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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. |
8b4139dc | 9 | * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH |
8ca151b5 JB |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of version 2 of the GNU General Public License as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
23 | * USA | |
24 | * | |
25 | * The full GNU General Public License is included in this distribution | |
410dc5aa | 26 | * in the file called COPYING. |
8ca151b5 JB |
27 | * |
28 | * Contact Information: | |
29 | * Intel Linux Wireless <ilw@linux.intel.com> | |
30 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
31 | * | |
32 | * BSD LICENSE | |
33 | * | |
51368bf7 | 34 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
8b4139dc | 35 | * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH |
8ca151b5 JB |
36 | * All rights reserved. |
37 | * | |
38 | * Redistribution and use in source and binary forms, with or without | |
39 | * modification, are permitted provided that the following conditions | |
40 | * are met: | |
41 | * | |
42 | * * Redistributions of source code must retain the above copyright | |
43 | * notice, this list of conditions and the following disclaimer. | |
44 | * * Redistributions in binary form must reproduce the above copyright | |
45 | * notice, this list of conditions and the following disclaimer in | |
46 | * the documentation and/or other materials provided with the | |
47 | * distribution. | |
48 | * * Neither the name Intel Corporation nor the names of its | |
49 | * contributors may be used to endorse or promote products derived | |
50 | * from this software without specific prior written permission. | |
51 | * | |
52 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
53 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
54 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
55 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
56 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
57 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
58 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
59 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
60 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
61 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
62 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
63 | * | |
64 | *****************************************************************************/ | |
65 | #include <linux/ieee80211.h> | |
66 | #include <linux/etherdevice.h> | |
67 | ||
68 | #include "iwl-trans.h" | |
69 | #include "iwl-eeprom-parse.h" | |
70 | #include "mvm.h" | |
71 | #include "sta.h" | |
72 | ||
73 | /* | |
74 | * Sets most of the Tx cmd's fields | |
75 | */ | |
6ce73e65 AN |
76 | void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, |
77 | struct iwl_tx_cmd *tx_cmd, | |
78 | struct ieee80211_tx_info *info, u8 sta_id) | |
8ca151b5 JB |
79 | { |
80 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
81 | __le16 fc = hdr->frame_control; | |
82 | u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); | |
83 | u32 len = skb->len + FCS_LEN; | |
b797e3fb | 84 | u8 ac; |
8ca151b5 JB |
85 | |
86 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
87 | tx_flags |= TX_CMD_FLG_ACK; | |
88 | else | |
89 | tx_flags &= ~TX_CMD_FLG_ACK; | |
90 | ||
91 | if (ieee80211_is_probe_resp(fc)) | |
92 | tx_flags |= TX_CMD_FLG_TSF; | |
8ca151b5 | 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; | |
9b3b43d8 ES |
101 | } else if (ieee80211_is_back_req(fc)) { |
102 | struct ieee80211_bar *bar = (void *)skb->data; | |
103 | u16 control = le16_to_cpu(bar->control); | |
104 | ||
105 | tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; | |
106 | tx_cmd->tid_tspec = (control & | |
107 | IEEE80211_BAR_CTRL_TID_INFO_MASK) >> | |
108 | IEEE80211_BAR_CTRL_TID_INFO_SHIFT; | |
109 | WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); | |
8ca151b5 JB |
110 | } else { |
111 | tx_cmd->tid_tspec = IWL_TID_NON_QOS; | |
112 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) | |
113 | tx_flags |= TX_CMD_FLG_SEQ_CTL; | |
114 | else | |
115 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL; | |
116 | } | |
117 | ||
a9dc5060 ES |
118 | /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */ |
119 | if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) | |
120 | ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; | |
121 | else | |
122 | ac = tid_to_mac80211_ac[0]; | |
123 | ||
b797e3fb EG |
124 | tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << |
125 | TX_CMD_FLG_BT_PRIO_POS; | |
126 | ||
8ca151b5 JB |
127 | if (ieee80211_is_mgmt(fc)) { |
128 | if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) | |
129 | tx_cmd->pm_frame_timeout = cpu_to_le16(3); | |
130 | else | |
131 | tx_cmd->pm_frame_timeout = cpu_to_le16(2); | |
132 | ||
133 | /* The spec allows Action frames in A-MPDU, we don't support | |
134 | * it | |
135 | */ | |
136 | WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); | |
63f7535d | 137 | } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { |
0f2ed58e | 138 | tx_cmd->pm_frame_timeout = cpu_to_le16(2); |
8ca151b5 JB |
139 | } else { |
140 | tx_cmd->pm_frame_timeout = 0; | |
141 | } | |
142 | ||
8ca151b5 JB |
