1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* Realtek SMI library helpers for the RTL8366x variants |
3 | * RTL8366RB and RTL8366S |
4 | * |
5 | * Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org> |
6 | * Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org> |
7 | * Copyright (C) 2010 Antti Seppälä <a.seppala@gmail.com> |
8 | * Copyright (C) 2010 Roman Yeryomin <roman@advem.lv> |
9 | * Copyright (C) 2011 Colin Leitner <colin.leitner@googlemail.com> |
10 | */ |
11 | #include <linux/if_bridge.h> |
12 | #include <net/dsa.h> |
13 | |
14 | #include "realtek.h" |
15 | |
16 | int rtl8366_mc_is_used(struct realtek_priv *priv, int mc_index, int *used) |
17 | { |
18 | int ret; |
19 | int i; |
20 | |
21 | *used = 0; |
22 | for (i = 0; i < priv->num_ports; i++) { |
23 | int index = 0; |
24 | |
25 | ret = priv->ops->get_mc_index(priv, i, &index); |
26 | if (ret) |
27 | return ret; |
28 | |
29 | if (mc_index == index) { |
30 | *used = 1; |
31 | break; |
32 | } |
33 | } |
34 | |
35 | return 0; |
36 | } |
37 | EXPORT_SYMBOL_NS_GPL(rtl8366_mc_is_used, REALTEK_DSA); |
38 | |
39 | /** |
40 | * rtl8366_obtain_mc() - retrieve or allocate a VLAN member configuration |
41 | * @priv: the Realtek SMI device instance |
42 | * @vid: the VLAN ID to look up or allocate |
43 | * @vlanmc: the pointer will be assigned to a pointer to a valid member config |
44 | * if successful |
45 | * @return: index of a new member config or negative error number |
46 | */ |
47 | static int rtl8366_obtain_mc(struct realtek_priv *priv, int vid, |
48 | struct rtl8366_vlan_mc *vlanmc) |
49 | { |
50 | struct rtl8366_vlan_4k vlan4k; |
51 | int ret; |
52 | int i; |
53 | |
54 | /* Try to find an existing member config entry for this VID */ |
55 | for (i = 0; i < priv->num_vlan_mc; i++) { |
56 | ret = priv->ops->get_vlan_mc(priv, i, vlanmc); |
57 | if (ret) { |
58 | dev_err(priv->dev, "error searching for VLAN MC %d for VID %d\n" , |
59 | i, vid); |
60 | return ret; |
61 | } |
62 | |
63 | if (vid == vlanmc->vid) |
64 | return i; |
65 | } |
66 | |
67 | /* We have no MC entry for this VID, try to find an empty one */ |
68 | for (i = 0; i < priv->num_vlan_mc; i++) { |
69 | ret = priv->ops->get_vlan_mc(priv, i, vlanmc); |
70 | if (ret) { |
71 | dev_err(priv->dev, "error searching for VLAN MC %d for VID %d\n" , |
72 | i, vid); |
73 | return ret; |
74 | } |
75 | |
76 | if (vlanmc->vid == 0 && vlanmc->member == 0) { |
77 | /* Update the entry from the 4K table */ |
78 | ret = priv->ops->get_vlan_4k(priv, vid, &vlan4k); |
79 | if (ret) { |
80 | dev_err(priv->dev, "error looking for 4K VLAN MC %d for VID %d\n" , |
81 | i, vid); |
82 | return ret; |
83 | } |
84 | |
85 | vlanmc->vid = vid; |
86 | vlanmc->member = vlan4k.member; |
87 | vlanmc->untag = vlan4k.untag; |
88 | vlanmc->fid = vlan4k.fid; |
89 | ret = priv->ops->set_vlan_mc(priv, i, vlanmc); |
90 | if (ret) { |
91 | dev_err(priv->dev, "unable to set/update VLAN MC %d for VID %d\n" , |
92 | i, vid); |
93 | return ret; |
94 | } |
95 | |
96 | dev_dbg(priv->dev, "created new MC at index %d for VID %d\n" , |
97 | i, vid); |
98 | return i; |
99 | } |
100 | } |
101 | |
102 | /* MC table is full, try to find an unused entry and replace it */ |
103 | for (i = 0; i < priv->num_vlan_mc; i++) { |
104 | int used; |
105 | |
106 | ret = rtl8366_mc_is_used(priv, i, &used); |
