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iwlwifi: a few fixes in license
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / mvm / d3.c
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
22 * USA
23 *
24 * The full GNU General Public License is included in this distribution
25 * in the file called COPYING.
26 *
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
30 *
31 * BSD LICENSE
32 *
33 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
34 * All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 *
40 * * Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * * Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
45 * distribution.
46 * * Neither the name Intel Corporation nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
61 *
62 *****************************************************************************/
63
64 #include <linux/etherdevice.h>
65 #include <net/cfg80211.h>
66 #include <net/ipv6.h>
67 #include "iwl-modparams.h"
68 #include "fw-api.h"
69 #include "mvm.h"
70
71 void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw,
72 struct ieee80211_vif *vif,
73 struct cfg80211_gtk_rekey_data *data)
74 {
75 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
76 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
77
78 if (iwlwifi_mod_params.sw_crypto)
79 return;
80
81 mutex_lock(&mvm->mutex);
82
83 memcpy(mvmvif->rekey_data.kek, data->kek, NL80211_KEK_LEN);
84 memcpy(mvmvif->rekey_data.kck, data->kck, NL80211_KCK_LEN);
85 mvmvif->rekey_data.replay_ctr =
86 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
87 mvmvif->rekey_data.valid = true;
88
89 mutex_unlock(&mvm->mutex);
90 }
91
92 #if IS_ENABLED(CONFIG_IPV6)
93 void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
94 struct ieee80211_vif *vif,
95 struct inet6_dev *idev)
96 {
97 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
98 struct inet6_ifaddr *ifa;
99 int idx = 0;
100
101 read_lock_bh(&idev->lock);
102 list_for_each_entry(ifa, &idev->addr_list, if_list) {
103 mvmvif->target_ipv6_addrs[idx] = ifa->addr;
104 idx++;
105 if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS)
106 break;
107 }
108 read_unlock_bh(&idev->lock);
109
110 mvmvif->num_target_ipv6_addrs = idx;
111 }
112 #endif
113
114 void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
115 struct ieee80211_vif *vif, int idx)
116 {
117 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
118
119 mvmvif->tx_key_idx = idx;
120 }
121
122 static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out)
123 {
124 int i;
125
126 for (i = 0; i < IWL_P1K_SIZE; i++)
127 out[i] = cpu_to_le16(p1k[i]);
128 }
129
130 struct wowlan_key_data {
131 struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc;
132 struct iwl_wowlan_tkip_params_cmd *tkip;
133 bool error, use_rsc_tsc, use_tkip;
134 int gtk_key_idx;
135 };
136
137 static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
138 struct ieee80211_vif *vif,
139 struct ieee80211_sta *sta,
140 struct ieee80211_key_conf *key,
141 void *_data)
142 {
143 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
144 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
145 struct wowlan_key_data *data = _data;
146 struct aes_sc *aes_sc, *aes_tx_sc = NULL;
147 struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
148 struct iwl_p1k_cache *rx_p1ks;
149 u8 *rx_mic_key;
150 struct ieee80211_key_seq seq;
151 u32 cur_rx_iv32 = 0;
152 u16 p1k[IWL_P1K_SIZE];
153 int ret, i;
154
155 mutex_lock(&mvm->mutex);
156
157 switch (key->cipher) {
158 case WLAN_CIPHER_SUITE_WEP40:
159 case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */
160 struct {
161 struct iwl_mvm_wep_key_cmd wep_key_cmd;
162 struct iwl_mvm_wep_key wep_key;
163 } __packed wkc = {
164 .wep_key_cmd.mac_id_n_color =
165 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
166 mvmvif->color)),
167 .wep_key_cmd.num_keys = 1,
168 /* firmware sets STA_KEY_FLG_WEP_13BYTES */
169 .wep_key_cmd.decryption_type = STA_KEY_FLG_WEP,
170 .wep_key.key_index = key->keyidx,
171 .wep_key.key_size = key->keylen,
172 };
173
174 /*
175 * This will fail -- the key functions don't set support
176 * pairwise WEP keys. However, that's better than silently
177 * failing WoWLAN. Or maybe not?
