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Merge branches 'acpi-ec', 'acpi-video', 'acpi-button' and 'acpi-thermal'
[linux-2.6-block.git] / drivers / net / wireless / intel / iwlwifi / mvm / rxmq.c
CommitLineData
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
68void 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		 81static 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 */
155static 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 */
205static 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
43ec72b7 213 ieee80211_rx_napi(mvm->hw, sta, skb, napi);
780e87c2
JB		 214}
215
216static 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 238static 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
291static 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 */
313static 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		 369int 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
74dd1764
SS		 398/*
399 * Returns true if sn2 - buffer_size < sn1 < sn2.
400 * To be used only in order to compare reorder buffer head with NSSN.
401 * We fully trust NSSN unless it is behind us due to reorder timeout.
402 * Reorder timeout can only bring us up to buffer_size SNs ahead of NSSN.
403 */
404static bool iwl_mvm_is_sn_less(u16 sn1, u16 sn2, u16 buffer_size)
405{
406 return ieee80211_sn_less(sn1, sn2) &&
407 !ieee80211_sn_less(sn1, sn2 - buffer_size);
408}
409
0690405f
SS		 410#define RX_REORDER_BUF_TIMEOUT_MQ (HZ / 10)
411
b915c101
SS		 412static void iwl_mvm_release_frames(struct iwl_mvm *mvm,
413 struct ieee80211_sta *sta,
414 struct napi_struct *napi,
415 struct iwl_mvm_reorder_buffer *reorder_buf,
416 u16 nssn)
417{
418 u16 ssn = reorder_buf->head_sn;
419
0690405f
SS		 420 lockdep_assert_held(&reorder_buf->lock);
421
422 /* ignore nssn smaller than head sn - this can happen due to timeout */
74dd1764 423 if (iwl_mvm_is_sn_less(nssn, ssn, reorder_buf->buf_size))
0690405f
SS		 424 return;
425
74dd1764 426 while (iwl_mvm_is_sn_less(ssn, nssn, reorder_buf->buf_size)) {
b915c101
SS		 427 int index = ssn % reorder_buf->buf_size;
428 struct sk_buff_head *skb_list = &reorder_buf->entries[index];
429 struct sk_buff *skb;
430
431 ssn = ieee80211_sn_inc(ssn);
432
433 /* holes are valid since nssn indicates frames were received. */
434 if (skb_queue_empty(skb_list) || !skb_peek_tail(skb_list))
435 continue;
436 /* Empty the list. Will have more than one frame for A-MSDU */
437 while ((skb = __skb_dequeue(skb_list))) {
438 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb,
439 reorder_buf->queue,
440 sta);
441 reorder_buf->num_stored--;
442 }
443 }
444 reorder_buf->head_sn = nssn;
0690405f
SS		 445
446 if (reorder_buf->num_stored && !reorder_buf->removed) {
447 u16 index = reorder_buf->head_sn % reorder_buf->buf_size;
448
449 while (!skb_peek_tail(&reorder_buf->entries[index]))
450 index = (index + 1) % reorder_buf->buf_size;
451 /* modify timer to match next frame's expiration time */
452 mod_timer(&reorder_buf->reorder_timer,
453 reorder_buf->reorder_time[index] + 1 +
454 RX_REORDER_BUF_TIMEOUT_MQ);
455 } else {
456 del_timer(&reorder_buf->reorder_timer);
457 }
458}
459
460void iwl_mvm_reorder_timer_expired(unsigned long data)
461{
462 struct iwl_mvm_reorder_buffer *buf = (void *)data;
463 int i;
464 u16 sn = 0, index = 0;
465 bool expired = false;
466
467 spin_lock_bh(&buf->lock);
468
469 if (!buf->num_stored || buf->removed) {
470 spin_unlock_bh(&buf->lock);
471 return;
472 }
473
474 for (i = 0; i < buf->buf_size ; i++) {
475 index = (buf->head_sn + i) % buf->buf_size;
476
477 if (!skb_peek_tail(&buf->entries[index]))
478 continue;
479 if (!time_after(jiffies, buf->reorder_time[index] +
480 RX_REORDER_BUF_TIMEOUT_MQ))
481 break;
482 expired = true;
483 sn = ieee80211_sn_add(buf->head_sn, i + 1);
484 }
485
486 if (expired) {
487 struct ieee80211_sta *sta;
488
489 rcu_read_lock();
490 sta = rcu_dereference(buf->mvm->fw_id_to_mac_id[buf->sta_id]);
491 /* SN is set to the last expired frame + 1 */
492 iwl_mvm_release_frames(buf->mvm, sta, NULL, buf, sn);
493 rcu_read_unlock();
494 } else if (buf->num_stored) {
495 /*
496 * If no frame expired and there are stored frames, index is now
497 * pointing to the first unexpired frame - modify timer
498 * accordingly to this frame.
