1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2 /* Copyright (c) 2020 Mellanox Technologies Inc. All rights reserved. */
4 #include <linux/netdevice.h>
5 #include <linux/list.h>
10 #include "esw/acl/ofld.h"
13 struct mlx5e_rep_bond {
14 struct notifier_block nb;
15 struct netdev_net_notifier nn;
16 struct list_head metadata_list;
19 struct mlx5e_rep_bond_slave_entry {
20 struct list_head list;
21 struct net_device *netdev;
24 struct mlx5e_rep_bond_metadata {
25 struct list_head list; /* link to global list of rep_bond_metadata */
26 struct mlx5_eswitch *esw;
27 /* private of uplink holding rep bond metadata list */
28 struct net_device *lag_dev;
31 struct list_head slaves_list; /* slaves list */
35 static struct mlx5e_rep_bond_metadata *
36 mlx5e_lookup_rep_bond_metadata(struct mlx5_rep_uplink_priv *uplink_priv,
37 const struct net_device *lag_dev)
39 struct mlx5e_rep_bond_metadata *found = NULL;
40 struct mlx5e_rep_bond_metadata *cur;
42 list_for_each_entry(cur, &uplink_priv->bond->metadata_list, list) {
43 if (cur->lag_dev == lag_dev) {
52 static struct mlx5e_rep_bond_slave_entry *
53 mlx5e_lookup_rep_bond_slave_entry(struct mlx5e_rep_bond_metadata *mdata,
54 const struct net_device *netdev)
56 struct mlx5e_rep_bond_slave_entry *found = NULL;
57 struct mlx5e_rep_bond_slave_entry *cur;
59 list_for_each_entry(cur, &mdata->slaves_list, list) {
60 if (cur->netdev == netdev) {
69 static void mlx5e_rep_bond_metadata_release(struct mlx5e_rep_bond_metadata *mdata)
71 netdev_dbg(mdata->lag_dev, "destroy rep_bond_metadata(%d)\n",
72 mdata->metadata_reg_c_0);
73 list_del(&mdata->list);
74 mlx5_esw_match_metadata_free(mdata->esw, mdata->metadata_reg_c_0);
75 WARN_ON(!list_empty(&mdata->slaves_list));
79 /* This must be called under rtnl_lock */
80 int mlx5e_rep_bond_enslave(struct mlx5_eswitch *esw, struct net_device *netdev,
81 struct net_device *lag_dev)
83 struct mlx5e_rep_bond_slave_entry *s_entry;
84 struct mlx5e_rep_bond_metadata *mdata;
85 struct mlx5e_rep_priv *rpriv;
86 struct mlx5e_priv *priv;
91 rpriv = mlx5_eswitch_get_uplink_priv(esw, REP_ETH);
92 mdata = mlx5e_lookup_rep_bond_metadata(&rpriv->uplink_priv, lag_dev);
94 /* First netdev becomes slave, no metadata presents the lag_dev. Create one */
95 mdata = kzalloc(sizeof(*mdata), GFP_KERNEL);
99 mdata->lag_dev = lag_dev;
101 INIT_LIST_HEAD(&mdata->slaves_list);
102 mdata->metadata_reg_c_0 = mlx5_esw_match_metadata_alloc(esw);
103 if (!mdata->metadata_reg_c_0) {
107 list_add(&mdata->list, &rpriv->uplink_priv.bond->metadata_list);
109 netdev_dbg(lag_dev, "create rep_bond_metadata(%d)\n",
110 mdata->metadata_reg_c_0);
113 s_entry = kzalloc(sizeof(*s_entry), GFP_KERNEL);
116 goto entry_alloc_err;
119 s_entry->netdev = netdev;
120 priv = netdev_priv(netdev);
123 err = mlx5_esw_acl_ingress_vport_bond_update(esw, rpriv->rep->vport,
124 mdata->metadata_reg_c_0);
129 list_add_tail(&s_entry->list, &mdata->slaves_list);
130 netdev_dbg(netdev, "enslave rep vport(%d) lag_dev(%s) metadata(0x%x)\n",
