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8ca151b5 JB |
1 | /****************************************************************************** |
2 | * | |
3 | * Copyright(c) 2005 - 2013 Intel Corporation. All rights reserved. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of version 2 of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | |
17 | * | |
18 | * The full GNU General Public License is included in this distribution in the | |
19 | * file called LICENSE. | |
20 | * | |
21 | * Contact Information: | |
22 | * Intel Linux Wireless <ilw@linux.intel.com> | |
23 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
24 | * | |
25 | *****************************************************************************/ | |
26 | #include <linux/kernel.h> | |
27 | #include <linux/init.h> | |
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 | ||
e07be6d3 ES |
45 | #define NUM_TRY_BEFORE_ANT_TOGGLE 1 |
46 | #define RS_LEGACY_RETRIES_PER_RATE 1 | |
47 | #define RS_HT_VHT_RETRIES_PER_RATE 2 | |
48 | #define RS_HT_VHT_RETRIES_PER_RATE_TW 1 | |
49 | #define RS_INITIAL_MIMO_NUM_RATES 3 | |
50 | #define RS_INITIAL_SISO_NUM_RATES 3 | |
51 | #define RS_INITIAL_LEGACY_NUM_RATES LINK_QUAL_MAX_RETRY_NUM | |
52 | #define RS_SECONDARY_LEGACY_NUM_RATES LINK_QUAL_MAX_RETRY_NUM | |
53 | #define RS_SECONDARY_SISO_NUM_RATES 3 | |
54 | #define RS_SECONDARY_SISO_RETRIES 1 | |
8ca151b5 JB |
55 | |
56 | #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ | |
d17334c4 | 57 | #define IWL_RATE_MIN_FAILURE_TH 3 /* min failures to calc tpt */ |
8ca151b5 JB |
58 | #define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ |
59 | ||
60 | /* max allowed rate miss before sync LQ cmd */ | |
61 | #define IWL_MISSED_RATE_MAX 15 | |
32b01726 ES |
62 | #define RS_STAY_IN_COLUMN_TIMEOUT (5*HZ) |
63 | ||
8ca151b5 JB |
64 | |
65 | static u8 rs_ht_to_legacy[] = { | |
da87d7d5 ES |
66 | [IWL_RATE_MCS_0_INDEX] = IWL_RATE_6M_INDEX, |
67 | [IWL_RATE_MCS_1_INDEX] = IWL_RATE_9M_INDEX, | |
68 | [IWL_RATE_MCS_2_INDEX] = IWL_RATE_12M_INDEX, | |
69 | [IWL_RATE_MCS_3_INDEX] = IWL_RATE_18M_INDEX, | |
70 | [IWL_RATE_MCS_4_INDEX] = IWL_RATE_24M_INDEX, | |
71 | [IWL_RATE_MCS_5_INDEX] = IWL_RATE_36M_INDEX, | |
72 | [IWL_RATE_MCS_6_INDEX] = IWL_RATE_48M_INDEX, | |
73 | [IWL_RATE_MCS_7_INDEX] = IWL_RATE_54M_INDEX, | |
74 | [IWL_RATE_MCS_8_INDEX] = IWL_RATE_54M_INDEX, | |
75 | [IWL_RATE_MCS_9_INDEX] = IWL_RATE_54M_INDEX, | |
8ca151b5 JB |
76 | }; |
77 | ||
78 | static const u8 ant_toggle_lookup[] = { | |
ef4394b9 EP |
79 | [ANT_NONE] = ANT_NONE, |
80 | [ANT_A] = ANT_B, | |
81 | [ANT_B] = ANT_C, | |
82 | [ANT_AB] = ANT_BC, | |
83 | [ANT_C] = ANT_A, | |
84 | [ANT_AC] = ANT_AB, | |
85 | [ANT_BC] = ANT_AC, | |
86 | [ANT_ABC] = ANT_ABC, | |
8ca151b5 JB |
87 | }; |
88 | ||
d310e405 ES |
89 | #define IWL_DECLARE_RATE_INFO(r, s, rp, rn) \ |
90 | [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \ | |
91 | IWL_RATE_HT_SISO_MCS_##s##_PLCP, \ | |
92 | IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \ | |
93 | IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \ | |
94 | IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP,\ | |
95 | IWL_RATE_##rp##M_INDEX, \ | |
ab055ce9 | 96 | IWL_RATE_##rn##M_INDEX } |
8ca151b5 | 97 | |
d310e405 ES |
98 | #define IWL_DECLARE_MCS_RATE(s) \ |
99 | [IWL_RATE_MCS_##s##_INDEX] = { IWL_RATE_INVM_PLCP, \ | |
100 | IWL_RATE_HT_SISO_MCS_##s##_PLCP, \ | |
101 | IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \ | |
102 | IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \ | |
103 | IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP, \ | |
104 | IWL_RATE_INVM_INDEX, \ | |
105 | IWL_RATE_INVM_INDEX } | |
106 | ||
8ca151b5 JB |
107 | /* |
108 | * Parameter order: | |
ab055ce9 | 109 | * rate, ht rate, prev rate, next rate |
8ca151b5 JB |
110 | * |
111 | * If there isn't a valid next or previous rate then INV is used which | |
112 | * maps to IWL_RATE_INVALID | |
113 | * | |
114 | */ | |
115 | static const struct iwl_rs_rate_info iwl_rates[IWL_RATE_COUNT] = { | |
ab055ce9 ES |
116 | IWL_DECLARE_RATE_INFO(1, INV, INV, 2), /* 1mbps */ |
117 | IWL_DECLARE_RATE_INFO(2, INV, 1, 5), /* 2mbps */ | |
118 | IWL_DECLARE_RATE_INFO(5, INV, 2, 11), /*5.5mbps */ | |
119 | IWL_DECLARE_RATE_INFO(11, INV, 9, 12), /* 11mbps */ | |
d310e405 ES |
120 | IWL_DECLARE_RATE_INFO(6, 0, 5, 11), /* 6mbps ; MCS 0 */ |
121 | IWL_DECLARE_RATE_INFO(9, INV, 6, 11), /* 9mbps */ | |
122 | IWL_DECLARE_RATE_INFO(12, 1, 11, 18), /* 12mbps ; MCS 1 */ | |
123 | IWL_DECLARE_RATE_INFO(18, 2, 12, 24), /* 18mbps ; MCS 2 */ | |
124 | IWL_DECLARE_RATE_INFO(24, 3, 18, 36), /* 24mbps ; MCS 3 */ | |
125 | IWL_DECLARE_RATE_INFO(36, 4, 24, 48), /* 36mbps ; MCS 4 */ | |
126 | IWL_DECLARE_RATE_INFO(48, 5, 36, 54), /* 48mbps ; MCS 5 */ | |
127 | IWL_DECLARE_RATE_INFO(54, 6, 48, INV), /* 54mbps ; MCS 6 */ | |
128 | IWL_DECLARE_MCS_RATE(7), /* MCS 7 */ | |
129 | IWL_DECLARE_MCS_RATE(8), /* MCS 8 */ | |
130 | IWL_DECLARE_MCS_RATE(9), /* MCS 9 */ | |
8ca151b5 JB |
131 | }; |
132 | ||
4e4b815c ES |
133 | enum rs_action { |
134 | RS_ACTION_STAY = 0, | |
135 | RS_ACTION_DOWNSCALE = -1, | |
136 | RS_ACTION_UPSCALE = 1, | |
137 | }; | |
138 | ||
b3b06a32 ES |
139 | enum rs_column_mode { |
140 | RS_INVALID = 0, | |
141 | RS_LEGACY, | |
142 | RS_SISO, | |
143 | RS_MIMO2, | |
144 | }; | |
145 | ||
146 | #define MAX_NEXT_COLUMNS 5 | |
147 | #define MAX_COLUMN_CHECKS 3 | |
148 | ||
149 | typedef bool (*allow_column_func_t) (struct iwl_mvm *mvm, | |
150 | struct ieee80211_sta *sta, | |
151 | struct iwl_scale_tbl_info *tbl); | |
152 | ||
153 | struct rs_tx_column { | |
154 | enum rs_column_mode mode; | |
155 | u8 ant; | |
156 | bool sgi; | |
157 | enum rs_column next_columns[MAX_NEXT_COLUMNS]; | |
158 | allow_column_func_t checks[MAX_COLUMN_CHECKS]; | |
159 | }; | |
160 | ||
161 | static bool rs_mimo_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
162 | struct iwl_scale_tbl_info *tbl) | |
163 | { | |
164 | if (!sta->ht_cap.ht_supported) | |
165 | return false; | |
166 | ||
167 | if (sta->smps_mode == IEEE80211_SMPS_STATIC) | |
168 | return false; | |
169 | ||
170 | if (num_of_ant(iwl_fw_valid_tx_ant(mvm->fw)) < 2) | |
171 | return false; | |
172 | ||
173 | if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) | |
174 | return false; | |
175 | ||
176 | return true; | |
177 | } | |
178 | ||
179 | static bool rs_siso_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
180 | struct iwl_scale_tbl_info *tbl) | |
181 | { | |
182 | if (!sta->ht_cap.ht_supported) | |
183 | return false; | |
184 | ||
185 | return true; | |
186 | } | |
187 | ||
188 | static bool rs_sgi_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
189 | struct iwl_scale_tbl_info *tbl) | |
190 | { | |
191 | struct rs_rate *rate = &tbl->rate; | |
192 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; | |
193 | struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; | |
194 | ||
195 | if (is_ht20(rate) && (ht_cap->cap & | |
196 | IEEE80211_HT_CAP_SGI_20)) | |
197 | return true; | |
198 | if (is_ht40(rate) && (ht_cap->cap & | |
199 | IEEE80211_HT_CAP_SGI_40)) | |
200 | return true; | |
201 | if (is_ht80(rate) && (vht_cap->cap & | |
202 | IEEE80211_VHT_CAP_SHORT_GI_80)) | |
203 | return true; | |
204 | ||
205 | return false; | |
206 | } | |
207 | ||
208 | static const struct rs_tx_column rs_tx_columns[] = { | |
209 | [RS_COLUMN_LEGACY_ANT_A] = { | |
210 | .mode = RS_LEGACY, | |
211 | .ant = ANT_A, | |
212 | .next_columns = { | |
213 | RS_COLUMN_LEGACY_ANT_B, | |
214 | RS_COLUMN_SISO_ANT_A, | |
215 | RS_COLUMN_MIMO2, | |
216 | RS_COLUMN_INVALID, | |
217 | RS_COLUMN_INVALID, | |
218 | }, | |
219 | }, | |
220 | [RS_COLUMN_LEGACY_ANT_B] = { | |
221 | .mode = RS_LEGACY, | |
222 | .ant = ANT_B, | |
223 | .next_columns = { | |
224 | RS_COLUMN_LEGACY_ANT_A, | |
225 | RS_COLUMN_SISO_ANT_B, | |
226 | RS_COLUMN_MIMO2, | |
227 | RS_COLUMN_INVALID, | |
228 | RS_COLUMN_INVALID, | |
229 | }, | |
230 | }, | |
231 | [RS_COLUMN_SISO_ANT_A] = { | |
232 | .mode = RS_SISO, | |
233 | .ant = ANT_A, | |
234 | .next_columns = { | |
235 | RS_COLUMN_SISO_ANT_B, | |
236 | RS_COLUMN_MIMO2, | |
237 | RS_COLUMN_SISO_ANT_A_SGI, | |
238 | RS_COLUMN_INVALID, | |
239 | RS_COLUMN_INVALID, | |
240 | }, | |
241 | .checks = { | |
242 | rs_siso_allow, | |
243 | }, | |
244 | }, | |
245 | [RS_COLUMN_SISO_ANT_B] = { | |
246 | .mode = RS_SISO, | |
247 | .ant = ANT_B, | |
248 | .next_columns = { | |
249 | RS_COLUMN_SISO_ANT_A, | |
250 | RS_COLUMN_MIMO2, | |
251 | RS_COLUMN_SISO_ANT_B_SGI, | |
252 | RS_COLUMN_INVALID, | |
253 | RS_COLUMN_INVALID, | |
254 | }, | |
255 | .checks = { | |
256 | rs_siso_allow, | |
257 | }, | |
258 | }, | |
259 | [RS_COLUMN_SISO_ANT_A_SGI] = { | |
260 | .mode = RS_SISO, | |
261 | .ant = ANT_A, | |
262 | .sgi = true, | |
263 | .next_columns = { | |
264 | RS_COLUMN_SISO_ANT_B_SGI, | |
265 | RS_COLUMN_MIMO2_SGI, | |
266 | RS_COLUMN_SISO_ANT_A, | |
267 | RS_COLUMN_INVALID, | |
268 | RS_COLUMN_INVALID, | |
269 | }, | |
270 | .checks = { | |
271 | rs_siso_allow, | |
272 | rs_sgi_allow, | |
273 | }, | |
274 | }, | |
275 | [RS_COLUMN_SISO_ANT_B_SGI] = { | |
276 | .mode = RS_SISO, | |
277 | .ant = ANT_B, | |
278 | .sgi = true, | |
279 | .next_columns = { | |
280 | RS_COLUMN_SISO_ANT_A_SGI, | |
281 | RS_COLUMN_MIMO2_SGI, | |
282 | RS_COLUMN_SISO_ANT_B, | |
283 | RS_COLUMN_INVALID, | |
284 | RS_COLUMN_INVALID, | |
285 | }, | |
286 | .checks = { | |
287 | rs_siso_allow, | |
288 | rs_sgi_allow, | |
289 | }, | |
290 | }, | |
291 | [RS_COLUMN_MIMO2] = { | |
292 | .mode = RS_MIMO2, | |
293 | .ant = ANT_AB, | |
294 | .next_columns = { | |
295 | RS_COLUMN_SISO_ANT_A, | |
296 | RS_COLUMN_MIMO2_SGI, | |
297 | RS_COLUMN_INVALID, | |
298 | RS_COLUMN_INVALID, | |
299 | RS_COLUMN_INVALID, | |
300 | }, | |
301 | .checks = { | |
302 | rs_mimo_allow, | |
303 | }, | |
304 | }, | |
305 | [RS_COLUMN_MIMO2_SGI] = { | |
306 | .mode = RS_MIMO2, | |
307 | .ant = ANT_AB, | |
308 | .sgi = true, | |
309 | .next_columns = { | |
310 | RS_COLUMN_SISO_ANT_A_SGI, | |
311 | RS_COLUMN_MIMO2, | |
312 | RS_COLUMN_INVALID, | |
313 | RS_COLUMN_INVALID, | |
314 | RS_COLUMN_INVALID, | |
315 | }, | |
316 | .checks = { | |
317 | rs_mimo_allow, | |
318 | rs_sgi_allow, | |
319 | }, | |
320 | }, | |
321 | }; | |
322 | ||
8ca151b5 JB |
323 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
324 | { | |
325 | /* also works for HT because bits 7:6 are zero there */ | |
326 | return (u8)(rate_n_flags & RATE_LEGACY_RATE_MSK); | |
327 | } | |
328 | ||
329 | static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags) | |
330 | { | |
331 | int idx = 0; | |
332 | ||
8ca151b5 | 333 | if (rate_n_flags & RATE_MCS_HT_MSK) { |
d310e405 ES |
334 | idx = rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK; |
335 | idx += IWL_RATE_MCS_0_INDEX; | |
8ca151b5 | 336 | |
d310e405 | 337 | /* skip 9M not supported in HT*/ |
8ca151b5 JB |
338 | if (idx >= IWL_RATE_9M_INDEX) |
339 | idx += 1; | |
4e82dd3a | 340 | if ((idx >= IWL_FIRST_HT_RATE) && (idx <= IWL_LAST_HT_RATE)) |
8ca151b5 | 341 | return idx; |
d310e405 ES |
342 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { |
343 | idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; | |
344 | idx += IWL_RATE_MCS_0_INDEX; | |
8ca151b5 | 345 | |
d310e405 ES |
346 | /* skip 9M not supported in VHT*/ |
347 | if (idx >= IWL_RATE_9M_INDEX) | |
348 | idx++; | |
349 | if ((idx >= IWL_FIRST_VHT_RATE) && (idx <= IWL_LAST_VHT_RATE)) | |
350 | return idx; | |
8ca151b5 | 351 | } else { |
d310e405 ES |
352 | /* legacy rate format, search for match in table */ |
353 | ||
354 | u8 legacy_rate = rs_extract_rate(rate_n_flags); | |
8ca151b5 | 355 | for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++) |
d310e405 | 356 | if (iwl_rates[idx].plcp == legacy_rate) |
8ca151b5 JB |
357 | return idx; |
358 | } | |
359 | ||
360 | return -1; | |
361 | } | |
362 | ||
363 | static void rs_rate_scale_perform(struct iwl_mvm *mvm, | |
364 | struct sk_buff *skb, | |
365 | struct ieee80211_sta *sta, | |
366 | struct iwl_lq_sta *lq_sta); | |
8fc7c58c ES |
367 | static void rs_fill_lq_cmd(struct iwl_mvm *mvm, |
368 | struct ieee80211_sta *sta, | |
369 | struct iwl_lq_sta *lq_sta, | |
370 | const struct rs_rate *initial_rate); | |
8ca151b5 | 371 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search); |
8ca151b5 | 372 | |
8ca151b5 JB |
373 | /** |
374 | * The following tables contain the expected throughput metrics for all rates | |
375 | * | |
376 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
377 | * | |
378 | * where invalid entries are zeros. | |
379 | * | |
380 | * CCK rates are only valid in legacy table and will only be used in G | |
381 | * (2.4 GHz) band. | |
382 | */ | |
383 | ||
384 | static s32 expected_tpt_legacy[IWL_RATE_COUNT] = { | |
4e82dd3a | 385 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0, 0, 0 |
8ca151b5 JB |
386 | }; |
387 | ||
4e82dd3a ES |
388 | /* Expected TpT tables. 4 indexes: |
389 | * 0 - NGI, 1 - SGI, 2 - AGG+NGI, 3 - AGG+SGI | |
390 | */ | |
391 | static s32 expected_tpt_siso_20MHz[4][IWL_RATE_COUNT] = { | |
392 | {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202, 216, 0}, | |
393 | {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210, 225, 0}, | |
394 | {0, 0, 0, 0, 49, 0, 97, 145, 192, 285, 375, 420, 464, 551, 0}, | |
395 | {0, 0, 0, 0, 54, 0, 108, 160, 213, 315, 415, 465, 513, 608, 0}, | |
8ca151b5 JB |
396 | }; |
397 | ||
4e82dd3a ES |
398 | static s32 expected_tpt_siso_40MHz[4][IWL_RATE_COUNT] = { |
399 | {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257, 269, 275}, | |
400 | {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264, 275, 280}, | |
401 | {0, 0, 0, 0, 101, 0, 199, 295, 389, 570, 744, 828, 911, 1070, 1173}, | |
402 | {0, 0, 0, 0, 112, 0, 220, 326, 429, 629, 819, 912, 1000, 1173, 1284}, | |
8ca151b5 JB |
403 | }; |
404 | ||
d310e405 ES |
405 | static s32 expected_tpt_siso_80MHz[4][IWL_RATE_COUNT] = { |
406 | {0, 0, 0, 0, 130, 0, 191, 223, 244, 273, 288, 294, 298, 305, 308}, | |
407 | {0, 0, 0, 0, 138, 0, 200, 231, 251, 279, 293, 298, 302, 308, 312}, | |
