPU port.
0697      */
0698     val = GENMASK(ocelot->num_phys_ports - 1, 0);
0699     for_each_nonreserved_multicast_dest_pgid(ocelot, i)
0700         ocelot_write_rix(ocelot, val, ANA_PGID_PGID, i);
0701 
0702     __dev_mc_sync(dev, ocelot_mc_sync, ocelot_mc_unsync);
0703 }
0704 
0705 static int ocelot_port_set_mac_address(struct net_device *dev, void *p)
0706 {
0707     struct ocelot_port_private *priv = netdev_priv(dev);
0708     struct ocelot_port *ocelot_port = &priv->port;
0709     struct ocelot *ocelot = ocelot_port->ocelot;
0710     const struct sockaddr *addr = p;
0711 
0712     /* Learn the new net device MAC address in the mac table. */
0713     ocelot_mact_learn(ocelot, PGID_CPU, addr->sa_data,
0714               OCELOT_STANDALONE_PVID, ENTRYTYPE_LOCKED);
0715     /* Then forget the previous one. */
0716     ocelot_mact_forget(ocelot, dev->dev_addr, OCELOT_STANDALONE_PVID);
0717 
0718     eth_hw_addr_set(dev, addr->sa_data);
0719     return 0;
0720 }
0721 
0722 static void ocelot_get_stats64(struct net_device *dev,
0723                    struct rtnl_link_stats64 *stats)
0724 {
0725     struct ocelot_port_private *priv = netdev_priv(dev);
0726     struct ocelot *ocelot = priv->port.ocelot;
0727     int port = priv->port.index;
0728     u64 *s;
0729 
0730     spin_lock(&ocelot->stats_lock);
0731 
0732     s = &ocelot->stats[port * OCELOT_NUM_STATS];
0733 
0734     /* Get Rx stats */
0735     stats->rx_bytes = s[OCELOT_STAT_RX_OCTETS];
0736     stats->rx_packets = s[OCELOT_STAT_RX_SHORTS] +
0737                 s[OCELOT_STAT_RX_FRAGMENTS] +
0738                 s[OCELOT_STAT_RX_JABBERS] +
0739                 s[OCELOT_STAT_RX_LONGS] +
0740                 s[OCELOT_STAT_RX_64] +
0741                 s[OCELOT_STAT_RX_65_127] +
0742                 s[OCELOT_STAT_RX_128_255] +
0743                 s[OCELOT_STAT_RX_256_511] +
0744                 s[OCELOT_STAT_RX_512_1023] +
0745                 s[OCELOT_STAT_RX_1024_1526] +
0746                 s[OCELOT_STAT_RX_1527_MAX];
0747     stats->multicast = s[OCELOT_STAT_RX_MULTICAST];
0748     stats->rx_dropped = dev->stats.rx_dropped;
0749 
0750     /* Get Tx stats */
0751     stats->tx_bytes = s[OCELOT_STAT_TX_OCTETS];
0752     stats->tx_packets = s[OCELOT_STAT_TX_64] +
0753                 s[OCELOT_STAT_TX_65_127] +
0754                 s[OCELOT_STAT_TX_128_255] +
0755                 s[OCELOT_STAT_TX_256_511] +
0756                 s[OCELOT_STAT_TX_512_1023] +
0757                 s[OCELOT_STAT_TX_1024_1526] +
0758                 s[OCELOT_STAT_TX_1527_MAX];
0759     stats->tx_dropped = s[OCELOT_STAT_TX_DROPS] +
0760                 s[OCELOT_STAT_TX_AGED];
0761     stats->collisions = s[OCELOT_STAT_TX_COLLISION];
0762 
0763     spin_unlock(&ocelot->stats_lock);
0764 }
0765 
0766 static int ocelot_port_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
0767                    struct net_device *dev,
0768                    const unsigned char *addr,
0769                    u16 vid, u16 flags,
0770                    struct netlink_ext_ack *extack)
0771 {
0772     struct ocelot_port_private *priv = netdev_priv(dev);
0773     struct ocelot_port *ocelot_port = &priv->port;
0774     struct ocelot *ocelot = ocelot_port->ocelot;
0775     int port = priv->port.index;
0776 
0777     return ocelot_fdb_add(ocelot, port, addr, vid, ocelot_port->bridge);
0778 }
0779 
0780 static int ocelot_port_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
0781                    struct net_device *dev,
0782                    const unsigned char *addr, u16 vid,
0783                    struct netlink_ext_ack *extack)
0784 {
0785     struct ocelot_port_private *priv = netdev_priv(dev);
0786     struct ocelot_port *ocelot_port = &priv->port;
0787     struct ocelot *ocelot = ocelot_port->ocelot;
0788     int port = priv->port.index;
0789 
0790     return ocelot_fdb_del(ocelot, port, addr, vid, ocelot_port->bridge);
0791 }
0792 
0793 static int ocelot_port_fdb_dump(struct sk_buff *skb,
0794                 struct netlink_callback *cb,
0795                 struct net_device *dev,
0796                 struct net_device *filter_dev, int *idx)
0797 {
0798     struct ocelot_port_private *priv = netdev_priv(dev);
0799     struct ocelot *ocelot = priv->port.ocelot;
0800     struct ocelot_dump_ctx dump = {
0801         .dev = dev,
0802         .skb = skb,
0803         .cb = cb,
0804         .idx = *idx,
0805     };
0806     int port = priv->port.index;
0807     int ret;
0808 
0809     ret = ocelot_fdb_dump(ocelot, port, ocelot_port_fdb_do_dump, &dump);
0810 
0811     *idx = dump.idx;
0812 
0813     return ret;
0814 }
0815 
0816 static int ocelot_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
0817                   u16 vid)
0818 {
0819     return ocelot_vlan_vid_add(dev, vid, false, false);
0820 }
0821 
0822 static int ocelot_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
0823                    u16 vid)
0824 {
0825     return ocelot_vlan_vid_del(dev, vid);
0826 }
0827 
0828 static void ocelot_vlan_mode(struct ocelot *ocelot, int port,
0829                  netdev_features_t features)
0830 {
0831     u32 val;
0832 
0833     /* Filtering */
0834     val = ocelot_read(ocelot, ANA_VLANMASK);
0835     if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
0836         val |= BIT(port);
0837     else
0838         val &= ~BIT(port);
0839     ocelot_write(ocelot, val, ANA_VLANMASK);
0840 }
0841 
0842 static int ocelot_set_features(struct net_device *dev,
0843                    netdev_features_t features)
0844 {
0845     netdev_features_t changed = dev->features ^ features;
0846     struct ocelot_port_private *priv = netdev_priv(dev);
0847     struct ocelot *ocelot = priv->port.ocelot;
0848     int port = priv->port.index;
0849 
0850     if ((dev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC) &&
0851         priv->tc.offload_cnt) {
0852         netdev_err(dev,
0853                "Cannot disable HW TC offload while offloads active\n");
0854         return -EBUSY;
0855     }
0856 
0857     if (changed & NETIF_F_HW_VLAN_CTAG_FILTER)
0858         ocelot_vlan_mode(ocelot, port, features);
0859 
0860     return 0;
0861 }
0862 
0863 static int ocelot_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
0864 {
0865     struct ocelot_port_private *priv = netdev_priv(dev);
0866     struct ocelot *ocelot = priv->port.ocelot;
0867     int port = priv->port.index;
0868 
0869     /* If the attached PHY device isn't capable of timestamping operations,
0870      * use our own (when possible).
