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780e87c2 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 | * | |
8 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. | |
9 | * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH | |
10 | * Copyright(c) 2015 Intel Deutschland GmbH | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of version 2 of the GNU General Public License as | |
14 | * published by the Free Software Foundation. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, but | |
17 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
20 | * | |
21 | * The full GNU General Public License is included in this distribution | |
22 | * in the file called COPYING. | |
23 | * | |
24 | * Contact Information: | |
25 | * Intel Linux Wireless <ilw@linux.intel.com> | |
26 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
27 | * | |
28 | * BSD LICENSE | |
29 | * | |
30 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. | |
31 | * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH | |
32 | * Copyright(c) 2015 Intel Deutschland GmbH | |
33 | * All rights reserved. | |
34 | * | |
35 | * Redistribution and use in source and binary forms, with or without | |
36 | * modification, are permitted provided that the following conditions | |
37 | * are met: | |
38 | * | |
39 | * * Redistributions of source code must retain the above copyright | |
40 | * notice, this list of conditions and the following disclaimer. | |
41 | * * Redistributions in binary form must reproduce the above copyright | |
42 | * notice, this list of conditions and the following disclaimer in | |
43 | * the documentation and/or other materials provided with the | |
44 | * distribution. | |
45 | * * Neither the name Intel Corporation nor the names of its | |
46 | * contributors may be used to endorse or promote products derived | |
47 | * from this software without specific prior written permission. | |
48 | * | |
49 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
50 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
51 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
52 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
53 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
54 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
55 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
56 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
57 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
58 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
59 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
60 | *****************************************************************************/ | |
61 | #include <linux/etherdevice.h> | |
62 | #include <linux/skbuff.h> | |
63 | #include "iwl-trans.h" | |
64 | #include "mvm.h" | |
65 | #include "fw-api.h" | |
66 | #include "fw-dbg.h" | |
67 | ||
68 | void iwl_mvm_rx_phy_cmd_mq(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) | |
69 | { | |
70 | mvm->ampdu_ref++; | |
71 | ||
72 | #ifdef CONFIG_IWLWIFI_DEBUGFS | |
73 | if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { | |
74 | spin_lock(&mvm->drv_stats_lock); | |
75 | mvm->drv_rx_stats.ampdu_count++; | |
76 | spin_unlock(&mvm->drv_stats_lock); | |
77 | } | |
78 | #endif | |
79 | } | |
80 | ||
f5e28eac JB |
81 | static inline int iwl_mvm_check_pn(struct iwl_mvm *mvm, struct sk_buff *skb, |
82 | int queue, struct ieee80211_sta *sta) | |
83 | { | |
84 | struct iwl_mvm_sta *mvmsta; | |
85 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
86 | struct ieee80211_rx_status *stats = IEEE80211_SKB_RXCB(skb); | |
87 | struct iwl_mvm_key_pn *ptk_pn; | |
88 | u8 tid, keyidx; | |
