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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 | 54 | /* max time to accum history 2 seconds */ |
447fee70 | 55 | #define IWL_RATE_SCALE_FLUSH_INTVL (3*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 | 99 | u8 is_SGI; /* 1 = short guard interval */ |
7aafef1c | 100 | u8 is_ht40; /* 1 = 40 MHz channel width */ |
77626355 BC |
101 | u8 is_dup; /* 1 = duplicated data streams */ |
102 | u8 action; /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */ | |
d6e93399 | 103 | u8 max_search; /* maximun number of tables we can search */ |
77626355 | 104 | s32 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */ |
39e88504 | 105 | u32 current_rate; /* rate_n_flags, uCode API format */ |
e227ceac | 106 | struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */ |
b481de9c ZY |
107 | }; |
108 | ||
e227ceac | 109 | struct iwl_traffic_load { |
0c11b4de RR |
110 | unsigned long time_stamp; /* age of the oldest statistics */ |
111 | u32 packet_count[TID_QUEUE_MAX_SIZE]; /* packet count in this time | |
112 | * slice */ | |
113 | u32 total; /* total num of packets during the | |
114 | * last TID_MAX_TIME_DIFF */ | |
115 | u8 queue_count; /* number of queues that has | |
116 | * been used since the last cleanup */ | |
117 | u8 head; /* start of the circular buffer */ | |
118 | }; | |
119 | ||
77626355 | 120 | /** |
e227ceac | 121 | * struct iwl_lq_sta -- driver's rate scaling private structure |
77626355 BC |
122 | * |
123 | * Pointer to this gets passed back and forth between driver and mac80211. | |
124 | */ | |
e227ceac | 125 | struct iwl_lq_sta { |
77626355 BC |
126 | u8 active_tbl; /* index of active table, range 0-1 */ |
127 | u8 enable_counter; /* indicates HT mode */ | |
128 | u8 stay_in_tbl; /* 1: disallow, 0: allow search for new mode */ | |
129 | u8 search_better_tbl; /* 1: currently trying alternate mode */ | |
b481de9c | 130 | s32 last_tpt; |
77626355 BC |
131 | |
132 | /* The following determine when to search for a new mode */ | |
b481de9c | 133 | u32 table_count_limit; |
77626355 BC |
134 | u32 max_failure_limit; /* # failed frames before new search */ |
135 | u32 max_success_limit; /* # successful frames before new search */ | |
b481de9c | 136 | u32 table_count; |
77626355 BC |
137 | u32 total_failed; /* total failed frames, any/all rates */ |
138 | u32 total_success; /* total successful frames, any/all rates */ | |
447fee70 | 139 | u64 flush_timer; /* time staying in mode before new search */ |
77626355 BC |
140 | |
141 | u8 action_counter; /* # mode-switch actions tried */ | |
b481de9c ZY |
142 | u8 is_green; |
143 | u8 is_dup; | |
8318d78a | 144 | enum ieee80211_band band; |
b481de9c | 145 | u8 ibss_sta_added; |
77626355 BC |
146 | |
147 | /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */ | |
02dede04 | 148 | u32 supp_rates; |
39e88504 | 149 | u16 active_legacy_rate; |
b481de9c | 150 | u16 active_siso_rate; |
fde0db31 GC |
151 | u16 active_mimo2_rate; |
152 | u16 active_mimo3_rate; | |
b481de9c | 153 | u16 active_rate_basic; |
c6ec7a9b | 154 | s8 max_rate_idx; /* Max rate set by user */ |
7d049e5a | 155 | u8 missed_rate_counter; |
77626355 | 156 | |
66c73db7 | 157 | struct iwl_link_quality_cmd lq; |
e227ceac TW |
158 | struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */ |
159 | struct iwl_traffic_load load[TID_MAX_LOAD_COUNT]; | |
0c11b4de | 160 | u8 tx_agg_tid_en; |
5ae212c9 | 161 | #ifdef CONFIG_MAC80211_DEBUGFS |
98d7e09a | 162 | struct dentry *rs_sta_dbgfs_scale_table_file; |
0209dc11 | 163 | struct dentry *rs_sta_dbgfs_stats_table_file; |
38167459 | 164 | struct dentry *rs_sta_dbgfs_rate_scale_data_file; |
0c11b4de | 165 | struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file; |
39e88504 | 166 | u32 dbg_fixed_rate; |
5ae212c9 | 167 | #endif |
6243065d | 168 | struct iwl_priv *drv; |
b7e35008 JB |
169 | |
170 | /* used to be in sta_info */ | |
171 | int last_txrate_idx; | |
12b96817 WYG |
172 | /* last tx rate_n_flags */ |
173 | u32 last_rate_n_flags; | |
b481de9c ZY |
174 | }; |
175 | ||
c79dd5b5 | 176 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
514d65c1 | 177 | struct sk_buff *skb, |
4b7679a5 JB |
178 | struct ieee80211_sta *sta, |
179 | struct iwl_lq_sta *lq_sta); | |
46f9381a | 180 | static void rs_fill_link_cmd(struct iwl_priv *priv, |
e227ceac | 181 | struct iwl_lq_sta *lq_sta, u32 rate_n_flags); |
b481de9c ZY |
182 | |
183 | ||
98d7e09a | 184 | #ifdef CONFIG_MAC80211_DEBUGFS |
e227ceac TW |
185 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
186 | u32 *rate_n_flags, int index); | |
98d7e09a | 187 | #else |
e227ceac TW |
188 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
189 | u32 *rate_n_flags, int index) | |
98d7e09a ZY |
190 | {} |
191 | #endif | |
77626355 BC |
192 | |
193 | /* | |
194 | * Expected throughput metrics for following rates: | |
195 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
196 | * "G" is the only table that supports CCK (the first 4 rates). | |
197 | */ | |
584a0f00 | 198 | |
b481de9c ZY |
199 | static s32 expected_tpt_A[IWL_RATE_COUNT] = { |
200 | 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
201 | }; | |
202 | ||
203 | static s32 expected_tpt_G[IWL_RATE_COUNT] = { | |
204 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
205 | }; | |
206 | ||
207 | static s32 expected_tpt_siso20MHz[IWL_RATE_COUNT] = { | |
208 | 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202 | |
209 | }; | |
210 | ||
211 | static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { | |
212 | 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 | |
213 | }; | |
214 | ||
584a0f00 | 215 | static s32 expected_tpt_mimo2_20MHz[IWL_RATE_COUNT] = { |
b481de9c ZY |
216 | 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 |
217 | }; | |
218 | ||
584a0f00 | 219 | static s32 expected_tpt_mimo2_20MHzSGI[IWL_RATE_COUNT] = { |
b481de9c ZY |
220 | 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 |
221 | }; | |
222 | ||
223 | static s32 expected_tpt_siso40MHz[IWL_RATE_COUNT] = { | |
224 | 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257 | |
225 | }; | |
226 | ||
227 | static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { | |
228 | 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 | |
229 | }; | |
230 | ||
584a0f00 | 231 | static s32 expected_tpt_mimo2_40MHz[IWL_RATE_COUNT] = { |
b481de9c ZY |
232 | 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 |
233 | }; | |
234 | ||
584a0f00 | 235 | static s32 expected_tpt_mimo2_40MHzSGI[IWL_RATE_COUNT] = { |
b481de9c ZY |
236 | 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 |
237 | }; | |
238 | ||
584a0f00 WYG |
239 | /* Expected throughput metric MIMO3 */ |
240 | static s32 expected_tpt_mimo3_20MHz[IWL_RATE_COUNT] = { | |
241 | 0, 0, 0, 0, 99, 99, 153, 186, 208, 239, 256, 263, 268 | |
242 | }; | |
243 | ||
244 | static s32 expected_tpt_mimo3_20MHzSGI[IWL_RATE_COUNT] = { | |
245 | 0, 0, 0, 0, 106, 106, 162, 194, 215, 246, 262, 268, 273 | |
246 | }; | |
247 | ||
248 | static s32 expected_tpt_mimo3_40MHz[IWL_RATE_COUNT] = { | |
249 | 0, 0, 0, 0, 152, 152, 211, 239, 255, 279, 290, 294, 297 | |
250 | }; | |
251 | ||
252 | static s32 expected_tpt_mimo3_40MHzSGI[IWL_RATE_COUNT] = { | |
253 | 0, 0, 0, 0, 160, 160, 219, 245, 261, 284, 294, 297, 300 | |
254 | }; | |
255 | ||
12b96817 WYG |
256 | /* mbps, mcs */ |
257 | const static struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = { | |
258 | {"1", ""}, | |
259 | {"2", ""}, | |
260 | {"5.5", ""}, | |
261 | {"11", ""}, | |
262 | {"6", "BPSK 1/2"}, | |
263 | {"9", "BPSK 1/2"}, | |
264 | {"12", "QPSK 1/2"}, | |
265 | {"18", "QPSK 3/4"}, | |
266 | {"24", "16QAM 1/2"}, | |
267 | {"36", "16QAM 3/4"}, | |
268 | {"48", "64QAM 2/3"}, | |
269 | {"54", "64QAM 3/4"}, | |
270 | {"60", "64QAM 5/6"} | |
271 | }; | |
272 | ||
a9c146b3 WYG |
273 | #define MCS_INDEX_PER_STREAM (8) |
274 | ||
39e88504 | 275 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
b481de9c ZY |
276 | { |
277 | return (u8)(rate_n_flags & 0xFF); | |
278 | } | |
279 | ||
e227ceac | 280 | static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) |
b481de9c ZY |
281 | { |
282 | window->data = 0; | |
283 | window->success_counter = 0; | |
284 | window->success_ratio = IWL_INVALID_VALUE; | |
285 | window->counter = 0; | |
286 | window->average_tpt = IWL_INVALID_VALUE; | |
287 | window->stamp = 0; | |
b481de9c ZY |
288 | } |
289 | ||
aade00ce GC |
290 | static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
291 | { | |
3ac7f146 | 292 | return (ant_type & valid_antenna) == ant_type; |
aade00ce GC |
293 | } |
294 | ||
0c11b4de RR |
295 | /* |
296 | * removes the old data from the statistics. All data that is older than | |
297 | * TID_MAX_TIME_DIFF, will be deleted. | |
298 | */ | |
e227ceac | 299 | static void rs_tl_rm_old_stats(struct iwl_traffic_load *tl, u32 curr_time) |
0c11b4de RR |
300 | { |
301 | /* The oldest age we want to keep */ | |
302 | u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; | |
303 | ||
304 | while (tl->queue_count && | |
305 | (tl->time_stamp < oldest_time)) { | |
306 | tl->total -= tl->packet_count[tl->head]; | |
307 | tl->packet_count[tl->head] = 0; | |
308 | tl->time_stamp += TID_QUEUE_CELL_SPACING; | |
309 | tl->queue_count--; | |
310 | tl->head++; | |
311 | if (tl->head >= TID_QUEUE_MAX_SIZE) | |
312 | tl->head = 0; | |
313 | } | |
314 | } | |
315 | ||
316 | /* | |
317 | * increment traffic load value for tid and also remove | |
318 | * any old values if passed the certain time period | |
319 | */ | |
e227ceac | 320 | static u8 rs_tl_add_packet(struct iwl_lq_sta *lq_data, |
faa29718 | 321 | struct ieee80211_hdr *hdr) |
0c11b4de RR |
322 | { |
323 | u32 curr_time = jiffies_to_msecs(jiffies); | |
324 | u32 time_diff; | |
325 | s32 index; | |
e227ceac | 326 | struct iwl_traffic_load *tl = NULL; |
54dbb525 | 327 | u8 tid; |
0c11b4de | 328 | |
417f114b | 329 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
fd7c8a40 | 330 | u8 *qc = ieee80211_get_qos_ctl(hdr); |
54dbb525 TW |
331 | tid = qc[0] & 0xf; |
332 | } else | |
faa29718 | 333 | return MAX_TID_COUNT; |
0c11b4de | 334 | |
e6a6cf4c RC |
335 | if (unlikely(tid >= TID_MAX_LOAD_COUNT)) |
336 | return MAX_TID_COUNT; | |
337 | ||
0c11b4de RR |
338 | tl = &lq_data->load[tid]; |
339 | ||
340 | curr_time -= curr_time % TID_ROUND_VALUE; | |
341 | ||
342 | /* Happens only for the first packet. Initialize the data */ | |
343 | if (!(tl->queue_count)) { | |
344 | tl->total = 1; | |
345 | tl->time_stamp = curr_time; | |
346 | tl->queue_count = 1; | |
347 | tl->head = 0; | |
348 | tl->packet_count[0] = 1; | |
faa29718 | 349 | return MAX_TID_COUNT; |
0c11b4de RR |
350 | } |
351 | ||
352 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
353 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
354 | ||
355 | /* The history is too long: remove data that is older than */ | |
356 | /* TID_MAX_TIME_DIFF */ | |
357 | if (index >= TID_QUEUE_MAX_SIZE) | |
358 | rs_tl_rm_old_stats(tl, curr_time); | |
359 | ||
360 | index = (tl->head + index) % TID_QUEUE_MAX_SIZE; | |
361 | tl->packet_count[index] = tl->packet_count[index] + 1; | |
362 | tl->total = tl->total + 1; | |
363 | ||
364 | if ((index + 1) > tl->queue_count) | |
365 | tl->queue_count = index + 1; | |
faa29718 RR |
366 | |
367 | return tid; | |
0c11b4de RR |
368 | } |
369 | ||
370 | /* | |
371 | get the traffic load value for tid | |
372 | */ | |
e227ceac | 373 | static u32 rs_tl_get_load(struct iwl_lq_sta *lq_data, u8 tid) |
0c11b4de RR |
374 | { |
375 | u32 curr_time = jiffies_to_msecs(jiffies); | |
376 | u32 time_diff; | |
377 | s32 index; | |
e227ceac | 378 | struct iwl_traffic_load *tl = NULL; |
0c11b4de RR |
379 | |
380 | if (tid >= TID_MAX_LOAD_COUNT) | |
381 | return 0; | |
382 | ||
383 | tl = &(lq_data->load[tid]); | |
384 | ||
385 | curr_time -= curr_time % TID_ROUND_VALUE; | |
386 | ||
387 | if (!(tl->queue_count)) | |
388 | return 0; | |
389 | ||
390 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
391 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
392 | ||
393 | /* The history is too long: remove data that is older than */ | |
394 | /* TID_MAX_TIME_DIFF */ | |
395 | if (index >= TID_QUEUE_MAX_SIZE) | |
396 | rs_tl_rm_old_stats(tl, curr_time); | |
397 | ||
398 | return tl->total; | |
399 | } | |
400 | ||
c79dd5b5 | 401 | static void rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv, |
e227ceac | 402 | struct iwl_lq_sta *lq_data, u8 tid, |
4b7679a5 | 403 | struct ieee80211_sta *sta) |
0c11b4de | 404 | { |
ff550cb4 | 405 | if (rs_tl_get_load(lq_data, tid) > IWL_AGG_LOAD_THRESHOLD) { |
e1623446 | 406 | IWL_DEBUG_HT(priv, "Starting Tx agg: STA: %pM tid: %d\n", |
e174961c | 407 | sta->addr, tid); |
4b7679a5 | 408 | ieee80211_start_tx_ba_session(priv->hw, sta->addr, tid); |
0c11b4de RR |
409 | } |
410 | } | |
411 | ||
c79dd5b5 | 412 | static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
e227ceac | 413 | struct iwl_lq_sta *lq_data, |
4b7679a5 | 414 | struct ieee80211_sta *sta) |
0c11b4de RR |
415 | { |
416 | if ((tid < TID_MAX_LOAD_COUNT)) | |
417 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
418 | else if (tid == IWL_AGG_ALL_TID) | |
419 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) | |
420 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
421 | } | |
422 | ||
39e88504 | 423 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
fde0db31 | 424 | { |
3ac7f146 TW |
425 | return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
426 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
427 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK); | |
fde0db31 GC |
428 | } |
429 | ||
77626355 BC |
430 | /** |
431 | * rs_collect_tx_data - Update the success/failure sliding window | |
432 | * | |
433 | * We keep a sliding window of the last 62 packets transmitted | |
434 | * at this rate. window->data contains the bitmask of successful | |
435 | * packets. | |
436 | */ | |
e227ceac | 437 | static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, |
99556438 RR |
438 | int scale_index, s32 tpt, int retries, |
439 | int successes) | |
b481de9c | 440 | { |
e227ceac | 441 | struct iwl_rate_scale_data *window = NULL; |
39e88504 | 442 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
b481de9c ZY |
443 | s32 fail_count; |
444 | ||
dc2453ae TW |
445 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
446 | return -EINVAL; | |
b481de9c | 447 | |
77626355 | 448 | /* Select data for current tx bit rate */ |
b481de9c ZY |
449 | window = &(windows[scale_index]); |
450 | ||
77626355 BC |
451 | /* |
452 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
453 | * history window; anything older isn't really relevant any more. | |
454 | * If we have filled up the sliding window, drop the oldest attempt; | |
455 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
456 | * subtract "1" from the success counter (this is the main reason | |
457 | * we keep these bitmaps!). | |
458 | */ | |
99556438 | 459 | while (retries > 0) { |
39e88504 GC |
460 | if (window->counter >= IWL_RATE_MAX_WINDOW) { |
461 | ||
462 | /* remove earliest */ | |
463 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
464 | ||
99556438 RR |
465 | if (window->data & mask) { |
466 | window->data &= ~mask; | |
39e88504 | 467 | window->success_counter--; |
99556438 | 468 | } |
b481de9c | 469 | } |
b481de9c | 470 | |
99556438 RR |
471 | /* Increment frames-attempted counter */ |
472 | window->counter++; | |
473 | ||
474 | /* Shift bitmap by one frame (throw away oldest history), | |
475 | * OR in "1", and increment "success" if this | |
476 | * frame was successful. */ | |
90d7795e | 477 | window->data <<= 1; |
99556438 | 478 | if (successes > 0) { |
39e88504 | 479 | window->success_counter++; |
99556438 RR |
480 | window->data |= 0x1; |
