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iwlwifi: mvm: allow firmware crashes to wake system for debug
[linux-2.6/btrfs-unstable.git] / drivers / net / wireless / iwlwifi / mvm / d3.c
blob7e5e5c2f9f87316f5319605b1d9c6814c2940dc0
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 "iwl-modparams.h"
71 #include "fw-api.h"
72 #include "mvm.h"
73
74 void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw,
75 struct ieee80211_vif *vif,
76 struct cfg80211_gtk_rekey_data *data)
77 {
78 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
79 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
80
81 if (iwlwifi_mod_params.sw_crypto)
82 return;
83
84 mutex_lock(&mvm->mutex);
85
86 memcpy(mvmvif->rekey_data.kek, data->kek, NL80211_KEK_LEN);
87 memcpy(mvmvif->rekey_data.kck, data->kck, NL80211_KCK_LEN);
88 mvmvif->rekey_data.replay_ctr =
89 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
90 mvmvif->rekey_data.valid = true;
91
92 mutex_unlock(&mvm->mutex);
93 }
94
95 #if IS_ENABLED(CONFIG_IPV6)
96 void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
97 struct ieee80211_vif *vif,
98 struct inet6_dev *idev)
99 {
100 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
101 struct inet6_ifaddr *ifa;
102 int idx = 0;
103
104 read_lock_bh(&idev->lock);
105 list_for_each_entry(ifa, &idev->addr_list, if_list) {
106 mvmvif->target_ipv6_addrs[idx] = ifa->addr;
107 idx++;
108 if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS)
109 break;
110 }
111 read_unlock_bh(&idev->lock);
112
113 mvmvif->num_target_ipv6_addrs = idx;
114 }
115 #endif
116
117 void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
118 struct ieee80211_vif *vif, int idx)
119 {
120 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
121
122 mvmvif->tx_key_idx = idx;
123 }
124
125 static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out)
126 {
127 int i;
128
129 for (i = 0; i < IWL_P1K_SIZE; i++)
130 out[i] = cpu_to_le16(p1k[i]);
131 }
132
133 struct wowlan_key_data {
134 struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc;
135 struct iwl_wowlan_tkip_params_cmd *tkip;
136 bool error, use_rsc_tsc, use_tkip;
137 int gtk_key_idx;
138 };
139
140 static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
141 struct ieee80211_vif *vif,
142 struct ieee80211_sta *sta,
143 struct ieee80211_key_conf *key,
144 void *_data)
145 {
146 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
147 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
148 struct wowlan_key_data *data = _data;
149 struct aes_sc *aes_sc, *aes_tx_sc = NULL;
150 struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
151 struct iwl_p1k_cache *rx_p1ks;
152 u8 *rx_mic_key;
153 struct ieee80211_key_seq seq;
154 u32 cur_rx_iv32 = 0;
155 u16 p1k[IWL_P1K_SIZE];
156 int ret, i;
157
158 mutex_lock(&mvm->mutex);
159
160 switch (key->cipher) {
161 case WLAN_CIPHER_SUITE_WEP40:
162 case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */
163 struct {
164 struct iwl_mvm_wep_key_cmd wep_key_cmd;
165 struct iwl_mvm_wep_key wep_key;
166 } __packed wkc = {
167 .wep_key_cmd.mac_id_n_color =
168 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
169 mvmvif->color)),
170 .wep_key_cmd.num_keys = 1,
171 /* firmware sets STA_KEY_FLG_WEP_13BYTES */
172 .wep_key_cmd.decryption_type = STA_KEY_FLG_WEP,
173 .wep_key.key_index = key->keyidx,
174 .wep_key.key_size = key->keylen,
175 };
176
177 /*
178 * This will fail -- the key functions don't set support
179 * pairwise WEP keys. However, that's better than silently
180 * failing WoWLAN. Or maybe not?
181 */
182 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
183 break;
184
185 memcpy(&wkc.wep_key.key[3], key->key, key->keylen);
186 if (key->keyidx == mvmvif->tx_key_idx) {
187 /* TX key must be at offset 0 */
188 wkc.wep_key.key_offset = 0;
189 } else {
190 /* others start at 1 */
191 data->gtk_key_idx++;
192 wkc.wep_key.key_offset = data->gtk_key_idx;
193 }
194
195 ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, CMD_SYNC,
196 sizeof(wkc), &wkc);
197 data->error = ret != 0;
198
199 mvm->ptk_ivlen = key->iv_len;
200 mvm->ptk_icvlen = key->icv_len;
201 mvm->gtk_ivlen = key->iv_len;
202 mvm->gtk_icvlen = key->icv_len;
203
204 /* don't upload key again */
205 goto out_unlock;
206 }
207 default:
208 data->error = true;
209 goto out_unlock;
210 case WLAN_CIPHER_SUITE_AES_CMAC:
211 /*
212 * Ignore CMAC keys -- the WoWLAN firmware doesn't support them
213 * but we also shouldn't abort suspend due to that. It does have
214 * support for the IGTK key renewal, but doesn't really use the
215 * IGTK for anything. This means we could spuriously wake up or
216 * be deauthenticated, but that was considered acceptable.
217 */
218 goto out_unlock;
219 case WLAN_CIPHER_SUITE_TKIP:
220 if (sta) {
221 tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
222 tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
223
224 rx_p1ks = data->tkip->rx_uni;
225
226 ieee80211_get_key_tx_seq(key, &seq);
227 tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
228 tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
229
230 ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
231 iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k);
232
233 memcpy(data->tkip->mic_keys.tx,
234 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
235 IWL_MIC_KEY_SIZE);
236
237 rx_mic_key = data->tkip->mic_keys.rx_unicast;
238 } else {
239 tkip_sc =
240 data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
241 rx_p1ks = data->tkip->rx_multi;
242 rx_mic_key = data->tkip->mic_keys.rx_mcast;
243 }
244
245 /*
246 * For non-QoS this relies on the fact that both the uCode and
247 * mac80211 use TID 0 (as they need to to avoid replay attacks)
248 * for checking the IV in the frames.
