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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> | |
a3713f8b | 67 | #include <linux/tcp.h> |
8ca151b5 JB |
68 | |
69 | #include "iwl-trans.h" | |
70 | #include "iwl-eeprom-parse.h" | |
71 | #include "mvm.h" | |
72 | #include "sta.h" | |
2f89a5d7 | 73 | #include "fw-dbg.h" |
8ca151b5 | 74 | |
4203263d EG |
75 | static void |
76 | iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, | |
77 | u16 tid, u16 ssn) | |
78 | { | |
79 | struct iwl_fw_dbg_trigger_tlv *trig; | |
80 | struct iwl_fw_dbg_trigger_ba *ba_trig; | |
81 | ||
82 | if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA)) | |
83 | return; | |
84 | ||
85 | trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA); | |
86 | ba_trig = (void *)trig->data; | |
87 | ||
88 | if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) | |
89 | return; | |
90 | ||
91 | if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) | |
92 | return; | |
93 | ||
94 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, | |
95 | "BAR sent to %pM, tid %d, ssn %d", | |
96 | addr, tid, ssn); | |
97 | } | |
98 | ||
8ca151b5 JB |
99 | /* |
100 | * Sets most of the Tx cmd's fields | |
101 | */ | |
6ce73e65 AN |
102 | void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, |
103 | struct iwl_tx_cmd *tx_cmd, | |
104 | struct ieee80211_tx_info *info, u8 sta_id) | |
8ca151b5 JB |
105 | { |
106 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
107 | __le16 fc = hdr->frame_control; | |
108 | u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); | |
109 | u32 len = skb->len + FCS_LEN; | |
b797e3fb | 110 | u8 ac; |
8ca151b5 JB |
111 | |
112 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
113 | tx_flags |= TX_CMD_FLG_ACK; | |
114 | else | |
115 | tx_flags &= ~TX_CMD_FLG_ACK; | |
116 | ||
117 | if (ieee80211_is_probe_resp(fc)) | |
118 | tx_flags |= TX_CMD_FLG_TSF; | |
8ca151b5 | 119 | |
8ca151b5 JB |
120 | if (ieee80211_has_morefrags(fc)) |
121 | tx_flags |= TX_CMD_FLG_MORE_FRAG; | |
122 | ||
123 | if (ieee80211_is_data_qos(fc)) { | |
124 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
125 | tx_cmd->tid_tspec = qc[0] & 0xf; | |
126 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL; | |
9b3b43d8 ES |
127 | } else if (ieee80211_is_back_req(fc)) { |
128 | struct ieee80211_bar *bar = (void *)skb->data; | |
129 | u16 control = le16_to_cpu(bar->control); | |
4203263d | 130 | u16 ssn = le16_to_cpu(bar->start_seq_num); |
9b3b43d8 ES |
131 | |
132 | tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; | |
133 | tx_cmd->tid_tspec = (control & | |
134 | IEEE80211_BAR_CTRL_TID_INFO_MASK) >> | |
135 | IEEE80211_BAR_CTRL_TID_INFO_SHIFT; | |
136 | WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); | |
4203263d EG |
137 | iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, |
138 | ssn); | |
8ca151b5 JB |
139 | } else { |
140 | tx_cmd->tid_tspec = IWL_TID_NON_QOS; | |
141 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) | |
142 | tx_flags |= TX_CMD_FLG_SEQ_CTL; | |
143 | else | |
144 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL; | |
145 | } | |
146 | ||
a9dc5060 ES |
147 | /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */ |
148 | if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) | |
149 | ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; | |
150 | else | |
151 | ac = tid_to_mac80211_ac[0]; | |
152 | ||
b797e3fb EG |
153 | tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << |
154 | TX_CMD_FLG_BT_PRIO_POS; | |
155 | ||
8ca151b5 JB |
156 | if (ieee80211_is_mgmt(fc)) { |
157 | if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) | |
b084a356 AA |
158 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); |
159 | else if (ieee80211_is_action(fc)) | |
160 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); | |
8ca151b5 | 161 | else |
b084a356 | 162 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); |
8ca151b5 JB |
163 | |
164 | /* The spec allows Action frames in A-MPDU, we don't support | |
165 | * it | |
166 | */ | |
167 | WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); | |
63f7535d | 168 | } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { |
b084a356 | 169 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); |
8ca151b5 | 170 | } else { |
b084a356 | 171 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); |
8ca151b5 JB |
172 | } |
173 | ||
8ca151b5 JB |
174 | if (ieee80211_is_data(fc) && len > mvm->rts_threshold && |
175 | !is_multicast_ether_addr(ieee80211_get_DA(hdr))) | |
176 | tx_flags |= TX_CMD_FLG_PROT_REQUIRE; | |
177 | ||
859d914c JB |
178 | if (fw_has_capa(&mvm->fw->ucode_capa, |
179 | IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && | |
f1daa00e AO |
180 | ieee80211_action_contains_tpc(skb)) |
181 | tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; | |
182 | ||
8ca151b5 JB |
183 | tx_cmd->tx_flags = cpu_to_le32(tx_flags); |
184 | /* Total # bytes to be transmitted */ | |
185 | tx_cmd->len = cpu_to_le16((u16)skb->len); | |
186 | tx_cmd->next_frame_len = 0; | |
187 | tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); | |
188 | tx_cmd->sta_id = sta_id; | |
189 | } | |
190 | ||
191 | /* | |
192 | * Sets the fields in the Tx cmd that are rate related | |
193 | */ | |
6ce73e65 AN |
194 | void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, |
195 | struct ieee80211_tx_info *info, | |
196 | struct ieee80211_sta *sta, __le16 fc) | |
8ca151b5 JB |
197 | { |
198 | u32 rate_flags; | |
199 | int rate_idx; | |
200 | u8 rate_plcp; | |
201 | ||
202 | /* Set retry limit on RTS packets */ | |
203 | tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; | |
204 | ||
205 | /* Set retry limit on DATA packets and Probe Responses*/ | |