481 | successes--; | |
482 | } | |
77626355 | 483 | |
99556438 | 484 | retries--; |
b481de9c ZY |
485 | } |
486 | ||
77626355 | 487 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
488 | if (window->counter > 0) |
489 | window->success_ratio = 128 * (100 * window->success_counter) | |
490 | / window->counter; | |
491 | else | |
492 | window->success_ratio = IWL_INVALID_VALUE; | |
493 | ||
494 | fail_count = window->counter - window->success_counter; | |
495 | ||
77626355 | 496 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
497 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
498 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
499 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
500 | else | |
501 | window->average_tpt = IWL_INVALID_VALUE; | |
502 | ||
77626355 | 503 | /* Tag this window as having been updated */ |
b481de9c ZY |
504 | window->stamp = jiffies; |
505 | ||
dc2453ae | 506 | return 0; |
b481de9c ZY |
507 | } |
508 | ||
77626355 BC |
509 | /* |
510 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
511 | */ | |
39e88504 | 512 | /* FIXME:RS:remove this function and put the flags statically in the table */ |
978785a3 TW |
513 | static u32 rate_n_flags_from_tbl(struct iwl_priv *priv, |
514 | struct iwl_scale_tbl_info *tbl, | |
515 | int index, u8 use_green) | |
b481de9c | 516 | { |
39e88504 GC |
517 | u32 rate_n_flags = 0; |
518 | ||
b481de9c | 519 | if (is_legacy(tbl->lq_type)) { |
1826dcc0 | 520 | rate_n_flags = iwl_rates[index].plcp; |
b481de9c | 521 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
39e88504 | 522 | rate_n_flags |= RATE_MCS_CCK_MSK; |
b481de9c | 523 | |
fde0db31 GC |
524 | } else if (is_Ht(tbl->lq_type)) { |
525 | if (index > IWL_LAST_OFDM_RATE) { | |
978785a3 | 526 | IWL_ERR(priv, "Invalid HT rate index %d\n", index); |
b481de9c | 527 | index = IWL_LAST_OFDM_RATE; |
fde0db31 | 528 | } |
39e88504 | 529 | rate_n_flags = RATE_MCS_HT_MSK; |
fde0db31 GC |
530 | |
531 | if (is_siso(tbl->lq_type)) | |
1826dcc0 | 532 | rate_n_flags |= iwl_rates[index].plcp_siso; |
fde0db31 | 533 | else if (is_mimo2(tbl->lq_type)) |
1826dcc0 | 534 | rate_n_flags |= iwl_rates[index].plcp_mimo2; |
fde0db31 | 535 | else |
1826dcc0 | 536 | rate_n_flags |= iwl_rates[index].plcp_mimo3; |
b481de9c | 537 | } else { |
978785a3 | 538 | IWL_ERR(priv, "Invalid tbl->lq_type %d\n", tbl->lq_type); |
b481de9c ZY |
539 | } |
540 | ||
39e88504 | 541 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & |
fde0db31 | 542 | RATE_MCS_ANT_ABC_MSK); |
b481de9c | 543 | |
39e88504 | 544 | if (is_Ht(tbl->lq_type)) { |
7aafef1c | 545 | if (tbl->is_ht40) { |
39e88504 GC |
546 | if (tbl->is_dup) |
547 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
548 | else | |
7aafef1c | 549 | rate_n_flags |= RATE_MCS_HT40_MSK; |
39e88504 GC |
550 | } |
551 | if (tbl->is_SGI) | |
552 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
553 | ||
554 | if (use_green) { | |
555 | rate_n_flags |= RATE_MCS_GF_MSK; | |
556 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
557 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
978785a3 | 558 | IWL_ERR(priv, "GF was set with SGI:SISO\n"); |
39e88504 GC |
559 | } |
560 | } | |
b481de9c | 561 | } |
39e88504 | 562 | return rate_n_flags; |
b481de9c ZY |
563 | } |
564 | ||
77626355 BC |
565 | /* |
566 | * Interpret uCode API's rate_n_flags format, | |
567 | * fill "search" or "active" tx mode table. | |
568 | */ | |
39e88504 | 569 | static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
8318d78a | 570 | enum ieee80211_band band, |
e227ceac | 571 | struct iwl_scale_tbl_info *tbl, |
b481de9c ZY |
572 | int *rate_idx) |
573 | { | |
39e88504 GC |
574 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
575 | u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); | |
576 | u8 mcs; | |
b481de9c | 577 | |
e7d326ac | 578 | *rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags); |
b481de9c | 579 | |
fde0db31 | 580 | if (*rate_idx == IWL_RATE_INVALID) { |
b481de9c | 581 | *rate_idx = -1; |
dc2453ae | 582 | return -EINVAL; |
b481de9c | 583 | } |
77626355 | 584 | tbl->is_SGI = 0; /* default legacy setup */ |
7aafef1c | 585 | tbl->is_ht40 = 0; |
b481de9c | 586 | tbl->is_dup = 0; |
fde0db31 GC |
587 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
588 | tbl->lq_type = LQ_NONE; | |
d6e93399 | 589 | tbl->max_search = IWL_MAX_SEARCH; |
b481de9c | 590 | |
77626355 | 591 | /* legacy rate format */ |
39e88504 | 592 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
fde0db31 | 593 | if (num_of_ant == 1) { |
8318d78a | 594 | if (band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
595 | tbl->lq_type = LQ_A; |
596 | else | |
597 | tbl->lq_type = LQ_G; | |
b481de9c | 598 | } |
fde0db31 | 599 | /* HT rate format */ |
b481de9c | 600 | } else { |
39e88504 | 601 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
b481de9c ZY |
602 | tbl->is_SGI = 1; |
603 | ||
7aafef1c | 604 | if ((rate_n_flags & RATE_MCS_HT40_MSK) || |
39e88504 | 605 | (rate_n_flags & RATE_MCS_DUP_MSK)) |
7aafef1c | 606 | tbl->is_ht40 = 1; |
b481de9c | 607 | |
39e88504 | 608 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
b481de9c | 609 | tbl->is_dup = 1; |
fde0db31 | 610 | |
39e88504 | 611 | mcs = rs_extract_rate(rate_n_flags); |
fde0db31 | 612 | |
39e88504 GC |
613 | /* SISO */ |
614 | if (mcs <= IWL_RATE_SISO_60M_PLCP) { | |
fde0db31 GC |
615 | if (num_of_ant == 1) |
616 | tbl->lq_type = LQ_SISO; /*else NONE*/ | |
617 | /* MIMO2 */ | |
39e88504 | 618 | } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
fde0db31 GC |
619 | if (num_of_ant == 2) |
620 | tbl->lq_type = LQ_MIMO2; | |
621 | /* MIMO3 */ | |
622 | } else { | |
d6e93399 MA |
623 | if (num_of_ant == 3) { |
624 | tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH; | |
fde0db31 | 625 | tbl->lq_type = LQ_MIMO3; |
d6e93399 | 626 | } |
fde0db31 | 627 | } |
b481de9c ZY |
628 | } |
629 | return 0; | |
630 | } | |
aade00ce GC |
631 | |
632 | /* switch to another antenna/antennas and return 1 */ | |
633 | /* if no other valid antenna found, return 0 */ | |
634 | static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, | |
e227ceac | 635 | struct iwl_scale_tbl_info *tbl) |
b481de9c | 636 | { |
aade00ce GC |
637 | u8 new_ant_type; |
638 | ||
639 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
640 | return 0; | |
641 | ||
642 | if (!rs_is_valid_ant(valid_ant, tbl->ant_type)) | |
643 | return 0; | |
644 | ||
645 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
646 | ||
647 | while ((new_ant_type != tbl->ant_type) && | |
648 | !rs_is_valid_ant(valid_ant, new_ant_type)) | |
649 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
650 | ||
651 | if (new_ant_type == tbl->ant_type) | |
652 | return 0; | |
653 | ||
654 | tbl->ant_type = new_ant_type; | |
655 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
656 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
657 | return 1; | |
b481de9c ZY |
658 | } |
659 | ||
b261793d DH |
660 | /** |
661 | * Green-field mode is valid if the station supports it and | |
662 | * there are no non-GF stations present in the BSS. | |
663 | */ | |
664 | static inline u8 rs_use_green(struct ieee80211_sta *sta, | |
fad95bf5 | 665 | struct iwl_ht_config *ht_conf) |
b481de9c | 666 | { |
b261793d DH |
667 | return (sta->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD) && |
668 | !(ht_conf->non_GF_STA_present); | |
b481de9c ZY |
669 | } |
670 | ||
671 | /** | |
672 | * rs_get_supported_rates - get the available rates | |
673 | * | |
674 | * if management frame or broadcast frame only return | |
675 | * basic available rates. | |
676 | * | |
677 | */ | |
e227ceac TW |
678 | static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
679 | struct ieee80211_hdr *hdr, | |
680 | enum iwl_table_type rate_type) | |
b481de9c | 681 | { |
eecd6e57 GC |
682 | if (hdr && is_multicast_ether_addr(hdr->addr1) && |
683 | lq_sta->active_rate_basic) | |
684 | return lq_sta->active_rate_basic; | |
685 | ||
686 | if (is_legacy(rate_type)) { | |
687 | return lq_sta->active_legacy_rate; | |
688 | } else { | |
b481de9c | 689 | if (is_siso(rate_type)) |
eecd6e57 | 690 | return lq_sta->active_siso_rate; |
fde0db31 | 691 | else if (is_mimo2(rate_type)) |
eecd6e57 | 692 | return lq_sta->active_mimo2_rate; |
b481de9c | 693 | else |
eecd6e57 | 694 | return lq_sta->active_mimo3_rate; |
c33104f0 | 695 | } |
b481de9c ZY |
696 | } |
697 | ||
bf403db8 EK |
698 | static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask, |
699 | int rate_type) | |
b481de9c ZY |
700 | { |
701 | u8 high = IWL_RATE_INVALID; | |
702 | u8 low = IWL_RATE_INVALID; | |
703 | ||
01ebd063 | 704 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
705 | * the rate table */ |
706 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
707 | int i; | |
708 | u32 mask; | |
709 | ||
710 | /* Find the previous rate that is in the rate mask */ | |
711 | i = index - 1; | |
712 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
713 | if (rate_mask & mask) { | |
714 | low = i; | |
715 | break; | |
716 | } | |
717 | } | |
718 | ||
719 | /* Find the next rate that is in the rate mask */ | |
720 | i = index + 1; | |
721 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
722 | if (rate_mask & mask) { | |
723 | high = i; | |
724 | break; | |
725 | } | |
726 | } | |
727 | ||
728 | return (high << 8) | low; | |
729 | } | |
730 | ||
731 | low = index; | |
732 | while (low != IWL_RATE_INVALID) { | |
1826dcc0 | 733 | low = iwl_rates[low].prev_rs; |
b481de9c ZY |
734 | if (low == IWL_RATE_INVALID) |
735 | break; | |
736 | if (rate_mask & (1 << low)) | |
737 | break; | |
e1623446 | 738 | IWL_DEBUG_RATE(priv, "Skipping masked lower rate: %d\n", low); |
b481de9c ZY |
739 | } |
740 | ||
741 | high = index; | |
742 | while (high != IWL_RATE_INVALID) { | |
1826dcc0 | 743 | high = iwl_rates[high].next_rs; |
b481de9c ZY |
744 | if (high == IWL_RATE_INVALID) |
745 | break; | |
746 | if (rate_mask & (1 << high)) | |
747 | break; | |
e1623446 | 748 | IWL_DEBUG_RATE(priv, "Skipping masked higher rate: %d\n", high); |
b481de9c ZY |
749 | } |
750 | ||
751 | return (high << 8) | low; | |
752 | } | |
753 | ||
e227ceac TW |
754 | static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta, |
755 | struct iwl_scale_tbl_info *tbl, | |
756 | u8 scale_index, u8 ht_possible) | |
b481de9c | 757 | { |
b481de9c ZY |
758 | s32 low; |
759 | u16 rate_mask; | |
760 | u16 high_low; | |
761 | u8 switch_to_legacy = 0; | |
c33104f0 | 762 | u8 is_green = lq_sta->is_green; |
2ff6578b | 763 | struct iwl_priv *priv = lq_sta->drv; |
b481de9c ZY |
764 | |
765 | /* check if we need to switch from HT to legacy rates. | |
766 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
767 | * are always supported (spec demand) */ | |
768 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
769 | switch_to_legacy = 1; | |
770 | scale_index = rs_ht_to_legacy[scale_index]; | |
8318d78a | 771 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
772 | tbl->lq_type = LQ_A; |
773 | else | |
774 | tbl->lq_type = LQ_G; | |
775 | ||
69fdb309 | 776 | if (num_of_ant(tbl->ant_type) > 1) |
2ff6578b WYG |
777 | tbl->ant_type = |
778 | first_antenna(priv->hw_params.valid_tx_ant); | |
b481de9c | 779 | |
7aafef1c | 780 | tbl->is_ht40 = 0; |
b481de9c | 781 | tbl->is_SGI = 0; |
d6e93399 | 782 | tbl->max_search = IWL_MAX_SEARCH; |
b481de9c ZY |
783 | } |
784 | ||
eecd6e57 | 785 | rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
b481de9c | 786 | |
77626355 | 787 | /* Mask with station rate restriction */ |
b481de9c | 788 | if (is_legacy(tbl->lq_type)) { |
77626355 | 789 | /* supp_rates has no CCK bits in A mode */ |
8318d78a | 790 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c | 791 | rate_mask = (u16)(rate_mask & |
c33104f0 | 792 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 793 | else |
c33104f0 | 794 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
795 | } |
796 | ||
77626355 | 797 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 798 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
39e88504 GC |
799 | low = scale_index; |
800 | goto out; | |
b481de9c ZY |
801 | } |
802 | ||
bf403db8 EK |
803 | high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask, |
804 | tbl->lq_type); | |
b481de9c ZY |
805 | low = high_low & 0xff; |
806 | ||
39e88504 GC |
807 | if (low == IWL_RATE_INVALID) |
808 | low = scale_index; | |
809 | ||
810 | out: | |
978785a3 | 811 | return rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green); |
b481de9c ZY |
812 | } |
813 | ||
77626355 BC |
814 | /* |
815 | * mac80211 sends us Tx status | |
816 | */ | |
4b7679a5 JB |
817 | static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband, |
818 | struct ieee80211_sta *sta, void *priv_sta, | |
e039fa4a | 819 | struct sk_buff *skb) |
b481de9c ZY |
820 | { |
821 | int status; | |
822 | u8 retries; | |
5027309b | 823 | int rs_index, mac_index, index = 0; |
417f114b | 824 | struct iwl_lq_sta *lq_sta = priv_sta; |
66c73db7 | 825 | struct iwl_link_quality_cmd *table; |
b481de9c | 826 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
4b7679a5 | 827 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
e039fa4a | 828 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e227ceac TW |
829 | struct iwl_rate_scale_data *window = NULL; |
830 | struct iwl_rate_scale_data *search_win = NULL; | |
5027309b | 831 | enum mac80211_rate_control_flags mac_flags; |
39e88504 | 832 | u32 tx_rate; |
e227ceac TW |
833 | struct iwl_scale_tbl_info tbl_type; |
834 | struct iwl_scale_tbl_info *curr_tbl, *search_tbl; | |
b481de9c | 835 | u8 active_index = 0; |
b481de9c ZY |
836 | s32 tpt = 0; |
837 | ||
e1623446 | 838 | IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n"); |
b481de9c | 839 | |
417f114b | 840 | if (!ieee80211_is_data(hdr->frame_control) || |
514d65c1 | 841 | info->flags & IEEE80211_TX_CTL_NO_ACK) |
b481de9c ZY |
842 | return; |
843 | ||
99556438 | 844 | /* This packet was aggregated but doesn't carry rate scale info */ |
e039fa4a JB |
845 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
846 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
99556438 RR |
847 | return; |
848 | ||
8fe72311 WYG |
849 | if (info->flags & IEEE80211_TX_STAT_AMPDU) |
850 | retries = 0; | |
851 | else | |
852 | retries = info->status.rates[0].count - 1; | |
b481de9c ZY |
853 | |
854 | if (retries > 15) | |
855 | retries = 15; | |
856 | ||
05c914fe | 857 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 858 | !lq_sta->ibss_sta_added) |
f4d6082d | 859 | goto out; |
b481de9c | 860 | |
c33104f0 TW |
861 | table = &lq_sta->lq; |
862 | active_index = lq_sta->active_tbl; | |
b481de9c | 863 | |
c33104f0 TW |
864 | curr_tbl = &(lq_sta->lq_info[active_index]); |
865 | search_tbl = &(lq_sta->lq_info[(1 - active_index)]); | |
e227ceac TW |
866 | window = (struct iwl_rate_scale_data *)&(curr_tbl->win[0]); |
867 | search_win = (struct iwl_rate_scale_data *)&(search_tbl->win[0]); | |
b481de9c | 868 | |
77626355 BC |
869 | /* |
870 | * Ignore this Tx frame response if its initial rate doesn't match | |
871 | * that of latest Link Quality command. There may be stragglers | |
872 | * from a previous Link Quality command, but we're no longer interested | |
873 | * in those; they're either from the "active" mode while we're trying | |
874 | * to check "search" mode, or a prior "search" mode after we've moved | |
875 | * to a new "search" mode (which might become the new "active" mode). | |
876 | */ | |
39e88504 GC |
877 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
878 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
4c424e4c RR |
879 | if (priv->band == IEEE80211_BAND_5GHZ) |
880 | rs_index -= IWL_FIRST_OFDM_RATE; | |
5027309b DH |
881 | mac_flags = info->status.rates[0].flags; |
882 | mac_index = info->status.rates[0].idx; | |
