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
11 * Copyright(c) 2018 - 2019 Intel Corporation
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of version 2 of the GNU General Public License as
15 * published by the Free Software Foundation.
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
22 * The full GNU General Public License is included in this distribution
23 * in the file called COPYING.
25 * Contact Information:
26 * Intel Linux Wireless <linuxwifi@intel.com>
27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
32 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
33 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
34 * Copyright(c) 2018 - 2019 Intel Corporation
35 * All rights reserved.
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
41 * * Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * * Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in
45 * the documentation and/or other materials provided with the
47 * * Neither the name Intel Corporation nor the names of its
48 * contributors may be used to endorse or promote products derived
49 * from this software without specific prior written permission.
51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63 *****************************************************************************/
64 #include <linux/ieee80211.h>
65 #include <linux/etherdevice.h>
66 #include <linux/tcp.h>
70 #include "iwl-trans.h"
71 #include "iwl-eeprom-parse.h"
76 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
79 struct iwl_fw_dbg_trigger_tlv *trig;
80 struct iwl_fw_dbg_trigger_ba *ba_trig;
82 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA);
86 ba_trig = (void *)trig->data;
88 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
91 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
92 "BAR sent to %pM, tid %d, ssn %d",
96 #define OPT_HDR(type, skb, off) \
97 (type *)(skb_network_header(skb) + (off))
99 static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
100 struct ieee80211_hdr *hdr,
101 struct ieee80211_tx_info *info,
104 #if IS_ENABLED(CONFIG_INET)
105 u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
109 * Do not compute checksum if already computed or if transport will
112 if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD)
115 /* We do not expect to be requested to csum stuff we do not support */
116 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
117 (skb->protocol != htons(ETH_P_IP) &&
118 skb->protocol != htons(ETH_P_IPV6)),
119 "No support for requested checksum\n")) {
120 skb_checksum_help(skb);
124 if (skb->protocol == htons(ETH_P_IP)) {
125 protocol = ip_hdr(skb)->protocol;
127 #if IS_ENABLED(CONFIG_IPV6)
128 struct ipv6hdr *ipv6h =
129 (struct ipv6hdr *)skb_network_header(skb);
130 unsigned int off = sizeof(*ipv6h);
132 protocol = ipv6h->nexthdr;
133 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
134 struct ipv6_opt_hdr *hp;
136 /* only supported extension headers */
137 if (protocol != NEXTHDR_ROUTING &&
138 protocol != NEXTHDR_HOP &&
139 protocol != NEXTHDR_DEST) {
140 skb_checksum_help(skb);
144 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
145 protocol = hp->nexthdr;
146 off += ipv6_optlen(hp);
148 /* if we get here - protocol now should be TCP/UDP */
152 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
154 skb_checksum_help(skb);
159 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
162 * Set offset to IP header (snap).
163 * We don't support tunneling so no need to take care of inner header.
166 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
168 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
169 if (skb->protocol == htons(ETH_P_IP) &&
170 (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) {
171 ip_hdr(skb)->check = 0;
172 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
175 /* reset UDP/TCP header csum */
176 if (protocol == IPPROTO_TCP)
177 tcp_hdr(skb)->check = 0;
179 udp_hdr(skb)->check = 0;
182 * mac header len should include IV, size is in words unless
183 * the IV is added by the firmware like in WEP.
184 * In new Tx API, the IV is always added by the firmware.
186 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
187 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
188 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104)
189 mh_len += info->control.hw_key->iv_len;
191 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
195 return offload_assist;
199 * Sets most of the Tx cmd's fields
201 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
202 struct iwl_tx_cmd *tx_cmd,
203 struct ieee80211_tx_info *info, u8 sta_id)
205 struct ieee80211_hdr *hdr = (void *)skb->data;
206 __le16 fc = hdr->frame_control;
207 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
208 u32 len = skb->len + FCS_LEN;
209 u16 offload_assist = 0;
212 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) ||
213 (ieee80211_is_probe_resp(fc) &&
214 !is_multicast_ether_addr(hdr->addr1)))
215 tx_flags |= TX_CMD_FLG_ACK;
217 tx_flags &= ~TX_CMD_FLG_ACK;
219 if (ieee80211_is_probe_resp(fc))
220 tx_flags |= TX_CMD_FLG_TSF;
222 if (ieee80211_has_morefrags(fc))
223 tx_flags |= TX_CMD_FLG_MORE_FRAG;
225 if (ieee80211_is_data_qos(fc)) {
226 u8 *qc = ieee80211_get_qos_ctl(hdr);
227 tx_cmd->tid_tspec = qc[0] & 0xf;
228 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
229 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
230 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
231 } else if (ieee80211_is_back_req(fc)) {
232 struct ieee80211_bar *bar = (void *)skb->data;
233 u16 control = le16_to_cpu(bar->control);
234 u16 ssn = le16_to_cpu(bar->start_seq_num);
236 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
237 tx_cmd->tid_tspec = (control &
238 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
239 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
240 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
241 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
244 if (ieee80211_is_data(fc))
245 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
247 tx_cmd->tid_tspec = IWL_MAX_TID_COUNT;
249 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
250 tx_flags |= TX_CMD_FLG_SEQ_CTL;
252 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
255 /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */
256 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
257 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
259 ac = tid_to_mac80211_ac[0];
261 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
262 TX_CMD_FLG_BT_PRIO_POS;
264 if (ieee80211_is_mgmt(fc)) {
265 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
266 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
267 else if (ieee80211_is_action(fc))
268 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
270 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
272 /* The spec allows Action frames in A-MPDU, we don't support
275 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
276 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
277 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
279 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
282 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
283 !is_multicast_ether_addr(hdr->addr1))
284 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
286 if (fw_has_capa(&mvm->fw->ucode_capa,
287 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
288 ieee80211_action_contains_tpc(skb))
289 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
