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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 u16 offload_assist)
110 {
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 u16 offload_assist = 0;
211 u8 ac;
212
213 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
214 tx_flags |= TX_CMD_FLG_ACK;
215 else
216 tx_flags &= ~TX_CMD_FLG_ACK;
217
218 if (ieee80211_is_probe_resp(fc))
219 tx_flags |= TX_CMD_FLG_TSF;
220
221 if (ieee80211_has_morefrags(fc))
222 tx_flags |= TX_CMD_FLG_MORE_FRAG;
223
224 if (ieee80211_is_data_qos(fc)) {
225 u8 *qc = ieee80211_get_qos_ctl(hdr);
226 tx_cmd->tid_tspec = qc[0] & 0xf;
227 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
228 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
229 offload_assist |= 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 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
295 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
296
297 tx_cmd->offload_assist |=
298 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info,
299 offload_assist));
300 }
301
302 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
303 struct ieee80211_tx_info *info,
304 struct ieee80211_sta *sta)
305 {
306 int rate_idx;
307 u8 rate_plcp;
308 u32 rate_flags;
309
310 /* HT rate doesn't make sense for a non data frame */
311 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
312 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n",
313 info->control.rates[0].flags,
314 info->control.rates[0].idx);
315
316 rate_idx = info->control.rates[0].idx;
317 /* if the rate isn't a well known legacy rate, take the lowest one */
318 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
319 rate_idx = rate_lowest_index(
320 &mvm->nvm_data->bands[info->band], sta);
321
322 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
323 if (info->band == NL80211_BAND_5GHZ)
324 rate_idx += IWL_FIRST_OFDM_RATE;
325
326 /* For 2.4 GHZ band, check that there is no need to remap */
327 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
328
329 /* Get PLCP rate for tx_cmd->rate_n_flags */
330 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
331
332 if (info->band == NL80211_BAND_2GHZ &&
333 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
334 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
335 else
336 rate_flags =
337 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
338
339 /* Set CCK flag as needed */
340 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
341 rate_flags |= RATE_MCS_CCK_MSK;
342
343 return (u32)rate_plcp | rate_flags;
344 }
345
346 /*
347 * Sets the fields in the Tx cmd that are rate related
348 */
349 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
350 struct ieee80211_tx_info *info,
351 struct ieee80211_sta *sta, __le16 fc)
352 {
353 /* Set retry limit on RTS packets */
354 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
355
356 /* Set retry limit on DATA packets and Probe Responses*/
357 if (ieee80211_is_probe_resp(fc)) {
358 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
359 tx_cmd->rts_retry_limit =
360 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
361 } else if (ieee80211_is_back_req(fc)) {
362 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
363 } else {
364 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
365 }
366
367 /*
368 * for data packets, rate info comes from the table inside the fw. This
369 * table is controlled by LINK_QUALITY commands
370 */
371
372 if (ieee80211_is_data(fc) && sta) {
373 tx_cmd->initial_rate_index = 0;
374 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
375 return;
376 } else if (ieee80211_is_back_req(fc)) {
377 tx_cmd->tx_flags |=
378 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
379 }
380
381 mvm->mgmt_last_antenna_idx =
382 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
383 mvm->mgmt_last_antenna_idx);
384
385 /* Set the rate in the TX cmd */
386 tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta));
387 }
388
389 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
390 u8 *crypto_hdr)
391 {
392 struct ieee80211_key_conf *keyconf = info->control.hw_key;
393 u64 pn;
394
395 pn = atomic64_inc_return(&keyconf->tx_pn);
396 crypto_hdr[0] = pn;
397 crypto_hdr[2] = 0;
398 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
399 crypto_hdr[1] = pn >> 8;
400 crypto_hdr[4] = pn >> 16;
401 crypto_hdr[5] = pn >> 24;
402 crypto_hdr[6] = pn >> 32;
403 crypto_hdr[7] = pn >> 40;
404 }
405
406 /*
407 * Sets the fields in the Tx cmd that are crypto related
408 */
409 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
410 struct ieee80211_tx_info *info,
411 struct iwl_tx_cmd *tx_cmd,
412 struct sk_buff *skb_frag,
413 int hdrlen)
414 {
415 struct ieee80211_key_conf *keyconf = info->control.hw_key;
416 u8 *crypto_hdr = skb_frag->data + hdrlen;
417 u64 pn;
418
419 switch (keyconf->cipher) {
420 case WLAN_CIPHER_SUITE_CCMP:
421 case WLAN_CIPHER_SUITE_CCMP_256:
422 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
423 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
424 break;
425
426 case WLAN_CIPHER_SUITE_TKIP:
427 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
428 pn = atomic64_inc_return(&keyconf->tx_pn);
429 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
430 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
431 break;
432
433 case WLAN_CIPHER_SUITE_WEP104:
434 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
435 /* fall through */
436 case WLAN_CIPHER_SUITE_WEP40:
437 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
438 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
439 TX_CMD_SEC_WEP_KEY_IDX_MSK);
440
441 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
442 break;
443 case WLAN_CIPHER_SUITE_GCMP:
444 case WLAN_CIPHER_SUITE_GCMP_256:
445 /* TODO: Taking the key from the table might introduce a race
446 * when PTK rekeying is done, having an old packets with a PN
447 * based on the old key but the message encrypted with a new
448 * one.
449 * Need to handle this.
