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Merge branch 'bind_unbind' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
[GitHub/LineageOS/android_kernel_motorola_exynos9610.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
479 if (iwl_mvm_has_new_tx_api(mvm)) {
480 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
481 u16 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info);
482
483 /* padding is inserted later in transport */
484 /* FIXME - check for AMSDU may need to be removed */
485 if (ieee80211_hdrlen(hdr->frame_control) % 4 &&
486 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
487 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
488
489 cmd->offload_assist |= cpu_to_le16(offload_assist);
490
491 /* Total # bytes to be transmitted */
492 cmd->len = cpu_to_le16((u16)skb->len);
493
494 /* Copy MAC header from skb into command buffer */
495 memcpy(cmd->hdr, hdr, hdrlen);
496
497 if (!info->control.hw_key)
498 cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_ENCRYPT_DIS);
499
500 /* For data packets rate info comes from the fw */
501 if (ieee80211_is_data(hdr->frame_control) && sta)
502 goto out;
503
504 cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_CMD_RATE);
505 cmd->rate_n_flags =
506 cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta));
507
508 goto out;
509 }
510
511 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
512
513 if (info->control.hw_key)
514 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
515
516 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
517
518 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
519
520 /* Copy MAC header from skb into command buffer */
521 memcpy(tx_cmd->hdr, hdr, hdrlen);
522
523 out:
524 return dev_cmd;
525 }
526
527 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
528 struct iwl_device_cmd *cmd)
529 {
530 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
531
532 memset(&skb_info->status, 0, sizeof(skb_info->status));
533 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
534
535 skb_info->driver_data[1] = cmd;
536 }
537
538 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
539 struct ieee80211_tx_info *info, __le16 fc)
540 {
541 if (!iwl_mvm_is_dqa_supported(mvm))
542 return info->hw_queue;
543
544 switch (info->control.vif->type) {
545 case NL80211_IFTYPE_AP:
546 case NL80211_IFTYPE_ADHOC:
547 /*
548 * Handle legacy hostapd as well, where station may be added
549 * only after assoc. Take care of the case where we send a
550 * deauth to a station that we don't have.
551 */
552 if (ieee80211_is_probe_resp(fc) || ieee80211_is_auth(fc) ||
553 ieee80211_is_deauth(fc))
554 return mvm->probe_queue;
555 if (info->hw_queue == info->control.vif->cab_queue)
556 return info->hw_queue;
557
558 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
559 "fc=0x%02x", le16_to_cpu(fc));
560 return mvm->probe_queue;
561 case NL80211_IFTYPE_P2P_DEVICE:
562 if (ieee80211_is_mgmt(fc))
563 return mvm->p2p_dev_queue;
564 if (info->hw_queue == info->control.vif->cab_queue)
565 return info->hw_queue;
566
567 WARN_ON_ONCE(1);
568 return mvm->p2p_dev_queue;
569 default:
570 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
571 return -1;
572 }
573 }
574
575 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
576 {
577 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
578 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
579 struct ieee80211_tx_info info;
580 struct iwl_device_cmd *dev_cmd;
581 u8 sta_id;
582 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
583 int queue;
584
585 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
586 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
587 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
588 * and hence needs to be sent on the aux queue
589 */
590 if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
591 skb_info->control.vif->type == NL80211_IFTYPE_STATION)
592 skb_info->hw_queue = mvm->aux_queue;
593
594 memcpy(&info, skb->cb, sizeof(info));
595
596 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
597 return -1;
598
599 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
600 (!info.control.vif ||
601 info.hw_queue != info.control.vif->cab_queue)))
602 return -1;
603
604 queue = info.hw_queue;
605
606 /*
607 * If the interface on which the frame is sent is the P2P_DEVICE
608 * or an AP/GO interface use the broadcast station associated
609 * with it; otherwise if the interface is a managed interface
610 * use the AP station associated with it for multicast traffic
611 * (this is not possible for unicast packets as a TLDS discovery
612 * response are sent without a station entry); otherwise use the
613 * AUX station.
614 * In DQA mode, if vif is of type STATION and frames are not multicast
615 * or offchannel, they should be sent from the BSS queue.
616 * For example, TDLS setup frames should be sent on this queue,
617 * as they go through the AP.
618 */
619 sta_id = mvm->aux_sta.sta_id;
620 if (info.control.vif) {
621 struct iwl_mvm_vif *mvmvif =
622 iwl_mvm_vif_from_mac80211(info.control.vif);
623
624 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
625 info.control.vif->type == NL80211_IFTYPE_AP ||
626 info.control.vif->type == NL80211_IFTYPE_ADHOC) {
627 sta_id = mvmvif->bcast_sta.sta_id;
628 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info,
629 hdr->frame_control);
630 if (queue < 0)
631 return -1;
632
633 if (queue == info.control.vif->cab_queue)
634 queue = mvmvif->cab_queue;
635 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
636 is_multicast_ether_addr(hdr->addr1)) {
637 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id);
638
639 if (ap_sta_id != IWL_MVM_INVALID_STA)
640 sta_id = ap_sta_id;
641 } else if (iwl_mvm_is_dqa_supported(mvm) &&
642 info.control.vif->type == NL80211_IFTYPE_STATION &&
643 queue != mvm->aux_queue) {
644 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
645 }
646 }
647
648 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
649
650 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
651 if (!dev_cmd)
652 return -1;
653
654 /* From now on, we cannot access info->control */
655 iwl_mvm_skb_prepare_status(skb, dev_cmd);
656
657 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
658 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
659 return -1;
660 }
661
662 /*
663 * Increase the pending frames counter, so that later when a reply comes
664 * in and the counter is decreased - we don't start getting negative
665 * values.
