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Merge remote-tracking branch 'iwlwifi-fixes/master' into HEAD
[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
134 tx_cmd->driver_txop = 0;
135 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
136 /* Total # bytes to be transmitted */
137 tx_cmd->len = cpu_to_le16((u16)skb->len);
138 tx_cmd->next_frame_len = 0;
139 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
140 tx_cmd->sta_id = sta_id;
141}
142
143/*
144 * Sets the fields in the Tx cmd that are rate related
145 */
146static void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm,
147 struct iwl_tx_cmd *tx_cmd,
148 struct ieee80211_tx_info *info,
149 struct ieee80211_sta *sta,
150 __le16 fc)
151{
152 u32 rate_flags;
153 int rate_idx;
154 u8 rate_plcp;
155
156 /* Set retry limit on RTS packets */
157 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
158
159 /* Set retry limit on DATA packets and Probe Responses*/
160 if (ieee80211_is_probe_resp(fc)) {
161 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
162 tx_cmd->rts_retry_limit =
163 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
164 } else if (ieee80211_is_back_req(fc)) {
165 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
166 } else {
167 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
168 }
169
170 /*
e89044d7 171 * for data packets, rate info comes from the table inside the fw. This
8ca151b5
JB		 172 * table is controlled by LINK_QUALITY commands
173 */
174
9116a368 175 if (ieee80211_is_data(fc) && sta) {
8ca151b5
JB		 176 tx_cmd->initial_rate_index = 0;
177 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
178 return;
179 } else if (ieee80211_is_back_req(fc)) {
2edc6ec6
EG		 180 tx_cmd->tx_flags |=
181 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
8ca151b5
JB		 182 }
183
184 /* HT rate doesn't make sense for a non data frame */
185 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
186 "Got an HT rate for a non data frame 0x%x\n",
187 info->control.rates[0].flags);
188
189 rate_idx = info->control.rates[0].idx;
190 /* if the rate isn't a well known legacy rate, take the lowest one */
191 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
192 rate_idx = rate_lowest_index(
193 &mvm->nvm_data->bands[info->band], sta);
194
195 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
196 if (info->band == IEEE80211_BAND_5GHZ)
197 rate_idx += IWL_FIRST_OFDM_RATE;
198
199 /* For 2.4 GHZ band, check that there is no need to remap */
200 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
201
202 /* Get PLCP rate for tx_cmd->rate_n_flags */
203 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
204
205 mvm->mgmt_last_antenna_idx =
4ed735e7 206 iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant,
8ca151b5
JB		 207 mvm->mgmt_last_antenna_idx);
208 rate_flags = BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
209
210 /* Set CCK flag as needed */
211 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
212 rate_flags |= RATE_MCS_CCK_MSK;
213
214 /* Set the rate in the TX cmd */
215 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
216}
217
218/*
219 * Sets the fields in the Tx cmd that are crypto related
220 */
221static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
222 struct ieee80211_tx_info *info,
223 struct iwl_tx_cmd *tx_cmd,
224 struct sk_buff *skb_frag)
225{
226 struct ieee80211_key_conf *keyconf = info->control.hw_key;
227
228 switch (keyconf->cipher) {
229 case WLAN_CIPHER_SUITE_CCMP:
230 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
231 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
232 if (info->flags & IEEE80211_TX_CTL_AMPDU)
233 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_CCMP_AGG);
234 break;
235
236 case WLAN_CIPHER_SUITE_TKIP:
237 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
238 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
239 break;
240
241 case WLAN_CIPHER_SUITE_WEP104:
242 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
243 /* fall through */
244 case WLAN_CIPHER_SUITE_WEP40:
245 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
246 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
247 TX_CMD_SEC_WEP_KEY_IDX_MSK);
248
249 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
250 break;
251 default:
e36e5433 252 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
8ca151b5
JB		 253 }
254}
255
256/*
257 * Allocates and sets the Tx cmd the driver data pointers in the skb
258 */
259static struct iwl_device_cmd *
260iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
261 struct ieee80211_sta *sta, u8 sta_id)
262{
263 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
264 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
265 struct iwl_device_cmd *dev_cmd;
266 struct iwl_tx_cmd *tx_cmd;
267
268 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
269
270 if (unlikely(!dev_cmd))
271 return NULL;
272
273 memset(dev_cmd, 0, sizeof(*dev_cmd));
3961a61a 274 dev_cmd->hdr.cmd = TX_CMD;
8ca151b5
JB		 275 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
276
277 if (info->control.hw_key)
278 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb);
279
280 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
281
282 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
283
284 memset(&info->status, 0, sizeof(info->status));
285
286 info->driver_data[0] = NULL;
287 info->driver_data[1] = dev_cmd;
288
289 return dev_cmd;
290}
291
292int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
293{
294 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
295 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
296 struct iwl_device_cmd *dev_cmd;
297 struct iwl_tx_cmd *tx_cmd;
298 u8 sta_id;
299
300 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU))
301 return -1;
302
303 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
304 (!info->control.vif ||
305 info->hw_queue != info->control.vif->cab_queue)))
306 return -1;
307
308 /*
309 * If the interface on which frame is sent is the P2P_DEVICE
310 * or an AP/GO interface use the broadcast station associated
311 * with it; otherwise use the AUX station.
312 */
313 if (info->control.vif &&
314 (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
315 info->control.vif->type == NL80211_IFTYPE_AP)) {
316 struct iwl_mvm_vif *mvmvif =
317 iwl_mvm_vif_from_mac80211(info->control.vif);
318 sta_id = mvmvif->bcast_sta.sta_id;
319 } else {
320 sta_id = mvm->aux_sta.sta_id;
321 }
322
323 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue);
324
325 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, NULL, sta_id);
326 if (!dev_cmd)
327 return -1;
328
329 /* From now on, we cannot access info->control */
330 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
331
332 /* Copy MAC header from skb into command buffer */
333 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(hdr->frame_control));
334
335 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) {
336 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
337 return -1;
338 }
339
340 return 0;
341}
342
343/*
344 * Sets the fields in the Tx cmd that are crypto related
345 */
346int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
347 struct ieee80211_sta *sta)
348{
349 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
350 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
351 struct iwl_mvm_sta *mvmsta;
352 struct iwl_device_cmd *dev_cmd;
353 struct iwl_tx_cmd *tx_cmd;
354 __le16 fc;
355 u16 seq_number = 0;
356 u8 tid = IWL_MAX_TID_COUNT;
357 u8 txq_id = info->hw_queue;
358 bool is_data_qos = false, is_ampdu = false;
359
5b577a90 360 mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 361 fc = hdr->frame_control;
362
363 if (WARN_ON_ONCE(!mvmsta))
364 return -1;
365
881acd89 366 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
8ca151b5
JB		 367 return -1;
368
369 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, sta, mvmsta->sta_id);
370 if (!dev_cmd)
371 goto drop;
372
373 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
374 /* From now on, we cannot access info->control */
375
3e56eadf
JB		 376 /*
377 * we handle that entirely ourselves -- for uAPSD the firmware
378 * will always send a notification, and for PS-Poll responses
379 * we'll notify mac80211 when getting frame status
380 */
381 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
382
8ca151b5
JB		 383 spin_lock(&mvmsta->lock);
384
385 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
386 u8 *qc = NULL;
387 qc = ieee80211_get_qos_ctl(hdr);
388 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
389 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