408 | {0, 0, 0, 0, 217, 0, 429, 634, 834, 1220, 1585, 1760, 1931, 2258, 2466}, | |
409 | {0, 0, 0, 0, 241, 0, 475, 701, 921, 1343, 1741, 1931, 2117, 2468, 2691}, | |
410 | }; | |
411 | ||
8ca151b5 | 412 | static s32 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = { |
4e82dd3a ES |
413 | {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250, 261, 0}, |
414 | {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256, 267, 0}, | |
415 | {0, 0, 0, 0, 98, 0, 193, 286, 375, 550, 718, 799, 878, 1032, 0}, | |
416 | {0, 0, 0, 0, 109, 0, 214, 316, 414, 607, 790, 879, 965, 1132, 0}, | |
8ca151b5 JB |
417 | }; |
418 | ||
419 | static s32 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = { | |
4e82dd3a ES |
420 | {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289, 296, 300}, |
421 | {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293, 300, 303}, | |
422 | {0, 0, 0, 0, 200, 0, 390, 571, 741, 1067, 1365, 1505, 1640, 1894, 2053}, | |
423 | {0, 0, 0, 0, 221, 0, 430, 630, 816, 1169, 1490, 1641, 1784, 2053, 2221}, | |
8ca151b5 JB |
424 | }; |
425 | ||
d310e405 ES |
426 | static s32 expected_tpt_mimo2_80MHz[4][IWL_RATE_COUNT] = { |
427 | {0, 0, 0, 0, 182, 0, 240, 264, 278, 299, 308, 311, 313, 317, 319}, | |
428 | {0, 0, 0, 0, 190, 0, 247, 269, 282, 302, 310, 313, 315, 319, 320}, | |
429 | {0, 0, 0, 0, 428, 0, 833, 1215, 1577, 2254, 2863, 3147, 3418, 3913, 4219}, | |
430 | {0, 0, 0, 0, 474, 0, 920, 1338, 1732, 2464, 3116, 3418, 3705, 4225, 4545}, | |
431 | }; | |
432 | ||
8ca151b5 JB |
433 | /* mbps, mcs */ |
434 | static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = { | |
435 | { "1", "BPSK DSSS"}, | |
436 | { "2", "QPSK DSSS"}, | |
437 | {"5.5", "BPSK CCK"}, | |
438 | { "11", "QPSK CCK"}, | |
439 | { "6", "BPSK 1/2"}, | |
440 | { "9", "BPSK 1/2"}, | |
441 | { "12", "QPSK 1/2"}, | |
442 | { "18", "QPSK 3/4"}, | |
443 | { "24", "16QAM 1/2"}, | |
444 | { "36", "16QAM 3/4"}, | |
445 | { "48", "64QAM 2/3"}, | |
446 | { "54", "64QAM 3/4"}, | |
447 | { "60", "64QAM 5/6"}, | |
448 | }; | |
449 | ||
450 | #define MCS_INDEX_PER_STREAM (8) | |
451 | ||
9d10849e EG |
452 | static const char *rs_pretty_ant(u8 ant) |
453 | { | |
454 | static const char * const ant_name[] = { | |
455 | [ANT_NONE] = "None", | |
456 | [ANT_A] = "A", | |
457 | [ANT_B] = "B", | |
458 | [ANT_AB] = "AB", | |
459 | [ANT_C] = "C", | |
460 | [ANT_AC] = "AC", | |
461 | [ANT_BC] = "BC", | |
462 | [ANT_ABC] = "ABC", | |
463 | }; | |
464 | ||
465 | if (ant > ANT_ABC) | |
466 | return "UNKNOWN"; | |
467 | ||
468 | return ant_name[ant]; | |
469 | } | |
470 | ||
471 | static const char *rs_pretty_lq_type(enum iwl_table_type type) | |
472 | { | |
473 | static const char * const lq_types[] = { | |
474 | [LQ_NONE] = "NONE", | |
475 | [LQ_LEGACY_A] = "LEGACY_A", | |
476 | [LQ_LEGACY_G] = "LEGACY_G", | |
477 | [LQ_HT_SISO] = "HT SISO", | |
478 | [LQ_HT_MIMO2] = "HT MIMO", | |
479 | [LQ_VHT_SISO] = "VHT SISO", | |
480 | [LQ_VHT_MIMO2] = "VHT MIMO", | |
481 | }; | |
482 | ||
483 | if (type < LQ_NONE || type >= LQ_MAX) | |
484 | return "UNKNOWN"; | |
485 | ||
486 | return lq_types[type]; | |
487 | } | |
488 | ||
5aa33553 ES |
489 | static inline void rs_dump_rate(struct iwl_mvm *mvm, const struct rs_rate *rate, |
490 | const char *prefix) | |
491 | { | |
492 | IWL_DEBUG_RATE(mvm, "%s: (%s: %d) ANT: %s BW: %d SGI: %d\n", | |
493 | prefix, rs_pretty_lq_type(rate->type), | |
494 | rate->index, rs_pretty_ant(rate->ant), | |
495 | rate->bw, rate->sgi); | |
496 | } | |
497 | ||
8ca151b5 JB |
498 | static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) |
499 | { | |
500 | window->data = 0; | |
501 | window->success_counter = 0; | |
502 | window->success_ratio = IWL_INVALID_VALUE; | |
503 | window->counter = 0; | |
504 | window->average_tpt = IWL_INVALID_VALUE; | |
8ca151b5 JB |
505 | } |
506 | ||
507 | static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) | |
508 | { | |
509 | return (ant_type & valid_antenna) == ant_type; | |
510 | } | |
511 | ||
8ca151b5 JB |
512 | static int rs_tl_turn_on_agg_for_tid(struct iwl_mvm *mvm, |
513 | struct iwl_lq_sta *lq_data, u8 tid, | |
514 | struct ieee80211_sta *sta) | |
515 | { | |
516 | int ret = -EAGAIN; | |
8ca151b5 | 517 | |
44cc429c EG |
518 | IWL_DEBUG_HT(mvm, "Starting Tx agg: STA: %pM tid: %d\n", |
519 | sta->addr, tid); | |
520 | ret = ieee80211_start_tx_ba_session(sta, tid, 5000); | |
521 | if (ret == -EAGAIN) { | |
522 | /* | |
523 | * driver and mac80211 is out of sync | |
524 | * this might be cause by reloading firmware | |
525 | * stop the tx ba session here | |
526 | */ | |
527 | IWL_ERR(mvm, "Fail start Tx agg on tid: %d\n", | |
528 | tid); | |
529 | ieee80211_stop_tx_ba_session(sta, tid); | |
8ca151b5 JB |
530 | } |
531 | return ret; | |
532 | } | |
533 | ||
534 | static void rs_tl_turn_on_agg(struct iwl_mvm *mvm, u8 tid, | |
535 | struct iwl_lq_sta *lq_data, | |
536 | struct ieee80211_sta *sta) | |
537 | { | |
538 | if (tid < IWL_MAX_TID_COUNT) | |
539 | rs_tl_turn_on_agg_for_tid(mvm, lq_data, tid, sta); | |
540 | else | |
541 | IWL_ERR(mvm, "tid exceeds max TID count: %d/%d\n", | |
542 | tid, IWL_MAX_TID_COUNT); | |
543 | } | |
544 | ||
545 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) | |
546 | { | |
547 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + | |
548 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
549 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
550 | } | |
551 | ||
552 | /* | |
553 | * Static function to get the expected throughput from an iwl_scale_tbl_info | |
554 | * that wraps a NULL pointer check | |
555 | */ | |
556 | static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index) | |
557 | { | |
558 | if (tbl->expected_tpt) | |
559 | return tbl->expected_tpt[rs_index]; | |
560 | return 0; | |
561 | } | |
562 | ||
563 | /** | |
564 | * rs_collect_tx_data - Update the success/failure sliding window | |
565 | * | |
566 | * We keep a sliding window of the last 62 packets transmitted | |
567 | * at this rate. window->data contains the bitmask of successful | |
568 | * packets. | |
569 | */ | |
570 | static int rs_collect_tx_data(struct iwl_scale_tbl_info *tbl, | |
571 | int scale_index, int attempts, int successes) | |
572 | { | |
573 | struct iwl_rate_scale_data *window = NULL; | |
574 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); | |
575 | s32 fail_count, tpt; | |
576 | ||
577 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) | |
578 | return -EINVAL; | |
579 | ||
580 | /* Select window for current tx bit rate */ | |
581 | window = &(tbl->win[scale_index]); | |
582 | ||
583 | /* Get expected throughput */ | |
584 | tpt = get_expected_tpt(tbl, scale_index); | |
585 | ||
586 | /* | |
587 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
588 | * history window; anything older isn't really relevant any more. | |
589 | * If we have filled up the sliding window, drop the oldest attempt; | |
590 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
591 | * subtract "1" from the success counter (this is the main reason | |
592 | * we keep these bitmaps!). | |
593 | */ | |
594 | while (attempts > 0) { | |
595 | if (window->counter >= IWL_RATE_MAX_WINDOW) { | |
596 | /* remove earliest */ | |
597 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
598 | ||
599 | if (window->data & mask) { | |
600 | window->data &= ~mask; | |
601 | window->success_counter--; | |
602 | } | |
603 | } | |
604 | ||
605 | /* Increment frames-attempted counter */ | |
606 | window->counter++; | |
607 | ||
608 | /* Shift bitmap by one frame to throw away oldest history */ | |
609 | window->data <<= 1; | |
610 | ||
611 | /* Mark the most recent #successes attempts as successful */ | |
612 | if (successes > 0) { | |
613 | window->success_counter++; | |
614 | window->data |= 0x1; | |
615 | successes--; | |
616 | } | |
617 | ||
618 | attempts--; | |
619 | } | |
620 | ||
621 | /* Calculate current success ratio, avoid divide-by-0! */ | |
622 | if (window->counter > 0) | |
623 | window->success_ratio = 128 * (100 * window->success_counter) | |
624 | / window->counter; | |
625 | else | |
626 | window->success_ratio = IWL_INVALID_VALUE; | |
627 | ||
628 | fail_count = window->counter - window->success_counter; | |
629 | ||
630 | /* Calculate average throughput, if we have enough history. */ | |
631 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || | |
632 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
633 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
634 | else | |
635 | window->average_tpt = IWL_INVALID_VALUE; | |
636 | ||
8ca151b5 JB |
637 | return 0; |
638 | } | |
639 | ||
5aa33553 ES |
640 | /* Convert rs_rate object into ucode rate bitmask */ |
641 | static u32 ucode_rate_from_rs_rate(struct iwl_mvm *mvm, | |
8fc7c58c | 642 | struct rs_rate *rate) |
8ca151b5 | 643 | { |
5aa33553 ES |
644 | u32 ucode_rate = 0; |
645 | int index = rate->index; | |
8ca151b5 | 646 | |
5aa33553 | 647 | ucode_rate |= ((rate->ant << RATE_MCS_ANT_POS) & |
d310e405 ES |
648 | RATE_MCS_ANT_ABC_MSK); |
649 | ||
5aa33553 ES |
650 | if (is_legacy(rate)) { |
651 | ucode_rate |= iwl_rates[index].plcp; | |
8ca151b5 | 652 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
5aa33553 ES |
653 | ucode_rate |= RATE_MCS_CCK_MSK; |
654 | return ucode_rate; | |
d310e405 ES |
655 | } |
656 | ||
5aa33553 | 657 | if (is_ht(rate)) { |
d310e405 | 658 | if (index < IWL_FIRST_HT_RATE || index > IWL_LAST_HT_RATE) { |
8ca151b5 | 659 | IWL_ERR(mvm, "Invalid HT rate index %d\n", index); |
4e82dd3a | 660 | index = IWL_LAST_HT_RATE; |
8ca151b5 | 661 | } |
5aa33553 | 662 | ucode_rate |= RATE_MCS_HT_MSK; |
8ca151b5 | 663 | |
5aa33553 ES |
664 | if (is_ht_siso(rate)) |
665 | ucode_rate |= iwl_rates[index].plcp_ht_siso; | |
666 | else if (is_ht_mimo2(rate)) | |
667 | ucode_rate |= iwl_rates[index].plcp_ht_mimo2; | |
8ca151b5 | 668 | else |
d972ab31 | 669 | WARN_ON_ONCE(1); |
5aa33553 | 670 | } else if (is_vht(rate)) { |
d310e405 ES |
671 | if (index < IWL_FIRST_VHT_RATE || index > IWL_LAST_VHT_RATE) { |
672 | IWL_ERR(mvm, "Invalid VHT rate index %d\n", index); | |
673 | index = IWL_LAST_VHT_RATE; | |
674 | } | |
5aa33553 ES |
675 | ucode_rate |= RATE_MCS_VHT_MSK; |
676 | if (is_vht_siso(rate)) | |
677 | ucode_rate |= iwl_rates[index].plcp_vht_siso; | |
678 | else if (is_vht_mimo2(rate)) | |
679 | ucode_rate |= iwl_rates[index].plcp_vht_mimo2; | |
d310e405 ES |
680 | else |
681 | WARN_ON_ONCE(1); | |
682 | ||
8ca151b5 | 683 | } else { |
5aa33553 | 684 | IWL_ERR(mvm, "Invalid rate->type %d\n", rate->type); |
8ca151b5 JB |
685 | } |
686 | ||
5aa33553 ES |
687 | ucode_rate |= rate->bw; |
688 | if (rate->sgi) | |
689 | ucode_rate |= RATE_MCS_SGI_MSK; | |
d310e405 | 690 | |
5aa33553 | 691 | return ucode_rate; |
8ca151b5 JB |
692 | } |
693 | ||
5aa33553 ES |
694 | /* Convert a ucode rate into an rs_rate object */ |
695 | static int rs_rate_from_ucode_rate(const u32 ucode_rate, | |
696 | enum ieee80211_band band, | |
697 | struct rs_rate *rate) | |
8ca151b5 | 698 | { |
5aa33553 ES |
699 | u32 ant_msk = ucode_rate & RATE_MCS_ANT_ABC_MSK; |
700 | u8 num_of_ant = get_num_of_ant_from_rate(ucode_rate); | |
d310e405 | 701 | u8 nss; |
8ca151b5 | 702 | |
5aa33553 ES |
703 | memset(rate, 0, sizeof(struct rs_rate)); |
704 | rate->index = iwl_hwrate_to_plcp_idx(ucode_rate); | |
8ca151b5 | 705 | |
5aa33553 ES |
706 | if (rate->index == IWL_RATE_INVALID) { |
707 | rate->index = -1; | |
8ca151b5 JB |
708 | return -EINVAL; |
709 | } | |
5aa33553 ES |
710 | |
711 | rate->ant = (ant_msk >> RATE_MCS_ANT_POS); | |
8ca151b5 | 712 | |
d310e405 | 713 | /* Legacy */ |
5aa33553 ES |
714 | if (!(ucode_rate & RATE_MCS_HT_MSK) && |
715 | !(ucode_rate & RATE_MCS_VHT_MSK)) { | |
8ca151b5 JB |
716 | if (num_of_ant == 1) { |
717 | if (band == IEEE80211_BAND_5GHZ) | |
5aa33553 | 718 | rate->type = LQ_LEGACY_A; |
8ca151b5 | 719 | else |
5aa33553 | 720 | rate->type = LQ_LEGACY_G; |
8ca151b5 | 721 | } |
d310e405 ES |
722 | |
723 | return 0; | |
724 | } | |
725 | ||
726 | /* HT or VHT */ | |
5aa33553 ES |
727 | if (ucode_rate & RATE_MCS_SGI_MSK) |
728 | rate->sgi = true; | |
d310e405 | 729 | |
5aa33553 | 730 | rate->bw = ucode_rate & RATE_MCS_CHAN_WIDTH_MSK; |
d310e405 | 731 | |
5aa33553 ES |
732 | if (ucode_rate & RATE_MCS_HT_MSK) { |
733 | nss = ((ucode_rate & RATE_HT_MCS_NSS_MSK) >> | |
d310e405 ES |
734 | RATE_HT_MCS_NSS_POS) + 1; |
735 | ||
736 | if (nss == 1) { | |
5aa33553 | 737 | rate->type = LQ_HT_SISO; |
d310e405 ES |
738 | WARN_ON_ONCE(num_of_ant != 1); |
739 | } else if (nss == 2) { | |
5aa33553 | 740 | rate->type = LQ_HT_MIMO2; |
d310e405 | 741 | WARN_ON_ONCE(num_of_ant != 2); |
8ca151b5 | 742 | } else { |
d310e405 ES |
743 | WARN_ON_ONCE(1); |
744 | } | |
5aa33553 ES |
745 | } else if (ucode_rate & RATE_MCS_VHT_MSK) { |
746 | nss = ((ucode_rate & RATE_VHT_MCS_NSS_MSK) >> | |
d310e405 ES |
747 | RATE_VHT_MCS_NSS_POS) + 1; |
748 | ||
749 | if (nss == 1) { | |
5aa33553 | 750 | rate->type = LQ_VHT_SISO; |
d310e405 ES |
751 | WARN_ON_ONCE(num_of_ant != 1); |
752 | } else if (nss == 2) { | |
5aa33553 | 753 | rate->type = LQ_VHT_MIMO2; |
d310e405 ES |
754 | WARN_ON_ONCE(num_of_ant != 2); |
755 | } else { | |
756 | WARN_ON_ONCE(1); | |
8ca151b5 JB |
757 | } |
758 | } | |
d310e405 | 759 | |
5aa33553 ES |
760 | WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_160); |
761 | WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_80 && | |
762 | !is_vht(rate)); | |
d310e405 | 763 | |
8ca151b5 JB |
764 | return 0; |
765 | } | |
766 | ||
767 | /* switch to another antenna/antennas and return 1 */ | |
768 | /* if no other valid antenna found, return 0 */ | |
8fc7c58c | 769 | static int rs_toggle_antenna(u32 valid_ant, struct rs_rate *rate) |
8ca151b5 JB |
770 | { |
771 | u8 new_ant_type; | |
772 | ||
5aa33553 | 773 | if (!rate->ant || rate->ant > ANT_ABC) |
8ca151b5 JB |
774 | return 0; |
775 | ||
5aa33553 | 776 | if (!rs_is_valid_ant(valid_ant, rate->ant)) |
8ca151b5 JB |
777 | return 0; |
778 | ||
5aa33553 | 779 | new_ant_type = ant_toggle_lookup[rate->ant]; |
