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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 |
cfbeb598 | 10 | * Copyright(c) 2016 - 2017 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 | { |
5cddd05c JB |
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); | |
8ca151b5 | 121 | |
8ca151b5 | 122 | /* If frame is small enough to fit in skb->head, pull it completely. |
3771a890 JB |
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(). | |
8ca151b5 | 133 | */ |
5cddd05c | 134 | hdrlen = (len <= skb_tailroom(skb)) ? len : hdrlen + crypt_len + 8; |
8ca151b5 JB |
135 | |
136 | memcpy(skb_put(skb, hdrlen), 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 | ||
43ec72b7 | 147 | ieee80211_rx_napi(mvm->hw, sta, skb, napi); |
8ca151b5 JB |
148 | } |
149 | ||
a2d7b870 AA |
150 | /* |
151 | * iwl_mvm_get_signal_strength - use new rx PHY INFO API | |
17dbe564 AA |
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. | |
a2d7b870 | 155 | */ |
226eb8cd JB |
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) | |
a2d7b870 AA |
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]); | |
17dbe564 AA |
165 | energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >> |
166 | IWL_RX_INFO_ENERGY_ANT_A_POS; | |
2cddddc5 | 167 | energy_a = energy_a ? -energy_a : S8_MIN; |
17dbe564 AA |
168 | energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >> |
169 | IWL_RX_INFO_ENERGY_ANT_B_POS; | |
2cddddc5 | 170 | energy_b = energy_b ? -energy_b : S8_MIN; |
17dbe564 AA |
171 | energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >> |
172 | IWL_RX_INFO_ENERGY_ANT_C_POS; | |
2cddddc5 | 173 | energy_c = energy_c ? -energy_c : S8_MIN; |
a2d7b870 AA |
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 | ||
226eb8cd JB |
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; | |
a2d7b870 AA |
187 | } |
188 | ||
8ca151b5 JB |
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 | */ | |
198 | static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm, | |
199 | struct ieee80211_hdr *hdr, | |
200 | struct ieee80211_rx_status *stats, | |
eb96ccb1 JB |
201 | u32 rx_pkt_status, |
202 | u8 *crypt_len) | |
8ca151b5 JB |
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; | |
eb96ccb1 | 221 | *crypt_len = IEEE80211_CCMP_HDR_LEN; |
8ca151b5 JB |
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; | |
eb96ccb1 | 228 | *crypt_len = IEEE80211_TKIP_IV_LEN; |
8ca151b5 JB |
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; | |
eb96ccb1 JB |
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; | |
8ca151b5 JB |
239 | return 0; |
240 | ||
e36e5433 MS |
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 | ||
8ca151b5 JB |
247 | default: |
248 | IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); | |
249 | } | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
93190fb0 AA |
254 | static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, |
255 | struct sk_buff *skb, | |
256 | u32 status) | |
257 | { | |
258 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
259 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); | |
260 | ||
261 | if (mvmvif->features & NETIF_F_RXCSUM && | |
262 | status & RX_MPDU_RES_STATUS_CSUM_DONE && | |
263 | status & RX_MPDU_RES_STATUS_CSUM_OK) | |
264 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
265 | } | |
266 | ||
8ca151b5 JB |
267 | /* |
268 | * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler | |
269 | * | |
270 | * Handles the actual data of the Rx packet from the fw | |
