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b481de9c ZY |
1 | /****************************************************************************** |
2 | * | |
eb7ae89c | 3 | * Copyright(c) 2005 - 2008 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: | |
22 | * James P. Ketrenos <ipw2100-admin@linux.intel.com> | |
23 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
24 | * | |
25 | *****************************************************************************/ | |
26 | #include <linux/kernel.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/skbuff.h> | |
29 | #include <linux/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 | ||
2c8dccc7 | 38 | #include "../net/mac80211/rate.h" |
b481de9c | 39 | |
5d08cd1d | 40 | #include "iwl-4965.h" |
857485c0 | 41 | #include "iwl-core.h" |
b481de9c ZY |
42 | #include "iwl-helpers.h" |
43 | ||
44 | #define RS_NAME "iwl-4965-rs" | |
45 | ||
aade00ce | 46 | #define NUM_TRY_BEFORE_ANT_TOGGLE 1 |
b481de9c ZY |
47 | #define IWL_NUMBER_TRY 1 |
48 | #define IWL_HT_NUMBER_TRY 3 | |
49 | ||
77626355 BC |
50 | #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
51 | #define IWL_RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */ | |
52 | #define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ | |
53 | ||
54 | /* max time to accum history 2 seconds */ | |
55 | #define IWL_RATE_SCALE_FLUSH_INTVL (2*HZ) | |
b481de9c ZY |
56 | |
57 | static u8 rs_ht_to_legacy[] = { | |
58 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
59 | IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, | |
60 | IWL_RATE_6M_INDEX, | |
61 | IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX, | |
62 | IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX, | |
63 | IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX, | |
64 | IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX | |
65 | }; | |
66 | ||
aade00ce GC |
67 | static const u8 ant_toggle_lookup[] = { |
68 | /*ANT_NONE -> */ ANT_NONE, | |
69 | /*ANT_A -> */ ANT_B, | |
70 | /*ANT_B -> */ ANT_C, | |
71 | /*ANT_AB -> */ ANT_BC, | |
72 | /*ANT_C -> */ ANT_A, | |
73 | /*ANT_AC -> */ ANT_AB, | |
74 | /*ANT_BC -> */ ANT_AC, | |
75 | /*ANT_ABC -> */ ANT_ABC, | |
76 | }; | |
77 | ||
77626355 BC |
78 | /** |
79 | * struct iwl4965_rate_scale_data -- tx success history for one rate | |
80 | */ | |
bb8c093b | 81 | struct iwl4965_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 BC |
90 | /** |
91 | * struct iwl4965_scale_tbl_info -- tx params and success history for all rates | |
92 | * | |
0c11b4de | 93 | * There are two of these in struct iwl4965_lq_sta, |
77626355 BC |
94 | * one for "active", and one for "search". |
95 | */ | |
bb8c093b | 96 | struct iwl4965_scale_tbl_info { |
fde0db31 GC |
97 | enum iwl_table_type lq_type; |
98 | u8 ant_type; | |
77626355 BC |
99 | u8 is_SGI; /* 1 = short guard interval */ |
100 | u8 is_fat; /* 1 = 40 MHz channel width */ | |
101 | u8 is_dup; /* 1 = duplicated data streams */ | |
102 | u8 action; /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */ | |
103 | s32 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */ | |
39e88504 | 104 | u32 current_rate; /* rate_n_flags, uCode API format */ |
77626355 | 105 | struct iwl4965_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */ |
b481de9c ZY |
106 | }; |
107 | ||
0c11b4de RR |
108 | #ifdef CONFIG_IWL4965_HT |
109 | ||
110 | struct iwl4965_traffic_load { | |
111 | unsigned long time_stamp; /* age of the oldest statistics */ | |
112 | u32 packet_count[TID_QUEUE_MAX_SIZE]; /* packet count in this time | |
113 | * slice */ | |
114 | u32 total; /* total num of packets during the | |
115 | * last TID_MAX_TIME_DIFF */ | |
116 | u8 queue_count; /* number of queues that has | |
117 | * been used since the last cleanup */ | |
118 | u8 head; /* start of the circular buffer */ | |
119 | }; | |
120 | ||
121 | #endif /* CONFIG_IWL4965_HT */ | |
122 | ||
77626355 | 123 | /** |
0c11b4de | 124 | * struct iwl4965_lq_sta -- driver's rate scaling private structure |
77626355 BC |
125 | * |
126 | * Pointer to this gets passed back and forth between driver and mac80211. | |
127 | */ | |
c33104f0 | 128 | struct iwl4965_lq_sta { |
77626355 BC |
129 | u8 active_tbl; /* index of active table, range 0-1 */ |
130 | u8 enable_counter; /* indicates HT mode */ | |
131 | u8 stay_in_tbl; /* 1: disallow, 0: allow search for new mode */ | |
132 | u8 search_better_tbl; /* 1: currently trying alternate mode */ | |
b481de9c | 133 | s32 last_tpt; |
77626355 BC |
134 | |
135 | /* The following determine when to search for a new mode */ | |
b481de9c | 136 | u32 table_count_limit; |
77626355 BC |
137 | u32 max_failure_limit; /* # failed frames before new search */ |
138 | u32 max_success_limit; /* # successful frames before new search */ | |
b481de9c | 139 | u32 table_count; |
77626355 BC |
140 | u32 total_failed; /* total failed frames, any/all rates */ |
141 | u32 total_success; /* total successful frames, any/all rates */ | |
142 | u32 flush_timer; /* time staying in mode before new search */ | |
143 | ||
144 | u8 action_counter; /* # mode-switch actions tried */ | |
b481de9c ZY |
145 | u8 is_green; |
146 | u8 is_dup; | |
8318d78a | 147 | enum ieee80211_band band; |
b481de9c | 148 | u8 ibss_sta_added; |
77626355 BC |
149 | |
150 | /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */ | |
02dede04 | 151 | u32 supp_rates; |
39e88504 | 152 | u16 active_legacy_rate; |
b481de9c | 153 | u16 active_siso_rate; |
fde0db31 GC |
154 | u16 active_mimo2_rate; |
155 | u16 active_mimo3_rate; | |
b481de9c | 156 | u16 active_rate_basic; |
77626355 | 157 | |
66c73db7 | 158 | struct iwl_link_quality_cmd lq; |
77626355 | 159 | struct iwl4965_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */ |
0c11b4de RR |
160 | #ifdef CONFIG_IWL4965_HT |
161 | struct iwl4965_traffic_load load[TID_MAX_LOAD_COUNT]; | |
162 | u8 tx_agg_tid_en; | |
163 | #endif | |
5ae212c9 | 164 | #ifdef CONFIG_MAC80211_DEBUGFS |
98d7e09a | 165 | struct dentry *rs_sta_dbgfs_scale_table_file; |
0209dc11 | 166 | struct dentry *rs_sta_dbgfs_stats_table_file; |
0c11b4de RR |
167 | #ifdef CONFIG_IWL4965_HT |
168 | struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file; | |
169 | #endif | |
39e88504 | 170 | u32 dbg_fixed_rate; |
c79dd5b5 | 171 | struct iwl_priv *drv; |
5ae212c9 | 172 | #endif |
b481de9c ZY |
173 | }; |
174 | ||
c79dd5b5 | 175 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c ZY |
176 | struct net_device *dev, |
177 | struct ieee80211_hdr *hdr, | |
178 | struct sta_info *sta); | |
fde0db31 GC |
179 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
180 | struct iwl4965_lq_sta *lq_sta, | |
39e88504 | 181 | u32 rate_n_flags, |
66c73db7 | 182 | struct iwl_link_quality_cmd *tbl); |
b481de9c ZY |
183 | |
184 | ||
98d7e09a | 185 | #ifdef CONFIG_MAC80211_DEBUGFS |
c33104f0 | 186 | static void rs_dbgfs_set_mcs(struct iwl4965_lq_sta *lq_sta, |
39e88504 | 187 | u32 *rate_n_flags, int index); |
98d7e09a | 188 | #else |
c33104f0 | 189 | static void rs_dbgfs_set_mcs(struct iwl4965_lq_sta *lq_sta, |
39e88504 | 190 | u32 *rate_n_flags, int index) |
98d7e09a ZY |
191 | {} |
192 | #endif | |
77626355 BC |
193 | |
194 | /* | |
195 | * Expected throughput metrics for following rates: | |
196 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
197 | * "G" is the only table that supports CCK (the first 4 rates). | |
198 | */ | |
fde0db31 | 199 | /*FIXME:RS:need to spearate tables for MIMO2/MIMO3*/ |
b481de9c ZY |
200 | static s32 expected_tpt_A[IWL_RATE_COUNT] = { |
201 | 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
202 | }; | |
203 | ||
204 | static s32 expected_tpt_G[IWL_RATE_COUNT] = { | |
205 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
206 | }; | |
207 | ||
208 | static s32 expected_tpt_siso20MHz[IWL_RATE_COUNT] = { | |
209 | 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202 | |
210 | }; | |
211 | ||
212 | static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { | |
213 | 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 | |
214 | }; | |
215 | ||
216 | static s32 expected_tpt_mimo20MHz[IWL_RATE_COUNT] = { | |
217 | 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 | |
218 | }; | |
219 | ||
220 | static s32 expected_tpt_mimo20MHzSGI[IWL_RATE_COUNT] = { | |
221 | 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 | |
222 | }; | |
223 | ||
224 | static s32 expected_tpt_siso40MHz[IWL_RATE_COUNT] = { | |
225 | 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257 | |
226 | }; | |
227 | ||
228 | static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { | |
229 | 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 | |
230 | }; | |
231 | ||
232 | static s32 expected_tpt_mimo40MHz[IWL_RATE_COUNT] = { | |
233 | 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 | |
234 | }; | |
235 | ||
236 | static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = { | |
237 | 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 | |
238 | }; | |
239 | ||
39e88504 | 240 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
b481de9c ZY |
241 | { |
242 | return (u8)(rate_n_flags & 0xFF); | |
243 | } | |
244 | ||
bb8c093b | 245 | static void rs_rate_scale_clear_window(struct iwl4965_rate_scale_data *window) |
b481de9c ZY |
246 | { |
247 | window->data = 0; | |
248 | window->success_counter = 0; | |
249 | window->success_ratio = IWL_INVALID_VALUE; | |
250 | window->counter = 0; | |
251 | window->average_tpt = IWL_INVALID_VALUE; | |
252 | window->stamp = 0; | |
b481de9c ZY |
253 | } |
254 | ||
aade00ce GC |
255 | static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
256 | { | |
257 | return ((ant_type & valid_antenna) == ant_type); | |
258 | } | |
259 | ||
0c11b4de RR |
260 | #ifdef CONFIG_IWL4965_HT |
261 | /* | |
262 | * removes the old data from the statistics. All data that is older than | |
263 | * TID_MAX_TIME_DIFF, will be deleted. | |
264 | */ | |
265 | static void rs_tl_rm_old_stats(struct iwl4965_traffic_load *tl, u32 curr_time) | |
266 | { | |
267 | /* The oldest age we want to keep */ | |
268 | u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; | |
269 | ||
270 | while (tl->queue_count && | |
271 | (tl->time_stamp < oldest_time)) { | |
272 | tl->total -= tl->packet_count[tl->head]; | |
273 | tl->packet_count[tl->head] = 0; | |
274 | tl->time_stamp += TID_QUEUE_CELL_SPACING; | |
275 | tl->queue_count--; | |
276 | tl->head++; | |
277 | if (tl->head >= TID_QUEUE_MAX_SIZE) | |
278 | tl->head = 0; | |
279 | } | |
280 | } | |
281 | ||
282 | /* | |
283 | * increment traffic load value for tid and also remove | |
284 | * any old values if passed the certain time period | |
285 | */ | |
286 | static void rs_tl_add_packet(struct iwl4965_lq_sta *lq_data, u8 tid) | |
287 | { | |
288 | u32 curr_time = jiffies_to_msecs(jiffies); | |
289 | u32 time_diff; | |
290 | s32 index; | |
291 | struct iwl4965_traffic_load *tl = NULL; | |
292 | ||
293 | if (tid >= TID_MAX_LOAD_COUNT) | |
294 | return; | |
295 | ||
296 | tl = &lq_data->load[tid]; | |
297 | ||
298 | curr_time -= curr_time % TID_ROUND_VALUE; | |
299 | ||
300 | /* Happens only for the first packet. Initialize the data */ | |
301 | if (!(tl->queue_count)) { | |
302 | tl->total = 1; | |
303 | tl->time_stamp = curr_time; | |
304 | tl->queue_count = 1; | |
305 | tl->head = 0; | |
306 | tl->packet_count[0] = 1; | |
307 | return; | |
308 | } | |
309 | ||
310 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
311 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
312 | ||
313 | /* The history is too long: remove data that is older than */ | |
314 | /* TID_MAX_TIME_DIFF */ | |
315 | if (index >= TID_QUEUE_MAX_SIZE) | |
316 | rs_tl_rm_old_stats(tl, curr_time); | |
317 | ||
318 | index = (tl->head + index) % TID_QUEUE_MAX_SIZE; | |
319 | tl->packet_count[index] = tl->packet_count[index] + 1; | |
320 | tl->total = tl->total + 1; | |
321 | ||
322 | if ((index + 1) > tl->queue_count) | |
323 | tl->queue_count = index + 1; | |
324 | } | |
325 | ||
326 | /* | |
327 | get the traffic load value for tid | |
328 | */ | |
329 | static u32 rs_tl_get_load(struct iwl4965_lq_sta *lq_data, u8 tid) | |
330 | { | |
331 | u32 curr_time = jiffies_to_msecs(jiffies); | |
332 | u32 time_diff; | |
333 | s32 index; | |
334 | struct iwl4965_traffic_load *tl = NULL; | |
335 | ||
336 | if (tid >= TID_MAX_LOAD_COUNT) | |
337 | return 0; | |
338 | ||
339 | tl = &(lq_data->load[tid]); | |
340 | ||
341 | curr_time -= curr_time % TID_ROUND_VALUE; | |
342 | ||
343 | if (!(tl->queue_count)) | |
344 | return 0; | |
345 | ||
346 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
347 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
348 | ||
349 | /* The history is too long: remove data that is older than */ | |
350 | /* TID_MAX_TIME_DIFF */ | |
351 | if (index >= TID_QUEUE_MAX_SIZE) | |
352 | rs_tl_rm_old_stats(tl, curr_time); | |
353 | ||
354 | return tl->total; | |
355 | } | |
356 | ||
c79dd5b5 | 357 | static void rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv, |
0c11b4de RR |
358 | struct iwl4965_lq_sta *lq_data, u8 tid, |
359 | struct sta_info *sta) | |
360 | { | |
361 | unsigned long state; | |
362 | DECLARE_MAC_BUF(mac); | |
363 | ||
364 | spin_lock_bh(&sta->ampdu_mlme.ampdu_tx); | |
cee24a3e | 365 | state = sta->ampdu_mlme.tid_state_tx[tid]; |
0c11b4de RR |
366 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx); |
367 | ||
368 | if (state == HT_AGG_STATE_IDLE && | |
369 | rs_tl_get_load(lq_data, tid) > IWL_AGG_LOAD_THRESHOLD) { | |
370 | IWL_DEBUG_HT("Starting Tx agg: STA: %s tid: %d\n", | |
371 | print_mac(mac, sta->addr), tid); | |
372 | ieee80211_start_tx_ba_session(priv->hw, sta->addr, tid); | |
373 | } | |
374 | } | |
375 | ||
c79dd5b5 | 376 | static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
0c11b4de RR |
377 | struct iwl4965_lq_sta *lq_data, |
378 | struct sta_info *sta) | |
379 | { | |
380 | if ((tid < TID_MAX_LOAD_COUNT)) | |
381 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
382 | else if (tid == IWL_AGG_ALL_TID) | |
