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 	sdata = get_bss_sdata(sdata);
335 	if (!check_sdata_in_driver(sdata))
336 		return -EIO;
337 
338 	trace_drv_ampdu_action(local, sdata, params);
339 
340 	if (local->ops->ampdu_action)
341 		ret = local->ops->ampdu_action(&local->hw, &sdata->vif, params);
342 
343 	trace_drv_return_int(local, ret);
344 
345 	return ret;
346 }
347