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ARM: mm: Recreate kernel mappings in early_paging_init()
[linux/fpc-iii.git] / drivers / net / wireless / iwlwifi / dvm / tx.c
blobda442b81370a769054b4b77a946daa4bbd856ed8
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2013 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19 * USA
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 *****************************************************************************/
29
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/sched.h>
34 #include <linux/ieee80211.h>
35 #include "iwl-io.h"
36 #include "iwl-trans.h"
37 #include "iwl-agn-hw.h"
38 #include "dev.h"
39 #include "agn.h"
40
41 static const u8 tid_to_ac[] = {
42 IEEE80211_AC_BE,
43 IEEE80211_AC_BK,
44 IEEE80211_AC_BK,
45 IEEE80211_AC_BE,
46 IEEE80211_AC_VI,
47 IEEE80211_AC_VI,
48 IEEE80211_AC_VO,
49 IEEE80211_AC_VO,
50 };
51
52 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
53 struct ieee80211_tx_info *info,
54 __le16 fc, __le32 *tx_flags)
55 {
56 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
57 info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT ||
58 info->flags & IEEE80211_TX_CTL_AMPDU)
59 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
60 }
61
62 /*
63 * handle build REPLY_TX command notification.
64 */
65 static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv,
66 struct sk_buff *skb,
67 struct iwl_tx_cmd *tx_cmd,
68 struct ieee80211_tx_info *info,
69 struct ieee80211_hdr *hdr, u8 sta_id)
70 {
71 __le16 fc = hdr->frame_control;
72 __le32 tx_flags = tx_cmd->tx_flags;
73
74 tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
75
76 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
77 tx_flags |= TX_CMD_FLG_ACK_MSK;
78 else
79 tx_flags &= ~TX_CMD_FLG_ACK_MSK;
80
81 if (ieee80211_is_probe_resp(fc))
82 tx_flags |= TX_CMD_FLG_TSF_MSK;
83 else if (ieee80211_is_back_req(fc))
84 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
85 else if (info->band == IEEE80211_BAND_2GHZ &&
86 priv->lib->bt_params &&
87 priv->lib->bt_params->advanced_bt_coexist &&
88 (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) ||
89 ieee80211_is_reassoc_req(fc) ||
90 info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO))
91 tx_flags |= TX_CMD_FLG_IGNORE_BT;
92
93
94 tx_cmd->sta_id = sta_id;
95 if (ieee80211_has_morefrags(fc))
96 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
97
98 if (ieee80211_is_data_qos(fc)) {
99 u8 *qc = ieee80211_get_qos_ctl(hdr);
100 tx_cmd->tid_tspec = qc[0] & 0xf;
101 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
102 } else {
103 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
104 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
105 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
106 else
107 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
108 }
109
110 iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags);
111
112 tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
113 if (ieee80211_is_mgmt(fc)) {
114 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
115 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
116 else
117 tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
118 } else {
119 tx_cmd->timeout.pm_frame_timeout = 0;
120 }
121
122 tx_cmd->driver_txop = 0;
123 tx_cmd->tx_flags = tx_flags;
124 tx_cmd->next_frame_len = 0;
125 }
126
127 static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv,
128 struct iwl_tx_cmd *tx_cmd,
129 struct ieee80211_tx_info *info,
130 struct ieee80211_sta *sta,
131 __le16 fc)
132 {
133 u32 rate_flags;
134 int rate_idx;
135 u8 rts_retry_limit;
136 u8 data_retry_limit;
137 u8 rate_plcp;
138
139 if (priv->wowlan) {
140 rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
141 data_retry_limit = IWLAGN_LOW_RETRY_LIMIT;
142 } else {
143 /* Set retry limit on RTS packets */
144 rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT;
145
146 /* Set retry limit on DATA packets and Probe Responses*/
147 if (ieee80211_is_probe_resp(fc)) {
148 data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT;
149 rts_retry_limit =
150 min(data_retry_limit, rts_retry_limit);
151 } else if (ieee80211_is_back_req(fc))
152 data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT;
153 else
154 data_retry_limit = IWLAGN_DEFAULT_TX_RETRY;
155 }
156
157 tx_cmd->data_retry_limit = data_retry_limit;
158 tx_cmd->rts_retry_limit = rts_retry_limit;
159
160 /* DATA packets will use the uCode station table for rate/antenna
161 * selection */
162 if (ieee80211_is_data(fc)) {
163 tx_cmd->initial_rate_index = 0;
164 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
165 return;
166 } else if (ieee80211_is_back_req(fc))
167 tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
168
169 /**
170 * If the current TX rate stored in mac80211 has the MCS bit set, it's
171 * not really a TX rate. Thus, we use the lowest supported rate for
172 * this band. Also use the lowest supported rate if the stored rate
173 * index is invalid.
174 */
175 rate_idx = info->control.rates[0].idx;
176 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS ||
177 (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY))
178 rate_idx = rate_lowest_index(
179 &priv->nvm_data->bands[info->band], sta);
180 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
181 if (info->band == IEEE80211_BAND_5GHZ)
182 rate_idx += IWL_FIRST_OFDM_RATE;
183 /* Get PLCP rate for tx_cmd->rate_n_flags */
184 rate_plcp = iwl_rates[rate_idx].plcp;
185 /* Zero out flags for this packet */
186 rate_flags = 0;
187
188 /* Set CCK flag as needed */
189 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
190 rate_flags |= RATE_MCS_CCK_MSK;
191
192 /* Set up antennas */
193 if (priv->lib->bt_params &&
194 priv->lib->bt_params->advanced_bt_coexist &&
195 priv->bt_full_concurrent) {
196 /* operated as 1x1 in full concurrency mode */
197 priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
198 first_antenna(priv->nvm_data->valid_tx_ant));
199 } else
200 priv->mgmt_tx_ant = iwl_toggle_tx_ant(
201 priv, priv->mgmt_tx_ant,
202 priv->nvm_data->valid_tx_ant);
203 rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
204
205 /* Set the rate in the TX cmd */
206 tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags);
207 }
208
209 static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv,
210 struct ieee80211_tx_info *info,
211 struct iwl_tx_cmd *tx_cmd,
212 struct sk_buff *skb_frag)
213 {
214 struct ieee80211_key_conf *keyconf = info->control.hw_key;
215
216 switch (keyconf->cipher) {
217 case WLAN_CIPHER_SUITE_CCMP:
218 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
219 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
220 if (info->flags & IEEE80211_TX_CTL_AMPDU)
221 tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
222 break;
223
224 case WLAN_CIPHER_SUITE_TKIP:
225 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
226 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
227 break;
228
229 case WLAN_CIPHER_SUITE_WEP104:
230 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
231 /* fall through */
232 case WLAN_CIPHER_SUITE_WEP40:
233 tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP |
234 (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT);
235
236 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
237
238 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
239 "with key %d\n", keyconf->keyidx);
240 break;
241
242 default:
243 IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher);
244 break;
245 }
246 }
247
248 /**
249 * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
250 * @context: the current context
251 * @sta: mac80211 station
252 *
253 * In certain circumstances mac80211 passes a station pointer
254 * that may be %NULL, for example during TX or key setup. In
255 * that case, we need to use the broadcast station, so this
256 * inline wraps that pattern.
