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1/*
2 * net/dsa/slave.c - Slave device handling
3 * Copyright (c) 2008-2009 Marvell Semiconductor
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11#include <linux/list.h>
12#include <linux/netdevice.h>
13#include <linux/etherdevice.h>
14#include <linux/phy.h>
15#include "dsa_priv.h"
16
17/* slave mii_bus handling ***************************************************/
18static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
19{
20 struct dsa_switch *ds = bus->priv;
21
22 if (ds->phys_port_mask & (1 << addr))
23 return ds->drv->phy_read(ds, addr, reg);
24
25 return 0xffff;
26}
27
28static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
29{
30 struct dsa_switch *ds = bus->priv;
31
32 if (ds->phys_port_mask & (1 << addr))
33 return ds->drv->phy_write(ds, addr, reg, val);
34
35 return 0;
36}
37
38void dsa_slave_mii_bus_init(struct dsa_switch *ds)
39{
40 ds->slave_mii_bus->priv = (void *)ds;
41 ds->slave_mii_bus->name = "dsa slave smi";
42 ds->slave_mii_bus->read = dsa_slave_phy_read;
43 ds->slave_mii_bus->write = dsa_slave_phy_write;
44 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "%s:%.2x",
45 ds->master_mii_bus->id, ds->pd->sw_addr);
46 ds->slave_mii_bus->parent = &ds->master_mii_bus->dev;
47}
48
49
50/* slave device handling ****************************************************/
51static int dsa_slave_init(struct net_device *dev)
52{
53 struct dsa_slave_priv *p = netdev_priv(dev);
54
55 dev->iflink = p->parent->dst->master_netdev->ifindex;
56
57 return 0;
58}
59
60static int dsa_slave_open(struct net_device *dev)
61{
62 struct dsa_slave_priv *p = netdev_priv(dev);
63 struct net_device *master = p->parent->dst->master_netdev;
64 int err;
65
66 if (!(master->flags & IFF_UP))
67 return -ENETDOWN;
68
69 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
70 err = dev_uc_add(master, dev->dev_addr);
71 if (err < 0)
72 goto out;
73 }
74
75 if (dev->flags & IFF_ALLMULTI) {
76 err = dev_set_allmulti(master, 1);
77 if (err < 0)
78 goto del_unicast;
79 }
80 if (dev->flags & IFF_PROMISC) {
81 err = dev_set_promiscuity(master, 1);
82 if (err < 0)
83 goto clear_allmulti;
84 }
85
86 return 0;
87
88clear_allmulti:
89 if (dev->flags & IFF_ALLMULTI)
90 dev_set_allmulti(master, -1);
91del_unicast:
92 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
93 dev_uc_del(master, dev->dev_addr);
94out:
95 return err;
96}
97
98static int dsa_slave_close(struct net_device *dev)
99{
100 struct dsa_slave_priv *p = netdev_priv(dev);
101 struct net_device *master = p->parent->dst->master_netdev;
102
103 dev_mc_unsync(master, dev);
104 dev_uc_unsync(master, dev);
105 if (dev->flags & IFF_ALLMULTI)
106 dev_set_allmulti(master, -1);
107 if (dev->flags & IFF_PROMISC)
108 dev_set_promiscuity(master, -1);
109
110 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
111 dev_uc_del(master, dev->dev_addr);
112
113 return 0;
114}
115
116static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
117{
118 struct dsa_slave_priv *p = netdev_priv(dev);
119 struct net_device *master = p->parent->dst->master_netdev;
120
121 if (change & IFF_ALLMULTI)
122 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
123 if (change & IFF_PROMISC)
124 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
125}
126
127static void dsa_slave_set_rx_mode(struct net_device *dev)
128{
129 struct dsa_slave_priv *p = netdev_priv(dev);
130 struct net_device *master = p->parent->dst->master_netdev;
131
132 dev_mc_sync(master, dev);
133 dev_uc_sync(master, dev);
134}
135
136static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
137{
138 struct dsa_slave_priv *p = netdev_priv(dev);
139 struct net_device *master = p->parent->dst->master_netdev;
140 struct sockaddr *addr = a;
141 int err;
142
143 if (!is_valid_ether_addr(addr->sa_data))
144 return -EADDRNOTAVAIL;
145
146 if (!(dev->flags & IFF_UP))
147 goto out;
148
149 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
150 err = dev_uc_add(master, addr->sa_data);
151 if (err < 0)
152 return err;
153 }
154
155 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
156 dev_uc_del(master, dev->dev_addr);
157
158out:
159 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
160
161 return 0;
162}
163
164static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
165{
166 struct dsa_slave_priv *p = netdev_priv(dev);
167
168 if (p->phy != NULL)
169 return phy_mii_ioctl(p->phy, ifr, cmd);
170
171 return -EOPNOTSUPP;
172}
173
174
175/* ethtool operations *******************************************************/
176static int
177dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
178{
179 struct dsa_slave_priv *p = netdev_priv(dev);
180 int err;
181
182 err = -EOPNOTSUPP;
183 if (p->phy != NULL) {
184 err = phy_read_status(p->phy);
185 if (err == 0)
186 err = phy_ethtool_gset(p->phy, cmd);
187 }
188
189 return err;
190}
191
192static int
193dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
194{
195 struct dsa_slave_priv *p = netdev_priv(dev);
196
197 if (p->phy != NULL)
198 return phy_ethtool_sset(p->phy, cmd);
199
200 return -EOPNOTSUPP;
201}
202
203static void dsa_slave_get_drvinfo(struct net_device *dev,
204 struct ethtool_drvinfo *drvinfo)
205{
206 strncpy(drvinfo->driver, "dsa", 32);
207 strncpy(drvinfo->version, dsa_driver_version, 32);
208 strncpy(drvinfo->fw_version, "N/A", 32);
209 strncpy(drvinfo->bus_info, "platform", 32);
210}
211
212static int dsa_slave_nway_reset(struct net_device *dev)
213{
214 struct dsa_slave_priv *p = netdev_priv(dev);
215
216 if (p->phy != NULL)
217 return genphy_restart_aneg(p->phy);
218
219 return -EOPNOTSUPP;
220}
221
222static u32 dsa_slave_get_link(struct net_device *dev)
223{
224 struct dsa_slave_priv *p = netdev_priv(dev);
225
226 if (p->phy != NULL) {
227 genphy_update_link(p->phy);
228 return p->phy->link;
229 }
230
231 return -EOPNOTSUPP;
232}
233
234static void dsa_slave_get_strings(struct net_device *dev,
235 uint32_t stringset, uint8_t *data)
236{
237 struct dsa_slave_priv *p = netdev_priv(dev);
238 struct dsa_switch *ds = p->parent;
239
240 if (stringset == ETH_SS_STATS) {
241 int len = ETH_GSTRING_LEN;
242
243 strncpy(data, "tx_packets", len);
244 strncpy(data + len, "tx_bytes", len);
245 strncpy(data + 2 * len, "rx_packets", len);
246 strncpy(data + 3 * len, "rx_bytes", len);
247 if (ds->drv->get_strings != NULL)
248 ds->drv->get_strings(ds, p->port, data + 4 * len);
249 }
250}
251
252static void dsa_slave_get_ethtool_stats(struct net_device *dev,
253 struct ethtool_stats *stats,
254 uint64_t *data)
255{
256 struct dsa_slave_priv *p = netdev_priv(dev);
257 struct dsa_switch *ds = p->parent;
258
259 data[0] = p->dev->stats.tx_packets;
260 data[1] = p->dev->stats.tx_bytes;
261 data[2] = p->dev->stats.rx_packets;
262 data[3] = p->dev->stats.rx_bytes;
263 if (ds->drv->get_ethtool_stats != NULL)
264 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
265}
266
267static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
268{
269 struct dsa_slave_priv *p = netdev_priv(dev);
270 struct dsa_switch *ds = p->parent;
271
272 if (sset == ETH_SS_STATS) {
273 int count;
274
275 count = 4;
276 if (ds->drv->get_sset_count != NULL)
277 count += ds->drv->get_sset_count(ds);
278
279 return count;
280 }
281
282 return -EOPNOTSUPP;
283}
284
285static const struct ethtool_ops dsa_slave_ethtool_ops = {
286 .get_settings = dsa_slave_get_settings,
287 .set_settings = dsa_slave_set_settings,
288 .get_drvinfo = dsa_slave_get_drvinfo,
289 .nway_reset = dsa_slave_nway_reset,
290 .get_link = dsa_slave_get_link,
291 .get_strings = dsa_slave_get_strings,
292 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
293 .get_sset_count = dsa_slave_get_sset_count,
294};
295
296#ifdef CONFIG_NET_DSA_TAG_DSA
297static const struct net_device_ops dsa_netdev_ops = {
298 .ndo_init = dsa_slave_init,
299 .ndo_open = dsa_slave_open,
300 .ndo_stop = dsa_slave_close,
301 .ndo_start_xmit = dsa_xmit,
302 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
303 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
304 .ndo_set_mac_address = dsa_slave_set_mac_address,
305 .ndo_do_ioctl = dsa_slave_ioctl,
306};
307#endif
308#ifdef CONFIG_NET_DSA_TAG_EDSA
309static const struct net_device_ops edsa_netdev_ops = {
310 .ndo_init = dsa_slave_init,
311 .ndo_open = dsa_slave_open,
312 .ndo_stop = dsa_slave_close,
313 .ndo_start_xmit = edsa_xmit,
314 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
315 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
316 .ndo_set_mac_address = dsa_slave_set_mac_address,
317 .ndo_do_ioctl = dsa_slave_ioctl,
318};
319#endif
320#ifdef CONFIG_NET_DSA_TAG_TRAILER
321static const struct net_device_ops trailer_netdev_ops = {
322 .ndo_init = dsa_slave_init,
323 .ndo_open = dsa_slave_open,
324 .ndo_stop = dsa_slave_close,
325 .ndo_start_xmit = trailer_xmit,
326 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
327 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
328 .ndo_set_mac_address = dsa_slave_set_mac_address,
329 .ndo_do_ioctl = dsa_slave_ioctl,
330};
331#endif
332
333/* slave device setup *******************************************************/
334struct net_device *
335dsa_slave_create(struct dsa_switch *ds, struct device *parent,
336 int port, char *name)
337{
338 struct net_device *master = ds->dst->master_netdev;
339 struct net_device *slave_dev;
340 struct dsa_slave_priv *p;
341 int ret;
342
343 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv),
344 name, ether_setup);
345 if (slave_dev == NULL)
346 return slave_dev;
347
348 slave_dev->features = master->vlan_features;
349 SET_ETHTOOL_OPS(slave_dev, &dsa_slave_ethtool_ops);
350 memcpy(slave_dev->dev_addr, master->dev_addr, ETH_ALEN);
351 slave_dev->tx_queue_len = 0;
352
353 switch (ds->dst->tag_protocol) {
354#ifdef CONFIG_NET_DSA_TAG_DSA
355 case htons(ETH_P_DSA):
356 slave_dev->netdev_ops = &dsa_netdev_ops;
357 break;
358#endif
359#ifdef CONFIG_NET_DSA_TAG_EDSA
360 case htons(ETH_P_EDSA):
361 slave_dev->netdev_ops = &edsa_netdev_ops;
362 break;
363#endif
364#ifdef CONFIG_NET_DSA_TAG_TRAILER
365 case htons(ETH_P_TRAILER):
366 slave_dev->netdev_ops = &trailer_netdev_ops;
367 break;
368#endif
369 default:
370 BUG();
371 }
372
373 SET_NETDEV_DEV(slave_dev, parent);
374 slave_dev->vlan_features = master->vlan_features;
375
376 p = netdev_priv(slave_dev);
377 p->dev = slave_dev;
378 p->parent = ds;
379 p->port = port;
380 p->phy = ds->slave_mii_bus->phy_map[port];
381
382 ret = register_netdev(slave_dev);
383 if (ret) {
384 printk(KERN_ERR "%s: error %d registering interface %s\n",
385 master->name, ret, slave_dev->name);
386 free_netdev(slave_dev);
387 return NULL;
388 }
389
390 netif_carrier_off(slave_dev);
391
392 if (p->phy != NULL) {
393 phy_attach(slave_dev, dev_name(&p->phy->dev),
394 0, PHY_INTERFACE_MODE_GMII);
395
396 p->phy->autoneg = AUTONEG_ENABLE;
397 p->phy->speed = 0;
398 p->phy->duplex = 0;
399 p->phy->advertising = p->phy->supported | ADVERTISED_Autoneg;
400 phy_start_aneg(p->phy);
401 }
402
403 return slave_dev;
404}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * net/dsa/slave.c - Slave device handling
4 * Copyright (c) 2008-2009 Marvell Semiconductor
5 */
6
7#include <linux/list.h>
8#include <linux/etherdevice.h>
9#include <linux/netdevice.h>
10#include <linux/phy.h>
11#include <linux/phy_fixed.h>
12#include <linux/phylink.h>
13#include <linux/of_net.h>
14#include <linux/of_mdio.h>
15#include <linux/mdio.h>
16#include <net/rtnetlink.h>
17#include <net/pkt_cls.h>
18#include <net/selftests.h>
19#include <net/tc_act/tc_mirred.h>
20#include <linux/if_bridge.h>
21#include <linux/if_hsr.h>
22#include <net/dcbnl.h>
23#include <linux/netpoll.h>
24
25#include "dsa.h"
26#include "port.h"
27#include "master.h"
28#include "netlink.h"
29#include "slave.h"
30#include "tag.h"
31
32struct dsa_switchdev_event_work {
33 struct net_device *dev;
34 struct net_device *orig_dev;
35 struct work_struct work;
36 unsigned long event;
37 /* Specific for SWITCHDEV_FDB_ADD_TO_DEVICE and
38 * SWITCHDEV_FDB_DEL_TO_DEVICE
39 */
40 unsigned char addr[ETH_ALEN];
41 u16 vid;
42 bool host_addr;
43};
44
45enum dsa_standalone_event {
46 DSA_UC_ADD,
47 DSA_UC_DEL,
48 DSA_MC_ADD,
49 DSA_MC_DEL,
50};
51
52struct dsa_standalone_event_work {
53 struct work_struct work;
54 struct net_device *dev;
55 enum dsa_standalone_event event;
56 unsigned char addr[ETH_ALEN];
57 u16 vid;
58};
59
60static bool dsa_switch_supports_uc_filtering(struct dsa_switch *ds)
61{
62 return ds->ops->port_fdb_add && ds->ops->port_fdb_del &&
63 ds->fdb_isolation && !ds->vlan_filtering_is_global &&
64 !ds->needs_standalone_vlan_filtering;
65}
66
67static bool dsa_switch_supports_mc_filtering(struct dsa_switch *ds)
68{
69 return ds->ops->port_mdb_add && ds->ops->port_mdb_del &&
70 ds->fdb_isolation && !ds->vlan_filtering_is_global &&
71 !ds->needs_standalone_vlan_filtering;
72}
73
74static void dsa_slave_standalone_event_work(struct work_struct *work)
75{
76 struct dsa_standalone_event_work *standalone_work =
77 container_of(work, struct dsa_standalone_event_work, work);
78 const unsigned char *addr = standalone_work->addr;
79 struct net_device *dev = standalone_work->dev;
80 struct dsa_port *dp = dsa_slave_to_port(dev);
81 struct switchdev_obj_port_mdb mdb;
82 struct dsa_switch *ds = dp->ds;
83 u16 vid = standalone_work->vid;
84 int err;
85
86 switch (standalone_work->event) {
87 case DSA_UC_ADD:
88 err = dsa_port_standalone_host_fdb_add(dp, addr, vid);
89 if (err) {
90 dev_err(ds->dev,
91 "port %d failed to add %pM vid %d to fdb: %d\n",
92 dp->index, addr, vid, err);
93 break;
94 }
95 break;
96
97 case DSA_UC_DEL:
98 err = dsa_port_standalone_host_fdb_del(dp, addr, vid);
99 if (err) {
100 dev_err(ds->dev,
101 "port %d failed to delete %pM vid %d from fdb: %d\n",
102 dp->index, addr, vid, err);
103 }
104
105 break;
106 case DSA_MC_ADD:
107 ether_addr_copy(mdb.addr, addr);
108 mdb.vid = vid;
109
110 err = dsa_port_standalone_host_mdb_add(dp, &mdb);
111 if (err) {
112 dev_err(ds->dev,
113 "port %d failed to add %pM vid %d to mdb: %d\n",
114 dp->index, addr, vid, err);
115 break;
116 }
117 break;
118 case DSA_MC_DEL:
119 ether_addr_copy(mdb.addr, addr);
120 mdb.vid = vid;
121
122 err = dsa_port_standalone_host_mdb_del(dp, &mdb);
123 if (err) {
124 dev_err(ds->dev,
