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iwlwifi: mvm: Change AM->PSM timeout for EAPOL frames
[linux-2.6.git] / drivers / net / wireless / iwlwifi / mvm / tx.c
blob7694b8fa4c377565aee193c37f09396fb0a43c78
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 COPYING.
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 if (skb->protocol == cpu_to_be16(ETH_P_PAE)) {
127 tx_cmd->pm_frame_timeout = cpu_to_le16(2);
128 } else {
129 tx_cmd->pm_frame_timeout = 0;
130 }
131
132 if (info->flags & IEEE80211_TX_CTL_AMPDU)
133 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
134
135 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
136 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
137 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
138
139 tx_cmd->driver_txop = 0;
140 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
141 /* Total # bytes to be transmitted */
142 tx_cmd->len = cpu_to_le16((u16)skb->len);
143 tx_cmd->next_frame_len = 0;
144 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
145 tx_cmd->sta_id = sta_id;
146 }
147
148 /*
149 * Sets the fields in the Tx cmd that are rate related
150 */
151 static void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm,
152 struct iwl_tx_cmd *tx_cmd,
153 struct ieee80211_tx_info *info,
154 struct ieee80211_sta *sta,
155 __le16 fc)
156 {
157 u32 rate_flags;
158 int rate_idx;
159 u8 rate_plcp;
160
161 /* Set retry limit on RTS packets */
162 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
163
164 /* Set retry limit on DATA packets and Probe Responses*/
165 if (ieee80211_is_probe_resp(fc)) {
166 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
167 tx_cmd->rts_retry_limit =
168 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
169 } else if (ieee80211_is_back_req(fc)) {
170 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
171 } else {
172 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
173 }
174
175 /*
176 * for data packets, rate info comes from the table inside he fw. This
177 * table is controlled by LINK_QUALITY commands
178 */
179
180 if (ieee80211_is_data(fc) && sta) {
181 tx_cmd->initial_rate_index = 0;
182 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
183 return;
184 } else if (ieee80211_is_back_req(fc)) {
185 tx_cmd->tx_flags |=
186 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
187 }
188
189 /* HT rate doesn't make sense for a non data frame */
190 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
191 "Got an HT rate for a non data frame 0x%x\n",
192 info->control.rates[0].flags);
193
194 rate_idx = info->control.rates[0].idx;
195 /* if the rate isn't a well known legacy rate, take the lowest one */
196 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
197 rate_idx = rate_lowest_index(
198 &mvm->nvm_data->bands[info->band], sta);
199
200 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
201 if (info->band == IEEE80211_BAND_5GHZ)
202 rate_idx += IWL_FIRST_OFDM_RATE;
203
204 /* For 2.4 GHZ band, check that there is no need to remap */
205 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
206
207 /* Get PLCP rate for tx_cmd->rate_n_flags */
208 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
209
210 mvm->mgmt_last_antenna_idx =
211 iwl_mvm_next_antenna(mvm, iwl_fw_valid_tx_ant(mvm->fw),
212 mvm->mgmt_last_antenna_idx);
213 rate_flags = BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
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 */
226 static 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:
257 IWL_ERR(mvm, "Unknown encode cipher %x\n", keyconf->cipher);
258 break;
259 }
260 }
261
262 /*
263 * Allocates and sets the Tx cmd the driver data pointers in the skb
264 */
265 static struct iwl_device_cmd *
266 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
267 struct ieee80211_sta *sta, u8 sta_id)
268 {
269 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
270 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
271 struct iwl_device_cmd *dev_cmd;
272 struct iwl_tx_cmd *tx_cmd;
273
274 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
275
276 if (unlikely(!dev_cmd))
277 return NULL;
278
279 memset(dev_cmd, 0, sizeof(*dev_cmd));
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
297 int 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 */
