projects / linux-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Bluetooth: btrsi: rework dependencies
[linux-block.git] / drivers / net / wireless / intel / iwlwifi / mvm / rs.c
CommitLineData
8ca151b5
JB		 1/******************************************************************************
2 *
51368bf7 3 * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
fcc5e851 4 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
ea42d1cb 5 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
8ca151b5
JB		 6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
19 *
20 * The full GNU General Public License is included in this distribution in the
21 * file called LICENSE.
22 *
23 * Contact Information:
cb2f8277 24 * Intel Linux Wireless <linuxwifi@intel.com>
8ca151b5
JB		 25 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26 *
27 *****************************************************************************/
28#include <linux/kernel.h>
8ca151b5
JB		 29#include <linux/skbuff.h>
30#include <linux/slab.h>
31#include <net/mac80211.h>
32
33#include <linux/netdevice.h>
34#include <linux/etherdevice.h>
35#include <linux/delay.h>
36
37#include <linux/workqueue.h>
38#include "rs.h"
39#include "fw-api.h"
40#include "sta.h"
41#include "iwl-op-mode.h"
42#include "mvm.h"
1e9c62fa 43#include "debugfs.h"
8ca151b5 44
8ca151b5 45#define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */
8ca151b5 46
834437da
ES		 47/* Calculations of success ratio are done in fixed point where 12800 is 100%.
48 * Use this macro when dealing with thresholds consts set as a percentage
49 */
50#define RS_PERCENT(x) (128 * x)
8ca151b5
JB		 51
52static u8 rs_ht_to_legacy[] = {
da87d7d5
ES		 53 [IWL_RATE_MCS_0_INDEX] = IWL_RATE_6M_INDEX,
54 [IWL_RATE_MCS_1_INDEX] = IWL_RATE_9M_INDEX,
55 [IWL_RATE_MCS_2_INDEX] = IWL_RATE_12M_INDEX,
56 [IWL_RATE_MCS_3_INDEX] = IWL_RATE_18M_INDEX,
57 [IWL_RATE_MCS_4_INDEX] = IWL_RATE_24M_INDEX,
58 [IWL_RATE_MCS_5_INDEX] = IWL_RATE_36M_INDEX,
59 [IWL_RATE_MCS_6_INDEX] = IWL_RATE_48M_INDEX,
60 [IWL_RATE_MCS_7_INDEX] = IWL_RATE_54M_INDEX,
61 [IWL_RATE_MCS_8_INDEX] = IWL_RATE_54M_INDEX,
62 [IWL_RATE_MCS_9_INDEX] = IWL_RATE_54M_INDEX,
8ca151b5
JB		 63};
64
65static const u8 ant_toggle_lookup[] = {
ef4394b9
EP		 66 [ANT_NONE] = ANT_NONE,
67 [ANT_A] = ANT_B,
82d2b9a6
EG		 68 [ANT_B] = ANT_A,
69 [ANT_AB] = ANT_AB,
8ca151b5
JB		 70};
71
d310e405
ES		 72#define IWL_DECLARE_RATE_INFO(r, s, rp, rn) \
73 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
74 IWL_RATE_HT_SISO_MCS_##s##_PLCP, \
75 IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \
76 IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \
77 IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP,\
78 IWL_RATE_##rp##M_INDEX, \
ab055ce9 79 IWL_RATE_##rn##M_INDEX }
8ca151b5 80
d310e405
ES		 81#define IWL_DECLARE_MCS_RATE(s) \
82 [IWL_RATE_MCS_##s##_INDEX] = { IWL_RATE_INVM_PLCP, \
83 IWL_RATE_HT_SISO_MCS_##s##_PLCP, \
84 IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \
85 IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \
86 IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP, \
87 IWL_RATE_INVM_INDEX, \
88 IWL_RATE_INVM_INDEX }
89
8ca151b5
JB		 90/*
91 * Parameter order:
ab055ce9 92 * rate, ht rate, prev rate, next rate
8ca151b5
JB		 93 *
94 * If there isn't a valid next or previous rate then INV is used which
95 * maps to IWL_RATE_INVALID
96 *
97 */
98static const struct iwl_rs_rate_info iwl_rates[IWL_RATE_COUNT] = {
ab055ce9
ES		 99 IWL_DECLARE_RATE_INFO(1, INV, INV, 2), /* 1mbps */
100 IWL_DECLARE_RATE_INFO(2, INV, 1, 5), /* 2mbps */
101 IWL_DECLARE_RATE_INFO(5, INV, 2, 11), /*5.5mbps */
102 IWL_DECLARE_RATE_INFO(11, INV, 9, 12), /* 11mbps */
d310e405
ES		 103 IWL_DECLARE_RATE_INFO(6, 0, 5, 11), /* 6mbps ; MCS 0 */
104 IWL_DECLARE_RATE_INFO(9, INV, 6, 11), /* 9mbps */
105 IWL_DECLARE_RATE_INFO(12, 1, 11, 18), /* 12mbps ; MCS 1 */
106 IWL_DECLARE_RATE_INFO(18, 2, 12, 24), /* 18mbps ; MCS 2 */
107 IWL_DECLARE_RATE_INFO(24, 3, 18, 36), /* 24mbps ; MCS 3 */
108 IWL_DECLARE_RATE_INFO(36, 4, 24, 48), /* 36mbps ; MCS 4 */
109 IWL_DECLARE_RATE_INFO(48, 5, 36, 54), /* 48mbps ; MCS 5 */
110 IWL_DECLARE_RATE_INFO(54, 6, 48, INV), /* 54mbps ; MCS 6 */
111 IWL_DECLARE_MCS_RATE(7), /* MCS 7 */
112 IWL_DECLARE_MCS_RATE(8), /* MCS 8 */
113 IWL_DECLARE_MCS_RATE(9), /* MCS 9 */
8ca151b5
JB		 114};
115
4e4b815c
ES		 116enum rs_action {
117 RS_ACTION_STAY = 0,
118 RS_ACTION_DOWNSCALE = -1,
119 RS_ACTION_UPSCALE = 1,
120};
121
b3b06a32
ES		 122enum rs_column_mode {
123 RS_INVALID = 0,
124 RS_LEGACY,
125 RS_SISO,
126 RS_MIMO2,
127};
128
fd7dbee5 129#define MAX_NEXT_COLUMNS 7
b3b06a32
ES		 130#define MAX_COLUMN_CHECKS 3
131
0b8d17f3
ES		 132struct rs_tx_column;
133
b3b06a32
ES		 134typedef bool (*allow_column_func_t) (struct iwl_mvm *mvm,
135 struct ieee80211_sta *sta,
bb8f44c9 136 struct rs_rate *rate,
0b8d17f3 137 const struct rs_tx_column *next_col);
b3b06a32
ES		 138
139struct rs_tx_column {
140 enum rs_column_mode mode;
141 u8 ant;
142 bool sgi;
143 enum rs_column next_columns[MAX_NEXT_COLUMNS];
144 allow_column_func_t checks[MAX_COLUMN_CHECKS];
145};
146
219fb66b 147static bool rs_ant_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
bb8f44c9 148 struct rs_rate *rate,
0b8d17f3 149 const struct rs_tx_column *next_col)
219fb66b 150{
0b8d17f3 151 return iwl_mvm_bt_coex_is_ant_avail(mvm, next_col->ant);
219fb66b
EG		 152}
153
b3b06a32 154static bool rs_mimo_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
bb8f44c9 155 struct rs_rate *rate,
0b8d17f3 156 const struct rs_tx_column *next_col)
b3b06a32
ES		 157{
158 if (!sta->ht_cap.ht_supported)
159 return false;
160
161 if (sta->smps_mode == IEEE80211_SMPS_STATIC)
162 return false;
163
a0544272 164 if (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) < 2)
b3b06a32
ES		 165 return false;
166
167 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))
168 return false;
169
5f0d98f2
EG		 170 if (mvm->nvm_data->sku_cap_mimo_disabled)
171 return false;
172
b3b06a32
ES		 173 return true;
174}
175
176static bool rs_siso_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
bb8f44c9 177 struct rs_rate *rate,
0b8d17f3 178 const struct rs_tx_column *next_col)
b3b06a32
ES		 179{
180 if (!sta->ht_cap.ht_supported)
181 return false;
182
183 return true;
184}
185
186static bool rs_sgi_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
bb8f44c9 187 struct rs_rate *rate,
0b8d17f3 188 const struct rs_tx_column *next_col)
b3b06a32 189{
b3b06a32
ES		 190 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
191 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
192
193 if (is_ht20(rate) && (ht_cap->cap &
194 IEEE80211_HT_CAP_SGI_20))
195 return true;
196 if (is_ht40(rate) && (ht_cap->cap &
197 IEEE80211_HT_CAP_SGI_40))
198 return true;
199 if (is_ht80(rate) && (vht_cap->cap &
200 IEEE80211_VHT_CAP_SHORT_GI_80))
201 return true;
855f492f
GG		 202 if (is_ht160(rate) && (vht_cap->cap &
203 IEEE80211_VHT_CAP_SHORT_GI_160))
204 return true;
b3b06a32
ES		 205
206 return false;
207}
208
209static const struct rs_tx_column rs_tx_columns[] = {
210 [RS_COLUMN_LEGACY_ANT_A] = {
211 .mode = RS_LEGACY,
212 .ant = ANT_A,
213 .next_columns = {
214 RS_COLUMN_LEGACY_ANT_B,
215 RS_COLUMN_SISO_ANT_A,
31b20452 216 RS_COLUMN_MIMO2,
d8fff919
ES		 217 RS_COLUMN_INVALID,
218 RS_COLUMN_INVALID,
fd7dbee5
ES		 219 RS_COLUMN_INVALID,
220 RS_COLUMN_INVALID,
b3b06a32 221 },
219fb66b
EG		 222 .checks = {
223 rs_ant_allow,
224 },
b3b06a32
ES		 225 },
226 [RS_COLUMN_LEGACY_ANT_B] = {
227 .mode = RS_LEGACY,
228 .ant = ANT_B,
229 .next_columns = {
230 RS_COLUMN_LEGACY_ANT_A,
231 RS_COLUMN_SISO_ANT_B,
31b20452 232 RS_COLUMN_MIMO2,
d8fff919
ES		 233 RS_COLUMN_INVALID,
234 RS_COLUMN_INVALID,
fd7dbee5
ES		 235 RS_COLUMN_INVALID,
236 RS_COLUMN_INVALID,
b3b06a32 237 },
219fb66b
EG		 238 .checks = {
239 rs_ant_allow,
240 },
b3b06a32
ES		 241 },
242 [RS_COLUMN_SISO_ANT_A] = {
243 .mode = RS_SISO,
244 .ant = ANT_A,
245 .next_columns = {
246 RS_COLUMN_SISO_ANT_B,
247 RS_COLUMN_MIMO2,
248 RS_COLUMN_SISO_ANT_A_SGI,
fd7dbee5
ES		 249 RS_COLUMN_LEGACY_ANT_A,
250 RS_COLUMN_LEGACY_ANT_B,
d8fff919 251 RS_COLUMN_INVALID,
31b20452 252 RS_COLUMN_INVALID,
b3b06a32
ES		 253 },
254 .checks = {
255 rs_siso_allow,
219fb66b 256 rs_ant_allow,
b3b06a32
ES		 257 },
258 },
259 [RS_COLUMN_SISO_ANT_B] = {
260 .mode = RS_SISO,
261 .ant = ANT_B,
262 .next_columns = {
263 RS_COLUMN_SISO_ANT_A,
264 RS_COLUMN_MIMO2,
265 RS_COLUMN_SISO_ANT_B_SGI,
fd7dbee5
ES		 266 RS_COLUMN_LEGACY_ANT_A,
267 RS_COLUMN_LEGACY_ANT_B,
d8fff919 268 RS_COLUMN_INVALID,
31b20452 269 RS_COLUMN_INVALID,
b3b06a32
ES		 270 },
271 .checks = {
272 rs_siso_allow,
219fb66b 273 rs_ant_allow,
b3b06a32
ES		 274 },
275 },
276 [RS_COLUMN_SISO_ANT_A_SGI] = {
277 .mode = RS_SISO,
278 .ant = ANT_A,
279 .sgi = true,
280 .next_columns = {
281 RS_COLUMN_SISO_ANT_B_SGI,
282 RS_COLUMN_MIMO2_SGI,
283 RS_COLUMN_SISO_ANT_A,
fd7dbee5
ES		 284 RS_COLUMN_LEGACY_ANT_A,
285 RS_COLUMN_LEGACY_ANT_B,
31b20452
ES		 286 RS_COLUMN_INVALID,
287 RS_COLUMN_INVALID,
b3b06a32
ES		 288 },
289 .checks = {
290 rs_siso_allow,
219fb66b 291 rs_ant_allow,
b3b06a32
ES		 292 rs_sgi_allow,
293 },
294 },
295 [RS_COLUMN_SISO_ANT_B_SGI] = {
296 .mode = RS_SISO,
297 .ant = ANT_B,
298 .sgi = true,
299 .next_columns = {
300 RS_COLUMN_SISO_ANT_A_SGI,
301 RS_COLUMN_MIMO2_SGI,
302 RS_COLUMN_SISO_ANT_B,
fd7dbee5
ES		 303 RS_COLUMN_LEGACY_ANT_A,
304 RS_COLUMN_LEGACY_ANT_B,
31b20452
ES		 305 RS_COLUMN_INVALID,
306 RS_COLUMN_INVALID,
b3b06a32
ES		 307 },
308 .checks = {
309 rs_siso_allow,
219fb66b 310 rs_ant_allow,
b3b06a32
ES		 311 rs_sgi_allow,
312 },
313 },
314 [RS_COLUMN_MIMO2] = {
315 .mode = RS_MIMO2,
316 .ant = ANT_AB,
317 .next_columns = {
318 RS_COLUMN_SISO_ANT_A,
319 RS_COLUMN_MIMO2_SGI,
fd7dbee5
ES		 320 RS_COLUMN_LEGACY_ANT_A,
321 RS_COLUMN_LEGACY_ANT_B,
31b20452
ES		 322 RS_COLUMN_INVALID,
323 RS_COLUMN_INVALID,
324 RS_COLUMN_INVALID,
b3b06a32
ES		 325 },
326 .checks = {
327 rs_mimo_allow,
328 },
329 },
330 [RS_COLUMN_MIMO2_SGI] = {
331 .mode = RS_MIMO2,
332 .ant = ANT_AB,
333 .sgi = true,
334 .next_columns = {
335 RS_COLUMN_SISO_ANT_A_SGI,
336 RS_COLUMN_MIMO2,
fd7dbee5
ES		 337 RS_COLUMN_LEGACY_ANT_A,
338 RS_COLUMN_LEGACY_ANT_B,
31b20452
ES		 339 RS_COLUMN_INVALID,
340 RS_COLUMN_INVALID,
341 RS_COLUMN_INVALID,
b3b06a32
ES		 342 },
343 .checks = {
344 rs_mimo_allow,
345 rs_sgi_allow,
346 },
347 },
348};
349
8ca151b5
JB		 350static inline u8 rs_extract_rate(u32 rate_n_flags)
351{
352 /* also works for HT because bits 7:6 are zero there */
353 return (u8)(rate_n_flags & RATE_LEGACY_RATE_MSK);
354}
355
356static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
357{
358 int idx = 0;
359
8ca151b5 360 if (rate_n_flags & RATE_MCS_HT_MSK) {
d310e405
ES		 361 idx = rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK;
362 idx += IWL_RATE_MCS_0_INDEX;
8ca151b5 363
d310e405 364 /* skip 9M not supported in HT*/
8ca151b5
JB		 365 if (idx >= IWL_RATE_9M_INDEX)
366 idx += 1;
4e82dd3a 367 if ((idx >= IWL_FIRST_HT_RATE) && (idx <= IWL_LAST_HT_RATE))
8ca151b5 368 return idx;
d310e405
ES		 369 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
370 idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
371 idx += IWL_RATE_MCS_0_INDEX;
8ca151b5 372
d310e405
ES		 373 /* skip 9M not supported in VHT*/
374 if (idx >= IWL_RATE_9M_INDEX)
375 idx++;
376 if ((idx >= IWL_FIRST_VHT_RATE) && (idx <= IWL_LAST_VHT_RATE))
377 return idx;
8ca151b5 378 } else {
d310e405
ES		 379 /* legacy rate format, search for match in table */
380
381 u8 legacy_rate = rs_extract_rate(rate_n_flags);
8ca151b5 382 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
d310e405 383 if (iwl_rates[idx].plcp == legacy_rate)
8ca151b5
JB		 384 return idx;
385 }
386
560843f4 387 return IWL_RATE_INVALID;
8ca151b5
JB		 388}
389
390static void rs_rate_scale_perform(struct iwl_mvm *mvm,
1ebc8f2e
ES		 391 struct ieee80211_sta *sta,
392 struct iwl_lq_sta *lq_sta,
ff7a68d0 393 int tid, bool ndp);
8fc7c58c
ES		 394static void rs_fill_lq_cmd(struct iwl_mvm *mvm,
395 struct ieee80211_sta *sta,
396 struct iwl_lq_sta *lq_sta,
397 const struct rs_rate *initial_rate);
8ca151b5 398static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search);
8ca151b5 399
8ca151b5
JB		 400/**
401 * The following tables contain the expected throughput metrics for all rates
402 *
403 * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits
404 *
405 * where invalid entries are zeros.
406 *
407 * CCK rates are only valid in legacy table and will only be used in G
408 * (2.4 GHz) band.