31513be8 DH |
883 | /* For HT packets, map MCS to PLCP */ |
884 | if (mac_flags & IEEE80211_TX_RC_MCS) { | |
885 | mac_index &= RATE_MCS_CODE_MSK; /* Remove # of streams */ | |
886 | if (mac_index >= (IWL_RATE_9M_INDEX - IWL_FIRST_OFDM_RATE)) | |
887 | mac_index++; | |
392a0baf DH |
888 | /* |
889 | * mac80211 HT index is always zero-indexed; we need to move | |
890 | * HT OFDM rates after CCK rates in 2.4 GHz band | |
891 | */ | |
892 | if (priv->band == IEEE80211_BAND_2GHZ) | |
893 | mac_index += IWL_FIRST_OFDM_RATE; | |
31513be8 | 894 | } |
4c424e4c | 895 | |
5027309b DH |
896 | if ((mac_index < 0) || |
897 | (tbl_type.is_SGI != !!(mac_flags & IEEE80211_TX_RC_SHORT_GI)) || | |
898 | (tbl_type.is_ht40 != !!(mac_flags & IEEE80211_TX_RC_40_MHZ_WIDTH)) || | |
899 | (tbl_type.is_dup != !!(mac_flags & IEEE80211_TX_RC_DUP_DATA)) || | |
e6a9854b | 900 | (tbl_type.ant_type != info->antenna_sel_tx) || |
5027309b DH |
901 | (!!(tx_rate & RATE_MCS_HT_MSK) != !!(mac_flags & IEEE80211_TX_RC_MCS)) || |
902 | (!!(tx_rate & RATE_MCS_GF_MSK) != !!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD)) || | |
31513be8 DH |
903 | (rs_index != mac_index)) { |
904 | IWL_DEBUG_RATE(priv, "initial rate %d does not match %d (0x%x)\n", mac_index, rs_index, tx_rate); | |
d5e49036 MA |
905 | /* the last LQ command could failed so the LQ in ucode not |
906 | * the same in driver sync up | |
907 | */ | |
7d049e5a AM |
908 | lq_sta->missed_rate_counter++; |
909 | if (lq_sta->missed_rate_counter > IWL_MISSED_RATE_MAX) { | |
910 | lq_sta->missed_rate_counter = 0; | |
911 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); | |
912 | } | |
f4d6082d | 913 | goto out; |
b481de9c ZY |
914 | } |
915 | ||
7d049e5a | 916 | lq_sta->missed_rate_counter = 0; |
77626355 | 917 | /* Update frame history window with "failure" for each Tx retry. */ |
b481de9c | 918 | while (retries) { |
77626355 BC |
919 | /* Look up the rate and other info used for each tx attempt. |
920 | * Each tx attempt steps one entry deeper in the rate table. */ | |
39e88504 GC |
921 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
922 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, | |
b481de9c ZY |
923 | &tbl_type, &rs_index); |
924 | ||
77626355 BC |
925 | /* If type matches "search" table, |
926 | * add failure to "search" history */ | |
b481de9c | 927 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 928 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
929 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
930 | if (search_tbl->expected_tpt) | |
931 | tpt = search_tbl->expected_tpt[rs_index]; | |
932 | else | |
933 | tpt = 0; | |
99556438 | 934 | rs_collect_tx_data(search_win, rs_index, tpt, 1, 0); |
77626355 BC |
935 | |
936 | /* Else if type matches "current/active" table, | |
937 | * add failure to "current/active" history */ | |
b481de9c | 938 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 939 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
940 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
941 | if (curr_tbl->expected_tpt) | |
942 | tpt = curr_tbl->expected_tpt[rs_index]; | |
943 | else | |
944 | tpt = 0; | |
99556438 | 945 | rs_collect_tx_data(window, rs_index, tpt, 1, 0); |
b481de9c | 946 | } |
77626355 BC |
947 | |
948 | /* If not searching for a new mode, increment failed counter | |
949 | * ... this helps determine when to start searching again */ | |
c33104f0 TW |
950 | if (lq_sta->stay_in_tbl) |
951 | lq_sta->total_failed++; | |
b481de9c ZY |
952 | --retries; |
953 | index++; | |
954 | ||
955 | } | |
956 | ||
77626355 BC |
957 | /* |
958 | * Find (by rate) the history window to update with final Tx attempt; | |
959 | * if Tx was successful first try, use original rate, | |
960 | * else look up the rate that was, finally, successful. | |
961 | */ | |
39e88504 | 962 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
12b96817 | 963 | lq_sta->last_rate_n_flags = tx_rate; |
39e88504 | 964 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); |
b481de9c | 965 | |
77626355 | 966 | /* Update frame history window with "success" if Tx got ACKed ... */ |
e039fa4a | 967 | status = !!(info->flags & IEEE80211_TX_STAT_ACK); |
b481de9c | 968 | |
77626355 BC |
969 | /* If type matches "search" table, |
970 | * add final tx status to "search" history */ | |
b481de9c | 971 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 972 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
973 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
974 | if (search_tbl->expected_tpt) | |
975 | tpt = search_tbl->expected_tpt[rs_index]; | |
976 | else | |
977 | tpt = 0; | |
df36c044 | 978 | if (info->flags & IEEE80211_TX_STAT_AMPDU) |
99556438 | 979 | rs_collect_tx_data(search_win, rs_index, tpt, |
e039fa4a JB |
980 | info->status.ampdu_ack_len, |
981 | info->status.ampdu_ack_map); | |
99556438 RR |
982 | else |
983 | rs_collect_tx_data(search_win, rs_index, tpt, | |
984 | 1, status); | |
77626355 BC |
985 | /* Else if type matches "current/active" table, |
986 | * add final tx status to "current/active" history */ | |
b481de9c | 987 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 988 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
989 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
990 | if (curr_tbl->expected_tpt) | |
991 | tpt = curr_tbl->expected_tpt[rs_index]; | |
992 | else | |
993 | tpt = 0; | |
df36c044 | 994 | if (info->flags & IEEE80211_TX_STAT_AMPDU) |
99556438 | 995 | rs_collect_tx_data(window, rs_index, tpt, |
e039fa4a JB |
996 | info->status.ampdu_ack_len, |
997 | info->status.ampdu_ack_map); | |
99556438 RR |
998 | else |
999 | rs_collect_tx_data(window, rs_index, tpt, | |
1000 | 1, status); | |
b481de9c ZY |
1001 | } |
1002 | ||
77626355 BC |
1003 | /* If not searching for new mode, increment success/failed counter |
1004 | * ... these help determine when to start searching again */ | |
c33104f0 | 1005 | if (lq_sta->stay_in_tbl) { |
df36c044 | 1006 | if (info->flags & IEEE80211_TX_STAT_AMPDU) { |
e039fa4a | 1007 | lq_sta->total_success += info->status.ampdu_ack_map; |
99556438 | 1008 | lq_sta->total_failed += |
e039fa4a | 1009 | (info->status.ampdu_ack_len - info->status.ampdu_ack_map); |
99556438 RR |
1010 | } else { |
1011 | if (status) | |
1012 | lq_sta->total_success++; | |
1013 | else | |
1014 | lq_sta->total_failed++; | |
1015 | } | |
b481de9c ZY |
1016 | } |
1017 | ||
77626355 | 1018 | /* See if there's a better rate or modulation mode to try. */ |
c338ba3c | 1019 | if (sta && sta->supp_rates[sband->band]) |
514d65c1 | 1020 | rs_rate_scale_perform(priv, skb, sta, lq_sta); |
f4d6082d | 1021 | out: |
b481de9c ZY |
1022 | return; |
1023 | } | |
1024 | ||
77626355 BC |
1025 | /* |
1026 | * Begin a period of staying with a selected modulation mode. | |
1027 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
1028 | * Set frame tx success limits according to legacy vs. high-throughput, | |
1029 | * and reset overall (spanning all rates) tx success history statistics. | |
1030 | * These control how long we stay using same modulation mode before | |
1031 | * searching for a new mode. | |
1032 | */ | |
bf403db8 | 1033 | static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, |
e227ceac | 1034 | struct iwl_lq_sta *lq_sta) |
b481de9c | 1035 | { |
e1623446 | 1036 | IWL_DEBUG_RATE(priv, "we are staying in the same table\n"); |
c33104f0 | 1037 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 1038 | if (is_legacy) { |
c33104f0 TW |
1039 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
1040 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
1041 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 1042 | } else { |
c33104f0 TW |
1043 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
1044 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
1045 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 1046 | } |
c33104f0 TW |
1047 | lq_sta->table_count = 0; |
1048 | lq_sta->total_failed = 0; | |
1049 | lq_sta->total_success = 0; | |
447fee70 | 1050 | lq_sta->flush_timer = jiffies; |
d6e93399 | 1051 | lq_sta->action_counter = 0; |
b481de9c ZY |
1052 | } |
1053 | ||
77626355 BC |
1054 | /* |
1055 | * Find correct throughput table for given mode of modulation | |
1056 | */ | |
e227ceac TW |
1057 | static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
1058 | struct iwl_scale_tbl_info *tbl) | |
b481de9c ZY |
1059 | { |
1060 | if (is_legacy(tbl->lq_type)) { | |
1061 | if (!is_a_band(tbl->lq_type)) | |
1062 | tbl->expected_tpt = expected_tpt_G; | |
1063 | else | |
1064 | tbl->expected_tpt = expected_tpt_A; | |
1065 | } else if (is_siso(tbl->lq_type)) { | |
7aafef1c | 1066 | if (tbl->is_ht40 && !lq_sta->is_dup) |
b481de9c ZY |
1067 | if (tbl->is_SGI) |
1068 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
1069 | else | |
1070 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
1071 | else if (tbl->is_SGI) | |
1072 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
1073 | else | |
1074 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
584a0f00 | 1075 | } else if (is_mimo2(tbl->lq_type)) { |
7aafef1c | 1076 | if (tbl->is_ht40 && !lq_sta->is_dup) |
584a0f00 WYG |
1077 | if (tbl->is_SGI) |
1078 | tbl->expected_tpt = expected_tpt_mimo2_40MHzSGI; | |
1079 | else | |
1080 | tbl->expected_tpt = expected_tpt_mimo2_40MHz; | |
1081 | else if (tbl->is_SGI) | |
1082 | tbl->expected_tpt = expected_tpt_mimo2_20MHzSGI; | |
1083 | else | |
1084 | tbl->expected_tpt = expected_tpt_mimo2_20MHz; | |
1085 | } else if (is_mimo3(tbl->lq_type)) { | |
7aafef1c | 1086 | if (tbl->is_ht40 && !lq_sta->is_dup) |
b481de9c | 1087 | if (tbl->is_SGI) |
584a0f00 | 1088 | tbl->expected_tpt = expected_tpt_mimo3_40MHzSGI; |
b481de9c | 1089 | else |
584a0f00 | 1090 | tbl->expected_tpt = expected_tpt_mimo3_40MHz; |
b481de9c | 1091 | else if (tbl->is_SGI) |
584a0f00 | 1092 | tbl->expected_tpt = expected_tpt_mimo3_20MHzSGI; |
b481de9c | 1093 | else |
584a0f00 | 1094 | tbl->expected_tpt = expected_tpt_mimo3_20MHz; |
b481de9c ZY |
1095 | } else |
1096 | tbl->expected_tpt = expected_tpt_G; | |
1097 | } | |
1098 | ||
77626355 BC |
1099 | /* |
1100 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1101 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1102 | * above the current measured throughput of "active" mode, to give new mode | |
1103 | * a fair chance to prove itself without too many challenges. | |
1104 | * | |
1105 | * This gets called when transitioning to more aggressive modulation | |
1106 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1107 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1108 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1109 | * bit rate will typically need to increase, but not if performance was bad. | |
1110 | */ | |
c79dd5b5 | 1111 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
e227ceac TW |
1112 | struct iwl_lq_sta *lq_sta, |
1113 | struct iwl_scale_tbl_info *tbl, /* "search" */ | |
f935a6da | 1114 | u16 rate_mask, s8 index) |
b481de9c | 1115 | { |
77626355 | 1116 | /* "active" values */ |
e227ceac | 1117 | struct iwl_scale_tbl_info *active_tbl = |
c33104f0 | 1118 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1119 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1120 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 BC |
1121 | |
1122 | /* expected "search" throughput */ | |
1123 | s32 *tpt_tbl = tbl->expected_tpt; | |
1124 | ||
1125 | s32 new_rate, high, low, start_hi; | |
b481de9c | 1126 | u16 high_low; |
f935a6da | 1127 | s8 rate = index; |
b481de9c ZY |
1128 | |
1129 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1130 | ||
1131 | for (; ;) { | |
bf403db8 EK |
1132 | high_low = rs_get_adjacent_rate(priv, rate, rate_mask, |
1133 | tbl->lq_type); | |
b481de9c ZY |
1134 | |
1135 | low = high_low & 0xff; | |
1136 | high = (high_low >> 8) & 0xff; | |
1137 | ||
77626355 BC |
1138 | /* |
1139 | * Lower the "search" bit rate, to give new "search" mode | |
1140 | * approximately the same throughput as "active" if: | |
1141 | * | |
1142 | * 1) "Active" mode has been working modestly well (but not | |
1143 | * great), and expected "search" throughput (under perfect | |
1144 | * conditions) at candidate rate is above the actual | |
1145 | * measured "active" throughput (but less than expected | |
1146 | * "active" throughput under perfect conditions). | |
1147 | * OR | |
1148 | * 2) "Active" mode has been working perfectly or very well | |
1149 | * and expected "search" throughput (under perfect | |
1150 | * conditions) at candidate rate is above expected | |
1151 | * "active" throughput (under perfect conditions). | |
1152 | */ | |
c33104f0 | 1153 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1154 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1155 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1156 | (tpt_tbl[rate] <= active_tpt))) || | |
1157 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1158 | (tpt_tbl[rate] > active_tpt))) { | |
1159 | ||
77626355 BC |
1160 | /* (2nd or later pass) |
1161 | * If we've already tried to raise the rate, and are | |
1162 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1163 | if (start_hi != IWL_RATE_INVALID) { |
1164 | new_rate = start_hi; | |
1165 | break; | |
1166 | } | |
77626355 | 1167 | |
b481de9c | 1168 | new_rate = rate; |
77626355 BC |
1169 | |
1170 | /* Loop again with lower rate */ | |
b481de9c ZY |
1171 | if (low != IWL_RATE_INVALID) |
1172 | rate = low; | |
77626355 BC |
1173 | |
1174 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1175 | else |
1176 | break; | |
77626355 BC |
1177 | |
1178 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1179 | } else { |
77626355 BC |
1180 | /* (2nd or later pass) |
1181 | * If we've already tried to lower the rate, and are | |
1182 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1183 | if (new_rate != IWL_RATE_INVALID) |
1184 | break; | |
77626355 BC |
1185 | |
1186 | /* Loop again with higher rate */ | |
b481de9c ZY |
1187 | else if (high != IWL_RATE_INVALID) { |
1188 | start_hi = high; | |
1189 | rate = high; | |
77626355 BC |
1190 | |
1191 | /* Higher rate not available, use the original */ | |
b481de9c | 1192 | } else { |
90d7795e | 1193 | new_rate = rate; |
b481de9c ZY |
1194 | break; |
1195 | } | |
1196 | } | |
1197 | } | |
1198 | ||
1199 | return new_rate; | |
1200 | } | |
b481de9c | 1201 | |
77626355 | 1202 | /* |
584a0f00 | 1203 | * Set up search table for MIMO2 |
77626355 | 1204 | */ |
fde0db31 | 1205 | static int rs_switch_to_mimo2(struct iwl_priv *priv, |
e227ceac | 1206 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1207 | struct ieee80211_conf *conf, |
4b7679a5 | 1208 | struct ieee80211_sta *sta, |
e227ceac | 1209 | struct iwl_scale_tbl_info *tbl, int index) |
b481de9c | 1210 | { |
b481de9c ZY |
1211 | u16 rate_mask; |
1212 | s32 rate; | |
c33104f0 | 1213 | s8 is_green = lq_sta->is_green; |
b481de9c | 1214 | |
de27e64e | 1215 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
b481de9c ZY |
1216 | return -1; |
1217 | ||
d9fe60de | 1218 | if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) |
00c5ae2f | 1219 | == WLAN_HT_CAP_SM_PS_STATIC) |
b481de9c ZY |
1220 | return -1; |
1221 | ||
77626355 | 1222 | /* Need both Tx chains/antennas to support MIMO */ |
aade00ce | 1223 | if (priv->hw_params.tx_chains_num < 2) |
b481de9c ZY |
1224 | return -1; |
1225 | ||
e1623446 | 1226 | IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO2\n"); |
39e88504 GC |
1227 | |
1228 | tbl->lq_type = LQ_MIMO2; | |
c33104f0 | 1229 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1230 | tbl->action = 0; |
d6e93399 | 1231 | tbl->max_search = IWL_MAX_SEARCH; |
39e88504 GC |
1232 | rate_mask = lq_sta->active_mimo2_rate; |
1233 | ||
7aafef1c WYG |
1234 | if (iwl_is_ht40_tx_allowed(priv, &sta->ht_cap)) |
