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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * net/dsa/dsa.c - Hardware switch handling
4 * Copyright (c) 2008-2009 Marvell Semiconductor
5 * Copyright (c) 2013 Florian Fainelli <florian@openwrt.org>
6 */
7
8#include <linux/device.h>
9#include <linux/list.h>
10#include <linux/platform_device.h>
11#include <linux/slab.h>
12#include <linux/module.h>
13#include <linux/notifier.h>
14#include <linux/of.h>
15#include <linux/of_mdio.h>
16#include <linux/of_platform.h>
17#include <linux/of_net.h>
18#include <linux/netdevice.h>
19#include <linux/sysfs.h>
20#include <linux/phy_fixed.h>
21#include <linux/ptp_classify.h>
22#include <linux/etherdevice.h>
23
24#include "dsa_priv.h"
25
26static LIST_HEAD(dsa_tag_drivers_list);
27static DEFINE_MUTEX(dsa_tag_drivers_lock);
28
29static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
30 struct net_device *dev)
31{
32 /* Just return the original SKB */
33 return skb;
34}
35
36static const struct dsa_device_ops none_ops = {
37 .name = "none",
38 .proto = DSA_TAG_PROTO_NONE,
39 .xmit = dsa_slave_notag_xmit,
40 .rcv = NULL,
41};
42
43DSA_TAG_DRIVER(none_ops);
44
45static void dsa_tag_driver_register(struct dsa_tag_driver *dsa_tag_driver,
46 struct module *owner)
47{
48 dsa_tag_driver->owner = owner;
49
50 mutex_lock(&dsa_tag_drivers_lock);
51 list_add_tail(&dsa_tag_driver->list, &dsa_tag_drivers_list);
52 mutex_unlock(&dsa_tag_drivers_lock);
53}
54
55void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[],
56 unsigned int count, struct module *owner)
57{
58 unsigned int i;
59
60 for (i = 0; i < count; i++)
61 dsa_tag_driver_register(dsa_tag_driver_array[i], owner);
62}
63
64static void dsa_tag_driver_unregister(struct dsa_tag_driver *dsa_tag_driver)
65{
66 mutex_lock(&dsa_tag_drivers_lock);
67 list_del(&dsa_tag_driver->list);
68 mutex_unlock(&dsa_tag_drivers_lock);
69}
70EXPORT_SYMBOL_GPL(dsa_tag_drivers_register);
71
72void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[],
73 unsigned int count)
74{
75 unsigned int i;
76
77 for (i = 0; i < count; i++)
78 dsa_tag_driver_unregister(dsa_tag_driver_array[i]);
79}
80EXPORT_SYMBOL_GPL(dsa_tag_drivers_unregister);
81
82const char *dsa_tag_protocol_to_str(const struct dsa_device_ops *ops)
83{
84 return ops->name;
85};
86
87/* Function takes a reference on the module owning the tagger,
88 * so dsa_tag_driver_put must be called afterwards.
