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 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 * All rights reserved.
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
43 * * Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * * Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in
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50 * contributors may be used to endorse or promote products derived
51 * from this software without specific prior written permission.
53 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
54 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
55 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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59 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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63 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
65 *****************************************************************************/
66 #include <linux/ieee80211.h>
67 #include <linux/etherdevice.h>
68 #include <linux/tcp.h>
71 #include "iwl-trans.h"
72 #include "iwl-eeprom-parse.h"
78 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
81 struct iwl_fw_dbg_trigger_tlv *trig;
82 struct iwl_fw_dbg_trigger_ba *ba_trig;
84 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
87 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
88 ba_trig = (void *)trig->data;
90 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
93 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
96 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
97 "BAR sent to %pM, tid %d, ssn %d",
102 * Sets most of the Tx cmd's fields
104 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
105 struct iwl_tx_cmd *tx_cmd,
106 struct ieee80211_tx_info *info, u8 sta_id)
108 struct ieee80211_hdr *hdr = (void *)skb->data;
109 __le16 fc = hdr->frame_control;
110 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
111 u32 len = skb->len + FCS_LEN;
114 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
115 tx_flags |= TX_CMD_FLG_ACK;
117 tx_flags &= ~TX_CMD_FLG_ACK;
119 if (ieee80211_is_probe_resp(fc))
120 tx_flags |= TX_CMD_FLG_TSF;
122 if (ieee80211_has_morefrags(fc))
123 tx_flags |= TX_CMD_FLG_MORE_FRAG;
125 if (ieee80211_is_data_qos(fc)) {
126 u8 *qc = ieee80211_get_qos_ctl(hdr);
127 tx_cmd->tid_tspec = qc[0] & 0xf;
128 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
129 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
130 tx_cmd->offload_assist |=
131 cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU));
132 } else if (ieee80211_is_back_req(fc)) {
133 struct ieee80211_bar *bar = (void *)skb->data;
134 u16 control = le16_to_cpu(bar->control);
135 u16 ssn = le16_to_cpu(bar->start_seq_num);
137 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
138 tx_cmd->tid_tspec = (control &
139 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
140 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
141 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
142 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
145 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
146 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
147 tx_flags |= TX_CMD_FLG_SEQ_CTL;
149 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
152 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
153 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
154 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
156 ac = tid_to_mac80211_ac[0];
158 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
159 TX_CMD_FLG_BT_PRIO_POS;
161 if (ieee80211_is_mgmt(fc)) {
162 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
163 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
164 else if (ieee80211_is_action(fc))
165 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
167 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
169 /* The spec allows Action frames in A-MPDU, we don't support
172 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
173 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
174 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
176 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
179 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
180 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
181 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
183 if (fw_has_capa(&mvm->fw->ucode_capa,
184 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
185 ieee80211_action_contains_tpc(skb))
186 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
188 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
189 /* Total # bytes to be transmitted */
190 tx_cmd->len = cpu_to_le16((u16)skb->len +
191 (uintptr_t)info->driver_data[0]);
192 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
193 tx_cmd->sta_id = sta_id;
195 /* padding is inserted later in transport */
196 if (ieee80211_hdrlen(fc) % 4 &&
197 !(tx_cmd->offload_assist & cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU))))
198 tx_cmd->offload_assist |= cpu_to_le16(BIT(TX_CMD_OFFLD_PAD));
202 * Sets the fields in the Tx cmd that are rate related
204 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
205 struct ieee80211_tx_info *info,
206 struct ieee80211_sta *sta, __le16 fc)
212 /* Set retry limit on RTS packets */
213 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
215 /* Set retry limit on DATA packets and Probe Responses*/
216 if (ieee80211_is_probe_resp(fc)) {
217 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
218 tx_cmd->rts_retry_limit =
219 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
