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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. |
4203263d | 9 | * Copyright(c) 2013 - 2015 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: | |
cb2f8277 | 29 | * Intel Linux Wireless <linuxwifi@intel.com> |
8ca151b5 JB |
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. |
4203263d | 35 | * Copyright(c) 2013 - 2015 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" | |
2f89a5d7 | 72 | #include "fw-dbg.h" |
8ca151b5 | 73 | |
4203263d EG |
74 | static void |
75 | iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, | |
76 | u16 tid, u16 ssn) | |
77 | { | |
78 | struct iwl_fw_dbg_trigger_tlv *trig; | |
79 | struct iwl_fw_dbg_trigger_ba *ba_trig; | |
80 | ||
81 | if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA)) | |
82 | return; | |
83 | ||
84 | trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA); | |
85 | ba_trig = (void *)trig->data; | |
86 | ||
87 | if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) | |
88 | return; | |
89 | ||
90 | if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) | |
91 | return; | |
92 | ||
93 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, | |
94 | "BAR sent to %pM, tid %d, ssn %d", | |
95 | addr, tid, ssn); | |
96 | } | |
97 | ||
8ca151b5 JB |
98 | /* |
99 | * Sets most of the Tx cmd's fields | |
100 | */ | |
6ce73e65 AN |
101 | void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, |
102 | struct iwl_tx_cmd *tx_cmd, | |
103 | struct ieee80211_tx_info *info, u8 sta_id) | |
8ca151b5 JB |
104 | { |
105 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
106 | __le16 fc = hdr->frame_control; | |
107 | u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); | |
108 | u32 len = skb->len + FCS_LEN; | |
b797e3fb | 109 | u8 ac; |
8ca151b5 JB |
110 | |
111 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
112 | tx_flags |= TX_CMD_FLG_ACK; | |
113 | else | |
114 | tx_flags &= ~TX_CMD_FLG_ACK; | |
115 | ||
116 | if (ieee80211_is_probe_resp(fc)) | |
117 | tx_flags |= TX_CMD_FLG_TSF; | |
8ca151b5 | 118 | |
8ca151b5 JB |
119 | if (ieee80211_has_morefrags(fc)) |
120 | tx_flags |= TX_CMD_FLG_MORE_FRAG; | |
121 | ||
122 | if (ieee80211_is_data_qos(fc)) { | |
123 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
124 | tx_cmd->tid_tspec = qc[0] & 0xf; | |
125 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL; | |
9b3b43d8 ES |
126 | } else if (ieee80211_is_back_req(fc)) { |
127 | struct ieee80211_bar *bar = (void *)skb->data; | |
128 | u16 control = le16_to_cpu(bar->control); | |
4203263d | 129 | u16 ssn = le16_to_cpu(bar->start_seq_num); |
9b3b43d8 ES |
130 | |
131 | tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; | |
132 | tx_cmd->tid_tspec = (control & | |
133 | IEEE80211_BAR_CTRL_TID_INFO_MASK) >> | |
134 | IEEE80211_BAR_CTRL_TID_INFO_SHIFT; | |
135 | WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); | |
4203263d EG |
136 | iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, |
137 | ssn); | |
8ca151b5 JB |
138 | } else { |
139 | tx_cmd->tid_tspec = IWL_TID_NON_QOS; | |
140 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) | |
141 | tx_flags |= TX_CMD_FLG_SEQ_CTL; | |
142 | else | |
143 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL; | |
144 | } | |
145 | ||
a9dc5060 ES |
146 | /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */ |
147 | if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) | |
148 | ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; | |
149 | else | |
150 | ac = tid_to_mac80211_ac[0]; | |
151 | ||
b797e3fb EG |
152 | tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << |
153 | TX_CMD_FLG_BT_PRIO_POS; | |
154 | ||
8ca151b5 JB |
155 | if (ieee80211_is_mgmt(fc)) { |
156 | if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) | |
b084a356 AA |
157 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); |
158 | else if (ieee80211_is_action(fc)) | |
159 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); | |
8ca151b5 | 160 | else |
b084a356 | 161 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); |
8ca151b5 JB |
162 | |
163 | /* The spec allows Action frames in A-MPDU, we don't support | |
164 | * it | |
165 | */ | |
166 | WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); | |
63f7535d | 167 | } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { |
b084a356 | 168 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); |
8ca151b5 | 169 | } else { |
b084a356 | 170 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); |
8ca151b5 JB |
171 | } |
172 | ||
8ca151b5 JB |
173 | if (ieee80211_is_data(fc) && len > mvm->rts_threshold && |
174 | !is_multicast_ether_addr(ieee80211_get_DA(hdr))) | |
175 | tx_flags |= TX_CMD_FLG_PROT_REQUIRE; | |
176 | ||
859d914c JB |
177 | if (fw_has_capa(&mvm->fw->ucode_capa, |
178 | IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && | |
f1daa00e AO |
179 | ieee80211_action_contains_tpc(skb)) |
180 | tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; | |
181 | ||
8ca151b5 JB |
182 | tx_cmd->tx_flags = cpu_to_le32(tx_flags); |
183 | /* Total # bytes to be transmitted */ | |
184 | tx_cmd->len = cpu_to_le16((u16)skb->len); | |
185 | tx_cmd->next_frame_len = 0; | |
186 | tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); | |
187 | tx_cmd->sta_id = sta_id; | |
188 | } | |
189 | ||
190 | /* | |
191 | * Sets the fields in the Tx cmd that are rate related | |
192 | */ | |
6ce73e65 AN |