666 * Note that we don't need to make sure it isn't agg'd, since we're
667 * TXing non-sta
668 * For DQA mode - we shouldn't increase it though
669 */
670 if (!iwl_mvm_is_dqa_supported(mvm))
671 atomic_inc(&mvm->pending_frames[sta_id]);
672
673 return 0;
674 }
675
676 #ifdef CONFIG_INET
677 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
678 struct ieee80211_tx_info *info,
679 struct ieee80211_sta *sta,
680 struct sk_buff_head *mpdus_skb)
681 {
682 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
683 struct ieee80211_hdr *hdr = (void *)skb->data;
684 unsigned int mss = skb_shinfo(skb)->gso_size;
685 struct sk_buff *tmp, *next;
686 char cb[sizeof(skb->cb)];
687 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
688 bool ipv4 = (skb->protocol == htons(ETH_P_IP));
689 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
690 u16 snap_ip_tcp, pad, i = 0;
691 unsigned int dbg_max_amsdu_len;
692 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG;
693 u8 *qc, tid, txf;
694
695 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
696 tcp_hdrlen(skb);
697
698 qc = ieee80211_get_qos_ctl(hdr);
699 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
700 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
701 return -EINVAL;
702
703 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len);
704
705 if (!sta->max_amsdu_len ||
706 !ieee80211_is_data_qos(hdr->frame_control) ||
707 (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) {
708 num_subframes = 1;
709 pad = 0;
710 goto segment;
711 }
712
713 /*
714 * Do not build AMSDU for IPv6 with extension headers.
715 * ask stack to segment and checkum the generated MPDUs for us.
716 */
717 if (skb->protocol == htons(ETH_P_IPV6) &&
718 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
719 IPPROTO_TCP) {
720 num_subframes = 1;
721 pad = 0;
722 netdev_features &= ~NETIF_F_CSUM_MASK;
723 goto segment;
724 }
725
726 /*
727 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
728 * during an BA session.
729 */
730 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
731 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) {
732 num_subframes = 1;
733 pad = 0;
734 goto segment;
735 }
736
737 max_amsdu_len = sta->max_amsdu_len;
738
739 /* the Tx FIFO to which this A-MSDU will be routed */
740 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
741
742 /*
743 * Don't send an AMSDU that will be longer than the TXF.
744 * Add a security margin of 256 for the TX command + headers.
745 * We also want to have the start of the next packet inside the
746 * fifo to be able to send bursts.
747 */
748 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
749 mvm->smem_cfg.lmac[0].txfifo_size[txf] - 256);
750
751 if (unlikely(dbg_max_amsdu_len))
752 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
753 dbg_max_amsdu_len);
754
755 /*
756 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
757 * supported. This is a spec requirement (IEEE 802.11-2015
758 * section 8.7.3 NOTE 3).
759 */
760 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
761 !sta->vht_cap.vht_supported)
762 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
763
764 /* Sub frame header + SNAP + IP header + TCP header + MSS */
765 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
766 pad = (4 - subf_len) & 0x3;
767
768 /*
769 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
770 * N * subf_len + (N - 1) * pad.
771 */
772 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
773 if (num_subframes > 1)
774 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
775
776 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
777 tcp_hdrlen(skb) + skb->data_len;
778
779 /*
780 * Make sure we have enough TBs for the A-MSDU:
781 * 2 for each subframe
782 * 1 more for each fragment
783 * 1 more for the potential data in the header
784 */
785 num_subframes =
786 min_t(unsigned int, num_subframes,
787 (mvm->trans->max_skb_frags - 1 -
788 skb_shinfo(skb)->nr_frags) / 2);
789
790 /* This skb fits in one single A-MSDU */
791 if (num_subframes * mss >= tcp_payload_len) {
792 __skb_queue_tail(mpdus_skb, skb);
793 return 0;
794 }
795
796 /*
797 * Trick the segmentation function to make it
798 * create SKBs that can fit into one A-MSDU.
799 */
800 segment:
801 skb_shinfo(skb)->gso_size = num_subframes * mss;
802 memcpy(cb, skb->cb, sizeof(cb));
803
804 next = skb_gso_segment(skb, netdev_features);
805 skb_shinfo(skb)->gso_size = mss;
806 if (WARN_ON_ONCE(IS_ERR(next)))
807 return -EINVAL;
808 else if (next)
809 consume_skb(skb);
810
811 while (next) {
812 tmp = next;
813 next = tmp->next;
814
815 memcpy(tmp->cb, cb, sizeof(tmp->cb));
816 /*
817 * Compute the length of all the data added for the A-MSDU.
818 * This will be used to compute the length to write in the TX
819 * command. We have: SNAP + IP + TCP for n -1 subframes and
820 * ETH header for n subframes.