409 */
410
a34529e8 411static const u16 expected_tpt_legacy[IWL_RATE_COUNT] = {
4e82dd3a 412 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0, 0, 0
8ca151b5
JB		 413};
414
4e82dd3a
ES		 415/* Expected TpT tables. 4 indexes:
416 * 0 - NGI, 1 - SGI, 2 - AGG+NGI, 3 - AGG+SGI
417 */
a34529e8 418static const u16 expected_tpt_siso_20MHz[4][IWL_RATE_COUNT] = {
4e82dd3a
ES		 419 {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202, 216, 0},
420 {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210, 225, 0},
421 {0, 0, 0, 0, 49, 0, 97, 145, 192, 285, 375, 420, 464, 551, 0},
422 {0, 0, 0, 0, 54, 0, 108, 160, 213, 315, 415, 465, 513, 608, 0},
8ca151b5
JB		 423};
424
a34529e8 425static const u16 expected_tpt_siso_40MHz[4][IWL_RATE_COUNT] = {
4e82dd3a
ES		 426 {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257, 269, 275},
427 {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264, 275, 280},
428 {0, 0, 0, 0, 101, 0, 199, 295, 389, 570, 744, 828, 911, 1070, 1173},
429 {0, 0, 0, 0, 112, 0, 220, 326, 429, 629, 819, 912, 1000, 1173, 1284},
8ca151b5
JB		 430};
431
a34529e8 432static const u16 expected_tpt_siso_80MHz[4][IWL_RATE_COUNT] = {
d310e405
ES		 433 {0, 0, 0, 0, 130, 0, 191, 223, 244, 273, 288, 294, 298, 305, 308},
434 {0, 0, 0, 0, 138, 0, 200, 231, 251, 279, 293, 298, 302, 308, 312},
435 {0, 0, 0, 0, 217, 0, 429, 634, 834, 1220, 1585, 1760, 1931, 2258, 2466},
436 {0, 0, 0, 0, 241, 0, 475, 701, 921, 1343, 1741, 1931, 2117, 2468, 2691},
437};
438
855f492f
GG		 439static const u16 expected_tpt_siso_160MHz[4][IWL_RATE_COUNT] = {
440 {0, 0, 0, 0, 191, 0, 244, 288, 298, 308, 313, 318, 323, 328, 330},
441 {0, 0, 0, 0, 200, 0, 251, 293, 302, 312, 317, 322, 327, 332, 334},
442 {0, 0, 0, 0, 439, 0, 875, 1307, 1736, 2584, 3419, 3831, 4240, 5049, 5581},
443 {0, 0, 0, 0, 488, 0, 972, 1451, 1925, 2864, 3785, 4240, 4691, 5581, 6165},
444};
445
a34529e8 446static const u16 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = {
4e82dd3a
ES		 447 {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250, 261, 0},
448 {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256, 267, 0},
449 {0, 0, 0, 0, 98, 0, 193, 286, 375, 550, 718, 799, 878, 1032, 0},
450 {0, 0, 0, 0, 109, 0, 214, 316, 414, 607, 790, 879, 965, 1132, 0},
8ca151b5
JB		 451};
452
a34529e8 453static const u16 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = {
4e82dd3a
ES		 454 {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289, 296, 300},
455 {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293, 300, 303},
456 {0, 0, 0, 0, 200, 0, 390, 571, 741, 1067, 1365, 1505, 1640, 1894, 2053},
457 {0, 0, 0, 0, 221, 0, 430, 630, 816, 1169, 1490, 1641, 1784, 2053, 2221},
8ca151b5
JB		 458};
459
a34529e8 460static const u16 expected_tpt_mimo2_80MHz[4][IWL_RATE_COUNT] = {
d310e405
ES		 461 {0, 0, 0, 0, 182, 0, 240, 264, 278, 299, 308, 311, 313, 317, 319},
462 {0, 0, 0, 0, 190, 0, 247, 269, 282, 302, 310, 313, 315, 319, 320},
463 {0, 0, 0, 0, 428, 0, 833, 1215, 1577, 2254, 2863, 3147, 3418, 3913, 4219},
464 {0, 0, 0, 0, 474, 0, 920, 1338, 1732, 2464, 3116, 3418, 3705, 4225, 4545},
465};
466
855f492f
GG		 467static const u16 expected_tpt_mimo2_160MHz[4][IWL_RATE_COUNT] = {
468 {0, 0, 0, 0, 240, 0, 278, 308, 313, 319, 322, 324, 328, 330, 334},
469 {0, 0, 0, 0, 247, 0, 282, 310, 315, 320, 323, 325, 329, 332, 338},
470 {0, 0, 0, 0, 875, 0, 1735, 2582, 3414, 5043, 6619, 7389, 8147, 9629, 10592},
471 {0, 0, 0, 0, 971, 0, 1925, 2861, 3779, 5574, 7304, 8147, 8976, 10592, 11640},
472};
473
8ca151b5
JB		 474/* mbps, mcs */
475static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = {
476 { "1", "BPSK DSSS"},
477 { "2", "QPSK DSSS"},
478 {"5.5", "BPSK CCK"},
479 { "11", "QPSK CCK"},
480 { "6", "BPSK 1/2"},
481 { "9", "BPSK 1/2"},
482 { "12", "QPSK 1/2"},
483 { "18", "QPSK 3/4"},
484 { "24", "16QAM 1/2"},
485 { "36", "16QAM 3/4"},
486 { "48", "64QAM 2/3"},
487 { "54", "64QAM 3/4"},
488 { "60", "64QAM 5/6"},
489};
490
491#define MCS_INDEX_PER_STREAM (8)
492
9d10849e
EG		 493static const char *rs_pretty_ant(u8 ant)
494{
495 static const char * const ant_name[] = {
496 [ANT_NONE] = "None",
497 [ANT_A] = "A",
498 [ANT_B] = "B",
499 [ANT_AB] = "AB",
500 [ANT_C] = "C",
501 [ANT_AC] = "AC",
502 [ANT_BC] = "BC",
503 [ANT_ABC] = "ABC",
504 };
505
506 if (ant > ANT_ABC)
507 return "UNKNOWN";
508
509 return ant_name[ant];
510}
511
512static const char *rs_pretty_lq_type(enum iwl_table_type type)
513{
514 static const char * const lq_types[] = {
515 [LQ_NONE] = "NONE",
516 [LQ_LEGACY_A] = "LEGACY_A",
517 [LQ_LEGACY_G] = "LEGACY_G",
518 [LQ_HT_SISO] = "HT SISO",
519 [LQ_HT_MIMO2] = "HT MIMO",
520 [LQ_VHT_SISO] = "VHT SISO",
521 [LQ_VHT_MIMO2] = "VHT MIMO",
522 };
523
524 if (type < LQ_NONE || type >= LQ_MAX)
525 return "UNKNOWN";
526
527 return lq_types[type];
528}
529
cc60c6e9
ES		 530static char *rs_pretty_rate(const struct rs_rate *rate)
531{
532 static char buf[40];
533 static const char * const legacy_rates[] = {
534 [IWL_RATE_1M_INDEX] = "1M",
535 [IWL_RATE_2M_INDEX] = "2M",
536 [IWL_RATE_5M_INDEX] = "5.5M",
537 [IWL_RATE_11M_INDEX] = "11M",
538 [IWL_RATE_6M_INDEX] = "6M",
539 [IWL_RATE_9M_INDEX] = "9M",
540 [IWL_RATE_12M_INDEX] = "12M",
541 [IWL_RATE_18M_INDEX] = "18M",
542 [IWL_RATE_24M_INDEX] = "24M",
543 [IWL_RATE_36M_INDEX] = "36M",
544 [IWL_RATE_48M_INDEX] = "48M",
545 [IWL_RATE_54M_INDEX] = "54M",
546 };
547 static const char *const ht_vht_rates[] = {
548 [IWL_RATE_MCS_0_INDEX] = "MCS0",
549 [IWL_RATE_MCS_1_INDEX] = "MCS1",
550 [IWL_RATE_MCS_2_INDEX] = "MCS2",
551 [IWL_RATE_MCS_3_INDEX] = "MCS3",
552 [IWL_RATE_MCS_4_INDEX] = "MCS4",
553 [IWL_RATE_MCS_5_INDEX] = "MCS5",
554 [IWL_RATE_MCS_6_INDEX] = "MCS6",
555 [IWL_RATE_MCS_7_INDEX] = "MCS7",
556 [IWL_RATE_MCS_8_INDEX] = "MCS8",
557 [IWL_RATE_MCS_9_INDEX] = "MCS9",
558 };
559 const char *rate_str;
560
e8b3f7b6 561 if (is_type_legacy(rate->type) && (rate->index <= IWL_RATE_54M_INDEX))
cc60c6e9 562 rate_str = legacy_rates[rate->index];
e8b3f7b6 563 else if ((is_type_ht(rate->type) || is_type_vht(rate->type)) &&
4494541c 564 (rate->index >= IWL_RATE_MCS_0_INDEX) &&
e8b3f7b6 565 (rate->index <= IWL_RATE_MCS_9_INDEX))
cc60c6e9
ES		 566 rate_str = ht_vht_rates[rate->index];
567 else
568 rate_str = "BAD_RATE";
569
570 sprintf(buf, "(%s|%s|%s)", rs_pretty_lq_type(rate->type),
571 rs_pretty_ant(rate->ant), rate_str);
572 return buf;
573}
574
5aa33553
ES		 575static inline void rs_dump_rate(struct iwl_mvm *mvm, const struct rs_rate *rate,
576 const char *prefix)
577{
d8bafeaf 578 IWL_DEBUG_RATE(mvm,
cc60c6e9
ES		 579 "%s: %s BW: %d SGI: %d LDPC: %d STBC: %d\n",
580 prefix, rs_pretty_rate(rate), rate->bw,
581 rate->sgi, rate->ldpc, rate->stbc);
5aa33553
ES		 582}
583
8ca151b5
JB		 584static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window)
585{
586 window->data = 0;
587 window->success_counter = 0;
588 window->success_ratio = IWL_INVALID_VALUE;
589 window->counter = 0;
590 window->average_tpt = IWL_INVALID_VALUE;
8ca151b5
JB		 591}
592
b804eeb6
ES		 593static void rs_rate_scale_clear_tbl_windows(struct iwl_mvm *mvm,
594 struct iwl_scale_tbl_info *tbl)
3ca71f60
EP		 595{
596 int i;
597
b804eeb6 598 IWL_DEBUG_RATE(mvm, "Clearing up window stats\n");
3ca71f60
EP		 599 for (i = 0; i < IWL_RATE_COUNT; i++)
600 rs_rate_scale_clear_window(&tbl->win[i]);
2fd647f8
EP		 601
602 for (i = 0; i < ARRAY_SIZE(tbl->tpc_win); i++)
603 rs_rate_scale_clear_window(&tbl->tpc_win[i]);
3ca71f60
EP		 604}
605
8ca151b5
JB		 606static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type)
607{
608 return (ant_type & valid_antenna) == ant_type;
609}
610
8ca151b5 611static int rs_tl_turn_on_agg_for_tid(struct iwl_mvm *mvm,
40ce5ed1
ES		 612 struct iwl_lq_sta *lq_data, u8 tid,
613 struct ieee80211_sta *sta)
8ca151b5
JB		 614{
615 int ret = -EAGAIN;
8ca151b5 616
44cc429c
EG		 617 IWL_DEBUG_HT(mvm, "Starting Tx agg: STA: %pM tid: %d\n",
618 sta->addr, tid);
482e4844
GG		 619
620 /* start BA session until the peer sends del BA */
621 ret = ieee80211_start_tx_ba_session(sta, tid, 0);
44cc429c
EG		 622 if (ret == -EAGAIN) {
623 /*
624 * driver and mac80211 is out of sync
625 * this might be cause by reloading firmware
626 * stop the tx ba session here
627 */
628 IWL_ERR(mvm, "Fail start Tx agg on tid: %d\n",
629 tid);
630 ieee80211_stop_tx_ba_session(sta, tid);
8ca151b5
JB		 631 }
632 return ret;
633}
634
482e4844
GG		 635static void rs_tl_turn_on_agg(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
636 u8 tid, struct iwl_lq_sta *lq_sta,
8ca151b5
JB		 637 struct ieee80211_sta *sta)
638{
482e4844
GG		 639 struct iwl_mvm_tid_data *tid_data;
640
641 /*
642 * In AP mode, tid can be equal to IWL_MAX_TID_COUNT
643 * when the frame is not QoS
644 */
645 if (WARN_ON_ONCE(tid > IWL_MAX_TID_COUNT)) {
8ca151b5
JB		 646 IWL_ERR(mvm, "tid exceeds max TID count: %d/%d\n",
647 tid, IWL_MAX_TID_COUNT);
482e4844
GG		 648 return;
649 } else if (tid == IWL_MAX_TID_COUNT) {
650 return;
651 }
652
653 tid_data = &mvmsta->tid_data[tid];
654 if ((tid_data->state == IWL_AGG_OFF) &&
655 (lq_sta->tx_agg_tid_en & BIT(tid)) &&
656 (tid_data->tx_count_last >= IWL_MVM_RS_AGG_START_THRESHOLD)) {
657 IWL_DEBUG_RATE(mvm, "try to aggregate tid %d\n", tid);
bd800e41
NG		 658 if (rs_tl_turn_on_agg_for_tid(mvm, lq_sta, tid, sta) == 0)
659 tid_data->state = IWL_AGG_QUEUED;
482e4844 660 }
8ca151b5
JB		 661}
662
663static inline int get_num_of_ant_from_rate(u32 rate_n_flags)
664{
665 return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) +
666 !!(rate_n_flags & RATE_MCS_ANT_B_MSK) +
667 !!(rate_n_flags & RATE_MCS_ANT_C_MSK);
668}
669
670/*
671 * Static function to get the expected throughput from an iwl_scale_tbl_info
672 * that wraps a NULL pointer check
673 */
674static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index)
675{
676 if (tbl->expected_tpt)
677 return tbl->expected_tpt[rs_index];
678 return 0;
679}
680
681/**
682 * rs_collect_tx_data - Update the success/failure sliding window
683 *
684 * We keep a sliding window of the last 62 packets transmitted
685 * at this rate. window->data contains the bitmask of successful
686 * packets.
687 */
834437da
ES		 688static int _rs_collect_tx_data(struct iwl_mvm *mvm,
689 struct iwl_scale_tbl_info *tbl,
0bd3c5a7
EP		 690 int scale_index, int attempts, int successes,
691 struct iwl_rate_scale_data *window)
8ca151b5 692{
8ca151b5
JB		 693 static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1));
694 s32 fail_count, tpt;
695
8ca151b5
JB		 696 /* Get expected throughput */
697 tpt = get_expected_tpt(tbl, scale_index);
698
699 /*
700 * Keep track of only the latest 62 tx frame attempts in this rate's
701 * history window; anything older isn't really relevant any more.
702 * If we have filled up the sliding window, drop the oldest attempt;
703 * if the oldest attempt (highest bit in bitmap) shows "success",
704 * subtract "1" from the success counter (this is the main reason
705 * we keep these bitmaps!).
706 */
707 while (attempts > 0) {
708 if (window->counter >= IWL_RATE_MAX_WINDOW) {
709 /* remove earliest */
710 window->counter = IWL_RATE_MAX_WINDOW - 1;
711
712 if (window->data & mask) {
713 window->data &= ~mask;
714 window->success_counter--;
715 }
716 }
717
718 /* Increment frames-attempted counter */
719 window->counter++;
720
721 /* Shift bitmap by one frame to throw away oldest history */
722 window->data <<= 1;
723
724 /* Mark the most recent #successes attempts as successful */
725 if (successes > 0) {
726 window->success_counter++;
727 window->data |= 0x1;
728 successes--;
729 }
730
731 attempts--;
732 }
733
734 /* Calculate current success ratio, avoid divide-by-0! */
735 if (window->counter > 0)
736 window->success_ratio = 128 * (100 * window->success_counter)
737 / window->counter;
738 else
739 window->success_ratio = IWL_INVALID_VALUE;
740
741 fail_count = window->counter - window->success_counter;
742
743 /* Calculate average throughput, if we have enough history. */
834437da
ES		 744 if ((fail_count >= IWL_MVM_RS_RATE_MIN_FAILURE_TH) ||
745 (window->success_counter >= IWL_MVM_RS_RATE_MIN_SUCCESS_TH))
8ca151b5
JB		 746 window->average_tpt = (window->success_ratio * tpt + 64) / 128;
747 else
748 window->average_tpt = IWL_INVALID_VALUE;
749
8ca151b5
JB		 750 return 0;
751}
752
69c7fda4
GG		 753static int rs_collect_tpc_data(struct iwl_mvm *mvm,
754 struct iwl_lq_sta *lq_sta,
755 struct iwl_scale_tbl_info *tbl,
756 int scale_index, int attempts, int successes,
757 u8 reduced_txp)
758{
759 struct iwl_rate_scale_data *window = NULL;
760
761 if (WARN_ON_ONCE(reduced_txp > TPC_MAX_REDUCTION))
762 return -EINVAL;
763
764 window = &tbl->tpc_win[reduced_txp];
765 return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes,
766 window);
767}
768
482e4844
GG		 769static void rs_update_tid_tpt_stats(struct iwl_mvm *mvm,
770 struct iwl_mvm_sta *mvmsta,
771 u8 tid, int successes)
772{
773 struct iwl_mvm_tid_data *tid_data;
774
775 if (tid >= IWL_MAX_TID_COUNT)
776 return;
777
778 tid_data = &mvmsta->tid_data[tid];
779
780 /*
781 * Measure if there're enough successful transmits per second.
782 * These statistics are used only to decide if we can start a
783 * BA session, so it should be updated only when A-MPDU is
784 * off.
785 */
786 if (tid_data->state != IWL_AGG_OFF)
787 return;
788
789 if (time_is_before_jiffies(tid_data->tpt_meas_start + HZ) ||
790 (tid_data->tx_count >= IWL_MVM_RS_AGG_START_THRESHOLD)) {
791 tid_data->tx_count_last = tid_data->tx_count;
792 tid_data->tx_count = 0;
793 tid_data->tpt_meas_start = jiffies;
794 } else {
795 tid_data->tx_count += successes;
796 }
797}
798
69c7fda4 799static int rs_collect_tlc_data(struct iwl_mvm *mvm,
482e4844 800 struct iwl_mvm_sta *mvmsta, u8 tid,
69c7fda4
GG		 801 struct iwl_scale_tbl_info *tbl,
802 int scale_index, int attempts, int successes)
0bd3c5a7
EP		 803{
804 struct iwl_rate_scale_data *window = NULL;
805
806 if (scale_index < 0 || scale_index >= IWL_RATE_COUNT)
807 return -EINVAL;
808
757cf23b 809 if (tbl->column != RS_COLUMN_INVALID) {
ecaf71de 810 struct lq_sta_pers *pers = &mvmsta->lq_sta.rs_drv.pers;
f58220f6
ES		 811
812 pers->tx_stats[tbl->column][scale_index].total += attempts;
813 pers->tx_stats[tbl->column][scale_index].success += successes;
757cf23b
ES		 814 }
815
482e4844
GG		 816 rs_update_tid_tpt_stats(mvm, mvmsta, tid, successes);
817
0bd3c5a7
EP		 818 /* Select window for current tx bit rate */
819 window = &(tbl->win[scale_index]);
834437da 820 return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes,
0bd3c5a7
EP		 821 window);
822}
823
5aa33553
ES		 824/* Convert rs_rate object into ucode rate bitmask */
825static u32 ucode_rate_from_rs_rate(struct iwl_mvm *mvm,
8fc7c58c 826 struct rs_rate *rate)
8ca151b5 827{
5aa33553
ES		 828 u32 ucode_rate = 0;
829 int index = rate->index;
8ca151b5 830
5aa33553 831 ucode_rate |= ((rate->ant << RATE_MCS_ANT_POS) &
d310e405
ES		 832 RATE_MCS_ANT_ABC_MSK);
833
5aa33553
ES		 834 if (is_legacy(rate)) {
835 ucode_rate |= iwl_rates[index].plcp;
8ca151b5 836 if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE)
5aa33553
ES		 837 ucode_rate |= RATE_MCS_CCK_MSK;
838 return ucode_rate;
d310e405
ES		 839 }
840
5aa33553 841 if (is_ht(rate)) {
d310e405 842 if (index < IWL_FIRST_HT_RATE || index > IWL_LAST_HT_RATE) {
8ca151b5 843 IWL_ERR(mvm, "Invalid HT rate index %d\n", index);
4e82dd3a 844 index = IWL_LAST_HT_RATE;
8ca151b5 845 }
5aa33553 846 ucode_rate |= RATE_MCS_HT_MSK;
8ca151b5 847
5aa33553
ES		 848 if (is_ht_siso(rate))
849 ucode_rate |= iwl_rates[index].plcp_ht_siso;
850 else if (is_ht_mimo2(rate))
851 ucode_rate |= iwl_rates[index].plcp_ht_mimo2;
8ca151b5 852 else
d972ab31 853 WARN_ON_ONCE(1);
5aa33553 854 } else if (is_vht(rate)) {
d310e405
ES		 855 if (index < IWL_FIRST_VHT_RATE || index > IWL_LAST_VHT_RATE) {
856 IWL_ERR(mvm, "Invalid VHT rate index %d\n", index);
857 index = IWL_LAST_VHT_RATE;
858 }
5aa33553
ES		 859 ucode_rate |= RATE_MCS_VHT_MSK;
860 if (is_vht_siso(rate))
861 ucode_rate |= iwl_rates[index].plcp_vht_siso;
862 else if (is_vht_mimo2(rate))
863 ucode_rate |= iwl_rates[index].plcp_vht_mimo2;
d310e405
ES		 864 else
865 WARN_ON_ONCE(1);
866
8ca151b5 867 } else {
5aa33553 868 IWL_ERR(mvm, "Invalid rate->type %d\n", rate->type);
8ca151b5
JB		 869 }
870
d8bafeaf
ES		 871 if (is_siso(rate) && rate->stbc) {
872 /* To enable STBC we need to set both a flag and ANT_AB */
873 ucode_rate |= RATE_MCS_ANT_AB_MSK;
77e40945 874 ucode_rate |= RATE_MCS_STBC_MSK;
d8bafeaf
ES		 875 }
876
5aa33553
ES		 877 ucode_rate |= rate->bw;
878 if (rate->sgi)
879 ucode_rate |= RATE_MCS_SGI_MSK;
a3576ff2
ES		 880 if (rate->ldpc)
881 ucode_rate |= RATE_MCS_LDPC_MSK;
d310e405 882
5aa33553 883 return ucode_rate;
8ca151b5
JB		 884}
885
5aa33553
ES		 886/* Convert a ucode rate into an rs_rate object */
887static int rs_rate_from_ucode_rate(const u32 ucode_rate,
57fbcce3 888 enum nl80211_band band,
5aa33553 889 struct rs_rate *rate)
8ca151b5 890{
5aa33553
ES		 891 u32 ant_msk = ucode_rate & RATE_MCS_ANT_ABC_MSK;
892 u8 num_of_ant = get_num_of_ant_from_rate(ucode_rate);
d310e405 893 u8 nss;
8ca151b5 894
9e898f1b 895 memset(rate, 0, sizeof(*rate));
5aa33553 896 rate->index = iwl_hwrate_to_plcp_idx(ucode_rate);
8ca151b5 897
560843f4 898 if (rate->index == IWL_RATE_INVALID)
8ca151b5 899 return -EINVAL;
5aa33553
ES		 900
901 rate->ant = (ant_msk >> RATE_MCS_ANT_POS);
8ca151b5 902
d310e405 903 /* Legacy */
5aa33553
ES		 904 if (!(ucode_rate & RATE_MCS_HT_MSK) &&
905 !(ucode_rate & RATE_MCS_VHT_MSK)) {
8ca151b5 906 if (num_of_ant == 1) {
57fbcce3 907 if (band == NL80211_BAND_5GHZ)
5aa33553 908 rate->type = LQ_LEGACY_A;
8ca151b5 909 else
5aa33553 910 rate->type = LQ_LEGACY_G;
8ca151b5 911 }
d310e405
ES		 912
913 return 0;
914 }
915
916 /* HT or VHT */
5aa33553
ES		 917 if (ucode_rate & RATE_MCS_SGI_MSK)
918 rate->sgi = true;
a3576ff2
ES		 919 if (ucode_rate & RATE_MCS_LDPC_MSK)
920 rate->ldpc = true;
77e40945 921 if (ucode_rate & RATE_MCS_STBC_MSK)
d8bafeaf 922 rate->stbc = true;
ba69d0e3
ES		 923 if (ucode_rate & RATE_MCS_BF_MSK)
924 rate->bfer = true;
d310e405 925
5aa33553 926 rate->bw = ucode_rate & RATE_MCS_CHAN_WIDTH_MSK;
d310e405 927
5aa33553
ES		 928 if (ucode_rate & RATE_MCS_HT_MSK) {
929 nss = ((ucode_rate & RATE_HT_MCS_NSS_MSK) >>
d310e405
ES		 930 RATE_HT_MCS_NSS_POS) + 1;
931
932 if (nss == 1) {
5aa33553 933 rate->type = LQ_HT_SISO;
ba69d0e3
ES		 934 WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1,
935 "stbc %d bfer %d",
936 rate->stbc, rate->bfer);
d310e405 937 } else if (nss == 2) {
5aa33553 938 rate->type = LQ_HT_MIMO2;
d310e405 939 WARN_ON_ONCE(num_of_ant != 2);
8ca151b5 940 } else {
d310e405
ES		 941 WARN_ON_ONCE(1);
942 }
5aa33553
ES		 943 } else if (ucode_rate & RATE_MCS_VHT_MSK) {
944 nss = ((ucode_rate & RATE_VHT_MCS_NSS_MSK) >>
d310e405
ES		 945 RATE_VHT_MCS_NSS_POS) + 1;
946
947 if (nss == 1) {
5aa33553 948 rate->type = LQ_VHT_SISO;
ba69d0e3
ES		 949 WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1,
950 "stbc %d bfer %d",
951 rate->stbc, rate->bfer);
d310e405 952 } else if (nss == 2) {
5aa33553 953 rate->type = LQ_VHT_MIMO2;
d310e405
ES		 954 WARN_ON_ONCE(num_of_ant != 2);
955 } else {
956 WARN_ON_ONCE(1);
8ca151b5
JB		 957 }
958 }
d310e405 959
5aa33553
ES		 960 WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_80 &&
961 !is_vht(rate));
d310e405 962
8ca151b5
JB		 963 return 0;
964}
965
966/* switch to another antenna/antennas and return 1 */
967/* if no other valid antenna found, return 0 */
8fc7c58c 968static int rs_toggle_antenna(u32 valid_ant, struct rs_rate *rate)
8ca151b5
JB		 969{
970 u8 new_ant_type;
971
82d2b9a6 972 if (!rate->ant || WARN_ON_ONCE(rate->ant & ANT_C))
8ca151b5
JB		 973 return 0;
974
5aa33553 975 if (!rs_is_valid_ant(valid_ant, rate->ant))
8ca151b5
JB		 976 return 0;
977
5aa33553 978 new_ant_type = ant_toggle_lookup[rate->ant];
8ca151b5 979
5aa33553 980 while ((new_ant_type != rate->ant) &&
8ca151b5
JB		 981 !rs_is_valid_ant(valid_ant, new_ant_type))
982 new_ant_type = ant_toggle_lookup[new_ant_type];
983
5aa33553 984 if (new_ant_type == rate->ant)
8ca151b5
JB		 985 return 0;
986
5aa33553
ES		 987 rate->ant = new_ant_type;
988
8ca151b5
JB		 989 return 1;
990}
991
8ca151b5 992static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta,
5aa33553 993 struct rs_rate *rate)
8ca151b5 994{
5aa33553 995 if (is_legacy(rate))
8ca151b5 996 return lq_sta->active_legacy_rate;
5aa33553 997 else if (is_siso(rate))
d310e405 998 return lq_sta->active_siso_rate;
5aa33553 999 else if (is_mimo2(rate))
d310e405
ES		 1000 return lq_sta->active_mimo2_rate;
1001
1002 WARN_ON_ONCE(1);
1003 return 0;
8ca151b5
JB		 1004}
1005
1006static u16 rs_get_adjacent_rate(struct iwl_mvm *mvm, u8 index, u16 rate_mask,
1007 int rate_type)
1008{
1009 u8 high = IWL_RATE_INVALID;
1010 u8 low = IWL_RATE_INVALID;
1011
1012 /* 802.11A or ht walks to the next literal adjacent rate in
1013 * the rate table */
5aa33553 1014 if (is_type_a_band(rate_type) || !is_type_legacy(rate_type)) {
8ca151b5
JB		 1015 int i;
1016 u32 mask;
1017
1018 /* Find the previous rate that is in the rate mask */
1019 i = index - 1;
43d59a4c
EG		 1020 if (i >= 0)
1021 mask = BIT(i);
1022 for (; i >= 0; i--, mask >>= 1) {
8ca151b5
JB		 1023 if (rate_mask & mask) {
1024 low = i;
1025 break;
1026 }
1027 }
1028
1029 /* Find the next rate that is in the rate mask */
1030 i = index + 1;
1031 for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) {
1032 if (rate_mask & mask) {
1033 high = i;
1034 break;
1035 }
1036 }
1037
1038 return (high << 8) | low;
1039 }
1040
1041 low = index;
1042 while (low != IWL_RATE_INVALID) {
1043 low = iwl_rates[low].prev_rs;
1044 if (low == IWL_RATE_INVALID)
1045 break;
1046 if (rate_mask & (1 << low))
1047 break;
8ca151b5
JB		 1048 }
1049
1050 high = index;
1051 while (high != IWL_RATE_INVALID) {
1052 high = iwl_rates[high].next_rs;
1053 if (high == IWL_RATE_INVALID)
1054 break;
1055 if (rate_mask & (1 << high))
1056 break;
8ca151b5
JB		 1057 }
1058
1059 return (high << 8) | low;
1060}
1061
e07be6d3
ES		 1062static inline bool rs_rate_supported(struct iwl_lq_sta *lq_sta,
1063 struct rs_rate *rate)
8ca151b5 1064{
e07be6d3
ES		 1065 return BIT(rate->index) & rs_get_supported_rates(lq_sta, rate);
1066}
1067
1068/* Get the next supported lower rate in the current column.
