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iwlwifi: mvm/pcie: adjust A-MSDU tx_cmd length in PCIe
[linux-2.6/btrfs-unstable.git] / drivers / net / wireless / intel / iwlwifi / mvm / tx.c
blob8daf4fbe45345eea2c7314b53b6d67b54b274c54
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 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 * All rights reserved.
38 *
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
41 * are met:
42 *
43 * * Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
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46 * notice, this list of conditions and the following disclaimer in
47 * the documentation and/or other materials provided with the
48 * distribution.
49 * * Neither the name Intel Corporation nor the names of its
50 * contributors may be used to endorse or promote products derived
51 * from this software without specific prior written permission.
52 *
53 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
54 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
55 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
56 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
57 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
58 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
59 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
60 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
61 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
62 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
63 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
64 *
65 *****************************************************************************/
66 #include <linux/ieee80211.h>
67 #include <linux/etherdevice.h>
68 #include <linux/tcp.h>
69 #include <net/ip.h>
70 #include <net/ipv6.h>
71
72 #include "iwl-trans.h"
73 #include "iwl-eeprom-parse.h"
74 #include "mvm.h"
75 #include "sta.h"
76 #include "fw-dbg.h"
77
78 static void
79 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
80 u16 tid, u16 ssn)
81 {
82 struct iwl_fw_dbg_trigger_tlv *trig;
83 struct iwl_fw_dbg_trigger_ba *ba_trig;
84
85 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
86 return;
87
88 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
89 ba_trig = (void *)trig->data;
90
91 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
92 return;
93
94 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
95 return;
96
97 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
98 "BAR sent to %pM, tid %d, ssn %d",
99 addr, tid, ssn);
100 }
101
102 #define OPT_HDR(type, skb, off) \
103 (type *)(skb_network_header(skb) + (off))
104
105 static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
106 struct ieee80211_hdr *hdr,
107 struct ieee80211_tx_info *info)
108 {
109 u16 offload_assist = 0;
110 #if IS_ENABLED(CONFIG_INET)
111 u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
112 u8 protocol = 0;
113
114 /*
115 * Do not compute checksum if already computed or if transport will
116 * compute it
117 */
118 if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD)
119 goto out;
120
121 /* We do not expect to be requested to csum stuff we do not support */
122 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
123 (skb->protocol != htons(ETH_P_IP) &&
124 skb->protocol != htons(ETH_P_IPV6)),
125 "No support for requested checksum\n")) {
126 skb_checksum_help(skb);
127 goto out;
128 }
129
130 if (skb->protocol == htons(ETH_P_IP)) {
131 protocol = ip_hdr(skb)->protocol;
132 } else {
133 #if IS_ENABLED(CONFIG_IPV6)
134 struct ipv6hdr *ipv6h =
135 (struct ipv6hdr *)skb_network_header(skb);
136 unsigned int off = sizeof(*ipv6h);
137
138 protocol = ipv6h->nexthdr;
139 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
140 struct ipv6_opt_hdr *hp;
141
142 /* only supported extension headers */
143 if (protocol != NEXTHDR_ROUTING &&
144 protocol != NEXTHDR_HOP &&
145 protocol != NEXTHDR_DEST) {
146 skb_checksum_help(skb);
147 goto out;
148 }
149
150 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
151 protocol = hp->nexthdr;
152 off += ipv6_optlen(hp);
153 }
154 /* if we get here - protocol now should be TCP/UDP */
155 #endif
156 }
157
158 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
159 WARN_ON_ONCE(1);
160 skb_checksum_help(skb);
161 goto out;
162 }
163
164 /* enable L4 csum */
165 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
166
167 /*
168 * Set offset to IP header (snap).
169 * We don't support tunneling so no need to take care of inner header.
170 * Size is in words.
171 */
172 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
173
174 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
175 if (skb->protocol == htons(ETH_P_IP) &&
176 (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) {
177 ip_hdr(skb)->check = 0;
178 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
179 }
180
181 /* reset UDP/TCP header csum */
182 if (protocol == IPPROTO_TCP)
183 tcp_hdr(skb)->check = 0;
184 else
185 udp_hdr(skb)->check = 0;
186
187 /* mac header len should include IV, size is in words */
188 if (info->control.hw_key)
189 mh_len += info->control.hw_key->iv_len;
190 mh_len /= 2;
191 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
192
193 out:
194 #endif
195 return offload_assist;
196 }
197
198 /*
199 * Sets most of the Tx cmd's fields
200 */
201 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
202 struct iwl_tx_cmd *tx_cmd,
203 struct ieee80211_tx_info *info, u8 sta_id)
204 {
205 struct ieee80211_hdr *hdr = (void *)skb->data;
206 __le16 fc = hdr->frame_control;
207 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
208 u32 len = skb->len + FCS_LEN;
209 u8 ac;
210
211 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
212 tx_flags |= TX_CMD_FLG_ACK;
213 else
214 tx_flags &= ~TX_CMD_FLG_ACK;
215
216 if (ieee80211_is_probe_resp(fc))
217 tx_flags |= TX_CMD_FLG_TSF;
218
219 if (ieee80211_has_morefrags(fc))
220 tx_flags |= TX_CMD_FLG_MORE_FRAG;
221
222 if (ieee80211_is_data_qos(fc)) {
223 u8 *qc = ieee80211_get_qos_ctl(hdr);
224 tx_cmd->tid_tspec = qc[0] & 0xf;
225 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
226 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
227 tx_cmd->offload_assist |=
228 cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU));
229 } else if (ieee80211_is_back_req(fc)) {
230 struct ieee80211_bar *bar = (void *)skb->data;
231 u16 control = le16_to_cpu(bar->control);
232 u16 ssn = le16_to_cpu(bar->start_seq_num);
233
234 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
235 tx_cmd->tid_tspec = (control &
236 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
237 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
238 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
239 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
240 ssn);
241 } else {
242 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
243 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
244 tx_flags |= TX_CMD_FLG_SEQ_CTL;
245 else
246 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
247 }
248
249 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
250 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
251 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
252 else
253 ac = tid_to_mac80211_ac[0];
254
255 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
256 TX_CMD_FLG_BT_PRIO_POS;
257
258 if (ieee80211_is_mgmt(fc)) {
259 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
260 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
261 else if (ieee80211_is_action(fc))
262 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
263 else
264 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
265
266 /* The spec allows Action frames in A-MPDU, we don't support
267 * it
268 */
269 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
270 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
271 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
