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8ca151b5 JB |
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 | * | |
51368bf7 | 8 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
777c9b6b | 9 | * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH |
3af512d6 | 10 | * Copyright(c) 2016 Intel Deutschland GmbH |
8ca151b5 JB |
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 | |
410dc5aa | 27 | * in the file called COPYING. |
8ca151b5 JB |
28 | * |
29 | * Contact Information: | |
cb2f8277 | 30 | * Intel Linux Wireless <linuxwifi@intel.com> |
8ca151b5 JB |
31 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
32 | * | |
33 | * BSD LICENSE | |
34 | * | |
51368bf7 | 35 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
777c9b6b | 36 | * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH |
8ca151b5 JB |
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 | *****************************************************************************/ | |
a399f980 | 65 | #include <linux/etherdevice.h> |
93190fb0 | 66 | #include <linux/skbuff.h> |
8ca151b5 | 67 | #include "iwl-trans.h" |
8ca151b5 JB |
68 | #include "mvm.h" |
69 | #include "fw-api.h" | |
2f89a5d7 | 70 | #include "fw-dbg.h" |
8ca151b5 JB |
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 | */ | |
0416841d | 78 | void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
8ca151b5 JB |
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++; | |
5fc0f76c ES |
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 | |
8ca151b5 JB |
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 | */ | |
99 | static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, | |
1be5d8cc | 100 | struct napi_struct *napi, |
d0963b5d | 101 | struct sk_buff *skb, |
8ca151b5 | 102 | struct ieee80211_hdr *hdr, u16 len, |
eb96ccb1 | 103 | u32 ampdu_status, u8 crypt_len, |
d0963b5d | 104 | struct iwl_rx_cmd_buffer *rxb) |
8ca151b5 | 105 | { |
8ca151b5 JB |
106 | unsigned int hdrlen, fraglen; |
107 | ||
8ca151b5 | 108 | /* If frame is small enough to fit in skb->head, pull it completely. |
3771a890 JB |
109 | * If not, only pull ieee80211_hdr (including crypto if present, and |
110 | * an additional 8 bytes for SNAP/ethertype, see below) so that | |
111 | * splice() or TCP coalesce are more efficient. | |
112 | * | |
113 | * Since, in addition, ieee80211_data_to_8023() always pull in at | |
114 | * least 8 bytes (possibly more for mesh) we can do the same here | |
115 | * to save the cost of doing it later. That still doesn't pull in | |
116 | * the actual IP header since the typical case has a SNAP header. | |
117 | * If the latter changes (there are efforts in the standards group | |
118 | * to do so) we should revisit this and ieee80211_data_to_8023(). | |
8ca151b5 | 119 | */ |
3771a890 JB |
120 | hdrlen = (len <= skb_tailroom(skb)) ? len : |
121 | sizeof(*hdr) + crypt_len + 8; | |
8ca151b5 JB |
122 | |
123 | memcpy(skb_put(skb, hdrlen), hdr, hdrlen); | |
124 | fraglen = len - hdrlen; | |
125 | ||
126 | if (fraglen) { | |
127 | int offset = (void *)hdr + hdrlen - | |
128 | rxb_addr(rxb) + rxb_offset(rxb); | |
129 | ||
130 | skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, | |
131 | fraglen, rxb->truesize); | |
132 | } | |
133 | ||
d63b548f | 134 | ieee80211_rx_napi(mvm->hw, NULL, skb, napi); |
8ca151b5 JB |
135 | } |
136 | ||
a2d7b870 AA |
137 | /* |
138 | * iwl_mvm_get_signal_strength - use new rx PHY INFO API | |
17dbe564 AA |
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. | |
a2d7b870 | 142 | */ |
