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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Distributed Switch Architecture loopback driver
4 *
5 * Copyright (C) 2016, Florian Fainelli <f.fainelli@gmail.com>
6 */
7
8#include <linux/platform_device.h>
9#include <linux/netdevice.h>
10#include <linux/phy.h>
11#include <linux/phy_fixed.h>
12#include <linux/export.h>
13#include <linux/ethtool.h>
14#include <linux/workqueue.h>
15#include <linux/module.h>
16#include <linux/if_bridge.h>
17#include <linux/dsa/loop.h>
18#include <net/dsa.h>
19
20#include "dsa_loop.h"
21
22static struct dsa_loop_mib_entry dsa_loop_mibs[] = {
23 [DSA_LOOP_PHY_READ_OK] = { "phy_read_ok", },
24 [DSA_LOOP_PHY_READ_ERR] = { "phy_read_err", },
25 [DSA_LOOP_PHY_WRITE_OK] = { "phy_write_ok", },
26 [DSA_LOOP_PHY_WRITE_ERR] = { "phy_write_err", },
27};
28
29static struct phy_device *phydevs[PHY_MAX_ADDR];
30
31enum dsa_loop_devlink_resource_id {
32 DSA_LOOP_DEVLINK_PARAM_ID_VTU,
33};
34
35static u64 dsa_loop_devlink_vtu_get(void *priv)
36{
37 struct dsa_loop_priv *ps = priv;
38 unsigned int i, count = 0;
39 struct dsa_loop_vlan *vl;
40
41 for (i = 0; i < ARRAY_SIZE(ps->vlans); i++) {
42 vl = &ps->vlans[i];
43 if (vl->members)
44 count++;
45 }
46
47 return count;
48}
49
50static int dsa_loop_setup_devlink_resources(struct dsa_switch *ds)
51{
52 struct devlink_resource_size_params size_params;
53 struct dsa_loop_priv *ps = ds->priv;
54 int err;
55
56 devlink_resource_size_params_init(&size_params, ARRAY_SIZE(ps->vlans),
57 ARRAY_SIZE(ps->vlans),
58 1, DEVLINK_RESOURCE_UNIT_ENTRY);
59
60 err = dsa_devlink_resource_register(ds, "VTU", ARRAY_SIZE(ps->vlans),
61 DSA_LOOP_DEVLINK_PARAM_ID_VTU,
62 DEVLINK_RESOURCE_ID_PARENT_TOP,
63 &size_params);
64 if (err)
65 goto out;
66
67 dsa_devlink_resource_occ_get_register(ds,
68 DSA_LOOP_DEVLINK_PARAM_ID_VTU,
69 dsa_loop_devlink_vtu_get, ps);
70
71 return 0;
72
73out:
74 dsa_devlink_resources_unregister(ds);
75 return err;
76}
77
78static enum dsa_tag_protocol dsa_loop_get_protocol(struct dsa_switch *ds,
79 int port,
80 enum dsa_tag_protocol mp)
81{
82 dev_dbg(ds->dev, "%s: port: %d\n", __func__, port);
83
84 return DSA_TAG_PROTO_NONE;
85}
86
87static int dsa_loop_setup(struct dsa_switch *ds)
88{
89 struct dsa_loop_priv *ps = ds->priv;
90 unsigned int i;
91
92 for (i = 0; i < ds->num_ports; i++)
93 memcpy(ps->ports[i].mib, dsa_loop_mibs,
94 sizeof(dsa_loop_mibs));
95
96 dev_dbg(ds->dev, "%s\n", __func__);
97
98 return dsa_loop_setup_devlink_resources(ds);
99}
100
101static void dsa_loop_teardown(struct dsa_switch *ds)
102{
103 dsa_devlink_resources_unregister(ds);
104}
105
106static int dsa_loop_get_sset_count(struct dsa_switch *ds, int port, int sset)
107{
108 if (sset != ETH_SS_STATS && sset != ETH_SS_PHY_STATS)
109 return 0;
110
111 return __DSA_LOOP_CNT_MAX;
112}
113
