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 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
23 * USA
24 *
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
27 *
28 * Contact Information:
29 * Intel Linux Wireless <ilw@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31 *
32 * BSD LICENSE
33 *
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
36 * All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 *
42 * * Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * * Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in
46 * the documentation and/or other materials provided with the
47 * distribution.
48 * * Neither the name Intel Corporation nor the names of its
49 * contributors may be used to endorse or promote products derived
50 * from this software without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63 *
64 *****************************************************************************/
65
66 #include <linux/etherdevice.h>
67 #include <linux/ip.h>
68 #include <linux/fs.h>
69 #include <net/cfg80211.h>
70 #include <net/ipv6.h>
71 #include <net/tcp.h>
72 #include <net/addrconf.h>
73 #include "iwl-modparams.h"
74 #include "fw-api.h"
75 #include "mvm.h"
76
iwl_mvm_set_rekey_data(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct cfg80211_gtk_rekey_data * data)77 void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw,
78 struct ieee80211_vif *vif,
79 struct cfg80211_gtk_rekey_data *data)
80 {
81 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
82 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
83
84 if (iwlwifi_mod_params.sw_crypto)
85 return;
86
87 mutex_lock(&mvm->mutex);
88
89 memcpy(mvmvif->rekey_data.kek, data->kek, NL80211_KEK_LEN);
90 memcpy(mvmvif->rekey_data.kck, data->kck, NL80211_KCK_LEN);
91 mvmvif->rekey_data.replay_ctr =
92 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
93 mvmvif->rekey_data.valid = true;
94
95 mutex_unlock(&mvm->mutex);
96 }
97
98 #if IS_ENABLED(CONFIG_IPV6)
iwl_mvm_ipv6_addr_change(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct inet6_dev * idev)99 void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
100 struct ieee80211_vif *vif,
101 struct inet6_dev *idev)
102 {
103 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
104 struct inet6_ifaddr *ifa;
105 int idx = 0;
106
107 read_lock_bh(&idev->lock);
108 list_for_each_entry(ifa, &idev->addr_list, if_list) {
109 mvmvif->target_ipv6_addrs[idx] = ifa->addr;
110 idx++;
111 if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_MAX)
112 break;
113 }
114 read_unlock_bh(&idev->lock);
115
116 mvmvif->num_target_ipv6_addrs = idx;
117 }
118 #endif
119
iwl_mvm_set_default_unicast_key(struct ieee80211_hw * hw,struct ieee80211_vif * vif,int idx)120 void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
121 struct ieee80211_vif *vif, int idx)
122 {
123 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
124
125 mvmvif->tx_key_idx = idx;
126 }
127
iwl_mvm_convert_p1k(u16 * p1k,__le16 * out)128 static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out)
129 {
130 int i;
131
132 for (i = 0; i < IWL_P1K_SIZE; i++)
133 out[i] = cpu_to_le16(p1k[i]);
134 }
135
136 struct wowlan_key_data {
137 struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc;
138 struct iwl_wowlan_tkip_params_cmd *tkip;
139 bool error, use_rsc_tsc, use_tkip;
140 int wep_key_idx;
141 };
142
iwl_mvm_wowlan_program_keys(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * key,void * _data)143 static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
144 struct ieee80211_vif *vif,
145 struct ieee80211_sta *sta,
146 struct ieee80211_key_conf *key,
147 void *_data)
148 {
149 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
150 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
151 struct wowlan_key_data *data = _data;
152 struct aes_sc *aes_sc, *aes_tx_sc = NULL;
153 struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
154 struct iwl_p1k_cache *rx_p1ks;
155 u8 *rx_mic_key;
156 struct ieee80211_key_seq seq;
157 u32 cur_rx_iv32 = 0;
158 u16 p1k[IWL_P1K_SIZE];
159 int ret, i;
160
161 mutex_lock(&mvm->mutex);
162
163 switch (key->cipher) {
164 case WLAN_CIPHER_SUITE_WEP40:
165 case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */
166 struct {
167 struct iwl_mvm_wep_key_cmd wep_key_cmd;
168 struct iwl_mvm_wep_key wep_key;
169 } __packed wkc = {
170 .wep_key_cmd.mac_id_n_color =
171 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
172 mvmvif->color)),
173 .wep_key_cmd.num_keys = 1,
174 /* firmware sets STA_KEY_FLG_WEP_13BYTES */
175 .wep_key_cmd.decryption_type = STA_KEY_FLG_WEP,
176 .wep_key.key_index = key->keyidx,
177 .wep_key.key_size = key->keylen,
178 };
179
180 /*
181 * This will fail -- the key functions don't set support
182 * pairwise WEP keys. However, that's better than silently
183 * failing WoWLAN. Or maybe not?
184 */
185 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
186 break;
187
188 memcpy(&wkc.wep_key.key[3], key->key, key->keylen);
189 if (key->keyidx == mvmvif->tx_key_idx) {
190 /* TX key must be at offset 0 */
191 wkc.wep_key.key_offset = 0;
192 } else {
193 /* others start at 1 */
194 data->wep_key_idx++;
195 wkc.wep_key.key_offset = data->wep_key_idx;
196 }
197
198 ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, 0, sizeof(wkc), &wkc);
199 data->error = ret != 0;
200
201 mvm->ptk_ivlen = key->iv_len;
202 mvm->ptk_icvlen = key->icv_len;
203 mvm->gtk_ivlen = key->iv_len;
204 mvm->gtk_icvlen = key->icv_len;
205
206 /* don't upload key again */
207 goto out_unlock;
208 }
209 default:
210 data->error = true;
211 goto out_unlock;
212 case WLAN_CIPHER_SUITE_AES_CMAC:
213 /*
214 * Ignore CMAC keys -- the WoWLAN firmware doesn't support them
215 * but we also shouldn't abort suspend due to that. It does have
216 * support for the IGTK key renewal, but doesn't really use the
217 * IGTK for anything. This means we could spuriously wake up or
218 * be deauthenticated, but that was considered acceptable.
219 */
220 goto out_unlock;
221 case WLAN_CIPHER_SUITE_TKIP:
222 if (sta) {
223 tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
224 tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
225
226 rx_p1ks = data->tkip->rx_uni;
227
228 ieee80211_get_key_tx_seq(key, &seq);
229 tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
230 tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
231
232 ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
233 iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k);
234
235 memcpy(data->tkip->mic_keys.tx,
236 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
237 IWL_MIC_KEY_SIZE);
238
239 rx_mic_key = data->tkip->mic_keys.rx_unicast;
240 } else {
241 tkip_sc =
242 data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
243 rx_p1ks = data->tkip->rx_multi;
244 rx_mic_key = data->tkip->mic_keys.rx_mcast;
245 }
246
247 /*
248 * For non-QoS this relies on the fact that both the uCode and
249 * mac80211 use TID 0 (as they need to to avoid replay attacks)
250 * for checking the IV in the frames.
251 */
252 for (i = 0; i < IWL_NUM_RSC; i++) {
253 ieee80211_get_key_rx_seq(key, i, &seq);
254 tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
255 tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
256 /* wrapping isn't allowed, AP must rekey */
257 if (seq.tkip.iv32 > cur_rx_iv32)
258 cur_rx_iv32 = seq.tkip.iv32;
259 }
260
261 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
262 cur_rx_iv32, p1k);
263 iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k);
264 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
265 cur_rx_iv32 + 1, p1k);
266 iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k);
267
268 memcpy(rx_mic_key,
269 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
270 IWL_MIC_KEY_SIZE);
271
272 data->use_tkip = true;
273 data->use_rsc_tsc = true;
274 break;
275 case WLAN_CIPHER_SUITE_CCMP:
276 if (sta) {
277 u64 pn64;
278
279 aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
280 aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
281
282 pn64 = atomic64_read(&key->tx_pn);
283 aes_tx_sc->pn = cpu_to_le64(pn64);
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[i].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 mvm->ptk_ivlen = key->iv_len;
313 mvm->ptk_icvlen = key->icv_len;
314 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, 0);
315 } else {
316 /*
317 * firmware only supports TSC/RSC for a single key,
318 * so if there are multiple keep overwriting them
319 * with new ones -- this relies on mac80211 doing
320 * list_add_tail().
