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
10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
37 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
38 * All rights reserved.
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
44 * * Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * * Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in
48 * the documentation and/or other materials provided with the
50 * * Neither the name Intel Corporation nor the names of its
51 * contributors may be used to endorse or promote products derived
52 * from this software without specific prior written permission.
54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
66 *****************************************************************************/
67 #include <linux/ieee80211.h>
68 #include <linux/etherdevice.h>
69 #include <linux/tcp.h>
73 #include "iwl-trans.h"
74 #include "iwl-eeprom-parse.h"
80 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
83 struct iwl_fw_dbg_trigger_tlv *trig;
84 struct iwl_fw_dbg_trigger_ba *ba_trig;
86 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
89 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
90 ba_trig = (void *)trig->data;
92 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
95 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
98 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
99 "BAR sent to %pM, tid %d, ssn %d",
103 #define OPT_HDR(type, skb, off) \
104 (type *)(skb_network_header(skb) + (off))
106 static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
107 struct ieee80211_hdr *hdr,
108 struct ieee80211_tx_info *info)
110 u16 offload_assist = 0;
111 #if IS_ENABLED(CONFIG_INET)
112 u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
116 * Do not compute checksum if already computed or if transport will
119 if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD)
122 /* We do not expect to be requested to csum stuff we do not support */
123 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
124 (skb->protocol != htons(ETH_P_IP) &&
125 skb->protocol != htons(ETH_P_IPV6)),
126 "No support for requested checksum\n")) {
127 skb_checksum_help(skb);
131 if (skb->protocol == htons(ETH_P_IP)) {
132 protocol = ip_hdr(skb)->protocol;
134 #if IS_ENABLED(CONFIG_IPV6)
135 struct ipv6hdr *ipv6h =
136 (struct ipv6hdr *)skb_network_header(skb);
137 unsigned int off = sizeof(*ipv6h);
139 protocol = ipv6h->nexthdr;
140 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
141 struct ipv6_opt_hdr *hp;
143 /* only supported extension headers */
144 if (protocol != NEXTHDR_ROUTING &&
145 protocol != NEXTHDR_HOP &&
146 protocol != NEXTHDR_DEST) {
147 skb_checksum_help(skb);
151 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
152 protocol = hp->nexthdr;
153 off += ipv6_optlen(hp);
155 /* if we get here - protocol now should be TCP/UDP */
159 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
161 skb_checksum_help(skb);
166 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
169 * Set offset to IP header (snap).
170 * We don't support tunneling so no need to take care of inner header.
173 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
175 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
176 if (skb->protocol == htons(ETH_P_IP) &&
177 (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) {
178 ip_hdr(skb)->check = 0;
179 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
182 /* reset UDP/TCP header csum */
183 if (protocol == IPPROTO_TCP)
184 tcp_hdr(skb)->check = 0;
186 udp_hdr(skb)->check = 0;
188 /* mac header len should include IV, size is in words */
189 if (info->control.hw_key)
190 mh_len += info->control.hw_key->iv_len;
192 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
196 return offload_assist;
200 * Sets most of the Tx cmd's fields
202 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
203 struct iwl_tx_cmd *tx_cmd,
204 struct ieee80211_tx_info *info, u8 sta_id)
206 struct ieee80211_hdr *hdr = (void *)skb->data;
207 __le16 fc = hdr->frame_control;
208 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
209 u32 len = skb->len + FCS_LEN;
212 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
213 tx_flags |= TX_CMD_FLG_ACK;
215 tx_flags &= ~TX_CMD_FLG_ACK;
217 if (ieee80211_is_probe_resp(fc))
218 tx_flags |= TX_CMD_FLG_TSF;
220 if (ieee80211_has_morefrags(fc))
221 tx_flags |= TX_CMD_FLG_MORE_FRAG;
223 if (ieee80211_is_data_qos(fc)) {
224 u8 *qc = ieee80211_get_qos_ctl(hdr);
225 tx_cmd->tid_tspec = qc[0] & 0xf;
226 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
227 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
228 tx_cmd->offload_assist |=
229 cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU));
230 } else if (ieee80211_is_back_req(fc)) {
231 struct ieee80211_bar *bar = (void *)skb->data;
232 u16 control = le16_to_cpu(bar->control);
233 u16 ssn = le16_to_cpu(bar->start_seq_num);
235 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
236 tx_cmd->tid_tspec = (control &
237 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
238 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
239 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
240 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
243 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
244 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
245 tx_flags |= TX_CMD_FLG_SEQ_CTL;
247 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
250 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
251 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
252 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
254 ac = tid_to_mac80211_ac[0];
256 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
257 TX_CMD_FLG_BT_PRIO_POS;
259 if (ieee80211_is_mgmt(fc)) {
260 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
261 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
262 else if (ieee80211_is_action(fc))
263 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
265 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
267 /* The spec allows Action frames in A-MPDU, we don't support
270 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
271 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
272 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
274 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
277 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
278 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
279 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
281 if (fw_has_capa(&mvm->fw->ucode_capa,
282 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
283 ieee80211_action_contains_tpc(skb))
284 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
286 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
287 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
288 tx_cmd->len = cpu_to_le16((u16)skb->len);
289 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
290 tx_cmd->sta_id = sta_id;
292 /* padding is inserted later in transport */
293 if (ieee80211_hdrlen(fc) % 4 &&
294 !(tx_cmd->offload_assist & cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU))))
295 tx_cmd->offload_assist |= cpu_to_le16(BIT(TX_CMD_OFFLD_PAD));
297 tx_cmd->offload_assist |=
298 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info));
301 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