271 | */ | |
1be5d8cc JB |
272 | void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, |
273 | struct iwl_rx_cmd_buffer *rxb) | |
8ca151b5 JB |
274 | { |
275 | struct ieee80211_hdr *hdr; | |
d0963b5d | 276 | struct ieee80211_rx_status *rx_status; |
8ca151b5 JB |
277 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
278 | struct iwl_rx_phy_info *phy_info; | |
279 | struct iwl_rx_mpdu_res_start *rx_res; | |
a399f980 | 280 | struct ieee80211_sta *sta = NULL; |
d0963b5d | 281 | struct sk_buff *skb; |
8ca151b5 | 282 | u32 len; |
8ca151b5 JB |
283 | u32 rate_n_flags; |
284 | u32 rx_pkt_status; | |
eb96ccb1 | 285 | u8 crypt_len = 0; |
16e4dd8f | 286 | bool take_ref; |
8ca151b5 JB |
287 | |
288 | phy_info = &mvm->last_phy_info; | |
289 | rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; | |
290 | hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); | |
291 | len = le16_to_cpu(rx_res->byte_count); | |
292 | rx_pkt_status = le32_to_cpup((__le32 *) | |
293 | (pkt->data + sizeof(*rx_res) + len)); | |
294 | ||
d0963b5d JB |
295 | /* Dont use dev_alloc_skb(), we'll have enough headroom once |
296 | * ieee80211_hdr pulled. | |
297 | */ | |
298 | skb = alloc_skb(128, GFP_ATOMIC); | |
299 | if (!skb) { | |
300 | IWL_ERR(mvm, "alloc_skb failed\n"); | |
0416841d | 301 | return; |
d0963b5d JB |
302 | } |
303 | ||
304 | rx_status = IEEE80211_SKB_RXCB(skb); | |
8ca151b5 JB |
305 | |
306 | /* | |
307 | * drop the packet if it has failed being decrypted by HW | |
308 | */ | |
eb96ccb1 JB |
309 | if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status, |
310 | &crypt_len)) { | |
8ca151b5 JB |
311 | IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", |
312 | rx_pkt_status); | |
d0963b5d | 313 | kfree_skb(skb); |
0416841d | 314 | return; |
8ca151b5 JB |
315 | } |
316 | ||
fb8b8ee1 JB |
317 | /* |
318 | * Keep packets with CRC errors (and with overrun) for monitor mode | |
319 | * (otherwise the firmware discards them) but mark them as bad. | |
320 | */ | |
8ca151b5 JB |
321 | if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || |
322 | !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { | |
323 | IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); | |
d0963b5d | 324 | rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; |
8ca151b5 JB |
325 | } |
326 | ||
327 | /* This will be used in several places later */ | |
328 | rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); | |
329 | ||
330 | /* rx_status carries information about the packet to mac80211 */ | |
d0963b5d JB |
331 | rx_status->mactime = le64_to_cpu(phy_info->timestamp); |
332 | rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp); | |
333 | rx_status->band = | |
8ca151b5 | 334 | (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? |
57fbcce3 | 335 | NL80211_BAND_2GHZ : NL80211_BAND_5GHZ; |
d0963b5d | 336 | rx_status->freq = |
8ca151b5 | 337 | ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), |
d0963b5d | 338 | rx_status->band); |
77fe7395 SS |
339 | |
340 | /* TSF as indicated by the firmware is at INA time */ | |
341 | rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; | |
8ca151b5 | 342 | |
d0963b5d | 343 | iwl_mvm_get_signal_strength(mvm, phy_info, rx_status); |
8ca151b5 | 344 | |
d0963b5d JB |
345 | IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal, |
346 | (unsigned long long)rx_status->mactime); | |
8ca151b5 | 347 | |
361dbec8 | 348 | rcu_read_lock(); |
a399f980 JB |