1235 | tbl->is_ht40 = 1; | |
b481de9c | 1236 | else |
7aafef1c | 1237 | tbl->is_ht40 = 0; |
b481de9c | 1238 | |
eecd6e57 | 1239 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1240 | |
f935a6da | 1241 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1242 | |
e1623446 | 1243 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
584a0f00 WYG |
1244 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
1245 | IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", | |
1246 | rate, rate_mask); | |
1247 | return -1; | |
1248 | } | |
1249 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); | |
1250 | ||
1251 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", | |
1252 | tbl->current_rate, is_green); | |
1253 | return 0; | |
1254 | } | |
1255 | ||
1256 | /* | |
1257 | * Set up search table for MIMO3 | |
1258 | */ | |
1259 | static int rs_switch_to_mimo3(struct iwl_priv *priv, | |
1260 | struct iwl_lq_sta *lq_sta, | |
1261 | struct ieee80211_conf *conf, | |
1262 | struct ieee80211_sta *sta, | |
1263 | struct iwl_scale_tbl_info *tbl, int index) | |
1264 | { | |
1265 | u16 rate_mask; | |
1266 | s32 rate; | |
1267 | s8 is_green = lq_sta->is_green; | |
1268 | ||
1269 | if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) | |
1270 | return -1; | |
1271 | ||
1272 | if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) | |
1273 | == WLAN_HT_CAP_SM_PS_STATIC) | |
1274 | return -1; | |
1275 | ||
1276 | /* Need both Tx chains/antennas to support MIMO */ | |
1277 | if (priv->hw_params.tx_chains_num < 3) | |
1278 | return -1; | |
1279 | ||
1280 | IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO3\n"); | |
1281 | ||
1282 | tbl->lq_type = LQ_MIMO3; | |
1283 | tbl->is_dup = lq_sta->is_dup; | |
1284 | tbl->action = 0; | |
d6e93399 | 1285 | tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH; |
584a0f00 WYG |
1286 | rate_mask = lq_sta->active_mimo3_rate; |
1287 | ||
7aafef1c WYG |
1288 | if (iwl_is_ht40_tx_allowed(priv, &sta->ht_cap)) |
1289 | tbl->is_ht40 = 1; | |
584a0f00 | 1290 | else |
7aafef1c | 1291 | tbl->is_ht40 = 0; |
39e88504 | 1292 | |
584a0f00 WYG |
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; | |
d6e93399 | 1332 | tbl->max_search = IWL_MAX_SEARCH; |
39e88504 | 1333 | rate_mask = lq_sta->active_siso_rate; |
b481de9c | 1334 | |
7aafef1c WYG |
1335 | if (iwl_is_ht40_tx_allowed(priv, &sta->ht_cap)) |
1336 | tbl->is_ht40 = 1; | |
b481de9c | 1337 | else |
7aafef1c | 1338 | tbl->is_ht40 = 0; |
b481de9c | 1339 | |
b481de9c | 1340 | if (is_green) |
39e88504 | 1341 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ |
b481de9c | 1342 | |
eecd6e57 | 1343 | rs_set_expected_tpt_table(lq_sta, tbl); |
f935a6da | 1344 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1345 | |
e1623446 | 1346 | IWL_DEBUG_RATE(priv, "LQ: get best rate %d mask %X\n", rate, rate_mask); |
b481de9c | 1347 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
e1623446 | 1348 | IWL_DEBUG_RATE(priv, "can not switch with index %d rate mask %x\n", |
b481de9c ZY |
1349 | rate, rate_mask); |
1350 | return -1; | |
1351 | } | |
978785a3 | 1352 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
e1623446 | 1353 | IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1354 | tbl->current_rate, is_green); |
403ab56b | 1355 | return 0; |
b481de9c ZY |
1356 | } |
1357 | ||
77626355 BC |
1358 | /* |
1359 | * Try to switch to new modulation mode from legacy | |
1360 | */ | |
c79dd5b5 | 1361 | static int rs_move_legacy_other(struct iwl_priv *priv, |
e227ceac | 1362 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1363 | struct ieee80211_conf *conf, |
4b7679a5 | 1364 | struct ieee80211_sta *sta, |
b481de9c ZY |
1365 | int index) |
1366 | { | |
e227ceac TW |
1367 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1368 | struct iwl_scale_tbl_info *search_tbl = | |
1369 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1370 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
1371 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - | |
1372 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1373 | u8 start_action = tbl->action; |
fde0db31 | 1374 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1375 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
fde0db31 | 1376 | int ret = 0; |
d6e93399 | 1377 | u8 update_search_tbl_counter = 0; |
b481de9c | 1378 | |
46f9381a WYG |
1379 | if (!iwl_ht_enabled(priv)) |
1380 | /* stay in Legacy */ | |
1381 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; | |
3ad3b92a | 1382 | else if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE && |
46f9381a WYG |
1383 | tbl->action > IWL_LEGACY_SWITCH_SISO) |
1384 | tbl->action = IWL_LEGACY_SWITCH_SISO; | |
b481de9c | 1385 | for (; ;) { |
d6e93399 | 1386 | lq_sta->action_counter++; |
b481de9c | 1387 | switch (tbl->action) { |
3110bef7 GC |
1388 | case IWL_LEGACY_SWITCH_ANTENNA1: |
1389 | case IWL_LEGACY_SWITCH_ANTENNA2: | |
e1623446 | 1390 | IWL_DEBUG_RATE(priv, "LQ: Legacy toggle Antenna\n"); |
b481de9c | 1391 | |
3110bef7 GC |
1392 | if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 && |
1393 | tx_chains_num <= 1) || | |
1394 | (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 && | |
1395 | tx_chains_num <= 2)) | |
1396 | break; | |
1397 | ||
77626355 | 1398 | /* Don't change antenna if success has been great */ |
b481de9c ZY |
1399 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1400 | break; | |
77626355 | 1401 | |
77626355 | 1402 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1403 | memcpy(search_tbl, tbl, sz); |
1404 | ||
aade00ce GC |
1405 | if (rs_toggle_antenna(valid_tx_ant, |
1406 | &search_tbl->current_rate, search_tbl)) { | |
d6e93399 | 1407 | update_search_tbl_counter = 1; |
3110bef7 | 1408 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
aade00ce GC |
1409 | goto out; |
1410 | } | |
a5e8b505 | 1411 | break; |
b481de9c | 1412 | case IWL_LEGACY_SWITCH_SISO: |
e1623446 | 1413 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to SISO\n"); |
77626355 BC |
1414 | |
1415 | /* Set up search table to try SISO */ | |
b481de9c | 1416 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1417 | search_tbl->is_SGI = 0; |
c33104f0 | 1418 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1419 | search_tbl, index); |
dc2453ae | 1420 | if (!ret) { |
c33104f0 | 1421 | lq_sta->action_counter = 0; |
b481de9c | 1422 | goto out; |
dc2453ae | 1423 | } |
b481de9c ZY |
1424 | |
1425 | break; | |
3110bef7 GC |
1426 | case IWL_LEGACY_SWITCH_MIMO2_AB: |
1427 | case IWL_LEGACY_SWITCH_MIMO2_AC: | |
1428 | case IWL_LEGACY_SWITCH_MIMO2_BC: | |
e1623446 | 1429 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO2\n"); |
77626355 BC |
1430 | |
1431 | /* Set up search table to try MIMO */ | |
b481de9c | 1432 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1433 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1434 | |
1435 | if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AB) | |
1436 | search_tbl->ant_type = ANT_AB; | |
1437 | else if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AC) | |
1438 | search_tbl->ant_type = ANT_AC; | |
1439 | else | |
1440 | search_tbl->ant_type = ANT_BC; | |
1441 | ||
1442 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1443 | break; | |
1444 | ||
fde0db31 | 1445 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1446 | search_tbl, index); |
dc2453ae | 1447 | if (!ret) { |
c33104f0 | 1448 | lq_sta->action_counter = 0; |
b481de9c | 1449 | goto out; |
dc2453ae | 1450 | } |
b481de9c | 1451 | break; |
584a0f00 WYG |
1452 | |
1453 | case IWL_LEGACY_SWITCH_MIMO3_ABC: | |
1454 | IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO3\n"); | |
1455 | ||
1456 | /* Set up search table to try MIMO3 */ | |
1457 | memcpy(search_tbl, tbl, sz); | |
1458 | search_tbl->is_SGI = 0; | |
1459 | ||
1460 | search_tbl->ant_type = ANT_ABC; | |
1461 | ||
1462 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1463 | break; | |
1464 | ||
1465 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1466 | search_tbl, index); | |
1467 | if (!ret) { | |
1468 | lq_sta->action_counter = 0; | |
1469 | goto out; | |
1470 | } | |
1471 | break; | |
b481de9c ZY |
1472 | } |
1473 | tbl->action++; | |
584a0f00 | 1474 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1475 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; |
b481de9c ZY |
1476 | |
1477 | if (tbl->action == start_action) | |
1478 | break; | |
1479 | ||
1480 | } | |
3110bef7 | 1481 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1482 | return 0; |
1483 | ||
3110bef7 GC |
1484 | out: |
1485 | lq_sta->search_better_tbl = 1; | |
b481de9c | 1486 | tbl->action++; |
584a0f00 | 1487 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1488 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; |
d6e93399 MA |
1489 | if (update_search_tbl_counter) |
1490 | search_tbl->action = tbl->action; | |
b481de9c ZY |
1491 | return 0; |
1492 | ||
1493 | } | |
1494 | ||
77626355 BC |
1495 | /* |
1496 | * Try to switch to new modulation mode from SISO | |
1497 | */ | |
c79dd5b5 | 1498 | static int rs_move_siso_to_other(struct iwl_priv *priv, |
e227ceac | 1499 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1500 | struct ieee80211_conf *conf, |
4b7679a5 | 1501 | struct ieee80211_sta *sta, int index) |
b481de9c | 1502 | { |
c33104f0 | 1503 | u8 is_green = lq_sta->is_green; |
e227ceac TW |
1504 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1505 | struct iwl_scale_tbl_info *search_tbl = | |
1506 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1507 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
28e6f489 | 1508 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e227ceac TW |
1509 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1510 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1511 | u8 start_action = tbl->action; |
fde0db31 | 1512 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
3110bef7 | 1513 | u8 tx_chains_num = priv->hw_params.tx_chains_num; |
d6e93399 | 1514 | u8 update_search_tbl_counter = 0; |
fde0db31 | 1515 | int ret; |
b481de9c | 1516 | |
3ad3b92a | 1517 | if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE && |
46f9381a WYG |
1518 | tbl->action > IWL_SISO_SWITCH_ANTENNA2) { |
1519 | /* stay in SISO */ | |
1520 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; | |
1521 | } | |
b481de9c | 1522 | for (;;) { |
c33104f0 | 1523 | lq_sta->action_counter++; |
b481de9c | 1524 | switch (tbl->action) { |
3110bef7 GC |
1525 | case IWL_SISO_SWITCH_ANTENNA1: |
1526 | case IWL_SISO_SWITCH_ANTENNA2: | |
e1623446 | 1527 | IWL_DEBUG_RATE(priv, "LQ: SISO toggle Antenna\n"); |
3110bef7 GC |
1528 | |
1529 | if ((tbl->action == IWL_SISO_SWITCH_ANTENNA1 && | |
1530 | tx_chains_num <= 1) || | |
1531 | (tbl->action == IWL_SISO_SWITCH_ANTENNA2 && | |
1532 | tx_chains_num <= 2)) | |
1533 | break; | |
1534 | ||
b481de9c ZY |
1535 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1536 | break; | |
b481de9c ZY |
1537 | |
1538 | memcpy(search_tbl, tbl, sz); | |
aade00ce | 1539 | if (rs_toggle_antenna(valid_tx_ant, |
d6e93399 MA |
1540 | &search_tbl->current_rate, search_tbl)) { |
1541 | update_search_tbl_counter = 1; | |
aade00ce | 1542 | goto out; |
d6e93399 | 1543 | } |
a5e8b505 | 1544 | break; |
3110bef7 GC |
1545 | case IWL_SISO_SWITCH_MIMO2_AB: |
1546 | case IWL_SISO_SWITCH_MIMO2_AC: | |
1547 | case IWL_SISO_SWITCH_MIMO2_BC: | |
e1623446 | 1548 | IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO2\n"); |
b481de9c | 1549 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1550 | search_tbl->is_SGI = 0; |
3110bef7 GC |
1551 | |
1552 | if (tbl->action == IWL_SISO_SWITCH_MIMO2_AB) | |
1553 | search_tbl->ant_type = ANT_AB; | |
1554 | else if (tbl->action == IWL_SISO_SWITCH_MIMO2_AC) | |
1555 | search_tbl->ant_type = ANT_AC; | |
1556 | else | |
1557 | search_tbl->ant_type = ANT_BC; | |
1558 | ||
1559 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1560 | break; | |
1561 | ||
fde0db31 | 1562 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
270243a5 | 1563 | search_tbl, index); |
3110bef7 | 1564 | if (!ret) |
b481de9c ZY |
1565 | goto out; |
1566 | break; | |
1567 | case IWL_SISO_SWITCH_GI: | |
28e6f489 DH |
1568 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1569 | IEEE80211_HT_CAP_SGI_20)) | |
a9841013 | 1570 | break; |
28e6f489 DH |
1571 | if (tbl->is_ht40 && !(ht_cap->cap & |
1572 | IEEE80211_HT_CAP_SGI_40)) | |
a9841013 EG |
1573 | break; |
1574 | ||
e1623446 | 1575 | IWL_DEBUG_RATE(priv, "LQ: SISO toggle SGI/NGI\n"); |
0c11b4de | 1576 | |
b481de9c | 1577 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1578 | if (is_green) { |
1579 | if (!tbl->is_SGI) | |
1580 | break; | |
1581 | else | |
15b1687c WT |
1582 | IWL_ERR(priv, |
1583 | "SGI was set in GF+SISO\n"); | |
b481de9c | 1584 | } |
39e88504 | 1585 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1586 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
39e88504 GC |
1587 | if (tbl->is_SGI) { |
1588 | s32 tpt = lq_sta->last_tpt / 100; | |
1589 | if (tpt >= search_tbl->expected_tpt[index]) | |
1590 | break; | |
1591 | } | |
978785a3 TW |
1592 | search_tbl->current_rate = |
1593 | rate_n_flags_from_tbl(priv, search_tbl, | |
1594 | index, is_green); | |
d6e93399 | 1595 | update_search_tbl_counter = 1; |
b481de9c | 1596 | goto out; |
584a0f00 WYG |
1597 | case IWL_SISO_SWITCH_MIMO3_ABC: |
1598 | IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO3\n"); | |
1599 | memcpy(search_tbl, tbl, sz); | |
1600 | search_tbl->is_SGI = 0; | |
1601 | search_tbl->ant_type = ANT_ABC; | |
1602 | ||
1603 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1604 | break; | |
1605 | ||
1606 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1607 | search_tbl, index); | |
1608 | if (!ret) | |
1609 | goto out; | |
1610 | break; | |
b481de9c ZY |
1611 | } |
1612 | tbl->action++; | |
584a0f00 | 1613 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
3110bef7 | 1614 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
b481de9c ZY |
1615 | |
1616 | if (tbl->action == start_action) | |
1617 | break; | |
1618 | } | |
3110bef7 | 1619 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1620 | return 0; |
1621 | ||
1622 | out: | |
3110bef7 | 1623 | lq_sta->search_better_tbl = 1; |
b481de9c | 1624 | tbl->action++; |
584a0f00 | 1625 | if (tbl->action > IWL_SISO_SWITCH_MIMO3_ABC) |
3110bef7 | 1626 | tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
d6e93399 MA |
1627 | if (update_search_tbl_counter) |
1628 | search_tbl->action = tbl->action; | |
1629 | ||
b481de9c ZY |
1630 | return 0; |
1631 | } | |
1632 | ||
77626355 | 1633 | /* |
584a0f00 | 1634 | * Try to switch to new modulation mode from MIMO2 |
77626355 | 1635 | */ |
584a0f00 | 1636 | static int rs_move_mimo2_to_other(struct iwl_priv *priv, |
e227ceac | 1637 | struct iwl_lq_sta *lq_sta, |
270243a5 | 1638 | struct ieee80211_conf *conf, |
4b7679a5 | 1639 | struct ieee80211_sta *sta, int index) |
b481de9c | 1640 | { |
c33104f0 | 1641 | s8 is_green = lq_sta->is_green; |
e227ceac TW |
1642 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
1643 | struct iwl_scale_tbl_info *search_tbl = | |
1644 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
3110bef7 | 1645 | struct iwl_rate_scale_data *window = &(tbl->win[index]); |
28e6f489 | 1646 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e227ceac TW |
1647 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1648 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1649 | u8 start_action = tbl->action; |
3110bef7 GC |
1650 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1651 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
d6e93399 | 1652 | u8 update_search_tbl_counter = 0; |
aade00ce | 1653 | int ret; |
b481de9c | 1654 | |
3ad3b92a | 1655 | if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) && |
46f9381a WYG |