0871      */
0872     if (!phy_has_hwtstamp(dev->phydev) && ocelot->ptp) {
0873         switch (cmd) {
0874         case SIOCSHWTSTAMP:
0875             return ocelot_hwstamp_set(ocelot, port, ifr);
0876         case SIOCGHWTSTAMP:
0877             return ocelot_hwstamp_get(ocelot, port, ifr);
0878         }
0879     }
0880 
0881     return phy_mii_ioctl(dev->phydev, ifr, cmd);
0882 }
0883 
0884 static int ocelot_change_mtu(struct net_device *dev, int new_mtu)
0885 {
0886     struct ocelot_port_private *priv = netdev_priv(dev);
0887     struct ocelot_port *ocelot_port = &priv->port;
0888     struct ocelot *ocelot = ocelot_port->ocelot;
0889 
0890     ocelot_port_set_maxlen(ocelot, priv->port.index, new_mtu);
0891     WRITE_ONCE(dev->mtu, new_mtu);
0892 
0893     return 0;
0894 }
0895 
0896 static const struct net_device_ops ocelot_port_netdev_ops = {
0897     .ndo_open           = ocelot_port_open,
0898     .ndo_stop           = ocelot_port_stop,
0899     .ndo_start_xmit         = ocelot_port_xmit,
0900     .ndo_change_mtu         = ocelot_change_mtu,
0901     .ndo_set_rx_mode        = ocelot_set_rx_mode,
0902     .ndo_set_mac_address        = ocelot_port_set_mac_address,
0903     .ndo_get_stats64        = ocelot_get_stats64,
0904     .ndo_fdb_add            = ocelot_port_fdb_add,
0905     .ndo_fdb_del            = ocelot_port_fdb_del,
0906     .ndo_fdb_dump           = ocelot_port_fdb_dump,
0907     .ndo_vlan_rx_add_vid        = ocelot_vlan_rx_add_vid,
0908     .ndo_vlan_rx_kill_vid       = ocelot_vlan_rx_kill_vid,
0909     .ndo_set_features       = ocelot_set_features,
0910     .ndo_setup_tc           = ocelot_setup_tc,
0911     .ndo_eth_ioctl          = ocelot_ioctl,
0912     .ndo_get_devlink_port       = ocelot_get_devlink_port,
0913 };
0914 
0915 struct net_device *ocelot_port_to_netdev(struct ocelot *ocelot, int port)
0916 {
0917     struct ocelot_port *ocelot_port = ocelot->ports[port];
0918     struct ocelot_port_private *priv;
0919 
0920     if (!ocelot_port)
0921         return NULL;
0922 
0923     priv = container_of(ocelot_port, struct ocelot_port_private, port);
0924 
0925     return priv->dev;
0926 }
0927 
0928 /* Checks if the net_device instance given to us originates from our driver */
0929 static bool ocelot_netdevice_dev_check(const struct net_device *dev)
0930 {
0931     return dev->netdev_ops == &ocelot_port_netdev_ops;
0932 }
0933 
0934 int ocelot_netdev_to_port(struct net_device *dev)
0935 {
0936     struct ocelot_port_private *priv;
0937 
0938     if (!dev || !ocelot_netdevice_dev_check(dev))
0939         return -EINVAL;
0940 
0941     priv = netdev_priv(dev);
0942 
0943     return priv->port.index;
0944 }
0945 
0946 static void ocelot_port_get_strings(struct net_device *netdev, u32 sset,
0947                     u8 *data)
0948 {
0949     struct ocelot_port_private *priv = netdev_priv(netdev);
0950     struct ocelot *ocelot = priv->port.ocelot;
0951     int port = priv->port.index;
0952 
0953     ocelot_get_strings(ocelot, port, sset, data);
0954 }
0955 
0956 static void ocelot_port_get_ethtool_stats(struct net_device *dev,
0957                       struct ethtool_stats *stats,
0958                       u64 *data)
0959 {
0960     struct ocelot_port_private *priv = netdev_priv(dev);
0961     struct ocelot *ocelot = priv->port.ocelot;
0962     int port = priv->port.index;
0963 
0964     ocelot_get_ethtool_stats(ocelot, port, data);
0965 }
0966 
0967 static int ocelot_port_get_sset_count(struct net_device *dev, int sset)
0968 {
0969     struct ocelot_port_private *priv = netdev_priv(dev);
0970     struct ocelot *ocelot = priv->port.ocelot;
0971     int port = priv->port.index;
0972 
0973     return ocelot_get_sset_count(ocelot, port, sset);
0974 }
0975 
0976 static int ocelot_port_get_ts_info(struct net_device *dev,
0977                    struct ethtool_ts_info *info)
0978 {
0979     struct ocelot_port_private *priv = netdev_priv(dev);
0980     struct ocelot *ocelot = priv->port.ocelot;
0981     int port = priv->port.index;
0982 
0983     if (!ocelot->ptp)
0984         return ethtool_op_get_ts_info(dev, info);
0985 
0986     return ocelot_get_ts_info(ocelot, port, info);
0987 }
0988 
0989 static const struct ethtool_ops ocelot_ethtool_ops = {
0990     .get_strings        = ocelot_port_get_strings,
0991     .get_ethtool_stats  = ocelot_port_get_ethtool_stats,
0992     .get_sset_count     = ocelot_port_get_sset_count,
0993     .get_link_ksettings = phy_ethtool_get_link_ksettings,
0994     .set_link_ksettings = phy_ethtool_set_link_ksettings,
0995     .get_ts_info        = ocelot_port_get_ts_info,
0996 };
0997 
0998 static void ocelot_port_attr_stp_state_set(struct ocelot *ocelot, int port,
0999                        u8 state)
1000 {
1001     ocelot_bridge_stp_state_set(ocelot, port, state);
1002 }
1003 
1004 static void ocelot_port_attr_ageing_set(struct ocelot *ocelot, int port,
1005                     unsigned long ageing_clock_t)
1006 {
1007     unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock_t);
1008     u32 ageing_time = jiffies_to_msecs(ageing_jiffies);
1009 
1010     ocelot_set_ageing_time(ocelot, ageing_time);
1011 }
1012 
1013 static void ocelot_port_attr_mc_set(struct ocelot *ocelot, int port, bool mc)
1014 {
1015     u32 cpu_fwd_mcast = ANA_PORT_CPU_FWD_CFG_CPU_IGMP_REDIR_ENA |
1016                 ANA_PORT_CPU_FWD_CFG_CPU_MLD_REDIR_ENA |