383 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) | |
384 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
385 | } | |
386 | ||
387 | #endif /* CONFIG_IWLWIFI_HT */ | |
388 | ||
39e88504 | 389 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
fde0db31 | 390 | { |
39e88504 GC |
391 | return (!!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
392 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
393 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK)); | |
fde0db31 GC |
394 | } |
395 | ||
77626355 BC |
396 | /** |
397 | * rs_collect_tx_data - Update the success/failure sliding window | |
398 | * | |
399 | * We keep a sliding window of the last 62 packets transmitted | |
400 | * at this rate. window->data contains the bitmask of successful | |
401 | * packets. | |
402 | */ | |
bb8c093b | 403 | static int rs_collect_tx_data(struct iwl4965_rate_scale_data *windows, |
99556438 RR |
404 | int scale_index, s32 tpt, int retries, |
405 | int successes) | |
b481de9c | 406 | { |
bb8c093b | 407 | struct iwl4965_rate_scale_data *window = NULL; |
39e88504 | 408 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
b481de9c ZY |
409 | s32 fail_count; |
410 | ||
dc2453ae TW |
411 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
412 | return -EINVAL; | |
b481de9c | 413 | |
77626355 | 414 | /* Select data for current tx bit rate */ |
b481de9c ZY |
415 | window = &(windows[scale_index]); |
416 | ||
77626355 BC |
417 | /* |
418 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
419 | * history window; anything older isn't really relevant any more. | |
420 | * If we have filled up the sliding window, drop the oldest attempt; | |
421 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
422 | * subtract "1" from the success counter (this is the main reason | |
423 | * we keep these bitmaps!). | |
424 | */ | |
99556438 | 425 | while (retries > 0) { |
39e88504 GC |
426 | if (window->counter >= IWL_RATE_MAX_WINDOW) { |
427 | ||
428 | /* remove earliest */ | |
429 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
430 | ||
99556438 RR |
431 | if (window->data & mask) { |
432 | window->data &= ~mask; | |
39e88504 | 433 | window->success_counter--; |
99556438 | 434 | } |
b481de9c | 435 | } |
b481de9c | 436 | |
99556438 RR |
437 | /* Increment frames-attempted counter */ |
438 | window->counter++; | |
439 | ||
440 | /* Shift bitmap by one frame (throw away oldest history), | |
441 | * OR in "1", and increment "success" if this | |
442 | * frame was successful. */ | |
39e88504 | 443 | window->data <<= 1;; |
99556438 | 444 | if (successes > 0) { |
39e88504 | 445 | window->success_counter++; |
99556438 RR |
446 | window->data |= 0x1; |
447 | successes--; | |
448 | } | |
77626355 | 449 | |
99556438 | 450 | retries--; |
b481de9c ZY |
451 | } |
452 | ||
77626355 | 453 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
454 | if (window->counter > 0) |
455 | window->success_ratio = 128 * (100 * window->success_counter) | |
456 | / window->counter; | |
457 | else | |
458 | window->success_ratio = IWL_INVALID_VALUE; | |
459 | ||
460 | fail_count = window->counter - window->success_counter; | |
461 | ||
77626355 | 462 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
463 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
464 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
465 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
466 | else | |
467 | window->average_tpt = IWL_INVALID_VALUE; | |
468 | ||
77626355 | 469 | /* Tag this window as having been updated */ |
b481de9c ZY |
470 | window->stamp = jiffies; |
471 | ||
dc2453ae | 472 | return 0; |
b481de9c ZY |
473 | } |
474 | ||
77626355 BC |
475 | /* |
476 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
477 | */ | |
39e88504 GC |
478 | /* FIXME:RS:remove this function and put the flags statically in the table */ |
479 | static u32 rate_n_flags_from_tbl(struct iwl4965_scale_tbl_info *tbl, | |
480 | int index, u8 use_green) | |
b481de9c | 481 | { |
39e88504 GC |
482 | u32 rate_n_flags = 0; |
483 | ||
b481de9c | 484 | if (is_legacy(tbl->lq_type)) { |
39e88504 | 485 | rate_n_flags = iwl4965_rates[index].plcp; |
b481de9c | 486 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
39e88504 | 487 | rate_n_flags |= RATE_MCS_CCK_MSK; |
b481de9c | 488 | |
fde0db31 GC |
489 | } else if (is_Ht(tbl->lq_type)) { |
490 | if (index > IWL_LAST_OFDM_RATE) { | |
491 | IWL_ERROR("invalid HT rate index %d\n", index); | |
b481de9c | 492 | index = IWL_LAST_OFDM_RATE; |
fde0db31 | 493 | } |
39e88504 | 494 | rate_n_flags = RATE_MCS_HT_MSK; |
fde0db31 GC |
495 | |
496 | if (is_siso(tbl->lq_type)) | |
39e88504 | 497 | rate_n_flags |= iwl4965_rates[index].plcp_siso; |
fde0db31 | 498 | else if (is_mimo2(tbl->lq_type)) |
39e88504 | 499 | rate_n_flags |= iwl4965_rates[index].plcp_mimo2; |
fde0db31 | 500 | else |
39e88504 | 501 | rate_n_flags |= iwl4965_rates[index].plcp_mimo3; |
b481de9c | 502 | } else { |
fde0db31 | 503 | IWL_ERROR("Invalid tbl->lq_type %d\n", tbl->lq_type); |
b481de9c ZY |
504 | } |
505 | ||
39e88504 | 506 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & |
fde0db31 | 507 | RATE_MCS_ANT_ABC_MSK); |
b481de9c | 508 | |
39e88504 GC |
509 | if (is_Ht(tbl->lq_type)) { |
510 | if (tbl->is_fat) { | |
511 | if (tbl->is_dup) | |
512 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
513 | else | |
514 | rate_n_flags |= RATE_MCS_FAT_MSK; | |
515 | } | |
516 | if (tbl->is_SGI) | |
517 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
518 | ||
519 | if (use_green) { | |
520 | rate_n_flags |= RATE_MCS_GF_MSK; | |
521 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
522 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
523 | IWL_ERROR("GF was set with SGI:SISO\n"); | |
524 | } | |
525 | } | |
b481de9c | 526 | } |
39e88504 | 527 | return rate_n_flags; |
b481de9c ZY |
528 | } |
529 | ||
77626355 BC |
530 | /* |
531 | * Interpret uCode API's rate_n_flags format, | |
532 | * fill "search" or "active" tx mode table. | |
533 | */ | |
39e88504 | 534 | static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
8318d78a JB |
535 | enum ieee80211_band band, |
536 | struct iwl4965_scale_tbl_info *tbl, | |
b481de9c ZY |
537 | int *rate_idx) |
538 | { | |
39e88504 GC |
539 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
540 | u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); | |
541 | u8 mcs; | |
b481de9c | 542 | |
39e88504 | 543 | *rate_idx = iwl4965_hwrate_to_plcp_idx(rate_n_flags); |
b481de9c | 544 | |
fde0db31 | 545 | if (*rate_idx == IWL_RATE_INVALID) { |
b481de9c | 546 | *rate_idx = -1; |
dc2453ae | 547 | return -EINVAL; |
b481de9c | 548 | } |
77626355 | 549 | tbl->is_SGI = 0; /* default legacy setup */ |
b481de9c ZY |
550 | tbl->is_fat = 0; |
551 | tbl->is_dup = 0; | |
fde0db31 GC |
552 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
553 | tbl->lq_type = LQ_NONE; | |
b481de9c | 554 | |
77626355 | 555 | /* legacy rate format */ |
39e88504 | 556 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
fde0db31 | 557 | if (num_of_ant == 1) { |
8318d78a | 558 | if (band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
559 | tbl->lq_type = LQ_A; |
560 | else | |
561 | tbl->lq_type = LQ_G; | |
b481de9c | 562 | } |
fde0db31 | 563 | /* HT rate format */ |
b481de9c | 564 | } else { |
39e88504 | 565 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
b481de9c ZY |
566 | tbl->is_SGI = 1; |
567 | ||
39e88504 GC |
568 | if ((rate_n_flags & RATE_MCS_FAT_MSK) || |
569 | (rate_n_flags & RATE_MCS_DUP_MSK)) | |
b481de9c ZY |
570 | tbl->is_fat = 1; |
571 | ||
39e88504 | 572 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
b481de9c | 573 | tbl->is_dup = 1; |
fde0db31 | 574 | |
39e88504 | 575 | mcs = rs_extract_rate(rate_n_flags); |
fde0db31 | 576 | |
39e88504 GC |
577 | /* SISO */ |
578 | if (mcs <= IWL_RATE_SISO_60M_PLCP) { | |
fde0db31 GC |
579 | if (num_of_ant == 1) |
580 | tbl->lq_type = LQ_SISO; /*else NONE*/ | |
581 | /* MIMO2 */ | |
39e88504 | 582 | } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
fde0db31 GC |
583 | if (num_of_ant == 2) |
584 | tbl->lq_type = LQ_MIMO2; | |
585 | /* MIMO3 */ | |
586 | } else { | |
587 | if (num_of_ant == 3) | |
588 | tbl->lq_type = LQ_MIMO3; | |
589 | } | |
b481de9c ZY |
590 | } |
591 | return 0; | |
592 | } | |
aade00ce GC |
593 | |
594 | /* switch to another antenna/antennas and return 1 */ | |
595 | /* if no other valid antenna found, return 0 */ | |
596 | static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, | |
597 | struct iwl4965_scale_tbl_info *tbl) | |
b481de9c | 598 | { |
aade00ce GC |
599 | u8 new_ant_type; |
600 | ||
601 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
602 | return 0; | |
603 | ||
604 | if (!rs_is_valid_ant(valid_ant, tbl->ant_type)) | |
605 | return 0; | |
606 | ||
607 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
608 | ||
609 | while ((new_ant_type != tbl->ant_type) && | |
610 | !rs_is_valid_ant(valid_ant, new_ant_type)) | |
611 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
612 | ||
613 | if (new_ant_type == tbl->ant_type) | |
614 | return 0; | |
615 | ||
616 | tbl->ant_type = new_ant_type; | |
617 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
618 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
619 | return 1; | |
b481de9c ZY |
620 | } |
621 | ||
39e88504 | 622 | /* FIXME:RS: in 4965 we don't use greenfield at all */ |
c79dd5b5 | 623 | static inline u8 rs_use_green(struct iwl_priv *priv, |
270243a5 | 624 | struct ieee80211_conf *conf) |
b481de9c | 625 | { |
c8b0e6e1 | 626 | #ifdef CONFIG_IWL4965_HT |
270243a5 RR |
627 | return ((conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) && |
628 | priv->current_ht_config.is_green_field && | |
629 | !priv->current_ht_config.non_GF_STA_present); | |
39e88504 | 630 | #else |
dc2453ae | 631 | return 0; |
39e88504 | 632 | #endif /* CONFIG_IWL4965_HT */ |
b481de9c ZY |
633 | } |
634 | ||
635 | /** | |
636 | * rs_get_supported_rates - get the available rates | |
637 | * | |
638 | * if management frame or broadcast frame only return | |
639 | * basic available rates. | |
640 | * | |
641 | */ | |
eecd6e57 | 642 | static u16 rs_get_supported_rates(struct iwl4965_lq_sta *lq_sta, |
b481de9c | 643 | struct ieee80211_hdr *hdr, |
eecd6e57 | 644 | enum iwl_table_type rate_type) |
b481de9c | 645 | { |
eecd6e57 GC |
646 | if (hdr && is_multicast_ether_addr(hdr->addr1) && |
647 | lq_sta->active_rate_basic) | |
648 | return lq_sta->active_rate_basic; | |
649 | ||
650 | if (is_legacy(rate_type)) { | |
651 | return lq_sta->active_legacy_rate; | |
652 | } else { | |
b481de9c | 653 | if (is_siso(rate_type)) |
eecd6e57 | 654 | return lq_sta->active_siso_rate; |
fde0db31 | 655 | else if (is_mimo2(rate_type)) |
eecd6e57 | 656 | return lq_sta->active_mimo2_rate; |
b481de9c | 657 | else |
eecd6e57 | 658 | return lq_sta->active_mimo3_rate; |
c33104f0 | 659 | } |
b481de9c ZY |
660 | } |
661 | ||
662 | static u16 rs_get_adjacent_rate(u8 index, u16 rate_mask, int rate_type) | |
663 | { | |
664 | u8 high = IWL_RATE_INVALID; | |
665 | u8 low = IWL_RATE_INVALID; | |
666 | ||
01ebd063 | 667 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
668 | * the rate table */ |
669 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
670 | int i; | |
671 | u32 mask; | |
672 | ||
673 | /* Find the previous rate that is in the rate mask */ | |
674 | i = index - 1; | |
675 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
676 | if (rate_mask & mask) { | |
677 | low = i; | |
678 | break; | |
679 | } | |
680 | } | |
681 | ||
682 | /* Find the next rate that is in the rate mask */ | |
683 | i = index + 1; | |
684 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
685 | if (rate_mask & mask) { | |
686 | high = i; | |
687 | break; | |
688 | } | |
689 | } | |
690 | ||
691 | return (high << 8) | low; | |
692 | } | |
693 | ||
694 | low = index; | |
695 | while (low != IWL_RATE_INVALID) { | |
bb8c093b | 696 | low = iwl4965_rates[low].prev_rs; |
b481de9c ZY |
697 | if (low == IWL_RATE_INVALID) |
698 | break; | |
699 | if (rate_mask & (1 << low)) | |
700 | break; | |
701 | IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low); | |
702 | } | |
703 | ||
704 | high = index; | |
705 | while (high != IWL_RATE_INVALID) { | |
bb8c093b | 706 | high = iwl4965_rates[high].next_rs; |
b481de9c ZY |
707 | if (high == IWL_RATE_INVALID) |
708 | break; | |
709 | if (rate_mask & (1 << high)) | |
710 | break; | |
711 | IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high); | |
712 | } | |
713 | ||
714 | return (high << 8) | low; | |
715 | } | |
716 | ||
39e88504 | 717 | static u32 rs_get_lower_rate(struct iwl4965_lq_sta *lq_sta, |
bb8c093b | 718 | struct iwl4965_scale_tbl_info *tbl, u8 scale_index, |
39e88504 | 719 | u8 ht_possible) |
b481de9c | 720 | { |
b481de9c ZY |
721 | s32 low; |
722 | u16 rate_mask; | |
723 | u16 high_low; | |
724 | u8 switch_to_legacy = 0; | |
c33104f0 | 725 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
726 | |
727 | /* check if we need to switch from HT to legacy rates. | |
728 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
729 | * are always supported (spec demand) */ | |
730 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
731 | switch_to_legacy = 1; | |
732 | scale_index = rs_ht_to_legacy[scale_index]; | |
8318d78a | 733 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
734 | tbl->lq_type = LQ_A; |
735 | else | |
736 | tbl->lq_type = LQ_G; | |
737 | ||
fde0db31 GC |
738 | if (num_of_ant(tbl->ant_type > 1)) |
739 | tbl->ant_type = ANT_A;/*FIXME:RS*/ | |
b481de9c ZY |
740 | |
741 | tbl->is_fat = 0; | |
742 | tbl->is_SGI = 0; | |
743 | } | |
744 | ||
eecd6e57 | 745 | rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
b481de9c | 746 | |
77626355 | 747 | /* Mask with station rate restriction */ |
b481de9c | 748 | if (is_legacy(tbl->lq_type)) { |
77626355 | 749 | /* supp_rates has no CCK bits in A mode */ |
8318d78a | 750 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c | 751 | rate_mask = (u16)(rate_mask & |
