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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, | |
43ec72b7 | 100 | struct ieee80211_sta *sta, |
1be5d8cc | 101 | struct napi_struct *napi, |
d0963b5d | 102 | struct sk_buff *skb, |
8ca151b5 | 103 | struct ieee80211_hdr *hdr, u16 len, |
bdbc58ab | 104 | u8 crypt_len, |
d0963b5d | 105 | struct iwl_rx_cmd_buffer *rxb) |
8ca151b5 | 106 | { |
8ca151b5 JB |
107 | unsigned int hdrlen, fraglen; |
108 | ||
8ca151b5 | 109 | /* If frame is small enough to fit in skb->head, pull it completely. |
3771a890 JB |
110 | * If not, only pull ieee80211_hdr (including crypto if present, and |
111 | * an additional 8 bytes for SNAP/ethertype, see below) so that | |
112 | * splice() or TCP coalesce are more efficient. | |
113 | * | |
114 | * Since, in addition, ieee80211_data_to_8023() always pull in at | |
115 | * least 8 bytes (possibly more for mesh) we can do the same here | |
116 | * to save the cost of doing it later. That still doesn't pull in | |
117 | * the actual IP header since the typical case has a SNAP header. | |
118 | * If the latter changes (there are efforts in the standards group | |
119 | * to do so) we should revisit this and ieee80211_data_to_8023(). | |
8ca151b5 | 120 | */ |
3771a890 JB |
121 | hdrlen = (len <= skb_tailroom(skb)) ? len : |
122 | sizeof(*hdr) + crypt_len + 8; | |
8ca151b5 JB |
123 | |
124 | memcpy(skb_put(skb, hdrlen), hdr, hdrlen); | |
125 | fraglen = len - hdrlen; | |
126 | ||
127 | if (fraglen) { | |
128 | int offset = (void *)hdr + hdrlen - | |
129 | rxb_addr(rxb) + rxb_offset(rxb); | |
130 | ||
131 | skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, | |
132 | fraglen, rxb->truesize); | |
133 | } | |
134 | ||
43ec72b7 | 135 | ieee80211_rx_napi(mvm->hw, sta, skb, napi); |
8ca151b5 JB |
136 | } |
137 | ||
a2d7b870 AA |
138 | /* |
139 | * iwl_mvm_get_signal_strength - use new rx PHY INFO API | |
17dbe564 AA |
140 | * values are reported by the fw as positive values - need to negate |
141 | * to obtain their dBM. Account for missing antennas by replacing 0 | |
142 | * values by -256dBm: practically 0 power and a non-feasible 8 bit value. | |
a2d7b870 | 143 | */ |
226eb8cd JB |
144 | static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, |
145 | struct iwl_rx_phy_info *phy_info, | |
146 | struct ieee80211_rx_status *rx_status) | |
a2d7b870 AA |
147 | { |
148 | int energy_a, energy_b, energy_c, max_energy; | |
149 | u32 val; | |
150 | ||
151 | val = | |
152 | le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]); | |
17dbe564 AA |
153 | energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >> |
154 | IWL_RX_INFO_ENERGY_ANT_A_POS; | |
2cddddc5 | 155 | energy_a = energy_a ? -energy_a : S8_MIN; |
17dbe564 AA |
156 | energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >> |
157 | IWL_RX_INFO_ENERGY_ANT_B_POS; | |
2cddddc5 | 158 | energy_b = energy_b ? -energy_b : S8_MIN; |
17dbe564 AA |
159 | energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >> |
160 | IWL_RX_INFO_ENERGY_ANT_C_POS; | |
2cddddc5 | 161 | energy_c = energy_c ? -energy_c : S8_MIN; |
a2d7b870 AA |
162 | max_energy = max(energy_a, energy_b); |
163 | max_energy = max(max_energy, energy_c); | |
164 | ||
165 | IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n", | |
166 | energy_a, energy_b, energy_c, max_energy); | |
167 | ||
226eb8cd JB |
168 | rx_status->signal = max_energy; |
169 | rx_status->chains = (le16_to_cpu(phy_info->phy_flags) & | |
170 | RX_RES_PHY_FLAGS_ANTENNA) | |
171 | >> RX_RES_PHY_FLAGS_ANTENNA_POS; | |
172 | rx_status->chain_signal[0] = energy_a; | |
173 | rx_status->chain_signal[1] = energy_b; | |
174 | rx_status->chain_signal[2] = energy_c; | |
a2d7b870 AA |
175 | } |
176 | ||
8ca151b5 JB |
177 | /* |