220 } else if (ieee80211_is_back_req(fc)) {
221 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
223 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
227 * for data packets, rate info comes from the table inside the fw. This
228 * table is controlled by LINK_QUALITY commands
231 if (ieee80211_is_data(fc) && sta) {
232 tx_cmd->initial_rate_index = 0;
233 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
235 } else if (ieee80211_is_back_req(fc)) {
237 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
240 /* HT rate doesn't make sense for a non data frame */
241 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
242 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n",
243 info->control.rates[0].flags,
244 info->control.rates[0].idx,
247 rate_idx = info->control.rates[0].idx;
248 /* if the rate isn't a well known legacy rate, take the lowest one */
249 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
250 rate_idx = rate_lowest_index(
251 &mvm->nvm_data->bands[info->band], sta);
253 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
254 if (info->band == IEEE80211_BAND_5GHZ)
255 rate_idx += IWL_FIRST_OFDM_RATE;
257 /* For 2.4 GHZ band, check that there is no need to remap */
258 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
260 /* Get PLCP rate for tx_cmd->rate_n_flags */
261 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
263 mvm->mgmt_last_antenna_idx =
264 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
265 mvm->mgmt_last_antenna_idx);
267 if (info->band == IEEE80211_BAND_2GHZ &&
268 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
269 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
272 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
274 /* Set CCK flag as needed */
275 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
276 rate_flags |= RATE_MCS_CCK_MSK;
278 /* Set the rate in the TX cmd */
279 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
283 * Sets the fields in the Tx cmd that are crypto related
285 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
286 struct ieee80211_tx_info *info,
287 struct iwl_tx_cmd *tx_cmd,
288 struct sk_buff *skb_frag,
291 struct ieee80211_key_conf *keyconf = info->control.hw_key;
292 u8 *crypto_hdr = skb_frag->data + hdrlen;
295 switch (keyconf->cipher) {
296 case WLAN_CIPHER_SUITE_CCMP:
297 case WLAN_CIPHER_SUITE_CCMP_256:
298 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
299 pn = atomic64_inc_return(&keyconf->tx_pn);
302 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
303 crypto_hdr[1] = pn >> 8;
304 crypto_hdr[4] = pn >> 16;
305 crypto_hdr[5] = pn >> 24;
306 crypto_hdr[6] = pn >> 32;
307 crypto_hdr[7] = pn >> 40;
310 case WLAN_CIPHER_SUITE_TKIP:
311 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
312 pn = atomic64_inc_return(&keyconf->tx_pn);
313 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
314 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
317 case WLAN_CIPHER_SUITE_WEP104:
318 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
320 case WLAN_CIPHER_SUITE_WEP40:
321 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
322 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
323 TX_CMD_SEC_WEP_KEY_IDX_MSK);
325 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
328 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
333 * Allocates and sets the Tx cmd the driver data pointers in the skb
335 static struct iwl_device_cmd *
336 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
337 int hdrlen, struct ieee80211_sta *sta, u8 sta_id)
339 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
340 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
341 struct iwl_device_cmd *dev_cmd;
342 struct iwl_tx_cmd *tx_cmd;
344 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
346 if (unlikely(!dev_cmd))
349 memset(dev_cmd, 0, sizeof(*dev_cmd));
350 dev_cmd->hdr.cmd = TX_CMD;
351 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
353 if (info->control.hw_key)
354 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
356 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
358 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
360 memset(&info->status, 0, sizeof(info->status));
361 memset(info->driver_data, 0, sizeof(info->driver_data));
363 info->driver_data[1] = dev_cmd;
368 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
370 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
371 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
372 struct iwl_device_cmd *dev_cmd;
373 struct iwl_tx_cmd *tx_cmd;
375 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
377 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU))
380 if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
381 (!info->control.vif ||
382 info->hw_queue != info->control.vif->cab_queue)))
385 /* This holds the amsdu headers length */
386 info->driver_data[0] = (void *)(uintptr_t)0;
389 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
390 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
391 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
392 * and hence needs to be sent on the aux queue
394 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
395 info->control.vif->type == NL80211_IFTYPE_STATION)
396 IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue;
399 * If the interface on which the frame is sent is the P2P_DEVICE
400 * or an AP/GO interface use the broadcast station associated
401 * with it; otherwise if the interface is a managed interface
402 * use the AP station associated with it for multicast traffic
