projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
iwlwifi: mvm: Reflect GO channel switch in NoA
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / mvm / tx.c
CommitLineData
8ca151b5
JB		 1/******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
51368bf7 8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
8ca151b5
JB		 9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
22 * USA
23 *
24 * The full GNU General Public License is included in this distribution
410dc5aa 25 * in the file called COPYING.
8ca151b5
JB		 26 *
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
30 *
31 * BSD LICENSE
32 *
51368bf7 33 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
8ca151b5
JB		 34 * All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 *
40 * * Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * * Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
45 * distribution.
46 * * Neither the name Intel Corporation nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
61 *
62 *****************************************************************************/
63#include <linux/ieee80211.h>
64#include <linux/etherdevice.h>
65
66#include "iwl-trans.h"
67#include "iwl-eeprom-parse.h"
68#include "mvm.h"
69#include "sta.h"
70
71/*
72 * Sets most of the Tx cmd's fields
73 */
74static void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
75 struct iwl_tx_cmd *tx_cmd,
76 struct ieee80211_tx_info *info, u8 sta_id)
77{
78 struct ieee80211_hdr *hdr = (void *)skb->data;
79 __le16 fc = hdr->frame_control;
80 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
81 u32 len = skb->len + FCS_LEN;
b797e3fb 82 u8 ac;
8ca151b5
JB		 83
84 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
85 tx_flags |= TX_CMD_FLG_ACK;
86 else
87 tx_flags &= ~TX_CMD_FLG_ACK;
88
89 if (ieee80211_is_probe_resp(fc))
90 tx_flags |= TX_CMD_FLG_TSF;
91 else if (ieee80211_is_back_req(fc))
92 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
93
8ca151b5
JB		 94 if (ieee80211_has_morefrags(fc))
95 tx_flags |= TX_CMD_FLG_MORE_FRAG;
96
97 if (ieee80211_is_data_qos(fc)) {
98 u8 *qc = ieee80211_get_qos_ctl(hdr);
99 tx_cmd->tid_tspec = qc[0] & 0xf;
100 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
101 } else {
102 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
103 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
104 tx_flags |= TX_CMD_FLG_SEQ_CTL;
105 else
106 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
107 }
108
b797e3fb
EG		 109 /* tid_tspec will default to 0 = BE when QOS isn't enabled */
110 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
111 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
112 TX_CMD_FLG_BT_PRIO_POS;
113
8ca151b5
JB		 114 if (ieee80211_is_mgmt(fc)) {
115 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
116 tx_cmd->pm_frame_timeout = cpu_to_le16(3);
117 else
118 tx_cmd->pm_frame_timeout = cpu_to_le16(2);
119
120 /* The spec allows Action frames in A-MPDU, we don't support
121 * it
122 */
123 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
63f7535d 124 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
0f2ed58e 125 tx_cmd->pm_frame_timeout = cpu_to_le16(2);
8ca151b5
JB		 126 } else {
127 tx_cmd->pm_frame_timeout = 0;
128 }
129
8ca151b5
JB		 130 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
131 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
132 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
133
8ca151b5
JB		 134 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
135 /* Total # bytes to be transmitted */
136 tx_cmd->len = cpu_to_le16((u16)skb->len);
137 tx_cmd->next_frame_len = 0;
138 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
139 tx_cmd->sta_id = sta_id;
140}
141
142/*
143 * Sets the fields in the Tx cmd that are rate related
144 */
145static void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm,
146 struct iwl_tx_cmd *tx_cmd,
147 struct ieee80211_tx_info *info,
148 struct ieee80211_sta *sta,
149 __le16 fc)
150{
151 u32 rate_flags;
152 int rate_idx;
153 u8 rate_plcp;
154
155 /* Set retry limit on RTS packets */
156 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
157
158 /* Set retry limit on DATA packets and Probe Responses*/
159 if (ieee80211_is_probe_resp(fc)) {
160 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
161 tx_cmd->rts_retry_limit =
162 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
163 } else if (ieee80211_is_back_req(fc)) {
164 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
165 } else {
166 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
167 }
168
169 /*
e89044d7 170 * for data packets, rate info comes from the table inside the fw. This
8ca151b5
JB		 171 * table is controlled by LINK_QUALITY commands
172 */
173
9116a368 174 if (ieee80211_is_data(fc) && sta) {