107 | if (ret) |
108 | return ret; |
109 | |
110 | if (!used) { |
111 | /* Update the entry from the 4K table */ |
112 | ret = priv->ops->get_vlan_4k(priv, vid, &vlan4k); |
113 | if (ret) |
114 | return ret; |
115 | |
116 | vlanmc->vid = vid; |
117 | vlanmc->member = vlan4k.member; |
118 | vlanmc->untag = vlan4k.untag; |
119 | vlanmc->fid = vlan4k.fid; |
120 | ret = priv->ops->set_vlan_mc(priv, i, vlanmc); |
121 | if (ret) { |
122 | dev_err(priv->dev, "unable to set/update VLAN MC %d for VID %d\n" , |
123 | i, vid); |
124 | return ret; |
125 | } |
126 | dev_dbg(priv->dev, "recycled MC at index %i for VID %d\n" , |
127 | i, vid); |
128 | return i; |
129 | } |
130 | } |
131 | |
132 | dev_err(priv->dev, "all VLAN member configurations are in use\n" ); |
133 | return -ENOSPC; |
134 | } |
135 | |
136 | int rtl8366_set_vlan(struct realtek_priv *priv, int vid, u32 member, |
137 | u32 untag, u32 fid) |
138 | { |
139 | struct rtl8366_vlan_mc vlanmc; |
140 | struct rtl8366_vlan_4k vlan4k; |
141 | int mc; |
142 | int ret; |
143 | |
144 | if (!priv->ops->is_vlan_valid(priv, vid)) |
145 | return -EINVAL; |
146 | |
147 | dev_dbg(priv->dev, |
148 | "setting VLAN%d 4k members: 0x%02x, untagged: 0x%02x\n" , |
149 | vid, member, untag); |
150 | |
151 | /* Update the 4K table */ |
152 | ret = priv->ops->get_vlan_4k(priv, vid, &vlan4k); |
153 | if (ret) |
154 | return ret; |
155 | |
156 | vlan4k.member |= member; |
157 | vlan4k.untag |= untag; |
158 | vlan4k.fid = fid; |
159 | ret = priv->ops->set_vlan_4k(priv, &vlan4k); |
160 | if (ret) |
161 | return ret; |
162 | |
163 | dev_dbg(priv->dev, |
164 | "resulting VLAN%d 4k members: 0x%02x, untagged: 0x%02x\n" , |
165 | vid, vlan4k.member, vlan4k.untag); |
166 | |
167 | /* Find or allocate a member config for this VID */ |
168 | ret = rtl8366_obtain_mc(priv, vid, vlanmc: &vlanmc); |
169 | if (ret < 0) |
170 | return ret; |
171 | mc = ret; |
172 | |
173 | /* Update the MC entry */ |
174 | vlanmc.member |= member; |
175 | vlanmc.untag |= untag; |
176 | vlanmc.fid = fid; |
177 | |
178 | /* Commit updates to the MC entry */ |
179 | ret = priv->ops->set_vlan_mc(priv, mc, &vlanmc); |
180 | if (ret) |
181 | dev_err(priv->dev, "failed to commit changes to VLAN MC index %d for VID %d\n" , |
182 | mc, vid); |
183 | else |
184 | dev_dbg(priv->dev, |
185 | "resulting VLAN%d MC members: 0x%02x, untagged: 0x%02x\n" , |
186 | vid, vlanmc.member, vlanmc.untag); |
187 | |
188 | return ret; |
189 | } |
190 | EXPORT_SYMBOL_NS_GPL(rtl8366_set_vlan, REALTEK_DSA); |
191 | |
192 | int rtl8366_set_pvid(struct realtek_priv *priv, unsigned int port, |
193 | unsigned int vid) |
194 | { |
195 | struct rtl8366_vlan_mc vlanmc; |
196 | int mc; |
197 | int ret; |
198 | |
199 | if (!priv->ops->is_vlan_valid(priv, vid)) |
200 | return -EINVAL; |
201 | |
202 | /* Find or allocate a member config for this VID */ |
203 | ret = rtl8366_obtain_mc(priv, vid, vlanmc: &vlanmc); |
204 | if (ret < 0) |
205 | return ret; |
206 | mc = ret; |
207 | |
208 | ret = priv->ops->set_mc_index(priv, port, mc); |
209 | if (ret) { |
210 | dev_err(priv->dev, "set PVID: failed to set MC index %d for port %d\n" , |
211 | mc, port); |
212 | return ret; |
213 | } |
214 | |
215 | dev_dbg(priv->dev, "set PVID: the PVID for port %d set to %d using existing MC index %d\n" , |
216 | port, vid, mc); |
217 | |
