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iwlwifi: mvm: fix possible out-of-bounds read when accessing lq_info
[linux-block.git] / drivers / net / wireless / intel / iwlwifi / mvm / rs.c
CommitLineData
4273a380 1// SPDX-License-Identifier: GPL-2.0-only
8ca151b5
JB		 2/******************************************************************************
3 *
51368bf7 4 * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
fcc5e851 5 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
ea42d1cb 6 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
a53b2a0b 7 * Copyright(c) 2018 - 2019 Intel Corporation
8ca151b5 8 *
8ca151b5 9 * Contact Information:
cb2f8277 10 * Intel Linux Wireless <linuxwifi@intel.com>
8ca151b5
JB		 11 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
12 *
13 *****************************************************************************/
14#include <linux/kernel.h>
8ca151b5
JB		 15#include <linux/skbuff.h>
16#include <linux/slab.h>
17#include <net/mac80211.h>
18
19#include <linux/netdevice.h>
20#include <linux/etherdevice.h>
21#include <linux/delay.h>
22
23#include <linux/workqueue.h>
24#include "rs.h"
25#include "fw-api.h"
26#include "sta.h"
27#include "iwl-op-mode.h"
28#include "mvm.h"
1e9c62fa 29#include "debugfs.h"
8ca151b5 30
8ca151b5 31#define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */
8ca151b5 32
834437da
ES		 33/* Calculations of success ratio are done in fixed point where 12800 is 100%.
34 * Use this macro when dealing with thresholds consts set as a percentage
35 */
36#define RS_PERCENT(x) (128 * x)
8ca151b5
JB		 37
38static u8 rs_ht_to_legacy[] = {
da87d7d5
ES		 39 [IWL_RATE_MCS_0_INDEX] = IWL_RATE_6M_INDEX,
40 [IWL_RATE_MCS_1_INDEX] = IWL_RATE_9M_INDEX,
41 [IWL_RATE_MCS_2_INDEX] = IWL_RATE_12M_INDEX,
42 [IWL_RATE_MCS_3_INDEX] = IWL_RATE_18M_INDEX,
43 [IWL_RATE_MCS_4_INDEX] = IWL_RATE_24M_INDEX,
44 [IWL_RATE_MCS_5_INDEX] = IWL_RATE_36M_INDEX,
45 [IWL_RATE_MCS_6_INDEX] = IWL_RATE_48M_INDEX,
46 [IWL_RATE_MCS_7_INDEX] = IWL_RATE_54M_INDEX,
47 [IWL_RATE_MCS_8_INDEX] = IWL_RATE_54M_INDEX,
48 [IWL_RATE_MCS_9_INDEX] = IWL_RATE_54M_INDEX,
8ca151b5
JB		 49};
50
51static const u8 ant_toggle_lookup[] = {
ef4394b9
EP		 52 [ANT_NONE] = ANT_NONE,
53 [ANT_A] = ANT_B,
82d2b9a6
EG		 54 [ANT_B] = ANT_A,
55 [ANT_AB] = ANT_AB,
8ca151b5
JB		 56};
57
d310e405
ES		 58#define IWL_DECLARE_RATE_INFO(r, s, rp, rn) \
59 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
60 IWL_RATE_HT_SISO_MCS_##s##_PLCP, \
61 IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \
62 IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \
63 IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP,\
64 IWL_RATE_##rp##M_INDEX, \
ab055ce9 65 IWL_RATE_##rn##M_INDEX }
8ca151b5 66
d310e405
ES		 67#define IWL_DECLARE_MCS_RATE(s) \
68 [IWL_RATE_MCS_##s##_INDEX] = { IWL_RATE_INVM_PLCP, \
69 IWL_RATE_HT_SISO_MCS_##s##_PLCP, \
70 IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \
71 IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \
72 IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP, \
73 IWL_RATE_INVM_INDEX, \
74 IWL_RATE_INVM_INDEX }
75
8ca151b5
JB		 76/*
77 * Parameter order:
ab055ce9 78 * rate, ht rate, prev rate, next rate
8ca151b5
JB		 79 *
80 * If there isn't a valid next or previous rate then INV is used which
81 * maps to IWL_RATE_INVALID
82 *
83 */
84static const struct iwl_rs_rate_info iwl_rates[IWL_RATE_COUNT] = {
ab055ce9
ES		 85 IWL_DECLARE_RATE_INFO(1, INV, INV, 2), /* 1mbps */
86 IWL_DECLARE_RATE_INFO(2, INV, 1, 5), /* 2mbps */
87 IWL_DECLARE_RATE_INFO(5, INV, 2, 11), /*5.5mbps */
88 IWL_DECLARE_RATE_INFO(11, INV, 9, 12), /* 11mbps */
d310e405
ES		 89 IWL_DECLARE_RATE_INFO(6, 0, 5, 11), /* 6mbps ; MCS 0 */
90 IWL_DECLARE_RATE_INFO(9, INV, 6, 11), /* 9mbps */
91 IWL_DECLARE_RATE_INFO(12, 1, 11, 18), /* 12mbps ; MCS 1 */
92 IWL_DECLARE_RATE_INFO(18, 2, 12, 24), /* 18mbps ; MCS 2 */
93 IWL_DECLARE_RATE_INFO(24, 3, 18, 36), /* 24mbps ; MCS 3 */
94 IWL_DECLARE_RATE_INFO(36, 4, 24, 48), /* 36mbps ; MCS 4 */
95 IWL_DECLARE_RATE_INFO(48, 5, 36, 54), /* 48mbps ; MCS 5 */
96 IWL_DECLARE_RATE_INFO(54, 6, 48, INV), /* 54mbps ; MCS 6 */
97 IWL_DECLARE_MCS_RATE(7), /* MCS 7 */
98 IWL_DECLARE_MCS_RATE(8), /* MCS 8 */
99 IWL_DECLARE_MCS_RATE(9), /* MCS 9 */
8ca151b5
JB		 100};
101
4e4b815c
ES		 102enum rs_action {
103 RS_ACTION_STAY = 0,
104 RS_ACTION_DOWNSCALE = -1,
105 RS_ACTION_UPSCALE = 1,
106};
107
b3b06a32
ES		 108enum rs_column_mode {
109 RS_INVALID = 0,
110 RS_LEGACY,
111 RS_SISO,
112 RS_MIMO2,
113};
114
fd7dbee5 115#define MAX_NEXT_COLUMNS 7
b3b06a32
ES		 116#define MAX_COLUMN_CHECKS 3
117
0b8d17f3
ES		 118struct rs_tx_column;
119
b3b06a32
ES		 120typedef bool (*allow_column_func_t) (struct iwl_mvm *mvm,
121 struct ieee80211_sta *sta,
bb8f44c9 122 struct rs_rate *rate,
0b8d17f3 123 const struct rs_tx_column *next_col);
b3b06a32
ES		 124
125struct rs_tx_column {
126 enum rs_column_mode mode;
127 u8 ant;
128 bool sgi;
129 enum rs_column next_columns[MAX_NEXT_COLUMNS];
130 allow_column_func_t checks[MAX_COLUMN_CHECKS];
131};
132
219fb66b 133static bool rs_ant_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
bb8f44c9 134 struct rs_rate *rate,
0b8d17f3 135 const struct rs_tx_column *next_col)
219fb66b 136{
0b8d17f3 137 return iwl_mvm_bt_coex_is_ant_avail(mvm, next_col->ant);
219fb66b
EG		 138}
139
b3b06a32 140static bool rs_mimo_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
bb8f44c9 141 struct rs_rate *rate,
0b8d17f3 142 const struct rs_tx_column *next_col)
b3b06a32
ES		 143{
144 if (!sta->ht_cap.ht_supported)
145 return false;
146
147 if (sta->smps_mode == IEEE80211_SMPS_STATIC)
148 return false;
149
a0544272 150 if (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) < 2)
b3b06a32
ES		 151 return false;
152
153 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))
154 return false;
155
5f0d98f2
EG		 156 if (mvm->nvm_data->sku_cap_mimo_disabled)
157 return false;
158
b3b06a32
ES		 159 return true;
160}
161
162static bool rs_siso_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
bb8f44c9 163 struct rs_rate *rate,
0b8d17f3 164 const struct rs_tx_column *next_col)
b3b06a32
ES		 165{
166 if (!sta->ht_cap.ht_supported)
167 return false;
168
169 return true;
170}
171
172static bool rs_sgi_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
bb8f44c9 173 struct rs_rate *rate,
0b8d17f3 174 const struct rs_tx_column *next_col)
b3b06a32 175{
b3b06a32
ES		 176 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
177 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
178
179 if (is_ht20(rate) && (ht_cap->cap &
180 IEEE80211_HT_CAP_SGI_20))
181 return true;
182 if (is_ht40(rate) && (ht_cap->cap &
183 IEEE80211_HT_CAP_SGI_40))
184 return true;
185 if (is_ht80(rate) && (vht_cap->cap &
186 IEEE80211_VHT_CAP_SHORT_GI_80))
187 return true;
855f492f
GG		 188 if (is_ht160(rate) && (vht_cap->cap &
189 IEEE80211_VHT_CAP_SHORT_GI_160))
190 return true;
b3b06a32
ES		 191
192 return false;
193}
194
195static const struct rs_tx_column rs_tx_columns[] = {
196 [RS_COLUMN_LEGACY_ANT_A] = {
197 .mode = RS_LEGACY,
198 .ant = ANT_A,
199 .next_columns = {
200 RS_COLUMN_LEGACY_ANT_B,
201 RS_COLUMN_SISO_ANT_A,
31b20452 202 RS_COLUMN_MIMO2,
d8fff919
ES		 203 RS_COLUMN_INVALID,
204 RS_COLUMN_INVALID,
fd7dbee5
ES		 205 RS_COLUMN_INVALID,
206 RS_COLUMN_INVALID,
b3b06a32 207 },
219fb66b
EG		 208 .checks = {
209 rs_ant_allow,
210 },
b3b06a32
ES		 211 },
212 [RS_COLUMN_LEGACY_ANT_B] = {
213 .mode = RS_LEGACY,
214 .ant = ANT_B,
215 .next_columns = {
216 RS_COLUMN_LEGACY_ANT_A,
217 RS_COLUMN_SISO_ANT_B,
31b20452 218 RS_COLUMN_MIMO2,
d8fff919
ES		 219 RS_COLUMN_INVALID,
220 RS_COLUMN_INVALID,
fd7dbee5
ES		 221 RS_COLUMN_INVALID,
222 RS_COLUMN_INVALID,
b3b06a32 223 },
219fb66b
EG		 224 .checks = {
225 rs_ant_allow,
226 },
b3b06a32
ES		 227 },
228 [RS_COLUMN_SISO_ANT_A] = {
229 .mode = RS_SISO,
230 .ant = ANT_A,
231 .next_columns = {
232 RS_COLUMN_SISO_ANT_B,
233 RS_COLUMN_MIMO2,
234 RS_COLUMN_SISO_ANT_A_SGI,
fd7dbee5
ES		 235 RS_COLUMN_LEGACY_ANT_A,
236 RS_COLUMN_LEGACY_ANT_B,
d8fff919 237 RS_COLUMN_INVALID,
31b20452 238 RS_COLUMN_INVALID,
b3b06a32
ES		 239 },
240 .checks = {
241 rs_siso_allow,
219fb66b 242 rs_ant_allow,
b3b06a32
ES		 243 },
244 },
245 [RS_COLUMN_SISO_ANT_B] = {
246 .mode = RS_SISO,
247 .ant = ANT_B,
248 .next_columns = {
249 RS_COLUMN_SISO_ANT_A,
250 RS_COLUMN_MIMO2,
251 RS_COLUMN_SISO_ANT_B_SGI,
fd7dbee5
ES		 252 RS_COLUMN_LEGACY_ANT_A,
253 RS_COLUMN_LEGACY_ANT_B,
d8fff919 254 RS_COLUMN_INVALID,
31b20452 255 RS_COLUMN_INVALID,
b3b06a32
ES		 256 },
257 .checks = {
258 rs_siso_allow,
219fb66b 259 rs_ant_allow,
b3b06a32
ES		 260 },
261 },
262 [RS_COLUMN_SISO_ANT_A_SGI] = {
263 .mode = RS_SISO,
264 .ant = ANT_A,
265 .sgi = true,
266 .next_columns = {
267 RS_COLUMN_SISO_ANT_B_SGI,
268 RS_COLUMN_MIMO2_SGI,
269 RS_COLUMN_SISO_ANT_A,
fd7dbee5
ES		 270 RS_COLUMN_LEGACY_ANT_A,
271 RS_COLUMN_LEGACY_ANT_B,
31b20452
ES		 272 RS_COLUMN_INVALID,
273 RS_COLUMN_INVALID,
b3b06a32
ES		 274 },
275 .checks = {
276 rs_siso_allow,
219fb66b 277 rs_ant_allow,
b3b06a32
ES		 278 rs_sgi_allow,
279 },
280 },
281 [RS_COLUMN_SISO_ANT_B_SGI] = {
282 .mode = RS_SISO,
283 .ant = ANT_B,
284 .sgi = true,
285 .next_columns = {
286 RS_COLUMN_SISO_ANT_A_SGI,
287 RS_COLUMN_MIMO2_SGI,
288 RS_COLUMN_SISO_ANT_B,
fd7dbee5
ES		 289 RS_COLUMN_LEGACY_ANT_A,
290 RS_COLUMN_LEGACY_ANT_B,
31b20452
ES		 291 RS_COLUMN_INVALID,
292 RS_COLUMN_INVALID,
b3b06a32
ES		 293 },
294 .checks = {
295 rs_siso_allow,
219fb66b 296 rs_ant_allow,
b3b06a32
ES		 297 rs_sgi_allow,
298 },
299 },
300 [RS_COLUMN_MIMO2] = {
301 .mode = RS_MIMO2,
302 .ant = ANT_AB,
303 .next_columns = {
304 RS_COLUMN_SISO_ANT_A,
305 RS_COLUMN_MIMO2_SGI,
fd7dbee5
ES		 306 RS_COLUMN_LEGACY_ANT_A,
307 RS_COLUMN_LEGACY_ANT_B,
31b20452
ES		 308 RS_COLUMN_INVALID,
309 RS_COLUMN_INVALID,
310 RS_COLUMN_INVALID,
b3b06a32
ES		 311 },
312 .checks = {
313 rs_mimo_allow,
314 },
315 },
316 [RS_COLUMN_MIMO2_SGI] = {
317 .mode = RS_MIMO2,
318 .ant = ANT_AB,
319 .sgi = true,
320 .next_columns = {
321 RS_COLUMN_SISO_ANT_A_SGI,
322 RS_COLUMN_MIMO2,
fd7dbee5
ES		 323 RS_COLUMN_LEGACY_ANT_A,
324 RS_COLUMN_LEGACY_ANT_B,
31b20452
ES		 325 RS_COLUMN_INVALID,
326 RS_COLUMN_INVALID,
327 RS_COLUMN_INVALID,
b3b06a32
ES		 328 },
329 .checks = {
330 rs_mimo_allow,
331 rs_sgi_allow,
332 },
333 },
334};
335
8ca151b5
JB		 336static inline u8 rs_extract_rate(u32 rate_n_flags)
337{
338 /* also works for HT because bits 7:6 are zero there */
339 return (u8)(rate_n_flags & RATE_LEGACY_RATE_MSK);
340}
341
342static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
343{
344 int idx = 0;
345
8ca151b5 346 if (rate_n_flags & RATE_MCS_HT_MSK) {
d310e405
ES		 347 idx = rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK;
348 idx += IWL_RATE_MCS_0_INDEX;
8ca151b5 349
d310e405 350 /* skip 9M not supported in HT*/
8ca151b5
JB		 351 if (idx >= IWL_RATE_9M_INDEX)
352 idx += 1;
4e82dd3a 353 if ((idx >= IWL_FIRST_HT_RATE) && (idx <= IWL_LAST_HT_RATE))
8ca151b5 354 return idx;
514c3069
LC		 355 } else if (rate_n_flags & RATE_MCS_VHT_MSK ||
356 rate_n_flags & RATE_MCS_HE_MSK) {
d310e405
ES		 357 idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
358 idx += IWL_RATE_MCS_0_INDEX;
8ca151b5 359
d310e405
ES		 360 /* skip 9M not supported in VHT*/
361 if (idx >= IWL_RATE_9M_INDEX)
362 idx++;
363 if ((idx >= IWL_FIRST_VHT_RATE) && (idx <= IWL_LAST_VHT_RATE))
364 return idx;
514c3069
LC		 365 if ((rate_n_flags & RATE_MCS_HE_MSK) &&
366 (idx <= IWL_LAST_HE_RATE))
367 return idx;
8ca151b5 368 } else {
d310e405
ES		 369 /* legacy rate format, search for match in table */
370
371 u8 legacy_rate = rs_extract_rate(rate_n_flags);
8ca151b5 372 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
d310e405 373 if (iwl_rates[idx].plcp == legacy_rate)
8ca151b5
JB		 374 return idx;
375 }
376
560843f4 377 return IWL_RATE_INVALID;
8ca151b5
JB		 378}
379
380static void rs_rate_scale_perform(struct iwl_mvm *mvm,
1ebc8f2e
ES		 381 struct ieee80211_sta *sta,
382 struct iwl_lq_sta *lq_sta,
ff7a68d0 383 int tid, bool ndp);
8fc7c58c
ES		 384static void rs_fill_lq_cmd(struct iwl_mvm *mvm,
385 struct ieee80211_sta *sta,
386 struct iwl_lq_sta *lq_sta,
387 const struct rs_rate *initial_rate);
8ca151b5 388static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search);
8ca151b5 389
8ca151b5
JB		 390/**
391 * The following tables contain the expected throughput metrics for all rates
392 *
393 * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits
394 *
395 * where invalid entries are zeros.
396 *
397 * CCK rates are only valid in legacy table and will only be used in G
398 * (2.4 GHz) band.
