]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/net/wireless/intel/iwlwifi/mvm/tx.c
projects / mirror_ubuntu-bionic-kernel.git / blob
? search:


c7ca6bd3129c9af2d10bdbb906ee686434a9d28a
[mirror_ubuntu-bionic-kernel.git] / drivers / net / wireless / intel / iwlwifi / mvm / tx.c
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * USA
25 *
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
28 *
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32 *
33 * BSD LICENSE
34 *
35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
37 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
38 * All rights reserved.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 *
44 * * Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * * Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in
48 * the documentation and/or other materials provided with the
49 * distribution.
50 * * Neither the name Intel Corporation nor the names of its
51 * contributors may be used to endorse or promote products derived
52 * from this software without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
65 *
66 *****************************************************************************/
67 #include <linux/ieee80211.h>
68 #include <linux/etherdevice.h>
69 #include <linux/tcp.h>
70 #include <net/ip.h>
71 #include <net/ipv6.h>
72
73 #include "iwl-trans.h"
74 #include "iwl-eeprom-parse.h"
75 #include "mvm.h"
76 #include "sta.h"
77 #include "fw-dbg.h"
78
79 static void
80 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
81 u16 tid, u16 ssn)
82 {
83 struct iwl_fw_dbg_trigger_tlv *trig;
84 struct iwl_fw_dbg_trigger_ba *ba_trig;
85
86 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
87 return;
88
89 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
90 ba_trig = (void *)trig->data;
91
92 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
93 return;
94
95 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
96 return;
97
98 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
99 "BAR sent to %pM, tid %d, ssn %d",
100 addr, tid, ssn);
101 }
102
103 #define OPT_HDR(type, skb, off) \
104 (type *)(skb_network_header(skb) + (off))
105
106 static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
107 struct ieee80211_hdr *hdr,
108 struct ieee80211_tx_info *info,
109 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->fwrt.smem_cfg.lmac[0].txfifo_size[txf] -
765 256);
766
767 if (unlikely(dbg_max_amsdu_len))
768 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
769 dbg_max_amsdu_len);
770
771 /*
772 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
773 * supported. This is a spec requirement (IEEE 802.11-2015
774 * section 8.7.3 NOTE 3).
775 */
776 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
777 !sta->vht_cap.vht_supported)
778 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
779
780 /* Sub frame header + SNAP + IP header + TCP header + MSS */
781 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
782 pad = (4 - subf_len) & 0x3;
783
784 /*
785 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
786 * N * subf_len + (N - 1) * pad.
787 */
788 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
789 if (num_subframes > 1)
790 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
791
792 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
793 tcp_hdrlen(skb) + skb->data_len;
794
795 /*
796 * Make sure we have enough TBs for the A-MSDU:
797 * 2 for each subframe
798 * 1 more for each fragment
799 * 1 more for the potential data in the header
800 */
801 num_subframes =
802 min_t(unsigned int, num_subframes,
803 (mvm->trans->max_skb_frags - 1 -
804 skb_shinfo(skb)->nr_frags) / 2);
805
806 /* This skb fits in one single A-MSDU */
807 if (num_subframes * mss >= tcp_payload_len) {
808 __skb_queue_tail(mpdus_skb, skb);
809 return 0;
810 }
811
812 /*
813 * Trick the segmentation function to make it
814 * create SKBs that can fit into one A-MSDU.
815 */
816 segment:
817 skb_shinfo(skb)->gso_size = num_subframes * mss;
818 memcpy(cb, skb->cb, sizeof(cb));
819
820 next = skb_gso_segment(skb, netdev_features);
821 skb_shinfo(skb)->gso_size = mss;
822 if (WARN_ON_ONCE(IS_ERR(next)))
823 return -EINVAL;
824 else if (next)
825 consume_skb(skb);
826
827 while (next) {
828 tmp = next;
829 next = tmp->next;
830
831 memcpy(tmp->cb, cb, sizeof(tmp->cb));
832 /*
833 * Compute the length of all the data added for the A-MSDU.
834 * This will be used to compute the length to write in the TX
835 * command. We have: SNAP + IP + TCP for n -1 subframes and
836 * ETH header for n subframes.
