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b481de9c ZY |
1 | /****************************************************************************** |
2 | * | |
01f8162a | 3 | * Copyright(c) 2005 - 2009 Intel Corporation. All rights reserved. |
b481de9c ZY |
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: | |
759ef89f | 22 | * Intel Linux Wireless <ilw@linux.intel.com> |
b481de9c ZY |
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/wireless.h> | |
30 | #include <net/mac80211.h> | |
b481de9c ZY |
31 | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/etherdevice.h> | |
34 | #include <linux/delay.h> | |
35 | ||
36 | #include <linux/workqueue.h> | |
37 | ||
3e0d4cb1 | 38 | #include "iwl-dev.h" |
be1f3ab6 | 39 | #include "iwl-sta.h" |
857485c0 | 40 | #include "iwl-core.h" |
b481de9c | 41 | |
e227ceac | 42 | #define RS_NAME "iwl-agn-rs" |
b481de9c | 43 | |
aade00ce | 44 | #define NUM_TRY_BEFORE_ANT_TOGGLE 1 |
b481de9c ZY |
45 | #define IWL_NUMBER_TRY 1 |
46 | #define IWL_HT_NUMBER_TRY 3 | |
47 | ||
77626355 BC |
48 | #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
49 | #define IWL_RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */ | |
50 | #define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ | |
51 | ||
7d049e5a AM |
52 | /* max allowed rate miss before sync LQ cmd */ |
53 | #define IWL_MISSED_RATE_MAX 15 | |
77626355 BC |
54 | /* max time to accum history 2 seconds */ |
55 | #define IWL_RATE_SCALE_FLUSH_INTVL (2*HZ) | |
b481de9c ZY |
56 | |
57 | static u8 rs_ht_to_legacy[] = { | |
58 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
59 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
60 | IWL_RATE_6M_INDEX, | |
61 | IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX, | |
62 | IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX, | |
63 | IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX, | |
64 | IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX | |
65 | }; | |
66 | ||
aade00ce GC |
67 | static const u8 ant_toggle_lookup[] = { |
68 | /*ANT_NONE -> */ ANT_NONE, | |
69 | /*ANT_A -> */ ANT_B, | |
70 | /*ANT_B -> */ ANT_C, | |
71 | /*ANT_AB -> */ ANT_BC, | |
72 | /*ANT_C -> */ ANT_A, | |
73 | /*ANT_AC -> */ ANT_AB, | |
74 | /*ANT_BC -> */ ANT_AC, | |
75 | /*ANT_ABC -> */ ANT_ABC, | |
76 | }; | |
77 | ||
77626355 | 78 | /** |
e227ceac | 79 | * struct iwl_rate_scale_data -- tx success history for one rate |
77626355 | 80 | */ |
e227ceac | 81 | struct iwl_rate_scale_data { |
77626355 BC |
82 | u64 data; /* bitmap of successful frames */ |
83 | s32 success_counter; /* number of frames successful */ | |
84 | s32 success_ratio; /* per-cent * 128 */ | |
85 | s32 counter; /* number of frames attempted */ | |
86 | s32 average_tpt; /* success ratio * expected throughput */ | |
b481de9c ZY |
87 | unsigned long stamp; |
88 | }; | |
89 | ||
77626355 | 90 | /** |
e227ceac | 91 | * struct iwl_scale_tbl_info -- tx params and success history for all rates |
77626355 | 92 | * |
e227ceac | 93 | * There are two of these in struct iwl_lq_sta, |
77626355 BC |
94 | * one for "active", and one for "search". |
95 | */ | |
e227ceac | 96 | struct iwl_scale_tbl_info { |
fde0db31 GC |
97 | enum iwl_table_type lq_type; |
98 | u8 ant_type; | |
77626355 BC |
99 | u8 is_SGI; /* 1 = short guard interval */ |
100 | u8 is_fat; /* 1 = 40 MHz channel width */ | |
101 | u8 is_dup; /* 1 = duplicated data streams */ | |
102 | u8 action; /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */ | |
103 | s32 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */ | |
39e88504 | 104 | u32 current_rate; /* rate_n_flags, uCode API format */ |
e227ceac | 105 | struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */ |
b481de9c ZY |
106 | }; |
107 | ||
e227ceac | 108 | struct iwl_traffic_load { |
0c11b4de RR |
109 | unsigned long time_stamp; /* age of the oldest statistics */ |
110 | u32 packet_count[TID_QUEUE_MAX_SIZE]; /* packet count in this time | |
111 | * slice */ | |
112 | u32 total; /* total num of packets during the | |
113 | * last TID_MAX_TIME_DIFF */ | |
114 | u8 queue_count; /* number of queues that has | |
115 | * been used since the last cleanup */ | |
116 | u8 head; /* start of the circular buffer */ | |
117 | }; | |
118 | ||
77626355 | 119 | /** |
e227ceac | 120 | * struct iwl_lq_sta -- driver's rate scaling private structure |
77626355 BC |
121 | * |
122 | * Pointer to this gets passed back and forth between driver and mac80211. | |
123 | */ | |
e227ceac | 124 | struct iwl_lq_sta { |
77626355 BC |
125 | u8 active_tbl; /* index of active table, range 0-1 */ |
126 | u8 enable_counter; /* indicates HT mode */ | |
127 | u8 stay_in_tbl; /* 1: disallow, 0: allow search for new mode */ | |
128 | u8 search_better_tbl; /* 1: currently trying alternate mode */ | |
b481de9c | 129 | s32 last_tpt; |
77626355 BC |
130 | |
131 | /* The following determine when to search for a new mode */ | |
b481de9c | 132 | u32 table_count_limit; |
77626355 BC |
133 | u32 max_failure_limit; /* # failed frames before new search */ |
134 | u32 max_success_limit; /* # successful frames before new search */ | |
b481de9c | 135 | u32 table_count; |
77626355 BC |
136 | u32 total_failed; /* total failed frames, any/all rates */ |
137 | u32 total_success; /* total successful frames, any/all rates */ | |
138 | u32 flush_timer; /* time staying in mode before new search */ | |
139 | ||
140 | u8 action_counter; /* # mode-switch actions tried */ | |
b481de9c ZY |
141 | u8 is_green; |
142 | u8 is_dup; | |
8318d78a | 143 | enum ieee80211_band band; |
b481de9c | 144 | u8 ibss_sta_added; |
77626355 BC |
145 | |
146 | /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */ | |
02dede04 | 147 | u32 supp_rates; |
39e88504 | 148 | u16 active_legacy_rate; |
b481de9c | 149 | u16 active_siso_rate; |
fde0db31 GC |
150 | u16 active_mimo2_rate; |
151 | u16 active_mimo3_rate; | |
b481de9c | 152 | u16 active_rate_basic; |
c6ec7a9b | 153 | s8 max_rate_idx; /* Max rate set by user */ |
7d049e5a | 154 | u8 missed_rate_counter; |
77626355 | 155 | |
66c73db7 | 156 | struct iwl_link_quality_cmd lq; |
e227ceac TW |
157 | struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */ |
158 | struct iwl_traffic_load load[TID_MAX_LOAD_COUNT]; | |
0c11b4de | 159 | u8 tx_agg_tid_en; |
5ae212c9 | 160 | #ifdef CONFIG_MAC80211_DEBUGFS |
98d7e09a | 161 | struct dentry *rs_sta_dbgfs_scale_table_file; |
0209dc11 | 162 | struct dentry *rs_sta_dbgfs_stats_table_file; |
0c11b4de | 163 | struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file; |
39e88504 | 164 | u32 dbg_fixed_rate; |
5ae212c9 | 165 | #endif |
6243065d | 166 | struct iwl_priv *drv; |
b7e35008 JB |
167 | |
168 | /* used to be in sta_info */ | |
169 | int last_txrate_idx; | |
12b96817 WYG |
170 | /* last tx rate_n_flags */ |
171 | u32 last_rate_n_flags; | |
b481de9c ZY |
172 | }; |
173 | ||
c79dd5b5 | 174 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c | 175 | struct ieee80211_hdr *hdr, |
4b7679a5 JB |
176 | struct ieee80211_sta *sta, |
177 | struct iwl_lq_sta *lq_sta); | |
fde0db31 | 178 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
e227ceac | 179 | struct iwl_lq_sta *lq_sta, u32 rate_n_flags); |
b481de9c ZY |
180 | |
181 | ||
98d7e09a | 182 | #ifdef CONFIG_MAC80211_DEBUGFS |
e227ceac TW |
183 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
184 | u32 *rate_n_flags, int index); | |
98d7e09a | 185 | #else |
e227ceac TW |
186 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
187 | u32 *rate_n_flags, int index) | |
98d7e09a ZY |
188 | {} |
189 | #endif | |
77626355 BC |
190 | |
191 | /* | |
192 | * Expected throughput metrics for following rates: | |
193 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
194 | * "G" is the only table that supports CCK (the first 4 rates). | |
195 | */ | |
584a0f00 | 196 | |
b481de9c ZY |
197 | static s32 expected_tpt_A[IWL_RATE_COUNT] = { |
198 | 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
199 | }; | |
200 | ||
201 | static s32 expected_tpt_G[IWL_RATE_COUNT] = { | |
202 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
203 | }; | |
204 | ||
205 | static s32 expected_tpt_siso20MHz[IWL_RATE_COUNT] = { | |
206 | 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202 | |
207 | }; | |
208 | ||
209 | static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { | |
210 | 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 | |
211 | }; | |
212 | ||
584a0f00 | 213 | static s32 expected_tpt_mimo2_20MHz[IWL_RATE_COUNT] = { |
b481de9c ZY |
214 | 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 |
215 | }; | |
216 | ||
584a0f00 | 217 | static s32 expected_tpt_mimo2_20MHzSGI[IWL_RATE_COUNT] = { |
b481de9c ZY |
218 | 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 |
219 | }; | |
220 | ||
221 | static s32 expected_tpt_siso40MHz[IWL_RATE_COUNT] = { | |
222 | 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257 | |
223 | }; | |
224 | ||
225 | static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { | |
226 | 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 | |
227 | }; | |
228 | ||
584a0f00 | 229 | static s32 expected_tpt_mimo2_40MHz[IWL_RATE_COUNT] = { |
b481de9c ZY |
230 | 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 |
231 | }; | |
232 | ||
584a0f00 | 233 | static s32 expected_tpt_mimo2_40MHzSGI[IWL_RATE_COUNT] = { |
b481de9c ZY |
234 | 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 |
235 | }; | |
236 | ||
584a0f00 WYG |
237 | /* Expected throughput metric MIMO3 */ |
238 | static s32 expected_tpt_mimo3_20MHz[IWL_RATE_COUNT] = { | |
239 | 0, 0, 0, 0, 99, 99, 153, 186, 208, 239, 256, 263, 268 | |
240 | }; | |
241 | ||
242 | static s32 expected_tpt_mimo3_20MHzSGI[IWL_RATE_COUNT] = { | |
243 | 0, 0, 0, 0, 106, 106, 162, 194, 215, 246, 262, 268, 273 | |
244 | }; | |
245 | ||
246 | static s32 expected_tpt_mimo3_40MHz[IWL_RATE_COUNT] = { | |
247 | 0, 0, 0, 0, 152, 152, 211, 239, 255, 279, 290, 294, 297 | |
248 | }; | |
249 | ||
250 | static s32 expected_tpt_mimo3_40MHzSGI[IWL_RATE_COUNT] = { | |
251 | 0, 0, 0, 0, 160, 160, 219, 245, 261, 284, 294, 297, 300 | |
252 | }; | |
253 | ||
12b96817 WYG |
254 | /* mbps, mcs */ |
255 | const static struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = { | |
256 | {"1", ""}, | |
257 | {"2", ""}, | |
258 | {"5.5", ""}, | |
259 | {"11", ""}, | |
260 | {"6", "BPSK 1/2"}, | |
261 | {"9", "BPSK 1/2"}, | |
262 | {"12", "QPSK 1/2"}, | |
263 | {"18", "QPSK 3/4"}, | |
264 | {"24", "16QAM 1/2"}, | |
265 | {"36", "16QAM 3/4"}, | |
266 | {"48", "64QAM 2/3"}, | |
267 | {"54", "64QAM 3/4"}, | |
268 | {"60", "64QAM 5/6"} | |
269 | }; | |
270 | ||
39e88504 | 271 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
b481de9c ZY |
272 | { |
273 | return (u8)(rate_n_flags & 0xFF); | |
274 | } | |
275 | ||
e227ceac | 276 | static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) |
b481de9c ZY |
277 | { |
278 | window->data = 0; | |
279 | window->success_counter = 0; | |
280 | window->success_ratio = IWL_INVALID_VALUE; | |
281 | window->counter = 0; | |
282 | window->average_tpt = IWL_INVALID_VALUE; | |
283 | window->stamp = 0; | |
b481de9c ZY |
284 | } |
285 | ||
aade00ce GC |
286 | static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
287 | { | |
3ac7f146 | 288 | return (ant_type & valid_antenna) == ant_type; |
aade00ce GC |
289 | } |
290 | ||
0c11b4de RR |
291 | /* |
292 | * removes the old data from the statistics. All data that is older than | |
293 | * TID_MAX_TIME_DIFF, will be deleted. | |
294 | */ | |
e227ceac | 295 | static void rs_tl_rm_old_stats(struct iwl_traffic_load *tl, u32 curr_time) |
0c11b4de RR |
296 | { |
297 | /* The oldest age we want to keep */ | |
298 | u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; | |
299 | ||
300 | while (tl->queue_count && | |
301 | (tl->time_stamp < oldest_time)) { | |
302 | tl->total -= tl->packet_count[tl->head]; | |
303 | tl->packet_count[tl->head] = 0; | |
304 | tl->time_stamp += TID_QUEUE_CELL_SPACING; | |
305 | tl->queue_count--; | |
306 | tl->head++; | |
307 | if (tl->head >= TID_QUEUE_MAX_SIZE) | |
308 | tl->head = 0; | |
309 | } | |
310 | } | |
311 | ||
312 | /* | |
313 | * increment traffic load value for tid and also remove | |
314 | * any old values if passed the certain time period | |
315 | */ | |
e227ceac | 316 | static u8 rs_tl_add_packet(struct iwl_lq_sta *lq_data, |
faa29718 | 317 | struct ieee80211_hdr *hdr) |
0c11b4de RR |
318 | { |
319 | u32 curr_time = jiffies_to_msecs(jiffies); | |
320 | u32 time_diff; | |
321 | s32 index; | |
e227ceac | 322 | struct iwl_traffic_load *tl = NULL; |
54dbb525 | 323 | u8 tid; |
0c11b4de | 324 | |
417f114b | 325 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
fd7c8a40 | 326 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
54dbb525 TW |
327 | tid = qc[0] & 0xf; |
328 | } else | |
faa29718 | 329 | return MAX_TID_COUNT; |
0c11b4de RR |
330 | |
331 | tl = &lq_data->load[tid]; | |
332 | ||
333 | curr_time -= curr_time % TID_ROUND_VALUE; | |
334 | ||
335 | /* Happens only for the first packet. Initialize the data */ | |
336 | if (!(tl->queue_count)) { | |
337 | tl->total = 1; | |
338 | tl->time_stamp = curr_time; | |
339 | tl->queue_count = 1; | |
340 | tl->head = 0; | |
341 | tl->packet_count[0] = 1; | |
faa29718 | 342 | return MAX_TID_COUNT; |
0c11b4de RR |
343 | } |
344 | ||
345 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
346 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
347 | ||
348 | /* The history is too long: remove data that is older than */ | |
349 | /* TID_MAX_TIME_DIFF */ | |
350 | if (index >= TID_QUEUE_MAX_SIZE) | |
351 | rs_tl_rm_old_stats(tl, curr_time); | |
352 | ||
353 | index = (tl->head + index) % TID_QUEUE_MAX_SIZE; | |
354 | tl->packet_count[index] = tl->packet_count[index] + 1; | |
355 | tl->total = tl->total + 1; | |
356 | ||
357 | if ((index + 1) > tl->queue_count) | |
358 | tl->queue_count = index + 1; | |
faa29718 RR |
359 | |
360 | return tid; | |
0c11b4de RR |
361 | } |
362 | ||
363 | /* | |
364 | get the traffic load value for tid | |
365 | */ | |
e227ceac | 366 | static u32 rs_tl_get_load(struct iwl_lq_sta *lq_data, u8 tid) |
0c11b4de RR |
367 | { |
368 | u32 curr_time = jiffies_to_msecs(jiffies); | |
369 | u32 time_diff; | |
370 | s32 index; | |
e227ceac | 371 | struct iwl_traffic_load *tl = NULL; |
0c11b4de RR |
372 | |
373 | if (tid >= TID_MAX_LOAD_COUNT) | |
374 | return 0; | |
375 | ||
376 | tl = &(lq_data->load[tid]); | |
377 | ||
378 | curr_time -= curr_time % TID_ROUND_VALUE; | |
379 | ||
380 | if (!(tl->queue_count)) | |
381 | return 0; | |
382 | ||
383 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
384 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
385 | ||
386 | /* The history is too long: remove data that is older than */ | |
387 | /* TID_MAX_TIME_DIFF */ | |
388 | if (index >= TID_QUEUE_MAX_SIZE) | |
389 | rs_tl_rm_old_stats(tl, curr_time); | |
390 | ||
391 | return tl->total; | |
392 | } | |
393 | ||
c79dd5b5 | 394 | static void rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv, |
e227ceac | 395 | struct iwl_lq_sta *lq_data, u8 tid, |
4b7679a5 | 396 | struct ieee80211_sta *sta) |
0c11b4de | 397 | { |
ff550cb4 | 398 | if (rs_tl_get_load(lq_data, tid) > IWL_AGG_LOAD_THRESHOLD) { |
e1623446 | 399 | IWL_DEBUG_HT(priv, "Starting Tx agg: STA: %pM tid: %d\n", |
e174961c | 400 | sta->addr, tid); |
4b7679a5 | 401 | ieee80211_start_tx_ba_session(priv->hw, sta->addr, tid); |
0c11b4de RR |
402 | } |
403 | } | |
404 | ||
c79dd5b5 | 405 | static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
