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