403 * (this is not possible for unicast packets as a TLDS discovery
404 * response are sent without a station entry); otherwise use the
407 sta_id = mvm->aux_sta.sta_id;
408 if (info->control.vif) {
409 struct iwl_mvm_vif *mvmvif =
410 iwl_mvm_vif_from_mac80211(info->control.vif);
412 if (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
413 info->control.vif->type == NL80211_IFTYPE_AP)
414 sta_id = mvmvif->bcast_sta.sta_id;
415 else if (info->control.vif->type == NL80211_IFTYPE_STATION &&
416 is_multicast_ether_addr(hdr->addr1)) {
417 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id);
419 if (ap_sta_id != IWL_MVM_STATION_COUNT)
424 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue);
426 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, hdrlen, NULL, sta_id);
430 /* From now on, we cannot access info->control */
431 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
433 /* Copy MAC header from skb into command buffer */
434 memcpy(tx_cmd->hdr, hdr, hdrlen);
436 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) {
437 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
442 * Increase the pending frames counter, so that later when a reply comes
443 * in and the counter is decreased - we don't start getting negative
445 * Note that we don't need to make sure it isn't agg'd, since we're
448 atomic_inc(&mvm->pending_frames[sta_id]);
454 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
455 struct ieee80211_sta *sta,
456 struct sk_buff_head *mpdus_skb)
458 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
459 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
460 struct ieee80211_hdr *hdr = (void *)skb->data;
461 unsigned int mss = skb_shinfo(skb)->gso_size;
462 struct sk_buff *tmp, *next;
463 char cb[sizeof(skb->cb)];
464 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
465 bool ipv4 = (skb->protocol == htons(ETH_P_IP));
466 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
467 u16 amsdu_add, snap_ip_tcp, pad, i = 0;
468 unsigned int dbg_max_amsdu_len;
471 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
474 qc = ieee80211_get_qos_ctl(hdr);
475 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
476 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
479 if (!sta->max_amsdu_len ||
480 !ieee80211_is_data_qos(hdr->frame_control) ||
481 !mvmsta->tlc_amsdu) {
488 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
489 * during an BA session.
491 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
492 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) {
498 max_amsdu_len = sta->max_amsdu_len;
499 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len);
501 /* the Tx FIFO to which this A-MSDU will be routed */
502 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
505 * Don't send an AMSDU that will be longer than the TXF.
506 * Add a security margin of 256 for the TX command + headers.
507 * We also want to have the start of the next packet inside the
508 * fifo to be able to send bursts.
510 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
511 mvm->shared_mem_cfg.txfifo_size[txf] - 256);
513 if (dbg_max_amsdu_len)
514 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
518 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
519 * supported. This is a spec requirement (IEEE 802.11-2015
520 * section 8.7.3 NOTE 3).
522 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
523 !sta->vht_cap.vht_supported)
524 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
526 /* Sub frame header + SNAP + IP header + TCP header + MSS */
527 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
528 pad = (4 - subf_len) & 0x3;
531 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
532 * N * subf_len + (N - 1) * pad.
534 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
535 if (num_subframes > 1)
536 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
538 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
539 tcp_hdrlen(skb) + skb->data_len;
542 * Make sure we have enough TBs for the A-MSDU:
543 * 2 for each subframe
544 * 1 more for each fragment
545 * 1 more for the potential data in the header
548 min_t(unsigned int, num_subframes,
549 (mvm->trans->max_skb_frags - 1 -
550 skb_shinfo(skb)->nr_frags) / 2);
552 /* This skb fits in one single A-MSDU */
553 if (num_subframes * mss >= tcp_payload_len) {
555 * Compute the length of all the data added for the A-MSDU.
556 * This will be used to compute the length to write in the TX
557 * command. We have: SNAP + IP + TCP for n -1 subframes and
558 * ETH header for n subframes. Note that the original skb
559 * already had one set of SNAP / IP / TCP headers.
561 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss);
562 info = IEEE80211_SKB_CB(skb);
563 amsdu_add = num_subframes * sizeof(struct ethhdr) +
564 (num_subframes - 1) * (snap_ip_tcp + pad);
565 /* This holds the amsdu headers length */
566 info->driver_data[0] = (void *)(uintptr_t)amsdu_add;
568 __skb_queue_tail(mpdus_skb, skb);
573 * Trick the segmentation function to make it
574 * create SKBs that can fit into one A-MSDU.
577 skb_shinfo(skb)->gso_size = num_subframes * mss;
578 memcpy(cb, skb->cb, sizeof(cb));
580 next = skb_gso_segment(skb, NETIF_F_CSUM_MASK | NETIF_F_SG);
581 skb_shinfo(skb)->gso_size = mss;
582 if (WARN_ON_ONCE(IS_ERR(next)))
591 memcpy(tmp->cb, cb, sizeof(tmp->cb));
593 * Compute the length of all the data added for the A-MSDU.
594 * This will be used to compute the length to write in the TX
595 * command. We have: SNAP + IP + TCP for n -1 subframes and
596 * ETH header for n subframes.