89 */
90const struct dsa_device_ops *dsa_find_tagger_by_name(const char *buf)
91{
92 const struct dsa_device_ops *ops = ERR_PTR(-ENOPROTOOPT);
93 struct dsa_tag_driver *dsa_tag_driver;
94
95 mutex_lock(&dsa_tag_drivers_lock);
96 list_for_each_entry(dsa_tag_driver, &dsa_tag_drivers_list, list) {
97 const struct dsa_device_ops *tmp = dsa_tag_driver->ops;
98
99 if (!sysfs_streq(buf, tmp->name))
100 continue;
101
102 if (!try_module_get(dsa_tag_driver->owner))
103 break;
104
105 ops = tmp;
106 break;
107 }
108 mutex_unlock(&dsa_tag_drivers_lock);
109
110 return ops;
111}
112
113const struct dsa_device_ops *dsa_tag_driver_get(int tag_protocol)
114{
115 struct dsa_tag_driver *dsa_tag_driver;
116 const struct dsa_device_ops *ops;
117 bool found = false;
118
119 request_module("%s%d", DSA_TAG_DRIVER_ALIAS, tag_protocol);
120
121 mutex_lock(&dsa_tag_drivers_lock);
122 list_for_each_entry(dsa_tag_driver, &dsa_tag_drivers_list, list) {
123 ops = dsa_tag_driver->ops;
124 if (ops->proto == tag_protocol) {
125 found = true;
126 break;
127 }
128 }
129
130 if (found) {
131 if (!try_module_get(dsa_tag_driver->owner))
132 ops = ERR_PTR(-ENOPROTOOPT);
133 } else {
134 ops = ERR_PTR(-ENOPROTOOPT);
135 }
136
137 mutex_unlock(&dsa_tag_drivers_lock);
138
139 return ops;
140}
141
142void dsa_tag_driver_put(const struct dsa_device_ops *ops)
143{
144 struct dsa_tag_driver *dsa_tag_driver;
145
146 mutex_lock(&dsa_tag_drivers_lock);
147 list_for_each_entry(dsa_tag_driver, &dsa_tag_drivers_list, list) {
148 if (dsa_tag_driver->ops == ops) {
149 module_put(dsa_tag_driver->owner);
150 break;
151 }
152 }
153 mutex_unlock(&dsa_tag_drivers_lock);
154}
155
156static int dev_is_class(struct device *dev, void *class)
157{
158 if (dev->class != NULL && !strcmp(dev->class->name, class))
159 return 1;
160
161 return 0;
162}
163
164static struct device *dev_find_class(struct device *parent, char *class)
165{
166 if (dev_is_class(parent, class)) {
167 get_device(parent);
168 return parent;
169 }
170
171 return device_find_child(parent, class, dev_is_class);
172}
173
174struct net_device *dsa_dev_to_net_device(struct device *dev)
175{
176 struct device *d;
177
178 d = dev_find_class(dev, "net");
179 if (d != NULL) {
180 struct net_device *nd;
181
182 nd = to_net_dev(d);
183 dev_hold(nd);
184 put_device(d);
185
186 return nd;
187 }
188
189 return NULL;
190}
191EXPORT_SYMBOL_GPL(dsa_dev_to_net_device);
192
193/* Determine if we should defer delivery of skb until we have a rx timestamp.
194 *
195 * Called from dsa_switch_rcv. For now, this will only work if tagging is
196 * enabled on the switch. Normally the MAC driver would retrieve the hardware
197 * timestamp when it reads the packet out of the hardware. However in a DSA
198 * switch, the DSA driver owning the interface to which the packet is
199 * delivered is never notified unless we do so here.
200 */
201static bool dsa_skb_defer_rx_timestamp(struct dsa_slave_priv *p,
202 struct sk_buff *skb)
203{
204 struct dsa_switch *ds = p->dp->ds;
205 unsigned int type;
206
207 if (skb_headroom(skb) < ETH_HLEN)
208 return false;
209
210 __skb_push(skb, ETH_HLEN);
211
212 type = ptp_classify_raw(skb);
213
214 __skb_pull(skb, ETH_HLEN);
215
216 if (type == PTP_CLASS_NONE)
217 return false;
218
219 if (likely(ds->ops->port_rxtstamp))
220 return ds->ops->port_rxtstamp(ds, p->dp->index, skb, type);
221
222 return false;
223}
224
225static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev,
226 struct packet_type *pt, struct net_device *unused)
227{
228 struct dsa_port *cpu_dp = dev->dsa_ptr;
229 struct sk_buff *nskb = NULL;
230 struct dsa_slave_priv *p;
231
232 if (unlikely(!cpu_dp)) {
233 kfree_skb(skb);
234 return 0;
235 }
236
237 skb = skb_unshare(skb, GFP_ATOMIC);
238 if (!skb)
239 return 0;
240
241 nskb = cpu_dp->rcv(skb, dev, pt);
242 if (!nskb) {
243 kfree_skb(skb);
244 return 0;
245 }
246
247 skb = nskb;
248 skb_push(skb, ETH_HLEN);
249 skb->pkt_type = PACKET_HOST;
250 skb->protocol = eth_type_trans(skb, skb->dev);
251
252 if (unlikely(!dsa_slave_dev_check(skb->dev))) {
253 /* Packet is to be injected directly on an upper
254 * device, e.g. a team/bond, so skip all DSA-port
255 * specific actions.
