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

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
  23  *
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  25  * in the file called LICENSE.GPL.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
  31  * BSD LICENSE
  32  *
  33  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
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  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  *
  40  *  * Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  *  * Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
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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 <linux/etherdevice.h>
  65 #include <net/cfg80211.h>
  66 #include <net/ipv6.h>
  67 #include "iwl-modparams.h"
  68 #include "fw-api.h"
  69 #include "mvm.h"
  70
  71 void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw,
  72                             struct ieee80211_vif *vif,
  73                             struct cfg80211_gtk_rekey_data *data)
  74 {
  75         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
  76         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  77
  78         if (iwlwifi_mod_params.sw_crypto)
  79                 return;
  80
  81         mutex_lock(&mvm->mutex);
  82
  83         memcpy(mvmvif->rekey_data.kek, data->kek, NL80211_KEK_LEN);
  84         memcpy(mvmvif->rekey_data.kck, data->kck, NL80211_KCK_LEN);
  85         mvmvif->rekey_data.replay_ctr =
  86                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
  87         mvmvif->rekey_data.valid = true;
  88
  89         mutex_unlock(&mvm->mutex);
  90 }
  91
  92 #if IS_ENABLED(CONFIG_IPV6)
  93 void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
  94                               struct ieee80211_vif *vif,
  95                               struct inet6_dev *idev)
  96 {
  97         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  98         struct inet6_ifaddr *ifa;
  99         int idx = 0;
 100
 101         read_lock_bh(&idev->lock);
 102         list_for_each_entry(ifa, &idev->addr_list, if_list) {
 103                 mvmvif->target_ipv6_addrs[idx] = ifa->addr;
 104                 idx++;
 105                 if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS)
 106                         break;
 107         }
 108         read_unlock_bh(&idev->lock);
 109
 110         mvmvif->num_target_ipv6_addrs = idx;
 111 }
 112 #endif
 113
 114 void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
 115                                      struct ieee80211_vif *vif, int idx)
 116 {
 117         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 118
 119         mvmvif->tx_key_idx = idx;
 120 }
 121
 122 static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out)
 123 {
 124         int i;
 125
 126         for (i = 0; i < IWL_P1K_SIZE; i++)
 127                 out[i] = cpu_to_le16(p1k[i]);
 128 }
 129
 130 struct wowlan_key_data {
 131         struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc;
 132         struct iwl_wowlan_tkip_params_cmd *tkip;
 133         bool error, use_rsc_tsc, use_tkip;
 134         int gtk_key_idx;
 135 };
 136
 137 static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
 138                                         struct ieee80211_vif *vif,
 139                                         struct ieee80211_sta *sta,
 140                                         struct ieee80211_key_conf *key,
 141                                         void *_data)
 142 {
 143         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 144         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 145         struct wowlan_key_data *data = _data;
 146         struct aes_sc *aes_sc, *aes_tx_sc = NULL;
 147         struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
 148         struct iwl_p1k_cache *rx_p1ks;
 149         u8 *rx_mic_key;
 150         struct ieee80211_key_seq seq;
 151         u32 cur_rx_iv32 = 0;
 152         u16 p1k[IWL_P1K_SIZE];
 153         int ret, i;
 154
 155         mutex_lock(&mvm->mutex);
 156
 157         switch (key->cipher) {
 158         case WLAN_CIPHER_SUITE_WEP40:
 159         case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */
 160                 struct {
 161                         struct iwl_mvm_wep_key_cmd wep_key_cmd;
 162                         struct iwl_mvm_wep_key wep_key;
 163                 } __packed wkc = {
 164                         .wep_key_cmd.mac_id_n_color =
 165                                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 166                                                                 mvmvif->color)),
 167                         .wep_key_cmd.num_keys = 1,
 168                         /* firmware sets STA_KEY_FLG_WEP_13BYTES */
 169                         .wep_key_cmd.decryption_type = STA_KEY_FLG_WEP,
 170                         .wep_key.key_index = key->keyidx,
 171                         .wep_key.key_size = key->keylen,
 172                 };
 173
 174                 /*
 175                  * This will fail -- the key functions don't set support
 176                  * pairwise WEP keys. However, that's better than silently
 177                  * failing WoWLAN. Or maybe not?