450 */
451 tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TX_CMD_SEC_KEY_FROM_TABLE;
452 tx_cmd->key[0] = keyconf->hw_key_idx;
453 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
454 break;
455 default:
456 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
457 }
458 }
459
460 /*
461 * Allocates and sets the Tx cmd the driver data pointers in the skb
462 */
463 static struct iwl_device_cmd *
464 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
465 struct ieee80211_tx_info *info, int hdrlen,
466 struct ieee80211_sta *sta, u8 sta_id)
467 {
468 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
469 struct iwl_device_cmd *dev_cmd;
470 struct iwl_tx_cmd *tx_cmd;
471
472 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
473
474 if (unlikely(!dev_cmd))
475 return NULL;
476
477 /* Make sure we zero enough of dev_cmd */
478 BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd));
479
480 memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd));
481 dev_cmd->hdr.cmd = TX_CMD;
482
483 if (iwl_mvm_has_new_tx_api(mvm)) {
484 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
485 u16 offload_assist = 0;
486
487 if (ieee80211_is_data_qos(hdr->frame_control)) {
488 u8 *qc = ieee80211_get_qos_ctl(hdr);
489
490 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
491 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
492 }
493
494 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info,
495 offload_assist);
496
497 /* padding is inserted later in transport */
498 if (ieee80211_hdrlen(hdr->frame_control) % 4 &&
499 !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
500 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
501
502 cmd->offload_assist |= cpu_to_le16(offload_assist);
503
504 /* Total # bytes to be transmitted */
505 cmd->len = cpu_to_le16((u16)skb->len);
506
507 /* Copy MAC header from skb into command buffer */
508 memcpy(cmd->hdr, hdr, hdrlen);
509
510 if (!info->control.hw_key)
511 cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_ENCRYPT_DIS);
512
513 /* For data packets rate info comes from the fw */
514 if (ieee80211_is_data(hdr->frame_control) && sta)
515 goto out;
516
517 cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_CMD_RATE);
518 cmd->rate_n_flags =
519 cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta));
520
521 goto out;
522 }
523
524 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
525
526 if (info->control.hw_key)
527 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
528
529 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
530
531 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
532
533 /* Copy MAC header from skb into command buffer */
534 memcpy(tx_cmd->hdr, hdr, hdrlen);
535
536 out:
537 return dev_cmd;
538 }
539
540 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
541 struct iwl_device_cmd *cmd)
542 {
543 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
544
545 memset(&skb_info->status, 0, sizeof(skb_info->status));
546 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
547
548 skb_info->driver_data[1] = cmd;
549 }
550
551 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
552 struct ieee80211_tx_info *info, __le16 fc)
553 {
554 struct iwl_mvm_vif *mvmvif;
555
556 if (!iwl_mvm_is_dqa_supported(mvm))
557 return info->hw_queue;
558
559 mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif);
560
561 switch (info->control.vif->type) {
562 case NL80211_IFTYPE_AP:
563 case NL80211_IFTYPE_ADHOC:
564 /*
565 * Handle legacy hostapd as well, where station will be added
566 * only just before sending the association response.
567 * Also take care of the case where we send a deauth to a
568 * station that we don't have, or similarly an association
569 * response (with non-success status) for a station we can't
570 * accept.
571 * Also, disassociate frames might happen, particular with
572 * reason 7 ("Class 3 frame received from nonassociated STA").
573 */
574 if (ieee80211_is_probe_resp(fc) || ieee80211_is_auth(fc) ||
575 ieee80211_is_deauth(fc) || ieee80211_is_assoc_resp(fc) ||
576 ieee80211_is_disassoc(fc))
577 return mvm->probe_queue;
578 if (info->hw_queue == info->control.vif->cab_queue)
579 return mvmvif->cab_queue;
580
581 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
582 "fc=0x%02x", le16_to_cpu(fc));
583 return mvm->probe_queue;
584 case NL80211_IFTYPE_P2P_DEVICE:
585 if (ieee80211_is_mgmt(fc))
586 return mvm->p2p_dev_queue;
587 if (info->hw_queue == info->control.vif->cab_queue)
588 return mvmvif->cab_queue;
589
590 WARN_ON_ONCE(1);
591 return mvm->p2p_dev_queue;
592 default:
593 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
594 return -1;
595 }
596 }
597
598 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
599 {
600 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
601 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
602 struct ieee80211_tx_info info;
603 struct iwl_device_cmd *dev_cmd;
604 u8 sta_id;
605 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
606 int queue;
607
608 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
609 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
610 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
611 * and hence needs to be sent on the aux queue
612 */
613 if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
614 skb_info->control.vif->type == NL80211_IFTYPE_STATION)
615 skb_info->hw_queue = mvm->aux_queue;
616
617 memcpy(&info, skb->cb, sizeof(info));
618
619 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
620 return -1;
621
622 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
623 (!info.control.vif ||
624 info.hw_queue != info.control.vif->cab_queue)))
625 return -1;
626
627 queue = info.hw_queue;
628
629 /*
630 * If the interface on which the frame is sent is the P2P_DEVICE
631 * or an AP/GO interface use the broadcast station associated
632 * with it; otherwise if the interface is a managed interface
633 * use the AP station associated with it for multicast traffic
634 * (this is not possible for unicast packets as a TLDS discovery
635 * response are sent without a station entry); otherwise use the
636 * AUX station.
637 */
638 sta_id = mvm->aux_sta.sta_id;
639 if (info.control.vif) {
640 struct iwl_mvm_vif *mvmvif =
641 iwl_mvm_vif_from_mac80211(info.control.vif);
642
643 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
644 info.control.vif->type == NL80211_IFTYPE_AP ||
645 info.control.vif->type == NL80211_IFTYPE_ADHOC) {
646 sta_id = mvmvif->bcast_sta.sta_id;
647 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info,
648 hdr->frame_control);
649 if (queue < 0)
650 return -1;
651 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
652 is_multicast_ether_addr(hdr->addr1)) {
653 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id);
654
655 if (ap_sta_id != IWL_MVM_INVALID_STA)
656 sta_id = ap_sta_id;
657 } else if (iwl_mvm_is_dqa_supported(mvm) &&
658 info.control.vif->type == NL80211_IFTYPE_MONITOR) {
659 queue = mvm->aux_queue;
660 }
661 }
662
663 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
664
665 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
666 if (!dev_cmd)
667 return -1;
668
669 /* From now on, we cannot access info->control */
670 iwl_mvm_skb_prepare_status(skb, dev_cmd);
671
672 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
673 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
674 return -1;
675 }
676
677 /*
678 * Increase the pending frames counter, so that later when a reply comes
679 * in and the counter is decreased - we don't start getting negative
680 * values.
681 * Note that we don't need to make sure it isn't agg'd, since we're
682 * TXing non-sta
683 * For DQA mode - we shouldn't increase it though
684 */
685 if (!iwl_mvm_is_dqa_supported(mvm))
686 atomic_inc(&mvm->pending_frames[sta_id]);
687
688 return 0;
689 }
690
691 #ifdef CONFIG_INET
692 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
693 struct ieee80211_tx_info *info,
694 struct ieee80211_sta *sta,
695 struct sk_buff_head *mpdus_skb)
696 {
697 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
698 struct ieee80211_hdr *hdr = (void *)skb->data;
699 unsigned int mss = skb_shinfo(skb)->gso_size;
700 struct sk_buff *tmp, *next;
701 char cb[sizeof(skb->cb)];
702 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
703 bool ipv4 = (skb->protocol == htons(ETH_P_IP));
704 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
705 u16 snap_ip_tcp, pad, i = 0;
706 unsigned int dbg_max_amsdu_len;
707 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG;
708 u8 *qc, tid, txf;
709
710 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
711 tcp_hdrlen(skb);
712
713 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len);
714
715 if (!sta->max_amsdu_len ||
716 !ieee80211_is_data_qos(hdr->frame_control) ||
717 (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) {
718 num_subframes = 1;
719 pad = 0;
720 goto segment;
721 }
722
723 qc = ieee80211_get_qos_ctl(hdr);
724 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
725 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
726 return -EINVAL;
727
728 /*
729 * Do not build AMSDU for IPv6 with extension headers.
