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
13int 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
35void 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
55int 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
78int 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
95void 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
110int 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
141void 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
161int 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 (WARN_ONCE(params->cw_min == 0 ||
173		      params->cw_min > params->cw_max,
174		      "%s: invalid CW_min/CW_max: %d/%d\n",
175		      sdata->name, params->cw_min, params->cw_max))
176		return -EINVAL;
177
178	trace_drv_conf_tx(local, sdata, ac, params);
179	if (local->ops->conf_tx)
180		ret = local->ops->conf_tx(&local->hw, &sdata->vif,
181					  ac, params);
182	trace_drv_return_int(local, ret);
183	return ret;
184}
185
186u64 drv_get_tsf(struct ieee80211_local *local,
187		struct ieee80211_sub_if_data *sdata)
188{
189	u64 ret = -1ULL;
190
191	might_sleep();
192
193	if (!check_sdata_in_driver(sdata))
194		return ret;
195
196	trace_drv_get_tsf(local, sdata);
197	if (local->ops->get_tsf)
198		ret = local->ops->get_tsf(&local->hw, &sdata->vif);
199	trace_drv_return_u64(local, ret);
200	return ret;
201}
202
203void drv_set_tsf(struct ieee80211_local *local,
204		 struct ieee80211_sub_if_data *sdata,
205		 u64 tsf)
206{
207	might_sleep();
208
209	if (!check_sdata_in_driver(sdata))
210		return;
211
212	trace_drv_set_tsf(local, sdata, tsf);
213	if (local->ops->set_tsf)
214		local->ops->set_tsf(&local->hw, &sdata->vif, tsf);
215	trace_drv_return_void(local);
216}
217
218void drv_reset_tsf(struct ieee80211_local *local,
219		   struct ieee80211_sub_if_data *sdata)
220{
221	might_sleep();
222
223	if (!check_sdata_in_driver(sdata))
224		return;
225
226	trace_drv_reset_tsf(local, sdata);
227	if (local->ops->reset_tsf)
228		local->ops->reset_tsf(&local->hw, &sdata->vif);
229	trace_drv_return_void(local);
230}
231
232int drv_switch_vif_chanctx(struct ieee80211_local *local,
233			   struct ieee80211_vif_chanctx_switch *vifs,
234			   int n_vifs, enum ieee80211_chanctx_switch_mode mode)
235{
236	int ret = 0;
237	int i;
238
239	might_sleep();
240
241	if (!local->ops->switch_vif_chanctx)
242		return -EOPNOTSUPP;
243
244	for (i = 0; i < n_vifs; i++) {
245		struct ieee80211_chanctx *new_ctx =
246			container_of(vifs[i].new_ctx,
247				     struct ieee80211_chanctx,
248				     conf);
249		struct ieee80211_chanctx *old_ctx =
250			container_of(vifs[i].old_ctx,
251				     struct ieee80211_chanctx,
252				     conf);
253
254		WARN_ON_ONCE(!old_ctx->driver_present);
255		WARN_ON_ONCE((mode == CHANCTX_SWMODE_SWAP_CONTEXTS &&
256			      new_ctx->driver_present) ||
257			     (mode == CHANCTX_SWMODE_REASSIGN_VIF &&
258			      !new_ctx->driver_present));
259	}
260
261	trace_drv_switch_vif_chanctx(local, vifs, n_vifs, mode);
262	ret = local->ops->switch_vif_chanctx(&local->hw,
263					     vifs, n_vifs, mode);
264	trace_drv_return_int(local, ret);
265
266	if (!ret && mode == CHANCTX_SWMODE_SWAP_CONTEXTS) {
267		for (i = 0; i < n_vifs; i++) {
268			struct ieee80211_chanctx *new_ctx =
269				container_of(vifs[i].new_ctx,
270					     struct ieee80211_chanctx,
271					     conf);
272			struct ieee80211_chanctx *old_ctx =
273				container_of(vifs[i].old_ctx,
274					     struct ieee80211_chanctx,
275					     conf);
276
277			new_ctx->driver_present = true;
278			old_ctx->driver_present = false;
279		}
280	}
281
282	return ret;
283}
284
285int drv_ampdu_action(struct ieee80211_local *local,
286		     struct ieee80211_sub_if_data *sdata,
287		     enum ieee80211_ampdu_mlme_action action,
288		     struct ieee80211_sta *sta, u16 tid,
289		     u16 *ssn, u8 buf_size, bool amsdu)
290{
291	int ret = -EOPNOTSUPP;
292
293	might_sleep();
294
295	sdata = get_bss_sdata(sdata);
296	if (!check_sdata_in_driver(sdata))
297		return -EIO;
298
299	trace_drv_ampdu_action(local, sdata, action, sta, tid,
300			       ssn, buf_size, amsdu);
301
302	if (local->ops->ampdu_action)
303		ret = local->ops->ampdu_action(&local->hw, &sdata->vif, action,
304					       sta, tid, ssn, buf_size, amsdu);
305
306	trace_drv_return_int(local, ret);
307
308	return ret;
309}
310