 178                  */
 179                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 180                         break;
 181
 182                 memcpy(&wkc.wep_key.key[3], key->key, key->keylen);
 183                 if (key->keyidx == mvmvif->tx_key_idx) {
 184                         /* TX key must be at offset 0 */
 185                         wkc.wep_key.key_offset = 0;
 186                 } else {
 187                         /* others start at 1 */
 188                         data->gtk_key_idx++;
 189                         wkc.wep_key.key_offset = data->gtk_key_idx;
 190                 }
 191
 192                 ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, CMD_SYNC,
 193                                            sizeof(wkc), &wkc);
 194                 data->error = ret != 0;
 195
 196                 mvm->ptk_ivlen = key->iv_len;
 197                 mvm->ptk_icvlen = key->icv_len;
 198                 mvm->gtk_ivlen = key->iv_len;
 199                 mvm->gtk_icvlen = key->icv_len;
 200
 201                 /* don't upload key again */
 202                 goto out_unlock;
 203         }
 204         default:
 205                 data->error = true;
 206                 goto out_unlock;
 207         case WLAN_CIPHER_SUITE_AES_CMAC:
 208                 /*
 209                  * Ignore CMAC keys -- the WoWLAN firmware doesn't support them
 210                  * but we also shouldn't abort suspend due to that. It does have
 211                  * support for the IGTK key renewal, but doesn't really use the
 212                  * IGTK for anything. This means we could spuriously wake up or
 213                  * be deauthenticated, but that was considered acceptable.
 214                  */
 215                 goto out_unlock;
 216         case WLAN_CIPHER_SUITE_TKIP:
 217                 if (sta) {
 218                         tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
 219                         tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
 220
 221                         rx_p1ks = data->tkip->rx_uni;
 222
 223                         ieee80211_get_key_tx_seq(key, &seq);
 224                         tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
 225                         tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
 226
 227                         ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
 228                         iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k);
 229
 230                         memcpy(data->tkip->mic_keys.tx,
 231                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
 232                                IWL_MIC_KEY_SIZE);
 233
 234                         rx_mic_key = data->tkip->mic_keys.rx_unicast;
 235                 } else {
 236                         tkip_sc =
 237                                 data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
 238                         rx_p1ks = data->tkip->rx_multi;
 239                         rx_mic_key = data->tkip->mic_keys.rx_mcast;
 240                 }
 241
 242                 /*
 243                  * For non-QoS this relies on the fact that both the uCode and
 244                  * mac80211 use TID 0 (as they need to to avoid replay attacks)
 245                  * for checking the IV in the frames.
 246                  */
 247                 for (i = 0; i < IWL_NUM_RSC; i++) {
 248                         ieee80211_get_key_rx_seq(key, i, &seq);
 249                         tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
 250                         tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
 251                         /* wrapping isn't allowed, AP must rekey */
 252                         if (seq.tkip.iv32 > cur_rx_iv32)
 253                                 cur_rx_iv32 = seq.tkip.iv32;
 254                 }
 255
 256                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 257                                           cur_rx_iv32, p1k);
 258                 iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k);
 259                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 260                                           cur_rx_iv32 + 1, p1k);
 261                 iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k);
 262
 263                 memcpy(rx_mic_key,
 264                        &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
 265                        IWL_MIC_KEY_SIZE);
 266
 267                 data->use_tkip = true;
 268                 data->use_rsc_tsc = true;
 269                 break;
 270         case WLAN_CIPHER_SUITE_CCMP:
 271                 if (sta) {
 272                         u8 *pn = seq.ccmp.pn;
 273
 274                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
 275                         aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
 276
 277                         ieee80211_get_key_tx_seq(key, &seq);
 278                         aes_tx_sc->pn = cpu_to_le64((u64)pn[5] |
 279                                                     ((u64)pn[4] << 8) |
 280                                                     ((u64)pn[3] << 16) |
 281                                                     ((u64)pn[2] << 24) |
 282                                                     ((u64)pn[1] << 32) |
 283                                                     ((u64)pn[0] << 40));
 284                 } else {
 285                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
 286                 }
 287
 288                 /*
 289                  * For non-QoS this relies on the fact that both the uCode and
 290                  * mac80211 use TID 0 for checking the IV in the frames.