206 | if (ieee80211_is_probe_resp(fc)) { | |
207 | tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; | |
208 | tx_cmd->rts_retry_limit = | |
209 | min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); | |
210 | } else if (ieee80211_is_back_req(fc)) { | |
211 | tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; | |
212 | } else { | |
213 | tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; | |
214 | } | |
215 | ||
216 | /* | |
e89044d7 | 217 | * for data packets, rate info comes from the table inside the fw. This |
1ffde699 | 218 | * table is controlled by LINK_QUALITY commands |
8ca151b5 JB |
219 | */ |
220 | ||
1ffde699 | 221 | if (ieee80211_is_data(fc) && sta) { |
8ca151b5 JB |
222 | tx_cmd->initial_rate_index = 0; |
223 | tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); | |
224 | return; | |
225 | } else if (ieee80211_is_back_req(fc)) { | |
2edc6ec6 EG |
226 | tx_cmd->tx_flags |= |
227 | cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); | |
8ca151b5 JB |
228 | } |
229 | ||
230 | /* HT rate doesn't make sense for a non data frame */ | |
231 | WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, | |
f85e9d19 JB |
232 | "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n", |
233 | info->control.rates[0].flags, | |
234 | info->control.rates[0].idx, | |
235 | le16_to_cpu(fc)); | |
8ca151b5 JB |
236 | |
237 | rate_idx = info->control.rates[0].idx; | |
238 | /* if the rate isn't a well known legacy rate, take the lowest one */ | |
239 | if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY) | |
240 | rate_idx = rate_lowest_index( | |
241 | &mvm->nvm_data->bands[info->band], sta); | |
242 | ||
243 | /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ | |
244 | if (info->band == IEEE80211_BAND_5GHZ) | |
245 | rate_idx += IWL_FIRST_OFDM_RATE; | |
246 | ||
247 | /* For 2.4 GHZ band, check that there is no need to remap */ | |
248 | BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); | |
249 | ||
250 | /* Get PLCP rate for tx_cmd->rate_n_flags */ | |
251 | rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); | |
252 | ||
253 | mvm->mgmt_last_antenna_idx = | |
a0544272 | 254 | iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), |
8ca151b5 | 255 | mvm->mgmt_last_antenna_idx); |
34c8b24f EG |
256 | |
257 | if (info->band == IEEE80211_BAND_2GHZ && | |
258 | !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) | |
923a8c1d | 259 | rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; |
34c8b24f EG |
260 | else |
261 | rate_flags = | |
262 | BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; | |
8ca151b5 JB |
263 | |
264 | /* Set CCK flag as needed */ | |
265 | if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) | |
266 | rate_flags |= RATE_MCS_CCK_MSK; | |
267 | ||
268 | /* Set the rate in the TX cmd */ | |
269 | tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags); | |
270 | } | |
271 | ||
272 | /* | |
273 | * Sets the fields in the Tx cmd that are crypto related | |
274 | */ | |
ca8c0f4b JB |
275 | static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, |
276 | struct ieee80211_tx_info *info, | |
277 | struct iwl_tx_cmd *tx_cmd, | |
278 | struct sk_buff *skb_frag, | |
279 | int hdrlen) | |
8ca151b5 JB |
280 | { |
281 | struct ieee80211_key_conf *keyconf = info->control.hw_key; | |
ca8c0f4b JB |
282 | u8 *crypto_hdr = skb_frag->data + hdrlen; |
283 | u64 pn; | |
8ca151b5 JB |
284 | |
285 | switch (keyconf->cipher) { | |
286 | case WLAN_CIPHER_SUITE_CCMP: | |
ca8c0f4b JB |
287 | case WLAN_CIPHER_SUITE_CCMP_256: |
288 | iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); | |
289 | pn = atomic64_inc_return(&keyconf->tx_pn); | |
290 | crypto_hdr[0] = pn; | |
291 | crypto_hdr[2] = 0; | |
292 | crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); | |
293 | crypto_hdr[1] = pn >> 8; | |
294 | crypto_hdr[4] = pn >> 16; | |
295 | crypto_hdr[5] = pn >> 24; | |
296 | crypto_hdr[6] = pn >> 32; | |
297 | crypto_hdr[7] = pn >> 40; | |
8ca151b5 JB |
298 | break; |
299 | ||
300 | case WLAN_CIPHER_SUITE_TKIP: | |
301 | tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; | |
1ad4f639 EP |
302 | pn = atomic64_inc_return(&keyconf->tx_pn); |
303 | ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); | |
8ca151b5 JB |
304 | ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); |
305 | break; | |
306 | ||
307 | case WLAN_CIPHER_SUITE_WEP104: | |
308 | tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; | |
309 | /* fall through */ | |
310 | case WLAN_CIPHER_SUITE_WEP40: | |
311 | tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | | |
312 | ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & | |
313 | TX_CMD_SEC_WEP_KEY_IDX_MSK); | |
314 | ||
315 | memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); | |
316 | break; | |
317 | default: | |
e36e5433 | 318 | tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; |
8ca151b5 JB |
319 | } |
320 | } | |
321 | ||
322 | /* | |
323 | * Allocates and sets the Tx cmd the driver data pointers in the skb | |
324 | */ | |
325 | static struct iwl_device_cmd * | |
326 | iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, | |
ca8c0f4b | 327 | int hdrlen, struct ieee80211_sta *sta, u8 sta_id) |
8ca151b5 JB |
328 | { |
329 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
330 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
331 | struct iwl_device_cmd *dev_cmd; | |
332 | struct iwl_tx_cmd *tx_cmd; | |
333 | ||
334 | dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); | |
335 | ||
336 | if (unlikely(!dev_cmd)) | |
337 | return NULL; | |
338 | ||
339 | memset(dev_cmd, 0, sizeof(*dev_cmd)); | |
3961a61a | 340 | dev_cmd->hdr.cmd = TX_CMD; |
8ca151b5 JB |
341 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; |
