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8ca151b5 JB |
1 | /****************************************************************************** |
2 | * | |
51368bf7 | 3 | * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved. |
8b4139dc | 4 | * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH |
8ca151b5 JB |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of version 2 of the GNU General Public License as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along with | |
16 | * this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | |
18 | * | |
19 | * The full GNU General Public License is included in this distribution in the | |
20 | * file called LICENSE. | |
21 | * | |
22 | * Contact Information: | |
23 | * Intel Linux Wireless <ilw@linux.intel.com> | |
24 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
25 | * | |
26 | *****************************************************************************/ | |
27 | #include <linux/kernel.h> | |
8ca151b5 JB |
28 | #include <linux/skbuff.h> |
29 | #include <linux/slab.h> | |
30 | #include <net/mac80211.h> | |
31 | ||
32 | #include <linux/netdevice.h> | |
33 | #include <linux/etherdevice.h> | |
34 | #include <linux/delay.h> | |
35 | ||
36 | #include <linux/workqueue.h> | |
37 | #include "rs.h" | |
38 | #include "fw-api.h" | |
39 | #include "sta.h" | |
40 | #include "iwl-op-mode.h" | |
41 | #include "mvm.h" | |
42 | ||
43 | #define RS_NAME "iwl-mvm-rs" | |
44 | ||
8ca151b5 | 45 | #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
8ca151b5 | 46 | |
834437da ES |
47 | /* Calculations of success ratio are done in fixed point where 12800 is 100%. |
48 | * Use this macro when dealing with thresholds consts set as a percentage | |
49 | */ | |
50 | #define RS_PERCENT(x) (128 * x) | |
8ca151b5 JB |
51 | |
52 | static u8 rs_ht_to_legacy[] = { | |
da87d7d5 ES |
53 | [IWL_RATE_MCS_0_INDEX] = IWL_RATE_6M_INDEX, |
54 | [IWL_RATE_MCS_1_INDEX] = IWL_RATE_9M_INDEX, | |
55 | [IWL_RATE_MCS_2_INDEX] = IWL_RATE_12M_INDEX, | |
56 | [IWL_RATE_MCS_3_INDEX] = IWL_RATE_18M_INDEX, | |
57 | [IWL_RATE_MCS_4_INDEX] = IWL_RATE_24M_INDEX, | |
58 | [IWL_RATE_MCS_5_INDEX] = IWL_RATE_36M_INDEX, | |
59 | [IWL_RATE_MCS_6_INDEX] = IWL_RATE_48M_INDEX, | |
60 | [IWL_RATE_MCS_7_INDEX] = IWL_RATE_54M_INDEX, | |
61 | [IWL_RATE_MCS_8_INDEX] = IWL_RATE_54M_INDEX, | |
62 | [IWL_RATE_MCS_9_INDEX] = IWL_RATE_54M_INDEX, | |
8ca151b5 JB |
63 | }; |
64 | ||
65 | static const u8 ant_toggle_lookup[] = { | |
ef4394b9 EP |
66 | [ANT_NONE] = ANT_NONE, |
67 | [ANT_A] = ANT_B, | |
68 | [ANT_B] = ANT_C, | |
69 | [ANT_AB] = ANT_BC, | |
70 | [ANT_C] = ANT_A, | |
71 | [ANT_AC] = ANT_AB, | |
72 | [ANT_BC] = ANT_AC, | |
73 | [ANT_ABC] = ANT_ABC, | |
8ca151b5 JB |
74 | }; |
75 | ||
d310e405 ES |
76 | #define IWL_DECLARE_RATE_INFO(r, s, rp, rn) \ |
77 | [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \ | |
78 | IWL_RATE_HT_SISO_MCS_##s##_PLCP, \ | |
79 | IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \ | |
80 | IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \ | |
81 | IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP,\ | |
82 | IWL_RATE_##rp##M_INDEX, \ | |
ab055ce9 | 83 | IWL_RATE_##rn##M_INDEX } |
8ca151b5 | 84 | |
d310e405 ES |
85 | #define IWL_DECLARE_MCS_RATE(s) \ |
86 | [IWL_RATE_MCS_##s##_INDEX] = { IWL_RATE_INVM_PLCP, \ | |
87 | IWL_RATE_HT_SISO_MCS_##s##_PLCP, \ | |
88 | IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \ | |
89 | IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \ | |
90 | IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP, \ | |
91 | IWL_RATE_INVM_INDEX, \ | |
92 | IWL_RATE_INVM_INDEX } | |
93 | ||
8ca151b5 JB |
94 | /* |
95 | * Parameter order: | |
ab055ce9 | 96 | * rate, ht rate, prev rate, next rate |
8ca151b5 JB |
97 | * |
98 | * If there isn't a valid next or previous rate then INV is used which | |
99 | * maps to IWL_RATE_INVALID | |
100 | * | |
101 | */ | |
102 | static const struct iwl_rs_rate_info iwl_rates[IWL_RATE_COUNT] = { | |
ab055ce9 ES |
103 | IWL_DECLARE_RATE_INFO(1, INV, INV, 2), /* 1mbps */ |
104 | IWL_DECLARE_RATE_INFO(2, INV, 1, 5), /* 2mbps */ | |
105 | IWL_DECLARE_RATE_INFO(5, INV, 2, 11), /*5.5mbps */ | |
106 | IWL_DECLARE_RATE_INFO(11, INV, 9, 12), /* 11mbps */ | |
d310e405 ES |
107 | IWL_DECLARE_RATE_INFO(6, 0, 5, 11), /* 6mbps ; MCS 0 */ |
108 | IWL_DECLARE_RATE_INFO(9, INV, 6, 11), /* 9mbps */ | |
109 | IWL_DECLARE_RATE_INFO(12, 1, 11, 18), /* 12mbps ; MCS 1 */ | |
110 | IWL_DECLARE_RATE_INFO(18, 2, 12, 24), /* 18mbps ; MCS 2 */ | |
111 | IWL_DECLARE_RATE_INFO(24, 3, 18, 36), /* 24mbps ; MCS 3 */ | |
112 | IWL_DECLARE_RATE_INFO(36, 4, 24, 48), /* 36mbps ; MCS 4 */ | |
113 | IWL_DECLARE_RATE_INFO(48, 5, 36, 54), /* 48mbps ; MCS 5 */ | |
114 | IWL_DECLARE_RATE_INFO(54, 6, 48, INV), /* 54mbps ; MCS 6 */ | |
115 | IWL_DECLARE_MCS_RATE(7), /* MCS 7 */ | |
116 | IWL_DECLARE_MCS_RATE(8), /* MCS 8 */ | |
117 | IWL_DECLARE_MCS_RATE(9), /* MCS 9 */ | |
8ca151b5 JB |
118 | }; |
119 | ||
4e4b815c ES |
120 | enum rs_action { |
121 | RS_ACTION_STAY = 0, | |
122 | RS_ACTION_DOWNSCALE = -1, | |
123 | RS_ACTION_UPSCALE = 1, | |
124 | }; | |
125 | ||
b3b06a32 ES |
126 | enum rs_column_mode { |
127 | RS_INVALID = 0, | |
128 | RS_LEGACY, | |
129 | RS_SISO, | |
130 | RS_MIMO2, | |
131 | }; | |
132 | ||
fd7dbee5 | 133 | #define MAX_NEXT_COLUMNS 7 |
b3b06a32 ES |
134 | #define MAX_COLUMN_CHECKS 3 |
135 | ||
136 | typedef bool (*allow_column_func_t) (struct iwl_mvm *mvm, | |
137 | struct ieee80211_sta *sta, | |
138 | struct iwl_scale_tbl_info *tbl); | |
139 | ||
140 | struct rs_tx_column { | |
141 | enum rs_column_mode mode; | |
142 | u8 ant; | |
143 | bool sgi; | |
144 | enum rs_column next_columns[MAX_NEXT_COLUMNS]; | |
145 | allow_column_func_t checks[MAX_COLUMN_CHECKS]; | |
146 | }; | |
147 | ||
219fb66b EG |
148 | static bool rs_ant_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
149 | struct iwl_scale_tbl_info *tbl) | |
150 | { | |
151 | return iwl_mvm_bt_coex_is_ant_avail(mvm, tbl->rate.ant); | |
152 | } | |
153 | ||
b3b06a32 ES |
154 | static bool rs_mimo_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
155 | struct iwl_scale_tbl_info *tbl) | |
156 | { | |
157 | if (!sta->ht_cap.ht_supported) | |
158 | return false; | |
159 | ||
160 | if (sta->smps_mode == IEEE80211_SMPS_STATIC) | |
161 | return false; | |
162 | ||
a0544272 | 163 | if (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) < 2) |
b3b06a32 ES |
164 | return false; |
165 | ||
166 | if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) | |
167 | return false; | |
168 | ||
169 | return true; | |
170 | } | |
171 | ||
172 | static bool rs_siso_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
173 | struct iwl_scale_tbl_info *tbl) | |
174 | { | |
175 | if (!sta->ht_cap.ht_supported) | |
176 | return false; | |
177 | ||
178 | return true; | |
179 | } | |
180 | ||
181 | static bool rs_sgi_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
182 | struct iwl_scale_tbl_info *tbl) | |
183 | { | |
184 | struct rs_rate *rate = &tbl->rate; | |
185 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; | |
186 | struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; | |
187 | ||
188 | if (is_ht20(rate) && (ht_cap->cap & | |
189 | IEEE80211_HT_CAP_SGI_20)) | |
190 | return true; | |
191 | if (is_ht40(rate) && (ht_cap->cap & | |
192 | IEEE80211_HT_CAP_SGI_40)) | |
193 | return true; | |
194 | if (is_ht80(rate) && (vht_cap->cap & | |
195 | IEEE80211_VHT_CAP_SHORT_GI_80)) | |
196 | return true; | |
197 | ||
198 | return false; | |
199 | } | |
200 | ||
201 | static const struct rs_tx_column rs_tx_columns[] = { | |
202 | [RS_COLUMN_LEGACY_ANT_A] = { | |
203 | .mode = RS_LEGACY, | |
204 | .ant = ANT_A, | |
205 | .next_columns = { | |
206 | RS_COLUMN_LEGACY_ANT_B, | |
207 | RS_COLUMN_SISO_ANT_A, | |
31b20452 | 208 | RS_COLUMN_MIMO2, |
d8fff919 ES |
209 | RS_COLUMN_INVALID, |
210 | RS_COLUMN_INVALID, | |
fd7dbee5 ES |
211 | RS_COLUMN_INVALID, |
212 | RS_COLUMN_INVALID, | |
b3b06a32 | 213 | }, |
219fb66b EG |
214 | .checks = { |
215 | rs_ant_allow, | |
216 | }, | |
b3b06a32 ES |
217 | }, |
218 | [RS_COLUMN_LEGACY_ANT_B] = { | |
219 | .mode = RS_LEGACY, | |
220 | .ant = ANT_B, | |
221 | .next_columns = { | |
222 | RS_COLUMN_LEGACY_ANT_A, | |
223 | RS_COLUMN_SISO_ANT_B, | |
31b20452 | 224 | RS_COLUMN_MIMO2, |
d8fff919 ES |
225 | RS_COLUMN_INVALID, |
226 | RS_COLUMN_INVALID, | |
fd7dbee5 ES |
227 | RS_COLUMN_INVALID, |
228 | RS_COLUMN_INVALID, | |
b3b06a32 | 229 | }, |
219fb66b EG |
230 | .checks = { |
231 | rs_ant_allow, | |
232 | }, | |
b3b06a32 ES |
233 | }, |
234 | [RS_COLUMN_SISO_ANT_A] = { | |
235 | .mode = RS_SISO, | |
236 | .ant = ANT_A, | |
237 | .next_columns = { | |
238 | RS_COLUMN_SISO_ANT_B, | |
239 | RS_COLUMN_MIMO2, | |
240 | RS_COLUMN_SISO_ANT_A_SGI, | |
fd7dbee5 ES |
241 | RS_COLUMN_LEGACY_ANT_A, |
242 | RS_COLUMN_LEGACY_ANT_B, | |
d8fff919 | 243 | RS_COLUMN_INVALID, |
31b20452 | 244 | RS_COLUMN_INVALID, |
b3b06a32 ES |
245 | }, |
246 | .checks = { | |
247 | rs_siso_allow, | |
219fb66b | 248 | rs_ant_allow, |
b3b06a32 ES |
249 | }, |
250 | }, | |
251 | [RS_COLUMN_SISO_ANT_B] = { | |
252 | .mode = RS_SISO, | |
253 | .ant = ANT_B, | |
254 | .next_columns = { | |
255 | RS_COLUMN_SISO_ANT_A, | |
256 | RS_COLUMN_MIMO2, | |
257 | RS_COLUMN_SISO_ANT_B_SGI, | |
fd7dbee5 ES |
258 | RS_COLUMN_LEGACY_ANT_A, |
259 | RS_COLUMN_LEGACY_ANT_B, | |
d8fff919 | 260 | RS_COLUMN_INVALID, |
31b20452 | 261 | RS_COLUMN_INVALID, |
b3b06a32 ES |
262 | }, |
263 | .checks = { | |
264 | rs_siso_allow, | |
219fb66b | 265 | rs_ant_allow, |
b3b06a32 ES |
266 | }, |
267 | }, | |
268 | [RS_COLUMN_SISO_ANT_A_SGI] = { | |
269 | .mode = RS_SISO, | |
270 | .ant = ANT_A, | |
271 | .sgi = true, | |
272 | .next_columns = { | |
273 | RS_COLUMN_SISO_ANT_B_SGI, | |
274 | RS_COLUMN_MIMO2_SGI, | |
275 | RS_COLUMN_SISO_ANT_A, | |
fd7dbee5 ES |
276 | RS_COLUMN_LEGACY_ANT_A, |
277 | RS_COLUMN_LEGACY_ANT_B, | |
31b20452 ES |
278 | RS_COLUMN_INVALID, |
279 | RS_COLUMN_INVALID, | |
b3b06a32 ES |
280 | }, |
281 | .checks = { | |
282 | rs_siso_allow, | |
219fb66b | 283 | rs_ant_allow, |
b3b06a32 ES |
284 | rs_sgi_allow, |
285 | }, | |
286 | }, | |
287 | [RS_COLUMN_SISO_ANT_B_SGI] = { | |
288 | .mode = RS_SISO, | |
289 | .ant = ANT_B, | |
290 | .sgi = true, | |
291 | .next_columns = { | |
292 | RS_COLUMN_SISO_ANT_A_SGI, | |
293 | RS_COLUMN_MIMO2_SGI, | |
294 | RS_COLUMN_SISO_ANT_B, | |
fd7dbee5 ES |
295 | RS_COLUMN_LEGACY_ANT_A, |
296 | RS_COLUMN_LEGACY_ANT_B, | |
31b20452 ES |
297 | RS_COLUMN_INVALID, |
298 | RS_COLUMN_INVALID, | |
b3b06a32 ES |
299 | }, |
300 | .checks = { | |
301 | rs_siso_allow, | |
219fb66b | 302 | rs_ant_allow, |
b3b06a32 ES |
303 | rs_sgi_allow, |
304 | }, | |
305 | }, | |
306 | [RS_COLUMN_MIMO2] = { | |
307 | .mode = RS_MIMO2, | |
308 | .ant = ANT_AB, | |
309 | .next_columns = { | |
310 | RS_COLUMN_SISO_ANT_A, | |
311 | RS_COLUMN_MIMO2_SGI, | |
fd7dbee5 ES |
312 | RS_COLUMN_LEGACY_ANT_A, |
313 | RS_COLUMN_LEGACY_ANT_B, | |
31b20452 ES |
314 | RS_COLUMN_INVALID, |
315 | RS_COLUMN_INVALID, | |
316 | RS_COLUMN_INVALID, | |
b3b06a32 ES |
317 | }, |
318 | .checks = { | |
319 | rs_mimo_allow, | |
320 | }, | |
321 | }, | |
322 | [RS_COLUMN_MIMO2_SGI] = { | |
323 | .mode = RS_MIMO2, | |
324 | .ant = ANT_AB, | |
325 | .sgi = true, | |
326 | .next_columns = { | |
327 | RS_COLUMN_SISO_ANT_A_SGI, | |
328 | RS_COLUMN_MIMO2, | |
fd7dbee5 ES |
329 | RS_COLUMN_LEGACY_ANT_A, |
330 | RS_COLUMN_LEGACY_ANT_B, | |
31b20452 ES |
331 | RS_COLUMN_INVALID, |
332 | RS_COLUMN_INVALID, | |
333 | RS_COLUMN_INVALID, | |
b3b06a32 ES |
334 | }, |
335 | .checks = { | |
336 | rs_mimo_allow, | |
337 | rs_sgi_allow, | |
338 | }, | |
339 | }, | |
340 | }; | |
341 | ||
8ca151b5 JB |
342 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
343 | { | |
344 | /* also works for HT because bits 7:6 are zero there */ | |
345 | return (u8)(rate_n_flags & RATE_LEGACY_RATE_MSK); | |
346 | } | |
347 | ||
348 | static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags) | |
349 | { | |
350 | int idx = 0; | |
351 | ||
8ca151b5 | 352 | if (rate_n_flags & RATE_MCS_HT_MSK) { |
d310e405 ES |
353 | idx = rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK; |
354 | idx += IWL_RATE_MCS_0_INDEX; | |
8ca151b5 | 355 | |
d310e405 | 356 | /* skip 9M not supported in HT*/ |
8ca151b5 JB |
357 | if (idx >= IWL_RATE_9M_INDEX) |
358 | idx += 1; | |
4e82dd3a | 359 | if ((idx >= IWL_FIRST_HT_RATE) && (idx <= IWL_LAST_HT_RATE)) |
8ca151b5 | 360 | return idx; |
d310e405 ES |
361 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { |
362 | idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; | |
363 | idx += IWL_RATE_MCS_0_INDEX; | |
8ca151b5 | 364 | |
d310e405 ES |
365 | /* skip 9M not supported in VHT*/ |
366 | if (idx >= IWL_RATE_9M_INDEX) | |
367 | idx++; | |
368 | if ((idx >= IWL_FIRST_VHT_RATE) && (idx <= IWL_LAST_VHT_RATE)) | |
369 | return idx; | |
8ca151b5 | 370 | } else { |
d310e405 ES |
371 | /* legacy rate format, search for match in table */ |
372 | ||
373 | u8 legacy_rate = rs_extract_rate(rate_n_flags); | |
8ca151b5 | 374 | for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++) |
d310e405 | 375 | if (iwl_rates[idx].plcp == legacy_rate) |
8ca151b5 JB |
376 | return idx; |
377 | } | |
378 | ||
560843f4 | 379 | return IWL_RATE_INVALID; |
8ca151b5 JB |
380 | } |
381 | ||
382 | static void rs_rate_scale_perform(struct iwl_mvm *mvm, | |
1ebc8f2e ES |
383 | struct ieee80211_sta *sta, |
384 | struct iwl_lq_sta *lq_sta, | |
385 | int tid); | |
8fc7c58c ES |
386 | static void rs_fill_lq_cmd(struct iwl_mvm *mvm, |
387 | struct ieee80211_sta *sta, | |
388 | struct iwl_lq_sta *lq_sta, | |
389 | const struct rs_rate *initial_rate); | |
8ca151b5 | 390 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search); |
8ca151b5 | 391 | |
8ca151b5 JB |
392 | /** |
393 | * The following tables contain the expected throughput metrics for all rates | |
394 | * | |
395 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
396 | * | |
397 | * where invalid entries are zeros. | |
398 | * | |
399 | * CCK rates are only valid in legacy table and will only be used in G | |
400 | * (2.4 GHz) band. | |
401 | */ | |
402 | ||
a34529e8 | 403 | static const u16 expected_tpt_legacy[IWL_RATE_COUNT] = { |
4e82dd3a | 404 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0, 0, 0 |
8ca151b5 JB |
405 | }; |
406 | ||
4e82dd3a ES |
407 | /* Expected TpT tables. 4 indexes: |
408 | * 0 - NGI, 1 - SGI, 2 - AGG+NGI, 3 - AGG+SGI | |
409 | */ | |
a34529e8 | 410 | static const u16 expected_tpt_siso_20MHz[4][IWL_RATE_COUNT] = { |
4e82dd3a ES |
411 | {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202, 216, 0}, |
412 | {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210, 225, 0}, | |
413 | {0, 0, 0, 0, 49, 0, 97, 145, 192, 285, 375, 420, 464, 551, 0}, | |
414 | {0, 0, 0, 0, 54, 0, 108, 160, 213, 315, 415, 465, 513, 608, 0}, | |
8ca151b5 JB |
415 | }; |
416 | ||
a34529e8 | 417 | static const u16 expected_tpt_siso_40MHz[4][IWL_RATE_COUNT] = { |
4e82dd3a ES |
418 | {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257, 269, 275}, |
419 | {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264, 275, 280}, | |
420 | {0, 0, 0, 0, 101, 0, 199, 295, 389, 570, 744, 828, 911, 1070, 1173}, | |
421 | {0, 0, 0, 0, 112, 0, 220, 326, 429, 629, 819, 912, 1000, 1173, 1284}, | |
8ca151b5 JB |
422 | }; |
423 | ||
a34529e8 | 424 | static const u16 expected_tpt_siso_80MHz[4][IWL_RATE_COUNT] = { |
d310e405 ES |
425 | {0, 0, 0, 0, 130, 0, 191, 223, 244, 273, 288, 294, 298, 305, 308}, |
426 | {0, 0, 0, 0, 138, 0, 200, 231, 251, 279, 293, 298, 302, 308, 312}, | |
427 | {0, 0, 0, 0, 217, 0, 429, 634, 834, 1220, 1585, 1760, 1931, 2258, 2466}, | |
428 | {0, 0, 0, 0, 241, 0, 475, 701, 921, 1343, 1741, 1931, 2117, 2468, 2691}, | |
429 | }; | |
430 | ||
a34529e8 | 431 | static const u16 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = { |
4e82dd3a ES |
432 | {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250, 261, 0}, |
433 | {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256, 267, 0}, | |
434 | {0, 0, 0, 0, 98, 0, 193, 286, 375, 550, 718, 799, 878, 1032, 0}, | |
435 | {0, 0, 0, 0, 109, 0, 214, 316, 414, 607, 790, 879, 965, 1132, 0}, | |
8ca151b5 JB |
436 | }; |
437 | ||
a34529e8 | 438 | static const u16 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = { |
4e82dd3a ES |
439 | {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289, 296, 300}, |
440 | {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293, 300, 303}, | |
441 | {0, 0, 0, 0, 200, 0, 390, 571, 741, 1067, 1365, 1505, 1640, 1894, 2053}, | |
442 | {0, 0, 0, 0, 221, 0, 430, 630, 816, 1169, 1490, 1641, 1784, 2053, 2221}, | |
8ca151b5 JB |
443 | }; |
444 | ||
a34529e8 | 445 | static const u16 expected_tpt_mimo2_80MHz[4][IWL_RATE_COUNT] = { |
d310e405 ES |
446 | {0, 0, 0, 0, 182, 0, 240, 264, 278, 299, 308, 311, 313, 317, 319}, |
447 | {0, 0, 0, 0, 190, 0, 247, 269, 282, 302, 310, 313, 315, 319, 320}, | |
448 | {0, 0, 0, 0, 428, 0, 833, 1215, 1577, 2254, 2863, 3147, 3418, 3913, 4219}, | |