349 | if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) { |
350 | u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK; | |
351 | ||
352 | id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT; | |
353 | ||
0ae98812 | 354 | if (!WARN_ON_ONCE(id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) { |
a399f980 JB |
355 | sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); |
356 | if (IS_ERR(sta)) | |
357 | sta = NULL; | |
358 | } | |
359 | } else if (!is_multicast_ether_addr(hdr->addr2)) { | |
360 | /* This is fine since we prevent two stations with the same | |
361 | * address from being added. | |
362 | */ | |
363 | sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); | |
361dbec8 ES |
364 | } |
365 | ||
361dbec8 | 366 | if (sta) { |
7c0ebd78 | 367 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
d3a108a4 AO |
368 | struct ieee80211_vif *tx_blocked_vif = |
369 | rcu_dereference(mvm->csa_tx_blocked_vif); | |
7c0ebd78 | 370 | |
a399f980 JB |
371 | /* We have tx blocked stations (with CS bit). If we heard |
372 | * frames from a blocked station on a new channel we can | |
373 | * TX to it again. | |
374 | */ | |
d3a108a4 AO |
375 | if (unlikely(tx_blocked_vif) && |
376 | mvmsta->vif == tx_blocked_vif) { | |
377 | struct iwl_mvm_vif *mvmvif = | |
378 | iwl_mvm_vif_from_mac80211(tx_blocked_vif); | |
379 | ||
380 | if (mvmvif->csa_target_freq == rx_status->freq) | |
381 | iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, | |
382 | false); | |
383 | } | |
a399f980 | 384 | |
d0963b5d | 385 | rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status); |
3ec50b5e EG |
386 | |
387 | if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) && | |
388 | ieee80211_is_beacon(hdr->frame_control)) { | |
389 | struct iwl_fw_dbg_trigger_tlv *trig; | |
390 | struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; | |
391 | bool trig_check; | |
392 | s32 rssi; | |
393 | ||
394 | trig = iwl_fw_dbg_get_trigger(mvm->fw, | |
395 | FW_DBG_TRIGGER_RSSI); | |
396 | rssi_trig = (void *)trig->data; | |
397 | rssi = le32_to_cpu(rssi_trig->rssi); | |
398 | ||
399 | trig_check = | |
400 | iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif, | |
401 | trig); | |
402 | if (trig_check && rx_status->signal < rssi) | |
5d4f929e | 403 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL); |
3ec50b5e | 404 | } |
93190fb0 | 405 | |
a399f980 JB |
406 | if (ieee80211_is_data(hdr->frame_control)) |
407 | iwl_mvm_rx_csum(sta, skb, rx_pkt_status); | |
408 | } | |
361dbec8 ES |
409 | rcu_read_unlock(); |
410 | ||
8ca151b5 JB |
411 | /* set the preamble flag if appropriate */ |
412 | if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) | |
7fdd69c5 | 413 | rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE; |
8ca151b5 JB |
414 | |
415 | if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { | |
416 | /* | |
417 | * We know which subframes of an A-MPDU belong | |
418 | * together since we get a single PHY response | |
419 | * from the firmware for all of them | |
420 | */ | |
d0963b5d JB |
421 | rx_status->flag |= RX_FLAG_AMPDU_DETAILS; |
422 | rx_status->ampdu_reference = mvm->ampdu_ref; | |
8ca151b5 JB |
423 | } |
424 | ||
425 | /* Set up the HT phy flags */ | |
426 | switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { | |
427 | case RATE_MCS_CHAN_WIDTH_20: | |
428 | break; | |
429 | case RATE_MCS_CHAN_WIDTH_40: | |
da6a4352 | 430 | rx_status->bw = RATE_INFO_BW_40; |
8ca151b5 JB |
431 | break; |
432 | case RATE_MCS_CHAN_WIDTH_80: | |
