drivers/net/wireless/intel/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 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  10  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
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  30  *  Intel Linux Wireless <linuxwifi@intel.com>
  31  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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  33  * BSD LICENSE
  34  *
  35  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  37  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  38  * All rights reserved.
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  41  * modification, are permitted provided that the following conditions
  42  * are met:
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  45  *    notice, this list of conditions and the following disclaimer.
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  51  *    contributors may be used to endorse or promote products derived
  52  *    from this software without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  55  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  56  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  57  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  58  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  61  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  62  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  63  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  64  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  65  *
  66  *****************************************************************************/
  67
  68 #include <linux/etherdevice.h>
  69 #include <linux/ip.h>
  70 #include <linux/fs.h>
  71 #include <net/cfg80211.h>
  72 #include <net/ipv6.h>
  73 #include <net/tcp.h>
  74 #include <net/addrconf.h>
  75 #include "iwl-modparams.h"
  76 #include "fw-api.h"
  77 #include "mvm.h"
  78
  79 void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw,
  80                             struct ieee80211_vif *vif,
  81                             struct cfg80211_gtk_rekey_data *data)
  82 {
  83         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
  84         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  85
  86         if (iwlwifi_mod_params.swcrypto)
  87                 return;
  88
  89         mutex_lock(&mvm->mutex);
  90
  91         memcpy(mvmvif->rekey_data.kek, data->kek, NL80211_KEK_LEN);
  92         memcpy(mvmvif->rekey_data.kck, data->kck, NL80211_KCK_LEN);
  93         mvmvif->rekey_data.replay_ctr =
  94                 cpu_to_le64(be64_to_cpup((__be64 *)data->replay_ctr));
  95         mvmvif->rekey_data.valid = true;
  96
  97         mutex_unlock(&mvm->mutex);
  98 }
  99
 100 #if IS_ENABLED(CONFIG_IPV6)
 101 void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
 102                               struct ieee80211_vif *vif,
 103                               struct inet6_dev *idev)
 104 {
 105         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 106         struct inet6_ifaddr *ifa;
 107         int idx = 0;
 108
 109         memset(mvmvif->tentative_addrs, 0, sizeof(mvmvif->tentative_addrs));
 110
 111         read_lock_bh(&idev->lock);
 112         list_for_each_entry(ifa, &idev->addr_list, if_list) {
 113                 mvmvif->target_ipv6_addrs[idx] = ifa->addr;
 114                 if (ifa->flags & IFA_F_TENTATIVE)
 115                         __set_bit(idx, mvmvif->tentative_addrs);
 116                 idx++;
 117                 if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_MAX)
 118                         break;
 119         }
 120         read_unlock_bh(&idev->lock);
 121
 122         mvmvif->num_target_ipv6_addrs = idx;
 123 }
 124 #endif
 125
 126 void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
 127                                      struct ieee80211_vif *vif, int idx)
 128 {
 129         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 130
 131         mvmvif->tx_key_idx = idx;
 132 }
 133
 134 static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out)
 135 {
 136         int i;
 137
 138         for (i = 0; i < IWL_P1K_SIZE; i++)
 139                 out[i] = cpu_to_le16(p1k[i]);
 140 }
 141
 142 static const u8 *iwl_mvm_find_max_pn(struct ieee80211_key_conf *key,
 143                                      struct iwl_mvm_key_pn *ptk_pn,
 144                                      struct ieee80211_key_seq *seq,
 145                                      int tid, int queues)
 146 {
 147         const u8 *ret = seq->ccmp.pn;
 148         int i;
 149
 150         /* get the PN from mac80211, used on the default queue */
 151         ieee80211_get_key_rx_seq(key, tid, seq);
 152
 153         /* and use the internal data for the other queues */
 154         for (i = 1; i < queues; i++) {
 155                 const u8 *tmp = ptk_pn->q[i].pn[tid];
 156
 157                 if (memcmp(ret, tmp, IEEE80211_CCMP_PN_LEN) <= 0)
 158                         ret = tmp;
 159         }
 160
 161         return ret;
 162 }
 163
 164 struct wowlan_key_data {
 165         struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc;
 166         struct iwl_wowlan_tkip_params_cmd *tkip;
 167         bool error, use_rsc_tsc, use_tkip, configure_keys;
 168         int wep_key_idx;
 169 };
 170
 171 static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
 172                                         struct ieee80211_vif *vif,
 173                                         struct ieee80211_sta *sta,
 174                                         struct ieee80211_key_conf *key,
 175                                         void *_data)
 176 {
 177         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 178         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 179         struct wowlan_key_data *data = _data;
 180         struct aes_sc *aes_sc, *aes_tx_sc = NULL;
 181         struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
 182         struct iwl_p1k_cache *rx_p1ks;
 183         u8 *rx_mic_key;
 184         struct ieee80211_key_seq seq;
 185         u32 cur_rx_iv32 = 0;
 186         u16 p1k[IWL_P1K_SIZE];
 187         int ret, i;
 188
 189         switch (key->cipher) {
 190         case WLAN_CIPHER_SUITE_WEP40:
 191         case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */
 192                 struct {
 193                         struct iwl_mvm_wep_key_cmd wep_key_cmd;
 194                         struct iwl_mvm_wep_key wep_key;
 195                 } __packed wkc = {
 196                         .wep_key_cmd.mac_id_n_color =
 197                                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 198                                                                 mvmvif->color)),
 199                         .wep_key_cmd.num_keys = 1,
 200                         /* firmware sets STA_KEY_FLG_WEP_13BYTES */
 201                         .wep_key_cmd.decryption_type = STA_KEY_FLG_WEP,
 202                         .wep_key.key_index = key->keyidx,
 203                         .wep_key.key_size = key->keylen,
 204                 };
 205
 206                 /*
 207                  * This will fail -- the key functions don't set support
 208                  * pairwise WEP keys. However, that's better than silently
 209                  * failing WoWLAN. Or maybe not?
 210                  */
 211                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 212                         break;
 213
 214                 memcpy(&wkc.wep_key.key[3], key->key, key->keylen);
 215                 if (key->keyidx == mvmvif->tx_key_idx) {
 216                         /* TX key must be at offset 0 */
 217                         wkc.wep_key.key_offset = 0;
 218                 } else {
 219                         /* others start at 1 */
 220                         data->wep_key_idx++;
 221                         wkc.wep_key.key_offset = data->wep_key_idx;
 222                 }
 223
 224                 if (data->configure_keys) {
 225                         mutex_lock(&mvm->mutex);
 226                         ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, 0,
 227                                                    sizeof(wkc), &wkc);
 228                         data->error = ret != 0;
 229
 230                         mvm->ptk_ivlen = key->iv_len;
 231                         mvm->ptk_icvlen = key->icv_len;
 232                         mvm->gtk_ivlen = key->iv_len;
 233                         mvm->gtk_icvlen = key->icv_len;
 234                         mutex_unlock(&mvm->mutex);
 235                 }
 236
 237                 /* don't upload key again */
 238                 return;
 239         }
 240         default:
 241                 data->error = true;
 242                 return;
 243         case WLAN_CIPHER_SUITE_AES_CMAC:
 244                 /*
 245                  * Ignore CMAC keys -- the WoWLAN firmware doesn't support them
 246                  * but we also shouldn't abort suspend due to that. It does have
 247                  * support for the IGTK key renewal, but doesn't really use the
 248                  * IGTK for anything. This means we could spuriously wake up or
 249                  * be deauthenticated, but that was considered acceptable.
 250                  */
 251                 return;
 252         case WLAN_CIPHER_SUITE_TKIP:
 253                 if (sta) {
 254                         u64 pn64;
 255
 256                         tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
 257                         tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
 258
 259                         rx_p1ks = data->tkip->rx_uni;
 260
 261                         pn64 = atomic64_read(&key->tx_pn);
 262                         tkip_tx_sc->iv16 = cpu_to_le16(TKIP_PN_TO_IV16(pn64));
 263                         tkip_tx_sc->iv32 = cpu_to_le32(TKIP_PN_TO_IV32(pn64));
 264
 265                         ieee80211_get_tkip_p1k_iv(key, TKIP_PN_TO_IV32(pn64),
 266                                                   p1k);
 267                         iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k);
 268
 269                         memcpy(data->tkip->mic_keys.tx,
 270                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
 271                                IWL_MIC_KEY_SIZE);
 272
 273                         rx_mic_key = data->tkip->mic_keys.rx_unicast;
 274                 } else {
 275                         tkip_sc =
 276                                 data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
 277                         rx_p1ks = data->tkip->rx_multi;
 278                         rx_mic_key = data->tkip->mic_keys.rx_mcast;
 279                 }
 280
 281                 /*
 282                  * For non-QoS this relies on the fact that both the uCode and
 283                  * mac80211 use TID 0 (as they need to to avoid replay attacks)
 284                  * for checking the IV in the frames.
