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Merge tag 'iwlwifi-for-kalle-2016-02-15' into HEAD
[mirror_ubuntu-artful-kernel.git] / drivers / net / wireless / intel / iwlwifi / mvm / tx.c
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 *
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
26 * in the file called COPYING.
27 *
28 * Contact Information:
29 * Intel Linux Wireless <linuxwifi@intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31 *
32 * BSD LICENSE
33 *
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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 *
64 *****************************************************************************/
65 #include <linux/ieee80211.h>
66 #include <linux/etherdevice.h>
67 #include <linux/tcp.h>
68
69 #include "iwl-trans.h"
70 #include "iwl-eeprom-parse.h"
71 #include "mvm.h"
72 #include "sta.h"
73 #include "fw-dbg.h"
74
75 static void
76 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
77 u16 tid, u16 ssn)
78 {
79 struct iwl_fw_dbg_trigger_tlv *trig;
80 struct iwl_fw_dbg_trigger_ba *ba_trig;
81
82 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
83 return;
84
85 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
86 ba_trig = (void *)trig->data;
87
88 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
89 return;
90
91 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
92 return;
93
94 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
95 "BAR sent to %pM, tid %d, ssn %d",
96 addr, tid, ssn);
97 }
98
99 /*
100 * Sets most of the Tx cmd's fields
101 */
102 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
103 struct iwl_tx_cmd *tx_cmd,
104 struct ieee80211_tx_info *info, u8 sta_id)
105 {
106 struct ieee80211_hdr *hdr = (void *)skb->data;
107 __le16 fc = hdr->frame_control;
108 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
109 u32 len = skb->len + FCS_LEN;
110 u8 ac;
111
112 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
113 tx_flags |= TX_CMD_FLG_ACK;
114 else
115 tx_flags &= ~TX_CMD_FLG_ACK;
116
117 if (ieee80211_is_probe_resp(fc))
118 tx_flags |= TX_CMD_FLG_TSF;
119
120 if (ieee80211_has_morefrags(fc))
121 tx_flags |= TX_CMD_FLG_MORE_FRAG;
122
123 if (ieee80211_is_data_qos(fc)) {
124 u8 *qc = ieee80211_get_qos_ctl(hdr);
125 tx_cmd->tid_tspec = qc[0] & 0xf;
126 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
127 } else if (ieee80211_is_back_req(fc)) {
128 struct ieee80211_bar *bar = (void *)skb->data;
129 u16 control = le16_to_cpu(bar->control);
130 u16 ssn = le16_to_cpu(bar->start_seq_num);
131
132 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
133 tx_cmd->tid_tspec = (control &
134 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
135 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
136 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
137 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
138 ssn);
139 } else {
140 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
141 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
142 tx_flags |= TX_CMD_FLG_SEQ_CTL;
143 else
144 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
145 }
146
147 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
148 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
149 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
150 else
151 ac = tid_to_mac80211_ac[0];
152
153 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
154 TX_CMD_FLG_BT_PRIO_POS;
155
156 if (ieee80211_is_mgmt(fc)) {
157 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
158 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
159 else if (ieee80211_is_action(fc))
160 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
161 else
162 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
163
164 /* The spec allows Action frames in A-MPDU, we don't support
165 * it
166 */
167 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
168 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
169 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
170 } else {
171 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
172 }
173
174 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
175 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
176 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
177
178 if (fw_has_capa(&mvm->fw->ucode_capa,
179 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
180 ieee80211_action_contains_tpc(skb))
181 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
182
183 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
184 /* Total # bytes to be transmitted */
185 tx_cmd->len = cpu_to_le16((u16)skb->len);
186 tx_cmd->next_frame_len = 0;
187 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
188 tx_cmd->sta_id = sta_id;
189 }
190
191 /*
192 * Sets the fields in the Tx cmd that are rate related
193 */
194 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
195 struct ieee80211_tx_info *info,
196 struct ieee80211_sta *sta, __le16 fc)
197 {
198 u32 rate_flags;
199 int rate_idx;
200 u8 rate_plcp;
201
202 /* Set retry limit on RTS packets */
203 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
204
205 /* Set retry limit on DATA packets and Probe Responses*/
206 if (ieee80211_is_probe_resp(fc)) {
207 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
208 tx_cmd->rts_retry_limit =
209 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
210 } else if (ieee80211_is_back_req(fc)) {
211 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
212 } else {
213 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
214 }
215
216 /*
217 * for data packets, rate info comes from the table inside the fw. This
218 * table is controlled by LINK_QUALITY commands
219 */
220
221 if (ieee80211_is_data(fc) && sta) {
222 tx_cmd->initial_rate_index = 0;
