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fix a kmap leak in virtio_console
[linux/fpc-iii.git] / drivers / net / wireless / iwlwifi / mvm / tx.c
blob90378c217bc76bba6a10a4d8bf0d02e8005f4673
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 - 2014 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 - 2014 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 (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO ||
96 is_multicast_ether_addr(hdr->addr1) ||
97 ieee80211_is_back_req(fc) || ieee80211_is_mgmt(fc)))
98 tx_flags |= TX_CMD_FLG_BT_DIS;
99
100 if (ieee80211_has_morefrags(fc))
101 tx_flags |= TX_CMD_FLG_MORE_FRAG;
102
103 if (ieee80211_is_data_qos(fc)) {
104 u8 *qc = ieee80211_get_qos_ctl(hdr);
105 tx_cmd->tid_tspec = qc[0] & 0xf;
106 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
107 } else {
108 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
109 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
110 tx_flags |= TX_CMD_FLG_SEQ_CTL;
111 else
112 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
113 }
114
115 if (ieee80211_is_mgmt(fc)) {
116 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
117 tx_cmd->pm_frame_timeout = cpu_to_le16(3);
118 else
119 tx_cmd->pm_frame_timeout = cpu_to_le16(2);
120
121 /* The spec allows Action frames in A-MPDU, we don't support
122 * it
123 */
124 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
125 } else if (skb->protocol == cpu_to_be16(ETH_P_PAE)) {
126 tx_cmd->pm_frame_timeout = cpu_to_le16(2);
127 } else {
128 tx_cmd->pm_frame_timeout = 0;
129 }
130
131 if (info->flags & IEEE80211_TX_CTL_AMPDU)
132 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
133
134 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
135 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
136 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
137
138 tx_cmd->driver_txop = 0;
139 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
140 /* Total # bytes to be transmitted */
141 tx_cmd->len = cpu_to_le16((u16)skb->len);
142 tx_cmd->next_frame_len = 0;
143 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
144 tx_cmd->sta_id = sta_id;
145 }
146
147 /*
148 * Sets the fields in the Tx cmd that are rate related
149 */
150 static void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm,
151 struct iwl_tx_cmd *tx_cmd,
152 struct ieee80211_tx_info *info,
153 struct ieee80211_sta *sta,
154 __le16 fc)
155 {
156 u32 rate_flags;
157 int rate_idx;
158 u8 rate_plcp;
159
160 /* Set retry limit on RTS packets */
161 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
162
163 /* Set retry limit on DATA packets and Probe Responses*/
164 if (ieee80211_is_probe_resp(fc)) {
165 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
166 tx_cmd->rts_retry_limit =
167 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
168 } else if (ieee80211_is_back_req(fc)) {
169 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
170 } else {
171 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
172 }
173
174 /*
175 * for data packets, rate info comes from the table inside the fw. This
176 * table is controlled by LINK_QUALITY commands
177 */
178
179 if (ieee80211_is_data(fc) && sta) {
180 tx_cmd->initial_rate_index = 0;
181 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
182 return;
183 } else if (ieee80211_is_back_req(fc)) {
184 tx_cmd->tx_flags |=
185 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
186 }
187
188 /* HT rate doesn't make sense for a non data frame */
189 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
190 "Got an HT rate for a non data frame 0x%x\n",
191 info->control.rates[0].flags);
192
193 rate_idx = info->control.rates[0].idx;
194 /* if the rate isn't a well known legacy rate, take the lowest one */
195 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
196 rate_idx = rate_lowest_index(
197 &mvm->nvm_data->bands[info->band], sta);
198
199 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
200 if (info->band == IEEE80211_BAND_5GHZ)
201 rate_idx += IWL_FIRST_OFDM_RATE;
202
203 /* For 2.4 GHZ band, check that there is no need to remap */
204 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
205
206 /* Get PLCP rate for tx_cmd->rate_n_flags */
207 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
208
209 mvm->mgmt_last_antenna_idx =
210 iwl_mvm_next_antenna(mvm, iwl_fw_valid_tx_ant(mvm->fw),
211 mvm->mgmt_last_antenna_idx);
212 rate_flags = BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
213
214 /* Set CCK flag as needed */
