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
47 * the documentation and/or other materials provided with the
49 * * Neither the name Intel Corporation nor the names of its
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
56 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
57 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
58 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
59 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
60 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
61 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
62 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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>
72 #include "iwl-trans.h"
73 #include "iwl-eeprom-parse.h"
79 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
82 struct iwl_fw_dbg_trigger_tlv *trig;
83 struct iwl_fw_dbg_trigger_ba *ba_trig;
85 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
88 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
89 ba_trig = (void *)trig->data;
91 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
94 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
97 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
98 "BAR sent to %pM, tid %d, ssn %d",
102 #define OPT_HDR(type, skb, off) \
103 (type *)(skb_network_header(skb) + (off))
105 static void iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
106 struct ieee80211_hdr *hdr,
107 struct ieee80211_tx_info *info,
108 struct iwl_tx_cmd *tx_cmd)
110 #if IS_ENABLED(CONFIG_INET)
111 u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
112 u16 offload_assist = le16_to_cpu(tx_cmd->offload_assist);
116 * Do not compute checksum if already computed or if transport will
119 if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD)
122 /* We do not expect to be requested to csum stuff we do not support */
123 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
124 (skb->protocol != htons(ETH_P_IP) &&
125 skb->protocol != htons(ETH_P_IPV6)),
126 "No support for requested checksum\n")) {
127 skb_checksum_help(skb);
131 if (skb->protocol == htons(ETH_P_IP)) {
132 protocol = ip_hdr(skb)->protocol;
134 #if IS_ENABLED(CONFIG_IPV6)
135 struct ipv6hdr *ipv6h =
136 (struct ipv6hdr *)skb_network_header(skb);
137 unsigned int off = sizeof(*ipv6h);
139 protocol = ipv6h->nexthdr;
140 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
141 struct ipv6_opt_hdr *hp;
143 /* only supported extension headers */
144 if (protocol != NEXTHDR_ROUTING &&
145 protocol != NEXTHDR_HOP &&
146 protocol != NEXTHDR_DEST) {
147 skb_checksum_help(skb);
151 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
152 protocol = hp->nexthdr;
153 off += ipv6_optlen(hp);
155 /* if we get here - protocol now should be TCP/UDP */
159 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
161 skb_checksum_help(skb);
166 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
169 * Set offset to IP header (snap).
170 * We don't support tunneling so no need to take care of inner header.
173 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
175 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
176 if (skb->protocol == htons(ETH_P_IP) &&
177 (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) {
178 ip_hdr(skb)->check = 0;
179 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
182 /* reset UDP/TCP header csum */
183 if (protocol == IPPROTO_TCP)
184 tcp_hdr(skb)->check = 0;
186 udp_hdr(skb)->check = 0;
188 /* mac header len should include IV, size is in words */
189 if (info->control.hw_key)
190 mh_len += info->control.hw_key->iv_len;
192 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
194 tx_cmd->offload_assist = cpu_to_le16(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_tx_info *skb_info = IEEE80211_SKB_CB(skb);
206 struct ieee80211_hdr *hdr = (void *)skb->data;
207 __le16 fc = hdr->frame_control;
208 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
209 u32 len = skb->len + FCS_LEN;
212 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
213 tx_flags |= TX_CMD_FLG_ACK;
215 tx_flags &= ~TX_CMD_FLG_ACK;
217 if (ieee80211_is_probe_resp(fc))
218 tx_flags |= TX_CMD_FLG_TSF;
220 if (ieee80211_has_morefrags(fc))
221 tx_flags |= TX_CMD_FLG_MORE_FRAG;
223 if (ieee80211_is_data_qos(fc)) {
224 u8 *qc = ieee80211_get_qos_ctl(hdr);
225 tx_cmd->tid_tspec = qc[0] & 0xf;
226 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
227 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
228 tx_cmd->offload_assist |=
229 cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU));
230 } else if (ieee80211_is_back_req(fc)) {
231 struct ieee80211_bar *bar = (void *)skb->data;
232 u16 control = le16_to_cpu(bar->control);
233 u16 ssn = le16_to_cpu(bar->start_seq_num);
235 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
236 tx_cmd->tid_tspec = (control &
237 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
238 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
239 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
240 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
243 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
244 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
245 tx_flags |= TX_CMD_FLG_SEQ_CTL;
247 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
250 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
251 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
252 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
254 ac = tid_to_mac80211_ac[0];
256 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
257 TX_CMD_FLG_BT_PRIO_POS;
259 if (ieee80211_is_mgmt(fc)) {
260 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
261 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
262 else if (ieee80211_is_action(fc))
263 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
265 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
267 /* The spec allows Action frames in A-MPDU, we don't support
270 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
271 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
272 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
274 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
277 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
278 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
279 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
281 if (fw_has_capa(&mvm->fw->ucode_capa,
282 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
283 ieee80211_action_contains_tpc(skb))
284 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
286 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
287 /* Total # bytes to be transmitted */
288 tx_cmd->len = cpu_to_le16((u16)skb->len +
289 (uintptr_t)skb_info->driver_data[0]);
290 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
291 tx_cmd->sta_id = sta_id;
293 /* padding is inserted later in transport */
294 if (ieee80211_hdrlen(fc) % 4 &&
295 !(tx_cmd->offload_assist & cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU))))
296 tx_cmd->offload_assist |= cpu_to_le16(BIT(TX_CMD_OFFLD_PAD));
298 iwl_mvm_tx_csum(mvm, skb, hdr, info, tx_cmd);
302 * Sets the fields in the Tx cmd that are rate related
304 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
305 struct ieee80211_tx_info *info,
306 struct ieee80211_sta *sta, __le16 fc)
312 /* Set retry limit on RTS packets */
313 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
315 /* Set retry limit on DATA packets and Probe Responses*/
316 if (ieee80211_is_probe_resp(fc)) {
317 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
318 tx_cmd->rts_retry_limit =