1017                 ANA_PORT_CPU_FWD_CFG_CPU_IPMC_CTRL_COPY_ENA;
1018     u32 val = 0;
1019 
1020     if (mc)
1021         val = cpu_fwd_mcast;
1022 
1023     ocelot_rmw_gix(ocelot, val, cpu_fwd_mcast,
1024                ANA_PORT_CPU_FWD_CFG, port);
1025 }
1026 
1027 static int ocelot_port_attr_set(struct net_device *dev, const void *ctx,
1028                 const struct switchdev_attr *attr,
1029                 struct netlink_ext_ack *extack)
1030 {
1031     struct ocelot_port_private *priv = netdev_priv(dev);
1032     struct ocelot *ocelot = priv->port.ocelot;
1033     int port = priv->port.index;
1034     int err = 0;
1035 
1036     if (ctx && ctx != priv)
1037         return 0;
1038 
1039     switch (attr->id) {
1040     case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
1041         ocelot_port_attr_stp_state_set(ocelot, port, attr->u.stp_state);
1042         break;
1043     case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
1044         ocelot_port_attr_ageing_set(ocelot, port, attr->u.ageing_time);
1045         break;
1046     case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
1047         ocelot_port_vlan_filtering(ocelot, port, attr->u.vlan_filtering,
1048                        extack);
1049         break;
1050     case SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED:
1051         ocelot_port_attr_mc_set(ocelot, port, !attr->u.mc_disabled);
1052         break;
1053     case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
1054         err = ocelot_port_pre_bridge_flags(ocelot, port,
1055                            attr->u.brport_flags);
1056         break;
1057     case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
1058         ocelot_port_bridge_flags(ocelot, port, attr->u.brport_flags);
1059         break;
1060     default:
1061         err = -EOPNOTSUPP;
1062         break;
1063     }
1064 
1065     return err;
1066 }
1067 
1068 static int ocelot_vlan_vid_prepare(struct net_device *dev, u16 vid, bool pvid,
1069                    bool untagged, struct netlink_ext_ack *extack)
1070 {
1071     struct ocelot_port_private *priv = netdev_priv(dev);
1072     struct ocelot_port *ocelot_port = &priv->port;
1073     struct ocelot *ocelot = ocelot_port->ocelot;
1074     int port = priv->port.index;
1075 
1076     return ocelot_vlan_prepare(ocelot, port, vid, pvid, untagged, extack);
1077 }
1078 
1079 static int ocelot_port_obj_add_vlan(struct net_device *dev,
1080                     const struct switchdev_obj_port_vlan *vlan,
1081                     struct netlink_ext_ack *extack)
1082 {
1083     bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
1084     bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
1085     int ret;
1086 
1087     ret = ocelot_vlan_vid_prepare(dev, vlan->vid, pvid, untagged, extack);
1088     if (ret)
1089         return ret;
1090 
1091     return ocelot_vlan_vid_add(dev, vlan->vid, pvid, untagged);
1092 }
1093 
1094 static int ocelot_port_obj_add_mdb(struct net_device *dev,
1095                    const struct switchdev_obj_port_mdb *mdb)
1096 {
1097     struct ocelot_port_private *priv = netdev_priv(dev);
1098     struct ocelot_port *ocelot_port = &priv->port;
1099     struct ocelot *ocelot = ocelot_port->ocelot;
1100     int port = priv->port.index;
1101 
1102     return ocelot_port_mdb_add(ocelot, port, mdb, ocelot_port->bridge);
1103 }
1104 
1105 static int ocelot_port_obj_del_mdb(struct net_device *dev,
1106                    const struct switchdev_obj_port_mdb *mdb)
1107 {
1108     struct ocelot_port_private *priv = netdev_priv(dev);
1109     struct ocelot_port *ocelot_port = &priv->port;
1110     struct ocelot *ocelot = ocelot_port->ocelot;
1111     int port = priv->port.index;
1112 
1113     return ocelot_port_mdb_del(ocelot, port, mdb, ocelot_port->bridge);
1114 }
1115 
1116 static int ocelot_port_obj_mrp_add(struct net_device *dev,
1117                    const struct switchdev_obj_mrp *mrp)
1118 {
1119     struct ocelot_port_private *priv = netdev_priv(dev);
1120     struct ocelot_port *ocelot_port = &priv->port;
1121     struct ocelot *ocelot = ocelot_port->ocelot;
1122     int port = priv->port.index;
1123 
1124     return ocelot_mrp_add(ocelot, port, mrp);
1125 }
1126 
1127 static int ocelot_port_obj_mrp_del(struct net_device *dev,
1128                    const struct switchdev_obj_mrp *mrp)
1129 {
1130     struct ocelot_port_private *priv = netdev_priv(dev);
1131     struct ocelot_port *ocelot_port = &priv->port;
1132     struct ocelot *ocelot = ocelot_port->ocelot;
1133     int port = priv->port.index;
1134 
1135     return ocelot_mrp_del(ocelot, port, mrp);
1136 }
1137 
1138 static int
1139 ocelot_port_obj_mrp_add_ring_role(struct net_device *dev,
1140                   const struct switchdev_obj_ring_role_mrp *mrp)
1141 {
1142     struct ocelot_port_private *priv = netdev_priv(dev);
1143     struct ocelot_port *ocelot_port = &priv->port;
1144     struct ocelot *ocelot = ocelot_port->ocelot;
1145     int port = priv->port.index;
1146 
1147     return ocelot_mrp_add_ring_role(ocelot, port, mrp);
1148 }
1149 
1150 static int
1151 ocelot_port_obj_mrp_del_ring_role(struct net_device *dev,
1152                   const struct switchdev_obj_ring_role_mrp *mrp)
1153 {
1154     struct ocelot_port_private *priv = netdev_priv(dev);