272 } else {
273 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
274 }
275
276 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
277 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
278 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
279
280 if (fw_has_capa(&mvm->fw->ucode_capa,
281 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
282 ieee80211_action_contains_tpc(skb))
283 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
284
285 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
286 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
287 tx_cmd->len = cpu_to_le16((u16)skb->len);
288 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
289 tx_cmd->sta_id = sta_id;
290
291 /* padding is inserted later in transport */
292 if (ieee80211_hdrlen(fc) % 4 &&
293 !(tx_cmd->offload_assist & cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU))))
294 tx_cmd->offload_assist |= cpu_to_le16(BIT(TX_CMD_OFFLD_PAD));
295
296 tx_cmd->offload_assist |=
297 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info));
298 }
299
300 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
301 struct ieee80211_tx_info *info,
302 struct ieee80211_sta *sta)
303 {
304 int rate_idx;
305 u8 rate_plcp;
306 u32 rate_flags;
307
308 /* HT rate doesn't make sense for a non data frame */
309 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
310 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n",
311 info->control.rates[0].flags,
312 info->control.rates[0].idx);
313
314 rate_idx = info->control.rates[0].idx;
315 /* if the rate isn't a well known legacy rate, take the lowest one */
316 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
317 rate_idx = rate_lowest_index(
318 &mvm->nvm_data->bands[info->band], sta);
319
320 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
321 if (info->band == NL80211_BAND_5GHZ)
322 rate_idx += IWL_FIRST_OFDM_RATE;
323
324 /* For 2.4 GHZ band, check that there is no need to remap */
325 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
326
327 /* Get PLCP rate for tx_cmd->rate_n_flags */
328 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
329
330 if (info->band == NL80211_BAND_2GHZ &&
331 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
332 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
333 else
334 rate_flags =
335 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
336
337 /* Set CCK flag as needed */
338 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
339 rate_flags |= RATE_MCS_CCK_MSK;
340
341 return (u32)rate_plcp | rate_flags;
342 }
343
344 /*
345 * Sets the fields in the Tx cmd that are rate related
346 */
347 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
348 struct ieee80211_tx_info *info,
349 struct ieee80211_sta *sta, __le16 fc)
350 {
351 /* Set retry limit on RTS packets */
352 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
353
354 /* Set retry limit on DATA packets and Probe Responses*/
355 if (ieee80211_is_probe_resp(fc)) {
356 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
357 tx_cmd->rts_retry_limit =
358 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
359 } else if (ieee80211_is_back_req(fc)) {
360 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
361 } else {
362 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
363 }
364
365 /*
366 * for data packets, rate info comes from the table inside the fw. This
367 * table is controlled by LINK_QUALITY commands
368 */
369
370 if (ieee80211_is_data(fc) && sta) {
371 tx_cmd->initial_rate_index = 0;
372 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
373 return;
374 } else if (ieee80211_is_back_req(fc)) {
375 tx_cmd->tx_flags |=
376 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
377 }
378
379 mvm->mgmt_last_antenna_idx =
380 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
381 mvm->mgmt_last_antenna_idx);
382
383 /* Set the rate in the TX cmd */
384 tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta));
385 }
386
387 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
388 u8 *crypto_hdr)
389 {
390 struct ieee80211_key_conf *keyconf = info->control.hw_key;
391 u64 pn;
392
393 pn = atomic64_inc_return(&keyconf->tx_pn);
394 crypto_hdr[0] = pn;
395 crypto_hdr[2] = 0;
396 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
397 crypto_hdr[1] = pn >> 8;
398 crypto_hdr[4] = pn >> 16;
399 crypto_hdr[5] = pn >> 24;
400 crypto_hdr[6] = pn >> 32;
401 crypto_hdr[7] = pn >> 40;
402 }
403
404 /*
405 * Sets the fields in the Tx cmd that are crypto related
406 */
407 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
408 struct ieee80211_tx_info *info,
409 struct iwl_tx_cmd *tx_cmd,
410 struct sk_buff *skb_frag,
411 int hdrlen)
412 {
413 struct ieee80211_key_conf *keyconf = info->control.hw_key;
414 u8 *crypto_hdr = skb_frag->data + hdrlen;
415 u64 pn;
416
417 switch (keyconf->cipher) {
418 case WLAN_CIPHER_SUITE_CCMP:
419 case WLAN_CIPHER_SUITE_CCMP_256:
420 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
421 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
422 break;
423
424 case WLAN_CIPHER_SUITE_TKIP:
425 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
426 pn = atomic64_inc_return(&keyconf->tx_pn);
427 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
428 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
429 break;
430
431 case WLAN_CIPHER_SUITE_WEP104:
432 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
433 /* fall through */
434 case WLAN_CIPHER_SUITE_WEP40:
435 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
436 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
437 TX_CMD_SEC_WEP_KEY_IDX_MSK);
438
439 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
440 break;
441 case WLAN_CIPHER_SUITE_GCMP:
442 case WLAN_CIPHER_SUITE_GCMP_256:
443 /* TODO: Taking the key from the table might introduce a race
444 * when PTK rekeying is done, having an old packets with a PN
445 * based on the old key but the message encrypted with a new
446 * one.
447 * Need to handle this.
448 */
449 tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TX_CMD_SEC_KEY_FROM_TABLE;
450 tx_cmd->key[0] = keyconf->hw_key_idx;
451 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
452 break;
453 default:
454 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
455 }
456 }
457
458 /*
459 * Allocates and sets the Tx cmd the driver data pointers in the skb
460 */
461 static struct iwl_device_cmd *
462 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
463 struct ieee80211_tx_info *info, int hdrlen,
464 struct ieee80211_sta *sta, u8 sta_id)
465 {
466 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
467 struct iwl_device_cmd *dev_cmd;
468 struct iwl_tx_cmd *tx_cmd;
469
470 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
471
472 if (unlikely(!dev_cmd))
473 return NULL;
474
475 memset(dev_cmd, 0, sizeof(*dev_cmd));
476 dev_cmd->hdr.cmd = TX_CMD;
477 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
478
479 if (info->control.hw_key)
480 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
481
482 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
483
484 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
485
486 return dev_cmd;
487 }
488
489 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
490 struct iwl_device_cmd *cmd)
491 {
492 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
493
494 memset(&skb_info->status, 0, sizeof(skb_info->status));
495 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
496
497 skb_info->driver_data[1] = cmd;
498 }
499
500 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
501 struct ieee80211_tx_info *info, __le16 fc)
502 {
503 if (!iwl_mvm_is_dqa_supported(mvm))
504 return info->hw_queue;
505
506 switch (info->control.vif->type) {
507 case NL80211_IFTYPE_AP:
508 /*
509 * handle legacy hostapd as well, where station may be added
510 * only after assoc.