131 rpriv->rep->vport, lag_dev->name, mdata->metadata_reg_c_0);
139 mlx5e_rep_bond_metadata_release(mdata);
143 /* This must be called under rtnl_lock */
144 void mlx5e_rep_bond_unslave(struct mlx5_eswitch *esw,
145 const struct net_device *netdev,
146 const struct net_device *lag_dev)
148 struct mlx5e_rep_bond_slave_entry *s_entry;
149 struct mlx5e_rep_bond_metadata *mdata;
150 struct mlx5e_rep_priv *rpriv;
151 struct mlx5e_priv *priv;
155 rpriv = mlx5_eswitch_get_uplink_priv(esw, REP_ETH);
156 mdata = mlx5e_lookup_rep_bond_metadata(&rpriv->uplink_priv, lag_dev);
160 s_entry = mlx5e_lookup_rep_bond_slave_entry(mdata, netdev);
164 priv = netdev_priv(netdev);
167 /* Reset bond_metadata to zero first then reset all ingress/egress
168 * acls and rx rules of unslave representor's vport
170 mlx5_esw_acl_ingress_vport_bond_update(esw, rpriv->rep->vport, 0);
171 mlx5_esw_acl_egress_vport_unbond(esw, rpriv->rep->vport);
172 mlx5e_rep_bond_update(priv, false);
174 list_del(&s_entry->list);
176 netdev_dbg(netdev, "unslave rep vport(%d) lag_dev(%s) metadata(0x%x)\n",
177 rpriv->rep->vport, lag_dev->name, mdata->metadata_reg_c_0);
179 if (--mdata->slaves == 0)
180 mlx5e_rep_bond_metadata_release(mdata);
184 static bool mlx5e_rep_is_lag_netdev(struct net_device *netdev)
186 struct mlx5e_rep_priv *rpriv;
187 struct mlx5e_priv *priv;
189 /* A given netdev is not a representor or not a slave of LAG configuration */
190 if (!mlx5e_eswitch_rep(netdev) || !netif_is_lag_port(netdev))
193 priv = netdev_priv(netdev);
196 /* Egress acl forward to vport is supported only non-uplink representor */
197 return rpriv->rep->vport != MLX5_VPORT_UPLINK;
200 static void mlx5e_rep_changelowerstate_event(struct net_device *netdev, void *ptr)
202 struct netdev_notifier_changelowerstate_info *info;
203 struct netdev_lag_lower_state_info *lag_info;
204 struct mlx5e_rep_priv *rpriv;
205 struct net_device *lag_dev;
206 struct mlx5e_priv *priv;
207 struct list_head *iter;
208 struct net_device *dev;
213 if (!mlx5e_rep_is_lag_netdev(netdev))
217 lag_info = info->lower_state_info;
218 /* This is not an event of a representor becoming active slave */
219 if (!lag_info->tx_enabled)
222 priv = netdev_priv(netdev);
224 fwd_vport_num = rpriv->rep->vport;
225 lag_dev = netdev_master_upper_dev_get(netdev);
229 netdev_dbg(netdev, "lag_dev(%s)'s slave vport(%d) is txable(%d)\n",
230 lag_dev->name, fwd_vport_num, net_lag_port_dev_txable(netdev));
232 /* Point everyone's egress acl to the vport of the active representor */
233 netdev_for_each_lower_dev(lag_dev, dev, iter) {
234 priv = netdev_priv(dev);
236 acl_vport_num = rpriv->rep->vport;
237 if (acl_vport_num != fwd_vport_num) {
238 /* Only single rx_rule for unique bond_metadata should be
239 * present, delete it if it's saved as passive vport's
240 * rx_rule with destination as passive vport's root_ft
242 mlx5e_rep_bond_update(priv, true);
243 err = mlx5_esw_acl_egress_vport_bond(priv->mdev->priv.eswitch,