da6a4352 | 433 | rx_status->bw = RATE_INFO_BW_80; |
8ca151b5 JB |
434 | break; |
435 | case RATE_MCS_CHAN_WIDTH_160: | |
da6a4352 | 436 | rx_status->bw = RATE_INFO_BW_160; |
8ca151b5 JB |
437 | break; |
438 | } | |
439 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
7fdd69c5 | 440 | rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI; |
8ca151b5 | 441 | if (rate_n_flags & RATE_HT_MCS_GF_MSK) |
7fdd69c5 | 442 | rx_status->enc_flags |= RX_ENC_FLAG_HT_GF; |
7b1dd048 | 443 | if (rate_n_flags & RATE_MCS_LDPC_MSK) |
7fdd69c5 | 444 | rx_status->enc_flags |= RX_ENC_FLAG_LDPC; |
8ca151b5 | 445 | if (rate_n_flags & RATE_MCS_HT_MSK) { |
7b1dd048 EG |
446 | u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >> |
447 | RATE_MCS_STBC_POS; | |
da6a4352 | 448 | rx_status->encoding = RX_ENC_HT; |
d0963b5d | 449 | rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; |
7fdd69c5 | 450 | rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; |
8ca151b5 | 451 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { |
7b1dd048 EG |
452 | u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >> |
453 | RATE_MCS_STBC_POS; | |
d0963b5d | 454 | rx_status->vht_nss = |
8ca151b5 JB |
455 | ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> |
456 | RATE_VHT_MCS_NSS_POS) + 1; | |
d0963b5d | 457 | rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; |
da6a4352 | 458 | rx_status->encoding = RX_ENC_VHT; |
7fdd69c5 | 459 | rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT; |
95e05ab7 | 460 | if (rate_n_flags & RATE_MCS_BF_MSK) |
7fdd69c5 | 461 | rx_status->enc_flags |= RX_ENC_FLAG_BF; |
8ca151b5 | 462 | } else { |
cb2de6bb SS |
463 | int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, |
464 | rx_status->band); | |
465 | ||
466 | if (WARN(rate < 0 || rate > 0xFF, | |
467 | "Invalid rate flags 0x%x, band %d,\n", | |
468 | rate_n_flags, rx_status->band)) { | |
469 | kfree_skb(skb); | |
470 | return; | |
471 | } | |
472 | rx_status->rate_idx = rate; | |
8ca151b5 JB |
473 | } |
474 | ||
5fc0f76c | 475 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
2f15a829 | 476 | iwl_mvm_update_frame_stats(mvm, rate_n_flags, |
d0963b5d | 477 | rx_status->flag & RX_FLAG_AMPDU_DETAILS); |
5fc0f76c | 478 | #endif |
a339e918 LC |
479 | |
480 | if (unlikely((ieee80211_is_beacon(hdr->frame_control) || | |
481 | ieee80211_is_probe_resp(hdr->frame_control)) && | |
482 | mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)) | |
483 | mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND; | |
484 | ||
43ec72b7 JB |
485 | if (unlikely(ieee80211_is_beacon(hdr->frame_control) || |
486 | ieee80211_is_probe_resp(hdr->frame_control))) | |
487 | rx_status->boottime_ns = ktime_get_boot_ns(); | |
488 | ||
16e4dd8f LC |
489 | /* Take a reference briefly to kick off a d0i3 entry delay so |
490 | * we can handle bursts of RX packets without toggling the | |
491 | * state too often. But don't do this for beacons if we are | |
492 | * going to idle because the beacon filtering changes we make | |
493 | * cause the firmware to send us collateral beacons. */ | |
494 | take_ref = !(test_bit(STATUS_TRANS_GOING_IDLE, &mvm->trans->status) && | |
495 | ieee80211_is_beacon(hdr->frame_control)); | |
496 | ||
497 | if (take_ref) | |
498 | iwl_mvm_ref(mvm, IWL_MVM_REF_RX); | |
499 | ||
43ec72b7 | 500 | iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len, |
bdbc58ab | 501 | crypt_len, rxb); |
16e4dd8f LC |
502 | |
503 | if (take_ref) | |
