1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * USA
25 *
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
28 *
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32 *
33 * BSD LICENSE
34 *
35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
37 * All rights reserved.
38 *
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
41 * are met:
42 *
43 * * Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * * Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in
47 * the documentation and/or other materials provided with the
48 * distribution.
49 * * Neither the name Intel Corporation nor the names of its
50 * contributors may be used to endorse or promote products derived
51 * from this software without specific prior written permission.
52 *
53 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
54 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
55 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
56 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
57 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
58 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
59 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
60 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
61 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
62 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
63 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
64 *****************************************************************************/
65 #include <asm/unaligned.h>
66 #include <linux/etherdevice.h>
67 #include <linux/skbuff.h>
68 #include "iwl-trans.h"
69 #include "mvm.h"
70 #include "fw-api.h"
71
72 /*
73 * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler
74 *
75 * Copies the phy information in mvm->last_phy_info, it will be used when the
76 * actual data will come from the fw in the next packet.
77 */
iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)78 void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
79 {
80 struct iwl_rx_packet *pkt = rxb_addr(rxb);
81
82 memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info));
83 mvm->ampdu_ref++;
84
85 #ifdef CONFIG_IWLWIFI_DEBUGFS
86 if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
87 spin_lock(&mvm->drv_stats_lock);
88 mvm->drv_rx_stats.ampdu_count++;
89 spin_unlock(&mvm->drv_stats_lock);
90 }
91 #endif
92 }
93
94 /*
95 * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
96 *
97 * Adds the rxb to a new skb and give it to mac80211
98 */
iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm * mvm,struct ieee80211_sta * sta,struct napi_struct * napi,struct sk_buff * skb,struct ieee80211_hdr * hdr,u16 len,u8 crypt_len,struct iwl_rx_cmd_buffer * rxb)99 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
100 struct ieee80211_sta *sta,
101 struct napi_struct *napi,
102 struct sk_buff *skb,
103 struct ieee80211_hdr *hdr, u16 len,
104 u8 crypt_len,
105 struct iwl_rx_cmd_buffer *rxb)
106 {
107 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
108 unsigned int fraglen;
109
110 /*
111 * The 'hdrlen' (plus the 8 bytes for the SNAP and the crypt_len,
112 * but those are all multiples of 4 long) all goes away, but we
113 * want the *end* of it, which is going to be the start of the IP
114 * header, to be aligned when it gets pulled in.
115 * The beginning of the skb->data is aligned on at least a 4-byte
116 * boundary after allocation. Everything here is aligned at least
117 * on a 2-byte boundary so we can just take hdrlen & 3 and pad by
118 * the result.
119 */
120 skb_reserve(skb, hdrlen & 3);
121
122 /* If frame is small enough to fit in skb->head, pull it completely.
123 * If not, only pull ieee80211_hdr (including crypto if present, and
124 * an additional 8 bytes for SNAP/ethertype, see below) so that
125 * splice() or TCP coalesce are more efficient.
126 *
127 * Since, in addition, ieee80211_data_to_8023() always pull in at
128 * least 8 bytes (possibly more for mesh) we can do the same here
129 * to save the cost of doing it later. That still doesn't pull in
130 * the actual IP header since the typical case has a SNAP header.
131 * If the latter changes (there are efforts in the standards group
132 * to do so) we should revisit this and ieee80211_data_to_8023().
133 */
134 hdrlen = (len <= skb_tailroom(skb)) ? len : hdrlen + crypt_len + 8;
135
136 skb_put_data(skb, hdr, hdrlen);
137 fraglen = len - hdrlen;
138
139 if (fraglen) {
140 int offset = (void *)hdr + hdrlen -
141 rxb_addr(rxb) + rxb_offset(rxb);
142
143 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
144 fraglen, rxb->truesize);
145 }
146
147 ieee80211_rx_napi(mvm->hw, sta, skb, napi);
148 }
149
150 /*
151 * iwl_mvm_get_signal_strength - use new rx PHY INFO API
152 * values are reported by the fw as positive values - need to negate
153 * to obtain their dBM. Account for missing antennas by replacing 0
154 * values by -256dBm: practically 0 power and a non-feasible 8 bit value.