390 goto drop_unlock_sta;
391
392 seq_number = mvmsta->tid_data[tid].seq_number;
393 seq_number &= IEEE80211_SCTL_SEQ;
394 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
395 hdr->seq_ctrl |= cpu_to_le16(seq_number);
8ca151b5
JB		 396 is_data_qos = true;
397 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
398 }
399
400 /* Copy MAC header from skb into command buffer */
401 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(fc));
402
403 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
404
405 if (is_ampdu) {
406 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
407 goto drop_unlock_sta;
408 txq_id = mvmsta->tid_data[tid].txq_id;
409 }
410
411 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
cf9d1188 412 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
8ca151b5 413
8ca151b5
JB		 414 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
415 goto drop_unlock_sta;
416
417 if (is_data_qos && !ieee80211_has_morefrags(fc))
cf9d1188 418 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
8ca151b5
JB		 419
420 spin_unlock(&mvmsta->lock);
421
19e737c9 422 if (txq_id < mvm->first_agg_queue)
e3d4bc8c 423 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
8ca151b5
JB		 424
425 return 0;
426
427drop_unlock_sta:
428 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
429 spin_unlock(&mvmsta->lock);
430drop:
431 return -1;
432}
433
434static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
435 struct ieee80211_sta *sta, u8 tid)
436{
5b577a90 437 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 438 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
439 struct ieee80211_vif *vif = mvmsta->vif;
440
441 lockdep_assert_held(&mvmsta->lock);
442
3e56eadf
JB		 443 if ((tid_data->state == IWL_AGG_ON ||
444 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
445 iwl_mvm_tid_queued(tid_data) == 0) {
446 /*
447 * Now that this aggregation queue is empty tell mac80211 so it
448 * knows we no longer have frames buffered for the station on
449 * this TID (for the TIM bitmap calculation.)
450 */
451 ieee80211_sta_set_buffered(sta, tid, false);
452 }
453
8ca151b5
JB		 454 if (tid_data->ssn != tid_data->next_reclaimed)
455 return;
456
457 switch (tid_data->state) {
458 case IWL_EMPTYING_HW_QUEUE_ADDBA:
459 IWL_DEBUG_TX_QUEUES(mvm,
460 "Can continue addBA flow ssn = next_recl = %d\n",
461 tid_data->next_reclaimed);
462 tid_data->state = IWL_AGG_STARTING;
463 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
464 break;
465
466 case IWL_EMPTYING_HW_QUEUE_DELBA:
467 IWL_DEBUG_TX_QUEUES(mvm,
468 "Can continue DELBA flow ssn = next_recl = %d\n",
469 tid_data->next_reclaimed);
470 iwl_trans_txq_disable(mvm->trans, tid_data->txq_id);
471 tid_data->state = IWL_AGG_OFF;
472 /*
473 * we can't hold the mutex - but since we are after a sequence
474 * point (call to iwl_trans_txq_disable), so we don't even need
475 * a memory barrier.
476 */
477 mvm->queue_to_mac80211[tid_data->txq_id] =
478 IWL_INVALID_MAC80211_QUEUE;
479 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
480 break;
481
482 default:
483 break;
484 }
485}
486
487#ifdef CONFIG_IWLWIFI_DEBUG
488const char *iwl_mvm_get_tx_fail_reason(u32 status)
489{
490#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
491#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
492
493 switch (status & TX_STATUS_MSK) {
494 case TX_STATUS_SUCCESS:
495 return "SUCCESS";
496 TX_STATUS_POSTPONE(DELAY);
497 TX_STATUS_POSTPONE(FEW_BYTES);
498 TX_STATUS_POSTPONE(BT_PRIO);
499 TX_STATUS_POSTPONE(QUIET_PERIOD);
500 TX_STATUS_POSTPONE(CALC_TTAK);
501 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
502 TX_STATUS_FAIL(SHORT_LIMIT);
503 TX_STATUS_FAIL(LONG_LIMIT);
504 TX_STATUS_FAIL(UNDERRUN);
505 TX_STATUS_FAIL(DRAIN_FLOW);
506 TX_STATUS_FAIL(RFKILL_FLUSH);
507 TX_STATUS_FAIL(LIFE_EXPIRE);
508 TX_STATUS_FAIL(DEST_PS);
509 TX_STATUS_FAIL(HOST_ABORTED);
510 TX_STATUS_FAIL(BT_RETRY);
511 TX_STATUS_FAIL(STA_INVALID);
512 TX_STATUS_FAIL(FRAG_DROPPED);
513 TX_STATUS_FAIL(TID_DISABLE);
514 TX_STATUS_FAIL(FIFO_FLUSHED);
515 TX_STATUS_FAIL(SMALL_CF_POLL);
516 TX_STATUS_FAIL(FW_DROP);
517 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
518 }
519
520 return "UNKNOWN";
521
522#undef TX_STATUS_FAIL
523#undef TX_STATUS_POSTPONE
524}
525#endif /* CONFIG_IWLWIFI_DEBUG */
526
d310e405