291 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
292 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
293 tx_cmd->len = cpu_to_le16((u16)skb->len);
294 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
295 tx_cmd->sta_id = sta_id;
297 /* padding is inserted later in transport */
298 if (ieee80211_hdrlen(fc) % 4 &&
299 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
300 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
302 tx_cmd->offload_assist |=
303 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info,
307 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm,
308 struct ieee80211_tx_info *info,
309 struct ieee80211_sta *sta, __le16 fc)
311 if (info->band == NL80211_BAND_2GHZ &&
312 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
313 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
315 if (sta && ieee80211_is_data(fc)) {
316 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
318 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS;
321 return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
324 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
325 struct ieee80211_tx_info *info,
326 struct ieee80211_sta *sta)
332 /* HT rate doesn't make sense for a non data frame */
333 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
334 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n",
335 info->control.rates[0].flags,
336 info->control.rates[0].idx);
338 rate_idx = info->control.rates[0].idx;
339 /* if the rate isn't a well known legacy rate, take the lowest one */
340 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
341 rate_idx = rate_lowest_index(
342 &mvm->nvm_data->bands[info->band], sta);
344 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
345 if (info->band == NL80211_BAND_5GHZ)
346 rate_idx += IWL_FIRST_OFDM_RATE;
348 /* For 2.4 GHZ band, check that there is no need to remap */
349 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
351 /* Get PLCP rate for tx_cmd->rate_n_flags */
352 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
354 /* Set CCK flag as needed */
355 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
356 rate_flags |= RATE_MCS_CCK_MSK;
358 return (u32)rate_plcp | rate_flags;
361 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,
362 struct ieee80211_tx_info *info,
363 struct ieee80211_sta *sta, __le16 fc)
365 return iwl_mvm_get_tx_rate(mvm, info, sta) |
366 iwl_mvm_get_tx_ant(mvm, info, sta, fc);
370 * Sets the fields in the Tx cmd that are rate related
372 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
373 struct ieee80211_tx_info *info,
374 struct ieee80211_sta *sta, __le16 fc)
376 /* Set retry limit on RTS packets */
377 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
379 /* Set retry limit on DATA packets and Probe Responses*/
380 if (ieee80211_is_probe_resp(fc)) {
381 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
382 tx_cmd->rts_retry_limit =
383 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
384 } else if (ieee80211_is_back_req(fc)) {
385 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
387 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
391 * for data packets, rate info comes from the table inside the fw. This
392 * table is controlled by LINK_QUALITY commands
395 if (ieee80211_is_data(fc) && sta) {
396 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
398 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
399 tx_cmd->initial_rate_index = 0;
400 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
403 } else if (ieee80211_is_back_req(fc)) {
405 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
408 /* Set the rate in the TX cmd */
409 tx_cmd->rate_n_flags =
410 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc));
413 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
416 struct ieee80211_key_conf *keyconf = info->control.hw_key;
419 pn = atomic64_inc_return(&keyconf->tx_pn);
422 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
423 crypto_hdr[1] = pn >> 8;
424 crypto_hdr[4] = pn >> 16;
425 crypto_hdr[5] = pn >> 24;
426 crypto_hdr[6] = pn >> 32;
427 crypto_hdr[7] = pn >> 40;
431 * Sets the fields in the Tx cmd that are crypto related
433 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
434 struct ieee80211_tx_info *info,
435 struct iwl_tx_cmd *tx_cmd,
436 struct sk_buff *skb_frag,
439 struct ieee80211_key_conf *keyconf = info->control.hw_key;
440 u8 *crypto_hdr = skb_frag->data + hdrlen;
441 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;
444 switch (keyconf->cipher) {
445 case WLAN_CIPHER_SUITE_CCMP:
446 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
447 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
450 case WLAN_CIPHER_SUITE_TKIP:
451 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
452 pn = atomic64_inc_return(&keyconf->tx_pn);
453 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
454 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
457 case WLAN_CIPHER_SUITE_WEP104:
458 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
460 case WLAN_CIPHER_SUITE_WEP40:
461 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
462 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
463 TX_CMD_SEC_WEP_KEY_IDX_MSK);
465 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
467 case WLAN_CIPHER_SUITE_GCMP:
468 case WLAN_CIPHER_SUITE_GCMP_256:
469 type = TX_CMD_SEC_GCMP;
471 case WLAN_CIPHER_SUITE_CCMP_256:
472 /* TODO: Taking the key from the table might introduce a race
473 * when PTK rekeying is done, having an old packets with a PN
474 * based on the old key but the message encrypted with a new
476 * Need to handle this.
478 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;
479 tx_cmd->key[0] = keyconf->hw_key_idx;
480 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
483 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
488 * Allocates and sets the Tx cmd the driver data pointers in the skb
490 static struct iwl_device_cmd *
491 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
492 struct ieee80211_tx_info *info, int hdrlen,
493 struct ieee80211_sta *sta, u8 sta_id)
495 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
496 struct iwl_device_cmd *dev_cmd;
497 struct iwl_tx_cmd *tx_cmd;
499 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
501 if (unlikely(!dev_cmd))
504 /* Make sure we zero enough of dev_cmd */
505 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd));
506 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen3) > sizeof(*tx_cmd));
508 memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd));
509 dev_cmd->hdr.cmd = TX_CMD;
511 if (iwl_mvm_has_new_tx_api(mvm)) {
512 u16 offload_assist = 0;
513 u32 rate_n_flags = 0;
515 struct iwl_mvm_sta *mvmsta = sta ?
516 iwl_mvm_sta_from_mac80211(sta) : NULL;
518 if (ieee80211_is_data_qos(hdr->frame_control)) {
519 u8 *qc = ieee80211_get_qos_ctl(hdr);
521 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
522 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
525 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info,
528 /* padding is inserted later in transport */
529 if (ieee80211_hdrlen(hdr->frame_control) % 4 &&
530 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
531 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
533 if (!info->control.hw_key)
534 flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
537 * For data packets rate info comes from the fw. Only
538 * set rate/antenna during connection establishment or in case
539 * no station is given.