 285                  */
 286                 for (i = 0; i < IWL_NUM_RSC; i++) {
 287                         ieee80211_get_key_rx_seq(key, i, &seq);
 288                         tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
 289                         tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
 290                         /* wrapping isn't allowed, AP must rekey */
 291                         if (seq.tkip.iv32 > cur_rx_iv32)
 292                                 cur_rx_iv32 = seq.tkip.iv32;
 293                 }
 294
 295                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 296                                           cur_rx_iv32, p1k);
 297                 iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k);
 298                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 299                                           cur_rx_iv32 + 1, p1k);
 300                 iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k);
 301
 302                 memcpy(rx_mic_key,
 303                        &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
 304                        IWL_MIC_KEY_SIZE);
 305
 306                 data->use_tkip = true;
 307                 data->use_rsc_tsc = true;
 308                 break;
 309         case WLAN_CIPHER_SUITE_CCMP:
 310                 if (sta) {
 311                         u64 pn64;
 312
 313                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
 314                         aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
 315
 316                         pn64 = atomic64_read(&key->tx_pn);
 317                         aes_tx_sc->pn = cpu_to_le64(pn64);
 318                 } else {
 319                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
 320                 }
 321
 322                 /*
 323                  * For non-QoS this relies on the fact that both the uCode and
 324                  * mac80211/our RX code use TID 0 for checking the PN.
 325                  */
 326                 if (sta && iwl_mvm_has_new_rx_api(mvm)) {
 327                         struct iwl_mvm_sta *mvmsta;
 328                         struct iwl_mvm_key_pn *ptk_pn;
 329                         const u8 *pn;
 330
 331                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 332                         ptk_pn = rcu_dereference_protected(
 333                                                 mvmsta->ptk_pn[key->keyidx],
 334                                                 lockdep_is_held(&mvm->mutex));
 335                         if (WARN_ON(!ptk_pn))
 336                                 break;
 337
 338                         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
 339                                 pn = iwl_mvm_find_max_pn(key, ptk_pn, &seq, i,
 340                                                 mvm->trans->num_rx_queues);
 341                                 aes_sc[i].pn = cpu_to_le64((u64)pn[5] |
 342                                                            ((u64)pn[4] << 8) |
 343                                                            ((u64)pn[3] << 16) |
 344                                                            ((u64)pn[2] << 24) |
 345                                                            ((u64)pn[1] << 32) |
 346                                                            ((u64)pn[0] << 40));
 347                         }
 348                 } else {
 349                         for (i = 0; i < IWL_NUM_RSC; i++) {
 350                                 u8 *pn = seq.ccmp.pn;
 351
 352                                 ieee80211_get_key_rx_seq(key, i, &seq);
 353                                 aes_sc[i].pn = cpu_to_le64((u64)pn[5] |
 354                                                            ((u64)pn[4] << 8) |
 355                                                            ((u64)pn[3] << 16) |
 356                                                            ((u64)pn[2] << 24) |
 357                                                            ((u64)pn[1] << 32) |
 358                                                            ((u64)pn[0] << 40));
 359                         }
 360                 }
 361                 data->use_rsc_tsc = true;
 362                 break;
 363         }
 364
 365         if (data->configure_keys) {
 366                 mutex_lock(&mvm->mutex);
 367                 /*
 368                  * The D3 firmware hardcodes the key offset 0 as the key it
 369                  * uses to transmit packets to the AP, i.e. the PTK.
 370                  */
 371                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
 372                         mvm->ptk_ivlen = key->iv_len;
 373                         mvm->ptk_icvlen = key->icv_len;
 374                         ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, 0);
 375                 } else {
 376                         /*
 377                          * firmware only supports TSC/RSC for a single key,
 378                          * so if there are multiple keep overwriting them
 379                          * with new ones -- this relies on mac80211 doing
 380                          * list_add_tail().
 381                          */
 382                         mvm->gtk_ivlen = key->iv_len;
 383                         mvm->gtk_icvlen = key->icv_len;
 384                         ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, 1);
 385                 }
 386                 mutex_unlock(&mvm->mutex);
 387                 data->error = ret != 0;
 388         }
 389 }
 390
 391 static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
 392                                  struct cfg80211_wowlan *wowlan)
 393 {
 394         struct iwl_wowlan_patterns_cmd *pattern_cmd;
 395         struct iwl_host_cmd cmd = {
 396                 .id = WOWLAN_PATTERNS,
 397                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 398         };
 399         int i, err;
 400
 401         if (!wowlan->n_patterns)
 402                 return 0;
 403
 404         cmd.len[0] = sizeof(*pattern_cmd) +
 405                 wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern);
 406
 407         pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
 408         if (!pattern_cmd)
 409                 return -ENOMEM;
 410
 411         pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
 412
 413         for (i = 0; i < wowlan->n_patterns; i++) {
 414                 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
 415
 416                 memcpy(&pattern_cmd->patterns[i].mask,
 417                        wowlan->patterns[i].mask, mask_len);
 418                 memcpy(&pattern_cmd->patterns[i].pattern,
 419                        wowlan->patterns[i].pattern,
 420                        wowlan->patterns[i].pattern_len);
 421                 pattern_cmd->patterns[i].mask_size = mask_len;
 422                 pattern_cmd->patterns[i].pattern_size =
 423                         wowlan->patterns[i].pattern_len;
 424         }
 425
 426         cmd.data[0] = pattern_cmd;
 427         err = iwl_mvm_send_cmd(mvm, &cmd);
 428         kfree(pattern_cmd);
 429         return err;
 430 }
 431
 432 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 433                                 struct ieee80211_sta *ap_sta)
 434 {
 435         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 436         struct ieee80211_chanctx_conf *ctx;
 437         u8 chains_static, chains_dynamic;
 438         struct cfg80211_chan_def chandef;
 439         int ret, i;
 440         struct iwl_binding_cmd binding_cmd = {};
 441         struct iwl_time_quota_cmd quota_cmd = {};
 442         struct iwl_time_quota_data *quota;
 443         u32 status;
 444         int size;
 445
 446         if (fw_has_capa(&mvm->fw->ucode_capa,
 447                         IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT)) {
 448                 size = sizeof(binding_cmd);
 449                 if (mvmvif->phy_ctxt->channel->band == NL80211_BAND_2GHZ ||
 450                     !iwl_mvm_is_cdb_supported(mvm))
 451                         binding_cmd.lmac_id = cpu_to_le32(IWL_LMAC_24G_INDEX);
 452                 else
 453                         binding_cmd.lmac_id = cpu_to_le32(IWL_LMAC_5G_INDEX);
 454         } else {
 455                 size = IWL_BINDING_CMD_SIZE_V1;
 456         }
 457
 458         /* add back the PHY */
 459         if (WARN_ON(!mvmvif->phy_ctxt))
 460                 return -EINVAL;
 461
 462         rcu_read_lock();
 463         ctx = rcu_dereference(vif->chanctx_conf);
 464         if (WARN_ON(!ctx)) {
 465                 rcu_read_unlock();
 466                 return -EINVAL;
 467         }
 468         chandef = ctx->def;
 469         chains_static = ctx->rx_chains_static;
 470         chains_dynamic = ctx->rx_chains_dynamic;
 471         rcu_read_unlock();
 472
 473         ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
 474                                    chains_static, chains_dynamic);
 475         if (ret)
 476                 return ret;
 477
 478         /* add back the MAC */
 479         mvmvif->uploaded = false;
 480
 481         if (WARN_ON(!vif->bss_conf.assoc))
 482                 return -EINVAL;
 483
 484         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 485         if (ret)
 486                 return ret;
 487
 488         /* add back binding - XXX refactor? */
 489         binding_cmd.id_and_color =
 490                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 491                                                 mvmvif->phy_ctxt->color));
 492         binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
 493         binding_cmd.phy =
 494                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 495                                                 mvmvif->phy_ctxt->color));
 496         binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 497                                                               mvmvif->color));
 498         for (i = 1; i < MAX_MACS_IN_BINDING; i++)
 499                 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
 500
 501         status = 0;
 502         ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
 503                                           size, &binding_cmd, &status);
 504         if (ret) {
 505                 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
 506                 return ret;
 507         }
 508
 509         if (status) {
 510                 IWL_ERR(mvm, "Binding command failed: %u\n", status);
 511                 return -EIO;
 512         }
 513
 514         ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false, 0);
 515         if (ret)
 516                 return ret;
 517         rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
 518
 519         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
 520         if (ret)
 521                 return ret;
 522
 523         /* and some quota */
 524         quota = iwl_mvm_quota_cmd_get_quota(mvm, &quota_cmd, 0);
 525         quota->id_and_color =
 526                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 527                                                 mvmvif->phy_ctxt->color));
 528         quota->quota = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 529         quota->max_duration = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 530
 531         for (i = 1; i < MAX_BINDINGS; i++) {
 532                 quota = iwl_mvm_quota_cmd_get_quota(mvm, &quota_cmd, i);
 533                 quota->id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 534         }
 535
 536         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
 537                                    iwl_mvm_quota_cmd_size(mvm), &quota_cmd);
 538         if (ret)
 539                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 540
 541         if (iwl_mvm_is_lar_supported(mvm) && iwl_mvm_init_fw_regd(mvm))
 542                 IWL_ERR(mvm, "Failed to initialize D3 LAR information\n");
 543
 544         return 0;
 545 }
 546
 547 static int iwl_mvm_get_last_nonqos_seq(struct iwl_mvm *mvm,
 548                                        struct ieee80211_vif *vif)
 549 {
 550         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 551         struct iwl_nonqos_seq_query_cmd query_cmd = {
 552                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_GET),
 553                 .mac_id_n_color =
 554                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 555                                                         mvmvif->color)),
 556         };
 557         struct iwl_host_cmd cmd = {
 558                 .id = NON_QOS_TX_COUNTER_CMD,
 559                 .flags = CMD_WANT_SKB,
 560         };
 561         int err;
 562         u32 size;
 563
 564         cmd.data[0] = &query_cmd;
 565         cmd.len[0] = sizeof(query_cmd);
 566
 567         err = iwl_mvm_send_cmd(mvm, &cmd);
 568         if (err)
 569                 return err;
 570
 571         size = iwl_rx_packet_payload_len(cmd.resp_pkt);
 572         if (size < sizeof(__le16)) {
 573                 err = -EINVAL;
 574         } else {
 575                 err = le16_to_cpup((__le16 *)cmd.resp_pkt->data);
 576                 /* firmware returns next, not last-used seqno */
 577                 err = (u16) (err - 0x10);
 578         }
 579
 580         iwl_free_resp(&cmd);
 581         return err;
 582 }
 583
 584 void iwl_mvm_set_last_nonqos_seq(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 585 {
 586         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 587         struct iwl_nonqos_seq_query_cmd query_cmd = {
 588                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_SET),
 589                 .mac_id_n_color =
 590                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 591                                                         mvmvif->color)),
 592                 .value = cpu_to_le16(mvmvif->seqno),
 593         };
 594
 595         /* return if called during restart, not resume from D3 */
 596         if (!mvmvif->seqno_valid)
 597                 return;
 598
 599         mvmvif->seqno_valid = false;
 600
 601         if (iwl_mvm_send_cmd_pdu(mvm, NON_QOS_TX_COUNTER_CMD, 0,
 602                                  sizeof(query_cmd), &query_cmd))
 603                 IWL_ERR(mvm, "failed to set non-QoS seqno\n");
 604 }
 605
 606 static int iwl_mvm_switch_to_d3(struct iwl_mvm *mvm)
 607 {
 608         iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
 609
 610         iwl_mvm_stop_device(mvm);
 611         /*
 612          * Set the HW restart bit -- this is mostly true as we're
 613          * going to load new firmware and reprogram that, though
 614          * the reprogramming is going to be manual to avoid adding
 615          * all the MACs that aren't support.