449 | {0, 0, 0, 0, 474, 0, 920, 1338, 1732, 2464, 3116, 3418, 3705, 4225, 4545}, | |
450 | }; | |
451 | ||
8ca151b5 JB |
452 | /* mbps, mcs */ |
453 | static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = { | |
454 | { "1", "BPSK DSSS"}, | |
455 | { "2", "QPSK DSSS"}, | |
456 | {"5.5", "BPSK CCK"}, | |
457 | { "11", "QPSK CCK"}, | |
458 | { "6", "BPSK 1/2"}, | |
459 | { "9", "BPSK 1/2"}, | |
460 | { "12", "QPSK 1/2"}, | |
461 | { "18", "QPSK 3/4"}, | |
462 | { "24", "16QAM 1/2"}, | |
463 | { "36", "16QAM 3/4"}, | |
464 | { "48", "64QAM 2/3"}, | |
465 | { "54", "64QAM 3/4"}, | |
466 | { "60", "64QAM 5/6"}, | |
467 | }; | |
468 | ||
469 | #define MCS_INDEX_PER_STREAM (8) | |
470 | ||
9d10849e EG |
471 | static const char *rs_pretty_ant(u8 ant) |
472 | { | |
473 | static const char * const ant_name[] = { | |
474 | [ANT_NONE] = "None", | |
475 | [ANT_A] = "A", | |
476 | [ANT_B] = "B", | |
477 | [ANT_AB] = "AB", | |
478 | [ANT_C] = "C", | |
479 | [ANT_AC] = "AC", | |
480 | [ANT_BC] = "BC", | |
481 | [ANT_ABC] = "ABC", | |
482 | }; | |
483 | ||
484 | if (ant > ANT_ABC) | |
485 | return "UNKNOWN"; | |
486 | ||
487 | return ant_name[ant]; | |
488 | } | |
489 | ||
490 | static const char *rs_pretty_lq_type(enum iwl_table_type type) | |
491 | { | |
492 | static const char * const lq_types[] = { | |
493 | [LQ_NONE] = "NONE", | |
494 | [LQ_LEGACY_A] = "LEGACY_A", | |
495 | [LQ_LEGACY_G] = "LEGACY_G", | |
496 | [LQ_HT_SISO] = "HT SISO", | |
497 | [LQ_HT_MIMO2] = "HT MIMO", | |
498 | [LQ_VHT_SISO] = "VHT SISO", | |
499 | [LQ_VHT_MIMO2] = "VHT MIMO", | |
500 | }; | |
501 | ||
502 | if (type < LQ_NONE || type >= LQ_MAX) | |
503 | return "UNKNOWN"; | |
504 | ||
505 | return lq_types[type]; | |
506 | } | |
507 | ||
5aa33553 ES |
508 | static inline void rs_dump_rate(struct iwl_mvm *mvm, const struct rs_rate *rate, |
509 | const char *prefix) | |
510 | { | |
d8bafeaf | 511 | IWL_DEBUG_RATE(mvm, |
26a2cc01 | 512 | "%s: (%s: %d) ANT: %s BW: %d SGI: %d LDPC: %d STBC: %d\n", |
5aa33553 ES |
513 | prefix, rs_pretty_lq_type(rate->type), |
514 | rate->index, rs_pretty_ant(rate->ant), | |
d8bafeaf | 515 | rate->bw, rate->sgi, rate->ldpc, rate->stbc); |
5aa33553 ES |
516 | } |
517 | ||
8ca151b5 JB |
518 | static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) |
519 | { | |
520 | window->data = 0; | |
521 | window->success_counter = 0; | |
522 | window->success_ratio = IWL_INVALID_VALUE; | |
523 | window->counter = 0; | |
524 | window->average_tpt = IWL_INVALID_VALUE; | |
8ca151b5 JB |
525 | } |
526 | ||
b804eeb6 ES |
527 | static void rs_rate_scale_clear_tbl_windows(struct iwl_mvm *mvm, |
528 | struct iwl_scale_tbl_info *tbl) | |
3ca71f60 EP |
529 | { |
530 | int i; | |
531 | ||
b804eeb6 | 532 | IWL_DEBUG_RATE(mvm, "Clearing up window stats\n"); |
3ca71f60 EP |
533 | for (i = 0; i < IWL_RATE_COUNT; i++) |
534 | rs_rate_scale_clear_window(&tbl->win[i]); | |
2fd647f8 EP |
535 | |
536 | for (i = 0; i < ARRAY_SIZE(tbl->tpc_win); i++) | |
537 | rs_rate_scale_clear_window(&tbl->tpc_win[i]); | |
3ca71f60 EP |
538 | } |
539 | ||
8ca151b5 JB |
540 | static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
541 | { | |
542 | return (ant_type & valid_antenna) == ant_type; | |
543 | } | |
544 | ||
8ca151b5 JB |
545 | static int rs_tl_turn_on_agg_for_tid(struct iwl_mvm *mvm, |
546 | struct iwl_lq_sta *lq_data, u8 tid, | |
547 | struct ieee80211_sta *sta) | |
548 | { | |
549 | int ret = -EAGAIN; | |
8ca151b5 | 550 | |
44cc429c EG |
551 | IWL_DEBUG_HT(mvm, "Starting Tx agg: STA: %pM tid: %d\n", |
552 | sta->addr, tid); | |
553 | ret = ieee80211_start_tx_ba_session(sta, tid, 5000); | |
554 | if (ret == -EAGAIN) { | |
555 | /* | |
556 | * driver and mac80211 is out of sync | |
557 | * this might be cause by reloading firmware | |
558 | * stop the tx ba session here | |
559 | */ | |
560 | IWL_ERR(mvm, "Fail start Tx agg on tid: %d\n", | |
561 | tid); | |
562 | ieee80211_stop_tx_ba_session(sta, tid); | |
8ca151b5 JB |
563 | } |
564 | return ret; | |
565 | } | |
566 | ||
567 | static void rs_tl_turn_on_agg(struct iwl_mvm *mvm, u8 tid, | |
568 | struct iwl_lq_sta *lq_data, | |
569 | struct ieee80211_sta *sta) | |
570 | { | |
571 | if (tid < IWL_MAX_TID_COUNT) | |
572 | rs_tl_turn_on_agg_for_tid(mvm, lq_data, tid, sta); | |
573 | else | |
574 | IWL_ERR(mvm, "tid exceeds max TID count: %d/%d\n", | |
575 | tid, IWL_MAX_TID_COUNT); | |
576 | } | |
577 | ||
578 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) | |
579 | { | |
580 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + | |
581 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
582 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
583 | } | |
584 | ||
585 | /* | |
586 | * Static function to get the expected throughput from an iwl_scale_tbl_info | |
587 | * that wraps a NULL pointer check | |
588 | */ | |
589 | static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index) | |
590 | { | |
591 | if (tbl->expected_tpt) | |
592 | return tbl->expected_tpt[rs_index]; | |
593 | return 0; | |
594 | } | |
595 | ||
596 | /** | |
597 | * rs_collect_tx_data - Update the success/failure sliding window | |
598 | * | |
599 | * We keep a sliding window of the last 62 packets transmitted | |
600 | * at this rate. window->data contains the bitmask of successful | |
601 | * packets. | |
602 | */ | |
834437da ES |
603 | static int _rs_collect_tx_data(struct iwl_mvm *mvm, |
604 | struct iwl_scale_tbl_info *tbl, | |
0bd3c5a7 EP |
605 | int scale_index, int attempts, int successes, |
606 | struct iwl_rate_scale_data *window) | |
8ca151b5 | 607 | { |
8ca151b5 JB |
608 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
609 | s32 fail_count, tpt; | |
610 | ||
8ca151b5 JB |
611 | /* Get expected throughput */ |
612 | tpt = get_expected_tpt(tbl, scale_index); | |
613 | ||
614 | /* | |
615 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
616 | * history window; anything older isn't really relevant any more. | |
617 | * If we have filled up the sliding window, drop the oldest attempt; | |
618 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
619 | * subtract "1" from the success counter (this is the main reason | |
620 | * we keep these bitmaps!). | |
621 | */ | |
622 | while (attempts > 0) { | |
623 | if (window->counter >= IWL_RATE_MAX_WINDOW) { | |
624 | /* remove earliest */ | |
625 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
626 | ||
627 | if (window->data & mask) { | |
628 | window->data &= ~mask; | |
629 | window->success_counter--; | |
630 | } | |
631 | } | |
632 | ||
633 | /* Increment frames-attempted counter */ | |
634 | window->counter++; | |
635 | ||
636 | /* Shift bitmap by one frame to throw away oldest history */ | |
637 | window->data <<= 1; | |
638 | ||
639 | /* Mark the most recent #successes attempts as successful */ | |
640 | if (successes > 0) { | |
641 | window->success_counter++; | |
642 | window->data |= 0x1; | |
643 | successes--; | |
644 | } | |
645 | ||
646 | attempts--; | |
647 | } | |
648 | ||
649 | /* Calculate current success ratio, avoid divide-by-0! */ | |
650 | if (window->counter > 0) | |
651 | window->success_ratio = 128 * (100 * window->success_counter) | |
652 | / window->counter; | |
653 | else | |
654 | window->success_ratio = IWL_INVALID_VALUE; | |
655 | ||
656 | fail_count = window->counter - window->success_counter; | |
657 | ||
658 | /* Calculate average throughput, if we have enough history. */ | |
834437da ES |
659 | if ((fail_count >= IWL_MVM_RS_RATE_MIN_FAILURE_TH) || |
660 | (window->success_counter >= IWL_MVM_RS_RATE_MIN_SUCCESS_TH)) | |
8ca151b5 JB |
661 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; |
662 | else | |
663 | window->average_tpt = IWL_INVALID_VALUE; | |
664 | ||
8ca151b5 JB |
665 | return 0; |
666 | } | |
667 | ||
834437da ES |
668 | static int rs_collect_tx_data(struct iwl_mvm *mvm, |
669 | struct iwl_lq_sta *lq_sta, | |
757cf23b | 670 | struct iwl_scale_tbl_info *tbl, |
2fd647f8 EP |
671 | int scale_index, int attempts, int successes, |
672 | u8 reduced_txp) | |
0bd3c5a7 EP |
673 | { |
674 | struct iwl_rate_scale_data *window = NULL; | |
2fd647f8 | 675 | int ret; |
0bd3c5a7 EP |
676 | |
677 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) | |
678 | return -EINVAL; | |
679 | ||
757cf23b | 680 | if (tbl->column != RS_COLUMN_INVALID) { |
f58220f6 ES |
681 | struct lq_sta_pers *pers = &lq_sta->pers; |
682 | ||
683 | pers->tx_stats[tbl->column][scale_index].total += attempts; | |
684 | pers->tx_stats[tbl->column][scale_index].success += successes; | |
757cf23b ES |
685 | } |
686 | ||
0bd3c5a7 EP |
687 | /* Select window for current tx bit rate */ |
688 | window = &(tbl->win[scale_index]); | |
689 | ||
834437da | 690 | ret = _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes, |
2fd647f8 EP |
691 | window); |
692 | if (ret) | |
693 | return ret; | |
694 | ||
695 | if (WARN_ON_ONCE(reduced_txp > TPC_MAX_REDUCTION)) | |
696 | return -EINVAL; | |
697 | ||
698 | window = &tbl->tpc_win[reduced_txp]; | |
834437da | 699 | return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes, |
0bd3c5a7 EP |
700 | window); |
701 | } | |
702 | ||
5aa33553 ES |
703 | /* Convert rs_rate object into ucode rate bitmask */ |
704 | static u32 ucode_rate_from_rs_rate(struct iwl_mvm *mvm, | |
8fc7c58c | 705 | struct rs_rate *rate) |
8ca151b5 | 706 | { |
5aa33553 ES |
707 | u32 ucode_rate = 0; |
708 | int index = rate->index; | |
8ca151b5 | 709 | |
5aa33553 | 710 | ucode_rate |= ((rate->ant << RATE_MCS_ANT_POS) & |
d310e405 ES |
711 | RATE_MCS_ANT_ABC_MSK); |
712 | ||
5aa33553 ES |
713 | if (is_legacy(rate)) { |
714 | ucode_rate |= iwl_rates[index].plcp; | |
8ca151b5 | 715 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
5aa33553 ES |
716 | ucode_rate |= RATE_MCS_CCK_MSK; |
717 | return ucode_rate; | |
d310e405 ES |
718 | } |
719 | ||
5aa33553 | 720 | if (is_ht(rate)) { |
d310e405 | 721 | if (index < IWL_FIRST_HT_RATE || index > IWL_LAST_HT_RATE) { |
8ca151b5 | 722 | IWL_ERR(mvm, "Invalid HT rate index %d\n", index); |
4e82dd3a | 723 | index = IWL_LAST_HT_RATE; |
8ca151b5 | 724 | } |
5aa33553 | 725 | ucode_rate |= RATE_MCS_HT_MSK; |
8ca151b5 | 726 | |
5aa33553 ES |
727 | if (is_ht_siso(rate)) |
728 | ucode_rate |= iwl_rates[index].plcp_ht_siso; | |
729 | else if (is_ht_mimo2(rate)) | |
730 | ucode_rate |= iwl_rates[index].plcp_ht_mimo2; | |
8ca151b5 | 731 | else |
d972ab31 | 732 | WARN_ON_ONCE(1); |
5aa33553 | 733 | } else if (is_vht(rate)) { |
d310e405 ES |
734 | if (index < IWL_FIRST_VHT_RATE || index > IWL_LAST_VHT_RATE) { |
735 | IWL_ERR(mvm, "Invalid VHT rate index %d\n", index); | |
736 | index = IWL_LAST_VHT_RATE; | |
737 | } | |
5aa33553 ES |
738 | ucode_rate |= RATE_MCS_VHT_MSK; |
739 | if (is_vht_siso(rate)) | |
740 | ucode_rate |= iwl_rates[index].plcp_vht_siso; | |
741 | else if (is_vht_mimo2(rate)) | |
742 | ucode_rate |= iwl_rates[index].plcp_vht_mimo2; | |
d310e405 ES |
743 | else |
744 | WARN_ON_ONCE(1); | |
745 | ||
8ca151b5 | 746 | } else { |
5aa33553 | 747 | IWL_ERR(mvm, "Invalid rate->type %d\n", rate->type); |
8ca151b5 JB |
748 | } |
749 | ||
d8bafeaf ES |
750 | if (is_siso(rate) && rate->stbc) { |
751 | /* To enable STBC we need to set both a flag and ANT_AB */ | |
752 | ucode_rate |= RATE_MCS_ANT_AB_MSK; | |
753 | ucode_rate |= RATE_MCS_VHT_STBC_MSK; | |
754 | } | |
755 | ||
5aa33553 ES |
756 | ucode_rate |= rate->bw; |
757 | if (rate->sgi) | |
758 | ucode_rate |= RATE_MCS_SGI_MSK; | |
a3576ff2 ES |
759 | if (rate->ldpc) |
760 | ucode_rate |= RATE_MCS_LDPC_MSK; | |
d310e405 | 761 | |
5aa33553 | 762 | return ucode_rate; |
8ca151b5 JB |
763 | } |
764 | ||
5aa33553 ES |
765 | /* Convert a ucode rate into an rs_rate object */ |
766 | static int rs_rate_from_ucode_rate(const u32 ucode_rate, | |
767 | enum ieee80211_band band, | |
768 | struct rs_rate *rate) | |
8ca151b5 | 769 | { |
5aa33553 ES |
770 | u32 ant_msk = ucode_rate & RATE_MCS_ANT_ABC_MSK; |
771 | u8 num_of_ant = get_num_of_ant_from_rate(ucode_rate); | |
d310e405 | 772 | u8 nss; |
8ca151b5 | 773 | |
9e898f1b | 774 | memset(rate, 0, sizeof(*rate)); |
5aa33553 | 775 | rate->index = iwl_hwrate_to_plcp_idx(ucode_rate); |
8ca151b5 | 776 | |
560843f4 | 777 | if (rate->index == IWL_RATE_INVALID) |
8ca151b5 | 778 | return -EINVAL; |
5aa33553 ES |
779 | |
780 | rate->ant = (ant_msk >> RATE_MCS_ANT_POS); | |
8ca151b5 | 781 | |
d310e405 | 782 | /* Legacy */ |
5aa33553 ES |
783 | if (!(ucode_rate & RATE_MCS_HT_MSK) && |
784 | !(ucode_rate & RATE_MCS_VHT_MSK)) { | |
8ca151b5 JB |
785 | if (num_of_ant == 1) { |
786 | if (band == IEEE80211_BAND_5GHZ) | |
5aa33553 | 787 | rate->type = LQ_LEGACY_A; |
8ca151b5 | 788 | else |
5aa33553 | 789 | rate->type = LQ_LEGACY_G; |
8ca151b5 | 790 | } |
d310e405 ES |
791 | |
792 | return 0; | |
793 | } | |
794 | ||
795 | /* HT or VHT */ | |
5aa33553 ES |
796 | if (ucode_rate & RATE_MCS_SGI_MSK) |
797 | rate->sgi = true; | |
a3576ff2 ES |
798 | if (ucode_rate & RATE_MCS_LDPC_MSK) |
799 | rate->ldpc = true; | |
d8bafeaf ES |
800 | if (ucode_rate & RATE_MCS_VHT_STBC_MSK) |
801 | rate->stbc = true; | |
d310e405 | 802 | |
5aa33553 | 803 | rate->bw = ucode_rate & RATE_MCS_CHAN_WIDTH_MSK; |
d310e405 | 804 | |
5aa33553 ES |
805 | if (ucode_rate & RATE_MCS_HT_MSK) { |
806 | nss = ((ucode_rate & RATE_HT_MCS_NSS_MSK) >> | |
d310e405 ES |
807 | RATE_HT_MCS_NSS_POS) + 1; |
808 | ||
809 | if (nss == 1) { | |
5aa33553 | 810 | rate->type = LQ_HT_SISO; |
d8bafeaf | 811 | WARN_ON_ONCE(!rate->stbc && num_of_ant != 1); |
d310e405 | 812 | } else if (nss == 2) { |
5aa33553 | 813 | rate->type = LQ_HT_MIMO2; |
d310e405 | 814 | WARN_ON_ONCE(num_of_ant != 2); |
8ca151b5 | 815 | } else { |
d310e405 ES |
816 | WARN_ON_ONCE(1); |
817 | } | |
5aa33553 ES |
818 | } else if (ucode_rate & RATE_MCS_VHT_MSK) { |
819 | nss = ((ucode_rate & RATE_VHT_MCS_NSS_MSK) >> | |
d310e405 ES |
820 | RATE_VHT_MCS_NSS_POS) + 1; |
821 | ||
822 | if (nss == 1) { | |
5aa33553 | 823 | rate->type = LQ_VHT_SISO; |
1507fb75 | 824 | WARN_ON_ONCE(!rate->stbc && num_of_ant != 1); |
d310e405 | 825 | } else if (nss == 2) { |
5aa33553 | 826 | rate->type = LQ_VHT_MIMO2; |
d310e405 ES |
827 | WARN_ON_ONCE(num_of_ant != 2); |
828 | } else { | |
829 | WARN_ON_ONCE(1); | |
8ca151b5 JB |
830 | } |
831 | } | |
d310e405 | 832 | |
5aa33553 ES |
833 | WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_160); |
834 | WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_80 && | |
835 | !is_vht(rate)); | |
d310e405 | 836 | |
8ca151b5 JB |
837 | return 0; |
838 | } | |
839 | ||
840 | /* switch to another antenna/antennas and return 1 */ | |
841 | /* if no other valid antenna found, return 0 */ | |
8fc7c58c | 842 | static int rs_toggle_antenna(u32 valid_ant, struct rs_rate *rate) |
8ca151b5 JB |
843 | { |
844 | u8 new_ant_type; | |
845 | ||
5aa33553 | 846 | if (!rate->ant || rate->ant > ANT_ABC) |
8ca151b5 JB |
847 | return 0; |
848 | ||
5aa33553 | 849 | if (!rs_is_valid_ant(valid_ant, rate->ant)) |
8ca151b5 JB |
850 | return 0; |
851 | ||
5aa33553 | 852 | new_ant_type = ant_toggle_lookup[rate->ant]; |
8ca151b5 | 853 | |
5aa33553 | 854 | while ((new_ant_type != rate->ant) && |
8ca151b5 JB |
855 | !rs_is_valid_ant(valid_ant, new_ant_type)) |
856 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
857 | ||
5aa33553 | 858 | if (new_ant_type == rate->ant) |
8ca151b5 JB |
859 | return 0; |
860 | ||
5aa33553 ES |
861 | rate->ant = new_ant_type; |
862 | ||
8ca151b5 JB |
863 | return 1; |
864 | } | |
865 | ||
8ca151b5 | 866 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
5aa33553 | 867 | struct rs_rate *rate) |
8ca151b5 | 868 | { |
5aa33553 | 869 | if (is_legacy(rate)) |
8ca151b5 | 870 | return lq_sta->active_legacy_rate; |
5aa33553 | 871 | else if (is_siso(rate)) |
d310e405 | 872 | return lq_sta->active_siso_rate; |
5aa33553 | 873 | else if (is_mimo2(rate)) |
d310e405 ES |
874 | return lq_sta->active_mimo2_rate; |
875 | ||
876 | WARN_ON_ONCE(1); | |
877 | return 0; | |
8ca151b5 JB |
878 | } |
879 | ||
880 | static u16 rs_get_adjacent_rate(struct iwl_mvm *mvm, u8 index, u16 rate_mask, | |
881 | int rate_type) | |
882 | { | |
883 | u8 high = IWL_RATE_INVALID; | |
884 | u8 low = IWL_RATE_INVALID; | |
885 | ||
886 | /* 802.11A or ht walks to the next literal adjacent rate in | |
887 | * the rate table */ | |
5aa33553 | 888 | if (is_type_a_band(rate_type) || !is_type_legacy(rate_type)) { |
8ca151b5 JB |
889 | int i; |
890 | u32 mask; | |
891 | ||
892 | /* Find the previous rate that is in the rate mask */ | |
893 | i = index - 1; | |
894 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
895 | if (rate_mask & mask) { | |
896 | low = i; | |
897 | break; | |
898 | } | |
899 | } | |
900 | ||
901 | /* Find the next rate that is in the rate mask */ | |
902 | i = index + 1; | |
903 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
904 | if (rate_mask & mask) { | |
905 | high = i; | |
906 | break; | |
907 | } | |
908 | } | |
909 | ||
910 | return (high << 8) | low; | |
911 | } | |
912 | ||
913 | low = index; | |
914 | while (low != IWL_RATE_INVALID) { | |
915 | low = iwl_rates[low].prev_rs; | |
