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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[deliverable/linux.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 /*
429 * Increase the pending frames counter, so that later when a reply comes
430 * in and the counter is decreased - we don't start getting negative
431 * values.
432 * Note that we don't need to make sure it isn't agg'd, since we're
433 * TXing non-sta
434 */
435 atomic_inc(&mvm->pending_frames[sta_id]);
436
437 return 0;
438 }
439
440 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb_gso,
441 struct ieee80211_sta *sta,
442 struct sk_buff_head *mpdus_skb)
443 {
444 struct sk_buff *tmp, *next;
445 char cb[sizeof(skb_gso->cb)];
446
447 memcpy(cb, skb_gso->cb, sizeof(cb));
448 next = skb_gso_segment(skb_gso, 0);
449 if (IS_ERR(next))
450 return -EINVAL;
451 else if (next)
452 consume_skb(skb_gso);
453
454 while (next) {
455 tmp = next;
456 next = tmp->next;
457 memcpy(tmp->cb, cb, sizeof(tmp->cb));
458
459 tmp->prev = NULL;
460 tmp->next = NULL;
461
462 __skb_queue_tail(mpdus_skb, tmp);
463 }
464
465 return 0;
466 }
467
468 /*
469 * Sets the fields in the Tx cmd that are crypto related
470 */
471 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
472 struct ieee80211_sta *sta)
473 {
474 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
475 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
476 struct iwl_mvm_sta *mvmsta;
477 struct iwl_device_cmd *dev_cmd;
478 struct iwl_tx_cmd *tx_cmd;
479 __le16 fc;
480 u16 seq_number = 0;
481 u8 tid = IWL_MAX_TID_COUNT;
482 u8 txq_id = info->hw_queue;
483 bool is_data_qos = false, is_ampdu = false;
484 int hdrlen;
485
486 mvmsta = iwl_mvm_sta_from_mac80211(sta);
487 fc = hdr->frame_control;
488 hdrlen = ieee80211_hdrlen(fc);
489
490 if (WARN_ON_ONCE(!mvmsta))
491 return -1;
492
493 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
494 return -1;
495
496 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, hdrlen, sta, mvmsta->sta_id);
497 if (!dev_cmd)
498 goto drop;
499
500 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
501 /* From now on, we cannot access info->control */
502
503 /*
504 * we handle that entirely ourselves -- for uAPSD the firmware
505 * will always send a notification, and for PS-Poll responses
506 * we'll notify mac80211 when getting frame status
507 */
508 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
509
510 spin_lock(&mvmsta->lock);
511
512 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
513 u8 *qc = NULL;
514 qc = ieee80211_get_qos_ctl(hdr);
515 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
516 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
517 goto drop_unlock_sta;
518
519 seq_number = mvmsta->tid_data[tid].seq_number;
520 seq_number &= IEEE80211_SCTL_SEQ;
521 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
522 hdr->seq_ctrl |= cpu_to_le16(seq_number);
523 is_data_qos = true;
524 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
525 }
526
527 /* Copy MAC header from skb into command buffer */
528 memcpy(tx_cmd->hdr, hdr, hdrlen);
529
530 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
531
532 if (sta->tdls) {
533 /* default to TID 0 for non-QoS packets */
534 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
535
536 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
537 }
538
539 if (is_ampdu) {
540 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
541 goto drop_unlock_sta;
542 txq_id = mvmsta->tid_data[tid].txq_id;
543 }
544
545 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
546 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
547
548 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
549 goto drop_unlock_sta;
550
551 if (is_data_qos && !ieee80211_has_morefrags(fc))
552 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
553
554 spin_unlock(&mvmsta->lock);
555
556 if (txq_id < mvm->first_agg_queue)
557 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
558
559 return 0;
560
561 drop_unlock_sta:
562 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
563 spin_unlock(&mvmsta->lock);
564 drop:
565 return -1;
566 }
567
568 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
569 struct ieee80211_sta *sta)
570 {
571 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
572 struct sk_buff_head mpdus_skbs;
573 unsigned int payload_len;
574 int ret;
575
576 if (WARN_ON_ONCE(!mvmsta))