256 */
257 netif_rx(skb);
258 return 0;
259 }
260
261 p = netdev_priv(skb->dev);
262
263 if (unlikely(cpu_dp->ds->untag_bridge_pvid)) {
264 nskb = dsa_untag_bridge_pvid(skb);
265 if (!nskb) {
266 kfree_skb(skb);
267 return 0;
268 }
269 skb = nskb;
270 }
271
272 dev_sw_netstats_rx_add(skb->dev, skb->len);
273
274 if (dsa_skb_defer_rx_timestamp(p, skb))
275 return 0;
276
277 gro_cells_receive(&p->gcells, skb);
278
279 return 0;
280}
281
282#ifdef CONFIG_PM_SLEEP
283static bool dsa_is_port_initialized(struct dsa_switch *ds, int p)
284{
285 const struct dsa_port *dp = dsa_to_port(ds, p);
286
287 return dp->type == DSA_PORT_TYPE_USER && dp->slave;
288}
289
290int dsa_switch_suspend(struct dsa_switch *ds)
291{
292 int i, ret = 0;
293
294 /* Suspend slave network devices */
295 for (i = 0; i < ds->num_ports; i++) {
296 if (!dsa_is_port_initialized(ds, i))
297 continue;
298
299 ret = dsa_slave_suspend(dsa_to_port(ds, i)->slave);
300 if (ret)
301 return ret;
302 }
303
304 if (ds->ops->suspend)
305 ret = ds->ops->suspend(ds);
306
307 return ret;
308}
309EXPORT_SYMBOL_GPL(dsa_switch_suspend);
310
311int dsa_switch_resume(struct dsa_switch *ds)
312{
313 int i, ret = 0;
314
315 if (ds->ops->resume)
316 ret = ds->ops->resume(ds);
317
318 if (ret)
319 return ret;
320
321 /* Resume slave network devices */
322 for (i = 0; i < ds->num_ports; i++) {
323 if (!dsa_is_port_initialized(ds, i))
324 continue;
325
326 ret = dsa_slave_resume(dsa_to_port(ds, i)->slave);
327 if (ret)
328 return ret;
329 }
330
331 return 0;
332}
333EXPORT_SYMBOL_GPL(dsa_switch_resume);
334#endif
335
336static struct packet_type dsa_pack_type __read_mostly = {
337 .type = cpu_to_be16(ETH_P_XDSA),
338 .func = dsa_switch_rcv,
339};
340
341static struct workqueue_struct *dsa_owq;
342
343bool dsa_schedule_work(struct work_struct *work)
344{
345 return queue_work(dsa_owq, work);
346}
347
348void dsa_flush_workqueue(void)
349{
350 flush_workqueue(dsa_owq);
351}
352
353int dsa_devlink_param_get(struct devlink *dl, u32 id,
354 struct devlink_param_gset_ctx *ctx)
355{
356 struct dsa_switch *ds = dsa_devlink_to_ds(dl);
357
358 if (!ds->ops->devlink_param_get)
359 return -EOPNOTSUPP;
360
361 return ds->ops->devlink_param_get(ds, id, ctx);
362}
363EXPORT_SYMBOL_GPL(dsa_devlink_param_get);
364
365int dsa_devlink_param_set(struct devlink *dl, u32 id,
366 struct devlink_param_gset_ctx *ctx)
367{
368 struct dsa_switch *ds = dsa_devlink_to_ds(dl);
369
370 if (!ds->ops->devlink_param_set)
371 return -EOPNOTSUPP;
372
373 return ds->ops->devlink_param_set(ds, id, ctx);
374}
375EXPORT_SYMBOL_GPL(dsa_devlink_param_set);
376
377int dsa_devlink_params_register(struct dsa_switch *ds,
378 const struct devlink_param *params,
379 size_t params_count)
380{
381 return devlink_params_register(ds->devlink, params, params_count);
382}
383EXPORT_SYMBOL_GPL(dsa_devlink_params_register);
384
385void dsa_devlink_params_unregister(struct dsa_switch *ds,
386 const struct devlink_param *params,
387 size_t params_count)
388{
389 devlink_params_unregister(ds->devlink, params, params_count);