193 | void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, |
194 | struct ieee80211_tx_info *info, | |
195 | struct ieee80211_sta *sta, __le16 fc) | |
8ca151b5 JB |
196 | { |
197 | u32 rate_flags; | |
198 | int rate_idx; | |
199 | u8 rate_plcp; | |
200 | ||
201 | /* Set retry limit on RTS packets */ | |
202 | tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; | |
203 | ||
204 | /* Set retry limit on DATA packets and Probe Responses*/ | |
205 | if (ieee80211_is_probe_resp(fc)) { | |
206 | tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; | |
207 | tx_cmd->rts_retry_limit = | |
208 | min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); | |
209 | } else if (ieee80211_is_back_req(fc)) { | |
210 | tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; | |
211 | } else { | |
212 | tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; | |
213 | } | |
214 | ||
215 | /* | |
e89044d7 | 216 | * for data packets, rate info comes from the table inside the fw. This |
1ffde699 | 217 | * table is controlled by LINK_QUALITY commands |
8ca151b5 JB |
218 | */ |
219 | ||
1ffde699 | 220 | if (ieee80211_is_data(fc) && sta) { |
8ca151b5 JB |
221 | tx_cmd->initial_rate_index = 0; |
222 | tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); | |
223 | return; | |
224 | } else if (ieee80211_is_back_req(fc)) { | |
2edc6ec6 EG |
225 | tx_cmd->tx_flags |= |
226 | cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); | |
8ca151b5 JB |
227 | } |
228 | ||
229 | /* HT rate doesn't make sense for a non data frame */ | |
230 | WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, | |
f85e9d19 JB |
231 | "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n", |
232 | info->control.rates[0].flags, | |
233 | info->control.rates[0].idx, | |
234 | le16_to_cpu(fc)); | |
8ca151b5 JB |
235 | |
236 | rate_idx = info->control.rates[0].idx; | |
237 | /* if the rate isn't a well known legacy rate, take the lowest one */ | |
238 | if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY) | |
239 | rate_idx = rate_lowest_index( | |
240 | &mvm->nvm_data->bands[info->band], sta); | |
241 | ||
242 | /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ | |
243 | if (info->band == IEEE80211_BAND_5GHZ) | |
244 | rate_idx += IWL_FIRST_OFDM_RATE; | |
245 | ||
246 | /* For 2.4 GHZ band, check that there is no need to remap */ | |
247 | BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); | |
248 | ||
249 | /* Get PLCP rate for tx_cmd->rate_n_flags */ | |
250 | rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); | |
251 | ||
252 | mvm->mgmt_last_antenna_idx = | |
a0544272 | 253 | iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), |
8ca151b5 | 254 | mvm->mgmt_last_antenna_idx); |
34c8b24f EG |
255 | |
256 | if (info->band == IEEE80211_BAND_2GHZ && | |
257 | !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) | |
923a8c1d | 258 | rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; |
34c8b24f EG |
259 | else |
260 | rate_flags = | |
261 | BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; | |
8ca151b5 JB |
262 | |
263 | /* Set CCK flag as needed */ | |
264 | if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) | |
265 | rate_flags |= RATE_MCS_CCK_MSK; | |
266 | ||
267 | /* Set the rate in the TX cmd */ | |
268 | tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags); | |
269 | } | |
270 | ||
271 | /* | |
272 | * Sets the fields in the Tx cmd that are crypto related | |
273 | */ | |
ca8c0f4b JB |
274 | static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, |
275 | struct ieee80211_tx_info *info, | |
276 | struct iwl_tx_cmd *tx_cmd, | |
277 | struct sk_buff *skb_frag, | |
278 | int hdrlen) | |
8ca151b5 JB |
279 | { |
280 | struct ieee80211_key_conf *keyconf = info->control.hw_key; | |
ca8c0f4b JB |
281 | u8 *crypto_hdr = skb_frag->data + hdrlen; |
282 | u64 pn; | |
8ca151b5 JB |
283 | |
284 | switch (keyconf->cipher) { | |
285 | case WLAN_CIPHER_SUITE_CCMP: | |
ca8c0f4b JB |
286 | case WLAN_CIPHER_SUITE_CCMP_256: |
287 | iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); | |
288 | pn = atomic64_inc_return(&keyconf->tx_pn); | |
289 | crypto_hdr[0] = pn; | |
290 | crypto_hdr[2] = 0; | |
291 | crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); | |
292 | crypto_hdr[1] = pn >> 8; | |
293 | crypto_hdr[4] = pn >> 16; | |
294 | crypto_hdr[5] = pn >> 24; | |
295 | crypto_hdr[6] = pn >> 32; | |
296 | crypto_hdr[7] = pn >> 40; | |
8ca151b5 JB |
297 | break; |
298 | ||
299 | case WLAN_CIPHER_SUITE_TKIP: | |
300 | tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; | |
301 | ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); | |
302 | break; | |
303 | ||
304 | case WLAN_CIPHER_SUITE_WEP104: | |
305 | tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; | |
306 | /* fall through */ | |
307 | case WLAN_CIPHER_SUITE_WEP40: | |
308 | tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | | |
309 | ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & | |
310 | TX_CMD_SEC_WEP_KEY_IDX_MSK); | |
311 | ||
312 | memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); | |
313 | break; | |
314 | default: | |
e36e5433 | 315 | tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; |
8ca151b5 JB |
316 | } |
317 | } | |
318 | ||
319 | /* | |
320 | * Allocates and sets the Tx cmd the driver data pointers in the skb | |
321 | */ | |
322 | static struct iwl_device_cmd * | |
323 | iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, | |