e227ceac | 406 | struct iwl_lq_sta *lq_data, |
4b7679a5 | 407 | struct ieee80211_sta *sta) |
0c11b4de RR |
408 | { |
409 | if ((tid < TID_MAX_LOAD_COUNT)) | |
410 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
411 | else if (tid == IWL_AGG_ALL_TID) | |
412 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) | |
413 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
414 | } | |
415 | ||
39e88504 | 416 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
fde0db31 | 417 | { |
3ac7f146 TW |
418 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
419 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
420 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
fde0db31 GC |
421 | } |
422 | ||
77626355 BC |
423 | /** |
424 | * rs_collect_tx_data - Update the success/failure sliding window | |
425 | * | |
426 | * We keep a sliding window of the last 62 packets transmitted | |
427 | * at this rate. window->data contains the bitmask of successful | |
428 | * packets. | |
429 | */ | |
e227ceac | 430 | static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, |
99556438 RR |
431 | int scale_index, s32 tpt, int retries, |
432 | int successes) | |
b481de9c | 433 | { |
e227ceac | 434 | struct iwl_rate_scale_data *window = NULL; |
39e88504 | 435 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
b481de9c ZY |
436 | s32 fail_count; |
437 | ||
dc2453ae TW |
438 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
439 | return -EINVAL; | |
b481de9c | 440 | |
77626355 | 441 | /* Select data for current tx bit rate */ |
b481de9c ZY |
442 | window = &(windows[scale_index]); |
443 | ||
77626355 BC |
444 | /* |
445 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
446 | * history window; anything older isn't really relevant any more. | |
447 | * If we have filled up the sliding window, drop the oldest attempt; | |
448 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
449 | * subtract "1" from the success counter (this is the main reason | |
450 | * we keep these bitmaps!). | |
451 | */ | |
99556438 | 452 | while (retries > 0) { |
39e88504 GC |
453 | if (window->counter >= IWL_RATE_MAX_WINDOW) { |
454 | ||
455 | /* remove earliest */ | |
456 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
457 | ||
99556438 RR |
458 | if (window->data & mask) { |
459 | window->data &= ~mask; | |
39e88504 | 460 | window->success_counter--; |
99556438 | 461 | } |
b481de9c | 462 | } |
b481de9c | 463 | |
99556438 RR |
464 | /* Increment frames-attempted counter */ |
465 | window->counter++; | |
466 | ||
467 | /* Shift bitmap by one frame (throw away oldest history), | |
468 | * OR in "1", and increment "success" if this | |
469 | * frame was successful. */ | |
90d7795e | 470 | window->data <<= 1; |
99556438 | 471 | if (successes > 0) { |
39e88504 | 472 | window->success_counter++; |
99556438 RR |
473 | window->data |= 0x1; |
474 | successes--; | |
475 | } | |
77626355 | 476 | |
99556438 | 477 | retries--; |
b481de9c ZY |
478 | } |
479 | ||
77626355 | 480 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
481 | if (window->counter > 0) |
482 | window->success_ratio = 128 * (100 * window->success_counter) | |
483 | / window->counter; | |
484 | else | |
485 | window->success_ratio = IWL_INVALID_VALUE; | |
486 | ||
487 | fail_count = window->counter - window->success_counter; | |
488 | ||
77626355 | 489 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
490 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
491 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
492 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
493 | else | |
494 | window->average_tpt = IWL_INVALID_VALUE; | |
495 | ||
77626355 | 496 | /* Tag this window as having been updated */ |
b481de9c ZY |
497 | window->stamp = jiffies; |
498 | ||
dc2453ae | 499 | return 0; |
b481de9c ZY |
500 | } |
501 | ||
77626355 BC |
502 | /* |
503 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
504 | */ | |
39e88504 | 505 | /* FIXME:RS:remove this function and put the flags statically in the table */ |
978785a3 TW |
506 | static u32 rate_n_flags_from_tbl(struct iwl_priv *priv, |
507 | struct iwl_scale_tbl_info *tbl, | |
508 | int index, u8 use_green) | |
b481de9c | 509 | { |
39e88504 GC |
510 | u32 rate_n_flags = 0; |
511 | ||
b481de9c | 512 | if (is_legacy(tbl->lq_type)) { |
1826dcc0 | 513 | rate_n_flags = iwl_rates[index].plcp; |
b481de9c | 514 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
39e88504 | 515 | rate_n_flags |= RATE_MCS_CCK_MSK; |
b481de9c | 516 | |
fde0db31 GC |
517 | } else if (is_Ht(tbl->lq_type)) { |
518 | if (index > IWL_LAST_OFDM_RATE) { | |
978785a3 | 519 | IWL_ERR(priv, "Invalid HT rate index %d\n", index); |
b481de9c | 520 | index = IWL_LAST_OFDM_RATE; |
fde0db31 | 521 | } |
39e88504 | 522 | rate_n_flags = RATE_MCS_HT_MSK; |
fde0db31 GC |
523 | |
524 | if (is_siso(tbl->lq_type)) | |
1826dcc0 | 525 | rate_n_flags |= iwl_rates[index].plcp_siso; |
fde0db31 | 526 | else if (is_mimo2(tbl->lq_type)) |
1826dcc0 | 527 | rate_n_flags |= iwl_rates[index].plcp_mimo2; |
fde0db31 | 528 | else |
1826dcc0 | 529 | rate_n_flags |= iwl_rates[index].plcp_mimo3; |
b481de9c | 530 | } else { |
978785a3 | 531 | IWL_ERR(priv, "Invalid tbl->lq_type %d\n", tbl->lq_type); |
b481de9c ZY |
532 | } |
533 | ||
39e88504 | 534 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & |
fde0db31 | 535 | RATE_MCS_ANT_ABC_MSK); |
b481de9c | 536 | |
39e88504 GC |
537 | if (is_Ht(tbl->lq_type)) { |
538 | if (tbl->is_fat) { | |
539 | if (tbl->is_dup) | |
540 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
541 | else | |
542 | rate_n_flags |= RATE_MCS_FAT_MSK; | |
543 | } | |
544 | if (tbl->is_SGI) | |
545 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
546 | ||
547 | if (use_green) { | |
548 | rate_n_flags |= RATE_MCS_GF_MSK; | |
549 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
550 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
978785a3 | 551 | IWL_ERR(priv, "GF was set with SGI:SISO\n"); |
39e88504 GC |
552 | } |
553 | } | |
b481de9c | 554 | } |
39e88504 | 555 | return rate_n_flags; |
b481de9c ZY |
556 | } |
557 | ||
77626355 BC |
558 | /* |
559 | * Interpret uCode API's rate_n_flags format, | |
560 | * fill "search" or "active" tx mode table. | |
561 | */ | |
39e88504 | 562 | static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
8318d78a | 563 | enum ieee80211_band band, |
e227ceac | 564 | struct iwl_scale_tbl_info *tbl, |
b481de9c ZY |
565 | int *rate_idx) |
566 | { | |
39e88504 GC |
567 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
568 | u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); | |
569 | u8 mcs; | |
b481de9c | 570 | |
e7d326ac | 571 | *rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags); |
b481de9c | 572 | |
fde0db31 | 573 | if (*rate_idx == IWL_RATE_INVALID) { |
b481de9c | 574 | *rate_idx = -1; |
dc2453ae | 575 | return -EINVAL; |
b481de9c | 576 | } |
77626355 | 577 | tbl->is_SGI = 0; /* default legacy setup */ |
b481de9c ZY |
578 | tbl->is_fat = 0; |
579 | tbl->is_dup = 0; | |
fde0db31 GC |
580 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
581 | tbl->lq_type = LQ_NONE; | |
b481de9c | 582 | |
77626355 | 583 | /* legacy rate format */ |
39e88504 | 584 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
fde0db31 | 585 | if (num_of_ant == 1) { |
8318d78a | 586 | if (band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
587 | tbl->lq_type = LQ_A; |
588 | else | |
589 | tbl->lq_type = LQ_G; | |
b481de9c | 590 | } |
fde0db31 | 591 | /* HT rate format */ |
b481de9c | 592 | } else { |
39e88504 | 593 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
b481de9c ZY |
594 | tbl->is_SGI = 1; |
595 | ||
39e88504 GC |
596 | if ((rate_n_flags & RATE_MCS_FAT_MSK) || |
597 | (rate_n_flags & RATE_MCS_DUP_MSK)) | |
b481de9c ZY |
598 | tbl->is_fat = 1; |
599 | ||
39e88504 | 600 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
b481de9c | 601 | tbl->is_dup = 1; |
fde0db31 | 602 | |
39e88504 | 603 | mcs = rs_extract_rate(rate_n_flags); |
fde0db31 | 604 | |
39e88504 GC |
605 | /* SISO */ |
606 | if (mcs <= IWL_RATE_SISO_60M_PLCP) { | |
fde0db31 GC |
607 | if (num_of_ant == 1) |
608 | tbl->lq_type = LQ_SISO; /*else NONE*/ | |
609 | /* MIMO2 */ | |
39e88504 | 610 | } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
fde0db31 GC |
611 | if (num_of_ant == 2) |
612 | tbl->lq_type = LQ_MIMO2; | |
613 | /* MIMO3 */ | |
614 | } else { | |
615 | if (num_of_ant == 3) | |
616 | tbl->lq_type = LQ_MIMO3; | |
617 | } | |
b481de9c ZY |
618 | } |
619 | return 0; | |
620 | } | |
aade00ce GC |
621 | |
622 | /* switch to another antenna/antennas and return 1 */ | |
623 | /* if no other valid antenna found, return 0 */ | |
624 | static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, | |
e227ceac | 625 | struct iwl_scale_tbl_info *tbl) |
b481de9c | 626 | { |
aade00ce GC |
627 | u8 new_ant_type; |
628 | ||
629 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
630 | return 0; | |
631 | ||
632 | if (!rs_is_valid_ant(valid_ant, tbl->ant_type)) | |
633 | return 0; | |
634 | ||
635 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
636 | ||
637 | while ((new_ant_type != tbl->ant_type) && | |
638 | !rs_is_valid_ant(valid_ant, new_ant_type)) | |
639 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
640 | ||
641 | if (new_ant_type == tbl->ant_type) | |
642 | return 0; | |
643 | ||
644 | tbl->ant_type = new_ant_type; | |
645 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
646 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
647 | return 1; | |
b481de9c ZY |
648 | } |
649 | ||
39e88504 | 650 | /* FIXME:RS: in 4965 we don't use greenfield at all */ |
f935a6da | 651 | /* FIXME:RS: don't use greenfield for now in TX */ |
f935a6da GC |
652 | #if 0 |
653 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) | |
b481de9c | 654 | { |
3ac7f146 | 655 | return (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) && |
270243a5 | 656 | priv->current_ht_config.is_green_field && |
3ac7f146 | 657 | !priv->current_ht_config.non_GF_STA_present; |
f935a6da | 658 | } |
4f85f5b3 | 659 | #endif |
f935a6da GC |
660 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) |
661 | { | |
dc2453ae | 662 | return 0; |
b481de9c ZY |
663 | } |
664 | ||
665 | /** | |
666 | * rs_get_supported_rates - get the available rates | |
667 | * | |
668 | * if management frame or broadcast frame only return | |
669 | * basic available rates. | |
670 | * | |
671 | */ | |
e227ceac TW |
672 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
673 | struct ieee80211_hdr *hdr, | |
674 | enum iwl_table_type rate_type) | |
b481de9c | 675 | { |
eecd6e57 GC |
676 | if (hdr && is_multicast_ether_addr(hdr->addr1) && |
677 | lq_sta->active_rate_basic) | |
678 | return lq_sta->active_rate_basic; | |
679 | ||
680 | if (is_legacy(rate_type)) { | |
681 | return lq_sta->active_legacy_rate; | |
682 | } else { | |
b481de9c | 683 | if (is_siso(rate_type)) |
eecd6e57 | 684 | return lq_sta->active_siso_rate; |
fde0db31 | 685 | else if (is_mimo2(rate_type)) |
eecd6e57 | 686 | return lq_sta->active_mimo2_rate; |
b481de9c | 687 | else |
eecd6e57 | 688 | return lq_sta->active_mimo3_rate; |
c33104f0 | 689 | } |
b481de9c ZY |
690 | } |
691 | ||
bf403db8 EK |
692 | static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask, |
693 | int rate_type) | |
b481de9c ZY |
694 | { |
695 | u8 high = IWL_RATE_INVALID; | |
696 | u8 low = IWL_RATE_INVALID; | |
697 | ||
01ebd063 | 698 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
699 | * the rate table */ |
700 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
701 | int i; | |
702 | u32 mask; | |
703 | ||
704 | /* Find the previous rate that is in the rate mask */ | |
705 | i = index - 1; | |
706 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
707 | if (rate_mask & mask) { | |
708 | low = i; | |
709 | break; | |
710 | } | |
711 | } | |
712 | ||
713 | /* Find the next rate that is in the rate mask */ | |
714 | i = index + 1; | |
715 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
716 | if (rate_mask & mask) { | |
717 | high = i; | |
718 | break; | |
719 | } | |
720 | } | |
721 | ||
722 | return (high << 8) | low; | |
723 | } | |
724 | ||
725 | low = index; | |
726 | while (low != IWL_RATE_INVALID) { | |
1826dcc0 | 727 | low = iwl_rates[low].prev_rs; |
b481de9c ZY |
728 | if (low == IWL_RATE_INVALID) |
729 | break; | |
730 | if (rate_mask & (1 << low)) | |
731 | break; | |
e1623446 | 732 | IWL_DEBUG_RATE(priv, "Skipping masked lower rate: %d\n", low); |
b481de9c ZY |
733 | } |
734 | ||
735 | high = index; | |
736 | while (high != IWL_RATE_INVALID) { | |
1826dcc0 | 737 | high = iwl_rates[high].next_rs; |
b481de9c ZY |
738 | if (high == IWL_RATE_INVALID) |
739 | break; | |
740 | if (rate_mask & (1 << high)) | |
741 | break; | |
e1623446 | 742 | IWL_DEBUG_RATE(priv, "Skipping masked higher rate: %d\n", high); |
b481de9c ZY |
743 | } |
744 | ||
745 | return (high << 8) | low; | |
746 | } | |
747 | ||
e227ceac TW |
748 | static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta, |
749 | struct iwl_scale_tbl_info *tbl, | |
750 | u8 scale_index, u8 ht_possible) | |
b481de9c | 751 | { |
b481de9c ZY |
752 | s32 low; |
753 | u16 rate_mask; | |
754 | u16 high_low; | |
755 | u8 switch_to_legacy = 0; | |
c33104f0 | 756 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
757 | |
758 | /* check if we need to switch from HT to legacy rates. | |
759 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
760 | * are always supported (spec demand) */ | |
761 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
762 | switch_to_legacy = 1; | |
763 | scale_index = rs_ht_to_legacy[scale_index]; | |
8318d78a | 764 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
765 | tbl->lq_type = LQ_A; |
766 | else | |
767 | tbl->lq_type = LQ_G; | |
768 | ||
69fdb309 | 769 | if (num_of_ant(tbl->ant_type) > 1) |
fde0db31 | 770 | tbl->ant_type = ANT_A;/*FIXME:RS*/ |
b481de9c ZY |
771 | |
772 | tbl->is_fat = 0; | |
773 | tbl->is_SGI = 0; | |
774 | } | |
775 | ||
eecd6e57 | 776 | rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
b481de9c | 777 | |
77626355 | 778 | /* Mask with station rate restriction */ |
b481de9c | 779 | if (is_legacy(tbl->lq_type)) { |
77626355 | 780 | /* supp_rates has no CCK bits in A mode */ |
8318d78a | 781 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c | 782 | rate_mask = (u16)(rate_mask & |
c33104f0 | 783 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 784 | else |
c33104f0 | 785 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
786 | } |
787 | ||
77626355 | 788 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 789 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
39e88504 GC |
790 | low = scale_index; |
791 | goto out; | |
b481de9c ZY |
792 | } |
793 | ||
bf403db8 EK |
794 | high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask, |
795 | tbl->lq_type); | |
b481de9c ZY |
796 | low = high_low & 0xff; |
797 | ||
39e88504 GC |
798 | if (low == IWL_RATE_INVALID) |
799 | low = scale_index; | |
800 | ||
801 | out: | |
978785a3 | 802 | return rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green); |
b481de9c ZY |
803 | } |
804 | ||
77626355 BC |
805 | /* |
806 | * mac80211 sends us Tx status | |
807 | */ | |
4b7679a5 JB |
808 | static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband, |
809 | struct ieee80211_sta *sta, void *priv_sta, | |
e039fa4a | 810 | struct sk_buff *skb) |
b481de9c ZY |
811 | { |
812 | int status; | |
813 | u8 retries; | |
