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 - 2015 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 - 2015 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 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
77 struct iwl_fw_dbg_trigger_tlv *trig;
78 struct iwl_fw_dbg_trigger_ba *ba_trig;
80 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
83 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
84 ba_trig = (void *)trig->data;
86 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
89 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
92 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
93 "BAR sent to %pM, tid %d, ssn %d",
98 * Sets most of the Tx cmd's fields
100 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
101 struct iwl_tx_cmd *tx_cmd,
102 struct ieee80211_tx_info *info, u8 sta_id)
104 struct ieee80211_hdr *hdr = (void *)skb->data;
105 __le16 fc = hdr->frame_control;
106 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
107 u32 len = skb->len + FCS_LEN;
110 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
111 tx_flags |= TX_CMD_FLG_ACK;
113 tx_flags &= ~TX_CMD_FLG_ACK;
115 if (ieee80211_is_probe_resp(fc))
116 tx_flags |= TX_CMD_FLG_TSF;
118 if (ieee80211_has_morefrags(fc))
119 tx_flags |= TX_CMD_FLG_MORE_FRAG;
121 if (ieee80211_is_data_qos(fc)) {
122 u8 *qc = ieee80211_get_qos_ctl(hdr);
123 tx_cmd->tid_tspec = qc[0] & 0xf;
124 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
125 } else if (ieee80211_is_back_req(fc)) {
126 struct ieee80211_bar *bar = (void *)skb->data;
127 u16 control = le16_to_cpu(bar->control);
128 u16 ssn = le16_to_cpu(bar->start_seq_num);
130 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
131 tx_cmd->tid_tspec = (control &
132 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
133 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
134 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
135 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
138 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
139 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
140 tx_flags |= TX_CMD_FLG_SEQ_CTL;
142 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
145 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
146 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
147 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
149 ac = tid_to_mac80211_ac[0];
151 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
152 TX_CMD_FLG_BT_PRIO_POS;
154 if (ieee80211_is_mgmt(fc)) {
155 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
156 tx_cmd->pm_frame_timeout = cpu_to_le16(3);
158 tx_cmd->pm_frame_timeout = cpu_to_le16(2);
160 /* The spec allows Action frames in A-MPDU, we don't support
163 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
164 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
165 tx_cmd->pm_frame_timeout = cpu_to_le16(2);
167 tx_cmd->pm_frame_timeout = 0;
170 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
171 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
172 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
174 if (fw_has_capa(&mvm->fw->ucode_capa,
175 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
176 ieee80211_action_contains_tpc(skb))
177 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
179 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
180 /* Total # bytes to be transmitted */
181 tx_cmd->len = cpu_to_le16((u16)skb->len);
182 tx_cmd->next_frame_len = 0;
183 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
184 tx_cmd->sta_id = sta_id;
188 * Sets the fields in the Tx cmd that are rate related
190 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
191 struct ieee80211_tx_info *info,
192 struct ieee80211_sta *sta, __le16 fc)
198 /* Set retry limit on RTS packets */
199 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
201 /* Set retry limit on DATA packets and Probe Responses*/
202 if (ieee80211_is_probe_resp(fc)) {
203 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
204 tx_cmd->rts_retry_limit =
205 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
206 } else if (ieee80211_is_back_req(fc)) {
207 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
209 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
213 * for data packets, rate info comes from the table inside the fw. This
214 * table is controlled by LINK_QUALITY commands
217 if (ieee80211_is_data(fc) && sta) {
218 tx_cmd->initial_rate_index = 0;
219 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
221 } else if (ieee80211_is_back_req(fc)) {
223 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
226 /* HT rate doesn't make sense for a non data frame */
227 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
228 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n",
229 info->control.rates[0].flags,
230 info->control.rates[0].idx,
233 rate_idx = info->control.rates[0].idx;
234 /* if the rate isn't a well known legacy rate, take the lowest one */
235 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
236 rate_idx = rate_lowest_index(
237 &mvm->nvm_data->bands[info->band], sta);
