1 // SPDX-License-Identifier: GPL-2.0+
2
3 #include <linux/if_bridge.h>
4
5 #include "lan966x_main.h"
6
lan966x_lag_set_aggr_pgids(struct lan966x * lan966x)7 static void lan966x_lag_set_aggr_pgids(struct lan966x *lan966x)
8 {
9 u32 visited = GENMASK(lan966x->num_phys_ports - 1, 0);
10 int p, lag, i;
11
12 /* Reset destination and aggregation PGIDS */
13 for (p = 0; p < lan966x->num_phys_ports; ++p)
14 lan_wr(ANA_PGID_PGID_SET(BIT(p)),
15 lan966x, ANA_PGID(p));
16
17 for (p = PGID_AGGR; p < PGID_SRC; ++p)
18 lan_wr(ANA_PGID_PGID_SET(visited),
19 lan966x, ANA_PGID(p));
20
21 /* The visited ports bitmask holds the list of ports offloading any
22 * bonding interface. Initially we mark all these ports as unvisited,
23 * then every time we visit a port in this bitmask, we know that it is
24 * the lowest numbered port, i.e. the one whose logical ID == physical
25 * port ID == LAG ID. So we mark as visited all further ports in the
26 * bitmask that are offloading the same bonding interface. This way,
27 * we set up the aggregation PGIDs only once per bonding interface.
28 */
29 for (p = 0; p < lan966x->num_phys_ports; ++p) {
30 struct lan966x_port *port = lan966x->ports[p];
31
32 if (!port || !port->bond)
33 continue;
34
35 visited &= ~BIT(p);
36 }
37
38 /* Now, set PGIDs for each active LAG */
39 for (lag = 0; lag < lan966x->num_phys_ports; ++lag) {
40 struct net_device *bond = lan966x->ports[lag]->bond;
41 int num_active_ports = 0;
42 unsigned long bond_mask;
43 u8 aggr_idx[16];
44
45 if (!bond || (visited & BIT(lag)))
46 continue;
47
48 bond_mask = lan966x_lag_get_mask(lan966x, bond);
49
50 for_each_set_bit(p, &bond_mask, lan966x->num_phys_ports) {
51 struct lan966x_port *port = lan966x->ports[p];
52
53 lan_wr(ANA_PGID_PGID_SET(bond_mask),
54 lan966x, ANA_PGID(p));
55 if (port->lag_tx_active)
56 aggr_idx[num_active_ports++] = p;
57 }
58
59 for (i = PGID_AGGR; i < PGID_SRC; ++i) {
60 u32 ac;
61
62 ac = lan_rd(lan966x, ANA_PGID(i));
63 ac &= ~bond_mask;
64 /* Don't do division by zero if there was no active
65 * port. Just make all aggregation codes zero.
66 */
67 if (num_active_ports)
68 ac |= BIT(aggr_idx[i % num_active_ports]);
69 lan_wr(ANA_PGID_PGID_SET(ac),
70 lan966x, ANA_PGID(i));
71 }
72
73 /* Mark all ports in the same LAG as visited to avoid applying
74 * the same config again.
75 */
76 for (p = lag; p < lan966x->num_phys_ports; p++) {
77 struct lan966x_port *port = lan966x->ports[p];
78
79 if (!port)
80 continue;
81
82 if (port->bond == bond)
83 visited |= BIT(p);
84 }
85 }
86 }
87
lan966x_lag_set_port_ids(struct lan966x * lan966x)88 static void lan966x_lag_set_port_ids(struct lan966x *lan966x)
89 {
90 struct lan966x_port *port;
91 u32 bond_mask;
92 u32 lag_id;
93 int p;
94
95 for (p = 0; p < lan966x->num_phys_ports; ++p) {
96 port = lan966x->ports[p];
97 if (!port)
98 continue;
99
100 lag_id = port->chip_port;
101
102 bond_mask = lan966x_lag_get_mask(lan966x, port->bond);
103 if (bond_mask)
104 lag_id = __ffs(bond_mask);
105
106 lan_rmw(ANA_PORT_CFG_PORTID_VAL_SET(lag_id),
107 ANA_PORT_CFG_PORTID_VAL,
108 lan966x, ANA_PORT_CFG(port->chip_port));
109 }
110 }
111
lan966x_lag_update_ids(struct lan966x * lan966x)112 static void lan966x_lag_update_ids(struct lan966x *lan966x)
113 {
114 lan966x_lag_set_port_ids(lan966x);
115 lan966x_update_fwd_mask(lan966x);
116 lan966x_lag_set_aggr_pgids(lan966x);
117 }
118
lan966x_lag_port_join(struct lan966x_port * port,struct net_device * brport_dev,struct net_device * bond,struct netlink_ext_ack * extack)119 int lan966x_lag_port_join(struct lan966x_port *port,