8ca151b5
JB		 175 tx_cmd->initial_rate_index = 0;
176 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
177 return;
178 } else if (ieee80211_is_back_req(fc)) {
2edc6ec6
EG		 179 tx_cmd->tx_flags |=
180 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
8ca151b5
JB		 181 }
182
183 /* HT rate doesn't make sense for a non data frame */
184 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
185 "Got an HT rate for a non data frame 0x%x\n",
186 info->control.rates[0].flags);
187
188 rate_idx = info->control.rates[0].idx;
189 /* if the rate isn't a well known legacy rate, take the lowest one */
190 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
191 rate_idx = rate_lowest_index(
192 &mvm->nvm_data->bands[info->band], sta);
193
194 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
195 if (info->band == IEEE80211_BAND_5GHZ)
196 rate_idx += IWL_FIRST_OFDM_RATE;
197
198 /* For 2.4 GHZ band, check that there is no need to remap */
199 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
200
201 /* Get PLCP rate for tx_cmd->rate_n_flags */
202 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
203
204 mvm->mgmt_last_antenna_idx =
4ed735e7 205 iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant,
8ca151b5 206 mvm->mgmt_last_antenna_idx);
34c8b24f
EG		 207
208 if (info->band == IEEE80211_BAND_2GHZ &&
209 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
210 rate_flags = BIT(ANT_A) << RATE_MCS_ANT_POS;
211 else
212 rate_flags =
213 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
8ca151b5
JB		 214
215 /* Set CCK flag as needed */
216 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
217 rate_flags |= RATE_MCS_CCK_MSK;
218
219 /* Set the rate in the TX cmd */
220 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
221}
222
223/*
224 * Sets the fields in the Tx cmd that are crypto related
225 */
226static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
227 struct ieee80211_tx_info *info,
228 struct iwl_tx_cmd *tx_cmd,
229 struct sk_buff *skb_frag)
230{
231 struct ieee80211_key_conf *keyconf = info->control.hw_key;
232
233 switch (keyconf->cipher) {
234 case WLAN_CIPHER_SUITE_CCMP:
235 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
236 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
237 if (info->flags & IEEE80211_TX_CTL_AMPDU)
238 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_CCMP_AGG);
239 break;
240
241 case WLAN_CIPHER_SUITE_TKIP:
242 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
243 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
244 break;
245
246 case WLAN_CIPHER_SUITE_WEP104:
247 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
248 /* fall through */
249 case WLAN_CIPHER_SUITE_WEP40:
250 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
251 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
252 TX_CMD_SEC_WEP_KEY_IDX_MSK);
253
254 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
255 break;
256 default:
e36e5433 257 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
8ca151b5
JB		 258 }
259}
260
261/*
262 * Allocates and sets the Tx cmd the driver data pointers in the skb
263 */
264static struct iwl_device_cmd *
265iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
266 struct ieee80211_sta *sta, u8 sta_id)
267{
268 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
269 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
270 struct iwl_device_cmd *dev_cmd;
271 struct iwl_tx_cmd *tx_cmd;
272
273 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
274
275 if (unlikely(!dev_cmd))
276 return NULL;
277
278 memset(dev_cmd, 0, sizeof(*dev_cmd));
3961a61a 279 dev_cmd->hdr.cmd = TX_CMD;
8ca151b5
JB		 280 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
281
282 if (info->control.hw_key)
283 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb);
284
285 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
286
287 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
288
289 memset(&info->status, 0, sizeof(info->status));
290
291 info->driver_data[0] = NULL;
292 info->driver_data[1] = dev_cmd;
293
294 return dev_cmd;
295}
296
297int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
298{
299 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
300 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
301 struct iwl_device_cmd *dev_cmd;
302 struct iwl_tx_cmd *tx_cmd;
303 u8 sta_id;
304
305 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU))
306 return -1;
307
308 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
309 (!info->control.vif ||
310 info->hw_queue != info->control.vif->cab_queue)))
311 return -1;
312
313 /*
314 * If the interface on which frame is sent is the P2P_DEVICE
315 * or an AP/GO interface use the broadcast station associated
316 * with it; otherwise use the AUX station.