215 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
216 rate_flags |= RATE_MCS_CCK_MSK;
217
218 /* Set the rate in the TX cmd */
219 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
220 }
221
222 /*
223 * Sets the fields in the Tx cmd that are crypto related
224 */
225 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
226 struct ieee80211_tx_info *info,
227 struct iwl_tx_cmd *tx_cmd,
228 struct sk_buff *skb_frag)
229 {
230 struct ieee80211_key_conf *keyconf = info->control.hw_key;
231
232 switch (keyconf->cipher) {
233 case WLAN_CIPHER_SUITE_CCMP:
234 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
235 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
236 if (info->flags & IEEE80211_TX_CTL_AMPDU)
237 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_CCMP_AGG);
238 break;
239
240 case WLAN_CIPHER_SUITE_TKIP:
241 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
242 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
243 break;
244
245 case WLAN_CIPHER_SUITE_WEP104:
246 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
247 /* fall through */
248 case WLAN_CIPHER_SUITE_WEP40:
249 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
250 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
251 TX_CMD_SEC_WEP_KEY_IDX_MSK);
252
253 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
254 break;
255 default:
256 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
257 }
258 }
259
260 /*
261 * Allocates and sets the Tx cmd the driver data pointers in the skb
262 */
263 static struct iwl_device_cmd *
264 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
265 struct ieee80211_sta *sta, u8 sta_id)
266 {
267 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
268 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
269 struct iwl_device_cmd *dev_cmd;
270 struct iwl_tx_cmd *tx_cmd;
271
272 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
273
274 if (unlikely(!dev_cmd))
275 return NULL;
276
277 memset(dev_cmd, 0, sizeof(*dev_cmd));
278 dev_cmd->hdr.cmd = TX_CMD;
279 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
280
281 if (info->control.hw_key)
282 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb);
283
284 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
285
286 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
287
288 memset(&info->status, 0, sizeof(info->status));
289
290 info->driver_data[0] = NULL;
291 info->driver_data[1] = dev_cmd;
292
293 return dev_cmd;
294 }
295
296 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
297 {
298 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
299 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
300 struct iwl_device_cmd *dev_cmd;
301 struct iwl_tx_cmd *tx_cmd;
302 u8 sta_id;
303
304 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU))
305 return -1;
306
307 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
308 (!info->control.vif ||
309 info->hw_queue != info->control.vif->cab_queue)))
310 return -1;
311
312 /*
313 * If the interface on which frame is sent is the P2P_DEVICE
314 * or an AP/GO interface use the broadcast station associated
315 * with it; otherwise use the AUX station.
316 */
317 if (info->control.vif &&
318 (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
319 info->control.vif->type == NL80211_IFTYPE_AP)) {
320 struct iwl_mvm_vif *mvmvif =
321 iwl_mvm_vif_from_mac80211(info->control.vif);
322 sta_id = mvmvif->bcast_sta.sta_id;
323 } else {
324 sta_id = mvm->aux_sta.sta_id;
325 }
326
327 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue);
328
329 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, NULL, sta_id);
330 if (!dev_cmd)
331 return -1;
332
333 /* From now on, we cannot access info->control */
334 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
335
336 /* Copy MAC header from skb into command buffer */
337 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(hdr->frame_control));
338
339 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) {
340 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
341 return -1;
342 }
343
344 return 0;
345 }
346
347 /*
348 * Sets the fields in the Tx cmd that are crypto related
349 */
350 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
351 struct ieee80211_sta *sta)
352 {
353 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
354 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
355 struct iwl_mvm_sta *mvmsta;
356 struct iwl_device_cmd *dev_cmd;
357 struct iwl_tx_cmd *tx_cmd;
358 __le16 fc;