321 */
322 mvm->gtk_ivlen = key->iv_len;
323 mvm->gtk_icvlen = key->icv_len;
324 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, 1);
325 }
326
327 data->error = ret != 0;
328 out_unlock:
329 mutex_unlock(&mvm->mutex);
330 }
331
iwl_mvm_send_patterns(struct iwl_mvm * mvm,struct cfg80211_wowlan * wowlan)332 static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
333 struct cfg80211_wowlan *wowlan)
334 {
335 struct iwl_wowlan_patterns_cmd *pattern_cmd;
336 struct iwl_host_cmd cmd = {
337 .id = WOWLAN_PATTERNS,
338 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
339 };
340 int i, err;
341
342 if (!wowlan->n_patterns)
343 return 0;
344
345 cmd.len[0] = sizeof(*pattern_cmd) +
346 wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern);
347
348 pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
349 if (!pattern_cmd)
350 return -ENOMEM;
351
352 pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
353
354 for (i = 0; i < wowlan->n_patterns; i++) {
355 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
356
357 memcpy(&pattern_cmd->patterns[i].mask,
358 wowlan->patterns[i].mask, mask_len);
359 memcpy(&pattern_cmd->patterns[i].pattern,
360 wowlan->patterns[i].pattern,
361 wowlan->patterns[i].pattern_len);
362 pattern_cmd->patterns[i].mask_size = mask_len;
363 pattern_cmd->patterns[i].pattern_size =
364 wowlan->patterns[i].pattern_len;
365 }
366
367 cmd.data[0] = pattern_cmd;
368 err = iwl_mvm_send_cmd(mvm, &cmd);
369 kfree(pattern_cmd);
370 return err;
371 }
372
373 enum iwl_mvm_tcp_packet_type {
374 MVM_TCP_TX_SYN,
375 MVM_TCP_RX_SYNACK,
376 MVM_TCP_TX_DATA,
377 MVM_TCP_RX_ACK,
378 MVM_TCP_RX_WAKE,
379 MVM_TCP_TX_FIN,
380 };
381
pseudo_hdr_check(int len,__be32 saddr,__be32 daddr)382 static __le16 pseudo_hdr_check(int len, __be32 saddr, __be32 daddr)
383 {
384 __sum16 check = tcp_v4_check(len, saddr, daddr, 0);
385 return cpu_to_le16(be16_to_cpu((__force __be16)check));
386 }
387
iwl_mvm_build_tcp_packet(struct ieee80211_vif * vif,struct cfg80211_wowlan_tcp * tcp,void * _pkt,u8 * mask,__le16 * pseudo_hdr_csum,enum iwl_mvm_tcp_packet_type ptype)388 static void iwl_mvm_build_tcp_packet(struct ieee80211_vif *vif,
389 struct cfg80211_wowlan_tcp *tcp,
390 void *_pkt, u8 *mask,
391 __le16 *pseudo_hdr_csum,
392 enum iwl_mvm_tcp_packet_type ptype)
393 {
394 struct {
395 struct ethhdr eth;
396 struct iphdr ip;
397 struct tcphdr tcp;
398 u8 data[];
399 } __packed *pkt = _pkt;
400 u16 ip_tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
401 int i;
402
403 pkt->eth.h_proto = cpu_to_be16(ETH_P_IP),
404 pkt->ip.version = 4;
405 pkt->ip.ihl = 5;
406 pkt->ip.protocol = IPPROTO_TCP;
407
408 switch (ptype) {
409 case MVM_TCP_TX_SYN:
410 case MVM_TCP_TX_DATA:
411 case MVM_TCP_TX_FIN:
412 memcpy(pkt->eth.h_dest, tcp->dst_mac, ETH_ALEN);
413 memcpy(pkt->eth.h_source, vif->addr, ETH_ALEN);
414 pkt->ip.ttl = 128;
415 pkt->ip.saddr = tcp->src;
416 pkt->ip.daddr = tcp->dst;
417 pkt->tcp.source = cpu_to_be16(tcp->src_port);
418 pkt->tcp.dest = cpu_to_be16(tcp->dst_port);
419 /* overwritten for TX SYN later */
420 pkt->tcp.doff = sizeof(struct tcphdr) / 4;
421 pkt->tcp.window = cpu_to_be16(65000);
422 break;
423 case MVM_TCP_RX_SYNACK:
424 case MVM_TCP_RX_ACK:
425 case MVM_TCP_RX_WAKE:
426 memcpy(pkt->eth.h_dest, vif->addr, ETH_ALEN);
427 memcpy(pkt->eth.h_source, tcp->dst_mac, ETH_ALEN);
428 pkt->ip.saddr = tcp->dst;
429 pkt->ip.daddr = tcp->src;
430 pkt->tcp.source = cpu_to_be16(tcp->dst_port);
431 pkt->tcp.dest = cpu_to_be16(tcp->src_port);
432 break;
433 default:
434 WARN_ON(1);
435 return;
436 }
437
438 switch (ptype) {
439 case MVM_TCP_TX_SYN:
440 /* firmware assumes 8 option bytes - 8 NOPs for now */
441 memset(pkt->data, 0x01, 8);
442 ip_tot_len += 8;
443 pkt->tcp.doff = (sizeof(struct tcphdr) + 8) / 4;
444 pkt->tcp.syn = 1;
445 break;
446 case MVM_TCP_TX_DATA:
447 ip_tot_len += tcp->payload_len;
448 memcpy(pkt->data, tcp->payload, tcp->payload_len);
449 pkt->tcp.psh = 1;
450 pkt->tcp.ack = 1;
451 break;
452 case MVM_TCP_TX_FIN:
453 pkt->tcp.fin = 1;
454 pkt->tcp.ack = 1;
455 break;
456 case MVM_TCP_RX_SYNACK:
457 pkt->tcp.syn = 1;
458 pkt->tcp.ack = 1;
459 break;
460 case MVM_TCP_RX_ACK:
461 pkt->tcp.ack = 1;
462 break;
463 case MVM_TCP_RX_WAKE:
464 ip_tot_len += tcp->wake_len;
465 pkt->tcp.psh = 1;
466 pkt->tcp.ack = 1;
467 memcpy(pkt->data, tcp->wake_data, tcp->wake_len);
468 break;
469 }
470
471 switch (ptype) {
472 case MVM_TCP_TX_SYN:
473 case MVM_TCP_TX_DATA:
474 case MVM_TCP_TX_FIN:
475 pkt->ip.tot_len = cpu_to_be16(ip_tot_len);
476 pkt->ip.check = ip_fast_csum(&pkt->ip, pkt->ip.ihl);
477 break;
478 case MVM_TCP_RX_WAKE:
479 for (i = 0; i < DIV_ROUND_UP(tcp->wake_len, 8); i++) {
480 u8 tmp = tcp->wake_mask[i];
481 mask[i + 6] |= tmp << 6;
482 if (i + 1 < DIV_ROUND_UP(tcp->wake_len, 8))
483 mask[i + 7] = tmp >> 2;
484 }
485 /* fall through for ethernet/IP/TCP headers mask */
486 case MVM_TCP_RX_SYNACK:
487 case MVM_TCP_RX_ACK:
488 mask[0] = 0xff; /* match ethernet */
489 /*
490 * match ethernet, ip.version, ip.ihl
491 * the ip.ihl half byte is really masked out by firmware
492 */
493 mask[1] = 0x7f;
494 mask[2] = 0x80; /* match ip.protocol */
495 mask[3] = 0xfc; /* match ip.saddr, ip.daddr */
496 mask[4] = 0x3f; /* match ip.daddr, tcp.source, tcp.dest */
497 mask[5] = 0x80; /* match tcp flags */
498 /* leave rest (0 or set for MVM_TCP_RX_WAKE) */
499 break;
500 };
501
502 *pseudo_hdr_csum = pseudo_hdr_check(ip_tot_len - sizeof(struct iphdr),
503 pkt->ip.saddr, pkt->ip.daddr);
504 }
505
iwl_mvm_send_remote_wake_cfg(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_wowlan_tcp * tcp)506 static int iwl_mvm_send_remote_wake_cfg(struct iwl_mvm *mvm,
507 struct ieee80211_vif *vif,
508 struct cfg80211_wowlan_tcp *tcp)
509 {
510 struct iwl_wowlan_remote_wake_config *cfg;
511 struct iwl_host_cmd cmd = {
512 .id = REMOTE_WAKE_CONFIG_CMD,
513 .len = { sizeof(*cfg), },
514 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
515 };
516 int ret;
517
518 if (!tcp)
519 return 0;
520
521 cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
522 if (!cfg)
523 return -ENOMEM;
524 cmd.data[0] = cfg;
525
526 cfg->max_syn_retries = 10;
527 cfg->max_data_retries = 10;
528 cfg->tcp_syn_ack_timeout = 1; /* seconds */
529 cfg->tcp_ack_timeout = 1; /* seconds */
530
531 /* SYN (TX) */
532 iwl_mvm_build_tcp_packet(
533 vif, tcp, cfg->syn_tx.data, NULL,
534 &cfg->syn_tx.info.tcp_pseudo_header_checksum,
535 MVM_TCP_TX_SYN);
536 cfg->syn_tx.info.tcp_payload_length = 0;
537
538 /* SYN/ACK (RX) */
539 iwl_mvm_build_tcp_packet(
540 vif, tcp, cfg->synack_rx.data, cfg->synack_rx.rx_mask,
541 &cfg->synack_rx.info.tcp_pseudo_header_checksum,
542 MVM_TCP_RX_SYNACK);
543 cfg->synack_rx.info.tcp_payload_length = 0;
544
545 /* KEEPALIVE/ACK (TX) */
546 iwl_mvm_build_tcp_packet(
547 vif, tcp, cfg->keepalive_tx.data, NULL,
548 &cfg->keepalive_tx.info.tcp_pseudo_header_checksum,
549 MVM_TCP_TX_DATA);
550 cfg->keepalive_tx.info.tcp_payload_length =
551 cpu_to_le16(tcp->payload_len);
552 cfg->sequence_number_offset = tcp->payload_seq.offset;
553 /* length must be 0..4, the field is little endian */
554 cfg->sequence_number_length = tcp->payload_seq.len;
555 cfg->initial_sequence_number = cpu_to_le32(tcp->payload_seq.start);
556 cfg->keepalive_interval = cpu_to_le16(tcp->data_interval);
557 if (tcp->payload_tok.len) {
558 cfg->token_offset = tcp->payload_tok.offset;
559 cfg->token_length = tcp->payload_tok.len;
560 cfg->num_tokens =
561 cpu_to_le16(tcp->tokens_size % tcp->payload_tok.len);
562 memcpy(cfg->tokens, tcp->payload_tok.token_stream,
563 tcp->tokens_size);
564 } else {
565 /* set tokens to max value to almost never run out */
566 cfg->num_tokens = cpu_to_le16(65535);
567 }
568
569 /* ACK (RX) */
570 iwl_mvm_build_tcp_packet(
571 vif, tcp, cfg->keepalive_ack_rx.data,
572 cfg->keepalive_ack_rx.rx_mask,
573 &cfg->keepalive_ack_rx.info.tcp_pseudo_header_checksum,
574 MVM_TCP_RX_ACK);
575 cfg->keepalive_ack_rx.info.tcp_payload_length = 0;
576
577 /* WAKEUP (RX) */
578 iwl_mvm_build_tcp_packet(
579 vif, tcp, cfg->wake_rx.data, cfg->wake_rx.rx_mask,
580 &cfg->wake_rx.info.tcp_pseudo_header_checksum,
581 MVM_TCP_RX_WAKE);
