1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
5 */
6
7 #include "mt7601u.h"
8 #include "mac.h"
9 #include <linux/etherdevice.h>
10
mt7601u_start(struct ieee80211_hw * hw)11 static int mt7601u_start(struct ieee80211_hw *hw)
12 {
13 struct mt7601u_dev *dev = hw->priv;
14 int ret;
15
16 mutex_lock(&dev->mutex);
17
18 ret = mt7601u_mac_start(dev);
19 if (ret)
20 goto out;
21
22 ieee80211_queue_delayed_work(dev->hw, &dev->mac_work,
23 MT_CALIBRATE_INTERVAL);
24 ieee80211_queue_delayed_work(dev->hw, &dev->cal_work,
25 MT_CALIBRATE_INTERVAL);
26 out:
27 mutex_unlock(&dev->mutex);
28 return ret;
29 }
30
mt7601u_stop(struct ieee80211_hw * hw,bool suspend)31 static void mt7601u_stop(struct ieee80211_hw *hw, bool suspend)
32 {
33 struct mt7601u_dev *dev = hw->priv;
34
35 mutex_lock(&dev->mutex);
36
37 cancel_delayed_work_sync(&dev->cal_work);
38 cancel_delayed_work_sync(&dev->mac_work);
39 mt7601u_mac_stop(dev);
40
41 mutex_unlock(&dev->mutex);
42 }
43
mt7601u_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)44 static int mt7601u_add_interface(struct ieee80211_hw *hw,
45 struct ieee80211_vif *vif)
46 {
47 struct mt7601u_dev *dev = hw->priv;
48 struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
49 unsigned int idx = 0;
50 unsigned int wcid = GROUP_WCID(idx);
51
52 /* Note: for AP do the AP-STA things mt76 does:
53 * - beacon offsets
54 * - do mac address tricks
55 * - shift vif idx
56 */
57 mvif->idx = idx;
58
59 if (!ether_addr_equal(dev->macaddr, vif->addr))
60 mt7601u_set_macaddr(dev, vif->addr);
61
62 if (dev->wcid_mask[wcid / BITS_PER_LONG] & BIT(wcid % BITS_PER_LONG))
63 return -ENOSPC;
64 dev->wcid_mask[wcid / BITS_PER_LONG] |= BIT(wcid % BITS_PER_LONG);
65 mvif->group_wcid.idx = wcid;
66 mvif->group_wcid.hw_key_idx = -1;
67
68 return 0;
69 }
70
mt7601u_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)71 static void mt7601u_remove_interface(struct ieee80211_hw *hw,
72 struct ieee80211_vif *vif)
73 {
74 struct mt7601u_dev *dev = hw->priv;
75 struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
76 unsigned int wcid = mvif->group_wcid.idx;
77
78 dev->wcid_mask[wcid / BITS_PER_LONG] &= ~BIT(wcid % BITS_PER_LONG);
79 }
80
mt7601u_config(struct ieee80211_hw * hw,u32 changed)81 static int mt7601u_config(struct ieee80211_hw *hw, u32 changed)
82 {
83 struct mt7601u_dev *dev = hw->priv;
84 int ret = 0;
85
86 mutex_lock(&dev->mutex);
87
88 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
89 ieee80211_stop_queues(hw);
90 ret = mt7601u_phy_set_channel(dev, &hw->conf.chandef);
91 ieee80211_wake_queues(hw);
92 }
93
94 mutex_unlock(&dev->mutex);
95
96 return ret;
97 }
98
99 static void
mt76_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * total_flags,u64 multicast)100 mt76_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
101 unsigned int *total_flags, u64 multicast)
102 {
103 struct mt7601u_dev *dev = hw->priv;
104 u32 flags = 0;
105
106 #define MT76_FILTER(_flag, _hw) do { \
107 flags |= *total_flags & FIF_##_flag; \
108 dev->rxfilter &= ~(_hw); \
109 dev->rxfilter |= !(flags & FIF_##_flag) * (_hw); \
110 } while (0)
111
112 mutex_lock(&dev->mutex);
113
114 dev->rxfilter &= ~MT_RX_FILTR_CFG_OTHER_BSS;
115
116 MT76_FILTER(OTHER_BSS, MT_RX_FILTR_CFG_PROMISC);
117 MT76_FILTER(FCSFAIL, MT_RX_FILTR_CFG_CRC_ERR);
