drivers/net/wireless/iwlwifi/mvm/d3.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
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  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
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  20  * along with this program; if not, write to the Free Software
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  22  * USA
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  26  *
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  28  *  Intel Linux Wireless <ilw@linux.intel.com>
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  30  *
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  32  *
  33  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
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  41  *    notice, this list of conditions and the following disclaimer.
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  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
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  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 <net/cfg80211.h>
  65 #include <net/ipv6.h>
  66 #include "iwl-modparams.h"
  67 #include "fw-api.h"
  68 #include "mvm.h"
  69
  70 void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw,
  71                             struct ieee80211_vif *vif,
  72                             struct cfg80211_gtk_rekey_data *data)
  73 {
  74         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
  75         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  76
  77         if (iwlwifi_mod_params.sw_crypto)
  78                 return;
  79
  80         mutex_lock(&mvm->mutex);
  81
  82         memcpy(mvmvif->rekey_data.kek, data->kek, NL80211_KEK_LEN);
  83         memcpy(mvmvif->rekey_data.kck, data->kck, NL80211_KCK_LEN);
  84         mvmvif->rekey_data.replay_ctr =
  85                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
  86         mvmvif->rekey_data.valid = true;
  87
  88         mutex_unlock(&mvm->mutex);
  89 }
  90
  91 #if IS_ENABLED(CONFIG_IPV6)
  92 void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
  93                               struct ieee80211_vif *vif,
  94                               struct inet6_dev *idev)
  95 {
  96         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  97         struct inet6_ifaddr *ifa;
  98         int idx = 0;
  99
 100         read_lock_bh(&idev->lock);
 101         list_for_each_entry(ifa, &idev->addr_list, if_list) {
 102                 mvmvif->target_ipv6_addrs[idx] = ifa->addr;
 103                 idx++;
 104                 if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS)
 105                         break;
 106         }
 107         read_unlock_bh(&idev->lock);
 108
 109         mvmvif->num_target_ipv6_addrs = idx;
 110 }
 111 #endif
 112
 113 void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
 114                                      struct ieee80211_vif *vif, int idx)
 115 {
 116         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 117
 118         mvmvif->tx_key_idx = idx;
 119 }
 120
 121 static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out)
 122 {
 123         int i;
 124
 125         for (i = 0; i < IWL_P1K_SIZE; i++)
 126                 out[i] = cpu_to_le16(p1k[i]);
 127 }
 128
 129 struct wowlan_key_data {
 130         struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc;
 131         struct iwl_wowlan_tkip_params_cmd *tkip;
 132         bool error, use_rsc_tsc, use_tkip;
 133         int gtk_key_idx;
 134 };
 135
 136 static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
 137                                         struct ieee80211_vif *vif,
 138                                         struct ieee80211_sta *sta,
 139                                         struct ieee80211_key_conf *key,
 140                                         void *_data)
 141 {
 142         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 143         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 144         struct wowlan_key_data *data = _data;
 145         struct aes_sc *aes_sc, *aes_tx_sc = NULL;
 146         struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
 147         struct iwl_p1k_cache *rx_p1ks;
 148         u8 *rx_mic_key;
 149         struct ieee80211_key_seq seq;
 150         u32 cur_rx_iv32 = 0;
 151         u16 p1k[IWL_P1K_SIZE];
 152         int ret, i;
 153
 154         mutex_lock(&mvm->mutex);
 155
 156         switch (key->cipher) {
 157         case WLAN_CIPHER_SUITE_WEP40:
 158         case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */
 159                 struct {
 160                         struct iwl_mvm_wep_key_cmd wep_key_cmd;
 161                         struct iwl_mvm_wep_key wep_key;
 162                 } __packed wkc = {
 163                         .wep_key_cmd.mac_id_n_color =
 164                                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 165                                                                 mvmvif->color)),
 166                         .wep_key_cmd.num_keys = 1,
 167                         /* firmware sets STA_KEY_FLG_WEP_13BYTES */
 168                         .wep_key_cmd.decryption_type = STA_KEY_FLG_WEP,
 169                         .wep_key.key_index = key->keyidx,
 170                         .wep_key.key_size = key->keylen,
 171                 };
 172
 173                 /*
 174                  * This will fail -- the key functions don't set support
 175                  * pairwise WEP keys. However, that's better than silently
 176                  * failing WoWLAN. Or maybe not?