916 | if (low == IWL_RATE_INVALID) | |
917 | break; | |
918 | if (rate_mask & (1 << low)) | |
919 | break; | |
8ca151b5 JB |
920 | } |
921 | ||
922 | high = index; | |
923 | while (high != IWL_RATE_INVALID) { | |
924 | high = iwl_rates[high].next_rs; | |
925 | if (high == IWL_RATE_INVALID) | |
926 | break; | |
927 | if (rate_mask & (1 << high)) | |
928 | break; | |
8ca151b5 JB |
929 | } |
930 | ||
931 | return (high << 8) | low; | |
932 | } | |
933 | ||
e07be6d3 ES |
934 | static inline bool rs_rate_supported(struct iwl_lq_sta *lq_sta, |
935 | struct rs_rate *rate) | |
8ca151b5 | 936 | { |
e07be6d3 ES |
937 | return BIT(rate->index) & rs_get_supported_rates(lq_sta, rate); |
938 | } | |
939 | ||
940 | /* Get the next supported lower rate in the current column. | |
941 | * Return true if bottom rate in the current column was reached | |
942 | */ | |
943 | static bool rs_get_lower_rate_in_column(struct iwl_lq_sta *lq_sta, | |
944 | struct rs_rate *rate) | |
945 | { | |
946 | u8 low; | |
8ca151b5 | 947 | u16 high_low; |
e07be6d3 | 948 | u16 rate_mask; |
ae969afe | 949 | struct iwl_mvm *mvm = lq_sta->pers.drv; |
e07be6d3 ES |
950 | |
951 | rate_mask = rs_get_supported_rates(lq_sta, rate); | |
952 | high_low = rs_get_adjacent_rate(mvm, rate->index, rate_mask, | |
953 | rate->type); | |
954 | low = high_low & 0xff; | |
955 | ||
956 | /* Bottom rate of column reached */ | |
957 | if (low == IWL_RATE_INVALID) | |
958 | return true; | |
959 | ||
960 | rate->index = low; | |
961 | return false; | |
962 | } | |
963 | ||
964 | /* Get the next rate to use following a column downgrade */ | |
965 | static void rs_get_lower_rate_down_column(struct iwl_lq_sta *lq_sta, | |
966 | struct rs_rate *rate) | |
967 | { | |
ae969afe | 968 | struct iwl_mvm *mvm = lq_sta->pers.drv; |
8ca151b5 | 969 | |
e07be6d3 ES |
970 | if (is_legacy(rate)) { |
971 | /* No column to downgrade from Legacy */ | |
972 | return; | |
973 | } else if (is_siso(rate)) { | |
974 | /* Downgrade to Legacy if we were in SISO */ | |
8ca151b5 | 975 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
5aa33553 | 976 | rate->type = LQ_LEGACY_A; |
8ca151b5 | 977 | else |
5aa33553 | 978 | rate->type = LQ_LEGACY_G; |
8ca151b5 | 979 | |
a56db7d1 | 980 | rate->bw = RATE_MCS_CHAN_WIDTH_20; |
8ca151b5 | 981 | |
b800040d | 982 | WARN_ON_ONCE(rate->index < IWL_RATE_MCS_0_INDEX || |
e07be6d3 | 983 | rate->index > IWL_RATE_MCS_9_INDEX); |
8ca151b5 | 984 | |
e07be6d3 | 985 | rate->index = rs_ht_to_legacy[rate->index]; |
a3576ff2 | 986 | rate->ldpc = false; |
e07be6d3 ES |
987 | } else { |
988 | /* Downgrade to SISO with same MCS if in MIMO */ | |
989 | rate->type = is_vht_mimo2(rate) ? | |
990 | LQ_VHT_SISO : LQ_HT_SISO; | |
8ca151b5 JB |
991 | } |
992 | ||
e07be6d3 | 993 | if (num_of_ant(rate->ant) > 1) |
a0544272 | 994 | rate->ant = first_antenna(iwl_mvm_get_valid_tx_ant(mvm)); |
8ca151b5 | 995 | |
e07be6d3 ES |
996 | /* Relevant in both switching to SISO or Legacy */ |
997 | rate->sgi = false; | |
998 | ||
999 | if (!rs_rate_supported(lq_sta, rate)) | |
1000 | rs_get_lower_rate_in_column(lq_sta, rate); | |
8ca151b5 JB |
1001 | } |
1002 | ||
5aa33553 ES |
1003 | /* Simple function to compare two rate scale table types */ |
1004 | static inline bool rs_rate_match(struct rs_rate *a, | |
1005 | struct rs_rate *b) | |
8ca151b5 | 1006 | { |
d8bafeaf ES |
1007 | bool ant_match; |
1008 | ||
1009 | if (a->stbc) | |
1010 | ant_match = (b->ant == ANT_A || b->ant == ANT_B); | |
1011 | else | |
1012 | ant_match = (a->ant == b->ant); | |
1013 | ||
1014 | return (a->type == b->type) && (a->bw == b->bw) && (a->sgi == b->sgi) | |
1015 | && ant_match; | |
8ca151b5 JB |
1016 | } |
1017 | ||
d310e405 ES |
1018 | static u32 rs_ch_width_from_mac_flags(enum mac80211_rate_control_flags flags) |
1019 | { | |
1020 | if (flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
1021 | return RATE_MCS_CHAN_WIDTH_40; | |
1022 | else if (flags & IEEE80211_TX_RC_80_MHZ_WIDTH) | |
1023 | return RATE_MCS_CHAN_WIDTH_80; | |
1024 | else if (flags & IEEE80211_TX_RC_160_MHZ_WIDTH) | |
1025 | return RATE_MCS_CHAN_WIDTH_160; | |
1026 | ||
1027 | return RATE_MCS_CHAN_WIDTH_20; | |
1028 | } | |
1029 | ||
1ebc8f2e ES |
1030 | static u8 rs_get_tid(struct ieee80211_hdr *hdr) |
1031 | { | |
1032 | u8 tid = IWL_MAX_TID_COUNT; | |
1033 | ||
1034 | if (ieee80211_is_data_qos(hdr->frame_control)) { | |
1035 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
1036 | tid = qc[0] & 0xf; | |
1037 | } | |
1038 | ||
1039 | if (unlikely(tid > IWL_MAX_TID_COUNT)) | |
1040 | tid = IWL_MAX_TID_COUNT; | |
1041 | ||
1042 | return tid; | |
1043 | } | |
1044 | ||
1045 | void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
1046 | int tid, struct ieee80211_tx_info *info) | |
8ca151b5 JB |
1047 | { |
1048 | int legacy_success; | |
1049 | int retries; | |
5aa33553 | 1050 | int mac_index, i; |
8ca151b5 | 1051 | struct iwl_lq_cmd *table; |
8ca151b5 | 1052 | enum mac80211_rate_control_flags mac_flags; |
5aa33553 ES |
1053 | u32 ucode_rate; |
1054 | struct rs_rate rate; | |
8ca151b5 | 1055 | struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl; |
2fd647f8 | 1056 | u8 reduced_txp = (uintptr_t)info->status.status_driver_data[0]; |
1ebc8f2e ES |
1057 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
1058 | struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta; | |
8ca151b5 | 1059 | |
8ca151b5 JB |
1060 | /* Treat uninitialized rate scaling data same as non-existing. */ |
1061 | if (!lq_sta) { | |
1062 | IWL_DEBUG_RATE(mvm, "Station rate scaling not created yet.\n"); | |
1063 | return; | |
ae969afe | 1064 | } else if (!lq_sta->pers.drv) { |
8ca151b5 JB |
1065 | IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n"); |
1066 | return; | |
1067 | } | |
1068 | ||
8e96440e | 1069 | #ifdef CONFIG_MAC80211_DEBUGFS |
87d5e415 | 1070 | /* Disable last tx check if we are debugging with fixed rate */ |
ae969afe | 1071 | if (lq_sta->pers.dbg_fixed_rate) { |
87d5e415 ES |
1072 | IWL_DEBUG_RATE(mvm, "Fixed rate. avoid rate scaling\n"); |
1073 | return; | |
1074 | } | |
1075 | #endif | |
8ca151b5 JB |
1076 | /* This packet was aggregated but doesn't carry status info */ |
1077 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && | |
1078 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
1079 | return; | |
1080 | ||
1081 | /* | |
1082 | * Ignore this Tx frame response if its initial rate doesn't match | |
1083 | * that of latest Link Quality command. There may be stragglers | |
1084 | * from a previous Link Quality command, but we're no longer interested | |
1085 | * in those; they're either from the "active" mode while we're trying | |
1086 | * to check "search" mode, or a prior "search" mode after we've moved | |
1087 | * to a new "search" mode (which might become the new "active" mode). | |
1088 | */ | |
1089 | table = &lq_sta->lq; | |
5aa33553 ES |
1090 | ucode_rate = le32_to_cpu(table->rs_table[0]); |
1091 | rs_rate_from_ucode_rate(ucode_rate, info->band, &rate); | |
8ca151b5 | 1092 | if (info->band == IEEE80211_BAND_5GHZ) |
5aa33553 | 1093 | rate.index -= IWL_FIRST_OFDM_RATE; |
8ca151b5 JB |
1094 | mac_flags = info->status.rates[0].flags; |
1095 | mac_index = info->status.rates[0].idx; | |
1096 | /* For HT packets, map MCS to PLCP */ | |
1097 | if (mac_flags & IEEE80211_TX_RC_MCS) { | |
1098 | /* Remove # of streams */ | |
1099 | mac_index &= RATE_HT_MCS_RATE_CODE_MSK; | |
1100 | if (mac_index >= (IWL_RATE_9M_INDEX - IWL_FIRST_OFDM_RATE)) | |
1101 | mac_index++; | |
1102 | /* | |
1103 | * mac80211 HT index is always zero-indexed; we need to move | |
1104 | * HT OFDM rates after CCK rates in 2.4 GHz band | |
1105 | */ | |
1106 | if (info->band == IEEE80211_BAND_2GHZ) | |
1107 | mac_index += IWL_FIRST_OFDM_RATE; | |
d310e405 ES |
1108 | } else if (mac_flags & IEEE80211_TX_RC_VHT_MCS) { |
1109 | mac_index &= RATE_VHT_MCS_RATE_CODE_MSK; | |
1110 | if (mac_index >= (IWL_RATE_9M_INDEX - IWL_FIRST_OFDM_RATE)) | |
1111 | mac_index++; | |
8ca151b5 | 1112 | } |
d310e405 | 1113 | |
87d5e415 | 1114 | if (time_after(jiffies, |
834437da ES |
1115 | (unsigned long)(lq_sta->last_tx + |
1116 | (IWL_MVM_RS_IDLE_TIMEOUT * HZ)))) { | |
efad21d2 JB |
1117 | int t; |
1118 | ||
87d5e415 | 1119 | IWL_DEBUG_RATE(mvm, "Tx idle for too long. reinit rs\n"); |
efad21d2 JB |
1120 | for (t = 0; t < IWL_MAX_TID_COUNT; t++) |
1121 | ieee80211_stop_tx_ba_session(sta, t); | |
87d5e415 | 1122 | |
1ebc8f2e | 1123 | iwl_mvm_rs_rate_init(mvm, sta, info->band, false); |
87d5e415 ES |
1124 | return; |
1125 | } | |
1126 | lq_sta->last_tx = jiffies; | |
1127 | ||
8ca151b5 JB |
1128 | /* Here we actually compare this rate to the latest LQ command */ |
1129 | if ((mac_index < 0) || | |
5aa33553 ES |
1130 | (rate.sgi != !!(mac_flags & IEEE80211_TX_RC_SHORT_GI)) || |
1131 | (rate.bw != rs_ch_width_from_mac_flags(mac_flags)) || | |
1132 | (rate.ant != info->status.antenna) || | |
1133 | (!!(ucode_rate & RATE_MCS_HT_MSK) != | |
d310e405 | 1134 | !!(mac_flags & IEEE80211_TX_RC_MCS)) || |
5aa33553 | 1135 | (!!(ucode_rate & RATE_MCS_VHT_MSK) != |
d310e405 | 1136 | !!(mac_flags & IEEE80211_TX_RC_VHT_MCS)) || |
5aa33553 | 1137 | (!!(ucode_rate & RATE_HT_MCS_GF_MSK) != |
d310e405 | 1138 | !!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD)) || |
5aa33553 | 1139 | (rate.index != mac_index)) { |
8ca151b5 JB |
1140 | IWL_DEBUG_RATE(mvm, |
1141 | "initial rate %d does not match %d (0x%x)\n", | |
5aa33553 | 1142 | mac_index, rate.index, ucode_rate); |
8ca151b5 JB |
1143 | /* |
1144 | * Since rates mis-match, the last LQ command may have failed. | |
1145 | * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with | |
1146 | * ... driver. | |
1147 | */ | |
1148 | lq_sta->missed_rate_counter++; | |
834437da | 1149 | if (lq_sta->missed_rate_counter > IWL_MVM_RS_MISSED_RATE_MAX) { |
8ca151b5 | 1150 | lq_sta->missed_rate_counter = 0; |
b3b06a32 ES |
1151 | IWL_DEBUG_RATE(mvm, |
1152 | "Too many rates mismatch. Send sync LQ. rs_state %d\n", | |
1153 | lq_sta->rs_state); | |
9e680946 | 1154 | iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false); |
8ca151b5 JB |
1155 | } |
1156 | /* Regardless, ignore this status info for outdated rate */ | |
1157 | return; | |
1158 | } else | |
1159 | /* Rate did match, so reset the missed_rate_counter */ | |
1160 | lq_sta->missed_rate_counter = 0; | |
1161 | ||
26a2cc01 | 1162 | if (!lq_sta->search_better_tbl) { |
8ca151b5 JB |
1163 | curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1164 | other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
26a2cc01 | 1165 | } else { |
8ca151b5 JB |
1166 | curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); |
1167 | other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
26a2cc01 ES |
1168 | } |
1169 | ||
1170 | if (WARN_ON_ONCE(!rs_rate_match(&rate, &curr_tbl->rate))) { | |
8ca151b5 JB |
1171 | IWL_DEBUG_RATE(mvm, |
1172 | "Neither active nor search matches tx rate\n"); | |
1173 | tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
5aa33553 | 1174 | rs_dump_rate(mvm, &tmp_tbl->rate, "ACTIVE"); |
8ca151b5 | 1175 | tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); |
5aa33553 ES |
1176 | rs_dump_rate(mvm, &tmp_tbl->rate, "SEARCH"); |
1177 | rs_dump_rate(mvm, &rate, "ACTUAL"); | |
1178 | ||
8ca151b5 JB |
1179 | /* |
1180 | * no matching table found, let's by-pass the data collection | |
1181 | * and continue to perform rate scale to find the rate table | |
1182 | */ | |
1183 | rs_stay_in_table(lq_sta, true); | |
1184 | goto done; | |
1185 | } | |
1186 | ||
1187 | /* | |
1188 | * Updating the frame history depends on whether packets were | |
1189 | * aggregated. | |
1190 | * | |
1191 | * For aggregation, all packets were transmitted at the same rate, the | |
1192 | * first index into rate scale table. | |
1193 | */ | |
1194 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { | |
d6bda667 ES |
1195 | /* ampdu_ack_len = 0 marks no BA was received. In this case |
1196 | * treat it as a single frame loss as we don't want the success | |
1197 | * ratio to dip too quickly because a BA wasn't received | |
1198 | */ | |
1199 | if (info->status.ampdu_ack_len == 0) | |
1200 | info->status.ampdu_len = 1; | |
1201 | ||
5aa33553 ES |
1202 | ucode_rate = le32_to_cpu(table->rs_table[0]); |
1203 | rs_rate_from_ucode_rate(ucode_rate, info->band, &rate); | |
834437da | 1204 | rs_collect_tx_data(mvm, lq_sta, curr_tbl, rate.index, |
8ca151b5 | 1205 | info->status.ampdu_len, |
2fd647f8 EP |
1206 | info->status.ampdu_ack_len, |
1207 | reduced_txp); | |
8ca151b5 JB |
1208 | |
1209 | /* Update success/fail counts if not searching for new mode */ | |
b3b06a32 | 1210 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { |
8ca151b5 JB |
1211 | lq_sta->total_success += info->status.ampdu_ack_len; |
1212 | lq_sta->total_failed += (info->status.ampdu_len - | |
1213 | info->status.ampdu_ack_len); | |
1214 | } | |
1215 | } else { | |
1216 | /* | |
1217 | * For legacy, update frame history with for each Tx retry. | |
1218 | */ | |
1219 | retries = info->status.rates[0].count - 1; | |
1220 | /* HW doesn't send more than 15 retries */ | |
1221 | retries = min(retries, 15); | |
1222 | ||
1223 | /* The last transmission may have been successful */ | |
1224 | legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
1225 | /* Collect data for each rate used during failed TX attempts */ | |
1226 | for (i = 0; i <= retries; ++i) { | |
5aa33553 ES |
1227 | ucode_rate = le32_to_cpu(table->rs_table[i]); |
1228 | rs_rate_from_ucode_rate(ucode_rate, info->band, &rate); | |
8ca151b5 JB |
1229 | /* |
1230 | * Only collect stats if retried rate is in the same RS | |
1231 | * table as active/search. | |
1232 | */ | |
5aa33553 | 1233 | if (rs_rate_match(&rate, &curr_tbl->rate)) |
8ca151b5 | 1234 | tmp_tbl = curr_tbl; |
5aa33553 | 1235 | else if (rs_rate_match(&rate, &other_tbl->rate)) |
8ca151b5 | 1236 | tmp_tbl = other_tbl; |
4107dbd2 | 1237 | else |
8ca151b5 | 1238 | continue; |
4107dbd2 | 1239 | |
834437da | 1240 | rs_collect_tx_data(mvm, lq_sta, tmp_tbl, rate.index, 1, |
2fd647f8 EP |
1241 | i < retries ? 0 : legacy_success, |
1242 | reduced_txp); | |
8ca151b5 JB |
1243 | } |
1244 | ||
1245 | /* Update success/fail counts if not searching for new mode */ | |
b3b06a32 | 1246 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { |
8ca151b5 JB |
1247 | lq_sta->total_success += legacy_success; |
1248 | lq_sta->total_failed += retries + (1 - legacy_success); | |
1249 | } | |
1250 | } | |
1251 | /* The last TX rate is cached in lq_sta; it's set in if/else above */ | |
5aa33553 | 1252 | lq_sta->last_rate_n_flags = ucode_rate; |
2fd647f8 | 1253 | IWL_DEBUG_RATE(mvm, "reduced txpower: %d\n", reduced_txp); |
8ca151b5 JB |
1254 | done: |
1255 | /* See if there's a better rate or modulation mode to try. */ | |
8dfc2751 | 1256 | if (sta->supp_rates[info->band]) |
1ebc8f2e ES |
1257 | rs_rate_scale_perform(mvm, sta, lq_sta, tid); |
1258 | } | |
1259 | ||
1260 | /* | |
1261 | * mac80211 sends us Tx status | |
1262 | */ | |
1263 | static void rs_mac80211_tx_status(void *mvm_r, | |
1264 | struct ieee80211_supported_band *sband, | |
1265 | struct ieee80211_sta *sta, void *priv_sta, | |
1266 | struct sk_buff *skb) | |
1267 | { | |
1268 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1269 | struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_r; | |
1270 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
1271 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1272 | ||
1273 | if (!ieee80211_is_data(hdr->frame_control) || | |
1274 | info->flags & IEEE80211_TX_CTL_NO_ACK) | |
1275 | return; | |
1276 | ||
1277 | iwl_mvm_rs_tx_status(mvm, sta, rs_get_tid(hdr), info); | |
8ca151b5 JB |
1278 | } |
1279 | ||
1280 | /* | |
1281 | * Begin a period of staying with a selected modulation mode. | |
1282 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
1283 | * Set frame tx success limits according to legacy vs. high-throughput, | |
1284 | * and reset overall (spanning all rates) tx success history statistics. | |
1285 | * These control how long we stay using same modulation mode before | |
1286 | * searching for a new mode. | |
1287 | */ | |
1288 | static void rs_set_stay_in_table(struct iwl_mvm *mvm, u8 is_legacy, | |
1289 | struct iwl_lq_sta *lq_sta) | |
1290 | { | |
b3b06a32 ES |
1291 | IWL_DEBUG_RATE(mvm, "Moving to RS_STATE_STAY_IN_COLUMN\n"); |
1292 | lq_sta->rs_state = RS_STATE_STAY_IN_COLUMN; | |
8ca151b5 | 1293 | if (is_legacy) { |
834437da ES |
1294 | lq_sta->table_count_limit = IWL_MVM_RS_LEGACY_TABLE_COUNT; |
1295 | lq_sta->max_failure_limit = IWL_MVM_RS_LEGACY_FAILURE_LIMIT; | |
1296 | lq_sta->max_success_limit = IWL_MVM_RS_LEGACY_SUCCESS_LIMIT; | |
8ca151b5 | 1297 | } else { |
834437da ES |
1298 | lq_sta->table_count_limit = IWL_MVM_RS_NON_LEGACY_TABLE_COUNT; |
1299 | lq_sta->max_failure_limit = IWL_MVM_RS_NON_LEGACY_FAILURE_LIMIT; | |
1300 | lq_sta->max_success_limit = IWL_MVM_RS_NON_LEGACY_SUCCESS_LIMIT; | |
8ca151b5 JB |
1301 | } |
1302 | lq_sta->table_count = 0; | |
1303 | lq_sta->total_failed = 0; | |
1304 | lq_sta->total_success = 0; | |
