summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ath/ath11k/peer.c
blob: b69e7ebfa930327fdf8b10260c312d5888cf43bc (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
310
311
312
313
314
315
316
317
318
319
320
321
322
// SPDX-License-Identifier: BSD-3-Clause-Clear
/*
 * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
 */

#include "core.h"
#include "peer.h"
#include "debug.h"

struct ath11k_peer *ath11k_peer_find(struct ath11k_base *ab, int vdev_id,
				     const u8 *addr)
{
	struct ath11k_peer *peer;

	lockdep_assert_held(&ab->base_lock);

	list_for_each_entry(peer, &ab->peers, list) {
		if (peer->vdev_id != vdev_id)
			continue;
		if (!ether_addr_equal(peer->addr, addr))
			continue;

		return peer;
	}

	return NULL;
}

static struct ath11k_peer *ath11k_peer_find_by_pdev_idx(struct ath11k_base *ab,
							u8 pdev_idx, const u8 *addr)
{
	struct ath11k_peer *peer;

	lockdep_assert_held(&ab->base_lock);

	list_for_each_entry(peer, &ab->peers, list) {
		if (peer->pdev_idx != pdev_idx)
			continue;
		if (!ether_addr_equal(peer->addr, addr))
			continue;

		return peer;
	}

	return NULL;
}

struct ath11k_peer *ath11k_peer_find_by_addr(struct ath11k_base *ab,
					     const u8 *addr)
{
	struct ath11k_peer *peer;

	lockdep_assert_held(&ab->base_lock);

	list_for_each_entry(peer, &ab->peers, list) {
		if (!ether_addr_equal(peer->addr, addr))
			continue;

		return peer;
	}

	return NULL;
}

struct ath11k_peer *ath11k_peer_find_by_id(struct ath11k_base *ab,
					   int peer_id)
{
	struct ath11k_peer *peer;

	lockdep_assert_held(&ab->base_lock);

	list_for_each_entry(peer, &ab->peers, list)
		if (peer_id == peer->peer_id)
			return peer;

	return NULL;
}

struct ath11k_peer *ath11k_peer_find_by_vdev_id(struct ath11k_base *ab,
						int vdev_id)
{
	struct ath11k_peer *peer;

	spin_lock_bh(&ab->base_lock);

	list_for_each_entry(peer, &ab->peers, list) {
		if (vdev_id == peer->vdev_id) {
			spin_unlock_bh(&ab->base_lock);
			return peer;
		}
	}
	spin_unlock_bh(&ab->base_lock);
	return NULL;
}

void ath11k_peer_unmap_event(struct ath11k_base *ab, u16 peer_id)
{
	struct ath11k_peer *peer;

	spin_lock_bh(&ab->base_lock);

	peer = ath11k_peer_find_by_id(ab, peer_id);
	if (!peer) {
		ath11k_warn(ab, "peer-unmap-event: unknown peer id %d\n",
			    peer_id);
		goto exit;
	}

	ath11k_dbg(ab, ATH11K_DBG_DP_HTT, "htt peer unmap vdev %d peer %pM id %d\n",
		   peer->vdev_id, peer->addr, peer_id);

	list_del(&peer->list);
	kfree(peer);
	wake_up(&ab->peer_mapping_wq);

exit:
	spin_unlock_bh(&ab->base_lock);
}

void ath11k_peer_map_event(struct ath11k_base *ab, u8 vdev_id, u16 peer_id,
			   u8 *mac_addr, u16 ast_hash)
{
	struct ath11k_peer *peer;

	spin_lock_bh(&ab->base_lock);
	peer = ath11k_peer_find(ab, vdev_id, mac_addr);
	if (!peer) {
		peer = kzalloc(sizeof(*peer), GFP_ATOMIC);
		if (!peer)
			goto exit;

		peer->vdev_id = vdev_id;
		peer->peer_id = peer_id;
		peer->ast_hash = ast_hash;
		ether_addr_copy(peer->addr, mac_addr);
		list_add(&peer->list, &ab->peers);
		wake_up(&ab->peer_mapping_wq);
	}

	ath11k_dbg(ab, ATH11K_DBG_DP_HTT, "htt peer map vdev %d peer %pM id %d\n",
		   vdev_id, mac_addr, peer_id);

exit:
	spin_unlock_bh(&ab->base_lock);
}

static int ath11k_wait_for_peer_common(struct ath11k_base *ab, int vdev_id,
				       const u8 *addr, bool expect_mapped)
{
	int ret;

	ret = wait_event_timeout(ab->peer_mapping_wq, ({
				bool mapped;

				spin_lock_bh(&ab->base_lock);
				mapped = !!ath11k_peer_find(ab, vdev_id, addr);
				spin_unlock_bh(&ab->base_lock);

