summaryrefslogtreecommitdiffstats
path: root/drivers/net/dsa/realtek/rtl8366-core.c
blob: 59f98d2c8769b981ee34e87850842a602afc6c25 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
// SPDX-License-Identifier: GPL-2.0
/* Realtek SMI library helpers for the RTL8366x variants
 * RTL8366RB and RTL8366S
 *
 * Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org>
 * Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
 * Copyright (C) 2010 Antti Seppälä <a.seppala@gmail.com>
 * Copyright (C) 2010 Roman Yeryomin <roman@advem.lv>
 * Copyright (C) 2011 Colin Leitner <colin.leitner@googlemail.com>
 */
#include <linux/if_bridge.h>
#include <net/dsa.h>

#include "realtek.h"

int rtl8366_mc_is_used(struct realtek_priv *priv, int mc_index, int *used)
{
	int ret;
	int i;

	*used = 0;
	for (i = 0; i < priv->num_ports; i++) {
		int index = 0;

		ret = priv->ops->get_mc_index(priv, i, &index);
		if (ret)
			return ret;

		if (mc_index == index) {
			*used = 1;
			break;
		}
	}

	return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_mc_is_used);

/**
 * rtl8366_obtain_mc() - retrieve or allocate a VLAN member configuration
 * @priv: the Realtek SMI device instance
 * @vid: the VLAN ID to look up or allocate
 * @vlanmc: the pointer will be assigned to a pointer to a valid member config
 * if successful
 * @return: index of a new member config or negative error number
 */
static int rtl8366_obtain_mc(struct realtek_priv *priv, int vid,
			     struct rtl8366_vlan_mc *vlanmc)
{
	struct rtl8366_vlan_4k vlan4k;
	int ret;
	int i;

	/* Try to find an existing member config entry for this VID */
	for (i = 0; i < priv->num_vlan_mc; i++) {
		ret = priv->ops->get_vlan_mc(priv, i, vlanmc);
		if (ret) {
			dev_err(priv->dev, "error searching for VLAN MC %d for VID %d\n",
				i, vid);
			return ret;
		}

		if (vid == vlanmc->vid)
			return i;
	}

	/* We have no MC entry for this VID, try to find an empty one */
	for (i = 0; i < priv->num_vlan_mc; i++) {
		ret = priv->ops->get_vlan_mc(priv, i, vlanmc);
		if (ret) {
			dev_err(priv->dev, "error searching for VLAN MC %d for VID %d\n",
				i, vid);
			return ret;
		}

		if (vlanmc->vid == 0 && vlanmc->member == 0) {
			/* Update the entry from the 4K table */
			ret = priv->ops->get_vlan_4k(priv, vid, &vlan4k);
			if (ret) {
				dev_err(priv->dev, "error looking for 4K VLAN MC %d for VID %d\n",
					i, vid);
				return ret;
			}

			vlanmc->vid = vid;
			vlanmc->member = vlan4k.member;
			vlanmc->untag = vlan4k.untag;
			vlanmc->fid = vlan4k.fid;
			ret = priv->ops->set_vlan_mc(priv, i, vlanmc);
			if (ret) {
				dev_err(priv->dev, "unable to set/update VLAN MC %d for VID %d\n",
					i, vid);
				return ret;
			}

			dev_dbg(priv->dev, "created new MC at index %d for VID %d\n",
				i, vid);
			return i;
		}
	}

	/* MC table is full, try to find an unused entry and replace it */
	for (i = 0; i < priv->num_vlan_mc; i++) {
		int used;

		ret = rtl8366_mc_is_used(priv, i, &used);
		if (ret)
			return ret;

		if (!used) {
			/* Update the entry from the 4K table */
			ret = priv->ops->get_vlan_4k(priv, vid, &vlan4k);
			if (ret)
				return ret;

			vlanmc->vid = vid;
			vlanmc->member = vlan4k.member;
			vlanmc->untag = vlan4k.untag;
			vlanmc->fid = vlan4k.fid;
			ret = priv->ops->set_vlan_mc(priv, i, vlanmc);
			if (ret) {
				dev_err(priv->dev, "unable to set/update VLAN MC %d for VID %d\n",
					i, vid);
				return ret;
			}
			dev_dbg(priv->dev, "recycled MC at index %i for VID %d\n",
				i, vid);
			return i;
		}
	}

	dev_err(priv->dev, "all VLAN member configurations are in use\n");
	return -ENOSPC;
}

int rtl8366_set_vlan(struct realtek_priv *priv, int vid, u32 member,
		     u32 untag, u32 fid)
{
	struct rtl8366_vlan_mc vlanmc;
	struct rtl8366_vlan_4k vlan4k;
	int mc;
	int ret;

	if (!priv->ops->is_vlan_valid(priv, vid))
		return -EINVAL;

	dev_dbg(priv->dev,
		"setting VLAN%d 4k members: 0x%02x, untagged: 0x%02x\n",
		vid, member, untag);