319 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
320 } else if (ieee80211_is_back_req(fc)) {
321 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
323 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
327 * for data packets, rate info comes from the table inside the fw. This
328 * table is controlled by LINK_QUALITY commands
331 if (ieee80211_is_data(fc) && sta) {
332 tx_cmd->initial_rate_index = 0;
333 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
335 } else if (ieee80211_is_back_req(fc)) {
337 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
340 /* HT rate doesn't make sense for a non data frame */
341 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
342 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n",
343 info->control.rates[0].flags,
344 info->control.rates[0].idx,
347 rate_idx = info->control.rates[0].idx;
348 /* if the rate isn't a well known legacy rate, take the lowest one */
349 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
350 rate_idx = rate_lowest_index(
351 &mvm->nvm_data->bands[info->band], sta);
353 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
354 if (info->band == NL80211_BAND_5GHZ)
355 rate_idx += IWL_FIRST_OFDM_RATE;
357 /* For 2.4 GHZ band, check that there is no need to remap */
358 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
360 /* Get PLCP rate for tx_cmd->rate_n_flags */
361 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
363 mvm->mgmt_last_antenna_idx =
364 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
365 mvm->mgmt_last_antenna_idx);
367 if (info->band == NL80211_BAND_2GHZ &&
368 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
369 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
372 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
374 /* Set CCK flag as needed */
375 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
376 rate_flags |= RATE_MCS_CCK_MSK;
378 /* Set the rate in the TX cmd */
379 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
382 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
385 struct ieee80211_key_conf *keyconf = info->control.hw_key;
388 pn = atomic64_inc_return(&keyconf->tx_pn);
391 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
392 crypto_hdr[1] = pn >> 8;
393 crypto_hdr[4] = pn >> 16;
394 crypto_hdr[5] = pn >> 24;
395 crypto_hdr[6] = pn >> 32;
396 crypto_hdr[7] = pn >> 40;
400 * Sets the fields in the Tx cmd that are crypto related
402 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
403 struct ieee80211_tx_info *info,
404 struct iwl_tx_cmd *tx_cmd,
405 struct sk_buff *skb_frag,
408 struct ieee80211_key_conf *keyconf = info->control.hw_key;
409 u8 *crypto_hdr = skb_frag->data + hdrlen;
412 switch (keyconf->cipher) {
413 case WLAN_CIPHER_SUITE_CCMP:
414 case WLAN_CIPHER_SUITE_CCMP_256:
415 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
416 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
419 case WLAN_CIPHER_SUITE_TKIP:
420 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
421 pn = atomic64_inc_return(&keyconf->tx_pn);
422 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
423 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
426 case WLAN_CIPHER_SUITE_WEP104:
427 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
429 case WLAN_CIPHER_SUITE_WEP40:
430 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
431 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
432 TX_CMD_SEC_WEP_KEY_IDX_MSK);
434 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
436 case WLAN_CIPHER_SUITE_GCMP:
437 case WLAN_CIPHER_SUITE_GCMP_256:
438 /* TODO: Taking the key from the table might introduce a race
439 * when PTK rekeying is done, having an old packets with a PN
440 * based on the old key but the message encrypted with a new
442 * Need to handle this.
444 tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TX_CMD_SEC_KEY_FROM_TABLE;
445 tx_cmd->key[0] = keyconf->hw_key_idx;
446 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
449 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
454 * Allocates and sets the Tx cmd the driver data pointers in the skb
456 static struct iwl_device_cmd *
457 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
458 struct ieee80211_tx_info *info, int hdrlen,
459 struct ieee80211_sta *sta, u8 sta_id)
461 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
462 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
463 struct iwl_device_cmd *dev_cmd;
464 struct iwl_tx_cmd *tx_cmd;
466 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
468 if (unlikely(!dev_cmd))
471 memset(dev_cmd, 0, sizeof(*dev_cmd));
472 dev_cmd->hdr.cmd = TX_CMD;
473 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
475 if (info->control.hw_key)
476 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
478 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
480 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
482 memset(&skb_info->status, 0, sizeof(skb_info->status));
483 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
485 skb_info->driver_data[1] = dev_cmd;
490 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
491 struct ieee80211_tx_info *info, __le16 fc)
493 if (!iwl_mvm_is_dqa_supported(mvm))
494 return info->hw_queue;
496 switch (info->control.vif->type) {
497 case NL80211_IFTYPE_AP:
499 * handle legacy hostapd as well, where station may be added
502 if (ieee80211_is_probe_resp(fc) || ieee80211_is_auth(fc))
503 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
504 if (info->hw_queue == info->control.vif->cab_queue)
505 return info->hw_queue;
508 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
509 case NL80211_IFTYPE_P2P_DEVICE:
510 if (ieee80211_is_mgmt(fc))
511 return IWL_MVM_DQA_P2P_DEVICE_QUEUE;
512 if (info->hw_queue == info->control.vif->cab_queue)
513 return info->hw_queue;
516 return IWL_MVM_DQA_P2P_DEVICE_QUEUE;
518 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
523 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
525 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
526 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
527 struct ieee80211_tx_info info;
528 struct iwl_device_cmd *dev_cmd;
529 struct iwl_tx_cmd *tx_cmd;
531 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
534 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
535 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
536 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
537 * and hence needs to be sent on the aux queue
539 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
540 skb_info->control.vif->type == NL80211_IFTYPE_STATION)
541 IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue;
543 memcpy(&info, skb->cb, sizeof(info));
545 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
548 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
549 (!info.control.vif ||
550 info.hw_queue != info.control.vif->cab_queue)))
553 /* This holds the amsdu headers length */
554 skb_info->driver_data[0] = (void *)(uintptr_t)0;
556 queue = info.hw_queue;
559 * If the interface on which the frame is sent is the P2P_DEVICE
560 * or an AP/GO interface use the broadcast station associated
561 * with it; otherwise if the interface is a managed interface
562 * use the AP station associated with it for multicast traffic
563 * (this is not possible for unicast packets as a TLDS discovery
564 * response are sent without a station entry); otherwise use the
566 * In DQA mode, if vif is of type STATION and frames are not multicast,
567 * they should be sent from the BSS queue. For example, TDLS setup
568 * frames should be sent on this queue, as they go through the AP.
