1 /******************************************************************************
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.
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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.
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.
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,
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
28 * Contact Information:
29 * Intel Linux Wireless <ilw@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
36 * All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
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
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.
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"
69 * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler
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.
74 int iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
75 struct iwl_device_cmd *cmd)
77 struct iwl_rx_packet *pkt = rxb_addr(rxb);
79 memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info));
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);
94 * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
96 * Adds the rxb to a new skb and give it to mac80211
98 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
99 struct ieee80211_hdr *hdr, u16 len,
101 struct iwl_rx_cmd_buffer *rxb,
102 struct ieee80211_rx_status *stats)
105 unsigned int hdrlen, fraglen;
107 /* Dont use dev_alloc_skb(), we'll have enough headroom once
108 * ieee80211_hdr pulled.
110 skb = alloc_skb(128, GFP_ATOMIC);
112 IWL_ERR(mvm, "alloc_skb failed\n");
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.
119 hdrlen = (len <= skb_tailroom(skb)) ? len : sizeof(*hdr);
121 memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
122 fraglen = len - hdrlen;
125 int offset = (void *)hdr + hdrlen -
126 rxb_addr(rxb) + rxb_offset(rxb);
128 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
129 fraglen, rxb->truesize);
132 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
134 ieee80211_rx(mvm->hw, skb);
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.
143 static 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)
147 int energy_a, energy_b, energy_c, max_energy;
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);
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);
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;
177 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
178 * @mvm: the mvm object
180 * @stats: status in mac80211's format
181 * @rx_pkt_status: status coming from fw
183 * returns non 0 value if the packet should be dropped
185 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm,
186 struct ieee80211_hdr *hdr,
187 struct ieee80211_rx_status *stats,
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)
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)
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))
206 stats->flag |= RX_FLAG_DECRYPTED;
207 IWL_DEBUG_WEP(mvm, "hw decrypted CCMP successfully\n");
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))
214 /* fall through if TTAK OK */
216 case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
217 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
220 stats->flag |= RX_FLAG_DECRYPTED;
223 case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
224 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
226 stats->flag |= RX_FLAG_DECRYPTED;
230 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
237 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
239 * Handles the actual data of the Rx packet from the fw
241 int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
242 struct iwl_device_cmd *cmd)
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;
254 phy_info = &mvm->last_phy_info;
255 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
256 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
257 len = le16_to_cpu(rx_res->byte_count);
258 rx_pkt_status = le32_to_cpup((__le32 *)
259 (pkt->data + sizeof(*rx_res) + len));
261 memset(&rx_status, 0, sizeof(rx_status));
264 * We have tx blocked stations (with CS bit). If we heard frames from
265 * a blocked station on a new channel we can TX to it again.
267 if (unlikely(mvm->csa_tx_block_bcn_timeout)) {
268 struct ieee80211_sta *sta;
272 sta = ieee80211_find_sta(
273 rcu_dereference(mvm->csa_tx_blocked_vif), hdr->addr2);
275 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);
281 * drop the packet if it has failed being decrypted by HW
283 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, &rx_status, rx_pkt_status)) {
284 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
289 if ((unlikely(phy_info->cfg_phy_cnt > 20))) {
290 IWL_DEBUG_DROP(mvm, "dsp size out of range [0,20]: %d\n",
291 phy_info->cfg_phy_cnt);
296 * Keep packets with CRC errors (and with overrun) for monitor mode
297 * (otherwise the firmware discards them) but mark them as bad.
299 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
300 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
301 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
302 rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
305 /* This will be used in several places later */
306 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
308 /* rx_status carries information about the packet to mac80211 */
309 rx_status.mactime = le64_to_cpu(phy_info->timestamp);
310 rx_status.device_timestamp = le32_to_cpu(phy_info->system_timestamp);
312 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
313 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
315 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
318 * TSF as indicated by the fw is at INA time, but mac80211 expects the
319 * TSF at the beginning of the MPDU.