814 | int rs_index, index = 0; | |
417f114b | 815 | struct iwl_lq_sta *lq_sta = priv_sta; |
66c73db7 | 816 | struct iwl_link_quality_cmd *table; |
b481de9c | 817 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
4b7679a5 JB |
818 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
819 | struct ieee80211_hw *hw = priv->hw; | |
e039fa4a | 820 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e227ceac TW |
821 | struct iwl_rate_scale_data *window = NULL; |
822 | struct iwl_rate_scale_data *search_win = NULL; | |
39e88504 | 823 | u32 tx_rate; |
e227ceac TW |
824 | struct iwl_scale_tbl_info tbl_type; |
825 | struct iwl_scale_tbl_info *curr_tbl, *search_tbl; | |
b481de9c | 826 | u8 active_index = 0; |
b481de9c ZY |
827 | s32 tpt = 0; |
828 | ||
e1623446 | 829 | IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n"); |
b481de9c | 830 | |
417f114b TW |
831 | if (!ieee80211_is_data(hdr->frame_control) || |
832 | is_multicast_ether_addr(hdr->addr1)) | |
b481de9c ZY |
833 | return; |
834 | ||
99556438 | 835 | /* This packet was aggregated but doesn't carry rate scale info */ |
e039fa4a JB |
836 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
837 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
99556438 RR |
838 | return; |
839 | ||
8fe72311 WYG |
840 | if (info->flags & IEEE80211_TX_STAT_AMPDU) |
841 | retries = 0; | |
842 | else | |
843 | retries = info->status.rates[0].count - 1; | |
b481de9c ZY |
844 | |
845 | if (retries > 15) | |
846 | retries = 15; | |
847 | ||
05c914fe | 848 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 849 | !lq_sta->ibss_sta_added) |
f4d6082d | 850 | goto out; |
b481de9c | 851 | |
c33104f0 TW |
852 | table = &lq_sta->lq; |
853 | active_index = lq_sta->active_tbl; | |
b481de9c | 854 | |
c33104f0 TW |
855 | curr_tbl = &(lq_sta->lq_info[active_index]); |
856 | search_tbl = &(lq_sta->lq_info[(1 - active_index)]); | |
e227ceac TW |
857 | window = (struct iwl_rate_scale_data *)&(curr_tbl->win[0]); |
858 | search_win = (struct iwl_rate_scale_data *)&(search_tbl->win[0]); | |
b481de9c | 859 | |
77626355 BC |
860 | /* |
861 | * Ignore this Tx frame response if its initial rate doesn't match | |
862 | * that of latest Link Quality command. There may be stragglers | |
863 | * from a previous Link Quality command, but we're no longer interested | |
864 | * in those; they're either from the "active" mode while we're trying | |
865 | * to check "search" mode, or a prior "search" mode after we've moved | |
866 | * to a new "search" mode (which might become the new "active" mode). | |
867 | */ | |
39e88504 GC |
868 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
869 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
4c424e4c RR |
870 | if (priv->band == IEEE80211_BAND_5GHZ) |
871 | rs_index -= IWL_FIRST_OFDM_RATE; | |
872 | ||
e6a9854b JB |
873 | if ((info->status.rates[0].idx < 0) || |
874 | (tbl_type.is_SGI != !!(info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)) || | |
875 | (tbl_type.is_fat != !!(info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)) || | |
876 | (tbl_type.is_dup != !!(info->status.rates[0].flags & IEEE80211_TX_RC_DUP_DATA)) || | |
877 | (tbl_type.ant_type != info->antenna_sel_tx) || | |
878 | (!!(tx_rate & RATE_MCS_HT_MSK) != !!(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) || | |
879 | (!!(tx_rate & RATE_MCS_GF_MSK) != !!(info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)) || | |
4c424e4c | 880 | (hw->wiphy->bands[priv->band]->bitrates[rs_index].bitrate != |
e6a9854b | 881 | hw->wiphy->bands[info->band]->bitrates[info->status.rates[0].idx].bitrate)) { |
e1623446 | 882 | IWL_DEBUG_RATE(priv, "initial rate does not match 0x%x\n", tx_rate); |
d5e49036 MA |
883 | /* the last LQ command could failed so the LQ in ucode not |
884 | * the same in driver sync up | |
885 | */ | |
7d049e5a AM |
886 | lq_sta->missed_rate_counter++; |
887 | if (lq_sta->missed_rate_counter > IWL_MISSED_RATE_MAX) { | |
888 | lq_sta->missed_rate_counter = 0; | |
889 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); | |
890 | } | |
f4d6082d | 891 | goto out; |
b481de9c ZY |
892 | } |
893 | ||
7d049e5a | 894 | lq_sta->missed_rate_counter = 0; |
77626355 | 895 | /* Update frame history window with "failure" for each Tx retry. */ |
b481de9c | 896 | while (retries) { |
77626355 BC |
897 | /* Look up the rate and other info used for each tx attempt. |
898 | * Each tx attempt steps one entry deeper in the rate table. */ | |
39e88504 GC |
899 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
900 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, | |
b481de9c ZY |
901 | &tbl_type, &rs_index); |
902 | ||
77626355 BC |
903 | /* If type matches "search" table, |
904 | * add failure to "search" history */ | |
b481de9c | 905 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 906 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
907 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
908 | if (search_tbl->expected_tpt) | |
909 | tpt = search_tbl->expected_tpt[rs_index]; | |
910 | else | |
911 | tpt = 0; | |
99556438 | 912 | rs_collect_tx_data(search_win, rs_index, tpt, 1, 0); |
77626355 BC |
913 | |
914 | /* Else if type matches "current/active" table, | |
915 | * add failure to "current/active" history */ | |
b481de9c | 916 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 917 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
918 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
919 | if (curr_tbl->expected_tpt) | |
920 | tpt = curr_tbl->expected_tpt[rs_index]; | |
921 | else | |
922 | tpt = 0; | |
99556438 | 923 | rs_collect_tx_data(window, rs_index, tpt, 1, 0); |
b481de9c | 924 | } |
77626355 BC |
925 | |
926 | /* If not searching for a new mode, increment failed counter | |
927 | * ... this helps determine when to start searching again */ | |
c33104f0 TW |
928 | if (lq_sta->stay_in_tbl) |
929 | lq_sta->total_failed++; | |
b481de9c ZY |
930 | --retries; |
931 | index++; | |
932 | ||
933 | } | |
934 | ||
77626355 BC |
935 | /* |
936 | * Find (by rate) the history window to update with final Tx attempt; | |
937 | * if Tx was successful first try, use original rate, | |
938 | * else look up the rate that was, finally, successful. | |
939 | */ | |
39e88504 | 940 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
12b96817 | 941 | lq_sta->last_rate_n_flags = tx_rate; |
39e88504 | 942 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); |
b481de9c | 943 | |
77626355 | 944 | /* Update frame history window with "success" if Tx got ACKed ... */ |
e039fa4a | 945 | status = !!(info->flags & IEEE80211_TX_STAT_ACK); |
b481de9c | 946 | |
77626355 BC |
947 | /* If type matches "search" table, |
948 | * add final tx status to "search" history */ | |
b481de9c | 949 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 950 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
951 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
952 | if (search_tbl->expected_tpt) | |
953 | tpt = search_tbl->expected_tpt[rs_index]; | |
954 | else | |
955 | tpt = 0; | |
df36c044 | 956 | if (info->flags & IEEE80211_TX_STAT_AMPDU) |
99556438 | 957 | rs_collect_tx_data(search_win, rs_index, tpt, |
e039fa4a JB |
958 | info->status.ampdu_ack_len, |
959 | info->status.ampdu_ack_map); | |
99556438 RR |
960 | else |
961 | rs_collect_tx_data(search_win, rs_index, tpt, | |
962 | 1, status); | |
77626355 BC |
963 | /* Else if type matches "current/active" table, |
964 | * add final tx status to "current/active" history */ | |
b481de9c | 965 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 966 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
967 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
968 | if (curr_tbl->expected_tpt) | |
969 | tpt = curr_tbl->expected_tpt[rs_index]; | |
970 | else | |
971 | tpt = 0; | |
df36c044 | 972 | if (info->flags & IEEE80211_TX_STAT_AMPDU) |
99556438 | 973 | rs_collect_tx_data(window, rs_index, tpt, |
e039fa4a JB |
974 | info->status.ampdu_ack_len, |
975 | info->status.ampdu_ack_map); | |
99556438 RR |
976 | else |
977 | rs_collect_tx_data(window, rs_index, tpt, | |
978 | 1, status); | |
b481de9c ZY |
979 | } |
980 | ||
77626355 BC |
981 | /* If not searching for new mode, increment success/failed counter |
982 | * ... these help determine when to start searching again */ | |
c33104f0 | 983 | if (lq_sta->stay_in_tbl) { |
df36c044 | 984 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { |
e039fa4a | 985 | lq_sta->total_success += info->status.ampdu_ack_map; |
99556438 | 986 | lq_sta->total_failed += |
e039fa4a | 987 | (info->status.ampdu_ack_len - info->status.ampdu_ack_map); |
99556438 RR |
988 | } else { |
989 | if (status) | |
990 | lq_sta->total_success++; | |
991 | else | |
992 | lq_sta->total_failed++; | |
993 | } | |
b481de9c ZY |
994 | } |
995 | ||
77626355 | 996 | /* See if there's a better rate or modulation mode to try. */ |
c338ba3c AM |
997 | if (sta && sta->supp_rates[sband->band]) |
998 | rs_rate_scale_perform(priv, hdr, sta, lq_sta); | |
f4d6082d | 999 | out: |
b481de9c ZY |
1000 | return; |
1001 | } | |
1002 | ||
77626355 BC |
1003 | /* |
1004 | * Begin a period of staying with a selected modulation mode. | |
1005 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
1006 | * Set frame tx success limits according to legacy vs. high-throughput, | |
1007 | * and reset overall (spanning all rates) tx success history statistics. | |
1008 | * These control how long we stay using same modulation mode before | |
1009 | * searching for a new mode. | |
1010 | */ | |
bf403db8 | 1011 | static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, |
e227ceac | 1012 | struct iwl_lq_sta *lq_sta) |
b481de9c | 1013 | { |
e1623446 | 1014 | IWL_DEBUG_RATE(priv, "we are staying in the same table\n"); |
c33104f0 | 1015 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 1016 | if (is_legacy) { |
c33104f0 TW |
1017 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
1018 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
1019 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 1020 | } else { |
c33104f0 TW |
1021 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
1022 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
1023 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 1024 | } |
c33104f0 TW |
1025 | lq_sta->table_count = 0; |
1026 | lq_sta->total_failed = 0; | |
1027 | lq_sta->total_success = 0; | |
b481de9c ZY |
1028 | } |
1029 | ||
77626355 BC |
1030 | /* |
1031 | * Find correct throughput table for given mode of modulation | |
1032 | */ | |
e227ceac TW |
1033 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
1034 | struct iwl_scale_tbl_info *tbl) | |
b481de9c ZY |
1035 | { |
1036 | if (is_legacy(tbl->lq_type)) { | |
1037 | if (!is_a_band(tbl->lq_type)) | |
1038 | tbl->expected_tpt = expected_tpt_G; | |
1039 | else | |
1040 | tbl->expected_tpt = expected_tpt_A; | |
1041 | } else if (is_siso(tbl->lq_type)) { | |
c33104f0 | 1042 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1043 | if (tbl->is_SGI) |
1044 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
1045 | else | |
1046 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
1047 | else if (tbl->is_SGI) | |
1048 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
1049 | else | |
1050 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
584a0f00 WYG |
1051 | } else if (is_mimo2(tbl->lq_type)) { |
1052 | if (tbl->is_fat && !lq_sta->is_dup) | |
1053 | if (tbl->is_SGI) | |
1054 | tbl->expected_tpt = expected_tpt_mimo2_40MHzSGI; | |
1055 | else | |
1056 | tbl->expected_tpt = expected_tpt_mimo2_40MHz; | |
1057 | else if (tbl->is_SGI) | |
1058 | tbl->expected_tpt = expected_tpt_mimo2_20MHzSGI; | |
1059 | else | |
1060 | tbl->expected_tpt = expected_tpt_mimo2_20MHz; | |
1061 | } else if (is_mimo3(tbl->lq_type)) { | |
c33104f0 | 1062 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c | 1063 | if (tbl->is_SGI) |
584a0f00 | 1064 | tbl->expected_tpt = expected_tpt_mimo3_40MHzSGI; |
b481de9c | 1065 | else |
584a0f00 | 1066 | tbl->expected_tpt = expected_tpt_mimo3_40MHz; |
b481de9c | 1067 | else if (tbl->is_SGI) |
584a0f00 | 1068 | tbl->expected_tpt = expected_tpt_mimo3_20MHzSGI; |
b481de9c | 1069 | else |
584a0f00 | 1070 | tbl->expected_tpt = expected_tpt_mimo3_20MHz; |
b481de9c ZY |
1071 | } else |
1072 | tbl->expected_tpt = expected_tpt_G; | |
1073 | } | |
1074 | ||
77626355 BC |
1075 | /* |
1076 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1077 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1078 | * above the current measured throughput of "active" mode, to give new mode | |
1079 | * a fair chance to prove itself without too many challenges. | |
1080 | * | |
1081 | * This gets called when transitioning to more aggressive modulation | |
1082 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1083 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1084 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1085 | * bit rate will typically need to increase, but not if performance was bad. | |
1086 | */ | |
c79dd5b5 | 1087 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
e227ceac TW |
1088 | struct iwl_lq_sta *lq_sta, |
1089 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
f935a6da | 1090 | u16 rate_mask, s8 index) |
b481de9c | 1091 | { |
77626355 | 1092 | /* "active" values */ |
e227ceac | 1093 | struct iwl_scale_tbl_info *active_tbl = |
c33104f0 | 1094 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1095 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1096 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 BC |
1097 | |
1098 | /* expected "search" throughput */ | |
1099 | s32 *tpt_tbl = tbl->expected_tpt; | |
1100 | ||
1101 | s32 new_rate, high, low, start_hi; | |
b481de9c | 1102 | u16 high_low; |
f935a6da | 1103 | s8 rate = index; |
b481de9c ZY |
1104 | |
1105 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1106 | ||
1107 | for (; ;) { | |
bf403db8 EK |
1108 | high_low = rs_get_adjacent_rate(priv, rate, rate_mask, |
1109 | tbl->lq_type); | |
b481de9c ZY |
1110 | |
1111 | low = high_low & 0xff; | |
1112 | high = (high_low >> 8) & 0xff; | |
1113 | ||
77626355 BC |
1114 | /* |
1115 | * Lower the "search" bit rate, to give new "search" mode | |
1116 | * approximately the same throughput as "active" if: | |
1117 | * | |
1118 | * 1) "Active" mode has been working modestly well (but not | |
1119 | * great), and expected "search" throughput (under perfect | |
1120 | * conditions) at candidate rate is above the actual | |
1121 | * measured "active" throughput (but less than expected | |
1122 | * "active" throughput under perfect conditions). | |
1123 | * OR | |
1124 | * 2) "Active" mode has been working perfectly or very well | |
1125 | * and expected "search" throughput (under perfect | |
1126 | * conditions) at candidate rate is above expected | |
1127 | * "active" throughput (under perfect conditions). | |
1128 | */ | |
c33104f0 | 1129 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1130 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1131 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1132 | (tpt_tbl[rate] <= active_tpt))) || | |
1133 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1134 | (tpt_tbl[rate] > active_tpt))) { | |
1135 | ||
77626355 BC |
1136 | /* (2nd or later pass) |
1137 | * If we've already tried to raise the rate, and are | |
1138 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1139 | if (start_hi != IWL_RATE_INVALID) { |
1140 | new_rate = start_hi; | |