399 */
400
a34529e8 401static const u16 expected_tpt_legacy[IWL_RATE_COUNT] = {
4e82dd3a 402 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0, 0, 0
8ca151b5
JB		 403};
404
4e82dd3a
ES		 405/* Expected TpT tables. 4 indexes:
406 * 0 - NGI, 1 - SGI, 2 - AGG+NGI, 3 - AGG+SGI
407 */
a34529e8 408static const u16 expected_tpt_siso_20MHz[4][IWL_RATE_COUNT] = {
4e82dd3a
ES		 409 {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202, 216, 0},
410 {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210, 225, 0},
411 {0, 0, 0, 0, 49, 0, 97, 145, 192, 285, 375, 420, 464, 551, 0},
412 {0, 0, 0, 0, 54, 0, 108, 160, 213, 315, 415, 465, 513, 608, 0},
8ca151b5
JB		 413};
414
a34529e8 415static const u16 expected_tpt_siso_40MHz[4][IWL_RATE_COUNT] = {
4e82dd3a
ES		 416 {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257, 269, 275},
417 {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264, 275, 280},
418 {0, 0, 0, 0, 101, 0, 199, 295, 389, 570, 744, 828, 911, 1070, 1173},
419 {0, 0, 0, 0, 112, 0, 220, 326, 429, 629, 819, 912, 1000, 1173, 1284},
8ca151b5
JB		 420};
421
a34529e8 422static const u16 expected_tpt_siso_80MHz[4][IWL_RATE_COUNT] = {
d310e405
ES		 423 {0, 0, 0, 0, 130, 0, 191, 223, 244, 273, 288, 294, 298, 305, 308},
424 {0, 0, 0, 0, 138, 0, 200, 231, 251, 279, 293, 298, 302, 308, 312},
425 {0, 0, 0, 0, 217, 0, 429, 634, 834, 1220, 1585, 1760, 1931, 2258, 2466},
426 {0, 0, 0, 0, 241, 0, 475, 701, 921, 1343, 1741, 1931, 2117, 2468, 2691},
427};
428
855f492f
GG		 429static const u16 expected_tpt_siso_160MHz[4][IWL_RATE_COUNT] = {
430 {0, 0, 0, 0, 191, 0, 244, 288, 298, 308, 313, 318, 323, 328, 330},
431 {0, 0, 0, 0, 200, 0, 251, 293, 302, 312, 317, 322, 327, 332, 334},
432 {0, 0, 0, 0, 439, 0, 875, 1307, 1736, 2584, 3419, 3831, 4240, 5049, 5581},
433 {0, 0, 0, 0, 488, 0, 972, 1451, 1925, 2864, 3785, 4240, 4691, 5581, 6165},
434};
435
a34529e8 436static const u16 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = {
4e82dd3a
ES		 437 {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250, 261, 0},
438 {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256, 267, 0},
439 {0, 0, 0, 0, 98, 0, 193, 286, 375, 550, 718, 799, 878, 1032, 0},
440 {0, 0, 0, 0, 109, 0, 214, 316, 414, 607, 790, 879, 965, 1132, 0},
8ca151b5
JB		 441};
442
a34529e8 443static const u16 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = {
4e82dd3a
ES		 444 {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289, 296, 300},
445 {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293, 300, 303},
446 {0, 0, 0, 0, 200, 0, 390, 571, 741, 1067, 1365, 1505, 1640, 1894, 2053},
447 {0, 0, 0, 0, 221, 0, 430, 630, 816, 1169, 1490, 1641, 1784, 2053, 2221},
8ca151b5
JB		 448};
449
a34529e8 450static const u16 expected_tpt_mimo2_80MHz[4][IWL_RATE_COUNT] = {
d310e405
ES		 451 {0, 0, 0, 0, 182, 0, 240, 264, 278, 299, 308, 311, 313, 317, 319},
452 {0, 0, 0, 0, 190, 0, 247, 269, 282, 302, 310, 313, 315, 319, 320},
453 {0, 0, 0, 0, 428, 0, 833, 1215, 1577, 2254, 2863, 3147, 3418, 3913, 4219},
454 {0, 0, 0, 0, 474, 0, 920, 1338, 1732, 2464, 3116, 3418, 3705, 4225, 4545},
455};
456
855f492f
GG		 457static const u16 expected_tpt_mimo2_160MHz[4][IWL_RATE_COUNT] = {
458 {0, 0, 0, 0, 240, 0, 278, 308, 313, 319, 322, 324, 328, 330, 334},
459 {0, 0, 0, 0, 247, 0, 282, 310, 315, 320, 323, 325, 329, 332, 338},
460 {0, 0, 0, 0, 875, 0, 1735, 2582, 3414, 5043, 6619, 7389, 8147, 9629, 10592},
461 {0, 0, 0, 0, 971, 0, 1925, 2861, 3779, 5574, 7304, 8147, 8976, 10592, 11640},
462};
463
8ca151b5
JB		 464/* mbps, mcs */
465static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = {
466 { "1", "BPSK DSSS"},
467 { "2", "QPSK DSSS"},
468 {"5.5", "BPSK CCK"},
469 { "11", "QPSK CCK"},
470 { "6", "BPSK 1/2"},
471 { "9", "BPSK 1/2"},
472 { "12", "QPSK 1/2"},
473 { "18", "QPSK 3/4"},
474 { "24", "16QAM 1/2"},
475 { "36", "16QAM 3/4"},
476 { "48", "64QAM 2/3"},
477 { "54", "64QAM 3/4"},
478 { "60", "64QAM 5/6"},
479};
480
481#define MCS_INDEX_PER_STREAM (8)
482
9d10849e
EG		 483static const char *rs_pretty_ant(u8 ant)
484{
485 static const char * const ant_name[] = {
486 [ANT_NONE] = "None",
487 [ANT_A] = "A",
488 [ANT_B] = "B",
489 [ANT_AB] = "AB",
490 [ANT_C] = "C",
491 [ANT_AC] = "AC",
492 [ANT_BC] = "BC",
493 [ANT_ABC] = "ABC",
494 };
495
496 if (ant > ANT_ABC)
497 return "UNKNOWN";
498
499 return ant_name[ant];
500}
501
502static const char *rs_pretty_lq_type(enum iwl_table_type type)
503{
504 static const char * const lq_types[] = {
505 [LQ_NONE] = "NONE",
506 [LQ_LEGACY_A] = "LEGACY_A",
507 [LQ_LEGACY_G] = "LEGACY_G",
508 [LQ_HT_SISO] = "HT SISO",
509 [LQ_HT_MIMO2] = "HT MIMO",
510 [LQ_VHT_SISO] = "VHT SISO",
511 [LQ_VHT_MIMO2] = "VHT MIMO",
514c3069
LC		 512 [LQ_HE_SISO] = "HE SISO",
513 [LQ_HE_MIMO2] = "HE MIMO",
9d10849e
EG		 514 };
515
516 if (type < LQ_NONE || type >= LQ_MAX)
517 return "UNKNOWN";
518
519 return lq_types[type];
520}
521
cc60c6e9
ES		 522static char *rs_pretty_rate(const struct rs_rate *rate)
523{
524 static char buf[40];
525 static const char * const legacy_rates[] = {
526 [IWL_RATE_1M_INDEX] = "1M",
527 [IWL_RATE_2M_INDEX] = "2M",
528 [IWL_RATE_5M_INDEX] = "5.5M",
529 [IWL_RATE_11M_INDEX] = "11M",
530 [IWL_RATE_6M_INDEX] = "6M",
531 [IWL_RATE_9M_INDEX] = "9M",
532 [IWL_RATE_12M_INDEX] = "12M",
533 [IWL_RATE_18M_INDEX] = "18M",
534 [IWL_RATE_24M_INDEX] = "24M",
535 [IWL_RATE_36M_INDEX] = "36M",
536 [IWL_RATE_48M_INDEX] = "48M",
537 [IWL_RATE_54M_INDEX] = "54M",
538 };
539 static const char *const ht_vht_rates[] = {
540 [IWL_RATE_MCS_0_INDEX] = "MCS0",
541 [IWL_RATE_MCS_1_INDEX] = "MCS1",
542 [IWL_RATE_MCS_2_INDEX] = "MCS2",
543 [IWL_RATE_MCS_3_INDEX] = "MCS3",
544 [IWL_RATE_MCS_4_INDEX] = "MCS4",
545 [IWL_RATE_MCS_5_INDEX] = "MCS5",
546 [IWL_RATE_MCS_6_INDEX] = "MCS6",
547 [IWL_RATE_MCS_7_INDEX] = "MCS7",
548 [IWL_RATE_MCS_8_INDEX] = "MCS8",
549 [IWL_RATE_MCS_9_INDEX] = "MCS9",
550 };
551 const char *rate_str;
552
e8b3f7b6 553 if (is_type_legacy(rate->type) && (rate->index <= IWL_RATE_54M_INDEX))
cc60c6e9 554 rate_str = legacy_rates[rate->index];
e8b3f7b6 555 else if ((is_type_ht(rate->type) || is_type_vht(rate->type)) &&
4494541c 556 (rate->index >= IWL_RATE_MCS_0_INDEX) &&
e8b3f7b6 557 (rate->index <= IWL_RATE_MCS_9_INDEX))
cc60c6e9
ES		 558 rate_str = ht_vht_rates[rate->index];
559 else
560 rate_str = "BAD_RATE";
561
562 sprintf(buf, "(%s|%s|%s)", rs_pretty_lq_type(rate->type),
563 rs_pretty_ant(rate->ant), rate_str);
564 return buf;
565}
566
5aa33553
ES		 567static inline void rs_dump_rate(struct iwl_mvm *mvm, const struct rs_rate *rate,
568 const char *prefix)
569{
d8bafeaf 570 IWL_DEBUG_RATE(mvm,
cc60c6e9
ES		 571 "%s: %s BW: %d SGI: %d LDPC: %d STBC: %d\n",
572 prefix, rs_pretty_rate(rate), rate->bw,
573 rate->sgi, rate->ldpc, rate->stbc);
5aa33553
ES		 574}
575
8ca151b5
JB		 576static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window)
577{
578 window->data = 0;
579 window->success_counter = 0;
580 window->success_ratio = IWL_INVALID_VALUE;
581 window->counter = 0;
582 window->average_tpt = IWL_INVALID_VALUE;
8ca151b5
JB		 583}
584
b804eeb6
ES		 585static void rs_rate_scale_clear_tbl_windows(struct iwl_mvm *mvm,
586 struct iwl_scale_tbl_info *tbl)
3ca71f60
EP		 587{
588 int i;
589
b804eeb6 590 IWL_DEBUG_RATE(mvm, "Clearing up window stats\n");
3ca71f60
EP		 591 for (i = 0; i < IWL_RATE_COUNT; i++)
592 rs_rate_scale_clear_window(&tbl->win[i]);
2fd647f8
EP		 593
594 for (i = 0; i < ARRAY_SIZE(tbl->tpc_win); i++)
595 rs_rate_scale_clear_window(&tbl->tpc_win[i]);
3ca71f60
EP		 596}
597
8ca151b5
JB		 598static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type)
599{
600 return (ant_type & valid_antenna) == ant_type;
601}
602
8ca151b5 603static int rs_tl_turn_on_agg_for_tid(struct iwl_mvm *mvm,
40ce5ed1
ES		 604 struct iwl_lq_sta *lq_data, u8 tid,
605 struct ieee80211_sta *sta)
8ca151b5
JB		 606{
607 int ret = -EAGAIN;
8ca151b5 608
44cc429c
EG		 609 IWL_DEBUG_HT(mvm, "Starting Tx agg: STA: %pM tid: %d\n",
610 sta->addr, tid);
482e4844
GG		 611
612 /* start BA session until the peer sends del BA */
613 ret = ieee80211_start_tx_ba_session(sta, tid, 0);
44cc429c
EG		 614 if (ret == -EAGAIN) {
615 /*
616 * driver and mac80211 is out of sync
617 * this might be cause by reloading firmware
618 * stop the tx ba session here
619 */
620 IWL_ERR(mvm, "Fail start Tx agg on tid: %d\n",
621 tid);
622 ieee80211_stop_tx_ba_session(sta, tid);
8ca151b5
JB		 623 }
624 return ret;
625}
626
482e4844
GG		 627static void rs_tl_turn_on_agg(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
628 u8 tid, struct iwl_lq_sta *lq_sta,
8ca151b5
JB		 629 struct ieee80211_sta *sta)
630{
482e4844
GG		 631 struct iwl_mvm_tid_data *tid_data;
632
633 /*
634 * In AP mode, tid can be equal to IWL_MAX_TID_COUNT
635 * when the frame is not QoS
636 */
637 if (WARN_ON_ONCE(tid > IWL_MAX_TID_COUNT)) {
8ca151b5
JB		 638 IWL_ERR(mvm, "tid exceeds max TID count: %d/%d\n",
639 tid, IWL_MAX_TID_COUNT);
482e4844
GG		 640 return;
641 } else if (tid == IWL_MAX_TID_COUNT) {
642 return;
643 }
644
645 tid_data = &mvmsta->tid_data[tid];
d94c5a82
GG		 646 if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED &&
647 tid_data->state == IWL_AGG_OFF &&
482e4844 648 (lq_sta->tx_agg_tid_en & BIT(tid)) &&
d94c5a82 649 tid_data->tx_count_last >= IWL_MVM_RS_AGG_START_THRESHOLD) {
482e4844 650 IWL_DEBUG_RATE(mvm, "try to aggregate tid %d\n", tid);
bd800e41
NG		 651 if (rs_tl_turn_on_agg_for_tid(mvm, lq_sta, tid, sta) == 0)
652 tid_data->state = IWL_AGG_QUEUED;
482e4844 653 }
8ca151b5
JB		 654}
655
656static inline int get_num_of_ant_from_rate(u32 rate_n_flags)
657{
658 return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) +
659 !!(rate_n_flags & RATE_MCS_ANT_B_MSK) +
660 !!(rate_n_flags & RATE_MCS_ANT_C_MSK);
661}
662
663/*
664 * Static function to get the expected throughput from an iwl_scale_tbl_info
665 * that wraps a NULL pointer check
666 */
667static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index)
668{
669 if (tbl->expected_tpt)
670 return tbl->expected_tpt[rs_index];
671 return 0;
672}
673
674/**
675 * rs_collect_tx_data - Update the success/failure sliding window
676 *
677 * We keep a sliding window of the last 62 packets transmitted
678 * at this rate. window->data contains the bitmask of successful
679 * packets.
680 */
834437da
ES		 681static int _rs_collect_tx_data(struct iwl_mvm *mvm,
682 struct iwl_scale_tbl_info *tbl,
0bd3c5a7
EP		 683 int scale_index, int attempts, int successes,
684 struct iwl_rate_scale_data *window)
8ca151b5 685{
8ca151b5
JB		 686 static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1));
687 s32 fail_count, tpt;
688
8ca151b5
JB		 689 /* Get expected throughput */
690 tpt = get_expected_tpt(tbl, scale_index);
691
692 /*
693 * Keep track of only the latest 62 tx frame attempts in this rate's
694 * history window; anything older isn't really relevant any more.
695 * If we have filled up the sliding window, drop the oldest attempt;
696 * if the oldest attempt (highest bit in bitmap) shows "success",
697 * subtract "1" from the success counter (this is the main reason
698 * we keep these bitmaps!).
699 */
700 while (attempts > 0) {
701 if (window->counter >= IWL_RATE_MAX_WINDOW) {
702 /* remove earliest */
703 window->counter = IWL_RATE_MAX_WINDOW - 1;
704
705 if (window->data & mask) {
706 window->data &= ~mask;
707 window->success_counter--;
708 }
709 }
710
711 /* Increment frames-attempted counter */
712 window->counter++;
713
714 /* Shift bitmap by one frame to throw away oldest history */
715 window->data <<= 1;
716
717 /* Mark the most recent #successes attempts as successful */
718 if (successes > 0) {
719 window->success_counter++;
720 window->data |= 0x1;
721 successes--;
722 }
723
724 attempts--;
725 }
726
727 /* Calculate current success ratio, avoid divide-by-0! */
728 if (window->counter > 0)
729 window->success_ratio = 128 * (100 * window->success_counter)
730 / window->counter;
731 else
732 window->success_ratio = IWL_INVALID_VALUE;
733
734 fail_count = window->counter - window->success_counter;
735
736 /* Calculate average throughput, if we have enough history. */
834437da
ES		 737 if ((fail_count >= IWL_MVM_RS_RATE_MIN_FAILURE_TH) ||
738 (window->success_counter >= IWL_MVM_RS_RATE_MIN_SUCCESS_TH))
8ca151b5
JB		 739 window->average_tpt = (window->success_ratio * tpt + 64) / 128;
740 else
741 window->average_tpt = IWL_INVALID_VALUE;
742
8ca151b5
JB		 743 return 0;
744}
745
69c7fda4
GG		 746static int rs_collect_tpc_data(struct iwl_mvm *mvm,
747 struct iwl_lq_sta *lq_sta,
748 struct iwl_scale_tbl_info *tbl,
749 int scale_index, int attempts, int successes,
750 u8 reduced_txp)
751{
752 struct iwl_rate_scale_data *window = NULL;
753
754 if (WARN_ON_ONCE(reduced_txp > TPC_MAX_REDUCTION))
755 return -EINVAL;
756
757 window = &tbl->tpc_win[reduced_txp];
758 return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes,
759 window);
760}
761
482e4844
GG		 762static void rs_update_tid_tpt_stats(struct iwl_mvm *mvm,
763 struct iwl_mvm_sta *mvmsta,
764 u8 tid, int successes)
765{
766 struct iwl_mvm_tid_data *tid_data;
767
768 if (tid >= IWL_MAX_TID_COUNT)
769 return;
770
771 tid_data = &mvmsta->tid_data[tid];
772
773 /*
774 * Measure if there're enough successful transmits per second.
775 * These statistics are used only to decide if we can start a
776 * BA session, so it should be updated only when A-MPDU is
777 * off.
778 */
779 if (tid_data->state != IWL_AGG_OFF)
780 return;
781
782 if (time_is_before_jiffies(tid_data->tpt_meas_start + HZ) ||
783 (tid_data->tx_count >= IWL_MVM_RS_AGG_START_THRESHOLD)) {
784 tid_data->tx_count_last = tid_data->tx_count;
785 tid_data->tx_count = 0;
786 tid_data->tpt_meas_start = jiffies;
787 } else {
788 tid_data->tx_count += successes;
789 }
790}
791
69c7fda4 792static int rs_collect_tlc_data(struct iwl_mvm *mvm,
482e4844 793 struct iwl_mvm_sta *mvmsta, u8 tid,
69c7fda4
GG		 794 struct iwl_scale_tbl_info *tbl,
795 int scale_index, int attempts, int successes)
0bd3c5a7
EP		 796{
797 struct iwl_rate_scale_data *window = NULL;
798
799 if (scale_index < 0 || scale_index >= IWL_RATE_COUNT)
800 return -EINVAL;
801
757cf23b 802 if (tbl->column != RS_COLUMN_INVALID) {
ecaf71de 803 struct lq_sta_pers *pers = &mvmsta->lq_sta.rs_drv.pers;
f58220f6
ES		 804
805 pers->tx_stats[tbl->column][scale_index].total += attempts;
806 pers->tx_stats[tbl->column][scale_index].success += successes;
757cf23b
ES		 807 }
808
482e4844
GG		 809 rs_update_tid_tpt_stats(mvm, mvmsta, tid, successes);
810
0bd3c5a7
EP		 811 /* Select window for current tx bit rate */
812 window = &(tbl->win[scale_index]);
834437da 813 return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes,
0bd3c5a7
EP		 814 window);
815}
816
5aa33553
ES		 817/* Convert rs_rate object into ucode rate bitmask */
818static u32 ucode_rate_from_rs_rate(struct iwl_mvm *mvm,
8fc7c58c 819 struct rs_rate *rate)
8ca151b5 820{
5aa33553
ES		 821 u32 ucode_rate = 0;
822 int index = rate->index;
8ca151b5 823
5aa33553 824 ucode_rate |= ((rate->ant << RATE_MCS_ANT_POS) &
d310e405
ES		 825 RATE_MCS_ANT_ABC_MSK);
826
5aa33553
ES		 827 if (is_legacy(rate)) {
828 ucode_rate |= iwl_rates[index].plcp;
8ca151b5 829 if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE)
5aa33553
ES		 830 ucode_rate |= RATE_MCS_CCK_MSK;
831 return ucode_rate;
d310e405
ES		 832 }
833
5aa33553 834 if (is_ht(rate)) {
d310e405 835 if (index < IWL_FIRST_HT_RATE || index > IWL_LAST_HT_RATE) {
8ca151b5 836 IWL_ERR(mvm, "Invalid HT rate index %d\n", index);
4e82dd3a 837 index = IWL_LAST_HT_RATE;
8ca151b5 838 }
5aa33553 839 ucode_rate |= RATE_MCS_HT_MSK;
8ca151b5 840
5aa33553
ES		 841 if (is_ht_siso(rate))
842 ucode_rate |= iwl_rates[index].plcp_ht_siso;
843 else if (is_ht_mimo2(rate))
844 ucode_rate |= iwl_rates[index].plcp_ht_mimo2;
8ca151b5 845 else
d972ab31 846 WARN_ON_ONCE(1);
5aa33553 847 } else if (is_vht(rate)) {
d310e405
ES		 848 if (index < IWL_FIRST_VHT_RATE || index > IWL_LAST_VHT_RATE) {
849 IWL_ERR(mvm, "Invalid VHT rate index %d\n", index);
850 index = IWL_LAST_VHT_RATE;
851 }
5aa33553
ES		 852 ucode_rate |= RATE_MCS_VHT_MSK;
853 if (is_vht_siso(rate))
854 ucode_rate |= iwl_rates[index].plcp_vht_siso;
855 else if (is_vht_mimo2(rate))
856 ucode_rate |= iwl_rates[index].plcp_vht_mimo2;
d310e405
ES		 857 else
858 WARN_ON_ONCE(1);
859
8ca151b5 860 } else {
5aa33553 861 IWL_ERR(mvm, "Invalid rate->type %d\n", rate->type);
8ca151b5
JB		 862 }
863
d8bafeaf
ES		 864 if (is_siso(rate) && rate->stbc) {
865 /* To enable STBC we need to set both a flag and ANT_AB */
866 ucode_rate |= RATE_MCS_ANT_AB_MSK;
77e40945 867 ucode_rate |= RATE_MCS_STBC_MSK;
d8bafeaf
ES		 868 }
869
5aa33553
ES		 870 ucode_rate |= rate->bw;
871 if (rate->sgi)
872 ucode_rate |= RATE_MCS_SGI_MSK;
a3576ff2
ES		 873 if (rate->ldpc)
874 ucode_rate |= RATE_MCS_LDPC_MSK;
d310e405 875
5aa33553 876 return ucode_rate;
8ca151b5
JB		 877}
878
5aa33553
ES		 879/* Convert a ucode rate into an rs_rate object */
880static int rs_rate_from_ucode_rate(const u32 ucode_rate,
57fbcce3 881 enum nl80211_band band,
5aa33553 882 struct rs_rate *rate)
8ca151b5 883{
5aa33553
ES		 884 u32 ant_msk = ucode_rate & RATE_MCS_ANT_ABC_MSK;
885 u8 num_of_ant = get_num_of_ant_from_rate(ucode_rate);
d310e405 886 u8 nss;
8ca151b5 887
9e898f1b 888 memset(rate, 0, sizeof(*rate));
5aa33553 889 rate->index = iwl_hwrate_to_plcp_idx(ucode_rate);
8ca151b5 890
560843f4 891 if (rate->index == IWL_RATE_INVALID)
8ca151b5 892 return -EINVAL;
5aa33553
ES		 893
894 rate->ant = (ant_msk >> RATE_MCS_ANT_POS);
8ca151b5 895
d310e405 896 /* Legacy */
5aa33553 897 if (!(ucode_rate & RATE_MCS_HT_MSK) &&
514c3069
LC		 898 !(ucode_rate & RATE_MCS_VHT_MSK) &&
899 !(ucode_rate & RATE_MCS_HE_MSK)) {
8ca151b5 900 if (num_of_ant == 1) {
57fbcce3 901 if (band == NL80211_BAND_5GHZ)
5aa33553 902 rate->type = LQ_LEGACY_A;
8ca151b5 903 else
5aa33553 904 rate->type = LQ_LEGACY_G;
8ca151b5 905 }
d310e405
ES		 906
907 return 0;
908 }
909
514c3069 910 /* HT, VHT or HE */
5aa33553
ES		 911 if (ucode_rate & RATE_MCS_SGI_MSK)
912 rate->sgi = true;
a3576ff2
ES		 913 if (ucode_rate & RATE_MCS_LDPC_MSK)
914 rate->ldpc = true;
77e40945 915 if (ucode_rate & RATE_MCS_STBC_MSK)
d8bafeaf 916 rate->stbc = true;
ba69d0e3
ES		 917 if (ucode_rate & RATE_MCS_BF_MSK)
918 rate->bfer = true;
d310e405 919
5aa33553 920 rate->bw = ucode_rate & RATE_MCS_CHAN_WIDTH_MSK;
d310e405 921
5aa33553
ES		 922 if (ucode_rate & RATE_MCS_HT_MSK) {
923 nss = ((ucode_rate & RATE_HT_MCS_NSS_MSK) >>
d310e405
ES		 924 RATE_HT_MCS_NSS_POS) + 1;
925
926 if (nss == 1) {
5aa33553 927 rate->type = LQ_HT_SISO;
ba69d0e3
ES		 928 WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1,
929 "stbc %d bfer %d",
930 rate->stbc, rate->bfer);
d310e405 931 } else if (nss == 2) {
5aa33553 932 rate->type = LQ_HT_MIMO2;
d310e405 933 WARN_ON_ONCE(num_of_ant != 2);
8ca151b5 934 } else {
d310e405
ES		 935 WARN_ON_ONCE(1);
936 }
5aa33553
ES		 937 } else if (ucode_rate & RATE_MCS_VHT_MSK) {
938 nss = ((ucode_rate & RATE_VHT_MCS_NSS_MSK) >>
d310e405
ES		 939 RATE_VHT_MCS_NSS_POS) + 1;
940
941 if (nss == 1) {
5aa33553 942 rate->type = LQ_VHT_SISO;
ba69d0e3
ES		 943 WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1,
944 "stbc %d bfer %d",
945 rate->stbc, rate->bfer);
d310e405 946 } else if (nss == 2) {
5aa33553 947 rate->type = LQ_VHT_MIMO2;
d310e405
ES		 948 WARN_ON_ONCE(num_of_ant != 2);
949 } else {
950 WARN_ON_ONCE(1);
8ca151b5 951 }
514c3069
LC		 952 } else if (ucode_rate & RATE_MCS_HE_MSK) {
953 nss = ((ucode_rate & RATE_VHT_MCS_NSS_MSK) >>
954 RATE_VHT_MCS_NSS_POS) + 1;
955
956 if (nss == 1) {
957 rate->type = LQ_HE_SISO;
958 WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1,
959 "stbc %d bfer %d", rate->stbc, rate->bfer);
960 } else if (nss == 2) {
961 rate->type = LQ_HE_MIMO2;
962 WARN_ON_ONCE(num_of_ant != 2);
963 } else {
964 WARN_ON_ONCE(1);
965 }
8ca151b5 966 }
d310e405 967
5aa33553 968 WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_80 &&
514c3069 969 !is_he(rate) && !is_vht(rate));
d310e405 970
8ca151b5
JB		 971 return 0;
972}
973
974/* switch to another antenna/antennas and return 1 */
975/* if no other valid antenna found, return 0 */
8fc7c58c 976static int rs_toggle_antenna(u32 valid_ant, struct rs_rate *rate)
8ca151b5
JB		 977{
978 u8 new_ant_type;
979
82d2b9a6 980 if (!rate->ant || WARN_ON_ONCE(rate->ant & ANT_C))
8ca151b5
JB		 981 return 0;
982
5aa33553 983 if (!rs_is_valid_ant(valid_ant, rate->ant))
8ca151b5
JB		 984 return 0;
985
5aa33553 986 new_ant_type = ant_toggle_lookup[rate->ant];
8ca151b5 987
5aa33553 988 while ((new_ant_type != rate->ant) &&
8ca151b5
JB		 989 !rs_is_valid_ant(valid_ant, new_ant_type))
990 new_ant_type = ant_toggle_lookup[new_ant_type];
991
5aa33553 992 if (new_ant_type == rate->ant)
8ca151b5
JB		 993 return 0;
994
5aa33553
ES		 995 rate->ant = new_ant_type;
996
8ca151b5
JB		 997 return 1;
998}
999
8ca151b5 1000static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta,
5aa33553 1001 struct rs_rate *rate)
8ca151b5 1002{
5aa33553 1003 if (is_legacy(rate))
8ca151b5 1004 return lq_sta->active_legacy_rate;
5aa33553 1005 else if (is_siso(rate))
d310e405 1006 return lq_sta->active_siso_rate;
5aa33553 1007 else if (is_mimo2(rate))
d310e405
ES		 1008 return lq_sta->active_mimo2_rate;
1009
1010 WARN_ON_ONCE(1);
1011 return 0;
8ca151b5
JB		 1012}
1013
1014static u16 rs_get_adjacent_rate(struct iwl_mvm *mvm, u8 index, u16 rate_mask,
1015 int rate_type)
1016{
1017 u8 high = IWL_RATE_INVALID;
1018 u8 low = IWL_RATE_INVALID;
1019
1020 /* 802.11A or ht walks to the next literal adjacent rate in
1021 * the rate table */
5aa33553 1022 if (is_type_a_band(rate_type) || !is_type_legacy(rate_type)) {
8ca151b5
JB		 1023 int i;
1024 u32 mask;
1025
1026 /* Find the previous rate that is in the rate mask */
1027 i = index - 1;
43d59a4c
EG		 1028 if (i >= 0)
1029 mask = BIT(i);
1030 for (; i >= 0; i--, mask >>= 1) {
8ca151b5
JB		 1031 if (rate_mask & mask) {
1032 low = i;
1033 break;
1034 }
1035 }
1036
1037 /* Find the next rate that is in the rate mask */
1038 i = index + 1;
1039 for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) {
1040 if (rate_mask & mask) {
1041 high = i;
1042 break;
1043 }
1044 }
1045
1046 return (high << 8) | low;
1047 }
1048
1049 low = index;
1050 while (low != IWL_RATE_INVALID) {
1051 low = iwl_rates[low].prev_rs;
1052 if (low == IWL_RATE_INVALID)
1053 break;
1054 if (rate_mask & (1 << low))
1055 break;
8ca151b5
JB		 1056 }
1057
1058 high = index;
1059 while (high != IWL_RATE_INVALID) {
1060 high = iwl_rates[high].next_rs;
1061 if (high == IWL_RATE_INVALID)
1062 break;
1063 if (rate_mask & (1 << high))
1064 break;
8ca151b5
JB		 1065 }
1066
1067 return (high << 8) | low;
1068}
1069
e07be6d3
ES		 1070static inline bool rs_rate_supported(struct iwl_lq_sta *lq_sta,
1071 struct rs_rate *rate)
8ca151b5 1072{
e07be6d3
ES		 1073 return BIT(rate->index) & rs_get_supported_rates(lq_sta, rate);
1074}
1075
1076/* Get the next supported lower rate in the current column.