598 tcp_payload_len = skb_tail_pointer(tmp) -
599 skb_transport_header(tmp) -
600 tcp_hdrlen(tmp) + tmp->data_len;
603 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
605 if (tcp_payload_len > mss) {
606 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss);
607 info = IEEE80211_SKB_CB(tmp);
608 amsdu_add = num_subframes * sizeof(struct ethhdr) +
609 (num_subframes - 1) * (snap_ip_tcp + pad);
610 info->driver_data[0] = (void *)(uintptr_t)amsdu_add;
611 skb_shinfo(tmp)->gso_size = mss;
613 qc = ieee80211_get_qos_ctl((void *)tmp->data);
616 ip_send_check(ip_hdr(tmp));
617 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
618 skb_shinfo(tmp)->gso_size = 0;
624 __skb_queue_tail(mpdus_skb, tmp);
630 #else /* CONFIG_INET */
631 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
632 struct ieee80211_sta *sta,
633 struct sk_buff_head *mpdus_skb)
635 /* Impossible to get TSO with CONFIG_INET */
643 * Sets the fields in the Tx cmd that are crypto related
645 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
646 struct ieee80211_sta *sta)
648 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
649 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
650 struct iwl_mvm_sta *mvmsta;
651 struct iwl_device_cmd *dev_cmd;
652 struct iwl_tx_cmd *tx_cmd;
655 u8 tid = IWL_MAX_TID_COUNT;
656 u8 txq_id = info->hw_queue;
657 bool is_ampdu = false;
660 mvmsta = iwl_mvm_sta_from_mac80211(sta);
661 fc = hdr->frame_control;
662 hdrlen = ieee80211_hdrlen(fc);
664 if (WARN_ON_ONCE(!mvmsta))
667 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
670 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, hdrlen, sta, mvmsta->sta_id);
674 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
675 /* From now on, we cannot access info->control */
678 * we handle that entirely ourselves -- for uAPSD the firmware
679 * will always send a notification, and for PS-Poll responses
680 * we'll notify mac80211 when getting frame status
682 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
684 spin_lock(&mvmsta->lock);
686 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
688 qc = ieee80211_get_qos_ctl(hdr);
689 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
690 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
691 goto drop_unlock_sta;
693 seq_number = mvmsta->tid_data[tid].seq_number;
694 seq_number &= IEEE80211_SCTL_SEQ;
695 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
696 hdr->seq_ctrl |= cpu_to_le16(seq_number);
697 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
700 /* Copy MAC header from skb into command buffer */
701 memcpy(tx_cmd->hdr, hdr, hdrlen);
703 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
706 /* default to TID 0 for non-QoS packets */
707 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
709 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
713 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
714 goto drop_unlock_sta;
715 txq_id = mvmsta->tid_data[tid].txq_id;
718 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
719 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
721 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
722 goto drop_unlock_sta;
724 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
725 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
727 spin_unlock(&mvmsta->lock);
729 if (txq_id < mvm->first_agg_queue)
730 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
735 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
736 spin_unlock(&mvmsta->lock);
741 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
742 struct ieee80211_sta *sta)
744 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
745 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
746 struct sk_buff_head mpdus_skbs;
747 unsigned int payload_len;
750 if (WARN_ON_ONCE(!mvmsta))
753 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
756 /* This holds the amsdu headers length */
757 info->driver_data[0] = (void *)(uintptr_t)0;
759 if (!skb_is_gso(skb))
760 return iwl_mvm_tx_mpdu(mvm, skb, sta);
762 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
763 tcp_hdrlen(skb) + skb->data_len;
765 if (payload_len <= skb_shinfo(skb)->gso_size)
766 return iwl_mvm_tx_mpdu(mvm, skb, sta);
768 __skb_queue_head_init(&mpdus_skbs);
770 ret = iwl_mvm_tx_tso(mvm, skb, sta, &mpdus_skbs);
774 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
777 while (!skb_queue_empty(&mpdus_skbs)) {
778 skb = __skb_dequeue(&mpdus_skbs);
780 ret = iwl_mvm_tx_mpdu(mvm, skb, sta);
782 __skb_queue_purge(&mpdus_skbs);
790 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
791 struct ieee80211_sta *sta, u8 tid)
793 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
794 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
795 struct ieee80211_vif *vif = mvmsta->vif;
797 lockdep_assert_held(&mvmsta->lock);
799 if ((tid_data->state == IWL_AGG_ON ||
800 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
801 iwl_mvm_tid_queued(tid_data) == 0) {
803 * Now that this aggregation queue is empty tell mac80211 so it
804 * knows we no longer have frames buffered for the station on
805 * this TID (for the TIM bitmap calculation.)