302 struct ieee80211_tx_info *info,
303 struct ieee80211_sta *sta)
309 /* HT rate doesn't make sense for a non data frame */
310 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
311 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n",
312 info->control.rates[0].flags,
313 info->control.rates[0].idx);
315 rate_idx = info->control.rates[0].idx;
316 /* if the rate isn't a well known legacy rate, take the lowest one */
317 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
318 rate_idx = rate_lowest_index(
319 &mvm->nvm_data->bands[info->band], sta);
321 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
322 if (info->band == NL80211_BAND_5GHZ)
323 rate_idx += IWL_FIRST_OFDM_RATE;
325 /* For 2.4 GHZ band, check that there is no need to remap */
326 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
328 /* Get PLCP rate for tx_cmd->rate_n_flags */
329 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
331 if (info->band == NL80211_BAND_2GHZ &&
332 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
333 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
336 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
338 /* Set CCK flag as needed */
339 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
340 rate_flags |= RATE_MCS_CCK_MSK;
342 return (u32)rate_plcp | rate_flags;
346 * Sets the fields in the Tx cmd that are rate related
348 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
349 struct ieee80211_tx_info *info,
350 struct ieee80211_sta *sta, __le16 fc)
352 /* Set retry limit on RTS packets */
353 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
355 /* Set retry limit on DATA packets and Probe Responses*/
356 if (ieee80211_is_probe_resp(fc)) {
357 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
358 tx_cmd->rts_retry_limit =
359 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
360 } else if (ieee80211_is_back_req(fc)) {
361 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
363 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
367 * for data packets, rate info comes from the table inside the fw. This
368 * table is controlled by LINK_QUALITY commands
371 if (ieee80211_is_data(fc) && sta) {
372 tx_cmd->initial_rate_index = 0;
373 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
375 } else if (ieee80211_is_back_req(fc)) {
377 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
380 mvm->mgmt_last_antenna_idx =
381 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
382 mvm->mgmt_last_antenna_idx);
384 /* Set the rate in the TX cmd */
385 tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta));
388 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
391 struct ieee80211_key_conf *keyconf = info->control.hw_key;
394 pn = atomic64_inc_return(&keyconf->tx_pn);
397 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
398 crypto_hdr[1] = pn >> 8;
399 crypto_hdr[4] = pn >> 16;
400 crypto_hdr[5] = pn >> 24;
401 crypto_hdr[6] = pn >> 32;
402 crypto_hdr[7] = pn >> 40;
406 * Sets the fields in the Tx cmd that are crypto related
408 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
409 struct ieee80211_tx_info *info,
410 struct iwl_tx_cmd *tx_cmd,
411 struct sk_buff *skb_frag,
414 struct ieee80211_key_conf *keyconf = info->control.hw_key;
415 u8 *crypto_hdr = skb_frag->data + hdrlen;
418 switch (keyconf->cipher) {
419 case WLAN_CIPHER_SUITE_CCMP:
420 case WLAN_CIPHER_SUITE_CCMP_256:
421 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
422 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
425 case WLAN_CIPHER_SUITE_TKIP:
426 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
427 pn = atomic64_inc_return(&keyconf->tx_pn);
428 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
429 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
432 case WLAN_CIPHER_SUITE_WEP104:
433 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
435 case WLAN_CIPHER_SUITE_WEP40:
436 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
437 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
438 TX_CMD_SEC_WEP_KEY_IDX_MSK);
440 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
442 case WLAN_CIPHER_SUITE_GCMP:
443 case WLAN_CIPHER_SUITE_GCMP_256:
444 /* TODO: Taking the key from the table might introduce a race
445 * when PTK rekeying is done, having an old packets with a PN
446 * based on the old key but the message encrypted with a new
448 * Need to handle this.
450 tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TX_CMD_SEC_KEY_FROM_TABLE;
451 tx_cmd->key[0] = keyconf->hw_key_idx;
452 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
455 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
460 * Allocates and sets the Tx cmd the driver data pointers in the skb
462 static struct iwl_device_cmd *
463 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
464 struct ieee80211_tx_info *info, int hdrlen,
465 struct ieee80211_sta *sta, u8 sta_id)
467 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
468 struct iwl_device_cmd *dev_cmd;
469 struct iwl_tx_cmd *tx_cmd;
471 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
473 if (unlikely(!dev_cmd))
476 memset(dev_cmd, 0, sizeof(*dev_cmd));
477 dev_cmd->hdr.cmd = TX_CMD;
479 if (iwl_mvm_has_new_tx_api(mvm)) {
480 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
481 u16 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info);
483 /* padding is inserted later in transport */
484 /* FIXME - check for AMSDU may need to be removed */
485 if (ieee80211_hdrlen(hdr->frame_control) % 4 &&
486 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
487 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
489 cmd->offload_assist |= cpu_to_le16(offload_assist);
491 /* Total # bytes to be transmitted */
492 cmd->len = cpu_to_le16((u16)skb->len);
494 /* Copy MAC header from skb into command buffer */
495 memcpy(cmd->hdr, hdr, hdrlen);
497 if (!info->control.hw_key)
498 cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_ENCRYPT_DIS);
500 /* For data packets rate info comes from the fw */
501 if (ieee80211_is_data(hdr->frame_control) && sta)
504 cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_CMD_RATE);
506 cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta));
511 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
513 if (info->control.hw_key)
514 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
516 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
518 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
520 /* Copy MAC header from skb into command buffer */
521 memcpy(tx_cmd->hdr, hdr, hdrlen);
527 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
528 struct iwl_device_cmd *cmd)
530 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
532 memset(&skb_info->status, 0, sizeof(skb_info->status));
533 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
535 skb_info->driver_data[1] = cmd;
538 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
539 struct ieee80211_tx_info *info, __le16 fc)
541 if (!iwl_mvm_is_dqa_supported(mvm))
542 return info->hw_queue;
544 switch (info->control.vif->type) {
545 case NL80211_IFTYPE_AP:
546 case NL80211_IFTYPE_ADHOC:
548 * Handle legacy hostapd as well, where station may be added
549 * only after assoc. Take care of the case where we send a
550 * deauth to a station that we don't have.