582 cfg->wake_rx.info.tcp_payload_length =
583 cpu_to_le16(tcp->wake_len);
584
585 /* FIN */
586 iwl_mvm_build_tcp_packet(
587 vif, tcp, cfg->fin_tx.data, NULL,
588 &cfg->fin_tx.info.tcp_pseudo_header_checksum,
589 MVM_TCP_TX_FIN);
590 cfg->fin_tx.info.tcp_payload_length = 0;
591
592 ret = iwl_mvm_send_cmd(mvm, &cmd);
593 kfree(cfg);
594
595 return ret;
596 }
597
iwl_mvm_d3_reprogram(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * ap_sta)598 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
599 struct ieee80211_sta *ap_sta)
600 {
601 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
602 struct ieee80211_chanctx_conf *ctx;
603 u8 chains_static, chains_dynamic;
604 struct cfg80211_chan_def chandef;
605 int ret, i;
606 struct iwl_binding_cmd binding_cmd = {};
607 struct iwl_time_quota_cmd quota_cmd = {};
608 u32 status;
609
610 /* add back the PHY */
611 if (WARN_ON(!mvmvif->phy_ctxt))
612 return -EINVAL;
613
614 rcu_read_lock();
615 ctx = rcu_dereference(vif->chanctx_conf);
616 if (WARN_ON(!ctx)) {
617 rcu_read_unlock();
618 return -EINVAL;
619 }
620 chandef = ctx->def;
621 chains_static = ctx->rx_chains_static;
622 chains_dynamic = ctx->rx_chains_dynamic;
623 rcu_read_unlock();
624
625 ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
626 chains_static, chains_dynamic);
627 if (ret)
628 return ret;
629
630 /* add back the MAC */
631 mvmvif->uploaded = false;
632
633 if (WARN_ON(!vif->bss_conf.assoc))
634 return -EINVAL;
635
636 ret = iwl_mvm_mac_ctxt_add(mvm, vif);
637 if (ret)
638 return ret;
639
640 /* add back binding - XXX refactor? */
641 binding_cmd.id_and_color =
642 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
643 mvmvif->phy_ctxt->color));
644 binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
645 binding_cmd.phy =
646 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
647 mvmvif->phy_ctxt->color));
648 binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
649 mvmvif->color));
650 for (i = 1; i < MAX_MACS_IN_BINDING; i++)
651 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
652
653 status = 0;
654 ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
655 sizeof(binding_cmd), &binding_cmd,
656 &status);
657 if (ret) {
658 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
659 return ret;
660 }
661
662 if (status) {
663 IWL_ERR(mvm, "Binding command failed: %u\n", status);
664 return -EIO;
665 }
666
667 ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false);
668 if (ret)
669 return ret;
670 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
671
672 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
673 if (ret)
674 return ret;
675
676 /* and some quota */
677 quota_cmd.quotas[0].id_and_color =
678 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
679 mvmvif->phy_ctxt->color));
680 quota_cmd.quotas[0].quota = cpu_to_le32(IWL_MVM_MAX_QUOTA);
681 quota_cmd.quotas[0].max_duration = cpu_to_le32(IWL_MVM_MAX_QUOTA);
682
683 for (i = 1; i < MAX_BINDINGS; i++)
684 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
685
686 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
687 sizeof(quota_cmd), "a_cmd);
688 if (ret)
689 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
690
691 if (iwl_mvm_is_lar_supported(mvm) && iwl_mvm_init_fw_regd(mvm))
692 IWL_ERR(mvm, "Failed to initialize D3 LAR information\n");
693
694 return 0;
695 }
696
iwl_mvm_get_last_nonqos_seq(struct iwl_mvm * mvm,struct ieee80211_vif * vif)697 static int iwl_mvm_get_last_nonqos_seq(struct iwl_mvm *mvm,
698 struct ieee80211_vif *vif)
699 {
700 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
701 struct iwl_nonqos_seq_query_cmd query_cmd = {
702 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_GET),
703 .mac_id_n_color =
704 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
705 mvmvif->color)),
706 };
707 struct iwl_host_cmd cmd = {
708 .id = NON_QOS_TX_COUNTER_CMD,
709 .flags = CMD_WANT_SKB,
710 };
711 int err;
712 u32 size;
713
714 cmd.data[0] = &query_cmd;
715 cmd.len[0] = sizeof(query_cmd);
716
717 err = iwl_mvm_send_cmd(mvm, &cmd);
718 if (err)
719 return err;
720
721 size = iwl_rx_packet_payload_len(cmd.resp_pkt);
722 if (size < sizeof(__le16)) {
723 err = -EINVAL;
724 } else {
725 err = le16_to_cpup((__le16 *)cmd.resp_pkt->data);
726 /* firmware returns next, not last-used seqno */
727 err = (u16) (err - 0x10);
728 }
729
730 iwl_free_resp(&cmd);
731 return err;
732 }
733
iwl_mvm_set_last_nonqos_seq(struct iwl_mvm * mvm,struct ieee80211_vif * vif)734 void iwl_mvm_set_last_nonqos_seq(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
735 {
736 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
737 struct iwl_nonqos_seq_query_cmd query_cmd = {
738 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_SET),
739 .mac_id_n_color =
740 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
741 mvmvif->color)),
742 .value = cpu_to_le16(mvmvif->seqno),
743 };
744
745 /* return if called during restart, not resume from D3 */
746 if (!mvmvif->seqno_valid)
747 return;
748
749 mvmvif->seqno_valid = false;
750
751 if (iwl_mvm_send_cmd_pdu(mvm, NON_QOS_TX_COUNTER_CMD, 0,
752 sizeof(query_cmd), &query_cmd))
753 IWL_ERR(mvm, "failed to set non-QoS seqno\n");
754 }
755
iwl_mvm_switch_to_d3(struct iwl_mvm * mvm)756 static int iwl_mvm_switch_to_d3(struct iwl_mvm *mvm)
757 {
758 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
759
760 iwl_trans_stop_device(mvm->trans);
761
762 /*
763 * Set the HW restart bit -- this is mostly true as we're
764 * going to load new firmware and reprogram that, though
765 * the reprogramming is going to be manual to avoid adding
766 * all the MACs that aren't support.
767 * We don't have to clear up everything though because the
768 * reprogramming is manual. When we resume, we'll actually
769 * go through a proper restart sequence again to switch
770 * back to the runtime firmware image.
771 */
772 set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
773
774 mvm->ptk_ivlen = 0;
775 mvm->ptk_icvlen = 0;
776 mvm->ptk_ivlen = 0;
777 mvm->ptk_icvlen = 0;
778
779 return iwl_mvm_load_d3_fw(mvm);
780 }
781
782 static int
iwl_mvm_get_wowlan_config(struct iwl_mvm * mvm,struct cfg80211_wowlan * wowlan,struct iwl_wowlan_config_cmd * wowlan_config_cmd,struct ieee80211_vif * vif,struct iwl_mvm_vif * mvmvif,struct ieee80211_sta * ap_sta)783 iwl_mvm_get_wowlan_config(struct iwl_mvm *mvm,
784 struct cfg80211_wowlan *wowlan,
785 struct iwl_wowlan_config_cmd *wowlan_config_cmd,
786 struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
787 struct ieee80211_sta *ap_sta)
788 {
789 int ret;
790 struct iwl_mvm_sta *mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
791
792 /* TODO: wowlan_config_cmd->wowlan_ba_teardown_tids */
793
794 wowlan_config_cmd->is_11n_connection =
795 ap_sta->ht_cap.ht_supported;
796
797 /* Query the last used seqno and set it */
798 ret = iwl_mvm_get_last_nonqos_seq(mvm, vif);
799 if (ret < 0)
800 return ret;
801
802 wowlan_config_cmd->non_qos_seq = cpu_to_le16(ret);
803
804 iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, wowlan_config_cmd);
805
806 if (wowlan->disconnect)
807 wowlan_config_cmd->wakeup_filter |=
808 cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
809 IWL_WOWLAN_WAKEUP_LINK_CHANGE);
810 if (wowlan->magic_pkt)
811 wowlan_config_cmd->wakeup_filter |=
812 cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
813 if (wowlan->gtk_rekey_failure)
814 wowlan_config_cmd->wakeup_filter |=
815 cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
816 if (wowlan->eap_identity_req)
817 wowlan_config_cmd->wakeup_filter |=
818 cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
819 if (wowlan->four_way_handshake)
820 wowlan_config_cmd->wakeup_filter |=
821 cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
822 if (wowlan->n_patterns)
823 wowlan_config_cmd->wakeup_filter |=
824 cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
825
826 if (wowlan->rfkill_release)
827 wowlan_config_cmd->wakeup_filter |=
828 cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
829
830 if (wowlan->tcp) {
831 /*
832 * Set the "link change" (really "link lost") flag as well
833 * since that implies losing the TCP connection.
