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iwlwifi: add the MVM driver
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / mvm / tx.c
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
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
25 * in the file called LICENSE.GPL.
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 *
33 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
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 */
74 static 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;
82
83 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
84 tx_flags |= TX_CMD_FLG_ACK;
85 else
86 tx_flags &= ~TX_CMD_FLG_ACK;
87
88 if (ieee80211_is_probe_resp(fc))
89 tx_flags |= TX_CMD_FLG_TSF;
90 else if (ieee80211_is_back_req(fc))
91 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
92
93 /* High prio packet (wrt. BT coex) if it is EAPOL, MCAST or MGMT */
94 if (info->band == IEEE80211_BAND_2GHZ &&
95 (skb->protocol == cpu_to_be16(ETH_P_PAE) ||
96 is_multicast_ether_addr(hdr->addr1) ||
97 ieee80211_is_back_req(fc) ||
98 ieee80211_is_mgmt(fc)))
99 tx_flags |= TX_CMD_FLG_BT_DIS;
100
101 if (ieee80211_has_morefrags(fc))
102 tx_flags |= TX_CMD_FLG_MORE_FRAG;
103
104 if (ieee80211_is_data_qos(fc)) {
105 u8 *qc = ieee80211_get_qos_ctl(hdr);
106 tx_cmd->tid_tspec = qc[0] & 0xf;
107 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
108 } else {
109 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
110 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
111 tx_flags |= TX_CMD_FLG_SEQ_CTL;
112 else
113 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
114 }
115
116 if (ieee80211_is_mgmt(fc)) {
117 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
118 tx_cmd->pm_frame_timeout = cpu_to_le16(3);
119 else
120 tx_cmd->pm_frame_timeout = cpu_to_le16(2);
121
122 /* The spec allows Action frames in A-MPDU, we don't support
123 * it
124 */
125 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
126 } else {
127 tx_cmd->pm_frame_timeout = 0;
128 }
129
130 if (info->flags & IEEE80211_TX_CTL_AMPDU)
131 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
132
133 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
134 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
135 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
136
137 tx_cmd->driver_txop = 0;
138 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
139 /* Total # bytes to be transmitted */
140 tx_cmd->len = cpu_to_le16((u16)skb->len);
141 tx_cmd->next_frame_len = 0;
142 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
143 tx_cmd->sta_id = sta_id;
144 }
145
146 /*
147 * Sets the fields in the Tx cmd that are rate related
148 */
149 static void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm,
150 struct iwl_tx_cmd *tx_cmd,
151 struct ieee80211_tx_info *info,
152 struct ieee80211_sta *sta,
153 __le16 fc)
154 {
155 u32 rate_flags;
156 int rate_idx;
157 u8 rate_plcp;
158
159 /* Set retry limit on RTS packets */
160 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
161
162 /* Set retry limit on DATA packets and Probe Responses*/
163 if (ieee80211_is_probe_resp(fc)) {
164 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
165 tx_cmd->rts_retry_limit =
166 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
167 } else if (ieee80211_is_back_req(fc)) {
168 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
169 } else {
170 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
171 }
172
173 /*
174 * for data packets, rate info comes from the table inside he fw. This
175 * table is controlled by LINK_QUALITY commands
176 */
177
178 if (ieee80211_is_data(fc)) {
179 tx_cmd->initial_rate_index = 0;
180 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
181 return;
182 } else if (ieee80211_is_back_req(fc)) {
183 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
184 }
185
186 /* HT rate doesn't make sense for a non data frame */
187 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
188 "Got an HT rate for a non data frame 0x%x\n",
189 info->control.rates[0].flags);
190
191 rate_idx = info->control.rates[0].idx;
192 /* if the rate isn't a well known legacy rate, take the lowest one */
193 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
194 rate_idx = rate_lowest_index(
195 &mvm->nvm_data->bands[info->band], sta);
196
197 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
198 if (info->band == IEEE80211_BAND_5GHZ)
199 rate_idx += IWL_FIRST_OFDM_RATE;
200
201 /* For 2.4 GHZ band, check that there is no need to remap */
202 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
203
204 /* Get PLCP rate for tx_cmd->rate_n_flags */