257 */
258 static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context,
259 struct ieee80211_sta *sta)
260 {
261 int sta_id;
262
263 if (!sta)
264 return context->bcast_sta_id;
265
266 sta_id = iwl_sta_id(sta);
267
268 /*
269 * mac80211 should not be passing a partially
270 * initialised station!
271 */
272 WARN_ON(sta_id == IWL_INVALID_STATION);
273
274 return sta_id;
275 }
276
277 /*
278 * start REPLY_TX command process
279 */
280 int iwlagn_tx_skb(struct iwl_priv *priv,
281 struct ieee80211_sta *sta,
282 struct sk_buff *skb)
283 {
284 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
285 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
286 struct iwl_station_priv *sta_priv = NULL;
287 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
288 struct iwl_device_cmd *dev_cmd;
289 struct iwl_tx_cmd *tx_cmd;
290 __le16 fc;
291 u8 hdr_len;
292 u16 len, seq_number = 0;
293 u8 sta_id, tid = IWL_MAX_TID_COUNT;
294 bool is_agg = false, is_data_qos = false;
295 int txq_id;
296
297 if (info->control.vif)
298 ctx = iwl_rxon_ctx_from_vif(info->control.vif);
299
300 if (iwl_is_rfkill(priv)) {
301 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
302 goto drop_unlock_priv;
303 }
304
305 fc = hdr->frame_control;
306
307 #ifdef CONFIG_IWLWIFI_DEBUG
308 if (ieee80211_is_auth(fc))
309 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
310 else if (ieee80211_is_assoc_req(fc))
311 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
312 else if (ieee80211_is_reassoc_req(fc))
313 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
314 #endif
315
316 if (unlikely(ieee80211_is_probe_resp(fc))) {
317 struct iwl_wipan_noa_data *noa_data =
318 rcu_dereference(priv->noa_data);
319
320 if (noa_data &&
321 pskb_expand_head(skb, 0, noa_data->length,
322 GFP_ATOMIC) == 0) {
323 memcpy(skb_put(skb, noa_data->length),
324 noa_data->data, noa_data->length);
325 hdr = (struct ieee80211_hdr *)skb->data;
326 }
327 }
328
329 hdr_len = ieee80211_hdrlen(fc);
330
331 /* For management frames use broadcast id to do not break aggregation */
332 if (!ieee80211_is_data(fc))
333 sta_id = ctx->bcast_sta_id;
334 else {
335 /* Find index into station table for destination station */
336 sta_id = iwl_sta_id_or_broadcast(ctx, sta);
337 if (sta_id == IWL_INVALID_STATION) {
338 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
339 hdr->addr1);
340 goto drop_unlock_priv;
341 }
342 }
343
344 if (sta)
345 sta_priv = (void *)sta->drv_priv;
346
347 if (sta_priv && sta_priv->asleep &&
348 (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
349 /*
350 * This sends an asynchronous command to the device,
351 * but we can rely on it being processed before the
352 * next frame is processed -- and the next frame to
353 * this station is the one that will consume this
354 * counter.
355 * For now set the counter to just 1 since we do not
356 * support uAPSD yet.
357 *
358 * FIXME: If we get two non-bufferable frames one
359 * after the other, we might only send out one of
360 * them because this is racy.
361 */
362 iwl_sta_modify_sleep_tx_count(priv, sta_id, 1);
363 }
364
365 dev_cmd = iwl_trans_alloc_tx_cmd(priv->trans);
366
367 if (unlikely(!dev_cmd))
368 goto drop_unlock_priv;
369
370 memset(dev_cmd, 0, sizeof(*dev_cmd));
371 tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload;
372
373 /* Total # bytes to be transmitted */
374 len = (u16)skb->len;
375 tx_cmd->len = cpu_to_le16(len);
376
377 if (info->control.hw_key)
378 iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb);
379
380 /* TODO need this for burst mode later on */
381 iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id);
382
383 iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, sta, fc);
384
385 memset(&info->status, 0, sizeof(info->status));
386
387 info->driver_data[0] = ctx;
388 info->driver_data[1] = dev_cmd;
389 /* From now on, we cannot access info->control */
390
391 spin_lock(&priv->sta_lock);
392
393 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
394 u8 *qc = NULL;
395 struct iwl_tid_data *tid_data;
396 qc = ieee80211_get_qos_ctl(hdr);
397 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
398 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
399 goto drop_unlock_sta;
400 tid_data = &priv->tid_data[sta_id][tid];
401
402 /* aggregation is on for this <sta,tid> */
403 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
404 tid_data->agg.state != IWL_AGG_ON) {
405 IWL_ERR(priv, "TX_CTL_AMPDU while not in AGG:"
406 " Tx flags = 0x%08x, agg.state = %d",
407 info->flags, tid_data->agg.state);
408 IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d",
409 sta_id, tid,
410 IEEE80211_SEQ_TO_SN(tid_data->seq_number));
411 goto drop_unlock_sta;
412 }
413
414 /* We can receive packets from the stack in IWL_AGG_{ON,OFF}
415 * only. Check this here.