570 sta_id = mvm->aux_sta.sta_id;
571 if (info.control.vif) {
572 struct iwl_mvm_vif *mvmvif =
573 iwl_mvm_vif_from_mac80211(info.control.vif);
575 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
576 info.control.vif->type == NL80211_IFTYPE_AP) {
577 sta_id = mvmvif->bcast_sta.sta_id;
578 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info,
583 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
584 is_multicast_ether_addr(hdr->addr1)) {
585 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id);
587 if (ap_sta_id != IWL_MVM_STATION_COUNT)
589 } else if (iwl_mvm_is_dqa_supported(mvm) &&
590 info.control.vif->type == NL80211_IFTYPE_STATION) {
591 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
595 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
597 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
601 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
603 /* Copy MAC header from skb into command buffer */
604 memcpy(tx_cmd->hdr, hdr, hdrlen);
606 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
607 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
612 * Increase the pending frames counter, so that later when a reply comes
613 * in and the counter is decreased - we don't start getting negative
615 * Note that we don't need to make sure it isn't agg'd, since we're
618 atomic_inc(&mvm->pending_frames[sta_id]);
624 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
625 struct ieee80211_tx_info *info,
626 struct ieee80211_sta *sta,
627 struct sk_buff_head *mpdus_skb)
629 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
630 struct ieee80211_hdr *hdr = (void *)skb->data;
631 unsigned int mss = skb_shinfo(skb)->gso_size;
632 struct sk_buff *tmp, *next;
633 char cb[sizeof(skb->cb)];
634 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
635 bool ipv4 = (skb->protocol == htons(ETH_P_IP));
636 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
637 u16 amsdu_add, snap_ip_tcp, pad, i = 0;
638 unsigned int dbg_max_amsdu_len;
639 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG;
642 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
645 qc = ieee80211_get_qos_ctl(hdr);
646 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
647 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
650 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len);
652 if (!sta->max_amsdu_len ||
653 !ieee80211_is_data_qos(hdr->frame_control) ||
654 (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) {
661 * Do not build AMSDU for IPv6 with extension headers.
662 * ask stack to segment and checkum the generated MPDUs for us.
664 if (skb->protocol == htons(ETH_P_IPV6) &&
665 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
669 netdev_features &= ~NETIF_F_CSUM_MASK;
674 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
675 * during an BA session.
677 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
678 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) {
684 max_amsdu_len = sta->max_amsdu_len;
686 /* the Tx FIFO to which this A-MSDU will be routed */
687 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
690 * Don't send an AMSDU that will be longer than the TXF.
691 * Add a security margin of 256 for the TX command + headers.
692 * We also want to have the start of the next packet inside the
693 * fifo to be able to send bursts.
695 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
696 mvm->shared_mem_cfg.txfifo_size[txf] - 256);
698 if (unlikely(dbg_max_amsdu_len))
699 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
703 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
704 * supported. This is a spec requirement (IEEE 802.11-2015
705 * section 8.7.3 NOTE 3).
707 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
708 !sta->vht_cap.vht_supported)
709 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
711 /* Sub frame header + SNAP + IP header + TCP header + MSS */
712 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
713 pad = (4 - subf_len) & 0x3;
716 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
717 * N * subf_len + (N - 1) * pad.
719 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
720 if (num_subframes > 1)
721 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
723 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
724 tcp_hdrlen(skb) + skb->data_len;
727 * Make sure we have enough TBs for the A-MSDU:
728 * 2 for each subframe
729 * 1 more for each fragment
730 * 1 more for the potential data in the header
733 min_t(unsigned int, num_subframes,
734 (mvm->trans->max_skb_frags - 1 -
735 skb_shinfo(skb)->nr_frags) / 2);
737 /* This skb fits in one single A-MSDU */
738 if (num_subframes * mss >= tcp_payload_len) {
739 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
742 * Compute the length of all the data added for the A-MSDU.
743 * This will be used to compute the length to write in the TX
744 * command. We have: SNAP + IP + TCP for n -1 subframes and
745 * ETH header for n subframes. Note that the original skb
746 * already had one set of SNAP / IP / TCP headers.
748 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss);
749 amsdu_add = num_subframes * sizeof(struct ethhdr) +
750 (num_subframes - 1) * (snap_ip_tcp + pad);
751 /* This holds the amsdu headers length */
752 skb_info->driver_data[0] = (void *)(uintptr_t)amsdu_add;
754 __skb_queue_tail(mpdus_skb, skb);
759 * Trick the segmentation function to make it
760 * create SKBs that can fit into one A-MSDU.
763 skb_shinfo(skb)->gso_size = num_subframes * mss;
764 memcpy(cb, skb->cb, sizeof(cb));
766 next = skb_gso_segment(skb, netdev_features);
767 skb_shinfo(skb)->gso_size = mss;
768 if (WARN_ON_ONCE(IS_ERR(next)))
777 memcpy(tmp->cb, cb, sizeof(tmp->cb));
779 * Compute the length of all the data added for the A-MSDU.