730 * ask stack to segment and checkum the generated MPDUs for us.
731 */
732 if (skb->protocol == htons(ETH_P_IPV6) &&
733 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
734 IPPROTO_TCP) {
735 num_subframes = 1;
736 pad = 0;
737 netdev_features &= ~NETIF_F_CSUM_MASK;
738 goto segment;
739 }
740
741 /*
742 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
743 * during an BA session.
744 */
745 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
746 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) {
747 num_subframes = 1;
748 pad = 0;
749 goto segment;
750 }
751
752 max_amsdu_len = sta->max_amsdu_len;
753
754 /* the Tx FIFO to which this A-MSDU will be routed */
755 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
756
757 /*
758 * Don't send an AMSDU that will be longer than the TXF.
759 * Add a security margin of 256 for the TX command + headers.
760 * We also want to have the start of the next packet inside the
761 * fifo to be able to send bursts.
762 */
763 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
764 mvm->smem_cfg.lmac[0].txfifo_size[txf] - 256);
765
766 if (unlikely(dbg_max_amsdu_len))
767 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
768 dbg_max_amsdu_len);
769
770 /*
771 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
772 * supported. This is a spec requirement (IEEE 802.11-2015
773 * section 8.7.3 NOTE 3).
774 */
775 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
776 !sta->vht_cap.vht_supported)
777 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
778
779 /* Sub frame header + SNAP + IP header + TCP header + MSS */
780 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
781 pad = (4 - subf_len) & 0x3;
782
783 /*
784 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
785 * N * subf_len + (N - 1) * pad.
786 */
787 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
788 if (num_subframes > 1)
789 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
790
791 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
792 tcp_hdrlen(skb) + skb->data_len;
793
794 /*
795 * Make sure we have enough TBs for the A-MSDU:
796 * 2 for each subframe
797 * 1 more for each fragment
798 * 1 more for the potential data in the header
799 */
800 num_subframes =
801 min_t(unsigned int, num_subframes,
802 (mvm->trans->max_skb_frags - 1 -
803 skb_shinfo(skb)->nr_frags) / 2);
804
805 /* This skb fits in one single A-MSDU */
806 if (num_subframes * mss >= tcp_payload_len) {
807 __skb_queue_tail(mpdus_skb, skb);
808 return 0;
809 }
810
811 /*
812 * Trick the segmentation function to make it
813 * create SKBs that can fit into one A-MSDU.
814 */
815 segment:
816 skb_shinfo(skb)->gso_size = num_subframes * mss;
817 memcpy(cb, skb->cb, sizeof(cb));
818
819 next = skb_gso_segment(skb, netdev_features);
820 skb_shinfo(skb)->gso_size = mss;
821 if (WARN_ON_ONCE(IS_ERR(next)))
822 return -EINVAL;
823 else if (next)
824 consume_skb(skb);
825
826 while (next) {
827 tmp = next;
828 next = tmp->next;
829
830 memcpy(tmp->cb, cb, sizeof(tmp->cb));
831 /*
832 * Compute the length of all the data added for the A-MSDU.
833 * This will be used to compute the length to write in the TX
834 * command. We have: SNAP + IP + TCP for n -1 subframes and
835 * ETH header for n subframes.
836 */
837 tcp_payload_len = skb_tail_pointer(tmp) -
838 skb_transport_header(tmp) -
839 tcp_hdrlen(tmp) + tmp->data_len;
840
841 if (ipv4)
842 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
843
844 if (tcp_payload_len > mss) {
845 skb_shinfo(tmp)->gso_size = mss;
846 } else {
847 if (ieee80211_is_data_qos(hdr->frame_control)) {
848 qc = ieee80211_get_qos_ctl((void *)tmp->data);
849
850 if (ipv4)
851 ip_send_check(ip_hdr(tmp));
852 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
853 }
854 skb_shinfo(tmp)->gso_size = 0;
855 }
856
857 tmp->prev = NULL;
858 tmp->next = NULL;
859
860 __skb_queue_tail(mpdus_skb, tmp);
861 i++;
862 }
863
864 return 0;
865 }
866 #else /* CONFIG_INET */
867 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
868 struct ieee80211_tx_info *info,
869 struct ieee80211_sta *sta,
870 struct sk_buff_head *mpdus_skb)
871 {
872 /* Impossible to get TSO with CONFIG_INET */
873 WARN_ON(1);
874
875 return -1;
876 }
877 #endif
878
879 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
880 struct iwl_mvm_sta *mvm_sta, u8 tid,
881 struct sk_buff *skb)
882 {
883 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
884 u8 mac_queue = info->hw_queue;
885 struct sk_buff_head *deferred_tx_frames;
886
887 lockdep_assert_held(&mvm_sta->lock);
888
889 mvm_sta->deferred_traffic_tid_map |= BIT(tid);
890 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);
891
892 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;
893
894 skb_queue_tail(deferred_tx_frames, skb);
895
896 /*
897 * The first deferred frame should've stopped the MAC queues, so we
898 * should never get a second deferred frame for the RA/TID.