504 | iwl_mvm_unref(mvm, IWL_MVM_REF_RX); | |
8ca151b5 | 505 | } |
9ee718aa | 506 | |
3848ab66 | 507 | static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm, |
777c9b6b | 508 | struct mvm_statistics_rx *rx_stats) |
3848ab66 | 509 | { |
3848ab66 | 510 | lockdep_assert_held(&mvm->mutex); |
777c9b6b JB |
511 | |
512 | mvm->rx_stats = *rx_stats; | |
3848ab66 MG |
513 | } |
514 | ||
a20fd398 | 515 | struct iwl_mvm_stat_data { |
a20fd398 | 516 | struct iwl_mvm *mvm; |
777c9b6b | 517 | __le32 mac_id; |
62e004fe | 518 | u8 beacon_filter_average_energy; |
0e7ac018 | 519 | void *general; |
a20fd398 AO |
520 | }; |
521 | ||
522 | static void iwl_mvm_stat_iterator(void *_data, u8 *mac, | |
523 | struct ieee80211_vif *vif) | |
524 | { | |
525 | struct iwl_mvm_stat_data *data = _data; | |
a20fd398 | 526 | struct iwl_mvm *mvm = data->mvm; |
777c9b6b | 527 | int sig = -data->beacon_filter_average_energy; |
a20fd398 AO |
528 | int last_event; |
529 | int thold = vif->bss_conf.cqm_rssi_thold; | |
530 | int hyst = vif->bss_conf.cqm_rssi_hyst; | |
777c9b6b | 531 | u16 id = le32_to_cpu(data->mac_id); |
a20fd398 AO |
532 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); |
533 | ||
33cef925 JB |
534 | /* This doesn't need the MAC ID check since it's not taking the |
535 | * data copied into the "data" struct, but rather the data from | |
536 | * the notification directly. | |
537 | */ | |
538 | if (data->general) { | |
0e7ac018 SS |
539 | u16 vif_id = mvmvif->id; |
540 | ||
541 | if (iwl_mvm_is_cdb_supported(mvm)) { | |
542 | struct mvm_statistics_general_cdb *general = | |
543 | data->general; | |
544 | ||
545 | mvmvif->beacon_stats.num_beacons = | |
546 | le32_to_cpu(general->beacon_counter[vif_id]); | |
547 | mvmvif->beacon_stats.avg_signal = | |
548 | -general->beacon_average_energy[vif_id]; | |
549 | } else { | |
550 | struct mvm_statistics_general_v8 *general = | |
551 | data->general; | |
552 | ||
553 | mvmvif->beacon_stats.num_beacons = | |
554 | le32_to_cpu(general->beacon_counter[vif_id]); | |
555 | mvmvif->beacon_stats.avg_signal = | |
556 | -general->beacon_average_energy[vif_id]; | |
557 | } | |
558 | ||
33cef925 JB |
559 | } |
560 | ||
a20fd398 AO |
561 | if (mvmvif->id != id) |
562 | return; | |
563 | ||
564 | if (vif->type != NL80211_IFTYPE_STATION) | |
565 | return; | |
566 | ||
8047cc0c AB |
567 | if (sig == 0) { |
568 | IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n"); | |
569 | return; | |
570 | } | |
571 | ||
a20fd398 AO |
572 | mvmvif->bf_data.ave_beacon_signal = sig; |
573 | ||
911222b5 AO |
574 | /* BT Coex */ |
575 | if (mvmvif->bf_data.bt_coex_min_thold != | |
576 | mvmvif->bf_data.bt_coex_max_thold) { | |
577 | last_event = mvmvif->bf_data.last_bt_coex_event; | |
578 | if (sig > mvmvif->bf_data.bt_coex_max_thold && | |
579 | (last_event <= mvmvif->bf_data.bt_coex_min_thold || | |
580 | last_event == 0)) { | |
581 | mvmvif->bf_data.last_bt_coex_event = sig; | |
582 | IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", | |
583 | sig); | |
584 | iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); | |
585 | } else if (sig < mvmvif->bf_data.bt_coex_min_thold && | |
586 | (last_event >= mvmvif->bf_data.bt_coex_max_thold || | |
587 | last_event == 0)) { | |
588 | mvmvif->bf_data.last_bt_coex_event = sig; | |
589 | IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", | |
590 | sig); | |
591 | iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); | |
592 | } | |
593 | } | |
594 | ||
a20fd398 AO |