178 */
179 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
180 break;
181
182 memcpy(&wkc.wep_key.key[3], key->key, key->keylen);
183 if (key->keyidx == mvmvif->tx_key_idx) {
184 /* TX key must be at offset 0 */
185 wkc.wep_key.key_offset = 0;
186 } else {
187 /* others start at 1 */
188 data->gtk_key_idx++;
189 wkc.wep_key.key_offset = data->gtk_key_idx;
190 }
191
192 ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, CMD_SYNC,
193 sizeof(wkc), &wkc);
194 data->error = ret != 0;
195
196 mvm->ptk_ivlen = key->iv_len;
197 mvm->ptk_icvlen = key->icv_len;
198 mvm->gtk_ivlen = key->iv_len;
199 mvm->gtk_icvlen = key->icv_len;
200
201 /* don't upload key again */
202 goto out_unlock;
203 }
204 default:
205 data->error = true;
206 goto out_unlock;
207 case WLAN_CIPHER_SUITE_AES_CMAC:
208 /*
209 * Ignore CMAC keys -- the WoWLAN firmware doesn't support them
210 * but we also shouldn't abort suspend due to that. It does have
211 * support for the IGTK key renewal, but doesn't really use the
212 * IGTK for anything. This means we could spuriously wake up or
213 * be deauthenticated, but that was considered acceptable.
214 */
215 goto out_unlock;
216 case WLAN_CIPHER_SUITE_TKIP:
217 if (sta) {
218 tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
219 tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
220
221 rx_p1ks = data->tkip->rx_uni;
222
223 ieee80211_get_key_tx_seq(key, &seq);
224 tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
225 tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
226
227 ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
228 iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k);
229
230 memcpy(data->tkip->mic_keys.tx,
231 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
232 IWL_MIC_KEY_SIZE);
233
234 rx_mic_key = data->tkip->mic_keys.rx_unicast;
235 } else {
236 tkip_sc =
237 data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
238 rx_p1ks = data->tkip->rx_multi;
239 rx_mic_key = data->tkip->mic_keys.rx_mcast;
240 }
241
242 /*
243 * For non-QoS this relies on the fact that both the uCode and
244 * mac80211 use TID 0 (as they need to to avoid replay attacks)
245 * for checking the IV in the frames.
246 */
247 for (i = 0; i < IWL_NUM_RSC; i++) {
248 ieee80211_get_key_rx_seq(key, i, &seq);
249 tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
250 tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
251 /* wrapping isn't allowed, AP must rekey */
252 if (seq.tkip.iv32 > cur_rx_iv32)
253 cur_rx_iv32 = seq.tkip.iv32;
254 }
255
256 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
257 cur_rx_iv32, p1k);
258 iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k);
259 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
260 cur_rx_iv32 + 1, p1k);
261 iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k);
262
263 memcpy(rx_mic_key,
264 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
265 IWL_MIC_KEY_SIZE);
266
267 data->use_tkip = true;
268 data->use_rsc_tsc = true;
269 break;
270 case WLAN_CIPHER_SUITE_CCMP:
271 if (sta) {
272 u8 *pn = seq.ccmp.pn;
273
274 aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
275 aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
276
277 ieee80211_get_key_tx_seq(key, &seq);
278 aes_tx_sc->pn = cpu_to_le64((u64)pn[5] |
279 ((u64)pn[4] << 8) |
280 ((u64)pn[3] << 16) |
281 ((u64)pn[2] << 24) |
282 ((u64)pn[1] << 32) |
283 ((u64)pn[0] << 40));
284 } else {
285 aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
286 }
287
288 /*
289 * For non-QoS this relies on the fact that both the uCode and
290 * mac80211 use TID 0 for checking the IV in the frames.
291 */
292 for (i = 0; i < IWL_NUM_RSC; i++) {
293 u8 *pn = seq.ccmp.pn;
294
295 ieee80211_get_key_rx_seq(key, i, &seq);
296 aes_sc->pn = cpu_to_le64((u64)pn[5] |
297 ((u64)pn[4] << 8) |
298 ((u64)pn[3] << 16) |
299 ((u64)pn[2] << 24) |
300 ((u64)pn[1] << 32) |
301 ((u64)pn[0] << 40));
302 }
303 data->use_rsc_tsc = true;
304 break;
305 }
306
307 /*
308 * The D3 firmware hardcodes the key offset 0 as the key it uses
309 * to transmit packets to the AP, i.e. the PTK.