178 | * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format | |
179 | * @mvm: the mvm object | |
180 | * @hdr: 80211 header | |
181 | * @stats: status in mac80211's format | |
182 | * @rx_pkt_status: status coming from fw | |
183 | * | |
184 | * returns non 0 value if the packet should be dropped | |
185 | */ | |
186 | static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm, | |
187 | struct ieee80211_hdr *hdr, | |
188 | struct ieee80211_rx_status *stats, | |
eb96ccb1 JB |
189 | u32 rx_pkt_status, |
190 | u8 *crypt_len) | |
8ca151b5 JB |
191 | { |
192 | if (!ieee80211_has_protected(hdr->frame_control) || | |
193 | (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == | |
194 | RX_MPDU_RES_STATUS_SEC_NO_ENC) | |
195 | return 0; | |
196 | ||
197 | /* packet was encrypted with unknown alg */ | |
198 | if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == | |
199 | RX_MPDU_RES_STATUS_SEC_ENC_ERR) | |
200 | return 0; | |
201 | ||
202 | switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) { | |
203 | case RX_MPDU_RES_STATUS_SEC_CCM_ENC: | |
204 | /* alg is CCM: check MIC only */ | |
205 | if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) | |
206 | return -1; | |
207 | ||
208 | stats->flag |= RX_FLAG_DECRYPTED; | |
eb96ccb1 | 209 | *crypt_len = IEEE80211_CCMP_HDR_LEN; |
8ca151b5 JB |
210 | return 0; |
211 | ||
212 | case RX_MPDU_RES_STATUS_SEC_TKIP_ENC: | |
213 | /* Don't drop the frame and decrypt it in SW */ | |
214 | if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK)) | |
215 | return 0; | |
eb96ccb1 | 216 | *crypt_len = IEEE80211_TKIP_IV_LEN; |
8ca151b5 JB |
217 | /* fall through if TTAK OK */ |
218 | ||
219 | case RX_MPDU_RES_STATUS_SEC_WEP_ENC: | |
220 | if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK)) | |
221 | return -1; | |
222 | ||
223 | stats->flag |= RX_FLAG_DECRYPTED; | |
eb96ccb1 JB |
224 | if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == |
225 | RX_MPDU_RES_STATUS_SEC_WEP_ENC) | |
226 | *crypt_len = IEEE80211_WEP_IV_LEN; | |
8ca151b5 JB |
227 | return 0; |
228 | ||
e36e5433 MS |
229 | case RX_MPDU_RES_STATUS_SEC_EXT_ENC: |
230 | if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) | |
231 | return -1; | |
232 | stats->flag |= RX_FLAG_DECRYPTED; | |
233 | return 0; | |
234 | ||
8ca151b5 JB |
235 | default: |
236 | IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); | |
237 | } | |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
93190fb0 AA |
242 | static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, |
243 | struct sk_buff *skb, | |
244 | u32 status) | |
245 | { | |
246 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
247 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); | |
248 | ||
249 | if (mvmvif->features & NETIF_F_RXCSUM && | |
250 | status & RX_MPDU_RES_STATUS_CSUM_DONE && | |
251 | status & RX_MPDU_RES_STATUS_CSUM_OK) | |
252 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
253 | } | |
254 | ||
8ca151b5 JB |
255 | /* |
256 | * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler | |
257 | * | |
258 | * Handles the actual data of the Rx packet from the fw | |
259 | */ | |
1be5d8cc JB |
260 | void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, |
261 | struct iwl_rx_cmd_buffer *rxb) | |
8ca151b5 JB |
262 | { |
263 | struct ieee80211_hdr *hdr; | |
d0963b5d | 264 | struct ieee80211_rx_status *rx_status; |
8ca151b5 JB |
265 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
266 | struct iwl_rx_phy_info *phy_info; | |
267 | struct iwl_rx_mpdu_res_start *rx_res; | |
a399f980 | 268 | struct ieee80211_sta *sta = NULL; |
d0963b5d | 269 | struct sk_buff *skb; |
8ca151b5 | 270 | u32 len; |
8ca151b5 JB |
271 | u32 rate_n_flags; |
272 | u32 rx_pkt_status; | |
eb96ccb1 | 273 | u8 crypt_len = 0; |
