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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / wireless / intel / iwlwifi / mvm / rs-fw.c
blobe2cf9e015ef8c8f310583ed334d161bbdf7f3845
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 *
8 * Copyright(c) 2017 Intel Deutschland GmbH
9 * Copyright(c) 2018 - 2019 Intel Corporation
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 * The full GNU General Public License is included in this distribution
21 * in the file called COPYING.
22 *
23 * Contact Information:
24 * Intel Linux Wireless <linuxwifi@intel.com>
25 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26 *
27 * BSD LICENSE
28 *
29 * Copyright(c) 2017 Intel Deutschland GmbH
30 * Copyright(c) 2018 - 2019 Intel Corporation
31 * All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 *
37 * * Redistributions of source code must retain the above copyright
38 * notice, this list of conditions and the following disclaimer.
39 * * Redistributions in binary form must reproduce the above copyright
40 * notice, this list of conditions and the following disclaimer in
41 * the documentation and/or other materials provided with the
42 * distribution.
43 * * Neither the name Intel Corporation nor the names of its
44 * contributors may be used to endorse or promote products derived
45 * from this software without specific prior written permission.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
48 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
49 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
50 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
51 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
52 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
53 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
54 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
55 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
56 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
57 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
58 *
59 *****************************************************************************/
60 #include "rs.h"
61 #include "fw-api.h"
62 #include "sta.h"
63 #include "iwl-op-mode.h"
64 #include "mvm.h"
65
66 static u8 rs_fw_bw_from_sta_bw(struct ieee80211_sta *sta)
67 {
68 switch (sta->bandwidth) {
69 case IEEE80211_STA_RX_BW_160:
70 return IWL_TLC_MNG_CH_WIDTH_160MHZ;
71 case IEEE80211_STA_RX_BW_80:
72 return IWL_TLC_MNG_CH_WIDTH_80MHZ;
73 case IEEE80211_STA_RX_BW_40:
74 return IWL_TLC_MNG_CH_WIDTH_40MHZ;
75 case IEEE80211_STA_RX_BW_20:
76 default:
77 return IWL_TLC_MNG_CH_WIDTH_20MHZ;
78 }
79 }
80
81 static u8 rs_fw_set_active_chains(u8 chains)
82 {
83 u8 fw_chains = 0;
84
85 if (chains & ANT_A)
86 fw_chains |= IWL_TLC_MNG_CHAIN_A_MSK;
87 if (chains & ANT_B)
88 fw_chains |= IWL_TLC_MNG_CHAIN_B_MSK;
89 if (chains & ANT_C)
90 WARN(false,
91 "tlc offload doesn't support antenna C. chains: 0x%x\n",
92 chains);
93
94 return fw_chains;
95 }
96
97 static u8 rs_fw_sgi_cw_support(struct ieee80211_sta *sta)
98 {
99 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
100 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
101 struct ieee80211_sta_he_cap *he_cap = &sta->he_cap;