ES		 527void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
528 enum ieee80211_band band,
529 struct ieee80211_tx_rate *r)
8ca151b5 530{
8ca151b5
JB		 531 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
532 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
533 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
534 case RATE_MCS_CHAN_WIDTH_20:
535 break;
536 case RATE_MCS_CHAN_WIDTH_40:
537 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
538 break;
539 case RATE_MCS_CHAN_WIDTH_80:
540 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
541 break;
542 case RATE_MCS_CHAN_WIDTH_160:
543 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
544 break;
545 }
546 if (rate_n_flags & RATE_MCS_SGI_MSK)
547 r->flags |= IEEE80211_TX_RC_SHORT_GI;
548 if (rate_n_flags & RATE_MCS_HT_MSK) {
549 r->flags |= IEEE80211_TX_RC_MCS;
550 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
551 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
552 ieee80211_rate_set_vht(
553 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
554 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
555 RATE_VHT_MCS_NSS_POS) + 1);
556 r->flags |= IEEE80211_TX_RC_VHT_MCS;
557 } else {
558 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
d310e405 559 band);
8ca151b5
JB		 560 }
561}
562
d310e405
ES		 563/**
564 * translate ucode response to mac80211 tx status control values
565 */
566static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
567 struct ieee80211_tx_info *info)
568{
569 struct ieee80211_tx_rate *r = &info->status.rates[0];
570
571 info->status.antenna =
572 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
573 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
574}
575
8ca151b5
JB		 576static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
577 struct iwl_rx_packet *pkt)
578{
579 struct ieee80211_sta *sta;
580 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
581 int txq_id = SEQ_TO_QUEUE(sequence);
582 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
583 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
584 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
585 u32 status = le16_to_cpu(tx_resp->status.status);
586 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
587 struct iwl_mvm_sta *mvmsta;
588 struct sk_buff_head skbs;
589 u8 skb_freed = 0;
590 u16 next_reclaimed, seq_ctl;
591
592 __skb_queue_head_init(&skbs);
593
594 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
595
596 /* we can free until ssn % q.n_bd not inclusive */
597 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
598
599 while (!skb_queue_empty(&skbs)) {
600 struct sk_buff *skb = __skb_dequeue(&skbs);
601 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
602
603 skb_freed++;
604
605 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
606
607 memset(&info->status, 0, sizeof(info->status));
608
609 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
610
611 /* inform mac80211 about what happened with the frame */
612 switch (status & TX_STATUS_MSK) {
613 case TX_STATUS_SUCCESS:
614 case TX_STATUS_DIRECT_DONE:
615 info->flags |= IEEE80211_TX_STAT_ACK;
616 break;
617 case TX_STATUS_FAIL_DEST_PS:
618 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
619 break;
620 default:
621 break;
622 }
623
624 info->status.rates[0].count = tx_resp->failure_frame + 1;
d310e405
ES		 625 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
626 info);
8ca151b5
JB		 627
628 /* Single frame failure in an AMPDU queue => send BAR */
19e737c9 629 if (txq_id >= mvm->first_agg_queue &&
2470b36e 630 !(info->flags & IEEE80211_TX_STAT_ACK))
8ca151b5 631 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
8ca151b5 632
ebea2f32
EG		 633 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
634 if (status != TX_STATUS_SUCCESS) {
8ca151b5
JB		 635 struct ieee80211_hdr *hdr = (void *)skb->data;
636 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
637 }
638
3a84b69e
EP		 639 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
640 info->status.status_driver_data[0] =
641 (void *)(uintptr_t)tx_resp->reduced_tpc;
642
f14d6b39 643 ieee80211_tx_status(mvm->hw, skb);
8ca151b5
JB		 644 }
645
19e737c9 646 if (txq_id >= mvm->first_agg_queue) {
8ca151b5
JB		 647 /* If this is an aggregation queue, we use the ssn since:
648 * ssn = wifi seq_num % 256.