834 */
835 wowlan_config_cmd->wakeup_filter |=
836 cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
837 IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
838 IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
839 IWL_WOWLAN_WAKEUP_LINK_CHANGE);
840 }
841
842 return 0;
843 }
844
845 static int
iwl_mvm_wowlan_config(struct iwl_mvm * mvm,struct cfg80211_wowlan * wowlan,struct iwl_wowlan_config_cmd * wowlan_config_cmd,struct ieee80211_vif * vif,struct iwl_mvm_vif * mvmvif,struct ieee80211_sta * ap_sta)846 iwl_mvm_wowlan_config(struct iwl_mvm *mvm,
847 struct cfg80211_wowlan *wowlan,
848 struct iwl_wowlan_config_cmd *wowlan_config_cmd,
849 struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
850 struct ieee80211_sta *ap_sta)
851 {
852 struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
853 struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
854 struct wowlan_key_data key_data = {
855 .use_rsc_tsc = false,
856 .tkip = &tkip_cmd,
857 .use_tkip = false,
858 };
859 int ret;
860
861 ret = iwl_mvm_switch_to_d3(mvm);
862 if (ret)
863 return ret;
864
865 ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
866 if (ret)
867 return ret;
868
869 key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
870 if (!key_data.rsc_tsc)
871 return -ENOMEM;
872
873 if (!iwlwifi_mod_params.sw_crypto) {
874 /*
875 * This needs to be unlocked due to lock ordering
876 * constraints. Since we're in the suspend path
877 * that isn't really a problem though.
878 */
879 mutex_unlock(&mvm->mutex);
880 ieee80211_iter_keys(mvm->hw, vif,
881 iwl_mvm_wowlan_program_keys,
882 &key_data);
883 mutex_lock(&mvm->mutex);
884 if (key_data.error) {
885 ret = -EIO;
886 goto out;
887 }
888
889 if (key_data.use_rsc_tsc) {
890 struct iwl_host_cmd rsc_tsc_cmd = {
891 .id = WOWLAN_TSC_RSC_PARAM,
892 .data[0] = key_data.rsc_tsc,
893 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
894 .len[0] = sizeof(*key_data.rsc_tsc),
895 };
896
897 ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
898 if (ret)
899 goto out;
900 }
901
902 if (key_data.use_tkip) {
903 ret = iwl_mvm_send_cmd_pdu(mvm,
904 WOWLAN_TKIP_PARAM,
905 0, sizeof(tkip_cmd),
906 &tkip_cmd);
907 if (ret)
908 goto out;
909 }
910
911 if (mvmvif->rekey_data.valid) {
912 memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
913 memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
914 NL80211_KCK_LEN);
915 kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
916 memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
917 NL80211_KEK_LEN);
918 kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
919 kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
920
921 ret = iwl_mvm_send_cmd_pdu(mvm,
922 WOWLAN_KEK_KCK_MATERIAL, 0,
923 sizeof(kek_kck_cmd),
924 &kek_kck_cmd);
925 if (ret)
926 goto out;
927 }
928 }
929
930 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
931 sizeof(*wowlan_config_cmd),
932 wowlan_config_cmd);
933 if (ret)
934 goto out;
935
936 ret = iwl_mvm_send_patterns(mvm, wowlan);
937 if (ret)
938 goto out;
939
940 ret = iwl_mvm_send_proto_offload(mvm, vif, false, 0);
941 if (ret)
942 goto out;
943
944 ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
945
946 out:
947 kfree(key_data.rsc_tsc);
948 return ret;
949 }
950
951 static int
iwl_mvm_netdetect_config(struct iwl_mvm * mvm,struct cfg80211_wowlan * wowlan,struct cfg80211_sched_scan_request * nd_config,struct ieee80211_vif * vif)952 iwl_mvm_netdetect_config(struct iwl_mvm *mvm,
953 struct cfg80211_wowlan *wowlan,
954 struct cfg80211_sched_scan_request *nd_config,
955 struct ieee80211_vif *vif)
956 {
957 struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
958 int ret;
959
960 ret = iwl_mvm_switch_to_d3(mvm);
961 if (ret)
962 return ret;
963
964 /* rfkill release can be either for wowlan or netdetect */
965 if (wowlan->rfkill_release)
966 wowlan_config_cmd.wakeup_filter |=
967 cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
968
969 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
970 sizeof(wowlan_config_cmd),
971 &wowlan_config_cmd);
972 if (ret)
973 return ret;
974
975 ret = iwl_mvm_sched_scan_start(mvm, vif, nd_config, &mvm->nd_ies,
976 IWL_MVM_SCAN_NETDETECT);
977 if (ret)
978 return ret;
979
980 if (WARN_ON(mvm->nd_match_sets || mvm->nd_channels))
981 return -EBUSY;
982
983 /* save the sched scan matchsets... */
984 if (nd_config->n_match_sets) {
985 mvm->nd_match_sets = kmemdup(nd_config->match_sets,
986 sizeof(*nd_config->match_sets) *
987 nd_config->n_match_sets,
988 GFP_KERNEL);
989 if (mvm->nd_match_sets)
990 mvm->n_nd_match_sets = nd_config->n_match_sets;
991 }
992
993 /* ...and the sched scan channels for later reporting */
994 mvm->nd_channels = kmemdup(nd_config->channels,
995 sizeof(*nd_config->channels) *
996 nd_config->n_channels,
997 GFP_KERNEL);
998 if (mvm->nd_channels)
999 mvm->n_nd_channels = nd_config->n_channels;
1000
1001 return 0;
1002 }
1003
iwl_mvm_free_nd(struct iwl_mvm * mvm)1004 static void iwl_mvm_free_nd(struct iwl_mvm *mvm)
1005 {
1006 kfree(mvm->nd_match_sets);
1007 mvm->nd_match_sets = NULL;
1008 mvm->n_nd_match_sets = 0;
1009 kfree(mvm->nd_channels);
1010 mvm->nd_channels = NULL;
1011 mvm->n_nd_channels = 0;
1012 }
1013
__iwl_mvm_suspend(struct ieee80211_hw * hw,struct cfg80211_wowlan * wowlan,bool test)1014 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
1015 struct cfg80211_wowlan *wowlan,
1016 bool test)
1017 {
1018 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1019 struct ieee80211_vif *vif = NULL;
1020 struct iwl_mvm_vif *mvmvif = NULL;
1021 struct ieee80211_sta *ap_sta = NULL;
1022 struct iwl_d3_manager_config d3_cfg_cmd_data = {
1023 /*
1024 * Program the minimum sleep time to 10 seconds, as many
1025 * platforms have issues processing a wakeup signal while
1026 * still being in the process of suspending.