89 | u8 pn[IEEE80211_CCMP_PN_LEN]; | |
90 | u8 *extiv; | |
91 | ||
92 | /* do PN checking */ | |
93 | ||
94 | /* multicast and non-data only arrives on default queue */ | |
95 | if (!ieee80211_is_data(hdr->frame_control) || | |
96 | is_multicast_ether_addr(hdr->addr1)) | |
97 | return 0; | |
98 | ||
99 | /* do not check PN for open AP */ | |
100 | if (!(stats->flag & RX_FLAG_DECRYPTED)) | |
101 | return 0; | |
102 | ||
103 | /* | |
104 | * avoid checking for default queue - we don't want to replicate | |
105 | * all the logic that's necessary for checking the PN on fragmented | |
106 | * frames, leave that to mac80211 | |
107 | */ | |
108 | if (queue == 0) | |
109 | return 0; | |
110 | ||
111 | /* if we are here - this for sure is either CCMP or GCMP */ | |
112 | if (IS_ERR_OR_NULL(sta)) { | |
113 | IWL_ERR(mvm, | |
114 | "expected hw-decrypted unicast frame for station\n"); | |
115 | return -1; | |
116 | } | |
117 | ||
118 | mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
119 | ||
120 | extiv = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); | |
121 | keyidx = extiv[3] >> 6; | |
122 | ||
123 | ptk_pn = rcu_dereference(mvmsta->ptk_pn[keyidx]); | |
124 | if (!ptk_pn) | |
125 | return -1; | |
126 | ||
127 | if (ieee80211_is_data_qos(hdr->frame_control)) | |
128 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; | |
129 | else | |
130 | tid = 0; | |
131 | ||
132 | /* we don't use HCCA/802.11 QoS TSPECs, so drop such frames */ | |
133 | if (tid >= IWL_MAX_TID_COUNT) | |
134 | return -1; | |
135 | ||
136 | /* load pn */ | |
137 | pn[0] = extiv[7]; | |
138 | pn[1] = extiv[6]; | |
139 | pn[2] = extiv[5]; | |
140 | pn[3] = extiv[4]; | |
141 | pn[4] = extiv[1]; | |
142 | pn[5] = extiv[0]; | |
143 | ||
144 | if (memcmp(pn, ptk_pn->q[queue].pn[tid], | |
145 | IEEE80211_CCMP_PN_LEN) <= 0) | |
146 | return -1; | |
147 | ||
148 | memcpy(ptk_pn->q[queue].pn[tid], pn, IEEE80211_CCMP_PN_LEN); | |
149 | stats->flag |= RX_FLAG_PN_VALIDATED; | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | /* iwl_mvm_create_skb Adds the rxb to a new skb */ | |
155 | static void iwl_mvm_create_skb(struct sk_buff *skb, struct ieee80211_hdr *hdr, | |
156 | u16 len, u8 crypt_len, | |
157 | struct iwl_rx_cmd_buffer *rxb) | |
780e87c2 JB |
158 | { |
159 | unsigned int hdrlen, fraglen; | |
160 | ||
161 | /* If frame is small enough to fit in skb->head, pull it completely. | |
162 | * If not, only pull ieee80211_hdr (including crypto if present, and | |
163 | * an additional 8 bytes for SNAP/ethertype, see below) so that | |
164 | * splice() or TCP coalesce are more efficient. | |
165 | * | |
166 | * Since, in addition, ieee80211_data_to_8023() always pull in at | |
167 | * least 8 bytes (possibly more for mesh) we can do the same here | |
168 | * to save the cost of doing it later. That still doesn't pull in | |
169 | * the actual IP header since the typical case has a SNAP header. | |
170 | * If the latter changes (there are efforts in the standards group | |
171 | * to do so) we should revisit this and ieee80211_data_to_8023(). | |
172 | */ | |
173 | hdrlen = (len <= skb_tailroom(skb)) ? len : | |
174 | sizeof(*hdr) + crypt_len + 8; | |
175 | ||
176 | memcpy(skb_put(skb, hdrlen), hdr, hdrlen); | |
177 | fraglen = len - hdrlen; | |
178 | ||
179 | if (fraglen) { | |
180 | int offset = (void *)hdr + hdrlen - | |
181 | rxb_addr(rxb) + rxb_offset(rxb); | |
182 | ||
183 | skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, | |
184 | fraglen, rxb->truesize); | |
185 | } | |
f5e28eac | 186 | } |
780e87c2 | 187 | |
f5e28eac JB |
188 | /* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */ |
189 | static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, | |