 616          * We don't have to clear up everything though because the
 617          * reprogramming is manual. When we resume, we'll actually
 618          * go through a proper restart sequence again to switch
 619          * back to the runtime firmware image.
 620          */
 621         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 622
 623         /* the fw is reset, so all the keys are cleared */
 624         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 625
 626         mvm->ptk_ivlen = 0;
 627         mvm->ptk_icvlen = 0;
 628         mvm->ptk_ivlen = 0;
 629         mvm->ptk_icvlen = 0;
 630
 631         return iwl_mvm_load_d3_fw(mvm);
 632 }
 633
 634 static int
 635 iwl_mvm_get_wowlan_config(struct iwl_mvm *mvm,
 636                           struct cfg80211_wowlan *wowlan,
 637                           struct iwl_wowlan_config_cmd *wowlan_config_cmd,
 638                           struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
 639                           struct ieee80211_sta *ap_sta)
 640 {
 641         int ret;
 642         struct iwl_mvm_sta *mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
 643
 644         /* TODO: wowlan_config_cmd->wowlan_ba_teardown_tids */
 645
 646         wowlan_config_cmd->is_11n_connection =
 647                                         ap_sta->ht_cap.ht_supported;
 648         wowlan_config_cmd->flags = ENABLE_L3_FILTERING |
 649                 ENABLE_NBNS_FILTERING | ENABLE_DHCP_FILTERING;
 650
 651         /* Query the last used seqno and set it */
 652         ret = iwl_mvm_get_last_nonqos_seq(mvm, vif);
 653         if (ret < 0)
 654                 return ret;
 655
 656         wowlan_config_cmd->non_qos_seq = cpu_to_le16(ret);
 657
 658         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, wowlan_config_cmd);
 659
 660         if (wowlan->disconnect)
 661                 wowlan_config_cmd->wakeup_filter |=
 662                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 663                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 664         if (wowlan->magic_pkt)
 665                 wowlan_config_cmd->wakeup_filter |=
 666                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 667         if (wowlan->gtk_rekey_failure)
 668                 wowlan_config_cmd->wakeup_filter |=
 669                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 670         if (wowlan->eap_identity_req)
 671                 wowlan_config_cmd->wakeup_filter |=
 672                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 673         if (wowlan->four_way_handshake)
 674                 wowlan_config_cmd->wakeup_filter |=
 675                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 676         if (wowlan->n_patterns)
 677                 wowlan_config_cmd->wakeup_filter |=
 678                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 679
 680         if (wowlan->rfkill_release)
 681                 wowlan_config_cmd->wakeup_filter |=
 682                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 683
 684         if (wowlan->tcp) {
 685                 /*
 686                  * Set the "link change" (really "link lost") flag as well
 687                  * since that implies losing the TCP connection.
 688                  */
 689                 wowlan_config_cmd->wakeup_filter |=
 690                         cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
 691                                     IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
 692                                     IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
 693                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 694         }
 695
 696         return 0;
 697 }
 698
 699 static void
 700 iwl_mvm_iter_d0i3_ap_keys(struct iwl_mvm *mvm,
 701                           struct ieee80211_vif *vif,
 702                           void (*iter)(struct ieee80211_hw *hw,
 703                                        struct ieee80211_vif *vif,
 704                                        struct ieee80211_sta *sta,
 705                                        struct ieee80211_key_conf *key,
 706                                        void *data),
 707                           void *data)
 708 {
 709         struct ieee80211_sta *ap_sta;
 710
 711         rcu_read_lock();
 712
 713         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id]);
 714         if (IS_ERR_OR_NULL(ap_sta))
 715                 goto out;
 716
 717         ieee80211_iter_keys_rcu(mvm->hw, vif, iter, data);
 718 out:
 719         rcu_read_unlock();
 720 }
 721
 722 int iwl_mvm_wowlan_config_key_params(struct iwl_mvm *mvm,
 723                                      struct ieee80211_vif *vif,
 724                                      bool d0i3,
 725                                      u32 cmd_flags)
 726 {
 727         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 728         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 729         struct wowlan_key_data key_data = {
 730                 .configure_keys = !d0i3,
 731                 .use_rsc_tsc = false,
 732                 .tkip = &tkip_cmd,
 733                 .use_tkip = false,
 734         };
 735         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 736         int ret;
 737
 738         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 739         if (!key_data.rsc_tsc)
 740                 return -ENOMEM;
 741
 742         /*
 743          * if we have to configure keys, call ieee80211_iter_keys(),
 744          * as we need non-atomic context in order to take the
 745          * required locks.
 746          * for the d0i3 we can't use ieee80211_iter_keys(), as
 747          * taking (almost) any mutex might result in deadlock.
 748          */
 749         if (!d0i3) {
 750                 /*
 751                  * Note that currently we don't propagate cmd_flags
 752                  * to the iterator. In case of key_data.configure_keys,
 753                  * all the configured commands are SYNC, and
 754                  * iwl_mvm_wowlan_program_keys() will take care of
 755                  * locking/unlocking mvm->mutex.
 756                  */
 757                 ieee80211_iter_keys(mvm->hw, vif,
 758                                     iwl_mvm_wowlan_program_keys,
 759                                     &key_data);
 760         } else {
 761                 iwl_mvm_iter_d0i3_ap_keys(mvm, vif,
 762                                           iwl_mvm_wowlan_program_keys,
 763                                           &key_data);
 764         }
 765
 766         if (key_data.error) {
 767                 ret = -EIO;
 768                 goto out;
 769         }
 770
 771         if (key_data.use_rsc_tsc) {
 772                 ret = iwl_mvm_send_cmd_pdu(mvm,
 773                                            WOWLAN_TSC_RSC_PARAM, cmd_flags,
 774                                            sizeof(*key_data.rsc_tsc),
 775                                            key_data.rsc_tsc);
 776                 if (ret)
 777                         goto out;
 778         }
 779
 780         if (key_data.use_tkip &&
 781             !fw_has_api(&mvm->fw->ucode_capa,
 782                         IWL_UCODE_TLV_API_TKIP_MIC_KEYS)) {
 783                 ret = iwl_mvm_send_cmd_pdu(mvm,
 784                                            WOWLAN_TKIP_PARAM,
 785                                            cmd_flags, sizeof(tkip_cmd),
 786                                            &tkip_cmd);
 787                 if (ret)
 788                         goto out;
 789         }
 790
 791         /* configure rekey data only if offloaded rekey is supported (d3) */
 792         if (mvmvif->rekey_data.valid && !d0i3) {
 793                 memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
 794                 memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
 795                        NL80211_KCK_LEN);
 796                 kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
 797                 memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
 798                        NL80211_KEK_LEN);
 799                 kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
 800                 kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
 801
 802                 ret = iwl_mvm_send_cmd_pdu(mvm,
 803                                            WOWLAN_KEK_KCK_MATERIAL, cmd_flags,
 804                                            sizeof(kek_kck_cmd),
 805                                            &kek_kck_cmd);
 806                 if (ret)
 807                         goto out;
 808         }
 809         ret = 0;
 810 out:
 811         kfree(key_data.rsc_tsc);
 812         return ret;
 813 }
 814
 815 static int
 816 iwl_mvm_wowlan_config(struct iwl_mvm *mvm,
 817                       struct cfg80211_wowlan *wowlan,
 818                       struct iwl_wowlan_config_cmd *wowlan_config_cmd,
 819                       struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
 820                       struct ieee80211_sta *ap_sta)
 821 {
 822         int ret;
 823         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
 824                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
 825
 826         if (!unified_image) {
 827                 ret = iwl_mvm_switch_to_d3(mvm);
 828                 if (ret)
 829                         return ret;
 830
 831                 ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
 832                 if (ret)
 833                         return ret;
 834         }
 835
 836         if (!iwlwifi_mod_params.swcrypto) {
 837                 /*
 838                  * This needs to be unlocked due to lock ordering
 839                  * constraints. Since we're in the suspend path
 840                  * that isn't really a problem though.