249 */
250 for (i = 0; i < IWL_NUM_RSC; i++) {
251 ieee80211_get_key_rx_seq(key, i, &seq);
252 tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
253 tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
254 /* wrapping isn't allowed, AP must rekey */
255 if (seq.tkip.iv32 > cur_rx_iv32)
256 cur_rx_iv32 = seq.tkip.iv32;
257 }
258
259 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
260 cur_rx_iv32, p1k);
261 iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k);
262 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
263 cur_rx_iv32 + 1, p1k);
264 iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k);
265
266 memcpy(rx_mic_key,
267 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
268 IWL_MIC_KEY_SIZE);
269
270 data->use_tkip = true;
271 data->use_rsc_tsc = true;
272 break;
273 case WLAN_CIPHER_SUITE_CCMP:
274 if (sta) {
275 u8 *pn = seq.ccmp.pn;
276
277 aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
278 aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
279
280 ieee80211_get_key_tx_seq(key, &seq);
281 aes_tx_sc->pn = cpu_to_le64((u64)pn[5] |
282 ((u64)pn[4] << 8) |
283 ((u64)pn[3] << 16) |
284 ((u64)pn[2] << 24) |
285 ((u64)pn[1] << 32) |
286 ((u64)pn[0] << 40));
287 } else {
288 aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
289 }
290
291 /*
292 * For non-QoS this relies on the fact that both the uCode and
293 * mac80211 use TID 0 for checking the IV in the frames.
294 */
295 for (i = 0; i < IWL_NUM_RSC; i++) {
296 u8 *pn = seq.ccmp.pn;
297
298 ieee80211_get_key_rx_seq(key, i, &seq);
299 aes_sc->pn = cpu_to_le64((u64)pn[5] |
300 ((u64)pn[4] << 8) |
301 ((u64)pn[3] << 16) |
302 ((u64)pn[2] << 24) |
303 ((u64)pn[1] << 32) |
304 ((u64)pn[0] << 40));
305 }
306 data->use_rsc_tsc = true;
307 break;
308 }
309
310 /*
311 * The D3 firmware hardcodes the key offset 0 as the key it uses
312 * to transmit packets to the AP, i.e. the PTK.
313 */
314 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
315 key->hw_key_idx = 0;
316 mvm->ptk_ivlen = key->iv_len;
317 mvm->ptk_icvlen = key->icv_len;
318 } else {
319 data->gtk_key_idx++;
320 key->hw_key_idx = data->gtk_key_idx;
321 mvm->gtk_ivlen = key->iv_len;
322 mvm->gtk_icvlen = key->icv_len;
323 }
324
325 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, true);
326 data->error = ret != 0;
327 out_unlock:
328 mutex_unlock(&mvm->mutex);
329 }
330
331 static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
332 struct cfg80211_wowlan *wowlan)
333 {
334 struct iwl_wowlan_patterns_cmd *pattern_cmd;
335 struct iwl_host_cmd cmd = {
336 .id = WOWLAN_PATTERNS,
337 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
338 .flags = CMD_SYNC,
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 static int iwl_mvm_send_proto_offload(struct iwl_mvm *mvm,
374 struct ieee80211_vif *vif)
375 {
376 struct iwl_proto_offload_cmd cmd = {};
377 #if IS_ENABLED(CONFIG_IPV6)
378 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
379 int i;
380
381 if (mvmvif->num_target_ipv6_addrs) {
382 cmd.enabled |= cpu_to_le32(IWL_D3_PROTO_OFFLOAD_NS);
383 memcpy(cmd.ndp_mac_addr, vif->addr, ETH_ALEN);
384 }
385
386 BUILD_BUG_ON(sizeof(cmd.target_ipv6_addr[i]) !=
387 sizeof(mvmvif->target_ipv6_addrs[i]));
388
389 for (i = 0; i < mvmvif->num_target_ipv6_addrs; i++)
390 memcpy(cmd.target_ipv6_addr[i],
391 &mvmvif->target_ipv6_addrs[i],
392 sizeof(cmd.target_ipv6_addr[i]));
393 #endif
394
395 if (vif->bss_conf.arp_addr_cnt) {
396 cmd.enabled |= cpu_to_le32(IWL_D3_PROTO_OFFLOAD_ARP);
397 cmd.host_ipv4_addr = vif->bss_conf.arp_addr_list[0];
398 memcpy(cmd.arp_mac_addr, vif->addr, ETH_ALEN);
399 }
400
401 if (!cmd.enabled)
402 return 0;
403
404 return iwl_mvm_send_cmd_pdu(mvm, PROT_OFFLOAD_CONFIG_CMD, CMD_SYNC,
405 sizeof(cmd), &cmd);
406 }
407
408 enum iwl_mvm_tcp_packet_type {
409 MVM_TCP_TX_SYN,
410 MVM_TCP_RX_SYNACK,
411 MVM_TCP_TX_DATA,
412 MVM_TCP_RX_ACK,
413 MVM_TCP_RX_WAKE,
414 MVM_TCP_TX_FIN,
415 };
416
417 static __le16 pseudo_hdr_check(int len, __be32 saddr, __be32 daddr)
418 {
419 __sum16 check = tcp_v4_check(len, saddr, daddr, 0);
420 return cpu_to_le16(be16_to_cpu((__force __be16)check));
421 }
422
423 static void iwl_mvm_build_tcp_packet(struct ieee80211_vif *vif,
424 struct cfg80211_wowlan_tcp *tcp,
425 void *_pkt, u8 *mask,
426 __le16 *pseudo_hdr_csum,