1141 | break; | |
1142 | } | |
77626355 | 1143 | |
b481de9c | 1144 | new_rate = rate; |
77626355 BC |
1145 | |
1146 | /* Loop again with lower rate */ | |
b481de9c ZY |
1147 | if (low != IWL_RATE_INVALID) |
1148 | rate = low; | |
77626355 BC |
1149 | |
1150 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1151 | else |
1152 | break; | |
77626355 BC |
1153 | |
1154 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1155 | } else { |
77626355 BC |
1156 | /* (2nd or later pass) |
1157 | * If we've already tried to lower the rate, and are | |
1158 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1159 | if (new_rate != IWL_RATE_INVALID) |
1160 | break; | |
77626355 BC |
1161 | |
1162 | /* Loop again with higher rate */ | |
b481de9c ZY |
1163 | else if (high != IWL_RATE_INVALID) { |
1164 | start_hi = high; | |
1165 | rate = high; | |
77626355 BC |
1166 | |
1167 | /* Higher rate not available, use the original */ | |
b481de9c | 1168 | } else { |
90d7795e | 1169 | new_rate = rate; |
b481de9c ZY |
1170 | break; |
1171 | } | |
1172 | } | |
1173 | } | |
1174 | ||
1175 | return new_rate; | |
1176 | } | |
b481de9c | 1177 | |
77626355 | 1178 | /* |
584a0f00 | 1179 | * Set up search table for MIMO2 |
77626355 | 1180 | */ |
fde0db31 | 1181 | static int rs_switch_to_mimo2(struct iwl_priv *priv, |
e227ceac | 1182 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1183 | struct ieee80211_conf *conf, |
4b7679a5 | 1184 | struct ieee80211_sta *sta, |
e227ceac | 1185 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1186 | { |
b481de9c ZY |
1187 | u16 rate_mask; |
1188 | s32 rate; | |
c33104f0 | 1189 | s8 is_green = lq_sta->is_green; |
b481de9c | 1190 | |
de27e64e | 1191 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
b481de9c ZY |
1192 | return -1; |
1193 | ||
d9fe60de | 1194 | if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) |
00c5ae2f | 1195 | == WLAN_HT_CAP_SM_PS_STATIC) |
b481de9c ZY |
1196 | return -1; |
1197 | ||
77626355 | 1198 | /* Need both Tx chains/antennas to support MIMO */ |
aade00ce | 1199 | if (priv->hw_params.tx_chains_num < 2) |
b481de9c ZY |
1200 | return -1; |
1201 | ||
e1623446 | 1202 | IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO2\n"); |
39e88504 GC |
1203 | |
1204 | tbl->lq_type = LQ_MIMO2; | |
c33104f0 | 1205 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1206 | tbl->action = 0; |
39e88504 GC |
1207 | rate_mask = lq_sta->active_mimo2_rate; |
1208 | ||
270243a5 | 1209 | if (priv->current_ht_config.supported_chan_width |
39e88504 | 1210 | == IWL_CHANNEL_WIDTH_40MHZ) |
b481de9c ZY |
1211 | tbl->is_fat = 1; |
1212 | else | |
1213 | tbl->is_fat = 0; | |
1214 | ||
39e88504 | 1215 | /* FIXME: - don't toggle SGI here |
b481de9c | 1216 | if (tbl->is_fat) { |
270243a5 | 1217 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1218 | tbl->is_SGI = 1; |
1219 | else | |
1220 | tbl->is_SGI = 0; | |
270243a5 | 1221 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1222 | tbl->is_SGI = 1; |
1223 | else | |
1224 | tbl->is_SGI = 0; | |
39e88504 | 1225 | */ |
b481de9c | 1226 | |
eecd6e57 | 1227 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1228 | |
f935a6da | 1229 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1230 | |
e1623446 | 1231 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
584a0f00 WYG |
1232 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
1233 | IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", | |
1234 | rate, rate_mask); | |
1235 | return -1; | |
1236 | } | |
1237 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); | |
1238 | ||
1239 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", | |
1240 | tbl->current_rate, is_green); | |
1241 | return 0; | |
1242 | } | |
1243 | ||
1244 | /* | |
1245 | * Set up search table for MIMO3 | |
1246 | */ | |
1247 | static int rs_switch_to_mimo3(struct iwl_priv *priv, | |
1248 | struct iwl_lq_sta *lq_sta, | |
1249 | struct ieee80211_conf *conf, | |
1250 | struct ieee80211_sta *sta, | |
1251 | struct iwl_scale_tbl_info *tbl, int index) | |
1252 | { | |
1253 | u16 rate_mask; | |
1254 | s32 rate; | |
1255 | s8 is_green = lq_sta->is_green; | |
1256 | ||
1257 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) | |
1258 | return -1; | |
1259 | ||
1260 | if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) | |
1261 | == WLAN_HT_CAP_SM_PS_STATIC) | |
1262 | return -1; | |
1263 | ||
1264 | /* Need both Tx chains/antennas to support MIMO */ | |
1265 | if (priv->hw_params.tx_chains_num < 3) | |
1266 | return -1; | |
1267 | ||
1268 | IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO3\n"); | |
1269 | ||
1270 | tbl->lq_type = LQ_MIMO3; | |
1271 | tbl->is_dup = lq_sta->is_dup; | |
1272 | tbl->action = 0; | |
1273 | rate_mask = lq_sta->active_mimo3_rate; | |
1274 | ||
1275 | if (priv->current_ht_config.supported_chan_width | |
1276 | == IWL_CHANNEL_WIDTH_40MHZ) | |
1277 | tbl->is_fat = 1; | |
1278 | else | |
1279 | tbl->is_fat = 0; | |
39e88504 | 1280 | |
584a0f00 WYG |
1281 | /* FIXME: - don't toggle SGI here |
1282 | if (tbl->is_fat) { | |
1283 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) | |
1284 | tbl->is_SGI = 1; | |
1285 | else | |
1286 | tbl->is_SGI = 0; | |
1287 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) | |
1288 | tbl->is_SGI = 1; | |
1289 | else | |
1290 | tbl->is_SGI = 0; | |
1291 | */ | |
1292 | ||
1293 | rs_set_expected_tpt_table(lq_sta, tbl); | |
1294 | ||
1295 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); | |
1296 | ||
1297 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 best rate %d mask %X\n", | |
1298 | rate, rate_mask); | |
39e88504 | 1299 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
e1623446 | 1300 | IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", |
39e88504 | 1301 | rate, rate_mask); |
b481de9c | 1302 | return -1; |
39e88504 | 1303 | } |
978785a3 | 1304 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
b481de9c | 1305 | |
e1623446 | 1306 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1307 | tbl->current_rate, is_green); |
dc2453ae | 1308 | return 0; |
fde0db31 | 1309 | } |
b481de9c | 1310 | |
77626355 BC |
1311 | /* |
1312 | * Set up search table for SISO | |
1313 | */ | |
c79dd5b5 | 1314 | static int rs_switch_to_siso(struct iwl_priv *priv, |
e227ceac | 1315 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1316 | struct ieee80211_conf *conf, |
4b7679a5 | 1317 | struct ieee80211_sta *sta, |
e227ceac | 1318 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1319 | { |
b481de9c | 1320 | u16 rate_mask; |
c33104f0 | 1321 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
1322 | s32 rate; |
1323 | ||
de27e64e | 1324 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
b481de9c ZY |
1325 | return -1; |
1326 | ||
e1623446 | 1327 | IWL_DEBUG_RATE(priv, "LQ: try to switch to SISO\n"); |
39e88504 | 1328 | |
c33104f0 | 1329 | tbl->is_dup = lq_sta->is_dup; |
b481de9c ZY |
1330 | tbl->lq_type = LQ_SISO; |
1331 | tbl->action = 0; | |
39e88504 | 1332 | rate_mask = lq_sta->active_siso_rate; |
b481de9c | 1333 | |
270243a5 RR |
1334 | if (priv->current_ht_config.supported_chan_width |
1335 | == IWL_CHANNEL_WIDTH_40MHZ) | |
b481de9c ZY |
1336 | tbl->is_fat = 1; |
1337 | else | |
1338 | tbl->is_fat = 0; | |
1339 | ||
39e88504 | 1340 | /* FIXME: - don't toggle SGI here |
b481de9c | 1341 | if (tbl->is_fat) { |
270243a5 | 1342 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1343 | tbl->is_SGI = 1; |
1344 | else | |
1345 | tbl->is_SGI = 0; | |
270243a5 | 1346 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1347 | tbl->is_SGI = 1; |
1348 | else | |
1349 | tbl->is_SGI = 0; | |
39e88504 | 1350 | */ |
b481de9c ZY |
1351 | |
1352 | if (is_green) | |
39e88504 | 1353 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ |
b481de9c | 1354 | |
eecd6e57 | 1355 | rs_set_expected_tpt_table(lq_sta, tbl); |
f935a6da | 1356 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1357 | |
e1623446 | 1358 | IWL_DEBUG_RATE(priv, "LQ: get best rate %d mask %X\n", rate, rate_mask); |
b481de9c | 1359 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
e1623446 | 1360 | IWL_DEBUG_RATE(priv, "can not switch with index %d rate mask %x\n", |
b481de9c ZY |
1361 | rate, rate_mask); |
1362 | return -1; | |
1363 | } | |
978785a3 | 1364 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
e1623446 | 1365 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1366 | tbl->current_rate, is_green); |
403ab56b | 1367 | return 0; |
b481de9c ZY |
1368 | } |
1369 | ||
77626355 BC |
1370 | /* |
1371 | * Try to switch to new modulation mode from legacy | |
1372 | */ | |
c79dd5b5 | 1373 | static int rs_move_legacy_other(struct iwl_priv *priv, |
e227ceac | 1374 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1375 | struct ieee80211_conf *conf, |
4b7679a5 | 1376 | struct ieee80211_sta *sta, |
b481de9c ZY |
1377 | int index) |
1378 | { | |
e227ceac TW |
1379 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1380 | struct iwl_scale_tbl_info *search_tbl = | |
1381 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1382 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1383 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1384 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1385 | u8 start_action = tbl->action; |
fde0db31 | 1386 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1387 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
fde0db31 | 1388 | int ret = 0; |
b481de9c ZY |
1389 | |
1390 | for (; ;) { | |
1391 | switch (tbl->action) { | |
3110bef7 GC |
1392 | case IWL_LEGACY_SWITCH_ANTENNA1: |
1393 | case IWL_LEGACY_SWITCH_ANTENNA2: | |
e1623446 | 1394 | IWL_DEBUG_RATE(priv, "LQ: Legacy toggle Antenna\n"); |
b481de9c | 1395 | |
c33104f0 | 1396 | lq_sta->action_counter++; |
77626355 | 1397 | |
3110bef7 GC |
1398 | if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 && |
1399 | tx_chains_num <= 1) || | |
1400 | (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 && | |
1401 | tx_chains_num <= 2)) | |
1402 | break; | |
1403 | ||
77626355 | 1404 | /* Don't change antenna if success has been great */ |
b481de9c ZY |
1405 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1406 | break; | |
77626355 | 1407 | |
77626355 | 1408 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1409 | memcpy(search_tbl, tbl, sz); |
1410 | ||
aade00ce GC |
1411 | if (rs_toggle_antenna(valid_tx_ant, |
1412 | &search_tbl->current_rate, search_tbl)) { | |
3110bef7 | 1413 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
aade00ce GC |
1414 | goto out; |
1415 | } | |
a5e8b505 | 1416 | break; |
b481de9c | 1417 | case IWL_LEGACY_SWITCH_SISO: |
e1623446 | 1418 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to SISO\n"); |
77626355 BC |
1419 | |
1420 | /* Set up search table to try SISO */ | |
b481de9c | 1421 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1422 | search_tbl->is_SGI = 0; |
c33104f0 | 1423 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1424 | search_tbl, index); |
dc2453ae | 1425 | if (!ret) { |
c33104f0 | 1426 | lq_sta->action_counter = 0; |
b481de9c | 1427 | goto out; |
dc2453ae | 1428 | } |
b481de9c ZY |
1429 | |
1430 | break; | |
3110bef7 GC |
1431 | case IWL_LEGACY_SWITCH_MIMO2_AB: |
1432 | case IWL_LEGACY_SWITCH_MIMO2_AC: | |
1433 | case IWL_LEGACY_SWITCH_MIMO2_BC: | |
e1623446 | 1434 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO2\n"); |
77626355 BC |
1435 | |
1436 | /* Set up search table to try MIMO */ | |
b481de9c | 1437 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1438 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1439 | |
1440 | if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AB) | |
1441 | search_tbl->ant_type = ANT_AB; | |
1442 | else if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AC) | |
1443 | search_tbl->ant_type = ANT_AC; | |
1444 | else | |
1445 | search_tbl->ant_type = ANT_BC; | |
1446 | ||
1447 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1448 | break; | |
1449 | ||
fde0db31 | 1450 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1451 | search_tbl, index); |
dc2453ae | 1452 | if (!ret) { |
c33104f0 | 1453 | lq_sta->action_counter = 0; |
b481de9c | 1454 | goto out; |
dc2453ae | 1455 | } |
b481de9c | 1456 | break; |
584a0f00 WYG |
1457 | |
1458 | case IWL_LEGACY_SWITCH_MIMO3_ABC: | |
1459 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO3\n"); | |
1460 | ||
1461 | /* Set up search table to try MIMO3 */ | |
1462 | memcpy(search_tbl, tbl, sz); | |
1463 | search_tbl->is_SGI = 0; | |
1464 | ||
1465 | search_tbl->ant_type = ANT_ABC; | |
1466 | ||
1467 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1468 | break; | |
1469 | ||
1470 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1471 | search_tbl, index); | |
1472 | if (!ret) { | |
1473 | lq_sta->action_counter = 0; | |
1474 | goto out; | |
1475 | } | |
1476 | break; | |
b481de9c ZY |
1477 | } |
1478 | tbl->action++; | |
584a0f00 | 1479 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1480 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; |
b481de9c ZY |
1481 | |
1482 | if (tbl->action == start_action) | |
1483 | break; | |
1484 | ||
1485 | } | |
3110bef7 | 1486 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1487 | return 0; |
1488 | ||
3110bef7 GC |
1489 | out: |
1490 | lq_sta->search_better_tbl = 1; | |
b481de9c | 1491 | tbl->action++; |
584a0f00 | 1492 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1493 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; |
b481de9c ZY |
1494 | return 0; |
1495 | ||
1496 | } | |
1497 | ||
77626355 BC |
1498 | /* |
1499 | * Try to switch to new modulation mode from SISO | |
1500 | */ | |
c79dd5b5 | 1501 | static int rs_move_siso_to_other(struct iwl_priv *priv, |
e227ceac | 1502 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1503 | struct ieee80211_conf *conf, |
4b7679a5 | 1504 | struct ieee80211_sta *sta, int index) |
b481de9c | 1505 | { |
c33104f0 | 1506 | u8 is_green = lq_sta->is_green; |
e227ceac TW |
1507 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1508 | struct iwl_scale_tbl_info *search_tbl = | |
1509 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1510 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1511 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1512 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1513 | u8 start_action = tbl->action; |
fde0db31 | 1514 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1515 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
fde0db31 | 1516 | int ret; |
b481de9c ZY |
1517 | |
1518 | for (;;) { | |
c33104f0 | 1519 | lq_sta->action_counter++; |
b481de9c | 1520 | switch (tbl->action) { |
3110bef7 GC |
1521 | case IWL_SISO_SWITCH_ANTENNA1: |
1522 | case IWL_SISO_SWITCH_ANTENNA2: | |
e1623446 | 1523 | IWL_DEBUG_RATE(priv, "LQ: SISO toggle Antenna\n"); |
3110bef7 GC |
1524 | |
1525 | if ((tbl->action == IWL_SISO_SWITCH_ANTENNA1 && | |
1526 | tx_chains_num <= 1) || | |
1527 | (tbl->action == IWL_SISO_SWITCH_ANTENNA2 && | |
1528 | tx_chains_num <= 2)) | |
1529 | break; | |
1530 | ||
b481de9c ZY |
1531 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1532 | break; | |
b481de9c ZY |
1533 | |
1534 | memcpy(search_tbl, tbl, sz); | |
aade00ce | 1535 | if (rs_toggle_antenna(valid_tx_ant, |
3110bef7 | 1536 | &search_tbl->current_rate, search_tbl)) |
aade00ce | 1537 | goto out; |
a5e8b505 | 1538 | break; |
3110bef7 GC |
1539 | case IWL_SISO_SWITCH_MIMO2_AB: |
1540 | case IWL_SISO_SWITCH_MIMO2_AC: | |
1541 | case IWL_SISO_SWITCH_MIMO2_BC: | |