102 u8 supp = 0;
103
104 if (he_cap->has_he)
105 return 0;
106
107 if (ht_cap->cap & IEEE80211_HT_CAP_SGI_20)
108 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_20MHZ);
109 if (ht_cap->cap & IEEE80211_HT_CAP_SGI_40)
110 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_40MHZ);
111 if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_80)
112 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_80MHZ);
113 if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_160)
114 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_160MHZ);
115
116 return supp;
117 }
118
119 static u16 rs_fw_get_config_flags(struct iwl_mvm *mvm,
120 struct ieee80211_sta *sta,
121 struct ieee80211_supported_band *sband)
122 {
123 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
124 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
125 struct ieee80211_sta_he_cap *he_cap = &sta->he_cap;
126 bool vht_ena = vht_cap->vht_supported;
127 u16 flags = 0;
128
129 if (mvm->cfg->ht_params->stbc &&
130 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1)) {
131 if (he_cap->has_he) {
132 if (he_cap->he_cap_elem.phy_cap_info[2] &
133 IEEE80211_HE_PHY_CAP2_STBC_RX_UNDER_80MHZ)
134 flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK;
135
136 if (he_cap->he_cap_elem.phy_cap_info[7] &
137 IEEE80211_HE_PHY_CAP7_STBC_RX_ABOVE_80MHZ)
138 flags |= IWL_TLC_MNG_CFG_FLAGS_HE_STBC_160MHZ_MSK;
139 } else if ((ht_cap->cap & IEEE80211_HT_CAP_RX_STBC) ||
140 (vht_ena &&
141 (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK)))
142 flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK;
143 }
144
145 if (mvm->cfg->ht_params->ldpc &&
146 ((ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING) ||
147 (vht_ena && (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC))))
148 flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK;
149
150 /* consider our LDPC support in case of HE */
151 if (sband->iftype_data && sband->iftype_data->he_cap.has_he &&
152 !(sband->iftype_data->he_cap.he_cap_elem.phy_cap_info[1] &
153 IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD))
154 flags &= ~IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK;
155
156 if (he_cap->has_he &&
157 (he_cap->he_cap_elem.phy_cap_info[3] &
158 IEEE80211_HE_PHY_CAP3_DCM_MAX_CONST_RX_MASK))
159 flags |= IWL_TLC_MNG_CFG_FLAGS_HE_DCM_NSS_1_MSK;
160
161 return flags;
162 }
163
164 static
165 int rs_fw_vht_highest_rx_mcs_index(const struct ieee80211_sta_vht_cap *vht_cap,
166 int nss)
167 {
168 u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) &
169 (0x3 << (2 * (nss - 1)));
170 rx_mcs >>= (2 * (nss - 1));
171
172 switch (rx_mcs) {
173 case IEEE80211_VHT_MCS_SUPPORT_0_7:
174 return IWL_TLC_MNG_HT_RATE_MCS7;
175 case IEEE80211_VHT_MCS_SUPPORT_0_8:
176 return IWL_TLC_MNG_HT_RATE_MCS8;
177 case IEEE80211_VHT_MCS_SUPPORT_0_9:
178 return IWL_TLC_MNG_HT_RATE_MCS9;
179 default:
180 WARN_ON_ONCE(1);
181 break;
182 }
183
184 return 0;
185 }
186
187 static void
188 rs_fw_vht_set_enabled_rates(const struct ieee80211_sta *sta,
189 const struct ieee80211_sta_vht_cap *vht_cap,
190 struct iwl_tlc_config_cmd *cmd)
191 {
192 u16 supp;
193 int i, highest_mcs;
194
195 for (i = 0; i < sta->rx_nss; i++) {