321 /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/
323 iwl_mvm_get_signal_strength(mvm, phy_info, &rx_status);
325 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status.signal,
326 (unsigned long long)rx_status.mactime);
328 /* set the preamble flag if appropriate */
329 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
330 rx_status.flag |= RX_FLAG_SHORTPRE;
332 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
334 * We know which subframes of an A-MPDU belong
335 * together since we get a single PHY response
336 * from the firmware for all of them
338 rx_status.flag |= RX_FLAG_AMPDU_DETAILS;
339 rx_status.ampdu_reference = mvm->ampdu_ref;
342 /* Set up the HT phy flags */
343 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
344 case RATE_MCS_CHAN_WIDTH_20:
346 case RATE_MCS_CHAN_WIDTH_40:
347 rx_status.flag |= RX_FLAG_40MHZ;
349 case RATE_MCS_CHAN_WIDTH_80:
350 rx_status.vht_flag |= RX_VHT_FLAG_80MHZ;
352 case RATE_MCS_CHAN_WIDTH_160:
353 rx_status.vht_flag |= RX_VHT_FLAG_160MHZ;
356 if (rate_n_flags & RATE_MCS_SGI_MSK)
357 rx_status.flag |= RX_FLAG_SHORT_GI;
358 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
359 rx_status.flag |= RX_FLAG_HT_GF;
360 if (rate_n_flags & RATE_MCS_LDPC_MSK)
361 rx_status.flag |= RX_FLAG_LDPC;
362 if (rate_n_flags & RATE_MCS_HT_MSK) {
363 u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
365 rx_status.flag |= RX_FLAG_HT;
366 rx_status.rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
367 rx_status.flag |= stbc << RX_FLAG_STBC_SHIFT;
368 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
369 u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >>
372 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
373 RATE_VHT_MCS_NSS_POS) + 1;
374 rx_status.rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
375 rx_status.flag |= RX_FLAG_VHT;
376 rx_status.flag |= stbc << RX_FLAG_STBC_SHIFT;
377 if (rate_n_flags & RATE_MCS_BF_MSK)
378 rx_status.vht_flag |= RX_VHT_FLAG_BF;
381 iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
385 #ifdef CONFIG_IWLWIFI_DEBUGFS
386 iwl_mvm_update_frame_stats(mvm, &mvm->drv_rx_stats, rate_n_flags,
387 rx_status.flag & RX_FLAG_AMPDU_DETAILS);
389 iwl_mvm_pass_packet_to_mac80211(mvm, hdr, len, ampdu_status,
394 static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm,
395 struct iwl_notif_statistics *stats)
398 * NOTE FW aggregates the statistics - BUT the statistics are cleared
399 * when the driver issues REPLY_STATISTICS_CMD 0x9c with CLEAR_STATS
402 lockdep_assert_held(&mvm->mutex);
403 memcpy(&mvm->rx_stats, &stats->rx, sizeof(struct mvm_statistics_rx));
406 struct iwl_mvm_stat_data {
407 struct iwl_notif_statistics *stats;
411 static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
412 struct ieee80211_vif *vif)
414 struct iwl_mvm_stat_data *data = _data;
415 struct iwl_notif_statistics *stats = data->stats;
416 struct iwl_mvm *mvm = data->mvm;
417 int sig = -stats->general.beacon_filter_average_energy;
419 int thold = vif->bss_conf.cqm_rssi_thold;
420 int hyst = vif->bss_conf.cqm_rssi_hyst;
421 u16 id = le32_to_cpu(stats->rx.general.mac_id);
422 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
424 if (mvmvif->id != id)
427 if (vif->type != NL80211_IFTYPE_STATION)
430 mvmvif->bf_data.ave_beacon_signal = sig;
433 if (mvmvif->bf_data.bt_coex_min_thold !=
434 mvmvif->bf_data.bt_coex_max_thold) {
435 last_event = mvmvif->bf_data.last_bt_coex_event;
436 if (sig > mvmvif->bf_data.bt_coex_max_thold &&
437 (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
439 mvmvif->bf_data.last_bt_coex_event = sig;
440 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
442 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
443 } else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
444 (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
446 mvmvif->bf_data.last_bt_coex_event = sig;
447 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
449 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
453 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
456 /* CQM Notification */
457 last_event = mvmvif->bf_data.last_cqm_event;
458 if (thold && sig < thold && (last_event == 0 ||
459 sig < last_event - hyst)) {
460 mvmvif->bf_data.last_cqm_event = sig;
461 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
463 ieee80211_cqm_rssi_notify(
465 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
467 } else if (sig > thold &&
468 (last_event == 0 || sig > last_event + hyst)) {
469 mvmvif->bf_data.last_cqm_event = sig;
470 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
472 ieee80211_cqm_rssi_notify(
474 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
480 * iwl_mvm_rx_statistics - STATISTICS_NOTIFICATION handler
482 * TODO: This handler is implemented partially.
484 int iwl_mvm_rx_statistics(struct iwl_mvm *mvm,
485 struct iwl_rx_cmd_buffer *rxb,
486 struct iwl_device_cmd *cmd)
488 struct iwl_rx_packet *pkt = rxb_addr(rxb);
489 struct iwl_notif_statistics *stats = (void *)&pkt->data;
490 struct mvm_statistics_general_common *common = &stats->general.common;
491 struct iwl_mvm_stat_data data = {
497 * set temperature debug enabled - ignore FW temperature updates
498 * and use the user set temperature.
500 if (mvm->temperature_test) {
501 if (mvm->temperature < le32_to_cpu(common->temperature))
503 "Ignoring FW temperature update that is greater than the debug set temperature (debug temp = %d, fw temp = %d)\n",
505 le32_to_cpu(common->temperature));
507 * skip iwl_mvm_tt_handler since we are in
508 * temperature debug mode and we are ignoring
509 * the new temperature value
514 if (mvm->temperature != le32_to_cpu(common->temperature)) {
515 mvm->temperature = le32_to_cpu(common->temperature);
516 iwl_mvm_tt_handler(mvm);
519 iwl_mvm_update_rx_statistics(mvm, stats);
521 ieee80211_iterate_active_interfaces(mvm->hw,
522 IEEE80211_IFACE_ITER_NORMAL,
523 iwl_mvm_stat_iterator,