780 * This will be used to compute the length to write in the TX
781 * command. We have: SNAP + IP + TCP for n -1 subframes and
782 * ETH header for n subframes.
784 tcp_payload_len = skb_tail_pointer(tmp) -
785 skb_transport_header(tmp) -
786 tcp_hdrlen(tmp) + tmp->data_len;
789 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
791 if (tcp_payload_len > mss) {
792 struct ieee80211_tx_info *skb_info =
793 IEEE80211_SKB_CB(tmp);
795 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss);
796 amsdu_add = num_subframes * sizeof(struct ethhdr) +
797 (num_subframes - 1) * (snap_ip_tcp + pad);
798 skb_info->driver_data[0] =
799 (void *)(uintptr_t)amsdu_add;
800 skb_shinfo(tmp)->gso_size = mss;
802 qc = ieee80211_get_qos_ctl((void *)tmp->data);
805 ip_send_check(ip_hdr(tmp));
806 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
807 skb_shinfo(tmp)->gso_size = 0;
813 __skb_queue_tail(mpdus_skb, tmp);
819 #else /* CONFIG_INET */
820 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
821 struct ieee80211_tx_info *info,
822 struct ieee80211_sta *sta,
823 struct sk_buff_head *mpdus_skb)
825 /* Impossible to get TSO with CONFIG_INET */
832 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
833 struct iwl_mvm_sta *mvm_sta, u8 tid,
836 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
837 u8 mac_queue = info->hw_queue;
838 struct sk_buff_head *deferred_tx_frames;
840 lockdep_assert_held(&mvm_sta->lock);
842 mvm_sta->deferred_traffic_tid_map |= BIT(tid);
843 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);
845 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;
847 skb_queue_tail(deferred_tx_frames, skb);
850 * The first deferred frame should've stopped the MAC queues, so we
851 * should never get a second deferred frame for the RA/TID.
853 if (!WARN(skb_queue_len(deferred_tx_frames) != 1,
854 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid,
855 skb_queue_len(deferred_tx_frames))) {
856 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
857 schedule_work(&mvm->add_stream_wk);
861 /* Check if there are any timed-out TIDs on a given shared TXQ */
862 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
864 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
865 unsigned long now = jiffies;
868 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
869 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
870 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
878 * Sets the fields in the Tx cmd that are crypto related
880 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
881 struct ieee80211_tx_info *info,
882 struct ieee80211_sta *sta)
884 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
885 struct iwl_mvm_sta *mvmsta;
886 struct iwl_device_cmd *dev_cmd;
887 struct iwl_tx_cmd *tx_cmd;
890 u8 tid = IWL_MAX_TID_COUNT;
891 u8 txq_id = info->hw_queue;
892 bool is_ampdu = false;
895 mvmsta = iwl_mvm_sta_from_mac80211(sta);
896 fc = hdr->frame_control;
897 hdrlen = ieee80211_hdrlen(fc);
899 if (WARN_ON_ONCE(!mvmsta))
902 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
905 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
906 sta, mvmsta->sta_id);
910 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
911 /* From now on, we cannot access info->control */
914 * we handle that entirely ourselves -- for uAPSD the firmware
915 * will always send a notification, and for PS-Poll responses
916 * we'll notify mac80211 when getting frame status
918 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
920 spin_lock(&mvmsta->lock);
922 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
924 qc = ieee80211_get_qos_ctl(hdr);
925 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
926 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
927 goto drop_unlock_sta;
929 seq_number = mvmsta->tid_data[tid].seq_number;
930 seq_number &= IEEE80211_SCTL_SEQ;
931 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
932 hdr->seq_ctrl |= cpu_to_le16(seq_number);
933 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
934 } else if (iwl_mvm_is_dqa_supported(mvm) &&
935 (ieee80211_is_qos_nullfunc(fc) ||
936 ieee80211_is_nullfunc(fc))) {
938 * nullfunc frames should go to the MGMT queue regardless of QOS
940 tid = IWL_MAX_TID_COUNT;
943 if (iwl_mvm_is_dqa_supported(mvm)) {
944 txq_id = mvmsta->tid_data[tid].txq_id;
946 if (ieee80211_is_mgmt(fc))
947 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
950 /* Copy MAC header from skb into command buffer */
951 memcpy(tx_cmd->hdr, hdr, hdrlen);
953 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
955 if (sta->tdls && !iwl_mvm_is_dqa_supported(mvm)) {
956 /* default to TID 0 for non-QoS packets */
957 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
959 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
963 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
964 goto drop_unlock_sta;
965 txq_id = mvmsta->tid_data[tid].txq_id;
968 /* Check if TXQ needs to be allocated or re-activated */
969 if (unlikely(txq_id == IEEE80211_INVAL_HW_QUEUE ||
970 !mvmsta->tid_data[tid].is_tid_active) &&
971 iwl_mvm_is_dqa_supported(mvm)) {
972 /* If TXQ needs to be allocated... */
973 if (txq_id == IEEE80211_INVAL_HW_QUEUE) {
974 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);
977 * The frame is now deferred, and the worker scheduled
978 * will re-allocate it, so we can free it for now.