 841                  */
 842                 mutex_unlock(&mvm->mutex);
 843                 ret = iwl_mvm_wowlan_config_key_params(mvm, vif, false,
 844                                                        CMD_ASYNC);
 845                 mutex_lock(&mvm->mutex);
 846                 if (ret)
 847                         return ret;
 848         }
 849
 850         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
 851                                    sizeof(*wowlan_config_cmd),
 852                                    wowlan_config_cmd);
 853         if (ret)
 854                 return ret;
 855
 856         ret = iwl_mvm_send_patterns(mvm, wowlan);
 857         if (ret)
 858                 return ret;
 859
 860         return iwl_mvm_send_proto_offload(mvm, vif, false, true, 0);
 861 }
 862
 863 static int
 864 iwl_mvm_netdetect_config(struct iwl_mvm *mvm,
 865                          struct cfg80211_wowlan *wowlan,
 866                          struct cfg80211_sched_scan_request *nd_config,
 867                          struct ieee80211_vif *vif)
 868 {
 869         struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
 870         int ret;
 871         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
 872                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
 873
 874         if (!unified_image) {
 875                 ret = iwl_mvm_switch_to_d3(mvm);
 876                 if (ret)
 877                         return ret;
 878         } else {
 879                 /* In theory, we wouldn't have to stop a running sched
 880                  * scan in order to start another one (for
 881                  * net-detect).  But in practice this doesn't seem to
 882                  * work properly, so stop any running sched_scan now.
 883                  */
 884                 ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
 885                 if (ret)
 886                         return ret;
 887         }
 888
 889         /* rfkill release can be either for wowlan or netdetect */
 890         if (wowlan->rfkill_release)
 891                 wowlan_config_cmd.wakeup_filter |=
 892                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 893
 894         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
 895                                    sizeof(wowlan_config_cmd),
 896                                    &wowlan_config_cmd);
 897         if (ret)
 898                 return ret;
 899
 900         ret = iwl_mvm_sched_scan_start(mvm, vif, nd_config, &mvm->nd_ies,
 901                                        IWL_MVM_SCAN_NETDETECT);
 902         if (ret)
 903                 return ret;
 904
 905         if (WARN_ON(mvm->nd_match_sets || mvm->nd_channels))
 906                 return -EBUSY;
 907
 908         /* save the sched scan matchsets... */
 909         if (nd_config->n_match_sets) {
 910                 mvm->nd_match_sets = kmemdup(nd_config->match_sets,
 911                                              sizeof(*nd_config->match_sets) *
 912                                              nd_config->n_match_sets,
 913                                              GFP_KERNEL);
 914                 if (mvm->nd_match_sets)
 915                         mvm->n_nd_match_sets = nd_config->n_match_sets;
 916         }
 917
 918         /* ...and the sched scan channels for later reporting */
 919         mvm->nd_channels = kmemdup(nd_config->channels,
 920                                    sizeof(*nd_config->channels) *
 921                                    nd_config->n_channels,
 922                                    GFP_KERNEL);
 923         if (mvm->nd_channels)
 924                 mvm->n_nd_channels = nd_config->n_channels;
 925
 926         return 0;
 927 }
 928
 929 static void iwl_mvm_free_nd(struct iwl_mvm *mvm)
 930 {
 931         kfree(mvm->nd_match_sets);
 932         mvm->nd_match_sets = NULL;
 933         mvm->n_nd_match_sets = 0;
 934         kfree(mvm->nd_channels);
 935         mvm->nd_channels = NULL;
 936         mvm->n_nd_channels = 0;
 937 }
 938
 939 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
 940                              struct cfg80211_wowlan *wowlan,
 941                              bool test)
 942 {
 943         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 944         struct ieee80211_vif *vif = NULL;
 945         struct iwl_mvm_vif *mvmvif = NULL;
 946         struct ieee80211_sta *ap_sta = NULL;
 947         struct iwl_d3_manager_config d3_cfg_cmd_data = {
 948                 /*
 949                  * Program the minimum sleep time to 10 seconds, as many
 950                  * platforms have issues processing a wakeup signal while
 951                  * still being in the process of suspending.
 952                  */
 953                 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
 954         };
 955         struct iwl_host_cmd d3_cfg_cmd = {
 956                 .id = D3_CONFIG_CMD,
 957                 .flags = CMD_WANT_SKB,
 958                 .data[0] = &d3_cfg_cmd_data,
 959                 .len[0] = sizeof(d3_cfg_cmd_data),
 960         };
 961         int ret;
 962         int len __maybe_unused;
 963         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
 964                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
 965
 966         if (!wowlan) {
 967                 /*
 968                  * mac80211 shouldn't get here, but for D3 test
 969                  * it doesn't warrant a warning
 970                  */
 971                 WARN_ON(!test);
 972                 return -EINVAL;
 973         }
 974
 975         mutex_lock(&mvm->mutex);
 976
 977         vif = iwl_mvm_get_bss_vif(mvm);
 978         if (IS_ERR_OR_NULL(vif)) {
 979                 ret = 1;
 980                 goto out_noreset;
 981         }
 982
 983         mvmvif = iwl_mvm_vif_from_mac80211(vif);
 984
 985         if (mvmvif->ap_sta_id == IWL_MVM_INVALID_STA) {
 986                 /* if we're not associated, this must be netdetect */
 987                 if (!wowlan->nd_config) {
 988                         ret = 1;
 989                         goto out_noreset;
 990                 }
 991
 992                 ret = iwl_mvm_netdetect_config(
 993                         mvm, wowlan, wowlan->nd_config, vif);
 994                 if (ret)
 995                         goto out;
 996
 997                 mvm->net_detect = true;
 998         } else {
 999                 struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
1000
1001                 ap_sta = rcu_dereference_protected(
1002                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
1003                         lockdep_is_held(&mvm->mutex));
1004                 if (IS_ERR_OR_NULL(ap_sta)) {
1005                         ret = -EINVAL;
1006                         goto out_noreset;
1007                 }
1008
1009                 ret = iwl_mvm_get_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1010                                                 vif, mvmvif, ap_sta);
1011                 if (ret)
1012                         goto out_noreset;
1013                 ret = iwl_mvm_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1014                                             vif, mvmvif, ap_sta);
1015                 if (ret)
1016                         goto out;
1017
1018                 mvm->net_detect = false;
1019         }
1020
1021         ret = iwl_mvm_power_update_device(mvm);
1022         if (ret)
1023                 goto out;
1024
1025         ret = iwl_mvm_power_update_mac(mvm);
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 = iwl_rx_packet_payload_len(d3_cfg_cmd.resp_pkt);
1041         if (len >= sizeof(u32)) {
1042                 mvm->d3_test_pme_ptr =
1043                         le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1044         }
1045 #endif
1046         iwl_free_resp(&d3_cfg_cmd);
1047
1048         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1049
1050         iwl_trans_d3_suspend(mvm->trans, test, !unified_image);
1051  out:
1052         if (ret < 0) {
1053                 iwl_mvm_free_nd(mvm);
1054
1055                 if (!unified_image) {
1056                         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1057                         if (mvm->fw_restart > 0) {
1058                                 mvm->fw_restart--;
1059                                 ieee80211_restart_hw(mvm->hw);
1060                         }
1061                 }
1062         }
1063  out_noreset:
1064         mutex_unlock(&mvm->mutex);
1065
1066         return ret;
1067 }
1068
1069 static int iwl_mvm_enter_d0i3_sync(struct iwl_mvm *mvm)
1070 {
1071         struct iwl_notification_wait wait_d3;
1072         static const u16 d3_notif[] = { D3_CONFIG_CMD };
1073         int ret;
1074
1075         iwl_init_notification_wait(&mvm->notif_wait, &wait_d3,
1076                                    d3_notif, ARRAY_SIZE(d3_notif),
1077                                    NULL, NULL);
1078
1079         ret = iwl_mvm_enter_d0i3(mvm->hw->priv);
1080         if (ret)
1081                 goto remove_notif;
1082
1083         ret = iwl_wait_notification(&mvm->notif_wait, &wait_d3, HZ);
1084         WARN_ON_ONCE(ret);
1085         return ret;
1086
1087 remove_notif:
1088         iwl_remove_notification(&mvm->notif_wait, &wait_d3);
1089         return ret;
1090 }
1091
1092 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1093 {
1094         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1095         struct iwl_trans *trans = mvm->trans;
1096         int ret;
1097
1098         /* make sure the d0i3 exit work is not pending */
1099         flush_work(&mvm->d0i3_exit_work);
1100
1101         iwl_fw_runtime_suspend(&mvm->fwrt);
1102
1103         ret = iwl_trans_suspend(trans);
1104         if (ret)
1105                 return ret;
1106
1107         if (wowlan->any) {
1108                 trans->system_pm_mode = IWL_PLAT_PM_MODE_D0I3;
1109
1110                 if (iwl_mvm_enter_d0i3_on_suspend(mvm)) {
1111                         ret = iwl_mvm_enter_d0i3_sync(mvm);
1112
1113                         if (ret)
1114                                 return ret;
1115                 }
1116
1117                 mutex_lock(&mvm->d0i3_suspend_mutex);
1118                 __set_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1119                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1120
1121                 iwl_trans_d3_suspend(trans, false, false);
1122
1123                 return 0;
1124         }
1125
1126         trans->system_pm_mode = IWL_PLAT_PM_MODE_D3;
1127
1128         return __iwl_mvm_suspend(hw, wowlan, false);
1129 }
1130
1131 /* converted data from the different status responses */
1132 struct iwl_wowlan_status_data {
1133         u16 pattern_number;
1134         u16 qos_seq_ctr[8];
