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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 |
8ca151b5 JB |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of version 2 of the GNU General Public License as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
23 | * USA | |
24 | * | |
25 | * The full GNU General Public License is included in this distribution | |
410dc5aa | 26 | * in the file called COPYING. |
8ca151b5 JB |
27 | * |
28 | * Contact Information: | |
29 | * Intel Linux Wireless <ilw@linux.intel.com> | |
30 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
31 | * | |
32 | * BSD LICENSE | |
33 | * | |
51368bf7 | 34 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
777c9b6b | 35 | * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH |
8ca151b5 JB |
36 | * All rights reserved. |
37 | * | |
38 | * Redistribution and use in source and binary forms, with or without | |
39 | * modification, are permitted provided that the following conditions | |
40 | * are met: | |
41 | * | |
42 | * * Redistributions of source code must retain the above copyright | |
43 | * notice, this list of conditions and the following disclaimer. | |
44 | * * Redistributions in binary form must reproduce the above copyright | |
45 | * notice, this list of conditions and the following disclaimer in | |
46 | * the documentation and/or other materials provided with the | |
47 | * distribution. | |
48 | * * Neither the name Intel Corporation nor the names of its | |
49 | * contributors may be used to endorse or promote products derived | |
50 | * from this software without specific prior written permission. | |
51 | * | |
52 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
53 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
54 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
55 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
56 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
57 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
58 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
59 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
60 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
61 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
62 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
63 | *****************************************************************************/ | |
93190fb0 | 64 | #include <linux/skbuff.h> |
8ca151b5 | 65 | #include "iwl-trans.h" |
8ca151b5 JB |
66 | #include "mvm.h" |
67 | #include "fw-api.h" | |
68 | ||
69 | /* | |
70 | * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler | |
71 | * | |
72 | * Copies the phy information in mvm->last_phy_info, it will be used when the | |
73 | * actual data will come from the fw in the next packet. | |
74 | */ | |
0416841d | 75 | void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
8ca151b5 JB |
76 | { |
77 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
78 | ||
79 | memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info)); | |
80 | mvm->ampdu_ref++; | |
5fc0f76c ES |
81 | |
82 | #ifdef CONFIG_IWLWIFI_DEBUGFS | |
83 | if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { | |
84 | spin_lock(&mvm->drv_stats_lock); | |
85 | mvm->drv_rx_stats.ampdu_count++; | |
86 | spin_unlock(&mvm->drv_stats_lock); | |
87 | } | |
88 | #endif | |
8ca151b5 JB |
89 | } |
90 | ||
91 | /* | |
92 | * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211 | |
93 | * | |
94 | * Adds the rxb to a new skb and give it to mac80211 | |
95 | */ | |
96 | static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, | |
1be5d8cc | 97 | struct napi_struct *napi, |
d0963b5d | 98 | struct sk_buff *skb, |
8ca151b5 | 99 | struct ieee80211_hdr *hdr, u16 len, |
eb96ccb1 | 100 | u32 ampdu_status, u8 crypt_len, |
d0963b5d | 101 | struct iwl_rx_cmd_buffer *rxb) |