1069 * Return true if bottom rate in the current column was reached
1070 */
1071static bool rs_get_lower_rate_in_column(struct iwl_lq_sta *lq_sta,
1072 struct rs_rate *rate)
1073{
1074 u8 low;
8ca151b5 1075 u16 high_low;
e07be6d3 1076 u16 rate_mask;
ae969afe 1077 struct iwl_mvm *mvm = lq_sta->pers.drv;
e07be6d3
ES		 1078
1079 rate_mask = rs_get_supported_rates(lq_sta, rate);
1080 high_low = rs_get_adjacent_rate(mvm, rate->index, rate_mask,
1081 rate->type);
1082 low = high_low & 0xff;
1083
1084 /* Bottom rate of column reached */
1085 if (low == IWL_RATE_INVALID)
1086 return true;
1087
1088 rate->index = low;
1089 return false;
1090}
1091
1092/* Get the next rate to use following a column downgrade */
1093static void rs_get_lower_rate_down_column(struct iwl_lq_sta *lq_sta,
1094 struct rs_rate *rate)
1095{
ae969afe 1096 struct iwl_mvm *mvm = lq_sta->pers.drv;
8ca151b5 1097
e07be6d3
ES		 1098 if (is_legacy(rate)) {
1099 /* No column to downgrade from Legacy */
1100 return;
1101 } else if (is_siso(rate)) {
1102 /* Downgrade to Legacy if we were in SISO */
57fbcce3 1103 if (lq_sta->band == NL80211_BAND_5GHZ)
5aa33553 1104 rate->type = LQ_LEGACY_A;
8ca151b5 1105 else
5aa33553 1106 rate->type = LQ_LEGACY_G;
8ca151b5 1107
a56db7d1 1108 rate->bw = RATE_MCS_CHAN_WIDTH_20;
8ca151b5 1109
b800040d 1110 WARN_ON_ONCE(rate->index < IWL_RATE_MCS_0_INDEX ||
e07be6d3 1111 rate->index > IWL_RATE_MCS_9_INDEX);
8ca151b5 1112
e07be6d3 1113 rate->index = rs_ht_to_legacy[rate->index];
a3576ff2 1114 rate->ldpc = false;
e07be6d3
ES		 1115 } else {
1116 /* Downgrade to SISO with same MCS if in MIMO */
1117 rate->type = is_vht_mimo2(rate) ?
1118 LQ_VHT_SISO : LQ_HT_SISO;
8ca151b5
JB		 1119 }
1120
e07be6d3 1121 if (num_of_ant(rate->ant) > 1)
a0544272 1122 rate->ant = first_antenna(iwl_mvm_get_valid_tx_ant(mvm));
8ca151b5 1123
e07be6d3
ES		 1124 /* Relevant in both switching to SISO or Legacy */
1125 rate->sgi = false;
1126
1127 if (!rs_rate_supported(lq_sta, rate))
1128 rs_get_lower_rate_in_column(lq_sta, rate);
8ca151b5
JB		 1129}
1130
929e6ede
ES		 1131/* Check if both rates share the same column */
1132static inline bool rs_rate_column_match(struct rs_rate *a,
1133 struct rs_rate *b)
8ca151b5 1134{
d8bafeaf
ES		 1135 bool ant_match;
1136
ba69d0e3 1137 if (a->stbc || a->bfer)
d8bafeaf
ES		 1138 ant_match = (b->ant == ANT_A || b->ant == ANT_B);
1139 else
1140 ant_match = (a->ant == b->ant);
1141
1142 return (a->type == b->type) && (a->bw == b->bw) && (a->sgi == b->sgi)
1143 && ant_match;
8ca151b5
JB		 1144}
1145
ad82d8a5
ES		 1146static inline enum rs_column rs_get_column_from_rate(struct rs_rate *rate)
1147{
1148 if (is_legacy(rate)) {
1149 if (rate->ant == ANT_A)
1150 return RS_COLUMN_LEGACY_ANT_A;
1151
1152 if (rate->ant == ANT_B)
1153 return RS_COLUMN_LEGACY_ANT_B;
1154
1155 goto err;
1156 }
1157
1158 if (is_siso(rate)) {
1159 if (rate->ant == ANT_A || rate->stbc || rate->bfer)
1160 return rate->sgi ? RS_COLUMN_SISO_ANT_A_SGI :
1161 RS_COLUMN_SISO_ANT_A;
1162
1163 if (rate->ant == ANT_B)
1164 return rate->sgi ? RS_COLUMN_SISO_ANT_B_SGI :
1165 RS_COLUMN_SISO_ANT_B;
1166
1167 goto err;
1168 }
1169
1170 if (is_mimo(rate))
1171 return rate->sgi ? RS_COLUMN_MIMO2_SGI : RS_COLUMN_MIMO2;
1172
1173err:
1174 return RS_COLUMN_INVALID;
1175}
1176
1ebc8f2e
ES		 1177static u8 rs_get_tid(struct ieee80211_hdr *hdr)
1178{
1179 u8 tid = IWL_MAX_TID_COUNT;
1180
1181 if (ieee80211_is_data_qos(hdr->frame_control)) {
1182 u8 *qc = ieee80211_get_qos_ctl(hdr);
1183 tid = qc[0] & 0xf;
1184 }
1185
1186 if (unlikely(tid > IWL_MAX_TID_COUNT))
1187 tid = IWL_MAX_TID_COUNT;
1188
1189 return tid;
1190}
1191
1192void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
ff7a68d0 1193 int tid, struct ieee80211_tx_info *info, bool ndp)
8ca151b5
JB		 1194{
1195 int legacy_success;
1196 int retries;
929e6ede 1197 int i;
8ca151b5 1198 struct iwl_lq_cmd *table;
929e6ede
ES		 1199 u32 lq_hwrate;
1200 struct rs_rate lq_rate, tx_resp_rate;
8ca151b5 1201 struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl;
ea42d1cb
GG		 1202 u32 tlc_info = (uintptr_t)info->status.status_driver_data[0];
1203 u8 reduced_txp = tlc_info & RS_DRV_DATA_TXP_MSK;
1204 u8 lq_color = RS_DRV_DATA_LQ_COLOR_GET(tlc_info);
929e6ede 1205 u32 tx_resp_hwrate = (uintptr_t)info->status.status_driver_data[1];
1ebc8f2e 1206 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
ecaf71de 1207 struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv;
8ca151b5 1208
8ca151b5
JB		 1209 /* Treat uninitialized rate scaling data same as non-existing. */
1210 if (!lq_sta) {
1211 IWL_DEBUG_RATE(mvm, "Station rate scaling not created yet.\n");
1212 return;
ae969afe 1213 } else if (!lq_sta->pers.drv) {
8ca151b5
JB		 1214 IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n");
1215 return;
1216 }
1217
ad82d8a5
ES		 1218 /* This packet was aggregated but doesn't carry status info */
1219 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
1220 !(info->flags & IEEE80211_TX_STAT_AMPDU))
1221 return;
1222
1223 rs_rate_from_ucode_rate(tx_resp_hwrate, info->band, &tx_resp_rate);
1224
8e96440e 1225#ifdef CONFIG_MAC80211_DEBUGFS
ad82d8a5
ES		 1226 /* Disable last tx check if we are debugging with fixed rate but
1227 * update tx stats */
ae969afe 1228 if (lq_sta->pers.dbg_fixed_rate) {
ad82d8a5
ES		 1229 int index = tx_resp_rate.index;
1230 enum rs_column column;
1231 int attempts, success;
1232
1233 column = rs_get_column_from_rate(&tx_resp_rate);
1234 if (WARN_ONCE(column == RS_COLUMN_INVALID,
1235 "Can't map rate 0x%x to column",
1236 tx_resp_hwrate))
1237 return;
1238
1239 if (info->flags & IEEE80211_TX_STAT_AMPDU) {
1240 attempts = info->status.ampdu_len;
1241 success = info->status.ampdu_ack_len;
1242 } else {
1243 attempts = info->status.rates[0].count;
1244 success = !!(info->flags & IEEE80211_TX_STAT_ACK);
1245 }
1246
1247 lq_sta->pers.tx_stats[column][index].total += attempts;
1248 lq_sta->pers.tx_stats[column][index].success += success;
1249
1250 IWL_DEBUG_RATE(mvm, "Fixed rate 0x%x success %d attempts %d\n",
1251 tx_resp_hwrate, success, attempts);
87d5e415
ES		 1252 return;
1253 }
1254#endif
8ca151b5 1255
87d5e415 1256 if (time_after(jiffies,
834437da
ES		 1257 (unsigned long)(lq_sta->last_tx +
1258 (IWL_MVM_RS_IDLE_TIMEOUT * HZ)))) {
87d5e415 1259 IWL_DEBUG_RATE(mvm, "Tx idle for too long. reinit rs\n");
1ebc8f2e 1260 iwl_mvm_rs_rate_init(mvm, sta, info->band, false);
87d5e415
ES		 1261 return;
1262 }
1263 lq_sta->last_tx = jiffies;
1264
929e6ede
ES		 1265 /* Ignore this Tx frame response if its initial rate doesn't match
1266 * that of latest Link Quality command. There may be stragglers
1267 * from a previous Link Quality command, but we're no longer interested
1268 * in those; they're either from the "active" mode while we're trying
1269 * to check "search" mode, or a prior "search" mode after we've moved
1270 * to a new "search" mode (which might become the new "active" mode).
1271 */
1272 table = &lq_sta->lq;
1273 lq_hwrate = le32_to_cpu(table->rs_table[0]);
1274 rs_rate_from_ucode_rate(lq_hwrate, info->band, &lq_rate);
929e6ede 1275
8ca151b5 1276 /* Here we actually compare this rate to the latest LQ command */
ea42d1cb 1277 if (lq_color != LQ_FLAG_COLOR_GET(table->flags)) {
8ca151b5 1278 IWL_DEBUG_RATE(mvm,
ea42d1cb
GG		 1279 "tx resp color 0x%x does not match 0x%x\n",
1280 lq_color, LQ_FLAG_COLOR_GET(table->flags));
929e6ede 1281
8ca151b5
JB		 1282 /*
1283 * Since rates mis-match, the last LQ command may have failed.
1284 * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with
1285 * ... driver.
1286 */
1287 lq_sta->missed_rate_counter++;
834437da 1288 if (lq_sta->missed_rate_counter > IWL_MVM_RS_MISSED_RATE_MAX) {
8ca151b5 1289 lq_sta->missed_rate_counter = 0;
b3b06a32
ES		 1290 IWL_DEBUG_RATE(mvm,
1291 "Too many rates mismatch. Send sync LQ. rs_state %d\n",
1292 lq_sta->rs_state);
9e680946 1293 iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false);
8ca151b5
JB		 1294 }
1295 /* Regardless, ignore this status info for outdated rate */
1296 return;
1297 } else
1298 /* Rate did match, so reset the missed_rate_counter */
1299 lq_sta->missed_rate_counter = 0;
1300
26a2cc01 1301 if (!lq_sta->search_better_tbl) {
8ca151b5
JB		 1302 curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1303 other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
26a2cc01 1304 } else {
8ca151b5
JB		 1305 curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
1306 other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
26a2cc01
ES		 1307 }
1308
929e6ede 1309 if (WARN_ON_ONCE(!rs_rate_column_match(&lq_rate, &curr_tbl->rate))) {
8ca151b5
JB		 1310 IWL_DEBUG_RATE(mvm,
1311 "Neither active nor search matches tx rate\n");
1312 tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
5aa33553 1313 rs_dump_rate(mvm, &tmp_tbl->rate, "ACTIVE");
8ca151b5 1314 tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
5aa33553 1315 rs_dump_rate(mvm, &tmp_tbl->rate, "SEARCH");
929e6ede 1316 rs_dump_rate(mvm, &lq_rate, "ACTUAL");
5aa33553 1317
8ca151b5
JB		 1318 /*
1319 * no matching table found, let's by-pass the data collection
1320 * and continue to perform rate scale to find the rate table
1321 */
1322 rs_stay_in_table(lq_sta, true);
1323 goto done;
1324 }
1325
1326 /*
1327 * Updating the frame history depends on whether packets were
1328 * aggregated.
1329 *
1330 * For aggregation, all packets were transmitted at the same rate, the
1331 * first index into rate scale table.
1332 */
1333 if (info->flags & IEEE80211_TX_STAT_AMPDU) {
87f55616 1334 rs_collect_tpc_data(mvm, lq_sta, curr_tbl, tx_resp_rate.index,
69c7fda4
GG		 1335 info->status.ampdu_len,
1336 info->status.ampdu_ack_len,
1337 reduced_txp);
1338
1339 /* ampdu_ack_len = 0 marks no BA was received. For TLC, treat
1340 * it as a single frame loss as we don't want the success ratio
1341 * to dip too quickly because a BA wasn't received.
1342 * For TPC, there's no need for this optimisation since we want
1343 * to recover very quickly from a bad power reduction and,
1344 * therefore we'd like the success ratio to get an immediate hit
1345 * when failing to get a BA, so we'd switch back to a lower or
1346 * zero power reduction. When FW transmits agg with a rate
1347 * different from the initial rate, it will not use reduced txp
1348 * and will send BA notification twice (one empty with reduced
1349 * txp equal to the value from LQ and one with reduced txp 0).
1350 * We need to update counters for each txp level accordingly.
d6bda667
ES		 1351 */
1352 if (info->status.ampdu_ack_len == 0)
1353 info->status.ampdu_len = 1;
1354
5307eca1 1355 rs_collect_tlc_data(mvm, mvmsta, tid, curr_tbl, tx_resp_rate.index,
69c7fda4
GG		 1356 info->status.ampdu_len,
1357 info->status.ampdu_ack_len);
8ca151b5
JB		 1358
1359 /* Update success/fail counts if not searching for new mode */
b3b06a32 1360 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {
8ca151b5
JB		 1361 lq_sta->total_success += info->status.ampdu_ack_len;
1362 lq_sta->total_failed += (info->status.ampdu_len -
1363 info->status.ampdu_ack_len);
1364 }
1365 } else {
90cb1237 1366 /* For legacy, update frame history with for each Tx retry. */
8ca151b5
JB		 1367 retries = info->status.rates[0].count - 1;
1368 /* HW doesn't send more than 15 retries */
1369 retries = min(retries, 15);
1370
1371 /* The last transmission may have been successful */
1372 legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK);
1373 /* Collect data for each rate used during failed TX attempts */
1374 for (i = 0; i <= retries; ++i) {
929e6ede
ES		 1375 lq_hwrate = le32_to_cpu(table->rs_table[i]);
1376 rs_rate_from_ucode_rate(lq_hwrate, info->band,
1377 &lq_rate);
8ca151b5
JB		 1378 /*
1379 * Only collect stats if retried rate is in the same RS
1380 * table as active/search.
1381 */
929e6ede 1382 if (rs_rate_column_match(&lq_rate, &curr_tbl->rate))
8ca151b5 1383 tmp_tbl = curr_tbl;
929e6ede
ES		 1384 else if (rs_rate_column_match(&lq_rate,
1385 &other_tbl->rate))
8ca151b5 1386 tmp_tbl = other_tbl;
4107dbd2 1387 else
8ca151b5 1388 continue;
4107dbd2 1389
69c7fda4 1390 rs_collect_tpc_data(mvm, lq_sta, tmp_tbl,
87f55616 1391 tx_resp_rate.index, 1,
69c7fda4
GG		 1392 i < retries ? 0 : legacy_success,
1393 reduced_txp);
482e4844 1394 rs_collect_tlc_data(mvm, mvmsta, tid, tmp_tbl,
87f55616 1395 tx_resp_rate.index, 1,
69c7fda4 1396 i < retries ? 0 : legacy_success);
8ca151b5
JB		 1397 }
1398
1399 /* Update success/fail counts if not searching for new mode */
b3b06a32 1400 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {
8ca151b5
JB		 1401 lq_sta->total_success += legacy_success;
1402 lq_sta->total_failed += retries + (1 - legacy_success);
1403 }
1404 }
1405 /* The last TX rate is cached in lq_sta; it's set in if/else above */
929e6ede 1406 lq_sta->last_rate_n_flags = lq_hwrate;
2fd647f8 1407 IWL_DEBUG_RATE(mvm, "reduced txpower: %d\n", reduced_txp);
8ca151b5
JB		 1408done:
1409 /* See if there's a better rate or modulation mode to try. */
8dfc2751 1410 if (sta->supp_rates[info->band])
ff7a68d0 1411 rs_rate_scale_perform(mvm, sta, lq_sta, tid, ndp);
1ebc8f2e
ES		 1412}
1413
1414/*
1415 * mac80211 sends us Tx status
1416 */
9f66a397
GG		 1417static void rs_drv_mac80211_tx_status(void *mvm_r,
1418 struct ieee80211_supported_band *sband,
1419 struct ieee80211_sta *sta, void *priv_sta,
1420 struct sk_buff *skb)
1ebc8f2e
ES		 1421{
1422 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
9f66a397 1423 struct iwl_op_mode *op_mode = mvm_r;
1ebc8f2e
ES		 1424 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1425 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1426
dcbc17ad
JB		 1427 if (!iwl_mvm_sta_from_mac80211(sta)->vif)
1428 return;
1429
1ebc8f2e
ES		 1430 if (!ieee80211_is_data(hdr->frame_control) ||
1431 info->flags & IEEE80211_TX_CTL_NO_ACK)
1432 return;
1433
ff7a68d0
MG		 1434 iwl_mvm_rs_tx_status(mvm, sta, rs_get_tid(hdr), info,
1435 ieee80211_is_qos_nullfunc(hdr->frame_control));
8ca151b5
JB		 1436}
1437
1438/*
1439 * Begin a period of staying with a selected modulation mode.
1440 * Set "stay_in_tbl" flag to prevent any mode switches.
1441 * Set frame tx success limits according to legacy vs. high-throughput,
1442 * and reset overall (spanning all rates) tx success history statistics.
1443 * These control how long we stay using same modulation mode before
1444 * searching for a new mode.
1445 */
1446static void rs_set_stay_in_table(struct iwl_mvm *mvm, u8 is_legacy,
1447 struct iwl_lq_sta *lq_sta)
1448{
b3b06a32
ES		 1449 IWL_DEBUG_RATE(mvm, "Moving to RS_STATE_STAY_IN_COLUMN\n");
1450 lq_sta->rs_state = RS_STATE_STAY_IN_COLUMN;
8ca151b5 1451 if (is_legacy) {
834437da
ES		 1452 lq_sta->table_count_limit = IWL_MVM_RS_LEGACY_TABLE_COUNT;
1453 lq_sta->max_failure_limit = IWL_MVM_RS_LEGACY_FAILURE_LIMIT;
1454 lq_sta->max_success_limit = IWL_MVM_RS_LEGACY_SUCCESS_LIMIT;
8ca151b5 1455 } else {
834437da
ES		 1456 lq_sta->table_count_limit = IWL_MVM_RS_NON_LEGACY_TABLE_COUNT;
1457 lq_sta->max_failure_limit = IWL_MVM_RS_NON_LEGACY_FAILURE_LIMIT;
1458 lq_sta->max_success_limit = IWL_MVM_RS_NON_LEGACY_SUCCESS_LIMIT;
8ca151b5
JB		 1459 }
1460 lq_sta->table_count = 0;
1461 lq_sta->total_failed = 0;
1462 lq_sta->total_success = 0;
1463 lq_sta->flush_timer = jiffies;
b3b06a32 1464 lq_sta->visited_columns = 0;
8ca151b5
JB		 1465}
1466
6a028d9a
ES		 1467static inline int rs_get_max_rate_from_mask(unsigned long rate_mask)
1468{
1469 if (rate_mask)
1470 return find_last_bit(&rate_mask, BITS_PER_LONG);
1471 return IWL_RATE_INVALID;
1472}
1473
198266a3
ES		 1474static int rs_get_max_allowed_rate(struct iwl_lq_sta *lq_sta,
1475 const struct rs_tx_column *column)
1476{
1477 switch (column->mode) {
1478 case RS_LEGACY:
1479 return lq_sta->max_legacy_rate_idx;
1480 case RS_SISO:
1481 return lq_sta->max_siso_rate_idx;
1482 case RS_MIMO2:
1483 return lq_sta->max_mimo2_rate_idx;
1484 default:
1485 WARN_ON_ONCE(1);
1486 }
1487
1488 return lq_sta->max_legacy_rate_idx;
1489}
1490
a34529e8 1491static const u16 *rs_get_expected_tpt_table(struct iwl_lq_sta *lq_sta,
198266a3
ES		 1492 const struct rs_tx_column *column,
1493 u32 bw)
8ca151b5
JB		 1494{
1495 /* Used to choose among HT tables */
a34529e8 1496 const u16 (*ht_tbl_pointer)[IWL_RATE_COUNT];
8ca151b5 1497
b3b06a32
ES		 1498 if (WARN_ON_ONCE(column->mode != RS_LEGACY &&
1499 column->mode != RS_SISO &&
1500 column->mode != RS_MIMO2))
1501 return expected_tpt_legacy;
8ca151b5
JB		 1502
1503 /* Legacy rates have only one table */
b3b06a32
ES		 1504 if (column->mode == RS_LEGACY)
1505 return expected_tpt_legacy;
8ca151b5 1506
d310e405 1507 ht_tbl_pointer = expected_tpt_mimo2_20MHz;
8ca151b5 1508 /* Choose among many HT tables depending on number of streams
d310e405 1509 * (SISO/MIMO2), channel width (20/40/80), SGI, and aggregation
8ca151b5 1510 * status */
b3b06a32
ES		 1511 if (column->mode == RS_SISO) {
1512 switch (bw) {
d310e405
ES		 1513 case RATE_MCS_CHAN_WIDTH_20:
1514 ht_tbl_pointer = expected_tpt_siso_20MHz;
1515 break;
1516 case RATE_MCS_CHAN_WIDTH_40:
1517 ht_tbl_pointer = expected_tpt_siso_40MHz;
1518 break;
1519 case RATE_MCS_CHAN_WIDTH_80:
1520 ht_tbl_pointer = expected_tpt_siso_80MHz;
1521 break;
855f492f
GG		 1522 case RATE_MCS_CHAN_WIDTH_160:
1523 ht_tbl_pointer = expected_tpt_siso_160MHz;
1524 break;
d310e405
ES		 1525 default:
1526 WARN_ON_ONCE(1);
1527 }
b3b06a32
ES		 1528 } else if (column->mode == RS_MIMO2) {
1529 switch (bw) {
d310e405
ES		 1530 case RATE_MCS_CHAN_WIDTH_20:
1531 ht_tbl_pointer = expected_tpt_mimo2_20MHz;
1532 break;
1533 case RATE_MCS_CHAN_WIDTH_40:
1534 ht_tbl_pointer = expected_tpt_mimo2_40MHz;
1535 break;
1536 case RATE_MCS_CHAN_WIDTH_80:
1537 ht_tbl_pointer = expected_tpt_mimo2_80MHz;
1538 break;
855f492f
GG		 1539 case RATE_MCS_CHAN_WIDTH_160:
1540 ht_tbl_pointer = expected_tpt_mimo2_160MHz;
1541 break;
d310e405
ES		 1542 default:
1543 WARN_ON_ONCE(1);
1544 }
1545 } else {
1546 WARN_ON_ONCE(1);
d972ab31 1547 }
8ca151b5 1548
b3b06a32
ES		 1549 if (!column->sgi && !lq_sta->is_agg) /* Normal */
1550 return ht_tbl_pointer[0];
1551 else if (column->sgi && !lq_sta->is_agg) /* SGI */
1552 return ht_tbl_pointer[1];
1553 else if (!column->sgi && lq_sta->is_agg) /* AGG */
1554 return ht_tbl_pointer[2];
8ca151b5 1555 else /* AGG+SGI */
b3b06a32
ES		 1556 return ht_tbl_pointer[3];
1557}
1558
1559static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta,
1560 struct iwl_scale_tbl_info *tbl)
1561{
1562 struct rs_rate *rate = &tbl->rate;
1563 const struct rs_tx_column *column = &rs_tx_columns[tbl->column];
1564
1565 tbl->expected_tpt = rs_get_expected_tpt_table(lq_sta, column, rate->bw);
8ca151b5
JB		 1566}
1567
8ca151b5
JB		 1568static s32 rs_get_best_rate(struct iwl_mvm *mvm,
1569 struct iwl_lq_sta *lq_sta,
1570 struct iwl_scale_tbl_info *tbl, /* "search" */
80763515 1571 unsigned long rate_mask, s8 index)
8ca151b5 1572{
8ca151b5
JB		 1573 struct iwl_scale_tbl_info *active_tbl =
1574 &(lq_sta->lq_info[lq_sta->active_tbl]);
80763515
ES		 1575 s32 success_ratio = active_tbl->win[index].success_ratio;
1576 u16 expected_current_tpt = active_tbl->expected_tpt[index];
a34529e8 1577 const u16 *tpt_tbl = tbl->expected_tpt;
8ca151b5 1578 u16 high_low;
80763515
ES		 1579 u32 target_tpt;
1580 int rate_idx;
8ca151b5 1581
ed21a384 1582 if (success_ratio >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) {
80763515
ES		 1583 target_tpt = 100 * expected_current_tpt;
1584 IWL_DEBUG_RATE(mvm,
1585 "SR %d high. Find rate exceeding EXPECTED_CURRENT %d\n",
1586 success_ratio, target_tpt);
1587 } else {
1588 target_tpt = lq_sta->last_tpt;
1589 IWL_DEBUG_RATE(mvm,
ed21a384 1590 "SR %d not that good. Find rate exceeding ACTUAL_TPT %d\n",
80763515
ES		 1591 success_ratio, target_tpt);
1592 }
8ca151b5 1593
80763515 1594 rate_idx = find_first_bit(&rate_mask, BITS_PER_LONG);
8ca151b5 1595
80763515
ES		 1596 while (rate_idx != IWL_RATE_INVALID) {
1597 if (target_tpt < (100 * tpt_tbl[rate_idx]))
1598 break;
8ca151b5 1599
80763515
ES		 1600 high_low = rs_get_adjacent_rate(mvm, rate_idx, rate_mask,
1601 tbl->rate.type);
8ca151b5 1602
80763515 1603 rate_idx = (high_low >> 8) & 0xff;
8ca151b5
JB		 1604 }
1605
80763515
ES		 1606 IWL_DEBUG_RATE(mvm, "Best rate found %d target_tp %d expected_new %d\n",
1607 rate_idx, target_tpt,
1608 rate_idx != IWL_RATE_INVALID ?