552 if (ieee80211_is_probe_resp(fc) || ieee80211_is_auth(fc) ||
553 ieee80211_is_deauth(fc))
554 return mvm->probe_queue;
555 if (info->hw_queue == info->control.vif->cab_queue)
556 return info->hw_queue;
558 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
559 "fc=0x%02x", le16_to_cpu(fc));
560 return mvm->probe_queue;
561 case NL80211_IFTYPE_P2P_DEVICE:
562 if (ieee80211_is_mgmt(fc))
563 return mvm->p2p_dev_queue;
564 if (info->hw_queue == info->control.vif->cab_queue)
565 return info->hw_queue;
568 return mvm->p2p_dev_queue;
570 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
575 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
577 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
578 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
579 struct ieee80211_tx_info info;
580 struct iwl_device_cmd *dev_cmd;
582 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
585 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
586 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
587 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
588 * and hence needs to be sent on the aux queue
590 if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
591 skb_info->control.vif->type == NL80211_IFTYPE_STATION)
592 skb_info->hw_queue = mvm->aux_queue;
594 memcpy(&info, skb->cb, sizeof(info));
596 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
599 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
600 (!info.control.vif ||
601 info.hw_queue != info.control.vif->cab_queue)))
604 queue = info.hw_queue;
607 * If the interface on which the frame is sent is the P2P_DEVICE
608 * or an AP/GO interface use the broadcast station associated
609 * with it; otherwise if the interface is a managed interface
610 * use the AP station associated with it for multicast traffic
611 * (this is not possible for unicast packets as a TLDS discovery
612 * response are sent without a station entry); otherwise use the
614 * In DQA mode, if vif is of type STATION and frames are not multicast
615 * or offchannel, they should be sent from the BSS queue.
616 * For example, TDLS setup frames should be sent on this queue,
617 * as they go through the AP.
619 sta_id = mvm->aux_sta.sta_id;
620 if (info.control.vif) {
621 struct iwl_mvm_vif *mvmvif =
622 iwl_mvm_vif_from_mac80211(info.control.vif);
624 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
625 info.control.vif->type == NL80211_IFTYPE_AP ||
626 info.control.vif->type == NL80211_IFTYPE_ADHOC) {
627 sta_id = mvmvif->bcast_sta.sta_id;
628 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info,
633 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
634 is_multicast_ether_addr(hdr->addr1)) {
635 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id);
637 if (ap_sta_id != IWL_MVM_INVALID_STA)
639 } else if (iwl_mvm_is_dqa_supported(mvm) &&
640 info.control.vif->type == NL80211_IFTYPE_STATION &&
641 queue != mvm->aux_queue) {
642 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
646 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
648 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
652 /* From now on, we cannot access info->control */
653 iwl_mvm_skb_prepare_status(skb, dev_cmd);
655 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
656 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
661 * Increase the pending frames counter, so that later when a reply comes
662 * in and the counter is decreased - we don't start getting negative
664 * Note that we don't need to make sure it isn't agg'd, since we're
666 * For DQA mode - we shouldn't increase it though
668 if (!iwl_mvm_is_dqa_supported(mvm))
669 atomic_inc(&mvm->pending_frames[sta_id]);
675 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
676 struct ieee80211_tx_info *info,
677 struct ieee80211_sta *sta,
678 struct sk_buff_head *mpdus_skb)
680 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
681 struct ieee80211_hdr *hdr = (void *)skb->data;
682 unsigned int mss = skb_shinfo(skb)->gso_size;
683 struct sk_buff *tmp, *next;
684 char cb[sizeof(skb->cb)];
685 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
686 bool ipv4 = (skb->protocol == htons(ETH_P_IP));
687 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
688 u16 snap_ip_tcp, pad, i = 0;
689 unsigned int dbg_max_amsdu_len;
690 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG;
693 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
696 qc = ieee80211_get_qos_ctl(hdr);
697 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
698 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
701 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len);
703 if (!sta->max_amsdu_len ||
704 !ieee80211_is_data_qos(hdr->frame_control) ||
705 (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) {
712 * Do not build AMSDU for IPv6 with extension headers.
713 * ask stack to segment and checkum the generated MPDUs for us.
715 if (skb->protocol == htons(ETH_P_IPV6) &&
716 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
720 netdev_features &= ~NETIF_F_CSUM_MASK;
725 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
726 * during an BA session.
728 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
729 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) {
735 max_amsdu_len = sta->max_amsdu_len;
737 /* the Tx FIFO to which this A-MSDU will be routed */
738 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
741 * Don't send an AMSDU that will be longer than the TXF.
742 * Add a security margin of 256 for the TX command + headers.
743 * We also want to have the start of the next packet inside the
744 * fifo to be able to send bursts.
746 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
747 mvm->smem_cfg.lmac[0].txfifo_size[txf] - 256);
749 if (unlikely(dbg_max_amsdu_len))
750 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
754 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
755 * supported. This is a spec requirement (IEEE 802.11-2015
756 * section 8.7.3 NOTE 3).
758 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
759 !sta->vht_cap.vht_supported)
760 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
762 /* Sub frame header + SNAP + IP header + TCP header + MSS */
763 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
764 pad = (4 - subf_len) & 0x3;
767 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
768 * N * subf_len + (N - 1) * pad.
770 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
771 if (num_subframes > 1)
772 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
774 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
775 tcp_hdrlen(skb) + skb->data_len;
778 * Make sure we have enough TBs for the A-MSDU:
779 * 2 for each subframe
780 * 1 more for each fragment
781 * 1 more for the potential data in the header
784 min_t(unsigned int, num_subframes,
785 (mvm->trans->max_skb_frags - 1 -
786 skb_shinfo(skb)->nr_frags) / 2);
788 /* This skb fits in one single A-MSDU */
789 if (num_subframes * mss >= tcp_payload_len) {
790 __skb_queue_tail(mpdus_skb, skb);
795 * Trick the segmentation function to make it
796 * create SKBs that can fit into one A-MSDU.