511 */
512 if (ieee80211_is_probe_resp(fc) || ieee80211_is_auth(fc))
513 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
514 if (info->hw_queue == info->control.vif->cab_queue)
515 return info->hw_queue;
516
517 WARN_ON_ONCE(1);
518 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
519 case NL80211_IFTYPE_P2P_DEVICE:
520 if (ieee80211_is_mgmt(fc))
521 return IWL_MVM_DQA_P2P_DEVICE_QUEUE;
522 if (info->hw_queue == info->control.vif->cab_queue)
523 return info->hw_queue;
524
525 WARN_ON_ONCE(1);
526 return IWL_MVM_DQA_P2P_DEVICE_QUEUE;
527 default:
528 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
529 return -1;
530 }
531 }
532
533 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
534 {
535 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
536 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
537 struct ieee80211_tx_info info;
538 struct iwl_device_cmd *dev_cmd;
539 struct iwl_tx_cmd *tx_cmd;
540 u8 sta_id;
541 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
542 int queue;
543
544 /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
545 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
546 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
547 * and hence needs to be sent on the aux queue
548 */
549 if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
550 skb_info->control.vif->type == NL80211_IFTYPE_STATION)
551 skb_info->hw_queue = mvm->aux_queue;
552
553 memcpy(&info, skb->cb, sizeof(info));
554
555 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
556 return -1;
557
558 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
559 (!info.control.vif ||
560 info.hw_queue != info.control.vif->cab_queue)))
561 return -1;
562
563 queue = info.hw_queue;
564
565 /*
566 * If the interface on which the frame is sent is the P2P_DEVICE
567 * or an AP/GO interface use the broadcast station associated
568 * with it; otherwise if the interface is a managed interface
569 * use the AP station associated with it for multicast traffic
570 * (this is not possible for unicast packets as a TLDS discovery
571 * response are sent without a station entry); otherwise use the
572 * AUX station.
573 * In DQA mode, if vif is of type STATION and frames are not multicast
574 * or offchannel, they should be sent from the BSS queue.
575 * For example, TDLS setup frames should be sent on this queue,
576 * as they go through the AP.
577 */
578 sta_id = mvm->aux_sta.sta_id;
579 if (info.control.vif) {
580 struct iwl_mvm_vif *mvmvif =
581 iwl_mvm_vif_from_mac80211(info.control.vif);
582
583 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
584 info.control.vif->type == NL80211_IFTYPE_AP) {
585 sta_id = mvmvif->bcast_sta.sta_id;
586 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info,
587 hdr->frame_control);
588 if (queue < 0)
589 return -1;
590
591 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
592 is_multicast_ether_addr(hdr->addr1)) {
593 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id);
594
595 if (ap_sta_id != IWL_MVM_STATION_COUNT)
596 sta_id = ap_sta_id;
597 } else if (iwl_mvm_is_dqa_supported(mvm) &&
598 info.control.vif->type == NL80211_IFTYPE_STATION &&
599 queue != mvm->aux_queue) {
600 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
601 }
602 }
603
604 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
605
606 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
607 if (!dev_cmd)
608 return -1;
609
610 /* From now on, we cannot access info->control */
611 iwl_mvm_skb_prepare_status(skb, dev_cmd);
612
613 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
614
615 /* Copy MAC header from skb into command buffer */
616 memcpy(tx_cmd->hdr, hdr, hdrlen);
617
618 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
619 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
620 return -1;
621 }
622
623 /*
624 * Increase the pending frames counter, so that later when a reply comes
625 * in and the counter is decreased - we don't start getting negative
626 * values.
627 * Note that we don't need to make sure it isn't agg'd, since we're
628 * TXing non-sta
629 */
630 atomic_inc(&mvm->pending_frames[sta_id]);
631
632 return 0;
633 }
634
635 #ifdef CONFIG_INET
636 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
637 struct ieee80211_tx_info *info,
638 struct ieee80211_sta *sta,
639 struct sk_buff_head *mpdus_skb)
640 {
641 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
642 struct ieee80211_hdr *hdr = (void *)skb->data;
643 unsigned int mss = skb_shinfo(skb)->gso_size;
644 struct sk_buff *tmp, *next;
645 char cb[sizeof(skb->cb)];
646 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
647 bool ipv4 = (skb->protocol == htons(ETH_P_IP));
648 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
649 u16 snap_ip_tcp, pad, i = 0;
650 unsigned int dbg_max_amsdu_len;
651 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG;
652 u8 *qc, tid, txf;
653
654 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
655 tcp_hdrlen(skb);
656
657 qc = ieee80211_get_qos_ctl(hdr);
658 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
659 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
660 return -EINVAL;
661
662 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len);
663
664 if (!sta->max_amsdu_len ||
665 !ieee80211_is_data_qos(hdr->frame_control) ||
666 (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) {
667 num_subframes = 1;
668 pad = 0;
669 goto segment;
670 }
671
672 /*
673 * Do not build AMSDU for IPv6 with extension headers.
674 * ask stack to segment and checkum the generated MPDUs for us.
675 */
676 if (skb->protocol == htons(ETH_P_IPV6) &&
677 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
678 IPPROTO_TCP) {
679 num_subframes = 1;
680 pad = 0;
681 netdev_features &= ~NETIF_F_CSUM_MASK;
682 goto segment;
683 }
684
685 /*
686 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
687 * during an BA session.
688 */
689 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
690 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) {
691 num_subframes = 1;
692 pad = 0;
693 goto segment;
694 }
695
696 max_amsdu_len = sta->max_amsdu_len;
697
698 /* the Tx FIFO to which this A-MSDU will be routed */
699 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
700
701 /*
702 * Don't send an AMSDU that will be longer than the TXF.
703 * Add a security margin of 256 for the TX command + headers.
704 * We also want to have the start of the next packet inside the
705 * fifo to be able to send bursts.
706 */
707 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
708 mvm->shared_mem_cfg.txfifo_size[txf] - 256);
709
710 if (unlikely(dbg_max_amsdu_len))
711 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
712 dbg_max_amsdu_len);
713
714 /*
715 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
716 * supported. This is a spec requirement (IEEE 802.11-2015
717 * section 8.7.3 NOTE 3).
718 */
719 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
720 !sta->vht_cap.vht_supported)
721 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
722
723 /* Sub frame header + SNAP + IP header + TCP header + MSS */
724 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
725 pad = (4 - subf_len) & 0x3;
726
727 /*
728 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
729 * N * subf_len + (N - 1) * pad.
730 */
731 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
732 if (num_subframes > 1)
733 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
734
735 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
736 tcp_hdrlen(skb) + skb->data_len;
737
738 /*
739 * Make sure we have enough TBs for the A-MSDU:
740 * 2 for each subframe
741 * 1 more for each fragment
742 * 1 more for the potential data in the header
743 */
744 num_subframes =
745 min_t(unsigned int, num_subframes,
746 (mvm->trans->max_skb_frags - 1 -
747 skb_shinfo(skb)->nr_frags) / 2);
748
749 /* This skb fits in one single A-MSDU */
750 if (num_subframes * mss >= tcp_payload_len) {
751 __skb_queue_tail(mpdus_skb, skb);
752 return 0;
753 }
754
755 /*
756 * Trick the segmentation function to make it
757 * create SKBs that can fit into one A-MSDU.
