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.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * The full GNU General Public License is included in this distribution
25 * in the file called COPYING.
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
33 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
34 * All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
40 * * Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * * Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
46 * * Neither the name Intel Corporation nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 *****************************************************************************/
63 #include <linux/ieee80211.h>
64 #include <linux/etherdevice.h>
66 #include "iwl-trans.h"
67 #include "iwl-eeprom-parse.h"
72 * Sets most of the Tx cmd's fields
74 static void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
75 struct iwl_tx_cmd *tx_cmd,
76 struct ieee80211_tx_info *info, u8 sta_id)
78 struct ieee80211_hdr *hdr = (void *)skb->data;
79 __le16 fc = hdr->frame_control;
80 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
81 u32 len = skb->len + FCS_LEN;
84 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
85 tx_flags |= TX_CMD_FLG_ACK;
87 tx_flags &= ~TX_CMD_FLG_ACK;
89 if (ieee80211_is_probe_resp(fc))
90 tx_flags |= TX_CMD_FLG_TSF;
91 else if (ieee80211_is_back_req(fc))
92 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
94 if (ieee80211_has_morefrags(fc))
95 tx_flags |= TX_CMD_FLG_MORE_FRAG;
97 if (ieee80211_is_data_qos(fc)) {
98 u8 *qc = ieee80211_get_qos_ctl(hdr);
99 tx_cmd->tid_tspec = qc[0] & 0xf;
100 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
102 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
103 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
104 tx_flags |= TX_CMD_FLG_SEQ_CTL;
106 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
109 /* tid_tspec will default to 0 = BE when QOS isn't enabled */
110 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
111 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
112 TX_CMD_FLG_BT_PRIO_POS;
114 if (ieee80211_is_mgmt(fc)) {
115 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
116 tx_cmd->pm_frame_timeout = cpu_to_le16(3);
118 tx_cmd->pm_frame_timeout = cpu_to_le16(2);
120 /* The spec allows Action frames in A-MPDU, we don't support
123 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
124 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
125 tx_cmd->pm_frame_timeout = cpu_to_le16(2);
127 tx_cmd->pm_frame_timeout = 0;
130 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
131 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
132 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
134 tx_cmd->driver_txop = 0;
135 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
136 /* Total # bytes to be transmitted */
137 tx_cmd->len = cpu_to_le16((u16)skb->len);
138 tx_cmd->next_frame_len = 0;
139 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
140 tx_cmd->sta_id = sta_id;
144 * Sets the fields in the Tx cmd that are rate related
146 static void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm,
147 struct iwl_tx_cmd *tx_cmd,
148 struct ieee80211_tx_info *info,
149 struct ieee80211_sta *sta,
156 /* Set retry limit on RTS packets */
157 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
159 /* Set retry limit on DATA packets and Probe Responses*/
160 if (ieee80211_is_probe_resp(fc)) {
161 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
162 tx_cmd->rts_retry_limit =
163 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
164 } else if (ieee80211_is_back_req(fc)) {
165 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
167 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
171 * for data packets, rate info comes from the table inside the fw. This
172 * table is controlled by LINK_QUALITY commands
175 if (ieee80211_is_data(fc) && sta) {
176 tx_cmd->initial_rate_index = 0;
177 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
179 } else if (ieee80211_is_back_req(fc)) {
181 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
184 /* HT rate doesn't make sense for a non data frame */
185 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
186 "Got an HT rate for a non data frame 0x%x\n",
187 info->control.rates[0].flags);
189 rate_idx = info->control.rates[0].idx;
190 /* if the rate isn't a well known legacy rate, take the lowest one */
191 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
192 rate_idx = rate_lowest_index(
193 &mvm->nvm_data->bands[info->band], sta);