310 */
311 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
312 key->hw_key_idx = 0;
313 mvm->ptk_ivlen = key->iv_len;
314 mvm->ptk_icvlen = key->icv_len;
315 } else {
316 data->gtk_key_idx++;
317 key->hw_key_idx = data->gtk_key_idx;
318 mvm->gtk_ivlen = key->iv_len;
319 mvm->gtk_icvlen = key->icv_len;
320 }
321
322 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, true);
323 data->error = ret != 0;
324 out_unlock:
325 mutex_unlock(&mvm->mutex);
326 }
327
328 static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
329 struct cfg80211_wowlan *wowlan)
330 {
331 struct iwl_wowlan_patterns_cmd *pattern_cmd;
332 struct iwl_host_cmd cmd = {
333 .id = WOWLAN_PATTERNS,
334 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
335 .flags = CMD_SYNC,
336 };
337 int i, err;
338
339 if (!wowlan->n_patterns)
340 return 0;
341
342 cmd.len[0] = sizeof(*pattern_cmd) +
343 wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern);
344
345 pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
346 if (!pattern_cmd)
347 return -ENOMEM;
348
349 pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
350
351 for (i = 0; i < wowlan->n_patterns; i++) {
352 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
353
354 memcpy(&pattern_cmd->patterns[i].mask,
355 wowlan->patterns[i].mask, mask_len);
356 memcpy(&pattern_cmd->patterns[i].pattern,
357 wowlan->patterns[i].pattern,
358 wowlan->patterns[i].pattern_len);
359 pattern_cmd->patterns[i].mask_size = mask_len;
360 pattern_cmd->patterns[i].pattern_size =
361 wowlan->patterns[i].pattern_len;
362 }
363
364 cmd.data[0] = pattern_cmd;
365 err = iwl_mvm_send_cmd(mvm, &cmd);
366 kfree(pattern_cmd);
367 return err;
368 }
369
370 static int iwl_mvm_send_proto_offload(struct iwl_mvm *mvm,
371 struct ieee80211_vif *vif)
372 {
373 struct iwl_proto_offload_cmd cmd = {};
374 #if IS_ENABLED(CONFIG_IPV6)
375 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
376 int i;
377
378 if (mvmvif->num_target_ipv6_addrs) {
379 cmd.enabled |= cpu_to_le32(IWL_D3_PROTO_OFFLOAD_NS);
380 memcpy(cmd.ndp_mac_addr, vif->addr, ETH_ALEN);
381 }
382
383 BUILD_BUG_ON(sizeof(cmd.target_ipv6_addr[i]) !=
384 sizeof(mvmvif->target_ipv6_addrs[i]));
385
386 for (i = 0; i < mvmvif->num_target_ipv6_addrs; i++)
387 memcpy(cmd.target_ipv6_addr[i],
388 &mvmvif->target_ipv6_addrs[i],
389 sizeof(cmd.target_ipv6_addr[i]));
390 #endif
391
392 if (vif->bss_conf.arp_addr_cnt) {
393 cmd.enabled |= cpu_to_le32(IWL_D3_PROTO_OFFLOAD_ARP);
394 cmd.host_ipv4_addr = vif->bss_conf.arp_addr_list[0];
395 memcpy(cmd.arp_mac_addr, vif->addr, ETH_ALEN);
396 }
397
398 if (!cmd.enabled)
399 return 0;
400
401 return iwl_mvm_send_cmd_pdu(mvm, PROT_OFFLOAD_CONFIG_CMD, CMD_SYNC,
402 sizeof(cmd), &cmd);
403 }
404
405 struct iwl_d3_iter_data {
406 struct iwl_mvm *mvm;
407 struct ieee80211_vif *vif;
408 bool error;
409 };
410
411 static void iwl_mvm_d3_iface_iterator(void *_data, u8 *mac,
412 struct ieee80211_vif *vif)
413 {
414 struct iwl_d3_iter_data *data = _data;
415 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
416
417 if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
418 return;
419
420 if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
421 return;
422
423 if (data->vif) {
424 IWL_ERR(data->mvm, "More than one managed interface active!\n");
425 data->error = true;
426 return;
427 }
428
429 data->vif = vif;
430 }
431
432 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
433 struct ieee80211_sta *ap_sta)
434 {
435 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
436 struct ieee80211_chanctx_conf *ctx;
437 u8 chains_static, chains_dynamic;
438 struct cfg80211_chan_def chandef;
439 int ret, i;
440 struct iwl_binding_cmd binding_cmd = {};
441 struct iwl_time_quota_cmd quota_cmd = {};
442 u32 status;
443
444 /* add back the PHY */
445 if (WARN_ON(!mvmvif->phy_ctxt))
446 return -EINVAL;
447
448 rcu_read_lock();
449 ctx = rcu_dereference(vif->chanctx_conf);
450 if (WARN_ON(!ctx)) {
451 rcu_read_unlock();
452 return -EINVAL;
453 }
454 chandef = ctx->def;
455 chains_static = ctx->rx_chains_static;