155 */
iwl_mvm_get_signal_strength(struct iwl_mvm * mvm,struct iwl_rx_phy_info * phy_info,struct ieee80211_rx_status * rx_status)156 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
157 struct iwl_rx_phy_info *phy_info,
158 struct ieee80211_rx_status *rx_status)
159 {
160 int energy_a, energy_b, energy_c, max_energy;
161 u32 val;
162
163 val =
164 le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]);
165 energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >>
166 IWL_RX_INFO_ENERGY_ANT_A_POS;
167 energy_a = energy_a ? -energy_a : S8_MIN;
168 energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >>
169 IWL_RX_INFO_ENERGY_ANT_B_POS;
170 energy_b = energy_b ? -energy_b : S8_MIN;
171 energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >>
172 IWL_RX_INFO_ENERGY_ANT_C_POS;
173 energy_c = energy_c ? -energy_c : S8_MIN;
174 max_energy = max(energy_a, energy_b);
175 max_energy = max(max_energy, energy_c);
176
177 IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n",
178 energy_a, energy_b, energy_c, max_energy);
179
180 rx_status->signal = max_energy;
181 rx_status->chains = (le16_to_cpu(phy_info->phy_flags) &
182 RX_RES_PHY_FLAGS_ANTENNA)
183 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
184 rx_status->chain_signal[0] = energy_a;
185 rx_status->chain_signal[1] = energy_b;
186 rx_status->chain_signal[2] = energy_c;
187 }
188
189 /*
190 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
191 * @mvm: the mvm object
192 * @hdr: 80211 header
193 * @stats: status in mac80211's format
194 * @rx_pkt_status: status coming from fw
195 *
196 * returns non 0 value if the packet should be dropped
197 */
iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm * mvm,struct ieee80211_hdr * hdr,struct ieee80211_rx_status * stats,u32 rx_pkt_status,u8 * crypt_len)198 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm,
199 struct ieee80211_hdr *hdr,
200 struct ieee80211_rx_status *stats,
201 u32 rx_pkt_status,
202 u8 *crypt_len)
203 {
204 if (!ieee80211_has_protected(hdr->frame_control) ||
205 (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
206 RX_MPDU_RES_STATUS_SEC_NO_ENC)
207 return 0;
208
209 /* packet was encrypted with unknown alg */
210 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
211 RX_MPDU_RES_STATUS_SEC_ENC_ERR)
212 return 0;
213
214 switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) {
215 case RX_MPDU_RES_STATUS_SEC_CCM_ENC:
216 /* alg is CCM: check MIC only */
217 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
218 return -1;
219
220 stats->flag |= RX_FLAG_DECRYPTED;
221 *crypt_len = IEEE80211_CCMP_HDR_LEN;
222 return 0;
223
224 case RX_MPDU_RES_STATUS_SEC_TKIP_ENC:
225 /* Don't drop the frame and decrypt it in SW */
226 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
227 return 0;
228 *crypt_len = IEEE80211_TKIP_IV_LEN;
229 /* fall through if TTAK OK */
230
231 case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
232 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
233 return -1;
234
235 stats->flag |= RX_FLAG_DECRYPTED;
236 if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
237 RX_MPDU_RES_STATUS_SEC_WEP_ENC)
238 *crypt_len = IEEE80211_WEP_IV_LEN;
239 return 0;
240
241 case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
242 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
243 return -1;
244 stats->flag |= RX_FLAG_DECRYPTED;
245 return 0;
246
247 default:
248 /* Expected in monitor (not having the keys) */
249 if (!mvm->monitor_on)
250 IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
251 }
252
253 return 0;
254 }
255
iwl_mvm_rx_csum(struct ieee80211_sta * sta,struct sk_buff * skb,u32 status)256 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
257 struct sk_buff *skb,
258 u32 status)
259 {
260 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
261 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
262
263 if (mvmvif->features & NETIF_F_RXCSUM &&
264 status & RX_MPDU_RES_STATUS_CSUM_DONE &&
265 status & RX_MPDU_RES_STATUS_CSUM_OK)
266 skb->ip_summed = CHECKSUM_UNNECESSARY;
267 }
268
269 /*
270 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
271 *
272 * Handles the actual data of the Rx packet from the fw
273 */
iwl_mvm_rx_rx_mpdu(struct iwl_mvm * mvm,struct napi_struct * napi,struct iwl_rx_cmd_buffer * rxb)274 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
275 struct iwl_rx_cmd_buffer *rxb)
276 {
277 struct ieee80211_hdr *hdr;
278 struct ieee80211_rx_status *rx_status;
279 struct iwl_rx_packet *pkt = rxb_addr(rxb);
280 struct iwl_rx_phy_info *phy_info;
281 struct iwl_rx_mpdu_res_start *rx_res;
282 struct ieee80211_sta *sta = NULL;
283 struct sk_buff *skb;
284 u32 len;
285 u32 rate_n_flags;
286 u32 rx_pkt_status;
287 u8 crypt_len = 0;
288 bool take_ref;
289
290 phy_info = &mvm->last_phy_info;
291 rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
292 hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
293 len = le16_to_cpu(rx_res->byte_count);
294 rx_pkt_status = get_unaligned_le32((__le32 *)
295 (pkt->data + sizeof(*rx_res) + len));
296
297 /* Dont use dev_alloc_skb(), we'll have enough headroom once
298 * ieee80211_hdr pulled.