248 "configure slave vport(%d) egress fwd, err(%d)",
253 /* Insert new rx_rule for unique bond_metadata, save it as active vport's
254 * rx_rule with new destination as active vport's root_ft
256 err = mlx5e_rep_bond_update(netdev_priv(netdev), false);
258 netdev_warn(netdev, "configure active slave vport(%d) rx_rule, err(%d)",
262 static void mlx5e_rep_changeupper_event(struct net_device *netdev, void *ptr)
264 struct netdev_notifier_changeupper_info *info = ptr;
265 struct mlx5e_rep_priv *rpriv;
266 struct net_device *lag_dev;
267 struct mlx5e_priv *priv;
269 if (!mlx5e_rep_is_lag_netdev(netdev))
272 priv = netdev_priv(netdev);
274 lag_dev = info->upper_dev;
276 netdev_dbg(netdev, "%sslave vport(%d) lag(%s)\n",
277 info->linking ? "en" : "un", rpriv->rep->vport, lag_dev->name);
280 mlx5e_rep_bond_enslave(priv->mdev->priv.eswitch, netdev, lag_dev);
282 mlx5e_rep_bond_unslave(priv->mdev->priv.eswitch, netdev, lag_dev);
285 /* Bond device of representors and netdev events are used here in specific way
286 * to support eswitch vports bonding and to perform failover of eswitch vport
287 * by modifying the vport's egress acl of lower dev representors. Thus this
288 * also change the traditional behavior of lower dev under bond device.
289 * All non-representor netdevs or representors of other vendors as lower dev
290 * of bond device are not supported.
292 static int mlx5e_rep_esw_bond_netevent(struct notifier_block *nb,
293 unsigned long event, void *ptr)
295 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
298 case NETDEV_CHANGELOWERSTATE:
299 mlx5e_rep_changelowerstate_event(netdev, ptr);
301 case NETDEV_CHANGEUPPER:
302 mlx5e_rep_changeupper_event(netdev, ptr);
308 /* If HW support eswitch vports bonding, register a specific notifier to
309 * handle it when two or more representors are bonded
311 int mlx5e_rep_bond_init(struct mlx5e_rep_priv *rpriv)
313 struct mlx5_rep_uplink_priv *uplink_priv = &rpriv->uplink_priv;
314 struct net_device *netdev = rpriv->netdev;
315 struct mlx5e_priv *priv;
318 priv = netdev_priv(netdev);
319 if (!mlx5_esw_acl_egress_fwd2vport_supported(priv->mdev->priv.eswitch))
322 uplink_priv->bond = kvzalloc(sizeof(*uplink_priv->bond), GFP_KERNEL);
323 if (!uplink_priv->bond) {
328 INIT_LIST_HEAD(&uplink_priv->bond->metadata_list);
329 uplink_priv->bond->nb.notifier_call = mlx5e_rep_esw_bond_netevent;
330 ret = register_netdevice_notifier_dev_net(netdev,
331 &uplink_priv->bond->nb,
332 &uplink_priv->bond->nn);
334 netdev_err(netdev, "register bonding netevent notifier, err(%d)\n", ret);
335 kvfree(uplink_priv->bond);
336 uplink_priv->bond = NULL;
343 void mlx5e_rep_bond_cleanup(struct mlx5e_rep_priv *rpriv)
345 struct mlx5e_priv *priv = netdev_priv(rpriv->netdev);
347 if (!mlx5_esw_acl_egress_fwd2vport_supported(priv->mdev->priv.eswitch) ||
348 !rpriv->uplink_priv.bond)
351 unregister_netdevice_notifier_dev_net(rpriv->netdev,
352 &rpriv->uplink_priv.bond->nb,
353 &rpriv->uplink_priv.bond->nn);
354 kvfree(rpriv->uplink_priv.bond);