456 chains_dynamic = ctx->rx_chains_dynamic;
457 rcu_read_unlock();
458
459 ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
460 chains_static, chains_dynamic);
461 if (ret)
462 return ret;
463
464 /* add back the MAC */
465 mvmvif->uploaded = false;
466
467 if (WARN_ON(!vif->bss_conf.assoc))
468 return -EINVAL;
469 /* hack */
470 vif->bss_conf.assoc = false;
471 ret = iwl_mvm_mac_ctxt_add(mvm, vif);
472 vif->bss_conf.assoc = true;
473 if (ret)
474 return ret;
475
476 /* add back binding - XXX refactor? */
477 binding_cmd.id_and_color =
478 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
479 mvmvif->phy_ctxt->color));
480 binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
481 binding_cmd.phy =
482 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
483 mvmvif->phy_ctxt->color));
484 binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
485 mvmvif->color));
486 for (i = 1; i < MAX_MACS_IN_BINDING; i++)
487 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
488
489 status = 0;
490 ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
491 sizeof(binding_cmd), &binding_cmd,
492 &status);
493 if (ret) {
494 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
495 return ret;
496 }
497
498 if (status) {
499 IWL_ERR(mvm, "Binding command failed: %u\n", status);
500 return -EIO;
501 }
502
503 ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false);
504 if (ret)
505 return ret;
506 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
507
508 ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
509 if (ret)
510 return ret;
511
512 /* and some quota */
513 quota_cmd.quotas[0].id_and_color =
514 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
515 mvmvif->phy_ctxt->color));
516 quota_cmd.quotas[0].quota = cpu_to_le32(100);
517 quota_cmd.quotas[0].max_duration = cpu_to_le32(1000);
518
519 for (i = 1; i < MAX_BINDINGS; i++)
520 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
521
522 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, CMD_SYNC,
523 sizeof(quota_cmd), &quota_cmd);
524 if (ret)
525 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
526
527 return 0;
528 }
529
530 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
531 {
532 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
533 struct iwl_d3_iter_data suspend_iter_data = {
534 .mvm = mvm,
535 };
536 struct ieee80211_vif *vif;
537 struct iwl_mvm_vif *mvmvif;
538 struct ieee80211_sta *ap_sta;
539 struct iwl_mvm_sta *mvm_ap_sta;
540 struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
541 struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
542 struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
543 struct iwl_d3_manager_config d3_cfg_cmd = {};
544 struct wowlan_key_data key_data = {
545 .use_rsc_tsc = false,
546 .tkip = &tkip_cmd,
547 .use_tkip = false,
548 };
549 int ret, i;
550 u16 seq;
551 u8 old_aux_sta_id, old_ap_sta_id = IWL_MVM_STATION_COUNT;
552
553 if (WARN_ON(!wowlan))
554 return -EINVAL;
555
556 key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
557 if (!key_data.rsc_tsc)
558 return -ENOMEM;
559
560 mutex_lock(&mvm->mutex);
561
562 old_aux_sta_id = mvm->aux_sta.sta_id;
563
564 /* see if there's only a single BSS vif and it's associated */
565 ieee80211_iterate_active_interfaces_atomic(
566 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
567 iwl_mvm_d3_iface_iterator, &suspend_iter_data);
568
569 if (suspend_iter_data.error || !suspend_iter_data.vif) {
570 ret = 1;
571 goto out_noreset;
572 }
573
574 vif = suspend_iter_data.vif;
575 mvmvif = iwl_mvm_vif_from_mac80211(vif);
576
577 ap_sta = rcu_dereference_protected(
578 mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
579 lockdep_is_held(&mvm->mutex));
580 if (IS_ERR_OR_NULL(ap_sta)) {
581 ret = -EINVAL;
582 goto out_noreset;
583 }
584
585 mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
586
587 /*
588 * The D3 firmware still hardcodes the AP station ID for the
589 * BSS we're associated with as 0. Store the real STA ID here
590 * and assign 0. When we leave this function, we'll restore
591 * the original value for the resume code.