427 enum iwl_mvm_tcp_packet_type ptype)
428 {
429 struct {
430 struct ethhdr eth;
431 struct iphdr ip;
432 struct tcphdr tcp;
433 u8 data[];
434 } __packed *pkt = _pkt;
435 u16 ip_tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
436 int i;
437
438 pkt->eth.h_proto = cpu_to_be16(ETH_P_IP),
439 pkt->ip.version = 4;
440 pkt->ip.ihl = 5;
441 pkt->ip.protocol = IPPROTO_TCP;
442
443 switch (ptype) {
444 case MVM_TCP_TX_SYN:
445 case MVM_TCP_TX_DATA:
446 case MVM_TCP_TX_FIN:
447 memcpy(pkt->eth.h_dest, tcp->dst_mac, ETH_ALEN);
448 memcpy(pkt->eth.h_source, vif->addr, ETH_ALEN);
449 pkt->ip.ttl = 128;
450 pkt->ip.saddr = tcp->src;
451 pkt->ip.daddr = tcp->dst;
452 pkt->tcp.source = cpu_to_be16(tcp->src_port);
453 pkt->tcp.dest = cpu_to_be16(tcp->dst_port);
454 /* overwritten for TX SYN later */
455 pkt->tcp.doff = sizeof(struct tcphdr) / 4;
456 pkt->tcp.window = cpu_to_be16(65000);
457 break;
458 case MVM_TCP_RX_SYNACK:
459 case MVM_TCP_RX_ACK:
460 case MVM_TCP_RX_WAKE:
461 memcpy(pkt->eth.h_dest, vif->addr, ETH_ALEN);
462 memcpy(pkt->eth.h_source, tcp->dst_mac, ETH_ALEN);
463 pkt->ip.saddr = tcp->dst;
464 pkt->ip.daddr = tcp->src;
465 pkt->tcp.source = cpu_to_be16(tcp->dst_port);
466 pkt->tcp.dest = cpu_to_be16(tcp->src_port);
467 break;
468 default:
469 WARN_ON(1);
470 return;
471 }
472
473 switch (ptype) {
474 case MVM_TCP_TX_SYN:
475 /* firmware assumes 8 option bytes - 8 NOPs for now */
476 memset(pkt->data, 0x01, 8);
477 ip_tot_len += 8;
478 pkt->tcp.doff = (sizeof(struct tcphdr) + 8) / 4;
479 pkt->tcp.syn = 1;
480 break;
481 case MVM_TCP_TX_DATA:
482 ip_tot_len += tcp->payload_len;
483 memcpy(pkt->data, tcp->payload, tcp->payload_len);
484 pkt->tcp.psh = 1;
485 pkt->tcp.ack = 1;
486 break;
487 case MVM_TCP_TX_FIN:
488 pkt->tcp.fin = 1;
489 pkt->tcp.ack = 1;
490 break;
491 case MVM_TCP_RX_SYNACK:
492 pkt->tcp.syn = 1;
493 pkt->tcp.ack = 1;
494 break;
495 case MVM_TCP_RX_ACK:
496 pkt->tcp.ack = 1;
497 break;
498 case MVM_TCP_RX_WAKE:
499 ip_tot_len += tcp->wake_len;
500 pkt->tcp.psh = 1;
501 pkt->tcp.ack = 1;
502 memcpy(pkt->data, tcp->wake_data, tcp->wake_len);
503 break;
504 }
505
506 switch (ptype) {
507 case MVM_TCP_TX_SYN:
508 case MVM_TCP_TX_DATA:
509 case MVM_TCP_TX_FIN:
510 pkt->ip.tot_len = cpu_to_be16(ip_tot_len);
511 pkt->ip.check = ip_fast_csum(&pkt->ip, pkt->ip.ihl);
512 break;
513 case MVM_TCP_RX_WAKE:
514 for (i = 0; i < DIV_ROUND_UP(tcp->wake_len, 8); i++) {
515 u8 tmp = tcp->wake_mask[i];
516 mask[i + 6] |= tmp << 6;
517 if (i + 1 < DIV_ROUND_UP(tcp->wake_len, 8))
518 mask[i + 7] = tmp >> 2;
519 }
520 /* fall through for ethernet/IP/TCP headers mask */
521 case MVM_TCP_RX_SYNACK:
522 case MVM_TCP_RX_ACK:
523 mask[0] = 0xff; /* match ethernet */
524 /*
525 * match ethernet, ip.version, ip.ihl
526 * the ip.ihl half byte is really masked out by firmware
527 */
528 mask[1] = 0x7f;
529 mask[2] = 0x80; /* match ip.protocol */
530 mask[3] = 0xfc; /* match ip.saddr, ip.daddr */
531 mask[4] = 0x3f; /* match ip.daddr, tcp.source, tcp.dest */
532 mask[5] = 0x80; /* match tcp flags */
533 /* leave rest (0 or set for MVM_TCP_RX_WAKE) */
534 break;
535 };
536
537 *pseudo_hdr_csum = pseudo_hdr_check(ip_tot_len - sizeof(struct iphdr),
538 pkt->ip.saddr, pkt->ip.daddr);
539 }
540
541 static int iwl_mvm_send_remote_wake_cfg(struct iwl_mvm *mvm,
542 struct ieee80211_vif *vif,
543 struct cfg80211_wowlan_tcp *tcp)
544 {
545 struct iwl_wowlan_remote_wake_config *cfg;
546 struct iwl_host_cmd cmd = {
547 .id = REMOTE_WAKE_CONFIG_CMD,
548 .len = { sizeof(*cfg), },
549 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
550 .flags = CMD_SYNC,
551 };
552 int ret;
553
554 if (!tcp)
555 return 0;
556
557 cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
558 if (!cfg)
559 return -ENOMEM;
560 cmd.data[0] = cfg;
561
562 cfg->max_syn_retries = 10;
563 cfg->max_data_retries = 10;
564 cfg->tcp_syn_ack_timeout = 1; /* seconds */
565 cfg->tcp_ack_timeout = 1; /* seconds */
566
567 /* SYN (TX) */
568 iwl_mvm_build_tcp_packet(
569 vif, tcp, cfg->syn_tx.data, NULL,
570 &cfg->syn_tx.info.tcp_pseudo_header_checksum,
571 MVM_TCP_TX_SYN);
572 cfg->syn_tx.info.tcp_payload_length = 0;
573
574 /* SYN/ACK (RX) */
575 iwl_mvm_build_tcp_packet(
576 vif, tcp, cfg->synack_rx.data, cfg->synack_rx.rx_mask,
577 &cfg->synack_rx.info.tcp_pseudo_header_checksum,
578 MVM_TCP_RX_SYNACK);
