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 - 2013 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 LICENSE.GPL.
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 - 2013 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;
83 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
84 tx_flags |= TX_CMD_FLG_ACK;
86 tx_flags &= ~TX_CMD_FLG_ACK;
88 if (ieee80211_is_probe_resp(fc))
89 tx_flags |= TX_CMD_FLG_TSF;
90 else if (ieee80211_is_back_req(fc))
91 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
93 /* High prio packet (wrt. BT coex) if it is EAPOL, MCAST or MGMT */
94 if (info->band == IEEE80211_BAND_2GHZ &&
95 (skb->protocol == cpu_to_be16(ETH_P_PAE) ||
96 is_multicast_ether_addr(hdr->addr1) ||
97 ieee80211_is_back_req(fc) ||
98 ieee80211_is_mgmt(fc)))
99 tx_flags |= TX_CMD_FLG_BT_DIS;
101 if (ieee80211_has_morefrags(fc))
102 tx_flags |= TX_CMD_FLG_MORE_FRAG;
104 if (ieee80211_is_data_qos(fc)) {
105 u8 *qc = ieee80211_get_qos_ctl(hdr);
106 tx_cmd->tid_tspec = qc[0] & 0xf;
107 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
109 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
110 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
111 tx_flags |= TX_CMD_FLG_SEQ_CTL;
113 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
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);
127 tx_cmd->pm_frame_timeout = 0;
130 if (info->flags & IEEE80211_TX_CTL_AMPDU)
131 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
133 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
134 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
135 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
137 tx_cmd->driver_txop = 0;
138 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
139 /* Total # bytes to be transmitted */
140 tx_cmd->len = cpu_to_le16((u16)skb->len);
141 tx_cmd->next_frame_len = 0;
142 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
143 tx_cmd->sta_id = sta_id;
147 * Sets the fields in the Tx cmd that are rate related
149 static void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm,
150 struct iwl_tx_cmd *tx_cmd,
151 struct ieee80211_tx_info *info,
152 struct ieee80211_sta *sta,
159 /* Set retry limit on RTS packets */
160 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
162 /* Set retry limit on DATA packets and Probe Responses*/
163 if (ieee80211_is_probe_resp(fc)) {
164 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
165 tx_cmd->rts_retry_limit =
166 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
167 } else if (ieee80211_is_back_req(fc)) {
168 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
170 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
174 * for data packets, rate info comes from the table inside he fw. This
175 * table is controlled by LINK_QUALITY commands
178 if (ieee80211_is_data(fc)) {
179 tx_cmd->initial_rate_index = 0;
180 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
182 } else if (ieee80211_is_back_req(fc)) {
183 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
186 /* HT rate doesn't make sense for a non data frame */
187 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
188 "Got an HT rate for a non data frame 0x%x\n",
189 info->control.rates[0].flags);
191 rate_idx = info->control.rates[0].idx;
192 /* if the rate isn't a well known legacy rate, take the lowest one */
193 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
194 rate_idx = rate_lowest_index(
195 &mvm->nvm_data->bands[info->band], sta);
197 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
198 if (info->band == IEEE80211_BAND_5GHZ)
199 rate_idx += IWL_FIRST_OFDM_RATE;
201 /* For 2.4 GHZ band, check that there is no need to remap */
202 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
204 /* Get PLCP rate for tx_cmd->rate_n_flags */
205 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
207 mvm->mgmt_last_antenna_idx =
208 iwl_mvm_next_antenna(mvm, mvm->nvm_data->valid_tx_ant,
209 mvm->mgmt_last_antenna_idx);
210 rate_flags = BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
212 /* Set CCK flag as needed */
213 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
214 rate_flags |= RATE_MCS_CCK_MSK;
216 /* Set the rate in the TX cmd */
217 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
221 * Sets the fields in the Tx cmd that are crypto related
223 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
224 struct ieee80211_tx_info *info,
225 struct iwl_tx_cmd *tx_cmd,
226 struct sk_buff *skb_frag)
228 struct ieee80211_key_conf *keyconf = info->control.hw_key;
230 switch (keyconf->cipher) {
231 case WLAN_CIPHER_SUITE_CCMP:
232 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
233 memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
234 if (info->flags & IEEE80211_TX_CTL_AMPDU)
235 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_CCMP_AGG);
238 case WLAN_CIPHER_SUITE_TKIP:
239 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
240 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
243 case WLAN_CIPHER_SUITE_WEP104:
244 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
246 case WLAN_CIPHER_SUITE_WEP40:
247 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
248 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
249 TX_CMD_SEC_WEP_KEY_IDX_MSK);
251 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
254 IWL_ERR(mvm, "Unknown encode cipher %x\n", keyconf->cipher);
260 * Allocates and sets the Tx cmd the driver data pointers in the skb
262 static struct iwl_device_cmd *
263 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
264 struct ieee80211_sta *sta, u8 sta_id)
266 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
267 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
268 struct iwl_device_cmd *dev_cmd;
269 struct iwl_tx_cmd *tx_cmd;
271 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
273 if (unlikely(!dev_cmd))
276 memset(dev_cmd, 0, sizeof(*dev_cmd));
277 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
279 if (info->control.hw_key)
280 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb);
282 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
284 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
286 memset(&info->status, 0, sizeof(info->status));
288 info->driver_data[0] = NULL;
289 info->driver_data[1] = dev_cmd;
294 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
296 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
297 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
298 struct iwl_device_cmd *dev_cmd;
299 struct iwl_tx_cmd *tx_cmd;
302 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU))
305 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
306 (!info->control.vif ||
307 info->hw_queue != info->control.vif->cab_queue)))
311 * If the interface on which frame is sent is the P2P_DEVICE
312 * or an AP/GO interface use the broadcast station associated
313 * with it; otherwise use the AUX station.