114static void dsa_loop_get_strings(struct dsa_switch *ds, int port,
115 u32 stringset, uint8_t *data)
116{
117 struct dsa_loop_priv *ps = ds->priv;
118 unsigned int i;
119
120 if (stringset != ETH_SS_STATS && stringset != ETH_SS_PHY_STATS)
121 return;
122
123 for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
124 ethtool_puts(&data, ps->ports[port].mib[i].name);
125}
126
127static void dsa_loop_get_ethtool_stats(struct dsa_switch *ds, int port,
128 uint64_t *data)
129{
130 struct dsa_loop_priv *ps = ds->priv;
131 unsigned int i;
132
133 for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
134 data[i] = ps->ports[port].mib[i].val;
135}
136
137static int dsa_loop_phy_read(struct dsa_switch *ds, int port, int regnum)
138{
139 struct dsa_loop_priv *ps = ds->priv;
140 struct mii_bus *bus = ps->bus;
141 int ret;
142
143 ret = mdiobus_read_nested(bus, ps->port_base + port, regnum);
144 if (ret < 0)
145 ps->ports[port].mib[DSA_LOOP_PHY_READ_ERR].val++;
146 else
147 ps->ports[port].mib[DSA_LOOP_PHY_READ_OK].val++;
148
149 return ret;
150}
151
152static int dsa_loop_phy_write(struct dsa_switch *ds, int port,
153 int regnum, u16 value)
154{
155 struct dsa_loop_priv *ps = ds->priv;
156 struct mii_bus *bus = ps->bus;
157 int ret;
158
159 ret = mdiobus_write_nested(bus, ps->port_base + port, regnum, value);
160 if (ret < 0)
161 ps->ports[port].mib[DSA_LOOP_PHY_WRITE_ERR].val++;
162 else
163 ps->ports[port].mib[DSA_LOOP_PHY_WRITE_OK].val++;
164
165 return ret;
166}
167
168static int dsa_loop_port_bridge_join(struct dsa_switch *ds, int port,
169 struct dsa_bridge bridge,
170 bool *tx_fwd_offload,
171 struct netlink_ext_ack *extack)
172{
173 dev_dbg(ds->dev, "%s: port: %d, bridge: %s\n",
174 __func__, port, bridge.dev->name);
175
176 return 0;
177}
178
179static void dsa_loop_port_bridge_leave(struct dsa_switch *ds, int port,
180 struct dsa_bridge bridge)
181{
182 dev_dbg(ds->dev, "%s: port: %d, bridge: %s\n",
183 __func__, port, bridge.dev->name);
184}
185
186static void dsa_loop_port_stp_state_set(struct dsa_switch *ds, int port,
187 u8 state)
188{
189 dev_dbg(ds->dev, "%s: port: %d, state: %d\n",
190 __func__, port, state);
191}
192
193static int dsa_loop_port_vlan_filtering(struct dsa_switch *ds, int port,
194 bool vlan_filtering,
195 struct netlink_ext_ack *extack)
196{
197 dev_dbg(ds->dev, "%s: port: %d, vlan_filtering: %d\n",
198 __func__, port, vlan_filtering);
199
200 return 0;
201}
202
203static int dsa_loop_port_vlan_add(struct dsa_switch *ds, int port,
204 const struct switchdev_obj_port_vlan *vlan,
205 struct netlink_ext_ack *extack)
206{
207 bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
208 bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
209 struct dsa_loop_priv *ps = ds->priv;
210 struct mii_bus *bus = ps->bus;
211 struct dsa_loop_vlan *vl;
212
213 if (vlan->vid >= ARRAY_SIZE(ps->vlans))