239 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
240 if (info->band == IEEE80211_BAND_5GHZ)
241 rate_idx += IWL_FIRST_OFDM_RATE;
243 /* For 2.4 GHZ band, check that there is no need to remap */
244 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
246 /* Get PLCP rate for tx_cmd->rate_n_flags */
247 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
249 mvm->mgmt_last_antenna_idx =
250 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
251 mvm->mgmt_last_antenna_idx);
253 if (info->band == IEEE80211_BAND_2GHZ &&
254 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
255 rate_flags = BIT(mvm->cfg->non_shared_ant) << RATE_MCS_ANT_POS;
258 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
260 /* Set CCK flag as needed */
261 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
262 rate_flags |= RATE_MCS_CCK_MSK;
264 /* Set the rate in the TX cmd */
265 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
269 * Sets the fields in the Tx cmd that are crypto related
271 void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
272 struct ieee80211_tx_info *info,
273 struct iwl_tx_cmd *tx_cmd,
274 struct sk_buff *skb_frag)
276 struct ieee80211_key_conf *keyconf = info->control.hw_key;
278 switch (keyconf->cipher) {
279 case WLAN_CIPHER_SUITE_CCMP:
280 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
281 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
282 if (info->flags & IEEE80211_TX_CTL_AMPDU)
283 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_CCMP_AGG);
286 case WLAN_CIPHER_SUITE_TKIP:
287 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
288 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
291 case WLAN_CIPHER_SUITE_WEP104:
292 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
294 case WLAN_CIPHER_SUITE_WEP40:
295 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
296 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
297 TX_CMD_SEC_WEP_KEY_IDX_MSK);
299 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
302 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
307 * Allocates and sets the Tx cmd the driver data pointers in the skb
309 static struct iwl_device_cmd *
310 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
311 struct ieee80211_sta *sta, u8 sta_id)
313 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
314 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
315 struct iwl_device_cmd *dev_cmd;
316 struct iwl_tx_cmd *tx_cmd;
318 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
320 if (unlikely(!dev_cmd))
323 memset(dev_cmd, 0, sizeof(*dev_cmd));
324 dev_cmd->hdr.cmd = TX_CMD;
325 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
327 if (info->control.hw_key)
328 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb);
330 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
332 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
334 memset(&info->status, 0, sizeof(info->status));
336 info->driver_data[0] = NULL;
337 info->driver_data[1] = dev_cmd;
342 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
344 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
345 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
346 struct iwl_device_cmd *dev_cmd;
347 struct iwl_tx_cmd *tx_cmd;
350 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU))
353 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
354 (!info->control.vif ||
355 info->hw_queue != info->control.vif->cab_queue)))
359 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
360 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
361 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
362 * and hence needs to be sent on the aux queue
364 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
365 info->control.vif->type == NL80211_IFTYPE_STATION)
366 IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue;
369 * If the interface on which frame is sent is the P2P_DEVICE
370 * or an AP/GO interface use the broadcast station associated
371 * with it; otherwise use the AUX station.
373 if (info->control.vif &&
374 (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
375 info->control.vif->type == NL80211_IFTYPE_AP)) {
376 struct iwl_mvm_vif *mvmvif =
377 iwl_mvm_vif_from_mac80211(info->control.vif);
378 sta_id = mvmvif->bcast_sta.sta_id;
380 sta_id = mvm->aux_sta.sta_id;
383 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue);
385 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, NULL, sta_id);
389 /* From now on, we cannot access info->control */
390 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
392 /* Copy MAC header from skb into command buffer */
393 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(hdr->frame_control));
395 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) {
396 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
404 * Sets the fields in the Tx cmd that are crypto related
406 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
407 struct ieee80211_sta *sta)
409 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
410 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
411 struct iwl_mvm_sta *mvmsta;