799 skb_shinfo(skb)->gso_size = num_subframes * mss;
800 memcpy(cb, skb->cb, sizeof(cb));
802 next = skb_gso_segment(skb, netdev_features);
803 skb_shinfo(skb)->gso_size = mss;
804 if (WARN_ON_ONCE(IS_ERR(next)))
813 memcpy(tmp->cb, cb, sizeof(tmp->cb));
815 * Compute the length of all the data added for the A-MSDU.
816 * This will be used to compute the length to write in the TX
817 * command. We have: SNAP + IP + TCP for n -1 subframes and
818 * ETH header for n subframes.
820 tcp_payload_len = skb_tail_pointer(tmp) -
821 skb_transport_header(tmp) -
822 tcp_hdrlen(tmp) + tmp->data_len;
825 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
827 if (tcp_payload_len > mss) {
828 skb_shinfo(tmp)->gso_size = mss;
830 qc = ieee80211_get_qos_ctl((void *)tmp->data);
833 ip_send_check(ip_hdr(tmp));
834 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
835 skb_shinfo(tmp)->gso_size = 0;
841 __skb_queue_tail(mpdus_skb, tmp);
847 #else /* CONFIG_INET */
848 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
849 struct ieee80211_tx_info *info,
850 struct ieee80211_sta *sta,
851 struct sk_buff_head *mpdus_skb)
853 /* Impossible to get TSO with CONFIG_INET */
860 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
861 struct iwl_mvm_sta *mvm_sta, u8 tid,
864 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
865 u8 mac_queue = info->hw_queue;
866 struct sk_buff_head *deferred_tx_frames;
868 lockdep_assert_held(&mvm_sta->lock);
870 mvm_sta->deferred_traffic_tid_map |= BIT(tid);
871 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);
873 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;
875 skb_queue_tail(deferred_tx_frames, skb);
878 * The first deferred frame should've stopped the MAC queues, so we
879 * should never get a second deferred frame for the RA/TID.
881 if (!WARN(skb_queue_len(deferred_tx_frames) != 1,
882 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid,
883 skb_queue_len(deferred_tx_frames))) {
884 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
885 schedule_work(&mvm->add_stream_wk);
889 /* Check if there are any timed-out TIDs on a given shared TXQ */
890 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
892 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
893 unsigned long now = jiffies;
896 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
899 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
900 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
901 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
909 * Sets the fields in the Tx cmd that are crypto related
911 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
912 struct ieee80211_tx_info *info,
913 struct ieee80211_sta *sta)
915 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
916 struct iwl_mvm_sta *mvmsta;
917 struct iwl_device_cmd *dev_cmd;
920 u8 tid = IWL_MAX_TID_COUNT;
921 u8 txq_id = info->hw_queue;
922 bool is_ampdu = false;
925 mvmsta = iwl_mvm_sta_from_mac80211(sta);
926 fc = hdr->frame_control;
927 hdrlen = ieee80211_hdrlen(fc);
929 if (WARN_ON_ONCE(!mvmsta))
932 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
935 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
936 sta, mvmsta->sta_id);
941 * we handle that entirely ourselves -- for uAPSD the firmware
942 * will always send a notification, and for PS-Poll responses
943 * we'll notify mac80211 when getting frame status
945 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
947 spin_lock(&mvmsta->lock);
949 /* nullfunc frames should go to the MGMT queue regardless of QOS,
950 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
951 * assignment of MGMT TID
953 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
955 qc = ieee80211_get_qos_ctl(hdr);
956 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
957 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
958 goto drop_unlock_sta;
960 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
961 if (WARN_ON_ONCE(is_ampdu &&
962 mvmsta->tid_data[tid].state != IWL_AGG_ON))
963 goto drop_unlock_sta;
965 seq_number = mvmsta->tid_data[tid].seq_number;
966 seq_number &= IEEE80211_SCTL_SEQ;
968 if (!iwl_mvm_has_new_tx_api(mvm)) {
969 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
971 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
972 hdr->seq_ctrl |= cpu_to_le16(seq_number);
973 /* update the tx_cmd hdr as it was already copied */
974 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
978 if (iwl_mvm_is_dqa_supported(mvm) || is_ampdu)
979 txq_id = mvmsta->tid_data[tid].txq_id;
981 if (sta->tdls && !iwl_mvm_is_dqa_supported(mvm)) {
982 /* default to TID 0 for non-QoS packets */
983 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
985 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
988 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
990 /* Check if TXQ needs to be allocated or re-activated */
991 if (unlikely(txq_id == IEEE80211_INVAL_HW_QUEUE ||
992 !mvmsta->tid_data[tid].is_tid_active) &&
993 iwl_mvm_is_dqa_supported(mvm)) {
994 /* If TXQ needs to be allocated... */
995 if (txq_id == IEEE80211_INVAL_HW_QUEUE) {
996 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);
999 * The frame is now deferred, and the worker scheduled
1000 * will re-allocate it, so we can free it for now.
1002 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1003 spin_unlock(&mvmsta->lock);
1007 /* If we are here - TXQ exists and needs to be re-activated */
1008 spin_lock(&mvm->queue_info_lock);
1009 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1010 mvmsta->tid_data[tid].is_tid_active = true;
1011 spin_unlock(&mvm->queue_info_lock);
1013 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n",
1017 if (iwl_mvm_is_dqa_supported(mvm)) {
1018 /* Keep track of the time of the last frame for this RA/TID */
1019 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1022 * If we have timed-out TIDs - schedule the worker that will
1023 * reconfig the queues and update them
1025 * Note that the mvm->queue_info_lock isn't being taken here in
1026 * order to not serialize the TX flow. This isn't dangerous
1027 * because scheduling mvm->add_stream_wk can't ruin the state,
1028 * and if we DON'T schedule it due to some race condition then
1029 * next TX we get here we will.