899 */
900 if (!WARN(skb_queue_len(deferred_tx_frames) != 1,
901 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid,
902 skb_queue_len(deferred_tx_frames))) {
903 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
904 schedule_work(&mvm->add_stream_wk);
905 }
906 }
907
908 /* Check if there are any timed-out TIDs on a given shared TXQ */
909 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
910 {
911 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
912 unsigned long now = jiffies;
913 int tid;
914
915 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
916 return false;
917
918 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
919 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
920 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
921 return true;
922 }
923
924 return false;
925 }
926
927 /*
928 * Sets the fields in the Tx cmd that are crypto related
929 */
930 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
931 struct ieee80211_tx_info *info,
932 struct ieee80211_sta *sta)
933 {
934 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
935 struct iwl_mvm_sta *mvmsta;
936 struct iwl_device_cmd *dev_cmd;
937 __le16 fc;
938 u16 seq_number = 0;
939 u8 tid = IWL_MAX_TID_COUNT;
940 u16 txq_id = info->hw_queue;
941 bool is_ampdu = false;
942 int hdrlen;
943
944 mvmsta = iwl_mvm_sta_from_mac80211(sta);
945 fc = hdr->frame_control;
946 hdrlen = ieee80211_hdrlen(fc);
947
948 if (WARN_ON_ONCE(!mvmsta))
949 return -1;
950
951 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
952 return -1;
953
954 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
955 sta, mvmsta->sta_id);
956 if (!dev_cmd)
957 goto drop;
958
959 /*
960 * we handle that entirely ourselves -- for uAPSD the firmware
961 * will always send a notification, and for PS-Poll responses
962 * we'll notify mac80211 when getting frame status
963 */
964 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
965
966 spin_lock(&mvmsta->lock);
967
968 /* nullfunc frames should go to the MGMT queue regardless of QOS,
969 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
970 * assignment of MGMT TID
971 */
972 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
973 u8 *qc = NULL;
974 qc = ieee80211_get_qos_ctl(hdr);
975 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
976 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
977 goto drop_unlock_sta;
978
979 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
980 if (WARN_ON_ONCE(is_ampdu &&
981 mvmsta->tid_data[tid].state != IWL_AGG_ON))
982 goto drop_unlock_sta;
983
984 seq_number = mvmsta->tid_data[tid].seq_number;
985 seq_number &= IEEE80211_SCTL_SEQ;
986
987 if (!iwl_mvm_has_new_tx_api(mvm)) {
988 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
989
990 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
991 hdr->seq_ctrl |= cpu_to_le16(seq_number);
992 /* update the tx_cmd hdr as it was already copied */
993 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
994 }
995 }
996
997 if (iwl_mvm_is_dqa_supported(mvm) || is_ampdu)
998 txq_id = mvmsta->tid_data[tid].txq_id;
999
1000 if (sta->tdls && !iwl_mvm_is_dqa_supported(mvm)) {
1001 /* default to TID 0 for non-QoS packets */
1002 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
1003
1004 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
1005 }
1006
1007 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1008
1009 /* Check if TXQ needs to be allocated or re-activated */
1010 if (unlikely(txq_id == IWL_MVM_INVALID_QUEUE ||
1011 !mvmsta->tid_data[tid].is_tid_active) &&
1012 iwl_mvm_is_dqa_supported(mvm)) {
1013 /* If TXQ needs to be allocated... */
1014 if (txq_id == IWL_MVM_INVALID_QUEUE) {
1015 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);
1016
1017 /*
1018 * The frame is now deferred, and the worker scheduled
1019 * will re-allocate it, so we can free it for now.
1020 */
1021 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1022 spin_unlock(&mvmsta->lock);
1023 return 0;
1024 }
1025
1026 /* queue should always be active in new TX path */
1027 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
1028
1029 /* If we are here - TXQ exists and needs to be re-activated */
1030 spin_lock(&mvm->queue_info_lock);
1031 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1032 mvmsta->tid_data[tid].is_tid_active = true;
1033 spin_unlock(&mvm->queue_info_lock);
1034
1035 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n",
1036 txq_id);
1037 }
1038
1039 if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) {
1040 /* Keep track of the time of the last frame for this RA/TID */
1041 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1042
1043 /*
1044 * If we have timed-out TIDs - schedule the worker that will
1045 * reconfig the queues and update them
1046 *
1047 * Note that the mvm->queue_info_lock isn't being taken here in
1048 * order to not serialize the TX flow. This isn't dangerous
1049 * because scheduling mvm->add_stream_wk can't ruin the state,
1050 * and if we DON'T schedule it due to some race condition then
1051 * next TX we get here we will.
1052 */
1053 if (unlikely(mvm->queue_info[txq_id].status ==
1054 IWL_MVM_QUEUE_SHARED &&
1055 iwl_mvm_txq_should_update(mvm, txq_id)))
1056 schedule_work(&mvm->add_stream_wk);
1057 }
1058
1059 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
1060 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
1061
1062 /* From now on, we cannot access info->control */
1063 iwl_mvm_skb_prepare_status(skb, dev_cmd);
1064
1065 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1066 goto drop_unlock_sta;
1067
1068 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1069 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1070
1071 spin_unlock(&mvmsta->lock);
1072
1073 /* Increase pending frames count if this isn't AMPDU or DQA queue */
1074 if (!iwl_mvm_is_dqa_supported(mvm) && !is_ampdu)
1075 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
1076
1077 return 0;
1078
1079 drop_unlock_sta:
1080 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1081 spin_unlock(&mvmsta->lock);
1082 drop:
1083 return -1;
1084 }
1085
1086 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
1087 struct ieee80211_sta *sta)
1088 {
1089 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1090 struct ieee80211_tx_info info;
1091 struct sk_buff_head mpdus_skbs;
1092 unsigned int payload_len;
1093 int ret;
1094
1095 if (WARN_ON_ONCE(!mvmsta))
1096 return -1;
1097
1098 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1099 return -1;
1100
1101 memcpy(&info, skb->cb, sizeof(info));
1102
1103 if (!skb_is_gso(skb))
1104 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1105
1106 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1107 tcp_hdrlen(skb) + skb->data_len;
1108
1109 if (payload_len <= skb_shinfo(skb)->gso_size)
1110 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1111
1112 __skb_queue_head_init(&mpdus_skbs);
1113
1114 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1115 if (ret)
1116 return ret;
1117
1118 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1119 return ret;
1120
1121 while (!skb_queue_empty(&mpdus_skbs)) {
1122 skb = __skb_dequeue(&mpdus_skbs);
1123
1124 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1125 if (ret) {
1126 __skb_queue_purge(&mpdus_skbs);
1127 return ret;
1128 }
1129 }
1130
1131 return 0;
1132 }
1133
1134 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1135 struct ieee80211_sta *sta, u8 tid)
1136 {
1137 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1138 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1139 struct ieee80211_vif *vif = mvmsta->vif;
1140 u16 normalized_ssn;
1141
1142 lockdep_assert_held(&mvmsta->lock);
1143
1144 if ((tid_data->state == IWL_AGG_ON ||
1145 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA ||
1146 iwl_mvm_is_dqa_supported(mvm)) &&
1147 iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1148 /*
1149 * Now that this aggregation or DQA queue is empty tell
1150 * mac80211 so it knows we no longer have frames buffered for
1151 * the station on this TID (for the TIM bitmap calculation.)
1152 */
1153 ieee80211_sta_set_buffered(sta, tid, false);
1154 }
1155
1156 /*
1157 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
1158 * to align the wrap around of ssn so we compare relevant values.