577 return -1;
578
579 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
580 return -1;
581
582 if (!skb_is_gso(skb))
583 return iwl_mvm_tx_mpdu(mvm, skb, sta);
584
585 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
586 tcp_hdrlen(skb) + skb->data_len;
587
588 if (payload_len <= skb_shinfo(skb)->gso_size)
589 return iwl_mvm_tx_mpdu(mvm, skb, sta);
590
591 __skb_queue_head_init(&mpdus_skbs);
592
593 ret = iwl_mvm_tx_tso(mvm, skb, sta, &mpdus_skbs);
594 if (ret)
595 return ret;
596
597 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
598 return ret;
599
600 while (!skb_queue_empty(&mpdus_skbs)) {
601 struct sk_buff *skb = __skb_dequeue(&mpdus_skbs);
602
603 ret = iwl_mvm_tx_mpdu(mvm, skb, sta);
604 if (ret) {
605 __skb_queue_purge(&mpdus_skbs);
606 return ret;
607 }
608 }
609
610 return 0;
611 }
612
613 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
614 struct ieee80211_sta *sta, u8 tid)
615 {
616 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
617 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
618 struct ieee80211_vif *vif = mvmsta->vif;
619
620 lockdep_assert_held(&mvmsta->lock);
621
622 if ((tid_data->state == IWL_AGG_ON ||
623 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
624 iwl_mvm_tid_queued(tid_data) == 0) {
625 /*
626 * Now that this aggregation queue is empty tell mac80211 so it
627 * knows we no longer have frames buffered for the station on
628 * this TID (for the TIM bitmap calculation.)
629 */
630 ieee80211_sta_set_buffered(sta, tid, false);
631 }
632
633 if (tid_data->ssn != tid_data->next_reclaimed)
634 return;
635
636 switch (tid_data->state) {
637 case IWL_EMPTYING_HW_QUEUE_ADDBA:
638 IWL_DEBUG_TX_QUEUES(mvm,
639 "Can continue addBA flow ssn = next_recl = %d\n",
640 tid_data->next_reclaimed);
641 tid_data->state = IWL_AGG_STARTING;
642 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
643 break;
644
645 case IWL_EMPTYING_HW_QUEUE_DELBA:
646 IWL_DEBUG_TX_QUEUES(mvm,
647 "Can continue DELBA flow ssn = next_recl = %d\n",
648 tid_data->next_reclaimed);
649 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
650 vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
651 CMD_ASYNC);
652 tid_data->state = IWL_AGG_OFF;
653 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
654 break;
655
656 default:
657 break;
658 }
659 }
660
661 #ifdef CONFIG_IWLWIFI_DEBUG
662 const char *iwl_mvm_get_tx_fail_reason(u32 status)
663 {
664 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
665 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
666
667 switch (status & TX_STATUS_MSK) {
668 case TX_STATUS_SUCCESS:
669 return "SUCCESS";
670 TX_STATUS_POSTPONE(DELAY);
671 TX_STATUS_POSTPONE(FEW_BYTES);
672 TX_STATUS_POSTPONE(BT_PRIO);
673 TX_STATUS_POSTPONE(QUIET_PERIOD);
674 TX_STATUS_POSTPONE(CALC_TTAK);
675 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
676 TX_STATUS_FAIL(SHORT_LIMIT);
677 TX_STATUS_FAIL(LONG_LIMIT);
678 TX_STATUS_FAIL(UNDERRUN);
679 TX_STATUS_FAIL(DRAIN_FLOW);
680 TX_STATUS_FAIL(RFKILL_FLUSH);
681 TX_STATUS_FAIL(LIFE_EXPIRE);
682 TX_STATUS_FAIL(DEST_PS);
683 TX_STATUS_FAIL(HOST_ABORTED);
684 TX_STATUS_FAIL(BT_RETRY);
685 TX_STATUS_FAIL(STA_INVALID);
686 TX_STATUS_FAIL(FRAG_DROPPED);
687 TX_STATUS_FAIL(TID_DISABLE);
688 TX_STATUS_FAIL(FIFO_FLUSHED);
689 TX_STATUS_FAIL(SMALL_CF_POLL);
690 TX_STATUS_FAIL(FW_DROP);
691 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
692 }
693
694 return "UNKNOWN";
695
696 #undef TX_STATUS_FAIL
697 #undef TX_STATUS_POSTPONE
698 }
699 #endif /* CONFIG_IWLWIFI_DEBUG */
700
701 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
702 enum ieee80211_band band,
703 struct ieee80211_tx_rate *r)
704 {
705 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
706 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
707 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
708 case RATE_MCS_CHAN_WIDTH_20:
709 break;
710 case RATE_MCS_CHAN_WIDTH_40:
711 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
712 break;
713 case RATE_MCS_CHAN_WIDTH_80:
714 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
715 break;
716 case RATE_MCS_CHAN_WIDTH_160:
717 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
718 break;
719 }
720 if (rate_n_flags & RATE_MCS_SGI_MSK)
721 r->flags |= IEEE80211_TX_RC_SHORT_GI;
722 if (rate_n_flags & RATE_MCS_HT_MSK) {
723 r->flags |= IEEE80211_TX_RC_MCS;
724 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