214 return -ERANGE;
215
216 /* Just do a sleeping operation to make lockdep checks effective */
217 mdiobus_read(bus, ps->port_base + port, MII_BMSR);
218
219 vl = &ps->vlans[vlan->vid];
220
221 vl->members |= BIT(port);
222 if (untagged)
223 vl->untagged |= BIT(port);
224 else
225 vl->untagged &= ~BIT(port);
226
227 dev_dbg(ds->dev, "%s: port: %d vlan: %d, %stagged, pvid: %d\n",
228 __func__, port, vlan->vid, untagged ? "un" : "", pvid);
229
230 if (pvid)
231 ps->ports[port].pvid = vlan->vid;
232
233 return 0;
234}
235
236static int dsa_loop_port_vlan_del(struct dsa_switch *ds, int port,
237 const struct switchdev_obj_port_vlan *vlan)
238{
239 bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
240 struct dsa_loop_priv *ps = ds->priv;
241 u16 pvid = ps->ports[port].pvid;
242 struct mii_bus *bus = ps->bus;
243 struct dsa_loop_vlan *vl;
244
245 /* Just do a sleeping operation to make lockdep checks effective */
246 mdiobus_read(bus, ps->port_base + port, MII_BMSR);
247
248 vl = &ps->vlans[vlan->vid];
249
250 vl->members &= ~BIT(port);
251 if (untagged)
252 vl->untagged &= ~BIT(port);
253
254 if (pvid == vlan->vid)
255 pvid = 1;
256
257 dev_dbg(ds->dev, "%s: port: %d vlan: %d, %stagged, pvid: %d\n",
258 __func__, port, vlan->vid, untagged ? "un" : "", pvid);
259 ps->ports[port].pvid = pvid;
260
261 return 0;
262}
263
264static int dsa_loop_port_change_mtu(struct dsa_switch *ds, int port,
265 int new_mtu)
266{
267 struct dsa_loop_priv *priv = ds->priv;
268
269 priv->ports[port].mtu = new_mtu;
270
271 return 0;
272}
273
274static int dsa_loop_port_max_mtu(struct dsa_switch *ds, int port)
275{
276 return ETH_MAX_MTU;
277}
278
279static void dsa_loop_phylink_get_caps(struct dsa_switch *dsa, int port,
280 struct phylink_config *config)
281{
282 bitmap_fill(config->supported_interfaces, PHY_INTERFACE_MODE_MAX);
283 __clear_bit(PHY_INTERFACE_MODE_NA, config->supported_interfaces);
284 config->mac_capabilities = ~0;
285}
286
287static const struct dsa_switch_ops dsa_loop_driver = {
288 .get_tag_protocol = dsa_loop_get_protocol,
289 .setup = dsa_loop_setup,
290 .teardown = dsa_loop_teardown,
291 .get_strings = dsa_loop_get_strings,
292 .get_ethtool_stats = dsa_loop_get_ethtool_stats,
293 .get_sset_count = dsa_loop_get_sset_count,
294 .get_ethtool_phy_stats = dsa_loop_get_ethtool_stats,
295 .phy_read = dsa_loop_phy_read,
296 .phy_write = dsa_loop_phy_write,
297 .port_bridge_join = dsa_loop_port_bridge_join,
298 .port_bridge_leave = dsa_loop_port_bridge_leave,
299 .port_stp_state_set = dsa_loop_port_stp_state_set,
300 .port_vlan_filtering = dsa_loop_port_vlan_filtering,
301 .port_vlan_add = dsa_loop_port_vlan_add,
302 .port_vlan_del = dsa_loop_port_vlan_del,
303 .port_change_mtu = dsa_loop_port_change_mtu,
304 .port_max_mtu = dsa_loop_port_max_mtu,
305 .phylink_get_caps = dsa_loop_phylink_get_caps,