416 */
417 if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON &&
418 tid_data->agg.state != IWL_AGG_OFF,
419 "Tx while agg.state = %d", tid_data->agg.state))
420 goto drop_unlock_sta;
421
422 seq_number = tid_data->seq_number;
423 seq_number &= IEEE80211_SCTL_SEQ;
424 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
425 hdr->seq_ctrl |= cpu_to_le16(seq_number);
426 seq_number += 0x10;
427
428 if (info->flags & IEEE80211_TX_CTL_AMPDU)
429 is_agg = true;
430 is_data_qos = true;
431 }
432
433 /* Copy MAC header from skb into command buffer */
434 memcpy(tx_cmd->hdr, hdr, hdr_len);
435
436 if (is_agg)
437 txq_id = priv->tid_data[sta_id][tid].agg.txq_id;
438 else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
439 /*
440 * Send this frame after DTIM -- there's a special queue
441 * reserved for this for contexts that support AP mode.
442 */
443 txq_id = ctx->mcast_queue;
444
445 /*
446 * The microcode will clear the more data
447 * bit in the last frame it transmits.
448 */
449 hdr->frame_control |=
450 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
451 } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN)
452 txq_id = IWL_AUX_QUEUE;
453 else
454 txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)];
455
456 WARN_ON_ONCE(!is_agg && txq_id != info->hw_queue);
457 WARN_ON_ONCE(is_agg &&
458 priv->queue_to_mac80211[txq_id] != info->hw_queue);
459
460 IWL_DEBUG_TX(priv, "TX to [%d|%d] Q:%d - seq: 0x%x\n", sta_id, tid,
461 txq_id, seq_number);
462
463 if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id))
464 goto drop_unlock_sta;
465
466 if (is_data_qos && !ieee80211_has_morefrags(fc))
467 priv->tid_data[sta_id][tid].seq_number = seq_number;
468
469 spin_unlock(&priv->sta_lock);
470
471 /*
472 * Avoid atomic ops if it isn't an associated client.
473 * Also, if this is a packet for aggregation, don't
474 * increase the counter because the ucode will stop
475 * aggregation queues when their respective station
476 * goes to sleep.
477 */
478 if (sta_priv && sta_priv->client && !is_agg)
479 atomic_inc(&sta_priv->pending_frames);
480
481 return 0;
482
483 drop_unlock_sta:
484 if (dev_cmd)
485 iwl_trans_free_tx_cmd(priv->trans, dev_cmd);
486 spin_unlock(&priv->sta_lock);
487 drop_unlock_priv:
488 return -1;
489 }
490
491 static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq)
492 {
493 int q;
494
495 for (q = IWLAGN_FIRST_AMPDU_QUEUE;
496 q < priv->cfg->base_params->num_of_queues; q++) {
497 if (!test_and_set_bit(q, priv->agg_q_alloc)) {
498 priv->queue_to_mac80211[q] = mq;
499 return q;
500 }
501 }
502
503 return -ENOSPC;
504 }
505
506 static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q)
507 {
508 clear_bit(q, priv->agg_q_alloc);
509 priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE;
510 }
511
512 int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif,
513 struct ieee80211_sta *sta, u16 tid)
514 {
515 struct iwl_tid_data *tid_data;
516 int sta_id, txq_id;
517 enum iwl_agg_state agg_state;
518
519 sta_id = iwl_sta_id(sta);
520
521 if (sta_id == IWL_INVALID_STATION) {
522 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
523 return -ENXIO;
524 }
525
526 spin_lock_bh(&priv->sta_lock);
527
528 tid_data = &priv->tid_data[sta_id][tid];
529 txq_id = tid_data->agg.txq_id;
530
531 switch (tid_data->agg.state) {
532 case IWL_EMPTYING_HW_QUEUE_ADDBA:
533 /*
534 * This can happen if the peer stops aggregation
535 * again before we've had a chance to drain the
536 * queue we selected previously, i.e. before the
537 * session was really started completely.
538 */
539 IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
540 goto turn_off;
541 case IWL_AGG_STARTING:
542 /*
543 * This can happen when the session is stopped before
544 * we receive ADDBA response
545 */
546 IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n");
547 goto turn_off;
548 case IWL_AGG_ON:
549 break;
550 default:
551 IWL_WARN(priv,
552 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
553 sta_id, tid, tid_data->agg.state);
554 spin_unlock_bh(&priv->sta_lock);
555 return 0;
556 }
557
558 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
559
560 /* There are still packets for this RA / TID in the HW */
561 if (!test_bit(txq_id, priv->agg_q_alloc)) {
562 IWL_DEBUG_TX_QUEUES(priv,
563 "stopping AGG on STA/TID %d/%d but hwq %d not used\n",
564 sta_id, tid, txq_id);
565 } else if (tid_data->agg.ssn != tid_data->next_reclaimed) {
566 IWL_DEBUG_TX_QUEUES(priv,
567 "Can't proceed: ssn %d, next_recl = %d\n",
568 tid_data->agg.ssn,
569 tid_data->next_reclaimed);
570 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_DELBA;
571 spin_unlock_bh(&priv->sta_lock);
572 return 0;
573 }
574
575 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
576 tid_data->agg.ssn);
577 turn_off:
578 agg_state = tid_data->agg.state;
579 tid_data->agg.state = IWL_AGG_OFF;
580
581 spin_unlock_bh(&priv->sta_lock);
582
583 if (test_bit(txq_id, priv->agg_q_alloc)) {
584 /*
585 * If the transport didn't know that we wanted to start
586 * agreggation, don't tell it that we want to stop them.
587 * This can happen when we don't get the addBA response on
588 * time, or we hadn't time to drain the AC queues.