390}
391EXPORT_SYMBOL_GPL(dsa_devlink_params_unregister);
392
393int dsa_devlink_resource_register(struct dsa_switch *ds,
394 const char *resource_name,
395 u64 resource_size,
396 u64 resource_id,
397 u64 parent_resource_id,
398 const struct devlink_resource_size_params *size_params)
399{
400 return devlink_resource_register(ds->devlink, resource_name,
401 resource_size, resource_id,
402 parent_resource_id,
403 size_params);
404}
405EXPORT_SYMBOL_GPL(dsa_devlink_resource_register);
406
407void dsa_devlink_resources_unregister(struct dsa_switch *ds)
408{
409 devlink_resources_unregister(ds->devlink, NULL);
410}
411EXPORT_SYMBOL_GPL(dsa_devlink_resources_unregister);
412
413void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds,
414 u64 resource_id,
415 devlink_resource_occ_get_t *occ_get,
416 void *occ_get_priv)
417{
418 return devlink_resource_occ_get_register(ds->devlink, resource_id,
419 occ_get, occ_get_priv);
420}
421EXPORT_SYMBOL_GPL(dsa_devlink_resource_occ_get_register);
422
423void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds,
424 u64 resource_id)
425{
426 devlink_resource_occ_get_unregister(ds->devlink, resource_id);
427}
428EXPORT_SYMBOL_GPL(dsa_devlink_resource_occ_get_unregister);
429
430struct devlink_region *
431dsa_devlink_region_create(struct dsa_switch *ds,
432 const struct devlink_region_ops *ops,
433 u32 region_max_snapshots, u64 region_size)
434{
435 return devlink_region_create(ds->devlink, ops, region_max_snapshots,
436 region_size);
437}
438EXPORT_SYMBOL_GPL(dsa_devlink_region_create);
439
440struct devlink_region *
441dsa_devlink_port_region_create(struct dsa_switch *ds,
442 int port,
443 const struct devlink_port_region_ops *ops,
444 u32 region_max_snapshots, u64 region_size)
445{
446 struct dsa_port *dp = dsa_to_port(ds, port);
447
448 return devlink_port_region_create(&dp->devlink_port, ops,
449 region_max_snapshots,
450 region_size);
451}
452EXPORT_SYMBOL_GPL(dsa_devlink_port_region_create);
453
454void dsa_devlink_region_destroy(struct devlink_region *region)
455{
456 devlink_region_destroy(region);
457}
458EXPORT_SYMBOL_GPL(dsa_devlink_region_destroy);
459
460struct dsa_port *dsa_port_from_netdev(struct net_device *netdev)
461{
462 if (!netdev || !dsa_slave_dev_check(netdev))
463 return ERR_PTR(-ENODEV);
464
465 return dsa_slave_to_port(netdev);
466}
467EXPORT_SYMBOL_GPL(dsa_port_from_netdev);
468
469static int __init dsa_init_module(void)
470{
471 int rc;
472
473 dsa_owq = alloc_ordered_workqueue("dsa_ordered",
474 WQ_MEM_RECLAIM);
475 if (!dsa_owq)
476 return -ENOMEM;
477
478 rc = dsa_slave_register_notifier();
479 if (rc)
480 goto register_notifier_fail;
481
482 dev_add_pack(&dsa_pack_type);
483
484 dsa_tag_driver_register(&DSA_TAG_DRIVER_NAME(none_ops),
485 THIS_MODULE);
486
487 return 0;
488
489register_notifier_fail:
490 destroy_workqueue(dsa_owq);
491
492 return rc;
493}
494module_init(dsa_init_module);
495
496static void __exit dsa_cleanup_module(void)
497{
498 dsa_tag_driver_unregister(&DSA_TAG_DRIVER_NAME(none_ops));