306};
307
308static int dsa_loop_drv_probe(struct mdio_device *mdiodev)
309{
310 struct dsa_loop_pdata *pdata = mdiodev->dev.platform_data;
311 struct dsa_loop_priv *ps;
312 struct dsa_switch *ds;
313 int ret;
314
315 if (!pdata)
316 return -ENODEV;
317
318 ds = devm_kzalloc(&mdiodev->dev, sizeof(*ds), GFP_KERNEL);
319 if (!ds)
320 return -ENOMEM;
321
322 ds->dev = &mdiodev->dev;
323 ds->num_ports = DSA_LOOP_NUM_PORTS;
324
325 ps = devm_kzalloc(&mdiodev->dev, sizeof(*ps), GFP_KERNEL);
326 if (!ps)
327 return -ENOMEM;
328
329 ps->netdev = dev_get_by_name(&init_net, pdata->netdev);
330 if (!ps->netdev)
331 return -EPROBE_DEFER;
332
333 pdata->cd.netdev[DSA_LOOP_CPU_PORT] = &ps->netdev->dev;
334
335 ds->dev = &mdiodev->dev;
336 ds->ops = &dsa_loop_driver;
337 ds->priv = ps;
338 ps->bus = mdiodev->bus;
339
340 dev_set_drvdata(&mdiodev->dev, ds);
341
342 ret = dsa_register_switch(ds);
343 if (!ret)
344 dev_info(&mdiodev->dev, "%s: 0x%0x\n",
345 pdata->name, pdata->enabled_ports);
346
347 return ret;
348}
349
350static void dsa_loop_drv_remove(struct mdio_device *mdiodev)
351{
352 struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);
353 struct dsa_loop_priv *ps;
354
355 if (!ds)
356 return;
357
358 ps = ds->priv;
359
360 dsa_unregister_switch(ds);
361 dev_put(ps->netdev);
362}
363
364static void dsa_loop_drv_shutdown(struct mdio_device *mdiodev)
365{
366 struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);
367
368 if (!ds)
369 return;
370
371 dsa_switch_shutdown(ds);
372
373 dev_set_drvdata(&mdiodev->dev, NULL);
374}
375
376static struct mdio_driver dsa_loop_drv = {
377 .mdiodrv.driver = {
378 .name = "dsa-loop",
379 },
380 .probe = dsa_loop_drv_probe,
381 .remove = dsa_loop_drv_remove,
382 .shutdown = dsa_loop_drv_shutdown,
383};
384
385#define NUM_FIXED_PHYS (DSA_LOOP_NUM_PORTS - 2)
386
387static void dsa_loop_phydevs_unregister(void)
388{
389 unsigned int i;
390
391 for (i = 0; i < NUM_FIXED_PHYS; i++)
392 if (!IS_ERR(phydevs[i])) {
393 fixed_phy_unregister(phydevs[i]);
394 phy_device_free(phydevs[i]);
395 }
396}
397
398static int __init dsa_loop_init(void)
399{
400 struct fixed_phy_status status = {
401 .link = 1,
402 .speed = SPEED_100,
403 .duplex = DUPLEX_FULL,
404 };
405 unsigned int i, ret;
406
407 for (i = 0; i < NUM_FIXED_PHYS; i++)
408 phydevs[i] = fixed_phy_register(PHY_POLL, &status, NULL);
409
410 ret = mdio_driver_register(&dsa_loop_drv);
411 if (ret)
412 dsa_loop_phydevs_unregister();
413
414 return ret;
415}
416module_init(dsa_loop_init);
417
418static void __exit dsa_loop_exit(void)
419{
420 mdio_driver_unregister(&dsa_loop_drv);
421 dsa_loop_phydevs_unregister();
422}
423module_exit(dsa_loop_exit);
424
425MODULE_SOFTDEP("pre: dsa_loop_bdinfo");
426MODULE_LICENSE("GPL");
427MODULE_AUTHOR("Florian Fainelli");