226eb8cd JB |
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) | |
a2d7b870 AA |
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]); | |
17dbe564 AA |
152 | energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >> |
153 | IWL_RX_INFO_ENERGY_ANT_A_POS; | |
2cddddc5 | 154 | energy_a = energy_a ? -energy_a : S8_MIN; |
17dbe564 AA |
155 | energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >> |
156 | IWL_RX_INFO_ENERGY_ANT_B_POS; | |
2cddddc5 | 157 | energy_b = energy_b ? -energy_b : S8_MIN; |
17dbe564 AA |
158 | energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >> |
159 | IWL_RX_INFO_ENERGY_ANT_C_POS; | |
2cddddc5 | 160 | energy_c = energy_c ? -energy_c : S8_MIN; |
a2d7b870 AA |
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 | ||
226eb8cd JB |
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; | |
a2d7b870 AA |
174 | } |
175 | ||
8ca151b5 JB |
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 | */ | |
185 | static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm, | |
186 | struct ieee80211_hdr *hdr, | |
187 | struct ieee80211_rx_status *stats, | |
eb96ccb1 JB |
188 | u32 rx_pkt_status, |
189 | u8 *crypt_len) | |
8ca151b5 JB |
190 | { |
191 | if (!ieee80211_has_protected(hdr->frame_control) || | |
192 | (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == | |
193 | RX_MPDU_RES_STATUS_SEC_NO_ENC) | |
194 | return 0; | |
195 | ||
196 | /* packet was encrypted with unknown alg */ | |
197 | if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == | |
198 | RX_MPDU_RES_STATUS_SEC_ENC_ERR) | |
199 | return 0; | |
200 | ||
201 | switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) { | |
202 | case RX_MPDU_RES_STATUS_SEC_CCM_ENC: | |
203 | /* alg is CCM: check MIC only */ | |
204 | if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) | |
205 | return -1; | |
206 | ||
207 | stats->flag |= RX_FLAG_DECRYPTED; | |
eb96ccb1 | 208 | *crypt_len = IEEE80211_CCMP_HDR_LEN; |
8ca151b5 JB |
209 | return 0; |
210 | ||
211 | case RX_MPDU_RES_STATUS_SEC_TKIP_ENC: | |
212 | /* Don't drop the frame and decrypt it in SW */ | |
213 | if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK)) | |
214 | return 0; | |
eb96ccb1 | 215 | *crypt_len = IEEE80211_TKIP_IV_LEN; |
8ca151b5 JB |
216 | /* fall through if TTAK OK */ |
217 | ||
218 | case RX_MPDU_RES_STATUS_SEC_WEP_ENC: | |
219 | if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK)) | |
220 | return -1; | |
221 | ||
222 | stats->flag |= RX_FLAG_DECRYPTED; | |
eb96ccb1 JB |
223 | if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == |
224 | RX_MPDU_RES_STATUS_SEC_WEP_ENC) | |
225 | *crypt_len = IEEE80211_WEP_IV_LEN; | |
8ca151b5 JB |
226 | return 0; |
227 | ||
e36e5433 MS |
228 | case RX_MPDU_RES_STATUS_SEC_EXT_ENC: |
229 | if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) | |
230 | return -1; | |
231 | stats->flag |= RX_FLAG_DECRYPTED; | |
232 | return 0; | |
233 | ||
8ca151b5 JB |
234 | default: |
235 | IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); | |
236 | } | |
237 | ||
238 | return 0; | |
239 | } | |
240 | ||
93190fb0 AA |
241 | static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, |
242 | struct sk_buff *skb, | |
243 | u32 status) | |
244 | { | |
245 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
246 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); | |
247 | ||
248 | if (mvmvif->features & NETIF_F_RXCSUM && | |
249 | status & RX_MPDU_RES_STATUS_CSUM_DONE && | |
250 | status & RX_MPDU_RES_STATUS_CSUM_OK) | |
251 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