317 */
318 if (info->control.vif &&
319 (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
320 info->control.vif->type == NL80211_IFTYPE_AP)) {
321 struct iwl_mvm_vif *mvmvif =
322 iwl_mvm_vif_from_mac80211(info->control.vif);
323 sta_id = mvmvif->bcast_sta.sta_id;
324 } else {
325 sta_id = mvm->aux_sta.sta_id;
326 }
327
328 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue);
329
330 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, NULL, sta_id);
331 if (!dev_cmd)
332 return -1;
333
334 /* From now on, we cannot access info->control */
335 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
336
337 /* Copy MAC header from skb into command buffer */
338 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(hdr->frame_control));
339
340 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) {
341 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
342 return -1;
343 }
344
345 return 0;
346}
347
348/*
349 * Sets the fields in the Tx cmd that are crypto related
350 */
351int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
352 struct ieee80211_sta *sta)
353{
354 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
355 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
356 struct iwl_mvm_sta *mvmsta;
357 struct iwl_device_cmd *dev_cmd;
358 struct iwl_tx_cmd *tx_cmd;
359 __le16 fc;
360 u16 seq_number = 0;
361 u8 tid = IWL_MAX_TID_COUNT;
362 u8 txq_id = info->hw_queue;
363 bool is_data_qos = false, is_ampdu = false;
364
5b577a90 365 mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 366 fc = hdr->frame_control;
367
368 if (WARN_ON_ONCE(!mvmsta))
369 return -1;
370
881acd89 371 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
8ca151b5
JB		 372 return -1;
373
374 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, sta, mvmsta->sta_id);
375 if (!dev_cmd)
376 goto drop;
377
378 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
379 /* From now on, we cannot access info->control */
380
3e56eadf
JB		 381 /*
382 * we handle that entirely ourselves -- for uAPSD the firmware
383 * will always send a notification, and for PS-Poll responses
384 * we'll notify mac80211 when getting frame status
385 */
386 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
387
8ca151b5
JB		 388 spin_lock(&mvmsta->lock);
389
390 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
391 u8 *qc = NULL;
392 qc = ieee80211_get_qos_ctl(hdr);
393 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
394 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
395 goto drop_unlock_sta;
396
397 seq_number = mvmsta->tid_data[tid].seq_number;
398 seq_number &= IEEE80211_SCTL_SEQ;
399 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
400 hdr->seq_ctrl |= cpu_to_le16(seq_number);
8ca151b5
JB		 401 is_data_qos = true;
402 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
403 }
404
405 /* Copy MAC header from skb into command buffer */
406 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(fc));
407
408 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
409
410 if (is_ampdu) {
411 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
412 goto drop_unlock_sta;
413 txq_id = mvmsta->tid_data[tid].txq_id;
414 }
415
416 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
cf9d1188 417 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
8ca151b5 418
8ca151b5
JB		 419 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
420 goto drop_unlock_sta;
421
422 if (is_data_qos && !ieee80211_has_morefrags(fc))
cf9d1188 423 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
8ca151b5
JB		 424
425 spin_unlock(&mvmsta->lock);
426
19e737c9 427 if (txq_id < mvm->first_agg_queue)
e3d4bc8c 428 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
8ca151b5
JB		 429
430 return 0;
431
432drop_unlock_sta:
433 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
434 spin_unlock(&mvmsta->lock);
435drop:
436 return -1;
437}
438
439static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
440 struct ieee80211_sta *sta, u8 tid)
441{
5b577a90 442 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 443 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
444 struct ieee80211_vif *vif = mvmsta->vif;
445
446 lockdep_assert_held(&mvmsta->lock);
447
3e56eadf
JB		 448 if ((tid_data->state == IWL_AGG_ON ||
449 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
450 iwl_mvm_tid_queued(tid_data) == 0) {
451 /*
452 * Now that this aggregation queue is empty tell mac80211 so it
453 * knows we no longer have frames buffered for the station on
454 * this TID (for the TIM bitmap calculation.)
455 */
456 ieee80211_sta_set_buffered(sta, tid, false);
457 }
458
8ca151b5
JB		 459 if (tid_data->ssn != tid_data->next_reclaimed)
460 return;
461
462 switch (tid_data->state) {
463 case IWL_EMPTYING_HW_QUEUE_ADDBA:
464 IWL_DEBUG_TX_QUEUES(mvm,
465 "Can continue addBA flow ssn = next_recl = %d\n",
466 tid_data->next_reclaimed);
467 tid_data->state = IWL_AGG_STARTING;
468 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
469 break;
470
471 case IWL_EMPTYING_HW_QUEUE_DELBA:
472 IWL_DEBUG_TX_QUEUES(mvm,
473 "Can continue DELBA flow ssn = next_recl = %d\n",
474 tid_data->next_reclaimed);
475 iwl_trans_txq_disable(mvm->trans, tid_data->txq_id);
476 tid_data->state = IWL_AGG_OFF;
477 /*
478 * we can't hold the mutex - but since we are after a sequence
479 * point (call to iwl_trans_txq_disable), so we don't even need
480 * a memory barrier.