1656 | (tbl->action < IWL_MIMO2_SWITCH_SISO_A || |
1657 | tbl->action > IWL_MIMO2_SWITCH_SISO_C)) { | |
1658 | /* switch in SISO */ | |
1659 | tbl->action = IWL_MIMO2_SWITCH_SISO_A; | |
1660 | } | |
b481de9c | 1661 | for (;;) { |
c33104f0 | 1662 | lq_sta->action_counter++; |
b481de9c | 1663 | switch (tbl->action) { |
3110bef7 GC |
1664 | case IWL_MIMO2_SWITCH_ANTENNA1: |
1665 | case IWL_MIMO2_SWITCH_ANTENNA2: | |
584a0f00 | 1666 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle Antennas\n"); |
3110bef7 GC |
1667 | |
1668 | if (tx_chains_num <= 2) | |
1669 | break; | |
1670 | ||
1671 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1672 | break; | |
1673 | ||
1674 | memcpy(search_tbl, tbl, sz); | |
1675 | if (rs_toggle_antenna(valid_tx_ant, | |
d6e93399 MA |
1676 | &search_tbl->current_rate, search_tbl)) { |
1677 | update_search_tbl_counter = 1; | |
3110bef7 | 1678 | goto out; |
d6e93399 | 1679 | } |
3110bef7 GC |
1680 | break; |
1681 | case IWL_MIMO2_SWITCH_SISO_A: | |
1682 | case IWL_MIMO2_SWITCH_SISO_B: | |
1683 | case IWL_MIMO2_SWITCH_SISO_C: | |
e1623446 | 1684 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to SISO\n"); |
0c11b4de | 1685 | |
77626355 | 1686 | /* Set up new search table for SISO */ |
b481de9c | 1687 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1688 | |
3110bef7 | 1689 | if (tbl->action == IWL_MIMO2_SWITCH_SISO_A) |
fde0db31 | 1690 | search_tbl->ant_type = ANT_A; |
3110bef7 | 1691 | else if (tbl->action == IWL_MIMO2_SWITCH_SISO_B) |
fde0db31 | 1692 | search_tbl->ant_type = ANT_B; |
3110bef7 GC |
1693 | else |
1694 | search_tbl->ant_type = ANT_C; | |
1695 | ||
1696 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1697 | break; | |
b481de9c | 1698 | |
c33104f0 | 1699 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1700 | search_tbl, index); |
3110bef7 | 1701 | if (!ret) |
b481de9c | 1702 | goto out; |
3110bef7 | 1703 | |
b481de9c ZY |
1704 | break; |
1705 | ||
3110bef7 | 1706 | case IWL_MIMO2_SWITCH_GI: |
28e6f489 DH |
1707 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1708 | IEEE80211_HT_CAP_SGI_20)) | |
a9841013 | 1709 | break; |
28e6f489 DH |
1710 | if (tbl->is_ht40 && !(ht_cap->cap & |
1711 | IEEE80211_HT_CAP_SGI_40)) | |
a9841013 EG |
1712 | break; |
1713 | ||
584a0f00 | 1714 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle SGI/NGI\n"); |
77626355 | 1715 | |
584a0f00 | 1716 | /* Set up new search table for MIMO2 */ |
b481de9c | 1717 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1718 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1719 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
77626355 BC |
1720 | /* |
1721 | * If active table already uses the fastest possible | |
1722 | * modulation (dual stream with short guard interval), | |
1723 | * and it's working well, there's no need to look | |
1724 | * for a better type of modulation! | |
1725 | */ | |
39e88504 | 1726 | if (tbl->is_SGI) { |
c33104f0 | 1727 | s32 tpt = lq_sta->last_tpt / 100; |
39e88504 GC |
1728 | if (tpt >= search_tbl->expected_tpt[index]) |
1729 | break; | |
b481de9c | 1730 | } |
978785a3 TW |
1731 | search_tbl->current_rate = |
1732 | rate_n_flags_from_tbl(priv, search_tbl, | |
1733 | index, is_green); | |
d6e93399 | 1734 | update_search_tbl_counter = 1; |
b481de9c ZY |
1735 | goto out; |
1736 | ||
584a0f00 WYG |
1737 | case IWL_MIMO2_SWITCH_MIMO3_ABC: |
1738 | IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to MIMO3\n"); | |
1739 | memcpy(search_tbl, tbl, sz); | |
1740 | search_tbl->is_SGI = 0; | |
1741 | search_tbl->ant_type = ANT_ABC; | |
1742 | ||
1743 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1744 | break; | |
1745 | ||
1746 | ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, | |
1747 | search_tbl, index); | |
1748 | if (!ret) | |
1749 | goto out; | |
1750 | ||
1751 | break; | |
b481de9c ZY |
1752 | } |
1753 | tbl->action++; | |
584a0f00 | 1754 | if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC) |
3110bef7 | 1755 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; |
b481de9c ZY |
1756 | |
1757 | if (tbl->action == start_action) | |
1758 | break; | |
1759 | } | |
3110bef7 | 1760 | search_tbl->lq_type = LQ_NONE; |
b481de9c ZY |
1761 | return 0; |
1762 | out: | |
3110bef7 | 1763 | lq_sta->search_better_tbl = 1; |
b481de9c | 1764 | tbl->action++; |
584a0f00 | 1765 | if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC) |
3110bef7 | 1766 | tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; |
d6e93399 MA |
1767 | if (update_search_tbl_counter) |
1768 | search_tbl->action = tbl->action; | |
1769 | ||
b481de9c ZY |
1770 | return 0; |
1771 | ||
1772 | } | |
1773 | ||
584a0f00 WYG |
1774 | /* |
1775 | * Try to switch to new modulation mode from MIMO3 | |
1776 | */ | |
1777 | static int rs_move_mimo3_to_other(struct iwl_priv *priv, | |
1778 | struct iwl_lq_sta *lq_sta, | |
1779 | struct ieee80211_conf *conf, | |
1780 | struct ieee80211_sta *sta, int index) | |
1781 | { | |
1782 | s8 is_green = lq_sta->is_green; | |
1783 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
1784 | struct iwl_scale_tbl_info *search_tbl = | |
1785 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); | |
1786 | struct iwl_rate_scale_data *window = &(tbl->win[index]); | |
28e6f489 | 1787 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
584a0f00 WYG |
1788 | u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
1789 | (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); | |
1790 | u8 start_action = tbl->action; | |
1791 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; | |
1792 | u8 tx_chains_num = priv->hw_params.tx_chains_num; | |
1793 | int ret; | |
d6e93399 | 1794 | u8 update_search_tbl_counter = 0; |
584a0f00 | 1795 | |
3ad3b92a | 1796 | if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) && |
46f9381a WYG |
1797 | (tbl->action < IWL_MIMO3_SWITCH_SISO_A || |
1798 | tbl->action > IWL_MIMO3_SWITCH_SISO_C)) { | |
1799 | /* switch in SISO */ | |
1800 | tbl->action = IWL_MIMO3_SWITCH_SISO_A; | |
1801 | } | |
584a0f00 WYG |
1802 | for (;;) { |
1803 | lq_sta->action_counter++; | |
1804 | switch (tbl->action) { | |
1805 | case IWL_MIMO3_SWITCH_ANTENNA1: | |
1806 | case IWL_MIMO3_SWITCH_ANTENNA2: | |
1807 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle Antennas\n"); | |
1808 | ||
1809 | if (tx_chains_num <= 3) | |
1810 | break; | |
1811 | ||
1812 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) | |
1813 | break; | |
1814 | ||
1815 | memcpy(search_tbl, tbl, sz); | |
1816 | if (rs_toggle_antenna(valid_tx_ant, | |
1817 | &search_tbl->current_rate, search_tbl)) | |
1818 | goto out; | |
1819 | break; | |
1820 | case IWL_MIMO3_SWITCH_SISO_A: | |
1821 | case IWL_MIMO3_SWITCH_SISO_B: | |
1822 | case IWL_MIMO3_SWITCH_SISO_C: | |
1823 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to SISO\n"); | |
1824 | ||
1825 | /* Set up new search table for SISO */ | |
1826 | memcpy(search_tbl, tbl, sz); | |
1827 | ||
1828 | if (tbl->action == IWL_MIMO3_SWITCH_SISO_A) | |
1829 | search_tbl->ant_type = ANT_A; | |
1830 | else if (tbl->action == IWL_MIMO3_SWITCH_SISO_B) | |
1831 | search_tbl->ant_type = ANT_B; | |
1832 | else | |
1833 | search_tbl->ant_type = ANT_C; | |
1834 | ||
1835 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1836 | break; | |
1837 | ||
1838 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, | |
1839 | search_tbl, index); | |
1840 | if (!ret) | |
1841 | goto out; | |
1842 | ||
1843 | break; | |
1844 | ||
1845 | case IWL_MIMO3_SWITCH_MIMO2_AB: | |
1846 | case IWL_MIMO3_SWITCH_MIMO2_AC: | |
1847 | case IWL_MIMO3_SWITCH_MIMO2_BC: | |
1848 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to MIMO2\n"); | |
1849 | ||
1850 | memcpy(search_tbl, tbl, sz); | |
1851 | search_tbl->is_SGI = 0; | |
1852 | if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AB) | |
1853 | search_tbl->ant_type = ANT_AB; | |
1854 | else if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AC) | |
1855 | search_tbl->ant_type = ANT_AC; | |
1856 | else | |
1857 | search_tbl->ant_type = ANT_BC; | |
1858 | ||
1859 | if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) | |
1860 | break; | |
1861 | ||
1862 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, | |
1863 | search_tbl, index); | |
1864 | if (!ret) | |
1865 | goto out; | |
1866 | ||
1867 | break; | |
1868 | ||
1869 | case IWL_MIMO3_SWITCH_GI: | |
28e6f489 DH |
1870 | if (!tbl->is_ht40 && !(ht_cap->cap & |
1871 | IEEE80211_HT_CAP_SGI_20)) | |
584a0f00 | 1872 | break; |
28e6f489 DH |
1873 | if (tbl->is_ht40 && !(ht_cap->cap & |
1874 | IEEE80211_HT_CAP_SGI_40)) | |
584a0f00 WYG |
1875 | break; |
1876 | ||
1877 | IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle SGI/NGI\n"); | |
1878 | ||
1879 | /* Set up new search table for MIMO */ | |
1880 | memcpy(search_tbl, tbl, sz); | |
1881 | search_tbl->is_SGI = !tbl->is_SGI; | |
1882 | rs_set_expected_tpt_table(lq_sta, search_tbl); | |
1883 | /* | |
1884 | * If active table already uses the fastest possible | |
1885 | * modulation (dual stream with short guard interval), | |
1886 | * and it's working well, there's no need to look | |
1887 | * for a better type of modulation! | |
1888 | */ | |
1889 | if (tbl->is_SGI) { | |
1890 | s32 tpt = lq_sta->last_tpt / 100; | |
1891 | if (tpt >= search_tbl->expected_tpt[index]) | |
1892 | break; | |
1893 | } | |
1894 | search_tbl->current_rate = | |
1895 | rate_n_flags_from_tbl(priv, search_tbl, | |
1896 | index, is_green); | |
d6e93399 | 1897 | update_search_tbl_counter = 1; |
584a0f00 WYG |
1898 | goto out; |
1899 | } | |
1900 | tbl->action++; | |
1901 | if (tbl->action > IWL_MIMO3_SWITCH_GI) | |
1902 | tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; | |
1903 | ||
1904 | if (tbl->action == start_action) | |
1905 | break; | |
1906 | } | |
1907 | search_tbl->lq_type = LQ_NONE; | |
1908 | return 0; | |
1909 | out: | |
1910 | lq_sta->search_better_tbl = 1; | |
1911 | tbl->action++; | |
1912 | if (tbl->action > IWL_MIMO3_SWITCH_GI) | |
1913 | tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; | |
d6e93399 MA |
1914 | if (update_search_tbl_counter) |
1915 | search_tbl->action = tbl->action; | |
1916 | ||
584a0f00 WYG |
1917 | return 0; |
1918 | ||
1919 | } | |
1920 | ||
77626355 BC |
1921 | /* |
1922 | * Check whether we should continue using same modulation mode, or | |
1923 | * begin search for a new mode, based on: | |
1924 | * 1) # tx successes or failures while using this mode | |
1925 | * 2) # times calling this function | |
1926 | * 3) elapsed time in this mode (not used, for now) | |
1927 | */ | |
e227ceac | 1928 | static void rs_stay_in_table(struct iwl_lq_sta *lq_sta) |
b481de9c | 1929 | { |
e227ceac | 1930 | struct iwl_scale_tbl_info *tbl; |
b481de9c ZY |
1931 | int i; |
1932 | int active_tbl; | |
1933 | int flush_interval_passed = 0; | |
bf403db8 | 1934 | struct iwl_priv *priv; |
b481de9c | 1935 | |
bf403db8 | 1936 | priv = lq_sta->drv; |
c33104f0 | 1937 | active_tbl = lq_sta->active_tbl; |
b481de9c | 1938 | |
c33104f0 | 1939 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 1940 | |
77626355 | 1941 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 1942 | if (lq_sta->stay_in_tbl) { |
b481de9c | 1943 | |
77626355 | 1944 | /* Elapsed time using current modulation mode */ |
c33104f0 | 1945 | if (lq_sta->flush_timer) |
b481de9c | 1946 | flush_interval_passed = |
447fee70 MA |
1947 | time_after(jiffies, |
1948 | (unsigned long)(lq_sta->flush_timer + | |
b481de9c ZY |
1949 | IWL_RATE_SCALE_FLUSH_INTVL)); |
1950 | ||
77626355 BC |
1951 | /* |
1952 | * Check if we should allow search for new modulation mode. | |
1953 | * If many frames have failed or succeeded, or we've used | |
1954 | * this same modulation for a long time, allow search, and | |
1955 | * reset history stats that keep track of whether we should | |
1956 | * allow a new search. Also (below) reset all bitmaps and | |
1957 | * stats in active history. | |
1958 | */ | |
c33104f0 TW |
1959 | if ((lq_sta->total_failed > lq_sta->max_failure_limit) || |
1960 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1961 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c | 1962 | && (flush_interval_passed))) { |
e1623446 | 1963 | IWL_DEBUG_RATE(priv, "LQ: stay is expired %d %d %d\n:", |
c33104f0 TW |
1964 | lq_sta->total_failed, |
1965 | lq_sta->total_success, | |
b481de9c | 1966 | flush_interval_passed); |
77626355 BC |
1967 | |
1968 | /* Allow search for new mode */ | |
c33104f0 TW |
1969 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
1970 | lq_sta->total_failed = 0; | |
1971 | lq_sta->total_success = 0; | |
1972 | lq_sta->flush_timer = 0; | |
77626355 BC |
1973 | |
1974 | /* | |
1975 | * Else if we've used this modulation mode enough repetitions | |
1976 | * (regardless of elapsed time or success/failure), reset | |
1977 | * history bitmaps and rate-specific stats for all rates in | |
1978 | * active table. | |
1979 | */ | |
403ab56b | 1980 | } else { |
c33104f0 TW |
1981 | lq_sta->table_count++; |
1982 | if (lq_sta->table_count >= | |
1983 | lq_sta->table_count_limit) { | |
1984 | lq_sta->table_count = 0; | |
b481de9c | 1985 | |
e1623446 | 1986 | IWL_DEBUG_RATE(priv, "LQ: stay in table clear win\n"); |
b481de9c ZY |
1987 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1988 | rs_rate_scale_clear_window( | |
1989 | &(tbl->win[i])); | |
1990 | } | |
1991 | } | |
1992 | ||
77626355 BC |
1993 | /* If transitioning to allow "search", reset all history |
1994 | * bitmaps and stats in active table (this will become the new | |
1995 | * "search" table). */ | |
c33104f0 | 1996 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
1997 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1998 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1999 | } | |
2000 | } | |
2001 | } | |
2002 | ||
e3139fe7 WYG |
2003 | /* |
2004 | * setup rate table in uCode | |
2005 | * return rate_n_flags as used in the table | |
2006 | */ | |
2007 | static u32 rs_update_rate_tbl(struct iwl_priv *priv, | |
2008 | struct iwl_lq_sta *lq_sta, | |
2009 | struct iwl_scale_tbl_info *tbl, | |
2010 | int index, u8 is_green) | |
2011 | { | |
2012 | u32 rate; | |
2013 | ||
2014 | /* Update uCode's rate table. */ | |
2015 | rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); | |
2016 | rs_fill_link_cmd(priv, lq_sta, rate); | |
2017 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); | |
2018 | ||
2019 | return rate; | |
2020 | } | |
2021 | ||
77626355 BC |
2022 | /* |
2023 | * Do rate scaling and search for new modulation mode. | |
2024 | */ | |
c79dd5b5 | 2025 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
514d65c1 | 2026 | struct sk_buff *skb, |
4b7679a5 JB |
2027 | struct ieee80211_sta *sta, |
2028 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 2029 | { |
4b7679a5 | 2030 | struct ieee80211_hw *hw = priv->hw; |
270243a5 | 2031 | struct ieee80211_conf *conf = &hw->conf; |
514d65c1 GS |
2032 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
2033 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
b481de9c ZY |
2034 | int low = IWL_RATE_INVALID; |
2035 | int high = IWL_RATE_INVALID; | |
2036 | int index; | |
2037 | int i; | |
e227ceac | 2038 | struct iwl_rate_scale_data *window = NULL; |
b481de9c ZY |
2039 | int current_tpt = IWL_INVALID_VALUE; |
2040 | int low_tpt = IWL_INVALID_VALUE; | |
2041 | int high_tpt = IWL_INVALID_VALUE; | |
2042 | u32 fail_count; | |
2043 | s8 scale_action = 0; | |
fd7c8a40 | 2044 | u16 rate_mask; |
b481de9c | 2045 | u8 update_lq = 0; |
e227ceac | 2046 | struct iwl_scale_tbl_info *tbl, *tbl1; |
b481de9c | 2047 | u16 rate_scale_index_msk = 0; |
39e88504 | 2048 | u32 rate; |
b481de9c ZY |
2049 | u8 is_green = 0; |
2050 | u8 active_tbl = 0; | |
2051 | u8 done_search = 0; | |
2052 | u16 high_low; | |
a5e8b505 | 2053 | s32 sr; |
0c11b4de | 2054 | u8 tid = MAX_TID_COUNT; |