299 */
300 skb = alloc_skb(128, GFP_ATOMIC);
301 if (!skb) {
302 IWL_ERR(mvm, "alloc_skb failed\n");
303 return;
304 }
305
306 rx_status = IEEE80211_SKB_RXCB(skb);
307
308 /*
309 * drop the packet if it has failed being decrypted by HW
310 */
311 if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
312 &crypt_len)) {
313 IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
314 rx_pkt_status);
315 kfree_skb(skb);
316 return;
317 }
318
319 /*
320 * Keep packets with CRC errors (and with overrun) for monitor mode
321 * (otherwise the firmware discards them) but mark them as bad.
322 */
323 if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
324 !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
325 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
326 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
327 }
328
329 /* This will be used in several places later */
330 rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
331
332 /* rx_status carries information about the packet to mac80211 */
333 rx_status->mactime = le64_to_cpu(phy_info->timestamp);
334 rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
335 rx_status->band =
336 (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
337 NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
338 rx_status->freq =
339 ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
340 rx_status->band);
341
342 /* TSF as indicated by the firmware is at INA time */
343 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
344
345 iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
346
347 IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
348 (unsigned long long)rx_status->mactime);
349
350 rcu_read_lock();
351 if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) {
352 u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK;
353
354 id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT;
355
356 if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) {
357 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
358 if (IS_ERR(sta))
359 sta = NULL;
360 }
361 } else if (!is_multicast_ether_addr(hdr->addr2)) {
362 /* This is fine since we prevent two stations with the same
363 * address from being added.
364 */
365 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
366 }
367
368 if (sta) {
369 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
370 struct ieee80211_vif *tx_blocked_vif =
371 rcu_dereference(mvm->csa_tx_blocked_vif);
372
373 /* We have tx blocked stations (with CS bit). If we heard
374 * frames from a blocked station on a new channel we can
375 * TX to it again.
376 */
377 if (unlikely(tx_blocked_vif) &&
378 mvmsta->vif == tx_blocked_vif) {
379 struct iwl_mvm_vif *mvmvif =
380 iwl_mvm_vif_from_mac80211(tx_blocked_vif);
381
382 if (mvmvif->csa_target_freq == rx_status->freq)
383 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
384 false);
385 }
386
387 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
388
389 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
390 ieee80211_is_beacon(hdr->frame_control)) {
391 struct iwl_fw_dbg_trigger_tlv *trig;
392 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
393 bool trig_check;
394 s32 rssi;
395
396 trig = iwl_fw_dbg_get_trigger(mvm->fw,
397 FW_DBG_TRIGGER_RSSI);
398 rssi_trig = (void *)trig->data;
399 rssi = le32_to_cpu(rssi_trig->rssi);
400
401 trig_check =
402 iwl_fw_dbg_trigger_check_stop(&mvm->fwrt,
403 ieee80211_vif_to_wdev(mvmsta->vif),
404 trig);
405 if (trig_check && rx_status->signal < rssi)
406 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
407 NULL);
408 }
409
410 if (ieee80211_is_data(hdr->frame_control))
411 iwl_mvm_rx_csum(sta, skb, rx_pkt_status);
412 }
413 rcu_read_unlock();
414
415 /* set the preamble flag if appropriate */
416 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
417 rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
418
419 if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
420 /*
421 * We know which subframes of an A-MPDU belong
422 * together since we get a single PHY response