807 ieee80211_sta_set_buffered(sta, tid, false);
810 if (tid_data->ssn != tid_data->next_reclaimed)
813 switch (tid_data->state) {
814 case IWL_EMPTYING_HW_QUEUE_ADDBA:
815 IWL_DEBUG_TX_QUEUES(mvm,
816 "Can continue addBA flow ssn = next_recl = %d\n",
817 tid_data->next_reclaimed);
818 tid_data->state = IWL_AGG_STARTING;
819 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
822 case IWL_EMPTYING_HW_QUEUE_DELBA:
823 IWL_DEBUG_TX_QUEUES(mvm,
824 "Can continue DELBA flow ssn = next_recl = %d\n",
825 tid_data->next_reclaimed);
826 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
827 vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
829 tid_data->state = IWL_AGG_OFF;
830 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
838 #ifdef CONFIG_IWLWIFI_DEBUG
839 const char *iwl_mvm_get_tx_fail_reason(u32 status)
841 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
842 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
844 switch (status & TX_STATUS_MSK) {
845 case TX_STATUS_SUCCESS:
847 TX_STATUS_POSTPONE(DELAY);
848 TX_STATUS_POSTPONE(FEW_BYTES);
849 TX_STATUS_POSTPONE(BT_PRIO);
850 TX_STATUS_POSTPONE(QUIET_PERIOD);
851 TX_STATUS_POSTPONE(CALC_TTAK);
852 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
853 TX_STATUS_FAIL(SHORT_LIMIT);
854 TX_STATUS_FAIL(LONG_LIMIT);
855 TX_STATUS_FAIL(UNDERRUN);
856 TX_STATUS_FAIL(DRAIN_FLOW);
857 TX_STATUS_FAIL(RFKILL_FLUSH);
858 TX_STATUS_FAIL(LIFE_EXPIRE);
859 TX_STATUS_FAIL(DEST_PS);
860 TX_STATUS_FAIL(HOST_ABORTED);
861 TX_STATUS_FAIL(BT_RETRY);
862 TX_STATUS_FAIL(STA_INVALID);
863 TX_STATUS_FAIL(FRAG_DROPPED);
864 TX_STATUS_FAIL(TID_DISABLE);
865 TX_STATUS_FAIL(FIFO_FLUSHED);
866 TX_STATUS_FAIL(SMALL_CF_POLL);
867 TX_STATUS_FAIL(FW_DROP);
868 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
873 #undef TX_STATUS_FAIL
874 #undef TX_STATUS_POSTPONE
876 #endif /* CONFIG_IWLWIFI_DEBUG */
878 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
879 enum ieee80211_band band,
880 struct ieee80211_tx_rate *r)
882 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
883 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
884 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
885 case RATE_MCS_CHAN_WIDTH_20:
887 case RATE_MCS_CHAN_WIDTH_40:
888 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
890 case RATE_MCS_CHAN_WIDTH_80:
891 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
893 case RATE_MCS_CHAN_WIDTH_160:
894 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
897 if (rate_n_flags & RATE_MCS_SGI_MSK)
898 r->flags |= IEEE80211_TX_RC_SHORT_GI;
899 if (rate_n_flags & RATE_MCS_HT_MSK) {
900 r->flags |= IEEE80211_TX_RC_MCS;
901 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
902 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
903 ieee80211_rate_set_vht(
904 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
905 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
906 RATE_VHT_MCS_NSS_POS) + 1);
907 r->flags |= IEEE80211_TX_RC_VHT_MCS;
909 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
915 * translate ucode response to mac80211 tx status control values
917 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
918 struct ieee80211_tx_info *info)
920 struct ieee80211_tx_rate *r = &info->status.rates[0];
922 info->status.antenna =
923 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
924 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
927 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
930 struct iwl_fw_dbg_trigger_tlv *trig;
931 struct iwl_fw_dbg_trigger_tx_status *status_trig;
934 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
937 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
938 status_trig = (void *)trig->data;
940 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
943 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
944 /* don't collect on status 0 */
945 if (!status_trig->statuses[i].status)
948 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
951 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
952 "Tx status %d was received",
953 status & TX_STATUS_MSK);
958 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
959 struct iwl_rx_packet *pkt)
961 struct ieee80211_sta *sta;
962 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
963 int txq_id = SEQ_TO_QUEUE(sequence);
964 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
965 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
966 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
967 u32 status = le16_to_cpu(tx_resp->status.status);
968 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
969 struct iwl_mvm_sta *mvmsta;
970 struct sk_buff_head skbs;