412 struct iwl_device_cmd *dev_cmd;
413 struct iwl_tx_cmd *tx_cmd;
416 u8 tid = IWL_MAX_TID_COUNT;
417 u8 txq_id = info->hw_queue;
418 bool is_data_qos = false, is_ampdu = false;
420 mvmsta = iwl_mvm_sta_from_mac80211(sta);
421 fc = hdr->frame_control;
423 if (WARN_ON_ONCE(!mvmsta))
426 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
429 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, sta, mvmsta->sta_id);
433 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
434 /* From now on, we cannot access info->control */
437 * we handle that entirely ourselves -- for uAPSD the firmware
438 * will always send a notification, and for PS-Poll responses
439 * we'll notify mac80211 when getting frame status
441 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
443 spin_lock(&mvmsta->lock);
445 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
447 qc = ieee80211_get_qos_ctl(hdr);
448 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
449 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
450 goto drop_unlock_sta;
452 seq_number = mvmsta->tid_data[tid].seq_number;
453 seq_number &= IEEE80211_SCTL_SEQ;
454 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
455 hdr->seq_ctrl |= cpu_to_le16(seq_number);
457 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
460 /* Copy MAC header from skb into command buffer */
461 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(fc));
463 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
466 /* default to TID 0 for non-QoS packets */
467 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
469 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
473 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
474 goto drop_unlock_sta;
475 txq_id = mvmsta->tid_data[tid].txq_id;
478 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
479 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
481 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
482 goto drop_unlock_sta;
484 if (is_data_qos && !ieee80211_has_morefrags(fc))
485 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
487 spin_unlock(&mvmsta->lock);
489 if (txq_id < mvm->first_agg_queue)
490 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
495 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
496 spin_unlock(&mvmsta->lock);
501 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
502 struct ieee80211_sta *sta, u8 tid)
504 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
505 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
506 struct ieee80211_vif *vif = mvmsta->vif;
508 lockdep_assert_held(&mvmsta->lock);
510 if ((tid_data->state == IWL_AGG_ON ||
511 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
512 iwl_mvm_tid_queued(tid_data) == 0) {
514 * Now that this aggregation queue is empty tell mac80211 so it
515 * knows we no longer have frames buffered for the station on
516 * this TID (for the TIM bitmap calculation.)
518 ieee80211_sta_set_buffered(sta, tid, false);
521 if (tid_data->ssn != tid_data->next_reclaimed)
524 switch (tid_data->state) {
525 case IWL_EMPTYING_HW_QUEUE_ADDBA:
526 IWL_DEBUG_TX_QUEUES(mvm,
527 "Can continue addBA flow ssn = next_recl = %d\n",
528 tid_data->next_reclaimed);
529 tid_data->state = IWL_AGG_STARTING;
530 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
533 case IWL_EMPTYING_HW_QUEUE_DELBA:
534 IWL_DEBUG_TX_QUEUES(mvm,
535 "Can continue DELBA flow ssn = next_recl = %d\n",
536 tid_data->next_reclaimed);
537 iwl_mvm_disable_txq(mvm, tid_data->txq_id, CMD_ASYNC);
538 tid_data->state = IWL_AGG_OFF;
540 * we can't hold the mutex - but since we are after a sequence
541 * point (call to iwl_mvm_disable_txq(), so we don't even need
544 mvm->queue_to_mac80211[tid_data->txq_id] =
545 IWL_INVALID_MAC80211_QUEUE;
546 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
554 #ifdef CONFIG_IWLWIFI_DEBUG
555 const char *iwl_mvm_get_tx_fail_reason(u32 status)
557 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
558 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
560 switch (status & TX_STATUS_MSK) {
561 case TX_STATUS_SUCCESS:
563 TX_STATUS_POSTPONE(DELAY);
564 TX_STATUS_POSTPONE(FEW_BYTES);
565 TX_STATUS_POSTPONE(BT_PRIO);
566 TX_STATUS_POSTPONE(QUIET_PERIOD);
567 TX_STATUS_POSTPONE(CALC_TTAK);
568 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
569 TX_STATUS_FAIL(SHORT_LIMIT);
570 TX_STATUS_FAIL(LONG_LIMIT);
571 TX_STATUS_FAIL(UNDERRUN);
572 TX_STATUS_FAIL(DRAIN_FLOW);
573 TX_STATUS_FAIL(RFKILL_FLUSH);
574 TX_STATUS_FAIL(LIFE_EXPIRE);
575 TX_STATUS_FAIL(DEST_PS);
576 TX_STATUS_FAIL(HOST_ABORTED);
577 TX_STATUS_FAIL(BT_RETRY);
578 TX_STATUS_FAIL(STA_INVALID);
579 TX_STATUS_FAIL(FRAG_DROPPED);
580 TX_STATUS_FAIL(TID_DISABLE);
581 TX_STATUS_FAIL(FIFO_FLUSHED);
582 TX_STATUS_FAIL(SMALL_CF_POLL);
583 TX_STATUS_FAIL(FW_DROP);
584 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
589 #undef TX_STATUS_FAIL
590 #undef TX_STATUS_POSTPONE
592 #endif /* CONFIG_IWLWIFI_DEBUG */
594 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
595 enum ieee80211_band band,
596 struct ieee80211_tx_rate *r)
598 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