481 */
482 mvm->queue_to_mac80211[tid_data->txq_id] =
483 IWL_INVALID_MAC80211_QUEUE;
484 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
485 break;
486
487 default:
488 break;
489 }
490}
491
492#ifdef CONFIG_IWLWIFI_DEBUG
493const char *iwl_mvm_get_tx_fail_reason(u32 status)
494{
495#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
496#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
497
498 switch (status & TX_STATUS_MSK) {
499 case TX_STATUS_SUCCESS:
500 return "SUCCESS";
501 TX_STATUS_POSTPONE(DELAY);
502 TX_STATUS_POSTPONE(FEW_BYTES);
503 TX_STATUS_POSTPONE(BT_PRIO);
504 TX_STATUS_POSTPONE(QUIET_PERIOD);
505 TX_STATUS_POSTPONE(CALC_TTAK);
506 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
507 TX_STATUS_FAIL(SHORT_LIMIT);
508 TX_STATUS_FAIL(LONG_LIMIT);
509 TX_STATUS_FAIL(UNDERRUN);
510 TX_STATUS_FAIL(DRAIN_FLOW);
511 TX_STATUS_FAIL(RFKILL_FLUSH);
512 TX_STATUS_FAIL(LIFE_EXPIRE);
513 TX_STATUS_FAIL(DEST_PS);
514 TX_STATUS_FAIL(HOST_ABORTED);
515 TX_STATUS_FAIL(BT_RETRY);
516 TX_STATUS_FAIL(STA_INVALID);
517 TX_STATUS_FAIL(FRAG_DROPPED);
518 TX_STATUS_FAIL(TID_DISABLE);
519 TX_STATUS_FAIL(FIFO_FLUSHED);
520 TX_STATUS_FAIL(SMALL_CF_POLL);
521 TX_STATUS_FAIL(FW_DROP);
522 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
523 }
524
525 return "UNKNOWN";
526
527#undef TX_STATUS_FAIL
528#undef TX_STATUS_POSTPONE
529}
530#endif /* CONFIG_IWLWIFI_DEBUG */
531
d310e405
ES		 532void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
533 enum ieee80211_band band,
534 struct ieee80211_tx_rate *r)
8ca151b5 535{
8ca151b5
JB		 536 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
537 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
538 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
539 case RATE_MCS_CHAN_WIDTH_20:
540 break;
541 case RATE_MCS_CHAN_WIDTH_40:
542 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
543 break;
544 case RATE_MCS_CHAN_WIDTH_80:
545 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
546 break;
547 case RATE_MCS_CHAN_WIDTH_160:
548 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
549 break;
550 }
551 if (rate_n_flags & RATE_MCS_SGI_MSK)
552 r->flags |= IEEE80211_TX_RC_SHORT_GI;
553 if (rate_n_flags & RATE_MCS_HT_MSK) {
554 r->flags |= IEEE80211_TX_RC_MCS;
555 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
556 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
557 ieee80211_rate_set_vht(
558 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
559 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
560 RATE_VHT_MCS_NSS_POS) + 1);
561 r->flags |= IEEE80211_TX_RC_VHT_MCS;
562 } else {
563 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
d310e405 564 band);
8ca151b5
JB		 565 }
566}
567
d310e405
ES		 568/**
569 * translate ucode response to mac80211 tx status control values
570 */
571static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
572 struct ieee80211_tx_info *info)
573{
574 struct ieee80211_tx_rate *r = &info->status.rates[0];
575
576 info->status.antenna =
577 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
578 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
579}
580
8ca151b5
JB		 581static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
582 struct iwl_rx_packet *pkt)
583{
584 struct ieee80211_sta *sta;
585 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
586 int txq_id = SEQ_TO_QUEUE(sequence);
587 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
588 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
589 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
590 u32 status = le16_to_cpu(tx_resp->status.status);
591 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
592 struct iwl_mvm_sta *mvmsta;
593 struct sk_buff_head skbs;
594 u8 skb_freed = 0;
595 u16 next_reclaimed, seq_ctl;
596
597 __skb_queue_head_init(&skbs);
598
599 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
600
601 /* we can free until ssn % q.n_bd not inclusive */
602 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
603
