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iwlwifi: mvm: keep connection to AP after WoWLAN
[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 <linux/ip.h>
66 #include <linux/fs.h>
67 #include <net/cfg80211.h>
68 #include <net/ipv6.h>
69 #include <net/tcp.h>
70 #include <net/addrconf.h>
71 #include "iwl-modparams.h"
72 #include "fw-api.h"
73 #include "mvm.h"
74
75 void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw,
76 struct ieee80211_vif *vif,
77 struct cfg80211_gtk_rekey_data *data)
78 {
79 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
80 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
81
82 if (iwlwifi_mod_params.sw_crypto)
83 return;
84
85 mutex_lock(&mvm->mutex);
86
87 memcpy(mvmvif->rekey_data.kek, data->kek, NL80211_KEK_LEN);
88 memcpy(mvmvif->rekey_data.kck, data->kck, NL80211_KCK_LEN);
89 mvmvif->rekey_data.replay_ctr =
90 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
91 mvmvif->rekey_data.valid = true;
92
93 mutex_unlock(&mvm->mutex);
94 }
95
96 #if IS_ENABLED(CONFIG_IPV6)
97 void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
98 struct ieee80211_vif *vif,
99 struct inet6_dev *idev)
100 {
101 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
102 struct inet6_ifaddr *ifa;
103 int idx = 0;
104
105 read_lock_bh(&idev->lock);
106 list_for_each_entry(ifa, &idev->addr_list, if_list) {
107 mvmvif->target_ipv6_addrs[idx] = ifa->addr;
108 idx++;
109 if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_MAX)
110 break;
111 }
112 read_unlock_bh(&idev->lock);
113
114 mvmvif->num_target_ipv6_addrs = idx;
115 }
116 #endif
117
118 void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
119 struct ieee80211_vif *vif, int idx)
120 {
121 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
122
123 mvmvif->tx_key_idx = idx;
124 }
125
126 static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out)
127 {
128 int i;
129
130 for (i = 0; i < IWL_P1K_SIZE; i++)
131 out[i] = cpu_to_le16(p1k[i]);
132 }
133
134 struct wowlan_key_data {
135 struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc;
136 struct iwl_wowlan_tkip_params_cmd *tkip;
137 bool error, use_rsc_tsc, use_tkip;
138 int wep_key_idx;
139 };
140
141 static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
142 struct ieee80211_vif *vif,
143 struct ieee80211_sta *sta,
144 struct ieee80211_key_conf *key,
145 void *_data)
146 {
147 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
148 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
149 struct wowlan_key_data *data = _data;
150 struct aes_sc *aes_sc, *aes_tx_sc = NULL;
151 struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
152 struct iwl_p1k_cache *rx_p1ks;
153 u8 *rx_mic_key;
154 struct ieee80211_key_seq seq;
155 u32 cur_rx_iv32 = 0;
156 u16 p1k[IWL_P1K_SIZE];
157 int ret, i;
158
159 mutex_lock(&mvm->mutex);
160
161 switch (key->cipher) {
162 case WLAN_CIPHER_SUITE_WEP40:
163 case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */
164 struct {
165 struct iwl_mvm_wep_key_cmd wep_key_cmd;
166 struct iwl_mvm_wep_key wep_key;
167 } __packed wkc = {
168 .wep_key_cmd.mac_id_n_color =
169 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
170 mvmvif->color)),
171 .wep_key_cmd.num_keys = 1,
172 /* firmware sets STA_KEY_FLG_WEP_13BYTES */
173 .wep_key_cmd.decryption_type = STA_KEY_FLG_WEP,
174 .wep_key.key_index = key->keyidx,
175 .wep_key.key_size = key->keylen,
176 };
177
178 /*
179 * This will fail -- the key functions don't set support
180 * pairwise WEP keys. However, that's better than silently
181 * failing WoWLAN. Or maybe not?
182 */
183 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
184 break;
185
186 memcpy(&wkc.wep_key.key[3], key->key, key->keylen);
187 if (key->keyidx == mvmvif->tx_key_idx) {
188 /* TX key must be at offset 0 */
189 wkc.wep_key.key_offset = 0;
190 } else {
191 /* others start at 1 */
192 data->wep_key_idx++;
193 wkc.wep_key.key_offset = data->wep_key_idx;
194 }
195
196 ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, CMD_SYNC,
197 sizeof(wkc), &wkc);
198 data->error = ret != 0;
199
200 mvm->ptk_ivlen = key->iv_len;
201 mvm->ptk_icvlen = key->icv_len;
202 mvm->gtk_ivlen = key->iv_len;
203 mvm->gtk_icvlen = key->icv_len;
204
205 /* don't upload key again */
206 goto out_unlock;
207 }
208 default:
209 data->error = true;
210 goto out_unlock;
211 case WLAN_CIPHER_SUITE_AES_CMAC:
212 /*
213 * Ignore CMAC keys -- the WoWLAN firmware doesn't support them
214 * but we also shouldn't abort suspend due to that. It does have
215 * support for the IGTK key renewal, but doesn't really use the
216 * IGTK for anything. This means we could spuriously wake up or
217 * be deauthenticated, but that was considered acceptable.
218 */
219 goto out_unlock;
220 case WLAN_CIPHER_SUITE_TKIP:
221 if (sta) {
222 tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
223 tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
224
225 rx_p1ks = data->tkip->rx_uni;
226
227 ieee80211_get_key_tx_seq(key, &seq);
228 tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
229 tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
230
231 ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
232 iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k);
233
234 memcpy(data->tkip->mic_keys.tx,
235 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
236 IWL_MIC_KEY_SIZE);
237
238 rx_mic_key = data->tkip->mic_keys.rx_unicast;
239 } else {
240 tkip_sc =
241 data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
242 rx_p1ks = data->tkip->rx_multi;
243 rx_mic_key = data->tkip->mic_keys.rx_mcast;
244 }
245
246 /*
247 * For non-QoS this relies on the fact that both the uCode and
248 * mac80211 use TID 0 (as they need to to avoid replay attacks)
249 * for checking the IV in the frames.
250 */
251 for (i = 0; i < IWL_NUM_RSC; i++) {
252 ieee80211_get_key_rx_seq(key, i, &seq);
253 tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
254 tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
255 /* wrapping isn't allowed, AP must rekey */
256 if (seq.tkip.iv32 > cur_rx_iv32)
257 cur_rx_iv32 = seq.tkip.iv32;
258 }
259
260 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
261 cur_rx_iv32, p1k);
262 iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k);
263 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
264 cur_rx_iv32 + 1, p1k);
265 iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k);
266
267 memcpy(rx_mic_key,
268 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
269 IWL_MIC_KEY_SIZE);
270
271 data->use_tkip = true;
272 data->use_rsc_tsc = true;
273 break;
274 case WLAN_CIPHER_SUITE_CCMP:
275 if (sta) {
276 u8 *pn = seq.ccmp.pn;
277
278 aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
279 aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
280
281 ieee80211_get_key_tx_seq(key, &seq);
282 aes_tx_sc->pn = cpu_to_le64((u64)pn[5] |
283 ((u64)pn[4] << 8) |
284 ((u64)pn[3] << 16) |
285 ((u64)pn[2] << 24) |
286 ((u64)pn[1] << 32) |
287 ((u64)pn[0] << 40));
288 } else {
289 aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
290 }
291
292 /*
293 * For non-QoS this relies on the fact that both the uCode and
294 * mac80211 use TID 0 for checking the IV in the frames.
295 */
296 for (i = 0; i < IWL_NUM_RSC; i++) {
297 u8 *pn = seq.ccmp.pn;
298
299 ieee80211_get_key_rx_seq(key, i, &seq);
300 aes_sc->pn = cpu_to_le64((u64)pn[5] |
301 ((u64)pn[4] << 8) |
302 ((u64)pn[3] << 16) |
303 ((u64)pn[2] << 24) |
304 ((u64)pn[1] << 32) |
305 ((u64)pn[0] << 40));
306 }
307 data->use_rsc_tsc = true;
308 break;
309 }
310
311 /*
312 * The D3 firmware hardcodes the key offset 0 as the key it uses
313 * to transmit packets to the AP, i.e. the PTK.
