1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2014, 2018-2021 Intel Corporation
4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
5 * Copyright (C) 2016-2017 Intel Deutschland GmbH
6 */
7 #include <linux/ieee80211.h>
8 #include <linux/etherdevice.h>
9 #include <linux/tcp.h>
10 #include <net/ip.h>
11 #include <net/ipv6.h>
12
13 #include "iwl-trans.h"
14 #include "iwl-eeprom-parse.h"
15 #include "mvm.h"
16 #include "sta.h"
17
18 static void
iwl_mvm_bar_check_trigger(struct iwl_mvm * mvm,const u8 * addr,u16 tid,u16 ssn)19 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
20 u16 tid, u16 ssn)
21 {
22 struct iwl_fw_dbg_trigger_tlv *trig;
23 struct iwl_fw_dbg_trigger_ba *ba_trig;
24
25 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA);
26 if (!trig)
27 return;
28
29 ba_trig = (void *)trig->data;
30
31 if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
32 return;
33
34 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
35 "BAR sent to %pM, tid %d, ssn %d",
36 addr, tid, ssn);
37 }
38
39 #define OPT_HDR(type, skb, off) \
40 (type *)(skb_network_header(skb) + (off))
41
iwl_mvm_tx_csum_pre_bz(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_tx_info * info,bool amsdu)42 static u16 iwl_mvm_tx_csum_pre_bz(struct iwl_mvm *mvm, struct sk_buff *skb,
43 struct ieee80211_tx_info *info, bool amsdu)
44 {
45 struct ieee80211_hdr *hdr = (void *)skb->data;
46 u16 offload_assist = 0;
47 #if IS_ENABLED(CONFIG_INET)
48 u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
49 u8 protocol = 0;
50
51 /* Do not compute checksum if already computed */
52 if (skb->ip_summed != CHECKSUM_PARTIAL)
53 goto out;
54
55 /* We do not expect to be requested to csum stuff we do not support */
56 if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
57 (skb->protocol != htons(ETH_P_IP) &&
58 skb->protocol != htons(ETH_P_IPV6)),
59 "No support for requested checksum\n")) {
60 skb_checksum_help(skb);
61 goto out;
62 }
63
64 if (skb->protocol == htons(ETH_P_IP)) {
65 protocol = ip_hdr(skb)->protocol;
66 } else {
67 #if IS_ENABLED(CONFIG_IPV6)
68 struct ipv6hdr *ipv6h =
69 (struct ipv6hdr *)skb_network_header(skb);
70 unsigned int off = sizeof(*ipv6h);
71
72 protocol = ipv6h->nexthdr;
73 while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
74 struct ipv6_opt_hdr *hp;
75
76 /* only supported extension headers */
77 if (protocol != NEXTHDR_ROUTING &&
78 protocol != NEXTHDR_HOP &&
79 protocol != NEXTHDR_DEST) {
80 skb_checksum_help(skb);
81 goto out;
82 }
83
84 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
85 protocol = hp->nexthdr;
86 off += ipv6_optlen(hp);
87 }
88 /* if we get here - protocol now should be TCP/UDP */
89 #endif
90 }
91
92 if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
93 WARN_ON_ONCE(1);
94 skb_checksum_help(skb);
95 goto out;
96 }
97
98 /* enable L4 csum */
99 offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
100
101 /*
102 * Set offset to IP header (snap).
103 * We don't support tunneling so no need to take care of inner header.
104 * Size is in words.
105 */
106 offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
107
108 /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
109 if (skb->protocol == htons(ETH_P_IP) && amsdu) {
110 ip_hdr(skb)->check = 0;
111 offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
112 }
113
114 /* reset UDP/TCP header csum */
115 if (protocol == IPPROTO_TCP)
116 tcp_hdr(skb)->check = 0;
117 else
118 udp_hdr(skb)->check = 0;
119
120 /*
121 * mac header len should include IV, size is in words unless
122 * the IV is added by the firmware like in WEP.
123 * In new Tx API, the IV is always added by the firmware.
124 */
125 if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
126 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
127 info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104)
128 mh_len += info->control.hw_key->iv_len;
129 mh_len /= 2;
130 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
131
132 out:
133 #endif
134 if (amsdu)
135 offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
136 else if (ieee80211_hdrlen(hdr->frame_control) % 4)
137 /* padding is inserted later in transport */
138 offload_assist |= BIT(TX_CMD_OFFLD_PAD);
139
140 return offload_assist;
141 }
142
iwl_mvm_tx_csum_bz(struct iwl_mvm * mvm,struct sk_buff * skb,bool amsdu)143 u32 iwl_mvm_tx_csum_bz(struct iwl_mvm *mvm, struct sk_buff *skb, bool amsdu)
144 {
145 struct ieee80211_hdr *hdr = (void *)skb->data;
146 u32 offload_assist = IWL_TX_CMD_OFFLD_BZ_PARTIAL_CSUM;
147 unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
148 unsigned int csum_start = skb_checksum_start_offset(skb);
149
150 offload_assist |= u32_encode_bits(hdrlen / 2,
151 IWL_TX_CMD_OFFLD_BZ_MH_LEN);
152 if (amsdu)
153 offload_assist |= IWL_TX_CMD_OFFLD_BZ_AMSDU;
154 else if (hdrlen % 4)
155 /* padding is inserted later in transport */
156 offload_assist |= IWL_TX_CMD_OFFLD_BZ_MH_PAD;
157
158 if (skb->ip_summed != CHECKSUM_PARTIAL)
159 return offload_assist;
160
161 offload_assist |= IWL_TX_CMD_OFFLD_BZ_ENABLE_CSUM |
162 IWL_TX_CMD_OFFLD_BZ_ZERO2ONES;
163
164 /*
165 * mac80211 will always calculate checksum in software for
166 * non-fast-xmit, and so we can only do offloaded checksum
167 * for fast-xmit frames. In this case, we always have the
168 * RFC 1042 header present. skb_checksum_start_offset()
169 * returns the offset from the beginning, but the hardware
170 * needs it from after the header & SNAP header.
171 */
172 csum_start -= hdrlen + 8;
173
174 offload_assist |= u32_encode_bits(csum_start,
175 IWL_TX_CMD_OFFLD_BZ_START_OFFS);
176 offload_assist |= u32_encode_bits(csum_start + skb->csum_offset,
177 IWL_TX_CMD_OFFLD_BZ_RESULT_OFFS);
178
179 return offload_assist;
180 }
181
iwl_mvm_tx_csum(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_tx_info * info,bool amsdu)182 static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
183 struct ieee80211_tx_info *info,
184 bool amsdu)
185 {
186 if (mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ)
187 return iwl_mvm_tx_csum_pre_bz(mvm, skb, info, amsdu);
188 return iwl_mvm_tx_csum_bz(mvm, skb, amsdu);
189 }
190
191 /*
192 * Sets most of the Tx cmd's fields
193 */
iwl_mvm_set_tx_cmd(struct iwl_mvm * mvm,struct sk_buff * skb,struct iwl_tx_cmd * tx_cmd,struct ieee80211_tx_info * info,u8 sta_id)194 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
195 struct iwl_tx_cmd *tx_cmd,
196 struct ieee80211_tx_info *info, u8 sta_id)
197 {
198 struct ieee80211_hdr *hdr = (void *)skb->data;
199 __le16 fc = hdr->frame_control;
200 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
201 u32 len = skb->len + FCS_LEN;
202 bool amsdu = false;
203 u8 ac;
204
205 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) ||
206 (ieee80211_is_probe_resp(fc) &&
207 !is_multicast_ether_addr(hdr->addr1)))
208 tx_flags |= TX_CMD_FLG_ACK;
209 else
210 tx_flags &= ~TX_CMD_FLG_ACK;
211
212 if (ieee80211_is_probe_resp(fc))
213 tx_flags |= TX_CMD_FLG_TSF;
214
215 if (ieee80211_has_morefrags(fc))
216 tx_flags |= TX_CMD_FLG_MORE_FRAG;
217
218 if (ieee80211_is_data_qos(fc)) {
219 u8 *qc = ieee80211_get_qos_ctl(hdr);
220 tx_cmd->tid_tspec = qc[0] & 0xf;
221 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
222 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
223 } else if (ieee80211_is_back_req(fc)) {
224 struct ieee80211_bar *bar = (void *)skb->data;
225 u16 control = le16_to_cpu(bar->control);
226 u16 ssn = le16_to_cpu(bar->start_seq_num);
227
228 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
229 tx_cmd->tid_tspec = (control &
230 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
231 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
232 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
233 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
234 ssn);
235 } else {
236 if (ieee80211_is_data(fc))
237 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
238 else
239 tx_cmd->tid_tspec = IWL_MAX_TID_COUNT;
240
241 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
242 tx_flags |= TX_CMD_FLG_SEQ_CTL;
243 else
244 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
245 }
246
247 /* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */
248 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
249 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
250 else
251 ac = tid_to_mac80211_ac[0];
252
253 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
254 TX_CMD_FLG_BT_PRIO_POS;
255
256 if (ieee80211_is_mgmt(fc)) {
257 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
258 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
259 else if (ieee80211_is_action(fc))
260 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
261 else
262 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
263
264 /* The spec allows Action frames in A-MPDU, we don't support
265 * it
266 */
267 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
268 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
269 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
270 } else {
271 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