8ca151b5 | 102 | { |
8ca151b5 JB |
103 | unsigned int hdrlen, fraglen; |
104 | ||
8ca151b5 | 105 | /* If frame is small enough to fit in skb->head, pull it completely. |
3771a890 JB |
106 | * If not, only pull ieee80211_hdr (including crypto if present, and |
107 | * an additional 8 bytes for SNAP/ethertype, see below) so that | |
108 | * splice() or TCP coalesce are more efficient. | |
109 | * | |
110 | * Since, in addition, ieee80211_data_to_8023() always pull in at | |
111 | * least 8 bytes (possibly more for mesh) we can do the same here | |
112 | * to save the cost of doing it later. That still doesn't pull in | |
113 | * the actual IP header since the typical case has a SNAP header. | |
114 | * If the latter changes (there are efforts in the standards group | |
115 | * to do so) we should revisit this and ieee80211_data_to_8023(). | |
8ca151b5 | 116 | */ |
3771a890 JB |
117 | hdrlen = (len <= skb_tailroom(skb)) ? len : |
118 | sizeof(*hdr) + crypt_len + 8; | |
8ca151b5 JB |
119 | |
120 | memcpy(skb_put(skb, hdrlen), hdr, hdrlen); | |
121 | fraglen = len - hdrlen; | |
122 | ||
123 | if (fraglen) { | |
124 | int offset = (void *)hdr + hdrlen - | |
125 | rxb_addr(rxb) + rxb_offset(rxb); | |
126 | ||
127 | skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, | |
128 | fraglen, rxb->truesize); | |
129 | } | |
130 | ||
1be5d8cc | 131 | ieee80211_rx_napi(mvm->hw, skb, napi); |
8ca151b5 JB |
132 | } |
133 | ||
a2d7b870 AA |
134 | /* |
135 | * iwl_mvm_get_signal_strength - use new rx PHY INFO API | |
17dbe564 AA |
136 | * values are reported by the fw as positive values - need to negate |
137 | * to obtain their dBM. Account for missing antennas by replacing 0 | |
138 | * values by -256dBm: practically 0 power and a non-feasible 8 bit value. | |
a2d7b870 | 139 | */ |
226eb8cd JB |
140 | static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, |
141 | struct iwl_rx_phy_info *phy_info, | |
142 | struct ieee80211_rx_status *rx_status) | |
a2d7b870 AA |
143 | { |
144 | int energy_a, energy_b, energy_c, max_energy; | |
145 | u32 val; | |
146 | ||
147 | val = | |
148 | le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]); | |
17dbe564 AA |
149 | energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >> |
150 | IWL_RX_INFO_ENERGY_ANT_A_POS; | |
2cddddc5 | 151 | energy_a = energy_a ? -energy_a : S8_MIN; |
17dbe564 AA |
152 | energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >> |
153 | IWL_RX_INFO_ENERGY_ANT_B_POS; | |
2cddddc5 | 154 | energy_b = energy_b ? -energy_b : S8_MIN; |
17dbe564 AA |
155 | energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >> |
156 | IWL_RX_INFO_ENERGY_ANT_C_POS; | |
2cddddc5 | 157 | energy_c = energy_c ? -energy_c : S8_MIN; |
a2d7b870 AA |
158 | max_energy = max(energy_a, energy_b); |
159 | max_energy = max(max_energy, energy_c); | |
160 | ||
161 | IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n", | |
162 | energy_a, energy_b, energy_c, max_energy); | |
163 | ||
226eb8cd JB |
164 | rx_status->signal = max_energy; |
165 | rx_status->chains = (le16_to_cpu(phy_info->phy_flags) & | |
166 | RX_RES_PHY_FLAGS_ANTENNA) | |
167 | >> RX_RES_PHY_FLAGS_ANTENNA_POS; | |
168 | rx_status->chain_signal[0] = energy_a; | |
169 | rx_status->chain_signal[1] = energy_b; | |
170 | rx_status->chain_signal[2] = energy_c; | |
a2d7b870 AA |
171 | } |
172 | ||
8ca151b5 JB |
173 | /* |
174 | * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format | |
175 | * @mvm: the mvm object | |
176 | * @hdr: 80211 header | |
177 | * @stats: status in mac80211's format | |
178 | * @rx_pkt_status: status coming from fw | |
179 | * | |
180 | * returns non 0 value if the packet should be dropped | |
181 | */ | |
182 | static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm, | |
183 | struct ieee80211_hdr *hdr, | |