1305 | lq_sta->flush_timer = jiffies; | |
b3b06a32 | 1306 | lq_sta->visited_columns = 0; |
8ca151b5 JB |
1307 | } |
1308 | ||
6a028d9a ES |
1309 | static inline int rs_get_max_rate_from_mask(unsigned long rate_mask) |
1310 | { | |
1311 | if (rate_mask) | |
1312 | return find_last_bit(&rate_mask, BITS_PER_LONG); | |
1313 | return IWL_RATE_INVALID; | |
1314 | } | |
1315 | ||
198266a3 ES |
1316 | static int rs_get_max_allowed_rate(struct iwl_lq_sta *lq_sta, |
1317 | const struct rs_tx_column *column) | |
1318 | { | |
1319 | switch (column->mode) { | |
1320 | case RS_LEGACY: | |
1321 | return lq_sta->max_legacy_rate_idx; | |
1322 | case RS_SISO: | |
1323 | return lq_sta->max_siso_rate_idx; | |
1324 | case RS_MIMO2: | |
1325 | return lq_sta->max_mimo2_rate_idx; | |
1326 | default: | |
1327 | WARN_ON_ONCE(1); | |
1328 | } | |
1329 | ||
1330 | return lq_sta->max_legacy_rate_idx; | |
1331 | } | |
1332 | ||
a34529e8 | 1333 | static const u16 *rs_get_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
198266a3 ES |
1334 | const struct rs_tx_column *column, |
1335 | u32 bw) | |
8ca151b5 JB |
1336 | { |
1337 | /* Used to choose among HT tables */ | |
a34529e8 | 1338 | const u16 (*ht_tbl_pointer)[IWL_RATE_COUNT]; |
8ca151b5 | 1339 | |
b3b06a32 ES |
1340 | if (WARN_ON_ONCE(column->mode != RS_LEGACY && |
1341 | column->mode != RS_SISO && | |
1342 | column->mode != RS_MIMO2)) | |
1343 | return expected_tpt_legacy; | |
8ca151b5 JB |
1344 | |
1345 | /* Legacy rates have only one table */ | |
b3b06a32 ES |
1346 | if (column->mode == RS_LEGACY) |
1347 | return expected_tpt_legacy; | |
8ca151b5 | 1348 | |
d310e405 | 1349 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; |
8ca151b5 | 1350 | /* Choose among many HT tables depending on number of streams |
d310e405 | 1351 | * (SISO/MIMO2), channel width (20/40/80), SGI, and aggregation |
8ca151b5 | 1352 | * status */ |
b3b06a32 ES |
1353 | if (column->mode == RS_SISO) { |
1354 | switch (bw) { | |
d310e405 ES |
1355 | case RATE_MCS_CHAN_WIDTH_20: |
1356 | ht_tbl_pointer = expected_tpt_siso_20MHz; | |
1357 | break; | |
1358 | case RATE_MCS_CHAN_WIDTH_40: | |
1359 | ht_tbl_pointer = expected_tpt_siso_40MHz; | |
1360 | break; | |
1361 | case RATE_MCS_CHAN_WIDTH_80: | |
1362 | ht_tbl_pointer = expected_tpt_siso_80MHz; | |
1363 | break; | |
1364 | default: | |
1365 | WARN_ON_ONCE(1); | |
1366 | } | |
b3b06a32 ES |
1367 | } else if (column->mode == RS_MIMO2) { |
1368 | switch (bw) { | |
d310e405 ES |
1369 | case RATE_MCS_CHAN_WIDTH_20: |
1370 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; | |
1371 | break; | |
1372 | case RATE_MCS_CHAN_WIDTH_40: | |
1373 | ht_tbl_pointer = expected_tpt_mimo2_40MHz; | |
1374 | break; | |
1375 | case RATE_MCS_CHAN_WIDTH_80: | |
1376 | ht_tbl_pointer = expected_tpt_mimo2_80MHz; | |
1377 | break; | |
1378 | default: | |
1379 | WARN_ON_ONCE(1); | |
1380 | } | |
1381 | } else { | |
1382 | WARN_ON_ONCE(1); | |
d972ab31 | 1383 | } |
8ca151b5 | 1384 | |
b3b06a32 ES |
1385 | if (!column->sgi && !lq_sta->is_agg) /* Normal */ |
1386 | return ht_tbl_pointer[0]; | |
1387 | else if (column->sgi && !lq_sta->is_agg) /* SGI */ | |
1388 | return ht_tbl_pointer[1]; | |
1389 | else if (!column->sgi && lq_sta->is_agg) /* AGG */ | |
1390 | return ht_tbl_pointer[2]; | |
8ca151b5 | 1391 | else /* AGG+SGI */ |
b3b06a32 ES |
1392 | return ht_tbl_pointer[3]; |
1393 | } | |
1394 | ||
1395 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, | |
1396 | struct iwl_scale_tbl_info *tbl) | |
1397 | { | |
1398 | struct rs_rate *rate = &tbl->rate; | |
1399 | const struct rs_tx_column *column = &rs_tx_columns[tbl->column]; | |
1400 | ||
1401 | tbl->expected_tpt = rs_get_expected_tpt_table(lq_sta, column, rate->bw); | |
8ca151b5 JB |
1402 | } |
1403 | ||
8ca151b5 JB |
1404 | static s32 rs_get_best_rate(struct iwl_mvm *mvm, |
1405 | struct iwl_lq_sta *lq_sta, | |
1406 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
80763515 | 1407 | unsigned long rate_mask, s8 index) |
8ca151b5 | 1408 | { |
8ca151b5 JB |
1409 | struct iwl_scale_tbl_info *active_tbl = |
1410 | &(lq_sta->lq_info[lq_sta->active_tbl]); | |
80763515 ES |
1411 | s32 success_ratio = active_tbl->win[index].success_ratio; |
1412 | u16 expected_current_tpt = active_tbl->expected_tpt[index]; | |
a34529e8 | 1413 | const u16 *tpt_tbl = tbl->expected_tpt; |
8ca151b5 | 1414 | u16 high_low; |
80763515 ES |
1415 | u32 target_tpt; |
1416 | int rate_idx; | |
8ca151b5 | 1417 | |
834437da | 1418 | if (success_ratio > IWL_MVM_RS_SR_NO_DECREASE) { |
80763515 ES |
1419 | target_tpt = 100 * expected_current_tpt; |
1420 | IWL_DEBUG_RATE(mvm, | |
1421 | "SR %d high. Find rate exceeding EXPECTED_CURRENT %d\n", | |
1422 | success_ratio, target_tpt); | |
1423 | } else { | |
1424 | target_tpt = lq_sta->last_tpt; | |
1425 | IWL_DEBUG_RATE(mvm, | |
1426 | "SR %d not thag good. Find rate exceeding ACTUAL_TPT %d\n", | |
1427 | success_ratio, target_tpt); | |
1428 | } | |
8ca151b5 | 1429 | |
80763515 | 1430 | rate_idx = find_first_bit(&rate_mask, BITS_PER_LONG); |
8ca151b5 | 1431 | |
80763515 ES |
1432 | while (rate_idx != IWL_RATE_INVALID) { |
1433 | if (target_tpt < (100 * tpt_tbl[rate_idx])) | |
1434 | break; | |
8ca151b5 | 1435 | |
80763515 ES |
1436 | high_low = rs_get_adjacent_rate(mvm, rate_idx, rate_mask, |
1437 | tbl->rate.type); | |
8ca151b5 | 1438 | |
80763515 | 1439 | rate_idx = (high_low >> 8) & 0xff; |
8ca151b5 JB |
1440 | } |
1441 | ||
80763515 ES |
1442 | IWL_DEBUG_RATE(mvm, "Best rate found %d target_tp %d expected_new %d\n", |
1443 | rate_idx, target_tpt, | |
1444 | rate_idx != IWL_RATE_INVALID ? | |
1445 | 100 * tpt_tbl[rate_idx] : IWL_INVALID_VALUE); | |
1446 | ||
1447 | return rate_idx; | |
8ca151b5 JB |
1448 | } |
1449 | ||
5aa33553 | 1450 | static u32 rs_bw_from_sta_bw(struct ieee80211_sta *sta) |
d310e405 ES |
1451 | { |
1452 | if (sta->bandwidth >= IEEE80211_STA_RX_BW_80) | |
5aa33553 | 1453 | return RATE_MCS_CHAN_WIDTH_80; |
d310e405 | 1454 | else if (sta->bandwidth >= IEEE80211_STA_RX_BW_40) |
5aa33553 ES |
1455 | return RATE_MCS_CHAN_WIDTH_40; |
1456 | ||
1457 | return RATE_MCS_CHAN_WIDTH_20; | |
d310e405 ES |
1458 | } |
1459 | ||
8ca151b5 JB |
1460 | /* |
1461 | * Check whether we should continue using same modulation mode, or | |
1462 | * begin search for a new mode, based on: | |
1463 | * 1) # tx successes or failures while using this mode | |
1464 | * 2) # times calling this function | |
1465 | * 3) elapsed time in this mode (not used, for now) | |
1466 | */ | |
1467 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search) | |
1468 | { | |
1469 | struct iwl_scale_tbl_info *tbl; | |
8ca151b5 JB |
1470 | int active_tbl; |
1471 | int flush_interval_passed = 0; | |
1472 | struct iwl_mvm *mvm; | |
1473 | ||
ae969afe | 1474 | mvm = lq_sta->pers.drv; |
8ca151b5 JB |
1475 | active_tbl = lq_sta->active_tbl; |
1476 | ||
1477 | tbl = &(lq_sta->lq_info[active_tbl]); | |
1478 | ||
1479 | /* If we've been disallowing search, see if we should now allow it */ | |
b3b06a32 | 1480 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { |
8ca151b5 JB |
1481 | /* Elapsed time using current modulation mode */ |
1482 | if (lq_sta->flush_timer) | |
1483 | flush_interval_passed = | |
1484 | time_after(jiffies, | |
1485 | (unsigned long)(lq_sta->flush_timer + | |
834437da | 1486 | (IWL_MVM_RS_STAY_IN_COLUMN_TIMEOUT * HZ))); |
8ca151b5 JB |
1487 | |
1488 | /* | |
1489 | * Check if we should allow search for new modulation mode. | |
1490 | * If many frames have failed or succeeded, or we've used | |
1491 | * this same modulation for a long time, allow search, and | |
1492 | * reset history stats that keep track of whether we should | |
1493 | * allow a new search. Also (below) reset all bitmaps and | |
1494 | * stats in active history. | |
1495 | */ | |
1496 | if (force_search || | |
1497 | (lq_sta->total_failed > lq_sta->max_failure_limit) || | |
1498 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1499 | ((!lq_sta->search_better_tbl) && | |
1500 | (lq_sta->flush_timer) && (flush_interval_passed))) { | |
1501 | IWL_DEBUG_RATE(mvm, | |
1502 | "LQ: stay is expired %d %d %d\n", | |
1503 | lq_sta->total_failed, | |
1504 | lq_sta->total_success, | |
1505 | flush_interval_passed); | |
1506 | ||
1507 | /* Allow search for new mode */ | |
b3b06a32 ES |
1508 | lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_STARTED; |
1509 | IWL_DEBUG_RATE(mvm, | |
1510 | "Moving to RS_STATE_SEARCH_CYCLE_STARTED\n"); | |
8ca151b5 JB |
1511 | lq_sta->total_failed = 0; |
1512 | lq_sta->total_success = 0; | |
1513 | lq_sta->flush_timer = 0; | |
b3b06a32 ES |
1514 | /* mark the current column as visited */ |
1515 | lq_sta->visited_columns = BIT(tbl->column); | |
8ca151b5 JB |
1516 | /* |
1517 | * Else if we've used this modulation mode enough repetitions | |
1518 | * (regardless of elapsed time or success/failure), reset | |
1519 | * history bitmaps and rate-specific stats for all rates in | |
1520 | * active table. | |
1521 | */ | |
1522 | } else { | |
1523 | lq_sta->table_count++; | |
1524 | if (lq_sta->table_count >= | |
1525 | lq_sta->table_count_limit) { | |
1526 | lq_sta->table_count = 0; | |
1527 | ||
1528 | IWL_DEBUG_RATE(mvm, | |
1529 | "LQ: stay in table clear win\n"); | |
b804eeb6 | 1530 | rs_rate_scale_clear_tbl_windows(mvm, tbl); |
8ca151b5 JB |
1531 | } |
1532 | } | |
1533 | ||
1534 | /* If transitioning to allow "search", reset all history | |
1535 | * bitmaps and stats in active table (this will become the new | |
1536 | * "search" table). */ | |
b3b06a32 | 1537 | if (lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED) { |
b804eeb6 | 1538 | rs_rate_scale_clear_tbl_windows(mvm, tbl); |
8ca151b5 JB |
1539 | } |
1540 | } | |
1541 | } | |
1542 | ||
1543 | /* | |
1544 | * setup rate table in uCode | |
1545 | */ | |
1546 | static void rs_update_rate_tbl(struct iwl_mvm *mvm, | |
9145d151 | 1547 | struct ieee80211_sta *sta, |
8ca151b5 | 1548 | struct iwl_lq_sta *lq_sta, |
5aa33553 | 1549 | struct rs_rate *rate) |
8ca151b5 | 1550 | { |
8fc7c58c | 1551 | rs_fill_lq_cmd(mvm, sta, lq_sta, rate); |
9e680946 | 1552 | iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false); |
8ca151b5 JB |
1553 | } |
1554 | ||
b3b06a32 ES |
1555 | static enum rs_column rs_get_next_column(struct iwl_mvm *mvm, |
1556 | struct iwl_lq_sta *lq_sta, | |
1557 | struct ieee80211_sta *sta, | |
1558 | struct iwl_scale_tbl_info *tbl) | |
1559 | { | |
198266a3 | 1560 | int i, j, max_rate; |
b3b06a32 ES |
1561 | enum rs_column next_col_id; |
1562 | const struct rs_tx_column *curr_col = &rs_tx_columns[tbl->column]; | |
1563 | const struct rs_tx_column *next_col; | |
1564 | allow_column_func_t allow_func; | |
a0544272 | 1565 | u8 valid_ants = iwl_mvm_get_valid_tx_ant(mvm); |
a34529e8 | 1566 | const u16 *expected_tpt_tbl; |
198266a3 | 1567 | u16 tpt, max_expected_tpt; |
b3b06a32 ES |
1568 | |
1569 | for (i = 0; i < MAX_NEXT_COLUMNS; i++) { | |
1570 | next_col_id = curr_col->next_columns[i]; | |
1571 | ||
1572 | if (next_col_id == RS_COLUMN_INVALID) | |
1573 | continue; | |
1574 | ||
1575 | if (lq_sta->visited_columns & BIT(next_col_id)) { | |
1576 | IWL_DEBUG_RATE(mvm, "Skip already visited column %d\n", | |
1577 | next_col_id); | |
1578 | continue; | |
1579 | } | |
1580 | ||
1581 | next_col = &rs_tx_columns[next_col_id]; | |
1582 | ||
1583 | if (!rs_is_valid_ant(valid_ants, next_col->ant)) { | |
1584 | IWL_DEBUG_RATE(mvm, | |
1585 | "Skip column %d as ANT config isn't supported by chip. valid_ants 0x%x column ant 0x%x\n", | |
1586 | next_col_id, valid_ants, next_col->ant); | |
1587 | continue; | |
1588 | } | |
1589 | ||
1590 | for (j = 0; j < MAX_COLUMN_CHECKS; j++) { | |
1591 | allow_func = next_col->checks[j]; | |
1592 | if (allow_func && !allow_func(mvm, sta, tbl)) | |
1593 | break; | |
1594 | } | |
1595 | ||
1596 | if (j != MAX_COLUMN_CHECKS) { | |
1597 | IWL_DEBUG_RATE(mvm, | |
1598 | "Skip column %d: not allowed (check %d failed)\n", | |
1599 | next_col_id, j); | |
1600 | ||
1601 | continue; | |
1602 | } | |
1603 | ||
1604 | tpt = lq_sta->last_tpt / 100; | |
1605 | expected_tpt_tbl = rs_get_expected_tpt_table(lq_sta, next_col, | |
049e0c33 | 1606 | rs_bw_from_sta_bw(sta)); |
b3b06a32 ES |
1607 | if (WARN_ON_ONCE(!expected_tpt_tbl)) |
1608 | continue; | |
1609 | ||
198266a3 | 1610 | max_rate = rs_get_max_allowed_rate(lq_sta, next_col); |
6a028d9a ES |
1611 | if (max_rate == IWL_RATE_INVALID) { |
1612 | IWL_DEBUG_RATE(mvm, | |
1613 | "Skip column %d: no rate is allowed in this column\n", | |
1614 | next_col_id); | |
198266a3 | 1615 | continue; |
6a028d9a | 1616 | } |
b3b06a32 | 1617 | |
198266a3 | 1618 | max_expected_tpt = expected_tpt_tbl[max_rate]; |
b3b06a32 ES |
1619 | if (tpt >= max_expected_tpt) { |
1620 | IWL_DEBUG_RATE(mvm, | |
1621 | "Skip column %d: can't beat current TPT. Max expected %d current %d\n", | |
1622 | next_col_id, max_expected_tpt, tpt); | |
1623 | continue; | |
1624 | } | |
1625 | ||
198266a3 ES |
1626 | IWL_DEBUG_RATE(mvm, |
1627 | "Found potential column %d. Max expected %d current %d\n", | |
1628 | next_col_id, max_expected_tpt, tpt); | |
b3b06a32 ES |
1629 | break; |
1630 | } | |
1631 | ||
1632 | if (i == MAX_NEXT_COLUMNS) | |
1633 | return RS_COLUMN_INVALID; | |
1634 | ||
b3b06a32 ES |
1635 | return next_col_id; |
1636 | } | |
1637 | ||
1638 | static int rs_switch_to_column(struct iwl_mvm *mvm, | |
1639 | struct iwl_lq_sta *lq_sta, | |
1640 | struct ieee80211_sta *sta, | |
1641 | enum rs_column col_id) | |
1642 | { | |
1643 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1644 | struct iwl_scale_tbl_info *search_tbl = | |
1645 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1646 | struct rs_rate *rate = &search_tbl->rate; | |
1647 | const struct rs_tx_column *column = &rs_tx_columns[col_id]; | |
1648 | const struct rs_tx_column *curr_column = &rs_tx_columns[tbl->column]; | |
1649 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1650 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
80763515 | 1651 | unsigned long rate_mask = 0; |
b3b06a32 ES |
1652 | u32 rate_idx = 0; |
1653 | ||
1654 | memcpy(search_tbl, tbl, sz); | |
1655 | ||
1656 | rate->sgi = column->sgi; | |
1657 | rate->ant = column->ant; | |
1658 | ||
1659 | if (column->mode == RS_LEGACY) { | |
1660 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
1661 | rate->type = LQ_LEGACY_A; | |
1662 | else | |
1663 | rate->type = LQ_LEGACY_G; | |
1664 | ||
d8bafeaf ES |
1665 | rate->bw = RATE_MCS_CHAN_WIDTH_20; |
1666 | rate->ldpc = false; | |
b3b06a32 ES |
1667 | rate_mask = lq_sta->active_legacy_rate; |
1668 | } else if (column->mode == RS_SISO) { | |
1669 | rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO; | |
1670 | rate_mask = lq_sta->active_siso_rate; | |
1671 | } else if (column->mode == RS_MIMO2) { | |
1672 | rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2; | |
1673 | rate_mask = lq_sta->active_mimo2_rate; | |
1674 | } else { | |
1675 | WARN_ON_ONCE("Bad column mode"); | |
1676 | } | |
1677 | ||
d8bafeaf ES |
1678 | if (column->mode != RS_LEGACY) { |
1679 | rate->bw = rs_bw_from_sta_bw(sta); | |
1680 | rate->ldpc = lq_sta->ldpc; | |
1681 | } | |
1682 | ||
b3b06a32 ES |
1683 | search_tbl->column = col_id; |
1684 | rs_set_expected_tpt_table(lq_sta, search_tbl); | |
1685 | ||
75d3e2d6 ES |
1686 | lq_sta->visited_columns |= BIT(col_id); |
1687 | ||
b3b06a32 ES |
1688 | /* Get the best matching rate if we're changing modes. e.g. |
1689 | * SISO->MIMO, LEGACY->SISO, MIMO->SISO | |
1690 | */ | |
1691 | if (curr_column->mode != column->mode) { | |
1692 | rate_idx = rs_get_best_rate(mvm, lq_sta, search_tbl, | |
1693 | rate_mask, rate->index); | |
1694 | ||
1695 | if ((rate_idx == IWL_RATE_INVALID) || | |
1696 | !(BIT(rate_idx) & rate_mask)) { | |
1697 | IWL_DEBUG_RATE(mvm, | |
1698 | "can not switch with index %d" | |
80763515 | 1699 | " rate mask %lx\n", |
b3b06a32 ES |
1700 | rate_idx, rate_mask); |
1701 | ||
1702 | goto err; | |
1703 | } | |
1704 | ||
1705 | rate->index = rate_idx; | |
1706 | } | |
1707 | ||
b3b06a32 ES |
1708 | IWL_DEBUG_RATE(mvm, "Switched to column %d: Index %d\n", |
1709 | col_id, rate->index); | |
1710 | ||
b3b06a32 ES |
1711 | return 0; |
1712 | ||
1713 | err: | |
1714 | rate->type = LQ_NONE; | |
1715 | return -1; | |
1716 | } | |
1717 | ||
4e4b815c ES |
1718 | static enum rs_action rs_get_rate_action(struct iwl_mvm *mvm, |
1719 | struct iwl_scale_tbl_info *tbl, | |
1720 | s32 sr, int low, int high, | |
1721 | int current_tpt, | |
1722 | int low_tpt, int high_tpt) | |
1723 | { | |
1724 | enum rs_action action = RS_ACTION_STAY; | |
1725 | ||
834437da ES |
1726 | if ((sr <= RS_PERCENT(IWL_MVM_RS_SR_FORCE_DECREASE)) || |
1727 | (current_tpt == 0)) { | |
4e4b815c | 1728 | IWL_DEBUG_RATE(mvm, |
e53839eb ES |
1729 | "Decrease rate because of low SR\n"); |
1730 | return RS_ACTION_DOWNSCALE; | |
4e4b815c ES |
1731 | } |
1732 | ||
e53839eb ES |
1733 | if ((low_tpt == IWL_INVALID_VALUE) && |
1734 | (high_tpt == IWL_INVALID_VALUE) && | |
1735 | (high != IWL_RATE_INVALID)) { | |
4e4b815c | 1736 | IWL_DEBUG_RATE(mvm, |
e53839eb ES |