1027 */
1028 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
1029 };
1030 struct iwl_host_cmd d3_cfg_cmd = {
1031 .id = D3_CONFIG_CMD,
1032 .flags = CMD_WANT_SKB,
1033 .data[0] = &d3_cfg_cmd_data,
1034 .len[0] = sizeof(d3_cfg_cmd_data),
1035 };
1036 int ret;
1037 int len __maybe_unused;
1038
1039 if (!wowlan) {
1040 /*
1041 * mac80211 shouldn't get here, but for D3 test
1042 * it doesn't warrant a warning
1043 */
1044 WARN_ON(!test);
1045 return -EINVAL;
1046 }
1047
1048 mutex_lock(&mvm->mutex);
1049
1050 vif = iwl_mvm_get_bss_vif(mvm);
1051 if (IS_ERR_OR_NULL(vif)) {
1052 ret = 1;
1053 goto out_noreset;
1054 }
1055
1056 mvmvif = iwl_mvm_vif_from_mac80211(vif);
1057
1058 if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT) {
1059 /* if we're not associated, this must be netdetect */
1060 if (!wowlan->nd_config && !mvm->nd_config) {
1061 ret = 1;
1062 goto out_noreset;
1063 }
1064
1065 ret = iwl_mvm_netdetect_config(
1066 mvm, wowlan, wowlan->nd_config ?: mvm->nd_config, vif);
1067 if (ret)
1068 goto out;
1069
1070 mvm->net_detect = true;
1071 } else {
1072 struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
1073
1074 ap_sta = rcu_dereference_protected(
1075 mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
1076 lockdep_is_held(&mvm->mutex));
1077 if (IS_ERR_OR_NULL(ap_sta)) {
1078 ret = -EINVAL;
1079 goto out_noreset;
1080 }
1081
1082 ret = iwl_mvm_get_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1083 vif, mvmvif, ap_sta);
1084 if (ret)
1085 goto out_noreset;
1086 ret = iwl_mvm_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1087 vif, mvmvif, ap_sta);
1088 if (ret)
1089 goto out;
1090
1091 mvm->net_detect = false;
1092 }
1093
1094 ret = iwl_mvm_power_update_device(mvm);
1095 if (ret)
1096 goto out;
1097
1098 ret = iwl_mvm_power_update_mac(mvm);
1099 if (ret)
1100 goto out;
1101
1102 #ifdef CONFIG_IWLWIFI_DEBUGFS
1103 if (mvm->d3_wake_sysassert)
1104 d3_cfg_cmd_data.wakeup_flags |=
1105 cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1106 #endif
1107
1108 /* must be last -- this switches firmware state */
1109 ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1110 if (ret)
1111 goto out;
1112 #ifdef CONFIG_IWLWIFI_DEBUGFS
1113 len = iwl_rx_packet_payload_len(d3_cfg_cmd.resp_pkt);
1114 if (len >= sizeof(u32)) {
1115 mvm->d3_test_pme_ptr =
1116 le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1117 }
1118 #endif
1119 iwl_free_resp(&d3_cfg_cmd);
1120
1121 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1122
1123 iwl_trans_d3_suspend(mvm->trans, test);
1124 out:
1125 if (ret < 0) {
1126 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1127 ieee80211_restart_hw(mvm->hw);
1128 iwl_mvm_free_nd(mvm);
1129 }
1130 out_noreset:
1131 mutex_unlock(&mvm->mutex);
1132
1133 return ret;
1134 }
1135
iwl_mvm_enter_d0i3_sync(struct iwl_mvm * mvm)1136 static int iwl_mvm_enter_d0i3_sync(struct iwl_mvm *mvm)
1137 {
1138 struct iwl_notification_wait wait_d3;
1139 static const u16 d3_notif[] = { D3_CONFIG_CMD };
1140 int ret;
1141
1142 iwl_init_notification_wait(&mvm->notif_wait, &wait_d3,
1143 d3_notif, ARRAY_SIZE(d3_notif),
1144 NULL, NULL);
1145
1146 ret = iwl_mvm_enter_d0i3(mvm->hw->priv);
1147 if (ret)
1148 goto remove_notif;
1149
1150 ret = iwl_wait_notification(&mvm->notif_wait, &wait_d3, HZ);
1151 WARN_ON_ONCE(ret);
1152 return ret;
1153
1154 remove_notif:
1155 iwl_remove_notification(&mvm->notif_wait, &wait_d3);
1156 return ret;
1157 }
1158
iwl_mvm_suspend(struct ieee80211_hw * hw,struct cfg80211_wowlan * wowlan)1159 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1160 {
1161 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1162 int ret;
1163
1164 /* make sure the d0i3 exit work is not pending */
1165 flush_work(&mvm->d0i3_exit_work);
1166
1167 ret = iwl_trans_suspend(mvm->trans);
1168 if (ret)
1169 return ret;
1170
1171 mvm->trans->wowlan_d0i3 = wowlan->any;
1172 if (mvm->trans->wowlan_d0i3) {
1173 /* 'any' trigger means d0i3 usage */
1174 if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND) {
1175 ret = iwl_mvm_enter_d0i3_sync(mvm);
1176
1177 if (ret)
1178 return ret;
1179 }
1180
1181 mutex_lock(&mvm->d0i3_suspend_mutex);
1182 __set_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1183 mutex_unlock(&mvm->d0i3_suspend_mutex);
1184
1185 iwl_trans_d3_suspend(mvm->trans, false);
1186
1187 return 0;
1188 }
1189
1190 return __iwl_mvm_suspend(hw, wowlan, false);
1191 }
1192
1193 /* converted data from the different status responses */
1194 struct iwl_wowlan_status_data {
1195 u16 pattern_number;
1196 u16 qos_seq_ctr[8];
1197 u32 wakeup_reasons;
1198 u32 wake_packet_length;
1199 u32 wake_packet_bufsize;
1200 const u8 *wake_packet;
1201 };
1202
iwl_mvm_report_wakeup_reasons(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_wowlan_status_data * status)1203 static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1204 struct ieee80211_vif *vif,
1205 struct iwl_wowlan_status_data *status)
1206 {
1207 struct sk_buff *pkt = NULL;
1208 struct cfg80211_wowlan_wakeup wakeup = {
1209 .pattern_idx = -1,
1210 };
1211 struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1212 u32 reasons = status->wakeup_reasons;
1213
1214 if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1215 wakeup_report = NULL;
1216 goto report;
1217 }
1218
1219 if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1220 wakeup.magic_pkt = true;
1221
1222 if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1223 wakeup.pattern_idx =
1224 status->pattern_number;
1225
1226 if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1227 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1228 wakeup.disconnect = true;
1229
1230 if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1231 wakeup.gtk_rekey_failure = true;
1232
1233 if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1234 wakeup.rfkill_release = true;
1235
1236 if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1237 wakeup.eap_identity_req = true;
1238
1239 if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1240 wakeup.four_way_handshake = true;
1241
1242 if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1243 wakeup.tcp_connlost = true;
1244
1245 if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1246 wakeup.tcp_nomoretokens = true;
1247
1248 if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1249 wakeup.tcp_match = true;
1250
1251 if (status->wake_packet_bufsize) {
1252 int pktsize = status->wake_packet_bufsize;
1253 int pktlen = status->wake_packet_length;
1254 const u8 *pktdata = status->wake_packet;
1255 struct ieee80211_hdr *hdr = (void *)pktdata;
1256 int truncated = pktlen - pktsize;
1257
1258 /* this would be a firmware bug */
1259 if (WARN_ON_ONCE(truncated < 0))
1260 truncated = 0;
1261
1262 if (ieee80211_is_data(hdr->frame_control)) {
1263 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1264 int ivlen = 0, icvlen = 4; /* also FCS */
1265
1266 pkt = alloc_skb(pktsize, GFP_KERNEL);
1267 if (!pkt)
1268 goto report;
1269
1270 memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1271 pktdata += hdrlen;
1272 pktsize -= hdrlen;
1273
1274 if (ieee80211_has_protected(hdr->frame_control)) {
1275 /*
1276 * This is unlocked and using gtk_i(c)vlen,
1277 * but since everything is under RTNL still
1278 * that's not really a problem - changing
1279 * it would be difficult.