e1623446 | 1542 | IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO2\n"); |
b481de9c | 1543 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1544 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1545 | |
1546 | if (tbl->action == IWL_SISO_SWITCH_MIMO2_AB) | |
1547 | search_tbl->ant_type = ANT_AB; | |
1548 | else if (tbl->action == IWL_SISO_SWITCH_MIMO2_AC) | |
1549 | search_tbl->ant_type = ANT_AC; | |
1550 | else | |
1551 | search_tbl->ant_type = ANT_BC; | |
1552 | ||
1553 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1554 | break; | |
1555 | ||
fde0db31 | 1556 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1557 | search_tbl, index); |
3110bef7 | 1558 | if (!ret) |
b481de9c ZY |
1559 | goto out; |
1560 | break; | |
1561 | case IWL_SISO_SWITCH_GI: | |
a9841013 EG |
1562 | if (!tbl->is_fat && |
1563 | !(priv->current_ht_config.sgf & | |
1564 | HT_SHORT_GI_20MHZ)) | |
1565 | break; | |
1566 | if (tbl->is_fat && | |
1567 | !(priv->current_ht_config.sgf & | |
1568 | HT_SHORT_GI_40MHZ)) | |
1569 | break; | |
1570 | ||
e1623446 | 1571 | IWL_DEBUG_RATE(priv, "LQ: SISO toggle SGI/NGI\n"); |
0c11b4de | 1572 | |
b481de9c | 1573 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1574 | if (is_green) { |
1575 | if (!tbl->is_SGI) | |
1576 | break; | |
1577 | else | |
15b1687c WT |
1578 | IWL_ERR(priv, |
1579 | "SGI was set in GF+SISO\n"); | |
b481de9c | 1580 | } |
39e88504 | 1581 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1582 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
39e88504 GC |
1583 | if (tbl->is_SGI) { |
1584 | s32 tpt = lq_sta->last_tpt / 100; | |
1585 | if (tpt >= search_tbl->expected_tpt[index]) | |
1586 | break; | |
1587 | } | |
978785a3 TW |
1588 | search_tbl->current_rate = |
1589 | rate_n_flags_from_tbl(priv, search_tbl, | |
1590 | index, is_green); | |
b481de9c | 1591 | goto out; |
584a0f00 WYG |
1592 | case IWL_SISO_SWITCH_MIMO3_ABC: |
1593 | IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO3\n"); | |
1594 | memcpy(search_tbl, tbl, sz); | |
1595 | search_tbl->is_SGI = 0; | |
1596 | search_tbl->ant_type = ANT_ABC; | |
1597 | ||
1598 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1599 | break; | |
1600 | ||
1601 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1602 | search_tbl, index); | |
1603 | if (!ret) | |
1604 | goto out; | |
1605 | break; | |
b481de9c ZY |
1606 | } |
1607 | tbl->action++; | |
584a0f00 | 1608 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1609 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1610 | |
1611 | if (tbl->action == start_action) | |
1612 | break; | |
1613 | } | |
3110bef7 | 1614 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1615 | return 0; |
1616 | ||
1617 | out: | |
3110bef7 | 1618 | lq_sta->search_better_tbl = 1; |
b481de9c | 1619 | tbl->action++; |
584a0f00 | 1620 | if (tbl->action > IWL_SISO_SWITCH_MIMO3_ABC) |
3110bef7 | 1621 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1622 | return 0; |
1623 | } | |
1624 | ||
77626355 | 1625 | /* |
584a0f00 | 1626 | * Try to switch to new modulation mode from MIMO2 |
77626355 | 1627 | */ |
584a0f00 | 1628 | static int rs_move_mimo2_to_other(struct iwl_priv *priv, |
e227ceac | 1629 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1630 | struct ieee80211_conf *conf, |
4b7679a5 | 1631 | struct ieee80211_sta *sta, int index) |
b481de9c | 1632 | { |
c33104f0 | 1633 | s8 is_green = lq_sta->is_green; |
e227ceac TW |
1634 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1635 | struct iwl_scale_tbl_info *search_tbl = | |
1636 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
3110bef7 | 1637 | struct iwl_rate_scale_data *window = &(tbl->win[index]); |
e227ceac TW |
1638 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1639 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1640 | u8 start_action = tbl->action; |
3110bef7 GC |
1641 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1642 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
aade00ce | 1643 | int ret; |
b481de9c ZY |
1644 | |
1645 | for (;;) { | |
c33104f0 | 1646 | lq_sta->action_counter++; |
b481de9c | 1647 | switch (tbl->action) { |
3110bef7 GC |
1648 | case IWL_MIMO2_SWITCH_ANTENNA1: |
1649 | case IWL_MIMO2_SWITCH_ANTENNA2: | |
584a0f00 | 1650 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle Antennas\n"); |
3110bef7 GC |
1651 | |
1652 | if (tx_chains_num <= 2) | |
1653 | break; | |
1654 | ||
1655 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1656 | break; | |
1657 | ||
1658 | memcpy(search_tbl, tbl, sz); | |
1659 | if (rs_toggle_antenna(valid_tx_ant, | |
1660 | &search_tbl->current_rate, search_tbl)) | |
1661 | goto out; | |
1662 | break; | |
1663 | case IWL_MIMO2_SWITCH_SISO_A: | |
1664 | case IWL_MIMO2_SWITCH_SISO_B: | |
1665 | case IWL_MIMO2_SWITCH_SISO_C: | |
e1623446 | 1666 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to SISO\n"); |
0c11b4de | 1667 | |
77626355 | 1668 | /* Set up new search table for SISO */ |
b481de9c | 1669 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1670 | |
3110bef7 | 1671 | if (tbl->action == IWL_MIMO2_SWITCH_SISO_A) |
fde0db31 | 1672 | search_tbl->ant_type = ANT_A; |
3110bef7 | 1673 | else if (tbl->action == IWL_MIMO2_SWITCH_SISO_B) |
fde0db31 | 1674 | search_tbl->ant_type = ANT_B; |
3110bef7 GC |
1675 | else |
1676 | search_tbl->ant_type = ANT_C; | |
1677 | ||
1678 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1679 | break; | |
b481de9c | 1680 | |
c33104f0 | 1681 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1682 | search_tbl, index); |
3110bef7 | 1683 | if (!ret) |
b481de9c | 1684 | goto out; |
3110bef7 | 1685 | |
b481de9c ZY |
1686 | break; |
1687 | ||
3110bef7 | 1688 | case IWL_MIMO2_SWITCH_GI: |
a9841013 EG |
1689 | if (!tbl->is_fat && |
1690 | !(priv->current_ht_config.sgf & | |
1691 | HT_SHORT_GI_20MHZ)) | |
1692 | break; | |
1693 | if (tbl->is_fat && | |
1694 | !(priv->current_ht_config.sgf & | |
1695 | HT_SHORT_GI_40MHZ)) | |
1696 | break; | |
1697 | ||
584a0f00 | 1698 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle SGI/NGI\n"); |
77626355 | 1699 | |
584a0f00 | 1700 | /* Set up new search table for MIMO2 */ |
b481de9c | 1701 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1702 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1703 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
77626355 BC |
1704 | /* |
1705 | * If active table already uses the fastest possible | |
1706 | * modulation (dual stream with short guard interval), | |
1707 | * and it's working well, there's no need to look | |
1708 | * for a better type of modulation! | |
1709 | */ | |
39e88504 | 1710 | if (tbl->is_SGI) { |
c33104f0 | 1711 | s32 tpt = lq_sta->last_tpt / 100; |
39e88504 GC |
1712 | if (tpt >= search_tbl->expected_tpt[index]) |
1713 | break; | |
b481de9c | 1714 | } |
978785a3 TW |
1715 | search_tbl->current_rate = |
1716 | rate_n_flags_from_tbl(priv, search_tbl, | |
1717 | index, is_green); | |
b481de9c ZY |
1718 | goto out; |
1719 | ||
584a0f00 WYG |
1720 | case IWL_MIMO2_SWITCH_MIMO3_ABC: |
1721 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to MIMO3\n"); | |
1722 | memcpy(search_tbl, tbl, sz); | |
1723 | search_tbl->is_SGI = 0; | |
1724 | search_tbl->ant_type = ANT_ABC; | |
1725 | ||
1726 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1727 | break; | |
1728 | ||
1729 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1730 | search_tbl, index); | |
1731 | if (!ret) | |
1732 | goto out; | |
1733 | ||
1734 | break; | |
b481de9c ZY |
1735 | } |
1736 | tbl->action++; | |
584a0f00 | 1737 | if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC) |
3110bef7 | 1738 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; |
b481de9c ZY |
1739 | |
1740 | if (tbl->action == start_action) | |
1741 | break; | |
1742 | } | |
3110bef7 | 1743 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1744 | return 0; |
1745 | out: | |
3110bef7 | 1746 | lq_sta->search_better_tbl = 1; |
b481de9c | 1747 | tbl->action++; |
584a0f00 | 1748 | if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC) |
3110bef7 | 1749 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; |
b481de9c ZY |
1750 | return 0; |
1751 | ||
1752 | } | |
1753 | ||
584a0f00 WYG |
1754 | /* |
1755 | * Try to switch to new modulation mode from MIMO3 | |
1756 | */ | |
1757 | static int rs_move_mimo3_to_other(struct iwl_priv *priv, | |
1758 | struct iwl_lq_sta *lq_sta, | |
1759 | struct ieee80211_conf *conf, | |
1760 | struct ieee80211_sta *sta, int index) | |
1761 | { | |
1762 | s8 is_green = lq_sta->is_green; | |
1763 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1764 | struct iwl_scale_tbl_info *search_tbl = | |
1765 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1766 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1767 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1768 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1769 | u8 start_action = tbl->action; | |
1770 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; | |
1771 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
1772 | int ret; | |
1773 | ||
1774 | for (;;) { | |
1775 | lq_sta->action_counter++; | |
1776 | switch (tbl->action) { | |
1777 | case IWL_MIMO3_SWITCH_ANTENNA1: | |
1778 | case IWL_MIMO3_SWITCH_ANTENNA2: | |
1779 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle Antennas\n"); | |
1780 | ||
1781 | if (tx_chains_num <= 3) | |
1782 | break; | |
1783 | ||
1784 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1785 | break; | |
1786 | ||
1787 | memcpy(search_tbl, tbl, sz); | |
1788 | if (rs_toggle_antenna(valid_tx_ant, | |
1789 | &search_tbl->current_rate, search_tbl)) | |
1790 | goto out; | |
1791 | break; | |
1792 | case IWL_MIMO3_SWITCH_SISO_A: | |
1793 | case IWL_MIMO3_SWITCH_SISO_B: | |
1794 | case IWL_MIMO3_SWITCH_SISO_C: | |
1795 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to SISO\n"); | |
1796 | ||
1797 | /* Set up new search table for SISO */ | |
1798 | memcpy(search_tbl, tbl, sz); | |
1799 | ||
1800 | if (tbl->action == IWL_MIMO3_SWITCH_SISO_A) | |
1801 | search_tbl->ant_type = ANT_A; | |
1802 | else if (tbl->action == IWL_MIMO3_SWITCH_SISO_B) | |
1803 | search_tbl->ant_type = ANT_B; | |
1804 | else | |
1805 | search_tbl->ant_type = ANT_C; | |
1806 | ||
1807 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1808 | break; | |
1809 | ||
1810 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, | |
1811 | search_tbl, index); | |
1812 | if (!ret) | |
1813 | goto out; | |
1814 | ||
1815 | break; | |
1816 | ||
1817 | case IWL_MIMO3_SWITCH_MIMO2_AB: | |
1818 | case IWL_MIMO3_SWITCH_MIMO2_AC: | |
1819 | case IWL_MIMO3_SWITCH_MIMO2_BC: | |
1820 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to MIMO2\n"); | |
1821 | ||
1822 | memcpy(search_tbl, tbl, sz); | |
1823 | search_tbl->is_SGI = 0; | |
1824 | if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AB) | |
1825 | search_tbl->ant_type = ANT_AB; | |
1826 | else if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AC) | |
1827 | search_tbl->ant_type = ANT_AC; | |
1828 | else | |
1829 | search_tbl->ant_type = ANT_BC; | |
1830 | ||
1831 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1832 | break; | |
1833 | ||
1834 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, | |
1835 | search_tbl, index); | |
1836 | if (!ret) | |
1837 | goto out; | |
1838 | ||
1839 | break; | |
1840 | ||
1841 | case IWL_MIMO3_SWITCH_GI: | |
1842 | if (!tbl->is_fat && | |
1843 | !(priv->current_ht_config.sgf & | |
1844 | HT_SHORT_GI_20MHZ)) | |
1845 | break; | |
1846 | if (tbl->is_fat && | |
1847 | !(priv->current_ht_config.sgf & | |
1848 | HT_SHORT_GI_40MHZ)) | |
1849 | break; | |
1850 | ||
1851 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle SGI/NGI\n"); | |
1852 | ||
1853 | /* Set up new search table for MIMO */ | |
1854 | memcpy(search_tbl, tbl, sz); | |
1855 | search_tbl->is_SGI = !tbl->is_SGI; | |
1856 | rs_set_expected_tpt_table(lq_sta, search_tbl); | |
1857 | /* | |
1858 | * If active table already uses the fastest possible | |
1859 | * modulation (dual stream with short guard interval), | |
1860 | * and it's working well, there's no need to look | |
1861 | * for a better type of modulation! | |
1862 | */ | |
1863 | if (tbl->is_SGI) { | |
1864 | s32 tpt = lq_sta->last_tpt / 100; | |
1865 | if (tpt >= search_tbl->expected_tpt[index]) | |
1866 | break; | |
1867 | } | |
1868 | search_tbl->current_rate = | |
1869 | rate_n_flags_from_tbl(priv, search_tbl, | |
1870 | index, is_green); | |
1871 | goto out; | |
1872 | } | |
1873 | tbl->action++; | |
1874 | if (tbl->action > IWL_MIMO3_SWITCH_GI) | |
1875 | tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; | |
1876 | ||
1877 | if (tbl->action == start_action) | |
1878 | break; | |
1879 | } | |
1880 | search_tbl->lq_type = LQ_NONE; | |
1881 | return 0; | |
1882 | out: | |
1883 | lq_sta->search_better_tbl = 1; | |
1884 | tbl->action++; | |
1885 | if (tbl->action > IWL_MIMO3_SWITCH_GI) | |
1886 | tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; | |
1887 | return 0; | |
1888 | ||
1889 | } | |
1890 | ||
77626355 BC |
1891 | /* |
1892 | * Check whether we should continue using same modulation mode, or | |
1893 | * begin search for a new mode, based on: | |
1894 | * 1) # tx successes or failures while using this mode | |
1895 | * 2) # times calling this function | |
1896 | * 3) elapsed time in this mode (not used, for now) | |
1897 | */ | |
e227ceac | 1898 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta) |
b481de9c | 1899 | { |
e227ceac | 1900 | struct iwl_scale_tbl_info *tbl; |
b481de9c ZY |
1901 | int i; |
1902 | int active_tbl; | |
1903 | int flush_interval_passed = 0; | |
bf403db8 | 1904 | struct iwl_priv *priv; |
b481de9c | 1905 | |
bf403db8 | 1906 | priv = lq_sta->drv; |
c33104f0 | 1907 | active_tbl = lq_sta->active_tbl; |
b481de9c | 1908 | |
c33104f0 | 1909 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 1910 | |
77626355 | 1911 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 1912 | if (lq_sta->stay_in_tbl) { |
b481de9c | 1913 | |
77626355 | 1914 | /* Elapsed time using current modulation mode */ |
c33104f0 | 1915 | if (lq_sta->flush_timer) |
b481de9c ZY |
1916 | flush_interval_passed = |
1917 | time_after(jiffies, | |
c33104f0 | 1918 | (unsigned long)(lq_sta->flush_timer + |
b481de9c ZY |
1919 | IWL_RATE_SCALE_FLUSH_INTVL)); |
1920 | ||
77626355 BC |
1921 | /* |
1922 | * Check if we should allow search for new modulation mode. | |
1923 | * If many frames have failed or succeeded, or we've used | |
1924 | * this same modulation for a long time, allow search, and | |
1925 | * reset history stats that keep track of whether we should | |
1926 | * allow a new search. Also (below) reset all bitmaps and | |
1927 | * stats in active history. | |
1928 | */ | |
c33104f0 TW |
1929 | if ((lq_sta->total_failed > lq_sta->max_failure_limit) || |
1930 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1931 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c | 1932 | && (flush_interval_passed))) { |
e1623446 | 1933 | IWL_DEBUG_RATE(priv, "LQ: stay is expired %d %d %d\n:", |
c33104f0 TW |
1934 | lq_sta->total_failed, |
1935 | lq_sta->total_success, | |
b481de9c | 1936 | flush_interval_passed); |
77626355 BC |
1937 | |
1938 | /* Allow search for new mode */ | |
c33104f0 TW |
1939 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
1940 | lq_sta->total_failed = 0; | |
1941 | lq_sta->total_success = 0; | |
1942 | lq_sta->flush_timer = 0; | |
77626355 BC |
1943 | |
1944 | /* | |