16e4dd8f | 274 | bool take_ref; |
8ca151b5 JB |
275 | |
276 | phy_info = &mvm->last_phy_info; | |
277 | rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; | |
278 | hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); | |
279 | len = le16_to_cpu(rx_res->byte_count); | |
280 | rx_pkt_status = le32_to_cpup((__le32 *) | |
281 | (pkt->data + sizeof(*rx_res) + len)); | |
282 | ||
d0963b5d JB |
283 | /* Dont use dev_alloc_skb(), we'll have enough headroom once |
284 | * ieee80211_hdr pulled. | |
285 | */ | |
286 | skb = alloc_skb(128, GFP_ATOMIC); | |
287 | if (!skb) { | |
288 | IWL_ERR(mvm, "alloc_skb failed\n"); | |
0416841d | 289 | return; |
d0963b5d JB |
290 | } |
291 | ||
292 | rx_status = IEEE80211_SKB_RXCB(skb); | |
8ca151b5 JB |
293 | |
294 | /* | |
295 | * drop the packet if it has failed being decrypted by HW | |
296 | */ | |
eb96ccb1 JB |
297 | if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status, |
298 | &crypt_len)) { | |
8ca151b5 JB |
299 | IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", |
300 | rx_pkt_status); | |
d0963b5d | 301 | kfree_skb(skb); |
0416841d | 302 | return; |
8ca151b5 JB |
303 | } |
304 | ||
fb8b8ee1 JB |
305 | /* |
306 | * Keep packets with CRC errors (and with overrun) for monitor mode | |
307 | * (otherwise the firmware discards them) but mark them as bad. | |
308 | */ | |
8ca151b5 JB |
309 | if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || |
310 | !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { | |
311 | IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); | |
d0963b5d | 312 | rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; |
8ca151b5 JB |
313 | } |
314 | ||
315 | /* This will be used in several places later */ | |
316 | rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); | |
317 | ||
318 | /* rx_status carries information about the packet to mac80211 */ | |
d0963b5d JB |
319 | rx_status->mactime = le64_to_cpu(phy_info->timestamp); |
320 | rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp); | |
321 | rx_status->band = | |
8ca151b5 | 322 | (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? |
57fbcce3 | 323 | NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; |
d0963b5d | 324 | rx_status->freq = |
8ca151b5 | 325 | ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), |
d0963b5d | 326 | rx_status->band); |
77fe7395 SS |
327 | |
328 | /* TSF as indicated by the firmware is at INA time */ | |
329 | rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; | |
8ca151b5 | 330 | |
d0963b5d | 331 | iwl_mvm_get_signal_strength(mvm, phy_info, rx_status); |
8ca151b5 | 332 | |
d0963b5d JB |
333 | IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal, |
334 | (unsigned long long)rx_status->mactime); | |
8ca151b5 | 335 | |
361dbec8 | 336 | rcu_read_lock(); |
a399f980 JB |
337 | if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) { |
338 | u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK; | |
339 | ||
340 | id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT; | |
341 | ||
342 | if (!WARN_ON_ONCE(id >= IWL_MVM_STATION_COUNT)) { | |
343 | sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); | |
344 | if (IS_ERR(sta)) | |
345 | sta = NULL; | |
346 | } | |
347 | } else if (!is_multicast_ether_addr(hdr->addr2)) { | |
348 | /* This is fine since we prevent two stations with the same | |
349 | * address from being added. | |
350 | */ | |
351 | sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); | |
361dbec8 ES |
352 | } |
353 | ||
361dbec8 | 354 | if (sta) { |
7c0ebd78 | 355 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
d3a108a4 AO |
356 | struct ieee80211_vif *tx_blocked_vif = |
357 | rcu_dereference(mvm->csa_tx_blocked_vif); | |
7c0ebd78 | 358 | |
a399f980 JB |