8ca151b5 | 780 | |
5aa33553 | 781 | while ((new_ant_type != rate->ant) && |
8ca151b5 JB |
782 | !rs_is_valid_ant(valid_ant, new_ant_type)) |
783 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
784 | ||
5aa33553 | 785 | if (new_ant_type == rate->ant) |
8ca151b5 JB |
786 | return 0; |
787 | ||
5aa33553 ES |
788 | rate->ant = new_ant_type; |
789 | ||
8ca151b5 JB |
790 | return 1; |
791 | } | |
792 | ||
8ca151b5 | 793 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
5aa33553 | 794 | struct rs_rate *rate) |
8ca151b5 | 795 | { |
5aa33553 | 796 | if (is_legacy(rate)) |
8ca151b5 | 797 | return lq_sta->active_legacy_rate; |
5aa33553 | 798 | else if (is_siso(rate)) |
d310e405 | 799 | return lq_sta->active_siso_rate; |
5aa33553 | 800 | else if (is_mimo2(rate)) |
d310e405 ES |
801 | return lq_sta->active_mimo2_rate; |
802 | ||
803 | WARN_ON_ONCE(1); | |
804 | return 0; | |
8ca151b5 JB |
805 | } |
806 | ||
807 | static u16 rs_get_adjacent_rate(struct iwl_mvm *mvm, u8 index, u16 rate_mask, | |
808 | int rate_type) | |
809 | { | |
810 | u8 high = IWL_RATE_INVALID; | |
811 | u8 low = IWL_RATE_INVALID; | |
812 | ||
813 | /* 802.11A or ht walks to the next literal adjacent rate in | |
814 | * the rate table */ | |
5aa33553 | 815 | if (is_type_a_band(rate_type) || !is_type_legacy(rate_type)) { |
8ca151b5 JB |
816 | int i; |
817 | u32 mask; | |
818 | ||
819 | /* Find the previous rate that is in the rate mask */ | |
820 | i = index - 1; | |
821 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
822 | if (rate_mask & mask) { | |
823 | low = i; | |
824 | break; | |
825 | } | |
826 | } | |
827 | ||
828 | /* Find the next rate that is in the rate mask */ | |
829 | i = index + 1; | |
830 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
831 | if (rate_mask & mask) { | |
832 | high = i; | |
833 | break; | |
834 | } | |
835 | } | |
836 | ||
837 | return (high << 8) | low; | |
838 | } | |
839 | ||
840 | low = index; | |
841 | while (low != IWL_RATE_INVALID) { | |
842 | low = iwl_rates[low].prev_rs; | |
843 | if (low == IWL_RATE_INVALID) | |
844 | break; | |
845 | if (rate_mask & (1 << low)) | |
846 | break; | |
847 | IWL_DEBUG_RATE(mvm, "Skipping masked lower rate: %d\n", low); | |
848 | } | |
849 | ||
850 | high = index; | |
851 | while (high != IWL_RATE_INVALID) { | |
852 | high = iwl_rates[high].next_rs; | |
853 | if (high == IWL_RATE_INVALID) | |
854 | break; | |
855 | if (rate_mask & (1 << high)) | |
856 | break; | |
857 | IWL_DEBUG_RATE(mvm, "Skipping masked higher rate: %d\n", high); | |
858 | } | |
859 | ||
860 | return (high << 8) | low; | |
861 | } | |
862 | ||
e07be6d3 ES |
863 | static inline bool rs_rate_supported(struct iwl_lq_sta *lq_sta, |
864 | struct rs_rate *rate) | |
8ca151b5 | 865 | { |
e07be6d3 ES |
866 | return BIT(rate->index) & rs_get_supported_rates(lq_sta, rate); |
867 | } | |
868 | ||
869 | /* Get the next supported lower rate in the current column. | |
870 | * Return true if bottom rate in the current column was reached | |
871 | */ | |
872 | static bool rs_get_lower_rate_in_column(struct iwl_lq_sta *lq_sta, | |
873 | struct rs_rate *rate) | |
874 | { | |
875 | u8 low; | |
8ca151b5 | 876 | u16 high_low; |
e07be6d3 ES |
877 | u16 rate_mask; |
878 | struct iwl_mvm *mvm = lq_sta->drv; | |
879 | ||
880 | rate_mask = rs_get_supported_rates(lq_sta, rate); | |
881 | high_low = rs_get_adjacent_rate(mvm, rate->index, rate_mask, | |
882 | rate->type); | |
883 | low = high_low & 0xff; | |
884 | ||
885 | /* Bottom rate of column reached */ | |
886 | if (low == IWL_RATE_INVALID) | |
887 | return true; | |
888 | ||
889 | rate->index = low; | |
890 | return false; | |
891 | } | |
892 | ||
893 | /* Get the next rate to use following a column downgrade */ | |
894 | static void rs_get_lower_rate_down_column(struct iwl_lq_sta *lq_sta, | |
895 | struct rs_rate *rate) | |
896 | { | |
8ca151b5 JB |
897 | struct iwl_mvm *mvm = lq_sta->drv; |
898 | ||
e07be6d3 ES |
899 | if (is_legacy(rate)) { |
900 | /* No column to downgrade from Legacy */ | |
901 | return; | |
902 | } else if (is_siso(rate)) { | |
903 | /* Downgrade to Legacy if we were in SISO */ | |
8ca151b5 | 904 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
5aa33553 | 905 | rate->type = LQ_LEGACY_A; |
8ca151b5 | 906 | else |
5aa33553 | 907 | rate->type = LQ_LEGACY_G; |
8ca151b5 | 908 | |
a56db7d1 | 909 | rate->bw = RATE_MCS_CHAN_WIDTH_20; |
8ca151b5 | 910 | |
e07be6d3 ES |
911 | WARN_ON_ONCE(rate->index < IWL_RATE_MCS_0_INDEX && |
912 | rate->index > IWL_RATE_MCS_9_INDEX); | |
8ca151b5 | 913 | |
e07be6d3 ES |
914 | rate->index = rs_ht_to_legacy[rate->index]; |
915 | } else { | |
916 | /* Downgrade to SISO with same MCS if in MIMO */ | |
917 | rate->type = is_vht_mimo2(rate) ? | |
918 | LQ_VHT_SISO : LQ_HT_SISO; | |
8ca151b5 JB |
919 | } |
920 | ||
8ca151b5 | 921 | |
e07be6d3 ES |
922 | if (num_of_ant(rate->ant) > 1) |
923 | rate->ant = first_antenna(iwl_fw_valid_tx_ant(mvm->fw)); | |
8ca151b5 | 924 | |
e07be6d3 ES |
925 | /* Relevant in both switching to SISO or Legacy */ |
926 | rate->sgi = false; | |
927 | ||
928 | if (!rs_rate_supported(lq_sta, rate)) | |
929 | rs_get_lower_rate_in_column(lq_sta, rate); | |
8ca151b5 JB |
930 | } |
931 | ||
5aa33553 ES |
932 | /* Simple function to compare two rate scale table types */ |
933 | static inline bool rs_rate_match(struct rs_rate *a, | |
934 | struct rs_rate *b) | |
8ca151b5 | 935 | { |
5aa33553 | 936 | return (a->type == b->type) && (a->ant == b->ant) && (a->sgi == b->sgi); |
8ca151b5 JB |
937 | } |
938 | ||
d310e405 ES |
939 | static u32 rs_ch_width_from_mac_flags(enum mac80211_rate_control_flags flags) |
940 | { | |
941 | if (flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
942 | return RATE_MCS_CHAN_WIDTH_40; | |
943 | else if (flags & IEEE80211_TX_RC_80_MHZ_WIDTH) | |
944 | return RATE_MCS_CHAN_WIDTH_80; | |
945 | else if (flags & IEEE80211_TX_RC_160_MHZ_WIDTH) | |
946 | return RATE_MCS_CHAN_WIDTH_160; | |
947 | ||
948 | return RATE_MCS_CHAN_WIDTH_20; | |
949 | } | |
950 | ||
8ca151b5 JB |
951 | /* |
952 | * mac80211 sends us Tx status | |
953 | */ | |
954 | static void rs_tx_status(void *mvm_r, struct ieee80211_supported_band *sband, | |
955 | struct ieee80211_sta *sta, void *priv_sta, | |
956 | struct sk_buff *skb) | |
957 | { | |
958 | int legacy_success; | |
959 | int retries; | |
5aa33553 | 960 | int mac_index, i; |
8ca151b5 JB |
961 | struct iwl_lq_sta *lq_sta = priv_sta; |
962 | struct iwl_lq_cmd *table; | |
963 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
964 | struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_r; | |
965 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
966 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
967 | enum mac80211_rate_control_flags mac_flags; | |
5aa33553 ES |
968 | u32 ucode_rate; |
969 | struct rs_rate rate; | |
8ca151b5 JB |
970 | struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl; |
971 | ||
8ca151b5 JB |
972 | /* Treat uninitialized rate scaling data same as non-existing. */ |
973 | if (!lq_sta) { | |
974 | IWL_DEBUG_RATE(mvm, "Station rate scaling not created yet.\n"); | |
975 | return; | |
976 | } else if (!lq_sta->drv) { | |
977 | IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n"); | |
978 | return; | |
979 | } | |
980 | ||
981 | if (!ieee80211_is_data(hdr->frame_control) || | |
982 | info->flags & IEEE80211_TX_CTL_NO_ACK) | |
983 | return; | |
984 | ||
985 | /* This packet was aggregated but doesn't carry status info */ | |
986 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && | |
987 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
988 | return; | |
989 | ||
990 | /* | |
991 | * Ignore this Tx frame response if its initial rate doesn't match | |
992 | * that of latest Link Quality command. There may be stragglers | |
993 | * from a previous Link Quality command, but we're no longer interested | |
994 | * in those; they're either from the "active" mode while we're trying | |
995 | * to check "search" mode, or a prior "search" mode after we've moved | |
996 | * to a new "search" mode (which might become the new "active" mode). | |
997 | */ | |
998 | table = &lq_sta->lq; | |
5aa33553 ES |
999 | ucode_rate = le32_to_cpu(table->rs_table[0]); |
1000 | rs_rate_from_ucode_rate(ucode_rate, info->band, &rate); | |
8ca151b5 | 1001 | if (info->band == IEEE80211_BAND_5GHZ) |
5aa33553 | 1002 | rate.index -= IWL_FIRST_OFDM_RATE; |
8ca151b5 JB |
1003 | mac_flags = info->status.rates[0].flags; |
1004 | mac_index = info->status.rates[0].idx; | |
1005 | /* For HT packets, map MCS to PLCP */ | |
1006 | if (mac_flags & IEEE80211_TX_RC_MCS) { | |
1007 | /* Remove # of streams */ | |
1008 | mac_index &= RATE_HT_MCS_RATE_CODE_MSK; | |
1009 | if (mac_index >= (IWL_RATE_9M_INDEX - IWL_FIRST_OFDM_RATE)) | |
1010 | mac_index++; | |
1011 | /* | |
1012 | * mac80211 HT index is always zero-indexed; we need to move | |
1013 | * HT OFDM rates after CCK rates in 2.4 GHz band | |
1014 | */ | |
1015 | if (info->band == IEEE80211_BAND_2GHZ) | |
1016 | mac_index += IWL_FIRST_OFDM_RATE; | |
d310e405 ES |
1017 | } else if (mac_flags & IEEE80211_TX_RC_VHT_MCS) { |
1018 | mac_index &= RATE_VHT_MCS_RATE_CODE_MSK; | |
1019 | if (mac_index >= (IWL_RATE_9M_INDEX - IWL_FIRST_OFDM_RATE)) | |
1020 | mac_index++; | |
8ca151b5 | 1021 | } |
d310e405 | 1022 | |
8ca151b5 JB |
1023 | /* Here we actually compare this rate to the latest LQ command */ |
1024 | if ((mac_index < 0) || | |
5aa33553 ES |
1025 | (rate.sgi != !!(mac_flags & IEEE80211_TX_RC_SHORT_GI)) || |
1026 | (rate.bw != rs_ch_width_from_mac_flags(mac_flags)) || | |
1027 | (rate.ant != info->status.antenna) || | |
1028 | (!!(ucode_rate & RATE_MCS_HT_MSK) != | |
d310e405 | 1029 | !!(mac_flags & IEEE80211_TX_RC_MCS)) || |
5aa33553 | 1030 | (!!(ucode_rate & RATE_MCS_VHT_MSK) != |
d310e405 | 1031 | !!(mac_flags & IEEE80211_TX_RC_VHT_MCS)) || |
5aa33553 | 1032 | (!!(ucode_rate & RATE_HT_MCS_GF_MSK) != |
d310e405 | 1033 | !!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD)) || |
5aa33553 | 1034 | (rate.index != mac_index)) { |
8ca151b5 JB |
1035 | IWL_DEBUG_RATE(mvm, |
1036 | "initial rate %d does not match %d (0x%x)\n", | |
5aa33553 | 1037 | mac_index, rate.index, ucode_rate); |
8ca151b5 JB |
1038 | /* |
1039 | * Since rates mis-match, the last LQ command may have failed. | |
1040 | * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with | |
1041 | * ... driver. | |
1042 | */ | |
1043 | lq_sta->missed_rate_counter++; | |
1044 | if (lq_sta->missed_rate_counter > IWL_MISSED_RATE_MAX) { | |
1045 | lq_sta->missed_rate_counter = 0; | |
b3b06a32 ES |
1046 | IWL_DEBUG_RATE(mvm, |
1047 | "Too many rates mismatch. Send sync LQ. rs_state %d\n", | |
1048 | lq_sta->rs_state); | |
9e680946 | 1049 | iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false); |
8ca151b5 JB |
1050 | } |
1051 | /* Regardless, ignore this status info for outdated rate */ | |
1052 | return; | |
1053 | } else | |
1054 | /* Rate did match, so reset the missed_rate_counter */ | |
1055 | lq_sta->missed_rate_counter = 0; | |
1056 | ||
1057 | /* Figure out if rate scale algorithm is in active or search table */ | |
5aa33553 ES |
1058 | if (rs_rate_match(&rate, |
1059 | &(lq_sta->lq_info[lq_sta->active_tbl].rate))) { | |
8ca151b5 JB |
1060 | curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1061 | other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); | |
5aa33553 ES |
1062 | } else if (rs_rate_match(&rate, |
1063 | &lq_sta->lq_info[1 - lq_sta->active_tbl].rate)) { | |
8ca151b5 JB |
1064 | curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); |
1065 | other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1066 | } else { | |
1067 | IWL_DEBUG_RATE(mvm, | |
1068 | "Neither active nor search matches tx rate\n"); | |
1069 | tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
5aa33553 | 1070 | rs_dump_rate(mvm, &tmp_tbl->rate, "ACTIVE"); |
8ca151b5 | 1071 | tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); |
5aa33553 ES |
1072 | rs_dump_rate(mvm, &tmp_tbl->rate, "SEARCH"); |
1073 | rs_dump_rate(mvm, &rate, "ACTUAL"); | |
1074 | ||
8ca151b5 JB |
1075 | /* |
1076 | * no matching table found, let's by-pass the data collection | |
1077 | * and continue to perform rate scale to find the rate table | |
1078 | */ | |
1079 | rs_stay_in_table(lq_sta, true); | |
1080 | goto done; | |
1081 | } | |
1082 | ||
1083 | /* | |
1084 | * Updating the frame history depends on whether packets were | |
1085 | * aggregated. | |
1086 | * | |
1087 | * For aggregation, all packets were transmitted at the same rate, the | |
1088 | * first index into rate scale table. | |
1089 | */ | |
1090 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { | |
5aa33553 ES |
1091 | ucode_rate = le32_to_cpu(table->rs_table[0]); |
1092 | rs_rate_from_ucode_rate(ucode_rate, info->band, &rate); | |
1093 | rs_collect_tx_data(curr_tbl, rate.index, | |
8ca151b5 JB |
1094 | info->status.ampdu_len, |
1095 | info->status.ampdu_ack_len); | |
1096 | ||
1097 | /* Update success/fail counts if not searching for new mode */ | |
b3b06a32 | 1098 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { |
8ca151b5 JB |
1099 | lq_sta->total_success += info->status.ampdu_ack_len; |
1100 | lq_sta->total_failed += (info->status.ampdu_len - | |
1101 | info->status.ampdu_ack_len); | |
1102 | } | |
1103 | } else { | |
1104 | /* | |
1105 | * For legacy, update frame history with for each Tx retry. | |
1106 | */ | |
1107 | retries = info->status.rates[0].count - 1; | |
1108 | /* HW doesn't send more than 15 retries */ | |
1109 | retries = min(retries, 15); | |
1110 | ||
1111 | /* The last transmission may have been successful */ | |
1112 | legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK); | |
1113 | /* Collect data for each rate used during failed TX attempts */ | |
1114 | for (i = 0; i <= retries; ++i) { | |
5aa33553 ES |
1115 | ucode_rate = le32_to_cpu(table->rs_table[i]); |
1116 | rs_rate_from_ucode_rate(ucode_rate, info->band, &rate); | |
8ca151b5 JB |
1117 | /* |
1118 | * Only collect stats if retried rate is in the same RS | |