1737 | "No data about high/low rates. Increase rate\n"); |
1738 | return RS_ACTION_UPSCALE; | |
4e4b815c ES |
1739 | } |
1740 | ||
e53839eb ES |
1741 | if ((high_tpt == IWL_INVALID_VALUE) && |
1742 | (high != IWL_RATE_INVALID) && | |
1743 | (low_tpt != IWL_INVALID_VALUE) && | |
1744 | (low_tpt < current_tpt)) { | |
1745 | IWL_DEBUG_RATE(mvm, | |
1746 | "No data about high rate and low rate is worse. Increase rate\n"); | |
1747 | return RS_ACTION_UPSCALE; | |
1748 | } | |
4e4b815c | 1749 | |
e53839eb ES |
1750 | if ((high_tpt != IWL_INVALID_VALUE) && |
1751 | (high_tpt > current_tpt)) { | |
1752 | IWL_DEBUG_RATE(mvm, | |
1753 | "Higher rate is better. Increate rate\n"); | |
1754 | return RS_ACTION_UPSCALE; | |
4e4b815c ES |
1755 | } |
1756 | ||
e53839eb ES |
1757 | if ((low_tpt != IWL_INVALID_VALUE) && |
1758 | (high_tpt != IWL_INVALID_VALUE) && | |
1759 | (low_tpt < current_tpt) && | |
1760 | (high_tpt < current_tpt)) { | |
4e4b815c | 1761 | IWL_DEBUG_RATE(mvm, |
e53839eb ES |
1762 | "Both high and low are worse. Maintain rate\n"); |
1763 | return RS_ACTION_STAY; | |
1764 | } | |
1765 | ||
1766 | if ((low_tpt != IWL_INVALID_VALUE) && | |
1767 | (low_tpt > current_tpt)) { | |
1768 | IWL_DEBUG_RATE(mvm, | |
1769 | "Lower rate is better\n"); | |
1770 | action = RS_ACTION_DOWNSCALE; | |
1771 | goto out; | |
1772 | } | |
1773 | ||
1774 | if ((low_tpt == IWL_INVALID_VALUE) && | |
1775 | (low != IWL_RATE_INVALID)) { | |
4e4b815c | 1776 | IWL_DEBUG_RATE(mvm, |
e53839eb ES |
1777 | "No data about lower rate\n"); |
1778 | action = RS_ACTION_DOWNSCALE; | |
1779 | goto out; | |
1780 | } | |
1781 | ||
1782 | IWL_DEBUG_RATE(mvm, "Maintain rate\n"); | |
1783 | ||
1784 | out: | |
1785 | if ((action == RS_ACTION_DOWNSCALE) && (low != IWL_RATE_INVALID)) { | |
834437da | 1786 | if (sr >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) { |
e53839eb ES |
1787 | IWL_DEBUG_RATE(mvm, |
1788 | "SR is above NO DECREASE. Avoid downscale\n"); | |
1789 | action = RS_ACTION_STAY; | |
1790 | } else if (current_tpt > (100 * tbl->expected_tpt[low])) { | |
1791 | IWL_DEBUG_RATE(mvm, | |
1792 | "Current TPT is higher than max expected in low rate. Avoid downscale\n"); | |
1793 | action = RS_ACTION_STAY; | |
1794 | } else { | |
1795 | IWL_DEBUG_RATE(mvm, "Decrease rate\n"); | |
1796 | } | |
4e4b815c ES |
1797 | } |
1798 | ||
1799 | return action; | |
1800 | } | |
b3b06a32 | 1801 | |
d8bafeaf ES |
1802 | static bool rs_stbc_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
1803 | struct iwl_lq_sta *lq_sta) | |
1804 | { | |
d8bafeaf ES |
1805 | /* Our chip supports Tx STBC and the peer is an HT/VHT STA which |
1806 | * supports STBC of at least 1*SS | |
1807 | */ | |
1808 | if (!lq_sta->stbc) | |
1809 | return false; | |
1810 | ||
d8bafeaf ES |
1811 | if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) |
1812 | return false; | |
1813 | ||
1814 | return true; | |
1815 | } | |
1816 | ||
2fd647f8 EP |
1817 | static void rs_get_adjacent_txp(struct iwl_mvm *mvm, int index, |
1818 | int *weaker, int *stronger) | |
1819 | { | |
834437da | 1820 | *weaker = index + IWL_MVM_RS_TPC_TX_POWER_STEP; |
2fd647f8 EP |
1821 | if (*weaker > TPC_MAX_REDUCTION) |
1822 | *weaker = TPC_INVALID; | |
1823 | ||
834437da | 1824 | *stronger = index - IWL_MVM_RS_TPC_TX_POWER_STEP; |
2fd647f8 EP |
1825 | if (*stronger < 0) |
1826 | *stronger = TPC_INVALID; | |
1827 | } | |
1828 | ||
1e9551de ES |
1829 | static bool rs_tpc_allowed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
1830 | struct rs_rate *rate, enum ieee80211_band band) | |
2fd647f8 EP |
1831 | { |
1832 | int index = rate->index; | |
1e9551de ES |
1833 | bool cam = (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM); |
1834 | bool sta_ps_disabled = (vif->type == NL80211_IFTYPE_STATION && | |
1835 | !vif->bss_conf.ps); | |
2fd647f8 | 1836 | |
1e9551de ES |
1837 | IWL_DEBUG_RATE(mvm, "cam: %d sta_ps_disabled %d\n", |
1838 | cam, sta_ps_disabled); | |
2fd647f8 EP |
1839 | /* |
1840 | * allow tpc only if power management is enabled, or bt coex | |
1841 | * activity grade allows it and we are on 2.4Ghz. | |
1842 | */ | |
1e9551de | 1843 | if ((cam || sta_ps_disabled) && |
2fd647f8 EP |
1844 | !iwl_mvm_bt_coex_is_tpc_allowed(mvm, band)) |
1845 | return false; | |
1846 | ||
1847 | IWL_DEBUG_RATE(mvm, "check rate, table type: %d\n", rate->type); | |
1848 | if (is_legacy(rate)) | |
1849 | return index == IWL_RATE_54M_INDEX; | |
1850 | if (is_ht(rate)) | |
1851 | return index == IWL_RATE_MCS_7_INDEX; | |
1852 | if (is_vht(rate)) | |
1853 | return index == IWL_RATE_MCS_7_INDEX || | |
1854 | index == IWL_RATE_MCS_8_INDEX || | |
1855 | index == IWL_RATE_MCS_9_INDEX; | |
1856 | ||
1857 | WARN_ON_ONCE(1); | |
1858 | return false; | |
1859 | } | |
1860 | ||
1861 | enum tpc_action { | |
1862 | TPC_ACTION_STAY, | |
1863 | TPC_ACTION_DECREASE, | |
1864 | TPC_ACTION_INCREASE, | |
1865 | TPC_ACTION_NO_RESTIRCTION, | |
1866 | }; | |
1867 | ||
1868 | static enum tpc_action rs_get_tpc_action(struct iwl_mvm *mvm, | |
1869 | s32 sr, int weak, int strong, | |
1870 | int current_tpt, | |
1871 | int weak_tpt, int strong_tpt) | |
1872 | { | |
1873 | /* stay until we have valid tpt */ | |
1874 | if (current_tpt == IWL_INVALID_VALUE) { | |
1875 | IWL_DEBUG_RATE(mvm, "no current tpt. stay.\n"); | |
1876 | return TPC_ACTION_STAY; | |
1877 | } | |
1878 | ||
1879 | /* Too many failures, increase txp */ | |
834437da ES |
1880 | if (sr <= RS_PERCENT(IWL_MVM_RS_TPC_SR_FORCE_INCREASE) || |
1881 | current_tpt == 0) { | |
2fd647f8 EP |
1882 | IWL_DEBUG_RATE(mvm, "increase txp because of weak SR\n"); |
1883 | return TPC_ACTION_NO_RESTIRCTION; | |
1884 | } | |
1885 | ||
1886 | /* try decreasing first if applicable */ | |
1887 | if (weak != TPC_INVALID) { | |
1888 | if (weak_tpt == IWL_INVALID_VALUE && | |
1889 | (strong_tpt == IWL_INVALID_VALUE || | |
1890 | current_tpt >= strong_tpt)) { | |
1891 | IWL_DEBUG_RATE(mvm, | |
1892 | "no weak txp measurement. decrease txp\n"); | |
1893 | return TPC_ACTION_DECREASE; | |
1894 | } | |
1895 | ||
1896 | if (weak_tpt > current_tpt) { | |
1897 | IWL_DEBUG_RATE(mvm, | |
1898 | "lower txp has better tpt. decrease txp\n"); | |
1899 | return TPC_ACTION_DECREASE; | |
1900 | } | |
1901 | } | |
1902 | ||
1903 | /* next, increase if needed */ | |
834437da ES |
1904 | if (sr < RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) && |
1905 | strong != TPC_INVALID) { | |
2fd647f8 EP |
1906 | if (weak_tpt == IWL_INVALID_VALUE && |
1907 | strong_tpt != IWL_INVALID_VALUE && | |
1908 | current_tpt < strong_tpt) { | |
1909 | IWL_DEBUG_RATE(mvm, | |
1910 | "higher txp has better tpt. increase txp\n"); | |
1911 | return TPC_ACTION_INCREASE; | |
1912 | } | |
1913 | ||
1914 | if (weak_tpt < current_tpt && | |
1915 | (strong_tpt == IWL_INVALID_VALUE || | |
1916 | strong_tpt > current_tpt)) { | |
1917 | IWL_DEBUG_RATE(mvm, | |
1918 | "lower txp has worse tpt. increase txp\n"); | |
1919 | return TPC_ACTION_INCREASE; | |
1920 | } | |
1921 | } | |
1922 | ||
1923 | IWL_DEBUG_RATE(mvm, "no need to increase or decrease txp - stay\n"); | |
1924 | return TPC_ACTION_STAY; | |
1925 | } | |
1926 | ||
1927 | static bool rs_tpc_perform(struct iwl_mvm *mvm, | |
1928 | struct ieee80211_sta *sta, | |
1929 | struct iwl_lq_sta *lq_sta, | |
1930 | struct iwl_scale_tbl_info *tbl) | |
1931 | { | |
9d8ce6af | 1932 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); |
2fd647f8 EP |
1933 | struct ieee80211_vif *vif = mvm_sta->vif; |
1934 | struct ieee80211_chanctx_conf *chanctx_conf; | |
1935 | enum ieee80211_band band; | |
1936 | struct iwl_rate_scale_data *window; | |
1937 | struct rs_rate *rate = &tbl->rate; | |
1938 | enum tpc_action action; | |
1939 | s32 sr; | |
1940 | u8 cur = lq_sta->lq.reduced_tpc; | |
1941 | int current_tpt; | |
1942 | int weak, strong; | |
1943 | int weak_tpt = IWL_INVALID_VALUE, strong_tpt = IWL_INVALID_VALUE; | |
1944 | ||
9a75b3df | 1945 | #ifdef CONFIG_MAC80211_DEBUGFS |
ae969afe | 1946 | if (lq_sta->pers.dbg_fixed_txp_reduction <= TPC_MAX_REDUCTION) { |
3c6acb61 | 1947 | IWL_DEBUG_RATE(mvm, "fixed tpc: %d\n", |
ae969afe EP |
1948 | lq_sta->pers.dbg_fixed_txp_reduction); |
1949 | lq_sta->lq.reduced_tpc = lq_sta->pers.dbg_fixed_txp_reduction; | |
1950 | return cur != lq_sta->pers.dbg_fixed_txp_reduction; | |
9a75b3df EP |
1951 | } |
1952 | #endif | |
1953 | ||
2fd647f8 EP |
1954 | rcu_read_lock(); |
1955 | chanctx_conf = rcu_dereference(vif->chanctx_conf); | |
1956 | if (WARN_ON(!chanctx_conf)) | |
1957 | band = IEEE80211_NUM_BANDS; | |
1958 | else | |
1959 | band = chanctx_conf->def.chan->band; | |
1960 | rcu_read_unlock(); | |
1961 | ||
1e9551de | 1962 | if (!rs_tpc_allowed(mvm, vif, rate, band)) { |
2fd647f8 | 1963 | IWL_DEBUG_RATE(mvm, |
3c6acb61 | 1964 | "tpc is not allowed. remove txp restrictions\n"); |
2fd647f8 EP |
1965 | lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION; |
1966 | return cur != TPC_NO_REDUCTION; | |
1967 | } | |
1968 | ||
1969 | rs_get_adjacent_txp(mvm, cur, &weak, &strong); | |
1970 | ||
1971 | /* Collect measured throughputs for current and adjacent rates */ | |
1972 | window = tbl->tpc_win; | |
1973 | sr = window[cur].success_ratio; | |
1974 | current_tpt = window[cur].average_tpt; | |
1975 | if (weak != TPC_INVALID) | |
1976 | weak_tpt = window[weak].average_tpt; | |
1977 | if (strong != TPC_INVALID) | |
1978 | strong_tpt = window[strong].average_tpt; | |
1979 | ||
1980 | IWL_DEBUG_RATE(mvm, | |
1981 | "(TPC: %d): cur_tpt %d SR %d weak %d strong %d weak_tpt %d strong_tpt %d\n", | |
1982 | cur, current_tpt, sr, weak, strong, | |
1983 | weak_tpt, strong_tpt); | |
1984 | ||
1985 | action = rs_get_tpc_action(mvm, sr, weak, strong, | |
1986 | current_tpt, weak_tpt, strong_tpt); | |
1987 | ||
1988 | /* override actions if we are on the edge */ | |
1989 | if (weak == TPC_INVALID && action == TPC_ACTION_DECREASE) { | |
3c6acb61 | 1990 | IWL_DEBUG_RATE(mvm, "already in lowest txp, stay\n"); |
2fd647f8 EP |
1991 | action = TPC_ACTION_STAY; |
1992 | } else if (strong == TPC_INVALID && | |
1993 | (action == TPC_ACTION_INCREASE || | |
1994 | action == TPC_ACTION_NO_RESTIRCTION)) { | |
3c6acb61 | 1995 | IWL_DEBUG_RATE(mvm, "already in highest txp, stay\n"); |
2fd647f8 EP |
1996 | action = TPC_ACTION_STAY; |
1997 | } | |
1998 | ||
1999 | switch (action) { | |
2000 | case TPC_ACTION_DECREASE: | |
2001 | lq_sta->lq.reduced_tpc = weak; | |
2002 | return true; | |
2003 | case TPC_ACTION_INCREASE: | |
2004 | lq_sta->lq.reduced_tpc = strong; | |
2005 | return true; | |
2006 | case TPC_ACTION_NO_RESTIRCTION: | |
2007 | lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION; | |
2008 | return true; | |
2009 | case TPC_ACTION_STAY: | |
2010 | /* do nothing */ | |
2011 | break; | |
2012 | } | |
2013 | return false; | |
2014 | } | |
2015 | ||
8ca151b5 JB |
2016 | /* |
2017 | * Do rate scaling and search for new modulation mode. | |
2018 | */ | |
2019 | static void rs_rate_scale_perform(struct iwl_mvm *mvm, | |
8ca151b5 | 2020 | struct ieee80211_sta *sta, |
1ebc8f2e ES |
2021 | struct iwl_lq_sta *lq_sta, |
2022 | int tid) | |
8ca151b5 | 2023 | { |
8ca151b5 JB |
2024 | int low = IWL_RATE_INVALID; |
2025 | int high = IWL_RATE_INVALID; | |
2026 | int index; | |
8ca151b5 JB |
2027 | struct iwl_rate_scale_data *window = NULL; |
2028 | int current_tpt = IWL_INVALID_VALUE; | |
2029 | int low_tpt = IWL_INVALID_VALUE; | |
2030 | int high_tpt = IWL_INVALID_VALUE; | |
2031 | u32 fail_count; | |
4e4b815c | 2032 | enum rs_action scale_action = RS_ACTION_STAY; |
8ca151b5 JB |
2033 | u16 rate_mask; |
2034 | u8 update_lq = 0; | |
2035 | struct iwl_scale_tbl_info *tbl, *tbl1; | |
8ca151b5 JB |
2036 | u8 active_tbl = 0; |
2037 | u8 done_search = 0; | |
2038 | u16 high_low; | |
2039 | s32 sr; | |
9d015a03 | 2040 | u8 prev_agg = lq_sta->is_agg; |
9d8ce6af | 2041 | struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 | 2042 | struct iwl_mvm_tid_data *tid_data; |
5aa33553 | 2043 | struct rs_rate *rate; |
8ca151b5 | 2044 | |
efed6640 | 2045 | lq_sta->is_agg = !!sta_priv->agg_tids; |
8ca151b5 JB |
2046 | |
2047 | /* | |
2048 | * Select rate-scale / modulation-mode table to work with in | |
2049 | * the rest of this function: "search" if searching for better | |
2050 | * modulation mode, or "active" if doing rate scaling within a mode. | |
2051 | */ | |
2052 | if (!lq_sta->search_better_tbl) | |
2053 | active_tbl = lq_sta->active_tbl; | |
2054 | else | |
2055 | active_tbl = 1 - lq_sta->active_tbl; | |
2056 | ||
2057 | tbl = &(lq_sta->lq_info[active_tbl]); | |
5aa33553 | 2058 | rate = &tbl->rate; |
8ca151b5 | 2059 | |
9d015a03 ES |
2060 | if (prev_agg != lq_sta->is_agg) { |
2061 | IWL_DEBUG_RATE(mvm, | |
2062 | "Aggregation changed: prev %d current %d. Update expected TPT table\n", | |
2063 | prev_agg, lq_sta->is_agg); | |
2064 | rs_set_expected_tpt_table(lq_sta, tbl); | |
b804eeb6 | 2065 | rs_rate_scale_clear_tbl_windows(mvm, tbl); |
9d015a03 ES |
2066 | } |
2067 | ||
8ca151b5 JB |
2068 | /* current tx rate */ |
2069 | index = lq_sta->last_txrate_idx; | |
2070 | ||
8ca151b5 | 2071 | /* rates available for this association, and for modulation mode */ |
a8ff14f5 | 2072 | rate_mask = rs_get_supported_rates(lq_sta, rate); |
8ca151b5 | 2073 | |
ca6f38ff | 2074 | if (!(BIT(index) & rate_mask)) { |
8ca151b5 JB |
2075 | IWL_ERR(mvm, "Current Rate is not valid\n"); |
2076 | if (lq_sta->search_better_tbl) { | |
2077 | /* revert to active table if search table is not valid*/ | |
5aa33553 | 2078 | rate->type = LQ_NONE; |
8ca151b5 JB |
2079 | lq_sta->search_better_tbl = 0; |
2080 | tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
5aa33553 | 2081 | rs_update_rate_tbl(mvm, sta, lq_sta, &tbl->rate); |
8ca151b5 JB |
2082 | } |
2083 | return; | |
2084 | } | |
2085 | ||
2086 | /* Get expected throughput table and history window for current rate */ | |
2087 | if (!tbl->expected_tpt) { | |
2088 | IWL_ERR(mvm, "tbl->expected_tpt is NULL\n"); | |
2089 | return; | |
2090 | } | |
2091 | ||
2536e7c3 | 2092 | /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */ |
8ca151b5 JB |
2093 | window = &(tbl->win[index]); |
2094 | ||
2095 | /* | |
2096 | * If there is not enough history to calculate actual average | |
2097 | * throughput, keep analyzing results of more tx frames, without | |
2098 | * changing rate or mode (bypass most of the rest of this function). | |
2099 | * Set up new rate table in uCode only if old rate is not supported | |
2100 | * in current association (use new rate found above). | |
2101 | */ | |
2102 | fail_count = window->counter - window->success_counter; | |
834437da ES |
2103 | if ((fail_count < IWL_MVM_RS_RATE_MIN_FAILURE_TH) && |
2104 | (window->success_counter < IWL_MVM_RS_RATE_MIN_SUCCESS_TH)) { | |
8ca151b5 | 2105 | IWL_DEBUG_RATE(mvm, |
4d30ee82 | 2106 | "(%s: %d): Test Window: succ %d total %d\n", |
5aa33553 | 2107 | rs_pretty_lq_type(rate->type), |
4d30ee82 | 2108 | index, window->success_counter, window->counter); |
8ca151b5 JB |
2109 | |
2110 | /* Can't calculate this yet; not enough history */ | |
2111 | window->average_tpt = IWL_INVALID_VALUE; | |
2112 | ||
2113 | /* Should we stay with this modulation mode, | |
2114 | * or search for a new one? */ | |
2115 | rs_stay_in_table(lq_sta, false); | |
2116 | ||
2117 | goto out; | |
2118 | } | |
2119 | /* Else we have enough samples; calculate estimate of | |
2120 | * actual average throughput */ | |
2121 | if (window->average_tpt != ((window->success_ratio * | |
2122 | tbl->expected_tpt[index] + 64) / 128)) { | |
8ca151b5 JB |
2123 | window->average_tpt = ((window->success_ratio * |
2124 | tbl->expected_tpt[index] + 64) / 128); | |
2125 | } | |
2126 | ||
2127 | /* If we are searching for better modulation mode, check success. */ | |
2128 | if (lq_sta->search_better_tbl) { | |
2129 | /* If good success, continue using the "search" mode; | |
2130 | * no need to send new link quality command, since we're | |
2131 | * continuing to use the setup that we've been trying. */ | |
2132 | if (window->average_tpt > lq_sta->last_tpt) { | |
2133 | IWL_DEBUG_RATE(mvm, | |
4d30ee82 ES |
2134 | "SWITCHING TO NEW TABLE SR: %d " |
2135 | "cur-tpt %d old-tpt %d\n", | |
8ca151b5 JB |
2136 | window->success_ratio, |
2137 | window->average_tpt, | |
2138 | lq_sta->last_tpt); | |
2139 | ||
8ca151b5 JB |
2140 | /* Swap tables; "search" becomes "active" */ |
2141 | lq_sta->active_tbl = active_tbl; | |
2142 | current_tpt = window->average_tpt; | |
2143 | /* Else poor success; go back to mode in "active" table */ | |
2144 | } else { | |
2145 | IWL_DEBUG_RATE(mvm, | |
4d30ee82 ES |
2146 | "GOING BACK TO THE OLD TABLE: SR %d " |
2147 | "cur-tpt %d old-tpt %d\n", | |
8ca151b5 JB |
2148 | window->success_ratio, |
2149 | window->average_tpt, | |
2150 | lq_sta->last_tpt); | |
2151 | ||
2152 | /* Nullify "search" table */ | |
5aa33553 | 2153 | rate->type = LQ_NONE; |
8ca151b5 JB |
2154 | |
2155 | /* Revert to "active" table */ | |
2156 | active_tbl = lq_sta->active_tbl; | |
2157 | tbl = &(lq_sta->lq_info[active_tbl]); | |
2158 | ||
2159 | /* Revert to "active" rate and throughput info */ | |