184 | struct ieee80211_rx_status *stats, | |
eb96ccb1 JB |
185 | u32 rx_pkt_status, |
186 | u8 *crypt_len) | |
8ca151b5 JB |
187 | { |
188 | if (!ieee80211_has_protected(hdr->frame_control) || | |
189 | (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == | |
190 | RX_MPDU_RES_STATUS_SEC_NO_ENC) | |
191 | return 0; | |
192 | ||
193 | /* packet was encrypted with unknown alg */ | |
194 | if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == | |
195 | RX_MPDU_RES_STATUS_SEC_ENC_ERR) | |
196 | return 0; | |
197 | ||
198 | switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) { | |
199 | case RX_MPDU_RES_STATUS_SEC_CCM_ENC: | |
200 | /* alg is CCM: check MIC only */ | |
201 | if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) | |
202 | return -1; | |
203 | ||
204 | stats->flag |= RX_FLAG_DECRYPTED; | |
205 | IWL_DEBUG_WEP(mvm, "hw decrypted CCMP successfully\n"); | |
eb96ccb1 | 206 | *crypt_len = IEEE80211_CCMP_HDR_LEN; |
8ca151b5 JB |
207 | return 0; |
208 | ||
209 | case RX_MPDU_RES_STATUS_SEC_TKIP_ENC: | |
210 | /* Don't drop the frame and decrypt it in SW */ | |
211 | if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK)) | |
212 | return 0; | |
eb96ccb1 | 213 | *crypt_len = IEEE80211_TKIP_IV_LEN; |
8ca151b5 JB |
214 | /* fall through if TTAK OK */ |
215 | ||
216 | case RX_MPDU_RES_STATUS_SEC_WEP_ENC: | |
217 | if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK)) | |
218 | return -1; | |
219 | ||
220 | stats->flag |= RX_FLAG_DECRYPTED; | |
eb96ccb1 JB |
221 | if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == |
222 | RX_MPDU_RES_STATUS_SEC_WEP_ENC) | |
223 | *crypt_len = IEEE80211_WEP_IV_LEN; | |
8ca151b5 JB |
224 | return 0; |
225 | ||
e36e5433 MS |
226 | case RX_MPDU_RES_STATUS_SEC_EXT_ENC: |
227 | if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) | |
228 | return -1; | |
229 | stats->flag |= RX_FLAG_DECRYPTED; | |
230 | return 0; | |
231 | ||
8ca151b5 JB |
232 | default: |
233 | IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); | |
234 | } | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
93190fb0 AA |
239 | static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, |
240 | struct sk_buff *skb, | |
241 | u32 status) | |
242 | { | |
243 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
244 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); | |
245 | ||
246 | if (mvmvif->features & NETIF_F_RXCSUM && | |
247 | status & RX_MPDU_RES_STATUS_CSUM_DONE && | |
248 | status & RX_MPDU_RES_STATUS_CSUM_OK) | |
249 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
250 | } | |
251 | ||
8ca151b5 JB |
252 | /* |
253 | * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler | |
254 | * | |
255 | * Handles the actual data of the Rx packet from the fw | |
256 | */ | |
1be5d8cc JB |
257 | void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi, |
258 | struct iwl_rx_cmd_buffer *rxb) | |
8ca151b5 JB |
259 | { |
260 | struct ieee80211_hdr *hdr; | |
d0963b5d | 261 | struct ieee80211_rx_status *rx_status; |
8ca151b5 JB |
262 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
263 | struct iwl_rx_phy_info *phy_info; | |
264 | struct iwl_rx_mpdu_res_start *rx_res; | |
361dbec8 | 265 | struct ieee80211_sta *sta; |
d0963b5d | 266 | struct sk_buff *skb; |
8ca151b5 JB |
267 | u32 len; |
268 | u32 ampdu_status; | |
269 | u32 rate_n_flags; | |
270 | u32 rx_pkt_status; | |
eb96ccb1 | 271 | u8 crypt_len = 0; |
8ca151b5 JB |
272 | |
273 | phy_info = &mvm->last_phy_info; | |
274 | rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; | |
275 | hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); | |
276 | len = le16_to_cpu(rx_res->byte_count); | |
277 | rx_pkt_status = le32_to_cpup((__le32 *) | |
278 | (pkt->data + sizeof(*rx_res) + len)); | |
279 | ||
d0963b5d JB |
280 | /* Dont use dev_alloc_skb(), we'll have enough headroom once |