758 */
759 segment:
760 skb_shinfo(skb)->gso_size = num_subframes * mss;
761 memcpy(cb, skb->cb, sizeof(cb));
762
763 next = skb_gso_segment(skb, netdev_features);
764 skb_shinfo(skb)->gso_size = mss;
765 if (WARN_ON_ONCE(IS_ERR(next)))
766 return -EINVAL;
767 else if (next)
768 consume_skb(skb);
769
770 while (next) {
771 tmp = next;
772 next = tmp->next;
773
774 memcpy(tmp->cb, cb, sizeof(tmp->cb));
775 /*
776 * Compute the length of all the data added for the A-MSDU.
777 * This will be used to compute the length to write in the TX
778 * command. We have: SNAP + IP + TCP for n -1 subframes and
779 * ETH header for n subframes.
780 */
781 tcp_payload_len = skb_tail_pointer(tmp) -
782 skb_transport_header(tmp) -
783 tcp_hdrlen(tmp) + tmp->data_len;
784
785 if (ipv4)
786 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
787
788 if (tcp_payload_len > mss) {
789 skb_shinfo(tmp)->gso_size = mss;
790 } else {
791 qc = ieee80211_get_qos_ctl((void *)tmp->data);
792
793 if (ipv4)
794 ip_send_check(ip_hdr(tmp));
795 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
796 skb_shinfo(tmp)->gso_size = 0;
797 }
798
799 tmp->prev = NULL;
800 tmp->next = NULL;
801
802 __skb_queue_tail(mpdus_skb, tmp);
803 i++;
804 }
805
806 return 0;
807 }
808 #else /* CONFIG_INET */
809 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
810 struct ieee80211_tx_info *info,
811 struct ieee80211_sta *sta,
812 struct sk_buff_head *mpdus_skb)
813 {
814 /* Impossible to get TSO with CONFIG_INET */
815 WARN_ON(1);
816
817 return -1;
818 }
819 #endif
820
821 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
822 struct iwl_mvm_sta *mvm_sta, u8 tid,
823 struct sk_buff *skb)
824 {
825 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
826 u8 mac_queue = info->hw_queue;
827 struct sk_buff_head *deferred_tx_frames;
828
829 lockdep_assert_held(&mvm_sta->lock);
830
831 mvm_sta->deferred_traffic_tid_map |= BIT(tid);
832 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);
833
834 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;
835
836 skb_queue_tail(deferred_tx_frames, skb);
837
838 /*
839 * The first deferred frame should've stopped the MAC queues, so we
840 * should never get a second deferred frame for the RA/TID.
841 */
842 if (!WARN(skb_queue_len(deferred_tx_frames) != 1,
843 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid,
844 skb_queue_len(deferred_tx_frames))) {
845 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
846 schedule_work(&mvm->add_stream_wk);
847 }
848 }
849
850 /* Check if there are any timed-out TIDs on a given shared TXQ */
851 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
852 {
853 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
854 unsigned long now = jiffies;
855 int tid;
856
857 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
858 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
859 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
860 return true;
861 }
862
863 return false;
864 }
865
866 /*
867 * Sets the fields in the Tx cmd that are crypto related
868 */
869 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
870 struct ieee80211_tx_info *info,
871 struct ieee80211_sta *sta)
872 {
873 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
874 struct iwl_mvm_sta *mvmsta;
875 struct iwl_device_cmd *dev_cmd;
876 struct iwl_tx_cmd *tx_cmd;
877 __le16 fc;
878 u16 seq_number = 0;
879 u8 tid = IWL_MAX_TID_COUNT;
880 u8 txq_id = info->hw_queue;
881 bool is_ampdu = false;
882 int hdrlen;
883
884 mvmsta = iwl_mvm_sta_from_mac80211(sta);
885 fc = hdr->frame_control;
886 hdrlen = ieee80211_hdrlen(fc);
887
888 if (WARN_ON_ONCE(!mvmsta))
889 return -1;
890
891 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
892 return -1;
893
894 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
895 sta, mvmsta->sta_id);
896 if (!dev_cmd)
897 goto drop;
898
899 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
900
901 /*
902 * we handle that entirely ourselves -- for uAPSD the firmware
903 * will always send a notification, and for PS-Poll responses
904 * we'll notify mac80211 when getting frame status
905 */
906 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
907
908 spin_lock(&mvmsta->lock);
909
910 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
911 u8 *qc = NULL;
912 qc = ieee80211_get_qos_ctl(hdr);
913 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
914 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
915 goto drop_unlock_sta;
916
917 seq_number = mvmsta->tid_data[tid].seq_number;
918 seq_number &= IEEE80211_SCTL_SEQ;
919 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
920 hdr->seq_ctrl |= cpu_to_le16(seq_number);
921 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
922 } else if (iwl_mvm_is_dqa_supported(mvm) &&
923 (ieee80211_is_qos_nullfunc(fc) ||
924 ieee80211_is_nullfunc(fc))) {
925 /*
926 * nullfunc frames should go to the MGMT queue regardless of QOS
927 */
928 tid = IWL_MAX_TID_COUNT;
929 }
930
931 if (iwl_mvm_is_dqa_supported(mvm)) {
932 txq_id = mvmsta->tid_data[tid].txq_id;
933
934 if (ieee80211_is_mgmt(fc))
935 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
936 }
937
938 /* Copy MAC header from skb into command buffer */
939 memcpy(tx_cmd->hdr, hdr, hdrlen);
940
941 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
942
943 if (sta->tdls && !iwl_mvm_is_dqa_supported(mvm)) {
944 /* default to TID 0 for non-QoS packets */
945 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
946
947 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
948 }
949
950 if (is_ampdu) {
951 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
952 goto drop_unlock_sta;
953 txq_id = mvmsta->tid_data[tid].txq_id;
954 }
955
956 /* Check if TXQ needs to be allocated or re-activated */
957 if (unlikely(txq_id == IEEE80211_INVAL_HW_QUEUE ||
958 !mvmsta->tid_data[tid].is_tid_active) &&
959 iwl_mvm_is_dqa_supported(mvm)) {
960 /* If TXQ needs to be allocated... */
961 if (txq_id == IEEE80211_INVAL_HW_QUEUE) {
962 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);
963
964 /*
965 * The frame is now deferred, and the worker scheduled
966 * will re-allocate it, so we can free it for now.