8fc7c58c | 2160 | index = tbl->rate.index; |
8ca151b5 JB |
2161 | current_tpt = lq_sta->last_tpt; |
2162 | ||
2163 | /* Need to set up a new rate table in uCode */ | |
2164 | update_lq = 1; | |
2165 | } | |
2166 | ||
2167 | /* Either way, we've made a decision; modulation mode | |
2168 | * search is done, allow rate adjustment next time. */ | |
2169 | lq_sta->search_better_tbl = 0; | |
2170 | done_search = 1; /* Don't switch modes below! */ | |
2171 | goto lq_update; | |
2172 | } | |
2173 | ||
2174 | /* (Else) not in search of better modulation mode, try for better | |
2175 | * starting rate, while staying in this mode. */ | |
ca6f38ff | 2176 | high_low = rs_get_adjacent_rate(mvm, index, rate_mask, rate->type); |
8ca151b5 JB |
2177 | low = high_low & 0xff; |
2178 | high = (high_low >> 8) & 0xff; | |
2179 | ||
2536e7c3 | 2180 | /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */ |
8ca151b5 JB |
2181 | |
2182 | sr = window->success_ratio; | |
2183 | ||
2184 | /* Collect measured throughputs for current and adjacent rates */ | |
2185 | current_tpt = window->average_tpt; | |
2186 | if (low != IWL_RATE_INVALID) | |
2187 | low_tpt = tbl->win[low].average_tpt; | |
2188 | if (high != IWL_RATE_INVALID) | |
2189 | high_tpt = tbl->win[high].average_tpt; | |
2190 | ||
4d30ee82 ES |
2191 | IWL_DEBUG_RATE(mvm, |
2192 | "(%s: %d): cur_tpt %d SR %d low %d high %d low_tpt %d high_tpt %d\n", | |
5aa33553 ES |
2193 | rs_pretty_lq_type(rate->type), index, current_tpt, sr, |
2194 | low, high, low_tpt, high_tpt); | |
4d30ee82 | 2195 | |
4e4b815c ES |
2196 | scale_action = rs_get_rate_action(mvm, tbl, sr, low, high, |
2197 | current_tpt, low_tpt, high_tpt); | |
8ca151b5 | 2198 | |
393b9e5b | 2199 | /* Force a search in case BT doesn't like us being in MIMO */ |
5aa33553 | 2200 | if (is_mimo(rate) && |
393b9e5b | 2201 | !iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) { |
4d30ee82 ES |
2202 | IWL_DEBUG_RATE(mvm, |
2203 | "BT Coex forbids MIMO. Search for new config\n"); | |
36946ce6 EG |
2204 | rs_stay_in_table(lq_sta, true); |
2205 | goto lq_update; | |
2206 | } | |
2207 | ||
8ca151b5 | 2208 | switch (scale_action) { |
4e4b815c | 2209 | case RS_ACTION_DOWNSCALE: |
8ca151b5 JB |
2210 | /* Decrease starting rate, update uCode's rate table */ |
2211 | if (low != IWL_RATE_INVALID) { | |
2212 | update_lq = 1; | |
2213 | index = low; | |
4d30ee82 ES |
2214 | } else { |
2215 | IWL_DEBUG_RATE(mvm, | |
2216 | "At the bottom rate. Can't decrease\n"); | |
8ca151b5 JB |
2217 | } |
2218 | ||
2219 | break; | |
4e4b815c | 2220 | case RS_ACTION_UPSCALE: |
8ca151b5 JB |
2221 | /* Increase starting rate, update uCode's rate table */ |
2222 | if (high != IWL_RATE_INVALID) { | |
2223 | update_lq = 1; | |
2224 | index = high; | |
4d30ee82 ES |
2225 | } else { |
2226 | IWL_DEBUG_RATE(mvm, | |
2227 | "At the top rate. Can't increase\n"); | |
8ca151b5 JB |
2228 | } |
2229 | ||
2230 | break; | |
4e4b815c | 2231 | case RS_ACTION_STAY: |
8ca151b5 | 2232 | /* No change */ |
e6c8d602 ES |
2233 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) |
2234 | update_lq = rs_tpc_perform(mvm, sta, lq_sta, tbl); | |
2fd647f8 | 2235 | break; |
8ca151b5 JB |
2236 | default: |
2237 | break; | |
2238 | } | |
2239 | ||
8ca151b5 JB |
2240 | lq_update: |
2241 | /* Replace uCode's rate table for the destination station. */ | |
5aa33553 ES |
2242 | if (update_lq) { |
2243 | tbl->rate.index = index; | |
2244 | rs_update_rate_tbl(mvm, sta, lq_sta, &tbl->rate); | |
2245 | } | |
8ca151b5 JB |
2246 | |
2247 | rs_stay_in_table(lq_sta, false); | |
2248 | ||
2249 | /* | |
2250 | * Search for new modulation mode if we're: | |
2251 | * 1) Not changing rates right now | |
2252 | * 2) Not just finishing up a search | |
2253 | * 3) Allowing a new search | |
2254 | */ | |
2255 | if (!update_lq && !done_search && | |
b3b06a32 ES |
2256 | lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED |
2257 | && window->counter) { | |
2258 | enum rs_column next_column; | |
2259 | ||
8ca151b5 JB |
2260 | /* Save current throughput to compare with "search" throughput*/ |
2261 | lq_sta->last_tpt = current_tpt; | |
2262 | ||
4d30ee82 | 2263 | IWL_DEBUG_RATE(mvm, |
b3b06a32 ES |
2264 | "Start Search: update_lq %d done_search %d rs_state %d win->counter %d\n", |
2265 | update_lq, done_search, lq_sta->rs_state, | |
4d30ee82 | 2266 | window->counter); |
b3b06a32 ES |
2267 | |
2268 | next_column = rs_get_next_column(mvm, lq_sta, sta, tbl); | |
2269 | if (next_column != RS_COLUMN_INVALID) { | |
2270 | int ret = rs_switch_to_column(mvm, lq_sta, sta, | |
2271 | next_column); | |
2272 | if (!ret) | |
2273 | lq_sta->search_better_tbl = 1; | |
2274 | } else { | |
2275 | IWL_DEBUG_RATE(mvm, | |
2276 | "No more columns to explore in search cycle. Go to RS_STATE_SEARCH_CYCLE_ENDED\n"); | |
2277 | lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_ENDED; | |
2278 | } | |
8ca151b5 JB |
2279 | |
2280 | /* If new "search" mode was selected, set up in uCode table */ | |
2281 | if (lq_sta->search_better_tbl) { | |
2282 | /* Access the "search" table, clear its history. */ | |
2283 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
b804eeb6 | 2284 | rs_rate_scale_clear_tbl_windows(mvm, tbl); |
8ca151b5 JB |
2285 | |
2286 | /* Use new "search" start rate */ | |
8fc7c58c | 2287 | index = tbl->rate.index; |
8ca151b5 | 2288 | |
b3b06a32 ES |
2289 | rs_dump_rate(mvm, &tbl->rate, |
2290 | "Switch to SEARCH TABLE:"); | |
8fc7c58c | 2291 | rs_fill_lq_cmd(mvm, sta, lq_sta, &tbl->rate); |
9e680946 | 2292 | iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false); |
8ca151b5 JB |
2293 | } else { |
2294 | done_search = 1; | |
2295 | } | |
2296 | } | |
2297 | ||
b3b06a32 | 2298 | if (done_search && lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_ENDED) { |
8ca151b5 JB |
2299 | /* If the "active" (non-search) mode was legacy, |
2300 | * and we've tried switching antennas, | |
2301 | * but we haven't been able to try HT modes (not available), | |
2302 | * stay with best antenna legacy modulation for a while | |
2303 | * before next round of mode comparisons. */ | |
2304 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
fd7dbee5 | 2305 | if (is_legacy(&tbl1->rate)) { |
8ca151b5 | 2306 | IWL_DEBUG_RATE(mvm, "LQ: STAY in legacy table\n"); |
fd7dbee5 ES |
2307 | |
2308 | if (tid != IWL_MAX_TID_COUNT) { | |
2309 | tid_data = &sta_priv->tid_data[tid]; | |
2310 | if (tid_data->state != IWL_AGG_OFF) { | |
2311 | IWL_DEBUG_RATE(mvm, | |
2312 | "Stop aggregation on tid %d\n", | |
2313 | tid); | |
2314 | ieee80211_stop_tx_ba_session(sta, tid); | |
2315 | } | |
2316 | } | |
8ca151b5 | 2317 | rs_set_stay_in_table(mvm, 1, lq_sta); |
b3b06a32 | 2318 | } else { |
8ca151b5 JB |
2319 | /* If we're in an HT mode, and all 3 mode switch actions |
2320 | * have been tried and compared, stay in this best modulation | |
2321 | * mode for a while before next round of mode comparisons. */ | |
8ca151b5 JB |
2322 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
2323 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2324 | (tid != IWL_MAX_TID_COUNT)) { | |
2325 | tid_data = &sta_priv->tid_data[tid]; | |
2326 | if (tid_data->state == IWL_AGG_OFF) { | |
2327 | IWL_DEBUG_RATE(mvm, | |
2328 | "try to aggregate tid %d\n", | |
2329 | tid); | |
2330 | rs_tl_turn_on_agg(mvm, tid, | |
2331 | lq_sta, sta); | |
2332 | } | |
2333 | } | |
2334 | rs_set_stay_in_table(mvm, 0, lq_sta); | |
2335 | } | |
2336 | } | |
2337 | ||
2338 | out: | |
8ca151b5 JB |
2339 | lq_sta->last_txrate_idx = index; |
2340 | } | |
2341 | ||
361dbec8 ES |
2342 | struct rs_init_rate_info { |
2343 | s8 rssi; | |
2344 | u8 rate_idx; | |
2345 | }; | |
2346 | ||
2347 | static const struct rs_init_rate_info rs_init_rates_24ghz[] = { | |
2348 | { -60, IWL_RATE_54M_INDEX }, | |
2349 | { -64, IWL_RATE_48M_INDEX }, | |
2350 | { -68, IWL_RATE_36M_INDEX }, | |
2351 | { -80, IWL_RATE_24M_INDEX }, | |
2352 | { -84, IWL_RATE_18M_INDEX }, | |
2353 | { -85, IWL_RATE_12M_INDEX }, | |
2354 | { -86, IWL_RATE_11M_INDEX }, | |
2355 | { -88, IWL_RATE_5M_INDEX }, | |
2356 | { -90, IWL_RATE_2M_INDEX }, | |
2357 | { S8_MIN, IWL_RATE_1M_INDEX }, | |
2358 | }; | |
2359 | ||
2360 | static const struct rs_init_rate_info rs_init_rates_5ghz[] = { | |
2361 | { -60, IWL_RATE_54M_INDEX }, | |
2362 | { -64, IWL_RATE_48M_INDEX }, | |
2363 | { -72, IWL_RATE_36M_INDEX }, | |
2364 | { -80, IWL_RATE_24M_INDEX }, | |
2365 | { -84, IWL_RATE_18M_INDEX }, | |
2366 | { -85, IWL_RATE_12M_INDEX }, | |
2367 | { -87, IWL_RATE_9M_INDEX }, | |
2368 | { S8_MIN, IWL_RATE_6M_INDEX }, | |
2369 | }; | |
2370 | ||
2371 | /* Choose an initial legacy rate and antenna to use based on the RSSI | |
2372 | * of last Rx | |
2373 | */ | |
2374 | static void rs_get_initial_rate(struct iwl_mvm *mvm, | |
2375 | struct iwl_lq_sta *lq_sta, | |
2376 | enum ieee80211_band band, | |
2377 | struct rs_rate *rate) | |
2378 | { | |
2379 | int i, nentries; | |
2380 | s8 best_rssi = S8_MIN; | |
2381 | u8 best_ant = ANT_NONE; | |
a0544272 | 2382 | u8 valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm); |
361dbec8 ES |
2383 | const struct rs_init_rate_info *initial_rates; |
2384 | ||
2385 | for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) { | |
2386 | if (!(lq_sta->pers.chains & BIT(i))) | |
2387 | continue; | |
2388 | ||
2389 | if (lq_sta->pers.chain_signal[i] > best_rssi) { | |
2390 | best_rssi = lq_sta->pers.chain_signal[i]; | |
2391 | best_ant = BIT(i); | |
2392 | } | |
2393 | } | |
2394 | ||
2395 | IWL_DEBUG_RATE(mvm, "Best ANT: %s Best RSSI: %d\n", | |
2396 | rs_pretty_ant(best_ant), best_rssi); | |
2397 | ||
2398 | if (best_ant != ANT_A && best_ant != ANT_B) | |
2399 | rate->ant = first_antenna(valid_tx_ant); | |
2400 | else | |
2401 | rate->ant = best_ant; | |
2402 | ||
2403 | rate->sgi = false; | |
2404 | rate->ldpc = false; | |
2405 | rate->bw = RATE_MCS_CHAN_WIDTH_20; | |
2406 | ||
2407 | rate->index = find_first_bit(&lq_sta->active_legacy_rate, | |
2408 | BITS_PER_LONG); | |
2409 | ||
2410 | if (band == IEEE80211_BAND_5GHZ) { | |
2411 | rate->type = LQ_LEGACY_A; | |
2412 | initial_rates = rs_init_rates_5ghz; | |
2413 | nentries = ARRAY_SIZE(rs_init_rates_5ghz); | |
2414 | } else { | |
2415 | rate->type = LQ_LEGACY_G; | |
2416 | initial_rates = rs_init_rates_24ghz; | |
2417 | nentries = ARRAY_SIZE(rs_init_rates_24ghz); | |
2418 | } | |
2419 | ||
2420 | if (IWL_MVM_RS_RSSI_BASED_INIT_RATE) { | |
2421 | for (i = 0; i < nentries; i++) { | |
2422 | int rate_idx = initial_rates[i].rate_idx; | |
2423 | if ((best_rssi >= initial_rates[i].rssi) && | |
2424 | (BIT(rate_idx) & lq_sta->active_legacy_rate)) { | |
2425 | rate->index = rate_idx; | |
2426 | break; | |
2427 | } | |
2428 | } | |
2429 | } | |
2430 | ||
2431 | IWL_DEBUG_RATE(mvm, "rate_idx %d ANT %s\n", rate->index, | |
2432 | rs_pretty_ant(rate->ant)); | |
2433 | } | |
2434 | ||
2435 | /* Save info about RSSI of last Rx */ | |
2436 | void rs_update_last_rssi(struct iwl_mvm *mvm, | |
2437 | struct iwl_lq_sta *lq_sta, | |
2438 | struct ieee80211_rx_status *rx_status) | |
2439 | { | |
2440 | lq_sta->pers.chains = rx_status->chains; | |
2441 | lq_sta->pers.chain_signal[0] = rx_status->chain_signal[0]; | |
2442 | lq_sta->pers.chain_signal[1] = rx_status->chain_signal[1]; | |
2443 | lq_sta->pers.chain_signal[2] = rx_status->chain_signal[2]; | |
2444 | } | |
2445 | ||
8ca151b5 JB |
2446 | /** |
2447 | * rs_initialize_lq - Initialize a station's hardware rate table | |
2448 | * | |
2449 | * The uCode's station table contains a table of fallback rates | |
2450 | * for automatic fallback during transmission. | |
2451 | * | |
2452 | * NOTE: This sets up a default set of values. These will be replaced later | |
2453 | * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of | |
2454 | * rc80211_simple. | |
2455 | * | |
2456 | * NOTE: Run REPLY_ADD_STA command to set up station table entry, before | |
2457 | * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD, | |
2458 | * which requires station table entry to exist). | |
2459 | */ | |
2460 | static void rs_initialize_lq(struct iwl_mvm *mvm, | |
2461 | struct ieee80211_sta *sta, | |
2462 | struct iwl_lq_sta *lq_sta, | |
b87c2179 ES |
2463 | enum ieee80211_band band, |
2464 | bool init) | |
8ca151b5 JB |
2465 | { |
2466 | struct iwl_scale_tbl_info *tbl; | |
5aa33553 | 2467 | struct rs_rate *rate; |
8ca151b5 | 2468 | u8 active_tbl = 0; |
8ca151b5 JB |
2469 | |
2470 | if (!sta || !lq_sta) | |
2471 | return; | |
2472 | ||
8ca151b5 JB |
2473 | if (!lq_sta->search_better_tbl) |
2474 | active_tbl = lq_sta->active_tbl; | |
2475 | else | |
2476 | active_tbl = 1 - lq_sta->active_tbl; | |
2477 | ||
2478 | tbl = &(lq_sta->lq_info[active_tbl]); | |
5aa33553 | 2479 | rate = &tbl->rate; |
8ca151b5 | 2480 | |
361dbec8 ES |
2481 | rs_get_initial_rate(mvm, lq_sta, band, rate); |
2482 | lq_sta->last_txrate_idx = rate->index; | |
8ca151b5 | 2483 | |
b3b06a32 ES |
2484 | WARN_ON_ONCE(rate->ant != ANT_A && rate->ant != ANT_B); |
2485 | if (rate->ant == ANT_A) | |
2486 | tbl->column = RS_COLUMN_LEGACY_ANT_A; | |
2487 | else | |
2488 | tbl->column = RS_COLUMN_LEGACY_ANT_B; | |
2489 | ||
8ca151b5 | 2490 | rs_set_expected_tpt_table(lq_sta, tbl); |
80e9e5cd | 2491 | rs_fill_lq_cmd(mvm, sta, lq_sta, rate); |
8ca151b5 | 2492 | /* TODO restore station should remember the lq cmd */ |
b87c2179 | 2493 | iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, init); |
8ca151b5 JB |
2494 | } |
2495 | ||
2496 | static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta, | |
2497 | struct ieee80211_tx_rate_control *txrc) | |
2498 | { | |
2499 | struct sk_buff *skb = txrc->skb; | |
8ca151b5 JB |
2500 | struct iwl_op_mode *op_mode __maybe_unused = |
2501 | (struct iwl_op_mode *)mvm_r; | |
2502 | struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode); | |
2503 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2504 | struct iwl_lq_sta *lq_sta = mvm_sta; | |
8ca151b5 | 2505 | |
2536e7c3 | 2506 | /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */ |
8ca151b5 JB |
2507 | |
2508 | /* Treat uninitialized rate scaling data same as non-existing. */ | |
ae969afe | 2509 | if (lq_sta && !lq_sta->pers.drv) { |
8ca151b5 JB |
2510 | IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n"); |
2511 | mvm_sta = NULL; | |
2512 | } | |
2513 | ||
2514 | /* Send management frames and NO_ACK data using lowest rate. */ | |
2515 | if (rate_control_send_low(sta, mvm_sta, txrc)) | |
2516 | return; | |
2517 | ||
d310e405 ES |
2518 | iwl_mvm_hwrate_to_tx_rate(lq_sta->last_rate_n_flags, |
2519 | info->band, &info->control.rates[0]); | |
2520 | ||
622ebe99 | 2521 | info->control.rates[0].count = 1; |
8ca151b5 JB |
2522 | } |
2523 | ||
2524 | static void *rs_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta, | |
2525 | gfp_t gfp) | |
2526 | { | |
9d8ce6af | 2527 | struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta); |
ae969afe EP |
2528 | struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_rate; |
2529 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
2530 | struct iwl_lq_sta *lq_sta = &sta_priv->lq_sta; | |
8ca151b5 JB |
2531 | |
2532 | IWL_DEBUG_RATE(mvm, "create station rate scale window\n"); | |
2533 | ||
ae969afe EP |
2534 | lq_sta->pers.drv = mvm; |
2535 | #ifdef CONFIG_MAC80211_DEBUGFS | |
2536 | lq_sta->pers.dbg_fixed_rate = 0; | |
2537 | lq_sta->pers.dbg_fixed_txp_reduction = TPC_INVALID; | |
2538 | #endif | |
361dbec8 ES |
2539 | lq_sta->pers.chains = 0; |
2540 | memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal)); | |
ae969afe | 2541 | |
8ca151b5 JB |
2542 | return &sta_priv->lq_sta; |
2543 | } | |
2544 | ||
d310e405 ES |
2545 | static int rs_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap *vht_cap, |
2546 | int nss) | |
2547 | { | |
2548 | u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) & | |
2549 | (0x3 << (2 * (nss - 1))); | |
2550 | rx_mcs >>= (2 * (nss - 1)); | |
2551 | ||
2552 | if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_7) | |
2553 | return IWL_RATE_MCS_7_INDEX; | |
2554 | else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_8) | |
2555 | return IWL_RATE_MCS_8_INDEX; | |
2556 | else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_9) | |
2557 | return IWL_RATE_MCS_9_INDEX; | |
2558 | ||
2559 | WARN_ON_ONCE(rx_mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED); | |
2560 | return -1; | |
2561 | } | |
2562 | ||
750a1b45 ES |
2563 | static void rs_vht_set_enabled_rates(struct ieee80211_sta *sta, |
2564 | struct ieee80211_sta_vht_cap *vht_cap, | |
2565 | struct iwl_lq_sta *lq_sta) | |
2566 | { | |
2567 | int i; | |
2568 | int highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 1); | |
2569 | ||
2570 | if (highest_mcs >= IWL_RATE_MCS_0_INDEX) { | |
2571 | for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) { | |
2572 | if (i == IWL_RATE_9M_INDEX) | |
2573 | continue; | |
2574 | ||
271518ad ES |
2575 | /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */ |
2576 | if (i == IWL_RATE_MCS_9_INDEX && | |
2577 | sta->bandwidth == IEEE80211_STA_RX_BW_20) | |
2578 | continue; | |
2579 | ||
750a1b45 ES |
