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 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 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
112 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
113 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
115 ac = tid_to_mac80211_ac[0];
117 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
118 TX_CMD_FLG_BT_PRIO_POS;
120 if (ieee80211_is_mgmt(fc)) {
121 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
122 tx_cmd->pm_frame_timeout = cpu_to_le16(3);
124 tx_cmd->pm_frame_timeout = cpu_to_le16(2);
126 /* The spec allows Action frames in A-MPDU, we don't support
129 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
130 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
131 tx_cmd->pm_frame_timeout = cpu_to_le16(2);
133 tx_cmd->pm_frame_timeout = 0;
136 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
137 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
138 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
140 if ((mvm->fw->ucode_capa.capa[0] &
141 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
142 ieee80211_action_contains_tpc(skb))
143 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
145 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
146 /* Total # bytes to be transmitted */
147 tx_cmd->len = cpu_to_le16((u16)skb->len);
148 tx_cmd->next_frame_len = 0;
149 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
150 tx_cmd->sta_id = sta_id;
154 * Sets the fields in the Tx cmd that are rate related
156 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
157 struct ieee80211_tx_info *info,
158 struct ieee80211_sta *sta, __le16 fc)
164 /* Set retry limit on RTS packets */
165 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
167 /* Set retry limit on DATA packets and Probe Responses*/
168 if (ieee80211_is_probe_resp(fc)) {
169 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
170 tx_cmd->rts_retry_limit =
171 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
172 } else if (ieee80211_is_back_req(fc)) {
173 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
175 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
179 * for data packets, rate info comes from the table inside the fw. This
180 * table is controlled by LINK_QUALITY commands
183 if (ieee80211_is_data(fc) && sta) {
184 tx_cmd->initial_rate_index = 0;
185 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
187 } else if (ieee80211_is_back_req(fc)) {
189 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
192 /* HT rate doesn't make sense for a non data frame */
193 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
194 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n",
195 info->control.rates[0].flags,
196 info->control.rates[0].idx,
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 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 /* default to TID 0 for non-QoS packets */
433 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
435 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
439 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
440 goto drop_unlock_sta;
441 txq_id = mvmsta->tid_data[tid].txq_id;
444 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
445 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
447 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
448 goto drop_unlock_sta;
450 if (is_data_qos && !ieee80211_has_morefrags(fc))
451 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
453 spin_unlock(&mvmsta->lock);
455 if (txq_id < mvm->first_agg_queue)
456 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
461 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
462 spin_unlock(&mvmsta->lock);
467 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
468 struct ieee80211_sta *sta, u8 tid)
470 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
471 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
472 struct ieee80211_vif *vif = mvmsta->vif;
474 lockdep_assert_held(&mvmsta->lock);
476 if ((tid_data->state == IWL_AGG_ON ||
477 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
478 iwl_mvm_tid_queued(tid_data) == 0) {
480 * Now that this aggregation queue is empty tell mac80211 so it
481 * knows we no longer have frames buffered for the station on
482 * this TID (for the TIM bitmap calculation.)
484 ieee80211_sta_set_buffered(sta, tid, false);
487 if (tid_data->ssn != tid_data->next_reclaimed)
490 switch (tid_data->state) {
491 case IWL_EMPTYING_HW_QUEUE_ADDBA:
492 IWL_DEBUG_TX_QUEUES(mvm,
493 "Can continue addBA flow ssn = next_recl = %d\n",
494 tid_data->next_reclaimed);
495 tid_data->state = IWL_AGG_STARTING;
496 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
499 case IWL_EMPTYING_HW_QUEUE_DELBA:
500 IWL_DEBUG_TX_QUEUES(mvm,
501 "Can continue DELBA flow ssn = next_recl = %d\n",
502 tid_data->next_reclaimed);
503 iwl_mvm_disable_txq(mvm, tid_data->txq_id);
504 tid_data->state = IWL_AGG_OFF;
506 * we can't hold the mutex - but since we are after a sequence
507 * point (call to iwl_mvm_disable_txq(), so we don't even need
510 mvm->queue_to_mac80211[tid_data->txq_id] =