980 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
981 spin_unlock(&mvmsta->lock);
985 /* If we are here - TXQ exists and needs to be re-activated */
986 spin_lock(&mvm->queue_info_lock);
987 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
988 mvmsta->tid_data[tid].is_tid_active = true;
989 spin_unlock(&mvm->queue_info_lock);
991 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n",
995 if (iwl_mvm_is_dqa_supported(mvm)) {
996 /* Keep track of the time of the last frame for this RA/TID */
997 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1000 * If we have timed-out TIDs - schedule the worker that will
1001 * reconfig the queues and update them
1003 * Note that the mvm->queue_info_lock isn't being taken here in
1004 * order to not serialize the TX flow. This isn't dangerous
1005 * because scheduling mvm->add_stream_wk can't ruin the state,
1006 * and if we DON'T schedule it due to some race condition then
1007 * next TX we get here we will.
1009 if (unlikely(mvm->queue_info[txq_id].status ==
1010 IWL_MVM_QUEUE_SHARED &&
1011 iwl_mvm_txq_should_update(mvm, txq_id)))
1012 schedule_work(&mvm->add_stream_wk);
1015 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
1016 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
1018 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1019 goto drop_unlock_sta;
1021 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1022 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1024 spin_unlock(&mvmsta->lock);
1026 /* Increase pending frames count if this isn't AMPDU */
1028 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
1033 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1034 spin_unlock(&mvmsta->lock);
1039 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
1040 struct ieee80211_sta *sta)
1042 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1043 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
1044 struct ieee80211_tx_info info;
1045 struct sk_buff_head mpdus_skbs;
1046 unsigned int payload_len;
1049 if (WARN_ON_ONCE(!mvmsta))
1052 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1055 memcpy(&info, skb->cb, sizeof(info));
1057 /* This holds the amsdu headers length */
1058 skb_info->driver_data[0] = (void *)(uintptr_t)0;
1060 if (!skb_is_gso(skb))
1061 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1063 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1064 tcp_hdrlen(skb) + skb->data_len;
1066 if (payload_len <= skb_shinfo(skb)->gso_size)
1067 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1069 __skb_queue_head_init(&mpdus_skbs);
1071 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1075 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1078 while (!skb_queue_empty(&mpdus_skbs)) {
1079 skb = __skb_dequeue(&mpdus_skbs);
1081 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1083 __skb_queue_purge(&mpdus_skbs);
1091 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1092 struct ieee80211_sta *sta, u8 tid)
1094 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1095 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1096 struct ieee80211_vif *vif = mvmsta->vif;
1098 lockdep_assert_held(&mvmsta->lock);
1100 if ((tid_data->state == IWL_AGG_ON ||
1101 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1102 iwl_mvm_tid_queued(tid_data) == 0) {
1104 * Now that this aggregation queue is empty tell mac80211 so it
1105 * knows we no longer have frames buffered for the station on
1106 * this TID (for the TIM bitmap calculation.)
1108 ieee80211_sta_set_buffered(sta, tid, false);
1111 if (tid_data->ssn != tid_data->next_reclaimed)
1114 switch (tid_data->state) {
1115 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1116 IWL_DEBUG_TX_QUEUES(mvm,
1117 "Can continue addBA flow ssn = next_recl = %d\n",
1118 tid_data->next_reclaimed);
1119 tid_data->state = IWL_AGG_STARTING;
1120 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1123 case IWL_EMPTYING_HW_QUEUE_DELBA:
1124 IWL_DEBUG_TX_QUEUES(mvm,
1125 "Can continue DELBA flow ssn = next_recl = %d\n",
1126 tid_data->next_reclaimed);
1127 if (!iwl_mvm_is_dqa_supported(mvm)) {
1128 u8 mac80211_ac = tid_to_mac80211_ac[tid];
1130 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
1131 vif->hw_queue[mac80211_ac], tid,
1134 tid_data->state = IWL_AGG_OFF;
1135 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1143 #ifdef CONFIG_IWLWIFI_DEBUG
1144 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1146 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1147 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1149 switch (status & TX_STATUS_MSK) {
1150 case TX_STATUS_SUCCESS:
1152 TX_STATUS_POSTPONE(DELAY);
1153 TX_STATUS_POSTPONE(FEW_BYTES);
1154 TX_STATUS_POSTPONE(BT_PRIO);
1155 TX_STATUS_POSTPONE(QUIET_PERIOD);
1156 TX_STATUS_POSTPONE(CALC_TTAK);
1157 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1158 TX_STATUS_FAIL(SHORT_LIMIT);
1159 TX_STATUS_FAIL(LONG_LIMIT);
1160 TX_STATUS_FAIL(UNDERRUN);
1161 TX_STATUS_FAIL(DRAIN_FLOW);
1162 TX_STATUS_FAIL(RFKILL_FLUSH);
1163 TX_STATUS_FAIL(LIFE_EXPIRE);
1164 TX_STATUS_FAIL(DEST_PS);
1165 TX_STATUS_FAIL(HOST_ABORTED);
1166 TX_STATUS_FAIL(BT_RETRY);
1167 TX_STATUS_FAIL(STA_INVALID);
1168 TX_STATUS_FAIL(FRAG_DROPPED);
1169 TX_STATUS_FAIL(TID_DISABLE);
1170 TX_STATUS_FAIL(FIFO_FLUSHED);
1171 TX_STATUS_FAIL(SMALL_CF_POLL);
1172 TX_STATUS_FAIL(FW_DROP);
1173 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1178 #undef TX_STATUS_FAIL
1179 #undef TX_STATUS_POSTPONE
1181 #endif /* CONFIG_IWLWIFI_DEBUG */
1183 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1184 enum nl80211_band band,
1185 struct ieee80211_tx_rate *r)
1187 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1188 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1189 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1190 case RATE_MCS_CHAN_WIDTH_20:
1192 case RATE_MCS_CHAN_WIDTH_40:
1193 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1195 case RATE_MCS_CHAN_WIDTH_80:
1196 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1198 case RATE_MCS_CHAN_WIDTH_160:
1199 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1202 if (rate_n_flags & RATE_MCS_SGI_MSK)
1203 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1204 if (rate_n_flags & RATE_MCS_HT_MSK) {
1205 r->flags |= IEEE80211_TX_RC_MCS;
1206 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1207 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1208 ieee80211_rate_set_vht(
1209 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1210 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1211 RATE_VHT_MCS_NSS_POS) + 1);