342 | ||
343 | if (info->control.hw_key) | |
ca8c0f4b | 344 | iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); |
8ca151b5 JB |
345 | |
346 | iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); | |
347 | ||
348 | iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); | |
349 | ||
350 | memset(&info->status, 0, sizeof(info->status)); | |
3f73b8ca | 351 | memset(info->driver_data, 0, sizeof(info->driver_data)); |
8ca151b5 | 352 | |
8ca151b5 JB |
353 | info->driver_data[1] = dev_cmd; |
354 | ||
355 | return dev_cmd; | |
356 | } | |
357 | ||
358 | int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) | |
359 | { | |
360 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
361 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
362 | struct iwl_device_cmd *dev_cmd; | |
363 | struct iwl_tx_cmd *tx_cmd; | |
364 | u8 sta_id; | |
ca8c0f4b | 365 | int hdrlen = ieee80211_hdrlen(hdr->frame_control); |
8ca151b5 JB |
366 | |
367 | if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU)) | |
368 | return -1; | |
369 | ||
370 | if (WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && | |
371 | (!info->control.vif || | |
372 | info->hw_queue != info->control.vif->cab_queue))) | |
373 | return -1; | |
374 | ||
7da91b0e AM |
375 | /* |
376 | * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used | |
377 | * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel | |
378 | * queue. STATION (HS2.0) uses the auxiliary context of the FW, | |
379 | * and hence needs to be sent on the aux queue | |
380 | */ | |
381 | if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && | |
382 | info->control.vif->type == NL80211_IFTYPE_STATION) | |
383 | IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue; | |
384 | ||
8ca151b5 | 385 | /* |
d0ab08d0 | 386 | * If the interface on which the frame is sent is the P2P_DEVICE |
8ca151b5 | 387 | * or an AP/GO interface use the broadcast station associated |
d0ab08d0 IP |
388 | * with it; otherwise if the interface is a managed interface |
389 | * use the AP station associated with it for multicast traffic | |
390 | * (this is not possible for unicast packets as a TLDS discovery | |
391 | * response are sent without a station entry); otherwise use the | |
392 | * AUX station. | |
8ca151b5 | 393 | */ |
d0ab08d0 IP |
394 | sta_id = mvm->aux_sta.sta_id; |
395 | if (info->control.vif) { | |
8ca151b5 JB |
396 | struct iwl_mvm_vif *mvmvif = |
397 | iwl_mvm_vif_from_mac80211(info->control.vif); | |
d0ab08d0 IP |
398 | |
399 | if (info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE || | |
400 | info->control.vif->type == NL80211_IFTYPE_AP) | |
401 | sta_id = mvmvif->bcast_sta.sta_id; | |
402 | else if (info->control.vif->type == NL80211_IFTYPE_STATION && | |
403 | is_multicast_ether_addr(hdr->addr1)) { | |
404 | u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id); | |
405 | ||
406 | if (ap_sta_id != IWL_MVM_STATION_COUNT) | |
407 | sta_id = ap_sta_id; | |
408 | } | |
8ca151b5 JB |
409 | } |
410 | ||
411 | IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, info->hw_queue); | |
412 | ||
ca8c0f4b | 413 | dev_cmd = iwl_mvm_set_tx_params(mvm, skb, hdrlen, NULL, sta_id); |
8ca151b5 JB |
414 | if (!dev_cmd) |
415 | return -1; | |
416 | ||
417 | /* From now on, we cannot access info->control */ | |
418 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; | |
419 | ||
420 | /* Copy MAC header from skb into command buffer */ | |
ca8c0f4b | 421 | memcpy(tx_cmd->hdr, hdr, hdrlen); |
8ca151b5 JB |
422 | |
423 | if (iwl_trans_tx(mvm->trans, skb, dev_cmd, info->hw_queue)) { | |
424 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); | |
425 | return -1; | |
426 | } | |
427 | ||
428 | return 0; | |
429 | } | |
430 | ||
a3713f8b EG |
431 | static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb_gso, |
432 | struct ieee80211_sta *sta, | |
433 | struct sk_buff_head *mpdus_skb) | |
434 | { | |
435 | struct sk_buff *tmp, *next; | |
436 | char cb[sizeof(skb_gso->cb)]; | |
437 | ||
438 | memcpy(cb, skb_gso->cb, sizeof(cb)); | |
439 | next = skb_gso_segment(skb_gso, 0); | |
440 | if (IS_ERR(next)) | |
441 | return -EINVAL; | |
442 | else if (next) | |
443 | consume_skb(skb_gso); | |
444 | ||
445 | while (next) { | |
446 | tmp = next; | |
447 | next = tmp->next; | |
448 | memcpy(tmp->cb, cb, sizeof(tmp->cb)); | |
449 | ||
450 | tmp->prev = NULL; | |
451 | tmp->next = NULL; | |
452 | ||
453 | __skb_queue_tail(mpdus_skb, tmp); | |
454 | } | |
455 | ||
456 | return 0; | |
457 | } | |
458 | ||
8ca151b5 JB |
459 | /* |
460 | * Sets the fields in the Tx cmd that are crypto related | |
461 | */ | |
a3713f8b EG |
462 | static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, |
463 | struct ieee80211_sta *sta) | |
8ca151b5 JB |
464 | { |
465 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
466 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
467 | struct iwl_mvm_sta *mvmsta; | |
468 | struct iwl_device_cmd *dev_cmd; | |
469 | struct iwl_tx_cmd *tx_cmd; | |
470 | __le16 fc; | |
471 | u16 seq_number = 0; | |
472 | u8 tid = IWL_MAX_TID_COUNT; | |
473 | u8 txq_id = info->hw_queue; | |
474 | bool is_data_qos = false, is_ampdu = false; | |
ca8c0f4b | 475 | int hdrlen; |
8ca151b5 | 476 | |
5b577a90 | 477 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 | 478 | fc = hdr->frame_control; |
ca8c0f4b | 479 | hdrlen = ieee80211_hdrlen(fc); |
8ca151b5 JB |
480 | |
481 | if (WARN_ON_ONCE(!mvmsta)) | |
482 | return -1; | |
483 | ||
881acd89 | 484 | if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) |
8ca151b5 JB |
485 | return -1; |
486 | ||
ca8c0f4b | 487 | dev_cmd = iwl_mvm_set_tx_params(mvm, skb, hdrlen, sta, mvmsta->sta_id); |
8ca151b5 JB |
488 | if (!dev_cmd) |
489 | goto drop; | |
490 | ||