579 cfg->synack_rx.info.tcp_payload_length = 0;
580
581 /* KEEPALIVE/ACK (TX) */
582 iwl_mvm_build_tcp_packet(
583 vif, tcp, cfg->keepalive_tx.data, NULL,
584 &cfg->keepalive_tx.info.tcp_pseudo_header_checksum,
585 MVM_TCP_TX_DATA);
586 cfg->keepalive_tx.info.tcp_payload_length =
587 cpu_to_le16(tcp->payload_len);
588 cfg->sequence_number_offset = tcp->payload_seq.offset;
589 /* length must be 0..4, the field is little endian */
590 cfg->sequence_number_length = tcp->payload_seq.len;
591 cfg->initial_sequence_number = cpu_to_le32(tcp->payload_seq.start);
592 cfg->keepalive_interval = cpu_to_le16(tcp->data_interval);
593 if (tcp->payload_tok.len) {
594 cfg->token_offset = tcp->payload_tok.offset;
595 cfg->token_length = tcp->payload_tok.len;
596 cfg->num_tokens =
597 cpu_to_le16(tcp->tokens_size % tcp->payload_tok.len);
598 memcpy(cfg->tokens, tcp->payload_tok.token_stream,
599 tcp->tokens_size);
600 } else {
601 /* set tokens to max value to almost never run out */
602 cfg->num_tokens = cpu_to_le16(65535);
603 }
604
605 /* ACK (RX) */
606 iwl_mvm_build_tcp_packet(
607 vif, tcp, cfg->keepalive_ack_rx.data,
608 cfg->keepalive_ack_rx.rx_mask,
609 &cfg->keepalive_ack_rx.info.tcp_pseudo_header_checksum,
610 MVM_TCP_RX_ACK);
611 cfg->keepalive_ack_rx.info.tcp_payload_length = 0;
612
613 /* WAKEUP (RX) */
614 iwl_mvm_build_tcp_packet(
615 vif, tcp, cfg->wake_rx.data, cfg->wake_rx.rx_mask,
616 &cfg->wake_rx.info.tcp_pseudo_header_checksum,
617 MVM_TCP_RX_WAKE);
618 cfg->wake_rx.info.tcp_payload_length =
619 cpu_to_le16(tcp->wake_len);
620
621 /* FIN */
622 iwl_mvm_build_tcp_packet(
623 vif, tcp, cfg->fin_tx.data, NULL,
624 &cfg->fin_tx.info.tcp_pseudo_header_checksum,
625 MVM_TCP_TX_FIN);
626 cfg->fin_tx.info.tcp_payload_length = 0;
627
628 ret = iwl_mvm_send_cmd(mvm, &cmd);
629 kfree(cfg);
630
631 return ret;
632 }
633
634 struct iwl_d3_iter_data {
635 struct iwl_mvm *mvm;
636 struct ieee80211_vif *vif;
637 bool error;
638 };
639
640 static void iwl_mvm_d3_iface_iterator(void *_data, u8 *mac,
641 struct ieee80211_vif *vif)
642 {
643 struct iwl_d3_iter_data *data = _data;
644 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
645
646 if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
647 return;
648
649 if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
650 return;
651
652 if (data->vif) {
653 IWL_ERR(data->mvm, "More than one managed interface active!\n");
654 data->error = true;
655 return;
656 }
657
658 data->vif = vif;
659 }
660
661 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
662 struct ieee80211_sta *ap_sta)
663 {
664 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
665 struct ieee80211_chanctx_conf *ctx;
666 u8 chains_static, chains_dynamic;
667 struct cfg80211_chan_def chandef;
668 int ret, i;
669 struct iwl_binding_cmd binding_cmd = {};
670 struct iwl_time_quota_cmd quota_cmd = {};
671 u32 status;
672
673 /* add back the PHY */
674 if (WARN_ON(!mvmvif->phy_ctxt))
675 return -EINVAL;
676
677 rcu_read_lock();
678 ctx = rcu_dereference(vif->chanctx_conf);
679 if (WARN_ON(!ctx)) {
680 rcu_read_unlock();
681 return -EINVAL;
682 }
683 chandef = ctx->def;
684 chains_static = ctx->rx_chains_static;
685 chains_dynamic = ctx->rx_chains_dynamic;
686 rcu_read_unlock();
687
688 ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
689 chains_static, chains_dynamic);
690 if (ret)
691 return ret;
692
693 /* add back the MAC */
694 mvmvif->uploaded = false;
695
696 if (WARN_ON(!vif->bss_conf.assoc))
697 return -EINVAL;
698 /* hack */
699 vif->bss_conf.assoc = false;
700 ret = iwl_mvm_mac_ctxt_add(mvm, vif);
701 vif->bss_conf.assoc = true;
702 if (ret)
703 return ret;
704
705 /* add back binding - XXX refactor? */
706 binding_cmd.id_and_color =
707 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
708 mvmvif->phy_ctxt->color));
709 binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
710 binding_cmd.phy =
711 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
712 mvmvif->phy_ctxt->color));
713 binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
714 mvmvif->color));
715 for (i = 1; i < MAX_MACS_IN_BINDING; i++)
716 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
717
718 status = 0;
719 ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
720 sizeof(binding_cmd), &binding_cmd,
721 &status);