1135         u32 wakeup_reasons;
1136         u32 wake_packet_length;
1137         u32 wake_packet_bufsize;
1138         const u8 *wake_packet;
1139 };
1140
1141 static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1142                                           struct ieee80211_vif *vif,
1143                                           struct iwl_wowlan_status_data *status)
1144 {
1145         struct sk_buff *pkt = NULL;
1146         struct cfg80211_wowlan_wakeup wakeup = {
1147                 .pattern_idx = -1,
1148         };
1149         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1150         u32 reasons = status->wakeup_reasons;
1151
1152         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1153                 wakeup_report = NULL;
1154                 goto report;
1155         }
1156
1157         pm_wakeup_event(mvm->dev, 0);
1158
1159         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1160                 wakeup.magic_pkt = true;
1161
1162         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1163                 wakeup.pattern_idx =
1164                         status->pattern_number;
1165
1166         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1167                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1168                 wakeup.disconnect = true;
1169
1170         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1171                 wakeup.gtk_rekey_failure = true;
1172
1173         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1174                 wakeup.rfkill_release = true;
1175
1176         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1177                 wakeup.eap_identity_req = true;
1178
1179         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1180                 wakeup.four_way_handshake = true;
1181
1182         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1183                 wakeup.tcp_connlost = true;
1184
1185         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1186                 wakeup.tcp_nomoretokens = true;
1187
1188         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1189                 wakeup.tcp_match = true;
1190
1191         if (status->wake_packet_bufsize) {
1192                 int pktsize = status->wake_packet_bufsize;
1193                 int pktlen = status->wake_packet_length;
1194                 const u8 *pktdata = status->wake_packet;
1195                 struct ieee80211_hdr *hdr = (void *)pktdata;
1196                 int truncated = pktlen - pktsize;
1197
1198                 /* this would be a firmware bug */
1199                 if (WARN_ON_ONCE(truncated < 0))
1200                         truncated = 0;
1201
1202                 if (ieee80211_is_data(hdr->frame_control)) {
1203                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1204                         int ivlen = 0, icvlen = 4; /* also FCS */
1205
1206                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1207                         if (!pkt)
1208                                 goto report;
1209
1210                         skb_put_data(pkt, pktdata, hdrlen);
1211                         pktdata += hdrlen;
1212                         pktsize -= hdrlen;
1213
1214                         if (ieee80211_has_protected(hdr->frame_control)) {
1215                                 /*
1216                                  * This is unlocked and using gtk_i(c)vlen,
1217                                  * but since everything is under RTNL still
1218                                  * that's not really a problem - changing
1219                                  * it would be difficult.
1220                                  */
1221                                 if (is_multicast_ether_addr(hdr->addr1)) {
1222                                         ivlen = mvm->gtk_ivlen;
1223                                         icvlen += mvm->gtk_icvlen;
1224                                 } else {
1225                                         ivlen = mvm->ptk_ivlen;
1226                                         icvlen += mvm->ptk_icvlen;
1227                                 }
1228                         }
1229
1230                         /* if truncated, FCS/ICV is (partially) gone */
1231                         if (truncated >= icvlen) {
1232                                 icvlen = 0;
1233                                 truncated -= icvlen;
1234                         } else {
1235                                 icvlen -= truncated;
1236                                 truncated = 0;
1237                         }
1238
1239                         pktsize -= ivlen + icvlen;
1240                         pktdata += ivlen;
1241
1242                         skb_put_data(pkt, pktdata, pktsize);
1243
1244                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1245                                 goto report;
1246                         wakeup.packet = pkt->data;
1247                         wakeup.packet_present_len = pkt->len;
1248                         wakeup.packet_len = pkt->len - truncated;
1249                         wakeup.packet_80211 = false;
1250                 } else {
1251                         int fcslen = 4;
1252
1253                         if (truncated >= 4) {
1254                                 truncated -= 4;
1255                                 fcslen = 0;
1256                         } else {
1257                                 fcslen -= truncated;
1258                                 truncated = 0;
1259                         }
1260                         pktsize -= fcslen;
1261                         wakeup.packet = status->wake_packet;
1262                         wakeup.packet_present_len = pktsize;
1263                         wakeup.packet_len = pktlen - truncated;
1264                         wakeup.packet_80211 = true;
1265                 }
1266         }
1267
1268  report:
1269         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1270         kfree_skb(pkt);
1271 }
1272
1273 static void iwl_mvm_aes_sc_to_seq(struct aes_sc *sc,
1274                                   struct ieee80211_key_seq *seq)
1275 {
1276         u64 pn;
1277
1278         pn = le64_to_cpu(sc->pn);
1279         seq->ccmp.pn[0] = pn >> 40;
1280         seq->ccmp.pn[1] = pn >> 32;
1281         seq->ccmp.pn[2] = pn >> 24;
1282         seq->ccmp.pn[3] = pn >> 16;
1283         seq->ccmp.pn[4] = pn >> 8;
1284         seq->ccmp.pn[5] = pn;
1285 }
1286
1287 static void iwl_mvm_tkip_sc_to_seq(struct tkip_sc *sc,
1288                                    struct ieee80211_key_seq *seq)
1289 {
1290         seq->tkip.iv32 = le32_to_cpu(sc->iv32);
1291         seq->tkip.iv16 = le16_to_cpu(sc->iv16);
1292 }
1293
1294 static void iwl_mvm_set_aes_rx_seq(struct iwl_mvm *mvm, struct aes_sc *scs,
1295                                    struct ieee80211_sta *sta,
1296                                    struct ieee80211_key_conf *key)
1297 {
1298         int tid;
1299
1300         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1301
1302         if (sta && iwl_mvm_has_new_rx_api(mvm)) {
1303                 struct iwl_mvm_sta *mvmsta;
1304                 struct iwl_mvm_key_pn *ptk_pn;
1305
1306                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1307
1308                 ptk_pn = rcu_dereference_protected(mvmsta->ptk_pn[key->keyidx],
1309                                                    lockdep_is_held(&mvm->mutex));
1310                 if (WARN_ON(!ptk_pn))
1311                         return;
1312
1313                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1314                         struct ieee80211_key_seq seq = {};
1315                         int i;
1316
1317                         iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1318                         ieee80211_set_key_rx_seq(key, tid, &seq);
1319                         for (i = 1; i < mvm->trans->num_rx_queues; i++)
1320                                 memcpy(ptk_pn->q[i].pn[tid],
1321                                        seq.ccmp.pn, IEEE80211_CCMP_PN_LEN);
1322                 }
1323         } else {
1324                 for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1325                         struct ieee80211_key_seq seq = {};
1326
1327                         iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1328                         ieee80211_set_key_rx_seq(key, tid, &seq);
1329                 }
1330         }
1331 }
1332
1333 static void iwl_mvm_set_tkip_rx_seq(struct tkip_sc *scs,
1334                                     struct ieee80211_key_conf *key)
1335 {
1336         int tid;
1337
1338         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1339
1340         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1341                 struct ieee80211_key_seq seq = {};
1342
1343                 iwl_mvm_tkip_sc_to_seq(&scs[tid], &seq);
1344                 ieee80211_set_key_rx_seq(key, tid, &seq);
1345         }
1346 }
1347
1348 static void iwl_mvm_set_key_rx_seq(struct iwl_mvm *mvm,
1349                                    struct ieee80211_key_conf *key,
1350                                    struct iwl_wowlan_status *status)
1351 {
1352         union iwl_all_tsc_rsc *rsc = &status->gtk.rsc.all_tsc_rsc;
1353
1354         switch (key->cipher) {
1355         case WLAN_CIPHER_SUITE_CCMP:
1356                 iwl_mvm_set_aes_rx_seq(mvm, rsc->aes.multicast_rsc, NULL, key);
1357                 break;
1358         case WLAN_CIPHER_SUITE_TKIP:
1359                 iwl_mvm_set_tkip_rx_seq(rsc->tkip.multicast_rsc, key);
1360                 break;
1361         default:
1362                 WARN_ON(1);
1363         }
1364 }
1365
1366 struct iwl_mvm_d3_gtk_iter_data {
1367         struct iwl_mvm *mvm;
1368         struct iwl_wowlan_status *status;
1369         void *last_gtk;
1370         u32 cipher;
1371         bool find_phase, unhandled_cipher;
1372         int num_keys;
1373 };
1374
1375 static void iwl_mvm_d3_update_keys(struct ieee80211_hw *hw,
1376                                    struct ieee80211_vif *vif,
1377                                    struct ieee80211_sta *sta,
1378                                    struct ieee80211_key_conf *key,
1379                                    void *_data)
1380 {
1381         struct iwl_mvm_d3_gtk_iter_data *data = _data;
1382
1383         if (data->unhandled_cipher)
1384                 return;
1385
1386         switch (key->cipher) {
1387         case WLAN_CIPHER_SUITE_WEP40:
1388         case WLAN_CIPHER_SUITE_WEP104:
1389                 /* ignore WEP completely, nothing to do */
1390                 return;
1391         case WLAN_CIPHER_SUITE_CCMP:
1392         case WLAN_CIPHER_SUITE_TKIP:
1393                 /* we support these */
1394                 break;
1395         default:
1396                 /* everything else (even CMAC for MFP) - disconnect from AP */