499 */
500 mod_timer(&buf->reorder_timer,
501 buf->reorder_time[index] +
502 1 + RX_REORDER_BUF_TIMEOUT_MQ);
503 }
504 spin_unlock_bh(&buf->lock);
b915c101
SS		 505}
506
507static void iwl_mvm_del_ba(struct iwl_mvm *mvm, int queue,
508 struct iwl_mvm_delba_data *data)
509{
510 struct iwl_mvm_baid_data *ba_data;
511 struct ieee80211_sta *sta;
512 struct iwl_mvm_reorder_buffer *reorder_buf;
513 u8 baid = data->baid;
514
515 if (WARN_ON_ONCE(baid >= IWL_RX_REORDER_DATA_INVALID_BAID))
516 return;
517
518 rcu_read_lock();
519
520 ba_data = rcu_dereference(mvm->baid_map[baid]);
521 if (WARN_ON_ONCE(!ba_data))
522 goto out;
523
524 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
525 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
526 goto out;
527
528 reorder_buf = &ba_data->reorder_buf[queue];
529
530 /* release all frames that are in the reorder buffer to the stack */
0690405f 531 spin_lock_bh(&reorder_buf->lock);
b915c101
SS		 532 iwl_mvm_release_frames(mvm, sta, NULL, reorder_buf,
533 ieee80211_sn_add(reorder_buf->head_sn,
534 reorder_buf->buf_size));
0690405f
SS		 535 spin_unlock_bh(&reorder_buf->lock);
536 del_timer_sync(&reorder_buf->reorder_timer);
b915c101
SS		 537
538out:
539 rcu_read_unlock();
540}
541
94bb4481
SS		 542void iwl_mvm_rx_queue_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
543 int queue)
544{
545 struct iwl_rx_packet *pkt = rxb_addr(rxb);
546 struct iwl_rxq_sync_notification *notif;
547 struct iwl_mvm_internal_rxq_notif *internal_notif;
548
549 notif = (void *)pkt->data;
550 internal_notif = (void *)notif->payload;
551
d0ff5d22
SS		 552 if (internal_notif->sync) {
553 if (mvm->queue_sync_cookie != internal_notif->cookie) {
0636b938
SS		 554 WARN_ONCE(1,
555 "Received expired RX queue sync message\n");
d0ff5d22
SS		 556 return;
557 }
558 atomic_dec(&mvm->queue_sync_counter);
559 }
560
561 switch (internal_notif->type) {
562 case IWL_MVM_RXQ_EMPTY:
0636b938 563 break;
94bb4481 564 case IWL_MVM_RXQ_NOTIF_DEL_BA:
b915c101 565 iwl_mvm_del_ba(mvm, queue, (void *)internal_notif->data);
94bb4481
SS		 566 break;
567 default:
568 WARN_ONCE(1, "Invalid identifier %d", internal_notif->type);
569 }
570}
571
b915c101
SS		 572/*
573 * Returns true if the MPDU was buffered\dropped, false if it should be passed
574 * to upper layer.