541 if (!sta || !ieee80211_is_data(hdr->frame_control) ||
542 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
543 flags |= IWL_TX_FLAGS_CMD_RATE;
545 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
549 if (mvm->trans->cfg->device_family >=
550 IWL_DEVICE_FAMILY_22560) {
551 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
553 cmd->offload_assist |= cpu_to_le32(offload_assist);
555 /* Total # bytes to be transmitted */
556 cmd->len = cpu_to_le16((u16)skb->len);
558 /* Copy MAC header from skb into command buffer */
559 memcpy(cmd->hdr, hdr, hdrlen);
561 cmd->flags = cpu_to_le16(flags);
562 cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
564 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
566 cmd->offload_assist |= cpu_to_le16(offload_assist);
568 /* Total # bytes to be transmitted */
569 cmd->len = cpu_to_le16((u16)skb->len);
571 /* Copy MAC header from skb into command buffer */
572 memcpy(cmd->hdr, hdr, hdrlen);
574 cmd->flags = cpu_to_le32(flags);
575 cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
580 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
582 if (info->control.hw_key)
583 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
585 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
587 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
589 /* Copy MAC header from skb into command buffer */
590 memcpy(tx_cmd->hdr, hdr, hdrlen);
596 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
597 struct iwl_device_cmd *cmd)
599 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
601 memset(&skb_info->status, 0, sizeof(skb_info->status));
602 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
604 skb_info->driver_data[1] = cmd;
607 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
608 struct ieee80211_tx_info *info,
609 struct ieee80211_hdr *hdr)
611 struct iwl_mvm_vif *mvmvif =
612 iwl_mvm_vif_from_mac80211(info->control.vif);
613 __le16 fc = hdr->frame_control;
615 switch (info->control.vif->type) {
616 case NL80211_IFTYPE_AP:
617 case NL80211_IFTYPE_ADHOC:
619 * Non-bufferable frames use the broadcast station, thus they
620 * use the probe queue.
621 * Also take care of the case where we send a deauth to a
622 * station that we don't have, or similarly an association
623 * response (with non-success status) for a station we can't
625 * Also, disassociate frames might happen, particular with
626 * reason 7 ("Class 3 frame received from nonassociated STA").
628 if (ieee80211_is_mgmt(fc) &&
629 (!ieee80211_is_bufferable_mmpdu(fc) ||
630 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
631 return mvm->probe_queue;
633 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
634 is_multicast_ether_addr(hdr->addr1))
635 return mvmvif->cab_queue;
637 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
638 "fc=0x%02x", le16_to_cpu(fc));
639 return mvm->probe_queue;
640 case NL80211_IFTYPE_P2P_DEVICE:
641 if (ieee80211_is_mgmt(fc))
642 return mvm->p2p_dev_queue;
645 return mvm->p2p_dev_queue;
647 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
652 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
655 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
656 struct iwl_mvm_vif *mvmvif =
657 iwl_mvm_vif_from_mac80211(info->control.vif);
658 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
659 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
660 struct iwl_probe_resp_data *resp_data;
663 (WLAN_OUI_WFA >> 16) & 0xff,
664 (WLAN_OUI_WFA >> 8) & 0xff,
666 WLAN_OUI_TYPE_WFA_P2P,
671 resp_data = rcu_dereference(mvmvif->probe_resp_data);
675 if (!resp_data->notif.noa_active)
678 ie = (u8 *)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
679 mgmt->u.probe_resp.variable,
683 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
687 if (skb_tailroom(skb) < resp_data->noa_len) {
688 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
690 "Failed to reallocate probe resp\n");
695 pos = skb_put(skb, resp_data->noa_len);
697 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
698 /* Set length of IE body (not including ID and length itself) */
699 *pos++ = resp_data->noa_len - 2;
700 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
701 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
702 *pos++ = WLAN_OUI_WFA & 0xff;
703 *pos++ = WLAN_OUI_TYPE_WFA_P2P;
705 memcpy(pos, &resp_data->notif.noa_attr,
706 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
712 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
714 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
715 struct ieee80211_tx_info info;
716 struct iwl_device_cmd *dev_cmd;
718 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
719 __le16 fc = hdr->frame_control;
720 bool offchannel = IEEE80211_SKB_CB(skb)->flags &
721 IEEE80211_TX_CTL_TX_OFFCHAN;
724 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
727 memcpy(&info, skb->cb, sizeof(info));
729 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
732 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
735 if (info.control.vif) {
736 struct iwl_mvm_vif *mvmvif =
737 iwl_mvm_vif_from_mac80211(info.control.vif);
739 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
740 info.control.vif->type == NL80211_IFTYPE_AP ||
741 info.control.vif->type == NL80211_IFTYPE_ADHOC) {
742 if (!ieee80211_is_data(hdr->frame_control))
743 sta_id = mvmvif->bcast_sta.sta_id;
745 sta_id = mvmvif->mcast_sta.sta_id;
747 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr);
748 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
749 queue = mvm->snif_queue;
750 sta_id = mvm->snif_sta.sta_id;
751 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
754 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
755 * that can be used in 2 different types of vifs, P2P &
757 * P2P uses the offchannel queue.
758 * STATION (HS2.0) uses the auxiliary context of the FW,
759 * and hence needs to be sent on the aux queue.
761 sta_id = mvm->aux_sta.sta_id;
762 queue = mvm->aux_queue;
767 IWL_ERR(mvm, "No queue was found. Dropping TX\n");
771 if (unlikely(ieee80211_is_probe_resp(fc)))
772 iwl_mvm_probe_resp_set_noa(mvm, skb);
774 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
776 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
780 /* From now on, we cannot access info->control */
781 iwl_mvm_skb_prepare_status(skb, dev_cmd);
783 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
784 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
791 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
792 struct ieee80211_sta *sta, unsigned int tid)
794 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
795 enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band;
796 u8 ac = tid_to_mac80211_ac[tid];
798 int lmac = IWL_LMAC_24G_INDEX;
800 if (iwl_mvm_is_cdb_supported(mvm) &&
801 band == NL80211_BAND_5GHZ)
802 lmac = IWL_LMAC_5G_INDEX;
804 /* For HE redirect to trigger based fifos */
805 if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
808 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
811 * Don't send an AMSDU that will be longer than the TXF.
812 * Add a security margin of 256 for the TX command + headers.
813 * We also want to have the start of the next packet inside the
814 * fifo to be able to send bursts.