1119 | * table as active/search. | |
1120 | */ | |
5aa33553 | 1121 | if (rs_rate_match(&rate, &curr_tbl->rate)) |
8ca151b5 | 1122 | tmp_tbl = curr_tbl; |
5aa33553 | 1123 | else if (rs_rate_match(&rate, &other_tbl->rate)) |
8ca151b5 | 1124 | tmp_tbl = other_tbl; |
4107dbd2 | 1125 | else |
8ca151b5 | 1126 | continue; |
4107dbd2 | 1127 | |
5aa33553 | 1128 | rs_collect_tx_data(tmp_tbl, rate.index, 1, |
8ca151b5 JB |
1129 | i < retries ? 0 : legacy_success); |
1130 | } | |
1131 | ||
1132 | /* Update success/fail counts if not searching for new mode */ | |
b3b06a32 | 1133 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { |
8ca151b5 JB |
1134 | lq_sta->total_success += legacy_success; |
1135 | lq_sta->total_failed += retries + (1 - legacy_success); | |
1136 | } | |
1137 | } | |
1138 | /* The last TX rate is cached in lq_sta; it's set in if/else above */ | |
5aa33553 | 1139 | lq_sta->last_rate_n_flags = ucode_rate; |
8ca151b5 JB |
1140 | done: |
1141 | /* See if there's a better rate or modulation mode to try. */ | |
1142 | if (sta && sta->supp_rates[sband->band]) | |
1143 | rs_rate_scale_perform(mvm, skb, sta, lq_sta); | |
1144 | } | |
1145 | ||
1146 | /* | |
1147 | * Begin a period of staying with a selected modulation mode. | |
1148 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
1149 | * Set frame tx success limits according to legacy vs. high-throughput, | |
1150 | * and reset overall (spanning all rates) tx success history statistics. | |
1151 | * These control how long we stay using same modulation mode before | |
1152 | * searching for a new mode. | |
1153 | */ | |
1154 | static void rs_set_stay_in_table(struct iwl_mvm *mvm, u8 is_legacy, | |
1155 | struct iwl_lq_sta *lq_sta) | |
1156 | { | |
b3b06a32 ES |
1157 | IWL_DEBUG_RATE(mvm, "Moving to RS_STATE_STAY_IN_COLUMN\n"); |
1158 | lq_sta->rs_state = RS_STATE_STAY_IN_COLUMN; | |
8ca151b5 JB |
1159 | if (is_legacy) { |
1160 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; | |
1161 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
1162 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
1163 | } else { | |
1164 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; | |
1165 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
1166 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
1167 | } | |
1168 | lq_sta->table_count = 0; | |
1169 | lq_sta->total_failed = 0; | |
1170 | lq_sta->total_success = 0; | |
1171 | lq_sta->flush_timer = jiffies; | |
b3b06a32 | 1172 | lq_sta->visited_columns = 0; |
8ca151b5 JB |
1173 | } |
1174 | ||
b3b06a32 ES |
1175 | static s32 *rs_get_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
1176 | const struct rs_tx_column *column, | |
1177 | u32 bw) | |
8ca151b5 JB |
1178 | { |
1179 | /* Used to choose among HT tables */ | |
1180 | s32 (*ht_tbl_pointer)[IWL_RATE_COUNT]; | |
1181 | ||
b3b06a32 ES |
1182 | if (WARN_ON_ONCE(column->mode != RS_LEGACY && |
1183 | column->mode != RS_SISO && | |
1184 | column->mode != RS_MIMO2)) | |
1185 | return expected_tpt_legacy; | |
8ca151b5 JB |
1186 | |
1187 | /* Legacy rates have only one table */ | |
b3b06a32 ES |
1188 | if (column->mode == RS_LEGACY) |
1189 | return expected_tpt_legacy; | |
8ca151b5 | 1190 | |
d310e405 | 1191 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; |
8ca151b5 | 1192 | /* Choose among many HT tables depending on number of streams |
d310e405 | 1193 | * (SISO/MIMO2), channel width (20/40/80), SGI, and aggregation |
8ca151b5 | 1194 | * status */ |
b3b06a32 ES |
1195 | if (column->mode == RS_SISO) { |
1196 | switch (bw) { | |
d310e405 ES |
1197 | case RATE_MCS_CHAN_WIDTH_20: |
1198 | ht_tbl_pointer = expected_tpt_siso_20MHz; | |
1199 | break; | |
1200 | case RATE_MCS_CHAN_WIDTH_40: | |
1201 | ht_tbl_pointer = expected_tpt_siso_40MHz; | |
1202 | break; | |
1203 | case RATE_MCS_CHAN_WIDTH_80: | |
1204 | ht_tbl_pointer = expected_tpt_siso_80MHz; | |
1205 | break; | |
1206 | default: | |
1207 | WARN_ON_ONCE(1); | |
1208 | } | |
b3b06a32 ES |
1209 | } else if (column->mode == RS_MIMO2) { |
1210 | switch (bw) { | |
d310e405 ES |
1211 | case RATE_MCS_CHAN_WIDTH_20: |
1212 | ht_tbl_pointer = expected_tpt_mimo2_20MHz; | |
1213 | break; | |
1214 | case RATE_MCS_CHAN_WIDTH_40: | |
1215 | ht_tbl_pointer = expected_tpt_mimo2_40MHz; | |
1216 | break; | |
1217 | case RATE_MCS_CHAN_WIDTH_80: | |
1218 | ht_tbl_pointer = expected_tpt_mimo2_80MHz; | |
1219 | break; | |
1220 | default: | |
1221 | WARN_ON_ONCE(1); | |
1222 | } | |
1223 | } else { | |
1224 | WARN_ON_ONCE(1); | |
d972ab31 | 1225 | } |
8ca151b5 | 1226 | |
b3b06a32 ES |
1227 | if (!column->sgi && !lq_sta->is_agg) /* Normal */ |
1228 | return ht_tbl_pointer[0]; | |
1229 | else if (column->sgi && !lq_sta->is_agg) /* SGI */ | |
1230 | return ht_tbl_pointer[1]; | |
1231 | else if (!column->sgi && lq_sta->is_agg) /* AGG */ | |
1232 | return ht_tbl_pointer[2]; | |
8ca151b5 | 1233 | else /* AGG+SGI */ |
b3b06a32 ES |
1234 | return ht_tbl_pointer[3]; |
1235 | } | |
1236 | ||
1237 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, | |
1238 | struct iwl_scale_tbl_info *tbl) | |
1239 | { | |
1240 | struct rs_rate *rate = &tbl->rate; | |
1241 | const struct rs_tx_column *column = &rs_tx_columns[tbl->column]; | |
1242 | ||
1243 | tbl->expected_tpt = rs_get_expected_tpt_table(lq_sta, column, rate->bw); | |
8ca151b5 JB |
1244 | } |
1245 | ||
1246 | /* | |
1247 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1248 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1249 | * above the current measured throughput of "active" mode, to give new mode | |
1250 | * a fair chance to prove itself without too many challenges. | |
1251 | * | |
1252 | * This gets called when transitioning to more aggressive modulation | |
1253 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1254 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1255 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1256 | * bit rate will typically need to increase, but not if performance was bad. | |
1257 | */ | |
1258 | static s32 rs_get_best_rate(struct iwl_mvm *mvm, | |
1259 | struct iwl_lq_sta *lq_sta, | |
1260 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
1261 | u16 rate_mask, s8 index) | |
1262 | { | |
1263 | /* "active" values */ | |
1264 | struct iwl_scale_tbl_info *active_tbl = | |
1265 | &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1266 | s32 active_sr = active_tbl->win[index].success_ratio; | |
1267 | s32 active_tpt = active_tbl->expected_tpt[index]; | |
1268 | ||
1269 | /* expected "search" throughput */ | |
1270 | s32 *tpt_tbl = tbl->expected_tpt; | |
1271 | ||
1272 | s32 new_rate, high, low, start_hi; | |
1273 | u16 high_low; | |
1274 | s8 rate = index; | |
1275 | ||
1276 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1277 | ||
1278 | while (1) { | |
1279 | high_low = rs_get_adjacent_rate(mvm, rate, rate_mask, | |
5aa33553 | 1280 | tbl->rate.type); |
8ca151b5 JB |
1281 | |
1282 | low = high_low & 0xff; | |
1283 | high = (high_low >> 8) & 0xff; | |
1284 | ||
1285 | /* | |
1286 | * Lower the "search" bit rate, to give new "search" mode | |
1287 | * approximately the same throughput as "active" if: | |
1288 | * | |
1289 | * 1) "Active" mode has been working modestly well (but not | |
1290 | * great), and expected "search" throughput (under perfect | |
1291 | * conditions) at candidate rate is above the actual | |
1292 | * measured "active" throughput (but less than expected | |
1293 | * "active" throughput under perfect conditions). | |
1294 | * OR | |
1295 | * 2) "Active" mode has been working perfectly or very well | |
1296 | * and expected "search" throughput (under perfect | |
1297 | * conditions) at candidate rate is above expected | |
1298 | * "active" throughput (under perfect conditions). | |
1299 | */ | |
1300 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && | |
c48075d2 | 1301 | ((active_sr > RS_SR_FORCE_DECREASE) && |
8ca151b5 JB |
1302 | (active_sr <= IWL_RATE_HIGH_TH) && |
1303 | (tpt_tbl[rate] <= active_tpt))) || | |
1304 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1305 | (tpt_tbl[rate] > active_tpt))) { | |
1306 | /* (2nd or later pass) | |
1307 | * If we've already tried to raise the rate, and are | |
1308 | * now trying to lower it, use the higher rate. */ | |
1309 | if (start_hi != IWL_RATE_INVALID) { | |
1310 | new_rate = start_hi; | |
1311 | break; | |
1312 | } | |
1313 | ||
1314 | new_rate = rate; | |
1315 | ||
1316 | /* Loop again with lower rate */ | |
1317 | if (low != IWL_RATE_INVALID) | |
1318 | rate = low; | |
1319 | ||
1320 | /* Lower rate not available, use the original */ | |
1321 | else | |
1322 | break; | |
1323 | ||
1324 | /* Else try to raise the "search" rate to match "active" */ | |
1325 | } else { | |
1326 | /* (2nd or later pass) | |
1327 | * If we've already tried to lower the rate, and are | |
1328 | * now trying to raise it, use the lower rate. */ | |
1329 | if (new_rate != IWL_RATE_INVALID) | |
1330 | break; | |
1331 | ||
1332 | /* Loop again with higher rate */ | |
1333 | else if (high != IWL_RATE_INVALID) { | |
1334 | start_hi = high; | |
1335 | rate = high; | |
1336 | ||
1337 | /* Higher rate not available, use the original */ | |
1338 | } else { | |
1339 | new_rate = rate; | |
1340 | break; | |
1341 | } | |
1342 | } | |
1343 | } | |
1344 | ||
1345 | return new_rate; | |
1346 | } | |
1347 | ||
5aa33553 | 1348 | static u32 rs_bw_from_sta_bw(struct ieee80211_sta *sta) |
d310e405 ES |
1349 | { |
1350 | if (sta->bandwidth >= IEEE80211_STA_RX_BW_80) | |
5aa33553 | 1351 | return RATE_MCS_CHAN_WIDTH_80; |
d310e405 | 1352 | else if (sta->bandwidth >= IEEE80211_STA_RX_BW_40) |
5aa33553 ES |
1353 | return RATE_MCS_CHAN_WIDTH_40; |
1354 | ||
1355 | return RATE_MCS_CHAN_WIDTH_20; | |
d310e405 ES |
1356 | } |
1357 | ||
8ca151b5 JB |
1358 | /* |
1359 | * Check whether we should continue using same modulation mode, or | |
1360 | * begin search for a new mode, based on: | |
1361 | * 1) # tx successes or failures while using this mode | |
1362 | * 2) # times calling this function | |
1363 | * 3) elapsed time in this mode (not used, for now) | |
1364 | */ | |
1365 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search) | |
1366 | { | |
1367 | struct iwl_scale_tbl_info *tbl; | |
1368 | int i; | |
1369 | int active_tbl; | |
1370 | int flush_interval_passed = 0; | |
1371 | struct iwl_mvm *mvm; | |
1372 | ||
1373 | mvm = lq_sta->drv; | |
1374 | active_tbl = lq_sta->active_tbl; | |
1375 | ||
1376 | tbl = &(lq_sta->lq_info[active_tbl]); | |
1377 | ||
1378 | /* If we've been disallowing search, see if we should now allow it */ | |
b3b06a32 | 1379 | if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { |
8ca151b5 JB |
1380 | /* Elapsed time using current modulation mode */ |
1381 | if (lq_sta->flush_timer) | |
1382 | flush_interval_passed = | |
1383 | time_after(jiffies, | |
1384 | (unsigned long)(lq_sta->flush_timer + | |
32b01726 | 1385 | RS_STAY_IN_COLUMN_TIMEOUT)); |
8ca151b5 JB |
1386 | |
1387 | /* | |
1388 | * Check if we should allow search for new modulation mode. | |
1389 | * If many frames have failed or succeeded, or we've used | |
1390 | * this same modulation for a long time, allow search, and | |
1391 | * reset history stats that keep track of whether we should | |
1392 | * allow a new search. Also (below) reset all bitmaps and | |
1393 | * stats in active history. | |
1394 | */ | |
1395 | if (force_search || | |
1396 | (lq_sta->total_failed > lq_sta->max_failure_limit) || | |
1397 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1398 | ((!lq_sta->search_better_tbl) && | |
1399 | (lq_sta->flush_timer) && (flush_interval_passed))) { | |
1400 | IWL_DEBUG_RATE(mvm, | |
1401 | "LQ: stay is expired %d %d %d\n", | |
1402 | lq_sta->total_failed, | |
1403 | lq_sta->total_success, | |
1404 | flush_interval_passed); | |
1405 | ||
1406 | /* Allow search for new mode */ | |
b3b06a32 ES |
1407 | lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_STARTED; |
1408 | IWL_DEBUG_RATE(mvm, | |
1409 | "Moving to RS_STATE_SEARCH_CYCLE_STARTED\n"); | |
8ca151b5 JB |
1410 | lq_sta->total_failed = 0; |
1411 | lq_sta->total_success = 0; | |
1412 | lq_sta->flush_timer = 0; | |
b3b06a32 ES |
1413 | /* mark the current column as visited */ |
1414 | lq_sta->visited_columns = BIT(tbl->column); | |
8ca151b5 JB |
1415 | /* |
1416 | * Else if we've used this modulation mode enough repetitions | |
1417 | * (regardless of elapsed time or success/failure), reset | |
1418 | * history bitmaps and rate-specific stats for all rates in | |
1419 | * active table. | |
1420 | */ | |
1421 | } else { | |
1422 | lq_sta->table_count++; | |
1423 | if (lq_sta->table_count >= | |
1424 | lq_sta->table_count_limit) { | |
1425 | lq_sta->table_count = 0; | |
1426 | ||
1427 | IWL_DEBUG_RATE(mvm, | |
1428 | "LQ: stay in table clear win\n"); | |
1429 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
1430 | rs_rate_scale_clear_window( | |
1431 | &(tbl->win[i])); | |
1432 | } | |
1433 | } | |
1434 | ||
1435 | /* If transitioning to allow "search", reset all history | |
1436 | * bitmaps and stats in active table (this will become the new | |
1437 | * "search" table). */ | |
b3b06a32 ES |
1438 | if (lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED) { |
1439 | IWL_DEBUG_RATE(mvm, "Clearing up window stats\n"); | |
8ca151b5 JB |
1440 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1441 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1442 | } | |
1443 | } | |
1444 | } | |
1445 | ||
1446 | /* | |
1447 | * setup rate table in uCode | |
1448 | */ | |
1449 | static void rs_update_rate_tbl(struct iwl_mvm *mvm, | |
9145d151 | 1450 | struct ieee80211_sta *sta, |
8ca151b5 | 1451 | struct iwl_lq_sta *lq_sta, |
5aa33553 | 1452 | struct rs_rate *rate) |
8ca151b5 | 1453 | { |
8fc7c58c | 1454 | rs_fill_lq_cmd(mvm, sta, lq_sta, rate); |
9e680946 | 1455 | iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false); |
8ca151b5 JB |
1456 | } |
1457 | ||
977342bc ES |
1458 | static u8 rs_get_tid(struct iwl_lq_sta *lq_data, |