118 MT76_FILTER(PLCPFAIL, MT_RX_FILTR_CFG_PHY_ERR);
119 MT76_FILTER(CONTROL, MT_RX_FILTR_CFG_ACK |
120 MT_RX_FILTR_CFG_CTS |
121 MT_RX_FILTR_CFG_CFEND |
122 MT_RX_FILTR_CFG_CFACK |
123 MT_RX_FILTR_CFG_BA |
124 MT_RX_FILTR_CFG_CTRL_RSV);
125 MT76_FILTER(PSPOLL, MT_RX_FILTR_CFG_PSPOLL);
126
127 *total_flags = flags;
128 mt76_wr(dev, MT_RX_FILTR_CFG, dev->rxfilter);
129
130 mutex_unlock(&dev->mutex);
131 }
132
133 static void
mt7601u_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * info,u64 changed)134 mt7601u_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
135 struct ieee80211_bss_conf *info, u64 changed)
136 {
137 struct mt7601u_dev *dev = hw->priv;
138
139 mutex_lock(&dev->mutex);
140
141 if (changed & BSS_CHANGED_ASSOC)
142 mt7601u_phy_con_cal_onoff(dev, info);
143
144 if (changed & BSS_CHANGED_BSSID) {
145 mt7601u_addr_wr(dev, MT_MAC_BSSID_DW0, info->bssid);
146
147 /* Note: this is a hack because beacon_int is not changed
148 * on leave nor is any more appropriate event generated.
149 * rt2x00 doesn't seem to be bothered though.
150 */
151 if (is_zero_ether_addr(info->bssid))
152 mt7601u_mac_config_tsf(dev, false, 0);
153 }
154
155 if (changed & BSS_CHANGED_BASIC_RATES) {
156 mt7601u_wr(dev, MT_LEGACY_BASIC_RATE, info->basic_rates);
157 mt7601u_wr(dev, MT_HT_FBK_CFG0, 0x65432100);
158 mt7601u_wr(dev, MT_HT_FBK_CFG1, 0xedcba980);
159 mt7601u_wr(dev, MT_LG_FBK_CFG0, 0xedcba988);
160 mt7601u_wr(dev, MT_LG_FBK_CFG1, 0x00002100);
161 }
162
163 if (changed & BSS_CHANGED_BEACON_INT)
164 mt7601u_mac_config_tsf(dev, true, info->beacon_int);
165
166 if (changed & BSS_CHANGED_HT || changed & BSS_CHANGED_ERP_CTS_PROT)
167 mt7601u_mac_set_protection(dev, info->use_cts_prot,
168 info->ht_operation_mode);
169
170 if (changed & BSS_CHANGED_ERP_PREAMBLE)
171 mt7601u_mac_set_short_preamble(dev, info->use_short_preamble);
172
173 if (changed & BSS_CHANGED_ERP_SLOT) {
174 int slottime = info->use_short_slot ? 9 : 20;
175
176 mt76_rmw_field(dev, MT_BKOFF_SLOT_CFG,
177 MT_BKOFF_SLOT_CFG_SLOTTIME, slottime);
178 }
179
180 if (changed & BSS_CHANGED_ASSOC)
181 mt7601u_phy_recalibrate_after_assoc(dev);
182
183 mutex_unlock(&dev->mutex);
184 }
185
186 static int
mt76_wcid_alloc(struct mt7601u_dev * dev)187 mt76_wcid_alloc(struct mt7601u_dev *dev)
188 {
189 int i, idx = 0;
190
191 for (i = 0; i < ARRAY_SIZE(dev->wcid_mask); i++) {
192 idx = ffs(~dev->wcid_mask[i]);
193 if (!idx)
194 continue;
195
196 idx--;
197 dev->wcid_mask[i] |= BIT(idx);
198 break;
199 }
200
201 idx = i * BITS_PER_LONG + idx;
202 if (idx > 119)
203 return -1;
204
205 return idx;
206 }
207
208 static int
mt7601u_sta_add(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)209 mt7601u_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
210 struct ieee80211_sta *sta)
211 {
212 struct mt7601u_dev *dev = hw->priv;
213 struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
214 struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
215 int ret = 0;
216 int idx = 0;
217
218 mutex_lock(&dev->mutex);
219
220 idx = mt76_wcid_alloc(dev);
221 if (idx < 0) {
222 ret = -ENOSPC;
223 goto out;
224 }
225
226 msta->wcid.idx = idx;
227 msta->wcid.hw_key_idx = -1;
228 mt7601u_mac_wcid_setup(dev, idx, mvif->idx, sta->addr);
229 mt76_clear(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx));