223 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
224 return;
225 } else if (ieee80211_is_back_req(fc)) {
226 tx_cmd->tx_flags |=
227 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
228 }
229
230 /* HT rate doesn't make sense for a non data frame */
231 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
232 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n",
233 info->control.rates[0].flags,
234 info->control.rates[0].idx,
235 le16_to_cpu(fc));
236
237 rate_idx = info->control.rates[0].idx;
238 /* if the rate isn't a well known legacy rate, take the lowest one */
239 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
240 rate_idx = rate_lowest_index(
241 &mvm->nvm_data->bands[info->band], sta);
242
243 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
244 if (info->band == IEEE80211_BAND_5GHZ)
245 rate_idx += IWL_FIRST_OFDM_RATE;
246
247 /* For 2.4 GHZ band, check that there is no need to remap */
248 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
249
250 /* Get PLCP rate for tx_cmd->rate_n_flags */
251 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
252
253 mvm->mgmt_last_antenna_idx =
254 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
255 mvm->mgmt_last_antenna_idx);
256
257 if (info->band == IEEE80211_BAND_2GHZ &&
258 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
259 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
260 else
261 rate_flags =
262 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
263
264 /* Set CCK flag as needed */
265 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
266 rate_flags |= RATE_MCS_CCK_MSK;
267
268 /* Set the rate in the TX cmd */
269 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
270 }
271
272 /*
273 * Sets the fields in the Tx cmd that are crypto related
274 */
275 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
276 struct ieee80211_tx_info *info,
277 struct iwl_tx_cmd *tx_cmd,
278 struct sk_buff *skb_frag,
279 int hdrlen)
280 {
281 struct ieee80211_key_conf *keyconf = info->control.hw_key;
282 u8 *crypto_hdr = skb_frag->data + hdrlen;
283 u64 pn;
284
285 switch (keyconf->cipher) {
286 case WLAN_CIPHER_SUITE_CCMP:
287 case WLAN_CIPHER_SUITE_CCMP_256:
288 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
289 pn = atomic64_inc_return(&keyconf->tx_pn);
290 crypto_hdr[0] = pn;
291 crypto_hdr[2] = 0;
292 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
293 crypto_hdr[1] = pn >> 8;
294 crypto_hdr[4] = pn >> 16;
295 crypto_hdr[5] = pn >> 24;
296 crypto_hdr[6] = pn >> 32;
297 crypto_hdr[7] = pn >> 40;
298 break;
299
300 case WLAN_CIPHER_SUITE_TKIP:
301 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
302 pn = atomic64_inc_return(&keyconf->tx_pn);
303 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
304 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
305 break;
306
307 case WLAN_CIPHER_SUITE_WEP104:
308 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
309 /* fall through */
310 case WLAN_CIPHER_SUITE_WEP40:
311 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
312 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
313 TX_CMD_SEC_WEP_KEY_IDX_MSK);
314
315 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
316 break;
317 default:
318 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
319 }
320 }
321
322 /*
323 * Allocates and sets the Tx cmd the driver data pointers in the skb
324 */
325 static struct iwl_device_cmd *
326 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
327 int hdrlen, struct ieee80211_sta *sta, u8 sta_id)
328 {
329 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
330 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
331 struct iwl_device_cmd *dev_cmd;
332 struct iwl_tx_cmd *tx_cmd;
333
334 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
335
336 if (unlikely(!dev_cmd))
337 return NULL;
338
339 memset(dev_cmd, 0, sizeof(*dev_cmd));
340 dev_cmd->hdr.cmd = TX_CMD;
341 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
342
343 if (info->control.hw_key)
344 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
345
346 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
347
348 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
349
350 memset(&info->status, 0, sizeof(info->status));
351 memset(info->driver_data, 0, sizeof(info->driver_data));
352
353 info->driver_data[1] = dev_cmd;
354
355 return dev_cmd;
356 }
357
358 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
359 {
360 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
361 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
362 struct iwl_device_cmd *dev_cmd;
363 struct iwl_tx_cmd *tx_cmd;
364 u8 sta_id;
365 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
366
367 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU))
368 return -1;
369
370 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
371 (!info->control.vif ||
372 info->hw_queue != info->control.vif->cab_queue)))
373 return -1;
374
375 /*
376 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
377 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
378 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
379 * and hence needs to be sent on the aux queue
380 */
381 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
382 info->control.vif->type == NL80211_IFTYPE_STATION)
383 IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue;
384
385 /*
386 * If the interface on which the frame is sent is the P2P_DEVICE
387 * or an AP/GO interface use the broadcast station associated
388 * with it; otherwise if the interface is a managed interface
389 * use the AP station associated with it for multicast traffic
390 * (this is not possible for unicast packets as a TLDS discovery
391 * response are sent without a station entry); otherwise use the
392 * AUX station.