816 return min_t(unsigned int, mvmsta->max_amsdu_len,
817 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
823 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
824 netdev_features_t netdev_flags,
825 struct sk_buff_head *mpdus_skb)
827 struct sk_buff *tmp, *next;
828 struct ieee80211_hdr *hdr = (void *)skb->data;
829 char cb[sizeof(skb->cb)];
831 unsigned int tcp_payload_len;
832 unsigned int mss = skb_shinfo(skb)->gso_size;
833 bool ipv4 = (skb->protocol == htons(ETH_P_IP));
834 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
836 skb_shinfo(skb)->gso_size = num_subframes * mss;
837 memcpy(cb, skb->cb, sizeof(cb));
839 next = skb_gso_segment(skb, netdev_flags);
840 skb_shinfo(skb)->gso_size = mss;
841 if (WARN_ON_ONCE(IS_ERR(next)))
850 memcpy(tmp->cb, cb, sizeof(tmp->cb));
852 * Compute the length of all the data added for the A-MSDU.
853 * This will be used to compute the length to write in the TX
854 * command. We have: SNAP + IP + TCP for n -1 subframes and
855 * ETH header for n subframes.
857 tcp_payload_len = skb_tail_pointer(tmp) -
858 skb_transport_header(tmp) -
859 tcp_hdrlen(tmp) + tmp->data_len;
862 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
864 if (tcp_payload_len > mss) {
865 skb_shinfo(tmp)->gso_size = mss;
867 if (ieee80211_is_data_qos(hdr->frame_control)) {
871 ip_send_check(ip_hdr(tmp));
873 qc = ieee80211_get_qos_ctl((void *)tmp->data);
874 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
876 skb_shinfo(tmp)->gso_size = 0;
882 __skb_queue_tail(mpdus_skb, tmp);
889 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
890 struct ieee80211_tx_info *info,
891 struct ieee80211_sta *sta,
892 struct sk_buff_head *mpdus_skb)
894 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
895 struct ieee80211_hdr *hdr = (void *)skb->data;
896 unsigned int mss = skb_shinfo(skb)->gso_size;
897 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
898 u16 snap_ip_tcp, pad;
899 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
902 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
905 if (!mvmsta->max_amsdu_len ||
906 !ieee80211_is_data_qos(hdr->frame_control) ||
907 !mvmsta->amsdu_enabled)
908 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
911 * Do not build AMSDU for IPv6 with extension headers.
912 * ask stack to segment and checkum the generated MPDUs for us.
914 if (skb->protocol == htons(ETH_P_IPV6) &&
915 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
917 netdev_flags &= ~NETIF_F_CSUM_MASK;
918 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
921 tid = ieee80211_get_tid(hdr);
922 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
926 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
927 * during an BA session.
929 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
930 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed)
931 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
933 if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) ||
934 !(mvmsta->amsdu_enabled & BIT(tid)))
935 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
937 max_amsdu_len = iwl_mvm_max_amsdu_size(mvm, sta, tid);
940 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
941 * supported. This is a spec requirement (IEEE 802.11-2015
942 * section 8.7.3 NOTE 3).
944 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
945 !sta->vht_cap.vht_supported)
946 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
948 /* Sub frame header + SNAP + IP header + TCP header + MSS */
949 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
950 pad = (4 - subf_len) & 0x3;
953 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
954 * N * subf_len + (N - 1) * pad.
956 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
958 if (sta->max_amsdu_subframes &&
959 num_subframes > sta->max_amsdu_subframes)
960 num_subframes = sta->max_amsdu_subframes;
962 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
963 tcp_hdrlen(skb) + skb->data_len;
966 * Make sure we have enough TBs for the A-MSDU:
967 * 2 for each subframe
968 * 1 more for each fragment
969 * 1 more for the potential data in the header
971 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
972 mvm->trans->max_skb_frags)
975 if (num_subframes > 1)
976 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
978 /* This skb fits in one single A-MSDU */
979 if (num_subframes * mss >= tcp_payload_len) {
980 __skb_queue_tail(mpdus_skb, skb);
985 * Trick the segmentation function to make it
986 * create SKBs that can fit into one A-MSDU.
988 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
991 #else /* CONFIG_INET */
992 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
993 struct ieee80211_tx_info *info,
994 struct ieee80211_sta *sta,
995 struct sk_buff_head *mpdus_skb)
997 /* Impossible to get TSO with CONFIG_INET */
1004 /* Check if there are any timed-out TIDs on a given shared TXQ */
1005 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
1007 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1008 unsigned long now = jiffies;
1011 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1014 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1015 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1016 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1023 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1024 struct iwl_mvm_sta *mvmsta,
1027 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1028 struct iwl_mvm_tcm_mac *mdata;
1030 if (mac >= NUM_MAC_INDEX_DRIVER)
1033 mdata = &mvm->tcm.data[mac];
1035 if (mvm->tcm.paused)
1038 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1039 schedule_delayed_work(&mvm->tcm.work, 0);
1041 mdata->tx.airtime += airtime;
1044 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1045 struct iwl_mvm_sta *mvmsta, int tid)
1047 u32 ac = tid_to_mac80211_ac[tid];
1048 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1049 struct iwl_mvm_tcm_mac *mdata;
1051 if (mac >= NUM_MAC_INDEX_DRIVER)
1054 mdata = &mvm->tcm.data[mac];
1056 mdata->tx.pkts[ac]++;
1062 * Sets the fields in the Tx cmd that are crypto related.
1064 * This function must be called with BHs disabled.