1609 100 * tpt_tbl[rate_idx] : IWL_INVALID_VALUE);
1610
1611 return rate_idx;
8ca151b5
JB		 1612}
1613
5aa33553 1614static u32 rs_bw_from_sta_bw(struct ieee80211_sta *sta)
d310e405 1615{
855f492f
GG		 1616 switch (sta->bandwidth) {
1617 case IEEE80211_STA_RX_BW_160:
1618 return RATE_MCS_CHAN_WIDTH_160;
1619 case IEEE80211_STA_RX_BW_80:
5aa33553 1620 return RATE_MCS_CHAN_WIDTH_80;
855f492f 1621 case IEEE80211_STA_RX_BW_40:
5aa33553 1622 return RATE_MCS_CHAN_WIDTH_40;
855f492f
GG		 1623 case IEEE80211_STA_RX_BW_20:
1624 default:
1625 return RATE_MCS_CHAN_WIDTH_20;
1626 }
d310e405
ES		 1627}
1628
8ca151b5
JB		 1629/*
1630 * Check whether we should continue using same modulation mode, or
1631 * begin search for a new mode, based on:
1632 * 1) # tx successes or failures while using this mode
1633 * 2) # times calling this function
1634 * 3) elapsed time in this mode (not used, for now)
1635 */
1636static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search)
1637{
1638 struct iwl_scale_tbl_info *tbl;
8ca151b5
JB		 1639 int active_tbl;
1640 int flush_interval_passed = 0;
1641 struct iwl_mvm *mvm;
1642
ae969afe 1643 mvm = lq_sta->pers.drv;
8ca151b5
JB		 1644 active_tbl = lq_sta->active_tbl;
1645
1646 tbl = &(lq_sta->lq_info[active_tbl]);
1647
1648 /* If we've been disallowing search, see if we should now allow it */
b3b06a32 1649 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) {
8ca151b5
JB		 1650 /* Elapsed time using current modulation mode */
1651 if (lq_sta->flush_timer)
1652 flush_interval_passed =
1653 time_after(jiffies,
1654 (unsigned long)(lq_sta->flush_timer +
834437da 1655 (IWL_MVM_RS_STAY_IN_COLUMN_TIMEOUT * HZ)));
8ca151b5
JB		 1656
1657 /*
1658 * Check if we should allow search for new modulation mode.
1659 * If many frames have failed or succeeded, or we've used
1660 * this same modulation for a long time, allow search, and
1661 * reset history stats that keep track of whether we should
1662 * allow a new search. Also (below) reset all bitmaps and
1663 * stats in active history.
1664 */
1665 if (force_search ||
1666 (lq_sta->total_failed > lq_sta->max_failure_limit) ||
1667 (lq_sta->total_success > lq_sta->max_success_limit) ||
1668 ((!lq_sta->search_better_tbl) &&
1669 (lq_sta->flush_timer) && (flush_interval_passed))) {
1670 IWL_DEBUG_RATE(mvm,
1671 "LQ: stay is expired %d %d %d\n",
1672 lq_sta->total_failed,
1673 lq_sta->total_success,
1674 flush_interval_passed);
1675
1676 /* Allow search for new mode */
b3b06a32
ES		 1677 lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_STARTED;
1678 IWL_DEBUG_RATE(mvm,
1679 "Moving to RS_STATE_SEARCH_CYCLE_STARTED\n");
8ca151b5
JB		 1680 lq_sta->total_failed = 0;
1681 lq_sta->total_success = 0;
1682 lq_sta->flush_timer = 0;
b3b06a32
ES		 1683 /* mark the current column as visited */
1684 lq_sta->visited_columns = BIT(tbl->column);
8ca151b5
JB		 1685 /*
1686 * Else if we've used this modulation mode enough repetitions
1687 * (regardless of elapsed time or success/failure), reset
1688 * history bitmaps and rate-specific stats for all rates in
1689 * active table.
1690 */
1691 } else {
1692 lq_sta->table_count++;
1693 if (lq_sta->table_count >=
1694 lq_sta->table_count_limit) {
1695 lq_sta->table_count = 0;
1696
1697 IWL_DEBUG_RATE(mvm,
1698 "LQ: stay in table clear win\n");
b804eeb6 1699 rs_rate_scale_clear_tbl_windows(mvm, tbl);
8ca151b5
JB		 1700 }
1701 }
1702
1703 /* If transitioning to allow "search", reset all history
1704 * bitmaps and stats in active table (this will become the new
1705 * "search" table). */
b3b06a32 1706 if (lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED) {
b804eeb6 1707 rs_rate_scale_clear_tbl_windows(mvm, tbl);
8ca151b5
JB		 1708 }
1709 }
1710}
1711
04e3a5da
EG		 1712static void rs_set_amsdu_len(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1713 struct iwl_scale_tbl_info *tbl,
1714 enum rs_action scale_action)
1715{
7ccb498c 1716 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
04e3a5da
EG		 1717
1718 if ((!is_vht(&tbl->rate) && !is_ht(&tbl->rate)) ||
1719 tbl->rate.index < IWL_RATE_MCS_5_INDEX ||
1720 scale_action == RS_ACTION_DOWNSCALE)
7ccb498c 1721 mvmsta->tlc_amsdu = false;
04e3a5da 1722 else
7ccb498c 1723 mvmsta->tlc_amsdu = true;
04e3a5da
EG		 1724}
1725
8ca151b5
JB		 1726/*
1727 * setup rate table in uCode
1728 */
1729static void rs_update_rate_tbl(struct iwl_mvm *mvm,
9145d151 1730 struct ieee80211_sta *sta,
8ca151b5 1731 struct iwl_lq_sta *lq_sta,
7b9d74e4 1732 struct iwl_scale_tbl_info *tbl)
8ca151b5 1733{
7b9d74e4 1734 rs_fill_lq_cmd(mvm, sta, lq_sta, &tbl->rate);
9e680946 1735 iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false);
8ca151b5
JB		 1736}
1737
1191f646
ES		 1738static bool rs_tweak_rate_tbl(struct iwl_mvm *mvm,
1739 struct ieee80211_sta *sta,
1740 struct iwl_lq_sta *lq_sta,
1741 struct iwl_scale_tbl_info *tbl,
1742 enum rs_action scale_action)
1743{
1744 if (sta->bandwidth != IEEE80211_STA_RX_BW_80)
1745 return false;
1746
1747 if (!is_vht_siso(&tbl->rate))
1748 return false;
1749
1750 if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_80) &&
1751 (tbl->rate.index == IWL_RATE_MCS_0_INDEX) &&
1752 (scale_action == RS_ACTION_DOWNSCALE)) {
1753 tbl->rate.bw = RATE_MCS_CHAN_WIDTH_20;
1754 tbl->rate.index = IWL_RATE_MCS_4_INDEX;
1755 IWL_DEBUG_RATE(mvm, "Switch 80Mhz SISO MCS0 -> 20Mhz MCS4\n");
1756 goto tweaked;
1757 }
1758
1759 /* Go back to 80Mhz MCS1 only if we've established that 20Mhz MCS5 is
1760 * sustainable, i.e. we're past the test window. We can't go back
1761 * if MCS5 is just tested as this will happen always after switching
1762 * to 20Mhz MCS4 because the rate stats are cleared.
1763 */
1764 if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_20) &&
1765 (((tbl->rate.index == IWL_RATE_MCS_5_INDEX) &&
1766 (scale_action == RS_ACTION_STAY)) ||
1767 ((tbl->rate.index > IWL_RATE_MCS_5_INDEX) &&
1768 (scale_action == RS_ACTION_UPSCALE)))) {
1769 tbl->rate.bw = RATE_MCS_CHAN_WIDTH_80;
1770 tbl->rate.index = IWL_RATE_MCS_1_INDEX;
1771 IWL_DEBUG_RATE(mvm, "Switch 20Mhz SISO MCS5 -> 80Mhz MCS1\n");
1772 goto tweaked;
1773 }
1774
1775 return false;
1776
1777tweaked:
1778 rs_set_expected_tpt_table(lq_sta, tbl);
1779 rs_rate_scale_clear_tbl_windows(mvm, tbl);
1780 return true;
1781}
1782
b3b06a32
ES		 1783static enum rs_column rs_get_next_column(struct iwl_mvm *mvm,
1784 struct iwl_lq_sta *lq_sta,
1785 struct ieee80211_sta *sta,
1786 struct iwl_scale_tbl_info *tbl)
1787{
198266a3 1788 int i, j, max_rate;
b3b06a32
ES		 1789 enum rs_column next_col_id;
1790 const struct rs_tx_column *curr_col = &rs_tx_columns[tbl->column];
1791 const struct rs_tx_column *next_col;
1792 allow_column_func_t allow_func;
a0544272 1793 u8 valid_ants = iwl_mvm_get_valid_tx_ant(mvm);
a34529e8 1794 const u16 *expected_tpt_tbl;
198266a3 1795 u16 tpt, max_expected_tpt;
b3b06a32
ES		 1796
1797 for (i = 0; i < MAX_NEXT_COLUMNS; i++) {
1798 next_col_id = curr_col->next_columns[i];
1799
1800 if (next_col_id == RS_COLUMN_INVALID)
1801 continue;
1802
1803 if (lq_sta->visited_columns & BIT(next_col_id)) {
1804 IWL_DEBUG_RATE(mvm, "Skip already visited column %d\n",
1805 next_col_id);
1806 continue;
1807 }
1808
1809 next_col = &rs_tx_columns[next_col_id];
1810
1811 if (!rs_is_valid_ant(valid_ants, next_col->ant)) {
1812 IWL_DEBUG_RATE(mvm,
1813 "Skip column %d as ANT config isn't supported by chip. valid_ants 0x%x column ant 0x%x\n",
1814 next_col_id, valid_ants, next_col->ant);
1815 continue;
1816 }
1817
1818 for (j = 0; j < MAX_COLUMN_CHECKS; j++) {
1819 allow_func = next_col->checks[j];
bb8f44c9
ES		 1820 if (allow_func && !allow_func(mvm, sta, &tbl->rate,
1821 next_col))
b3b06a32
ES		 1822 break;
1823 }
1824
1825 if (j != MAX_COLUMN_CHECKS) {
1826 IWL_DEBUG_RATE(mvm,
1827 "Skip column %d: not allowed (check %d failed)\n",
1828 next_col_id, j);
1829
1830 continue;
1831 }
1832
1833 tpt = lq_sta->last_tpt / 100;
1834 expected_tpt_tbl = rs_get_expected_tpt_table(lq_sta, next_col,
049e0c33 1835 rs_bw_from_sta_bw(sta));
b3b06a32
ES		 1836 if (WARN_ON_ONCE(!expected_tpt_tbl))
1837 continue;
1838
198266a3 1839 max_rate = rs_get_max_allowed_rate(lq_sta, next_col);
6a028d9a
ES		 1840 if (max_rate == IWL_RATE_INVALID) {
1841 IWL_DEBUG_RATE(mvm,
1842 "Skip column %d: no rate is allowed in this column\n",
1843 next_col_id);
198266a3 1844 continue;
6a028d9a 1845 }
b3b06a32 1846
198266a3 1847 max_expected_tpt = expected_tpt_tbl[max_rate];
b3b06a32
ES		 1848 if (tpt >= max_expected_tpt) {
1849 IWL_DEBUG_RATE(mvm,
1850 "Skip column %d: can't beat current TPT. Max expected %d current %d\n",
1851 next_col_id, max_expected_tpt, tpt);
1852 continue;
1853 }
1854
198266a3
ES		 1855 IWL_DEBUG_RATE(mvm,
1856 "Found potential column %d. Max expected %d current %d\n",
1857 next_col_id, max_expected_tpt, tpt);
b3b06a32
ES		 1858 break;
1859 }
1860
1861 if (i == MAX_NEXT_COLUMNS)
1862 return RS_COLUMN_INVALID;
1863
b3b06a32
ES		 1864 return next_col_id;
1865}
1866
1867static int rs_switch_to_column(struct iwl_mvm *mvm,
1868 struct iwl_lq_sta *lq_sta,
1869 struct ieee80211_sta *sta,
1870 enum rs_column col_id)
1871{
1872 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
1873 struct iwl_scale_tbl_info *search_tbl =
1874 &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
1875 struct rs_rate *rate = &search_tbl->rate;
1876 const struct rs_tx_column *column = &rs_tx_columns[col_id];
1877 const struct rs_tx_column *curr_column = &rs_tx_columns[tbl->column];
80763515 1878 unsigned long rate_mask = 0;
b3b06a32
ES		 1879 u32 rate_idx = 0;
1880
992172e3 1881 memcpy(search_tbl, tbl, offsetof(struct iwl_scale_tbl_info, win));
b3b06a32
ES		 1882
1883 rate->sgi = column->sgi;
1884 rate->ant = column->ant;
1885
1886 if (column->mode == RS_LEGACY) {
57fbcce3 1887 if (lq_sta->band == NL80211_BAND_5GHZ)
b3b06a32
ES		 1888 rate->type = LQ_LEGACY_A;
1889 else
1890 rate->type = LQ_LEGACY_G;
1891
d8bafeaf
ES		 1892 rate->bw = RATE_MCS_CHAN_WIDTH_20;
1893 rate->ldpc = false;
b3b06a32
ES		 1894 rate_mask = lq_sta->active_legacy_rate;
1895 } else if (column->mode == RS_SISO) {
1896 rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO;
1897 rate_mask = lq_sta->active_siso_rate;
1898 } else if (column->mode == RS_MIMO2) {
1899 rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2;
1900 rate_mask = lq_sta->active_mimo2_rate;
1901 } else {
7281b164 1902 WARN_ONCE(1, "Bad column mode");
b3b06a32
ES		 1903 }
1904
d8bafeaf
ES		 1905 if (column->mode != RS_LEGACY) {
1906 rate->bw = rs_bw_from_sta_bw(sta);
1907 rate->ldpc = lq_sta->ldpc;
1908 }
1909
b3b06a32
ES		 1910 search_tbl->column = col_id;
1911 rs_set_expected_tpt_table(lq_sta, search_tbl);
1912
75d3e2d6
ES		 1913 lq_sta->visited_columns |= BIT(col_id);
1914
b3b06a32
ES		 1915 /* Get the best matching rate if we're changing modes. e.g.
1916 * SISO->MIMO, LEGACY->SISO, MIMO->SISO
1917 */
1918 if (curr_column->mode != column->mode) {
1919 rate_idx = rs_get_best_rate(mvm, lq_sta, search_tbl,
1920 rate_mask, rate->index);
1921
1922 if ((rate_idx == IWL_RATE_INVALID) ||
1923 !(BIT(rate_idx) & rate_mask)) {
1924 IWL_DEBUG_RATE(mvm,
1925 "can not switch with index %d"
80763515 1926 " rate mask %lx\n",
b3b06a32
ES		 1927 rate_idx, rate_mask);
1928
1929 goto err;
1930 }
1931
1932 rate->index = rate_idx;
1933 }
1934
b3b06a32
ES		 1935 IWL_DEBUG_RATE(mvm, "Switched to column %d: Index %d\n",
1936 col_id, rate->index);
1937
b3b06a32
ES		 1938 return 0;
1939
1940err:
1941 rate->type = LQ_NONE;
1942 return -1;
1943}
1944
4e4b815c
ES		 1945static enum rs_action rs_get_rate_action(struct iwl_mvm *mvm,
1946 struct iwl_scale_tbl_info *tbl,
1947 s32 sr, int low, int high,
1948 int current_tpt,
1949 int low_tpt, int high_tpt)
1950{
1951 enum rs_action action = RS_ACTION_STAY;
1952
834437da
ES		 1953 if ((sr <= RS_PERCENT(IWL_MVM_RS_SR_FORCE_DECREASE)) ||
1954 (current_tpt == 0)) {
4e4b815c 1955 IWL_DEBUG_RATE(mvm,
e53839eb
ES		 1956 "Decrease rate because of low SR\n");
1957 return RS_ACTION_DOWNSCALE;
4e4b815c
ES		 1958 }
1959
e53839eb
ES		 1960 if ((low_tpt == IWL_INVALID_VALUE) &&
1961 (high_tpt == IWL_INVALID_VALUE) &&
1962 (high != IWL_RATE_INVALID)) {
4e4b815c 1963 IWL_DEBUG_RATE(mvm,
e53839eb
ES		 1964 "No data about high/low rates. Increase rate\n");
1965 return RS_ACTION_UPSCALE;
4e4b815c
ES		 1966 }
1967
e53839eb
ES		 1968 if ((high_tpt == IWL_INVALID_VALUE) &&
1969 (high != IWL_RATE_INVALID) &&
1970 (low_tpt != IWL_INVALID_VALUE) &&
1971 (low_tpt < current_tpt)) {
1972 IWL_DEBUG_RATE(mvm,
1973 "No data about high rate and low rate is worse. Increase rate\n");
1974 return RS_ACTION_UPSCALE;
1975 }
4e4b815c 1976
e53839eb
ES		 1977 if ((high_tpt != IWL_INVALID_VALUE) &&
1978 (high_tpt > current_tpt)) {
1979 IWL_DEBUG_RATE(mvm,
1980 "Higher rate is better. Increate rate\n");
1981 return RS_ACTION_UPSCALE;
4e4b815c
ES		 1982 }
1983
e53839eb
ES		 1984 if ((low_tpt != IWL_INVALID_VALUE) &&
1985 (high_tpt != IWL_INVALID_VALUE) &&
1986 (low_tpt < current_tpt) &&
1987 (high_tpt < current_tpt)) {
4e4b815c 1988 IWL_DEBUG_RATE(mvm,
e53839eb
ES		 1989 "Both high and low are worse. Maintain rate\n");
1990 return RS_ACTION_STAY;
1991 }
1992
1993 if ((low_tpt != IWL_INVALID_VALUE) &&
1994 (low_tpt > current_tpt)) {
1995 IWL_DEBUG_RATE(mvm,
1996 "Lower rate is better\n");
1997 action = RS_ACTION_DOWNSCALE;
1998 goto out;
1999 }
2000
2001 if ((low_tpt == IWL_INVALID_VALUE) &&
2002 (low != IWL_RATE_INVALID)) {
4e4b815c 2003 IWL_DEBUG_RATE(mvm,
e53839eb
ES		 2004 "No data about lower rate\n");
2005 action = RS_ACTION_DOWNSCALE;
2006 goto out;
2007 }
2008
2009 IWL_DEBUG_RATE(mvm, "Maintain rate\n");
2010
2011out:
2012 if ((action == RS_ACTION_DOWNSCALE) && (low != IWL_RATE_INVALID)) {
834437da 2013 if (sr >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) {
e53839eb
ES		 2014 IWL_DEBUG_RATE(mvm,
2015 "SR is above NO DECREASE. Avoid downscale\n");
2016 action = RS_ACTION_STAY;
2017 } else if (current_tpt > (100 * tbl->expected_tpt[low])) {
2018 IWL_DEBUG_RATE(mvm,
2019 "Current TPT is higher than max expected in low rate. Avoid downscale\n");
2020 action = RS_ACTION_STAY;
2021 } else {
2022 IWL_DEBUG_RATE(mvm, "Decrease rate\n");
2023 }
4e4b815c
ES		 2024 }
2025
2026 return action;
2027}
b3b06a32 2028
d8bafeaf
ES		 2029static bool rs_stbc_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2030 struct iwl_lq_sta *lq_sta)
2031{
d8bafeaf
ES		 2032 /* Our chip supports Tx STBC and the peer is an HT/VHT STA which
2033 * supports STBC of at least 1*SS
2034 */
3d44eebf 2035 if (!lq_sta->stbc_capable)
d8bafeaf
ES		 2036 return false;
2037
d8bafeaf
ES		 2038 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))
2039 return false;
2040
2041 return true;
2042}
2043
2fd647f8
EP		 2044static void rs_get_adjacent_txp(struct iwl_mvm *mvm, int index,
2045 int *weaker, int *stronger)
2046{
834437da 2047 *weaker = index + IWL_MVM_RS_TPC_TX_POWER_STEP;
2fd647f8
EP		 2048 if (*weaker > TPC_MAX_REDUCTION)
2049 *weaker = TPC_INVALID;
2050
834437da 2051 *stronger = index - IWL_MVM_RS_TPC_TX_POWER_STEP;
2fd647f8
EP		 2052 if (*stronger < 0)
2053 *stronger = TPC_INVALID;
2054}
2055
1e9551de 2056static bool rs_tpc_allowed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
57fbcce3 2057 struct rs_rate *rate, enum nl80211_band band)
2fd647f8
EP		 2058{
2059 int index = rate->index;
1e9551de
ES		 2060 bool cam = (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM);
2061 bool sta_ps_disabled = (vif->type == NL80211_IFTYPE_STATION &&
2062 !vif->bss_conf.ps);
2fd647f8 2063
1e9551de
ES		 2064 IWL_DEBUG_RATE(mvm, "cam: %d sta_ps_disabled %d\n",
2065 cam, sta_ps_disabled);
2fd647f8
EP		 2066 /*
2067 * allow tpc only if power management is enabled, or bt coex
2068 * activity grade allows it and we are on 2.4Ghz.
