1 /*
2 * Copyright (c) 2015-2017 Qualcomm Atheros, Inc.
3 * Copyright (c) 2018, The Linux Foundation. All rights reserved.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include "mac.h"
19
20 #include <net/mac80211.h>
21 #include "hif.h"
22 #include "core.h"
23 #include "debug.h"
24 #include "wmi.h"
25 #include "wmi-ops.h"
26
27 static const struct wiphy_wowlan_support ath10k_wowlan_support = {
28 .flags = WIPHY_WOWLAN_DISCONNECT |
29 WIPHY_WOWLAN_MAGIC_PKT,
30 .pattern_min_len = WOW_MIN_PATTERN_SIZE,
31 .pattern_max_len = WOW_MAX_PATTERN_SIZE,
32 .max_pkt_offset = WOW_MAX_PKT_OFFSET,
33 };
34
ath10k_wow_vif_cleanup(struct ath10k_vif * arvif)35 static int ath10k_wow_vif_cleanup(struct ath10k_vif *arvif)
36 {
37 struct ath10k *ar = arvif->ar;
38 int i, ret;
39
40 for (i = 0; i < WOW_EVENT_MAX; i++) {
41 ret = ath10k_wmi_wow_add_wakeup_event(ar, arvif->vdev_id, i, 0);
42 if (ret) {
43 ath10k_warn(ar, "failed to issue wow wakeup for event %s on vdev %i: %d\n",
44 wow_wakeup_event(i), arvif->vdev_id, ret);
45 return ret;
46 }
47 }
48
49 for (i = 0; i < ar->wow.max_num_patterns; i++) {
50 ret = ath10k_wmi_wow_del_pattern(ar, arvif->vdev_id, i);
51 if (ret) {
52 ath10k_warn(ar, "failed to delete wow pattern %d for vdev %i: %d\n",
53 i, arvif->vdev_id, ret);
54 return ret;
55 }
56 }
57
58 return 0;
59 }
60
ath10k_wow_cleanup(struct ath10k * ar)61 static int ath10k_wow_cleanup(struct ath10k *ar)
62 {
63 struct ath10k_vif *arvif;
64 int ret;
65
66 lockdep_assert_held(&ar->conf_mutex);
67
68 list_for_each_entry(arvif, &ar->arvifs, list) {
69 ret = ath10k_wow_vif_cleanup(arvif);
70 if (ret) {
71 ath10k_warn(ar, "failed to clean wow wakeups on vdev %i: %d\n",
72 arvif->vdev_id, ret);
73 return ret;
74 }
75 }
76
77 return 0;
78 }
79
80 /**
81 * Convert a 802.3 format to a 802.11 format.
82 * +------------+-----------+--------+----------------+
83 * 802.3: |dest mac(6B)|src mac(6B)|type(2B)| body... |
84 * +------------+-----------+--------+----------------+
85 * |__ |_______ |____________ |________
86 * | | | |
87 * +--+------------+----+-----------+---------------+-----------+
88 * 802.11: |4B|dest mac(6B)| 6B |src mac(6B)| 8B |type(2B)| body... |
89 * +--+------------+----+-----------+---------------+-----------+
90 */
ath10k_wow_convert_8023_to_80211(struct cfg80211_pkt_pattern * new,const struct cfg80211_pkt_pattern * old)91 static void ath10k_wow_convert_8023_to_80211
92 (struct cfg80211_pkt_pattern *new,
93 const struct cfg80211_pkt_pattern *old)
94 {
95 u8 hdr_8023_pattern[ETH_HLEN] = {};
96 u8 hdr_8023_bit_mask[ETH_HLEN] = {};
97 u8 hdr_80211_pattern[WOW_HDR_LEN] = {};
98 u8 hdr_80211_bit_mask[WOW_HDR_LEN] = {};
99
100 int total_len = old->pkt_offset + old->pattern_len;
101 int hdr_80211_end_offset;
102