359 | /* We have tx blocked stations (with CS bit). If we heard |
360 | * frames from a blocked station on a new channel we can | |
361 | * TX to it again. | |
362 | */ | |
d3a108a4 AO |
363 | if (unlikely(tx_blocked_vif) && |
364 | mvmsta->vif == tx_blocked_vif) { | |
365 | struct iwl_mvm_vif *mvmvif = | |
366 | iwl_mvm_vif_from_mac80211(tx_blocked_vif); | |
367 | ||
368 | if (mvmvif->csa_target_freq == rx_status->freq) | |
369 | iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, | |
370 | false); | |
371 | } | |
a399f980 | 372 | |
d0963b5d | 373 | rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status); |
3ec50b5e EG |
374 | |
375 | if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) && | |
376 | ieee80211_is_beacon(hdr->frame_control)) { | |
377 | struct iwl_fw_dbg_trigger_tlv *trig; | |
378 | struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; | |
379 | bool trig_check; | |
380 | s32 rssi; | |
381 | ||
382 | trig = iwl_fw_dbg_get_trigger(mvm->fw, | |
383 | FW_DBG_TRIGGER_RSSI); | |
384 | rssi_trig = (void *)trig->data; | |
385 | rssi = le32_to_cpu(rssi_trig->rssi); | |
386 | ||
387 | trig_check = | |
388 | iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif, | |
389 | trig); | |
390 | if (trig_check && rx_status->signal < rssi) | |
5d4f929e | 391 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL); |
3ec50b5e | 392 | } |
93190fb0 | 393 | |
a399f980 JB |
394 | if (ieee80211_is_data(hdr->frame_control)) |
395 | iwl_mvm_rx_csum(sta, skb, rx_pkt_status); | |
396 | } | |
361dbec8 ES |
397 | rcu_read_unlock(); |
398 | ||
8ca151b5 JB |
399 | /* set the preamble flag if appropriate */ |
400 | if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) | |
d0963b5d | 401 | rx_status->flag |= RX_FLAG_SHORTPRE; |
8ca151b5 JB |
402 | |
403 | if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { | |
404 | /* | |
405 | * We know which subframes of an A-MPDU belong | |
406 | * together since we get a single PHY response | |
407 | * from the firmware for all of them | |
408 | */ | |
d0963b5d JB |
409 | rx_status->flag |= RX_FLAG_AMPDU_DETAILS; |
410 | rx_status->ampdu_reference = mvm->ampdu_ref; | |
8ca151b5 JB |
411 | } |
412 | ||
413 | /* Set up the HT phy flags */ | |
414 | switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { | |
415 | case RATE_MCS_CHAN_WIDTH_20: | |
416 | break; | |
417 | case RATE_MCS_CHAN_WIDTH_40: | |
d0963b5d | 418 | rx_status->flag |= RX_FLAG_40MHZ; |
8ca151b5 JB |
419 | break; |
420 | case RATE_MCS_CHAN_WIDTH_80: | |
d0963b5d | 421 | rx_status->vht_flag |= RX_VHT_FLAG_80MHZ; |
8ca151b5 JB |
422 | break; |
423 | case RATE_MCS_CHAN_WIDTH_160: | |
d0963b5d | 424 | rx_status->vht_flag |= RX_VHT_FLAG_160MHZ; |
8ca151b5 JB |
425 | break; |
426 | } | |
427 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
d0963b5d | 428 | rx_status->flag |= RX_FLAG_SHORT_GI; |
8ca151b5 | 429 | if (rate_n_flags & RATE_HT_MCS_GF_MSK) |
d0963b5d | 430 | rx_status->flag |= RX_FLAG_HT_GF; |
7b1dd048 | 431 | if (rate_n_flags & RATE_MCS_LDPC_MSK) |
d0963b5d | 432 | rx_status->flag |= RX_FLAG_LDPC; |
8ca151b5 | 433 | if (rate_n_flags & RATE_MCS_HT_MSK) { |
7b1dd048 EG |
434 | u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >> |
435 | RATE_MCS_STBC_POS; | |
d0963b5d JB |
436 | rx_status->flag |= RX_FLAG_HT; |
437 | rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; | |
438 | rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT; | |
8ca151b5 | 439 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { |
7b1dd048 EG |
440 | u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >> |
441 | RATE_MCS_STBC_POS; | |
d0963b5d | 442 | rx_status->vht_nss = |
8ca151b5 JB |
443 | ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> |
444 | RATE_VHT_MCS_NSS_POS) + 1; | |