1155     struct ocelot_port *ocelot_port = &priv->port;
1156     struct ocelot *ocelot = ocelot_port->ocelot;
1157     int port = priv->port.index;
1158 
1159     return ocelot_mrp_del_ring_role(ocelot, port, mrp);
1160 }
1161 
1162 static int ocelot_port_obj_add(struct net_device *dev, const void *ctx,
1163                    const struct switchdev_obj *obj,
1164                    struct netlink_ext_ack *extack)
1165 {
1166     struct ocelot_port_private *priv = netdev_priv(dev);
1167     int ret = 0;
1168 
1169     if (ctx && ctx != priv)
1170         return 0;
1171 
1172     switch (obj->id) {
1173     case SWITCHDEV_OBJ_ID_PORT_VLAN:
1174         ret = ocelot_port_obj_add_vlan(dev,
1175                            SWITCHDEV_OBJ_PORT_VLAN(obj),
1176                            extack);
1177         break;
1178     case SWITCHDEV_OBJ_ID_PORT_MDB:
1179         ret = ocelot_port_obj_add_mdb(dev, SWITCHDEV_OBJ_PORT_MDB(obj));
1180         break;
1181     case SWITCHDEV_OBJ_ID_MRP:
1182         ret = ocelot_port_obj_mrp_add(dev, SWITCHDEV_OBJ_MRP(obj));
1183         break;
1184     case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
1185         ret = ocelot_port_obj_mrp_add_ring_role(dev,
1186                             SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
1187         break;
1188     default:
1189         return -EOPNOTSUPP;
1190     }
1191 
1192     return ret;
1193 }
1194 
1195 static int ocelot_port_obj_del(struct net_device *dev, const void *ctx,
1196                    const struct switchdev_obj *obj)
1197 {
1198     struct ocelot_port_private *priv = netdev_priv(dev);
1199     int ret = 0;
1200 
1201     if (ctx && ctx != priv)
1202         return 0;
1203 
1204     switch (obj->id) {
1205     case SWITCHDEV_OBJ_ID_PORT_VLAN:
1206         ret = ocelot_vlan_vid_del(dev,
1207                       SWITCHDEV_OBJ_PORT_VLAN(obj)->vid);
1208         break;
1209     case SWITCHDEV_OBJ_ID_PORT_MDB:
1210         ret = ocelot_port_obj_del_mdb(dev, SWITCHDEV_OBJ_PORT_MDB(obj));
1211         break;
1212     case SWITCHDEV_OBJ_ID_MRP:
1213         ret = ocelot_port_obj_mrp_del(dev, SWITCHDEV_OBJ_MRP(obj));
1214         break;
1215     case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
1216         ret = ocelot_port_obj_mrp_del_ring_role(dev,
1217                             SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
1218         break;
1219     default:
1220         return -EOPNOTSUPP;
1221     }
1222 
1223     return ret;
1224 }
1225 
1226 static void ocelot_inherit_brport_flags(struct ocelot *ocelot, int port,
1227                     struct net_device *brport_dev)
1228 {
1229     struct switchdev_brport_flags flags = {0};
1230     int flag;
1231 
1232     flags.mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;
1233 
1234     for_each_set_bit(flag, &flags.mask, 32)
1235         if (br_port_flag_is_set(brport_dev, BIT(flag)))
1236             flags.val |= BIT(flag);
1237 
1238     ocelot_port_bridge_flags(ocelot, port, flags);
1239 }
1240 
1241 static void ocelot_clear_brport_flags(struct ocelot *ocelot, int port)
1242 {
1243     struct switchdev_brport_flags flags;
1244 
1245     flags.mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;
1246     flags.val = flags.mask & ~BR_LEARNING;
1247 
1248     ocelot_port_bridge_flags(ocelot, port, flags);
1249 }
1250 
1251 static int ocelot_switchdev_sync(struct ocelot *ocelot, int port,
1252                  struct net_device *brport_dev,
1253                  struct net_device *bridge_dev,
1254                  struct netlink_ext_ack *extack)
1255 {
1256     clock_t ageing_time;
1257     u8 stp_state;
1258 
1259     ocelot_inherit_brport_flags(ocelot, port, brport_dev);
1260 
1261     stp_state = br_port_get_stp_state(brport_dev);
1262     ocelot_bridge_stp_state_set(ocelot, port, stp_state);
1263 
1264     ageing_time = br_get_ageing_time(bridge_dev);
1265     ocelot_port_attr_ageing_set(ocelot, port, ageing_time);
1266 
1267     return ocelot_port_vlan_filtering(ocelot, port,
1268                       br_vlan_enabled(bridge_dev),
1269                       extack);
1270 }
1271 
1272 static int ocelot_switchdev_unsync(struct ocelot *ocelot, int port)
1273 {
1274     int err;
1275 
1276     err = ocelot_port_vlan_filtering(ocelot, port, false, NULL);
1277     if (err)
1278         return err;
1279 
1280     ocelot_clear_brport_flags(ocelot, port);
1281 
1282     ocelot_bridge_stp_state_set(ocelot, port, BR_STATE_FORWARDING);
1283 
1284     return 0;
1285 }
1286 
1287 static int ocelot_bridge_num_get(struct ocelot *ocelot,
1288                  const struct net_device *bridge_dev)
1289 {
1290     int bridge_num = ocelot_bridge_num_find(ocelot, bridge_dev);
1291 
1292     if (bridge_num < 0) {
1293         /* First port that offloads this bridge */
1294         bridge_num = find_first_zero_bit(&ocelot->bridges,
1295                          ocelot->num_phys_ports);
1296 
1297         set_bit(bridge_num, &ocelot->bridges);
1298     }
1299 
1300     return bridge_num;
1301 }
1302 
1303 static void ocelot_bridge_num_put(struct ocelot *ocelot,
1304                   const struct net_device *bridge_dev,
1305                   int bridge_num)
1306 {
1307     /* Check if the bridge is still in use, otherwise it is time
1308      * to clean it up so we can reuse this bridge_num later.