 177                  */
 178                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 179                         break;
 180
 181                 memcpy(&wkc.wep_key.key[3], key->key, key->keylen);
 182                 if (key->keyidx == mvmvif->tx_key_idx) {
 183                         /* TX key must be at offset 0 */
 184                         wkc.wep_key.key_offset = 0;
 185                 } else {
 186                         /* others start at 1 */
 187                         data->gtk_key_idx++;
 188                         wkc.wep_key.key_offset = data->gtk_key_idx;
 189                 }
 190
 191                 ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, CMD_SYNC,
 192                                            sizeof(wkc), &wkc);
 193                 data->error = ret != 0;
 194
 195                 /* don't upload key again */
 196                 goto out_unlock;
 197         }
 198         default:
 199                 data->error = true;
 200                 goto out_unlock;
 201         case WLAN_CIPHER_SUITE_AES_CMAC:
 202                 /*
 203                  * Ignore CMAC keys -- the WoWLAN firmware doesn't support them
 204                  * but we also shouldn't abort suspend due to that. It does have
 205                  * support for the IGTK key renewal, but doesn't really use the
 206                  * IGTK for anything. This means we could spuriously wake up or
 207                  * be deauthenticated, but that was considered acceptable.
 208                  */
 209                 goto out_unlock;
 210         case WLAN_CIPHER_SUITE_TKIP:
 211                 if (sta) {
 212                         tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
 213                         tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
 214
 215                         rx_p1ks = data->tkip->rx_uni;
 216
 217                         ieee80211_get_key_tx_seq(key, &seq);
 218                         tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
 219                         tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
 220
 221                         ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
 222                         iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k);
 223
 224                         memcpy(data->tkip->mic_keys.tx,
 225                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
 226                                IWL_MIC_KEY_SIZE);
 227
 228                         rx_mic_key = data->tkip->mic_keys.rx_unicast;
 229                 } else {
 230                         tkip_sc =
 231                                 data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
 232                         rx_p1ks = data->tkip->rx_multi;
 233                         rx_mic_key = data->tkip->mic_keys.rx_mcast;
 234                 }
 235
 236                 /*
 237                  * For non-QoS this relies on the fact that both the uCode and
 238                  * mac80211 use TID 0 (as they need to to avoid replay attacks)
 239                  * for checking the IV in the frames.
 240                  */
 241                 for (i = 0; i < IWL_NUM_RSC; i++) {
 242                         ieee80211_get_key_rx_seq(key, i, &seq);
 243                         tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
 244                         tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
 245                         /* wrapping isn't allowed, AP must rekey */
 246                         if (seq.tkip.iv32 > cur_rx_iv32)
 247                                 cur_rx_iv32 = seq.tkip.iv32;
 248                 }
 249
 250                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 251                                           cur_rx_iv32, p1k);
 252                 iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k);
 253                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 254                                           cur_rx_iv32 + 1, p1k);
 255                 iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k);
 256
 257                 memcpy(rx_mic_key,
 258                        &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
 259                        IWL_MIC_KEY_SIZE);
 260
 261                 data->use_tkip = true;
 262                 data->use_rsc_tsc = true;
 263                 break;
 264         case WLAN_CIPHER_SUITE_CCMP:
 265                 if (sta) {
 266                         u8 *pn = seq.ccmp.pn;
 267
 268                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
 269                         aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
 270
 271                         ieee80211_get_key_tx_seq(key, &seq);
 272                         aes_tx_sc->pn = cpu_to_le64((u64)pn[5] |
 273                                                     ((u64)pn[4] << 8) |
 274                                                     ((u64)pn[3] << 16) |
 275                                                     ((u64)pn[2] << 24) |
 276                                                     ((u64)pn[1] << 32) |
 277                                                     ((u64)pn[0] << 40));
 278                 } else {
 279                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
 280                 }
 281
 282                 /*
 283                  * For non-QoS this relies on the fact that both the uCode and
 284                  * mac80211 use TID 0 for checking the IV in the frames.