1159 */
1160 normalized_ssn = tid_data->ssn;
1161 if (mvm->trans->cfg->gen2)
1162 normalized_ssn &= 0xff;
1163
1164 if (normalized_ssn != tid_data->next_reclaimed)
1165 return;
1166
1167 switch (tid_data->state) {
1168 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1169 IWL_DEBUG_TX_QUEUES(mvm,
1170 "Can continue addBA flow ssn = next_recl = %d\n",
1171 tid_data->next_reclaimed);
1172 tid_data->state = IWL_AGG_STARTING;
1173 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1174 break;
1175
1176 case IWL_EMPTYING_HW_QUEUE_DELBA:
1177 IWL_DEBUG_TX_QUEUES(mvm,
1178 "Can continue DELBA flow ssn = next_recl = %d\n",
1179 tid_data->next_reclaimed);
1180 if (!iwl_mvm_is_dqa_supported(mvm)) {
1181 u8 mac80211_ac = tid_to_mac80211_ac[tid];
1182
1183 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
1184 vif->hw_queue[mac80211_ac], tid,
1185 CMD_ASYNC);
1186 }
1187 tid_data->state = IWL_AGG_OFF;
1188 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1189 break;
1190
1191 default:
1192 break;
1193 }
1194 }
1195
1196 #ifdef CONFIG_IWLWIFI_DEBUG
1197 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1198 {
1199 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1200 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1201
1202 switch (status & TX_STATUS_MSK) {
1203 case TX_STATUS_SUCCESS:
1204 return "SUCCESS";
1205 TX_STATUS_POSTPONE(DELAY);
1206 TX_STATUS_POSTPONE(FEW_BYTES);
1207 TX_STATUS_POSTPONE(BT_PRIO);
1208 TX_STATUS_POSTPONE(QUIET_PERIOD);
1209 TX_STATUS_POSTPONE(CALC_TTAK);
1210 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1211 TX_STATUS_FAIL(SHORT_LIMIT);
1212 TX_STATUS_FAIL(LONG_LIMIT);
1213 TX_STATUS_FAIL(UNDERRUN);
1214 TX_STATUS_FAIL(DRAIN_FLOW);
1215 TX_STATUS_FAIL(RFKILL_FLUSH);
1216 TX_STATUS_FAIL(LIFE_EXPIRE);
1217 TX_STATUS_FAIL(DEST_PS);
1218 TX_STATUS_FAIL(HOST_ABORTED);
1219 TX_STATUS_FAIL(BT_RETRY);
1220 TX_STATUS_FAIL(STA_INVALID);
1221 TX_STATUS_FAIL(FRAG_DROPPED);
1222 TX_STATUS_FAIL(TID_DISABLE);
1223 TX_STATUS_FAIL(FIFO_FLUSHED);
1224 TX_STATUS_FAIL(SMALL_CF_POLL);
1225 TX_STATUS_FAIL(FW_DROP);
1226 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1227 }
1228
1229 return "UNKNOWN";
1230
1231 #undef TX_STATUS_FAIL
1232 #undef TX_STATUS_POSTPONE
1233 }
1234 #endif /* CONFIG_IWLWIFI_DEBUG */
1235
1236 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1237 enum nl80211_band band,
1238 struct ieee80211_tx_rate *r)
1239 {
1240 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1241 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1242 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1243 case RATE_MCS_CHAN_WIDTH_20:
1244 break;
1245 case RATE_MCS_CHAN_WIDTH_40:
1246 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1247 break;
1248 case RATE_MCS_CHAN_WIDTH_80:
1249 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1250 break;
1251 case RATE_MCS_CHAN_WIDTH_160:
1252 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1253 break;
1254 }
1255 if (rate_n_flags & RATE_MCS_SGI_MSK)
1256 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1257 if (rate_n_flags & RATE_MCS_HT_MSK) {
1258 r->flags |= IEEE80211_TX_RC_MCS;
1259 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1260 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1261 ieee80211_rate_set_vht(
1262 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1263 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1264 RATE_VHT_MCS_NSS_POS) + 1);
1265 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1266 } else {
1267 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1268 band);
1269 }
1270 }
1271
1272 /**
1273 * translate ucode response to mac80211 tx status control values
1274 */
1275 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1276 struct ieee80211_tx_info *info)
1277 {
1278 struct ieee80211_tx_rate *r = &info->status.rates[0];
1279
1280 info->status.antenna =
1281 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1282 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1283 }
1284
1285 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1286 u32 status)
1287 {
1288 struct iwl_fw_dbg_trigger_tlv *trig;
1289 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1290 int i;
1291
1292 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
1293 return;
1294
1295 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
1296 status_trig = (void *)trig->data;
1297
1298 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
1299 return;
1300
1301 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1302 /* don't collect on status 0 */
1303 if (!status_trig->statuses[i].status)
1304 break;
1305
1306 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1307 continue;
1308
1309 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
1310 "Tx status %d was received",
1311 status & TX_STATUS_MSK);
1312 break;
1313 }
1314 }
1315
1316 /**
1317 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1318 * @tx_resp: the Tx response from the fw (agg or non-agg)
1319 *
1320 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1321 * it can't know that everything will go well until the end of the AMPDU, it
1322 * can't know in advance the number of MPDUs that will be sent in the current
1323 * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1324 * Hence, it can't know in advance what the SSN of the SCD will be at the end
1325 * of the batch. This is why the SSN of the SCD is written at the end of the
1326 * whole struct at a variable offset. This function knows how to cope with the
1327 * variable offset and returns the SSN of the SCD.