252 | } | |
253 | ||
8ca151b5 JB |
254 | /* |
255 | * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler | |
256 | * | |
257 | * Handles the actual data of the Rx packet from the fw | |
258 | */ | |
1be5d8cc JB |
259 | void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, |
260 | struct iwl_rx_cmd_buffer *rxb) | |
8ca151b5 JB |
261 | { |
262 | struct ieee80211_hdr *hdr; | |
d0963b5d | 263 | struct ieee80211_rx_status *rx_status; |
8ca151b5 JB |
264 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
265 | struct iwl_rx_phy_info *phy_info; | |
266 | struct iwl_rx_mpdu_res_start *rx_res; | |
a399f980 | 267 | struct ieee80211_sta *sta = NULL; |
d0963b5d | 268 | struct sk_buff *skb; |
8ca151b5 JB |
269 | u32 len; |
270 | u32 ampdu_status; | |
271 | u32 rate_n_flags; | |
272 | u32 rx_pkt_status; | |
eb96ccb1 | 273 | u8 crypt_len = 0; |
8ca151b5 JB |
274 | |
275 | phy_info = &mvm->last_phy_info; | |
276 | rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; | |
277 | hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); | |
278 | len = le16_to_cpu(rx_res->byte_count); | |
279 | rx_pkt_status = le32_to_cpup((__le32 *) | |
280 | (pkt->data + sizeof(*rx_res) + len)); | |
281 | ||
d0963b5d JB |
282 | /* Dont use dev_alloc_skb(), we'll have enough headroom once |
283 | * ieee80211_hdr pulled. | |
284 | */ | |
285 | skb = alloc_skb(128, GFP_ATOMIC); | |
286 | if (!skb) { | |
287 | IWL_ERR(mvm, "alloc_skb failed\n"); | |
0416841d | 288 | return; |
d0963b5d JB |
289 | } |
290 | ||
291 | rx_status = IEEE80211_SKB_RXCB(skb); | |
8ca151b5 JB |
292 | |
293 | /* | |
294 | * drop the packet if it has failed being decrypted by HW | |
295 | */ | |
eb96ccb1 JB |
296 | if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status, |
297 | &crypt_len)) { | |
8ca151b5 JB |
298 | IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", |
299 | rx_pkt_status); | |
d0963b5d | 300 | kfree_skb(skb); |
0416841d | 301 | return; |
8ca151b5 JB |
302 | } |
303 | ||
fb8b8ee1 JB |
304 | /* |
305 | * Keep packets with CRC errors (and with overrun) for monitor mode | |
306 | * (otherwise the firmware discards them) but mark them as bad. | |
307 | */ | |
8ca151b5 JB |
308 | if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || |
309 | !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { | |
310 | IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); | |
d0963b5d | 311 | rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; |
8ca151b5 JB |
312 | } |
313 | ||
314 | /* This will be used in several places later */ | |
315 | rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); | |
316 | ||
317 | /* rx_status carries information about the packet to mac80211 */ | |
d0963b5d JB |
318 | rx_status->mactime = le64_to_cpu(phy_info->timestamp); |
319 | rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp); | |
320 | rx_status->band = | |
8ca151b5 | 321 | (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? |
57fbcce3 | 322 | NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; |
d0963b5d | 323 | rx_status->freq = |
8ca151b5 | 324 | ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), |
d0963b5d | 325 | rx_status->band); |
77fe7395 SS |
326 | |
327 | /* TSF as indicated by the firmware is at INA time */ | |
328 | rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; | |
8ca151b5 | 329 | |
d0963b5d | 330 | iwl_mvm_get_signal_strength(mvm, phy_info, rx_status); |
8ca151b5 | 331 | |
d0963b5d JB |
332 | IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal, |