1397                 data->unhandled_cipher = true;
1398                 return;
1399         }
1400
1401         data->num_keys++;
1402
1403         /*
1404          * pairwise key - update sequence counters only;
1405          * note that this assumes no TDLS sessions are active
1406          */
1407         if (sta) {
1408                 struct ieee80211_key_seq seq = {};
1409                 union iwl_all_tsc_rsc *sc = &data->status->gtk.rsc.all_tsc_rsc;
1410
1411                 if (data->find_phase)
1412                         return;
1413
1414                 switch (key->cipher) {
1415                 case WLAN_CIPHER_SUITE_CCMP:
1416                         iwl_mvm_set_aes_rx_seq(data->mvm, sc->aes.unicast_rsc,
1417                                                sta, key);
1418                         atomic64_set(&key->tx_pn, le64_to_cpu(sc->aes.tsc.pn));
1419                         break;
1420                 case WLAN_CIPHER_SUITE_TKIP:
1421                         iwl_mvm_tkip_sc_to_seq(&sc->tkip.tsc, &seq);
1422                         iwl_mvm_set_tkip_rx_seq(sc->tkip.unicast_rsc, key);
1423                         atomic64_set(&key->tx_pn,
1424                                      (u64)seq.tkip.iv16 |
1425                                      ((u64)seq.tkip.iv32 << 16));
1426                         break;
1427                 }
1428
1429                 /* that's it for this key */
1430                 return;
1431         }
1432
1433         if (data->find_phase) {
1434                 data->last_gtk = key;
1435                 data->cipher = key->cipher;
1436                 return;
1437         }
1438
1439         if (data->status->num_of_gtk_rekeys)
1440                 ieee80211_remove_key(key);
1441         else if (data->last_gtk == key)
1442                 iwl_mvm_set_key_rx_seq(data->mvm, key, data->status);
1443 }
1444
1445 static bool iwl_mvm_setup_connection_keep(struct iwl_mvm *mvm,
1446                                           struct ieee80211_vif *vif,
1447                                           struct iwl_wowlan_status *status)
1448 {
1449         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1450         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1451                 .mvm = mvm,
1452                 .status = status,
1453         };
1454         u32 disconnection_reasons =
1455                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1456                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1457
1458         if (!status || !vif->bss_conf.bssid)
1459                 return false;
1460
1461         if (le32_to_cpu(status->wakeup_reasons) & disconnection_reasons)
1462                 return false;
1463
1464         /* find last GTK that we used initially, if any */
1465         gtkdata.find_phase = true;
1466         ieee80211_iter_keys(mvm->hw, vif,
1467                             iwl_mvm_d3_update_keys, &gtkdata);
1468         /* not trying to keep connections with MFP/unhandled ciphers */
1469         if (gtkdata.unhandled_cipher)
1470                 return false;
1471         if (!gtkdata.num_keys)
1472                 goto out;
1473         if (!gtkdata.last_gtk)
1474                 return false;
1475
1476         /*
1477          * invalidate all other GTKs that might still exist and update
1478          * the one that we used
1479          */
1480         gtkdata.find_phase = false;
1481         ieee80211_iter_keys(mvm->hw, vif,
1482                             iwl_mvm_d3_update_keys, &gtkdata);
1483
1484         if (status->num_of_gtk_rekeys) {
1485                 struct ieee80211_key_conf *key;
1486                 struct {
1487                         struct ieee80211_key_conf conf;
1488                         u8 key[32];
1489                 } conf = {
1490                         .conf.cipher = gtkdata.cipher,
1491                         .conf.keyidx = status->gtk.key_index,
1492                 };
1493
1494                 switch (gtkdata.cipher) {
1495                 case WLAN_CIPHER_SUITE_CCMP:
1496                         conf.conf.keylen = WLAN_KEY_LEN_CCMP;
1497                         memcpy(conf.conf.key, status->gtk.decrypt_key,
1498                                WLAN_KEY_LEN_CCMP);
1499                         break;
1500                 case WLAN_CIPHER_SUITE_TKIP:
1501                         conf.conf.keylen = WLAN_KEY_LEN_TKIP;
1502                         memcpy(conf.conf.key, status->gtk.decrypt_key, 16);
1503                         /* leave TX MIC key zeroed, we don't use it anyway */
1504                         memcpy(conf.conf.key +
1505                                NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY,
1506                                status->gtk.tkip_mic_key, 8);
1507                         break;
1508                 }
1509
1510                 key = ieee80211_gtk_rekey_add(vif, &conf.conf);
1511                 if (IS_ERR(key))
1512                         return false;
1513                 iwl_mvm_set_key_rx_seq(mvm, key, status);
1514         }
1515
1516         if (status->num_of_gtk_rekeys) {
1517                 __be64 replay_ctr =
1518                         cpu_to_be64(le64_to_cpu(status->replay_ctr));
1519                 ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
1520                                            (void *)&replay_ctr, GFP_KERNEL);
1521         }
1522
1523 out:
1524         mvmvif->seqno_valid = true;
1525         /* +0x10 because the set API expects next-to-use, not last-used */
1526         mvmvif->seqno = le16_to_cpu(status->non_qos_seq_ctr) + 0x10;
1527
1528         return true;
1529 }
1530
1531 static struct iwl_wowlan_status *
1532 iwl_mvm_get_wakeup_status(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1533 {
1534         u32 base = mvm->error_event_table[0];
1535         struct error_table_start {
1536                 /* cf. struct iwl_error_event_table */
1537                 u32 valid;
1538                 u32 error_id;
1539         } err_info;
1540         struct iwl_host_cmd cmd = {
1541                 .id = WOWLAN_GET_STATUSES,
1542                 .flags = CMD_WANT_SKB,
1543         };
1544         struct iwl_wowlan_status *status, *fw_status;
1545         int ret, len, status_size;
1546
1547         iwl_trans_read_mem_bytes(mvm->trans, base,
1548                                  &err_info, sizeof(err_info));
1549
1550         if (err_info.valid) {
1551                 IWL_INFO(mvm, "error table is valid (%d) with error (%d)\n",
1552                          err_info.valid, err_info.error_id);
1553                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1554                         struct cfg80211_wowlan_wakeup wakeup = {
1555                                 .rfkill_release = true,
1556                         };
1557                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1558                                                        GFP_KERNEL);
1559                 }
1560                 return ERR_PTR(-EIO);
1561         }
1562
1563         /* only for tracing for now */
1564         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, 0, 0, NULL);
1565         if (ret)
1566                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1567
1568         ret = iwl_mvm_send_cmd(mvm, &cmd);
1569         if (ret) {
1570                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1571                 return ERR_PTR(ret);
1572         }
1573
1574         status_size = sizeof(*fw_status);
1575
1576         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1577         if (len < status_size) {
1578                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1579                 fw_status = ERR_PTR(-EIO);
1580                 goto out_free_resp;
1581         }
1582
1583         status = (void *)cmd.resp_pkt->data;
1584         if (len != (status_size +
1585                     ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4))) {
1586                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1587                 fw_status = ERR_PTR(-EIO);
1588                 goto out_free_resp;
1589         }
1590
1591         fw_status = kmemdup(status, len, GFP_KERNEL);
1592
1593 out_free_resp:
1594         iwl_free_resp(&cmd);
1595         return fw_status;
1596 }
1597
1598 /* releases the MVM mutex */
1599 static bool iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1600                                          struct ieee80211_vif *vif)
1601 {
1602         struct iwl_wowlan_status_data status;
1603         struct iwl_wowlan_status *fw_status;
1604         int i;
1605         bool keep;
1606         struct iwl_mvm_sta *mvm_ap_sta;
1607
1608         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1609         if (IS_ERR_OR_NULL(fw_status))
1610                 goto out_unlock;
1611
1612         status.pattern_number = le16_to_cpu(fw_status->pattern_number);
1613         for (i = 0; i < 8; i++)
1614                 status.qos_seq_ctr[i] =
1615                         le16_to_cpu(fw_status->qos_seq_ctr[i]);
1616         status.wakeup_reasons = le32_to_cpu(fw_status->wakeup_reasons);
1617         status.wake_packet_length =
1618                 le32_to_cpu(fw_status->wake_packet_length);
1619         status.wake_packet_bufsize =
1620                 le32_to_cpu(fw_status->wake_packet_bufsize);
1621         status.wake_packet = fw_status->wake_packet;
1622
1623         /* still at hard-coded place 0 for D3 image */
1624         mvm_ap_sta = iwl_mvm_sta_from_staid_protected(mvm, 0);
1625         if (!mvm_ap_sta)
1626                 goto out_free;
1627
1628         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1629                 u16 seq = status.qos_seq_ctr[i];
1630                 /* firmware stores last-used value, we store next value */
1631                 seq += 0x10;
1632                 mvm_ap_sta->tid_data[i].seq_number = seq;
1633         }
1634
1635         /* now we have all the data we need, unlock to avoid mac80211 issues */
1636         mutex_unlock(&mvm->mutex);
1637
1638         iwl_mvm_report_wakeup_reasons(mvm, vif, &status);
1639
1640         keep = iwl_mvm_setup_connection_keep(mvm, vif, fw_status);
1641
1642         kfree(fw_status);
1643         return keep;
1644
1645 out_free:
1646         kfree(fw_status);
1647 out_unlock:
1648         mutex_unlock(&mvm->mutex);
1649         return false;
1650 }
1651
1652 void iwl_mvm_d0i3_update_keys(struct iwl_mvm *mvm,
1653                               struct ieee80211_vif *vif,
1654                               struct iwl_wowlan_status *status)
1655 {
1656         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1657                 .mvm = mvm,
1658                 .status = status,
1659         };
1660
1661         /*
1662          * rekey handling requires taking locks that can't be taken now.
