summaryrefslogtreecommitdiffstats
path: root/net/mac80211/driver-ops.c
blob: ca1fe5576103767c3a98b52e037c0034b949887f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
/*
 * Copyright 2015 Intel Deutschland GmbH
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <net/mac80211.h>
#include "ieee80211_i.h"
#include "trace.h"
#include "driver-ops.h"

int drv_start(struct ieee80211_local *local)
{
	int ret;

	might_sleep();

	if (WARN_ON(local->started))
		return -EALREADY;

	trace_drv_start(local);
	local->started = true;
	/* allow rx frames */
	smp_mb();
	ret = local->ops->start(&local->hw);
	trace_drv_return_int(local, ret);

	if (ret)
		local->started = false;

	return ret;
}

void drv_stop(struct ieee80211_local *local)
{
	might_sleep();

	if (WARN_ON(!local->started))
		return;

	trace_drv_stop(local);
	local->ops->stop(&local->hw);
	trace_drv_return_void(local);

	/* sync away all work on the tasklet before clearing started */
	tasklet_disable(&local->tasklet);
	tasklet_enable(&local->tasklet);

	barrier();

	local->started = false;
}

int drv_add_interface(struct ieee80211_local *local,
		      struct ieee80211_sub_if_data *sdata)
{
	int ret;

	might_sleep();

	if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
		    (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
		     !ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF) &&
		     !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))))
		return -EINVAL;

	trace_drv_add_interface(local, sdata);
	ret = local->ops->add_interface(&local->hw, &sdata->vif);
	trace_drv_return_int(local, ret);

	if (ret == 0)
		sdata->flags |= IEEE80211_SDATA_IN_DRIVER;

	return ret;
}

int drv_change_interface(struct ieee80211_local *local,
			 struct ieee80211_sub_if_data *sdata,
			 enum nl80211_iftype type, bool p2p)
{
	int ret;

	might_sleep();

	if (!check_sdata_in_driver(sdata))
		return -EIO;

	trace_drv_change_interface(local, sdata, type, p2p);
	ret = local->ops->change_interface(&local->hw, &sdata->vif, type, p2p);
	trace_drv_return_int(local, ret);
	return ret;
}

void drv_remove_interface(struct ieee80211_local *local,
			  struct ieee80211_sub_if_data *sdata)
{
	might_sleep();

	if (!check_sdata_in_driver(sdata))
		return;

	trace_drv_remove_interface(local, sdata);
	local->ops->remove_interface(&local->hw, &sdata->vif);
	sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
	trace_drv_return_void(local);
}

__must_check
int 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)
{
	int ret = 0;

	might_sleep();

	sdata = get_bss_sdata(sdata);
	if (!check_sdata_in_driver(sdata))
		return -EIO;

	trace_drv_sta_state(local, sdata, &sta->sta, old_state, new_state);
	if (local->ops->sta_state) {
		ret = local->ops->sta_state(&local->hw, &sdata->vif, &sta->sta,
					    old_state, new_state);
	} else if (old_state == IEEE80211_STA_AUTH &&
		   new_state == IEEE80211_STA_ASSOC) {
		ret = drv_sta_add(local, sdata, &sta->sta);
		if (ret == 0)
			sta->uploaded = true;
	} else if (old_state == IEEE80211_STA_ASSOC &&
		   new_state == IEEE80211_STA_AUTH) {
		drv_sta_remove(local, sdata, &sta->sta);
	}
	trace_drv_return_int(local, ret);
	return ret;
}

void drv_sta_rc_update(struct ieee80211_local *local,
		       struct ieee80211_sub_if_data *sdata,
		       struct ieee80211_sta *sta, u32 changed)
{
	sdata = get_bss_sdata(sdata);
	if (!check_sdata_in_driver(sdata))
		return;

	WARN_ON(changed & IEEE80211_RC_SUPP_RATES_CHANGED &&
		(sdata->vif.type != NL80211_IFTYPE_ADHOC &&
		 sdata->vif.type != NL80211_IFTYPE_MESH_POINT));

	trace_drv_sta_rc_update(local, sdata, sta, changed);
	if (local->ops->sta_rc_update)
		local->ops->sta_rc_update(&local->hw, &sdata->vif,
					  sta, changed);

	trace_drv_return_void(local);
}

int drv_conf_tx(struct ieee80211_local *local,
		struct ieee80211_sub_if_data *sdata, u16 ac,
		const struct ieee80211_tx_queue_params *params)
{
	int ret = -EOPNOTSUPP;

	might_sleep();

	if (!check_sdata_in_driver(sdata))
		return -EIO;