143 | if (ieee80211_is_data(fc) && len > mvm->rts_threshold && |
144 | !is_multicast_ether_addr(ieee80211_get_DA(hdr))) | |
145 | tx_flags |= TX_CMD_FLG_PROT_REQUIRE; | |
146 | ||
f1daa00e AO |
147 | if ((mvm->fw->ucode_capa.capa[0] & |
148 | IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && | |
149 | ieee80211_action_contains_tpc(skb)) | |
150 | tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; | |
151 | ||
8ca151b5 JB |
152 | tx_cmd->tx_flags = cpu_to_le32(tx_flags); |
153 | /* Total # bytes to be transmitted */ | |
154 | tx_cmd->len = cpu_to_le16((u16)skb->len); | |
155 | tx_cmd->next_frame_len = 0; | |
156 | tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); | |
157 | tx_cmd->sta_id = sta_id; | |
158 | } | |
159 | ||
160 | /* | |
161 | * Sets the fields in the Tx cmd that are rate related | |
162 | */ | |
6ce73e65 AN |
163 | void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, |
164 | struct ieee80211_tx_info *info, | |
165 | struct ieee80211_sta *sta, __le16 fc) | |
8ca151b5 JB |
166 | { |
167 | u32 rate_flags; | |
168 | int rate_idx; | |
169 | u8 rate_plcp; | |
170 | ||
171 | /* Set retry limit on RTS packets */ | |
172 | tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; | |
173 | ||
174 | /* Set retry limit on DATA packets and Probe Responses*/ | |
175 | if (ieee80211_is_probe_resp(fc)) { | |
176 | tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; | |
177 | tx_cmd->rts_retry_limit = | |
178 | min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); | |
179 | } else if (ieee80211_is_back_req(fc)) { | |
180 | tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; | |
181 | } else { | |
182 | tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; | |
183 | } | |
184 | ||
185 | /* | |
e89044d7 | 186 | * for data packets, rate info comes from the table inside the fw. This |
1ffde699 | 187 | * table is controlled by LINK_QUALITY commands |
8ca151b5 JB |
188 | */ |
189 | ||
1ffde699 | 190 | if (ieee80211_is_data(fc) && sta) { |
8ca151b5 JB |
191 | tx_cmd->initial_rate_index = 0; |
192 | tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); | |
193 | return; | |
194 | } else if (ieee80211_is_back_req(fc)) { | |
2edc6ec6 EG |
195 | tx_cmd->tx_flags |= |
196 | cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); | |
8ca151b5 JB |
197 | } |
198 | ||
199 | /* HT rate doesn't make sense for a non data frame */ | |
200 | WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, | |
f85e9d19 JB |
201 | "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n", |
202 | info->control.rates[0].flags, | |
203 | info->control.rates[0].idx, | |
204 | le16_to_cpu(fc)); | |
8ca151b5 JB |
205 | |
206 | rate_idx = info->control.rates[0].idx; | |
207 | /* if the rate isn't a well known legacy rate, take the lowest one */ | |
208 | if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY) | |
209 | rate_idx = rate_lowest_index( | |
210 | &mvm->nvm_data->bands[info->band], sta); | |
211 | ||
212 | /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ | |
213 | if (info->band == IEEE80211_BAND_5GHZ) | |
214 | rate_idx += IWL_FIRST_OFDM_RATE; | |
215 | ||
216 | /* For 2.4 GHZ band, check that there is no need to remap */ | |
217 | BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); | |
218 | ||
219 | /* Get PLCP rate for tx_cmd->rate_n_flags */ | |
220 | rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); | |
221 | ||
222 | mvm->mgmt_last_antenna_idx = | |
a0544272 | 223 | iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), |
8ca151b5 | 224 | mvm->mgmt_last_antenna_idx); |
34c8b24f EG |
225 | |
226 | if (info->band == IEEE80211_BAND_2GHZ && | |
227 | !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) | |
bbab7582 | 228 | rate_flags = BIT(mvm->cfg->non_shared_ant) << RATE_MCS_ANT_POS; |
34c8b24f EG |
229 | else |
230 | rate_flags = | |
231 | BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; | |
8ca151b5 JB |
232 | |
233 | /* Set CCK flag as needed */ | |
234 | if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) | |
235 | rate_flags |= RATE_MCS_CCK_MSK; | |
236 | ||
237 | /* Set the rate in the TX cmd */ | |
238 | tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags); | |
239 | } | |
240 | ||
241 | /* | |
242 | * Sets the fields in the Tx cmd that are crypto related | |
243 | */ | |
6ce73e65 AN |
244 | void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, |
245 | struct ieee80211_tx_info *info, | |
246 | struct iwl_tx_cmd *tx_cmd, | |
247 | struct sk_buff *skb_frag) | |
8ca151b5 JB |
248 | { |
249 | struct ieee80211_key_conf *keyconf = info->control.hw_key; | |
250 | ||
251 | switch (keyconf->cipher) { | |
252 | case WLAN_CIPHER_SUITE_CCMP: | |
253 | tx_cmd->sec_ctl = TX_CMD_SEC_CCM; | |
254 | memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); | |
255 | if (info->flags & IEEE80211_TX_CTL_AMPDU) | |
256 | tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_CCMP_AGG); | |
257 | break; | |
258 | ||
259 | case WLAN_CIPHER_SUITE_TKIP: | |
260 | tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; | |
261 | ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); | |
262 | break; | |
263 | ||
264 | case WLAN_CIPHER_SUITE_WEP104: | |
265 | tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; | |
266 | /* fall through */ | |