c33104f0 | 752 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 753 | else |
c33104f0 | 754 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
755 | } |
756 | ||
77626355 | 757 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 758 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
39e88504 GC |
759 | low = scale_index; |
760 | goto out; | |
b481de9c ZY |
761 | } |
762 | ||
763 | high_low = rs_get_adjacent_rate(scale_index, rate_mask, tbl->lq_type); | |
764 | low = high_low & 0xff; | |
765 | ||
39e88504 GC |
766 | if (low == IWL_RATE_INVALID) |
767 | low = scale_index; | |
768 | ||
769 | out: | |
770 | return rate_n_flags_from_tbl(tbl, low, is_green); | |
b481de9c ZY |
771 | } |
772 | ||
77626355 BC |
773 | /* |
774 | * mac80211 sends us Tx status | |
775 | */ | |
c33104f0 | 776 | static void rs_tx_status(void *priv_rate, struct net_device *dev, |
b481de9c ZY |
777 | struct sk_buff *skb, |
778 | struct ieee80211_tx_status *tx_resp) | |
779 | { | |
780 | int status; | |
781 | u8 retries; | |
782 | int rs_index, index = 0; | |
c33104f0 | 783 | struct iwl4965_lq_sta *lq_sta; |
66c73db7 | 784 | struct iwl_link_quality_cmd *table; |
b481de9c ZY |
785 | struct sta_info *sta; |
786 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
c79dd5b5 | 787 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
b481de9c | 788 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
4c424e4c | 789 | struct ieee80211_hw *hw = local_to_hw(local); |
bb8c093b CH |
790 | struct iwl4965_rate_scale_data *window = NULL; |
791 | struct iwl4965_rate_scale_data *search_win = NULL; | |
39e88504 | 792 | u32 tx_rate; |
bb8c093b CH |
793 | struct iwl4965_scale_tbl_info tbl_type; |
794 | struct iwl4965_scale_tbl_info *curr_tbl, *search_tbl; | |
b481de9c ZY |
795 | u8 active_index = 0; |
796 | u16 fc = le16_to_cpu(hdr->frame_control); | |
797 | s32 tpt = 0; | |
798 | ||
58826351 | 799 | IWL_DEBUG_RATE_LIMIT("get frame ack response, update rate scale window\n"); |
b481de9c ZY |
800 | |
801 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) | |
802 | return; | |
803 | ||
99556438 RR |
804 | /* This packet was aggregated but doesn't carry rate scale info */ |
805 | if ((tx_resp->control.flags & IEEE80211_TXCTL_AMPDU) && | |
806 | !(tx_resp->flags & IEEE80211_TX_STATUS_AMPDU)) | |
807 | return; | |
808 | ||
b481de9c ZY |
809 | retries = tx_resp->retry_count; |
810 | ||
811 | if (retries > 15) | |
812 | retries = 15; | |
813 | ||
d0709a65 | 814 | rcu_read_lock(); |
b481de9c ZY |
815 | |
816 | sta = sta_info_get(local, hdr->addr1); | |
817 | ||
f4d6082d TW |
818 | if (!sta || !sta->rate_ctrl_priv) |
819 | goto out; | |
820 | ||
b481de9c | 821 | |
c33104f0 | 822 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
b481de9c ZY |
823 | |
824 | if (!priv->lq_mngr.lq_ready) | |
f4d6082d | 825 | goto out; |
b481de9c | 826 | |
c33104f0 TW |
827 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && |
828 | !lq_sta->ibss_sta_added) | |
f4d6082d | 829 | goto out; |
b481de9c | 830 | |
c33104f0 TW |
831 | table = &lq_sta->lq; |
832 | active_index = lq_sta->active_tbl; | |
b481de9c | 833 | |
c33104f0 TW |
834 | curr_tbl = &(lq_sta->lq_info[active_index]); |
835 | search_tbl = &(lq_sta->lq_info[(1 - active_index)]); | |
bb8c093b | 836 | window = (struct iwl4965_rate_scale_data *) |
b481de9c | 837 | &(curr_tbl->win[0]); |
bb8c093b | 838 | search_win = (struct iwl4965_rate_scale_data *) |
b481de9c ZY |
839 | &(search_tbl->win[0]); |
840 | ||
77626355 BC |
841 | /* |
842 | * Ignore this Tx frame response if its initial rate doesn't match | |
843 | * that of latest Link Quality command. There may be stragglers | |
844 | * from a previous Link Quality command, but we're no longer interested | |
845 | * in those; they're either from the "active" mode while we're trying | |
846 | * to check "search" mode, or a prior "search" mode after we've moved | |
847 | * to a new "search" mode (which might become the new "active" mode). | |
848 | */ | |
39e88504 GC |
849 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
850 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
4c424e4c RR |
851 | if (priv->band == IEEE80211_BAND_5GHZ) |
852 | rs_index -= IWL_FIRST_OFDM_RATE; | |
853 | ||
854 | if ((tx_resp->control.tx_rate == NULL) || | |
855 | (tbl_type.is_SGI ^ | |
856 | !!(tx_resp->control.flags & IEEE80211_TXCTL_SHORT_GI)) || | |
857 | (tbl_type.is_fat ^ | |
858 | !!(tx_resp->control.flags & IEEE80211_TXCTL_40_MHZ_WIDTH)) || | |
859 | (tbl_type.is_dup ^ | |
860 | !!(tx_resp->control.flags & IEEE80211_TXCTL_DUP_DATA)) || | |
fde0db31 | 861 | (tbl_type.ant_type ^ tx_resp->control.antenna_sel_tx) || |
39e88504 | 862 | (!!(tx_rate & RATE_MCS_HT_MSK) ^ |
4c424e4c | 863 | !!(tx_resp->control.flags & IEEE80211_TXCTL_OFDM_HT)) || |
39e88504 | 864 | (!!(tx_rate & RATE_MCS_GF_MSK) ^ |
4c424e4c RR |
865 | !!(tx_resp->control.flags & IEEE80211_TXCTL_GREEN_FIELD)) || |
866 | (hw->wiphy->bands[priv->band]->bitrates[rs_index].bitrate != | |
867 | tx_resp->control.tx_rate->bitrate)) { | |
39e88504 | 868 | IWL_DEBUG_RATE("initial rate does not match 0x%x\n", tx_rate); |
f4d6082d | 869 | goto out; |
b481de9c ZY |
870 | } |
871 | ||
77626355 | 872 | /* Update frame history window with "failure" for each Tx retry. */ |
b481de9c | 873 | while (retries) { |
77626355 BC |
874 | /* Look up the rate and other info used for each tx attempt. |
875 | * Each tx attempt steps one entry deeper in the rate table. */ | |
39e88504 GC |
876 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
877 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, | |
b481de9c ZY |
878 | &tbl_type, &rs_index); |
879 | ||
77626355 BC |
880 | /* If type matches "search" table, |
881 | * add failure to "search" history */ | |
b481de9c | 882 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 883 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
884 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
885 | if (search_tbl->expected_tpt) | |
886 | tpt = search_tbl->expected_tpt[rs_index]; | |
887 | else | |
888 | tpt = 0; | |
99556438 | 889 | rs_collect_tx_data(search_win, rs_index, tpt, 1, 0); |
77626355 BC |
890 | |
891 | /* Else if type matches "current/active" table, | |
892 | * add failure to "current/active" history */ | |
b481de9c | 893 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 894 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
895 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
896 | if (curr_tbl->expected_tpt) | |
897 | tpt = curr_tbl->expected_tpt[rs_index]; | |
898 | else | |
899 | tpt = 0; | |
99556438 | 900 | rs_collect_tx_data(window, rs_index, tpt, 1, 0); |
b481de9c | 901 | } |
77626355 BC |
902 | |
903 | /* If not searching for a new mode, increment failed counter | |
904 | * ... this helps determine when to start searching again */ | |
c33104f0 TW |
905 | if (lq_sta->stay_in_tbl) |
906 | lq_sta->total_failed++; | |
b481de9c ZY |
907 | --retries; |
908 | index++; | |
909 | ||
910 | } | |
911 | ||
77626355 BC |
912 | /* |
913 | * Find (by rate) the history window to update with final Tx attempt; | |
914 | * if Tx was successful first try, use original rate, | |
915 | * else look up the rate that was, finally, successful. | |
916 | */ | |
39e88504 GC |
917 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
918 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
b481de9c | 919 | |
77626355 | 920 | /* Update frame history window with "success" if Tx got ACKed ... */ |
b481de9c ZY |
921 | if (tx_resp->flags & IEEE80211_TX_STATUS_ACK) |
922 | status = 1; | |
923 | else | |
924 | status = 0; | |
925 | ||
77626355 BC |
926 | /* If type matches "search" table, |
927 | * add final tx status to "search" history */ | |
b481de9c | 928 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 929 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
930 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
931 | if (search_tbl->expected_tpt) | |
932 | tpt = search_tbl->expected_tpt[rs_index]; | |
933 | else | |
934 | tpt = 0; | |
99556438 RR |
935 | if (tx_resp->control.flags & IEEE80211_TXCTL_AMPDU) |
936 | rs_collect_tx_data(search_win, rs_index, tpt, | |
937 | tx_resp->ampdu_ack_len, | |
938 | tx_resp->ampdu_ack_map); | |
939 | else | |
940 | rs_collect_tx_data(search_win, rs_index, tpt, | |
941 | 1, status); | |
77626355 BC |
942 | /* Else if type matches "current/active" table, |
943 | * add final tx status to "current/active" history */ | |
b481de9c | 944 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 945 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
946 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
947 | if (curr_tbl->expected_tpt) | |
948 | tpt = curr_tbl->expected_tpt[rs_index]; | |
949 | else | |
950 | tpt = 0; | |
99556438 RR |
951 | if (tx_resp->control.flags & IEEE80211_TXCTL_AMPDU) |
952 | rs_collect_tx_data(window, rs_index, tpt, | |
953 | tx_resp->ampdu_ack_len, | |
954 | tx_resp->ampdu_ack_map); | |
955 | else | |
956 | rs_collect_tx_data(window, rs_index, tpt, | |
957 | 1, status); | |
b481de9c ZY |
958 | } |
959 | ||
77626355 BC |
960 | /* If not searching for new mode, increment success/failed counter |
961 | * ... these help determine when to start searching again */ | |
c33104f0 | 962 | if (lq_sta->stay_in_tbl) { |
99556438 RR |
963 | if (tx_resp->control.flags & IEEE80211_TXCTL_AMPDU) { |
964 | lq_sta->total_success += tx_resp->ampdu_ack_map; | |
965 | lq_sta->total_failed += | |
966 | (tx_resp->ampdu_ack_len - tx_resp->ampdu_ack_map); | |
967 | } else { | |
968 | if (status) | |
969 | lq_sta->total_success++; | |
970 | else | |
971 | lq_sta->total_failed++; | |
972 | } | |
b481de9c ZY |
973 | } |
974 | ||
77626355 | 975 | /* See if there's a better rate or modulation mode to try. */ |
b481de9c | 976 | rs_rate_scale_perform(priv, dev, hdr, sta); |
f4d6082d | 977 | out: |
d0709a65 | 978 | rcu_read_unlock(); |
b481de9c ZY |
979 | return; |
980 | } | |
981 | ||
77626355 BC |
982 | /* |
983 | * Begin a period of staying with a selected modulation mode. | |
984 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
985 | * Set frame tx success limits according to legacy vs. high-throughput, | |
986 | * and reset overall (spanning all rates) tx success history statistics. | |
987 | * These control how long we stay using same modulation mode before | |
988 | * searching for a new mode. | |
989 | */ | |
b481de9c | 990 | static void rs_set_stay_in_table(u8 is_legacy, |
c33104f0 | 991 | struct iwl4965_lq_sta *lq_sta) |
b481de9c | 992 | { |
eecd6e57 | 993 | IWL_DEBUG_RATE("we are staying in the same table\n"); |
c33104f0 | 994 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 995 | if (is_legacy) { |
c33104f0 TW |
996 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
997 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
998 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 999 | } else { |
c33104f0 TW |
1000 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
1001 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
1002 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 1003 | } |
c33104f0 TW |
1004 | lq_sta->table_count = 0; |
1005 | lq_sta->total_failed = 0; | |
1006 | lq_sta->total_success = 0; | |
b481de9c ZY |
1007 | } |
1008 | ||
77626355 BC |
1009 | /* |
1010 | * Find correct throughput table for given mode of modulation | |
1011 | */ | |
eecd6e57 | 1012 | static void rs_set_expected_tpt_table(struct iwl4965_lq_sta *lq_sta, |
bb8c093b | 1013 | struct iwl4965_scale_tbl_info *tbl) |
b481de9c ZY |
1014 | { |
1015 | if (is_legacy(tbl->lq_type)) { | |
1016 | if (!is_a_band(tbl->lq_type)) | |
1017 | tbl->expected_tpt = expected_tpt_G; | |
1018 | else | |
1019 | tbl->expected_tpt = expected_tpt_A; | |
1020 | } else if (is_siso(tbl->lq_type)) { | |
c33104f0 | 1021 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1022 | if (tbl->is_SGI) |
1023 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
1024 | else | |
1025 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
1026 | else if (tbl->is_SGI) | |
1027 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
1028 | else | |
1029 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
1030 | ||
fde0db31 | 1031 | } else if (is_mimo(tbl->lq_type)) { /* FIXME:need to separate mimo2/3 */ |
c33104f0 | 1032 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1033 | if (tbl->is_SGI) |
1034 | tbl->expected_tpt = expected_tpt_mimo40MHzSGI; | |
1035 | else | |
1036 | tbl->expected_tpt = expected_tpt_mimo40MHz; | |
1037 | else if (tbl->is_SGI) | |
1038 | tbl->expected_tpt = expected_tpt_mimo20MHzSGI; | |
1039 | else | |
1040 | tbl->expected_tpt = expected_tpt_mimo20MHz; | |
1041 | } else | |
1042 | tbl->expected_tpt = expected_tpt_G; | |
1043 | } | |
1044 | ||
c8b0e6e1 | 1045 | #ifdef CONFIG_IWL4965_HT |
77626355 BC |
1046 | /* |
1047 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1048 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1049 | * above the current measured throughput of "active" mode, to give new mode | |
1050 | * a fair chance to prove itself without too many challenges. | |
1051 | * | |
1052 | * This gets called when transitioning to more aggressive modulation | |
1053 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1054 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1055 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1056 | * bit rate will typically need to increase, but not if performance was bad. | |
1057 | */ | |
c79dd5b5 | 1058 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
c33104f0 | 1059 | struct iwl4965_lq_sta *lq_sta, |
77626355 | 1060 | struct iwl4965_scale_tbl_info *tbl, /* "search" */ |
b481de9c ZY |
1061 | u16 rate_mask, s8 index, s8 rate) |
1062 | { | |
77626355 | 1063 | /* "active" values */ |
bb8c093b | 1064 | struct iwl4965_scale_tbl_info *active_tbl = |
c33104f0 | 1065 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1066 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1067 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 BC |