972 u16 next_reclaimed, seq_ctl;
975 __skb_queue_head_init(&skbs);
977 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
979 /* we can free until ssn % q.n_bd not inclusive */
980 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
982 while (!skb_queue_empty(&skbs)) {
983 struct sk_buff *skb = __skb_dequeue(&skbs);
984 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
988 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
990 memset(&info->status, 0, sizeof(info->status));
992 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
994 /* inform mac80211 about what happened with the frame */
995 switch (status & TX_STATUS_MSK) {
996 case TX_STATUS_SUCCESS:
997 case TX_STATUS_DIRECT_DONE:
998 info->flags |= IEEE80211_TX_STAT_ACK;
1000 case TX_STATUS_FAIL_DEST_PS:
1001 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1007 iwl_mvm_tx_status_check_trigger(mvm, status);
1009 info->status.rates[0].count = tx_resp->failure_frame + 1;
1010 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1012 info->status.status_driver_data[1] =
1013 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1015 /* Single frame failure in an AMPDU queue => send BAR */
1016 if (txq_id >= mvm->first_agg_queue &&
1017 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1018 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
1019 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1021 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1022 if (status != TX_STATUS_SUCCESS) {
1023 struct ieee80211_hdr *hdr = (void *)skb->data;
1024 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1027 if (unlikely(!seq_ctl)) {
1028 struct ieee80211_hdr *hdr = (void *)skb->data;
1031 * If it is an NDP, we can't update next_reclaim since
1032 * its sequence control is 0. Note that for that same
1033 * reason, NDPs are never sent to A-MPDU'able queues
1034 * so that we can never have more than one freed frame
1035 * for a single Tx resonse (see WARN_ON below).
1037 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1042 * TODO: this is not accurate if we are freeing more than one
1045 info->status.tx_time =
1046 le16_to_cpu(tx_resp->wireless_media_time);
1047 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1048 info->status.status_driver_data[0] =
1049 (void *)(uintptr_t)tx_resp->reduced_tpc;
1051 ieee80211_tx_status(mvm->hw, skb);
1054 if (txq_id >= mvm->first_agg_queue) {
1055 /* If this is an aggregation queue, we use the ssn since:
1056 * ssn = wifi seq_num % 256.
1057 * The seq_ctl is the sequence control of the packet to which
1058 * this Tx response relates. But if there is a hole in the
1059 * bitmap of the BA we received, this Tx response may allow to
1060 * reclaim the hole and all the subsequent packets that were
1061 * already acked. In that case, seq_ctl != ssn, and the next
1062 * packet to be reclaimed will be ssn and not seq_ctl. In that
1063 * case, several packets will be reclaimed even if
1066 * The ssn is the index (% 256) of the latest packet that has
1067 * treated (acked / dropped) + 1.
1069 next_reclaimed = ssn;
1071 /* The next packet to be reclaimed is the one after this one */
1072 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
1075 IWL_DEBUG_TX_REPLY(mvm,
1076 "TXQ %d status %s (0x%08x)\n",
1077 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1079 IWL_DEBUG_TX_REPLY(mvm,
1080 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1081 le32_to_cpu(tx_resp->initial_rate),
1082 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1083 ssn, next_reclaimed, seq_ctl);
1087 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1089 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1090 * the firmware while we still have packets for it in the Tx queues.
1092 if (WARN_ON_ONCE(!sta))
1096 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1098 if (tid != IWL_TID_NON_QOS) {
1099 struct iwl_mvm_tid_data *tid_data =
1100 &mvmsta->tid_data[tid];
1101 bool send_eosp_ndp = false;
1103 spin_lock_bh(&mvmsta->lock);
1105 tid_data->next_reclaimed = next_reclaimed;
1106 IWL_DEBUG_TX_REPLY(mvm,
1107 "Next reclaimed packet:%d\n",
1110 IWL_DEBUG_TX_REPLY(mvm,
1111 "NDP - don't update next_reclaimed\n");
1114 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1116 if (mvmsta->sleep_tx_count) {
1117 mvmsta->sleep_tx_count--;
1118 if (mvmsta->sleep_tx_count &&
1119 !iwl_mvm_tid_queued(tid_data)) {
1121 * The number of frames in the queue
1122 * dropped to 0 even if we sent less
1123 * frames than we thought we had on the
1125 * This means we had holes in the BA
1126 * window that we just filled, ask
1127 * mac80211 to send EOSP since the
1128 * firmware won't know how to do that.