821 */
822 tcp_payload_len = skb_tail_pointer(tmp) -
823 skb_transport_header(tmp) -
824 tcp_hdrlen(tmp) + tmp->data_len;
825
826 if (ipv4)
827 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
828
829 if (tcp_payload_len > mss) {
830 skb_shinfo(tmp)->gso_size = mss;
831 } else {
832 qc = ieee80211_get_qos_ctl((void *)tmp->data);
833
834 if (ipv4)
835 ip_send_check(ip_hdr(tmp));
836 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
837 skb_shinfo(tmp)->gso_size = 0;
838 }
839
840 tmp->prev = NULL;
841 tmp->next = NULL;
842
843 __skb_queue_tail(mpdus_skb, tmp);
844 i++;
845 }
846
847 return 0;
848 }
849 #else /* CONFIG_INET */
850 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
851 struct ieee80211_tx_info *info,
852 struct ieee80211_sta *sta,
853 struct sk_buff_head *mpdus_skb)
854 {
855 /* Impossible to get TSO with CONFIG_INET */
856 WARN_ON(1);
857
858 return -1;
859 }
860 #endif
861
862 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
863 struct iwl_mvm_sta *mvm_sta, u8 tid,
864 struct sk_buff *skb)
865 {
866 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
867 u8 mac_queue = info->hw_queue;
868 struct sk_buff_head *deferred_tx_frames;
869
870 lockdep_assert_held(&mvm_sta->lock);
871
872 mvm_sta->deferred_traffic_tid_map |= BIT(tid);
873 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);
874
875 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;
876
877 skb_queue_tail(deferred_tx_frames, skb);
878
879 /*
880 * The first deferred frame should've stopped the MAC queues, so we
881 * should never get a second deferred frame for the RA/TID.
882 */
883 if (!WARN(skb_queue_len(deferred_tx_frames) != 1,
884 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid,
885 skb_queue_len(deferred_tx_frames))) {
886 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
887 schedule_work(&mvm->add_stream_wk);
888 }
889 }
890
891 /* Check if there are any timed-out TIDs on a given shared TXQ */
892 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
893 {
894 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
895 unsigned long now = jiffies;
896 int tid;
897
898 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
899 return false;
900
901 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
902 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
903 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
904 return true;
905 }
906
907 return false;
908 }
909
910 /*
911 * Sets the fields in the Tx cmd that are crypto related
912 */
913 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
914 struct ieee80211_tx_info *info,
915 struct ieee80211_sta *sta)
916 {
917 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
918 struct iwl_mvm_sta *mvmsta;
919 struct iwl_device_cmd *dev_cmd;
920 __le16 fc;
921 u16 seq_number = 0;
922 u8 tid = IWL_MAX_TID_COUNT;
923 u16 txq_id = info->hw_queue;
924 bool is_ampdu = false;
925 int hdrlen;
926
927 mvmsta = iwl_mvm_sta_from_mac80211(sta);
928 fc = hdr->frame_control;
929 hdrlen = ieee80211_hdrlen(fc);
930
931 if (WARN_ON_ONCE(!mvmsta))
932 return -1;
933
934 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
935 return -1;
936
937 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
938 sta, mvmsta->sta_id);
939 if (!dev_cmd)
940 goto drop;
941
942 /*
943 * we handle that entirely ourselves -- for uAPSD the firmware
944 * will always send a notification, and for PS-Poll responses
945 * we'll notify mac80211 when getting frame status
946 */
947 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
948
949 spin_lock(&mvmsta->lock);
950
951 /* nullfunc frames should go to the MGMT queue regardless of QOS,
952 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
953 * assignment of MGMT TID
954 */
955 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
956 u8 *qc = NULL;
957 qc = ieee80211_get_qos_ctl(hdr);
958 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
959 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
960 goto drop_unlock_sta;
961
962 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
963 if (WARN_ON_ONCE(is_ampdu &&
964 mvmsta->tid_data[tid].state != IWL_AGG_ON))
965 goto drop_unlock_sta;
966
967 seq_number = mvmsta->tid_data[tid].seq_number;
968 seq_number &= IEEE80211_SCTL_SEQ;
969
970 if (!iwl_mvm_has_new_tx_api(mvm)) {
971 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
972
973 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
974 hdr->seq_ctrl |= cpu_to_le16(seq_number);
975 /* update the tx_cmd hdr as it was already copied */
976 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
977 }
978 }
979
980 if (iwl_mvm_is_dqa_supported(mvm) || is_ampdu)
981 txq_id = mvmsta->tid_data[tid].txq_id;
982
983 if (sta->tdls && !iwl_mvm_is_dqa_supported(mvm)) {
984 /* default to TID 0 for non-QoS packets */
985 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
986
987 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
988 }
989
990 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
991
992 /* Check if TXQ needs to be allocated or re-activated */
993 if (unlikely(txq_id == IWL_MVM_INVALID_QUEUE ||
994 !mvmsta->tid_data[tid].is_tid_active) &&
995 iwl_mvm_is_dqa_supported(mvm)) {
996 /* If TXQ needs to be allocated... */
997 if (txq_id == IWL_MVM_INVALID_QUEUE) {
998 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);
999
1000 /*
1001 * The frame is now deferred, and the worker scheduled
1002 * will re-allocate it, so we can free it for now.
1003 */
1004 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1005 spin_unlock(&mvmsta->lock);
1006 return 0;
1007 }
1008
1009 /* queue should always be active in new TX path */
1010 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
1011
1012 /* If we are here - TXQ exists and needs to be re-activated */
1013 spin_lock(&mvm->queue_info_lock);
1014 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1015 mvmsta->tid_data[tid].is_tid_active = true;
1016 spin_unlock(&mvm->queue_info_lock);
1017
1018 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n",
1019 txq_id);
1020 }
1021
1022 if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) {
1023 /* Keep track of the time of the last frame for this RA/TID */
1024 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1025
1026 /*
1027 * If we have timed-out TIDs - schedule the worker that will
1028 * reconfig the queues and update them
1029 *
1030 * Note that the mvm->queue_info_lock isn't being taken here in
1031 * order to not serialize the TX flow. This isn't dangerous
1032 * because scheduling mvm->add_stream_wk can't ruin the state,
1033 * and if we DON'T schedule it due to some race condition then
1034 * next TX we get here we will.