195 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
196 if (info->band == IEEE80211_BAND_5GHZ)
197 rate_idx += IWL_FIRST_OFDM_RATE;
199 /* For 2.4 GHZ band, check that there is no need to remap */
200 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
202 /* Get PLCP rate for tx_cmd->rate_n_flags */
203 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
205 mvm->mgmt_last_antenna_idx =
206 iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant,
207 mvm->mgmt_last_antenna_idx);
209 if (info->band == IEEE80211_BAND_2GHZ &&
210 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
211 rate_flags = BIT(ANT_A) << RATE_MCS_ANT_POS;
214 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
216 /* Set CCK flag as needed */
217 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
218 rate_flags |= RATE_MCS_CCK_MSK;
220 /* Set the rate in the TX cmd */
221 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
225 * Sets the fields in the Tx cmd that are crypto related
227 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
228 struct ieee80211_tx_info *info,
229 struct iwl_tx_cmd *tx_cmd,
230 struct sk_buff *skb_frag)
232 struct ieee80211_key_conf *keyconf = info->control.hw_key;
234 switch (keyconf->cipher) {
235 case WLAN_CIPHER_SUITE_CCMP:
236 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
237 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
238 if (info->flags & IEEE80211_TX_CTL_AMPDU)
239 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_CCMP_AGG);
242 case WLAN_CIPHER_SUITE_TKIP:
243 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
244 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
247 case WLAN_CIPHER_SUITE_WEP104:
248 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
250 case WLAN_CIPHER_SUITE_WEP40:
251 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
252 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
253 TX_CMD_SEC_WEP_KEY_IDX_MSK);
255 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
258 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
263 * Allocates and sets the Tx cmd the driver data pointers in the skb
265 static struct iwl_device_cmd *
266 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
267 struct ieee80211_sta *sta, u8 sta_id)
269 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
270 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
271 struct iwl_device_cmd *dev_cmd;
272 struct iwl_tx_cmd *tx_cmd;
274 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
276 if (unlikely(!dev_cmd))
279 memset(dev_cmd, 0, sizeof(*dev_cmd));
280 dev_cmd->hdr.cmd = TX_CMD;
281 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
283 if (info->control.hw_key)
284 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb);
286 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
288 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
290 memset(&info->status, 0, sizeof(info->status));
292 info->driver_data[0] = NULL;
293 info->driver_data[1] = dev_cmd;
298 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
300 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
301 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
302 struct iwl_device_cmd *dev_cmd;
303 struct iwl_tx_cmd *tx_cmd;
306 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU))
309 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
310 (!info->control.vif ||
311 info->hw_queue != info->control.vif->cab_queue)))
315 * If the interface on which frame is sent is the P2P_DEVICE
316 * or an AP/GO interface use the broadcast station associated
317 * with it; otherwise use the AUX station.
319 if (info->control.vif &&
320 (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
321 info->control.vif->type == NL80211_IFTYPE_AP)) {
322 struct iwl_mvm_vif *mvmvif =
323 iwl_mvm_vif_from_mac80211(info->control.vif);
324 sta_id = mvmvif->bcast_sta.sta_id;
326 sta_id = mvm->aux_sta.sta_id;
329 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue);
331 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, NULL, sta_id);
335 /* From now on, we cannot access info->control */
336 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
338 /* Copy MAC header from skb into command buffer */
339 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(hdr->frame_control));
341 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) {
342 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
350 * Sets the fields in the Tx cmd that are crypto related
352 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
353 struct ieee80211_sta *sta)
355 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