ca8c0f4b | 324 | int hdrlen, struct ieee80211_sta *sta, u8 sta_id) |
8ca151b5 JB |
325 | { |
326 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
327 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
328 | struct iwl_device_cmd *dev_cmd; | |
329 | struct iwl_tx_cmd *tx_cmd; | |
330 | ||
331 | dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); | |
332 | ||
333 | if (unlikely(!dev_cmd)) | |
334 | return NULL; | |
335 | ||
336 | memset(dev_cmd, 0, sizeof(*dev_cmd)); | |
3961a61a | 337 | dev_cmd->hdr.cmd = TX_CMD; |
8ca151b5 JB |
338 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; |
339 | ||
340 | if (info->control.hw_key) | |
ca8c0f4b | 341 | iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); |
8ca151b5 JB |
342 | |
343 | iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); | |
344 | ||
345 | iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); | |
346 | ||
347 | memset(&info->status, 0, sizeof(info->status)); | |
348 | ||
349 | info->driver_data[0] = NULL; | |
350 | info->driver_data[1] = dev_cmd; | |
351 | ||
352 | return dev_cmd; | |
353 | } | |
354 | ||
355 | int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) | |
356 | { | |
357 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
358 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
359 | struct iwl_device_cmd *dev_cmd; | |
360 | struct iwl_tx_cmd *tx_cmd; | |
361 | u8 sta_id; | |
ca8c0f4b | 362 | int hdrlen = ieee80211_hdrlen(hdr->frame_control); |
8ca151b5 JB |
363 | |
364 | if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU)) | |
365 | return -1; | |
366 | ||
367 | if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && | |
368 | (!info->control.vif || | |
369 | info->hw_queue != info->control.vif->cab_queue))) | |
370 | return -1; | |
371 | ||
7da91b0e AM |
372 | /* |
373 | * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used | |
374 | * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel | |
375 | * queue. STATION (HS2.0) uses the auxiliary context of the FW, | |
376 | * and hence needs to be sent on the aux queue | |
377 | */ | |
378 | if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && | |
379 | info->control.vif->type == NL80211_IFTYPE_STATION) | |
380 | IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue; | |
381 | ||
8ca151b5 | 382 | /* |
d0ab08d0 | 383 | * If the interface on which the frame is sent is the P2P_DEVICE |
8ca151b5 | 384 | * or an AP/GO interface use the broadcast station associated |
d0ab08d0 IP |
385 | * with it; otherwise if the interface is a managed interface |
386 | * use the AP station associated with it for multicast traffic | |
387 | * (this is not possible for unicast packets as a TLDS discovery | |
388 | * response are sent without a station entry); otherwise use the | |
389 | * AUX station. | |
8ca151b5 | 390 | */ |
d0ab08d0 IP |
391 | sta_id = mvm->aux_sta.sta_id; |
392 | if (info->control.vif) { | |
8ca151b5 JB |
393 | struct iwl_mvm_vif *mvmvif = |
394 | iwl_mvm_vif_from_mac80211(info->control.vif); | |
d0ab08d0 IP |
395 | |
396 | if (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE || | |
397 | info->control.vif->type == NL80211_IFTYPE_AP) | |
398 | sta_id = mvmvif->bcast_sta.sta_id; | |
399 | else if (info->control.vif->type == NL80211_IFTYPE_STATION && | |
400 | is_multicast_ether_addr(hdr->addr1)) { | |
401 | u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id); | |
402 | ||
403 | if (ap_sta_id != IWL_MVM_STATION_COUNT) | |
404 | sta_id = ap_sta_id; | |
405 | } | |
8ca151b5 JB |
406 | } |
407 | ||
408 | IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue); | |
409 | ||
ca8c0f4b | 410 | dev_cmd = iwl_mvm_set_tx_params(mvm, skb, hdrlen, NULL, sta_id); |
8ca151b5 JB |
411 | if (!dev_cmd) |
412 | return -1; | |
413 | ||
414 | /* From now on, we cannot access info->control */ | |
415 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; | |
416 | ||
417 | /* Copy MAC header from skb into command buffer */ | |
ca8c0f4b | 418 | memcpy(tx_cmd->hdr, hdr, hdrlen); |
8ca151b5 JB |
419 | |
420 | if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) { | |
421 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); | |
422 | return -1; | |
423 | } | |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
428 | /* | |
429 | * Sets the fields in the Tx cmd that are crypto related | |
430 | */ | |
431 | int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, | |
432 | struct ieee80211_sta *sta) | |
433 | { | |
434 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
435 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
436 | struct iwl_mvm_sta *mvmsta; | |
437 | struct iwl_device_cmd *dev_cmd; | |
438 | struct iwl_tx_cmd *tx_cmd; | |
439 | __le16 fc; | |
440 | u16 seq_number = 0; | |
441 | u8 tid = IWL_MAX_TID_COUNT; | |
442 | u8 txq_id = info->hw_queue; | |
443 | bool is_data_qos = false, is_ampdu = false; | |
ca8c0f4b | 444 | int hdrlen; |
8ca151b5 | 445 | |
5b577a90 | 446 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 | 447 | fc = hdr->frame_control; |
ca8c0f4b | 448 | hdrlen = ieee80211_hdrlen(fc); |
8ca151b5 JB |
449 | |
450 | if (WARN_ON_ONCE(!mvmsta)) | |
451 | return -1; | |
452 | ||
881acd89 | 453 | if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) |
8ca151b5 JB |
454 | return -1; |
455 | ||
ca8c0f4b | 456 | dev_cmd = iwl_mvm_set_tx_params(mvm, skb, hdrlen, sta, mvmsta->sta_id); |
8ca151b5 JB |
457 | if (!dev_cmd) |
458 | goto drop; | |
459 | ||