499
500 dsa_slave_unregister_notifier();
501 dev_remove_pack(&dsa_pack_type);
502 destroy_workqueue(dsa_owq);
503}
504module_exit(dsa_cleanup_module);
505
506MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
507MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips");
508MODULE_LICENSE("GPL");
509MODULE_ALIAS("platform:dsa");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * net/dsa/dsa.c - Hardware switch handling
4 * Copyright (c) 2008-2009 Marvell Semiconductor
5 * Copyright (c) 2013 Florian Fainelli <florian@openwrt.org>
6 */
7
8#include <linux/device.h>
9#include <linux/list.h>
10#include <linux/platform_device.h>
11#include <linux/slab.h>
12#include <linux/module.h>
13#include <linux/notifier.h>
14#include <linux/of.h>
15#include <linux/of_mdio.h>
16#include <linux/of_platform.h>
17#include <linux/of_net.h>
18#include <linux/netdevice.h>
19#include <linux/sysfs.h>
20#include <linux/phy_fixed.h>
21#include <linux/ptp_classify.h>
22#include <linux/etherdevice.h>
23
24#include "dsa_priv.h"
25
26static LIST_HEAD(dsa_tag_drivers_list);
27static DEFINE_MUTEX(dsa_tag_drivers_lock);
28
29static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
30 struct net_device *dev)
31{
32 /* Just return the original SKB */
33 return skb;
34}
35
36static const struct dsa_device_ops none_ops = {
37 .name = "none",
38 .proto = DSA_TAG_PROTO_NONE,
39 .xmit = dsa_slave_notag_xmit,
40 .rcv = NULL,
41};
42
43DSA_TAG_DRIVER(none_ops);
44
45static void dsa_tag_driver_register(struct dsa_tag_driver *dsa_tag_driver,
46 struct module *owner)
47{
48 dsa_tag_driver->owner = owner;
49
50 mutex_lock(&dsa_tag_drivers_lock);
51 list_add_tail(&dsa_tag_driver->list, &dsa_tag_drivers_list);
52 mutex_unlock(&dsa_tag_drivers_lock);
53}
54
55void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[],
56 unsigned int count, struct module *owner)
57{
58 unsigned int i;
59
60 for (i = 0; i < count; i++)
61 dsa_tag_driver_register(dsa_tag_driver_array[i], owner);
62}
63
64static void dsa_tag_driver_unregister(struct dsa_tag_driver *dsa_tag_driver)
65{
66 mutex_lock(&dsa_tag_drivers_lock);
67 list_del(&dsa_tag_driver->list);
68 mutex_unlock(&dsa_tag_drivers_lock);
69}
70EXPORT_SYMBOL_GPL(dsa_tag_drivers_register);
71
72void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[],
73 unsigned int count)
74{
75 unsigned int i;
76
77 for (i = 0; i < count; i++)
78 dsa_tag_driver_unregister(dsa_tag_driver_array[i]);
79}
80EXPORT_SYMBOL_GPL(dsa_tag_drivers_unregister);
81
82const char *dsa_tag_protocol_to_str(const struct dsa_device_ops *ops)
83{
84 return ops->name;
85};
86
87const struct dsa_device_ops *dsa_tag_driver_get(int tag_protocol)
88{
89 struct dsa_tag_driver *dsa_tag_driver;
90 const struct dsa_device_ops *ops;
91 bool found = false;
92
93 request_module("%s%d", DSA_TAG_DRIVER_ALIAS, tag_protocol);
94
95 mutex_lock(&dsa_tag_drivers_lock);
96 list_for_each_entry(dsa_tag_driver, &dsa_tag_drivers_list, list) {
97 ops = dsa_tag_driver->ops;
98 if (ops->proto == tag_protocol) {
99 found = true;
100 break;
101 }