722 if (ret) {
723 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
724 return ret;
725 }
726
727 if (status) {
728 IWL_ERR(mvm, "Binding command failed: %u\n", status);
729 return -EIO;
730 }
731
732 ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false);
733 if (ret)
734 return ret;
735 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
736
737 ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
738 if (ret)
739 return ret;
740
741 /* and some quota */
742 quota_cmd.quotas[0].id_and_color =
743 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
744 mvmvif->phy_ctxt->color));
745 quota_cmd.quotas[0].quota = cpu_to_le32(100);
746 quota_cmd.quotas[0].max_duration = cpu_to_le32(1000);
747
748 for (i = 1; i < MAX_BINDINGS; i++)
749 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
750
751 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, CMD_SYNC,
752 sizeof(quota_cmd), &quota_cmd);
753 if (ret)
754 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
755
756 return 0;
757 }
758
759 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
760 struct cfg80211_wowlan *wowlan,
761 bool test)
762 {
763 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
764 struct iwl_d3_iter_data suspend_iter_data = {
765 .mvm = mvm,
766 };
767 struct ieee80211_vif *vif;
768 struct iwl_mvm_vif *mvmvif;
769 struct ieee80211_sta *ap_sta;
770 struct iwl_mvm_sta *mvm_ap_sta;
771 struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
772 struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
773 struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
774 struct iwl_d3_manager_config d3_cfg_cmd_data = {
775 /*
776 * Program the minimum sleep time to 10 seconds, as many
777 * platforms have issues processing a wakeup signal while
778 * still being in the process of suspending.
779 */
780 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
781 };
782 struct iwl_host_cmd d3_cfg_cmd = {
783 .id = D3_CONFIG_CMD,
784 .flags = CMD_SYNC | CMD_WANT_SKB,
785 .data[0] = &d3_cfg_cmd_data,
786 .len[0] = sizeof(d3_cfg_cmd_data),
787 };
788 struct wowlan_key_data key_data = {
789 .use_rsc_tsc = false,
790 .tkip = &tkip_cmd,
791 .use_tkip = false,
792 };
793 int ret, i;
794 int len __maybe_unused;
795 u16 seq;
796 u8 old_aux_sta_id, old_ap_sta_id = IWL_MVM_STATION_COUNT;
797
798 if (!wowlan) {
799 /*
800 * mac80211 shouldn't get here, but for D3 test
801 * it doesn't warrant a warning
802 */
803 WARN_ON(!test);
804 return -EINVAL;
805 }
806
807 key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
808 if (!key_data.rsc_tsc)
809 return -ENOMEM;
810
811 mutex_lock(&mvm->mutex);
812
813 old_aux_sta_id = mvm->aux_sta.sta_id;
814
815 /* see if there's only a single BSS vif and it's associated */
816 ieee80211_iterate_active_interfaces_atomic(
817 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
818 iwl_mvm_d3_iface_iterator, &suspend_iter_data);
819
820 if (suspend_iter_data.error || !suspend_iter_data.vif) {
821 ret = 1;
822 goto out_noreset;
823 }
824
825 vif = suspend_iter_data.vif;
826 mvmvif = iwl_mvm_vif_from_mac80211(vif);
827
828 ap_sta = rcu_dereference_protected(
829 mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
830 lockdep_is_held(&mvm->mutex));
831 if (IS_ERR_OR_NULL(ap_sta)) {
832 ret = -EINVAL;
833 goto out_noreset;
834 }
835
836 mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
837
838 /*
839 * The D3 firmware still hardcodes the AP station ID for the
840 * BSS we're associated with as 0. Store the real STA ID here
841 * and assign 0. When we leave this function, we'll restore
842 * the original value for the resume code.
843 */
844 old_ap_sta_id = mvm_ap_sta->sta_id;
845 mvm_ap_sta->sta_id = 0;
846 mvmvif->ap_sta_id = 0;
847
848 /* TODO: wowlan_config_cmd.wowlan_ba_teardown_tids */
849
850 wowlan_config_cmd.is_11n_connection = ap_sta->ht_cap.ht_supported;
851
852 /*
853 * We know the last used seqno, and the uCode expects to know that
854 * one, it will increment before TX.
855 */
856 seq = mvm_ap_sta->last_seq_ctl & IEEE80211_SCTL_SEQ;
857 wowlan_config_cmd.non_qos_seq = cpu_to_le16(seq);
858
859 /*
860 * For QoS counters, we store the one to use next, so subtract 0x10
861 * since the uCode will add 0x10 *before* using the value while we
862 * increment after using the value (i.e. store the next value to use).
