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[mirror_ubuntu-bionic-kernel.git] / drivers / net / wireless / intel / iwlwifi / mvm / tx.c
1 /******************************************************************************
2 *
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.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
11 *
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.
15 *
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.
20 *
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,
24 * USA
25 *
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
28 *
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32 *
33 * BSD LICENSE
34 *
35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
37 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
38 * All rights reserved.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 *
44 * * Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * * Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in
48 * the documentation and/or other materials provided with the
49 * distribution.
50 * * Neither the name Intel Corporation nor the names of its
51 * contributors may be used to endorse or promote products derived
52 * from this software without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
65 *
66 *****************************************************************************/
67 #include <linux/ieee80211.h>
68 #include <linux/etherdevice.h>
69 #include <linux/tcp.h>
70 #include <net/ip.h>
71 #include <net/ipv6.h>
72
73 #include "iwl-trans.h"
74 #include "iwl-eeprom-parse.h"
75 #include "mvm.h"
76 #include "sta.h"
77 #include "fw-dbg.h"
78
79 static void
80 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
81 u16 tid, u16 ssn)
82 {
83 struct iwl_fw_dbg_trigger_tlv *trig;
84 struct iwl_fw_dbg_trigger_ba *ba_trig;
85
86 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
87 return;
88
89 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
90 ba_trig = (void *)trig->data;
91
92 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
93 return;
94
95 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
96 return;
97
98 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
99 "BAR sent to %pM, tid %d, ssn %d",
100 addr, tid, ssn);
101 }
102
103 #define OPT_HDR(type, skb, off) \
104 (type *)(skb_network_header(skb) + (off))
105
106 static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
107 struct ieee80211_hdr *hdr,
108 struct ieee80211_tx_info *info)
109 {
110 u16 offload_assist = 0;
111 #if IS_ENABLED(CONFIG_INET)
112 u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
113 u8 protocol = 0;
114
115 /*
116 * Do not compute checksum if already computed or if transport will
117 * compute it
118 */
119 if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD)
120 goto out;
121
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);
128 goto out;
129 }
130
131 if (skb->protocol == htons(ETH_P_IP)) {
132 protocol = ip_hdr(skb)->protocol;
133 } else {
134 #if IS_ENABLED(CONFIG_IPV6)
135 struct ipv6hdr *ipv6h =
136 (struct ipv6hdr *)skb_network_header(skb);
137 unsigned int off = sizeof(*ipv6h);
138
139 protocol = ipv6h->nexthdr;
140 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
141 struct ipv6_opt_hdr *hp;
142
143 /* only supported extension headers */
144 if (protocol != NEXTHDR_ROUTING &&
145 protocol != NEXTHDR_HOP &&
146 protocol != NEXTHDR_DEST) {
147 skb_checksum_help(skb);
148 goto out;
149 }
150
151 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
152 protocol = hp->nexthdr;
153 off += ipv6_optlen(hp);
154 }
155 /* if we get here - protocol now should be TCP/UDP */
156 #endif
157 }
158
159 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
160 WARN_ON_ONCE(1);
161 skb_checksum_help(skb);
162 goto out;
163 }
164
165 /* enable L4 csum */
166 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
167
168 /*
169 * Set offset to IP header (snap).
170 * We don't support tunneling so no need to take care of inner header.
171 * Size is in words.
172 */
173 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
174
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);
180 }
181
182 /* reset UDP/TCP header csum */
183 if (protocol == IPPROTO_TCP)
184 tcp_hdr(skb)->check = 0;
185 else
186 udp_hdr(skb)->check = 0;
187
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;
191 mh_len /= 2;
192 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
193
194 out:
195 #endif
196 return offload_assist;
197 }
198
199 /*
200 * Sets most of the Tx cmd's fields
201 */
202 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
203 struct iwl_tx_cmd *tx_cmd,
204 struct ieee80211_tx_info *info, u8 sta_id)
205 {
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;
210 u8 ac;
211
212 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
213 tx_flags |= TX_CMD_FLG_ACK;
214 else
215 tx_flags &= ~TX_CMD_FLG_ACK;
216
217 if (ieee80211_is_probe_resp(fc))
218 tx_flags |= TX_CMD_FLG_TSF;
219
220 if (ieee80211_has_morefrags(fc))
221 tx_flags |= TX_CMD_FLG_MORE_FRAG;
222
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);
234
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,
241 ssn);
242 } else {
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;
246 else
247 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
248 }
249
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];
253 else
254 ac = tid_to_mac80211_ac[0];
255
256 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
257 TX_CMD_FLG_BT_PRIO_POS;
258
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);
264 else
265 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
266
267 /* The spec allows Action frames in A-MPDU, we don't support
268 * it
269 */
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);
273 } else {
274 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
275 }
276
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;
280
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;
285
286 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
287 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
288 tx_cmd->len = cpu_to_le16((u16)skb->len);
289 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
290 tx_cmd->sta_id = sta_id;
291
292 /* padding is inserted later in transport */
293 if (ieee80211_hdrlen(fc) % 4 &&
294 !(tx_cmd->offload_assist & cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU))))
295 tx_cmd->offload_assist |= cpu_to_le16(BIT(TX_CMD_OFFLD_PAD));
296
297 tx_cmd->offload_assist |=
298 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info));
299 }
300
301 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
302 struct ieee80211_tx_info *info,
303 struct ieee80211_sta *sta)
304 {
305 int rate_idx;
306 u8 rate_plcp;
307 u32 rate_flags;
308
309 /* HT rate doesn't make sense for a non data frame */
310 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
311 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n",
312 info->control.rates[0].flags,
313 info->control.rates[0].idx);
314
315 rate_idx = info->control.rates[0].idx;
316 /* if the rate isn't a well known legacy rate, take the lowest one */
317 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
318 rate_idx = rate_lowest_index(
319 &mvm->nvm_data->bands[info->band], sta);
320
321 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
322 if (info->band == NL80211_BAND_5GHZ)
323 rate_idx += IWL_FIRST_OFDM_RATE;
324
325 /* For 2.4 GHZ band, check that there is no need to remap */
326 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
327
328 /* Get PLCP rate for tx_cmd->rate_n_flags */
329 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
330
331 if (info->band == NL80211_BAND_2GHZ &&
332 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
333 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
334 else
335 rate_flags =
336 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