1459 | struct ieee80211_hdr *hdr) | |
1460 | { | |
1461 | u8 tid = IWL_MAX_TID_COUNT; | |
1462 | ||
1463 | if (ieee80211_is_data_qos(hdr->frame_control)) { | |
1464 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
1465 | tid = qc[0] & 0xf; | |
1466 | } | |
1467 | ||
1468 | if (unlikely(tid > IWL_MAX_TID_COUNT)) | |
1469 | tid = IWL_MAX_TID_COUNT; | |
1470 | ||
1471 | return tid; | |
1472 | } | |
1473 | ||
b3b06a32 ES |
1474 | static enum rs_column rs_get_next_column(struct iwl_mvm *mvm, |
1475 | struct iwl_lq_sta *lq_sta, | |
1476 | struct ieee80211_sta *sta, | |
1477 | struct iwl_scale_tbl_info *tbl) | |
1478 | { | |
1479 | int i, j, n; | |
1480 | enum rs_column next_col_id; | |
1481 | const struct rs_tx_column *curr_col = &rs_tx_columns[tbl->column]; | |
1482 | const struct rs_tx_column *next_col; | |
1483 | allow_column_func_t allow_func; | |
1484 | u8 valid_ants = iwl_fw_valid_tx_ant(mvm->fw); | |
1485 | s32 *expected_tpt_tbl; | |
1486 | s32 tpt, max_expected_tpt; | |
1487 | ||
1488 | for (i = 0; i < MAX_NEXT_COLUMNS; i++) { | |
1489 | next_col_id = curr_col->next_columns[i]; | |
1490 | ||
1491 | if (next_col_id == RS_COLUMN_INVALID) | |
1492 | continue; | |
1493 | ||
1494 | if (lq_sta->visited_columns & BIT(next_col_id)) { | |
1495 | IWL_DEBUG_RATE(mvm, "Skip already visited column %d\n", | |
1496 | next_col_id); | |
1497 | continue; | |
1498 | } | |
1499 | ||
1500 | next_col = &rs_tx_columns[next_col_id]; | |
1501 | ||
1502 | if (!rs_is_valid_ant(valid_ants, next_col->ant)) { | |
1503 | IWL_DEBUG_RATE(mvm, | |
1504 | "Skip column %d as ANT config isn't supported by chip. valid_ants 0x%x column ant 0x%x\n", | |
1505 | next_col_id, valid_ants, next_col->ant); | |
1506 | continue; | |
1507 | } | |
1508 | ||
1509 | for (j = 0; j < MAX_COLUMN_CHECKS; j++) { | |
1510 | allow_func = next_col->checks[j]; | |
1511 | if (allow_func && !allow_func(mvm, sta, tbl)) | |
1512 | break; | |
1513 | } | |
1514 | ||
1515 | if (j != MAX_COLUMN_CHECKS) { | |
1516 | IWL_DEBUG_RATE(mvm, | |
1517 | "Skip column %d: not allowed (check %d failed)\n", | |
1518 | next_col_id, j); | |
1519 | ||
1520 | continue; | |
1521 | } | |
1522 | ||
1523 | tpt = lq_sta->last_tpt / 100; | |
1524 | expected_tpt_tbl = rs_get_expected_tpt_table(lq_sta, next_col, | |
1525 | tbl->rate.bw); | |
1526 | if (WARN_ON_ONCE(!expected_tpt_tbl)) | |
1527 | continue; | |
1528 | ||
1529 | max_expected_tpt = 0; | |
1530 | for (n = 0; n < IWL_RATE_COUNT; n++) | |
1531 | if (expected_tpt_tbl[n] > max_expected_tpt) | |
1532 | max_expected_tpt = expected_tpt_tbl[n]; | |
1533 | ||
1534 | if (tpt >= max_expected_tpt) { | |
1535 | IWL_DEBUG_RATE(mvm, | |
1536 | "Skip column %d: can't beat current TPT. Max expected %d current %d\n", | |
1537 | next_col_id, max_expected_tpt, tpt); | |
1538 | continue; | |
1539 | } | |
1540 | ||
1541 | break; | |
1542 | } | |
1543 | ||
1544 | if (i == MAX_NEXT_COLUMNS) | |
1545 | return RS_COLUMN_INVALID; | |
1546 | ||
1547 | IWL_DEBUG_RATE(mvm, "Found potential column %d\n", next_col_id); | |
1548 | ||
1549 | return next_col_id; | |
1550 | } | |
1551 | ||
1552 | static int rs_switch_to_column(struct iwl_mvm *mvm, | |
1553 | struct iwl_lq_sta *lq_sta, | |
1554 | struct ieee80211_sta *sta, | |
1555 | enum rs_column col_id) | |
1556 | { | |
1557 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1558 | struct iwl_scale_tbl_info *search_tbl = | |
1559 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1560 | struct rs_rate *rate = &search_tbl->rate; | |
1561 | const struct rs_tx_column *column = &rs_tx_columns[col_id]; | |
1562 | const struct rs_tx_column *curr_column = &rs_tx_columns[tbl->column]; | |
1563 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1564 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1565 | u16 rate_mask = 0; | |
1566 | u32 rate_idx = 0; | |
1567 | ||
1568 | memcpy(search_tbl, tbl, sz); | |
1569 | ||
1570 | rate->sgi = column->sgi; | |
1571 | rate->ant = column->ant; | |
1572 | ||
1573 | if (column->mode == RS_LEGACY) { | |
1574 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
1575 | rate->type = LQ_LEGACY_A; | |
1576 | else | |
1577 | rate->type = LQ_LEGACY_G; | |
1578 | ||
1579 | rate_mask = lq_sta->active_legacy_rate; | |
1580 | } else if (column->mode == RS_SISO) { | |
1581 | rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO; | |
1582 | rate_mask = lq_sta->active_siso_rate; | |
1583 | } else if (column->mode == RS_MIMO2) { | |
1584 | rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2; | |
1585 | rate_mask = lq_sta->active_mimo2_rate; | |
1586 | } else { | |
1587 | WARN_ON_ONCE("Bad column mode"); | |
1588 | } | |
1589 | ||
1590 | rate->bw = rs_bw_from_sta_bw(sta); | |
1591 | search_tbl->column = col_id; | |
1592 | rs_set_expected_tpt_table(lq_sta, search_tbl); | |
1593 | ||
1594 | /* Get the best matching rate if we're changing modes. e.g. | |
1595 | * SISO->MIMO, LEGACY->SISO, MIMO->SISO | |
1596 | */ | |
1597 | if (curr_column->mode != column->mode) { | |
1598 | rate_idx = rs_get_best_rate(mvm, lq_sta, search_tbl, | |
1599 | rate_mask, rate->index); | |
1600 | ||
1601 | if ((rate_idx == IWL_RATE_INVALID) || | |
1602 | !(BIT(rate_idx) & rate_mask)) { | |
1603 | IWL_DEBUG_RATE(mvm, | |
1604 | "can not switch with index %d" | |
1605 | " rate mask %x\n", | |
1606 | rate_idx, rate_mask); | |
1607 | ||
1608 | goto err; | |
1609 | } | |
1610 | ||
1611 | rate->index = rate_idx; | |
1612 | } | |
1613 | ||
b3b06a32 ES |
1614 | IWL_DEBUG_RATE(mvm, "Switched to column %d: Index %d\n", |
1615 | col_id, rate->index); | |
1616 | ||
1617 | lq_sta->visited_columns |= BIT(col_id); | |
1618 | return 0; | |
1619 | ||
1620 | err: | |
1621 | rate->type = LQ_NONE; | |
1622 | return -1; | |
1623 | } | |
1624 | ||
4e4b815c ES |
1625 | static enum rs_action rs_get_rate_action(struct iwl_mvm *mvm, |
1626 | struct iwl_scale_tbl_info *tbl, | |
1627 | s32 sr, int low, int high, | |
1628 | int current_tpt, | |
1629 | int low_tpt, int high_tpt) | |
1630 | { | |
1631 | enum rs_action action = RS_ACTION_STAY; | |
1632 | ||
1633 | /* Too many failures, decrease rate */ | |
1634 | if ((sr <= RS_SR_FORCE_DECREASE) || (current_tpt == 0)) { | |
1635 | IWL_DEBUG_RATE(mvm, | |
1636 | "decrease rate because of low SR\n"); | |
1637 | action = RS_ACTION_DOWNSCALE; | |
1638 | /* No throughput measured yet for adjacent rates; try increase. */ | |
1639 | } else if ((low_tpt == IWL_INVALID_VALUE) && | |
1640 | (high_tpt == IWL_INVALID_VALUE)) { | |
1641 | if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH) { | |
1642 | IWL_DEBUG_RATE(mvm, | |
1643 | "Good SR and no high rate measurement. " | |
1644 | "Increase rate\n"); | |
1645 | action = RS_ACTION_UPSCALE; | |
1646 | } else if (low != IWL_RATE_INVALID) { | |
1647 | IWL_DEBUG_RATE(mvm, | |
1648 | "Remain in current rate\n"); | |
1649 | action = RS_ACTION_STAY; | |
1650 | } | |
1651 | } | |
1652 | ||
1653 | /* Both adjacent throughputs are measured, but neither one has better | |
1654 | * throughput; we're using the best rate, don't change it! | |
1655 | */ | |
1656 | else if ((low_tpt != IWL_INVALID_VALUE) && | |
1657 | (high_tpt != IWL_INVALID_VALUE) && | |
1658 | (low_tpt < current_tpt) && | |
1659 | (high_tpt < current_tpt)) { | |
1660 | IWL_DEBUG_RATE(mvm, | |
1661 | "Both high and low are worse. " | |
1662 | "Maintain rate\n"); | |
1663 | action = RS_ACTION_STAY; | |
1664 | } | |
1665 | ||
1666 | /* At least one adjacent rate's throughput is measured, | |
1667 | * and may have better performance. | |
1668 | */ | |
1669 | else { | |
1670 | /* Higher adjacent rate's throughput is measured */ | |
1671 | if (high_tpt != IWL_INVALID_VALUE) { | |
1672 | /* Higher rate has better throughput */ | |
1673 | if (high_tpt > current_tpt && | |
1674 | sr >= IWL_RATE_INCREASE_TH) { | |
1675 | IWL_DEBUG_RATE(mvm, | |
1676 | "Higher rate is better and good " | |
1677 | "SR. Increate rate\n"); | |
1678 | action = RS_ACTION_UPSCALE; | |
1679 | } else { | |
1680 | IWL_DEBUG_RATE(mvm, | |
1681 | "Higher rate isn't better OR " | |
1682 | "no good SR. Maintain rate\n"); | |
1683 | action = RS_ACTION_STAY; | |
1684 | } | |
1685 | ||
1686 | /* Lower adjacent rate's throughput is measured */ | |
1687 | } else if (low_tpt != IWL_INVALID_VALUE) { | |
1688 | /* Lower rate has better throughput */ | |
1689 | if (low_tpt > current_tpt) { | |
1690 | IWL_DEBUG_RATE(mvm, | |
1691 | "Lower rate is better. " | |
1692 | "Decrease rate\n"); | |
1693 | action = RS_ACTION_DOWNSCALE; | |
1694 | } else if (sr >= IWL_RATE_INCREASE_TH) { | |
1695 | IWL_DEBUG_RATE(mvm, | |
1696 | "Lower rate isn't better and " | |
1697 | "good SR. Increase rate\n"); | |
1698 | action = RS_ACTION_UPSCALE; | |
1699 | } | |
1700 | } | |
1701 | } | |
1702 | ||
1703 | /* Sanity check; asked for decrease, but success rate or throughput | |
1704 | * has been good at old rate. Don't change it. | |
1705 | */ | |
1706 | if ((action == RS_ACTION_DOWNSCALE) && (low != IWL_RATE_INVALID) && | |
1707 | ((sr > IWL_RATE_HIGH_TH) || | |
1708 | (current_tpt > (100 * tbl->expected_tpt[low])))) { | |
1709 | IWL_DEBUG_RATE(mvm, | |
1710 | "Sanity check failed. Maintain rate\n"); | |
1711 | action = RS_ACTION_STAY; | |
1712 | } | |
1713 | ||
1714 | return action; | |
1715 | } | |
b3b06a32 | 1716 | |
8ca151b5 JB |
1717 | /* |
1718 | * Do rate scaling and search for new modulation mode. | |
1719 | */ | |
1720 | static void rs_rate_scale_perform(struct iwl_mvm *mvm, | |
1721 | struct sk_buff *skb, | |
1722 | struct ieee80211_sta *sta, | |
1723 | struct iwl_lq_sta *lq_sta) | |
1724 | { | |
1725 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1726 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1727 | int low = IWL_RATE_INVALID; | |
1728 | int high = IWL_RATE_INVALID; | |
1729 | int index; | |
1730 | int i; | |
1731 | struct iwl_rate_scale_data *window = NULL; | |
1732 | int current_tpt = IWL_INVALID_VALUE; | |
1733 | int low_tpt = IWL_INVALID_VALUE; | |
1734 | int high_tpt = IWL_INVALID_VALUE; | |
1735 | u32 fail_count; | |
4e4b815c | 1736 | enum rs_action scale_action = RS_ACTION_STAY; |
8ca151b5 JB |
1737 | u16 rate_mask; |
1738 | u8 update_lq = 0; | |
1739 | struct iwl_scale_tbl_info *tbl, *tbl1; | |
8ca151b5 JB |
1740 | u8 active_tbl = 0; |
1741 | u8 done_search = 0; | |
1742 | u16 high_low; | |
1743 | s32 sr; | |
1744 | u8 tid = IWL_MAX_TID_COUNT; | |
9d015a03 | 1745 | u8 prev_agg = lq_sta->is_agg; |
8ca151b5 JB |
1746 | struct iwl_mvm_sta *sta_priv = (void *)sta->drv_priv; |
1747 | struct iwl_mvm_tid_data *tid_data; | |
5aa33553 | 1748 | struct rs_rate *rate; |
8ca151b5 | 1749 | |
8ca151b5 JB |
1750 | /* Send management frames and NO_ACK data using lowest rate. */ |
1751 | /* TODO: this could probably be improved.. */ | |
1752 | if (!ieee80211_is_data(hdr->frame_control) || | |
1753 | info->flags & IEEE80211_TX_CTL_NO_ACK) | |
1754 | return; | |
1755 | ||
977342bc | 1756 | tid = rs_get_tid(lq_sta, hdr); |
8ca151b5 JB |
1757 | if ((tid != IWL_MAX_TID_COUNT) && |
1758 | (lq_sta->tx_agg_tid_en & (1 << tid))) { | |
1759 | tid_data = &sta_priv->tid_data[tid]; | |
1760 | if (tid_data->state == IWL_AGG_OFF) | |
1761 | lq_sta->is_agg = 0; | |
1762 | else | |
1763 | lq_sta->is_agg = 1; | |
1764 | } else { | |
1765 | lq_sta->is_agg = 0; | |
1766 | } | |
1767 | ||
1768 | /* | |
1769 | * Select rate-scale / modulation-mode table to work with in | |
1770 | * the rest of this function: "search" if searching for better | |
1771 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1772 | */ | |
1773 | if (!lq_sta->search_better_tbl) | |
1774 | active_tbl = lq_sta->active_tbl; | |
1775 | else | |
1776 | active_tbl = 1 - lq_sta->active_tbl; | |
1777 | ||
1778 | tbl = &(lq_sta->lq_info[active_tbl]); | |
5aa33553 | 1779 | rate = &tbl->rate; |
8ca151b5 | 1780 | |
9d015a03 ES |
1781 | if (prev_agg != lq_sta->is_agg) { |
1782 | IWL_DEBUG_RATE(mvm, | |
1783 | "Aggregation changed: prev %d current %d. Update expected TPT table\n", | |
1784 | prev_agg, lq_sta->is_agg); | |
1785 | rs_set_expected_tpt_table(lq_sta, tbl); | |
1786 | } | |
1787 | ||
8ca151b5 JB |
1788 | /* current tx rate */ |
1789 | index = lq_sta->last_txrate_idx; | |
1790 | ||
8ca151b5 | 1791 | /* rates available for this association, and for modulation mode */ |
a8ff14f5 | 1792 | rate_mask = rs_get_supported_rates(lq_sta, rate); |
8ca151b5 | 1793 | |
ca6f38ff | 1794 | if (!(BIT(index) & rate_mask)) { |
8ca151b5 JB |
1795 | IWL_ERR(mvm, "Current Rate is not valid\n"); |
1796 | if (lq_sta->search_better_tbl) { | |
1797 | /* revert to active table if search table is not valid*/ | |
5aa33553 | 1798 | rate->type = LQ_NONE; |
8ca151b5 JB |
1799 | lq_sta->search_better_tbl = 0; |
1800 | tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
5aa33553 | 1801 | rs_update_rate_tbl(mvm, sta, lq_sta, &tbl->rate); |
8ca151b5 JB |
1802 | } |
1803 | return; | |
1804 | } | |
1805 | ||
1806 | /* Get expected throughput table and history window for current rate */ | |
1807 | if (!tbl->expected_tpt) { | |
1808 | IWL_ERR(mvm, "tbl->expected_tpt is NULL\n"); | |
1809 | return; | |
1810 | } | |
1811 | ||
1812 | /* force user max rate if set by user */ | |
1813 | if ((lq_sta->max_rate_idx != -1) && | |
1814 | (lq_sta->max_rate_idx < index)) { | |
1815 | index = lq_sta->max_rate_idx; | |
1816 | update_lq = 1; | |
1817 | window = &(tbl->win[index]); | |
4d30ee82 ES |
1818 | IWL_DEBUG_RATE(mvm, |
1819 | "Forcing user max rate %d\n", | |
1820 | index); | |
8ca151b5 JB |
1821 | goto lq_update; |
1822 | } | |
1823 | ||
1824 | window = &(tbl->win[index]); | |
1825 | ||
1826 | /* | |
1827 | * If there is not enough history to calculate actual average | |
1828 | * throughput, keep analyzing results of more tx frames, without | |
1829 | * changing rate or mode (bypass most of the rest of this function). | |
1830 | * Set up new rate table in uCode only if old rate is not supported | |
1831 | * in current association (use new rate found above). | |
1832 | */ | |
1833 | fail_count = window->counter - window->success_counter; | |
1834 | if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && | |
1835 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { | |
1836 | IWL_DEBUG_RATE(mvm, | |
4d30ee82 | 1837 | "(%s: %d): Test Window: succ %d total %d\n", |
5aa33553 | 1838 | rs_pretty_lq_type(rate->type), |
4d30ee82 | 1839 | index, window->success_counter, window->counter); |
8ca151b5 JB |
1840 | |
1841 | /* Can't calculate this yet; not enough history */ | |
1842 | window->average_tpt = IWL_INVALID_VALUE; | |
1843 | ||
1844 | /* Should we stay with this modulation mode, | |
1845 | * or search for a new one? */ | |
1846 | rs_stay_in_table(lq_sta, false); | |
1847 | ||
1848 | goto out; | |
1849 | } | |
1850 | /* Else we have enough samples; calculate estimate of | |
1851 | * actual average throughput */ | |
1852 | if (window->average_tpt != ((window->success_ratio * | |
1853 | tbl->expected_tpt[index] + 64) / 128)) { | |
8ca151b5 JB |
1854 | window->average_tpt = ((window->success_ratio * |
1855 | tbl->expected_tpt[index] + 64) / 128); | |
1856 | } | |
1857 | ||
1858 | /* If we are searching for better modulation mode, check success. */ | |
1859 | if (lq_sta->search_better_tbl) { | |
1860 | /* If good success, continue using the "search" mode; | |
1861 | * no need to send new link quality command, since we're | |
1862 | * continuing to use the setup that we've been trying. */ | |
1863 | if (window->average_tpt > lq_sta->last_tpt) { | |
1864 | IWL_DEBUG_RATE(mvm, | |
4d30ee82 ES |
1865 | "SWITCHING TO NEW TABLE SR: %d " |
1866 | "cur-tpt %d old-tpt %d\n", | |
8ca151b5 JB |
1867 | window->success_ratio, |
1868 | window->average_tpt, | |
1869 | lq_sta->last_tpt); | |
1870 | ||
8ca151b5 JB |
1871 | /* Swap tables; "search" becomes "active" */ |
1872 | lq_sta->active_tbl = active_tbl; | |
1873 | current_tpt = window->average_tpt; | |
1874 | /* Else poor success; go back to mode in "active" table */ | |
1875 | } else { | |
1876 | IWL_DEBUG_RATE(mvm, | |
4d30ee82 ES |
1877 | "GOING BACK TO THE OLD TABLE: SR %d " |
1878 | "cur-tpt %d old-tpt %d\n", | |
8ca151b5 JB |
1879 | window->success_ratio, |
1880 | window->average_tpt, | |
1881 | lq_sta->last_tpt); | |
1882 | ||
1883 | /* Nullify "search" table */ | |
5aa33553 | 1884 | rate->type = LQ_NONE; |
8ca151b5 JB |
1885 | |
1886 | /* Revert to "active" table */ | |
1887 | active_tbl = lq_sta->active_tbl; | |
1888 | tbl = &(lq_sta->lq_info[active_tbl]); | |
1889 | ||
1890 | /* Revert to "active" rate and throughput info */ | |
8fc7c58c | 1891 | index = tbl->rate.index; |
8ca151b5 JB |
1892 | current_tpt = lq_sta->last_tpt; |
1893 | ||
1894 | /* Need to set up a new rate table in uCode */ | |
1895 | update_lq = 1; | |
1896 | } | |
1897 | ||
1898 | /* Either way, we've made a decision; modulation mode | |
1899 | * search is done, allow rate adjustment next time. */ | |
1900 | lq_sta->search_better_tbl = 0; | |
1901 | done_search = 1; /* Don't switch modes below! */ | |
1902 | goto lq_update; | |
1903 | } | |
1904 | ||
1905 | /* (Else) not in search of better modulation mode, try for better | |
1906 | * starting rate, while staying in this mode. */ | |
ca6f38ff | 1907 | high_low = rs_get_adjacent_rate(mvm, index, rate_mask, rate->type); |
8ca151b5 JB |
1908 | low = high_low & 0xff; |
1909 | high = (high_low >> 8) & 0xff; | |
1910 | ||
1911 | /* If user set max rate, dont allow higher than user constrain */ | |
1912 | if ((lq_sta->max_rate_idx != -1) && | |
1913 | (lq_sta->max_rate_idx < high)) | |
1914 | high = IWL_RATE_INVALID; | |
1915 | ||
1916 | sr = window->success_ratio; | |
1917 | ||
1918 | /* Collect measured throughputs for current and adjacent rates */ | |
1919 | current_tpt = window->average_tpt; | |
1920 | if (low != IWL_RATE_INVALID) | |
1921 | low_tpt = tbl->win[low].average_tpt; | |
1922 | if (high != IWL_RATE_INVALID) | |
1923 | high_tpt = tbl->win[high].average_tpt; | |
1924 | ||
4d30ee82 ES |
1925 | IWL_DEBUG_RATE(mvm, |
1926 | "(%s: %d): cur_tpt %d SR %d low %d high %d low_tpt %d high_tpt %d\n", | |
5aa33553 ES |
1927 | rs_pretty_lq_type(rate->type), index, current_tpt, sr, |
1928 | low, high, low_tpt, high_tpt); | |
4d30ee82 | 1929 | |
4e4b815c ES |
1930 | scale_action = rs_get_rate_action(mvm, tbl, sr, low, high, |
1931 | current_tpt, low_tpt, high_tpt); | |
8ca151b5 | 1932 | |
393b9e5b | 1933 | /* Force a search in case BT doesn't like us being in MIMO */ |
5aa33553 | 1934 | if (is_mimo(rate) && |
393b9e5b | 1935 | !iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) { |
4d30ee82 ES |
1936 | IWL_DEBUG_RATE(mvm, |
1937 | "BT Coex forbids MIMO. Search for new config\n"); | |
36946ce6 EG |
1938 | rs_stay_in_table(lq_sta, true); |
1939 | goto lq_update; | |
1940 | } | |
1941 | ||
8ca151b5 | 1942 | switch (scale_action) { |
4e4b815c | 1943 | case RS_ACTION_DOWNSCALE: |
8ca151b5 JB |
1944 | /* Decrease starting rate, update uCode's rate table */ |
1945 | if (low != IWL_RATE_INVALID) { | |
1946 | update_lq = 1; | |
1947 | index = low; | |
4d30ee82 ES |
1948 | } else { |
1949 | IWL_DEBUG_RATE(mvm, | |
1950 | "At the bottom rate. Can't decrease\n"); | |
8ca151b5 JB |
1951 | } |
1952 | ||
1953 | break; | |
4e4b815c | 1954 | case RS_ACTION_UPSCALE: |
8ca151b5 JB |
1955 | /* Increase starting rate, update uCode's rate table */ |
1956 | if (high != IWL_RATE_INVALID) { | |
1957 | update_lq = 1; | |
1958 | index = high; | |
4d30ee82 ES |
1959 | } else { |
1960 | IWL_DEBUG_RATE(mvm, | |
1961 | "At the top rate. Can't increase\n"); | |
8ca151b5 JB |
1962 | } |
1963 | ||
1964 | break; | |
4e4b815c | 1965 | case RS_ACTION_STAY: |
8ca151b5 JB |
1966 | /* No change */ |
1967 | default: | |
1968 | break; | |
1969 | } | |
1970 | ||
8ca151b5 JB |
1971 | lq_update: |
1972 | /* Replace uCode's rate table for the destination station. */ | |
5aa33553 ES |
1973 | if (update_lq) { |
1974 | tbl->rate.index = index; | |
1975 | rs_update_rate_tbl(mvm, sta, lq_sta, &tbl->rate); | |
1976 | } | |
8ca151b5 JB |
1977 | |
1978 | rs_stay_in_table(lq_sta, false); | |
1979 | ||
1980 | /* | |
1981 | * Search for new modulation mode if we're: | |
1982 | * 1) Not changing rates right now | |
1983 | * 2) Not just finishing up a search | |
1984 | * 3) Allowing a new search | |
1985 | */ | |
1986 | if (!update_lq && !done_search && | |
b3b06a32 ES |
1987 | lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED |
1988 | && window->counter) { | |
1989 | enum rs_column next_column; | |
1990 | ||
8ca151b5 JB |
1991 | /* Save current throughput to compare with "search" throughput*/ |
1992 | lq_sta->last_tpt = current_tpt; | |
1993 | ||
4d30ee82 | 1994 | IWL_DEBUG_RATE(mvm, |
b3b06a32 ES |
1995 | "Start Search: update_lq %d done_search %d rs_state %d win->counter %d\n", |
1996 | update_lq, done_search, lq_sta->rs_state, | |
4d30ee82 | 1997 | window->counter); |
b3b06a32 ES |
1998 | |
1999 | next_column = rs_get_next_column(mvm, lq_sta, sta, tbl); | |
2000 | if (next_column != RS_COLUMN_INVALID) { | |
2001 | int ret = rs_switch_to_column(mvm, lq_sta, sta, | |
2002 | next_column); | |
2003 | if (!ret) | |
2004 | lq_sta->search_better_tbl = 1; | |
2005 | } else { | |
2006 | IWL_DEBUG_RATE(mvm, | |
2007 | "No more columns to explore in search cycle. Go to RS_STATE_SEARCH_CYCLE_ENDED\n"); | |
2008 | lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_ENDED; | |
2009 | } | |
8ca151b5 JB |
2010 | |
2011 | /* If new "search" mode was selected, set up in uCode table */ | |
2012 | if (lq_sta->search_better_tbl) { | |
2013 | /* Access the "search" table, clear its history. */ | |
2014 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
2015 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
2016 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
2017 | ||
2018 | /* Use new "search" start rate */ | |
8fc7c58c | 2019 | index = tbl->rate.index; |
8ca151b5 | 2020 | |
b3b06a32 ES |
2021 | rs_dump_rate(mvm, &tbl->rate, |
2022 | "Switch to SEARCH TABLE:"); | |
8fc7c58c | 2023 | rs_fill_lq_cmd(mvm, sta, lq_sta, &tbl->rate); |
9e680946 | 2024 | iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false); |
8ca151b5 JB |
2025 | } else { |
2026 | done_search = 1; | |
2027 | } | |
2028 | } | |
2029 | ||
b3b06a32 | 2030 | if (done_search && lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_ENDED) { |
8ca151b5 JB |
2031 | /* If the "active" (non-search) mode was legacy, |
2032 | * and we've tried switching antennas, | |
2033 | * but we haven't been able to try HT modes (not available), | |
2034 | * stay with best antenna legacy modulation for a while | |
2035 | * before next round of mode comparisons. */ | |
2036 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
b3b06a32 | 2037 | if (is_legacy(&tbl1->rate) && !sta->ht_cap.ht_supported) { |
8ca151b5 JB |
2038 | IWL_DEBUG_RATE(mvm, "LQ: STAY in legacy table\n"); |
2039 | rs_set_stay_in_table(mvm, 1, lq_sta); | |
b3b06a32 | 2040 | } else { |
8ca151b5 JB |
2041 | /* If we're in an HT mode, and all 3 mode switch actions |
2042 | * have been tried and compared, stay in this best modulation | |
2043 | * mode for a while before next round of mode comparisons. */ | |
8ca151b5 JB |
2044 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
2045 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2046 | (tid != IWL_MAX_TID_COUNT)) { | |
2047 | tid_data = &sta_priv->tid_data[tid]; | |
2048 | if (tid_data->state == IWL_AGG_OFF) { | |
2049 | IWL_DEBUG_RATE(mvm, | |
2050 | "try to aggregate tid %d\n", | |
2051 | tid); | |
2052 | rs_tl_turn_on_agg(mvm, tid, | |
2053 | lq_sta, sta); | |
2054 | } | |
2055 | } | |
2056 | rs_set_stay_in_table(mvm, 0, lq_sta); | |
2057 | } | |
2058 | } | |
2059 | ||
2060 | out: | |
8ca151b5 JB |
2061 | lq_sta->last_txrate_idx = index; |
2062 | } | |
2063 | ||
2064 | /** | |
2065 | * rs_initialize_lq - Initialize a station's hardware rate table | |
2066 | * | |
2067 | * The uCode's station table contains a table of fallback rates | |
2068 | * for automatic fallback during transmission. | |
2069 | * | |
2070 | * NOTE: This sets up a default set of values. These will be replaced later | |
2071 | * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of | |
2072 | * rc80211_simple. | |
2073 | * | |
2074 | * NOTE: Run REPLY_ADD_STA command to set up station table entry, before | |
2075 | * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD, | |
2076 | * which requires station table entry to exist). | |
2077 | */ | |
2078 | static void rs_initialize_lq(struct iwl_mvm *mvm, | |
2079 | struct ieee80211_sta *sta, | |
2080 | struct iwl_lq_sta *lq_sta, | |
b87c2179 ES |
2081 | enum ieee80211_band band, |
2082 | bool init) | |
8ca151b5 JB |
2083 | { |
2084 | struct iwl_scale_tbl_info *tbl; | |
5aa33553 | 2085 | struct rs_rate *rate; |
8ca151b5 | 2086 | int i; |
8ca151b5 JB |
2087 | u8 active_tbl = 0; |
2088 | u8 valid_tx_ant; | |
2089 | ||
2090 | if (!sta || !lq_sta) | |
2091 | return; | |
2092 | ||
2093 | i = lq_sta->last_txrate_idx; | |
2094 | ||
ff402312 | 2095 | valid_tx_ant = iwl_fw_valid_tx_ant(mvm->fw); |
8ca151b5 JB |
2096 | |
2097 | if (!lq_sta->search_better_tbl) | |
2098 | active_tbl = lq_sta->active_tbl; | |
2099 | else | |
2100 | active_tbl = 1 - lq_sta->active_tbl; | |
2101 | ||
2102 | tbl = &(lq_sta->lq_info[active_tbl]); | |
5aa33553 | 2103 | rate = &tbl->rate; |
8ca151b5 JB |
2104 | |
2105 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2106 | i = 0; | |
2107 | ||
b3b06a32 | 2108 | rate->index = i; |
5aa33553 | 2109 | rate->ant = first_antenna(valid_tx_ant); |
b3b06a32 ES |
2110 | rate->sgi = false; |
2111 | rate->bw = RATE_MCS_CHAN_WIDTH_20; | |
2112 | if (band == IEEE80211_BAND_5GHZ) | |
2113 | rate->type = LQ_LEGACY_A; | |
2114 | else | |
2115 | rate->type = LQ_LEGACY_G; | |
8ca151b5 | 2116 | |
b3b06a32 ES |
2117 | WARN_ON_ONCE(rate->ant != ANT_A && rate->ant != ANT_B); |
2118 | if (rate->ant == ANT_A) | |
2119 | tbl->column = RS_COLUMN_LEGACY_ANT_A; | |
2120 | else | |
2121 | tbl->column = RS_COLUMN_LEGACY_ANT_B; | |
2122 | ||
8ca151b5 | 2123 | rs_set_expected_tpt_table(lq_sta, tbl); |
8fc7c58c | 2124 | rs_fill_lq_cmd(NULL, NULL, lq_sta, rate); |
8ca151b5 | 2125 | /* TODO restore station should remember the lq cmd */ |
b87c2179 | 2126 | iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, init); |
8ca151b5 JB |
2127 | } |
2128 | ||
2129 | static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta, | |
2130 | struct ieee80211_tx_rate_control *txrc) | |
2131 | { | |
2132 | struct sk_buff *skb = txrc->skb; | |
2133 | struct ieee80211_supported_band *sband = txrc->sband; | |
2134 | struct iwl_op_mode *op_mode __maybe_unused = | |
2135 | (struct iwl_op_mode *)mvm_r; | |
2136 | struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode); | |
2137 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2138 | struct iwl_lq_sta *lq_sta = mvm_sta; | |
8ca151b5 | 2139 | |
8ca151b5 JB |
2140 | /* Get max rate if user set max rate */ |
2141 | if (lq_sta) { | |
2142 | lq_sta->max_rate_idx = txrc->max_rate_idx; | |
2143 | if ((sband->band == IEEE80211_BAND_5GHZ) && | |
2144 | (lq_sta->max_rate_idx != -1)) | |
2145 | lq_sta->max_rate_idx += IWL_FIRST_OFDM_RATE; | |
2146 | if ((lq_sta->max_rate_idx < 0) || | |
2147 | (lq_sta->max_rate_idx >= IWL_RATE_COUNT)) | |
2148 | lq_sta->max_rate_idx = -1; | |
2149 | } | |
2150 | ||
2151 | /* Treat uninitialized rate scaling data same as non-existing. */ | |
2152 | if (lq_sta && !lq_sta->drv) { | |
2153 | IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n"); | |
2154 | mvm_sta = NULL; | |
2155 | } | |
2156 | ||
2157 | /* Send management frames and NO_ACK data using lowest rate. */ | |
2158 | if (rate_control_send_low(sta, mvm_sta, txrc)) | |
2159 | return; | |
2160 | ||
d310e405 ES |
2161 | iwl_mvm_hwrate_to_tx_rate(lq_sta->last_rate_n_flags, |
2162 | info->band, &info->control.rates[0]); | |
2163 | ||
622ebe99 | 2164 | info->control.rates[0].count = 1; |
8ca151b5 JB |
2165 | } |
2166 | ||
2167 | static void *rs_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta, | |
2168 | gfp_t gfp) | |
2169 | { | |
2170 | struct iwl_mvm_sta *sta_priv = (struct iwl_mvm_sta *)sta->drv_priv; | |
2171 | struct iwl_op_mode *op_mode __maybe_unused = | |