 291                  */
 292                 for (i = 0; i < IWL_NUM_RSC; i++) {
 293                         u8 *pn = seq.ccmp.pn;
 294
 295                         ieee80211_get_key_rx_seq(key, i, &seq);
 296                         aes_sc->pn = cpu_to_le64((u64)pn[5] |
 297                                                  ((u64)pn[4] << 8) |
 298                                                  ((u64)pn[3] << 16) |
 299                                                  ((u64)pn[2] << 24) |
 300                                                  ((u64)pn[1] << 32) |
 301                                                  ((u64)pn[0] << 40));
 302                 }
 303                 data->use_rsc_tsc = true;
 304                 break;
 305         }
 306
 307         /*
 308          * The D3 firmware hardcodes the key offset 0 as the key it uses
 309          * to transmit packets to the AP, i.e. the PTK.
 310          */
 311         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
 312                 key->hw_key_idx = 0;
 313                 mvm->ptk_ivlen = key->iv_len;
 314                 mvm->ptk_icvlen = key->icv_len;
 315         } else {
 316                 data->gtk_key_idx++;
 317                 key->hw_key_idx = data->gtk_key_idx;
 318                 mvm->gtk_ivlen = key->iv_len;
 319                 mvm->gtk_icvlen = key->icv_len;
 320         }
 321
 322         ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, true);
 323         data->error = ret != 0;
 324 out_unlock:
 325         mutex_unlock(&mvm->mutex);
 326 }
 327
 328 static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
 329                                  struct cfg80211_wowlan *wowlan)
 330 {
 331         struct iwl_wowlan_patterns_cmd *pattern_cmd;
 332         struct iwl_host_cmd cmd = {
 333                 .id = WOWLAN_PATTERNS,
 334                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 335                 .flags = CMD_SYNC,
 336         };
 337         int i, err;
 338
 339         if (!wowlan->n_patterns)
 340                 return 0;
 341
 342         cmd.len[0] = sizeof(*pattern_cmd) +
 343                 wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern);
 344
 345         pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
 346         if (!pattern_cmd)
 347                 return -ENOMEM;
 348
 349         pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
 350
 351         for (i = 0; i < wowlan->n_patterns; i++) {
 352                 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
 353
 354                 memcpy(&pattern_cmd->patterns[i].mask,
 355                        wowlan->patterns[i].mask, mask_len);
 356                 memcpy(&pattern_cmd->patterns[i].pattern,
 357                        wowlan->patterns[i].pattern,
 358                        wowlan->patterns[i].pattern_len);
 359                 pattern_cmd->patterns[i].mask_size = mask_len;
 360                 pattern_cmd->patterns[i].pattern_size =
 361                         wowlan->patterns[i].pattern_len;
 362         }
 363
 364         cmd.data[0] = pattern_cmd;
 365         err = iwl_mvm_send_cmd(mvm, &cmd);
 366         kfree(pattern_cmd);
 367         return err;
 368 }
 369
 370 static int iwl_mvm_send_proto_offload(struct iwl_mvm *mvm,
 371                                       struct ieee80211_vif *vif)
 372 {
 373         struct iwl_proto_offload_cmd cmd = {};
 374 #if IS_ENABLED(CONFIG_IPV6)
 375         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 376         int i;
 377
 378         if (mvmvif->num_target_ipv6_addrs) {
 379                 cmd.enabled |= cpu_to_le32(IWL_D3_PROTO_OFFLOAD_NS);
 380                 memcpy(cmd.ndp_mac_addr, vif->addr, ETH_ALEN);
 381         }
 382
 383         BUILD_BUG_ON(sizeof(cmd.target_ipv6_addr[i]) !=
 384                      sizeof(mvmvif->target_ipv6_addrs[i]));
 385
 386         for (i = 0; i < mvmvif->num_target_ipv6_addrs; i++)
 387                 memcpy(cmd.target_ipv6_addr[i],
 388                        &mvmvif->target_ipv6_addrs[i],
 389                        sizeof(cmd.target_ipv6_addr[i]));
 390 #endif
 391
 392         if (vif->bss_conf.arp_addr_cnt) {
 393                 cmd.enabled |= cpu_to_le32(IWL_D3_PROTO_OFFLOAD_ARP);
 394                 cmd.host_ipv4_addr = vif->bss_conf.arp_addr_list[0];
 395                 memcpy(cmd.arp_mac_addr, vif->addr, ETH_ALEN);
 396         }
 397
 398         if (!cmd.enabled)
 399                 return 0;
 400
 401         return iwl_mvm_send_cmd_pdu(mvm, PROT_OFFLOAD_CONFIG_CMD, CMD_SYNC,
 402                                     sizeof(cmd), &cmd);
 403 }
 404
 405 struct iwl_d3_iter_data {
 406         struct iwl_mvm *mvm;
 407         struct ieee80211_vif *vif;
 408         bool error;
 409 };