589 */
590 if (agg_state == IWL_AGG_ON)
591 iwl_trans_txq_disable(priv->trans, txq_id);
592 else
593 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
594 agg_state);
595 iwlagn_dealloc_agg_txq(priv, txq_id);
596 }
597
598 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
599
600 return 0;
601 }
602
603 int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
604 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
605 {
606 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
607 struct iwl_tid_data *tid_data;
608 int sta_id, txq_id, ret;
609
610 IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
611 sta->addr, tid);
612
613 sta_id = iwl_sta_id(sta);
614 if (sta_id == IWL_INVALID_STATION) {
615 IWL_ERR(priv, "Start AGG on invalid station\n");
616 return -ENXIO;
617 }
618 if (unlikely(tid >= IWL_MAX_TID_COUNT))
619 return -EINVAL;
620
621 if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
622 IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
623 return -ENXIO;
624 }
625
626 txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]);
627 if (txq_id < 0) {
628 IWL_DEBUG_TX_QUEUES(priv,
629 "No free aggregation queue for %pM/%d\n",
630 sta->addr, tid);
631 return txq_id;
632 }
633
634 ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
635 if (ret)
636 return ret;
637
638 spin_lock_bh(&priv->sta_lock);
639 tid_data = &priv->tid_data[sta_id][tid];
640 tid_data->agg.ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
641 tid_data->agg.txq_id = txq_id;
642
643 *ssn = tid_data->agg.ssn;
644
645 if (*ssn == tid_data->next_reclaimed) {
646 IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n",
647 tid_data->agg.ssn);
648 tid_data->agg.state = IWL_AGG_STARTING;
649 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
650 } else {
651 IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
652 "next_reclaimed = %d\n",
653 tid_data->agg.ssn,
654 tid_data->next_reclaimed);
655 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
656 }
657 spin_unlock_bh(&priv->sta_lock);
658
659 return ret;
660 }
661
662 int iwlagn_tx_agg_flush(struct iwl_priv *priv, struct ieee80211_vif *vif,
663 struct ieee80211_sta *sta, u16 tid)
664 {
665 struct iwl_tid_data *tid_data;
666 enum iwl_agg_state agg_state;
667 int sta_id, txq_id;
668 sta_id = iwl_sta_id(sta);
669
670 /*
671 * First set the agg state to OFF to avoid calling
672 * ieee80211_stop_tx_ba_cb in iwlagn_check_ratid_empty.
673 */
674 spin_lock_bh(&priv->sta_lock);
675
676 tid_data = &priv->tid_data[sta_id][tid];
677 txq_id = tid_data->agg.txq_id;
678 agg_state = tid_data->agg.state;
679 IWL_DEBUG_TX_QUEUES(priv, "Flush AGG: sta %d tid %d q %d state %d\n",
680 sta_id, tid, txq_id, tid_data->agg.state);
681
682 tid_data->agg.state = IWL_AGG_OFF;
683
684 spin_unlock_bh(&priv->sta_lock);
685
686 if (iwlagn_txfifo_flush(priv, BIT(txq_id)))
687 IWL_ERR(priv, "Couldn't flush the AGG queue\n");
688
689 if (test_bit(txq_id, priv->agg_q_alloc)) {
690 /*
691 * If the transport didn't know that we wanted to start
692 * agreggation, don't tell it that we want to stop them.
693 * This can happen when we don't get the addBA response on
694 * time, or we hadn't time to drain the AC queues.
695 */
696 if (agg_state == IWL_AGG_ON)
697 iwl_trans_txq_disable(priv->trans, txq_id);
698 else
699 IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n",
700 agg_state);
701 iwlagn_dealloc_agg_txq(priv, txq_id);
702 }
703
704 return 0;
705 }
706
707 int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif,
708 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
709 {
710 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
711 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
712 int q, fifo;
713 u16 ssn;
714
715 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
716
717 spin_lock_bh(&priv->sta_lock);
718 ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn;
719 q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id;
720 priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON;
721 spin_unlock_bh(&priv->sta_lock);
722
723 fifo = ctx->ac_to_fifo[tid_to_ac[tid]];
724
725 iwl_trans_txq_enable(priv->trans, q, fifo, sta_priv->sta_id, tid,
726 buf_size, ssn);
727
728 /*
729 * If the limit is 0, then it wasn't initialised yet,
730 * use the default. We can do that since we take the
731 * minimum below, and we don't want to go above our
732 * default due to hardware restrictions.
733 */
734 if (sta_priv->max_agg_bufsize == 0)
735 sta_priv->max_agg_bufsize =
736 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
737
738 /*
739 * Even though in theory the peer could have different
740 * aggregation reorder buffer sizes for different sessions,
741 * our ucode doesn't allow for that and has a global limit
742 * for each station. Therefore, use the minimum of all the
743 * aggregation sessions and our default value.