967 */
968 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
969 spin_unlock(&mvmsta->lock);
970 return 0;
971 }
972
973 /* If we are here - TXQ exists and needs to be re-activated */
974 spin_lock(&mvm->queue_info_lock);
975 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
976 mvmsta->tid_data[tid].is_tid_active = true;
977 spin_unlock(&mvm->queue_info_lock);
978
979 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n",
980 txq_id);
981 }
982
983 if (iwl_mvm_is_dqa_supported(mvm)) {
984 /* Keep track of the time of the last frame for this RA/TID */
985 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
986
987 /*
988 * If we have timed-out TIDs - schedule the worker that will
989 * reconfig the queues and update them
990 *
991 * Note that the mvm->queue_info_lock isn't being taken here in
992 * order to not serialize the TX flow. This isn't dangerous
993 * because scheduling mvm->add_stream_wk can't ruin the state,
994 * and if we DON'T schedule it due to some race condition then
995 * next TX we get here we will.
996 */
997 if (unlikely(mvm->queue_info[txq_id].status ==
998 IWL_MVM_QUEUE_SHARED &&
999 iwl_mvm_txq_should_update(mvm, txq_id)))
1000 schedule_work(&mvm->add_stream_wk);
1001 }
1002
1003 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
1004 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
1005
1006 /* From now on, we cannot access info->control */
1007 iwl_mvm_skb_prepare_status(skb, dev_cmd);
1008
1009 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1010 goto drop_unlock_sta;
1011
1012 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1013 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1014
1015 spin_unlock(&mvmsta->lock);
1016
1017 /* Increase pending frames count if this isn't AMPDU */
1018 if (!is_ampdu)
1019 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
1020
1021 return 0;
1022
1023 drop_unlock_sta:
1024 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1025 spin_unlock(&mvmsta->lock);
1026 drop:
1027 return -1;
1028 }
1029
1030 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
1031 struct ieee80211_sta *sta)
1032 {
1033 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1034 struct ieee80211_tx_info info;
1035 struct sk_buff_head mpdus_skbs;
1036 unsigned int payload_len;
1037 int ret;
1038
1039 if (WARN_ON_ONCE(!mvmsta))
1040 return -1;
1041
1042 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1043 return -1;
1044
1045 memcpy(&info, skb->cb, sizeof(info));
1046
1047 if (!skb_is_gso(skb))
1048 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1049
1050 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1051 tcp_hdrlen(skb) + skb->data_len;
1052
1053 if (payload_len <= skb_shinfo(skb)->gso_size)
1054 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1055
1056 __skb_queue_head_init(&mpdus_skbs);
1057
1058 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1059 if (ret)
1060 return ret;
1061
1062 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1063 return ret;
1064
1065 while (!skb_queue_empty(&mpdus_skbs)) {
1066 skb = __skb_dequeue(&mpdus_skbs);
1067
1068 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1069 if (ret) {
1070 __skb_queue_purge(&mpdus_skbs);
1071 return ret;
1072 }
1073 }
1074
1075 return 0;
1076 }
1077
1078 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1079 struct ieee80211_sta *sta, u8 tid)
1080 {
1081 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1082 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1083 struct ieee80211_vif *vif = mvmsta->vif;
1084
1085 lockdep_assert_held(&mvmsta->lock);
1086
1087 if ((tid_data->state == IWL_AGG_ON ||
1088 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1089 iwl_mvm_tid_queued(tid_data) == 0) {
1090 /*
1091 * Now that this aggregation queue is empty tell mac80211 so it
1092 * knows we no longer have frames buffered for the station on
1093 * this TID (for the TIM bitmap calculation.)
1094 */
1095 ieee80211_sta_set_buffered(sta, tid, false);
1096 }
1097
1098 if (tid_data->ssn != tid_data->next_reclaimed)
1099 return;
1100
1101 switch (tid_data->state) {
1102 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1103 IWL_DEBUG_TX_QUEUES(mvm,
1104 "Can continue addBA flow ssn = next_recl = %d\n",
1105 tid_data->next_reclaimed);
1106 tid_data->state = IWL_AGG_STARTING;
1107 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1108 break;
1109
1110 case IWL_EMPTYING_HW_QUEUE_DELBA:
1111 IWL_DEBUG_TX_QUEUES(mvm,
1112 "Can continue DELBA flow ssn = next_recl = %d\n",
1113 tid_data->next_reclaimed);
1114 if (!iwl_mvm_is_dqa_supported(mvm)) {
1115 u8 mac80211_ac = tid_to_mac80211_ac[tid];
1116
1117 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
1118 vif->hw_queue[mac80211_ac], tid,
1119 CMD_ASYNC);
1120 }
1121 tid_data->state = IWL_AGG_OFF;
1122 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1123 break;
1124
1125 default:
1126 break;
1127 }
1128 }
1129
1130 #ifdef CONFIG_IWLWIFI_DEBUG
1131 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1132 {
1133 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1134 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1135
1136 switch (status & TX_STATUS_MSK) {
1137 case TX_STATUS_SUCCESS:
1138 return "SUCCESS";
1139 TX_STATUS_POSTPONE(DELAY);
1140 TX_STATUS_POSTPONE(FEW_BYTES);
1141 TX_STATUS_POSTPONE(BT_PRIO);
1142 TX_STATUS_POSTPONE(QUIET_PERIOD);
1143 TX_STATUS_POSTPONE(CALC_TTAK);
1144 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1145 TX_STATUS_FAIL(SHORT_LIMIT);
1146 TX_STATUS_FAIL(LONG_LIMIT);
1147 TX_STATUS_FAIL(UNDERRUN);
1148 TX_STATUS_FAIL(DRAIN_FLOW);
1149 TX_STATUS_FAIL(RFKILL_FLUSH);
1150 TX_STATUS_FAIL(LIFE_EXPIRE);
1151 TX_STATUS_FAIL(DEST_PS);
1152 TX_STATUS_FAIL(HOST_ABORTED);
1153 TX_STATUS_FAIL(BT_RETRY);
1154 TX_STATUS_FAIL(STA_INVALID);
1155 TX_STATUS_FAIL(FRAG_DROPPED);
1156 TX_STATUS_FAIL(TID_DISABLE);
1157 TX_STATUS_FAIL(FIFO_FLUSHED);
1158 TX_STATUS_FAIL(SMALL_CF_POLL);
1159 TX_STATUS_FAIL(FW_DROP);
1160 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1161 }
1162
1163 return "UNKNOWN";
1164
1165 #undef TX_STATUS_FAIL
1166 #undef TX_STATUS_POSTPONE
1167 }
1168 #endif /* CONFIG_IWLWIFI_DEBUG */
1169
1170 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1171 enum nl80211_band band,
1172 struct ieee80211_tx_rate *r)
1173 {
1174 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1175 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1176 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1177 case RATE_MCS_CHAN_WIDTH_20:
1178 break;
1179 case RATE_MCS_CHAN_WIDTH_40:
1180 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1181 break;
1182 case RATE_MCS_CHAN_WIDTH_80:
1183 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1184 break;
1185 case RATE_MCS_CHAN_WIDTH_160:
1186 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1187 break;
1188 }
1189 if (rate_n_flags & RATE_MCS_SGI_MSK)
1190 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1191 if (rate_n_flags & RATE_MCS_HT_MSK) {
1192 r->flags |= IEEE80211_TX_RC_MCS;
1193 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1194 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1195 ieee80211_rate_set_vht(
1196 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1197 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1198 RATE_VHT_MCS_NSS_POS) + 1);
1199 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1200 } else {