460 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; | |
461 | /* From now on, we cannot access info->control */ | |
462 | ||
3e56eadf JB |
463 | /* |
464 | * we handle that entirely ourselves -- for uAPSD the firmware | |
465 | * will always send a notification, and for PS-Poll responses | |
466 | * we'll notify mac80211 when getting frame status | |
467 | */ | |
468 | info->flags &= ~IEEE80211_TX_STATUS_EOSP; | |
469 | ||
8ca151b5 JB |
470 | spin_lock(&mvmsta->lock); |
471 | ||
472 | if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { | |
473 | u8 *qc = NULL; | |
474 | qc = ieee80211_get_qos_ctl(hdr); | |
475 | tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; | |
476 | if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) | |
477 | goto drop_unlock_sta; | |
478 | ||
479 | seq_number = mvmsta->tid_data[tid].seq_number; | |
480 | seq_number &= IEEE80211_SCTL_SEQ; | |
481 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); | |
482 | hdr->seq_ctrl |= cpu_to_le16(seq_number); | |
8ca151b5 JB |
483 | is_data_qos = true; |
484 | is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; | |
485 | } | |
486 | ||
487 | /* Copy MAC header from skb into command buffer */ | |
ca8c0f4b | 488 | memcpy(tx_cmd->hdr, hdr, hdrlen); |
8ca151b5 JB |
489 | |
490 | WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); | |
491 | ||
a0f6bf2a AN |
492 | if (sta->tdls) { |
493 | /* default to TID 0 for non-QoS packets */ | |
494 | u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid; | |
495 | ||
496 | txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]]; | |
497 | } | |
498 | ||
8ca151b5 JB |
499 | if (is_ampdu) { |
500 | if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON)) | |
501 | goto drop_unlock_sta; | |
502 | txq_id = mvmsta->tid_data[tid].txq_id; | |
503 | } | |
504 | ||
505 | IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, | |
cf9d1188 | 506 | tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); |
8ca151b5 | 507 | |
8ca151b5 JB |
508 | if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) |
509 | goto drop_unlock_sta; | |
510 | ||
511 | if (is_data_qos && !ieee80211_has_morefrags(fc)) | |
cf9d1188 | 512 | mvmsta->tid_data[tid].seq_number = seq_number + 0x10; |
8ca151b5 JB |
513 | |
514 | spin_unlock(&mvmsta->lock); | |
515 | ||
19e737c9 | 516 | if (txq_id < mvm->first_agg_queue) |
e3d4bc8c | 517 | atomic_inc(&mvm->pending_frames[mvmsta->sta_id]); |
8ca151b5 JB |
518 | |
519 | return 0; | |
520 | ||
521 | drop_unlock_sta: | |
522 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); | |
523 | spin_unlock(&mvmsta->lock); | |
524 | drop: | |
525 | return -1; | |
526 | } | |
527 | ||
528 | static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, | |
529 | struct ieee80211_sta *sta, u8 tid) | |
530 | { | |
5b577a90 | 531 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
532 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; |
533 | struct ieee80211_vif *vif = mvmsta->vif; | |
534 | ||
535 | lockdep_assert_held(&mvmsta->lock); | |
536 | ||
3e56eadf JB |
537 | if ((tid_data->state == IWL_AGG_ON || |
538 | tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && | |
539 | iwl_mvm_tid_queued(tid_data) == 0) { | |
540 | /* | |
541 | * Now that this aggregation queue is empty tell mac80211 so it | |
542 | * knows we no longer have frames buffered for the station on | |
543 | * this TID (for the TIM bitmap calculation.) | |
544 | */ | |
545 | ieee80211_sta_set_buffered(sta, tid, false); | |
546 | } | |
547 | ||
8ca151b5 JB |
548 | if (tid_data->ssn != tid_data->next_reclaimed) |
549 | return; | |
550 | ||
551 | switch (tid_data->state) { | |
552 | case IWL_EMPTYING_HW_QUEUE_ADDBA: | |
553 | IWL_DEBUG_TX_QUEUES(mvm, | |
554 | "Can continue addBA flow ssn = next_recl = %d\n", | |
555 | tid_data->next_reclaimed); | |
556 | tid_data->state = IWL_AGG_STARTING; | |
557 | ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
558 | break; | |
559 | ||
560 | case IWL_EMPTYING_HW_QUEUE_DELBA: | |
561 | IWL_DEBUG_TX_QUEUES(mvm, | |
562 | "Can continue DELBA flow ssn = next_recl = %d\n", | |
563 | tid_data->next_reclaimed); | |
4ecafae9 LK |
564 | iwl_mvm_disable_txq(mvm, tid_data->txq_id, |
565 | vif->hw_queue[tid_to_mac80211_ac[tid]], tid, | |
566 | CMD_ASYNC); | |
8ca151b5 | 567 | tid_data->state = IWL_AGG_OFF; |
8ca151b5 JB |
568 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); |
569 | break; | |
570 | ||
571 | default: | |
572 | break; | |
573 | } | |
574 | } | |
575 | ||
576 | #ifdef CONFIG_IWLWIFI_DEBUG | |
577 | const char *iwl_mvm_get_tx_fail_reason(u32 status) | |
578 | { | |
579 | #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x | |
580 | #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x | |
581 | ||
582 | switch (status & TX_STATUS_MSK) { | |
583 | case TX_STATUS_SUCCESS: | |
584 | return "SUCCESS"; | |
585 | TX_STATUS_POSTPONE(DELAY); | |
586 | TX_STATUS_POSTPONE(FEW_BYTES); | |
587 | TX_STATUS_POSTPONE(BT_PRIO); | |
588 | TX_STATUS_POSTPONE(QUIET_PERIOD); | |
589 | TX_STATUS_POSTPONE(CALC_TTAK); | |
590 | TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); | |
591 | TX_STATUS_FAIL(SHORT_LIMIT); | |
592 | TX_STATUS_FAIL(LONG_LIMIT); | |
593 | TX_STATUS_FAIL(UNDERRUN); | |
594 | TX_STATUS_FAIL(DRAIN_FLOW); | |
595 | TX_STATUS_FAIL(RFKILL_FLUSH); | |
596 | TX_STATUS_FAIL(LIFE_EXPIRE); | |
597 | TX_STATUS_FAIL(DEST_PS); | |
598 | TX_STATUS_FAIL(HOST_ABORTED); | |
599 | TX_STATUS_FAIL(BT_RETRY); | |