744 */
745 sta_priv->max_agg_bufsize =
746 min(sta_priv->max_agg_bufsize, buf_size);
747
748 if (priv->hw_params.use_rts_for_aggregation) {
749 /*
750 * switch to RTS/CTS if it is the prefer protection
751 * method for HT traffic
752 */
753
754 sta_priv->lq_sta.lq.general_params.flags |=
755 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
756 }
757 priv->agg_tids_count++;
758 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
759 priv->agg_tids_count);
760
761 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
762 sta_priv->max_agg_bufsize;
763
764 IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
765 sta->addr, tid);
766
767 return iwl_send_lq_cmd(priv, ctx,
768 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
769 }
770
771 static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid)
772 {
773 struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid];
774 enum iwl_rxon_context_id ctx;
775 struct ieee80211_vif *vif;
776 u8 *addr;
777
778 lockdep_assert_held(&priv->sta_lock);
779
780 addr = priv->stations[sta_id].sta.sta.addr;
781 ctx = priv->stations[sta_id].ctxid;
782 vif = priv->contexts[ctx].vif;
783
784 switch (priv->tid_data[sta_id][tid].agg.state) {
785 case IWL_EMPTYING_HW_QUEUE_DELBA:
786 /* There are no packets for this RA / TID in the HW any more */
787 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
788 IWL_DEBUG_TX_QUEUES(priv,
789 "Can continue DELBA flow ssn = next_recl ="
790 " %d", tid_data->next_reclaimed);
791 iwl_trans_txq_disable(priv->trans,
792 tid_data->agg.txq_id);
793 iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id);
794 tid_data->agg.state = IWL_AGG_OFF;
795 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
796 }
797 break;
798 case IWL_EMPTYING_HW_QUEUE_ADDBA:
799 /* There are no packets for this RA / TID in the HW any more */
800 if (tid_data->agg.ssn == tid_data->next_reclaimed) {
801 IWL_DEBUG_TX_QUEUES(priv,
802 "Can continue ADDBA flow ssn = next_recl ="
803 " %d", tid_data->next_reclaimed);
804 tid_data->agg.state = IWL_AGG_STARTING;
805 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
806 }
807 break;
808 default:
809 break;
810 }
811 }
812
813 static void iwlagn_non_agg_tx_status(struct iwl_priv *priv,
814 struct iwl_rxon_context *ctx,
815 const u8 *addr1)
816 {
817 struct ieee80211_sta *sta;
818 struct iwl_station_priv *sta_priv;
819
820 rcu_read_lock();
821 sta = ieee80211_find_sta(ctx->vif, addr1);
822 if (sta) {
823 sta_priv = (void *)sta->drv_priv;
824 /* avoid atomic ops if this isn't a client */
825 if (sta_priv->client &&
826 atomic_dec_return(&sta_priv->pending_frames) == 0)
827 ieee80211_sta_block_awake(priv->hw, sta, false);
828 }
829 rcu_read_unlock();
830 }
831
832 /**
833 * translate ucode response to mac80211 tx status control values
834 */
835 static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
836 struct ieee80211_tx_info *info)
837 {
838 struct ieee80211_tx_rate *r = &info->status.rates[0];
839
840 info->status.antenna =
841 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
842 if (rate_n_flags & RATE_MCS_HT_MSK)
843 r->flags |= IEEE80211_TX_RC_MCS;
844 if (rate_n_flags & RATE_MCS_GF_MSK)
845 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
846 if (rate_n_flags & RATE_MCS_HT40_MSK)
847 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
848 if (rate_n_flags & RATE_MCS_DUP_MSK)
849 r->flags |= IEEE80211_TX_RC_DUP_DATA;
850 if (rate_n_flags & RATE_MCS_SGI_MSK)
851 r->flags |= IEEE80211_TX_RC_SHORT_GI;
852 r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band);
853 }
854
855 #ifdef CONFIG_IWLWIFI_DEBUG
856 const char *iwl_get_tx_fail_reason(u32 status)
857 {
858 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
859 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
860
861 switch (status & TX_STATUS_MSK) {
862 case TX_STATUS_SUCCESS:
863 return "SUCCESS";
864 TX_STATUS_POSTPONE(DELAY);
865 TX_STATUS_POSTPONE(FEW_BYTES);
866 TX_STATUS_POSTPONE(BT_PRIO);
867 TX_STATUS_POSTPONE(QUIET_PERIOD);
868 TX_STATUS_POSTPONE(CALC_TTAK);
869 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
870 TX_STATUS_FAIL(SHORT_LIMIT);
871 TX_STATUS_FAIL(LONG_LIMIT);
872 TX_STATUS_FAIL(FIFO_UNDERRUN);
873 TX_STATUS_FAIL(DRAIN_FLOW);
874 TX_STATUS_FAIL(RFKILL_FLUSH);
875 TX_STATUS_FAIL(LIFE_EXPIRE);
876 TX_STATUS_FAIL(DEST_PS);
877 TX_STATUS_FAIL(HOST_ABORTED);
878 TX_STATUS_FAIL(BT_RETRY);
879 TX_STATUS_FAIL(STA_INVALID);
880 TX_STATUS_FAIL(FRAG_DROPPED);
881 TX_STATUS_FAIL(TID_DISABLE);
882 TX_STATUS_FAIL(FIFO_FLUSHED);
883 TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
884 TX_STATUS_FAIL(PASSIVE_NO_RX);
885 TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
886 }
887
888 return "UNKNOWN";
889
890 #undef TX_STATUS_FAIL
891 #undef TX_STATUS_POSTPONE
892 }
893 #endif /* CONFIG_IWLWIFI_DEBUG */
894
895 static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
896 {
897 status &= AGG_TX_STATUS_MSK;
898
899 switch (status) {
900 case AGG_TX_STATE_UNDERRUN_MSK:
901 priv->reply_agg_tx_stats.underrun++;
902 break;
903 case AGG_TX_STATE_BT_PRIO_MSK:
904 priv->reply_agg_tx_stats.bt_prio++;
905 break;
906 case AGG_TX_STATE_FEW_BYTES_MSK:
907 priv->reply_agg_tx_stats.few_bytes++;
908 break;
909 case AGG_TX_STATE_ABORT_MSK:
910 priv->reply_agg_tx_stats.abort++;
911 break;
912 case AGG_TX_STATE_LAST_SENT_TTL_MSK:
913 priv->reply_agg_tx_stats.last_sent_ttl++;
914 break;
915 case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
916 priv->reply_agg_tx_stats.last_sent_try++;
917 break;
918 case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
919 priv->reply_agg_tx_stats.last_sent_bt_kill++;
920 break;
921 case AGG_TX_STATE_SCD_QUERY_MSK:
922 priv->reply_agg_tx_stats.scd_query++;
923 break;
924 case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
925 priv->reply_agg_tx_stats.bad_crc32++;
926 break;
927 case AGG_TX_STATE_RESPONSE_MSK:
928 priv->reply_agg_tx_stats.response++;
929 break;
930 case AGG_TX_STATE_DUMP_TX_MSK:
931 priv->reply_agg_tx_stats.dump_tx++;
932 break;
933 case AGG_TX_STATE_DELAY_TX_MSK:
934 priv->reply_agg_tx_stats.delay_tx++;
935 break;
936 default:
937 priv->reply_agg_tx_stats.unknown++;
938 break;
939 }
940 }
941
942 static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
943 {
944 return le32_to_cpup((__le32 *)&tx_resp->status +
945 tx_resp->frame_count) & IEEE80211_MAX_SN;
946 }
947
948 static void iwl_rx_reply_tx_agg(struct iwl_priv *priv,
949 struct iwlagn_tx_resp *tx_resp)
950 {
951 struct agg_tx_status *frame_status = &tx_resp->status;
952 int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
953 IWLAGN_TX_RES_TID_POS;
954 int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
955 IWLAGN_TX_RES_RA_POS;
956 struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg;
957 u32 status = le16_to_cpu(tx_resp->status.status);
958 int i;
959
960 WARN_ON(tid == IWL_TID_NON_QOS);
961
962 if (agg->wait_for_ba)
963 IWL_DEBUG_TX_REPLY(priv,
964 "got tx response w/o block-ack\n");
965
966 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
967 agg->wait_for_ba = (tx_resp->frame_count > 1);
968
969 /*
970 * If the BT kill count is non-zero, we'll get this
971 * notification again.