230 rcu_assign_pointer(dev->wcid[idx], &msta->wcid);
231 mt7601u_mac_set_ampdu_factor(dev);
232
233 out:
234 mutex_unlock(&dev->mutex);
235
236 return ret;
237 }
238
239 static int
mt7601u_sta_remove(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)240 mt7601u_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
241 struct ieee80211_sta *sta)
242 {
243 struct mt7601u_dev *dev = hw->priv;
244 struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
245 int idx = msta->wcid.idx;
246
247 mutex_lock(&dev->mutex);
248 rcu_assign_pointer(dev->wcid[idx], NULL);
249 mt76_set(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx));
250 dev->wcid_mask[idx / BITS_PER_LONG] &= ~BIT(idx % BITS_PER_LONG);
251 mt7601u_mac_wcid_setup(dev, idx, 0, NULL);
252 mt7601u_mac_set_ampdu_factor(dev);
253 mutex_unlock(&dev->mutex);
254
255 return 0;
256 }
257
258 static void
mt7601u_sta_notify(struct ieee80211_hw * hw,struct ieee80211_vif * vif,enum sta_notify_cmd cmd,struct ieee80211_sta * sta)259 mt7601u_sta_notify(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
260 enum sta_notify_cmd cmd, struct ieee80211_sta *sta)
261 {
262 }
263
264 static void
mt7601u_sw_scan(struct ieee80211_hw * hw,struct ieee80211_vif * vif,const u8 * mac_addr)265 mt7601u_sw_scan(struct ieee80211_hw *hw,
266 struct ieee80211_vif *vif,
267 const u8 *mac_addr)
268 {
269 struct mt7601u_dev *dev = hw->priv;
270
271 mt7601u_agc_save(dev);
272 set_bit(MT7601U_STATE_SCANNING, &dev->state);
273 }
274
275 static void
mt7601u_sw_scan_complete(struct ieee80211_hw * hw,struct ieee80211_vif * vif)276 mt7601u_sw_scan_complete(struct ieee80211_hw *hw,
277 struct ieee80211_vif *vif)
278 {
279 struct mt7601u_dev *dev = hw->priv;
280
281 mt7601u_agc_restore(dev);
282 clear_bit(MT7601U_STATE_SCANNING, &dev->state);
283
284 ieee80211_queue_delayed_work(dev->hw, &dev->cal_work,
285 MT_CALIBRATE_INTERVAL);
286 if (dev->freq_cal.enabled)
287 ieee80211_queue_delayed_work(dev->hw, &dev->freq_cal.work,
288 MT_FREQ_CAL_INIT_DELAY);
289 }
290
291 static int
mt7601u_set_key(struct ieee80211_hw * hw,enum set_key_cmd cmd,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * key)292 mt7601u_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
293 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
294 struct ieee80211_key_conf *key)
295 {
296 struct mt7601u_dev *dev = hw->priv;
297 struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
298 struct mt76_sta *msta = sta ? (struct mt76_sta *) sta->drv_priv : NULL;
299 struct mt76_wcid *wcid = msta ? &msta->wcid : &mvif->group_wcid;
300 int idx = key->keyidx;
301 int ret;
302
303 /* fall back to sw encryption for unsupported ciphers */
304 switch (key->cipher) {
305 case WLAN_CIPHER_SUITE_WEP40:
306 case WLAN_CIPHER_SUITE_WEP104:
307 case WLAN_CIPHER_SUITE_TKIP:
308 case WLAN_CIPHER_SUITE_CCMP:
309 break;
310 default:
311 return -EOPNOTSUPP;
312 }
313
314 if (cmd == SET_KEY) {
315 key->hw_key_idx = wcid->idx;
316 wcid->hw_key_idx = idx;
317 } else {
318 if (idx == wcid->hw_key_idx)
319 wcid->hw_key_idx = -1;
320
321 key = NULL;
322 }
323
324 if (!msta) {
325 if (key || wcid->hw_key_idx == idx) {
326 ret = mt76_mac_wcid_set_key(dev, wcid->idx, key);
327 if (ret)
328 return ret;
329 }
330
331 return mt76_mac_shared_key_setup(dev, mvif->idx, idx, key);
332 }
333