837 */
838 tcp_payload_len = skb_tail_pointer(tmp) -
839 skb_transport_header(tmp) -
840 tcp_hdrlen(tmp) + tmp->data_len;
841
842 if (ipv4)
843 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
844
845 if (tcp_payload_len > mss) {
846 skb_shinfo(tmp)->gso_size = mss;
847 } else {
848 if (ieee80211_is_data_qos(hdr->frame_control)) {
849 qc = ieee80211_get_qos_ctl((void *)tmp->data);
850
851 if (ipv4)
852 ip_send_check(ip_hdr(tmp));
853 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
854 }
855 skb_shinfo(tmp)->gso_size = 0;
856 }
857
858 tmp->prev = NULL;
859 tmp->next = NULL;
860
861 __skb_queue_tail(mpdus_skb, tmp);
862 i++;
863 }
864
865 return 0;
866 }
867 #else /* CONFIG_INET */
868 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
869 struct ieee80211_tx_info *info,
870 struct ieee80211_sta *sta,
871 struct sk_buff_head *mpdus_skb)
872 {
873 /* Impossible to get TSO with CONFIG_INET */
874 WARN_ON(1);
875
876 return -1;
877 }
878 #endif
879
880 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
881 struct iwl_mvm_sta *mvm_sta, u8 tid,
882 struct sk_buff *skb)
883 {
884 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
885 u8 mac_queue = info->hw_queue;
886 struct sk_buff_head *deferred_tx_frames;
887
888 lockdep_assert_held(&mvm_sta->lock);
889
890 mvm_sta->deferred_traffic_tid_map |= BIT(tid);
891 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);
892
893 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;
894
895 skb_queue_tail(deferred_tx_frames, skb);
896
897 /*
898 * The first deferred frame should've stopped the MAC queues, so we
899 * should never get a second deferred frame for the RA/TID.
900 */
901 if (!WARN(skb_queue_len(deferred_tx_frames) != 1,
902 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid,
903 skb_queue_len(deferred_tx_frames))) {
904 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
905 schedule_work(&mvm->add_stream_wk);
906 }
907 }
908
909 /* Check if there are any timed-out TIDs on a given shared TXQ */
910 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
911 {
912 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
913 unsigned long now = jiffies;
914 int tid;
915
916 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
917 return false;
918
919 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
920 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
921 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
922 return true;
923 }
924
925 return false;
926 }
927
928 /*
929 * Sets the fields in the Tx cmd that are crypto related
930 */
931 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
932 struct ieee80211_tx_info *info,
933 struct ieee80211_sta *sta)
934 {
935 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
936 struct iwl_mvm_sta *mvmsta;
937 struct iwl_device_cmd *dev_cmd;
938 __le16 fc;
939 u16 seq_number = 0;
940 u8 tid = IWL_MAX_TID_COUNT;
941 u16 txq_id = info->hw_queue;
942 bool is_ampdu = false;
943 int hdrlen;
944
945 mvmsta = iwl_mvm_sta_from_mac80211(sta);
946 fc = hdr->frame_control;
947 hdrlen = ieee80211_hdrlen(fc);
948
949 if (WARN_ON_ONCE(!mvmsta))
950 return -1;
951
952 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
953 return -1;
954
955 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
956 sta, mvmsta->sta_id);
957 if (!dev_cmd)
958 goto drop;
959
960 /*
961 * we handle that entirely ourselves -- for uAPSD the firmware
962 * will always send a notification, and for PS-Poll responses
963 * we'll notify mac80211 when getting frame status
964 */
965 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
966
967 spin_lock(&mvmsta->lock);
968
969 /* nullfunc frames should go to the MGMT queue regardless of QOS,
970 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
971 * assignment of MGMT TID
972 */
973 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
974 u8 *qc = NULL;
975 qc = ieee80211_get_qos_ctl(hdr);
976 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
977 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
978 goto drop_unlock_sta;
979
980 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
981 if (WARN_ON_ONCE(is_ampdu &&
982 mvmsta->tid_data[tid].state != IWL_AGG_ON))
983 goto drop_unlock_sta;
984
985 seq_number = mvmsta->tid_data[tid].seq_number;
986 seq_number &= IEEE80211_SCTL_SEQ;
987
988 if (!iwl_mvm_has_new_tx_api(mvm)) {
989 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
990
991 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
992 hdr->seq_ctrl |= cpu_to_le16(seq_number);
993 /* update the tx_cmd hdr as it was already copied */
994 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
995 }
996 }
997
998 if (iwl_mvm_is_dqa_supported(mvm) || is_ampdu)
999 txq_id = mvmsta->tid_data[tid].txq_id;
1000
1001 if (sta->tdls && !iwl_mvm_is_dqa_supported(mvm)) {
1002 /* default to TID 0 for non-QoS packets */
1003 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
1004
1005 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
1006 }
1007
1008 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1009
1010 /* Check if TXQ needs to be allocated or re-activated */
1011 if (unlikely(txq_id == IWL_MVM_INVALID_QUEUE ||
1012 !mvmsta->tid_data[tid].is_tid_active) &&
1013 iwl_mvm_is_dqa_supported(mvm)) {
1014 /* If TXQ needs to be allocated... */
1015 if (txq_id == IWL_MVM_INVALID_QUEUE) {
1016 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);
1017
1018 /*
1019 * The frame is now deferred, and the worker scheduled
1020 * will re-allocate it, so we can free it for now.