600 | TX_STATUS_FAIL(STA_INVALID); | |
601 | TX_STATUS_FAIL(FRAG_DROPPED); | |
602 | TX_STATUS_FAIL(TID_DISABLE); | |
603 | TX_STATUS_FAIL(FIFO_FLUSHED); | |
604 | TX_STATUS_FAIL(SMALL_CF_POLL); | |
605 | TX_STATUS_FAIL(FW_DROP); | |
606 | TX_STATUS_FAIL(STA_COLOR_MISMATCH); | |
607 | } | |
608 | ||
609 | return "UNKNOWN"; | |
610 | ||
611 | #undef TX_STATUS_FAIL | |
612 | #undef TX_STATUS_POSTPONE | |
613 | } | |
614 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
615 | ||
d310e405 ES |
616 | void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, |
617 | enum ieee80211_band band, | |
618 | struct ieee80211_tx_rate *r) | |
8ca151b5 | 619 | { |
8ca151b5 JB |
620 | if (rate_n_flags & RATE_HT_MCS_GF_MSK) |
621 | r->flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
622 | switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { | |
623 | case RATE_MCS_CHAN_WIDTH_20: | |
624 | break; | |
625 | case RATE_MCS_CHAN_WIDTH_40: | |
626 | r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; | |
627 | break; | |
628 | case RATE_MCS_CHAN_WIDTH_80: | |
629 | r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; | |
630 | break; | |
631 | case RATE_MCS_CHAN_WIDTH_160: | |
632 | r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; | |
633 | break; | |
634 | } | |
635 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
636 | r->flags |= IEEE80211_TX_RC_SHORT_GI; | |
637 | if (rate_n_flags & RATE_MCS_HT_MSK) { | |
638 | r->flags |= IEEE80211_TX_RC_MCS; | |
639 | r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; | |
640 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { | |
641 | ieee80211_rate_set_vht( | |
642 | r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, | |
643 | ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> | |
644 | RATE_VHT_MCS_NSS_POS) + 1); | |
645 | r->flags |= IEEE80211_TX_RC_VHT_MCS; | |
646 | } else { | |
647 | r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, | |
d310e405 | 648 | band); |
8ca151b5 JB |
649 | } |
650 | } | |
651 | ||
d310e405 ES |
652 | /** |
653 | * translate ucode response to mac80211 tx status control values | |
654 | */ | |
655 | static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, | |
656 | struct ieee80211_tx_info *info) | |
657 | { | |
658 | struct ieee80211_tx_rate *r = &info->status.rates[0]; | |
659 | ||
660 | info->status.antenna = | |
661 | ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); | |
662 | iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); | |
663 | } | |
664 | ||
8ca151b5 JB |
665 | static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, |
666 | struct iwl_rx_packet *pkt) | |
667 | { | |
668 | struct ieee80211_sta *sta; | |
669 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
670 | int txq_id = SEQ_TO_QUEUE(sequence); | |
671 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
672 | int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); | |
673 | int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); | |
674 | u32 status = le16_to_cpu(tx_resp->status.status); | |
675 | u16 ssn = iwl_mvm_get_scd_ssn(tx_resp); | |
676 | struct iwl_mvm_sta *mvmsta; | |
677 | struct sk_buff_head skbs; | |
678 | u8 skb_freed = 0; | |
679 | u16 next_reclaimed, seq_ctl; | |
680 | ||
681 | __skb_queue_head_init(&skbs); | |
682 | ||
683 | seq_ctl = le16_to_cpu(tx_resp->seq_ctl); | |
684 | ||
685 | /* we can free until ssn % q.n_bd not inclusive */ | |
686 | iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); | |
687 | ||
688 | while (!skb_queue_empty(&skbs)) { | |
689 | struct sk_buff *skb = __skb_dequeue(&skbs); | |
690 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
691 | ||
692 | skb_freed++; | |
693 | ||
694 | iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); | |
695 | ||
696 | memset(&info->status, 0, sizeof(info->status)); | |
697 | ||
698 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; | |
699 | ||
700 | /* inform mac80211 about what happened with the frame */ | |
701 | switch (status & TX_STATUS_MSK) { | |
702 | case TX_STATUS_SUCCESS: | |
703 | case TX_STATUS_DIRECT_DONE: | |
704 | info->flags |= IEEE80211_TX_STAT_ACK; | |
705 | break; | |
706 | case TX_STATUS_FAIL_DEST_PS: | |
707 | info->flags |= IEEE80211_TX_STAT_TX_FILTERED; | |
708 | break; | |
709 | default: | |
710 | break; | |
711 | } | |
712 | ||
713 | info->status.rates[0].count = tx_resp->failure_frame + 1; | |
d310e405 ES |
714 | iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), |
715 | info); | |
929e6ede ES |
716 | info->status.status_driver_data[1] = |
717 | (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); | |
8ca151b5 JB |
718 | |
719 | /* Single frame failure in an AMPDU queue => send BAR */ | |
19e737c9 | 720 | if (txq_id >= mvm->first_agg_queue && |
9ce578a5 ES |
721 | !(info->flags & IEEE80211_TX_STAT_ACK) && |
722 | !(info->flags & IEEE80211_TX_STAT_TX_FILTERED)) | |
8ca151b5 | 723 | info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; |
8ca151b5 | 724 | |
ebea2f32 EG |
725 | /* W/A FW bug: seq_ctl is wrong when the status isn't success */ |
726 | if (status != TX_STATUS_SUCCESS) { | |
8ca151b5 JB |
727 | struct ieee80211_hdr *hdr = (void *)skb->data; |
728 | seq_ctl = le16_to_cpu(hdr->seq_ctrl); | |
729 | } | |
730 | ||
9b5452fd EG |
731 | /* |
732 | * TODO: this is not accurate if we are freeing more than one | |
733 | * packet. | |
734 | */ | |
735 | info->status.tx_time = | |
736 | le16_to_cpu(tx_resp->wireless_media_time); | |