103 struct ieee80211_hdr_3addr *new_hdr_pattern =
104 (struct ieee80211_hdr_3addr *)hdr_80211_pattern;
105 struct ieee80211_hdr_3addr *new_hdr_mask =
106 (struct ieee80211_hdr_3addr *)hdr_80211_bit_mask;
107 struct ethhdr *old_hdr_pattern = (struct ethhdr *)hdr_8023_pattern;
108 struct ethhdr *old_hdr_mask = (struct ethhdr *)hdr_8023_bit_mask;
109 int hdr_len = sizeof(*new_hdr_pattern);
110
111 struct rfc1042_hdr *new_rfc_pattern =
112 (struct rfc1042_hdr *)(hdr_80211_pattern + hdr_len);
113 struct rfc1042_hdr *new_rfc_mask =
114 (struct rfc1042_hdr *)(hdr_80211_bit_mask + hdr_len);
115 int rfc_len = sizeof(*new_rfc_pattern);
116
117 memcpy(hdr_8023_pattern + old->pkt_offset,
118 old->pattern, ETH_HLEN - old->pkt_offset);
119 memcpy(hdr_8023_bit_mask + old->pkt_offset,
120 old->mask, ETH_HLEN - old->pkt_offset);
121
122 /* Copy destination address */
123 memcpy(new_hdr_pattern->addr1, old_hdr_pattern->h_dest, ETH_ALEN);
124 memcpy(new_hdr_mask->addr1, old_hdr_mask->h_dest, ETH_ALEN);
125
126 /* Copy source address */
127 memcpy(new_hdr_pattern->addr3, old_hdr_pattern->h_source, ETH_ALEN);
128 memcpy(new_hdr_mask->addr3, old_hdr_mask->h_source, ETH_ALEN);
129
130 /* Copy logic link type */
131 memcpy(&new_rfc_pattern->snap_type,
132 &old_hdr_pattern->h_proto,
133 sizeof(old_hdr_pattern->h_proto));
134 memcpy(&new_rfc_mask->snap_type,
135 &old_hdr_mask->h_proto,
136 sizeof(old_hdr_mask->h_proto));
137
138 /* Caculate new pkt_offset */
139 if (old->pkt_offset < ETH_ALEN)
140 new->pkt_offset = old->pkt_offset +
141 offsetof(struct ieee80211_hdr_3addr, addr1);
142 else if (old->pkt_offset < offsetof(struct ethhdr, h_proto))
143 new->pkt_offset = old->pkt_offset +
144 offsetof(struct ieee80211_hdr_3addr, addr3) -
145 offsetof(struct ethhdr, h_source);
146 else
147 new->pkt_offset = old->pkt_offset + hdr_len + rfc_len - ETH_HLEN;
148
149 /* Caculate new hdr end offset */
150 if (total_len > ETH_HLEN)
151 hdr_80211_end_offset = hdr_len + rfc_len;
152 else if (total_len > offsetof(struct ethhdr, h_proto))
153 hdr_80211_end_offset = hdr_len + rfc_len + total_len - ETH_HLEN;
154 else if (total_len > ETH_ALEN)
155 hdr_80211_end_offset = total_len - ETH_ALEN +
156 offsetof(struct ieee80211_hdr_3addr, addr3);
157 else
158 hdr_80211_end_offset = total_len +
159 offsetof(struct ieee80211_hdr_3addr, addr1);
160
161 new->pattern_len = hdr_80211_end_offset - new->pkt_offset;
162
163 memcpy((u8 *)new->pattern,
164 hdr_80211_pattern + new->pkt_offset,
165 new->pattern_len);
166 memcpy((u8 *)new->mask,
167 hdr_80211_bit_mask + new->pkt_offset,
168 new->pattern_len);
169
170 if (total_len > ETH_HLEN) {
171 /* Copy frame body */
172 memcpy((u8 *)new->pattern + new->pattern_len,
173 (void *)old->pattern + ETH_HLEN - old->pkt_offset,
174 total_len - ETH_HLEN);