725 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
726 ieee80211_rate_set_vht(
727 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
728 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
729 RATE_VHT_MCS_NSS_POS) + 1);
730 r->flags |= IEEE80211_TX_RC_VHT_MCS;
731 } else {
732 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
733 band);
734 }
735 }
736
737 /**
738 * translate ucode response to mac80211 tx status control values
739 */
740 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
741 struct ieee80211_tx_info *info)
742 {
743 struct ieee80211_tx_rate *r = &info->status.rates[0];
744
745 info->status.antenna =
746 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
747 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
748 }
749
750 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
751 u32 status)
752 {
753 struct iwl_fw_dbg_trigger_tlv *trig;
754 struct iwl_fw_dbg_trigger_tx_status *status_trig;
755 int i;
756
757 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
758 return;
759
760 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
761 status_trig = (void *)trig->data;
762
763 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
764 return;
765
766 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
767 /* don't collect on status 0 */
768 if (!status_trig->statuses[i].status)
769 break;
770
771 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
772 continue;
773
774 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
775 "Tx status %d was received",
776 status & TX_STATUS_MSK);
777 break;
778 }
779 }
780
781 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
782 struct iwl_rx_packet *pkt)
783 {
784 struct ieee80211_sta *sta;
785 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
786 int txq_id = SEQ_TO_QUEUE(sequence);
787 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
788 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
789 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
790 u32 status = le16_to_cpu(tx_resp->status.status);
791 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
792 struct iwl_mvm_sta *mvmsta;
793 struct sk_buff_head skbs;
794 u8 skb_freed = 0;
795 u16 next_reclaimed, seq_ctl;
796
797 __skb_queue_head_init(&skbs);
798
799 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
800
801 /* we can free until ssn % q.n_bd not inclusive */
802 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
803
804 while (!skb_queue_empty(&skbs)) {
805 struct sk_buff *skb = __skb_dequeue(&skbs);
806 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
807
808 skb_freed++;
809
810 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
811
812 memset(&info->status, 0, sizeof(info->status));
813
814 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
815
816 /* inform mac80211 about what happened with the frame */
817 switch (status & TX_STATUS_MSK) {
818 case TX_STATUS_SUCCESS:
819 case TX_STATUS_DIRECT_DONE:
820 info->flags |= IEEE80211_TX_STAT_ACK;
821 break;
822 case TX_STATUS_FAIL_DEST_PS:
823 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
824 break;
825 default:
826 break;
827 }
828
829 iwl_mvm_tx_status_check_trigger(mvm, status);
830
831 info->status.rates[0].count = tx_resp->failure_frame + 1;
832 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
833 info);
834 info->status.status_driver_data[1] =
835 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
836
837 /* Single frame failure in an AMPDU queue => send BAR */
838 if (txq_id >= mvm->first_agg_queue &&
839 !(info->flags & IEEE80211_TX_STAT_ACK) &&
840 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
841 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
842
843 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
844 if (status != TX_STATUS_SUCCESS) {
845 struct ieee80211_hdr *hdr = (void *)skb->data;
846 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
847 }
848
849 /*
850 * TODO: this is not accurate if we are freeing more than one
851 * packet.
852 */
853 info->status.tx_time =
854 le16_to_cpu(tx_resp->wireless_media_time);
855 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
856 info->status.status_driver_data[0] =
857 (void *)(uintptr_t)tx_resp->reduced_tpc;
858
859 ieee80211_tx_status(mvm->hw, skb);
860 }
861
862 if (txq_id >= mvm->first_agg_queue) {
863 /* If this is an aggregation queue, we use the ssn since:
864 * ssn = wifi seq_num % 256.