1031 if (unlikely(mvm->queue_info[txq_id].status ==
1032 IWL_MVM_QUEUE_SHARED &&
1033 iwl_mvm_txq_should_update(mvm, txq_id)))
1034 schedule_work(&mvm->add_stream_wk);
1037 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
1038 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
1040 /* From now on, we cannot access info->control */
1041 iwl_mvm_skb_prepare_status(skb, dev_cmd);
1043 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1044 goto drop_unlock_sta;
1046 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1047 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1049 spin_unlock(&mvmsta->lock);
1051 /* Increase pending frames count if this isn't AMPDU or DQA queue */
1052 if (!iwl_mvm_is_dqa_supported(mvm) && !is_ampdu)
1053 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
1058 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1059 spin_unlock(&mvmsta->lock);
1064 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
1065 struct ieee80211_sta *sta)
1067 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1068 struct ieee80211_tx_info info;
1069 struct sk_buff_head mpdus_skbs;
1070 unsigned int payload_len;
1073 if (WARN_ON_ONCE(!mvmsta))
1076 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1079 memcpy(&info, skb->cb, sizeof(info));
1081 if (!skb_is_gso(skb))
1082 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1084 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1085 tcp_hdrlen(skb) + skb->data_len;
1087 if (payload_len <= skb_shinfo(skb)->gso_size)
1088 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1090 __skb_queue_head_init(&mpdus_skbs);
1092 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1096 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1099 while (!skb_queue_empty(&mpdus_skbs)) {
1100 skb = __skb_dequeue(&mpdus_skbs);
1102 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1104 __skb_queue_purge(&mpdus_skbs);
1112 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1113 struct ieee80211_sta *sta, u8 tid)
1115 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1116 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1117 struct ieee80211_vif *vif = mvmsta->vif;
1119 lockdep_assert_held(&mvmsta->lock);
1121 if ((tid_data->state == IWL_AGG_ON ||
1122 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA ||
1123 iwl_mvm_is_dqa_supported(mvm)) &&
1124 iwl_mvm_tid_queued(tid_data) == 0) {
1126 * Now that this aggregation or DQA queue is empty tell
1127 * mac80211 so it knows we no longer have frames buffered for
1128 * the station on this TID (for the TIM bitmap calculation.)
1130 ieee80211_sta_set_buffered(sta, tid, false);
1133 if (tid_data->ssn != tid_data->next_reclaimed)
1136 switch (tid_data->state) {
1137 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1138 IWL_DEBUG_TX_QUEUES(mvm,
1139 "Can continue addBA flow ssn = next_recl = %d\n",
1140 tid_data->next_reclaimed);
1141 tid_data->state = IWL_AGG_STARTING;
1142 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1145 case IWL_EMPTYING_HW_QUEUE_DELBA:
1146 IWL_DEBUG_TX_QUEUES(mvm,
1147 "Can continue DELBA flow ssn = next_recl = %d\n",
1148 tid_data->next_reclaimed);
1149 if (!iwl_mvm_is_dqa_supported(mvm)) {
1150 u8 mac80211_ac = tid_to_mac80211_ac[tid];
1152 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
1153 vif->hw_queue[mac80211_ac], tid,
1156 tid_data->state = IWL_AGG_OFF;
1157 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1165 #ifdef CONFIG_IWLWIFI_DEBUG
1166 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1168 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1169 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1171 switch (status & TX_STATUS_MSK) {
1172 case TX_STATUS_SUCCESS:
1174 TX_STATUS_POSTPONE(DELAY);
1175 TX_STATUS_POSTPONE(FEW_BYTES);
1176 TX_STATUS_POSTPONE(BT_PRIO);
1177 TX_STATUS_POSTPONE(QUIET_PERIOD);
1178 TX_STATUS_POSTPONE(CALC_TTAK);
1179 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1180 TX_STATUS_FAIL(SHORT_LIMIT);
1181 TX_STATUS_FAIL(LONG_LIMIT);
1182 TX_STATUS_FAIL(UNDERRUN);
1183 TX_STATUS_FAIL(DRAIN_FLOW);
1184 TX_STATUS_FAIL(RFKILL_FLUSH);
1185 TX_STATUS_FAIL(LIFE_EXPIRE);
1186 TX_STATUS_FAIL(DEST_PS);
1187 TX_STATUS_FAIL(HOST_ABORTED);
1188 TX_STATUS_FAIL(BT_RETRY);
1189 TX_STATUS_FAIL(STA_INVALID);
1190 TX_STATUS_FAIL(FRAG_DROPPED);
1191 TX_STATUS_FAIL(TID_DISABLE);
1192 TX_STATUS_FAIL(FIFO_FLUSHED);
1193 TX_STATUS_FAIL(SMALL_CF_POLL);
1194 TX_STATUS_FAIL(FW_DROP);
1195 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1200 #undef TX_STATUS_FAIL
1201 #undef TX_STATUS_POSTPONE
1203 #endif /* CONFIG_IWLWIFI_DEBUG */
1205 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1206 enum nl80211_band band,
1207 struct ieee80211_tx_rate *r)
1209 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1210 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1211 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1212 case RATE_MCS_CHAN_WIDTH_20:
1214 case RATE_MCS_CHAN_WIDTH_40:
1215 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1217 case RATE_MCS_CHAN_WIDTH_80:
1218 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1220 case RATE_MCS_CHAN_WIDTH_160:
1221 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1224 if (rate_n_flags & RATE_MCS_SGI_MSK)
1225 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1226 if (rate_n_flags & RATE_MCS_HT_MSK) {
1227 r->flags |= IEEE80211_TX_RC_MCS;
1228 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1229 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1230 ieee80211_rate_set_vht(
1231 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1232 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1233 RATE_VHT_MCS_NSS_POS) + 1);
1234 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1236 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1242 * translate ucode response to mac80211 tx status control values
1244 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1245 struct ieee80211_tx_info *info)
1247 struct ieee80211_tx_rate *r = &info->status.rates[0];
1249 info->status.antenna =
1250 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1251 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1254 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1257 struct iwl_fw_dbg_trigger_tlv *trig;
1258 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1261 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
1264 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
1265 status_trig = (void *)trig->data;
1267 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
1270 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1271 /* don't collect on status 0 */
1272 if (!status_trig->statuses[i].status)
1275 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1278 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
1279 "Tx status %d was received",
1280 status & TX_STATUS_MSK);
1286 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1287 * @tx_resp: the Tx response from the fw (agg or non-agg)
1289 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1290 * it can't know that everything will go well until the end of the AMPDU, it
1291 * can't know in advance the number of MPDUs that will be sent in the current
1292 * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1293 * Hence, it can't know in advance what the SSN of the SCD will be at the end
1294 * of the batch. This is why the SSN of the SCD is written at the end of the
1295 * whole struct at a variable offset. This function knows how to cope with the
1296 * variable offset and returns the SSN of the SCD.