218 | return 0; |
219 | } |
220 | EXPORT_SYMBOL_NS_GPL(rtl8366_set_pvid, REALTEK_DSA); |
221 | |
222 | int rtl8366_enable_vlan4k(struct realtek_priv *priv, bool enable) |
223 | { |
224 | int ret; |
225 | |
226 | /* To enable 4k VLAN, ordinary VLAN must be enabled first, |
227 | * but if we disable 4k VLAN it is fine to leave ordinary |
228 | * VLAN enabled. |
229 | */ |
230 | if (enable) { |
231 | /* Make sure VLAN is ON */ |
232 | ret = priv->ops->enable_vlan(priv, true); |
233 | if (ret) |
234 | return ret; |
235 | |
236 | priv->vlan_enabled = true; |
237 | } |
238 | |
239 | ret = priv->ops->enable_vlan4k(priv, enable); |
240 | if (ret) |
241 | return ret; |
242 | |
243 | priv->vlan4k_enabled = enable; |
244 | return 0; |
245 | } |
246 | EXPORT_SYMBOL_NS_GPL(rtl8366_enable_vlan4k, REALTEK_DSA); |
247 | |
248 | int rtl8366_enable_vlan(struct realtek_priv *priv, bool enable) |
249 | { |
250 | int ret; |
251 | |
252 | ret = priv->ops->enable_vlan(priv, enable); |
253 | if (ret) |
254 | return ret; |
255 | |
256 | priv->vlan_enabled = enable; |
257 | |
258 | /* If we turn VLAN off, make sure that we turn off |
259 | * 4k VLAN as well, if that happened to be on. |
260 | */ |
261 | if (!enable) { |
262 | priv->vlan4k_enabled = false; |
263 | ret = priv->ops->enable_vlan4k(priv, false); |
264 | } |
265 | |
266 | return ret; |
267 | } |
268 | EXPORT_SYMBOL_NS_GPL(rtl8366_enable_vlan, REALTEK_DSA); |
269 | |
270 | int rtl8366_reset_vlan(struct realtek_priv *priv) |
271 | { |
272 | struct rtl8366_vlan_mc vlanmc; |
273 | int ret; |
274 | int i; |
275 | |
276 | rtl8366_enable_vlan(priv, false); |
277 | rtl8366_enable_vlan4k(priv, false); |
278 | |
279 | /* Clear the 16 VLAN member configurations */ |
280 | vlanmc.vid = 0; |
281 | vlanmc.priority = 0; |
282 | vlanmc.member = 0; |
283 | vlanmc.untag = 0; |
284 | vlanmc.fid = 0; |
285 | for (i = 0; i < priv->num_vlan_mc; i++) { |
286 | ret = priv->ops->set_vlan_mc(priv, i, &vlanmc); |
287 | if (ret) |
288 | return ret; |
289 | } |
290 | |
291 | return 0; |
292 | } |
293 | EXPORT_SYMBOL_NS_GPL(rtl8366_reset_vlan, REALTEK_DSA); |
294 | |
295 | int rtl8366_vlan_add(struct dsa_switch *ds, int port, |
296 | const struct switchdev_obj_port_vlan *vlan, |
297 | struct netlink_ext_ack *extack) |
298 | { |
299 | bool untagged = !!(vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED); |
300 | bool pvid = !!(vlan->flags & BRIDGE_VLAN_INFO_PVID); |
301 | struct realtek_priv *priv = ds->priv; |
302 | u32 member = 0; |
303 | u32 untag = 0; |
304 | int ret; |
305 | |
306 | if (!priv->ops->is_vlan_valid(priv, vlan->vid)) { |
307 | NL_SET_ERR_MSG_MOD(extack, "VLAN ID not valid" ); |
308 | return -EINVAL; |
309 | } |
310 | |
311 | /* Enable VLAN in the hardware |
312 | * FIXME: what's with this 4k business? |
313 | * Just rtl8366_enable_vlan() seems inconclusive. |
314 | */ |
315 | ret = rtl8366_enable_vlan4k(priv, true); |
316 | if (ret) { |
317 | NL_SET_ERR_MSG_MOD(extack, "Failed to enable VLAN 4K" ); |
318 | return ret; |
319 | } |
320 | |
321 | dev_dbg(priv->dev, "add VLAN %d on port %d, %s, %s\n" , |
322 | vlan->vid, port, untagged ? "untagged" : "tagged" , |
323 | pvid ? "PVID" : "no PVID" ); |
324 | |
325 | member |= BIT(port); |
326 | |
327 | if (untagged) |
328 | untag |= BIT(port); |
329 | |
330 | ret = rtl8366_set_vlan(priv, vlan->vid, member, untag, 0); |