491 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; | |
492 | /* From now on, we cannot access info->control */ | |
493 | ||
3e56eadf JB |
494 | /* |
495 | * we handle that entirely ourselves -- for uAPSD the firmware | |
496 | * will always send a notification, and for PS-Poll responses | |
497 | * we'll notify mac80211 when getting frame status | |
498 | */ | |
499 | info->flags &= ~IEEE80211_TX_STATUS_EOSP; | |
500 | ||
8ca151b5 JB |
501 | spin_lock(&mvmsta->lock); |
502 | ||
503 | if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { | |
504 | u8 *qc = NULL; | |
505 | qc = ieee80211_get_qos_ctl(hdr); | |
506 | tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; | |
507 | if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) | |
508 | goto drop_unlock_sta; | |
509 | ||
510 | seq_number = mvmsta->tid_data[tid].seq_number; | |
511 | seq_number &= IEEE80211_SCTL_SEQ; | |
512 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); | |
513 | hdr->seq_ctrl |= cpu_to_le16(seq_number); | |
8ca151b5 JB |
514 | is_data_qos = true; |
515 | is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; | |
516 | } | |
517 | ||
518 | /* Copy MAC header from skb into command buffer */ | |
ca8c0f4b | 519 | memcpy(tx_cmd->hdr, hdr, hdrlen); |
8ca151b5 JB |
520 | |
521 | WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); | |
522 | ||
a0f6bf2a AN |
523 | if (sta->tdls) { |
524 | /* default to TID 0 for non-QoS packets */ | |
525 | u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid; | |
526 | ||
527 | txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]]; | |
528 | } | |
529 | ||
8ca151b5 JB |
530 | if (is_ampdu) { |
531 | if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON)) | |
532 | goto drop_unlock_sta; | |
533 | txq_id = mvmsta->tid_data[tid].txq_id; | |
534 | } | |
535 | ||
536 | IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, | |
cf9d1188 | 537 | tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); |
8ca151b5 | 538 | |
8ca151b5 JB |
539 | if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) |
540 | goto drop_unlock_sta; | |
541 | ||
542 | if (is_data_qos && !ieee80211_has_morefrags(fc)) | |
cf9d1188 | 543 | mvmsta->tid_data[tid].seq_number = seq_number + 0x10; |
8ca151b5 JB |
544 | |
545 | spin_unlock(&mvmsta->lock); | |
546 | ||
19e737c9 | 547 | if (txq_id < mvm->first_agg_queue) |
e3d4bc8c | 548 | atomic_inc(&mvm->pending_frames[mvmsta->sta_id]); |
8ca151b5 JB |
549 | |
550 | return 0; | |
551 | ||
552 | drop_unlock_sta: | |
553 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); | |
554 | spin_unlock(&mvmsta->lock); | |
555 | drop: | |
556 | return -1; | |
557 | } | |
558 | ||
a3713f8b EG |
559 | int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, |
560 | struct ieee80211_sta *sta) | |
561 | { | |
562 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
563 | struct sk_buff_head mpdus_skbs; | |
564 | unsigned int payload_len; | |
565 | int ret; | |
566 | ||
567 | if (WARN_ON_ONCE(!mvmsta)) | |
568 | return -1; | |
569 | ||
570 | if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) | |
571 | return -1; | |
572 | ||
573 | if (!skb_is_gso(skb)) | |
574 | return iwl_mvm_tx_mpdu(mvm, skb, sta); | |
575 | ||
576 | payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - | |
577 | tcp_hdrlen(skb) + skb->data_len; | |
578 | ||
579 | if (payload_len <= skb_shinfo(skb)->gso_size) | |
580 | return iwl_mvm_tx_mpdu(mvm, skb, sta); | |
581 | ||
582 | __skb_queue_head_init(&mpdus_skbs); | |
583 | ||
584 | ret = iwl_mvm_tx_tso(mvm, skb, sta, &mpdus_skbs); | |
585 | if (ret) | |
586 | return ret; | |
587 | ||
588 | if (WARN_ON(skb_queue_empty(&mpdus_skbs))) | |
589 | return ret; | |
590 | ||
591 | while (!skb_queue_empty(&mpdus_skbs)) { | |
592 | struct sk_buff *skb = __skb_dequeue(&mpdus_skbs); | |
593 | ||
594 | ret = iwl_mvm_tx_mpdu(mvm, skb, sta); | |
595 | if (ret) { | |
596 | __skb_queue_purge(&mpdus_skbs); | |
597 | return ret; | |
598 | } | |
599 | } | |
600 | ||
601 | return 0; | |
602 | } | |
603 | ||
8ca151b5 JB |
604 | static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, |
605 | struct ieee80211_sta *sta, u8 tid) | |
606 | { | |
5b577a90 | 607 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
608 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; |
609 | struct ieee80211_vif *vif = mvmsta->vif; | |
610 | ||
611 | lockdep_assert_held(&mvmsta->lock); | |
612 | ||
3e56eadf JB |
613 | if ((tid_data->state == IWL_AGG_ON || |
614 | tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && | |
615 | iwl_mvm_tid_queued(tid_data) == 0) { | |
616 | /* | |
617 | * Now that this aggregation queue is empty tell mac80211 so it | |
618 | * knows we no longer have frames buffered for the station on | |
619 | * this TID (for the TIM bitmap calculation.) | |
620 | */ | |
621 | ieee80211_sta_set_buffered(sta, tid, false); | |
622 | } | |
623 | ||
8ca151b5 JB |
624 | if (tid_data->ssn != tid_data->next_reclaimed) |
625 | return; | |
626 | ||
627 | switch (tid_data->state) { | |
628 | case IWL_EMPTYING_HW_QUEUE_ADDBA: | |
629 | IWL_DEBUG_TX_QUEUES(mvm, | |
630 | "Can continue addBA flow ssn = next_recl = %d\n", | |
631 | tid_data->next_reclaimed); | |
632 | tid_data->state = IWL_AGG_STARTING; | |
633 | ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
634 | break; | |
635 | ||
636 | case IWL_EMPTYING_HW_QUEUE_DELBA: | |
637 | IWL_DEBUG_TX_QUEUES(mvm, | |
638 | "Can continue DELBA flow ssn = next_recl = %d\n", | |
639 | tid_data->next_reclaimed); | |
4ecafae9 LK |
640 | iwl_mvm_disable_txq(mvm, tid_data->txq_id, |
641 | vif->hw_queue[tid_to_mac80211_ac[tid]], tid, | |
642 | CMD_ASYNC); | |
8ca151b5 | 643 | tid_data->state = IWL_AGG_OFF; |
8ca151b5 JB |
644 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); |