359 u16 seq_number = 0;
360 u8 tid = IWL_MAX_TID_COUNT;
361 u8 txq_id = info->hw_queue;
362 bool is_data_qos = false, is_ampdu = false;
363
364 mvmsta = iwl_mvm_sta_from_mac80211(sta);
365 fc = hdr->frame_control;
366
367 if (WARN_ON_ONCE(!mvmsta))
368 return -1;
369
370 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
371 return -1;
372
373 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, sta, mvmsta->sta_id);
374 if (!dev_cmd)
375 goto drop;
376
377 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
378 /* From now on, we cannot access info->control */
379
380 spin_lock(&mvmsta->lock);
381
382 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
383 u8 *qc = NULL;
384 qc = ieee80211_get_qos_ctl(hdr);
385 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
386 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
387 goto drop_unlock_sta;
388
389 seq_number = mvmsta->tid_data[tid].seq_number;
390 seq_number &= IEEE80211_SCTL_SEQ;
391 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
392 hdr->seq_ctrl |= cpu_to_le16(seq_number);
393 is_data_qos = true;
394 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
395 }
396
397 /* Copy MAC header from skb into command buffer */
398 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(fc));
399
400 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
401
402 if (is_ampdu) {
403 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
404 goto drop_unlock_sta;
405 txq_id = mvmsta->tid_data[tid].txq_id;
406 }
407
408 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
409 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
410
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 + 0x10;
416
417 spin_unlock(&mvmsta->lock);
418
419 if (txq_id < mvm->first_agg_queue)
420 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
421
422 return 0;
423
424 drop_unlock_sta:
425 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
426 spin_unlock(&mvmsta->lock);
427 drop:
428 return -1;
429 }
430
431 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
432 struct ieee80211_sta *sta, u8 tid)
433 {
434 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
435 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
436 struct ieee80211_vif *vif = mvmsta->vif;
437
438 lockdep_assert_held(&mvmsta->lock);
439
440 if (tid_data->ssn != tid_data->next_reclaimed)
441 return;
442
443 switch (tid_data->state) {
444 case IWL_EMPTYING_HW_QUEUE_ADDBA:
445 IWL_DEBUG_TX_QUEUES(mvm,
446 "Can continue addBA flow ssn = next_recl = %d\n",
447 tid_data->next_reclaimed);
448 tid_data->state = IWL_AGG_STARTING;
449 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
450 break;
451
452 case IWL_EMPTYING_HW_QUEUE_DELBA:
453 IWL_DEBUG_TX_QUEUES(mvm,
454 "Can continue DELBA flow ssn = next_recl = %d\n",
455 tid_data->next_reclaimed);
456 iwl_trans_txq_disable(mvm->trans, tid_data->txq_id);
457 tid_data->state = IWL_AGG_OFF;
458 /*
459 * we can't hold the mutex - but since we are after a sequence
460 * point (call to iwl_trans_txq_disable), so we don't even need
461 * a memory barrier.
462 */
463 mvm->queue_to_mac80211[tid_data->txq_id] =
464 IWL_INVALID_MAC80211_QUEUE;
465 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
466 break;
467
468 default:
469 break;
470 }
471 }
472
473 #ifdef CONFIG_IWLWIFI_DEBUG
474 const char *iwl_mvm_get_tx_fail_reason(u32 status)
475 {
476 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
477 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
478
479 switch (status & TX_STATUS_MSK) {
480 case TX_STATUS_SUCCESS:
481 return "SUCCESS";
482 TX_STATUS_POSTPONE(DELAY);
483 TX_STATUS_POSTPONE(FEW_BYTES);
484 TX_STATUS_POSTPONE(BT_PRIO);
485 TX_STATUS_POSTPONE(QUIET_PERIOD);
486 TX_STATUS_POSTPONE(CALC_TTAK);
487 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
488 TX_STATUS_FAIL(SHORT_LIMIT);
489 TX_STATUS_FAIL(LONG_LIMIT);
490 TX_STATUS_FAIL(UNDERRUN);
491 TX_STATUS_FAIL(DRAIN_FLOW);
492 TX_STATUS_FAIL(RFKILL_FLUSH);
493 TX_STATUS_FAIL(LIFE_EXPIRE);
494 TX_STATUS_FAIL(DEST_PS);
495 TX_STATUS_FAIL(HOST_ABORTED);
496 TX_STATUS_FAIL(BT_RETRY);
497 TX_STATUS_FAIL(STA_INVALID);
498 TX_STATUS_FAIL(FRAG_DROPPED);
499 TX_STATUS_FAIL(TID_DISABLE);
500 TX_STATUS_FAIL(FIFO_FLUSHED);
501 TX_STATUS_FAIL(SMALL_CF_POLL);
502 TX_STATUS_FAIL(FW_DROP);
503 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
504 }
505
506 return "UNKNOWN";
507
508 #undef TX_STATUS_FAIL
509 #undef TX_STATUS_POSTPONE
510 }
511 #endif /* CONFIG_IWLWIFI_DEBUG */
512