175 memcpy((u8 *)new->mask + new->pattern_len,
176 (void *)old->mask + ETH_HLEN - old->pkt_offset,
177 total_len - ETH_HLEN);
178
179 new->pattern_len += total_len - ETH_HLEN;
180 }
181 }
182
ath10k_vif_wow_set_wakeups(struct ath10k_vif * arvif,struct cfg80211_wowlan * wowlan)183 static int ath10k_vif_wow_set_wakeups(struct ath10k_vif *arvif,
184 struct cfg80211_wowlan *wowlan)
185 {
186 int ret, i;
187 unsigned long wow_mask = 0;
188 struct ath10k *ar = arvif->ar;
189 const struct cfg80211_pkt_pattern *patterns = wowlan->patterns;
190 int pattern_id = 0;
191
192 /* Setup requested WOW features */
193 switch (arvif->vdev_type) {
194 case WMI_VDEV_TYPE_IBSS:
195 __set_bit(WOW_BEACON_EVENT, &wow_mask);
196 /* fall through */
197 case WMI_VDEV_TYPE_AP:
198 __set_bit(WOW_DEAUTH_RECVD_EVENT, &wow_mask);
199 __set_bit(WOW_DISASSOC_RECVD_EVENT, &wow_mask);
200 __set_bit(WOW_PROBE_REQ_WPS_IE_EVENT, &wow_mask);
201 __set_bit(WOW_AUTH_REQ_EVENT, &wow_mask);
202 __set_bit(WOW_ASSOC_REQ_EVENT, &wow_mask);
203 __set_bit(WOW_HTT_EVENT, &wow_mask);
204 __set_bit(WOW_RA_MATCH_EVENT, &wow_mask);
205 break;
206 case WMI_VDEV_TYPE_STA:
207 if (wowlan->disconnect) {
208 __set_bit(WOW_DEAUTH_RECVD_EVENT, &wow_mask);
209 __set_bit(WOW_DISASSOC_RECVD_EVENT, &wow_mask);
210 __set_bit(WOW_BMISS_EVENT, &wow_mask);
211 __set_bit(WOW_CSA_IE_EVENT, &wow_mask);
212 }
213
214 if (wowlan->magic_pkt)
215 __set_bit(WOW_MAGIC_PKT_RECVD_EVENT, &wow_mask);
216 break;
217 default:
218 break;
219 }
220
221 for (i = 0; i < wowlan->n_patterns; i++) {
222 u8 bitmask[WOW_MAX_PATTERN_SIZE] = {};
223 u8 ath_pattern[WOW_MAX_PATTERN_SIZE] = {};
224 u8 ath_bitmask[WOW_MAX_PATTERN_SIZE] = {};
225 struct cfg80211_pkt_pattern new_pattern = {};
226 struct cfg80211_pkt_pattern old_pattern = patterns[i];
227 int j;
228
229 new_pattern.pattern = ath_pattern;
230 new_pattern.mask = ath_bitmask;
231 if (patterns[i].pattern_len > WOW_MAX_PATTERN_SIZE)
232 continue;
233 /* convert bytemask to bitmask */
234 for (j = 0; j < patterns[i].pattern_len; j++)
235 if (patterns[i].mask[j / 8] & BIT(j % 8))
236 bitmask[j] = 0xff;
237 old_pattern.mask = bitmask;
238 new_pattern = old_pattern;
239
240 if (ar->wmi.rx_decap_mode == ATH10K_HW_TXRX_NATIVE_WIFI) {
241 if (patterns[i].pkt_offset < ETH_HLEN)
242 ath10k_wow_convert_8023_to_80211(&new_pattern,
243 &old_pattern);
244 else
245 new_pattern.pkt_offset += WOW_HDR_LEN - ETH_HLEN;
246 }
247
248 if (WARN_ON(new_pattern.pattern_len > WOW_MAX_PATTERN_SIZE))
249 return -EINVAL;
250
251 ret = ath10k_wmi_wow_add_pattern(ar, arvif->vdev_id,
252 pattern_id,
253 new_pattern.pattern,
254 new_pattern.mask,
255 new_pattern.pattern_len,
256 new_pattern.pkt_offset);
257 if (ret) {
258 ath10k_warn(ar, "failed to add pattern %i to vdev %i: %d\n",
259 pattern_id,