1945 | * Else if we've used this modulation mode enough repetitions | |
1946 | * (regardless of elapsed time or success/failure), reset | |
1947 | * history bitmaps and rate-specific stats for all rates in | |
1948 | * active table. | |
1949 | */ | |
403ab56b | 1950 | } else { |
c33104f0 TW |
1951 | lq_sta->table_count++; |
1952 | if (lq_sta->table_count >= | |
1953 | lq_sta->table_count_limit) { | |
1954 | lq_sta->table_count = 0; | |
b481de9c | 1955 | |
e1623446 | 1956 | IWL_DEBUG_RATE(priv, "LQ: stay in table clear win\n"); |
b481de9c ZY |
1957 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1958 | rs_rate_scale_clear_window( | |
1959 | &(tbl->win[i])); | |
1960 | } | |
1961 | } | |
1962 | ||
77626355 BC |
1963 | /* If transitioning to allow "search", reset all history |
1964 | * bitmaps and stats in active table (this will become the new | |
1965 | * "search" table). */ | |
c33104f0 | 1966 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
1967 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1968 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1969 | } | |
1970 | } | |
1971 | } | |
1972 | ||
77626355 BC |
1973 | /* |
1974 | * Do rate scaling and search for new modulation mode. | |
1975 | */ | |
c79dd5b5 | 1976 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c | 1977 | struct ieee80211_hdr *hdr, |
4b7679a5 JB |
1978 | struct ieee80211_sta *sta, |
1979 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 1980 | { |
4b7679a5 | 1981 | struct ieee80211_hw *hw = priv->hw; |
270243a5 | 1982 | struct ieee80211_conf *conf = &hw->conf; |
b481de9c ZY |
1983 | int low = IWL_RATE_INVALID; |
1984 | int high = IWL_RATE_INVALID; | |
1985 | int index; | |
1986 | int i; | |
e227ceac | 1987 | struct iwl_rate_scale_data *window = NULL; |
b481de9c ZY |
1988 | int current_tpt = IWL_INVALID_VALUE; |
1989 | int low_tpt = IWL_INVALID_VALUE; | |
1990 | int high_tpt = IWL_INVALID_VALUE; | |
1991 | u32 fail_count; | |
1992 | s8 scale_action = 0; | |
fd7c8a40 | 1993 | u16 rate_mask; |
b481de9c | 1994 | u8 update_lq = 0; |
e227ceac | 1995 | struct iwl_scale_tbl_info *tbl, *tbl1; |
b481de9c | 1996 | u16 rate_scale_index_msk = 0; |
39e88504 | 1997 | u32 rate; |
b481de9c ZY |
1998 | u8 is_green = 0; |
1999 | u8 active_tbl = 0; | |
2000 | u8 done_search = 0; | |
2001 | u16 high_low; | |
a5e8b505 | 2002 | s32 sr; |
0c11b4de | 2003 | u8 tid = MAX_TID_COUNT; |
86b4766b | 2004 | struct iwl_tid_data *tid_data; |
b481de9c | 2005 | |
e1623446 | 2006 | IWL_DEBUG_RATE(priv, "rate scale calculate new rate for skb\n"); |
b481de9c | 2007 | |
417f114b TW |
2008 | /* Send management frames and broadcast/multicast data using |
2009 | * lowest rate. */ | |
2010 | /* TODO: this could probably be improved.. */ | |
2011 | if (!ieee80211_is_data(hdr->frame_control) || | |
2012 | is_multicast_ether_addr(hdr->addr1)) | |
b481de9c | 2013 | return; |
b481de9c | 2014 | |
4b7679a5 | 2015 | if (!sta || !lq_sta) |
b481de9c ZY |
2016 | return; |
2017 | ||
4b7679a5 | 2018 | lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; |
b481de9c | 2019 | |
faa29718 RR |
2020 | tid = rs_tl_add_packet(lq_sta, hdr); |
2021 | ||
77626355 BC |
2022 | /* |
2023 | * Select rate-scale / modulation-mode table to work with in | |
2024 | * the rest of this function: "search" if searching for better | |
2025 | * modulation mode, or "active" if doing rate scaling within a mode. | |
2026 | */ | |
c33104f0 TW |
2027 | if (!lq_sta->search_better_tbl) |
2028 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2029 | else |
c33104f0 | 2030 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2031 | |
c33104f0 TW |
2032 | tbl = &(lq_sta->lq_info[active_tbl]); |
2033 | is_green = lq_sta->is_green; | |
b481de9c | 2034 | |
77626355 | 2035 | /* current tx rate */ |
b7e35008 | 2036 | index = lq_sta->last_txrate_idx; |
b481de9c | 2037 | |
e1623446 | 2038 | IWL_DEBUG_RATE(priv, "Rate scale index %d for type %d\n", index, |
b481de9c ZY |
2039 | tbl->lq_type); |
2040 | ||
77626355 | 2041 | /* rates available for this association, and for modulation mode */ |
eecd6e57 | 2042 | rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
b481de9c | 2043 | |
e1623446 | 2044 | IWL_DEBUG_RATE(priv, "mask 0x%04X \n", rate_mask); |
b481de9c ZY |
2045 | |
2046 | /* mask with station rate restriction */ | |
2047 | if (is_legacy(tbl->lq_type)) { | |
8318d78a | 2048 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
77626355 | 2049 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 2050 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 2051 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
2052 | else |
2053 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 2054 | lq_sta->supp_rates); |
b481de9c ZY |
2055 | |
2056 | } else | |
2057 | rate_scale_index_msk = rate_mask; | |
2058 | ||
2059 | if (!rate_scale_index_msk) | |
2060 | rate_scale_index_msk = rate_mask; | |
2061 | ||
07bc28ed | 2062 | if (!((1 << index) & rate_scale_index_msk)) { |
15b1687c | 2063 | IWL_ERR(priv, "Current Rate is not valid\n"); |
07bc28ed | 2064 | return; |
b481de9c ZY |
2065 | } |
2066 | ||
77626355 | 2067 | /* Get expected throughput table and history window for current rate */ |
07bc28ed | 2068 | if (!tbl->expected_tpt) { |
15b1687c | 2069 | IWL_ERR(priv, "tbl->expected_tpt is NULL\n"); |
07bc28ed GC |
2070 | return; |
2071 | } | |
b481de9c | 2072 | |
c6ec7a9b AM |
2073 | /* force user max rate if set by user */ |
2074 | if ((lq_sta->max_rate_idx != -1) && | |
2075 | (lq_sta->max_rate_idx < index)) { | |
2076 | index = lq_sta->max_rate_idx; | |
2077 | update_lq = 1; | |
2078 | window = &(tbl->win[index]); | |
2079 | goto lq_update; | |
2080 | } | |
2081 | ||
b481de9c ZY |
2082 | window = &(tbl->win[index]); |
2083 | ||
77626355 BC |
2084 | /* |
2085 | * If there is not enough history to calculate actual average | |
2086 | * throughput, keep analyzing results of more tx frames, without | |
2087 | * changing rate or mode (bypass most of the rest of this function). | |
2088 | * Set up new rate table in uCode only if old rate is not supported | |
2089 | * in current association (use new rate found above). | |
2090 | */ | |
b481de9c | 2091 | fail_count = window->counter - window->success_counter; |
07bc28ed GC |
2092 | if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
2093 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { | |
e1623446 | 2094 | IWL_DEBUG_RATE(priv, "LQ: still below TH. succ=%d total=%d " |
b481de9c ZY |
2095 | "for index %d\n", |
2096 | window->success_counter, window->counter, index); | |
77626355 BC |
2097 | |
2098 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 2099 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
2100 | |
2101 | /* Should we stay with this modulation mode, | |
2102 | * or search for a new one? */ | |
c33104f0 | 2103 | rs_stay_in_table(lq_sta); |
77626355 | 2104 | |
b481de9c | 2105 | goto out; |
3110bef7 | 2106 | } |
b481de9c | 2107 | |
77626355 BC |
2108 | /* Else we have enough samples; calculate estimate of |
2109 | * actual average throughput */ | |
3110bef7 GC |
2110 | |
2111 | BUG_ON(window->average_tpt != ((window->success_ratio * | |
2112 | tbl->expected_tpt[index] + 64) / 128)); | |
b481de9c | 2113 | |
77626355 | 2114 | /* If we are searching for better modulation mode, check success. */ |
c33104f0 | 2115 | if (lq_sta->search_better_tbl) { |
b481de9c | 2116 | |
77626355 BC |
2117 | /* If good success, continue using the "search" mode; |
2118 | * no need to send new link quality command, since we're | |
2119 | * continuing to use the setup that we've been trying. */ | |
07bc28ed GC |
2120 | if (window->average_tpt > lq_sta->last_tpt) { |
2121 | ||
e1623446 | 2122 | IWL_DEBUG_RATE(priv, "LQ: SWITCHING TO NEW TABLE " |
07bc28ed GC |
2123 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
2124 | window->success_ratio, | |
2125 | window->average_tpt, | |
2126 | lq_sta->last_tpt); | |
2127 | ||
2128 | if (!is_legacy(tbl->lq_type)) | |
c33104f0 | 2129 | lq_sta->enable_counter = 1; |
07bc28ed | 2130 | |
77626355 | 2131 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 2132 | lq_sta->active_tbl = active_tbl; |
b481de9c | 2133 | current_tpt = window->average_tpt; |
77626355 BC |
2134 | |
2135 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 2136 | } else { |
07bc28ed | 2137 | |
e1623446 | 2138 | IWL_DEBUG_RATE(priv, "LQ: GOING BACK TO THE OLD TABLE " |
07bc28ed GC |
2139 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
2140 | window->success_ratio, | |
2141 | window->average_tpt, | |
2142 | lq_sta->last_tpt); | |
2143 | ||
77626355 | 2144 | /* Nullify "search" table */ |
b481de9c | 2145 | tbl->lq_type = LQ_NONE; |
77626355 BC |
2146 | |
2147 | /* Revert to "active" table */ | |
c33104f0 TW |
2148 | active_tbl = lq_sta->active_tbl; |
2149 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 2150 | |
77626355 | 2151 | /* Revert to "active" rate and throughput info */ |
e7d326ac | 2152 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
c33104f0 | 2153 | current_tpt = lq_sta->last_tpt; |
b481de9c | 2154 | |
77626355 | 2155 | /* Need to set up a new rate table in uCode */ |
b481de9c | 2156 | update_lq = 1; |
b481de9c | 2157 | } |
77626355 BC |
2158 | |
2159 | /* Either way, we've made a decision; modulation mode | |
2160 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 2161 | lq_sta->search_better_tbl = 0; |
77626355 | 2162 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
2163 | goto lq_update; |
2164 | } | |
2165 | ||
77626355 BC |
2166 | /* (Else) not in search of better modulation mode, try for better |
2167 | * starting rate, while staying in this mode. */ | |
bf403db8 | 2168 | high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk, |
b481de9c ZY |
2169 | tbl->lq_type); |
2170 | low = high_low & 0xff; | |
2171 | high = (high_low >> 8) & 0xff; | |
2172 | ||
c6ec7a9b AM |
2173 | /* If user set max rate, dont allow higher than user constrain */ |
2174 | if ((lq_sta->max_rate_idx != -1) && | |
2175 | (lq_sta->max_rate_idx < high)) | |
2176 | high = IWL_RATE_INVALID; | |
2177 | ||
a5e8b505 GC |
2178 | sr = window->success_ratio; |
2179 | ||
77626355 | 2180 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 2181 | current_tpt = window->average_tpt; |
b481de9c ZY |
2182 | if (low != IWL_RATE_INVALID) |
2183 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
2184 | if (high != IWL_RATE_INVALID) |
2185 | high_tpt = tbl->win[high].average_tpt; | |
2186 | ||
a5e8b505 | 2187 | scale_action = 0; |
b481de9c | 2188 | |
77626355 | 2189 | /* Too many failures, decrease rate */ |
a5e8b505 | 2190 | if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) { |
e1623446 | 2191 | IWL_DEBUG_RATE(priv, "decrease rate because of low success_ratio\n"); |
b481de9c | 2192 | scale_action = -1; |
77626355 BC |
2193 | |
2194 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c | 2195 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
a5e8b505 GC |
2196 | (high_tpt == IWL_INVALID_VALUE)) { |
2197 | ||
2198 | if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH) | |
2199 | scale_action = 1; | |
2200 | else if (low != IWL_RATE_INVALID) | |
8fe72311 | 2201 | scale_action = 0; |
a5e8b505 | 2202 | } |
77626355 BC |
2203 | |
2204 | /* Both adjacent throughputs are measured, but neither one has better | |
2205 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
2206 | else if ((low_tpt != IWL_INVALID_VALUE) && |
2207 | (high_tpt != IWL_INVALID_VALUE) && | |
2208 | (low_tpt < current_tpt) && | |
2209 | (high_tpt < current_tpt)) | |
2210 | scale_action = 0; | |
77626355 BC |
2211 | |
2212 | /* At least one adjacent rate's throughput is measured, | |
2213 | * and may have better performance. */ | |
b481de9c | 2214 | else { |
77626355 | 2215 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 2216 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 2217 | /* Higher rate has better throughput */ |
a5e8b505 GC |
2218 | if (high_tpt > current_tpt && |
2219 | sr >= IWL_RATE_INCREASE_TH) { | |
b481de9c | 2220 | scale_action = 1; |
a5e8b505 | 2221 | } else { |
8fe72311 | 2222 | scale_action = 0; |
b481de9c | 2223 | } |
77626355 BC |
2224 | |
2225 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 2226 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 2227 | /* Lower rate has better throughput */ |
b481de9c | 2228 | if (low_tpt > current_tpt) { |
e1623446 TW |
2229 | IWL_DEBUG_RATE(priv, |
2230 | "decrease rate because of low tpt\n"); | |
b481de9c | 2231 | scale_action = -1; |
a5e8b505 | 2232 | } else if (sr >= IWL_RATE_INCREASE_TH) { |
b481de9c | 2233 | scale_action = 1; |
a5e8b505 | 2234 | } |
b481de9c ZY |
2235 | } |
2236 | } | |
2237 | ||
77626355 BC |
2238 | /* Sanity check; asked for decrease, but success rate or throughput |
2239 | * has been good at old rate. Don't change it. */ | |
a5e8b505 GC |
2240 | if ((scale_action == -1) && (low != IWL_RATE_INVALID) && |
2241 | ((sr > IWL_RATE_HIGH_TH) || | |
b481de9c | 2242 | (current_tpt > (100 * tbl->expected_tpt[low])))) |
b481de9c ZY |
2243 | scale_action = 0; |
2244 | ||
2245 | switch (scale_action) { | |
2246 | case -1: | |
77626355 | 2247 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
2248 | if (low != IWL_RATE_INVALID) { |
2249 | update_lq = 1; | |
2250 | index = low; | |
2251 | } | |
2252 | break; | |
2253 | case 1: | |
77626355 | 2254 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
2255 | if (high != IWL_RATE_INVALID) { |
2256 | update_lq = 1; | |
2257 | index = high; | |
2258 | } | |
2259 | ||
2260 | break; | |
2261 | case 0: | |
77626355 | 2262 | /* No change */ |
b481de9c ZY |
2263 | default: |
2264 | break; | |
2265 | } | |
2266 | ||
e1623446 | 2267 | IWL_DEBUG_RATE(priv, "choose rate scale index %d action %d low %d " |
b481de9c ZY |
2268 | "high %d type %d\n", |
2269 | index, scale_action, low, high, tbl->lq_type); | |
2270 | ||
a5e8b505 | 2271 | lq_update: |
77626355 | 2272 | /* Replace uCode's rate table for the destination station. */ |
b481de9c | 2273 | if (update_lq) { |
978785a3 | 2274 | rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); |
07bc28ed | 2275 | rs_fill_link_cmd(priv, lq_sta, rate); |
66c73db7 | 2276 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 2277 | } |
77626355 BC |
2278 | |
2279 | /* Should we stay with this modulation mode, or search for a new one? */ | |
c33104f0 | 2280 | rs_stay_in_table(lq_sta); |
b481de9c | 2281 | |
77626355 BC |
2282 | /* |
2283 | * Search for new modulation mode if we're: | |
2284 | * 1) Not changing rates right now | |
2285 | * 2) Not just finishing up a search | |
2286 | * 3) Allowing a new search | |
2287 | */ | |
47cfd463 | 2288 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) { |
77626355 | 2289 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 2290 | lq_sta->last_tpt = current_tpt; |
b481de9c | 2291 | |
77626355 BC |
2292 | /* Select a new "search" modulation mode to try. |
2293 | * If one is found, set up the new "search" table. */ | |
b481de9c | 2294 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 2295 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2296 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 2297 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
584a0f00 WYG |
2298 | else if (is_mimo2(tbl->lq_type)) |
2299 | rs_move_mimo2_to_other(priv, lq_sta, conf, sta, index); | |
b481de9c | 2300 | else |
584a0f00 | 2301 | rs_move_mimo3_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2302 | |
77626355 | 2303 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 2304 | if (lq_sta->search_better_tbl) { |