513 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
514 enum ieee80211_band band,
515 struct ieee80211_tx_rate *r)
516 {
517 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
518 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
519 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
520 case RATE_MCS_CHAN_WIDTH_20:
521 break;
522 case RATE_MCS_CHAN_WIDTH_40:
523 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
524 break;
525 case RATE_MCS_CHAN_WIDTH_80:
526 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
527 break;
528 case RATE_MCS_CHAN_WIDTH_160:
529 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
530 break;
531 }
532 if (rate_n_flags & RATE_MCS_SGI_MSK)
533 r->flags |= IEEE80211_TX_RC_SHORT_GI;
534 if (rate_n_flags & RATE_MCS_HT_MSK) {
535 r->flags |= IEEE80211_TX_RC_MCS;
536 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
537 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
538 ieee80211_rate_set_vht(
539 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
540 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
541 RATE_VHT_MCS_NSS_POS) + 1);
542 r->flags |= IEEE80211_TX_RC_VHT_MCS;
543 } else {
544 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
545 band);
546 }
547 }
548
549 /**
550 * translate ucode response to mac80211 tx status control values
551 */
552 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
553 struct ieee80211_tx_info *info)
554 {
555 struct ieee80211_tx_rate *r = &info->status.rates[0];
556
557 info->status.antenna =
558 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
559 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
560 }
561
562 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
563 struct iwl_rx_packet *pkt)
564 {
565 struct ieee80211_sta *sta;
566 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
567 int txq_id = SEQ_TO_QUEUE(sequence);
568 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
569 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
570 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
571 u32 status = le16_to_cpu(tx_resp->status.status);
572 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
573 struct iwl_mvm_sta *mvmsta;
574 struct sk_buff_head skbs;
575 u8 skb_freed = 0;
576 u16 next_reclaimed, seq_ctl;
577
578 __skb_queue_head_init(&skbs);
579
580 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
581
582 /* we can free until ssn % q.n_bd not inclusive */
583 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
584
585 while (!skb_queue_empty(&skbs)) {
586 struct sk_buff *skb = __skb_dequeue(&skbs);
587 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
588
589 skb_freed++;
590
591 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
592
593 memset(&info->status, 0, sizeof(info->status));
594
595 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
596
597 /* inform mac80211 about what happened with the frame */
598 switch (status & TX_STATUS_MSK) {
599 case TX_STATUS_SUCCESS:
600 case TX_STATUS_DIRECT_DONE:
601 info->flags |= IEEE80211_TX_STAT_ACK;
602 break;
603 case TX_STATUS_FAIL_DEST_PS:
604 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
605 break;
606 default:
607 break;
608 }
609
610 info->status.rates[0].count = tx_resp->failure_frame + 1;
611 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
612 info);
613
614 /* Single frame failure in an AMPDU queue => send BAR */
615 if (txq_id >= mvm->first_agg_queue &&
616 !(info->flags & IEEE80211_TX_STAT_ACK))
617 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
618
619 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
620 if (status != TX_STATUS_SUCCESS) {
621 struct ieee80211_hdr *hdr = (void *)skb->data;
622 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
623 }
624
625 ieee80211_tx_status_ni(mvm->hw, skb);
626 }
627
628 if (txq_id >= mvm->first_agg_queue) {
629 /* If this is an aggregation queue, we use the ssn since:
630 * ssn = wifi seq_num % 256.
631 * The seq_ctl is the sequence control of the packet to which
632 * this Tx response relates. But if there is a hole in the
633 * bitmap of the BA we received, this Tx response may allow to
634 * reclaim the hole and all the subsequent packets that were
635 * already acked. In that case, seq_ctl != ssn, and the next
636 * packet to be reclaimed will be ssn and not seq_ctl. In that
637 * case, several packets will be reclaimed even if
638 * frame_count = 1.
639 *
640 * The ssn is the index (% 256) of the latest packet that has
641 * treated (acked / dropped) + 1.