315 if (info->control.vif &&
316 (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
317 info->control.vif->type == NL80211_IFTYPE_AP)) {
318 struct iwl_mvm_vif *mvmvif =
319 iwl_mvm_vif_from_mac80211(info->control.vif);
320 sta_id = mvmvif->bcast_sta.sta_id;
322 sta_id = mvm->aux_sta.sta_id;
325 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue);
327 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, NULL, sta_id);
331 /* From now on, we cannot access info->control */
332 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
334 /* Copy MAC header from skb into command buffer */
335 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(hdr->frame_control));
337 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) {
338 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
346 * Sets the fields in the Tx cmd that are crypto related
348 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
349 struct ieee80211_sta *sta)
351 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
352 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
353 struct iwl_mvm_sta *mvmsta;
354 struct iwl_device_cmd *dev_cmd;
355 struct iwl_tx_cmd *tx_cmd;
358 u8 tid = IWL_MAX_TID_COUNT;
359 u8 txq_id = info->hw_queue;
360 bool is_data_qos = false, is_ampdu = false;
362 mvmsta = (void *)sta->drv_priv;
363 fc = hdr->frame_control;
365 if (WARN_ON_ONCE(!mvmsta))
368 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_INVALID_STATION))
371 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, sta, mvmsta->sta_id);
375 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
376 /* From now on, we cannot access info->control */
378 spin_lock(&mvmsta->lock);
380 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
382 qc = ieee80211_get_qos_ctl(hdr);
383 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
384 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
385 goto drop_unlock_sta;
387 seq_number = mvmsta->tid_data[tid].seq_number;
388 seq_number &= IEEE80211_SCTL_SEQ;
389 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
390 hdr->seq_ctrl |= cpu_to_le16(seq_number);
393 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
396 /* Copy MAC header from skb into command buffer */
397 memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(fc));
399 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
402 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
403 goto drop_unlock_sta;
404 txq_id = mvmsta->tid_data[tid].txq_id;
407 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
408 tid, txq_id, seq_number);
410 /* NOTE: aggregation will need changes here (for txq id) */
411 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
412 goto drop_unlock_sta;
414 if (is_data_qos && !ieee80211_has_morefrags(fc))
415 mvmsta->tid_data[tid].seq_number = seq_number;
417 spin_unlock(&mvmsta->lock);
419 if (mvmsta->vif->type == NL80211_IFTYPE_AP &&
420 txq_id < IWL_FIRST_AMPDU_QUEUE)
421 atomic_inc(&mvmsta->pending_frames);
426 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
427 spin_unlock(&mvmsta->lock);
432 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
433 struct ieee80211_sta *sta, u8 tid)
435 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
436 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
437 struct ieee80211_vif *vif = mvmsta->vif;
439 lockdep_assert_held(&mvmsta->lock);
441 if (tid_data->ssn != tid_data->next_reclaimed)
444 switch (tid_data->state) {
445 case IWL_EMPTYING_HW_QUEUE_ADDBA:
446 IWL_DEBUG_TX_QUEUES(mvm,
447 "Can continue addBA flow ssn = next_recl = %d\n",
448 tid_data->next_reclaimed);
449 tid_data->state = IWL_AGG_STARTING;
450 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
453 case IWL_EMPTYING_HW_QUEUE_DELBA:
454 IWL_DEBUG_TX_QUEUES(mvm,
455 "Can continue DELBA flow ssn = next_recl = %d\n",
456 tid_data->next_reclaimed);
457 iwl_trans_txq_disable(mvm->trans, tid_data->txq_id);
458 tid_data->state = IWL_AGG_OFF;
460 * we can't hold the mutex - but since we are after a sequence
461 * point (call to iwl_trans_txq_disable), so we don't even need
464 mvm->queue_to_mac80211[tid_data->txq_id] =
465 IWL_INVALID_MAC80211_QUEUE;
466 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
474 #ifdef CONFIG_IWLWIFI_DEBUG
475 const char *iwl_mvm_get_tx_fail_reason(u32 status)
477 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
478 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
