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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 | |
e29cc6b9 | 10 | * Copyright(c) 2015 - 2016 Intel Deutschland GmbH |
780e87c2 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 | * 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 | |
e29cc6b9 | 32 | * Copyright(c) 2015 - 2016 Intel Deutschland GmbH |
780e87c2 JB |
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 | 158 | { |
e29cc6b9 SS |
159 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
160 | struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; | |
161 | unsigned int headlen, fraglen, pad_len = 0; | |
162 | unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
163 | ||
164 | if (desc->mac_flags2 & IWL_RX_MPDU_MFLG2_PAD) | |
165 | pad_len = 2; | |
166 | len -= pad_len; | |
780e87c2 JB |
167 | |
168 | /* If frame is small enough to fit in skb->head, pull it completely. | |
169 | * If not, only pull ieee80211_hdr (including crypto if present, and | |
170 | * an additional 8 bytes for SNAP/ethertype, see below) so that | |
171 | * splice() or TCP coalesce are more efficient. | |
172 | * | |
173 | * Since, in addition, ieee80211_data_to_8023() always pull in at | |
174 | * least 8 bytes (possibly more for mesh) we can do the same here | |
175 | * to save the cost of doing it later. That still doesn't pull in | |
176 | * the actual IP header since the typical case has a SNAP header. | |
177 | * If the latter changes (there are efforts in the standards group | |
178 | * to do so) we should revisit this and ieee80211_data_to_8023(). | |
179 | */ | |
e29cc6b9 SS |
180 | headlen = (len <= skb_tailroom(skb)) ? len : |
181 | hdrlen + crypt_len + 8; | |
780e87c2 | 182 | |
e29cc6b9 SS |
183 | /* The firmware may align the packet to DWORD. |
184 | * The padding is inserted after the IV. | |
185 | * After copying the header + IV skip the padding if | |
186 | * present before copying packet data. | |
187 | */ | |
188 | hdrlen += crypt_len; | |
780e87c2 | 189 | memcpy(skb_put(skb, hdrlen), hdr, hdrlen); |
e29cc6b9 SS |
190 | memcpy(skb_put(skb, headlen - hdrlen), (u8 *)hdr + hdrlen + pad_len, |
191 | headlen - hdrlen); | |
192 | ||
193 | fraglen = len - headlen; | |
780e87c2 JB |
194 | |
195 | if (fraglen) { | |
e29cc6b9 | 196 | int offset = (void *)hdr + headlen + pad_len - |
780e87c2 JB |
197 | rxb_addr(rxb) + rxb_offset(rxb); |
198 | ||
199 | skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, | |
200 | fraglen, rxb->truesize); | |
201 | } | |
f5e28eac | 202 | } |
780e87c2 | 203 | |
f5e28eac JB |
204 | /* iwl_mvm_pass_packet_to_mac80211 - passes the packet for mac80211 */ |
205 | static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, | |
206 | struct napi_struct *napi, | |
207 | struct sk_buff *skb, int queue, | |
208 | struct ieee80211_sta *sta) | |
209 | { | |
210 | if (iwl_mvm_check_pn(mvm, skb, queue, sta)) | |
211 | kfree_skb(skb); | |
212 | else | |
d63b548f | 213 | ieee80211_rx_napi(mvm->hw, NULL, skb, napi); |
780e87c2 JB |
214 | } |
215 | ||
216 | static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, | |
217 | struct iwl_rx_mpdu_desc *desc, | |
218 | struct ieee80211_rx_status *rx_status) | |
219 | { | |
d56a7801 | 220 | int energy_a, energy_b, max_energy; |
780e87c2 JB |
221 | |
222 | energy_a = desc->energy_a; | |
223 | energy_a = energy_a ? -energy_a : S8_MIN; | |
224 | energy_b = desc->energy_b; | |
225 | energy_b = energy_b ? -energy_b : S8_MIN; | |
780e87c2 | 226 | max_energy = max(energy_a, energy_b); |
780e87c2 | 227 | |
d56a7801 SS |
228 | IWL_DEBUG_STATS(mvm, "energy In A %d B %d, and max %d\n", |