1035 */
1036 if (unlikely(mvm->queue_info[txq_id].status ==
1037 IWL_MVM_QUEUE_SHARED &&
1038 iwl_mvm_txq_should_update(mvm, txq_id)))
1039 schedule_work(&mvm->add_stream_wk);
1040 }
1041
1042 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
1043 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
1044
1045 /* From now on, we cannot access info->control */
1046 iwl_mvm_skb_prepare_status(skb, dev_cmd);
1047
1048 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1049 goto drop_unlock_sta;
1050
1051 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1052 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1053
1054 spin_unlock(&mvmsta->lock);
1055
1056 /* Increase pending frames count if this isn't AMPDU or DQA queue */
1057 if (!iwl_mvm_is_dqa_supported(mvm) && !is_ampdu)
1058 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
1059
1060 return 0;
1061
1062 drop_unlock_sta:
1063 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1064 spin_unlock(&mvmsta->lock);
1065 drop:
1066 return -1;
1067 }
1068
1069 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
1070 struct ieee80211_sta *sta)
1071 {
1072 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1073 struct ieee80211_tx_info info;
1074 struct sk_buff_head mpdus_skbs;
1075 unsigned int payload_len;
1076 int ret;
1077
1078 if (WARN_ON_ONCE(!mvmsta))
1079 return -1;
1080
1081 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1082 return -1;
1083
1084 memcpy(&info, skb->cb, sizeof(info));
1085
1086 if (!skb_is_gso(skb))
1087 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1088
1089 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1090 tcp_hdrlen(skb) + skb->data_len;
1091
1092 if (payload_len <= skb_shinfo(skb)->gso_size)
1093 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1094
1095 __skb_queue_head_init(&mpdus_skbs);
1096
1097 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1098 if (ret)
1099 return ret;
1100
1101 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1102 return ret;
1103
1104 while (!skb_queue_empty(&mpdus_skbs)) {
1105 skb = __skb_dequeue(&mpdus_skbs);
1106
1107 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1108 if (ret) {
1109 __skb_queue_purge(&mpdus_skbs);
1110 return ret;
1111 }
1112 }
1113
1114 return 0;
1115 }
1116
1117 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1118 struct ieee80211_sta *sta, u8 tid)
1119 {
1120 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1121 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1122 struct ieee80211_vif *vif = mvmsta->vif;
1123
1124 lockdep_assert_held(&mvmsta->lock);
1125
1126 if ((tid_data->state == IWL_AGG_ON ||
1127 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA ||
1128 iwl_mvm_is_dqa_supported(mvm)) &&
1129 iwl_mvm_tid_queued(tid_data) == 0) {
1130 /*
1131 * Now that this aggregation or DQA queue is empty tell
1132 * mac80211 so it knows we no longer have frames buffered for
1133 * the station on this TID (for the TIM bitmap calculation.)
1134 */
1135 ieee80211_sta_set_buffered(sta, tid, false);
1136 }
1137
1138 if (tid_data->ssn != tid_data->next_reclaimed)
1139 return;
1140
1141 switch (tid_data->state) {
1142 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1143 IWL_DEBUG_TX_QUEUES(mvm,
1144 "Can continue addBA flow ssn = next_recl = %d\n",
1145 tid_data->next_reclaimed);
1146 tid_data->state = IWL_AGG_STARTING;
1147 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1148 break;
1149
1150 case IWL_EMPTYING_HW_QUEUE_DELBA:
1151 IWL_DEBUG_TX_QUEUES(mvm,
1152 "Can continue DELBA flow ssn = next_recl = %d\n",
1153 tid_data->next_reclaimed);
1154 if (!iwl_mvm_is_dqa_supported(mvm)) {
1155 u8 mac80211_ac = tid_to_mac80211_ac[tid];
1156
1157 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
1158 vif->hw_queue[mac80211_ac], tid,
1159 CMD_ASYNC);
1160 }
1161 tid_data->state = IWL_AGG_OFF;
1162 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1163 break;
1164
1165 default:
1166 break;
1167 }
1168 }
1169
1170 #ifdef CONFIG_IWLWIFI_DEBUG
1171 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1172 {
1173 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1174 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1175
1176 switch (status & TX_STATUS_MSK) {
1177 case TX_STATUS_SUCCESS:
1178 return "SUCCESS";
1179 TX_STATUS_POSTPONE(DELAY);
1180 TX_STATUS_POSTPONE(FEW_BYTES);
1181 TX_STATUS_POSTPONE(BT_PRIO);
1182 TX_STATUS_POSTPONE(QUIET_PERIOD);
1183 TX_STATUS_POSTPONE(CALC_TTAK);
1184 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1185 TX_STATUS_FAIL(SHORT_LIMIT);
1186 TX_STATUS_FAIL(LONG_LIMIT);
1187 TX_STATUS_FAIL(UNDERRUN);
1188 TX_STATUS_FAIL(DRAIN_FLOW);
1189 TX_STATUS_FAIL(RFKILL_FLUSH);
1190 TX_STATUS_FAIL(LIFE_EXPIRE);
1191 TX_STATUS_FAIL(DEST_PS);
1192 TX_STATUS_FAIL(HOST_ABORTED);
1193 TX_STATUS_FAIL(BT_RETRY);
1194 TX_STATUS_FAIL(STA_INVALID);
1195 TX_STATUS_FAIL(FRAG_DROPPED);
1196 TX_STATUS_FAIL(TID_DISABLE);
1197 TX_STATUS_FAIL(FIFO_FLUSHED);
1198 TX_STATUS_FAIL(SMALL_CF_POLL);
1199 TX_STATUS_FAIL(FW_DROP);
1200 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1201 }
1202
1203 return "UNKNOWN";
1204
1205 #undef TX_STATUS_FAIL
1206 #undef TX_STATUS_POSTPONE
1207 }
1208 #endif /* CONFIG_IWLWIFI_DEBUG */
1209
1210 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1211 enum nl80211_band band,
1212 struct ieee80211_tx_rate *r)
1213 {
1214 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1215 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1216 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1217 case RATE_MCS_CHAN_WIDTH_20:
1218 break;
1219 case RATE_MCS_CHAN_WIDTH_40:
1220 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1221 break;
1222 case RATE_MCS_CHAN_WIDTH_80:
1223 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1224 break;
1225 case RATE_MCS_CHAN_WIDTH_160:
1226 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1227 break;
1228 }
1229 if (rate_n_flags & RATE_MCS_SGI_MSK)