480 switch (status & TX_STATUS_MSK) {
481 case TX_STATUS_SUCCESS:
483 TX_STATUS_POSTPONE(DELAY);
484 TX_STATUS_POSTPONE(FEW_BYTES);
485 TX_STATUS_POSTPONE(BT_PRIO);
486 TX_STATUS_POSTPONE(QUIET_PERIOD);
487 TX_STATUS_POSTPONE(CALC_TTAK);
488 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
489 TX_STATUS_FAIL(SHORT_LIMIT);
490 TX_STATUS_FAIL(LONG_LIMIT);
491 TX_STATUS_FAIL(UNDERRUN);
492 TX_STATUS_FAIL(DRAIN_FLOW);
493 TX_STATUS_FAIL(RFKILL_FLUSH);
494 TX_STATUS_FAIL(LIFE_EXPIRE);
495 TX_STATUS_FAIL(DEST_PS);
496 TX_STATUS_FAIL(HOST_ABORTED);
497 TX_STATUS_FAIL(BT_RETRY);
498 TX_STATUS_FAIL(STA_INVALID);
499 TX_STATUS_FAIL(FRAG_DROPPED);
500 TX_STATUS_FAIL(TID_DISABLE);
501 TX_STATUS_FAIL(FIFO_FLUSHED);
502 TX_STATUS_FAIL(SMALL_CF_POLL);
503 TX_STATUS_FAIL(FW_DROP);
504 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
509 #undef TX_STATUS_FAIL
510 #undef TX_STATUS_POSTPONE
512 #endif /* CONFIG_IWLWIFI_DEBUG */
515 * translate ucode response to mac80211 tx status control values
517 static void iwl_mvm_hwrate_to_tx_control(u32 rate_n_flags,
518 struct ieee80211_tx_info *info)
520 struct ieee80211_tx_rate *r = &info->status.rates[0];
522 info->status.antenna =
523 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
524 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
525 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
526 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
527 case RATE_MCS_CHAN_WIDTH_20:
529 case RATE_MCS_CHAN_WIDTH_40:
530 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
532 case RATE_MCS_CHAN_WIDTH_80:
533 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
535 case RATE_MCS_CHAN_WIDTH_160:
536 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
539 if (rate_n_flags & RATE_MCS_SGI_MSK)
540 r->flags |= IEEE80211_TX_RC_SHORT_GI;
541 if (rate_n_flags & RATE_MCS_HT_MSK) {
542 r->flags |= IEEE80211_TX_RC_MCS;
543 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
544 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
545 ieee80211_rate_set_vht(
546 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
547 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
548 RATE_VHT_MCS_NSS_POS) + 1);
549 r->flags |= IEEE80211_TX_RC_VHT_MCS;
551 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
556 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
557 struct iwl_rx_packet *pkt)
559 struct ieee80211_sta *sta;
560 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
561 int txq_id = SEQ_TO_QUEUE(sequence);
562 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
563 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
564 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
565 u32 status = le16_to_cpu(tx_resp->status.status);
566 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
567 struct iwl_mvm_sta *mvmsta;
568 struct sk_buff_head skbs;
570 u16 next_reclaimed, seq_ctl;
572 __skb_queue_head_init(&skbs);
574 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
576 /* we can free until ssn % q.n_bd not inclusive */
577 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
579 while (!skb_queue_empty(&skbs)) {
580 struct sk_buff *skb = __skb_dequeue(&skbs);
581 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
585 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
587 memset(&info->status, 0, sizeof(info->status));
589 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
591 /* inform mac80211 about what happened with the frame */
592 switch (status & TX_STATUS_MSK) {
593 case TX_STATUS_SUCCESS:
594 case TX_STATUS_DIRECT_DONE:
595 info->flags |= IEEE80211_TX_STAT_ACK;
597 case TX_STATUS_FAIL_DEST_PS:
598 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
604 info->status.rates[0].count = tx_resp->failure_frame + 1;
605 iwl_mvm_hwrate_to_tx_control(le32_to_cpu(tx_resp->initial_rate),
608 /* Single frame failure in an AMPDU queue => send BAR */
609 if (txq_id >= IWL_FIRST_AMPDU_QUEUE &&
610 !(info->flags & IEEE80211_TX_STAT_ACK))
611 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
613 /* W/A FW bug: seq_ctl is wrong when the queue is flushed */
614 if (status == TX_STATUS_FAIL_FIFO_FLUSHED) {
615 struct ieee80211_hdr *hdr = (void *)skb->data;
616 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
619 ieee80211_tx_status_ni(mvm->hw, skb);
622 if (txq_id >= IWL_FIRST_AMPDU_QUEUE) {
623 /* If this is an aggregation queue, we use the ssn since:
624 * ssn = wifi seq_num % 256.