337
338 /* Set CCK flag as needed */
339 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
340 rate_flags |= RATE_MCS_CCK_MSK;
341
342 return (u32)rate_plcp | rate_flags;
343 }
344
345 /*
346 * Sets the fields in the Tx cmd that are rate related
347 */
348 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
349 struct ieee80211_tx_info *info,
350 struct ieee80211_sta *sta, __le16 fc)
351 {
352 /* Set retry limit on RTS packets */
353 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
354
355 /* Set retry limit on DATA packets and Probe Responses*/
356 if (ieee80211_is_probe_resp(fc)) {
357 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
358 tx_cmd->rts_retry_limit =
359 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
360 } else if (ieee80211_is_back_req(fc)) {
361 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
362 } else {
363 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
364 }
365
366 /*
367 * for data packets, rate info comes from the table inside the fw. This
368 * table is controlled by LINK_QUALITY commands
369 */
370
371 if (ieee80211_is_data(fc) && sta) {
372 tx_cmd->initial_rate_index = 0;
373 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
374 return;
375 } else if (ieee80211_is_back_req(fc)) {
376 tx_cmd->tx_flags |=
377 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
378 }
379
380 mvm->mgmt_last_antenna_idx =
381 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
382 mvm->mgmt_last_antenna_idx);
383
384 /* Set the rate in the TX cmd */
385 tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta));
386 }
387
388 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
389 u8 *crypto_hdr)
390 {
391 struct ieee80211_key_conf *keyconf = info->control.hw_key;
392 u64 pn;
393
394 pn = atomic64_inc_return(&keyconf->tx_pn);
395 crypto_hdr[0] = pn;
396 crypto_hdr[2] = 0;
397 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
398 crypto_hdr[1] = pn >> 8;
399 crypto_hdr[4] = pn >> 16;
400 crypto_hdr[5] = pn >> 24;
401 crypto_hdr[6] = pn >> 32;
402 crypto_hdr[7] = pn >> 40;
403 }
404
405 /*
406 * Sets the fields in the Tx cmd that are crypto related
407 */
408 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
409 struct ieee80211_tx_info *info,
410 struct iwl_tx_cmd *tx_cmd,
411 struct sk_buff *skb_frag,
412 int hdrlen)
413 {
414 struct ieee80211_key_conf *keyconf = info->control.hw_key;
415 u8 *crypto_hdr = skb_frag->data + hdrlen;
416 u64 pn;
417
418 switch (keyconf->cipher) {
419 case WLAN_CIPHER_SUITE_CCMP:
420 case WLAN_CIPHER_SUITE_CCMP_256:
421 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
422 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
423 break;
424
425 case WLAN_CIPHER_SUITE_TKIP:
426 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
427 pn = atomic64_inc_return(&keyconf->tx_pn);
428 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
429 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
430 break;
431
432 case WLAN_CIPHER_SUITE_WEP104:
433 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
434 /* fall through */
435 case WLAN_CIPHER_SUITE_WEP40:
436 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
437 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
438 TX_CMD_SEC_WEP_KEY_IDX_MSK);
439
440 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
441 break;
442 case WLAN_CIPHER_SUITE_GCMP:
443 case WLAN_CIPHER_SUITE_GCMP_256:
444 /* TODO: Taking the key from the table might introduce a race
445 * when PTK rekeying is done, having an old packets with a PN
446 * based on the old key but the message encrypted with a new
447 * one.
448 * Need to handle this.
449 */
450 tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TX_CMD_SEC_KEY_FROM_TABLE;
451 tx_cmd->key[0] = keyconf->hw_key_idx;
452 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
453 break;
454 default:
455 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
456 }
457 }
458
459 /*
460 * Allocates and sets the Tx cmd the driver data pointers in the skb
461 */
462 static struct iwl_device_cmd *
463 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
464 struct ieee80211_tx_info *info, int hdrlen,
465 struct ieee80211_sta *sta, u8 sta_id)
466 {
467 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
468 struct iwl_device_cmd *dev_cmd;
469 struct iwl_tx_cmd *tx_cmd;
470
471 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
472
473 if (unlikely(!dev_cmd))
474 return NULL;
475
476 memset(dev_cmd, 0, sizeof(*dev_cmd));
477 dev_cmd->hdr.cmd = TX_CMD;
478 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
479
480 if (info->control.hw_key)
481 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
482
483 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
484
485 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
486
487 return dev_cmd;
488 }
489
490 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
491 struct iwl_device_cmd *cmd)
492 {
493 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
494
495 memset(&skb_info->status, 0, sizeof(skb_info->status));
496 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
497
498 skb_info->driver_data[1] = cmd;
499 }
500
501 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
502 struct ieee80211_tx_info *info, __le16 fc)
503 {
504 if (!iwl_mvm_is_dqa_supported(mvm))
505 return info->hw_queue;
506
507 switch (info->control.vif->type) {
508 case NL80211_IFTYPE_AP:
509 case NL80211_IFTYPE_ADHOC:
510 /*
511 * Handle legacy hostapd as well, where station may be added
512 * only after assoc. Take care of the case where we send a
513 * deauth to a station that we don't have.
514 */
515 if (ieee80211_is_probe_resp(fc) || ieee80211_is_auth(fc) ||
516 ieee80211_is_deauth(fc))
517 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
518 if (info->hw_queue == info->control.vif->cab_queue)
519 return info->hw_queue;
520
521 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
522 "fc=0x%02x", le16_to_cpu(fc));
523 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
524 case NL80211_IFTYPE_P2P_DEVICE:
525 if (ieee80211_is_mgmt(fc))
526 return IWL_MVM_DQA_P2P_DEVICE_QUEUE;
527 if (info->hw_queue == info->control.vif->cab_queue)
528 return info->hw_queue;
529
530 WARN_ON_ONCE(1);
531 return IWL_MVM_DQA_P2P_DEVICE_QUEUE;
532 default:
533 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
534 return -1;
535 }
536 }
537
538 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
539 {
540 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
541 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
542 struct ieee80211_tx_info info;
543 struct iwl_device_cmd *dev_cmd;
544 struct iwl_tx_cmd *tx_cmd;
545 u8 sta_id;
546 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
547 int queue;
548
549 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
550 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
551 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
552 * and hence needs to be sent on the aux queue
553 */
554 if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
555 skb_info->control.vif->type == NL80211_IFTYPE_STATION)
556 skb_info->hw_queue = mvm->aux_queue;
557
558 memcpy(&info, skb->cb, sizeof(info));
559
560 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
561 return -1;
562
563 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
564 (!info.control.vif ||
565 info.hw_queue != info.control.vif->cab_queue)))
566 return -1;
567
568 queue = info.hw_queue;
569
570 /*
571 * If the interface on which the frame is sent is the P2P_DEVICE
572 * or an AP/GO interface use the broadcast station associated
573 * with it; otherwise if the interface is a managed interface
574 * use the AP station associated with it for multicast traffic
575 * (this is not possible for unicast packets as a TLDS discovery
576 * response are sent without a station entry); otherwise use the
577 * AUX station.