1309      */
1310     if (!ocelot_bridge_num_find(ocelot, bridge_dev))
1311         clear_bit(bridge_num, &ocelot->bridges);
1312 }
1313 
1314 static int ocelot_netdevice_bridge_join(struct net_device *dev,
1315                     struct net_device *brport_dev,
1316                     struct net_device *bridge,
1317                     struct netlink_ext_ack *extack)
1318 {
1319     struct ocelot_port_private *priv = netdev_priv(dev);
1320     struct ocelot_port *ocelot_port = &priv->port;
1321     struct ocelot *ocelot = ocelot_port->ocelot;
1322     int port = priv->port.index;
1323     int bridge_num, err;
1324 
1325     bridge_num = ocelot_bridge_num_get(ocelot, bridge);
1326 
1327     err = ocelot_port_bridge_join(ocelot, port, bridge, bridge_num,
1328                       extack);
1329     if (err)
1330         goto err_join;
1331 
1332     err = switchdev_bridge_port_offload(brport_dev, dev, priv,
1333                         &ocelot_switchdev_nb,
1334                         &ocelot_switchdev_blocking_nb,
1335                         false, extack);
1336     if (err)
1337         goto err_switchdev_offload;
1338 
1339     err = ocelot_switchdev_sync(ocelot, port, brport_dev, bridge, extack);
1340     if (err)
1341         goto err_switchdev_sync;
1342 
1343     return 0;
1344 
1345 err_switchdev_sync:
1346     switchdev_bridge_port_unoffload(brport_dev, priv,
1347                     &ocelot_switchdev_nb,
1348                     &ocelot_switchdev_blocking_nb);
1349 err_switchdev_offload:
1350     ocelot_port_bridge_leave(ocelot, port, bridge);
1351 err_join:
1352     ocelot_bridge_num_put(ocelot, bridge, bridge_num);
1353     return err;
1354 }
1355 
1356 static void ocelot_netdevice_pre_bridge_leave(struct net_device *dev,
1357                           struct net_device *brport_dev)
1358 {
1359     struct ocelot_port_private *priv = netdev_priv(dev);
1360 
1361     switchdev_bridge_port_unoffload(brport_dev, priv,
1362                     &ocelot_switchdev_nb,
1363                     &ocelot_switchdev_blocking_nb);
1364 }
1365 
1366 static int ocelot_netdevice_bridge_leave(struct net_device *dev,
1367                      struct net_device *brport_dev,
1368                      struct net_device *bridge)
1369 {
1370     struct ocelot_port_private *priv = netdev_priv(dev);
1371     struct ocelot_port *ocelot_port = &priv->port;
1372     struct ocelot *ocelot = ocelot_port->ocelot;
1373     int bridge_num = ocelot_port->bridge_num;
1374     int port = priv->port.index;
1375     int err;
1376 
1377     err = ocelot_switchdev_unsync(ocelot, port);
1378     if (err)
1379         return err;
1380 
1381     ocelot_port_bridge_leave(ocelot, port, bridge);
1382     ocelot_bridge_num_put(ocelot, bridge, bridge_num);
1383 
1384     return 0;
1385 }
1386 
1387 static int ocelot_netdevice_lag_join(struct net_device *dev,
1388                      struct net_device *bond,
1389                      struct netdev_lag_upper_info *info,
1390                      struct netlink_ext_ack *extack)
1391 {
1392     struct ocelot_port_private *priv = netdev_priv(dev);
1393     struct ocelot_port *ocelot_port = &priv->port;
1394     struct ocelot *ocelot = ocelot_port->ocelot;
1395     struct net_device *bridge_dev;
1396     int port = priv->port.index;
1397     int err;
1398 
1399     err = ocelot_port_lag_join(ocelot, port, bond, info);
1400     if (err == -EOPNOTSUPP) {
1401         NL_SET_ERR_MSG_MOD(extack, "Offloading not supported");
1402         return 0;
1403     }
1404 
1405     bridge_dev = netdev_master_upper_dev_get(bond);
1406     if (!bridge_dev || !netif_is_bridge_master(bridge_dev))
1407         return 0;
1408 
1409     err = ocelot_netdevice_bridge_join(dev, bond, bridge_dev, extack);
1410     if (err)
1411         goto err_bridge_join;
1412 
1413     return 0;
1414 
1415 err_bridge_join:
1416     ocelot_port_lag_leave(ocelot, port, bond);
1417     return err;
1418 }
1419 
1420 static void ocelot_netdevice_pre_lag_leave(struct net_device *dev,
1421                        struct net_device *bond)
1422 {
1423     struct net_device *bridge_dev;
1424 
1425     bridge_dev = netdev_master_upper_dev_get(bond);
1426     if (!bridge_dev || !netif_is_bridge_master(bridge_dev))
1427         return;
1428 
1429     ocelot_netdevice_pre_bridge_leave(dev, bond);
1430 }
1431 
1432 static int ocelot_netdevice_lag_leave(struct net_device *dev,
1433                       struct net_device *bond)
1434 {
1435     struct ocelot_port_private *priv = netdev_priv(dev);
1436     struct ocelot_port *ocelot_port = &priv->port;
1437     struct ocelot *ocelot = ocelot_port->ocelot;
1438     struct net_device *bridge_dev;
1439     int port = priv->port.index;
1440 
1441     ocelot_port_lag_leave(ocelot, port, bond);
1442 
1443     bridge_dev = netdev_master_upper_dev_get(bond);
1444     if (!bridge_dev || !netif_is_bridge_master(bridge_dev))
1445         return 0;
1446 
1447     return ocelot_netdevice_bridge_leave(dev, bond, bridge_dev);
1448 }
1449 
1450 static int ocelot_netdevice_changeupper(struct net_device *dev,
1451                     struct net_device *brport_dev,
1452                     struct netdev_notifier_changeupper_info *info)
1453 {
1454     struct netlink_ext_ack *extack;
1455     int err = 0;
1456 
1457     extack = netdev_notifier_info_to_extack(&info->info);
1458 
1459     if (netif_is_bridge_master(info->upper_dev)) {
1460         if (info->linking)
1461             err = ocelot_netdevice_bridge_join(dev, brport_dev,
1462                                info->upper_dev,
1463                                extack);
1464         else
1465             err = ocelot_netdevice_bridge_leave(dev, brport_dev,
1466                                 info->upper_dev);
1467     }
1468     if (netif_is_lag_master(info->upper_dev)) {
1469         if (info->linking)
1470             err = ocelot_netdevice_lag_join(dev, info->upper_dev,
1471                             info->upper_info, extack);
1472         else
1473             ocelot_netdevice_lag_leave(dev, info->upper_dev);
1474     }
1475 
1476     return notifier_from_errno(err);
1477 }
1478 
1479 /* Treat CHANGEUPPER events on an offloaded LAG as individual CHANGEUPPER
1480  * events for the lower physical ports of the LAG.