863 */
864 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
865 seq = mvm_ap_sta->tid_data[i].seq_number;
866 seq -= 0x10;
867 wowlan_config_cmd.qos_seq[i] = cpu_to_le16(seq);
868 }
869
870 if (wowlan->disconnect)
871 wowlan_config_cmd.wakeup_filter |=
872 cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
873 IWL_WOWLAN_WAKEUP_LINK_CHANGE);
874 if (wowlan->magic_pkt)
875 wowlan_config_cmd.wakeup_filter |=
876 cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
877 if (wowlan->gtk_rekey_failure)
878 wowlan_config_cmd.wakeup_filter |=
879 cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
880 if (wowlan->eap_identity_req)
881 wowlan_config_cmd.wakeup_filter |=
882 cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
883 if (wowlan->four_way_handshake)
884 wowlan_config_cmd.wakeup_filter |=
885 cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
886 if (wowlan->n_patterns)
887 wowlan_config_cmd.wakeup_filter |=
888 cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
889
890 if (wowlan->rfkill_release)
891 wowlan_config_cmd.wakeup_filter |=
892 cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
893
894 if (wowlan->tcp) {
895 /*
896 * Set the "link change" (really "link lost") flag as well
897 * since that implies losing the TCP connection.
898 */
899 wowlan_config_cmd.wakeup_filter |=
900 cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
901 IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
902 IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
903 IWL_WOWLAN_WAKEUP_LINK_CHANGE);
904 }
905
906 iwl_mvm_cancel_scan(mvm);
907
908 iwl_trans_stop_device(mvm->trans);
909
910 /*
911 * Set the HW restart bit -- this is mostly true as we're
912 * going to load new firmware and reprogram that, though
913 * the reprogramming is going to be manual to avoid adding
914 * all the MACs that aren't support.
915 * We don't have to clear up everything though because the
916 * reprogramming is manual. When we resume, we'll actually
917 * go through a proper restart sequence again to switch
918 * back to the runtime firmware image.
919 */
920 set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
921
922 /* We reprogram keys and shouldn't allocate new key indices */
923 memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
924
925 mvm->ptk_ivlen = 0;
926 mvm->ptk_icvlen = 0;
927 mvm->ptk_ivlen = 0;
928 mvm->ptk_icvlen = 0;
929
930 /*
931 * The D3 firmware still hardcodes the AP station ID for the
932 * BSS we're associated with as 0. As a result, we have to move
933 * the auxiliary station to ID 1 so the ID 0 remains free for
934 * the AP station for later.
935 * We set the sta_id to 1 here, and reset it to its previous
936 * value (that we stored above) later.
937 */
938 mvm->aux_sta.sta_id = 1;
939
940 ret = iwl_mvm_load_d3_fw(mvm);
941 if (ret)
942 goto out;
943
944 ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
945 if (ret)
946 goto out;
947
948 if (!iwlwifi_mod_params.sw_crypto) {
949 /*
950 * This needs to be unlocked due to lock ordering
951 * constraints. Since we're in the suspend path
952 * that isn't really a problem though.
953 */
954 mutex_unlock(&mvm->mutex);
955 ieee80211_iter_keys(mvm->hw, vif,
956 iwl_mvm_wowlan_program_keys,
957 &key_data);
958 mutex_lock(&mvm->mutex);
959 if (key_data.error) {
960 ret = -EIO;
961 goto out;
962 }
963
964 if (key_data.use_rsc_tsc) {
965 struct iwl_host_cmd rsc_tsc_cmd = {
966 .id = WOWLAN_TSC_RSC_PARAM,
967 .flags = CMD_SYNC,
968 .data[0] = key_data.rsc_tsc,
969 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
970 .len[0] = sizeof(*key_data.rsc_tsc),
971 };
972
973 ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
974 if (ret)
975 goto out;
976 }
977
978 if (key_data.use_tkip) {
979 ret = iwl_mvm_send_cmd_pdu(mvm,
980 WOWLAN_TKIP_PARAM,
981 CMD_SYNC, sizeof(tkip_cmd),
982 &tkip_cmd);
983 if (ret)
984 goto out;
985 }
986
987 if (mvmvif->rekey_data.valid) {
988 memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
989 memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
990 NL80211_KCK_LEN);
991 kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
992 memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
993 NL80211_KEK_LEN);
994 kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
995 kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
996
997 ret = iwl_mvm_send_cmd_pdu(mvm,
998 WOWLAN_KEK_KCK_MATERIAL,
999 CMD_SYNC,
1000 sizeof(kek_kck_cmd),
1001 &kek_kck_cmd);
1002 if (ret)
1003 goto out;
1004 }
1005 }
1006
1007 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION,
1008 CMD_SYNC, sizeof(wowlan_config_cmd),
1009 &wowlan_config_cmd);
1010 if (ret)
1011 goto out;
1012
1013 ret = iwl_mvm_send_patterns(mvm, wowlan);
1014 if (ret)
1015 goto out;
1016
1017 ret = iwl_mvm_send_proto_offload(mvm, vif);
1018 if (ret)
1019 goto out;
1020
1021 ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
1022 if (ret)
1023 goto out;
1024
1025 ret = iwl_mvm_power_update_mode(mvm, vif);
1026 if (ret)
1027 goto out;
1028
1029 #ifdef CONFIG_IWLWIFI_DEBUGFS
1030 if (mvm->d3_wake_sysassert)
1031 d3_cfg_cmd_data.wakeup_flags |=
1032 cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1033 #endif
1034
1035 /* must be last -- this switches firmware state */
1036 ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1037 if (ret)
1038 goto out;
1039 #ifdef CONFIG_IWLWIFI_DEBUGFS