 410
 411 static void iwl_mvm_d3_iface_iterator(void *_data, u8 *mac,
 412                                       struct ieee80211_vif *vif)
 413 {
 414         struct iwl_d3_iter_data *data = _data;
 415         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 416
 417         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 418                 return;
 419
 420         if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
 421                 return;
 422
 423         if (data->vif) {
 424                 IWL_ERR(data->mvm, "More than one managed interface active!\n");
 425                 data->error = true;
 426                 return;
 427         }
 428
 429         data->vif = vif;
 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         u32 status;
 443
 444         /* add back the PHY */
 445         if (WARN_ON(!mvmvif->phy_ctxt))
 446                 return -EINVAL;
 447
 448         rcu_read_lock();
 449         ctx = rcu_dereference(vif->chanctx_conf);
 450         if (WARN_ON(!ctx)) {
 451                 rcu_read_unlock();
 452                 return -EINVAL;
 453         }
 454         chandef = ctx->def;
 455         chains_static = ctx->rx_chains_static;
 456         chains_dynamic = ctx->rx_chains_dynamic;
 457         rcu_read_unlock();
 458
 459         ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
 460                                    chains_static, chains_dynamic);
 461         if (ret)
 462                 return ret;
 463
 464         /* add back the MAC */
 465         mvmvif->uploaded = false;
 466
 467         if (WARN_ON(!vif->bss_conf.assoc))
 468                 return -EINVAL;
 469         /* hack */
 470         vif->bss_conf.assoc = false;
 471         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 472         vif->bss_conf.assoc = true;
 473         if (ret)
 474                 return ret;
 475
 476         /* add back binding - XXX refactor? */
 477         binding_cmd.id_and_color =
 478                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 479                                                 mvmvif->phy_ctxt->color));
 480         binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
 481         binding_cmd.phy =
 482                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 483                                                 mvmvif->phy_ctxt->color));
 484         binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 485                                                               mvmvif->color));
 486         for (i = 1; i < MAX_MACS_IN_BINDING; i++)
 487                 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
 488
 489         status = 0;
 490         ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
 491                                           sizeof(binding_cmd), &binding_cmd,
 492                                           &status);
 493         if (ret) {
 494                 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
 495                 return ret;
 496         }
 497
 498         if (status) {
 499                 IWL_ERR(mvm, "Binding command failed: %u\n", status);
 500                 return -EIO;
 501         }
 502
 503         ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false);
 504         if (ret)
 505                 return ret;
 506         rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
 507
 508         ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
 509         if (ret)
 510                 return ret;
 511
 512         /* and some quota */
 513         quota_cmd.quotas[0].id_and_color =
 514                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 515                                                 mvmvif->phy_ctxt->color));
 516         quota_cmd.quotas[0].quota = cpu_to_le32(100);
 517         quota_cmd.quotas[0].max_duration = cpu_to_le32(1000);
 518
 519         for (i = 1; i < MAX_BINDINGS; i++)
 520                 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 521
 522         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, CMD_SYNC,
 523                                    sizeof(quota_cmd), &quota_cmd);
 524         if (ret)
 525                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 526
 527         return 0;
 528 }
 529
 530 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
 531 {
 532         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 533         struct iwl_d3_iter_data suspend_iter_data = {
 534                 .mvm = mvm,
 535         };
 536         struct ieee80211_vif *vif;
 537         struct iwl_mvm_vif *mvmvif;
 538         struct ieee80211_sta *ap_sta;
 539         struct iwl_mvm_sta *mvm_ap_sta;
 540         struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