356 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
357 struct iwl_mvm_sta *mvmsta;
358 struct iwl_device_cmd *dev_cmd;
359 struct iwl_tx_cmd *tx_cmd;
362 u8 tid = IWL_MAX_TID_COUNT;
363 u8 txq_id = info->hw_queue;
364 bool is_data_qos = false, is_ampdu = false;
366 mvmsta = iwl_mvm_sta_from_mac80211(sta);
367 fc = hdr->frame_control;
369 if (WARN_ON_ONCE(!mvmsta))
372 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
375 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, sta, mvmsta->sta_id);
379 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
380 /* From now on, we cannot access info->control */
383 * we handle that entirely ourselves -- for uAPSD the firmware
384 * will always send a notification, and for PS-Poll responses
385 * we'll notify mac80211 when getting frame status
387 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
389 spin_lock(&mvmsta->lock);
391 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
393 qc = ieee80211_get_qos_ctl(hdr);
394 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
395 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
396 goto drop_unlock_sta;
398 seq_number = mvmsta->tid_data[tid].seq_number;
399 seq_number &= IEEE80211_SCTL_SEQ;
400 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
401 hdr->seq_ctrl |= cpu_to_le16(seq_number);
403 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
406 /* Copy MAC header from skb into command buffer */
407 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(fc));
409 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
412 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
413 goto drop_unlock_sta;
414 txq_id = mvmsta->tid_data[tid].txq_id;
417 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
418 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
420 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
421 goto drop_unlock_sta;
423 if (is_data_qos && !ieee80211_has_morefrags(fc))
424 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
426 spin_unlock(&mvmsta->lock);
428 if (txq_id < mvm->first_agg_queue)
429 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
434 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
435 spin_unlock(&mvmsta->lock);
440 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
441 struct ieee80211_sta *sta, u8 tid)
443 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
444 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
445 struct ieee80211_vif *vif = mvmsta->vif;
447 lockdep_assert_held(&mvmsta->lock);
449 if ((tid_data->state == IWL_AGG_ON ||
450 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
451 iwl_mvm_tid_queued(tid_data) == 0) {
453 * Now that this aggregation queue is empty tell mac80211 so it
454 * knows we no longer have frames buffered for the station on
455 * this TID (for the TIM bitmap calculation.)
457 ieee80211_sta_set_buffered(sta, tid, false);
460 if (tid_data->ssn != tid_data->next_reclaimed)
463 switch (tid_data->state) {
464 case IWL_EMPTYING_HW_QUEUE_ADDBA:
465 IWL_DEBUG_TX_QUEUES(mvm,
466 "Can continue addBA flow ssn = next_recl = %d\n",
467 tid_data->next_reclaimed);
468 tid_data->state = IWL_AGG_STARTING;
469 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
472 case IWL_EMPTYING_HW_QUEUE_DELBA:
473 IWL_DEBUG_TX_QUEUES(mvm,
474 "Can continue DELBA flow ssn = next_recl = %d\n",
475 tid_data->next_reclaimed);
476 iwl_trans_txq_disable(mvm->trans, tid_data->txq_id);
477 tid_data->state = IWL_AGG_OFF;
479 * we can't hold the mutex - but since we are after a sequence
480 * point (call to iwl_trans_txq_disable), so we don't even need
483 mvm->queue_to_mac80211[tid_data->txq_id] =
484 IWL_INVALID_MAC80211_QUEUE;
485 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
493 #ifdef CONFIG_IWLWIFI_DEBUG
494 const char *iwl_mvm_get_tx_fail_reason(u32 status)
496 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
497 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
499 switch (status & TX_STATUS_MSK) {
500 case TX_STATUS_SUCCESS:
502 TX_STATUS_POSTPONE(DELAY);
503 TX_STATUS_POSTPONE(FEW_BYTES);
504 TX_STATUS_POSTPONE(BT_PRIO);
505 TX_STATUS_POSTPONE(QUIET_PERIOD);
506 TX_STATUS_POSTPONE(CALC_TTAK);
507 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
508 TX_STATUS_FAIL(SHORT_LIMIT);
509 TX_STATUS_FAIL(LONG_LIMIT);
510 TX_STATUS_FAIL(UNDERRUN);
511 TX_STATUS_FAIL(DRAIN_FLOW);
512 TX_STATUS_FAIL(RFKILL_FLUSH);
513 TX_STATUS_FAIL(LIFE_EXPIRE);
514 TX_STATUS_FAIL(DEST_PS);
515 TX_STATUS_FAIL(HOST_ABORTED);
516 TX_STATUS_FAIL(BT_RETRY);
517 TX_STATUS_FAIL(STA_INVALID);
518 TX_STATUS_FAIL(FRAG_DROPPED);