595 | if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) |
596 | return; | |
597 | ||
598 | /* CQM Notification */ | |
599 | last_event = mvmvif->bf_data.last_cqm_event; | |
600 | if (thold && sig < thold && (last_event == 0 || | |
601 | sig < last_event - hyst)) { | |
602 | mvmvif->bf_data.last_cqm_event = sig; | |
603 | IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", | |
604 | sig); | |
605 | ieee80211_cqm_rssi_notify( | |
606 | vif, | |
607 | NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, | |
769f07d8 | 608 | sig, |
a20fd398 AO |
609 | GFP_KERNEL); |
610 | } else if (sig > thold && | |
611 | (last_event == 0 || sig > last_event + hyst)) { | |
612 | mvmvif->bf_data.last_cqm_event = sig; | |
613 | IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", | |
614 | sig); | |
615 | ieee80211_cqm_rssi_notify( | |
616 | vif, | |
617 | NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, | |
769f07d8 | 618 | sig, |
a20fd398 AO |
619 | GFP_KERNEL); |
620 | } | |
621 | } | |
622 | ||
5a756c20 EG |
623 | static inline void |
624 | iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) | |
625 | { | |
626 | struct iwl_fw_dbg_trigger_tlv *trig; | |
627 | struct iwl_fw_dbg_trigger_stats *trig_stats; | |
628 | u32 trig_offset, trig_thold; | |
629 | ||
630 | if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS)) | |
631 | return; | |
632 | ||
633 | trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS); | |
634 | trig_stats = (void *)trig->data; | |
635 | ||
636 | if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) | |
637 | return; | |
638 | ||
639 | trig_offset = le32_to_cpu(trig_stats->stop_offset); | |
640 | trig_thold = le32_to_cpu(trig_stats->stop_threshold); | |
641 | ||
642 | if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt))) | |
643 | return; | |
644 | ||
645 | if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold) | |
646 | return; | |
647 | ||
5d4f929e | 648 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL); |
5a756c20 EG |
649 | } |
650 | ||
91a8bcde JB |
651 | void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, |
652 | struct iwl_rx_packet *pkt) | |
9ee718aa | 653 | { |
0e7ac018 | 654 | struct iwl_notif_statistics_cdb *stats = (void *)&pkt->data; |
a20fd398 | 655 | struct iwl_mvm_stat_data data = { |
a20fd398 AO |
656 | .mvm = mvm, |
657 | }; | |
0e7ac018 | 658 | int expected_size; |
cfbeb598 GM |
659 | int i; |
660 | u8 *energy; | |
661 | __le32 *bytes, *air_time; | |
0e7ac018 SS |
662 | |
663 | if (iwl_mvm_is_cdb_supported(mvm)) | |
664 | expected_size = sizeof(*stats); | |
665 | else if (iwl_mvm_has_new_rx_api(mvm)) | |
666 | expected_size = sizeof(struct iwl_notif_statistics_v11); | |
667 | else | |
668 | expected_size = sizeof(struct iwl_notif_statistics_v10); | |
777c9b6b | 669 | |
6a90f85a LC |
670 | if (iwl_rx_packet_payload_len(pkt) != expected_size) { |
671 | IWL_ERR(mvm, "received invalid statistics size (%d)!\n", | |
672 | iwl_rx_packet_payload_len(pkt)); | |
673 | return; | |
674 | } | |
777c9b6b | 675 | |
38d5f66f EG |
676 | data.mac_id = stats->rx.general.mac_id; |
677 | data.beacon_filter_average_energy = | |
0e7ac018 | 678 | stats->general.common.beacon_filter_average_energy; |
777c9b6b | 679 | |
38d5f66f | 680 | iwl_mvm_update_rx_statistics(mvm, &stats->rx); |
777c9b6b | 681 | |
0e7ac018 SS |
682 | mvm->radio_stats.rx_time = le64_to_cpu(stats->general.common.rx_time); |
683 | mvm->radio_stats.tx_time = le64_to_cpu(stats->general.common.tx_time); | |