205 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
206
207 mvm->mgmt_last_antenna_idx =
208 iwl_mvm_next_antenna(mvm, mvm->nvm_data->valid_tx_ant,
209 mvm->mgmt_last_antenna_idx);
210 rate_flags = BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
211
212 /* Set CCK flag as needed */
213 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
214 rate_flags |= RATE_MCS_CCK_MSK;
215
216 /* Set the rate in the TX cmd */
217 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
218 }
219
220 /*
221 * Sets the fields in the Tx cmd that are crypto related
222 */
223 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
224 struct ieee80211_tx_info *info,
225 struct iwl_tx_cmd *tx_cmd,
226 struct sk_buff *skb_frag)
227 {
228 struct ieee80211_key_conf *keyconf = info->control.hw_key;
229
230 switch (keyconf->cipher) {
231 case WLAN_CIPHER_SUITE_CCMP:
232 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
233 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
234 if (info->flags & IEEE80211_TX_CTL_AMPDU)
235 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_CCMP_AGG);
236 break;
237
238 case WLAN_CIPHER_SUITE_TKIP:
239 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
240 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
241 break;
242
243 case WLAN_CIPHER_SUITE_WEP104:
244 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
245 /* fall through */
246 case WLAN_CIPHER_SUITE_WEP40:
247 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
248 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
249 TX_CMD_SEC_WEP_KEY_IDX_MSK);
250
251 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
252 break;
253 default:
254 IWL_ERR(mvm, "Unknown encode cipher %x\n", keyconf->cipher);
255 break;
256 }
257 }
258
259 /*
260 * Allocates and sets the Tx cmd the driver data pointers in the skb
261 */
262 static struct iwl_device_cmd *
263 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
264 struct ieee80211_sta *sta, u8 sta_id)
265 {
266 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
267 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
268 struct iwl_device_cmd *dev_cmd;
269 struct iwl_tx_cmd *tx_cmd;
270
271 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
272
273 if (unlikely(!dev_cmd))
274 return NULL;
275
276 memset(dev_cmd, 0, sizeof(*dev_cmd));
277 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
278
279 if (info->control.hw_key)
280 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb);
281
282 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
283
284 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
285
286 memset(&info->status, 0, sizeof(info->status));
287
288 info->driver_data[0] = NULL;
289 info->driver_data[1] = dev_cmd;
290
291 return dev_cmd;
292 }
293
294 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
295 {
296 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
297 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
298 struct iwl_device_cmd *dev_cmd;
299 struct iwl_tx_cmd *tx_cmd;
300 u8 sta_id;
301
302 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU))
303 return -1;
304
305 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
306 (!info->control.vif ||
307 info->hw_queue != info->control.vif->cab_queue)))
308 return -1;
309
310 /*
311 * If the interface on which frame is sent is the P2P_DEVICE
312 * or an AP/GO interface use the broadcast station associated
313 * with it; otherwise use the AUX station.
314 */
315 if (info->control.vif &&
316 (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
317 info->control.vif->type == NL80211_IFTYPE_AP)) {
318 struct iwl_mvm_vif *mvmvif =
319 iwl_mvm_vif_from_mac80211(info->control.vif);
320 sta_id = mvmvif->bcast_sta.sta_id;
321 } else {
322 sta_id = mvm->aux_sta.sta_id;
323 }
324
325 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue);
326
327 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, NULL, sta_id);
328 if (!dev_cmd)
329 return -1;
330
331 /* From now on, we cannot access info->control */
332 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
333
334 /* Copy MAC header from skb into command buffer */
335 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(hdr->frame_control));
336
337 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) {
338 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
339 return -1;
340 }
341
342 return 0;
343 }
344
345 /*
346 * Sets the fields in the Tx cmd that are crypto related
347 */
348 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
349 struct ieee80211_sta *sta)
350 {
351 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
352 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