1298 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1299 struct iwl_mvm_tx_resp *tx_resp)
1301 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1302 tx_resp->frame_count) & 0xfff;
1305 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1306 struct iwl_rx_packet *pkt)
1308 struct ieee80211_sta *sta;
1309 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1310 int txq_id = SEQ_TO_QUEUE(sequence);
1311 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1312 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1313 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1314 struct agg_tx_status *agg_status =
1315 iwl_mvm_get_agg_status(mvm, tx_resp);
1316 u32 status = le16_to_cpu(agg_status->status);
1317 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1318 struct iwl_mvm_sta *mvmsta;
1319 struct sk_buff_head skbs;
1321 u16 next_reclaimed, seq_ctl;
1322 bool is_ndp = false;
1324 __skb_queue_head_init(&skbs);
1326 if (iwl_mvm_has_new_tx_api(mvm))
1327 txq_id = le16_to_cpu(tx_resp->v6.tx_queue);
1329 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1331 /* we can free until ssn % q.n_bd not inclusive */
1332 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1334 while (!skb_queue_empty(&skbs)) {
1335 struct sk_buff *skb = __skb_dequeue(&skbs);
1336 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1340 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1342 memset(&info->status, 0, sizeof(info->status));
1344 /* inform mac80211 about what happened with the frame */
1345 switch (status & TX_STATUS_MSK) {
1346 case TX_STATUS_SUCCESS:
1347 case TX_STATUS_DIRECT_DONE:
1348 info->flags |= IEEE80211_TX_STAT_ACK;
1350 case TX_STATUS_FAIL_DEST_PS:
1351 /* In DQA, the FW should have stopped the queue and not
1352 * return this status
1354 WARN_ON(iwl_mvm_is_dqa_supported(mvm));
1355 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1361 iwl_mvm_tx_status_check_trigger(mvm, status);
1363 info->status.rates[0].count = tx_resp->failure_frame + 1;
1364 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1366 info->status.status_driver_data[1] =
1367 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1369 /* Single frame failure in an AMPDU queue => send BAR */
1370 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1371 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1372 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
1373 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1374 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1376 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1377 if (status != TX_STATUS_SUCCESS) {
1378 struct ieee80211_hdr *hdr = (void *)skb->data;
1379 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1382 if (unlikely(!seq_ctl)) {
1383 struct ieee80211_hdr *hdr = (void *)skb->data;
1386 * If it is an NDP, we can't update next_reclaim since
1387 * its sequence control is 0. Note that for that same
1388 * reason, NDPs are never sent to A-MPDU'able queues
1389 * so that we can never have more than one freed frame
1390 * for a single Tx resonse (see WARN_ON below).
1392 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1397 * TODO: this is not accurate if we are freeing more than one
1400 info->status.tx_time =
1401 le16_to_cpu(tx_resp->wireless_media_time);
1402 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1403 info->status.status_driver_data[0] =
1404 (void *)(uintptr_t)tx_resp->reduced_tpc;
1406 ieee80211_tx_status(mvm->hw, skb);
1409 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue) {
1410 /* If this is an aggregation queue, we use the ssn since:
1411 * ssn = wifi seq_num % 256.
1412 * The seq_ctl is the sequence control of the packet to which
1413 * this Tx response relates. But if there is a hole in the
1414 * bitmap of the BA we received, this Tx response may allow to
1415 * reclaim the hole and all the subsequent packets that were
1416 * already acked. In that case, seq_ctl != ssn, and the next
1417 * packet to be reclaimed will be ssn and not seq_ctl. In that
1418 * case, several packets will be reclaimed even if
1421 * The ssn is the index (% 256) of the latest packet that has
1422 * treated (acked / dropped) + 1.
1424 next_reclaimed = ssn;
1426 /* The next packet to be reclaimed is the one after this one */
1427 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
1430 IWL_DEBUG_TX_REPLY(mvm,
1431 "TXQ %d status %s (0x%08x)\n",
1432 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1434 IWL_DEBUG_TX_REPLY(mvm,
1435 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1436 le32_to_cpu(tx_resp->initial_rate),
1437 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1438 ssn, next_reclaimed, seq_ctl);
1442 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1444 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1445 * the firmware while we still have packets for it in the Tx queues.
