1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2015 Intel Deutschland GmbH
4 */
5 #include <net/mac80211.h>
6 #include "ieee80211_i.h"
7 #include "trace.h"
8 #include "driver-ops.h"
9
drv_start(struct ieee80211_local * local)10 int drv_start(struct ieee80211_local *local)
11 {
12 int ret;
13
14 might_sleep();
15
16 if (WARN_ON(local->started))
17 return -EALREADY;
18
19 trace_drv_start(local);
20 local->started = true;
21 /* allow rx frames */
22 smp_mb();
23 ret = local->ops->start(&local->hw);
24 trace_drv_return_int(local, ret);
25
26 if (ret)
27 local->started = false;
28
29 return ret;
30 }
31
drv_stop(struct ieee80211_local * local)32 void drv_stop(struct ieee80211_local *local)
33 {
34 might_sleep();
35
36 if (WARN_ON(!local->started))
37 return;
38
39 trace_drv_stop(local);
40 local->ops->stop(&local->hw);
41 trace_drv_return_void(local);
42
43 /* sync away all work on the tasklet before clearing started */
44 tasklet_disable(&local->tasklet);
45 tasklet_enable(&local->tasklet);
46
47 barrier();
48
49 local->started = false;
50 }
51
drv_add_interface(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)52 int drv_add_interface(struct ieee80211_local *local,
53 struct ieee80211_sub_if_data *sdata)
54 {
55 int ret;
56
57 might_sleep();
58
59 if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
60 (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
61 !ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF) &&
62 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))))
63 return -EINVAL;
64
65 trace_drv_add_interface(local, sdata);
66 ret = local->ops->add_interface(&local->hw, &sdata->vif);
67 trace_drv_return_int(local, ret);
68
69 if (ret == 0)
70 sdata->flags |= IEEE80211_SDATA_IN_DRIVER;
71
72 return ret;
73 }
74
drv_change_interface(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,enum nl80211_iftype type,bool p2p)75 int drv_change_interface(struct ieee80211_local *local,
76 struct ieee80211_sub_if_data *sdata,
77 enum nl80211_iftype type, bool p2p)
78 {
79 int ret;
80
81 might_sleep();
82
83 if (!check_sdata_in_driver(sdata))
84 return -EIO;
85
86 trace_drv_change_interface(local, sdata, type, p2p);
87 ret = local->ops->change_interface(&local->hw, &sdata->vif, type, p2p);
88 trace_drv_return_int(local, ret);
89 return ret;
90 }
91
drv_remove_interface(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)92 void drv_remove_interface(struct ieee80211_local *local,
93 struct ieee80211_sub_if_data *sdata)
94 {
95 might_sleep();
96
97 if (!check_sdata_in_driver(sdata))
98 return;
99
100 trace_drv_remove_interface(local, sdata);
101 local->ops->remove_interface(&local->hw, &sdata->vif);
102 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
103 trace_drv_return_void(local);
104 }
105
106 __must_check
drv_sta_state(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,struct sta_info * sta,enum ieee80211_sta_state old_state,enum ieee80211_sta_state new_state)107 int drv_sta_state(struct ieee80211_local *local,
108 struct ieee80211_sub_if_data *sdata,
109 struct sta_info *sta,
110 enum ieee80211_sta_state old_state,
111 enum ieee80211_sta_state new_state)
112 {
113 int ret = 0;
114
115 might_sleep();
116
117 sdata = get_bss_sdata(sdata);
118 if (!check_sdata_in_driver(sdata))
119 return -EIO;
120
121 trace_drv_sta_state(local, sdata, &sta->sta, old_state, new_state);
122 if (local->ops->sta_state) {
123 ret = local->ops->sta_state(&local->hw, &sdata->vif, &sta->sta,