	/* Update the 4K table */
	ret = priv->ops->get_vlan_4k(priv, vid, &vlan4k);
	if (ret)
		return ret;

	vlan4k.member |= member;
	vlan4k.untag |= untag;
	vlan4k.fid = fid;
	ret = priv->ops->set_vlan_4k(priv, &vlan4k);
	if (ret)
		return ret;

	dev_dbg(priv->dev,
		"resulting VLAN%d 4k members: 0x%02x, untagged: 0x%02x\n",
		vid, vlan4k.member, vlan4k.untag);

	/* Find or allocate a member config for this VID */
	ret = rtl8366_obtain_mc(priv, vid, &vlanmc);
	if (ret < 0)
		return ret;
	mc = ret;

	/* Update the MC entry */
	vlanmc.member |= member;
	vlanmc.untag |= untag;
	vlanmc.fid = fid;

	/* Commit updates to the MC entry */
	ret = priv->ops->set_vlan_mc(priv, mc, &vlanmc);
	if (ret)
		dev_err(priv->dev, "failed to commit changes to VLAN MC index %d for VID %d\n",
			mc, vid);
	else
		dev_dbg(priv->dev,
			"resulting VLAN%d MC members: 0x%02x, untagged: 0x%02x\n",
			vid, vlanmc.member, vlanmc.untag);

	return ret;
}
EXPORT_SYMBOL_GPL(rtl8366_set_vlan);

int rtl8366_set_pvid(struct realtek_priv *priv, unsigned int port,
		     unsigned int vid)
{
	struct rtl8366_vlan_mc vlanmc;
	int mc;
	int ret;

	if (!priv->ops->is_vlan_valid(priv, vid))
		return -EINVAL;

	/* Find or allocate a member config for this VID */
	ret = rtl8366_obtain_mc(priv, vid, &vlanmc);
	if (ret < 0)
		return ret;
	mc = ret;

	ret = priv->ops->set_mc_index(priv, port, mc);
	if (ret) {
		dev_err(priv->dev, "set PVID: failed to set MC index %d for port %d\n",
			mc, port);
		return ret;
	}

	dev_dbg(priv->dev, "set PVID: the PVID for port %d set to %d using existing MC index %d\n",
		port, vid, mc);

	return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_set_pvid);

int rtl8366_enable_vlan4k(struct realtek_priv *priv, bool enable)
{
	int ret;

	/* To enable 4k VLAN, ordinary VLAN must be enabled first,
	 * but if we disable 4k VLAN it is fine to leave ordinary
	 * VLAN enabled.
	 */
	if (enable) {
		/* Make sure VLAN is ON */
		ret = priv->ops->enable_vlan(priv, true);
		if (ret)
			return ret;

		priv->vlan_enabled = true;
	}

	ret = priv->ops->enable_vlan4k(priv, enable);
	if (ret)
		return ret;

	priv->vlan4k_enabled = enable;
	return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_enable_vlan4k);

int rtl8366_enable_vlan(struct realtek_priv *priv, bool enable)
{
	int ret;

	ret = priv->ops->enable_vlan(priv, enable);
	if (ret)
		return ret;

	priv->vlan_enabled = enable;

	/* If we turn VLAN off, make sure that we turn off
	 * 4k VLAN as well, if that happened to be on.
	 */
	if (!enable) {
		priv->vlan4k_enabled = false;
		ret = priv->ops->enable_vlan4k(priv, false);
	}

	return ret;
}
EXPORT_SYMBOL_GPL(rtl8366_enable_vlan);

int rtl8366_reset_vlan(struct realtek_priv *priv)
{
	struct rtl8366_vlan_mc vlanmc;
	int ret;
	int i;

	rtl8366_enable_vlan(priv, false);
	rtl8366_enable_vlan4k(priv, false);