353 struct iwl_mvm_sta *mvmsta;
354 struct iwl_device_cmd *dev_cmd;
355 struct iwl_tx_cmd *tx_cmd;
356 __le16 fc;
357 u16 seq_number = 0;
358 u8 tid = IWL_MAX_TID_COUNT;
359 u8 txq_id = info->hw_queue;
360 bool is_data_qos = false, is_ampdu = false;
361
362 mvmsta = (void *)sta->drv_priv;
363 fc = hdr->frame_control;
364
365 if (WARN_ON_ONCE(!mvmsta))
366 return -1;
367
368 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_INVALID_STATION))
369 return -1;
370
371 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, sta, mvmsta->sta_id);
372 if (!dev_cmd)
373 goto drop;
374
375 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
376 /* From now on, we cannot access info->control */
377
378 spin_lock(&mvmsta->lock);
379
380 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
381 u8 *qc = NULL;
382 qc = ieee80211_get_qos_ctl(hdr);
383 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
384 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
385 goto drop_unlock_sta;
386
387 seq_number = mvmsta->tid_data[tid].seq_number;
388 seq_number &= IEEE80211_SCTL_SEQ;
389 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
390 hdr->seq_ctrl |= cpu_to_le16(seq_number);
391 seq_number += 0x10;
392 is_data_qos = true;
393 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
394 }
395
396 /* Copy MAC header from skb into command buffer */
397 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(fc));
398
399 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
400
401 if (is_ampdu) {
402 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
403 goto drop_unlock_sta;
404 txq_id = mvmsta->tid_data[tid].txq_id;
405 }
406
407 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
408 tid, txq_id, seq_number);
409
410 /* NOTE: aggregation will need changes here (for txq id) */
411 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
412 goto drop_unlock_sta;
413
414 if (is_data_qos && !ieee80211_has_morefrags(fc))
415 mvmsta->tid_data[tid].seq_number = seq_number;
416
417 spin_unlock(&mvmsta->lock);
418
419 if (mvmsta->vif->type == NL80211_IFTYPE_AP &&
420 txq_id < IWL_FIRST_AMPDU_QUEUE)
421 atomic_inc(&mvmsta->pending_frames);
422
423 return 0;
424
425 drop_unlock_sta:
426 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
427 spin_unlock(&mvmsta->lock);
428 drop:
429 return -1;
430 }
431
432 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
433 struct ieee80211_sta *sta, u8 tid)
434 {
435 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
436 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
437 struct ieee80211_vif *vif = mvmsta->vif;
438
439 lockdep_assert_held(&mvmsta->lock);
440
441 if (tid_data->ssn != tid_data->next_reclaimed)
442 return;
443
444 switch (tid_data->state) {
445 case IWL_EMPTYING_HW_QUEUE_ADDBA:
446 IWL_DEBUG_TX_QUEUES(mvm,
447 "Can continue addBA flow ssn = next_recl = %d\n",
448 tid_data->next_reclaimed);
449 tid_data->state = IWL_AGG_STARTING;
450 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
451 break;
452
453 case IWL_EMPTYING_HW_QUEUE_DELBA:
454 IWL_DEBUG_TX_QUEUES(mvm,
455 "Can continue DELBA flow ssn = next_recl = %d\n",
456 tid_data->next_reclaimed);
457 iwl_trans_txq_disable(mvm->trans, tid_data->txq_id);
458 tid_data->state = IWL_AGG_OFF;
459 /*
460 * we can't hold the mutex - but since we are after a sequence
461 * point (call to iwl_trans_txq_disable), so we don't even need
462 * a memory barrier.
463 */
464 mvm->queue_to_mac80211[tid_data->txq_id] =
465 IWL_INVALID_MAC80211_QUEUE;
466 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
467 break;
468
469 default:
470 break;
471 }
472 }
473
474 #ifdef CONFIG_IWLWIFI_DEBUG
475 const char *iwl_mvm_get_tx_fail_reason(u32 status)
476 {
477 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
478 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
479
480 switch (status & TX_STATUS_MSK) {
481 case TX_STATUS_SUCCESS:
482 return "SUCCESS";
483 TX_STATUS_POSTPONE(DELAY);
484 TX_STATUS_POSTPONE(FEW_BYTES);
485 TX_STATUS_POSTPONE(BT_PRIO);
486 TX_STATUS_POSTPONE(QUIET_PERIOD);
487 TX_STATUS_POSTPONE(CALC_TTAK);
488 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
489 TX_STATUS_FAIL(SHORT_LIMIT);
490 TX_STATUS_FAIL(LONG_LIMIT);
491 TX_STATUS_FAIL(UNDERRUN);
492 TX_STATUS_FAIL(DRAIN_FLOW);
493 TX_STATUS_FAIL(RFKILL_FLUSH);
494 TX_STATUS_FAIL(LIFE_EXPIRE);
495 TX_STATUS_FAIL(DEST_PS);
496 TX_STATUS_FAIL(HOST_ABORTED);
497 TX_STATUS_FAIL(BT_RETRY);
498 TX_STATUS_FAIL(STA_INVALID);
499 TX_STATUS_FAIL(FRAG_DROPPED);
500 TX_STATUS_FAIL(TID_DISABLE);
501 TX_STATUS_FAIL(FIFO_FLUSHED);
502 TX_STATUS_FAIL(SMALL_CF_POLL);
503 TX_STATUS_FAIL(FW_DROP);
504 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