124 old_state, new_state);
125 } else if (old_state == IEEE80211_STA_AUTH &&
126 new_state == IEEE80211_STA_ASSOC) {
127 ret = drv_sta_add(local, sdata, &sta->sta);
128 if (ret == 0) {
129 sta->uploaded = true;
130 if (rcu_access_pointer(sta->sta.rates))
131 drv_sta_rate_tbl_update(local, sdata, &sta->sta);
132 }
133 } else if (old_state == IEEE80211_STA_ASSOC &&
134 new_state == IEEE80211_STA_AUTH) {
135 drv_sta_remove(local, sdata, &sta->sta);
136 }
137 trace_drv_return_int(local, ret);
138 return ret;
139 }
140
141 __must_check
drv_sta_set_txpwr(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,struct sta_info * sta)142 int drv_sta_set_txpwr(struct ieee80211_local *local,
143 struct ieee80211_sub_if_data *sdata,
144 struct sta_info *sta)
145 {
146 int ret = -EOPNOTSUPP;
147
148 might_sleep();
149
150 sdata = get_bss_sdata(sdata);
151 if (!check_sdata_in_driver(sdata))
152 return -EIO;
153
154 trace_drv_sta_set_txpwr(local, sdata, &sta->sta);
155 if (local->ops->sta_set_txpwr)
156 ret = local->ops->sta_set_txpwr(&local->hw, &sdata->vif,
157 &sta->sta);
158 trace_drv_return_int(local, ret);
159 return ret;
160 }
161
drv_sta_rc_update(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,struct ieee80211_sta * sta,u32 changed)162 void drv_sta_rc_update(struct ieee80211_local *local,
163 struct ieee80211_sub_if_data *sdata,
164 struct ieee80211_sta *sta, u32 changed)
165 {
166 sdata = get_bss_sdata(sdata);
167 if (!check_sdata_in_driver(sdata))
168 return;
169
170 WARN_ON(changed & IEEE80211_RC_SUPP_RATES_CHANGED &&
171 (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
172 sdata->vif.type != NL80211_IFTYPE_MESH_POINT));
173
174 trace_drv_sta_rc_update(local, sdata, sta, changed);
175 if (local->ops->sta_rc_update)
176 local->ops->sta_rc_update(&local->hw, &sdata->vif,
177 sta, changed);
178
179 trace_drv_return_void(local);
180 }
181
drv_conf_tx(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,u16 ac,const struct ieee80211_tx_queue_params * params)182 int drv_conf_tx(struct ieee80211_local *local,
183 struct ieee80211_sub_if_data *sdata, u16 ac,
184 const struct ieee80211_tx_queue_params *params)
185 {
186 int ret = -EOPNOTSUPP;
187
188 might_sleep();
189
190 if (!check_sdata_in_driver(sdata))
191 return -EIO;
192
193 if (params->cw_min == 0 || params->cw_min > params->cw_max) {
194 /*
195 * If we can't configure hardware anyway, don't warn. We may
196 * never have initialized the CW parameters.
197 */
198 WARN_ONCE(local->ops->conf_tx,
199 "%s: invalid CW_min/CW_max: %d/%d\n",
200 sdata->name, params->cw_min, params->cw_max);
201 return -EINVAL;
202 }
203
204 trace_drv_conf_tx(local, sdata, ac, params);
205 if (local->ops->conf_tx)
206 ret = local->ops->conf_tx(&local->hw, &sdata->vif,
207 ac, params);
208 trace_drv_return_int(local, ret);
209 return ret;
210 }
211
drv_get_tsf(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)212 u64 drv_get_tsf(struct ieee80211_local *local,
213 struct ieee80211_sub_if_data *sdata)
214 {
215 u64 ret = -1ULL;
216
217 might_sleep();
218
219 if (!check_sdata_in_driver(sdata))
220 return ret;
221
222 trace_drv_get_tsf(local, sdata);
223 if (local->ops->get_tsf)
224 ret = local->ops->get_tsf(&local->hw, &sdata->vif);
225 trace_drv_return_u64(local, ret);
226 return ret;
227 }
228
drv_set_tsf(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,u64 tsf)229 void drv_set_tsf(struct ieee80211_local *local,