314 */
315 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
316 key->hw_key_idx = 0;
317 mvm->ptk_ivlen = key->iv_len;
318 mvm->ptk_icvlen = key->icv_len;
319 } else {
320 /*
321 * firmware only supports TSC/RSC for a single key,
322 * so if there are multiple keep overwriting them
323 * with new ones -- this relies on mac80211 doing
324 * list_add_tail().
325 */
326 key->hw_key_idx = 1;
327 mvm->gtk_ivlen = key->iv_len;
328 mvm->gtk_icvlen = key->icv_len;
329 }
330
331 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, true);
332 data->error = ret != 0;
333 out_unlock:
334 mutex_unlock(&mvm->mutex);
335 }
336
337 static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
338 struct cfg80211_wowlan *wowlan)
339 {
340 struct iwl_wowlan_patterns_cmd *pattern_cmd;
341 struct iwl_host_cmd cmd = {
342 .id = WOWLAN_PATTERNS,
343 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
344 .flags = CMD_SYNC,
345 };
346 int i, err;
347
348 if (!wowlan->n_patterns)
349 return 0;
350
351 cmd.len[0] = sizeof(*pattern_cmd) +
352 wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern);
353
354 pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
355 if (!pattern_cmd)
356 return -ENOMEM;
357
358 pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
359
360 for (i = 0; i < wowlan->n_patterns; i++) {
361 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
362
363 memcpy(&pattern_cmd->patterns[i].mask,
364 wowlan->patterns[i].mask, mask_len);
365 memcpy(&pattern_cmd->patterns[i].pattern,
366 wowlan->patterns[i].pattern,
367 wowlan->patterns[i].pattern_len);
368 pattern_cmd->patterns[i].mask_size = mask_len;
369 pattern_cmd->patterns[i].pattern_size =
370 wowlan->patterns[i].pattern_len;
371 }
372
373 cmd.data[0] = pattern_cmd;
374 err = iwl_mvm_send_cmd(mvm, &cmd);
375 kfree(pattern_cmd);
376 return err;
377 }
378
379 static int iwl_mvm_send_proto_offload(struct iwl_mvm *mvm,
380 struct ieee80211_vif *vif)
381 {
382 union {
383 struct iwl_proto_offload_cmd_v1 v1;
384 struct iwl_proto_offload_cmd_v2 v2;
385 struct iwl_proto_offload_cmd_v3_small v3s;
386 struct iwl_proto_offload_cmd_v3_large v3l;
387 } cmd = {};
388 struct iwl_host_cmd hcmd = {
389 .id = PROT_OFFLOAD_CONFIG_CMD,
390 .flags = CMD_SYNC,
391 .data[0] = &cmd,
392 .dataflags[0] = IWL_HCMD_DFL_DUP,
393 };
394 struct iwl_proto_offload_cmd_common *common;
395 u32 enabled = 0, size;
396 u32 capa_flags = mvm->fw->ucode_capa.flags;
397 #if IS_ENABLED(CONFIG_IPV6)
398 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
399 int i;
400
401 if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL ||
402 capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_LARGE) {
403 struct iwl_ns_config *nsc;
404 struct iwl_targ_addr *addrs;
405 int n_nsc, n_addrs;
406 int c;
407
408 if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL) {
409 nsc = cmd.v3s.ns_config;
410 n_nsc = IWL_PROTO_OFFLOAD_NUM_NS_CONFIG_V3S;
411 addrs = cmd.v3s.targ_addrs;
412 n_addrs = IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V3S;
413 } else {
414 nsc = cmd.v3l.ns_config;
415 n_nsc = IWL_PROTO_OFFLOAD_NUM_NS_CONFIG_V3L;
416 addrs = cmd.v3l.targ_addrs;
417 n_addrs = IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V3L;
418 }
419
420 if (mvmvif->num_target_ipv6_addrs)
421 enabled |= IWL_D3_PROTO_OFFLOAD_NS;
422
423 /*
424 * For each address we have (and that will fit) fill a target
425 * address struct and combine for NS offload structs with the
426 * solicited node addresses.
427 */
428 for (i = 0, c = 0;
429 i < mvmvif->num_target_ipv6_addrs &&
430 i < n_addrs && c < n_nsc; i++) {
431 struct in6_addr solicited_addr;
432 int j;
433
434 addrconf_addr_solict_mult(&mvmvif->target_ipv6_addrs[i],
435 &solicited_addr);
436 for (j = 0; j < c; j++)
437 if (ipv6_addr_cmp(&nsc[j].dest_ipv6_addr,
438 &solicited_addr) == 0)
439 break;
440 if (j == c)
441 c++;
442 addrs[i].addr = mvmvif->target_ipv6_addrs[i];
443 addrs[i].config_num = cpu_to_le32(j);
444 nsc[j].dest_ipv6_addr = solicited_addr;
445 memcpy(nsc[j].target_mac_addr, vif->addr, ETH_ALEN);
446 }
447
448 if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL)
449 cmd.v3s.num_valid_ipv6_addrs = cpu_to_le32(i);
450 else
451 cmd.v3l.num_valid_ipv6_addrs = cpu_to_le32(i);
452 } else if (capa_flags & IWL_UCODE_TLV_FLAGS_D3_6_IPV6_ADDRS) {
453 if (mvmvif->num_target_ipv6_addrs) {
454 enabled |= IWL_D3_PROTO_OFFLOAD_NS;
455 memcpy(cmd.v2.ndp_mac_addr, vif->addr, ETH_ALEN);
456 }
457
458 BUILD_BUG_ON(sizeof(cmd.v2.target_ipv6_addr[0]) !=
459 sizeof(mvmvif->target_ipv6_addrs[0]));
460
461 for (i = 0; i < min(mvmvif->num_target_ipv6_addrs,
462 IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V2); i++)
463 memcpy(cmd.v2.target_ipv6_addr[i],
464 &mvmvif->target_ipv6_addrs[i],
465 sizeof(cmd.v2.target_ipv6_addr[i]));
466 } else {
467 if (mvmvif->num_target_ipv6_addrs) {
468 enabled |= IWL_D3_PROTO_OFFLOAD_NS;
469 memcpy(cmd.v1.ndp_mac_addr, vif->addr, ETH_ALEN);
470 }
471
472 BUILD_BUG_ON(sizeof(cmd.v1.target_ipv6_addr[0]) !=
473 sizeof(mvmvif->target_ipv6_addrs[0]));
474
475 for (i = 0; i < min(mvmvif->num_target_ipv6_addrs,
476 IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V1); i++)
477 memcpy(cmd.v1.target_ipv6_addr[i],
478 &mvmvif->target_ipv6_addrs[i],
479 sizeof(cmd.v1.target_ipv6_addr[i]));
480 }
481 #endif
482
483 if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL) {
484 common = &cmd.v3s.common;
485 size = sizeof(cmd.v3s);
486 } else if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_LARGE) {
487 common = &cmd.v3l.common;
488 size = sizeof(cmd.v3l);
489 } else if (capa_flags & IWL_UCODE_TLV_FLAGS_D3_6_IPV6_ADDRS) {
490 common = &cmd.v2.common;
491 size = sizeof(cmd.v2);
492 } else {
493 common = &cmd.v1.common;
494 size = sizeof(cmd.v1);
495 }
496
497 if (vif->bss_conf.arp_addr_cnt) {
498 enabled |= IWL_D3_PROTO_OFFLOAD_ARP;
499 common->host_ipv4_addr = vif->bss_conf.arp_addr_list[0];
500 memcpy(common->arp_mac_addr, vif->addr, ETH_ALEN);
501 }
502
503 if (!enabled)
504 return 0;
505
506 common->enabled = cpu_to_le32(enabled);
507
508 hcmd.len[0] = size;
509 return iwl_mvm_send_cmd(mvm, &hcmd);
510 }
511
512 enum iwl_mvm_tcp_packet_type {
513 MVM_TCP_TX_SYN,
514 MVM_TCP_RX_SYNACK,
515 MVM_TCP_TX_DATA,
516 MVM_TCP_RX_ACK,
517 MVM_TCP_RX_WAKE,
518 MVM_TCP_TX_FIN,
519 };
520
521 static __le16 pseudo_hdr_check(int len, __be32 saddr, __be32 daddr)
522 {
