Merge remote-tracking branches 'asoc/fix/compress', 'asoc/fix/core', 'asoc/fix/dapm...
[sfrench/cifs-2.6.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
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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.
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16  * This program is distributed in the hope that it will be useful, but
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30  *  Intel Linux Wireless <linuxwifi@intel.com>
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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
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41  * modification, are permitted provided that the following conditions
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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
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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
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->fwrt, NULL, trig))
92                 return;
93
94         if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
95                 return;
96
97         iwl_fw_dbg_collect_trig(&mvm->fwrt, 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                            u16 offload_assist)
109 {
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         /*
188          * mac header len should include IV, size is in words unless
189          * the IV is added by the firmware like in WEP.
190          * In new Tx API, the IV is always added by the firmware.
191          */
192         if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
193             info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
194             info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104)
195                 mh_len += info->control.hw_key->iv_len;
196         mh_len /= 2;
197         offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
198
199 out:
200 #endif
201         return offload_assist;
202 }
203
204 /*
205  * Sets most of the Tx cmd's fields
206  */
207 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
208                         struct iwl_tx_cmd *tx_cmd,
209                         struct ieee80211_tx_info *info, u8 sta_id)
210 {
211         struct ieee80211_hdr *hdr = (void *)skb->data;
212         __le16 fc = hdr->frame_control;
213         u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
214         u32 len = skb->len + FCS_LEN;
215         u16 offload_assist = 0;
216         u8 ac;
217
218         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
219                 tx_flags |= TX_CMD_FLG_ACK;
220         else
221                 tx_flags &= ~TX_CMD_FLG_ACK;
222
223         if (ieee80211_is_probe_resp(fc))
224                 tx_flags |= TX_CMD_FLG_TSF;
225
226         if (ieee80211_has_morefrags(fc))
227                 tx_flags |= TX_CMD_FLG_MORE_FRAG;
228
229         if (ieee80211_is_data_qos(fc)) {
230                 u8 *qc = ieee80211_get_qos_ctl(hdr);
231                 tx_cmd->tid_tspec = qc[0] & 0xf;
232                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
233                 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
234                         offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
235         } else if (ieee80211_is_back_req(fc)) {
236                 struct ieee80211_bar *bar = (void *)skb->data;
237                 u16 control = le16_to_cpu(bar->control);
238                 u16 ssn = le16_to_cpu(bar->start_seq_num);
239
240                 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
241                 tx_cmd->tid_tspec = (control &
242                                      IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
243                         IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
244                 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
245                 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
246                                           ssn);
247         } else {
248                 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
249                 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
250                         tx_flags |= TX_CMD_FLG_SEQ_CTL;
251                 else
252                         tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
253         }
254
255         /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
256         if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
257                 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
258         else
259                 ac = tid_to_mac80211_ac[0];
260
261         tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
262                         TX_CMD_FLG_BT_PRIO_POS;
263
264         if (ieee80211_is_mgmt(fc)) {
265                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
266                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
267                 else if (ieee80211_is_action(fc))
268                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
269                 else
270                         tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
271
272                 /* The spec allows Action frames in A-MPDU, we don't support
273                  * it
274                  */
275                 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
276         } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
277                 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
278         } else {
279                 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
280         }
281
282         if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
283             !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
284                 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
285
286         if (fw_has_capa(&mvm->fw->ucode_capa,
287                         IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
288             ieee80211_action_contains_tpc(skb))
289                 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
290
291         tx_cmd->tx_flags = cpu_to_le32(tx_flags);
292         /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
293         tx_cmd->len = cpu_to_le16((u16)skb->len);
294         tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
295         tx_cmd->sta_id = sta_id;
296
297         /* padding is inserted later in transport */
298         if (ieee80211_hdrlen(fc) % 4 &&
299             !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
300                 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
301
302         tx_cmd->offload_assist |=
303                 cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info,
304                                             offload_assist));
305 }
306
307 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
308                                struct ieee80211_tx_info *info,
309                                struct ieee80211_sta *sta)
310 {
311         int rate_idx;
312         u8 rate_plcp;
313         u32 rate_flags;
314
315         /* HT rate doesn't make sense for a non data frame */
316         WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
317                   "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n",
318                   info->control.rates[0].flags,
319                   info->control.rates[0].idx);
320
321         rate_idx = info->control.rates[0].idx;
322         /* if the rate isn't a well known legacy rate, take the lowest one */
323         if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
324                 rate_idx = rate_lowest_index(
325                                 &mvm->nvm_data->bands[info->band], sta);
326
327         /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
328         if (info->band == NL80211_BAND_5GHZ)
329                 rate_idx += IWL_FIRST_OFDM_RATE;
330
331         /* For 2.4 GHZ band, check that there is no need to remap */
332         BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
333
334         /* Get PLCP rate for tx_cmd->rate_n_flags */
335         rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
336
337         if (info->band == NL80211_BAND_2GHZ &&
338             !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
339                 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
340         else
341                 rate_flags =
342                         BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
343
344         /* Set CCK flag as needed */
345         if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
346                 rate_flags |= RATE_MCS_CCK_MSK;
347
348         return (u32)rate_plcp | rate_flags;
349 }
350
351 /*
352  * Sets the fields in the Tx cmd that are rate related
353  */
354 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
355                             struct ieee80211_tx_info *info,
356                             struct ieee80211_sta *sta, __le16 fc)
357 {
358         /* Set retry limit on RTS packets */
359         tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
360
361         /* Set retry limit on DATA packets and Probe Responses*/
362         if (ieee80211_is_probe_resp(fc)) {
363                 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
364                 tx_cmd->rts_retry_limit =
365                         min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
366         } else if (ieee80211_is_back_req(fc)) {
367                 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
368         } else {
369                 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
370         }
371
372         /*
373          * for data packets, rate info comes from the table inside the fw. This
374          * table is controlled by LINK_QUALITY commands
375          */
376
377         if (ieee80211_is_data(fc) && sta) {
378                 tx_cmd->initial_rate_index = 0;
379                 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
380                 return;
381         } else if (ieee80211_is_back_req(fc)) {
382                 tx_cmd->tx_flags |=
383                         cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
384         }
385
386         mvm->mgmt_last_antenna_idx =
387                 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
388                                      mvm->mgmt_last_antenna_idx);
389
390         /* Set the rate in the TX cmd */
391         tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta));
392 }
393
394 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
395                                          u8 *crypto_hdr)
396 {
397         struct ieee80211_key_conf *keyconf = info->control.hw_key;
398         u64 pn;
399
400         pn = atomic64_inc_return(&keyconf->tx_pn);
401         crypto_hdr[0] = pn;
402         crypto_hdr[2] = 0;
403         crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
404         crypto_hdr[1] = pn >> 8;
405         crypto_hdr[4] = pn >> 16;
406         crypto_hdr[5] = pn >> 24;
407         crypto_hdr[6] = pn >> 32;
408         crypto_hdr[7] = pn >> 40;
409 }
410
411 /*
412  * Sets the fields in the Tx cmd that are crypto related
413  */
414 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
415                                       struct ieee80211_tx_info *info,
416                                       struct iwl_tx_cmd *tx_cmd,
417                                       struct sk_buff *skb_frag,
418                                       int hdrlen)
419 {
420         struct ieee80211_key_conf *keyconf = info->control.hw_key;
421         u8 *crypto_hdr = skb_frag->data + hdrlen;
422         u64 pn;
423
424         switch (keyconf->cipher) {
425         case WLAN_CIPHER_SUITE_CCMP:
426         case WLAN_CIPHER_SUITE_CCMP_256:
427                 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
428                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
429                 break;
430
431         case WLAN_CIPHER_SUITE_TKIP:
432                 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
433                 pn = atomic64_inc_return(&keyconf->tx_pn);
434                 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
435                 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
436                 break;
437
438         case WLAN_CIPHER_SUITE_WEP104:
439                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
440                 /* fall through */
441         case WLAN_CIPHER_SUITE_WEP40:
442                 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
443                         ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
444                           TX_CMD_SEC_WEP_KEY_IDX_MSK);
445
446                 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
447                 break;
448         case WLAN_CIPHER_SUITE_GCMP:
449         case WLAN_CIPHER_SUITE_GCMP_256:
450                 /* TODO: Taking the key from the table might introduce a race
451                  * when PTK rekeying is done, having an old packets with a PN
452                  * based on the old key but the message encrypted with a new
453                  * one.
454                  * Need to handle this.
455                  */
456                 tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TX_CMD_SEC_KEY_FROM_TABLE;
457                 tx_cmd->key[0] = keyconf->hw_key_idx;
458                 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
459                 break;
460         default:
461                 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
462         }
463 }
464
465 /*
466  * Allocates and sets the Tx cmd the driver data pointers in the skb
467  */
468 static struct iwl_device_cmd *
469 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
470                       struct ieee80211_tx_info *info, int hdrlen,
471                       struct ieee80211_sta *sta, u8 sta_id)
472 {
473         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
474         struct iwl_device_cmd *dev_cmd;
475         struct iwl_tx_cmd *tx_cmd;
476
477         dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
478
479         if (unlikely(!dev_cmd))
480                 return NULL;
481
482         /* Make sure we zero enough of dev_cmd */
483         BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd));
484
485         memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd));
486         dev_cmd->hdr.cmd = TX_CMD;
487
488         if (iwl_mvm_has_new_tx_api(mvm)) {
489                 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
490                 u16 offload_assist = 0;
491
492                 if (ieee80211_is_data_qos(hdr->frame_control)) {
493                         u8 *qc = ieee80211_get_qos_ctl(hdr);
494
495                         if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
496                                 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
497                 }
498
499                 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info,
500                                                  offload_assist);
501
502                 /* padding is inserted later in transport */
503                 if (ieee80211_hdrlen(hdr->frame_control) % 4 &&
504                     !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
505                         offload_assist |= BIT(TX_CMD_OFFLD_PAD);
506
507                 cmd->offload_assist |= cpu_to_le16(offload_assist);
508
509                 /* Total # bytes to be transmitted */
510                 cmd->len = cpu_to_le16((u16)skb->len);
511
512                 /* Copy MAC header from skb into command buffer */
513                 memcpy(cmd->hdr, hdr, hdrlen);
514
515                 if (!info->control.hw_key)
516                         cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_ENCRYPT_DIS);
517
518                 /* For data packets rate info comes from the fw */
519                 if (ieee80211_is_data(hdr->frame_control) && sta)
520                         goto out;
521
522                 cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_CMD_RATE);
523                 cmd->rate_n_flags =
524                         cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta));
525
526                 goto out;
527         }
528
529         tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
530
531         if (info->control.hw_key)
532                 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
533
534         iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
535
536         iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
537
538         /* Copy MAC header from skb into command buffer */
539         memcpy(tx_cmd->hdr, hdr, hdrlen);
540
541 out:
542         return dev_cmd;
543 }
544
545 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
546                                        struct iwl_device_cmd *cmd)
547 {
548         struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
549
550         memset(&skb_info->status, 0, sizeof(skb_info->status));
551         memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
552
553         skb_info->driver_data[1] = cmd;
554 }
555
556 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
557                                       struct ieee80211_tx_info *info, __le16 fc)
558 {
559         struct iwl_mvm_vif *mvmvif;
560
561         mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif);
562
563         switch (info->control.vif->type) {
564         case NL80211_IFTYPE_AP:
565         case NL80211_IFTYPE_ADHOC:
566                 /*
567                  * Non-bufferable frames use the broadcast station, thus they
568                  * use the probe queue.
569                  * Also take care of the case where we send a deauth to a
570                  * station that we don't have, or similarly an association
571                  * response (with non-success status) for a station we can't
572                  * accept.
573                  * Also, disassociate frames might happen, particular with
574                  * reason 7 ("Class 3 frame received from nonassociated STA").
575                  */
576                 if (ieee80211_is_mgmt(fc) &&
577                     (!ieee80211_is_bufferable_mmpdu(fc) ||
578                      ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
579                         return mvm->probe_queue;
580                 if (info->hw_queue == info->control.vif->cab_queue)
581                         return mvmvif->cab_queue;
582
583                 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
584                           "fc=0x%02x", le16_to_cpu(fc));
585                 return mvm->probe_queue;
586         case NL80211_IFTYPE_P2P_DEVICE:
587                 if (ieee80211_is_mgmt(fc))
588                         return mvm->p2p_dev_queue;
589                 if (info->hw_queue == info->control.vif->cab_queue)
590                         return mvmvif->cab_queue;
591
592                 WARN_ON_ONCE(1);
593                 return mvm->p2p_dev_queue;
594         default:
595                 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
596                 return -1;
597         }
598 }
599
600 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
601 {
602         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
603         struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
604         struct ieee80211_tx_info info;
605         struct iwl_device_cmd *dev_cmd;
606         u8 sta_id;
607         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
608         int queue;
609
610         /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
611          * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
612          * queue. STATION (HS2.0) uses the auxiliary context of the FW,
613          * and hence needs to be sent on the aux queue
614          */
615         if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
616             skb_info->control.vif->type == NL80211_IFTYPE_STATION)
617                 skb_info->hw_queue = mvm->aux_queue;
618
619         memcpy(&info, skb->cb, sizeof(info));
620
621         if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
622                 return -1;
623
624         if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
625                          (!info.control.vif ||
626                           info.hw_queue != info.control.vif->cab_queue)))
627                 return -1;
628
629         queue = info.hw_queue;
630
631         /*
632          * If the interface on which the frame is sent is the P2P_DEVICE
633          * or an AP/GO interface use the broadcast station associated
634          * with it; otherwise if the interface is a managed interface
635          * use the AP station associated with it for multicast traffic
636          * (this is not possible for unicast packets as a TLDS discovery
637          * response are sent without a station entry); otherwise use the
638          * AUX station.
639          */
640         sta_id = mvm->aux_sta.sta_id;
641         if (info.control.vif) {
642                 struct iwl_mvm_vif *mvmvif =
643                         iwl_mvm_vif_from_mac80211(info.control.vif);
644
645                 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
646                     info.control.vif->type == NL80211_IFTYPE_AP ||
647                     info.control.vif->type == NL80211_IFTYPE_ADHOC) {
648                         sta_id = mvmvif->bcast_sta.sta_id;
649                         queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info,
650                                                            hdr->frame_control);
651                         if (queue < 0)
652                                 return -1;
653                 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
654                            is_multicast_ether_addr(hdr->addr1)) {
655                         u8 ap_sta_id = READ_ONCE(mvmvif->ap_sta_id);
656
657                         if (ap_sta_id != IWL_MVM_INVALID_STA)
658                                 sta_id = ap_sta_id;
659                 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
660                         queue = mvm->snif_queue;
661                         sta_id = mvm->snif_sta.sta_id;
662                 }
663         }
664
665         IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
666
667         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
668         if (!dev_cmd)
669                 return -1;
670
671         /* From now on, we cannot access info->control */
672         iwl_mvm_skb_prepare_status(skb, dev_cmd);
673
674         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
675                 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
676                 return -1;
677         }
678
679         return 0;
680 }
681
682 #ifdef CONFIG_INET
683 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
684                           struct ieee80211_tx_info *info,
685                           struct ieee80211_sta *sta,
686                           struct sk_buff_head *mpdus_skb)
687 {
688         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
689         struct ieee80211_hdr *hdr = (void *)skb->data;
690         unsigned int mss = skb_shinfo(skb)->gso_size;
691         struct sk_buff *tmp, *next;
692         char cb[sizeof(skb->cb)];
693         unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
694         bool ipv4 = (skb->protocol == htons(ETH_P_IP));
695         u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
696         u16 snap_ip_tcp, pad, i = 0;
697         unsigned int dbg_max_amsdu_len;
698         netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG;
699         u8 *qc, tid, txf;
700
701         snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
702                 tcp_hdrlen(skb);
703
704         dbg_max_amsdu_len = READ_ONCE(mvm->max_amsdu_len);
705
706         if (!sta->max_amsdu_len ||
707             !ieee80211_is_data_qos(hdr->frame_control) ||
708             (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) {
709                 num_subframes = 1;
710                 pad = 0;
711                 goto segment;
712         }
713
714         qc = ieee80211_get_qos_ctl(hdr);
715         tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
716         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
717                 return -EINVAL;
718
719         /*
720          * Do not build AMSDU for IPv6 with extension headers.
721          * ask stack to segment and checkum the generated MPDUs for us.
722          */
723         if (skb->protocol == htons(ETH_P_IPV6) &&
724             ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
725             IPPROTO_TCP) {
726                 num_subframes = 1;
727                 pad = 0;
728                 netdev_features &= ~NETIF_F_CSUM_MASK;
729                 goto segment;
730         }
731
732         /*
733          * No need to lock amsdu_in_ampdu_allowed since it can't be modified
734          * during an BA session.
735          */
736         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
737             !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) {
738                 num_subframes = 1;
739                 pad = 0;
740                 goto segment;
741         }
742
743         max_amsdu_len = sta->max_amsdu_len;
744
745         /* the Tx FIFO to which this A-MSDU will be routed */
746         txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, tid_to_mac80211_ac[tid]);
747
748         /*
749          * Don't send an AMSDU that will be longer than the TXF.
750          * Add a security margin of 256 for the TX command + headers.
751          * We also want to have the start of the next packet inside the
752          * fifo to be able to send bursts.
753          */
754         max_amsdu_len = min_t(unsigned int, max_amsdu_len,
755                               mvm->fwrt.smem_cfg.lmac[0].txfifo_size[txf] -
756                               256);
757
758         if (unlikely(dbg_max_amsdu_len))
759                 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
760                                       dbg_max_amsdu_len);
761
762         /*
763          * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
764          * supported. This is a spec requirement (IEEE 802.11-2015
765          * section 8.7.3 NOTE 3).
766          */
767         if (info->flags & IEEE80211_TX_CTL_AMPDU &&
768             !sta->vht_cap.vht_supported)
769                 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
770
771         /* Sub frame header + SNAP + IP header + TCP header + MSS */
772         subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
773         pad = (4 - subf_len) & 0x3;
774
775         /*
776          * If we have N subframes in the A-MSDU, then the A-MSDU's size is
777          * N * subf_len + (N - 1) * pad.
778          */
779         num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
780         if (num_subframes > 1)
781                 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
782
783         tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
784                 tcp_hdrlen(skb) + skb->data_len;
785
786         /*
787          * Make sure we have enough TBs for the A-MSDU:
788          *      2 for each subframe
789          *      1 more for each fragment
790          *      1 more for the potential data in the header
791          */
792         num_subframes =
793                 min_t(unsigned int, num_subframes,
794                       (mvm->trans->max_skb_frags - 1 -
795                        skb_shinfo(skb)->nr_frags) / 2);
796
797         /* This skb fits in one single A-MSDU */
798         if (num_subframes * mss >= tcp_payload_len) {
799                 __skb_queue_tail(mpdus_skb, skb);
800                 return 0;
801         }
802
803         /*
804          * Trick the segmentation function to make it
805          * create SKBs that can fit into one A-MSDU.
806          */
807 segment:
808         skb_shinfo(skb)->gso_size = num_subframes * mss;
809         memcpy(cb, skb->cb, sizeof(cb));
810
811         next = skb_gso_segment(skb, netdev_features);
812         skb_shinfo(skb)->gso_size = mss;
813         if (WARN_ON_ONCE(IS_ERR(next)))
814                 return -EINVAL;
815         else if (next)
816                 consume_skb(skb);
817
818         while (next) {
819                 tmp = next;
820                 next = tmp->next;
821
822                 memcpy(tmp->cb, cb, sizeof(tmp->cb));
823                 /*
824                  * Compute the length of all the data added for the A-MSDU.
825                  * This will be used to compute the length to write in the TX
826                  * command. We have: SNAP + IP + TCP for n -1 subframes and
827                  * ETH header for n subframes.
828                  */
829                 tcp_payload_len = skb_tail_pointer(tmp) -
830                         skb_transport_header(tmp) -
831                         tcp_hdrlen(tmp) + tmp->data_len;
832
833                 if (ipv4)
834                         ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
835
836                 if (tcp_payload_len > mss) {
837                         skb_shinfo(tmp)->gso_size = mss;
838                 } else {
839                         if (ieee80211_is_data_qos(hdr->frame_control)) {
840                                 qc = ieee80211_get_qos_ctl((void *)tmp->data);
841
842                                 if (ipv4)
843                                         ip_send_check(ip_hdr(tmp));
844                                 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
845                         }
846                         skb_shinfo(tmp)->gso_size = 0;
847                 }
848
849                 tmp->prev = NULL;
850                 tmp->next = NULL;
851
852                 __skb_queue_tail(mpdus_skb, tmp);
853                 i++;
854         }
855
856         return 0;
857 }
858 #else /* CONFIG_INET */
859 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
860                           struct ieee80211_tx_info *info,
861                           struct ieee80211_sta *sta,
862                           struct sk_buff_head *mpdus_skb)
863 {
864         /* Impossible to get TSO with CONFIG_INET */
865         WARN_ON(1);
866
867         return -1;
868 }
869 #endif
870
871 static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
872                                   struct iwl_mvm_sta *mvm_sta, u8 tid,
873                                   struct sk_buff *skb)
874 {
875         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
876         u8 mac_queue = info->hw_queue;
877         struct sk_buff_head *deferred_tx_frames;
878
879         lockdep_assert_held(&mvm_sta->lock);
880
881         mvm_sta->deferred_traffic_tid_map |= BIT(tid);
882         set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);
883
884         deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;
885
886         skb_queue_tail(deferred_tx_frames, skb);
887
888         /*
889          * The first deferred frame should've stopped the MAC queues, so we
890          * should never get a second deferred frame for the RA/TID.
891          */
892         if (!WARN(skb_queue_len(deferred_tx_frames) != 1,
893                   "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid,
894                   skb_queue_len(deferred_tx_frames))) {
895                 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
896                 schedule_work(&mvm->add_stream_wk);
897         }
898 }
899
900 /* Check if there are any timed-out TIDs on a given shared TXQ */
901 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
902 {
903         unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
904         unsigned long now = jiffies;
905         int tid;
906
907         if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
908                 return false;
909
910         for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
911                 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
912                                 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
913                         return true;
914         }
915
916         return false;
917 }
918
919 /*
920  * Sets the fields in the Tx cmd that are crypto related
921  */
922 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
923                            struct ieee80211_tx_info *info,
924                            struct ieee80211_sta *sta)
925 {
926         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
927         struct iwl_mvm_sta *mvmsta;
928         struct iwl_device_cmd *dev_cmd;
929         __le16 fc;
930         u16 seq_number = 0;
931         u8 tid = IWL_MAX_TID_COUNT;
932         u16 txq_id = info->hw_queue;
933         bool is_ampdu = false;
934         int hdrlen;
935
936         mvmsta = iwl_mvm_sta_from_mac80211(sta);
937         fc = hdr->frame_control;
938         hdrlen = ieee80211_hdrlen(fc);
939
940         if (WARN_ON_ONCE(!mvmsta))
941                 return -1;
942
943         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
944                 return -1;
945
946         dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
947                                         sta, mvmsta->sta_id);
948         if (!dev_cmd)
949                 goto drop;
950
951         /*
952          * we handle that entirely ourselves -- for uAPSD the firmware
953          * will always send a notification, and for PS-Poll responses
954          * we'll notify mac80211 when getting frame status
955          */
956         info->flags &= ~IEEE80211_TX_STATUS_EOSP;
957
958         spin_lock(&mvmsta->lock);
959
960         /* nullfunc frames should go to the MGMT queue regardless of QOS,
961          * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
962          * assignment of MGMT TID
963          */
964         if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
965                 u8 *qc = NULL;
966                 qc = ieee80211_get_qos_ctl(hdr);
967                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
968                 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
969                         goto drop_unlock_sta;
970
971                 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
972                 if (WARN_ON_ONCE(is_ampdu &&
973                                  mvmsta->tid_data[tid].state != IWL_AGG_ON))
974                         goto drop_unlock_sta;
975
976                 seq_number = mvmsta->tid_data[tid].seq_number;
977                 seq_number &= IEEE80211_SCTL_SEQ;
978
979                 if (!iwl_mvm_has_new_tx_api(mvm)) {
980                         struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
981
982                         hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
983                         hdr->seq_ctrl |= cpu_to_le16(seq_number);
984                         /* update the tx_cmd hdr as it was already copied */
985                         tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
986                 }
987         }
988
989         txq_id = mvmsta->tid_data[tid].txq_id;
990
991         WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
992
993         /* Check if TXQ needs to be allocated or re-activated */
994         if (unlikely(txq_id == IWL_MVM_INVALID_QUEUE ||
995                      !mvmsta->tid_data[tid].is_tid_active)) {
996                 /* If TXQ needs to be allocated... */
997                 if (txq_id == IWL_MVM_INVALID_QUEUE) {
998                         iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);
999
1000                         /*
1001                          * The frame is now deferred, and the worker scheduled
1002                          * will re-allocate it, so we can free it for now.
1003                          */
1004                         iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1005                         spin_unlock(&mvmsta->lock);
1006                         return 0;
1007                 }
1008
1009                 /* queue should always be active in new TX path */
1010                 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
1011
1012                 /* If we are here - TXQ exists and needs to be re-activated */
1013                 spin_lock(&mvm->queue_info_lock);
1014                 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1015                 mvmsta->tid_data[tid].is_tid_active = true;
1016                 spin_unlock(&mvm->queue_info_lock);
1017
1018                 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n",
1019                                     txq_id);
1020         }
1021
1022         if (!iwl_mvm_has_new_tx_api(mvm)) {
1023                 /* Keep track of the time of the last frame for this RA/TID */
1024                 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1025
1026                 /*
1027                  * If we have timed-out TIDs - schedule the worker that will
1028                  * reconfig the queues and update them
1029                  *
1030                  * Note that the mvm->queue_info_lock isn't being taken here in
1031                  * order to not serialize the TX flow. This isn't dangerous
1032                  * because scheduling mvm->add_stream_wk can't ruin the state,
1033                  * and if we DON'T schedule it due to some race condition then
1034                  * next TX we get here we will.
1035                  */
1036                 if (unlikely(mvm->queue_info[txq_id].status ==
1037                              IWL_MVM_QUEUE_SHARED &&
1038                              iwl_mvm_txq_should_update(mvm, txq_id)))
1039                         schedule_work(&mvm->add_stream_wk);
1040         }
1041
1042         IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
1043                      tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
1044
1045         /* From now on, we cannot access info->control */
1046         iwl_mvm_skb_prepare_status(skb, dev_cmd);
1047
1048         if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1049                 goto drop_unlock_sta;
1050
1051         if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1052                 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1053
1054         spin_unlock(&mvmsta->lock);
1055
1056         return 0;
1057
1058 drop_unlock_sta:
1059         iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1060         spin_unlock(&mvmsta->lock);
1061 drop:
1062         return -1;
1063 }
1064
1065 int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
1066                    struct ieee80211_sta *sta)
1067 {
1068         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1069         struct ieee80211_tx_info info;
1070         struct sk_buff_head mpdus_skbs;
1071         unsigned int payload_len;
1072         int ret;
1073
1074         if (WARN_ON_ONCE(!mvmsta))
1075                 return -1;
1076
1077         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1078                 return -1;
1079
1080         memcpy(&info, skb->cb, sizeof(info));
1081
1082         if (!skb_is_gso(skb))
1083                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1084
1085         payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1086                 tcp_hdrlen(skb) + skb->data_len;
1087
1088         if (payload_len <= skb_shinfo(skb)->gso_size)
1089                 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1090
1091         __skb_queue_head_init(&mpdus_skbs);
1092
1093         ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1094         if (ret)
1095                 return ret;
1096
1097         if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1098                 return ret;
1099
1100         while (!skb_queue_empty(&mpdus_skbs)) {
1101                 skb = __skb_dequeue(&mpdus_skbs);
1102
1103                 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1104                 if (ret) {
1105                         __skb_queue_purge(&mpdus_skbs);
1106                         return ret;
1107                 }
1108         }
1109
1110         return 0;
1111 }
1112
1113 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1114                                       struct ieee80211_sta *sta, u8 tid)
1115 {
1116         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1117         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1118         struct ieee80211_vif *vif = mvmsta->vif;
1119         u16 normalized_ssn;
1120
1121         lockdep_assert_held(&mvmsta->lock);
1122
1123         if ((tid_data->state == IWL_AGG_ON ||
1124              tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1125             iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1126                 /*
1127                  * Now that this aggregation or DQA queue is empty tell
1128                  * mac80211 so it knows we no longer have frames buffered for
1129                  * the station on this TID (for the TIM bitmap calculation.)
1130                  */
1131                 ieee80211_sta_set_buffered(sta, tid, false);
1132         }
1133
1134         /*
1135          * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
1136          * to align the wrap around of ssn so we compare relevant values.
1137          */
1138         normalized_ssn = tid_data->ssn;
1139         if (mvm->trans->cfg->gen2)
1140                 normalized_ssn &= 0xff;
1141
1142         if (normalized_ssn != tid_data->next_reclaimed)
1143                 return;
1144
1145         switch (tid_data->state) {
1146         case IWL_EMPTYING_HW_QUEUE_ADDBA:
1147                 IWL_DEBUG_TX_QUEUES(mvm,
1148                                     "Can continue addBA flow ssn = next_recl = %d\n",
1149                                     tid_data->next_reclaimed);
1150                 tid_data->state = IWL_AGG_STARTING;
1151                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1152                 break;
1153
1154         case IWL_EMPTYING_HW_QUEUE_DELBA:
1155                 IWL_DEBUG_TX_QUEUES(mvm,
1156                                     "Can continue DELBA flow ssn = next_recl = %d\n",
1157                                     tid_data->next_reclaimed);
1158                 tid_data->state = IWL_AGG_OFF;
1159                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1160                 break;
1161
1162         default:
1163                 break;
1164         }
1165 }
1166
1167 #ifdef CONFIG_IWLWIFI_DEBUG
1168 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1169 {
1170 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1171 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1172
1173         switch (status & TX_STATUS_MSK) {
1174         case TX_STATUS_SUCCESS:
1175                 return "SUCCESS";
1176         TX_STATUS_POSTPONE(DELAY);
1177         TX_STATUS_POSTPONE(FEW_BYTES);
1178         TX_STATUS_POSTPONE(BT_PRIO);
1179         TX_STATUS_POSTPONE(QUIET_PERIOD);
1180         TX_STATUS_POSTPONE(CALC_TTAK);
1181         TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1182         TX_STATUS_FAIL(SHORT_LIMIT);
1183         TX_STATUS_FAIL(LONG_LIMIT);
1184         TX_STATUS_FAIL(UNDERRUN);
1185         TX_STATUS_FAIL(DRAIN_FLOW);
1186         TX_STATUS_FAIL(RFKILL_FLUSH);
1187         TX_STATUS_FAIL(LIFE_EXPIRE);
1188         TX_STATUS_FAIL(DEST_PS);
1189         TX_STATUS_FAIL(HOST_ABORTED);
1190         TX_STATUS_FAIL(BT_RETRY);
1191         TX_STATUS_FAIL(STA_INVALID);
1192         TX_STATUS_FAIL(FRAG_DROPPED);
1193         TX_STATUS_FAIL(TID_DISABLE);
1194         TX_STATUS_FAIL(FIFO_FLUSHED);
1195         TX_STATUS_FAIL(SMALL_CF_POLL);
1196         TX_STATUS_FAIL(FW_DROP);
1197         TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1198         }
1199
1200         return "UNKNOWN";
1201
1202 #undef TX_STATUS_FAIL
1203 #undef TX_STATUS_POSTPONE
1204 }
1205 #endif /* CONFIG_IWLWIFI_DEBUG */
1206
1207 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1208                                enum nl80211_band band,
1209                                struct ieee80211_tx_rate *r)
1210 {
1211         if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1212                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1213         switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1214         case RATE_MCS_CHAN_WIDTH_20:
1215                 break;
1216         case RATE_MCS_CHAN_WIDTH_40:
1217                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1218                 break;
1219         case RATE_MCS_CHAN_WIDTH_80:
1220                 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1221                 break;
1222         case RATE_MCS_CHAN_WIDTH_160:
1223                 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1224                 break;
1225         }
1226         if (rate_n_flags & RATE_MCS_SGI_MSK)
1227                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1228         if (rate_n_flags & RATE_MCS_HT_MSK) {
1229                 r->flags |= IEEE80211_TX_RC_MCS;
1230                 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1231         } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1232                 ieee80211_rate_set_vht(
1233                         r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1234                         ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1235                                                 RATE_VHT_MCS_NSS_POS) + 1);
1236                 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1237         } else {
1238                 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1239                                                              band);
1240         }
1241 }
1242
1243 /**
1244  * translate ucode response to mac80211 tx status control values
1245  */
1246 static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1247                                         struct ieee80211_tx_info *info)
1248 {
1249         struct ieee80211_tx_rate *r = &info->status.rates[0];
1250
1251         info->status.antenna =
1252                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1253         iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1254 }
1255
1256 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1257                                             u32 status)
1258 {
1259         struct iwl_fw_dbg_trigger_tlv *trig;
1260         struct iwl_fw_dbg_trigger_tx_status *status_trig;
1261         int i;
1262
1263         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
1264                 return;
1265
1266         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
1267         status_trig = (void *)trig->data;
1268
1269         if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, NULL, trig))
1270                 return;
1271
1272         for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1273                 /* don't collect on status 0 */
1274                 if (!status_trig->statuses[i].status)
1275                         break;
1276
1277                 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1278                         continue;
1279
1280                 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1281                                         "Tx status %d was received",
1282                                         status & TX_STATUS_MSK);
1283                 break;
1284         }
1285 }
1286
1287 /**
1288  * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1289  * @tx_resp: the Tx response from the fw (agg or non-agg)
1290  *
1291  * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1292  * it can't know that everything will go well until the end of the AMPDU, it
1293  * can't know in advance the number of MPDUs that will be sent in the current
1294  * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1295  * Hence, it can't know in advance what the SSN of the SCD will be at the end
1296  * of the batch. This is why the SSN of the SCD is written at the end of the
1297  * whole struct at a variable offset. This function knows how to cope with the
1298  * variable offset and returns the SSN of the SCD.
1299  */
1300 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1301                                       struct iwl_mvm_tx_resp *tx_resp)
1302 {
1303         return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1304                             tx_resp->frame_count) & 0xfff;
1305 }
1306
1307 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1308                                      struct iwl_rx_packet *pkt)
1309 {
1310         struct ieee80211_sta *sta;
1311         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1312         int txq_id = SEQ_TO_QUEUE(sequence);
1313         /* struct iwl_mvm_tx_resp_v3 is almost the same */
1314         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1315         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1316         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1317         struct agg_tx_status *agg_status =
1318                 iwl_mvm_get_agg_status(mvm, tx_resp);
1319         u32 status = le16_to_cpu(agg_status->status);
1320         u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1321         struct iwl_mvm_sta *mvmsta;
1322         struct sk_buff_head skbs;
1323         u8 skb_freed = 0;
1324         u8 lq_color;
1325         u16 next_reclaimed, seq_ctl;
1326         bool is_ndp = false;
1327
1328         __skb_queue_head_init(&skbs);
1329
1330         if (iwl_mvm_has_new_tx_api(mvm))
1331                 txq_id = le16_to_cpu(tx_resp->tx_queue);
1332
1333         seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1334
1335         /* we can free until ssn % q.n_bd not inclusive */
1336         iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1337
1338         while (!skb_queue_empty(&skbs)) {
1339                 struct sk_buff *skb = __skb_dequeue(&skbs);
1340                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1341                 bool flushed = false;
1342
1343                 skb_freed++;
1344
1345                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1346
1347                 memset(&info->status, 0, sizeof(info->status));
1348
1349                 /* inform mac80211 about what happened with the frame */
1350                 switch (status & TX_STATUS_MSK) {
1351                 case TX_STATUS_SUCCESS:
1352                 case TX_STATUS_DIRECT_DONE:
1353                         info->flags |= IEEE80211_TX_STAT_ACK;
1354                         break;
1355                 case TX_STATUS_FAIL_FIFO_FLUSHED:
1356                 case TX_STATUS_FAIL_DRAIN_FLOW:
1357                         flushed = true;
1358                         break;
1359                 case TX_STATUS_FAIL_DEST_PS:
1360                         /* the FW should have stopped the queue and not
1361                          * return this status
1362                          */
1363                         WARN_ON(1);
1364                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1365                         break;
1366                 default:
1367                         break;
1368                 }
1369
1370                 iwl_mvm_tx_status_check_trigger(mvm, status);
1371
1372                 info->status.rates[0].count = tx_resp->failure_frame + 1;
1373                 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1374                                             info);
1375                 info->status.status_driver_data[1] =
1376                         (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1377
1378                 /* Single frame failure in an AMPDU queue => send BAR */
1379                 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1380                     !(info->flags & IEEE80211_TX_STAT_ACK) &&
1381                     !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1382                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1383                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1384
1385                 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1386                 if (status != TX_STATUS_SUCCESS) {
1387                         struct ieee80211_hdr *hdr = (void *)skb->data;
1388                         seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1389                 }
1390
1391                 if (unlikely(!seq_ctl)) {
1392                         struct ieee80211_hdr *hdr = (void *)skb->data;
1393
1394                         /*
1395                          * If it is an NDP, we can't update next_reclaim since
1396                          * its sequence control is 0. Note that for that same
1397                          * reason, NDPs are never sent to A-MPDU'able queues
1398                          * so that we can never have more than one freed frame
1399                          * for a single Tx resonse (see WARN_ON below).
1400                          */
1401                         if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1402                                 is_ndp = true;
1403                 }
1404
1405                 /*
1406                  * TODO: this is not accurate if we are freeing more than one
1407                  * packet.
1408                  */
1409                 info->status.tx_time =
1410                         le16_to_cpu(tx_resp->wireless_media_time);
1411                 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1412                 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1413                 info->status.status_driver_data[0] =
1414                         RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1415
1416                 ieee80211_tx_status(mvm->hw, skb);
1417         }
1418
1419         /* This is an aggregation queue or might become one, so we use
1420          * the ssn since: ssn = wifi seq_num % 256.
1421          * The seq_ctl is the sequence control of the packet to which
1422          * this Tx response relates. But if there is a hole in the
1423          * bitmap of the BA we received, this Tx response may allow to
1424          * reclaim the hole and all the subsequent packets that were
1425          * already acked. In that case, seq_ctl != ssn, and the next
1426          * packet to be reclaimed will be ssn and not seq_ctl. In that
1427          * case, several packets will be reclaimed even if
1428          * frame_count = 1.
1429          *
1430          * The ssn is the index (% 256) of the latest packet that has
1431          * treated (acked / dropped) + 1.
1432          */
1433         next_reclaimed = ssn;
1434
1435         IWL_DEBUG_TX_REPLY(mvm,
1436                            "TXQ %d status %s (0x%08x)\n",
1437                            txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1438
1439         IWL_DEBUG_TX_REPLY(mvm,
1440                            "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1441                            le32_to_cpu(tx_resp->initial_rate),
1442                            tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1443                            ssn, next_reclaimed, seq_ctl);
1444
1445         rcu_read_lock();
1446
1447         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1448         /*
1449          * sta can't be NULL otherwise it'd mean that the sta has been freed in
1450          * the firmware while we still have packets for it in the Tx queues.
1451          */
1452         if (WARN_ON_ONCE(!sta))
1453                 goto out;
1454
1455         if (!IS_ERR(sta)) {
1456                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1457
1458                 if (tid != IWL_TID_NON_QOS && tid != IWL_MGMT_TID) {
1459                         struct iwl_mvm_tid_data *tid_data =
1460                                 &mvmsta->tid_data[tid];
1461                         bool send_eosp_ndp = false;
1462
1463                         spin_lock_bh(&mvmsta->lock);
1464
1465                         if (!is_ndp) {
1466                                 tid_data->next_reclaimed = next_reclaimed;
1467                                 IWL_DEBUG_TX_REPLY(mvm,
1468                                                    "Next reclaimed packet:%d\n",
1469                                                    next_reclaimed);
1470                         } else {
1471                                 IWL_DEBUG_TX_REPLY(mvm,
1472                                                    "NDP - don't update next_reclaimed\n");
1473                         }
1474
1475                         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1476
1477                         if (mvmsta->sleep_tx_count) {
1478                                 mvmsta->sleep_tx_count--;
1479                                 if (mvmsta->sleep_tx_count &&
1480                                     !iwl_mvm_tid_queued(mvm, tid_data)) {
1481                                         /*
1482                                          * The number of frames in the queue
1483                                          * dropped to 0 even if we sent less
1484                                          * frames than we thought we had on the
1485                                          * Tx queue.
1486                                          * This means we had holes in the BA
1487                                          * window that we just filled, ask
1488                                          * mac80211 to send EOSP since the
1489                                          * firmware won't know how to do that.
1490                                          * Send NDP and the firmware will send
1491                                          * EOSP notification that will trigger
1492                                          * a call to ieee80211_sta_eosp().
1493                                          */
1494                                         send_eosp_ndp = true;
1495                                 }
1496                         }
1497
1498                         spin_unlock_bh(&mvmsta->lock);
1499                         if (send_eosp_ndp) {
1500                                 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1501                                         IEEE80211_FRAME_RELEASE_UAPSD,
1502                                         1, tid, false, false);
1503                                 mvmsta->sleep_tx_count = 0;
1504                                 ieee80211_send_eosp_nullfunc(sta, tid);
1505                         }
1506                 }
1507
1508                 if (mvmsta->next_status_eosp) {
1509                         mvmsta->next_status_eosp = false;
1510                         ieee80211_sta_eosp(sta);
1511                 }
1512         } else {
1513                 mvmsta = NULL;
1514         }
1515
1516 out:
1517         rcu_read_unlock();
1518 }
1519
1520 #ifdef CONFIG_IWLWIFI_DEBUG
1521 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1522 static const char *iwl_get_agg_tx_status(u16 status)
1523 {
1524         switch (status & AGG_TX_STATE_STATUS_MSK) {
1525         AGG_TX_STATE_(TRANSMITTED);
1526         AGG_TX_STATE_(UNDERRUN);
1527         AGG_TX_STATE_(BT_PRIO);
1528         AGG_TX_STATE_(FEW_BYTES);
1529         AGG_TX_STATE_(ABORT);
1530         AGG_TX_STATE_(TX_ON_AIR_DROP);
1531         AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1532         AGG_TX_STATE_(LAST_SENT_BT_KILL);
1533         AGG_TX_STATE_(SCD_QUERY);
1534         AGG_TX_STATE_(TEST_BAD_CRC32);
1535         AGG_TX_STATE_(RESPONSE);
1536         AGG_TX_STATE_(DUMP_TX);
1537         AGG_TX_STATE_(DELAY_TX);
1538         }
1539
1540         return "UNKNOWN";
1541 }
1542
1543 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1544                                       struct iwl_rx_packet *pkt)
1545 {
1546         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1547         struct agg_tx_status *frame_status =
1548                 iwl_mvm_get_agg_status(mvm, tx_resp);
1549         int i;
1550
1551         for (i = 0; i < tx_resp->frame_count; i++) {
1552                 u16 fstatus = le16_to_cpu(frame_status[i].status);
1553
1554                 IWL_DEBUG_TX_REPLY(mvm,
1555                                    "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1556                                    iwl_get_agg_tx_status(fstatus),
1557                                    fstatus & AGG_TX_STATE_STATUS_MSK,
1558                                    (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1559                                         AGG_TX_STATE_TRY_CNT_POS,
1560                                    le16_to_cpu(frame_status[i].sequence));
1561         }
1562 }
1563 #else
1564 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1565                                       struct iwl_rx_packet *pkt)
1566 {}
1567 #endif /* CONFIG_IWLWIFI_DEBUG */
1568
1569 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1570                                   struct iwl_rx_packet *pkt)
1571 {
1572         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1573         int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1574         int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1575         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1576         struct iwl_mvm_sta *mvmsta;
1577         int queue = SEQ_TO_QUEUE(sequence);
1578
1579         if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1580                          (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1581                 return;
1582
1583         if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1584                 return;
1585
1586         iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1587
1588         rcu_read_lock();
1589
1590         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1591
1592         if (!WARN_ON_ONCE(!mvmsta)) {
1593                 mvmsta->tid_data[tid].rate_n_flags =
1594                         le32_to_cpu(tx_resp->initial_rate);
1595                 mvmsta->tid_data[tid].tx_time =
1596                         le16_to_cpu(tx_resp->wireless_media_time);
1597                 mvmsta->tid_data[tid].lq_color =
1598                         TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1599         }
1600
1601         rcu_read_unlock();
1602 }
1603
1604 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1605 {
1606         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1607         struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1608
1609         if (tx_resp->frame_count == 1)
1610                 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1611         else
1612                 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1613 }
1614
1615 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1616                                int txq, int index,
1617                                struct ieee80211_tx_info *ba_info, u32 rate)
1618 {
1619         struct sk_buff_head reclaimed_skbs;
1620         struct iwl_mvm_tid_data *tid_data;
1621         struct ieee80211_sta *sta;
1622         struct iwl_mvm_sta *mvmsta;
1623         struct sk_buff *skb;
1624         int freed;
1625
1626         if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1627                       tid >= IWL_MAX_TID_COUNT,
1628                       "sta_id %d tid %d", sta_id, tid))
1629                 return;
1630
1631         rcu_read_lock();
1632
1633         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1634
1635         /* Reclaiming frames for a station that has been deleted ? */
1636         if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1637                 rcu_read_unlock();
1638                 return;
1639         }
1640
1641         mvmsta = iwl_mvm_sta_from_mac80211(sta);
1642         tid_data = &mvmsta->tid_data[tid];
1643
1644         if (tid_data->txq_id != txq) {
1645                 IWL_ERR(mvm,
1646                         "invalid BA notification: Q %d, tid %d\n",
1647                         tid_data->txq_id, tid);
1648                 rcu_read_unlock();
1649                 return;
1650         }
1651
1652         spin_lock_bh(&mvmsta->lock);
1653
1654         __skb_queue_head_init(&reclaimed_skbs);
1655
1656         /*
1657          * Release all TFDs before the SSN, i.e. all TFDs in front of
1658          * block-ack window (we assume that they've been successfully
1659          * transmitted ... if not, it's too late anyway).
1660          */
1661         iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1662
1663         tid_data->next_reclaimed = index;
1664
1665         iwl_mvm_check_ratid_empty(mvm, sta, tid);
1666
1667         freed = 0;
1668
1669         /* pack lq color from tid_data along the reduced txp */
1670         ba_info->status.status_driver_data[0] =
1671                 RS_DRV_DATA_PACK(tid_data->lq_color,
1672                                  ba_info->status.status_driver_data[0]);
1673         ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1674
1675         skb_queue_walk(&reclaimed_skbs, skb) {
1676                 struct ieee80211_hdr *hdr = (void *)skb->data;
1677                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1678
1679                 if (ieee80211_is_data_qos(hdr->frame_control))
1680                         freed++;
1681                 else
1682                         WARN_ON_ONCE(1);
1683
1684                 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1685
1686                 memset(&info->status, 0, sizeof(info->status));
1687                 /* Packet was transmitted successfully, failures come as single
1688                  * frames because before failing a frame the firmware transmits
1689                  * it without aggregation at least once.
1690                  */
1691                 info->flags |= IEEE80211_TX_STAT_ACK;
1692
1693                 /* this is the first skb we deliver in this batch */
1694                 /* put the rate scaling data there */
1695                 if (freed == 1) {
1696                         info->flags |= IEEE80211_TX_STAT_AMPDU;
1697                         memcpy(&info->status, &ba_info->status,
1698                                sizeof(ba_info->status));
1699                         iwl_mvm_hwrate_to_tx_status(rate, info);
1700                 }
1701         }
1702
1703         spin_unlock_bh(&mvmsta->lock);
1704
1705         /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1706          * possible (i.e. first MPDU in the aggregation wasn't acked)
1707          * Still it's important to update RS about sent vs. acked.
1708          */
1709         if (skb_queue_empty(&reclaimed_skbs)) {
1710                 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1711
1712                 if (mvmsta->vif)
1713                         chanctx_conf =
1714                                 rcu_dereference(mvmsta->vif->chanctx_conf);
1715
1716                 if (WARN_ON_ONCE(!chanctx_conf))
1717                         goto out;
1718
1719                 ba_info->band = chanctx_conf->def.chan->band;
1720                 iwl_mvm_hwrate_to_tx_status(rate, ba_info);
1721
1722                 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
1723                 iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
1724         }
1725
1726 out:
1727         rcu_read_unlock();
1728
1729         while (!skb_queue_empty(&reclaimed_skbs)) {
1730                 skb = __skb_dequeue(&reclaimed_skbs);
1731                 ieee80211_tx_status(mvm->hw, skb);
1732         }
1733 }
1734
1735 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1736 {
1737         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1738         int sta_id, tid, txq, index;
1739         struct ieee80211_tx_info ba_info = {};
1740         struct iwl_mvm_ba_notif *ba_notif;
1741         struct iwl_mvm_tid_data *tid_data;
1742         struct iwl_mvm_sta *mvmsta;
1743
1744         ba_info.flags = IEEE80211_TX_STAT_AMPDU;
1745
1746         if (iwl_mvm_has_new_tx_api(mvm)) {
1747                 struct iwl_mvm_compressed_ba_notif *ba_res =
1748                         (void *)pkt->data;
1749                 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
1750                 int i;
1751
1752                 sta_id = ba_res->sta_id;
1753                 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
1754                 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
1755                 ba_info.status.tx_time =
1756                         (u16)le32_to_cpu(ba_res->wireless_time);
1757                 ba_info.status.status_driver_data[0] =
1758                         (void *)(uintptr_t)ba_res->reduced_txp;
1759
1760                 if (!le16_to_cpu(ba_res->tfd_cnt))
1761                         goto out;
1762
1763                 rcu_read_lock();
1764
1765                 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1766                 if (!mvmsta)
1767                         goto out_unlock;
1768
1769                 /* Free per TID */
1770                 for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) {
1771                         struct iwl_mvm_compressed_ba_tfd *ba_tfd =
1772                                 &ba_res->tfd[i];
1773
1774                         mvmsta->tid_data[i].lq_color = lq_color;
1775                         iwl_mvm_tx_reclaim(mvm, sta_id, ba_tfd->tid,
1776                                            (int)(le16_to_cpu(ba_tfd->q_num)),
1777                                            le16_to_cpu(ba_tfd->tfd_index),
1778                                            &ba_info,
1779                                            le32_to_cpu(ba_res->tx_rate));
1780                 }
1781
1782 out_unlock:
1783                 rcu_read_unlock();
1784 out:
1785                 IWL_DEBUG_TX_REPLY(mvm,
1786                                    "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
1787                                    sta_id, le32_to_cpu(ba_res->flags),
1788                                    le16_to_cpu(ba_res->txed),
1789                                    le16_to_cpu(ba_res->done));
1790                 return;
1791         }
1792
1793         ba_notif = (void *)pkt->data;
1794         sta_id = ba_notif->sta_id;
1795         tid = ba_notif->tid;
1796         /* "flow" corresponds to Tx queue */
1797         txq = le16_to_cpu(ba_notif->scd_flow);
1798         /* "ssn" is start of block-ack Tx window, corresponds to index
1799          * (in Tx queue's circular buffer) of first TFD/frame in window */
1800         index = le16_to_cpu(ba_notif->scd_ssn);
1801
1802         rcu_read_lock();
1803         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1804         if (WARN_ON_ONCE(!mvmsta)) {
1805                 rcu_read_unlock();
1806                 return;
1807         }
1808
1809         tid_data = &mvmsta->tid_data[tid];
1810
1811         ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
1812         ba_info.status.ampdu_len = ba_notif->txed;
1813         ba_info.status.tx_time = tid_data->tx_time;
1814         ba_info.status.status_driver_data[0] =
1815                 (void *)(uintptr_t)ba_notif->reduced_txp;
1816
1817         rcu_read_unlock();
1818
1819         iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
1820                            tid_data->rate_n_flags);
1821
1822         IWL_DEBUG_TX_REPLY(mvm,
1823                            "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1824                            ba_notif->sta_addr, ba_notif->sta_id);
1825
1826         IWL_DEBUG_TX_REPLY(mvm,
1827                            "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1828                            ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1829                            le64_to_cpu(ba_notif->bitmap), txq, index,
1830                            ba_notif->txed, ba_notif->txed_2_done);
1831
1832         IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1833                            ba_notif->reduced_txp);
1834 }
1835
1836 /*
1837  * Note that there are transports that buffer frames before they reach
1838  * the firmware. This means that after flush_tx_path is called, the
1839  * queue might not be empty. The race-free way to handle this is to:
1840  * 1) set the station as draining
1841  * 2) flush the Tx path
1842  * 3) wait for the transport queues to be empty
1843  */
1844 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
1845 {
1846         int ret;
1847         struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
1848                 .queues_ctl = cpu_to_le32(tfd_msk),
1849                 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1850         };
1851
1852         WARN_ON(iwl_mvm_has_new_tx_api(mvm));
1853
1854         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1855                                    sizeof(flush_cmd), &flush_cmd);
1856         if (ret)
1857                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1858         return ret;
1859 }
1860
1861 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id,
1862                            u16 tids, u32 flags)
1863 {
1864         int ret;
1865         struct iwl_tx_path_flush_cmd flush_cmd = {
1866                 .sta_id = cpu_to_le32(sta_id),
1867                 .tid_mask = cpu_to_le16(tids),
1868         };
1869
1870         WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
1871
1872         ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1873                                    sizeof(flush_cmd), &flush_cmd);
1874         if (ret)
1875                 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1876         return ret;
1877 }
1878
1879 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags)
1880 {
1881         struct iwl_mvm_int_sta *int_sta = sta;
1882         struct iwl_mvm_sta *mvm_sta = sta;
1883
1884         if (iwl_mvm_has_new_tx_api(mvm)) {
1885                 if (internal)
1886                         return iwl_mvm_flush_sta_tids(mvm, int_sta->sta_id,
1887                                                       BIT(IWL_MGMT_TID), flags);
1888
1889                 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id,
1890                                               0xFF, flags);
1891         }
1892
1893         if (internal)
1894                 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk,
1895                                              flags);
1896
1897         return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags);
1898 }