1077 * Return true if bottom rate in the current column was reached
1078 */
1079static bool rs_get_lower_rate_in_column(struct iwl_lq_sta *lq_sta,
1080 struct rs_rate *rate)
1081{
1082 u8 low;
8ca151b5 1083 u16 high_low;
e07be6d3 1084 u16 rate_mask;
ae969afe 1085 struct iwl_mvm *mvm = lq_sta->pers.drv;
e07be6d3
ES		 1086
1087 rate_mask = rs_get_supported_rates(lq_sta, rate);
1088 high_low = rs_get_adjacent_rate(mvm, rate->index, rate_mask,
1089 rate->type);
1090 low = high_low & 0xff;
1091
1092 /* Bottom rate of column reached */
1093 if (low == IWL_RATE_INVALID)
1094 return true;
1095
1096 rate->index = low;
1097 return false;
1098}
1099
1100/* Get the next rate to use following a column downgrade */
1101static void rs_get_lower_rate_down_column(struct iwl_lq_sta *lq_sta,
1102 struct rs_rate *rate)
1103{
ae969afe 1104 struct iwl_mvm *mvm = lq_sta->pers.drv;
8ca151b5 1105
e07be6d3
ES		 1106 if (is_legacy(rate)) {
1107 /* No column to downgrade from Legacy */
1108 return;
1109 } else if (is_siso(rate)) {
1110 /* Downgrade to Legacy if we were in SISO */
57fbcce3 1111 if (lq_sta->band == NL80211_BAND_5GHZ)
5aa33553 1112 rate->type = LQ_LEGACY_A;
8ca151b5 1113 else
5aa33553 1114 rate->type = LQ_LEGACY_G;
8ca151b5 1115
a56db7d1 1116 rate->bw = RATE_MCS_CHAN_WIDTH_20;
8ca151b5 1117
b800040d 1118 WARN_ON_ONCE(rate->index < IWL_RATE_MCS_0_INDEX ||
e07be6d3 1119 rate->index > IWL_RATE_MCS_9_INDEX);
8ca151b5 1120
e07be6d3 1121 rate->index = rs_ht_to_legacy[rate->index];
a3576ff2 1122 rate->ldpc = false;
e07be6d3
ES		 1123 } else {
1124 /* Downgrade to SISO with same MCS if in MIMO */
1125 rate->type = is_vht_mimo2(rate) ?
1126 LQ_VHT_SISO : LQ_HT_SISO;
8ca151b5
JB		 1127 }
1128
e07be6d3 1129 if (num_of_ant(rate->ant) > 1)
a0544272 1130 rate->ant = first_antenna(iwl_mvm_get_valid_tx_ant(mvm));
8ca151b5 1131
e07be6d3
ES		 1132 /* Relevant in both switching to SISO or Legacy */
1133 rate->sgi = false;
1134
1135 if (!rs_rate_supported(lq_sta, rate))
1136 rs_get_lower_rate_in_column(lq_sta, rate);
8ca151b5
JB		 1137}
1138
929e6ede
ES		 1139/* Check if both rates share the same column */
1140static inline bool rs_rate_column_match(struct rs_rate *a,
1141 struct rs_rate *b)
8ca151b5 1142{
d8bafeaf
ES		 1143 bool ant_match;
1144
ba69d0e3 1145 if (a->stbc || a->bfer)
d8bafeaf
ES		 1146 ant_match = (b->ant == ANT_A || b->ant == ANT_B);
1147 else
1148 ant_match = (a->ant == b->ant);
1149
1150 return (a->type == b->type) && (a->bw == b->bw) && (a->sgi == b->sgi)
1151 && ant_match;
8ca151b5
JB		 1152}
1153
ad82d8a5
ES		 1154static inline enum rs_column rs_get_column_from_rate(struct rs_rate *rate)
1155{
1156 if (is_legacy(rate)) {
1157 if (rate->ant == ANT_A)
1158 return RS_COLUMN_LEGACY_ANT_A;
1159
1160 if (rate->ant == ANT_B)
1161 return RS_COLUMN_LEGACY_ANT_B;
1162
1163 goto err;
1164 }
1165
1166 if (is_siso(rate)) {
1167 if (rate->ant == ANT_A || rate->stbc || rate->bfer)
1168 return rate->sgi ? RS_COLUMN_SISO_ANT_A_SGI :
1169 RS_COLUMN_SISO_ANT_A;
1170
1171 if (rate->ant == ANT_B)
1172 return rate->sgi ? RS_COLUMN_SISO_ANT_B_SGI :
1173 RS_COLUMN_SISO_ANT_B;
1174
1175 goto err;
1176 }
1177
1178 if (is_mimo(rate))
1179 return rate->sgi ? RS_COLUMN_MIMO2_SGI : RS_COLUMN_MIMO2;
1180
1181err:
1182 return RS_COLUMN_INVALID;
1183}
1184
1ebc8f2e
ES		 1185static u8 rs_get_tid(struct ieee80211_hdr *hdr)
1186{
1187 u8 tid = IWL_MAX_TID_COUNT;
1188
1189 if (ieee80211_is_data_qos(hdr->frame_control)) {
1190 u8 *qc = ieee80211_get_qos_ctl(hdr);
1191 tid = qc[0] & 0xf;
1192 }
1193
1194 if (unlikely(tid > IWL_MAX_TID_COUNT))
1195 tid = IWL_MAX_TID_COUNT;
1196
1197 return tid;
1198}
1199
1ebc8f2e
ES		 1200/*
1201 * mac80211 sends us Tx status
1202 */
9f66a397
GG		 1203static void rs_drv_mac80211_tx_status(void *mvm_r,
1204 struct ieee80211_supported_band *sband,
1205 struct ieee80211_sta *sta, void *priv_sta,
1206 struct sk_buff *skb)
1ebc8f2e
ES		 1207{
1208 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
9f66a397 1209 struct iwl_op_mode *op_mode = mvm_r;
1ebc8f2e
ES		 1210 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1211 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
0f8084cd 1212 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1ebc8f2e 1213
0f8084cd 1214 if (!mvmsta->vif)
dcbc17ad
JB		 1215 return;
1216
1ebc8f2e
ES		 1217 if (!ieee80211_is_data(hdr->frame_control) ||
1218 info->flags & IEEE80211_TX_CTL_NO_ACK)
1219 return;
1220
ff7a68d0
MG		 1221 iwl_mvm_rs_tx_status(mvm, sta, rs_get_tid(hdr), info,
1222 ieee80211_is_qos_nullfunc(hdr->frame_control));
8ca151b5
JB		 1223}
1224
1225/*
1226 * Begin a period of staying with a selected modulation mode.
1227 * Set "stay_in_tbl" flag to prevent any mode switches.
1228 * Set frame tx success limits according to legacy vs. high-throughput,
1229 * and reset overall (spanning all rates) tx success history statistics.
1230 * These control how long we stay using same modulation mode before
1231 * searching for a new mode.
1232 */
1233static void rs_set_stay_in_table(struct iwl_mvm *mvm, u8 is_legacy,
1234 struct iwl_lq_sta *lq_sta)
1235{
b3b06a32
ES		 1236 IWL_DEBUG_RATE(mvm, "Moving to RS_STATE_STAY_IN_COLUMN\n");
1237 lq_sta->rs_state = RS_STATE_STAY_IN_COLUMN;
8ca151b5 1238 if (is_legacy) {
834437da
ES		 1239 lq_sta->table_count_limit = IWL_MVM_RS_LEGACY_TABLE_COUNT;
1240 lq_sta->max_failure_limit = IWL_MVM_RS_LEGACY_FAILURE_LIMIT;
1241 lq_sta->max_success_limit = IWL_MVM_RS_LEGACY_SUCCESS_LIMIT;
8ca151b5 1242 } else {
834437da
ES		 1243 lq_sta->table_count_limit = IWL_MVM_RS_NON_LEGACY_TABLE_COUNT;
1244 lq_sta->max_failure_limit = IWL_MVM_RS_NON_LEGACY_FAILURE_LIMIT;
1245 lq_sta->max_success_limit = IWL_MVM_RS_NON_LEGACY_SUCCESS_LIMIT;
8ca151b5
JB		 1246 }
1247 lq_sta->table_count = 0;
1248 lq_sta->total_failed = 0;
1249 lq_sta->total_success = 0;
1250 lq_sta->flush_timer = jiffies;
b3b06a32 1251 lq_sta->visited_columns = 0;
8ca151b5
JB		 1252}
1253
6a028d9a
ES		 1254static inline int rs_get_max_rate_from_mask(unsigned long rate_mask)
1255{
1256 if (rate_mask)
1257 return find_last_bit(&rate_mask, BITS_PER_LONG);
1258 return IWL_RATE_INVALID;
1259}
1260
198266a3
ES		 1261static int rs_get_max_allowed_rate(struct iwl_lq_sta *lq_sta,
1262 const struct rs_tx_column *column)
1263{
1264 switch (column->mode) {
1265 case RS_LEGACY:
1266 return lq_sta->max_legacy_rate_idx;
1267 case RS_SISO:
1268 return lq_sta->max_siso_rate_idx;
1269 case RS_MIMO2:
1270 return lq_sta->max_mimo2_rate_idx;
1271 default:
1272 WARN_ON_ONCE(1);
1273 }
1274
1275 return lq_sta->max_legacy_rate_idx;
1276}
1277
a34529e8 1278static const u16 *rs_get_expected_tpt_table(struct iwl_lq_sta *lq_sta,
198266a3
ES		 1279 const struct rs_tx_column *column,
1280 u32 bw)
8ca151b5
JB		 1281{
1282 /* Used to choose among HT tables */
a34529e8 1283 const u16 (*ht_tbl_pointer)[IWL_RATE_COUNT];
8ca151b5 1284
b3b06a32
ES		 1285 if (WARN_ON_ONCE(column->mode != RS_LEGACY &&
1286 column->mode != RS_SISO &&
1287 column->mode != RS_MIMO2))
1288 return expected_tpt_legacy;
8ca151b5
JB		 1289
1290 /* Legacy rates have only one table */
b3b06a32
ES		 1291 if (column->mode == RS_LEGACY)
1292 return expected_tpt_legacy;
8ca151b5 1293
d310e405 1294 ht_tbl_pointer = expected_tpt_mimo2_20MHz;
8ca151b5 1295 /* Choose among many HT tables depending on number of streams
d310e405 1296 * (SISO/MIMO2), channel width (20/40/80), SGI, and aggregation
8ca151b5 1297 * status */
b3b06a32
ES		 1298 if (column->mode == RS_SISO) {
1299 switch (bw) {
d310e405
ES		 1300 case RATE_MCS_CHAN_WIDTH_20:
1301 ht_tbl_pointer = expected_tpt_siso_20MHz;
1302 break;
1303 case RATE_MCS_CHAN_WIDTH_40:
1304 ht_tbl_pointer = expected_tpt_siso_40MHz;
1305 break;
1306 case RATE_MCS_CHAN_WIDTH_80:
1307 ht_tbl_pointer = expected_tpt_siso_80MHz;
1308 break;
855f492f
GG		 1309 case RATE_MCS_CHAN_WIDTH_160:
1310 ht_tbl_pointer = expected_tpt_siso_160MHz;
1311 break;
d310e405
ES		 1312 default:
1313 WARN_ON_ONCE(1);
1314 }
b3b06a32
ES		 1315 } else if (column->mode == RS_MIMO2) {
1316 switch (bw) {
d310e405
ES		 1317 case RATE_MCS_CHAN_WIDTH_20:
1318 ht_tbl_pointer = expected_tpt_mimo2_20MHz;
1319 break;
1320 case RATE_MCS_CHAN_WIDTH_40:
1321 ht_tbl_pointer = expected_tpt_mimo2_40MHz;
1322 break;
1323 case RATE_MCS_CHAN_WIDTH_80:
1324 ht_tbl_pointer = expected_tpt_mimo2_80MHz;
1325 break;
855f492f
GG		 1326 case RATE_MCS_CHAN_WIDTH_160:
1327 ht_tbl_pointer = expected_tpt_mimo2_160MHz;
1328 break;
d310e405
ES		 1329 default:
1330 WARN_ON_ONCE(1);
1331 }
1332 } else {
1333 WARN_ON_ONCE(1);
d972ab31 1334 }
8ca151b5 1335
b3b06a32
ES		 1336 if (!column->sgi && !lq_sta->is_agg) /* Normal */
1337 return ht_tbl_pointer[0];
1338 else if (column->sgi && !lq_sta->is_agg) /* SGI */
1339 return ht_tbl_pointer[1];
1340 else if (!column->sgi && lq_sta->is_agg) /* AGG */
1341 return ht_tbl_pointer[2];
8ca151b5 1342 else /* AGG+SGI */
b3b06a32
ES		 1343 return ht_tbl_pointer[3];
1344}
1345
1346static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta,
1347 struct iwl_scale_tbl_info *tbl)
1348{
1349 struct rs_rate *rate = &tbl->rate;
1350 const struct rs_tx_column *column = &rs_tx_columns[tbl->column];
1351
1352 tbl->expected_tpt = rs_get_expected_tpt_table(lq_sta, column, rate->bw);
8ca151b5
JB		 1353}
1354
514ea05b
GG		 1355/* rs uses two tables, one is active and the second is for searching better
1356 * configuration. This function, according to the index of the currently
1357 * active table returns the search table, which is located at the
1358 * index complementary to 1 according to the active table (active = 1,
1359 * search = 0 or active = 0, search = 1).
1360 * Since lq_info is an arary of size 2, make sure index cannot be out of bounds.
1361 */
1362static inline u8 rs_search_tbl(u8 active_tbl)
1363{
1364 return (active_tbl ^ 1) & 1;
1365}
1366
8ca151b5
JB		 1367static s32 rs_get_best_rate(struct iwl_mvm *mvm,
1368 struct iwl_lq_sta *lq_sta,
1369 struct iwl_scale_tbl_info *tbl, /* "search" */
80763515 1370 unsigned long rate_mask, s8 index)
8ca151b5 1371{
8ca151b5
JB		 1372 struct iwl_scale_tbl_info *active_tbl =
1373 &(lq_sta->lq_info[lq_sta->active_tbl]);
80763515
ES		 1374 s32 success_ratio = active_tbl->win[index].success_ratio;
1375 u16 expected_current_tpt = active_tbl->expected_tpt[index];
a34529e8 1376 const u16 *tpt_tbl = tbl->expected_tpt;
8ca151b5 1377 u16 high_low;
80763515
ES		 1378 u32 target_tpt;
1379 int rate_idx;
8ca151b5 1380
ed21a384 1381 if (success_ratio >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) {
80763515
ES		 1382 target_tpt = 100 * expected_current_tpt;
1383 IWL_DEBUG_RATE(mvm,
1384 "SR %d high. Find rate exceeding EXPECTED_CURRENT %d\n",
1385 success_ratio, target_tpt);
1386 } else {
1387 target_tpt = lq_sta->last_tpt;
1388 IWL_DEBUG_RATE(mvm,
ed21a384 1389 "SR %d not that good. Find rate exceeding ACTUAL_TPT %d\n",
80763515
ES		 1390 success_ratio, target_tpt);
1391 }
8ca151b5 1392
80763515 1393 rate_idx = find_first_bit(&rate_mask, BITS_PER_LONG);
8ca151b5 1394
80763515
ES		 1395 while (rate_idx != IWL_RATE_INVALID) {
1396 if (target_tpt < (100 * tpt_tbl[rate_idx]))
1397 break;
8ca151b5 1398
80763515
ES		 1399 high_low = rs_get_adjacent_rate(mvm, rate_idx, rate_mask,
1400 tbl->rate.type);
8ca151b5 1401
80763515 1402 rate_idx = (high_low >> 8) & 0xff;
8ca151b5
JB		 1403 }
1404
80763515
ES		 1405 IWL_DEBUG_RATE(mvm, "Best rate found %d target_tp %d expected_new %d\n",
1406 rate_idx, target_tpt,
1407 rate_idx != IWL_RATE_INVALID ?
1408 100 * tpt_tbl[rate_idx] : IWL_INVALID_VALUE);
1409
1410 return rate_idx;
8ca151b5
JB		 1411}
1412
5aa33553 1413static u32 rs_bw_from_sta_bw(struct ieee80211_sta *sta)
d310e405 1414{
a53b2a0b
JB		 1415 struct ieee80211_sta_vht_cap *sta_vht_cap = &sta->vht_cap;
1416 struct ieee80211_vht_cap vht_cap = {
1417 .vht_cap_info = cpu_to_le32(sta_vht_cap->cap),
1418 .supp_mcs = sta_vht_cap->vht_mcs,
1419 };
1420
855f492f
GG		 1421 switch (sta->bandwidth) {
1422 case IEEE80211_STA_RX_BW_160:
a53b2a0b
JB		 1423 /*
1424 * Don't use 160 MHz if VHT extended NSS support
1425 * says we cannot use 2 streams, we don't want to
1426 * deal with this.
1427 * We only check MCS 0 - they will support that if
1428 * we got here at all and we don't care which MCS,
1429 * we want to determine a more global state.
1430 */
1431 if (ieee80211_get_vht_max_nss(&vht_cap,
1432 IEEE80211_VHT_CHANWIDTH_160MHZ,
1433 0, true) < sta->rx_nss)
1434 return RATE_MCS_CHAN_WIDTH_80;
855f492f
GG		 1435 return RATE_MCS_CHAN_WIDTH_160;
1436 case IEEE80211_STA_RX_BW_80:
5aa33553 1437 return RATE_MCS_CHAN_WIDTH_80;
855f492f 1438 case IEEE80211_STA_RX_BW_40:
5aa33553 1439 return RATE_MCS_CHAN_WIDTH_40;
855f492f
GG		 1440 case IEEE80211_STA_RX_BW_20:
1441 default:
1442 return RATE_MCS_CHAN_WIDTH_20;
1443 }
d310e405
ES		 1444}
1445
8ca151b5
JB		 1446/*
1447 * Check whether we should continue using same modulation mode, or
1448 * begin search for a new mode, based on:
1449 * 1) # tx successes or failures while using this mode
1450 * 2) # times calling this function
1451 * 3) elapsed time in this mode (not used, for now)
1452 */
1453static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search)
1454{
1455 struct iwl_scale_tbl_info *tbl;
8ca151b5
JB		 1456 int active_tbl;
1457 int flush_interval_passed = 0;
1458 struct iwl_mvm *mvm;
1459
ae969afe 1460 mvm = lq_sta->pers.drv;
8ca151b5
JB		 1461 active_tbl = lq_sta->active_tbl;
1462
1463 tbl = &(lq_sta->lq_info[active_tbl]);
1464
1465 /* If we've been disallowing search, see if we should now allow it */
b3b06a32 1466 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {
8ca151b5
JB		 1467 /* Elapsed time using current modulation mode */
1468 if (lq_sta->flush_timer)
1469 flush_interval_passed =
1470 time_after(jiffies,
1471 (unsigned long)(lq_sta->flush_timer +
834437da 1472 (IWL_MVM_RS_STAY_IN_COLUMN_TIMEOUT * HZ)));
8ca151b5
JB		 1473
1474 /*
1475 * Check if we should allow search for new modulation mode.
1476 * If many frames have failed or succeeded, or we've used
1477 * this same modulation for a long time, allow search, and
1478 * reset history stats that keep track of whether we should
1479 * allow a new search. Also (below) reset all bitmaps and
1480 * stats in active history.
1481 */
1482 if (force_search ||
1483 (lq_sta->total_failed > lq_sta->max_failure_limit) ||
1484 (lq_sta->total_success > lq_sta->max_success_limit) ||
1485 ((!lq_sta->search_better_tbl) &&
1486 (lq_sta->flush_timer) && (flush_interval_passed))) {
1487 IWL_DEBUG_RATE(mvm,
1488 "LQ: stay is expired %d %d %d\n",
1489 lq_sta->total_failed,
1490 lq_sta->total_success,
1491 flush_interval_passed);
1492
1493 /* Allow search for new mode */
b3b06a32
ES		 1494 lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_STARTED;
1495 IWL_DEBUG_RATE(mvm,
1496 "Moving to RS_STATE_SEARCH_CYCLE_STARTED\n");
8ca151b5
JB		 1497 lq_sta->total_failed = 0;
1498 lq_sta->total_success = 0;
1499 lq_sta->flush_timer = 0;
b3b06a32
ES		 1500 /* mark the current column as visited */
1501 lq_sta->visited_columns = BIT(tbl->column);
8ca151b5
JB		 1502 /*
1503 * Else if we've used this modulation mode enough repetitions
1504 * (regardless of elapsed time or success/failure), reset
1505 * history bitmaps and rate-specific stats for all rates in
1506 * active table.
1507 */
1508 } else {
1509 lq_sta->table_count++;
1510 if (lq_sta->table_count >=
1511 lq_sta->table_count_limit) {
1512 lq_sta->table_count = 0;
1513
1514 IWL_DEBUG_RATE(mvm,
1515 "LQ: stay in table clear win\n");
b804eeb6 1516 rs_rate_scale_clear_tbl_windows(mvm, tbl);
8ca151b5
JB		 1517 }
1518 }
1519
1520 /* If transitioning to allow "search", reset all history
1521 * bitmaps and stats in active table (this will become the new
1522 * "search" table). */
b3b06a32 1523 if (lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED) {
b804eeb6 1524 rs_rate_scale_clear_tbl_windows(mvm, tbl);
8ca151b5
JB		 1525 }
1526 }
1527}
1528
04e3a5da
EG		 1529static void rs_set_amsdu_len(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1530 struct iwl_scale_tbl_info *tbl,
1531 enum rs_action scale_action)
1532{
7ccb498c 1533 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
438af969 1534 int i;
04e3a5da 1535
84226ca1
GG		 1536 /*
1537 * In case TLC offload is not active amsdu_enabled is either 0xFFFF
1538 * or 0, since there is no per-TID alg.
1539 */
04e3a5da
EG		 1540 if ((!is_vht(&tbl->rate) && !is_ht(&tbl->rate)) ||
1541 tbl->rate.index < IWL_RATE_MCS_5_INDEX ||
1542 scale_action == RS_ACTION_DOWNSCALE)
84226ca1 1543 mvmsta->amsdu_enabled = 0;
04e3a5da 1544 else
84226ca1
GG		 1545 mvmsta->amsdu_enabled = 0xFFFF;
1546
679bff23
SS		 1547 if (mvmsta->vif->bss_conf.he_support &&
1548 !iwlwifi_mod_params.disable_11ax)
1549 mvmsta->max_amsdu_len = sta->max_amsdu_len;
1550 else
1551 mvmsta->max_amsdu_len = min_t(int, sta->max_amsdu_len, 8500);
1552
438af969
SS		 1553 sta->max_rc_amsdu_len = mvmsta->max_amsdu_len;
1554
1555 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1556 if (mvmsta->amsdu_enabled)
1557 sta->max_tid_amsdu_len[i] =
1558 iwl_mvm_max_amsdu_size(mvm, sta, i);
1559 else
1560 /*
1561 * Not so elegant, but this will effectively
1562 * prevent AMSDU on this TID
1563 */
1564 sta->max_tid_amsdu_len[i] = 1;
1565 }
04e3a5da
EG		 1566}
1567
8ca151b5
JB		 1568/*
1569 * setup rate table in uCode
1570 */
1571static void rs_update_rate_tbl(struct iwl_mvm *mvm,
9145d151 1572 struct ieee80211_sta *sta,
8ca151b5 1573 struct iwl_lq_sta *lq_sta,
7b9d74e4 1574 struct iwl_scale_tbl_info *tbl)
8ca151b5 1575{
7b9d74e4 1576 rs_fill_lq_cmd(mvm, sta, lq_sta, &tbl->rate);
cd4d6b0b 1577 iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq);
8ca151b5
JB		 1578}
1579
1191f646
ES		 1580static bool rs_tweak_rate_tbl(struct iwl_mvm *mvm,
1581 struct ieee80211_sta *sta,
1582 struct iwl_lq_sta *lq_sta,
1583 struct iwl_scale_tbl_info *tbl,
1584 enum rs_action scale_action)
1585{
a53b2a0b 1586 if (rs_bw_from_sta_bw(sta) != RATE_MCS_CHAN_WIDTH_80)
1191f646
ES		 1587 return false;
1588
1589 if (!is_vht_siso(&tbl->rate))
1590 return false;
1591
1592 if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_80) &&
1593 (tbl->rate.index == IWL_RATE_MCS_0_INDEX) &&
1594 (scale_action == RS_ACTION_DOWNSCALE)) {
1595 tbl->rate.bw = RATE_MCS_CHAN_WIDTH_20;
1596 tbl->rate.index = IWL_RATE_MCS_4_INDEX;
1597 IWL_DEBUG_RATE(mvm, "Switch 80Mhz SISO MCS0 -> 20Mhz MCS4\n");
1598 goto tweaked;
1599 }
1600
1601 /* Go back to 80Mhz MCS1 only if we've established that 20Mhz MCS5 is
1602 * sustainable, i.e. we're past the test window. We can't go back
1603 * if MCS5 is just tested as this will happen always after switching
1604 * to 20Mhz MCS4 because the rate stats are cleared.