333 | (unsigned long long)rx_status->mactime); | |
8ca151b5 | 334 | |
361dbec8 | 335 | rcu_read_lock(); |
a399f980 JB |
336 | if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) { |
337 | u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK; | |
338 | ||
339 | id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT; | |
340 | ||
341 | if (!WARN_ON_ONCE(id >= IWL_MVM_STATION_COUNT)) { | |
342 | sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); | |
343 | if (IS_ERR(sta)) | |
344 | sta = NULL; | |
345 | } | |
346 | } else if (!is_multicast_ether_addr(hdr->addr2)) { | |
347 | /* This is fine since we prevent two stations with the same | |
348 | * address from being added. | |
349 | */ | |
350 | sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); | |
361dbec8 ES |
351 | } |
352 | ||
361dbec8 | 353 | if (sta) { |
7c0ebd78 JB |
354 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
355 | ||
a399f980 JB |
356 | /* We have tx blocked stations (with CS bit). If we heard |
357 | * frames from a blocked station on a new channel we can | |
358 | * TX to it again. | |
359 | */ | |
360 | if (unlikely(mvm->csa_tx_block_bcn_timeout)) | |
361 | iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false); | |
362 | ||
d0963b5d | 363 | rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status); |
3ec50b5e EG |
364 | |
365 | if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) && | |
366 | ieee80211_is_beacon(hdr->frame_control)) { | |
367 | struct iwl_fw_dbg_trigger_tlv *trig; | |
368 | struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; | |
369 | bool trig_check; | |
370 | s32 rssi; | |
371 | ||
372 | trig = iwl_fw_dbg_get_trigger(mvm->fw, | |
373 | FW_DBG_TRIGGER_RSSI); | |
374 | rssi_trig = (void *)trig->data; | |
375 | rssi = le32_to_cpu(rssi_trig->rssi); | |
376 | ||
377 | trig_check = | |
378 | iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif, | |
379 | trig); | |
380 | if (trig_check && rx_status->signal < rssi) | |
5d4f929e | 381 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL); |
3ec50b5e | 382 | } |
93190fb0 | 383 | |
a399f980 JB |
384 | if (ieee80211_is_data(hdr->frame_control)) |
385 | iwl_mvm_rx_csum(sta, skb, rx_pkt_status); | |
386 | } | |
361dbec8 ES |
387 | rcu_read_unlock(); |
388 | ||
8ca151b5 JB |
389 | /* set the preamble flag if appropriate */ |
390 | if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) | |
d0963b5d | 391 | rx_status->flag |= RX_FLAG_SHORTPRE; |
8ca151b5 JB |
392 | |
393 | if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { | |
394 | /* | |
395 | * We know which subframes of an A-MPDU belong | |
396 | * together since we get a single PHY response | |
397 | * from the firmware for all of them | |
398 | */ | |
d0963b5d JB |
399 | rx_status->flag |= RX_FLAG_AMPDU_DETAILS; |
400 | rx_status->ampdu_reference = mvm->ampdu_ref; | |
8ca151b5 JB |
401 | } |
402 | ||
403 | /* Set up the HT phy flags */ | |
404 | switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { | |
405 | case RATE_MCS_CHAN_WIDTH_20: | |
406 | break; | |
407 | case RATE_MCS_CHAN_WIDTH_40: | |
d0963b5d | 408 | rx_status->flag |= RX_FLAG_40MHZ; |
8ca151b5 JB |
409 | break; |
410 | case RATE_MCS_CHAN_WIDTH_80: | |
d0963b5d | 411 | rx_status->vht_flag |= RX_VHT_FLAG_80MHZ; |
8ca151b5 JB |
412 | break; |
413 | case RATE_MCS_CHAN_WIDTH_160: | |
d0963b5d | 414 | rx_status->vht_flag |= RX_VHT_FLAG_160MHZ; |
8ca151b5 JB |
415 | break; |
416 | } | |
417 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
d0963b5d | 418 | rx_status->flag |= RX_FLAG_SHORT_GI; |