592 */
593 old_ap_sta_id = mvm_ap_sta->sta_id;
594 mvm_ap_sta->sta_id = 0;
595 mvmvif->ap_sta_id = 0;
596
597 /* TODO: wowlan_config_cmd.wowlan_ba_teardown_tids */
598
599 wowlan_config_cmd.is_11n_connection = ap_sta->ht_cap.ht_supported;
600
601 /*
602 * We know the last used seqno, and the uCode expects to know that
603 * one, it will increment before TX.
604 */
605 seq = mvm_ap_sta->last_seq_ctl & IEEE80211_SCTL_SEQ;
606 wowlan_config_cmd.non_qos_seq = cpu_to_le16(seq);
607
608 /*
609 * For QoS counters, we store the one to use next, so subtract 0x10
610 * since the uCode will add 0x10 *before* using the value while we
611 * increment after using the value (i.e. store the next value to use).
612 */
613 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
614 seq = mvm_ap_sta->tid_data[i].seq_number;
615 seq -= 0x10;
616 wowlan_config_cmd.qos_seq[i] = cpu_to_le16(seq);
617 }
618
619 if (wowlan->disconnect)
620 wowlan_config_cmd.wakeup_filter |=
621 cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
622 IWL_WOWLAN_WAKEUP_LINK_CHANGE);
623 if (wowlan->magic_pkt)
624 wowlan_config_cmd.wakeup_filter |=
625 cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
626 if (wowlan->gtk_rekey_failure)
627 wowlan_config_cmd.wakeup_filter |=
628 cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
629 if (wowlan->eap_identity_req)
630 wowlan_config_cmd.wakeup_filter |=
631 cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
632 if (wowlan->four_way_handshake)
633 wowlan_config_cmd.wakeup_filter |=
634 cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
635 if (wowlan->n_patterns)
636 wowlan_config_cmd.wakeup_filter |=
637 cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
638
639 if (wowlan->rfkill_release)
640 d3_cfg_cmd.wakeup_flags |=
641 cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
642
643 iwl_mvm_cancel_scan(mvm);
644
645 iwl_trans_stop_device(mvm->trans);
646
647 /*
648 * Set the HW restart bit -- this is mostly true as we're
649 * going to load new firmware and reprogram that, though
650 * the reprogramming is going to be manual to avoid adding
651 * all the MACs that aren't support.
652 * We don't have to clear up everything though because the
653 * reprogramming is manual. When we resume, we'll actually
654 * go through a proper restart sequence again to switch
655 * back to the runtime firmware image.
656 */
657 set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
658
659 /* We reprogram keys and shouldn't allocate new key indices */
660 memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
661
662 mvm->ptk_ivlen = 0;
663 mvm->ptk_icvlen = 0;
664 mvm->ptk_ivlen = 0;
665 mvm->ptk_icvlen = 0;
666
667 /*
668 * The D3 firmware still hardcodes the AP station ID for the
669 * BSS we're associated with as 0. As a result, we have to move
670 * the auxiliary station to ID 1 so the ID 0 remains free for
671 * the AP station for later.
672 * We set the sta_id to 1 here, and reset it to its previous
673 * value (that we stored above) later.
674 */
675 mvm->aux_sta.sta_id = 1;
676
677 ret = iwl_mvm_load_d3_fw(mvm);
678 if (ret)
679 goto out;
680
681 ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
682 if (ret)
683 goto out;
684
685 if (!iwlwifi_mod_params.sw_crypto) {
686 /*
687 * This needs to be unlocked due to lock ordering
688 * constraints. Since we're in the suspend path
689 * that isn't really a problem though.