1212 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1214 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1220 * translate ucode response to mac80211 tx status control values
1222 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1223 struct ieee80211_tx_info *info)
1225 struct ieee80211_tx_rate *r = &info->status.rates[0];
1227 info->status.antenna =
1228 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1229 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1232 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1235 struct iwl_fw_dbg_trigger_tlv *trig;
1236 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1239 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
1242 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
1243 status_trig = (void *)trig->data;
1245 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
1248 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1249 /* don't collect on status 0 */
1250 if (!status_trig->statuses[i].status)
1253 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1256 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
1257 "Tx status %d was received",
1258 status & TX_STATUS_MSK);
1263 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1264 struct iwl_rx_packet *pkt)
1266 struct ieee80211_sta *sta;
1267 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1268 int txq_id = SEQ_TO_QUEUE(sequence);
1269 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1270 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1271 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1272 u32 status = le16_to_cpu(tx_resp->status.status);
1273 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
1274 struct iwl_mvm_sta *mvmsta;
1275 struct sk_buff_head skbs;
1277 u16 next_reclaimed, seq_ctl;
1278 bool is_ndp = false;
1279 bool txq_agg = false; /* Is this TXQ aggregated */
1281 __skb_queue_head_init(&skbs);
1283 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1285 /* we can free until ssn % q.n_bd not inclusive */
1286 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1288 while (!skb_queue_empty(&skbs)) {
1289 struct sk_buff *skb = __skb_dequeue(&skbs);
1290 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1294 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1296 memset(&info->status, 0, sizeof(info->status));
1298 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1300 /* inform mac80211 about what happened with the frame */
1301 switch (status & TX_STATUS_MSK) {
1302 case TX_STATUS_SUCCESS:
1303 case TX_STATUS_DIRECT_DONE:
1304 info->flags |= IEEE80211_TX_STAT_ACK;
1306 case TX_STATUS_FAIL_DEST_PS:
1307 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1313 iwl_mvm_tx_status_check_trigger(mvm, status);
1315 info->status.rates[0].count = tx_resp->failure_frame + 1;
1316 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1318 info->status.status_driver_data[1] =
1319 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1321 /* Single frame failure in an AMPDU queue => send BAR */
1322 if (txq_id >= mvm->first_agg_queue &&
1323 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1324 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
1325 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1327 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1328 if (status != TX_STATUS_SUCCESS) {
1329 struct ieee80211_hdr *hdr = (void *)skb->data;
1330 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1333 if (unlikely(!seq_ctl)) {
1334 struct ieee80211_hdr *hdr = (void *)skb->data;
1337 * If it is an NDP, we can't update next_reclaim since
1338 * its sequence control is 0. Note that for that same
1339 * reason, NDPs are never sent to A-MPDU'able queues
1340 * so that we can never have more than one freed frame
1341 * for a single Tx resonse (see WARN_ON below).
1343 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1348 * TODO: this is not accurate if we are freeing more than one
1351 info->status.tx_time =
1352 le16_to_cpu(tx_resp->wireless_media_time);
1353 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1354 info->status.status_driver_data[0] =
1355 (void *)(uintptr_t)tx_resp->reduced_tpc;
1357 ieee80211_tx_status(mvm->hw, skb);
1360 if (txq_id >= mvm->first_agg_queue) {
1361 /* If this is an aggregation queue, we use the ssn since:
1362 * ssn = wifi seq_num % 256.
1363 * The seq_ctl is the sequence control of the packet to which
1364 * this Tx response relates. But if there is a hole in the
1365 * bitmap of the BA we received, this Tx response may allow to
1366 * reclaim the hole and all the subsequent packets that were
1367 * already acked. In that case, seq_ctl != ssn, and the next
1368 * packet to be reclaimed will be ssn and not seq_ctl. In that
1369 * case, several packets will be reclaimed even if
1372 * The ssn is the index (% 256) of the latest packet that has
1373 * treated (acked / dropped) + 1.
1375 next_reclaimed = ssn;
1377 /* The next packet to be reclaimed is the one after this one */
1378 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
1381 IWL_DEBUG_TX_REPLY(mvm,
1382 "TXQ %d status %s (0x%08x)\n",
1383 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1385 IWL_DEBUG_TX_REPLY(mvm,
1386 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1387 le32_to_cpu(tx_resp->initial_rate),
1388 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1389 ssn, next_reclaimed, seq_ctl);
1393 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1395 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1396 * the firmware while we still have packets for it in the Tx queues.
1398 if (WARN_ON_ONCE(!sta))
1402 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1404 if (tid != IWL_TID_NON_QOS) {
1405 struct iwl_mvm_tid_data *tid_data =
1406 &mvmsta->tid_data[tid];
1407 bool send_eosp_ndp = false;
1409 spin_lock_bh(&mvmsta->lock);
1410 if (iwl_mvm_is_dqa_supported(mvm)) {
1411 enum iwl_mvm_agg_state state;
1413 state = mvmsta->tid_data[tid].state;
1414 txq_agg = (state == IWL_AGG_ON ||
1415 state == IWL_EMPTYING_HW_QUEUE_DELBA);
1417 txq_agg = txq_id >= mvm->first_agg_queue;
1421 tid_data->next_reclaimed = next_reclaimed;
1422 IWL_DEBUG_TX_REPLY(mvm,
1423 "Next reclaimed packet:%d\n",
1426 IWL_DEBUG_TX_REPLY(mvm,
1427 "NDP - don't update next_reclaimed\n");
1430 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1432 if (mvmsta->sleep_tx_count) {
1433 mvmsta->sleep_tx_count--;
1434 if (mvmsta->sleep_tx_count &&
1435 !iwl_mvm_tid_queued(tid_data)) {
1437 * The number of frames in the queue
1438 * dropped to 0 even if we sent less
1439 * frames than we thought we had on the
1441 * This means we had holes in the BA
1442 * window that we just filled, ask
1443 * mac80211 to send EOSP since the
1444 * firmware won't know how to do that.