267 | case WLAN_CIPHER_SUITE_WEP40: | |
268 | tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | | |
269 | ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & | |
270 | TX_CMD_SEC_WEP_KEY_IDX_MSK); | |
271 | ||
272 | memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); | |
273 | break; | |
274 | default: | |
e36e5433 | 275 | tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; |
8ca151b5 JB |
276 | } |
277 | } | |
278 | ||
279 | /* | |
280 | * Allocates and sets the Tx cmd the driver data pointers in the skb | |
281 | */ | |
282 | static struct iwl_device_cmd * | |
283 | iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, | |
284 | struct ieee80211_sta *sta, u8 sta_id) | |
285 | { | |
286 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
287 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
288 | struct iwl_device_cmd *dev_cmd; | |
289 | struct iwl_tx_cmd *tx_cmd; | |
290 | ||
291 | dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); | |
292 | ||
293 | if (unlikely(!dev_cmd)) | |
294 | return NULL; | |
295 | ||
296 | memset(dev_cmd, 0, sizeof(*dev_cmd)); | |
3961a61a | 297 | dev_cmd->hdr.cmd = TX_CMD; |
8ca151b5 JB |
298 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; |
299 | ||
300 | if (info->control.hw_key) | |
301 | iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb); | |
302 | ||
303 | iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); | |
304 | ||
305 | iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); | |
306 | ||
307 | memset(&info->status, 0, sizeof(info->status)); | |
308 | ||
309 | info->driver_data[0] = NULL; | |
310 | info->driver_data[1] = dev_cmd; | |
311 | ||
312 | return dev_cmd; | |
313 | } | |
314 | ||
315 | int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) | |
316 | { | |
317 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
318 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
319 | struct iwl_device_cmd *dev_cmd; | |
320 | struct iwl_tx_cmd *tx_cmd; | |
321 | u8 sta_id; | |
322 | ||
323 | if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU)) | |
324 | return -1; | |
325 | ||
326 | if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && | |
327 | (!info->control.vif || | |
328 | info->hw_queue != info->control.vif->cab_queue))) | |
329 | return -1; | |
330 | ||
7da91b0e AM |
331 | /* |
332 | * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used | |
333 | * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel | |
334 | * queue. STATION (HS2.0) uses the auxiliary context of the FW, | |
335 | * and hence needs to be sent on the aux queue | |
336 | */ | |
337 | if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && | |
338 | info->control.vif->type == NL80211_IFTYPE_STATION) | |
339 | IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue; | |
340 | ||
8ca151b5 JB |
341 | /* |
342 | * If the interface on which frame is sent is the P2P_DEVICE | |
343 | * or an AP/GO interface use the broadcast station associated | |
344 | * with it; otherwise use the AUX station. | |
345 | */ | |
346 | if (info->control.vif && | |
347 | (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE || | |
348 | info->control.vif->type == NL80211_IFTYPE_AP)) { | |
349 | struct iwl_mvm_vif *mvmvif = | |
350 | iwl_mvm_vif_from_mac80211(info->control.vif); | |
351 | sta_id = mvmvif->bcast_sta.sta_id; | |
352 | } else { | |
353 | sta_id = mvm->aux_sta.sta_id; | |
354 | } | |
355 | ||
356 | IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue); | |
357 | ||
358 | dev_cmd = iwl_mvm_set_tx_params(mvm, skb, NULL, sta_id); | |
359 | if (!dev_cmd) | |
360 | return -1; | |
361 | ||
362 | /* From now on, we cannot access info->control */ | |
363 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; | |
364 | ||
365 | /* Copy MAC header from skb into command buffer */ | |
366 | memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(hdr->frame_control)); | |
367 | ||
368 | if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) { | |
369 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); | |
370 | return -1; | |
371 | } | |
372 | ||
373 | return 0; | |
374 | } | |
375 | ||
376 | /* | |
377 | * Sets the fields in the Tx cmd that are crypto related | |
378 | */ | |
379 | int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, | |
380 | struct ieee80211_sta *sta) | |
381 | { | |
382 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
383 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
384 | struct iwl_mvm_sta *mvmsta; | |
385 | struct iwl_device_cmd *dev_cmd; | |
386 | struct iwl_tx_cmd *tx_cmd; | |
387 | __le16 fc; | |
388 | u16 seq_number = 0; | |
389 | u8 tid = IWL_MAX_TID_COUNT; | |
390 | u8 txq_id = info->hw_queue; | |
391 | bool is_data_qos = false, is_ampdu = false; | |
392 | ||
5b577a90 | 393 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
394 | fc = hdr->frame_control; |
395 | ||
396 | if (WARN_ON_ONCE(!mvmsta)) | |
397 | return -1; | |
398 | ||
881acd89 | 399 | if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) |
8ca151b5 JB |
400 | return -1; |
401 | ||
402 | dev_cmd = iwl_mvm_set_tx_params(mvm, skb, sta, mvmsta->sta_id); | |
403 | if (!dev_cmd) | |
404 | goto drop; | |
405 | ||
406 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; | |