1040 len = le32_to_cpu(d3_cfg_cmd.resp_pkt->len_n_flags) &
1041 FH_RSCSR_FRAME_SIZE_MSK;
1042 if (len >= sizeof(u32) * 2) {
1043 mvm->d3_test_pme_ptr =
1044 le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1045 } else if (test) {
1046 /* in test mode we require the pointer */
1047 ret = -EIO;
1048 goto out;
1049 }
1050 #endif
1051 iwl_free_resp(&d3_cfg_cmd);
1052
1053 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1054
1055 iwl_trans_d3_suspend(mvm->trans, test);
1056 out:
1057 mvm->aux_sta.sta_id = old_aux_sta_id;
1058 mvm_ap_sta->sta_id = old_ap_sta_id;
1059 mvmvif->ap_sta_id = old_ap_sta_id;
1060 out_noreset:
1061 kfree(key_data.rsc_tsc);
1062 if (ret < 0)
1063 ieee80211_restart_hw(mvm->hw);
1064
1065 mutex_unlock(&mvm->mutex);
1066
1067 return ret;
1068 }
1069
1070 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1071 {
1072 return __iwl_mvm_suspend(hw, wowlan, false);
1073 }
1074
1075 static void iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1076 struct ieee80211_vif *vif)
1077 {
1078 u32 base = mvm->error_event_table;
1079 struct error_table_start {
1080 /* cf. struct iwl_error_event_table */
1081 u32 valid;
1082 u32 error_id;
1083 } err_info;
1084 struct cfg80211_wowlan_wakeup wakeup = {
1085 .pattern_idx = -1,
1086 };
1087 struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1088 struct iwl_host_cmd cmd = {
1089 .id = WOWLAN_GET_STATUSES,
1090 .flags = CMD_SYNC | CMD_WANT_SKB,
1091 };
1092 struct iwl_wowlan_status *status;
1093 u32 reasons;
1094 int ret, len;
1095 struct sk_buff *pkt = NULL;
1096
1097 iwl_trans_read_mem_bytes(mvm->trans, base,
1098 &err_info, sizeof(err_info));
1099
1100 if (err_info.valid) {
1101 IWL_INFO(mvm, "error table is valid (%d)\n",
1102 err_info.valid);
1103 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1104 wakeup.rfkill_release = true;
1105 ieee80211_report_wowlan_wakeup(vif, &wakeup,
1106 GFP_KERNEL);
1107 }
1108 return;
1109 }
1110
1111 /* only for tracing for now */
1112 ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, CMD_SYNC, 0, NULL);
1113 if (ret)
1114 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1115
1116 ret = iwl_mvm_send_cmd(mvm, &cmd);
1117 if (ret) {
1118 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1119 return;
1120 }
1121
1122 /* RF-kill already asserted again... */
1123 if (!cmd.resp_pkt)
1124 return;
1125
1126 len = le32_to_cpu(cmd.resp_pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1127 if (len - sizeof(struct iwl_cmd_header) < sizeof(*status)) {
1128 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1129 goto out;
1130 }
1131
1132 status = (void *)cmd.resp_pkt->data;
1133
1134 if (len - sizeof(struct iwl_cmd_header) !=
1135 sizeof(*status) +
1136 ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4)) {
1137 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1138 goto out;
1139 }
1140
1141 reasons = le32_to_cpu(status->wakeup_reasons);
1142
1143 if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1144 wakeup_report = NULL;
1145 goto report;
1146 }
1147
1148 if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1149 wakeup.magic_pkt = true;
1150
1151 if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1152 wakeup.pattern_idx =
1153 le16_to_cpu(status->pattern_number);
1154
1155 if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1156 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1157 wakeup.disconnect = true;
1158
1159 if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1160 wakeup.gtk_rekey_failure = true;
1161
1162 if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1163 wakeup.rfkill_release = true;
1164
1165 if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1166 wakeup.eap_identity_req = true;
1167
1168 if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1169 wakeup.four_way_handshake = true;
1170
1171 if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1172 wakeup.tcp_connlost = true;
1173
1174 if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1175 wakeup.tcp_nomoretokens = true;
1176
1177 if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1178 wakeup.tcp_match = true;
1179
1180 if (status->wake_packet_bufsize) {
1181 int pktsize = le32_to_cpu(status->wake_packet_bufsize);
1182 int pktlen = le32_to_cpu(status->wake_packet_length);
1183 const u8 *pktdata = status->wake_packet;
1184 struct ieee80211_hdr *hdr = (void *)pktdata;
1185 int truncated = pktlen - pktsize;
1186
1187 /* this would be a firmware bug */
1188 if (WARN_ON_ONCE(truncated < 0))
1189 truncated = 0;
1190
1191 if (ieee80211_is_data(hdr->frame_control)) {
1192 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1193 int ivlen = 0, icvlen = 4; /* also FCS */
1194
1195 pkt = alloc_skb(pktsize, GFP_KERNEL);
1196 if (!pkt)
1197 goto report;
1198
1199 memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1200 pktdata += hdrlen;
1201 pktsize -= hdrlen;
1202
1203 if (ieee80211_has_protected(hdr->frame_control)) {
1204 if (is_multicast_ether_addr(hdr->addr1)) {
1205 ivlen = mvm->gtk_ivlen;
1206 icvlen += mvm->gtk_icvlen;
1207 } else {
1208 ivlen = mvm->ptk_ivlen;
1209 icvlen += mvm->ptk_icvlen;
1210 }
1211 }
1212
1213 /* if truncated, FCS/ICV is (partially) gone */
1214 if (truncated >= icvlen) {
1215 icvlen = 0;
1216 truncated -= icvlen;
1217 } else {
1218 icvlen -= truncated;
1219 truncated = 0;
1220 }
1221
1222 pktsize -= ivlen + icvlen;
1223 pktdata += ivlen;