599 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
600 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
601 case RATE_MCS_CHAN_WIDTH_20:
603 case RATE_MCS_CHAN_WIDTH_40:
604 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
606 case RATE_MCS_CHAN_WIDTH_80:
607 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
609 case RATE_MCS_CHAN_WIDTH_160:
610 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
613 if (rate_n_flags & RATE_MCS_SGI_MSK)
614 r->flags |= IEEE80211_TX_RC_SHORT_GI;
615 if (rate_n_flags & RATE_MCS_HT_MSK) {
616 r->flags |= IEEE80211_TX_RC_MCS;
617 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
618 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
619 ieee80211_rate_set_vht(
620 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
621 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
622 RATE_VHT_MCS_NSS_POS) + 1);
623 r->flags |= IEEE80211_TX_RC_VHT_MCS;
625 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
631 * translate ucode response to mac80211 tx status control values
633 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
634 struct ieee80211_tx_info *info)
636 struct ieee80211_tx_rate *r = &info->status.rates[0];
638 info->status.antenna =
639 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
640 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
643 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
644 struct iwl_rx_packet *pkt)
646 struct ieee80211_sta *sta;
647 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
648 int txq_id = SEQ_TO_QUEUE(sequence);
649 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
650 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
651 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
652 u32 status = le16_to_cpu(tx_resp->status.status);
653 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
654 struct iwl_mvm_sta *mvmsta;
655 struct sk_buff_head skbs;
657 u16 next_reclaimed, seq_ctl;
659 __skb_queue_head_init(&skbs);
661 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
663 /* we can free until ssn % q.n_bd not inclusive */
664 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
666 while (!skb_queue_empty(&skbs)) {
667 struct sk_buff *skb = __skb_dequeue(&skbs);
668 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
672 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
674 memset(&info->status, 0, sizeof(info->status));
676 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
678 /* inform mac80211 about what happened with the frame */
679 switch (status & TX_STATUS_MSK) {
680 case TX_STATUS_SUCCESS:
681 case TX_STATUS_DIRECT_DONE:
682 info->flags |= IEEE80211_TX_STAT_ACK;
684 case TX_STATUS_FAIL_DEST_PS:
685 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
691 info->status.rates[0].count = tx_resp->failure_frame + 1;
692 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
694 info->status.status_driver_data[1] =
695 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
697 /* Single frame failure in an AMPDU queue => send BAR */
698 if (txq_id >= mvm->first_agg_queue &&
699 !(info->flags & IEEE80211_TX_STAT_ACK) &&
700 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
701 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
703 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
704 if (status != TX_STATUS_SUCCESS) {
705 struct ieee80211_hdr *hdr = (void *)skb->data;
706 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
710 * TODO: this is not accurate if we are freeing more than one
713 info->status.tx_time =
714 le16_to_cpu(tx_resp->wireless_media_time);
715 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
716 info->status.status_driver_data[0] =
717 (void *)(uintptr_t)tx_resp->reduced_tpc;
719 ieee80211_tx_status(mvm->hw, skb);
722 if (txq_id >= mvm->first_agg_queue) {
723 /* If this is an aggregation queue, we use the ssn since:
724 * ssn = wifi seq_num % 256.
725 * The seq_ctl is the sequence control of the packet to which
726 * this Tx response relates. But if there is a hole in the
727 * bitmap of the BA we received, this Tx response may allow to
728 * reclaim the hole and all the subsequent packets that were
729 * already acked. In that case, seq_ctl != ssn, and the next
730 * packet to be reclaimed will be ssn and not seq_ctl. In that
731 * case, several packets will be reclaimed even if
734 * The ssn is the index (% 256) of the latest packet that has
735 * treated (acked / dropped) + 1.
737 next_reclaimed = ssn;
739 /* The next packet to be reclaimed is the one after this one */
740 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
743 IWL_DEBUG_TX_REPLY(mvm,
744 "TXQ %d status %s (0x%08x)\n",
745 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
747 IWL_DEBUG_TX_REPLY(mvm,
748 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
749 le32_to_cpu(tx_resp->initial_rate),
750 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
751 ssn, next_reclaimed, seq_ctl);
755 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
757 * sta can't be NULL otherwise it'd mean that the sta has been freed in
758 * the firmware while we still have packets for it in the Tx queues.
