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 - 2014 Intel Mobile Communications GmbH 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of version 2 of the GNU General Public License as 13 * published by the Free Software Foundation. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 23 * USA 24 * 25 * The full GNU General Public License is included in this distribution 26 * in the file called COPYING. 27 * 28 * Contact Information: 29 * Intel Linux Wireless <ilw@linux.intel.com> 30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 31 * 32 * BSD LICENSE 33 * 34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 36 * All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 42 * * Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * * Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in 46 * the documentation and/or other materials provided with the 47 * distribution. 48 * * Neither the name Intel Corporation nor the names of its 49 * contributors may be used to endorse or promote products derived 50 * from this software without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 63 *****************************************************************************/ 64#include "iwl-trans.h" 65#include "mvm.h" 66#include "fw-api.h" 67 68/* 69 * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler 70 * 71 * Copies the phy information in mvm->last_phy_info, it will be used when the 72 * actual data will come from the fw in the next packet. 73 */ 74int iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, 75 struct iwl_device_cmd *cmd) 76{ 77 struct iwl_rx_packet *pkt = rxb_addr(rxb); 78 79 memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info)); 80 mvm->ampdu_ref++; 81 82#ifdef CONFIG_IWLWIFI_DEBUGFS 83 if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 84 spin_lock(&mvm->drv_stats_lock); 85 mvm->drv_rx_stats.ampdu_count++; 86 spin_unlock(&mvm->drv_stats_lock); 87 } 88#endif 89 90 return 0; 91} 92 93/* 94 * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211 95 * 96 * Adds the rxb to a new skb and give it to mac80211 97 */ 98static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, 99 struct ieee80211_hdr *hdr, u16 len, 100 u32 ampdu_status, 101 struct iwl_rx_cmd_buffer *rxb, 102 struct ieee80211_rx_status *stats) 103{ 104 struct sk_buff *skb; 105 unsigned int hdrlen, fraglen; 106 107 /* Dont use dev_alloc_skb(), we'll have enough headroom once 108 * ieee80211_hdr pulled. 109 */ 110 skb = alloc_skb(128, GFP_ATOMIC); 111 if (!skb) { 112 IWL_ERR(mvm, "alloc_skb failed\n"); 113 return; 114 } 115 /* If frame is small enough to fit in skb->head, pull it completely. 116 * If not, only pull ieee80211_hdr so that splice() or TCP coalesce 117 * are more efficient. 118 */ 119 hdrlen = (len <= skb_tailroom(skb)) ? len : sizeof(*hdr); 120 121 memcpy(skb_put(skb, hdrlen), hdr, hdrlen); 122 fraglen = len - hdrlen; 123 124 if (fraglen) { 125 int offset = (void *)hdr + hdrlen - 126 rxb_addr(rxb) + rxb_offset(rxb); 127 128 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, 129 fraglen, rxb->truesize); 130 } 131 132 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats)); 133 134 ieee80211_rx(mvm->hw, skb); 135} 136 137/* 138 * iwl_mvm_get_signal_strength - use new rx PHY INFO API 139 * values are reported by the fw as positive values - need to negate 140 * to obtain their dBM. Account for missing antennas by replacing 0 141 * values by -256dBm: practically 0 power and a non-feasible 8 bit value. 