1224
1225 memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1226
1227 if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1228 goto report;
1229 wakeup.packet = pkt->data;
1230 wakeup.packet_present_len = pkt->len;
1231 wakeup.packet_len = pkt->len - truncated;
1232 wakeup.packet_80211 = false;
1233 } else {
1234 int fcslen = 4;
1235
1236 if (truncated >= 4) {
1237 truncated -= 4;
1238 fcslen = 0;
1239 } else {
1240 fcslen -= truncated;
1241 truncated = 0;
1242 }
1243 pktsize -= fcslen;
1244 wakeup.packet = status->wake_packet;
1245 wakeup.packet_present_len = pktsize;
1246 wakeup.packet_len = pktlen - truncated;
1247 wakeup.packet_80211 = true;
1248 }
1249 }
1250
1251 report:
1252 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1253 kfree_skb(pkt);
1254
1255 out:
1256 iwl_free_resp(&cmd);
1257 }
1258
1259 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
1260 {
1261 #ifdef CONFIG_IWLWIFI_DEBUGFS
1262 const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
1263 u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
1264 u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1265
1266 if (!mvm->store_d3_resume_sram)
1267 return;
1268
1269 if (!mvm->d3_resume_sram) {
1270 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
1271 if (!mvm->d3_resume_sram)
1272 return;
1273 }
1274
1275 iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
1276 #endif
1277 }
1278
1279 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
1280 {
1281 struct iwl_d3_iter_data resume_iter_data = {
1282 .mvm = mvm,
1283 };
1284 struct ieee80211_vif *vif = NULL;
1285 int ret;
1286 enum iwl_d3_status d3_status;
1287
1288 mutex_lock(&mvm->mutex);
1289
1290 /* get the BSS vif pointer again */
1291 ieee80211_iterate_active_interfaces_atomic(
1292 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1293 iwl_mvm_d3_iface_iterator, &resume_iter_data);
1294
1295 if (WARN_ON(resume_iter_data.error || !resume_iter_data.vif))
1296 goto out_unlock;
1297
1298 vif = resume_iter_data.vif;
1299
1300 ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test);
1301 if (ret)
1302 goto out_unlock;
1303
1304 if (d3_status != IWL_D3_STATUS_ALIVE) {
1305 IWL_INFO(mvm, "Device was reset during suspend\n");
1306 goto out_unlock;
1307 }
1308
1309 /* query SRAM first in case we want event logging */
1310 iwl_mvm_read_d3_sram(mvm);
1311
1312 iwl_mvm_query_wakeup_reasons(mvm, vif);
1313
1314 out_unlock:
1315 mutex_unlock(&mvm->mutex);
1316
1317 if (!test && vif)
1318 ieee80211_resume_disconnect(vif);
1319
1320 /* return 1 to reconfigure the device */
1321 set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1322 return 1;
1323 }
1324
1325 int iwl_mvm_resume(struct ieee80211_hw *hw)
1326 {
1327 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1328
1329 return __iwl_mvm_resume(mvm, false);
1330 }
1331
1332 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
1333 {
1334 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1335
1336 device_set_wakeup_enable(mvm->trans->dev, enabled);
1337 }
1338
1339 #ifdef CONFIG_IWLWIFI_DEBUGFS
1340 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
1341 {
1342 struct iwl_mvm *mvm = inode->i_private;
1343 int err;
1344
1345 if (mvm->d3_test_active)
1346 return -EBUSY;
1347
1348 file->private_data = inode->i_private;
1349
1350 ieee80211_stop_queues(mvm->hw);
1351 synchronize_net();
1352
1353 /* start pseudo D3 */
1354 rtnl_lock();
1355 err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
1356 rtnl_unlock();
1357 if (err > 0)
1358 err = -EINVAL;
1359 if (err) {
1360 ieee80211_wake_queues(mvm->hw);
1361 return err;
1362 }
1363 mvm->d3_test_active = true;
1364 return 0;
1365 }
1366
1367 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
1368 size_t count, loff_t *ppos)
1369 {
1370 struct iwl_mvm *mvm = file->private_data;
1371 u32 pme_asserted;
1372
1373 while (true) {
1374 pme_asserted = iwl_trans_read_mem32(mvm->trans,
1375 mvm->d3_test_pme_ptr);
1376 if (pme_asserted)
1377 break;
1378 if (msleep_interruptible(100))
1379 break;
1380 }
1381
1382 return 0;
1383 }
1384
1385 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
1386 struct ieee80211_vif *vif)
1387 {
1388 if (vif->type == NL80211_IFTYPE_STATION)
1389 ieee80211_connection_loss(vif);
1390 }
1391
1392 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
1393 {
1394 struct iwl_mvm *mvm = inode->i_private;
1395 int remaining_time = 10;
1396
1397 mvm->d3_test_active = false;
1398 __iwl_mvm_resume(mvm, true);
1399 iwl_abort_notification_waits(&mvm->notif_wait);
1400 ieee80211_restart_hw(mvm->hw);
1401
1402 /* wait for restart and disconnect all interfaces */
1403 while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1404 remaining_time > 0) {
1405 remaining_time--;
1406 msleep(1000);
1407 }
1408
1409 if (remaining_time == 0)
1410 IWL_ERR(mvm, "Timed out waiting for HW restart to finish!\n");
1411
1412 ieee80211_iterate_active_interfaces_atomic(
1413 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1414 iwl_mvm_d3_test_disconn_work_iter, NULL);
1415
1416 ieee80211_wake_queues(mvm->hw);
1417
1418 return 0;
1419 }
1420
1421 const struct file_operations iwl_dbgfs_d3_test_ops = {
1422 .llseek = no_llseek,
1423 .open = iwl_mvm_d3_test_open,
1424 .read = iwl_mvm_d3_test_read,
1425 .release = iwl_mvm_d3_test_release,
1426 };
1427 #endif
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