d0963b5d JB |
445 | rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; |
446 | rx_status->flag |= RX_FLAG_VHT; | |
447 | rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT; | |
95e05ab7 | 448 | if (rate_n_flags & RATE_MCS_BF_MSK) |
d0963b5d | 449 | rx_status->vht_flag |= RX_VHT_FLAG_BF; |
8ca151b5 | 450 | } else { |
d0963b5d | 451 | rx_status->rate_idx = |
8ca151b5 | 452 | iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, |
d0963b5d | 453 | rx_status->band); |
8ca151b5 JB |
454 | } |
455 | ||
5fc0f76c | 456 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
2f15a829 | 457 | iwl_mvm_update_frame_stats(mvm, rate_n_flags, |
d0963b5d | 458 | rx_status->flag & RX_FLAG_AMPDU_DETAILS); |
5fc0f76c | 459 | #endif |
a339e918 LC |
460 | |
461 | if (unlikely((ieee80211_is_beacon(hdr->frame_control) || | |
462 | ieee80211_is_probe_resp(hdr->frame_control)) && | |
463 | mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)) | |
464 | mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; | |
465 | ||
43ec72b7 JB |
466 | if (unlikely(ieee80211_is_beacon(hdr->frame_control) || |
467 | ieee80211_is_probe_resp(hdr->frame_control))) | |
468 | rx_status->boottime_ns = ktime_get_boot_ns(); | |
469 | ||
16e4dd8f LC |
470 | /* Take a reference briefly to kick off a d0i3 entry delay so |
471 | * we can handle bursts of RX packets without toggling the | |
472 | * state too often. But don't do this for beacons if we are | |
473 | * going to idle because the beacon filtering changes we make | |
474 | * cause the firmware to send us collateral beacons. */ | |
475 | take_ref = !(test_bit(STATUS_TRANS_GOING_IDLE, &mvm->trans->status) && | |
476 | ieee80211_is_beacon(hdr->frame_control)); | |
477 | ||
478 | if (take_ref) | |
479 | iwl_mvm_ref(mvm, IWL_MVM_REF_RX); | |
480 | ||
43ec72b7 | 481 | iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len, |
bdbc58ab | 482 | crypt_len, rxb); |
16e4dd8f LC |
483 | |
484 | if (take_ref) | |
485 | iwl_mvm_unref(mvm, IWL_MVM_REF_RX); | |
8ca151b5 | 486 | } |
9ee718aa | 487 | |
3848ab66 | 488 | static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm, |
777c9b6b | 489 | struct mvm_statistics_rx *rx_stats) |
3848ab66 | 490 | { |
3848ab66 | 491 | lockdep_assert_held(&mvm->mutex); |
777c9b6b JB |
492 | |
493 | mvm->rx_stats = *rx_stats; | |
3848ab66 MG |
494 | } |
495 | ||
a20fd398 | 496 | struct iwl_mvm_stat_data { |
a20fd398 | 497 | struct iwl_mvm *mvm; |
777c9b6b | 498 | __le32 mac_id; |
62e004fe | 499 | u8 beacon_filter_average_energy; |
33cef925 | 500 | struct mvm_statistics_general_v8 *general; |
988b5968 | 501 | struct mvm_statistics_load *load; |
a20fd398 AO |
502 | }; |
503 | ||
504 | static void iwl_mvm_stat_iterator(void *_data, u8 *mac, | |
505 | struct ieee80211_vif *vif) | |
506 | { | |
507 | struct iwl_mvm_stat_data *data = _data; | |
a20fd398 | 508 | struct iwl_mvm *mvm = data->mvm; |
777c9b6b | 509 | int sig = -data->beacon_filter_average_energy; |
a20fd398 AO |
510 | int last_event; |
511 | int thold = vif->bss_conf.cqm_rssi_thold; | |
512 | int hyst = vif->bss_conf.cqm_rssi_hyst; | |
777c9b6b | 513 | u16 id = le32_to_cpu(data->mac_id); |
a20fd398 AO |
514 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); |
515 | ||
33cef925 JB |
516 | /* This doesn't need the MAC ID check since it's not taking the |
517 | * data copied into the "data" struct, but rather the data from | |
518 | * the notification directly. | |
519 | */ | |
520 | if (data->general) { | |
521 | mvmvif->beacon_stats.num_beacons = | |
522 | le32_to_cpu(data->general->beacon_counter[mvmvif->id]); | |
523 | mvmvif->beacon_stats.avg_signal = | |
524 | -data->general->beacon_average_energy[mvmvif->id]; | |
525 | } | |
526 | ||
a20fd398 AO |
527 | if (mvmvif->id != id) |