1328 */
1329 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1330 struct iwl_mvm_tx_resp *tx_resp)
1331 {
1332 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1333 tx_resp->frame_count) & 0xfff;
1334 }
1335
1336 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1337 struct iwl_rx_packet *pkt)
1338 {
1339 struct ieee80211_sta *sta;
1340 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1341 int txq_id = SEQ_TO_QUEUE(sequence);
1342 /* struct iwl_mvm_tx_resp_v3 is almost the same */
1343 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1344 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1345 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1346 struct agg_tx_status *agg_status =
1347 iwl_mvm_get_agg_status(mvm, tx_resp);
1348 u32 status = le16_to_cpu(agg_status->status);
1349 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1350 struct iwl_mvm_sta *mvmsta;
1351 struct sk_buff_head skbs;
1352 u8 skb_freed = 0;
1353 u8 lq_color;
1354 u16 next_reclaimed, seq_ctl;
1355 bool is_ndp = false;
1356
1357 __skb_queue_head_init(&skbs);
1358
1359 if (iwl_mvm_has_new_tx_api(mvm))
1360 txq_id = le16_to_cpu(tx_resp->tx_queue);
1361
1362 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1363
1364 /* we can free until ssn % q.n_bd not inclusive */
1365 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1366
1367 while (!skb_queue_empty(&skbs)) {
1368 struct sk_buff *skb = __skb_dequeue(&skbs);
1369 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1370
1371 skb_freed++;
1372
1373 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1374
1375 memset(&info->status, 0, sizeof(info->status));
1376
1377 /* inform mac80211 about what happened with the frame */
1378 switch (status & TX_STATUS_MSK) {
1379 case TX_STATUS_SUCCESS:
1380 case TX_STATUS_DIRECT_DONE:
1381 info->flags |= IEEE80211_TX_STAT_ACK;
1382 break;
1383 case TX_STATUS_FAIL_DEST_PS:
1384 /* In DQA, the FW should have stopped the queue and not
1385 * return this status
1386 */
1387 WARN_ON(iwl_mvm_is_dqa_supported(mvm));
1388 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1389 break;
1390 default:
1391 break;
1392 }
1393
1394 iwl_mvm_tx_status_check_trigger(mvm, status);
1395
1396 info->status.rates[0].count = tx_resp->failure_frame + 1;
1397 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1398 info);
1399 info->status.status_driver_data[1] =
1400 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1401
1402 /* Single frame failure in an AMPDU queue => send BAR */
1403 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1404 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1405 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
1406 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1407 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1408
1409 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1410 if (status != TX_STATUS_SUCCESS) {
1411 struct ieee80211_hdr *hdr = (void *)skb->data;
1412 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1413 }
1414
1415 if (unlikely(!seq_ctl)) {
1416 struct ieee80211_hdr *hdr = (void *)skb->data;
1417
1418 /*
1419 * If it is an NDP, we can't update next_reclaim since
1420 * its sequence control is 0. Note that for that same
1421 * reason, NDPs are never sent to A-MPDU'able queues
1422 * so that we can never have more than one freed frame
1423 * for a single Tx resonse (see WARN_ON below).
1424 */
1425 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1426 is_ndp = true;
1427 }
1428
1429 /*
1430 * TODO: this is not accurate if we are freeing more than one
1431 * packet.
1432 */
1433 info->status.tx_time =
1434 le16_to_cpu(tx_resp->wireless_media_time);
1435 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1436 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1437 info->status.status_driver_data[0] =
1438 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1439
1440 ieee80211_tx_status(mvm->hw, skb);
1441 }
1442
1443 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue) {
1444 /* If this is an aggregation queue, we use the ssn since:
1445 * ssn = wifi seq_num % 256.
1446 * The seq_ctl is the sequence control of the packet to which
1447 * this Tx response relates. But if there is a hole in the
1448 * bitmap of the BA we received, this Tx response may allow to
1449 * reclaim the hole and all the subsequent packets that were
1450 * already acked. In that case, seq_ctl != ssn, and the next
1451 * packet to be reclaimed will be ssn and not seq_ctl. In that
1452 * case, several packets will be reclaimed even if
1453 * frame_count = 1.
1454 *
1455 * The ssn is the index (% 256) of the latest packet that has
1456 * treated (acked / dropped) + 1.
1457 */
1458 next_reclaimed = ssn;
1459 } else {
1460 /* The next packet to be reclaimed is the one after this one */
1461 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
1462 }
1463
1464 IWL_DEBUG_TX_REPLY(mvm,
1465 "TXQ %d status %s (0x%08x)\n",
1466 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1467
1468 IWL_DEBUG_TX_REPLY(mvm,
1469 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1470 le32_to_cpu(tx_resp->initial_rate),
1471 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1472 ssn, next_reclaimed, seq_ctl);
1473
1474 rcu_read_lock();
1475
1476 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1477 /*
1478 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1479 * the firmware while we still have packets for it in the Tx queues.
1480 */
1481 if (WARN_ON_ONCE(!sta))
1482 goto out;
1483
1484 if (!IS_ERR(sta)) {
1485 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1486
1487 if (tid != IWL_TID_NON_QOS && tid != IWL_MGMT_TID) {
1488 struct iwl_mvm_tid_data *tid_data =
1489 &mvmsta->tid_data[tid];
1490 bool send_eosp_ndp = false;
1491
1492 spin_lock_bh(&mvmsta->lock);
1493
1494 if (!is_ndp) {
1495 tid_data->next_reclaimed = next_reclaimed;
1496 IWL_DEBUG_TX_REPLY(mvm,
1497 "Next reclaimed packet:%d\n",
1498 next_reclaimed);
1499 } else {
1500 IWL_DEBUG_TX_REPLY(mvm,
1501 "NDP - don't update next_reclaimed\n");
1502 }
1503
1504 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1505
1506 if (mvmsta->sleep_tx_count) {
1507 mvmsta->sleep_tx_count--;
1508 if (mvmsta->sleep_tx_count &&
1509 !iwl_mvm_tid_queued(mvm, tid_data)) {
1510 /*
1511 * The number of frames in the queue
1512 * dropped to 0 even if we sent less
1513 * frames than we thought we had on the
1514 * Tx queue.
1515 * This means we had holes in the BA
1516 * window that we just filled, ask
1517 * mac80211 to send EOSP since the
1518 * firmware won't know how to do that.
1519 * Send NDP and the firmware will send
1520 * EOSP notification that will trigger
1521 * a call to ieee80211_sta_eosp().
1522 */
1523 send_eosp_ndp = true;
1524 }
1525 }
1526
1527 spin_unlock_bh(&mvmsta->lock);
1528 if (send_eosp_ndp) {
1529 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1530 IEEE80211_FRAME_RELEASE_UAPSD,
1531 1, tid, false, false);
1532 mvmsta->sleep_tx_count = 0;
1533 ieee80211_send_eosp_nullfunc(sta, tid);
1534 }
1535 }
1536
1537 if (mvmsta->next_status_eosp) {
1538 mvmsta->next_status_eosp = false;
1539 ieee80211_sta_eosp(sta);
1540 }
1541 } else {
1542 mvmsta = NULL;
1543 }
1544
1545 /*
1546 * If the txq is not an AMPDU queue, there is no chance we freed
1547 * several skbs. Check that out...