196 if (i == IWL_TLC_NSS_MAX)
197 break;
198
199 highest_mcs = rs_fw_vht_highest_rx_mcs_index(vht_cap, i + 1);
200 if (!highest_mcs)
201 continue;
202
203 supp = BIT(highest_mcs + 1) - 1;
204 if (sta->bandwidth == IEEE80211_STA_RX_BW_20)
205 supp &= ~BIT(IWL_TLC_MNG_HT_RATE_MCS9);
206
207 cmd->ht_rates[i][IWL_TLC_HT_BW_NONE_160] = cpu_to_le16(supp);
208 if (sta->bandwidth == IEEE80211_STA_RX_BW_160)
209 cmd->ht_rates[i][IWL_TLC_HT_BW_160] =
210 cmd->ht_rates[i][IWL_TLC_HT_BW_NONE_160];
211 }
212 }
213
214 static u16 rs_fw_he_ieee80211_mcs_to_rs_mcs(u16 mcs)
215 {
216 switch (mcs) {
217 case IEEE80211_HE_MCS_SUPPORT_0_7:
218 return BIT(IWL_TLC_MNG_HT_RATE_MCS7 + 1) - 1;
219 case IEEE80211_HE_MCS_SUPPORT_0_9:
220 return BIT(IWL_TLC_MNG_HT_RATE_MCS9 + 1) - 1;
221 case IEEE80211_HE_MCS_SUPPORT_0_11:
222 return BIT(IWL_TLC_MNG_HT_RATE_MCS11 + 1) - 1;
223 case IEEE80211_HE_MCS_NOT_SUPPORTED:
224 return 0;
225 }
226
227 WARN(1, "invalid HE MCS %d\n", mcs);
228 return 0;
229 }
230
231 static void
232 rs_fw_he_set_enabled_rates(const struct ieee80211_sta *sta,
233 struct ieee80211_supported_band *sband,
234 struct iwl_tlc_config_cmd *cmd)
235 {
236 const struct ieee80211_sta_he_cap *he_cap = &sta->he_cap;
237 u16 mcs_160 = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160);
238 u16 mcs_80 = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80);
239 u16 tx_mcs_80 =
240 le16_to_cpu(sband->iftype_data->he_cap.he_mcs_nss_supp.tx_mcs_80);
241 u16 tx_mcs_160 =
242 le16_to_cpu(sband->iftype_data->he_cap.he_mcs_nss_supp.tx_mcs_160);
243 int i;
244
245 for (i = 0; i < sta->rx_nss && i < IWL_TLC_NSS_MAX; i++) {
246 u16 _mcs_160 = (mcs_160 >> (2 * i)) & 0x3;
247 u16 _mcs_80 = (mcs_80 >> (2 * i)) & 0x3;
248 u16 _tx_mcs_160 = (tx_mcs_160 >> (2 * i)) & 0x3;
249 u16 _tx_mcs_80 = (tx_mcs_80 >> (2 * i)) & 0x3;
250
251 /* If one side doesn't support - mark both as not supporting */
252 if (_mcs_80 == IEEE80211_HE_MCS_NOT_SUPPORTED ||
253 _tx_mcs_80 == IEEE80211_HE_MCS_NOT_SUPPORTED) {
254 _mcs_80 = IEEE80211_HE_MCS_NOT_SUPPORTED;
255 _tx_mcs_80 = IEEE80211_HE_MCS_NOT_SUPPORTED;
256 }
257 if (_mcs_80 > _tx_mcs_80)
258 _mcs_80 = _tx_mcs_80;
259 cmd->ht_rates[i][IWL_TLC_HT_BW_NONE_160] =
260 cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_80));
261
262 /* If one side doesn't support - mark both as not supporting */
263 if (_mcs_160 == IEEE80211_HE_MCS_NOT_SUPPORTED ||
264 _tx_mcs_160 == IEEE80211_HE_MCS_NOT_SUPPORTED) {
265 _mcs_160 = IEEE80211_HE_MCS_NOT_SUPPORTED;
266 _tx_mcs_160 = IEEE80211_HE_MCS_NOT_SUPPORTED;
267 }
268 if (_mcs_160 > _tx_mcs_160)
269 _mcs_160 = _tx_mcs_160;
270 cmd->ht_rates[i][IWL_TLC_HT_BW_160] =
271 cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_160));
272 }
273 }
274
275 static void rs_fw_set_supp_rates(struct ieee80211_sta *sta,
276 struct ieee80211_supported_band *sband,
277 struct iwl_tlc_config_cmd *cmd)
278 {
279 int i;
280 unsigned long tmp;
281 unsigned long supp; /* must be unsigned long for for_each_set_bit */
282 const struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
283 const struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
284 const struct ieee80211_sta_he_cap *he_cap = &sta->he_cap;