102 }
103
104 if (found) {
105 if (!try_module_get(dsa_tag_driver->owner))
106 ops = ERR_PTR(-ENOPROTOOPT);
107 } else {
108 ops = ERR_PTR(-ENOPROTOOPT);
109 }
110
111 mutex_unlock(&dsa_tag_drivers_lock);
112
113 return ops;
114}
115
116void dsa_tag_driver_put(const struct dsa_device_ops *ops)
117{
118 struct dsa_tag_driver *dsa_tag_driver;
119
120 mutex_lock(&dsa_tag_drivers_lock);
121 list_for_each_entry(dsa_tag_driver, &dsa_tag_drivers_list, list) {
122 if (dsa_tag_driver->ops == ops) {
123 module_put(dsa_tag_driver->owner);
124 break;
125 }
126 }
127 mutex_unlock(&dsa_tag_drivers_lock);
128}
129
130static int dev_is_class(struct device *dev, void *class)
131{
132 if (dev->class != NULL && !strcmp(dev->class->name, class))
133 return 1;
134
135 return 0;
136}
137
138static struct device *dev_find_class(struct device *parent, char *class)
139{
140 if (dev_is_class(parent, class)) {
141 get_device(parent);
142 return parent;
143 }
144
145 return device_find_child(parent, class, dev_is_class);
146}
147
148struct net_device *dsa_dev_to_net_device(struct device *dev)
149{
150 struct device *d;
151
152 d = dev_find_class(dev, "net");
153 if (d != NULL) {
154 struct net_device *nd;
155
156 nd = to_net_dev(d);
157 dev_hold(nd);
158 put_device(d);
159
160 return nd;
161 }
162
163 return NULL;
164}
165EXPORT_SYMBOL_GPL(dsa_dev_to_net_device);
166
167/* Determine if we should defer delivery of skb until we have a rx timestamp.
168 *
169 * Called from dsa_switch_rcv. For now, this will only work if tagging is
170 * enabled on the switch. Normally the MAC driver would retrieve the hardware
171 * timestamp when it reads the packet out of the hardware. However in a DSA
172 * switch, the DSA driver owning the interface to which the packet is
173 * delivered is never notified unless we do so here.
174 */
175static bool dsa_skb_defer_rx_timestamp(struct dsa_slave_priv *p,
176 struct sk_buff *skb)
177{
178 struct dsa_switch *ds = p->dp->ds;
179 unsigned int type;
180
181 if (skb_headroom(skb) < ETH_HLEN)
182 return false;
183
184 __skb_push(skb, ETH_HLEN);
185
186 type = ptp_classify_raw(skb);
187
188 __skb_pull(skb, ETH_HLEN);
189
190 if (type == PTP_CLASS_NONE)
191 return false;
192
193 if (likely(ds->ops->port_rxtstamp))
194 return ds->ops->port_rxtstamp(ds, p->dp->index, skb, type);
195
196 return false;
197}
198
199static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev,
200 struct packet_type *pt, struct net_device *unused)
201{
202 struct dsa_port *cpu_dp = dev->dsa_ptr;
203 struct sk_buff *nskb = NULL;
204 struct pcpu_sw_netstats *s;
205 struct dsa_slave_priv *p;
206
207 if (unlikely(!cpu_dp)) {
208 kfree_skb(skb);
209 return 0;
210 }
211
212 skb = skb_unshare(skb, GFP_ATOMIC);
213 if (!skb)
214 return 0;
215
216 nskb = cpu_dp->rcv(skb, dev, pt);
217 if (!nskb) {
218 kfree_skb(skb);
219 return 0;
220 }
221
222 skb = nskb;
223 p = netdev_priv(skb->dev);
224 skb_push(skb, ETH_HLEN);
225 skb->pkt_type = PACKET_HOST;
226 skb->protocol = eth_type_trans(skb, skb->dev);
227
228 s = this_cpu_ptr(p->stats64);