1280 */
1281 if (is_multicast_ether_addr(hdr->addr1)) {
1282 ivlen = mvm->gtk_ivlen;
1283 icvlen += mvm->gtk_icvlen;
1284 } else {
1285 ivlen = mvm->ptk_ivlen;
1286 icvlen += mvm->ptk_icvlen;
1287 }
1288 }
1289
1290 /* if truncated, FCS/ICV is (partially) gone */
1291 if (truncated >= icvlen) {
1292 icvlen = 0;
1293 truncated -= icvlen;
1294 } else {
1295 icvlen -= truncated;
1296 truncated = 0;
1297 }
1298
1299 pktsize -= ivlen + icvlen;
1300 pktdata += ivlen;
1301
1302 memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1303
1304 if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1305 goto report;
1306 wakeup.packet = pkt->data;
1307 wakeup.packet_present_len = pkt->len;
1308 wakeup.packet_len = pkt->len - truncated;
1309 wakeup.packet_80211 = false;
1310 } else {
1311 int fcslen = 4;
1312
1313 if (truncated >= 4) {
1314 truncated -= 4;
1315 fcslen = 0;
1316 } else {
1317 fcslen -= truncated;
1318 truncated = 0;
1319 }
1320 pktsize -= fcslen;
1321 wakeup.packet = status->wake_packet;
1322 wakeup.packet_present_len = pktsize;
1323 wakeup.packet_len = pktlen - truncated;
1324 wakeup.packet_80211 = true;
1325 }
1326 }
1327
1328 report:
1329 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1330 kfree_skb(pkt);
1331 }
1332
iwl_mvm_aes_sc_to_seq(struct aes_sc * sc,struct ieee80211_key_seq * seq)1333 static void iwl_mvm_aes_sc_to_seq(struct aes_sc *sc,
1334 struct ieee80211_key_seq *seq)
1335 {
1336 u64 pn;
1337
1338 pn = le64_to_cpu(sc->pn);
1339 seq->ccmp.pn[0] = pn >> 40;
1340 seq->ccmp.pn[1] = pn >> 32;
1341 seq->ccmp.pn[2] = pn >> 24;
1342 seq->ccmp.pn[3] = pn >> 16;
1343 seq->ccmp.pn[4] = pn >> 8;
1344 seq->ccmp.pn[5] = pn;
1345 }
1346
iwl_mvm_tkip_sc_to_seq(struct tkip_sc * sc,struct ieee80211_key_seq * seq)1347 static void iwl_mvm_tkip_sc_to_seq(struct tkip_sc *sc,
1348 struct ieee80211_key_seq *seq)
1349 {
1350 seq->tkip.iv32 = le32_to_cpu(sc->iv32);
1351 seq->tkip.iv16 = le16_to_cpu(sc->iv16);
1352 }
1353
iwl_mvm_set_aes_rx_seq(struct aes_sc * scs,struct ieee80211_key_conf * key)1354 static void iwl_mvm_set_aes_rx_seq(struct aes_sc *scs,
1355 struct ieee80211_key_conf *key)
1356 {
1357 int tid;
1358
1359 BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1360
1361 for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1362 struct ieee80211_key_seq seq = {};
1363
1364 iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1365 ieee80211_set_key_rx_seq(key, tid, &seq);
1366 }
1367 }
1368
iwl_mvm_set_tkip_rx_seq(struct tkip_sc * scs,struct ieee80211_key_conf * key)1369 static void iwl_mvm_set_tkip_rx_seq(struct tkip_sc *scs,
1370 struct ieee80211_key_conf *key)
1371 {
1372 int tid;
1373
1374 BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1375
1376 for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1377 struct ieee80211_key_seq seq = {};
1378
1379 iwl_mvm_tkip_sc_to_seq(&scs[tid], &seq);
1380 ieee80211_set_key_rx_seq(key, tid, &seq);
1381 }
1382 }
1383
iwl_mvm_set_key_rx_seq(struct ieee80211_key_conf * key,struct iwl_wowlan_status * status)1384 static void iwl_mvm_set_key_rx_seq(struct ieee80211_key_conf *key,
1385 struct iwl_wowlan_status *status)
1386 {
1387 union iwl_all_tsc_rsc *rsc = &status->gtk.rsc.all_tsc_rsc;
1388
1389 switch (key->cipher) {
1390 case WLAN_CIPHER_SUITE_CCMP:
1391 iwl_mvm_set_aes_rx_seq(rsc->aes.multicast_rsc, key);
1392 break;
1393 case WLAN_CIPHER_SUITE_TKIP:
1394 iwl_mvm_set_tkip_rx_seq(rsc->tkip.multicast_rsc, key);
1395 break;
1396 default:
1397 WARN_ON(1);
1398 }
1399 }
1400
1401 struct iwl_mvm_d3_gtk_iter_data {
1402 struct iwl_wowlan_status *status;
1403 void *last_gtk;
1404 u32 cipher;
1405 bool find_phase, unhandled_cipher;
1406 int num_keys;
1407 };
1408
iwl_mvm_d3_update_gtks(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * key,void * _data)1409 static void iwl_mvm_d3_update_gtks(struct ieee80211_hw *hw,
1410 struct ieee80211_vif *vif,
1411 struct ieee80211_sta *sta,
1412 struct ieee80211_key_conf *key,
1413 void *_data)
1414 {
1415 struct iwl_mvm_d3_gtk_iter_data *data = _data;
1416
1417 if (data->unhandled_cipher)
1418 return;
1419
1420 switch (key->cipher) {
1421 case WLAN_CIPHER_SUITE_WEP40:
1422 case WLAN_CIPHER_SUITE_WEP104:
1423 /* ignore WEP completely, nothing to do */
1424 return;
1425 case WLAN_CIPHER_SUITE_CCMP:
1426 case WLAN_CIPHER_SUITE_TKIP:
1427 /* we support these */
1428 break;
1429 default:
1430 /* everything else (even CMAC for MFP) - disconnect from AP */
1431 data->unhandled_cipher = true;
1432 return;
1433 }
1434
1435 data->num_keys++;
1436
1437 /*
1438 * pairwise key - update sequence counters only;
1439 * note that this assumes no TDLS sessions are active
1440 */
1441 if (sta) {
1442 struct ieee80211_key_seq seq = {};
1443 union iwl_all_tsc_rsc *sc = &data->status->gtk.rsc.all_tsc_rsc;
1444
1445 if (data->find_phase)
1446 return;
1447
1448 switch (key->cipher) {
1449 case WLAN_CIPHER_SUITE_CCMP:
1450 iwl_mvm_set_aes_rx_seq(sc->aes.unicast_rsc, key);
1451 atomic64_set(&key->tx_pn, le64_to_cpu(sc->aes.tsc.pn));
1452 break;
1453 case WLAN_CIPHER_SUITE_TKIP:
1454 iwl_mvm_tkip_sc_to_seq(&sc->tkip.tsc, &seq);
1455 iwl_mvm_set_tkip_rx_seq(sc->tkip.unicast_rsc, key);
1456 ieee80211_set_key_tx_seq(key, &seq);
1457 break;
1458 }
1459
1460 /* that's it for this key */
1461 return;
1462 }
1463
1464 if (data->find_phase) {
1465 data->last_gtk = key;
1466 data->cipher = key->cipher;
1467 return;
1468 }
1469
1470 if (data->status->num_of_gtk_rekeys)
1471 ieee80211_remove_key(key);
1472 else if (data->last_gtk == key)
1473 iwl_mvm_set_key_rx_seq(key, data->status);
1474 }
1475
iwl_mvm_setup_connection_keep(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_wowlan_status * status)1476 static bool iwl_mvm_setup_connection_keep(struct iwl_mvm *mvm,
1477 struct ieee80211_vif *vif,
1478 struct iwl_wowlan_status *status)
1479 {
1480 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1481 struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1482 .status = status,
1483 };
1484 u32 disconnection_reasons =
1485 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1486 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1487
1488 if (!status || !vif->bss_conf.bssid)
1489 return false;
1490
1491 if (le32_to_cpu(status->wakeup_reasons) & disconnection_reasons)
1492 return false;
1493
1494 /* find last GTK that we used initially, if any */
1495 gtkdata.find_phase = true;
1496 ieee80211_iter_keys(mvm->hw, vif,
1497 iwl_mvm_d3_update_gtks, >kdata);
1498 /* not trying to keep connections with MFP/unhandled ciphers */
1499 if (gtkdata.unhandled_cipher)
1500 return false;
1501 if (!gtkdata.num_keys)
1502 goto out;
1503 if (!gtkdata.last_gtk)
1504 return false;
1505
1506 /*
1507 * invalidate all other GTKs that might still exist and update
1508 * the one that we used
1509 */
1510 gtkdata.find_phase = false;
1511 ieee80211_iter_keys(mvm->hw, vif,
1512 iwl_mvm_d3_update_gtks, >kdata);
1513
1514 if (status->num_of_gtk_rekeys) {
1515 struct ieee80211_key_conf *key;
1516 struct {
1517 struct ieee80211_key_conf conf;
1518 u8 key[32];
1519 } conf = {
1520 .conf.cipher = gtkdata.cipher,
1521 .conf.keyidx = status->gtk.key_index,
1522 };
1523
1524 switch (gtkdata.cipher) {
1525 case WLAN_CIPHER_SUITE_CCMP:
1526 conf.conf.keylen = WLAN_KEY_LEN_CCMP;
1527 memcpy(conf.conf.key, status->gtk.decrypt_key,
1528 WLAN_KEY_LEN_CCMP);
1529 break;
1530 case WLAN_CIPHER_SUITE_TKIP:
1531 conf.conf.keylen = WLAN_KEY_LEN_TKIP;
1532 memcpy(conf.conf.key, status->gtk.decrypt_key, 16);
1533 /* leave TX MIC key zeroed, we don't use it anyway */
1534 memcpy(conf.conf.key +
1535 NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY,
1536 status->gtk.tkip_mic_key, 8);
1537 break;
1538 }
1539
1540 key = ieee80211_gtk_rekey_add(vif, &conf.conf);
1541 if (IS_ERR(key))
1542 return false;
1543 iwl_mvm_set_key_rx_seq(key, status);
1544 }
1545
1546 if (status->num_of_gtk_rekeys) {
1547 __be64 replay_ctr =
1548 cpu_to_be64(le64_to_cpu(status->replay_ctr));
1549 ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
1550 (void *)&replay_ctr, GFP_KERNEL);