1066 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1067 struct ieee80211_tx_info *info,
1068 struct ieee80211_sta *sta)
1070 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1071 struct iwl_mvm_sta *mvmsta;
1072 struct iwl_device_cmd *dev_cmd;
1075 u8 tid = IWL_MAX_TID_COUNT;
1077 bool is_ampdu = false;
1080 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1081 fc = hdr->frame_control;
1082 hdrlen = ieee80211_hdrlen(fc);
1084 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
1087 if (WARN_ON_ONCE(!mvmsta))
1090 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1093 if (unlikely(ieee80211_is_probe_resp(fc)))
1094 iwl_mvm_probe_resp_set_noa(mvm, skb);
1096 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1097 sta, mvmsta->sta_id);
1102 * we handle that entirely ourselves -- for uAPSD the firmware
1103 * will always send a notification, and for PS-Poll responses
1104 * we'll notify mac80211 when getting frame status
1106 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1108 spin_lock(&mvmsta->lock);
1110 /* nullfunc frames should go to the MGMT queue regardless of QOS,
1111 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
1112 * assignment of MGMT TID
1114 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1115 tid = ieee80211_get_tid(hdr);
1116 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1117 goto drop_unlock_sta;
1119 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1120 if (WARN_ONCE(is_ampdu &&
1121 mvmsta->tid_data[tid].state != IWL_AGG_ON,
1122 "Invalid internal agg state %d for TID %d",
1123 mvmsta->tid_data[tid].state, tid))
1124 goto drop_unlock_sta;
1126 seq_number = mvmsta->tid_data[tid].seq_number;
1127 seq_number &= IEEE80211_SCTL_SEQ;
1129 if (!iwl_mvm_has_new_tx_api(mvm)) {
1130 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1132 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1133 hdr->seq_ctrl |= cpu_to_le16(seq_number);
1134 /* update the tx_cmd hdr as it was already copied */
1135 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1137 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) {
1138 tid = IWL_TID_NON_QOS;
1141 txq_id = mvmsta->tid_data[tid].txq_id;
1143 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1145 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1146 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1147 spin_unlock(&mvmsta->lock);
1151 if (!iwl_mvm_has_new_tx_api(mvm)) {
1152 /* Keep track of the time of the last frame for this RA/TID */
1153 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1156 * If we have timed-out TIDs - schedule the worker that will
1157 * reconfig the queues and update them
1159 * Note that the no lock is taken here in order to not serialize
1160 * the TX flow. This isn't dangerous because scheduling
1161 * mvm->add_stream_wk can't ruin the state, and if we DON'T
1162 * schedule it due to some race condition then next TX we get
1165 if (unlikely(mvm->queue_info[txq_id].status ==
1166 IWL_MVM_QUEUE_SHARED &&
1167 iwl_mvm_txq_should_update(mvm, txq_id)))
1168 schedule_work(&mvm->add_stream_wk);
1171 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
1172 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
1174 /* From now on, we cannot access info->control */
1175 iwl_mvm_skb_prepare_status(skb, dev_cmd);
1177 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1178 goto drop_unlock_sta;
1180 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1181 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1183 spin_unlock(&mvmsta->lock);
1185 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1186 tid == IWL_MAX_TID_COUNT ? 0 : tid))
1192 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1193 spin_unlock(&mvmsta->lock);
1195 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid);
1199 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
1200 struct ieee80211_sta *sta)
1202 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1203 struct ieee80211_tx_info info;
1204 struct sk_buff_head mpdus_skbs;
1205 unsigned int payload_len;
1208 if (WARN_ON_ONCE(!mvmsta))
1211 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1214 memcpy(&info, skb->cb, sizeof(info));
1216 if (!skb_is_gso(skb))
1217 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1219 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1220 tcp_hdrlen(skb) + skb->data_len;
1222 if (payload_len <= skb_shinfo(skb)->gso_size)
1223 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1225 __skb_queue_head_init(&mpdus_skbs);
1227 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1231 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1234 while (!skb_queue_empty(&mpdus_skbs)) {
1235 skb = __skb_dequeue(&mpdus_skbs);
1237 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1239 __skb_queue_purge(&mpdus_skbs);
1247 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1248 struct ieee80211_sta *sta, u8 tid)
1250 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1251 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1252 struct ieee80211_vif *vif = mvmsta->vif;
1255 lockdep_assert_held(&mvmsta->lock);
1257 if ((tid_data->state == IWL_AGG_ON ||
1258 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1259 iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1261 * Now that this aggregation or DQA queue is empty tell
1262 * mac80211 so it knows we no longer have frames buffered for
1263 * the station on this TID (for the TIM bitmap calculation.)
1265 ieee80211_sta_set_buffered(sta, tid, false);
1269 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1270 * to align the wrap around of ssn so we compare relevant values.
1272 normalized_ssn = tid_data->ssn;
1273 if (mvm->trans->cfg->gen2)
1274 normalized_ssn &= 0xff;
1276 if (normalized_ssn != tid_data->next_reclaimed)
1279 switch (tid_data->state) {
1280 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1281 IWL_DEBUG_TX_QUEUES(mvm,
1282 "Can continue addBA flow ssn = next_recl = %d\n",
1283 tid_data->next_reclaimed);
1284 tid_data->state = IWL_AGG_STARTING;
1285 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1288 case IWL_EMPTYING_HW_QUEUE_DELBA:
1289 IWL_DEBUG_TX_QUEUES(mvm,
1290 "Can continue DELBA flow ssn = next_recl = %d\n",
1291 tid_data->next_reclaimed);
1292 tid_data->state = IWL_AGG_OFF;
1293 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1301 #ifdef CONFIG_IWLWIFI_DEBUG
1302 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1304 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1305 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1307 switch (status & TX_STATUS_MSK) {
1308 case TX_STATUS_SUCCESS:
1310 TX_STATUS_POSTPONE(DELAY);
1311 TX_STATUS_POSTPONE(FEW_BYTES);
1312 TX_STATUS_POSTPONE(BT_PRIO);
1313 TX_STATUS_POSTPONE(QUIET_PERIOD);
1314 TX_STATUS_POSTPONE(CALC_TTAK);
1315 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1316 TX_STATUS_FAIL(SHORT_LIMIT);
1317 TX_STATUS_FAIL(LONG_LIMIT);
1318 TX_STATUS_FAIL(UNDERRUN);
1319 TX_STATUS_FAIL(DRAIN_FLOW);
1320 TX_STATUS_FAIL(RFKILL_FLUSH);
1321 TX_STATUS_FAIL(LIFE_EXPIRE);
1322 TX_STATUS_FAIL(DEST_PS);
1323 TX_STATUS_FAIL(HOST_ABORTED);
1324 TX_STATUS_FAIL(BT_RETRY);
1325 TX_STATUS_FAIL(STA_INVALID);
1326 TX_STATUS_FAIL(FRAG_DROPPED);
1327 TX_STATUS_FAIL(TID_DISABLE);
1328 TX_STATUS_FAIL(FIFO_FLUSHED);
1329 TX_STATUS_FAIL(SMALL_CF_POLL);
1330 TX_STATUS_FAIL(FW_DROP);
1331 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1336 #undef TX_STATUS_FAIL
1337 #undef TX_STATUS_POSTPONE
1339 #endif /* CONFIG_IWLWIFI_DEBUG */
1341 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1342 enum nl80211_band band,
1343 struct ieee80211_tx_rate *r)
1345 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1346 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1347 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1348 case RATE_MCS_CHAN_WIDTH_20:
1350 case RATE_MCS_CHAN_WIDTH_40:
1351 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1353 case RATE_MCS_CHAN_WIDTH_80:
1354 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1356 case RATE_MCS_CHAN_WIDTH_160:
1357 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1360 if (rate_n_flags & RATE_MCS_SGI_MSK)
1361 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1362 if (rate_n_flags & RATE_MCS_HT_MSK) {
1363 r->flags |= IEEE80211_TX_RC_MCS;
1364 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1365 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1366 ieee80211_rate_set_vht(
1367 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1368 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1369 RATE_VHT_MCS_NSS_POS) + 1);
1370 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1372 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1378 * translate ucode response to mac80211 tx status control values
1380 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1381 struct ieee80211_tx_info *info)
1383 struct ieee80211_tx_rate *r = &info->status.rates[0];
1385 info->status.antenna =
1386 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1387 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1390 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1393 struct iwl_fw_dbg_trigger_tlv *trig;
1394 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1397 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1398 FW_DBG_TRIGGER_TX_STATUS);
1402 status_trig = (void *)trig->data;
1404 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1405 /* don't collect on status 0 */
1406 if (!status_trig->statuses[i].status)
1409 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1412 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1413 "Tx status %d was received",
1414 status & TX_STATUS_MSK);
1420 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1421 * @tx_resp: the Tx response from the fw (agg or non-agg)
1423 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1424 * it can't know that everything will go well until the end of the AMPDU, it
1425 * can't know in advance the number of MPDUs that will be sent in the current
1426 * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1427 * Hence, it can't know in advance what the SSN of the SCD will be at the end
1428 * of the batch. This is why the SSN of the SCD is written at the end of the
1429 * whole struct at a variable offset. This function knows how to cope with the
1430 * variable offset and returns the SSN of the SCD.
1432 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1433 struct iwl_mvm_tx_resp *tx_resp)
1435 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1436 tx_resp->frame_count) & 0xfff;
1439 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1440 struct iwl_rx_packet *pkt)
1442 struct ieee80211_sta *sta;
1443 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1444 int txq_id = SEQ_TO_QUEUE(sequence);
1445 /* struct iwl_mvm_tx_resp_v3 is almost the same */
1446 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1447 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1448 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1449 struct agg_tx_status *agg_status =
1450 iwl_mvm_get_agg_status(mvm, tx_resp);
1451 u32 status = le16_to_cpu(agg_status->status);
1452 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1453 struct sk_buff_head skbs;
1456 u16 next_reclaimed, seq_ctl;
1457 bool is_ndp = false;
1459 __skb_queue_head_init(&skbs);
1461 if (iwl_mvm_has_new_tx_api(mvm))
1462 txq_id = le16_to_cpu(tx_resp->tx_queue);
1464 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1466 /* we can free until ssn % q.n_bd not inclusive */
1467 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1469 while (!skb_queue_empty(&skbs)) {
1470 struct sk_buff *skb = __skb_dequeue(&skbs);
1471 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1472 struct ieee80211_hdr *hdr = (void *)skb->data;
1473 bool flushed = false;
1477 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1479 memset(&info->status, 0, sizeof(info->status));
1481 /* inform mac80211 about what happened with the frame */
1482 switch (status & TX_STATUS_MSK) {
1483 case TX_STATUS_SUCCESS:
1484 case TX_STATUS_DIRECT_DONE:
1485 info->flags |= IEEE80211_TX_STAT_ACK;
1487 case TX_STATUS_FAIL_FIFO_FLUSHED:
1488 case TX_STATUS_FAIL_DRAIN_FLOW:
1491 case TX_STATUS_FAIL_DEST_PS:
1492 /* the FW should have stopped the queue and not
1493 * return this status
1496 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1502 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1503 ieee80211_is_mgmt(hdr->frame_control))
1504 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1507 * If we are freeing multiple frames, mark all the frames
1508 * but the first one as acked, since they were acknowledged
1512 info->flags |= IEEE80211_TX_STAT_ACK;
1514 iwl_mvm_tx_status_check_trigger(mvm, status);
1516 info->status.rates[0].count = tx_resp->failure_frame + 1;
1517 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1519 info->status.status_driver_data[1] =
1520 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1522 /* Single frame failure in an AMPDU queue => send BAR */
1523 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1524 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1525 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1526 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1527 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1529 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1530 if (ieee80211_is_back_req(hdr->frame_control))
1532 else if (status != TX_STATUS_SUCCESS)
1533 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1535 if (unlikely(!seq_ctl)) {
1536 struct ieee80211_hdr *hdr = (void *)skb->data;
1539 * If it is an NDP, we can't update next_reclaim since
1540 * its sequence control is 0. Note that for that same
1541 * reason, NDPs are never sent to A-MPDU'able queues
1542 * so that we can never have more than one freed frame
1543 * for a single Tx resonse (see WARN_ON below).
1545 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1550 * TODO: this is not accurate if we are freeing more than one
1553 info->status.tx_time =
1554 le16_to_cpu(tx_resp->wireless_media_time);
1555 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1556 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1557 info->status.status_driver_data[0] =
1558 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1560 ieee80211_tx_status(mvm->hw, skb);
1563 /* This is an aggregation queue or might become one, so we use
1564 * the ssn since: ssn = wifi seq_num % 256.
1565 * The seq_ctl is the sequence control of the packet to which
1566 * this Tx response relates. But if there is a hole in the
1567 * bitmap of the BA we received, this Tx response may allow to
1568 * reclaim the hole and all the subsequent packets that were
1569 * already acked. In that case, seq_ctl != ssn, and the next
1570 * packet to be reclaimed will be ssn and not seq_ctl. In that
1571 * case, several packets will be reclaimed even if
1574 * The ssn is the index (% 256) of the latest packet that has
1575 * treated (acked / dropped) + 1.
1577 next_reclaimed = ssn;
1579 IWL_DEBUG_TX_REPLY(mvm,
1580 "TXQ %d status %s (0x%08x)\n",
1581 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1583 IWL_DEBUG_TX_REPLY(mvm,
1584 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1585 le32_to_cpu(tx_resp->initial_rate),
1586 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1587 ssn, next_reclaimed, seq_ctl);
1591 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1593 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1594 * the firmware while we still have packets for it in the Tx queues.