281 | * ieee80211_hdr pulled. | |
282 | */ | |
283 | skb = alloc_skb(128, GFP_ATOMIC); | |
284 | if (!skb) { | |
285 | IWL_ERR(mvm, "alloc_skb failed\n"); | |
0416841d | 286 | return; |
d0963b5d JB |
287 | } |
288 | ||
289 | rx_status = IEEE80211_SKB_RXCB(skb); | |
8ca151b5 JB |
290 | |
291 | /* | |
292 | * drop the packet if it has failed being decrypted by HW | |
293 | */ | |
eb96ccb1 JB |
294 | if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status, |
295 | &crypt_len)) { | |
8ca151b5 JB |
296 | IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", |
297 | rx_pkt_status); | |
d0963b5d | 298 | kfree_skb(skb); |
0416841d | 299 | return; |
8ca151b5 JB |
300 | } |
301 | ||
302 | if ((unlikely(phy_info->cfg_phy_cnt > 20))) { | |
303 | IWL_DEBUG_DROP(mvm, "dsp size out of range [0,20]: %d\n", | |
304 | phy_info->cfg_phy_cnt); | |
d0963b5d | 305 | kfree_skb(skb); |
0416841d | 306 | return; |
8ca151b5 JB |
307 | } |
308 | ||
fb8b8ee1 JB |
309 | /* |
310 | * Keep packets with CRC errors (and with overrun) for monitor mode | |
311 | * (otherwise the firmware discards them) but mark them as bad. | |
312 | */ | |
8ca151b5 JB |
313 | if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || |
314 | !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { | |
315 | IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); | |
d0963b5d | 316 | rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; |
8ca151b5 JB |
317 | } |
318 | ||
319 | /* This will be used in several places later */ | |
320 | rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); | |
321 | ||
322 | /* rx_status carries information about the packet to mac80211 */ | |
d0963b5d JB |
323 | rx_status->mactime = le64_to_cpu(phy_info->timestamp); |
324 | rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp); | |
325 | rx_status->band = | |
8ca151b5 JB |
326 | (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? |
327 | IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; | |
d0963b5d | 328 | rx_status->freq = |
8ca151b5 | 329 | ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), |
d0963b5d | 330 | rx_status->band); |
8ca151b5 JB |
331 | /* |
332 | * TSF as indicated by the fw is at INA time, but mac80211 expects the | |
333 | * TSF at the beginning of the MPDU. | |
334 | */ | |
d0963b5d | 335 | /*rx_status->flag |= RX_FLAG_MACTIME_MPDU;*/ |
8ca151b5 | 336 | |
d0963b5d | 337 | iwl_mvm_get_signal_strength(mvm, phy_info, rx_status); |
8ca151b5 | 338 | |
d0963b5d JB |
339 | IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal, |
340 | (unsigned long long)rx_status->mactime); | |
8ca151b5 | 341 | |
361dbec8 ES |
342 | rcu_read_lock(); |
343 | /* | |
344 | * We have tx blocked stations (with CS bit). If we heard frames from | |
345 | * a blocked station on a new channel we can TX to it again. | |
346 | */ | |
347 | if (unlikely(mvm->csa_tx_block_bcn_timeout)) { | |
348 | sta = ieee80211_find_sta( | |
349 | rcu_dereference(mvm->csa_tx_blocked_vif), hdr->addr2); | |
350 | if (sta) | |
351 | iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false); | |
352 | } | |
353 | ||
354 | /* This is fine since we don't support multiple AP interfaces */ | |
355 | sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); | |
356 | if (sta) { | |
357 | struct iwl_mvm_sta *mvmsta; | |
358 | mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
d0963b5d | 359 | rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status); |
3ec50b5e EG |
360 | |
361 | if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) && | |
362 | ieee80211_is_beacon(hdr->frame_control)) { | |
363 | struct iwl_fw_dbg_trigger_tlv *trig; | |
364 | struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; | |
365 | bool trig_check; | |
366 | s32 rssi; | |
367 | ||
368 | trig = iwl_fw_dbg_get_trigger(mvm->fw, | |