331 | if (ret) { |
332 | dev_err(priv->dev, "failed to set up VLAN %04x" , vlan->vid); |
333 | return ret; |
334 | } |
335 | |
336 | if (!pvid) |
337 | return 0; |
338 | |
339 | ret = rtl8366_set_pvid(priv, port, vlan->vid); |
340 | if (ret) { |
341 | dev_err(priv->dev, "failed to set PVID on port %d to VLAN %04x" , |
342 | port, vlan->vid); |
343 | return ret; |
344 | } |
345 | |
346 | return 0; |
347 | } |
348 | EXPORT_SYMBOL_NS_GPL(rtl8366_vlan_add, REALTEK_DSA); |
349 | |
350 | int rtl8366_vlan_del(struct dsa_switch *ds, int port, |
351 | const struct switchdev_obj_port_vlan *vlan) |
352 | { |
353 | struct realtek_priv *priv = ds->priv; |
354 | int ret, i; |
355 | |
356 | dev_dbg(priv->dev, "del VLAN %d on port %d\n" , vlan->vid, port); |
357 | |
358 | for (i = 0; i < priv->num_vlan_mc; i++) { |
359 | struct rtl8366_vlan_mc vlanmc; |
360 | |
361 | ret = priv->ops->get_vlan_mc(priv, i, &vlanmc); |
362 | if (ret) |
363 | return ret; |
364 | |
365 | if (vlan->vid == vlanmc.vid) { |
366 | /* Remove this port from the VLAN */ |
367 | vlanmc.member &= ~BIT(port); |
368 | vlanmc.untag &= ~BIT(port); |
369 | /* |
370 | * If no ports are members of this VLAN |
371 | * anymore then clear the whole member |
372 | * config so it can be reused. |
373 | */ |
374 | if (!vlanmc.member) { |
375 | vlanmc.vid = 0; |
376 | vlanmc.priority = 0; |
377 | vlanmc.fid = 0; |
378 | } |
379 | ret = priv->ops->set_vlan_mc(priv, i, &vlanmc); |
380 | if (ret) { |
381 | dev_err(priv->dev, |
382 | "failed to remove VLAN %04x\n" , |
383 | vlan->vid); |
384 | return ret; |
385 | } |
386 | break; |
387 | } |
388 | } |
389 | |
390 | return 0; |
391 | } |
392 | EXPORT_SYMBOL_NS_GPL(rtl8366_vlan_del, REALTEK_DSA); |
393 | |
394 | void rtl8366_get_strings(struct dsa_switch *ds, int port, u32 stringset, |
395 | uint8_t *data) |
396 | { |
397 | struct realtek_priv *priv = ds->priv; |
398 | int i; |
399 | |
400 | if (port >= priv->num_ports) |
401 | return; |
402 | |
403 | for (i = 0; i < priv->num_mib_counters; i++) |
404 | ethtool_puts(data: &data, str: priv->mib_counters[i].name); |
405 | } |
406 | EXPORT_SYMBOL_NS_GPL(rtl8366_get_strings, REALTEK_DSA); |
407 | |
408 | int rtl8366_get_sset_count(struct dsa_switch *ds, int port, int sset) |
409 | { |
410 | struct realtek_priv *priv = ds->priv; |
411 | |
412 | /* We only support SS_STATS */ |
413 | if (sset != ETH_SS_STATS) |
414 | return 0; |
415 | if (port >= priv->num_ports) |
416 | return -EINVAL; |
417 | |
418 | return priv->num_mib_counters; |
419 | } |
420 | EXPORT_SYMBOL_NS_GPL(rtl8366_get_sset_count, REALTEK_DSA); |
421 | |
422 | void rtl8366_get_ethtool_stats(struct dsa_switch *ds, int port, uint64_t *data) |
423 | { |
424 | struct realtek_priv *priv = ds->priv; |
425 | int i; |
426 | int ret; |
427 | |
428 | if (port >= priv->num_ports) |
429 | return; |
430 | |
431 | for (i = 0; i < priv->num_mib_counters; i++) { |
432 | struct rtl8366_mib_counter *mib; |
433 | u64 mibvalue = 0; |
434 | |
435 | mib = &priv->mib_counters[i]; |
436 | ret = priv->ops->get_mib_counter(priv, port, mib, &mibvalue); |
437 | if (ret) { |
438 | dev_err(priv->dev, "error reading MIB counter %s\n" , |
439 | mib->name); |
440 | } |
441 | data[i] = mibvalue; |
442 | } |
443 | } |
444 | EXPORT_SYMBOL_NS_GPL(rtl8366_get_ethtool_stats, REALTEK_DSA); |
445 | |