423 * from the firmware for all of them
424 */
425 rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
426 rx_status->ampdu_reference = mvm->ampdu_ref;
427 }
428
429 /* Set up the HT phy flags */
430 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
431 case RATE_MCS_CHAN_WIDTH_20:
432 break;
433 case RATE_MCS_CHAN_WIDTH_40:
434 rx_status->bw = RATE_INFO_BW_40;
435 break;
436 case RATE_MCS_CHAN_WIDTH_80:
437 rx_status->bw = RATE_INFO_BW_80;
438 break;
439 case RATE_MCS_CHAN_WIDTH_160:
440 rx_status->bw = RATE_INFO_BW_160;
441 break;
442 }
443 if (!(rate_n_flags & RATE_MCS_CCK_MSK) &&
444 rate_n_flags & RATE_MCS_SGI_MSK)
445 rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
446 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
447 rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
448 if (rate_n_flags & RATE_MCS_LDPC_MSK)
449 rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
450 if (rate_n_flags & RATE_MCS_HT_MSK) {
451 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
452 RATE_MCS_STBC_POS;
453 rx_status->encoding = RX_ENC_HT;
454 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
455 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
456 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
457 u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
458 RATE_MCS_STBC_POS;
459 rx_status->nss =
460 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
461 RATE_VHT_MCS_NSS_POS) + 1;
462 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
463 rx_status->encoding = RX_ENC_VHT;
464 rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
465 if (rate_n_flags & RATE_MCS_BF_MSK)
466 rx_status->enc_flags |= RX_ENC_FLAG_BF;
467 } else {
468 int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
469 rx_status->band);
470
471 if (WARN(rate < 0 || rate > 0xFF,
472 "Invalid rate flags 0x%x, band %d,\n",
473 rate_n_flags, rx_status->band)) {
474 kfree_skb(skb);
475 return;
476 }
477 rx_status->rate_idx = rate;
478 }
479
480 #ifdef CONFIG_IWLWIFI_DEBUGFS
481 iwl_mvm_update_frame_stats(mvm, rate_n_flags,
482 rx_status->flag & RX_FLAG_AMPDU_DETAILS);
483 #endif
484
485 if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
486 ieee80211_is_probe_resp(hdr->frame_control)) &&
487 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED))
488 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
489
490 if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
491 ieee80211_is_probe_resp(hdr->frame_control)))
492 rx_status->boottime_ns = ktime_get_boot_ns();
493
494 /* Take a reference briefly to kick off a d0i3 entry delay so
495 * we can handle bursts of RX packets without toggling the
496 * state too often. But don't do this for beacons if we are
497 * going to idle because the beacon filtering changes we make
498 * cause the firmware to send us collateral beacons. */
499 take_ref = !(test_bit(STATUS_TRANS_GOING_IDLE, &mvm->trans->status) &&
500 ieee80211_is_beacon(hdr->frame_control));
501
502 if (take_ref)
503 iwl_mvm_ref(mvm, IWL_MVM_REF_RX);
504
505 iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len,
506 crypt_len, rxb);
507
508 if (take_ref)
509 iwl_mvm_unref(mvm, IWL_MVM_REF_RX);
510 }
511
512 struct iwl_mvm_stat_data {
513 struct iwl_mvm *mvm;
514 __le32 mac_id;
515 u8 beacon_filter_average_energy;
516 void *general;
517 };
518
iwl_mvm_stat_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)519 static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
520 struct ieee80211_vif *vif)
521 {
522 struct iwl_mvm_stat_data *data = _data;
523 struct iwl_mvm *mvm = data->mvm;
524 int sig = -data->beacon_filter_average_energy;
525 int last_event;
526 int thold = vif->bss_conf.cqm_rssi_thold;
527 int hyst = vif->bss_conf.cqm_rssi_hyst;
528 u16 id = le32_to_cpu(data->mac_id);
529 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
530
531 /* This doesn't need the MAC ID check since it's not taking the
532 * data copied into the "data" struct, but rather the data from
533 * the notification directly.