523 __sum16 check = tcp_v4_check(len, saddr, daddr, 0);
524 return cpu_to_le16(be16_to_cpu((__force __be16)check));
525 }
526
527 static void iwl_mvm_build_tcp_packet(struct ieee80211_vif *vif,
528 struct cfg80211_wowlan_tcp *tcp,
529 void *_pkt, u8 *mask,
530 __le16 *pseudo_hdr_csum,
531 enum iwl_mvm_tcp_packet_type ptype)
532 {
533 struct {
534 struct ethhdr eth;
535 struct iphdr ip;
536 struct tcphdr tcp;
537 u8 data[];
538 } __packed *pkt = _pkt;
539 u16 ip_tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
540 int i;
541
542 pkt->eth.h_proto = cpu_to_be16(ETH_P_IP),
543 pkt->ip.version = 4;
544 pkt->ip.ihl = 5;
545 pkt->ip.protocol = IPPROTO_TCP;
546
547 switch (ptype) {
548 case MVM_TCP_TX_SYN:
549 case MVM_TCP_TX_DATA:
550 case MVM_TCP_TX_FIN:
551 memcpy(pkt->eth.h_dest, tcp->dst_mac, ETH_ALEN);
552 memcpy(pkt->eth.h_source, vif->addr, ETH_ALEN);
553 pkt->ip.ttl = 128;
554 pkt->ip.saddr = tcp->src;
555 pkt->ip.daddr = tcp->dst;
556 pkt->tcp.source = cpu_to_be16(tcp->src_port);
557 pkt->tcp.dest = cpu_to_be16(tcp->dst_port);
558 /* overwritten for TX SYN later */
559 pkt->tcp.doff = sizeof(struct tcphdr) / 4;
560 pkt->tcp.window = cpu_to_be16(65000);
561 break;
562 case MVM_TCP_RX_SYNACK:
563 case MVM_TCP_RX_ACK:
564 case MVM_TCP_RX_WAKE:
565 memcpy(pkt->eth.h_dest, vif->addr, ETH_ALEN);
566 memcpy(pkt->eth.h_source, tcp->dst_mac, ETH_ALEN);
567 pkt->ip.saddr = tcp->dst;
568 pkt->ip.daddr = tcp->src;
569 pkt->tcp.source = cpu_to_be16(tcp->dst_port);
570 pkt->tcp.dest = cpu_to_be16(tcp->src_port);
571 break;
572 default:
573 WARN_ON(1);
574 return;
575 }
576
577 switch (ptype) {
578 case MVM_TCP_TX_SYN:
579 /* firmware assumes 8 option bytes - 8 NOPs for now */
580 memset(pkt->data, 0x01, 8);
581 ip_tot_len += 8;
582 pkt->tcp.doff = (sizeof(struct tcphdr) + 8) / 4;
583 pkt->tcp.syn = 1;
584 break;
585 case MVM_TCP_TX_DATA:
586 ip_tot_len += tcp->payload_len;
587 memcpy(pkt->data, tcp->payload, tcp->payload_len);
588 pkt->tcp.psh = 1;
589 pkt->tcp.ack = 1;
590 break;
591 case MVM_TCP_TX_FIN:
592 pkt->tcp.fin = 1;
593 pkt->tcp.ack = 1;
594 break;
595 case MVM_TCP_RX_SYNACK:
596 pkt->tcp.syn = 1;
597 pkt->tcp.ack = 1;
598 break;
599 case MVM_TCP_RX_ACK:
600 pkt->tcp.ack = 1;
601 break;
602 case MVM_TCP_RX_WAKE:
603 ip_tot_len += tcp->wake_len;
604 pkt->tcp.psh = 1;
605 pkt->tcp.ack = 1;
606 memcpy(pkt->data, tcp->wake_data, tcp->wake_len);
607 break;
608 }
609
610 switch (ptype) {
611 case MVM_TCP_TX_SYN:
612 case MVM_TCP_TX_DATA:
613 case MVM_TCP_TX_FIN:
614 pkt->ip.tot_len = cpu_to_be16(ip_tot_len);
615 pkt->ip.check = ip_fast_csum(&pkt->ip, pkt->ip.ihl);
616 break;
617 case MVM_TCP_RX_WAKE:
618 for (i = 0; i < DIV_ROUND_UP(tcp->wake_len, 8); i++) {
619 u8 tmp = tcp->wake_mask[i];
620 mask[i + 6] |= tmp << 6;
621 if (i + 1 < DIV_ROUND_UP(tcp->wake_len, 8))
622 mask[i + 7] = tmp >> 2;
623 }
624 /* fall through for ethernet/IP/TCP headers mask */
625 case MVM_TCP_RX_SYNACK:
626 case MVM_TCP_RX_ACK:
627 mask[0] = 0xff; /* match ethernet */
628 /*
629 * match ethernet, ip.version, ip.ihl
630 * the ip.ihl half byte is really masked out by firmware
631 */
632 mask[1] = 0x7f;
633 mask[2] = 0x80; /* match ip.protocol */
634 mask[3] = 0xfc; /* match ip.saddr, ip.daddr */
635 mask[4] = 0x3f; /* match ip.daddr, tcp.source, tcp.dest */
636 mask[5] = 0x80; /* match tcp flags */
637 /* leave rest (0 or set for MVM_TCP_RX_WAKE) */
638 break;
639 };
640
641 *pseudo_hdr_csum = pseudo_hdr_check(ip_tot_len - sizeof(struct iphdr),
642 pkt->ip.saddr, pkt->ip.daddr);
643 }
644
645 static int iwl_mvm_send_remote_wake_cfg(struct iwl_mvm *mvm,
646 struct ieee80211_vif *vif,
647 struct cfg80211_wowlan_tcp *tcp)
648 {
649 struct iwl_wowlan_remote_wake_config *cfg;
650 struct iwl_host_cmd cmd = {
651 .id = REMOTE_WAKE_CONFIG_CMD,
652 .len = { sizeof(*cfg), },
653 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
654 .flags = CMD_SYNC,
655 };
656 int ret;
657
658 if (!tcp)
659 return 0;
660
661 cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
662 if (!cfg)
663 return -ENOMEM;
664 cmd.data[0] = cfg;
665
666 cfg->max_syn_retries = 10;
667 cfg->max_data_retries = 10;
668 cfg->tcp_syn_ack_timeout = 1; /* seconds */
669 cfg->tcp_ack_timeout = 1; /* seconds */
670
671 /* SYN (TX) */
672 iwl_mvm_build_tcp_packet(
673 vif, tcp, cfg->syn_tx.data, NULL,
674 &cfg->syn_tx.info.tcp_pseudo_header_checksum,
675 MVM_TCP_TX_SYN);
676 cfg->syn_tx.info.tcp_payload_length = 0;
677
678 /* SYN/ACK (RX) */
679 iwl_mvm_build_tcp_packet(
680 vif, tcp, cfg->synack_rx.data, cfg->synack_rx.rx_mask,
681 &cfg->synack_rx.info.tcp_pseudo_header_checksum,
682 MVM_TCP_RX_SYNACK);
683 cfg->synack_rx.info.tcp_payload_length = 0;
684
685 /* KEEPALIVE/ACK (TX) */
686 iwl_mvm_build_tcp_packet(
687 vif, tcp, cfg->keepalive_tx.data, NULL,
688 &cfg->keepalive_tx.info.tcp_pseudo_header_checksum,
689 MVM_TCP_TX_DATA);
690 cfg->keepalive_tx.info.tcp_payload_length =
691 cpu_to_le16(tcp->payload_len);
692 cfg->sequence_number_offset = tcp->payload_seq.offset;
693 /* length must be 0..4, the field is little endian */
694 cfg->sequence_number_length = tcp->payload_seq.len;
695 cfg->initial_sequence_number = cpu_to_le32(tcp->payload_seq.start);
696 cfg->keepalive_interval = cpu_to_le16(tcp->data_interval);
697 if (tcp->payload_tok.len) {
698 cfg->token_offset = tcp->payload_tok.offset;
699 cfg->token_length = tcp->payload_tok.len;
700 cfg->num_tokens =
701 cpu_to_le16(tcp->tokens_size % tcp->payload_tok.len);
702 memcpy(cfg->tokens, tcp->payload_tok.token_stream,
703 tcp->tokens_size);
704 } else {
705 /* set tokens to max value to almost never run out */
706 cfg->num_tokens = cpu_to_le16(65535);
707 }
708
709 /* ACK (RX) */
710 iwl_mvm_build_tcp_packet(
711 vif, tcp, cfg->keepalive_ack_rx.data,
712 cfg->keepalive_ack_rx.rx_mask,
713 &cfg->keepalive_ack_rx.info.tcp_pseudo_header_checksum,
714 MVM_TCP_RX_ACK);
715 cfg->keepalive_ack_rx.info.tcp_payload_length = 0;
716
717 /* WAKEUP (RX) */
718 iwl_mvm_build_tcp_packet(
719 vif, tcp, cfg->wake_rx.data, cfg->wake_rx.rx_mask,
720 &cfg->wake_rx.info.tcp_pseudo_header_checksum,
721 MVM_TCP_RX_WAKE);
722 cfg->wake_rx.info.tcp_payload_length =
723 cpu_to_le16(tcp->wake_len);
724
725 /* FIN */
726 iwl_mvm_build_tcp_packet(
727 vif, tcp, cfg->fin_tx.data, NULL,
728 &cfg->fin_tx.info.tcp_pseudo_header_checksum,
729 MVM_TCP_TX_FIN);
730 cfg->fin_tx.info.tcp_payload_length = 0;
731