690 */
691 mutex_unlock(&mvm->mutex);
692 ieee80211_iter_keys(mvm->hw, vif,
693 iwl_mvm_wowlan_program_keys,
694 &key_data);
695 mutex_lock(&mvm->mutex);
696 if (key_data.error) {
697 ret = -EIO;
698 goto out;
699 }
700
701 if (key_data.use_rsc_tsc) {
702 struct iwl_host_cmd rsc_tsc_cmd = {
703 .id = WOWLAN_TSC_RSC_PARAM,
704 .flags = CMD_SYNC,
705 .data[0] = key_data.rsc_tsc,
706 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
707 .len[0] = sizeof(*key_data.rsc_tsc),
708 };
709
710 ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
711 if (ret)
712 goto out;
713 }
714
715 if (key_data.use_tkip) {
716 ret = iwl_mvm_send_cmd_pdu(mvm,
717 WOWLAN_TKIP_PARAM,
718 CMD_SYNC, sizeof(tkip_cmd),
719 &tkip_cmd);
720 if (ret)
721 goto out;
722 }
723
724 if (mvmvif->rekey_data.valid) {
725 memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
726 memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
727 NL80211_KCK_LEN);
728 kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
729 memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
730 NL80211_KEK_LEN);
731 kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
732 kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
733
734 ret = iwl_mvm_send_cmd_pdu(mvm,
735 WOWLAN_KEK_KCK_MATERIAL,
736 CMD_SYNC,
737 sizeof(kek_kck_cmd),
738 &kek_kck_cmd);
739 if (ret)
740 goto out;
741 }
742 }
743
744 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION,
745 CMD_SYNC, sizeof(wowlan_config_cmd),
746 &wowlan_config_cmd);
747 if (ret)
748 goto out;
749
750 ret = iwl_mvm_send_patterns(mvm, wowlan);
751 if (ret)
752 goto out;
753
754 ret = iwl_mvm_send_proto_offload(mvm, vif);
755 if (ret)
756 goto out;
757
758 /* must be last -- this switches firmware state */
759 ret = iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD, CMD_SYNC,
760 sizeof(d3_cfg_cmd), &d3_cfg_cmd);
761 if (ret)
762 goto out;
763
764 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
765
766 iwl_trans_d3_suspend(mvm->trans);
767 out:
768 mvm->aux_sta.sta_id = old_aux_sta_id;
769 mvm_ap_sta->sta_id = old_ap_sta_id;
770 mvmvif->ap_sta_id = old_ap_sta_id;
771 out_noreset:
772 kfree(key_data.rsc_tsc);
773 if (ret < 0)
774 ieee80211_restart_hw(mvm->hw);
775
776 mutex_unlock(&mvm->mutex);
777
778 return ret;
779 }
780
781 static void iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
782 struct ieee80211_vif *vif)
783 {
784 u32 base = mvm->error_event_table;
785 struct error_table_start {
786 /* cf. struct iwl_error_event_table */
787 u32 valid;
788 u32 error_id;
789 } err_info;
790 struct cfg80211_wowlan_wakeup wakeup = {
791 .pattern_idx = -1,
792 };
793 struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
794 struct iwl_host_cmd cmd = {
795 .id = WOWLAN_GET_STATUSES,
796 .flags = CMD_SYNC | CMD_WANT_SKB,
797 };
798 struct iwl_wowlan_status *status;
799 u32 reasons;
800 int ret, len;
801 struct sk_buff *pkt = NULL;
802
803 iwl_trans_read_mem_bytes(mvm->trans, base,
804 &err_info, sizeof(err_info));
805
806 if (err_info.valid) {
807 IWL_INFO(mvm, "error table is valid (%d)\n",
808 err_info.valid);
809 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
810 wakeup.rfkill_release = true;
811 ieee80211_report_wowlan_wakeup(vif, &wakeup,
812 GFP_KERNEL);
813 }
814 return;
815 }
816
817 /* only for tracing for now */
818 ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, CMD_SYNC, 0, NULL);
819 if (ret)
820 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
821
822 ret = iwl_mvm_send_cmd(mvm, &cmd);
823 if (ret) {
824 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
825 return;
826 }
827
828 /* RF-kill already asserted again... */
829 if (!cmd.resp_pkt)
830 return;
831
832 len = le32_to_cpu(cmd.resp_pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
833 if (len - sizeof(struct iwl_cmd_header) < sizeof(*status)) {
834 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
835 goto out;
836 }
837
838 status = (void *)cmd.resp_pkt->data;
839
840 if (len - sizeof(struct iwl_cmd_header) !=
841 sizeof(*status) +
842 ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4)) {
843 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
844 goto out;
845 }
846
847 reasons = le32_to_cpu(status->wakeup_reasons);
848
849 if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