2580 | lq_sta->active_siso_rate |= BIT(i); |
2581 | } | |
2582 | } | |
2583 | ||
ecc90e79 ES |
2584 | if (sta->rx_nss < 2) |
2585 | return; | |
2586 | ||
750a1b45 ES |
2587 | highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 2); |
2588 | if (highest_mcs >= IWL_RATE_MCS_0_INDEX) { | |
2589 | for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) { | |
2590 | if (i == IWL_RATE_9M_INDEX) | |
2591 | continue; | |
2592 | ||
271518ad ES |
2593 | /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */ |
2594 | if (i == IWL_RATE_MCS_9_INDEX && | |
2595 | sta->bandwidth == IEEE80211_STA_RX_BW_20) | |
2596 | continue; | |
2597 | ||
750a1b45 ES |
2598 | lq_sta->active_mimo2_rate |= BIT(i); |
2599 | } | |
2600 | } | |
2601 | } | |
2602 | ||
5fc0f76c ES |
2603 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
2604 | static void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm, | |
2605 | struct iwl_mvm_frame_stats *stats) | |
2606 | { | |
2607 | spin_lock_bh(&mvm->drv_stats_lock); | |
2608 | memset(stats, 0, sizeof(*stats)); | |
2609 | spin_unlock_bh(&mvm->drv_stats_lock); | |
2610 | } | |
2611 | ||
2612 | void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm, | |
2613 | struct iwl_mvm_frame_stats *stats, | |
2614 | u32 rate, bool agg) | |
2615 | { | |
2616 | u8 nss = 0, mcs = 0; | |
2617 | ||
2618 | spin_lock(&mvm->drv_stats_lock); | |
2619 | ||
2620 | if (agg) | |
2621 | stats->agg_frames++; | |
2622 | ||
2623 | stats->success_frames++; | |
2624 | ||
2625 | switch (rate & RATE_MCS_CHAN_WIDTH_MSK) { | |
2626 | case RATE_MCS_CHAN_WIDTH_20: | |
2627 | stats->bw_20_frames++; | |
2628 | break; | |
2629 | case RATE_MCS_CHAN_WIDTH_40: | |
2630 | stats->bw_40_frames++; | |
2631 | break; | |
2632 | case RATE_MCS_CHAN_WIDTH_80: | |
2633 | stats->bw_80_frames++; | |
2634 | break; | |
2635 | default: | |
2636 | WARN_ONCE(1, "bad BW. rate 0x%x", rate); | |
2637 | } | |
2638 | ||
2639 | if (rate & RATE_MCS_HT_MSK) { | |
2640 | stats->ht_frames++; | |
2641 | mcs = rate & RATE_HT_MCS_RATE_CODE_MSK; | |
2642 | nss = ((rate & RATE_HT_MCS_NSS_MSK) >> RATE_HT_MCS_NSS_POS) + 1; | |
2643 | } else if (rate & RATE_MCS_VHT_MSK) { | |
2644 | stats->vht_frames++; | |
2645 | mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK; | |
2646 | nss = ((rate & RATE_VHT_MCS_NSS_MSK) >> | |
2647 | RATE_VHT_MCS_NSS_POS) + 1; | |
2648 | } else { | |
2649 | stats->legacy_frames++; | |
2650 | } | |
2651 | ||
2652 | if (nss == 1) | |
2653 | stats->siso_frames++; | |
2654 | else if (nss == 2) | |
2655 | stats->mimo2_frames++; | |
2656 | ||
2657 | if (rate & RATE_MCS_SGI_MSK) | |
2658 | stats->sgi_frames++; | |
2659 | else | |
2660 | stats->ngi_frames++; | |
2661 | ||
2662 | stats->last_rates[stats->last_frame_idx] = rate; | |
2663 | stats->last_frame_idx = (stats->last_frame_idx + 1) % | |
2664 | ARRAY_SIZE(stats->last_rates); | |
2665 | ||
2666 | spin_unlock(&mvm->drv_stats_lock); | |
2667 | } | |
2668 | #endif | |
2669 | ||
8ca151b5 JB |
2670 | /* |
2671 | * Called after adding a new station to initialize rate scaling | |
2672 | */ | |
2673 | void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
b87c2179 | 2674 | enum ieee80211_band band, bool init) |
8ca151b5 JB |
2675 | { |
2676 | int i, j; | |
2677 | struct ieee80211_hw *hw = mvm->hw; | |
2678 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; | |
d310e405 | 2679 | struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; |
9d8ce6af JB |
2680 | struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta); |
2681 | struct iwl_lq_sta *lq_sta = &sta_priv->lq_sta; | |
8ca151b5 JB |
2682 | struct ieee80211_supported_band *sband; |
2683 | unsigned long supp; /* must be unsigned long for for_each_set_bit */ | |
2684 | ||
ae969afe EP |
2685 | /* clear all non-persistent lq data */ |
2686 | memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers)); | |
b87c2179 | 2687 | |
8ca151b5 JB |
2688 | sband = hw->wiphy->bands[band]; |
2689 | ||
2690 | lq_sta->lq.sta_id = sta_priv->sta_id; | |
2691 | ||
2692 | for (j = 0; j < LQ_SIZE; j++) | |
b804eeb6 | 2693 | rs_rate_scale_clear_tbl_windows(mvm, &lq_sta->lq_info[j]); |
8ca151b5 JB |
2694 | |
2695 | lq_sta->flush_timer = 0; | |
87d5e415 | 2696 | lq_sta->last_tx = jiffies; |
8ca151b5 JB |
2697 | |
2698 | IWL_DEBUG_RATE(mvm, | |
2699 | "LQ: *** rate scale station global init for station %d ***\n", | |
2700 | sta_priv->sta_id); | |
2701 | /* TODO: what is a good starting rate for STA? About middle? Maybe not | |
2702 | * the lowest or the highest rate.. Could consider using RSSI from | |
2703 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2704 | * after assoc.. */ | |
2705 | ||
834437da | 2706 | lq_sta->missed_rate_counter = IWL_MVM_RS_MISSED_RATE_MAX; |
8ca151b5 JB |
2707 | lq_sta->band = sband->band; |
2708 | /* | |
2709 | * active legacy rates as per supported rates bitmap | |
2710 | */ | |
2711 | supp = sta->supp_rates[sband->band]; | |
2712 | lq_sta->active_legacy_rate = 0; | |
2713 | for_each_set_bit(i, &supp, BITS_PER_LONG) | |
2714 | lq_sta->active_legacy_rate |= BIT(sband->bitrates[i].hw_value); | |
2715 | ||
d310e405 | 2716 | /* TODO: should probably account for rx_highest for both HT/VHT */ |
2c59d80c ES |
2717 | if (!vht_cap || !vht_cap->vht_supported) |
2718 | rs_ht_init(mvm, sta, lq_sta, ht_cap); | |
2719 | else | |
2720 | rs_vht_init(mvm, sta, lq_sta, vht_cap); | |
8ca151b5 | 2721 | |
afe08e1c | 2722 | if (IWL_MVM_RS_DISABLE_P2P_MIMO && sta_priv->vif->p2p) |
dc574e52 ES |
2723 | lq_sta->active_mimo2_rate = 0; |
2724 | ||
6a028d9a ES |
2725 | lq_sta->max_legacy_rate_idx = |
2726 | rs_get_max_rate_from_mask(lq_sta->active_legacy_rate); | |
2727 | lq_sta->max_siso_rate_idx = | |
2728 | rs_get_max_rate_from_mask(lq_sta->active_siso_rate); | |
2729 | lq_sta->max_mimo2_rate_idx = | |
2730 | rs_get_max_rate_from_mask(lq_sta->active_mimo2_rate); | |
198266a3 | 2731 | |
a3576ff2 | 2732 | IWL_DEBUG_RATE(mvm, |
be77c29c | 2733 | "RATE MASK: LEGACY=%lX SISO=%lX MIMO2=%lX VHT=%d LDPC=%d STBC=%d\n", |
198266a3 | 2734 | lq_sta->active_legacy_rate, |
8ca151b5 | 2735 | lq_sta->active_siso_rate, |
d310e405 | 2736 | lq_sta->active_mimo2_rate, |
d8bafeaf | 2737 | lq_sta->is_vht, lq_sta->ldpc, lq_sta->stbc); |
198266a3 ES |
2738 | IWL_DEBUG_RATE(mvm, "MAX RATE: LEGACY=%d SISO=%d MIMO2=%d\n", |
2739 | lq_sta->max_legacy_rate_idx, | |
2740 | lq_sta->max_siso_rate_idx, | |
2741 | lq_sta->max_mimo2_rate_idx); | |
8ca151b5 JB |
2742 | |
2743 | /* These values will be overridden later */ | |
2744 | lq_sta->lq.single_stream_ant_msk = | |
a0544272 | 2745 | first_antenna(iwl_mvm_get_valid_tx_ant(mvm)); |
809bccfa | 2746 | lq_sta->lq.dual_stream_ant_msk = ANT_AB; |
8ca151b5 JB |
2747 | |
2748 | /* as default allow aggregation for all tids */ | |
2749 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
8ca151b5 | 2750 | lq_sta->is_agg = 0; |
5fc0f76c ES |
2751 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
2752 | iwl_mvm_reset_frame_stats(mvm, &mvm->drv_rx_stats); | |
2753 | #endif | |
b87c2179 ES |
2754 | rs_initialize_lq(mvm, sta, lq_sta, band, init); |
2755 | } | |
2756 | ||
2757 | static void rs_rate_update(void *mvm_r, | |
2758 | struct ieee80211_supported_band *sband, | |
2759 | struct cfg80211_chan_def *chandef, | |
2760 | struct ieee80211_sta *sta, void *priv_sta, | |
2761 | u32 changed) | |
2762 | { | |
2763 | u8 tid; | |
2764 | struct iwl_op_mode *op_mode = | |
2765 | (struct iwl_op_mode *)mvm_r; | |
2766 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
2767 | ||
2768 | /* Stop any ongoing aggregations as rs starts off assuming no agg */ | |
2769 | for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) | |
2770 | ieee80211_stop_tx_ba_session(sta, tid); | |
2771 | ||
2772 | iwl_mvm_rs_rate_init(mvm, sta, sband->band, false); | |
8ca151b5 JB |
2773 | } |
2774 | ||
8fc7c58c ES |
2775 | #ifdef CONFIG_MAC80211_DEBUGFS |
2776 | static void rs_build_rates_table_from_fixed(struct iwl_mvm *mvm, | |
2777 | struct iwl_lq_cmd *lq_cmd, | |
2778 | enum ieee80211_band band, | |
2779 | u32 ucode_rate) | |
2780 | { | |
2781 | struct rs_rate rate; | |
2782 | int i; | |
2783 | int num_rates = ARRAY_SIZE(lq_cmd->rs_table); | |
2784 | __le32 ucode_rate_le32 = cpu_to_le32(ucode_rate); | |
7ceb98a3 | 2785 | u8 ant = (ucode_rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS; |
8fc7c58c ES |
2786 | |
2787 | for (i = 0; i < num_rates; i++) | |
2788 | lq_cmd->rs_table[i] = ucode_rate_le32; | |
2789 | ||
2790 | rs_rate_from_ucode_rate(ucode_rate, band, &rate); | |
2791 | ||
2792 | if (is_mimo(&rate)) | |
2793 | lq_cmd->mimo_delim = num_rates - 1; | |
2794 | else | |
2795 | lq_cmd->mimo_delim = 0; | |
7ceb98a3 EG |
2796 | |
2797 | lq_cmd->reduced_tpc = 0; | |
2798 | ||
2799 | if (num_of_ant(ant) == 1) | |
2800 | lq_cmd->single_stream_ant_msk = ant; | |
2801 | ||
2802 | lq_cmd->agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF; | |
8fc7c58c ES |
2803 | } |
2804 | #endif /* CONFIG_MAC80211_DEBUGFS */ | |
2805 | ||
e07be6d3 ES |
2806 | static void rs_fill_rates_for_column(struct iwl_mvm *mvm, |
2807 | struct iwl_lq_sta *lq_sta, | |
2808 | struct rs_rate *rate, | |
2809 | __le32 *rs_table, int *rs_table_index, | |
2810 | int num_rates, int num_retries, | |
2811 | u8 valid_tx_ant, bool toggle_ant) | |
2812 | { | |
2813 | int i, j; | |
2814 | __le32 ucode_rate; | |
2815 | bool bottom_reached = false; | |
2816 | int prev_rate_idx = rate->index; | |
2817 | int end = LINK_QUAL_MAX_RETRY_NUM; | |
2818 | int index = *rs_table_index; | |
2819 | ||
2820 | for (i = 0; i < num_rates && index < end; i++) { | |
bd999318 ES |
2821 | for (j = 0; j < num_retries && index < end; j++, index++) { |
2822 | ucode_rate = cpu_to_le32(ucode_rate_from_rs_rate(mvm, | |
2823 | rate)); | |
e07be6d3 | 2824 | rs_table[index] = ucode_rate; |
bd999318 ES |
2825 | if (toggle_ant) |
2826 | rs_toggle_antenna(valid_tx_ant, rate); | |
2827 | } | |
e07be6d3 ES |
2828 | |
2829 | prev_rate_idx = rate->index; | |
2830 | bottom_reached = rs_get_lower_rate_in_column(lq_sta, rate); | |
2831 | if (bottom_reached && !is_legacy(rate)) | |
2832 | break; | |
2833 | } | |
2834 | ||
bd999318 | 2835 | if (!bottom_reached && !is_legacy(rate)) |
e07be6d3 ES |
2836 | rate->index = prev_rate_idx; |
2837 | ||
2838 | *rs_table_index = index; | |
2839 | } | |
2840 | ||
2841 | /* Building the rate table is non trivial. When we're in MIMO2/VHT/80Mhz/SGI | |
2842 | * column the rate table should look like this: | |
2843 | * | |
2844 | * rate[0] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI | |
2845 | * rate[1] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI | |
2846 | * rate[2] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI | |
2847 | * rate[3] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI | |
2848 | * rate[4] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI | |
2849 | * rate[5] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI | |
2850 | * rate[6] 0x4005007 VHT | ANT: A BW: 80Mhz MCS: 7 NSS: 1 NGI | |
2851 | * rate[7] 0x4009006 VHT | ANT: B BW: 80Mhz MCS: 6 NSS: 1 NGI | |
2852 | * rate[8] 0x4005005 VHT | ANT: A BW: 80Mhz MCS: 5 NSS: 1 NGI | |
2853 | * rate[9] 0x800B Legacy | ANT: B Rate: 36 Mbps | |
2854 | * rate[10] 0x4009 Legacy | ANT: A Rate: 24 Mbps | |
2855 | * rate[11] 0x8007 Legacy | ANT: B Rate: 18 Mbps | |
2856 | * rate[12] 0x4005 Legacy | ANT: A Rate: 12 Mbps | |
2857 | * rate[13] 0x800F Legacy | ANT: B Rate: 9 Mbps | |
2858 | * rate[14] 0x400D Legacy | ANT: A Rate: 6 Mbps | |
2859 | * rate[15] 0x800D Legacy | ANT: B Rate: 6 Mbps | |
2860 | */ | |
8fc7c58c | 2861 | static void rs_build_rates_table(struct iwl_mvm *mvm, |
d8bafeaf | 2862 | struct ieee80211_sta *sta, |
8fc7c58c ES |
2863 | struct iwl_lq_sta *lq_sta, |
2864 | const struct rs_rate *initial_rate) | |
8ca151b5 | 2865 | { |
5aa33553 | 2866 | struct rs_rate rate; |
e07be6d3 | 2867 | int num_rates, num_retries, index = 0; |
8ca151b5 JB |
2868 | u8 valid_tx_ant = 0; |
2869 | struct iwl_lq_cmd *lq_cmd = &lq_sta->lq; | |
e07be6d3 | 2870 | bool toggle_ant = false; |
c5d679a5 | 2871 | bool stbc_allowed = false; |
8ca151b5 | 2872 | |
9e898f1b | 2873 | memcpy(&rate, initial_rate, sizeof(rate)); |
8fc7c58c | 2874 | |
a0544272 | 2875 | valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm); |
c5d679a5 ES |
2876 | |
2877 | stbc_allowed = rs_stbc_allow(mvm, sta, lq_sta); | |
2878 | if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LQ_SS_PARAMS) { | |
2879 | u32 ss_params = RS_SS_PARAMS_VALID; | |
2880 | ||
2881 | if (stbc_allowed) | |
2882 | ss_params |= RS_SS_STBC_ALLOWED; | |
2883 | lq_cmd->ss_params = cpu_to_le32(ss_params); | |
2884 | } else { | |
2885 | /* TODO: remove old API when min FW API hits 14 */ | |
2886 | rate.stbc = stbc_allowed; | |
2887 | } | |
8ca151b5 | 2888 | |
e07be6d3 | 2889 | if (is_siso(&rate)) { |
834437da ES |
2890 | num_rates = IWL_MVM_RS_INITIAL_SISO_NUM_RATES; |
2891 | num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE; | |
e07be6d3 | 2892 | } else if (is_mimo(&rate)) { |
834437da ES |
2893 | num_rates = IWL_MVM_RS_INITIAL_MIMO_NUM_RATES; |
2894 | num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE; | |
8ca151b5 | 2895 | } else { |
834437da | 2896 | num_rates = IWL_MVM_RS_INITIAL_LEGACY_NUM_RATES; |
bd999318 | 2897 | num_retries = IWL_MVM_RS_INITIAL_LEGACY_RETRIES; |
e07be6d3 | 2898 | toggle_ant = true; |
8ca151b5 JB |
2899 | } |
2900 | ||
e07be6d3 ES |
2901 | rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, |
2902 | num_rates, num_retries, valid_tx_ant, | |
2903 | toggle_ant); | |
8ca151b5 | 2904 | |
e07be6d3 | 2905 | rs_get_lower_rate_down_column(lq_sta, &rate); |
8ca151b5 | 2906 | |
e07be6d3 | 2907 | if (is_siso(&rate)) { |
834437da ES |
2908 | num_rates = IWL_MVM_RS_SECONDARY_SISO_NUM_RATES; |
2909 | num_retries = IWL_MVM_RS_SECONDARY_SISO_RETRIES; | |
d9088f60 | 2910 | lq_cmd->mimo_delim = index; |
e07be6d3 | 2911 | } else if (is_legacy(&rate)) { |
834437da | 2912 | num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES; |
bd999318 | 2913 | num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES; |
e07be6d3 ES |
2914 | } else { |
2915 | WARN_ON_ONCE(1); | |
2916 | } | |
8ca151b5 | 2917 | |
e07be6d3 | 2918 | toggle_ant = true; |
8ca151b5 | 2919 | |
e07be6d3 ES |
2920 | rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, |
2921 | num_rates, num_retries, valid_tx_ant, | |
2922 | toggle_ant); | |
8ca151b5 | 2923 | |
e07be6d3 | 2924 | rs_get_lower_rate_down_column(lq_sta, &rate); |
8ca151b5 | 2925 | |
834437da | 2926 | num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES; |
bd999318 | 2927 | num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES; |
8ca151b5 | 2928 | |
e07be6d3 ES |
2929 | rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, |
2930 | num_rates, num_retries, valid_tx_ant, | |
2931 | toggle_ant); | |
8ca151b5 | 2932 | |
8fc7c58c ES |
2933 | } |
2934 | ||
2935 | static void rs_fill_lq_cmd(struct iwl_mvm *mvm, | |
2936 | struct ieee80211_sta *sta, | |
2937 | struct iwl_lq_sta *lq_sta, | |
2938 | const struct rs_rate *initial_rate) | |
2939 | { | |
2940 | struct iwl_lq_cmd *lq_cmd = &lq_sta->lq; | |
7ceb98a3 EG |
2941 | struct iwl_mvm_sta *mvmsta; |
2942 | struct iwl_mvm_vif *mvmvif; | |
2943 | ||
834437da | 2944 | lq_cmd->agg_disable_start_th = IWL_MVM_RS_AGG_DISABLE_START; |
7ceb98a3 | 2945 | lq_cmd->agg_time_limit = |
834437da | 2946 | cpu_to_le16(IWL_MVM_RS_AGG_TIME_LIMIT); |
8fc7c58c ES |
2947 | |
2948 | #ifdef CONFIG_MAC80211_DEBUGFS | |
ae969afe | 2949 | if (lq_sta->pers.dbg_fixed_rate) { |
8fc7c58c ES |
2950 | rs_build_rates_table_from_fixed(mvm, lq_cmd, |
2951 | lq_sta->band, | |
ae969afe | 2952 | lq_sta->pers.dbg_fixed_rate); |
7ceb98a3 EG |
2953 | return; |
2954 | } | |
8fc7c58c | 2955 | #endif |
7ceb98a3 EG |
2956 | if (WARN_ON_ONCE(!sta || !initial_rate)) |
2957 | return; | |
8fc7c58c | 2958 | |
d8bafeaf | 2959 | rs_build_rates_table(mvm, sta, lq_sta, initial_rate); |
8ca151b5 | 2960 | |
7ceb98a3 EG |
2961 | if (num_of_ant(initial_rate->ant) == 1) |
2962 | lq_cmd->single_stream_ant_msk = initial_rate->ant; | |
8ca151b5 | 2963 | |
7ceb98a3 EG |
2964 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
2965 | mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); | |
e96d551f | 2966 | |
7ceb98a3 EG |
2967 | if (num_of_ant(initial_rate->ant) == 1) |
2968 | lq_cmd->single_stream_ant_msk = initial_rate->ant; | |
2969 | ||
2970 | lq_cmd->agg_frame_cnt_limit = mvmsta->max_agg_bufsize; | |
2971 | ||
2972 | /* | |
2973 | * In case of low latency, tell the firwmare to leave a frame in the | |
2974 | * Tx Fifo so that it can start a transaction in the same TxOP. This | |
2975 | * basically allows the firmware to send bursts. | |
2976 | */ | |
9ecd051e | 2977 | if (iwl_mvm_vif_low_latency(mvmvif)) { |
7ceb98a3 EG |
2978 | lq_cmd->agg_frame_cnt_limit--; |
2979 | ||
9ecd051e ES |
2980 | if (mvm->low_latency_agg_frame_limit) |
2981 | lq_cmd->agg_frame_cnt_limit = | |
2982 | min(lq_cmd->agg_frame_cnt_limit, | |
2983 | mvm->low_latency_agg_frame_limit); | |
2984 | } | |
2985 | ||
a4db848f EG |
2986 | if (mvmsta->vif->p2p) |