2069 */
1e9551de 2070 if ((cam || sta_ps_disabled) &&
2fd647f8
EP		 2071 !iwl_mvm_bt_coex_is_tpc_allowed(mvm, band))
2072 return false;
2073
2074 IWL_DEBUG_RATE(mvm, "check rate, table type: %d\n", rate->type);
2075 if (is_legacy(rate))
2076 return index == IWL_RATE_54M_INDEX;
2077 if (is_ht(rate))
2078 return index == IWL_RATE_MCS_7_INDEX;
2079 if (is_vht(rate))
2080 return index == IWL_RATE_MCS_7_INDEX ||
2081 index == IWL_RATE_MCS_8_INDEX ||
2082 index == IWL_RATE_MCS_9_INDEX;
2083
2084 WARN_ON_ONCE(1);
2085 return false;
2086}
2087
2088enum tpc_action {
2089 TPC_ACTION_STAY,
2090 TPC_ACTION_DECREASE,
2091 TPC_ACTION_INCREASE,
2092 TPC_ACTION_NO_RESTIRCTION,
2093};
2094
2095static enum tpc_action rs_get_tpc_action(struct iwl_mvm *mvm,
2096 s32 sr, int weak, int strong,
2097 int current_tpt,
2098 int weak_tpt, int strong_tpt)
2099{
2100 /* stay until we have valid tpt */
2101 if (current_tpt == IWL_INVALID_VALUE) {
2102 IWL_DEBUG_RATE(mvm, "no current tpt. stay.\n");
2103 return TPC_ACTION_STAY;
2104 }
2105
2106 /* Too many failures, increase txp */
834437da
ES		 2107 if (sr <= RS_PERCENT(IWL_MVM_RS_TPC_SR_FORCE_INCREASE) ||
2108 current_tpt == 0) {
2fd647f8
EP		 2109 IWL_DEBUG_RATE(mvm, "increase txp because of weak SR\n");
2110 return TPC_ACTION_NO_RESTIRCTION;
2111 }
2112
2113 /* try decreasing first if applicable */
6ad6c01f
GG		 2114 if (sr >= RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) &&
2115 weak != TPC_INVALID) {
2fd647f8
EP		 2116 if (weak_tpt == IWL_INVALID_VALUE &&
2117 (strong_tpt == IWL_INVALID_VALUE ||
2118 current_tpt >= strong_tpt)) {
2119 IWL_DEBUG_RATE(mvm,
2120 "no weak txp measurement. decrease txp\n");
2121 return TPC_ACTION_DECREASE;
2122 }
2123
2124 if (weak_tpt > current_tpt) {
2125 IWL_DEBUG_RATE(mvm,
2126 "lower txp has better tpt. decrease txp\n");
2127 return TPC_ACTION_DECREASE;
2128 }
2129 }
2130
2131 /* next, increase if needed */
834437da
ES		 2132 if (sr < RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) &&
2133 strong != TPC_INVALID) {
2fd647f8
EP		 2134 if (weak_tpt == IWL_INVALID_VALUE &&
2135 strong_tpt != IWL_INVALID_VALUE &&
2136 current_tpt < strong_tpt) {
2137 IWL_DEBUG_RATE(mvm,
2138 "higher txp has better tpt. increase txp\n");
2139 return TPC_ACTION_INCREASE;
2140 }
2141
2142 if (weak_tpt < current_tpt &&
2143 (strong_tpt == IWL_INVALID_VALUE ||
2144 strong_tpt > current_tpt)) {
2145 IWL_DEBUG_RATE(mvm,
2146 "lower txp has worse tpt. increase txp\n");
2147 return TPC_ACTION_INCREASE;
2148 }
2149 }
2150
2151 IWL_DEBUG_RATE(mvm, "no need to increase or decrease txp - stay\n");
2152 return TPC_ACTION_STAY;
2153}
2154
2155static bool rs_tpc_perform(struct iwl_mvm *mvm,
2156 struct ieee80211_sta *sta,
2157 struct iwl_lq_sta *lq_sta,
2158 struct iwl_scale_tbl_info *tbl)
2159{
9d8ce6af 2160 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2fd647f8
EP		 2161 struct ieee80211_vif *vif = mvm_sta->vif;
2162 struct ieee80211_chanctx_conf *chanctx_conf;
57fbcce3 2163 enum nl80211_band band;
2fd647f8
EP		 2164 struct iwl_rate_scale_data *window;
2165 struct rs_rate *rate = &tbl->rate;
2166 enum tpc_action action;
2167 s32 sr;
2168 u8 cur = lq_sta->lq.reduced_tpc;
2169 int current_tpt;
2170 int weak, strong;
2171 int weak_tpt = IWL_INVALID_VALUE, strong_tpt = IWL_INVALID_VALUE;
2172
9a75b3df 2173#ifdef CONFIG_MAC80211_DEBUGFS
ae969afe 2174 if (lq_sta->pers.dbg_fixed_txp_reduction <= TPC_MAX_REDUCTION) {
3c6acb61 2175 IWL_DEBUG_RATE(mvm, "fixed tpc: %d\n",
ae969afe
EP		 2176 lq_sta->pers.dbg_fixed_txp_reduction);
2177 lq_sta->lq.reduced_tpc = lq_sta->pers.dbg_fixed_txp_reduction;
2178 return cur != lq_sta->pers.dbg_fixed_txp_reduction;
9a75b3df
EP		 2179 }
2180#endif
2181
2fd647f8
EP		 2182 rcu_read_lock();
2183 chanctx_conf = rcu_dereference(vif->chanctx_conf);
2184 if (WARN_ON(!chanctx_conf))
57fbcce3 2185 band = NUM_NL80211_BANDS;
2fd647f8
EP		 2186 else
2187 band = chanctx_conf->def.chan->band;
2188 rcu_read_unlock();
2189
1e9551de 2190 if (!rs_tpc_allowed(mvm, vif, rate, band)) {
2fd647f8 2191 IWL_DEBUG_RATE(mvm,
3c6acb61 2192 "tpc is not allowed. remove txp restrictions\n");
2fd647f8
EP		 2193 lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION;
2194 return cur != TPC_NO_REDUCTION;
2195 }
2196
2197 rs_get_adjacent_txp(mvm, cur, &weak, &strong);
2198
2199 /* Collect measured throughputs for current and adjacent rates */
2200 window = tbl->tpc_win;
2201 sr = window[cur].success_ratio;
2202 current_tpt = window[cur].average_tpt;
2203 if (weak != TPC_INVALID)
2204 weak_tpt = window[weak].average_tpt;
2205 if (strong != TPC_INVALID)
2206 strong_tpt = window[strong].average_tpt;
2207
2208 IWL_DEBUG_RATE(mvm,
2209 "(TPC: %d): cur_tpt %d SR %d weak %d strong %d weak_tpt %d strong_tpt %d\n",
2210 cur, current_tpt, sr, weak, strong,
2211 weak_tpt, strong_tpt);
2212
2213 action = rs_get_tpc_action(mvm, sr, weak, strong,
2214 current_tpt, weak_tpt, strong_tpt);
2215
2216 /* override actions if we are on the edge */
2217 if (weak == TPC_INVALID && action == TPC_ACTION_DECREASE) {
3c6acb61 2218 IWL_DEBUG_RATE(mvm, "already in lowest txp, stay\n");
2fd647f8
EP		 2219 action = TPC_ACTION_STAY;
2220 } else if (strong == TPC_INVALID &&
2221 (action == TPC_ACTION_INCREASE ||
2222 action == TPC_ACTION_NO_RESTIRCTION)) {
3c6acb61 2223 IWL_DEBUG_RATE(mvm, "already in highest txp, stay\n");
2fd647f8
EP		 2224 action = TPC_ACTION_STAY;
2225 }
2226
2227 switch (action) {
2228 case TPC_ACTION_DECREASE:
2229 lq_sta->lq.reduced_tpc = weak;
2230 return true;
2231 case TPC_ACTION_INCREASE:
2232 lq_sta->lq.reduced_tpc = strong;
2233 return true;
2234 case TPC_ACTION_NO_RESTIRCTION:
2235 lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION;
2236 return true;
2237 case TPC_ACTION_STAY:
2238 /* do nothing */
2239 break;
2240 }
2241 return false;
2242}
2243
8ca151b5
JB		 2244/*
2245 * Do rate scaling and search for new modulation mode.
2246 */
2247static void rs_rate_scale_perform(struct iwl_mvm *mvm,
8ca151b5 2248 struct ieee80211_sta *sta,
1ebc8f2e 2249 struct iwl_lq_sta *lq_sta,
ff7a68d0 2250 int tid, bool ndp)
8ca151b5 2251{
8ca151b5
JB		 2252 int low = IWL_RATE_INVALID;
2253 int high = IWL_RATE_INVALID;
2254 int index;
8ca151b5
JB		 2255 struct iwl_rate_scale_data *window = NULL;
2256 int current_tpt = IWL_INVALID_VALUE;
2257 int low_tpt = IWL_INVALID_VALUE;
2258 int high_tpt = IWL_INVALID_VALUE;
2259 u32 fail_count;
4e4b815c 2260 enum rs_action scale_action = RS_ACTION_STAY;
8ca151b5
JB		 2261 u16 rate_mask;
2262 u8 update_lq = 0;
2263 struct iwl_scale_tbl_info *tbl, *tbl1;
8ca151b5
JB		 2264 u8 active_tbl = 0;
2265 u8 done_search = 0;
2266 u16 high_low;
2267 s32 sr;
9d015a03 2268 u8 prev_agg = lq_sta->is_agg;
7ccb498c 2269 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
5aa33553 2270 struct rs_rate *rate;
8ca151b5 2271
7ccb498c 2272 lq_sta->is_agg = !!mvmsta->agg_tids;
8ca151b5
JB		 2273
2274 /*
2275 * Select rate-scale / modulation-mode table to work with in
2276 * the rest of this function: "search" if searching for better
2277 * modulation mode, or "active" if doing rate scaling within a mode.
2278 */
2279 if (!lq_sta->search_better_tbl)
2280 active_tbl = lq_sta->active_tbl;
2281 else
2282 active_tbl = 1 - lq_sta->active_tbl;
2283
2284 tbl = &(lq_sta->lq_info[active_tbl]);
5aa33553 2285 rate = &tbl->rate;
8ca151b5 2286
9d015a03
ES		 2287 if (prev_agg != lq_sta->is_agg) {
2288 IWL_DEBUG_RATE(mvm,
2289 "Aggregation changed: prev %d current %d. Update expected TPT table\n",
2290 prev_agg, lq_sta->is_agg);
2291 rs_set_expected_tpt_table(lq_sta, tbl);
b804eeb6 2292 rs_rate_scale_clear_tbl_windows(mvm, tbl);
9d015a03
ES		 2293 }
2294
8ca151b5 2295 /* current tx rate */
fcc5e851 2296 index = rate->index;
8ca151b5 2297
8ca151b5 2298 /* rates available for this association, and for modulation mode */
a8ff14f5 2299 rate_mask = rs_get_supported_rates(lq_sta, rate);
8ca151b5 2300
ca6f38ff 2301 if (!(BIT(index) & rate_mask)) {
8ca151b5
JB		 2302 IWL_ERR(mvm, "Current Rate is not valid\n");
2303 if (lq_sta->search_better_tbl) {
2304 /* revert to active table if search table is not valid*/
5aa33553 2305 rate->type = LQ_NONE;
8ca151b5
JB		 2306 lq_sta->search_better_tbl = 0;
2307 tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
7b9d74e4 2308 rs_update_rate_tbl(mvm, sta, lq_sta, tbl);
8ca151b5
JB		 2309 }
2310 return;
2311 }
2312
2313 /* Get expected throughput table and history window for current rate */
2314 if (!tbl->expected_tpt) {
2315 IWL_ERR(mvm, "tbl->expected_tpt is NULL\n");
2316 return;
2317 }
2318
2536e7c3 2319 /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */
8ca151b5
JB		 2320 window = &(tbl->win[index]);
2321
2322 /*
2323 * If there is not enough history to calculate actual average
2324 * throughput, keep analyzing results of more tx frames, without
2325 * changing rate or mode (bypass most of the rest of this function).
2326 * Set up new rate table in uCode only if old rate is not supported
2327 * in current association (use new rate found above).
2328 */
2329 fail_count = window->counter - window->success_counter;
834437da
ES		 2330 if ((fail_count < IWL_MVM_RS_RATE_MIN_FAILURE_TH) &&
2331 (window->success_counter < IWL_MVM_RS_RATE_MIN_SUCCESS_TH)) {
8ca151b5 2332 IWL_DEBUG_RATE(mvm,
cc60c6e9
ES		 2333 "%s: Test Window: succ %d total %d\n",
2334 rs_pretty_rate(rate),
2335 window->success_counter, window->counter);
8ca151b5
JB		 2336
2337 /* Can't calculate this yet; not enough history */
2338 window->average_tpt = IWL_INVALID_VALUE;
2339
2340 /* Should we stay with this modulation mode,
2341 * or search for a new one? */
2342 rs_stay_in_table(lq_sta, false);
2343
fcc5e851 2344 return;
8ca151b5 2345 }
8ca151b5
JB		 2346
2347 /* If we are searching for better modulation mode, check success. */
2348 if (lq_sta->search_better_tbl) {
2349 /* If good success, continue using the "search" mode;
2350 * no need to send new link quality command, since we're
2351 * continuing to use the setup that we've been trying. */
2352 if (window->average_tpt > lq_sta->last_tpt) {
2353 IWL_DEBUG_RATE(mvm,
4d30ee82
ES		 2354 "SWITCHING TO NEW TABLE SR: %d "
2355 "cur-tpt %d old-tpt %d\n",
8ca151b5
JB		 2356 window->success_ratio,
2357 window->average_tpt,
2358 lq_sta->last_tpt);
2359
8ca151b5
JB		 2360 /* Swap tables; "search" becomes "active" */
2361 lq_sta->active_tbl = active_tbl;
2362 current_tpt = window->average_tpt;
2363 /* Else poor success; go back to mode in "active" table */
2364 } else {
2365 IWL_DEBUG_RATE(mvm,
4d30ee82
ES		 2366 "GOING BACK TO THE OLD TABLE: SR %d "
2367 "cur-tpt %d old-tpt %d\n",
8ca151b5
JB		 2368 window->success_ratio,
2369 window->average_tpt,
2370 lq_sta->last_tpt);
2371
2372 /* Nullify "search" table */
5aa33553 2373 rate->type = LQ_NONE;
8ca151b5
JB		 2374
2375 /* Revert to "active" table */
2376 active_tbl = lq_sta->active_tbl;
2377 tbl = &(lq_sta->lq_info[active_tbl]);
2378
2379 /* Revert to "active" rate and throughput info */
8fc7c58c 2380 index = tbl->rate.index;
8ca151b5
JB		 2381 current_tpt = lq_sta->last_tpt;
2382
2383 /* Need to set up a new rate table in uCode */
2384 update_lq = 1;
2385 }
2386
2387 /* Either way, we've made a decision; modulation mode
2388 * search is done, allow rate adjustment next time. */
2389 lq_sta->search_better_tbl = 0;
2390 done_search = 1; /* Don't switch modes below! */
2391 goto lq_update;
2392 }
2393
2394 /* (Else) not in search of better modulation mode, try for better
2395 * starting rate, while staying in this mode. */
ca6f38ff 2396 high_low = rs_get_adjacent_rate(mvm, index, rate_mask, rate->type);
8ca151b5
JB		 2397 low = high_low & 0xff;
2398 high = (high_low >> 8) & 0xff;
2399
2536e7c3 2400 /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */
8ca151b5
JB		 2401
2402 sr = window->success_ratio;
2403
2404 /* Collect measured throughputs for current and adjacent rates */
2405 current_tpt = window->average_tpt;
2406 if (low != IWL_RATE_INVALID)
2407 low_tpt = tbl->win[low].average_tpt;
2408 if (high != IWL_RATE_INVALID)
2409 high_tpt = tbl->win[high].average_tpt;
2410
4d30ee82 2411 IWL_DEBUG_RATE(mvm,
cc60c6e9
ES		 2412 "%s: cur_tpt %d SR %d low %d high %d low_tpt %d high_tpt %d\n",
2413 rs_pretty_rate(rate), current_tpt, sr,
5aa33553 2414 low, high, low_tpt, high_tpt);
4d30ee82 2415
4e4b815c
ES		 2416 scale_action = rs_get_rate_action(mvm, tbl, sr, low, high,
2417 current_tpt, low_tpt, high_tpt);
8ca151b5 2418
393b9e5b 2419 /* Force a search in case BT doesn't like us being in MIMO */
5aa33553 2420 if (is_mimo(rate) &&
393b9e5b 2421 !iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) {
4d30ee82
ES		 2422 IWL_DEBUG_RATE(mvm,
2423 "BT Coex forbids MIMO. Search for new config\n");
36946ce6
EG		 2424 rs_stay_in_table(lq_sta, true);
2425 goto lq_update;
2426 }
2427
8ca151b5 2428 switch (scale_action) {
4e4b815c 2429 case RS_ACTION_DOWNSCALE:
8ca151b5
JB		 2430 /* Decrease starting rate, update uCode's rate table */
2431 if (low != IWL_RATE_INVALID) {
2432 update_lq = 1;
2433 index = low;
4d30ee82
ES		 2434 } else {
2435 IWL_DEBUG_RATE(mvm,
2436 "At the bottom rate. Can't decrease\n");
8ca151b5
JB		 2437 }
2438
2439 break;
4e4b815c 2440 case RS_ACTION_UPSCALE:
8ca151b5
JB		 2441 /* Increase starting rate, update uCode's rate table */
2442 if (high != IWL_RATE_INVALID) {
2443 update_lq = 1;
2444 index = high;
4d30ee82
ES		 2445 } else {
2446 IWL_DEBUG_RATE(mvm,
2447 "At the top rate. Can't increase\n");
8ca151b5
JB		 2448 }
2449
2450 break;
4e4b815c 2451 case RS_ACTION_STAY:
8ca151b5 2452 /* No change */
e6c8d602
ES		 2453 if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN)
2454 update_lq = rs_tpc_perform(mvm, sta, lq_sta, tbl);
2fd647f8 2455 break;
8ca151b5
JB		 2456 default:
2457 break;
2458 }
2459
8ca151b5
JB		 2460lq_update:
2461 /* Replace uCode's rate table for the destination station. */
5aa33553
ES		 2462 if (update_lq) {
2463 tbl->rate.index = index;
1191f646
ES		 2464 if (IWL_MVM_RS_80_20_FAR_RANGE_TWEAK)
2465 rs_tweak_rate_tbl(mvm, sta, lq_sta, tbl, scale_action);
04e3a5da 2466 rs_set_amsdu_len(mvm, sta, tbl, scale_action);
7b9d74e4 2467 rs_update_rate_tbl(mvm, sta, lq_sta, tbl);
5aa33553 2468 }
8ca151b5
JB		 2469
2470 rs_stay_in_table(lq_sta, false);
2471
2472 /*
2473 * Search for new modulation mode if we're:
2474 * 1) Not changing rates right now
2475 * 2) Not just finishing up a search
2476 * 3) Allowing a new search
2477 */
2478 if (!update_lq && !done_search &&
b3b06a32
ES		 2479 lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED
2480 && window->counter) {
2481 enum rs_column next_column;
2482
8ca151b5
JB		 2483 /* Save current throughput to compare with "search" throughput*/
2484 lq_sta->last_tpt = current_tpt;
2485
4d30ee82 2486 IWL_DEBUG_RATE(mvm,
b3b06a32
ES		 2487 "Start Search: update_lq %d done_search %d rs_state %d win->counter %d\n",
2488 update_lq, done_search, lq_sta->rs_state,
4d30ee82 2489 window->counter);
b3b06a32
ES		 2490
2491 next_column = rs_get_next_column(mvm, lq_sta, sta, tbl);
2492 if (next_column != RS_COLUMN_INVALID) {
2493 int ret = rs_switch_to_column(mvm, lq_sta, sta,
2494 next_column);
2495 if (!ret)
2496 lq_sta->search_better_tbl = 1;
2497 } else {
2498 IWL_DEBUG_RATE(mvm,
2499 "No more columns to explore in search cycle. Go to RS_STATE_SEARCH_CYCLE_ENDED\n");
2500 lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_ENDED;
2501 }
8ca151b5
JB		 2502
2503 /* If new "search" mode was selected, set up in uCode table */
2504 if (lq_sta->search_better_tbl) {
2505 /* Access the "search" table, clear its history. */
2506 tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
b804eeb6 2507 rs_rate_scale_clear_tbl_windows(mvm, tbl);
8ca151b5
JB		 2508
2509 /* Use new "search" start rate */
8fc7c58c 2510 index = tbl->rate.index;
8ca151b5 2511
b3b06a32
ES		 2512 rs_dump_rate(mvm, &tbl->rate,
2513 "Switch to SEARCH TABLE:");
7b9d74e4 2514 rs_update_rate_tbl(mvm, sta, lq_sta, tbl);
8ca151b5
JB		 2515 } else {
2516 done_search = 1;
2517 }
2518 }
2519
482e4844
GG		 2520 if (!ndp)
2521 rs_tl_turn_on_agg(mvm, mvmsta, tid, lq_sta, sta);
2522
b3b06a32 2523 if (done_search && lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_ENDED) {
8ca151b5 2524 tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]);
482e4844 2525 rs_set_stay_in_table(mvm, is_legacy(&tbl1->rate), lq_sta);
8ca151b5 2526 }
8ca151b5
JB		 2527}
2528
361dbec8
ES		 2529struct rs_init_rate_info {
2530 s8 rssi;
2531 u8 rate_idx;
2532};
2533
b503ed60 2534static const struct rs_init_rate_info rs_optimal_rates_24ghz_legacy[] = {
361dbec8
ES		 2535 { -60, IWL_RATE_54M_INDEX },
2536 { -64, IWL_RATE_48M_INDEX },
2537 { -68, IWL_RATE_36M_INDEX },
2538 { -80, IWL_RATE_24M_INDEX },
2539 { -84, IWL_RATE_18M_INDEX },
2540 { -85, IWL_RATE_12M_INDEX },
2541 { -86, IWL_RATE_11M_INDEX },
2542 { -88, IWL_RATE_5M_INDEX },
2543 { -90, IWL_RATE_2M_INDEX },
2544 { S8_MIN, IWL_RATE_1M_INDEX },
2545};
2546
b503ed60 2547static const struct rs_init_rate_info rs_optimal_rates_5ghz_legacy[] = {
361dbec8
ES		 2548 { -60, IWL_RATE_54M_INDEX },
2549 { -64, IWL_RATE_48M_INDEX },
2550 { -72, IWL_RATE_36M_INDEX },
2551 { -80, IWL_RATE_24M_INDEX },
2552 { -84, IWL_RATE_18M_INDEX },
2553 { -85, IWL_RATE_12M_INDEX },
2554 { -87, IWL_RATE_9M_INDEX },
2555 { S8_MIN, IWL_RATE_6M_INDEX },
2556};
2557
b503ed60
ES		 2558static const struct rs_init_rate_info rs_optimal_rates_ht[] = {
2559 { -60, IWL_RATE_MCS_7_INDEX },
2560 { -64, IWL_RATE_MCS_6_INDEX },
2561 { -68, IWL_RATE_MCS_5_INDEX },
2562 { -72, IWL_RATE_MCS_4_INDEX },
2563 { -80, IWL_RATE_MCS_3_INDEX },
2564 { -84, IWL_RATE_MCS_2_INDEX },
2565 { -85, IWL_RATE_MCS_1_INDEX },
2566 { S8_MIN, IWL_RATE_MCS_0_INDEX},
2567};
2568
855f492f
GG		 2569/* MCS index 9 is not valid for 20MHz VHT channel width,
2570 * but is ok for 40, 80 and 160MHz channels.
2571 */
b503ed60
ES		 2572static const struct rs_init_rate_info rs_optimal_rates_vht_20mhz[] = {
2573 { -60, IWL_RATE_MCS_8_INDEX },
2574 { -64, IWL_RATE_MCS_7_INDEX },
2575 { -68, IWL_RATE_MCS_6_INDEX },
2576 { -72, IWL_RATE_MCS_5_INDEX },
2577 { -80, IWL_RATE_MCS_4_INDEX },
2578 { -84, IWL_RATE_MCS_3_INDEX },
2579 { -85, IWL_RATE_MCS_2_INDEX },
2580 { -87, IWL_RATE_MCS_1_INDEX },
2581 { S8_MIN, IWL_RATE_MCS_0_INDEX},
2582};
2583
855f492f 2584static const struct rs_init_rate_info rs_optimal_rates_vht[] = {
b503ed60
ES		 2585 { -60, IWL_RATE_MCS_9_INDEX },
2586 { -64, IWL_RATE_MCS_8_INDEX },
2587 { -68, IWL_RATE_MCS_7_INDEX },
2588 { -72, IWL_RATE_MCS_6_INDEX },
2589 { -80, IWL_RATE_MCS_5_INDEX },
2590 { -84, IWL_RATE_MCS_4_INDEX },
2591 { -85, IWL_RATE_MCS_3_INDEX },
2592 { -87, IWL_RATE_MCS_2_INDEX },
2593 { -88, IWL_RATE_MCS_1_INDEX },
2594 { S8_MIN, IWL_RATE_MCS_0_INDEX },
2595};
2596
99319b8c
GG		 2597#define IWL_RS_LOW_RSSI_THRESHOLD (-76) /* dBm */
2598
b503ed60
ES		 2599/* Init the optimal rate based on STA caps
2600 * This combined with rssi is used to report the last tx rate
2601 * to userspace when we haven't transmitted enough frames.