229 | energy_a, energy_b, max_energy); | |
780e87c2 JB |
230 | |
231 | rx_status->signal = max_energy; | |
232 | rx_status->chains = 0; /* TODO: phy info */ | |
233 | rx_status->chain_signal[0] = energy_a; | |
234 | rx_status->chain_signal[1] = energy_b; | |
d56a7801 | 235 | rx_status->chain_signal[2] = S8_MIN; |
780e87c2 JB |
236 | } |
237 | ||
f5e28eac | 238 | static int iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr, |
780e87c2 JB |
239 | struct ieee80211_rx_status *stats, |
240 | struct iwl_rx_mpdu_desc *desc, int queue, | |
241 | u8 *crypt_len) | |
242 | { | |
243 | u16 status = le16_to_cpu(desc->status); | |
244 | ||
245 | if (!ieee80211_has_protected(hdr->frame_control) || | |
246 | (status & IWL_RX_MPDU_STATUS_SEC_MASK) == | |
247 | IWL_RX_MPDU_STATUS_SEC_NONE) | |
248 | return 0; | |
249 | ||
250 | /* TODO: handle packets encrypted with unknown alg */ | |
251 | ||
252 | switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) { | |
253 | case IWL_RX_MPDU_STATUS_SEC_CCM: | |
254 | case IWL_RX_MPDU_STATUS_SEC_GCM: | |
f5e28eac | 255 | BUILD_BUG_ON(IEEE80211_CCMP_PN_LEN != IEEE80211_GCMP_PN_LEN); |
780e87c2 JB |
256 | /* alg is CCM: check MIC only */ |
257 | if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) | |
258 | return -1; | |
259 | ||
260 | stats->flag |= RX_FLAG_DECRYPTED; | |
261 | *crypt_len = IEEE80211_CCMP_HDR_LEN; | |
262 | return 0; | |
263 | case IWL_RX_MPDU_STATUS_SEC_TKIP: | |
264 | /* Don't drop the frame and decrypt it in SW */ | |
265 | if (!(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK)) | |
266 | return 0; | |
267 | ||
268 | *crypt_len = IEEE80211_TKIP_IV_LEN; | |
269 | /* fall through if TTAK OK */ | |
270 | case IWL_RX_MPDU_STATUS_SEC_WEP: | |
271 | if (!(status & IWL_RX_MPDU_STATUS_ICV_OK)) | |
272 | return -1; | |
273 | ||
274 | stats->flag |= RX_FLAG_DECRYPTED; | |
275 | if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) == | |
276 | IWL_RX_MPDU_STATUS_SEC_WEP) | |
277 | *crypt_len = IEEE80211_WEP_IV_LEN; | |
278 | return 0; | |
279 | case IWL_RX_MPDU_STATUS_SEC_EXT_ENC: | |
280 | if (!(status & IWL_RX_MPDU_STATUS_MIC_OK)) | |
281 | return -1; | |
282 | stats->flag |= RX_FLAG_DECRYPTED; | |
283 | return 0; | |
284 | default: | |
285 | IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status); | |
286 | } | |
287 | ||
288 | return 0; | |
289 | } | |
290 | ||
291 | static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, | |
292 | struct sk_buff *skb, | |
293 | struct iwl_rx_mpdu_desc *desc) | |
294 | { | |
295 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
296 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); | |
b238be07 SS |
297 | u16 flags = le16_to_cpu(desc->l3l4_flags); |
298 | u8 l3_prot = (u8)((flags & IWL_RX_L3L4_L3_PROTO_MASK) >> | |
299 | IWL_RX_L3_PROTO_POS); | |
780e87c2 JB |
300 | |
301 | if (mvmvif->features & NETIF_F_RXCSUM && | |
b238be07 SS |
302 | flags & IWL_RX_L3L4_TCP_UDP_CSUM_OK && |
303 | (flags & IWL_RX_L3L4_IP_HDR_CSUM_OK || | |
304 | l3_prot == IWL_RX_L3_TYPE_IPV6 || | |
305 | l3_prot == IWL_RX_L3_TYPE_IPV6_FRAG)) | |
780e87c2 JB |
306 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
307 | } | |
308 | ||
a571f5f6 SS |
309 | /* |
310 | * returns true if a packet outside BA session is a duplicate and | |
311 | * should be dropped | |
312 | */ | |
313 | static bool iwl_mvm_is_nonagg_dup(struct ieee80211_sta *sta, int queue, | |
314 | struct ieee80211_rx_status *rx_status, | |
315 | struct ieee80211_hdr *hdr, | |
316 | struct iwl_rx_mpdu_desc *desc) | |
317 | { | |
318 | struct iwl_mvm_sta *mvm_sta; | |
319 | struct iwl_mvm_rxq_dup_data *dup_data; | |