142 */ 143static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, 144 struct iwl_rx_phy_info *phy_info, 145 struct ieee80211_rx_status *rx_status) 146{ 147 int energy_a, energy_b, energy_c, max_energy; 148 u32 val; 149 150 val = 151 le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]); 152 energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >> 153 IWL_RX_INFO_ENERGY_ANT_A_POS; 154 energy_a = energy_a ? -energy_a : S8_MIN; 155 energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >> 156 IWL_RX_INFO_ENERGY_ANT_B_POS; 157 energy_b = energy_b ? -energy_b : S8_MIN; 158 energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >> 159 IWL_RX_INFO_ENERGY_ANT_C_POS; 160 energy_c = energy_c ? -energy_c : S8_MIN; 161 max_energy = max(energy_a, energy_b); 162 max_energy = max(max_energy, energy_c); 163 164 IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n", 165 energy_a, energy_b, energy_c, max_energy); 166 167 rx_status->signal = max_energy; 168 rx_status->chains = (le16_to_cpu(phy_info->phy_flags) & 169 RX_RES_PHY_FLAGS_ANTENNA) 170 >> RX_RES_PHY_FLAGS_ANTENNA_POS; 171 rx_status->chain_signal[0] = energy_a; 172 rx_status->chain_signal[1] = energy_b; 173 rx_status->chain_signal[2] = energy_c; 174} 175 176/* 177 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format 178 * @mvm: the mvm object 179 * @hdr: 80211 header 180 * @stats: status in mac80211's format 181 * @rx_pkt_status: status coming from fw 182 * 183 * returns non 0 value if the packet should be dropped 184 */ 185static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm, 186 struct ieee80211_hdr *hdr, 187 struct ieee80211_rx_status *stats, 188 u32 rx_pkt_status) 189{ 190 if (!ieee80211_has_protected(hdr->frame_control) || 191 (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 192 RX_MPDU_RES_STATUS_SEC_NO_ENC) 193 return 0; 194 195 /* packet was encrypted with unknown alg */ 196 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == 197 RX_MPDU_RES_STATUS_SEC_ENC_ERR) 198 return 0; 199 200 switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) { 201 case RX_MPDU_RES_STATUS_SEC_CCM_ENC: 202 /* alg is CCM: check MIC only */ 203 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) 204 return -1; 205 206 stats->flag |= RX_FLAG_DECRYPTED; 207 IWL_DEBUG_WEP(mvm, "hw decrypted CCMP successfully\n"); 208 return 0; 209 210 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC: 211 /* Don't drop the frame and decrypt it in SW */ 212 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK)) 213 return 0; 214 /* fall through if TTAK OK */ 215 216 case RX_MPDU_RES_STATUS_SEC_WEP_ENC: 217 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK)) 218 return -1; 219 220 stats->flag |= RX_FLAG_DECRYPTED; 221 return 0; 222 223 case RX_MPDU_RES_STATUS_SEC_EXT_ENC: 224 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) 225 return -1; 226 stats->flag |= RX_FLAG_DECRYPTED; 227 return 0; 228 229 default: 230 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); 231 } 232 233 return 0; 234} 235 236/* 237 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler 238 * 239 * Handles the actual data of the Rx packet from the fw 240 */ 241int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, 242 struct iwl_device_cmd *cmd) 243{ 244 struct ieee80211_hdr *hdr; 245 struct ieee80211_rx_status rx_status = {}; 246 struct iwl_rx_packet *pkt = rxb_addr(rxb); 247 struct iwl_rx_phy_info *phy_info; 248 struct iwl_rx_mpdu_res_start *rx_res; 249 struct ieee80211_sta *sta; 250 u32 len; 251 u32 ampdu_status; 252 u32 rate_n_flags; 253 u32 rx_pkt_status; 254 255 phy_info = &mvm->last_phy_info; 256 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; 257 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); 258 len = le16_to_cpu(rx_res->byte_count); 259 rx_pkt_status = le32_to_cpup((__le32 *) 260 (pkt->data + sizeof(*rx_res) + len)); 261 262 memset(&rx_status, 0, sizeof(rx_status)); 263 264 /* 265 * drop the packet if it has failed being decrypted by HW 266 */ 267 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, &rx_status, rx_pkt_status)) { 268 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", 269 rx_pkt_status); 270 return 0; 271 } 272 273 if ((unlikely(phy_info->cfg_phy_cnt > 20))) { 274 IWL_DEBUG_DROP(mvm, "dsp size out of range [0,20]: %d\n", 275 phy_info->cfg_phy_cnt); 276 return 0; 277 } 278 279 /* 280 * Keep packets with CRC errors (and with overrun) for monitor mode 281 * (otherwise the firmware discards them) but mark them as bad. 282 */ 283 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || 284 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { 285 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); 286 rx_status.flag |= RX_FLAG_FAILED_FCS_CRC; 287 } 288 289 /* This will be used in several places later */ 290 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); 291 292 /* rx_status carries information about the packet to mac80211 */ 293 rx_status.mactime = le64_to_cpu(phy_info->timestamp); 294 rx_status.device_timestamp = le32_to_cpu(phy_info->system_timestamp); 295 rx_status.band = 296 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? 