38d5f66f | 684 | mvm->radio_stats.on_time_rf = |
0e7ac018 | 685 | le64_to_cpu(stats->general.common.on_time_rf); |
38d5f66f | 686 | mvm->radio_stats.on_time_scan = |
0e7ac018 | 687 | le64_to_cpu(stats->general.common.on_time_scan); |
91a8bcde | 688 | |
38d5f66f | 689 | data.general = &stats->general; |
9ee718aa | 690 | |
5a756c20 EG |
691 | iwl_mvm_rx_stats_check_trigger(mvm, pkt); |
692 | ||
a20fd398 AO |
693 | ieee80211_iterate_active_interfaces(mvm->hw, |
694 | IEEE80211_IFACE_ITER_NORMAL, | |
695 | iwl_mvm_stat_iterator, | |
696 | &data); | |
cfbeb598 GM |
697 | |
698 | if (!iwl_mvm_has_new_rx_api(mvm)) | |
699 | return; | |
700 | ||
701 | if (!iwl_mvm_is_cdb_supported(mvm)) { | |
702 | struct iwl_notif_statistics_v11 *v11 = | |
703 | (void *)&pkt->data; | |
704 | ||
705 | energy = (void *)&v11->load_stats.avg_energy; | |
706 | bytes = (void *)&v11->load_stats.byte_count; | |
707 | air_time = (void *)&v11->load_stats.air_time; | |
708 | } else { | |
709 | energy = (void *)&stats->load_stats.avg_energy; | |
710 | bytes = (void *)&stats->load_stats.byte_count; | |
711 | air_time = (void *)&stats->load_stats.air_time; | |
712 | } | |
713 | ||
714 | rcu_read_lock(); | |
715 | for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { | |
716 | struct iwl_mvm_sta *sta; | |
717 | ||
718 | if (!energy[i]) | |
719 | continue; | |
720 | ||
721 | sta = iwl_mvm_sta_from_staid_rcu(mvm, i); | |
722 | if (!sta) | |
723 | continue; | |
724 | sta->avg_energy = energy[i]; | |
725 | } | |
726 | rcu_read_unlock(); | |
91a8bcde JB |
727 | } |
728 | ||
0416841d | 729 | void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
91a8bcde JB |
730 | { |
731 | iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); | |
9ee718aa | 732 | } |
3af512d6 SS |
733 | |
734 | void iwl_mvm_window_status_notif(struct iwl_mvm *mvm, | |
735 | struct iwl_rx_cmd_buffer *rxb) | |
736 | { | |
737 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
738 | struct iwl_ba_window_status_notif *notif = (void *)pkt->data; | |
739 | int i; | |
740 | u32 pkt_len = iwl_rx_packet_payload_len(pkt); | |
741 | ||
742 | if (WARN_ONCE(pkt_len != sizeof(*notif), | |
743 | "Received window status notification of wrong size (%u)\n", | |
744 | pkt_len)) | |
745 | return; | |
746 | ||
747 | rcu_read_lock(); | |
748 | for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) { | |
749 | struct ieee80211_sta *sta; | |
750 | u8 sta_id, tid; | |
751 | u64 bitmap; | |
752 | u32 ssn; | |
753 | u16 ratid; | |
754 | u16 received_mpdu; | |
755 | ||
756 | ratid = le16_to_cpu(notif->ra_tid[i]); | |
757 | /* check that this TID is valid */ | |
758 | if (!(ratid & BA_WINDOW_STATUS_VALID_MSK)) | |
759 | continue; | |
760 | ||
761 | received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]); | |
762 | if (received_mpdu == 0) | |
763 | continue; | |
764 | ||
765 | tid = ratid & BA_WINDOW_STATUS_TID_MSK; | |
766 | /* get the station */ | |
767 | sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK) | |
768 | >> BA_WINDOW_STATUS_STA_ID_POS; | |
769 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
770 | if (IS_ERR_OR_NULL(sta)) | |
771 | continue; | |
772 | bitmap = le64_to_cpu(notif->bitmap[i]); | |
773 | ssn = le32_to_cpu(notif->start_seq_num[i]); | |
774 | ||
775 | /* update mac80211 with the bitmap for the reordering buffer */ | |
776 | ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap, | |
777 | received_mpdu); | |
778 | } | |
779 | rcu_read_unlock(); | |
780 | } |