1201 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1202 band);
1203 }
1204 }
1205
1206 /**
1207 * translate ucode response to mac80211 tx status control values
1208 */
1209 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1210 struct ieee80211_tx_info *info)
1211 {
1212 struct ieee80211_tx_rate *r = &info->status.rates[0];
1213
1214 info->status.antenna =
1215 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1216 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1217 }
1218
1219 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1220 u32 status)
1221 {
1222 struct iwl_fw_dbg_trigger_tlv *trig;
1223 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1224 int i;
1225
1226 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
1227 return;
1228
1229 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
1230 status_trig = (void *)trig->data;
1231
1232 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
1233 return;
1234
1235 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1236 /* don't collect on status 0 */
1237 if (!status_trig->statuses[i].status)
1238 break;
1239
1240 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1241 continue;
1242
1243 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
1244 "Tx status %d was received",
1245 status & TX_STATUS_MSK);
1246 break;
1247 }
1248 }
1249
1250 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1251 struct iwl_rx_packet *pkt)
1252 {
1253 struct ieee80211_sta *sta;
1254 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1255 int txq_id = SEQ_TO_QUEUE(sequence);
1256 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1257 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1258 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1259 u32 status = le16_to_cpu(tx_resp->status.status);
1260 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
1261 struct iwl_mvm_sta *mvmsta;
1262 struct sk_buff_head skbs;
1263 u8 skb_freed = 0;
1264 u16 next_reclaimed, seq_ctl;
1265 bool is_ndp = false;
1266 bool txq_agg = false; /* Is this TXQ aggregated */
1267
1268 __skb_queue_head_init(&skbs);
1269
1270 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1271
1272 /* we can free until ssn % q.n_bd not inclusive */
1273 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1274
1275 while (!skb_queue_empty(&skbs)) {
1276 struct sk_buff *skb = __skb_dequeue(&skbs);
1277 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1278
1279 skb_freed++;
1280
1281 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1282
1283 memset(&info->status, 0, sizeof(info->status));
1284
1285 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1286
1287 /* inform mac80211 about what happened with the frame */
1288 switch (status & TX_STATUS_MSK) {
1289 case TX_STATUS_SUCCESS:
1290 case TX_STATUS_DIRECT_DONE:
1291 info->flags |= IEEE80211_TX_STAT_ACK;
1292 break;
1293 case TX_STATUS_FAIL_DEST_PS:
1294 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1295 break;
1296 default:
1297 break;
1298 }
1299
1300 iwl_mvm_tx_status_check_trigger(mvm, status);
1301
1302 info->status.rates[0].count = tx_resp->failure_frame + 1;
1303 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1304 info);
1305 info->status.status_driver_data[1] =
1306 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1307
1308 /* Single frame failure in an AMPDU queue => send BAR */
1309 if (txq_id >= mvm->first_agg_queue &&
1310 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1311 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
1312 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1313
1314 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1315 if (status != TX_STATUS_SUCCESS) {
1316 struct ieee80211_hdr *hdr = (void *)skb->data;
1317 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1318 }
1319
1320 if (unlikely(!seq_ctl)) {
1321 struct ieee80211_hdr *hdr = (void *)skb->data;
1322
1323 /*
1324 * If it is an NDP, we can't update next_reclaim since
1325 * its sequence control is 0. Note that for that same
1326 * reason, NDPs are never sent to A-MPDU'able queues
1327 * so that we can never have more than one freed frame
1328 * for a single Tx resonse (see WARN_ON below).
1329 */
1330 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1331 is_ndp = true;
1332 }
1333
1334 /*
1335 * TODO: this is not accurate if we are freeing more than one
1336 * packet.
1337 */
1338 info->status.tx_time =
1339 le16_to_cpu(tx_resp->wireless_media_time);
1340 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1341 info->status.status_driver_data[0] =
1342 (void *)(uintptr_t)tx_resp->reduced_tpc;
1343
1344 ieee80211_tx_status(mvm->hw, skb);
1345 }
1346
1347 if (txq_id >= mvm->first_agg_queue) {
1348 /* If this is an aggregation queue, we use the ssn since:
1349 * ssn = wifi seq_num % 256.
1350 * The seq_ctl is the sequence control of the packet to which
1351 * this Tx response relates. But if there is a hole in the
1352 * bitmap of the BA we received, this Tx response may allow to
1353 * reclaim the hole and all the subsequent packets that were
1354 * already acked. In that case, seq_ctl != ssn, and the next
1355 * packet to be reclaimed will be ssn and not seq_ctl. In that
1356 * case, several packets will be reclaimed even if
1357 * frame_count = 1.
1358 *
1359 * The ssn is the index (% 256) of the latest packet that has
1360 * treated (acked / dropped) + 1.
1361 */
1362 next_reclaimed = ssn;
1363 } else {
1364 /* The next packet to be reclaimed is the one after this one */
1365 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
1366 }
1367
1368 IWL_DEBUG_TX_REPLY(mvm,
1369 "TXQ %d status %s (0x%08x)\n",
1370 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1371
1372 IWL_DEBUG_TX_REPLY(mvm,
1373 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1374 le32_to_cpu(tx_resp->initial_rate),
1375 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1376 ssn, next_reclaimed, seq_ctl);
1377
1378 rcu_read_lock();
1379
1380 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1381 /*
1382 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1383 * the firmware while we still have packets for it in the Tx queues.
1384 */
1385 if (WARN_ON_ONCE(!sta))
1386 goto out;
1387
1388 if (!IS_ERR(sta)) {
1389 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1390
1391 if (tid != IWL_TID_NON_QOS) {
1392 struct iwl_mvm_tid_data *tid_data =
1393 &mvmsta->tid_data[tid];
1394 bool send_eosp_ndp = false;
1395
1396 spin_lock_bh(&mvmsta->lock);
1397 if (iwl_mvm_is_dqa_supported(mvm)) {
1398 enum iwl_mvm_agg_state state;
1399
1400 state = mvmsta->tid_data[tid].state;
1401 txq_agg = (state == IWL_AGG_ON ||
1402 state == IWL_EMPTYING_HW_QUEUE_DELBA);
1403 } else {
1404 txq_agg = txq_id >= mvm->first_agg_queue;
1405 }
1406
1407 if (!is_ndp) {
1408 tid_data->next_reclaimed = next_reclaimed;
1409 IWL_DEBUG_TX_REPLY(mvm,
1410 "Next reclaimed packet:%d\n",
1411 next_reclaimed);
1412 } else {
1413 IWL_DEBUG_TX_REPLY(mvm,
1414 "NDP - don't update next_reclaimed\n");
1415 }
1416
1417 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1418
1419 if (mvmsta->sleep_tx_count) {
1420 mvmsta->sleep_tx_count--;
1421 if (mvmsta->sleep_tx_count &&
1422 !iwl_mvm_tid_queued(tid_data)) {
1423 /*
1424 * The number of frames in the queue
1425 * dropped to 0 even if we sent less
1426 * frames than we thought we had on the
1427 * Tx queue.