578 * In DQA mode, if vif is of type STATION and frames are not multicast
579 * or offchannel, they should be sent from the BSS queue.
580 * For example, TDLS setup frames should be sent on this queue,
581 * as they go through the AP.
582 */
583 sta_id = mvm->aux_sta.sta_id;
584 if (info.control.vif) {
585 struct iwl_mvm_vif *mvmvif =
586 iwl_mvm_vif_from_mac80211(info.control.vif);
587
588 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
589 info.control.vif->type == NL80211_IFTYPE_AP ||
590 info.control.vif->type == NL80211_IFTYPE_ADHOC) {
591 sta_id = mvmvif->bcast_sta.sta_id;
592 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info,
593 hdr->frame_control);
594 if (queue < 0)
595 return -1;
596
597 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
598 is_multicast_ether_addr(hdr->addr1)) {
599 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id);
600
601 if (ap_sta_id != IWL_MVM_STATION_COUNT)
602 sta_id = ap_sta_id;
603 } else if (iwl_mvm_is_dqa_supported(mvm) &&
604 info.control.vif->type == NL80211_IFTYPE_STATION &&
605 queue != mvm->aux_queue) {
606 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
607 }
608 }
609
610 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
611
612 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
613 if (!dev_cmd)
614 return -1;
615
616 /* From now on, we cannot access info->control */
617 iwl_mvm_skb_prepare_status(skb, dev_cmd);
618
619 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
620
621 /* Copy MAC header from skb into command buffer */
622 memcpy(tx_cmd->hdr, hdr, hdrlen);
623
624 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
625 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
626 return -1;
627 }
628
629 /*
630 * Increase the pending frames counter, so that later when a reply comes
631 * in and the counter is decreased - we don't start getting negative
632 * values.
633 * Note that we don't need to make sure it isn't agg'd, since we're
634 * TXing non-sta
635 * For DQA mode - we shouldn't increase it though
636 */
637 if (!iwl_mvm_is_dqa_supported(mvm))
638 atomic_inc(&mvm->pending_frames[sta_id]);
639
640 return 0;
641 }
642
643 #ifdef CONFIG_INET
644 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
645 struct ieee80211_tx_info *info,
646 struct ieee80211_sta *sta,
647 struct sk_buff_head *mpdus_skb)
648 {
649 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
650 struct ieee80211_hdr *hdr = (void *)skb->data;
651 unsigned int mss = skb_shinfo(skb)->gso_size;
652 struct sk_buff *tmp, *next;
653 char cb[sizeof(skb->cb)];
654 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
655 bool ipv4 = (skb->protocol == htons(ETH_P_IP));
656 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
657 u16 snap_ip_tcp, pad, i = 0;
658 unsigned int dbg_max_amsdu_len;
659 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG;
660 u8 *qc, tid, txf;
661
662 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
663 tcp_hdrlen(skb);
664
665 qc = ieee80211_get_qos_ctl(hdr);
666 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
667 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
668 return -EINVAL;
669
670 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len);
671
672 if (!sta->max_amsdu_len ||
673 !ieee80211_is_data_qos(hdr->frame_control) ||
674 (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) {
675 num_subframes = 1;
676 pad = 0;
677 goto segment;
678 }
679
680 /*
681 * Do not build AMSDU for IPv6 with extension headers.
682 * ask stack to segment and checkum the generated MPDUs for us.
683 */
684 if (skb->protocol == htons(ETH_P_IPV6) &&
685 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
686 IPPROTO_TCP) {
687 num_subframes = 1;
688 pad = 0;
689 netdev_features &= ~NETIF_F_CSUM_MASK;
690 goto segment;
691 }
692
693 /*
694 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
695 * during an BA session.
696 */
697 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
698 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) {
699 num_subframes = 1;
700 pad = 0;
701 goto segment;
702 }
703
704 max_amsdu_len = sta->max_amsdu_len;
705
706 /* the Tx FIFO to which this A-MSDU will be routed */
707 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
708
709 /*
710 * Don't send an AMSDU that will be longer than the TXF.
711 * Add a security margin of 256 for the TX command + headers.
712 * We also want to have the start of the next packet inside the
713 * fifo to be able to send bursts.
714 */
715 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
716 mvm->shared_mem_cfg.txfifo_size[txf] - 256);
717
718 if (unlikely(dbg_max_amsdu_len))
719 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
720 dbg_max_amsdu_len);
721
722 /*
723 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
724 * supported. This is a spec requirement (IEEE 802.11-2015
725 * section 8.7.3 NOTE 3).
726 */
727 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
728 !sta->vht_cap.vht_supported)
729 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
730
731 /* Sub frame header + SNAP + IP header + TCP header + MSS */
732 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
733 pad = (4 - subf_len) & 0x3;
734
735 /*
736 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
737 * N * subf_len + (N - 1) * pad.
738 */
739 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
740 if (num_subframes > 1)
741 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
742
743 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
744 tcp_hdrlen(skb) + skb->data_len;
745
746 /*
747 * Make sure we have enough TBs for the A-MSDU:
748 * 2 for each subframe
749 * 1 more for each fragment
750 * 1 more for the potential data in the header
751 */
752 num_subframes =
753 min_t(unsigned int, num_subframes,
754 (mvm->trans->max_skb_frags - 1 -
755 skb_shinfo(skb)->nr_frags) / 2);
756
757 /* This skb fits in one single A-MSDU */
758 if (num_subframes * mss >= tcp_payload_len) {
759 __skb_queue_tail(mpdus_skb, skb);
760 return 0;
761 }
762
763 /*
764 * Trick the segmentation function to make it
765 * create SKBs that can fit into one A-MSDU.
766 */
767 segment:
768 skb_shinfo(skb)->gso_size = num_subframes * mss;
769 memcpy(cb, skb->cb, sizeof(cb));
770
771 next = skb_gso_segment(skb, netdev_features);
772 skb_shinfo(skb)->gso_size = mss;
773 if (WARN_ON_ONCE(IS_ERR(next)))
774 return -EINVAL;
775 else if (next)
776 consume_skb(skb);
777
778 while (next) {
779 tmp = next;
780 next = tmp->next;
781
782 memcpy(tmp->cb, cb, sizeof(tmp->cb));
783 /*
784 * Compute the length of all the data added for the A-MSDU.