519 TX_STATUS_FAIL(TID_DISABLE);
520 TX_STATUS_FAIL(FIFO_FLUSHED);
521 TX_STATUS_FAIL(SMALL_CF_POLL);
522 TX_STATUS_FAIL(FW_DROP);
523 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
528 #undef TX_STATUS_FAIL
529 #undef TX_STATUS_POSTPONE
531 #endif /* CONFIG_IWLWIFI_DEBUG */
533 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
534 enum ieee80211_band band,
535 struct ieee80211_tx_rate *r)
537 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
538 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
539 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
540 case RATE_MCS_CHAN_WIDTH_20:
542 case RATE_MCS_CHAN_WIDTH_40:
543 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
545 case RATE_MCS_CHAN_WIDTH_80:
546 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
548 case RATE_MCS_CHAN_WIDTH_160:
549 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
552 if (rate_n_flags & RATE_MCS_SGI_MSK)
553 r->flags |= IEEE80211_TX_RC_SHORT_GI;
554 if (rate_n_flags & RATE_MCS_HT_MSK) {
555 r->flags |= IEEE80211_TX_RC_MCS;
556 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
557 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
558 ieee80211_rate_set_vht(
559 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
560 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
561 RATE_VHT_MCS_NSS_POS) + 1);
562 r->flags |= IEEE80211_TX_RC_VHT_MCS;
564 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
570 * translate ucode response to mac80211 tx status control values
572 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
573 struct ieee80211_tx_info *info)
575 struct ieee80211_tx_rate *r = &info->status.rates[0];
577 info->status.antenna =
578 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
579 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
582 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
583 struct iwl_rx_packet *pkt)
585 struct ieee80211_sta *sta;
586 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
587 int txq_id = SEQ_TO_QUEUE(sequence);
588 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
589 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
590 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
591 u32 status = le16_to_cpu(tx_resp->status.status);
592 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
593 struct iwl_mvm_sta *mvmsta;
594 struct sk_buff_head skbs;
596 u16 next_reclaimed, seq_ctl;
598 __skb_queue_head_init(&skbs);
600 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
602 /* we can free until ssn % q.n_bd not inclusive */
603 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
605 while (!skb_queue_empty(&skbs)) {
606 struct sk_buff *skb = __skb_dequeue(&skbs);
607 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
611 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
613 memset(&info->status, 0, sizeof(info->status));
615 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
617 /* inform mac80211 about what happened with the frame */
618 switch (status & TX_STATUS_MSK) {
619 case TX_STATUS_SUCCESS:
620 case TX_STATUS_DIRECT_DONE:
621 info->flags |= IEEE80211_TX_STAT_ACK;
623 case TX_STATUS_FAIL_DEST_PS:
624 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
630 info->status.rates[0].count = tx_resp->failure_frame + 1;
631 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
634 /* Single frame failure in an AMPDU queue => send BAR */
635 if (txq_id >= mvm->first_agg_queue &&
636 !(info->flags & IEEE80211_TX_STAT_ACK))
637 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
639 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
640 if (status != TX_STATUS_SUCCESS) {
641 struct ieee80211_hdr *hdr = (void *)skb->data;
642 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
645 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
646 info->status.status_driver_data[0] =
647 (void *)(uintptr_t)tx_resp->reduced_tpc;
649 ieee80211_tx_status(mvm->hw, skb);
652 if (txq_id >= mvm->first_agg_queue) {
653 /* If this is an aggregation queue, we use the ssn since:
654 * ssn = wifi seq_num % 256.
655 * The seq_ctl is the sequence control of the packet to which
656 * this Tx response relates. But if there is a hole in the
657 * bitmap of the BA we received, this Tx response may allow to
658 * reclaim the hole and all the subsequent packets that were
659 * already acked. In that case, seq_ctl != ssn, and the next
660 * packet to be reclaimed will be ssn and not seq_ctl. In that
661 * case, several packets will be reclaimed even if
664 * The ssn is the index (% 256) of the latest packet that has
665 * treated (acked / dropped) + 1.