575 */
576static bool iwl_mvm_reorder(struct iwl_mvm *mvm,
577 struct napi_struct *napi,
578 int queue,
579 struct ieee80211_sta *sta,
580 struct sk_buff *skb,
581 struct iwl_rx_mpdu_desc *desc)
582{
583 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1f9788f3 584 struct iwl_mvm_sta *mvm_sta;
b915c101
SS		 585 struct iwl_mvm_baid_data *baid_data;
586 struct iwl_mvm_reorder_buffer *buffer;
587 struct sk_buff *tail;
588 u32 reorder = le32_to_cpu(desc->reorder_data);
589 bool amsdu = desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU;
590 u8 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
591 u8 sub_frame_idx = desc->amsdu_info &
592 IWL_RX_MPDU_AMSDU_SUBFRAME_IDX_MASK;
593 int index;
594 u16 nssn, sn;
595 u8 baid;
596
597 baid = (reorder & IWL_RX_MPDU_REORDER_BAID_MASK) >>
598 IWL_RX_MPDU_REORDER_BAID_SHIFT;
599
600 if (baid == IWL_RX_REORDER_DATA_INVALID_BAID)
601 return false;
602
603 /* no sta yet */
604 if (WARN_ON(IS_ERR_OR_NULL(sta)))
605 return false;
606
1f9788f3
LC		 607 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
608
b915c101
SS		 609 /* not a data packet */
610 if (!ieee80211_is_data_qos(hdr->frame_control) ||
611 is_multicast_ether_addr(hdr->addr1))
612 return false;
613
614 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
615 return false;
616
617 baid_data = rcu_dereference(mvm->baid_map[baid]);
618 if (WARN(!baid_data,
619 "Received baid %d, but no data exists for this BAID\n", baid))
620 return false;
621 if (WARN(tid != baid_data->tid || mvm_sta->sta_id != baid_data->sta_id,
622 "baid 0x%x is mapped to sta:%d tid:%d, but was received for sta:%d tid:%d\n",
623 baid, baid_data->sta_id, baid_data->tid, mvm_sta->sta_id,
624 tid))
625 return false;
626
627 nssn = reorder & IWL_RX_MPDU_REORDER_NSSN_MASK;
628 sn = (reorder & IWL_RX_MPDU_REORDER_SN_MASK) >>
629 IWL_RX_MPDU_REORDER_SN_SHIFT;
630
631 buffer = &baid_data->reorder_buf[queue];
632
0690405f
SS		 633 spin_lock_bh(&buffer->lock);
634
b915c101
SS		 635 /*
636 * If there was a significant jump in the nssn - adjust.
637 * If the SN is smaller than the NSSN it might need to first go into
638 * the reorder buffer, in which case we just release up to it and the
639 * rest of the function will take of storing it and releasing up to the
640 * nssn
641 */
74dd1764
SS		 642 if (!iwl_mvm_is_sn_less(nssn, buffer->head_sn + buffer->buf_size,
643 buffer->buf_size)) {
b915c101
SS		 644 u16 min_sn = ieee80211_sn_less(sn, nssn) ? sn : nssn;
645
646 iwl_mvm_release_frames(mvm, sta, napi, buffer, min_sn);
647 }
648
649 /* drop any oudated packets */
650 if (ieee80211_sn_less(sn, buffer->head_sn))
651 goto drop;
652
653 /* release immediately if allowed by nssn and no stored frames */
654 if (!buffer->num_stored && ieee80211_sn_less(sn, nssn)) {
74dd1764
SS		 655 if (iwl_mvm_is_sn_less(buffer->head_sn, nssn,
656 buffer->buf_size))
0690405f 657 buffer->head_sn = nssn;
b915c101 658 /* No need to update AMSDU last SN - we are moving the head */
0690405f 659 spin_unlock_bh(&buffer->lock);
b915c101
SS		 660 return false;
661 }
662
663 index = sn % buffer->buf_size;
664
665 /*
666 * Check if we already stored this frame
667 * As AMSDU is either received or not as whole, logic is simple:
668 * If we have frames in that position in the buffer and the last frame
669 * originated from AMSDU had a different SN then it is a retransmission.
670 * If it is the same SN then if the subframe index is incrementing it
671 * is the same AMSDU - otherwise it is a retransmission.
672 */
673 tail = skb_peek_tail(&buffer->entries[index]);
674 if (tail && !amsdu)
675 goto drop;
676 else if (tail && (sn != buffer->last_amsdu ||
677 buffer->last_sub_index >= sub_frame_idx))
678 goto drop;
679
680 /* put in reorder buffer */
681 __skb_queue_tail(&buffer->entries[index], skb);
682 buffer->num_stored++;
0690405f
SS		 683 buffer->reorder_time[index] = jiffies;
684
b915c101
SS		 685 if (amsdu) {
686 buffer->last_amsdu = sn;
687 buffer->last_sub_index = sub_frame_idx;
688 }
689
690 iwl_mvm_release_frames(mvm, sta, napi, buffer, nssn);
0690405f 691 spin_unlock_bh(&buffer->lock);
b915c101
SS		 692 return true;
693
694drop:
695 kfree_skb(skb);
0690405f 696 spin_unlock_bh(&buffer->lock);
b915c101
SS		 697 return true;
698}
699
10b2b201
SS		 700static void iwl_mvm_agg_rx_received(struct iwl_mvm *mvm, u8 baid)
701{
702 unsigned long now = jiffies;
703 unsigned long timeout;
704 struct iwl_mvm_baid_data *data;
705
706 rcu_read_lock();
707
708 data = rcu_dereference(mvm->baid_map[baid]);
709 if (WARN_ON(!data))
710 goto out;
711
712 if (!data->timeout)
713 goto out;
714
715 timeout = data->timeout;
716 /*
717 * Do not update last rx all the time to avoid cache bouncing
718 * between the rx queues.