972 */
973 if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
974 priv->lib->bt_params &&
975 priv->lib->bt_params->advanced_bt_coexist) {
976 IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n");
977 }
978
979 if (tx_resp->frame_count == 1)
980 return;
981
982 IWL_DEBUG_TX_REPLY(priv, "TXQ %d initial_rate 0x%x ssn %d frm_cnt %d\n",
983 agg->txq_id,
984 le32_to_cpu(tx_resp->rate_n_flags),
985 iwlagn_get_scd_ssn(tx_resp), tx_resp->frame_count);
986
987 /* Construct bit-map of pending frames within Tx window */
988 for (i = 0; i < tx_resp->frame_count; i++) {
989 u16 fstatus = le16_to_cpu(frame_status[i].status);
990 u8 retry_cnt = (fstatus & AGG_TX_TRY_MSK) >> AGG_TX_TRY_POS;
991
992 if (status & AGG_TX_STATUS_MSK)
993 iwlagn_count_agg_tx_err_status(priv, fstatus);
994
995 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
996 AGG_TX_STATE_ABORT_MSK))
997 continue;
998
999 if (status & AGG_TX_STATUS_MSK || retry_cnt > 1)
1000 IWL_DEBUG_TX_REPLY(priv,
1001 "%d: status %s (0x%04x), try-count (0x%01x)\n",
1002 i,
1003 iwl_get_agg_tx_fail_reason(fstatus),
1004 fstatus & AGG_TX_STATUS_MSK,
1005 retry_cnt);
1006 }
1007 }
1008
1009 #ifdef CONFIG_IWLWIFI_DEBUG
1010 #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x
1011
1012 const char *iwl_get_agg_tx_fail_reason(u16 status)
1013 {
1014 status &= AGG_TX_STATUS_MSK;
1015 switch (status) {
1016 case AGG_TX_STATE_TRANSMITTED:
1017 return "SUCCESS";
1018 AGG_TX_STATE_FAIL(UNDERRUN_MSK);
1019 AGG_TX_STATE_FAIL(BT_PRIO_MSK);
1020 AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
1021 AGG_TX_STATE_FAIL(ABORT_MSK);
1022 AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
1023 AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
1024 AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
1025 AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
1026 AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
1027 AGG_TX_STATE_FAIL(RESPONSE_MSK);
1028 AGG_TX_STATE_FAIL(DUMP_TX_MSK);
1029 AGG_TX_STATE_FAIL(DELAY_TX_MSK);
1030 }
1031
1032 return "UNKNOWN";
1033 }
1034 #endif /* CONFIG_IWLWIFI_DEBUG */
1035
1036 static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
1037 {
1038 status &= TX_STATUS_MSK;
1039
1040 switch (status) {
1041 case TX_STATUS_POSTPONE_DELAY:
1042 priv->reply_tx_stats.pp_delay++;
1043 break;
1044 case TX_STATUS_POSTPONE_FEW_BYTES:
1045 priv->reply_tx_stats.pp_few_bytes++;
1046 break;
1047 case TX_STATUS_POSTPONE_BT_PRIO:
1048 priv->reply_tx_stats.pp_bt_prio++;
1049 break;
1050 case TX_STATUS_POSTPONE_QUIET_PERIOD:
1051 priv->reply_tx_stats.pp_quiet_period++;
1052 break;
1053 case TX_STATUS_POSTPONE_CALC_TTAK:
1054 priv->reply_tx_stats.pp_calc_ttak++;
1055 break;
1056 case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
1057 priv->reply_tx_stats.int_crossed_retry++;
1058 break;
1059 case TX_STATUS_FAIL_SHORT_LIMIT:
1060 priv->reply_tx_stats.short_limit++;
1061 break;
1062 case TX_STATUS_FAIL_LONG_LIMIT:
1063 priv->reply_tx_stats.long_limit++;
1064 break;
1065 case TX_STATUS_FAIL_FIFO_UNDERRUN:
1066 priv->reply_tx_stats.fifo_underrun++;
1067 break;
1068 case TX_STATUS_FAIL_DRAIN_FLOW:
1069 priv->reply_tx_stats.drain_flow++;
1070 break;
1071 case TX_STATUS_FAIL_RFKILL_FLUSH:
1072 priv->reply_tx_stats.rfkill_flush++;
1073 break;
1074 case TX_STATUS_FAIL_LIFE_EXPIRE:
1075 priv->reply_tx_stats.life_expire++;
1076 break;
1077 case TX_STATUS_FAIL_DEST_PS:
1078 priv->reply_tx_stats.dest_ps++;
1079 break;
1080 case TX_STATUS_FAIL_HOST_ABORTED:
1081 priv->reply_tx_stats.host_abort++;
1082 break;
1083 case TX_STATUS_FAIL_BT_RETRY:
1084 priv->reply_tx_stats.bt_retry++;
1085 break;
1086 case TX_STATUS_FAIL_STA_INVALID:
1087 priv->reply_tx_stats.sta_invalid++;
1088 break;
1089 case TX_STATUS_FAIL_FRAG_DROPPED:
1090 priv->reply_tx_stats.frag_drop++;
1091 break;
1092 case TX_STATUS_FAIL_TID_DISABLE:
1093 priv->reply_tx_stats.tid_disable++;
1094 break;
1095 case TX_STATUS_FAIL_FIFO_FLUSHED:
1096 priv->reply_tx_stats.fifo_flush++;
1097 break;
1098 case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
1099 priv->reply_tx_stats.insuff_cf_poll++;
1100 break;
1101 case TX_STATUS_FAIL_PASSIVE_NO_RX:
1102 priv->reply_tx_stats.fail_hw_drop++;
1103 break;
1104 case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
1105 priv->reply_tx_stats.sta_color_mismatch++;
1106 break;
1107 default:
1108 priv->reply_tx_stats.unknown++;
1109 break;
1110 }
1111 }
1112
1113 static void iwlagn_set_tx_status(struct iwl_priv *priv,
1114 struct ieee80211_tx_info *info,
1115 struct iwlagn_tx_resp *tx_resp)
1116 {
1117 u16 status = le16_to_cpu(tx_resp->status.status);
1118
1119 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1120
1121 info->status.rates[0].count = tx_resp->failure_frame + 1;
1122 info->flags |= iwl_tx_status_to_mac80211(status);
1123 iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
1124 info);
1125 if (!iwl_is_tx_success(status))
1126 iwlagn_count_tx_err_status(priv, status);
1127 }
1128
1129 static void iwl_check_abort_status(struct iwl_priv *priv,
1130 u8 frame_count, u32 status)
1131 {
1132 if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
1133 IWL_ERR(priv, "Tx flush command to flush out all frames\n");