1447 if (WARN_ON_ONCE(!sta))
1451 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1453 if (tid != IWL_TID_NON_QOS && tid != IWL_MGMT_TID) {
1454 struct iwl_mvm_tid_data *tid_data =
1455 &mvmsta->tid_data[tid];
1456 bool send_eosp_ndp = false;
1458 spin_lock_bh(&mvmsta->lock);
1461 tid_data->next_reclaimed = next_reclaimed;
1462 IWL_DEBUG_TX_REPLY(mvm,
1463 "Next reclaimed packet:%d\n",
1466 IWL_DEBUG_TX_REPLY(mvm,
1467 "NDP - don't update next_reclaimed\n");
1470 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1472 if (mvmsta->sleep_tx_count) {
1473 mvmsta->sleep_tx_count--;
1474 if (mvmsta->sleep_tx_count &&
1475 !iwl_mvm_tid_queued(tid_data)) {
1477 * The number of frames in the queue
1478 * dropped to 0 even if we sent less
1479 * frames than we thought we had on the
1481 * This means we had holes in the BA
1482 * window that we just filled, ask
1483 * mac80211 to send EOSP since the
1484 * firmware won't know how to do that.
1485 * Send NDP and the firmware will send
1486 * EOSP notification that will trigger
1487 * a call to ieee80211_sta_eosp().
1489 send_eosp_ndp = true;
1493 spin_unlock_bh(&mvmsta->lock);
1494 if (send_eosp_ndp) {
1495 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1496 IEEE80211_FRAME_RELEASE_UAPSD,
1497 1, tid, false, false);
1498 mvmsta->sleep_tx_count = 0;
1499 ieee80211_send_eosp_nullfunc(sta, tid);
1503 if (mvmsta->next_status_eosp) {
1504 mvmsta->next_status_eosp = false;
1505 ieee80211_sta_eosp(sta);
1512 * If the txq is not an AMPDU queue, there is no chance we freed
1513 * several skbs. Check that out...
1515 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue)
1518 /* We can't free more than one frame at once on a shared queue */
1519 WARN_ON(skb_freed > 1);
1521 /* If we have still frames for this STA nothing to do here */
1522 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
1525 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
1528 * If there are no pending frames for this STA and
1529 * the tx to this station is not disabled, notify
1530 * mac80211 that this station can now wake up in its
1532 * If mvmsta is not NULL, sta is valid.
1535 spin_lock_bh(&mvmsta->lock);
1537 if (!mvmsta->disable_tx)
1538 ieee80211_sta_block_awake(mvm->hw, sta, false);
1540 spin_unlock_bh(&mvmsta->lock);
1543 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
1545 * We are draining and this was the last packet - pre_rcu_remove
1546 * has been called already. We might be after the
1547 * synchronize_net already.
1548 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
1550 set_bit(sta_id, mvm->sta_drained);
1551 schedule_work(&mvm->sta_drained_wk);
1558 #ifdef CONFIG_IWLWIFI_DEBUG
1559 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1560 static const char *iwl_get_agg_tx_status(u16 status)
1562 switch (status & AGG_TX_STATE_STATUS_MSK) {
1563 AGG_TX_STATE_(TRANSMITTED);
1564 AGG_TX_STATE_(UNDERRUN);
1565 AGG_TX_STATE_(BT_PRIO);
1566 AGG_TX_STATE_(FEW_BYTES);
1567 AGG_TX_STATE_(ABORT);
1568 AGG_TX_STATE_(LAST_SENT_TTL);
1569 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1570 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1571 AGG_TX_STATE_(SCD_QUERY);
1572 AGG_TX_STATE_(TEST_BAD_CRC32);
1573 AGG_TX_STATE_(RESPONSE);
1574 AGG_TX_STATE_(DUMP_TX);
1575 AGG_TX_STATE_(DELAY_TX);
1581 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1582 struct iwl_rx_packet *pkt)
1584 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1585 struct agg_tx_status *frame_status =
1586 iwl_mvm_get_agg_status(mvm, tx_resp);
1589 for (i = 0; i < tx_resp->frame_count; i++) {
1590 u16 fstatus = le16_to_cpu(frame_status[i].status);
1592 IWL_DEBUG_TX_REPLY(mvm,
1593 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1594 iwl_get_agg_tx_status(fstatus),
1595 fstatus & AGG_TX_STATE_STATUS_MSK,
1596 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1597 AGG_TX_STATE_TRY_CNT_POS,
1598 le16_to_cpu(frame_status[i].sequence));
1602 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1603 struct iwl_rx_packet *pkt)
1605 #endif /* CONFIG_IWLWIFI_DEBUG */
1607 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1608 struct iwl_rx_packet *pkt)
1610 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1611 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1612 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1613 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1614 struct iwl_mvm_sta *mvmsta;
1615 int queue = SEQ_TO_QUEUE(sequence);
1617 if (WARN_ON_ONCE(queue < mvm->first_agg_queue &&
1618 (!iwl_mvm_is_dqa_supported(mvm) ||
1619 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))))
1622 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1625 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1629 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1631 if (!WARN_ON_ONCE(!mvmsta)) {
1632 mvmsta->tid_data[tid].rate_n_flags =
1633 le32_to_cpu(tx_resp->initial_rate);
1634 mvmsta->tid_data[tid].tx_time =
1635 le16_to_cpu(tx_resp->wireless_media_time);
1641 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1643 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1644 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1646 if (tx_resp->frame_count == 1)
1647 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1649 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1652 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1654 struct ieee80211_tx_info *ba_info, u32 rate)
1656 struct sk_buff_head reclaimed_skbs;
1657 struct iwl_mvm_tid_data *tid_data;
1658 struct ieee80211_sta *sta;
1659 struct iwl_mvm_sta *mvmsta;
1660 struct sk_buff *skb;
1663 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1664 tid >= IWL_MAX_TID_COUNT,
1665 "sta_id %d tid %d", sta_id, tid))
1670 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1672 /* Reclaiming frames for a station that has been deleted ? */
1673 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1678 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1679 tid_data = &mvmsta->tid_data[tid];
1681 if (tid_data->txq_id != txq) {
1683 "invalid BA notification: Q %d, tid %d\n",
1684 tid_data->txq_id, tid);
1689 spin_lock_bh(&mvmsta->lock);
1691 __skb_queue_head_init(&reclaimed_skbs);
1694 * Release all TFDs before the SSN, i.e. all TFDs in front of
1695 * block-ack window (we assume that they've been successfully
1696 * transmitted ... if not, it's too late anyway).