297 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; 298 rx_status.freq = 299 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), 300 rx_status.band); 301 /* 302 * TSF as indicated by the fw is at INA time, but mac80211 expects the 303 * TSF at the beginning of the MPDU. 304 */ 305 /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/ 306 307 iwl_mvm_get_signal_strength(mvm, phy_info, &rx_status); 308 309 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status.signal, 310 (unsigned long long)rx_status.mactime); 311 312 rcu_read_lock(); 313 /* 314 * We have tx blocked stations (with CS bit). If we heard frames from 315 * a blocked station on a new channel we can TX to it again. 316 */ 317 if (unlikely(mvm->csa_tx_block_bcn_timeout)) { 318 sta = ieee80211_find_sta( 319 rcu_dereference(mvm->csa_tx_blocked_vif), hdr->addr2); 320 if (sta) 321 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false); 322 } 323 324 /* This is fine since we don't support multiple AP interfaces */ 325 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); 326 if (sta) { 327 struct iwl_mvm_sta *mvmsta; 328 mvmsta = iwl_mvm_sta_from_mac80211(sta); 329 rs_update_last_rssi(mvm, &mvmsta->lq_sta, 330 &rx_status); 331 } 332 333 rcu_read_unlock(); 334 335 /* set the preamble flag if appropriate */ 336 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) 337 rx_status.flag |= RX_FLAG_SHORTPRE; 338 339 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { 340 /* 341 * We know which subframes of an A-MPDU belong 342 * together since we get a single PHY response 343 * from the firmware for all of them 344 */ 345 rx_status.flag |= RX_FLAG_AMPDU_DETAILS; 346 rx_status.ampdu_reference = mvm->ampdu_ref; 347 } 348 349 /* Set up the HT phy flags */ 350 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { 351 case RATE_MCS_CHAN_WIDTH_20: 352 break; 353 case RATE_MCS_CHAN_WIDTH_40: 354 rx_status.flag |= RX_FLAG_40MHZ; 355 break; 356 case RATE_MCS_CHAN_WIDTH_80: 357 rx_status.vht_flag |= RX_VHT_FLAG_80MHZ; 358 break; 359 case RATE_MCS_CHAN_WIDTH_160: 360 rx_status.vht_flag |= RX_VHT_FLAG_160MHZ; 361 break; 362 } 363 if (rate_n_flags & RATE_MCS_SGI_MSK) 364 rx_status.flag |= RX_FLAG_SHORT_GI; 365 if (rate_n_flags & RATE_HT_MCS_GF_MSK) 366 rx_status.flag |= RX_FLAG_HT_GF; 367 if (rate_n_flags & RATE_MCS_LDPC_MSK) 368 rx_status.flag |= RX_FLAG_LDPC; 369 if (rate_n_flags & RATE_MCS_HT_MSK) { 370 u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >> 371 RATE_MCS_STBC_POS; 372 rx_status.flag |= RX_FLAG_HT; 373 rx_status.rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; 374 rx_status.flag |= stbc << RX_FLAG_STBC_SHIFT; 375 } else if (rate_n_flags & RATE_MCS_VHT_MSK) { 376 u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >> 377 RATE_MCS_STBC_POS; 378 rx_status.vht_nss = 379 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> 380 RATE_VHT_MCS_NSS_POS) + 1; 381 rx_status.rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; 382 rx_status.flag |= RX_FLAG_VHT; 383 rx_status.flag |= stbc << RX_FLAG_STBC_SHIFT; 384 if (rate_n_flags & RATE_MCS_BF_MSK) 385 rx_status.vht_flag |= RX_VHT_FLAG_BF; 386 } else { 387 rx_status.rate_idx = 388 iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, 389 rx_status.band); 390 } 391 392#ifdef CONFIG_IWLWIFI_DEBUGFS 393 iwl_mvm_update_frame_stats(mvm, &mvm->drv_rx_stats, rate_n_flags, 394 rx_status.flag & RX_FLAG_AMPDU_DETAILS); 395#endif 396 iwl_mvm_pass_packet_to_mac80211(mvm, hdr, len, ampdu_status, 397 rxb, &rx_status); 398 return 0; 399} 400 401static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm, 402 struct iwl_notif_statistics *stats) 403{ 404 /* 405 * NOTE FW