642 */
643 next_reclaimed = ssn;
644 } else {
645 /* The next packet to be reclaimed is the one after this one */
646 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
647 }
648
649 IWL_DEBUG_TX_REPLY(mvm,
650 "TXQ %d status %s (0x%08x)\n",
651 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
652
653 IWL_DEBUG_TX_REPLY(mvm,
654 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
655 le32_to_cpu(tx_resp->initial_rate),
656 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
657 ssn, next_reclaimed, seq_ctl);
658
659 rcu_read_lock();
660
661 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
662
663 if (!IS_ERR_OR_NULL(sta)) {
664 mvmsta = iwl_mvm_sta_from_mac80211(sta);
665
666 if (tid != IWL_TID_NON_QOS) {
667 struct iwl_mvm_tid_data *tid_data =
668 &mvmsta->tid_data[tid];
669
670 spin_lock_bh(&mvmsta->lock);
671 tid_data->next_reclaimed = next_reclaimed;
672 IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n",
673 next_reclaimed);
674 iwl_mvm_check_ratid_empty(mvm, sta, tid);
675 spin_unlock_bh(&mvmsta->lock);
676 }
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 */
686 if (txq_id < mvm->first_agg_queue && !WARN_ON(skb_freed > 1) &&
687 atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) {
688 if (mvmsta) {
689 /*
690 * If there are no pending frames for this STA, notify
691 * mac80211 that this station can go to sleep in its
692 * STA table.
693 */
694 if (mvmsta->vif->type == NL80211_IFTYPE_AP)
695 ieee80211_sta_block_awake(mvm->hw, sta, false);
696 /*
697 * We might very well have taken mvmsta pointer while
698 * the station was being removed. The remove flow might
699 * have seen a pending_frame (because we didn't take
700 * the lock) even if now the queues are drained. So make
701 * really sure now that this the station is not being
702 * removed. If it is, run the drain worker to remove it.
703 */
704 spin_lock_bh(&mvmsta->lock);
705 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
706 if (!sta || PTR_ERR(sta) == -EBUSY) {
707 /*
708 * Station disappeared in the meantime:
709 * so we are draining.
710 */
711 set_bit(sta_id, mvm->sta_drained);
712 schedule_work(&mvm->sta_drained_wk);
713 }
714 spin_unlock_bh(&mvmsta->lock);
715 } else if (!mvmsta && PTR_ERR(sta) == -EBUSY) {
716 /* Tx response without STA, so we are draining */
717 set_bit(sta_id, mvm->sta_drained);
718 schedule_work(&mvm->sta_drained_wk);
719 }
720 }
721
722 rcu_read_unlock();
723 }
724
725 #ifdef CONFIG_IWLWIFI_DEBUG
726 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
727 static const char *iwl_get_agg_tx_status(u16 status)
728 {
729 switch (status & AGG_TX_STATE_STATUS_MSK) {
730 AGG_TX_STATE_(TRANSMITTED);
731 AGG_TX_STATE_(UNDERRUN);
732 AGG_TX_STATE_(BT_PRIO);
733 AGG_TX_STATE_(FEW_BYTES);
734 AGG_TX_STATE_(ABORT);
735 AGG_TX_STATE_(LAST_SENT_TTL);
736 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
737 AGG_TX_STATE_(LAST_SENT_BT_KILL);
738 AGG_TX_STATE_(SCD_QUERY);
739 AGG_TX_STATE_(TEST_BAD_CRC32);
740 AGG_TX_STATE_(RESPONSE);
741 AGG_TX_STATE_(DUMP_TX);
742 AGG_TX_STATE_(DELAY_TX);
743 }
744
745 return "UNKNOWN";
746 }
747
748 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
749 struct iwl_rx_packet *pkt)
750 {
751 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
752 struct agg_tx_status *frame_status = &tx_resp->status;
753 int i;
754
755 for (i = 0; i < tx_resp->frame_count; i++) {
756 u16 fstatus = le16_to_cpu(frame_status[i].status);
757
758 IWL_DEBUG_TX_REPLY(mvm,
759 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
760 iwl_get_agg_tx_status(fstatus),
761 fstatus & AGG_TX_STATE_STATUS_MSK,
762 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
763 AGG_TX_STATE_TRY_CNT_POS,
764 le16_to_cpu(frame_status[i].sequence));
765 }
766 }
767 #else
768 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
769 struct iwl_rx_packet *pkt)
770 {}
771 #endif /* CONFIG_IWLWIFI_DEBUG */
772
773 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
774 struct iwl_rx_packet *pkt)
775 {
776 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
777 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
778 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
779 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
780 struct ieee80211_sta *sta;
781
782 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue))
783 return;
784
785 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
786 return;
787
788 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
789