 285                  */
 286                 for (i = 0; i < IWL_NUM_RSC; i++) {
 287                         u8 *pn = seq.ccmp.pn;
 288
 289                         ieee80211_get_key_rx_seq(key, i, &seq);
 290                         aes_sc->pn = cpu_to_le64((u64)pn[5] |
 291                                                  ((u64)pn[4] << 8) |
 292                                                  ((u64)pn[3] << 16) |
 293                                                  ((u64)pn[2] << 24) |
 294                                                  ((u64)pn[1] << 32) |
 295                                                  ((u64)pn[0] << 40));
 296                 }
 297                 data->use_rsc_tsc = true;
 298                 break;
 299         }
 300
 301         /*
 302          * The D3 firmware hardcodes the key offset 0 as the key it uses
 303          * to transmit packets to the AP, i.e. the PTK.
 304          */
 305         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
 306                 key->hw_key_idx = 0;
 307         } else {
 308                 data->gtk_key_idx++;
 309                 key->hw_key_idx = data->gtk_key_idx;
 310         }
 311
 312         ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, true);
 313         data->error = ret != 0;
 314 out_unlock:
 315         mutex_unlock(&mvm->mutex);
 316 }
 317
 318 static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
 319                                  struct cfg80211_wowlan *wowlan)
 320 {
 321         struct iwl_wowlan_patterns_cmd *pattern_cmd;
 322         struct iwl_host_cmd cmd = {
 323                 .id = WOWLAN_PATTERNS,
 324                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 325                 .flags = CMD_SYNC,
 326         };
 327         int i, err;
 328
 329         if (!wowlan->n_patterns)
 330                 return 0;
 331
 332         cmd.len[0] = sizeof(*pattern_cmd) +
 333                 wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern);
 334
 335         pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
 336         if (!pattern_cmd)
 337                 return -ENOMEM;
 338
 339         pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
 340
 341         for (i = 0; i < wowlan->n_patterns; i++) {
 342                 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
 343
 344                 memcpy(&pattern_cmd->patterns[i].mask,
 345                        wowlan->patterns[i].mask, mask_len);
 346                 memcpy(&pattern_cmd->patterns[i].pattern,
 347                        wowlan->patterns[i].pattern,
 348                        wowlan->patterns[i].pattern_len);
 349                 pattern_cmd->patterns[i].mask_size = mask_len;
 350                 pattern_cmd->patterns[i].pattern_size =
 351                         wowlan->patterns[i].pattern_len;
 352         }
 353
 354         cmd.data[0] = pattern_cmd;
 355         err = iwl_mvm_send_cmd(mvm, &cmd);
 356         kfree(pattern_cmd);
 357         return err;
 358 }
 359
 360 static int iwl_mvm_send_proto_offload(struct iwl_mvm *mvm,
 361                                       struct ieee80211_vif *vif)
 362 {
 363         struct iwl_proto_offload_cmd cmd = {};
 364 #if IS_ENABLED(CONFIG_IPV6)
 365         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 366         int i;
 367
 368         if (mvmvif->num_target_ipv6_addrs) {
 369                 cmd.enabled |= cpu_to_le32(IWL_D3_PROTO_OFFLOAD_NS);
 370                 memcpy(cmd.ndp_mac_addr, vif->addr, ETH_ALEN);
 371         }
 372
 373         BUILD_BUG_ON(sizeof(cmd.target_ipv6_addr[i]) !=
 374                      sizeof(mvmvif->target_ipv6_addrs[i]));
 375
 376         for (i = 0; i < mvmvif->num_target_ipv6_addrs; i++)
 377                 memcpy(cmd.target_ipv6_addr[i],
 378                        &mvmvif->target_ipv6_addrs[i],
 379                        sizeof(cmd.target_ipv6_addr[i]));
 380 #endif
 381
 382         if (vif->bss_conf.arp_addr_cnt) {
 383                 cmd.enabled |= cpu_to_le32(IWL_D3_PROTO_OFFLOAD_ARP);
 384                 cmd.host_ipv4_addr = vif->bss_conf.arp_addr_list[0];
 385                 memcpy(cmd.arp_mac_addr, vif->addr, ETH_ALEN);
 386         }
 387