1605 */
1606 if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_20) &&
1607 (((tbl->rate.index == IWL_RATE_MCS_5_INDEX) &&
1608 (scale_action == RS_ACTION_STAY)) ||
1609 ((tbl->rate.index > IWL_RATE_MCS_5_INDEX) &&
1610 (scale_action == RS_ACTION_UPSCALE)))) {
1611 tbl->rate.bw = RATE_MCS_CHAN_WIDTH_80;
1612 tbl->rate.index = IWL_RATE_MCS_1_INDEX;
1613 IWL_DEBUG_RATE(mvm, "Switch 20Mhz SISO MCS5 -> 80Mhz MCS1\n");
1614 goto tweaked;
1615 }
1616
1617 return false;
1618
1619tweaked:
1620 rs_set_expected_tpt_table(lq_sta, tbl);
1621 rs_rate_scale_clear_tbl_windows(mvm, tbl);
1622 return true;
1623}
1624
b3b06a32
ES		 1625static enum rs_column rs_get_next_column(struct iwl_mvm *mvm,
1626 struct iwl_lq_sta *lq_sta,
1627 struct ieee80211_sta *sta,
1628 struct iwl_scale_tbl_info *tbl)
1629{
198266a3 1630 int i, j, max_rate;
b3b06a32
ES		 1631 enum rs_column next_col_id;
1632 const struct rs_tx_column *curr_col = &rs_tx_columns[tbl->column];
1633 const struct rs_tx_column *next_col;
1634 allow_column_func_t allow_func;
a0544272 1635 u8 valid_ants = iwl_mvm_get_valid_tx_ant(mvm);
a34529e8 1636 const u16 *expected_tpt_tbl;
198266a3 1637 u16 tpt, max_expected_tpt;
b3b06a32
ES		 1638
1639 for (i = 0; i < MAX_NEXT_COLUMNS; i++) {
1640 next_col_id = curr_col->next_columns[i];
1641
1642 if (next_col_id == RS_COLUMN_INVALID)
1643 continue;
1644
1645 if (lq_sta->visited_columns & BIT(next_col_id)) {
1646 IWL_DEBUG_RATE(mvm, "Skip already visited column %d\n",
1647 next_col_id);
1648 continue;
1649 }
1650
1651 next_col = &rs_tx_columns[next_col_id];
1652
1653 if (!rs_is_valid_ant(valid_ants, next_col->ant)) {
1654 IWL_DEBUG_RATE(mvm,
1655 "Skip column %d as ANT config isn't supported by chip. valid_ants 0x%x column ant 0x%x\n",
1656 next_col_id, valid_ants, next_col->ant);
1657 continue;
1658 }
1659
1660 for (j = 0; j < MAX_COLUMN_CHECKS; j++) {
1661 allow_func = next_col->checks[j];
bb8f44c9
ES		 1662 if (allow_func && !allow_func(mvm, sta, &tbl->rate,
1663 next_col))
b3b06a32
ES		 1664 break;
1665 }
1666
1667 if (j != MAX_COLUMN_CHECKS) {
1668 IWL_DEBUG_RATE(mvm,
1669 "Skip column %d: not allowed (check %d failed)\n",
1670 next_col_id, j);
1671
1672 continue;
1673 }
1674
1675 tpt = lq_sta->last_tpt / 100;
1676 expected_tpt_tbl = rs_get_expected_tpt_table(lq_sta, next_col,
049e0c33 1677 rs_bw_from_sta_bw(sta));
b3b06a32
ES		 1678 if (WARN_ON_ONCE(!expected_tpt_tbl))
1679 continue;
1680
198266a3 1681 max_rate = rs_get_max_allowed_rate(lq_sta, next_col);
6a028d9a
ES		 1682 if (max_rate == IWL_RATE_INVALID) {
1683 IWL_DEBUG_RATE(mvm,
1684 "Skip column %d: no rate is allowed in this column\n",
1685 next_col_id);
198266a3 1686 continue;
6a028d9a 1687 }
b3b06a32 1688
198266a3 1689 max_expected_tpt = expected_tpt_tbl[max_rate];
b3b06a32
ES		 1690 if (tpt >= max_expected_tpt) {
1691 IWL_DEBUG_RATE(mvm,
1692 "Skip column %d: can't beat current TPT. Max expected %d current %d\n",
1693 next_col_id, max_expected_tpt, tpt);
1694 continue;
1695 }
1696
198266a3
ES		 1697 IWL_DEBUG_RATE(mvm,
1698 "Found potential column %d. Max expected %d current %d\n",
1699 next_col_id, max_expected_tpt, tpt);
b3b06a32
ES		 1700 break;
1701 }
1702
1703 if (i == MAX_NEXT_COLUMNS)
1704 return RS_COLUMN_INVALID;
1705
b3b06a32
ES		 1706 return next_col_id;
1707}
1708
1709static int rs_switch_to_column(struct iwl_mvm *mvm,
1710 struct iwl_lq_sta *lq_sta,
1711 struct ieee80211_sta *sta,
1712 enum rs_column col_id)
1713{
514ea05b 1714 struct iwl_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl];
b3b06a32 1715 struct iwl_scale_tbl_info *search_tbl =
514ea05b 1716 &lq_sta->lq_info[rs_search_tbl(lq_sta->active_tbl)];
b3b06a32
ES		 1717 struct rs_rate *rate = &search_tbl->rate;
1718 const struct rs_tx_column *column = &rs_tx_columns[col_id];
1719 const struct rs_tx_column *curr_column = &rs_tx_columns[tbl->column];
80763515 1720 unsigned long rate_mask = 0;
b3b06a32
ES		 1721 u32 rate_idx = 0;
1722
992172e3 1723 memcpy(search_tbl, tbl, offsetof(struct iwl_scale_tbl_info, win));
b3b06a32
ES		 1724
1725 rate->sgi = column->sgi;
1726 rate->ant = column->ant;
1727
1728 if (column->mode == RS_LEGACY) {
57fbcce3 1729 if (lq_sta->band == NL80211_BAND_5GHZ)
b3b06a32
ES		 1730 rate->type = LQ_LEGACY_A;
1731 else
1732 rate->type = LQ_LEGACY_G;
1733
d8bafeaf
ES		 1734 rate->bw = RATE_MCS_CHAN_WIDTH_20;
1735 rate->ldpc = false;
b3b06a32
ES		 1736 rate_mask = lq_sta->active_legacy_rate;
1737 } else if (column->mode == RS_SISO) {
1738 rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO;
1739 rate_mask = lq_sta->active_siso_rate;
1740 } else if (column->mode == RS_MIMO2) {
1741 rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2;
1742 rate_mask = lq_sta->active_mimo2_rate;
1743 } else {
7281b164 1744 WARN_ONCE(1, "Bad column mode");
b3b06a32
ES		 1745 }
1746
d8bafeaf
ES		 1747 if (column->mode != RS_LEGACY) {
1748 rate->bw = rs_bw_from_sta_bw(sta);
1749 rate->ldpc = lq_sta->ldpc;
1750 }
1751
b3b06a32
ES		 1752 search_tbl->column = col_id;
1753 rs_set_expected_tpt_table(lq_sta, search_tbl);
1754
75d3e2d6
ES		 1755 lq_sta->visited_columns |= BIT(col_id);
1756
b3b06a32
ES		 1757 /* Get the best matching rate if we're changing modes. e.g.
1758 * SISO->MIMO, LEGACY->SISO, MIMO->SISO
1759 */
1760 if (curr_column->mode != column->mode) {
1761 rate_idx = rs_get_best_rate(mvm, lq_sta, search_tbl,
1762 rate_mask, rate->index);
1763
1764 if ((rate_idx == IWL_RATE_INVALID) ||
1765 !(BIT(rate_idx) & rate_mask)) {
1766 IWL_DEBUG_RATE(mvm,
1767 "can not switch with index %d"
80763515 1768 " rate mask %lx\n",
b3b06a32
ES		 1769 rate_idx, rate_mask);
1770
1771 goto err;
1772 }
1773
1774 rate->index = rate_idx;
1775 }
1776
b3b06a32
ES		 1777 IWL_DEBUG_RATE(mvm, "Switched to column %d: Index %d\n",
1778 col_id, rate->index);
1779
b3b06a32
ES		 1780 return 0;
1781
1782err:
1783 rate->type = LQ_NONE;
1784 return -1;
1785}
1786
4e4b815c
ES		 1787static enum rs_action rs_get_rate_action(struct iwl_mvm *mvm,
1788 struct iwl_scale_tbl_info *tbl,
1789 s32 sr, int low, int high,
1790 int current_tpt,
1791 int low_tpt, int high_tpt)
1792{
1793 enum rs_action action = RS_ACTION_STAY;
1794
834437da
ES		 1795 if ((sr <= RS_PERCENT(IWL_MVM_RS_SR_FORCE_DECREASE)) ||
1796 (current_tpt == 0)) {
4e4b815c 1797 IWL_DEBUG_RATE(mvm,
e53839eb
ES		 1798 "Decrease rate because of low SR\n");
1799 return RS_ACTION_DOWNSCALE;
4e4b815c
ES		 1800 }
1801
e53839eb
ES		 1802 if ((low_tpt == IWL_INVALID_VALUE) &&
1803 (high_tpt == IWL_INVALID_VALUE) &&
1804 (high != IWL_RATE_INVALID)) {
4e4b815c 1805 IWL_DEBUG_RATE(mvm,
e53839eb
ES		 1806 "No data about high/low rates. Increase rate\n");
1807 return RS_ACTION_UPSCALE;
4e4b815c
ES		 1808 }
1809
e53839eb
ES		 1810 if ((high_tpt == IWL_INVALID_VALUE) &&
1811 (high != IWL_RATE_INVALID) &&
1812 (low_tpt != IWL_INVALID_VALUE) &&
1813 (low_tpt < current_tpt)) {
1814 IWL_DEBUG_RATE(mvm,
1815 "No data about high rate and low rate is worse. Increase rate\n");
1816 return RS_ACTION_UPSCALE;
1817 }
4e4b815c 1818
e53839eb
ES		 1819 if ((high_tpt != IWL_INVALID_VALUE) &&
1820 (high_tpt > current_tpt)) {
1821 IWL_DEBUG_RATE(mvm,
1822 "Higher rate is better. Increate rate\n");
1823 return RS_ACTION_UPSCALE;
4e4b815c
ES		 1824 }
1825
e53839eb
ES		 1826 if ((low_tpt != IWL_INVALID_VALUE) &&
1827 (high_tpt != IWL_INVALID_VALUE) &&
1828 (low_tpt < current_tpt) &&
1829 (high_tpt < current_tpt)) {
4e4b815c 1830 IWL_DEBUG_RATE(mvm,
e53839eb
ES		 1831 "Both high and low are worse. Maintain rate\n");
1832 return RS_ACTION_STAY;
1833 }
1834
1835 if ((low_tpt != IWL_INVALID_VALUE) &&
1836 (low_tpt > current_tpt)) {
1837 IWL_DEBUG_RATE(mvm,
1838 "Lower rate is better\n");
1839 action = RS_ACTION_DOWNSCALE;
1840 goto out;
1841 }
1842
1843 if ((low_tpt == IWL_INVALID_VALUE) &&
1844 (low != IWL_RATE_INVALID)) {
4e4b815c 1845 IWL_DEBUG_RATE(mvm,
e53839eb
ES		 1846 "No data about lower rate\n");
1847 action = RS_ACTION_DOWNSCALE;
1848 goto out;
1849 }
1850
1851 IWL_DEBUG_RATE(mvm, "Maintain rate\n");
1852
1853out:
1854 if ((action == RS_ACTION_DOWNSCALE) && (low != IWL_RATE_INVALID)) {
834437da 1855 if (sr >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) {
e53839eb
ES		 1856 IWL_DEBUG_RATE(mvm,
1857 "SR is above NO DECREASE. Avoid downscale\n");
1858 action = RS_ACTION_STAY;
1859 } else if (current_tpt > (100 * tbl->expected_tpt[low])) {
1860 IWL_DEBUG_RATE(mvm,
1861 "Current TPT is higher than max expected in low rate. Avoid downscale\n");
1862 action = RS_ACTION_STAY;
1863 } else {
1864 IWL_DEBUG_RATE(mvm, "Decrease rate\n");
1865 }
4e4b815c
ES		 1866 }
1867
1868 return action;
1869}
b3b06a32 1870
d8bafeaf
ES		 1871static bool rs_stbc_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1872 struct iwl_lq_sta *lq_sta)
1873{
d8bafeaf
ES		 1874 /* Our chip supports Tx STBC and the peer is an HT/VHT STA which
1875 * supports STBC of at least 1*SS
1876 */
3d44eebf 1877 if (!lq_sta->stbc_capable)
d8bafeaf
ES		 1878 return false;
1879
d8bafeaf
ES		 1880 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))
1881 return false;
1882
1883 return true;
1884}
1885
2fd647f8
EP		 1886static void rs_get_adjacent_txp(struct iwl_mvm *mvm, int index,
1887 int *weaker, int *stronger)
1888{
834437da 1889 *weaker = index + IWL_MVM_RS_TPC_TX_POWER_STEP;
2fd647f8
EP		 1890 if (*weaker > TPC_MAX_REDUCTION)
1891 *weaker = TPC_INVALID;
1892
834437da 1893 *stronger = index - IWL_MVM_RS_TPC_TX_POWER_STEP;
2fd647f8
EP		 1894 if (*stronger < 0)
1895 *stronger = TPC_INVALID;
1896}
1897
1e9551de 1898static bool rs_tpc_allowed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
57fbcce3 1899 struct rs_rate *rate, enum nl80211_band band)
2fd647f8
EP		 1900{
1901 int index = rate->index;
1e9551de
ES		 1902 bool cam = (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM);
1903 bool sta_ps_disabled = (vif->type == NL80211_IFTYPE_STATION &&
1904 !vif->bss_conf.ps);
2fd647f8 1905
1e9551de
ES		 1906 IWL_DEBUG_RATE(mvm, "cam: %d sta_ps_disabled %d\n",
1907 cam, sta_ps_disabled);
2fd647f8
EP		 1908 /*
1909 * allow tpc only if power management is enabled, or bt coex
1910 * activity grade allows it and we are on 2.4Ghz.
1911 */
1e9551de 1912 if ((cam || sta_ps_disabled) &&
2fd647f8
EP		 1913 !iwl_mvm_bt_coex_is_tpc_allowed(mvm, band))
1914 return false;
1915
1916 IWL_DEBUG_RATE(mvm, "check rate, table type: %d\n", rate->type);
1917 if (is_legacy(rate))
1918 return index == IWL_RATE_54M_INDEX;
1919 if (is_ht(rate))
1920 return index == IWL_RATE_MCS_7_INDEX;
1921 if (is_vht(rate))
1922 return index == IWL_RATE_MCS_7_INDEX ||
1923 index == IWL_RATE_MCS_8_INDEX ||
1924 index == IWL_RATE_MCS_9_INDEX;
1925
1926 WARN_ON_ONCE(1);
1927 return false;
1928}
1929
1930enum tpc_action {
1931 TPC_ACTION_STAY,
1932 TPC_ACTION_DECREASE,
1933 TPC_ACTION_INCREASE,
1934 TPC_ACTION_NO_RESTIRCTION,
1935};
1936
1937static enum tpc_action rs_get_tpc_action(struct iwl_mvm *mvm,
1938 s32 sr, int weak, int strong,
1939 int current_tpt,
1940 int weak_tpt, int strong_tpt)
1941{
1942 /* stay until we have valid tpt */
1943 if (current_tpt == IWL_INVALID_VALUE) {
1944 IWL_DEBUG_RATE(mvm, "no current tpt. stay.\n");
1945 return TPC_ACTION_STAY;
1946 }
1947
1948 /* Too many failures, increase txp */
834437da
ES		 1949 if (sr <= RS_PERCENT(IWL_MVM_RS_TPC_SR_FORCE_INCREASE) ||
1950 current_tpt == 0) {
2fd647f8
EP		 1951 IWL_DEBUG_RATE(mvm, "increase txp because of weak SR\n");
1952 return TPC_ACTION_NO_RESTIRCTION;
1953 }
1954
1955 /* try decreasing first if applicable */
6ad6c01f
GG		 1956 if (sr >= RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) &&
1957 weak != TPC_INVALID) {
2fd647f8
EP		 1958 if (weak_tpt == IWL_INVALID_VALUE &&
1959 (strong_tpt == IWL_INVALID_VALUE ||
1960 current_tpt >= strong_tpt)) {
1961 IWL_DEBUG_RATE(mvm,
1962 "no weak txp measurement. decrease txp\n");
1963 return TPC_ACTION_DECREASE;
1964 }
1965
1966 if (weak_tpt > current_tpt) {
1967 IWL_DEBUG_RATE(mvm,
1968 "lower txp has better tpt. decrease txp\n");
1969 return TPC_ACTION_DECREASE;
1970 }
1971 }
1972
1973 /* next, increase if needed */
834437da
ES		 1974 if (sr < RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) &&
1975 strong != TPC_INVALID) {
2fd647f8
EP		 1976 if (weak_tpt == IWL_INVALID_VALUE &&
1977 strong_tpt != IWL_INVALID_VALUE &&
1978 current_tpt < strong_tpt) {
1979 IWL_DEBUG_RATE(mvm,
1980 "higher txp has better tpt. increase txp\n");
1981 return TPC_ACTION_INCREASE;
1982 }
1983
1984 if (weak_tpt < current_tpt &&
1985 (strong_tpt == IWL_INVALID_VALUE ||
1986 strong_tpt > current_tpt)) {
1987 IWL_DEBUG_RATE(mvm,
1988 "lower txp has worse tpt. increase txp\n");
1989 return TPC_ACTION_INCREASE;
1990 }
1991 }
1992
1993 IWL_DEBUG_RATE(mvm, "no need to increase or decrease txp - stay\n");
1994 return TPC_ACTION_STAY;
1995}
1996
1997static bool rs_tpc_perform(struct iwl_mvm *mvm,
1998 struct ieee80211_sta *sta,
1999 struct iwl_lq_sta *lq_sta,
2000 struct iwl_scale_tbl_info *tbl)
2001{
9d8ce6af 2002 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2fd647f8
EP		 2003 struct ieee80211_vif *vif = mvm_sta->vif;
2004 struct ieee80211_chanctx_conf *chanctx_conf;
57fbcce3 2005 enum nl80211_band band;
2fd647f8
EP		 2006 struct iwl_rate_scale_data *window;
2007 struct rs_rate *rate = &tbl->rate;
2008 enum tpc_action action;
2009 s32 sr;
2010 u8 cur = lq_sta->lq.reduced_tpc;
2011 int current_tpt;
2012 int weak, strong;
2013 int weak_tpt = IWL_INVALID_VALUE, strong_tpt = IWL_INVALID_VALUE;
2014
9a75b3df 2015#ifdef CONFIG_MAC80211_DEBUGFS
ae969afe 2016 if (lq_sta->pers.dbg_fixed_txp_reduction <= TPC_MAX_REDUCTION) {
3c6acb61 2017 IWL_DEBUG_RATE(mvm, "fixed tpc: %d\n",
ae969afe
EP		 2018 lq_sta->pers.dbg_fixed_txp_reduction);
2019 lq_sta->lq.reduced_tpc = lq_sta->pers.dbg_fixed_txp_reduction;
2020 return cur != lq_sta->pers.dbg_fixed_txp_reduction;
9a75b3df
EP		 2021 }
2022#endif
2023
2fd647f8
EP		 2024 rcu_read_lock();
2025 chanctx_conf = rcu_dereference(vif->chanctx_conf);
2026 if (WARN_ON(!chanctx_conf))
57fbcce3 2027 band = NUM_NL80211_BANDS;
2fd647f8
EP		 2028 else
2029 band = chanctx_conf->def.chan->band;
2030 rcu_read_unlock();
2031
1e9551de 2032 if (!rs_tpc_allowed(mvm, vif, rate, band)) {
2fd647f8 2033 IWL_DEBUG_RATE(mvm,
3c6acb61 2034 "tpc is not allowed. remove txp restrictions\n");
2fd647f8
EP		 2035 lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION;
2036 return cur != TPC_NO_REDUCTION;
2037 }
2038
2039 rs_get_adjacent_txp(mvm, cur, &weak, &strong);
2040
2041 /* Collect measured throughputs for current and adjacent rates */
2042 window = tbl->tpc_win;
2043 sr = window[cur].success_ratio;
2044 current_tpt = window[cur].average_tpt;
2045 if (weak != TPC_INVALID)
2046 weak_tpt = window[weak].average_tpt;
2047 if (strong != TPC_INVALID)
2048 strong_tpt = window[strong].average_tpt;
2049
2050 IWL_DEBUG_RATE(mvm,
2051 "(TPC: %d): cur_tpt %d SR %d weak %d strong %d weak_tpt %d strong_tpt %d\n",
2052 cur, current_tpt, sr, weak, strong,
2053 weak_tpt, strong_tpt);
2054
2055 action = rs_get_tpc_action(mvm, sr, weak, strong,
2056 current_tpt, weak_tpt, strong_tpt);
2057
2058 /* override actions if we are on the edge */
2059 if (weak == TPC_INVALID && action == TPC_ACTION_DECREASE) {
3c6acb61 2060 IWL_DEBUG_RATE(mvm, "already in lowest txp, stay\n");
2fd647f8
EP		 2061 action = TPC_ACTION_STAY;
2062 } else if (strong == TPC_INVALID &&
2063 (action == TPC_ACTION_INCREASE ||
2064 action == TPC_ACTION_NO_RESTIRCTION)) {
3c6acb61 2065 IWL_DEBUG_RATE(mvm, "already in highest txp, stay\n");
2fd647f8
EP		 2066 action = TPC_ACTION_STAY;
2067 }
2068
2069 switch (action) {
2070 case TPC_ACTION_DECREASE:
2071 lq_sta->lq.reduced_tpc = weak;
2072 return true;
2073 case TPC_ACTION_INCREASE:
2074 lq_sta->lq.reduced_tpc = strong;
2075 return true;
2076 case TPC_ACTION_NO_RESTIRCTION:
2077 lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION;
2078 return true;
2079 case TPC_ACTION_STAY:
2080 /* do nothing */
2081 break;
2082 }
2083 return false;
2084}
2085
8ca151b5
JB		 2086/*
2087 * Do rate scaling and search for new modulation mode.
2088 */
2089static void rs_rate_scale_perform(struct iwl_mvm *mvm,
8ca151b5 2090 struct ieee80211_sta *sta,
1ebc8f2e 2091 struct iwl_lq_sta *lq_sta,
ff7a68d0 2092 int tid, bool ndp)
8ca151b5 2093{
8ca151b5
JB		 2094 int low = IWL_RATE_INVALID;
2095 int high = IWL_RATE_INVALID;
2096 int index;
8ca151b5
JB		 2097 struct iwl_rate_scale_data *window = NULL;
2098 int current_tpt = IWL_INVALID_VALUE;
2099 int low_tpt = IWL_INVALID_VALUE;
2100 int high_tpt = IWL_INVALID_VALUE;
2101 u32 fail_count;
4e4b815c 2102 enum rs_action scale_action = RS_ACTION_STAY;
8ca151b5
JB		 2103 u16 rate_mask;
2104 u8 update_lq = 0;
2105 struct iwl_scale_tbl_info *tbl, *tbl1;
8ca151b5
JB		 2106 u8 active_tbl = 0;
2107 u8 done_search = 0;
2108 u16 high_low;
2109 s32 sr;
9d015a03 2110 u8 prev_agg = lq_sta->is_agg;
7ccb498c 2111 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
5aa33553 2112 struct rs_rate *rate;
8ca151b5 2113
7ccb498c 2114 lq_sta->is_agg = !!mvmsta->agg_tids;
8ca151b5
JB		 2115
2116 /*
2117 * Select rate-scale / modulation-mode table to work with in
2118 * the rest of this function: "search" if searching for better
2119 * modulation mode, or "active" if doing rate scaling within a mode.
2120 */
2121 if (!lq_sta->search_better_tbl)
2122 active_tbl = lq_sta->active_tbl;
2123 else
514ea05b 2124 active_tbl = rs_search_tbl(lq_sta->active_tbl);
8ca151b5
JB		 2125
2126 tbl = &(lq_sta->lq_info[active_tbl]);
5aa33553 2127 rate = &tbl->rate;
8ca151b5 2128
9d015a03
ES		 2129 if (prev_agg != lq_sta->is_agg) {
2130 IWL_DEBUG_RATE(mvm,
2131 "Aggregation changed: prev %d current %d. Update expected TPT table\n",
2132 prev_agg, lq_sta->is_agg);
2133 rs_set_expected_tpt_table(lq_sta, tbl);
b804eeb6 2134 rs_rate_scale_clear_tbl_windows(mvm, tbl);
9d015a03
ES		 2135 }
2136
8ca151b5 2137 /* current tx rate */
fcc5e851 2138 index = rate->index;
8ca151b5 2139
8ca151b5 2140 /* rates available for this association, and for modulation mode */
a8ff14f5 2141 rate_mask = rs_get_supported_rates(lq_sta, rate);
8ca151b5 2142
ca6f38ff 2143 if (!(BIT(index) & rate_mask)) {
8ca151b5
JB		 2144 IWL_ERR(mvm, "Current Rate is not valid\n");
2145 if (lq_sta->search_better_tbl) {
2146 /* revert to active table if search table is not valid*/
5aa33553 2147 rate->type = LQ_NONE;
8ca151b5
JB		 2148 lq_sta->search_better_tbl = 0;
2149 tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
7b9d74e4 2150 rs_update_rate_tbl(mvm, sta, lq_sta, tbl);
8ca151b5
JB		 2151 }
2152 return;
2153 }
2154
2155 /* Get expected throughput table and history window for current rate */
2156 if (!tbl->expected_tpt) {
2157 IWL_ERR(mvm, "tbl->expected_tpt is NULL\n");
2158 return;
2159 }
2160
2536e7c3 2161 /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */
8ca151b5
JB		 2162 window = &(tbl->win[index]);
2163
2164 /*
2165 * If there is not enough history to calculate actual average
2166 * throughput, keep analyzing results of more tx frames, without
2167 * changing rate or mode (bypass most of the rest of this function).