645 | break; | |
646 | ||
647 | default: | |
648 | break; | |
649 | } | |
650 | } | |
651 | ||
652 | #ifdef CONFIG_IWLWIFI_DEBUG | |
653 | const char *iwl_mvm_get_tx_fail_reason(u32 status) | |
654 | { | |
655 | #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x | |
656 | #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x | |
657 | ||
658 | switch (status & TX_STATUS_MSK) { | |
659 | case TX_STATUS_SUCCESS: | |
660 | return "SUCCESS"; | |
661 | TX_STATUS_POSTPONE(DELAY); | |
662 | TX_STATUS_POSTPONE(FEW_BYTES); | |
663 | TX_STATUS_POSTPONE(BT_PRIO); | |
664 | TX_STATUS_POSTPONE(QUIET_PERIOD); | |
665 | TX_STATUS_POSTPONE(CALC_TTAK); | |
666 | TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); | |
667 | TX_STATUS_FAIL(SHORT_LIMIT); | |
668 | TX_STATUS_FAIL(LONG_LIMIT); | |
669 | TX_STATUS_FAIL(UNDERRUN); | |
670 | TX_STATUS_FAIL(DRAIN_FLOW); | |
671 | TX_STATUS_FAIL(RFKILL_FLUSH); | |
672 | TX_STATUS_FAIL(LIFE_EXPIRE); | |
673 | TX_STATUS_FAIL(DEST_PS); | |
674 | TX_STATUS_FAIL(HOST_ABORTED); | |
675 | TX_STATUS_FAIL(BT_RETRY); | |
676 | TX_STATUS_FAIL(STA_INVALID); | |
677 | TX_STATUS_FAIL(FRAG_DROPPED); | |
678 | TX_STATUS_FAIL(TID_DISABLE); | |
679 | TX_STATUS_FAIL(FIFO_FLUSHED); | |
680 | TX_STATUS_FAIL(SMALL_CF_POLL); | |
681 | TX_STATUS_FAIL(FW_DROP); | |
682 | TX_STATUS_FAIL(STA_COLOR_MISMATCH); | |
683 | } | |
684 | ||
685 | return "UNKNOWN"; | |
686 | ||
687 | #undef TX_STATUS_FAIL | |
688 | #undef TX_STATUS_POSTPONE | |
689 | } | |
690 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
691 | ||
d310e405 ES |
692 | void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, |
693 | enum ieee80211_band band, | |
694 | struct ieee80211_tx_rate *r) | |
8ca151b5 | 695 | { |
8ca151b5 JB |
696 | if (rate_n_flags & RATE_HT_MCS_GF_MSK) |
697 | r->flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
698 | switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { | |
699 | case RATE_MCS_CHAN_WIDTH_20: | |
700 | break; | |
701 | case RATE_MCS_CHAN_WIDTH_40: | |
702 | r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; | |
703 | break; | |
704 | case RATE_MCS_CHAN_WIDTH_80: | |
705 | r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; | |
706 | break; | |
707 | case RATE_MCS_CHAN_WIDTH_160: | |
708 | r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; | |
709 | break; | |
710 | } | |
711 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
712 | r->flags |= IEEE80211_TX_RC_SHORT_GI; | |
713 | if (rate_n_flags & RATE_MCS_HT_MSK) { | |
714 | r->flags |= IEEE80211_TX_RC_MCS; | |
715 | r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; | |
716 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { | |
717 | ieee80211_rate_set_vht( | |
718 | r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, | |
719 | ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> | |
720 | RATE_VHT_MCS_NSS_POS) + 1); | |
721 | r->flags |= IEEE80211_TX_RC_VHT_MCS; | |
722 | } else { | |
723 | r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, | |
d310e405 | 724 | band); |
8ca151b5 JB |
725 | } |
726 | } | |
727 | ||
d310e405 ES |
728 | /** |
729 | * translate ucode response to mac80211 tx status control values | |
730 | */ | |
731 | static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, | |
732 | struct ieee80211_tx_info *info) | |
733 | { | |
734 | struct ieee80211_tx_rate *r = &info->status.rates[0]; | |
735 | ||
736 | info->status.antenna = | |
737 | ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); | |
738 | iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); | |
739 | } | |
740 | ||
8ca151b5 JB |
741 | static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, |
742 | struct iwl_rx_packet *pkt) | |
743 | { | |
744 | struct ieee80211_sta *sta; | |
745 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
746 | int txq_id = SEQ_TO_QUEUE(sequence); | |
747 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
748 | int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); | |
749 | int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); | |
750 | u32 status = le16_to_cpu(tx_resp->status.status); | |
751 | u16 ssn = iwl_mvm_get_scd_ssn(tx_resp); | |
752 | struct iwl_mvm_sta *mvmsta; | |
753 | struct sk_buff_head skbs; | |
754 | u8 skb_freed = 0; | |
755 | u16 next_reclaimed, seq_ctl; | |
756 | ||
757 | __skb_queue_head_init(&skbs); | |
758 | ||
759 | seq_ctl = le16_to_cpu(tx_resp->seq_ctl); | |
760 | ||
761 | /* we can free until ssn % q.n_bd not inclusive */ | |
762 | iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); | |
763 | ||
764 | while (!skb_queue_empty(&skbs)) { | |
765 | struct sk_buff *skb = __skb_dequeue(&skbs); | |
766 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
767 | ||
768 | skb_freed++; | |
769 | ||
770 | iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); | |
771 | ||
772 | memset(&info->status, 0, sizeof(info->status)); | |
773 | ||
774 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; | |
775 | ||
776 | /* inform mac80211 about what happened with the frame */ | |
777 | switch (status & TX_STATUS_MSK) { | |
778 | case TX_STATUS_SUCCESS: | |
779 | case TX_STATUS_DIRECT_DONE: | |
780 | info->flags |= IEEE80211_TX_STAT_ACK; | |
781 | break; | |
782 | case TX_STATUS_FAIL_DEST_PS: | |
783 | info->flags |= IEEE80211_TX_STAT_TX_FILTERED; | |
784 | break; | |
785 | default: | |
786 | break; | |
787 | } | |
788 | ||
789 | info->status.rates[0].count = tx_resp->failure_frame + 1; | |
d310e405 ES |
790 | iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), |
791 | info); | |
929e6ede ES |
792 | info->status.status_driver_data[1] = |
793 | (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); | |
8ca151b5 JB |
794 | |