528 | return; | |
529 | ||
530 | if (vif->type != NL80211_IFTYPE_STATION) | |
531 | return; | |
532 | ||
8047cc0c AB |
533 | if (sig == 0) { |
534 | IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n"); | |
535 | return; | |
536 | } | |
537 | ||
a20fd398 AO |
538 | mvmvif->bf_data.ave_beacon_signal = sig; |
539 | ||
911222b5 AO |
540 | /* BT Coex */ |
541 | if (mvmvif->bf_data.bt_coex_min_thold != | |
542 | mvmvif->bf_data.bt_coex_max_thold) { | |
543 | last_event = mvmvif->bf_data.last_bt_coex_event; | |
544 | if (sig > mvmvif->bf_data.bt_coex_max_thold && | |
545 | (last_event <= mvmvif->bf_data.bt_coex_min_thold || | |
546 | last_event == 0)) { | |
547 | mvmvif->bf_data.last_bt_coex_event = sig; | |
548 | IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", | |
549 | sig); | |
550 | iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); | |
551 | } else if (sig < mvmvif->bf_data.bt_coex_min_thold && | |
552 | (last_event >= mvmvif->bf_data.bt_coex_max_thold || | |
553 | last_event == 0)) { | |
554 | mvmvif->bf_data.last_bt_coex_event = sig; | |
555 | IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", | |
556 | sig); | |
557 | iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); | |
558 | } | |
559 | } | |
560 | ||
a20fd398 AO |
561 | if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) |
562 | return; | |
563 | ||
564 | /* CQM Notification */ | |
565 | last_event = mvmvif->bf_data.last_cqm_event; | |
566 | if (thold && sig < thold && (last_event == 0 || | |
567 | sig < last_event - hyst)) { | |
568 | mvmvif->bf_data.last_cqm_event = sig; | |
569 | IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", | |
570 | sig); | |
571 | ieee80211_cqm_rssi_notify( | |
572 | vif, | |
573 | NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, | |
574 | GFP_KERNEL); | |
575 | } else if (sig > thold && | |
576 | (last_event == 0 || sig > last_event + hyst)) { | |
577 | mvmvif->bf_data.last_cqm_event = sig; | |
578 | IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", | |
579 | sig); | |
580 | ieee80211_cqm_rssi_notify( | |
581 | vif, | |
582 | NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, | |
583 | GFP_KERNEL); | |
584 | } | |
585 | } | |
586 | ||
5a756c20 EG |
587 | static inline void |
588 | iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) | |
589 | { | |
590 | struct iwl_fw_dbg_trigger_tlv *trig; | |
591 | struct iwl_fw_dbg_trigger_stats *trig_stats; | |
592 | u32 trig_offset, trig_thold; | |
593 | ||
594 | if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS)) | |
595 | return; | |
596 | ||
597 | trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS); | |
598 | trig_stats = (void *)trig->data; | |
599 | ||
600 | if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) | |
601 | return; | |
602 | ||
603 | trig_offset = le32_to_cpu(trig_stats->stop_offset); | |
604 | trig_thold = le32_to_cpu(trig_stats->stop_threshold); | |
605 | ||
606 | if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt))) | |
607 | return; | |
608 | ||
609 | if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold) | |
610 | return; | |
611 | ||
5d4f929e | 612 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL); |
5a756c20 EG |
613 | } |
614 | ||
91a8bcde JB |
615 | void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, |
616 | struct iwl_rx_packet *pkt) | |
9ee718aa | 617 | { |
988b5968 | 618 | struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data; |
a20fd398 | 619 | struct iwl_mvm_stat_data data = { |
a20fd398 AO |
620 | .mvm = mvm, |
621 | }; | |
988b5968 SS |
622 | int expected_size = iwl_mvm_has_new_rx_api(mvm) ? sizeof(*stats) : |
623 | sizeof(struct iwl_notif_statistics_v10); | |
777c9b6b JB |
624 | u32 temperature; |
625 | ||