865 * The seq_ctl is the sequence control of the packet to which
866 * this Tx response relates. But if there is a hole in the
867 * bitmap of the BA we received, this Tx response may allow to
868 * reclaim the hole and all the subsequent packets that were
869 * already acked. In that case, seq_ctl != ssn, and the next
870 * packet to be reclaimed will be ssn and not seq_ctl. In that
871 * case, several packets will be reclaimed even if
872 * frame_count = 1.
873 *
874 * The ssn is the index (% 256) of the latest packet that has
875 * treated (acked / dropped) + 1.
876 */
877 next_reclaimed = ssn;
878 } else {
879 /* The next packet to be reclaimed is the one after this one */
880 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
881 }
882
883 IWL_DEBUG_TX_REPLY(mvm,
884 "TXQ %d status %s (0x%08x)\n",
885 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
886
887 IWL_DEBUG_TX_REPLY(mvm,
888 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
889 le32_to_cpu(tx_resp->initial_rate),
890 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
891 ssn, next_reclaimed, seq_ctl);
892
893 rcu_read_lock();
894
895 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
896 /*
897 * sta can't be NULL otherwise it'd mean that the sta has been freed in
898 * the firmware while we still have packets for it in the Tx queues.
899 */
900 if (WARN_ON_ONCE(!sta))
901 goto out;
902
903 if (!IS_ERR(sta)) {
904 mvmsta = iwl_mvm_sta_from_mac80211(sta);
905
906 if (tid != IWL_TID_NON_QOS) {
907 struct iwl_mvm_tid_data *tid_data =
908 &mvmsta->tid_data[tid];
909 bool send_eosp_ndp = false;
910
911 spin_lock_bh(&mvmsta->lock);
912 tid_data->next_reclaimed = next_reclaimed;
913 IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n",
914 next_reclaimed);
915 iwl_mvm_check_ratid_empty(mvm, sta, tid);
916
917 if (mvmsta->sleep_tx_count) {
918 mvmsta->sleep_tx_count--;
919 if (mvmsta->sleep_tx_count &&
920 !iwl_mvm_tid_queued(tid_data)) {
921 /*
922 * The number of frames in the queue
923 * dropped to 0 even if we sent less
924 * frames than we thought we had on the
925 * Tx queue.
926 * This means we had holes in the BA
927 * window that we just filled, ask
928 * mac80211 to send EOSP since the
929 * firmware won't know how to do that.
930 * Send NDP and the firmware will send
931 * EOSP notification that will trigger
932 * a call to ieee80211_sta_eosp().
933 */
934 send_eosp_ndp = true;
935 }
936 }
937
938 spin_unlock_bh(&mvmsta->lock);
939 if (send_eosp_ndp) {
940 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
941 IEEE80211_FRAME_RELEASE_UAPSD,
942 1, tid, false, false);
943 mvmsta->sleep_tx_count = 0;
944 ieee80211_send_eosp_nullfunc(sta, tid);
945 }
946 }
947
948 if (mvmsta->next_status_eosp) {
949 mvmsta->next_status_eosp = false;
950 ieee80211_sta_eosp(sta);
951 }
952 } else {
953 mvmsta = NULL;
954 }
955
956 /*
957 * If the txq is not an AMPDU queue, there is no chance we freed
958 * several skbs. Check that out...
959 */
960 if (txq_id >= mvm->first_agg_queue)
961 goto out;
962
963 /* We can't free more than one frame at once on a shared queue */
964 WARN_ON(skb_freed > 1);
965
966 /* If we have still frames for this STA nothing to do here */
967 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
968 goto out;
969
970 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
971
972 /*
973 * If there are no pending frames for this STA and
974 * the tx to this station is not disabled, notify
975 * mac80211 that this station can now wake up in its
976 * STA table.
977 * If mvmsta is not NULL, sta is valid.
978 */
979
980 spin_lock_bh(&mvmsta->lock);
981
982 if (!mvmsta->disable_tx)
983 ieee80211_sta_block_awake(mvm->hw, sta, false);
984
985 spin_unlock_bh(&mvmsta->lock);
986 }
987
988 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
989 /*
990 * We are draining and this was the last packet - pre_rcu_remove
991 * has been called already. We might be after the
992 * synchronize_net already.