334 return mt76_mac_wcid_set_key(dev, msta->wcid.idx, key);
335 }
336
mt7601u_set_rts_threshold(struct ieee80211_hw * hw,u32 value)337 static int mt7601u_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
338 {
339 struct mt7601u_dev *dev = hw->priv;
340
341 mt76_rmw_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH, value);
342
343 return 0;
344 }
345
346 static int
mt76_ampdu_action(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_ampdu_params * params)347 mt76_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
348 struct ieee80211_ampdu_params *params)
349 {
350 struct mt7601u_dev *dev = hw->priv;
351 struct ieee80211_sta *sta = params->sta;
352 enum ieee80211_ampdu_mlme_action action = params->action;
353 u16 tid = params->tid;
354 u16 ssn = params->ssn;
355 struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
356
357 WARN_ON(msta->wcid.idx > GROUP_WCID(0));
358
359 switch (action) {
360 case IEEE80211_AMPDU_RX_START:
361 mt76_set(dev, MT_WCID_ADDR(msta->wcid.idx) + 4, BIT(16 + tid));
362 break;
363 case IEEE80211_AMPDU_RX_STOP:
364 mt76_clear(dev, MT_WCID_ADDR(msta->wcid.idx) + 4,
365 BIT(16 + tid));
366 break;
367 case IEEE80211_AMPDU_TX_OPERATIONAL:
368 ieee80211_send_bar(vif, sta->addr, tid, msta->agg_ssn[tid]);
369 break;
370 case IEEE80211_AMPDU_TX_STOP_FLUSH:
371 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
372 break;
373 case IEEE80211_AMPDU_TX_START:
374 msta->agg_ssn[tid] = ssn << 4;
375 return IEEE80211_AMPDU_TX_START_IMMEDIATE;
376 case IEEE80211_AMPDU_TX_STOP_CONT:
377 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
378 break;
379 }
380
381 return 0;
382 }
383
384 static void
mt76_sta_rate_tbl_update(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)385 mt76_sta_rate_tbl_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
386 struct ieee80211_sta *sta)
387 {
388 struct mt7601u_dev *dev = hw->priv;
389 struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
390 struct ieee80211_sta_rates *rates;
391 struct ieee80211_tx_rate rate = {};
392
393 rcu_read_lock();
394 rates = rcu_dereference(sta->rates);
395
396 if (!rates)
397 goto out;
398
399 rate.idx = rates->rate[0].idx;
400 rate.flags = rates->rate[0].flags;
401 mt76_mac_wcid_set_rate(dev, &msta->wcid, &rate);
402
403 out:
404 rcu_read_unlock();
405 }
406
407 const struct ieee80211_ops mt7601u_ops = {
408 .add_chanctx = ieee80211_emulate_add_chanctx,
409 .remove_chanctx = ieee80211_emulate_remove_chanctx,
410 .change_chanctx = ieee80211_emulate_change_chanctx,
411 .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
412 .tx = mt7601u_tx,
413 .wake_tx_queue = ieee80211_handle_wake_tx_queue,
414 .start = mt7601u_start,
415 .stop = mt7601u_stop,
416 .add_interface = mt7601u_add_interface,
417 .remove_interface = mt7601u_remove_interface,
418 .config = mt7601u_config,
419 .configure_filter = mt76_configure_filter,
420 .bss_info_changed = mt7601u_bss_info_changed,
421 .sta_add = mt7601u_sta_add,
422 .sta_remove = mt7601u_sta_remove,
423 .sta_notify = mt7601u_sta_notify,
424 .set_key = mt7601u_set_key,
425 .conf_tx = mt7601u_conf_tx,
426 .sw_scan_start = mt7601u_sw_scan,
427 .sw_scan_complete = mt7601u_sw_scan_complete,
428 .ampdu_action = mt76_ampdu_action,
429 .sta_rate_tbl_update = mt76_sta_rate_tbl_update,
430 .set_rts_threshold = mt7601u_set_rts_threshold,
431 };
432