2602 */
2603static void rs_init_optimal_rate(struct iwl_mvm *mvm,
2604 struct ieee80211_sta *sta,
2605 struct iwl_lq_sta *lq_sta)
2606{
2607 struct rs_rate *rate = &lq_sta->optimal_rate;
2608
2609 if (lq_sta->max_mimo2_rate_idx != IWL_RATE_INVALID)
2610 rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2;
2611 else if (lq_sta->max_siso_rate_idx != IWL_RATE_INVALID)
2612 rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO;
57fbcce3 2613 else if (lq_sta->band == NL80211_BAND_5GHZ)
b503ed60
ES		 2614 rate->type = LQ_LEGACY_A;
2615 else
2616 rate->type = LQ_LEGACY_G;
2617
2618 rate->bw = rs_bw_from_sta_bw(sta);
2619 rate->sgi = rs_sgi_allow(mvm, sta, rate, NULL);
2620
2621 /* ANT/LDPC/STBC aren't relevant for the rate reported to userspace */
2622
2623 if (is_mimo(rate)) {
2624 lq_sta->optimal_rate_mask = lq_sta->active_mimo2_rate;
2625 } else if (is_siso(rate)) {
2626 lq_sta->optimal_rate_mask = lq_sta->active_siso_rate;
2627 } else {
2628 lq_sta->optimal_rate_mask = lq_sta->active_legacy_rate;
2629
57fbcce3 2630 if (lq_sta->band == NL80211_BAND_5GHZ) {
b503ed60
ES		 2631 lq_sta->optimal_rates = rs_optimal_rates_5ghz_legacy;
2632 lq_sta->optimal_nentries =
2633 ARRAY_SIZE(rs_optimal_rates_5ghz_legacy);
2634 } else {
2635 lq_sta->optimal_rates = rs_optimal_rates_24ghz_legacy;
2636 lq_sta->optimal_nentries =
2637 ARRAY_SIZE(rs_optimal_rates_24ghz_legacy);
2638 }
2639 }
2640
2641 if (is_vht(rate)) {
2642 if (rate->bw == RATE_MCS_CHAN_WIDTH_20) {
2643 lq_sta->optimal_rates = rs_optimal_rates_vht_20mhz;
2644 lq_sta->optimal_nentries =
2645 ARRAY_SIZE(rs_optimal_rates_vht_20mhz);
2646 } else {
855f492f 2647 lq_sta->optimal_rates = rs_optimal_rates_vht;
b503ed60 2648 lq_sta->optimal_nentries =
855f492f 2649 ARRAY_SIZE(rs_optimal_rates_vht);
b503ed60
ES		 2650 }
2651 } else if (is_ht(rate)) {
2652 lq_sta->optimal_rates = rs_optimal_rates_ht;
2653 lq_sta->optimal_nentries = ARRAY_SIZE(rs_optimal_rates_ht);
2654 }
2655}
2656
2657/* Compute the optimal rate index based on RSSI */
2658static struct rs_rate *rs_get_optimal_rate(struct iwl_mvm *mvm,
2659 struct iwl_lq_sta *lq_sta)
2660{
2661 struct rs_rate *rate = &lq_sta->optimal_rate;
2662 int i;
2663
2664 rate->index = find_first_bit(&lq_sta->optimal_rate_mask,
2665 BITS_PER_LONG);
2666
2667 for (i = 0; i < lq_sta->optimal_nentries; i++) {
2668 int rate_idx = lq_sta->optimal_rates[i].rate_idx;
2669
2670 if ((lq_sta->pers.last_rssi >= lq_sta->optimal_rates[i].rssi) &&
2671 (BIT(rate_idx) & lq_sta->optimal_rate_mask)) {
2672 rate->index = rate_idx;
2673 break;
2674 }
2675 }
2676
b503ed60
ES		 2677 return rate;
2678}
2679
361dbec8
ES		 2680/* Choose an initial legacy rate and antenna to use based on the RSSI
2681 * of last Rx
2682 */
2683static void rs_get_initial_rate(struct iwl_mvm *mvm,
99319b8c 2684 struct ieee80211_sta *sta,
361dbec8 2685 struct iwl_lq_sta *lq_sta,
57fbcce3 2686 enum nl80211_band band,
6b7a5aea
NG		 2687 struct rs_rate *rate,
2688 bool init)
361dbec8
ES		 2689{
2690 int i, nentries;
99319b8c 2691 unsigned long active_rate;
361dbec8
ES		 2692 s8 best_rssi = S8_MIN;
2693 u8 best_ant = ANT_NONE;
a0544272 2694 u8 valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm);
361dbec8
ES		 2695 const struct rs_init_rate_info *initial_rates;
2696
2697 for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) {
2698 if (!(lq_sta->pers.chains & BIT(i)))
2699 continue;
2700
2701 if (lq_sta->pers.chain_signal[i] > best_rssi) {
2702 best_rssi = lq_sta->pers.chain_signal[i];
2703 best_ant = BIT(i);
2704 }
2705 }
2706
2707 IWL_DEBUG_RATE(mvm, "Best ANT: %s Best RSSI: %d\n",
2708 rs_pretty_ant(best_ant), best_rssi);
2709
2710 if (best_ant != ANT_A && best_ant != ANT_B)
2711 rate->ant = first_antenna(valid_tx_ant);
2712 else
2713 rate->ant = best_ant;
2714
2715 rate->sgi = false;
2716 rate->ldpc = false;
2717 rate->bw = RATE_MCS_CHAN_WIDTH_20;
2718
2719 rate->index = find_first_bit(&lq_sta->active_legacy_rate,
2720 BITS_PER_LONG);
2721
57fbcce3 2722 if (band == NL80211_BAND_5GHZ) {
361dbec8 2723 rate->type = LQ_LEGACY_A;
b503ed60
ES		 2724 initial_rates = rs_optimal_rates_5ghz_legacy;
2725 nentries = ARRAY_SIZE(rs_optimal_rates_5ghz_legacy);
361dbec8
ES		 2726 } else {
2727 rate->type = LQ_LEGACY_G;
b503ed60
ES		 2728 initial_rates = rs_optimal_rates_24ghz_legacy;
2729 nentries = ARRAY_SIZE(rs_optimal_rates_24ghz_legacy);
361dbec8
ES		 2730 }
2731
99319b8c
GG		 2732 if (!IWL_MVM_RS_RSSI_BASED_INIT_RATE)
2733 goto out;
2734
2735 /* Start from a higher rate if the corresponding debug capability
2736 * is enabled. The rate is chosen according to AP capabilities.
2737 * In case of VHT/HT when the rssi is low fallback to the case of
2738 * legacy rates.
2739 */
2740 if (sta->vht_cap.vht_supported &&
2741 best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) {
6b7a5aea
NG		 2742 /*
2743 * In AP mode, when a new station associates, rs is initialized
2744 * immediately upon association completion, before the phy
2745 * context is updated with the association parameters, so the
2746 * sta bandwidth might be wider than the phy context allows.
2747 * To avoid this issue, always initialize rs with 20mhz
2748 * bandwidth rate, and after authorization, when the phy context
2749 * is already up-to-date, re-init rs with the correct bw.
2750 */
2751 u32 bw = init ? RATE_MCS_CHAN_WIDTH_20 : rs_bw_from_sta_bw(sta);
2752
2753 switch (bw) {
2754 case RATE_MCS_CHAN_WIDTH_40:
2755 case RATE_MCS_CHAN_WIDTH_80:
2756 case RATE_MCS_CHAN_WIDTH_160:
855f492f
GG		 2757 initial_rates = rs_optimal_rates_vht;
2758 nentries = ARRAY_SIZE(rs_optimal_rates_vht);
2759 break;
6b7a5aea 2760 case RATE_MCS_CHAN_WIDTH_20:
99319b8c
GG		 2761 initial_rates = rs_optimal_rates_vht_20mhz;
2762 nentries = ARRAY_SIZE(rs_optimal_rates_vht_20mhz);
855f492f
GG		 2763 break;
2764 default:
99319b8c
GG		 2765 IWL_ERR(mvm, "Invalid BW %d\n", sta->bandwidth);
2766 goto out;
361dbec8 2767 }
855f492f 2768
99319b8c
GG		 2769 active_rate = lq_sta->active_siso_rate;
2770 rate->type = LQ_VHT_SISO;
6b7a5aea 2771 rate->bw = bw;
99319b8c
GG		 2772 } else if (sta->ht_cap.ht_supported &&
2773 best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) {
2774 initial_rates = rs_optimal_rates_ht;
2775 nentries = ARRAY_SIZE(rs_optimal_rates_ht);
2776 active_rate = lq_sta->active_siso_rate;
2777 rate->type = LQ_HT_SISO;
2778 } else {
2779 active_rate = lq_sta->active_legacy_rate;
361dbec8
ES		 2780 }
2781
99319b8c
GG		 2782 for (i = 0; i < nentries; i++) {
2783 int rate_idx = initial_rates[i].rate_idx;
2784
2785 if ((best_rssi >= initial_rates[i].rssi) &&
2786 (BIT(rate_idx) & active_rate)) {
2787 rate->index = rate_idx;
2788 break;
2789 }
2790 }
2791
2792out:
2793 rs_dump_rate(mvm, rate, "INITIAL");
361dbec8
ES		 2794}
2795
2796/* Save info about RSSI of last Rx */
2797void rs_update_last_rssi(struct iwl_mvm *mvm,
ecaf71de 2798 struct iwl_mvm_sta *mvmsta,
361dbec8
ES		 2799 struct ieee80211_rx_status *rx_status)
2800{
ecaf71de 2801 struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv;
b503ed60
ES		 2802 int i;
2803
361dbec8
ES		 2804 lq_sta->pers.chains = rx_status->chains;
2805 lq_sta->pers.chain_signal[0] = rx_status->chain_signal[0];
2806 lq_sta->pers.chain_signal[1] = rx_status->chain_signal[1];
2807 lq_sta->pers.chain_signal[2] = rx_status->chain_signal[2];
b503ed60
ES		 2808 lq_sta->pers.last_rssi = S8_MIN;
2809
2810 for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) {
2811 if (!(lq_sta->pers.chains & BIT(i)))
2812 continue;
2813
2814 if (lq_sta->pers.chain_signal[i] > lq_sta->pers.last_rssi)
2815 lq_sta->pers.last_rssi = lq_sta->pers.chain_signal[i];
2816 }
361dbec8
ES		 2817}
2818
8ca151b5
JB		 2819/**
2820 * rs_initialize_lq - Initialize a station's hardware rate table
2821 *
2822 * The uCode's station table contains a table of fallback rates
2823 * for automatic fallback during transmission.
2824 *
2825 * NOTE: This sets up a default set of values. These will be replaced later
2826 * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of
2827 * rc80211_simple.
2828 *
2829 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
2830 * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
2831 * which requires station table entry to exist).
2832 */
2833static void rs_initialize_lq(struct iwl_mvm *mvm,
2834 struct ieee80211_sta *sta,
2835 struct iwl_lq_sta *lq_sta,
57fbcce3 2836 enum nl80211_band band,
b87c2179 2837 bool init)
8ca151b5
JB		 2838{
2839 struct iwl_scale_tbl_info *tbl;
5aa33553 2840 struct rs_rate *rate;
8ca151b5 2841 u8 active_tbl = 0;
8ca151b5
JB		 2842
2843 if (!sta || !lq_sta)
2844 return;
2845
8ca151b5
JB		 2846 if (!lq_sta->search_better_tbl)
2847 active_tbl = lq_sta->active_tbl;
2848 else
2849 active_tbl = 1 - lq_sta->active_tbl;
2850
2851 tbl = &(lq_sta->lq_info[active_tbl]);
5aa33553 2852 rate = &tbl->rate;
8ca151b5 2853
6b7a5aea 2854 rs_get_initial_rate(mvm, sta, lq_sta, band, rate, init);
b503ed60 2855 rs_init_optimal_rate(mvm, sta, lq_sta);
8ca151b5 2856
8f6438f7
GG		 2857 WARN_ONCE(rate->ant != ANT_A && rate->ant != ANT_B,
2858 "ant: 0x%x, chains 0x%x, fw tx ant: 0x%x, nvm tx ant: 0x%x\n",
2859 rate->ant, lq_sta->pers.chains, mvm->fw->valid_tx_ant,
2860 mvm->nvm_data ? mvm->nvm_data->valid_tx_ant : ANT_INVALID);
2861
99319b8c 2862 tbl->column = rs_get_column_from_rate(rate);
b3b06a32 2863
8ca151b5 2864 rs_set_expected_tpt_table(lq_sta, tbl);
80e9e5cd 2865 rs_fill_lq_cmd(mvm, sta, lq_sta, rate);
8ca151b5 2866 /* TODO restore station should remember the lq cmd */
b87c2179 2867 iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, init);
8ca151b5
JB		 2868}
2869
9f66a397
GG		 2870static void rs_drv_get_rate(void *mvm_r, struct ieee80211_sta *sta,
2871 void *mvm_sta,
2872 struct ieee80211_tx_rate_control *txrc)
8ca151b5 2873{
ecaf71de 2874 struct iwl_op_mode *op_mode = mvm_r;
8ca151b5 2875 struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
ecaf71de 2876 struct sk_buff *skb = txrc->skb;
8ca151b5 2877 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
ecaf71de 2878 struct iwl_lq_sta *lq_sta;
b503ed60
ES		 2879 struct rs_rate *optimal_rate;
2880 u32 last_ucode_rate;
8ca151b5 2881
dcbc17ad
JB		 2882 if (sta && !iwl_mvm_sta_from_mac80211(sta)->vif) {
2883 /* if vif isn't initialized mvm doesn't know about
2884 * this station, so don't do anything with the it
2885 */
2886 sta = NULL;
2887 mvm_sta = NULL;
2888 }
2889
8ca151b5
JB		 2890 /* Send management frames and NO_ACK data using lowest rate. */
2891 if (rate_control_send_low(sta, mvm_sta, txrc))
2892 return;
2893
ecaf71de
GG		 2894 if (!mvm_sta)
2895 return;
2896
2897 lq_sta = mvm_sta;
d310e405
ES		 2898 iwl_mvm_hwrate_to_tx_rate(lq_sta->last_rate_n_flags,
2899 info->band, &info->control.rates[0]);
622ebe99 2900 info->control.rates[0].count = 1;
b503ed60
ES		 2901
2902 /* Report the optimal rate based on rssi and STA caps if we haven't
2903 * converged yet (too little traffic) or exploring other modulations
2904 */
2905 if (lq_sta->rs_state != RS_STATE_STAY_IN_COLUMN) {
2906 optimal_rate = rs_get_optimal_rate(mvm, lq_sta);
2907 last_ucode_rate = ucode_rate_from_rs_rate(mvm,
2908 optimal_rate);
2909 iwl_mvm_hwrate_to_tx_rate(last_ucode_rate, info->band,
2910 &txrc->reported_rate);
2911 }
8ca151b5
JB		 2912}
2913
9f66a397
GG		 2914static void *rs_drv_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,
2915 gfp_t gfp)
8ca151b5 2916{
7ccb498c 2917 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
ae969afe
EP		 2918 struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_rate;
2919 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
ecaf71de 2920 struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv;
8ca151b5
JB		 2921
2922 IWL_DEBUG_RATE(mvm, "create station rate scale window\n");
2923
ae969afe
EP		 2924 lq_sta->pers.drv = mvm;
2925#ifdef CONFIG_MAC80211_DEBUGFS
2926 lq_sta->pers.dbg_fixed_rate = 0;
2927 lq_sta->pers.dbg_fixed_txp_reduction = TPC_INVALID;
878985ce 2928 lq_sta->pers.ss_force = RS_SS_FORCE_NONE;
ae969afe 2929#endif
361dbec8
ES		 2930 lq_sta->pers.chains = 0;
2931 memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal));
b503ed60 2932 lq_sta->pers.last_rssi = S8_MIN;
ae969afe 2933
ecaf71de 2934 return lq_sta;
8ca151b5
JB		 2935}
2936
d310e405
ES		 2937static int rs_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap *vht_cap,
2938 int nss)
2939{
2940 u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) &
2941 (0x3 << (2 * (nss - 1)));
2942 rx_mcs >>= (2 * (nss - 1));
2943
2944 if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_7)
2945 return IWL_RATE_MCS_7_INDEX;
2946 else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_8)
2947 return IWL_RATE_MCS_8_INDEX;
2948 else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_9)
2949 return IWL_RATE_MCS_9_INDEX;
2950
2951 WARN_ON_ONCE(rx_mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED);
2952 return -1;
2953}
2954
750a1b45
ES		 2955static void rs_vht_set_enabled_rates(struct ieee80211_sta *sta,
2956 struct ieee80211_sta_vht_cap *vht_cap,
2957 struct iwl_lq_sta *lq_sta)
2958{
2959 int i;
2960 int highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 1);
2961
2962 if (highest_mcs >= IWL_RATE_MCS_0_INDEX) {
2963 for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) {
2964 if (i == IWL_RATE_9M_INDEX)
2965 continue;
2966
271518ad
ES		 2967 /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */
2968 if (i == IWL_RATE_MCS_9_INDEX &&
2969 sta->bandwidth == IEEE80211_STA_RX_BW_20)
2970 continue;
2971
750a1b45
ES		 2972 lq_sta->active_siso_rate |= BIT(i);
2973 }
2974 }
2975
ecc90e79
ES		 2976 if (sta->rx_nss < 2)
2977 return;
2978
750a1b45
ES		 2979 highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 2);
2980 if (highest_mcs >= IWL_RATE_MCS_0_INDEX) {
2981 for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) {
2982 if (i == IWL_RATE_9M_INDEX)
2983 continue;
2984
271518ad
ES		 2985 /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */
2986 if (i == IWL_RATE_MCS_9_INDEX &&
2987 sta->bandwidth == IEEE80211_STA_RX_BW_20)
2988 continue;
2989
750a1b45
ES		 2990 lq_sta->active_mimo2_rate |= BIT(i);
2991 }
2992 }
2993}
2994
2f15a829
JB		 2995static void rs_ht_init(struct iwl_mvm *mvm,
2996 struct ieee80211_sta *sta,
2997 struct iwl_lq_sta *lq_sta,
2998 struct ieee80211_sta_ht_cap *ht_cap)
2999{
3000 /* active_siso_rate mask includes 9 MBits (bit 5),
3001 * and CCK (bits 0-3), supp_rates[] does not;
3002 * shift to convert format, force 9 MBits off.