285
286 /* non HT rates */
287 supp = 0;
288 tmp = sta->supp_rates[sband->band];
289 for_each_set_bit(i, &tmp, BITS_PER_LONG)
290 supp |= BIT(sband->bitrates[i].hw_value);
291
292 cmd->non_ht_rates = cpu_to_le16(supp);
293 cmd->mode = IWL_TLC_MNG_MODE_NON_HT;
294
295 /* HT/VHT rates */
296 if (he_cap->has_he) {
297 cmd->mode = IWL_TLC_MNG_MODE_HE;
298 rs_fw_he_set_enabled_rates(sta, sband, cmd);
299 } else if (vht_cap->vht_supported) {
300 cmd->mode = IWL_TLC_MNG_MODE_VHT;
301 rs_fw_vht_set_enabled_rates(sta, vht_cap, cmd);
302 } else if (ht_cap->ht_supported) {
303 cmd->mode = IWL_TLC_MNG_MODE_HT;
304 cmd->ht_rates[IWL_TLC_NSS_1][IWL_TLC_HT_BW_NONE_160] =
305 cpu_to_le16(ht_cap->mcs.rx_mask[0]);
306 cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_HT_BW_NONE_160] =
307 cpu_to_le16(ht_cap->mcs.rx_mask[1]);
308 }
309 }
310
311 void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm,
312 struct iwl_rx_cmd_buffer *rxb)
313 {
314 struct iwl_rx_packet *pkt = rxb_addr(rxb);
315 struct iwl_tlc_update_notif *notif;
316 struct ieee80211_sta *sta;
317 struct iwl_mvm_sta *mvmsta;
318 struct iwl_lq_sta_rs_fw *lq_sta;
319 u32 flags;
320
321 rcu_read_lock();
322
323 notif = (void *)pkt->data;
324 sta = rcu_dereference(mvm->fw_id_to_mac_id[notif->sta_id]);
325 if (IS_ERR_OR_NULL(sta)) {
326 IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n",
327 notif->sta_id);
328 goto out;
329 }
330
331 mvmsta = iwl_mvm_sta_from_mac80211(sta);
332
333 if (!mvmsta) {
334 IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n",
335 notif->sta_id);
336 goto out;
337 }
338
339 flags = le32_to_cpu(notif->flags);
340
341 lq_sta = &mvmsta->lq_sta.rs_fw;
342
343 if (flags & IWL_TLC_NOTIF_FLAG_RATE) {
344 char pretty_rate[100];
345 lq_sta->last_rate_n_flags = le32_to_cpu(notif->rate);
346 rs_pretty_print_rate(pretty_rate, sizeof(pretty_rate),
347 lq_sta->last_rate_n_flags);
348 IWL_DEBUG_RATE(mvm, "new rate: %s\n", pretty_rate);
349 }
350
351 if (flags & IWL_TLC_NOTIF_FLAG_AMSDU && !mvmsta->orig_amsdu_len) {
352 u16 size = le32_to_cpu(notif->amsdu_size);
353 int i;
354
355 /*
356 * In debug sta->max_amsdu_len < size
357 * so also check with orig_amsdu_len which holds the original
358 * data before debugfs changed the value
359 */
360 if (WARN_ON(sta->max_amsdu_len < size &&
361 mvmsta->orig_amsdu_len < size))
362 goto out;
363
364 mvmsta->amsdu_enabled = le32_to_cpu(notif->amsdu_enabled);
365 mvmsta->max_amsdu_len = size;
366 sta->max_rc_amsdu_len = mvmsta->max_amsdu_len;
367
368 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
369 if (mvmsta->amsdu_enabled & BIT(i))
370 sta->max_tid_amsdu_len[i] =
371 iwl_mvm_max_amsdu_size(mvm, sta, i);
372 else
373 /*
374 * Not so elegant, but this will effectively
375 * prevent AMSDU on this TID
376 */
377 sta->max_tid_amsdu_len[i] = 1;
378 }
379
380 IWL_DEBUG_RATE(mvm,
381 "AMSDU update. AMSDU size: %d, AMSDU selected size: %d, AMSDU TID bitmap 0x%X\n",
382 le32_to_cpu(notif->amsdu_size), size,
383 mvmsta->amsdu_enabled);
384 }
385 out:
386 rcu_read_unlock();
387 }
388
389 u16 rs_fw_get_max_amsdu_len(struct ieee80211_sta *sta)
390 {
391 const struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