511 IWL_INVALID_MAC80211_QUEUE;
512 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
520 #ifdef CONFIG_IWLWIFI_DEBUG
521 const char *iwl_mvm_get_tx_fail_reason(u32 status)
523 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
524 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
526 switch (status & TX_STATUS_MSK) {
527 case TX_STATUS_SUCCESS:
529 TX_STATUS_POSTPONE(DELAY);
530 TX_STATUS_POSTPONE(FEW_BYTES);
531 TX_STATUS_POSTPONE(BT_PRIO);
532 TX_STATUS_POSTPONE(QUIET_PERIOD);
533 TX_STATUS_POSTPONE(CALC_TTAK);
534 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
535 TX_STATUS_FAIL(SHORT_LIMIT);
536 TX_STATUS_FAIL(LONG_LIMIT);
537 TX_STATUS_FAIL(UNDERRUN);
538 TX_STATUS_FAIL(DRAIN_FLOW);
539 TX_STATUS_FAIL(RFKILL_FLUSH);
540 TX_STATUS_FAIL(LIFE_EXPIRE);
541 TX_STATUS_FAIL(DEST_PS);
542 TX_STATUS_FAIL(HOST_ABORTED);
543 TX_STATUS_FAIL(BT_RETRY);
544 TX_STATUS_FAIL(STA_INVALID);
545 TX_STATUS_FAIL(FRAG_DROPPED);
546 TX_STATUS_FAIL(TID_DISABLE);
547 TX_STATUS_FAIL(FIFO_FLUSHED);
548 TX_STATUS_FAIL(SMALL_CF_POLL);
549 TX_STATUS_FAIL(FW_DROP);
550 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
555 #undef TX_STATUS_FAIL
556 #undef TX_STATUS_POSTPONE
558 #endif /* CONFIG_IWLWIFI_DEBUG */
560 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
561 enum ieee80211_band band,
562 struct ieee80211_tx_rate *r)
564 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
565 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
566 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
567 case RATE_MCS_CHAN_WIDTH_20:
569 case RATE_MCS_CHAN_WIDTH_40:
570 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
572 case RATE_MCS_CHAN_WIDTH_80:
573 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
575 case RATE_MCS_CHAN_WIDTH_160:
576 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
579 if (rate_n_flags & RATE_MCS_SGI_MSK)
580 r->flags |= IEEE80211_TX_RC_SHORT_GI;
581 if (rate_n_flags & RATE_MCS_HT_MSK) {
582 r->flags |= IEEE80211_TX_RC_MCS;
583 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
584 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
585 ieee80211_rate_set_vht(
586 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
587 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
588 RATE_VHT_MCS_NSS_POS) + 1);
589 r->flags |= IEEE80211_TX_RC_VHT_MCS;
591 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
597 * translate ucode response to mac80211 tx status control values
599 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
600 struct ieee80211_tx_info *info)
602 struct ieee80211_tx_rate *r = &info->status.rates[0];
604 info->status.antenna =
605 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
606 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
609 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
610 struct iwl_rx_packet *pkt)
612 struct ieee80211_sta *sta;
613 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
614 int txq_id = SEQ_TO_QUEUE(sequence);
615 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
616 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
617 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
618 u32 status = le16_to_cpu(tx_resp->status.status);
619 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
620 struct iwl_mvm_sta *mvmsta;
621 struct sk_buff_head skbs;
623 u16 next_reclaimed, seq_ctl;
625 __skb_queue_head_init(&skbs);
627 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
629 /* we can free until ssn % q.n_bd not inclusive */
630 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
632 while (!skb_queue_empty(&skbs)) {
633 struct sk_buff *skb = __skb_dequeue(&skbs);
634 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
638 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
640 memset(&info->status, 0, sizeof(info->status));
642 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
644 /* inform mac80211 about what happened with the frame */
645 switch (status & TX_STATUS_MSK) {
646 case TX_STATUS_SUCCESS:
647 case TX_STATUS_DIRECT_DONE:
648 info->flags |= IEEE80211_TX_STAT_ACK;
650 case TX_STATUS_FAIL_DEST_PS:
651 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
657 info->status.rates[0].count = tx_resp->failure_frame + 1;
658 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
661 /* Single frame failure in an AMPDU queue => send BAR */
662 if (txq_id >= mvm->first_agg_queue &&
663 !(info->flags & IEEE80211_TX_STAT_ACK))
664 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
666 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
667 if (status != TX_STATUS_SUCCESS) {
668 struct ieee80211_hdr *hdr = (void *)skb->data;
669 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
673 * TODO: this is not accurate if we are freeing more than one
676 info->status.tx_time =
677 le16_to_cpu(tx_resp->wireless_media_time);
678 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
679 info->status.status_driver_data[0] =
680 (void *)(uintptr_t)tx_resp->reduced_tpc;
682 ieee80211_tx_status(mvm->hw, skb);
685 if (txq_id >= mvm->first_agg_queue) {
686 /* If this is an aggregation queue, we use the ssn since:
687 * ssn = wifi seq_num % 256.