86b4766b | 2055 | struct iwl_tid_data *tid_data; |
b481de9c | 2056 | |
e1623446 | 2057 | IWL_DEBUG_RATE(priv, "rate scale calculate new rate for skb\n"); |
b481de9c | 2058 | |
514d65c1 | 2059 | /* Send management frames and NO_ACK data using lowest rate. */ |
417f114b TW |
2060 | /* TODO: this could probably be improved.. */ |
2061 | if (!ieee80211_is_data(hdr->frame_control) || | |
514d65c1 | 2062 | info->flags & IEEE80211_TX_CTL_NO_ACK) |
b481de9c | 2063 | return; |
b481de9c | 2064 | |
4b7679a5 | 2065 | if (!sta || !lq_sta) |
b481de9c ZY |
2066 | return; |
2067 | ||
4b7679a5 | 2068 | lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; |
b481de9c | 2069 | |
faa29718 RR |
2070 | tid = rs_tl_add_packet(lq_sta, hdr); |
2071 | ||
77626355 BC |
2072 | /* |
2073 | * Select rate-scale / modulation-mode table to work with in | |
2074 | * the rest of this function: "search" if searching for better | |
2075 | * modulation mode, or "active" if doing rate scaling within a mode. | |
2076 | */ | |
c33104f0 TW |
2077 | if (!lq_sta->search_better_tbl) |
2078 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2079 | else |
c33104f0 | 2080 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2081 | |
c33104f0 | 2082 | tbl = &(lq_sta->lq_info[active_tbl]); |
2681b20b WYG |
2083 | if (is_legacy(tbl->lq_type)) |
2084 | lq_sta->is_green = 0; | |
2085 | else | |
b261793d | 2086 | lq_sta->is_green = rs_use_green(sta, &priv->current_ht_config); |
c33104f0 | 2087 | is_green = lq_sta->is_green; |
b481de9c | 2088 | |
77626355 | 2089 | /* current tx rate */ |
b7e35008 | 2090 | index = lq_sta->last_txrate_idx; |
b481de9c | 2091 | |
e1623446 | 2092 | IWL_DEBUG_RATE(priv, "Rate scale index %d for type %d\n", index, |
b481de9c ZY |
2093 | tbl->lq_type); |
2094 | ||
77626355 | 2095 | /* rates available for this association, and for modulation mode */ |
eecd6e57 | 2096 | rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
b481de9c | 2097 | |
e1623446 | 2098 | IWL_DEBUG_RATE(priv, "mask 0x%04X \n", rate_mask); |
b481de9c ZY |
2099 | |
2100 | /* mask with station rate restriction */ | |
2101 | if (is_legacy(tbl->lq_type)) { | |
8318d78a | 2102 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
77626355 | 2103 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 2104 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 2105 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
2106 | else |
2107 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 2108 | lq_sta->supp_rates); |
b481de9c ZY |
2109 | |
2110 | } else | |
2111 | rate_scale_index_msk = rate_mask; | |
2112 | ||
2113 | if (!rate_scale_index_msk) | |
2114 | rate_scale_index_msk = rate_mask; | |
2115 | ||
07bc28ed | 2116 | if (!((1 << index) & rate_scale_index_msk)) { |
15b1687c | 2117 | IWL_ERR(priv, "Current Rate is not valid\n"); |
e3139fe7 WYG |
2118 | if (lq_sta->search_better_tbl) { |
2119 | /* revert to active table if search table is not valid*/ | |
2120 | tbl->lq_type = LQ_NONE; | |
2121 | lq_sta->search_better_tbl = 0; | |
2122 | tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); | |
2123 | /* get "active" rate info */ | |
2124 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); | |
2125 | rate = rs_update_rate_tbl(priv, lq_sta, | |
2126 | tbl, index, is_green); | |
2127 | } | |
07bc28ed | 2128 | return; |
b481de9c ZY |
2129 | } |
2130 | ||
77626355 | 2131 | /* Get expected throughput table and history window for current rate */ |
07bc28ed | 2132 | if (!tbl->expected_tpt) { |
15b1687c | 2133 | IWL_ERR(priv, "tbl->expected_tpt is NULL\n"); |
07bc28ed GC |
2134 | return; |
2135 | } | |
b481de9c | 2136 | |
c6ec7a9b AM |
2137 | /* force user max rate if set by user */ |
2138 | if ((lq_sta->max_rate_idx != -1) && | |
2139 | (lq_sta->max_rate_idx < index)) { | |
2140 | index = lq_sta->max_rate_idx; | |
2141 | update_lq = 1; | |
2142 | window = &(tbl->win[index]); | |
2143 | goto lq_update; | |
2144 | } | |
2145 | ||
b481de9c ZY |
2146 | window = &(tbl->win[index]); |
2147 | ||
77626355 BC |
2148 | /* |
2149 | * If there is not enough history to calculate actual average | |
2150 | * throughput, keep analyzing results of more tx frames, without | |
2151 | * changing rate or mode (bypass most of the rest of this function). | |
2152 | * Set up new rate table in uCode only if old rate is not supported | |
2153 | * in current association (use new rate found above). | |
2154 | */ | |
b481de9c | 2155 | fail_count = window->counter - window->success_counter; |
07bc28ed GC |
2156 | if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
2157 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { | |
e1623446 | 2158 | IWL_DEBUG_RATE(priv, "LQ: still below TH. succ=%d total=%d " |
b481de9c ZY |
2159 | "for index %d\n", |
2160 | window->success_counter, window->counter, index); | |
77626355 BC |
2161 | |
2162 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 2163 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
2164 | |
2165 | /* Should we stay with this modulation mode, | |
2166 | * or search for a new one? */ | |
c33104f0 | 2167 | rs_stay_in_table(lq_sta); |
77626355 | 2168 | |
b481de9c | 2169 | goto out; |
3110bef7 | 2170 | } |
b481de9c | 2171 | |
77626355 BC |
2172 | /* Else we have enough samples; calculate estimate of |
2173 | * actual average throughput */ | |
3110bef7 GC |
2174 | |
2175 | BUG_ON(window->average_tpt != ((window->success_ratio * | |
2176 | tbl->expected_tpt[index] + 64) / 128)); | |
b481de9c | 2177 | |
77626355 | 2178 | /* If we are searching for better modulation mode, check success. */ |
46f9381a | 2179 | if (lq_sta->search_better_tbl && |
3ad3b92a | 2180 | (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI)) { |
77626355 BC |
2181 | /* If good success, continue using the "search" mode; |
2182 | * no need to send new link quality command, since we're | |
2183 | * continuing to use the setup that we've been trying. */ | |
07bc28ed GC |
2184 | if (window->average_tpt > lq_sta->last_tpt) { |
2185 | ||
e1623446 | 2186 | IWL_DEBUG_RATE(priv, "LQ: SWITCHING TO NEW TABLE " |
07bc28ed GC |
2187 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
2188 | window->success_ratio, | |
2189 | window->average_tpt, | |
2190 | lq_sta->last_tpt); | |
2191 | ||
2192 | if (!is_legacy(tbl->lq_type)) | |
c33104f0 | 2193 | lq_sta->enable_counter = 1; |
07bc28ed | 2194 | |
77626355 | 2195 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 2196 | lq_sta->active_tbl = active_tbl; |
b481de9c | 2197 | current_tpt = window->average_tpt; |
77626355 BC |
2198 | |
2199 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 2200 | } else { |
07bc28ed | 2201 | |
e1623446 | 2202 | IWL_DEBUG_RATE(priv, "LQ: GOING BACK TO THE OLD TABLE " |
07bc28ed GC |
2203 | "suc=%d cur-tpt=%d old-tpt=%d\n", |
2204 | window->success_ratio, | |
2205 | window->average_tpt, | |
2206 | lq_sta->last_tpt); | |
2207 | ||
77626355 | 2208 | /* Nullify "search" table */ |
b481de9c | 2209 | tbl->lq_type = LQ_NONE; |
77626355 BC |
2210 | |
2211 | /* Revert to "active" table */ | |
c33104f0 TW |
2212 | active_tbl = lq_sta->active_tbl; |
2213 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 2214 | |
77626355 | 2215 | /* Revert to "active" rate and throughput info */ |
e7d326ac | 2216 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
c33104f0 | 2217 | current_tpt = lq_sta->last_tpt; |
b481de9c | 2218 | |
77626355 | 2219 | /* Need to set up a new rate table in uCode */ |
b481de9c | 2220 | update_lq = 1; |
b481de9c | 2221 | } |
77626355 BC |
2222 | |
2223 | /* Either way, we've made a decision; modulation mode | |
2224 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 2225 | lq_sta->search_better_tbl = 0; |
77626355 | 2226 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
2227 | goto lq_update; |
2228 | } | |
2229 | ||
77626355 BC |
2230 | /* (Else) not in search of better modulation mode, try for better |
2231 | * starting rate, while staying in this mode. */ | |
bf403db8 | 2232 | high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk, |
b481de9c ZY |
2233 | tbl->lq_type); |
2234 | low = high_low & 0xff; | |
2235 | high = (high_low >> 8) & 0xff; | |
2236 | ||
c6ec7a9b AM |
2237 | /* If user set max rate, dont allow higher than user constrain */ |
2238 | if ((lq_sta->max_rate_idx != -1) && | |
2239 | (lq_sta->max_rate_idx < high)) | |
2240 | high = IWL_RATE_INVALID; | |
2241 | ||
a5e8b505 GC |
2242 | sr = window->success_ratio; |
2243 | ||
77626355 | 2244 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 2245 | current_tpt = window->average_tpt; |
b481de9c ZY |
2246 | if (low != IWL_RATE_INVALID) |
2247 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
2248 | if (high != IWL_RATE_INVALID) |
2249 | high_tpt = tbl->win[high].average_tpt; | |
2250 | ||
a5e8b505 | 2251 | scale_action = 0; |
b481de9c | 2252 | |
77626355 | 2253 | /* Too many failures, decrease rate */ |
a5e8b505 | 2254 | if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) { |
e1623446 | 2255 | IWL_DEBUG_RATE(priv, "decrease rate because of low success_ratio\n"); |
b481de9c | 2256 | scale_action = -1; |
77626355 BC |
2257 | |
2258 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c | 2259 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
a5e8b505 GC |
2260 | (high_tpt == IWL_INVALID_VALUE)) { |
2261 | ||
2262 | if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH) | |
2263 | scale_action = 1; | |
2264 | else if (low != IWL_RATE_INVALID) | |
8fe72311 | 2265 | scale_action = 0; |
a5e8b505 | 2266 | } |
77626355 BC |
2267 | |
2268 | /* Both adjacent throughputs are measured, but neither one has better | |
2269 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
2270 | else if ((low_tpt != IWL_INVALID_VALUE) && |
2271 | (high_tpt != IWL_INVALID_VALUE) && | |
2272 | (low_tpt < current_tpt) && | |
2273 | (high_tpt < current_tpt)) | |
2274 | scale_action = 0; | |
77626355 BC |
2275 | |
2276 | /* At least one adjacent rate's throughput is measured, | |
2277 | * and may have better performance. */ | |
b481de9c | 2278 | else { |
77626355 | 2279 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 2280 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 2281 | /* Higher rate has better throughput */ |
a5e8b505 GC |
2282 | if (high_tpt > current_tpt && |
2283 | sr >= IWL_RATE_INCREASE_TH) { | |
b481de9c | 2284 | scale_action = 1; |
a5e8b505 | 2285 | } else { |
8fe72311 | 2286 | scale_action = 0; |
b481de9c | 2287 | } |
77626355 BC |
2288 | |
2289 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 2290 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 2291 | /* Lower rate has better throughput */ |
b481de9c | 2292 | if (low_tpt > current_tpt) { |
e1623446 TW |
2293 | IWL_DEBUG_RATE(priv, |
2294 | "decrease rate because of low tpt\n"); | |
b481de9c | 2295 | scale_action = -1; |
a5e8b505 | 2296 | } else if (sr >= IWL_RATE_INCREASE_TH) { |
b481de9c | 2297 | scale_action = 1; |
a5e8b505 | 2298 | } |
b481de9c ZY |
2299 | } |
2300 | } | |
2301 | ||
77626355 BC |
2302 | /* Sanity check; asked for decrease, but success rate or throughput |
2303 | * has been good at old rate. Don't change it. */ | |
a5e8b505 GC |
2304 | if ((scale_action == -1) && (low != IWL_RATE_INVALID) && |
2305 | ((sr > IWL_RATE_HIGH_TH) || | |
b481de9c | 2306 | (current_tpt > (100 * tbl->expected_tpt[low])))) |
b481de9c | 2307 | scale_action = 0; |
46f9381a WYG |
2308 | if (!iwl_ht_enabled(priv) && !is_legacy(tbl->lq_type)) |
2309 | scale_action = -1; | |
3ad3b92a | 2310 | if (iwl_tx_ant_restriction(priv) != IWL_ANT_OK_MULTI && |
46f9381a WYG |
2311 | (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) |
2312 | scale_action = -1; | |
b481de9c ZY |
2313 | switch (scale_action) { |
2314 | case -1: | |
77626355 | 2315 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
2316 | if (low != IWL_RATE_INVALID) { |
2317 | update_lq = 1; | |
2318 | index = low; | |
2319 | } | |
447fee70 | 2320 | |
b481de9c ZY |
2321 | break; |
2322 | case 1: | |
77626355 | 2323 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
2324 | if (high != IWL_RATE_INVALID) { |
2325 | update_lq = 1; | |
2326 | index = high; | |
2327 | } | |
2328 | ||
2329 | break; | |
2330 | case 0: | |
77626355 | 2331 | /* No change */ |
b481de9c ZY |
2332 | default: |
2333 | break; | |
2334 | } | |
2335 | ||
e1623446 | 2336 | IWL_DEBUG_RATE(priv, "choose rate scale index %d action %d low %d " |
b481de9c ZY |
2337 | "high %d type %d\n", |
2338 | index, scale_action, low, high, tbl->lq_type); | |
2339 | ||
a5e8b505 | 2340 | lq_update: |
77626355 | 2341 | /* Replace uCode's rate table for the destination station. */ |
e3139fe7 WYG |
2342 | if (update_lq) |
2343 | rate = rs_update_rate_tbl(priv, lq_sta, | |
2344 | tbl, index, is_green); | |
77626355 | 2345 | |
3ad3b92a | 2346 | if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI) { |
46f9381a WYG |
2347 | /* Should we stay with this modulation mode, |
2348 | * or search for a new one? */ | |
2349 | rs_stay_in_table(lq_sta); | |
2350 | } | |
77626355 BC |
2351 | /* |
2352 | * Search for new modulation mode if we're: | |
2353 | * 1) Not changing rates right now | |
2354 | * 2) Not just finishing up a search | |
2355 | * 3) Allowing a new search | |
2356 | */ | |
47cfd463 | 2357 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl && window->counter) { |
77626355 | 2358 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 2359 | lq_sta->last_tpt = current_tpt; |
b481de9c | 2360 | |
77626355 BC |
2361 | /* Select a new "search" modulation mode to try. |
2362 | * If one is found, set up the new "search" table. */ | |
b481de9c | 2363 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 2364 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2365 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 2366 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
584a0f00 WYG |
2367 | else if (is_mimo2(tbl->lq_type)) |
2368 | rs_move_mimo2_to_other(priv, lq_sta, conf, sta, index); | |
b481de9c | 2369 | else |
584a0f00 | 2370 | rs_move_mimo3_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 2371 | |
77626355 | 2372 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 2373 | if (lq_sta->search_better_tbl) { |
77626355 | 2374 | /* Access the "search" table, clear its history. */ |
c33104f0 | 2375 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
2376 | for (i = 0; i < IWL_RATE_COUNT; i++) |
2377 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
2378 | ||
77626355 | 2379 | /* Use new "search" start rate */ |
e7d326ac | 2380 | index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
b481de9c | 2381 | |
e1623446 | 2382 | IWL_DEBUG_RATE(priv, "Switch current mcs: %X index: %d\n", |
39e88504 | 2383 | tbl->current_rate, index); |
07bc28ed | 2384 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
66c73db7 | 2385 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
447fee70 MA |
2386 | } else |
2387 | done_search = 1; | |
2388 | } | |
b481de9c | 2389 | |
447fee70 | 2390 | if (done_search && !lq_sta->stay_in_tbl) { |
77626355 BC |
2391 | /* If the "active" (non-search) mode was legacy, |
2392 | * and we've tried switching antennas, | |
2393 | * but we haven't been able to try HT modes (not available), | |
2394 | * stay with best antenna legacy modulation for a while | |
2395 | * before next round of mode comparisons. */ | |
c33104f0 | 2396 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
de27e64e | 2397 | if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) && |
d6e93399 | 2398 | lq_sta->action_counter > tbl1->max_search) { |
e1623446 | 2399 | IWL_DEBUG_RATE(priv, "LQ: STAY in legacy table\n"); |
bf403db8 | 2400 | rs_set_stay_in_table(priv, 1, lq_sta); |
b481de9c ZY |
2401 | } |
2402 | ||
77626355 BC |
2403 | /* If we're in an HT mode, and all 3 mode switch actions |
2404 | * have been tried and compared, stay in this best modulation | |
