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1// SPDX-License-Identifier: BSD-3-Clause-Clear
2/*
3 * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
4 */
5
6#include "core.h"
7#include "peer.h"
8#include "debug.h"
9
10struct ath11k_peer *ath11k_peer_find(struct ath11k_base *ab, int vdev_id,
11 const u8 *addr)
12{
13 struct ath11k_peer *peer;
14
15 lockdep_assert_held(&ab->base_lock);
16
17 list_for_each_entry(peer, &ab->peers, list) {
18 if (peer->vdev_id != vdev_id)
19 continue;
20 if (!ether_addr_equal(peer->addr, addr))
21 continue;
22
23 return peer;
24 }
25
26 return NULL;
27}
28
29static struct ath11k_peer *ath11k_peer_find_by_pdev_idx(struct ath11k_base *ab,
30 u8 pdev_idx, const u8 *addr)
31{
32 struct ath11k_peer *peer;
33
34 lockdep_assert_held(&ab->base_lock);
35
36 list_for_each_entry(peer, &ab->peers, list) {
37 if (peer->pdev_idx != pdev_idx)
38 continue;
39 if (!ether_addr_equal(peer->addr, addr))
40 continue;
41
42 return peer;
43 }
44
45 return NULL;
46}
47
48struct ath11k_peer *ath11k_peer_find_by_addr(struct ath11k_base *ab,
49 const u8 *addr)
50{
51 struct ath11k_peer *peer;
52
53 lockdep_assert_held(&ab->base_lock);
54
55 list_for_each_entry(peer, &ab->peers, list) {
56 if (!ether_addr_equal(peer->addr, addr))
57 continue;
58
59 return peer;
60 }
61
62 return NULL;
63}
64
65struct ath11k_peer *ath11k_peer_find_by_id(struct ath11k_base *ab,
66 int peer_id)
67{
68 struct ath11k_peer *peer;
69
70 lockdep_assert_held(&ab->base_lock);
71
72 list_for_each_entry(peer, &ab->peers, list)
73 if (peer_id == peer->peer_id)
74 return peer;
75
76 return NULL;
77}
78
79struct ath11k_peer *ath11k_peer_find_by_vdev_id(struct ath11k_base *ab,
80 int vdev_id)
81{
82 struct ath11k_peer *peer;
83
84 spin_lock_bh(&ab->base_lock);
85
86 list_for_each_entry(peer, &ab->peers, list) {
87 if (vdev_id == peer->vdev_id) {
88 spin_unlock_bh(&ab->base_lock);
89 return peer;
90 }
91 }
92 spin_unlock_bh(&ab->base_lock);
93 return NULL;
94}
95
96void ath11k_peer_unmap_event(struct ath11k_base *ab, u16 peer_id)
97{
98 struct ath11k_peer *peer;
99
100 spin_lock_bh(&ab->base_lock);
101
102 peer = ath11k_peer_find_by_id(ab, peer_id);
103 if (!peer) {
104 ath11k_warn(ab, "peer-unmap-event: unknown peer id %d\n",
105 peer_id);
106 goto exit;
107 }
108
109 ath11k_dbg(ab, ATH11K_DBG_DP_HTT, "htt peer unmap vdev %d peer %pM id %d\n",
110 peer->vdev_id, peer->addr, peer_id);
111
112 list_del(&peer->list);
113 kfree(peer);
114 wake_up(&ab->peer_mapping_wq);
115
116exit:
117 spin_unlock_bh(&ab->base_lock);
118}
119
120void ath11k_peer_map_event(struct ath11k_base *ab, u8 vdev_id, u16 peer_id,
121 u8 *mac_addr, u16 ast_hash, u16 hw_peer_id)
122{
123 struct ath11k_peer *peer;
124
125 spin_lock_bh(&ab->base_lock);
126 peer = ath11k_peer_find(ab, vdev_id, mac_addr);
127 if (!peer) {
128 peer = kzalloc(sizeof(*peer), GFP_ATOMIC);
129 if (!peer)
130 goto exit;
131
132 peer->vdev_id = vdev_id;
133 peer->peer_id = peer_id;
134 peer->ast_hash = ast_hash;
135 peer->hw_peer_id = hw_peer_id;
136 ether_addr_copy(peer->addr, mac_addr);
137 list_add(&peer->list, &ab->peers);
138 wake_up(&ab->peer_mapping_wq);
139 }
140
141 ath11k_dbg(ab, ATH11K_DBG_DP_HTT, "htt peer map vdev %d peer %pM id %d\n",
142 vdev_id, mac_addr, peer_id);
143
144exit:
145 spin_unlock_bh(&ab->base_lock);
146}
147
148static int ath11k_wait_for_peer_common(struct ath11k_base *ab, int vdev_id,
149 const u8 *addr, bool expect_mapped)
150{
151 int ret;
152
153 ret = wait_event_timeout(ab->peer_mapping_wq, ({
154 bool mapped;
155
156 spin_lock_bh(&ab->base_lock);
157 mapped = !!ath11k_peer_find(ab, vdev_id, addr);
158 spin_unlock_bh(&ab->base_lock);
159
160 (mapped == expect_mapped ||
161 test_bit(ATH11K_FLAG_CRASH_FLUSH, &ab->dev_flags));
162 }), 3 * HZ);
163
164 if (ret <= 0)
165 return -ETIMEDOUT;
166
167 return 0;
168}
169
170void ath11k_peer_cleanup(struct ath11k *ar, u32 vdev_id)
171{
172 struct ath11k_peer *peer, *tmp;