320 | u8 baid, tid, sub_frame_idx; | |
321 | ||
322 | if (WARN_ON(IS_ERR_OR_NULL(sta))) | |
323 | return false; | |
324 | ||
325 | baid = (le32_to_cpu(desc->reorder_data) & | |
326 | IWL_RX_MPDU_REORDER_BAID_MASK) >> | |
327 | IWL_RX_MPDU_REORDER_BAID_SHIFT; | |
328 | ||
329 | if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) | |
330 | return false; | |
331 | ||
332 | mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
333 | dup_data = &mvm_sta->dup_data[queue]; | |
334 | ||
335 | /* | |
336 | * Drop duplicate 802.11 retransmissions | |
337 | * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") | |
338 | */ | |
339 | if (ieee80211_is_ctl(hdr->frame_control) || | |
340 | ieee80211_is_qos_nullfunc(hdr->frame_control) || | |
341 | is_multicast_ether_addr(hdr->addr1)) { | |
342 | rx_status->flag |= RX_FLAG_DUP_VALIDATED; | |
343 | return false; | |
344 | } | |
345 | ||
346 | if (ieee80211_is_data_qos(hdr->frame_control)) | |
347 | /* frame has qos control */ | |
348 | tid = *ieee80211_get_qos_ctl(hdr) & | |
349 | IEEE80211_QOS_CTL_TID_MASK; | |
350 | else | |
351 | tid = IWL_MAX_TID_COUNT; | |
352 | ||
353 | /* If this wasn't a part of an A-MSDU the sub-frame index will be 0 */ | |
354 | sub_frame_idx = desc->amsdu_info & IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK; | |
355 | ||
356 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && | |
357 | dup_data->last_seq[tid] == hdr->seq_ctrl && | |
358 | dup_data->last_sub_frame[tid] >= sub_frame_idx)) | |
359 | return true; | |
360 | ||
361 | dup_data->last_seq[tid] = hdr->seq_ctrl; | |
362 | dup_data->last_sub_frame[tid] = sub_frame_idx; | |
363 | ||
364 | rx_status->flag |= RX_FLAG_DUP_VALIDATED; | |
365 | ||
366 | return false; | |
367 | } | |
368 | ||
94bb4481 SS |
369 | int iwl_mvm_notify_rx_queue(struct iwl_mvm *mvm, u32 rxq_mask, |
370 | const u8 *data, u32 count) | |
371 | { | |
372 | struct iwl_rxq_sync_cmd *cmd; | |
373 | u32 data_size = sizeof(*cmd) + count; | |
374 | int ret; | |
375 | ||
376 | /* should be DWORD aligned */ | |
377 | if (WARN_ON(count & 3 || count > IWL_MULTI_QUEUE_SYNC_MSG_MAX_SIZE)) | |
378 | return -EINVAL; | |
379 | ||
380 | cmd = kzalloc(data_size, GFP_KERNEL); | |
381 | if (!cmd) | |
382 | return -ENOMEM; | |
383 | ||
384 | cmd->rxq_mask = cpu_to_le32(rxq_mask); | |
385 | cmd->count = cpu_to_le32(count); | |
386 | cmd->flags = 0; | |
387 | memcpy(cmd->payload, data, count); | |
388 | ||
389 | ret = iwl_mvm_send_cmd_pdu(mvm, | |
390 | WIDE_ID(DATA_PATH_GROUP, | |
391 | TRIGGER_RX_QUEUES_NOTIF_CMD), | |
392 | 0, data_size, cmd); | |
393 | ||
394 | kfree(cmd); | |
395 | return ret; | |
396 | } | |
397 | ||
398 | void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, | |
399 | int queue) | |
400 | { | |
401 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
402 | struct iwl_rxq_sync_notification *notif; | |
403 | struct iwl_mvm_internal_rxq_notif *internal_notif; | |
404 | ||
405 | notif = (void *)pkt->data; | |
406 | internal_notif = (void *)notif->payload; | |
407 | ||
408 | switch (internal_notif->type) { | |
409 | case IWL_MVM_RXQ_NOTIF_DEL_BA: | |
410 | /* TODO */ | |
411 | break; | |
412 | default: | |
413 | WARN_ONCE(1, "Invalid identifier %d", internal_notif->type); | |
414 | } | |
415 | } | |
416 | ||
780e87c2 JB |
417 | void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, |
418 | struct iwl_rx_cmd_buffer *rxb, int queue) | |
419 | { | |
420 | struct ieee80211_rx_status *rx_status; | |
421 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
422 | struct iwl_rx_mpdu_desc *desc = (void *)pkt->data; | |