428MODULE_DESCRIPTION("DSA loopback driver");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Distributed Switch Architecture loopback driver
4 *
5 * Copyright (C) 2016, Florian Fainelli <f.fainelli@gmail.com>
6 */
7
8#include <linux/platform_device.h>
9#include <linux/netdevice.h>
10#include <linux/phy.h>
11#include <linux/phy_fixed.h>
12#include <linux/export.h>
13#include <linux/ethtool.h>
14#include <linux/workqueue.h>
15#include <linux/module.h>
16#include <linux/if_bridge.h>
17#include <linux/dsa/loop.h>
18#include <net/dsa.h>
19
20#include "dsa_loop.h"
21
22static struct dsa_loop_mib_entry dsa_loop_mibs[] = {
23 [DSA_LOOP_PHY_READ_OK] = { "phy_read_ok", },
24 [DSA_LOOP_PHY_READ_ERR] = { "phy_read_err", },
25 [DSA_LOOP_PHY_WRITE_OK] = { "phy_write_ok", },
26 [DSA_LOOP_PHY_WRITE_ERR] = { "phy_write_err", },
27};
28
29static struct phy_device *phydevs[PHY_MAX_ADDR];
30
31enum dsa_loop_devlink_resource_id {
32 DSA_LOOP_DEVLINK_PARAM_ID_VTU,
33};
34
35static u64 dsa_loop_devlink_vtu_get(void *priv)
36{
37 struct dsa_loop_priv *ps = priv;
38 unsigned int i, count = 0;
39 struct dsa_loop_vlan *vl;
40
41 for (i = 0; i < ARRAY_SIZE(ps->vlans); i++) {
42 vl = &ps->vlans[i];
43 if (vl->members)
44 count++;
45 }
46
47 return count;
48}
49
50static int dsa_loop_setup_devlink_resources(struct dsa_switch *ds)
51{
52 struct devlink_resource_size_params size_params;
53 struct dsa_loop_priv *ps = ds->priv;
54 int err;
55
56 devlink_resource_size_params_init(&size_params, ARRAY_SIZE(ps->vlans),
57 ARRAY_SIZE(ps->vlans),
58 1, DEVLINK_RESOURCE_UNIT_ENTRY);
59
60 err = dsa_devlink_resource_register(ds, "VTU", ARRAY_SIZE(ps->vlans),
61 DSA_LOOP_DEVLINK_PARAM_ID_VTU,
62 DEVLINK_RESOURCE_ID_PARENT_TOP,
63 &size_params);
64 if (err)
65 goto out;
66
67 dsa_devlink_resource_occ_get_register(ds,
68 DSA_LOOP_DEVLINK_PARAM_ID_VTU,
69 dsa_loop_devlink_vtu_get, ps);
70
71 return 0;
72
73out:
74 dsa_devlink_resources_unregister(ds);
75 return err;
76}
77
78static enum dsa_tag_protocol dsa_loop_get_protocol(struct dsa_switch *ds,
79 int port,
80 enum dsa_tag_protocol mp)
81{
82 dev_dbg(ds->dev, "%s: port: %d\n", __func__, port);
83
84 return DSA_TAG_PROTO_NONE;
85}
86
87static int dsa_loop_setup(struct dsa_switch *ds)
88{
89 struct dsa_loop_priv *ps = ds->priv;
90 unsigned int i;
91
92 for (i = 0; i < ds->num_ports; i++)
93 memcpy(ps->ports[i].mib, dsa_loop_mibs,
94 sizeof(dsa_loop_mibs));
95
96 dev_dbg(ds->dev, "%s\n", __func__);
97
98 return dsa_loop_setup_devlink_resources(ds);
99}
100
101static void dsa_loop_teardown(struct dsa_switch *ds)
102{
103 dsa_devlink_resources_unregister(ds);
104}
105
106static int dsa_loop_get_sset_count(struct dsa_switch *ds, int port, int sset)
107{
108 if (sset != ETH_SS_STATS && sset != ETH_SS_PHY_STATS)
109 return 0;
110
111 return __DSA_LOOP_CNT_MAX;
112}
113
114static void dsa_loop_get_strings(struct dsa_switch *ds, int port,