993 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
994 */
995 set_bit(sta_id, mvm->sta_drained);
996 schedule_work(&mvm->sta_drained_wk);
997 }
998
999 out:
1000 rcu_read_unlock();
1001 }
1002
1003 #ifdef CONFIG_IWLWIFI_DEBUG
1004 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1005 static const char *iwl_get_agg_tx_status(u16 status)
1006 {
1007 switch (status & AGG_TX_STATE_STATUS_MSK) {
1008 AGG_TX_STATE_(TRANSMITTED);
1009 AGG_TX_STATE_(UNDERRUN);
1010 AGG_TX_STATE_(BT_PRIO);
1011 AGG_TX_STATE_(FEW_BYTES);
1012 AGG_TX_STATE_(ABORT);
1013 AGG_TX_STATE_(LAST_SENT_TTL);
1014 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1015 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1016 AGG_TX_STATE_(SCD_QUERY);
1017 AGG_TX_STATE_(TEST_BAD_CRC32);
1018 AGG_TX_STATE_(RESPONSE);
1019 AGG_TX_STATE_(DUMP_TX);
1020 AGG_TX_STATE_(DELAY_TX);
1021 }
1022
1023 return "UNKNOWN";
1024 }
1025
1026 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1027 struct iwl_rx_packet *pkt)
1028 {
1029 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1030 struct agg_tx_status *frame_status = &tx_resp->status;
1031 int i;
1032
1033 for (i = 0; i < tx_resp->frame_count; i++) {
1034 u16 fstatus = le16_to_cpu(frame_status[i].status);
1035
1036 IWL_DEBUG_TX_REPLY(mvm,
1037 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1038 iwl_get_agg_tx_status(fstatus),
1039 fstatus & AGG_TX_STATE_STATUS_MSK,
1040 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1041 AGG_TX_STATE_TRY_CNT_POS,
1042 le16_to_cpu(frame_status[i].sequence));
1043 }
1044 }
1045 #else
1046 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1047 struct iwl_rx_packet *pkt)
1048 {}
1049 #endif /* CONFIG_IWLWIFI_DEBUG */
1050
1051 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1052 struct iwl_rx_packet *pkt)
1053 {
1054 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1055 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1056 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1057 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1058 struct ieee80211_sta *sta;
1059
1060 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue))
1061 return;
1062
1063 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1064 return;
1065
1066 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1067
1068 rcu_read_lock();
1069
1070 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1071
1072 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1073 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1074 mvmsta->tid_data[tid].rate_n_flags =
1075 le32_to_cpu(tx_resp->initial_rate);
1076 mvmsta->tid_data[tid].tx_time =
1077 le16_to_cpu(tx_resp->wireless_media_time);
1078 }
1079
1080 rcu_read_unlock();
1081 }
1082
1083 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1084 {
1085 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1086 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1087
1088 if (tx_resp->frame_count == 1)
1089 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1090 else
1091 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1092 }
1093
1094 static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info,
1095 struct iwl_mvm_ba_notif *ba_notif,
1096 struct iwl_mvm_tid_data *tid_data)
1097 {
1098 info->flags |= IEEE80211_TX_STAT_AMPDU;
1099 info->status.ampdu_ack_len = ba_notif->txed_2_done;
1100 info->status.ampdu_len = ba_notif->txed;
1101 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
1102 info);
1103 /* TODO: not accounted if the whole A-MPDU failed */
1104 info->status.tx_time = tid_data->tx_time;
1105 info->status.status_driver_data[0] =
1106 (void *)(uintptr_t)ba_notif->reduced_txp;
1107 info->status.status_driver_data[1] =
1108 (void *)(uintptr_t)tid_data->rate_n_flags;
1109 }
1110
1111 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1112 {
1113 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1114 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
1115 struct sk_buff_head reclaimed_skbs;
1116 struct iwl_mvm_tid_data *tid_data;
1117 struct ieee80211_sta *sta;
1118 struct iwl_mvm_sta *mvmsta;
1119 struct sk_buff *skb;
1120 int sta_id, tid, freed;
1121 /* "flow" corresponds to Tx queue */
1122 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
1123 /* "ssn" is start of block-ack Tx window, corresponds to index
1124 * (in Tx queue's circular buffer) of first TFD/frame in window */
1125 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
1126
1127 sta_id = ba_notif->sta_id;
1128 tid = ba_notif->tid;
1129
1130 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1131 tid >= IWL_MAX_TID_COUNT,
1132 "sta_id %d tid %d", sta_id, tid))
1133 return;
1134
1135 rcu_read_lock();
1136
1137 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1138
1139 /* Reclaiming frames for a station that has been deleted ? */
1140 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1141 rcu_read_unlock();
1142 return;
1143 }
1144
1145 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1146 tid_data = &mvmsta->tid_data[tid];
1147
1148 if (tid_data->txq_id != scd_flow) {
1149 IWL_ERR(mvm,
1150 "invalid BA notification: Q %d, tid %d, flow %d\n",
1151 tid_data->txq_id, tid, scd_flow);
1152 rcu_read_unlock();
1153 return;
1154 }
1155
1156 spin_lock_bh(&mvmsta->lock);
1157
1158 __skb_queue_head_init(&reclaimed_skbs);
1159
1160 /*
1161 * Release all TFDs before the SSN, i.e. all TFDs in front of
1162 * block-ack window (we assume that they've been successfully
1163 * transmitted ... if not, it's too late anyway).