649 * The seq_ctl is the sequence control of the packet to which
650 * this Tx response relates. But if there is a hole in the
651 * bitmap of the BA we received, this Tx response may allow to
652 * reclaim the hole and all the subsequent packets that were
653 * already acked. In that case, seq_ctl != ssn, and the next
654 * packet to be reclaimed will be ssn and not seq_ctl. In that
655 * case, several packets will be reclaimed even if
656 * frame_count = 1.
657 *
658 * The ssn is the index (% 256) of the latest packet that has
659 * treated (acked / dropped) + 1.
660 */
661 next_reclaimed = ssn;
662 } else {
663 /* The next packet to be reclaimed is the one after this one */
9a886586 664 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
8ca151b5
JB		 665 }
666
667 IWL_DEBUG_TX_REPLY(mvm,
8c6e83d6
EG		 668 "TXQ %d status %s (0x%08x)\n",
669 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
670
671 IWL_DEBUG_TX_REPLY(mvm,
672 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
673 le32_to_cpu(tx_resp->initial_rate),
8ca151b5
JB		 674 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
675 ssn, next_reclaimed, seq_ctl);
676
677 rcu_read_lock();
678
679 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
9bb0c1ad
EG		 680 /*
681 * sta can't be NULL otherwise it'd mean that the sta has been freed in
682 * the firmware while we still have packets for it in the Tx queues.
683 */
684 if (WARN_ON_ONCE(!sta))
685 goto out;
8ca151b5 686
9bb0c1ad 687 if (!IS_ERR(sta)) {
5b577a90 688 mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 689
690 if (tid != IWL_TID_NON_QOS) {
691 struct iwl_mvm_tid_data *tid_data =
692 &mvmsta->tid_data[tid];
693
2bfb5092 694 spin_lock_bh(&mvmsta->lock);
8ca151b5
JB		 695 tid_data->next_reclaimed = next_reclaimed;
696 IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n",
697 next_reclaimed);
698 iwl_mvm_check_ratid_empty(mvm, sta, tid);
2bfb5092 699 spin_unlock_bh(&mvmsta->lock);
8ca151b5 700 }
3e56eadf
JB		 701
702 if (mvmsta->next_status_eosp) {
703 mvmsta->next_status_eosp = false;
704 ieee80211_sta_eosp(sta);
705 }
8ca151b5 706 } else {
8ca151b5
JB		 707 mvmsta = NULL;
708 }
709
710 /*
711 * If the txq is not an AMPDU queue, there is no chance we freed
712 * several skbs. Check that out...
8ca151b5 713 */
9bb0c1ad
EG		 714 if (txq_id >= mvm->first_agg_queue)
715 goto out;
716
717 /* We can't free more than one frame at once on a shared queue */
718 WARN_ON(skb_freed > 1);
719
720 /* If we have still frames from this STA nothing to do here */
721 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
722 goto out;
723
724 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
725 /*
726 * If there are no pending frames for this STA, notify
727 * mac80211 that this station can go to sleep in its
728 * STA table.
729 * If mvmsta is not NULL, sta is valid.