1021 */
1022 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1023 spin_unlock(&mvmsta->lock);
1024 return 0;
1025 }
1026
1027 /* queue should always be active in new TX path */
1028 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
1029
1030 /* If we are here - TXQ exists and needs to be re-activated */
1031 spin_lock(&mvm->queue_info_lock);
1032 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1033 mvmsta->tid_data[tid].is_tid_active = true;
1034 spin_unlock(&mvm->queue_info_lock);
1035
1036 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n",
1037 txq_id);
1038 }
1039
1040 if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) {
1041 /* Keep track of the time of the last frame for this RA/TID */
1042 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1043
1044 /*
1045 * If we have timed-out TIDs - schedule the worker that will
1046 * reconfig the queues and update them
1047 *
1048 * Note that the mvm->queue_info_lock isn't being taken here in
1049 * order to not serialize the TX flow. This isn't dangerous
1050 * because scheduling mvm->add_stream_wk can't ruin the state,
1051 * and if we DON'T schedule it due to some race condition then
1052 * next TX we get here we will.
1053 */
1054 if (unlikely(mvm->queue_info[txq_id].status ==
1055 IWL_MVM_QUEUE_SHARED &&
1056 iwl_mvm_txq_should_update(mvm, txq_id)))
1057 schedule_work(&mvm->add_stream_wk);
1058 }
1059
1060 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
1061 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
1062
1063 /* From now on, we cannot access info->control */
1064 iwl_mvm_skb_prepare_status(skb, dev_cmd);
1065
1066 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1067 goto drop_unlock_sta;
1068
1069 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1070 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1071
1072 spin_unlock(&mvmsta->lock);
1073
1074 /* Increase pending frames count if this isn't AMPDU or DQA queue */
1075 if (!iwl_mvm_is_dqa_supported(mvm) && !is_ampdu)
1076 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
1077
1078 return 0;
1079
1080 drop_unlock_sta:
1081 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1082 spin_unlock(&mvmsta->lock);
1083 drop:
1084 return -1;
1085 }
1086
1087 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
1088 struct ieee80211_sta *sta)
1089 {
1090 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1091 struct ieee80211_tx_info info;
1092 struct sk_buff_head mpdus_skbs;
1093 unsigned int payload_len;
1094 int ret;
1095
1096 if (WARN_ON_ONCE(!mvmsta))
1097 return -1;
1098
1099 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1100 return -1;
1101
1102 memcpy(&info, skb->cb, sizeof(info));
1103
1104 if (!skb_is_gso(skb))
1105 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1106
1107 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1108 tcp_hdrlen(skb) + skb->data_len;
1109
1110 if (payload_len <= skb_shinfo(skb)->gso_size)
1111 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1112
1113 __skb_queue_head_init(&mpdus_skbs);
1114
1115 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1116 if (ret)
1117 return ret;
1118
1119 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1120 return ret;
1121
1122 while (!skb_queue_empty(&mpdus_skbs)) {
1123 skb = __skb_dequeue(&mpdus_skbs);
1124
1125 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1126 if (ret) {
1127 __skb_queue_purge(&mpdus_skbs);
1128 return ret;
1129 }
1130 }
1131
1132 return 0;
1133 }
1134
1135 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1136 struct ieee80211_sta *sta, u8 tid)
1137 {
1138 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1139 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1140 struct ieee80211_vif *vif = mvmsta->vif;
1141 u16 normalized_ssn;
1142
1143 lockdep_assert_held(&mvmsta->lock);
1144
1145 if ((tid_data->state == IWL_AGG_ON ||
1146 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA ||
1147 iwl_mvm_is_dqa_supported(mvm)) &&
1148 iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1149 /*
1150 * Now that this aggregation or DQA queue is empty tell
1151 * mac80211 so it knows we no longer have frames buffered for
1152 * the station on this TID (for the TIM bitmap calculation.)
1153 */
1154 ieee80211_sta_set_buffered(sta, tid, false);
1155 }
1156
1157 /*
1158 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
1159 * to align the wrap around of ssn so we compare relevant values.