785 * This will be used to compute the length to write in the TX
786 * command. We have: SNAP + IP + TCP for n -1 subframes and
787 * ETH header for n subframes.
788 */
789 tcp_payload_len = skb_tail_pointer(tmp) -
790 skb_transport_header(tmp) -
791 tcp_hdrlen(tmp) + tmp->data_len;
792
793 if (ipv4)
794 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
795
796 if (tcp_payload_len > mss) {
797 skb_shinfo(tmp)->gso_size = mss;
798 } else {
799 qc = ieee80211_get_qos_ctl((void *)tmp->data);
800
801 if (ipv4)
802 ip_send_check(ip_hdr(tmp));
803 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
804 skb_shinfo(tmp)->gso_size = 0;
805 }
806
807 tmp->prev = NULL;
808 tmp->next = NULL;
809
810 __skb_queue_tail(mpdus_skb, tmp);
811 i++;
812 }
813
814 return 0;
815 }
816 #else /* CONFIG_INET */
817 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
818 struct ieee80211_tx_info *info,
819 struct ieee80211_sta *sta,
820 struct sk_buff_head *mpdus_skb)
821 {
822 /* Impossible to get TSO with CONFIG_INET */
823 WARN_ON(1);
824
825 return -1;
826 }
827 #endif
828
829 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
830 struct iwl_mvm_sta *mvm_sta, u8 tid,
831 struct sk_buff *skb)
832 {
833 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
834 u8 mac_queue = info->hw_queue;
835 struct sk_buff_head *deferred_tx_frames;
836
837 lockdep_assert_held(&mvm_sta->lock);
838
839 mvm_sta->deferred_traffic_tid_map |= BIT(tid);
840 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);
841
842 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;
843
844 skb_queue_tail(deferred_tx_frames, skb);
845
846 /*
847 * The first deferred frame should've stopped the MAC queues, so we
848 * should never get a second deferred frame for the RA/TID.
849 */
850 if (!WARN(skb_queue_len(deferred_tx_frames) != 1,
851 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid,
852 skb_queue_len(deferred_tx_frames))) {
853 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
854 schedule_work(&mvm->add_stream_wk);
855 }
856 }
857
858 /* Check if there are any timed-out TIDs on a given shared TXQ */
859 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
860 {
861 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
862 unsigned long now = jiffies;
863 int tid;
864
865 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
866 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
867 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
868 return true;
869 }
870
871 return false;
872 }
873
874 /*
875 * Sets the fields in the Tx cmd that are crypto related
876 */
877 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
878 struct ieee80211_tx_info *info,
879 struct ieee80211_sta *sta)
880 {
881 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
882 struct iwl_mvm_sta *mvmsta;
883 struct iwl_device_cmd *dev_cmd;
884 struct iwl_tx_cmd *tx_cmd;
885 __le16 fc;
886 u16 seq_number = 0;
887 u8 tid = IWL_MAX_TID_COUNT;
888 u8 txq_id = info->hw_queue;
889 bool is_ampdu = false;
890 int hdrlen;
891
892 mvmsta = iwl_mvm_sta_from_mac80211(sta);
893 fc = hdr->frame_control;
894 hdrlen = ieee80211_hdrlen(fc);
895
896 if (WARN_ON_ONCE(!mvmsta))
897 return -1;
898
899 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
900 return -1;
901
902 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
903 sta, mvmsta->sta_id);
904 if (!dev_cmd)
905 goto drop;
906
907 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
908
909 /*
910 * we handle that entirely ourselves -- for uAPSD the firmware
911 * will always send a notification, and for PS-Poll responses
912 * we'll notify mac80211 when getting frame status
913 */
914 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
915
916 spin_lock(&mvmsta->lock);
917
918 /* nullfunc frames should go to the MGMT queue regardless of QOS,
919 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
920 * assignment of MGMT TID
921 */
922 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
923 u8 *qc = NULL;
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;
928
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 if (WARN_ON_ONCE(is_ampdu &&
935 mvmsta->tid_data[tid].state != IWL_AGG_ON))
936 goto drop_unlock_sta;
937 }
938
939 if (iwl_mvm_is_dqa_supported(mvm) || is_ampdu)
940 txq_id = mvmsta->tid_data[tid].txq_id;
941 if (sta->tdls && !iwl_mvm_is_dqa_supported(mvm)) {
942 /* default to TID 0 for non-QoS packets */
943 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
944
945 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
946 }
947
948 /* Copy MAC header from skb into command buffer */
949 memcpy(tx_cmd->hdr, hdr, hdrlen);
950
951 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
952
953 /* Check if TXQ needs to be allocated or re-activated */
954 if (unlikely(txq_id == IEEE80211_INVAL_HW_QUEUE ||
955 !mvmsta->tid_data[tid].is_tid_active) &&
956 iwl_mvm_is_dqa_supported(mvm)) {
957 /* If TXQ needs to be allocated... */
958 if (txq_id == IEEE80211_INVAL_HW_QUEUE) {
959 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);
960
961 /*
962 * The frame is now deferred, and the worker scheduled
963 * will re-allocate it, so we can free it for now.
964 */
965 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
966 spin_unlock(&mvmsta->lock);
967 return 0;
968 }
969
970 /* If we are here - TXQ exists and needs to be re-activated */
971 spin_lock(&mvm->queue_info_lock);
972 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
973 mvmsta->tid_data[tid].is_tid_active = true;
974 spin_unlock(&mvm->queue_info_lock);
975
976 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n",
977 txq_id);
978 }
979
980 if (iwl_mvm_is_dqa_supported(mvm)) {
981 /* Keep track of the time of the last frame for this RA/TID */
982 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
983
984 /*
985 * If we have timed-out TIDs - schedule the worker that will
986 * reconfig the queues and update them
987 *
988 * Note that the mvm->queue_info_lock isn't being taken here in
989 * order to not serialize the TX flow. This isn't dangerous
990 * because scheduling mvm->add_stream_wk can't ruin the state,
991 * and if we DON'T schedule it due to some race condition then
992 * next TX we get here we will.