2987 | lq_cmd->flags |= LQ_FLAG_USE_RTS_MSK; | |
2988 | ||
7ceb98a3 | 2989 | lq_cmd->agg_time_limit = |
5b7ff615 | 2990 | cpu_to_le16(iwl_mvm_coex_agg_time_limit(mvm, sta)); |
8ca151b5 JB |
2991 | } |
2992 | ||
2993 | static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) | |
2994 | { | |
2995 | return hw->priv; | |
2996 | } | |
2997 | /* rate scale requires free function to be implemented */ | |
2998 | static void rs_free(void *mvm_rate) | |
2999 | { | |
3000 | return; | |
3001 | } | |
3002 | ||
3003 | static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta, | |
3004 | void *mvm_sta) | |
3005 | { | |
3006 | struct iwl_op_mode *op_mode __maybe_unused = mvm_r; | |
3007 | struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode); | |
3008 | ||
3009 | IWL_DEBUG_RATE(mvm, "enter\n"); | |
3010 | IWL_DEBUG_RATE(mvm, "leave\n"); | |
3011 | } | |
3012 | ||
3013 | #ifdef CONFIG_MAC80211_DEBUGFS | |
5fc0f76c | 3014 | int rs_pretty_print_rate(char *buf, const u32 rate) |
5aa33553 ES |
3015 | { |
3016 | ||
1a61b347 ES |
3017 | char *type, *bw; |
3018 | u8 mcs = 0, nss = 0; | |
3019 | u8 ant = (rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS; | |
3020 | ||
3021 | if (!(rate & RATE_MCS_HT_MSK) && | |
3022 | !(rate & RATE_MCS_VHT_MSK)) { | |
3023 | int index = iwl_hwrate_to_plcp_idx(rate); | |
3024 | ||
3025 | return sprintf(buf, "Legacy | ANT: %s Rate: %s Mbps\n", | |
560843f4 ES |
3026 | rs_pretty_ant(ant), |
3027 | index == IWL_RATE_INVALID ? "BAD" : | |
3028 | iwl_rate_mcs[index].mbps); | |
1a61b347 ES |
3029 | } |
3030 | ||
3031 | if (rate & RATE_MCS_VHT_MSK) { | |
3032 | type = "VHT"; | |
3033 | mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK; | |
3034 | nss = ((rate & RATE_VHT_MCS_NSS_MSK) | |
3035 | >> RATE_VHT_MCS_NSS_POS) + 1; | |
3036 | } else if (rate & RATE_MCS_HT_MSK) { | |
3037 | type = "HT"; | |
3038 | mcs = rate & RATE_HT_MCS_INDEX_MSK; | |
3039 | } else { | |
3040 | type = "Unknown"; /* shouldn't happen */ | |
3041 | } | |
3042 | ||
3043 | switch (rate & RATE_MCS_CHAN_WIDTH_MSK) { | |
3044 | case RATE_MCS_CHAN_WIDTH_20: | |
3045 | bw = "20Mhz"; | |
3046 | break; | |
3047 | case RATE_MCS_CHAN_WIDTH_40: | |
3048 | bw = "40Mhz"; | |
3049 | break; | |
3050 | case RATE_MCS_CHAN_WIDTH_80: | |
3051 | bw = "80Mhz"; | |
3052 | break; | |
3053 | case RATE_MCS_CHAN_WIDTH_160: | |
3054 | bw = "160Mhz"; | |
3055 | break; | |
3056 | default: | |
3057 | bw = "BAD BW"; | |
3058 | } | |
3059 | ||
3060 | return sprintf(buf, "%s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s%s\n", | |
5aa33553 | 3061 | type, rs_pretty_ant(ant), bw, mcs, nss, |
1a61b347 | 3062 | (rate & RATE_MCS_SGI_MSK) ? "SGI " : "NGI ", |
7b1dd048 | 3063 | (rate & RATE_MCS_HT_STBC_MSK) ? "STBC " : "", |
1a61b347 ES |
3064 | (rate & RATE_MCS_LDPC_MSK) ? "LDPC " : "", |
3065 | (rate & RATE_MCS_BF_MSK) ? "BF " : "", | |
3066 | (rate & RATE_MCS_ZLF_MSK) ? "ZLF " : ""); | |
3067 | } | |
3068 | ||
a0c38b21 ES |
3069 | /** |
3070 | * Program the device to use fixed rate for frame transmit | |
3071 | * This is for debugging/testing only | |
3072 | * once the device start use fixed rate, we need to reload the module | |
3073 | * to being back the normal operation. | |
3074 | */ | |
3075 | static void rs_program_fix_rate(struct iwl_mvm *mvm, | |
3076 | struct iwl_lq_sta *lq_sta) | |
3077 | { | |
3078 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ | |
3079 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
3080 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
3081 | ||
3082 | IWL_DEBUG_RATE(mvm, "sta_id %d rate 0x%X\n", | |
ae969afe | 3083 | lq_sta->lq.sta_id, lq_sta->pers.dbg_fixed_rate); |
a0c38b21 | 3084 | |
ae969afe | 3085 | if (lq_sta->pers.dbg_fixed_rate) { |
7ceb98a3 | 3086 | rs_fill_lq_cmd(mvm, NULL, lq_sta, NULL); |
ae969afe | 3087 | iwl_mvm_send_lq_cmd(lq_sta->pers.drv, &lq_sta->lq, false); |
a0c38b21 ES |
3088 | } |
3089 | } | |
3090 | ||
9d10849e EG |
3091 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
3092 | const char __user *user_buf, size_t count, loff_t *ppos) | |
3093 | { | |
3094 | struct iwl_lq_sta *lq_sta = file->private_data; | |
3095 | struct iwl_mvm *mvm; | |
3096 | char buf[64]; | |
3097 | size_t buf_size; | |
3098 | u32 parsed_rate; | |
3099 | ||
ae969afe | 3100 | mvm = lq_sta->pers.drv; |
9d10849e EG |
3101 | memset(buf, 0, sizeof(buf)); |
3102 | buf_size = min(count, sizeof(buf) - 1); | |
3103 | if (copy_from_user(buf, user_buf, buf_size)) | |
3104 | return -EFAULT; | |
3105 | ||
3106 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
ae969afe | 3107 | lq_sta->pers.dbg_fixed_rate = parsed_rate; |
9d10849e | 3108 | else |
ae969afe | 3109 | lq_sta->pers.dbg_fixed_rate = 0; |
9d10849e EG |
3110 | |
3111 | rs_program_fix_rate(mvm, lq_sta); | |
3112 | ||
3113 | return count; | |
3114 | } | |
3115 | ||
8ca151b5 JB |
3116 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
3117 | char __user *user_buf, size_t count, loff_t *ppos) | |
3118 | { | |
3119 | char *buff; | |
3120 | int desc = 0; | |
3121 | int i = 0; | |
8ca151b5 JB |
3122 | ssize_t ret; |
3123 | ||
3124 | struct iwl_lq_sta *lq_sta = file->private_data; | |
3125 | struct iwl_mvm *mvm; | |
3126 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
5aa33553 | 3127 | struct rs_rate *rate = &tbl->rate; |
ae969afe | 3128 | mvm = lq_sta->pers.drv; |
1a61b347 | 3129 | buff = kmalloc(2048, GFP_KERNEL); |
8ca151b5 JB |
3130 | if (!buff) |
3131 | return -ENOMEM; | |
3132 | ||
3133 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); | |
198266a3 | 3134 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%lX\n", |
8ca151b5 JB |
3135 | lq_sta->total_failed, lq_sta->total_success, |
3136 | lq_sta->active_legacy_rate); | |
3137 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", | |
ae969afe | 3138 | lq_sta->pers.dbg_fixed_rate); |
8ca151b5 | 3139 | desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n", |
a0544272 MH |
3140 | (iwl_mvm_get_valid_tx_ant(mvm) & ANT_A) ? "ANT_A," : "", |
3141 | (iwl_mvm_get_valid_tx_ant(mvm) & ANT_B) ? "ANT_B," : "", | |
3142 | (iwl_mvm_get_valid_tx_ant(mvm) & ANT_C) ? "ANT_C" : ""); | |
8ca151b5 | 3143 | desc += sprintf(buff+desc, "lq type %s\n", |
5aa33553 ES |
3144 | (is_legacy(rate)) ? "legacy" : |
3145 | is_vht(rate) ? "VHT" : "HT"); | |
3146 | if (!is_legacy(rate)) { | |
8ca151b5 | 3147 | desc += sprintf(buff+desc, " %s", |
5aa33553 | 3148 | (is_siso(rate)) ? "SISO" : "MIMO2"); |
8ca151b5 | 3149 | desc += sprintf(buff+desc, " %s", |
5aa33553 ES |
3150 | (is_ht20(rate)) ? "20MHz" : |
3151 | (is_ht40(rate)) ? "40MHz" : | |
3152 | (is_ht80(rate)) ? "80Mhz" : "BAD BW"); | |
a3576ff2 | 3153 | desc += sprintf(buff+desc, " %s %s %s\n", |
5aa33553 | 3154 | (rate->sgi) ? "SGI" : "NGI", |
a3576ff2 | 3155 | (rate->ldpc) ? "LDPC" : "BCC", |
6a524f48 | 3156 | (lq_sta->is_agg) ? "AGG on" : ""); |
8ca151b5 JB |
3157 | } |
3158 | desc += sprintf(buff+desc, "last tx rate=0x%X\n", | |
3159 | lq_sta->last_rate_n_flags); | |
3160 | desc += sprintf(buff+desc, | |
1a61b347 | 3161 | "general: flags=0x%X mimo-d=%d s-ant=0x%x d-ant=0x%x\n", |
8ca151b5 JB |
3162 | lq_sta->lq.flags, |
3163 | lq_sta->lq.mimo_delim, | |
3164 | lq_sta->lq.single_stream_ant_msk, | |
3165 | lq_sta->lq.dual_stream_ant_msk); | |
3166 | ||
3167 | desc += sprintf(buff+desc, | |
3168 | "agg: time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
3169 | le16_to_cpu(lq_sta->lq.agg_time_limit), | |
3170 | lq_sta->lq.agg_disable_start_th, | |
3171 | lq_sta->lq.agg_frame_cnt_limit); | |
3172 | ||
2fd647f8 | 3173 | desc += sprintf(buff+desc, "reduced tpc=%d\n", lq_sta->lq.reduced_tpc); |
8ca151b5 JB |
3174 | desc += sprintf(buff+desc, |
3175 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
3176 | lq_sta->lq.initial_rate_index[0], | |
3177 | lq_sta->lq.initial_rate_index[1], | |
3178 | lq_sta->lq.initial_rate_index[2], | |
3179 | lq_sta->lq.initial_rate_index[3]); | |
3180 | ||
3181 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { | |
cf4ef654 | 3182 | u32 r = le32_to_cpu(lq_sta->lq.rs_table[i]); |
1a61b347 | 3183 | |
cf4ef654 JB |
3184 | desc += sprintf(buff+desc, " rate[%d] 0x%X ", i, r); |
3185 | desc += rs_pretty_print_rate(buff+desc, r); | |
8ca151b5 JB |
3186 | } |
3187 | ||
3188 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
3189 | kfree(buff); | |
3190 | return ret; | |
3191 | } | |
3192 | ||
3193 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
3194 | .write = rs_sta_dbgfs_scale_table_write, | |
3195 | .read = rs_sta_dbgfs_scale_table_read, | |
3196 | .open = simple_open, | |
3197 | .llseek = default_llseek, | |
3198 | }; | |
3199 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, | |
3200 | char __user *user_buf, size_t count, loff_t *ppos) | |
3201 | { | |
3202 | char *buff; | |
3203 | int desc = 0; | |
3204 | int i, j; | |
3205 | ssize_t ret; | |
d310e405 | 3206 | struct iwl_scale_tbl_info *tbl; |
5aa33553 | 3207 | struct rs_rate *rate; |
8ca151b5 JB |
3208 | struct iwl_lq_sta *lq_sta = file->private_data; |
3209 | ||
3210 | buff = kmalloc(1024, GFP_KERNEL); | |
3211 | if (!buff) | |
3212 | return -ENOMEM; | |
3213 | ||
3214 | for (i = 0; i < LQ_SIZE; i++) { | |
d310e405 | 3215 | tbl = &(lq_sta->lq_info[i]); |
5aa33553 | 3216 | rate = &tbl->rate; |
8ca151b5 | 3217 | desc += sprintf(buff+desc, |
6a524f48 | 3218 | "%s type=%d SGI=%d BW=%s DUP=0\n" |
8fc7c58c | 3219 | "index=%d\n", |
8ca151b5 | 3220 | lq_sta->active_tbl == i ? "*" : "x", |
5aa33553 ES |
3221 | rate->type, |
3222 | rate->sgi, | |
3223 | is_ht20(rate) ? "20Mhz" : | |
3224 | is_ht40(rate) ? "40Mhz" : | |
3225 | is_ht80(rate) ? "80Mhz" : "ERR", | |
8fc7c58c | 3226 | rate->index); |
8ca151b5 JB |
3227 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
3228 | desc += sprintf(buff+desc, | |
3229 | "counter=%d success=%d %%=%d\n", | |
d310e405 ES |
3230 | tbl->win[j].counter, |
3231 | tbl->win[j].success_counter, | |
3232 | tbl->win[j].success_ratio); | |
8ca151b5 JB |
3233 | } |
3234 | } | |
3235 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
3236 | kfree(buff); | |
3237 | return ret; | |
3238 | } | |
3239 | ||
3240 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
3241 | .read = rs_sta_dbgfs_stats_table_read, | |
3242 | .open = simple_open, | |
3243 | .llseek = default_llseek, | |
3244 | }; | |
3245 | ||
757cf23b ES |
3246 | static ssize_t rs_sta_dbgfs_drv_tx_stats_read(struct file *file, |
3247 | char __user *user_buf, | |
3248 | size_t count, loff_t *ppos) | |
3249 | { | |
3250 | static const char * const column_name[] = { | |
3251 | [RS_COLUMN_LEGACY_ANT_A] = "LEGACY_ANT_A", | |
3252 | [RS_COLUMN_LEGACY_ANT_B] = "LEGACY_ANT_B", | |
3253 | [RS_COLUMN_SISO_ANT_A] = "SISO_ANT_A", | |
3254 | [RS_COLUMN_SISO_ANT_B] = "SISO_ANT_B", | |
3255 | [RS_COLUMN_SISO_ANT_A_SGI] = "SISO_ANT_A_SGI", | |
3256 | [RS_COLUMN_SISO_ANT_B_SGI] = "SISO_ANT_B_SGI", | |
3257 | [RS_COLUMN_MIMO2] = "MIMO2", | |
3258 | [RS_COLUMN_MIMO2_SGI] = "MIMO2_SGI", | |
3259 | }; | |
3260 | ||
3261 | static const char * const rate_name[] = { | |
3262 | [IWL_RATE_1M_INDEX] = "1M", | |
3263 | [IWL_RATE_2M_INDEX] = "2M", | |
3264 | [IWL_RATE_5M_INDEX] = "5.5M", | |
3265 | [IWL_RATE_11M_INDEX] = "11M", | |
3266 | [IWL_RATE_6M_INDEX] = "6M|MCS0", | |
3267 | [IWL_RATE_9M_INDEX] = "9M", | |
3268 | [IWL_RATE_12M_INDEX] = "12M|MCS1", | |
3269 | [IWL_RATE_18M_INDEX] = "18M|MCS2", | |
3270 | [IWL_RATE_24M_INDEX] = "24M|MCS3", | |
3271 | [IWL_RATE_36M_INDEX] = "36M|MCS4", | |
3272 | [IWL_RATE_48M_INDEX] = "48M|MCS5", | |
3273 | [IWL_RATE_54M_INDEX] = "54M|MCS6", | |
3274 | [IWL_RATE_MCS_7_INDEX] = "MCS7", | |
3275 | [IWL_RATE_MCS_8_INDEX] = "MCS8", | |
3276 | [IWL_RATE_MCS_9_INDEX] = "MCS9", | |
3277 | }; | |
3278 | ||
3279 | char *buff, *pos, *endpos; | |
3280 | int col, rate; | |
3281 | ssize_t ret; | |
3282 | struct iwl_lq_sta *lq_sta = file->private_data; | |
3283 | struct rs_rate_stats *stats; | |
3284 | static const size_t bufsz = 1024; | |
3285 | ||
3286 | buff = kmalloc(bufsz, GFP_KERNEL); | |
3287 | if (!buff) | |
3288 | return -ENOMEM; | |
3289 | ||
3290 | pos = buff; | |
3291 | endpos = pos + bufsz; | |
3292 | ||
3293 | pos += scnprintf(pos, endpos - pos, "COLUMN,"); | |
3294 | for (rate = 0; rate < IWL_RATE_COUNT; rate++) | |
3295 | pos += scnprintf(pos, endpos - pos, "%s,", rate_name[rate]); | |
3296 | pos += scnprintf(pos, endpos - pos, "\n"); | |
3297 | ||
3298 | for (col = 0; col < RS_COLUMN_COUNT; col++) { | |
3299 | pos += scnprintf(pos, endpos - pos, | |
3300 | "%s,", column_name[col]); | |
3301 | ||
3302 | for (rate = 0; rate < IWL_RATE_COUNT; rate++) { | |
f58220f6 | 3303 | stats = &(lq_sta->pers.tx_stats[col][rate]); |
757cf23b ES |
3304 | pos += scnprintf(pos, endpos - pos, |
3305 | "%llu/%llu,", | |
3306 | stats->success, | |
3307 | stats->total); | |
3308 | } | |
3309 | pos += scnprintf(pos, endpos - pos, "\n"); | |
3310 | } | |
3311 | ||
3312 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, pos - buff); | |
3313 | kfree(buff); | |
3314 | return ret; | |
3315 | } | |
3316 | ||
3317 | static ssize_t rs_sta_dbgfs_drv_tx_stats_write(struct file *file, | |
3318 | const char __user *user_buf, | |
3319 | size_t count, loff_t *ppos) | |
3320 | { | |
3321 | struct iwl_lq_sta *lq_sta = file->private_data; | |
f58220f6 | 3322 | memset(lq_sta->pers.tx_stats, 0, sizeof(lq_sta->pers.tx_stats)); |
757cf23b ES |
3323 | |
3324 | return count; | |
3325 | } | |
3326 | ||
3327 | static const struct file_operations rs_sta_dbgfs_drv_tx_stats_ops = { | |
3328 | .read = rs_sta_dbgfs_drv_tx_stats_read, | |
3329 | .write = rs_sta_dbgfs_drv_tx_stats_write, | |
3330 | .open = simple_open, | |
3331 | .llseek = default_llseek, | |
3332 | }; | |
3333 | ||
8ca151b5 JB |
3334 | static void rs_add_debugfs(void *mvm, void *mvm_sta, struct dentry *dir) |
3335 | { | |
3336 | struct iwl_lq_sta *lq_sta = mvm_sta; | |
c6e1faad EP |
3337 | debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir, |
3338 | lq_sta, &rs_sta_dbgfs_scale_table_ops); | |
3339 | debugfs_create_file("rate_stats_table", S_IRUSR, dir, | |
3340 | lq_sta, &rs_sta_dbgfs_stats_table_ops); | |
3341 | debugfs_create_file("drv_tx_stats", S_IRUSR | S_IWUSR, dir, | |
3342 | lq_sta, &rs_sta_dbgfs_drv_tx_stats_ops); | |
3343 | debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir, | |
3344 | &lq_sta->tx_agg_tid_en); | |
3345 | debugfs_create_u8("reduced_tpc", S_IRUSR | S_IWUSR, dir, | |
3346 | &lq_sta->pers.dbg_fixed_txp_reduction); | |
8ca151b5 JB |
3347 | } |
3348 | ||
3349 | static void rs_remove_debugfs(void *mvm, void *mvm_sta) | |
3350 | { | |
8ca151b5 JB |
3351 | } |
3352 | #endif | |
3353 | ||
3354 | /* | |
3355 | * Initialization of rate scaling information is done by driver after | |
3356 | * the station is added. Since mac80211 calls this function before a | |
3357 | * station is added we ignore it. | |
3358 | */ | |
3359 | static void rs_rate_init_stub(void *mvm_r, | |
3de805cf SW |
3360 | struct ieee80211_supported_band *sband, |
3361 | struct cfg80211_chan_def *chandef, | |
3362 | struct ieee80211_sta *sta, void *mvm_sta) | |
8ca151b5 JB |
3363 | { |
3364 | } | |
631ad703 JB |
3365 | |
3366 | static const struct rate_control_ops rs_mvm_ops = { | |
8ca151b5 | 3367 | .name = RS_NAME, |
1ebc8f2e | 3368 | .tx_status = rs_mac80211_tx_status, |
8ca151b5 JB |
3369 | .get_rate = rs_get_rate, |
3370 | .rate_init = rs_rate_init_stub, | |
3371 | .alloc = rs_alloc, | |
3372 | .free = rs_free, | |
3373 | .alloc_sta = rs_alloc_sta, | |
3374 | .free_sta = rs_free_sta, | |
b87c2179 | 3375 | .rate_update = rs_rate_update, |
8ca151b5 JB |
3376 | #ifdef CONFIG_MAC80211_DEBUGFS |
3377 | .add_sta_debugfs = rs_add_debugfs, | |
3378 | .remove_sta_debugfs = rs_remove_debugfs, | |
3379 | #endif | |
3380 | }; | |
3381 | ||
3382 | int iwl_mvm_rate_control_register(void) | |
3383 | { | |
3384 | return ieee80211_rate_control_register(&rs_mvm_ops); | |
3385 | } | |
3386 | ||
3387 | void iwl_mvm_rate_control_unregister(void) | |
3388 | { | |
3389 | ieee80211_rate_control_unregister(&rs_mvm_ops); | |
3390 | } | |
9ee718aa EL |
3391 | |
3392 | /** | |
3393 | * iwl_mvm_tx_protection - Gets LQ command, change it to enable/disable | |
3394 | * Tx protection, according to this rquest and previous requests, | |
3395 | * and send the LQ command. | |
9ee718aa EL |
3396 | * @mvmsta: The station |
3397 | * @enable: Enable Tx protection? | |
3398 | */ | |
e126b5d9 JB |
3399 | int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, |
3400 | bool enable) | |
9ee718aa | 3401 | { |
e126b5d9 JB |
3402 | struct iwl_lq_cmd *lq = &mvmsta->lq_sta.lq; |
3403 | ||
9ee718aa EL |
3404 | lockdep_assert_held(&mvm->mutex); |
3405 | ||
3406 | if (enable) { | |
3407 | if (mvmsta->tx_protection == 0) | |
d307ec8d | 3408 | lq->flags |= LQ_FLAG_USE_RTS_MSK; |
9ee718aa EL |
3409 | mvmsta->tx_protection++; |
3410 | } else { | |
3411 | mvmsta->tx_protection--; | |
3412 | if (mvmsta->tx_protection == 0) | |
d307ec8d | 3413 | lq->flags &= ~LQ_FLAG_USE_RTS_MSK; |
9ee718aa EL |
3414 | } |
3415 | ||
9e680946 | 3416 | return iwl_mvm_send_lq_cmd(mvm, lq, false); |
9ee718aa | 3417 | } |