688 * The seq_ctl is the sequence control of the packet to which
689 * this Tx response relates. But if there is a hole in the
690 * bitmap of the BA we received, this Tx response may allow to
691 * reclaim the hole and all the subsequent packets that were
692 * already acked. In that case, seq_ctl != ssn, and the next
693 * packet to be reclaimed will be ssn and not seq_ctl. In that
694 * case, several packets will be reclaimed even if
697 * The ssn is the index (% 256) of the latest packet that has
698 * treated (acked / dropped) + 1.
700 next_reclaimed = ssn;
702 /* The next packet to be reclaimed is the one after this one */
703 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
706 IWL_DEBUG_TX_REPLY(mvm,
707 "TXQ %d status %s (0x%08x)\n",
708 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
710 IWL_DEBUG_TX_REPLY(mvm,
711 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
712 le32_to_cpu(tx_resp->initial_rate),
713 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
714 ssn, next_reclaimed, seq_ctl);
718 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
720 * sta can't be NULL otherwise it'd mean that the sta has been freed in
721 * the firmware while we still have packets for it in the Tx queues.
723 if (WARN_ON_ONCE(!sta))
727 mvmsta = iwl_mvm_sta_from_mac80211(sta);
729 if (tid != IWL_TID_NON_QOS) {
730 struct iwl_mvm_tid_data *tid_data =
731 &mvmsta->tid_data[tid];
733 spin_lock_bh(&mvmsta->lock);
734 tid_data->next_reclaimed = next_reclaimed;
735 IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n",
737 iwl_mvm_check_ratid_empty(mvm, sta, tid);
738 spin_unlock_bh(&mvmsta->lock);
741 if (mvmsta->next_status_eosp) {
742 mvmsta->next_status_eosp = false;
743 ieee80211_sta_eosp(sta);
750 * If the txq is not an AMPDU queue, there is no chance we freed
751 * several skbs. Check that out...
753 if (txq_id >= mvm->first_agg_queue)
756 /* We can't free more than one frame at once on a shared queue */
757 WARN_ON(skb_freed > 1);
759 /* If we have still frames for this STA nothing to do here */
760 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
763 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
766 * If there are no pending frames for this STA and
767 * the tx to this station is not disabled, notify
768 * mac80211 that this station can now wake up in its
770 * If mvmsta is not NULL, sta is valid.
773 spin_lock_bh(&mvmsta->lock);
775 if (!mvmsta->disable_tx)
776 ieee80211_sta_block_awake(mvm->hw, sta, false);
778 spin_unlock_bh(&mvmsta->lock);
781 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
783 * We are draining and this was the last packet - pre_rcu_remove
784 * has been called already. We might be after the
785 * synchronize_net already.
786 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
788 set_bit(sta_id, mvm->sta_drained);
789 schedule_work(&mvm->sta_drained_wk);
796 #ifdef CONFIG_IWLWIFI_DEBUG
797 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
798 static const char *iwl_get_agg_tx_status(u16 status)
800 switch (status & AGG_TX_STATE_STATUS_MSK) {
801 AGG_TX_STATE_(TRANSMITTED);
802 AGG_TX_STATE_(UNDERRUN);
803 AGG_TX_STATE_(BT_PRIO);
804 AGG_TX_STATE_(FEW_BYTES);
805 AGG_TX_STATE_(ABORT);
806 AGG_TX_STATE_(LAST_SENT_TTL);
807 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
808 AGG_TX_STATE_(LAST_SENT_BT_KILL);
809 AGG_TX_STATE_(SCD_QUERY);
810 AGG_TX_STATE_(TEST_BAD_CRC32);
811 AGG_TX_STATE_(RESPONSE);
812 AGG_TX_STATE_(DUMP_TX);
813 AGG_TX_STATE_(DELAY_TX);
819 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
820 struct iwl_rx_packet *pkt)
822 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
823 struct agg_tx_status *frame_status = &tx_resp->status;
826 for (i = 0; i < tx_resp->frame_count; i++) {
827 u16 fstatus = le16_to_cpu(frame_status[i].status);
829 IWL_DEBUG_TX_REPLY(mvm,
830 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
831 iwl_get_agg_tx_status(fstatus),
832 fstatus & AGG_TX_STATE_STATUS_MSK,
833 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
834 AGG_TX_STATE_TRY_CNT_POS,
835 le16_to_cpu(frame_status[i].sequence));
839 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
840 struct iwl_rx_packet *pkt)
842 #endif /* CONFIG_IWLWIFI_DEBUG */
844 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
845 struct iwl_rx_packet *pkt)
847 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
848 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
849 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
850 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
851 struct ieee80211_sta *sta;
853 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue))
856 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
859 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
863 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
865 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
866 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