1164 */
1165 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
1166 &reclaimed_skbs);
1167
1168 IWL_DEBUG_TX_REPLY(mvm,
1169 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1170 (u8 *)&ba_notif->sta_addr_lo32,
1171 ba_notif->sta_id);
1172 IWL_DEBUG_TX_REPLY(mvm,
1173 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1174 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1175 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
1176 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
1177 ba_notif->txed_2_done);
1178
1179 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1180 ba_notif->reduced_txp);
1181 tid_data->next_reclaimed = ba_resp_scd_ssn;
1182
1183 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1184
1185 freed = 0;
1186
1187 skb_queue_walk(&reclaimed_skbs, skb) {
1188 struct ieee80211_hdr *hdr = (void *)skb->data;
1189 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1190
1191 if (ieee80211_is_data_qos(hdr->frame_control))
1192 freed++;
1193 else
1194 WARN_ON_ONCE(1);
1195
1196 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1197
1198 memset(&info->status, 0, sizeof(info->status));
1199 /* Packet was transmitted successfully, failures come as single
1200 * frames because before failing a frame the firmware transmits
1201 * it without aggregation at least once.
1202 */
1203 info->flags |= IEEE80211_TX_STAT_ACK;
1204
1205 /* this is the first skb we deliver in this batch */
1206 /* put the rate scaling data there */
1207 if (freed == 1)
1208 iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data);
1209 }
1210
1211 spin_unlock_bh(&mvmsta->lock);
1212
1213 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1214 * possible (i.e. first MPDU in the aggregation wasn't acked)
1215 * Still it's important to update RS about sent vs. acked.
1216 */
1217 if (skb_queue_empty(&reclaimed_skbs)) {
1218 struct ieee80211_tx_info ba_info = {};
1219 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1220
1221 if (mvmsta->vif)
1222 chanctx_conf =
1223 rcu_dereference(mvmsta->vif->chanctx_conf);
1224
1225 if (WARN_ON_ONCE(!chanctx_conf))
1226 goto out;
1227
1228 ba_info.band = chanctx_conf->def.chan->band;
1229 iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data);
1230
1231 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1232 iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info);
1233 }
1234
1235 out:
1236 rcu_read_unlock();
1237
1238 while (!skb_queue_empty(&reclaimed_skbs)) {
1239 skb = __skb_dequeue(&reclaimed_skbs);
1240 ieee80211_tx_status(mvm->hw, skb);
1241 }
1242 }
1243
1244 /*
1245 * Note that there are transports that buffer frames before they reach
1246 * the firmware. This means that after flush_tx_path is called, the
1247 * queue might not be empty. The race-free way to handle this is to:
1248 * 1) set the station as draining
1249 * 2) flush the Tx path
1250 * 3) wait for the transport queues to be empty
1251 */
1252 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1253 {
1254 int ret;
1255 struct iwl_tx_path_flush_cmd flush_cmd = {
1256 .queues_ctl = cpu_to_le32(tfd_msk),
1257 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1258 };
1259
1260 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1261 sizeof(flush_cmd), &flush_cmd);
1262 if (ret)
1263 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1264 return ret;
1265 }
Linux kernel - Deliverables
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