0c1c6e37 | 423 | struct ieee80211_hdr *hdr = (void *)(pkt->data + sizeof(*desc)); |
780e87c2 JB |
424 | u32 len = le16_to_cpu(desc->mpdu_len); |
425 | u32 rate_n_flags = le32_to_cpu(desc->rate_n_flags); | |
426 | struct ieee80211_sta *sta = NULL; | |
427 | struct sk_buff *skb; | |
780e87c2 JB |
428 | u8 crypt_len = 0; |
429 | ||
430 | /* Dont use dev_alloc_skb(), we'll have enough headroom once | |
431 | * ieee80211_hdr pulled. | |
432 | */ | |
433 | skb = alloc_skb(128, GFP_ATOMIC); | |
434 | if (!skb) { | |
435 | IWL_ERR(mvm, "alloc_skb failed\n"); | |
436 | return; | |
437 | } | |
438 | ||
439 | rx_status = IEEE80211_SKB_RXCB(skb); | |
440 | ||
441 | if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, desc, queue, &crypt_len)) { | |
442 | kfree_skb(skb); | |
443 | return; | |
444 | } | |
445 | ||
446 | /* | |
447 | * Keep packets with CRC errors (and with overrun) for monitor mode | |
448 | * (otherwise the firmware discards them) but mark them as bad. | |
449 | */ | |
450 | if (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) || | |
451 | !(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) { | |
452 | IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", | |
453 | le16_to_cpu(desc->status)); | |
454 | rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; | |
455 | } | |
456 | ||
457 | rx_status->mactime = le64_to_cpu(desc->tsf_on_air_rise); | |
458 | rx_status->device_timestamp = le32_to_cpu(desc->gp2_on_air_rise); | |
57fbcce3 JB |
459 | rx_status->band = desc->channel > 14 ? NL80211_BAND_5GHZ : |
460 | NL80211_BAND_2GHZ; | |
780e87c2 JB |
461 | rx_status->freq = ieee80211_channel_to_frequency(desc->channel, |
462 | rx_status->band); | |
463 | iwl_mvm_get_signal_strength(mvm, desc, rx_status); | |
77fe7395 SS |
464 | /* TSF as indicated by the firmware is at INA time */ |
465 | rx_status->flag |= RX_FLAG_MACTIME_PLCP_START; | |
780e87c2 JB |
466 | |
467 | rcu_read_lock(); | |
468 | ||
469 | if (le16_to_cpu(desc->status) & IWL_RX_MPDU_STATUS_SRC_STA_FOUND) { | |
470 | u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK; | |
471 | ||
472 | if (!WARN_ON_ONCE(id >= IWL_MVM_STATION_COUNT)) { | |
473 | sta = rcu_dereference(mvm->fw_id_to_mac_id[id]); | |
474 | if (IS_ERR(sta)) | |
475 | sta = NULL; | |
476 | } | |
477 | } else if (!is_multicast_ether_addr(hdr->addr2)) { | |
478 | /* | |
479 | * This is fine since we prevent two stations with the same | |
480 | * address from being added. | |
481 | */ | |
482 | sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL); | |
483 | } | |
484 | ||
485 | if (sta) { | |
486 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
487 | ||
488 | /* | |
489 | * We have tx blocked stations (with CS bit). If we heard | |
490 | * frames from a blocked station on a new channel we can | |
491 | * TX to it again. | |
492 | */ | |
493 | if (unlikely(mvm->csa_tx_block_bcn_timeout)) | |
494 | iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false); | |
495 | ||
496 | rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status); | |
497 | ||
498 | if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) && | |
499 | ieee80211_is_beacon(hdr->frame_control)) { | |
500 | struct iwl_fw_dbg_trigger_tlv *trig; | |
501 | struct iwl_fw_dbg_trigger_low_rssi *rssi_trig; | |
502 | bool trig_check; | |
503 | s32 rssi; | |
504 | ||
505 | trig = iwl_fw_dbg_get_trigger(mvm->fw, | |
506 | FW_DBG_TRIGGER_RSSI); | |
507 | rssi_trig = (void *)trig->data; | |
508 | rssi = le32_to_cpu(rssi_trig->rssi); | |
509 | ||
510 | trig_check = | |
511 | iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif, | |
512 | trig); | |
513 | if (trig_check && rx_status->signal < rssi) | |