534 */
535 if (data->general) {
536 u16 vif_id = mvmvif->id;
537
538 if (iwl_mvm_is_cdb_supported(mvm)) {
539 struct mvm_statistics_general_cdb *general =
540 data->general;
541
542 mvmvif->beacon_stats.num_beacons =
543 le32_to_cpu(general->beacon_counter[vif_id]);
544 mvmvif->beacon_stats.avg_signal =
545 -general->beacon_average_energy[vif_id];
546 } else {
547 struct mvm_statistics_general_v8 *general =
548 data->general;
549
550 mvmvif->beacon_stats.num_beacons =
551 le32_to_cpu(general->beacon_counter[vif_id]);
552 mvmvif->beacon_stats.avg_signal =
553 -general->beacon_average_energy[vif_id];
554 }
555 }
556
557 if (mvmvif->id != id)
558 return;
559
560 if (vif->type != NL80211_IFTYPE_STATION)
561 return;
562
563 if (sig == 0) {
564 IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
565 return;
566 }
567
568 mvmvif->bf_data.ave_beacon_signal = sig;
569
570 /* BT Coex */
571 if (mvmvif->bf_data.bt_coex_min_thold !=
572 mvmvif->bf_data.bt_coex_max_thold) {
573 last_event = mvmvif->bf_data.last_bt_coex_event;
574 if (sig > mvmvif->bf_data.bt_coex_max_thold &&
575 (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
576 last_event == 0)) {
577 mvmvif->bf_data.last_bt_coex_event = sig;
578 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
579 sig);
580 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
581 } else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
582 (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
583 last_event == 0)) {
584 mvmvif->bf_data.last_bt_coex_event = sig;
585 IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
586 sig);
587 iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
588 }
589 }
590
591 if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
592 return;
593
594 /* CQM Notification */
595 last_event = mvmvif->bf_data.last_cqm_event;
596 if (thold && sig < thold && (last_event == 0 ||
597 sig < last_event - hyst)) {
598 mvmvif->bf_data.last_cqm_event = sig;
599 IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
600 sig);
601 ieee80211_cqm_rssi_notify(
602 vif,
603 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
604 sig,
605 GFP_KERNEL);
606 } else if (sig > thold &&
607 (last_event == 0 || sig > last_event + hyst)) {
608 mvmvif->bf_data.last_cqm_event = sig;
609 IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
610 sig);
611 ieee80211_cqm_rssi_notify(
612 vif,
613 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
614 sig,
615 GFP_KERNEL);
616 }
617 }
618
619 static inline void
iwl_mvm_rx_stats_check_trigger(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)620 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
621 {
622 struct iwl_fw_dbg_trigger_tlv *trig;
623 struct iwl_fw_dbg_trigger_stats *trig_stats;
624 u32 trig_offset, trig_thold;
625
626 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS))
627 return;
628
629 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS);
630 trig_stats = (void *)trig->data;
631
632 if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, NULL, trig))
633 return;
634
635 trig_offset = le32_to_cpu(trig_stats->stop_offset);
636 trig_thold = le32_to_cpu(trig_stats->stop_threshold);
637
638 if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
639 return;
640
641 if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
642 return;
643
644 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL);
645 }
646
iwl_mvm_handle_rx_statistics(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)647 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
648 struct iwl_rx_packet *pkt)
649 {
650 struct iwl_mvm_stat_data data = {
651 .mvm = mvm,
652 };
653 int expected_size;
654 int i;
655 u8 *energy;
656 __le32 *bytes, *air_time;
657 __le32 flags;
658
659 if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
660 if (iwl_mvm_has_new_rx_api(mvm))
661 expected_size = sizeof(struct iwl_notif_statistics_v11);
662 else
663 expected_size = sizeof(struct iwl_notif_statistics_v10);
664 } else {
665 expected_size = sizeof(struct iwl_notif_statistics_cdb);
666 }
667
668 if (iwl_rx_packet_payload_len(pkt) != expected_size) {
669 IWL_ERR(mvm, "received invalid statistics size (%d)!\n",
670 iwl_rx_packet_payload_len(pkt));