667 next_reclaimed = ssn;
669 /* The next packet to be reclaimed is the one after this one */
670 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
673 IWL_DEBUG_TX_REPLY(mvm,
674 "TXQ %d status %s (0x%08x)\n",
675 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
677 IWL_DEBUG_TX_REPLY(mvm,
678 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
679 le32_to_cpu(tx_resp->initial_rate),
680 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
681 ssn, next_reclaimed, seq_ctl);
685 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
687 * sta can't be NULL otherwise it'd mean that the sta has been freed in
688 * the firmware while we still have packets for it in the Tx queues.
690 if (WARN_ON_ONCE(!sta))
694 mvmsta = iwl_mvm_sta_from_mac80211(sta);
696 if (tid != IWL_TID_NON_QOS) {
697 struct iwl_mvm_tid_data *tid_data =
698 &mvmsta->tid_data[tid];
700 spin_lock_bh(&mvmsta->lock);
701 tid_data->next_reclaimed = next_reclaimed;
702 IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n",
704 iwl_mvm_check_ratid_empty(mvm, sta, tid);
705 spin_unlock_bh(&mvmsta->lock);
708 if (mvmsta->next_status_eosp) {
709 mvmsta->next_status_eosp = false;
710 ieee80211_sta_eosp(sta);
717 * If the txq is not an AMPDU queue, there is no chance we freed
718 * several skbs. Check that out...
720 if (txq_id >= mvm->first_agg_queue)
723 /* We can't free more than one frame at once on a shared queue */
724 WARN_ON(skb_freed > 1);
726 /* If we have still frames from this STA nothing to do here */
727 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
730 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
732 * If there are no pending frames for this STA, notify
733 * mac80211 that this station can go to sleep in its
735 * If mvmsta is not NULL, sta is valid.
737 ieee80211_sta_block_awake(mvm->hw, sta, false);
740 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
742 * We are draining and this was the last packet - pre_rcu_remove
743 * has been called already. We might be after the
744 * synchronize_net already.
745 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
747 set_bit(sta_id, mvm->sta_drained);
748 schedule_work(&mvm->sta_drained_wk);
755 #ifdef CONFIG_IWLWIFI_DEBUG
756 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
757 static const char *iwl_get_agg_tx_status(u16 status)
759 switch (status & AGG_TX_STATE_STATUS_MSK) {
760 AGG_TX_STATE_(TRANSMITTED);
761 AGG_TX_STATE_(UNDERRUN);
762 AGG_TX_STATE_(BT_PRIO);
763 AGG_TX_STATE_(FEW_BYTES);
764 AGG_TX_STATE_(ABORT);
765 AGG_TX_STATE_(LAST_SENT_TTL);
766 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
767 AGG_TX_STATE_(LAST_SENT_BT_KILL);
768 AGG_TX_STATE_(SCD_QUERY);
769 AGG_TX_STATE_(TEST_BAD_CRC32);
770 AGG_TX_STATE_(RESPONSE);
771 AGG_TX_STATE_(DUMP_TX);
772 AGG_TX_STATE_(DELAY_TX);
778 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
779 struct iwl_rx_packet *pkt)
781 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
782 struct agg_tx_status *frame_status = &tx_resp->status;
785 for (i = 0; i < tx_resp->frame_count; i++) {
786 u16 fstatus = le16_to_cpu(frame_status[i].status);
788 IWL_DEBUG_TX_REPLY(mvm,
789 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
790 iwl_get_agg_tx_status(fstatus),
791 fstatus & AGG_TX_STATE_STATUS_MSK,
792 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
793 AGG_TX_STATE_TRY_CNT_POS,
794 le16_to_cpu(frame_status[i].sequence));
798 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
799 struct iwl_rx_packet *pkt)
801 #endif /* CONFIG_IWLWIFI_DEBUG */
803 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
804 struct iwl_rx_packet *pkt)
806 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
807 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
808 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
809 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
810 struct ieee80211_sta *sta;
812 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue))
815 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
818 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