3003 */
3004 lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1;
3005 lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1;
3006 lq_sta->active_siso_rate &= ~((u16)0x2);
3007 lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE;
3008
3009 lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1;
3010 lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1;
3011 lq_sta->active_mimo2_rate &= ~((u16)0x2);
3012 lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE;
3013
3014 if (mvm->cfg->ht_params->ldpc &&
3015 (ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING))
3016 lq_sta->ldpc = true;
3017
3018 if (mvm->cfg->ht_params->stbc &&
3019 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
3020 (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC))
3d44eebf 3021 lq_sta->stbc_capable = true;
2f15a829
JB		 3022
3023 lq_sta->is_vht = false;
3024}
3025
3026static void rs_vht_init(struct iwl_mvm *mvm,
3027 struct ieee80211_sta *sta,
3028 struct iwl_lq_sta *lq_sta,
3029 struct ieee80211_sta_vht_cap *vht_cap)
3030{
3031 rs_vht_set_enabled_rates(sta, vht_cap, lq_sta);
3032
3033 if (mvm->cfg->ht_params->ldpc &&
3034 (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC))
3035 lq_sta->ldpc = true;
3036
3037 if (mvm->cfg->ht_params->stbc &&
3038 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
3039 (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK))
3d44eebf
ES		 3040 lq_sta->stbc_capable = true;
3041
859d914c 3042 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
3d44eebf
ES		 3043 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
3044 (vht_cap->cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE))
3045 lq_sta->bfer_capable = true;
2f15a829
JB		 3046
3047 lq_sta->is_vht = true;
3048}
3049
5fc0f76c 3050#ifdef CONFIG_IWLWIFI_DEBUGFS
9f66a397 3051void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm)
5fc0f76c
ES		 3052{
3053 spin_lock_bh(&mvm->drv_stats_lock);
2f15a829 3054 memset(&mvm->drv_rx_stats, 0, sizeof(mvm->drv_rx_stats));
5fc0f76c
ES		 3055 spin_unlock_bh(&mvm->drv_stats_lock);
3056}
3057
2f15a829 3058void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm, u32 rate, bool agg)
5fc0f76c 3059{
9d504435 3060 u8 nss = 0;
5fc0f76c
ES		 3061
3062 spin_lock(&mvm->drv_stats_lock);
3063
3064 if (agg)
2f15a829 3065 mvm->drv_rx_stats.agg_frames++;
5fc0f76c 3066
2f15a829 3067 mvm->drv_rx_stats.success_frames++;
5fc0f76c
ES		 3068
3069 switch (rate & RATE_MCS_CHAN_WIDTH_MSK) {
3070 case RATE_MCS_CHAN_WIDTH_20:
2f15a829 3071 mvm->drv_rx_stats.bw_20_frames++;
5fc0f76c
ES		 3072 break;
3073 case RATE_MCS_CHAN_WIDTH_40:
2f15a829 3074 mvm->drv_rx_stats.bw_40_frames++;
5fc0f76c
ES		 3075 break;
3076 case RATE_MCS_CHAN_WIDTH_80:
2f15a829 3077 mvm->drv_rx_stats.bw_80_frames++;
5fc0f76c 3078 break;
855f492f
GG		 3079 case RATE_MCS_CHAN_WIDTH_160:
3080 mvm->drv_rx_stats.bw_160_frames++;
3081 break;
5fc0f76c
ES		 3082 default:
3083 WARN_ONCE(1, "bad BW. rate 0x%x", rate);
3084 }
3085
3086 if (rate & RATE_MCS_HT_MSK) {
2f15a829 3087 mvm->drv_rx_stats.ht_frames++;
5fc0f76c
ES		 3088 nss = ((rate & RATE_HT_MCS_NSS_MSK) >> RATE_HT_MCS_NSS_POS) + 1;
3089 } else if (rate & RATE_MCS_VHT_MSK) {
2f15a829 3090 mvm->drv_rx_stats.vht_frames++;
5fc0f76c
ES		 3091 nss = ((rate & RATE_VHT_MCS_NSS_MSK) >>
3092 RATE_VHT_MCS_NSS_POS) + 1;
3093 } else {
2f15a829 3094 mvm->drv_rx_stats.legacy_frames++;
5fc0f76c
ES		 3095 }
3096
3097 if (nss == 1)
2f15a829 3098 mvm->drv_rx_stats.siso_frames++;
5fc0f76c 3099 else if (nss == 2)
2f15a829 3100 mvm->drv_rx_stats.mimo2_frames++;
5fc0f76c
ES		 3101
3102 if (rate & RATE_MCS_SGI_MSK)
2f15a829 3103 mvm->drv_rx_stats.sgi_frames++;
5fc0f76c 3104 else
2f15a829 3105 mvm->drv_rx_stats.ngi_frames++;
5fc0f76c 3106
2f15a829
JB		 3107 mvm->drv_rx_stats.last_rates[mvm->drv_rx_stats.last_frame_idx] = rate;
3108 mvm->drv_rx_stats.last_frame_idx =
3109 (mvm->drv_rx_stats.last_frame_idx + 1) %
3110 ARRAY_SIZE(mvm->drv_rx_stats.last_rates);
5fc0f76c
ES		 3111
3112 spin_unlock(&mvm->drv_stats_lock);
3113}
3114#endif
3115
8ca151b5
JB		 3116/*
3117 * Called after adding a new station to initialize rate scaling
3118 */
9f66a397
GG		 3119static void rs_drv_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
3120 enum nl80211_band band, bool init)
8ca151b5
JB		 3121{
3122 int i, j;
3123 struct ieee80211_hw *hw = mvm->hw;
3124 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
d310e405 3125 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
7ccb498c 3126 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
ecaf71de 3127 struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta.rs_drv;
8ca151b5
JB		 3128 struct ieee80211_supported_band *sband;
3129 unsigned long supp; /* must be unsigned long for for_each_set_bit */
3130
ae969afe
EP		 3131 /* clear all non-persistent lq data */
3132 memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers));
b87c2179 3133
8ca151b5
JB		 3134 sband = hw->wiphy->bands[band];
3135
7ccb498c
LC		 3136 lq_sta->lq.sta_id = mvmsta->sta_id;
3137 mvmsta->tlc_amsdu = false;
8ca151b5
JB		 3138
3139 for (j = 0; j < LQ_SIZE; j++)
b804eeb6 3140 rs_rate_scale_clear_tbl_windows(mvm, &lq_sta->lq_info[j]);
8ca151b5
JB		 3141
3142 lq_sta->flush_timer = 0;
87d5e415 3143 lq_sta->last_tx = jiffies;
8ca151b5
JB		 3144
3145 IWL_DEBUG_RATE(mvm,
3146 "LQ: *** rate scale station global init for station %d ***\n",
7ccb498c 3147 mvmsta->sta_id);
8ca151b5
JB		 3148 /* TODO: what is a good starting rate for STA? About middle? Maybe not
3149 * the lowest or the highest rate.. Could consider using RSSI from
3150 * previous packets? Need to have IEEE 802.1X auth succeed immediately
3151 * after assoc.. */
3152
834437da 3153 lq_sta->missed_rate_counter = IWL_MVM_RS_MISSED_RATE_MAX;
8ca151b5
JB		 3154 lq_sta->band = sband->band;
3155 /*
3156 * active legacy rates as per supported rates bitmap
3157 */
3158 supp = sta->supp_rates[sband->band];
3159 lq_sta->active_legacy_rate = 0;
3160 for_each_set_bit(i, &supp, BITS_PER_LONG)
3161 lq_sta->active_legacy_rate |= BIT(sband->bitrates[i].hw_value);
3162
d310e405 3163 /* TODO: should probably account for rx_highest for both HT/VHT */
2c59d80c
ES		 3164 if (!vht_cap || !vht_cap->vht_supported)
3165 rs_ht_init(mvm, sta, lq_sta, ht_cap);
3166 else
3167 rs_vht_init(mvm, sta, lq_sta, vht_cap);
8ca151b5 3168
6a028d9a
ES		 3169 lq_sta->max_legacy_rate_idx =
3170 rs_get_max_rate_from_mask(lq_sta->active_legacy_rate);
3171 lq_sta->max_siso_rate_idx =
3172 rs_get_max_rate_from_mask(lq_sta->active_siso_rate);
3173 lq_sta->max_mimo2_rate_idx =
3174 rs_get_max_rate_from_mask(lq_sta->active_mimo2_rate);
198266a3 3175
a3576ff2 3176 IWL_DEBUG_RATE(mvm,
3d44eebf 3177 "LEGACY=%lX SISO=%lX MIMO2=%lX VHT=%d LDPC=%d STBC=%d BFER=%d\n",
198266a3 3178 lq_sta->active_legacy_rate,
8ca151b5 3179 lq_sta->active_siso_rate,
d310e405 3180 lq_sta->active_mimo2_rate,
3d44eebf
ES		 3181 lq_sta->is_vht, lq_sta->ldpc, lq_sta->stbc_capable,
3182 lq_sta->bfer_capable);
198266a3
ES		 3183 IWL_DEBUG_RATE(mvm, "MAX RATE: LEGACY=%d SISO=%d MIMO2=%d\n",
3184 lq_sta->max_legacy_rate_idx,
3185 lq_sta->max_siso_rate_idx,
3186 lq_sta->max_mimo2_rate_idx);
8ca151b5
JB		 3187
3188 /* These values will be overridden later */
3189 lq_sta->lq.single_stream_ant_msk =
a0544272 3190 first_antenna(iwl_mvm_get_valid_tx_ant(mvm));
809bccfa 3191 lq_sta->lq.dual_stream_ant_msk = ANT_AB;
8ca151b5
JB		 3192
3193 /* as default allow aggregation for all tids */
3194 lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID;
8ca151b5 3195 lq_sta->is_agg = 0;
5fc0f76c 3196#ifdef CONFIG_IWLWIFI_DEBUGFS
2f15a829 3197 iwl_mvm_reset_frame_stats(mvm);
5fc0f76c 3198#endif
b87c2179
ES		 3199 rs_initialize_lq(mvm, sta, lq_sta, band, init);
3200}
3201
9f66a397
GG		 3202static void rs_drv_rate_update(void *mvm_r,
3203 struct ieee80211_supported_band *sband,
3204 struct cfg80211_chan_def *chandef,
3205 struct ieee80211_sta *sta,
3206 void *priv_sta, u32 changed)
b87c2179 3207{
9f66a397
GG		 3208 struct iwl_op_mode *op_mode = mvm_r;
3209 struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
b87c2179 3210 u8 tid;
b87c2179 3211
dcbc17ad
JB		 3212 if (!iwl_mvm_sta_from_mac80211(sta)->vif)
3213 return;
3214
b87c2179
ES		 3215 /* Stop any ongoing aggregations as rs starts off assuming no agg */
3216 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
3217 ieee80211_stop_tx_ba_session(sta, tid);
3218
3219 iwl_mvm_rs_rate_init(mvm, sta, sband->band, false);
8ca151b5
JB		 3220}
3221
8fc7c58c
ES		 3222#ifdef CONFIG_MAC80211_DEBUGFS
3223static void rs_build_rates_table_from_fixed(struct iwl_mvm *mvm,
3224 struct iwl_lq_cmd *lq_cmd,
57fbcce3 3225 enum nl80211_band band,
8fc7c58c
ES		 3226 u32 ucode_rate)
3227{
3228 struct rs_rate rate;
3229 int i;
3230 int num_rates = ARRAY_SIZE(lq_cmd->rs_table);
3231 __le32 ucode_rate_le32 = cpu_to_le32(ucode_rate);
7ceb98a3 3232 u8 ant = (ucode_rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS;
8fc7c58c
ES		 3233
3234 for (i = 0; i < num_rates; i++)
3235 lq_cmd->rs_table[i] = ucode_rate_le32;
3236
3237 rs_rate_from_ucode_rate(ucode_rate, band, &rate);
3238
3239 if (is_mimo(&rate))
3240 lq_cmd->mimo_delim = num_rates - 1;
3241 else
3242 lq_cmd->mimo_delim = 0;
7ceb98a3
EG		 3243
3244 lq_cmd->reduced_tpc = 0;
3245
3246 if (num_of_ant(ant) == 1)
3247 lq_cmd->single_stream_ant_msk = ant;
3248
a58bb468
LK		 3249 if (!mvm->trans->cfg->gen2)
3250 lq_cmd->agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
3251 else
3252 lq_cmd->agg_frame_cnt_limit =
3253 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
8fc7c58c
ES		 3254}
3255#endif /* CONFIG_MAC80211_DEBUGFS */
3256
e07be6d3
ES		 3257static void rs_fill_rates_for_column(struct iwl_mvm *mvm,
3258 struct iwl_lq_sta *lq_sta,
3259 struct rs_rate *rate,
3260 __le32 *rs_table, int *rs_table_index,
3261 int num_rates, int num_retries,
3262 u8 valid_tx_ant, bool toggle_ant)
3263{
3264 int i, j;
3265 __le32 ucode_rate;
3266 bool bottom_reached = false;
3267 int prev_rate_idx = rate->index;
3268 int end = LINK_QUAL_MAX_RETRY_NUM;
3269 int index = *rs_table_index;
3270
3271 for (i = 0; i < num_rates && index < end; i++) {
bd999318
ES		 3272 for (j = 0; j < num_retries && index < end; j++, index++) {
3273 ucode_rate = cpu_to_le32(ucode_rate_from_rs_rate(mvm,
3274 rate));
e07be6d3 3275 rs_table[index] = ucode_rate;
bd999318
ES		 3276 if (toggle_ant)
3277 rs_toggle_antenna(valid_tx_ant, rate);
3278 }
e07be6d3
ES		 3279
3280 prev_rate_idx = rate->index;
3281 bottom_reached = rs_get_lower_rate_in_column(lq_sta, rate);
3282 if (bottom_reached && !is_legacy(rate))
3283 break;
3284 }
3285
bd999318 3286 if (!bottom_reached && !is_legacy(rate))
e07be6d3
ES		 3287 rate->index = prev_rate_idx;
3288
3289 *rs_table_index = index;
3290}
3291
3292/* Building the rate table is non trivial. When we're in MIMO2/VHT/80Mhz/SGI
3293 * column the rate table should look like this:
3294 *
3295 * rate[0] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI
3296 * rate[1] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI
3297 * rate[2] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI
3298 * rate[3] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI
3299 * rate[4] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI
3300 * rate[5] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI
3301 * rate[6] 0x4005007 VHT | ANT: A BW: 80Mhz MCS: 7 NSS: 1 NGI
3302 * rate[7] 0x4009006 VHT | ANT: B BW: 80Mhz MCS: 6 NSS: 1 NGI
3303 * rate[8] 0x4005005 VHT | ANT: A BW: 80Mhz MCS: 5 NSS: 1 NGI
3304 * rate[9] 0x800B Legacy | ANT: B Rate: 36 Mbps
3305 * rate[10] 0x4009 Legacy | ANT: A Rate: 24 Mbps
3306 * rate[11] 0x8007 Legacy | ANT: B Rate: 18 Mbps
3307 * rate[12] 0x4005 Legacy | ANT: A Rate: 12 Mbps
3308 * rate[13] 0x800F Legacy | ANT: B Rate: 9 Mbps
3309 * rate[14] 0x400D Legacy | ANT: A Rate: 6 Mbps
3310 * rate[15] 0x800D Legacy | ANT: B Rate: 6 Mbps
3311 */
8fc7c58c 3312static void rs_build_rates_table(struct iwl_mvm *mvm,
d8bafeaf 3313 struct ieee80211_sta *sta,
8fc7c58c
ES		 3314 struct iwl_lq_sta *lq_sta,
3315 const struct rs_rate *initial_rate)
8ca151b5 3316{
5aa33553 3317 struct rs_rate rate;
e07be6d3 3318 int num_rates, num_retries, index = 0;
8ca151b5
JB		 3319 u8 valid_tx_ant = 0;
3320 struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;
e07be6d3 3321 bool toggle_ant = false;
ea42d1cb 3322 u32 color;
8ca151b5 3323
9e898f1b 3324 memcpy(&rate, initial_rate, sizeof(rate));
8fc7c58c 3325
a0544272 3326 valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm);
c5d679a5 3327
3d44eebf 3328 /* TODO: remove old API when min FW API hits 14 */
859d914c 3329 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS) &&
3d44eebf
ES		 3330 rs_stbc_allow(mvm, sta, lq_sta))
3331 rate.stbc = true;
8ca151b5 3332
e07be6d3 3333 if (is_siso(&rate)) {
834437da
ES		 3334 num_rates = IWL_MVM_RS_INITIAL_SISO_NUM_RATES;
3335 num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE;
e07be6d3 3336 } else if (is_mimo(&rate)) {
834437da
ES		 3337 num_rates = IWL_MVM_RS_INITIAL_MIMO_NUM_RATES;
3338 num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE;
8ca151b5 3339 } else {
834437da 3340 num_rates = IWL_MVM_RS_INITIAL_LEGACY_NUM_RATES;
bd999318 3341 num_retries = IWL_MVM_RS_INITIAL_LEGACY_RETRIES;
e07be6d3 3342 toggle_ant = true;
8ca151b5
JB		 3343 }
3344
e07be6d3
ES		 3345 rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,
3346 num_rates, num_retries, valid_tx_ant,
3347 toggle_ant);
8ca151b5 3348
e07be6d3 3349 rs_get_lower_rate_down_column(lq_sta, &rate);
8ca151b5 3350
e07be6d3 3351 if (is_siso(&rate)) {
834437da
ES		 3352 num_rates = IWL_MVM_RS_SECONDARY_SISO_NUM_RATES;
3353 num_retries = IWL_MVM_RS_SECONDARY_SISO_RETRIES;
d9088f60 3354 lq_cmd->mimo_delim = index;
e07be6d3 3355 } else if (is_legacy(&rate)) {
834437da 3356 num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES;
bd999318 3357 num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES;
e07be6d3
ES		 3358 } else {
3359 WARN_ON_ONCE(1);
3360 }
8ca151b5 3361
e07be6d3 3362 toggle_ant = true;
8ca151b5 3363
e07be6d3
ES		 3364 rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,
3365 num_rates, num_retries, valid_tx_ant,
3366 toggle_ant);
8ca151b5 3367
e07be6d3 3368 rs_get_lower_rate_down_column(lq_sta, &rate);
8ca151b5 3369
834437da 3370 num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES;
bd999318 3371 num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES;
8ca151b5 3372
e07be6d3
ES		 3373 rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index,
3374 num_rates, num_retries, valid_tx_ant,
3375 toggle_ant);
8ca151b5 3376
ea42d1cb
GG		 3377 /* update the color of the LQ command (as a counter at bits 1-3) */
3378 color = LQ_FLAGS_COLOR_INC(LQ_FLAG_COLOR_GET(lq_cmd->flags));
3379 lq_cmd->flags = LQ_FLAG_COLOR_SET(lq_cmd->flags, color);
8fc7c58c
ES		 3380}
3381
3d44eebf
ES		 3382struct rs_bfer_active_iter_data {
3383 struct ieee80211_sta *exclude_sta;
3384 struct iwl_mvm_sta *bfer_mvmsta;
3385};
3386
3387static void rs_bfer_active_iter(void *_data,
3388 struct ieee80211_sta *sta)
3389{
3390 struct rs_bfer_active_iter_data *data = _data;
3391 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
ecaf71de 3392 struct iwl_lq_cmd *lq_cmd = &mvmsta->lq_sta.rs_drv.lq;
3d44eebf
ES		 3393 u32 ss_params = le32_to_cpu(lq_cmd->ss_params);
3394
3395 if (sta == data->exclude_sta)
3396 return;
3397
3398 /* The current sta has BFER allowed */
3399 if (ss_params & LQ_SS_BFER_ALLOWED) {
3400 WARN_ON_ONCE(data->bfer_mvmsta != NULL);
3401
3402 data->bfer_mvmsta = mvmsta;
3403 }
3404}
3405
3406static int rs_bfer_priority(struct iwl_mvm_sta *sta)
3407{
3408 int prio = -1;
3409 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(sta->vif);
3410
3411 switch (viftype) {
3412 case NL80211_IFTYPE_AP:
3413 case NL80211_IFTYPE_P2P_GO:
3414 prio = 3;
3415 break;
3416 case NL80211_IFTYPE_P2P_CLIENT:
3417 prio = 2;
3418 break;
3419 case NL80211_IFTYPE_STATION:
3420 prio = 1;
3421 break;
3422 default:
3423 WARN_ONCE(true, "viftype %d sta_id %d", viftype, sta->sta_id);
3424 prio = -1;
3425 }
3426
3427 return prio;
3428}
3429
3430/* Returns >0 if sta1 has a higher BFER priority compared to sta2 */
3431static int rs_bfer_priority_cmp(struct iwl_mvm_sta *sta1,
3432 struct iwl_mvm_sta *sta2)
3433{
3434 int prio1 = rs_bfer_priority(sta1);
3435 int prio2 = rs_bfer_priority(sta2);
3436
3437 if (prio1 > prio2)
3438 return 1;
3439 if (prio1 < prio2)
3440 return -1;
3441 return 0;
3442}
3443
3444static void rs_set_lq_ss_params(struct iwl_mvm *mvm,
3445 struct ieee80211_sta *sta,
3446 struct iwl_lq_sta *lq_sta,
3447 const struct rs_rate *initial_rate)
3448{
3449 struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;
3450 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3451 struct rs_bfer_active_iter_data data = {
3452 .exclude_sta = sta,
3453 .bfer_mvmsta = NULL,
3454 };
3455 struct iwl_mvm_sta *bfer_mvmsta = NULL;
3456 u32 ss_params = LQ_SS_PARAMS_VALID;
3457
3458 if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta))
3459 goto out;
3460
878985ce 3461#ifdef CONFIG_MAC80211_DEBUGFS
1e9c62fa
ES		 3462 /* Check if forcing the decision is configured.
3463 * Note that SISO is forced by not allowing STBC or BFER
3464 */
878985ce 3465 if (lq_sta->pers.ss_force == RS_SS_FORCE_STBC)
1e9c62fa 3466 ss_params |= (LQ_SS_STBC_1SS_ALLOWED | LQ_SS_FORCE);
878985ce 3467 else if (lq_sta->pers.ss_force == RS_SS_FORCE_BFER)
1e9c62fa
ES		 3468 ss_params |= (LQ_SS_BFER_ALLOWED | LQ_SS_FORCE);
3469
878985ce 3470 if (lq_sta->pers.ss_force != RS_SS_FORCE_NONE) {
1e9c62fa 3471 IWL_DEBUG_RATE(mvm, "Forcing single stream Tx decision %d\n",
878985ce 3472 lq_sta->pers.ss_force);
1e9c62fa
ES		 3473 goto out;
3474 }
878985ce 3475#endif
1e9c62fa 3476
3d44eebf
ES		 3477 if (lq_sta->stbc_capable)
3478 ss_params |= LQ_SS_STBC_1SS_ALLOWED;
3479
3480 if (!lq_sta->bfer_capable)
3481 goto out;
3482
3483 ieee80211_iterate_stations_atomic(mvm->hw,
3484 rs_bfer_active_iter,
3485 &data);
3486 bfer_mvmsta = data.bfer_mvmsta;
3487
3488 /* This code is safe as it doesn't run concurrently for different
3489 * stations. This is guaranteed by the fact that calls to
3490 * ieee80211_tx_status wouldn't run concurrently for a single HW.
3491 */
3492 if (!bfer_mvmsta) {
3493 IWL_DEBUG_RATE(mvm, "No sta with BFER allowed found. Allow\n");
3494
3495 ss_params |= LQ_SS_BFER_ALLOWED;
3496 goto out;
3497 }
3498
3499 IWL_DEBUG_RATE(mvm, "Found existing sta %d with BFER activated\n",
3500 bfer_mvmsta->sta_id);
3501
3502 /* Disallow BFER on another STA if active and we're a higher priority */
3503 if (rs_bfer_priority_cmp(mvmsta, bfer_mvmsta) > 0) {
ecaf71de
GG		 3504 struct iwl_lq_cmd *bfersta_lq_cmd =
3505 &bfer_mvmsta->lq_sta.rs_drv.lq;
3d44eebf
ES		 3506 u32 bfersta_ss_params = le32_to_cpu(bfersta_lq_cmd->ss_params);
3507
3508 bfersta_ss_params &= ~LQ_SS_BFER_ALLOWED;
3509 bfersta_lq_cmd->ss_params = cpu_to_le32(bfersta_ss_params);
3510 iwl_mvm_send_lq_cmd(mvm, bfersta_lq_cmd, false);
3511
3512 ss_params |= LQ_SS_BFER_ALLOWED;
3513 IWL_DEBUG_RATE(mvm,
3514 "Lower priority BFER sta found (%d). Switch BFER\n",
3515 bfer_mvmsta->sta_id);
3516 }
3517out:
3518 lq_cmd->ss_params = cpu_to_le32(ss_params);
3519}
3520
8fc7c58c
ES		 3521static void rs_fill_lq_cmd(struct iwl_mvm *mvm,
3522 struct ieee80211_sta *sta,
3523 struct iwl_lq_sta *lq_sta,
3524 const struct rs_rate *initial_rate)
3525{
3526 struct iwl_lq_cmd *lq_cmd = &lq_sta->lq;
7ceb98a3
EG		 3527 struct iwl_mvm_sta *mvmsta;
3528 struct iwl_mvm_vif *mvmvif;
3529
834437da 3530 lq_cmd->agg_disable_start_th = IWL_MVM_RS_AGG_DISABLE_START;
7ceb98a3 3531 lq_cmd->agg_time_limit =
834437da 3532 cpu_to_le16(IWL_MVM_RS_AGG_TIME_LIMIT);
8fc7c58c
ES		 3533
3534#ifdef CONFIG_MAC80211_DEBUGFS
ae969afe 3535 if (lq_sta->pers.dbg_fixed_rate) {
8fc7c58c
ES		 3536 rs_build_rates_table_from_fixed(mvm, lq_cmd,
3537 lq_sta->band,
ae969afe 3538 lq_sta->pers.dbg_fixed_rate);
7ceb98a3
EG		 3539 return;
3540 }
8fc7c58c 3541#endif
7ceb98a3
EG		 3542 if (WARN_ON_ONCE(!sta || !initial_rate))
3543 return;
8fc7c58c 3544
d8bafeaf 3545 rs_build_rates_table(mvm, sta, lq_sta, initial_rate);
8ca151b5 3546
859d914c 3547 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS))
3d44eebf
ES		 3548 rs_set_lq_ss_params(mvm, sta, lq_sta, initial_rate);
3549
7ceb98a3
EG		 3550 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3551 mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
e96d551f 3552
7ceb98a3
EG		 3553 if (num_of_ant(initial_rate->ant) == 1)
3554 lq_cmd->single_stream_ant_msk = initial_rate->ant;
3555
3556 lq_cmd->agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
3557
3558 /*
0d365ae5 3559 * In case of low latency, tell the firmware to leave a frame in the
7ceb98a3
EG		 3560 * Tx Fifo so that it can start a transaction in the same TxOP. This
3561 * basically allows the firmware to send bursts.
3562 */
1412ee39 3563 if (iwl_mvm_vif_low_latency(mvmvif))
7ceb98a3
EG		 3564 lq_cmd->agg_frame_cnt_limit--;
3565
a4db848f
EG		 3566 if (mvmsta->vif->p2p)
3567 lq_cmd->flags |= LQ_FLAG_USE_RTS_MSK;
3568
7ceb98a3 3569 lq_cmd->agg_time_limit =
5b7ff615 3570 cpu_to_le16(iwl_mvm_coex_agg_time_limit(mvm, sta));
8ca151b5
JB		 3571}
3572
3573static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
3574{
3575 return hw->priv;
3576}
9f66a397 3577
8ca151b5
JB		 3578/* rate scale requires free function to be implemented */
3579static void rs_free(void *mvm_rate)
3580{
3581 return;
3582}
3583
9f66a397 3584static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta)
8ca151b5
JB		 3585{
3586 struct iwl_op_mode *op_mode __maybe_unused = mvm_r;
3587 struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
3588
3589 IWL_DEBUG_RATE(mvm, "enter\n");
3590 IWL_DEBUG_RATE(mvm, "leave\n");
3591}
3592
3593#ifdef CONFIG_MAC80211_DEBUGFS
f6f046f0 3594int rs_pretty_print_rate(char *buf, int bufsz, const u32 rate)
5aa33553
ES		 3595{
3596
1a61b347
ES		 3597 char *type, *bw;
3598 u8 mcs = 0, nss = 0;
3599 u8 ant = (rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS;
3600
3601 if (!(rate & RATE_MCS_HT_MSK) &&
3602 !(rate & RATE_MCS_VHT_MSK)) {
3603 int index = iwl_hwrate_to_plcp_idx(rate);
3604
f6f046f0
GG		 3605 return scnprintf(buf, bufsz, "Legacy | ANT: %s Rate: %s Mbps\n",
3606 rs_pretty_ant(ant),
3607 index == IWL_RATE_INVALID ? "BAD" :
3608 iwl_rate_mcs[index].mbps);
1a61b347
ES		 3609 }
3610
3611 if (rate & RATE_MCS_VHT_MSK) {
3612 type = "VHT";
3613 mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK;
3614 nss = ((rate & RATE_VHT_MCS_NSS_MSK)
3615 >> RATE_VHT_MCS_NSS_POS) + 1;
3616 } else if (rate & RATE_MCS_HT_MSK) {
3617 type = "HT";
3618 mcs = rate & RATE_HT_MCS_INDEX_MSK;
3374c3ab
GG		 3619 nss = ((rate & RATE_HT_MCS_NSS_MSK)
3620 >> RATE_HT_MCS_NSS_POS) + 1;
1a61b347
ES		 3621 } else {
3622 type = "Unknown"; /* shouldn't happen */
3623 }
3624
3625 switch (rate & RATE_MCS_CHAN_WIDTH_MSK) {
3626 case RATE_MCS_CHAN_WIDTH_20:
3627 bw = "20Mhz";
3628 break;
3629 case RATE_MCS_CHAN_WIDTH_40:
3630 bw = "40Mhz";
3631 break;
3632 case RATE_MCS_CHAN_WIDTH_80:
3633 bw = "80Mhz";
3634 break;
3635 case RATE_MCS_CHAN_WIDTH_160:
3636 bw = "160Mhz";
3637 break;
3638 default:
3639 bw = "BAD BW";
3640 }
3641
f6f046f0
GG		 3642 return scnprintf(buf, bufsz,
3643 "%s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s\n",
3644 type, rs_pretty_ant(ant), bw, mcs, nss,
3645 (rate & RATE_MCS_SGI_MSK) ? "SGI " : "NGI ",
3646 (rate & RATE_MCS_STBC_MSK) ? "STBC " : "",
3647 (rate & RATE_MCS_LDPC_MSK) ? "LDPC " : "",
3648 (rate & RATE_MCS_BF_MSK) ? "BF " : "");
1a61b347
ES		 3649}
3650
a0c38b21
ES		 3651/**
3652 * Program the device to use fixed rate for frame transmit
3653 * This is for debugging/testing only
3654 * once the device start use fixed rate, we need to reload the module
3655 * to being back the normal operation.