732 ret = iwl_mvm_send_cmd(mvm, &cmd);
733 kfree(cfg);
734
735 return ret;
736 }
737
738 struct iwl_d3_iter_data {
739 struct iwl_mvm *mvm;
740 struct ieee80211_vif *vif;
741 bool error;
742 };
743
744 static void iwl_mvm_d3_iface_iterator(void *_data, u8 *mac,
745 struct ieee80211_vif *vif)
746 {
747 struct iwl_d3_iter_data *data = _data;
748 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
749
750 if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
751 return;
752
753 if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
754 return;
755
756 if (data->vif) {
757 IWL_ERR(data->mvm, "More than one managed interface active!\n");
758 data->error = true;
759 return;
760 }
761
762 data->vif = vif;
763 }
764
765 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
766 struct ieee80211_sta *ap_sta)
767 {
768 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
769 struct ieee80211_chanctx_conf *ctx;
770 u8 chains_static, chains_dynamic;
771 struct cfg80211_chan_def chandef;
772 int ret, i;
773 struct iwl_binding_cmd binding_cmd = {};
774 struct iwl_time_quota_cmd quota_cmd = {};
775 u32 status;
776
777 /* add back the PHY */
778 if (WARN_ON(!mvmvif->phy_ctxt))
779 return -EINVAL;
780
781 rcu_read_lock();
782 ctx = rcu_dereference(vif->chanctx_conf);
783 if (WARN_ON(!ctx)) {
784 rcu_read_unlock();
785 return -EINVAL;
786 }
787 chandef = ctx->def;
788 chains_static = ctx->rx_chains_static;
789 chains_dynamic = ctx->rx_chains_dynamic;
790 rcu_read_unlock();
791
792 ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
793 chains_static, chains_dynamic);
794 if (ret)
795 return ret;
796
797 /* add back the MAC */
798 mvmvif->uploaded = false;
799
800 if (WARN_ON(!vif->bss_conf.assoc))
801 return -EINVAL;
802 /* hack */
803 vif->bss_conf.assoc = false;
804 ret = iwl_mvm_mac_ctxt_add(mvm, vif);
805 vif->bss_conf.assoc = true;
806 if (ret)
807 return ret;
808
809 /* add back binding - XXX refactor? */
810 binding_cmd.id_and_color =
811 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
812 mvmvif->phy_ctxt->color));
813 binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
814 binding_cmd.phy =
815 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
816 mvmvif->phy_ctxt->color));
817 binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
818 mvmvif->color));
819 for (i = 1; i < MAX_MACS_IN_BINDING; i++)
820 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
821
822 status = 0;
823 ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
824 sizeof(binding_cmd), &binding_cmd,
825 &status);
826 if (ret) {
827 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
828 return ret;
829 }
830
831 if (status) {
832 IWL_ERR(mvm, "Binding command failed: %u\n", status);
833 return -EIO;
834 }
835
836 ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false);
837 if (ret)
838 return ret;
839 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
840
841 ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
842 if (ret)
843 return ret;
844
845 /* and some quota */
846 quota_cmd.quotas[0].id_and_color =
847 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
848 mvmvif->phy_ctxt->color));
849 quota_cmd.quotas[0].quota = cpu_to_le32(100);
850 quota_cmd.quotas[0].max_duration = cpu_to_le32(1000);
851
852 for (i = 1; i < MAX_BINDINGS; i++)
853 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
854
855 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, CMD_SYNC,
856 sizeof(quota_cmd), &quota_cmd);
857 if (ret)
858 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
859
860 return 0;
861 }
862
863 static int iwl_mvm_get_last_nonqos_seq(struct iwl_mvm *mvm,
864 struct ieee80211_vif *vif)
865 {
866 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
867 struct iwl_nonqos_seq_query_cmd query_cmd = {
868 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_GET),
869 .mac_id_n_color =
870 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
871 mvmvif->color)),
872 };
873 struct iwl_host_cmd cmd = {
874 .id = NON_QOS_TX_COUNTER_CMD,
875 .flags = CMD_SYNC | CMD_WANT_SKB,
876 };
877 int err;
878 u32 size;
879
880 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_D3_CONTINUITY_API) {
881 cmd.data[0] = &query_cmd;
882 cmd.len[0] = sizeof(query_cmd);
883 }
884
885 err = iwl_mvm_send_cmd(mvm, &cmd);
886 if (err)
887 return err;
888
889 size = le32_to_cpu(cmd.resp_pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
890 size -= sizeof(cmd.resp_pkt->hdr);
891 if (size < sizeof(__le16)) {
892 err = -EINVAL;
893 } else {
894 err = le16_to_cpup((__le16 *)cmd.resp_pkt->data);
895 /* new API returns next, not last-used seqno */
896 if (mvm->fw->ucode_capa.flags &
897 IWL_UCODE_TLV_FLAGS_D3_CONTINUITY_API)
898 err -= 0x10;
899 }
900
901 iwl_free_resp(&cmd);
902 return err;
903 }
904
905 void iwl_mvm_set_last_nonqos_seq(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
906 {
907 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
908 struct iwl_nonqos_seq_query_cmd query_cmd = {
909 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_SET),
910 .mac_id_n_color =
911 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
912 mvmvif->color)),
913 .value = cpu_to_le16(mvmvif->seqno),
914 };
915
916 /* return if called during restart, not resume from D3 */
917 if (!mvmvif->seqno_valid)
918 return;
919
920 mvmvif->seqno_valid = false;
921
922 if (!(mvm->fw->ucode_capa.flags &
923 IWL_UCODE_TLV_FLAGS_D3_CONTINUITY_API))
924 return;
925
926 if (iwl_mvm_send_cmd_pdu(mvm, NON_QOS_TX_COUNTER_CMD, CMD_SYNC,
927 sizeof(query_cmd), &query_cmd))
928 IWL_ERR(mvm, "failed to set non-QoS seqno\n");
929 }
930
931 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
932 struct cfg80211_wowlan *wowlan,
933 bool test)
934 {
935 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
936 struct iwl_d3_iter_data suspend_iter_data = {
937 .mvm = mvm,
938 };
939 struct ieee80211_vif *vif;
940 struct iwl_mvm_vif *mvmvif;
941 struct ieee80211_sta *ap_sta;
942 struct iwl_mvm_sta *mvm_ap_sta;
943 struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
944 struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
945 struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
946 struct iwl_d3_manager_config d3_cfg_cmd_data = {
947 /*
948 * Program the minimum sleep time to 10 seconds, as many
949 * platforms have issues processing a wakeup signal while
950 * still being in the process of suspending.