8ca151b5 | 419 | if (rate_n_flags & RATE_HT_MCS_GF_MSK) |
d0963b5d | 420 | rx_status->flag |= RX_FLAG_HT_GF; |
7b1dd048 | 421 | if (rate_n_flags & RATE_MCS_LDPC_MSK) |
d0963b5d | 422 | rx_status->flag |= RX_FLAG_LDPC; |
8ca151b5 | 423 | if (rate_n_flags & RATE_MCS_HT_MSK) { |
7b1dd048 EG |
424 | u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >> |
425 | RATE_MCS_STBC_POS; | |
d0963b5d JB |
426 | rx_status->flag |= RX_FLAG_HT; |
427 | rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; | |
428 | rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT; | |
8ca151b5 | 429 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { |
7b1dd048 EG |
430 | u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >> |
431 | RATE_MCS_STBC_POS; | |
d0963b5d | 432 | rx_status->vht_nss = |
8ca151b5 JB |
433 | ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> |
434 | RATE_VHT_MCS_NSS_POS) + 1; | |
d0963b5d JB |
435 | rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; |
436 | rx_status->flag |= RX_FLAG_VHT; | |
437 | rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT; | |
95e05ab7 | 438 | if (rate_n_flags & RATE_MCS_BF_MSK) |
d0963b5d | 439 | rx_status->vht_flag |= RX_VHT_FLAG_BF; |
8ca151b5 | 440 | } else { |
d0963b5d | 441 | rx_status->rate_idx = |
8ca151b5 | 442 | iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, |
d0963b5d | 443 | rx_status->band); |
8ca151b5 JB |
444 | } |
445 | ||
5fc0f76c | 446 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
2f15a829 | 447 | iwl_mvm_update_frame_stats(mvm, rate_n_flags, |
d0963b5d | 448 | rx_status->flag & RX_FLAG_AMPDU_DETAILS); |
5fc0f76c | 449 | #endif |
a339e918 LC |
450 | |
451 | if (unlikely((ieee80211_is_beacon(hdr->frame_control) || | |
452 | ieee80211_is_probe_resp(hdr->frame_control)) && | |
453 | mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)) | |
454 | mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; | |
455 | ||
1be5d8cc | 456 | iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, hdr, len, ampdu_status, |
eb96ccb1 | 457 | crypt_len, rxb); |
8ca151b5 | 458 | } |
9ee718aa | 459 | |
3848ab66 | 460 | static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm, |
777c9b6b | 461 | struct mvm_statistics_rx *rx_stats) |
3848ab66 | 462 | { |
3848ab66 | 463 | lockdep_assert_held(&mvm->mutex); |
777c9b6b JB |
464 | |
465 | mvm->rx_stats = *rx_stats; | |
3848ab66 MG |
466 | } |
467 | ||
a20fd398 | 468 | struct iwl_mvm_stat_data { |
a20fd398 | 469 | struct iwl_mvm *mvm; |
777c9b6b | 470 | __le32 mac_id; |
62e004fe | 471 | u8 beacon_filter_average_energy; |
33cef925 | 472 | struct mvm_statistics_general_v8 *general; |
a20fd398 AO |
473 | }; |
474 | ||
475 | static void iwl_mvm_stat_iterator(void *_data, u8 *mac, | |
476 | struct ieee80211_vif *vif) | |
477 | { | |
478 | struct iwl_mvm_stat_data *data = _data; | |
a20fd398 | 479 | struct iwl_mvm *mvm = data->mvm; |
777c9b6b | 480 | int sig = -data->beacon_filter_average_energy; |
a20fd398 AO |
481 | int last_event; |
482 | int thold = vif->bss_conf.cqm_rssi_thold; | |
483 | int hyst = vif->bss_conf.cqm_rssi_hyst; | |
777c9b6b | 484 | u16 id = le32_to_cpu(data->mac_id); |
a20fd398 AO |
485 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); |
486 | ||
33cef925 JB |
487 | /* This doesn't need the MAC ID check since it's not taking the |
488 | * data copied into the "data" struct, but rather the data from | |
489 | * the notification directly. | |
490 | */ | |
491 | if (data->general) { | |
492 | mvmvif->beacon_stats.num_beacons = | |