	/* Clear the 16 VLAN member configurations */
	vlanmc.vid = 0;
	vlanmc.priority = 0;
	vlanmc.member = 0;
	vlanmc.untag = 0;
	vlanmc.fid = 0;
	for (i = 0; i < priv->num_vlan_mc; i++) {
		ret = priv->ops->set_vlan_mc(priv, i, &vlanmc);
		if (ret)
			return ret;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_reset_vlan);

int rtl8366_vlan_add(struct dsa_switch *ds, int port,
		     const struct switchdev_obj_port_vlan *vlan,
		     struct netlink_ext_ack *extack)
{
	bool untagged = !!(vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED);
	bool pvid = !!(vlan->flags & BRIDGE_VLAN_INFO_PVID);
	struct realtek_priv *priv = ds->priv;
	u32 member = 0;
	u32 untag = 0;
	int ret;

	if (!priv->ops->is_vlan_valid(priv, vlan->vid)) {
		NL_SET_ERR_MSG_MOD(extack, "VLAN ID not valid");
		return -EINVAL;
	}

	/* Enable VLAN in the hardware
	 * FIXME: what's with this 4k business?
	 * Just rtl8366_enable_vlan() seems inconclusive.
	 */
	ret = rtl8366_enable_vlan4k(priv, true);
	if (ret) {
		NL_SET_ERR_MSG_MOD(extack, "Failed to enable VLAN 4K");
		return ret;
	}

	dev_dbg(priv->dev, "add VLAN %d on port %d, %s, %s\n",
		vlan->vid, port, untagged ? "untagged" : "tagged",
		pvid ? "PVID" : "no PVID");

	member |= BIT(port);

	if (untagged)
		untag |= BIT(port);

	ret = rtl8366_set_vlan(priv, vlan->vid, member, untag, 0);
	if (ret) {
		dev_err(priv->dev, "failed to set up VLAN %04x", vlan->vid);
		return ret;
	}

	if (!pvid)
		return 0;

	ret = rtl8366_set_pvid(priv, port, vlan->vid);
	if (ret) {
		dev_err(priv->dev, "failed to set PVID on port %d to VLAN %04x",
			port, vlan->vid);
		return ret;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_vlan_add);

int rtl8366_vlan_del(struct dsa_switch *ds, int port,
		     const struct switchdev_obj_port_vlan *vlan)
{
	struct realtek_priv *priv = ds->priv;
	int ret, i;

	dev_dbg(priv->dev, "del VLAN %d on port %d\n", vlan->vid, port);

	for (i = 0; i < priv->num_vlan_mc; i++) {
		struct rtl8366_vlan_mc vlanmc;

		ret = priv->ops->get_vlan_mc(priv, i, &vlanmc);
		if (ret)
			return ret;

		if (vlan->vid == vlanmc.vid) {
			/* Remove this port from the VLAN */
			vlanmc.member &= ~BIT(port);
			vlanmc.untag &= ~BIT(port);
			/*
			 * If no ports are members of this VLAN
			 * anymore then clear the whole member
			 * config so it can be reused.
			 */
			if (!vlanmc.member) {
				vlanmc.vid = 0;
				vlanmc.priority = 0;
				vlanmc.fid = 0;
			}
			ret = priv->ops->set_vlan_mc(priv, i, &vlanmc);
			if (ret) {
				dev_err(priv->dev,
					"failed to remove VLAN %04x\n",
					vlan->vid);
				return ret;
			}
			break;
		}
	}

	return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_vlan_del);

void rtl8366_get_strings(struct dsa_switch *ds, int port, u32 stringset,
			 uint8_t *data)
{
	struct realtek_priv *priv = ds->priv;
	int i;

	if (port >= priv->num_ports)
		return;

	for (i = 0; i < priv->num_mib_counters; i++)
		ethtool_puts(&data, priv->mib_counters[i].name);
}
EXPORT_SYMBOL_GPL(rtl8366_get_strings);

int rtl8366_get_sset_count(struct dsa_switch *ds, int port, int sset)
{
	struct realtek_priv *priv = ds->priv;

	/* We only support SS_STATS */
	if (sset != ETH_SS_STATS)
		return 0;
	if (port >= priv->num_ports)
		return -EINVAL;

	return priv->num_mib_counters;
}
EXPORT_SYMBOL_GPL(rtl8366_get_sset_count);

void rtl8366_get_ethtool_stats(struct dsa_switch *ds, int port, uint64_t *data)
{
	struct realtek_priv *priv = ds->priv;
	int i;
	int ret;

	if (port >= priv->num_ports)
		return;

	for (i = 0; i < priv->num_mib_counters; i++) {
		struct rtl8366_mib_counter *mib;
		u64 mibvalue = 0;

		mib = &priv->mib_counters[i];
		ret = priv->ops->get_mib_counter(priv, port, mib, &mibvalue);
		if (ret) {
			dev_err(priv->dev, "error reading MIB counter %s\n",
				mib->name);
		}
		data[i] = mibvalue;
	}
}
EXPORT_SYMBOL_GPL(rtl8366_get_ethtool_stats);