190 | struct napi_struct *napi, | |
191 | struct sk_buff *skb, int queue, | |
192 | struct ieee80211_sta *sta) | |
193 | { | |
194 | if (iwl_mvm_check_pn(mvm, skb, queue, sta)) | |
195 | kfree_skb(skb); | |
196 | else | |
197 | ieee80211_rx_napi(mvm->hw, skb, napi); | |
780e87c2 JB |
198 | } |
199 | ||
200 | static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, | |
201 | struct iwl_rx_mpdu_desc *desc, | |
202 | struct ieee80211_rx_status *rx_status) | |
203 | { | |
d56a7801 | 204 | int energy_a, energy_b, max_energy; |
780e87c2 JB |
205 | |
206 | energy_a = desc->energy_a; | |
207 | energy_a = energy_a ? -energy_a : S8_MIN; | |
208 | energy_b = desc->energy_b; | |
209 | energy_b = energy_b ? -energy_b : S8_MIN; | |
780e87c2 | 210 | max_energy = max(energy_a, energy_b); |
780e87c2 | 211 | |
d56a7801 SS |
212 | IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n", |
213 | energy_a, energy_b, max_energy); | |
780e87c2 JB |
214 | |
215 | rx_status->signal = max_energy; | |
216 | rx_status->chains = 0; /* TODO: phy info */ | |
217 | rx_status->chain_signal[0] = energy_a; | |
218 | rx_status->chain_signal[1] = energy_b; | |
d56a7801 | 219 | rx_status->chain_signal[2] = S8_MIN; |
780e87c2 JB |
220 | } |
221 | ||
f5e28eac | 222 | static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr, |
780e87c2 JB |
223 | struct ieee80211_rx_status *stats, |
224 | struct iwl_rx_mpdu_desc *desc, int queue, | |
225 | u8 *crypt_len) | |
226 | { | |
227 | u16 status = le16_to_cpu(desc->status); | |
228 | ||
229 | if (!ieee80211_has_protected(hdr->frame_control) || | |
230 | (status & IWL_RX_MPDU_STATUS_SEC_MASK) == | |
231 | IWL_RX_MPDU_STATUS_SEC_NONE) | |
232 | return 0; | |
233 | ||
234 | /* TODO: handle packets encrypted with unknown alg */ | |
235 | ||
236 | switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) { | |
237 | case IWL_RX_MPDU_STATUS_SEC_CCM: | |
238 | case IWL_RX_MPDU_STATUS_SEC_GCM: | |
f5e28eac | 239 | BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN); |
780e87c2 JB |
240 | /* alg is CCM: check MIC only */ |
241 | if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) | |
242 | return -1; | |
243 | ||
244 | stats->flag |= RX_FLAG_DECRYPTED; | |
245 | *crypt_len = IEEE80211_CCMP_HDR_LEN; | |
246 | return 0; | |
247 | case IWL_RX_MPDU_STATUS_SEC_TKIP: | |
248 | /* Don't drop the frame and decrypt it in SW */ | |
249 | if (!(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK)) | |
250 | return 0; | |
251 | ||
252 | *crypt_len = IEEE80211_TKIP_IV_LEN; | |
253 | /* fall through if TTAK OK */ | |
254 | case IWL_RX_MPDU_STATUS_SEC_WEP: | |
255 | if (!(status & IWL_RX_MPDU_STATUS_ICV_OK)) | |
256 | return -1; | |
257 | ||
258 | stats->flag |= RX_FLAG_DECRYPTED; | |
259 | if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) == | |
260 | IWL_RX_MPDU_STATUS_SEC_WEP) | |
261 | *crypt_len = IEEE80211_WEP_IV_LEN; | |
262 | return 0; | |
263 | case IWL_RX_MPDU_STATUS_SEC_EXT_ENC: | |
264 | if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) | |
265 | return -1; | |
266 | stats->flag |= RX_FLAG_DECRYPTED; | |
267 | return 0; | |
268 | default: | |
269 | IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status); | |
270 | } | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
275 | static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, | |
276 | struct sk_buff *skb, | |
277 | struct iwl_rx_mpdu_desc *desc) | |
278 | { | |
279 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
280 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); | |
281 | ||
282 | if (mvmvif->features & NETIF_F_RXCSUM && | |
283 | desc->l3l4_flags & cpu_to_le16(IWL_RX_L3L4_IP_HDR_CSUM_OK) && | |