173 struct ath11k_base *ab = ar->ab;
174
175 lockdep_assert_held(&ar->conf_mutex);
176
177 spin_lock_bh(&ab->base_lock);
178 list_for_each_entry_safe(peer, tmp, &ab->peers, list) {
179 if (peer->vdev_id != vdev_id)
180 continue;
181
182 ath11k_warn(ab, "removing stale peer %pM from vdev_id %d\n",
183 peer->addr, vdev_id);
184
185 list_del(&peer->list);
186 kfree(peer);
187 ar->num_peers--;
188 }
189
190 spin_unlock_bh(&ab->base_lock);
191}
192
193static int ath11k_wait_for_peer_deleted(struct ath11k *ar, int vdev_id, const u8 *addr)
194{
195 return ath11k_wait_for_peer_common(ar->ab, vdev_id, addr, false);
196}
197
198int ath11k_wait_for_peer_delete_done(struct ath11k *ar, u32 vdev_id,
199 const u8 *addr)
200{
201 int ret;
202 unsigned long time_left;
203
204 ret = ath11k_wait_for_peer_deleted(ar, vdev_id, addr);
205 if (ret) {
206 ath11k_warn(ar->ab, "failed wait for peer deleted");
207 return ret;
208 }
209
210 time_left = wait_for_completion_timeout(&ar->peer_delete_done,
211 3 * HZ);
212 if (time_left == 0) {
213 ath11k_warn(ar->ab, "Timeout in receiving peer delete response\n");
214 return -ETIMEDOUT;
215 }
216
217 return 0;
218}
219
220int ath11k_peer_delete(struct ath11k *ar, u32 vdev_id, u8 *addr)
221{
222 int ret;
223
224 lockdep_assert_held(&ar->conf_mutex);
225
226 reinit_completion(&ar->peer_delete_done);
227
228 ret = ath11k_wmi_send_peer_delete_cmd(ar, addr, vdev_id);
229 if (ret) {
230 ath11k_warn(ar->ab,
231 "failed to delete peer vdev_id %d addr %pM ret %d\n",
232 vdev_id, addr, ret);
233 return ret;
234 }
235
236 ret = ath11k_wait_for_peer_delete_done(ar, vdev_id, addr);
237 if (ret)
238 return ret;
239
240 ar->num_peers--;
241
242 return 0;
243}
244
245static int ath11k_wait_for_peer_created(struct ath11k *ar, int vdev_id, const u8 *addr)
246{
247 return ath11k_wait_for_peer_common(ar->ab, vdev_id, addr, true);
248}
249
250int ath11k_peer_create(struct ath11k *ar, struct ath11k_vif *arvif,
251 struct ieee80211_sta *sta, struct peer_create_params *param)
252{
253 struct ath11k_peer *peer;
254 int ret;
255
256 lockdep_assert_held(&ar->conf_mutex);
257
258 if (ar->num_peers > (ar->max_num_peers - 1)) {
259 ath11k_warn(ar->ab,
260 "failed to create peer due to insufficient peer entry resource in firmware\n");
261 return -ENOBUFS;
262 }
263
264 spin_lock_bh(&ar->ab->base_lock);
265 peer = ath11k_peer_find_by_pdev_idx(ar->ab, ar->pdev_idx, param->peer_addr);
266 if (peer) {
267 spin_unlock_bh(&ar->ab->base_lock);
268 return -EINVAL;
269 }
270 spin_unlock_bh(&ar->ab->base_lock);
271
272 ret = ath11k_wmi_send_peer_create_cmd(ar, param);
273 if (ret) {
274 ath11k_warn(ar->ab,
275 "failed to send peer create vdev_id %d ret %d\n",
276 param->vdev_id, ret);
277 return ret;
278 }
279
280 ret = ath11k_wait_for_peer_created(ar, param->vdev_id,
281 param->peer_addr);
282 if (ret)
283 return ret;
284
285 spin_lock_bh(&ar->ab->base_lock);
286
287 peer = ath11k_peer_find(ar->ab, param->vdev_id, param->peer_addr);
288 if (!peer) {
289 spin_unlock_bh(&ar->ab->base_lock);
290 ath11k_warn(ar->ab, "failed to find peer %pM on vdev %i after creation\n",
291 param->peer_addr, param->vdev_id);
292
293 reinit_completion(&ar->peer_delete_done);
294
295 ret = ath11k_wmi_send_peer_delete_cmd(ar, param->peer_addr,
296 param->vdev_id);
297 if (ret) {
298 ath11k_warn(ar->ab, "failed to delete peer vdev_id %d addr %pM\n",
299 param->vdev_id, param->peer_addr);
300 return ret;
301 }
302
303 ret = ath11k_wait_for_peer_delete_done(ar, param->vdev_id,
304 param->peer_addr);
305 if (ret)
306 return ret;
307
308 return -ENOENT;
309 }
310
311 peer->pdev_idx = ar->pdev_idx;
312 peer->sta = sta;
313
314 if (arvif->vif->type == NL80211_IFTYPE_STATION) {
315 arvif->ast_hash = peer->ast_hash;
316 arvif->ast_idx = peer->hw_peer_id;
317 }
318
319 peer->sec_type = HAL_ENCRYPT_TYPE_OPEN;
320 peer->sec_type_grp = HAL_ENCRYPT_TYPE_OPEN;
321
322 ar->num_peers++;
323
324 spin_unlock_bh(&ar->ab->base_lock);
325
326 return 0;
327}