1596 if (WARN_ON_ONCE(!sta))
1600 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1602 iwl_mvm_tx_airtime(mvm, mvmsta,
1603 le16_to_cpu(tx_resp->wireless_media_time));
1605 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1606 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1607 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1609 if (sta->wme && tid != IWL_MGMT_TID) {
1610 struct iwl_mvm_tid_data *tid_data =
1611 &mvmsta->tid_data[tid];
1612 bool send_eosp_ndp = false;
1614 spin_lock_bh(&mvmsta->lock);
1617 tid_data->next_reclaimed = next_reclaimed;
1618 IWL_DEBUG_TX_REPLY(mvm,
1619 "Next reclaimed packet:%d\n",
1622 IWL_DEBUG_TX_REPLY(mvm,
1623 "NDP - don't update next_reclaimed\n");
1626 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1628 if (mvmsta->sleep_tx_count) {
1629 mvmsta->sleep_tx_count--;
1630 if (mvmsta->sleep_tx_count &&
1631 !iwl_mvm_tid_queued(mvm, tid_data)) {
1633 * The number of frames in the queue
1634 * dropped to 0 even if we sent less
1635 * frames than we thought we had on the
1637 * This means we had holes in the BA
1638 * window that we just filled, ask
1639 * mac80211 to send EOSP since the
1640 * firmware won't know how to do that.
1641 * Send NDP and the firmware will send
1642 * EOSP notification that will trigger
1643 * a call to ieee80211_sta_eosp().
1645 send_eosp_ndp = true;
1649 spin_unlock_bh(&mvmsta->lock);
1650 if (send_eosp_ndp) {
1651 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1652 IEEE80211_FRAME_RELEASE_UAPSD,
1653 1, tid, false, false);
1654 mvmsta->sleep_tx_count = 0;
1655 ieee80211_send_eosp_nullfunc(sta, tid);
1659 if (mvmsta->next_status_eosp) {
1660 mvmsta->next_status_eosp = false;
1661 ieee80211_sta_eosp(sta);
1668 #ifdef CONFIG_IWLWIFI_DEBUG
1669 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1670 static const char *iwl_get_agg_tx_status(u16 status)
1672 switch (status & AGG_TX_STATE_STATUS_MSK) {
1673 AGG_TX_STATE_(TRANSMITTED);
1674 AGG_TX_STATE_(UNDERRUN);
1675 AGG_TX_STATE_(BT_PRIO);
1676 AGG_TX_STATE_(FEW_BYTES);
1677 AGG_TX_STATE_(ABORT);
1678 AGG_TX_STATE_(TX_ON_AIR_DROP);
1679 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1680 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1681 AGG_TX_STATE_(SCD_QUERY);
1682 AGG_TX_STATE_(TEST_BAD_CRC32);
1683 AGG_TX_STATE_(RESPONSE);
1684 AGG_TX_STATE_(DUMP_TX);
1685 AGG_TX_STATE_(DELAY_TX);
1691 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1692 struct iwl_rx_packet *pkt)
1694 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1695 struct agg_tx_status *frame_status =
1696 iwl_mvm_get_agg_status(mvm, tx_resp);
1699 for (i = 0; i < tx_resp->frame_count; i++) {
1700 u16 fstatus = le16_to_cpu(frame_status[i].status);
1702 IWL_DEBUG_TX_REPLY(mvm,
1703 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1704 iwl_get_agg_tx_status(fstatus),
1705 fstatus & AGG_TX_STATE_STATUS_MSK,
1706 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1707 AGG_TX_STATE_TRY_CNT_POS,
1708 le16_to_cpu(frame_status[i].sequence));
1712 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1713 struct iwl_rx_packet *pkt)
1715 #endif /* CONFIG_IWLWIFI_DEBUG */
1717 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1718 struct iwl_rx_packet *pkt)
1720 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1721 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1722 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1723 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1724 struct iwl_mvm_sta *mvmsta;
1725 int queue = SEQ_TO_QUEUE(sequence);
1726 struct ieee80211_sta *sta;
1728 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1729 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1732 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1736 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1738 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1739 if (WARN_ON_ONCE(!sta || !sta->wme)) {
1744 if (!WARN_ON_ONCE(!mvmsta)) {
1745 mvmsta->tid_data[tid].rate_n_flags =
1746 le32_to_cpu(tx_resp->initial_rate);
1747 mvmsta->tid_data[tid].tx_time =
1748 le16_to_cpu(tx_resp->wireless_media_time);
1749 mvmsta->tid_data[tid].lq_color =
1750 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1751 iwl_mvm_tx_airtime(mvm, mvmsta,
1752 le16_to_cpu(tx_resp->wireless_media_time));
1758 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1760 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1761 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1763 if (tx_resp->frame_count == 1)
1764 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1766 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1769 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1771 struct ieee80211_tx_info *ba_info, u32 rate)
1773 struct sk_buff_head reclaimed_skbs;
1774 struct iwl_mvm_tid_data *tid_data;
1775 struct ieee80211_sta *sta;
1776 struct iwl_mvm_sta *mvmsta;
1777 struct sk_buff *skb;
1780 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1781 tid > IWL_MAX_TID_COUNT,
1782 "sta_id %d tid %d", sta_id, tid))
1787 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1789 /* Reclaiming frames for a station that has been deleted ? */
1790 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1795 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1796 tid_data = &mvmsta->tid_data[tid];
1798 if (tid_data->txq_id != txq) {
1800 "invalid BA notification: Q %d, tid %d\n",
1801 tid_data->txq_id, tid);
1806 __skb_queue_head_init(&reclaimed_skbs);
1809 * Release all TFDs before the SSN, i.e. all TFDs in front of
1810 * block-ack window (we assume that they've been successfully
1811 * transmitted ... if not, it's too late anyway).