1481  * If the LAG upper isn't offloaded, ignore its CHANGEUPPER events.
1482  * In case the LAG joined a bridge, notify that we are offloading it and can do
1483  * forwarding in hardware towards it.
1484  */
1485 static int
1486 ocelot_netdevice_lag_changeupper(struct net_device *dev,
1487                  struct netdev_notifier_changeupper_info *info)
1488 {
1489     struct net_device *lower;
1490     struct list_head *iter;
1491     int err = NOTIFY_DONE;
1492 
1493     netdev_for_each_lower_dev(dev, lower, iter) {
1494         struct ocelot_port_private *priv = netdev_priv(lower);
1495         struct ocelot_port *ocelot_port = &priv->port;
1496 
1497         if (ocelot_port->bond != dev)
1498             return NOTIFY_OK;
1499 
1500         err = ocelot_netdevice_changeupper(lower, dev, info);
1501         if (err)
1502             return notifier_from_errno(err);
1503     }
1504 
1505     return NOTIFY_DONE;
1506 }
1507 
1508 static int
1509 ocelot_netdevice_prechangeupper(struct net_device *dev,
1510                 struct net_device *brport_dev,
1511                 struct netdev_notifier_changeupper_info *info)
1512 {
1513     if (netif_is_bridge_master(info->upper_dev) && !info->linking)
1514         ocelot_netdevice_pre_bridge_leave(dev, brport_dev);
1515 
1516     if (netif_is_lag_master(info->upper_dev) && !info->linking)
1517         ocelot_netdevice_pre_lag_leave(dev, info->upper_dev);
1518 
1519     return NOTIFY_DONE;
1520 }
1521 
1522 static int
1523 ocelot_netdevice_lag_prechangeupper(struct net_device *dev,
1524                     struct netdev_notifier_changeupper_info *info)
1525 {
1526     struct net_device *lower;
1527     struct list_head *iter;
1528     int err = NOTIFY_DONE;
1529 
1530     netdev_for_each_lower_dev(dev, lower, iter) {
1531         struct ocelot_port_private *priv = netdev_priv(lower);
1532         struct ocelot_port *ocelot_port = &priv->port;
1533 
1534         if (ocelot_port->bond != dev)
1535             return NOTIFY_OK;
1536 
1537         err = ocelot_netdevice_prechangeupper(dev, lower, info);
1538         if (err)
1539             return err;
1540     }
1541 
1542     return NOTIFY_DONE;
1543 }
1544 
1545 static int
1546 ocelot_netdevice_changelowerstate(struct net_device *dev,
1547                   struct netdev_lag_lower_state_info *info)
1548 {
1549     struct ocelot_port_private *priv = netdev_priv(dev);
1550     bool is_active = info->link_up && info->tx_enabled;
1551     struct ocelot_port *ocelot_port = &priv->port;
1552     struct ocelot *ocelot = ocelot_port->ocelot;
1553     int port = priv->port.index;
1554 
1555     if (!ocelot_port->bond)
1556         return NOTIFY_DONE;
1557 
1558     if (ocelot_port->lag_tx_active == is_active)
1559         return NOTIFY_DONE;
1560 
1561     ocelot_port_lag_change(ocelot, port, is_active);
1562 
1563     return NOTIFY_OK;
1564 }
1565 
1566 static int ocelot_netdevice_event(struct notifier_block *unused,
1567                   unsigned long event, void *ptr)
1568 {
1569     struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1570 
1571     switch (event) {
1572     case NETDEV_PRECHANGEUPPER: {
1573         struct netdev_notifier_changeupper_info *info = ptr;
1574 
1575         if (ocelot_netdevice_dev_check(dev))
1576             return ocelot_netdevice_prechangeupper(dev, dev, info);
1577 
1578         if (netif_is_lag_master(dev))
1579             return ocelot_netdevice_lag_prechangeupper(dev, info);
1580 
1581         break;
1582     }
1583     case NETDEV_CHANGEUPPER: {
1584         struct netdev_notifier_changeupper_info *info = ptr;
1585 
1586         if (ocelot_netdevice_dev_check(dev))
1587             return ocelot_netdevice_changeupper(dev, dev, info);
1588 
1589         if (netif_is_lag_master(dev))
1590             return ocelot_netdevice_lag_changeupper(dev, info);
1591 
1592         break;
1593     }
1594     case NETDEV_CHANGELOWERSTATE: {
1595         struct netdev_notifier_changelowerstate_info *info = ptr;
1596 
1597         if (!ocelot_netdevice_dev_check(dev))
1598             break;
1599 
1600         return ocelot_netdevice_changelowerstate(dev,
1601                              info->lower_state_info);
1602     }
1603     default:
1604         break;
1605     }
1606 
1607     return NOTIFY_DONE;
1608 }
1609 
1610 struct notifier_block ocelot_netdevice_nb __read_mostly = {
1611     .notifier_call = ocelot_netdevice_event,
1612 };
1613 
1614 static int ocelot_switchdev_event(struct notifier_block *unused,
1615                   unsigned long event, void *ptr)
1616 {
1617     struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
1618     int err;
1619 
1620     switch (event) {
1621     case SWITCHDEV_PORT_ATTR_SET:
1622         err = switchdev_handle_port_attr_set(dev, ptr,
1623                              ocelot_netdevice_dev_check,
1624                              ocelot_port_attr_set);
1625         return notifier_from_errno(err);
1626     }
1627 