125 "port %d failed to delete %pM vid %d from mdb: %d\n",
126 dp->index, addr, vid, err);
127 }
128
129 break;
130 }
131
132 kfree(standalone_work);
133}
134
135static int dsa_slave_schedule_standalone_work(struct net_device *dev,
136 enum dsa_standalone_event event,
137 const unsigned char *addr,
138 u16 vid)
139{
140 struct dsa_standalone_event_work *standalone_work;
141
142 standalone_work = kzalloc(sizeof(*standalone_work), GFP_ATOMIC);
143 if (!standalone_work)
144 return -ENOMEM;
145
146 INIT_WORK(&standalone_work->work, dsa_slave_standalone_event_work);
147 standalone_work->event = event;
148 standalone_work->dev = dev;
149
150 ether_addr_copy(standalone_work->addr, addr);
151 standalone_work->vid = vid;
152
153 dsa_schedule_work(&standalone_work->work);
154
155 return 0;
156}
157
158static int dsa_slave_sync_uc(struct net_device *dev,
159 const unsigned char *addr)
160{
161 struct net_device *master = dsa_slave_to_master(dev);
162 struct dsa_port *dp = dsa_slave_to_port(dev);
163
164 dev_uc_add(master, addr);
165
166 if (!dsa_switch_supports_uc_filtering(dp->ds))
167 return 0;
168
169 return dsa_slave_schedule_standalone_work(dev, DSA_UC_ADD, addr, 0);
170}
171
172static int dsa_slave_unsync_uc(struct net_device *dev,
173 const unsigned char *addr)
174{
175 struct net_device *master = dsa_slave_to_master(dev);
176 struct dsa_port *dp = dsa_slave_to_port(dev);
177
178 dev_uc_del(master, addr);
179
180 if (!dsa_switch_supports_uc_filtering(dp->ds))
181 return 0;
182
183 return dsa_slave_schedule_standalone_work(dev, DSA_UC_DEL, addr, 0);
184}
185
186static int dsa_slave_sync_mc(struct net_device *dev,
187 const unsigned char *addr)
188{
189 struct net_device *master = dsa_slave_to_master(dev);
190 struct dsa_port *dp = dsa_slave_to_port(dev);
191
192 dev_mc_add(master, addr);
193
194 if (!dsa_switch_supports_mc_filtering(dp->ds))
195 return 0;
196
197 return dsa_slave_schedule_standalone_work(dev, DSA_MC_ADD, addr, 0);
198}
199
200static int dsa_slave_unsync_mc(struct net_device *dev,
201 const unsigned char *addr)
202{
203 struct net_device *master = dsa_slave_to_master(dev);
204 struct dsa_port *dp = dsa_slave_to_port(dev);
205
206 dev_mc_del(master, addr);
207
208 if (!dsa_switch_supports_mc_filtering(dp->ds))
209 return 0;
210
211 return dsa_slave_schedule_standalone_work(dev, DSA_MC_DEL, addr, 0);
212}
213
214void dsa_slave_sync_ha(struct net_device *dev)
215{
216 struct dsa_port *dp = dsa_slave_to_port(dev);
217 struct dsa_switch *ds = dp->ds;
218 struct netdev_hw_addr *ha;
219
220 netif_addr_lock_bh(dev);
221
222 netdev_for_each_synced_mc_addr(ha, dev)
223 dsa_slave_sync_mc(dev, ha->addr);
224
225 netdev_for_each_synced_uc_addr(ha, dev)
226 dsa_slave_sync_uc(dev, ha->addr);
227
228 netif_addr_unlock_bh(dev);
229
230 if (dsa_switch_supports_uc_filtering(ds) ||
231 dsa_switch_supports_mc_filtering(ds))
232 dsa_flush_workqueue();
233}
234
235void dsa_slave_unsync_ha(struct net_device *dev)
236{
237 struct dsa_port *dp = dsa_slave_to_port(dev);
238 struct dsa_switch *ds = dp->ds;
239 struct netdev_hw_addr *ha;
240
241 netif_addr_lock_bh(dev);
242
243 netdev_for_each_synced_uc_addr(ha, dev)
244 dsa_slave_unsync_uc(dev, ha->addr);
245
246 netdev_for_each_synced_mc_addr(ha, dev)
247 dsa_slave_unsync_mc(dev, ha->addr);
248
249 netif_addr_unlock_bh(dev);
250
251 if (dsa_switch_supports_uc_filtering(ds) ||
252 dsa_switch_supports_mc_filtering(ds))
253 dsa_flush_workqueue();
254}
255
256/* slave mii_bus handling ***************************************************/
257static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
258{
259 struct dsa_switch *ds = bus->priv;
260
261 if (ds->phys_mii_mask & (1 << addr))
262 return ds->ops->phy_read(ds, addr, reg);
263
264 return 0xffff;
265}
266
267static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
268{
269 struct dsa_switch *ds = bus->priv;
270
271 if (ds->phys_mii_mask & (1 << addr))
272 return ds->ops->phy_write(ds, addr, reg, val);
273
274 return 0;
275}
276
277void dsa_slave_mii_bus_init(struct dsa_switch *ds)
278{
279 ds->slave_mii_bus->priv = (void *)ds;
280 ds->slave_mii_bus->name = "dsa slave smi";
281 ds->slave_mii_bus->read = dsa_slave_phy_read;
282 ds->slave_mii_bus->write = dsa_slave_phy_write;
283 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
284 ds->dst->index, ds->index);
285 ds->slave_mii_bus->parent = ds->dev;
286 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
287}
288
289
290/* slave device handling ****************************************************/
291static int dsa_slave_get_iflink(const struct net_device *dev)
292{
293 return dsa_slave_to_master(dev)->ifindex;
294}
295
296static int dsa_slave_open(struct net_device *dev)
297{
298 struct net_device *master = dsa_slave_to_master(dev);
299 struct dsa_port *dp = dsa_slave_to_port(dev);
300 struct dsa_switch *ds = dp->ds;
301 int err;
302
303 err = dev_open(master, NULL);
304 if (err < 0) {
305 netdev_err(dev, "failed to open master %s\n", master->name);
306 goto out;
307 }
308
309 if (dsa_switch_supports_uc_filtering(ds)) {
310 err = dsa_port_standalone_host_fdb_add(dp, dev->dev_addr, 0);
311 if (err)
312 goto out;
313 }
314
315 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
316 err = dev_uc_add(master, dev->dev_addr);
317 if (err < 0)
318 goto del_host_addr;
319 }
320
321 err = dsa_port_enable_rt(dp, dev->phydev);
322 if (err)
323 goto del_unicast;
324
325 return 0;
326
327del_unicast:
328 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
329 dev_uc_del(master, dev->dev_addr);
330del_host_addr:
331 if (dsa_switch_supports_uc_filtering(ds))
332 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
333out:
334 return err;
335}
336
337static int dsa_slave_close(struct net_device *dev)
338{
339 struct net_device *master = dsa_slave_to_master(dev);
340 struct dsa_port *dp = dsa_slave_to_port(dev);
341 struct dsa_switch *ds = dp->ds;
342
343 dsa_port_disable_rt(dp);
344
345 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
346 dev_uc_del(master, dev->dev_addr);
347
348 if (dsa_switch_supports_uc_filtering(ds))
349 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
350
351 return 0;
352}
353
354static void dsa_slave_manage_host_flood(struct net_device *dev)
355{
356 bool mc = dev->flags & (IFF_PROMISC | IFF_ALLMULTI);
357 struct dsa_port *dp = dsa_slave_to_port(dev);
358 bool uc = dev->flags & IFF_PROMISC;
359
360 dsa_port_set_host_flood(dp, uc, mc);
361}
362
363static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
364{
365 struct net_device *master = dsa_slave_to_master(dev);
366 struct dsa_port *dp = dsa_slave_to_port(dev);
367 struct dsa_switch *ds = dp->ds;
368
369 if (change & IFF_ALLMULTI)
370 dev_set_allmulti(master,
371 dev->flags & IFF_ALLMULTI ? 1 : -1);
372 if (change & IFF_PROMISC)
373 dev_set_promiscuity(master,
374 dev->flags & IFF_PROMISC ? 1 : -1);
375
376 if (dsa_switch_supports_uc_filtering(ds) &&
377 dsa_switch_supports_mc_filtering(ds))
378 dsa_slave_manage_host_flood(dev);
379}
380
381static void dsa_slave_set_rx_mode(struct net_device *dev)
382{
383 __dev_mc_sync(dev, dsa_slave_sync_mc, dsa_slave_unsync_mc);
384 __dev_uc_sync(dev, dsa_slave_sync_uc, dsa_slave_unsync_uc);
385}
386
387static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
388{
389 struct net_device *master = dsa_slave_to_master(dev);
390 struct dsa_port *dp = dsa_slave_to_port(dev);
391 struct dsa_switch *ds = dp->ds;
392 struct sockaddr *addr = a;
393 int err;
394
395 if (!is_valid_ether_addr(addr->sa_data))
396 return -EADDRNOTAVAIL;
397
398 /* If the port is down, the address isn't synced yet to hardware or
399 * to the DSA master, so there is nothing to change.
400 */
401 if (!(dev->flags & IFF_UP))
402 goto out_change_dev_addr;
403
404 if (dsa_switch_supports_uc_filtering(ds)) {
405 err = dsa_port_standalone_host_fdb_add(dp, addr->sa_data, 0);
406 if (err)
407 return err;
408 }
409
410 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
411 err = dev_uc_add(master, addr->sa_data);
412 if (err < 0)
413 goto del_unicast;
414 }
415
416 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
417 dev_uc_del(master, dev->dev_addr);
418
419 if (dsa_switch_supports_uc_filtering(ds))
420 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
421
422out_change_dev_addr:
423 eth_hw_addr_set(dev, addr->sa_data);
424
425 return 0;
426
427del_unicast:
428 if (dsa_switch_supports_uc_filtering(ds))
429 dsa_port_standalone_host_fdb_del(dp, addr->sa_data, 0);
430
431 return err;
432}
433
434struct dsa_slave_dump_ctx {
435 struct net_device *dev;
436 struct sk_buff *skb;
437 struct netlink_callback *cb;
438 int idx;
439};
440
441static int
442dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
443 bool is_static, void *data)
444{
445 struct dsa_slave_dump_ctx *dump = data;
446 u32 portid = NETLINK_CB(dump->cb->skb).portid;
447 u32 seq = dump->cb->nlh->nlmsg_seq;
448 struct nlmsghdr *nlh;
449 struct ndmsg *ndm;
450
451 if (dump->idx < dump->cb->args[2])
452 goto skip;
453
454 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
455 sizeof(*ndm), NLM_F_MULTI);
456 if (!nlh)
457 return -EMSGSIZE;
458
459 ndm = nlmsg_data(nlh);
460 ndm->ndm_family = AF_BRIDGE;
461 ndm->ndm_pad1 = 0;
462 ndm->ndm_pad2 = 0;
463 ndm->ndm_flags = NTF_SELF;
464 ndm->ndm_type = 0;
465 ndm->ndm_ifindex = dump->dev->ifindex;
466 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
467
468 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
469 goto nla_put_failure;
470
471 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
472 goto nla_put_failure;
473
474 nlmsg_end(dump->skb, nlh);
475
476skip:
477 dump->idx++;
478 return 0;
479
480nla_put_failure:
481 nlmsg_cancel(dump->skb, nlh);
482 return -EMSGSIZE;
483}
484
485static int
486dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
487 struct net_device *dev, struct net_device *filter_dev,
488 int *idx)
489{
490 struct dsa_port *dp = dsa_slave_to_port(dev);
491 struct dsa_slave_dump_ctx dump = {
492 .dev = dev,
493 .skb = skb,
494 .cb = cb,
495 .idx = *idx,
496 };
497 int err;
498
499 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
500 *idx = dump.idx;
501
502 return err;
503}
504
505static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
506{
507 struct dsa_slave_priv *p = netdev_priv(dev);
508 struct dsa_switch *ds = p->dp->ds;
509 int port = p->dp->index;
510
511 /* Pass through to switch driver if it supports timestamping */
512 switch (cmd) {
513 case SIOCGHWTSTAMP:
514 if (ds->ops->port_hwtstamp_get)
515 return ds->ops->port_hwtstamp_get(ds, port, ifr);
516 break;
517 case SIOCSHWTSTAMP:
518 if (ds->ops->port_hwtstamp_set)
519 return ds->ops->port_hwtstamp_set(ds, port, ifr);
520 break;
521 }
522
523 return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
524}
525
526static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx,
527 const struct switchdev_attr *attr,
528 struct netlink_ext_ack *extack)
529{
530 struct dsa_port *dp = dsa_slave_to_port(dev);
531 int ret;
532
533 if (ctx && ctx != dp)
534 return 0;
535
536 switch (attr->id) {
537 case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
538 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
539 return -EOPNOTSUPP;
540
541 ret = dsa_port_set_state(dp, attr->u.stp_state, true);
542 break;
543 case SWITCHDEV_ATTR_ID_PORT_MST_STATE:
544 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
545 return -EOPNOTSUPP;
546
547 ret = dsa_port_set_mst_state(dp, &attr->u.mst_state, extack);
548 break;
549 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
550 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
551 return -EOPNOTSUPP;
552
553 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
554 extack);
555 break;
556 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
557 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
558 return -EOPNOTSUPP;
559
560 ret = dsa_port_ageing_time(dp, attr->u.ageing_time);
561 break;
562 case SWITCHDEV_ATTR_ID_BRIDGE_MST:
563 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
564 return -EOPNOTSUPP;
565
566 ret = dsa_port_mst_enable(dp, attr->u.mst, extack);
567 break;
568 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
569 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
570 return -EOPNOTSUPP;
571
572 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
573 extack);
574 break;
575 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
576 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
577 return -EOPNOTSUPP;
578
579 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack);
580 break;
581 case SWITCHDEV_ATTR_ID_VLAN_MSTI:
582 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
583 return -EOPNOTSUPP;
584
585 ret = dsa_port_vlan_msti(dp, &attr->u.vlan_msti);
586 break;
587 default:
588 ret = -EOPNOTSUPP;
589 break;
590 }
591
592 return ret;
593}
594
595/* Must be called under rcu_read_lock() */
596static int
597dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave,
598 const struct switchdev_obj_port_vlan *vlan)
599{
600 struct net_device *upper_dev;
601 struct list_head *iter;
602
603 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
604 u16 vid;
605
606 if (!is_vlan_dev(upper_dev))
607 continue;
608
609 vid = vlan_dev_vlan_id(upper_dev);
610 if (vid == vlan->vid)
611 return -EBUSY;
612 }
613
614 return 0;
615}
616
617static int dsa_slave_vlan_add(struct net_device *dev,
618 const struct switchdev_obj *obj,
619 struct netlink_ext_ack *extack)
620{
621 struct dsa_port *dp = dsa_slave_to_port(dev);
622 struct switchdev_obj_port_vlan *vlan;
623 int err;
624
625 if (dsa_port_skip_vlan_configuration(dp)) {
626 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
627 return 0;
628 }
629
630 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
631
632 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with
633 * the same VID.
634 */
635 if (br_vlan_enabled(dsa_port_bridge_dev_get(dp))) {
636 rcu_read_lock();
637 err = dsa_slave_vlan_check_for_8021q_uppers(dev, vlan);
638 rcu_read_unlock();
639 if (err) {
640 NL_SET_ERR_MSG_MOD(extack,
641 "Port already has a VLAN upper with this VID");
642 return err;
643 }
644 }
645
646 return dsa_port_vlan_add(dp, vlan, extack);
647}
648
649/* Offload a VLAN installed on the bridge or on a foreign interface by
650 * installing it as a VLAN towards the CPU port.