272 }
273
274 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
275 !is_multicast_ether_addr(hdr->addr1))
276 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
277
278 if (fw_has_capa(&mvm->fw->ucode_capa,
279 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
280 ieee80211_action_contains_tpc(skb))
281 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
282
283 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
284 /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
285 tx_cmd->len = cpu_to_le16((u16)skb->len);
286 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
287 tx_cmd->sta_id = sta_id;
288
289 tx_cmd->offload_assist =
290 cpu_to_le16(iwl_mvm_tx_csum_pre_bz(mvm, skb, info, amsdu));
291 }
292
iwl_mvm_get_tx_ant(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,__le16 fc)293 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm,
294 struct ieee80211_tx_info *info,
295 struct ieee80211_sta *sta, __le16 fc)
296 {
297 if (info->band == NL80211_BAND_2GHZ &&
298 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
299 return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
300
301 if (sta && ieee80211_is_data(fc)) {
302 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
303
304 return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS;
305 }
306
307 return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
308 }
309
iwl_mvm_get_tx_rate(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,__le16 fc)310 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
311 struct ieee80211_tx_info *info,
312 struct ieee80211_sta *sta, __le16 fc)
313 {
314 int rate_idx = -1;
315 u8 rate_plcp;
316 u32 rate_flags = 0;
317 bool is_cck;
318
319 /* info->control is only relevant for non HW rate control */
320 if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) {
321 /* HT rate doesn't make sense for a non data frame */
322 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS &&
323 !ieee80211_is_data(fc),
324 "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n",
325 info->control.rates[0].flags,
326 info->control.rates[0].idx,
327 le16_to_cpu(fc),
328 sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1);
329
330 rate_idx = info->control.rates[0].idx;
331 }
332
333 /* if the rate isn't a well known legacy rate, take the lowest one */
334 if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
335 rate_idx = rate_lowest_index(
336 &mvm->nvm_data->bands[info->band], sta);
337
338 /*
339 * For non 2 GHZ band, remap mac80211 rate
340 * indices into driver indices
341 */
342 if (info->band != NL80211_BAND_2GHZ)
343 rate_idx += IWL_FIRST_OFDM_RATE;
344
345 /* For 2.4 GHZ band, check that there is no need to remap */
346 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
347
348 /* Get PLCP rate for tx_cmd->rate_n_flags */
349 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx);
350 is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE);
351
352 /* Set CCK or OFDM flag */
353 if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) {
354 if (!is_cck)
355 rate_flags |= RATE_MCS_LEGACY_OFDM_MSK;
356 else
357 rate_flags |= RATE_MCS_CCK_MSK;
358 } else if (is_cck) {
359 rate_flags |= RATE_MCS_CCK_MSK_V1;
360 }
361
362 return (u32)rate_plcp | rate_flags;
363 }
364
iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,__le16 fc)365 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,
366 struct ieee80211_tx_info *info,
367 struct ieee80211_sta *sta, __le16 fc)
368 {
369 return iwl_mvm_get_tx_rate(mvm, info, sta, fc) |
370 iwl_mvm_get_tx_ant(mvm, info, sta, fc);
371 }
372
373 /*
374 * Sets the fields in the Tx cmd that are rate related
375 */
iwl_mvm_set_tx_cmd_rate(struct iwl_mvm * mvm,struct iwl_tx_cmd * tx_cmd,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,__le16 fc)376 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
377 struct ieee80211_tx_info *info,
378 struct ieee80211_sta *sta, __le16 fc)
379 {
380 /* Set retry limit on RTS packets */
381 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
382
383 /* Set retry limit on DATA packets and Probe Responses*/
384 if (ieee80211_is_probe_resp(fc)) {
385 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
386 tx_cmd->rts_retry_limit =
387 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
388 } else if (ieee80211_is_back_req(fc)) {
389 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
390 } else {
391 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
392 }
393
394 /*
395 * for data packets, rate info comes from the table inside the fw. This
396 * table is controlled by LINK_QUALITY commands
397 */
398
399 if (ieee80211_is_data(fc) && sta) {
400 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
401
402 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
403 tx_cmd->initial_rate_index = 0;
404 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
405 return;
406 }
407 } else if (ieee80211_is_back_req(fc)) {
408 tx_cmd->tx_flags |=
409 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
410 }
411
412 /* Set the rate in the TX cmd */
413 tx_cmd->rate_n_flags =
414 cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc));
415 }
416
iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info * info,u8 * crypto_hdr)417 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
418 u8 *crypto_hdr)
419 {
420 struct ieee80211_key_conf *keyconf = info->control.hw_key;
421 u64 pn;
422
423 pn = atomic64_inc_return(&keyconf->tx_pn);
424 crypto_hdr[0] = pn;
425 crypto_hdr[2] = 0;
426 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
427 crypto_hdr[1] = pn >> 8;
428 crypto_hdr[4] = pn >> 16;
429 crypto_hdr[5] = pn >> 24;
430 crypto_hdr[6] = pn >> 32;
431 crypto_hdr[7] = pn >> 40;
432 }
433
434 /*
435 * Sets the fields in the Tx cmd that are crypto related
436 */
iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct iwl_tx_cmd * tx_cmd,struct sk_buff * skb_frag,int hdrlen)437 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
438 struct ieee80211_tx_info *info,
439 struct iwl_tx_cmd *tx_cmd,
440 struct sk_buff *skb_frag,
441 int hdrlen)
442 {
443 struct ieee80211_key_conf *keyconf = info->control.hw_key;
444 u8 *crypto_hdr = skb_frag->data + hdrlen;
445 enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;
446 u64 pn;
447
448 switch (keyconf->cipher) {
449 case WLAN_CIPHER_SUITE_CCMP:
450 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
451 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
452 break;
453
454 case WLAN_CIPHER_SUITE_TKIP:
455 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
456 pn = atomic64_inc_return(&keyconf->tx_pn);
457 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
458 ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
459 break;
460
461 case WLAN_CIPHER_SUITE_WEP104:
462 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
463 fallthrough;
464 case WLAN_CIPHER_SUITE_WEP40:
465 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
466 ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
467 TX_CMD_SEC_WEP_KEY_IDX_MSK);
468
469 memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
470 break;
471 case WLAN_CIPHER_SUITE_GCMP:
472 case WLAN_CIPHER_SUITE_GCMP_256:
473 type = TX_CMD_SEC_GCMP;
474 fallthrough;
475 case WLAN_CIPHER_SUITE_CCMP_256:
476 /* TODO: Taking the key from the table might introduce a race
477 * when PTK rekeying is done, having an old packets with a PN
478 * based on the old key but the message encrypted with a new
479 * one.
480 * Need to handle this.
481 */
482 tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;
483 tx_cmd->key[0] = keyconf->hw_key_idx;
484 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
485 break;
486 default:
487 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
488 }
489 }
490
491 /*
492 * Allocates and sets the Tx cmd the driver data pointers in the skb
493 */
494 static struct iwl_device_tx_cmd *
iwl_mvm_set_tx_params(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_tx_info * info,int hdrlen,struct ieee80211_sta * sta,u8 sta_id)495 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
496 struct ieee80211_tx_info *info, int hdrlen,
497 struct ieee80211_sta *sta, u8 sta_id)
498 {
499 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
500 struct iwl_device_tx_cmd *dev_cmd;
501 struct iwl_tx_cmd *tx_cmd;
502
503 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
504
505 if (unlikely(!dev_cmd))
506 return NULL;
507
508 dev_cmd->hdr.cmd = TX_CMD;
509
510 if (iwl_mvm_has_new_tx_api(mvm)) {
511 u32 rate_n_flags = 0;
512 u16 flags = 0;
513 struct iwl_mvm_sta *mvmsta = sta ?
514 iwl_mvm_sta_from_mac80211(sta) : NULL;
515 bool amsdu = false;
516
517 if (ieee80211_is_data_qos(hdr->frame_control)) {
518 u8 *qc = ieee80211_get_qos_ctl(hdr);
519
520 amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
521 }
522
523 if (!info->control.hw_key)
524 flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
525
526 /*
527 * For data packets rate info comes from the fw. Only
528 * set rate/antenna during connection establishment or in case
529 * no station is given.
530 */
531 if (!sta || !ieee80211_is_data(hdr->frame_control) ||
532 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
533 flags |= IWL_TX_FLAGS_CMD_RATE;
534 rate_n_flags =
535 iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
536 hdr->frame_control);
537 }
538
539 if (mvm->trans->trans_cfg->device_family >=
540 IWL_DEVICE_FAMILY_AX210) {
541 struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
542 u32 offload_assist = iwl_mvm_tx_csum(mvm, skb,
543 info, amsdu);
544
545 cmd->offload_assist = cpu_to_le32(offload_assist);
546
547 /* Total # bytes to be transmitted */
548 cmd->len = cpu_to_le16((u16)skb->len);
549
550 /* Copy MAC header from skb into command buffer */
551 memcpy(cmd->hdr, hdr, hdrlen);
552
553 cmd->flags = cpu_to_le16(flags);
554 cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
555 } else {
556 struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
557 u16 offload_assist = iwl_mvm_tx_csum_pre_bz(mvm, skb,
558 info,
559 amsdu);
560
561 cmd->offload_assist = cpu_to_le16(offload_assist);
562
563 /* Total # bytes to be transmitted */
564 cmd->len = cpu_to_le16((u16)skb->len);
565
566 /* Copy MAC header from skb into command buffer */
567 memcpy(cmd->hdr, hdr, hdrlen);
568
569 cmd->flags = cpu_to_le32(flags);
570 cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
571 }
572 goto out;
573 }
574
575 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
576
577 if (info->control.hw_key)
578 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
579
580 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
581
582 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
583
584 /* Copy MAC header from skb into command buffer */
585 memcpy(tx_cmd->hdr, hdr, hdrlen);
586
587 out:
588 return dev_cmd;
589 }
590
iwl_mvm_skb_prepare_status(struct sk_buff * skb,struct iwl_device_tx_cmd * cmd)591 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
592 struct iwl_device_tx_cmd *cmd)
593 {
594 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
595
596 memset(&skb_info->status, 0, sizeof(skb_info->status));
597 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
598
599 skb_info->driver_data[1] = cmd;
600 }
601
iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm * mvm,struct ieee80211_tx_info * info,struct ieee80211_hdr * hdr)602 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
603 struct ieee80211_tx_info *info,
604 struct ieee80211_hdr *hdr)
605 {
606 struct iwl_mvm_vif *mvmvif =
607 iwl_mvm_vif_from_mac80211(info->control.vif);
608 __le16 fc = hdr->frame_control;
609
610 switch (info->control.vif->type) {
611 case NL80211_IFTYPE_AP:
612 case NL80211_IFTYPE_ADHOC:
613 /*
614 * Non-bufferable frames use the broadcast station, thus they
615 * use the probe queue.
616 * Also take care of the case where we send a deauth to a
617 * station that we don't have, or similarly an association
618 * response (with non-success status) for a station we can't
619 * accept.
620 * Also, disassociate frames might happen, particular with
621 * reason 7 ("Class 3 frame received from nonassociated STA").
622 */
623 if (ieee80211_is_mgmt(fc) &&
624 (!ieee80211_is_bufferable_mmpdu(fc) ||
625 ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
626 return mvm->probe_queue;
627
628 if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
629 is_multicast_ether_addr(hdr->addr1))
630 return mvmvif->cab_queue;
631
632 WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
633 "fc=0x%02x", le16_to_cpu(fc));
634 return mvm->probe_queue;
635 case NL80211_IFTYPE_P2P_DEVICE:
636 if (ieee80211_is_mgmt(fc))
637 return mvm->p2p_dev_queue;
638
639 WARN_ON_ONCE(1);
640 return mvm->p2p_dev_queue;
641 default:
642 WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
643 return -1;
644 }
645 }
646
iwl_mvm_probe_resp_set_noa(struct iwl_mvm * mvm,struct sk_buff * skb)647 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
648 struct sk_buff *skb)
649 {
650 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
651 struct iwl_mvm_vif *mvmvif =
652 iwl_mvm_vif_from_mac80211(info->control.vif);
653 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
654 int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
655 struct iwl_probe_resp_data *resp_data;
656 const u8 *ie;
657 u8 *pos;
658 u8 match[] = {
659 (WLAN_OUI_WFA >> 16) & 0xff,
660 (WLAN_OUI_WFA >> 8) & 0xff,
661 WLAN_OUI_WFA & 0xff,
662 WLAN_OUI_TYPE_WFA_P2P,
663 };
664
665 rcu_read_lock();
666
667 resp_data = rcu_dereference(mvmvif->probe_resp_data);
668 if (!resp_data)
669 goto out;
670
671 if (!resp_data->notif.noa_active)
672 goto out;
673
674 ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
675 mgmt->u.probe_resp.variable,
676 skb->len - base_len,
677 match, 4, 2);
678 if (!ie) {
679 IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
680 goto out;
681 }
682
683 if (skb_tailroom(skb) < resp_data->noa_len) {
684 if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
685 IWL_ERR(mvm,
686 "Failed to reallocate probe resp\n");
687 goto out;
688 }
689 }
690
691 pos = skb_put(skb, resp_data->noa_len);
692
693 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
694 /* Set length of IE body (not including ID and length itself) */
695 *pos++ = resp_data->noa_len - 2;
696 *pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
697 *pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
698 *pos++ = WLAN_OUI_WFA & 0xff;
699 *pos++ = WLAN_OUI_TYPE_WFA_P2P;
700
701 memcpy(pos, &resp_data->notif.noa_attr,
702 resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
703
704 out:
705 rcu_read_unlock();
706 }
707
iwl_mvm_tx_skb_non_sta(struct iwl_mvm * mvm,struct sk_buff * skb)708 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
709 {
710 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
711 struct ieee80211_tx_info info;
712 struct iwl_device_tx_cmd *dev_cmd;
713 u8 sta_id;
714 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
715 __le16 fc = hdr->frame_control;
716 bool offchannel = IEEE80211_SKB_CB(skb)->flags &
717 IEEE80211_TX_CTL_TX_OFFCHAN;
718 int queue = -1;
719
720 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
721 return -1;
722
723 memcpy(&info, skb->cb, sizeof(info));
724
725 if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
726 return -1;
727
728 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
729 return -1;
730
731 if (info.control.vif) {
732 struct iwl_mvm_vif *mvmvif =
733 iwl_mvm_vif_from_mac80211(info.control.vif);
734
735 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
736 info.control.vif->type == NL80211_IFTYPE_AP ||
737 info.control.vif->type == NL80211_IFTYPE_ADHOC) {
738 if (!ieee80211_is_data(hdr->frame_control))
739 sta_id = mvmvif->bcast_sta.sta_id;
740 else
741 sta_id = mvmvif->mcast_sta.sta_id;
742
743 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr);
744 } else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
745 queue = mvm->snif_queue;
746 sta_id = mvm->snif_sta.sta_id;
747 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
748 offchannel) {
749 /*
750 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
751 * that can be used in 2 different types of vifs, P2P &
752 * STATION.
753 * P2P uses the offchannel queue.
754 * STATION (HS2.0) uses the auxiliary context of the FW,
755 * and hence needs to be sent on the aux queue.
756 */
757 sta_id = mvm->aux_sta.sta_id;
758 queue = mvm->aux_queue;
759 }
760 }
761
762 if (queue < 0) {
763 IWL_ERR(mvm, "No queue was found. Dropping TX\n");
764 return -1;
765 }
766
767 if (unlikely(ieee80211_is_probe_resp(fc)))
768 iwl_mvm_probe_resp_set_noa(mvm, skb);
769
770 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
771
772 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
773 if (!dev_cmd)
774 return -1;
775
776 /* From now on, we cannot access info->control */
777 iwl_mvm_skb_prepare_status(skb, dev_cmd);
778
779 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
780 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
781 return -1;
782 }
783
784 return 0;
785 }
786
iwl_mvm_max_amsdu_size(struct iwl_mvm * mvm,struct ieee80211_sta * sta,unsigned int tid)787 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
788 struct ieee80211_sta *sta, unsigned int tid)
789 {
790 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
791 enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band;
792 u8 ac = tid_to_mac80211_ac[tid];
793 unsigned int txf;
794 int lmac = iwl_mvm_get_lmac_id(mvm->fw, band);
795
796 /* For HE redirect to trigger based fifos */
797 if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
798 ac += 4;
799
800 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
801
802 /*
803 * Don't send an AMSDU that will be longer than the TXF.
804 * Add a security margin of 256 for the TX command + headers.
805 * We also want to have the start of the next packet inside the
806 * fifo to be able to send bursts.
807 */
808 return min_t(unsigned int, mvmsta->max_amsdu_len,
809 mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
810 }
811
812 #ifdef CONFIG_INET
813
814 static int
iwl_mvm_tx_tso_segment(struct sk_buff * skb,unsigned int num_subframes,netdev_features_t netdev_flags,struct sk_buff_head * mpdus_skb)815 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
816 netdev_features_t netdev_flags,
817 struct sk_buff_head *mpdus_skb)
818 {
819 struct sk_buff *tmp, *next;
820 struct ieee80211_hdr *hdr = (void *)skb->data;
821 char cb[sizeof(skb->cb)];
822 u16 i = 0;
823 unsigned int tcp_payload_len;
824 unsigned int mss = skb_shinfo(skb)->gso_size;
825 bool ipv4 = (skb->protocol == htons(ETH_P_IP));
826 bool qos = ieee80211_is_data_qos(hdr->frame_control);
827 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
828
829 skb_shinfo(skb)->gso_size = num_subframes * mss;
830 memcpy(cb, skb->cb, sizeof(cb));
831
832 next = skb_gso_segment(skb, netdev_flags);
833 skb_shinfo(skb)->gso_size = mss;
834 skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
835 if (WARN_ON_ONCE(IS_ERR(next)))
836 return -EINVAL;
837 else if (next)
838 consume_skb(skb);
839
840 skb_list_walk_safe(next, tmp, next) {
841 memcpy(tmp->cb, cb, sizeof(tmp->cb));
842 /*
843 * Compute the length of all the data added for the A-MSDU.
844 * This will be used to compute the length to write in the TX
845 * command. We have: SNAP + IP + TCP for n -1 subframes and
846 * ETH header for n subframes.
847 */
848 tcp_payload_len = skb_tail_pointer(tmp) -
849 skb_transport_header(tmp) -
850 tcp_hdrlen(tmp) + tmp->data_len;
851
852 if (ipv4)
853 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
854
855 if (tcp_payload_len > mss) {
856 skb_shinfo(tmp)->gso_size = mss;
857 skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 :
858 SKB_GSO_TCPV6;
859 } else {
860 if (qos) {
861 u8 *qc;
862
863 if (ipv4)
864 ip_send_check(ip_hdr(tmp));
865
866 qc = ieee80211_get_qos_ctl((void *)tmp->data);
867 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
868 }
869 skb_shinfo(tmp)->gso_size = 0;
870 }
871
872 skb_mark_not_on_list(tmp);
873 __skb_queue_tail(mpdus_skb, tmp);
874 i++;
875 }
876
877 return 0;
878 }
879
iwl_mvm_tx_tso(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,struct sk_buff_head * mpdus_skb)880 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
881 struct ieee80211_tx_info *info,
882 struct ieee80211_sta *sta,
883 struct sk_buff_head *mpdus_skb)
884 {
885 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
886 struct ieee80211_hdr *hdr = (void *)skb->data;
887 unsigned int mss = skb_shinfo(skb)->gso_size;
888 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
889 u16 snap_ip_tcp, pad;
890 netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
891 u8 tid;
892
893 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
894 tcp_hdrlen(skb);
895
896 if (!mvmsta->max_amsdu_len ||
897 !ieee80211_is_data_qos(hdr->frame_control) ||
898 !mvmsta->amsdu_enabled)
899 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
900
901 /*
902 * Do not build AMSDU for IPv6 with extension headers.
903 * ask stack to segment and checkum the generated MPDUs for us.
904 */
905 if (skb->protocol == htons(ETH_P_IPV6) &&
906 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
907 IPPROTO_TCP) {
908 netdev_flags &= ~NETIF_F_CSUM_MASK;
909 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
910 }
911
912 tid = ieee80211_get_tid(hdr);
913 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
914 return -EINVAL;
915
916 /*
917 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
918 * during an BA session.
919 */
920 if ((info->flags & IEEE80211_TX_CTL_AMPDU &&
921 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) ||
922 !(mvmsta->amsdu_enabled & BIT(tid)))
923 return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
924
925 /*
926 * Take the min of ieee80211 station and mvm station
927 */
928 max_amsdu_len =
929 min_t(unsigned int, sta->cur->max_amsdu_len,
930 iwl_mvm_max_amsdu_size(mvm, sta, tid));
931
932 /*
933 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
934 * supported. This is a spec requirement (IEEE 802.11-2015
935 * section 8.7.3 NOTE 3).
936 */
937 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
938 !sta->deflink.vht_cap.vht_supported)
939 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
940
941 /* Sub frame header + SNAP + IP header + TCP header + MSS */
942 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
943 pad = (4 - subf_len) & 0x3;
944
945 /*
946 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
947 * N * subf_len + (N - 1) * pad.
948 */
949 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
950
951 if (sta->max_amsdu_subframes &&
952 num_subframes > sta->max_amsdu_subframes)
953 num_subframes = sta->max_amsdu_subframes;
954
955 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
956 tcp_hdrlen(skb) + skb->data_len;
957
958 /*
959 * Make sure we have enough TBs for the A-MSDU:
960 * 2 for each subframe
961 * 1 more for each fragment
962 * 1 more for the potential data in the header
963 */
964 if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
965 mvm->trans->max_skb_frags)
966 num_subframes = 1;
967
968 if (num_subframes > 1)
969 *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
970
971 /* This skb fits in one single A-MSDU */
972 if (num_subframes * mss >= tcp_payload_len) {
973 __skb_queue_tail(mpdus_skb, skb);
974 return 0;
975 }
976
977 /*
978 * Trick the segmentation function to make it
979 * create SKBs that can fit into one A-MSDU.
980 */
981 return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
982 mpdus_skb);
983 }
984 #else /* CONFIG_INET */
iwl_mvm_tx_tso(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_tx_info * info,struct ieee80211_sta * sta,struct sk_buff_head * mpdus_skb)985 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
986 struct ieee80211_tx_info *info,
987 struct ieee80211_sta *sta,
988 struct sk_buff_head *mpdus_skb)
989 {
990 /* Impossible to get TSO with CONFIG_INET */
991 WARN_ON(1);
992
993 return -1;
994 }
995 #endif
996
997 /* Check if there are any timed-out TIDs on a given shared TXQ */
iwl_mvm_txq_should_update(struct iwl_mvm * mvm,int txq_id)998 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
999 {
1000 unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1001 unsigned long now = jiffies;
1002 int tid;
1003
1004 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1005 return false;
1006
1007 for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1008 if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1009 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1010 return true;
1011 }
1012
1013 return false;
1014 }
1015
iwl_mvm_tx_airtime(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,int airtime)1016 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1017 struct iwl_mvm_sta *mvmsta,
1018 int airtime)
1019 {
1020 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1021 struct iwl_mvm_tcm_mac *mdata;
1022
1023 if (mac >= NUM_MAC_INDEX_DRIVER)
1024 return;
1025
1026 mdata = &mvm->tcm.data[mac];
1027
1028 if (mvm->tcm.paused)
1029 return;
1030
1031 if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1032 schedule_delayed_work(&mvm->tcm.work, 0);
1033
1034 mdata->tx.airtime += airtime;
1035 }
1036
iwl_mvm_tx_pkt_queued(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,int tid)1037 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1038 struct iwl_mvm_sta *mvmsta, int tid)
1039 {
1040 u32 ac = tid_to_mac80211_ac[tid];
1041 int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1042 struct iwl_mvm_tcm_mac *mdata;
1043
1044 if (mac >= NUM_MAC_INDEX_DRIVER)
1045 return -EINVAL;
1046
1047 mdata = &mvm->tcm.data[mac];
1048
1049 mdata->tx.pkts[ac]++;
1050
1051 return 0;
1052 }
1053
1054 /*
1055 * Sets the fields in the Tx cmd that are crypto related.
1056 *
1057 * This function must be called with BHs disabled.
1058 */
iwl_mvm_tx_mpdu(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_tx_info * info,struct ieee80211_sta * sta)1059 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1060 struct ieee80211_tx_info *info,
1061 struct ieee80211_sta *sta)
1062 {
1063 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1064 struct iwl_mvm_sta *mvmsta;
1065 struct iwl_device_tx_cmd *dev_cmd;
1066 __le16 fc;
1067 u16 seq_number = 0;
1068 u8 tid = IWL_MAX_TID_COUNT;
1069 u16 txq_id;
1070 bool is_ampdu = false;
1071 int hdrlen;
1072
1073 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1074 fc = hdr->frame_control;
1075 hdrlen = ieee80211_hdrlen(fc);
1076
1077 if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
1078 return -1;
1079
1080 if (WARN_ON_ONCE(!mvmsta))
1081 return -1;
1082
1083 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1084 return -1;
1085
1086 if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he)
1087 return -1;
1088
1089 if (unlikely(ieee80211_is_probe_resp(fc)))
1090 iwl_mvm_probe_resp_set_noa(mvm, skb);
1091
1092 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1093 sta, mvmsta->sta_id);
1094 if (!dev_cmd)
1095 goto drop;
1096
1097 /*
1098 * we handle that entirely ourselves -- for uAPSD the firmware
1099 * will always send a notification, and for PS-Poll responses
1100 * we'll notify mac80211 when getting frame status
1101 */
1102 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1103
1104 spin_lock(&mvmsta->lock);
1105
1106 /* nullfunc frames should go to the MGMT queue regardless of QOS,
1107 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
1108 * assignment of MGMT TID
1109 */
1110 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1111 tid = ieee80211_get_tid(hdr);
1112 if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1113 goto drop_unlock_sta;
1114
1115 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1116 if (WARN_ONCE(is_ampdu &&
1117 mvmsta->tid_data[tid].state != IWL_AGG_ON,
1118 "Invalid internal agg state %d for TID %d",
1119 mvmsta->tid_data[tid].state, tid))
1120 goto drop_unlock_sta;
1121
1122 seq_number = mvmsta->tid_data[tid].seq_number;
1123 seq_number &= IEEE80211_SCTL_SEQ;
1124
1125 if (!iwl_mvm_has_new_tx_api(mvm)) {
1126 struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1127
1128 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1129 hdr->seq_ctrl |= cpu_to_le16(seq_number);
1130 /* update the tx_cmd hdr as it was already copied */
1131 tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1132 }
1133 } else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) {
1134 tid = IWL_TID_NON_QOS;
1135 }
1136
1137 txq_id = mvmsta->tid_data[tid].txq_id;
1138
1139 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1140
1141 if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1142 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1143 spin_unlock(&mvmsta->lock);
1144 return -1;
1145 }
1146
1147 if (!iwl_mvm_has_new_tx_api(mvm)) {
1148 /* Keep track of the time of the last frame for this RA/TID */
1149 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1150
1151 /*
1152 * If we have timed-out TIDs - schedule the worker that will
1153 * reconfig the queues and update them
1154 *
1155 * Note that the no lock is taken here in order to not serialize
1156 * the TX flow. This isn't dangerous because scheduling
1157 * mvm->add_stream_wk can't ruin the state, and if we DON'T
1158 * schedule it due to some race condition then next TX we get
1159 * here we will.
1160 */
1161 if (unlikely(mvm->queue_info[txq_id].status ==
1162 IWL_MVM_QUEUE_SHARED &&
1163 iwl_mvm_txq_should_update(mvm, txq_id)))
1164 schedule_work(&mvm->add_stream_wk);
1165 }
1166
1167 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n",
1168 mvmsta->sta_id, tid, txq_id,
1169 IEEE80211_SEQ_TO_SN(seq_number), skb->len);
1170
1171 /* From now on, we cannot access info->control */
1172 iwl_mvm_skb_prepare_status(skb, dev_cmd);
1173
1174 /*
1175 * The IV is introduced by the HW for new tx api, and it is not present
1176 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the
1177 * IV for those devices.
1178 */
1179 if (ieee80211_is_data(fc))
1180 iwl_mvm_mei_tx_copy_to_csme(mvm, skb,
1181 info->control.hw_key &&
1182 !iwl_mvm_has_new_tx_api(mvm) ?
1183 info->control.hw_key->iv_len : 0);
1184
1185 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1186 goto drop_unlock_sta;
1187
1188 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1189 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1190
1191 spin_unlock(&mvmsta->lock);
1192
1193 if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1194 tid == IWL_MAX_TID_COUNT ? 0 : tid))
1195 goto drop;
1196
1197 return 0;
1198
1199 drop_unlock_sta:
1200 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1201 spin_unlock(&mvmsta->lock);
1202 drop:
1203 IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid);
1204 return -1;
1205 }
1206
iwl_mvm_tx_skb_sta(struct iwl_mvm * mvm,struct sk_buff * skb,struct ieee80211_sta * sta)1207 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb,
1208 struct ieee80211_sta *sta)
1209 {
1210 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1211 struct ieee80211_tx_info info;
1212 struct sk_buff_head mpdus_skbs;
1213 unsigned int payload_len;
1214 int ret;
1215 struct sk_buff *orig_skb = skb;
1216
1217 if (WARN_ON_ONCE(!mvmsta))
1218 return -1;
1219
1220 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1221 return -1;
1222
1223 memcpy(&info, skb->cb, sizeof(info));
1224
1225 if (!skb_is_gso(skb))
1226 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1227
1228 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1229 tcp_hdrlen(skb) + skb->data_len;
1230
1231 if (payload_len <= skb_shinfo(skb)->gso_size)
1232 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1233
1234 __skb_queue_head_init(&mpdus_skbs);
1235
1236 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1237 if (ret)
1238 return ret;
1239
1240 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1241 return ret;
1242
1243 while (!skb_queue_empty(&mpdus_skbs)) {
1244 skb = __skb_dequeue(&mpdus_skbs);
1245
1246 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1247 if (ret) {
1248 /* Free skbs created as part of TSO logic that have not yet been dequeued */
1249 __skb_queue_purge(&mpdus_skbs);
1250 /* skb here is not necessarily same as skb that entered this method,
1251 * so free it explicitly.
1252 */
1253 if (skb == orig_skb)
1254 ieee80211_free_txskb(mvm->hw, skb);
1255 else
1256 kfree_skb(skb);
1257 /* there was error, but we consumed skb one way or another, so return 0 */
1258 return 0;
1259 }
1260 }
1261
1262 return 0;
1263 }
1264
iwl_mvm_check_ratid_empty(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 tid)1265 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1266 struct ieee80211_sta *sta, u8 tid)
1267 {
1268 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1269 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1270 struct ieee80211_vif *vif = mvmsta->vif;
1271 u16 normalized_ssn;
1272
1273 lockdep_assert_held(&mvmsta->lock);
1274
1275 if ((tid_data->state == IWL_AGG_ON ||
1276 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1277 iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1278 /*
1279 * Now that this aggregation or DQA queue is empty tell
1280 * mac80211 so it knows we no longer have frames buffered for
1281 * the station on this TID (for the TIM bitmap calculation.)
1282 */
1283 ieee80211_sta_set_buffered(sta, tid, false);
1284 }
1285
1286 /*
1287 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1288 * to align the wrap around of ssn so we compare relevant values.
1289 */
1290 normalized_ssn = tid_data->ssn;
1291 if (mvm->trans->trans_cfg->gen2)
1292 normalized_ssn &= 0xff;
1293
1294 if (normalized_ssn != tid_data->next_reclaimed)
1295 return;
1296
1297 switch (tid_data->state) {
1298 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1299 IWL_DEBUG_TX_QUEUES(mvm,
1300 "Can continue addBA flow ssn = next_recl = %d\n",
1301 tid_data->next_reclaimed);
1302 tid_data->state = IWL_AGG_STARTING;
1303 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1304 break;
1305
1306 case IWL_EMPTYING_HW_QUEUE_DELBA:
1307 IWL_DEBUG_TX_QUEUES(mvm,
1308 "Can continue DELBA flow ssn = next_recl = %d\n",
1309 tid_data->next_reclaimed);
1310 tid_data->state = IWL_AGG_OFF;
1311 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1312 break;
1313
1314 default:
1315 break;
1316 }
1317 }
1318
1319 #ifdef CONFIG_IWLWIFI_DEBUG
iwl_mvm_get_tx_fail_reason(u32 status)1320 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1321 {
1322 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1323 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1324
1325 switch (status & TX_STATUS_MSK) {
1326 case TX_STATUS_SUCCESS:
1327 return "SUCCESS";
1328 TX_STATUS_POSTPONE(DELAY);
1329 TX_STATUS_POSTPONE(FEW_BYTES);
1330 TX_STATUS_POSTPONE(BT_PRIO);
1331 TX_STATUS_POSTPONE(QUIET_PERIOD);
1332 TX_STATUS_POSTPONE(CALC_TTAK);
1333 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1334 TX_STATUS_FAIL(SHORT_LIMIT);
1335 TX_STATUS_FAIL(LONG_LIMIT);
1336 TX_STATUS_FAIL(UNDERRUN);
1337 TX_STATUS_FAIL(DRAIN_FLOW);
1338 TX_STATUS_FAIL(RFKILL_FLUSH);
1339 TX_STATUS_FAIL(LIFE_EXPIRE);
1340 TX_STATUS_FAIL(DEST_PS);
1341 TX_STATUS_FAIL(HOST_ABORTED);
1342 TX_STATUS_FAIL(BT_RETRY);
1343 TX_STATUS_FAIL(STA_INVALID);
1344 TX_STATUS_FAIL(FRAG_DROPPED);
1345 TX_STATUS_FAIL(TID_DISABLE);
1346 TX_STATUS_FAIL(FIFO_FLUSHED);
1347 TX_STATUS_FAIL(SMALL_CF_POLL);
1348 TX_STATUS_FAIL(FW_DROP);
1349 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1350 }
1351
1352 return "UNKNOWN";
1353
1354 #undef TX_STATUS_FAIL
1355 #undef TX_STATUS_POSTPONE
1356 }
1357 #endif /* CONFIG_IWLWIFI_DEBUG */
1358
iwl_mvm_get_hwrate_chan_width(u32 chan_width)1359 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width)
1360 {
1361 switch (chan_width) {
1362 case RATE_MCS_CHAN_WIDTH_20:
1363 return 0;
1364 case RATE_MCS_CHAN_WIDTH_40:
1365 return IEEE80211_TX_RC_40_MHZ_WIDTH;
1366 case RATE_MCS_CHAN_WIDTH_80:
1367 return IEEE80211_TX_RC_80_MHZ_WIDTH;
1368 case RATE_MCS_CHAN_WIDTH_160:
1369 return IEEE80211_TX_RC_160_MHZ_WIDTH;
1370 default:
1371 return 0;
1372 }
1373 }
1374
iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,enum nl80211_band band,struct ieee80211_tx_rate * r)1375 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1376 enum nl80211_band band,
1377 struct ieee80211_tx_rate *r)
1378 {
1379 u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
1380 u32 rate = format == RATE_MCS_HT_MSK ?
1381 RATE_HT_MCS_INDEX(rate_n_flags) :
1382 rate_n_flags & RATE_MCS_CODE_MSK;
1383
1384 r->flags |=
1385 iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1386 RATE_MCS_CHAN_WIDTH_MSK);
1387
1388 if (rate_n_flags & RATE_MCS_SGI_MSK)
1389 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1390 if (format == RATE_MCS_HT_MSK) {
1391 r->flags |= IEEE80211_TX_RC_MCS;
1392 r->idx = rate;
1393 } else if (format == RATE_MCS_VHT_MSK) {
1394 ieee80211_rate_set_vht(r, rate,
1395 ((rate_n_flags & RATE_MCS_NSS_MSK) >>
1396 RATE_MCS_NSS_POS) + 1);
1397 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1398 } else if (format == RATE_MCS_HE_MSK) {
1399 /* mac80211 cannot do this without ieee80211_tx_status_ext()
1400 * but it only matters for radiotap */
1401 r->idx = 0;
1402 } else {
1403 r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags,
1404 band);
1405 }
1406 }
1407
iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags,enum nl80211_band band,struct ieee80211_tx_rate * r)1408 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags,
1409 enum nl80211_band band,
1410 struct ieee80211_tx_rate *r)
1411 {
1412 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1413 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1414
1415 r->flags |=
1416 iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1417 RATE_MCS_CHAN_WIDTH_MSK_V1);
1418
1419 if (rate_n_flags & RATE_MCS_SGI_MSK_V1)
1420 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1421 if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
1422 r->flags |= IEEE80211_TX_RC_MCS;
1423 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
1424 } else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
1425 ieee80211_rate_set_vht(
1426 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1427 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1428 RATE_VHT_MCS_NSS_POS) + 1);
1429 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1430 } else {
1431 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1432 band);
1433 }
1434 }
1435
1436 /*
1437 * translate ucode response to mac80211 tx status control values
1438 */
iwl_mvm_hwrate_to_tx_status(const struct iwl_fw * fw,u32 rate_n_flags,struct ieee80211_tx_info * info)1439 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw,
1440 u32 rate_n_flags,
1441 struct ieee80211_tx_info *info)
1442 {
1443 struct ieee80211_tx_rate *r = &info->status.rates[0];
1444
1445 if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP,
1446 TX_CMD, 0) <= 6)
1447 rate_n_flags = iwl_new_rate_from_v1(rate_n_flags);
1448
1449 info->status.antenna =
1450 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS);
1451 iwl_mvm_hwrate_to_tx_rate(rate_n_flags,
1452 info->band, r);
1453 }
1454
iwl_mvm_tx_status_check_trigger(struct iwl_mvm * mvm,u32 status,__le16 frame_control)1455 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1456 u32 status, __le16 frame_control)
1457 {
1458 struct iwl_fw_dbg_trigger_tlv *trig;
1459 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1460 int i;
1461
1462 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) {
1463 enum iwl_fw_ini_time_point tp =
1464 IWL_FW_INI_TIME_POINT_TX_FAILED;
1465
1466 if (ieee80211_is_action(frame_control))
1467 tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED;
1468
1469 iwl_dbg_tlv_time_point(&mvm->fwrt,
1470 tp, NULL);
1471 return;
1472 }
1473
1474 trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1475 FW_DBG_TRIGGER_TX_STATUS);
1476 if (!trig)
1477 return;
1478
1479 status_trig = (void *)trig->data;
1480
1481 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1482 /* don't collect on status 0 */
1483 if (!status_trig->statuses[i].status)
1484 break;
1485
1486 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1487 continue;
1488
1489 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1490 "Tx status %d was received",
1491 status & TX_STATUS_MSK);
1492 break;
1493 }
1494 }
1495
1496 /*
1497 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1498 * @tx_resp: the Tx response from the fw (agg or non-agg)
1499 *
1500 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1501 * it can't know that everything will go well until the end of the AMPDU, it
1502 * can't know in advance the number of MPDUs that will be sent in the current
1503 * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1504 * Hence, it can't know in advance what the SSN of the SCD will be at the end
1505 * of the batch. This is why the SSN of the SCD is written at the end of the
1506 * whole struct at a variable offset. This function knows how to cope with the
1507 * variable offset and returns the SSN of the SCD.
1508 */
iwl_mvm_get_scd_ssn(struct iwl_mvm * mvm,struct iwl_mvm_tx_resp * tx_resp)1509 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1510 struct iwl_mvm_tx_resp *tx_resp)
1511 {
1512 return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1513 tx_resp->frame_count) & 0xfff;
1514 }
1515
iwl_mvm_rx_tx_cmd_single(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)1516 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1517 struct iwl_rx_packet *pkt)
1518 {
1519 struct ieee80211_sta *sta;
1520 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1521 int txq_id = SEQ_TO_QUEUE(sequence);
1522 /* struct iwl_mvm_tx_resp_v3 is almost the same */
1523 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1524 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1525 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1526 struct agg_tx_status *agg_status =
1527 iwl_mvm_get_agg_status(mvm, tx_resp);
1528 u32 status = le16_to_cpu(agg_status->status);
1529 u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1530 struct sk_buff_head skbs;
1531 u8 skb_freed = 0;
1532 u8 lq_color;
1533 u16 next_reclaimed, seq_ctl;
1534 bool is_ndp = false;
1535
1536 __skb_queue_head_init(&skbs);
1537
1538 if (iwl_mvm_has_new_tx_api(mvm))
1539 txq_id = le16_to_cpu(tx_resp->tx_queue);
1540
1541 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1542
1543 /* we can free until ssn % q.n_bd not inclusive */
1544 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1545
1546 while (!skb_queue_empty(&skbs)) {
1547 struct sk_buff *skb = __skb_dequeue(&skbs);
1548 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1549 struct ieee80211_hdr *hdr = (void *)skb->data;
1550 bool flushed = false;
1551
1552 skb_freed++;
1553
1554 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1555
1556 memset(&info->status, 0, sizeof(info->status));
1557
1558 /* inform mac80211 about what happened with the frame */
1559 switch (status & TX_STATUS_MSK) {
1560 case TX_STATUS_SUCCESS:
1561 case TX_STATUS_DIRECT_DONE:
1562 info->flags |= IEEE80211_TX_STAT_ACK;
1563 break;
1564 case TX_STATUS_FAIL_FIFO_FLUSHED:
1565 case TX_STATUS_FAIL_DRAIN_FLOW:
1566 flushed = true;
1567 break;
1568 case TX_STATUS_FAIL_DEST_PS:
1569 /* the FW should have stopped the queue and not
1570 * return this status
1571 */
1572 IWL_ERR_LIMIT(mvm,
1573 "FW reported TX filtered, status=0x%x, FC=0x%x\n",
1574 status, le16_to_cpu(hdr->frame_control));
1575 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1576 break;
1577 default:
1578 break;
1579 }
1580
1581 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1582 ieee80211_is_mgmt(hdr->frame_control))
1583 iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1584
1585 /*
1586 * If we are freeing multiple frames, mark all the frames
1587 * but the first one as acked, since they were acknowledged
1588 * before
1589 * */
1590 if (skb_freed > 1)
1591 info->flags |= IEEE80211_TX_STAT_ACK;
1592
1593 iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control);
1594
1595 info->status.rates[0].count = tx_resp->failure_frame + 1;
1596
1597 iwl_mvm_hwrate_to_tx_status(mvm->fw,
1598 le32_to_cpu(tx_resp->initial_rate),
1599 info);
1600
1601 /* Don't assign the converted initial_rate, because driver
1602 * TLC uses this and doesn't support the new FW rate
1603 */
1604 info->status.status_driver_data[1] =
1605 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1606
1607 /* Single frame failure in an AMPDU queue => send BAR */
1608 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1609 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1610 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1611 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1612 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1613
1614 /* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1615 if (ieee80211_is_back_req(hdr->frame_control))
1616 seq_ctl = 0;
1617 else if (status != TX_STATUS_SUCCESS)
1618 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1619
1620 if (unlikely(!seq_ctl)) {
1621 /*
1622 * If it is an NDP, we can't update next_reclaim since
1623 * its sequence control is 0. Note that for that same
1624 * reason, NDPs are never sent to A-MPDU'able queues
1625 * so that we can never have more than one freed frame
1626 * for a single Tx resonse (see WARN_ON below).
1627 */
1628 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1629 is_ndp = true;
1630 }
1631
1632 /*
1633 * TODO: this is not accurate if we are freeing more than one
1634 * packet.
1635 */
1636 info->status.tx_time =
1637 le16_to_cpu(tx_resp->wireless_media_time);
1638 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1639 lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1640 info->status.status_driver_data[0] =
1641 RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1642
1643 ieee80211_tx_status(mvm->hw, skb);
1644 }
1645
1646 /* This is an aggregation queue or might become one, so we use
1647 * the ssn since: ssn = wifi seq_num % 256.
1648 * The seq_ctl is the sequence control of the packet to which
1649 * this Tx response relates. But if there is a hole in the
1650 * bitmap of the BA we received, this Tx response may allow to
1651 * reclaim the hole and all the subsequent packets that were
1652 * already acked. In that case, seq_ctl != ssn, and the next
1653 * packet to be reclaimed will be ssn and not seq_ctl. In that
1654 * case, several packets will be reclaimed even if
1655 * frame_count = 1.
1656 *
1657 * The ssn is the index (% 256) of the latest packet that has
1658 * treated (acked / dropped) + 1.
1659 */
1660 next_reclaimed = ssn;
1661
1662 IWL_DEBUG_TX_REPLY(mvm,
1663 "TXQ %d status %s (0x%08x)\n",
1664 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1665
1666 IWL_DEBUG_TX_REPLY(mvm,
1667 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1668 le32_to_cpu(tx_resp->initial_rate),
1669 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1670 ssn, next_reclaimed, seq_ctl);
1671
1672 rcu_read_lock();
1673
1674 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1675 /*
1676 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1677 * the firmware while we still have packets for it in the Tx queues.
1678 */
1679 if (WARN_ON_ONCE(!sta))
1680 goto out;
1681
1682 if (!IS_ERR(sta)) {
1683 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1684
1685 iwl_mvm_tx_airtime(mvm, mvmsta,
1686 le16_to_cpu(tx_resp->wireless_media_time));
1687
1688 if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1689 mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1690 iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1691
1692 if (sta->wme && tid != IWL_MGMT_TID) {
1693 struct iwl_mvm_tid_data *tid_data =
1694 &mvmsta->tid_data[tid];
1695 bool send_eosp_ndp = false;
1696
1697 spin_lock_bh(&mvmsta->lock);
1698
1699 if (!is_ndp) {
1700 tid_data->next_reclaimed = next_reclaimed;
1701 IWL_DEBUG_TX_REPLY(mvm,
1702 "Next reclaimed packet:%d\n",
1703 next_reclaimed);
1704 } else {
1705 IWL_DEBUG_TX_REPLY(mvm,
1706 "NDP - don't update next_reclaimed\n");
1707 }
1708
1709 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1710
1711 if (mvmsta->sleep_tx_count) {
1712 mvmsta->sleep_tx_count--;
1713 if (mvmsta->sleep_tx_count &&
1714 !iwl_mvm_tid_queued(mvm, tid_data)) {
1715 /*
1716 * The number of frames in the queue
1717 * dropped to 0 even if we sent less
1718 * frames than we thought we had on the
1719 * Tx queue.
1720 * This means we had holes in the BA
1721 * window that we just filled, ask
1722 * mac80211 to send EOSP since the
1723 * firmware won't know how to do that.
1724 * Send NDP and the firmware will send
1725 * EOSP notification that will trigger
1726 * a call to ieee80211_sta_eosp().
1727 */
1728 send_eosp_ndp = true;
1729 }
1730 }
1731
1732 spin_unlock_bh(&mvmsta->lock);
1733 if (send_eosp_ndp) {
1734 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1735 IEEE80211_FRAME_RELEASE_UAPSD,
1736 1, tid, false, false);
1737 mvmsta->sleep_tx_count = 0;
1738 ieee80211_send_eosp_nullfunc(sta, tid);
1739 }
1740 }
1741
1742 if (mvmsta->next_status_eosp) {
1743 mvmsta->next_status_eosp = false;
1744 ieee80211_sta_eosp(sta);
1745 }
1746 }
1747 out:
1748 rcu_read_unlock();
1749 }
1750
1751 #ifdef CONFIG_IWLWIFI_DEBUG
1752 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
iwl_get_agg_tx_status(u16 status)1753 static const char *iwl_get_agg_tx_status(u16 status)
1754 {
1755 switch (status & AGG_TX_STATE_STATUS_MSK) {
1756 AGG_TX_STATE_(TRANSMITTED);
1757 AGG_TX_STATE_(UNDERRUN);
1758 AGG_TX_STATE_(BT_PRIO);
1759 AGG_TX_STATE_(FEW_BYTES);
1760 AGG_TX_STATE_(ABORT);
1761 AGG_TX_STATE_(TX_ON_AIR_DROP);
1762 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1763 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1764 AGG_TX_STATE_(SCD_QUERY);
1765 AGG_TX_STATE_(TEST_BAD_CRC32);
1766 AGG_TX_STATE_(RESPONSE);
1767 AGG_TX_STATE_(DUMP_TX);
1768 AGG_TX_STATE_(DELAY_TX);
1769 }
1770
1771 return "UNKNOWN";
1772 }
1773
iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)1774 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1775 struct iwl_rx_packet *pkt)
1776 {
1777 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1778 struct agg_tx_status *frame_status =
1779 iwl_mvm_get_agg_status(mvm, tx_resp);
1780 int i;
1781 bool tirgger_timepoint = false;
1782
1783 for (i = 0; i < tx_resp->frame_count; i++) {
1784 u16 fstatus = le16_to_cpu(frame_status[i].status);
1785 /* In case one frame wasn't transmitted trigger time point */
1786 tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) !=
1787 AGG_TX_STATE_TRANSMITTED);
1788 IWL_DEBUG_TX_REPLY(mvm,
1789 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1790 iwl_get_agg_tx_status(fstatus),
1791 fstatus & AGG_TX_STATE_STATUS_MSK,
1792 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1793 AGG_TX_STATE_TRY_CNT_POS,
1794 le16_to_cpu(frame_status[i].sequence));
1795 }
1796
1797 if (tirgger_timepoint)
1798 iwl_dbg_tlv_time_point(&mvm->fwrt,
1799 IWL_FW_INI_TIME_POINT_TX_FAILED, NULL);
1800
1801 }
1802 #else
iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)1803 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1804 struct iwl_rx_packet *pkt)
1805 {}
1806 #endif /* CONFIG_IWLWIFI_DEBUG */
1807
iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)1808 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1809 struct iwl_rx_packet *pkt)
1810 {
1811 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1812 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1813 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1814 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1815 struct iwl_mvm_sta *mvmsta;
1816 int queue = SEQ_TO_QUEUE(sequence);
1817 struct ieee80211_sta *sta;
1818
1819 if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1820 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1821 return;
1822
1823 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1824
1825 rcu_read_lock();
1826
1827 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1828
1829 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1830 if (WARN_ON_ONCE(!sta || !sta->wme)) {
1831 rcu_read_unlock();
1832 return;
1833 }
1834
1835 if (!WARN_ON_ONCE(!mvmsta)) {
1836 mvmsta->tid_data[tid].rate_n_flags =
1837 le32_to_cpu(tx_resp->initial_rate);
1838 mvmsta->tid_data[tid].tx_time =
1839 le16_to_cpu(tx_resp->wireless_media_time);
1840 mvmsta->tid_data[tid].lq_color =
1841 TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1842 iwl_mvm_tx_airtime(mvm, mvmsta,
1843 le16_to_cpu(tx_resp->wireless_media_time));
1844 }
1845
1846 rcu_read_unlock();
1847 }
1848
iwl_mvm_rx_tx_cmd(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1849 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1850 {
1851 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1852 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1853
1854 if (tx_resp->frame_count == 1)
1855 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1856 else
1857 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1858 }
1859
iwl_mvm_tx_reclaim(struct iwl_mvm * mvm,int sta_id,int tid,int txq,int index,struct ieee80211_tx_info * tx_info,u32 rate,bool is_flush)1860 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1861 int txq, int index,
1862 struct ieee80211_tx_info *tx_info, u32 rate,
1863 bool is_flush)
1864 {
1865 struct sk_buff_head reclaimed_skbs;
1866 struct iwl_mvm_tid_data *tid_data = NULL;
1867 struct ieee80211_sta *sta;
1868 struct iwl_mvm_sta *mvmsta = NULL;
1869 struct sk_buff *skb;
1870 int freed;
1871
1872 if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations ||
1873 tid > IWL_MAX_TID_COUNT,
1874 "sta_id %d tid %d", sta_id, tid))
1875 return;
1876
1877 rcu_read_lock();
1878
1879 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1880
1881 /* Reclaiming frames for a station that has been deleted ? */
1882 if (WARN_ON_ONCE(!sta)) {
1883 rcu_read_unlock();
1884 return;
1885 }
1886
1887 __skb_queue_head_init(&reclaimed_skbs);
1888
1889 /*
1890 * Release all TFDs before the SSN, i.e. all TFDs in front of
1891 * block-ack window (we assume that they've been successfully
1892 * transmitted ... if not, it's too late anyway).
1893 */
1894 iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1895
1896 skb_queue_walk(&reclaimed_skbs, skb) {
1897 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1898
1899 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1900
1901 memset(&info->status, 0, sizeof(info->status));
1902 /* Packet was transmitted successfully, failures come as single
1903 * frames because before failing a frame the firmware transmits
1904 * it without aggregation at least once.
1905 */
1906 if (!is_flush)
1907 info->flags |= IEEE80211_TX_STAT_ACK;
1908 }
1909
1910 /*
1911 * It's possible to get a BA response after invalidating the rcu (rcu is
1912 * invalidated in order to prevent new Tx from being sent, but there may
1913 * be some frames already in-flight).
1914 * In this case we just want to reclaim, and could skip all the
1915 * sta-dependent stuff since it's in the middle of being removed
1916 * anyways.
1917 */
1918 if (IS_ERR(sta))
1919 goto out;
1920
1921 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1922 tid_data = &mvmsta->tid_data[tid];
1923
1924 if (tid_data->txq_id != txq) {
1925 IWL_ERR(mvm,
1926 "invalid reclaim request: Q %d, tid %d\n",
1927 tid_data->txq_id, tid);
1928 rcu_read_unlock();
1929 return;
1930 }
1931
1932 spin_lock_bh(&mvmsta->lock);
1933
1934 tid_data->next_reclaimed = index;
1935
1936 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1937
1938 freed = 0;
1939
1940 /* pack lq color from tid_data along the reduced txp */
1941 tx_info->status.status_driver_data[0] =
1942 RS_DRV_DATA_PACK(tid_data->lq_color,
1943 tx_info->status.status_driver_data[0]);
1944 tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1945
1946 skb_queue_walk(&reclaimed_skbs, skb) {
1947 struct ieee80211_hdr *hdr = (void *)skb->data;
1948 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1949
1950 if (!is_flush) {
1951 if (ieee80211_is_data_qos(hdr->frame_control))
1952 freed++;
1953 else
1954 WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
1955 }
1956
1957 /* this is the first skb we deliver in this batch */
1958 /* put the rate scaling data there */
1959 if (freed == 1) {
1960 info->flags |= IEEE80211_TX_STAT_AMPDU;
1961 memcpy(&info->status, &tx_info->status,
1962 sizeof(tx_info->status));
1963 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info);
1964 }
1965 }
1966
1967 spin_unlock_bh(&mvmsta->lock);
1968
1969 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1970 * possible (i.e. first MPDU in the aggregation wasn't acked)
1971 * Still it's important to update RS about sent vs. acked.
1972 */
1973 if (!is_flush && skb_queue_empty(&reclaimed_skbs)) {
1974 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1975
1976 if (mvmsta->vif)
1977 chanctx_conf =
1978 rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf);
1979
1980 if (WARN_ON_ONCE(!chanctx_conf))
1981 goto out;
1982
1983 tx_info->band = chanctx_conf->def.chan->band;
1984 iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info);
1985
1986 if (!iwl_mvm_has_tlc_offload(mvm)) {
1987 IWL_DEBUG_TX_REPLY(mvm,
1988 "No reclaim. Update rs directly\n");
1989 iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false);
1990 }
1991 }
1992
1993 out:
1994 rcu_read_unlock();
1995
1996 while (!skb_queue_empty(&reclaimed_skbs)) {
1997 skb = __skb_dequeue(&reclaimed_skbs);
1998 ieee80211_tx_status(mvm->hw, skb);
1999 }
2000 }
2001
iwl_mvm_rx_ba_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)2002 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
2003 {
2004 struct iwl_rx_packet *pkt = rxb_addr(rxb);
2005 unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
2006 int sta_id, tid, txq, index;
2007 struct ieee80211_tx_info ba_info = {};
2008 struct iwl_mvm_ba_notif *ba_notif;
2009 struct iwl_mvm_tid_data *tid_data;
2010 struct iwl_mvm_sta *mvmsta;
2011
2012 ba_info.flags = IEEE80211_TX_STAT_AMPDU;
2013
2014 if (iwl_mvm_has_new_tx_api(mvm)) {
2015 struct iwl_mvm_compressed_ba_notif *ba_res =
2016 (void *)pkt->data;
2017 u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
2018 u16 tfd_cnt;
2019 int i;
2020
2021 if (unlikely(sizeof(*ba_res) > pkt_len))
2022 return;
2023
2024 sta_id = ba_res->sta_id;
2025 ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
2026 ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
2027 ba_info.status.tx_time =
2028 (u16)le32_to_cpu(ba_res->wireless_time);
2029 ba_info.status.status_driver_data[0] =
2030 (void *)(uintptr_t)ba_res->reduced_txp;
2031
2032 tfd_cnt = le16_to_cpu(ba_res->tfd_cnt);
2033 if (!tfd_cnt || struct_size(ba_res, tfd, tfd_cnt) > pkt_len)
2034 return;
2035
2036 rcu_read_lock();
2037
2038 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2039 /*
2040 * It's possible to get a BA response after invalidating the rcu
2041 * (rcu is invalidated in order to prevent new Tx from being
2042 * sent, but there may be some frames already in-flight).
2043 * In this case we just want to reclaim, and could skip all the
2044 * sta-dependent stuff since it's in the middle of being removed
2045 * anyways.
2046 */
2047
2048 /* Free per TID */
2049 for (i = 0; i < tfd_cnt; i++) {
2050 struct iwl_mvm_compressed_ba_tfd *ba_tfd =
2051 &ba_res->tfd[i];
2052
2053 tid = ba_tfd->tid;
2054 if (tid == IWL_MGMT_TID)
2055 tid = IWL_MAX_TID_COUNT;
2056
2057 if (mvmsta)
2058 mvmsta->tid_data[i].lq_color = lq_color;
2059
2060 iwl_mvm_tx_reclaim(mvm, sta_id, tid,
2061 (int)(le16_to_cpu(ba_tfd->q_num)),
2062 le16_to_cpu(ba_tfd->tfd_index),
2063 &ba_info,
2064 le32_to_cpu(ba_res->tx_rate), false);
2065 }
2066
2067 if (mvmsta)
2068 iwl_mvm_tx_airtime(mvm, mvmsta,
2069 le32_to_cpu(ba_res->wireless_time));
2070 rcu_read_unlock();
2071
2072 IWL_DEBUG_TX_REPLY(mvm,
2073 "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
2074 sta_id, le32_to_cpu(ba_res->flags),
2075 le16_to_cpu(ba_res->txed),
2076 le16_to_cpu(ba_res->done));
2077 return;
2078 }
2079
2080 ba_notif = (void *)pkt->data;
2081 sta_id = ba_notif->sta_id;
2082 tid = ba_notif->tid;
2083 /* "flow" corresponds to Tx queue */
2084 txq = le16_to_cpu(ba_notif->scd_flow);
2085 /* "ssn" is start of block-ack Tx window, corresponds to index
2086 * (in Tx queue's circular buffer) of first TFD/frame in window */
2087 index = le16_to_cpu(ba_notif->scd_ssn);
2088
2089 rcu_read_lock();
2090 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2091 if (WARN_ON_ONCE(!mvmsta)) {
2092 rcu_read_unlock();
2093 return;
2094 }
2095
2096 tid_data = &mvmsta->tid_data[tid];
2097
2098 ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
2099 ba_info.status.ampdu_len = ba_notif->txed;
2100 ba_info.status.tx_time = tid_data->tx_time;
2101 ba_info.status.status_driver_data[0] =
2102 (void *)(uintptr_t)ba_notif->reduced_txp;
2103
2104 rcu_read_unlock();
2105
2106 iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
2107 tid_data->rate_n_flags, false);
2108
2109 IWL_DEBUG_TX_REPLY(mvm,
2110 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
2111 ba_notif->sta_addr, ba_notif->sta_id);
2112
2113 IWL_DEBUG_TX_REPLY(mvm,
2114 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
2115 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
2116 le64_to_cpu(ba_notif->bitmap), txq, index,
2117 ba_notif->txed, ba_notif->txed_2_done);
2118
2119 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
2120 ba_notif->reduced_txp);
2121 }
2122
2123 /*
2124 * Note that there are transports that buffer frames before they reach
2125 * the firmware. This means that after flush_tx_path is called, the
2126 * queue might not be empty. The race-free way to handle this is to:
2127 * 1) set the station as draining
2128 * 2) flush the Tx path
2129 * 3) wait for the transport queues to be empty
2130 */
iwl_mvm_flush_tx_path(struct iwl_mvm * mvm,u32 tfd_msk)2131 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk)
2132 {
2133 int ret;
2134 struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2135 .queues_ctl = cpu_to_le32(tfd_msk),
2136 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2137 };
2138
2139 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2140 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0,
2141 sizeof(flush_cmd), &flush_cmd);
2142 if (ret)
2143 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2144 return ret;
2145 }
2146
iwl_mvm_flush_sta_tids(struct iwl_mvm * mvm,u32 sta_id,u16 tids)2147 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids)
2148 {
2149 int ret;
2150 struct iwl_tx_path_flush_cmd_rsp *rsp;
2151 struct iwl_tx_path_flush_cmd flush_cmd = {
2152 .sta_id = cpu_to_le32(sta_id),
2153 .tid_mask = cpu_to_le16(tids),
2154 };
2155
2156 struct iwl_host_cmd cmd = {
2157 .id = TXPATH_FLUSH,
2158 .len = { sizeof(flush_cmd), },
2159 .data = { &flush_cmd, },
2160 };
2161
2162 WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2163
2164 if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0)
2165 cmd.flags |= CMD_WANT_SKB;
2166
2167 IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n",
2168 sta_id, tids);
2169
2170 ret = iwl_mvm_send_cmd(mvm, &cmd);
2171
2172 if (ret) {
2173 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2174 return ret;
2175 }
2176
2177 if (cmd.flags & CMD_WANT_SKB) {
2178 int i;
2179 int num_flushed_queues;
2180
2181 if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) {
2182 ret = -EIO;
2183 goto free_rsp;
2184 }
2185
2186 rsp = (void *)cmd.resp_pkt->data;
2187
2188 if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id,
2189 "sta_id %d != rsp_sta_id %d",
2190 sta_id, le16_to_cpu(rsp->sta_id))) {
2191 ret = -EIO;
2192 goto free_rsp;
2193 }
2194
2195 num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues);
2196 if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP,
2197 "num_flushed_queues %d", num_flushed_queues)) {
2198 ret = -EIO;
2199 goto free_rsp;
2200 }
2201
2202 for (i = 0; i < num_flushed_queues; i++) {
2203 struct ieee80211_tx_info tx_info = {};
2204 struct iwl_flush_queue_info *queue_info = &rsp->queues[i];
2205 int tid = le16_to_cpu(queue_info->tid);
2206 int read_before = le16_to_cpu(queue_info->read_before_flush);
2207 int read_after = le16_to_cpu(queue_info->read_after_flush);
2208 int queue_num = le16_to_cpu(queue_info->queue_num);
2209
2210 if (tid == IWL_MGMT_TID)
2211 tid = IWL_MAX_TID_COUNT;
2212
2213 IWL_DEBUG_TX_QUEUES(mvm,
2214 "tid %d queue_id %d read-before %d read-after %d\n",
2215 tid, queue_num, read_before, read_after);
2216
2217 iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after,
2218 &tx_info, 0, true);
2219 }
2220 free_rsp:
2221 iwl_free_resp(&cmd);
2222 }
2223 return ret;
2224 }
2225
iwl_mvm_flush_sta(struct iwl_mvm * mvm,void * sta,bool internal)2226 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal)
2227 {
2228 struct iwl_mvm_int_sta *int_sta = sta;
2229 struct iwl_mvm_sta *mvm_sta = sta;
2230
2231 BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) !=
2232 offsetof(struct iwl_mvm_sta, sta_id));
2233
2234 if (iwl_mvm_has_new_tx_api(mvm))
2235 return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 0xffff);
2236
2237 if (internal)
2238 return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk);
2239
2240 return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk);
2241 }
2242