351 int 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
365 mvmsta = (void *)sta->drv_priv;
366 fc = hdr->frame_control;
367
368 if (WARN_ON_ONCE(!mvmsta))
369 return -1;
370
371 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
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
381 spin_lock(&mvmsta->lock);
382
383 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
384 u8 *qc = NULL;
385 qc = ieee80211_get_qos_ctl(hdr);
386 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
387 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
388 goto drop_unlock_sta;
389
390 seq_number = mvmsta->tid_data[tid].seq_number;
391 seq_number &= IEEE80211_SCTL_SEQ;
392 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
393 hdr->seq_ctrl |= cpu_to_le16(seq_number);
394 seq_number += 0x10;
395 is_data_qos = true;
396 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
397 }
398
399 /* Copy MAC header from skb into command buffer */
400 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(fc));
401
402 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
403
404 if (is_ampdu) {
405 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
406 goto drop_unlock_sta;
407 txq_id = mvmsta->tid_data[tid].txq_id;
408 }
409
410 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
411 tid, txq_id, seq_number);
412
413 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
414 goto drop_unlock_sta;
415
416 if (is_data_qos && !ieee80211_has_morefrags(fc))
417 mvmsta->tid_data[tid].seq_number = seq_number;
418
419 spin_unlock(&mvmsta->lock);
420
421 if (txq_id < IWL_MVM_FIRST_AGG_QUEUE)
422 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
423
424 return 0;
425
426 drop_unlock_sta:
427 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
428 spin_unlock(&mvmsta->lock);
429 drop:
430 return -1;
431 }
432
433 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
434 struct ieee80211_sta *sta, u8 tid)
435 {
436 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
437 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
438 struct ieee80211_vif *vif = mvmsta->vif;
439
440 lockdep_assert_held(&mvmsta->lock);
441
442 if (tid_data->ssn != tid_data->next_reclaimed)
443 return;
444
445 switch (tid_data->state) {
446 case IWL_EMPTYING_HW_QUEUE_ADDBA:
447 IWL_DEBUG_TX_QUEUES(mvm,
448 "Can continue addBA flow ssn = next_recl = %d\n",
449 tid_data->next_reclaimed);
450 tid_data->state = IWL_AGG_STARTING;
451 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
452 break;
453
454 case IWL_EMPTYING_HW_QUEUE_DELBA:
455 IWL_DEBUG_TX_QUEUES(mvm,
456 "Can continue DELBA flow ssn = next_recl = %d\n",
457 tid_data->next_reclaimed);
458 iwl_trans_txq_disable(mvm->trans, tid_data->txq_id);
459 tid_data->state = IWL_AGG_OFF;
460 /*
461 * we can't hold the mutex - but since we are after a sequence
462 * point (call to iwl_trans_txq_disable), so we don't even need
463 * a memory barrier.
464 */
465 mvm->queue_to_mac80211[tid_data->txq_id] =
466 IWL_INVALID_MAC80211_QUEUE;
467 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
468 break;
469
470 default:
471 break;
472 }
473 }
474
475 #ifdef CONFIG_IWLWIFI_DEBUG
476 const char *iwl_mvm_get_tx_fail_reason(u32 status)
477 {
478 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
479 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
480
481 switch (status & TX_STATUS_MSK) {
482 case TX_STATUS_SUCCESS:
483 return "SUCCESS";
484 TX_STATUS_POSTPONE(DELAY);
485 TX_STATUS_POSTPONE(FEW_BYTES);
486 TX_STATUS_POSTPONE(BT_PRIO);
487 TX_STATUS_POSTPONE(QUIET_PERIOD);
488 TX_STATUS_POSTPONE(CALC_TTAK);
489 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
490 TX_STATUS_FAIL(SHORT_LIMIT);
491 TX_STATUS_FAIL(LONG_LIMIT);
492 TX_STATUS_FAIL(UNDERRUN);
493 TX_STATUS_FAIL(DRAIN_FLOW);
494 TX_STATUS_FAIL(RFKILL_FLUSH);
495 TX_STATUS_FAIL(LIFE_EXPIRE);
496 TX_STATUS_FAIL(DEST_PS);
497 TX_STATUS_FAIL(HOST_ABORTED);
498 TX_STATUS_FAIL(BT_RETRY);
499 TX_STATUS_FAIL(STA_INVALID);
500 TX_STATUS_FAIL(FRAG_DROPPED);
501 TX_STATUS_FAIL(TID_DISABLE);
502 TX_STATUS_FAIL(FIFO_FLUSHED);
503 TX_STATUS_FAIL(SMALL_CF_POLL);
504 TX_STATUS_FAIL(FW_DROP);
505 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
506 }
507
508 return "UNKNOWN";
509
510 #undef TX_STATUS_FAIL
511 #undef TX_STATUS_POSTPONE
512 }
513 #endif /* CONFIG_IWLWIFI_DEBUG */
514
515 /**