1134 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
1135 queue_work(priv->workqueue, &priv->tx_flush);
1136 }
1137 }
1138
1139 int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1140 struct iwl_device_cmd *cmd)
1141 {
1142 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1143 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1144 int txq_id = SEQ_TO_QUEUE(sequence);
1145 int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence);
1146 struct iwlagn_tx_resp *tx_resp = (void *)pkt->data;
1147 struct ieee80211_hdr *hdr;
1148 u32 status = le16_to_cpu(tx_resp->status.status);
1149 u16 ssn = iwlagn_get_scd_ssn(tx_resp);
1150 int tid;
1151 int sta_id;
1152 int freed;
1153 struct ieee80211_tx_info *info;
1154 struct sk_buff_head skbs;
1155 struct sk_buff *skb;
1156 struct iwl_rxon_context *ctx;
1157 bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE);
1158
1159 tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
1160 IWLAGN_TX_RES_TID_POS;
1161 sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
1162 IWLAGN_TX_RES_RA_POS;
1163
1164 spin_lock_bh(&priv->sta_lock);
1165
1166 if (is_agg) {
1167 WARN_ON_ONCE(sta_id >= IWLAGN_STATION_COUNT ||
1168 tid >= IWL_MAX_TID_COUNT);
1169 if (txq_id != priv->tid_data[sta_id][tid].agg.txq_id)
1170 IWL_ERR(priv, "txq_id mismatch: %d %d\n", txq_id,
1171 priv->tid_data[sta_id][tid].agg.txq_id);
1172 iwl_rx_reply_tx_agg(priv, tx_resp);
1173 }
1174
1175 __skb_queue_head_init(&skbs);
1176
1177 if (tx_resp->frame_count == 1) {
1178 u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl);
1179 next_reclaimed = IEEE80211_SEQ_TO_SN(next_reclaimed + 0x10);
1180
1181 if (is_agg) {
1182 /* If this is an aggregation queue, we can rely on the
1183 * ssn since the wifi sequence number corresponds to
1184 * the index in the TFD ring (%256).
1185 * The seq_ctl is the sequence control of the packet
1186 * to which this Tx response relates. But if there is a
1187 * hole in the bitmap of the BA we received, this Tx
1188 * response may allow to reclaim the hole and all the
1189 * subsequent packets that were already acked.
1190 * In that case, seq_ctl != ssn, and the next packet
1191 * to be reclaimed will be ssn and not seq_ctl.
1192 */
1193 next_reclaimed = ssn;
1194 }
1195
1196 if (tid != IWL_TID_NON_QOS) {
1197 priv->tid_data[sta_id][tid].next_reclaimed =
1198 next_reclaimed;
1199 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1200 next_reclaimed);
1201 }
1202
1203 iwl_trans_reclaim(priv->trans, txq_id, ssn, &skbs);
1204
1205 iwlagn_check_ratid_empty(priv, sta_id, tid);
1206 freed = 0;
1207
1208 /* process frames */
1209 skb_queue_walk(&skbs, skb) {
1210 hdr = (struct ieee80211_hdr *)skb->data;
1211
1212 if (!ieee80211_is_data_qos(hdr->frame_control))
1213 priv->last_seq_ctl = tx_resp->seq_ctl;
1214
1215 info = IEEE80211_SKB_CB(skb);
1216 ctx = info->driver_data[0];
1217 iwl_trans_free_tx_cmd(priv->trans,
1218 info->driver_data[1]);
1219
1220 memset(&info->status, 0, sizeof(info->status));
1221
1222 if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
1223 ctx->vif &&
1224 ctx->vif->type == NL80211_IFTYPE_STATION) {
1225 /* block and stop all queues */
1226 priv->passive_no_rx = true;
1227 IWL_DEBUG_TX_QUEUES(priv, "stop all queues: "
1228 "passive channel");
1229 ieee80211_stop_queues(priv->hw);
1230
1231 IWL_DEBUG_TX_REPLY(priv,
1232 "TXQ %d status %s (0x%08x) "
1233 "rate_n_flags 0x%x retries %d\n",
1234 txq_id,
1235 iwl_get_tx_fail_reason(status),
1236 status,
1237 le32_to_cpu(tx_resp->rate_n_flags),
1238 tx_resp->failure_frame);
1239
1240 IWL_DEBUG_TX_REPLY(priv,
1241 "FrameCnt = %d, idx=%d\n",
1242 tx_resp->frame_count, cmd_index);
1243 }
1244
1245 /* check if BAR is needed */
1246 if (is_agg && !iwl_is_tx_success(status))
1247 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1248 iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb),
1249 tx_resp);
1250 if (!is_agg)
1251 iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1);
1252
1253 freed++;
1254 }
1255
1256 if (tid != IWL_TID_NON_QOS) {
1257 priv->tid_data[sta_id][tid].next_reclaimed =
1258 next_reclaimed;
1259 IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n",
1260 next_reclaimed);
1261 }
1262
1263 if (!is_agg && freed != 1)
1264 IWL_ERR(priv, "Q: %d, freed %d\n", txq_id, freed);
1265
1266 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x)\n", txq_id,
1267 iwl_get_tx_fail_reason(status), status);
1268
1269 IWL_DEBUG_TX_REPLY(priv,
1270 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d seq_ctl=0x%x\n",
1271 le32_to_cpu(tx_resp->rate_n_flags),
1272 tx_resp->failure_frame,
1273 SEQ_TO_INDEX(sequence), ssn,
1274 le16_to_cpu(tx_resp->seq_ctl));
1275 }
1276
1277 iwl_check_abort_status(priv, tx_resp->frame_count, status);
1278 spin_unlock_bh(&priv->sta_lock);
1279
1280 while (!skb_queue_empty(&skbs)) {
1281 skb = __skb_dequeue(&skbs);
1282 ieee80211_tx_status_ni(priv->hw, skb);
1283 }
1284
1285 return 0;
1286 }
1287
1288 /**
1289 * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
1290 *
1291 * Handles block-acknowledge notification from device, which reports success
1292 * of frames sent via aggregation.