 388         if (!cmd.enabled)
 389                 return 0;
 390
 391         return iwl_mvm_send_cmd_pdu(mvm, PROT_OFFLOAD_CONFIG_CMD, CMD_SYNC,
 392                                     sizeof(cmd), &cmd);
 393 }
 394
 395 struct iwl_d3_iter_data {
 396         struct iwl_mvm *mvm;
 397         struct ieee80211_vif *vif;
 398         bool error;
 399 };
 400
 401 static void iwl_mvm_d3_iface_iterator(void *_data, u8 *mac,
 402                                       struct ieee80211_vif *vif)
 403 {
 404         struct iwl_d3_iter_data *data = _data;
 405         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 406
 407         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 408                 return;
 409
 410         if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
 411                 return;
 412
 413         if (data->vif) {
 414                 IWL_ERR(data->mvm, "More than one managed interface active!\n");
 415                 data->error = true;
 416                 return;
 417         }
 418
 419         data->vif = vif;
 420 }
 421
 422 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 423                                 struct ieee80211_sta *ap_sta)
 424 {
 425         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 426         struct ieee80211_chanctx_conf *ctx;
 427         u8 chains_static, chains_dynamic;
 428         struct cfg80211_chan_def chandef;
 429         int ret, i;
 430         struct iwl_binding_cmd binding_cmd = {};
 431         struct iwl_time_quota_cmd quota_cmd = {};
 432         u32 status;
 433
 434         /* add back the PHY */
 435         if (WARN_ON(!mvmvif->phy_ctxt))
 436                 return -EINVAL;
 437
 438         rcu_read_lock();
 439         ctx = rcu_dereference(vif->chanctx_conf);
 440         if (WARN_ON(!ctx)) {
 441                 rcu_read_unlock();
 442                 return -EINVAL;
 443         }
 444         chandef = ctx->def;
 445         chains_static = ctx->rx_chains_static;
 446         chains_dynamic = ctx->rx_chains_dynamic;
 447         rcu_read_unlock();
 448
 449         ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
 450                                    chains_static, chains_dynamic);
 451         if (ret)
 452                 return ret;
 453
 454         /* add back the MAC */
 455         mvmvif->uploaded = false;
 456
 457         if (WARN_ON(!vif->bss_conf.assoc))
 458                 return -EINVAL;
 459         /* hack */
 460         vif->bss_conf.assoc = false;
 461         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 462         vif->bss_conf.assoc = true;
 463         if (ret)
 464                 return ret;
 465
 466         /* add back binding - XXX refactor? */
 467         binding_cmd.id_and_color =
 468                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 469                                                 mvmvif->phy_ctxt->color));
 470         binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
 471         binding_cmd.phy =
 472                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 473                                                 mvmvif->phy_ctxt->color));
 474         binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 475                                                               mvmvif->color));
 476         for (i = 1; i < MAX_MACS_IN_BINDING; i++)
 477                 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
 478
 479         status = 0;
 480         ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
 481                                           sizeof(binding_cmd), &binding_cmd,
 482                                           &status);
 483         if (ret) {
 484                 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
 485                 return ret;
 486         }
 487
 488         if (status) {
 489                 IWL_ERR(mvm, "Binding command failed: %u\n", status);
 490                 return -EIO;
 491         }
 492
 493         ret = iwl_mvm_sta_add_to_fw(mvm, ap_sta);
 494         if (ret)
 495                 return ret;
 496         rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
 497
 498         ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