516 * translate ucode response to mac80211 tx status control values
517 */
518 static void iwl_mvm_hwrate_to_tx_control(u32 rate_n_flags,
519 struct ieee80211_tx_info *info)
520 {
521 struct ieee80211_tx_rate *r = &info->status.rates[0];
522
523 info->status.antenna =
524 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
525 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
526 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
527 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
528 case RATE_MCS_CHAN_WIDTH_20:
529 break;
530 case RATE_MCS_CHAN_WIDTH_40:
531 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
532 break;
533 case RATE_MCS_CHAN_WIDTH_80:
534 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
535 break;
536 case RATE_MCS_CHAN_WIDTH_160:
537 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
538 break;
539 }
540 if (rate_n_flags & RATE_MCS_SGI_MSK)
541 r->flags |= IEEE80211_TX_RC_SHORT_GI;
542 if (rate_n_flags & RATE_MCS_HT_MSK) {
543 r->flags |= IEEE80211_TX_RC_MCS;
544 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
545 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
546 ieee80211_rate_set_vht(
547 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
548 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
549 RATE_VHT_MCS_NSS_POS) + 1);
550 r->flags |= IEEE80211_TX_RC_VHT_MCS;
551 } else {
552 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
553 info->band);
554 }
555 }
556
557 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
558 struct iwl_rx_packet *pkt)
559 {
560 struct ieee80211_sta *sta;
561 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
562 int txq_id = SEQ_TO_QUEUE(sequence);
563 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
564 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
565 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
566 u32 status = le16_to_cpu(tx_resp->status.status);
567 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
568 struct iwl_mvm_sta *mvmsta;
569 struct sk_buff_head skbs;
570 u8 skb_freed = 0;
571 u16 next_reclaimed, seq_ctl;
572
573 __skb_queue_head_init(&skbs);
574
575 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
576
577 /* we can free until ssn % q.n_bd not inclusive */
578 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
579
580 while (!skb_queue_empty(&skbs)) {
581 struct sk_buff *skb = __skb_dequeue(&skbs);
582 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
583
584 skb_freed++;
585
586 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
587
588 memset(&info->status, 0, sizeof(info->status));
589
590 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
591
592 /* inform mac80211 about what happened with the frame */
593 switch (status & TX_STATUS_MSK) {
594 case TX_STATUS_SUCCESS:
595 case TX_STATUS_DIRECT_DONE:
596 info->flags |= IEEE80211_TX_STAT_ACK;
597 break;
598 case TX_STATUS_FAIL_DEST_PS:
599 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
600 break;
601 default:
602 break;
603 }
604
605 info->status.rates[0].count = tx_resp->failure_frame + 1;
606 iwl_mvm_hwrate_to_tx_control(le32_to_cpu(tx_resp->initial_rate),
607 info);
608
609 /* Single frame failure in an AMPDU queue => send BAR */
610 if (txq_id >= IWL_MVM_FIRST_AGG_QUEUE &&
611 !(info->flags & IEEE80211_TX_STAT_ACK))
612 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
613
614 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
615 if (status != TX_STATUS_SUCCESS) {
616 struct ieee80211_hdr *hdr = (void *)skb->data;
617 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
618 }
619
620 ieee80211_tx_status_ni(mvm->hw, skb);
621 }
622
623 if (txq_id >= IWL_MVM_FIRST_AGG_QUEUE) {
624 /* If this is an aggregation queue, we use the ssn since:
625 * ssn = wifi seq_num % 256.
626 * The seq_ctl is the sequence control of the packet to which
627 * this Tx response relates. But if there is a hole in the
628 * bitmap of the BA we received, this Tx response may allow to
629 * reclaim the hole and all the subsequent packets that were
630 * already acked. In that case, seq_ctl != ssn, and the next
631 * packet to be reclaimed will be ssn and not seq_ctl. In that
632 * case, several packets will be reclaimed even if
633 * frame_count = 1.
634 *
635 * The ssn is the index (% 256) of the latest packet that has
636 * treated (acked / dropped) + 1.