1129 * Send NDP and the firmware will send
1130 * EOSP notification that will trigger
1131 * a call to ieee80211_sta_eosp().
1133 send_eosp_ndp = true;
1137 spin_unlock_bh(&mvmsta->lock);
1138 if (send_eosp_ndp) {
1139 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1140 IEEE80211_FRAME_RELEASE_UAPSD,
1141 1, tid, false, false);
1142 mvmsta->sleep_tx_count = 0;
1143 ieee80211_send_eosp_nullfunc(sta, tid);
1147 if (mvmsta->next_status_eosp) {
1148 mvmsta->next_status_eosp = false;
1149 ieee80211_sta_eosp(sta);
1156 * If the txq is not an AMPDU queue, there is no chance we freed
1157 * several skbs. Check that out...
1159 if (txq_id >= mvm->first_agg_queue)
1162 /* We can't free more than one frame at once on a shared queue */
1163 WARN_ON(skb_freed > 1);
1165 /* If we have still frames for this STA nothing to do here */
1166 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
1169 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
1172 * If there are no pending frames for this STA and
1173 * the tx to this station is not disabled, notify
1174 * mac80211 that this station can now wake up in its
1176 * If mvmsta is not NULL, sta is valid.
1179 spin_lock_bh(&mvmsta->lock);
1181 if (!mvmsta->disable_tx)
1182 ieee80211_sta_block_awake(mvm->hw, sta, false);
1184 spin_unlock_bh(&mvmsta->lock);
1187 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
1189 * We are draining and this was the last packet - pre_rcu_remove
1190 * has been called already. We might be after the
1191 * synchronize_net already.
1192 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
1194 set_bit(sta_id, mvm->sta_drained);
1195 schedule_work(&mvm->sta_drained_wk);
1202 #ifdef CONFIG_IWLWIFI_DEBUG
1203 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1204 static const char *iwl_get_agg_tx_status(u16 status)
1206 switch (status & AGG_TX_STATE_STATUS_MSK) {
1207 AGG_TX_STATE_(TRANSMITTED);
1208 AGG_TX_STATE_(UNDERRUN);
1209 AGG_TX_STATE_(BT_PRIO);
1210 AGG_TX_STATE_(FEW_BYTES);
1211 AGG_TX_STATE_(ABORT);
1212 AGG_TX_STATE_(LAST_SENT_TTL);
1213 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1214 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1215 AGG_TX_STATE_(SCD_QUERY);
1216 AGG_TX_STATE_(TEST_BAD_CRC32);
1217 AGG_TX_STATE_(RESPONSE);
1218 AGG_TX_STATE_(DUMP_TX);
1219 AGG_TX_STATE_(DELAY_TX);
1225 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1226 struct iwl_rx_packet *pkt)
1228 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1229 struct agg_tx_status *frame_status = &tx_resp->status;
1232 for (i = 0; i < tx_resp->frame_count; i++) {
1233 u16 fstatus = le16_to_cpu(frame_status[i].status);
1235 IWL_DEBUG_TX_REPLY(mvm,
1236 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1237 iwl_get_agg_tx_status(fstatus),
1238 fstatus & AGG_TX_STATE_STATUS_MSK,
1239 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1240 AGG_TX_STATE_TRY_CNT_POS,
1241 le16_to_cpu(frame_status[i].sequence));
1245 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1246 struct iwl_rx_packet *pkt)
1248 #endif /* CONFIG_IWLWIFI_DEBUG */
1250 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1251 struct iwl_rx_packet *pkt)
1253 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1254 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1255 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1256 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1257 struct ieee80211_sta *sta;
1259 if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue))
1262 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1265 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1269 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1271 if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1272 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1273 mvmsta->tid_data[tid].rate_n_flags =
1274 le32_to_cpu(tx_resp->initial_rate);
1275 mvmsta->tid_data[tid].tx_time =
1276 le16_to_cpu(tx_resp->wireless_media_time);
1282 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1284 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1285 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1287 if (tx_resp->frame_count == 1)
1288 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1290 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1293 static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info,
1294 struct iwl_mvm_ba_notif *ba_notif,
1295 struct iwl_mvm_tid_data *tid_data)
1297 info->flags |= IEEE80211_TX_STAT_AMPDU;
1298 info->status.ampdu_ack_len = ba_notif->txed_2_done;
1299 info->status.ampdu_len = ba_notif->txed;
1300 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
1302 /* TODO: not accounted if the whole A-MPDU failed */