393 */
394 sta_id = mvm->aux_sta.sta_id;
395 if (info->control.vif) {
396 struct iwl_mvm_vif *mvmvif =
397 iwl_mvm_vif_from_mac80211(info->control.vif);
398
399 if (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
400 info->control.vif->type == NL80211_IFTYPE_AP)
401 sta_id = mvmvif->bcast_sta.sta_id;
402 else if (info->control.vif->type == NL80211_IFTYPE_STATION &&
403 is_multicast_ether_addr(hdr->addr1)) {
404 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id);
405
406 if (ap_sta_id != IWL_MVM_STATION_COUNT)
407 sta_id = ap_sta_id;
408 }
409 }
410
411 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue);
412
413 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, hdrlen, NULL, sta_id);
414 if (!dev_cmd)
415 return -1;
416
417 /* From now on, we cannot access info->control */
418 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
419
420 /* Copy MAC header from skb into command buffer */
421 memcpy(tx_cmd->hdr, hdr, hdrlen);
422
423 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) {
424 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
425 return -1;
426 }
427
428 return 0;
429 }
430
431 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb_gso,
432 struct ieee80211_sta *sta,
433 struct sk_buff_head *mpdus_skb)
434 {
435 struct sk_buff *tmp, *next;
436 char cb[sizeof(skb_gso->cb)];
437
438 memcpy(cb, skb_gso->cb, sizeof(cb));
439 next = skb_gso_segment(skb_gso, 0);
440 if (IS_ERR(next))
441 return -EINVAL;
442 else if (next)
443 consume_skb(skb_gso);
444
445 while (next) {
446 tmp = next;
447 next = tmp->next;
448 memcpy(tmp->cb, cb, sizeof(tmp->cb));
449
450 tmp->prev = NULL;
451 tmp->next = NULL;
452
453 __skb_queue_tail(mpdus_skb, tmp);
454 }
455
456 return 0;
457 }
458
459 /*
460 * Sets the fields in the Tx cmd that are crypto related
461 */
462 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
463 struct ieee80211_sta *sta)
464 {
465 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
466 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
467 struct iwl_mvm_sta *mvmsta;
468 struct iwl_device_cmd *dev_cmd;
469 struct iwl_tx_cmd *tx_cmd;
470 __le16 fc;
471 u16 seq_number = 0;
472 u8 tid = IWL_MAX_TID_COUNT;
473 u8 txq_id = info->hw_queue;
474 bool is_data_qos = false, is_ampdu = false;
475 int hdrlen;
476
477 mvmsta = iwl_mvm_sta_from_mac80211(sta);
478 fc = hdr->frame_control;
479 hdrlen = ieee80211_hdrlen(fc);
480
481 if (WARN_ON_ONCE(!mvmsta))
482 return -1;
483
484 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
485 return -1;
486
487 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, hdrlen, sta, mvmsta->sta_id);
488 if (!dev_cmd)
489 goto drop;
490
491 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
492 /* From now on, we cannot access info->control */
493
494 /*
495 * we handle that entirely ourselves -- for uAPSD the firmware
496 * will always send a notification, and for PS-Poll responses
497 * we'll notify mac80211 when getting frame status
498 */
499 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
500
501 spin_lock(&mvmsta->lock);
502
503 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
504 u8 *qc = NULL;
505 qc = ieee80211_get_qos_ctl(hdr);
506 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
507 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
508 goto drop_unlock_sta;
509
510 seq_number = mvmsta->tid_data[tid].seq_number;
511 seq_number &= IEEE80211_SCTL_SEQ;
512 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
513 hdr->seq_ctrl |= cpu_to_le16(seq_number);
514 is_data_qos = true;
515 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
516 }
517
518 /* Copy MAC header from skb into command buffer */
519 memcpy(tx_cmd->hdr, hdr, hdrlen);
520
521 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
522
523 if (sta->tdls) {
524 /* default to TID 0 for non-QoS packets */
525 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
526
527 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
528 }
529
530 if (is_ampdu) {
531 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
532 goto drop_unlock_sta;
533 txq_id = mvmsta->tid_data[tid].txq_id;
534 }
535
536 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
537 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
538
539 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
540 goto drop_unlock_sta;
541
542 if (is_data_qos && !ieee80211_has_morefrags(fc))
543 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
544
545 spin_unlock(&mvmsta->lock);