604 while (!skb_queue_empty(&skbs)) {
605 struct sk_buff *skb = __skb_dequeue(&skbs);
606 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
607
608 skb_freed++;
609
610 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
611
612 memset(&info->status, 0, sizeof(info->status));
613
614 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
615
616 /* inform mac80211 about what happened with the frame */
617 switch (status & TX_STATUS_MSK) {
618 case TX_STATUS_SUCCESS:
619 case TX_STATUS_DIRECT_DONE:
620 info->flags |= IEEE80211_TX_STAT_ACK;
621 break;
622 case TX_STATUS_FAIL_DEST_PS:
623 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
624 break;
625 default:
626 break;
627 }
628
629 info->status.rates[0].count = tx_resp->failure_frame + 1;
d310e405
ES		 630 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
631 info);
8ca151b5
JB		 632
633 /* Single frame failure in an AMPDU queue => send BAR */
19e737c9 634 if (txq_id >= mvm->first_agg_queue &&
2470b36e 635 !(info->flags & IEEE80211_TX_STAT_ACK))
8ca151b5 636 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
8ca151b5 637
ebea2f32
EG		 638 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
639 if (status != TX_STATUS_SUCCESS) {
8ca151b5
JB		 640 struct ieee80211_hdr *hdr = (void *)skb->data;
641 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
642 }
643
3a84b69e
EP		 644 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
645 info->status.status_driver_data[0] =
646 (void *)(uintptr_t)tx_resp->reduced_tpc;
647
f14d6b39 648 ieee80211_tx_status(mvm->hw, skb);
8ca151b5
JB		 649 }
650
19e737c9 651 if (txq_id >= mvm->first_agg_queue) {
8ca151b5
JB		 652 /* If this is an aggregation queue, we use the ssn since:
653 * ssn = wifi seq_num % 256.
654 * The seq_ctl is the sequence control of the packet to which
655 * this Tx response relates. But if there is a hole in the
656 * bitmap of the BA we received, this Tx response may allow to
657 * reclaim the hole and all the subsequent packets that were
658 * already acked. In that case, seq_ctl != ssn, and the next
659 * packet to be reclaimed will be ssn and not seq_ctl. In that
660 * case, several packets will be reclaimed even if
661 * frame_count = 1.
662 *
663 * The ssn is the index (% 256) of the latest packet that has
664 * treated (acked / dropped) + 1.
665 */
666 next_reclaimed = ssn;
667 } else {
668 /* The next packet to be reclaimed is the one after this one */
9a886586 669 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
8ca151b5
JB		 670 }
671
672 IWL_DEBUG_TX_REPLY(mvm,
8c6e83d6
EG		 673 "TXQ %d status %s (0x%08x)\n",
674 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
675
676 IWL_DEBUG_TX_REPLY(mvm,
677 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
678 le32_to_cpu(tx_resp->initial_rate),
8ca151b5
JB		 679 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
680 ssn, next_reclaimed, seq_ctl);
681
682 rcu_read_lock();
683
684 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
9bb0c1ad
EG		 685 /*
686 * sta can't be NULL otherwise it'd mean that the sta has been freed in
687 * the firmware while we still have packets for it in the Tx queues.
688 */
689 if (WARN_ON_ONCE(!sta))
690 goto out;
8ca151b5 691
9bb0c1ad 692 if (!IS_ERR(sta)) {
5b577a90 693 mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 694
695 if (tid != IWL_TID_NON_QOS) {
696 struct iwl_mvm_tid_data *tid_data =
697 &mvmsta->tid_data[tid];
698
2bfb5092 699 spin_lock_bh(&mvmsta->lock);
8ca151b5
JB		 700 tid_data->next_reclaimed = next_reclaimed;
701 IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n",
702 next_reclaimed);
703 iwl_mvm_check_ratid_empty(mvm, sta, tid);
2bfb5092 704 spin_unlock_bh(&mvmsta->lock);
8ca151b5 705 }
3e56eadf
JB		 706
707 if (mvmsta->next_status_eosp) {
708 mvmsta->next_status_eosp = false;
709 ieee80211_sta_eosp(sta);
710 }
8ca151b5 711 } else {
8ca151b5
JB		 712 mvmsta = NULL;
713 }
714
715 /*
716 * If the txq is not an AMPDU queue, there is no chance we freed
717 * several skbs. Check that out...