 499         if (ret)
 500                 return ret;
 501
 502         /* and some quota */
 503         quota_cmd.quotas[0].id_and_color =
 504                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 505                                                 mvmvif->phy_ctxt->color));
 506         quota_cmd.quotas[0].quota = cpu_to_le32(100);
 507         quota_cmd.quotas[0].max_duration = cpu_to_le32(1000);
 508
 509         for (i = 1; i < MAX_BINDINGS; i++)
 510                 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 511
 512         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, CMD_SYNC,
 513                                    sizeof(quota_cmd), &quota_cmd);
 514         if (ret)
 515                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 516
 517         return 0;
 518 }
 519
 520 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
 521 {
 522         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 523         struct iwl_d3_iter_data suspend_iter_data = {
 524                 .mvm = mvm,
 525         };
 526         struct ieee80211_vif *vif;
 527         struct iwl_mvm_vif *mvmvif;
 528         struct ieee80211_sta *ap_sta;
 529         struct iwl_mvm_sta *mvm_ap_sta;
 530         struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
 531         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 532         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 533         struct iwl_d3_manager_config d3_cfg_cmd = {};
 534         struct wowlan_key_data key_data = {
 535                 .use_rsc_tsc = false,
 536                 .tkip = &tkip_cmd,
 537                 .use_tkip = false,
 538         };
 539         int ret, i;
 540         u16 seq;
 541         u8 old_aux_sta_id, old_ap_sta_id = IWL_MVM_STATION_COUNT;
 542
 543         if (WARN_ON(!wowlan))
 544                 return -EINVAL;
 545
 546         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 547         if (!key_data.rsc_tsc)
 548                 return -ENOMEM;
 549
 550         mutex_lock(&mvm->mutex);
 551
 552         old_aux_sta_id = mvm->aux_sta.sta_id;
 553
 554         /* see if there's only a single BSS vif and it's associated */
 555         ieee80211_iterate_active_interfaces_atomic(
 556                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 557                 iwl_mvm_d3_iface_iterator, &suspend_iter_data);
 558
 559         if (suspend_iter_data.error || !suspend_iter_data.vif) {
 560                 ret = 1;
 561                 goto out_noreset;
 562         }
 563
 564         vif = suspend_iter_data.vif;
 565         mvmvif = iwl_mvm_vif_from_mac80211(vif);
 566
 567         ap_sta = rcu_dereference_protected(
 568                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
 569                         lockdep_is_held(&mvm->mutex));
 570         if (IS_ERR_OR_NULL(ap_sta)) {
 571                 ret = -EINVAL;
 572                 goto out_noreset;
 573         }
 574
 575         mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
 576
 577         /*
 578          * The D3 firmware still hardcodes the AP station ID for the
 579          * BSS we're associated with as 0. Store the real STA ID here
 580          * and assign 0. When we leave this function, we'll restore
 581          * the original value for the resume code.
 582          */
 583         old_ap_sta_id = mvm_ap_sta->sta_id;
 584         mvm_ap_sta->sta_id = 0;
 585         mvmvif->ap_sta_id = 0;
 586
 587         /* TODO: wowlan_config_cmd.wowlan_ba_teardown_tids */
 588
 589         wowlan_config_cmd.is_11n_connection = ap_sta->ht_cap.ht_supported;
 590
 591         /*
 592          * We know the last used seqno, and the uCode expects to know that
 593          * one, it will increment before TX.
 594          */
 595         seq = mvm_ap_sta->last_seq_ctl & IEEE80211_SCTL_SEQ;
 596         wowlan_config_cmd.non_qos_seq = cpu_to_le16(seq);
 597
 598         /*
 599          * For QoS counters, we store the one to use next, so subtract 0x10
 600          * since the uCode will add 0x10 *before* using the value while we
 601          * increment after using the value (i.e. store the next value to use).