3a84b69e EP |
737 | BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); |
738 | info->status.status_driver_data[0] = | |
739 | (void *)(uintptr_t)tx_resp->reduced_tpc; | |
740 | ||
f14d6b39 | 741 | ieee80211_tx_status(mvm->hw, skb); |
8ca151b5 JB |
742 | } |
743 | ||
19e737c9 | 744 | if (txq_id >= mvm->first_agg_queue) { |
8ca151b5 JB |
745 | /* If this is an aggregation queue, we use the ssn since: |
746 | * ssn = wifi seq_num % 256. | |
747 | * The seq_ctl is the sequence control of the packet to which | |
748 | * this Tx response relates. But if there is a hole in the | |
749 | * bitmap of the BA we received, this Tx response may allow to | |
750 | * reclaim the hole and all the subsequent packets that were | |
751 | * already acked. In that case, seq_ctl != ssn, and the next | |
752 | * packet to be reclaimed will be ssn and not seq_ctl. In that | |
753 | * case, several packets will be reclaimed even if | |
754 | * frame_count = 1. | |
755 | * | |
756 | * The ssn is the index (% 256) of the latest packet that has | |
757 | * treated (acked / dropped) + 1. | |
758 | */ | |
759 | next_reclaimed = ssn; | |
760 | } else { | |
761 | /* The next packet to be reclaimed is the one after this one */ | |
9a886586 | 762 | next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10); |
8ca151b5 JB |
763 | } |
764 | ||
765 | IWL_DEBUG_TX_REPLY(mvm, | |
8c6e83d6 EG |
766 | "TXQ %d status %s (0x%08x)\n", |
767 | txq_id, iwl_mvm_get_tx_fail_reason(status), status); | |
768 | ||
769 | IWL_DEBUG_TX_REPLY(mvm, | |
770 | "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", | |
771 | le32_to_cpu(tx_resp->initial_rate), | |
8ca151b5 JB |
772 | tx_resp->failure_frame, SEQ_TO_INDEX(sequence), |
773 | ssn, next_reclaimed, seq_ctl); | |
774 | ||
775 | rcu_read_lock(); | |
776 | ||
777 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
9bb0c1ad EG |
778 | /* |
779 | * sta can't be NULL otherwise it'd mean that the sta has been freed in | |
780 | * the firmware while we still have packets for it in the Tx queues. | |
781 | */ | |
782 | if (WARN_ON_ONCE(!sta)) | |
783 | goto out; | |
8ca151b5 | 784 | |
9bb0c1ad | 785 | if (!IS_ERR(sta)) { |
5b577a90 | 786 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
787 | |
788 | if (tid != IWL_TID_NON_QOS) { | |
789 | struct iwl_mvm_tid_data *tid_data = | |
790 | &mvmsta->tid_data[tid]; | |
36be0eb6 | 791 | bool send_eosp_ndp = false; |
8ca151b5 | 792 | |
2bfb5092 | 793 | spin_lock_bh(&mvmsta->lock); |
8ca151b5 JB |
794 | tid_data->next_reclaimed = next_reclaimed; |
795 | IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n", | |
796 | next_reclaimed); | |
797 | iwl_mvm_check_ratid_empty(mvm, sta, tid); | |
36be0eb6 EG |
798 | |
799 | if (mvmsta->sleep_tx_count) { | |
800 | mvmsta->sleep_tx_count--; | |
801 | if (mvmsta->sleep_tx_count && | |
802 | !iwl_mvm_tid_queued(tid_data)) { | |
803 | /* | |
804 | * The number of frames in the queue | |
805 | * dropped to 0 even if we sent less | |
806 | * frames than we thought we had on the | |
807 | * Tx queue. | |
808 | * This means we had holes in the BA | |
809 | * window that we just filled, ask | |
810 | * mac80211 to send EOSP since the | |
811 | * firmware won't know how to do that. | |
812 | * Send NDP and the firmware will send | |
813 | * EOSP notification that will trigger | |
814 | * a call to ieee80211_sta_eosp(). | |
815 | */ | |
816 | send_eosp_ndp = true; | |
817 | } | |
818 | } | |
819 | ||
2bfb5092 | 820 | spin_unlock_bh(&mvmsta->lock); |
36be0eb6 EG |
821 | if (send_eosp_ndp) { |
822 | iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, | |
823 | IEEE80211_FRAME_RELEASE_UAPSD, | |
824 | 1, tid, false, false); | |
825 | mvmsta->sleep_tx_count = 0; | |
826 | ieee80211_send_eosp_nullfunc(sta, tid); | |
827 | } | |
8ca151b5 | 828 | } |
3e56eadf JB |
829 | |
830 | if (mvmsta->next_status_eosp) { | |
831 | mvmsta->next_status_eosp = false; | |
832 | ieee80211_sta_eosp(sta); | |
833 | } | |
8ca151b5 | 834 | } else { |
8ca151b5 JB |
835 | mvmsta = NULL; |
836 | } | |
837 | ||
838 | /* | |
839 | * If the txq is not an AMPDU queue, there is no chance we freed | |
840 | * several skbs. Check that out... | |
8ca151b5 | 841 | */ |
9bb0c1ad EG |
842 | if (txq_id >= mvm->first_agg_queue) |
843 | goto out; | |
844 | ||
845 | /* We can't free more than one frame at once on a shared queue */ | |
846 | WARN_ON(skb_freed > 1); | |
847 | ||
589a6ba4 | 848 | /* If we have still frames for this STA nothing to do here */ |
9bb0c1ad EG |
849 | if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) |
850 | goto out; | |
851 | ||
852 | if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) { | |
003e5236 | 853 | |
9bb0c1ad | 854 | /* |
003e5236 AO |
855 | * If there are no pending frames for this STA and |
856 | * the tx to this station is not disabled, notify | |
857 | * mac80211 that this station can now wake up in its | |
9bb0c1ad EG |
858 | * STA table. |
859 | * If mvmsta is not NULL, sta is valid. | |
860 | */ | |
003e5236 AO |
861 | |
862 | spin_lock_bh(&mvmsta->lock); | |
863 | ||
864 | if (!mvmsta->disable_tx) | |
865 | ieee80211_sta_block_awake(mvm->hw, sta, false); | |
866 | ||
867 | spin_unlock_bh(&mvmsta->lock); | |
9bb0c1ad EG |
868 | } |
869 | ||
870 | if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) { | |
871 | /* | |
872 | * We are draining and this was the last packet - pre_rcu_remove | |
873 | * has been called already. We might be after the | |
