1 /******************************************************************************
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.
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
28 * Contact Information:
29 * Intel Linux Wireless <ilw@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
36 * All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
42 * * Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * * Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in
46 * the documentation and/or other materials provided with the
48 * * Neither the name Intel Corporation nor the names of its
49 * contributors may be used to endorse or promote products derived
50 * from this software without specific prior written permission.
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
64 *****************************************************************************/
65 #include <linux/ieee80211.h>
66 #include <linux/etherdevice.h>
68 #include "iwl-trans.h"
69 #include "iwl-eeprom-parse.h"
74 * Sets most of the Tx cmd's fields
76 static void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
77 struct iwl_tx_cmd *tx_cmd,
78 struct ieee80211_tx_info *info, u8 sta_id)
80 struct ieee80211_hdr *hdr = (void *)skb->data;
81 __le16 fc = hdr->frame_control;
82 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
83 u32 len = skb->len + FCS_LEN;
86 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
87 tx_flags |= TX_CMD_FLG_ACK;
89 tx_flags &= ~TX_CMD_FLG_ACK;
91 if (ieee80211_is_probe_resp(fc))
92 tx_flags |= TX_CMD_FLG_TSF;
93 else if (ieee80211_is_back_req(fc))
94 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
96 if (ieee80211_has_morefrags(fc))
97 tx_flags |= TX_CMD_FLG_MORE_FRAG;
99 if (ieee80211_is_data_qos(fc)) {
100 u8 *qc = ieee80211_get_qos_ctl(hdr);
101 tx_cmd->tid_tspec = qc[0] & 0xf;
102 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
104 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
105 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
106 tx_flags |= TX_CMD_FLG_SEQ_CTL;
108 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
111 /* tid_tspec will default to 0 = BE when QOS isn't enabled */
112 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
113 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
114 TX_CMD_FLG_BT_PRIO_POS;
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);
120 tx_cmd->pm_frame_timeout = cpu_to_le16(2);
122 /* The spec allows Action frames in A-MPDU, we don't support
125 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
126 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
127 tx_cmd->pm_frame_timeout = cpu_to_le16(2);
129 tx_cmd->pm_frame_timeout = 0;
132 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
133 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
134 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
136 if ((mvm->fw->ucode_capa.capa[0] &
137 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
138 ieee80211_action_contains_tpc(skb))
139 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
141 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
142 /* Total # bytes to be transmitted */
143 tx_cmd->len = cpu_to_le16((u16)skb->len);
144 tx_cmd->next_frame_len = 0;
145 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
146 tx_cmd->sta_id = sta_id;
150 * Sets the fields in the Tx cmd that are rate related
152 static void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm,
153 struct iwl_tx_cmd *tx_cmd,
154 struct ieee80211_tx_info *info,
155 struct ieee80211_sta *sta,
162 /* Set retry limit on RTS packets */
163 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
165 /* Set retry limit on DATA packets and Probe Responses*/
166 if (ieee80211_is_probe_resp(fc)) {
167 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
168 tx_cmd->rts_retry_limit =
169 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
170 } else if (ieee80211_is_back_req(fc)) {
171 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
173 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
177 * for data packets, rate info comes from the table inside the fw. This
178 * table is controlled by LINK_QUALITY commands. Exclude ctrl port
179 * frames like EAPOLs which should be treated as mgmt frames. This
180 * avoids them being sent initially in high rates which increases the
181 * chances for completion of the 4-Way handshake.