284 | desc->l3l4_flags & cpu_to_le16(IWL_RX_L3L4_TCP_UDP_CSUM_OK)) | |
285 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
286 | } | |
287 | ||
a571f5f6 SS |
288 | /* |
289 | * returns true if a packet outside BA session is a duplicate and | |
290 | * should be dropped | |
291 | */ | |
292 | static bool iwl_mvm_is_nonagg_dup(struct ieee80211_sta *sta, int queue, | |
293 | struct ieee80211_rx_status *rx_status, | |
294 | struct ieee80211_hdr *hdr, | |
295 | struct iwl_rx_mpdu_desc *desc) | |
296 | { | |
297 | struct iwl_mvm_sta *mvm_sta; | |
298 | struct iwl_mvm_rxq_dup_data *dup_data; | |
299 | u8 baid, tid, sub_frame_idx; | |
300 | ||
301 | if (WARN_ON(IS_ERR_OR_NULL(sta))) | |
302 | return false; | |
303 | ||
304 | baid = (le32_to_cpu(desc->reorder_data) & | |
305 | IWL_RX_MPDU_REORDER_BAID_MASK) >> | |
306 | IWL_RX_MPDU_REORDER_BAID_SHIFT; | |
307 | ||
308 | if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) | |
309 | return false; | |
310 | ||
311 | mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
312 | dup_data = &mvm_sta->dup_data[queue]; | |
313 | ||
314 | /* | |
315 | * Drop duplicate 802.11 retransmissions | |
316 | * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") | |
317 | */ | |
318 | if (ieee80211_is_ctl(hdr->frame_control) || | |
319 | ieee80211_is_qos_nullfunc(hdr->frame_control) || | |
320 | is_multicast_ether_addr(hdr->addr1)) { | |
321 | rx_status->flag |= RX_FLAG_DUP_VALIDATED; | |
322 | return false; | |
323 | } | |
324 | ||
325 | if (ieee80211_is_data_qos(hdr->frame_control)) | |
326 | /* frame has qos control */ | |
327 | tid = *ieee80211_get_qos_ctl(hdr) & | |
328 | IEEE80211_QOS_CTL_TID_MASK; | |
329 | else | |
330 | tid = IWL_MAX_TID_COUNT; | |
331 | ||
332 | /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */ | |
333 | sub_frame_idx = desc->amsdu_info & IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; | |
334 | ||
335 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && | |
336 | dup_data->last_seq[tid] == hdr->seq_ctrl && | |
337 | dup_data->last_sub_frame[tid] >= sub_frame_idx)) | |
338 | return true; | |
339 | ||
340 | dup_data->last_seq[tid] = hdr->seq_ctrl; | |
341 | dup_data->last_sub_frame[tid] = sub_frame_idx; | |
342 | ||
343 | rx_status->flag |= RX_FLAG_DUP_VALIDATED; | |
344 | ||
345 | return false; | |
346 | } | |
347 | ||
94bb4481 SS |
348 | int iwl_mvm_notify_rx_queue(struct iwl_mvm *mvm, u32 rxq_mask, |
349 | const u8 *data, u32 count) | |
350 | { | |
351 | struct iwl_rxq_sync_cmd *cmd; | |
352 | u32 data_size = sizeof(*cmd) + count; | |
353 | int ret; | |
354 | ||
355 | /* should be DWORD aligned */ | |
356 | if (WARN_ON(count & 3 || count > IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE)) | |
357 | return -EINVAL; | |
358 | ||
359 | cmd = kzalloc(data_size, GFP_KERNEL); | |
360 | if (!cmd) | |
361 | return -ENOMEM; | |
362 | ||
363 | cmd->rxq_mask = cpu_to_le32(rxq_mask); | |
364 | cmd->count = cpu_to_le32(count); | |
365 | cmd->flags = 0; | |
366 | memcpy(cmd->payload, data, count); | |
367 | ||
368 | ret = iwl_mvm_send_cmd_pdu(mvm, | |
369 | WIDE_ID(DATA_PATH_GROUP, | |
370 | TRIGGER_RX_QUEUES_NOTIF_CMD), | |
371 | 0, data_size, cmd); | |
372 | ||
373 | kfree(cmd); | |
374 | return ret; | |
375 | } | |
376 | ||
377 | void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, | |
378 | int queue) | |
379 | { | |
380 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
381 | struct iwl_rxq_sync_notification *notif; | |
382 | struct iwl_mvm_internal_rxq_notif *internal_notif; | |
383 | ||
384 | notif = (void *)pkt->data; | |
385 | internal_notif = (void *)notif->payload; | |
386 | ||