1663          * however, d0i3 doesn't offload rekey, so we're fine.
1664          */
1665         if (WARN_ON_ONCE(status->num_of_gtk_rekeys))
1666                 return;
1667
1668         /* find last GTK that we used initially, if any */
1669         gtkdata.find_phase = true;
1670         iwl_mvm_iter_d0i3_ap_keys(mvm, vif, iwl_mvm_d3_update_keys, &gtkdata);
1671
1672         gtkdata.find_phase = false;
1673         iwl_mvm_iter_d0i3_ap_keys(mvm, vif, iwl_mvm_d3_update_keys, &gtkdata);
1674 }
1675
1676 struct iwl_mvm_nd_query_results {
1677         u32 matched_profiles;
1678         struct iwl_scan_offload_profile_match matches[IWL_SCAN_MAX_PROFILES];
1679 };
1680
1681 static int
1682 iwl_mvm_netdetect_query_results(struct iwl_mvm *mvm,
1683                                 struct iwl_mvm_nd_query_results *results)
1684 {
1685         struct iwl_scan_offload_profiles_query *query;
1686         struct iwl_host_cmd cmd = {
1687                 .id = SCAN_OFFLOAD_PROFILES_QUERY_CMD,
1688                 .flags = CMD_WANT_SKB,
1689         };
1690         int ret, len;
1691
1692         ret = iwl_mvm_send_cmd(mvm, &cmd);
1693         if (ret) {
1694                 IWL_ERR(mvm, "failed to query matched profiles (%d)\n", ret);
1695                 return ret;
1696         }
1697
1698         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1699         if (len < sizeof(*query)) {
1700                 IWL_ERR(mvm, "Invalid scan offload profiles query response!\n");
1701                 ret = -EIO;
1702                 goto out_free_resp;
1703         }
1704
1705         query = (void *)cmd.resp_pkt->data;
1706
1707         results->matched_profiles = le32_to_cpu(query->matched_profiles);
1708         memcpy(results->matches, query->matches, sizeof(results->matches));
1709
1710 #ifdef CONFIG_IWLWIFI_DEBUGFS
1711         mvm->last_netdetect_scans = le32_to_cpu(query->n_scans_done);
1712 #endif
1713
1714 out_free_resp:
1715         iwl_free_resp(&cmd);
1716         return ret;
1717 }
1718
1719 static void iwl_mvm_query_netdetect_reasons(struct iwl_mvm *mvm,
1720                                             struct ieee80211_vif *vif)
1721 {
1722         struct cfg80211_wowlan_nd_info *net_detect = NULL;
1723         struct cfg80211_wowlan_wakeup wakeup = {
1724                 .pattern_idx = -1,
1725         };
1726         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1727         struct iwl_mvm_nd_query_results query;
1728         struct iwl_wowlan_status *fw_status;
1729         unsigned long matched_profiles;
1730         u32 reasons = 0;
1731         int i, j, n_matches, ret;
1732
1733         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1734         if (!IS_ERR_OR_NULL(fw_status)) {
1735                 reasons = le32_to_cpu(fw_status->wakeup_reasons);
1736                 kfree(fw_status);
1737         }
1738
1739         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1740                 wakeup.rfkill_release = true;
1741
1742         if (reasons != IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS)
1743                 goto out;
1744
1745         ret = iwl_mvm_netdetect_query_results(mvm, &query);
1746         if (ret || !query.matched_profiles) {
1747                 wakeup_report = NULL;
1748                 goto out;
1749         }
1750
1751         matched_profiles = query.matched_profiles;
1752         if (mvm->n_nd_match_sets) {
1753                 n_matches = hweight_long(matched_profiles);
1754         } else {
1755                 IWL_ERR(mvm, "no net detect match information available\n");
1756                 n_matches = 0;
1757         }
1758
1759         net_detect = kzalloc(sizeof(*net_detect) +
1760                              (n_matches * sizeof(net_detect->matches[0])),
1761                              GFP_KERNEL);
1762         if (!net_detect || !n_matches)
1763                 goto out_report_nd;
1764
1765         for_each_set_bit(i, &matched_profiles, mvm->n_nd_match_sets) {
1766                 struct iwl_scan_offload_profile_match *fw_match;
1767                 struct cfg80211_wowlan_nd_match *match;
1768                 int idx, n_channels = 0;
1769
1770                 fw_match = &query.matches[i];
1771
1772                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN; j++)
1773                         n_channels += hweight8(fw_match->matching_channels[j]);
1774
1775                 match = kzalloc(sizeof(*match) +
1776                                 (n_channels * sizeof(*match->channels)),
1777                                 GFP_KERNEL);
1778                 if (!match)
1779                         goto out_report_nd;
1780
1781                 net_detect->matches[net_detect->n_matches++] = match;
1782
1783                 /* We inverted the order of the SSIDs in the scan
1784                  * request, so invert the index here.
1785                  */
1786                 idx = mvm->n_nd_match_sets - i - 1;
1787                 match->ssid.ssid_len = mvm->nd_match_sets[idx].ssid.ssid_len;
1788                 memcpy(match->ssid.ssid, mvm->nd_match_sets[idx].ssid.ssid,
1789                        match->ssid.ssid_len);
1790
1791                 if (mvm->n_nd_channels < n_channels)
1792                         continue;
1793
1794                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN * 8; j++)
1795                         if (fw_match->matching_channels[j / 8] & (BIT(j % 8)))
1796                                 match->channels[match->n_channels++] =
1797                                         mvm->nd_channels[j]->center_freq;
1798         }
1799
1800 out_report_nd:
1801         wakeup.net_detect = net_detect;
1802 out:
1803         iwl_mvm_free_nd(mvm);
1804
1805         mutex_unlock(&mvm->mutex);
1806         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1807
1808         if (net_detect) {
1809                 for (i = 0; i < net_detect->n_matches; i++)
1810                         kfree(net_detect->matches[i]);
1811                 kfree(net_detect);
1812         }
1813 }
1814
1815 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
1816 {
1817 #ifdef CONFIG_IWLWIFI_DEBUGFS
1818         const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
1819         u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
1820         u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1821
1822         if (!mvm->store_d3_resume_sram)
1823                 return;
1824
1825         if (!mvm->d3_resume_sram) {
1826                 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
1827                 if (!mvm->d3_resume_sram)
1828                         return;
1829         }
1830
1831         iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
1832 #endif
1833 }
1834
1835 static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac,
1836                                        struct ieee80211_vif *vif)
1837 {
1838         /* skip the one we keep connection on */
1839         if (data == vif)
1840                 return;
1841
1842         if (vif->type == NL80211_IFTYPE_STATION)
1843                 ieee80211_resume_disconnect(vif);
1844 }
1845
1846 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
1847 {
1848         struct ieee80211_vif *vif = NULL;
1849         int ret = 1;
1850         enum iwl_d3_status d3_status;
1851         bool keep = false;
1852         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1853                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1854         bool d0i3_first = fw_has_capa(&mvm->fw->ucode_capa,
1855                                       IWL_UCODE_TLV_CAPA_D0I3_END_FIRST);
1856
1857         mutex_lock(&mvm->mutex);
1858
1859         /* get the BSS vif pointer again */
1860         vif = iwl_mvm_get_bss_vif(mvm);
1861         if (IS_ERR_OR_NULL(vif))
1862                 goto err;
1863
1864         ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test, !unified_image);
1865         if (ret)
1866                 goto err;
1867
1868         if (d3_status != IWL_D3_STATUS_ALIVE) {
1869                 IWL_INFO(mvm, "Device was reset during suspend\n");
1870                 goto err;
1871         }
1872
1873         /* query SRAM first in case we want event logging */
1874         iwl_mvm_read_d3_sram(mvm);
1875
1876         if (d0i3_first) {
1877                 ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, 0, 0, NULL);
1878                 if (ret < 0) {
1879                         IWL_ERR(mvm, "Failed to send D0I3_END_CMD first (%d)\n",
1880                                 ret);
1881                         goto err;
1882                 }
1883         }
1884
1885         /*
1886          * Query the current location and source from the D3 firmware so we
1887          * can play it back when we re-intiailize the D0 firmware
1888          */
1889         iwl_mvm_update_changed_regdom(mvm);
1890
1891         if (!unified_image)
1892                 /*  Re-configure default SAR profile */
1893                 iwl_mvm_sar_select_profile(mvm, 1, 1);
1894
1895         if (mvm->net_detect) {
1896                 /* If this is a non-unified image, we restart the FW,
1897                  * so no need to stop the netdetect scan.  If that
1898                  * fails, continue and try to get the wake-up reasons,
1899                  * but trigger a HW restart by keeping a failure code
1900                  * in ret.