1068 | |
1069 | /* expected "search" throughput */ | |
1070 | s32 *tpt_tbl = tbl->expected_tpt; | |
1071 | ||
1072 | s32 new_rate, high, low, start_hi; | |
b481de9c ZY |
1073 | u16 high_low; |
1074 | ||
1075 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1076 | ||
1077 | for (; ;) { | |
1078 | high_low = rs_get_adjacent_rate(rate, rate_mask, tbl->lq_type); | |
1079 | ||
1080 | low = high_low & 0xff; | |
1081 | high = (high_low >> 8) & 0xff; | |
1082 | ||
77626355 BC |
1083 | /* |
1084 | * Lower the "search" bit rate, to give new "search" mode | |
1085 | * approximately the same throughput as "active" if: | |
1086 | * | |
1087 | * 1) "Active" mode has been working modestly well (but not | |
1088 | * great), and expected "search" throughput (under perfect | |
1089 | * conditions) at candidate rate is above the actual | |
1090 | * measured "active" throughput (but less than expected | |
1091 | * "active" throughput under perfect conditions). | |
1092 | * OR | |
1093 | * 2) "Active" mode has been working perfectly or very well | |
1094 | * and expected "search" throughput (under perfect | |
1095 | * conditions) at candidate rate is above expected | |
1096 | * "active" throughput (under perfect conditions). | |
1097 | */ | |
c33104f0 | 1098 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1099 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1100 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1101 | (tpt_tbl[rate] <= active_tpt))) || | |
1102 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1103 | (tpt_tbl[rate] > active_tpt))) { | |
1104 | ||
77626355 BC |
1105 | /* (2nd or later pass) |
1106 | * If we've already tried to raise the rate, and are | |
1107 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1108 | if (start_hi != IWL_RATE_INVALID) { |
1109 | new_rate = start_hi; | |
1110 | break; | |
1111 | } | |
77626355 | 1112 | |
b481de9c | 1113 | new_rate = rate; |
77626355 BC |
1114 | |
1115 | /* Loop again with lower rate */ | |
b481de9c ZY |
1116 | if (low != IWL_RATE_INVALID) |
1117 | rate = low; | |
77626355 BC |
1118 | |
1119 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1120 | else |
1121 | break; | |
77626355 BC |
1122 | |
1123 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1124 | } else { |
77626355 BC |
1125 | /* (2nd or later pass) |
1126 | * If we've already tried to lower the rate, and are | |
1127 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1128 | if (new_rate != IWL_RATE_INVALID) |
1129 | break; | |
77626355 BC |
1130 | |
1131 | /* Loop again with higher rate */ | |
b481de9c ZY |
1132 | else if (high != IWL_RATE_INVALID) { |
1133 | start_hi = high; | |
1134 | rate = high; | |
77626355 BC |
1135 | |
1136 | /* Higher rate not available, use the original */ | |
b481de9c ZY |
1137 | } else { |
1138 | new_rate = rate; | |
1139 | break; | |
1140 | } | |
1141 | } | |
1142 | } | |
1143 | ||
1144 | return new_rate; | |
1145 | } | |
c8b0e6e1 | 1146 | #endif /* CONFIG_IWL4965_HT */ |
b481de9c | 1147 | |
77626355 BC |
1148 | /* |
1149 | * Set up search table for MIMO | |
1150 | */ | |
fde0db31 GC |
1151 | #ifdef CONFIG_IWL4965_HT |
1152 | static int rs_switch_to_mimo2(struct iwl_priv *priv, | |
c33104f0 | 1153 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1154 | struct ieee80211_conf *conf, |
1155 | struct sta_info *sta, | |
bb8c093b | 1156 | struct iwl4965_scale_tbl_info *tbl, int index) |
b481de9c | 1157 | { |
b481de9c ZY |
1158 | u16 rate_mask; |
1159 | s32 rate; | |
c33104f0 | 1160 | s8 is_green = lq_sta->is_green; |
b481de9c | 1161 | |
270243a5 RR |
1162 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
1163 | !sta->ht_info.ht_supported) | |
b481de9c ZY |
1164 | return -1; |
1165 | ||
270243a5 | 1166 | if (priv->current_ht_config.tx_mimo_ps_mode == IWL_MIMO_PS_STATIC) |
b481de9c ZY |
1167 | return -1; |
1168 | ||
77626355 | 1169 | /* Need both Tx chains/antennas to support MIMO */ |
aade00ce | 1170 | if (priv->hw_params.tx_chains_num < 2) |
b481de9c ZY |
1171 | return -1; |
1172 | ||
eecd6e57 | 1173 | IWL_DEBUG_RATE("LQ: try to switch to MIMO2\n"); |
39e88504 GC |
1174 | |
1175 | tbl->lq_type = LQ_MIMO2; | |
c33104f0 | 1176 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1177 | tbl->action = 0; |
39e88504 GC |
1178 | rate_mask = lq_sta->active_mimo2_rate; |
1179 | ||
270243a5 | 1180 | if (priv->current_ht_config.supported_chan_width |
39e88504 | 1181 | == IWL_CHANNEL_WIDTH_40MHZ) |
b481de9c ZY |
1182 | tbl->is_fat = 1; |
1183 | else | |
1184 | tbl->is_fat = 0; | |
1185 | ||
39e88504 | 1186 | /* FIXME: - don't toggle SGI here |
b481de9c | 1187 | if (tbl->is_fat) { |
270243a5 | 1188 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1189 | tbl->is_SGI = 1; |
1190 | else | |
1191 | tbl->is_SGI = 0; | |
270243a5 | 1192 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1193 | tbl->is_SGI = 1; |
1194 | else | |
1195 | tbl->is_SGI = 0; | |
39e88504 | 1196 | */ |
b481de9c | 1197 | |
eecd6e57 | 1198 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1199 | |
c33104f0 | 1200 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index, index); |
b481de9c | 1201 | |
eecd6e57 | 1202 | IWL_DEBUG_RATE("LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
39e88504 GC |
1203 | |
1204 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { | |
eecd6e57 | 1205 | IWL_DEBUG_RATE("Can't switch with index %d rate mask %x\n", |
39e88504 | 1206 | rate, rate_mask); |
b481de9c | 1207 | return -1; |
39e88504 GC |
1208 | } |
1209 | tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green); | |
b481de9c | 1210 | |
eecd6e57 | 1211 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1212 | tbl->current_rate, is_green); |
dc2453ae | 1213 | return 0; |
fde0db31 | 1214 | } |
403ab56b | 1215 | #else |
fde0db31 GC |
1216 | static int rs_switch_to_mimo2(struct iwl_priv *priv, |
1217 | struct iwl4965_lq_sta *lq_sta, | |
1218 | struct ieee80211_conf *conf, | |
1219 | struct sta_info *sta, | |
1220 | struct iwl4965_scale_tbl_info *tbl, int index) | |
1221 | { | |
403ab56b | 1222 | return -1; |
b481de9c | 1223 | } |
fde0db31 | 1224 | #endif /*CONFIG_IWL4965_HT */ |
b481de9c | 1225 | |
77626355 BC |
1226 | /* |
1227 | * Set up search table for SISO | |
1228 | */ | |
c79dd5b5 | 1229 | static int rs_switch_to_siso(struct iwl_priv *priv, |
c33104f0 | 1230 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1231 | struct ieee80211_conf *conf, |
1232 | struct sta_info *sta, | |
bb8c093b | 1233 | struct iwl4965_scale_tbl_info *tbl, int index) |
b481de9c | 1234 | { |
c8b0e6e1 | 1235 | #ifdef CONFIG_IWL4965_HT |
b481de9c | 1236 | u16 rate_mask; |
c33104f0 | 1237 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
1238 | s32 rate; |
1239 | ||
270243a5 RR |
1240 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
1241 | !sta->ht_info.ht_supported) | |
b481de9c ZY |
1242 | return -1; |
1243 | ||
eecd6e57 | 1244 | IWL_DEBUG_RATE("LQ: try to switch to SISO\n"); |
39e88504 | 1245 | |
c33104f0 | 1246 | tbl->is_dup = lq_sta->is_dup; |
b481de9c ZY |
1247 | tbl->lq_type = LQ_SISO; |
1248 | tbl->action = 0; | |
39e88504 | 1249 | rate_mask = lq_sta->active_siso_rate; |
b481de9c | 1250 | |
270243a5 RR |
1251 | if (priv->current_ht_config.supported_chan_width |
1252 | == IWL_CHANNEL_WIDTH_40MHZ) | |
b481de9c ZY |
1253 | tbl->is_fat = 1; |
1254 | else | |
1255 | tbl->is_fat = 0; | |
1256 | ||
39e88504 | 1257 | /* FIXME: - don't toggle SGI here |
b481de9c | 1258 | if (tbl->is_fat) { |
270243a5 | 1259 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1260 | tbl->is_SGI = 1; |
1261 | else | |
1262 | tbl->is_SGI = 0; | |
270243a5 | 1263 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1264 | tbl->is_SGI = 1; |
1265 | else | |
1266 | tbl->is_SGI = 0; | |
39e88504 | 1267 | */ |
b481de9c ZY |
1268 | |
1269 | if (is_green) | |
39e88504 | 1270 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ |
b481de9c | 1271 | |
eecd6e57 | 1272 | rs_set_expected_tpt_table(lq_sta, tbl); |
c33104f0 | 1273 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index, index); |
b481de9c | 1274 | |
eecd6e57 | 1275 | IWL_DEBUG_RATE("LQ: get best rate %d mask %X\n", rate, rate_mask); |
b481de9c | 1276 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
eecd6e57 | 1277 | IWL_DEBUG_RATE("can not switch with index %d rate mask %x\n", |
b481de9c ZY |
1278 | rate, rate_mask); |
1279 | return -1; | |
1280 | } | |
39e88504 | 1281 | tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green); |
eecd6e57 | 1282 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1283 | tbl->current_rate, is_green); |
403ab56b MA |
1284 | return 0; |
1285 | #else | |
1286 | return -1; | |
b481de9c | 1287 | |
0c11b4de | 1288 | #endif /*CONFIG_IWL4965_HT */ |
b481de9c ZY |
1289 | } |
1290 | ||
77626355 BC |
1291 | /* |
1292 | * Try to switch to new modulation mode from legacy | |
1293 | */ | |
c79dd5b5 | 1294 | static int rs_move_legacy_other(struct iwl_priv *priv, |
c33104f0 | 1295 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1296 | struct ieee80211_conf *conf, |
1297 | struct sta_info *sta, | |
b481de9c ZY |
1298 | int index) |
1299 | { | |
bb8c093b | 1300 | struct iwl4965_scale_tbl_info *tbl = |
c33104f0 | 1301 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
bb8c093b | 1302 | struct iwl4965_scale_tbl_info *search_tbl = |
c33104f0 | 1303 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
bb8c093b CH |
1304 | struct iwl4965_rate_scale_data *window = &(tbl->win[index]); |
1305 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - | |
1306 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1307 | u8 start_action = tbl->action; |
fde0db31 GC |
1308 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1309 | int ret = 0; | |
b481de9c ZY |
1310 | |
1311 | for (; ;) { | |
1312 | switch (tbl->action) { | |
1313 | case IWL_LEGACY_SWITCH_ANTENNA: | |
eecd6e57 | 1314 | IWL_DEBUG_RATE("LQ Legacy toggle Antenna\n"); |
b481de9c | 1315 | |
c33104f0 | 1316 | lq_sta->action_counter++; |
77626355 BC |
1317 | |
1318 | /* Don't change antenna if success has been great */ | |
39e88504 | 1319 | /*FIXME:RS:not sure this is really needed*/ |
b481de9c ZY |
1320 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1321 | break; | |
77626355 | 1322 | |
77626355 | 1323 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1324 | memcpy(search_tbl, tbl, sz); |
1325 | ||
aade00ce GC |
1326 | if (rs_toggle_antenna(valid_tx_ant, |
1327 | &search_tbl->current_rate, search_tbl)) { | |
1328 | rs_set_expected_tpt_table(lq_sta, search_tbl); | |
1329 | lq_sta->search_better_tbl = 1; | |
1330 | goto out; | |
1331 | } | |
b481de9c ZY |
1332 | |
1333 | case IWL_LEGACY_SWITCH_SISO: | |
eecd6e57 | 1334 | IWL_DEBUG_RATE("LQ: Legacy switch to SISO\n"); |
77626355 BC |
1335 | |
1336 | /* Set up search table to try SISO */ | |
b481de9c | 1337 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1338 | search_tbl->is_SGI = 0; |
c33104f0 | 1339 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1340 | search_tbl, index); |
dc2453ae | 1341 | if (!ret) { |
c33104f0 TW |
1342 | lq_sta->search_better_tbl = 1; |
1343 | lq_sta->action_counter = 0; | |
b481de9c | 1344 | goto out; |
dc2453ae | 1345 | } |
b481de9c ZY |
1346 | |
1347 | break; | |
fde0db31 | 1348 | case IWL_LEGACY_SWITCH_MIMO2: |
eecd6e57 | 1349 | IWL_DEBUG_RATE("LQ: Legacy switch to MIMO2\n"); |
77626355 BC |
1350 | |
1351 | /* Set up search table to try MIMO */ | |
b481de9c | 1352 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1353 | search_tbl->is_SGI = 0; |
fde0db31 GC |
1354 | search_tbl->ant_type = ANT_AB;/*FIXME:RS*/ |
1355 | /*FIXME:RS:need to check ant validity*/ | |
1356 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, | |
270243a5 | 1357 | search_tbl, index); |
dc2453ae | 1358 | if (!ret) { |
c33104f0 TW |
1359 | lq_sta->search_better_tbl = 1; |
1360 | lq_sta->action_counter = 0; | |
b481de9c | 1361 | goto out; |
dc2453ae | 1362 | } |
b481de9c ZY |
1363 | break; |
1364 | } | |
1365 | tbl->action++; | |
fde0db31 | 1366 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2) |
b481de9c ZY |
1367 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; |
1368 | ||
1369 | if (tbl->action == start_action) | |
1370 | break; | |
1371 | ||
1372 | } | |
1373 | return 0; | |
1374 | ||
1375 | out: | |
1376 | tbl->action++; | |
fde0db31 | 1377 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2) |
b481de9c ZY |
1378 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; |
1379 | return 0; | |
1380 | ||
1381 | } | |
1382 | ||
77626355 BC |
1383 | /* |
1384 | * Try to switch to new modulation mode from SISO | |
1385 | */ | |
c79dd5b5 | 1386 | static int rs_move_siso_to_other(struct iwl_priv *priv, |
c33104f0 | 1387 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1388 | struct ieee80211_conf *conf, |
1389 | struct sta_info *sta, | |
b481de9c ZY |
1390 | int index) |
1391 | { | |
c33104f0 | 1392 | u8 is_green = lq_sta->is_green; |
bb8c093b | 1393 | struct iwl4965_scale_tbl_info *tbl = |
c33104f0 | 1394 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
bb8c093b | 1395 | struct iwl4965_scale_tbl_info *search_tbl = |
c33104f0 | 1396 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
bb8c093b CH |
1397 | struct iwl4965_rate_scale_data *window = &(tbl->win[index]); |
1398 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - | |
1399 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1400 | u8 start_action = tbl->action; |
fde0db31 GC |
1401 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1402 | int ret; | |
b481de9c ZY |
1403 | |
1404 | for (;;) { | |
c33104f0 | 1405 | lq_sta->action_counter++; |
b481de9c ZY |
1406 | switch (tbl->action) { |
1407 | case IWL_SISO_SWITCH_ANTENNA: | |
eecd6e57 | 1408 | IWL_DEBUG_RATE("LQ: SISO toggle Antenna\n"); |
39e88504 | 1409 | /*FIXME:RS: is this really needed for SISO?*/ |
b481de9c ZY |
1410 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1411 | break; | |
b481de9c ZY |
1412 | |
1413 | memcpy(search_tbl, tbl, sz); | |
aade00ce GC |
1414 | if (rs_toggle_antenna(valid_tx_ant, |