 541         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 542         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 543         struct iwl_d3_manager_config d3_cfg_cmd = {};
 544         struct wowlan_key_data key_data = {
 545                 .use_rsc_tsc = false,
 546                 .tkip = &tkip_cmd,
 547                 .use_tkip = false,
 548         };
 549         int ret, i;
 550         u16 seq;
 551         u8 old_aux_sta_id, old_ap_sta_id = IWL_MVM_STATION_COUNT;
 552
 553         if (WARN_ON(!wowlan))
 554                 return -EINVAL;
 555
 556         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 557         if (!key_data.rsc_tsc)
 558                 return -ENOMEM;
 559
 560         mutex_lock(&mvm->mutex);
 561
 562         old_aux_sta_id = mvm->aux_sta.sta_id;
 563
 564         /* see if there's only a single BSS vif and it's associated */
 565         ieee80211_iterate_active_interfaces_atomic(
 566                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 567                 iwl_mvm_d3_iface_iterator, &suspend_iter_data);
 568
 569         if (suspend_iter_data.error || !suspend_iter_data.vif) {
 570                 ret = 1;
 571                 goto out_noreset;
 572         }
 573
 574         vif = suspend_iter_data.vif;
 575         mvmvif = iwl_mvm_vif_from_mac80211(vif);
 576
 577         ap_sta = rcu_dereference_protected(
 578                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
 579                         lockdep_is_held(&mvm->mutex));
 580         if (IS_ERR_OR_NULL(ap_sta)) {
 581                 ret = -EINVAL;
 582                 goto out_noreset;
 583         }
 584
 585         mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
 586
 587         /*
 588          * The D3 firmware still hardcodes the AP station ID for the
 589          * BSS we're associated with as 0. Store the real STA ID here
 590          * and assign 0. When we leave this function, we'll restore
 591          * the original value for the resume code.
 592          */
 593         old_ap_sta_id = mvm_ap_sta->sta_id;
 594         mvm_ap_sta->sta_id = 0;
 595         mvmvif->ap_sta_id = 0;
 596
 597         /* TODO: wowlan_config_cmd.wowlan_ba_teardown_tids */
 598
 599         wowlan_config_cmd.is_11n_connection = ap_sta->ht_cap.ht_supported;
 600
 601         /*
 602          * We know the last used seqno, and the uCode expects to know that
 603          * one, it will increment before TX.
 604          */
 605         seq = mvm_ap_sta->last_seq_ctl & IEEE80211_SCTL_SEQ;
 606         wowlan_config_cmd.non_qos_seq = cpu_to_le16(seq);
 607
 608         /*
 609          * For QoS counters, we store the one to use next, so subtract 0x10
 610          * since the uCode will add 0x10 *before* using the value while we
 611          * increment after using the value (i.e. store the next value to use).
 612          */
 613         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
 614                 seq = mvm_ap_sta->tid_data[i].seq_number;
 615                 seq -= 0x10;
 616                 wowlan_config_cmd.qos_seq[i] = cpu_to_le16(seq);
 617         }
 618
 619         if (wowlan->disconnect)
 620                 wowlan_config_cmd.wakeup_filter |=
 621                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 622                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 623         if (wowlan->magic_pkt)
 624                 wowlan_config_cmd.wakeup_filter |=
 625                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 626         if (wowlan->gtk_rekey_failure)
 627                 wowlan_config_cmd.wakeup_filter |=
 628                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 629         if (wowlan->eap_identity_req)
 630                 wowlan_config_cmd.wakeup_filter |=
 631                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 632         if (wowlan->four_way_handshake)
 633                 wowlan_config_cmd.wakeup_filter |=
 634                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 635         if (wowlan->n_patterns)
 636                 wowlan_config_cmd.wakeup_filter |=
 637                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 638
 639         if (wowlan->rfkill_release)
 640                 d3_cfg_cmd.wakeup_flags |=
 641                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 642
 643         iwl_mvm_cancel_scan(mvm);
 644
 645         iwl_trans_stop_device(mvm->trans);
 646
 647         /*
 648          * Set the HW restart bit -- this is mostly true as we're
 649          * going to load new firmware and reprogram that, though
 650          * the reprogramming is going to be manual to avoid adding
 651          * all the MACs that aren't support.