988b5968 | 626 | if (iwl_rx_packet_payload_len(pkt) != expected_size) |
38d5f66f | 627 | goto invalid; |
777c9b6b | 628 | |
38d5f66f EG |
629 | temperature = le32_to_cpu(stats->general.radio_temperature); |
630 | data.mac_id = stats->rx.general.mac_id; | |
631 | data.beacon_filter_average_energy = | |
632 | stats->general.beacon_filter_average_energy; | |
777c9b6b | 633 | |
38d5f66f | 634 | iwl_mvm_update_rx_statistics(mvm, &stats->rx); |
777c9b6b | 635 | |
38d5f66f EG |
636 | mvm->radio_stats.rx_time = le64_to_cpu(stats->general.rx_time); |
637 | mvm->radio_stats.tx_time = le64_to_cpu(stats->general.tx_time); | |
638 | mvm->radio_stats.on_time_rf = | |
639 | le64_to_cpu(stats->general.on_time_rf); | |
640 | mvm->radio_stats.on_time_scan = | |
641 | le64_to_cpu(stats->general.on_time_scan); | |
91a8bcde | 642 | |
38d5f66f | 643 | data.general = &stats->general; |
988b5968 SS |
644 | if (iwl_mvm_has_new_rx_api(mvm)) { |
645 | int i; | |
646 | ||
647 | data.load = &stats->load_stats; | |
648 | ||
649 | rcu_read_lock(); | |
650 | for (i = 0; i < IWL_MVM_STATION_COUNT; i++) { | |
651 | struct iwl_mvm_sta *sta; | |
652 | ||
653 | if (!data.load->avg_energy[i]) | |
654 | continue; | |
655 | ||
656 | sta = iwl_mvm_sta_from_staid_rcu(mvm, i); | |
657 | if (!sta) | |
658 | continue; | |
659 | sta->avg_energy = data.load->avg_energy[i]; | |
660 | } | |
661 | rcu_read_unlock(); | |
662 | } | |
9ee718aa | 663 | |
5a756c20 EG |
664 | iwl_mvm_rx_stats_check_trigger(mvm, pkt); |
665 | ||
a20fd398 AO |
666 | ieee80211_iterate_active_interfaces(mvm->hw, |
667 | IEEE80211_IFACE_ITER_NORMAL, | |
668 | iwl_mvm_stat_iterator, | |
669 | &data); | |
91a8bcde | 670 | return; |
777c9b6b JB |
671 | invalid: |
672 | IWL_ERR(mvm, "received invalid statistics size (%d)!\n", | |
673 | iwl_rx_packet_payload_len(pkt)); | |
91a8bcde JB |
674 | } |
675 | ||
0416841d | 676 | void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
91a8bcde JB |
677 | { |
678 | iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); | |
9ee718aa | 679 | } |
3af512d6 SS |
680 | |
681 | void iwl_mvm_window_status_notif(struct iwl_mvm *mvm, | |
682 | struct iwl_rx_cmd_buffer *rxb) | |
683 | { | |
684 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
685 | struct iwl_ba_window_status_notif *notif = (void *)pkt->data; | |
686 | int i; | |
687 | u32 pkt_len = iwl_rx_packet_payload_len(pkt); | |
688 | ||
689 | if (WARN_ONCE(pkt_len != sizeof(*notif), | |
690 | "Received window status notification of wrong size (%u)\n", | |
691 | pkt_len)) | |
692 | return; | |
693 | ||
694 | rcu_read_lock(); | |
695 | for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) { | |
696 | struct ieee80211_sta *sta; | |
697 | u8 sta_id, tid; | |
698 | u64 bitmap; | |
699 | u32 ssn; | |
700 | u16 ratid; | |
701 | u16 received_mpdu; | |
702 | ||
703 | ratid = le16_to_cpu(notif->ra_tid[i]); | |
704 | /* check that this TID is valid */ | |
705 | if (!(ratid & BA_WINDOW_STATUS_VALID_MSK)) | |
706 | continue; | |
707 | ||
708 | received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]); | |
709 | if (received_mpdu == 0) | |
710 | continue; | |
711 | ||
712 | tid = ratid & BA_WINDOW_STATUS_TID_MSK; | |
713 | /* get the station */ | |
714 | sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK) | |
715 | >> BA_WINDOW_STATUS_STA_ID_POS; | |
716 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
717 | if (IS_ERR_OR_NULL(sta)) | |
718 | continue; | |
719 | bitmap = le64_to_cpu(notif->bitmap[i]); | |
720 | ssn = le32_to_cpu(notif->start_seq_num[i]); | |
721 | ||
722 | /* update mac80211 with the bitmap for the reordering buffer */ | |
723 | ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap, | |
724 | received_mpdu); | |
725 | } | |
726 | rcu_read_unlock(); | |
727 | } |