795 | /* Single frame failure in an AMPDU queue => send BAR */ | |
19e737c9 | 796 | if (txq_id >= mvm->first_agg_queue && |
9ce578a5 ES |
797 | !(info->flags & IEEE80211_TX_STAT_ACK) && |
798 | !(info->flags & IEEE80211_TX_STAT_TX_FILTERED)) | |
8ca151b5 | 799 | info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; |
8ca151b5 | 800 | |
ebea2f32 EG |
801 | /* W/A FW bug: seq_ctl is wrong when the status isn't success */ |
802 | if (status != TX_STATUS_SUCCESS) { | |
8ca151b5 JB |
803 | struct ieee80211_hdr *hdr = (void *)skb->data; |
804 | seq_ctl = le16_to_cpu(hdr->seq_ctrl); | |
805 | } | |
806 | ||
9b5452fd EG |
807 | /* |
808 | * TODO: this is not accurate if we are freeing more than one | |
809 | * packet. | |
810 | */ | |
811 | info->status.tx_time = | |
812 | le16_to_cpu(tx_resp->wireless_media_time); | |
3a84b69e EP |
813 | BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); |
814 | info->status.status_driver_data[0] = | |
815 | (void *)(uintptr_t)tx_resp->reduced_tpc; | |
816 | ||
f14d6b39 | 817 | ieee80211_tx_status(mvm->hw, skb); |
8ca151b5 JB |
818 | } |
819 | ||
19e737c9 | 820 | if (txq_id >= mvm->first_agg_queue) { |
8ca151b5 JB |
821 | /* If this is an aggregation queue, we use the ssn since: |
822 | * ssn = wifi seq_num % 256. | |
823 | * The seq_ctl is the sequence control of the packet to which | |
824 | * this Tx response relates. But if there is a hole in the | |
825 | * bitmap of the BA we received, this Tx response may allow to | |
826 | * reclaim the hole and all the subsequent packets that were | |
827 | * already acked. In that case, seq_ctl != ssn, and the next | |
828 | * packet to be reclaimed will be ssn and not seq_ctl. In that | |
829 | * case, several packets will be reclaimed even if | |
830 | * frame_count = 1. | |
831 | * | |
832 | * The ssn is the index (% 256) of the latest packet that has | |
833 | * treated (acked / dropped) + 1. | |
834 | */ | |
835 | next_reclaimed = ssn; | |
836 | } else { | |
837 | /* The next packet to be reclaimed is the one after this one */ | |
9a886586 | 838 | next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10); |
8ca151b5 JB |
839 | } |
840 | ||
841 | IWL_DEBUG_TX_REPLY(mvm, | |
8c6e83d6 EG |
842 | "TXQ %d status %s (0x%08x)\n", |
843 | txq_id, iwl_mvm_get_tx_fail_reason(status), status); | |
844 | ||
845 | IWL_DEBUG_TX_REPLY(mvm, | |
846 | "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", | |
847 | le32_to_cpu(tx_resp->initial_rate), | |
8ca151b5 JB |
848 | tx_resp->failure_frame, SEQ_TO_INDEX(sequence), |
849 | ssn, next_reclaimed, seq_ctl); | |
850 | ||
851 | rcu_read_lock(); | |
852 | ||
853 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
9bb0c1ad EG |
854 | /* |
855 | * sta can't be NULL otherwise it'd mean that the sta has been freed in | |
856 | * the firmware while we still have packets for it in the Tx queues. | |
857 | */ | |
858 | if (WARN_ON_ONCE(!sta)) | |
859 | goto out; | |
8ca151b5 | 860 | |
9bb0c1ad | 861 | if (!IS_ERR(sta)) { |
5b577a90 | 862 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
863 | |
864 | if (tid != IWL_TID_NON_QOS) { | |
865 | struct iwl_mvm_tid_data *tid_data = | |
866 | &mvmsta->tid_data[tid]; | |
36be0eb6 | 867 | bool send_eosp_ndp = false; |
8ca151b5 | 868 | |
2bfb5092 | 869 | spin_lock_bh(&mvmsta->lock); |
8ca151b5 JB |
870 | tid_data->next_reclaimed = next_reclaimed; |
871 | IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n", | |
872 | next_reclaimed); | |
873 | iwl_mvm_check_ratid_empty(mvm, sta, tid); | |
36be0eb6 EG |
874 | |
875 | if (mvmsta->sleep_tx_count) { | |
876 | mvmsta->sleep_tx_count--; | |
877 | if (mvmsta->sleep_tx_count && | |
878 | !iwl_mvm_tid_queued(tid_data)) { | |
879 | /* | |
880 | * The number of frames in the queue | |
881 | * dropped to 0 even if we sent less | |
882 | * frames than we thought we had on the | |
883 | * Tx queue. | |
884 | * This means we had holes in the BA | |
885 | * window that we just filled, ask | |
886 | * mac80211 to send EOSP since the | |
887 | * firmware won't know how to do that. | |
888 | * Send NDP and the firmware will send | |
889 | * EOSP notification that will trigger | |
890 | * a call to ieee80211_sta_eosp(). | |
891 | */ | |
892 | send_eosp_ndp = true; | |
893 | } | |
894 | } | |
895 | ||
2bfb5092 | 896 | spin_unlock_bh(&mvmsta->lock); |
36be0eb6 EG |
897 | if (send_eosp_ndp) { |
898 | iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, | |
899 | IEEE80211_FRAME_RELEASE_UAPSD, | |
900 | 1, tid, false, false); | |
901 | mvmsta->sleep_tx_count = 0; | |
902 | ieee80211_send_eosp_nullfunc(sta, tid); | |
903 | } | |
8ca151b5 | 904 | } |
3e56eadf JB |
905 | |
906 | if (mvmsta->next_status_eosp) { | |
907 | mvmsta->next_status_eosp = false; | |
908 | ieee80211_sta_eosp(sta); | |
909 | } | |
8ca151b5 | 910 | } else { |
8ca151b5 JB |
911 | mvmsta = NULL; |
912 | } | |
913 | ||
914 | /* | |
915 | * If the txq is not an AMPDU queue, there is no chance we freed | |
916 | * several skbs. Check that out... | |
8ca151b5 | 917 | */ |
9bb0c1ad EG |
918 | if (txq_id >= mvm->first_agg_queue) |
919 | goto out; | |
920 | ||
921 | /* We can't free more than one frame at once on a shared queue */ | |
922 | WARN_ON(skb_freed > 1); | |
923 | ||
589a6ba4 | 924 | /* If we have still frames for this STA nothing to do here */ |
9bb0c1ad EG |
925 | if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) |
926 | goto out; | |
927 | ||
928 | if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) { | |
003e5236 | 929 | |
9bb0c1ad | 930 | /* |
003e5236 AO |
931 | * If there are no pending frames for this STA and |
932 | * the tx to this station is not disabled, notify | |
933 | * mac80211 that this station can now wake up in its | |
9bb0c1ad EG |
934 | * STA table. |