2168 * Set up new rate table in uCode only if old rate is not supported
2169 * in current association (use new rate found above).
2170 */
2171 fail_count = window->counter - window->success_counter;
834437da
ES		 2172 if ((fail_count < IWL_MVM_RS_RATE_MIN_FAILURE_TH) &&
2173 (window->success_counter < IWL_MVM_RS_RATE_MIN_SUCCESS_TH)) {
8ca151b5 2174 IWL_DEBUG_RATE(mvm,
cc60c6e9
ES		 2175 "%s: Test Window: succ %d total %d\n",
2176 rs_pretty_rate(rate),
2177 window->success_counter, window->counter);
8ca151b5
JB		 2178
2179 /* Can't calculate this yet; not enough history */
2180 window->average_tpt = IWL_INVALID_VALUE;
2181
2182 /* Should we stay with this modulation mode,
2183 * or search for a new one? */
2184 rs_stay_in_table(lq_sta, false);
2185
fcc5e851 2186 return;
8ca151b5 2187 }
8ca151b5
JB		 2188
2189 /* If we are searching for better modulation mode, check success. */
2190 if (lq_sta->search_better_tbl) {
2191 /* If good success, continue using the "search" mode;
2192 * no need to send new link quality command, since we're
2193 * continuing to use the setup that we've been trying. */
2194 if (window->average_tpt > lq_sta->last_tpt) {
2195 IWL_DEBUG_RATE(mvm,
4d30ee82
ES		 2196 "SWITCHING TO NEW TABLE SR: %d "
2197 "cur-tpt %d old-tpt %d\n",
8ca151b5
JB		 2198 window->success_ratio,
2199 window->average_tpt,
2200 lq_sta->last_tpt);
2201
8ca151b5
JB		 2202 /* Swap tables; "search" becomes "active" */
2203 lq_sta->active_tbl = active_tbl;
2204 current_tpt = window->average_tpt;
2205 /* Else poor success; go back to mode in "active" table */
2206 } else {
2207 IWL_DEBUG_RATE(mvm,
4d30ee82
ES		 2208 "GOING BACK TO THE OLD TABLE: SR %d "
2209 "cur-tpt %d old-tpt %d\n",
8ca151b5
JB		 2210 window->success_ratio,
2211 window->average_tpt,
2212 lq_sta->last_tpt);
2213
2214 /* Nullify "search" table */
5aa33553 2215 rate->type = LQ_NONE;
8ca151b5
JB		 2216
2217 /* Revert to "active" table */
2218 active_tbl = lq_sta->active_tbl;
2219 tbl = &(lq_sta->lq_info[active_tbl]);
2220
2221 /* Revert to "active" rate and throughput info */
8fc7c58c 2222 index = tbl->rate.index;
8ca151b5
JB		 2223 current_tpt = lq_sta->last_tpt;
2224
2225 /* Need to set up a new rate table in uCode */
2226 update_lq = 1;
2227 }
2228
2229 /* Either way, we've made a decision; modulation mode
2230 * search is done, allow rate adjustment next time. */
2231 lq_sta->search_better_tbl = 0;
2232 done_search = 1; /* Don't switch modes below! */
2233 goto lq_update;
2234 }
2235
2236 /* (Else) not in search of better modulation mode, try for better
2237 * starting rate, while staying in this mode. */
ca6f38ff 2238 high_low = rs_get_adjacent_rate(mvm, index, rate_mask, rate->type);
8ca151b5
JB		 2239 low = high_low & 0xff;
2240 high = (high_low >> 8) & 0xff;
2241
2536e7c3 2242 /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */
8ca151b5
JB		 2243
2244 sr = window->success_ratio;
2245
2246 /* Collect measured throughputs for current and adjacent rates */
2247 current_tpt = window->average_tpt;
2248 if (low != IWL_RATE_INVALID)
2249 low_tpt = tbl->win[low].average_tpt;
2250 if (high != IWL_RATE_INVALID)
2251 high_tpt = tbl->win[high].average_tpt;
2252
4d30ee82 2253 IWL_DEBUG_RATE(mvm,
cc60c6e9
ES		 2254 "%s: cur_tpt %d SR %d low %d high %d low_tpt %d high_tpt %d\n",
2255 rs_pretty_rate(rate), current_tpt, sr,
5aa33553 2256 low, high, low_tpt, high_tpt);
4d30ee82 2257
4e4b815c
ES		 2258 scale_action = rs_get_rate_action(mvm, tbl, sr, low, high,
2259 current_tpt, low_tpt, high_tpt);
8ca151b5 2260
393b9e5b 2261 /* Force a search in case BT doesn't like us being in MIMO */
5aa33553 2262 if (is_mimo(rate) &&
393b9e5b 2263 !iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) {
4d30ee82
ES		 2264 IWL_DEBUG_RATE(mvm,
2265 "BT Coex forbids MIMO. Search for new config\n");
36946ce6
EG		 2266 rs_stay_in_table(lq_sta, true);
2267 goto lq_update;
2268 }
2269
8ca151b5 2270 switch (scale_action) {
4e4b815c 2271 case RS_ACTION_DOWNSCALE:
8ca151b5
JB		 2272 /* Decrease starting rate, update uCode's rate table */
2273 if (low != IWL_RATE_INVALID) {
2274 update_lq = 1;
2275 index = low;
4d30ee82
ES		 2276 } else {
2277 IWL_DEBUG_RATE(mvm,
2278 "At the bottom rate. Can't decrease\n");
8ca151b5
JB		 2279 }
2280
2281 break;
4e4b815c 2282 case RS_ACTION_UPSCALE:
8ca151b5
JB		 2283 /* Increase starting rate, update uCode's rate table */
2284 if (high != IWL_RATE_INVALID) {
2285 update_lq = 1;
2286 index = high;
4d30ee82
ES		 2287 } else {
2288 IWL_DEBUG_RATE(mvm,
2289 "At the top rate. Can't increase\n");
8ca151b5
JB		 2290 }
2291
2292 break;
4e4b815c 2293 case RS_ACTION_STAY:
8ca151b5 2294 /* No change */
e6c8d602
ES		 2295 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN)
2296 update_lq = rs_tpc_perform(mvm, sta, lq_sta, tbl);
2fd647f8 2297 break;
8ca151b5
JB		 2298 default:
2299 break;
2300 }
2301
8ca151b5
JB		 2302lq_update:
2303 /* Replace uCode's rate table for the destination station. */
5aa33553
ES		 2304 if (update_lq) {
2305 tbl->rate.index = index;
1191f646
ES		 2306 if (IWL_MVM_RS_80_20_FAR_RANGE_TWEAK)
2307 rs_tweak_rate_tbl(mvm, sta, lq_sta, tbl, scale_action);
04e3a5da 2308 rs_set_amsdu_len(mvm, sta, tbl, scale_action);
7b9d74e4 2309 rs_update_rate_tbl(mvm, sta, lq_sta, tbl);
5aa33553 2310 }
8ca151b5
JB		 2311
2312 rs_stay_in_table(lq_sta, false);
2313
2314 /*
2315 * Search for new modulation mode if we're:
2316 * 1) Not changing rates right now
2317 * 2) Not just finishing up a search
2318 * 3) Allowing a new search
2319 */
2320 if (!update_lq && !done_search &&
b3b06a32
ES		 2321 lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED
2322 && window->counter) {
2323 enum rs_column next_column;
2324
8ca151b5
JB		 2325 /* Save current throughput to compare with "search" throughput*/
2326 lq_sta->last_tpt = current_tpt;
2327
4d30ee82 2328 IWL_DEBUG_RATE(mvm,
b3b06a32
ES		 2329 "Start Search: update_lq %d done_search %d rs_state %d win->counter %d\n",
2330 update_lq, done_search, lq_sta->rs_state,
4d30ee82 2331 window->counter);
b3b06a32
ES		 2332
2333 next_column = rs_get_next_column(mvm, lq_sta, sta, tbl);
2334 if (next_column != RS_COLUMN_INVALID) {
2335 int ret = rs_switch_to_column(mvm, lq_sta, sta,
2336 next_column);
2337 if (!ret)
2338 lq_sta->search_better_tbl = 1;
2339 } else {
2340 IWL_DEBUG_RATE(mvm,
2341 "No more columns to explore in search cycle. Go to RS_STATE_SEARCH_CYCLE_ENDED\n");
2342 lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_ENDED;
2343 }
8ca151b5
JB		 2344
2345 /* If new "search" mode was selected, set up in uCode table */
2346 if (lq_sta->search_better_tbl) {
2347 /* Access the "search" table, clear its history. */
514ea05b 2348 tbl = &lq_sta->lq_info[rs_search_tbl(lq_sta->active_tbl)];
b804eeb6 2349 rs_rate_scale_clear_tbl_windows(mvm, tbl);
8ca151b5
JB		 2350
2351 /* Use new "search" start rate */
8fc7c58c 2352 index = tbl->rate.index;
8ca151b5 2353
b3b06a32
ES		 2354 rs_dump_rate(mvm, &tbl->rate,
2355 "Switch to SEARCH TABLE:");
7b9d74e4 2356 rs_update_rate_tbl(mvm, sta, lq_sta, tbl);
8ca151b5
JB		 2357 } else {
2358 done_search = 1;
2359 }
2360 }
2361
482e4844
GG		 2362 if (!ndp)
2363 rs_tl_turn_on_agg(mvm, mvmsta, tid, lq_sta, sta);
2364
b3b06a32 2365 if (done_search && lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_ENDED) {
8ca151b5 2366 tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]);
482e4844 2367 rs_set_stay_in_table(mvm, is_legacy(&tbl1->rate), lq_sta);
8ca151b5 2368 }
8ca151b5
JB		 2369}
2370
361dbec8
ES		 2371struct rs_init_rate_info {
2372 s8 rssi;
2373 u8 rate_idx;
2374};
2375
b503ed60 2376static const struct rs_init_rate_info rs_optimal_rates_24ghz_legacy[] = {
361dbec8
ES		 2377 { -60, IWL_RATE_54M_INDEX },
2378 { -64, IWL_RATE_48M_INDEX },
2379 { -68, IWL_RATE_36M_INDEX },
2380 { -80, IWL_RATE_24M_INDEX },
2381 { -84, IWL_RATE_18M_INDEX },
2382 { -85, IWL_RATE_12M_INDEX },
2383 { -86, IWL_RATE_11M_INDEX },
2384 { -88, IWL_RATE_5M_INDEX },
2385 { -90, IWL_RATE_2M_INDEX },
2386 { S8_MIN, IWL_RATE_1M_INDEX },
2387};
2388
b503ed60 2389static const struct rs_init_rate_info rs_optimal_rates_5ghz_legacy[] = {
361dbec8
ES		 2390 { -60, IWL_RATE_54M_INDEX },
2391 { -64, IWL_RATE_48M_INDEX },
2392 { -72, IWL_RATE_36M_INDEX },
2393 { -80, IWL_RATE_24M_INDEX },
2394 { -84, IWL_RATE_18M_INDEX },
2395 { -85, IWL_RATE_12M_INDEX },
2396 { -87, IWL_RATE_9M_INDEX },
2397 { S8_MIN, IWL_RATE_6M_INDEX },
2398};
2399
b503ed60
ES		 2400static const struct rs_init_rate_info rs_optimal_rates_ht[] = {
2401 { -60, IWL_RATE_MCS_7_INDEX },
2402 { -64, IWL_RATE_MCS_6_INDEX },
2403 { -68, IWL_RATE_MCS_5_INDEX },
2404 { -72, IWL_RATE_MCS_4_INDEX },
2405 { -80, IWL_RATE_MCS_3_INDEX },
2406 { -84, IWL_RATE_MCS_2_INDEX },
2407 { -85, IWL_RATE_MCS_1_INDEX },
2408 { S8_MIN, IWL_RATE_MCS_0_INDEX},
2409};
2410
855f492f
GG		 2411/* MCS index 9 is not valid for 20MHz VHT channel width,
2412 * but is ok for 40, 80 and 160MHz channels.
2413 */
b503ed60
ES		 2414static const struct rs_init_rate_info rs_optimal_rates_vht_20mhz[] = {
2415 { -60, IWL_RATE_MCS_8_INDEX },
2416 { -64, IWL_RATE_MCS_7_INDEX },
2417 { -68, IWL_RATE_MCS_6_INDEX },
2418 { -72, IWL_RATE_MCS_5_INDEX },
2419 { -80, IWL_RATE_MCS_4_INDEX },
2420 { -84, IWL_RATE_MCS_3_INDEX },
2421 { -85, IWL_RATE_MCS_2_INDEX },
2422 { -87, IWL_RATE_MCS_1_INDEX },
2423 { S8_MIN, IWL_RATE_MCS_0_INDEX},
2424};
2425
855f492f 2426static const struct rs_init_rate_info rs_optimal_rates_vht[] = {
b503ed60
ES		 2427 { -60, IWL_RATE_MCS_9_INDEX },
2428 { -64, IWL_RATE_MCS_8_INDEX },
2429 { -68, IWL_RATE_MCS_7_INDEX },
2430 { -72, IWL_RATE_MCS_6_INDEX },
2431 { -80, IWL_RATE_MCS_5_INDEX },
2432 { -84, IWL_RATE_MCS_4_INDEX },
2433 { -85, IWL_RATE_MCS_3_INDEX },
2434 { -87, IWL_RATE_MCS_2_INDEX },
2435 { -88, IWL_RATE_MCS_1_INDEX },
2436 { S8_MIN, IWL_RATE_MCS_0_INDEX },
2437};
2438
99319b8c
GG		 2439#define IWL_RS_LOW_RSSI_THRESHOLD (-76) /* dBm */
2440
b503ed60
ES		 2441/* Init the optimal rate based on STA caps
2442 * This combined with rssi is used to report the last tx rate
2443 * to userspace when we haven't transmitted enough frames.
2444 */
2445static void rs_init_optimal_rate(struct iwl_mvm *mvm,
2446 struct ieee80211_sta *sta,
2447 struct iwl_lq_sta *lq_sta)
2448{
2449 struct rs_rate *rate = &lq_sta->optimal_rate;
2450
2451 if (lq_sta->max_mimo2_rate_idx != IWL_RATE_INVALID)
2452 rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2;
2453 else if (lq_sta->max_siso_rate_idx != IWL_RATE_INVALID)
2454 rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO;
57fbcce3 2455 else if (lq_sta->band == NL80211_BAND_5GHZ)
b503ed60
ES		 2456 rate->type = LQ_LEGACY_A;
2457 else
2458 rate->type = LQ_LEGACY_G;
2459
2460 rate->bw = rs_bw_from_sta_bw(sta);
2461 rate->sgi = rs_sgi_allow(mvm, sta, rate, NULL);
2462
2463 /* ANT/LDPC/STBC aren't relevant for the rate reported to userspace */
2464
2465 if (is_mimo(rate)) {
2466 lq_sta->optimal_rate_mask = lq_sta->active_mimo2_rate;
2467 } else if (is_siso(rate)) {
2468 lq_sta->optimal_rate_mask = lq_sta->active_siso_rate;
2469 } else {
2470 lq_sta->optimal_rate_mask = lq_sta->active_legacy_rate;
2471
57fbcce3 2472 if (lq_sta->band == NL80211_BAND_5GHZ) {
b503ed60
ES		 2473 lq_sta->optimal_rates = rs_optimal_rates_5ghz_legacy;
2474 lq_sta->optimal_nentries =
2475 ARRAY_SIZE(rs_optimal_rates_5ghz_legacy);
2476 } else {
2477 lq_sta->optimal_rates = rs_optimal_rates_24ghz_legacy;
2478 lq_sta->optimal_nentries =
2479 ARRAY_SIZE(rs_optimal_rates_24ghz_legacy);
2480 }
2481 }
2482
2483 if (is_vht(rate)) {
2484 if (rate->bw == RATE_MCS_CHAN_WIDTH_20) {
2485 lq_sta->optimal_rates = rs_optimal_rates_vht_20mhz;
2486 lq_sta->optimal_nentries =
2487 ARRAY_SIZE(rs_optimal_rates_vht_20mhz);
2488 } else {
855f492f 2489 lq_sta->optimal_rates = rs_optimal_rates_vht;
b503ed60 2490 lq_sta->optimal_nentries =
855f492f 2491 ARRAY_SIZE(rs_optimal_rates_vht);
b503ed60
ES		 2492 }
2493 } else if (is_ht(rate)) {
2494 lq_sta->optimal_rates = rs_optimal_rates_ht;
2495 lq_sta->optimal_nentries = ARRAY_SIZE(rs_optimal_rates_ht);
2496 }
2497}
2498
2499/* Compute the optimal rate index based on RSSI */
2500static struct rs_rate *rs_get_optimal_rate(struct iwl_mvm *mvm,
2501 struct iwl_lq_sta *lq_sta)
2502{
2503 struct rs_rate *rate = &lq_sta->optimal_rate;
2504 int i;
2505
2506 rate->index = find_first_bit(&lq_sta->optimal_rate_mask,
2507 BITS_PER_LONG);
2508
2509 for (i = 0; i < lq_sta->optimal_nentries; i++) {
2510 int rate_idx = lq_sta->optimal_rates[i].rate_idx;
2511
2512 if ((lq_sta->pers.last_rssi >= lq_sta->optimal_rates[i].rssi) &&
2513 (BIT(rate_idx) & lq_sta->optimal_rate_mask)) {
2514 rate->index = rate_idx;
2515 break;
2516 }
2517 }
2518
b503ed60
ES		 2519 return rate;
2520}
2521
361dbec8
ES		 2522/* Choose an initial legacy rate and antenna to use based on the RSSI
2523 * of last Rx
2524 */
2525static void rs_get_initial_rate(struct iwl_mvm *mvm,
99319b8c 2526 struct ieee80211_sta *sta,
361dbec8 2527 struct iwl_lq_sta *lq_sta,
57fbcce3 2528 enum nl80211_band band,
d94c5a82 2529 struct rs_rate *rate)
361dbec8 2530{
d94c5a82 2531 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
361dbec8 2532 int i, nentries;
99319b8c 2533 unsigned long active_rate;
361dbec8
ES		 2534 s8 best_rssi = S8_MIN;
2535 u8 best_ant = ANT_NONE;
a0544272 2536 u8 valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm);
361dbec8
ES		 2537 const struct rs_init_rate_info *initial_rates;
2538
2539 for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) {
2540 if (!(lq_sta->pers.chains & BIT(i)))
2541 continue;
2542
2543 if (lq_sta->pers.chain_signal[i] > best_rssi) {
2544 best_rssi = lq_sta->pers.chain_signal[i];
2545 best_ant = BIT(i);
2546 }
2547 }
2548
2549 IWL_DEBUG_RATE(mvm, "Best ANT: %s Best RSSI: %d\n",
2550 rs_pretty_ant(best_ant), best_rssi);
2551
2552 if (best_ant != ANT_A && best_ant != ANT_B)
2553 rate->ant = first_antenna(valid_tx_ant);
2554 else
2555 rate->ant = best_ant;
2556
2557 rate->sgi = false;
2558 rate->ldpc = false;
2559 rate->bw = RATE_MCS_CHAN_WIDTH_20;
2560
2561 rate->index = find_first_bit(&lq_sta->active_legacy_rate,
2562 BITS_PER_LONG);
2563
57fbcce3 2564 if (band == NL80211_BAND_5GHZ) {
361dbec8 2565 rate->type = LQ_LEGACY_A;
b503ed60
ES		 2566 initial_rates = rs_optimal_rates_5ghz_legacy;
2567 nentries = ARRAY_SIZE(rs_optimal_rates_5ghz_legacy);
361dbec8
ES		 2568 } else {
2569 rate->type = LQ_LEGACY_G;
b503ed60
ES		 2570 initial_rates = rs_optimal_rates_24ghz_legacy;
2571 nentries = ARRAY_SIZE(rs_optimal_rates_24ghz_legacy);
361dbec8
ES		 2572 }
2573
99319b8c
GG		 2574 if (!IWL_MVM_RS_RSSI_BASED_INIT_RATE)
2575 goto out;
2576
2577 /* Start from a higher rate if the corresponding debug capability
2578 * is enabled. The rate is chosen according to AP capabilities.
2579 * In case of VHT/HT when the rssi is low fallback to the case of
2580 * legacy rates.
2581 */
2582 if (sta->vht_cap.vht_supported &&
2583 best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) {
6b7a5aea
NG		 2584 /*
2585 * In AP mode, when a new station associates, rs is initialized
2586 * immediately upon association completion, before the phy
2587 * context is updated with the association parameters, so the
2588 * sta bandwidth might be wider than the phy context allows.
2589 * To avoid this issue, always initialize rs with 20mhz
2590 * bandwidth rate, and after authorization, when the phy context
2591 * is already up-to-date, re-init rs with the correct bw.
2592 */
d94c5a82
GG		 2593 u32 bw = mvmsta->sta_state < IEEE80211_STA_AUTHORIZED ?
2594 RATE_MCS_CHAN_WIDTH_20 : rs_bw_from_sta_bw(sta);
6b7a5aea
NG		 2595
2596 switch (bw) {
2597 case RATE_MCS_CHAN_WIDTH_40:
2598 case RATE_MCS_CHAN_WIDTH_80:
2599 case RATE_MCS_CHAN_WIDTH_160:
855f492f
GG		 2600 initial_rates = rs_optimal_rates_vht;
2601 nentries = ARRAY_SIZE(rs_optimal_rates_vht);
2602 break;
6b7a5aea 2603 case RATE_MCS_CHAN_WIDTH_20:
99319b8c
GG		 2604 initial_rates = rs_optimal_rates_vht_20mhz;
2605 nentries = ARRAY_SIZE(rs_optimal_rates_vht_20mhz);
855f492f
GG		 2606 break;
2607 default:
99319b8c
GG		 2608 IWL_ERR(mvm, "Invalid BW %d\n", sta->bandwidth);
2609 goto out;
361dbec8 2610 }
855f492f 2611
99319b8c
GG		 2612 active_rate = lq_sta->active_siso_rate;
2613 rate->type = LQ_VHT_SISO;
6b7a5aea 2614 rate->bw = bw;
99319b8c
GG		 2615 } else if (sta->ht_cap.ht_supported &&
2616 best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) {
2617 initial_rates = rs_optimal_rates_ht;
2618 nentries = ARRAY_SIZE(rs_optimal_rates_ht);
2619 active_rate = lq_sta->active_siso_rate;
2620 rate->type = LQ_HT_SISO;
2621 } else {
2622 active_rate = lq_sta->active_legacy_rate;
361dbec8
ES		 2623 }
2624
99319b8c
GG		 2625 for (i = 0; i < nentries; i++) {
2626 int rate_idx = initial_rates[i].rate_idx;
2627
2628 if ((best_rssi >= initial_rates[i].rssi) &&
2629 (BIT(rate_idx) & active_rate)) {
2630 rate->index = rate_idx;
2631 break;
2632 }
2633 }
2634
2635out:
2636 rs_dump_rate(mvm, rate, "INITIAL");
361dbec8
ES		 2637}
2638
2639/* Save info about RSSI of last Rx */
2640void rs_update_last_rssi(struct iwl_mvm *mvm,
ecaf71de 2641 struct iwl_mvm_sta *mvmsta,
361dbec8
ES		 2642 struct ieee80211_rx_status *rx_status)
2643{
ecaf71de 2644 struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv;
b503ed60
ES		 2645 int i;
2646
361dbec8
ES		 2647 lq_sta->pers.chains = rx_status->chains;
2648 lq_sta->pers.chain_signal[0] = rx_status->chain_signal[0];
2649 lq_sta->pers.chain_signal[1] = rx_status->chain_signal[1];
2650 lq_sta->pers.chain_signal[2] = rx_status->chain_signal[2];
b503ed60
ES		 2651 lq_sta->pers.last_rssi = S8_MIN;
2652
2653 for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) {
2654 if (!(lq_sta->pers.chains & BIT(i)))
2655 continue;
2656
2657 if (lq_sta->pers.chain_signal[i] > lq_sta->pers.last_rssi)
2658 lq_sta->pers.last_rssi = lq_sta->pers.chain_signal[i];
2659 }
361dbec8
ES		 2660}
2661
8ca151b5
JB		 2662/**
2663 * rs_initialize_lq - Initialize a station's hardware rate table
2664 *
2665 * The uCode's station table contains a table of fallback rates
2666 * for automatic fallback during transmission.