546
547 if (txq_id < mvm->first_agg_queue)
548 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
549
550 return 0;
551
552 drop_unlock_sta:
553 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
554 spin_unlock(&mvmsta->lock);
555 drop:
556 return -1;
557 }
558
559 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
560 struct ieee80211_sta *sta)
561 {
562 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
563 struct sk_buff_head mpdus_skbs;
564 unsigned int payload_len;
565 int ret;
566
567 if (WARN_ON_ONCE(!mvmsta))
568 return -1;
569
570 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
571 return -1;
572
573 if (!skb_is_gso(skb))
574 return iwl_mvm_tx_mpdu(mvm, skb, sta);
575
576 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
577 tcp_hdrlen(skb) + skb->data_len;
578
579 if (payload_len <= skb_shinfo(skb)->gso_size)
580 return iwl_mvm_tx_mpdu(mvm, skb, sta);
581
582 __skb_queue_head_init(&mpdus_skbs);
583
584 ret = iwl_mvm_tx_tso(mvm, skb, sta, &mpdus_skbs);
585 if (ret)
586 return ret;
587
588 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
589 return ret;
590
591 while (!skb_queue_empty(&mpdus_skbs)) {
592 struct sk_buff *skb = __skb_dequeue(&mpdus_skbs);
593
594 ret = iwl_mvm_tx_mpdu(mvm, skb, sta);
595 if (ret) {
596 __skb_queue_purge(&mpdus_skbs);
597 return ret;
598 }
599 }
600
601 return 0;
602 }
603
604 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
605 struct ieee80211_sta *sta, u8 tid)
606 {
607 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
608 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
609 struct ieee80211_vif *vif = mvmsta->vif;
610
611 lockdep_assert_held(&mvmsta->lock);
612
613 if ((tid_data->state == IWL_AGG_ON ||
614 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
615 iwl_mvm_tid_queued(tid_data) == 0) {
616 /*
617 * Now that this aggregation queue is empty tell mac80211 so it
618 * knows we no longer have frames buffered for the station on
619 * this TID (for the TIM bitmap calculation.)
620 */
621 ieee80211_sta_set_buffered(sta, tid, false);
622 }
623
624 if (tid_data->ssn != tid_data->next_reclaimed)
625 return;
626
627 switch (tid_data->state) {
628 case IWL_EMPTYING_HW_QUEUE_ADDBA:
629 IWL_DEBUG_TX_QUEUES(mvm,
630 "Can continue addBA flow ssn = next_recl = %d\n",
631 tid_data->next_reclaimed);
632 tid_data->state = IWL_AGG_STARTING;
633 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
634 break;
635
636 case IWL_EMPTYING_HW_QUEUE_DELBA:
637 IWL_DEBUG_TX_QUEUES(mvm,
638 "Can continue DELBA flow ssn = next_recl = %d\n",
639 tid_data->next_reclaimed);
640 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
641 vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
642 CMD_ASYNC);
643 tid_data->state = IWL_AGG_OFF;
644 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
645 break;
646
647 default:
648 break;
649 }
650 }
651
652 #ifdef CONFIG_IWLWIFI_DEBUG
653 const char *iwl_mvm_get_tx_fail_reason(u32 status)
654 {
655 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
656 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
657
658 switch (status & TX_STATUS_MSK) {
659 case TX_STATUS_SUCCESS:
660 return "SUCCESS";
661 TX_STATUS_POSTPONE(DELAY);
662 TX_STATUS_POSTPONE(FEW_BYTES);
663 TX_STATUS_POSTPONE(BT_PRIO);
664 TX_STATUS_POSTPONE(QUIET_PERIOD);
665 TX_STATUS_POSTPONE(CALC_TTAK);
666 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
667 TX_STATUS_FAIL(SHORT_LIMIT);
668 TX_STATUS_FAIL(LONG_LIMIT);
669 TX_STATUS_FAIL(UNDERRUN);
670 TX_STATUS_FAIL(DRAIN_FLOW);
671 TX_STATUS_FAIL(RFKILL_FLUSH);
672 TX_STATUS_FAIL(LIFE_EXPIRE);
673 TX_STATUS_FAIL(DEST_PS);
674 TX_STATUS_FAIL(HOST_ABORTED);
675 TX_STATUS_FAIL(BT_RETRY);
676 TX_STATUS_FAIL(STA_INVALID);
677 TX_STATUS_FAIL(FRAG_DROPPED);
678 TX_STATUS_FAIL(TID_DISABLE);
679 TX_STATUS_FAIL(FIFO_FLUSHED);
680 TX_STATUS_FAIL(SMALL_CF_POLL);
681 TX_STATUS_FAIL(FW_DROP);
682 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
683 }
684
685 return "UNKNOWN";
686
687 #undef TX_STATUS_FAIL
688 #undef TX_STATUS_POSTPONE
689 }
690 #endif /* CONFIG_IWLWIFI_DEBUG */
691
692 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
693 enum ieee80211_band band,
694 struct ieee80211_tx_rate *r)
695 {
696 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
697 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
698 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
699 case RATE_MCS_CHAN_WIDTH_20:
700 break;
701 case RATE_MCS_CHAN_WIDTH_40:
702 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
703 break;
704 case RATE_MCS_CHAN_WIDTH_80:
705 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
706 break;
707 case RATE_MCS_CHAN_WIDTH_160:
708 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
709 break;
710 }
711 if (rate_n_flags & RATE_MCS_SGI_MSK)
712 r->flags |= IEEE80211_TX_RC_SHORT_GI;
713 if (rate_n_flags & RATE_MCS_HT_MSK) {
714 r->flags |= IEEE80211_TX_RC_MCS;
715 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
716 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
717 ieee80211_rate_set_vht(
718 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
719 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
720 RATE_VHT_MCS_NSS_POS) + 1);
721 r->flags |= IEEE80211_TX_RC_VHT_MCS;
722 } else {
723 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
724 band);
725 }
726 }
727
728 /**
729 * translate ucode response to mac80211 tx status control values
730 */
731 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
732 struct ieee80211_tx_info *info)
733 {
734 struct ieee80211_tx_rate *r = &info->status.rates[0];
735
736 info->status.antenna =
737 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
738 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
739 }
740
741 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
742 u32 status)
743 {
744 struct iwl_fw_dbg_trigger_tlv *trig;
745 struct iwl_fw_dbg_trigger_tx_status *status_trig;
746 int i;
747
748 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
749 return;
750
751 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
752 status_trig = (void *)trig->data;
753
754 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
755 return;
756
757 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
758 /* don't collect on status 0 */
759 if (!status_trig->statuses[i].status)
760 break;
761
762 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
763 continue;
764
765 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
766 "Tx status %d was received",
767 status & TX_STATUS_MSK);
768 break;
769 }
770 }
771
772 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
773 struct iwl_rx_packet *pkt)
774 {
775 struct ieee80211_sta *sta;
776 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
777 int txq_id = SEQ_TO_QUEUE(sequence);
778 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
779 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
780 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
781 u32 status = le16_to_cpu(tx_resp->status.status);
782 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
783 struct iwl_mvm_sta *mvmsta;
784 struct sk_buff_head skbs;
785 u8 skb_freed = 0;
786 u16 next_reclaimed, seq_ctl;
787
788 __skb_queue_head_init(&skbs);
789
790 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
791
792 /* we can free until ssn % q.n_bd not inclusive */
793 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
794
795 while (!skb_queue_empty(&skbs)) {
796 struct sk_buff *skb = __skb_dequeue(&skbs);
797 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
798
799 skb_freed++;
800
801 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
802
803 memset(&info->status, 0, sizeof(info->status));
804
805 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
806
807 /* inform mac80211 about what happened with the frame */
808 switch (status & TX_STATUS_MSK) {
809 case TX_STATUS_SUCCESS:
810 case TX_STATUS_DIRECT_DONE:
811 info->flags |= IEEE80211_TX_STAT_ACK;
812 break;
813 case TX_STATUS_FAIL_DEST_PS:
814 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
815 break;
816 default:
817 break;
818 }
819
820 iwl_mvm_tx_status_check_trigger(mvm, status);
821
822 info->status.rates[0].count = tx_resp->failure_frame + 1;
823 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
824 info);
825 info->status.status_driver_data[1] =
826 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
827
828 /* Single frame failure in an AMPDU queue => send BAR */
829 if (txq_id >= mvm->first_agg_queue &&
830 !(info->flags & IEEE80211_TX_STAT_ACK) &&
831 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
832 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
833
834 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
835 if (status != TX_STATUS_SUCCESS) {
836 struct ieee80211_hdr *hdr = (void *)skb->data;
837 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
838 }
839
840 /*
841 * TODO: this is not accurate if we are freeing more than one
842 * packet.