951 */
952 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
953 };
954 struct iwl_host_cmd d3_cfg_cmd = {
955 .id = D3_CONFIG_CMD,
956 .flags = CMD_SYNC | CMD_WANT_SKB,
957 .data[0] = &d3_cfg_cmd_data,
958 .len[0] = sizeof(d3_cfg_cmd_data),
959 };
960 struct wowlan_key_data key_data = {
961 .use_rsc_tsc = false,
962 .tkip = &tkip_cmd,
963 .use_tkip = false,
964 };
965 int ret, i;
966 int len __maybe_unused;
967 u8 old_aux_sta_id, old_ap_sta_id = IWL_MVM_STATION_COUNT;
968
969 if (!wowlan) {
970 /*
971 * mac80211 shouldn't get here, but for D3 test
972 * it doesn't warrant a warning
973 */
974 WARN_ON(!test);
975 return -EINVAL;
976 }
977
978 key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
979 if (!key_data.rsc_tsc)
980 return -ENOMEM;
981
982 mutex_lock(&mvm->mutex);
983
984 old_aux_sta_id = mvm->aux_sta.sta_id;
985
986 /* see if there's only a single BSS vif and it's associated */
987 ieee80211_iterate_active_interfaces_atomic(
988 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
989 iwl_mvm_d3_iface_iterator, &suspend_iter_data);
990
991 if (suspend_iter_data.error || !suspend_iter_data.vif) {
992 ret = 1;
993 goto out_noreset;
994 }
995
996 vif = suspend_iter_data.vif;
997 mvmvif = iwl_mvm_vif_from_mac80211(vif);
998
999 ap_sta = rcu_dereference_protected(
1000 mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
1001 lockdep_is_held(&mvm->mutex));
1002 if (IS_ERR_OR_NULL(ap_sta)) {
1003 ret = -EINVAL;
1004 goto out_noreset;
1005 }
1006
1007 mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
1008
1009 /* TODO: wowlan_config_cmd.wowlan_ba_teardown_tids */
1010
1011 wowlan_config_cmd.is_11n_connection = ap_sta->ht_cap.ht_supported;
1012
1013 /* Query the last used seqno and set it */
1014 ret = iwl_mvm_get_last_nonqos_seq(mvm, vif);
1015 if (ret < 0)
1016 goto out_noreset;
1017 wowlan_config_cmd.non_qos_seq = cpu_to_le16(ret);
1018
1019 /*
1020 * For QoS counters, we store the one to use next, so subtract 0x10
1021 * since the uCode will add 0x10 *before* using the value while we
1022 * increment after using the value (i.e. store the next value to use).
1023 */
1024 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1025 u16 seq = mvm_ap_sta->tid_data[i].seq_number;
1026 seq -= 0x10;
1027 wowlan_config_cmd.qos_seq[i] = cpu_to_le16(seq);
1028 }
1029
1030 if (wowlan->disconnect)
1031 wowlan_config_cmd.wakeup_filter |=
1032 cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
1033 IWL_WOWLAN_WAKEUP_LINK_CHANGE);
1034 if (wowlan->magic_pkt)
1035 wowlan_config_cmd.wakeup_filter |=
1036 cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
1037 if (wowlan->gtk_rekey_failure)
1038 wowlan_config_cmd.wakeup_filter |=
1039 cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
1040 if (wowlan->eap_identity_req)
1041 wowlan_config_cmd.wakeup_filter |=
1042 cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
1043 if (wowlan->four_way_handshake)
1044 wowlan_config_cmd.wakeup_filter |=
1045 cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
1046 if (wowlan->n_patterns)
1047 wowlan_config_cmd.wakeup_filter |=
1048 cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
1049
1050 if (wowlan->rfkill_release)
1051 wowlan_config_cmd.wakeup_filter |=
1052 cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
1053
1054 if (wowlan->tcp) {
1055 /*
1056 * Set the "link change" (really "link lost") flag as well
1057 * since that implies losing the TCP connection.
1058 */
1059 wowlan_config_cmd.wakeup_filter |=
1060 cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
1061 IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
1062 IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
1063 IWL_WOWLAN_WAKEUP_LINK_CHANGE);
1064 }
1065
1066 iwl_mvm_cancel_scan(mvm);
1067
1068 iwl_trans_stop_device(mvm->trans);
1069
1070 /*
1071 * The D3 firmware still hardcodes the AP station ID for the
1072 * BSS we're associated with as 0. Store the real STA ID here
1073 * and assign 0. When we leave this function, we'll restore
1074 * the original value for the resume code.
1075 */
1076 old_ap_sta_id = mvm_ap_sta->sta_id;
1077 mvm_ap_sta->sta_id = 0;
1078 mvmvif->ap_sta_id = 0;
1079
1080 /*
1081 * Set the HW restart bit -- this is mostly true as we're
1082 * going to load new firmware and reprogram that, though
1083 * the reprogramming is going to be manual to avoid adding
1084 * all the MACs that aren't support.
1085 * We don't have to clear up everything though because the
1086 * reprogramming is manual. When we resume, we'll actually
1087 * go through a proper restart sequence again to switch
1088 * back to the runtime firmware image.
1089 */
1090 set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1091
1092 /* We reprogram keys and shouldn't allocate new key indices */
1093 memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
1094
1095 mvm->ptk_ivlen = 0;
1096 mvm->ptk_icvlen = 0;
1097 mvm->ptk_ivlen = 0;
1098 mvm->ptk_icvlen = 0;
1099
1100 /*
1101 * The D3 firmware still hardcodes the AP station ID for the
1102 * BSS we're associated with as 0. As a result, we have to move
1103 * the auxiliary station to ID 1 so the ID 0 remains free for
1104 * the AP station for later.
1105 * We set the sta_id to 1 here, and reset it to its previous
1106 * value (that we stored above) later.
1107 */
1108 mvm->aux_sta.sta_id = 1;
1109
1110 ret = iwl_mvm_load_d3_fw(mvm);
1111 if (ret)
1112 goto out;
1113
1114 ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
1115 if (ret)
1116 goto out;
1117
1118 if (!iwlwifi_mod_params.sw_crypto) {
1119 /*
1120 * This needs to be unlocked due to lock ordering
1121 * constraints. Since we're in the suspend path
1122 * that isn't really a problem though.