625 * The seq_ctl is the sequence control of the packet to which
626 * this Tx response relates. But if there is a hole in the
627 * bitmap of the BA we received, this Tx response may allow to
628 * reclaim the hole and all the subsequent packets that were
629 * already acked. In that case, seq_ctl != ssn, and the next
630 * packet to be reclaimed will be ssn and not seq_ctl. In that
631 * case, several packets will be reclaimed even if
634 * The ssn is the index (% 256) of the latest packet that has
635 * treated (acked / dropped) + 1.
637 next_reclaimed = ssn;
639 /* The next packet to be reclaimed is the one after this one */
640 next_reclaimed = SEQ_TO_SN(seq_ctl + 0x10);
643 IWL_DEBUG_TX_REPLY(mvm,
644 "TXQ %d status %s (0x%08x)\n\t\t\t\tinitial_rate 0x%x "
645 "retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
646 txq_id, iwl_mvm_get_tx_fail_reason(status),
647 status, le32_to_cpu(tx_resp->initial_rate),
648 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
649 ssn, next_reclaimed, seq_ctl);
653 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
655 if (!IS_ERR_OR_NULL(sta)) {
656 mvmsta = (void *)sta->drv_priv;
658 if (tid != IWL_TID_NON_QOS) {
659 struct iwl_mvm_tid_data *tid_data =
660 &mvmsta->tid_data[tid];
662 spin_lock_bh(&mvmsta->lock);
663 tid_data->next_reclaimed = next_reclaimed;
664 IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n",
666 iwl_mvm_check_ratid_empty(mvm, sta, tid);
667 spin_unlock_bh(&mvmsta->lock);
670 #ifdef CONFIG_PM_SLEEP
671 mvmsta->last_seq_ctl = seq_ctl;
679 * If the txq is not an AMPDU queue, there is no chance we freed
680 * several skbs. Check that out...
681 * If there are no pending frames for this STA, notify mac80211 that
682 * this station can go to sleep in its STA table.
684 if (txq_id < IWL_FIRST_AMPDU_QUEUE && mvmsta &&
685 !WARN_ON(skb_freed > 1) &&
686 mvmsta->vif->type == NL80211_IFTYPE_AP &&
687 atomic_sub_and_test(skb_freed, &mvmsta->pending_frames)) {
688 ieee80211_sta_block_awake(mvm->hw, sta, false);
689 set_bit(sta_id, mvm->sta_drained);
690 schedule_work(&mvm->sta_drained_wk);
696 #ifdef CONFIG_IWLWIFI_DEBUG
697 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
698 static const char *iwl_get_agg_tx_status(u16 status)
700 switch (status & AGG_TX_STATE_STATUS_MSK) {
701 AGG_TX_STATE_(TRANSMITTED);
702 AGG_TX_STATE_(UNDERRUN);
703 AGG_TX_STATE_(BT_PRIO);
704 AGG_TX_STATE_(FEW_BYTES);
705 AGG_TX_STATE_(ABORT);
706 AGG_TX_STATE_(LAST_SENT_TTL);
707 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
708 AGG_TX_STATE_(LAST_SENT_BT_KILL);
709 AGG_TX_STATE_(SCD_QUERY);
710 AGG_TX_STATE_(TEST_BAD_CRC32);
711 AGG_TX_STATE_(RESPONSE);
712 AGG_TX_STATE_(DUMP_TX);
713 AGG_TX_STATE_(DELAY_TX);
719 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
720 struct iwl_rx_packet *pkt)
722 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
723 struct agg_tx_status *frame_status = &tx_resp->status;
726 for (i = 0; i < tx_resp->frame_count; i++) {
727 u16 fstatus = le16_to_cpu(frame_status[i].status);
729 IWL_DEBUG_TX_REPLY(mvm,
730 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
731 iwl_get_agg_tx_status(fstatus),
732 fstatus & AGG_TX_STATE_STATUS_MSK,
733 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
734 AGG_TX_STATE_TRY_CNT_POS,
735 le16_to_cpu(frame_status[i].sequence));
739 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
740 struct iwl_rx_packet *pkt)
742 #endif /* CONFIG_IWLWIFI_DEBUG */
744 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
745 struct iwl_rx_packet *pkt)
747 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
748 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
749 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
750 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
751 struct ieee80211_sta *sta;
753 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < IWL_FIRST_AMPDU_QUEUE))