1160 */
1161 normalized_ssn = tid_data->ssn;
1162 if (mvm->trans->cfg->gen2)
1163 normalized_ssn &= 0xff;
1164
1165 if (normalized_ssn != tid_data->next_reclaimed)
1166 return;
1167
1168 switch (tid_data->state) {
1169 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1170 IWL_DEBUG_TX_QUEUES(mvm,
1171 "Can continue addBA flow ssn = next_recl = %d\n",
1172 tid_data->next_reclaimed);
1173 tid_data->state = IWL_AGG_STARTING;
1174 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1175 break;
1176
1177 case IWL_EMPTYING_HW_QUEUE_DELBA:
1178 IWL_DEBUG_TX_QUEUES(mvm,
1179 "Can continue DELBA flow ssn = next_recl = %d\n",
1180 tid_data->next_reclaimed);
1181 if (!iwl_mvm_is_dqa_supported(mvm)) {
1182 u8 mac80211_ac = tid_to_mac80211_ac[tid];
1183
1184 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
1185 vif->hw_queue[mac80211_ac], tid,
1186 CMD_ASYNC);
1187 }
1188 tid_data->state = IWL_AGG_OFF;
1189 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1190 break;
1191
1192 default:
1193 break;
1194 }
1195 }
1196
1197 #ifdef CONFIG_IWLWIFI_DEBUG
1198 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1199 {
1200 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1201 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1202
1203 switch (status & TX_STATUS_MSK) {
1204 case TX_STATUS_SUCCESS:
1205 return "SUCCESS";
1206 TX_STATUS_POSTPONE(DELAY);
1207 TX_STATUS_POSTPONE(FEW_BYTES);
1208 TX_STATUS_POSTPONE(BT_PRIO);
1209 TX_STATUS_POSTPONE(QUIET_PERIOD);
1210 TX_STATUS_POSTPONE(CALC_TTAK);
1211 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1212 TX_STATUS_FAIL(SHORT_LIMIT);
1213 TX_STATUS_FAIL(LONG_LIMIT);
1214 TX_STATUS_FAIL(UNDERRUN);
1215 TX_STATUS_FAIL(DRAIN_FLOW);
1216 TX_STATUS_FAIL(RFKILL_FLUSH);
1217 TX_STATUS_FAIL(LIFE_EXPIRE);
1218 TX_STATUS_FAIL(DEST_PS);
1219 TX_STATUS_FAIL(HOST_ABORTED);
1220 TX_STATUS_FAIL(BT_RETRY);
1221 TX_STATUS_FAIL(STA_INVALID);
1222 TX_STATUS_FAIL(FRAG_DROPPED);
1223 TX_STATUS_FAIL(TID_DISABLE);
1224 TX_STATUS_FAIL(FIFO_FLUSHED);
1225 TX_STATUS_FAIL(SMALL_CF_POLL);
1226 TX_STATUS_FAIL(FW_DROP);
1227 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1228 }
1229
1230 return "UNKNOWN";
1231
1232 #undef TX_STATUS_FAIL
1233 #undef TX_STATUS_POSTPONE
1234 }
1235 #endif /* CONFIG_IWLWIFI_DEBUG */
1236
1237 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1238 enum nl80211_band band,
1239 struct ieee80211_tx_rate *r)
1240 {
1241 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1242 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1243 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1244 case RATE_MCS_CHAN_WIDTH_20:
1245 break;
1246 case RATE_MCS_CHAN_WIDTH_40:
1247 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1248 break;
1249 case RATE_MCS_CHAN_WIDTH_80:
1250 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1251 break;
1252 case RATE_MCS_CHAN_WIDTH_160:
1253 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1254 break;
1255 }
1256 if (rate_n_flags & RATE_MCS_SGI_MSK)
1257 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1258 if (rate_n_flags & RATE_MCS_HT_MSK) {
1259 r->flags |= IEEE80211_TX_RC_MCS;
1260 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1261 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1262 ieee80211_rate_set_vht(
1263 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1264 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1265 RATE_VHT_MCS_NSS_POS) + 1);
1266 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1267 } else {
1268 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1269 band);
1270 }
1271 }
1272
1273 /**
1274 * translate ucode response to mac80211 tx status control values
1275 */
1276 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1277 struct ieee80211_tx_info *info)
1278 {
1279 struct ieee80211_tx_rate *r = &info->status.rates[0];
1280
1281 info->status.antenna =
1282 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1283 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1284 }
1285
1286 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1287 u32 status)
1288 {
1289 struct iwl_fw_dbg_trigger_tlv *trig;
1290 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1291 int i;
1292
1293 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
1294 return;
1295
1296 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
1297 status_trig = (void *)trig->data;
1298
1299 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
1300 return;
1301
1302 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1303 /* don't collect on status 0 */
1304 if (!status_trig->statuses[i].status)
1305 break;
1306
1307 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1308 continue;
1309
1310 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
1311 "Tx status %d was received",
1312 status & TX_STATUS_MSK);
1313 break;
1314 }
1315 }
1316
1317 /**
1318 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1319 * @tx_resp: the Tx response from the fw (agg or non-agg)
1320 *
1321 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1322 * it can't know that everything will go well until the end of the AMPDU, it
1323 * can't know in advance the number of MPDUs that will be sent in the current
1324 * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1325 * Hence, it can't know in advance what the SSN of the SCD will be at the end
1326 * of the batch. This is why the SSN of the SCD is written at the end of the
1327 * whole struct at a variable offset. This function knows how to cope with the
1328 * variable offset and returns the SSN of the SCD.