1293 */
1294 int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
1295 struct iwl_rx_cmd_buffer *rxb,
1296 struct iwl_device_cmd *cmd)
1297 {
1298 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1299 struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data;
1300 struct iwl_ht_agg *agg;
1301 struct sk_buff_head reclaimed_skbs;
1302 struct ieee80211_tx_info *info;
1303 struct ieee80211_hdr *hdr;
1304 struct sk_buff *skb;
1305 int sta_id;
1306 int tid;
1307 int freed;
1308
1309 /* "flow" corresponds to Tx queue */
1310 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
1311
1312 /* "ssn" is start of block-ack Tx window, corresponds to index
1313 * (in Tx queue's circular buffer) of first TFD/frame in window */
1314 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
1315
1316 if (scd_flow >= priv->cfg->base_params->num_of_queues) {
1317 IWL_ERR(priv,
1318 "BUG_ON scd_flow is bigger than number of queues\n");
1319 return 0;
1320 }
1321
1322 sta_id = ba_resp->sta_id;
1323 tid = ba_resp->tid;
1324 agg = &priv->tid_data[sta_id][tid].agg;
1325
1326 spin_lock_bh(&priv->sta_lock);
1327
1328 if (unlikely(!agg->wait_for_ba)) {
1329 if (unlikely(ba_resp->bitmap))
1330 IWL_ERR(priv, "Received BA when not expected\n");
1331 spin_unlock_bh(&priv->sta_lock);
1332 return 0;
1333 }
1334
1335 if (unlikely(scd_flow != agg->txq_id)) {
1336 /*
1337 * FIXME: this is a uCode bug which need to be addressed,
1338 * log the information and return for now.
1339 * Since it is can possibly happen very often and in order
1340 * not to fill the syslog, don't use IWL_ERR or IWL_WARN
1341 */
1342 IWL_DEBUG_TX_QUEUES(priv,
1343 "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n",
1344 scd_flow, sta_id, tid, agg->txq_id);
1345 spin_unlock_bh(&priv->sta_lock);
1346 return 0;
1347 }
1348
1349 __skb_queue_head_init(&reclaimed_skbs);
1350
1351 /* Release all TFDs before the SSN, i.e. all TFDs in front of
1352 * block-ack window (we assume that they've been successfully
1353 * transmitted ... if not, it's too late anyway). */
1354 iwl_trans_reclaim(priv->trans, scd_flow, ba_resp_scd_ssn,
1355 &reclaimed_skbs);
1356
1357 IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, "
1358 "sta_id = %d\n",
1359 agg->wait_for_ba,
1360 (u8 *) &ba_resp->sta_addr_lo32,
1361 ba_resp->sta_id);
1362 IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, "
1363 "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1364 ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl),
1365 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
1366 scd_flow, ba_resp_scd_ssn, ba_resp->txed,
1367 ba_resp->txed_2_done);
1368
1369 /* Mark that the expected block-ack response arrived */
1370 agg->wait_for_ba = false;
1371
1372 /* Sanity check values reported by uCode */
1373 if (ba_resp->txed_2_done > ba_resp->txed) {
1374 IWL_DEBUG_TX_REPLY(priv,
1375 "bogus sent(%d) and ack(%d) count\n",
1376 ba_resp->txed, ba_resp->txed_2_done);
1377 /*
1378 * set txed_2_done = txed,
1379 * so it won't impact rate scale
1380 */
1381 ba_resp->txed = ba_resp->txed_2_done;
1382 }
1383
1384 priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn;
1385
1386 iwlagn_check_ratid_empty(priv, sta_id, tid);
1387 freed = 0;
1388
1389 skb_queue_walk(&reclaimed_skbs, skb) {
1390 hdr = (struct ieee80211_hdr *)skb->data;
1391
1392 if (ieee80211_is_data_qos(hdr->frame_control))
1393 freed++;
1394 else
1395 WARN_ON_ONCE(1);
1396
1397 info = IEEE80211_SKB_CB(skb);
1398 iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
1399
1400 if (freed == 1) {
1401 /* this is the first skb we deliver in this batch */
1402 /* put the rate scaling data there */
1403 info = IEEE80211_SKB_CB(skb);
1404 memset(&info->status, 0, sizeof(info->status));
1405 info->flags |= IEEE80211_TX_STAT_ACK;
1406 info->flags |= IEEE80211_TX_STAT_AMPDU;
1407 info->status.ampdu_ack_len = ba_resp->txed_2_done;
1408 info->status.ampdu_len = ba_resp->txed;
1409 iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags,
1410 info);
1411 }
1412 }
1413
1414 spin_unlock_bh(&priv->sta_lock);
1415
1416 while (!skb_queue_empty(&reclaimed_skbs)) {
1417 skb = __skb_dequeue(&reclaimed_skbs);
1418 ieee80211_tx_status_ni(priv->hw, skb);
1419 }
1420
1421 return 0;
1422 }
Linux with added FPC-III support