874 | * synchronize_net already. | |
875 | * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues. | |
876 | */ | |
877 | set_bit(sta_id, mvm->sta_drained); | |
878 | schedule_work(&mvm->sta_drained_wk); | |
8ca151b5 JB |
879 | } |
880 | ||
9bb0c1ad | 881 | out: |
8ca151b5 JB |
882 | rcu_read_unlock(); |
883 | } | |
884 | ||
885 | #ifdef CONFIG_IWLWIFI_DEBUG | |
886 | #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x | |
887 | static const char *iwl_get_agg_tx_status(u16 status) | |
888 | { | |
889 | switch (status & AGG_TX_STATE_STATUS_MSK) { | |
890 | AGG_TX_STATE_(TRANSMITTED); | |
891 | AGG_TX_STATE_(UNDERRUN); | |
892 | AGG_TX_STATE_(BT_PRIO); | |
893 | AGG_TX_STATE_(FEW_BYTES); | |
894 | AGG_TX_STATE_(ABORT); | |
895 | AGG_TX_STATE_(LAST_SENT_TTL); | |
896 | AGG_TX_STATE_(LAST_SENT_TRY_CNT); | |
897 | AGG_TX_STATE_(LAST_SENT_BT_KILL); | |
898 | AGG_TX_STATE_(SCD_QUERY); | |
899 | AGG_TX_STATE_(TEST_BAD_CRC32); | |
900 | AGG_TX_STATE_(RESPONSE); | |
901 | AGG_TX_STATE_(DUMP_TX); | |
902 | AGG_TX_STATE_(DELAY_TX); | |
903 | } | |
904 | ||
905 | return "UNKNOWN"; | |
906 | } | |
907 | ||
908 | static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, | |
909 | struct iwl_rx_packet *pkt) | |
910 | { | |
911 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
912 | struct agg_tx_status *frame_status = &tx_resp->status; | |
913 | int i; | |
914 | ||
915 | for (i = 0; i < tx_resp->frame_count; i++) { | |
916 | u16 fstatus = le16_to_cpu(frame_status[i].status); | |
917 | ||
918 | IWL_DEBUG_TX_REPLY(mvm, | |
919 | "status %s (0x%04x), try-count (%d) seq (0x%x)\n", | |
920 | iwl_get_agg_tx_status(fstatus), | |
921 | fstatus & AGG_TX_STATE_STATUS_MSK, | |
922 | (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> | |
923 | AGG_TX_STATE_TRY_CNT_POS, | |
924 | le16_to_cpu(frame_status[i].sequence)); | |
925 | } | |
926 | } | |
927 | #else | |
928 | static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, | |
929 | struct iwl_rx_packet *pkt) | |
930 | {} | |
931 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
932 | ||
933 | static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, | |
934 | struct iwl_rx_packet *pkt) | |
935 | { | |
936 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
937 | int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); | |
938 | int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); | |
939 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
940 | struct ieee80211_sta *sta; | |
941 | ||
19e737c9 | 942 | if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue)) |
8ca151b5 JB |
943 | return; |
944 | ||
945 | if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) | |
946 | return; | |
947 | ||
948 | iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); | |
949 | ||
950 | rcu_read_lock(); | |
951 | ||
952 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
953 | ||
954 | if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { | |
5b577a90 | 955 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
956 | mvmsta->tid_data[tid].rate_n_flags = |
957 | le32_to_cpu(tx_resp->initial_rate); | |
3a84b69e | 958 | mvmsta->tid_data[tid].reduced_tpc = tx_resp->reduced_tpc; |
9b5452fd EG |
959 | mvmsta->tid_data[tid].tx_time = |
960 | le16_to_cpu(tx_resp->wireless_media_time); | |
8ca151b5 JB |
961 | } |
962 | ||
963 | rcu_read_unlock(); | |
964 | } | |
965 | ||
0416841d | 966 | void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
8ca151b5 JB |
967 | { |
968 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
969 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
970 | ||
971 | if (tx_resp->frame_count == 1) | |
972 | iwl_mvm_rx_tx_cmd_single(mvm, pkt); | |
973 | else | |
974 | iwl_mvm_rx_tx_cmd_agg(mvm, pkt); | |
8ca151b5 JB |
975 | } |
976 | ||
a7130442 ES |
977 | static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info, |
978 | struct iwl_mvm_ba_notif *ba_notif, | |
979 | struct iwl_mvm_tid_data *tid_data) | |
980 | { | |
981 | info->flags |= IEEE80211_TX_STAT_AMPDU; | |
982 | info->status.ampdu_ack_len = ba_notif->txed_2_done; | |
983 | info->status.ampdu_len = ba_notif->txed; | |
984 | iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags, | |
985 | info); | |
9b5452fd EG |
986 | /* TODO: not accounted if the whole A-MPDU failed */ |
987 | info->status.tx_time = tid_data->tx_time; | |
a7130442 ES |
988 | info->status.status_driver_data[0] = |
989 | (void *)(uintptr_t)tid_data->reduced_tpc; | |
929e6ede ES |
990 | info->status.status_driver_data[1] = |
991 | (void *)(uintptr_t)tid_data->rate_n_flags; | |
a7130442 ES |
992 | } |
993 | ||
0416841d | 994 | void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
8ca151b5 JB |
995 | { |
996 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
997 | struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data; | |
998 | struct sk_buff_head reclaimed_skbs; | |
999 | struct iwl_mvm_tid_data *tid_data; | |
8ca151b5 JB |
1000 | struct ieee80211_sta *sta; |
1001 | struct iwl_mvm_sta *mvmsta; | |
8ca151b5 JB |
1002 | struct sk_buff *skb; |
1003 | int sta_id, tid, freed; | |
8ca151b5 JB |
1004 | /* "flow" corresponds to Tx queue */ |
1005 | u16 scd_flow = le16_to_cpu(ba_notif->scd_flow); | |
8ca151b5 JB |
1006 | /* "ssn" is start of block-ack Tx window, corresponds to index |
1007 | * (in Tx queue's circular buffer) of first TFD/frame in window */ | |
1008 | u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn); | |
1009 | ||