184 if (ieee80211_is_data(fc) && sta &&
185 !(info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO)) {
186 tx_cmd->initial_rate_index = 0;
187 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
189 } else if (ieee80211_is_back_req(fc)) {
191 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
194 /* HT rate doesn't make sense for a non data frame */
195 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
196 "Got an HT rate for a non data frame 0x%x\n",
197 info->control.rates[0].flags);
199 rate_idx = info->control.rates[0].idx;
200 /* if the rate isn't a well known legacy rate, take the lowest one */
201 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
202 rate_idx = rate_lowest_index(
203 &mvm->nvm_data->bands[info->band], sta);
205 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
206 if (info->band == IEEE80211_BAND_5GHZ)
207 rate_idx += IWL_FIRST_OFDM_RATE;
209 /* For 2.4 GHZ band, check that there is no need to remap */
210 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
212 /* Get PLCP rate for tx_cmd->rate_n_flags */
213 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
215 mvm->mgmt_last_antenna_idx =
216 iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant,
217 mvm->mgmt_last_antenna_idx);
219 if (info->band == IEEE80211_BAND_2GHZ &&
220 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
221 rate_flags = BIT(mvm->cfg->non_shared_ant) << RATE_MCS_ANT_POS;
224 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
226 /* Set CCK flag as needed */
227 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
228 rate_flags |= RATE_MCS_CCK_MSK;
230 /* Set the rate in the TX cmd */
231 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
235 * Sets the fields in the Tx cmd that are crypto related
237 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
238 struct ieee80211_tx_info *info,
239 struct iwl_tx_cmd *tx_cmd,
240 struct sk_buff *skb_frag)
242 struct ieee80211_key_conf *keyconf = info->control.hw_key;
244 switch (keyconf->cipher) {
245 case WLAN_CIPHER_SUITE_CCMP:
246 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
247 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
248 if (info->flags & IEEE80211_TX_CTL_AMPDU)
249 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_CCMP_AGG);
252 case WLAN_CIPHER_SUITE_TKIP:
253 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
254 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
257 case WLAN_CIPHER_SUITE_WEP104:
258 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
260 case WLAN_CIPHER_SUITE_WEP40:
261 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
262 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
263 TX_CMD_SEC_WEP_KEY_IDX_MSK);
265 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
268 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
273 * Allocates and sets the Tx cmd the driver data pointers in the skb
275 static struct iwl_device_cmd *
276 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
277 struct ieee80211_sta *sta, u8 sta_id)
279 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
280 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
281 struct iwl_device_cmd *dev_cmd;
282 struct iwl_tx_cmd *tx_cmd;
284 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
286 if (unlikely(!dev_cmd))
289 memset(dev_cmd, 0, sizeof(*dev_cmd));
290 dev_cmd->hdr.cmd = TX_CMD;
291 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
293 if (info->control.hw_key)
294 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb);
296 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
298 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
300 memset(&info->status, 0, sizeof(info->status));
302 info->driver_data[0] = NULL;
303 info->driver_data[1] = dev_cmd;
308 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
310 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
311 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
312 struct iwl_device_cmd *dev_cmd;
313 struct iwl_tx_cmd *tx_cmd;
316 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU))
319 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
320 (!info->control.vif ||
321 info->hw_queue != info->control.vif->cab_queue)))
325 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
326 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
327 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
328 * and hence needs to be sent on the aux queue
330 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
331 info->control.vif->type == NL80211_IFTYPE_STATION)
332 IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue;
335 * If the interface on which frame is sent is the P2P_DEVICE
336 * or an AP/GO interface use the broadcast station associated
337 * with it; otherwise use the AUX station.
339 if (info->control.vif &&
340 (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
341 info->control.vif->type == NL80211_IFTYPE_AP)) {
342 struct iwl_mvm_vif *mvmvif =
343 iwl_mvm_vif_from_mac80211(info->control.vif);