392 const struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
393
394 if (vht_cap->vht_supported) {
395 switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) {
396 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
397 return IEEE80211_MAX_MPDU_LEN_VHT_11454;
398 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
399 return IEEE80211_MAX_MPDU_LEN_VHT_7991;
400 default:
401 return IEEE80211_MAX_MPDU_LEN_VHT_3895;
402 }
403
404 } else if (ht_cap->ht_supported) {
405 if (ht_cap->cap & IEEE80211_HT_CAP_MAX_AMSDU)
406 /*
407 * agg is offloaded so we need to assume that agg
408 * are enabled and max mpdu in ampdu is 4095
409 * (spec 802.11-2016 9.3.2.1)
410 */
411 return IEEE80211_MAX_MPDU_LEN_HT_BA;
412 else
413 return IEEE80211_MAX_MPDU_LEN_HT_3839;
414 }
415
416 /* in legacy mode no amsdu is enabled so return zero */
417 return 0;
418 }
419
420 void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
421 enum nl80211_band band, bool update)
422 {
423 struct ieee80211_hw *hw = mvm->hw;
424 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
425 struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw;
426 u32 cmd_id = iwl_cmd_id(TLC_MNG_CONFIG_CMD, DATA_PATH_GROUP, 0);
427 struct ieee80211_supported_band *sband = hw->wiphy->bands[band];
428 u16 max_amsdu_len = rs_fw_get_max_amsdu_len(sta);
429 struct iwl_tlc_config_cmd cfg_cmd = {
430 .sta_id = mvmsta->sta_id,
431 .max_ch_width = update ?
432 rs_fw_bw_from_sta_bw(sta) : RATE_MCS_CHAN_WIDTH_20,
433 .flags = cpu_to_le16(rs_fw_get_config_flags(mvm, sta, sband)),
434 .chains = rs_fw_set_active_chains(iwl_mvm_get_valid_tx_ant(mvm)),
435 .sgi_ch_width_supp = rs_fw_sgi_cw_support(sta),
436 .max_mpdu_len = cpu_to_le16(max_amsdu_len),
437 .amsdu = iwl_mvm_is_csum_supported(mvm),
438 };
439 int ret;
440
441 memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers));
442
443 #ifdef CONFIG_IWLWIFI_DEBUGFS
444 iwl_mvm_reset_frame_stats(mvm);
445 #endif
446 rs_fw_set_supp_rates(sta, sband, &cfg_cmd);
447
448 /*
449 * since TLC offload works with one mode we can assume
450 * that only vht/ht is used and also set it as station max amsdu
451 */
452 sta->max_amsdu_len = max_amsdu_len;
453
454 ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, CMD_ASYNC, sizeof(cfg_cmd),
455 &cfg_cmd);
456 if (ret)
457 IWL_ERR(mvm, "Failed to send rate scale config (%d)\n", ret);
458 }
459
460 int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
461 bool enable)
462 {
463 /* TODO: need to introduce a new FW cmd since LQ cmd is not relevant */
464 IWL_DEBUG_RATE(mvm, "tx protection - not implemented yet.\n");
465 return 0;
466 }
467
468 void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta)
469 {
470 struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw;
471
472 IWL_DEBUG_RATE(mvm, "create station rate scale window\n");
473
474 lq_sta->pers.drv = mvm;
475 lq_sta->pers.sta_id = mvmsta->sta_id;
476 lq_sta->pers.chains = 0;
477 memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal));
478 lq_sta->pers.last_rssi = S8_MIN;
479 lq_sta->last_rate_n_flags = 0;
480
481 #ifdef CONFIG_MAC80211_DEBUGFS
482 lq_sta->pers.dbg_fixed_rate = 0;
483 #endif
484 }
Linux with added FPC-III support