1123 */
1124 mutex_unlock(&mvm->mutex);
1125 ieee80211_iter_keys(mvm->hw, vif,
1126 iwl_mvm_wowlan_program_keys,
1127 &key_data);
1128 mutex_lock(&mvm->mutex);
1129 if (key_data.error) {
1130 ret = -EIO;
1131 goto out;
1132 }
1133
1134 if (key_data.use_rsc_tsc) {
1135 struct iwl_host_cmd rsc_tsc_cmd = {
1136 .id = WOWLAN_TSC_RSC_PARAM,
1137 .flags = CMD_SYNC,
1138 .data[0] = key_data.rsc_tsc,
1139 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
1140 .len[0] = sizeof(*key_data.rsc_tsc),
1141 };
1142
1143 ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
1144 if (ret)
1145 goto out;
1146 }
1147
1148 if (key_data.use_tkip) {
1149 ret = iwl_mvm_send_cmd_pdu(mvm,
1150 WOWLAN_TKIP_PARAM,
1151 CMD_SYNC, sizeof(tkip_cmd),
1152 &tkip_cmd);
1153 if (ret)
1154 goto out;
1155 }
1156
1157 if (mvmvif->rekey_data.valid) {
1158 memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
1159 memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
1160 NL80211_KCK_LEN);
1161 kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
1162 memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
1163 NL80211_KEK_LEN);
1164 kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
1165 kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
1166
1167 ret = iwl_mvm_send_cmd_pdu(mvm,
1168 WOWLAN_KEK_KCK_MATERIAL,
1169 CMD_SYNC,
1170 sizeof(kek_kck_cmd),
1171 &kek_kck_cmd);
1172 if (ret)
1173 goto out;
1174 }
1175 }
1176
1177 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION,
1178 CMD_SYNC, sizeof(wowlan_config_cmd),
1179 &wowlan_config_cmd);
1180 if (ret)
1181 goto out;
1182
1183 ret = iwl_mvm_send_patterns(mvm, wowlan);
1184 if (ret)
1185 goto out;
1186
1187 ret = iwl_mvm_send_proto_offload(mvm, vif);
1188 if (ret)
1189 goto out;
1190
1191 ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
1192 if (ret)
1193 goto out;
1194
1195 ret = iwl_mvm_power_update_device_mode(mvm);
1196 if (ret)
1197 goto out;
1198
1199 ret = iwl_mvm_power_update_mode(mvm, vif);
1200 if (ret)
1201 goto out;
1202
1203 #ifdef CONFIG_IWLWIFI_DEBUGFS
1204 if (mvm->d3_wake_sysassert)
1205 d3_cfg_cmd_data.wakeup_flags |=
1206 cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1207 #endif
1208
1209 /* must be last -- this switches firmware state */
1210 ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1211 if (ret)
1212 goto out;
1213 #ifdef CONFIG_IWLWIFI_DEBUGFS
1214 len = le32_to_cpu(d3_cfg_cmd.resp_pkt->len_n_flags) &
1215 FH_RSCSR_FRAME_SIZE_MSK;
1216 if (len >= sizeof(u32) * 2) {
1217 mvm->d3_test_pme_ptr =
1218 le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1219 } else if (test) {
1220 /* in test mode we require the pointer */
1221 ret = -EIO;
1222 goto out;
1223 }
1224 #endif
1225 iwl_free_resp(&d3_cfg_cmd);
1226
1227 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1228
1229 iwl_trans_d3_suspend(mvm->trans, test);
1230 out:
1231 mvm->aux_sta.sta_id = old_aux_sta_id;
1232 mvm_ap_sta->sta_id = old_ap_sta_id;
1233 mvmvif->ap_sta_id = old_ap_sta_id;
1234 out_noreset:
1235 kfree(key_data.rsc_tsc);
1236 if (ret < 0)
1237 ieee80211_restart_hw(mvm->hw);
1238
1239 mutex_unlock(&mvm->mutex);
1240
1241 return ret;
1242 }
1243
1244 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1245 {
1246 return __iwl_mvm_suspend(hw, wowlan, false);
1247 }
1248
1249 /* converted data from the different status responses */
1250 struct iwl_wowlan_status_data {
1251 u16 pattern_number;
1252 u16 qos_seq_ctr[8];
1253 u32 wakeup_reasons;
1254 u32 wake_packet_length;
1255 u32 wake_packet_bufsize;
1256 const u8 *wake_packet;
1257 };
1258
1259 static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1260 struct ieee80211_vif *vif,
1261 struct iwl_wowlan_status_data *status)
1262 {
1263 struct sk_buff *pkt = NULL;
1264 struct cfg80211_wowlan_wakeup wakeup = {
1265 .pattern_idx = -1,
1266 };
1267 struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1268 u32 reasons = status->wakeup_reasons;
1269
1270 if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1271 wakeup_report = NULL;
1272 goto report;
1273 }
1274
1275 if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1276 wakeup.magic_pkt = true;
1277
1278 if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1279 wakeup.pattern_idx =
1280 status->pattern_number;
1281
1282 if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1283 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1284 wakeup.disconnect = true;
1285
1286 if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1287 wakeup.gtk_rekey_failure = true;
1288
1289 if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1290 wakeup.rfkill_release = true;
1291
1292 if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1293 wakeup.eap_identity_req = true;
1294
1295 if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1296 wakeup.four_way_handshake = true;
1297
1298 if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1299 wakeup.tcp_connlost = true;
1300
1301 if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1302 wakeup.tcp_nomoretokens = true;
1303
1304 if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1305 wakeup.tcp_match = true;
1306
1307 if (status->wake_packet_bufsize) {
1308 int pktsize = status->wake_packet_bufsize;
1309 int pktlen = status->wake_packet_length;
1310 const u8 *pktdata = status->wake_packet;
1311 struct ieee80211_hdr *hdr = (void *)pktdata;
1312 int truncated = pktlen - pktsize;
1313
1314 /* this would be a firmware bug */
1315 if (WARN_ON_ONCE(truncated < 0))
1316 truncated = 0;
1317
1318 if (ieee80211_is_data(hdr->frame_control)) {
1319 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1320 int ivlen = 0, icvlen = 4; /* also FCS */
1321
1322 pkt = alloc_skb(pktsize, GFP_KERNEL);
1323 if (!pkt)
1324 goto report;
1325
1326 memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1327 pktdata += hdrlen;
1328 pktsize -= hdrlen;
1329
1330 if (ieee80211_has_protected(hdr->frame_control)) {
1331 /*
1332 * This is unlocked and using gtk_i(c)vlen,
1333 * but since everything is under RTNL still
1334 * that's not really a problem - changing
1335 * it would be difficult.
1336 */
1337 if (is_multicast_ether_addr(hdr->addr1)) {
1338 ivlen = mvm->gtk_ivlen;
1339 icvlen += mvm->gtk_icvlen;
1340 } else {
1341 ivlen = mvm->ptk_ivlen;
1342 icvlen += mvm->ptk_icvlen;
1343 }
1344 }
1345
1346 /* if truncated, FCS/ICV is (partially) gone */
1347 if (truncated >= icvlen) {
1348 icvlen = 0;
1349 truncated -= icvlen;
1350 } else {
1351 icvlen -= truncated;
1352 truncated = 0;
1353 }
1354
1355 pktsize -= ivlen + icvlen;
1356 pktdata += ivlen;
1357
1358 memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1359
1360 if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1361 goto report;
1362 wakeup.packet = pkt->data;
1363 wakeup.packet_present_len = pkt->len;
1364 wakeup.packet_len = pkt->len - truncated;
1365 wakeup.packet_80211 = false;
1366 } else {
1367 int fcslen = 4;
1368
1369 if (truncated >= 4) {
1370 truncated -= 4;
1371 fcslen = 0;
1372 } else {
1373 fcslen -= truncated;
1374 truncated = 0;
1375 }
1376 pktsize -= fcslen;
1377 wakeup.packet = status->wake_packet;
1378 wakeup.packet_present_len = pktsize;
1379 wakeup.packet_len = pktlen - truncated;
1380 wakeup.packet_80211 = true;
1381 }
1382 }
1383
1384 report:
1385 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1386 kfree_skb(pkt);
1387 }
1388
1389 static void iwl_mvm_aes_sc_to_seq(struct aes_sc *sc,
1390 struct ieee80211_key_seq *seq)
1391 {
1392 u64 pn;
1393
1394 pn = le64_to_cpu(sc->pn);
1395 seq->ccmp.pn[0] = pn >> 40;
1396 seq->ccmp.pn[1] = pn >> 32;
1397 seq->ccmp.pn[2] = pn >> 24;
1398 seq->ccmp.pn[3] = pn >> 16;