260 arvif->vdev_id, ret);
261 return ret;
262 }
263
264 pattern_id++;
265 __set_bit(WOW_PATTERN_MATCH_EVENT, &wow_mask);
266 }
267
268 for (i = 0; i < WOW_EVENT_MAX; i++) {
269 if (!test_bit(i, &wow_mask))
270 continue;
271 ret = ath10k_wmi_wow_add_wakeup_event(ar, arvif->vdev_id, i, 1);
272 if (ret) {
273 ath10k_warn(ar, "failed to enable wakeup event %s on vdev %i: %d\n",
274 wow_wakeup_event(i), arvif->vdev_id, ret);
275 return ret;
276 }
277 }
278
279 return 0;
280 }
281
ath10k_wow_set_wakeups(struct ath10k * ar,struct cfg80211_wowlan * wowlan)282 static int ath10k_wow_set_wakeups(struct ath10k *ar,
283 struct cfg80211_wowlan *wowlan)
284 {
285 struct ath10k_vif *arvif;
286 int ret;
287
288 lockdep_assert_held(&ar->conf_mutex);
289
290 list_for_each_entry(arvif, &ar->arvifs, list) {
291 ret = ath10k_vif_wow_set_wakeups(arvif, wowlan);
292 if (ret) {
293 ath10k_warn(ar, "failed to set wow wakeups on vdev %i: %d\n",
294 arvif->vdev_id, ret);
295 return ret;
296 }
297 }
298
299 return 0;
300 }
301
ath10k_wow_enable(struct ath10k * ar)302 static int ath10k_wow_enable(struct ath10k *ar)
303 {
304 int ret;
305
306 lockdep_assert_held(&ar->conf_mutex);
307
308 reinit_completion(&ar->target_suspend);
309
310 ret = ath10k_wmi_wow_enable(ar);
311 if (ret) {
312 ath10k_warn(ar, "failed to issue wow enable: %d\n", ret);
313 return ret;
314 }
315
316 ret = wait_for_completion_timeout(&ar->target_suspend, 3 * HZ);
317 if (ret == 0) {
318 ath10k_warn(ar, "timed out while waiting for suspend completion\n");
319 return -ETIMEDOUT;
320 }
321
322 return 0;
323 }
324
ath10k_wow_wakeup(struct ath10k * ar)325 static int ath10k_wow_wakeup(struct ath10k *ar)
326 {
327 int ret;
328
329 lockdep_assert_held(&ar->conf_mutex);
330
331 reinit_completion(&ar->wow.wakeup_completed);
332
333 ret = ath10k_wmi_wow_host_wakeup_ind(ar);
334 if (ret) {
335 ath10k_warn(ar, "failed to send wow wakeup indication: %d\n",
336 ret);
337 return ret;
338 }
339
340 ret = wait_for_completion_timeout(&ar->wow.wakeup_completed, 3 * HZ);
341 if (ret == 0) {
342 ath10k_warn(ar, "timed out while waiting for wow wakeup completion\n");
343 return -ETIMEDOUT;
344 }
345
346 return 0;
347 }
348
ath10k_wow_op_suspend(struct ieee80211_hw * hw,struct cfg80211_wowlan * wowlan)349 int ath10k_wow_op_suspend(struct ieee80211_hw *hw,
350 struct cfg80211_wowlan *wowlan)
351 {
352 struct ath10k *ar = hw->priv;
353 int ret;
354
355 mutex_lock(&ar->conf_mutex);
356
357 if (WARN_ON(!test_bit(ATH10K_FW_FEATURE_WOWLAN_SUPPORT,
358 ar->running_fw->fw_file.fw_features))) {
359 ret = 1;
360 goto exit;
361 }
362
363 ret = ath10k_wow_cleanup(ar);
364 if (ret) {
365 ath10k_warn(ar, "failed to clear wow wakeup events: %d\n",
366 ret);
367 goto exit;
368 }
369
370 ret = ath10k_wow_set_wakeups(ar, wowlan);