651 */
652static int dsa_slave_host_vlan_add(struct net_device *dev,
653 const struct switchdev_obj *obj,
654 struct netlink_ext_ack *extack)
655{
656 struct dsa_port *dp = dsa_slave_to_port(dev);
657 struct switchdev_obj_port_vlan vlan;
658
659 /* Do nothing if this is a software bridge */
660 if (!dp->bridge)
661 return -EOPNOTSUPP;
662
663 if (dsa_port_skip_vlan_configuration(dp)) {
664 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
665 return 0;
666 }
667
668 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
669
670 /* Even though drivers often handle CPU membership in special ways,
671 * it doesn't make sense to program a PVID, so clear this flag.
672 */
673 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID;
674
675 return dsa_port_host_vlan_add(dp, &vlan, extack);
676}
677
678static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx,
679 const struct switchdev_obj *obj,
680 struct netlink_ext_ack *extack)
681{
682 struct dsa_port *dp = dsa_slave_to_port(dev);
683 int err;
684
685 if (ctx && ctx != dp)
686 return 0;
687
688 switch (obj->id) {
689 case SWITCHDEV_OBJ_ID_PORT_MDB:
690 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
691 return -EOPNOTSUPP;
692
693 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
694 break;
695 case SWITCHDEV_OBJ_ID_HOST_MDB:
696 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
697 return -EOPNOTSUPP;
698
699 err = dsa_port_bridge_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
700 break;
701 case SWITCHDEV_OBJ_ID_PORT_VLAN:
702 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev))
703 err = dsa_slave_vlan_add(dev, obj, extack);
704 else
705 err = dsa_slave_host_vlan_add(dev, obj, extack);
706 break;
707 case SWITCHDEV_OBJ_ID_MRP:
708 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
709 return -EOPNOTSUPP;
710
711 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj));
712 break;
713 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
714 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
715 return -EOPNOTSUPP;
716
717 err = dsa_port_mrp_add_ring_role(dp,
718 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
719 break;
720 default:
721 err = -EOPNOTSUPP;
722 break;
723 }
724
725 return err;
726}
727
728static int dsa_slave_vlan_del(struct net_device *dev,
729 const struct switchdev_obj *obj)
730{
731 struct dsa_port *dp = dsa_slave_to_port(dev);
732 struct switchdev_obj_port_vlan *vlan;
733
734 if (dsa_port_skip_vlan_configuration(dp))
735 return 0;
736
737 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
738
739 return dsa_port_vlan_del(dp, vlan);
740}
741
742static int dsa_slave_host_vlan_del(struct net_device *dev,
743 const struct switchdev_obj *obj)
744{
745 struct dsa_port *dp = dsa_slave_to_port(dev);
746 struct switchdev_obj_port_vlan *vlan;
747
748 /* Do nothing if this is a software bridge */
749 if (!dp->bridge)
750 return -EOPNOTSUPP;
751
752 if (dsa_port_skip_vlan_configuration(dp))
753 return 0;
754
755 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
756
757 return dsa_port_host_vlan_del(dp, vlan);
758}
759
760static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx,
761 const struct switchdev_obj *obj)
762{
763 struct dsa_port *dp = dsa_slave_to_port(dev);
764 int err;
765
766 if (ctx && ctx != dp)
767 return 0;
768
769 switch (obj->id) {
770 case SWITCHDEV_OBJ_ID_PORT_MDB:
771 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
772 return -EOPNOTSUPP;
773
774 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
775 break;
776 case SWITCHDEV_OBJ_ID_HOST_MDB:
777 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
778 return -EOPNOTSUPP;
779
780 err = dsa_port_bridge_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
781 break;
782 case SWITCHDEV_OBJ_ID_PORT_VLAN:
783 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev))
784 err = dsa_slave_vlan_del(dev, obj);
785 else
786 err = dsa_slave_host_vlan_del(dev, obj);
787 break;
788 case SWITCHDEV_OBJ_ID_MRP:
789 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
790 return -EOPNOTSUPP;
791
792 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj));
793 break;
794 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP:
795 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
796 return -EOPNOTSUPP;
797
798 err = dsa_port_mrp_del_ring_role(dp,
799 SWITCHDEV_OBJ_RING_ROLE_MRP(obj));
800 break;
801 default:
802 err = -EOPNOTSUPP;
803 break;
804 }
805
806 return err;
807}
808
809static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
810 struct sk_buff *skb)
811{
812#ifdef CONFIG_NET_POLL_CONTROLLER
813 struct dsa_slave_priv *p = netdev_priv(dev);
814
815 return netpoll_send_skb(p->netpoll, skb);
816#else
817 BUG();
818 return NETDEV_TX_OK;
819#endif
820}
821
822static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
823 struct sk_buff *skb)
824{
825 struct dsa_switch *ds = p->dp->ds;
826
827 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
828 return;
829
830 if (!ds->ops->port_txtstamp)
831 return;
832
833 ds->ops->port_txtstamp(ds, p->dp->index, skb);
834}
835
836netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
837{
838 /* SKB for netpoll still need to be mangled with the protocol-specific
839 * tag to be successfully transmitted
840 */
841 if (unlikely(netpoll_tx_running(dev)))
842 return dsa_slave_netpoll_send_skb(dev, skb);
843
844 /* Queue the SKB for transmission on the parent interface, but
845 * do not modify its EtherType
846 */
847 skb->dev = dsa_slave_to_master(dev);
848 dev_queue_xmit(skb);
849
850 return NETDEV_TX_OK;
851}
852EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
853
854static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev)
855{
856 int needed_headroom = dev->needed_headroom;
857 int needed_tailroom = dev->needed_tailroom;
858
859 /* For tail taggers, we need to pad short frames ourselves, to ensure
860 * that the tail tag does not fail at its role of being at the end of
861 * the packet, once the master interface pads the frame. Account for
862 * that pad length here, and pad later.
863 */
864 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN))
865 needed_tailroom += ETH_ZLEN - skb->len;
866 /* skb_headroom() returns unsigned int... */
867 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0);
868 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0);
869
870 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb)))
871 /* No reallocation needed, yay! */
872 return 0;
873
874 return pskb_expand_head(skb, needed_headroom, needed_tailroom,
875 GFP_ATOMIC);
876}
877
878static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
879{
880 struct dsa_slave_priv *p = netdev_priv(dev);
881 struct sk_buff *nskb;
882
883 dev_sw_netstats_tx_add(dev, 1, skb->len);
884
885 memset(skb->cb, 0, sizeof(skb->cb));
886
887 /* Handle tx timestamp if any */
888 dsa_skb_tx_timestamp(p, skb);
889
890 if (dsa_realloc_skb(skb, dev)) {
891 dev_kfree_skb_any(skb);
892 return NETDEV_TX_OK;
893 }
894
895 /* needed_tailroom should still be 'warm' in the cache line from
896 * dsa_realloc_skb(), which has also ensured that padding is safe.
897 */
898 if (dev->needed_tailroom)
899 eth_skb_pad(skb);
900
901 /* Transmit function may have to reallocate the original SKB,
902 * in which case it must have freed it. Only free it here on error.
903 */
904 nskb = p->xmit(skb, dev);
905 if (!nskb) {
906 kfree_skb(skb);
907 return NETDEV_TX_OK;
908 }
909
910 return dsa_enqueue_skb(nskb, dev);
911}
912
913/* ethtool operations *******************************************************/
914
915static void dsa_slave_get_drvinfo(struct net_device *dev,
916 struct ethtool_drvinfo *drvinfo)
917{
918 strscpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
919 strscpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
920 strscpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
921}
922
923static int dsa_slave_get_regs_len(struct net_device *dev)
924{
925 struct dsa_port *dp = dsa_slave_to_port(dev);
926 struct dsa_switch *ds = dp->ds;
927
928 if (ds->ops->get_regs_len)
929 return ds->ops->get_regs_len(ds, dp->index);
930
931 return -EOPNOTSUPP;
932}
933
934static void
935dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
936{
937 struct dsa_port *dp = dsa_slave_to_port(dev);
938 struct dsa_switch *ds = dp->ds;
939
940 if (ds->ops->get_regs)
941 ds->ops->get_regs(ds, dp->index, regs, _p);
942}
943
944static int dsa_slave_nway_reset(struct net_device *dev)
945{
946 struct dsa_port *dp = dsa_slave_to_port(dev);
947
948 return phylink_ethtool_nway_reset(dp->pl);
949}
950
951static int dsa_slave_get_eeprom_len(struct net_device *dev)
952{
953 struct dsa_port *dp = dsa_slave_to_port(dev);
954 struct dsa_switch *ds = dp->ds;
955
956 if (ds->cd && ds->cd->eeprom_len)
957 return ds->cd->eeprom_len;
958
959 if (ds->ops->get_eeprom_len)
960 return ds->ops->get_eeprom_len(ds);
961
962 return 0;
963}
964
965static int dsa_slave_get_eeprom(struct net_device *dev,
966 struct ethtool_eeprom *eeprom, u8 *data)
967{
968 struct dsa_port *dp = dsa_slave_to_port(dev);
969 struct dsa_switch *ds = dp->ds;
970
971 if (ds->ops->get_eeprom)
972 return ds->ops->get_eeprom(ds, eeprom, data);
973
974 return -EOPNOTSUPP;
975}
976
977static int dsa_slave_set_eeprom(struct net_device *dev,
978 struct ethtool_eeprom *eeprom, u8 *data)
979{
980 struct dsa_port *dp = dsa_slave_to_port(dev);
981 struct dsa_switch *ds = dp->ds;
982
983 if (ds->ops->set_eeprom)
984 return ds->ops->set_eeprom(ds, eeprom, data);
985
986 return -EOPNOTSUPP;
987}
988
989static void dsa_slave_get_strings(struct net_device *dev,
990 uint32_t stringset, uint8_t *data)
991{
992 struct dsa_port *dp = dsa_slave_to_port(dev);
993 struct dsa_switch *ds = dp->ds;
994
995 if (stringset == ETH_SS_STATS) {
996 int len = ETH_GSTRING_LEN;
997
998 strncpy(data, "tx_packets", len);
999 strncpy(data + len, "tx_bytes", len);
1000 strncpy(data + 2 * len, "rx_packets", len);
1001 strncpy(data + 3 * len, "rx_bytes", len);
1002 if (ds->ops->get_strings)
1003 ds->ops->get_strings(ds, dp->index, stringset,
1004 data + 4 * len);
1005 } else if (stringset == ETH_SS_TEST) {
1006 net_selftest_get_strings(data);
1007 }
1008
1009}
1010
1011static void dsa_slave_get_ethtool_stats(struct net_device *dev,
1012 struct ethtool_stats *stats,
1013 uint64_t *data)
1014{
1015 struct dsa_port *dp = dsa_slave_to_port(dev);
1016 struct dsa_switch *ds = dp->ds;
1017 struct pcpu_sw_netstats *s;
1018 unsigned int start;
1019 int i;
1020
1021 for_each_possible_cpu(i) {
1022 u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
1023
1024 s = per_cpu_ptr(dev->tstats, i);
1025 do {
1026 start = u64_stats_fetch_begin(&s->syncp);
1027 tx_packets = u64_stats_read(&s->tx_packets);
1028 tx_bytes = u64_stats_read(&s->tx_bytes);
1029 rx_packets = u64_stats_read(&s->rx_packets);
1030 rx_bytes = u64_stats_read(&s->rx_bytes);
1031 } while (u64_stats_fetch_retry(&s->syncp, start));
1032 data[0] += tx_packets;
1033 data[1] += tx_bytes;
1034 data[2] += rx_packets;
1035 data[3] += rx_bytes;
1036 }
1037 if (ds->ops->get_ethtool_stats)
1038 ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
1039}
1040
1041static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
1042{
1043 struct dsa_port *dp = dsa_slave_to_port(dev);
1044 struct dsa_switch *ds = dp->ds;
1045
1046 if (sset == ETH_SS_STATS) {
1047 int count = 0;
1048
1049 if (ds->ops->get_sset_count) {
1050 count = ds->ops->get_sset_count(ds, dp->index, sset);
1051 if (count < 0)
1052 return count;
1053 }
1054
1055 return count + 4;
1056 } else if (sset == ETH_SS_TEST) {
1057 return net_selftest_get_count();
1058 }
1059
1060 return -EOPNOTSUPP;
1061}
1062
1063static void dsa_slave_get_eth_phy_stats(struct net_device *dev,
1064 struct ethtool_eth_phy_stats *phy_stats)
1065{
1066 struct dsa_port *dp = dsa_slave_to_port(dev);
1067 struct dsa_switch *ds = dp->ds;
1068
1069 if (ds->ops->get_eth_phy_stats)
1070 ds->ops->get_eth_phy_stats(ds, dp->index, phy_stats);
1071}
1072
1073static void dsa_slave_get_eth_mac_stats(struct net_device *dev,
1074 struct ethtool_eth_mac_stats *mac_stats)
1075{
1076 struct dsa_port *dp = dsa_slave_to_port(dev);
1077 struct dsa_switch *ds = dp->ds;
1078
1079 if (ds->ops->get_eth_mac_stats)
1080 ds->ops->get_eth_mac_stats(ds, dp->index, mac_stats);
1081}
1082
1083static void
1084dsa_slave_get_eth_ctrl_stats(struct net_device *dev,
1085 struct ethtool_eth_ctrl_stats *ctrl_stats)
1086{
1087 struct dsa_port *dp = dsa_slave_to_port(dev);
1088 struct dsa_switch *ds = dp->ds;
1089
1090 if (ds->ops->get_eth_ctrl_stats)
1091 ds->ops->get_eth_ctrl_stats(ds, dp->index, ctrl_stats);
1092}
1093
1094static void
1095dsa_slave_get_rmon_stats(struct net_device *dev,
1096 struct ethtool_rmon_stats *rmon_stats,
1097 const struct ethtool_rmon_hist_range **ranges)
1098{
1099 struct dsa_port *dp = dsa_slave_to_port(dev);
1100 struct dsa_switch *ds = dp->ds;
1101
1102 if (ds->ops->get_rmon_stats)
1103 ds->ops->get_rmon_stats(ds, dp->index, rmon_stats, ranges);
1104}
1105
1106static void dsa_slave_net_selftest(struct net_device *ndev,
1107 struct ethtool_test *etest, u64 *buf)
1108{
1109 struct dsa_port *dp = dsa_slave_to_port(ndev);
1110 struct dsa_switch *ds = dp->ds;
1111
1112 if (ds->ops->self_test) {
1113 ds->ops->self_test(ds, dp->index, etest, buf);
1114 return;
1115 }
1116
1117 net_selftest(ndev, etest, buf);
1118}
1119
1120static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
1121{
1122 struct dsa_port *dp = dsa_slave_to_port(dev);
1123 struct dsa_switch *ds = dp->ds;
1124
1125 phylink_ethtool_get_wol(dp->pl, w);
1126
1127 if (ds->ops->get_wol)
1128 ds->ops->get_wol(ds, dp->index, w);
1129}
1130
1131static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
1132{
1133 struct dsa_port *dp = dsa_slave_to_port(dev);
1134 struct dsa_switch *ds = dp->ds;
1135 int ret = -EOPNOTSUPP;
1136
1137 phylink_ethtool_set_wol(dp->pl, w);
1138
1139 if (ds->ops->set_wol)
1140 ret = ds->ops->set_wol(ds, dp->index, w);
1141
1142 return ret;
1143}
1144
1145static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
1146{
1147 struct dsa_port *dp = dsa_slave_to_port(dev);
1148 struct dsa_switch *ds = dp->ds;
1149 int ret;
1150
1151 /* Port's PHY and MAC both need to be EEE capable */
1152 if (!dev->phydev || !dp->pl)
1153 return -ENODEV;
1154
1155 if (!ds->ops->set_mac_eee)
1156 return -EOPNOTSUPP;
1157
1158 ret = ds->ops->set_mac_eee(ds, dp->index, e);
1159 if (ret)
1160 return ret;
1161
1162 return phylink_ethtool_set_eee(dp->pl, e);
1163}
1164
1165static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
1166{
1167 struct dsa_port *dp = dsa_slave_to_port(dev);
1168 struct dsa_switch *ds = dp->ds;
1169 int ret;
1170
1171 /* Port's PHY and MAC both need to be EEE capable */
1172 if (!dev->phydev || !dp->pl)
1173 return -ENODEV;
1174
1175 if (!ds->ops->get_mac_eee)
1176 return -EOPNOTSUPP;
1177
1178 ret = ds->ops->get_mac_eee(ds, dp->index, e);
1179 if (ret)
1180 return ret;
1181
1182 return phylink_ethtool_get_eee(dp->pl, e);
1183}
1184
1185static int dsa_slave_get_link_ksettings(struct net_device *dev,
1186 struct ethtool_link_ksettings *cmd)