1901                  */
1902                 if (unified_image)
1903                         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_NETDETECT,
1904                                                 false);
1905
1906                 iwl_mvm_query_netdetect_reasons(mvm, vif);
1907                 /* has unlocked the mutex, so skip that */
1908                 goto out;
1909         } else {
1910                 keep = iwl_mvm_query_wakeup_reasons(mvm, vif);
1911 #ifdef CONFIG_IWLWIFI_DEBUGFS
1912                 if (keep)
1913                         mvm->keep_vif = vif;
1914 #endif
1915                 /* has unlocked the mutex, so skip that */
1916                 goto out_iterate;
1917         }
1918
1919 err:
1920         iwl_mvm_free_nd(mvm);
1921         mutex_unlock(&mvm->mutex);
1922
1923 out_iterate:
1924         if (!test)
1925                 ieee80211_iterate_active_interfaces_rtnl(mvm->hw,
1926                         IEEE80211_IFACE_ITER_NORMAL,
1927                         iwl_mvm_d3_disconnect_iter, keep ? vif : NULL);
1928
1929 out:
1930         /* no need to reset the device in unified images, if successful */
1931         if (unified_image && !ret) {
1932                 /* nothing else to do if we already sent D0I3_END_CMD */
1933                 if (d0i3_first)
1934                         return 0;
1935
1936                 ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, 0, 0, NULL);
1937                 if (!ret)
1938                         return 0;
1939         }
1940
1941         /*
1942          * Reconfigure the device in one of the following cases:
1943          * 1. We are not using a unified image
1944          * 2. We are using a unified image but had an error while exiting D3
1945          */
1946         set_bit(IWL_MVM_STATUS_HW_RESTART_REQUESTED, &mvm->status);
1947         set_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status);
1948         /*
1949          * When switching images we return 1, which causes mac80211
1950          * to do a reconfig with IEEE80211_RECONFIG_TYPE_RESTART.
1951          * This type of reconfig calls iwl_mvm_restart_complete(),
1952          * where we unref the IWL_MVM_REF_UCODE_DOWN, so we need
1953          * to take the reference here.
1954          */
1955         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1956
1957         return 1;
1958 }
1959
1960 static int iwl_mvm_resume_d3(struct iwl_mvm *mvm)
1961 {
1962         iwl_trans_resume(mvm->trans);
1963
1964         return __iwl_mvm_resume(mvm, false);
1965 }
1966
1967 static int iwl_mvm_resume_d0i3(struct iwl_mvm *mvm)
1968 {
1969         bool exit_now;
1970         enum iwl_d3_status d3_status;
1971         struct iwl_trans *trans = mvm->trans;
1972
1973         iwl_trans_d3_resume(trans, &d3_status, false, false);
1974
1975         /*
1976          * make sure to clear D0I3_DEFER_WAKEUP before
1977          * calling iwl_trans_resume(), which might wait
1978          * for d0i3 exit completion.
1979          */
1980         mutex_lock(&mvm->d0i3_suspend_mutex);
1981         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1982         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
1983                                         &mvm->d0i3_suspend_flags);
1984         mutex_unlock(&mvm->d0i3_suspend_mutex);
1985         if (exit_now) {
1986                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
1987                 _iwl_mvm_exit_d0i3(mvm);
1988         }
1989
1990         iwl_trans_resume(trans);
1991
1992         if (iwl_mvm_enter_d0i3_on_suspend(mvm)) {
1993                 int ret = iwl_mvm_exit_d0i3(mvm->hw->priv);
1994
1995                 if (ret)
1996                         return ret;
1997                 /*
1998                  * d0i3 exit will be deferred until reconfig_complete.
1999                  * make sure there we are out of d0i3.
2000                  */
2001         }
2002         return 0;
2003 }
2004
2005 int iwl_mvm_resume(struct ieee80211_hw *hw)
2006 {
2007         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2008         int ret;
2009
2010         if (mvm->trans->system_pm_mode == IWL_PLAT_PM_MODE_D0I3)
2011                 ret = iwl_mvm_resume_d0i3(mvm);
2012         else
2013                 ret = iwl_mvm_resume_d3(mvm);
2014
2015         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
2016
2017         iwl_fw_runtime_resume(&mvm->fwrt);
2018
2019         return ret;
2020 }
2021
2022 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
2023 {
2024         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2025
2026         device_set_wakeup_enable(mvm->trans->dev, enabled);
2027 }
2028
2029 #ifdef CONFIG_IWLWIFI_DEBUGFS
2030 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
2031 {
2032         struct iwl_mvm *mvm = inode->i_private;
2033         int err;
2034
2035         if (mvm->d3_test_active)
2036                 return -EBUSY;
2037
2038         file->private_data = inode->i_private;
2039
2040         ieee80211_stop_queues(mvm->hw);
2041         synchronize_net();
2042
2043         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_D3;
2044
2045         iwl_fw_runtime_suspend(&mvm->fwrt);
2046
2047         /* start pseudo D3 */
2048         rtnl_lock();
2049         err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
2050         rtnl_unlock();
2051         if (err > 0)
2052                 err = -EINVAL;
2053         if (err) {
2054                 ieee80211_wake_queues(mvm->hw);
2055                 return err;
2056         }
2057         mvm->d3_test_active = true;
2058         mvm->keep_vif = NULL;
2059         return 0;
2060 }
2061
2062 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
2063                                     size_t count, loff_t *ppos)
2064 {
2065         struct iwl_mvm *mvm = file->private_data;
2066         u32 pme_asserted;
2067
2068         while (true) {
2069                 /* read pme_ptr if available */
2070                 if (mvm->d3_test_pme_ptr) {
2071                         pme_asserted = iwl_trans_read_mem32(mvm->trans,
2072                                                 mvm->d3_test_pme_ptr);
2073                         if (pme_asserted)
2074                                 break;
2075                 }
2076
2077                 if (msleep_interruptible(100))
2078                         break;
2079         }
2080
2081         return 0;
2082 }
2083
2084 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
2085                                               struct ieee80211_vif *vif)
2086 {
2087         /* skip the one we keep connection on */
2088         if (_data == vif)
2089                 return;
2090
2091         if (vif->type == NL80211_IFTYPE_STATION)
2092                 ieee80211_connection_loss(vif);
2093 }
2094
2095 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
2096 {
2097         struct iwl_mvm *mvm = inode->i_private;
2098         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
2099                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
2100
2101         mvm->d3_test_active = false;
2102
2103         rtnl_lock();
2104         __iwl_mvm_resume(mvm, true);
2105         rtnl_unlock();
2106
2107         iwl_fw_runtime_resume(&mvm->fwrt);
2108
2109         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
2110
2111         iwl_abort_notification_waits(&mvm->notif_wait);
2112         if (!unified_image) {
2113                 int remaining_time = 10;
2114
2115                 ieee80211_restart_hw(mvm->hw);
2116
2117                 /* wait for restart and disconnect all interfaces */
2118                 while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2119                        remaining_time > 0) {
2120                         remaining_time--;
2121                         msleep(1000);
2122                 }
2123
2124                 if (remaining_time == 0)
2125                         IWL_ERR(mvm, "Timed out waiting for HW restart!\n");
2126         }
2127
2128         ieee80211_iterate_active_interfaces_atomic(
2129                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2130                 iwl_mvm_d3_test_disconn_work_iter, mvm->keep_vif);
2131
2132         ieee80211_wake_queues(mvm->hw);
2133
2134         return 0;
2135 }
2136
2137 const struct file_operations iwl_dbgfs_d3_test_ops = {
2138         .llseek = no_llseek,
2139         .open = iwl_mvm_d3_test_open,
2140         .read = iwl_mvm_d3_test_read,
2141         .release = iwl_mvm_d3_test_release,
2142 };
2143 #endif