760 if (WARN_ON_ONCE(!sta))
764 mvmsta = iwl_mvm_sta_from_mac80211(sta);
766 if (tid != IWL_TID_NON_QOS) {
767 struct iwl_mvm_tid_data *tid_data =
768 &mvmsta->tid_data[tid];
770 spin_lock_bh(&mvmsta->lock);
771 tid_data->next_reclaimed = next_reclaimed;
772 IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n",
774 iwl_mvm_check_ratid_empty(mvm, sta, tid);
775 spin_unlock_bh(&mvmsta->lock);
778 if (mvmsta->next_status_eosp) {
779 mvmsta->next_status_eosp = false;
780 ieee80211_sta_eosp(sta);
787 * If the txq is not an AMPDU queue, there is no chance we freed
788 * several skbs. Check that out...
790 if (txq_id >= mvm->first_agg_queue)
793 /* We can't free more than one frame at once on a shared queue */
794 WARN_ON(skb_freed > 1);
796 /* If we have still frames for this STA nothing to do here */
797 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
800 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
803 * If there are no pending frames for this STA and
804 * the tx to this station is not disabled, notify
805 * mac80211 that this station can now wake up in its
807 * If mvmsta is not NULL, sta is valid.
810 spin_lock_bh(&mvmsta->lock);
812 if (!mvmsta->disable_tx)
813 ieee80211_sta_block_awake(mvm->hw, sta, false);
815 spin_unlock_bh(&mvmsta->lock);
818 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
820 * We are draining and this was the last packet - pre_rcu_remove
821 * has been called already. We might be after the
822 * synchronize_net already.
823 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
825 set_bit(sta_id, mvm->sta_drained);
826 schedule_work(&mvm->sta_drained_wk);
833 #ifdef CONFIG_IWLWIFI_DEBUG
834 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
835 static const char *iwl_get_agg_tx_status(u16 status)
837 switch (status & AGG_TX_STATE_STATUS_MSK) {
838 AGG_TX_STATE_(TRANSMITTED);
839 AGG_TX_STATE_(UNDERRUN);
840 AGG_TX_STATE_(BT_PRIO);
841 AGG_TX_STATE_(FEW_BYTES);
842 AGG_TX_STATE_(ABORT);
843 AGG_TX_STATE_(LAST_SENT_TTL);
844 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
845 AGG_TX_STATE_(LAST_SENT_BT_KILL);
846 AGG_TX_STATE_(SCD_QUERY);
847 AGG_TX_STATE_(TEST_BAD_CRC32);
848 AGG_TX_STATE_(RESPONSE);
849 AGG_TX_STATE_(DUMP_TX);
850 AGG_TX_STATE_(DELAY_TX);
856 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
857 struct iwl_rx_packet *pkt)
859 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
860 struct agg_tx_status *frame_status = &tx_resp->status;
863 for (i = 0; i < tx_resp->frame_count; i++) {
864 u16 fstatus = le16_to_cpu(frame_status[i].status);
866 IWL_DEBUG_TX_REPLY(mvm,
867 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
868 iwl_get_agg_tx_status(fstatus),
869 fstatus & AGG_TX_STATE_STATUS_MSK,
870 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
871 AGG_TX_STATE_TRY_CNT_POS,
872 le16_to_cpu(frame_status[i].sequence));
876 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
877 struct iwl_rx_packet *pkt)
879 #endif /* CONFIG_IWLWIFI_DEBUG */
881 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
882 struct iwl_rx_packet *pkt)
884 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
885 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
886 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
887 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
888 struct ieee80211_sta *sta;
890 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue))
893 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
896 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
900 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
902 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
903 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
904 mvmsta->tid_data[tid].rate_n_flags =
905 le32_to_cpu(tx_resp->initial_rate);
906 mvmsta->tid_data[tid].reduced_tpc = tx_resp->reduced_tpc;
907 mvmsta->tid_data[tid].tx_time =
908 le16_to_cpu(tx_resp->wireless_media_time);
914 int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
915 struct iwl_device_cmd *cmd)
917 struct iwl_rx_packet *pkt = rxb_addr(rxb);
918 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
920 if (tx_resp->frame_count == 1)
921 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
923 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
928 static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info,
929 struct iwl_mvm_ba_notif *ba_notif,
930 struct iwl_mvm_tid_data *tid_data)
932 info->flags |= IEEE80211_TX_STAT_AMPDU;
933 info->status.ampdu_ack_len = ba_notif->txed_2_done;
934 info->status.ampdu_len = ba_notif->txed;
935 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