344 sta_id = mvmvif->bcast_sta.sta_id;
346 sta_id = mvm->aux_sta.sta_id;
349 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue);
351 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, NULL, sta_id);
355 /* From now on, we cannot access info->control */
356 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
358 /* Copy MAC header from skb into command buffer */
359 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(hdr->frame_control));
361 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) {
362 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
370 * Sets the fields in the Tx cmd that are crypto related
372 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
373 struct ieee80211_sta *sta)
375 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
376 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
377 struct iwl_mvm_sta *mvmsta;
378 struct iwl_device_cmd *dev_cmd;
379 struct iwl_tx_cmd *tx_cmd;
382 u8 tid = IWL_MAX_TID_COUNT;
383 u8 txq_id = info->hw_queue;
384 bool is_data_qos = false, is_ampdu = false;
386 mvmsta = iwl_mvm_sta_from_mac80211(sta);
387 fc = hdr->frame_control;
389 if (WARN_ON_ONCE(!mvmsta))
392 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
395 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, sta, mvmsta->sta_id);
399 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
400 /* From now on, we cannot access info->control */
403 * we handle that entirely ourselves -- for uAPSD the firmware
404 * will always send a notification, and for PS-Poll responses
405 * we'll notify mac80211 when getting frame status
407 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
409 spin_lock(&mvmsta->lock);
411 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
413 qc = ieee80211_get_qos_ctl(hdr);
414 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
415 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
416 goto drop_unlock_sta;
418 seq_number = mvmsta->tid_data[tid].seq_number;
419 seq_number &= IEEE80211_SCTL_SEQ;
420 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
421 hdr->seq_ctrl |= cpu_to_le16(seq_number);
423 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
426 /* Copy MAC header from skb into command buffer */
427 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(fc));
429 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
432 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
433 goto drop_unlock_sta;
434 txq_id = mvmsta->tid_data[tid].txq_id;
437 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
438 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
440 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
441 goto drop_unlock_sta;
443 if (is_data_qos && !ieee80211_has_morefrags(fc))
444 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
446 spin_unlock(&mvmsta->lock);
448 if (txq_id < mvm->first_agg_queue)
449 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
454 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
455 spin_unlock(&mvmsta->lock);
460 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
461 struct ieee80211_sta *sta, u8 tid)
463 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
464 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
465 struct ieee80211_vif *vif = mvmsta->vif;
467 lockdep_assert_held(&mvmsta->lock);
469 if ((tid_data->state == IWL_AGG_ON ||
470 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
471 iwl_mvm_tid_queued(tid_data) == 0) {
473 * Now that this aggregation queue is empty tell mac80211 so it
474 * knows we no longer have frames buffered for the station on
475 * this TID (for the TIM bitmap calculation.)
477 ieee80211_sta_set_buffered(sta, tid, false);
480 if (tid_data->ssn != tid_data->next_reclaimed)
483 switch (tid_data->state) {
484 case IWL_EMPTYING_HW_QUEUE_ADDBA:
485 IWL_DEBUG_TX_QUEUES(mvm,
486 "Can continue addBA flow ssn = next_recl = %d\n",
487 tid_data->next_reclaimed);
488 tid_data->state = IWL_AGG_STARTING;
489 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
492 case IWL_EMPTYING_HW_QUEUE_DELBA:
493 IWL_DEBUG_TX_QUEUES(mvm,
494 "Can continue DELBA flow ssn = next_recl = %d\n",
495 tid_data->next_reclaimed);
496 iwl_mvm_disable_txq(mvm, tid_data->txq_id);
497 tid_data->state = IWL_AGG_OFF;
499 * we can't hold the mutex - but since we are after a sequence
500 * point (call to iwl_mvm_disable_txq(), so we don't even need
503 mvm->queue_to_mac80211[tid_data->txq_id] =
504 IWL_INVALID_MAC80211_QUEUE;
505 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
513 #ifdef CONFIG_IWLWIFI_DEBUG
514 const char *iwl_mvm_get_tx_fail_reason(u32 status)
516 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
517 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
519 switch (status & TX_STATUS_MSK) {
520 case TX_STATUS_SUCCESS:
522 TX_STATUS_POSTPONE(DELAY);
523 TX_STATUS_POSTPONE(FEW_BYTES);
524 TX_STATUS_POSTPONE(BT_PRIO);
525 TX_STATUS_POSTPONE(QUIET_PERIOD);
526 TX_STATUS_POSTPONE(CALC_TTAK);