1628     return NOTIFY_DONE;
1629 }
1630 
1631 struct notifier_block ocelot_switchdev_nb __read_mostly = {
1632     .notifier_call = ocelot_switchdev_event,
1633 };
1634 
1635 static int ocelot_switchdev_blocking_event(struct notifier_block *unused,
1636                        unsigned long event, void *ptr)
1637 {
1638     struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
1639     int err;
1640 
1641     switch (event) {
1642         /* Blocking events. */
1643     case SWITCHDEV_PORT_OBJ_ADD:
1644         err = switchdev_handle_port_obj_add(dev, ptr,
1645                             ocelot_netdevice_dev_check,
1646                             ocelot_port_obj_add);
1647         return notifier_from_errno(err);
1648     case SWITCHDEV_PORT_OBJ_DEL:
1649         err = switchdev_handle_port_obj_del(dev, ptr,
1650                             ocelot_netdevice_dev_check,
1651                             ocelot_port_obj_del);
1652         return notifier_from_errno(err);
1653     case SWITCHDEV_PORT_ATTR_SET:
1654         err = switchdev_handle_port_attr_set(dev, ptr,
1655                              ocelot_netdevice_dev_check,
1656                              ocelot_port_attr_set);
1657         return notifier_from_errno(err);
1658     }
1659 
1660     return NOTIFY_DONE;
1661 }
1662 
1663 struct notifier_block ocelot_switchdev_blocking_nb __read_mostly = {
1664     .notifier_call = ocelot_switchdev_blocking_event,
1665 };
1666 
1667 static void vsc7514_phylink_mac_config(struct phylink_config *config,
1668                        unsigned int link_an_mode,
1669                        const struct phylink_link_state *state)
1670 {
1671     struct net_device *ndev = to_net_dev(config->dev);
1672     struct ocelot_port_private *priv = netdev_priv(ndev);
1673     struct ocelot_port *ocelot_port = &priv->port;
1674 
1675     /* Disable HDX fast control */
1676     ocelot_port_writel(ocelot_port, DEV_PORT_MISC_HDX_FAST_DIS,
1677                DEV_PORT_MISC);
1678 
1679     /* SGMII only for now */
1680     ocelot_port_writel(ocelot_port, PCS1G_MODE_CFG_SGMII_MODE_ENA,
1681                PCS1G_MODE_CFG);
1682     ocelot_port_writel(ocelot_port, PCS1G_SD_CFG_SD_SEL, PCS1G_SD_CFG);
1683 
1684     /* Enable PCS */
1685     ocelot_port_writel(ocelot_port, PCS1G_CFG_PCS_ENA, PCS1G_CFG);
1686 
1687     /* No aneg on SGMII */
1688     ocelot_port_writel(ocelot_port, 0, PCS1G_ANEG_CFG);
1689 
1690     /* No loopback */
1691     ocelot_port_writel(ocelot_port, 0, PCS1G_LB_CFG);
1692 }
1693 
1694 static void vsc7514_phylink_mac_link_down(struct phylink_config *config,
1695                       unsigned int link_an_mode,
1696                       phy_interface_t interface)
1697 {
1698     struct net_device *ndev = to_net_dev(config->dev);
1699     struct ocelot_port_private *priv = netdev_priv(ndev);
1700     struct ocelot *ocelot = priv->port.ocelot;
1701     int port = priv->port.index;
1702 
1703     ocelot_phylink_mac_link_down(ocelot, port, link_an_mode, interface,
1704                      OCELOT_MAC_QUIRKS);
1705 }
1706 
1707 static void vsc7514_phylink_mac_link_up(struct phylink_config *config,
1708                     struct phy_device *phydev,
1709                     unsigned int link_an_mode,
1710                     phy_interface_t interface,
1711                     int speed, int duplex,
1712                     bool tx_pause, bool rx_pause)
1713 {
1714     struct net_device *ndev = to_net_dev(config->dev);
1715     struct ocelot_port_private *priv = netdev_priv(ndev);
1716     struct ocelot *ocelot = priv->port.ocelot;
1717     int port = priv->port.index;
1718 
1719     ocelot_phylink_mac_link_up(ocelot, port, phydev, link_an_mode,
1720                    interface, speed, duplex,
1721                    tx_pause, rx_pause, OCELOT_MAC_QUIRKS);
1722 }
1723 
1724 static const struct phylink_mac_ops ocelot_phylink_ops = {
1725     .validate       = phylink_generic_validate,
1726     .mac_config     = vsc7514_phylink_mac_config,
1727     .mac_link_down      = vsc7514_phylink_mac_link_down,
1728     .mac_link_up        = vsc7514_phylink_mac_link_up,
1729 };
1730 
1731 static int ocelot_port_phylink_create(struct ocelot *ocelot, int port,
1732                       struct device_node *portnp)
1733 {
1734     struct ocelot_port *ocelot_port = ocelot->ports[port];
1735     struct ocelot_port_private *priv;
1736     struct device *dev = ocelot->dev;
1737     phy_interface_t phy_mode;
1738     struct phylink *phylink;
1739     int err;
1740 
1741     of_get_phy_mode(portnp, &phy_mode);
1742     /* DT bindings of internal PHY ports are broken and don't
1743      * specify a phy-mode
1744      */
1745     if (phy_mode == PHY_INTERFACE_MODE_NA)
1746         phy_mode = PHY_INTERFACE_MODE_INTERNAL;
1747 
1748     if (phy_mode != PHY_INTERFACE_MODE_SGMII &&
1749         phy_mode != PHY_INTERFACE_MODE_QSGMII &&
1750         phy_mode != PHY_INTERFACE_MODE_INTERNAL) {
1751         dev_err(dev, "unsupported phy mode %s for port %d\n",