1187{
1188 struct dsa_port *dp = dsa_slave_to_port(dev);
1189
1190 return phylink_ethtool_ksettings_get(dp->pl, cmd);
1191}
1192
1193static int dsa_slave_set_link_ksettings(struct net_device *dev,
1194 const struct ethtool_link_ksettings *cmd)
1195{
1196 struct dsa_port *dp = dsa_slave_to_port(dev);
1197
1198 return phylink_ethtool_ksettings_set(dp->pl, cmd);
1199}
1200
1201static void dsa_slave_get_pause_stats(struct net_device *dev,
1202 struct ethtool_pause_stats *pause_stats)
1203{
1204 struct dsa_port *dp = dsa_slave_to_port(dev);
1205 struct dsa_switch *ds = dp->ds;
1206
1207 if (ds->ops->get_pause_stats)
1208 ds->ops->get_pause_stats(ds, dp->index, pause_stats);
1209}
1210
1211static void dsa_slave_get_pauseparam(struct net_device *dev,
1212 struct ethtool_pauseparam *pause)
1213{
1214 struct dsa_port *dp = dsa_slave_to_port(dev);
1215
1216 phylink_ethtool_get_pauseparam(dp->pl, pause);
1217}
1218
1219static int dsa_slave_set_pauseparam(struct net_device *dev,
1220 struct ethtool_pauseparam *pause)
1221{
1222 struct dsa_port *dp = dsa_slave_to_port(dev);
1223
1224 return phylink_ethtool_set_pauseparam(dp->pl, pause);
1225}
1226
1227#ifdef CONFIG_NET_POLL_CONTROLLER
1228static int dsa_slave_netpoll_setup(struct net_device *dev,
1229 struct netpoll_info *ni)
1230{
1231 struct net_device *master = dsa_slave_to_master(dev);
1232 struct dsa_slave_priv *p = netdev_priv(dev);
1233 struct netpoll *netpoll;
1234 int err = 0;
1235
1236 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
1237 if (!netpoll)
1238 return -ENOMEM;
1239
1240 err = __netpoll_setup(netpoll, master);
1241 if (err) {
1242 kfree(netpoll);
1243 goto out;
1244 }
1245
1246 p->netpoll = netpoll;
1247out:
1248 return err;
1249}
1250
1251static void dsa_slave_netpoll_cleanup(struct net_device *dev)
1252{
1253 struct dsa_slave_priv *p = netdev_priv(dev);
1254 struct netpoll *netpoll = p->netpoll;
1255
1256 if (!netpoll)
1257 return;
1258
1259 p->netpoll = NULL;
1260
1261 __netpoll_free(netpoll);
1262}
1263
1264static void dsa_slave_poll_controller(struct net_device *dev)
1265{
1266}
1267#endif
1268
1269static struct dsa_mall_tc_entry *
1270dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
1271{
1272 struct dsa_slave_priv *p = netdev_priv(dev);
1273 struct dsa_mall_tc_entry *mall_tc_entry;
1274
1275 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
1276 if (mall_tc_entry->cookie == cookie)
1277 return mall_tc_entry;
1278
1279 return NULL;
1280}
1281
1282static int
1283dsa_slave_add_cls_matchall_mirred(struct net_device *dev,
1284 struct tc_cls_matchall_offload *cls,
1285 bool ingress)
1286{
1287 struct netlink_ext_ack *extack = cls->common.extack;
1288 struct dsa_port *dp = dsa_slave_to_port(dev);
1289 struct dsa_slave_priv *p = netdev_priv(dev);
1290 struct dsa_mall_mirror_tc_entry *mirror;
1291 struct dsa_mall_tc_entry *mall_tc_entry;
1292 struct dsa_switch *ds = dp->ds;
1293 struct flow_action_entry *act;
1294 struct dsa_port *to_dp;
1295 int err;
1296
1297 if (!ds->ops->port_mirror_add)
1298 return -EOPNOTSUPP;
1299
1300 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
1301 cls->common.extack))
1302 return -EOPNOTSUPP;
1303
1304 act = &cls->rule->action.entries[0];
1305
1306 if (!act->dev)
1307 return -EINVAL;
1308
1309 if (!dsa_slave_dev_check(act->dev))
1310 return -EOPNOTSUPP;
1311
1312 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1313 if (!mall_tc_entry)
1314 return -ENOMEM;
1315
1316 mall_tc_entry->cookie = cls->cookie;
1317 mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
1318 mirror = &mall_tc_entry->mirror;
1319
1320 to_dp = dsa_slave_to_port(act->dev);
1321
1322 mirror->to_local_port = to_dp->index;
1323 mirror->ingress = ingress;
1324
1325 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack);
1326 if (err) {
1327 kfree(mall_tc_entry);
1328 return err;
1329 }
1330
1331 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1332
1333 return err;
1334}
1335
1336static int
1337dsa_slave_add_cls_matchall_police(struct net_device *dev,
1338 struct tc_cls_matchall_offload *cls,
1339 bool ingress)
1340{
1341 struct netlink_ext_ack *extack = cls->common.extack;
1342 struct dsa_port *dp = dsa_slave_to_port(dev);
1343 struct dsa_slave_priv *p = netdev_priv(dev);
1344 struct dsa_mall_policer_tc_entry *policer;
1345 struct dsa_mall_tc_entry *mall_tc_entry;
1346 struct dsa_switch *ds = dp->ds;
1347 struct flow_action_entry *act;
1348 int err;
1349
1350 if (!ds->ops->port_policer_add) {
1351 NL_SET_ERR_MSG_MOD(extack,
1352 "Policing offload not implemented");
1353 return -EOPNOTSUPP;
1354 }
1355
1356 if (!ingress) {
1357 NL_SET_ERR_MSG_MOD(extack,
1358 "Only supported on ingress qdisc");
1359 return -EOPNOTSUPP;
1360 }
1361
1362 if (!flow_action_basic_hw_stats_check(&cls->rule->action,
1363 cls->common.extack))
1364 return -EOPNOTSUPP;
1365
1366 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) {
1367 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) {
1368 NL_SET_ERR_MSG_MOD(extack,
1369 "Only one port policer allowed");
1370 return -EEXIST;
1371 }
1372 }
1373
1374 act = &cls->rule->action.entries[0];
1375
1376 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
1377 if (!mall_tc_entry)
1378 return -ENOMEM;
1379
1380 mall_tc_entry->cookie = cls->cookie;
1381 mall_tc_entry->type = DSA_PORT_MALL_POLICER;
1382 policer = &mall_tc_entry->policer;
1383 policer->rate_bytes_per_sec = act->police.rate_bytes_ps;
1384 policer->burst = act->police.burst;
1385
1386 err = ds->ops->port_policer_add(ds, dp->index, policer);
1387 if (err) {
1388 kfree(mall_tc_entry);
1389 return err;
1390 }
1391
1392 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
1393
1394 return err;
1395}
1396
1397static int dsa_slave_add_cls_matchall(struct net_device *dev,
1398 struct tc_cls_matchall_offload *cls,
1399 bool ingress)
1400{
1401 int err = -EOPNOTSUPP;
1402
1403 if (cls->common.protocol == htons(ETH_P_ALL) &&
1404 flow_offload_has_one_action(&cls->rule->action) &&
1405 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED)
1406 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress);
1407 else if (flow_offload_has_one_action(&cls->rule->action) &&
1408 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE)
1409 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress);
1410
1411 return err;
1412}
1413
1414static void dsa_slave_del_cls_matchall(struct net_device *dev,
1415 struct tc_cls_matchall_offload *cls)
1416{
1417 struct dsa_port *dp = dsa_slave_to_port(dev);
1418 struct dsa_mall_tc_entry *mall_tc_entry;
1419 struct dsa_switch *ds = dp->ds;
1420
1421 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
1422 if (!mall_tc_entry)
1423 return;
1424
1425 list_del(&mall_tc_entry->list);
1426
1427 switch (mall_tc_entry->type) {
1428 case DSA_PORT_MALL_MIRROR:
1429 if (ds->ops->port_mirror_del)
1430 ds->ops->port_mirror_del(ds, dp->index,
1431 &mall_tc_entry->mirror);
1432 break;
1433 case DSA_PORT_MALL_POLICER:
1434 if (ds->ops->port_policer_del)
1435 ds->ops->port_policer_del(ds, dp->index);
1436 break;
1437 default:
1438 WARN_ON(1);
1439 }
1440
1441 kfree(mall_tc_entry);
1442}
1443
1444static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
1445 struct tc_cls_matchall_offload *cls,
1446 bool ingress)
1447{
1448 if (cls->common.chain_index)
1449 return -EOPNOTSUPP;
1450
1451 switch (cls->command) {
1452 case TC_CLSMATCHALL_REPLACE:
1453 return dsa_slave_add_cls_matchall(dev, cls, ingress);
1454 case TC_CLSMATCHALL_DESTROY:
1455 dsa_slave_del_cls_matchall(dev, cls);
1456 return 0;
1457 default:
1458 return -EOPNOTSUPP;
1459 }
1460}
1461
1462static int dsa_slave_add_cls_flower(struct net_device *dev,
1463 struct flow_cls_offload *cls,
1464 bool ingress)
1465{
1466 struct dsa_port *dp = dsa_slave_to_port(dev);
1467 struct dsa_switch *ds = dp->ds;
1468 int port = dp->index;
1469
1470 if (!ds->ops->cls_flower_add)
1471 return -EOPNOTSUPP;
1472
1473 return ds->ops->cls_flower_add(ds, port, cls, ingress);
1474}
1475
1476static int dsa_slave_del_cls_flower(struct net_device *dev,
1477 struct flow_cls_offload *cls,
1478 bool ingress)
1479{
1480 struct dsa_port *dp = dsa_slave_to_port(dev);
1481 struct dsa_switch *ds = dp->ds;
1482 int port = dp->index;
1483
1484 if (!ds->ops->cls_flower_del)
1485 return -EOPNOTSUPP;
1486
1487 return ds->ops->cls_flower_del(ds, port, cls, ingress);
1488}
1489
1490static int dsa_slave_stats_cls_flower(struct net_device *dev,
1491 struct flow_cls_offload *cls,
1492 bool ingress)
1493{
1494 struct dsa_port *dp = dsa_slave_to_port(dev);
1495 struct dsa_switch *ds = dp->ds;
1496 int port = dp->index;
1497
1498 if (!ds->ops->cls_flower_stats)
1499 return -EOPNOTSUPP;
1500
1501 return ds->ops->cls_flower_stats(ds, port, cls, ingress);
1502}
1503
1504static int dsa_slave_setup_tc_cls_flower(struct net_device *dev,
1505 struct flow_cls_offload *cls,
1506 bool ingress)
1507{
1508 switch (cls->command) {
1509 case FLOW_CLS_REPLACE:
1510 return dsa_slave_add_cls_flower(dev, cls, ingress);
1511 case FLOW_CLS_DESTROY:
1512 return dsa_slave_del_cls_flower(dev, cls, ingress);
1513 case FLOW_CLS_STATS:
1514 return dsa_slave_stats_cls_flower(dev, cls, ingress);
1515 default:
1516 return -EOPNOTSUPP;
1517 }
1518}
1519
1520static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
1521 void *cb_priv, bool ingress)
1522{
1523 struct net_device *dev = cb_priv;
1524
1525 if (!tc_can_offload(dev))
1526 return -EOPNOTSUPP;
1527
1528 switch (type) {
1529 case TC_SETUP_CLSMATCHALL:
1530 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
1531 case TC_SETUP_CLSFLOWER:
1532 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress);
1533 default:
1534 return -EOPNOTSUPP;
1535 }
1536}
1537
1538static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
1539 void *type_data, void *cb_priv)
1540{
1541 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
1542}
1543
1544static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
1545 void *type_data, void *cb_priv)
1546{
1547 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
1548}
1549
1550static LIST_HEAD(dsa_slave_block_cb_list);
1551
1552static int dsa_slave_setup_tc_block(struct net_device *dev,
1553 struct flow_block_offload *f)
1554{
1555 struct flow_block_cb *block_cb;
1556 flow_setup_cb_t *cb;
1557
1558 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
1559 cb = dsa_slave_setup_tc_block_cb_ig;
1560 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
1561 cb = dsa_slave_setup_tc_block_cb_eg;
1562 else
1563 return -EOPNOTSUPP;
1564
1565 f->driver_block_list = &dsa_slave_block_cb_list;
1566
1567 switch (f->command) {
1568 case FLOW_BLOCK_BIND:
1569 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
1570 return -EBUSY;
1571
1572 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
1573 if (IS_ERR(block_cb))
1574 return PTR_ERR(block_cb);
1575
1576 flow_block_cb_add(block_cb, f);
1577 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
1578 return 0;
1579 case FLOW_BLOCK_UNBIND:
1580 block_cb = flow_block_cb_lookup(f->block, cb, dev);
1581 if (!block_cb)
1582 return -ENOENT;
1583
1584 flow_block_cb_remove(block_cb, f);
1585 list_del(&block_cb->driver_list);
1586 return 0;
1587 default:
1588 return -EOPNOTSUPP;
1589 }
1590}
1591
1592static int dsa_slave_setup_ft_block(struct dsa_switch *ds, int port,
1593 void *type_data)
1594{
1595 struct net_device *master = dsa_port_to_master(dsa_to_port(ds, port));
1596
1597 if (!master->netdev_ops->ndo_setup_tc)
1598 return -EOPNOTSUPP;
1599
1600 return master->netdev_ops->ndo_setup_tc(master, TC_SETUP_FT, type_data);
1601}
1602
1603static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
1604 void *type_data)
1605{
1606 struct dsa_port *dp = dsa_slave_to_port(dev);
1607 struct dsa_switch *ds = dp->ds;
1608
1609 switch (type) {
1610 case TC_SETUP_BLOCK:
1611 return dsa_slave_setup_tc_block(dev, type_data);
1612 case TC_SETUP_FT:
1613 return dsa_slave_setup_ft_block(ds, dp->index, type_data);
1614 default:
1615 break;
1616 }
1617
1618 if (!ds->ops->port_setup_tc)
1619 return -EOPNOTSUPP;
1620
1621 return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
1622}
1623
1624static int dsa_slave_get_rxnfc(struct net_device *dev,
1625 struct ethtool_rxnfc *nfc, u32 *rule_locs)
1626{
1627 struct dsa_port *dp = dsa_slave_to_port(dev);
1628 struct dsa_switch *ds = dp->ds;
1629
1630 if (!ds->ops->get_rxnfc)
1631 return -EOPNOTSUPP;
1632
1633 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
1634}
1635
1636static int dsa_slave_set_rxnfc(struct net_device *dev,
1637 struct ethtool_rxnfc *nfc)
1638{
1639 struct dsa_port *dp = dsa_slave_to_port(dev);
1640 struct dsa_switch *ds = dp->ds;
1641
1642 if (!ds->ops->set_rxnfc)
1643 return -EOPNOTSUPP;
1644
1645 return ds->ops->set_rxnfc(ds, dp->index, nfc);
1646}
1647
1648static int dsa_slave_get_ts_info(struct net_device *dev,
1649 struct ethtool_ts_info *ts)
1650{
1651 struct dsa_slave_priv *p = netdev_priv(dev);
1652 struct dsa_switch *ds = p->dp->ds;
1653
1654 if (!ds->ops->get_ts_info)
1655 return -EOPNOTSUPP;
1656
1657 return ds->ops->get_ts_info(ds, p->dp->index, ts);
1658}
1659
1660static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
1661 u16 vid)
1662{
1663 struct dsa_port *dp = dsa_slave_to_port(dev);
1664 struct switchdev_obj_port_vlan vlan = {
1665 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
1666 .vid = vid,
1667 /* This API only allows programming tagged, non-PVID VIDs */
1668 .flags = 0,
1669 };
1670 struct netlink_ext_ack extack = {0};
1671 int ret;
1672
1673 /* User port... */
1674 ret = dsa_port_vlan_add(dp, &vlan, &extack);
1675 if (ret) {
1676 if (extack._msg)
1677 netdev_err(dev, "%s\n", extack._msg);
1678 return ret;
1679 }
1680
1681 /* And CPU port... */
1682 ret = dsa_port_host_vlan_add(dp, &vlan, &extack);
1683 if (ret) {
1684 if (extack._msg)
1685 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index,
1686 extack._msg);
1687 return ret;
1688 }
1689
1690 return 0;
1691}
1692
1693static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
1694 u16 vid)
1695{
1696 struct dsa_port *dp = dsa_slave_to_port(dev);
1697 struct switchdev_obj_port_vlan vlan = {
1698 .vid = vid,
1699 /* This API only allows programming tagged, non-PVID VIDs */
1700 .flags = 0,
1701 };
1702 int err;
1703
1704 err = dsa_port_vlan_del(dp, &vlan);
1705 if (err)
1706 return err;
1707
1708 return dsa_port_host_vlan_del(dp, &vlan);
1709}
1710
1711static int dsa_slave_restore_vlan(struct net_device *vdev, int vid, void *arg)
1712{
1713 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q);
1714
1715 return dsa_slave_vlan_rx_add_vid(arg, proto, vid);
1716}
1717
1718static int dsa_slave_clear_vlan(struct net_device *vdev, int vid, void *arg)
1719{
1720 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q);
1721
1722 return dsa_slave_vlan_rx_kill_vid(arg, proto, vid);
1723}
1724
1725/* Keep the VLAN RX filtering list in sync with the hardware only if VLAN
1726 * filtering is enabled. The baseline is that only ports that offload a
1727 * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware,
1728 * but there are exceptions for quirky hardware.