843 */
844 info->status.tx_time =
845 le16_to_cpu(tx_resp->wireless_media_time);
846 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
847 info->status.status_driver_data[0] =
848 (void *)(uintptr_t)tx_resp->reduced_tpc;
849
850 ieee80211_tx_status(mvm->hw, skb);
851 }
852
853 if (txq_id >= mvm->first_agg_queue) {
854 /* If this is an aggregation queue, we use the ssn since:
855 * ssn = wifi seq_num % 256.
856 * The seq_ctl is the sequence control of the packet to which
857 * this Tx response relates. But if there is a hole in the
858 * bitmap of the BA we received, this Tx response may allow to
859 * reclaim the hole and all the subsequent packets that were
860 * already acked. In that case, seq_ctl != ssn, and the next
861 * packet to be reclaimed will be ssn and not seq_ctl. In that
862 * case, several packets will be reclaimed even if
863 * frame_count = 1.
864 *
865 * The ssn is the index (% 256) of the latest packet that has
866 * treated (acked / dropped) + 1.
867 */
868 next_reclaimed = ssn;
869 } else {
870 /* The next packet to be reclaimed is the one after this one */
871 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
872 }
873
874 IWL_DEBUG_TX_REPLY(mvm,
875 "TXQ %d status %s (0x%08x)\n",
876 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
877
878 IWL_DEBUG_TX_REPLY(mvm,
879 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
880 le32_to_cpu(tx_resp->initial_rate),
881 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
882 ssn, next_reclaimed, seq_ctl);
883
884 rcu_read_lock();
885
886 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
887 /*
888 * sta can't be NULL otherwise it'd mean that the sta has been freed in
889 * the firmware while we still have packets for it in the Tx queues.
890 */
891 if (WARN_ON_ONCE(!sta))
892 goto out;
893
894 if (!IS_ERR(sta)) {
895 mvmsta = iwl_mvm_sta_from_mac80211(sta);
896
897 if (tid != IWL_TID_NON_QOS) {
898 struct iwl_mvm_tid_data *tid_data =
899 &mvmsta->tid_data[tid];
900 bool send_eosp_ndp = false;
901
902 spin_lock_bh(&mvmsta->lock);
903 tid_data->next_reclaimed = next_reclaimed;
904 IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n",
905 next_reclaimed);
906 iwl_mvm_check_ratid_empty(mvm, sta, tid);
907
908 if (mvmsta->sleep_tx_count) {
909 mvmsta->sleep_tx_count--;
910 if (mvmsta->sleep_tx_count &&
911 !iwl_mvm_tid_queued(tid_data)) {
912 /*
913 * The number of frames in the queue
914 * dropped to 0 even if we sent less
915 * frames than we thought we had on the
916 * Tx queue.
917 * This means we had holes in the BA
918 * window that we just filled, ask
919 * mac80211 to send EOSP since the
920 * firmware won't know how to do that.
921 * Send NDP and the firmware will send
922 * EOSP notification that will trigger
923 * a call to ieee80211_sta_eosp().
924 */
925 send_eosp_ndp = true;
926 }
927 }
928
929 spin_unlock_bh(&mvmsta->lock);
930 if (send_eosp_ndp) {
931 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
932 IEEE80211_FRAME_RELEASE_UAPSD,
933 1, tid, false, false);
934 mvmsta->sleep_tx_count = 0;
935 ieee80211_send_eosp_nullfunc(sta, tid);
936 }
937 }
938
939 if (mvmsta->next_status_eosp) {
940 mvmsta->next_status_eosp = false;
941 ieee80211_sta_eosp(sta);
942 }
943 } else {
944 mvmsta = NULL;
945 }
946
947 /*
948 * If the txq is not an AMPDU queue, there is no chance we freed
949 * several skbs. Check that out...
950 */
951 if (txq_id >= mvm->first_agg_queue)
952 goto out;
953
954 /* We can't free more than one frame at once on a shared queue */
955 WARN_ON(skb_freed > 1);
956
957 /* If we have still frames for this STA nothing to do here */
958 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
959 goto out;
960
961 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
962
963 /*
964 * If there are no pending frames for this STA and
965 * the tx to this station is not disabled, notify
966 * mac80211 that this station can now wake up in its
967 * STA table.
968 * If mvmsta is not NULL, sta is valid.