993 */
994 if (unlikely(mvm->queue_info[txq_id].status ==
995 IWL_MVM_QUEUE_SHARED &&
996 iwl_mvm_txq_should_update(mvm, txq_id)))
997 schedule_work(&mvm->add_stream_wk);
998 }
999
1000 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
1001 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
1002
1003 /* From now on, we cannot access info->control */
1004 iwl_mvm_skb_prepare_status(skb, dev_cmd);
1005
1006 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1007 goto drop_unlock_sta;
1008
1009 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1010 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1011
1012 spin_unlock(&mvmsta->lock);
1013
1014 /* Increase pending frames count if this isn't AMPDU or DQA queue */
1015 if (!iwl_mvm_is_dqa_supported(mvm) && !is_ampdu)
1016 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
1017
1018 return 0;
1019
1020 drop_unlock_sta:
1021 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1022 spin_unlock(&mvmsta->lock);
1023 drop:
1024 return -1;
1025 }
1026
1027 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
1028 struct ieee80211_sta *sta)
1029 {
1030 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1031 struct ieee80211_tx_info info;
1032 struct sk_buff_head mpdus_skbs;
1033 unsigned int payload_len;
1034 int ret;
1035
1036 if (WARN_ON_ONCE(!mvmsta))
1037 return -1;
1038
1039 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1040 return -1;
1041
1042 memcpy(&info, skb->cb, sizeof(info));
1043
1044 if (!skb_is_gso(skb))
1045 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1046
1047 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1048 tcp_hdrlen(skb) + skb->data_len;
1049
1050 if (payload_len <= skb_shinfo(skb)->gso_size)
1051 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1052
1053 __skb_queue_head_init(&mpdus_skbs);
1054
1055 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1056 if (ret)
1057 return ret;
1058
1059 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1060 return ret;
1061
1062 while (!skb_queue_empty(&mpdus_skbs)) {
1063 skb = __skb_dequeue(&mpdus_skbs);
1064
1065 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1066 if (ret) {
1067 __skb_queue_purge(&mpdus_skbs);
1068 return ret;
1069 }
1070 }
1071
1072 return 0;
1073 }
1074
1075 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1076 struct ieee80211_sta *sta, u8 tid)
1077 {
1078 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1079 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1080 struct ieee80211_vif *vif = mvmsta->vif;
1081
1082 lockdep_assert_held(&mvmsta->lock);
1083
1084 if ((tid_data->state == IWL_AGG_ON ||
1085 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA ||
1086 iwl_mvm_is_dqa_supported(mvm)) &&
1087 iwl_mvm_tid_queued(tid_data) == 0) {
1088 /*
1089 * Now that this aggregation or DQA queue is empty tell
1090 * mac80211 so it knows we no longer have frames buffered for
1091 * the station on this TID (for the TIM bitmap calculation.)
1092 */
1093 ieee80211_sta_set_buffered(sta, tid, false);
1094 }
1095
1096 if (tid_data->ssn != tid_data->next_reclaimed)
1097 return;
1098
1099 switch (tid_data->state) {
1100 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1101 IWL_DEBUG_TX_QUEUES(mvm,
1102 "Can continue addBA flow ssn = next_recl = %d\n",
1103 tid_data->next_reclaimed);
1104 tid_data->state = IWL_AGG_STARTING;
1105 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1106 break;
1107
1108 case IWL_EMPTYING_HW_QUEUE_DELBA:
1109 IWL_DEBUG_TX_QUEUES(mvm,
1110 "Can continue DELBA flow ssn = next_recl = %d\n",
1111 tid_data->next_reclaimed);
1112 if (!iwl_mvm_is_dqa_supported(mvm)) {
1113 u8 mac80211_ac = tid_to_mac80211_ac[tid];
1114
1115 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
1116 vif->hw_queue[mac80211_ac], tid,
1117 CMD_ASYNC);
1118 }
1119 tid_data->state = IWL_AGG_OFF;
1120 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1121 break;
1122
1123 default:
1124 break;
1125 }
1126 }
1127
1128 #ifdef CONFIG_IWLWIFI_DEBUG
1129 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1130 {
1131 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1132 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1133
1134 switch (status & TX_STATUS_MSK) {
1135 case TX_STATUS_SUCCESS:
1136 return "SUCCESS";
1137 TX_STATUS_POSTPONE(DELAY);
1138 TX_STATUS_POSTPONE(FEW_BYTES);
1139 TX_STATUS_POSTPONE(BT_PRIO);
1140 TX_STATUS_POSTPONE(QUIET_PERIOD);
1141 TX_STATUS_POSTPONE(CALC_TTAK);
1142 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1143 TX_STATUS_FAIL(SHORT_LIMIT);
1144 TX_STATUS_FAIL(LONG_LIMIT);
1145 TX_STATUS_FAIL(UNDERRUN);
1146 TX_STATUS_FAIL(DRAIN_FLOW);
1147 TX_STATUS_FAIL(RFKILL_FLUSH);
1148 TX_STATUS_FAIL(LIFE_EXPIRE);
1149 TX_STATUS_FAIL(DEST_PS);
1150 TX_STATUS_FAIL(HOST_ABORTED);
1151 TX_STATUS_FAIL(BT_RETRY);
1152 TX_STATUS_FAIL(STA_INVALID);
1153 TX_STATUS_FAIL(FRAG_DROPPED);
1154 TX_STATUS_FAIL(TID_DISABLE);
1155 TX_STATUS_FAIL(FIFO_FLUSHED);
1156 TX_STATUS_FAIL(SMALL_CF_POLL);
1157 TX_STATUS_FAIL(FW_DROP);
1158 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1159 }
1160
1161 return "UNKNOWN";
1162
1163 #undef TX_STATUS_FAIL
1164 #undef TX_STATUS_POSTPONE
1165 }
1166 #endif /* CONFIG_IWLWIFI_DEBUG */
1167
1168 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1169 enum nl80211_band band,
1170 struct ieee80211_tx_rate *r)
1171 {
1172 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1173 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1174 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1175 case RATE_MCS_CHAN_WIDTH_20:
1176 break;
1177 case RATE_MCS_CHAN_WIDTH_40:
1178 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1179 break;
1180 case RATE_MCS_CHAN_WIDTH_80:
1181 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1182 break;
1183 case RATE_MCS_CHAN_WIDTH_160:
1184 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1185 break;
1186 }
1187 if (rate_n_flags & RATE_MCS_SGI_MSK)
1188 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1189 if (rate_n_flags & RATE_MCS_HT_MSK) {
1190 r->flags |= IEEE80211_TX_RC_MCS;
1191 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1192 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1193 ieee80211_rate_set_vht(
1194 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1195 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1196 RATE_VHT_MCS_NSS_POS) + 1);
1197 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1198 } else {
1199 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1200 band);
1201 }
1202 }
1203
1204 /**
1205 * translate ucode response to mac80211 tx status control values
1206 */
1207 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1208 struct ieee80211_tx_info *info)
1209 {
1210 struct ieee80211_tx_rate *r = &info->status.rates[0];
1211
1212 info->status.antenna =