 602          */
 603         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
 604                 seq = mvm_ap_sta->tid_data[i].seq_number;
 605                 seq -= 0x10;
 606                 wowlan_config_cmd.qos_seq[i] = cpu_to_le16(seq);
 607         }
 608
 609         if (wowlan->disconnect)
 610                 wowlan_config_cmd.wakeup_filter |=
 611                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 612                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 613         if (wowlan->magic_pkt)
 614                 wowlan_config_cmd.wakeup_filter |=
 615                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 616         if (wowlan->gtk_rekey_failure)
 617                 wowlan_config_cmd.wakeup_filter |=
 618                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 619         if (wowlan->eap_identity_req)
 620                 wowlan_config_cmd.wakeup_filter |=
 621                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 622         if (wowlan->four_way_handshake)
 623                 wowlan_config_cmd.wakeup_filter |=
 624                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 625         if (wowlan->n_patterns)
 626                 wowlan_config_cmd.wakeup_filter |=
 627                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 628
 629         if (wowlan->rfkill_release)
 630                 d3_cfg_cmd.wakeup_flags |=
 631                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 632
 633         iwl_mvm_cancel_scan(mvm);
 634
 635         iwl_trans_stop_device(mvm->trans);
 636
 637         /*
 638          * Set the HW restart bit -- this is mostly true as we're
 639          * going to load new firmware and reprogram that, though
 640          * the reprogramming is going to be manual to avoid adding
 641          * all the MACs that aren't support.
 642          * We don't have to clear up everything though because the
 643          * reprogramming is manual. When we resume, we'll actually
 644          * go through a proper restart sequence again to switch
 645          * back to the runtime firmware image.
 646          */
 647         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 648
 649         /* We reprogram keys and shouldn't allocate new key indices */
 650         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 651
 652         /*
 653          * The D3 firmware still hardcodes the AP station ID for the
 654          * BSS we're associated with as 0. As a result, we have to move
 655          * the auxiliary station to ID 1 so the ID 0 remains free for
 656          * the AP station for later.
 657          * We set the sta_id to 1 here, and reset it to its previous
 658          * value (that we stored above) later.
 659          */
 660         mvm->aux_sta.sta_id = 1;
 661
 662         ret = iwl_mvm_load_d3_fw(mvm);
 663         if (ret)
 664                 goto out;
 665
 666         ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
 667         if (ret)
 668                 goto out;
 669
 670         if (!iwlwifi_mod_params.sw_crypto) {
 671                 /*
 672                  * This needs to be unlocked due to lock ordering
 673                  * constraints. Since we're in the suspend path
 674                  * that isn't really a problem though.
 675                  */
 676                 mutex_unlock(&mvm->mutex);
 677                 ieee80211_iter_keys(mvm->hw, vif,
 678                                     iwl_mvm_wowlan_program_keys,
 679                                     &key_data);
 680                 mutex_lock(&mvm->mutex);
 681                 if (key_data.error) {
 682                         ret = -EIO;
 683                         goto out;
 684                 }
 685
 686                 if (key_data.use_rsc_tsc) {
 687                         struct iwl_host_cmd rsc_tsc_cmd = {
 688                                 .id = WOWLAN_TSC_RSC_PARAM,
 689                                 .flags = CMD_SYNC,
 690                                 .data[0] = key_data.rsc_tsc,
 691                                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 692                                 .len[0] = sizeof(*key_data.rsc_tsc),
 693                         };
 694
 695                         ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
 696                         if (ret)
 697                                 goto out;
 698                 }
 699
 700                 if (key_data.use_tkip) {
 701                         ret = iwl_mvm_send_cmd_pdu(mvm,
 702                                                    WOWLAN_TKIP_PARAM,
 703                                                    CMD_SYNC, sizeof(tkip_cmd),
 704                                                    &tkip_cmd);
 705                         if (ret)