867 mvmsta->tid_data[tid].rate_n_flags =
868 le32_to_cpu(tx_resp->initial_rate);
869 mvmsta->tid_data[tid].reduced_tpc = tx_resp->reduced_tpc;
870 mvmsta->tid_data[tid].tx_time =
871 le16_to_cpu(tx_resp->wireless_media_time);
877 int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
878 struct iwl_device_cmd *cmd)
880 struct iwl_rx_packet *pkt = rxb_addr(rxb);
881 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
883 if (tx_resp->frame_count == 1)
884 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
886 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
891 static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info,
892 struct iwl_mvm_ba_notif *ba_notif,
893 struct iwl_mvm_tid_data *tid_data)
895 info->flags |= IEEE80211_TX_STAT_AMPDU;
896 info->status.ampdu_ack_len = ba_notif->txed_2_done;
897 info->status.ampdu_len = ba_notif->txed;
898 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
900 /* TODO: not accounted if the whole A-MPDU failed */
901 info->status.tx_time = tid_data->tx_time;
902 info->status.status_driver_data[0] =
903 (void *)(uintptr_t)tid_data->reduced_tpc;
906 int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
907 struct iwl_device_cmd *cmd)
909 struct iwl_rx_packet *pkt = rxb_addr(rxb);
910 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
911 struct sk_buff_head reclaimed_skbs;
912 struct iwl_mvm_tid_data *tid_data;
913 struct ieee80211_sta *sta;
914 struct iwl_mvm_sta *mvmsta;
916 int sta_id, tid, freed;
917 /* "flow" corresponds to Tx queue */
918 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
919 /* "ssn" is start of block-ack Tx window, corresponds to index
920 * (in Tx queue's circular buffer) of first TFD/frame in window */
921 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
923 sta_id = ba_notif->sta_id;
928 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
930 /* Reclaiming frames for a station that has been deleted ? */
931 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
936 mvmsta = iwl_mvm_sta_from_mac80211(sta);
937 tid_data = &mvmsta->tid_data[tid];
939 if (WARN_ONCE(tid_data->txq_id != scd_flow, "Q %d, tid %d, flow %d",
940 tid_data->txq_id, tid, scd_flow)) {
945 spin_lock_bh(&mvmsta->lock);
947 __skb_queue_head_init(&reclaimed_skbs);
950 * Release all TFDs before the SSN, i.e. all TFDs in front of
951 * block-ack window (we assume that they've been successfully
952 * transmitted ... if not, it's too late anyway).
954 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
957 IWL_DEBUG_TX_REPLY(mvm,
958 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
959 (u8 *)&ba_notif->sta_addr_lo32,
961 IWL_DEBUG_TX_REPLY(mvm,
962 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
963 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
964 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
965 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
966 ba_notif->txed_2_done);
968 tid_data->next_reclaimed = ba_resp_scd_ssn;
970 iwl_mvm_check_ratid_empty(mvm, sta, tid);
974 skb_queue_walk(&reclaimed_skbs, skb) {
975 struct ieee80211_hdr *hdr = (void *)skb->data;
976 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
978 if (ieee80211_is_data_qos(hdr->frame_control))
983 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
985 memset(&info->status, 0, sizeof(info->status));
986 /* Packet was transmitted successfully, failures come as single
987 * frames because before failing a frame the firmware transmits
988 * it without aggregation at least once.
990 info->flags |= IEEE80211_TX_STAT_ACK;
992 /* this is the first skb we deliver in this batch */
993 /* put the rate scaling data there */
995 iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data);
998 spin_unlock_bh(&mvmsta->lock);
1000 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1001 * possible (i.e. first MPDU in the aggregation wasn't acked)
1002 * Still it's important to update RS about sent vs. acked.
1004 if (skb_queue_empty(&reclaimed_skbs)) {
1005 struct ieee80211_tx_info ba_info = {};
1006 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1010 rcu_dereference(mvmsta->vif->chanctx_conf);
1012 if (WARN_ON_ONCE(!chanctx_conf))
1015 ba_info.band = chanctx_conf->def.chan->band;
1016 iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data);
1018 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1019 iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info);
1025 while (!skb_queue_empty(&reclaimed_skbs)) {
1026 skb = __skb_dequeue(&reclaimed_skbs);
1027 ieee80211_tx_status(mvm->hw, skb);
1033 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync)
1036 struct iwl_tx_path_flush_cmd flush_cmd = {
1037 .queues_ctl = cpu_to_le32(tfd_msk),
1038 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1041 u32 flags = sync ? 0 : CMD_ASYNC;
1043 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1044 sizeof(flush_cmd), &flush_cmd);
1046 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);