1213 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1214 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1215 }
1216
1217 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1218 u32 status)
1219 {
1220 struct iwl_fw_dbg_trigger_tlv *trig;
1221 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1222 int i;
1223
1224 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
1225 return;
1226
1227 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
1228 status_trig = (void *)trig->data;
1229
1230 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
1231 return;
1232
1233 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1234 /* don't collect on status 0 */
1235 if (!status_trig->statuses[i].status)
1236 break;
1237
1238 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1239 continue;
1240
1241 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
1242 "Tx status %d was received",
1243 status & TX_STATUS_MSK);
1244 break;
1245 }
1246 }
1247
1248 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1249 struct iwl_rx_packet *pkt)
1250 {
1251 struct ieee80211_sta *sta;
1252 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1253 int txq_id = SEQ_TO_QUEUE(sequence);
1254 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1255 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1256 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1257 u32 status = le16_to_cpu(tx_resp->status.status);
1258 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
1259 struct iwl_mvm_sta *mvmsta;
1260 struct sk_buff_head skbs;
1261 u8 skb_freed = 0;
1262 u16 next_reclaimed, seq_ctl;
1263 bool is_ndp = false;
1264
1265 __skb_queue_head_init(&skbs);
1266
1267 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1268
1269 /* we can free until ssn % q.n_bd not inclusive */
1270 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1271
1272 while (!skb_queue_empty(&skbs)) {
1273 struct sk_buff *skb = __skb_dequeue(&skbs);
1274 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1275
1276 skb_freed++;
1277
1278 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1279
1280 memset(&info->status, 0, sizeof(info->status));
1281
1282 /* inform mac80211 about what happened with the frame */
1283 switch (status & TX_STATUS_MSK) {
1284 case TX_STATUS_SUCCESS:
1285 case TX_STATUS_DIRECT_DONE:
1286 info->flags |= IEEE80211_TX_STAT_ACK;
1287 break;
1288 case TX_STATUS_FAIL_DEST_PS:
1289 /* In DQA, the FW should have stopped the queue and not
1290 * return this status
1291 */
1292 WARN_ON(iwl_mvm_is_dqa_supported(mvm));
1293 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1294 break;
1295 default:
1296 break;
1297 }
1298
1299 iwl_mvm_tx_status_check_trigger(mvm, status);
1300
1301 info->status.rates[0].count = tx_resp->failure_frame + 1;
1302 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1303 info);
1304 info->status.status_driver_data[1] =
1305 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1306
1307 /* Single frame failure in an AMPDU queue => send BAR */
1308 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1309 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1310 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
1311 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1312 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1313
1314 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1315 if (status != TX_STATUS_SUCCESS) {
1316 struct ieee80211_hdr *hdr = (void *)skb->data;
1317 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1318 }
1319
1320 if (unlikely(!seq_ctl)) {
1321 struct ieee80211_hdr *hdr = (void *)skb->data;
1322
1323 /*
1324 * If it is an NDP, we can't update next_reclaim since
1325 * its sequence control is 0. Note that for that same
1326 * reason, NDPs are never sent to A-MPDU'able queues
1327 * so that we can never have more than one freed frame
1328 * for a single Tx resonse (see WARN_ON below).
1329 */
1330 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1331 is_ndp = true;
1332 }
1333
1334 /*
1335 * TODO: this is not accurate if we are freeing more than one
1336 * packet.
1337 */
1338 info->status.tx_time =
1339 le16_to_cpu(tx_resp->wireless_media_time);
1340 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1341 info->status.status_driver_data[0] =
1342 (void *)(uintptr_t)tx_resp->reduced_tpc;
1343
1344 ieee80211_tx_status(mvm->hw, skb);
1345 }
1346
1347 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue) {
1348 /* If this is an aggregation queue, we use the ssn since:
1349 * ssn = wifi seq_num % 256.
1350 * The seq_ctl is the sequence control of the packet to which
1351 * this Tx response relates. But if there is a hole in the
1352 * bitmap of the BA we received, this Tx response may allow to
1353 * reclaim the hole and all the subsequent packets that were
1354 * already acked. In that case, seq_ctl != ssn, and the next
1355 * packet to be reclaimed will be ssn and not seq_ctl. In that
1356 * case, several packets will be reclaimed even if
1357 * frame_count = 1.
1358 *
1359 * The ssn is the index (% 256) of the latest packet that has
1360 * treated (acked / dropped) + 1.
1361 */
1362 next_reclaimed = ssn;
1363 } else {
1364 /* The next packet to be reclaimed is the one after this one */
1365 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
1366 }
1367
1368 IWL_DEBUG_TX_REPLY(mvm,
1369 "TXQ %d status %s (0x%08x)\n",
1370 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1371
1372 IWL_DEBUG_TX_REPLY(mvm,
1373 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1374 le32_to_cpu(tx_resp->initial_rate),
1375 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1376 ssn, next_reclaimed, seq_ctl);
1377
1378 rcu_read_lock();
1379
1380 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1381 /*
1382 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1383 * the firmware while we still have packets for it in the Tx queues.
1384 */
1385 if (WARN_ON_ONCE(!sta))
1386 goto out;
1387
1388 if (!IS_ERR(sta)) {
1389 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1390
1391 if (tid != IWL_TID_NON_QOS) {
1392 struct iwl_mvm_tid_data *tid_data =
1393 &mvmsta->tid_data[tid];
1394 bool send_eosp_ndp = false;
1395
1396 spin_lock_bh(&mvmsta->lock);
1397
1398 if (!is_ndp) {
1399 tid_data->next_reclaimed = next_reclaimed;
1400 IWL_DEBUG_TX_REPLY(mvm,
1401 "Next reclaimed packet:%d\n",
1402 next_reclaimed);
1403 } else {
1404 IWL_DEBUG_TX_REPLY(mvm,
1405 "NDP - don't update next_reclaimed\n");
1406 }
1407
1408 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1409
1410 if (mvmsta->sleep_tx_count) {
1411 mvmsta->sleep_tx_count--;
1412 if (mvmsta->sleep_tx_count &&
1413 !iwl_mvm_tid_queued(tid_data)) {
1414 /*
1415 * The number of frames in the queue
1416 * dropped to 0 even if we sent less
1417 * frames than we thought we had on the
1418 * Tx queue.