				(mapped == expect_mapped ||
				 test_bit(ATH11K_FLAG_CRASH_FLUSH, &ab->dev_flags));
				}), 3 * HZ);

	if (ret <= 0)
		return -ETIMEDOUT;

	return 0;
}

void ath11k_peer_cleanup(struct ath11k *ar, u32 vdev_id)
{
	struct ath11k_peer *peer, *tmp;
	struct ath11k_base *ab = ar->ab;

	lockdep_assert_held(&ar->conf_mutex);

	spin_lock_bh(&ab->base_lock);
	list_for_each_entry_safe(peer, tmp, &ab->peers, list) {
		if (peer->vdev_id != vdev_id)
			continue;

		ath11k_warn(ab, "removing stale peer %pM from vdev_id %d\n",
			    peer->addr, vdev_id);

		list_del(&peer->list);
		kfree(peer);
		ar->num_peers--;
	}

	spin_unlock_bh(&ab->base_lock);
}

static int ath11k_wait_for_peer_deleted(struct ath11k *ar, int vdev_id, const u8 *addr)
{
	return ath11k_wait_for_peer_common(ar->ab, vdev_id, addr, false);
}

int ath11k_wait_for_peer_delete_done(struct ath11k *ar, u32 vdev_id,
				     const u8 *addr)
{
	int ret;
	unsigned long time_left;

	ret = ath11k_wait_for_peer_deleted(ar, vdev_id, addr);
	if (ret) {
		ath11k_warn(ar->ab, "failed wait for peer deleted");
		return ret;
	}

	time_left = wait_for_completion_timeout(&ar->peer_delete_done,
						3 * HZ);
	if (time_left == 0) {
		ath11k_warn(ar->ab, "Timeout in receiving peer delete response\n");
		return -ETIMEDOUT;
	}

	return 0;
}

int ath11k_peer_delete(struct ath11k *ar, u32 vdev_id, u8 *addr)
{
	int ret;

	lockdep_assert_held(&ar->conf_mutex);

	reinit_completion(&ar->peer_delete_done);

	ret = ath11k_wmi_send_peer_delete_cmd(ar, addr, vdev_id);
	if (ret) {
		ath11k_warn(ar->ab,
			    "failed to delete peer vdev_id %d addr %pM ret %d\n",
			    vdev_id, addr, ret);
		return ret;
	}

	ret = ath11k_wait_for_peer_delete_done(ar, vdev_id, addr);
	if (ret)
		return ret;

	ar->num_peers--;

	return 0;
}

static int ath11k_wait_for_peer_created(struct ath11k *ar, int vdev_id, const u8 *addr)
{
	return ath11k_wait_for_peer_common(ar->ab, vdev_id, addr, true);
}

int ath11k_peer_create(struct ath11k *ar, struct ath11k_vif *arvif,
		       struct ieee80211_sta *sta, struct peer_create_params *param)
{
	struct ath11k_peer *peer;
	int ret;

	lockdep_assert_held(&ar->conf_mutex);

	if (ar->num_peers > (ar->max_num_peers - 1)) {
		ath11k_warn(ar->ab,
			    "failed to create peer due to insufficient peer entry resource in firmware\n");
		return -ENOBUFS;
	}

	spin_lock_bh(&ar->ab->base_lock);
	peer = ath11k_peer_find_by_pdev_idx(ar->ab, ar->pdev_idx, param->peer_addr);
	if (peer) {
		spin_unlock_bh(&ar->ab->base_lock);
		return -EINVAL;
	}
	spin_unlock_bh(&ar->ab->base_lock);

	ret = ath11k_wmi_send_peer_create_cmd(ar, param);
	if (ret) {
		ath11k_warn(ar->ab,
			    "failed to send peer create vdev_id %d ret %d\n",
			    param->vdev_id, ret);
		return ret;
	}

	ret = ath11k_wait_for_peer_created(ar, param->vdev_id,
					   param->peer_addr);
	if (ret)
		return ret;

	spin_lock_bh(&ar->ab->base_lock);

	peer = ath11k_peer_find(ar->ab, param->vdev_id, param->peer_addr);
	if (!peer) {
		spin_unlock_bh(&ar->ab->base_lock);
		ath11k_warn(ar->ab, "failed to find peer %pM on vdev %i after creation\n",
			    param->peer_addr, param->vdev_id);

		reinit_completion(&ar->peer_delete_done);

		ret = ath11k_wmi_send_peer_delete_cmd(ar, param->peer_addr,
						      param->vdev_id);
		if (ret) {
			ath11k_warn(ar->ab, "failed to delete peer vdev_id %d addr %pM\n",
				    param->vdev_id, param->peer_addr);
			return ret;
		}

		ret = ath11k_wait_for_peer_delete_done(ar, param->vdev_id,
						       param->peer_addr);
		if (ret)
			return ret;

		return -ENOENT;
	}

	peer->pdev_idx = ar->pdev_idx;
	peer->sta = sta;
	arvif->ast_hash = peer->ast_hash;

	peer->sec_type = HAL_ENCRYPT_TYPE_OPEN;
	peer->sec_type_grp = HAL_ENCRYPT_TYPE_OPEN;

	ar->num_peers++;

	spin_unlock_bh(&ar->ab->base_lock);

	return 0;
}