822 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
824 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
825 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
826 mvmsta->tid_data[tid].rate_n_flags =
827 le32_to_cpu(tx_resp->initial_rate);
828 mvmsta->tid_data[tid].reduced_tpc = tx_resp->reduced_tpc;
834 int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
835 struct iwl_device_cmd *cmd)
837 struct iwl_rx_packet *pkt = rxb_addr(rxb);
838 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
840 if (tx_resp->frame_count == 1)
841 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
843 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
848 int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
849 struct iwl_device_cmd *cmd)
851 struct iwl_rx_packet *pkt = rxb_addr(rxb);
852 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
853 struct sk_buff_head reclaimed_skbs;
854 struct iwl_mvm_tid_data *tid_data;
855 struct ieee80211_sta *sta;
856 struct iwl_mvm_sta *mvmsta;
858 int sta_id, tid, freed;
859 /* "flow" corresponds to Tx queue */
860 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
861 /* "ssn" is start of block-ack Tx window, corresponds to index
862 * (in Tx queue's circular buffer) of first TFD/frame in window */
863 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
865 sta_id = ba_notif->sta_id;
870 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
872 /* Reclaiming frames for a station that has been deleted ? */
873 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
878 mvmsta = iwl_mvm_sta_from_mac80211(sta);
879 tid_data = &mvmsta->tid_data[tid];
881 if (WARN_ONCE(tid_data->txq_id != scd_flow, "Q %d, tid %d, flow %d",
882 tid_data->txq_id, tid, scd_flow)) {
887 spin_lock_bh(&mvmsta->lock);
889 __skb_queue_head_init(&reclaimed_skbs);
892 * Release all TFDs before the SSN, i.e. all TFDs in front of
893 * block-ack window (we assume that they've been successfully
894 * transmitted ... if not, it's too late anyway).
896 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
899 IWL_DEBUG_TX_REPLY(mvm,
900 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
901 (u8 *)&ba_notif->sta_addr_lo32,
903 IWL_DEBUG_TX_REPLY(mvm,
904 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
905 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
906 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
907 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
908 ba_notif->txed_2_done);
910 tid_data->next_reclaimed = ba_resp_scd_ssn;
912 iwl_mvm_check_ratid_empty(mvm, sta, tid);
916 skb_queue_walk(&reclaimed_skbs, skb) {
917 struct ieee80211_hdr *hdr = (void *)skb->data;
918 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
920 if (ieee80211_is_data_qos(hdr->frame_control))
925 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
927 memset(&info->status, 0, sizeof(info->status));
928 /* Packet was transmitted successfully, failures come as single
929 * frames because before failing a frame the firmware transmits
930 * it without aggregation at least once.
932 info->flags |= IEEE80211_TX_STAT_ACK;
935 /* this is the first skb we deliver in this batch */
936 /* put the rate scaling data there */
937 info->flags |= IEEE80211_TX_STAT_AMPDU;
938 info->status.ampdu_ack_len = ba_notif->txed_2_done;
939 info->status.ampdu_len = ba_notif->txed;
940 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
942 info->status.status_driver_data[0] =
943 (void *)(uintptr_t)tid_data->reduced_tpc;
947 spin_unlock_bh(&mvmsta->lock);
951 while (!skb_queue_empty(&reclaimed_skbs)) {
952 skb = __skb_dequeue(&reclaimed_skbs);
953 ieee80211_tx_status(mvm->hw, skb);
959 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync)
962 struct iwl_tx_path_flush_cmd flush_cmd = {
963 .queues_ctl = cpu_to_le32(tfd_msk),
964 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
967 u32 flags = sync ? 0 : CMD_ASYNC;
969 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
970 sizeof(flush_cmd), &flush_cmd);
972 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);