229 u64_stats_update_begin(&s->syncp);
230 s->rx_packets++;
231 s->rx_bytes += skb->len;
232 u64_stats_update_end(&s->syncp);
233
234 if (dsa_skb_defer_rx_timestamp(p, skb))
235 return 0;
236
237 gro_cells_receive(&p->gcells, skb);
238
239 return 0;
240}
241
242#ifdef CONFIG_PM_SLEEP
243static bool dsa_is_port_initialized(struct dsa_switch *ds, int p)
244{
245 const struct dsa_port *dp = dsa_to_port(ds, p);
246
247 return dp->type == DSA_PORT_TYPE_USER && dp->slave;
248}
249
250int dsa_switch_suspend(struct dsa_switch *ds)
251{
252 int i, ret = 0;
253
254 /* Suspend slave network devices */
255 for (i = 0; i < ds->num_ports; i++) {
256 if (!dsa_is_port_initialized(ds, i))
257 continue;
258
259 ret = dsa_slave_suspend(dsa_to_port(ds, i)->slave);
260 if (ret)
261 return ret;
262 }
263
264 if (ds->ops->suspend)
265 ret = ds->ops->suspend(ds);
266
267 return ret;
268}
269EXPORT_SYMBOL_GPL(dsa_switch_suspend);
270
271int dsa_switch_resume(struct dsa_switch *ds)
272{
273 int i, ret = 0;
274
275 if (ds->ops->resume)
276 ret = ds->ops->resume(ds);
277
278 if (ret)
279 return ret;
280
281 /* Resume slave network devices */
282 for (i = 0; i < ds->num_ports; i++) {
283 if (!dsa_is_port_initialized(ds, i))
284 continue;
285
286 ret = dsa_slave_resume(dsa_to_port(ds, i)->slave);
287 if (ret)
288 return ret;
289 }
290
291 return 0;
292}
293EXPORT_SYMBOL_GPL(dsa_switch_resume);
294#endif
295
296static struct packet_type dsa_pack_type __read_mostly = {
297 .type = cpu_to_be16(ETH_P_XDSA),
298 .func = dsa_switch_rcv,
299};
300
301static struct workqueue_struct *dsa_owq;
302
303bool dsa_schedule_work(struct work_struct *work)
304{
305 return queue_work(dsa_owq, work);
306}
307
308static ATOMIC_NOTIFIER_HEAD(dsa_notif_chain);
309
310int register_dsa_notifier(struct notifier_block *nb)
311{
312 return atomic_notifier_chain_register(&dsa_notif_chain, nb);
313}
314EXPORT_SYMBOL_GPL(register_dsa_notifier);
315
316int unregister_dsa_notifier(struct notifier_block *nb)
317{
318 return atomic_notifier_chain_unregister(&dsa_notif_chain, nb);
319}
320EXPORT_SYMBOL_GPL(unregister_dsa_notifier);
321
322int call_dsa_notifiers(unsigned long val, struct net_device *dev,
323 struct dsa_notifier_info *info)
324{
325 info->dev = dev;
326 return atomic_notifier_call_chain(&dsa_notif_chain, val, info);
327}
328EXPORT_SYMBOL_GPL(call_dsa_notifiers);
329
330int dsa_devlink_param_get(struct devlink *dl, u32 id,
331 struct devlink_param_gset_ctx *ctx)
332{
333 struct dsa_devlink_priv *dl_priv;
334 struct dsa_switch *ds;
335
336 dl_priv = devlink_priv(dl);
337 ds = dl_priv->ds;
338
339 if (!ds->ops->devlink_param_get)
340 return -EOPNOTSUPP;
341
342 return ds->ops->devlink_param_get(ds, id, ctx);
343}
344EXPORT_SYMBOL_GPL(dsa_devlink_param_get);
345
346int dsa_devlink_param_set(struct devlink *dl, u32 id,
347 struct devlink_param_gset_ctx *ctx)
348{
349 struct dsa_devlink_priv *dl_priv;
350 struct dsa_switch *ds;
351
352 dl_priv = devlink_priv(dl);
353 ds = dl_priv->ds;
354
355 if (!ds->ops->devlink_param_set)