493 | le32_to_cpu(data->general->beacon_counter[mvmvif->id]); | |
494 | mvmvif->beacon_stats.avg_signal = | |
495 | -data->general->beacon_average_energy[mvmvif->id]; | |
496 | } | |
497 | ||
a20fd398 AO |
498 | if (mvmvif->id != id) |
499 | return; | |
500 | ||
501 | if (vif->type != NL80211_IFTYPE_STATION) | |
502 | return; | |
503 | ||
8047cc0c AB |
504 | if (sig == 0) { |
505 | IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n"); | |
506 | return; | |
507 | } | |
508 | ||
a20fd398 AO |
509 | mvmvif->bf_data.ave_beacon_signal = sig; |
510 | ||
911222b5 AO |
511 | /* BT Coex */ |
512 | if (mvmvif->bf_data.bt_coex_min_thold != | |
513 | mvmvif->bf_data.bt_coex_max_thold) { | |
514 | last_event = mvmvif->bf_data.last_bt_coex_event; | |
515 | if (sig > mvmvif->bf_data.bt_coex_max_thold && | |
516 | (last_event <= mvmvif->bf_data.bt_coex_min_thold || | |
517 | last_event == 0)) { | |
518 | mvmvif->bf_data.last_bt_coex_event = sig; | |
519 | IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", | |
520 | sig); | |
521 | iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); | |
522 | } else if (sig < mvmvif->bf_data.bt_coex_min_thold && | |
523 | (last_event >= mvmvif->bf_data.bt_coex_max_thold || | |
524 | last_event == 0)) { | |
525 | mvmvif->bf_data.last_bt_coex_event = sig; | |
526 | IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", | |
527 | sig); | |
528 | iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); | |
529 | } | |
530 | } | |
531 | ||
a20fd398 AO |
532 | if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) |
533 | return; | |
534 | ||
535 | /* CQM Notification */ | |
536 | last_event = mvmvif->bf_data.last_cqm_event; | |
537 | if (thold && sig < thold && (last_event == 0 || | |
538 | sig < last_event - hyst)) { | |
539 | mvmvif->bf_data.last_cqm_event = sig; | |
540 | IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", | |
541 | sig); | |
542 | ieee80211_cqm_rssi_notify( | |
543 | vif, | |
544 | NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, | |
545 | GFP_KERNEL); | |
546 | } else if (sig > thold && | |
547 | (last_event == 0 || sig > last_event + hyst)) { | |
548 | mvmvif->bf_data.last_cqm_event = sig; | |
549 | IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", | |
550 | sig); | |
551 | ieee80211_cqm_rssi_notify( | |
552 | vif, | |
553 | NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, | |
554 | GFP_KERNEL); | |
555 | } | |
556 | } | |
557 | ||
5a756c20 EG |
558 | static inline void |
559 | iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) | |
560 | { | |
561 | struct iwl_fw_dbg_trigger_tlv *trig; | |
562 | struct iwl_fw_dbg_trigger_stats *trig_stats; | |
563 | u32 trig_offset, trig_thold; | |
564 | ||
565 | if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS)) | |
566 | return; | |
567 | ||
568 | trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS); | |
569 | trig_stats = (void *)trig->data; | |
570 | ||
571 | if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) | |
572 | return; | |
573 | ||
574 | trig_offset = le32_to_cpu(trig_stats->stop_offset); | |
575 | trig_thold = le32_to_cpu(trig_stats->stop_threshold); | |
576 | ||
577 | if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt))) | |
578 | return; | |
579 | ||
580 | if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold) | |
581 | return; | |
582 | ||
5d4f929e | 583 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL); |
5a756c20 EG |
584 | } |
585 | ||
91a8bcde JB |
586 | void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, |