1551 }
1552
1553 out:
1554 mvmvif->seqno_valid = true;
1555 /* +0x10 because the set API expects next-to-use, not last-used */
1556 mvmvif->seqno = le16_to_cpu(status->non_qos_seq_ctr) + 0x10;
1557
1558 return true;
1559 }
1560
1561 static struct iwl_wowlan_status *
iwl_mvm_get_wakeup_status(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1562 iwl_mvm_get_wakeup_status(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1563 {
1564 u32 base = mvm->error_event_table;
1565 struct error_table_start {
1566 /* cf. struct iwl_error_event_table */
1567 u32 valid;
1568 u32 error_id;
1569 } err_info;
1570 struct iwl_host_cmd cmd = {
1571 .id = WOWLAN_GET_STATUSES,
1572 .flags = CMD_WANT_SKB,
1573 };
1574 struct iwl_wowlan_status *status, *fw_status;
1575 int ret, len, status_size;
1576
1577 iwl_trans_read_mem_bytes(mvm->trans, base,
1578 &err_info, sizeof(err_info));
1579
1580 if (err_info.valid) {
1581 IWL_INFO(mvm, "error table is valid (%d) with error (%d)\n",
1582 err_info.valid, err_info.error_id);
1583 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1584 struct cfg80211_wowlan_wakeup wakeup = {
1585 .rfkill_release = true,
1586 };
1587 ieee80211_report_wowlan_wakeup(vif, &wakeup,
1588 GFP_KERNEL);
1589 }
1590 return ERR_PTR(-EIO);
1591 }
1592
1593 /* only for tracing for now */
1594 ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, 0, 0, NULL);
1595 if (ret)
1596 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1597
1598 ret = iwl_mvm_send_cmd(mvm, &cmd);
1599 if (ret) {
1600 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1601 return ERR_PTR(ret);
1602 }
1603
1604 /* RF-kill already asserted again... */
1605 if (!cmd.resp_pkt) {
1606 fw_status = ERR_PTR(-ERFKILL);
1607 goto out_free_resp;
1608 }
1609
1610 status_size = sizeof(*fw_status);
1611
1612 len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1613 if (len < status_size) {
1614 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1615 fw_status = ERR_PTR(-EIO);
1616 goto out_free_resp;
1617 }
1618
1619 status = (void *)cmd.resp_pkt->data;
1620 if (len != (status_size +
1621 ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4))) {
1622 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1623 fw_status = ERR_PTR(-EIO);
1624 goto out_free_resp;
1625 }
1626
1627 fw_status = kmemdup(status, len, GFP_KERNEL);
1628
1629 out_free_resp:
1630 iwl_free_resp(&cmd);
1631 return fw_status;
1632 }
1633
1634 /* releases the MVM mutex */
iwl_mvm_query_wakeup_reasons(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1635 static bool iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1636 struct ieee80211_vif *vif)
1637 {
1638 struct iwl_wowlan_status_data status;
1639 struct iwl_wowlan_status *fw_status;
1640 int i;
1641 bool keep;
1642 struct ieee80211_sta *ap_sta;
1643 struct iwl_mvm_sta *mvm_ap_sta;
1644
1645 fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1646 if (IS_ERR_OR_NULL(fw_status))
1647 goto out_unlock;
1648
1649 status.pattern_number = le16_to_cpu(fw_status->pattern_number);
1650 for (i = 0; i < 8; i++)
1651 status.qos_seq_ctr[i] =
1652 le16_to_cpu(fw_status->qos_seq_ctr[i]);
1653 status.wakeup_reasons = le32_to_cpu(fw_status->wakeup_reasons);
1654 status.wake_packet_length =
1655 le32_to_cpu(fw_status->wake_packet_length);
1656 status.wake_packet_bufsize =
1657 le32_to_cpu(fw_status->wake_packet_bufsize);
1658 status.wake_packet = fw_status->wake_packet;
1659
1660 /* still at hard-coded place 0 for D3 image */
1661 ap_sta = rcu_dereference_protected(
1662 mvm->fw_id_to_mac_id[0],
1663 lockdep_is_held(&mvm->mutex));
1664 if (IS_ERR_OR_NULL(ap_sta))
1665 goto out_free;
1666
1667 mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1668 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1669 u16 seq = status.qos_seq_ctr[i];
1670 /* firmware stores last-used value, we store next value */
1671 seq += 0x10;
1672 mvm_ap_sta->tid_data[i].seq_number = seq;
1673 }
1674
1675 /* now we have all the data we need, unlock to avoid mac80211 issues */
1676 mutex_unlock(&mvm->mutex);
1677
1678 iwl_mvm_report_wakeup_reasons(mvm, vif, &status);
1679
1680 keep = iwl_mvm_setup_connection_keep(mvm, vif, fw_status);
1681
1682 kfree(fw_status);
1683 return keep;
1684
1685 out_free:
1686 kfree(fw_status);
1687 out_unlock:
1688 mutex_unlock(&mvm->mutex);
1689 return false;
1690 }
1691
1692 struct iwl_mvm_nd_query_results {
1693 u32 matched_profiles;
1694 struct iwl_scan_offload_profile_match matches[IWL_SCAN_MAX_PROFILES];
1695 };
1696
1697 static int
iwl_mvm_netdetect_query_results(struct iwl_mvm * mvm,struct iwl_mvm_nd_query_results * results)1698 iwl_mvm_netdetect_query_results(struct iwl_mvm *mvm,
1699 struct iwl_mvm_nd_query_results *results)
1700 {
1701 struct iwl_scan_offload_profiles_query *query;
1702 struct iwl_host_cmd cmd = {
1703 .id = SCAN_OFFLOAD_PROFILES_QUERY_CMD,
1704 .flags = CMD_WANT_SKB,
1705 };
1706 int ret, len;
1707
1708 ret = iwl_mvm_send_cmd(mvm, &cmd);
1709 if (ret) {
1710 IWL_ERR(mvm, "failed to query matched profiles (%d)\n", ret);
1711 return ret;
1712 }
1713
1714 /* RF-kill already asserted again... */
1715 if (!cmd.resp_pkt) {
1716 ret = -ERFKILL;
1717 goto out_free_resp;
1718 }
1719
1720 len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1721 if (len < sizeof(*query)) {
1722 IWL_ERR(mvm, "Invalid scan offload profiles query response!\n");
1723 ret = -EIO;
1724 goto out_free_resp;
1725 }
1726
1727 query = (void *)cmd.resp_pkt->data;
1728
1729 results->matched_profiles = le32_to_cpu(query->matched_profiles);
1730 memcpy(results->matches, query->matches, sizeof(results->matches));
1731
1732 #ifdef CONFIG_IWLWIFI_DEBUGFS
1733 mvm->last_netdetect_scans = le32_to_cpu(query->n_scans_done);
1734 #endif
1735
1736 out_free_resp:
1737 iwl_free_resp(&cmd);
1738 return ret;
1739 }
1740
iwl_mvm_query_netdetect_reasons(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1741 static void iwl_mvm_query_netdetect_reasons(struct iwl_mvm *mvm,
1742 struct ieee80211_vif *vif)
1743 {
1744 struct cfg80211_wowlan_nd_info *net_detect = NULL;
1745 struct cfg80211_wowlan_wakeup wakeup = {
1746 .pattern_idx = -1,
1747 };
1748 struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1749 struct iwl_mvm_nd_query_results query;
1750 struct iwl_wowlan_status *fw_status;
1751 unsigned long matched_profiles;
1752 u32 reasons = 0;
1753 int i, j, n_matches, ret;
1754
1755 fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1756 if (!IS_ERR_OR_NULL(fw_status)) {
1757 reasons = le32_to_cpu(fw_status->wakeup_reasons);
1758 kfree(fw_status);
1759 }
1760
1761 if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1762 wakeup.rfkill_release = true;
1763
1764 if (reasons != IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS)
1765 goto out;
1766
1767 ret = iwl_mvm_netdetect_query_results(mvm, &query);
1768 if (ret || !query.matched_profiles) {
1769 wakeup_report = NULL;
1770 goto out;
1771 }
1772
1773 matched_profiles = query.matched_profiles;
1774 if (mvm->n_nd_match_sets) {
1775 n_matches = hweight_long(matched_profiles);
1776 } else {
1777 IWL_ERR(mvm, "no net detect match information available\n");
1778 n_matches = 0;
1779 }
1780
1781 net_detect = kzalloc(sizeof(*net_detect) +
1782 (n_matches * sizeof(net_detect->matches[0])),
1783 GFP_KERNEL);
1784 if (!net_detect || !n_matches)
1785 goto out_report_nd;
1786
1787 for_each_set_bit(i, &matched_profiles, mvm->n_nd_match_sets) {
1788 struct iwl_scan_offload_profile_match *fw_match;
1789 struct cfg80211_wowlan_nd_match *match;
1790 int idx, n_channels = 0;
1791
1792 fw_match = &query.matches[i];
1793
1794 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN; j++)
1795 n_channels += hweight8(fw_match->matching_channels[j]);
1796
1797 match = kzalloc(sizeof(*match) +
1798 (n_channels * sizeof(*match->channels)),
1799 GFP_KERNEL);
1800 if (!match)
1801 goto out_report_nd;
1802
1803 net_detect->matches[net_detect->n_matches++] = match;
1804
1805 /* We inverted the order of the SSIDs in the scan
1806 * request, so invert the index here.