1329 */
1330 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1331 struct iwl_mvm_tx_resp *tx_resp)
1332 {
1333 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1334 tx_resp->frame_count) & 0xfff;
1335 }
1336
1337 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1338 struct iwl_rx_packet *pkt)
1339 {
1340 struct ieee80211_sta *sta;
1341 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1342 int txq_id = SEQ_TO_QUEUE(sequence);
1343 /* struct iwl_mvm_tx_resp_v3 is almost the same */
1344 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1345 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1346 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1347 struct agg_tx_status *agg_status =
1348 iwl_mvm_get_agg_status(mvm, tx_resp);
1349 u32 status = le16_to_cpu(agg_status->status);
1350 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1351 struct iwl_mvm_sta *mvmsta;
1352 struct sk_buff_head skbs;
1353 u8 skb_freed = 0;
1354 u8 lq_color;
1355 u16 next_reclaimed, seq_ctl;
1356 bool is_ndp = false;
1357
1358 __skb_queue_head_init(&skbs);
1359
1360 if (iwl_mvm_has_new_tx_api(mvm))
1361 txq_id = le16_to_cpu(tx_resp->tx_queue);
1362
1363 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1364
1365 /* we can free until ssn % q.n_bd not inclusive */
1366 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1367
1368 while (!skb_queue_empty(&skbs)) {
1369 struct sk_buff *skb = __skb_dequeue(&skbs);
1370 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1371
1372 skb_freed++;
1373
1374 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1375
1376 memset(&info->status, 0, sizeof(info->status));
1377
1378 /* inform mac80211 about what happened with the frame */
1379 switch (status & TX_STATUS_MSK) {
1380 case TX_STATUS_SUCCESS:
1381 case TX_STATUS_DIRECT_DONE:
1382 info->flags |= IEEE80211_TX_STAT_ACK;
1383 break;
1384 case TX_STATUS_FAIL_DEST_PS:
1385 /* In DQA, the FW should have stopped the queue and not
1386 * return this status
1387 */
1388 WARN_ON(iwl_mvm_is_dqa_supported(mvm));
1389 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1390 break;
1391 default:
1392 break;
1393 }
1394
1395 iwl_mvm_tx_status_check_trigger(mvm, status);
1396
1397 info->status.rates[0].count = tx_resp->failure_frame + 1;
1398 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1399 info);
1400 info->status.status_driver_data[1] =
1401 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1402
1403 /* Single frame failure in an AMPDU queue => send BAR */
1404 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1405 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1406 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
1407 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1408 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1409
1410 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1411 if (status != TX_STATUS_SUCCESS) {
1412 struct ieee80211_hdr *hdr = (void *)skb->data;
1413 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1414 }
1415
1416 if (unlikely(!seq_ctl)) {
1417 struct ieee80211_hdr *hdr = (void *)skb->data;
1418
1419 /*
1420 * If it is an NDP, we can't update next_reclaim since
1421 * its sequence control is 0. Note that for that same
1422 * reason, NDPs are never sent to A-MPDU'able queues
1423 * so that we can never have more than one freed frame
1424 * for a single Tx resonse (see WARN_ON below).
1425 */
1426 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1427 is_ndp = true;
1428 }
1429
1430 /*
1431 * TODO: this is not accurate if we are freeing more than one
1432 * packet.
1433 */
1434 info->status.tx_time =
1435 le16_to_cpu(tx_resp->wireless_media_time);
1436 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1437 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1438 info->status.status_driver_data[0] =
1439 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1440
1441 ieee80211_tx_status(mvm->hw, skb);
1442 }
1443
1444 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue) {
1445 /* If this is an aggregation queue, we use the ssn since:
1446 * ssn = wifi seq_num % 256.
1447 * The seq_ctl is the sequence control of the packet to which
1448 * this Tx response relates. But if there is a hole in the
1449 * bitmap of the BA we received, this Tx response may allow to
1450 * reclaim the hole and all the subsequent packets that were
1451 * already acked. In that case, seq_ctl != ssn, and the next
1452 * packet to be reclaimed will be ssn and not seq_ctl. In that
1453 * case, several packets will be reclaimed even if
1454 * frame_count = 1.
1455 *
1456 * The ssn is the index (% 256) of the latest packet that has
1457 * treated (acked / dropped) + 1.
1458 */
1459 next_reclaimed = ssn;
1460 } else {
1461 /* The next packet to be reclaimed is the one after this one */
1462 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
1463 }
1464
1465 IWL_DEBUG_TX_REPLY(mvm,
1466 "TXQ %d status %s (0x%08x)\n",
1467 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1468
1469 IWL_DEBUG_TX_REPLY(mvm,
1470 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1471 le32_to_cpu(tx_resp->initial_rate),
1472 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1473 ssn, next_reclaimed, seq_ctl);
1474
1475 rcu_read_lock();
1476
1477 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1478 /*
1479 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1480 * the firmware while we still have packets for it in the Tx queues.
1481 */
1482 if (WARN_ON_ONCE(!sta))
1483 goto out;
1484
1485 if (!IS_ERR(sta)) {
1486 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1487
1488 if (tid != IWL_TID_NON_QOS && tid != IWL_MGMT_TID) {
1489 struct iwl_mvm_tid_data *tid_data =
1490 &mvmsta->tid_data[tid];
1491 bool send_eosp_ndp = false;
1492
1493 spin_lock_bh(&mvmsta->lock);
1494
1495 if (!is_ndp) {
1496 tid_data->next_reclaimed = next_reclaimed;
1497 IWL_DEBUG_TX_REPLY(mvm,
1498 "Next reclaimed packet:%d\n",
1499 next_reclaimed);
1500 } else {
1501 IWL_DEBUG_TX_REPLY(mvm,
1502 "NDP - don't update next_reclaimed\n");
1503 }
1504
1505 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1506
1507 if (mvmsta->sleep_tx_count) {
1508 mvmsta->sleep_tx_count--;
1509 if (mvmsta->sleep_tx_count &&
1510 !iwl_mvm_tid_queued(mvm, tid_data)) {
1511 /*
1512 * The number of frames in the queue
1513 * dropped to 0 even if we sent less
1514 * frames than we thought we had on the
1515 * Tx queue.