1419 * This means we had holes in the BA
1420 * window that we just filled, ask
1421 * mac80211 to send EOSP since the
1422 * firmware won't know how to do that.
1423 * Send NDP and the firmware will send
1424 * EOSP notification that will trigger
1425 * a call to ieee80211_sta_eosp().
1426 */
1427 send_eosp_ndp = true;
1428 }
1429 }
1430
1431 spin_unlock_bh(&mvmsta->lock);
1432 if (send_eosp_ndp) {
1433 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1434 IEEE80211_FRAME_RELEASE_UAPSD,
1435 1, tid, false, false);
1436 mvmsta->sleep_tx_count = 0;
1437 ieee80211_send_eosp_nullfunc(sta, tid);
1438 }
1439 }
1440
1441 if (mvmsta->next_status_eosp) {
1442 mvmsta->next_status_eosp = false;
1443 ieee80211_sta_eosp(sta);
1444 }
1445 } else {
1446 mvmsta = NULL;
1447 }
1448
1449 /*
1450 * If the txq is not an AMPDU queue, there is no chance we freed
1451 * several skbs. Check that out...
1452 */
1453 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue)
1454 goto out;
1455
1456 /* We can't free more than one frame at once on a shared queue */
1457 WARN_ON(skb_freed > 1);
1458
1459 /* If we have still frames for this STA nothing to do here */
1460 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
1461 goto out;
1462
1463 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
1464
1465 /*
1466 * If there are no pending frames for this STA and
1467 * the tx to this station is not disabled, notify
1468 * mac80211 that this station can now wake up in its
1469 * STA table.
1470 * If mvmsta is not NULL, sta is valid.
1471 */
1472
1473 spin_lock_bh(&mvmsta->lock);
1474
1475 if (!mvmsta->disable_tx)
1476 ieee80211_sta_block_awake(mvm->hw, sta, false);
1477
1478 spin_unlock_bh(&mvmsta->lock);
1479 }
1480
1481 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
1482 /*
1483 * We are draining and this was the last packet - pre_rcu_remove
1484 * has been called already. We might be after the
1485 * synchronize_net already.
1486 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
1487 */
1488 set_bit(sta_id, mvm->sta_drained);
1489 schedule_work(&mvm->sta_drained_wk);
1490 }
1491
1492 out:
1493 rcu_read_unlock();
1494 }
1495
1496 #ifdef CONFIG_IWLWIFI_DEBUG
1497 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1498 static const char *iwl_get_agg_tx_status(u16 status)
1499 {
1500 switch (status & AGG_TX_STATE_STATUS_MSK) {
1501 AGG_TX_STATE_(TRANSMITTED);
1502 AGG_TX_STATE_(UNDERRUN);
1503 AGG_TX_STATE_(BT_PRIO);
1504 AGG_TX_STATE_(FEW_BYTES);
1505 AGG_TX_STATE_(ABORT);
1506 AGG_TX_STATE_(LAST_SENT_TTL);
1507 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1508 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1509 AGG_TX_STATE_(SCD_QUERY);
1510 AGG_TX_STATE_(TEST_BAD_CRC32);
1511 AGG_TX_STATE_(RESPONSE);
1512 AGG_TX_STATE_(DUMP_TX);
1513 AGG_TX_STATE_(DELAY_TX);
1514 }
1515
1516 return "UNKNOWN";
1517 }
1518
1519 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1520 struct iwl_rx_packet *pkt)
1521 {
1522 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1523 struct agg_tx_status *frame_status = &tx_resp->status;
1524 int i;
1525
1526 for (i = 0; i < tx_resp->frame_count; i++) {
1527 u16 fstatus = le16_to_cpu(frame_status[i].status);
1528
1529 IWL_DEBUG_TX_REPLY(mvm,
1530 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1531 iwl_get_agg_tx_status(fstatus),
1532 fstatus & AGG_TX_STATE_STATUS_MSK,
1533 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1534 AGG_TX_STATE_TRY_CNT_POS,
1535 le16_to_cpu(frame_status[i].sequence));
1536 }
1537 }
1538 #else
1539 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1540 struct iwl_rx_packet *pkt)
1541 {}
1542 #endif /* CONFIG_IWLWIFI_DEBUG */
1543
1544 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1545 struct iwl_rx_packet *pkt)
1546 {
1547 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1548 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1549 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1550 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1551 struct iwl_mvm_sta *mvmsta;
1552 int queue = SEQ_TO_QUEUE(sequence);
1553
1554 if (WARN_ON_ONCE(queue < mvm->first_agg_queue &&
1555 (!iwl_mvm_is_dqa_supported(mvm) ||
1556 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))))
1557 return;
1558
1559 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1560 return;
1561
1562 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1563
1564 rcu_read_lock();
1565
1566 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1567
1568 if (!WARN_ON_ONCE(!mvmsta)) {
1569 mvmsta->tid_data[tid].rate_n_flags =
1570 le32_to_cpu(tx_resp->initial_rate);
1571 mvmsta->tid_data[tid].tx_time =
1572 le16_to_cpu(tx_resp->wireless_media_time);
1573 }
1574
1575 rcu_read_unlock();
1576 }
1577
1578 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1579 {
1580 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1581 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1582
1583 if (tx_resp->frame_count == 1)
1584 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1585 else
1586 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1587 }
1588
1589 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1590 int txq, int index,
1591 struct ieee80211_tx_info *ba_info, u32 rate)
1592 {
1593 struct sk_buff_head reclaimed_skbs;
1594 struct iwl_mvm_tid_data *tid_data;
1595 struct ieee80211_sta *sta;
1596 struct iwl_mvm_sta *mvmsta;
1597 struct sk_buff *skb;
1598 int freed;
1599
1600 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1601 tid >= IWL_MAX_TID_COUNT,
1602 "sta_id %d tid %d", sta_id, tid))
1603 return;
1604
1605 rcu_read_lock();
1606
1607 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1608
1609 /* Reclaiming frames for a station that has been deleted ? */
1610 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1611 rcu_read_unlock();
1612 return;
1613 }
1614
1615 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1616 tid_data = &mvmsta->tid_data[tid];
1617
1618 if (tid_data->txq_id != txq) {
1619 IWL_ERR(mvm,
1620 "invalid BA notification: Q %d, tid %d\n",
1621 tid_data->txq_id, tid);
1622 rcu_read_unlock();
1623 return;
1624 }
1625
1626 spin_lock_bh(&mvmsta->lock);
1627
1628 __skb_queue_head_init(&reclaimed_skbs);
1629
1630 /*
1631 * Release all TFDs before the SSN, i.e. all TFDs in front of
1632 * block-ack window (we assume that they've been successfully
1633 * transmitted ... if not, it's too late anyway).