1428 * This means we had holes in the BA
1429 * window that we just filled, ask
1430 * mac80211 to send EOSP since the
1431 * firmware won't know how to do that.
1432 * Send NDP and the firmware will send
1433 * EOSP notification that will trigger
1434 * a call to ieee80211_sta_eosp().
1435 */
1436 send_eosp_ndp = true;
1437 }
1438 }
1439
1440 spin_unlock_bh(&mvmsta->lock);
1441 if (send_eosp_ndp) {
1442 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1443 IEEE80211_FRAME_RELEASE_UAPSD,
1444 1, tid, false, false);
1445 mvmsta->sleep_tx_count = 0;
1446 ieee80211_send_eosp_nullfunc(sta, tid);
1447 }
1448 }
1449
1450 if (mvmsta->next_status_eosp) {
1451 mvmsta->next_status_eosp = false;
1452 ieee80211_sta_eosp(sta);
1453 }
1454 } else {
1455 mvmsta = NULL;
1456 }
1457
1458 /*
1459 * If the txq is not an AMPDU queue, there is no chance we freed
1460 * several skbs. Check that out...
1461 */
1462 if (txq_agg)
1463 goto out;
1464
1465 /* We can't free more than one frame at once on a shared queue */
1466 WARN_ON(!iwl_mvm_is_dqa_supported(mvm) && (skb_freed > 1));
1467
1468 /* If we have still frames for this STA nothing to do here */
1469 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
1470 goto out;
1471
1472 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
1473
1474 /*
1475 * If there are no pending frames for this STA and
1476 * the tx to this station is not disabled, notify
1477 * mac80211 that this station can now wake up in its
1478 * STA table.
1479 * If mvmsta is not NULL, sta is valid.
1480 */
1481
1482 spin_lock_bh(&mvmsta->lock);
1483
1484 if (!mvmsta->disable_tx)
1485 ieee80211_sta_block_awake(mvm->hw, sta, false);
1486
1487 spin_unlock_bh(&mvmsta->lock);
1488 }
1489
1490 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
1491 /*
1492 * We are draining and this was the last packet - pre_rcu_remove
1493 * has been called already. We might be after the
1494 * synchronize_net already.
1495 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
1496 */
1497 set_bit(sta_id, mvm->sta_drained);
1498 schedule_work(&mvm->sta_drained_wk);
1499 }
1500
1501 out:
1502 rcu_read_unlock();
1503 }
1504
1505 #ifdef CONFIG_IWLWIFI_DEBUG
1506 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1507 static const char *iwl_get_agg_tx_status(u16 status)
1508 {
1509 switch (status & AGG_TX_STATE_STATUS_MSK) {
1510 AGG_TX_STATE_(TRANSMITTED);
1511 AGG_TX_STATE_(UNDERRUN);
1512 AGG_TX_STATE_(BT_PRIO);
1513 AGG_TX_STATE_(FEW_BYTES);
1514 AGG_TX_STATE_(ABORT);
1515 AGG_TX_STATE_(LAST_SENT_TTL);
1516 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1517 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1518 AGG_TX_STATE_(SCD_QUERY);
1519 AGG_TX_STATE_(TEST_BAD_CRC32);
1520 AGG_TX_STATE_(RESPONSE);
1521 AGG_TX_STATE_(DUMP_TX);
1522 AGG_TX_STATE_(DELAY_TX);
1523 }
1524
1525 return "UNKNOWN";
1526 }
1527
1528 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1529 struct iwl_rx_packet *pkt)
1530 {
1531 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1532 struct agg_tx_status *frame_status = &tx_resp->status;
1533 int i;
1534
1535 for (i = 0; i < tx_resp->frame_count; i++) {
1536 u16 fstatus = le16_to_cpu(frame_status[i].status);
1537
1538 IWL_DEBUG_TX_REPLY(mvm,
1539 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1540 iwl_get_agg_tx_status(fstatus),
1541 fstatus & AGG_TX_STATE_STATUS_MSK,
1542 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1543 AGG_TX_STATE_TRY_CNT_POS,
1544 le16_to_cpu(frame_status[i].sequence));
1545 }
1546 }
1547 #else
1548 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1549 struct iwl_rx_packet *pkt)
1550 {}
1551 #endif /* CONFIG_IWLWIFI_DEBUG */
1552
1553 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1554 struct iwl_rx_packet *pkt)
1555 {
1556 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1557 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1558 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1559 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1560 struct iwl_mvm_sta *mvmsta;
1561 int queue = SEQ_TO_QUEUE(sequence);
1562
1563 if (WARN_ON_ONCE(queue < mvm->first_agg_queue &&
1564 (!iwl_mvm_is_dqa_supported(mvm) ||
1565 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))))
1566 return;
1567
1568 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1569 return;
1570
1571 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1572
1573 rcu_read_lock();
1574
1575 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1576
1577 if (!WARN_ON_ONCE(!mvmsta)) {
1578 mvmsta->tid_data[tid].rate_n_flags =
1579 le32_to_cpu(tx_resp->initial_rate);
1580 mvmsta->tid_data[tid].tx_time =
1581 le16_to_cpu(tx_resp->wireless_media_time);
1582 }
1583
1584 rcu_read_unlock();
1585 }
1586
1587 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1588 {
1589 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1590 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1591
1592 if (tx_resp->frame_count == 1)
1593 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1594 else
1595 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1596 }
1597
1598 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1599 int txq, int index,
1600 struct ieee80211_tx_info *ba_info, u32 rate)
1601 {
1602 struct sk_buff_head reclaimed_skbs;
1603 struct iwl_mvm_tid_data *tid_data;
1604 struct ieee80211_sta *sta;
1605 struct iwl_mvm_sta *mvmsta;
1606 struct sk_buff *skb;
1607 int freed;
1608
1609 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1610 tid >= IWL_MAX_TID_COUNT,
1611 "sta_id %d tid %d", sta_id, tid))
1612 return;
1613
1614 rcu_read_lock();
1615
1616 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1617
1618 /* Reclaiming frames for a station that has been deleted ? */
1619 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1620 rcu_read_unlock();
1621 return;
1622 }
1623
1624 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1625 tid_data = &mvmsta->tid_data[tid];
1626
1627 if (tid_data->txq_id != txq) {
1628 IWL_ERR(mvm,
1629 "invalid BA notification: Q %d, tid %d\n",
1630 tid_data->txq_id, tid);
1631 rcu_read_unlock();
1632 return;
1633 }
1634
1635 spin_lock_bh(&mvmsta->lock);
1636
1637 __skb_queue_head_init(&reclaimed_skbs);
1638
1639 /*
1640 * Release all TFDs before the SSN, i.e. all TFDs in front of
1641 * block-ack window (we assume that they've been successfully
1642 * transmitted ... if not, it's too late anyway).