671 return;
672 }
673
674 if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
675 struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data;
676
677 data.mac_id = stats->rx.general.mac_id;
678 data.beacon_filter_average_energy =
679 stats->general.common.beacon_filter_average_energy;
680
681 mvm->rx_stats_v3 = stats->rx;
682
683 mvm->radio_stats.rx_time =
684 le64_to_cpu(stats->general.common.rx_time);
685 mvm->radio_stats.tx_time =
686 le64_to_cpu(stats->general.common.tx_time);
687 mvm->radio_stats.on_time_rf =
688 le64_to_cpu(stats->general.common.on_time_rf);
689 mvm->radio_stats.on_time_scan =
690 le64_to_cpu(stats->general.common.on_time_scan);
691
692 data.general = &stats->general;
693
694 flags = stats->flag;
695 } else {
696 struct iwl_notif_statistics_cdb *stats = (void *)&pkt->data;
697
698 data.mac_id = stats->rx.general.mac_id;
699 data.beacon_filter_average_energy =
700 stats->general.common.beacon_filter_average_energy;
701
702 mvm->rx_stats = stats->rx;
703
704 mvm->radio_stats.rx_time =
705 le64_to_cpu(stats->general.common.rx_time);
706 mvm->radio_stats.tx_time =
707 le64_to_cpu(stats->general.common.tx_time);
708 mvm->radio_stats.on_time_rf =
709 le64_to_cpu(stats->general.common.on_time_rf);
710 mvm->radio_stats.on_time_scan =
711 le64_to_cpu(stats->general.common.on_time_scan);
712
713 data.general = &stats->general;
714
715 flags = stats->flag;
716 }
717
718 iwl_mvm_rx_stats_check_trigger(mvm, pkt);
719
720 ieee80211_iterate_active_interfaces(mvm->hw,
721 IEEE80211_IFACE_ITER_NORMAL,
722 iwl_mvm_stat_iterator,
723 &data);
724
725 if (!iwl_mvm_has_new_rx_api(mvm))
726 return;
727
728 if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
729 struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data;
730
731 energy = (void *)&v11->load_stats.avg_energy;
732 bytes = (void *)&v11->load_stats.byte_count;
733 air_time = (void *)&v11->load_stats.air_time;
734 } else {
735 struct iwl_notif_statistics_cdb *stats = (void *)&pkt->data;
736
737 energy = (void *)&stats->load_stats.avg_energy;
738 bytes = (void *)&stats->load_stats.byte_count;
739 air_time = (void *)&stats->load_stats.air_time;
740 }
741
742 rcu_read_lock();
743 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
744 struct iwl_mvm_sta *sta;
745
746 if (!energy[i])
747 continue;
748
749 sta = iwl_mvm_sta_from_staid_rcu(mvm, i);
750 if (!sta)
751 continue;
752 sta->avg_energy = energy[i];
753 }
754 rcu_read_unlock();
755 }
756
iwl_mvm_rx_statistics(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)757 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
758 {
759 iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
760 }
761
iwl_mvm_window_status_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)762 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm,
763 struct iwl_rx_cmd_buffer *rxb)
764 {
765 struct iwl_rx_packet *pkt = rxb_addr(rxb);
766 struct iwl_ba_window_status_notif *notif = (void *)pkt->data;
767 int i;
768 u32 pkt_len = iwl_rx_packet_payload_len(pkt);
769
770 if (WARN_ONCE(pkt_len != sizeof(*notif),
771 "Received window status notification of wrong size (%u)\n",
772 pkt_len))
773 return;
774
775 rcu_read_lock();
776 for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) {
777 struct ieee80211_sta *sta;
778 u8 sta_id, tid;
779 u64 bitmap;
780 u32 ssn;
781 u16 ratid;
782 u16 received_mpdu;
783
784 ratid = le16_to_cpu(notif->ra_tid[i]);
785 /* check that this TID is valid */
786 if (!(ratid & BA_WINDOW_STATUS_VALID_MSK))
787 continue;
788
789 received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]);
790 if (received_mpdu == 0)
791 continue;
792
793 tid = ratid & BA_WINDOW_STATUS_TID_MSK;
794 /* get the station */
795 sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK)
796 >> BA_WINDOW_STATUS_STA_ID_POS;
797 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
798 if (IS_ERR_OR_NULL(sta))
799 continue;
800 bitmap = le64_to_cpu(notif->bitmap[i]);
801 ssn = le32_to_cpu(notif->start_seq_num[i]);
802
803 /* update mac80211 with the bitmap for the reordering buffer */
804 ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap,
805 received_mpdu);
806 }
807 rcu_read_unlock();
808 }
809