	if (WARN_ONCE(params->cw_min == 0 ||
		      params->cw_min > params->cw_max,
		      "%s: invalid CW_min/CW_max: %d/%d\n",
		      sdata->name, params->cw_min, params->cw_max))
		return -EINVAL;

	trace_drv_conf_tx(local, sdata, ac, params);
	if (local->ops->conf_tx)
		ret = local->ops->conf_tx(&local->hw, &sdata->vif,
					  ac, params);
	trace_drv_return_int(local, ret);
	return ret;
}

u64 drv_get_tsf(struct ieee80211_local *local,
		struct ieee80211_sub_if_data *sdata)
{
	u64 ret = -1ULL;

	might_sleep();

	if (!check_sdata_in_driver(sdata))
		return ret;

	trace_drv_get_tsf(local, sdata);
	if (local->ops->get_tsf)
		ret = local->ops->get_tsf(&local->hw, &sdata->vif);
	trace_drv_return_u64(local, ret);
	return ret;
}

void drv_set_tsf(struct ieee80211_local *local,
		 struct ieee80211_sub_if_data *sdata,
		 u64 tsf)
{
	might_sleep();

	if (!check_sdata_in_driver(sdata))
		return;

	trace_drv_set_tsf(local, sdata, tsf);
	if (local->ops->set_tsf)
		local->ops->set_tsf(&local->hw, &sdata->vif, tsf);
	trace_drv_return_void(local);
}

void drv_reset_tsf(struct ieee80211_local *local,
		   struct ieee80211_sub_if_data *sdata)
{
	might_sleep();

	if (!check_sdata_in_driver(sdata))
		return;

	trace_drv_reset_tsf(local, sdata);
	if (local->ops->reset_tsf)
		local->ops->reset_tsf(&local->hw, &sdata->vif);
	trace_drv_return_void(local);
}

int drv_switch_vif_chanctx(struct ieee80211_local *local,
			   struct ieee80211_vif_chanctx_switch *vifs,
			   int n_vifs, enum ieee80211_chanctx_switch_mode mode)
{
	int ret = 0;
	int i;

	might_sleep();

	if (!local->ops->switch_vif_chanctx)
		return -EOPNOTSUPP;

	for (i = 0; i < n_vifs; i++) {
		struct ieee80211_chanctx *new_ctx =
			container_of(vifs[i].new_ctx,
				     struct ieee80211_chanctx,
				     conf);
		struct ieee80211_chanctx *old_ctx =
			container_of(vifs[i].old_ctx,
				     struct ieee80211_chanctx,
				     conf);

		WARN_ON_ONCE(!old_ctx->driver_present);
		WARN_ON_ONCE((mode == CHANCTX_SWMODE_SWAP_CONTEXTS &&
			      new_ctx->driver_present) ||
			     (mode == CHANCTX_SWMODE_REASSIGN_VIF &&
			      !new_ctx->driver_present));
	}

	trace_drv_switch_vif_chanctx(local, vifs, n_vifs, mode);
	ret = local->ops->switch_vif_chanctx(&local->hw,
					     vifs, n_vifs, mode);
	trace_drv_return_int(local, ret);

	if (!ret && mode == CHANCTX_SWMODE_SWAP_CONTEXTS) {
		for (i = 0; i < n_vifs; i++) {
			struct ieee80211_chanctx *new_ctx =
				container_of(vifs[i].new_ctx,
					     struct ieee80211_chanctx,
					     conf);
			struct ieee80211_chanctx *old_ctx =
				container_of(vifs[i].old_ctx,
					     struct ieee80211_chanctx,
					     conf);

			new_ctx->driver_present = true;
			old_ctx->driver_present = false;
		}
	}

	return ret;
}

int drv_ampdu_action(struct ieee80211_local *local,
		     struct ieee80211_sub_if_data *sdata,
		     enum ieee80211_ampdu_mlme_action action,
		     struct ieee80211_sta *sta, u16 tid,
		     u16 *ssn, u8 buf_size, bool amsdu)
{
	int ret = -EOPNOTSUPP;

	might_sleep();

	sdata = get_bss_sdata(sdata);
	if (!check_sdata_in_driver(sdata))
		return -EIO;

	trace_drv_ampdu_action(local, sdata, action, sta, tid,
			       ssn, buf_size, amsdu);

	if (local->ops->ampdu_action)
		ret = local->ops->ampdu_action(&local->hw, &sdata->vif, action,
					       sta, tid, ssn, buf_size, amsdu);

	trace_drv_return_int(local, ret);

	return ret;
}
OpenPOWER on IntegriCloud