935 | * If mvmsta is not NULL, sta is valid. | |
936 | */ | |
003e5236 AO |
937 | |
938 | spin_lock_bh(&mvmsta->lock); | |
939 | ||
940 | if (!mvmsta->disable_tx) | |
941 | ieee80211_sta_block_awake(mvm->hw, sta, false); | |
942 | ||
943 | spin_unlock_bh(&mvmsta->lock); | |
9bb0c1ad EG |
944 | } |
945 | ||
946 | if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) { | |
947 | /* | |
948 | * We are draining and this was the last packet - pre_rcu_remove | |
949 | * has been called already. We might be after the | |
950 | * synchronize_net already. | |
951 | * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues. | |
952 | */ | |
953 | set_bit(sta_id, mvm->sta_drained); | |
954 | schedule_work(&mvm->sta_drained_wk); | |
8ca151b5 JB |
955 | } |
956 | ||
9bb0c1ad | 957 | out: |
8ca151b5 JB |
958 | rcu_read_unlock(); |
959 | } | |
960 | ||
961 | #ifdef CONFIG_IWLWIFI_DEBUG | |
962 | #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x | |
963 | static const char *iwl_get_agg_tx_status(u16 status) | |
964 | { | |
965 | switch (status & AGG_TX_STATE_STATUS_MSK) { | |
966 | AGG_TX_STATE_(TRANSMITTED); | |
967 | AGG_TX_STATE_(UNDERRUN); | |
968 | AGG_TX_STATE_(BT_PRIO); | |
969 | AGG_TX_STATE_(FEW_BYTES); | |
970 | AGG_TX_STATE_(ABORT); | |
971 | AGG_TX_STATE_(LAST_SENT_TTL); | |
972 | AGG_TX_STATE_(LAST_SENT_TRY_CNT); | |
973 | AGG_TX_STATE_(LAST_SENT_BT_KILL); | |
974 | AGG_TX_STATE_(SCD_QUERY); | |
975 | AGG_TX_STATE_(TEST_BAD_CRC32); | |
976 | AGG_TX_STATE_(RESPONSE); | |
977 | AGG_TX_STATE_(DUMP_TX); | |
978 | AGG_TX_STATE_(DELAY_TX); | |
979 | } | |
980 | ||
981 | return "UNKNOWN"; | |
982 | } | |
983 | ||
984 | static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, | |
985 | struct iwl_rx_packet *pkt) | |
986 | { | |
987 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
988 | struct agg_tx_status *frame_status = &tx_resp->status; | |
989 | int i; | |
990 | ||
991 | for (i = 0; i < tx_resp->frame_count; i++) { | |
992 | u16 fstatus = le16_to_cpu(frame_status[i].status); | |
993 | ||
994 | IWL_DEBUG_TX_REPLY(mvm, | |
995 | "status %s (0x%04x), try-count (%d) seq (0x%x)\n", | |
996 | iwl_get_agg_tx_status(fstatus), | |
997 | fstatus & AGG_TX_STATE_STATUS_MSK, | |
998 | (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> | |
999 | AGG_TX_STATE_TRY_CNT_POS, | |
1000 | le16_to_cpu(frame_status[i].sequence)); | |
1001 | } | |
1002 | } | |
1003 | #else | |
1004 | static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, | |
1005 | struct iwl_rx_packet *pkt) | |
1006 | {} | |
1007 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
1008 | ||
1009 | static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, | |
1010 | struct iwl_rx_packet *pkt) | |
1011 | { | |
1012 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
1013 | int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); | |
1014 | int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); | |
1015 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
1016 | struct ieee80211_sta *sta; | |
1017 | ||
19e737c9 | 1018 | if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue)) |
8ca151b5 JB |
1019 | return; |
1020 | ||
1021 | if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) | |
1022 | return; | |
1023 | ||
1024 | iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); | |
1025 | ||
1026 | rcu_read_lock(); | |
1027 | ||
1028 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
1029 | ||
1030 | if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { | |
5b577a90 | 1031 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
1032 | mvmsta->tid_data[tid].rate_n_flags = |
1033 | le32_to_cpu(tx_resp->initial_rate); | |
3a84b69e | 1034 | mvmsta->tid_data[tid].reduced_tpc = tx_resp->reduced_tpc; |
9b5452fd EG |
1035 | mvmsta->tid_data[tid].tx_time = |
1036 | le16_to_cpu(tx_resp->wireless_media_time); | |
8ca151b5 JB |
1037 | } |
1038 | ||
1039 | rcu_read_unlock(); | |
1040 | } | |
1041 | ||
0416841d | 1042 | void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
8ca151b5 JB |
1043 | { |
1044 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
1045 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
1046 | ||
1047 | if (tx_resp->frame_count == 1) | |
1048 | iwl_mvm_rx_tx_cmd_single(mvm, pkt); | |
1049 | else | |
1050 | iwl_mvm_rx_tx_cmd_agg(mvm, pkt); | |
8ca151b5 JB |
1051 | } |
1052 | ||
a7130442 ES |
1053 | static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info, |
1054 | struct iwl_mvm_ba_notif *ba_notif, | |
1055 | struct iwl_mvm_tid_data *tid_data) | |
1056 | { | |
1057 | info->flags |= IEEE80211_TX_STAT_AMPDU; | |
1058 | info->status.ampdu_ack_len = ba_notif->txed_2_done; | |
1059 | info->status.ampdu_len = ba_notif->txed; | |
1060 | iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags, | |
1061 | info); | |
9b5452fd EG |
1062 | /* TODO: not accounted if the whole A-MPDU failed */ |
1063 | info->status.tx_time = tid_data->tx_time; | |
a7130442 ES |
1064 | info->status.status_driver_data[0] = |
1065 | (void *)(uintptr_t)tid_data->reduced_tpc; | |
929e6ede ES |
1066 | info->status.status_driver_data[1] = |
1067 | (void *)(uintptr_t)tid_data->rate_n_flags; | |
a7130442 ES |
1068 | } |
1069 | ||
0416841d | 1070 | void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
8ca151b5 JB |
1071 | { |
1072 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
1073 | struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data; | |
1074 | struct sk_buff_head reclaimed_skbs; | |
1075 | struct iwl_mvm_tid_data *tid_data; | |
8ca151b5 JB |
1076 | struct ieee80211_sta *sta; |
1077 | struct iwl_mvm_sta *mvmsta; | |
8ca151b5 JB |
1078 | struct sk_buff *skb; |
1079 | int sta_id, tid, freed; | |
8ca151b5 JB |
1080 | /* "flow" corresponds to Tx queue */ |