3656 */
3657static void rs_program_fix_rate(struct iwl_mvm *mvm,
3658 struct iwl_lq_sta *lq_sta)
3659{
3660 lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */
3661 lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
3662 lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
3663
3664 IWL_DEBUG_RATE(mvm, "sta_id %d rate 0x%X\n",
ae969afe 3665 lq_sta->lq.sta_id, lq_sta->pers.dbg_fixed_rate);
a0c38b21 3666
ae969afe 3667 if (lq_sta->pers.dbg_fixed_rate) {
7ceb98a3 3668 rs_fill_lq_cmd(mvm, NULL, lq_sta, NULL);
ae969afe 3669 iwl_mvm_send_lq_cmd(lq_sta->pers.drv, &lq_sta->lq, false);
a0c38b21
ES		 3670 }
3671}
3672
9d10849e
EG		 3673static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file,
3674 const char __user *user_buf, size_t count, loff_t *ppos)
3675{
3676 struct iwl_lq_sta *lq_sta = file->private_data;
3677 struct iwl_mvm *mvm;
3678 char buf[64];
3679 size_t buf_size;
3680 u32 parsed_rate;
3681
ae969afe 3682 mvm = lq_sta->pers.drv;
9d10849e
EG		 3683 memset(buf, 0, sizeof(buf));
3684 buf_size = min(count, sizeof(buf) - 1);
3685 if (copy_from_user(buf, user_buf, buf_size))
3686 return -EFAULT;
3687
3688 if (sscanf(buf, "%x", &parsed_rate) == 1)
ae969afe 3689 lq_sta->pers.dbg_fixed_rate = parsed_rate;
9d10849e 3690 else
ae969afe 3691 lq_sta->pers.dbg_fixed_rate = 0;
9d10849e
EG		 3692
3693 rs_program_fix_rate(mvm, lq_sta);
3694
3695 return count;
3696}
3697
8ca151b5
JB		 3698static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
3699 char __user *user_buf, size_t count, loff_t *ppos)
3700{
3701 char *buff;
3702 int desc = 0;
3703 int i = 0;
8ca151b5 3704 ssize_t ret;
f6f046f0 3705 static const size_t bufsz = 2048;
8ca151b5
JB		 3706
3707 struct iwl_lq_sta *lq_sta = file->private_data;
04e3a5da 3708 struct iwl_mvm_sta *mvmsta =
ecaf71de 3709 container_of(lq_sta, struct iwl_mvm_sta, lq_sta.rs_drv);
8ca151b5
JB		 3710 struct iwl_mvm *mvm;
3711 struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
5aa33553 3712 struct rs_rate *rate = &tbl->rate;
16c426ff 3713 u32 ss_params;
04e3a5da 3714
ae969afe 3715 mvm = lq_sta->pers.drv;
f6f046f0 3716 buff = kmalloc(bufsz, GFP_KERNEL);
8ca151b5
JB		 3717 if (!buff)
3718 return -ENOMEM;
3719
f6f046f0
GG		 3720 desc += scnprintf(buff + desc, bufsz - desc,
3721 "sta_id %d\n", lq_sta->lq.sta_id);
3722 desc += scnprintf(buff + desc, bufsz - desc,
3723 "failed=%d success=%d rate=0%lX\n",
3724 lq_sta->total_failed, lq_sta->total_success,
3725 lq_sta->active_legacy_rate);
3726 desc += scnprintf(buff + desc, bufsz - desc, "fixed rate 0x%X\n",
3727 lq_sta->pers.dbg_fixed_rate);
3728 desc += scnprintf(buff + desc, bufsz - desc, "valid_tx_ant %s%s%s\n",
a0544272
MH		 3729 (iwl_mvm_get_valid_tx_ant(mvm) & ANT_A) ? "ANT_A," : "",
3730 (iwl_mvm_get_valid_tx_ant(mvm) & ANT_B) ? "ANT_B," : "",
3731 (iwl_mvm_get_valid_tx_ant(mvm) & ANT_C) ? "ANT_C" : "");
f6f046f0
GG		 3732 desc += scnprintf(buff + desc, bufsz - desc, "lq type %s\n",
3733 (is_legacy(rate)) ? "legacy" :
3734 is_vht(rate) ? "VHT" : "HT");
5aa33553 3735 if (!is_legacy(rate)) {
f6f046f0 3736 desc += scnprintf(buff + desc, bufsz - desc, " %s",
5aa33553 3737 (is_siso(rate)) ? "SISO" : "MIMO2");
f6f046f0 3738 desc += scnprintf(buff + desc, bufsz - desc, " %s",
e70fe7eb
EG		 3739 (is_ht20(rate)) ? "20MHz" :
3740 (is_ht40(rate)) ? "40MHz" :
855f492f
GG		 3741 (is_ht80(rate)) ? "80MHz" :
3742 (is_ht160(rate)) ? "160MHz" : "BAD BW");
f6f046f0 3743 desc += scnprintf(buff + desc, bufsz - desc, " %s %s %s %s\n",
e70fe7eb
EG		 3744 (rate->sgi) ? "SGI" : "NGI",
3745 (rate->ldpc) ? "LDPC" : "BCC",
04e3a5da
EG		 3746 (lq_sta->is_agg) ? "AGG on" : "",
3747 (mvmsta->tlc_amsdu) ? "AMSDU on" : "");
8ca151b5 3748 }
f6f046f0 3749 desc += scnprintf(buff + desc, bufsz - desc, "last tx rate=0x%X\n",
8ca151b5 3750 lq_sta->last_rate_n_flags);
f6f046f0 3751 desc += scnprintf(buff + desc, bufsz - desc,
1a61b347 3752 "general: flags=0x%X mimo-d=%d s-ant=0x%x d-ant=0x%x\n",
8ca151b5
JB		 3753 lq_sta->lq.flags,
3754 lq_sta->lq.mimo_delim,
3755 lq_sta->lq.single_stream_ant_msk,
3756 lq_sta->lq.dual_stream_ant_msk);
3757
f6f046f0 3758 desc += scnprintf(buff + desc, bufsz - desc,
8ca151b5
JB		 3759 "agg: time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n",
3760 le16_to_cpu(lq_sta->lq.agg_time_limit),
3761 lq_sta->lq.agg_disable_start_th,
3762 lq_sta->lq.agg_frame_cnt_limit);
3763
f6f046f0
GG		 3764 desc += scnprintf(buff + desc, bufsz - desc, "reduced tpc=%d\n",
3765 lq_sta->lq.reduced_tpc);
16c426ff 3766 ss_params = le32_to_cpu(lq_sta->lq.ss_params);
f6f046f0
GG		 3767 desc += scnprintf(buff + desc, bufsz - desc,
3768 "single stream params: %s%s%s%s\n",
16c426ff 3769 (ss_params & LQ_SS_PARAMS_VALID) ?
db7c689d 3770 "VALID" : "INVALID",
16c426ff 3771 (ss_params & LQ_SS_BFER_ALLOWED) ?
db7c689d 3772 ", BFER" : "",
16c426ff 3773 (ss_params & LQ_SS_STBC_1SS_ALLOWED) ?
db7c689d 3774 ", STBC" : "",
16c426ff 3775 (ss_params & LQ_SS_FORCE) ?
db7c689d 3776 ", FORCE" : "");
f6f046f0 3777 desc += scnprintf(buff + desc, bufsz - desc,
8ca151b5
JB		 3778 "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n",
3779 lq_sta->lq.initial_rate_index[0],
3780 lq_sta->lq.initial_rate_index[1],
3781 lq_sta->lq.initial_rate_index[2],
3782 lq_sta->lq.initial_rate_index[3]);
3783
3784 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
cf4ef654 3785 u32 r = le32_to_cpu(lq_sta->lq.rs_table[i]);
1a61b347 3786
f6f046f0
GG		 3787 desc += scnprintf(buff + desc, bufsz - desc,
3788 " rate[%d] 0x%X ", i, r);
3789 desc += rs_pretty_print_rate(buff + desc, bufsz - desc, r);
8ca151b5
JB		 3790 }
3791
3792 ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
3793 kfree(buff);
3794 return ret;
3795}
3796
3797static const struct file_operations rs_sta_dbgfs_scale_table_ops = {
3798 .write = rs_sta_dbgfs_scale_table_write,
3799 .read = rs_sta_dbgfs_scale_table_read,
3800 .open = simple_open,
3801 .llseek = default_llseek,
3802};
3803static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file,
3804 char __user *user_buf, size_t count, loff_t *ppos)
3805{
3806 char *buff;
3807 int desc = 0;
3808 int i, j;
3809 ssize_t ret;
d310e405 3810 struct iwl_scale_tbl_info *tbl;
5aa33553 3811 struct rs_rate *rate;
8ca151b5
JB		 3812 struct iwl_lq_sta *lq_sta = file->private_data;
3813
3814 buff = kmalloc(1024, GFP_KERNEL);
3815 if (!buff)
3816 return -ENOMEM;
3817
3818 for (i = 0; i < LQ_SIZE; i++) {
d310e405 3819 tbl = &(lq_sta->lq_info[i]);
5aa33553 3820 rate = &tbl->rate;
8ca151b5 3821 desc += sprintf(buff+desc,
6a524f48 3822 "%s type=%d SGI=%d BW=%s DUP=0\n"
8fc7c58c 3823 "index=%d\n",
8ca151b5 3824 lq_sta->active_tbl == i ? "*" : "x",
5aa33553
ES		 3825 rate->type,
3826 rate->sgi,
855f492f
GG		 3827 is_ht20(rate) ? "20MHz" :
3828 is_ht40(rate) ? "40MHz" :
3829 is_ht80(rate) ? "80MHz" :
3830 is_ht160(rate) ? "160MHz" : "ERR",
8fc7c58c 3831 rate->index);
8ca151b5
JB		 3832 for (j = 0; j < IWL_RATE_COUNT; j++) {
3833 desc += sprintf(buff+desc,
3834 "counter=%d success=%d %%=%d\n",
d310e405
ES		 3835 tbl->win[j].counter,
3836 tbl->win[j].success_counter,
3837 tbl->win[j].success_ratio);
8ca151b5
JB		 3838 }
3839 }
3840 ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
3841 kfree(buff);
3842 return ret;
3843}
3844
3845static const struct file_operations rs_sta_dbgfs_stats_table_ops = {
3846 .read = rs_sta_dbgfs_stats_table_read,
3847 .open = simple_open,
3848 .llseek = default_llseek,
3849};
3850
757cf23b
ES		 3851static ssize_t rs_sta_dbgfs_drv_tx_stats_read(struct file *file,
3852 char __user *user_buf,
3853 size_t count, loff_t *ppos)
3854{
3855 static const char * const column_name[] = {
3856 [RS_COLUMN_LEGACY_ANT_A] = "LEGACY_ANT_A",
3857 [RS_COLUMN_LEGACY_ANT_B] = "LEGACY_ANT_B",
3858 [RS_COLUMN_SISO_ANT_A] = "SISO_ANT_A",
3859 [RS_COLUMN_SISO_ANT_B] = "SISO_ANT_B",
3860 [RS_COLUMN_SISO_ANT_A_SGI] = "SISO_ANT_A_SGI",
3861 [RS_COLUMN_SISO_ANT_B_SGI] = "SISO_ANT_B_SGI",
3862 [RS_COLUMN_MIMO2] = "MIMO2",
3863 [RS_COLUMN_MIMO2_SGI] = "MIMO2_SGI",
3864 };
3865
3866 static const char * const rate_name[] = {
3867 [IWL_RATE_1M_INDEX] = "1M",
3868 [IWL_RATE_2M_INDEX] = "2M",
3869 [IWL_RATE_5M_INDEX] = "5.5M",
3870 [IWL_RATE_11M_INDEX] = "11M",
3871 [IWL_RATE_6M_INDEX] = "6M|MCS0",
3872 [IWL_RATE_9M_INDEX] = "9M",
3873 [IWL_RATE_12M_INDEX] = "12M|MCS1",
3874 [IWL_RATE_18M_INDEX] = "18M|MCS2",
3875 [IWL_RATE_24M_INDEX] = "24M|MCS3",
3876 [IWL_RATE_36M_INDEX] = "36M|MCS4",
3877 [IWL_RATE_48M_INDEX] = "48M|MCS5",
3878 [IWL_RATE_54M_INDEX] = "54M|MCS6",
3879 [IWL_RATE_MCS_7_INDEX] = "MCS7",
3880 [IWL_RATE_MCS_8_INDEX] = "MCS8",
3881 [IWL_RATE_MCS_9_INDEX] = "MCS9",
3882 };
3883
3884 char *buff, *pos, *endpos;
3885 int col, rate;
3886 ssize_t ret;
3887 struct iwl_lq_sta *lq_sta = file->private_data;
3888 struct rs_rate_stats *stats;
3889 static const size_t bufsz = 1024;
3890
3891 buff = kmalloc(bufsz, GFP_KERNEL);
3892 if (!buff)
3893 return -ENOMEM;
3894
3895 pos = buff;
3896 endpos = pos + bufsz;
3897
3898 pos += scnprintf(pos, endpos - pos, "COLUMN,");
3899 for (rate = 0; rate < IWL_RATE_COUNT; rate++)
3900 pos += scnprintf(pos, endpos - pos, "%s,", rate_name[rate]);
3901 pos += scnprintf(pos, endpos - pos, "\n");
3902
3903 for (col = 0; col < RS_COLUMN_COUNT; col++) {
3904 pos += scnprintf(pos, endpos - pos,
3905 "%s,", column_name[col]);
3906
3907 for (rate = 0; rate < IWL_RATE_COUNT; rate++) {
f58220f6 3908 stats = &(lq_sta->pers.tx_stats[col][rate]);
757cf23b
ES		 3909 pos += scnprintf(pos, endpos - pos,
3910 "%llu/%llu,",
3911 stats->success,
3912 stats->total);
3913 }
3914 pos += scnprintf(pos, endpos - pos, "\n");
3915 }
3916
3917 ret = simple_read_from_buffer(user_buf, count, ppos, buff, pos - buff);
3918 kfree(buff);
3919 return ret;
3920}
3921
3922static ssize_t rs_sta_dbgfs_drv_tx_stats_write(struct file *file,
3923 const char __user *user_buf,
3924 size_t count, loff_t *ppos)
3925{
3926 struct iwl_lq_sta *lq_sta = file->private_data;
f58220f6 3927 memset(lq_sta->pers.tx_stats, 0, sizeof(lq_sta->pers.tx_stats));
757cf23b
ES		 3928
3929 return count;
3930}
3931
3932static const struct file_operations rs_sta_dbgfs_drv_tx_stats_ops = {
3933 .read = rs_sta_dbgfs_drv_tx_stats_read,
3934 .write = rs_sta_dbgfs_drv_tx_stats_write,
3935 .open = simple_open,
3936 .llseek = default_llseek,
3937};
3938
1e9c62fa
ES		 3939static ssize_t iwl_dbgfs_ss_force_read(struct file *file,
3940 char __user *user_buf,
3941 size_t count, loff_t *ppos)
3942{
3943 struct iwl_lq_sta *lq_sta = file->private_data;
3944 char buf[12];
3945 int bufsz = sizeof(buf);
3946 int pos = 0;
3947 static const char * const ss_force_name[] = {
3948 [RS_SS_FORCE_NONE] = "none",
3949 [RS_SS_FORCE_STBC] = "stbc",
3950 [RS_SS_FORCE_BFER] = "bfer",
3951 [RS_SS_FORCE_SISO] = "siso",
3952 };
3953
3954 pos += scnprintf(buf+pos, bufsz-pos, "%s\n",
878985ce 3955 ss_force_name[lq_sta->pers.ss_force]);
1e9c62fa
ES		 3956 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
3957}
3958
3959static ssize_t iwl_dbgfs_ss_force_write(struct iwl_lq_sta *lq_sta, char *buf,
3960 size_t count, loff_t *ppos)
3961{
3962 struct iwl_mvm *mvm = lq_sta->pers.drv;
3963 int ret = 0;
3964
3965 if (!strncmp("none", buf, 4)) {
878985ce 3966 lq_sta->pers.ss_force = RS_SS_FORCE_NONE;
1e9c62fa 3967 } else if (!strncmp("siso", buf, 4)) {
878985ce 3968 lq_sta->pers.ss_force = RS_SS_FORCE_SISO;
1e9c62fa
ES		 3969 } else if (!strncmp("stbc", buf, 4)) {
3970 if (lq_sta->stbc_capable) {
878985ce 3971 lq_sta->pers.ss_force = RS_SS_FORCE_STBC;
1e9c62fa
ES		 3972 } else {
3973 IWL_ERR(mvm,
3974 "can't force STBC. peer doesn't support\n");
3975 ret = -EINVAL;
3976 }
3977 } else if (!strncmp("bfer", buf, 4)) {
3978 if (lq_sta->bfer_capable) {
878985ce 3979 lq_sta->pers.ss_force = RS_SS_FORCE_BFER;
1e9c62fa
ES		 3980 } else {
3981 IWL_ERR(mvm,
3982 "can't force BFER. peer doesn't support\n");
3983 ret = -EINVAL;
3984 }
3985 } else {
3986 IWL_ERR(mvm, "valid values none|siso|stbc|bfer\n");
3987 ret = -EINVAL;
3988 }
3989 return ret ?: count;
3990}
3991
3992#define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
3993 _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct iwl_lq_sta)
3994#define MVM_DEBUGFS_ADD_FILE_RS(name, parent, mode) do { \
3995 if (!debugfs_create_file(#name, mode, parent, lq_sta, \
3996 &iwl_dbgfs_##name##_ops)) \
3997 goto err; \
3998 } while (0)
3999
4000MVM_DEBUGFS_READ_WRITE_FILE_OPS(ss_force, 32);
4001
9f66a397
GG		 4002static void rs_drv_add_sta_debugfs(void *mvm, void *priv_sta,
4003 struct dentry *dir)
8ca151b5 4004{
dcbc17ad
JB		 4005 struct iwl_lq_sta *lq_sta = priv_sta;
4006 struct iwl_mvm_sta *mvmsta;
4007
ecaf71de 4008 mvmsta = container_of(lq_sta, struct iwl_mvm_sta, lq_sta.rs_drv);
dcbc17ad
JB		 4009
4010 if (!mvmsta->vif)
4011 return;
1e9c62fa 4012
c6e1faad
EP		 4013 debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir,
4014 lq_sta, &rs_sta_dbgfs_scale_table_ops);
4015 debugfs_create_file("rate_stats_table", S_IRUSR, dir,
4016 lq_sta, &rs_sta_dbgfs_stats_table_ops);
4017 debugfs_create_file("drv_tx_stats", S_IRUSR | S_IWUSR, dir,
4018 lq_sta, &rs_sta_dbgfs_drv_tx_stats_ops);
4019 debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir,
4020 &lq_sta->tx_agg_tid_en);
4021 debugfs_create_u8("reduced_tpc", S_IRUSR | S_IWUSR, dir,
4022 &lq_sta->pers.dbg_fixed_txp_reduction);
1e9c62fa
ES		 4023
4024 MVM_DEBUGFS_ADD_FILE_RS(ss_force, dir, S_IRUSR | S_IWUSR);
4025 return;
4026err:
4027 IWL_ERR((struct iwl_mvm *)mvm, "Can't create debugfs entity\n");
8ca151b5
JB		 4028}
4029
9f66a397 4030void rs_remove_sta_debugfs(void *mvm, void *mvm_sta)
8ca151b5 4031{
8ca151b5
JB		 4032}
4033#endif
4034
4035/*
4036 * Initialization of rate scaling information is done by driver after
4037 * the station is added. Since mac80211 calls this function before a
4038 * station is added we ignore it.
4039 */
9f66a397
GG		 4040static void rs_rate_init_ops(void *mvm_r,
4041 struct ieee80211_supported_band *sband,
4042 struct cfg80211_chan_def *chandef,
4043 struct ieee80211_sta *sta, void *mvm_sta)
8ca151b5
JB		 4044{
4045}
631ad703 4046
9f66a397
GG		 4047/* ops for rate scaling implemented in the driver */
4048static const struct rate_control_ops rs_mvm_ops_drv = {
8ca151b5 4049 .name = RS_NAME,
9f66a397
GG		 4050 .tx_status = rs_drv_mac80211_tx_status,
4051 .get_rate = rs_drv_get_rate,
4052 .rate_init = rs_rate_init_ops,
8ca151b5
JB		 4053 .alloc = rs_alloc,
4054 .free = rs_free,
9f66a397 4055 .alloc_sta = rs_drv_alloc_sta,
8ca151b5 4056 .free_sta = rs_free_sta,
9f66a397 4057 .rate_update = rs_drv_rate_update,
8ca151b5 4058#ifdef CONFIG_MAC80211_DEBUGFS
9f66a397
GG		 4059 .add_sta_debugfs = rs_drv_add_sta_debugfs,
4060 .remove_sta_debugfs = rs_remove_sta_debugfs,
8ca151b5
JB		 4061#endif
4062};
4063
9f66a397
GG		 4064void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
4065 enum nl80211_band band, bool init)
4066{
4243edb4 4067 if (iwl_mvm_has_tlc_offload(mvm))
9f66a397
GG		 4068 rs_fw_rate_init(mvm, sta, band);
4069 else
4070 rs_drv_rate_init(mvm, sta, band, init);
4071}
4072
8ca151b5
JB		 4073int iwl_mvm_rate_control_register(void)
4074{
9f66a397 4075 return ieee80211_rate_control_register(&rs_mvm_ops_drv);
8ca151b5
JB		 4076}
4077
4078void iwl_mvm_rate_control_unregister(void)
4079{
9f66a397 4080 ieee80211_rate_control_unregister(&rs_mvm_ops_drv);
8ca151b5 4081}
9ee718aa 4082
110b32f0
GG		 4083static int rs_drv_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
4084 bool enable)
9ee718aa 4085{
ecaf71de 4086 struct iwl_lq_cmd *lq = &mvmsta->lq_sta.rs_drv.lq;
e126b5d9 4087
9ee718aa
EL		 4088 lockdep_assert_held(&mvm->mutex);
4089
4090 if (enable) {
4091 if (mvmsta->tx_protection == 0)
d307ec8d 4092 lq->flags |= LQ_FLAG_USE_RTS_MSK;
9ee718aa
EL		 4093 mvmsta->tx_protection++;
4094 } else {
4095 mvmsta->tx_protection--;
4096 if (mvmsta->tx_protection == 0)
d307ec8d 4097 lq->flags &= ~LQ_FLAG_USE_RTS_MSK;
9ee718aa
EL		 4098 }
4099
9e680946 4100 return iwl_mvm_send_lq_cmd(mvm, lq, false);
9ee718aa 4101}
110b32f0
GG		 4102
4103/**
4104 * iwl_mvm_tx_protection - ask FW to enable RTS/CTS protection
4105 * @mvmsta: The station
4106 * @enable: Enable Tx protection?
4107 */
4108int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
4109 bool enable)
4110{
4243edb4 4111 if (iwl_mvm_has_tlc_offload(mvm))
110b32f0
GG		 4112 return rs_fw_tx_protection(mvm, mvmsta, enable);
4113 else
4114 return rs_drv_tx_protection(mvm, mvmsta, enable);
4115}
Linux 6.x block layer and io_uring tree(s)