120 struct net_device *brport_dev,
121 struct net_device *bond,
122 struct netlink_ext_ack *extack)
123 {
124 struct lan966x *lan966x = port->lan966x;
125 struct net_device *dev = port->dev;
126 u32 lag_id = -1;
127 u32 bond_mask;
128 int err;
129
130 bond_mask = lan966x_lag_get_mask(lan966x, bond);
131 if (bond_mask)
132 lag_id = __ffs(bond_mask);
133
134 port->bond = bond;
135 lan966x_lag_update_ids(lan966x);
136
137 err = switchdev_bridge_port_offload(brport_dev, dev, port,
138 &lan966x_switchdev_nb,
139 &lan966x_switchdev_blocking_nb,
140 false, extack);
141 if (err)
142 goto out;
143
144 lan966x_port_stp_state_set(port, br_port_get_stp_state(brport_dev));
145
146 if (lan966x_lag_first_port(port->bond, port->dev) &&
147 lag_id != -1)
148 lan966x_mac_lag_replace_port_entry(lan966x,
149 lan966x->ports[lag_id],
150 port);
151
152 return 0;
153
154 out:
155 port->bond = NULL;
156 lan966x_lag_update_ids(lan966x);
157
158 return err;
159 }
160
lan966x_lag_port_leave(struct lan966x_port * port,struct net_device * bond)161 void lan966x_lag_port_leave(struct lan966x_port *port, struct net_device *bond)
162 {
163 struct lan966x *lan966x = port->lan966x;
164 u32 bond_mask;
165 u32 lag_id;
166
167 if (lan966x_lag_first_port(port->bond, port->dev)) {
168 bond_mask = lan966x_lag_get_mask(lan966x, port->bond);
169 bond_mask &= ~BIT(port->chip_port);
170 if (bond_mask) {
171 lag_id = __ffs(bond_mask);
172 lan966x_mac_lag_replace_port_entry(lan966x, port,
173 lan966x->ports[lag_id]);
174 } else {
175 lan966x_mac_lag_remove_port_entry(lan966x, port);
176 }
177 }
178
179 port->bond = NULL;
180 lan966x_lag_update_ids(lan966x);
181 lan966x_port_stp_state_set(port, BR_STATE_FORWARDING);
182 }
183
lan966x_lag_port_check_hash_types(struct lan966x * lan966x,enum netdev_lag_hash hash_type)184 static bool lan966x_lag_port_check_hash_types(struct lan966x *lan966x,
185 enum netdev_lag_hash hash_type)
186 {
187 int p;
188
189 for (p = 0; p < lan966x->num_phys_ports; ++p) {
190 struct lan966x_port *port = lan966x->ports[p];
191
192 if (!port || !port->bond)
193 continue;
194
195 if (port->hash_type != hash_type)
196 return false;
197 }
198
199 return true;
200 }
201
lan966x_lag_port_prechangeupper(struct net_device * dev,struct netdev_notifier_changeupper_info * info)202 int lan966x_lag_port_prechangeupper(struct net_device *dev,
203 struct netdev_notifier_changeupper_info *info)
204 {
205 struct lan966x_port *port = netdev_priv(dev);
206 struct lan966x *lan966x = port->lan966x;
207 struct netdev_lag_upper_info *lui;
208 struct netlink_ext_ack *extack;
209
210 extack = netdev_notifier_info_to_extack(&info->info);
211 lui = info->upper_info;
212 if (!lui) {
213 port->hash_type = NETDEV_LAG_HASH_NONE;
214 return NOTIFY_DONE;
215 }
216
217 if (lui->tx_type != NETDEV_LAG_TX_TYPE_HASH) {
218 NL_SET_ERR_MSG_MOD(extack,
219 "LAG device using unsupported Tx type");
220 return -EINVAL;
221 }
222
223 if (!lan966x_lag_port_check_hash_types(lan966x, lui->hash_type)) {
224 NL_SET_ERR_MSG_MOD(extack,
225 "LAG devices can have only the same hash_type");
226 return -EINVAL;
227 }
228
229 switch (lui->hash_type) {
230 case NETDEV_LAG_HASH_L2:
231 lan_wr(ANA_AGGR_CFG_AC_DMAC_ENA_SET(1) |
232 ANA_AGGR_CFG_AC_SMAC_ENA_SET(1),
233 lan966x, ANA_AGGR_CFG);
234 break;
235 case NETDEV_LAG_HASH_L34:
236 lan_wr(ANA_AGGR_CFG_AC_IP6_TCPUDP_ENA_SET(1) |
237 ANA_AGGR_CFG_AC_IP4_TCPUDP_ENA_SET(1) |