1548 */
1549 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue)
1550 goto out;
1551
1552 /* We can't free more than one frame at once on a shared queue */
1553 WARN_ON(skb_freed > 1);
1554
1555 /* If we have still frames for this STA nothing to do here */
1556 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
1557 goto out;
1558
1559 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
1560
1561 /*
1562 * If there are no pending frames for this STA and
1563 * the tx to this station is not disabled, notify
1564 * mac80211 that this station can now wake up in its
1565 * STA table.
1566 * If mvmsta is not NULL, sta is valid.
1567 */
1568
1569 spin_lock_bh(&mvmsta->lock);
1570
1571 if (!mvmsta->disable_tx)
1572 ieee80211_sta_block_awake(mvm->hw, sta, false);
1573
1574 spin_unlock_bh(&mvmsta->lock);
1575 }
1576
1577 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
1578 /*
1579 * We are draining and this was the last packet - pre_rcu_remove
1580 * has been called already. We might be after the
1581 * synchronize_net already.
1582 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
1583 */
1584 set_bit(sta_id, mvm->sta_drained);
1585 schedule_work(&mvm->sta_drained_wk);
1586 }
1587
1588 out:
1589 rcu_read_unlock();
1590 }
1591
1592 #ifdef CONFIG_IWLWIFI_DEBUG
1593 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1594 static const char *iwl_get_agg_tx_status(u16 status)
1595 {
1596 switch (status & AGG_TX_STATE_STATUS_MSK) {
1597 AGG_TX_STATE_(TRANSMITTED);
1598 AGG_TX_STATE_(UNDERRUN);
1599 AGG_TX_STATE_(BT_PRIO);
1600 AGG_TX_STATE_(FEW_BYTES);
1601 AGG_TX_STATE_(ABORT);
1602 AGG_TX_STATE_(LAST_SENT_TTL);
1603 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1604 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1605 AGG_TX_STATE_(SCD_QUERY);
1606 AGG_TX_STATE_(TEST_BAD_CRC32);
1607 AGG_TX_STATE_(RESPONSE);
1608 AGG_TX_STATE_(DUMP_TX);
1609 AGG_TX_STATE_(DELAY_TX);
1610 }
1611
1612 return "UNKNOWN";
1613 }
1614
1615 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1616 struct iwl_rx_packet *pkt)
1617 {
1618 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1619 struct agg_tx_status *frame_status =
1620 iwl_mvm_get_agg_status(mvm, tx_resp);
1621 int i;
1622
1623 for (i = 0; i < tx_resp->frame_count; i++) {
1624 u16 fstatus = le16_to_cpu(frame_status[i].status);
1625
1626 IWL_DEBUG_TX_REPLY(mvm,
1627 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1628 iwl_get_agg_tx_status(fstatus),
1629 fstatus & AGG_TX_STATE_STATUS_MSK,
1630 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1631 AGG_TX_STATE_TRY_CNT_POS,
1632 le16_to_cpu(frame_status[i].sequence));
1633 }
1634 }
1635 #else
1636 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1637 struct iwl_rx_packet *pkt)
1638 {}
1639 #endif /* CONFIG_IWLWIFI_DEBUG */
1640
1641 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1642 struct iwl_rx_packet *pkt)
1643 {
1644 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1645 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1646 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1647 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1648 struct iwl_mvm_sta *mvmsta;
1649 int queue = SEQ_TO_QUEUE(sequence);
1650
1651 if (WARN_ON_ONCE(queue < mvm->first_agg_queue &&
1652 (!iwl_mvm_is_dqa_supported(mvm) ||
1653 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))))
1654 return;
1655
1656 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1657 return;
1658
1659 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1660
1661 rcu_read_lock();
1662
1663 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1664
1665 if (!WARN_ON_ONCE(!mvmsta)) {
1666 mvmsta->tid_data[tid].rate_n_flags =
1667 le32_to_cpu(tx_resp->initial_rate);
1668 mvmsta->tid_data[tid].tx_time =
1669 le16_to_cpu(tx_resp->wireless_media_time);
1670 mvmsta->tid_data[tid].lq_color =
1671 (tx_resp->tlc_info & TX_RES_RATE_TABLE_COLOR_MSK) >>
1672 TX_RES_RATE_TABLE_COLOR_POS;
1673 }
1674
1675 rcu_read_unlock();
1676 }
1677
1678 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1679 {
1680 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1681 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1682
1683 if (tx_resp->frame_count == 1)
1684 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1685 else
1686 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1687 }
1688
1689 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1690 int txq, int index,
1691 struct ieee80211_tx_info *ba_info, u32 rate)
1692 {
1693 struct sk_buff_head reclaimed_skbs;
1694 struct iwl_mvm_tid_data *tid_data;
1695 struct ieee80211_sta *sta;
1696 struct iwl_mvm_sta *mvmsta;
1697 struct sk_buff *skb;
1698 int freed;
1699
1700 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1701 tid >= IWL_MAX_TID_COUNT,
1702 "sta_id %d tid %d", sta_id, tid))
1703 return;
1704
1705 rcu_read_lock();
1706
1707 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1708
1709 /* Reclaiming frames for a station that has been deleted ? */
1710 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1711 rcu_read_unlock();
1712 return;
1713 }
1714
1715 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1716 tid_data = &mvmsta->tid_data[tid];
1717
1718 if (tid_data->txq_id != txq) {
1719 IWL_ERR(mvm,
1720 "invalid BA notification: Q %d, tid %d\n",
1721 tid_data->txq_id, tid);
1722 rcu_read_unlock();
1723 return;
1724 }
1725
1726 spin_lock_bh(&mvmsta->lock);
1727
1728 __skb_queue_head_init(&reclaimed_skbs);
1729
1730 /*
1731 * Release all TFDs before the SSN, i.e. all TFDs in front of
1732 * block-ack window (we assume that they've been successfully
1733 * transmitted ... if not, it's too late anyway).
1734 */
1735 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1736
1737 tid_data->next_reclaimed = index;
1738
1739 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1740
1741 freed = 0;
1742
1743 /* pack lq color from tid_data along the reduced txp */
1744 ba_info->status.status_driver_data[0] =
1745 RS_DRV_DATA_PACK(tid_data->lq_color,
1746 ba_info->status.status_driver_data[0]);
1747 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1748
1749 skb_queue_walk(&reclaimed_skbs, skb) {
1750 struct ieee80211_hdr *hdr = (void *)skb->data;
1751 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1752
1753 if (ieee80211_is_data_qos(hdr->frame_control))
1754 freed++;
1755 else
1756 WARN_ON_ONCE(1);
1757
1758 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1759
1760 memset(&info->status, 0, sizeof(info->status));
1761 /* Packet was transmitted successfully, failures come as single
1762 * frames because before failing a frame the firmware transmits
1763 * it without aggregation at least once.