369 | FW_DBG_TRIGGER_RSSI); | |
370 | rssi_trig = (void *)trig->data; | |
371 | rssi = le32_to_cpu(rssi_trig->rssi); | |
372 | ||
373 | trig_check = | |
374 | iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif, | |
375 | trig); | |
376 | if (trig_check && rx_status->signal < rssi) | |
5d4f929e | 377 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL); |
3ec50b5e | 378 | } |
361dbec8 ES |
379 | } |
380 | ||
93190fb0 AA |
381 | if (sta && ieee80211_is_data(hdr->frame_control)) |
382 | iwl_mvm_rx_csum(sta, skb, rx_pkt_status); | |
383 | ||
361dbec8 ES |
384 | rcu_read_unlock(); |
385 | ||
8ca151b5 JB |
386 | /* set the preamble flag if appropriate */ |
387 | if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) | |
d0963b5d | 388 | rx_status->flag |= RX_FLAG_SHORTPRE; |
8ca151b5 JB |
389 | |
390 | if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { | |
391 | /* | |
392 | * We know which subframes of an A-MPDU belong | |
393 | * together since we get a single PHY response | |
394 | * from the firmware for all of them | |
395 | */ | |
d0963b5d JB |
396 | rx_status->flag |= RX_FLAG_AMPDU_DETAILS; |
397 | rx_status->ampdu_reference = mvm->ampdu_ref; | |
8ca151b5 JB |
398 | } |
399 | ||
400 | /* Set up the HT phy flags */ | |
401 | switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { | |
402 | case RATE_MCS_CHAN_WIDTH_20: | |
403 | break; | |
404 | case RATE_MCS_CHAN_WIDTH_40: | |
d0963b5d | 405 | rx_status->flag |= RX_FLAG_40MHZ; |
8ca151b5 JB |
406 | break; |
407 | case RATE_MCS_CHAN_WIDTH_80: | |
d0963b5d | 408 | rx_status->vht_flag |= RX_VHT_FLAG_80MHZ; |
8ca151b5 JB |
409 | break; |
410 | case RATE_MCS_CHAN_WIDTH_160: | |
d0963b5d | 411 | rx_status->vht_flag |= RX_VHT_FLAG_160MHZ; |
8ca151b5 JB |
412 | break; |
413 | } | |
414 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
d0963b5d | 415 | rx_status->flag |= RX_FLAG_SHORT_GI; |
8ca151b5 | 416 | if (rate_n_flags & RATE_HT_MCS_GF_MSK) |
d0963b5d | 417 | rx_status->flag |= RX_FLAG_HT_GF; |
7b1dd048 | 418 | if (rate_n_flags & RATE_MCS_LDPC_MSK) |
d0963b5d | 419 | rx_status->flag |= RX_FLAG_LDPC; |
8ca151b5 | 420 | if (rate_n_flags & RATE_MCS_HT_MSK) { |
7b1dd048 EG |
421 | u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >> |
422 | RATE_MCS_STBC_POS; | |
d0963b5d JB |
423 | rx_status->flag |= RX_FLAG_HT; |
424 | rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; | |
425 | rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT; | |
8ca151b5 | 426 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { |
7b1dd048 EG |
427 | u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >> |
428 | RATE_MCS_STBC_POS; | |
d0963b5d | 429 | rx_status->vht_nss = |
8ca151b5 JB |
430 | ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> |
431 | RATE_VHT_MCS_NSS_POS) + 1; | |
d0963b5d JB |
432 | rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; |
433 | rx_status->flag |= RX_FLAG_VHT; | |
434 | rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT; | |
95e05ab7 | 435 | if (rate_n_flags & RATE_MCS_BF_MSK) |
d0963b5d | 436 | rx_status->vht_flag |= RX_VHT_FLAG_BF; |
8ca151b5 | 437 | } else { |
d0963b5d | 438 | rx_status->rate_idx = |
8ca151b5 | 439 | iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, |
d0963b5d | 440 | rx_status->band); |
8ca151b5 JB |
441 | } |
442 | ||
5fc0f76c | 443 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
2f15a829 | 444 | iwl_mvm_update_frame_stats(mvm, rate_n_flags, |
d0963b5d | 445 | rx_status->flag & RX_FLAG_AMPDU_DETAILS); |
5fc0f76c | 446 | #endif |
1be5d8cc | 447 | iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, hdr, len, ampdu_status, |
eb96ccb1 | 448 | crypt_len, rxb); |
8ca151b5 | 449 | } |
9ee718aa | 450 | |
3848ab66 | 451 | static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm, |
777c9b6b | 452 | struct mvm_statistics_rx *rx_stats) |