407 | /* From now on, we cannot access info->control */ | |
408 | ||
3e56eadf JB |
409 | /* |
410 | * we handle that entirely ourselves -- for uAPSD the firmware | |
411 | * will always send a notification, and for PS-Poll responses | |
412 | * we'll notify mac80211 when getting frame status | |
413 | */ | |
414 | info->flags &= ~IEEE80211_TX_STATUS_EOSP; | |
415 | ||
8ca151b5 JB |
416 | spin_lock(&mvmsta->lock); |
417 | ||
418 | if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { | |
419 | u8 *qc = NULL; | |
420 | qc = ieee80211_get_qos_ctl(hdr); | |
421 | tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; | |
422 | if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) | |
423 | goto drop_unlock_sta; | |
424 | ||
425 | seq_number = mvmsta->tid_data[tid].seq_number; | |
426 | seq_number &= IEEE80211_SCTL_SEQ; | |
427 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); | |
428 | hdr->seq_ctrl |= cpu_to_le16(seq_number); | |
8ca151b5 JB |
429 | is_data_qos = true; |
430 | is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; | |
431 | } | |
432 | ||
433 | /* Copy MAC header from skb into command buffer */ | |
434 | memcpy(tx_cmd->hdr, hdr, ieee80211_hdrlen(fc)); | |
435 | ||
436 | WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); | |
437 | ||
a0f6bf2a AN |
438 | if (sta->tdls) { |
439 | /* default to TID 0 for non-QoS packets */ | |
440 | u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid; | |
441 | ||
442 | txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]]; | |
443 | } | |
444 | ||
8ca151b5 JB |
445 | if (is_ampdu) { |
446 | if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON)) | |
447 | goto drop_unlock_sta; | |
448 | txq_id = mvmsta->tid_data[tid].txq_id; | |
449 | } | |
450 | ||
451 | IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, | |
cf9d1188 | 452 | tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); |
8ca151b5 | 453 | |
8ca151b5 JB |
454 | if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) |
455 | goto drop_unlock_sta; | |
456 | ||
457 | if (is_data_qos && !ieee80211_has_morefrags(fc)) | |
cf9d1188 | 458 | mvmsta->tid_data[tid].seq_number = seq_number + 0x10; |
8ca151b5 JB |
459 | |
460 | spin_unlock(&mvmsta->lock); | |
461 | ||
19e737c9 | 462 | if (txq_id < mvm->first_agg_queue) |
e3d4bc8c | 463 | atomic_inc(&mvm->pending_frames[mvmsta->sta_id]); |
8ca151b5 JB |
464 | |
465 | return 0; | |
466 | ||
467 | drop_unlock_sta: | |
468 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); | |
469 | spin_unlock(&mvmsta->lock); | |
470 | drop: | |
471 | return -1; | |
472 | } | |
473 | ||
474 | static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, | |
475 | struct ieee80211_sta *sta, u8 tid) | |
476 | { | |
5b577a90 | 477 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
478 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; |
479 | struct ieee80211_vif *vif = mvmsta->vif; | |
480 | ||
481 | lockdep_assert_held(&mvmsta->lock); | |
482 | ||
3e56eadf JB |
483 | if ((tid_data->state == IWL_AGG_ON || |
484 | tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && | |
485 | iwl_mvm_tid_queued(tid_data) == 0) { | |
486 | /* | |
487 | * Now that this aggregation queue is empty tell mac80211 so it | |
488 | * knows we no longer have frames buffered for the station on | |
489 | * this TID (for the TIM bitmap calculation.) | |
490 | */ | |
491 | ieee80211_sta_set_buffered(sta, tid, false); | |
492 | } | |
493 | ||
8ca151b5 JB |
494 | if (tid_data->ssn != tid_data->next_reclaimed) |
495 | return; | |
496 | ||
497 | switch (tid_data->state) { | |
498 | case IWL_EMPTYING_HW_QUEUE_ADDBA: | |
499 | IWL_DEBUG_TX_QUEUES(mvm, | |
500 | "Can continue addBA flow ssn = next_recl = %d\n", | |
501 | tid_data->next_reclaimed); | |
502 | tid_data->state = IWL_AGG_STARTING; | |
503 | ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
504 | break; | |
505 | ||
506 | case IWL_EMPTYING_HW_QUEUE_DELBA: | |
507 | IWL_DEBUG_TX_QUEUES(mvm, | |
508 | "Can continue DELBA flow ssn = next_recl = %d\n", | |
509 | tid_data->next_reclaimed); | |
0294d9ee | 510 | iwl_mvm_disable_txq(mvm, tid_data->txq_id, CMD_ASYNC); |
8ca151b5 JB |
511 | tid_data->state = IWL_AGG_OFF; |
512 | /* | |
513 | * we can't hold the mutex - but since we are after a sequence | |
3edf8ff6 | 514 | * point (call to iwl_mvm_disable_txq(), so we don't even need |
8ca151b5 JB |
515 | * a memory barrier. |
516 | */ | |
517 | mvm->queue_to_mac80211[tid_data->txq_id] = | |
518 | IWL_INVALID_MAC80211_QUEUE; | |
519 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
520 | break; | |
521 | ||
522 | default: | |
523 | break; | |
524 | } | |
525 | } | |
526 | ||
527 | #ifdef CONFIG_IWLWIFI_DEBUG | |
528 | const char *iwl_mvm_get_tx_fail_reason(u32 status) | |
529 | { | |
530 | #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x | |
531 | #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x | |
532 | ||
533 | switch (status & TX_STATUS_MSK) { | |
534 | case TX_STATUS_SUCCESS: | |
535 | return "SUCCESS"; | |
536 | TX_STATUS_POSTPONE(DELAY); | |
537 | TX_STATUS_POSTPONE(FEW_BYTES); | |
538 | TX_STATUS_POSTPONE(BT_PRIO); | |
539 | TX_STATUS_POSTPONE(QUIET_PERIOD); | |
540 | TX_STATUS_POSTPONE(CALC_TTAK); | |
541 | TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); | |