8ca151b5 718 */
9bb0c1ad
EG		 719 if (txq_id >= mvm->first_agg_queue)
720 goto out;
721
722 /* We can't free more than one frame at once on a shared queue */
723 WARN_ON(skb_freed > 1);
724
725 /* If we have still frames from this STA nothing to do here */
726 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
727 goto out;
728
729 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
730 /*
731 * If there are no pending frames for this STA, notify
732 * mac80211 that this station can go to sleep in its
733 * STA table.
734 * If mvmsta is not NULL, sta is valid.
735 */
736 ieee80211_sta_block_awake(mvm->hw, sta, false);
737 }
738
739 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
740 /*
741 * We are draining and this was the last packet - pre_rcu_remove
742 * has been called already. We might be after the
743 * synchronize_net already.
744 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
745 */
746 set_bit(sta_id, mvm->sta_drained);
747 schedule_work(&mvm->sta_drained_wk);
8ca151b5
JB		 748 }
749
9bb0c1ad 750out:
8ca151b5
JB		 751 rcu_read_unlock();
752}
753
754#ifdef CONFIG_IWLWIFI_DEBUG
755#define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
756static const char *iwl_get_agg_tx_status(u16 status)
757{
758 switch (status & AGG_TX_STATE_STATUS_MSK) {
759 AGG_TX_STATE_(TRANSMITTED);
760 AGG_TX_STATE_(UNDERRUN);
761 AGG_TX_STATE_(BT_PRIO);
762 AGG_TX_STATE_(FEW_BYTES);
763 AGG_TX_STATE_(ABORT);
764 AGG_TX_STATE_(LAST_SENT_TTL);
765 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
766 AGG_TX_STATE_(LAST_SENT_BT_KILL);
767 AGG_TX_STATE_(SCD_QUERY);
768 AGG_TX_STATE_(TEST_BAD_CRC32);
769 AGG_TX_STATE_(RESPONSE);
770 AGG_TX_STATE_(DUMP_TX);
771 AGG_TX_STATE_(DELAY_TX);
772 }
773
774 return "UNKNOWN";
775}
776
777static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
778 struct iwl_rx_packet *pkt)
779{
780 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
781 struct agg_tx_status *frame_status = &tx_resp->status;
782 int i;
783
784 for (i = 0; i < tx_resp->frame_count; i++) {
785 u16 fstatus = le16_to_cpu(frame_status[i].status);
786
787 IWL_DEBUG_TX_REPLY(mvm,
788 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
789 iwl_get_agg_tx_status(fstatus),
790 fstatus & AGG_TX_STATE_STATUS_MSK,
791 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
792 AGG_TX_STATE_TRY_CNT_POS,
793 le16_to_cpu(frame_status[i].sequence));
794 }
795}
796#else
797static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
798 struct iwl_rx_packet *pkt)
799{}
800#endif /* CONFIG_IWLWIFI_DEBUG */
801
802static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
803 struct iwl_rx_packet *pkt)
804{
805 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
806 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
807 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
808 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
809 struct ieee80211_sta *sta;
810
19e737c9 811 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue))
8ca151b5
JB		 812 return;
813
814 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
815 return;
816
817 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
818
819 rcu_read_lock();
820
821 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
822
823 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
5b577a90 824 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 825 mvmsta->tid_data[tid].rate_n_flags =
826 le32_to_cpu(tx_resp->initial_rate);
3a84b69e 827 mvmsta->tid_data[tid].reduced_tpc = tx_resp->reduced_tpc;
8ca151b5
JB		 828 }
829
830 rcu_read_unlock();
831}
832
833int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
834 struct iwl_device_cmd *cmd)
835{
836 struct iwl_rx_packet *pkt = rxb_addr(rxb);
837 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
838
839 if (tx_resp->frame_count == 1)
840 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
841 else
842 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
843
844 return 0;
845}
846
847int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
848 struct iwl_device_cmd *cmd)
849{
850 struct iwl_rx_packet *pkt = rxb_addr(rxb);