 652          * We don't have to clear up everything though because the
 653          * reprogramming is manual. When we resume, we'll actually
 654          * go through a proper restart sequence again to switch
 655          * back to the runtime firmware image.
 656          */
 657         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 658
 659         /* We reprogram keys and shouldn't allocate new key indices */
 660         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 661
 662         mvm->ptk_ivlen = 0;
 663         mvm->ptk_icvlen = 0;
 664         mvm->ptk_ivlen = 0;
 665         mvm->ptk_icvlen = 0;
 666
 667         /*
 668          * The D3 firmware still hardcodes the AP station ID for the
 669          * BSS we're associated with as 0. As a result, we have to move
 670          * the auxiliary station to ID 1 so the ID 0 remains free for
 671          * the AP station for later.
 672          * We set the sta_id to 1 here, and reset it to its previous
 673          * value (that we stored above) later.
 674          */
 675         mvm->aux_sta.sta_id = 1;
 676
 677         ret = iwl_mvm_load_d3_fw(mvm);
 678         if (ret)
 679                 goto out;
 680
 681         ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
 682         if (ret)
 683                 goto out;
 684
 685         if (!iwlwifi_mod_params.sw_crypto) {
 686                 /*
 687                  * This needs to be unlocked due to lock ordering
 688                  * constraints. Since we're in the suspend path
 689                  * that isn't really a problem though.
 690                  */
 691                 mutex_unlock(&mvm->mutex);
 692                 ieee80211_iter_keys(mvm->hw, vif,
 693                                     iwl_mvm_wowlan_program_keys,
 694                                     &key_data);
 695                 mutex_lock(&mvm->mutex);
 696                 if (key_data.error) {
 697                         ret = -EIO;
 698                         goto out;
 699                 }
 700
 701                 if (key_data.use_rsc_tsc) {
 702                         struct iwl_host_cmd rsc_tsc_cmd = {
 703                                 .id = WOWLAN_TSC_RSC_PARAM,
 704                                 .flags = CMD_SYNC,
 705                                 .data[0] = key_data.rsc_tsc,
 706                                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 707                                 .len[0] = sizeof(*key_data.rsc_tsc),
 708                         };
 709
 710                         ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
 711                         if (ret)
 712                                 goto out;
 713                 }
 714
 715                 if (key_data.use_tkip) {
 716                         ret = iwl_mvm_send_cmd_pdu(mvm,
 717                                                    WOWLAN_TKIP_PARAM,
 718                                                    CMD_SYNC, sizeof(tkip_cmd),
 719                                                    &tkip_cmd);
 720                         if (ret)
 721                                 goto out;
 722                 }
 723
 724                 if (mvmvif->rekey_data.valid) {
 725                         memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
 726                         memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
 727                                NL80211_KCK_LEN);
 728                         kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
 729                         memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
 730                                NL80211_KEK_LEN);
 731                         kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
 732                         kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
 733
 734                         ret = iwl_mvm_send_cmd_pdu(mvm,
 735                                                    WOWLAN_KEK_KCK_MATERIAL,
 736                                                    CMD_SYNC,
 737                                                    sizeof(kek_kck_cmd),
 738                                                    &kek_kck_cmd);
 739                         if (ret)
 740                                 goto out;
 741                 }
 742         }
 743
 744         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION,
 745                                    CMD_SYNC, sizeof(wowlan_config_cmd),
 746                                    &wowlan_config_cmd);
 747         if (ret)
 748                 goto out;
 749
 750         ret = iwl_mvm_send_patterns(mvm, wowlan);
 751         if (ret)
 752                 goto out;
 753
 754         ret = iwl_mvm_send_proto_offload(mvm, vif);
 755         if (ret)
 756                 goto out;
 757
 758         /* must be last -- this switches firmware state */