969 */
970
971 spin_lock_bh(&mvmsta->lock);
972
973 if (!mvmsta->disable_tx)
974 ieee80211_sta_block_awake(mvm->hw, sta, false);
975
976 spin_unlock_bh(&mvmsta->lock);
977 }
978
979 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
980 /*
981 * We are draining and this was the last packet - pre_rcu_remove
982 * has been called already. We might be after the
983 * synchronize_net already.
984 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
985 */
986 set_bit(sta_id, mvm->sta_drained);
987 schedule_work(&mvm->sta_drained_wk);
988 }
989
990 out:
991 rcu_read_unlock();
992 }
993
994 #ifdef CONFIG_IWLWIFI_DEBUG
995 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
996 static const char *iwl_get_agg_tx_status(u16 status)
997 {
998 switch (status & AGG_TX_STATE_STATUS_MSK) {
999 AGG_TX_STATE_(TRANSMITTED);
1000 AGG_TX_STATE_(UNDERRUN);
1001 AGG_TX_STATE_(BT_PRIO);
1002 AGG_TX_STATE_(FEW_BYTES);
1003 AGG_TX_STATE_(ABORT);
1004 AGG_TX_STATE_(LAST_SENT_TTL);
1005 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1006 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1007 AGG_TX_STATE_(SCD_QUERY);
1008 AGG_TX_STATE_(TEST_BAD_CRC32);
1009 AGG_TX_STATE_(RESPONSE);
1010 AGG_TX_STATE_(DUMP_TX);
1011 AGG_TX_STATE_(DELAY_TX);
1012 }
1013
1014 return "UNKNOWN";
1015 }
1016
1017 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1018 struct iwl_rx_packet *pkt)
1019 {
1020 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1021 struct agg_tx_status *frame_status = &tx_resp->status;
1022 int i;
1023
1024 for (i = 0; i < tx_resp->frame_count; i++) {
1025 u16 fstatus = le16_to_cpu(frame_status[i].status);
1026
1027 IWL_DEBUG_TX_REPLY(mvm,
1028 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1029 iwl_get_agg_tx_status(fstatus),
1030 fstatus & AGG_TX_STATE_STATUS_MSK,
1031 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1032 AGG_TX_STATE_TRY_CNT_POS,
1033 le16_to_cpu(frame_status[i].sequence));
1034 }
1035 }
1036 #else
1037 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1038 struct iwl_rx_packet *pkt)
1039 {}
1040 #endif /* CONFIG_IWLWIFI_DEBUG */
1041
1042 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1043 struct iwl_rx_packet *pkt)
1044 {
1045 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1046 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1047 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1048 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1049 struct ieee80211_sta *sta;
1050
1051 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue))
1052 return;
1053
1054 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1055 return;
1056
1057 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1058
1059 rcu_read_lock();
1060
1061 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1062
1063 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1064 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1065 mvmsta->tid_data[tid].rate_n_flags =
1066 le32_to_cpu(tx_resp->initial_rate);
1067 mvmsta->tid_data[tid].tx_time =
1068 le16_to_cpu(tx_resp->wireless_media_time);
1069 }
1070
1071 rcu_read_unlock();
1072 }
1073
1074 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1075 {
1076 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1077 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1078
1079 if (tx_resp->frame_count == 1)
1080 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1081 else
1082 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1083 }
1084
1085 static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info,
1086 struct iwl_mvm_ba_notif *ba_notif,
1087 struct iwl_mvm_tid_data *tid_data)
1088 {
1089 info->flags |= IEEE80211_TX_STAT_AMPDU;
1090 info->status.ampdu_ack_len = ba_notif->txed_2_done;
1091 info->status.ampdu_len = ba_notif->txed;
1092 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
1093 info);
1094 /* TODO: not accounted if the whole A-MPDU failed */
1095 info->status.tx_time = tid_data->tx_time;
1096 info->status.status_driver_data[0] =
1097 (void *)(uintptr_t)ba_notif->reduced_txp;
1098 info->status.status_driver_data[1] =
1099 (void *)(uintptr_t)tid_data->rate_n_flags;
1100 }
1101
1102 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1103 {
1104 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1105 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
1106 struct sk_buff_head reclaimed_skbs;
1107 struct iwl_mvm_tid_data *tid_data;
1108 struct ieee80211_sta *sta;
1109 struct iwl_mvm_sta *mvmsta;
1110 struct sk_buff *skb;
1111 int sta_id, tid, freed;
1112 /* "flow" corresponds to Tx queue */
1113 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
