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