505 }
506
507 return "UNKNOWN";
508
509 #undef TX_STATUS_FAIL
510 #undef TX_STATUS_POSTPONE
511 }
512 #endif /* CONFIG_IWLWIFI_DEBUG */
513
514 /**
515 * translate ucode response to mac80211 tx status control values
516 */
517 static void iwl_mvm_hwrate_to_tx_control(u32 rate_n_flags,
518 struct ieee80211_tx_info *info)
519 {
520 struct ieee80211_tx_rate *r = &info->status.rates[0];
521
522 info->status.antenna =
523 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
524 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
525 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
526 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
527 case RATE_MCS_CHAN_WIDTH_20:
528 break;
529 case RATE_MCS_CHAN_WIDTH_40:
530 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
531 break;
532 case RATE_MCS_CHAN_WIDTH_80:
533 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
534 break;
535 case RATE_MCS_CHAN_WIDTH_160:
536 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
537 break;
538 }
539 if (rate_n_flags & RATE_MCS_SGI_MSK)
540 r->flags |= IEEE80211_TX_RC_SHORT_GI;
541 if (rate_n_flags & RATE_MCS_HT_MSK) {
542 r->flags |= IEEE80211_TX_RC_MCS;
543 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
544 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
545 ieee80211_rate_set_vht(
546 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
547 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
548 RATE_VHT_MCS_NSS_POS) + 1);
549 r->flags |= IEEE80211_TX_RC_VHT_MCS;
550 } else {
551 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
552 info->band);
553 }
554 }
555
556 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
557 struct iwl_rx_packet *pkt)
558 {
559 struct ieee80211_sta *sta;
560 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
561 int txq_id = SEQ_TO_QUEUE(sequence);
562 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
563 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
564 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
565 u32 status = le16_to_cpu(tx_resp->status.status);
566 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
567 struct iwl_mvm_sta *mvmsta;
568 struct sk_buff_head skbs;
569 u8 skb_freed = 0;
570 u16 next_reclaimed, seq_ctl;
571
572 __skb_queue_head_init(&skbs);
573
574 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
575
576 /* we can free until ssn % q.n_bd not inclusive */
577 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
578
579 while (!skb_queue_empty(&skbs)) {
580 struct sk_buff *skb = __skb_dequeue(&skbs);
581 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
582
583 skb_freed++;
584
585 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
586
587 memset(&info->status, 0, sizeof(info->status));
588
589 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
590
591 /* inform mac80211 about what happened with the frame */
592 switch (status & TX_STATUS_MSK) {
593 case TX_STATUS_SUCCESS:
594 case TX_STATUS_DIRECT_DONE:
595 info->flags |= IEEE80211_TX_STAT_ACK;
596 break;
597 case TX_STATUS_FAIL_DEST_PS:
598 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
599 break;
600 default:
601 break;
602 }
603
604 info->status.rates[0].count = tx_resp->failure_frame + 1;
605 iwl_mvm_hwrate_to_tx_control(le32_to_cpu(tx_resp->initial_rate),
606 info);
607
608 /* Single frame failure in an AMPDU queue => send BAR */
609 if (txq_id >= IWL_FIRST_AMPDU_QUEUE &&
610 !(info->flags & IEEE80211_TX_STAT_ACK)) {
611 /* there must be only one skb in the skb_list */
612 WARN_ON_ONCE(skb_freed > 1 ||
613 !skb_queue_empty(&skbs));
614 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
615 }
616
617 /* W/A FW bug: seq_ctl is wrong when the queue is flushed */
618 if (status == TX_STATUS_FAIL_FIFO_FLUSHED) {
619 struct ieee80211_hdr *hdr = (void *)skb->data;
620 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
621 }
622
623 ieee80211_tx_status(mvm->hw, skb);
624 }
625
626 if (txq_id >= IWL_FIRST_AMPDU_QUEUE) {
627 /* If this is an aggregation queue, we use the ssn since:
628 * ssn = wifi seq_num % 256.
629 * The seq_ctl is the sequence control of the packet to which
630 * this Tx response relates. But if there is a hole in the
631 * bitmap of the BA we received, this Tx response may allow to
632 * reclaim the hole and all the subsequent packets that were
633 * already acked. In that case, seq_ctl != ssn, and the next
634 * packet to be reclaimed will be ssn and not seq_ctl. In that
635 * case, several packets will be reclaimed even if
636 * frame_count = 1.
637 *
638 * The ssn is the index (% 256) of the latest packet that has
639 * treated (acked / dropped) + 1.