730 */
731 ieee80211_sta_block_awake(mvm->hw, sta, false);
732 }
733
734 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
735 /*
736 * We are draining and this was the last packet - pre_rcu_remove
737 * has been called already. We might be after the
738 * synchronize_net already.
739 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
740 */
741 set_bit(sta_id, mvm->sta_drained);
742 schedule_work(&mvm->sta_drained_wk);
8ca151b5
JB		 743 }
744
9bb0c1ad 745out:
8ca151b5
JB		 746 rcu_read_unlock();
747}
748
749#ifdef CONFIG_IWLWIFI_DEBUG
750#define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
751static const char *iwl_get_agg_tx_status(u16 status)
752{
753 switch (status & AGG_TX_STATE_STATUS_MSK) {
754 AGG_TX_STATE_(TRANSMITTED);
755 AGG_TX_STATE_(UNDERRUN);
756 AGG_TX_STATE_(BT_PRIO);
757 AGG_TX_STATE_(FEW_BYTES);
758 AGG_TX_STATE_(ABORT);
759 AGG_TX_STATE_(LAST_SENT_TTL);
760 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
761 AGG_TX_STATE_(LAST_SENT_BT_KILL);
762 AGG_TX_STATE_(SCD_QUERY);
763 AGG_TX_STATE_(TEST_BAD_CRC32);
764 AGG_TX_STATE_(RESPONSE);
765 AGG_TX_STATE_(DUMP_TX);
766 AGG_TX_STATE_(DELAY_TX);
767 }
768
769 return "UNKNOWN";
770}
771
772static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
773 struct iwl_rx_packet *pkt)
774{
775 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
776 struct agg_tx_status *frame_status = &tx_resp->status;
777 int i;
778
779 for (i = 0; i < tx_resp->frame_count; i++) {
780 u16 fstatus = le16_to_cpu(frame_status[i].status);
781
782 IWL_DEBUG_TX_REPLY(mvm,
783 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
784 iwl_get_agg_tx_status(fstatus),
785 fstatus & AGG_TX_STATE_STATUS_MSK,
786 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
787 AGG_TX_STATE_TRY_CNT_POS,
788 le16_to_cpu(frame_status[i].sequence));
789 }
790}
791#else
792static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
793 struct iwl_rx_packet *pkt)
794{}
795#endif /* CONFIG_IWLWIFI_DEBUG */
796
797static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
798 struct iwl_rx_packet *pkt)
799{
800 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
801 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
802 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
803 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
804 struct ieee80211_sta *sta;
805
19e737c9 806 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue))
8ca151b5
JB		 807 return;
808
809 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
810 return;
811
812 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
813
814 rcu_read_lock();
815
816 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
817
818 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
5b577a90 819 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 820 mvmsta->tid_data[tid].rate_n_flags =
821 le32_to_cpu(tx_resp->initial_rate);
3a84b69e 822 mvmsta->tid_data[tid].reduced_tpc = tx_resp->reduced_tpc;
8ca151b5
JB		 823 }
824
825 rcu_read_unlock();
826}
827
828int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
829 struct iwl_device_cmd *cmd)
830{
831 struct iwl_rx_packet *pkt = rxb_addr(rxb);
832 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
833
834 if (tx_resp->frame_count == 1)
835 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
836 else
837 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
838
839 return 0;
840}
841
842int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
843 struct iwl_device_cmd *cmd)
844{
845 struct iwl_rx_packet *pkt = rxb_addr(rxb);
846 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
847 struct sk_buff_head reclaimed_skbs;
848 struct iwl_mvm_tid_data *tid_data;
8ca151b5
JB		 849 struct ieee80211_sta *sta;
850 struct iwl_mvm_sta *mvmsta;
8ca151b5
JB		 851 struct sk_buff *skb;
852 int sta_id, tid, freed;
8ca151b5
JB		 853 /* "flow" corresponds to Tx queue */
854 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
8ca151b5
JB		 855 /* "ssn" is start of block-ack Tx window, corresponds to index
856 * (in Tx queue's circular buffer) of first TFD/frame in window */
857 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
858
859 sta_id = ba_notif->sta_id;
860 tid = ba_notif->tid;
861
862 rcu_read_lock();
863
864 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
865
866 /* Reclaiming frames for a station that has been deleted ? */
867 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
868 rcu_read_unlock();
869 return 0;
870 }
871
5b577a90 872 mvmsta = iwl_mvm_sta_from_mac80211(sta);
8ca151b5
JB		 873 tid_data = &mvmsta->tid_data[tid];
874
875 if (WARN_ONCE(tid_data->txq_id != scd_flow, "Q %d, tid %d, flow %d",
876 tid_data->txq_id, tid, scd_flow)) {
877 rcu_read_unlock();
878 return 0;
879 }
880
2bfb5092 881 spin_lock_bh(&mvmsta->lock);
8ca151b5
JB		 882
883 __skb_queue_head_init(&reclaimed_skbs);
884
885 /*
886 * Release all TFDs before the SSN, i.e. all TFDs in front of
887 * block-ack window (we assume that they've been successfully
888 * transmitted ... if not, it's too late anyway).