1230 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1231 if (rate_n_flags & RATE_MCS_HT_MSK) {
1232 r->flags |= IEEE80211_TX_RC_MCS;
1233 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1234 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1235 ieee80211_rate_set_vht(
1236 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1237 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1238 RATE_VHT_MCS_NSS_POS) + 1);
1239 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1240 } else {
1241 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1242 band);
1243 }
1244 }
1245
1246 /**
1247 * translate ucode response to mac80211 tx status control values
1248 */
1249 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1250 struct ieee80211_tx_info *info)
1251 {
1252 struct ieee80211_tx_rate *r = &info->status.rates[0];
1253
1254 info->status.antenna =
1255 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1256 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1257 }
1258
1259 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1260 u32 status)
1261 {
1262 struct iwl_fw_dbg_trigger_tlv *trig;
1263 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1264 int i;
1265
1266 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
1267 return;
1268
1269 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
1270 status_trig = (void *)trig->data;
1271
1272 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
1273 return;
1274
1275 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1276 /* don't collect on status 0 */
1277 if (!status_trig->statuses[i].status)
1278 break;
1279
1280 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1281 continue;
1282
1283 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
1284 "Tx status %d was received",
1285 status & TX_STATUS_MSK);
1286 break;
1287 }
1288 }
1289
1290 /**
1291 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1292 * @tx_resp: the Tx response from the fw (agg or non-agg)
1293 *
1294 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1295 * it can't know that everything will go well until the end of the AMPDU, it
1296 * can't know in advance the number of MPDUs that will be sent in the current
1297 * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1298 * Hence, it can't know in advance what the SSN of the SCD will be at the end
1299 * of the batch. This is why the SSN of the SCD is written at the end of the
1300 * whole struct at a variable offset. This function knows how to cope with the
1301 * variable offset and returns the SSN of the SCD.
1302 */
1303 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1304 struct iwl_mvm_tx_resp *tx_resp)
1305 {
1306 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1307 tx_resp->frame_count) & 0xfff;
1308 }
1309
1310 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1311 struct iwl_rx_packet *pkt)
1312 {
1313 struct ieee80211_sta *sta;
1314 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1315 int txq_id = SEQ_TO_QUEUE(sequence);
1316 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1317 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1318 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1319 struct agg_tx_status *agg_status =
1320 iwl_mvm_get_agg_status(mvm, tx_resp);
1321 u32 status = le16_to_cpu(agg_status->status);
1322 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1323 struct iwl_mvm_sta *mvmsta;
1324 struct sk_buff_head skbs;
1325 u8 skb_freed = 0;
1326 u8 lq_color;
1327 u16 next_reclaimed, seq_ctl;
1328 bool is_ndp = false;
1329
1330 __skb_queue_head_init(&skbs);
1331
1332 if (iwl_mvm_has_new_tx_api(mvm))
1333 txq_id = le16_to_cpu(tx_resp->v6.tx_queue);
1334
1335 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1336
1337 /* we can free until ssn % q.n_bd not inclusive */
1338 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1339
1340 while (!skb_queue_empty(&skbs)) {
1341 struct sk_buff *skb = __skb_dequeue(&skbs);
1342 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1343
1344 skb_freed++;
1345
1346 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1347
1348 memset(&info->status, 0, sizeof(info->status));
1349
1350 /* inform mac80211 about what happened with the frame */
1351 switch (status & TX_STATUS_MSK) {
1352 case TX_STATUS_SUCCESS:
1353 case TX_STATUS_DIRECT_DONE:
1354 info->flags |= IEEE80211_TX_STAT_ACK;
1355 break;
1356 case TX_STATUS_FAIL_DEST_PS:
1357 /* In DQA, the FW should have stopped the queue and not
1358 * return this status
1359 */
1360 WARN_ON(iwl_mvm_is_dqa_supported(mvm));
1361 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1362 break;
1363 default:
1364 break;
1365 }
1366
1367 iwl_mvm_tx_status_check_trigger(mvm, status);
1368
1369 info->status.rates[0].count = tx_resp->failure_frame + 1;
1370 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1371 info);
1372 info->status.status_driver_data[1] =
1373 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1374
1375 /* Single frame failure in an AMPDU queue => send BAR */
1376 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1377 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1378 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
1379 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1380 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1381
1382 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1383 if (status != TX_STATUS_SUCCESS) {
1384 struct ieee80211_hdr *hdr = (void *)skb->data;
1385 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1386 }
1387
1388 if (unlikely(!seq_ctl)) {
1389 struct ieee80211_hdr *hdr = (void *)skb->data;
1390
1391 /*
1392 * If it is an NDP, we can't update next_reclaim since
1393 * its sequence control is 0. Note that for that same
1394 * reason, NDPs are never sent to A-MPDU'able queues
1395 * so that we can never have more than one freed frame
1396 * for a single Tx resonse (see WARN_ON below).