640 */
641 next_reclaimed = ssn;
642 } else {
643 /* The next packet to be reclaimed is the one after this one */
644 next_reclaimed = SEQ_TO_SN(seq_ctl + 0x10);
645 }
646
647 IWL_DEBUG_TX_REPLY(mvm,
648 "TXQ %d status %s (0x%08x)\n\t\t\t\tinitial_rate 0x%x "
649 "retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
650 txq_id, iwl_mvm_get_tx_fail_reason(status),
651 status, le32_to_cpu(tx_resp->initial_rate),
652 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
653 ssn, next_reclaimed, seq_ctl);
654
655 rcu_read_lock();
656
657 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
658
659 if (!IS_ERR_OR_NULL(sta)) {
660 mvmsta = (void *)sta->drv_priv;
661
662 if (tid != IWL_TID_NON_QOS) {
663 struct iwl_mvm_tid_data *tid_data =
664 &mvmsta->tid_data[tid];
665
666 spin_lock(&mvmsta->lock);
667 tid_data->next_reclaimed = next_reclaimed;
668 IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n",
669 next_reclaimed);
670 iwl_mvm_check_ratid_empty(mvm, sta, tid);
671 spin_unlock(&mvmsta->lock);
672 }
673
674 #ifdef CONFIG_PM_SLEEP
675 mvmsta->last_seq_ctl = seq_ctl;
676 #endif
677 } else {
678 sta = NULL;
679 mvmsta = NULL;
680 }
681
682 /*
683 * If the txq is not an AMPDU queue, there is no chance we freed
684 * several skbs. Check that out...
685 * If there are no pending frames for this STA, notify mac80211 that
686 * this station can go to sleep in its STA table.
687 */
688 if (txq_id < IWL_FIRST_AMPDU_QUEUE && mvmsta &&
689 !WARN_ON(skb_freed > 1) &&
690 mvmsta->vif->type == NL80211_IFTYPE_AP &&
691 atomic_sub_and_test(skb_freed, &mvmsta->pending_frames)) {
692 ieee80211_sta_block_awake(mvm->hw, sta, false);
693 set_bit(sta_id, mvm->sta_drained);
694 schedule_work(&mvm->sta_drained_wk);
695 }
696
697 rcu_read_unlock();
698 }
699
700 #ifdef CONFIG_IWLWIFI_DEBUG
701 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
702 static const char *iwl_get_agg_tx_status(u16 status)
703 {
704 switch (status & AGG_TX_STATE_STATUS_MSK) {
705 AGG_TX_STATE_(TRANSMITTED);
706 AGG_TX_STATE_(UNDERRUN);
707 AGG_TX_STATE_(BT_PRIO);
708 AGG_TX_STATE_(FEW_BYTES);
709 AGG_TX_STATE_(ABORT);
710 AGG_TX_STATE_(LAST_SENT_TTL);
711 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
712 AGG_TX_STATE_(LAST_SENT_BT_KILL);
713 AGG_TX_STATE_(SCD_QUERY);
714 AGG_TX_STATE_(TEST_BAD_CRC32);
715 AGG_TX_STATE_(RESPONSE);
716 AGG_TX_STATE_(DUMP_TX);
717 AGG_TX_STATE_(DELAY_TX);
718 }
719
720 return "UNKNOWN";
721 }
722
723 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
724 struct iwl_rx_packet *pkt)
725 {
726 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
727 struct agg_tx_status *frame_status = &tx_resp->status;
728 int i;
729
730 for (i = 0; i < tx_resp->frame_count; i++) {
731 u16 fstatus = le16_to_cpu(frame_status[i].status);
732
733 IWL_DEBUG_TX_REPLY(mvm,
734 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
735 iwl_get_agg_tx_status(fstatus),
736 fstatus & AGG_TX_STATE_STATUS_MSK,
737 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
738 AGG_TX_STATE_TRY_CNT_POS,
739 le16_to_cpu(frame_status[i].sequence));
740 }
741 }
742 #else
743 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
744 struct iwl_rx_packet *pkt)
745 {}
746 #endif /* CONFIG_IWLWIFI_DEBUG */
747
748 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
749 struct iwl_rx_packet *pkt)
750 {
751 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
752 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
753 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
754 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
755 struct ieee80211_sta *sta;
756
757 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < IWL_FIRST_AMPDU_QUEUE))
758 return;
759
760 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
761 return;
762
763 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
764
765 rcu_read_lock();
766
767 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
768
769 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
770 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
771 mvmsta->tid_data[tid].rate_n_flags =
772 le32_to_cpu(tx_resp->initial_rate);
773 }
774
775 rcu_read_unlock();
776 }
777