889 */
890 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
891 &reclaimed_skbs);
892
893 IWL_DEBUG_TX_REPLY(mvm,
894 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
895 (u8 *)&ba_notif->sta_addr_lo32,
896 ba_notif->sta_id);
897 IWL_DEBUG_TX_REPLY(mvm,
898 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
899 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
900 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
901 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
902 ba_notif->txed_2_done);
903
904 tid_data->next_reclaimed = ba_resp_scd_ssn;
905
906 iwl_mvm_check_ratid_empty(mvm, sta, tid);
907
908 freed = 0;
909
910 skb_queue_walk(&reclaimed_skbs, skb) {
143582c6
JB		 911 struct ieee80211_hdr *hdr = (void *)skb->data;
912 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
8ca151b5
JB		 913
914 if (ieee80211_is_data_qos(hdr->frame_control))
915 freed++;
916 else
917 WARN_ON_ONCE(1);
918
8ca151b5
JB		 919 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
920
143582c6
JB		 921 memset(&info->status, 0, sizeof(info->status));
922 /* Packet was transmitted successfully, failures come as single
923 * frames because before failing a frame the firmware transmits
924 * it without aggregation at least once.
925 */
926 info->flags |= IEEE80211_TX_STAT_ACK;
927
8ca151b5
JB		 928 if (freed == 1) {
929 /* this is the first skb we deliver in this batch */
930 /* put the rate scaling data there */
8ca151b5
JB		 931 info->flags |= IEEE80211_TX_STAT_AMPDU;
932 info->status.ampdu_ack_len = ba_notif->txed_2_done;
933 info->status.ampdu_len = ba_notif->txed;
d310e405
ES		 934 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
935 info);
3a84b69e
EP		 936 info->status.status_driver_data[0] =
937 (void *)(uintptr_t)tid_data->reduced_tpc;
8ca151b5
JB		 938 }
939 }
940
2bfb5092 941 spin_unlock_bh(&mvmsta->lock);
8ca151b5
JB		 942
943 rcu_read_unlock();
944
945 while (!skb_queue_empty(&reclaimed_skbs)) {
946 skb = __skb_dequeue(&reclaimed_skbs);
f14d6b39 947 ieee80211_tx_status(mvm->hw, skb);
8ca151b5
JB		 948 }
949
950 return 0;
951}
952
953int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync)
954{
955 int ret;
956 struct iwl_tx_path_flush_cmd flush_cmd = {
957 .queues_ctl = cpu_to_le32(tfd_msk),
958 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
959 };
960
961 u32 flags = sync ? CMD_SYNC : CMD_ASYNC;
962
963 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
964 sizeof(flush_cmd), &flush_cmd);
965 if (ret)
966 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
967 return ret;
968}
Linux kernel - Deliverables
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