 706                                 goto out;
 707                 }
 708
 709                 if (mvmvif->rekey_data.valid) {
 710                         memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
 711                         memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
 712                                NL80211_KCK_LEN);
 713                         kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
 714                         memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
 715                                NL80211_KEK_LEN);
 716                         kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
 717                         kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
 718
 719                         ret = iwl_mvm_send_cmd_pdu(mvm,
 720                                                    WOWLAN_KEK_KCK_MATERIAL,
 721                                                    CMD_SYNC,
 722                                                    sizeof(kek_kck_cmd),
 723                                                    &kek_kck_cmd);
 724                         if (ret)
 725                                 goto out;
 726                 }
 727         }
 728
 729         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION,
 730                                    CMD_SYNC, sizeof(wowlan_config_cmd),
 731                                    &wowlan_config_cmd);
 732         if (ret)
 733                 goto out;
 734
 735         ret = iwl_mvm_send_patterns(mvm, wowlan);
 736         if (ret)
 737                 goto out;
 738
 739         ret = iwl_mvm_send_proto_offload(mvm, vif);
 740         if (ret)
 741                 goto out;
 742
 743         /* must be last -- this switches firmware state */
 744         ret = iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD, CMD_SYNC,
 745                                    sizeof(d3_cfg_cmd), &d3_cfg_cmd);
 746         if (ret)
 747                 goto out;
 748
 749         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 750
 751         iwl_trans_d3_suspend(mvm->trans);
 752  out:
 753         mvm->aux_sta.sta_id = old_aux_sta_id;
 754         mvm_ap_sta->sta_id = old_ap_sta_id;
 755         mvmvif->ap_sta_id = old_ap_sta_id;
 756  out_noreset:
 757         kfree(key_data.rsc_tsc);
 758         if (ret < 0)
 759                 ieee80211_restart_hw(mvm->hw);
 760
 761         mutex_unlock(&mvm->mutex);
 762
 763         return ret;
 764 }
 765
 766 static void iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
 767                                          struct ieee80211_vif *vif)
 768 {
 769         u32 base = mvm->error_event_table;
 770         struct error_table_start {
 771                 /* cf. struct iwl_error_event_table */
 772                 u32 valid;
 773                 u32 error_id;
 774         } err_info;
 775         struct cfg80211_wowlan_wakeup wakeup = {
 776                 .pattern_idx = -1,
 777         };
 778         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
 779         struct iwl_host_cmd cmd = {
 780                 .id = WOWLAN_GET_STATUSES,
 781                 .flags = CMD_SYNC | CMD_WANT_SKB,
 782         };
 783         struct iwl_wowlan_status *status;
 784         u32 reasons;
 785         int ret, len;
 786         bool pkt8023 = false;
 787         struct sk_buff *pkt = NULL;
 788
 789         iwl_trans_read_mem_bytes(mvm->trans, base,
 790                                  &err_info, sizeof(err_info));
 791
 792         if (err_info.valid) {
 793                 IWL_INFO(mvm, "error table is valid (%d)\n",
 794                          err_info.valid);
 795                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
 796                         wakeup.rfkill_release = true;
 797                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
 798                                                        GFP_KERNEL);
 799                 }
 800                 return;
 801         }
 802
 803         /* only for tracing for now */
 804         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, CMD_SYNC, 0, NULL);
 805         if (ret)
 806                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
 807
 808         ret = iwl_mvm_send_cmd(mvm, &cmd);
 809         if (ret) {
 810                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
 811                 return;
 812         }
 813
 814         /* RF-kill already asserted again... */
 815         if (!cmd.resp_pkt)
 816                 return;
 817
 818         len = le32_to_cpu(cmd.resp_pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 819         if (len - sizeof(struct iwl_cmd_header) < sizeof(*status)) {
 820                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
 821                 goto out;
 822         }
 823
 824         status = (void *)cmd.resp_pkt->data;