356 return -EOPNOTSUPP;
357
358 return ds->ops->devlink_param_set(ds, id, ctx);
359}
360EXPORT_SYMBOL_GPL(dsa_devlink_param_set);
361
362int dsa_devlink_params_register(struct dsa_switch *ds,
363 const struct devlink_param *params,
364 size_t params_count)
365{
366 return devlink_params_register(ds->devlink, params, params_count);
367}
368EXPORT_SYMBOL_GPL(dsa_devlink_params_register);
369
370void dsa_devlink_params_unregister(struct dsa_switch *ds,
371 const struct devlink_param *params,
372 size_t params_count)
373{
374 devlink_params_unregister(ds->devlink, params, params_count);
375}
376EXPORT_SYMBOL_GPL(dsa_devlink_params_unregister);
377
378int dsa_devlink_resource_register(struct dsa_switch *ds,
379 const char *resource_name,
380 u64 resource_size,
381 u64 resource_id,
382 u64 parent_resource_id,
383 const struct devlink_resource_size_params *size_params)
384{
385 return devlink_resource_register(ds->devlink, resource_name,
386 resource_size, resource_id,
387 parent_resource_id,
388 size_params);
389}
390EXPORT_SYMBOL_GPL(dsa_devlink_resource_register);
391
392void dsa_devlink_resources_unregister(struct dsa_switch *ds)
393{
394 devlink_resources_unregister(ds->devlink, NULL);
395}
396EXPORT_SYMBOL_GPL(dsa_devlink_resources_unregister);
397
398void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds,
399 u64 resource_id,
400 devlink_resource_occ_get_t *occ_get,
401 void *occ_get_priv)
402{
403 return devlink_resource_occ_get_register(ds->devlink, resource_id,
404 occ_get, occ_get_priv);
405}
406EXPORT_SYMBOL_GPL(dsa_devlink_resource_occ_get_register);
407
408void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds,
409 u64 resource_id)
410{
411 devlink_resource_occ_get_unregister(ds->devlink, resource_id);
412}
413EXPORT_SYMBOL_GPL(dsa_devlink_resource_occ_get_unregister);
414
415struct dsa_port *dsa_port_from_netdev(struct net_device *netdev)
416{
417 if (!netdev || !dsa_slave_dev_check(netdev))
418 return ERR_PTR(-ENODEV);
419
420 return dsa_slave_to_port(netdev);
421}
422EXPORT_SYMBOL_GPL(dsa_port_from_netdev);
423
424static int __init dsa_init_module(void)
425{
426 int rc;
427
428 dsa_owq = alloc_ordered_workqueue("dsa_ordered",
429 WQ_MEM_RECLAIM);
430 if (!dsa_owq)
431 return -ENOMEM;
432
433 rc = dsa_slave_register_notifier();
434 if (rc)
435 goto register_notifier_fail;
436
437 dev_add_pack(&dsa_pack_type);
438
439 dsa_tag_driver_register(&DSA_TAG_DRIVER_NAME(none_ops),
440 THIS_MODULE);
441
442 return 0;
443
444register_notifier_fail:
445 destroy_workqueue(dsa_owq);
446
447 return rc;
448}
449module_init(dsa_init_module);
450
451static void __exit dsa_cleanup_module(void)
452{
453 dsa_tag_driver_unregister(&DSA_TAG_DRIVER_NAME(none_ops));
454
455 dsa_slave_unregister_notifier();
456 dev_remove_pack(&dsa_pack_type);
457 destroy_workqueue(dsa_owq);
458}
459module_exit(dsa_cleanup_module);
460
461MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
462MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips");
463MODULE_LICENSE("GPL");
464MODULE_ALIAS("platform:dsa");