238 ANA_AGGR_CFG_AC_IP4_SIPDIP_ENA_SET(1),
239 lan966x, ANA_AGGR_CFG);
240 break;
241 case NETDEV_LAG_HASH_L23:
242 lan_wr(ANA_AGGR_CFG_AC_DMAC_ENA_SET(1) |
243 ANA_AGGR_CFG_AC_SMAC_ENA_SET(1) |
244 ANA_AGGR_CFG_AC_IP6_TCPUDP_ENA_SET(1) |
245 ANA_AGGR_CFG_AC_IP4_TCPUDP_ENA_SET(1),
246 lan966x, ANA_AGGR_CFG);
247 break;
248 default:
249 NL_SET_ERR_MSG_MOD(extack,
250 "LAG device using unsupported hash type");
251 return -EINVAL;
252 }
253
254 port->hash_type = lui->hash_type;
255
256 return NOTIFY_OK;
257 }
258
lan966x_lag_port_changelowerstate(struct net_device * dev,struct netdev_notifier_changelowerstate_info * info)259 int lan966x_lag_port_changelowerstate(struct net_device *dev,
260 struct netdev_notifier_changelowerstate_info *info)
261 {
262 struct netdev_lag_lower_state_info *lag = info->lower_state_info;
263 struct lan966x_port *port = netdev_priv(dev);
264 struct lan966x *lan966x = port->lan966x;
265 bool is_active;
266
267 if (!port->bond)
268 return NOTIFY_DONE;
269
270 is_active = lag->link_up && lag->tx_enabled;
271 if (port->lag_tx_active == is_active)
272 return NOTIFY_DONE;
273
274 port->lag_tx_active = is_active;
275 lan966x_lag_set_aggr_pgids(lan966x);
276
277 return NOTIFY_OK;
278 }
279
lan966x_lag_netdev_prechangeupper(struct net_device * dev,struct netdev_notifier_changeupper_info * info)280 int lan966x_lag_netdev_prechangeupper(struct net_device *dev,
281 struct netdev_notifier_changeupper_info *info)
282 {
283 struct lan966x_port *port;
284 struct net_device *lower;
285 struct list_head *iter;
286 int err;
287
288 netdev_for_each_lower_dev(dev, lower, iter) {
289 if (!lan966x_netdevice_check(lower))
290 continue;
291
292 port = netdev_priv(lower);
293 if (port->bond != dev)
294 continue;
295
296 err = lan966x_port_prechangeupper(lower, dev, info);
297 if (err)
298 return err;
299 }
300
301 return NOTIFY_DONE;
302 }
303
lan966x_lag_netdev_changeupper(struct net_device * dev,struct netdev_notifier_changeupper_info * info)304 int lan966x_lag_netdev_changeupper(struct net_device *dev,
305 struct netdev_notifier_changeupper_info *info)
306 {
307 struct lan966x_port *port;
308 struct net_device *lower;
309 struct list_head *iter;
310 int err;
311
312 netdev_for_each_lower_dev(dev, lower, iter) {
313 if (!lan966x_netdevice_check(lower))
314 continue;
315
316 port = netdev_priv(lower);
317 if (port->bond != dev)
318 continue;
319
320 err = lan966x_port_changeupper(lower, dev, info);
321 if (err)
322 return err;
323 }
324
325 return NOTIFY_DONE;
326 }
327
lan966x_lag_first_port(struct net_device * lag,struct net_device * dev)328 bool lan966x_lag_first_port(struct net_device *lag, struct net_device *dev)
329 {
330 struct lan966x_port *port = netdev_priv(dev);
331 struct lan966x *lan966x = port->lan966x;
332 unsigned long bond_mask;
333
334 if (port->bond != lag)
335 return false;
336
337 bond_mask = lan966x_lag_get_mask(lan966x, lag);
338 if (bond_mask && port->chip_port == __ffs(bond_mask))
339 return true;
340
341 return false;
342 }
343
lan966x_lag_get_mask(struct lan966x * lan966x,struct net_device * bond)344 u32 lan966x_lag_get_mask(struct lan966x *lan966x, struct net_device *bond)
345 {
346 struct lan966x_port *port;
347 u32 mask = 0;
348 int p;
349
350 if (!bond)
351 return mask;
352
353 for (p = 0; p < lan966x->num_phys_ports; p++) {
354 port = lan966x->ports[p];
355 if (!port)
356 continue;
357
358 if (port->bond == bond)
359 mask |= BIT(p);
360 }
361
362 return mask;
363 }
364