1303 info->status.tx_time = tid_data->tx_time;
1304 info->status.status_driver_data[0] =
1305 (void *)(uintptr_t)ba_notif->reduced_txp;
1306 info->status.status_driver_data[1] =
1307 (void *)(uintptr_t)tid_data->rate_n_flags;
1310 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1312 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1313 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
1314 struct sk_buff_head reclaimed_skbs;
1315 struct iwl_mvm_tid_data *tid_data;
1316 struct ieee80211_sta *sta;
1317 struct iwl_mvm_sta *mvmsta;
1318 struct sk_buff *skb;
1319 int sta_id, tid, freed;
1320 /* "flow" corresponds to Tx queue */
1321 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
1322 /* "ssn" is start of block-ack Tx window, corresponds to index
1323 * (in Tx queue's circular buffer) of first TFD/frame in window */
1324 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
1326 sta_id = ba_notif->sta_id;
1327 tid = ba_notif->tid;
1329 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1330 tid >= IWL_MAX_TID_COUNT,
1331 "sta_id %d tid %d", sta_id, tid))
1336 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1338 /* Reclaiming frames for a station that has been deleted ? */
1339 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1344 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1345 tid_data = &mvmsta->tid_data[tid];
1347 if (tid_data->txq_id != scd_flow) {
1349 "invalid BA notification: Q %d, tid %d, flow %d\n",
1350 tid_data->txq_id, tid, scd_flow);
1355 spin_lock_bh(&mvmsta->lock);
1357 __skb_queue_head_init(&reclaimed_skbs);
1360 * Release all TFDs before the SSN, i.e. all TFDs in front of
1361 * block-ack window (we assume that they've been successfully
1362 * transmitted ... if not, it's too late anyway).
1364 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
1367 IWL_DEBUG_TX_REPLY(mvm,
1368 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1369 (u8 *)&ba_notif->sta_addr_lo32,
1371 IWL_DEBUG_TX_REPLY(mvm,
1372 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1373 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1374 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
1375 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
1376 ba_notif->txed_2_done);
1378 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1379 ba_notif->reduced_txp);
1380 tid_data->next_reclaimed = ba_resp_scd_ssn;
1382 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1386 skb_queue_walk(&reclaimed_skbs, skb) {
1387 struct ieee80211_hdr *hdr = (void *)skb->data;
1388 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1390 if (ieee80211_is_data_qos(hdr->frame_control))
1395 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1397 memset(&info->status, 0, sizeof(info->status));
1398 /* Packet was transmitted successfully, failures come as single
1399 * frames because before failing a frame the firmware transmits
1400 * it without aggregation at least once.
1402 info->flags |= IEEE80211_TX_STAT_ACK;
1404 /* this is the first skb we deliver in this batch */
1405 /* put the rate scaling data there */
1407 iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data);
1410 spin_unlock_bh(&mvmsta->lock);
1412 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1413 * possible (i.e. first MPDU in the aggregation wasn't acked)
1414 * Still it's important to update RS about sent vs. acked.
1416 if (skb_queue_empty(&reclaimed_skbs)) {
1417 struct ieee80211_tx_info ba_info = {};
1418 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1422 rcu_dereference(mvmsta->vif->chanctx_conf);
1424 if (WARN_ON_ONCE(!chanctx_conf))
1427 ba_info.band = chanctx_conf->def.chan->band;
1428 iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data);
1430 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1431 iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info);
1437 while (!skb_queue_empty(&reclaimed_skbs)) {
1438 skb = __skb_dequeue(&reclaimed_skbs);
1439 ieee80211_tx_status(mvm->hw, skb);
1444 * Note that there are transports that buffer frames before they reach
1445 * the firmware. This means that after flush_tx_path is called, the
1446 * queue might not be empty. The race-free way to handle this is to:
1447 * 1) set the station as draining
1448 * 2) flush the Tx path
1449 * 3) wait for the transport queues to be empty
1451 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1454 struct iwl_tx_path_flush_cmd flush_cmd = {
1455 .queues_ctl = cpu_to_le32(tfd_msk),
1456 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1459 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1460 sizeof(flush_cmd), &flush_cmd);
1462 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);