637 */
638 next_reclaimed = ssn;
639 } else {
640 /* The next packet to be reclaimed is the one after this one */
641 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
642 }
643
644 IWL_DEBUG_TX_REPLY(mvm,
645 "TXQ %d status %s (0x%08x)\n",
646 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
647
648 IWL_DEBUG_TX_REPLY(mvm,
649 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
650 le32_to_cpu(tx_resp->initial_rate),
651 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
652 ssn, next_reclaimed, seq_ctl);
653
654 rcu_read_lock();
655
656 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
657
658 if (!IS_ERR_OR_NULL(sta)) {
659 mvmsta = (void *)sta->drv_priv;
660
661 if (tid != IWL_TID_NON_QOS) {
662 struct iwl_mvm_tid_data *tid_data =
663 &mvmsta->tid_data[tid];
664
665 spin_lock_bh(&mvmsta->lock);
666 tid_data->next_reclaimed = next_reclaimed;
667 IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n",
668 next_reclaimed);
669 iwl_mvm_check_ratid_empty(mvm, sta, tid);
670 spin_unlock_bh(&mvmsta->lock);
671 }
672
673 #ifdef CONFIG_PM_SLEEP
674 mvmsta->last_seq_ctl = seq_ctl;
675 #endif
676 } else {
677 sta = NULL;
678 mvmsta = NULL;
679 }
680
681 /*
682 * If the txq is not an AMPDU queue, there is no chance we freed
683 * several skbs. Check that out...
684 */
685 if (txq_id < IWL_MVM_FIRST_AGG_QUEUE && !WARN_ON(skb_freed > 1) &&
686 atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) {
687 if (mvmsta) {
688 /*
689 * If there are no pending frames for this STA, notify
690 * mac80211 that this station can go to sleep in its
691 * STA table.
692 */
693 if (mvmsta->vif->type == NL80211_IFTYPE_AP)
694 ieee80211_sta_block_awake(mvm->hw, sta, false);
695 /*
696 * We might very well have taken mvmsta pointer while
697 * the station was being removed. The remove flow might
698 * have seen a pending_frame (because we didn't take
699 * the lock) even if now the queues are drained. So make
700 * really sure now that this the station is not being
701 * removed. If it is, run the drain worker to remove it.
702 */
703 spin_lock_bh(&mvmsta->lock);
704 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
705 if (IS_ERR_OR_NULL(sta)) {
706 /*
707 * Station disappeared in the meantime:
708 * so we are draining.
709 */
710 set_bit(sta_id, mvm->sta_drained);
711 schedule_work(&mvm->sta_drained_wk);
712 }
713 spin_unlock_bh(&mvmsta->lock);
714 } else if (!mvmsta) {
715 /* Tx response without STA, so we are draining */
716 set_bit(sta_id, mvm->sta_drained);
717 schedule_work(&mvm->sta_drained_wk);
718 }
719 }
720
721 rcu_read_unlock();
722 }
723
724 #ifdef CONFIG_IWLWIFI_DEBUG
725 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
726 static const char *iwl_get_agg_tx_status(u16 status)
727 {
728 switch (status & AGG_TX_STATE_STATUS_MSK) {
729 AGG_TX_STATE_(TRANSMITTED);
730 AGG_TX_STATE_(UNDERRUN);
731 AGG_TX_STATE_(BT_PRIO);
732 AGG_TX_STATE_(FEW_BYTES);
733 AGG_TX_STATE_(ABORT);
734 AGG_TX_STATE_(LAST_SENT_TTL);
735 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
736 AGG_TX_STATE_(LAST_SENT_BT_KILL);
737 AGG_TX_STATE_(SCD_QUERY);
738 AGG_TX_STATE_(TEST_BAD_CRC32);
739 AGG_TX_STATE_(RESPONSE);
740 AGG_TX_STATE_(DUMP_TX);
741 AGG_TX_STATE_(DELAY_TX);
742 }
743
744 return "UNKNOWN";
745 }
746
747 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
748 struct iwl_rx_packet *pkt)
749 {
750 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
751 struct agg_tx_status *frame_status = &tx_resp->status;
752 int i;
753
754 for (i = 0; i < tx_resp->frame_count; i++) {
755 u16 fstatus = le16_to_cpu(frame_status[i].status);
756
757 IWL_DEBUG_TX_REPLY(mvm,
758 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
759 iwl_get_agg_tx_status(fstatus),
760 fstatus & AGG_TX_STATE_STATUS_MSK,
761 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
762 AGG_TX_STATE_TRY_CNT_POS,
763 le16_to_cpu(frame_status[i].sequence));
764 }
765 }
766 #else
767 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
768 struct iwl_rx_packet *pkt)
769 {}
770 #endif /* CONFIG_IWLWIFI_DEBUG */
771
772 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
773 struct iwl_rx_packet *pkt)
774 {
775 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
776 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
777 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
778 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
779 struct ieee80211_sta *sta;
780
781 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < IWL_MVM_FIRST_AGG_QUEUE))
782 return;
783
784 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