1643 */
1644 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1645
1646 tid_data->next_reclaimed = index;
1647
1648 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1649
1650 freed = 0;
1651 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1652
1653 skb_queue_walk(&reclaimed_skbs, skb) {
1654 struct ieee80211_hdr *hdr = (void *)skb->data;
1655 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1656
1657 if (ieee80211_is_data_qos(hdr->frame_control))
1658 freed++;
1659 else
1660 WARN_ON_ONCE(1);
1661
1662 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1663
1664 memset(&info->status, 0, sizeof(info->status));
1665 /* Packet was transmitted successfully, failures come as single
1666 * frames because before failing a frame the firmware transmits
1667 * it without aggregation at least once.
1668 */
1669 info->flags |= IEEE80211_TX_STAT_ACK;
1670
1671 /* this is the first skb we deliver in this batch */
1672 /* put the rate scaling data there */
1673 if (freed == 1) {
1674 info->flags |= IEEE80211_TX_STAT_AMPDU;
1675 memcpy(&info->status, &ba_info->status,
1676 sizeof(ba_info->status));
1677 iwl_mvm_hwrate_to_tx_status(rate, info);
1678 }
1679 }
1680
1681 spin_unlock_bh(&mvmsta->lock);
1682
1683 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1684 * possible (i.e. first MPDU in the aggregation wasn't acked)
1685 * Still it's important to update RS about sent vs. acked.
1686 */
1687 if (skb_queue_empty(&reclaimed_skbs)) {
1688 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1689
1690 if (mvmsta->vif)
1691 chanctx_conf =
1692 rcu_dereference(mvmsta->vif->chanctx_conf);
1693
1694 if (WARN_ON_ONCE(!chanctx_conf))
1695 goto out;
1696
1697 ba_info->band = chanctx_conf->def.chan->band;
1698 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1699
1700 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1701 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1702 }
1703
1704 out:
1705 rcu_read_unlock();
1706
1707 while (!skb_queue_empty(&reclaimed_skbs)) {
1708 skb = __skb_dequeue(&reclaimed_skbs);
1709 ieee80211_tx_status(mvm->hw, skb);
1710 }
1711 }
1712
1713 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1714 {
1715 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1716 int sta_id, tid, txq, index;
1717 struct ieee80211_tx_info ba_info = {};
1718 struct iwl_mvm_ba_notif *ba_notif;
1719 struct iwl_mvm_tid_data *tid_data;
1720 struct iwl_mvm_sta *mvmsta;
1721
1722 if (iwl_mvm_has_new_tx_api(mvm)) {
1723 struct iwl_mvm_compressed_ba_notif *ba_res =
1724 (void *)pkt->data;
1725
1726 sta_id = ba_res->sta_id;
1727 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1728 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1729 ba_info.status.tx_time =
1730 (u16)le32_to_cpu(ba_res->wireless_time);
1731 ba_info.status.status_driver_data[0] =
1732 (void *)(uintptr_t)ba_res->reduced_txp;
1733
1734 /*
1735 * TODO:
1736 * When supporting multi TID aggregations - we need to move
1737 * next_reclaimed to be per TXQ and not per TID or handle it
1738 * in a different way.
1739 * This will go together with SN and AddBA offload and cannot
1740 * be handled properly for now.
1741 */
1742 WARN_ON(le16_to_cpu(ba_res->tfd_cnt) != 1);
1743 iwl_mvm_tx_reclaim(mvm, sta_id, ba_res->ra_tid[0].tid,
1744 (int)ba_res->tfd[0].q_num,
1745 le16_to_cpu(ba_res->tfd[0].tfd_index),
1746 &ba_info, le32_to_cpu(ba_res->tx_rate));
1747
1748 IWL_DEBUG_TX_REPLY(mvm,
1749 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1750 sta_id, le32_to_cpu(ba_res->flags),
1751 le16_to_cpu(ba_res->txed),
1752 le16_to_cpu(ba_res->done));
1753 return;
1754 }
1755
1756 ba_notif = (void *)pkt->data;
1757 sta_id = ba_notif->sta_id;
1758 tid = ba_notif->tid;
1759 /* "flow" corresponds to Tx queue */
1760 txq = le16_to_cpu(ba_notif->scd_flow);
1761 /* "ssn" is start of block-ack Tx window, corresponds to index
1762 * (in Tx queue's circular buffer) of first TFD/frame in window */
1763 index = le16_to_cpu(ba_notif->scd_ssn);
1764
1765 rcu_read_lock();
1766 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1767 if (WARN_ON_ONCE(!mvmsta)) {
1768 rcu_read_unlock();
1769 return;
1770 }
1771
1772 tid_data = &mvmsta->tid_data[tid];
1773
1774 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1775 ba_info.status.ampdu_len = ba_notif->txed;
1776 ba_info.status.tx_time = tid_data->tx_time;
1777 ba_info.status.status_driver_data[0] =
1778 (void *)(uintptr_t)ba_notif->reduced_txp;
1779
1780 rcu_read_unlock();
1781
1782 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1783 tid_data->rate_n_flags);
1784
1785 IWL_DEBUG_TX_REPLY(mvm,
1786 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1787 (u8 *)&ba_notif->sta_addr_lo32, ba_notif->sta_id);
1788
1789 IWL_DEBUG_TX_REPLY(mvm,
1790 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1791 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1792 le64_to_cpu(ba_notif->bitmap), txq, index,
1793 ba_notif->txed, ba_notif->txed_2_done);
1794
1795 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1796 ba_notif->reduced_txp);
1797 }
1798
1799 /*
1800 * Note that there are transports that buffer frames before they reach
1801 * the firmware. This means that after flush_tx_path is called, the
1802 * queue might not be empty. The race-free way to handle this is to:
1803 * 1) set the station as draining
1804 * 2) flush the Tx path
1805 * 3) wait for the transport queues to be empty
1806 */
1807 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1808 {
1809 int ret;
1810 struct iwl_tx_path_flush_cmd flush_cmd = {
1811 .queues_ctl = cpu_to_le32(tfd_msk),
1812 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1813 };
1814
1815 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1816 sizeof(flush_cmd), &flush_cmd);
1817 if (ret)
1818 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1819 return ret;
1820 }
(deprecated) Btrfs devel tree