1399 seq->ccmp.pn[4] = pn >> 8;
1400 seq->ccmp.pn[5] = pn;
1401 }
1402
1403 static void iwl_mvm_tkip_sc_to_seq(struct tkip_sc *sc,
1404 struct ieee80211_key_seq *seq)
1405 {
1406 seq->tkip.iv32 = le32_to_cpu(sc->iv32);
1407 seq->tkip.iv16 = le16_to_cpu(sc->iv16);
1408 }
1409
1410 static void iwl_mvm_set_aes_rx_seq(struct aes_sc *scs,
1411 struct ieee80211_key_conf *key)
1412 {
1413 int tid;
1414
1415 BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1416
1417 for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1418 struct ieee80211_key_seq seq = {};
1419
1420 iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1421 ieee80211_set_key_rx_seq(key, tid, &seq);
1422 }
1423 }
1424
1425 static void iwl_mvm_set_tkip_rx_seq(struct tkip_sc *scs,
1426 struct ieee80211_key_conf *key)
1427 {
1428 int tid;
1429
1430 BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1431
1432 for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1433 struct ieee80211_key_seq seq = {};
1434
1435 iwl_mvm_tkip_sc_to_seq(&scs[tid], &seq);
1436 ieee80211_set_key_rx_seq(key, tid, &seq);
1437 }
1438 }
1439
1440 static void iwl_mvm_set_key_rx_seq(struct ieee80211_key_conf *key,
1441 struct iwl_wowlan_status_v6 *status)
1442 {
1443 union iwl_all_tsc_rsc *rsc = &status->gtk.rsc.all_tsc_rsc;
1444
1445 switch (key->cipher) {
1446 case WLAN_CIPHER_SUITE_CCMP:
1447 iwl_mvm_set_aes_rx_seq(rsc->aes.multicast_rsc, key);
1448 break;
1449 case WLAN_CIPHER_SUITE_TKIP:
1450 iwl_mvm_set_tkip_rx_seq(rsc->tkip.multicast_rsc, key);
1451 break;
1452 default:
1453 WARN_ON(1);
1454 }
1455 }
1456
1457 struct iwl_mvm_d3_gtk_iter_data {
1458 struct iwl_wowlan_status_v6 *status;
1459 void *last_gtk;
1460 u32 cipher;
1461 bool find_phase, unhandled_cipher;
1462 int num_keys;
1463 };
1464
1465 static void iwl_mvm_d3_update_gtks(struct ieee80211_hw *hw,
1466 struct ieee80211_vif *vif,
1467 struct ieee80211_sta *sta,
1468 struct ieee80211_key_conf *key,
1469 void *_data)
1470 {
1471 struct iwl_mvm_d3_gtk_iter_data *data = _data;
1472
1473 if (data->unhandled_cipher)
1474 return;
1475
1476 switch (key->cipher) {
1477 case WLAN_CIPHER_SUITE_WEP40:
1478 case WLAN_CIPHER_SUITE_WEP104:
1479 /* ignore WEP completely, nothing to do */
1480 return;
1481 case WLAN_CIPHER_SUITE_CCMP:
1482 case WLAN_CIPHER_SUITE_TKIP:
1483 /* we support these */
1484 break;
1485 default:
1486 /* everything else (even CMAC for MFP) - disconnect from AP */
1487 data->unhandled_cipher = true;
1488 return;
1489 }
1490
1491 data->num_keys++;
1492
1493 /*
1494 * pairwise key - update sequence counters only;
1495 * note that this assumes no TDLS sessions are active
1496 */
1497 if (sta) {
1498 struct ieee80211_key_seq seq = {};
1499 union iwl_all_tsc_rsc *sc = &data->status->gtk.rsc.all_tsc_rsc;
1500
1501 if (data->find_phase)
1502 return;
1503
1504 switch (key->cipher) {
1505 case WLAN_CIPHER_SUITE_CCMP:
1506 iwl_mvm_aes_sc_to_seq(&sc->aes.tsc, &seq);
1507 iwl_mvm_set_aes_rx_seq(sc->aes.unicast_rsc, key);
1508 break;
1509 case WLAN_CIPHER_SUITE_TKIP:
1510 iwl_mvm_tkip_sc_to_seq(&sc->tkip.tsc, &seq);
1511 iwl_mvm_set_tkip_rx_seq(sc->tkip.unicast_rsc, key);
1512 break;
1513 }
1514 ieee80211_set_key_tx_seq(key, &seq);
1515
1516 /* that's it for this key */
1517 return;
1518 }
1519
1520 if (data->find_phase) {
1521 data->last_gtk = key;
1522 data->cipher = key->cipher;
1523 return;
1524 }
1525
1526 if (data->status->num_of_gtk_rekeys)
1527 ieee80211_remove_key(key);
1528 else if (data->last_gtk == key)
1529 iwl_mvm_set_key_rx_seq(key, data->status);
1530 }
1531
1532 static bool iwl_mvm_setup_connection_keep(struct iwl_mvm *mvm,
1533 struct ieee80211_vif *vif,
1534 struct iwl_wowlan_status_v6 *status)
1535 {
1536 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1537 struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1538 .status = status,
1539 };
1540
1541 if (!status || !vif->bss_conf.bssid)
1542 return false;
1543
1544 /* find last GTK that we used initially, if any */
1545 gtkdata.find_phase = true;
1546 ieee80211_iter_keys(mvm->hw, vif,
1547 iwl_mvm_d3_update_gtks, &gtkdata);
1548 /* not trying to keep connections with MFP/unhandled ciphers */
1549 if (gtkdata.unhandled_cipher)
1550 return false;
1551 if (!gtkdata.num_keys)
1552 return true;
1553 if (!gtkdata.last_gtk)
1554 return false;
1555
1556 /*
1557 * invalidate all other GTKs that might still exist and update
1558 * the one that we used
1559 */
1560 gtkdata.find_phase = false;
1561 ieee80211_iter_keys(mvm->hw, vif,
1562 iwl_mvm_d3_update_gtks, &gtkdata);
1563
1564 if (status->num_of_gtk_rekeys) {
1565 struct ieee80211_key_conf *key;
1566 struct {
1567 struct ieee80211_key_conf conf;
1568 u8 key[32];
1569 } conf = {
1570 .conf.cipher = gtkdata.cipher,
1571 .conf.keyidx = status->gtk.key_index,
1572 };
1573
1574 switch (gtkdata.cipher) {
1575 case WLAN_CIPHER_SUITE_CCMP:
1576 conf.conf.keylen = WLAN_KEY_LEN_CCMP;
1577 memcpy(conf.conf.key, status->gtk.decrypt_key,
1578 WLAN_KEY_LEN_CCMP);
1579 break;
1580 case WLAN_CIPHER_SUITE_TKIP:
1581 conf.conf.keylen = WLAN_KEY_LEN_TKIP;
1582 memcpy(conf.conf.key, status->gtk.decrypt_key, 16);
1583 /* leave TX MIC key zeroed, we don't use it anyway */
1584 memcpy(conf.conf.key +
1585 NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY,
1586 status->gtk.tkip_mic_key, 8);
1587 break;
1588 }
1589
1590 key = ieee80211_gtk_rekey_add(vif, &conf.conf);
1591 if (IS_ERR(key))
1592 return false;
1593 iwl_mvm_set_key_rx_seq(key, status);
1594 }
1595
1596 if (status->num_of_gtk_rekeys) {
1597 __be64 replay_ctr =
1598 cpu_to_be64(le64_to_cpu(status->replay_ctr));
1599 ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
1600 (void *)&replay_ctr, GFP_KERNEL);
1601 }
1602
1603 mvmvif->seqno_valid = true;
1604 /* +0x10 because the set API expects next-to-use, not last-used */
1605 mvmvif->seqno = le16_to_cpu(status->non_qos_seq_ctr) + 0x10;
1606
1607 return true;
1608 }
1609
1610 /* releases the MVM mutex */
1611 static bool iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1612 struct ieee80211_vif *vif)
1613 {
1614 u32 base = mvm->error_event_table;
1615 struct error_table_start {
1616 /* cf. struct iwl_error_event_table */
1617 u32 valid;
1618 u32 error_id;
1619 } err_info;
1620 struct iwl_host_cmd cmd = {
1621 .id = WOWLAN_GET_STATUSES,
1622 .flags = CMD_SYNC | CMD_WANT_SKB,
1623 };
1624 struct iwl_wowlan_status_data status;
1625 struct iwl_wowlan_status_v6 *status_v6;
1626 int ret, len, status_size, i;
1627 bool keep;
1628 struct ieee80211_sta *ap_sta;
1629 struct iwl_mvm_sta *mvm_ap_sta;
1630
1631 iwl_trans_read_mem_bytes(mvm->trans, base,
1632 &err_info, sizeof(err_info));
1633
1634 if (err_info.valid) {
1635 IWL_INFO(mvm, "error table is valid (%d)\n",
1636 err_info.valid);
1637 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1638 struct cfg80211_wowlan_wakeup wakeup = {
1639 .rfkill_release = true,
1640 };
1641 ieee80211_report_wowlan_wakeup(vif, &wakeup,
1642 GFP_KERNEL);
1643 }
1644 goto out_unlock;
1645 }
1646
1647 /* only for tracing for now */
1648 ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, CMD_SYNC, 0, NULL);
1649 if (ret)
1650 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1651
1652 ret = iwl_mvm_send_cmd(mvm, &cmd);
1653 if (ret) {
1654 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1655 goto out_unlock;
1656 }
1657
1658 /* RF-kill already asserted again... */
1659 if (!cmd.resp_pkt)
1660 goto out_unlock;
1661
1662 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_D3_CONTINUITY_API)
1663 status_size = sizeof(struct iwl_wowlan_status_v6);
1664 else
1665 status_size = sizeof(struct iwl_wowlan_status_v4);
1666