2172 | (struct iwl_op_mode *)mvm_rate; | |
2173 | struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode); | |
2174 | ||
2175 | IWL_DEBUG_RATE(mvm, "create station rate scale window\n"); | |
2176 | ||
2177 | return &sta_priv->lq_sta; | |
2178 | } | |
2179 | ||
d310e405 ES |
2180 | static int rs_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap *vht_cap, |
2181 | int nss) | |
2182 | { | |
2183 | u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) & | |
2184 | (0x3 << (2 * (nss - 1))); | |
2185 | rx_mcs >>= (2 * (nss - 1)); | |
2186 | ||
2187 | if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_7) | |
2188 | return IWL_RATE_MCS_7_INDEX; | |
2189 | else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_8) | |
2190 | return IWL_RATE_MCS_8_INDEX; | |
2191 | else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_9) | |
2192 | return IWL_RATE_MCS_9_INDEX; | |
2193 | ||
2194 | WARN_ON_ONCE(rx_mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED); | |
2195 | return -1; | |
2196 | } | |
2197 | ||
750a1b45 ES |
2198 | static void rs_vht_set_enabled_rates(struct ieee80211_sta *sta, |
2199 | struct ieee80211_sta_vht_cap *vht_cap, | |
2200 | struct iwl_lq_sta *lq_sta) | |
2201 | { | |
2202 | int i; | |
2203 | int highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 1); | |
2204 | ||
2205 | if (highest_mcs >= IWL_RATE_MCS_0_INDEX) { | |
2206 | for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) { | |
2207 | if (i == IWL_RATE_9M_INDEX) | |
2208 | continue; | |
2209 | ||
4623a265 ES |
2210 | /* Disable MCS9 as a workaround */ |
2211 | if (i == IWL_RATE_MCS_9_INDEX) | |
2212 | continue; | |
2213 | ||
271518ad ES |
2214 | /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */ |
2215 | if (i == IWL_RATE_MCS_9_INDEX && | |
2216 | sta->bandwidth == IEEE80211_STA_RX_BW_20) | |
2217 | continue; | |
2218 | ||
750a1b45 ES |
2219 | lq_sta->active_siso_rate |= BIT(i); |
2220 | } | |
2221 | } | |
2222 | ||
ecc90e79 ES |
2223 | if (sta->rx_nss < 2) |
2224 | return; | |
2225 | ||
750a1b45 ES |
2226 | highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 2); |
2227 | if (highest_mcs >= IWL_RATE_MCS_0_INDEX) { | |
2228 | for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) { | |
2229 | if (i == IWL_RATE_9M_INDEX) | |
2230 | continue; | |
2231 | ||
4623a265 ES |
2232 | /* Disable MCS9 as a workaround */ |
2233 | if (i == IWL_RATE_MCS_9_INDEX) | |
2234 | continue; | |
2235 | ||
271518ad ES |
2236 | /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */ |
2237 | if (i == IWL_RATE_MCS_9_INDEX && | |
2238 | sta->bandwidth == IEEE80211_STA_RX_BW_20) | |
2239 | continue; | |
2240 | ||
750a1b45 ES |
2241 | lq_sta->active_mimo2_rate |= BIT(i); |
2242 | } | |
2243 | } | |
2244 | } | |
2245 | ||
8ca151b5 JB |
2246 | /* |
2247 | * Called after adding a new station to initialize rate scaling | |
2248 | */ | |
2249 | void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
b87c2179 | 2250 | enum ieee80211_band band, bool init) |
8ca151b5 JB |
2251 | { |
2252 | int i, j; | |
2253 | struct ieee80211_hw *hw = mvm->hw; | |
2254 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; | |
d310e405 | 2255 | struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; |
8ca151b5 JB |
2256 | struct iwl_mvm_sta *sta_priv; |
2257 | struct iwl_lq_sta *lq_sta; | |
2258 | struct ieee80211_supported_band *sband; | |
2259 | unsigned long supp; /* must be unsigned long for for_each_set_bit */ | |
2260 | ||
2261 | sta_priv = (struct iwl_mvm_sta *)sta->drv_priv; | |
2262 | lq_sta = &sta_priv->lq_sta; | |
b87c2179 ES |
2263 | memset(lq_sta, 0, sizeof(*lq_sta)); |
2264 | ||
8ca151b5 JB |
2265 | sband = hw->wiphy->bands[band]; |
2266 | ||
2267 | lq_sta->lq.sta_id = sta_priv->sta_id; | |
2268 | ||
2269 | for (j = 0; j < LQ_SIZE; j++) | |
2270 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
2271 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); | |
2272 | ||
2273 | lq_sta->flush_timer = 0; | |
8ca151b5 JB |
2274 | |
2275 | IWL_DEBUG_RATE(mvm, | |
2276 | "LQ: *** rate scale station global init for station %d ***\n", | |
2277 | sta_priv->sta_id); | |
2278 | /* TODO: what is a good starting rate for STA? About middle? Maybe not | |
2279 | * the lowest or the highest rate.. Could consider using RSSI from | |
2280 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2281 | * after assoc.. */ | |
2282 | ||
2283 | lq_sta->max_rate_idx = -1; | |
2284 | lq_sta->missed_rate_counter = IWL_MISSED_RATE_MAX; | |
8ca151b5 JB |
2285 | lq_sta->band = sband->band; |
2286 | /* | |
2287 | * active legacy rates as per supported rates bitmap | |
2288 | */ | |
2289 | supp = sta->supp_rates[sband->band]; | |
2290 | lq_sta->active_legacy_rate = 0; | |
2291 | for_each_set_bit(i, &supp, BITS_PER_LONG) | |
2292 | lq_sta->active_legacy_rate |= BIT(sband->bitrates[i].hw_value); | |
2293 | ||
d310e405 ES |
2294 | /* TODO: should probably account for rx_highest for both HT/VHT */ |
2295 | if (!vht_cap || !vht_cap->vht_supported) { | |
2296 | /* active_siso_rate mask includes 9 MBits (bit 5), | |
2297 | * and CCK (bits 0-3), supp_rates[] does not; | |
2298 | * shift to convert format, force 9 MBits off. | |
2299 | */ | |
2300 | lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1; | |
2301 | lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1; | |
2302 | lq_sta->active_siso_rate &= ~((u16)0x2); | |
2303 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; | |
2304 | ||
2305 | /* Same here */ | |
2306 | lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1; | |
2307 | lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1; | |
2308 | lq_sta->active_mimo2_rate &= ~((u16)0x2); | |
2309 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2310 | ||
2311 | lq_sta->is_vht = false; | |
2312 | } else { | |
750a1b45 | 2313 | rs_vht_set_enabled_rates(sta, vht_cap, lq_sta); |
d310e405 ES |
2314 | lq_sta->is_vht = true; |
2315 | } | |
8ca151b5 | 2316 | |
8ca151b5 | 2317 | IWL_DEBUG_RATE(mvm, |
d310e405 | 2318 | "SISO-RATE=%X MIMO2-RATE=%X VHT=%d\n", |
8ca151b5 | 2319 | lq_sta->active_siso_rate, |
d310e405 ES |
2320 | lq_sta->active_mimo2_rate, |
2321 | lq_sta->is_vht); | |
8ca151b5 JB |
2322 | |
2323 | /* These values will be overridden later */ | |
2324 | lq_sta->lq.single_stream_ant_msk = | |
ff402312 | 2325 | first_antenna(iwl_fw_valid_tx_ant(mvm->fw)); |
809bccfa | 2326 | lq_sta->lq.dual_stream_ant_msk = ANT_AB; |
8ca151b5 JB |
2327 | |
2328 | /* as default allow aggregation for all tids */ | |
2329 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
2330 | lq_sta->drv = mvm; | |
2331 | ||
2332 | /* Set last_txrate_idx to lowest rate */ | |
2333 | lq_sta->last_txrate_idx = rate_lowest_index(sband, sta); | |
2334 | if (sband->band == IEEE80211_BAND_5GHZ) | |
2335 | lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; | |
2336 | lq_sta->is_agg = 0; | |
2337 | #ifdef CONFIG_MAC80211_DEBUGFS | |
2338 | lq_sta->dbg_fixed_rate = 0; | |
2339 | #endif | |
2340 | ||
b87c2179 ES |
2341 | rs_initialize_lq(mvm, sta, lq_sta, band, init); |
2342 | } | |
2343 | ||
2344 | static void rs_rate_update(void *mvm_r, | |
2345 | struct ieee80211_supported_band *sband, | |
2346 | struct cfg80211_chan_def *chandef, | |
2347 | struct ieee80211_sta *sta, void *priv_sta, | |
2348 | u32 changed) | |
2349 | { | |
2350 | u8 tid; | |
2351 | struct iwl_op_mode *op_mode = | |
2352 | (struct iwl_op_mode *)mvm_r; | |
2353 | struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); | |
2354 | ||
2355 | /* Stop any ongoing aggregations as rs starts off assuming no agg */ | |
2356 | for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) | |
2357 | ieee80211_stop_tx_ba_session(sta, tid); | |
2358 | ||
2359 | iwl_mvm_rs_rate_init(mvm, sta, sband->band, false); | |
8ca151b5 JB |
2360 | } |
2361 | ||
8fc7c58c ES |
2362 | #ifdef CONFIG_MAC80211_DEBUGFS |
2363 | static void rs_build_rates_table_from_fixed(struct iwl_mvm *mvm, | |
2364 | struct iwl_lq_cmd *lq_cmd, | |
2365 | enum ieee80211_band band, | |
2366 | u32 ucode_rate) | |
2367 | { | |
2368 | struct rs_rate rate; | |
2369 | int i; | |
2370 | int num_rates = ARRAY_SIZE(lq_cmd->rs_table); | |
2371 | __le32 ucode_rate_le32 = cpu_to_le32(ucode_rate); | |
2372 | ||
2373 | for (i = 0; i < num_rates; i++) | |
2374 | lq_cmd->rs_table[i] = ucode_rate_le32; | |
2375 | ||
2376 | rs_rate_from_ucode_rate(ucode_rate, band, &rate); | |
2377 | ||
2378 | if (is_mimo(&rate)) | |
2379 | lq_cmd->mimo_delim = num_rates - 1; | |
2380 | else | |
2381 | lq_cmd->mimo_delim = 0; | |
2382 | } | |
2383 | #endif /* CONFIG_MAC80211_DEBUGFS */ | |
2384 | ||
e07be6d3 ES |
2385 | static void rs_fill_rates_for_column(struct iwl_mvm *mvm, |
2386 | struct iwl_lq_sta *lq_sta, | |
2387 | struct rs_rate *rate, | |
2388 | __le32 *rs_table, int *rs_table_index, | |
2389 | int num_rates, int num_retries, | |
2390 | u8 valid_tx_ant, bool toggle_ant) | |
2391 | { | |
2392 | int i, j; | |
2393 | __le32 ucode_rate; | |
2394 | bool bottom_reached = false; | |
2395 | int prev_rate_idx = rate->index; | |
2396 | int end = LINK_QUAL_MAX_RETRY_NUM; | |
2397 | int index = *rs_table_index; | |
2398 | ||
2399 | for (i = 0; i < num_rates && index < end; i++) { | |
2400 | ucode_rate = cpu_to_le32(ucode_rate_from_rs_rate(mvm, rate)); | |
2401 | for (j = 0; j < num_retries && index < end; j++, index++) | |
2402 | rs_table[index] = ucode_rate; | |
2403 | ||
2404 | if (toggle_ant) | |
2405 | rs_toggle_antenna(valid_tx_ant, rate); | |
2406 | ||
2407 | prev_rate_idx = rate->index; | |
2408 | bottom_reached = rs_get_lower_rate_in_column(lq_sta, rate); | |
2409 | if (bottom_reached && !is_legacy(rate)) | |
2410 | break; | |
2411 | } | |
2412 | ||
2413 | if (!bottom_reached) | |
2414 | rate->index = prev_rate_idx; | |
2415 | ||
2416 | *rs_table_index = index; | |
2417 | } | |
2418 | ||
2419 | /* Building the rate table is non trivial. When we're in MIMO2/VHT/80Mhz/SGI | |
2420 | * column the rate table should look like this: | |
2421 | * | |
2422 | * rate[0] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI | |
2423 | * rate[1] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI | |
2424 | * rate[2] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI | |
2425 | * rate[3] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI | |
2426 | * rate[4] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI | |
2427 | * rate[5] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI | |
2428 | * rate[6] 0x4005007 VHT | ANT: A BW: 80Mhz MCS: 7 NSS: 1 NGI | |
2429 | * rate[7] 0x4009006 VHT | ANT: B BW: 80Mhz MCS: 6 NSS: 1 NGI | |
2430 | * rate[8] 0x4005005 VHT | ANT: A BW: 80Mhz MCS: 5 NSS: 1 NGI | |
2431 | * rate[9] 0x800B Legacy | ANT: B Rate: 36 Mbps | |
2432 | * rate[10] 0x4009 Legacy | ANT: A Rate: 24 Mbps | |
2433 | * rate[11] 0x8007 Legacy | ANT: B Rate: 18 Mbps | |
2434 | * rate[12] 0x4005 Legacy | ANT: A Rate: 12 Mbps | |
2435 | * rate[13] 0x800F Legacy | ANT: B Rate: 9 Mbps | |
2436 | * rate[14] 0x400D Legacy | ANT: A Rate: 6 Mbps | |
2437 | * rate[15] 0x800D Legacy | ANT: B Rate: 6 Mbps | |
2438 | */ | |
8fc7c58c ES |
2439 | static void rs_build_rates_table(struct iwl_mvm *mvm, |
2440 | struct iwl_lq_sta *lq_sta, | |
2441 | const struct rs_rate *initial_rate) | |
8ca151b5 | 2442 | { |
5aa33553 | 2443 | struct rs_rate rate; |
e07be6d3 | 2444 | int num_rates, num_retries, index = 0; |
8ca151b5 JB |
2445 | u8 valid_tx_ant = 0; |
2446 | struct iwl_lq_cmd *lq_cmd = &lq_sta->lq; | |
e07be6d3 | 2447 | bool toggle_ant = false; |
8ca151b5 | 2448 | |
8fc7c58c ES |
2449 | memcpy(&rate, initial_rate, sizeof(struct rs_rate)); |
2450 | ||
e07be6d3 ES |
2451 | if (mvm) |
2452 | valid_tx_ant = iwl_fw_valid_tx_ant(mvm->fw); | |
8ca151b5 | 2453 | |
e07be6d3 ES |
2454 | if (is_siso(&rate)) { |
2455 | num_rates = RS_INITIAL_SISO_NUM_RATES; | |
2456 | num_retries = RS_HT_VHT_RETRIES_PER_RATE; | |
2457 | } else if (is_mimo(&rate)) { | |
2458 | num_rates = RS_INITIAL_MIMO_NUM_RATES; | |
2459 | num_retries = RS_HT_VHT_RETRIES_PER_RATE; | |
8ca151b5 | 2460 | } else { |
e07be6d3 ES |
2461 | num_rates = RS_INITIAL_LEGACY_NUM_RATES; |
2462 | num_retries = RS_LEGACY_RETRIES_PER_RATE; | |
2463 | toggle_ant = true; | |
8ca151b5 JB |
2464 | } |
2465 | ||
e07be6d3 ES |
2466 | rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, |
2467 | num_rates, num_retries, valid_tx_ant, | |
2468 | toggle_ant); | |
8ca151b5 | 2469 | |
e07be6d3 | 2470 | rs_get_lower_rate_down_column(lq_sta, &rate); |
8ca151b5 | 2471 | |
e07be6d3 ES |
2472 | if (is_siso(&rate)) { |
2473 | num_rates = RS_SECONDARY_SISO_NUM_RATES; | |
2474 | num_retries = RS_SECONDARY_SISO_RETRIES; | |
2475 | } else if (is_legacy(&rate)) { | |
2476 | num_rates = RS_SECONDARY_LEGACY_NUM_RATES; | |
2477 | num_retries = RS_LEGACY_RETRIES_PER_RATE; | |
2478 | } else { | |
2479 | WARN_ON_ONCE(1); | |
2480 | } | |
8ca151b5 | 2481 | |
e07be6d3 | 2482 | toggle_ant = true; |
8ca151b5 | 2483 | |
e07be6d3 ES |
2484 | rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, |
2485 | num_rates, num_retries, valid_tx_ant, | |
2486 | toggle_ant); | |
8ca151b5 | 2487 | |
e07be6d3 | 2488 | rs_get_lower_rate_down_column(lq_sta, &rate); |
8ca151b5 | 2489 | |
e07be6d3 ES |
2490 | num_rates = RS_SECONDARY_LEGACY_NUM_RATES; |
2491 | num_retries = RS_LEGACY_RETRIES_PER_RATE; | |
8ca151b5 | 2492 | |
e07be6d3 ES |
2493 | rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, |
2494 | num_rates, num_retries, valid_tx_ant, | |
2495 | toggle_ant); | |
8ca151b5 | 2496 | |
8fc7c58c ES |
2497 | } |
2498 | ||
2499 | static void rs_fill_lq_cmd(struct iwl_mvm *mvm, | |
2500 | struct ieee80211_sta *sta, | |
2501 | struct iwl_lq_sta *lq_sta, | |
2502 | const struct rs_rate *initial_rate) | |
2503 | { | |
2504 | struct iwl_lq_cmd *lq_cmd = &lq_sta->lq; | |
2505 | u8 ant = initial_rate->ant; | |
2506 | ||
2507 | #ifdef CONFIG_MAC80211_DEBUGFS | |
2508 | if (lq_sta->dbg_fixed_rate) { | |
2509 | rs_build_rates_table_from_fixed(mvm, lq_cmd, | |
2510 | lq_sta->band, | |
2511 | lq_sta->dbg_fixed_rate); | |
2512 | ant = (lq_sta->dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) >> | |