1081 | u16 scd_flow = le16_to_cpu(ba_notif->scd_flow); | |
8ca151b5 JB |
1082 | /* "ssn" is start of block-ack Tx window, corresponds to index |
1083 | * (in Tx queue's circular buffer) of first TFD/frame in window */ | |
1084 | u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn); | |
1085 | ||
1086 | sta_id = ba_notif->sta_id; | |
1087 | tid = ba_notif->tid; | |
1088 | ||
2cee4762 ES |
1089 | if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || |
1090 | tid >= IWL_MAX_TID_COUNT, | |
1091 | "sta_id %d tid %d", sta_id, tid)) | |
0416841d | 1092 | return; |
2cee4762 | 1093 | |
8ca151b5 JB |
1094 | rcu_read_lock(); |
1095 | ||
1096 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
1097 | ||
1098 | /* Reclaiming frames for a station that has been deleted ? */ | |
1099 | if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { | |
1100 | rcu_read_unlock(); | |
0416841d | 1101 | return; |
8ca151b5 JB |
1102 | } |
1103 | ||
5b577a90 | 1104 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
1105 | tid_data = &mvmsta->tid_data[tid]; |
1106 | ||
1f16ea29 JB |
1107 | if (tid_data->txq_id != scd_flow) { |
1108 | IWL_ERR(mvm, | |
1109 | "invalid BA notification: Q %d, tid %d, flow %d\n", | |
1110 | tid_data->txq_id, tid, scd_flow); | |
8ca151b5 | 1111 | rcu_read_unlock(); |
0416841d | 1112 | return; |
8ca151b5 JB |
1113 | } |
1114 | ||
2bfb5092 | 1115 | spin_lock_bh(&mvmsta->lock); |
8ca151b5 JB |
1116 | |
1117 | __skb_queue_head_init(&reclaimed_skbs); | |
1118 | ||
1119 | /* | |
1120 | * Release all TFDs before the SSN, i.e. all TFDs in front of | |
1121 | * block-ack window (we assume that they've been successfully | |
1122 | * transmitted ... if not, it's too late anyway). | |
1123 | */ | |
1124 | iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn, | |
1125 | &reclaimed_skbs); | |
1126 | ||
1127 | IWL_DEBUG_TX_REPLY(mvm, | |
1128 | "BA_NOTIFICATION Received from %pM, sta_id = %d\n", | |
1129 | (u8 *)&ba_notif->sta_addr_lo32, | |
1130 | ba_notif->sta_id); | |
1131 | IWL_DEBUG_TX_REPLY(mvm, | |
1132 | "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", | |
1133 | ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), | |
1134 | (unsigned long long)le64_to_cpu(ba_notif->bitmap), | |
1135 | scd_flow, ba_resp_scd_ssn, ba_notif->txed, | |
1136 | ba_notif->txed_2_done); | |
1137 | ||
1138 | tid_data->next_reclaimed = ba_resp_scd_ssn; | |
1139 | ||
1140 | iwl_mvm_check_ratid_empty(mvm, sta, tid); | |
1141 | ||
1142 | freed = 0; | |
1143 | ||
1144 | skb_queue_walk(&reclaimed_skbs, skb) { | |
143582c6 JB |
1145 | struct ieee80211_hdr *hdr = (void *)skb->data; |
1146 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
8ca151b5 JB |
1147 | |
1148 | if (ieee80211_is_data_qos(hdr->frame_control)) | |
1149 | freed++; | |
1150 | else | |
1151 | WARN_ON_ONCE(1); | |
1152 | ||
8ca151b5 JB |
1153 | iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); |
1154 | ||
143582c6 JB |
1155 | memset(&info->status, 0, sizeof(info->status)); |
1156 | /* Packet was transmitted successfully, failures come as single | |
1157 | * frames because before failing a frame the firmware transmits | |
1158 | * it without aggregation at least once. | |
1159 | */ | |
1160 | info->flags |= IEEE80211_TX_STAT_ACK; | |
1161 | ||
a7130442 ES |
1162 | /* this is the first skb we deliver in this batch */ |
1163 | /* put the rate scaling data there */ | |
1164 | if (freed == 1) | |
1165 | iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data); | |
8ca151b5 JB |
1166 | } |
1167 | ||
2bfb5092 | 1168 | spin_unlock_bh(&mvmsta->lock); |
8ca151b5 | 1169 | |
a7130442 ES |
1170 | /* We got a BA notif with 0 acked or scd_ssn didn't progress which is |
1171 | * possible (i.e. first MPDU in the aggregation wasn't acked) | |
1172 | * Still it's important to update RS about sent vs. acked. | |
1173 | */ | |
1174 | if (skb_queue_empty(&reclaimed_skbs)) { | |
1175 | struct ieee80211_tx_info ba_info = {}; | |
1176 | struct ieee80211_chanctx_conf *chanctx_conf = NULL; | |
1177 | ||
1178 | if (mvmsta->vif) | |
1179 | chanctx_conf = | |
1180 | rcu_dereference(mvmsta->vif->chanctx_conf); | |
1181 | ||
1182 | if (WARN_ON_ONCE(!chanctx_conf)) | |
1183 | goto out; | |
1184 | ||
1185 | ba_info.band = chanctx_conf->def.chan->band; | |
1186 | iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data); | |
1187 | ||
1188 | IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); | |
1189 | iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info); | |
1190 | } | |
1191 | ||
1192 | out: | |
8ca151b5 JB |
1193 | rcu_read_unlock(); |
1194 | ||
1195 | while (!skb_queue_empty(&reclaimed_skbs)) { | |
1196 | skb = __skb_dequeue(&reclaimed_skbs); | |
f14d6b39 | 1197 | ieee80211_tx_status(mvm->hw, skb); |
8ca151b5 | 1198 | } |
8ca151b5 JB |
1199 | } |
1200 | ||
fe92e32a EG |
1201 | /* |
1202 | * Note that there are transports that buffer frames before they reach | |
1203 | * the firmware. This means that after flush_tx_path is called, the | |
1204 | * queue might not be empty. The race-free way to handle this is to: | |
1205 | * 1) set the station as draining | |
1206 | * 2) flush the Tx path | |
1207 | * 3) wait for the transport queues to be empty | |
1208 | */ | |
5888a40c | 1209 | int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) |
8ca151b5 JB |
1210 | { |
1211 | int ret; | |
1212 | struct iwl_tx_path_flush_cmd flush_cmd = { | |
1213 | .queues_ctl = cpu_to_le32(tfd_msk), | |
1214 | .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), | |
1215 | }; | |
1216 | ||
8ca151b5 JB |
1217 | ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, |
1218 | sizeof(flush_cmd), &flush_cmd); | |
1219 | if (ret) | |
1220 | IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); | |
1221 | return ret; | |
1222 | } |