aggregates the statistics - BUT the statistics are cleared 406 * when the driver issues REPLY_STATISTICS_CMD 0x9c with CLEAR_STATS 407 * bit set. 408 */ 409 lockdep_assert_held(&mvm->mutex); 410 memcpy(&mvm->rx_stats, &stats->rx, sizeof(struct mvm_statistics_rx)); 411} 412 413struct iwl_mvm_stat_data { 414 struct iwl_notif_statistics *stats; 415 struct iwl_mvm *mvm; 416}; 417 418static void iwl_mvm_stat_iterator(void *_data, u8 *mac, 419 struct ieee80211_vif *vif) 420{ 421 struct iwl_mvm_stat_data *data = _data; 422 struct iwl_notif_statistics *stats = data->stats; 423 struct iwl_mvm *mvm = data->mvm; 424 int sig = -stats->general.beacon_filter_average_energy; 425 int last_event; 426 int thold = vif->bss_conf.cqm_rssi_thold; 427 int hyst = vif->bss_conf.cqm_rssi_hyst; 428 u16 id = le32_to_cpu(stats->rx.general.mac_id); 429 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 430 431 if (mvmvif->id != id) 432 return; 433 434 if (vif->type != NL80211_IFTYPE_STATION) 435 return; 436 437 mvmvif->bf_data.ave_beacon_signal = sig; 438 439 /* BT Coex */ 440 if (mvmvif->bf_data.bt_coex_min_thold != 441 mvmvif->bf_data.bt_coex_max_thold) { 442 last_event = mvmvif->bf_data.last_bt_coex_event; 443 if (sig > mvmvif->bf_data.bt_coex_max_thold && 444 (last_event <= mvmvif->bf_data.bt_coex_min_thold || 445 last_event == 0)) { 446 mvmvif->bf_data.last_bt_coex_event = sig; 447 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", 448 sig); 449 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); 450 } else if (sig < mvmvif->bf_data.bt_coex_min_thold && 451 (last_event >= mvmvif->bf_data.bt_coex_max_thold || 452 last_event == 0)) { 453 mvmvif->bf_data.last_bt_coex_event = sig; 454 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", 455 sig); 456 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); 457 } 458 } 459 460 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) 461 return; 462 463 /* CQM Notification */ 464 last_event = mvmvif->bf_data.last_cqm_event; 465 if (thold && sig < thold && (last_event == 0 || 466 sig < last_event - hyst)) { 467 mvmvif->bf_data.last_cqm_event = sig; 468 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", 469 sig); 470 ieee80211_cqm_rssi_notify( 471 vif, 472 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 473 GFP_KERNEL); 474 } else if (sig > thold && 475 (last_event == 0 || sig > last_event + hyst)) { 476 mvmvif->bf_data.last_cqm_event = sig; 477 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", 478 sig); 479 ieee80211_cqm_rssi_notify( 480 vif, 481 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 482 GFP_KERNEL); 483 } 484} 485 486/* 487 * iwl_mvm_rx_statistics - STATISTICS_NOTIFICATION handler 488 * 489 * TODO: This handler is implemented partially. 490 */ 491int iwl_mvm_rx_statistics(struct iwl_mvm *mvm, 492 struct iwl_rx_cmd_buffer *rxb, 493 struct iwl_device_cmd *cmd) 494{ 495 struct iwl_rx_packet *pkt = rxb_addr(rxb); 496 struct iwl_notif_statistics *stats = (void *)&pkt->data; 497 struct mvm_statistics_general_common *common = &stats->general.common; 498 struct iwl_mvm_stat_data data = { 499 .stats = stats, 500 .mvm = mvm, 501 }; 502 503 /* 504 * set temperature debug enabled - ignore FW temperature updates 505 * and use the user set temperature. 506 */ 507 if (mvm->temperature_test) { 508 if (mvm->temperature < le32_to_cpu(common->temperature)) 509 IWL_DEBUG_TEMP(mvm, 510 "Ignoring FW temperature update that is greater than the debug set temperature (debug temp = %d, fw temp = %d)\n", 511 mvm->temperature, 512 le32_to_cpu(common->temperature)); 513 /* 514 * skip iwl_mvm_tt_handler since we are in 515 * temperature debug mode and we are ignoring 516 * the new temperature value 517 */ 518 goto update; 519 } 520 521 if (mvm->temperature != le32_to_cpu(common->temperature)) { 522 mvm->temperature = le32_to_cpu(common->temperature); 523 iwl_mvm_tt_handler(mvm); 524 } 525update: 526 iwl_mvm_update_rx_statistics(mvm, stats); 527 528 ieee80211_iterate_active_interfaces(mvm->hw, 529 IEEE80211_IFACE_ITER_NORMAL, 530 iwl_mvm_stat_iterator, 531 &data); 532 return 0; 533} 534