115 u32 stringset, uint8_t *data)
116{
117 struct dsa_loop_priv *ps = ds->priv;
118 unsigned int i;
119
120 if (stringset != ETH_SS_STATS && stringset != ETH_SS_PHY_STATS)
121 return;
122
123 for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
124 memcpy(data + i * ETH_GSTRING_LEN,
125 ps->ports[port].mib[i].name, ETH_GSTRING_LEN);
126}
127
128static void dsa_loop_get_ethtool_stats(struct dsa_switch *ds, int port,
129 uint64_t *data)
130{
131 struct dsa_loop_priv *ps = ds->priv;
132 unsigned int i;
133
134 for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
135 data[i] = ps->ports[port].mib[i].val;
136}
137
138static int dsa_loop_phy_read(struct dsa_switch *ds, int port, int regnum)
139{
140 struct dsa_loop_priv *ps = ds->priv;
141 struct mii_bus *bus = ps->bus;
142 int ret;
143
144 ret = mdiobus_read_nested(bus, ps->port_base + port, regnum);
145 if (ret < 0)
146 ps->ports[port].mib[DSA_LOOP_PHY_READ_ERR].val++;
147 else
148 ps->ports[port].mib[DSA_LOOP_PHY_READ_OK].val++;
149
150 return ret;
151}
152
153static int dsa_loop_phy_write(struct dsa_switch *ds, int port,
154 int regnum, u16 value)
155{
156 struct dsa_loop_priv *ps = ds->priv;
157 struct mii_bus *bus = ps->bus;
158 int ret;
159
160 ret = mdiobus_write_nested(bus, ps->port_base + port, regnum, value);
161 if (ret < 0)
162 ps->ports[port].mib[DSA_LOOP_PHY_WRITE_ERR].val++;
163 else
164 ps->ports[port].mib[DSA_LOOP_PHY_WRITE_OK].val++;
165
166 return ret;
167}
168
169static int dsa_loop_port_bridge_join(struct dsa_switch *ds, int port,
170 struct dsa_bridge bridge,
171 bool *tx_fwd_offload,
172 struct netlink_ext_ack *extack)
173{
174 dev_dbg(ds->dev, "%s: port: %d, bridge: %s\n",
175 __func__, port, bridge.dev->name);
176
177 return 0;
178}
179
180static void dsa_loop_port_bridge_leave(struct dsa_switch *ds, int port,
181 struct dsa_bridge bridge)
182{
183 dev_dbg(ds->dev, "%s: port: %d, bridge: %s\n",
184 __func__, port, bridge.dev->name);
185}
186
187static void dsa_loop_port_stp_state_set(struct dsa_switch *ds, int port,
188 u8 state)
189{
190 dev_dbg(ds->dev, "%s: port: %d, state: %d\n",
191 __func__, port, state);
192}
193
194static int dsa_loop_port_vlan_filtering(struct dsa_switch *ds, int port,
195 bool vlan_filtering,
196 struct netlink_ext_ack *extack)
197{
198 dev_dbg(ds->dev, "%s: port: %d, vlan_filtering: %d\n",
199 __func__, port, vlan_filtering);
200
201 return 0;
202}
203
204static int dsa_loop_port_vlan_add(struct dsa_switch *ds, int port,
205 const struct switchdev_obj_port_vlan *vlan,
206 struct netlink_ext_ack *extack)
207{
208 bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
209 bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
210 struct dsa_loop_priv *ps = ds->priv;
211 struct mii_bus *bus = ps->bus;
212 struct dsa_loop_vlan *vl;
213
214 if (vlan->vid >= ARRAY_SIZE(ps->vlans))