937 /* TODO: not accounted if the whole A-MPDU failed */
938 info->status.tx_time = tid_data->tx_time;
939 info->status.status_driver_data[0] =
940 (void *)(uintptr_t)tid_data->reduced_tpc;
941 info->status.status_driver_data[1] =
942 (void *)(uintptr_t)tid_data->rate_n_flags;
945 int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
946 struct iwl_device_cmd *cmd)
948 struct iwl_rx_packet *pkt = rxb_addr(rxb);
949 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
950 struct sk_buff_head reclaimed_skbs;
951 struct iwl_mvm_tid_data *tid_data;
952 struct ieee80211_sta *sta;
953 struct iwl_mvm_sta *mvmsta;
955 int sta_id, tid, freed;
956 /* "flow" corresponds to Tx queue */
957 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
958 /* "ssn" is start of block-ack Tx window, corresponds to index
959 * (in Tx queue's circular buffer) of first TFD/frame in window */
960 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
962 sta_id = ba_notif->sta_id;
965 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
966 tid >= IWL_MAX_TID_COUNT,
967 "sta_id %d tid %d", sta_id, tid))
972 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
974 /* Reclaiming frames for a station that has been deleted ? */
975 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
980 mvmsta = iwl_mvm_sta_from_mac80211(sta);
981 tid_data = &mvmsta->tid_data[tid];
983 if (tid_data->txq_id != scd_flow) {
985 "invalid BA notification: Q %d, tid %d, flow %d\n",
986 tid_data->txq_id, tid, scd_flow);
991 spin_lock_bh(&mvmsta->lock);
993 __skb_queue_head_init(&reclaimed_skbs);
996 * Release all TFDs before the SSN, i.e. all TFDs in front of
997 * block-ack window (we assume that they've been successfully
998 * transmitted ... if not, it's too late anyway).
1000 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
1003 IWL_DEBUG_TX_REPLY(mvm,
1004 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1005 (u8 *)&ba_notif->sta_addr_lo32,
1007 IWL_DEBUG_TX_REPLY(mvm,
1008 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1009 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1010 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
1011 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
1012 ba_notif->txed_2_done);
1014 tid_data->next_reclaimed = ba_resp_scd_ssn;
1016 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1020 skb_queue_walk(&reclaimed_skbs, skb) {
1021 struct ieee80211_hdr *hdr = (void *)skb->data;
1022 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1024 if (ieee80211_is_data_qos(hdr->frame_control))
1029 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1031 memset(&info->status, 0, sizeof(info->status));
1032 /* Packet was transmitted successfully, failures come as single
1033 * frames because before failing a frame the firmware transmits
1034 * it without aggregation at least once.
1036 info->flags |= IEEE80211_TX_STAT_ACK;
1038 /* this is the first skb we deliver in this batch */
1039 /* put the rate scaling data there */
1041 iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data);
1044 spin_unlock_bh(&mvmsta->lock);
1046 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1047 * possible (i.e. first MPDU in the aggregation wasn't acked)
1048 * Still it's important to update RS about sent vs. acked.
1050 if (skb_queue_empty(&reclaimed_skbs)) {
1051 struct ieee80211_tx_info ba_info = {};
1052 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1056 rcu_dereference(mvmsta->vif->chanctx_conf);
1058 if (WARN_ON_ONCE(!chanctx_conf))
1061 ba_info.band = chanctx_conf->def.chan->band;
1062 iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data);
1064 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1065 iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info);
1071 while (!skb_queue_empty(&reclaimed_skbs)) {
1072 skb = __skb_dequeue(&reclaimed_skbs);
1073 ieee80211_tx_status(mvm->hw, skb);
1080 * Note that there are transports that buffer frames before they reach
1081 * the firmware. This means that after flush_tx_path is called, the
1082 * queue might not be empty. The race-free way to handle this is to:
1083 * 1) set the station as draining
1084 * 2) flush the Tx path
1085 * 3) wait for the transport queues to be empty
1087 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync)
1090 struct iwl_tx_path_flush_cmd flush_cmd = {
1091 .queues_ctl = cpu_to_le32(tfd_msk),
1092 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1095 u32 flags = sync ? 0 : CMD_ASYNC;
1097 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1098 sizeof(flush_cmd), &flush_cmd);
1100 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);