230 struct ieee80211_sub_if_data *sdata,
231 u64 tsf)
232 {
233 might_sleep();
234
235 if (!check_sdata_in_driver(sdata))
236 return;
237
238 trace_drv_set_tsf(local, sdata, tsf);
239 if (local->ops->set_tsf)
240 local->ops->set_tsf(&local->hw, &sdata->vif, tsf);
241 trace_drv_return_void(local);
242 }
243
drv_offset_tsf(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,s64 offset)244 void drv_offset_tsf(struct ieee80211_local *local,
245 struct ieee80211_sub_if_data *sdata,
246 s64 offset)
247 {
248 might_sleep();
249
250 if (!check_sdata_in_driver(sdata))
251 return;
252
253 trace_drv_offset_tsf(local, sdata, offset);
254 if (local->ops->offset_tsf)
255 local->ops->offset_tsf(&local->hw, &sdata->vif, offset);
256 trace_drv_return_void(local);
257 }
258
drv_reset_tsf(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata)259 void drv_reset_tsf(struct ieee80211_local *local,
260 struct ieee80211_sub_if_data *sdata)
261 {
262 might_sleep();
263
264 if (!check_sdata_in_driver(sdata))
265 return;
266
267 trace_drv_reset_tsf(local, sdata);
268 if (local->ops->reset_tsf)
269 local->ops->reset_tsf(&local->hw, &sdata->vif);
270 trace_drv_return_void(local);
271 }
272
drv_switch_vif_chanctx(struct ieee80211_local * local,struct ieee80211_vif_chanctx_switch * vifs,int n_vifs,enum ieee80211_chanctx_switch_mode mode)273 int drv_switch_vif_chanctx(struct ieee80211_local *local,
274 struct ieee80211_vif_chanctx_switch *vifs,
275 int n_vifs, enum ieee80211_chanctx_switch_mode mode)
276 {
277 int ret = 0;
278 int i;
279
280 might_sleep();
281
282 if (!local->ops->switch_vif_chanctx)
283 return -EOPNOTSUPP;
284
285 for (i = 0; i < n_vifs; i++) {
286 struct ieee80211_chanctx *new_ctx =
287 container_of(vifs[i].new_ctx,
288 struct ieee80211_chanctx,
289 conf);
290 struct ieee80211_chanctx *old_ctx =
291 container_of(vifs[i].old_ctx,
292 struct ieee80211_chanctx,
293 conf);
294
295 WARN_ON_ONCE(!old_ctx->driver_present);
296 WARN_ON_ONCE((mode == CHANCTX_SWMODE_SWAP_CONTEXTS &&
297 new_ctx->driver_present) ||
298 (mode == CHANCTX_SWMODE_REASSIGN_VIF &&
299 !new_ctx->driver_present));
300 }
301
302 trace_drv_switch_vif_chanctx(local, vifs, n_vifs, mode);
303 ret = local->ops->switch_vif_chanctx(&local->hw,
304 vifs, n_vifs, mode);
305 trace_drv_return_int(local, ret);
306
307 if (!ret && mode == CHANCTX_SWMODE_SWAP_CONTEXTS) {
308 for (i = 0; i < n_vifs; i++) {
309 struct ieee80211_chanctx *new_ctx =
310 container_of(vifs[i].new_ctx,
311 struct ieee80211_chanctx,
312 conf);
313 struct ieee80211_chanctx *old_ctx =
314 container_of(vifs[i].old_ctx,
315 struct ieee80211_chanctx,
316 conf);
317
318 new_ctx->driver_present = true;
319 old_ctx->driver_present = false;
320 }
321 }
322
323 return ret;
324 }
325
drv_ampdu_action(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,struct ieee80211_ampdu_params * params)326 int drv_ampdu_action(struct ieee80211_local *local,
327 struct ieee80211_sub_if_data *sdata,
328 struct ieee80211_ampdu_params *params)
329 {
330 int ret = -EOPNOTSUPP;
331
332 might_sleep();
333
334 if (!sdata)
335 return -EIO;
336
337 sdata = get_bss_sdata(sdata);
338 if (!check_sdata_in_driver(sdata))
339 return -EIO;
340
341 trace_drv_ampdu_action(local, sdata, params);
342
343 if (local->ops->ampdu_action)
344 ret = local->ops->ampdu_action(&local->hw, &sdata->vif, params);
345
346 trace_drv_return_int(local, ret);
347
348 return ret;
349 }
350