587 | struct iwl_rx_packet *pkt) | |
9ee718aa | 588 | { |
38d5f66f | 589 | struct iwl_notif_statistics_v10 *stats = (void *)&pkt->data; |
a20fd398 | 590 | struct iwl_mvm_stat_data data = { |
a20fd398 AO |
591 | .mvm = mvm, |
592 | }; | |
777c9b6b JB |
593 | u32 temperature; |
594 | ||
38d5f66f EG |
595 | if (iwl_rx_packet_payload_len(pkt) != sizeof(*stats)) |
596 | goto invalid; | |
777c9b6b | 597 | |
38d5f66f EG |
598 | temperature = le32_to_cpu(stats->general.radio_temperature); |
599 | data.mac_id = stats->rx.general.mac_id; | |
600 | data.beacon_filter_average_energy = | |
601 | stats->general.beacon_filter_average_energy; | |
777c9b6b | 602 | |
38d5f66f | 603 | iwl_mvm_update_rx_statistics(mvm, &stats->rx); |
777c9b6b | 604 | |
38d5f66f EG |
605 | mvm->radio_stats.rx_time = le64_to_cpu(stats->general.rx_time); |
606 | mvm->radio_stats.tx_time = le64_to_cpu(stats->general.tx_time); | |
607 | mvm->radio_stats.on_time_rf = | |
608 | le64_to_cpu(stats->general.on_time_rf); | |
609 | mvm->radio_stats.on_time_scan = | |
610 | le64_to_cpu(stats->general.on_time_scan); | |
91a8bcde | 611 | |
38d5f66f | 612 | data.general = &stats->general; |
9ee718aa | 613 | |
5a756c20 EG |
614 | iwl_mvm_rx_stats_check_trigger(mvm, pkt); |
615 | ||
a20fd398 AO |
616 | ieee80211_iterate_active_interfaces(mvm->hw, |
617 | IEEE80211_IFACE_ITER_NORMAL, | |
618 | iwl_mvm_stat_iterator, | |
619 | &data); | |
91a8bcde | 620 | return; |
777c9b6b JB |
621 | invalid: |
622 | IWL_ERR(mvm, "received invalid statistics size (%d)!\n", | |
623 | iwl_rx_packet_payload_len(pkt)); | |
91a8bcde JB |
624 | } |
625 | ||
0416841d | 626 | void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
91a8bcde JB |
627 | { |
628 | iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); | |
9ee718aa | 629 | } |
3af512d6 SS |
630 | |
631 | void iwl_mvm_window_status_notif(struct iwl_mvm *mvm, | |
632 | struct iwl_rx_cmd_buffer *rxb) | |
633 | { | |
634 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
635 | struct iwl_ba_window_status_notif *notif = (void *)pkt->data; | |
636 | int i; | |
637 | u32 pkt_len = iwl_rx_packet_payload_len(pkt); | |
638 | ||
639 | if (WARN_ONCE(pkt_len != sizeof(*notif), | |
640 | "Received window status notification of wrong size (%u)\n", | |
641 | pkt_len)) | |
642 | return; | |
643 | ||
644 | rcu_read_lock(); | |
645 | for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) { | |
646 | struct ieee80211_sta *sta; | |
647 | u8 sta_id, tid; | |
648 | u64 bitmap; | |
649 | u32 ssn; | |
650 | u16 ratid; | |
651 | u16 received_mpdu; | |
652 | ||
653 | ratid = le16_to_cpu(notif->ra_tid[i]); | |
654 | /* check that this TID is valid */ | |
655 | if (!(ratid & BA_WINDOW_STATUS_VALID_MSK)) | |
656 | continue; | |
657 | ||
658 | received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]); | |
659 | if (received_mpdu == 0) | |
660 | continue; | |
661 | ||
662 | tid = ratid & BA_WINDOW_STATUS_TID_MSK; | |
663 | /* get the station */ | |
664 | sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK) | |
665 | >> BA_WINDOW_STATUS_STA_ID_POS; | |
666 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
667 | if (IS_ERR_OR_NULL(sta)) | |
668 | continue; | |
669 | bitmap = le64_to_cpu(notif->bitmap[i]); | |
670 | ssn = le32_to_cpu(notif->start_seq_num[i]); | |
671 | ||
672 | /* update mac80211 with the bitmap for the reordering buffer */ | |
673 | ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap, | |
674 | received_mpdu); | |
675 | } | |
676 | rcu_read_unlock(); | |
677 | } |