1729 *
1730 * If ds->vlan_filtering_is_global = true, then standalone ports which share
1731 * the same switch with other ports that offload a VLAN-aware bridge are also
1732 * inevitably VLAN-aware.
1733 *
1734 * To summarize, a DSA switch port offloads:
1735 *
1736 * - If standalone (this includes software bridge, software LAG):
1737 * - if ds->needs_standalone_vlan_filtering = true, OR if
1738 * (ds->vlan_filtering_is_global = true AND there are bridges spanning
1739 * this switch chip which have vlan_filtering=1)
1740 * - the 8021q upper VLANs
1741 * - else (standalone VLAN filtering is not needed, VLAN filtering is not
1742 * global, or it is, but no port is under a VLAN-aware bridge):
1743 * - no VLAN (any 8021q upper is a software VLAN)
1744 *
1745 * - If under a vlan_filtering=0 bridge which it offload:
1746 * - if ds->configure_vlan_while_not_filtering = true (default):
1747 * - the bridge VLANs. These VLANs are committed to hardware but inactive.
1748 * - else (deprecated):
1749 * - no VLAN. The bridge VLANs are not restored when VLAN awareness is
1750 * enabled, so this behavior is broken and discouraged.
1751 *
1752 * - If under a vlan_filtering=1 bridge which it offload:
1753 * - the bridge VLANs
1754 * - the 8021q upper VLANs
1755 */
1756int dsa_slave_manage_vlan_filtering(struct net_device *slave,
1757 bool vlan_filtering)
1758{
1759 int err;
1760
1761 if (vlan_filtering) {
1762 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1763
1764 err = vlan_for_each(slave, dsa_slave_restore_vlan, slave);
1765 if (err) {
1766 vlan_for_each(slave, dsa_slave_clear_vlan, slave);
1767 slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
1768 return err;
1769 }
1770 } else {
1771 err = vlan_for_each(slave, dsa_slave_clear_vlan, slave);
1772 if (err)
1773 return err;
1774
1775 slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
1776 }
1777
1778 return 0;
1779}
1780
1781struct dsa_hw_port {
1782 struct list_head list;
1783 struct net_device *dev;
1784 int old_mtu;
1785};
1786
1787static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu)
1788{
1789 const struct dsa_hw_port *p;
1790 int err;
1791
1792 list_for_each_entry(p, hw_port_list, list) {
1793 if (p->dev->mtu == mtu)
1794 continue;
1795
1796 err = dev_set_mtu(p->dev, mtu);
1797 if (err)
1798 goto rollback;
1799 }
1800
1801 return 0;
1802
1803rollback:
1804 list_for_each_entry_continue_reverse(p, hw_port_list, list) {
1805 if (p->dev->mtu == p->old_mtu)
1806 continue;
1807
1808 if (dev_set_mtu(p->dev, p->old_mtu))
1809 netdev_err(p->dev, "Failed to restore MTU\n");
1810 }
1811
1812 return err;
1813}
1814
1815static void dsa_hw_port_list_free(struct list_head *hw_port_list)
1816{
1817 struct dsa_hw_port *p, *n;
1818
1819 list_for_each_entry_safe(p, n, hw_port_list, list)
1820 kfree(p);
1821}
1822
1823/* Make the hardware datapath to/from @dev limited to a common MTU */
1824static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
1825{
1826 struct list_head hw_port_list;
1827 struct dsa_switch_tree *dst;
1828 int min_mtu = ETH_MAX_MTU;
1829 struct dsa_port *other_dp;
1830 int err;
1831
1832 if (!dp->ds->mtu_enforcement_ingress)
1833 return;
1834
1835 if (!dp->bridge)
1836 return;
1837
1838 INIT_LIST_HEAD(&hw_port_list);
1839
1840 /* Populate the list of ports that are part of the same bridge
1841 * as the newly added/modified port
1842 */
1843 list_for_each_entry(dst, &dsa_tree_list, list) {
1844 list_for_each_entry(other_dp, &dst->ports, list) {
1845 struct dsa_hw_port *hw_port;
1846 struct net_device *slave;
1847
1848 if (other_dp->type != DSA_PORT_TYPE_USER)
1849 continue;
1850
1851 if (!dsa_port_bridge_same(dp, other_dp))
1852 continue;
1853
1854 if (!other_dp->ds->mtu_enforcement_ingress)
1855 continue;
1856
1857 slave = other_dp->slave;
1858
1859 if (min_mtu > slave->mtu)
1860 min_mtu = slave->mtu;
1861
1862 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL);
1863 if (!hw_port)
1864 goto out;
1865
1866 hw_port->dev = slave;
1867 hw_port->old_mtu = slave->mtu;
1868
1869 list_add(&hw_port->list, &hw_port_list);
1870 }
1871 }
1872
1873 /* Attempt to configure the entire hardware bridge to the newly added
1874 * interface's MTU first, regardless of whether the intention of the
1875 * user was to raise or lower it.
1876 */
1877 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu);
1878 if (!err)
1879 goto out;
1880
1881 /* Clearly that didn't work out so well, so just set the minimum MTU on
1882 * all hardware bridge ports now. If this fails too, then all ports will
1883 * still have their old MTU rolled back anyway.
1884 */
1885 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu);
1886
1887out:
1888 dsa_hw_port_list_free(&hw_port_list);
1889}
1890
1891int dsa_slave_change_mtu(struct net_device *dev, int new_mtu)
1892{
1893 struct net_device *master = dsa_slave_to_master(dev);
1894 struct dsa_port *dp = dsa_slave_to_port(dev);
1895 struct dsa_port *cpu_dp = dp->cpu_dp;
1896 struct dsa_switch *ds = dp->ds;
1897 struct dsa_port *other_dp;
1898 int largest_mtu = 0;
1899 int new_master_mtu;
1900 int old_master_mtu;
1901 int mtu_limit;
1902 int cpu_mtu;
1903 int err;
1904
1905 if (!ds->ops->port_change_mtu)
1906 return -EOPNOTSUPP;
1907
1908 dsa_tree_for_each_user_port(other_dp, ds->dst) {
1909 int slave_mtu;
1910
1911 /* During probe, this function will be called for each slave
1912 * device, while not all of them have been allocated. That's
1913 * ok, it doesn't change what the maximum is, so ignore it.
1914 */
1915 if (!other_dp->slave)
1916 continue;
1917
1918 /* Pretend that we already applied the setting, which we
1919 * actually haven't (still haven't done all integrity checks)
1920 */
1921 if (dp == other_dp)
1922 slave_mtu = new_mtu;
1923 else
1924 slave_mtu = other_dp->slave->mtu;
1925
1926 if (largest_mtu < slave_mtu)
1927 largest_mtu = slave_mtu;
1928 }
1929
1930 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu);
1931 old_master_mtu = master->mtu;
1932 new_master_mtu = largest_mtu + dsa_tag_protocol_overhead(cpu_dp->tag_ops);
1933 if (new_master_mtu > mtu_limit)
1934 return -ERANGE;
1935
1936 /* If the master MTU isn't over limit, there's no need to check the CPU
1937 * MTU, since that surely isn't either.
1938 */
1939 cpu_mtu = largest_mtu;
1940
1941 /* Start applying stuff */
1942 if (new_master_mtu != old_master_mtu) {
1943 err = dev_set_mtu(master, new_master_mtu);
1944 if (err < 0)
1945 goto out_master_failed;
1946
1947 /* We only need to propagate the MTU of the CPU port to
1948 * upstream switches, so emit a notifier which updates them.
1949 */
1950 err = dsa_port_mtu_change(cpu_dp, cpu_mtu);
1951 if (err)
1952 goto out_cpu_failed;
1953 }
1954
1955 err = ds->ops->port_change_mtu(ds, dp->index, new_mtu);
1956 if (err)
1957 goto out_port_failed;
1958
1959 dev->mtu = new_mtu;
1960
1961 dsa_bridge_mtu_normalization(dp);
1962
1963 return 0;
1964
1965out_port_failed:
1966 if (new_master_mtu != old_master_mtu)
1967 dsa_port_mtu_change(cpu_dp, old_master_mtu -
1968 dsa_tag_protocol_overhead(cpu_dp->tag_ops));
1969out_cpu_failed:
1970 if (new_master_mtu != old_master_mtu)
1971 dev_set_mtu(master, old_master_mtu);
1972out_master_failed:
1973 return err;
1974}
1975
1976static int __maybe_unused
1977dsa_slave_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app)
1978{
1979 struct dsa_port *dp = dsa_slave_to_port(dev);
1980 struct dsa_switch *ds = dp->ds;
1981 unsigned long mask, new_prio;
1982 int err, port = dp->index;
1983
1984 if (!ds->ops->port_set_default_prio)
1985 return -EOPNOTSUPP;
1986
1987 err = dcb_ieee_setapp(dev, app);
1988 if (err)
1989 return err;
1990
1991 mask = dcb_ieee_getapp_mask(dev, app);
1992 new_prio = __fls(mask);
1993
1994 err = ds->ops->port_set_default_prio(ds, port, new_prio);
1995 if (err) {
1996 dcb_ieee_delapp(dev, app);
1997 return err;
1998 }
1999
2000 return 0;
2001}
2002
2003static int __maybe_unused
2004dsa_slave_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app)
2005{
2006 struct dsa_port *dp = dsa_slave_to_port(dev);
2007 struct dsa_switch *ds = dp->ds;
2008 unsigned long mask, new_prio;
2009 int err, port = dp->index;
2010 u8 dscp = app->protocol;
2011
2012 if (!ds->ops->port_add_dscp_prio)
2013 return -EOPNOTSUPP;
2014
2015 if (dscp >= 64) {
2016 netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n",
2017 dscp);
2018 return -EINVAL;
2019 }
2020
2021 err = dcb_ieee_setapp(dev, app);
2022 if (err)
2023 return err;
2024
2025 mask = dcb_ieee_getapp_mask(dev, app);
2026 new_prio = __fls(mask);
2027
2028 err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio);
2029 if (err) {
2030 dcb_ieee_delapp(dev, app);
2031 return err;
2032 }
2033
2034 return 0;
2035}
2036
2037static int __maybe_unused dsa_slave_dcbnl_ieee_setapp(struct net_device *dev,
2038 struct dcb_app *app)
2039{
2040 switch (app->selector) {
2041 case IEEE_8021QAZ_APP_SEL_ETHERTYPE:
2042 switch (app->protocol) {
2043 case 0:
2044 return dsa_slave_dcbnl_set_default_prio(dev, app);
2045 default:
2046 return -EOPNOTSUPP;
2047 }
2048 break;
2049 case IEEE_8021QAZ_APP_SEL_DSCP:
2050 return dsa_slave_dcbnl_add_dscp_prio(dev, app);
2051 default:
2052 return -EOPNOTSUPP;
2053 }
2054}
2055
2056static int __maybe_unused
2057dsa_slave_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app)
2058{
2059 struct dsa_port *dp = dsa_slave_to_port(dev);
2060 struct dsa_switch *ds = dp->ds;
2061 unsigned long mask, new_prio;
2062 int err, port = dp->index;
2063
2064 if (!ds->ops->port_set_default_prio)
2065 return -EOPNOTSUPP;
2066
2067 err = dcb_ieee_delapp(dev, app);
2068 if (err)
2069 return err;
2070
2071 mask = dcb_ieee_getapp_mask(dev, app);
2072 new_prio = mask ? __fls(mask) : 0;
2073
2074 err = ds->ops->port_set_default_prio(ds, port, new_prio);
2075 if (err) {
2076 dcb_ieee_setapp(dev, app);
2077 return err;
2078 }
2079
2080 return 0;
2081}
2082
2083static int __maybe_unused
2084dsa_slave_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app)
2085{
2086 struct dsa_port *dp = dsa_slave_to_port(dev);
2087 struct dsa_switch *ds = dp->ds;
2088 int err, port = dp->index;
2089 u8 dscp = app->protocol;
2090
2091 if (!ds->ops->port_del_dscp_prio)
2092 return -EOPNOTSUPP;
2093
2094 err = dcb_ieee_delapp(dev, app);
2095 if (err)
2096 return err;
2097
2098 err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority);
2099 if (err) {
2100 dcb_ieee_setapp(dev, app);
2101 return err;
2102 }
2103
2104 return 0;
2105}
2106
2107static int __maybe_unused dsa_slave_dcbnl_ieee_delapp(struct net_device *dev,
2108 struct dcb_app *app)
2109{
2110 switch (app->selector) {
2111 case IEEE_8021QAZ_APP_SEL_ETHERTYPE:
2112 switch (app->protocol) {
2113 case 0:
2114 return dsa_slave_dcbnl_del_default_prio(dev, app);
2115 default:
2116 return -EOPNOTSUPP;
2117 }
2118 break;
2119 case IEEE_8021QAZ_APP_SEL_DSCP:
2120 return dsa_slave_dcbnl_del_dscp_prio(dev, app);
2121 default:
2122 return -EOPNOTSUPP;
2123 }
2124}
2125
2126/* Pre-populate the DCB application priority table with the priorities
2127 * configured during switch setup, which we read from hardware here.