1114 /* "ssn" is start of block-ack Tx window, corresponds to index
1115 * (in Tx queue's circular buffer) of first TFD/frame in window */
1116 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
1117
1118 sta_id = ba_notif->sta_id;
1119 tid = ba_notif->tid;
1120
1121 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1122 tid >= IWL_MAX_TID_COUNT,
1123 "sta_id %d tid %d", sta_id, tid))
1124 return;
1125
1126 rcu_read_lock();
1127
1128 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1129
1130 /* Reclaiming frames for a station that has been deleted ? */
1131 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1132 rcu_read_unlock();
1133 return;
1134 }
1135
1136 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1137 tid_data = &mvmsta->tid_data[tid];
1138
1139 if (tid_data->txq_id != scd_flow) {
1140 IWL_ERR(mvm,
1141 "invalid BA notification: Q %d, tid %d, flow %d\n",
1142 tid_data->txq_id, tid, scd_flow);
1143 rcu_read_unlock();
1144 return;
1145 }
1146
1147 spin_lock_bh(&mvmsta->lock);
1148
1149 __skb_queue_head_init(&reclaimed_skbs);
1150
1151 /*
1152 * Release all TFDs before the SSN, i.e. all TFDs in front of
1153 * block-ack window (we assume that they've been successfully
1154 * transmitted ... if not, it's too late anyway).
1155 */
1156 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
1157 &reclaimed_skbs);
1158
1159 IWL_DEBUG_TX_REPLY(mvm,
1160 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1161 (u8 *)&ba_notif->sta_addr_lo32,
1162 ba_notif->sta_id);
1163 IWL_DEBUG_TX_REPLY(mvm,
1164 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1165 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1166 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
1167 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
1168 ba_notif->txed_2_done);
1169
1170 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1171 ba_notif->reduced_txp);
1172 tid_data->next_reclaimed = ba_resp_scd_ssn;
1173
1174 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1175
1176 freed = 0;
1177
1178 skb_queue_walk(&reclaimed_skbs, skb) {
1179 struct ieee80211_hdr *hdr = (void *)skb->data;
1180 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1181
1182 if (ieee80211_is_data_qos(hdr->frame_control))
1183 freed++;
1184 else
1185 WARN_ON_ONCE(1);
1186
1187 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1188
1189 memset(&info->status, 0, sizeof(info->status));
1190 /* Packet was transmitted successfully, failures come as single
1191 * frames because before failing a frame the firmware transmits
1192 * it without aggregation at least once.
1193 */
1194 info->flags |= IEEE80211_TX_STAT_ACK;
1195
1196 /* this is the first skb we deliver in this batch */
1197 /* put the rate scaling data there */
1198 if (freed == 1)
1199 iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data);
1200 }
1201
1202 spin_unlock_bh(&mvmsta->lock);
1203
1204 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1205 * possible (i.e. first MPDU in the aggregation wasn't acked)
1206 * Still it's important to update RS about sent vs. acked.
1207 */
1208 if (skb_queue_empty(&reclaimed_skbs)) {
1209 struct ieee80211_tx_info ba_info = {};
1210 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1211
1212 if (mvmsta->vif)
1213 chanctx_conf =
1214 rcu_dereference(mvmsta->vif->chanctx_conf);
1215
1216 if (WARN_ON_ONCE(!chanctx_conf))
1217 goto out;
1218
1219 ba_info.band = chanctx_conf->def.chan->band;
1220 iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data);
1221
1222 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1223 iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info);
1224 }
1225
1226 out:
1227 rcu_read_unlock();
1228
1229 while (!skb_queue_empty(&reclaimed_skbs)) {
1230 skb = __skb_dequeue(&reclaimed_skbs);
1231 ieee80211_tx_status(mvm->hw, skb);
1232 }
1233 }
1234
1235 /*
1236 * Note that there are transports that buffer frames before they reach
1237 * the firmware. This means that after flush_tx_path is called, the
1238 * queue might not be empty. The race-free way to handle this is to:
1239 * 1) set the station as draining
1240 * 2) flush the Tx path
1241 * 3) wait for the transport queues to be empty
1242 */
1243 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1244 {
1245 int ret;
1246 struct iwl_tx_path_flush_cmd flush_cmd = {
1247 .queues_ctl = cpu_to_le32(tfd_msk),
1248 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1249 };
1250
1251 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1252 sizeof(flush_cmd), &flush_cmd);
1253 if (ret)
1254 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1255 return ret;
1256 }
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