1516 * This means we had holes in the BA
1517 * window that we just filled, ask
1518 * mac80211 to send EOSP since the
1519 * firmware won't know how to do that.
1520 * Send NDP and the firmware will send
1521 * EOSP notification that will trigger
1522 * a call to ieee80211_sta_eosp().
1523 */
1524 send_eosp_ndp = true;
1525 }
1526 }
1527
1528 spin_unlock_bh(&mvmsta->lock);
1529 if (send_eosp_ndp) {
1530 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1531 IEEE80211_FRAME_RELEASE_UAPSD,
1532 1, tid, false, false);
1533 mvmsta->sleep_tx_count = 0;
1534 ieee80211_send_eosp_nullfunc(sta, tid);
1535 }
1536 }
1537
1538 if (mvmsta->next_status_eosp) {
1539 mvmsta->next_status_eosp = false;
1540 ieee80211_sta_eosp(sta);
1541 }
1542 } else {
1543 mvmsta = NULL;
1544 }
1545
1546 /*
1547 * If the txq is not an AMPDU queue, there is no chance we freed
1548 * several skbs. Check that out...
1549 */
1550 if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue)
1551 goto out;
1552
1553 /* We can't free more than one frame at once on a shared queue */
1554 WARN_ON(skb_freed > 1);
1555
1556 /* If we have still frames for this STA nothing to do here */
1557 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
1558 goto out;
1559
1560 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
1561
1562 /*
1563 * If there are no pending frames for this STA and
1564 * the tx to this station is not disabled, notify
1565 * mac80211 that this station can now wake up in its
1566 * STA table.
1567 * If mvmsta is not NULL, sta is valid.
1568 */
1569
1570 spin_lock_bh(&mvmsta->lock);
1571
1572 if (!mvmsta->disable_tx)
1573 ieee80211_sta_block_awake(mvm->hw, sta, false);
1574
1575 spin_unlock_bh(&mvmsta->lock);
1576 }
1577
1578 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
1579 /*
1580 * We are draining and this was the last packet - pre_rcu_remove
1581 * has been called already. We might be after the
1582 * synchronize_net already.
1583 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
1584 */
1585 set_bit(sta_id, mvm->sta_drained);
1586 schedule_work(&mvm->sta_drained_wk);
1587 }
1588
1589 out:
1590 rcu_read_unlock();
1591 }
1592
1593 #ifdef CONFIG_IWLWIFI_DEBUG
1594 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1595 static const char *iwl_get_agg_tx_status(u16 status)
1596 {
1597 switch (status & AGG_TX_STATE_STATUS_MSK) {
1598 AGG_TX_STATE_(TRANSMITTED);
1599 AGG_TX_STATE_(UNDERRUN);
1600 AGG_TX_STATE_(BT_PRIO);
1601 AGG_TX_STATE_(FEW_BYTES);
1602 AGG_TX_STATE_(ABORT);
1603 AGG_TX_STATE_(LAST_SENT_TTL);
1604 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1605 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1606 AGG_TX_STATE_(SCD_QUERY);
1607 AGG_TX_STATE_(TEST_BAD_CRC32);
1608 AGG_TX_STATE_(RESPONSE);
1609 AGG_TX_STATE_(DUMP_TX);
1610 AGG_TX_STATE_(DELAY_TX);
1611 }
1612
1613 return "UNKNOWN";
1614 }
1615
1616 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1617 struct iwl_rx_packet *pkt)
1618 {
1619 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1620 struct agg_tx_status *frame_status =
1621 iwl_mvm_get_agg_status(mvm, tx_resp);
1622 int i;
1623
1624 for (i = 0; i < tx_resp->frame_count; i++) {
1625 u16 fstatus = le16_to_cpu(frame_status[i].status);
1626
1627 IWL_DEBUG_TX_REPLY(mvm,
1628 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1629 iwl_get_agg_tx_status(fstatus),
1630 fstatus & AGG_TX_STATE_STATUS_MSK,
1631 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1632 AGG_TX_STATE_TRY_CNT_POS,
1633 le16_to_cpu(frame_status[i].sequence));
1634 }
1635 }
1636 #else
1637 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1638 struct iwl_rx_packet *pkt)
1639 {}
1640 #endif /* CONFIG_IWLWIFI_DEBUG */
1641
1642 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1643 struct iwl_rx_packet *pkt)
1644 {
1645 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1646 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1647 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1648 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1649 struct iwl_mvm_sta *mvmsta;
1650 int queue = SEQ_TO_QUEUE(sequence);