387 | switch (internal_notif->type) { | |
388 | case IWL_MVM_RXQ_NOTIF_DEL_BA: | |
389 | /* TODO */ | |
390 | break; | |
391 | default: | |
392 | WARN_ONCE(1, "Invalid identifier %d", internal_notif->type); | |
393 | } | |
394 | } | |
395 | ||
780e87c2 JB |
396 | void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, |
397 | struct iwl_rx_cmd_buffer *rxb, int queue) | |
398 | { | |
399 | struct ieee80211_rx_status *rx_status; | |
400 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
401 | struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; | |
0c1c6e37 | 402 | struct ieee80211_hdr *hdr = (void *)(pkt->data + sizeof(*desc)); |
780e87c2 JB |
403 | u32 len = le16_to_cpu(desc->mpdu_len); |
404 | u32 rate_n_flags = le32_to_cpu(desc->rate_n_flags); | |
405 | struct ieee80211_sta *sta = NULL; | |
406 | struct sk_buff *skb; | |
780e87c2 JB |
407 | u8 crypt_len = 0; |
408 | ||
409 | /* Dont use dev_alloc_skb(), we'll have enough headroom once | |
410 | * ieee80211_hdr pulled. | |
411 | */ | |
412 | skb = alloc_skb(128, GFP_ATOMIC); | |
413 | if (!skb) { | |
414 | IWL_ERR(mvm, "alloc_skb failed\n"); | |
415 | return; | |
416 | } | |
417 | ||
418 | rx_status = IEEE80211_SKB_RXCB(skb); | |
419 | ||
420 | if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, desc, queue, &crypt_len)) { | |
421 | kfree_skb(skb); | |
422 | return; | |
423 | } | |
424 | ||
425 | /* | |
426 | * Keep packets with CRC errors (and with overrun) for monitor mode | |
427 | * (otherwise the firmware discards them) but mark them as bad. | |
428 | */ | |
429 | if (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) || | |
430 | !(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) { | |
431 | IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", | |
432 | le16_to_cpu(desc->status)); | |
433 | rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; | |
434 | } | |
435 | ||
436 | rx_status->mactime = le64_to_cpu(desc->tsf_on_air_rise); | |
437 | rx_status->device_timestamp = le32_to_cpu(desc->gp2_on_air_rise); | |
438 | rx_status->band = desc->channel > 14 ? IEEE80211_BAND_5GHZ : | |
439 | IEEE80211_BAND_2GHZ; | |
440 | rx_status->freq = ieee80211_channel_to_frequency(desc->channel, | |
441 | rx_status->band); | |
442 | iwl_mvm_get_signal_strength(mvm, desc, rx_status); | |
77fe7395 SS |
443 | /* TSF as indicated by the firmware is at INA time */ |
444 | rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; | |
780e87c2 JB |
445 | |
446 | rcu_read_lock(); | |
447 | ||
448 | if (le16_to_cpu(desc->status) & IWL_RX_MPDU_STATUS_SRC_STA_FOUND) { | |
449 | u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK; | |
450 | ||
451 | if (!WARN_ON_ONCE(id >= IWL_MVM_STATION_COUNT)) { | |
452 | sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); | |
453 | if (IS_ERR(sta)) | |
454 | sta = NULL; | |
455 | } | |
456 | } else if (!is_multicast_ether_addr(hdr->addr2)) { | |
457 | /* | |
458 | * This is fine since we prevent two stations with the same | |
459 | * address from being added. | |
460 | */ | |
461 | sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); | |
462 | } | |
463 | ||
464 | if (sta) { | |
465 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
466 | ||
467 | /* | |
468 | * We have tx blocked stations (with CS bit). If we heard | |
469 | * frames from a blocked station on a new channel we can | |
470 | * TX to it again. | |
471 | */ | |
472 | if (unlikely(mvm->csa_tx_block_bcn_timeout)) | |
473 | iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false); | |
474 | ||
475 | rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status); | |
476 | ||
477 | if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) && | |