527 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
528 TX_STATUS_FAIL(SHORT_LIMIT);
529 TX_STATUS_FAIL(LONG_LIMIT);
530 TX_STATUS_FAIL(UNDERRUN);
531 TX_STATUS_FAIL(DRAIN_FLOW);
532 TX_STATUS_FAIL(RFKILL_FLUSH);
533 TX_STATUS_FAIL(LIFE_EXPIRE);
534 TX_STATUS_FAIL(DEST_PS);
535 TX_STATUS_FAIL(HOST_ABORTED);
536 TX_STATUS_FAIL(BT_RETRY);
537 TX_STATUS_FAIL(STA_INVALID);
538 TX_STATUS_FAIL(FRAG_DROPPED);
539 TX_STATUS_FAIL(TID_DISABLE);
540 TX_STATUS_FAIL(FIFO_FLUSHED);
541 TX_STATUS_FAIL(SMALL_CF_POLL);
542 TX_STATUS_FAIL(FW_DROP);
543 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
548 #undef TX_STATUS_FAIL
549 #undef TX_STATUS_POSTPONE
551 #endif /* CONFIG_IWLWIFI_DEBUG */
553 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
554 enum ieee80211_band band,
555 struct ieee80211_tx_rate *r)
557 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
558 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
559 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
560 case RATE_MCS_CHAN_WIDTH_20:
562 case RATE_MCS_CHAN_WIDTH_40:
563 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
565 case RATE_MCS_CHAN_WIDTH_80:
566 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
568 case RATE_MCS_CHAN_WIDTH_160:
569 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
572 if (rate_n_flags & RATE_MCS_SGI_MSK)
573 r->flags |= IEEE80211_TX_RC_SHORT_GI;
574 if (rate_n_flags & RATE_MCS_HT_MSK) {
575 r->flags |= IEEE80211_TX_RC_MCS;
576 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
577 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
578 ieee80211_rate_set_vht(
579 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
580 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
581 RATE_VHT_MCS_NSS_POS) + 1);
582 r->flags |= IEEE80211_TX_RC_VHT_MCS;
584 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
590 * translate ucode response to mac80211 tx status control values
592 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
593 struct ieee80211_tx_info *info)
595 struct ieee80211_tx_rate *r = &info->status.rates[0];
597 info->status.antenna =
598 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
599 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
602 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
603 struct iwl_rx_packet *pkt)
605 struct ieee80211_sta *sta;
606 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
607 int txq_id = SEQ_TO_QUEUE(sequence);
608 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
609 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
610 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
611 u32 status = le16_to_cpu(tx_resp->status.status);
612 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
613 struct iwl_mvm_sta *mvmsta;
614 struct sk_buff_head skbs;
616 u16 next_reclaimed, seq_ctl;
618 __skb_queue_head_init(&skbs);
620 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
622 /* we can free until ssn % q.n_bd not inclusive */
623 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
625 while (!skb_queue_empty(&skbs)) {
626 struct sk_buff *skb = __skb_dequeue(&skbs);
627 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
631 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
633 memset(&info->status, 0, sizeof(info->status));
635 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
637 /* inform mac80211 about what happened with the frame */
638 switch (status & TX_STATUS_MSK) {
639 case TX_STATUS_SUCCESS:
640 case TX_STATUS_DIRECT_DONE:
641 info->flags |= IEEE80211_TX_STAT_ACK;
643 case TX_STATUS_FAIL_DEST_PS:
644 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
650 info->status.rates[0].count = tx_resp->failure_frame + 1;
651 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
654 /* Single frame failure in an AMPDU queue => send BAR */
655 if (txq_id >= mvm->first_agg_queue &&
656 !(info->flags & IEEE80211_TX_STAT_ACK))
657 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
659 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
660 if (status != TX_STATUS_SUCCESS) {
661 struct ieee80211_hdr *hdr = (void *)skb->data;
662 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
665 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
666 info->status.status_driver_data[0] =
667 (void *)(uintptr_t)tx_resp->reduced_tpc;
669 ieee80211_tx_status(mvm->hw, skb);
672 if (txq_id >= mvm->first_agg_queue) {
673 /* If this is an aggregation queue, we use the ssn since:
674 * ssn = wifi seq_num % 256.
675 * The seq_ctl is the sequence control of the packet to which
676 * this Tx response relates. But if there is a hole in the
677 * bitmap of the BA we received, this Tx response may allow to
678 * reclaim the hole and all the subsequent packets that were
679 * already acked. In that case, seq_ctl != ssn, and the next
680 * packet to be reclaimed will be ssn and not seq_ctl. In that
681 * case, several packets will be reclaimed even if
684 * The ssn is the index (% 256) of the latest packet that has
685 * treated (acked / dropped) + 1.