1667 len = le32_to_cpu(cmd.resp_pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1668 if (len - sizeof(struct iwl_cmd_header) < status_size) {
1669 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1670 goto out_free_resp;
1671 }
1672
1673 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_D3_CONTINUITY_API) {
1674 status_v6 = (void *)cmd.resp_pkt->data;
1675
1676 status.pattern_number = le16_to_cpu(status_v6->pattern_number);
1677 for (i = 0; i < 8; i++)
1678 status.qos_seq_ctr[i] =
1679 le16_to_cpu(status_v6->qos_seq_ctr[i]);
1680 status.wakeup_reasons = le32_to_cpu(status_v6->wakeup_reasons);
1681 status.wake_packet_length =
1682 le32_to_cpu(status_v6->wake_packet_length);
1683 status.wake_packet_bufsize =
1684 le32_to_cpu(status_v6->wake_packet_bufsize);
1685 status.wake_packet = status_v6->wake_packet;
1686 } else {
1687 struct iwl_wowlan_status_v4 *status_v4;
1688 status_v6 = NULL;
1689 status_v4 = (void *)cmd.resp_pkt->data;
1690
1691 status.pattern_number = le16_to_cpu(status_v4->pattern_number);
1692 for (i = 0; i < 8; i++)
1693 status.qos_seq_ctr[i] =
1694 le16_to_cpu(status_v4->qos_seq_ctr[i]);
1695 status.wakeup_reasons = le32_to_cpu(status_v4->wakeup_reasons);
1696 status.wake_packet_length =
1697 le32_to_cpu(status_v4->wake_packet_length);
1698 status.wake_packet_bufsize =
1699 le32_to_cpu(status_v4->wake_packet_bufsize);
1700 status.wake_packet = status_v4->wake_packet;
1701 }
1702
1703 if (len - sizeof(struct iwl_cmd_header) !=
1704 status_size + ALIGN(status.wake_packet_bufsize, 4)) {
1705 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1706 goto out_free_resp;
1707 }
1708
1709 /* still at hard-coded place 0 for D3 image */
1710 ap_sta = rcu_dereference_protected(
1711 mvm->fw_id_to_mac_id[0],
1712 lockdep_is_held(&mvm->mutex));
1713 if (IS_ERR_OR_NULL(ap_sta))
1714 goto out_free_resp;
1715
1716 mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
1717 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1718 u16 seq = status.qos_seq_ctr[i];
1719 /* firmware stores last-used value, we store next value */
1720 seq += 0x10;
1721 mvm_ap_sta->tid_data[i].seq_number = seq;
1722 }
1723
1724 /* now we have all the data we need, unlock to avoid mac80211 issues */
1725 mutex_unlock(&mvm->mutex);
1726
1727 iwl_mvm_report_wakeup_reasons(mvm, vif, &status);
1728
1729 keep = iwl_mvm_setup_connection_keep(mvm, vif, status_v6);
1730
1731 iwl_free_resp(&cmd);
1732 return keep;
1733
1734 out_free_resp:
1735 iwl_free_resp(&cmd);
1736 out_unlock:
1737 mutex_unlock(&mvm->mutex);
1738 return false;
1739 }
1740
1741 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
1742 {
1743 #ifdef CONFIG_IWLWIFI_DEBUGFS
1744 const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
1745 u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
1746 u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1747
1748 if (!mvm->store_d3_resume_sram)
1749 return;
1750
1751 if (!mvm->d3_resume_sram) {
1752 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
1753 if (!mvm->d3_resume_sram)
1754 return;
1755 }
1756
1757 iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
1758 #endif
1759 }
1760
1761 static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac,
1762 struct ieee80211_vif *vif)
1763 {
1764 /* skip the one we keep connection on */
1765 if (data == vif)
1766 return;
1767
1768 if (vif->type == NL80211_IFTYPE_STATION)
1769 ieee80211_resume_disconnect(vif);
1770 }
1771
1772 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
1773 {
1774 struct iwl_d3_iter_data resume_iter_data = {
1775 .mvm = mvm,
1776 };
1777 struct ieee80211_vif *vif = NULL;
1778 int ret;
1779 enum iwl_d3_status d3_status;
1780 bool keep = false;
1781
1782 mutex_lock(&mvm->mutex);
1783
1784 /* get the BSS vif pointer again */
1785 ieee80211_iterate_active_interfaces_atomic(
1786 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1787 iwl_mvm_d3_iface_iterator, &resume_iter_data);
1788
1789 if (WARN_ON(resume_iter_data.error || !resume_iter_data.vif))
1790 goto out_unlock;
1791
1792 vif = resume_iter_data.vif;
1793
1794 ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test);
1795 if (ret)
1796 goto out_unlock;
1797
1798 if (d3_status != IWL_D3_STATUS_ALIVE) {
1799 IWL_INFO(mvm, "Device was reset during suspend\n");
1800 goto out_unlock;
1801 }
1802
1803 /* query SRAM first in case we want event logging */
1804 iwl_mvm_read_d3_sram(mvm);
1805
1806 keep = iwl_mvm_query_wakeup_reasons(mvm, vif);
1807 /* has unlocked the mutex, so skip that */
1808 goto out;
1809
1810 out_unlock:
1811 mutex_unlock(&mvm->mutex);
1812
1813 out:
1814 if (!test)
1815 ieee80211_iterate_active_interfaces_rtnl(mvm->hw,
1816 IEEE80211_IFACE_ITER_NORMAL,
1817 iwl_mvm_d3_disconnect_iter, keep ? vif : NULL);
1818
1819 /* return 1 to reconfigure the device */
1820 set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1821 return 1;
1822 }
1823
1824 int iwl_mvm_resume(struct ieee80211_hw *hw)
1825 {
1826 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1827
1828 return __iwl_mvm_resume(mvm, false);
1829 }
1830
1831 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
1832 {
1833 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1834
1835 device_set_wakeup_enable(mvm->trans->dev, enabled);
1836 }
1837
1838 #ifdef CONFIG_IWLWIFI_DEBUGFS
1839 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
1840 {
1841 struct iwl_mvm *mvm = inode->i_private;
1842 int err;
1843
1844 if (mvm->d3_test_active)
1845 return -EBUSY;
1846
1847 file->private_data = inode->i_private;
1848
1849 ieee80211_stop_queues(mvm->hw);
1850 synchronize_net();
1851
1852 /* start pseudo D3 */
1853 rtnl_lock();
1854 err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
1855 rtnl_unlock();
1856 if (err > 0)
1857 err = -EINVAL;
1858 if (err) {
1859 ieee80211_wake_queues(mvm->hw);
1860 return err;
1861 }
1862 mvm->d3_test_active = true;
1863 return 0;
1864 }
1865
1866 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
1867 size_t count, loff_t *ppos)
1868 {
1869 struct iwl_mvm *mvm = file->private_data;
1870 u32 pme_asserted;
1871
1872 while (true) {
1873 pme_asserted = iwl_trans_read_mem32(mvm->trans,
1874 mvm->d3_test_pme_ptr);
1875 if (pme_asserted)
1876 break;
1877 if (msleep_interruptible(100))
1878 break;
1879 }
1880
1881 return 0;
1882 }
1883
1884 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
1885 struct ieee80211_vif *vif)
1886 {
1887 if (vif->type == NL80211_IFTYPE_STATION)
1888 ieee80211_connection_loss(vif);
1889 }
1890
1891 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
1892 {
1893 struct iwl_mvm *mvm = inode->i_private;
1894 int remaining_time = 10;
1895
1896 mvm->d3_test_active = false;
1897 __iwl_mvm_resume(mvm, true);
1898 iwl_abort_notification_waits(&mvm->notif_wait);
1899 ieee80211_restart_hw(mvm->hw);
1900
1901 /* wait for restart and disconnect all interfaces */
1902 while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1903 remaining_time > 0) {
1904 remaining_time--;
1905 msleep(1000);
1906 }
1907
1908 if (remaining_time == 0)
1909 IWL_ERR(mvm, "Timed out waiting for HW restart to finish!\n");
1910
1911 ieee80211_iterate_active_interfaces_atomic(
1912 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1913 iwl_mvm_d3_test_disconn_work_iter, NULL);
1914
1915 ieee80211_wake_queues(mvm->hw);
1916
1917 return 0;
1918 }
1919
1920 const struct file_operations iwl_dbgfs_d3_test_ops = {
1921 .llseek = no_llseek,
1922 .open = iwl_mvm_d3_test_open,
1923 .read = iwl_mvm_d3_test_read,
1924 .release = iwl_mvm_d3_test_release,
1925 };
1926 #endif
Linux kernel - Deliverables
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