1445 * Send NDP and the firmware will send
1446 * EOSP notification that will trigger
1447 * a call to ieee80211_sta_eosp().
1449 send_eosp_ndp = true;
1453 spin_unlock_bh(&mvmsta->lock);
1454 if (send_eosp_ndp) {
1455 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1456 IEEE80211_FRAME_RELEASE_UAPSD,
1457 1, tid, false, false);
1458 mvmsta->sleep_tx_count = 0;
1459 ieee80211_send_eosp_nullfunc(sta, tid);
1463 if (mvmsta->next_status_eosp) {
1464 mvmsta->next_status_eosp = false;
1465 ieee80211_sta_eosp(sta);
1472 * If the txq is not an AMPDU queue, there is no chance we freed
1473 * several skbs. Check that out...
1478 /* We can't free more than one frame at once on a shared queue */
1479 WARN_ON(!iwl_mvm_is_dqa_supported(mvm) && (skb_freed > 1));
1481 /* If we have still frames for this STA nothing to do here */
1482 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
1485 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
1488 * If there are no pending frames for this STA and
1489 * the tx to this station is not disabled, notify
1490 * mac80211 that this station can now wake up in its
1492 * If mvmsta is not NULL, sta is valid.
1495 spin_lock_bh(&mvmsta->lock);
1497 if (!mvmsta->disable_tx)
1498 ieee80211_sta_block_awake(mvm->hw, sta, false);
1500 spin_unlock_bh(&mvmsta->lock);
1503 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
1505 * We are draining and this was the last packet - pre_rcu_remove
1506 * has been called already. We might be after the
1507 * synchronize_net already.
1508 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
1510 set_bit(sta_id, mvm->sta_drained);
1511 schedule_work(&mvm->sta_drained_wk);
1518 #ifdef CONFIG_IWLWIFI_DEBUG
1519 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1520 static const char *iwl_get_agg_tx_status(u16 status)
1522 switch (status & AGG_TX_STATE_STATUS_MSK) {
1523 AGG_TX_STATE_(TRANSMITTED);
1524 AGG_TX_STATE_(UNDERRUN);
1525 AGG_TX_STATE_(BT_PRIO);
1526 AGG_TX_STATE_(FEW_BYTES);
1527 AGG_TX_STATE_(ABORT);
1528 AGG_TX_STATE_(LAST_SENT_TTL);
1529 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1530 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1531 AGG_TX_STATE_(SCD_QUERY);
1532 AGG_TX_STATE_(TEST_BAD_CRC32);
1533 AGG_TX_STATE_(RESPONSE);
1534 AGG_TX_STATE_(DUMP_TX);
1535 AGG_TX_STATE_(DELAY_TX);
1541 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1542 struct iwl_rx_packet *pkt)
1544 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1545 struct agg_tx_status *frame_status = &tx_resp->status;
1548 for (i = 0; i < tx_resp->frame_count; i++) {
1549 u16 fstatus = le16_to_cpu(frame_status[i].status);
1551 IWL_DEBUG_TX_REPLY(mvm,
1552 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1553 iwl_get_agg_tx_status(fstatus),
1554 fstatus & AGG_TX_STATE_STATUS_MSK,
1555 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1556 AGG_TX_STATE_TRY_CNT_POS,
1557 le16_to_cpu(frame_status[i].sequence));
1561 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1562 struct iwl_rx_packet *pkt)
1564 #endif /* CONFIG_IWLWIFI_DEBUG */
1566 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1567 struct iwl_rx_packet *pkt)
1569 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1570 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1571 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1572 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1573 struct iwl_mvm_sta *mvmsta;
1574 int queue = SEQ_TO_QUEUE(sequence);
1576 if (WARN_ON_ONCE(queue < mvm->first_agg_queue &&
1577 (!iwl_mvm_is_dqa_supported(mvm) ||
1578 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))))
1581 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1584 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1588 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1590 if (!WARN_ON_ONCE(!mvmsta)) {
1591 mvmsta->tid_data[tid].rate_n_flags =
1592 le32_to_cpu(tx_resp->initial_rate);
1593 mvmsta->tid_data[tid].tx_time =
1594 le16_to_cpu(tx_resp->wireless_media_time);
1600 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1602 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1603 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1605 if (tx_resp->frame_count == 1)
1606 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1608 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1611 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1613 struct ieee80211_tx_info *ba_info, u32 rate)
1615 struct sk_buff_head reclaimed_skbs;
1616 struct iwl_mvm_tid_data *tid_data;
1617 struct ieee80211_sta *sta;
1618 struct iwl_mvm_sta *mvmsta;
1619 struct sk_buff *skb;
1622 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1623 tid >= IWL_MAX_TID_COUNT,
1624 "sta_id %d tid %d", sta_id, tid))
1629 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1631 /* Reclaiming frames for a station that has been deleted ? */
1632 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1637 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1638 tid_data = &mvmsta->tid_data[tid];
1640 if (tid_data->txq_id != txq) {
1642 "invalid BA notification: Q %d, tid %d\n",
1643 tid_data->txq_id, tid);
1648 spin_lock_bh(&mvmsta->lock);
1650 __skb_queue_head_init(&reclaimed_skbs);
1653 * Release all TFDs before the SSN, i.e. all TFDs in front of
1654 * block-ack window (we assume that they've been successfully
1655 * transmitted ... if not, it's too late anyway).