215 return -ERANGE;
216
217 /* Just do a sleeping operation to make lockdep checks effective */
218 mdiobus_read(bus, ps->port_base + port, MII_BMSR);
219
220 vl = &ps->vlans[vlan->vid];
221
222 vl->members |= BIT(port);
223 if (untagged)
224 vl->untagged |= BIT(port);
225 else
226 vl->untagged &= ~BIT(port);
227
228 dev_dbg(ds->dev, "%s: port: %d vlan: %d, %stagged, pvid: %d\n",
229 __func__, port, vlan->vid, untagged ? "un" : "", pvid);
230
231 if (pvid)
232 ps->ports[port].pvid = vlan->vid;
233
234 return 0;
235}
236
237static int dsa_loop_port_vlan_del(struct dsa_switch *ds, int port,
238 const struct switchdev_obj_port_vlan *vlan)
239{
240 bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
241 struct dsa_loop_priv *ps = ds->priv;
242 u16 pvid = ps->ports[port].pvid;
243 struct mii_bus *bus = ps->bus;
244 struct dsa_loop_vlan *vl;
245
246 /* Just do a sleeping operation to make lockdep checks effective */
247 mdiobus_read(bus, ps->port_base + port, MII_BMSR);
248
249 vl = &ps->vlans[vlan->vid];
250
251 vl->members &= ~BIT(port);
252 if (untagged)
253 vl->untagged &= ~BIT(port);
254
255 if (pvid == vlan->vid)
256 pvid = 1;
257
258 dev_dbg(ds->dev, "%s: port: %d vlan: %d, %stagged, pvid: %d\n",
259 __func__, port, vlan->vid, untagged ? "un" : "", pvid);
260 ps->ports[port].pvid = pvid;
261
262 return 0;
263}
264
265static int dsa_loop_port_change_mtu(struct dsa_switch *ds, int port,
266 int new_mtu)
267{
268 struct dsa_loop_priv *priv = ds->priv;
269
270 priv->ports[port].mtu = new_mtu;
271
272 return 0;
273}
274
275static int dsa_loop_port_max_mtu(struct dsa_switch *ds, int port)
276{
277 return ETH_MAX_MTU;
278}
279
280static void dsa_loop_phylink_get_caps(struct dsa_switch *dsa, int port,
281 struct phylink_config *config)
282{
283 bitmap_fill(config->supported_interfaces, PHY_INTERFACE_MODE_MAX);
284 __clear_bit(PHY_INTERFACE_MODE_NA, config->supported_interfaces);
285 config->mac_capabilities = ~0;
286}
287
288static const struct dsa_switch_ops dsa_loop_driver = {
289 .get_tag_protocol = dsa_loop_get_protocol,
290 .setup = dsa_loop_setup,
291 .teardown = dsa_loop_teardown,
292 .get_strings = dsa_loop_get_strings,
293 .get_ethtool_stats = dsa_loop_get_ethtool_stats,
294 .get_sset_count = dsa_loop_get_sset_count,
295 .get_ethtool_phy_stats = dsa_loop_get_ethtool_stats,
296 .phy_read = dsa_loop_phy_read,
297 .phy_write = dsa_loop_phy_write,
298 .port_bridge_join = dsa_loop_port_bridge_join,
299 .port_bridge_leave = dsa_loop_port_bridge_leave,
300 .port_stp_state_set = dsa_loop_port_stp_state_set,
301 .port_vlan_filtering = dsa_loop_port_vlan_filtering,
302 .port_vlan_add = dsa_loop_port_vlan_add,
303 .port_vlan_del = dsa_loop_port_vlan_del,
304 .port_change_mtu = dsa_loop_port_change_mtu,
305 .port_max_mtu = dsa_loop_port_max_mtu,
306 .phylink_get_caps = dsa_loop_phylink_get_caps,