2128 */
2129static int dsa_slave_dcbnl_init(struct net_device *dev)
2130{
2131 struct dsa_port *dp = dsa_slave_to_port(dev);
2132 struct dsa_switch *ds = dp->ds;
2133 int port = dp->index;
2134 int err;
2135
2136 if (ds->ops->port_get_default_prio) {
2137 int prio = ds->ops->port_get_default_prio(ds, port);
2138 struct dcb_app app = {
2139 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE,
2140 .protocol = 0,
2141 .priority = prio,
2142 };
2143
2144 if (prio < 0)
2145 return prio;
2146
2147 err = dcb_ieee_setapp(dev, &app);
2148 if (err)
2149 return err;
2150 }
2151
2152 if (ds->ops->port_get_dscp_prio) {
2153 int protocol;
2154
2155 for (protocol = 0; protocol < 64; protocol++) {
2156 struct dcb_app app = {
2157 .selector = IEEE_8021QAZ_APP_SEL_DSCP,
2158 .protocol = protocol,
2159 };
2160 int prio;
2161
2162 prio = ds->ops->port_get_dscp_prio(ds, port, protocol);
2163 if (prio == -EOPNOTSUPP)
2164 continue;
2165 if (prio < 0)
2166 return prio;
2167
2168 app.priority = prio;
2169
2170 err = dcb_ieee_setapp(dev, &app);
2171 if (err)
2172 return err;
2173 }
2174 }
2175
2176 return 0;
2177}
2178
2179static const struct ethtool_ops dsa_slave_ethtool_ops = {
2180 .get_drvinfo = dsa_slave_get_drvinfo,
2181 .get_regs_len = dsa_slave_get_regs_len,
2182 .get_regs = dsa_slave_get_regs,
2183 .nway_reset = dsa_slave_nway_reset,
2184 .get_link = ethtool_op_get_link,
2185 .get_eeprom_len = dsa_slave_get_eeprom_len,
2186 .get_eeprom = dsa_slave_get_eeprom,
2187 .set_eeprom = dsa_slave_set_eeprom,
2188 .get_strings = dsa_slave_get_strings,
2189 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
2190 .get_sset_count = dsa_slave_get_sset_count,
2191 .get_eth_phy_stats = dsa_slave_get_eth_phy_stats,
2192 .get_eth_mac_stats = dsa_slave_get_eth_mac_stats,
2193 .get_eth_ctrl_stats = dsa_slave_get_eth_ctrl_stats,
2194 .get_rmon_stats = dsa_slave_get_rmon_stats,
2195 .set_wol = dsa_slave_set_wol,
2196 .get_wol = dsa_slave_get_wol,
2197 .set_eee = dsa_slave_set_eee,
2198 .get_eee = dsa_slave_get_eee,
2199 .get_link_ksettings = dsa_slave_get_link_ksettings,
2200 .set_link_ksettings = dsa_slave_set_link_ksettings,
2201 .get_pause_stats = dsa_slave_get_pause_stats,
2202 .get_pauseparam = dsa_slave_get_pauseparam,
2203 .set_pauseparam = dsa_slave_set_pauseparam,
2204 .get_rxnfc = dsa_slave_get_rxnfc,
2205 .set_rxnfc = dsa_slave_set_rxnfc,
2206 .get_ts_info = dsa_slave_get_ts_info,
2207 .self_test = dsa_slave_net_selftest,
2208};
2209
2210static const struct dcbnl_rtnl_ops __maybe_unused dsa_slave_dcbnl_ops = {
2211 .ieee_setapp = dsa_slave_dcbnl_ieee_setapp,
2212 .ieee_delapp = dsa_slave_dcbnl_ieee_delapp,
2213};
2214
2215static void dsa_slave_get_stats64(struct net_device *dev,
2216 struct rtnl_link_stats64 *s)
2217{
2218 struct dsa_port *dp = dsa_slave_to_port(dev);
2219 struct dsa_switch *ds = dp->ds;
2220
2221 if (ds->ops->get_stats64)
2222 ds->ops->get_stats64(ds, dp->index, s);
2223 else
2224 dev_get_tstats64(dev, s);
2225}
2226
2227static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx,
2228 struct net_device_path *path)
2229{
2230 struct dsa_port *dp = dsa_slave_to_port(ctx->dev);
2231 struct net_device *master = dsa_port_to_master(dp);
2232 struct dsa_port *cpu_dp = dp->cpu_dp;
2233
2234 path->dev = ctx->dev;
2235 path->type = DEV_PATH_DSA;
2236 path->dsa.proto = cpu_dp->tag_ops->proto;
2237 path->dsa.port = dp->index;
2238 ctx->dev = master;
2239
2240 return 0;
2241}
2242
2243static const struct net_device_ops dsa_slave_netdev_ops = {
2244 .ndo_open = dsa_slave_open,
2245 .ndo_stop = dsa_slave_close,
2246 .ndo_start_xmit = dsa_slave_xmit,
2247 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
2248 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
2249 .ndo_set_mac_address = dsa_slave_set_mac_address,
2250 .ndo_fdb_dump = dsa_slave_fdb_dump,
2251 .ndo_eth_ioctl = dsa_slave_ioctl,
2252 .ndo_get_iflink = dsa_slave_get_iflink,
2253#ifdef CONFIG_NET_POLL_CONTROLLER
2254 .ndo_netpoll_setup = dsa_slave_netpoll_setup,
2255 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
2256 .ndo_poll_controller = dsa_slave_poll_controller,
2257#endif
2258 .ndo_setup_tc = dsa_slave_setup_tc,
2259 .ndo_get_stats64 = dsa_slave_get_stats64,
2260 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
2261 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
2262 .ndo_change_mtu = dsa_slave_change_mtu,
2263 .ndo_fill_forward_path = dsa_slave_fill_forward_path,
2264};
2265
2266static struct device_type dsa_type = {
2267 .name = "dsa",
2268};
2269
2270void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
2271{
2272 const struct dsa_port *dp = dsa_to_port(ds, port);
2273
2274 if (dp->pl)
2275 phylink_mac_change(dp->pl, up);
2276}
2277EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
2278
2279static void dsa_slave_phylink_fixed_state(struct phylink_config *config,
2280 struct phylink_link_state *state)
2281{
2282 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
2283 struct dsa_switch *ds = dp->ds;
2284
2285 /* No need to check that this operation is valid, the callback would
2286 * not be called if it was not.
2287 */
2288 ds->ops->phylink_fixed_state(ds, dp->index, state);
2289}
2290
2291/* slave device setup *******************************************************/
2292static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr,
2293 u32 flags)
2294{
2295 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
2296 struct dsa_switch *ds = dp->ds;
2297
2298 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
2299 if (!slave_dev->phydev) {
2300 netdev_err(slave_dev, "no phy at %d\n", addr);
2301 return -ENODEV;
2302 }
2303
2304 slave_dev->phydev->dev_flags |= flags;
2305
2306 return phylink_connect_phy(dp->pl, slave_dev->phydev);
2307}
2308
2309static int dsa_slave_phy_setup(struct net_device *slave_dev)
2310{
2311 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
2312 struct device_node *port_dn = dp->dn;
2313 struct dsa_switch *ds = dp->ds;
2314 u32 phy_flags = 0;
2315 int ret;
2316
2317 dp->pl_config.dev = &slave_dev->dev;
2318 dp->pl_config.type = PHYLINK_NETDEV;
2319
2320 /* The get_fixed_state callback takes precedence over polling the
2321 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set
2322 * this if the switch provides such a callback.
2323 */
2324 if (ds->ops->phylink_fixed_state) {
2325 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state;
2326 dp->pl_config.poll_fixed_state = true;
2327 }
2328
2329 ret = dsa_port_phylink_create(dp);
2330 if (ret)
2331 return ret;
2332
2333 if (ds->ops->get_phy_flags)
2334 phy_flags = ds->ops->get_phy_flags(ds, dp->index);
2335
2336 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
2337 if (ret == -ENODEV && ds->slave_mii_bus) {
2338 /* We could not connect to a designated PHY or SFP, so try to
2339 * use the switch internal MDIO bus instead
2340 */
2341 ret = dsa_slave_phy_connect(slave_dev, dp->index, phy_flags);
2342 }
2343 if (ret) {
2344 netdev_err(slave_dev, "failed to connect to PHY: %pe\n",
2345 ERR_PTR(ret));
2346 dsa_port_phylink_destroy(dp);
2347 }
2348
2349 return ret;
2350}
2351
2352void dsa_slave_setup_tagger(struct net_device *slave)
2353{
2354 struct dsa_port *dp = dsa_slave_to_port(slave);
2355 struct net_device *master = dsa_port_to_master(dp);
2356 struct dsa_slave_priv *p = netdev_priv(slave);
2357 const struct dsa_port *cpu_dp = dp->cpu_dp;
2358 const struct dsa_switch *ds = dp->ds;
2359
2360 slave->needed_headroom = cpu_dp->tag_ops->needed_headroom;
2361 slave->needed_tailroom = cpu_dp->tag_ops->needed_tailroom;
2362 /* Try to save one extra realloc later in the TX path (in the master)
2363 * by also inheriting the master's needed headroom and tailroom.
2364 * The 8021q driver also does this.
2365 */
2366 slave->needed_headroom += master->needed_headroom;
2367 slave->needed_tailroom += master->needed_tailroom;
2368
2369 p->xmit = cpu_dp->tag_ops->xmit;
2370
2371 slave->features = master->vlan_features | NETIF_F_HW_TC;
2372 slave->hw_features |= NETIF_F_HW_TC;
2373 slave->features |= NETIF_F_LLTX;
2374 if (slave->needed_tailroom)
2375 slave->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST);
2376 if (ds->needs_standalone_vlan_filtering)
2377 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
2378}
2379
2380int dsa_slave_suspend(struct net_device *slave_dev)
2381{
2382 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
2383
2384 if (!netif_running(slave_dev))
2385 return 0;
2386
2387 netif_device_detach(slave_dev);
2388
2389 rtnl_lock();
2390 phylink_stop(dp->pl);
2391 rtnl_unlock();
2392
2393 return 0;
2394}
2395
2396int dsa_slave_resume(struct net_device *slave_dev)
2397{
2398 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
2399
2400 if (!netif_running(slave_dev))
2401 return 0;
2402
2403 netif_device_attach(slave_dev);
2404
2405 rtnl_lock();
2406 phylink_start(dp->pl);
2407 rtnl_unlock();
2408
2409 return 0;
2410}
2411
2412int dsa_slave_create(struct dsa_port *port)
2413{
2414 struct net_device *master = dsa_port_to_master(port);
2415 struct dsa_switch *ds = port->ds;
2416 struct net_device *slave_dev;
2417 struct dsa_slave_priv *p;
2418 const char *name;
2419 int assign_type;
2420 int ret;
2421
2422 if (!ds->num_tx_queues)
2423 ds->num_tx_queues = 1;
2424
2425 if (port->name) {
2426 name = port->name;
2427 assign_type = NET_NAME_PREDICTABLE;
2428 } else {
2429 name = "eth%d";
2430 assign_type = NET_NAME_ENUM;
2431 }
2432
2433 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
2434 assign_type, ether_setup,
2435 ds->num_tx_queues, 1);
2436 if (slave_dev == NULL)
2437 return -ENOMEM;
2438
2439 slave_dev->rtnl_link_ops = &dsa_link_ops;
2440 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
2441#if IS_ENABLED(CONFIG_DCB)
2442 slave_dev->dcbnl_ops = &dsa_slave_dcbnl_ops;
2443#endif
2444 if (!is_zero_ether_addr(port->mac))
2445 eth_hw_addr_set(slave_dev, port->mac);
2446 else
2447 eth_hw_addr_inherit(slave_dev, master);
2448 slave_dev->priv_flags |= IFF_NO_QUEUE;
2449 if (dsa_switch_supports_uc_filtering(ds))
2450 slave_dev->priv_flags |= IFF_UNICAST_FLT;
2451 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
2452 if (ds->ops->port_max_mtu)
2453 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
2454 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
2455
2456 SET_NETDEV_DEV(slave_dev, port->ds->dev);
2457 SET_NETDEV_DEVLINK_PORT(slave_dev, &port->devlink_port);
2458 slave_dev->dev.of_node = port->dn;
2459 slave_dev->vlan_features = master->vlan_features;
2460
2461 p = netdev_priv(slave_dev);
2462 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2463 if (!slave_dev->tstats) {
2464 free_netdev(slave_dev);
2465 return -ENOMEM;
2466 }
2467
2468 ret = gro_cells_init(&p->gcells, slave_dev);
2469 if (ret)
2470 goto out_free;
2471
2472 p->dp = port;
2473 INIT_LIST_HEAD(&p->mall_tc_list);
2474 port->slave = slave_dev;
2475 dsa_slave_setup_tagger(slave_dev);
2476
2477 netif_carrier_off(slave_dev);
2478
2479 ret = dsa_slave_phy_setup(slave_dev);
2480 if (ret) {
2481 netdev_err(slave_dev,
2482 "error %d setting up PHY for tree %d, switch %d, port %d\n",
2483 ret, ds->dst->index, ds->index, port->index);
2484 goto out_gcells;
2485 }
2486
2487 rtnl_lock();
2488
2489 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN);
2490 if (ret && ret != -EOPNOTSUPP)
2491 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n",
2492 ret, ETH_DATA_LEN, port->index);
2493
2494 ret = register_netdevice(slave_dev);
2495 if (ret) {
2496 netdev_err(master, "error %d registering interface %s\n",
2497 ret, slave_dev->name);
2498 rtnl_unlock();
2499 goto out_phy;
2500 }
2501
2502 if (IS_ENABLED(CONFIG_DCB)) {
2503 ret = dsa_slave_dcbnl_init(slave_dev);
2504 if (ret) {
2505 netdev_err(slave_dev,
2506 "failed to initialize DCB: %pe\n",
2507 ERR_PTR(ret));
2508 rtnl_unlock();
2509 goto out_unregister;
2510 }
2511 }
2512
2513 ret = netdev_upper_dev_link(master, slave_dev, NULL);
2514
2515 rtnl_unlock();
2516
2517 if (ret)
2518 goto out_unregister;
2519
2520 return 0;
2521
2522out_unregister:
2523 unregister_netdev(slave_dev);
2524out_phy:
2525 rtnl_lock();
2526 phylink_disconnect_phy(p->dp->pl);
2527 rtnl_unlock();
2528 dsa_port_phylink_destroy(p->dp);
2529out_gcells:
2530 gro_cells_destroy(&p->gcells);
2531out_free:
2532 free_percpu(slave_dev->tstats);
2533 free_netdev(slave_dev);
2534 port->slave = NULL;
2535 return ret;
2536}
2537
2538void dsa_slave_destroy(struct net_device *slave_dev)
2539{
2540 struct net_device *master = dsa_slave_to_master(slave_dev);
2541 struct dsa_port *dp = dsa_slave_to_port(slave_dev);
2542 struct dsa_slave_priv *p = netdev_priv(slave_dev);
2543
2544 netif_carrier_off(slave_dev);
2545 rtnl_lock();
2546 netdev_upper_dev_unlink(master, slave_dev);
2547 unregister_netdevice(slave_dev);
2548 phylink_disconnect_phy(dp->pl);
2549 rtnl_unlock();
2550
2551 dsa_port_phylink_destroy(dp);
2552 gro_cells_destroy(&p->gcells);
2553 free_percpu(slave_dev->tstats);
2554 free_netdev(slave_dev);
2555}
2556
2557int dsa_slave_change_master(struct net_device *dev, struct net_device *master,
2558 struct netlink_ext_ack *extack)
2559{
2560 struct net_device *old_master = dsa_slave_to_master(dev);
2561 struct dsa_port *dp = dsa_slave_to_port(dev);
2562 struct dsa_switch *ds = dp->ds;
2563 struct net_device *upper;
2564 struct list_head *iter;
2565 int err;
2566
2567 if (master == old_master)
2568 return 0;
2569
2570 if (!ds->ops->port_change_master) {
2571 NL_SET_ERR_MSG_MOD(extack,
2572 "Driver does not support changing DSA master");
2573 return -EOPNOTSUPP;
2574 }
2575
2576 if (!netdev_uses_dsa(master)) {
2577 NL_SET_ERR_MSG_MOD(extack,
2578 "Interface not eligible as DSA master");
2579 return -EOPNOTSUPP;
2580 }
2581
2582 netdev_for_each_upper_dev_rcu(master, upper, iter) {
2583 if (dsa_slave_dev_check(upper))
2584 continue;
2585 if (netif_is_bridge_master(upper))
2586 continue;
2587 NL_SET_ERR_MSG_MOD(extack, "Cannot join master with unknown uppers");
2588 return -EOPNOTSUPP;
2589 }
2590
2591 /* Since we allow live-changing the DSA master, plus we auto-open the
2592 * DSA master when the user port opens => we need to ensure that the
2593 * new DSA master is open too.
2594 */
2595 if (dev->flags & IFF_UP) {
2596 err = dev_open(master, extack);
2597 if (err)
2598 return err;
2599 }
2600
2601 netdev_upper_dev_unlink(old_master, dev);
2602
2603 err = netdev_upper_dev_link(master, dev, extack);
2604 if (err)
2605 goto out_revert_old_master_unlink;
2606
2607 err = dsa_port_change_master(dp, master, extack);
2608 if (err)
2609 goto out_revert_master_link;
2610
2611 /* Update the MTU of the new CPU port through cross-chip notifiers */
2612 err = dsa_slave_change_mtu(dev, dev->mtu);
2613 if (err && err != -EOPNOTSUPP) {
2614 netdev_warn(dev,
2615 "nonfatal error updating MTU with new master: %pe\n",
2616 ERR_PTR(err));
2617 }
2618
2619 /* If the port doesn't have its own MAC address and relies on the DSA
2620 * master's one, inherit it again from the new DSA master.