2667 *
2668 * NOTE: This sets up a default set of values. These will be replaced later
2669 * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
2670 * rc80211_simple.
2671 *
2672 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
2673 * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
2674 * which requires station table entry to exist).
2675 */
2676static void rs_initialize_lq(struct iwl_mvm *mvm,
2677 struct ieee80211_sta *sta,
2678 struct iwl_lq_sta *lq_sta,
cd4d6b0b 2679 enum nl80211_band band)
8ca151b5
JB		 2680{
2681 struct iwl_scale_tbl_info *tbl;
5aa33553 2682 struct rs_rate *rate;
8ca151b5 2683 u8 active_tbl = 0;
8ca151b5
JB		 2684
2685 if (!sta || !lq_sta)
2686 return;
2687
8ca151b5
JB		 2688 if (!lq_sta->search_better_tbl)
2689 active_tbl = lq_sta->active_tbl;
2690 else
514ea05b 2691 active_tbl = rs_search_tbl(lq_sta->active_tbl);
8ca151b5
JB		 2692
2693 tbl = &(lq_sta->lq_info[active_tbl]);
5aa33553 2694 rate = &tbl->rate;
8ca151b5 2695
d94c5a82 2696 rs_get_initial_rate(mvm, sta, lq_sta, band, rate);
b503ed60 2697 rs_init_optimal_rate(mvm, sta, lq_sta);
8ca151b5 2698
8f6438f7
GG		 2699 WARN_ONCE(rate->ant != ANT_A && rate->ant != ANT_B,
2700 "ant: 0x%x, chains 0x%x, fw tx ant: 0x%x, nvm tx ant: 0x%x\n",
2701 rate->ant, lq_sta->pers.chains, mvm->fw->valid_tx_ant,
2702 mvm->nvm_data ? mvm->nvm_data->valid_tx_ant : ANT_INVALID);
2703
99319b8c 2704 tbl->column = rs_get_column_from_rate(rate);
b3b06a32 2705
8ca151b5 2706 rs_set_expected_tpt_table(lq_sta, tbl);
80e9e5cd 2707 rs_fill_lq_cmd(mvm, sta, lq_sta, rate);
8ca151b5 2708 /* TODO restore station should remember the lq cmd */
cd4d6b0b 2709 iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq);
8ca151b5
JB		 2710}
2711
9f66a397
GG		 2712static void rs_drv_get_rate(void *mvm_r, struct ieee80211_sta *sta,
2713 void *mvm_sta,
2714 struct ieee80211_tx_rate_control *txrc)
8ca151b5 2715{
ecaf71de 2716 struct iwl_op_mode *op_mode = mvm_r;
8ca151b5 2717 struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
ecaf71de 2718 struct sk_buff *skb = txrc->skb;
8ca151b5 2719 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
ecaf71de 2720 struct iwl_lq_sta *lq_sta;
b503ed60
ES		 2721 struct rs_rate *optimal_rate;
2722 u32 last_ucode_rate;
8ca151b5 2723
dcbc17ad
JB		 2724 if (sta && !iwl_mvm_sta_from_mac80211(sta)->vif) {
2725 /* if vif isn't initialized mvm doesn't know about
2726 * this station, so don't do anything with the it
2727 */
2728 sta = NULL;
2729 mvm_sta = NULL;
2730 }
2731
ecaf71de
GG		 2732 if (!mvm_sta)
2733 return;
2734
2735 lq_sta = mvm_sta;
d310e405
ES		 2736 iwl_mvm_hwrate_to_tx_rate(lq_sta->last_rate_n_flags,
2737 info->band, &info->control.rates[0]);
622ebe99 2738 info->control.rates[0].count = 1;
b503ed60
ES		 2739
2740 /* Report the optimal rate based on rssi and STA caps if we haven't
2741 * converged yet (too little traffic) or exploring other modulations
2742 */
2743 if (lq_sta->rs_state != RS_STATE_STAY_IN_COLUMN) {
2744 optimal_rate = rs_get_optimal_rate(mvm, lq_sta);
2745 last_ucode_rate = ucode_rate_from_rs_rate(mvm,
2746 optimal_rate);
2747 iwl_mvm_hwrate_to_tx_rate(last_ucode_rate, info->band,
2748 &txrc->reported_rate);
2749 }
8ca151b5
JB		 2750}
2751
9f66a397
GG		 2752static void *rs_drv_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,
2753 gfp_t gfp)
8ca151b5 2754{
7ccb498c 2755 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
ae969afe
EP		 2756 struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_rate;
2757 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
ecaf71de 2758 struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv;
8ca151b5
JB		 2759
2760 IWL_DEBUG_RATE(mvm, "create station rate scale window\n");
2761
ae969afe
EP		 2762 lq_sta->pers.drv = mvm;
2763#ifdef CONFIG_MAC80211_DEBUGFS
2764 lq_sta->pers.dbg_fixed_rate = 0;
2765 lq_sta->pers.dbg_fixed_txp_reduction = TPC_INVALID;
878985ce 2766 lq_sta->pers.ss_force = RS_SS_FORCE_NONE;
ae969afe 2767#endif
361dbec8
ES		 2768 lq_sta->pers.chains = 0;
2769 memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal));
b503ed60 2770 lq_sta->pers.last_rssi = S8_MIN;
ae969afe 2771
ecaf71de 2772 return lq_sta;
8ca151b5
JB		 2773}
2774
d310e405
ES		 2775static int rs_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap *vht_cap,
2776 int nss)
2777{
2778 u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) &
2779 (0x3 << (2 * (nss - 1)));
2780 rx_mcs >>= (2 * (nss - 1));
2781
2782 if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_7)
2783 return IWL_RATE_MCS_7_INDEX;
2784 else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_8)
2785 return IWL_RATE_MCS_8_INDEX;
2786 else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_9)
2787 return IWL_RATE_MCS_9_INDEX;
2788
2789 WARN_ON_ONCE(rx_mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED);
2790 return -1;
2791}
2792
750a1b45
ES		 2793static void rs_vht_set_enabled_rates(struct ieee80211_sta *sta,
2794 struct ieee80211_sta_vht_cap *vht_cap,
2795 struct iwl_lq_sta *lq_sta)
2796{
2797 int i;
2798 int highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 1);
2799
2800 if (highest_mcs >= IWL_RATE_MCS_0_INDEX) {
2801 for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) {
2802 if (i == IWL_RATE_9M_INDEX)
2803 continue;
2804
271518ad
ES		 2805 /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */
2806 if (i == IWL_RATE_MCS_9_INDEX &&
2807 sta->bandwidth == IEEE80211_STA_RX_BW_20)
2808 continue;
2809
750a1b45
ES		 2810 lq_sta->active_siso_rate |= BIT(i);
2811 }
2812 }
2813
ecc90e79
ES		 2814 if (sta->rx_nss < 2)
2815 return;
2816
750a1b45
ES		 2817 highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 2);
2818 if (highest_mcs >= IWL_RATE_MCS_0_INDEX) {
2819 for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) {
2820 if (i == IWL_RATE_9M_INDEX)
2821 continue;
2822
271518ad
ES		 2823 /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */
2824 if (i == IWL_RATE_MCS_9_INDEX &&
2825 sta->bandwidth == IEEE80211_STA_RX_BW_20)
2826 continue;
2827
750a1b45
ES		 2828 lq_sta->active_mimo2_rate |= BIT(i);
2829 }
2830 }
2831}
2832
2f15a829
JB		 2833static void rs_ht_init(struct iwl_mvm *mvm,
2834 struct ieee80211_sta *sta,
2835 struct iwl_lq_sta *lq_sta,
2836 struct ieee80211_sta_ht_cap *ht_cap)
2837{
2838 /* active_siso_rate mask includes 9 MBits (bit 5),
2839 * and CCK (bits 0-3), supp_rates[] does not;
2840 * shift to convert format, force 9 MBits off.
2841 */
2842 lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1;
2843 lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1;
2844 lq_sta->active_siso_rate &= ~((u16)0x2);
2845 lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE;
2846
2847 lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1;
2848 lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1;
2849 lq_sta->active_mimo2_rate &= ~((u16)0x2);
2850 lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE;
2851
2852 if (mvm->cfg->ht_params->ldpc &&
2853 (ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING))
2854 lq_sta->ldpc = true;
2855
2856 if (mvm->cfg->ht_params->stbc &&
2857 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
2858 (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC))
3d44eebf 2859 lq_sta->stbc_capable = true;
2f15a829
JB		 2860
2861 lq_sta->is_vht = false;
2862}
2863
2864static void rs_vht_init(struct iwl_mvm *mvm,
2865 struct ieee80211_sta *sta,
2866 struct iwl_lq_sta *lq_sta,
2867 struct ieee80211_sta_vht_cap *vht_cap)
2868{
2869 rs_vht_set_enabled_rates(sta, vht_cap, lq_sta);
2870
2871 if (mvm->cfg->ht_params->ldpc &&
2872 (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC))
2873 lq_sta->ldpc = true;
2874
2875 if (mvm->cfg->ht_params->stbc &&
2876 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
2877 (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK))
3d44eebf
ES		 2878 lq_sta->stbc_capable = true;
2879
859d914c 2880 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
3d44eebf
ES		 2881 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
2882 (vht_cap->cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE))
2883 lq_sta->bfer_capable = true;
2f15a829
JB		 2884
2885 lq_sta->is_vht = true;
2886}
2887
5fc0f76c 2888#ifdef CONFIG_IWLWIFI_DEBUGFS
9f66a397 2889void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm)
5fc0f76c
ES		 2890{
2891 spin_lock_bh(&mvm->drv_stats_lock);
2f15a829 2892 memset(&mvm->drv_rx_stats, 0, sizeof(mvm->drv_rx_stats));
5fc0f76c
ES		 2893 spin_unlock_bh(&mvm->drv_stats_lock);
2894}
2895
2f15a829 2896void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm, u32 rate, bool agg)
5fc0f76c 2897{
9d504435 2898 u8 nss = 0;
5fc0f76c
ES		 2899
2900 spin_lock(&mvm->drv_stats_lock);
2901
2902 if (agg)
2f15a829 2903 mvm->drv_rx_stats.agg_frames++;
5fc0f76c 2904
2f15a829 2905 mvm->drv_rx_stats.success_frames++;
5fc0f76c
ES		 2906
2907 switch (rate & RATE_MCS_CHAN_WIDTH_MSK) {
2908 case RATE_MCS_CHAN_WIDTH_20:
2f15a829 2909 mvm->drv_rx_stats.bw_20_frames++;
5fc0f76c
ES		 2910 break;
2911 case RATE_MCS_CHAN_WIDTH_40:
2f15a829 2912 mvm->drv_rx_stats.bw_40_frames++;
5fc0f76c
ES		 2913 break;
2914 case RATE_MCS_CHAN_WIDTH_80:
2f15a829 2915 mvm->drv_rx_stats.bw_80_frames++;
5fc0f76c 2916 break;
855f492f
GG		 2917 case RATE_MCS_CHAN_WIDTH_160:
2918 mvm->drv_rx_stats.bw_160_frames++;
2919 break;
5fc0f76c
ES		 2920 default:
2921 WARN_ONCE(1, "bad BW. rate 0x%x", rate);
2922 }
2923
2924 if (rate & RATE_MCS_HT_MSK) {
2f15a829 2925 mvm->drv_rx_stats.ht_frames++;
5fc0f76c
ES		 2926 nss = ((rate & RATE_HT_MCS_NSS_MSK) >> RATE_HT_MCS_NSS_POS) + 1;
2927 } else if (rate & RATE_MCS_VHT_MSK) {
2f15a829 2928 mvm->drv_rx_stats.vht_frames++;
5fc0f76c
ES		 2929 nss = ((rate & RATE_VHT_MCS_NSS_MSK) >>
2930 RATE_VHT_MCS_NSS_POS) + 1;
2931 } else {
2f15a829 2932 mvm->drv_rx_stats.legacy_frames++;
5fc0f76c
ES		 2933 }
2934
2935 if (nss == 1)
2f15a829 2936 mvm->drv_rx_stats.siso_frames++;
5fc0f76c 2937 else if (nss == 2)
2f15a829 2938 mvm->drv_rx_stats.mimo2_frames++;
5fc0f76c
ES		 2939
2940 if (rate & RATE_MCS_SGI_MSK)
2f15a829 2941 mvm->drv_rx_stats.sgi_frames++;
5fc0f76c 2942 else
2f15a829 2943 mvm->drv_rx_stats.ngi_frames++;
5fc0f76c 2944
2f15a829
JB		 2945 mvm->drv_rx_stats.last_rates[mvm->drv_rx_stats.last_frame_idx] = rate;
2946 mvm->drv_rx_stats.last_frame_idx =
2947 (mvm->drv_rx_stats.last_frame_idx + 1) %
2948 ARRAY_SIZE(mvm->drv_rx_stats.last_rates);
5fc0f76c
ES		 2949
2950 spin_unlock(&mvm->drv_stats_lock);
2951}
2952#endif
2953
8ca151b5
JB		 2954/*
2955 * Called after adding a new station to initialize rate scaling
2956 */
9f66a397 2957static void rs_drv_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
cd4d6b0b 2958 enum nl80211_band band)
8ca151b5
JB		 2959{
2960 int i, j;
2961 struct ieee80211_hw *hw = mvm->hw;
2962 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
d310e405 2963 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
7ccb498c 2964 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
ecaf71de 2965 struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv;
8ca151b5
JB		 2966 struct ieee80211_supported_band *sband;
2967 unsigned long supp; /* must be unsigned long for for_each_set_bit */
2968
f5d88fa3
GG		 2969 lockdep_assert_held(&mvmsta->lq_sta.rs_drv.pers.lock);
2970
ae969afe
EP		 2971 /* clear all non-persistent lq data */
2972 memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers));
b87c2179 2973
8ca151b5
JB		 2974 sband = hw->wiphy->bands[band];
2975
7ccb498c 2976 lq_sta->lq.sta_id = mvmsta->sta_id;
84226ca1
GG		 2977 mvmsta->amsdu_enabled = 0;
2978 mvmsta->max_amsdu_len = sta->max_amsdu_len;
8ca151b5
JB		 2979
2980 for (j = 0; j < LQ_SIZE; j++)
b804eeb6 2981 rs_rate_scale_clear_tbl_windows(mvm, &lq_sta->lq_info[j]);
8ca151b5
JB		 2982
2983 lq_sta->flush_timer = 0;
87d5e415 2984 lq_sta->last_tx = jiffies;
8ca151b5
JB		 2985
2986 IWL_DEBUG_RATE(mvm,
2987 "LQ: *** rate scale station global init for station %d ***\n",
7ccb498c 2988 mvmsta->sta_id);
8ca151b5
JB		 2989 /* TODO: what is a good starting rate for STA? About middle? Maybe not
2990 * the lowest or the highest rate.. Could consider using RSSI from
2991 * previous packets? Need to have IEEE 802.1X auth succeed immediately
2992 * after assoc.. */
2993
834437da 2994 lq_sta->missed_rate_counter = IWL_MVM_RS_MISSED_RATE_MAX;
8ca151b5
JB		 2995 lq_sta->band = sband->band;
2996 /*
2997 * active legacy rates as per supported rates bitmap
2998 */
2999 supp = sta->supp_rates[sband->band];
3000 lq_sta->active_legacy_rate = 0;
3001 for_each_set_bit(i, &supp, BITS_PER_LONG)
3002 lq_sta->active_legacy_rate |= BIT(sband->bitrates[i].hw_value);
3003
d310e405 3004 /* TODO: should probably account for rx_highest for both HT/VHT */
2c59d80c
ES		 3005 if (!vht_cap || !vht_cap->vht_supported)
3006 rs_ht_init(mvm, sta, lq_sta, ht_cap);
3007 else
3008 rs_vht_init(mvm, sta, lq_sta, vht_cap);
8ca151b5 3009
6a028d9a
ES		 3010 lq_sta->max_legacy_rate_idx =
3011 rs_get_max_rate_from_mask(lq_sta->active_legacy_rate);
3012 lq_sta->max_siso_rate_idx =
3013 rs_get_max_rate_from_mask(lq_sta->active_siso_rate);
3014 lq_sta->max_mimo2_rate_idx =
3015 rs_get_max_rate_from_mask(lq_sta->active_mimo2_rate);
198266a3 3016
a3576ff2 3017 IWL_DEBUG_RATE(mvm,
3d44eebf 3018 "LEGACY=%lX SISO=%lX MIMO2=%lX VHT=%d LDPC=%d STBC=%d BFER=%d\n",
198266a3 3019 lq_sta->active_legacy_rate,
8ca151b5 3020 lq_sta->active_siso_rate,
d310e405 3021 lq_sta->active_mimo2_rate,
3d44eebf
ES		 3022 lq_sta->is_vht, lq_sta->ldpc, lq_sta->stbc_capable,
3023 lq_sta->bfer_capable);
198266a3
ES		 3024 IWL_DEBUG_RATE(mvm, "MAX RATE: LEGACY=%d SISO=%d MIMO2=%d\n",
3025 lq_sta->max_legacy_rate_idx,
3026 lq_sta->max_siso_rate_idx,
3027 lq_sta->max_mimo2_rate_idx);
8ca151b5
JB		 3028
3029 /* These values will be overridden later */
3030 lq_sta->lq.single_stream_ant_msk =
d5367de2 3031 iwl_mvm_bt_coex_get_single_ant_msk(mvm, iwl_mvm_get_valid_tx_ant(mvm));
809bccfa 3032 lq_sta->lq.dual_stream_ant_msk = ANT_AB;
8ca151b5
JB		 3033
3034 /* as default allow aggregation for all tids */
3035 lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID;
8ca151b5 3036 lq_sta->is_agg = 0;
5fc0f76c 3037#ifdef CONFIG_IWLWIFI_DEBUGFS
2f15a829 3038 iwl_mvm_reset_frame_stats(mvm);
5fc0f76c 3039#endif
cd4d6b0b 3040 rs_initialize_lq(mvm, sta, lq_sta, band);
b87c2179
ES		 3041}
3042
9f66a397
GG		 3043static void rs_drv_rate_update(void *mvm_r,
3044 struct ieee80211_supported_band *sband,
3045 struct cfg80211_chan_def *chandef,
3046 struct ieee80211_sta *sta,
3047 void *priv_sta, u32 changed)
b87c2179 3048{
9f66a397
GG		 3049 struct iwl_op_mode *op_mode = mvm_r;
3050 struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
b87c2179 3051 u8 tid;
b87c2179 3052
dcbc17ad
JB		 3053 if (!iwl_mvm_sta_from_mac80211(sta)->vif)
3054 return;
3055
b87c2179
ES		 3056 /* Stop any ongoing aggregations as rs starts off assuming no agg */
3057 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
3058 ieee80211_stop_tx_ba_session(sta, tid);
3059
3baf7528 3060 iwl_mvm_rs_rate_init(mvm, sta, sband->band, true);
8ca151b5
JB		 3061}
3062
f5d88fa3
GG		 3063static void __iwl_mvm_rs_tx_status(struct iwl_mvm *mvm,
3064 struct ieee80211_sta *sta,
3065 int tid, struct ieee80211_tx_info *info,
3066 bool ndp)
3067{
3068 int legacy_success;
3069 int retries;
3070 int i;
3071 struct iwl_lq_cmd *table;
3072 u32 lq_hwrate;
3073 struct rs_rate lq_rate, tx_resp_rate;
3074 struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl;
3075 u32 tlc_info = (uintptr_t)info->status.status_driver_data[0];
3076 u8 reduced_txp = tlc_info & RS_DRV_DATA_TXP_MSK;
3077 u8 lq_color = RS_DRV_DATA_LQ_COLOR_GET(tlc_info);
3078 u32 tx_resp_hwrate = (uintptr_t)info->status.status_driver_data[1];
3079 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3080 struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv;
3081
3082 /* Treat uninitialized rate scaling data same as non-existing. */
3083 if (!lq_sta) {
3084 IWL_DEBUG_RATE(mvm, "Station rate scaling not created yet.\n");
3085 return;
3086 } else if (!lq_sta->pers.drv) {
3087 IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n");
3088 return;
3089 }
3090
3091 /* This packet was aggregated but doesn't carry status info */
3092 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
3093 !(info->flags & IEEE80211_TX_STAT_AMPDU))
3094 return;
3095
3096 if (rs_rate_from_ucode_rate(tx_resp_hwrate, info->band,
3097 &tx_resp_rate)) {
3098 WARN_ON_ONCE(1);
3099 return;
3100 }
3101
3102#ifdef CONFIG_MAC80211_DEBUGFS
3103 /* Disable last tx check if we are debugging with fixed rate but
3104 * update tx stats
3105 */
3106 if (lq_sta->pers.dbg_fixed_rate) {
3107 int index = tx_resp_rate.index;
3108 enum rs_column column;
3109 int attempts, success;
3110
3111 column = rs_get_column_from_rate(&tx_resp_rate);
3112 if (WARN_ONCE(column == RS_COLUMN_INVALID,
3113 "Can't map rate 0x%x to column",
3114 tx_resp_hwrate))
3115 return;
3116
3117 if (info->flags & IEEE80211_TX_STAT_AMPDU) {
3118 attempts = info->status.ampdu_len;
3119 success = info->status.ampdu_ack_len;
3120 } else {
3121 attempts = info->status.rates[0].count;
3122 success = !!(info->flags & IEEE80211_TX_STAT_ACK);
3123 }
3124
3125 lq_sta->pers.tx_stats[column][index].total += attempts;
3126 lq_sta->pers.tx_stats[column][index].success += success;
3127
3128 IWL_DEBUG_RATE(mvm, "Fixed rate 0x%x success %d attempts %d\n",
3129 tx_resp_hwrate, success, attempts);
3130 return;
3131 }
3132#endif
3133
3134 if (time_after(jiffies,
3135 (unsigned long)(lq_sta->last_tx +
3136 (IWL_MVM_RS_IDLE_TIMEOUT * HZ)))) {
3137 IWL_DEBUG_RATE(mvm, "Tx idle for too long. reinit rs\n");
3138 /* reach here only in case of driver RS, call directly
3139 * the unlocked version
3140 */
3141 rs_drv_rate_init(mvm, sta, info->band);
3142 return;
3143 }
3144 lq_sta->last_tx = jiffies;
3145
3146 /* Ignore this Tx frame response if its initial rate doesn't match
3147 * that of latest Link Quality command. There may be stragglers
3148 * from a previous Link Quality command, but we're no longer interested
3149 * in those; they're either from the "active" mode while we're trying
3150 * to check "search" mode, or a prior "search" mode after we've moved
3151 * to a new "search" mode (which might become the new "active" mode).
3152 */
3153 table = &lq_sta->lq;
3154 lq_hwrate = le32_to_cpu(table->rs_table[0]);
3155 if (rs_rate_from_ucode_rate(lq_hwrate, info->band, &lq_rate)) {
3156 WARN_ON_ONCE(1);
3157 return;
3158 }
3159
3160 /* Here we actually compare this rate to the latest LQ command */
3161 if (lq_color != LQ_FLAG_COLOR_GET(table->flags)) {
3162 IWL_DEBUG_RATE(mvm,
3163 "tx resp color 0x%x does not match 0x%x\n",
3164 lq_color, LQ_FLAG_COLOR_GET(table->flags));
3165
3166 /* Since rates mis-match, the last LQ command may have failed.
3167 * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with
3168 * ... driver.
3169 */
3170 lq_sta->missed_rate_counter++;
3171 if (lq_sta->missed_rate_counter > IWL_MVM_RS_MISSED_RATE_MAX) {
3172 lq_sta->missed_rate_counter = 0;
3173 IWL_DEBUG_RATE(mvm,
3174 "Too many rates mismatch. Send sync LQ. rs_state %d\n",
3175 lq_sta->rs_state);
3176 iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq);
3177 }
3178 /* Regardless, ignore this status info for outdated rate */
3179 return;
3180 }
3181
3182 /* Rate did match, so reset the missed_rate_counter */
3183 lq_sta->missed_rate_counter = 0;
3184
3185 if (!lq_sta->search_better_tbl) {
3186 curr_tbl = &lq_sta->lq_info[lq_sta->active_tbl];
514ea05b 3187 other_tbl = &lq_sta->lq_info[rs_search_tbl(lq_sta->active_tbl)];
f5d88fa3 3188 } else {
514ea05b 3189 curr_tbl = &lq_sta->lq_info[rs_search_tbl(lq_sta->active_tbl)];
f5d88fa3
GG		 3190 other_tbl = &lq_sta->lq_info[lq_sta->active_tbl];
3191 }
3192
3193 if (WARN_ON_ONCE(!rs_rate_column_match(&lq_rate, &curr_tbl->rate))) {
3194 IWL_DEBUG_RATE(mvm,
3195 "Neither active nor search matches tx rate\n");
3196 tmp_tbl = &lq_sta->lq_info[lq_sta->active_tbl];
3197 rs_dump_rate(mvm, &tmp_tbl->rate, "ACTIVE");
514ea05b 3198 tmp_tbl = &lq_sta->lq_info[rs_search_tbl(lq_sta->active_tbl)];
f5d88fa3
GG		 3199 rs_dump_rate(mvm, &tmp_tbl->rate, "SEARCH");
3200 rs_dump_rate(mvm, &lq_rate, "ACTUAL");
3201
3202 /* no matching table found, let's by-pass the data collection
3203 * and continue to perform rate scale to find the rate table
3204 */
3205 rs_stay_in_table(lq_sta, true);
3206 goto done;
3207 }
3208
3209 /* Updating the frame history depends on whether packets were
3210 * aggregated.