542 | TX_STATUS_FAIL(SHORT_LIMIT); | |
543 | TX_STATUS_FAIL(LONG_LIMIT); | |
544 | TX_STATUS_FAIL(UNDERRUN); | |
545 | TX_STATUS_FAIL(DRAIN_FLOW); | |
546 | TX_STATUS_FAIL(RFKILL_FLUSH); | |
547 | TX_STATUS_FAIL(LIFE_EXPIRE); | |
548 | TX_STATUS_FAIL(DEST_PS); | |
549 | TX_STATUS_FAIL(HOST_ABORTED); | |
550 | TX_STATUS_FAIL(BT_RETRY); | |
551 | TX_STATUS_FAIL(STA_INVALID); | |
552 | TX_STATUS_FAIL(FRAG_DROPPED); | |
553 | TX_STATUS_FAIL(TID_DISABLE); | |
554 | TX_STATUS_FAIL(FIFO_FLUSHED); | |
555 | TX_STATUS_FAIL(SMALL_CF_POLL); | |
556 | TX_STATUS_FAIL(FW_DROP); | |
557 | TX_STATUS_FAIL(STA_COLOR_MISMATCH); | |
558 | } | |
559 | ||
560 | return "UNKNOWN"; | |
561 | ||
562 | #undef TX_STATUS_FAIL | |
563 | #undef TX_STATUS_POSTPONE | |
564 | } | |
565 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
566 | ||
d310e405 ES |
567 | void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, |
568 | enum ieee80211_band band, | |
569 | struct ieee80211_tx_rate *r) | |
8ca151b5 | 570 | { |
8ca151b5 JB |
571 | if (rate_n_flags & RATE_HT_MCS_GF_MSK) |
572 | r->flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
573 | switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { | |
574 | case RATE_MCS_CHAN_WIDTH_20: | |
575 | break; | |
576 | case RATE_MCS_CHAN_WIDTH_40: | |
577 | r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; | |
578 | break; | |
579 | case RATE_MCS_CHAN_WIDTH_80: | |
580 | r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; | |
581 | break; | |
582 | case RATE_MCS_CHAN_WIDTH_160: | |
583 | r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; | |
584 | break; | |
585 | } | |
586 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
587 | r->flags |= IEEE80211_TX_RC_SHORT_GI; | |
588 | if (rate_n_flags & RATE_MCS_HT_MSK) { | |
589 | r->flags |= IEEE80211_TX_RC_MCS; | |
590 | r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; | |
591 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { | |
592 | ieee80211_rate_set_vht( | |
593 | r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, | |
594 | ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> | |
595 | RATE_VHT_MCS_NSS_POS) + 1); | |
596 | r->flags |= IEEE80211_TX_RC_VHT_MCS; | |
597 | } else { | |
598 | r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, | |
d310e405 | 599 | band); |
8ca151b5 JB |
600 | } |
601 | } | |
602 | ||
d310e405 ES |
603 | /** |
604 | * translate ucode response to mac80211 tx status control values | |
605 | */ | |
606 | static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, | |
607 | struct ieee80211_tx_info *info) | |
608 | { | |
609 | struct ieee80211_tx_rate *r = &info->status.rates[0]; | |
610 | ||
611 | info->status.antenna = | |
612 | ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); | |
613 | iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); | |
614 | } | |
615 | ||
8ca151b5 JB |
616 | static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, |
617 | struct iwl_rx_packet *pkt) | |
618 | { | |
619 | struct ieee80211_sta *sta; | |
620 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
621 | int txq_id = SEQ_TO_QUEUE(sequence); | |
622 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
623 | int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); | |
624 | int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); | |
625 | u32 status = le16_to_cpu(tx_resp->status.status); | |
626 | u16 ssn = iwl_mvm_get_scd_ssn(tx_resp); | |
627 | struct iwl_mvm_sta *mvmsta; | |
628 | struct sk_buff_head skbs; | |
629 | u8 skb_freed = 0; | |
630 | u16 next_reclaimed, seq_ctl; | |
631 | ||
632 | __skb_queue_head_init(&skbs); | |
633 | ||
634 | seq_ctl = le16_to_cpu(tx_resp->seq_ctl); | |
635 | ||
636 | /* we can free until ssn % q.n_bd not inclusive */ | |
637 | iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); | |
638 | ||
639 | while (!skb_queue_empty(&skbs)) { | |
640 | struct sk_buff *skb = __skb_dequeue(&skbs); | |
641 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
642 | ||
643 | skb_freed++; | |
644 | ||
645 | iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); | |
646 | ||
647 | memset(&info->status, 0, sizeof(info->status)); | |
648 | ||
649 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; | |
650 | ||
651 | /* inform mac80211 about what happened with the frame */ | |
652 | switch (status & TX_STATUS_MSK) { | |
653 | case TX_STATUS_SUCCESS: | |
654 | case TX_STATUS_DIRECT_DONE: | |
655 | info->flags |= IEEE80211_TX_STAT_ACK; | |
656 | break; | |
657 | case TX_STATUS_FAIL_DEST_PS: | |
658 | info->flags |= IEEE80211_TX_STAT_TX_FILTERED; | |
659 | break; | |
660 | default: | |
661 | break; | |
662 | } | |
663 | ||
664 | info->status.rates[0].count = tx_resp->failure_frame + 1; | |
d310e405 ES |
665 | iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), |
666 | info); | |
929e6ede ES |
667 | info->status.status_driver_data[1] = |
668 | (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); | |
8ca151b5 JB |
669 | |
670 | /* Single frame failure in an AMPDU queue => send BAR */ | |
19e737c9 | 671 | if (txq_id >= mvm->first_agg_queue && |
9ce578a5 ES |
672 | !(info->flags & IEEE80211_TX_STAT_ACK) && |
673 | !(info->flags & IEEE80211_TX_STAT_TX_FILTERED)) | |
8ca151b5 | 674 | info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; |