1415 | &search_tbl->current_rate, search_tbl)) { | |
1416 | lq_sta->search_better_tbl = 1; | |
1417 | goto out; | |
1418 | } | |
b481de9c | 1419 | |
fde0db31 | 1420 | case IWL_SISO_SWITCH_MIMO2: |
eecd6e57 | 1421 | IWL_DEBUG_RATE("LQ: SISO switch to MIMO\n"); |
b481de9c | 1422 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1423 | search_tbl->is_SGI = 0; |
fde0db31 GC |
1424 | search_tbl->ant_type = ANT_AB; /*FIXME:RS*/ |
1425 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, | |
270243a5 | 1426 | search_tbl, index); |
dc2453ae | 1427 | if (!ret) { |
c33104f0 | 1428 | lq_sta->search_better_tbl = 1; |
b481de9c | 1429 | goto out; |
dc2453ae | 1430 | } |
b481de9c ZY |
1431 | break; |
1432 | case IWL_SISO_SWITCH_GI: | |
eecd6e57 | 1433 | IWL_DEBUG_RATE("LQ: SISO toggle SGI/NGI\n"); |
0c11b4de | 1434 | |
b481de9c | 1435 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1436 | if (is_green) { |
1437 | if (!tbl->is_SGI) | |
1438 | break; | |
1439 | else | |
1440 | IWL_ERROR("SGI was set in GF+SISO\n"); | |
b481de9c | 1441 | } |
39e88504 | 1442 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1443 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
39e88504 GC |
1444 | if (tbl->is_SGI) { |
1445 | s32 tpt = lq_sta->last_tpt / 100; | |
1446 | if (tpt >= search_tbl->expected_tpt[index]) | |
1447 | break; | |
1448 | } | |
1449 | search_tbl->current_rate = rate_n_flags_from_tbl( | |
1450 | search_tbl, index, is_green); | |
1451 | lq_sta->search_better_tbl = 1; | |
b481de9c ZY |
1452 | goto out; |
1453 | } | |
1454 | tbl->action++; | |
1455 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1456 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1457 | ||
1458 | if (tbl->action == start_action) | |
1459 | break; | |
1460 | } | |
1461 | return 0; | |
1462 | ||
1463 | out: | |
1464 | tbl->action++; | |
1465 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1466 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1467 | return 0; | |
1468 | } | |
1469 | ||
77626355 BC |
1470 | /* |
1471 | * Try to switch to new modulation mode from MIMO | |
1472 | */ | |
c79dd5b5 | 1473 | static int rs_move_mimo_to_other(struct iwl_priv *priv, |
c33104f0 | 1474 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1475 | struct ieee80211_conf *conf, |
1476 | struct sta_info *sta, | |
b481de9c ZY |
1477 | int index) |
1478 | { | |
c33104f0 | 1479 | s8 is_green = lq_sta->is_green; |
bb8c093b | 1480 | struct iwl4965_scale_tbl_info *tbl = |
c33104f0 | 1481 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
bb8c093b | 1482 | struct iwl4965_scale_tbl_info *search_tbl = |
c33104f0 | 1483 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
bb8c093b CH |
1484 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - |
1485 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1486 | u8 start_action = tbl->action; |
aade00ce GC |
1487 | /*u8 valid_tx_ant = priv->hw_params.valid_tx_ant;*/ |
1488 | int ret; | |
b481de9c ZY |
1489 | |
1490 | for (;;) { | |
c33104f0 | 1491 | lq_sta->action_counter++; |
b481de9c ZY |
1492 | switch (tbl->action) { |
1493 | case IWL_MIMO_SWITCH_ANTENNA_A: | |
1494 | case IWL_MIMO_SWITCH_ANTENNA_B: | |
eecd6e57 | 1495 | IWL_DEBUG_RATE("LQ: MIMO2 switch to SISO\n"); |
0c11b4de | 1496 | |
77626355 | 1497 | /* Set up new search table for SISO */ |
b481de9c | 1498 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1499 | |
1500 | /*FIXME:RS:need to check ant validity + C*/ | |
b481de9c | 1501 | if (tbl->action == IWL_MIMO_SWITCH_ANTENNA_A) |
fde0db31 | 1502 | search_tbl->ant_type = ANT_A; |
b481de9c | 1503 | else |
fde0db31 | 1504 | search_tbl->ant_type = ANT_B; |
b481de9c | 1505 | |
c33104f0 | 1506 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1507 | search_tbl, index); |
dc2453ae | 1508 | if (!ret) { |
c33104f0 | 1509 | lq_sta->search_better_tbl = 1; |
b481de9c ZY |
1510 | goto out; |
1511 | } | |
1512 | break; | |
1513 | ||
1514 | case IWL_MIMO_SWITCH_GI: | |
eecd6e57 | 1515 | IWL_DEBUG_RATE("LQ: MIMO toggle SGI/NGI\n"); |
77626355 BC |
1516 | |
1517 | /* Set up new search table for MIMO */ | |
b481de9c | 1518 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1519 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1520 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
77626355 BC |
1521 | /* |
1522 | * If active table already uses the fastest possible | |
1523 | * modulation (dual stream with short guard interval), | |
1524 | * and it's working well, there's no need to look | |
1525 | * for a better type of modulation! | |
1526 | */ | |
39e88504 | 1527 | if (tbl->is_SGI) { |
c33104f0 | 1528 | s32 tpt = lq_sta->last_tpt / 100; |
39e88504 GC |
1529 | if (tpt >= search_tbl->expected_tpt[index]) |
1530 | break; | |
b481de9c | 1531 | } |
39e88504 GC |
1532 | search_tbl->current_rate = rate_n_flags_from_tbl( |
1533 | search_tbl, index, is_green); | |
1534 | lq_sta->search_better_tbl = 1; | |
b481de9c ZY |
1535 | goto out; |
1536 | ||
1537 | } | |
1538 | tbl->action++; | |
1539 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1540 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1541 | ||
1542 | if (tbl->action == start_action) | |
1543 | break; | |
1544 | } | |
1545 | ||
1546 | return 0; | |
1547 | out: | |
1548 | tbl->action++; | |
1549 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1550 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1551 | return 0; | |
1552 | ||
1553 | } | |
1554 | ||
77626355 BC |
1555 | /* |
1556 | * Check whether we should continue using same modulation mode, or | |
1557 | * begin search for a new mode, based on: | |
1558 | * 1) # tx successes or failures while using this mode | |
1559 | * 2) # times calling this function | |
1560 | * 3) elapsed time in this mode (not used, for now) | |
1561 | */ | |
c33104f0 | 1562 | static void rs_stay_in_table(struct iwl4965_lq_sta *lq_sta) |
b481de9c | 1563 | { |
bb8c093b | 1564 | struct iwl4965_scale_tbl_info *tbl; |
b481de9c ZY |
1565 | int i; |
1566 | int active_tbl; | |
1567 | int flush_interval_passed = 0; | |
1568 | ||
c33104f0 | 1569 | active_tbl = lq_sta->active_tbl; |
b481de9c | 1570 | |
c33104f0 | 1571 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 1572 | |
77626355 | 1573 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 1574 | if (lq_sta->stay_in_tbl) { |
b481de9c | 1575 | |
77626355 | 1576 | /* Elapsed time using current modulation mode */ |
c33104f0 | 1577 | if (lq_sta->flush_timer) |
b481de9c ZY |
1578 | flush_interval_passed = |
1579 | time_after(jiffies, | |
c33104f0 | 1580 | (unsigned long)(lq_sta->flush_timer + |
b481de9c ZY |
1581 | IWL_RATE_SCALE_FLUSH_INTVL)); |
1582 | ||
77626355 | 1583 | /* For now, disable the elapsed time criterion */ |
b481de9c | 1584 | flush_interval_passed = 0; |
77626355 BC |
1585 | |
1586 | /* | |
1587 | * Check if we should allow search for new modulation mode. | |
1588 | * If many frames have failed or succeeded, or we've used | |
1589 | * this same modulation for a long time, allow search, and | |
1590 | * reset history stats that keep track of whether we should | |
1591 | * allow a new search. Also (below) reset all bitmaps and | |
1592 | * stats in active history. | |
1593 | */ | |
c33104f0 TW |
1594 | if ((lq_sta->total_failed > lq_sta->max_failure_limit) || |
1595 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1596 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c | 1597 | && (flush_interval_passed))) { |
eecd6e57 | 1598 | IWL_DEBUG_RATE("LQ: stay is expired %d %d %d\n:", |
c33104f0 TW |
1599 | lq_sta->total_failed, |
1600 | lq_sta->total_success, | |
b481de9c | 1601 | flush_interval_passed); |
77626355 BC |
1602 | |
1603 | /* Allow search for new mode */ | |
c33104f0 TW |
1604 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
1605 | lq_sta->total_failed = 0; | |
1606 | lq_sta->total_success = 0; | |
1607 | lq_sta->flush_timer = 0; | |
77626355 BC |
1608 | |
1609 | /* | |
1610 | * Else if we've used this modulation mode enough repetitions | |
1611 | * (regardless of elapsed time or success/failure), reset | |
1612 | * history bitmaps and rate-specific stats for all rates in | |
1613 | * active table. | |
1614 | */ | |
403ab56b | 1615 | } else { |
c33104f0 TW |
1616 | lq_sta->table_count++; |
1617 | if (lq_sta->table_count >= | |
1618 | lq_sta->table_count_limit) { | |
1619 | lq_sta->table_count = 0; | |
b481de9c | 1620 | |
eecd6e57 | 1621 | IWL_DEBUG_RATE("LQ: stay in table clear win\n"); |
b481de9c ZY |
1622 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1623 | rs_rate_scale_clear_window( | |
1624 | &(tbl->win[i])); | |
1625 | } | |
1626 | } | |
1627 | ||
77626355 BC |
1628 | /* If transitioning to allow "search", reset all history |
1629 | * bitmaps and stats in active table (this will become the new | |
1630 | * "search" table). */ | |
c33104f0 | 1631 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
1632 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1633 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1634 | } | |
1635 | } | |
1636 | } | |
1637 | ||
77626355 BC |
1638 | /* |
1639 | * Do rate scaling and search for new modulation mode. | |
1640 | */ | |
c79dd5b5 | 1641 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c ZY |
1642 | struct net_device *dev, |
1643 | struct ieee80211_hdr *hdr, | |
1644 | struct sta_info *sta) | |
1645 | { | |
270243a5 RR |
1646 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
1647 | struct ieee80211_hw *hw = local_to_hw(local); | |
1648 | struct ieee80211_conf *conf = &hw->conf; | |
b481de9c ZY |
1649 | int low = IWL_RATE_INVALID; |
1650 | int high = IWL_RATE_INVALID; | |
1651 | int index; | |
1652 | int i; | |
bb8c093b | 1653 | struct iwl4965_rate_scale_data *window = NULL; |
b481de9c ZY |
1654 | int current_tpt = IWL_INVALID_VALUE; |
1655 | int low_tpt = IWL_INVALID_VALUE; | |
1656 | int high_tpt = IWL_INVALID_VALUE; | |
1657 | u32 fail_count; | |
1658 | s8 scale_action = 0; | |
1659 | u16 fc, rate_mask; | |
1660 | u8 update_lq = 0; | |
c33104f0 | 1661 | struct iwl4965_lq_sta *lq_sta; |
bb8c093b | 1662 | struct iwl4965_scale_tbl_info *tbl, *tbl1; |
b481de9c | 1663 | u16 rate_scale_index_msk = 0; |
39e88504 | 1664 | u32 rate; |
b481de9c ZY |
1665 | u8 is_green = 0; |
1666 | u8 active_tbl = 0; | |
1667 | u8 done_search = 0; | |
1668 | u16 high_low; | |
0c11b4de RR |
1669 | #ifdef CONFIG_IWL4965_HT |
1670 | u8 tid = MAX_TID_COUNT; | |
1671 | __le16 *qc; | |
1672 | #endif | |
b481de9c ZY |
1673 | |
1674 | IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); | |
1675 | ||
1676 | fc = le16_to_cpu(hdr->frame_control); | |
1677 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { | |
1678 | /* Send management frames and broadcast/multicast data using | |
1679 | * lowest rate. */ | |
1680 | /* TODO: this could probably be improved.. */ | |
1681 | return; | |
1682 | } | |
1683 | ||
1684 | if (!sta || !sta->rate_ctrl_priv) | |
1685 | return; | |
1686 | ||
1687 | if (!priv->lq_mngr.lq_ready) { | |
1688 | IWL_DEBUG_RATE("still rate scaling not ready\n"); | |
1689 | return; | |
1690 | } | |
c33104f0 | 1691 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
b481de9c | 1692 | |
0c11b4de RR |
1693 | #ifdef CONFIG_IWL4965_HT |
1694 | qc = ieee80211_get_qos_ctrl(hdr); | |
1695 | if (qc) { | |
1696 | tid = (u8)(le16_to_cpu(*qc) & 0xf); | |
1697 | rs_tl_add_packet(lq_sta, tid); | |
1698 | } | |
1699 | #endif | |
77626355 BC |
1700 | /* |
1701 | * Select rate-scale / modulation-mode table to work with in | |
1702 | * the rest of this function: "search" if searching for better | |
1703 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1704 | */ | |
c33104f0 TW |
1705 | if (!lq_sta->search_better_tbl) |
1706 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 1707 | else |
c33104f0 | 1708 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 1709 | |
c33104f0 TW |
1710 | tbl = &(lq_sta->lq_info[active_tbl]); |
1711 | is_green = lq_sta->is_green; | |
b481de9c | 1712 | |
77626355 | 1713 | /* current tx rate */ |
8318d78a | 1714 | index = sta->last_txrate_idx; |
b481de9c ZY |
1715 | |
1716 | IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index, | |
1717 | tbl->lq_type); | |
1718 | ||
77626355 | 1719 | /* rates available for this association, and for modulation mode */ |
eecd6e57 | 1720 | rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
b481de9c ZY |
1721 | |
1722 | IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask); | |
1723 | ||
1724 | /* mask with station rate restriction */ | |
1725 | if (is_legacy(tbl->lq_type)) { | |
8318d78a | 1726 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
77626355 | 1727 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 1728 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 1729 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
1730 | else |
1731 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 1732 | lq_sta->supp_rates); |
b481de9c ZY |
1733 | |
1734 | } else | |
1735 | rate_scale_index_msk = rate_mask; | |
1736 | ||
1737 | if (!rate_scale_index_msk) | |
1738 | rate_scale_index_msk = rate_mask; | |
1739 | ||
77626355 BC |
1740 | /* If current rate is no longer supported on current association, |
1741 | * or user changed preferences for rates, find a new supported rate. */ | |
b481de9c ZY |
1742 | if (index < 0 || !((1 << index) & rate_scale_index_msk)) { |
1743 | index = IWL_INVALID_VALUE; | |
1744 | update_lq = 1; | |
1745 | ||
77626355 | 1746 | /* get the highest available rate */ |
b481de9c ZY |
1747 | for (i = 0; i <= IWL_RATE_COUNT; i++) { |
1748 | if ((1 << i) & rate_scale_index_msk) | |
1749 | index = i; | |
1750 | } | |
1751 | ||
1752 | if (index == IWL_INVALID_VALUE) { | |
1753 | IWL_WARNING("Can not find a suitable rate\n"); | |
1754 | return; | |
1755 | } | |
1756 | } | |
1757 | ||
77626355 | 1758 | /* Get expected throughput table and history window for current rate */ |
b481de9c | 1759 | if (!tbl->expected_tpt) |
eecd6e57 | 1760 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c ZY |
1761 | |