1764 */
1765 info->flags |= IEEE80211_TX_STAT_ACK;
1766
1767 /* this is the first skb we deliver in this batch */
1768 /* put the rate scaling data there */
1769 if (freed == 1) {
1770 info->flags |= IEEE80211_TX_STAT_AMPDU;
1771 memcpy(&info->status, &ba_info->status,
1772 sizeof(ba_info->status));
1773 iwl_mvm_hwrate_to_tx_status(rate, info);
1774 }
1775 }
1776
1777 spin_unlock_bh(&mvmsta->lock);
1778
1779 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1780 * possible (i.e. first MPDU in the aggregation wasn't acked)
1781 * Still it's important to update RS about sent vs. acked.
1782 */
1783 if (skb_queue_empty(&reclaimed_skbs)) {
1784 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1785
1786 if (mvmsta->vif)
1787 chanctx_conf =
1788 rcu_dereference(mvmsta->vif->chanctx_conf);
1789
1790 if (WARN_ON_ONCE(!chanctx_conf))
1791 goto out;
1792
1793 ba_info->band = chanctx_conf->def.chan->band;
1794 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1795
1796 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1797 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1798 }
1799
1800 out:
1801 rcu_read_unlock();
1802
1803 while (!skb_queue_empty(&reclaimed_skbs)) {
1804 skb = __skb_dequeue(&reclaimed_skbs);
1805 ieee80211_tx_status(mvm->hw, skb);
1806 }
1807 }
1808
1809 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1810 {
1811 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1812 int sta_id, tid, txq, index;
1813 struct ieee80211_tx_info ba_info = {};
1814 struct iwl_mvm_ba_notif *ba_notif;
1815 struct iwl_mvm_tid_data *tid_data;
1816 struct iwl_mvm_sta *mvmsta;
1817
1818 if (iwl_mvm_has_new_tx_api(mvm)) {
1819 struct iwl_mvm_compressed_ba_notif *ba_res =
1820 (void *)pkt->data;
1821 int i;
1822
1823 sta_id = ba_res->sta_id;
1824 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1825 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1826 ba_info.status.tx_time =
1827 (u16)le32_to_cpu(ba_res->wireless_time);
1828 ba_info.status.status_driver_data[0] =
1829 (void *)(uintptr_t)ba_res->reduced_txp;
1830
1831 if (!le16_to_cpu(ba_res->tfd_cnt))
1832 goto out;
1833
1834 /* Free per TID */
1835 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) {
1836 struct iwl_mvm_compressed_ba_tfd *ba_tfd =
1837 &ba_res->tfd[i];
1838
1839 iwl_mvm_tx_reclaim(mvm, sta_id, ba_tfd->tid,
1840 (int)(le16_to_cpu(ba_tfd->q_num)),
1841 le16_to_cpu(ba_tfd->tfd_index),
1842 &ba_info,
1843 le32_to_cpu(ba_res->tx_rate));
1844 }
1845
1846 out:
1847 IWL_DEBUG_TX_REPLY(mvm,
1848 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1849 sta_id, le32_to_cpu(ba_res->flags),
1850 le16_to_cpu(ba_res->txed),
1851 le16_to_cpu(ba_res->done));
1852 return;
1853 }
1854
1855 ba_notif = (void *)pkt->data;
1856 sta_id = ba_notif->sta_id;
1857 tid = ba_notif->tid;
1858 /* "flow" corresponds to Tx queue */
1859 txq = le16_to_cpu(ba_notif->scd_flow);
1860 /* "ssn" is start of block-ack Tx window, corresponds to index
1861 * (in Tx queue's circular buffer) of first TFD/frame in window */
1862 index = le16_to_cpu(ba_notif->scd_ssn);
1863
1864 rcu_read_lock();
1865 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1866 if (WARN_ON_ONCE(!mvmsta)) {
1867 rcu_read_unlock();
1868 return;
1869 }
1870
1871 tid_data = &mvmsta->tid_data[tid];
1872
1873 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1874 ba_info.status.ampdu_len = ba_notif->txed;
1875 ba_info.status.tx_time = tid_data->tx_time;
1876 ba_info.status.status_driver_data[0] =
1877 (void *)(uintptr_t)ba_notif->reduced_txp;
1878
1879 rcu_read_unlock();
1880
1881 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1882 tid_data->rate_n_flags);
1883
1884 IWL_DEBUG_TX_REPLY(mvm,
1885 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1886 ba_notif->sta_addr, ba_notif->sta_id);
1887
1888 IWL_DEBUG_TX_REPLY(mvm,
1889 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1890 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1891 le64_to_cpu(ba_notif->bitmap), txq, index,
1892 ba_notif->txed, ba_notif->txed_2_done);
1893
1894 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1895 ba_notif->reduced_txp);
1896 }
1897
1898 /*
1899 * Note that there are transports that buffer frames before they reach
1900 * the firmware. This means that after flush_tx_path is called, the
1901 * queue might not be empty. The race-free way to handle this is to:
1902 * 1) set the station as draining
1903 * 2) flush the Tx path
1904 * 3) wait for the transport queues to be empty
1905 */
1906 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1907 {
1908 int ret;
1909 struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
1910 .queues_ctl = cpu_to_le32(tfd_msk),
1911 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1912 };
1913
1914 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
1915
1916 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1917 sizeof(flush_cmd), &flush_cmd);
1918 if (ret)
1919 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1920 return ret;
1921 }
1922
1923 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id,
1924 u16 tids, u32 flags)
1925 {
1926 int ret;
1927 struct iwl_tx_path_flush_cmd flush_cmd = {
1928 .sta_id = cpu_to_le32(sta_id),
1929 .tid_mask = cpu_to_le16(tids),
1930 };
1931
1932 WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
1933
1934 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1935 sizeof(flush_cmd), &flush_cmd);
1936 if (ret)
1937 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1938 return ret;
1939 }
1940
1941 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags)
1942 {
1943 struct iwl_mvm_int_sta *int_sta = sta;
1944 struct iwl_mvm_sta *mvm_sta = sta;
1945
1946 if (iwl_mvm_has_new_tx_api(mvm)) {
1947 if (internal)
1948 return iwl_mvm_flush_sta_tids(mvm, int_sta->sta_id,
1949 BIT(IWL_MGMT_TID), flags);
1950
1951 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id,
1952 0xFF, flags);
1953 }
1954
1955 if (internal)
1956 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk,
1957 flags);
1958
1959 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags);
1960 }
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