2621 */
2622 if (is_zero_ether_addr(dp->mac))
2623 eth_hw_addr_inherit(dev, master);
2624
2625 return 0;
2626
2627out_revert_master_link:
2628 netdev_upper_dev_unlink(master, dev);
2629out_revert_old_master_unlink:
2630 netdev_upper_dev_link(old_master, dev, NULL);
2631 return err;
2632}
2633
2634bool dsa_slave_dev_check(const struct net_device *dev)
2635{
2636 return dev->netdev_ops == &dsa_slave_netdev_ops;
2637}
2638EXPORT_SYMBOL_GPL(dsa_slave_dev_check);
2639
2640static int dsa_slave_changeupper(struct net_device *dev,
2641 struct netdev_notifier_changeupper_info *info)
2642{
2643 struct dsa_port *dp = dsa_slave_to_port(dev);
2644 struct netlink_ext_ack *extack;
2645 int err = NOTIFY_DONE;
2646
2647 if (!dsa_slave_dev_check(dev))
2648 return err;
2649
2650 extack = netdev_notifier_info_to_extack(&info->info);
2651
2652 if (netif_is_bridge_master(info->upper_dev)) {
2653 if (info->linking) {
2654 err = dsa_port_bridge_join(dp, info->upper_dev, extack);
2655 if (!err)
2656 dsa_bridge_mtu_normalization(dp);
2657 if (err == -EOPNOTSUPP) {
2658 if (extack && !extack->_msg)
2659 NL_SET_ERR_MSG_MOD(extack,
2660 "Offloading not supported");
2661 err = 0;
2662 }
2663 err = notifier_from_errno(err);
2664 } else {
2665 dsa_port_bridge_leave(dp, info->upper_dev);
2666 err = NOTIFY_OK;
2667 }
2668 } else if (netif_is_lag_master(info->upper_dev)) {
2669 if (info->linking) {
2670 err = dsa_port_lag_join(dp, info->upper_dev,
2671 info->upper_info, extack);
2672 if (err == -EOPNOTSUPP) {
2673 NL_SET_ERR_MSG_MOD(info->info.extack,
2674 "Offloading not supported");
2675 err = 0;
2676 }
2677 err = notifier_from_errno(err);
2678 } else {
2679 dsa_port_lag_leave(dp, info->upper_dev);
2680 err = NOTIFY_OK;
2681 }
2682 } else if (is_hsr_master(info->upper_dev)) {
2683 if (info->linking) {
2684 err = dsa_port_hsr_join(dp, info->upper_dev);
2685 if (err == -EOPNOTSUPP) {
2686 NL_SET_ERR_MSG_MOD(info->info.extack,
2687 "Offloading not supported");
2688 err = 0;
2689 }
2690 err = notifier_from_errno(err);
2691 } else {
2692 dsa_port_hsr_leave(dp, info->upper_dev);
2693 err = NOTIFY_OK;
2694 }
2695 }
2696
2697 return err;
2698}
2699
2700static int dsa_slave_prechangeupper(struct net_device *dev,
2701 struct netdev_notifier_changeupper_info *info)
2702{
2703 struct dsa_port *dp = dsa_slave_to_port(dev);
2704
2705 if (!dsa_slave_dev_check(dev))
2706 return NOTIFY_DONE;
2707
2708 if (netif_is_bridge_master(info->upper_dev) && !info->linking)
2709 dsa_port_pre_bridge_leave(dp, info->upper_dev);
2710 else if (netif_is_lag_master(info->upper_dev) && !info->linking)
2711 dsa_port_pre_lag_leave(dp, info->upper_dev);
2712 /* dsa_port_pre_hsr_leave is not yet necessary since hsr cannot be
2713 * meaningfully enslaved to a bridge yet
2714 */
2715
2716 return NOTIFY_DONE;
2717}
2718
2719static int
2720dsa_slave_lag_changeupper(struct net_device *dev,
2721 struct netdev_notifier_changeupper_info *info)
2722{
2723 struct net_device *lower;
2724 struct list_head *iter;
2725 int err = NOTIFY_DONE;
2726 struct dsa_port *dp;
2727
2728 if (!netif_is_lag_master(dev))
2729 return err;
2730
2731 netdev_for_each_lower_dev(dev, lower, iter) {
2732 if (!dsa_slave_dev_check(lower))
2733 continue;
2734
2735 dp = dsa_slave_to_port(lower);
2736 if (!dp->lag)
2737 /* Software LAG */
2738 continue;
2739
2740 err = dsa_slave_changeupper(lower, info);
2741 if (notifier_to_errno(err))
2742 break;
2743 }
2744
2745 return err;
2746}
2747
2748/* Same as dsa_slave_lag_changeupper() except that it calls
2749 * dsa_slave_prechangeupper()
2750 */
2751static int
2752dsa_slave_lag_prechangeupper(struct net_device *dev,
2753 struct netdev_notifier_changeupper_info *info)
2754{
2755 struct net_device *lower;
2756 struct list_head *iter;
2757 int err = NOTIFY_DONE;
2758 struct dsa_port *dp;
2759
2760 if (!netif_is_lag_master(dev))
2761 return err;
2762
2763 netdev_for_each_lower_dev(dev, lower, iter) {
2764 if (!dsa_slave_dev_check(lower))
2765 continue;
2766
2767 dp = dsa_slave_to_port(lower);
2768 if (!dp->lag)
2769 /* Software LAG */
2770 continue;
2771
2772 err = dsa_slave_prechangeupper(lower, info);
2773 if (notifier_to_errno(err))
2774 break;
2775 }
2776
2777 return err;
2778}
2779
2780static int
2781dsa_prevent_bridging_8021q_upper(struct net_device *dev,
2782 struct netdev_notifier_changeupper_info *info)
2783{
2784 struct netlink_ext_ack *ext_ack;
2785 struct net_device *slave, *br;
2786 struct dsa_port *dp;
2787
2788 ext_ack = netdev_notifier_info_to_extack(&info->info);
2789
2790 if (!is_vlan_dev(dev))
2791 return NOTIFY_DONE;
2792
2793 slave = vlan_dev_real_dev(dev);
2794 if (!dsa_slave_dev_check(slave))
2795 return NOTIFY_DONE;
2796
2797 dp = dsa_slave_to_port(slave);
2798 br = dsa_port_bridge_dev_get(dp);
2799 if (!br)
2800 return NOTIFY_DONE;
2801
2802 /* Deny enslaving a VLAN device into a VLAN-aware bridge */
2803 if (br_vlan_enabled(br) &&
2804 netif_is_bridge_master(info->upper_dev) && info->linking) {
2805 NL_SET_ERR_MSG_MOD(ext_ack,
2806 "Cannot enslave VLAN device into VLAN aware bridge");
2807 return notifier_from_errno(-EINVAL);
2808 }
2809
2810 return NOTIFY_DONE;
2811}
2812
2813static int
2814dsa_slave_check_8021q_upper(struct net_device *dev,
2815 struct netdev_notifier_changeupper_info *info)
2816{
2817 struct dsa_port *dp = dsa_slave_to_port(dev);
2818 struct net_device *br = dsa_port_bridge_dev_get(dp);
2819 struct bridge_vlan_info br_info;
2820 struct netlink_ext_ack *extack;
2821 int err = NOTIFY_DONE;
2822 u16 vid;
2823
2824 if (!br || !br_vlan_enabled(br))
2825 return NOTIFY_DONE;
2826
2827 extack = netdev_notifier_info_to_extack(&info->info);
2828 vid = vlan_dev_vlan_id(info->upper_dev);
2829
2830 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
2831 * device, respectively the VID is not found, returning
2832 * 0 means success, which is a failure for us here.
2833 */
2834 err = br_vlan_get_info(br, vid, &br_info);
2835 if (err == 0) {
2836 NL_SET_ERR_MSG_MOD(extack,
2837 "This VLAN is already configured by the bridge");
2838 return notifier_from_errno(-EBUSY);
2839 }
2840
2841 return NOTIFY_DONE;
2842}
2843
2844static int
2845dsa_slave_prechangeupper_sanity_check(struct net_device *dev,
2846 struct netdev_notifier_changeupper_info *info)
2847{
2848 struct dsa_switch *ds;
2849 struct dsa_port *dp;
2850 int err;
2851
2852 if (!dsa_slave_dev_check(dev))
2853 return dsa_prevent_bridging_8021q_upper(dev, info);
2854
2855 dp = dsa_slave_to_port(dev);
2856 ds = dp->ds;
2857
2858 if (ds->ops->port_prechangeupper) {
2859 err = ds->ops->port_prechangeupper(ds, dp->index, info);
2860 if (err)
2861 return notifier_from_errno(err);
2862 }
2863
2864 if (is_vlan_dev(info->upper_dev))
2865 return dsa_slave_check_8021q_upper(dev, info);
2866
2867 return NOTIFY_DONE;
2868}
2869
2870/* To be eligible as a DSA master, a LAG must have all lower interfaces be
2871 * eligible DSA masters. Additionally, all LAG slaves must be DSA masters of
2872 * switches in the same switch tree.
2873 */
2874static int dsa_lag_master_validate(struct net_device *lag_dev,
2875 struct netlink_ext_ack *extack)
2876{
2877 struct net_device *lower1, *lower2;
2878 struct list_head *iter1, *iter2;
2879
2880 netdev_for_each_lower_dev(lag_dev, lower1, iter1) {
2881 netdev_for_each_lower_dev(lag_dev, lower2, iter2) {
2882 if (!netdev_uses_dsa(lower1) ||
2883 !netdev_uses_dsa(lower2)) {
2884 NL_SET_ERR_MSG_MOD(extack,
2885 "All LAG ports must be eligible as DSA masters");
2886 return notifier_from_errno(-EINVAL);
2887 }
2888
2889 if (lower1 == lower2)
2890 continue;
2891
2892 if (!dsa_port_tree_same(lower1->dsa_ptr,
2893 lower2->dsa_ptr)) {
2894 NL_SET_ERR_MSG_MOD(extack,
2895 "LAG contains DSA masters of disjoint switch trees");
2896 return notifier_from_errno(-EINVAL);
2897 }
2898 }
2899 }
2900
2901 return NOTIFY_DONE;
2902}
2903
2904static int
2905dsa_master_prechangeupper_sanity_check(struct net_device *master,
2906 struct netdev_notifier_changeupper_info *info)
2907{
2908 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info);
2909
2910 if (!netdev_uses_dsa(master))
2911 return NOTIFY_DONE;
2912
2913 if (!info->linking)
2914 return NOTIFY_DONE;
2915
2916 /* Allow DSA switch uppers */
2917 if (dsa_slave_dev_check(info->upper_dev))
2918 return NOTIFY_DONE;
2919
2920 /* Allow bridge uppers of DSA masters, subject to further
2921 * restrictions in dsa_bridge_prechangelower_sanity_check()
2922 */
2923 if (netif_is_bridge_master(info->upper_dev))
2924 return NOTIFY_DONE;
2925
2926 /* Allow LAG uppers, subject to further restrictions in
2927 * dsa_lag_master_prechangelower_sanity_check()
2928 */
2929 if (netif_is_lag_master(info->upper_dev))
2930 return dsa_lag_master_validate(info->upper_dev, extack);
2931
2932 NL_SET_ERR_MSG_MOD(extack,
2933 "DSA master cannot join unknown upper interfaces");
2934 return notifier_from_errno(-EBUSY);
2935}
2936
2937static int
2938dsa_lag_master_prechangelower_sanity_check(struct net_device *dev,
2939 struct netdev_notifier_changeupper_info *info)
2940{
2941 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info);
2942 struct net_device *lag_dev = info->upper_dev;
2943 struct net_device *lower;
2944 struct list_head *iter;
2945
2946 if (!netdev_uses_dsa(lag_dev) || !netif_is_lag_master(lag_dev))
2947 return NOTIFY_DONE;
2948
2949 if (!info->linking)
2950 return NOTIFY_DONE;
2951
2952 if (!netdev_uses_dsa(dev)) {
2953 NL_SET_ERR_MSG(extack,
2954 "Only DSA masters can join a LAG DSA master");
2955 return notifier_from_errno(-EINVAL);
2956 }
2957
2958 netdev_for_each_lower_dev(lag_dev, lower, iter) {
2959 if (!dsa_port_tree_same(dev->dsa_ptr, lower->dsa_ptr)) {
2960 NL_SET_ERR_MSG(extack,
2961 "Interface is DSA master for a different switch tree than this LAG");
2962 return notifier_from_errno(-EINVAL);
2963 }
2964
2965 break;
2966 }
2967
2968 return NOTIFY_DONE;
2969}
2970
2971/* Don't allow bridging of DSA masters, since the bridge layer rx_handler
2972 * prevents the DSA fake ethertype handler to be invoked, so we don't get the
2973 * chance to strip off and parse the DSA switch tag protocol header (the bridge
2974 * layer just returns RX_HANDLER_CONSUMED, stopping RX processing for these
2975 * frames).
2976 * The only case where that would not be an issue is when bridging can already
2977 * be offloaded, such as when the DSA master is itself a DSA or plain switchdev
2978 * port, and is bridged only with other ports from the same hardware device.