3211 *
3212 * For aggregation, all packets were transmitted at the same rate, the
3213 * first index into rate scale table.
3214 */
3215 if (info->flags & IEEE80211_TX_STAT_AMPDU) {
3216 rs_collect_tpc_data(mvm, lq_sta, curr_tbl, tx_resp_rate.index,
3217 info->status.ampdu_len,
3218 info->status.ampdu_ack_len,
3219 reduced_txp);
3220
3221 /* ampdu_ack_len = 0 marks no BA was received. For TLC, treat
3222 * it as a single frame loss as we don't want the success ratio
3223 * to dip too quickly because a BA wasn't received.
3224 * For TPC, there's no need for this optimisation since we want
3225 * to recover very quickly from a bad power reduction and,
3226 * therefore we'd like the success ratio to get an immediate hit
3227 * when failing to get a BA, so we'd switch back to a lower or
3228 * zero power reduction. When FW transmits agg with a rate
3229 * different from the initial rate, it will not use reduced txp
3230 * and will send BA notification twice (one empty with reduced
3231 * txp equal to the value from LQ and one with reduced txp 0).
3232 * We need to update counters for each txp level accordingly.
3233 */
3234 if (info->status.ampdu_ack_len == 0)
3235 info->status.ampdu_len = 1;
3236
3237 rs_collect_tlc_data(mvm, mvmsta, tid, curr_tbl,
3238 tx_resp_rate.index,
3239 info->status.ampdu_len,
3240 info->status.ampdu_ack_len);
3241
3242 /* Update success/fail counts if not searching for new mode */
3243 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {
3244 lq_sta->total_success += info->status.ampdu_ack_len;
3245 lq_sta->total_failed += (info->status.ampdu_len -
3246 info->status.ampdu_ack_len);
3247 }
3248 } else {
3249 /* For legacy, update frame history with for each Tx retry. */
3250 retries = info->status.rates[0].count - 1;
3251 /* HW doesn't send more than 15 retries */
3252 retries = min(retries, 15);
3253
3254 /* The last transmission may have been successful */
3255 legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK);
3256 /* Collect data for each rate used during failed TX attempts */
3257 for (i = 0; i <= retries; ++i) {
3258 lq_hwrate = le32_to_cpu(table->rs_table[i]);
3259 if (rs_rate_from_ucode_rate(lq_hwrate, info->band,
3260 &lq_rate)) {
3261 WARN_ON_ONCE(1);
3262 return;
3263 }
3264
3265 /* Only collect stats if retried rate is in the same RS
3266 * table as active/search.
3267 */
3268 if (rs_rate_column_match(&lq_rate, &curr_tbl->rate))
3269 tmp_tbl = curr_tbl;
3270 else if (rs_rate_column_match(&lq_rate,
3271 &other_tbl->rate))
3272 tmp_tbl = other_tbl;
3273 else
3274 continue;
3275
3276 rs_collect_tpc_data(mvm, lq_sta, tmp_tbl,
3277 tx_resp_rate.index, 1,
3278 i < retries ? 0 : legacy_success,
3279 reduced_txp);
3280 rs_collect_tlc_data(mvm, mvmsta, tid, tmp_tbl,
3281 tx_resp_rate.index, 1,
3282 i < retries ? 0 : legacy_success);
3283 }
3284
3285 /* Update success/fail counts if not searching for new mode */
3286 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {
3287 lq_sta->total_success += legacy_success;
3288 lq_sta->total_failed += retries + (1 - legacy_success);
3289 }
3290 }
3291 /* The last TX rate is cached in lq_sta; it's set in if/else above */
3292 lq_sta->last_rate_n_flags = lq_hwrate;
3293 IWL_DEBUG_RATE(mvm, "reduced txpower: %d\n", reduced_txp);
3294done:
3295 /* See if there's a better rate or modulation mode to try. */
3296 if (sta->supp_rates[info->band])
3297 rs_rate_scale_perform(mvm, sta, lq_sta, tid, ndp);
3298}
3299
3300void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
3301 int tid, struct ieee80211_tx_info *info, bool ndp)
3302{
3303 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3304
3305 /* If it's locked we are in middle of init flow
3306 * just wait for next tx status to update the lq_sta data
3307 */
3308 if (!spin_trylock(&mvmsta->lq_sta.rs_drv.pers.lock))
3309 return;
3310
3311 __iwl_mvm_rs_tx_status(mvm, sta, tid, info, ndp);
3312 spin_unlock(&mvmsta->lq_sta.rs_drv.pers.lock);
3313}
3314
8fc7c58c
ES		 3315#ifdef CONFIG_MAC80211_DEBUGFS
3316static void rs_build_rates_table_from_fixed(struct iwl_mvm *mvm,
3317 struct iwl_lq_cmd *lq_cmd,
57fbcce3 3318 enum nl80211_band band,
8fc7c58c
ES		 3319 u32 ucode_rate)
3320{
3321 struct rs_rate rate;
3322 int i;
3323 int num_rates = ARRAY_SIZE(lq_cmd->rs_table);
3324 __le32 ucode_rate_le32 = cpu_to_le32(ucode_rate);
7ceb98a3 3325 u8 ant = (ucode_rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS;
8fc7c58c
ES		 3326
3327 for (i = 0; i < num_rates; i++)
3328 lq_cmd->rs_table[i] = ucode_rate_le32;
3329
3d71c3f1
LC		 3330 if (rs_rate_from_ucode_rate(ucode_rate, band, &rate)) {
3331 WARN_ON_ONCE(1);
3332 return;
3333 }
8fc7c58c
ES		 3334
3335 if (is_mimo(&rate))
3336 lq_cmd->mimo_delim = num_rates - 1;
3337 else
3338 lq_cmd->mimo_delim = 0;
7ceb98a3
EG		 3339
3340 lq_cmd->reduced_tpc = 0;
3341
3342 if (num_of_ant(ant) == 1)
3343 lq_cmd->single_stream_ant_msk = ant;
3344
a58bb468
LK		 3345 if (!mvm->trans->cfg->gen2)
3346 lq_cmd->agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
3347 else
3348 lq_cmd->agg_frame_cnt_limit =
3349 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
8fc7c58c
ES		 3350}
3351#endif /* CONFIG_MAC80211_DEBUGFS */
3352
e07be6d3
ES		 3353static void rs_fill_rates_for_column(struct iwl_mvm *mvm,
3354 struct iwl_lq_sta *lq_sta,
3355 struct rs_rate *rate,
3356 __le32 *rs_table, int *rs_table_index,
3357 int num_rates, int num_retries,
3358 u8 valid_tx_ant, bool toggle_ant)
3359{
3360 int i, j;
3361 __le32 ucode_rate;
3362 bool bottom_reached = false;
3363 int prev_rate_idx = rate->index;
3364 int end = LINK_QUAL_MAX_RETRY_NUM;
3365 int index = *rs_table_index;
3366
3367 for (i = 0; i < num_rates && index < end; i++) {
bd999318
ES		 3368 for (j = 0; j < num_retries && index < end; j++, index++) {
3369 ucode_rate = cpu_to_le32(ucode_rate_from_rs_rate(mvm,
3370 rate));
e07be6d3 3371 rs_table[index] = ucode_rate;
bd999318
ES		 3372 if (toggle_ant)
3373 rs_toggle_antenna(valid_tx_ant, rate);
3374 }
e07be6d3
ES		 3375
3376 prev_rate_idx = rate->index;
3377 bottom_reached = rs_get_lower_rate_in_column(lq_sta, rate);
3378 if (bottom_reached && !is_legacy(rate))
3379 break;
3380 }
3381
bd999318 3382 if (!bottom_reached && !is_legacy(rate))
e07be6d3
ES		 3383 rate->index = prev_rate_idx;
3384
3385 *rs_table_index = index;
3386}
3387
3388/* Building the rate table is non trivial. When we're in MIMO2/VHT/80Mhz/SGI
3389 * column the rate table should look like this:
3390 *
e7eed19a
LC		 3391 * rate[0] 0x400F019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI
3392 * rate[1] 0x400F019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI
3393 * rate[2] 0x400F018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI
3394 * rate[3] 0x400F018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI
3395 * rate[4] 0x400F017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI
3396 * rate[5] 0x400F017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI
e07be6d3
ES		 3397 * rate[6] 0x4005007 VHT | ANT: A BW: 80Mhz MCS: 7 NSS: 1 NGI
3398 * rate[7] 0x4009006 VHT | ANT: B BW: 80Mhz MCS: 6 NSS: 1 NGI
3399 * rate[8] 0x4005005 VHT | ANT: A BW: 80Mhz MCS: 5 NSS: 1 NGI
3400 * rate[9] 0x800B Legacy | ANT: B Rate: 36 Mbps
3401 * rate[10] 0x4009 Legacy | ANT: A Rate: 24 Mbps
3402 * rate[11] 0x8007 Legacy | ANT: B Rate: 18 Mbps
3403 * rate[12] 0x4005 Legacy | ANT: A Rate: 12 Mbps
3404 * rate[13] 0x800F Legacy | ANT: B Rate: 9 Mbps
3405 * rate[14] 0x400D Legacy | ANT: A Rate: 6 Mbps
3406 * rate[15] 0x800D Legacy | ANT: B Rate: 6 Mbps
3407 */
8fc7c58c 3408static void rs_build_rates_table(struct iwl_mvm *mvm,
d8bafeaf 3409 struct ieee80211_sta *sta,
8fc7c58c
ES		 3410 struct iwl_lq_sta *lq_sta,
3411 const struct rs_rate *initial_rate)
8ca151b5 3412{
5aa33553 3413 struct rs_rate rate;
e07be6d3 3414 int num_rates, num_retries, index = 0;
8ca151b5
JB		 3415 u8 valid_tx_ant = 0;
3416 struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;
e07be6d3 3417 bool toggle_ant = false;
ea42d1cb 3418 u32 color;
8ca151b5 3419
9e898f1b 3420 memcpy(&rate, initial_rate, sizeof(rate));
8fc7c58c 3421
a0544272 3422 valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm);
c5d679a5 3423
3d44eebf 3424 /* TODO: remove old API when min FW API hits 14 */
859d914c 3425 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS) &&
3d44eebf
ES		 3426 rs_stbc_allow(mvm, sta, lq_sta))
3427 rate.stbc = true;
8ca151b5 3428
e07be6d3 3429 if (is_siso(&rate)) {
834437da
ES		 3430 num_rates = IWL_MVM_RS_INITIAL_SISO_NUM_RATES;
3431 num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE;
e07be6d3 3432 } else if (is_mimo(&rate)) {
834437da
ES		 3433 num_rates = IWL_MVM_RS_INITIAL_MIMO_NUM_RATES;
3434 num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE;
8ca151b5 3435 } else {
834437da 3436 num_rates = IWL_MVM_RS_INITIAL_LEGACY_NUM_RATES;
bd999318 3437 num_retries = IWL_MVM_RS_INITIAL_LEGACY_RETRIES;
e07be6d3 3438 toggle_ant = true;
8ca151b5
JB		 3439 }
3440
e07be6d3
ES		 3441 rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,
3442 num_rates, num_retries, valid_tx_ant,
3443 toggle_ant);
8ca151b5 3444
e07be6d3 3445 rs_get_lower_rate_down_column(lq_sta, &rate);
8ca151b5 3446
e07be6d3 3447 if (is_siso(&rate)) {
834437da
ES		 3448 num_rates = IWL_MVM_RS_SECONDARY_SISO_NUM_RATES;
3449 num_retries = IWL_MVM_RS_SECONDARY_SISO_RETRIES;
d9088f60 3450 lq_cmd->mimo_delim = index;
e07be6d3 3451 } else if (is_legacy(&rate)) {
834437da 3452 num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES;
bd999318 3453 num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES;
e07be6d3
ES		 3454 } else {
3455 WARN_ON_ONCE(1);
3456 }
8ca151b5 3457
e07be6d3 3458 toggle_ant = true;
8ca151b5 3459
e07be6d3
ES		 3460 rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,
3461 num_rates, num_retries, valid_tx_ant,
3462 toggle_ant);
8ca151b5 3463
e07be6d3 3464 rs_get_lower_rate_down_column(lq_sta, &rate);
8ca151b5 3465
834437da 3466 num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES;
bd999318 3467 num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES;
8ca151b5 3468
e07be6d3
ES		 3469 rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,
3470 num_rates, num_retries, valid_tx_ant,
3471 toggle_ant);
8ca151b5 3472
ea42d1cb
GG		 3473 /* update the color of the LQ command (as a counter at bits 1-3) */
3474 color = LQ_FLAGS_COLOR_INC(LQ_FLAG_COLOR_GET(lq_cmd->flags));
3475 lq_cmd->flags = LQ_FLAG_COLOR_SET(lq_cmd->flags, color);
8fc7c58c
ES		 3476}
3477
3d44eebf
ES		 3478struct rs_bfer_active_iter_data {
3479 struct ieee80211_sta *exclude_sta;
3480 struct iwl_mvm_sta *bfer_mvmsta;
3481};
3482
3483static void rs_bfer_active_iter(void *_data,
3484 struct ieee80211_sta *sta)
3485{
3486 struct rs_bfer_active_iter_data *data = _data;
3487 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
ecaf71de 3488 struct iwl_lq_cmd *lq_cmd = &mvmsta->lq_sta.rs_drv.lq;
3d44eebf
ES		 3489 u32 ss_params = le32_to_cpu(lq_cmd->ss_params);
3490
3491 if (sta == data->exclude_sta)
3492 return;
3493
3494 /* The current sta has BFER allowed */
3495 if (ss_params & LQ_SS_BFER_ALLOWED) {
3496 WARN_ON_ONCE(data->bfer_mvmsta != NULL);
3497
3498 data->bfer_mvmsta = mvmsta;
3499 }
3500}
3501
3502static int rs_bfer_priority(struct iwl_mvm_sta *sta)
3503{
3504 int prio = -1;
3505 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(sta->vif);
3506
3507 switch (viftype) {
3508 case NL80211_IFTYPE_AP:
3509 case NL80211_IFTYPE_P2P_GO:
3510 prio = 3;
3511 break;
3512 case NL80211_IFTYPE_P2P_CLIENT:
3513 prio = 2;
3514 break;
3515 case NL80211_IFTYPE_STATION:
3516 prio = 1;
3517 break;
3518 default:
3519 WARN_ONCE(true, "viftype %d sta_id %d", viftype, sta->sta_id);
3520 prio = -1;
3521 }
3522
3523 return prio;
3524}
3525
3526/* Returns >0 if sta1 has a higher BFER priority compared to sta2 */
3527static int rs_bfer_priority_cmp(struct iwl_mvm_sta *sta1,
3528 struct iwl_mvm_sta *sta2)
3529{
3530 int prio1 = rs_bfer_priority(sta1);
3531 int prio2 = rs_bfer_priority(sta2);
3532
3533 if (prio1 > prio2)
3534 return 1;
3535 if (prio1 < prio2)
3536 return -1;
3537 return 0;
3538}
3539
3540static void rs_set_lq_ss_params(struct iwl_mvm *mvm,
3541 struct ieee80211_sta *sta,
3542 struct iwl_lq_sta *lq_sta,
3543 const struct rs_rate *initial_rate)
3544{
3545 struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;
3546 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3547 struct rs_bfer_active_iter_data data = {
3548 .exclude_sta = sta,
3549 .bfer_mvmsta = NULL,
3550 };
3551 struct iwl_mvm_sta *bfer_mvmsta = NULL;
3552 u32 ss_params = LQ_SS_PARAMS_VALID;
3553
3554 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))
3555 goto out;
3556
878985ce 3557#ifdef CONFIG_MAC80211_DEBUGFS
1e9c62fa
ES		 3558 /* Check if forcing the decision is configured.
3559 * Note that SISO is forced by not allowing STBC or BFER
3560 */
878985ce 3561 if (lq_sta->pers.ss_force == RS_SS_FORCE_STBC)
1e9c62fa 3562 ss_params |= (LQ_SS_STBC_1SS_ALLOWED | LQ_SS_FORCE);
878985ce 3563 else if (lq_sta->pers.ss_force == RS_SS_FORCE_BFER)
1e9c62fa
ES		 3564 ss_params |= (LQ_SS_BFER_ALLOWED | LQ_SS_FORCE);
3565
878985ce 3566 if (lq_sta->pers.ss_force != RS_SS_FORCE_NONE) {
1e9c62fa 3567 IWL_DEBUG_RATE(mvm, "Forcing single stream Tx decision %d\n",
878985ce 3568 lq_sta->pers.ss_force);
1e9c62fa
ES		 3569 goto out;
3570 }
878985ce 3571#endif
1e9c62fa 3572
3d44eebf
ES		 3573 if (lq_sta->stbc_capable)
3574 ss_params |= LQ_SS_STBC_1SS_ALLOWED;
3575
3576 if (!lq_sta->bfer_capable)
3577 goto out;
3578
3579 ieee80211_iterate_stations_atomic(mvm->hw,
3580 rs_bfer_active_iter,
3581 &data);
3582 bfer_mvmsta = data.bfer_mvmsta;
3583
3584 /* This code is safe as it doesn't run concurrently for different
3585 * stations. This is guaranteed by the fact that calls to
3586 * ieee80211_tx_status wouldn't run concurrently for a single HW.
3587 */
3588 if (!bfer_mvmsta) {
3589 IWL_DEBUG_RATE(mvm, "No sta with BFER allowed found. Allow\n");
3590
3591 ss_params |= LQ_SS_BFER_ALLOWED;
3592 goto out;
3593 }
3594
3595 IWL_DEBUG_RATE(mvm, "Found existing sta %d with BFER activated\n",
3596 bfer_mvmsta->sta_id);
3597
3598 /* Disallow BFER on another STA if active and we're a higher priority */
3599 if (rs_bfer_priority_cmp(mvmsta, bfer_mvmsta) > 0) {
ecaf71de
GG		 3600 struct iwl_lq_cmd *bfersta_lq_cmd =
3601 &bfer_mvmsta->lq_sta.rs_drv.lq;
3d44eebf
ES		 3602 u32 bfersta_ss_params = le32_to_cpu(bfersta_lq_cmd->ss_params);
3603
3604 bfersta_ss_params &= ~LQ_SS_BFER_ALLOWED;
3605 bfersta_lq_cmd->ss_params = cpu_to_le32(bfersta_ss_params);
cd4d6b0b 3606 iwl_mvm_send_lq_cmd(mvm, bfersta_lq_cmd);
3d44eebf
ES		 3607
3608 ss_params |= LQ_SS_BFER_ALLOWED;
3609 IWL_DEBUG_RATE(mvm,
3610 "Lower priority BFER sta found (%d). Switch BFER\n",
3611 bfer_mvmsta->sta_id);
3612 }
3613out:
3614 lq_cmd->ss_params = cpu_to_le32(ss_params);
3615}
3616
8fc7c58c
ES		 3617static void rs_fill_lq_cmd(struct iwl_mvm *mvm,
3618 struct ieee80211_sta *sta,
3619 struct iwl_lq_sta *lq_sta,
3620 const struct rs_rate *initial_rate)
3621{
3622 struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;
7ceb98a3
EG		 3623 struct iwl_mvm_sta *mvmsta;
3624 struct iwl_mvm_vif *mvmvif;
3625
834437da 3626 lq_cmd->agg_disable_start_th = IWL_MVM_RS_AGG_DISABLE_START;
7ceb98a3 3627 lq_cmd->agg_time_limit =
834437da 3628 cpu_to_le16(IWL_MVM_RS_AGG_TIME_LIMIT);
8fc7c58c
ES		 3629
3630#ifdef CONFIG_MAC80211_DEBUGFS
ae969afe 3631 if (lq_sta->pers.dbg_fixed_rate) {
8fc7c58c
ES		 3632 rs_build_rates_table_from_fixed(mvm, lq_cmd,
3633 lq_sta->band,
ae969afe 3634 lq_sta->pers.dbg_fixed_rate);
7ceb98a3
EG		 3635 return;
3636 }
8fc7c58c 3637#endif
7ceb98a3
EG		 3638 if (WARN_ON_ONCE(!sta || !initial_rate))
3639 return;
8fc7c58c 3640
d8bafeaf 3641 rs_build_rates_table(mvm, sta, lq_sta, initial_rate);
8ca151b5 3642
859d914c 3643 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS))
3d44eebf
ES		 3644 rs_set_lq_ss_params(mvm, sta, lq_sta, initial_rate);
3645
7ceb98a3
EG		 3646 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3647 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
e96d551f 3648
d5367de2
EG		 3649 if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_COEX_SCHEMA_2) &&
3650 num_of_ant(initial_rate->ant) == 1)
7ceb98a3
EG		 3651 lq_cmd->single_stream_ant_msk = initial_rate->ant;
3652
3653 lq_cmd->agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
3654
3655 /*
0d365ae5 3656 * In case of low latency, tell the firmware to leave a frame in the
7ceb98a3
EG		 3657 * Tx Fifo so that it can start a transaction in the same TxOP. This
3658 * basically allows the firmware to send bursts.
3659 */
1412ee39 3660 if (iwl_mvm_vif_low_latency(mvmvif))
7ceb98a3
EG		 3661 lq_cmd->agg_frame_cnt_limit--;
3662
a4db848f
EG		 3663 if (mvmsta->vif->p2p)
3664 lq_cmd->flags |= LQ_FLAG_USE_RTS_MSK;
3665
7ceb98a3 3666 lq_cmd->agg_time_limit =
5b7ff615 3667 cpu_to_le16(iwl_mvm_coex_agg_time_limit(mvm, sta));
8ca151b5
JB		 3668}
3669
3670static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
3671{
3672 return hw->priv;
3673}
9f66a397 3674
8ca151b5
JB		 3675/* rate scale requires free function to be implemented */
3676static void rs_free(void *mvm_rate)
3677{
3678 return;
3679}
3680
9f66a397 3681static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta)
8ca151b5
JB		 3682{
3683 struct iwl_op_mode *op_mode __maybe_unused = mvm_r;
3684 struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
3685
3686 IWL_DEBUG_RATE(mvm, "enter\n");
3687 IWL_DEBUG_RATE(mvm, "leave\n");
3688}
3689
3690#ifdef CONFIG_MAC80211_DEBUGFS
f6f046f0 3691int rs_pretty_print_rate(char *buf, int bufsz, const u32 rate)
5aa33553
ES		 3692{
3693
1a61b347
ES		 3694 char *type, *bw;
3695 u8 mcs = 0, nss = 0;
3696 u8 ant = (rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS;
3697
3698 if (!(rate & RATE_MCS_HT_MSK) &&
514c3069
LC		 3699 !(rate & RATE_MCS_VHT_MSK) &&
3700 !(rate & RATE_MCS_HE_MSK)) {
1a61b347
ES		 3701 int index = iwl_hwrate_to_plcp_idx(rate);
3702
f6f046f0
GG		 3703 return scnprintf(buf, bufsz, "Legacy | ANT: %s Rate: %s Mbps\n",
3704 rs_pretty_ant(ant),
3705 index == IWL_RATE_INVALID ? "BAD" :
3706 iwl_rate_mcs[index].mbps);
1a61b347
ES		 3707 }
3708
3709 if (rate & RATE_MCS_VHT_MSK) {
3710 type = "VHT";
3711 mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK;
3712 nss = ((rate & RATE_VHT_MCS_NSS_MSK)
3713 >> RATE_VHT_MCS_NSS_POS) + 1;
3714 } else if (rate & RATE_MCS_HT_MSK) {
3715 type = "HT";
3716 mcs = rate & RATE_HT_MCS_INDEX_MSK;
3374c3ab
GG		 3717 nss = ((rate & RATE_HT_MCS_NSS_MSK)
3718 >> RATE_HT_MCS_NSS_POS) + 1;
514c3069
LC		 3719 } else if (rate & RATE_MCS_HE_MSK) {
3720 type = "HE";
3721 mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK;
3722 nss = ((rate & RATE_VHT_MCS_NSS_MSK)
3723 >> RATE_VHT_MCS_NSS_POS) + 1;
1a61b347
ES		 3724 } else {
3725 type = "Unknown"; /* shouldn't happen */
3726 }
3727
3728 switch (rate & RATE_MCS_CHAN_WIDTH_MSK) {
3729 case RATE_MCS_CHAN_WIDTH_20:
3730 bw = "20Mhz";
3731 break;
3732 case RATE_MCS_CHAN_WIDTH_40:
3733 bw = "40Mhz";
3734 break;
3735 case RATE_MCS_CHAN_WIDTH_80:
3736 bw = "80Mhz";
3737 break;
3738 case RATE_MCS_CHAN_WIDTH_160:
3739 bw = "160Mhz";
3740 break;
3741 default:
3742 bw = "BAD BW";
3743 }
3744
f6f046f0
GG		 3745 return scnprintf(buf, bufsz,
3746 "%s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s\n",
3747 type, rs_pretty_ant(ant), bw, mcs, nss,
3748 (rate & RATE_MCS_SGI_MSK) ? "SGI " : "NGI ",
3749 (rate & RATE_MCS_STBC_MSK) ? "STBC " : "",
3750 (rate & RATE_MCS_LDPC_MSK) ? "LDPC " : "",
3751 (rate & RATE_MCS_BF_MSK) ? "BF " : "");
1a61b347
ES		 3752}
3753
a0c38b21
ES		 3754/**
3755 * Program the device to use fixed rate for frame transmit
3756 * This is for debugging/testing only
3757 * once the device start use fixed rate, we need to reload the module
3758 * to being back the normal operation.