1651
1652 if (WARN_ON_ONCE(queue < mvm->first_agg_queue &&
1653 (!iwl_mvm_is_dqa_supported(mvm) ||
1654 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))))
1655 return;
1656
1657 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1658 return;
1659
1660 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1661
1662 rcu_read_lock();
1663
1664 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1665
1666 if (!WARN_ON_ONCE(!mvmsta)) {
1667 mvmsta->tid_data[tid].rate_n_flags =
1668 le32_to_cpu(tx_resp->initial_rate);
1669 mvmsta->tid_data[tid].tx_time =
1670 le16_to_cpu(tx_resp->wireless_media_time);
1671 mvmsta->tid_data[tid].lq_color =
1672 (tx_resp->tlc_info & TX_RES_RATE_TABLE_COLOR_MSK) >>
1673 TX_RES_RATE_TABLE_COLOR_POS;
1674 }
1675
1676 rcu_read_unlock();
1677 }
1678
1679 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1680 {
1681 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1682 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1683
1684 if (tx_resp->frame_count == 1)
1685 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1686 else
1687 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1688 }
1689
1690 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1691 int txq, int index,
1692 struct ieee80211_tx_info *ba_info, u32 rate)
1693 {
1694 struct sk_buff_head reclaimed_skbs;
1695 struct iwl_mvm_tid_data *tid_data;
1696 struct ieee80211_sta *sta;
1697 struct iwl_mvm_sta *mvmsta;
1698 struct sk_buff *skb;
1699 int freed;
1700
1701 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1702 tid >= IWL_MAX_TID_COUNT,
1703 "sta_id %d tid %d", sta_id, tid))
1704 return;
1705
1706 rcu_read_lock();
1707
1708 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1709
1710 /* Reclaiming frames for a station that has been deleted ? */
1711 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1712 rcu_read_unlock();
1713 return;
1714 }
1715
1716 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1717 tid_data = &mvmsta->tid_data[tid];
1718
1719 if (tid_data->txq_id != txq) {
1720 IWL_ERR(mvm,
1721 "invalid BA notification: Q %d, tid %d\n",
1722 tid_data->txq_id, tid);
1723 rcu_read_unlock();
1724 return;
1725 }
1726
1727 spin_lock_bh(&mvmsta->lock);
1728
1729 __skb_queue_head_init(&reclaimed_skbs);
1730
1731 /*
1732 * Release all TFDs before the SSN, i.e. all TFDs in front of
1733 * block-ack window (we assume that they've been successfully
1734 * transmitted ... if not, it's too late anyway).
1735 */
1736 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1737
1738 tid_data->next_reclaimed = index;
1739
1740 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1741
1742 freed = 0;
1743
1744 /* pack lq color from tid_data along the reduced txp */
1745 ba_info->status.status_driver_data[0] =
1746 RS_DRV_DATA_PACK(tid_data->lq_color,
1747 ba_info->status.status_driver_data[0]);
1748 ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1749
1750 skb_queue_walk(&reclaimed_skbs, skb) {
1751 struct ieee80211_hdr *hdr = (void *)skb->data;
1752 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1753
1754 if (ieee80211_is_data_qos(hdr->frame_control))
1755 freed++;
1756 else
1757 WARN_ON_ONCE(1);
1758
1759 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1760
1761 memset(&info->status, 0, sizeof(info->status));
1762 /* Packet was transmitted successfully, failures come as single
1763 * frames because before failing a frame the firmware transmits
1764 * it without aggregation at least once.
1765 */
1766 info->flags |= IEEE80211_TX_STAT_ACK;
1767
1768 /* this is the first skb we deliver in this batch */
1769 /* put the rate scaling data there */
1770 if (freed == 1) {
1771 info->flags |= IEEE80211_TX_STAT_AMPDU;
1772 memcpy(&info->status, &ba_info->status,
1773 sizeof(ba_info->status));
1774 iwl_mvm_hwrate_to_tx_status(rate, info);
1775 }
1776 }
1777
1778 spin_unlock_bh(&mvmsta->lock);
1779
1780 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1781 * possible (i.e. first MPDU in the aggregation wasn't acked)
1782 * Still it's important to update RS about sent vs. acked.
1783 */
1784 if (skb_queue_empty(&reclaimed_skbs)) {
1785 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1786
1787 if (mvmsta->vif)
1788 chanctx_conf =
1789 rcu_dereference(mvmsta->vif->chanctx_conf);
1790
1791 if (WARN_ON_ONCE(!chanctx_conf))
1792 goto out;
1793
1794 ba_info->band = chanctx_conf->def.chan->band;
1795 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1796
1797 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1798 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1799 }
1800
1801 out:
1802 rcu_read_unlock();
1803
1804 while (!skb_queue_empty(&reclaimed_skbs)) {
1805 skb = __skb_dequeue(&reclaimed_skbs);
1806 ieee80211_tx_status(mvm->hw, skb);
1807 }
1808 }
1809
1810 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1811 {
1812 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1813 int sta_id, tid, txq, index;
1814 struct ieee80211_tx_info ba_info = {};
1815 struct iwl_mvm_ba_notif *ba_notif;
1816 struct iwl_mvm_tid_data *tid_data;
1817 struct iwl_mvm_sta *mvmsta;
1818
1819 if (iwl_mvm_has_new_tx_api(mvm)) {
1820 struct iwl_mvm_compressed_ba_notif *ba_res =
1821 (void *)pkt->data;
1822 int i;
1823
1824 sta_id = ba_res->sta_id;
1825 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1826 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1827 ba_info.status.tx_time =
1828 (u16)le32_to_cpu(ba_res->wireless_time);
1829 ba_info.status.status_driver_data[0] =
1830 (void *)(uintptr_t)ba_res->reduced_txp;
1831
1832 if (!le16_to_cpu(ba_res->tfd_cnt))
1833 goto out;
1834
1835 /* Free per TID */
1836 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) {
1837 struct iwl_mvm_compressed_ba_tfd *ba_tfd =
1838 &ba_res->tfd[i];
1839
1840 iwl_mvm_tx_reclaim(mvm, sta_id, ba_tfd->tid,
1841 (int)(le16_to_cpu(ba_tfd->q_num)),
1842 le16_to_cpu(ba_tfd->tfd_index),
1843 &ba_info,
1844 le32_to_cpu(ba_res->tx_rate));
1845 }
1846
1847 out:
1848 IWL_DEBUG_TX_REPLY(mvm,
1849 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1850 sta_id, le32_to_cpu(ba_res->flags),
1851 le16_to_cpu(ba_res->txed),
1852 le16_to_cpu(ba_res->done));
1853 return;
1854 }
1855
1856 ba_notif = (void *)pkt->data;
1857 sta_id = ba_notif->sta_id;
1858 tid = ba_notif->tid;
1859 /* "flow" corresponds to Tx queue */
1860 txq = le16_to_cpu(ba_notif->scd_flow);
1861 /* "ssn" is start of block-ack Tx window, corresponds to index
1862 * (in Tx queue's circular buffer) of first TFD/frame in window */
1863 index = le16_to_cpu(ba_notif->scd_ssn);
1864
1865 rcu_read_lock();
1866 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1867 if (WARN_ON_ONCE(!mvmsta)) {
1868 rcu_read_unlock();
1869 return;
1870 }
1871
1872 tid_data = &mvmsta->tid_data[tid];
1873
1874 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1875 ba_info.status.ampdu_len = ba_notif->txed;
1876 ba_info.status.tx_time = tid_data->tx_time;
1877 ba_info.status.status_driver_data[0] =
1878 (void *)(uintptr_t)ba_notif->reduced_txp;
1879
1880 rcu_read_unlock();
1881
1882 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1883 tid_data->rate_n_flags);
1884
1885 IWL_DEBUG_TX_REPLY(mvm,
1886 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1887 ba_notif->sta_addr, ba_notif->sta_id);
1888
1889 IWL_DEBUG_TX_REPLY(mvm,
1890 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1891 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1892 le64_to_cpu(ba_notif->bitmap), txq, index,
1893 ba_notif->txed, ba_notif->txed_2_done);
1894
1895 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1896 ba_notif->reduced_txp);
1897 }
1898
1899 /*
1900 * Note that there are transports that buffer frames before they reach
1901 * the firmware. This means that after flush_tx_path is called, the
1902 * queue might not be empty. The race-free way to handle this is to:
1903 * 1) set the station as draining
1904 * 2) flush the Tx path
1905 * 3) wait for the transport queues to be empty
1906 */
1907 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1908 {
1909 int ret;
1910 struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
1911 .queues_ctl = cpu_to_le32(tfd_msk),
1912 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1913 };
1914
1915 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
1916
1917 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1918 sizeof(flush_cmd), &flush_cmd);
1919 if (ret)
1920 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1921 return ret;
1922 }
1923
1924 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id,
1925 u16 tids, u32 flags)
1926 {
1927 int ret;
1928 struct iwl_tx_path_flush_cmd flush_cmd = {
1929 .sta_id = cpu_to_le32(sta_id),
1930 .tid_mask = cpu_to_le16(tids),
1931 };
1932
1933 WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
1934
1935 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1936 sizeof(flush_cmd), &flush_cmd);
1937 if (ret)
1938 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1939 return ret;
1940 }
1941
1942 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags)
1943 {
1944 struct iwl_mvm_int_sta *int_sta = sta;
1945 struct iwl_mvm_sta *mvm_sta = sta;
1946
1947 if (iwl_mvm_has_new_tx_api(mvm)) {
1948 if (internal)
1949 return iwl_mvm_flush_sta_tids(mvm, int_sta->sta_id,
1950 BIT(IWL_MGMT_TID), flags);
1951
1952 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id,
1953 0xFF, flags);
1954 }
1955
1956 if (internal)
1957 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk,
1958 flags);
1959
1960 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags);
1961 }
ubuntu-bionic-kernel mirror