1397 */
1398 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1399 is_ndp = true;
1400 }
1401
1402 /*
1403 * TODO: this is not accurate if we are freeing more than one
1404 * packet.
1405 */
1406 info->status.tx_time =
1407 le16_to_cpu(tx_resp->wireless_media_time);
1408 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1409 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1410 info->status.status_driver_data[0] =
1411 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1412
1413 ieee80211_tx_status(mvm->hw, skb);
1414 }
1415
1416 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue) {
1417 /* If this is an aggregation queue, we use the ssn since:
1418 * ssn = wifi seq_num % 256.
1419 * The seq_ctl is the sequence control of the packet to which
1420 * this Tx response relates. But if there is a hole in the
1421 * bitmap of the BA we received, this Tx response may allow to
1422 * reclaim the hole and all the subsequent packets that were
1423 * already acked. In that case, seq_ctl != ssn, and the next
1424 * packet to be reclaimed will be ssn and not seq_ctl. In that
1425 * case, several packets will be reclaimed even if
1426 * frame_count = 1.
1427 *
1428 * The ssn is the index (% 256) of the latest packet that has
1429 * treated (acked / dropped) + 1.
1430 */
1431 next_reclaimed = ssn;
1432 } else {
1433 /* The next packet to be reclaimed is the one after this one */
1434 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
1435 }
1436
1437 IWL_DEBUG_TX_REPLY(mvm,
1438 "TXQ %d status %s (0x%08x)\n",
1439 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1440
1441 IWL_DEBUG_TX_REPLY(mvm,
1442 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1443 le32_to_cpu(tx_resp->initial_rate),
1444 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1445 ssn, next_reclaimed, seq_ctl);
1446
1447 rcu_read_lock();
1448
1449 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1450 /*
1451 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1452 * the firmware while we still have packets for it in the Tx queues.
1453 */
1454 if (WARN_ON_ONCE(!sta))
1455 goto out;
1456
1457 if (!IS_ERR(sta)) {
1458 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1459
1460 if (tid != IWL_TID_NON_QOS && tid != IWL_MGMT_TID) {
1461 struct iwl_mvm_tid_data *tid_data =
1462 &mvmsta->tid_data[tid];
1463 bool send_eosp_ndp = false;
1464
1465 spin_lock_bh(&mvmsta->lock);
1466
1467 if (!is_ndp) {
1468 tid_data->next_reclaimed = next_reclaimed;
1469 IWL_DEBUG_TX_REPLY(mvm,
1470 "Next reclaimed packet:%d\n",
1471 next_reclaimed);
1472 } else {
1473 IWL_DEBUG_TX_REPLY(mvm,
1474 "NDP - don't update next_reclaimed\n");
1475 }
1476
1477 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1478
1479 if (mvmsta->sleep_tx_count) {
1480 mvmsta->sleep_tx_count--;
1481 if (mvmsta->sleep_tx_count &&
1482 !iwl_mvm_tid_queued(tid_data)) {
1483 /*
1484 * The number of frames in the queue
1485 * dropped to 0 even if we sent less
1486 * frames than we thought we had on the
1487 * Tx queue.
1488 * This means we had holes in the BA
1489 * window that we just filled, ask
1490 * mac80211 to send EOSP since the
1491 * firmware won't know how to do that.
1492 * Send NDP and the firmware will send
1493 * EOSP notification that will trigger
1494 * a call to ieee80211_sta_eosp().
1495 */
1496 send_eosp_ndp = true;
1497 }
1498 }
1499
1500 spin_unlock_bh(&mvmsta->lock);
1501 if (send_eosp_ndp) {
1502 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1503 IEEE80211_FRAME_RELEASE_UAPSD,
1504 1, tid, false, false);
1505 mvmsta->sleep_tx_count = 0;
1506 ieee80211_send_eosp_nullfunc(sta, tid);
1507 }
1508 }
1509
1510 if (mvmsta->next_status_eosp) {
1511 mvmsta->next_status_eosp = false;
1512 ieee80211_sta_eosp(sta);
1513 }
1514 } else {
1515 mvmsta = NULL;
1516 }
1517
1518 /*
1519 * If the txq is not an AMPDU queue, there is no chance we freed
1520 * several skbs. Check that out...
1521 */
1522 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue)
1523 goto out;
1524
1525 /* We can't free more than one frame at once on a shared queue */
1526 WARN_ON(skb_freed > 1);
1527
1528 /* If we have still frames for this STA nothing to do here */
1529 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
1530 goto out;
1531
1532 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
1533
1534 /*
1535 * If there are no pending frames for this STA and
1536 * the tx to this station is not disabled, notify
1537 * mac80211 that this station can now wake up in its
1538 * STA table.
1539 * If mvmsta is not NULL, sta is valid.
1540 */
1541
1542 spin_lock_bh(&mvmsta->lock);
1543
1544 if (!mvmsta->disable_tx)
1545 ieee80211_sta_block_awake(mvm->hw, sta, false);
1546
1547 spin_unlock_bh(&mvmsta->lock);
1548 }
1549
1550 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
1551 /*
1552 * We are draining and this was the last packet - pre_rcu_remove
1553 * has been called already. We might be after the
1554 * synchronize_net already.