756 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
759 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
763 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
765 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
766 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
767 mvmsta->tid_data[tid].rate_n_flags =
768 le32_to_cpu(tx_resp->initial_rate);
774 int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
775 struct iwl_device_cmd *cmd)
777 struct iwl_rx_packet *pkt = rxb_addr(rxb);
778 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
780 if (tx_resp->frame_count == 1)
781 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
783 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
788 int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
789 struct iwl_device_cmd *cmd)
791 struct iwl_rx_packet *pkt = rxb_addr(rxb);
792 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
793 struct sk_buff_head reclaimed_skbs;
794 struct iwl_mvm_tid_data *tid_data;
795 struct ieee80211_tx_info *info;
796 struct ieee80211_sta *sta;
797 struct iwl_mvm_sta *mvmsta;
798 struct ieee80211_hdr *hdr;
800 int sta_id, tid, freed;
802 /* "flow" corresponds to Tx queue */
803 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
805 /* "ssn" is start of block-ack Tx window, corresponds to index
806 * (in Tx queue's circular buffer) of first TFD/frame in window */
807 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
809 sta_id = ba_notif->sta_id;
814 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
816 /* Reclaiming frames for a station that has been deleted ? */
817 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
822 mvmsta = (void *)sta->drv_priv;
823 tid_data = &mvmsta->tid_data[tid];
825 if (WARN_ONCE(tid_data->txq_id != scd_flow, "Q %d, tid %d, flow %d",
826 tid_data->txq_id, tid, scd_flow)) {
831 spin_lock_bh(&mvmsta->lock);
833 __skb_queue_head_init(&reclaimed_skbs);
836 * Release all TFDs before the SSN, i.e. all TFDs in front of
837 * block-ack window (we assume that they've been successfully
838 * transmitted ... if not, it's too late anyway).
840 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
843 IWL_DEBUG_TX_REPLY(mvm,
844 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
845 (u8 *)&ba_notif->sta_addr_lo32,
847 IWL_DEBUG_TX_REPLY(mvm,
848 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
849 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
850 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
851 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
852 ba_notif->txed_2_done);
854 tid_data->next_reclaimed = ba_resp_scd_ssn;
856 iwl_mvm_check_ratid_empty(mvm, sta, tid);
860 skb_queue_walk(&reclaimed_skbs, skb) {
861 hdr = (struct ieee80211_hdr *)skb->data;
863 if (ieee80211_is_data_qos(hdr->frame_control))
868 info = IEEE80211_SKB_CB(skb);
869 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
872 /* this is the first skb we deliver in this batch */
873 /* put the rate scaling data there */
874 info = IEEE80211_SKB_CB(skb);
875 memset(&info->status, 0, sizeof(info->status));
876 info->flags |= IEEE80211_TX_STAT_ACK;
877 info->flags |= IEEE80211_TX_STAT_AMPDU;
878 info->status.ampdu_ack_len = ba_notif->txed_2_done;
879 info->status.ampdu_len = ba_notif->txed;
880 iwl_mvm_hwrate_to_tx_control(tid_data->rate_n_flags,
885 spin_unlock_bh(&mvmsta->lock);
889 while (!skb_queue_empty(&reclaimed_skbs)) {
890 skb = __skb_dequeue(&reclaimed_skbs);
891 ieee80211_tx_status_ni(mvm->hw, skb);
897 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync)
900 struct iwl_tx_path_flush_cmd flush_cmd = {
901 .queues_ctl = cpu_to_le32(tfd_msk),
902 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
905 u32 flags = sync ? CMD_SYNC : CMD_ASYNC;
907 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
908 sizeof(flush_cmd), &flush_cmd);
910 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);