851 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
852 struct sk_buff_head reclaimed_skbs;
853 struct iwl_mvm_tid_data *tid_data;
8ca151b5
JB		 854 struct ieee80211_sta *sta;
855 struct iwl_mvm_sta *mvmsta;
8ca151b5
JB		 856 struct sk_buff *skb;
857 int sta_id, tid, freed;
8ca151b5
JB		 858 /* "flow" corresponds to Tx queue */
859 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
8ca151b5
JB		 860 /* "ssn" is start of block-ack Tx window, corresponds to index
861 * (in Tx queue's circular buffer) of first TFD/frame in window */
862 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
863
864 sta_id = ba_notif->sta_id;
865 tid = ba_notif->tid;
866
867 rcu_read_lock();
868
869 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
870
871 /* Reclaiming frames for a station that has been deleted ? */
872 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
873 rcu_read_unlock();
874 return 0;
875 }
876
5b577a90 877 mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 878 tid_data = &mvmsta->tid_data[tid];
879
880 if (WARN_ONCE(tid_data->txq_id != scd_flow, "Q %d, tid %d, flow %d",
881 tid_data->txq_id, tid, scd_flow)) {
882 rcu_read_unlock();
883 return 0;
884 }
885
2bfb5092 886 spin_lock_bh(&mvmsta->lock);
8ca151b5
JB		 887
888 __skb_queue_head_init(&reclaimed_skbs);
889
890 /*
891 * Release all TFDs before the SSN, i.e. all TFDs in front of
892 * block-ack window (we assume that they've been successfully
893 * transmitted ... if not, it's too late anyway).
894 */
895 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
896 &reclaimed_skbs);
897
898 IWL_DEBUG_TX_REPLY(mvm,
899 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
900 (u8 *)&ba_notif->sta_addr_lo32,
901 ba_notif->sta_id);
902 IWL_DEBUG_TX_REPLY(mvm,
903 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
904 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
905 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
906 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
907 ba_notif->txed_2_done);
908
909 tid_data->next_reclaimed = ba_resp_scd_ssn;
910
911 iwl_mvm_check_ratid_empty(mvm, sta, tid);
912
913 freed = 0;
914
915 skb_queue_walk(&reclaimed_skbs, skb) {
143582c6
JB		 916 struct ieee80211_hdr *hdr = (void *)skb->data;
917 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
8ca151b5
JB		 918
919 if (ieee80211_is_data_qos(hdr->frame_control))
920 freed++;
921 else
922 WARN_ON_ONCE(1);
923
8ca151b5
JB		 924 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
925
143582c6
JB		 926 memset(&info->status, 0, sizeof(info->status));
927 /* Packet was transmitted successfully, failures come as single
928 * frames because before failing a frame the firmware transmits
929 * it without aggregation at least once.
930 */
931 info->flags |= IEEE80211_TX_STAT_ACK;
932
8ca151b5
JB		 933 if (freed == 1) {
934 /* this is the first skb we deliver in this batch */
935 /* put the rate scaling data there */
8ca151b5
JB		 936 info->flags |= IEEE80211_TX_STAT_AMPDU;
937 info->status.ampdu_ack_len = ba_notif->txed_2_done;
938 info->status.ampdu_len = ba_notif->txed;
d310e405
ES		 939 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
940 info);
3a84b69e
EP		 941 info->status.status_driver_data[0] =
942 (void *)(uintptr_t)tid_data->reduced_tpc;
8ca151b5
JB		 943 }
944 }
945
2bfb5092 946 spin_unlock_bh(&mvmsta->lock);
8ca151b5
JB		 947
948 rcu_read_unlock();
949
950 while (!skb_queue_empty(&reclaimed_skbs)) {
951 skb = __skb_dequeue(&reclaimed_skbs);
f14d6b39 952 ieee80211_tx_status(mvm->hw, skb);
8ca151b5
JB		 953 }
954
955 return 0;
956}
957
958int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync)
959{
960 int ret;
961 struct iwl_tx_path_flush_cmd flush_cmd = {
962 .queues_ctl = cpu_to_le32(tfd_msk),
963 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
964 };
965
a1022927 966 u32 flags = sync ? 0 : CMD_ASYNC;
8ca151b5
JB		 967
968 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
969 sizeof(flush_cmd), &flush_cmd);
970 if (ret)
971 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
972 return ret;
973}
Linux kernel - Deliverables
This page took 0.161683 seconds and 5 git commands to generate.