790 rcu_read_lock();
791
792 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
793
794 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
795 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
796 mvmsta->tid_data[tid].rate_n_flags =
797 le32_to_cpu(tx_resp->initial_rate);
798 }
799
800 rcu_read_unlock();
801 }
802
803 int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
804 struct iwl_device_cmd *cmd)
805 {
806 struct iwl_rx_packet *pkt = rxb_addr(rxb);
807 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
808
809 if (tx_resp->frame_count == 1)
810 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
811 else
812 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
813
814 return 0;
815 }
816
817 int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
818 struct iwl_device_cmd *cmd)
819 {
820 struct iwl_rx_packet *pkt = rxb_addr(rxb);
821 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
822 struct sk_buff_head reclaimed_skbs;
823 struct iwl_mvm_tid_data *tid_data;
824 struct ieee80211_tx_info *info;
825 struct ieee80211_sta *sta;
826 struct iwl_mvm_sta *mvmsta;
827 struct ieee80211_hdr *hdr;
828 struct sk_buff *skb;
829 int sta_id, tid, freed;
830
831 /* "flow" corresponds to Tx queue */
832 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
833
834 /* "ssn" is start of block-ack Tx window, corresponds to index
835 * (in Tx queue's circular buffer) of first TFD/frame in window */
836 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
837
838 sta_id = ba_notif->sta_id;
839 tid = ba_notif->tid;
840
841 rcu_read_lock();
842
843 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
844
845 /* Reclaiming frames for a station that has been deleted ? */
846 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
847 rcu_read_unlock();
848 return 0;
849 }
850
851 mvmsta = iwl_mvm_sta_from_mac80211(sta);
852 tid_data = &mvmsta->tid_data[tid];
853
854 if (WARN_ONCE(tid_data->txq_id != scd_flow, "Q %d, tid %d, flow %d",
855 tid_data->txq_id, tid, scd_flow)) {
856 rcu_read_unlock();
857 return 0;
858 }
859
860 spin_lock_bh(&mvmsta->lock);
861
862 __skb_queue_head_init(&reclaimed_skbs);
863
864 /*
865 * Release all TFDs before the SSN, i.e. all TFDs in front of
866 * block-ack window (we assume that they've been successfully
867 * transmitted ... if not, it's too late anyway).
868 */
869 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
870 &reclaimed_skbs);
871
872 IWL_DEBUG_TX_REPLY(mvm,
873 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
874 (u8 *)&ba_notif->sta_addr_lo32,
875 ba_notif->sta_id);
876 IWL_DEBUG_TX_REPLY(mvm,
877 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
878 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
879 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
880 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
881 ba_notif->txed_2_done);
882
883 tid_data->next_reclaimed = ba_resp_scd_ssn;
884
885 iwl_mvm_check_ratid_empty(mvm, sta, tid);
886
887 freed = 0;
888
889 skb_queue_walk(&reclaimed_skbs, skb) {
890 hdr = (struct ieee80211_hdr *)skb->data;
891
892 if (ieee80211_is_data_qos(hdr->frame_control))
893 freed++;
894 else
895 WARN_ON_ONCE(1);
896
897 info = IEEE80211_SKB_CB(skb);
898 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
899
900 if (freed == 1) {
901 /* this is the first skb we deliver in this batch */
902 /* put the rate scaling data there */
903 info = IEEE80211_SKB_CB(skb);
904 memset(&info->status, 0, sizeof(info->status));
905 info->flags |= IEEE80211_TX_STAT_ACK;
906 info->flags |= IEEE80211_TX_STAT_AMPDU;
907 info->status.ampdu_ack_len = ba_notif->txed_2_done;
908 info->status.ampdu_len = ba_notif->txed;
909 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
910 info);
911 }
912 }
913
914 spin_unlock_bh(&mvmsta->lock);
915
916 rcu_read_unlock();
917
918 while (!skb_queue_empty(&reclaimed_skbs)) {
919 skb = __skb_dequeue(&reclaimed_skbs);
920 ieee80211_tx_status_ni(mvm->hw, skb);
921 }
922
923 return 0;
924 }
925
926 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync)
927 {
928 int ret;
929 struct iwl_tx_path_flush_cmd flush_cmd = {
930 .queues_ctl = cpu_to_le32(tfd_msk),
931 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
932 };
933
934 u32 flags = sync ? CMD_SYNC : CMD_ASYNC;
935
936 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
937 sizeof(flush_cmd), &flush_cmd);
938 if (ret)
939 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
940 return ret;
941 }
Linux with added FPC-III support