3848ab66 | 453 | { |
3848ab66 | 454 | lockdep_assert_held(&mvm->mutex); |
777c9b6b JB |
455 | |
456 | mvm->rx_stats = *rx_stats; | |
3848ab66 MG |
457 | } |
458 | ||
a20fd398 | 459 | struct iwl_mvm_stat_data { |
a20fd398 | 460 | struct iwl_mvm *mvm; |
777c9b6b JB |
461 | __le32 mac_id; |
462 | __s8 beacon_filter_average_energy; | |
33cef925 | 463 | struct mvm_statistics_general_v8 *general; |
a20fd398 AO |
464 | }; |
465 | ||
466 | static void iwl_mvm_stat_iterator(void *_data, u8 *mac, | |
467 | struct ieee80211_vif *vif) | |
468 | { | |
469 | struct iwl_mvm_stat_data *data = _data; | |
a20fd398 | 470 | struct iwl_mvm *mvm = data->mvm; |
777c9b6b | 471 | int sig = -data->beacon_filter_average_energy; |
a20fd398 AO |
472 | int last_event; |
473 | int thold = vif->bss_conf.cqm_rssi_thold; | |
474 | int hyst = vif->bss_conf.cqm_rssi_hyst; | |
777c9b6b | 475 | u16 id = le32_to_cpu(data->mac_id); |
a20fd398 AO |
476 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); |
477 | ||
33cef925 JB |
478 | /* This doesn't need the MAC ID check since it's not taking the |
479 | * data copied into the "data" struct, but rather the data from | |
480 | * the notification directly. | |
481 | */ | |
482 | if (data->general) { | |
483 | mvmvif->beacon_stats.num_beacons = | |
484 | le32_to_cpu(data->general->beacon_counter[mvmvif->id]); | |
485 | mvmvif->beacon_stats.avg_signal = | |
486 | -data->general->beacon_average_energy[mvmvif->id]; | |
487 | } | |
488 | ||
a20fd398 AO |
489 | if (mvmvif->id != id) |
490 | return; | |
491 | ||
492 | if (vif->type != NL80211_IFTYPE_STATION) | |
493 | return; | |
494 | ||
8047cc0c AB |
495 | if (sig == 0) { |
496 | IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n"); | |
497 | return; | |
498 | } | |
499 | ||
a20fd398 AO |
500 | mvmvif->bf_data.ave_beacon_signal = sig; |
501 | ||
911222b5 AO |
502 | /* BT Coex */ |
503 | if (mvmvif->bf_data.bt_coex_min_thold != | |
504 | mvmvif->bf_data.bt_coex_max_thold) { | |
505 | last_event = mvmvif->bf_data.last_bt_coex_event; | |
506 | if (sig > mvmvif->bf_data.bt_coex_max_thold && | |
507 | (last_event <= mvmvif->bf_data.bt_coex_min_thold || | |
508 | last_event == 0)) { | |
509 | mvmvif->bf_data.last_bt_coex_event = sig; | |
510 | IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n", | |
511 | sig); | |
512 | iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH); | |
513 | } else if (sig < mvmvif->bf_data.bt_coex_min_thold && | |
514 | (last_event >= mvmvif->bf_data.bt_coex_max_thold || | |
515 | last_event == 0)) { | |
516 | mvmvif->bf_data.last_bt_coex_event = sig; | |
517 | IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n", | |
518 | sig); | |
519 | iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW); | |
520 | } | |
521 | } | |
522 | ||
a20fd398 AO |
523 | if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) |
524 | return; | |
525 | ||
526 | /* CQM Notification */ | |
527 | last_event = mvmvif->bf_data.last_cqm_event; | |
528 | if (thold && sig < thold && (last_event == 0 || | |
529 | sig < last_event - hyst)) { | |
530 | mvmvif->bf_data.last_cqm_event = sig; | |
531 | IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n", | |
532 | sig); | |
533 | ieee80211_cqm_rssi_notify( | |
534 | vif, | |
535 | NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, | |
536 | GFP_KERNEL); | |
537 | } else if (sig > thold && | |
538 | (last_event == 0 || sig > last_event + hyst)) { | |
539 | mvmvif->bf_data.last_cqm_event = sig; | |
540 | IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n", | |
541 | sig); | |
542 | ieee80211_cqm_rssi_notify( | |
543 | vif, | |
544 | NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, | |
545 | GFP_KERNEL); | |
546 | } | |
547 | } | |
548 | ||
5a756c20 EG |
549 | static inline void |