3759 */
3760static void rs_program_fix_rate(struct iwl_mvm *mvm,
3761 struct iwl_lq_sta *lq_sta)
3762{
3763 lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */
3764 lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
3765 lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
3766
3767 IWL_DEBUG_RATE(mvm, "sta_id %d rate 0x%X\n",
ae969afe 3768 lq_sta->lq.sta_id, lq_sta->pers.dbg_fixed_rate);
a0c38b21 3769
ae969afe 3770 if (lq_sta->pers.dbg_fixed_rate) {
7ceb98a3 3771 rs_fill_lq_cmd(mvm, NULL, lq_sta, NULL);
cd4d6b0b 3772 iwl_mvm_send_lq_cmd(lq_sta->pers.drv, &lq_sta->lq);
a0c38b21
ES		 3773 }
3774}
3775
9d10849e
EG		 3776static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file,
3777 const char __user *user_buf, size_t count, loff_t *ppos)
3778{
3779 struct iwl_lq_sta *lq_sta = file->private_data;
3780 struct iwl_mvm *mvm;
3781 char buf[64];
3782 size_t buf_size;
3783 u32 parsed_rate;
3784
ae969afe 3785 mvm = lq_sta->pers.drv;
9d10849e
EG		 3786 memset(buf, 0, sizeof(buf));
3787 buf_size = min(count, sizeof(buf) - 1);
3788 if (copy_from_user(buf, user_buf, buf_size))
3789 return -EFAULT;
3790
3791 if (sscanf(buf, "%x", &parsed_rate) == 1)
ae969afe 3792 lq_sta->pers.dbg_fixed_rate = parsed_rate;
9d10849e 3793 else
ae969afe 3794 lq_sta->pers.dbg_fixed_rate = 0;
9d10849e
EG		 3795
3796 rs_program_fix_rate(mvm, lq_sta);
3797
3798 return count;
3799}
3800
8ca151b5
JB		 3801static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
3802 char __user *user_buf, size_t count, loff_t *ppos)
3803{
3804 char *buff;
3805 int desc = 0;
3806 int i = 0;
8ca151b5 3807 ssize_t ret;
f6f046f0 3808 static const size_t bufsz = 2048;
8ca151b5
JB		 3809
3810 struct iwl_lq_sta *lq_sta = file->private_data;
04e3a5da 3811 struct iwl_mvm_sta *mvmsta =
ecaf71de 3812 container_of(lq_sta, struct iwl_mvm_sta, lq_sta.rs_drv);
8ca151b5
JB		 3813 struct iwl_mvm *mvm;
3814 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
5aa33553 3815 struct rs_rate *rate = &tbl->rate;
16c426ff 3816 u32 ss_params;
04e3a5da 3817
ae969afe 3818 mvm = lq_sta->pers.drv;
f6f046f0 3819 buff = kmalloc(bufsz, GFP_KERNEL);
8ca151b5
JB		 3820 if (!buff)
3821 return -ENOMEM;
3822
f6f046f0
GG		 3823 desc += scnprintf(buff + desc, bufsz - desc,
3824 "sta_id %d\n", lq_sta->lq.sta_id);
3825 desc += scnprintf(buff + desc, bufsz - desc,
3826 "failed=%d success=%d rate=0%lX\n",
3827 lq_sta->total_failed, lq_sta->total_success,
3828 lq_sta->active_legacy_rate);
3829 desc += scnprintf(buff + desc, bufsz - desc, "fixed rate 0x%X\n",
3830 lq_sta->pers.dbg_fixed_rate);
3831 desc += scnprintf(buff + desc, bufsz - desc, "valid_tx_ant %s%s%s\n",
a0544272
MH		 3832 (iwl_mvm_get_valid_tx_ant(mvm) & ANT_A) ? "ANT_A," : "",
3833 (iwl_mvm_get_valid_tx_ant(mvm) & ANT_B) ? "ANT_B," : "",
3834 (iwl_mvm_get_valid_tx_ant(mvm) & ANT_C) ? "ANT_C" : "");
f6f046f0
GG		 3835 desc += scnprintf(buff + desc, bufsz - desc, "lq type %s\n",
3836 (is_legacy(rate)) ? "legacy" :
3837 is_vht(rate) ? "VHT" : "HT");
5aa33553 3838 if (!is_legacy(rate)) {
f6f046f0 3839 desc += scnprintf(buff + desc, bufsz - desc, " %s",
5aa33553 3840 (is_siso(rate)) ? "SISO" : "MIMO2");
f6f046f0 3841 desc += scnprintf(buff + desc, bufsz - desc, " %s",
e70fe7eb
EG		 3842 (is_ht20(rate)) ? "20MHz" :
3843 (is_ht40(rate)) ? "40MHz" :
855f492f
GG		 3844 (is_ht80(rate)) ? "80MHz" :
3845 (is_ht160(rate)) ? "160MHz" : "BAD BW");
f6f046f0 3846 desc += scnprintf(buff + desc, bufsz - desc, " %s %s %s %s\n",
e70fe7eb
EG		 3847 (rate->sgi) ? "SGI" : "NGI",
3848 (rate->ldpc) ? "LDPC" : "BCC",
04e3a5da 3849 (lq_sta->is_agg) ? "AGG on" : "",
84226ca1 3850 (mvmsta->amsdu_enabled) ? "AMSDU on" : "");
8ca151b5 3851 }
f6f046f0 3852 desc += scnprintf(buff + desc, bufsz - desc, "last tx rate=0x%X\n",
8ca151b5 3853 lq_sta->last_rate_n_flags);
f6f046f0 3854 desc += scnprintf(buff + desc, bufsz - desc,
1a61b347 3855 "general: flags=0x%X mimo-d=%d s-ant=0x%x d-ant=0x%x\n",
8ca151b5
JB		 3856 lq_sta->lq.flags,
3857 lq_sta->lq.mimo_delim,
3858 lq_sta->lq.single_stream_ant_msk,
3859 lq_sta->lq.dual_stream_ant_msk);
3860
f6f046f0 3861 desc += scnprintf(buff + desc, bufsz - desc,
8ca151b5
JB		 3862 "agg: time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n",
3863 le16_to_cpu(lq_sta->lq.agg_time_limit),
3864 lq_sta->lq.agg_disable_start_th,
3865 lq_sta->lq.agg_frame_cnt_limit);
3866
f6f046f0
GG		 3867 desc += scnprintf(buff + desc, bufsz - desc, "reduced tpc=%d\n",
3868 lq_sta->lq.reduced_tpc);
16c426ff 3869 ss_params = le32_to_cpu(lq_sta->lq.ss_params);
f6f046f0
GG		 3870 desc += scnprintf(buff + desc, bufsz - desc,
3871 "single stream params: %s%s%s%s\n",
16c426ff 3872 (ss_params & LQ_SS_PARAMS_VALID) ?
db7c689d 3873 "VALID" : "INVALID",
16c426ff 3874 (ss_params & LQ_SS_BFER_ALLOWED) ?
db7c689d 3875 ", BFER" : "",
16c426ff 3876 (ss_params & LQ_SS_STBC_1SS_ALLOWED) ?
db7c689d 3877 ", STBC" : "",
16c426ff 3878 (ss_params & LQ_SS_FORCE) ?
db7c689d 3879 ", FORCE" : "");
f6f046f0 3880 desc += scnprintf(buff + desc, bufsz - desc,
8ca151b5
JB		 3881 "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n",
3882 lq_sta->lq.initial_rate_index[0],
3883 lq_sta->lq.initial_rate_index[1],
3884 lq_sta->lq.initial_rate_index[2],
3885 lq_sta->lq.initial_rate_index[3]);
3886
3887 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
cf4ef654 3888 u32 r = le32_to_cpu(lq_sta->lq.rs_table[i]);
1a61b347 3889
f6f046f0
GG		 3890 desc += scnprintf(buff + desc, bufsz - desc,
3891 " rate[%d] 0x%X ", i, r);
3892 desc += rs_pretty_print_rate(buff + desc, bufsz - desc, r);
8ca151b5
JB		 3893 }
3894
3895 ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
3896 kfree(buff);
3897 return ret;
3898}
3899
3900static const struct file_operations rs_sta_dbgfs_scale_table_ops = {
3901 .write = rs_sta_dbgfs_scale_table_write,
3902 .read = rs_sta_dbgfs_scale_table_read,
3903 .open = simple_open,
3904 .llseek = default_llseek,
3905};
3906static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file,
3907 char __user *user_buf, size_t count, loff_t *ppos)
3908{
3909 char *buff;
3910 int desc = 0;
3911 int i, j;
3912 ssize_t ret;
d310e405 3913 struct iwl_scale_tbl_info *tbl;
5aa33553 3914 struct rs_rate *rate;
8ca151b5
JB		 3915 struct iwl_lq_sta *lq_sta = file->private_data;
3916
3917 buff = kmalloc(1024, GFP_KERNEL);
3918 if (!buff)
3919 return -ENOMEM;
3920
3921 for (i = 0; i < LQ_SIZE; i++) {
d310e405 3922 tbl = &(lq_sta->lq_info[i]);
5aa33553 3923 rate = &tbl->rate;
8ca151b5 3924 desc += sprintf(buff+desc,
6a524f48 3925 "%s type=%d SGI=%d BW=%s DUP=0\n"
8fc7c58c 3926 "index=%d\n",
8ca151b5 3927 lq_sta->active_tbl == i ? "*" : "x",
5aa33553
ES		 3928 rate->type,
3929 rate->sgi,
855f492f
GG		 3930 is_ht20(rate) ? "20MHz" :
3931 is_ht40(rate) ? "40MHz" :
3932 is_ht80(rate) ? "80MHz" :
3933 is_ht160(rate) ? "160MHz" : "ERR",
8fc7c58c 3934 rate->index);
8ca151b5
JB		 3935 for (j = 0; j < IWL_RATE_COUNT; j++) {
3936 desc += sprintf(buff+desc,
3937 "counter=%d success=%d %%=%d\n",
d310e405
ES		 3938 tbl->win[j].counter,
3939 tbl->win[j].success_counter,
3940 tbl->win[j].success_ratio);
8ca151b5
JB		 3941 }
3942 }
3943 ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
3944 kfree(buff);
3945 return ret;
3946}
3947
3948static const struct file_operations rs_sta_dbgfs_stats_table_ops = {
3949 .read = rs_sta_dbgfs_stats_table_read,
3950 .open = simple_open,
3951 .llseek = default_llseek,
3952};
3953
757cf23b
ES		 3954static ssize_t rs_sta_dbgfs_drv_tx_stats_read(struct file *file,
3955 char __user *user_buf,
3956 size_t count, loff_t *ppos)
3957{
3958 static const char * const column_name[] = {
3959 [RS_COLUMN_LEGACY_ANT_A] = "LEGACY_ANT_A",
3960 [RS_COLUMN_LEGACY_ANT_B] = "LEGACY_ANT_B",
3961 [RS_COLUMN_SISO_ANT_A] = "SISO_ANT_A",
3962 [RS_COLUMN_SISO_ANT_B] = "SISO_ANT_B",
3963 [RS_COLUMN_SISO_ANT_A_SGI] = "SISO_ANT_A_SGI",
3964 [RS_COLUMN_SISO_ANT_B_SGI] = "SISO_ANT_B_SGI",
3965 [RS_COLUMN_MIMO2] = "MIMO2",
3966 [RS_COLUMN_MIMO2_SGI] = "MIMO2_SGI",
3967 };
3968
3969 static const char * const rate_name[] = {
3970 [IWL_RATE_1M_INDEX] = "1M",
3971 [IWL_RATE_2M_INDEX] = "2M",
3972 [IWL_RATE_5M_INDEX] = "5.5M",
3973 [IWL_RATE_11M_INDEX] = "11M",
3974 [IWL_RATE_6M_INDEX] = "6M|MCS0",
3975 [IWL_RATE_9M_INDEX] = "9M",
3976 [IWL_RATE_12M_INDEX] = "12M|MCS1",
3977 [IWL_RATE_18M_INDEX] = "18M|MCS2",
3978 [IWL_RATE_24M_INDEX] = "24M|MCS3",
3979 [IWL_RATE_36M_INDEX] = "36M|MCS4",
3980 [IWL_RATE_48M_INDEX] = "48M|MCS5",
3981 [IWL_RATE_54M_INDEX] = "54M|MCS6",
3982 [IWL_RATE_MCS_7_INDEX] = "MCS7",
3983 [IWL_RATE_MCS_8_INDEX] = "MCS8",
3984 [IWL_RATE_MCS_9_INDEX] = "MCS9",
514c3069
LC		 3985 [IWL_RATE_MCS_10_INDEX] = "MCS10",
3986 [IWL_RATE_MCS_11_INDEX] = "MCS11",
757cf23b
ES		 3987 };
3988
3989 char *buff, *pos, *endpos;
3990 int col, rate;
3991 ssize_t ret;
3992 struct iwl_lq_sta *lq_sta = file->private_data;
3993 struct rs_rate_stats *stats;
3994 static const size_t bufsz = 1024;
3995
3996 buff = kmalloc(bufsz, GFP_KERNEL);
3997 if (!buff)
3998 return -ENOMEM;
3999
4000 pos = buff;
4001 endpos = pos + bufsz;
4002
4003 pos += scnprintf(pos, endpos - pos, "COLUMN,");
4004 for (rate = 0; rate < IWL_RATE_COUNT; rate++)
4005 pos += scnprintf(pos, endpos - pos, "%s,", rate_name[rate]);
4006 pos += scnprintf(pos, endpos - pos, "\n");
4007
4008 for (col = 0; col < RS_COLUMN_COUNT; col++) {
4009 pos += scnprintf(pos, endpos - pos,
4010 "%s,", column_name[col]);
4011
4012 for (rate = 0; rate < IWL_RATE_COUNT; rate++) {
f58220f6 4013 stats = &(lq_sta->pers.tx_stats[col][rate]);
757cf23b
ES		 4014 pos += scnprintf(pos, endpos - pos,
4015 "%llu/%llu,",
4016 stats->success,
4017 stats->total);
4018 }
4019 pos += scnprintf(pos, endpos - pos, "\n");
4020 }
4021
4022 ret = simple_read_from_buffer(user_buf, count, ppos, buff, pos - buff);
4023 kfree(buff);
4024 return ret;
4025}
4026
4027static ssize_t rs_sta_dbgfs_drv_tx_stats_write(struct file *file,
4028 const char __user *user_buf,
4029 size_t count, loff_t *ppos)
4030{
4031 struct iwl_lq_sta *lq_sta = file->private_data;
f58220f6 4032 memset(lq_sta->pers.tx_stats, 0, sizeof(lq_sta->pers.tx_stats));
757cf23b
ES		 4033
4034 return count;
4035}
4036
4037static const struct file_operations rs_sta_dbgfs_drv_tx_stats_ops = {
4038 .read = rs_sta_dbgfs_drv_tx_stats_read,
4039 .write = rs_sta_dbgfs_drv_tx_stats_write,
4040 .open = simple_open,
4041 .llseek = default_llseek,
4042};
4043
1e9c62fa
ES		 4044static ssize_t iwl_dbgfs_ss_force_read(struct file *file,
4045 char __user *user_buf,
4046 size_t count, loff_t *ppos)
4047{
4048 struct iwl_lq_sta *lq_sta = file->private_data;
4049 char buf[12];
4050 int bufsz = sizeof(buf);
4051 int pos = 0;
4052 static const char * const ss_force_name[] = {
4053 [RS_SS_FORCE_NONE] = "none",
4054 [RS_SS_FORCE_STBC] = "stbc",
4055 [RS_SS_FORCE_BFER] = "bfer",
4056 [RS_SS_FORCE_SISO] = "siso",
4057 };
4058
4059 pos += scnprintf(buf+pos, bufsz-pos, "%s\n",
878985ce 4060 ss_force_name[lq_sta->pers.ss_force]);
1e9c62fa
ES		 4061 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
4062}
4063
4064static ssize_t iwl_dbgfs_ss_force_write(struct iwl_lq_sta *lq_sta, char *buf,
4065 size_t count, loff_t *ppos)
4066{
4067 struct iwl_mvm *mvm = lq_sta->pers.drv;
4068 int ret = 0;
4069
4070 if (!strncmp("none", buf, 4)) {
878985ce 4071 lq_sta->pers.ss_force = RS_SS_FORCE_NONE;
1e9c62fa 4072 } else if (!strncmp("siso", buf, 4)) {
878985ce 4073 lq_sta->pers.ss_force = RS_SS_FORCE_SISO;
1e9c62fa
ES		 4074 } else if (!strncmp("stbc", buf, 4)) {
4075 if (lq_sta->stbc_capable) {
878985ce 4076 lq_sta->pers.ss_force = RS_SS_FORCE_STBC;
1e9c62fa
ES		 4077 } else {
4078 IWL_ERR(mvm,
4079 "can't force STBC. peer doesn't support\n");
4080 ret = -EINVAL;
4081 }
4082 } else if (!strncmp("bfer", buf, 4)) {
4083 if (lq_sta->bfer_capable) {
878985ce 4084 lq_sta->pers.ss_force = RS_SS_FORCE_BFER;
1e9c62fa
ES		 4085 } else {
4086 IWL_ERR(mvm,
4087 "can't force BFER. peer doesn't support\n");
4088 ret = -EINVAL;
4089 }
4090 } else {
4091 IWL_ERR(mvm, "valid values none|siso|stbc|bfer\n");
4092 ret = -EINVAL;
4093 }
4094 return ret ?: count;
4095}
4096
4097#define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
4098 _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct iwl_lq_sta)
4099#define MVM_DEBUGFS_ADD_FILE_RS(name, parent, mode) do { \
c9af7528
GKH		 4100 debugfs_create_file(#name, mode, parent, lq_sta, \
4101 &iwl_dbgfs_##name##_ops); \
1e9c62fa
ES		 4102 } while (0)
4103
4104MVM_DEBUGFS_READ_WRITE_FILE_OPS(ss_force, 32);
4105
9f66a397
GG		 4106static void rs_drv_add_sta_debugfs(void *mvm, void *priv_sta,
4107 struct dentry *dir)
8ca151b5 4108{
dcbc17ad
JB		 4109 struct iwl_lq_sta *lq_sta = priv_sta;
4110 struct iwl_mvm_sta *mvmsta;
4111
ecaf71de 4112 mvmsta = container_of(lq_sta, struct iwl_mvm_sta, lq_sta.rs_drv);
dcbc17ad
JB		 4113
4114 if (!mvmsta->vif)
4115 return;
1e9c62fa 4116
2ef00c53 4117 debugfs_create_file("rate_scale_table", 0600, dir,
c6e1faad 4118 lq_sta, &rs_sta_dbgfs_scale_table_ops);
2ef00c53 4119 debugfs_create_file("rate_stats_table", 0400, dir,
c6e1faad 4120 lq_sta, &rs_sta_dbgfs_stats_table_ops);
2ef00c53 4121 debugfs_create_file("drv_tx_stats", 0600, dir,
c6e1faad 4122 lq_sta, &rs_sta_dbgfs_drv_tx_stats_ops);
2ef00c53 4123 debugfs_create_u8("tx_agg_tid_enable", 0600, dir,
c6e1faad 4124 &lq_sta->tx_agg_tid_en);
2ef00c53 4125 debugfs_create_u8("reduced_tpc", 0600, dir,
c6e1faad 4126 &lq_sta->pers.dbg_fixed_txp_reduction);
1e9c62fa 4127
2ef00c53 4128 MVM_DEBUGFS_ADD_FILE_RS(ss_force, dir, 0600);
8ca151b5
JB		 4129}
4130
9f66a397 4131void rs_remove_sta_debugfs(void *mvm, void *mvm_sta)
8ca151b5 4132{
8ca151b5
JB		 4133}
4134#endif
4135
4136/*
4137 * Initialization of rate scaling information is done by driver after
4138 * the station is added. Since mac80211 calls this function before a
4139 * station is added we ignore it.
4140 */
9f66a397
GG		 4141static void rs_rate_init_ops(void *mvm_r,
4142 struct ieee80211_supported_band *sband,
4143 struct cfg80211_chan_def *chandef,
4144 struct ieee80211_sta *sta, void *mvm_sta)
8ca151b5
JB		 4145{
4146}
631ad703 4147
9f66a397
GG		 4148/* ops for rate scaling implemented in the driver */
4149static const struct rate_control_ops rs_mvm_ops_drv = {
8ca151b5 4150 .name = RS_NAME,
9f66a397
GG		 4151 .tx_status = rs_drv_mac80211_tx_status,
4152 .get_rate = rs_drv_get_rate,
4153 .rate_init = rs_rate_init_ops,
8ca151b5
JB		 4154 .alloc = rs_alloc,
4155 .free = rs_free,
9f66a397 4156 .alloc_sta = rs_drv_alloc_sta,
8ca151b5 4157 .free_sta = rs_free_sta,
9f66a397 4158 .rate_update = rs_drv_rate_update,
8ca151b5 4159#ifdef CONFIG_MAC80211_DEBUGFS
9f66a397
GG		 4160 .add_sta_debugfs = rs_drv_add_sta_debugfs,
4161 .remove_sta_debugfs = rs_remove_sta_debugfs,
8ca151b5 4162#endif
a53b2a0b 4163 .capa = RATE_CTRL_CAPA_VHT_EXT_NSS_BW,
8ca151b5
JB		 4164};
4165
9f66a397 4166void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
3baf7528 4167 enum nl80211_band band, bool update)
9f66a397 4168{
0f8084cd 4169 if (iwl_mvm_has_tlc_offload(mvm)) {
2859de76 4170 rs_fw_rate_init(mvm, sta, band, update);
0f8084cd
MG		 4171 } else {
4172 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
4173
f5d88fa3 4174 spin_lock(&mvmsta->lq_sta.rs_drv.pers.lock);
cd4d6b0b 4175 rs_drv_rate_init(mvm, sta, band);
f5d88fa3 4176 spin_unlock(&mvmsta->lq_sta.rs_drv.pers.lock);
0f8084cd 4177 }
9f66a397
GG		 4178}
4179
8ca151b5
JB		 4180int iwl_mvm_rate_control_register(void)
4181{
9f66a397 4182 return ieee80211_rate_control_register(&rs_mvm_ops_drv);
8ca151b5
JB		 4183}
4184
4185void iwl_mvm_rate_control_unregister(void)
4186{
9f66a397 4187 ieee80211_rate_control_unregister(&rs_mvm_ops_drv);
8ca151b5 4188}
9ee718aa 4189
110b32f0
GG		 4190static int rs_drv_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
4191 bool enable)
9ee718aa 4192{
ecaf71de 4193 struct iwl_lq_cmd *lq = &mvmsta->lq_sta.rs_drv.lq;
e126b5d9 4194
9ee718aa
EL		 4195 lockdep_assert_held(&mvm->mutex);
4196
4197 if (enable) {
4198 if (mvmsta->tx_protection == 0)
d307ec8d 4199 lq->flags |= LQ_FLAG_USE_RTS_MSK;
9ee718aa
EL		 4200 mvmsta->tx_protection++;
4201 } else {
4202 mvmsta->tx_protection--;
4203 if (mvmsta->tx_protection == 0)
d307ec8d 4204 lq->flags &= ~LQ_FLAG_USE_RTS_MSK;
9ee718aa
EL		 4205 }
4206
cd4d6b0b 4207 return iwl_mvm_send_lq_cmd(mvm, lq);
9ee718aa 4208}
110b32f0
GG		 4209
4210/**
4211 * iwl_mvm_tx_protection - ask FW to enable RTS/CTS protection
4212 * @mvmsta: The station
4213 * @enable: Enable Tx protection?
4214 */
4215int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
4216 bool enable)
4217{
4243edb4 4218 if (iwl_mvm_has_tlc_offload(mvm))
110b32f0
GG		 4219 return rs_fw_tx_protection(mvm, mvmsta, enable);
4220 else
4221 return rs_drv_tx_protection(mvm, mvmsta, enable);
4222}
Linux 6.x block layer and io_uring tree(s)