850 wakeup_report = NULL;
851 goto report;
852 }
853
854 if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
855 wakeup.magic_pkt = true;
856
857 if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
858 wakeup.pattern_idx =
859 le16_to_cpu(status->pattern_number);
860
861 if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
862 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
863 wakeup.disconnect = true;
864
865 if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
866 wakeup.gtk_rekey_failure = true;
867
868 if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
869 wakeup.rfkill_release = true;
870
871 if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
872 wakeup.eap_identity_req = true;
873
874 if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
875 wakeup.four_way_handshake = true;
876
877 if (status->wake_packet_bufsize) {
878 int pktsize = le32_to_cpu(status->wake_packet_bufsize);
879 int pktlen = le32_to_cpu(status->wake_packet_length);
880 const u8 *pktdata = status->wake_packet;
881 struct ieee80211_hdr *hdr = (void *)pktdata;
882 int truncated = pktlen - pktsize;
883
884 /* this would be a firmware bug */
885 if (WARN_ON_ONCE(truncated < 0))
886 truncated = 0;
887
888 if (ieee80211_is_data(hdr->frame_control)) {
889 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
890 int ivlen = 0, icvlen = 4; /* also FCS */
891
892 pkt = alloc_skb(pktsize, GFP_KERNEL);
893 if (!pkt)
894 goto report;
895
896 memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
897 pktdata += hdrlen;
898 pktsize -= hdrlen;
899
900 if (ieee80211_has_protected(hdr->frame_control)) {
901 if (is_multicast_ether_addr(hdr->addr1)) {
902 ivlen = mvm->gtk_ivlen;
903 icvlen += mvm->gtk_icvlen;
904 } else {
905 ivlen = mvm->ptk_ivlen;
906 icvlen += mvm->ptk_icvlen;
907 }
908 }
909
910 /* if truncated, FCS/ICV is (partially) gone */
911 if (truncated >= icvlen) {
912 icvlen = 0;
913 truncated -= icvlen;
914 } else {
915 icvlen -= truncated;
916 truncated = 0;
917 }
918
919 pktsize -= ivlen + icvlen;
920 pktdata += ivlen;
921
922 memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
923
924 if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
925 goto report;
926 wakeup.packet = pkt->data;
927 wakeup.packet_present_len = pkt->len;
928 wakeup.packet_len = pkt->len - truncated;
929 wakeup.packet_80211 = false;
930 } else {
931 int fcslen = 4;
932
933 if (truncated >= 4) {
934 truncated -= 4;
935 fcslen = 0;
936 } else {
937 fcslen -= truncated;
938 truncated = 0;
939 }
940 pktsize -= fcslen;
941 wakeup.packet = status->wake_packet;
942 wakeup.packet_present_len = pktsize;
943 wakeup.packet_len = pktlen - truncated;
944 wakeup.packet_80211 = true;
945 }
946 }
947
948 report:
949 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
950 kfree_skb(pkt);
951
952 out:
953 iwl_free_resp(&cmd);
954 }
955
956 int iwl_mvm_resume(struct ieee80211_hw *hw)
957 {
958 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
959 struct iwl_d3_iter_data resume_iter_data = {
960 .mvm = mvm,
961 };
962 struct ieee80211_vif *vif = NULL;
963 int ret;
964 enum iwl_d3_status d3_status;
965
966 mutex_lock(&mvm->mutex);
967
968 /* get the BSS vif pointer again */
969 ieee80211_iterate_active_interfaces_atomic(
970 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
971 iwl_mvm_d3_iface_iterator, &resume_iter_data);
972
973 if (WARN_ON(resume_iter_data.error || !resume_iter_data.vif))
974 goto out_unlock;
975
976 vif = resume_iter_data.vif;
977
978 ret = iwl_trans_d3_resume(mvm->trans, &d3_status);
979 if (ret)
980 goto out_unlock;
981
982 if (d3_status != IWL_D3_STATUS_ALIVE) {
983 IWL_INFO(mvm, "Device was reset during suspend\n");
984 goto out_unlock;
985 }
986
987 iwl_mvm_query_wakeup_reasons(mvm, vif);
988
989 out_unlock:
990 mutex_unlock(&mvm->mutex);
991
992 if (vif)
993 ieee80211_resume_disconnect(vif);
994
995 /* return 1 to reconfigure the device */
996 set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
997 return 1;
998 }
999
1000 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
1001 {
1002 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1003
1004 device_set_wakeup_enable(mvm->trans->dev, enabled);
1005 }
Linux kernel - Deliverables
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