2513 | RATE_MCS_ANT_POS; | |
2514 | } else | |
2515 | #endif | |
2516 | rs_build_rates_table(mvm, lq_sta, initial_rate); | |
2517 | ||
2518 | if (num_of_ant(ant) == 1) | |
2519 | lq_cmd->single_stream_ant_msk = ant; | |
8ca151b5 JB |
2520 | |
2521 | lq_cmd->agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF; | |
2522 | lq_cmd->agg_disable_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; | |
2523 | ||
2524 | lq_cmd->agg_time_limit = | |
2525 | cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); | |
e96d551f | 2526 | |
9145d151 EG |
2527 | if (sta) |
2528 | lq_cmd->agg_time_limit = | |
2529 | cpu_to_le16(iwl_mvm_bt_coex_agg_time_limit(mvm, sta)); | |
8ca151b5 JB |
2530 | } |
2531 | ||
2532 | static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) | |
2533 | { | |
2534 | return hw->priv; | |
2535 | } | |
2536 | /* rate scale requires free function to be implemented */ | |
2537 | static void rs_free(void *mvm_rate) | |
2538 | { | |
2539 | return; | |
2540 | } | |
2541 | ||
2542 | static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta, | |
2543 | void *mvm_sta) | |
2544 | { | |
2545 | struct iwl_op_mode *op_mode __maybe_unused = mvm_r; | |
2546 | struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode); | |
2547 | ||
2548 | IWL_DEBUG_RATE(mvm, "enter\n"); | |
2549 | IWL_DEBUG_RATE(mvm, "leave\n"); | |
2550 | } | |
2551 | ||
2552 | #ifdef CONFIG_MAC80211_DEBUGFS | |
5aa33553 ES |
2553 | static int rs_pretty_print_rate(char *buf, const u32 rate) |
2554 | { | |
2555 | ||
1a61b347 ES |
2556 | char *type, *bw; |
2557 | u8 mcs = 0, nss = 0; | |
2558 | u8 ant = (rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS; | |
2559 | ||
2560 | if (!(rate & RATE_MCS_HT_MSK) && | |
2561 | !(rate & RATE_MCS_VHT_MSK)) { | |
2562 | int index = iwl_hwrate_to_plcp_idx(rate); | |
2563 | ||
2564 | return sprintf(buf, "Legacy | ANT: %s Rate: %s Mbps\n", | |
5aa33553 | 2565 | rs_pretty_ant(ant), iwl_rate_mcs[index].mbps); |
1a61b347 ES |
2566 | } |
2567 | ||
2568 | if (rate & RATE_MCS_VHT_MSK) { | |
2569 | type = "VHT"; | |
2570 | mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK; | |
2571 | nss = ((rate & RATE_VHT_MCS_NSS_MSK) | |
2572 | >> RATE_VHT_MCS_NSS_POS) + 1; | |
2573 | } else if (rate & RATE_MCS_HT_MSK) { | |
2574 | type = "HT"; | |
2575 | mcs = rate & RATE_HT_MCS_INDEX_MSK; | |
2576 | } else { | |
2577 | type = "Unknown"; /* shouldn't happen */ | |
2578 | } | |
2579 | ||
2580 | switch (rate & RATE_MCS_CHAN_WIDTH_MSK) { | |
2581 | case RATE_MCS_CHAN_WIDTH_20: | |
2582 | bw = "20Mhz"; | |
2583 | break; | |
2584 | case RATE_MCS_CHAN_WIDTH_40: | |
2585 | bw = "40Mhz"; | |
2586 | break; | |
2587 | case RATE_MCS_CHAN_WIDTH_80: | |
2588 | bw = "80Mhz"; | |
2589 | break; | |
2590 | case RATE_MCS_CHAN_WIDTH_160: | |
2591 | bw = "160Mhz"; | |
2592 | break; | |
2593 | default: | |
2594 | bw = "BAD BW"; | |
2595 | } | |
2596 | ||
2597 | return sprintf(buf, "%s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s%s\n", | |
5aa33553 | 2598 | type, rs_pretty_ant(ant), bw, mcs, nss, |
1a61b347 ES |
2599 | (rate & RATE_MCS_SGI_MSK) ? "SGI " : "NGI ", |
2600 | (rate & RATE_MCS_STBC_MSK) ? "STBC " : "", | |
2601 | (rate & RATE_MCS_LDPC_MSK) ? "LDPC " : "", | |
2602 | (rate & RATE_MCS_BF_MSK) ? "BF " : "", | |
2603 | (rate & RATE_MCS_ZLF_MSK) ? "ZLF " : ""); | |
2604 | } | |
2605 | ||
a0c38b21 ES |
2606 | /** |
2607 | * Program the device to use fixed rate for frame transmit | |
2608 | * This is for debugging/testing only | |
2609 | * once the device start use fixed rate, we need to reload the module | |
2610 | * to being back the normal operation. | |
2611 | */ | |
2612 | static void rs_program_fix_rate(struct iwl_mvm *mvm, | |
2613 | struct iwl_lq_sta *lq_sta) | |
2614 | { | |
2615 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ | |
2616 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2617 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2618 | ||
2619 | IWL_DEBUG_RATE(mvm, "sta_id %d rate 0x%X\n", | |
2620 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); | |
2621 | ||
2622 | if (lq_sta->dbg_fixed_rate) { | |
8fc7c58c ES |
2623 | struct rs_rate rate; |
2624 | rs_rate_from_ucode_rate(lq_sta->dbg_fixed_rate, | |
2625 | lq_sta->band, &rate); | |
2626 | rs_fill_lq_cmd(NULL, NULL, lq_sta, &rate); | |
a0c38b21 ES |
2627 | iwl_mvm_send_lq_cmd(lq_sta->drv, &lq_sta->lq, false); |
2628 | } | |
2629 | } | |
2630 | ||
9d10849e EG |
2631 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2632 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2633 | { | |
2634 | struct iwl_lq_sta *lq_sta = file->private_data; | |
2635 | struct iwl_mvm *mvm; | |
2636 | char buf[64]; | |
2637 | size_t buf_size; | |
2638 | u32 parsed_rate; | |
2639 | ||
2640 | ||
2641 | mvm = lq_sta->drv; | |
2642 | memset(buf, 0, sizeof(buf)); | |
2643 | buf_size = min(count, sizeof(buf) - 1); | |
2644 | if (copy_from_user(buf, user_buf, buf_size)) | |
2645 | return -EFAULT; | |
2646 | ||
2647 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
2648 | lq_sta->dbg_fixed_rate = parsed_rate; | |
2649 | else | |
2650 | lq_sta->dbg_fixed_rate = 0; | |
2651 | ||
2652 | rs_program_fix_rate(mvm, lq_sta); | |
2653 | ||
2654 | return count; | |
2655 | } | |
2656 | ||
8ca151b5 JB |
2657 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2658 | char __user *user_buf, size_t count, loff_t *ppos) | |
2659 | { | |
2660 | char *buff; | |
2661 | int desc = 0; | |
2662 | int i = 0; | |
8ca151b5 JB |
2663 | ssize_t ret; |
2664 | ||
2665 | struct iwl_lq_sta *lq_sta = file->private_data; | |
2666 | struct iwl_mvm *mvm; | |
2667 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
5aa33553 | 2668 | struct rs_rate *rate = &tbl->rate; |
8ca151b5 | 2669 | mvm = lq_sta->drv; |
1a61b347 | 2670 | buff = kmalloc(2048, GFP_KERNEL); |
8ca151b5 JB |
2671 | if (!buff) |
2672 | return -ENOMEM; | |
2673 | ||
2674 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); | |
2675 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", | |
2676 | lq_sta->total_failed, lq_sta->total_success, | |
2677 | lq_sta->active_legacy_rate); | |
2678 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", | |
2679 | lq_sta->dbg_fixed_rate); | |
2680 | desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n", | |
ff402312 EG |
2681 | (iwl_fw_valid_tx_ant(mvm->fw) & ANT_A) ? "ANT_A," : "", |
2682 | (iwl_fw_valid_tx_ant(mvm->fw) & ANT_B) ? "ANT_B," : "", | |
2683 | (iwl_fw_valid_tx_ant(mvm->fw) & ANT_C) ? "ANT_C" : ""); | |
8ca151b5 | 2684 | desc += sprintf(buff+desc, "lq type %s\n", |
5aa33553 ES |
2685 | (is_legacy(rate)) ? "legacy" : |
2686 | is_vht(rate) ? "VHT" : "HT"); | |
2687 | if (!is_legacy(rate)) { | |
8ca151b5 | 2688 | desc += sprintf(buff+desc, " %s", |
5aa33553 | 2689 | (is_siso(rate)) ? "SISO" : "MIMO2"); |
8ca151b5 | 2690 | desc += sprintf(buff+desc, " %s", |
5aa33553 ES |
2691 | (is_ht20(rate)) ? "20MHz" : |
2692 | (is_ht40(rate)) ? "40MHz" : | |
2693 | (is_ht80(rate)) ? "80Mhz" : "BAD BW"); | |
6a524f48 | 2694 | desc += sprintf(buff+desc, " %s %s\n", |
5aa33553 | 2695 | (rate->sgi) ? "SGI" : "NGI", |
6a524f48 | 2696 | (lq_sta->is_agg) ? "AGG on" : ""); |
8ca151b5 JB |
2697 | } |
2698 | desc += sprintf(buff+desc, "last tx rate=0x%X\n", | |
2699 | lq_sta->last_rate_n_flags); | |
2700 | desc += sprintf(buff+desc, | |
1a61b347 | 2701 | "general: flags=0x%X mimo-d=%d s-ant=0x%x d-ant=0x%x\n", |
8ca151b5 JB |
2702 | lq_sta->lq.flags, |
2703 | lq_sta->lq.mimo_delim, | |
2704 | lq_sta->lq.single_stream_ant_msk, | |
2705 | lq_sta->lq.dual_stream_ant_msk); | |
2706 | ||
2707 | desc += sprintf(buff+desc, | |
2708 | "agg: time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
2709 | le16_to_cpu(lq_sta->lq.agg_time_limit), | |
2710 | lq_sta->lq.agg_disable_start_th, | |
2711 | lq_sta->lq.agg_frame_cnt_limit); | |
2712 | ||
2713 | desc += sprintf(buff+desc, | |
2714 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
2715 | lq_sta->lq.initial_rate_index[0], | |
2716 | lq_sta->lq.initial_rate_index[1], | |
2717 | lq_sta->lq.initial_rate_index[2], | |
2718 | lq_sta->lq.initial_rate_index[3]); | |
2719 | ||
2720 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { | |
1a61b347 ES |
2721 | u32 rate = le32_to_cpu(lq_sta->lq.rs_table[i]); |
2722 | desc += sprintf(buff+desc, | |
2723 | " rate[%d] 0x%X ", | |
2724 | i, rate); | |
2725 | ||
2726 | desc += rs_pretty_print_rate(buff+desc, rate); | |
8ca151b5 JB |
2727 | } |
2728 | ||
2729 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2730 | kfree(buff); | |
2731 | return ret; | |
2732 | } | |
2733 | ||
2734 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
2735 | .write = rs_sta_dbgfs_scale_table_write, | |
2736 | .read = rs_sta_dbgfs_scale_table_read, | |
2737 | .open = simple_open, | |
2738 | .llseek = default_llseek, | |
2739 | }; | |
2740 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, | |
2741 | char __user *user_buf, size_t count, loff_t *ppos) | |
2742 | { | |
2743 | char *buff; | |
2744 | int desc = 0; | |
2745 | int i, j; | |
2746 | ssize_t ret; | |
d310e405 | 2747 | struct iwl_scale_tbl_info *tbl; |
5aa33553 | 2748 | struct rs_rate *rate; |
8ca151b5 JB |
2749 | struct iwl_lq_sta *lq_sta = file->private_data; |
2750 | ||
2751 | buff = kmalloc(1024, GFP_KERNEL); | |
2752 | if (!buff) | |
2753 | return -ENOMEM; | |
2754 | ||
2755 | for (i = 0; i < LQ_SIZE; i++) { | |
d310e405 | 2756 | tbl = &(lq_sta->lq_info[i]); |
5aa33553 | 2757 | rate = &tbl->rate; |
8ca151b5 | 2758 | desc += sprintf(buff+desc, |
6a524f48 | 2759 | "%s type=%d SGI=%d BW=%s DUP=0\n" |
8fc7c58c | 2760 | "index=%d\n", |
8ca151b5 | 2761 | lq_sta->active_tbl == i ? "*" : "x", |
5aa33553 ES |
2762 | rate->type, |
2763 | rate->sgi, | |
2764 | is_ht20(rate) ? "20Mhz" : | |
2765 | is_ht40(rate) ? "40Mhz" : | |
2766 | is_ht80(rate) ? "80Mhz" : "ERR", | |
8fc7c58c | 2767 | rate->index); |
8ca151b5 JB |
2768 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
2769 | desc += sprintf(buff+desc, | |
2770 | "counter=%d success=%d %%=%d\n", | |
d310e405 ES |
2771 | tbl->win[j].counter, |
2772 | tbl->win[j].success_counter, | |
2773 | tbl->win[j].success_ratio); | |
8ca151b5 JB |
2774 | } |
2775 | } | |
2776 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2777 | kfree(buff); | |
2778 | return ret; | |
2779 | } | |
2780 | ||
2781 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2782 | .read = rs_sta_dbgfs_stats_table_read, | |
2783 | .open = simple_open, | |
2784 | .llseek = default_llseek, | |
2785 | }; | |
2786 | ||
8ca151b5 JB |
2787 | static void rs_add_debugfs(void *mvm, void *mvm_sta, struct dentry *dir) |
2788 | { | |
2789 | struct iwl_lq_sta *lq_sta = mvm_sta; | |
2790 | lq_sta->rs_sta_dbgfs_scale_table_file = | |
2791 | debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir, | |
2792 | lq_sta, &rs_sta_dbgfs_scale_table_ops); | |
2793 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
2794 | debugfs_create_file("rate_stats_table", S_IRUSR, dir, | |
2795 | lq_sta, &rs_sta_dbgfs_stats_table_ops); | |
8ca151b5 JB |
2796 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
2797 | debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir, | |
2798 | &lq_sta->tx_agg_tid_en); | |
2799 | } | |
2800 | ||
2801 | static void rs_remove_debugfs(void *mvm, void *mvm_sta) | |
2802 | { | |
2803 | struct iwl_lq_sta *lq_sta = mvm_sta; | |
2804 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); | |
2805 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
8ca151b5 JB |
2806 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); |
2807 | } | |
2808 | #endif | |
2809 | ||
2810 | /* | |
2811 | * Initialization of rate scaling information is done by driver after | |
2812 | * the station is added. Since mac80211 calls this function before a | |
2813 | * station is added we ignore it. | |
2814 | */ | |
2815 | static void rs_rate_init_stub(void *mvm_r, | |
3de805cf SW |
2816 | struct ieee80211_supported_band *sband, |
2817 | struct cfg80211_chan_def *chandef, | |
2818 | struct ieee80211_sta *sta, void *mvm_sta) | |
8ca151b5 JB |
2819 | { |
2820 | } | |
2821 | static struct rate_control_ops rs_mvm_ops = { | |
2822 | .module = NULL, | |
2823 | .name = RS_NAME, | |
2824 | .tx_status = rs_tx_status, | |
2825 | .get_rate = rs_get_rate, | |
2826 | .rate_init = rs_rate_init_stub, | |
2827 | .alloc = rs_alloc, | |
2828 | .free = rs_free, | |
2829 | .alloc_sta = rs_alloc_sta, | |
2830 | .free_sta = rs_free_sta, | |
b87c2179 | 2831 | .rate_update = rs_rate_update, |
8ca151b5 JB |
2832 | #ifdef CONFIG_MAC80211_DEBUGFS |
2833 | .add_sta_debugfs = rs_add_debugfs, | |
2834 | .remove_sta_debugfs = rs_remove_debugfs, | |
2835 | #endif | |
2836 | }; | |
2837 | ||
2838 | int iwl_mvm_rate_control_register(void) | |
2839 | { | |
2840 | return ieee80211_rate_control_register(&rs_mvm_ops); | |
2841 | } | |
2842 | ||
2843 | void iwl_mvm_rate_control_unregister(void) | |
2844 | { | |
2845 | ieee80211_rate_control_unregister(&rs_mvm_ops); | |
2846 | } | |
9ee718aa EL |
2847 | |
2848 | /** | |
2849 | * iwl_mvm_tx_protection - Gets LQ command, change it to enable/disable | |
2850 | * Tx protection, according to this rquest and previous requests, | |
2851 | * and send the LQ command. | |
9ee718aa EL |
2852 | * @mvmsta: The station |
2853 | * @enable: Enable Tx protection? | |
2854 | */ | |
e126b5d9 JB |
2855 | int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, |
2856 | bool enable) | |
9ee718aa | 2857 | { |
e126b5d9 JB |
2858 | struct iwl_lq_cmd *lq = &mvmsta->lq_sta.lq; |
2859 | ||
9ee718aa EL |
2860 | lockdep_assert_held(&mvm->mutex); |
2861 | ||
2862 | if (enable) { | |
2863 | if (mvmsta->tx_protection == 0) | |
d307ec8d | 2864 | lq->flags |= LQ_FLAG_USE_RTS_MSK; |
9ee718aa EL |
2865 | mvmsta->tx_protection++; |
2866 | } else { | |
2867 | mvmsta->tx_protection--; | |
2868 | if (mvmsta->tx_protection == 0) | |
d307ec8d | 2869 | lq->flags &= ~LQ_FLAG_USE_RTS_MSK; |
9ee718aa EL |
2870 | } |
2871 | ||
9e680946 | 2872 | return iwl_mvm_send_lq_cmd(mvm, lq, false); |
9ee718aa | 2873 | } |