719 * Update it every timeout. Worst case is the session will
720 * expire after ~ 2 * timeout, which doesn't matter that much.
721 */
722 if (time_before(data->last_rx + TU_TO_JIFFIES(timeout), now))
723 /* Update is atomic */
724 data->last_rx = now;
725
726out:
727 rcu_read_unlock();
728}
729
780e87c2
JB		 730void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
731 struct iwl_rx_cmd_buffer *rxb, int queue)
732{
733 struct ieee80211_rx_status *rx_status;
734 struct iwl_rx_packet *pkt = rxb_addr(rxb);
735 struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
0c1c6e37 736 struct ieee80211_hdr *hdr = (void *)(pkt->data + sizeof(*desc));
780e87c2
JB		 737 u32 len = le16_to_cpu(desc->mpdu_len);
738 u32 rate_n_flags = le32_to_cpu(desc->rate_n_flags);
739 struct ieee80211_sta *sta = NULL;
740 struct sk_buff *skb;
780e87c2
JB		 741 u8 crypt_len = 0;
742
743 /* Dont use dev_alloc_skb(), we'll have enough headroom once
744 * ieee80211_hdr pulled.
745 */
746 skb = alloc_skb(128, GFP_ATOMIC);
747 if (!skb) {
748 IWL_ERR(mvm, "alloc_skb failed\n");
749 return;
750 }
751
752 rx_status = IEEE80211_SKB_RXCB(skb);
753
754 if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, desc, queue, &crypt_len)) {
755 kfree_skb(skb);
756 return;
757 }
758
759 /*
760 * Keep packets with CRC errors (and with overrun) for monitor mode
761 * (otherwise the firmware discards them) but mark them as bad.
762 */
763 if (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) ||
764 !(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) {
765 IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n",
766 le16_to_cpu(desc->status));
767 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
768 }
769
770 rx_status->mactime = le64_to_cpu(desc->tsf_on_air_rise);
771 rx_status->device_timestamp = le32_to_cpu(desc->gp2_on_air_rise);
57fbcce3
JB		 772 rx_status->band = desc->channel > 14 ? NL80211_BAND_5GHZ :
773 NL80211_BAND_2GHZ;
780e87c2
JB		 774 rx_status->freq = ieee80211_channel_to_frequency(desc->channel,
775 rx_status->band);
776 iwl_mvm_get_signal_strength(mvm, desc, rx_status);
77fe7395
SS		 777 /* TSF as indicated by the firmware is at INA time */
778 rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
780e87c2
JB		 779
780 rcu_read_lock();
781
782 if (le16_to_cpu(desc->status) & IWL_RX_MPDU_STATUS_SRC_STA_FOUND) {
783 u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK;
784
785 if (!WARN_ON_ONCE(id >= IWL_MVM_STATION_COUNT)) {
786 sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
787 if (IS_ERR(sta))
788 sta = NULL;
789 }
790 } else if (!is_multicast_ether_addr(hdr->addr2)) {
791 /*
792 * This is fine since we prevent two stations with the same
793 * address from being added.
794 */
795 sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
796 }
797
798 if (sta) {
799 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
10b2b201
SS		 800 u8 baid = (u8)((le32_to_cpu(desc->reorder_data) &
801 IWL_RX_MPDU_REORDER_BAID_MASK) >>
802 IWL_RX_MPDU_REORDER_BAID_SHIFT);
780e87c2
JB		 803
804 /*
805 * We have tx blocked stations (with CS bit). If we heard
806 * frames from a blocked station on a new channel we can
807 * TX to it again.
808 */
809 if (unlikely(mvm->csa_tx_block_bcn_timeout))
810 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);
811
812 rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
813
814 if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
815 ieee80211_is_beacon(hdr->frame_control)) {
816 struct iwl_fw_dbg_trigger_tlv *trig;
817 struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
818 bool trig_check;
819 s32 rssi;
820
821 trig = iwl_fw_dbg_get_trigger(mvm->fw,
822 FW_DBG_TRIGGER_RSSI);
823 rssi_trig = (void *)trig->data;
824 rssi = le32_to_cpu(rssi_trig->rssi);
825
826 trig_check =
827 iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif,
828 trig);
829 if (trig_check && rx_status->signal < rssi)
830 iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
831 }
832
833 /* TODO: multi queue TCM */
834
835 if (ieee80211_is_data(hdr->frame_control))
836 iwl_mvm_rx_csum(sta, skb, desc);
a571f5f6
SS		 837
838 if (iwl_mvm_is_nonagg_dup(sta, queue, rx_status, hdr, desc)) {
839 kfree_skb(skb);
840 rcu_read_unlock();
841 return;
842 }
62d23403
SS		 843
844 /*
845 * Our hardware de-aggregates AMSDUs but copies the mac header
846 * as it to the de-aggregated MPDUs. We need to turn off the
847 * AMSDU bit in the QoS control ourselves.