1634 */
1635 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1636
1637 tid_data->next_reclaimed = index;
1638
1639 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1640
1641 freed = 0;
1642 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1643
1644 skb_queue_walk(&reclaimed_skbs, skb) {
1645 struct ieee80211_hdr *hdr = (void *)skb->data;
1646 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1647
1648 if (ieee80211_is_data_qos(hdr->frame_control))
1649 freed++;
1650 else
1651 WARN_ON_ONCE(1);
1652
1653 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1654
1655 memset(&info->status, 0, sizeof(info->status));
1656 /* Packet was transmitted successfully, failures come as single
1657 * frames because before failing a frame the firmware transmits
1658 * it without aggregation at least once.
1659 */
1660 info->flags |= IEEE80211_TX_STAT_ACK;
1661
1662 /* this is the first skb we deliver in this batch */
1663 /* put the rate scaling data there */
1664 if (freed == 1) {
1665 info->flags |= IEEE80211_TX_STAT_AMPDU;
1666 memcpy(&info->status, &ba_info->status,
1667 sizeof(ba_info->status));
1668 iwl_mvm_hwrate_to_tx_status(rate, info);
1669 }
1670 }
1671
1672 spin_unlock_bh(&mvmsta->lock);
1673
1674 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1675 * possible (i.e. first MPDU in the aggregation wasn't acked)
1676 * Still it's important to update RS about sent vs. acked.
1677 */
1678 if (skb_queue_empty(&reclaimed_skbs)) {
1679 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1680
1681 if (mvmsta->vif)
1682 chanctx_conf =
1683 rcu_dereference(mvmsta->vif->chanctx_conf);
1684
1685 if (WARN_ON_ONCE(!chanctx_conf))
1686 goto out;
1687
1688 ba_info->band = chanctx_conf->def.chan->band;
1689 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1690
1691 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1692 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1693 }
1694
1695 out:
1696 rcu_read_unlock();
1697
1698 while (!skb_queue_empty(&reclaimed_skbs)) {
1699 skb = __skb_dequeue(&reclaimed_skbs);
1700 ieee80211_tx_status(mvm->hw, skb);
1701 }
1702 }
1703
1704 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1705 {
1706 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1707 int sta_id, tid, txq, index;
1708 struct ieee80211_tx_info ba_info = {};
1709 struct iwl_mvm_ba_notif *ba_notif;
1710 struct iwl_mvm_tid_data *tid_data;
1711 struct iwl_mvm_sta *mvmsta;
1712
1713 if (iwl_mvm_has_new_tx_api(mvm)) {
1714 struct iwl_mvm_compressed_ba_notif *ba_res =
1715 (void *)pkt->data;
1716
1717 sta_id = ba_res->sta_id;
1718 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1719 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1720 ba_info.status.tx_time =
1721 (u16)le32_to_cpu(ba_res->wireless_time);
1722 ba_info.status.status_driver_data[0] =
1723 (void *)(uintptr_t)ba_res->reduced_txp;
1724
1725 /*
1726 * TODO:
1727 * When supporting multi TID aggregations - we need to move
1728 * next_reclaimed to be per TXQ and not per TID or handle it
1729 * in a different way.
1730 * This will go together with SN and AddBA offload and cannot
1731 * be handled properly for now.
1732 */
1733 WARN_ON(le16_to_cpu(ba_res->tfd_cnt) != 1);
1734 iwl_mvm_tx_reclaim(mvm, sta_id, ba_res->ra_tid[0].tid,
1735 (int)ba_res->tfd[0].q_num,
1736 le16_to_cpu(ba_res->tfd[0].tfd_index),
1737 &ba_info, le32_to_cpu(ba_res->tx_rate));
1738
1739 IWL_DEBUG_TX_REPLY(mvm,
1740 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1741 sta_id, le32_to_cpu(ba_res->flags),
1742 le16_to_cpu(ba_res->txed),
1743 le16_to_cpu(ba_res->done));
1744 return;
1745 }
1746
1747 ba_notif = (void *)pkt->data;
1748 sta_id = ba_notif->sta_id;
1749 tid = ba_notif->tid;
1750 /* "flow" corresponds to Tx queue */
1751 txq = le16_to_cpu(ba_notif->scd_flow);
1752 /* "ssn" is start of block-ack Tx window, corresponds to index
1753 * (in Tx queue's circular buffer) of first TFD/frame in window */
1754 index = le16_to_cpu(ba_notif->scd_ssn);
1755
1756 rcu_read_lock();
1757 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1758 if (WARN_ON_ONCE(!mvmsta)) {
1759 rcu_read_unlock();
1760 return;
1761 }
1762
1763 tid_data = &mvmsta->tid_data[tid];
1764
1765 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1766 ba_info.status.ampdu_len = ba_notif->txed;
1767 ba_info.status.tx_time = tid_data->tx_time;
1768 ba_info.status.status_driver_data[0] =
1769 (void *)(uintptr_t)ba_notif->reduced_txp;
1770
1771 rcu_read_unlock();
1772
1773 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1774 tid_data->rate_n_flags);
1775
1776 IWL_DEBUG_TX_REPLY(mvm,
1777 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1778 (u8 *)&ba_notif->sta_addr_lo32, ba_notif->sta_id);
1779
1780 IWL_DEBUG_TX_REPLY(mvm,
1781 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1782 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1783 le64_to_cpu(ba_notif->bitmap), txq, index,
1784 ba_notif->txed, ba_notif->txed_2_done);
1785
1786 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1787 ba_notif->reduced_txp);
1788 }
1789
1790 /*
1791 * Note that there are transports that buffer frames before they reach
1792 * the firmware. This means that after flush_tx_path is called, the
1793 * queue might not be empty. The race-free way to handle this is to:
1794 * 1) set the station as draining
1795 * 2) flush the Tx path
1796 * 3) wait for the transport queues to be empty
1797 */
1798 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1799 {
1800 int ret;
1801 struct iwl_tx_path_flush_cmd flush_cmd = {
1802 .queues_ctl = cpu_to_le32(tfd_msk),
1803 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1804 };
1805
1806 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1807 sizeof(flush_cmd), &flush_cmd);
1808 if (ret)
1809 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1810 return ret;
1811 }
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