1657 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1659 tid_data->next_reclaimed = index;
1661 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1664 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1666 skb_queue_walk(&reclaimed_skbs, skb) {
1667 struct ieee80211_hdr *hdr = (void *)skb->data;
1668 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1670 if (ieee80211_is_data_qos(hdr->frame_control))
1675 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1677 memset(&info->status, 0, sizeof(info->status));
1678 /* Packet was transmitted successfully, failures come as single
1679 * frames because before failing a frame the firmware transmits
1680 * it without aggregation at least once.
1682 info->flags |= IEEE80211_TX_STAT_ACK;
1684 /* this is the first skb we deliver in this batch */
1685 /* put the rate scaling data there */
1687 info->flags |= IEEE80211_TX_STAT_AMPDU;
1688 memcpy(&info->status, &ba_info->status,
1689 sizeof(ba_info->status));
1690 iwl_mvm_hwrate_to_tx_status(rate, info);
1694 spin_unlock_bh(&mvmsta->lock);
1696 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1697 * possible (i.e. first MPDU in the aggregation wasn't acked)
1698 * Still it's important to update RS about sent vs. acked.
1700 if (skb_queue_empty(&reclaimed_skbs)) {
1701 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1705 rcu_dereference(mvmsta->vif->chanctx_conf);
1707 if (WARN_ON_ONCE(!chanctx_conf))
1710 ba_info->band = chanctx_conf->def.chan->band;
1711 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1713 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1714 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1720 while (!skb_queue_empty(&reclaimed_skbs)) {
1721 skb = __skb_dequeue(&reclaimed_skbs);
1722 ieee80211_tx_status(mvm->hw, skb);
1726 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1728 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1729 int sta_id, tid, txq, index;
1730 struct ieee80211_tx_info ba_info = {};
1731 struct iwl_mvm_ba_notif *ba_notif;
1732 struct iwl_mvm_tid_data *tid_data;
1733 struct iwl_mvm_sta *mvmsta;
1735 if (iwl_mvm_has_new_tx_api(mvm)) {
1736 struct iwl_mvm_compressed_ba_notif *ba_res =
1739 sta_id = ba_res->sta_id;
1740 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1741 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1742 ba_info.status.tx_time =
1743 (u16)le32_to_cpu(ba_res->wireless_time);
1744 ba_info.status.status_driver_data[0] =
1745 (void *)(uintptr_t)ba_res->reduced_txp;
1749 * When supporting multi TID aggregations - we need to move
1750 * next_reclaimed to be per TXQ and not per TID or handle it
1751 * in a different way.
1752 * This will go together with SN and AddBA offload and cannot
1753 * be handled properly for now.
1755 WARN_ON(le16_to_cpu(ba_res->tfd_cnt) != 1);
1756 iwl_mvm_tx_reclaim(mvm, sta_id, ba_res->ra_tid[0].tid,
1757 (int)ba_res->tfd[0].q_num,
1758 le16_to_cpu(ba_res->tfd[0].tfd_index),
1759 &ba_info, le32_to_cpu(ba_res->tx_rate));
1761 IWL_DEBUG_TX_REPLY(mvm,
1762 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1763 sta_id, le32_to_cpu(ba_res->flags),
1764 le16_to_cpu(ba_res->txed),
1765 le16_to_cpu(ba_res->done));
1769 ba_notif = (void *)pkt->data;
1770 sta_id = ba_notif->sta_id;
1771 tid = ba_notif->tid;
1772 /* "flow" corresponds to Tx queue */
1773 txq = le16_to_cpu(ba_notif->scd_flow);
1774 /* "ssn" is start of block-ack Tx window, corresponds to index
1775 * (in Tx queue's circular buffer) of first TFD/frame in window */
1776 index = le16_to_cpu(ba_notif->scd_ssn);
1779 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1780 if (WARN_ON_ONCE(!mvmsta)) {
1785 tid_data = &mvmsta->tid_data[tid];
1787 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1788 ba_info.status.ampdu_len = ba_notif->txed;
1789 ba_info.status.tx_time = tid_data->tx_time;
1790 ba_info.status.status_driver_data[0] =
1791 (void *)(uintptr_t)ba_notif->reduced_txp;
1795 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1796 tid_data->rate_n_flags);
1798 IWL_DEBUG_TX_REPLY(mvm,
1799 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1800 (u8 *)&ba_notif->sta_addr_lo32, ba_notif->sta_id);
1802 IWL_DEBUG_TX_REPLY(mvm,
1803 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1804 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1805 le64_to_cpu(ba_notif->bitmap), txq, index,
1806 ba_notif->txed, ba_notif->txed_2_done);
1808 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1809 ba_notif->reduced_txp);
1813 * Note that there are transports that buffer frames before they reach
1814 * the firmware. This means that after flush_tx_path is called, the
1815 * queue might not be empty. The race-free way to handle this is to:
1816 * 1) set the station as draining
1817 * 2) flush the Tx path
1818 * 3) wait for the transport queues to be empty
1820 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1823 struct iwl_tx_path_flush_cmd flush_cmd = {
1824 .queues_ctl = cpu_to_le32(tfd_msk),
1825 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1828 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1829 sizeof(flush_cmd), &flush_cmd);
1831 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);