1762 | window = &(tbl->win[index]); | |
1763 | ||
77626355 BC |
1764 | /* |
1765 | * If there is not enough history to calculate actual average | |
1766 | * throughput, keep analyzing results of more tx frames, without | |
1767 | * changing rate or mode (bypass most of the rest of this function). | |
1768 | * Set up new rate table in uCode only if old rate is not supported | |
1769 | * in current association (use new rate found above). | |
1770 | */ | |
b481de9c ZY |
1771 | fail_count = window->counter - window->success_counter; |
1772 | if (((fail_count < IWL_RATE_MIN_FAILURE_TH) && | |
1773 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) | |
1774 | || (tbl->expected_tpt == NULL)) { | |
1775 | IWL_DEBUG_RATE("LQ: still below TH succ %d total %d " | |
1776 | "for index %d\n", | |
1777 | window->success_counter, window->counter, index); | |
77626355 BC |
1778 | |
1779 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 1780 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
1781 | |
1782 | /* Should we stay with this modulation mode, | |
1783 | * or search for a new one? */ | |
c33104f0 | 1784 | rs_stay_in_table(lq_sta); |
77626355 BC |
1785 | |
1786 | /* Set up new rate table in uCode, if needed */ | |
b481de9c | 1787 | if (update_lq) { |
39e88504 GC |
1788 | rate = rate_n_flags_from_tbl(tbl, index, is_green); |
1789 | rs_fill_link_cmd(priv, lq_sta, rate, &lq_sta->lq); | |
66c73db7 | 1790 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c ZY |
1791 | } |
1792 | goto out; | |
1793 | ||
77626355 BC |
1794 | /* Else we have enough samples; calculate estimate of |
1795 | * actual average throughput */ | |
b481de9c ZY |
1796 | } else |
1797 | window->average_tpt = ((window->success_ratio * | |
1798 | tbl->expected_tpt[index] + 64) / 128); | |
1799 | ||
77626355 | 1800 | /* If we are searching for better modulation mode, check success. */ |
c33104f0 | 1801 | if (lq_sta->search_better_tbl) { |
b481de9c ZY |
1802 | int success_limit = IWL_RATE_SCALE_SWITCH; |
1803 | ||
77626355 BC |
1804 | /* If good success, continue using the "search" mode; |
1805 | * no need to send new link quality command, since we're | |
1806 | * continuing to use the setup that we've been trying. */ | |
b481de9c | 1807 | if ((window->success_ratio > success_limit) || |
c33104f0 | 1808 | (window->average_tpt > lq_sta->last_tpt)) { |
b481de9c | 1809 | if (!is_legacy(tbl->lq_type)) { |
eecd6e57 | 1810 | IWL_DEBUG_RATE("LQ: we are switching to HT" |
b481de9c ZY |
1811 | " rate suc %d current tpt %d" |
1812 | " old tpt %d\n", | |
1813 | window->success_ratio, | |
1814 | window->average_tpt, | |
c33104f0 TW |
1815 | lq_sta->last_tpt); |
1816 | lq_sta->enable_counter = 1; | |
b481de9c | 1817 | } |
77626355 | 1818 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 1819 | lq_sta->active_tbl = active_tbl; |
b481de9c | 1820 | current_tpt = window->average_tpt; |
77626355 BC |
1821 | |
1822 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 1823 | } else { |
77626355 | 1824 | /* Nullify "search" table */ |
b481de9c | 1825 | tbl->lq_type = LQ_NONE; |
77626355 BC |
1826 | |
1827 | /* Revert to "active" table */ | |
c33104f0 TW |
1828 | active_tbl = lq_sta->active_tbl; |
1829 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 1830 | |
77626355 | 1831 | /* Revert to "active" rate and throughput info */ |
17744ff6 | 1832 | index = iwl4965_hwrate_to_plcp_idx( |
39e88504 | 1833 | tbl->current_rate); |
c33104f0 | 1834 | current_tpt = lq_sta->last_tpt; |
b481de9c | 1835 | |
77626355 | 1836 | /* Need to set up a new rate table in uCode */ |
b481de9c | 1837 | update_lq = 1; |
eecd6e57 | 1838 | IWL_DEBUG_RATE("XXY GO BACK TO OLD TABLE\n"); |
b481de9c | 1839 | } |
77626355 BC |
1840 | |
1841 | /* Either way, we've made a decision; modulation mode | |
1842 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 1843 | lq_sta->search_better_tbl = 0; |
77626355 | 1844 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
1845 | goto lq_update; |
1846 | } | |
1847 | ||
77626355 BC |
1848 | /* (Else) not in search of better modulation mode, try for better |
1849 | * starting rate, while staying in this mode. */ | |
b481de9c ZY |
1850 | high_low = rs_get_adjacent_rate(index, rate_scale_index_msk, |
1851 | tbl->lq_type); | |
1852 | low = high_low & 0xff; | |
1853 | high = (high_low >> 8) & 0xff; | |
1854 | ||
77626355 | 1855 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 1856 | current_tpt = window->average_tpt; |
b481de9c ZY |
1857 | if (low != IWL_RATE_INVALID) |
1858 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
1859 | if (high != IWL_RATE_INVALID) |
1860 | high_tpt = tbl->win[high].average_tpt; | |
1861 | ||
77626355 | 1862 | /* Assume rate increase */ |
b481de9c ZY |
1863 | scale_action = 1; |
1864 | ||
77626355 | 1865 | /* Too many failures, decrease rate */ |
b481de9c ZY |
1866 | if ((window->success_ratio <= IWL_RATE_DECREASE_TH) || |
1867 | (current_tpt == 0)) { | |
1868 | IWL_DEBUG_RATE("decrease rate because of low success_ratio\n"); | |
1869 | scale_action = -1; | |
77626355 BC |
1870 | |
1871 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c ZY |
1872 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
1873 | (high_tpt == IWL_INVALID_VALUE)) | |
1874 | scale_action = 1; | |
77626355 BC |
1875 | |
1876 | /* Both adjacent throughputs are measured, but neither one has better | |
1877 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
1878 | else if ((low_tpt != IWL_INVALID_VALUE) && |
1879 | (high_tpt != IWL_INVALID_VALUE) && | |
1880 | (low_tpt < current_tpt) && | |
1881 | (high_tpt < current_tpt)) | |
1882 | scale_action = 0; | |
77626355 BC |
1883 | |
1884 | /* At least one adjacent rate's throughput is measured, | |
1885 | * and may have better performance. */ | |
b481de9c | 1886 | else { |
77626355 | 1887 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 1888 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 1889 | /* Higher rate has better throughput */ |
b481de9c ZY |
1890 | if (high_tpt > current_tpt) |
1891 | scale_action = 1; | |
1892 | else { | |
1893 | IWL_DEBUG_RATE | |
1894 | ("decrease rate because of high tpt\n"); | |
1895 | scale_action = -1; | |
1896 | } | |
77626355 BC |
1897 | |
1898 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 1899 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 1900 | /* Lower rate has better throughput */ |
b481de9c ZY |
1901 | if (low_tpt > current_tpt) { |
1902 | IWL_DEBUG_RATE | |
1903 | ("decrease rate because of low tpt\n"); | |
1904 | scale_action = -1; | |
1905 | } else | |
1906 | scale_action = 1; | |
1907 | } | |
1908 | } | |
1909 | ||
77626355 BC |
1910 | /* Sanity check; asked for decrease, but success rate or throughput |
1911 | * has been good at old rate. Don't change it. */ | |
b481de9c ZY |
1912 | if (scale_action == -1) { |
1913 | if ((low != IWL_RATE_INVALID) && | |
1914 | ((window->success_ratio > IWL_RATE_HIGH_TH) || | |
1915 | (current_tpt > (100 * tbl->expected_tpt[low])))) | |
1916 | scale_action = 0; | |
77626355 BC |
1917 | |
1918 | /* Sanity check; asked for increase, but success rate has not been great | |
1919 | * even at old rate, higher rate will be worse. Don't change it. */ | |
b481de9c ZY |
1920 | } else if ((scale_action == 1) && |
1921 | (window->success_ratio < IWL_RATE_INCREASE_TH)) | |
1922 | scale_action = 0; | |
1923 | ||
1924 | switch (scale_action) { | |
1925 | case -1: | |
77626355 | 1926 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
1927 | if (low != IWL_RATE_INVALID) { |
1928 | update_lq = 1; | |
1929 | index = low; | |
1930 | } | |
1931 | break; | |
1932 | case 1: | |
77626355 | 1933 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
1934 | if (high != IWL_RATE_INVALID) { |
1935 | update_lq = 1; | |
1936 | index = high; | |
1937 | } | |
1938 | ||
1939 | break; | |
1940 | case 0: | |
77626355 | 1941 | /* No change */ |
b481de9c ZY |
1942 | default: |
1943 | break; | |
1944 | } | |
1945 | ||
eecd6e57 | 1946 | IWL_DEBUG_RATE("choose rate scale index %d action %d low %d " |
b481de9c ZY |
1947 | "high %d type %d\n", |
1948 | index, scale_action, low, high, tbl->lq_type); | |
1949 | ||
1950 | lq_update: | |
77626355 | 1951 | /* Replace uCode's rate table for the destination station. */ |
b481de9c | 1952 | if (update_lq) { |
39e88504 GC |
1953 | rate = rate_n_flags_from_tbl(tbl, index, is_green); |
1954 | rs_fill_link_cmd(priv, lq_sta, rate, &lq_sta->lq); | |
66c73db7 | 1955 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1956 | } |
77626355 BC |
1957 | |
1958 | /* Should we stay with this modulation mode, or search for a new one? */ | |
c33104f0 | 1959 | rs_stay_in_table(lq_sta); |
b481de9c | 1960 | |
77626355 BC |
1961 | /* |
1962 | * Search for new modulation mode if we're: | |
1963 | * 1) Not changing rates right now | |
1964 | * 2) Not just finishing up a search | |
1965 | * 3) Allowing a new search | |
1966 | */ | |
c33104f0 | 1967 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl) { |
77626355 | 1968 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 1969 | lq_sta->last_tpt = current_tpt; |
b481de9c | 1970 | |
77626355 BC |
1971 | /* Select a new "search" modulation mode to try. |
1972 | * If one is found, set up the new "search" table. */ | |
b481de9c | 1973 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 1974 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1975 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 1976 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1977 | else |
c33104f0 | 1978 | rs_move_mimo_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1979 | |
77626355 | 1980 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 1981 | if (lq_sta->search_better_tbl) { |
77626355 | 1982 | /* Access the "search" table, clear its history. */ |
c33104f0 | 1983 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
1984 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1985 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1986 | ||
77626355 | 1987 | /* Use new "search" start rate */ |
17744ff6 | 1988 | index = iwl4965_hwrate_to_plcp_idx( |
39e88504 | 1989 | tbl->current_rate); |
b481de9c | 1990 | |
eecd6e57 | 1991 | IWL_DEBUG_RATE("Switch current mcs: %X index: %d\n", |
39e88504 GC |
1992 | tbl->current_rate, index); |
1993 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate, | |
c33104f0 | 1994 | &lq_sta->lq); |
66c73db7 | 1995 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1996 | } |
b481de9c | 1997 | |
77626355 BC |
1998 | /* If the "active" (non-search) mode was legacy, |
1999 | * and we've tried switching antennas, | |
2000 | * but we haven't been able to try HT modes (not available), | |
2001 | * stay with best antenna legacy modulation for a while | |
2002 | * before next round of mode comparisons. */ | |
c33104f0 | 2003 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 2004 | if (is_legacy(tbl1->lq_type) && |
c8b0e6e1 | 2005 | #ifdef CONFIG_IWL4965_HT |
270243a5 | 2006 | (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) && |
b481de9c | 2007 | #endif |
c33104f0 TW |
2008 | (lq_sta->action_counter >= 1)) { |
2009 | lq_sta->action_counter = 0; | |
eecd6e57 | 2010 | IWL_DEBUG_RATE("LQ: STAY in legacy table\n"); |
c33104f0 | 2011 | rs_set_stay_in_table(1, lq_sta); |
b481de9c ZY |
2012 | } |
2013 | ||
77626355 BC |
2014 | /* If we're in an HT mode, and all 3 mode switch actions |
2015 | * have been tried and compared, stay in this best modulation | |
2016 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 TW |
2017 | if (lq_sta->enable_counter && |
2018 | (lq_sta->action_counter >= IWL_ACTION_LIMIT)) { | |
0c11b4de RR |
2019 | #ifdef CONFIG_IWL4965_HT |
2020 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && | |
2021 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2022 | (tid != MAX_TID_COUNT)) { | |
eecd6e57 | 2023 | IWL_DEBUG_RATE("try to aggregate tid %d\n", tid); |
0c11b4de | 2024 | rs_tl_turn_on_agg(priv, tid, lq_sta, sta); |
b481de9c | 2025 | } |
0c11b4de | 2026 | #endif /*CONFIG_IWL4965_HT */ |
c33104f0 TW |
2027 | lq_sta->action_counter = 0; |
2028 | rs_set_stay_in_table(0, lq_sta); | |
b481de9c | 2029 | } |
77626355 BC |
2030 | |
2031 | /* | |
2032 | * Else, don't search for a new modulation mode. | |
2033 | * Put new timestamp in stay-in-modulation-mode flush timer if: | |
2034 | * 1) Not changing rates right now | |
2035 | * 2) Not just finishing up a search | |
2036 | * 3) flush timer is empty | |
2037 | */ | |
b481de9c | 2038 | } else { |
c33104f0 TW |
2039 | if ((!update_lq) && (!done_search) && (!lq_sta->flush_timer)) |
2040 | lq_sta->flush_timer = jiffies; | |
b481de9c ZY |
2041 | } |
2042 | ||
2043 | out: | |
39e88504 | 2044 | tbl->current_rate = rate_n_flags_from_tbl(tbl, index, is_green); |
b481de9c | 2045 | i = index; |
8318d78a | 2046 | sta->last_txrate_idx = i; |
b481de9c | 2047 | |
8318d78a | 2048 | /* sta->txrate_idx is an index to A mode rates which start |
b481de9c ZY |
2049 | * at IWL_FIRST_OFDM_RATE |
2050 | */ | |
8318d78a JB |
2051 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
2052 | sta->txrate_idx = i - IWL_FIRST_OFDM_RATE; | |
b481de9c | 2053 | else |
8318d78a | 2054 | sta->txrate_idx = i; |
b481de9c ZY |
2055 | |
2056 | return; | |
2057 | } | |
2058 | ||
2059 | ||
c79dd5b5 | 2060 | static void rs_initialize_lq(struct iwl_priv *priv, |
270243a5 | 2061 | struct ieee80211_conf *conf, |
b481de9c ZY |
2062 | struct sta_info *sta) |
2063 | { | |
c33104f0 | 2064 | struct iwl4965_lq_sta *lq_sta; |
bb8c093b | 2065 | struct iwl4965_scale_tbl_info *tbl; |
b481de9c | 2066 | int rate_idx; |
aade00ce | 2067 | int i; |
39e88504 | 2068 | u32 rate; |
aade00ce GC |
2069 | u8 use_green = rs_use_green(priv, conf); |
2070 | u8 active_tbl = 0; | |
2071 | u8 valid_tx_ant; | |
b481de9c ZY |
2072 | |
2073 | if (!sta || !sta->rate_ctrl_priv) | |
2074 | goto out; | |
2075 | ||
c33104f0 | 2076 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
8318d78a | 2077 | i = sta->last_txrate_idx; |
b481de9c | 2078 | |
c33104f0 | 2079 | if ((lq_sta->lq.sta_id == 0xff) && |
b481de9c ZY |
2080 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) |
2081 | goto out; | |
2082 | ||
aade00ce GC |
2083 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
2084 | ||
c33104f0 TW |
2085 | if (!lq_sta->search_better_tbl) |
2086 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2087 | else |
c33104f0 | 2088 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2089 | |
c33104f0 | 2090 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2091 | |
2092 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2093 | i = 0; | |
2094 | ||
fde0db31 | 2095 | /* FIXME:RS: This is also wrong in 4965 */ |
39e88504 GC |
2096 | rate = iwl4965_rates[i].plcp; |
2097 | rate |= RATE_MCS_ANT_B_MSK; | |
2098 | rate &= ~RATE_MCS_ANT_A_MSK; | |
b481de9c ZY |
2099 | |
2100 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
39e88504 | 2101 | rate |= RATE_MCS_CCK_MSK; |
b481de9c | 2102 | |
fde0db31 | 2103 | tbl->ant_type = ANT_B; |
39e88504 | 2104 | rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
aade00ce GC |
2105 | if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2106 | rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
b481de9c | 2107 | |
39e88504 GC |
2108 | rate = rate_n_flags_from_tbl(tbl, rate_idx, use_green); |
2109 | tbl->current_rate = rate; | |
eecd6e57 | 2110 | rs_set_expected_tpt_table(lq_sta, tbl); |
39e88504 | 2111 | rs_fill_link_cmd(NULL, lq_sta, rate, &lq_sta->lq); |
66c73db7 | 2112 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c ZY |
2113 | out: |
2114 | return; | |
2115 | } | |
2116 | ||
1abbe498 | 2117 | static void rs_get_rate(void *priv_rate, struct net_device *dev, |
8318d78a JB |
2118 | struct ieee80211_supported_band *sband, |
2119 | struct sk_buff *skb, | |
1abbe498 | 2120 | struct rate_selection *sel) |
b481de9c ZY |
2121 | { |
2122 | ||
2123 | int i; | |
2124 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
270243a5 | 2125 | struct ieee80211_conf *conf = &local->hw.conf; |
b481de9c ZY |
2126 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
2127 | struct sta_info *sta; | |
2bc454b0 | 2128 | u16 fc; |
c79dd5b5 | 2129 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
c33104f0 | 2130 | struct iwl4965_lq_sta *lq_sta; |
b481de9c | 2131 | |
58826351 | 2132 | IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n"); |
b481de9c | 2133 | |
d0709a65 JB |
2134 | rcu_read_lock(); |
2135 | ||
b481de9c ZY |
2136 | sta = sta_info_get(local, hdr->addr1); |
2137 | ||
2bc454b0 MW |
2138 | /* Send management frames and broadcast/multicast data using lowest |
2139 | * rate. */ | |
2140 | fc = le16_to_cpu(hdr->frame_control); | |
2141 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1) || | |
2142 | !sta || !sta->rate_ctrl_priv) { | |
8318d78a | 2143 | sel->rate = rate_lowest(local, sband, sta); |
f4d6082d | 2144 | goto out; |
b481de9c ZY |
2145 | } |
2146 | ||
c33104f0 | 2147 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
8318d78a | 2148 | i = sta->last_txrate_idx; |
b481de9c | 2149 | |
c33104f0 TW |
2150 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && |
2151 | !lq_sta->ibss_sta_added) { | |
947b13a7 | 2152 | u8 sta_id = iwl_find_station(priv, hdr->addr1); |
0795af57 | 2153 | DECLARE_MAC_BUF(mac); |
b481de9c ZY |
2154 | |
2155 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
2156 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
2157 | print_mac(mac, hdr->addr1)); | |
67d62035 RR |
2158 | sta_id = iwl4965_add_station_flags(priv, hdr->addr1, |
2159 | 0, CMD_ASYNC, NULL); | |
b481de9c ZY |
2160 | } |
2161 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2162 | lq_sta->lq.sta_id = sta_id; |
2163 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
2164 | lq_sta->ibss_sta_added = 1; | |
270243a5 | 2165 | rs_initialize_lq(priv, conf, sta); |
b481de9c | 2166 | } |
c33104f0 | 2167 | if (!lq_sta->ibss_sta_added) |
b481de9c ZY |
2168 | goto done; |
2169 | } | |
2170 | ||
f4d6082d | 2171 | done: |
1abbe498 | 2172 | if ((i < 0) || (i > IWL_RATE_COUNT)) { |
8318d78a | 2173 | sel->rate = rate_lowest(local, sband, sta); |
f4d6082d | 2174 | goto out; |
1abbe498 | 2175 | } |
b481de9c | 2176 | |
1abbe498 | 2177 | sel->rate = &priv->ieee_rates[i]; |
f4d6082d TW |
2178 | out: |
2179 | rcu_read_unlock(); | |
b481de9c ZY |
2180 | } |
2181 | ||
2182 | static void *rs_alloc_sta(void *priv, gfp_t gfp) | |
2183 | { | |
c33104f0 | 2184 | struct iwl4965_lq_sta *lq_sta; |
b481de9c ZY |
2185 | int i, j; |
2186 | ||
2187 | IWL_DEBUG_RATE("create station rate scale window\n"); | |
2188 | ||
c33104f0 | 2189 | lq_sta = kzalloc(sizeof(struct iwl4965_lq_sta), gfp); |
b481de9c | 2190 | |
c33104f0 | 2191 | if (lq_sta == NULL) |
b481de9c | 2192 | return NULL; |
c33104f0 | 2193 | lq_sta->lq.sta_id = 0xff; |
b481de9c | 2194 | |
63fddb9f | 2195 | |
b481de9c ZY |
2196 | for (j = 0; j < LQ_SIZE; j++) |
2197 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
c33104f0 | 2198 | rs_rate_scale_clear_window(&(lq_sta->lq_info[j].win[i])); |
b481de9c | 2199 | |
c33104f0 | 2200 | return lq_sta; |
b481de9c ZY |
2201 | } |
2202 | ||
2203 | static void rs_rate_init(void *priv_rate, void *priv_sta, | |
2204 | struct ieee80211_local *local, | |
2205 | struct sta_info *sta) | |
2206 | { | |
2207 | int i, j; | |
270243a5 | 2208 | struct ieee80211_conf *conf = &local->hw.conf; |
8318d78a | 2209 | struct ieee80211_supported_band *sband; |
c79dd5b5 | 2210 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
c33104f0 | 2211 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
b481de9c | 2212 | |
8318d78a JB |
2213 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
2214 | ||
c33104f0 | 2215 | lq_sta->flush_timer = 0; |
8318d78a JB |
2216 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
2217 | sta->txrate_idx = 3; | |
b481de9c ZY |
2218 | for (j = 0; j < LQ_SIZE; j++) |
2219 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
c33104f0 | 2220 | rs_rate_scale_clear_window(&(lq_sta->lq_info[j].win[i])); |
b481de9c ZY |
2221 | |
2222 | IWL_DEBUG_RATE("rate scale global init\n"); | |
2223 | /* TODO: what is a good starting rate for STA? About middle? Maybe not | |
2224 | * the lowest or the highest rate.. Could consider using RSSI from | |
2225 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2226 | * after assoc.. */ | |
2227 | ||
c33104f0 | 2228 | lq_sta->ibss_sta_added = 0; |
b481de9c | 2229 | if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { |
947b13a7 | 2230 | u8 sta_id = iwl_find_station(priv, sta->addr); |
0795af57 JP |
2231 | DECLARE_MAC_BUF(mac); |
2232 | ||
b481de9c | 2233 | /* for IBSS the call are from tasklet */ |
eecd6e57 | 2234 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
0795af57 | 2235 | print_mac(mac, sta->addr)); |
b481de9c ZY |
2236 | |
2237 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
2238 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
2239 | print_mac(mac, sta->addr)); | |
67d62035 RR |
2240 | sta_id = iwl4965_add_station_flags(priv, sta->addr, |
2241 | 0, CMD_ASYNC, NULL); | |
b481de9c ZY |
2242 | } |
2243 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2244 | lq_sta->lq.sta_id = sta_id; |
2245 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
b481de9c ZY |
2246 | } |
2247 | /* FIXME: this is w/a remove it later */ | |
2248 | priv->assoc_station_added = 1; | |
2249 | } | |
2250 | ||
77626355 | 2251 | /* Find highest tx rate supported by hardware and destination station */ |
8318d78a JB |
2252 | for (i = 0; i < sband->n_bitrates; i++) |
2253 | if (sta->supp_rates[sband->band] & BIT(i)) | |
2254 | sta->txrate_idx = i; | |
2255 | ||
2256 | sta->last_txrate_idx = sta->txrate_idx; | |
2257 | /* WTF is with this bogus comment? A doesn't have cck rates */ | |
77626355 | 2258 | /* For MODE_IEEE80211A, cck rates are at end of rate table */ |
8318d78a JB |
2259 | if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) |
2260 | sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; | |
b481de9c | 2261 | |
c33104f0 | 2262 | lq_sta->is_dup = 0; |
c33104f0 | 2263 | lq_sta->is_green = rs_use_green(priv, conf); |
39e88504 | 2264 | lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000); |
c33104f0 | 2265 | lq_sta->active_rate_basic = priv->active_rate_basic; |
8318d78a | 2266 | lq_sta->band = priv->band; |
c8b0e6e1 | 2267 | #ifdef CONFIG_IWL4965_HT |
77626355 BC |
2268 | /* |
2269 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2270 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2271 | */ | |
fde0db31 GC |
2272 | lq_sta->active_siso_rate = |
2273 | priv->current_ht_config.supp_mcs_set[0] << 1; | |
c33104f0 | 2274 | lq_sta->active_siso_rate |= |
fde0db31 | 2275 | priv->current_ht_config.supp_mcs_set[0] & 0x1; |
c33104f0 | 2276 | lq_sta->active_siso_rate &= ~((u16)0x2); |
fde0db31 | 2277 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; |
b481de9c | 2278 | |
77626355 | 2279 | /* Same here */ |
fde0db31 GC |
2280 | lq_sta->active_mimo2_rate = |
2281 | priv->current_ht_config.supp_mcs_set[1] << 1; | |
2282 | lq_sta->active_mimo2_rate |= | |
2283 | priv->current_ht_config.supp_mcs_set[1] & 0x1; | |
2284 | lq_sta->active_mimo2_rate &= ~((u16)0x2); | |
2285 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2286 | ||
2287 | lq_sta->active_mimo3_rate = | |
2288 | priv->current_ht_config.supp_mcs_set[2] << 1; | |
2289 | lq_sta->active_mimo3_rate |= | |
2290 | priv->current_ht_config.supp_mcs_set[2] & 0x1; | |
2291 | lq_sta->active_mimo3_rate &= ~((u16)0x2); | |
2292 | lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; | |
2293 | ||
eecd6e57 | 2294 | IWL_DEBUG_RATE("SISO RATE %X MIMO2 RATE %X MIMO3 RATE %X\n", |
c33104f0 | 2295 | lq_sta->active_siso_rate, |
fde0db31 GC |
2296 | lq_sta->active_mimo2_rate, |
2297 | lq_sta->active_mimo3_rate); | |
2298 | ||
0c11b4de RR |
2299 | /* as default allow aggregation for all tids */ |
2300 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
c8b0e6e1 | 2301 | #endif /*CONFIG_IWL4965_HT*/ |
98d7e09a | 2302 | #ifdef CONFIG_MAC80211_DEBUGFS |
c33104f0 | 2303 | lq_sta->drv = priv; |
98d7e09a | 2304 | #endif |
b481de9c ZY |
2305 | |
2306 | if (priv->assoc_station_added) | |
2307 | priv->lq_mngr.lq_ready = 1; | |
2308 | ||
270243a5 | 2309 | rs_initialize_lq(priv, conf, sta); |
b481de9c ZY |
2310 | } |
2311 | ||
fde0db31 GC |
2312 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
2313 | struct iwl4965_lq_sta *lq_sta, | |
39e88504 | 2314 | u32 new_rate, |
fde0db31 | 2315 | struct iwl_link_quality_cmd *lq_cmd) |
b481de9c | 2316 | { |
aade00ce | 2317 | struct iwl4965_scale_tbl_info tbl_type; |
b481de9c | 2318 | int index = 0; |
b481de9c | 2319 | int rate_idx; |
1b696de2 | 2320 | int repeat_rate = 0; |
aade00ce | 2321 | u8 ant_toggle_cnt = 0; |
b481de9c | 2322 | u8 use_ht_possible = 1; |
aade00ce | 2323 | u8 valid_tx_ant = 0; |
b481de9c | 2324 | |
77626355 | 2325 | /* Override starting rate (index 0) if needed for debug purposes */ |
39e88504 | 2326 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
98d7e09a | 2327 | |
39e88504 | 2328 | /* Interpret new_rate (rate_n_flags) */ |
aade00ce | 2329 | memset(&tbl_type, 0, sizeof(tbl_type)); |
39e88504 | 2330 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
b481de9c ZY |
2331 | &tbl_type, &rate_idx); |
2332 | ||
77626355 | 2333 | /* How many times should we repeat the initial rate? */ |
b481de9c | 2334 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce | 2335 | ant_toggle_cnt = 1; |
1b696de2 | 2336 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2337 | } else { |
1b696de2 | 2338 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2339 | } |
b481de9c ZY |
2340 | |
2341 | lq_cmd->general_params.mimo_delimiter = | |
2342 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2343 | |
2344 | /* Fill 1st table entry (index 0) */ | |
39e88504 | 2345 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c | 2346 | |
fde0db31 GC |
2347 | /*FIXME:RS*/ |
2348 | if (is_mimo(tbl_type.lq_type) || (tbl_type.ant_type == ANT_A)) | |
77626355 BC |
2349 | lq_cmd->general_params.single_stream_ant_msk |
2350 | = LINK_QUAL_ANT_A_MSK; | |
b481de9c | 2351 | else |
77626355 BC |
2352 | lq_cmd->general_params.single_stream_ant_msk |
2353 | = LINK_QUAL_ANT_B_MSK; | |
b481de9c ZY |
2354 | |
2355 | index++; | |
1b696de2 | 2356 | repeat_rate--; |
b481de9c | 2357 | |
aade00ce GC |
2358 | if (priv) |
2359 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2360 | ||
77626355 | 2361 | /* Fill rest of rate table */ |
b481de9c | 2362 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2363 | /* Repeat initial/next rate. |
2364 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2365 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2366 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c | 2367 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2368 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2369 | ant_toggle_cnt++; | |
2370 | else if (priv && | |
2371 | rs_toggle_antenna(valid_tx_ant, | |
2372 | &new_rate, &tbl_type)) | |
2373 | ant_toggle_cnt = 1; | |
2374 | } | |
98d7e09a | 2375 | |
77626355 | 2376 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2377 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2378 | |
2379 | /* Fill next table entry */ | |
b481de9c | 2380 | lq_cmd->rs_table[index].rate_n_flags = |
39e88504 | 2381 | cpu_to_le32(new_rate); |
1b696de2 | 2382 | repeat_rate--; |
b481de9c ZY |
2383 | index++; |
2384 | } | |
2385 | ||
39e88504 | 2386 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
2387 | &rate_idx); |
2388 | ||
77626355 BC |
2389 | /* Indicate to uCode which entries might be MIMO. |
2390 | * If initial rate was MIMO, this will finally end up | |
2391 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
2392 | if (is_mimo(tbl_type.lq_type)) |
2393 | lq_cmd->general_params.mimo_delimiter = index; | |
2394 | ||
77626355 | 2395 | /* Get next rate */ |
39e88504 GC |
2396 | new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
2397 | use_ht_possible); | |
b481de9c | 2398 | |
77626355 | 2399 | /* How many times should we repeat the next rate? */ |