 759         ret = iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD, CMD_SYNC,
 760                                    sizeof(d3_cfg_cmd), &d3_cfg_cmd);
 761         if (ret)
 762                 goto out;
 763
 764         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 765
 766         iwl_trans_d3_suspend(mvm->trans);
 767  out:
 768         mvm->aux_sta.sta_id = old_aux_sta_id;
 769         mvm_ap_sta->sta_id = old_ap_sta_id;
 770         mvmvif->ap_sta_id = old_ap_sta_id;
 771  out_noreset:
 772         kfree(key_data.rsc_tsc);
 773         if (ret < 0)
 774                 ieee80211_restart_hw(mvm->hw);
 775
 776         mutex_unlock(&mvm->mutex);
 777
 778         return ret;
 779 }
 780
 781 static void iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
 782                                          struct ieee80211_vif *vif)
 783 {
 784         u32 base = mvm->error_event_table;
 785         struct error_table_start {
 786                 /* cf. struct iwl_error_event_table */
 787                 u32 valid;
 788                 u32 error_id;
 789         } err_info;
 790         struct cfg80211_wowlan_wakeup wakeup = {
 791                 .pattern_idx = -1,
 792         };
 793         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
 794         struct iwl_host_cmd cmd = {
 795                 .id = WOWLAN_GET_STATUSES,
 796                 .flags = CMD_SYNC | CMD_WANT_SKB,
 797         };
 798         struct iwl_wowlan_status *status;
 799         u32 reasons;
 800         int ret, len;
 801         struct sk_buff *pkt = NULL;
 802
 803         iwl_trans_read_mem_bytes(mvm->trans, base,
 804                                  &err_info, sizeof(err_info));
 805
 806         if (err_info.valid) {
 807                 IWL_INFO(mvm, "error table is valid (%d)\n",
 808                          err_info.valid);
 809                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
 810                         wakeup.rfkill_release = true;
 811                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
 812                                                        GFP_KERNEL);
 813                 }
 814                 return;
 815         }
 816
 817         /* only for tracing for now */
 818         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, CMD_SYNC, 0, NULL);
 819         if (ret)
 820                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
 821
 822         ret = iwl_mvm_send_cmd(mvm, &cmd);
 823         if (ret) {
 824                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
 825                 return;
 826         }
 827
 828         /* RF-kill already asserted again... */
 829         if (!cmd.resp_pkt)
 830                 return;
 831
 832         len = le32_to_cpu(cmd.resp_pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 833         if (len - sizeof(struct iwl_cmd_header) < sizeof(*status)) {
 834                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
 835                 goto out;
 836         }
 837
 838         status = (void *)cmd.resp_pkt->data;
 839
 840         if (len - sizeof(struct iwl_cmd_header) !=
 841             sizeof(*status) +
 842             ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4)) {
 843                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
 844                 goto out;
 845         }
 846
 847         reasons = le32_to_cpu(status->wakeup_reasons);
 848
 849         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
 850                 wakeup_report = NULL;
 851                 goto report;
 852         }
 853
 854         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
 855                 wakeup.magic_pkt = true;
 856
 857         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
 858                 wakeup.pattern_idx =
 859                         le16_to_cpu(status->pattern_number);
 860
 861         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
 862                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
 863                 wakeup.disconnect = true;
 864
 865         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
 866                 wakeup.gtk_rekey_failure = true;
 867
 868         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
 869                 wakeup.rfkill_release = true;
 870
 871         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
 872                 wakeup.eap_identity_req = true;
 873
 874         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
 875                 wakeup.four_way_handshake = true;
 876
 877         if (status->wake_packet_bufsize) {
 878                 int pktsize = le32_to_cpu(status->wake_packet_bufsize);
 879                 int pktlen = le32_to_cpu(status->wake_packet_length);
 880                 const u8 *pktdata = status->wake_packet;
 881                 struct ieee80211_hdr *hdr = (void *)pktdata;