2405 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 | 2406 | if (lq_sta->enable_counter && |
46f9381a WYG |
2407 | (lq_sta->action_counter >= tbl1->max_search) && |
2408 | iwl_ht_enabled(priv)) { | |
0c11b4de RR |
2409 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
2410 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2411 | (tid != MAX_TID_COUNT)) { | |
86b4766b WYG |
2412 | tid_data = |
2413 | &priv->stations[lq_sta->lq.sta_id].tid[tid]; | |
2414 | if (tid_data->agg.state == IWL_AGG_OFF) { | |
2415 | IWL_DEBUG_RATE(priv, | |
2416 | "try to aggregate tid %d\n", | |
2417 | tid); | |
2418 | rs_tl_turn_on_agg(priv, tid, | |
2419 | lq_sta, sta); | |
2420 | } | |
b481de9c | 2421 | } |
bf403db8 | 2422 | rs_set_stay_in_table(priv, 0, lq_sta); |
b481de9c | 2423 | } |
b481de9c ZY |
2424 | } |
2425 | ||
2426 | out: | |
978785a3 | 2427 | tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); |
b481de9c | 2428 | i = index; |
b7e35008 | 2429 | lq_sta->last_txrate_idx = i; |
b481de9c | 2430 | |
b481de9c ZY |
2431 | return; |
2432 | } | |
2433 | ||
2434 | ||
c79dd5b5 | 2435 | static void rs_initialize_lq(struct iwl_priv *priv, |
270243a5 | 2436 | struct ieee80211_conf *conf, |
4b7679a5 JB |
2437 | struct ieee80211_sta *sta, |
2438 | struct iwl_lq_sta *lq_sta) | |
b481de9c | 2439 | { |
e227ceac | 2440 | struct iwl_scale_tbl_info *tbl; |
b481de9c | 2441 | int rate_idx; |
aade00ce | 2442 | int i; |
39e88504 | 2443 | u32 rate; |
b261793d | 2444 | u8 use_green = rs_use_green(sta, &priv->current_ht_config); |
aade00ce GC |
2445 | u8 active_tbl = 0; |
2446 | u8 valid_tx_ant; | |
b481de9c | 2447 | |
4b7679a5 | 2448 | if (!sta || !lq_sta) |
b481de9c ZY |
2449 | goto out; |
2450 | ||
b7e35008 | 2451 | i = lq_sta->last_txrate_idx; |
b481de9c | 2452 | |
c33104f0 | 2453 | if ((lq_sta->lq.sta_id == 0xff) && |
05c914fe | 2454 | (priv->iw_mode == NL80211_IFTYPE_ADHOC)) |
b481de9c ZY |
2455 | goto out; |
2456 | ||
aade00ce GC |
2457 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
2458 | ||
c33104f0 TW |
2459 | if (!lq_sta->search_better_tbl) |
2460 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2461 | else |
c33104f0 | 2462 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2463 | |
c33104f0 | 2464 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2465 | |
2466 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2467 | i = 0; | |
2468 | ||
1826dcc0 | 2469 | rate = iwl_rates[i].plcp; |
eb48dcaf WT |
2470 | tbl->ant_type = first_antenna(valid_tx_ant); |
2471 | rate |= tbl->ant_type << RATE_MCS_ANT_POS; | |
b481de9c ZY |
2472 | |
2473 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
39e88504 | 2474 | rate |= RATE_MCS_CCK_MSK; |
b481de9c | 2475 | |
39e88504 | 2476 | rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
aade00ce GC |
2477 | if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2478 | rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
b481de9c | 2479 | |
978785a3 | 2480 | rate = rate_n_flags_from_tbl(priv, tbl, rate_idx, use_green); |
39e88504 | 2481 | tbl->current_rate = rate; |
eecd6e57 | 2482 | rs_set_expected_tpt_table(lq_sta, tbl); |
07bc28ed | 2483 | rs_fill_link_cmd(NULL, lq_sta, rate); |
66c73db7 | 2484 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c ZY |
2485 | out: |
2486 | return; | |
2487 | } | |
2488 | ||
e6a9854b JB |
2489 | static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta, |
2490 | struct ieee80211_tx_rate_control *txrc) | |
b481de9c ZY |
2491 | { |
2492 | ||
e6a9854b JB |
2493 | struct sk_buff *skb = txrc->skb; |
2494 | struct ieee80211_supported_band *sband = txrc->sband; | |
4b7679a5 JB |
2495 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
2496 | struct ieee80211_conf *conf = &priv->hw->conf; | |
7869b0ea | 2497 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
b481de9c | 2498 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
e6a9854b | 2499 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
417f114b TW |
2500 | struct iwl_lq_sta *lq_sta = priv_sta; |
2501 | int rate_idx; | |
b481de9c | 2502 | |
e1623446 | 2503 | IWL_DEBUG_RATE_LIMIT(priv, "rate scale calculate new rate for skb\n"); |
b481de9c | 2504 | |
c6ec7a9b AM |
2505 | /* Get max rate if user set max rate */ |
2506 | if (lq_sta) { | |
2507 | lq_sta->max_rate_idx = txrc->max_rate_idx; | |
2508 | if ((sband->band == IEEE80211_BAND_5GHZ) && | |
2509 | (lq_sta->max_rate_idx != -1)) | |
2510 | lq_sta->max_rate_idx += IWL_FIRST_OFDM_RATE; | |
2511 | if ((lq_sta->max_rate_idx < 0) || | |
2512 | (lq_sta->max_rate_idx >= IWL_RATE_COUNT)) | |
2513 | lq_sta->max_rate_idx = -1; | |
2514 | } | |
2515 | ||
514d65c1 | 2516 | /* Send management frames and NO_ACK data using lowest rate. */ |
4c6d4f5c | 2517 | if (rate_control_send_low(sta, priv_sta, txrc)) |
4b7679a5 | 2518 | return; |
b481de9c | 2519 | |
417f114b | 2520 | rate_idx = lq_sta->last_txrate_idx; |
b481de9c | 2521 | |
05c914fe | 2522 | if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) && |
c33104f0 | 2523 | !lq_sta->ibss_sta_added) { |
c587de0b | 2524 | u8 sta_id = iwl_find_station(priv, hdr->addr1); |
b481de9c ZY |
2525 | |
2526 | if (sta_id == IWL_INVALID_STATION) { | |
e1623446 | 2527 | IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", |
e174961c | 2528 | hdr->addr1); |
c587de0b | 2529 | sta_id = iwl_add_station(priv, hdr->addr1, |
7869b0ea | 2530 | false, CMD_ASYNC, ht_cap); |
b481de9c ZY |
2531 | } |
2532 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2533 | lq_sta->lq.sta_id = sta_id; |
2534 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
2535 | lq_sta->ibss_sta_added = 1; | |
4b7679a5 | 2536 | rs_initialize_lq(priv, conf, sta, lq_sta); |
b481de9c | 2537 | } |
b481de9c ZY |
2538 | } |
2539 | ||
a9c146b3 | 2540 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) { |
417f114b | 2541 | rate_idx -= IWL_FIRST_OFDM_RATE; |
a9c146b3 WYG |
2542 | /* 6M and 9M shared same MCS index */ |
2543 | rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0; | |
2544 | if (rs_extract_rate(lq_sta->last_rate_n_flags) >= | |
2545 | IWL_RATE_MIMO3_6M_PLCP) | |
2546 | rate_idx = rate_idx + (2 * MCS_INDEX_PER_STREAM); | |
2547 | else if (rs_extract_rate(lq_sta->last_rate_n_flags) >= | |
2548 | IWL_RATE_MIMO2_6M_PLCP) | |
2549 | rate_idx = rate_idx + MCS_INDEX_PER_STREAM; | |
2550 | info->control.rates[0].flags = IEEE80211_TX_RC_MCS; | |
2551 | if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK) | |
2552 | info->control.rates[0].flags |= IEEE80211_TX_RC_SHORT_GI; | |
2553 | if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK) | |
2554 | info->control.rates[0].flags |= IEEE80211_TX_RC_DUP_DATA; | |
7aafef1c | 2555 | if (lq_sta->last_rate_n_flags & RATE_MCS_HT40_MSK) |
a9c146b3 WYG |
2556 | info->control.rates[0].flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; |
2557 | if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK) | |
2558 | info->control.rates[0].flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
2559 | } else { | |
5027309b DH |
2560 | /* Check for invalid rates */ |
2561 | if ((rate_idx < 0) || (rate_idx >= IWL_RATE_COUNT_LEGACY) || | |
2562 | ((sband->band == IEEE80211_BAND_5GHZ) && | |
2563 | (rate_idx < IWL_FIRST_OFDM_RATE))) | |
a9c146b3 | 2564 | rate_idx = rate_lowest_index(sband, sta); |
5027309b | 2565 | /* On valid 5 GHz rate, adjust index */ |
a9c146b3 WYG |
2566 | else if (sband->band == IEEE80211_BAND_5GHZ) |
2567 | rate_idx -= IWL_FIRST_OFDM_RATE; | |
7ebaeff8 | 2568 | info->control.rates[0].flags = 0; |
a9c146b3 | 2569 | } |
417f114b | 2570 | info->control.rates[0].idx = rate_idx; |
a9c146b3 | 2571 | |
b481de9c ZY |
2572 | } |
2573 | ||
4b7679a5 JB |
2574 | static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta, |
2575 | gfp_t gfp) | |
b481de9c | 2576 | { |
e227ceac | 2577 | struct iwl_lq_sta *lq_sta; |
bf403db8 | 2578 | struct iwl_priv *priv; |
b481de9c ZY |
2579 | int i, j; |
2580 | ||
bf403db8 | 2581 | priv = (struct iwl_priv *)priv_rate; |
e1623446 | 2582 | IWL_DEBUG_RATE(priv, "create station rate scale window\n"); |
b481de9c | 2583 | |
e227ceac | 2584 | lq_sta = kzalloc(sizeof(struct iwl_lq_sta), gfp); |
b481de9c | 2585 | |
c33104f0 | 2586 | if (lq_sta == NULL) |
b481de9c | 2587 | return NULL; |
c33104f0 | 2588 | lq_sta->lq.sta_id = 0xff; |
b481de9c | 2589 | |
63fddb9f | 2590 | |
b481de9c ZY |
2591 | for (j = 0; j < LQ_SIZE; j++) |
2592 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2593 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2594 | |
c33104f0 | 2595 | return lq_sta; |
b481de9c ZY |
2596 | } |
2597 | ||
4b7679a5 JB |
2598 | static void rs_rate_init(void *priv_r, struct ieee80211_supported_band *sband, |
2599 | struct ieee80211_sta *sta, void *priv_sta) | |
b481de9c ZY |
2600 | { |
2601 | int i, j; | |
4b7679a5 JB |
2602 | struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
2603 | struct ieee80211_conf *conf = &priv->hw->conf; | |
7869b0ea | 2604 | struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
e227ceac | 2605 | struct iwl_lq_sta *lq_sta = priv_sta; |
b481de9c | 2606 | |
c33104f0 | 2607 | lq_sta->flush_timer = 0; |
4b7679a5 | 2608 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
b481de9c ZY |
2609 | for (j = 0; j < LQ_SIZE; j++) |
2610 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
3ac7f146 | 2611 | rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
b481de9c | 2612 | |
e1623446 | 2613 | IWL_DEBUG_RATE(priv, "LQ: *** rate scale station global init ***\n"); |
b481de9c ZY |
2614 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2615 | * the lowest or the highest rate.. Could consider using RSSI from | |
2616 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2617 | * after assoc.. */ | |
2618 | ||
c33104f0 | 2619 | lq_sta->ibss_sta_added = 0; |
05c914fe | 2620 | if (priv->iw_mode == NL80211_IFTYPE_AP) { |
c587de0b | 2621 | u8 sta_id = iwl_find_station(priv, |
e11bc028 | 2622 | sta->addr); |
0795af57 | 2623 | |
b481de9c | 2624 | /* for IBSS the call are from tasklet */ |
e1623446 | 2625 | IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", sta->addr); |
b481de9c ZY |
2626 | |
2627 | if (sta_id == IWL_INVALID_STATION) { | |
e1623446 | 2628 | IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", sta->addr); |
c587de0b | 2629 | sta_id = iwl_add_station(priv, sta->addr, false, |
7869b0ea | 2630 | CMD_ASYNC, ht_cap); |
b481de9c ZY |
2631 | } |
2632 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2633 | lq_sta->lq.sta_id = sta_id; |
2634 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
b481de9c ZY |
2635 | } |
2636 | /* FIXME: this is w/a remove it later */ | |
2637 | priv->assoc_station_added = 1; | |
2638 | } | |
2639 | ||
c33104f0 | 2640 | lq_sta->is_dup = 0; |
c6ec7a9b | 2641 | lq_sta->max_rate_idx = -1; |
7d049e5a | 2642 | lq_sta->missed_rate_counter = IWL_MISSED_RATE_MAX; |
b261793d | 2643 | lq_sta->is_green = rs_use_green(sta, &priv->current_ht_config); |
39e88504 | 2644 | lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000); |
c33104f0 | 2645 | lq_sta->active_rate_basic = priv->active_rate_basic; |
8318d78a | 2646 | lq_sta->band = priv->band; |
77626355 BC |
2647 | /* |
2648 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2649 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2650 | */ | |
7869b0ea DH |
2651 | lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1; |
2652 | lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1; | |
c33104f0 | 2653 | lq_sta->active_siso_rate &= ~((u16)0x2); |
fde0db31 | 2654 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; |
b481de9c | 2655 | |
77626355 | 2656 | /* Same here */ |
7869b0ea DH |
2657 | lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1; |
2658 | lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1; | |
fde0db31 GC |
2659 | lq_sta->active_mimo2_rate &= ~((u16)0x2); |
2660 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2661 | ||
7869b0ea DH |
2662 | lq_sta->active_mimo3_rate = ht_cap->mcs.rx_mask[2] << 1; |
2663 | lq_sta->active_mimo3_rate |= ht_cap->mcs.rx_mask[2] & 0x1; | |
fde0db31 GC |
2664 | lq_sta->active_mimo3_rate &= ~((u16)0x2); |
2665 | lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; | |
2666 | ||
e1623446 | 2667 | IWL_DEBUG_RATE(priv, "SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n", |
c33104f0 | 2668 | lq_sta->active_siso_rate, |
fde0db31 GC |
2669 | lq_sta->active_mimo2_rate, |
2670 | lq_sta->active_mimo3_rate); | |
2671 | ||
a96a27f9 | 2672 | /* These values will be overridden later */ |
07bc28ed GC |
2673 | lq_sta->lq.general_params.single_stream_ant_msk = ANT_A; |
2674 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
2675 | ||
0c11b4de RR |
2676 | /* as default allow aggregation for all tids */ |
2677 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
c33104f0 | 2678 | lq_sta->drv = priv; |
b481de9c | 2679 | |
5027309b DH |
2680 | /* Set last_txrate_idx to lowest rate */ |
2681 | lq_sta->last_txrate_idx = rate_lowest_index(sband, sta); | |
2682 | if (sband->band == IEEE80211_BAND_5GHZ) | |
2683 | lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; | |
d5e49036 | 2684 | |
4b7679a5 | 2685 | rs_initialize_lq(priv, conf, sta, lq_sta); |
b481de9c ZY |
2686 | } |
2687 | ||
46f9381a | 2688 | static void rs_fill_link_cmd(struct iwl_priv *priv, |
e227ceac | 2689 | struct iwl_lq_sta *lq_sta, u32 new_rate) |
b481de9c | 2690 | { |
e227ceac | 2691 | struct iwl_scale_tbl_info tbl_type; |
b481de9c | 2692 | int index = 0; |
b481de9c | 2693 | int rate_idx; |
1b696de2 | 2694 | int repeat_rate = 0; |
aade00ce | 2695 | u8 ant_toggle_cnt = 0; |
b481de9c | 2696 | u8 use_ht_possible = 1; |
aade00ce | 2697 | u8 valid_tx_ant = 0; |
07bc28ed | 2698 | struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq; |
b481de9c | 2699 | |
77626355 | 2700 | /* Override starting rate (index 0) if needed for debug purposes */ |
39e88504 | 2701 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
98d7e09a | 2702 | |
39e88504 | 2703 | /* Interpret new_rate (rate_n_flags) */ |
aade00ce | 2704 | memset(&tbl_type, 0, sizeof(tbl_type)); |
39e88504 | 2705 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
b481de9c ZY |
2706 | &tbl_type, &rate_idx); |
2707 | ||
77626355 | 2708 | /* How many times should we repeat the initial rate? */ |
b481de9c | 2709 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce | 2710 | ant_toggle_cnt = 1; |
1b696de2 | 2711 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2712 | } else { |
1b696de2 | 2713 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2714 | } |
b481de9c ZY |
2715 | |
2716 | lq_cmd->general_params.mimo_delimiter = | |
2717 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2718 | |
2719 | /* Fill 1st table entry (index 0) */ | |
39e88504 | 2720 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c | 2721 | |
07bc28ed GC |
2722 | if (num_of_ant(tbl_type.ant_type) == 1) { |
2723 | lq_cmd->general_params.single_stream_ant_msk = | |
2724 | tbl_type.ant_type; | |
2725 | } else if (num_of_ant(tbl_type.ant_type) == 2) { | |
2726 | lq_cmd->general_params.dual_stream_ant_msk = | |
2727 | tbl_type.ant_type; | |
2728 | } /* otherwise we don't modify the existing value */ | |
b481de9c ZY |
2729 | |
2730 | index++; | |
1b696de2 | 2731 | repeat_rate--; |
b481de9c | 2732 | |
aade00ce GC |
2733 | if (priv) |
2734 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2735 | ||
77626355 | 2736 | /* Fill rest of rate table */ |
b481de9c | 2737 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2738 | /* Repeat initial/next rate. |
2739 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2740 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2741 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c | 2742 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2743 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2744 | ant_toggle_cnt++; | |