1813 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1815 spin_lock_bh(&mvmsta->lock);
1817 tid_data->next_reclaimed = index;
1819 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1823 /* pack lq color from tid_data along the reduced txp */
1824 ba_info->status.status_driver_data[0] =
1825 RS_DRV_DATA_PACK(tid_data->lq_color,
1826 ba_info->status.status_driver_data[0]);
1827 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1829 skb_queue_walk(&reclaimed_skbs, skb) {
1830 struct ieee80211_hdr *hdr = (void *)skb->data;
1831 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1833 if (ieee80211_is_data_qos(hdr->frame_control))
1836 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
1838 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1840 memset(&info->status, 0, sizeof(info->status));
1841 /* Packet was transmitted successfully, failures come as single
1842 * frames because before failing a frame the firmware transmits
1843 * it without aggregation at least once.
1845 info->flags |= IEEE80211_TX_STAT_ACK;
1847 /* this is the first skb we deliver in this batch */
1848 /* put the rate scaling data there */
1850 info->flags |= IEEE80211_TX_STAT_AMPDU;
1851 memcpy(&info->status, &ba_info->status,
1852 sizeof(ba_info->status));
1853 iwl_mvm_hwrate_to_tx_status(rate, info);
1857 spin_unlock_bh(&mvmsta->lock);
1859 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1860 * possible (i.e. first MPDU in the aggregation wasn't acked)
1861 * Still it's important to update RS about sent vs. acked.
1863 if (skb_queue_empty(&reclaimed_skbs)) {
1864 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1868 rcu_dereference(mvmsta->vif->chanctx_conf);
1870 if (WARN_ON_ONCE(!chanctx_conf))
1873 ba_info->band = chanctx_conf->def.chan->band;
1874 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1876 if (!iwl_mvm_has_tlc_offload(mvm)) {
1877 IWL_DEBUG_TX_REPLY(mvm,
1878 "No reclaim. Update rs directly\n");
1879 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1886 while (!skb_queue_empty(&reclaimed_skbs)) {
1887 skb = __skb_dequeue(&reclaimed_skbs);
1888 ieee80211_tx_status(mvm->hw, skb);
1892 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1894 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1895 int sta_id, tid, txq, index;
1896 struct ieee80211_tx_info ba_info = {};
1897 struct iwl_mvm_ba_notif *ba_notif;
1898 struct iwl_mvm_tid_data *tid_data;
1899 struct iwl_mvm_sta *mvmsta;
1901 ba_info.flags = IEEE80211_TX_STAT_AMPDU;
1903 if (iwl_mvm_has_new_tx_api(mvm)) {
1904 struct iwl_mvm_compressed_ba_notif *ba_res =
1906 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
1909 sta_id = ba_res->sta_id;
1910 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1911 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1912 ba_info.status.tx_time =
1913 (u16)le32_to_cpu(ba_res->wireless_time);
1914 ba_info.status.status_driver_data[0] =
1915 (void *)(uintptr_t)ba_res->reduced_txp;
1917 if (!le16_to_cpu(ba_res->tfd_cnt))
1922 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1927 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) {
1928 struct iwl_mvm_compressed_ba_tfd *ba_tfd =
1932 if (tid == IWL_MGMT_TID)
1933 tid = IWL_MAX_TID_COUNT;
1935 mvmsta->tid_data[i].lq_color = lq_color;
1936 iwl_mvm_tx_reclaim(mvm, sta_id, tid,
1937 (int)(le16_to_cpu(ba_tfd->q_num)),
1938 le16_to_cpu(ba_tfd->tfd_index),
1940 le32_to_cpu(ba_res->tx_rate));
1943 iwl_mvm_tx_airtime(mvm, mvmsta,
1944 le32_to_cpu(ba_res->wireless_time));
1948 IWL_DEBUG_TX_REPLY(mvm,
1949 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1950 sta_id, le32_to_cpu(ba_res->flags),
1951 le16_to_cpu(ba_res->txed),
1952 le16_to_cpu(ba_res->done));
1956 ba_notif = (void *)pkt->data;
1957 sta_id = ba_notif->sta_id;
1958 tid = ba_notif->tid;
1959 /* "flow" corresponds to Tx queue */
1960 txq = le16_to_cpu(ba_notif->scd_flow);
1961 /* "ssn" is start of block-ack Tx window, corresponds to index
1962 * (in Tx queue's circular buffer) of first TFD/frame in window */
1963 index = le16_to_cpu(ba_notif->scd_ssn);
1966 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1967 if (WARN_ON_ONCE(!mvmsta)) {
1972 tid_data = &mvmsta->tid_data[tid];
1974 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1975 ba_info.status.ampdu_len = ba_notif->txed;
1976 ba_info.status.tx_time = tid_data->tx_time;
1977 ba_info.status.status_driver_data[0] =
1978 (void *)(uintptr_t)ba_notif->reduced_txp;
1982 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1983 tid_data->rate_n_flags);
1985 IWL_DEBUG_TX_REPLY(mvm,
1986 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1987 ba_notif->sta_addr, ba_notif->sta_id);
1989 IWL_DEBUG_TX_REPLY(mvm,
1990 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1991 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1992 le64_to_cpu(ba_notif->bitmap), txq, index,
1993 ba_notif->txed, ba_notif->txed_2_done);
1995 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1996 ba_notif->reduced_txp);
2000 * Note that there are transports that buffer frames before they reach
2001 * the firmware. This means that after flush_tx_path is called, the
2002 * queue might not be empty. The race-free way to handle this is to:
2003 * 1) set the station as draining
2004 * 2) flush the Tx path
2005 * 3) wait for the transport queues to be empty
2007 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
2010 struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2011 .queues_ctl = cpu_to_le32(tfd_msk),
2012 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2015 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2017 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
2018 sizeof(flush_cmd), &flush_cmd);
2020 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2024 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id,
2025 u16 tids, u32 flags)
2028 struct iwl_tx_path_flush_cmd flush_cmd = {
2029 .sta_id = cpu_to_le32(sta_id),
2030 .tid_mask = cpu_to_le16(tids),
2033 WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2035 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
2036 sizeof(flush_cmd), &flush_cmd);
2038 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2042 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags)
2044 struct iwl_mvm_int_sta *int_sta = sta;
2045 struct iwl_mvm_sta *mvm_sta = sta;
2047 BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) !=
2048 offsetof(struct iwl_mvm_sta, sta_id));
2050 if (iwl_mvm_has_new_tx_api(mvm))
2051 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id,
2052 0xff | BIT(IWL_MGMT_TID), flags);
2055 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk,
2058 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags);