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8ca151b5 JB |
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 | * | |
51368bf7 | 8 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
8ca151b5 JB |
9 | * |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of version 2 of the GNU General Public License as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
22 | * USA | |
23 | * | |
24 | * The full GNU General Public License is included in this distribution | |
410dc5aa | 25 | * in the file called COPYING. |
8ca151b5 JB |
26 | * |
27 | * Contact Information: | |
28 | * Intel Linux Wireless <ilw@linux.intel.com> | |
29 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
30 | * | |
31 | * BSD LICENSE | |
32 | * | |
51368bf7 | 33 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
8ca151b5 JB |
34 | * All rights reserved. |
35 | * | |
36 | * Redistribution and use in source and binary forms, with or without | |
37 | * modification, are permitted provided that the following conditions | |
38 | * are met: | |
39 | * | |
40 | * * Redistributions of source code must retain the above copyright | |
41 | * notice, this list of conditions and the following disclaimer. | |
42 | * * Redistributions in binary form must reproduce the above copyright | |
43 | * notice, this list of conditions and the following disclaimer in | |
44 | * the documentation and/or other materials provided with the | |
45 | * distribution. | |
46 | * * Neither the name Intel Corporation nor the names of its | |
47 | * contributors may be used to endorse or promote products derived | |
48 | * from this software without specific prior written permission. | |
49 | * | |
50 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
51 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
52 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
53 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
54 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
55 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
56 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
57 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
58 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
59 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
60 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
61 | * | |
62 | *****************************************************************************/ | |
63 | #include <linux/ieee80211.h> | |
64 | #include <linux/etherdevice.h> | |
65 | ||
66 | #include "iwl-trans.h" | |
67 | #include "iwl-eeprom-parse.h" | |
68 | #include "mvm.h" | |
69 | #include "sta.h" | |
70 | ||
71 | /* | |
72 | * Sets most of the Tx cmd's fields | |
73 | */ | |
74 | static void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, | |
75 | struct iwl_tx_cmd *tx_cmd, | |
76 | struct ieee80211_tx_info *info, u8 sta_id) | |
77 | { | |
78 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
79 | __le16 fc = hdr->frame_control; | |
80 | u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); | |
81 | u32 len = skb->len + FCS_LEN; | |
b797e3fb | 82 | u8 ac; |
8ca151b5 JB |
83 | |
84 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
85 | tx_flags |= TX_CMD_FLG_ACK; | |
86 | else | |
87 | tx_flags &= ~TX_CMD_FLG_ACK; | |
88 | ||
89 | if (ieee80211_is_probe_resp(fc)) | |
90 | tx_flags |= TX_CMD_FLG_TSF; | |
91 | else if (ieee80211_is_back_req(fc)) | |
92 | tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; | |
93 | ||
8ca151b5 JB |
94 | if (ieee80211_has_morefrags(fc)) |
95 | tx_flags |= TX_CMD_FLG_MORE_FRAG; | |
96 | ||
97 | if (ieee80211_is_data_qos(fc)) { | |
98 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
99 | tx_cmd->tid_tspec = qc[0] & 0xf; | |
100 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL; | |
101 | } else { | |
102 | tx_cmd->tid_tspec = IWL_TID_NON_QOS; | |
103 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) | |
104 | tx_flags |= TX_CMD_FLG_SEQ_CTL; | |
105 | else | |
106 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL; | |
107 | } | |
108 | ||
b797e3fb EG |
109 | /* tid_tspec will default to 0 = BE when QOS isn't enabled */ |
110 | ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; | |
111 | tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << | |
112 | TX_CMD_FLG_BT_PRIO_POS; | |
113 | ||
8ca151b5 JB |
114 | if (ieee80211_is_mgmt(fc)) { |
115 | if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) | |
116 | tx_cmd->pm_frame_timeout = cpu_to_le16(3); | |
117 | else | |
118 | tx_cmd->pm_frame_timeout = cpu_to_le16(2); | |
119 | ||
120 | /* The spec allows Action frames in A-MPDU, we don't support | |
121 | * it | |
122 | */ | |
123 | WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); | |
63f7535d | 124 | } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { |
0f2ed58e | 125 | tx_cmd->pm_frame_timeout = cpu_to_le16(2); |
8ca151b5 JB |
126 | } else { |
127 | tx_cmd->pm_frame_timeout = 0; | |
128 | } | |
129 | ||
8ca151b5 JB |
130 | if (ieee80211_is_data(fc) && len > mvm->rts_threshold && |
131 | !is_multicast_ether_addr(ieee80211_get_DA(hdr))) | |
132 | tx_flags |= TX_CMD_FLG_PROT_REQUIRE; | |
133 | ||
8ca151b5 JB |
134 | tx_cmd->tx_flags = cpu_to_le32(tx_flags); |
135 | /* Total # bytes to be transmitted */ | |
136 | tx_cmd->len = cpu_to_le16((u16)skb->len); | |
137 | tx_cmd->next_frame_len = 0; | |
138 | tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); | |
139 | tx_cmd->sta_id = sta_id; | |
140 | } | |
141 | ||
142 | /* | |
143 | * Sets the fields in the Tx cmd that are rate related | |
144 | */ | |
145 | static void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, | |
146 | struct iwl_tx_cmd *tx_cmd, | |
147 | struct ieee80211_tx_info *info, | |
148 | struct ieee80211_sta *sta, | |
149 | __le16 fc) | |
150 | { | |
151 | u32 rate_flags; | |
152 | int rate_idx; | |
153 | u8 rate_plcp; | |
154 | ||
155 | /* Set retry limit on RTS packets */ | |
156 | tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; | |
157 | ||
158 | /* Set retry limit on DATA packets and Probe Responses*/ | |
159 | if (ieee80211_is_probe_resp(fc)) { | |
160 | tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; | |
161 | tx_cmd->rts_retry_limit = | |
162 | min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); | |
163 | } else if (ieee80211_is_back_req(fc)) { | |
164 | tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; | |
165 | } else { | |
166 | tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; | |
167 | } | |
168 | ||
169 | /* | |
e89044d7 | 170 | * for data packets, rate info comes from the table inside the fw. This |
8ca151b5 JB |
171 | * table is controlled by LINK_QUALITY commands |
172 | */ | |
173 | ||
9116a368 | 174 | if (ieee80211_is_data(fc) && sta) { |
8ca151b5 JB |
175 | tx_cmd->initial_rate_index = 0; |
176 | tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); | |
177 | return; | |
178 | } else if (ieee80211_is_back_req(fc)) { | |
2edc6ec6 EG |
179 | tx_cmd->tx_flags |= |
180 | cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); | |
8ca151b5 JB |
181 | } |
182 | ||
183 | /* HT rate doesn't make sense for a non data frame */ | |
184 | WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, | |
185 | "Got an HT rate for a non data frame 0x%x\n", | |
186 | info->control.rates[0].flags); | |
187 | ||
188 | rate_idx = info->control.rates[0].idx; | |
189 | /* if the rate isn't a well known legacy rate, take the lowest one */ | |
190 | if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY) | |
191 | rate_idx = rate_lowest_index( | |
192 | &mvm->nvm_data->bands[info->band], sta); | |
193 | ||
194 | /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ | |
195 | if (info->band == IEEE80211_BAND_5GHZ) | |
196 | rate_idx += IWL_FIRST_OFDM_RATE; | |
197 | ||
198 | /* For 2.4 GHZ band, check that there is no need to remap */ | |
199 | BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); | |
200 | ||
201 | /* Get PLCP rate for tx_cmd->rate_n_flags */ | |
202 | rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); | |
203 | ||
204 | mvm->mgmt_last_antenna_idx = | |
4ed735e7 | 205 | iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant, |
8ca151b5 | 206 | mvm->mgmt_last_antenna_idx); |
34c8b24f EG |
207 | |
208 | if (info->band == IEEE80211_BAND_2GHZ && | |
209 | !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) | |
210 | rate_flags = BIT(ANT_A) << RATE_MCS_ANT_POS; | |
211 | else | |
212 | rate_flags = | |
213 | BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; | |
8ca151b5 JB |
214 | |
215 | /* Set CCK flag as needed */ | |
216 | if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) | |
217 | rate_flags |= RATE_MCS_CCK_MSK; | |
218 | ||
219 | /* Set the rate in the TX cmd */ | |
220 | tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags); | |
221 | } | |
222 | ||
223 | /* | |
224 | * Sets the fields in the Tx cmd that are crypto related | |
225 | */ | |
226 | static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, | |
227 | struct ieee80211_tx_info *info, | |
228 | struct iwl_tx_cmd *tx_cmd, | |
229 | struct sk_buff *skb_frag) | |
230 | { | |
231 | struct ieee80211_key_conf *keyconf = info->control.hw_key; | |
232 | ||
233 | switch (keyconf->cipher) { | |
234 | case WLAN_CIPHER_SUITE_CCMP: | |
235 | tx_cmd->sec_ctl = TX_CMD_SEC_CCM; | |
236 | memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); | |
237 | if (info->flags & IEEE80211_TX_CTL_AMPDU) | |
238 | tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_CCMP_AGG); | |
239 | break; | |
240 | ||
241 | case WLAN_CIPHER_SUITE_TKIP: | |
242 | tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; | |
243 | ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); | |
244 | break; | |
245 | ||
246 | case WLAN_CIPHER_SUITE_WEP104: | |
247 | tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; | |
248 | /* fall through */ | |
249 | case WLAN_CIPHER_SUITE_WEP40: | |
250 | tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | | |
251 | ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & | |
252 | TX_CMD_SEC_WEP_KEY_IDX_MSK); | |
253 | ||
254 | memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); | |
255 | break; | |
256 | default: | |
e36e5433 | 257 | tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; |
8ca151b5 JB |
258 | } |
259 | } | |
260 | ||
261 | /* | |
262 | * Allocates and sets the Tx cmd the driver data pointers in the skb | |
263 | */ | |
264 | static struct iwl_device_cmd * | |
265 | iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, | |
266 | struct ieee80211_sta *sta, u8 sta_id) | |
267 | { | |
268 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
269 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
270 | struct iwl_device_cmd *dev_cmd; | |
271 | struct iwl_tx_cmd *tx_cmd; | |
272 | ||
273 | dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); | |
274 | ||
275 | if (unlikely(!dev_cmd)) | |
276 | return NULL; | |
277 | ||
278 | memset(dev_cmd, 0, sizeof(*dev_cmd)); | |
3961a61a | 279 | dev_cmd->hdr.cmd = TX_CMD; |
8ca151b5 JB |
280 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; |
281 | ||
282 | if (info->control.hw_key) | |
283 | iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb); | |
284 | ||
285 | iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); | |
286 | ||
287 | iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); | |
288 | ||
289 | memset(&info->status, 0, sizeof(info->status)); | |
290 | ||
291 | info->driver_data[0] = NULL; | |
292 | info->driver_data[1] = dev_cmd; | |
293 | ||
294 | return dev_cmd; | |
295 | } | |
296 | ||
297 | int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) | |
298 | { | |
299 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
300 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
301 | struct iwl_device_cmd *dev_cmd; | |
302 | struct iwl_tx_cmd *tx_cmd; | |
303 | u8 sta_id; | |
304 | ||
305 | if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU)) | |
306 | return -1; | |
307 | ||
308 | if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && | |
309 | (!info->control.vif || | |
310 | info->hw_queue != info->control.vif->cab_queue))) | |
311 | return -1; | |
312 | ||
313 | /* | |
314 | * If the interface on which frame is sent is the P2P_DEVICE | |
315 | * or an AP/GO interface use the broadcast station associated | |
316 | * with it; otherwise use the AUX station. | |
317 | */ | |
318 | if (info->control.vif && | |
319 | (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE || | |
320 | info->control.vif->type == NL80211_IFTYPE_AP)) { | |
321 | struct iwl_mvm_vif *mvmvif = | |
322 | iwl_mvm_vif_from_mac80211(info->control.vif); | |
323 | sta_id = mvmvif->bcast_sta.sta_id; | |
324 | } else { | |
325 | sta_id = mvm->aux_sta.sta_id; | |
326 | } | |
327 | ||
328 | IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue); | |
329 | ||
330 | dev_cmd = iwl_mvm_set_tx_params(mvm, skb, NULL, sta_id); | |
331 | if (!dev_cmd) | |
332 | return -1; | |
333 | ||
334 | /* From now on, we cannot access info->control */ | |
335 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; | |
336 | ||
337 | /* Copy MAC header from skb into command buffer */ | |
338 | memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(hdr->frame_control)); | |
339 | ||
340 | if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) { | |
341 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); | |
342 | return -1; | |
343 | } | |
344 | ||
345 | return 0; | |
346 | } | |
347 | ||
348 | /* | |
349 | * Sets the fields in the Tx cmd that are crypto related | |
350 | */ | |
351 | int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, | |
352 | struct ieee80211_sta *sta) | |
353 | { | |
354 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
355 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
356 | struct iwl_mvm_sta *mvmsta; | |
357 | struct iwl_device_cmd *dev_cmd; | |
358 | struct iwl_tx_cmd *tx_cmd; | |
359 | __le16 fc; | |
360 | u16 seq_number = 0; | |
361 | u8 tid = IWL_MAX_TID_COUNT; | |
362 | u8 txq_id = info->hw_queue; | |
363 | bool is_data_qos = false, is_ampdu = false; | |
364 | ||
5b577a90 | 365 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
366 | fc = hdr->frame_control; |
367 | ||
368 | if (WARN_ON_ONCE(!mvmsta)) | |
369 | return -1; | |
370 | ||
881acd89 | 371 | if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) |
8ca151b5 JB |
372 | return -1; |
373 | ||
374 | dev_cmd = iwl_mvm_set_tx_params(mvm, skb, sta, mvmsta->sta_id); | |
375 | if (!dev_cmd) | |
376 | goto drop; | |
377 | ||
378 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; | |
379 | /* From now on, we cannot access info->control */ | |
380 | ||
3e56eadf JB |
381 | /* |
382 | * we handle that entirely ourselves -- for uAPSD the firmware | |
383 | * will always send a notification, and for PS-Poll responses | |
384 | * we'll notify mac80211 when getting frame status | |
385 | */ | |
386 | info->flags &= ~IEEE80211_TX_STATUS_EOSP; | |
387 | ||
8ca151b5 JB |
388 | spin_lock(&mvmsta->lock); |
389 | ||
390 | if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { | |
391 | u8 *qc = NULL; | |
392 | qc = ieee80211_get_qos_ctl(hdr); | |
393 | tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; | |
394 | if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) | |
395 | goto drop_unlock_sta; | |
396 | ||
397 | seq_number = mvmsta->tid_data[tid].seq_number; | |
398 | seq_number &= IEEE80211_SCTL_SEQ; | |
399 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); | |
400 | hdr->seq_ctrl |= cpu_to_le16(seq_number); | |
8ca151b5 JB |
401 | is_data_qos = true; |
402 | is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; | |
403 | } | |
404 | ||
405 | /* Copy MAC header from skb into command buffer */ | |
406 | memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(fc)); | |
407 | ||
408 | WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); | |
409 | ||
410 | if (is_ampdu) { | |
411 | if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON)) | |
412 | goto drop_unlock_sta; | |
413 | txq_id = mvmsta->tid_data[tid].txq_id; | |
414 | } | |
415 | ||
416 | IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, | |
cf9d1188 | 417 | tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); |
8ca151b5 | 418 | |
8ca151b5 JB |
419 | if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) |
420 | goto drop_unlock_sta; | |
421 | ||
422 | if (is_data_qos && !ieee80211_has_morefrags(fc)) | |
cf9d1188 | 423 | mvmsta->tid_data[tid].seq_number = seq_number + 0x10; |
8ca151b5 JB |
424 | |
425 | spin_unlock(&mvmsta->lock); | |
426 | ||
19e737c9 | 427 | if (txq_id < mvm->first_agg_queue) |
e3d4bc8c | 428 | atomic_inc(&mvm->pending_frames[mvmsta->sta_id]); |
8ca151b5 JB |
429 | |
430 | return 0; | |
431 | ||
432 | drop_unlock_sta: | |
433 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); | |
434 | spin_unlock(&mvmsta->lock); | |
435 | drop: | |
436 | return -1; | |
437 | } | |
438 | ||
439 | static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, | |
440 | struct ieee80211_sta *sta, u8 tid) | |
441 | { | |
5b577a90 | 442 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
443 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; |
444 | struct ieee80211_vif *vif = mvmsta->vif; | |
445 | ||
446 | lockdep_assert_held(&mvmsta->lock); | |
447 | ||
3e56eadf JB |
448 | if ((tid_data->state == IWL_AGG_ON || |
449 | tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && | |
450 | iwl_mvm_tid_queued(tid_data) == 0) { | |
451 | /* | |
452 | * Now that this aggregation queue is empty tell mac80211 so it | |
453 | * knows we no longer have frames buffered for the station on | |
454 | * this TID (for the TIM bitmap calculation.) | |
455 | */ | |
456 | ieee80211_sta_set_buffered(sta, tid, false); | |
457 | } | |
458 | ||
8ca151b5 JB |
459 | if (tid_data->ssn != tid_data->next_reclaimed) |
460 | return; | |
461 | ||
462 | switch (tid_data->state) { | |
463 | case IWL_EMPTYING_HW_QUEUE_ADDBA: | |
464 | IWL_DEBUG_TX_QUEUES(mvm, | |
465 | "Can continue addBA flow ssn = next_recl = %d\n", | |
466 | tid_data->next_reclaimed); | |
467 | tid_data->state = IWL_AGG_STARTING; | |
468 | ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
469 | break; | |
470 | ||
471 | case IWL_EMPTYING_HW_QUEUE_DELBA: | |
472 | IWL_DEBUG_TX_QUEUES(mvm, | |
473 | "Can continue DELBA flow ssn = next_recl = %d\n", | |
474 | tid_data->next_reclaimed); | |
475 | iwl_trans_txq_disable(mvm->trans, tid_data->txq_id); | |
476 | tid_data->state = IWL_AGG_OFF; | |
477 | /* | |
478 | * we can't hold the mutex - but since we are after a sequence | |
479 | * point (call to iwl_trans_txq_disable), so we don't even need | |
480 | * a memory barrier. | |
481 | */ | |
482 | mvm->queue_to_mac80211[tid_data->txq_id] = | |
483 | IWL_INVALID_MAC80211_QUEUE; | |
484 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
485 | break; | |
486 | ||
487 | default: | |
488 | break; | |
489 | } | |
490 | } | |
491 | ||
492 | #ifdef CONFIG_IWLWIFI_DEBUG | |
493 | const char *iwl_mvm_get_tx_fail_reason(u32 status) | |
494 | { | |
495 | #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x | |
496 | #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x | |
497 | ||
498 | switch (status & TX_STATUS_MSK) { | |
499 | case TX_STATUS_SUCCESS: | |
500 | return "SUCCESS"; | |
501 | TX_STATUS_POSTPONE(DELAY); | |
502 | TX_STATUS_POSTPONE(FEW_BYTES); | |
503 | TX_STATUS_POSTPONE(BT_PRIO); | |
504 | TX_STATUS_POSTPONE(QUIET_PERIOD); | |
505 | TX_STATUS_POSTPONE(CALC_TTAK); | |
506 | TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); | |
507 | TX_STATUS_FAIL(SHORT_LIMIT); | |
508 | TX_STATUS_FAIL(LONG_LIMIT); | |
509 | TX_STATUS_FAIL(UNDERRUN); | |
510 | TX_STATUS_FAIL(DRAIN_FLOW); | |
511 | TX_STATUS_FAIL(RFKILL_FLUSH); | |
512 | TX_STATUS_FAIL(LIFE_EXPIRE); | |
513 | TX_STATUS_FAIL(DEST_PS); | |
514 | TX_STATUS_FAIL(HOST_ABORTED); | |
515 | TX_STATUS_FAIL(BT_RETRY); | |
516 | TX_STATUS_FAIL(STA_INVALID); | |
517 | TX_STATUS_FAIL(FRAG_DROPPED); | |
518 | TX_STATUS_FAIL(TID_DISABLE); | |
519 | TX_STATUS_FAIL(FIFO_FLUSHED); | |
520 | TX_STATUS_FAIL(SMALL_CF_POLL); | |
521 | TX_STATUS_FAIL(FW_DROP); | |
522 | TX_STATUS_FAIL(STA_COLOR_MISMATCH); | |
523 | } | |
524 | ||
525 | return "UNKNOWN"; | |
526 | ||
527 | #undef TX_STATUS_FAIL | |
528 | #undef TX_STATUS_POSTPONE | |
529 | } | |
530 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
531 | ||
d310e405 ES |
532 | void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, |
533 | enum ieee80211_band band, | |
534 | struct ieee80211_tx_rate *r) | |
8ca151b5 | 535 | { |
8ca151b5 JB |
536 | if (rate_n_flags & RATE_HT_MCS_GF_MSK) |
537 | r->flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
538 | switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { | |
539 | case RATE_MCS_CHAN_WIDTH_20: | |
540 | break; | |
541 | case RATE_MCS_CHAN_WIDTH_40: | |
542 | r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; | |
543 | break; | |
544 | case RATE_MCS_CHAN_WIDTH_80: | |
545 | r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; | |
546 | break; | |
547 | case RATE_MCS_CHAN_WIDTH_160: | |
548 | r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; | |
549 | break; | |
550 | } | |
551 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
552 | r->flags |= IEEE80211_TX_RC_SHORT_GI; | |
553 | if (rate_n_flags & RATE_MCS_HT_MSK) { | |
554 | r->flags |= IEEE80211_TX_RC_MCS; | |
555 | r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; | |
556 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { | |
557 | ieee80211_rate_set_vht( | |
558 | r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, | |
559 | ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> | |
560 | RATE_VHT_MCS_NSS_POS) + 1); | |
561 | r->flags |= IEEE80211_TX_RC_VHT_MCS; | |
562 | } else { | |
563 | r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, | |
d310e405 | 564 | band); |
8ca151b5 JB |
565 | } |
566 | } | |
567 | ||
d310e405 ES |
568 | /** |
569 | * translate ucode response to mac80211 tx status control values | |
570 | */ | |
571 | static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, | |
572 | struct ieee80211_tx_info *info) | |
573 | { | |
574 | struct ieee80211_tx_rate *r = &info->status.rates[0]; | |
575 | ||
576 | info->status.antenna = | |
577 | ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); | |
578 | iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); | |
579 | } | |
580 | ||
8ca151b5 JB |
581 | static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, |
582 | struct iwl_rx_packet *pkt) | |
583 | { | |
584 | struct ieee80211_sta *sta; | |
585 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
586 | int txq_id = SEQ_TO_QUEUE(sequence); | |
587 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
588 | int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); | |
589 | int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); | |
590 | u32 status = le16_to_cpu(tx_resp->status.status); | |
591 | u16 ssn = iwl_mvm_get_scd_ssn(tx_resp); | |
592 | struct iwl_mvm_sta *mvmsta; | |
593 | struct sk_buff_head skbs; | |
594 | u8 skb_freed = 0; | |
595 | u16 next_reclaimed, seq_ctl; | |
596 | ||
597 | __skb_queue_head_init(&skbs); | |
598 | ||
599 | seq_ctl = le16_to_cpu(tx_resp->seq_ctl); | |
600 | ||
601 | /* we can free until ssn % q.n_bd not inclusive */ | |
602 | iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); | |
603 | ||
604 | while (!skb_queue_empty(&skbs)) { | |
605 | struct sk_buff *skb = __skb_dequeue(&skbs); | |
606 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
607 | ||
608 | skb_freed++; | |
609 | ||
610 | iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); | |
611 | ||
612 | memset(&info->status, 0, sizeof(info->status)); | |
613 | ||
614 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; | |
615 | ||
616 | /* inform mac80211 about what happened with the frame */ | |
617 | switch (status & TX_STATUS_MSK) { | |
618 | case TX_STATUS_SUCCESS: | |
619 | case TX_STATUS_DIRECT_DONE: | |
620 | info->flags |= IEEE80211_TX_STAT_ACK; | |
621 | break; | |
622 | case TX_STATUS_FAIL_DEST_PS: | |
623 | info->flags |= IEEE80211_TX_STAT_TX_FILTERED; | |
624 | break; | |
625 | default: | |
626 | break; | |
627 | } | |
628 | ||
629 | info->status.rates[0].count = tx_resp->failure_frame + 1; | |
d310e405 ES |
630 | iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), |
631 | info); | |
8ca151b5 JB |
632 | |
633 | /* Single frame failure in an AMPDU queue => send BAR */ | |
19e737c9 | 634 | if (txq_id >= mvm->first_agg_queue && |
2470b36e | 635 | !(info->flags & IEEE80211_TX_STAT_ACK)) |
8ca151b5 | 636 | info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; |
8ca151b5 | 637 | |
ebea2f32 EG |
638 | /* W/A FW bug: seq_ctl is wrong when the status isn't success */ |
639 | if (status != TX_STATUS_SUCCESS) { | |
8ca151b5 JB |
640 | struct ieee80211_hdr *hdr = (void *)skb->data; |
641 | seq_ctl = le16_to_cpu(hdr->seq_ctrl); | |
642 | } | |
643 | ||
3a84b69e EP |
644 | BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); |
645 | info->status.status_driver_data[0] = | |
646 | (void *)(uintptr_t)tx_resp->reduced_tpc; | |
647 | ||
f14d6b39 | 648 | ieee80211_tx_status(mvm->hw, skb); |
8ca151b5 JB |
649 | } |
650 | ||
19e737c9 | 651 | if (txq_id >= mvm->first_agg_queue) { |
8ca151b5 JB |
652 | /* If this is an aggregation queue, we use the ssn since: |
653 | * ssn = wifi seq_num % 256. | |
654 | * The seq_ctl is the sequence control of the packet to which | |
655 | * this Tx response relates. But if there is a hole in the | |
656 | * bitmap of the BA we received, this Tx response may allow to | |
657 | * reclaim the hole and all the subsequent packets that were | |
658 | * already acked. In that case, seq_ctl != ssn, and the next | |
659 | * packet to be reclaimed will be ssn and not seq_ctl. In that | |
660 | * case, several packets will be reclaimed even if | |
661 | * frame_count = 1. | |
662 | * | |
663 | * The ssn is the index (% 256) of the latest packet that has | |
664 | * treated (acked / dropped) + 1. | |
665 | */ | |
666 | next_reclaimed = ssn; | |
667 | } else { | |
668 | /* The next packet to be reclaimed is the one after this one */ | |
9a886586 | 669 | next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10); |
8ca151b5 JB |
670 | } |
671 | ||
672 | IWL_DEBUG_TX_REPLY(mvm, | |
8c6e83d6 EG |
673 | "TXQ %d status %s (0x%08x)\n", |
674 | txq_id, iwl_mvm_get_tx_fail_reason(status), status); | |
675 | ||
676 | IWL_DEBUG_TX_REPLY(mvm, | |
677 | "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", | |
678 | le32_to_cpu(tx_resp->initial_rate), | |
8ca151b5 JB |
679 | tx_resp->failure_frame, SEQ_TO_INDEX(sequence), |
680 | ssn, next_reclaimed, seq_ctl); | |
681 | ||
682 | rcu_read_lock(); | |
683 | ||
684 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
9bb0c1ad EG |
685 | /* |
686 | * sta can't be NULL otherwise it'd mean that the sta has been freed in | |
687 | * the firmware while we still have packets for it in the Tx queues. | |
688 | */ | |
689 | if (WARN_ON_ONCE(!sta)) | |
690 | goto out; | |
8ca151b5 | 691 | |
9bb0c1ad | 692 | if (!IS_ERR(sta)) { |
5b577a90 | 693 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
694 | |
695 | if (tid != IWL_TID_NON_QOS) { | |
696 | struct iwl_mvm_tid_data *tid_data = | |
697 | &mvmsta->tid_data[tid]; | |
698 | ||
2bfb5092 | 699 | spin_lock_bh(&mvmsta->lock); |
8ca151b5 JB |
700 | tid_data->next_reclaimed = next_reclaimed; |
701 | IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n", | |
702 | next_reclaimed); | |
703 | iwl_mvm_check_ratid_empty(mvm, sta, tid); | |
2bfb5092 | 704 | spin_unlock_bh(&mvmsta->lock); |
8ca151b5 | 705 | } |
3e56eadf JB |
706 | |
707 | if (mvmsta->next_status_eosp) { | |
708 | mvmsta->next_status_eosp = false; | |
709 | ieee80211_sta_eosp(sta); | |
710 | } | |
8ca151b5 | 711 | } else { |
8ca151b5 JB |
712 | mvmsta = NULL; |
713 | } | |
714 | ||
715 | /* | |
716 | * If the txq is not an AMPDU queue, there is no chance we freed | |
717 | * several skbs. Check that out... | |
8ca151b5 | 718 | */ |
9bb0c1ad EG |
719 | if (txq_id >= mvm->first_agg_queue) |
720 | goto out; | |
721 | ||
722 | /* We can't free more than one frame at once on a shared queue */ | |
723 | WARN_ON(skb_freed > 1); | |
724 | ||
725 | /* If we have still frames from this STA nothing to do here */ | |
726 | if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) | |
727 | goto out; | |
728 | ||
729 | if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) { | |
730 | /* | |
731 | * If there are no pending frames for this STA, notify | |
732 | * mac80211 that this station can go to sleep in its | |
733 | * STA table. | |
734 | * If mvmsta is not NULL, sta is valid. | |
735 | */ | |
736 | ieee80211_sta_block_awake(mvm->hw, sta, false); | |
737 | } | |
738 | ||
739 | if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) { | |
740 | /* | |
741 | * We are draining and this was the last packet - pre_rcu_remove | |
742 | * has been called already. We might be after the | |
743 | * synchronize_net already. | |
744 | * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues. | |
745 | */ | |
746 | set_bit(sta_id, mvm->sta_drained); | |
747 | schedule_work(&mvm->sta_drained_wk); | |
8ca151b5 JB |
748 | } |
749 | ||
9bb0c1ad | 750 | out: |
8ca151b5 JB |
751 | rcu_read_unlock(); |
752 | } | |
753 | ||
754 | #ifdef CONFIG_IWLWIFI_DEBUG | |
755 | #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x | |
756 | static const char *iwl_get_agg_tx_status(u16 status) | |
757 | { | |
758 | switch (status & AGG_TX_STATE_STATUS_MSK) { | |
759 | AGG_TX_STATE_(TRANSMITTED); | |
760 | AGG_TX_STATE_(UNDERRUN); | |
761 | AGG_TX_STATE_(BT_PRIO); | |
762 | AGG_TX_STATE_(FEW_BYTES); | |
763 | AGG_TX_STATE_(ABORT); | |
764 | AGG_TX_STATE_(LAST_SENT_TTL); | |
765 | AGG_TX_STATE_(LAST_SENT_TRY_CNT); | |
766 | AGG_TX_STATE_(LAST_SENT_BT_KILL); | |
767 | AGG_TX_STATE_(SCD_QUERY); | |
768 | AGG_TX_STATE_(TEST_BAD_CRC32); | |
769 | AGG_TX_STATE_(RESPONSE); | |
770 | AGG_TX_STATE_(DUMP_TX); | |
771 | AGG_TX_STATE_(DELAY_TX); | |
772 | } | |
773 | ||
774 | return "UNKNOWN"; | |
775 | } | |
776 | ||
777 | static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, | |
778 | struct iwl_rx_packet *pkt) | |
779 | { | |
780 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
781 | struct agg_tx_status *frame_status = &tx_resp->status; | |
782 | int i; | |
783 | ||
784 | for (i = 0; i < tx_resp->frame_count; i++) { | |
785 | u16 fstatus = le16_to_cpu(frame_status[i].status); | |
786 | ||
787 | IWL_DEBUG_TX_REPLY(mvm, | |
788 | "status %s (0x%04x), try-count (%d) seq (0x%x)\n", | |
789 | iwl_get_agg_tx_status(fstatus), | |
790 | fstatus & AGG_TX_STATE_STATUS_MSK, | |
791 | (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> | |
792 | AGG_TX_STATE_TRY_CNT_POS, | |
793 | le16_to_cpu(frame_status[i].sequence)); | |
794 | } | |
795 | } | |
796 | #else | |
797 | static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, | |
798 | struct iwl_rx_packet *pkt) | |
799 | {} | |
800 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
801 | ||
802 | static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, | |
803 | struct iwl_rx_packet *pkt) | |
804 | { | |
805 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
806 | int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); | |
807 | int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); | |
808 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
809 | struct ieee80211_sta *sta; | |
810 | ||
19e737c9 | 811 | if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue)) |
8ca151b5 JB |
812 | return; |
813 | ||
814 | if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) | |
815 | return; | |
816 | ||
817 | iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); | |
818 | ||
819 | rcu_read_lock(); | |
820 | ||
821 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
822 | ||
823 | if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { | |
5b577a90 | 824 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
825 | mvmsta->tid_data[tid].rate_n_flags = |
826 | le32_to_cpu(tx_resp->initial_rate); | |
3a84b69e | 827 | mvmsta->tid_data[tid].reduced_tpc = tx_resp->reduced_tpc; |
8ca151b5 JB |
828 | } |
829 | ||
830 | rcu_read_unlock(); | |
831 | } | |
832 | ||
833 | int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, | |
834 | struct iwl_device_cmd *cmd) | |
835 | { | |
836 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
837 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
838 | ||
839 | if (tx_resp->frame_count == 1) | |
840 | iwl_mvm_rx_tx_cmd_single(mvm, pkt); | |
841 | else | |
842 | iwl_mvm_rx_tx_cmd_agg(mvm, pkt); | |
843 | ||
844 | return 0; | |
845 | } | |
846 | ||
847 | int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, | |
848 | struct iwl_device_cmd *cmd) | |
849 | { | |
850 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
851 | struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data; | |
852 | struct sk_buff_head reclaimed_skbs; | |
853 | struct iwl_mvm_tid_data *tid_data; | |
8ca151b5 JB |
854 | struct ieee80211_sta *sta; |
855 | struct iwl_mvm_sta *mvmsta; | |
8ca151b5 JB |
856 | struct sk_buff *skb; |
857 | int sta_id, tid, freed; | |
8ca151b5 JB |
858 | /* "flow" corresponds to Tx queue */ |
859 | u16 scd_flow = le16_to_cpu(ba_notif->scd_flow); | |
8ca151b5 JB |
860 | /* "ssn" is start of block-ack Tx window, corresponds to index |
861 | * (in Tx queue's circular buffer) of first TFD/frame in window */ | |
862 | u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn); | |
863 | ||
864 | sta_id = ba_notif->sta_id; | |
865 | tid = ba_notif->tid; | |
866 | ||
867 | rcu_read_lock(); | |
868 | ||
869 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
870 | ||
871 | /* Reclaiming frames for a station that has been deleted ? */ | |
872 | if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { | |
873 | rcu_read_unlock(); | |
874 | return 0; | |
875 | } | |
876 | ||
5b577a90 | 877 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
878 | tid_data = &mvmsta->tid_data[tid]; |
879 | ||
880 | if (WARN_ONCE(tid_data->txq_id != scd_flow, "Q %d, tid %d, flow %d", | |
881 | tid_data->txq_id, tid, scd_flow)) { | |
882 | rcu_read_unlock(); | |
883 | return 0; | |
884 | } | |
885 | ||
2bfb5092 | 886 | spin_lock_bh(&mvmsta->lock); |
8ca151b5 JB |
887 | |
888 | __skb_queue_head_init(&reclaimed_skbs); | |
889 | ||
890 | /* | |
891 | * Release all TFDs before the SSN, i.e. all TFDs in front of | |
892 | * block-ack window (we assume that they've been successfully | |
893 | * transmitted ... if not, it's too late anyway). | |
894 | */ | |
895 | iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn, | |
896 | &reclaimed_skbs); | |
897 | ||
898 | IWL_DEBUG_TX_REPLY(mvm, | |
899 | "BA_NOTIFICATION Received from %pM, sta_id = %d\n", | |
900 | (u8 *)&ba_notif->sta_addr_lo32, | |
901 | ba_notif->sta_id); | |
902 | IWL_DEBUG_TX_REPLY(mvm, | |
903 | "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", | |
904 | ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), | |
905 | (unsigned long long)le64_to_cpu(ba_notif->bitmap), | |
906 | scd_flow, ba_resp_scd_ssn, ba_notif->txed, | |
907 | ba_notif->txed_2_done); | |
908 | ||
909 | tid_data->next_reclaimed = ba_resp_scd_ssn; | |
910 | ||
911 | iwl_mvm_check_ratid_empty(mvm, sta, tid); | |
912 | ||
913 | freed = 0; | |
914 | ||
915 | skb_queue_walk(&reclaimed_skbs, skb) { | |
143582c6 JB |
916 | struct ieee80211_hdr *hdr = (void *)skb->data; |
917 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
8ca151b5 JB |
918 | |
919 | if (ieee80211_is_data_qos(hdr->frame_control)) | |
920 | freed++; | |
921 | else | |
922 | WARN_ON_ONCE(1); | |
923 | ||
8ca151b5 JB |
924 | iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); |
925 | ||
143582c6 JB |
926 | memset(&info->status, 0, sizeof(info->status)); |
927 | /* Packet was transmitted successfully, failures come as single | |
928 | * frames because before failing a frame the firmware transmits | |
929 | * it without aggregation at least once. | |
930 | */ | |
931 | info->flags |= IEEE80211_TX_STAT_ACK; | |
932 | ||
8ca151b5 JB |
933 | if (freed == 1) { |
934 | /* this is the first skb we deliver in this batch */ | |
935 | /* put the rate scaling data there */ | |
8ca151b5 JB |
936 | info->flags |= IEEE80211_TX_STAT_AMPDU; |
937 | info->status.ampdu_ack_len = ba_notif->txed_2_done; | |
938 | info->status.ampdu_len = ba_notif->txed; | |
d310e405 ES |
939 | iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags, |
940 | info); | |
3a84b69e EP |
941 | info->status.status_driver_data[0] = |
942 | (void *)(uintptr_t)tid_data->reduced_tpc; | |
8ca151b5 JB |
943 | } |
944 | } | |
945 | ||
2bfb5092 | 946 | spin_unlock_bh(&mvmsta->lock); |
8ca151b5 JB |
947 | |
948 | rcu_read_unlock(); | |
949 | ||
950 | while (!skb_queue_empty(&reclaimed_skbs)) { | |
951 | skb = __skb_dequeue(&reclaimed_skbs); | |
f14d6b39 | 952 | ieee80211_tx_status(mvm->hw, skb); |
8ca151b5 JB |
953 | } |
954 | ||
955 | return 0; | |
956 | } | |
957 | ||
958 | int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync) | |
959 | { | |
960 | int ret; | |
961 | struct iwl_tx_path_flush_cmd flush_cmd = { | |
962 | .queues_ctl = cpu_to_le32(tfd_msk), | |
963 | .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), | |
964 | }; | |
965 | ||
a1022927 | 966 | u32 flags = sync ? 0 : CMD_ASYNC; |
8ca151b5 JB |
967 | |
968 | ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, | |
969 | sizeof(flush_cmd), &flush_cmd); | |
970 | if (ret) | |
971 | IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); | |
972 | return ret; | |
973 | } |