77626355 | 2305 | /* Access the "search" table, clear its history. */ |
c33104f0 | 2306 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
2307 | for (i = 0; i < IWL_RATE_COUNT; i++) |
2308 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
2309 | ||
77626355 | 2310 | /* Use new "search" start rate */ |
e7d326ac | 2311 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
b481de9c | 2312 | |
e1623446 | 2313 | IWL_DEBUG_RATE(priv, "Switch current mcs: %X index: %d\n", |
39e88504 | 2314 | tbl->current_rate, index); |
07bc28ed | 2315 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
66c73db7 | 2316 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 2317 | } |
b481de9c | 2318 | |
77626355 BC |
2319 | /* If the "active" (non-search) mode was legacy, |
2320 | * and we've tried switching antennas, | |
2321 | * but we haven't been able to try HT modes (not available), | |
2322 | * stay with best antenna legacy modulation for a while | |
2323 | * before next round of mode comparisons. */ | |
c33104f0 | 2324 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
de27e64e | 2325 | if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) && |
ae5eb026 | 2326 | lq_sta->action_counter >= 1) { |
c33104f0 | 2327 | lq_sta->action_counter = 0; |
e1623446 | 2328 | IWL_DEBUG_RATE(priv, "LQ: STAY in legacy table\n"); |
bf403db8 | 2329 | rs_set_stay_in_table(priv, 1, lq_sta); |
b481de9c ZY |
2330 | } |
2331 | ||
77626355 BC |
2332 | /* If we're in an HT mode, and all 3 mode switch actions |
2333 | * have been tried and compared, stay in this best modulation | |
2334 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 TW |
2335 | if (lq_sta->enable_counter && |
2336 | (lq_sta->action_counter >= IWL_ACTION_LIMIT)) { | |
0c11b4de RR |
2337 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
2338 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2339 | (tid != MAX_TID_COUNT)) { | |
86b4766b WYG |
2340 | tid_data = |
2341 | &priv->stations[lq_sta->lq.sta_id].tid[tid]; | |
2342 | if (tid_data->agg.state == IWL_AGG_OFF) { | |
2343 | IWL_DEBUG_RATE(priv, | |
2344 | "try to aggregate tid %d\n", | |
2345 | tid); | |
2346 | rs_tl_turn_on_agg(priv, tid, | |
2347 | lq_sta, sta); | |
2348 | } | |
b481de9c | 2349 | } |
c33104f0 | 2350 | lq_sta->action_counter = 0; |
bf403db8 | 2351 | rs_set_stay_in_table(priv, 0, lq_sta); |
b481de9c | 2352 | } |
77626355 BC |
2353 | |
2354 | /* | |
2355 | * Else, don't search for a new modulation mode. | |
2356 | * Put new timestamp in stay-in-modulation-mode flush timer if: | |
2357 | * 1) Not changing rates right now | |
2358 | * 2) Not just finishing up a search | |
2359 | * 3) flush timer is empty | |
2360 | */ | |
b481de9c | 2361 | } else { |
c33104f0 TW |
2362 | if ((!update_lq) && (!done_search) && (!lq_sta->flush_timer)) |
2363 | lq_sta->flush_timer = jiffies; | |
b481de9c ZY |
2364 | } |
2365 | ||
2366 | out: | |
978785a3 | 2367 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); |
b481de9c | 2368 | i = index; |
b7e35008 | 2369 | lq_sta->last_txrate_idx = i; |
b481de9c | 2370 | |
b481de9c ZY |
2371 | return; |
2372 | } | |
2373 | ||
2374 | ||
c79dd5b5 | 2375 | static void rs_initialize_lq(struct iwl_priv *priv, |
270243a5 | 2376 | struct ieee80211_conf *conf, |
4b7679a5 JB |
2377 | struct ieee80211_sta *sta, |
2378 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 2379 | { |
e227ceac | 2380 | struct iwl_scale_tbl_info *tbl; |
b481de9c | 2381 | int rate_idx; |
aade00ce | 2382 | int i; |
39e88504 | 2383 | u32 rate; |
aade00ce GC |
2384 | u8 use_green = rs_use_green(priv, conf); |
2385 | u8 active_tbl = 0; | |
2386 | u8 valid_tx_ant; | |
b481de9c | 2387 | |
4b7679a5 | 2388 | if (!sta || !lq_sta) |
b481de9c ZY |
2389 | goto out; |
2390 | ||
b7e35008 | 2391 | i = lq_sta->last_txrate_idx; |
b481de9c | 2392 | |
c33104f0 | 2393 | if ((lq_sta->lq.sta_id == 0xff) && |
05c914fe | 2394 | (priv->iw_mode == NL80211_IFTYPE_ADHOC)) |
b481de9c ZY |
2395 | goto out; |
2396 | ||
aade00ce GC |
2397 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
2398 | ||
c33104f0 TW |
2399 | if (!lq_sta->search_better_tbl) |
2400 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2401 | else |
c33104f0 | 2402 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2403 | |
c33104f0 | 2404 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2405 | |
2406 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2407 | i = 0; | |
2408 | ||
1826dcc0 | 2409 | rate = iwl_rates[i].plcp; |
eb48dcaf WT |
2410 | tbl->ant_type = first_antenna(valid_tx_ant); |
2411 | rate |= tbl->ant_type << RATE_MCS_ANT_POS; | |
b481de9c ZY |
2412 | |
2413 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
39e88504 | 2414 | rate |= RATE_MCS_CCK_MSK; |
b481de9c | 2415 | |
39e88504 | 2416 | rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
aade00ce GC |
2417 | if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2418 | rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
b481de9c | 2419 | |
978785a3 | 2420 | rate = rate_n_flags_from_tbl(priv, tbl, rate_idx, use_green); |
39e88504 | 2421 | tbl->current_rate = rate; |
eecd6e57 | 2422 | rs_set_expected_tpt_table(lq_sta, tbl); |
07bc28ed | 2423 | rs_fill_link_cmd(NULL, lq_sta, rate); |
66c73db7 | 2424 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c ZY |
2425 | out: |
2426 | return; | |
2427 | } | |
2428 | ||
e6a9854b JB |
2429 | static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta, |
2430 | struct ieee80211_tx_rate_control *txrc) | |
b481de9c ZY |
2431 | { |
2432 | ||
e6a9854b JB |
2433 | struct sk_buff *skb = txrc->skb; |
2434 | struct ieee80211_supported_band *sband = txrc->sband; | |
4b7679a5 JB |
2435 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
2436 | struct ieee80211_conf *conf = &priv->hw->conf; | |
b481de9c | 2437 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
e6a9854b | 2438 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
417f114b TW |
2439 | struct iwl_lq_sta *lq_sta = priv_sta; |
2440 | int rate_idx; | |
c338ba3c | 2441 | u64 mask_bit = 0; |
b481de9c | 2442 | |
e1623446 | 2443 | IWL_DEBUG_RATE_LIMIT(priv, "rate scale calculate new rate for skb\n"); |
b481de9c | 2444 | |
c6ec7a9b AM |
2445 | /* Get max rate if user set max rate */ |
2446 | if (lq_sta) { | |
2447 | lq_sta->max_rate_idx = txrc->max_rate_idx; | |
2448 | if ((sband->band == IEEE80211_BAND_5GHZ) && | |
2449 | (lq_sta->max_rate_idx != -1)) | |
2450 | lq_sta->max_rate_idx += IWL_FIRST_OFDM_RATE; | |
2451 | if ((lq_sta->max_rate_idx < 0) || | |
2452 | (lq_sta->max_rate_idx >= IWL_RATE_COUNT)) | |
2453 | lq_sta->max_rate_idx = -1; | |
2454 | } | |
2455 | ||
c338ba3c AM |
2456 | if (sta) |
2457 | mask_bit = sta->supp_rates[sband->band]; | |
2458 | ||
2bc454b0 MW |
2459 | /* Send management frames and broadcast/multicast data using lowest |
2460 | * rate. */ | |
417f114b TW |
2461 | if (!ieee80211_is_data(hdr->frame_control) || |
2462 | is_multicast_ether_addr(hdr->addr1) || !sta || !lq_sta) { | |
c338ba3c AM |
2463 | if (!mask_bit) |
2464 | info->control.rates[0].idx = | |
2465 | rate_lowest_index(sband, NULL); | |
2466 | else | |
2467 | info->control.rates[0].idx = | |
2468 | rate_lowest_index(sband, sta); | |
4b7679a5 | 2469 | return; |
b481de9c ZY |
2470 | } |
2471 | ||
417f114b | 2472 | rate_idx = lq_sta->last_txrate_idx; |
b481de9c | 2473 | |
05c914fe | 2474 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 2475 | !lq_sta->ibss_sta_added) { |
e11bc028 AK |
2476 | u8 sta_id = priv->cfg->ops->smgmt->find_station(priv, |
2477 | hdr->addr1); | |
b481de9c ZY |
2478 | |
2479 | if (sta_id == IWL_INVALID_STATION) { | |
e1623446 | 2480 | IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", |
e174961c | 2481 | hdr->addr1); |
06fd3d86 | 2482 | sta_id = priv->cfg->ops->smgmt->add_station(priv, |
e11bc028 AK |
2483 | hdr->addr1, 0, |
2484 | CMD_ASYNC, NULL); | |
b481de9c ZY |
2485 | } |
2486 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2487 | lq_sta->lq.sta_id = sta_id; |
2488 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
2489 | lq_sta->ibss_sta_added = 1; | |
4b7679a5 | 2490 | rs_initialize_lq(priv, conf, sta, lq_sta); |
b481de9c | 2491 | } |
b481de9c ZY |
2492 | } |
2493 | ||
417f114b TW |
2494 | if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT) |
2495 | rate_idx = rate_lowest_index(sband, sta); | |
2496 | else if (sband->band == IEEE80211_BAND_5GHZ) | |
2497 | rate_idx -= IWL_FIRST_OFDM_RATE; | |
b481de9c | 2498 | |
417f114b | 2499 | info->control.rates[0].idx = rate_idx; |
b481de9c ZY |
2500 | } |
2501 | ||
4b7679a5 JB |
2502 | static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta, |
2503 | gfp_t gfp) | |
b481de9c | 2504 | { |
e227ceac | 2505 | struct iwl_lq_sta *lq_sta; |
bf403db8 | 2506 | struct iwl_priv *priv; |
b481de9c ZY |
2507 | int i, j; |
2508 | ||
bf403db8 | 2509 | priv = (struct iwl_priv *)priv_rate; |
e1623446 | 2510 | IWL_DEBUG_RATE(priv, "create station rate scale window\n"); |
b481de9c | 2511 | |
e227ceac | 2512 | lq_sta = kzalloc(sizeof(struct iwl_lq_sta), gfp); |
b481de9c | 2513 | |
c33104f0 | 2514 | if (lq_sta == NULL) |
b481de9c | 2515 | return NULL; |
c33104f0 | 2516 | lq_sta->lq.sta_id = 0xff; |
b481de9c | 2517 | |
63fddb9f | 2518 | |
b481de9c ZY |
2519 | for (j = 0; j < LQ_SIZE; j++) |
2520 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2521 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2522 | |
c33104f0 | 2523 | return lq_sta; |
b481de9c ZY |
2524 | } |
2525 | ||
4b7679a5 JB |
2526 | static void rs_rate_init(void *priv_r, struct ieee80211_supported_band *sband, |
2527 | struct ieee80211_sta *sta, void *priv_sta) | |
b481de9c ZY |
2528 | { |
2529 | int i, j; | |
4b7679a5 JB |
2530 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
2531 | struct ieee80211_conf *conf = &priv->hw->conf; | |
e227ceac | 2532 | struct iwl_lq_sta *lq_sta = priv_sta; |
d5e49036 | 2533 | u16 mask_bit = 0; |
7d049e5a AM |
2534 | int count; |
2535 | int start_rate = 0; | |
b481de9c | 2536 | |
c33104f0 | 2537 | lq_sta->flush_timer = 0; |
4b7679a5 | 2538 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
b481de9c ZY |
2539 | for (j = 0; j < LQ_SIZE; j++) |
2540 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2541 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2542 | |
e1623446 | 2543 | IWL_DEBUG_RATE(priv, "LQ: *** rate scale station global init ***\n"); |
b481de9c ZY |
2544 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2545 | * the lowest or the highest rate.. Could consider using RSSI from | |
2546 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2547 | * after assoc.. */ | |
2548 | ||
c33104f0 | 2549 | lq_sta->ibss_sta_added = 0; |
05c914fe | 2550 | if (priv->iw_mode == NL80211_IFTYPE_AP) { |
e11bc028 AK |
2551 | u8 sta_id = priv->cfg->ops->smgmt->find_station(priv, |
2552 | sta->addr); | |
0795af57 | 2553 | |
b481de9c | 2554 | /* for IBSS the call are from tasklet */ |
e1623446 | 2555 | IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", sta->addr); |
b481de9c ZY |
2556 | |
2557 | if (sta_id == IWL_INVALID_STATION) { | |
e1623446 | 2558 | IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", sta->addr); |
06fd3d86 | 2559 | sta_id = priv->cfg->ops->smgmt->add_station(priv, |
e11bc028 AK |
2560 | sta->addr, 0, |
2561 | CMD_ASYNC, NULL); | |
b481de9c ZY |
2562 | } |
2563 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2564 | lq_sta->lq.sta_id = sta_id; |
2565 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
b481de9c ZY |
2566 | } |
2567 | /* FIXME: this is w/a remove it later */ | |
2568 | priv->assoc_station_added = 1; | |
2569 | } | |
2570 | ||
c33104f0 | 2571 | lq_sta->is_dup = 0; |
c6ec7a9b | 2572 | lq_sta->max_rate_idx = -1; |
7d049e5a | 2573 | lq_sta->missed_rate_counter = IWL_MISSED_RATE_MAX; |
c33104f0 | 2574 | lq_sta->is_green = rs_use_green(priv, conf); |
39e88504 | 2575 | lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000); |
c33104f0 | 2576 | lq_sta->active_rate_basic = priv->active_rate_basic; |
8318d78a | 2577 | lq_sta->band = priv->band; |
77626355 BC |
2578 | /* |
2579 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2580 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2581 | */ | |
ae5eb026 JB |
2582 | lq_sta->active_siso_rate = sta->ht_cap.mcs.rx_mask[0] << 1; |
2583 | lq_sta->active_siso_rate |= sta->ht_cap.mcs.rx_mask[0] & 0x1; | |
c33104f0 | 2584 | lq_sta->active_siso_rate &= ~((u16)0x2); |
fde0db31 | 2585 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; |
b481de9c | 2586 | |
77626355 | 2587 | /* Same here */ |
ae5eb026 JB |
2588 | lq_sta->active_mimo2_rate = sta->ht_cap.mcs.rx_mask[1] << 1; |
2589 | lq_sta->active_mimo2_rate |= sta->ht_cap.mcs.rx_mask[1] & 0x1; | |
fde0db31 GC |
2590 | lq_sta->active_mimo2_rate &= ~((u16)0x2); |
2591 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2592 | ||
ae5eb026 JB |
2593 | lq_sta->active_mimo3_rate = sta->ht_cap.mcs.rx_mask[2] << 1; |
2594 | lq_sta->active_mimo3_rate |= sta->ht_cap.mcs.rx_mask[2] & 0x1; | |
fde0db31 GC |
2595 | lq_sta->active_mimo3_rate &= ~((u16)0x2); |
2596 | lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; | |
2597 | ||
e1623446 | 2598 | IWL_DEBUG_RATE(priv, "SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n", |
c33104f0 | 2599 | lq_sta->active_siso_rate, |
fde0db31 GC |
2600 | lq_sta->active_mimo2_rate, |
2601 | lq_sta->active_mimo3_rate); | |
2602 | ||
a96a27f9 | 2603 | /* These values will be overridden later */ |
07bc28ed GC |
2604 | lq_sta->lq.general_params.single_stream_ant_msk = ANT_A; |
2605 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
2606 | ||
0c11b4de RR |
2607 | /* as default allow aggregation for all tids */ |
2608 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
c33104f0 | 2609 | lq_sta->drv = priv; |
b481de9c | 2610 | |
d5e49036 | 2611 | /* Find highest tx rate supported by hardware and destination station */ |
7d049e5a AM |
2612 | mask_bit = sta->supp_rates[sband->band]; |
2613 | count = sband->n_bitrates; | |
2614 | if (sband->band == IEEE80211_BAND_5GHZ) { | |
2615 | count += IWL_FIRST_OFDM_RATE; | |
2616 | start_rate = IWL_FIRST_OFDM_RATE; | |
2617 | mask_bit <<= IWL_FIRST_OFDM_RATE; | |
2618 | } | |
2619 | ||
2620 | mask_bit = mask_bit & lq_sta->active_legacy_rate; | |
2621 | lq_sta->last_txrate_idx = 4; | |
2622 | for (i = start_rate; i < count; i++) | |
d5e49036 MA |
2623 | if (mask_bit & BIT(i)) |
2624 | lq_sta->last_txrate_idx = i; | |
2625 | ||
4b7679a5 | 2626 | rs_initialize_lq(priv, conf, sta, lq_sta); |
b481de9c ZY |
2627 | } |
2628 | ||
fde0db31 | 2629 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
e227ceac | 2630 | struct iwl_lq_sta *lq_sta, u32 new_rate) |
b481de9c | 2631 | { |
e227ceac | 2632 | struct iwl_scale_tbl_info tbl_type; |
b481de9c | 2633 | int index = 0; |
b481de9c | 2634 | int rate_idx; |
1b696de2 | 2635 | int repeat_rate = 0; |
aade00ce | 2636 | u8 ant_toggle_cnt = 0; |
b481de9c | 2637 | u8 use_ht_possible = 1; |
aade00ce | 2638 | u8 valid_tx_ant = 0; |
07bc28ed | 2639 | struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq; |
b481de9c | 2640 | |
77626355 | 2641 | /* Override starting rate (index 0) if needed for debug purposes */ |
39e88504 | 2642 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
98d7e09a | 2643 | |
39e88504 | 2644 | /* Interpret new_rate (rate_n_flags) */ |
aade00ce | 2645 | memset(&tbl_type, 0, sizeof(tbl_type)); |
39e88504 | 2646 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
b481de9c ZY |
2647 | &tbl_type, &rate_idx); |