1010 | sta_id = ba_notif->sta_id; | |
1011 | tid = ba_notif->tid; | |
1012 | ||
2cee4762 ES |
1013 | if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || |
1014 | tid >= IWL_MAX_TID_COUNT, | |
1015 | "sta_id %d tid %d", sta_id, tid)) | |
0416841d | 1016 | return; |
2cee4762 | 1017 | |
8ca151b5 JB |
1018 | rcu_read_lock(); |
1019 | ||
1020 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
1021 | ||
1022 | /* Reclaiming frames for a station that has been deleted ? */ | |
1023 | if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { | |
1024 | rcu_read_unlock(); | |
0416841d | 1025 | return; |
8ca151b5 JB |
1026 | } |
1027 | ||
5b577a90 | 1028 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
1029 | tid_data = &mvmsta->tid_data[tid]; |
1030 | ||
1f16ea29 JB |
1031 | if (tid_data->txq_id != scd_flow) { |
1032 | IWL_ERR(mvm, | |
1033 | "invalid BA notification: Q %d, tid %d, flow %d\n", | |
1034 | tid_data->txq_id, tid, scd_flow); | |
8ca151b5 | 1035 | rcu_read_unlock(); |
0416841d | 1036 | return; |
8ca151b5 JB |
1037 | } |
1038 | ||
2bfb5092 | 1039 | spin_lock_bh(&mvmsta->lock); |
8ca151b5 JB |
1040 | |
1041 | __skb_queue_head_init(&reclaimed_skbs); | |
1042 | ||
1043 | /* | |
1044 | * Release all TFDs before the SSN, i.e. all TFDs in front of | |
1045 | * block-ack window (we assume that they've been successfully | |
1046 | * transmitted ... if not, it's too late anyway). | |
1047 | */ | |
1048 | iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn, | |
1049 | &reclaimed_skbs); | |
1050 | ||
1051 | IWL_DEBUG_TX_REPLY(mvm, | |
1052 | "BA_NOTIFICATION Received from %pM, sta_id = %d\n", | |
1053 | (u8 *)&ba_notif->sta_addr_lo32, | |
1054 | ba_notif->sta_id); | |
1055 | IWL_DEBUG_TX_REPLY(mvm, | |
1056 | "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", | |
1057 | ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), | |
1058 | (unsigned long long)le64_to_cpu(ba_notif->bitmap), | |
1059 | scd_flow, ba_resp_scd_ssn, ba_notif->txed, | |
1060 | ba_notif->txed_2_done); | |
1061 | ||
1062 | tid_data->next_reclaimed = ba_resp_scd_ssn; | |
1063 | ||
1064 | iwl_mvm_check_ratid_empty(mvm, sta, tid); | |
1065 | ||
1066 | freed = 0; | |
1067 | ||
1068 | skb_queue_walk(&reclaimed_skbs, skb) { | |
143582c6 JB |
1069 | struct ieee80211_hdr *hdr = (void *)skb->data; |
1070 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
8ca151b5 JB |
1071 | |
1072 | if (ieee80211_is_data_qos(hdr->frame_control)) | |
1073 | freed++; | |
1074 | else | |
1075 | WARN_ON_ONCE(1); | |
1076 | ||
8ca151b5 JB |
1077 | iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); |
1078 | ||
143582c6 JB |
1079 | memset(&info->status, 0, sizeof(info->status)); |
1080 | /* Packet was transmitted successfully, failures come as single | |
1081 | * frames because before failing a frame the firmware transmits | |
1082 | * it without aggregation at least once. | |
1083 | */ | |
1084 | info->flags |= IEEE80211_TX_STAT_ACK; | |
1085 | ||
a7130442 ES |
1086 | /* this is the first skb we deliver in this batch */ |
1087 | /* put the rate scaling data there */ | |
1088 | if (freed == 1) | |
1089 | iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data); | |
8ca151b5 JB |
1090 | } |
1091 | ||
2bfb5092 | 1092 | spin_unlock_bh(&mvmsta->lock); |
8ca151b5 | 1093 | |
a7130442 ES |
1094 | /* We got a BA notif with 0 acked or scd_ssn didn't progress which is |
1095 | * possible (i.e. first MPDU in the aggregation wasn't acked) | |
1096 | * Still it's important to update RS about sent vs. acked. | |
1097 | */ | |
1098 | if (skb_queue_empty(&reclaimed_skbs)) { | |
1099 | struct ieee80211_tx_info ba_info = {}; | |
1100 | struct ieee80211_chanctx_conf *chanctx_conf = NULL; | |
1101 | ||
1102 | if (mvmsta->vif) | |
1103 | chanctx_conf = | |
1104 | rcu_dereference(mvmsta->vif->chanctx_conf); | |
1105 | ||
1106 | if (WARN_ON_ONCE(!chanctx_conf)) | |
1107 | goto out; | |
1108 | ||
1109 | ba_info.band = chanctx_conf->def.chan->band; | |
1110 | iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data); | |
1111 | ||
1112 | IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); | |
1113 | iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info); | |
1114 | } | |
1115 | ||
1116 | out: | |
8ca151b5 JB |
1117 | rcu_read_unlock(); |
1118 | ||
1119 | while (!skb_queue_empty(&reclaimed_skbs)) { | |
1120 | skb = __skb_dequeue(&reclaimed_skbs); | |
f14d6b39 | 1121 | ieee80211_tx_status(mvm->hw, skb); |
8ca151b5 | 1122 | } |
8ca151b5 JB |
1123 | } |
1124 | ||
fe92e32a EG |
1125 | /* |
1126 | * Note that there are transports that buffer frames before they reach | |
1127 | * the firmware. This means that after flush_tx_path is called, the | |
1128 | * queue might not be empty. The race-free way to handle this is to: | |
1129 | * 1) set the station as draining | |
1130 | * 2) flush the Tx path | |
1131 | * 3) wait for the transport queues to be empty | |
1132 | */ | |
5888a40c | 1133 | int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) |
8ca151b5 JB |
1134 | { |
1135 | int ret; | |
1136 | struct iwl_tx_path_flush_cmd flush_cmd = { | |
1137 | .queues_ctl = cpu_to_le32(tfd_msk), | |
1138 | .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), | |
1139 | }; | |
1140 | ||
8ca151b5 JB |
1141 | ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, |
1142 | sizeof(flush_cmd), &flush_cmd); | |
1143 | if (ret) | |
1144 | IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); | |
1145 | return ret; | |
1146 | } |