687 next_reclaimed = ssn;
689 /* The next packet to be reclaimed is the one after this one */
690 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
693 IWL_DEBUG_TX_REPLY(mvm,
694 "TXQ %d status %s (0x%08x)\n",
695 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
697 IWL_DEBUG_TX_REPLY(mvm,
698 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
699 le32_to_cpu(tx_resp->initial_rate),
700 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
701 ssn, next_reclaimed, seq_ctl);
705 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
707 * sta can't be NULL otherwise it'd mean that the sta has been freed in
708 * the firmware while we still have packets for it in the Tx queues.
710 if (WARN_ON_ONCE(!sta))
714 mvmsta = iwl_mvm_sta_from_mac80211(sta);
716 if (tid != IWL_TID_NON_QOS) {
717 struct iwl_mvm_tid_data *tid_data =
718 &mvmsta->tid_data[tid];
720 spin_lock_bh(&mvmsta->lock);
721 tid_data->next_reclaimed = next_reclaimed;
722 IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n",
724 iwl_mvm_check_ratid_empty(mvm, sta, tid);
725 spin_unlock_bh(&mvmsta->lock);
728 if (mvmsta->next_status_eosp) {
729 mvmsta->next_status_eosp = false;
730 ieee80211_sta_eosp(sta);
737 * If the txq is not an AMPDU queue, there is no chance we freed
738 * several skbs. Check that out...
740 if (txq_id >= mvm->first_agg_queue)
743 /* We can't free more than one frame at once on a shared queue */
744 WARN_ON(skb_freed > 1);
746 /* If we have still frames for this STA nothing to do here */
747 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
750 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
753 * If there are no pending frames for this STA and
754 * the tx to this station is not disabled, notify
755 * mac80211 that this station can now wake up in its
757 * If mvmsta is not NULL, sta is valid.
760 spin_lock_bh(&mvmsta->lock);
762 if (!mvmsta->disable_tx)
763 ieee80211_sta_block_awake(mvm->hw, sta, false);
765 spin_unlock_bh(&mvmsta->lock);
768 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
770 * We are draining and this was the last packet - pre_rcu_remove
771 * has been called already. We might be after the
772 * synchronize_net already.
773 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
775 set_bit(sta_id, mvm->sta_drained);
776 schedule_work(&mvm->sta_drained_wk);
783 #ifdef CONFIG_IWLWIFI_DEBUG
784 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
785 static const char *iwl_get_agg_tx_status(u16 status)
787 switch (status & AGG_TX_STATE_STATUS_MSK) {
788 AGG_TX_STATE_(TRANSMITTED);
789 AGG_TX_STATE_(UNDERRUN);
790 AGG_TX_STATE_(BT_PRIO);
791 AGG_TX_STATE_(FEW_BYTES);
792 AGG_TX_STATE_(ABORT);
793 AGG_TX_STATE_(LAST_SENT_TTL);
794 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
795 AGG_TX_STATE_(LAST_SENT_BT_KILL);
796 AGG_TX_STATE_(SCD_QUERY);
797 AGG_TX_STATE_(TEST_BAD_CRC32);
798 AGG_TX_STATE_(RESPONSE);
799 AGG_TX_STATE_(DUMP_TX);
800 AGG_TX_STATE_(DELAY_TX);
806 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
807 struct iwl_rx_packet *pkt)
809 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
810 struct agg_tx_status *frame_status = &tx_resp->status;
813 for (i = 0; i < tx_resp->frame_count; i++) {
814 u16 fstatus = le16_to_cpu(frame_status[i].status);
816 IWL_DEBUG_TX_REPLY(mvm,
817 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
818 iwl_get_agg_tx_status(fstatus),
819 fstatus & AGG_TX_STATE_STATUS_MSK,
820 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
821 AGG_TX_STATE_TRY_CNT_POS,
822 le16_to_cpu(frame_status[i].sequence));
826 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
827 struct iwl_rx_packet *pkt)
829 #endif /* CONFIG_IWLWIFI_DEBUG */
831 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
832 struct iwl_rx_packet *pkt)
834 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
835 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
836 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
837 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
838 struct ieee80211_sta *sta;
840 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue))
843 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
846 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
850 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
852 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
853 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
854 mvmsta->tid_data[tid].rate_n_flags =
855 le32_to_cpu(tx_resp->initial_rate);
856 mvmsta->tid_data[tid].reduced_tpc = tx_resp->reduced_tpc;
862 int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