785 return;
786
787 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
788
789 rcu_read_lock();
790
791 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
792
793 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
794 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
795 mvmsta->tid_data[tid].rate_n_flags =
796 le32_to_cpu(tx_resp->initial_rate);
797 }
798
799 rcu_read_unlock();
800 }
801
802 int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
803 struct iwl_device_cmd *cmd)
804 {
805 struct iwl_rx_packet *pkt = rxb_addr(rxb);
806 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
807
808 if (tx_resp->frame_count == 1)
809 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
810 else
811 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
812
813 return 0;
814 }
815
816 int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
817 struct iwl_device_cmd *cmd)
818 {
819 struct iwl_rx_packet *pkt = rxb_addr(rxb);
820 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
821 struct sk_buff_head reclaimed_skbs;
822 struct iwl_mvm_tid_data *tid_data;
823 struct ieee80211_tx_info *info;
824 struct ieee80211_sta *sta;
825 struct iwl_mvm_sta *mvmsta;
826 struct ieee80211_hdr *hdr;
827 struct sk_buff *skb;
828 int sta_id, tid, freed;
829
830 /* "flow" corresponds to Tx queue */
831 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
832
833 /* "ssn" is start of block-ack Tx window, corresponds to index
834 * (in Tx queue's circular buffer) of first TFD/frame in window */
835 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
836
837 sta_id = ba_notif->sta_id;
838 tid = ba_notif->tid;
839
840 rcu_read_lock();
841
842 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
843
844 /* Reclaiming frames for a station that has been deleted ? */
845 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
846 rcu_read_unlock();
847 return 0;
848 }
849
850 mvmsta = (void *)sta->drv_priv;
851 tid_data = &mvmsta->tid_data[tid];
852
853 if (WARN_ONCE(tid_data->txq_id != scd_flow, "Q %d, tid %d, flow %d",
854 tid_data->txq_id, tid, scd_flow)) {
855 rcu_read_unlock();
856 return 0;
857 }
858
859 spin_lock_bh(&mvmsta->lock);
860
861 __skb_queue_head_init(&reclaimed_skbs);
862
863 /*
864 * Release all TFDs before the SSN, i.e. all TFDs in front of
865 * block-ack window (we assume that they've been successfully
866 * transmitted ... if not, it's too late anyway).
867 */
868 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
869 &reclaimed_skbs);
870
871 IWL_DEBUG_TX_REPLY(mvm,
872 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
873 (u8 *)&ba_notif->sta_addr_lo32,
874 ba_notif->sta_id);
875 IWL_DEBUG_TX_REPLY(mvm,
876 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
877 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
878 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
879 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
880 ba_notif->txed_2_done);
881
882 tid_data->next_reclaimed = ba_resp_scd_ssn;
883
884 iwl_mvm_check_ratid_empty(mvm, sta, tid);
885
886 freed = 0;
887
888 skb_queue_walk(&reclaimed_skbs, skb) {
889 hdr = (struct ieee80211_hdr *)skb->data;
890
891 if (ieee80211_is_data_qos(hdr->frame_control))
892 freed++;
893 else
894 WARN_ON_ONCE(1);
895
896 info = IEEE80211_SKB_CB(skb);
897 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
898
899 if (freed == 1) {
900 /* this is the first skb we deliver in this batch */
901 /* put the rate scaling data there */
902 info = IEEE80211_SKB_CB(skb);
903 memset(&info->status, 0, sizeof(info->status));
904 info->flags |= IEEE80211_TX_STAT_ACK;
905 info->flags |= IEEE80211_TX_STAT_AMPDU;
906 info->status.ampdu_ack_len = ba_notif->txed_2_done;
907 info->status.ampdu_len = ba_notif->txed;
908 iwl_mvm_hwrate_to_tx_control(tid_data->rate_n_flags,
909 info);
910 }
911 }
912
913 spin_unlock_bh(&mvmsta->lock);
914
915 rcu_read_unlock();
916
917 while (!skb_queue_empty(&reclaimed_skbs)) {
918 skb = __skb_dequeue(&reclaimed_skbs);
919 ieee80211_tx_status_ni(mvm->hw, skb);
920 }
921
922 return 0;
923 }
924
925 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync)
926 {
927 int ret;
928 struct iwl_tx_path_flush_cmd flush_cmd = {
929 .queues_ctl = cpu_to_le32(tfd_msk),
930 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
931 };
932
933 u32 flags = sync ? CMD_SYNC : CMD_ASYNC;
934
935 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
936 sizeof(flush_cmd), &flush_cmd);
937 if (ret)
938 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
939 return ret;
940 }
Linus' kernel tree