1698 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1700 tid_data->next_reclaimed = index;
1702 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1705 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1707 skb_queue_walk(&reclaimed_skbs, skb) {
1708 struct ieee80211_hdr *hdr = (void *)skb->data;
1709 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1711 if (ieee80211_is_data_qos(hdr->frame_control))
1716 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1718 memset(&info->status, 0, sizeof(info->status));
1719 /* Packet was transmitted successfully, failures come as single
1720 * frames because before failing a frame the firmware transmits
1721 * it without aggregation at least once.
1723 info->flags |= IEEE80211_TX_STAT_ACK;
1725 /* this is the first skb we deliver in this batch */
1726 /* put the rate scaling data there */
1728 info->flags |= IEEE80211_TX_STAT_AMPDU;
1729 memcpy(&info->status, &ba_info->status,
1730 sizeof(ba_info->status));
1731 iwl_mvm_hwrate_to_tx_status(rate, info);
1735 spin_unlock_bh(&mvmsta->lock);
1737 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1738 * possible (i.e. first MPDU in the aggregation wasn't acked)
1739 * Still it's important to update RS about sent vs. acked.
1741 if (skb_queue_empty(&reclaimed_skbs)) {
1742 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1746 rcu_dereference(mvmsta->vif->chanctx_conf);
1748 if (WARN_ON_ONCE(!chanctx_conf))
1751 ba_info->band = chanctx_conf->def.chan->band;
1752 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1754 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1755 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1761 while (!skb_queue_empty(&reclaimed_skbs)) {
1762 skb = __skb_dequeue(&reclaimed_skbs);
1763 ieee80211_tx_status(mvm->hw, skb);
1767 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1769 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1770 int sta_id, tid, txq, index;
1771 struct ieee80211_tx_info ba_info = {};
1772 struct iwl_mvm_ba_notif *ba_notif;
1773 struct iwl_mvm_tid_data *tid_data;
1774 struct iwl_mvm_sta *mvmsta;
1776 if (iwl_mvm_has_new_tx_api(mvm)) {
1777 struct iwl_mvm_compressed_ba_notif *ba_res =
1780 sta_id = ba_res->sta_id;
1781 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1782 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1783 ba_info.status.tx_time =
1784 (u16)le32_to_cpu(ba_res->wireless_time);
1785 ba_info.status.status_driver_data[0] =
1786 (void *)(uintptr_t)ba_res->reduced_txp;
1790 * When supporting multi TID aggregations - we need to move
1791 * next_reclaimed to be per TXQ and not per TID or handle it
1792 * in a different way.
1793 * This will go together with SN and AddBA offload and cannot
1794 * be handled properly for now.
1796 WARN_ON(le16_to_cpu(ba_res->ra_tid_cnt) != 1);
1797 tid = ba_res->ra_tid[0].tid;
1798 if (tid == IWL_MGMT_TID)
1799 tid = IWL_MAX_TID_COUNT;
1800 iwl_mvm_tx_reclaim(mvm, sta_id, tid,
1801 (int)(le16_to_cpu(ba_res->tfd[0].q_num)),
1802 le16_to_cpu(ba_res->tfd[0].tfd_index),
1803 &ba_info, le32_to_cpu(ba_res->tx_rate));
1805 IWL_DEBUG_TX_REPLY(mvm,
1806 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1807 sta_id, le32_to_cpu(ba_res->flags),
1808 le16_to_cpu(ba_res->txed),
1809 le16_to_cpu(ba_res->done));
1813 ba_notif = (void *)pkt->data;
1814 sta_id = ba_notif->sta_id;
1815 tid = ba_notif->tid;
1816 /* "flow" corresponds to Tx queue */
1817 txq = le16_to_cpu(ba_notif->scd_flow);
1818 /* "ssn" is start of block-ack Tx window, corresponds to index
1819 * (in Tx queue's circular buffer) of first TFD/frame in window */
1820 index = le16_to_cpu(ba_notif->scd_ssn);
1823 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1824 if (WARN_ON_ONCE(!mvmsta)) {
1829 tid_data = &mvmsta->tid_data[tid];
1831 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1832 ba_info.status.ampdu_len = ba_notif->txed;
1833 ba_info.status.tx_time = tid_data->tx_time;
1834 ba_info.status.status_driver_data[0] =
1835 (void *)(uintptr_t)ba_notif->reduced_txp;
1839 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1840 tid_data->rate_n_flags);
1842 IWL_DEBUG_TX_REPLY(mvm,
1843 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1844 (u8 *)&ba_notif->sta_addr_lo32, ba_notif->sta_id);
1846 IWL_DEBUG_TX_REPLY(mvm,
1847 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1848 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1849 le64_to_cpu(ba_notif->bitmap), txq, index,
1850 ba_notif->txed, ba_notif->txed_2_done);
1852 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1853 ba_notif->reduced_txp);
1857 * Note that there are transports that buffer frames before they reach
1858 * the firmware. This means that after flush_tx_path is called, the
1859 * queue might not be empty. The race-free way to handle this is to:
1860 * 1) set the station as draining
1861 * 2) flush the Tx path
1862 * 3) wait for the transport queues to be empty
1864 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1867 struct iwl_tx_path_flush_cmd flush_cmd = {
1868 .queues_ctl = cpu_to_le32(tfd_msk),
1869 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1872 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1873 sizeof(flush_cmd), &flush_cmd);
1875 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);