478 | ieee80211_is_beacon(hdr->frame_control)) { | |
479 | struct iwl_fw_dbg_trigger_tlv *trig; | |
480 | struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; | |
481 | bool trig_check; | |
482 | s32 rssi; | |
483 | ||
484 | trig = iwl_fw_dbg_get_trigger(mvm->fw, | |
485 | FW_DBG_TRIGGER_RSSI); | |
486 | rssi_trig = (void *)trig->data; | |
487 | rssi = le32_to_cpu(rssi_trig->rssi); | |
488 | ||
489 | trig_check = | |
490 | iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif, | |
491 | trig); | |
492 | if (trig_check && rx_status->signal < rssi) | |
493 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL); | |
494 | } | |
495 | ||
496 | /* TODO: multi queue TCM */ | |
497 | ||
498 | if (ieee80211_is_data(hdr->frame_control)) | |
499 | iwl_mvm_rx_csum(sta, skb, desc); | |
a571f5f6 SS |
500 | |
501 | if (iwl_mvm_is_nonagg_dup(sta, queue, rx_status, hdr, desc)) { | |
502 | kfree_skb(skb); | |
503 | rcu_read_unlock(); | |
504 | return; | |
505 | } | |
780e87c2 JB |
506 | } |
507 | ||
780e87c2 JB |
508 | /* |
509 | * TODO: PHY info. | |
510 | * Verify we don't have the information in the MPDU descriptor and | |
511 | * that it is not needed. | |
512 | * Make sure for monitor mode that we are on default queue, update | |
513 | * ampdu_ref and the rest of phy info then | |
514 | */ | |
515 | ||
516 | /* Set up the HT phy flags */ | |
517 | switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { | |
518 | case RATE_MCS_CHAN_WIDTH_20: | |
519 | break; | |
520 | case RATE_MCS_CHAN_WIDTH_40: | |
521 | rx_status->flag |= RX_FLAG_40MHZ; | |
522 | break; | |
523 | case RATE_MCS_CHAN_WIDTH_80: | |
524 | rx_status->vht_flag |= RX_VHT_FLAG_80MHZ; | |
525 | break; | |
526 | case RATE_MCS_CHAN_WIDTH_160: | |
527 | rx_status->vht_flag |= RX_VHT_FLAG_160MHZ; | |
528 | break; | |
529 | } | |
530 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
531 | rx_status->flag |= RX_FLAG_SHORT_GI; | |
532 | if (rate_n_flags & RATE_HT_MCS_GF_MSK) | |
533 | rx_status->flag |= RX_FLAG_HT_GF; | |
534 | if (rate_n_flags & RATE_MCS_LDPC_MSK) | |
535 | rx_status->flag |= RX_FLAG_LDPC; | |
536 | if (rate_n_flags & RATE_MCS_HT_MSK) { | |
537 | u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >> | |
538 | RATE_MCS_STBC_POS; | |
539 | rx_status->flag |= RX_FLAG_HT; | |
540 | rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; | |
541 | rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT; | |
542 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { | |
543 | u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >> | |
544 | RATE_MCS_STBC_POS; | |
545 | rx_status->vht_nss = | |
546 | ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> | |
547 | RATE_VHT_MCS_NSS_POS) + 1; | |
548 | rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; | |
549 | rx_status->flag |= RX_FLAG_VHT; | |
550 | rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT; | |
551 | if (rate_n_flags & RATE_MCS_BF_MSK) | |
552 | rx_status->vht_flag |= RX_VHT_FLAG_BF; | |
553 | } else { | |
554 | rx_status->rate_idx = | |
555 | iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, | |
556 | rx_status->band); | |
557 | } | |
558 | ||
559 | /* TODO: PHY info - update ampdu queue statistics (for debugfs) */ | |
560 | /* TODO: PHY info - gscan */ | |
561 | ||
f5e28eac JB |
562 | iwl_mvm_create_skb(skb, hdr, len, crypt_len, rxb); |
563 | iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, sta); | |
564 | rcu_read_unlock(); | |
780e87c2 | 565 | } |
585a6fcc SS |
566 | |
567 | void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, | |
568 | struct iwl_rx_cmd_buffer *rxb, int queue) | |
569 | { | |
570 | /* TODO */ | |
571 | } |