778 int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
779 struct iwl_device_cmd *cmd)
780 {
781 struct iwl_rx_packet *pkt = rxb_addr(rxb);
782 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
783
784 if (tx_resp->frame_count == 1)
785 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
786 else
787 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
788
789 return 0;
790 }
791
792 int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
793 struct iwl_device_cmd *cmd)
794 {
795 struct iwl_rx_packet *pkt = rxb_addr(rxb);
796 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
797 struct sk_buff_head reclaimed_skbs;
798 struct iwl_mvm_tid_data *tid_data;
799 struct ieee80211_tx_info *info;
800 struct ieee80211_sta *sta;
801 struct iwl_mvm_sta *mvmsta;
802 struct ieee80211_hdr *hdr;
803 struct sk_buff *skb;
804 int sta_id, tid, freed;
805
806 /* "flow" corresponds to Tx queue */
807 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
808
809 /* "ssn" is start of block-ack Tx window, corresponds to index
810 * (in Tx queue's circular buffer) of first TFD/frame in window */
811 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
812
813 sta_id = ba_notif->sta_id;
814 tid = ba_notif->tid;
815
816 rcu_read_lock();
817
818 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
819
820 /* Reclaiming frames for a station that has been deleted ? */
821 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
822 rcu_read_unlock();
823 return 0;
824 }
825
826 mvmsta = (void *)sta->drv_priv;
827 tid_data = &mvmsta->tid_data[tid];
828
829 if (WARN_ONCE(tid_data->txq_id != scd_flow, "Q %d, tid %d, flow %d",
830 tid_data->txq_id, tid, scd_flow)) {
831 rcu_read_unlock();
832 return 0;
833 }
834
835 spin_lock(&mvmsta->lock);
836
837 __skb_queue_head_init(&reclaimed_skbs);
838
839 /*
840 * Release all TFDs before the SSN, i.e. all TFDs in front of
841 * block-ack window (we assume that they've been successfully
842 * transmitted ... if not, it's too late anyway).
843 */
844 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
845 &reclaimed_skbs);
846
847 IWL_DEBUG_TX_REPLY(mvm,
848 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
849 (u8 *)&ba_notif->sta_addr_lo32,
850 ba_notif->sta_id);
851 IWL_DEBUG_TX_REPLY(mvm,
852 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
853 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
854 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
855 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
856 ba_notif->txed_2_done);
857
858 tid_data->next_reclaimed = ba_resp_scd_ssn;
859
860 iwl_mvm_check_ratid_empty(mvm, sta, tid);
861
862 freed = 0;
863
864 skb_queue_walk(&reclaimed_skbs, skb) {
865 hdr = (struct ieee80211_hdr *)skb->data;
866
867 if (ieee80211_is_data_qos(hdr->frame_control))
868 freed++;
869 else
870 WARN_ON_ONCE(1);
871
872 info = IEEE80211_SKB_CB(skb);
873 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
874
875 if (freed == 1) {
876 /* this is the first skb we deliver in this batch */
877 /* put the rate scaling data there */
878 info = IEEE80211_SKB_CB(skb);
879 memset(&info->status, 0, sizeof(info->status));
880 info->flags |= IEEE80211_TX_STAT_ACK;
881 info->flags |= IEEE80211_TX_STAT_AMPDU;
882 info->status.ampdu_ack_len = ba_notif->txed_2_done;
883 info->status.ampdu_len = ba_notif->txed;
884 iwl_mvm_hwrate_to_tx_control(tid_data->rate_n_flags,
885 info);
886 }
887 }
888
889 spin_unlock(&mvmsta->lock);
890
891 rcu_read_unlock();
892
893 while (!skb_queue_empty(&reclaimed_skbs)) {
894 skb = __skb_dequeue(&reclaimed_skbs);
895 ieee80211_tx_status(mvm->hw, skb);
896 }
897
898 return 0;
899 }
900
901 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync)
902 {
903 int ret;
904 struct iwl_tx_path_flush_cmd flush_cmd = {
905 .queues_ctl = cpu_to_le32(tfd_msk),
906 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
907 };
908
909 u32 flags = sync ? CMD_SYNC : CMD_ASYNC;
910
911 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
912 sizeof(flush_cmd), &flush_cmd);
913 if (ret)
914 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
915 return ret;
916 }
Linux kernel - Deliverables
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