1555 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
1556 */
1557 set_bit(sta_id, mvm->sta_drained);
1558 schedule_work(&mvm->sta_drained_wk);
1559 }
1560
1561 out:
1562 rcu_read_unlock();
1563 }
1564
1565 #ifdef CONFIG_IWLWIFI_DEBUG
1566 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1567 static const char *iwl_get_agg_tx_status(u16 status)
1568 {
1569 switch (status & AGG_TX_STATE_STATUS_MSK) {
1570 AGG_TX_STATE_(TRANSMITTED);
1571 AGG_TX_STATE_(UNDERRUN);
1572 AGG_TX_STATE_(BT_PRIO);
1573 AGG_TX_STATE_(FEW_BYTES);
1574 AGG_TX_STATE_(ABORT);
1575 AGG_TX_STATE_(LAST_SENT_TTL);
1576 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1577 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1578 AGG_TX_STATE_(SCD_QUERY);
1579 AGG_TX_STATE_(TEST_BAD_CRC32);
1580 AGG_TX_STATE_(RESPONSE);
1581 AGG_TX_STATE_(DUMP_TX);
1582 AGG_TX_STATE_(DELAY_TX);
1583 }
1584
1585 return "UNKNOWN";
1586 }
1587
1588 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1589 struct iwl_rx_packet *pkt)
1590 {
1591 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1592 struct agg_tx_status *frame_status =
1593 iwl_mvm_get_agg_status(mvm, tx_resp);
1594 int i;
1595
1596 for (i = 0; i < tx_resp->frame_count; i++) {
1597 u16 fstatus = le16_to_cpu(frame_status[i].status);
1598
1599 IWL_DEBUG_TX_REPLY(mvm,
1600 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1601 iwl_get_agg_tx_status(fstatus),
1602 fstatus & AGG_TX_STATE_STATUS_MSK,
1603 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1604 AGG_TX_STATE_TRY_CNT_POS,
1605 le16_to_cpu(frame_status[i].sequence));
1606 }
1607 }
1608 #else
1609 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1610 struct iwl_rx_packet *pkt)
1611 {}
1612 #endif /* CONFIG_IWLWIFI_DEBUG */
1613
1614 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1615 struct iwl_rx_packet *pkt)
1616 {
1617 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1618 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1619 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1620 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1621 struct iwl_mvm_sta *mvmsta;
1622 int queue = SEQ_TO_QUEUE(sequence);
1623
1624 if (WARN_ON_ONCE(queue < mvm->first_agg_queue &&
1625 (!iwl_mvm_is_dqa_supported(mvm) ||
1626 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))))
1627 return;
1628
1629 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1630 return;
1631
1632 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1633
1634 rcu_read_lock();
1635
1636 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1637
1638 if (!WARN_ON_ONCE(!mvmsta)) {
1639 mvmsta->tid_data[tid].rate_n_flags =
1640 le32_to_cpu(tx_resp->initial_rate);
1641 mvmsta->tid_data[tid].tx_time =
1642 le16_to_cpu(tx_resp->wireless_media_time);
1643 mvmsta->tid_data[tid].lq_color =
1644 (tx_resp->tlc_info & TX_RES_RATE_TABLE_COLOR_MSK) >>
1645 TX_RES_RATE_TABLE_COLOR_POS;
1646 }
1647
1648 rcu_read_unlock();
1649 }
1650
1651 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1652 {
1653 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1654 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1655
1656 if (tx_resp->frame_count == 1)
1657 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1658 else
1659 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1660 }
1661
1662 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1663 int txq, int index,
1664 struct ieee80211_tx_info *ba_info, u32 rate)
1665 {
1666 struct sk_buff_head reclaimed_skbs;
1667 struct iwl_mvm_tid_data *tid_data;
1668 struct ieee80211_sta *sta;
1669 struct iwl_mvm_sta *mvmsta;
1670 struct sk_buff *skb;
1671 int freed;
1672
1673 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1674 tid >= IWL_MAX_TID_COUNT,
1675 "sta_id %d tid %d", sta_id, tid))
1676 return;
1677
1678 rcu_read_lock();
1679
1680 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1681
1682 /* Reclaiming frames for a station that has been deleted ? */
1683 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1684 rcu_read_unlock();
1685 return;
1686 }
1687
1688 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1689 tid_data = &mvmsta->tid_data[tid];
1690
1691 if (tid_data->txq_id != txq) {
1692 IWL_ERR(mvm,
1693 "invalid BA notification: Q %d, tid %d\n",
1694 tid_data->txq_id, tid);
1695 rcu_read_unlock();
1696 return;
1697 }
1698
1699 spin_lock_bh(&mvmsta->lock);
1700
1701 __skb_queue_head_init(&reclaimed_skbs);
1702
1703 /*
1704 * Release all TFDs before the SSN, i.e. all TFDs in front of
1705 * block-ack window (we assume that they've been successfully
1706 * transmitted ... if not, it's too late anyway).
1707 */
1708 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1709
1710 tid_data->next_reclaimed = index;
1711
1712 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1713
1714 freed = 0;
1715
1716 /* pack lq color from tid_data along the reduced txp */
1717 ba_info->status.status_driver_data[0] =
1718 RS_DRV_DATA_PACK(tid_data->lq_color,
1719 ba_info->status.status_driver_data[0]);
1720 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1721
1722 skb_queue_walk(&reclaimed_skbs, skb) {
1723 struct ieee80211_hdr *hdr = (void *)skb->data;
1724 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1725
1726 if (ieee80211_is_data_qos(hdr->frame_control))
1727 freed++;
1728 else
1729 WARN_ON_ONCE(1);
1730
1731 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1732
1733 memset(&info->status, 0, sizeof(info->status));
1734 /* Packet was transmitted successfully, failures come as single
1735 * frames because before failing a frame the firmware transmits
1736 * it without aggregation at least once.