8ca151b5 | 675 | |
ebea2f32 EG |
676 | /* W/A FW bug: seq_ctl is wrong when the status isn't success */ |
677 | if (status != TX_STATUS_SUCCESS) { | |
8ca151b5 JB |
678 | struct ieee80211_hdr *hdr = (void *)skb->data; |
679 | seq_ctl = le16_to_cpu(hdr->seq_ctrl); | |
680 | } | |
681 | ||
9b5452fd EG |
682 | /* |
683 | * TODO: this is not accurate if we are freeing more than one | |
684 | * packet. | |
685 | */ | |
686 | info->status.tx_time = | |
687 | le16_to_cpu(tx_resp->wireless_media_time); | |
3a84b69e EP |
688 | BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); |
689 | info->status.status_driver_data[0] = | |
690 | (void *)(uintptr_t)tx_resp->reduced_tpc; | |
691 | ||
f14d6b39 | 692 | ieee80211_tx_status(mvm->hw, skb); |
8ca151b5 JB |
693 | } |
694 | ||
19e737c9 | 695 | if (txq_id >= mvm->first_agg_queue) { |
8ca151b5 JB |
696 | /* If this is an aggregation queue, we use the ssn since: |
697 | * ssn = wifi seq_num % 256. | |
698 | * The seq_ctl is the sequence control of the packet to which | |
699 | * this Tx response relates. But if there is a hole in the | |
700 | * bitmap of the BA we received, this Tx response may allow to | |
701 | * reclaim the hole and all the subsequent packets that were | |
702 | * already acked. In that case, seq_ctl != ssn, and the next | |
703 | * packet to be reclaimed will be ssn and not seq_ctl. In that | |
704 | * case, several packets will be reclaimed even if | |
705 | * frame_count = 1. | |
706 | * | |
707 | * The ssn is the index (% 256) of the latest packet that has | |
708 | * treated (acked / dropped) + 1. | |
709 | */ | |
710 | next_reclaimed = ssn; | |
711 | } else { | |
712 | /* The next packet to be reclaimed is the one after this one */ | |
9a886586 | 713 | next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10); |
8ca151b5 JB |
714 | } |
715 | ||
716 | IWL_DEBUG_TX_REPLY(mvm, | |
8c6e83d6 EG |
717 | "TXQ %d status %s (0x%08x)\n", |
718 | txq_id, iwl_mvm_get_tx_fail_reason(status), status); | |
719 | ||
720 | IWL_DEBUG_TX_REPLY(mvm, | |
721 | "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", | |
722 | le32_to_cpu(tx_resp->initial_rate), | |
8ca151b5 JB |
723 | tx_resp->failure_frame, SEQ_TO_INDEX(sequence), |
724 | ssn, next_reclaimed, seq_ctl); | |
725 | ||
726 | rcu_read_lock(); | |
727 | ||
728 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
9bb0c1ad EG |
729 | /* |
730 | * sta can't be NULL otherwise it'd mean that the sta has been freed in | |
731 | * the firmware while we still have packets for it in the Tx queues. | |
732 | */ | |
733 | if (WARN_ON_ONCE(!sta)) | |
734 | goto out; | |
8ca151b5 | 735 | |
9bb0c1ad | 736 | if (!IS_ERR(sta)) { |
5b577a90 | 737 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
738 | |
739 | if (tid != IWL_TID_NON_QOS) { | |
740 | struct iwl_mvm_tid_data *tid_data = | |
741 | &mvmsta->tid_data[tid]; | |
742 | ||
2bfb5092 | 743 | spin_lock_bh(&mvmsta->lock); |
8ca151b5 JB |
744 | tid_data->next_reclaimed = next_reclaimed; |
745 | IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n", | |
746 | next_reclaimed); | |
747 | iwl_mvm_check_ratid_empty(mvm, sta, tid); | |
2bfb5092 | 748 | spin_unlock_bh(&mvmsta->lock); |
8ca151b5 | 749 | } |
3e56eadf JB |
750 | |
751 | if (mvmsta->next_status_eosp) { | |
752 | mvmsta->next_status_eosp = false; | |
753 | ieee80211_sta_eosp(sta); | |
754 | } | |
8ca151b5 | 755 | } else { |
8ca151b5 JB |
756 | mvmsta = NULL; |
757 | } | |
758 | ||
759 | /* | |
760 | * If the txq is not an AMPDU queue, there is no chance we freed | |
761 | * several skbs. Check that out... | |
8ca151b5 | 762 | */ |
9bb0c1ad EG |
763 | if (txq_id >= mvm->first_agg_queue) |
764 | goto out; | |
765 | ||
766 | /* We can't free more than one frame at once on a shared queue */ | |
767 | WARN_ON(skb_freed > 1); | |
768 | ||
589a6ba4 | 769 | /* If we have still frames for this STA nothing to do here */ |
9bb0c1ad EG |
770 | if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) |
771 | goto out; | |
772 | ||
773 | if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) { | |
003e5236 | 774 | |
9bb0c1ad | 775 | /* |
003e5236 AO |
776 | * If there are no pending frames for this STA and |
777 | * the tx to this station is not disabled, notify | |
778 | * mac80211 that this station can now wake up in its | |
9bb0c1ad EG |
779 | * STA table. |
780 | * If mvmsta is not NULL, sta is valid. | |
781 | */ | |
003e5236 AO |
782 | |
783 | spin_lock_bh(&mvmsta->lock); | |
784 | ||
785 | if (!mvmsta->disable_tx) | |
786 | ieee80211_sta_block_awake(mvm->hw, sta, false); | |
787 | ||
788 | spin_unlock_bh(&mvmsta->lock); | |
9bb0c1ad EG |
789 | } |
790 | ||
791 | if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) { | |
792 | /* | |
793 | * We are draining and this was the last packet - pre_rcu_remove | |
794 | * has been called already. We might be after the | |
795 | * synchronize_net already. | |
796 | * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues. | |
797 | */ | |
798 | set_bit(sta_id, mvm->sta_drained); | |
799 | schedule_work(&mvm->sta_drained_wk); | |
8ca151b5 JB |
800 | } |
801 | ||
9bb0c1ad | 802 | out: |
8ca151b5 JB |
803 | rcu_read_unlock(); |
804 | } | |
805 | ||
806 | #ifdef CONFIG_IWLWIFI_DEBUG | |