2745 | else if (priv && | |
2746 | rs_toggle_antenna(valid_tx_ant, | |
2747 | &new_rate, &tbl_type)) | |
2748 | ant_toggle_cnt = 1; | |
2749 | } | |
98d7e09a | 2750 | |
77626355 | 2751 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2752 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2753 | |
2754 | /* Fill next table entry */ | |
b481de9c | 2755 | lq_cmd->rs_table[index].rate_n_flags = |
39e88504 | 2756 | cpu_to_le32(new_rate); |
1b696de2 | 2757 | repeat_rate--; |
b481de9c ZY |
2758 | index++; |
2759 | } | |
2760 | ||
39e88504 | 2761 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
2762 | &rate_idx); |
2763 | ||
77626355 BC |
2764 | /* Indicate to uCode which entries might be MIMO. |
2765 | * If initial rate was MIMO, this will finally end up | |
2766 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
2767 | if (is_mimo(tbl_type.lq_type)) |
2768 | lq_cmd->general_params.mimo_delimiter = index; | |
2769 | ||
77626355 | 2770 | /* Get next rate */ |
39e88504 GC |
2771 | new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
2772 | use_ht_possible); | |
b481de9c | 2773 | |
77626355 | 2774 | /* How many times should we repeat the next rate? */ |
b481de9c | 2775 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2776 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2777 | ant_toggle_cnt++; | |
2778 | else if (priv && | |
2779 | rs_toggle_antenna(valid_tx_ant, | |
2780 | &new_rate, &tbl_type)) | |
2781 | ant_toggle_cnt = 1; | |
2782 | ||
1b696de2 | 2783 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2784 | } else { |
1b696de2 | 2785 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2786 | } |
b481de9c | 2787 | |
77626355 BC |
2788 | /* Don't allow HT rates after next pass. |
2789 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
2790 | use_ht_possible = 0; |
2791 | ||
77626355 | 2792 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2793 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2794 | |
2795 | /* Fill next table entry */ | |
39e88504 | 2796 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c ZY |
2797 | |
2798 | index++; | |
1b696de2 | 2799 | repeat_rate--; |
b481de9c ZY |
2800 | } |
2801 | ||
13c33a09 WYG |
2802 | lq_cmd->agg_params.agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_MAX; |
2803 | lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; | |
2804 | lq_cmd->agg_params.agg_time_limit = | |
2805 | cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); | |
b481de9c ZY |
2806 | } |
2807 | ||
4b7679a5 | 2808 | static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) |
b481de9c | 2809 | { |
4b7679a5 | 2810 | return hw->priv; |
b481de9c ZY |
2811 | } |
2812 | /* rate scale requires free function to be implemented */ | |
2813 | static void rs_free(void *priv_rate) | |
2814 | { | |
2815 | return; | |
2816 | } | |
2817 | ||
4b7679a5 JB |
2818 | static void rs_free_sta(void *priv_r, struct ieee80211_sta *sta, |
2819 | void *priv_sta) | |
b481de9c | 2820 | { |
e227ceac | 2821 | struct iwl_lq_sta *lq_sta = priv_sta; |
45527c2c | 2822 | struct iwl_priv *priv __maybe_unused = priv_r; |
b481de9c | 2823 | |
e1623446 | 2824 | IWL_DEBUG_RATE(priv, "enter\n"); |
c33104f0 | 2825 | kfree(lq_sta); |
e1623446 | 2826 | IWL_DEBUG_RATE(priv, "leave\n"); |
b481de9c ZY |
2827 | } |
2828 | ||
2829 | ||
93dc646a | 2830 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2831 | static int open_file_generic(struct inode *inode, struct file *file) |
2832 | { | |
2833 | file->private_data = inode->i_private; | |
2834 | return 0; | |
2835 | } | |
e227ceac TW |
2836 | static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
2837 | u32 *rate_n_flags, int index) | |
98d7e09a | 2838 | { |
bf403db8 | 2839 | struct iwl_priv *priv; |
3c4955f8 WYG |
2840 | u8 valid_tx_ant; |
2841 | u8 ant_sel_tx; | |
bf403db8 EK |
2842 | |
2843 | priv = lq_sta->drv; | |
3c4955f8 | 2844 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
39e88504 | 2845 | if (lq_sta->dbg_fixed_rate) { |
3c4955f8 WYG |
2846 | ant_sel_tx = |
2847 | ((lq_sta->dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) | |
2848 | >> RATE_MCS_ANT_POS); | |
2849 | if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) { | |
39e88504 | 2850 | *rate_n_flags = lq_sta->dbg_fixed_rate; |
3c4955f8 | 2851 | IWL_DEBUG_RATE(priv, "Fixed rate ON\n"); |
39e88504 | 2852 | } else { |
3c4955f8 WYG |
2853 | lq_sta->dbg_fixed_rate = 0; |
2854 | IWL_ERR(priv, | |
2855 | "Invalid antenna selection 0x%X, Valid is 0x%X\n", | |
2856 | ant_sel_tx, valid_tx_ant); | |
2857 | IWL_DEBUG_RATE(priv, "Fixed rate OFF\n"); | |
39e88504 | 2858 | } |
39e88504 | 2859 | } else { |
e1623446 | 2860 | IWL_DEBUG_RATE(priv, "Fixed rate OFF\n"); |
98d7e09a | 2861 | } |
98d7e09a | 2862 | } |
5ae212c9 | 2863 | |
98d7e09a ZY |
2864 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2865 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2866 | { | |
e227ceac | 2867 | struct iwl_lq_sta *lq_sta = file->private_data; |
bf403db8 | 2868 | struct iwl_priv *priv; |
98d7e09a ZY |
2869 | char buf[64]; |
2870 | int buf_size; | |
2871 | u32 parsed_rate; | |
2872 | ||
bf403db8 | 2873 | priv = lq_sta->drv; |
98d7e09a ZY |
2874 | memset(buf, 0, sizeof(buf)); |
2875 | buf_size = min(count, sizeof(buf) - 1); | |
2876 | if (copy_from_user(buf, user_buf, buf_size)) | |
2877 | return -EFAULT; | |
2878 | ||
2879 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
39e88504 | 2880 | lq_sta->dbg_fixed_rate = parsed_rate; |
98d7e09a | 2881 | else |
39e88504 | 2882 | lq_sta->dbg_fixed_rate = 0; |
98d7e09a | 2883 | |
39e88504 GC |
2884 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ |
2885 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2886 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2887 | lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
98d7e09a | 2888 | |
e1623446 | 2889 | IWL_DEBUG_RATE(priv, "sta_id %d rate 0x%X\n", |
39e88504 | 2890 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
98d7e09a | 2891 | |
39e88504 | 2892 | if (lq_sta->dbg_fixed_rate) { |
07bc28ed | 2893 | rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
66c73db7 | 2894 | iwl_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC); |
98d7e09a ZY |
2895 | } |
2896 | ||
2897 | return count; | |
2898 | } | |
0209dc11 | 2899 | |
5ae212c9 ZY |
2900 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2901 | char __user *user_buf, size_t count, loff_t *ppos) | |
2902 | { | |
a412c804 | 2903 | char *buff; |
5ae212c9 ZY |
2904 | int desc = 0; |
2905 | int i = 0; | |
12b96817 | 2906 | int index = 0; |
a412c804 | 2907 | ssize_t ret; |
5ae212c9 | 2908 | |
e227ceac | 2909 | struct iwl_lq_sta *lq_sta = file->private_data; |
d8ae4f52 | 2910 | struct iwl_priv *priv; |
adb7b5e6 | 2911 | struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
5ae212c9 | 2912 | |
d8ae4f52 | 2913 | priv = lq_sta->drv; |
a412c804 FS |
2914 | buff = kmalloc(1024, GFP_KERNEL); |
2915 | if (!buff) | |
2916 | return -ENOMEM; | |
2917 | ||
c33104f0 | 2918 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 2919 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 | 2920 | lq_sta->total_failed, lq_sta->total_success, |
39e88504 | 2921 | lq_sta->active_legacy_rate); |
98d7e09a | 2922 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
39e88504 | 2923 | lq_sta->dbg_fixed_rate); |
d8ae4f52 WYG |
2924 | desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n", |
2925 | (priv->hw_params.valid_tx_ant & ANT_A) ? "ANT_A," : "", | |
2926 | (priv->hw_params.valid_tx_ant & ANT_B) ? "ANT_B," : "", | |
2927 | (priv->hw_params.valid_tx_ant & ANT_C) ? "ANT_C" : ""); | |
adb7b5e6 WYG |
2928 | desc += sprintf(buff+desc, "lq type %s\n", |
2929 | (is_legacy(tbl->lq_type)) ? "legacy" : "HT"); | |
2930 | if (is_Ht(tbl->lq_type)) { | |
2931 | desc += sprintf(buff+desc, " %s", | |
2932 | (is_siso(tbl->lq_type)) ? "SISO" : | |
2933 | ((is_mimo2(tbl->lq_type)) ? "MIMO2" : "MIMO3")); | |
2934 | desc += sprintf(buff+desc, " %s", | |
7aafef1c | 2935 | (tbl->is_ht40) ? "40MHz" : "20MHz"); |
2681b20b WYG |
2936 | desc += sprintf(buff+desc, " %s %s\n", (tbl->is_SGI) ? "SGI" : "", |
2937 | (lq_sta->is_green) ? "GF enabled" : ""); | |
adb7b5e6 | 2938 | } |
12b96817 WYG |
2939 | desc += sprintf(buff+desc, "last tx rate=0x%X\n", |
2940 | lq_sta->last_rate_n_flags); | |
5ae212c9 ZY |
2941 | desc += sprintf(buff+desc, "general:" |
2942 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
2943 | lq_sta->lq.general_params.flags, |
2944 | lq_sta->lq.general_params.mimo_delimiter, | |
2945 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2946 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
2947 | |
2948 | desc += sprintf(buff+desc, "agg:" | |
2949 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
2950 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
2951 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2952 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
2953 | |
2954 | desc += sprintf(buff+desc, | |
2955 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
2956 | lq_sta->lq.general_params.start_rate_index[0], |
2957 | lq_sta->lq.general_params.start_rate_index[1], | |
2958 | lq_sta->lq.general_params.start_rate_index[2], | |
2959 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 | 2960 | |
12b96817 WYG |
2961 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { |
2962 | index = iwl_hwrate_to_plcp_idx( | |
2963 | le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); | |
2964 | if (is_legacy(tbl->lq_type)) { | |
2965 | desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n", | |
2966 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
2967 | iwl_rate_mcs[index].mbps); | |
2968 | } else { | |
2969 | desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps (%s)\n", | |
2970 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), | |
2971 | iwl_rate_mcs[index].mbps, iwl_rate_mcs[index].mcs); | |
2972 | } | |
2973 | } | |
5ae212c9 | 2974 | |
a412c804 FS |
2975 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
2976 | kfree(buff); | |
2977 | return ret; | |
5ae212c9 ZY |
2978 | } |
2979 | ||
2980 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2981 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2982 | .read = rs_sta_dbgfs_scale_table_read, |
2983 | .open = open_file_generic, | |
2984 | }; | |
0209dc11 ZY |
2985 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2986 | char __user *user_buf, size_t count, loff_t *ppos) | |
2987 | { | |
a412c804 | 2988 | char *buff; |
0209dc11 ZY |
2989 | int desc = 0; |
2990 | int i, j; | |
a412c804 | 2991 | ssize_t ret; |
0209dc11 | 2992 | |
e227ceac | 2993 | struct iwl_lq_sta *lq_sta = file->private_data; |
a412c804 FS |
2994 | |
2995 | buff = kmalloc(1024, GFP_KERNEL); | |
2996 | if (!buff) | |
2997 | return -ENOMEM; | |
2998 | ||
0209dc11 | 2999 | for (i = 0; i < LQ_SIZE; i++) { |
7aafef1c WYG |
3000 | desc += sprintf(buff+desc, |
3001 | "%s type=%d SGI=%d HT40=%d DUP=%d GF=%d\n" | |
0209dc11 | 3002 | "rate=0x%X\n", |
c3056065 | 3003 | lq_sta->active_tbl == i ? "*" : "x", |
c33104f0 TW |
3004 | lq_sta->lq_info[i].lq_type, |
3005 | lq_sta->lq_info[i].is_SGI, | |
7aafef1c | 3006 | lq_sta->lq_info[i].is_ht40, |
c33104f0 | 3007 | lq_sta->lq_info[i].is_dup, |
2681b20b | 3008 | lq_sta->is_green, |
39e88504 | 3009 | lq_sta->lq_info[i].current_rate); |
0209dc11 ZY |
3010 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
3011 | desc += sprintf(buff+desc, | |
c33104f0 TW |
3012 | "counter=%d success=%d %%=%d\n", |
3013 | lq_sta->lq_info[i].win[j].counter, | |
3014 | lq_sta->lq_info[i].win[j].success_counter, | |
3015 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
3016 | } |
3017 | } | |
a412c804 FS |
3018 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
3019 | kfree(buff); | |
3020 | return ret; | |
0209dc11 ZY |
3021 | } |
3022 | ||
3023 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
3024 | .read = rs_sta_dbgfs_stats_table_read, | |
3025 | .open = open_file_generic, | |
3026 | }; | |
5ae212c9 | 3027 | |
38167459 WYG |
3028 | static ssize_t rs_sta_dbgfs_rate_scale_data_read(struct file *file, |
3029 | char __user *user_buf, size_t count, loff_t *ppos) | |
3030 | { | |
3031 | char buff[120]; | |
3032 | int desc = 0; | |
3033 | ssize_t ret; | |
3034 | ||
3035 | struct iwl_lq_sta *lq_sta = file->private_data; | |
3036 | struct iwl_priv *priv; | |
3037 | struct iwl_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl]; | |
3038 | ||
3039 | priv = lq_sta->drv; | |
3040 | ||
3041 | if (is_Ht(tbl->lq_type)) | |
3042 | desc += sprintf(buff+desc, | |
3043 | "Bit Rate= %d Mb/s\n", | |
3044 | tbl->expected_tpt[lq_sta->last_txrate_idx]); | |
3045 | else | |
3046 | desc += sprintf(buff+desc, | |
3047 | "Bit Rate= %d Mb/s\n", | |
3048 | iwl_rates[lq_sta->last_txrate_idx].ieee >> 1); | |
3049 | desc += sprintf(buff+desc, | |
3050 | "Signal Level= %d dBm\tNoise Level= %d dBm\n", | |
3051 | priv->last_rx_rssi, priv->last_rx_noise); | |
3052 | desc += sprintf(buff+desc, | |
3053 | "Tsf= 0x%llx\tBeacon time= 0x%08X\n", | |
3054 | priv->last_tsf, priv->last_beacon_time); | |
3055 | ||
3056 | ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
3057 | return ret; | |
3058 | } | |
3059 | ||
3060 | static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = { | |
3061 | .read = rs_sta_dbgfs_rate_scale_data_read, | |
3062 | .open = open_file_generic, | |
3063 | }; | |
3064 | ||
93dc646a ZY |
3065 | static void rs_add_debugfs(void *priv, void *priv_sta, |
3066 | struct dentry *dir) | |
3067 | { | |
e227ceac | 3068 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 | 3069 | lq_sta->rs_sta_dbgfs_scale_table_file = |
0209dc11 | 3070 | debugfs_create_file("rate_scale_table", 0600, dir, |
c33104f0 TW |
3071 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
3072 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
0209dc11 | 3073 | debugfs_create_file("rate_stats_table", 0600, dir, |
c33104f0 | 3074 | lq_sta, &rs_sta_dbgfs_stats_table_ops); |
38167459 WYG |
3075 | lq_sta->rs_sta_dbgfs_rate_scale_data_file = |
3076 | debugfs_create_file("rate_scale_data", 0600, dir, | |
3077 | lq_sta, &rs_sta_dbgfs_rate_scale_data_ops); | |
0c11b4de RR |
3078 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
3079 | debugfs_create_u8("tx_agg_tid_enable", 0600, dir, | |
3080 | &lq_sta->tx_agg_tid_en); | |
0c11b4de | 3081 | |
93dc646a ZY |
3082 | } |
3083 | ||
3084 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
3085 | { | |
e227ceac | 3086 | struct iwl_lq_sta *lq_sta = priv_sta; |
c33104f0 TW |
3087 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); |
3088 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
38167459 | 3089 | debugfs_remove(lq_sta->rs_sta_dbgfs_rate_scale_data_file); |
0c11b4de | 3090 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); |
93dc646a ZY |
3091 | } |
3092 | #endif | |
3093 | ||
b481de9c ZY |
3094 | static struct rate_control_ops rs_ops = { |
3095 | .module = NULL, | |
3096 | .name = RS_NAME, | |
3097 | .tx_status = rs_tx_status, | |
3098 | .get_rate = rs_get_rate, | |
3099 | .rate_init = rs_rate_init, | |
b481de9c ZY |
3100 | .alloc = rs_alloc, |
3101 | .free = rs_free, | |
3102 | .alloc_sta = rs_alloc_sta, | |
3103 | .free_sta = rs_free_sta, | |
93dc646a ZY |
3104 | #ifdef CONFIG_MAC80211_DEBUGFS |
3105 | .add_sta_debugfs = rs_add_debugfs, | |
3106 | .remove_sta_debugfs = rs_remove_debugfs, | |
3107 | #endif | |
b481de9c ZY |
3108 | }; |
3109 | ||
e227ceac | 3110 | int iwlagn_rate_control_register(void) |
b481de9c | 3111 | { |
897e1cf2 | 3112 | return ieee80211_rate_control_register(&rs_ops); |
b481de9c ZY |
3113 | } |
3114 | ||
e227ceac | 3115 | void iwlagn_rate_control_unregister(void) |
b481de9c ZY |
3116 | { |
3117 | ieee80211_rate_control_unregister(&rs_ops); | |
3118 | } | |
3119 |