2648 | ||
77626355 | 2649 | /* How many times should we repeat the initial rate? */ |
b481de9c | 2650 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce | 2651 | ant_toggle_cnt = 1; |
1b696de2 | 2652 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2653 | } else { |
1b696de2 | 2654 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2655 | } |
b481de9c ZY |
2656 | |
2657 | lq_cmd->general_params.mimo_delimiter = | |
2658 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2659 | |
2660 | /* Fill 1st table entry (index 0) */ | |
39e88504 | 2661 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c | 2662 | |
07bc28ed GC |
2663 | if (num_of_ant(tbl_type.ant_type) == 1) { |
2664 | lq_cmd->general_params.single_stream_ant_msk = | |
2665 | tbl_type.ant_type; | |
2666 | } else if (num_of_ant(tbl_type.ant_type) == 2) { | |
2667 | lq_cmd->general_params.dual_stream_ant_msk = | |
2668 | tbl_type.ant_type; | |
2669 | } /* otherwise we don't modify the existing value */ | |
b481de9c ZY |
2670 | |
2671 | index++; | |
1b696de2 | 2672 | repeat_rate--; |
b481de9c | 2673 | |
aade00ce GC |
2674 | if (priv) |
2675 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2676 | ||
77626355 | 2677 | /* Fill rest of rate table */ |
b481de9c | 2678 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2679 | /* Repeat initial/next rate. |
2680 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2681 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2682 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c | 2683 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2684 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2685 | ant_toggle_cnt++; | |
2686 | else if (priv && | |
2687 | rs_toggle_antenna(valid_tx_ant, | |
2688 | &new_rate, &tbl_type)) | |
2689 | ant_toggle_cnt = 1; | |
2690 | } | |
98d7e09a | 2691 | |
77626355 | 2692 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2693 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2694 | |
2695 | /* Fill next table entry */ | |
b481de9c | 2696 | lq_cmd->rs_table[index].rate_n_flags = |
39e88504 | 2697 | cpu_to_le32(new_rate); |
1b696de2 | 2698 | repeat_rate--; |
b481de9c ZY |
2699 | index++; |
2700 | } | |
2701 | ||
39e88504 | 2702 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
2703 | &rate_idx); |
2704 | ||
77626355 BC |
2705 | /* Indicate to uCode which entries might be MIMO. |
2706 | * If initial rate was MIMO, this will finally end up | |
2707 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
2708 | if (is_mimo(tbl_type.lq_type)) |
2709 | lq_cmd->general_params.mimo_delimiter = index; | |
2710 | ||
77626355 | 2711 | /* Get next rate */ |
39e88504 GC |
2712 | new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
2713 | use_ht_possible); | |
b481de9c | 2714 | |
77626355 | 2715 | /* How many times should we repeat the next rate? */ |
b481de9c | 2716 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2717 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2718 | ant_toggle_cnt++; | |
2719 | else if (priv && | |
2720 | rs_toggle_antenna(valid_tx_ant, | |
2721 | &new_rate, &tbl_type)) | |
2722 | ant_toggle_cnt = 1; | |
2723 | ||
1b696de2 | 2724 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2725 | } else { |
1b696de2 | 2726 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2727 | } |
b481de9c | 2728 | |
77626355 BC |
2729 | /* Don't allow HT rates after next pass. |
2730 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
2731 | use_ht_possible = 0; |
2732 | ||
77626355 | 2733 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2734 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2735 | |
2736 | /* Fill next table entry */ | |
39e88504 | 2737 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c ZY |
2738 | |
2739 | index++; | |
1b696de2 | 2740 | repeat_rate--; |
b481de9c ZY |
2741 | } |
2742 | ||
5e1dd8dc | 2743 | lq_cmd->agg_params.agg_frame_cnt_limit = 64; |
b481de9c ZY |
2744 | lq_cmd->agg_params.agg_dis_start_th = 3; |
2745 | lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); | |
b481de9c ZY |
2746 | } |
2747 | ||
4b7679a5 | 2748 | static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) |
b481de9c | 2749 | { |
4b7679a5 | 2750 | return hw->priv; |
b481de9c ZY |
2751 | } |
2752 | /* rate scale requires free function to be implemented */ | |
2753 | static void rs_free(void *priv_rate) | |
2754 | { | |
2755 | return; | |
2756 | } | |
2757 | ||
4b7679a5 JB |
2758 | static void rs_free_sta(void *priv_r, struct ieee80211_sta *sta, |
2759 | void *priv_sta) | |
b481de9c | 2760 | { |
e227ceac | 2761 | struct iwl_lq_sta *lq_sta = priv_sta; |
45527c2c | 2762 | struct iwl_priv *priv __maybe_unused = priv_r; |
b481de9c | 2763 | |
e1623446 | 2764 | IWL_DEBUG_RATE(priv, "enter\n"); |
c33104f0 | 2765 | kfree(lq_sta); |
e1623446 | 2766 | IWL_DEBUG_RATE(priv, "leave\n"); |
b481de9c ZY |
2767 | } |
2768 | ||
2769 | ||
93dc646a | 2770 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2771 | static int open_file_generic(struct inode *inode, struct file *file) |
2772 | { | |
2773 | file->private_data = inode->i_private; | |
2774 | return 0; | |
2775 | } | |
e227ceac TW |
2776 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
2777 | u32 *rate_n_flags, int index) | |
98d7e09a | 2778 | { |
bf403db8 | 2779 | struct iwl_priv *priv; |
3c4955f8 WYG |
2780 | u8 valid_tx_ant; |
2781 | u8 ant_sel_tx; | |
bf403db8 EK |
2782 | |
2783 | priv = lq_sta->drv; | |
3c4955f8 | 2784 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
39e88504 | 2785 | if (lq_sta->dbg_fixed_rate) { |
3c4955f8 WYG |
2786 | ant_sel_tx = |
2787 | ((lq_sta->dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) | |
2788 | >> RATE_MCS_ANT_POS); | |
2789 | if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) { | |
39e88504 | 2790 | *rate_n_flags = lq_sta->dbg_fixed_rate; |
3c4955f8 | 2791 | IWL_DEBUG_RATE(priv, "Fixed rate ON\n"); |
39e88504 | 2792 | } else { |
3c4955f8 WYG |
2793 | lq_sta->dbg_fixed_rate = 0; |
2794 | IWL_ERR(priv, | |
2795 | "Invalid antenna selection 0x%X, Valid is 0x%X\n", | |
2796 | ant_sel_tx, valid_tx_ant); | |
2797 | IWL_DEBUG_RATE(priv, "Fixed rate OFF\n"); | |
39e88504 | 2798 | } |
39e88504 | 2799 | } else { |
e1623446 | 2800 | IWL_DEBUG_RATE(priv, "Fixed rate OFF\n"); |
98d7e09a | 2801 | } |
98d7e09a | 2802 | } |
5ae212c9 | 2803 | |
98d7e09a ZY |
2804 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2805 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2806 | { | |
e227ceac | 2807 | struct iwl_lq_sta *lq_sta = file->private_data; |
bf403db8 | 2808 | struct iwl_priv *priv; |
98d7e09a ZY |
2809 | char buf[64]; |
2810 | int buf_size; | |
2811 | u32 parsed_rate; | |
2812 | ||
bf403db8 | 2813 | priv = lq_sta->drv; |
98d7e09a ZY |
2814 | memset(buf, 0, sizeof(buf)); |
2815 | buf_size = min(count, sizeof(buf) - 1); | |
2816 | if (copy_from_user(buf, user_buf, buf_size)) | |
2817 | return -EFAULT; | |
2818 | ||
2819 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
39e88504 | 2820 | lq_sta->dbg_fixed_rate = parsed_rate; |
98d7e09a | 2821 | else |
39e88504 | 2822 | lq_sta->dbg_fixed_rate = 0; |
98d7e09a | 2823 | |
39e88504 GC |
2824 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ |
2825 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2826 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2827 | lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
98d7e09a | 2828 | |
e1623446 | 2829 | IWL_DEBUG_RATE(priv, "sta_id %d rate 0x%X\n", |
39e88504 | 2830 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
98d7e09a | 2831 | |
39e88504 | 2832 | if (lq_sta->dbg_fixed_rate) { |
07bc28ed | 2833 | rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
66c73db7 | 2834 | iwl_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC); |
98d7e09a ZY |
2835 | } |
2836 | ||
2837 | return count; | |
2838 | } | |
0209dc11 | 2839 | |
5ae212c9 ZY |
2840 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2841 | char __user *user_buf, size_t count, loff_t *ppos) | |
2842 | { | |
a412c804 | 2843 | char *buff; |
5ae212c9 ZY |
2844 | int desc = 0; |
2845 | int i = 0; | |
12b96817 | 2846 | int index = 0; |
a412c804 | 2847 | ssize_t ret; |
5ae212c9 | 2848 | |
e227ceac | 2849 | struct iwl_lq_sta *lq_sta = file->private_data; |
d8ae4f52 | 2850 | struct iwl_priv *priv; |
adb7b5e6 | 2851 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
5ae212c9 | 2852 | |
d8ae4f52 | 2853 | priv = lq_sta->drv; |
a412c804 FS |
2854 | buff = kmalloc(1024, GFP_KERNEL); |
2855 | if (!buff) | |
2856 | return -ENOMEM; | |
2857 | ||
c33104f0 | 2858 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 2859 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 | 2860 | lq_sta->total_failed, lq_sta->total_success, |
39e88504 | 2861 | lq_sta->active_legacy_rate); |
98d7e09a | 2862 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
39e88504 | 2863 | lq_sta->dbg_fixed_rate); |
d8ae4f52 WYG |
2864 | desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n", |
2865 | (priv->hw_params.valid_tx_ant & ANT_A) ? "ANT_A," : "", | |
2866 | (priv->hw_params.valid_tx_ant & ANT_B) ? "ANT_B," : "", | |
2867 | (priv->hw_params.valid_tx_ant & ANT_C) ? "ANT_C" : ""); | |
adb7b5e6 WYG |
2868 | desc += sprintf(buff+desc, "lq type %s\n", |
2869 | (is_legacy(tbl->lq_type)) ? "legacy" : "HT"); | |
2870 | if (is_Ht(tbl->lq_type)) { | |
2871 | desc += sprintf(buff+desc, " %s", | |
2872 | (is_siso(tbl->lq_type)) ? "SISO" : | |
2873 | ((is_mimo2(tbl->lq_type)) ? "MIMO2" : "MIMO3")); | |
2874 | desc += sprintf(buff+desc, " %s", | |
2875 | (tbl->is_fat) ? "40MHz" : "20MHz"); | |
2876 | desc += sprintf(buff+desc, " %s\n", (tbl->is_SGI) ? "SGI" : ""); | |
2877 | } | |
12b96817 WYG |
2878 | desc += sprintf(buff+desc, "last tx rate=0x%X\n", |
2879 | lq_sta->last_rate_n_flags); | |
5ae212c9 ZY |
2880 | desc += sprintf(buff+desc, "general:" |
2881 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
2882 | lq_sta->lq.general_params.flags, |
2883 | lq_sta->lq.general_params.mimo_delimiter, | |
2884 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2885 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
2886 | |
2887 | desc += sprintf(buff+desc, "agg:" | |
2888 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
2889 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
2890 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2891 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
2892 | |
2893 | desc += sprintf(buff+desc, | |
2894 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
2895 | lq_sta->lq.general_params.start_rate_index[0], |
2896 | lq_sta->lq.general_params.start_rate_index[1], | |
2897 | lq_sta->lq.general_params.start_rate_index[2], | |
2898 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 | 2899 | |
12b96817 WYG |
2900 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { |
2901 | index = iwl_hwrate_to_plcp_idx( | |
2902 | le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); | |
2903 | if (is_legacy(tbl->lq_type)) { | |
2904 | desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n", | |
2905 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
2906 | iwl_rate_mcs[index].mbps); | |
2907 | } else { | |
2908 | desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps (%s)\n", | |
2909 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
2910 | iwl_rate_mcs[index].mbps, iwl_rate_mcs[index].mcs); | |
2911 | } | |
2912 | } | |
5ae212c9 | 2913 | |
a412c804 FS |
2914 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
2915 | kfree(buff); | |
2916 | return ret; | |
5ae212c9 ZY |
2917 | } |
2918 | ||
2919 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2920 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2921 | .read = rs_sta_dbgfs_scale_table_read, |
2922 | .open = open_file_generic, | |
2923 | }; | |
0209dc11 ZY |
2924 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2925 | char __user *user_buf, size_t count, loff_t *ppos) | |
2926 | { | |
a412c804 | 2927 | char *buff; |
0209dc11 ZY |
2928 | int desc = 0; |
2929 | int i, j; | |
a412c804 | 2930 | ssize_t ret; |
0209dc11 | 2931 | |
e227ceac | 2932 | struct iwl_lq_sta *lq_sta = file->private_data; |
a412c804 FS |
2933 | |
2934 | buff = kmalloc(1024, GFP_KERNEL); | |
2935 | if (!buff) | |
2936 | return -ENOMEM; | |
2937 | ||
0209dc11 ZY |
2938 | for (i = 0; i < LQ_SIZE; i++) { |
2939 | desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" | |
2940 | "rate=0x%X\n", | |
c3056065 | 2941 | lq_sta->active_tbl == i ? "*" : "x", |
c33104f0 TW |
2942 | lq_sta->lq_info[i].lq_type, |
2943 | lq_sta->lq_info[i].is_SGI, | |
2944 | lq_sta->lq_info[i].is_fat, | |
2945 | lq_sta->lq_info[i].is_dup, | |
39e88504 | 2946 | lq_sta->lq_info[i].current_rate); |
0209dc11 ZY |
2947 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
2948 | desc += sprintf(buff+desc, | |
c33104f0 TW |
2949 | "counter=%d success=%d %%=%d\n", |
2950 | lq_sta->lq_info[i].win[j].counter, | |
2951 | lq_sta->lq_info[i].win[j].success_counter, | |
2952 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
2953 | } |
2954 | } | |
a412c804 FS |
2955 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
2956 | kfree(buff); | |
2957 | return ret; | |
0209dc11 ZY |
2958 | } |
2959 | ||
2960 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2961 | .read = rs_sta_dbgfs_stats_table_read, | |
2962 | .open = open_file_generic, | |
2963 | }; | |
5ae212c9 | 2964 | |
93dc646a ZY |
2965 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2966 | struct dentry *dir) | |
2967 | { | |
e227ceac | 2968 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 | 2969 | lq_sta->rs_sta_dbgfs_scale_table_file = |
0209dc11 | 2970 | debugfs_create_file("rate_scale_table", 0600, dir, |
c33104f0 TW |
2971 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
2972 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
0209dc11 | 2973 | debugfs_create_file("rate_stats_table", 0600, dir, |
c33104f0 | 2974 | lq_sta, &rs_sta_dbgfs_stats_table_ops); |
0c11b4de RR |
2975 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
2976 | debugfs_create_u8("tx_agg_tid_enable", 0600, dir, | |
2977 | &lq_sta->tx_agg_tid_en); | |
0c11b4de | 2978 | |
93dc646a ZY |
2979 | } |
2980 | ||
2981 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2982 | { | |
e227ceac | 2983 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 TW |
2984 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); |
2985 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
0c11b4de | 2986 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); |
93dc646a ZY |
2987 | } |
2988 | #endif | |
2989 | ||
b481de9c ZY |
2990 | static struct rate_control_ops rs_ops = { |
2991 | .module = NULL, | |
2992 | .name = RS_NAME, | |
2993 | .tx_status = rs_tx_status, | |
2994 | .get_rate = rs_get_rate, | |
2995 | .rate_init = rs_rate_init, | |
b481de9c ZY |
2996 | .alloc = rs_alloc, |
2997 | .free = rs_free, | |
2998 | .alloc_sta = rs_alloc_sta, | |
2999 | .free_sta = rs_free_sta, | |
93dc646a ZY |
3000 | #ifdef CONFIG_MAC80211_DEBUGFS |
3001 | .add_sta_debugfs = rs_add_debugfs, | |
3002 | .remove_sta_debugfs = rs_remove_debugfs, | |
3003 | #endif | |
b481de9c ZY |
3004 | }; |
3005 | ||
e227ceac | 3006 | int iwlagn_rate_control_register(void) |
b481de9c | 3007 | { |
897e1cf2 | 3008 | return ieee80211_rate_control_register(&rs_ops); |
b481de9c ZY |
3009 | } |
3010 | ||
e227ceac | 3011 | void iwlagn_rate_control_unregister(void) |
b481de9c ZY |
3012 | { |
3013 | ieee80211_rate_control_unregister(&rs_ops); | |
3014 | } | |
3015 |