1737 */
1738 info->flags |= IEEE80211_TX_STAT_ACK;
1739
1740 /* this is the first skb we deliver in this batch */
1741 /* put the rate scaling data there */
1742 if (freed == 1) {
1743 info->flags |= IEEE80211_TX_STAT_AMPDU;
1744 memcpy(&info->status, &ba_info->status,
1745 sizeof(ba_info->status));
1746 iwl_mvm_hwrate_to_tx_status(rate, info);
1747 }
1748 }
1749
1750 spin_unlock_bh(&mvmsta->lock);
1751
1752 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1753 * possible (i.e. first MPDU in the aggregation wasn't acked)
1754 * Still it's important to update RS about sent vs. acked.
1755 */
1756 if (skb_queue_empty(&reclaimed_skbs)) {
1757 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1758
1759 if (mvmsta->vif)
1760 chanctx_conf =
1761 rcu_dereference(mvmsta->vif->chanctx_conf);
1762
1763 if (WARN_ON_ONCE(!chanctx_conf))
1764 goto out;
1765
1766 ba_info->band = chanctx_conf->def.chan->band;
1767 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1768
1769 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1770 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1771 }
1772
1773 out:
1774 rcu_read_unlock();
1775
1776 while (!skb_queue_empty(&reclaimed_skbs)) {
1777 skb = __skb_dequeue(&reclaimed_skbs);
1778 ieee80211_tx_status(mvm->hw, skb);
1779 }
1780 }
1781
1782 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1783 {
1784 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1785 int sta_id, tid, txq, index;
1786 struct ieee80211_tx_info ba_info = {};
1787 struct iwl_mvm_ba_notif *ba_notif;
1788 struct iwl_mvm_tid_data *tid_data;
1789 struct iwl_mvm_sta *mvmsta;
1790
1791 if (iwl_mvm_has_new_tx_api(mvm)) {
1792 struct iwl_mvm_compressed_ba_notif *ba_res =
1793 (void *)pkt->data;
1794
1795 sta_id = ba_res->sta_id;
1796 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1797 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1798 ba_info.status.tx_time =
1799 (u16)le32_to_cpu(ba_res->wireless_time);
1800 ba_info.status.status_driver_data[0] =
1801 (void *)(uintptr_t)ba_res->reduced_txp;
1802
1803 if (!le16_to_cpu(ba_res->tfd_cnt))
1804 goto out;
1805
1806 /*
1807 * TODO:
1808 * When supporting multi TID aggregations - we need to move
1809 * next_reclaimed to be per TXQ and not per TID or handle it
1810 * in a different way.
1811 * This will go together with SN and AddBA offload and cannot
1812 * be handled properly for now.
1813 */
1814 WARN_ON(le16_to_cpu(ba_res->ra_tid_cnt) != 1);
1815 tid = ba_res->ra_tid[0].tid;
1816 if (tid == IWL_MGMT_TID)
1817 tid = IWL_MAX_TID_COUNT;
1818 iwl_mvm_tx_reclaim(mvm, sta_id, tid,
1819 (int)(le16_to_cpu(ba_res->tfd[0].q_num)),
1820 le16_to_cpu(ba_res->tfd[0].tfd_index),
1821 &ba_info, le32_to_cpu(ba_res->tx_rate));
1822
1823 out:
1824 IWL_DEBUG_TX_REPLY(mvm,
1825 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1826 sta_id, le32_to_cpu(ba_res->flags),
1827 le16_to_cpu(ba_res->txed),
1828 le16_to_cpu(ba_res->done));
1829 return;
1830 }
1831
1832 ba_notif = (void *)pkt->data;
1833 sta_id = ba_notif->sta_id;
1834 tid = ba_notif->tid;
1835 /* "flow" corresponds to Tx queue */
1836 txq = le16_to_cpu(ba_notif->scd_flow);
1837 /* "ssn" is start of block-ack Tx window, corresponds to index
1838 * (in Tx queue's circular buffer) of first TFD/frame in window */
1839 index = le16_to_cpu(ba_notif->scd_ssn);
1840
1841 rcu_read_lock();
1842 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1843 if (WARN_ON_ONCE(!mvmsta)) {
1844 rcu_read_unlock();
1845 return;
1846 }
1847
1848 tid_data = &mvmsta->tid_data[tid];
1849
1850 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1851 ba_info.status.ampdu_len = ba_notif->txed;
1852 ba_info.status.tx_time = tid_data->tx_time;
1853 ba_info.status.status_driver_data[0] =
1854 (void *)(uintptr_t)ba_notif->reduced_txp;
1855
1856 rcu_read_unlock();
1857
1858 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1859 tid_data->rate_n_flags);
1860
1861 IWL_DEBUG_TX_REPLY(mvm,
1862 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1863 (u8 *)&ba_notif->sta_addr_lo32, ba_notif->sta_id);
1864
1865 IWL_DEBUG_TX_REPLY(mvm,
1866 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1867 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1868 le64_to_cpu(ba_notif->bitmap), txq, index,
1869 ba_notif->txed, ba_notif->txed_2_done);
1870
1871 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1872 ba_notif->reduced_txp);
1873 }
1874
1875 /*
1876 * Note that there are transports that buffer frames before they reach
1877 * the firmware. This means that after flush_tx_path is called, the
1878 * queue might not be empty. The race-free way to handle this is to:
1879 * 1) set the station as draining
1880 * 2) flush the Tx path
1881 * 3) wait for the transport queues to be empty
1882 */
1883 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1884 {
1885 int ret;
1886 struct iwl_tx_path_flush_cmd flush_cmd = {
1887 .queues_ctl = cpu_to_le32(tfd_msk),
1888 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1889 };
1890
1891 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1892 sizeof(flush_cmd), &flush_cmd);
1893 if (ret)
1894 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1895 return ret;
1896 }