307};
308
309static int dsa_loop_drv_probe(struct mdio_device *mdiodev)
310{
311 struct dsa_loop_pdata *pdata = mdiodev->dev.platform_data;
312 struct dsa_loop_priv *ps;
313 struct dsa_switch *ds;
314 int ret;
315
316 if (!pdata)
317 return -ENODEV;
318
319 ds = devm_kzalloc(&mdiodev->dev, sizeof(*ds), GFP_KERNEL);
320 if (!ds)
321 return -ENOMEM;
322
323 ds->dev = &mdiodev->dev;
324 ds->num_ports = DSA_LOOP_NUM_PORTS;
325
326 ps = devm_kzalloc(&mdiodev->dev, sizeof(*ps), GFP_KERNEL);
327 if (!ps)
328 return -ENOMEM;
329
330 ps->netdev = dev_get_by_name(&init_net, pdata->netdev);
331 if (!ps->netdev)
332 return -EPROBE_DEFER;
333
334 pdata->cd.netdev[DSA_LOOP_CPU_PORT] = &ps->netdev->dev;
335
336 ds->dev = &mdiodev->dev;
337 ds->ops = &dsa_loop_driver;
338 ds->priv = ps;
339 ps->bus = mdiodev->bus;
340
341 dev_set_drvdata(&mdiodev->dev, ds);
342
343 ret = dsa_register_switch(ds);
344 if (!ret)
345 dev_info(&mdiodev->dev, "%s: 0x%0x\n",
346 pdata->name, pdata->enabled_ports);
347
348 return ret;
349}
350
351static void dsa_loop_drv_remove(struct mdio_device *mdiodev)
352{
353 struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);
354 struct dsa_loop_priv *ps;
355
356 if (!ds)
357 return;
358
359 ps = ds->priv;
360
361 dsa_unregister_switch(ds);
362 dev_put(ps->netdev);
363}
364
365static void dsa_loop_drv_shutdown(struct mdio_device *mdiodev)
366{
367 struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);
368
369 if (!ds)
370 return;
371
372 dsa_switch_shutdown(ds);
373
374 dev_set_drvdata(&mdiodev->dev, NULL);
375}
376
377static struct mdio_driver dsa_loop_drv = {
378 .mdiodrv.driver = {
379 .name = "dsa-loop",
380 },
381 .probe = dsa_loop_drv_probe,
382 .remove = dsa_loop_drv_remove,
383 .shutdown = dsa_loop_drv_shutdown,
384};
385
386#define NUM_FIXED_PHYS (DSA_LOOP_NUM_PORTS - 2)
387
388static void dsa_loop_phydevs_unregister(void)
389{
390 unsigned int i;
391
392 for (i = 0; i < NUM_FIXED_PHYS; i++)
393 if (!IS_ERR(phydevs[i])) {
394 fixed_phy_unregister(phydevs[i]);
395 phy_device_free(phydevs[i]);
396 }
397}
398
399static int __init dsa_loop_init(void)
400{
401 struct fixed_phy_status status = {
402 .link = 1,
403 .speed = SPEED_100,
404 .duplex = DUPLEX_FULL,
405 };
406 unsigned int i, ret;
407
408 for (i = 0; i < NUM_FIXED_PHYS; i++)
409 phydevs[i] = fixed_phy_register(PHY_POLL, &status, NULL);
410
411 ret = mdio_driver_register(&dsa_loop_drv);
412 if (ret)
413 dsa_loop_phydevs_unregister();
414
415 return ret;
416}
417module_init(dsa_loop_init);
418
419static void __exit dsa_loop_exit(void)
420{
421 mdio_driver_unregister(&dsa_loop_drv);
422 dsa_loop_phydevs_unregister();
423}
424module_exit(dsa_loop_exit);
425
426MODULE_SOFTDEP("pre: dsa_loop_bdinfo");
427MODULE_LICENSE("GPL");
428MODULE_AUTHOR("Florian Fainelli");
429MODULE_DESCRIPTION("DSA loopback driver");