848 */
849 if ((desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) &&
850 !WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) {
851 u8 *qc = ieee80211_get_qos_ctl(hdr);
852
853 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
854 }
10b2b201
SS		 855 if (baid != IWL_RX_REORDER_DATA_INVALID_BAID)
856 iwl_mvm_agg_rx_received(mvm, baid);
780e87c2
JB		 857 }
858
780e87c2
JB		 859 /*
860 * TODO: PHY info.
861 * Verify we don't have the information in the MPDU descriptor and
862 * that it is not needed.
863 * Make sure for monitor mode that we are on default queue, update
864 * ampdu_ref and the rest of phy info then
865 */
866
867 /* Set up the HT phy flags */
868 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
869 case RATE_MCS_CHAN_WIDTH_20:
870 break;
871 case RATE_MCS_CHAN_WIDTH_40:
872 rx_status->flag |= RX_FLAG_40MHZ;
873 break;
874 case RATE_MCS_CHAN_WIDTH_80:
875 rx_status->vht_flag |= RX_VHT_FLAG_80MHZ;
876 break;
877 case RATE_MCS_CHAN_WIDTH_160:
878 rx_status->vht_flag |= RX_VHT_FLAG_160MHZ;
879 break;
880 }
881 if (rate_n_flags & RATE_MCS_SGI_MSK)
882 rx_status->flag |= RX_FLAG_SHORT_GI;
883 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
884 rx_status->flag |= RX_FLAG_HT_GF;
885 if (rate_n_flags & RATE_MCS_LDPC_MSK)
886 rx_status->flag |= RX_FLAG_LDPC;
887 if (rate_n_flags & RATE_MCS_HT_MSK) {
888 u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
889 RATE_MCS_STBC_POS;
890 rx_status->flag |= RX_FLAG_HT;
891 rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
892 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
893 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
894 u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >>
895 RATE_MCS_STBC_POS;
896 rx_status->vht_nss =
897 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
898 RATE_VHT_MCS_NSS_POS) + 1;
899 rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
900 rx_status->flag |= RX_FLAG_VHT;
901 rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
902 if (rate_n_flags & RATE_MCS_BF_MSK)
903 rx_status->vht_flag |= RX_VHT_FLAG_BF;
904 } else {
905 rx_status->rate_idx =
906 iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
907 rx_status->band);
908 }
909
910 /* TODO: PHY info - update ampdu queue statistics (for debugfs) */
911 /* TODO: PHY info - gscan */
912
f5e28eac 913 iwl_mvm_create_skb(skb, hdr, len, crypt_len, rxb);
b915c101
SS		 914 if (!iwl_mvm_reorder(mvm, napi, queue, sta, skb, desc))
915 iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, queue, sta);
f5e28eac 916 rcu_read_unlock();
780e87c2 917}
585a6fcc 918
a338384b 919void iwl_mvm_rx_frame_release(struct iwl_mvm *mvm, struct napi_struct *napi,
585a6fcc
SS		 920 struct iwl_rx_cmd_buffer *rxb, int queue)
921{
a338384b
SS		 922 struct iwl_rx_packet *pkt = rxb_addr(rxb);
923 struct iwl_frame_release *release = (void *)pkt->data;
924 struct ieee80211_sta *sta;
925 struct iwl_mvm_reorder_buffer *reorder_buf;
926 struct iwl_mvm_baid_data *ba_data;
927
928 int baid = release->baid;
929
930 if (WARN_ON_ONCE(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
931 return;
932
933 rcu_read_lock();
934
935 ba_data = rcu_dereference(mvm->baid_map[baid]);
936 if (WARN_ON_ONCE(!ba_data))
937 goto out;
938
939 sta = rcu_dereference(mvm->fw_id_to_mac_id[ba_data->sta_id]);
940 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
941 goto out;
942
943 reorder_buf = &ba_data->reorder_buf[queue];
944
945 spin_lock_bh(&reorder_buf->lock);
946 iwl_mvm_release_frames(mvm, sta, napi, reorder_buf,
947 le16_to_cpu(release->nssn));
948 spin_unlock_bh(&reorder_buf->lock);
949
950out:
951 rcu_read_unlock();
585a6fcc 952}
Linux 6.x block layer and io_uring tree(s)