807 | #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x | |
808 | static const char *iwl_get_agg_tx_status(u16 status) | |
809 | { | |
810 | switch (status & AGG_TX_STATE_STATUS_MSK) { | |
811 | AGG_TX_STATE_(TRANSMITTED); | |
812 | AGG_TX_STATE_(UNDERRUN); | |
813 | AGG_TX_STATE_(BT_PRIO); | |
814 | AGG_TX_STATE_(FEW_BYTES); | |
815 | AGG_TX_STATE_(ABORT); | |
816 | AGG_TX_STATE_(LAST_SENT_TTL); | |
817 | AGG_TX_STATE_(LAST_SENT_TRY_CNT); | |
818 | AGG_TX_STATE_(LAST_SENT_BT_KILL); | |
819 | AGG_TX_STATE_(SCD_QUERY); | |
820 | AGG_TX_STATE_(TEST_BAD_CRC32); | |
821 | AGG_TX_STATE_(RESPONSE); | |
822 | AGG_TX_STATE_(DUMP_TX); | |
823 | AGG_TX_STATE_(DELAY_TX); | |
824 | } | |
825 | ||
826 | return "UNKNOWN"; | |
827 | } | |
828 | ||
829 | static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, | |
830 | struct iwl_rx_packet *pkt) | |
831 | { | |
832 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
833 | struct agg_tx_status *frame_status = &tx_resp->status; | |
834 | int i; | |
835 | ||
836 | for (i = 0; i < tx_resp->frame_count; i++) { | |
837 | u16 fstatus = le16_to_cpu(frame_status[i].status); | |
838 | ||
839 | IWL_DEBUG_TX_REPLY(mvm, | |
840 | "status %s (0x%04x), try-count (%d) seq (0x%x)\n", | |
841 | iwl_get_agg_tx_status(fstatus), | |
842 | fstatus & AGG_TX_STATE_STATUS_MSK, | |
843 | (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> | |
844 | AGG_TX_STATE_TRY_CNT_POS, | |
845 | le16_to_cpu(frame_status[i].sequence)); | |
846 | } | |
847 | } | |
848 | #else | |
849 | static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, | |
850 | struct iwl_rx_packet *pkt) | |
851 | {} | |
852 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
853 | ||
854 | static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, | |
855 | struct iwl_rx_packet *pkt) | |
856 | { | |
857 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
858 | int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); | |
859 | int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); | |
860 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
861 | struct ieee80211_sta *sta; | |
862 | ||
19e737c9 | 863 | if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue)) |
8ca151b5 JB |
864 | return; |
865 | ||
866 | if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) | |
867 | return; | |
868 | ||
869 | iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); | |
870 | ||
871 | rcu_read_lock(); | |
872 | ||
873 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
874 | ||
875 | if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { | |
5b577a90 | 876 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
877 | mvmsta->tid_data[tid].rate_n_flags = |
878 | le32_to_cpu(tx_resp->initial_rate); | |
3a84b69e | 879 | mvmsta->tid_data[tid].reduced_tpc = tx_resp->reduced_tpc; |
9b5452fd EG |
880 | mvmsta->tid_data[tid].tx_time = |
881 | le16_to_cpu(tx_resp->wireless_media_time); | |
8ca151b5 JB |
882 | } |
883 | ||
884 | rcu_read_unlock(); | |
885 | } | |
886 | ||
887 | int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, | |
888 | struct iwl_device_cmd *cmd) | |
889 | { | |
890 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
891 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
892 | ||
893 | if (tx_resp->frame_count == 1) | |
894 | iwl_mvm_rx_tx_cmd_single(mvm, pkt); | |
895 | else | |
896 | iwl_mvm_rx_tx_cmd_agg(mvm, pkt); | |
897 | ||
898 | return 0; | |
899 | } | |
900 | ||
a7130442 ES |
901 | static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info, |
902 | struct iwl_mvm_ba_notif *ba_notif, | |
903 | struct iwl_mvm_tid_data *tid_data) | |
904 | { | |
905 | info->flags |= IEEE80211_TX_STAT_AMPDU; | |
906 | info->status.ampdu_ack_len = ba_notif->txed_2_done; | |
907 | info->status.ampdu_len = ba_notif->txed; | |
908 | iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags, | |
909 | info); | |
9b5452fd EG |
910 | /* TODO: not accounted if the whole A-MPDU failed */ |
911 | info->status.tx_time = tid_data->tx_time; | |
a7130442 ES |
912 | info->status.status_driver_data[0] = |
913 | (void *)(uintptr_t)tid_data->reduced_tpc; | |
929e6ede ES |
914 | info->status.status_driver_data[1] = |
915 | (void *)(uintptr_t)tid_data->rate_n_flags; | |
a7130442 ES |
916 | } |
917 | ||
8ca151b5 JB |
918 | int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, |
919 | struct iwl_device_cmd *cmd) | |
920 | { | |
921 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
922 | struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data; | |
923 | struct sk_buff_head reclaimed_skbs; | |
924 | struct iwl_mvm_tid_data *tid_data; | |
8ca151b5 JB |
925 | struct ieee80211_sta *sta; |
926 | struct iwl_mvm_sta *mvmsta; | |
8ca151b5 JB |
927 | struct sk_buff *skb; |
928 | int sta_id, tid, freed; | |
8ca151b5 JB |
929 | /* "flow" corresponds to Tx queue */ |
930 | u16 scd_flow = le16_to_cpu(ba_notif->scd_flow); | |
8ca151b5 JB |
931 | /* "ssn" is start of block-ack Tx window, corresponds to index |
932 | * (in Tx queue's circular buffer) of first TFD/frame in window */ | |
933 | u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn); | |
934 | ||
935 | sta_id = ba_notif->sta_id; | |
936 | tid = ba_notif->tid; | |
937 | ||
2cee4762 ES |
938 | if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || |
939 | tid >= IWL_MAX_TID_COUNT, | |
940 | "sta_id %d tid %d", sta_id, tid)) | |
941 | return 0; | |
942 | ||
8ca151b5 JB |
943 | rcu_read_lock(); |
944 | ||
945 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
946 | ||
947 | /* Reclaiming frames for a station that has been deleted ? */ | |
948 | if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { | |
949 | rcu_read_unlock(); | |
950 | return 0; | |
951 | } | |
952 | ||
5b577a90 | 953 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
954 | tid_data = &mvmsta->tid_data[tid]; |
955 | ||
1f16ea29 JB |
956 | if (tid_data->txq_id != scd_flow) { |
957 | IWL_ERR(mvm, | |
958 | "invalid BA notification: Q %d, tid %d, flow %d\n", | |
959 | tid_data->txq_id, tid, scd_flow); | |
8ca151b5 JB |
960 | rcu_read_unlock(); |
961 | return 0; | |
962 | } | |
963 | ||
2bfb5092 | 964 | spin_lock_bh(&mvmsta->lock); |
8ca151b5 JB |
965 | |
966 | __skb_queue_head_init(&reclaimed_skbs); | |
967 | ||
968 | /* | |
969 | * Release all TFDs before the SSN, i.e. all TFDs in front of | |
970 | * block-ack window (we assume that they've been successfully | |
971 | * transmitted ... if not, it's too late anyway). | |
972 | */ | |
973 | iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn, | |
974 | &reclaimed_skbs); | |
975 | ||
976 | IWL_DEBUG_TX_REPLY(mvm, | |
977 | "BA_NOTIFICATION Received from %pM, sta_id = %d\n", | |
978 | (u8 *)&ba_notif->sta_addr_lo32, | |
979 | ba_notif->sta_id); | |
980 | IWL_DEBUG_TX_REPLY(mvm, | |
981 | "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", | |
982 | ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), | |
983 | (unsigned long long)le64_to_cpu(ba_notif->bitmap), | |
984 | scd_flow, ba_resp_scd_ssn, ba_notif->txed, | |
985 | ba_notif->txed_2_done); | |
986 | ||
987 | tid_data->next_reclaimed = ba_resp_scd_ssn; | |
988 | ||
989 | iwl_mvm_check_ratid_empty(mvm, sta, tid); | |
990 | ||
991 | freed = 0; | |
992 | ||
993 | skb_queue_walk(&reclaimed_skbs, skb) { | |
143582c6 JB |
994 | struct ieee80211_hdr *hdr = (void *)skb->data; |
995 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
8ca151b5 JB |
996 | |
997 | if (ieee80211_is_data_qos(hdr->frame_control)) | |
998 | freed++; | |
999 | else | |
1000 | WARN_ON_ONCE(1); | |
1001 | ||
8ca151b5 JB |
1002 | iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); |
1003 | ||
143582c6 JB |
1004 | memset(&info->status, 0, sizeof(info->status)); |
1005 | /* Packet was transmitted successfully, failures come as single | |
1006 | * frames because before failing a frame the firmware transmits | |
1007 | * it without aggregation at least once. | |
1008 | */ | |
1009 | info->flags |= IEEE80211_TX_STAT_ACK; | |
1010 | ||
a7130442 ES |
1011 | /* this is the first skb we deliver in this batch */ |
1012 | /* put the rate scaling data there */ | |
1013 | if (freed == 1) | |
1014 | iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data); | |
8ca151b5 JB |
1015 | } |
1016 | ||
2bfb5092 | 1017 | spin_unlock_bh(&mvmsta->lock); |
8ca151b5 | 1018 | |
a7130442 ES |
1019 | /* We got a BA notif with 0 acked or scd_ssn didn't progress which is |
1020 | * possible (i.e. first MPDU in the aggregation wasn't acked) | |
1021 | * Still it's important to update RS about sent vs. acked. | |
1022 | */ | |
1023 | if (skb_queue_empty(&reclaimed_skbs)) { | |
1024 | struct ieee80211_tx_info ba_info = {}; | |
1025 | struct ieee80211_chanctx_conf *chanctx_conf = NULL; | |
1026 | ||
1027 | if (mvmsta->vif) | |
1028 | chanctx_conf = | |
1029 | rcu_dereference(mvmsta->vif->chanctx_conf); | |
1030 | ||
1031 | if (WARN_ON_ONCE(!chanctx_conf)) | |
1032 | goto out; | |
1033 | ||
1034 | ba_info.band = chanctx_conf->def.chan->band; | |
1035 | iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data); | |
1036 | ||
1037 | IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); | |
1038 | iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info); | |
1039 | } | |
1040 | ||
1041 | out: | |
8ca151b5 JB |
1042 | rcu_read_unlock(); |
1043 | ||
1044 | while (!skb_queue_empty(&reclaimed_skbs)) { | |
1045 | skb = __skb_dequeue(&reclaimed_skbs); | |
f14d6b39 | 1046 | ieee80211_tx_status(mvm->hw, skb); |
8ca151b5 JB |
1047 | } |
1048 | ||
1049 | return 0; | |
1050 | } | |
1051 | ||
fe92e32a EG |
1052 | /* |
1053 | * Note that there are transports that buffer frames before they reach | |
1054 | * the firmware. This means that after flush_tx_path is called, the | |
1055 | * queue might not be empty. The race-free way to handle this is to: | |
1056 | * 1) set the station as draining | |
1057 | * 2) flush the Tx path | |
1058 | * 3) wait for the transport queues to be empty | |
1059 | */ | |
8ca151b5 JB |
1060 | int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync) |
1061 | { | |
1062 | int ret; | |
1063 | struct iwl_tx_path_flush_cmd flush_cmd = { | |
1064 | .queues_ctl = cpu_to_le32(tfd_msk), | |
1065 | .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), | |
1066 | }; | |
1067 | ||
a1022927 | 1068 | u32 flags = sync ? 0 : CMD_ASYNC; |
8ca151b5 JB |
1069 | |
1070 | ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, | |
1071 | sizeof(flush_cmd), &flush_cmd); | |
1072 | if (ret) | |
1073 | IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); | |
1074 | return ret; | |
1075 | } |