1807 */
1808 idx = mvm->n_nd_match_sets - i - 1;
1809 match->ssid.ssid_len = mvm->nd_match_sets[idx].ssid.ssid_len;
1810 memcpy(match->ssid.ssid, mvm->nd_match_sets[idx].ssid.ssid,
1811 match->ssid.ssid_len);
1812
1813 if (mvm->n_nd_channels < n_channels)
1814 continue;
1815
1816 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN * 8; j++)
1817 if (fw_match->matching_channels[j / 8] & (BIT(j % 8)))
1818 match->channels[match->n_channels++] =
1819 mvm->nd_channels[j]->center_freq;
1820 }
1821
1822 out_report_nd:
1823 wakeup.net_detect = net_detect;
1824 out:
1825 iwl_mvm_free_nd(mvm);
1826
1827 mutex_unlock(&mvm->mutex);
1828 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1829
1830 if (net_detect) {
1831 for (i = 0; i < net_detect->n_matches; i++)
1832 kfree(net_detect->matches[i]);
1833 kfree(net_detect);
1834 }
1835 }
1836
iwl_mvm_read_d3_sram(struct iwl_mvm * mvm)1837 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
1838 {
1839 #ifdef CONFIG_IWLWIFI_DEBUGFS
1840 const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
1841 u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
1842 u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1843
1844 if (!mvm->store_d3_resume_sram)
1845 return;
1846
1847 if (!mvm->d3_resume_sram) {
1848 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
1849 if (!mvm->d3_resume_sram)
1850 return;
1851 }
1852
1853 iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
1854 #endif
1855 }
1856
iwl_mvm_d3_disconnect_iter(void * data,u8 * mac,struct ieee80211_vif * vif)1857 static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac,
1858 struct ieee80211_vif *vif)
1859 {
1860 /* skip the one we keep connection on */
1861 if (data == vif)
1862 return;
1863
1864 if (vif->type == NL80211_IFTYPE_STATION)
1865 ieee80211_resume_disconnect(vif);
1866 }
1867
__iwl_mvm_resume(struct iwl_mvm * mvm,bool test)1868 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
1869 {
1870 struct ieee80211_vif *vif = NULL;
1871 int ret;
1872 enum iwl_d3_status d3_status;
1873 bool keep = false;
1874
1875 mutex_lock(&mvm->mutex);
1876
1877 /* get the BSS vif pointer again */
1878 vif = iwl_mvm_get_bss_vif(mvm);
1879 if (IS_ERR_OR_NULL(vif))
1880 goto err;
1881
1882 ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test);
1883 if (ret)
1884 goto err;
1885
1886 if (d3_status != IWL_D3_STATUS_ALIVE) {
1887 IWL_INFO(mvm, "Device was reset during suspend\n");
1888 goto err;
1889 }
1890
1891 /* query SRAM first in case we want event logging */
1892 iwl_mvm_read_d3_sram(mvm);
1893
1894 /*
1895 * Query the current location and source from the D3 firmware so we
1896 * can play it back when we re-intiailize the D0 firmware
1897 */
1898 iwl_mvm_update_changed_regdom(mvm);
1899
1900 if (mvm->net_detect) {
1901 iwl_mvm_query_netdetect_reasons(mvm, vif);
1902 /* has unlocked the mutex, so skip that */
1903 goto out;
1904 } else {
1905 keep = iwl_mvm_query_wakeup_reasons(mvm, vif);
1906 #ifdef CONFIG_IWLWIFI_DEBUGFS
1907 if (keep)
1908 mvm->keep_vif = vif;
1909 #endif
1910 /* has unlocked the mutex, so skip that */
1911 goto out_iterate;
1912 }
1913
1914 err:
1915 iwl_mvm_free_nd(mvm);
1916 mutex_unlock(&mvm->mutex);
1917
1918 out_iterate:
1919 if (!test)
1920 ieee80211_iterate_active_interfaces_rtnl(mvm->hw,
1921 IEEE80211_IFACE_ITER_NORMAL,
1922 iwl_mvm_d3_disconnect_iter, keep ? vif : NULL);
1923
1924 out:
1925 /* return 1 to reconfigure the device */
1926 set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1927 set_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status);
1928
1929 /* We always return 1, which causes mac80211 to do a reconfig
1930 * with IEEE80211_RECONFIG_TYPE_RESTART. This type of
1931 * reconfig calls iwl_mvm_restart_complete(), where we unref
1932 * the IWL_MVM_REF_UCODE_DOWN, so we need to take the
1933 * reference here.
1934 */
1935 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1936 return 1;
1937 }
1938
iwl_mvm_resume_d3(struct iwl_mvm * mvm)1939 static int iwl_mvm_resume_d3(struct iwl_mvm *mvm)
1940 {
1941 iwl_trans_resume(mvm->trans);
1942
1943 return __iwl_mvm_resume(mvm, false);
1944 }
1945
iwl_mvm_resume_d0i3(struct iwl_mvm * mvm)1946 static int iwl_mvm_resume_d0i3(struct iwl_mvm *mvm)
1947 {
1948 bool exit_now;
1949 enum iwl_d3_status d3_status;
1950
1951 iwl_trans_d3_resume(mvm->trans, &d3_status, false);
1952
1953 /*
1954 * make sure to clear D0I3_DEFER_WAKEUP before
1955 * calling iwl_trans_resume(), which might wait
1956 * for d0i3 exit completion.
1957 */
1958 mutex_lock(&mvm->d0i3_suspend_mutex);
1959 __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1960 exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
1961 &mvm->d0i3_suspend_flags);
1962 mutex_unlock(&mvm->d0i3_suspend_mutex);
1963 if (exit_now) {
1964 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
1965 _iwl_mvm_exit_d0i3(mvm);
1966 }
1967
1968 iwl_trans_resume(mvm->trans);
1969
1970 if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND) {
1971 int ret = iwl_mvm_exit_d0i3(mvm->hw->priv);
1972
1973 if (ret)
1974 return ret;
1975 /*
1976 * d0i3 exit will be deferred until reconfig_complete.
1977 * make sure there we are out of d0i3.
1978 */
1979 }
1980 return 0;
1981 }
1982
iwl_mvm_resume(struct ieee80211_hw * hw)1983 int iwl_mvm_resume(struct ieee80211_hw *hw)
1984 {
1985 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1986
1987 /* 'any' trigger means d0i3 was used */
1988 if (hw->wiphy->wowlan_config->any)
1989 return iwl_mvm_resume_d0i3(mvm);
1990 else
1991 return iwl_mvm_resume_d3(mvm);
1992 }
1993
iwl_mvm_set_wakeup(struct ieee80211_hw * hw,bool enabled)1994 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
1995 {
1996 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1997
1998 device_set_wakeup_enable(mvm->trans->dev, enabled);
1999 }
2000
2001 #ifdef CONFIG_IWLWIFI_DEBUGFS
iwl_mvm_d3_test_open(struct inode * inode,struct file * file)2002 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
2003 {
2004 struct iwl_mvm *mvm = inode->i_private;
2005 int err;
2006
2007 if (mvm->d3_test_active)
2008 return -EBUSY;
2009
2010 file->private_data = inode->i_private;
2011
2012 ieee80211_stop_queues(mvm->hw);
2013 synchronize_net();
2014
2015 /* start pseudo D3 */
2016 rtnl_lock();
2017 err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
2018 rtnl_unlock();
2019 if (err > 0)
2020 err = -EINVAL;
2021 if (err) {
2022 ieee80211_wake_queues(mvm->hw);
2023 return err;
2024 }
2025 mvm->d3_test_active = true;
2026 mvm->keep_vif = NULL;
2027 return 0;
2028 }
2029
iwl_mvm_d3_test_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)2030 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
2031 size_t count, loff_t *ppos)
2032 {
2033 struct iwl_mvm *mvm = file->private_data;
2034 u32 pme_asserted;
2035
2036 while (true) {
2037 /* read pme_ptr if available */
2038 if (mvm->d3_test_pme_ptr) {
2039 pme_asserted = iwl_trans_read_mem32(mvm->trans,
2040 mvm->d3_test_pme_ptr);
2041 if (pme_asserted)
2042 break;
2043 }
2044
2045 if (msleep_interruptible(100))
2046 break;
2047 }
2048
2049 return 0;
2050 }
2051
iwl_mvm_d3_test_disconn_work_iter(void * _data,u8 * mac,struct ieee80211_vif * vif)2052 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
2053 struct ieee80211_vif *vif)
2054 {
2055 /* skip the one we keep connection on */
2056 if (_data == vif)
2057 return;
2058
2059 if (vif->type == NL80211_IFTYPE_STATION)
2060 ieee80211_connection_loss(vif);
2061 }
2062
iwl_mvm_d3_test_release(struct inode * inode,struct file * file)2063 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
2064 {
2065 struct iwl_mvm *mvm = inode->i_private;
2066 int remaining_time = 10;
2067
2068 mvm->d3_test_active = false;
2069 rtnl_lock();
2070 __iwl_mvm_resume(mvm, true);
2071 rtnl_unlock();
2072 iwl_abort_notification_waits(&mvm->notif_wait);
2073 ieee80211_restart_hw(mvm->hw);
2074
2075 /* wait for restart and disconnect all interfaces */
2076 while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2077 remaining_time > 0) {
2078 remaining_time--;
2079 msleep(1000);
2080 }
2081
2082 if (remaining_time == 0)
2083 IWL_ERR(mvm, "Timed out waiting for HW restart to finish!\n");
2084
2085 ieee80211_iterate_active_interfaces_atomic(
2086 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2087 iwl_mvm_d3_test_disconn_work_iter, mvm->keep_vif);
2088
2089 ieee80211_wake_queues(mvm->hw);
2090
2091 return 0;
2092 }
2093
2094 const struct file_operations iwl_dbgfs_d3_test_ops = {
2095 .llseek = no_llseek,
2096 .open = iwl_mvm_d3_test_open,
2097 .read = iwl_mvm_d3_test_read,
2098 .release = iwl_mvm_d3_test_release,
2099 };
2100 #endif
2101