2979 */
2980static int
2981dsa_bridge_prechangelower_sanity_check(struct net_device *new_lower,
2982 struct netdev_notifier_changeupper_info *info)
2983{
2984 struct net_device *br = info->upper_dev;
2985 struct netlink_ext_ack *extack;
2986 struct net_device *lower;
2987 struct list_head *iter;
2988
2989 if (!netif_is_bridge_master(br))
2990 return NOTIFY_DONE;
2991
2992 if (!info->linking)
2993 return NOTIFY_DONE;
2994
2995 extack = netdev_notifier_info_to_extack(&info->info);
2996
2997 netdev_for_each_lower_dev(br, lower, iter) {
2998 if (!netdev_uses_dsa(new_lower) && !netdev_uses_dsa(lower))
2999 continue;
3000
3001 if (!netdev_port_same_parent_id(lower, new_lower)) {
3002 NL_SET_ERR_MSG(extack,
3003 "Cannot do software bridging with a DSA master");
3004 return notifier_from_errno(-EINVAL);
3005 }
3006 }
3007
3008 return NOTIFY_DONE;
3009}
3010
3011static void dsa_tree_migrate_ports_from_lag_master(struct dsa_switch_tree *dst,
3012 struct net_device *lag_dev)
3013{
3014 struct net_device *new_master = dsa_tree_find_first_master(dst);
3015 struct dsa_port *dp;
3016 int err;
3017
3018 dsa_tree_for_each_user_port(dp, dst) {
3019 if (dsa_port_to_master(dp) != lag_dev)
3020 continue;
3021
3022 err = dsa_slave_change_master(dp->slave, new_master, NULL);
3023 if (err) {
3024 netdev_err(dp->slave,
3025 "failed to restore master to %s: %pe\n",
3026 new_master->name, ERR_PTR(err));
3027 }
3028 }
3029}
3030
3031static int dsa_master_lag_join(struct net_device *master,
3032 struct net_device *lag_dev,
3033 struct netdev_lag_upper_info *uinfo,
3034 struct netlink_ext_ack *extack)
3035{
3036 struct dsa_port *cpu_dp = master->dsa_ptr;
3037 struct dsa_switch_tree *dst = cpu_dp->dst;
3038 struct dsa_port *dp;
3039 int err;
3040
3041 err = dsa_master_lag_setup(lag_dev, cpu_dp, uinfo, extack);
3042 if (err)
3043 return err;
3044
3045 dsa_tree_for_each_user_port(dp, dst) {
3046 if (dsa_port_to_master(dp) != master)
3047 continue;
3048
3049 err = dsa_slave_change_master(dp->slave, lag_dev, extack);
3050 if (err)
3051 goto restore;
3052 }
3053
3054 return 0;
3055
3056restore:
3057 dsa_tree_for_each_user_port_continue_reverse(dp, dst) {
3058 if (dsa_port_to_master(dp) != lag_dev)
3059 continue;
3060
3061 err = dsa_slave_change_master(dp->slave, master, NULL);
3062 if (err) {
3063 netdev_err(dp->slave,
3064 "failed to restore master to %s: %pe\n",
3065 master->name, ERR_PTR(err));
3066 }
3067 }
3068
3069 dsa_master_lag_teardown(lag_dev, master->dsa_ptr);
3070
3071 return err;
3072}
3073
3074static void dsa_master_lag_leave(struct net_device *master,
3075 struct net_device *lag_dev)
3076{
3077 struct dsa_port *dp, *cpu_dp = lag_dev->dsa_ptr;
3078 struct dsa_switch_tree *dst = cpu_dp->dst;
3079 struct dsa_port *new_cpu_dp = NULL;
3080 struct net_device *lower;
3081 struct list_head *iter;
3082
3083 netdev_for_each_lower_dev(lag_dev, lower, iter) {
3084 if (netdev_uses_dsa(lower)) {
3085 new_cpu_dp = lower->dsa_ptr;
3086 break;
3087 }
3088 }
3089
3090 if (new_cpu_dp) {
3091 /* Update the CPU port of the user ports still under the LAG
3092 * so that dsa_port_to_master() continues to work properly
3093 */
3094 dsa_tree_for_each_user_port(dp, dst)
3095 if (dsa_port_to_master(dp) == lag_dev)
3096 dp->cpu_dp = new_cpu_dp;
3097
3098 /* Update the index of the virtual CPU port to match the lowest
3099 * physical CPU port
3100 */
3101 lag_dev->dsa_ptr = new_cpu_dp;
3102 wmb();
3103 } else {
3104 /* If the LAG DSA master has no ports left, migrate back all
3105 * user ports to the first physical CPU port
3106 */
3107 dsa_tree_migrate_ports_from_lag_master(dst, lag_dev);
3108 }
3109
3110 /* This DSA master has left its LAG in any case, so let
3111 * the CPU port leave the hardware LAG as well
3112 */
3113 dsa_master_lag_teardown(lag_dev, master->dsa_ptr);
3114}
3115
3116static int dsa_master_changeupper(struct net_device *dev,
3117 struct netdev_notifier_changeupper_info *info)
3118{
3119 struct netlink_ext_ack *extack;
3120 int err = NOTIFY_DONE;
3121
3122 if (!netdev_uses_dsa(dev))
3123 return err;
3124
3125 extack = netdev_notifier_info_to_extack(&info->info);
3126
3127 if (netif_is_lag_master(info->upper_dev)) {
3128 if (info->linking) {
3129 err = dsa_master_lag_join(dev, info->upper_dev,
3130 info->upper_info, extack);
3131 err = notifier_from_errno(err);
3132 } else {
3133 dsa_master_lag_leave(dev, info->upper_dev);
3134 err = NOTIFY_OK;
3135 }
3136 }
3137
3138 return err;
3139}
3140
3141static int dsa_slave_netdevice_event(struct notifier_block *nb,
3142 unsigned long event, void *ptr)
3143{
3144 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3145
3146 switch (event) {
3147 case NETDEV_PRECHANGEUPPER: {
3148 struct netdev_notifier_changeupper_info *info = ptr;
3149 int err;
3150
3151 err = dsa_slave_prechangeupper_sanity_check(dev, info);
3152 if (notifier_to_errno(err))
3153 return err;
3154
3155 err = dsa_master_prechangeupper_sanity_check(dev, info);
3156 if (notifier_to_errno(err))
3157 return err;
3158
3159 err = dsa_lag_master_prechangelower_sanity_check(dev, info);
3160 if (notifier_to_errno(err))
3161 return err;
3162
3163 err = dsa_bridge_prechangelower_sanity_check(dev, info);
3164 if (notifier_to_errno(err))
3165 return err;
3166
3167 err = dsa_slave_prechangeupper(dev, ptr);
3168 if (notifier_to_errno(err))
3169 return err;
3170
3171 err = dsa_slave_lag_prechangeupper(dev, ptr);
3172 if (notifier_to_errno(err))
3173 return err;
3174
3175 break;
3176 }
3177 case NETDEV_CHANGEUPPER: {
3178 int err;
3179
3180 err = dsa_slave_changeupper(dev, ptr);
3181 if (notifier_to_errno(err))
3182 return err;
3183
3184 err = dsa_slave_lag_changeupper(dev, ptr);
3185 if (notifier_to_errno(err))
3186 return err;
3187
3188 err = dsa_master_changeupper(dev, ptr);
3189 if (notifier_to_errno(err))
3190 return err;
3191
3192 break;
3193 }
3194 case NETDEV_CHANGELOWERSTATE: {
3195 struct netdev_notifier_changelowerstate_info *info = ptr;
3196 struct dsa_port *dp;
3197 int err = 0;
3198
3199 if (dsa_slave_dev_check(dev)) {
3200 dp = dsa_slave_to_port(dev);
3201
3202 err = dsa_port_lag_change(dp, info->lower_state_info);
3203 }
3204
3205 /* Mirror LAG port events on DSA masters that are in
3206 * a LAG towards their respective switch CPU ports
3207 */
3208 if (netdev_uses_dsa(dev)) {
3209 dp = dev->dsa_ptr;
3210
3211 err = dsa_port_lag_change(dp, info->lower_state_info);
3212 }
3213
3214 return notifier_from_errno(err);
3215 }
3216 case NETDEV_CHANGE:
3217 case NETDEV_UP: {
3218 /* Track state of master port.
3219 * DSA driver may require the master port (and indirectly
3220 * the tagger) to be available for some special operation.
3221 */
3222 if (netdev_uses_dsa(dev)) {
3223 struct dsa_port *cpu_dp = dev->dsa_ptr;
3224 struct dsa_switch_tree *dst = cpu_dp->ds->dst;
3225
3226 /* Track when the master port is UP */
3227 dsa_tree_master_oper_state_change(dst, dev,
3228 netif_oper_up(dev));
3229
3230 /* Track when the master port is ready and can accept
3231 * packet.
3232 * NETDEV_UP event is not enough to flag a port as ready.
3233 * We also have to wait for linkwatch_do_dev to dev_activate
3234 * and emit a NETDEV_CHANGE event.
3235 * We check if a master port is ready by checking if the dev
3236 * have a qdisc assigned and is not noop.
3237 */
3238 dsa_tree_master_admin_state_change(dst, dev,
3239 !qdisc_tx_is_noop(dev));
3240
3241 return NOTIFY_OK;
3242 }
3243
3244 return NOTIFY_DONE;
3245 }
3246 case NETDEV_GOING_DOWN: {
3247 struct dsa_port *dp, *cpu_dp;
3248 struct dsa_switch_tree *dst;
3249 LIST_HEAD(close_list);
3250
3251 if (!netdev_uses_dsa(dev))
3252 return NOTIFY_DONE;
3253
3254 cpu_dp = dev->dsa_ptr;
3255 dst = cpu_dp->ds->dst;
3256
3257 dsa_tree_master_admin_state_change(dst, dev, false);
3258
3259 list_for_each_entry(dp, &dst->ports, list) {
3260 if (!dsa_port_is_user(dp))
3261 continue;
3262
3263 if (dp->cpu_dp != cpu_dp)
3264 continue;
3265
3266 list_add(&dp->slave->close_list, &close_list);
3267 }
3268
3269 dev_close_many(&close_list, true);
3270
3271 return NOTIFY_OK;
3272 }
3273 default:
3274 break;
3275 }
3276
3277 return NOTIFY_DONE;
3278}
3279
3280static void
3281dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work)
3282{
3283 struct switchdev_notifier_fdb_info info = {};
3284
3285 info.addr = switchdev_work->addr;
3286 info.vid = switchdev_work->vid;
3287 info.offloaded = true;
3288 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
3289 switchdev_work->orig_dev, &info.info, NULL);
3290}
3291
3292static void dsa_slave_switchdev_event_work(struct work_struct *work)
3293{
3294 struct dsa_switchdev_event_work *switchdev_work =
3295 container_of(work, struct dsa_switchdev_event_work, work);
3296 const unsigned char *addr = switchdev_work->addr;
3297 struct net_device *dev = switchdev_work->dev;
3298 u16 vid = switchdev_work->vid;
3299 struct dsa_switch *ds;
3300 struct dsa_port *dp;
3301 int err;
3302
3303 dp = dsa_slave_to_port(dev);
3304 ds = dp->ds;
3305
3306 switch (switchdev_work->event) {
3307 case SWITCHDEV_FDB_ADD_TO_DEVICE:
3308 if (switchdev_work->host_addr)
3309 err = dsa_port_bridge_host_fdb_add(dp, addr, vid);
3310 else if (dp->lag)
3311 err = dsa_port_lag_fdb_add(dp, addr, vid);
3312 else
3313 err = dsa_port_fdb_add(dp, addr, vid);
3314 if (err) {
3315 dev_err(ds->dev,
3316 "port %d failed to add %pM vid %d to fdb: %d\n",
3317 dp->index, addr, vid, err);
3318 break;
3319 }
3320 dsa_fdb_offload_notify(switchdev_work);
3321 break;
3322
3323 case SWITCHDEV_FDB_DEL_TO_DEVICE:
3324 if (switchdev_work->host_addr)
3325 err = dsa_port_bridge_host_fdb_del(dp, addr, vid);
3326 else if (dp->lag)
3327 err = dsa_port_lag_fdb_del(dp, addr, vid);
3328 else
3329 err = dsa_port_fdb_del(dp, addr, vid);
3330 if (err) {
3331 dev_err(ds->dev,
3332 "port %d failed to delete %pM vid %d from fdb: %d\n",
3333 dp->index, addr, vid, err);
3334 }
3335
3336 break;
3337 }
3338
3339 kfree(switchdev_work);
3340}
3341
3342static bool dsa_foreign_dev_check(const struct net_device *dev,
3343 const struct net_device *foreign_dev)
3344{
3345 const struct dsa_port *dp = dsa_slave_to_port(dev);
3346 struct dsa_switch_tree *dst = dp->ds->dst;
3347
3348 if (netif_is_bridge_master(foreign_dev))
3349 return !dsa_tree_offloads_bridge_dev(dst, foreign_dev);
3350
3351 if (netif_is_bridge_port(foreign_dev))
3352 return !dsa_tree_offloads_bridge_port(dst, foreign_dev);
3353
3354 /* Everything else is foreign */
3355 return true;
3356}
3357
3358static int dsa_slave_fdb_event(struct net_device *dev,
3359 struct net_device *orig_dev,
3360 unsigned long event, const void *ctx,
3361 const struct switchdev_notifier_fdb_info *fdb_info)
3362{
3363 struct dsa_switchdev_event_work *switchdev_work;
3364 struct dsa_port *dp = dsa_slave_to_port(dev);
3365 bool host_addr = fdb_info->is_local;
3366 struct dsa_switch *ds = dp->ds;
3367
3368 if (ctx && ctx != dp)
3369 return 0;
3370
3371 if (!dp->bridge)
3372 return 0;
3373
3374 if (switchdev_fdb_is_dynamically_learned(fdb_info)) {
3375 if (dsa_port_offloads_bridge_port(dp, orig_dev))
3376 return 0;
3377
3378 /* FDB entries learned by the software bridge or by foreign
3379 * bridge ports should be installed as host addresses only if
3380 * the driver requests assisted learning.
3381 */
3382 if (!ds->assisted_learning_on_cpu_port)
3383 return 0;
3384 }
3385
3386 /* Also treat FDB entries on foreign interfaces bridged with us as host
3387 * addresses.
3388 */
3389 if (dsa_foreign_dev_check(dev, orig_dev))
3390 host_addr = true;
3391
3392 /* Check early that we're not doing work in vain.
3393 * Host addresses on LAG ports still require regular FDB ops,
3394 * since the CPU port isn't in a LAG.
3395 */
3396 if (dp->lag && !host_addr) {
3397 if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del)
3398 return -EOPNOTSUPP;
3399 } else {
3400 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del)
3401 return -EOPNOTSUPP;
3402 }
3403
3404 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
3405 if (!switchdev_work)
3406 return -ENOMEM;
3407
3408 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n",
3409 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting",
3410 orig_dev->name, fdb_info->addr, fdb_info->vid,
3411 host_addr ? " as host address" : "");
3412
3413 INIT_WORK(&switchdev_work->work, dsa_slave_switchdev_event_work);
3414 switchdev_work->event = event;
3415 switchdev_work->dev = dev;
3416 switchdev_work->orig_dev = orig_dev;
3417
3418 ether_addr_copy(switchdev_work->addr, fdb_info->addr);
3419 switchdev_work->vid = fdb_info->vid;
3420 switchdev_work->host_addr = host_addr;
3421
3422 dsa_schedule_work(&switchdev_work->work);
3423
3424 return 0;
3425}
3426
3427/* Called under rcu_read_lock() */
3428static int dsa_slave_switchdev_event(struct notifier_block *unused,
3429 unsigned long event, void *ptr)
3430{
3431 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
3432 int err;
3433
3434 switch (event) {
3435 case SWITCHDEV_PORT_ATTR_SET:
3436 err = switchdev_handle_port_attr_set(dev, ptr,
3437 dsa_slave_dev_check,
3438 dsa_slave_port_attr_set);
3439 return notifier_from_errno(err);
3440 case SWITCHDEV_FDB_ADD_TO_DEVICE:
3441 case SWITCHDEV_FDB_DEL_TO_DEVICE:
3442 err = switchdev_handle_fdb_event_to_device(dev, event, ptr,
3443 dsa_slave_dev_check,
3444 dsa_foreign_dev_check,
3445 dsa_slave_fdb_event);
3446 return notifier_from_errno(err);
3447 default:
3448 return NOTIFY_DONE;
3449 }
3450
3451 return NOTIFY_OK;
3452}
3453
3454static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
3455 unsigned long event, void *ptr)
3456{
3457 struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
3458 int err;
3459
3460 switch (event) {
3461 case SWITCHDEV_PORT_OBJ_ADD:
3462 err = switchdev_handle_port_obj_add_foreign(dev, ptr,
3463 dsa_slave_dev_check,
3464 dsa_foreign_dev_check,
3465 dsa_slave_port_obj_add);
3466 return notifier_from_errno(err);
3467 case SWITCHDEV_PORT_OBJ_DEL:
3468 err = switchdev_handle_port_obj_del_foreign(dev, ptr,
3469 dsa_slave_dev_check,
3470 dsa_foreign_dev_check,
3471 dsa_slave_port_obj_del);
3472 return notifier_from_errno(err);
3473 case SWITCHDEV_PORT_ATTR_SET:
3474 err = switchdev_handle_port_attr_set(dev, ptr,
3475 dsa_slave_dev_check,
3476 dsa_slave_port_attr_set);
3477 return notifier_from_errno(err);
3478 }
3479
3480 return NOTIFY_DONE;
3481}
3482
3483static struct notifier_block dsa_slave_nb __read_mostly = {
3484 .notifier_call = dsa_slave_netdevice_event,
3485};
3486
3487struct notifier_block dsa_slave_switchdev_notifier = {
3488 .notifier_call = dsa_slave_switchdev_event,
3489};
3490
3491struct notifier_block dsa_slave_switchdev_blocking_notifier = {
3492 .notifier_call = dsa_slave_switchdev_blocking_event,
3493};
3494
3495int dsa_slave_register_notifier(void)
3496{
3497 struct notifier_block *nb;
3498 int err;
3499
3500 err = register_netdevice_notifier(&dsa_slave_nb);
3501 if (err)
3502 return err;
3503
3504 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
3505 if (err)
3506 goto err_switchdev_nb;
3507
3508 nb = &dsa_slave_switchdev_blocking_notifier;
3509 err = register_switchdev_blocking_notifier(nb);
3510 if (err)
3511 goto err_switchdev_blocking_nb;
3512
3513 return 0;
3514
3515err_switchdev_blocking_nb:
3516 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
3517err_switchdev_nb:
3518 unregister_netdevice_notifier(&dsa_slave_nb);
3519 return err;
3520}
3521
3522void dsa_slave_unregister_notifier(void)
3523{
3524 struct notifier_block *nb;
3525 int err;
3526
3527 nb = &dsa_slave_switchdev_blocking_notifier;
3528 err = unregister_switchdev_blocking_notifier(nb);
3529 if (err)
3530 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
3531
3532 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
3533 if (err)
3534 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
3535
3536 err = unregister_netdevice_notifier(&dsa_slave_nb);
3537 if (err)
3538 pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
3539}