 882                 int truncated = pktlen - pktsize;
 883
 884                 /* this would be a firmware bug */
 885                 if (WARN_ON_ONCE(truncated < 0))
 886                         truncated = 0;
 887
 888                 if (ieee80211_is_data(hdr->frame_control)) {
 889                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
 890                         int ivlen = 0, icvlen = 4; /* also FCS */
 891
 892                         pkt = alloc_skb(pktsize, GFP_KERNEL);
 893                         if (!pkt)
 894                                 goto report;
 895
 896                         memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
 897                         pktdata += hdrlen;
 898                         pktsize -= hdrlen;
 899
 900                         if (ieee80211_has_protected(hdr->frame_control)) {
 901                                 if (is_multicast_ether_addr(hdr->addr1)) {
 902                                         ivlen = mvm->gtk_ivlen;
 903                                         icvlen += mvm->gtk_icvlen;
 904                                 } else {
 905                                         ivlen = mvm->ptk_ivlen;
 906                                         icvlen += mvm->ptk_icvlen;
 907                                 }
 908                         }
 909
 910                         /* if truncated, FCS/ICV is (partially) gone */
 911                         if (truncated >= icvlen) {
 912                                 icvlen = 0;
 913                                 truncated -= icvlen;
 914                         } else {
 915                                 icvlen -= truncated;
 916                                 truncated = 0;
 917                         }
 918
 919                         pktsize -= ivlen + icvlen;
 920                         pktdata += ivlen;
 921
 922                         memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
 923
 924                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
 925                                 goto report;
 926                         wakeup.packet = pkt->data;
 927                         wakeup.packet_present_len = pkt->len;
 928                         wakeup.packet_len = pkt->len - truncated;
 929                         wakeup.packet_80211 = false;
 930                 } else {
 931                         int fcslen = 4;
 932
 933                         if (truncated >= 4) {
 934                                 truncated -= 4;
 935                                 fcslen = 0;
 936                         } else {
 937                                 fcslen -= truncated;
 938                                 truncated = 0;
 939                         }
 940                         pktsize -= fcslen;
 941                         wakeup.packet = status->wake_packet;
 942                         wakeup.packet_present_len = pktsize;
 943                         wakeup.packet_len = pktlen - truncated;
 944                         wakeup.packet_80211 = true;
 945                 }
 946         }
 947
 948  report:
 949         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
 950         kfree_skb(pkt);
 951
 952  out:
 953         iwl_free_resp(&cmd);
 954 }
 955
 956 int iwl_mvm_resume(struct ieee80211_hw *hw)
 957 {
 958         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 959         struct iwl_d3_iter_data resume_iter_data = {
 960                 .mvm = mvm,
 961         };
 962         struct ieee80211_vif *vif = NULL;
 963         int ret;
 964         enum iwl_d3_status d3_status;
 965
 966         mutex_lock(&mvm->mutex);
 967
 968         /* get the BSS vif pointer again */
 969         ieee80211_iterate_active_interfaces_atomic(
 970                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 971                 iwl_mvm_d3_iface_iterator, &resume_iter_data);
 972
 973         if (WARN_ON(resume_iter_data.error || !resume_iter_data.vif))
 974                 goto out_unlock;
 975
 976         vif = resume_iter_data.vif;
 977
 978         ret = iwl_trans_d3_resume(mvm->trans, &d3_status);
 979         if (ret)
 980                 goto out_unlock;
 981
 982         if (d3_status != IWL_D3_STATUS_ALIVE) {
 983                 IWL_INFO(mvm, "Device was reset during suspend\n");
 984                 goto out_unlock;
 985         }
 986
 987         iwl_mvm_query_wakeup_reasons(mvm, vif);
 988
 989  out_unlock:
 990         mutex_unlock(&mvm->mutex);
 991
 992         if (vif)
 993                 ieee80211_resume_disconnect(vif);
 994
 995         /* return 1 to reconfigure the device */
 996         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 997         return 1;
 998 }
 999
1000 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
1001 {
1002         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1003
1004         device_set_wakeup_enable(mvm->trans->dev, enabled);
1005 }