371 if (ret) {
372 ath10k_warn(ar, "failed to set wow wakeup events: %d\n",
373 ret);
374 goto cleanup;
375 }
376
377 ret = ath10k_wow_enable(ar);
378 if (ret) {
379 ath10k_warn(ar, "failed to start wow: %d\n", ret);
380 goto cleanup;
381 }
382
383 ret = ath10k_hif_suspend(ar);
384 if (ret) {
385 ath10k_warn(ar, "failed to suspend hif: %d\n", ret);
386 goto wakeup;
387 }
388
389 goto exit;
390
391 wakeup:
392 ath10k_wow_wakeup(ar);
393
394 cleanup:
395 ath10k_wow_cleanup(ar);
396
397 exit:
398 mutex_unlock(&ar->conf_mutex);
399 return ret ? 1 : 0;
400 }
401
ath10k_wow_op_set_wakeup(struct ieee80211_hw * hw,bool enabled)402 void ath10k_wow_op_set_wakeup(struct ieee80211_hw *hw, bool enabled)
403 {
404 struct ath10k *ar = hw->priv;
405
406 mutex_lock(&ar->conf_mutex);
407 if (test_bit(ATH10K_FW_FEATURE_WOWLAN_SUPPORT,
408 ar->running_fw->fw_file.fw_features)) {
409 device_set_wakeup_enable(ar->dev, enabled);
410 }
411 mutex_unlock(&ar->conf_mutex);
412 }
413
ath10k_wow_op_resume(struct ieee80211_hw * hw)414 int ath10k_wow_op_resume(struct ieee80211_hw *hw)
415 {
416 struct ath10k *ar = hw->priv;
417 int ret;
418
419 mutex_lock(&ar->conf_mutex);
420
421 if (WARN_ON(!test_bit(ATH10K_FW_FEATURE_WOWLAN_SUPPORT,
422 ar->running_fw->fw_file.fw_features))) {
423 ret = 1;
424 goto exit;
425 }
426
427 ret = ath10k_hif_resume(ar);
428 if (ret) {
429 ath10k_warn(ar, "failed to resume hif: %d\n", ret);
430 goto exit;
431 }
432
433 ret = ath10k_wow_wakeup(ar);
434 if (ret)
435 ath10k_warn(ar, "failed to wakeup from wow: %d\n", ret);
436
437 exit:
438 if (ret) {
439 switch (ar->state) {
440 case ATH10K_STATE_ON:
441 ar->state = ATH10K_STATE_RESTARTING;
442 ret = 1;
443 break;
444 case ATH10K_STATE_OFF:
445 case ATH10K_STATE_RESTARTING:
446 case ATH10K_STATE_RESTARTED:
447 case ATH10K_STATE_UTF:
448 case ATH10K_STATE_WEDGED:
449 ath10k_warn(ar, "encountered unexpected device state %d on resume, cannot recover\n",
450 ar->state);
451 ret = -EIO;
452 break;
453 }
454 }
455
456 mutex_unlock(&ar->conf_mutex);
457 return ret;
458 }
459
ath10k_wow_init(struct ath10k * ar)460 int ath10k_wow_init(struct ath10k *ar)
461 {
462 if (!test_bit(ATH10K_FW_FEATURE_WOWLAN_SUPPORT,
463 ar->running_fw->fw_file.fw_features))
464 return 0;
465
466 if (WARN_ON(!test_bit(WMI_SERVICE_WOW, ar->wmi.svc_map)))
467 return -EINVAL;
468
469 ar->wow.wowlan_support = ath10k_wowlan_support;
470
471 if (ar->wmi.rx_decap_mode == ATH10K_HW_TXRX_NATIVE_WIFI) {
472 ar->wow.wowlan_support.pattern_max_len -= WOW_MAX_REDUCE;
473 ar->wow.wowlan_support.max_pkt_offset -= WOW_MAX_REDUCE;
474 }
475
476 ar->wow.wowlan_support.n_patterns = ar->wow.max_num_patterns;
477 ar->hw->wiphy->wowlan = &ar->wow.wowlan_support;
478
479 device_set_wakeup_capable(ar->dev, true);
480
481 return 0;
482 }
483