514 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL); | |
515 | } | |
516 | ||
517 | /* TODO: multi queue TCM */ | |
518 | ||
519 | if (ieee80211_is_data(hdr->frame_control)) | |
520 | iwl_mvm_rx_csum(sta, skb, desc); | |
a571f5f6 SS |
521 | |
522 | if (iwl_mvm_is_nonagg_dup(sta, queue, rx_status, hdr, desc)) { | |
523 | kfree_skb(skb); | |
524 | rcu_read_unlock(); | |
525 | return; | |
526 | } | |
62d23403 SS |
527 | |
528 | /* | |
529 | * Our hardware de-aggregates AMSDUs but copies the mac header | |
530 | * as it to the de-aggregated MPDUs. We need to turn off the | |
531 | * AMSDU bit in the QoS control ourselves. | |
532 | */ | |
533 | if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) && | |
534 | !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) { | |
535 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
536 | ||
537 | *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; | |
538 | } | |
780e87c2 JB |
539 | } |
540 | ||
780e87c2 JB |
541 | /* |
542 | * TODO: PHY info. | |
543 | * Verify we don't have the information in the MPDU descriptor and | |
544 | * that it is not needed. | |
545 | * Make sure for monitor mode that we are on default queue, update | |
546 | * ampdu_ref and the rest of phy info then | |
547 | */ | |
548 | ||
549 | /* Set up the HT phy flags */ | |
550 | switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { | |
551 | case RATE_MCS_CHAN_WIDTH_20: | |
552 | break; | |
553 | case RATE_MCS_CHAN_WIDTH_40: | |
554 | rx_status->flag |= RX_FLAG_40MHZ; | |
555 | break; | |
556 | case RATE_MCS_CHAN_WIDTH_80: | |
557 | rx_status->vht_flag |= RX_VHT_FLAG_80MHZ; | |
558 | break; | |
559 | case RATE_MCS_CHAN_WIDTH_160: | |
560 | rx_status->vht_flag |= RX_VHT_FLAG_160MHZ; | |
561 | break; | |
562 | } | |
563 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
564 | rx_status->flag |= RX_FLAG_SHORT_GI; | |
565 | if (rate_n_flags & RATE_HT_MCS_GF_MSK) | |
566 | rx_status->flag |= RX_FLAG_HT_GF; | |
567 | if (rate_n_flags & RATE_MCS_LDPC_MSK) | |
568 | rx_status->flag |= RX_FLAG_LDPC; | |
569 | if (rate_n_flags & RATE_MCS_HT_MSK) { | |
570 | u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >> | |
571 | RATE_MCS_STBC_POS; | |
572 | rx_status->flag |= RX_FLAG_HT; | |
573 | rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; | |
574 | rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT; | |
575 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { | |
576 | u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >> | |
577 | RATE_MCS_STBC_POS; | |
578 | rx_status->vht_nss = | |
579 | ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> | |
580 | RATE_VHT_MCS_NSS_POS) + 1; | |
581 | rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; | |
582 | rx_status->flag |= RX_FLAG_VHT; | |
583 | rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT; | |
584 | if (rate_n_flags & RATE_MCS_BF_MSK) | |
585 | rx_status->vht_flag |= RX_VHT_FLAG_BF; | |
586 | } else { | |
587 | rx_status->rate_idx = | |
588 | iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, | |
589 | rx_status->band); | |
590 | } | |
591 | ||
592 | /* TODO: PHY info - update ampdu queue statistics (for debugfs) */ | |
593 | /* TODO: PHY info - gscan */ | |
594 | ||
f5e28eac JB |
595 | iwl_mvm_create_skb(skb, hdr, len, crypt_len, rxb); |
596 | iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, sta); | |
597 | rcu_read_unlock(); | |
780e87c2 | 598 | } |
585a6fcc SS |
599 | |
600 | void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, | |
601 | struct iwl_rx_cmd_buffer *rxb, int queue) | |
602 | { | |
603 | /* TODO */ | |
604 | } |