1752             phy_modes(phy_mode), port);
1753         return -EINVAL;
1754     }
1755 
1756     /* Ensure clock signals and speed are set on all QSGMII links */
1757     if (phy_mode == PHY_INTERFACE_MODE_QSGMII)
1758         ocelot_port_rmwl(ocelot_port, 0,
1759                  DEV_CLOCK_CFG_MAC_TX_RST |
1760                  DEV_CLOCK_CFG_MAC_RX_RST,
1761                  DEV_CLOCK_CFG);
1762 
1763     ocelot_port->phy_mode = phy_mode;
1764 
1765     if (phy_mode != PHY_INTERFACE_MODE_INTERNAL) {
1766         struct phy *serdes = of_phy_get(portnp, NULL);
1767 
1768         if (IS_ERR(serdes)) {
1769             err = PTR_ERR(serdes);
1770             dev_err_probe(dev, err,
1771                       "missing SerDes phys for port %d\n",
1772                       port);
1773             return err;
1774         }
1775 
1776         err = phy_set_mode_ext(serdes, PHY_MODE_ETHERNET, phy_mode);
1777         of_phy_put(serdes);
1778         if (err) {
1779             dev_err(dev, "Could not SerDes mode on port %d: %pe\n",
1780                 port, ERR_PTR(err));
1781             return err;
1782         }
1783     }
1784 
1785     priv = container_of(ocelot_port, struct ocelot_port_private, port);
1786 
1787     priv->phylink_config.dev = &priv->dev->dev;
1788     priv->phylink_config.type = PHYLINK_NETDEV;
1789     priv->phylink_config.mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
1790         MAC_10 | MAC_100 | MAC_1000FD | MAC_2500FD;
1791 
1792     __set_bit(ocelot_port->phy_mode,
1793           priv->phylink_config.supported_interfaces);
1794 
1795     phylink = phylink_create(&priv->phylink_config,
1796                  of_fwnode_handle(portnp),
1797                  phy_mode, &ocelot_phylink_ops);
1798     if (IS_ERR(phylink)) {
1799         err = PTR_ERR(phylink);
1800         dev_err(dev, "Could not create phylink (%pe)\n", phylink);
1801         return err;
1802     }
1803 
1804     priv->phylink = phylink;
1805 
1806     err = phylink_of_phy_connect(phylink, portnp, 0);
1807     if (err) {
1808         dev_err(dev, "Could not connect to PHY: %pe\n", ERR_PTR(err));
1809         phylink_destroy(phylink);
1810         priv->phylink = NULL;
1811         return err;
1812     }
1813 
1814     return 0;
1815 }
1816 
1817 int ocelot_probe_port(struct ocelot *ocelot, int port, struct regmap *target,
1818               struct device_node *portnp)
1819 {
1820     struct ocelot_port_private *priv;
1821     struct ocelot_port *ocelot_port;
1822     struct net_device *dev;
1823     int err;
1824 
1825     dev = alloc_etherdev(sizeof(struct ocelot_port_private));
1826     if (!dev)
1827         return -ENOMEM;
1828     SET_NETDEV_DEV(dev, ocelot->dev);
1829     priv = netdev_priv(dev);
1830     priv->dev = dev;
1831     ocelot_port = &priv->port;
1832     ocelot_port->ocelot = ocelot;
1833     ocelot_port->index = port;
1834     ocelot_port->target = target;
1835     ocelot->ports[port] = ocelot_port;
1836 
1837     dev->netdev_ops = &ocelot_port_netdev_ops;
1838     dev->ethtool_ops = &ocelot_ethtool_ops;
1839     dev->max_mtu = OCELOT_JUMBO_MTU;
1840 
1841     dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXFCS |
1842         NETIF_F_HW_TC;
1843     dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_TC;
1844 
1845     err = of_get_ethdev_address(portnp, dev);
1846     if (err)
1847         eth_hw_addr_gen(dev, ocelot->base_mac, port);
1848 
1849     ocelot_mact_learn(ocelot, PGID_CPU, dev->dev_addr,
1850               OCELOT_STANDALONE_PVID, ENTRYTYPE_LOCKED);
1851 
1852     ocelot_init_port(ocelot, port);
1853 
1854     err = ocelot_port_phylink_create(ocelot, port, portnp);
1855     if (err)
1856         goto out;
1857 
1858     if (ocelot->fdma)
1859         ocelot_fdma_netdev_init(ocelot, dev);
1860 
1861     err = register_netdev(dev);
1862     if (err) {
1863         dev_err(ocelot->dev, "register_netdev failed\n");
1864         goto out_fdma_deinit;
1865     }
1866 
1867     return 0;
1868 
1869 out_fdma_deinit:
1870     if (ocelot->fdma)
1871         ocelot_fdma_netdev_deinit(ocelot, dev);
1872 out:
1873     ocelot->ports[port] = NULL;
1874     free_netdev(dev);
1875 
1876     return err;
1877 }
1878 
1879 void ocelot_release_port(struct ocelot_port *ocelot_port)
1880 {
1881     struct ocelot_port_private *priv = container_of(ocelot_port,
1882                         struct ocelot_port_private,
1883                         port);
1884     struct ocelot *ocelot = ocelot_port->ocelot;
1885     struct ocelot_fdma *fdma = ocelot->fdma;
1886 
1887     unregister_netdev(priv->dev);
1888 
1889     if (fdma)
1890         ocelot_fdma_netdev_deinit(ocelot, priv->dev);
1891 
1892     if (priv->phylink) {
1893         rtnl_lock();
1894         phylink_disconnect_phy(priv->phylink);
1895         rtnl_unlock();
1896 
1897         phylink_destroy(priv->phylink);
1898     }
1899 
1900     free_netdev(priv->dev);
1901 }
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