550 | iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt) | |
551 | { | |
552 | struct iwl_fw_dbg_trigger_tlv *trig; | |
553 | struct iwl_fw_dbg_trigger_stats *trig_stats; | |
554 | u32 trig_offset, trig_thold; | |
555 | ||
556 | if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_STATS)) | |
557 | return; | |
558 | ||
559 | trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS); | |
560 | trig_stats = (void *)trig->data; | |
561 | ||
562 | if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) | |
563 | return; | |
564 | ||
565 | trig_offset = le32_to_cpu(trig_stats->stop_offset); | |
566 | trig_thold = le32_to_cpu(trig_stats->stop_threshold); | |
567 | ||
568 | if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt))) | |
569 | return; | |
570 | ||
571 | if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold) | |
572 | return; | |
573 | ||
5d4f929e | 574 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL); |
5a756c20 EG |
575 | } |
576 | ||
91a8bcde JB |
577 | void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm, |
578 | struct iwl_rx_packet *pkt) | |
9ee718aa | 579 | { |
777c9b6b JB |
580 | size_t v8_len = sizeof(struct iwl_notif_statistics_v8); |
581 | size_t v10_len = sizeof(struct iwl_notif_statistics_v10); | |
a20fd398 | 582 | struct iwl_mvm_stat_data data = { |
a20fd398 AO |
583 | .mvm = mvm, |
584 | }; | |
777c9b6b JB |
585 | u32 temperature; |
586 | ||
859d914c | 587 | if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STATS_V10)) { |
777c9b6b JB |
588 | struct iwl_notif_statistics_v10 *stats = (void *)&pkt->data; |
589 | ||
590 | if (iwl_rx_packet_payload_len(pkt) != v10_len) | |
591 | goto invalid; | |
592 | ||
593 | temperature = le32_to_cpu(stats->general.radio_temperature); | |
594 | data.mac_id = stats->rx.general.mac_id; | |
595 | data.beacon_filter_average_energy = | |
596 | stats->general.beacon_filter_average_energy; | |
597 | ||
598 | iwl_mvm_update_rx_statistics(mvm, &stats->rx); | |
91a8bcde JB |
599 | |
600 | mvm->radio_stats.rx_time = le64_to_cpu(stats->general.rx_time); | |
601 | mvm->radio_stats.tx_time = le64_to_cpu(stats->general.tx_time); | |
602 | mvm->radio_stats.on_time_rf = | |
603 | le64_to_cpu(stats->general.on_time_rf); | |
604 | mvm->radio_stats.on_time_scan = | |
605 | le64_to_cpu(stats->general.on_time_scan); | |
33cef925 JB |
606 | |
607 | data.general = &stats->general; | |
777c9b6b JB |
608 | } else { |
609 | struct iwl_notif_statistics_v8 *stats = (void *)&pkt->data; | |
610 | ||
611 | if (iwl_rx_packet_payload_len(pkt) != v8_len) | |
612 | goto invalid; | |
613 | ||
614 | temperature = le32_to_cpu(stats->general.radio_temperature); | |
615 | data.mac_id = stats->rx.general.mac_id; | |
616 | data.beacon_filter_average_energy = | |
617 | stats->general.beacon_filter_average_energy; | |
618 | ||
619 | iwl_mvm_update_rx_statistics(mvm, &stats->rx); | |
620 | } | |
9ee718aa | 621 | |
5a756c20 EG |
622 | iwl_mvm_rx_stats_check_trigger(mvm, pkt); |
623 | ||
57d7b6a4 LC |
624 | /* Only handle rx statistics temperature changes if async temp |
625 | * notifications are not supported | |
626 | */ | |
859d914c | 627 | if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_ASYNC_DTM)) |
777c9b6b | 628 | iwl_mvm_tt_temp_changed(mvm, temperature); |
9ee718aa | 629 | |
a20fd398 AO |
630 | ieee80211_iterate_active_interfaces(mvm->hw, |
631 | IEEE80211_IFACE_ITER_NORMAL, | |
632 | iwl_mvm_stat_iterator, | |
633 | &data); | |
91a8bcde | 634 | return; |
777c9b6b JB |
635 | invalid: |
636 | IWL_ERR(mvm, "received invalid statistics size (%d)!\n", | |
637 | iwl_rx_packet_payload_len(pkt)); | |
91a8bcde JB |
638 | } |
639 | ||
0416841d | 640 | void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
91a8bcde JB |
641 | { |
642 | iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb)); | |
9ee718aa | 643 | } |