863 struct iwl_device_cmd *cmd)
865 struct iwl_rx_packet *pkt = rxb_addr(rxb);
866 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
868 if (tx_resp->frame_count == 1)
869 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
871 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
876 static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info,
877 struct iwl_mvm_ba_notif *ba_notif,
878 struct iwl_mvm_tid_data *tid_data)
880 info->flags |= IEEE80211_TX_STAT_AMPDU;
881 info->status.ampdu_ack_len = ba_notif->txed_2_done;
882 info->status.ampdu_len = ba_notif->txed;
883 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
885 info->status.status_driver_data[0] =
886 (void *)(uintptr_t)tid_data->reduced_tpc;
889 int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
890 struct iwl_device_cmd *cmd)
892 struct iwl_rx_packet *pkt = rxb_addr(rxb);
893 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
894 struct sk_buff_head reclaimed_skbs;
895 struct iwl_mvm_tid_data *tid_data;
896 struct ieee80211_sta *sta;
897 struct iwl_mvm_sta *mvmsta;
899 int sta_id, tid, freed;
900 /* "flow" corresponds to Tx queue */
901 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
902 /* "ssn" is start of block-ack Tx window, corresponds to index
903 * (in Tx queue's circular buffer) of first TFD/frame in window */
904 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
906 sta_id = ba_notif->sta_id;
911 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
913 /* Reclaiming frames for a station that has been deleted ? */
914 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
919 mvmsta = iwl_mvm_sta_from_mac80211(sta);
920 tid_data = &mvmsta->tid_data[tid];
922 if (WARN_ONCE(tid_data->txq_id != scd_flow, "Q %d, tid %d, flow %d",
923 tid_data->txq_id, tid, scd_flow)) {
928 spin_lock_bh(&mvmsta->lock);
930 __skb_queue_head_init(&reclaimed_skbs);
933 * Release all TFDs before the SSN, i.e. all TFDs in front of
934 * block-ack window (we assume that they've been successfully
935 * transmitted ... if not, it's too late anyway).
937 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
940 IWL_DEBUG_TX_REPLY(mvm,
941 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
942 (u8 *)&ba_notif->sta_addr_lo32,
944 IWL_DEBUG_TX_REPLY(mvm,
945 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
946 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
947 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
948 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
949 ba_notif->txed_2_done);
951 tid_data->next_reclaimed = ba_resp_scd_ssn;
953 iwl_mvm_check_ratid_empty(mvm, sta, tid);
957 skb_queue_walk(&reclaimed_skbs, skb) {
958 struct ieee80211_hdr *hdr = (void *)skb->data;
959 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
961 if (ieee80211_is_data_qos(hdr->frame_control))
966 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
968 memset(&info->status, 0, sizeof(info->status));
969 /* Packet was transmitted successfully, failures come as single
970 * frames because before failing a frame the firmware transmits
971 * it without aggregation at least once.
973 info->flags |= IEEE80211_TX_STAT_ACK;
975 /* this is the first skb we deliver in this batch */
976 /* put the rate scaling data there */
978 iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data);
981 spin_unlock_bh(&mvmsta->lock);
983 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
984 * possible (i.e. first MPDU in the aggregation wasn't acked)
985 * Still it's important to update RS about sent vs. acked.
987 if (skb_queue_empty(&reclaimed_skbs)) {
988 struct ieee80211_tx_info ba_info = {};
989 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
993 rcu_dereference(mvmsta->vif->chanctx_conf);
995 if (WARN_ON_ONCE(!chanctx_conf))
998 ba_info.band = chanctx_conf->def.chan->band;
999 iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data);
1001 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1002 iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info);
1008 while (!skb_queue_empty(&reclaimed_skbs)) {
1009 skb = __skb_dequeue(&reclaimed_skbs);
1010 ieee80211_tx_status(mvm->hw, skb);
1016 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync)
1019 struct iwl_tx_path_flush_cmd flush_cmd = {
1020 .queues_ctl = cpu_to_le32(tfd_msk),
1021 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1024 u32 flags = sync ? 0 : CMD_ASYNC;
1026 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1027 sizeof(flush_cmd), &flush_cmd);
1029 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);