 825
 826         if (len - sizeof(struct iwl_cmd_header) !=
 827             sizeof(*status) + le32_to_cpu(status->wake_packet_bufsize)) {
 828                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
 829                 goto out;
 830         }
 831
 832         reasons = le32_to_cpu(status->wakeup_reasons);
 833
 834         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
 835                 wakeup_report = NULL;
 836                 goto report;
 837         }
 838
 839         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET) {
 840                 wakeup.magic_pkt = true;
 841                 pkt8023 = true;
 842         }
 843
 844         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN) {
 845                 wakeup.pattern_idx =
 846                         le16_to_cpu(status->pattern_number);
 847                 pkt8023 = true;
 848         }
 849
 850         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
 851                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
 852                 wakeup.disconnect = true;
 853
 854         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE) {
 855                 wakeup.gtk_rekey_failure = true;
 856                 pkt8023 = true;
 857         }
 858
 859         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED) {
 860                 wakeup.rfkill_release = true;
 861                 pkt8023 = true;
 862         }
 863
 864         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST) {
 865                 wakeup.eap_identity_req = true;
 866                 pkt8023 = true;
 867         }
 868
 869         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE) {
 870                 wakeup.four_way_handshake = true;
 871                 pkt8023 = true;
 872         }
 873
 874         if (status->wake_packet_bufsize) {
 875                 u32 pktsize = le32_to_cpu(status->wake_packet_bufsize);
 876                 u32 pktlen = le32_to_cpu(status->wake_packet_length);
 877
 878                 if (pkt8023) {
 879                         pkt = alloc_skb(pktsize, GFP_KERNEL);
 880                         if (!pkt)
 881                                 goto report;
 882                         memcpy(skb_put(pkt, pktsize), status->wake_packet,
 883                                pktsize);
 884                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
 885                                 goto report;
 886                         wakeup.packet = pkt->data;
 887                         wakeup.packet_present_len = pkt->len;
 888                         wakeup.packet_len = pkt->len - (pktlen - pktsize);
 889                         wakeup.packet_80211 = false;
 890                 } else {
 891                         wakeup.packet = status->wake_packet;
 892                         wakeup.packet_present_len = pktsize;
 893                         wakeup.packet_len = pktlen;
 894                         wakeup.packet_80211 = true;
 895                 }
 896         }
 897
 898  report:
 899         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
 900         kfree_skb(pkt);
 901
 902  out:
 903         iwl_free_resp(&cmd);
 904 }
 905
 906 int iwl_mvm_resume(struct ieee80211_hw *hw)
 907 {
 908         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 909         struct iwl_d3_iter_data resume_iter_data = {
 910                 .mvm = mvm,
 911         };
 912         struct ieee80211_vif *vif = NULL;
 913         int ret;
 914         enum iwl_d3_status d3_status;
 915
 916         mutex_lock(&mvm->mutex);
 917
 918         /* get the BSS vif pointer again */
 919         ieee80211_iterate_active_interfaces_atomic(
 920                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 921                 iwl_mvm_d3_iface_iterator, &resume_iter_data);
 922
 923         if (WARN_ON(resume_iter_data.error || !resume_iter_data.vif))
 924                 goto out_unlock;
 925
 926         vif = resume_iter_data.vif;
 927
 928         ret = iwl_trans_d3_resume(mvm->trans, &d3_status);
 929         if (ret)
 930                 goto out_unlock;
 931
 932         if (d3_status != IWL_D3_STATUS_ALIVE) {
 933                 IWL_INFO(mvm, "Device was reset during suspend\n");
 934                 goto out_unlock;
 935         }
 936
 937         iwl_mvm_query_wakeup_reasons(mvm, vif);
 938
 939  out_unlock:
 940         mutex_unlock(&mvm->mutex);
 941
 942         if (vif)
 943                 ieee80211_resume_disconnect(vif);
 944
 945         /* return 1 to reconfigure the device */
 946         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 947         return 1;
 948 }
 949
 950 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
 951 {
 952         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 953
 954         device_set_wakeup_enable(mvm->trans->dev, enabled);
 955 }