b481de9c | 2400 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2401 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2402 | ant_toggle_cnt++; | |
2403 | else if (priv && | |
2404 | rs_toggle_antenna(valid_tx_ant, | |
2405 | &new_rate, &tbl_type)) | |
2406 | ant_toggle_cnt = 1; | |
2407 | ||
1b696de2 | 2408 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2409 | } else { |
1b696de2 | 2410 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2411 | } |
b481de9c | 2412 | |
77626355 BC |
2413 | /* Don't allow HT rates after next pass. |
2414 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
2415 | use_ht_possible = 0; |
2416 | ||
77626355 | 2417 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2418 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2419 | |
2420 | /* Fill next table entry */ | |
39e88504 | 2421 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c ZY |
2422 | |
2423 | index++; | |
1b696de2 | 2424 | repeat_rate--; |
b481de9c ZY |
2425 | } |
2426 | ||
b481de9c ZY |
2427 | lq_cmd->general_params.dual_stream_ant_msk = 3; |
2428 | lq_cmd->agg_params.agg_dis_start_th = 3; | |
2429 | lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); | |
b481de9c ZY |
2430 | } |
2431 | ||
2432 | static void *rs_alloc(struct ieee80211_local *local) | |
2433 | { | |
2434 | return local->hw.priv; | |
2435 | } | |
2436 | /* rate scale requires free function to be implemented */ | |
2437 | static void rs_free(void *priv_rate) | |
2438 | { | |
2439 | return; | |
2440 | } | |
2441 | ||
2442 | static void rs_clear(void *priv_rate) | |
2443 | { | |
c79dd5b5 | 2444 | struct iwl_priv *priv = (struct iwl_priv *) priv_rate; |
b481de9c ZY |
2445 | |
2446 | IWL_DEBUG_RATE("enter\n"); | |
2447 | ||
2448 | priv->lq_mngr.lq_ready = 0; | |
b481de9c ZY |
2449 | |
2450 | IWL_DEBUG_RATE("leave\n"); | |
2451 | } | |
2452 | ||
2453 | static void rs_free_sta(void *priv, void *priv_sta) | |
2454 | { | |
c33104f0 | 2455 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
b481de9c ZY |
2456 | |
2457 | IWL_DEBUG_RATE("enter\n"); | |
c33104f0 | 2458 | kfree(lq_sta); |
b481de9c ZY |
2459 | IWL_DEBUG_RATE("leave\n"); |
2460 | } | |
2461 | ||
2462 | ||
93dc646a | 2463 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2464 | static int open_file_generic(struct inode *inode, struct file *file) |
2465 | { | |
2466 | file->private_data = inode->i_private; | |
2467 | return 0; | |
2468 | } | |
c33104f0 | 2469 | static void rs_dbgfs_set_mcs(struct iwl4965_lq_sta *lq_sta, |
39e88504 | 2470 | u32 *rate_n_flags, int index) |
98d7e09a | 2471 | { |
39e88504 GC |
2472 | if (lq_sta->dbg_fixed_rate) { |
2473 | if (index < 12) { | |
2474 | *rate_n_flags = lq_sta->dbg_fixed_rate; | |
2475 | } else { | |
2476 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
2477 | *rate_n_flags = 0x800D; | |
2478 | else | |
2479 | *rate_n_flags = 0x820A; | |
2480 | } | |
98d7e09a | 2481 | IWL_DEBUG_RATE("Fixed rate ON\n"); |
39e88504 GC |
2482 | } else { |
2483 | IWL_DEBUG_RATE("Fixed rate OFF\n"); | |
98d7e09a | 2484 | } |
98d7e09a | 2485 | } |
5ae212c9 | 2486 | |
98d7e09a ZY |
2487 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2488 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2489 | { | |
c33104f0 | 2490 | struct iwl4965_lq_sta *lq_sta = file->private_data; |
98d7e09a ZY |
2491 | char buf[64]; |
2492 | int buf_size; | |
2493 | u32 parsed_rate; | |
2494 | ||
2495 | memset(buf, 0, sizeof(buf)); | |
2496 | buf_size = min(count, sizeof(buf) - 1); | |
2497 | if (copy_from_user(buf, user_buf, buf_size)) | |
2498 | return -EFAULT; | |
2499 | ||
2500 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
39e88504 | 2501 | lq_sta->dbg_fixed_rate = parsed_rate; |
98d7e09a | 2502 | else |
39e88504 | 2503 | lq_sta->dbg_fixed_rate = 0; |
98d7e09a | 2504 | |
39e88504 GC |
2505 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ |
2506 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2507 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2508 | lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
98d7e09a ZY |
2509 | |
2510 | IWL_DEBUG_RATE("sta_id %d rate 0x%X\n", | |
39e88504 | 2511 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
98d7e09a | 2512 | |
39e88504 GC |
2513 | if (lq_sta->dbg_fixed_rate) { |
2514 | rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate, | |
2515 | &lq_sta->lq); | |
66c73db7 | 2516 | iwl_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC); |
98d7e09a ZY |
2517 | } |
2518 | ||
2519 | return count; | |
2520 | } | |
0209dc11 | 2521 | |
5ae212c9 ZY |
2522 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2523 | char __user *user_buf, size_t count, loff_t *ppos) | |
2524 | { | |
2525 | char buff[1024]; | |
2526 | int desc = 0; | |
2527 | int i = 0; | |
2528 | ||
c33104f0 | 2529 | struct iwl4965_lq_sta *lq_sta = file->private_data; |
5ae212c9 | 2530 | |
c33104f0 | 2531 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 2532 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 | 2533 | lq_sta->total_failed, lq_sta->total_success, |
39e88504 | 2534 | lq_sta->active_legacy_rate); |
98d7e09a | 2535 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
39e88504 | 2536 | lq_sta->dbg_fixed_rate); |
5ae212c9 ZY |
2537 | desc += sprintf(buff+desc, "general:" |
2538 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
2539 | lq_sta->lq.general_params.flags, |
2540 | lq_sta->lq.general_params.mimo_delimiter, | |
2541 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2542 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
2543 | |
2544 | desc += sprintf(buff+desc, "agg:" | |
2545 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
2546 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
2547 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2548 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
2549 | |
2550 | desc += sprintf(buff+desc, | |
2551 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
2552 | lq_sta->lq.general_params.start_rate_index[0], |
2553 | lq_sta->lq.general_params.start_rate_index[1], | |
2554 | lq_sta->lq.general_params.start_rate_index[2], | |
2555 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 ZY |
2556 | |
2557 | ||
2558 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
2559 | desc += sprintf(buff+desc, " rate[%d] 0x%X\n", | |
c33104f0 | 2560 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); |
5ae212c9 ZY |
2561 | |
2562 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2563 | } | |
2564 | ||
2565 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2566 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2567 | .read = rs_sta_dbgfs_scale_table_read, |
2568 | .open = open_file_generic, | |
2569 | }; | |
0209dc11 ZY |
2570 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2571 | char __user *user_buf, size_t count, loff_t *ppos) | |
2572 | { | |
2573 | char buff[1024]; | |
2574 | int desc = 0; | |
2575 | int i, j; | |
2576 | ||
c33104f0 | 2577 | struct iwl4965_lq_sta *lq_sta = file->private_data; |
0209dc11 ZY |
2578 | for (i = 0; i < LQ_SIZE; i++) { |
2579 | desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" | |
2580 | "rate=0x%X\n", | |
c33104f0 TW |
2581 | lq_sta->active_tbl == i?"*":"x", |
2582 | lq_sta->lq_info[i].lq_type, | |
2583 | lq_sta->lq_info[i].is_SGI, | |
2584 | lq_sta->lq_info[i].is_fat, | |
2585 | lq_sta->lq_info[i].is_dup, | |
39e88504 | 2586 | lq_sta->lq_info[i].current_rate); |
0209dc11 ZY |
2587 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
2588 | desc += sprintf(buff+desc, | |
c33104f0 TW |
2589 | "counter=%d success=%d %%=%d\n", |
2590 | lq_sta->lq_info[i].win[j].counter, | |
2591 | lq_sta->lq_info[i].win[j].success_counter, | |
2592 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
2593 | } |
2594 | } | |
2595 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2596 | } | |
2597 | ||
2598 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2599 | .read = rs_sta_dbgfs_stats_table_read, | |
2600 | .open = open_file_generic, | |
2601 | }; | |
5ae212c9 | 2602 | |
93dc646a ZY |
2603 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2604 | struct dentry *dir) | |
2605 | { | |
c33104f0 TW |
2606 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
2607 | lq_sta->rs_sta_dbgfs_scale_table_file = | |
0209dc11 | 2608 | debugfs_create_file("rate_scale_table", 0600, dir, |
c33104f0 TW |
2609 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
2610 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
0209dc11 | 2611 | debugfs_create_file("rate_stats_table", 0600, dir, |
c33104f0 | 2612 | lq_sta, &rs_sta_dbgfs_stats_table_ops); |
0c11b4de RR |
2613 | #ifdef CONFIG_IWL4965_HT |
2614 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = | |
2615 | debugfs_create_u8("tx_agg_tid_enable", 0600, dir, | |
2616 | &lq_sta->tx_agg_tid_en); | |
2617 | #endif | |
2618 | ||
93dc646a ZY |
2619 | } |
2620 | ||
2621 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2622 | { | |
c33104f0 TW |
2623 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
2624 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); | |
2625 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
0c11b4de RR |
2626 | #ifdef CONFIG_IWL4965_HT |
2627 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); | |
2628 | #endif | |
93dc646a ZY |
2629 | } |
2630 | #endif | |
2631 | ||
b481de9c ZY |
2632 | static struct rate_control_ops rs_ops = { |
2633 | .module = NULL, | |
2634 | .name = RS_NAME, | |
2635 | .tx_status = rs_tx_status, | |
2636 | .get_rate = rs_get_rate, | |
2637 | .rate_init = rs_rate_init, | |
2638 | .clear = rs_clear, | |
2639 | .alloc = rs_alloc, | |
2640 | .free = rs_free, | |
2641 | .alloc_sta = rs_alloc_sta, | |
2642 | .free_sta = rs_free_sta, | |
93dc646a ZY |
2643 | #ifdef CONFIG_MAC80211_DEBUGFS |
2644 | .add_sta_debugfs = rs_add_debugfs, | |
2645 | .remove_sta_debugfs = rs_remove_debugfs, | |
2646 | #endif | |
b481de9c ZY |
2647 | }; |
2648 | ||
bb8c093b | 2649 | int iwl4965_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id) |
b481de9c ZY |
2650 | { |
2651 | struct ieee80211_local *local = hw_to_local(hw); | |
c79dd5b5 | 2652 | struct iwl_priv *priv = hw->priv; |
c33104f0 | 2653 | struct iwl4965_lq_sta *lq_sta; |
b481de9c | 2654 | struct sta_info *sta; |
c33104f0 | 2655 | int cnt = 0, i; |
b481de9c ZY |
2656 | u32 samples = 0, success = 0, good = 0; |
2657 | unsigned long now = jiffies; | |
2658 | u32 max_time = 0; | |
2659 | u8 lq_type, antenna; | |
2660 | ||
d0709a65 JB |
2661 | rcu_read_lock(); |
2662 | ||
b481de9c ZY |
2663 | sta = sta_info_get(local, priv->stations[sta_id].sta.sta.addr); |
2664 | if (!sta || !sta->rate_ctrl_priv) { | |
d0709a65 | 2665 | if (sta) |
b481de9c | 2666 | IWL_DEBUG_RATE("leave - no private rate data!\n"); |
d0709a65 | 2667 | else |
b481de9c | 2668 | IWL_DEBUG_RATE("leave - no station!\n"); |
d0709a65 | 2669 | rcu_read_unlock(); |
b481de9c ZY |
2670 | return sprintf(buf, "station %d not found\n", sta_id); |
2671 | } | |
2672 | ||
c33104f0 | 2673 | lq_sta = (void *)sta->rate_ctrl_priv; |
b481de9c | 2674 | |
c33104f0 | 2675 | lq_type = lq_sta->lq_info[lq_sta->active_tbl].lq_type; |
fde0db31 | 2676 | antenna = lq_sta->lq_info[lq_sta->active_tbl].ant_type; |
b481de9c ZY |
2677 | |
2678 | if (is_legacy(lq_type)) | |
2679 | i = IWL_RATE_54M_INDEX; | |
2680 | else | |
2681 | i = IWL_RATE_60M_INDEX; | |
2682 | while (1) { | |
2683 | u64 mask; | |
2684 | int j; | |
c33104f0 | 2685 | int active = lq_sta->active_tbl; |
b481de9c | 2686 | |
c33104f0 TW |
2687 | cnt += |
2688 | sprintf(&buf[cnt], " %2dMbs: ", iwl4965_rates[i].ieee / 2); | |
b481de9c ZY |
2689 | |
2690 | mask = (1ULL << (IWL_RATE_MAX_WINDOW - 1)); | |
2691 | for (j = 0; j < IWL_RATE_MAX_WINDOW; j++, mask >>= 1) | |
c33104f0 TW |
2692 | buf[cnt++] = |
2693 | (lq_sta->lq_info[active].win[i].data & mask) | |
b481de9c ZY |
2694 | ? '1' : '0'; |
2695 | ||
c33104f0 TW |
2696 | samples += lq_sta->lq_info[active].win[i].counter; |
2697 | good += lq_sta->lq_info[active].win[i].success_counter; | |
2698 | success += lq_sta->lq_info[active].win[i].success_counter * | |
bb8c093b | 2699 | iwl4965_rates[i].ieee; |
b481de9c | 2700 | |
c33104f0 | 2701 | if (lq_sta->lq_info[active].win[i].stamp) { |
b481de9c ZY |
2702 | int delta = |
2703 | jiffies_to_msecs(now - | |
c33104f0 | 2704 | lq_sta->lq_info[active].win[i].stamp); |
b481de9c ZY |
2705 | |
2706 | if (delta > max_time) | |
2707 | max_time = delta; | |
2708 | ||
c33104f0 | 2709 | cnt += sprintf(&buf[cnt], "%5dms\n", delta); |
b481de9c | 2710 | } else |
c33104f0 | 2711 | buf[cnt++] = '\n'; |
b481de9c | 2712 | |
bb8c093b | 2713 | j = iwl4965_get_prev_ieee_rate(i); |
b481de9c ZY |
2714 | if (j == i) |
2715 | break; | |
2716 | i = j; | |
2717 | } | |
2718 | ||
2719 | /* Display the average rate of all samples taken. | |
2720 | * | |
77626355 | 2721 | * NOTE: We multiply # of samples by 2 since the IEEE measurement |
bb8c093b | 2722 | * added from iwl4965_rates is actually 2X the rate */ |
b481de9c | 2723 | if (samples) |
c33104f0 | 2724 | cnt += sprintf(&buf[cnt], |
b481de9c ZY |
2725 | "\nAverage rate is %3d.%02dMbs over last %4dms\n" |
2726 | "%3d%% success (%d good packets over %d tries)\n", | |
2727 | success / (2 * samples), (success * 5 / samples) % 10, | |
2728 | max_time, good * 100 / samples, good, samples); | |
2729 | else | |
c33104f0 TW |
2730 | cnt += sprintf(&buf[cnt], "\nAverage rate: 0Mbs\n"); |
2731 | ||
2732 | cnt += sprintf(&buf[cnt], "\nrate scale type %d antenna %d " | |
b481de9c | 2733 | "active_search %d rate index %d\n", lq_type, antenna, |
8318d78a | 2734 | lq_sta->search_better_tbl, sta->last_txrate_idx); |
b481de9c | 2735 | |
d0709a65 | 2736 | rcu_read_unlock(); |
c33104f0 | 2737 | return cnt; |
b481de9c ZY |
2738 | } |
2739 | ||
bb8c093b | 2740 | void iwl4965_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id) |
b481de9c | 2741 | { |
c79dd5b5 | 2742 | struct iwl_priv *priv = hw->priv; |
b481de9c ZY |
2743 | |
2744 | priv->lq_mngr.lq_ready = 1; | |
2745 | } | |
2746 | ||
897e1cf2 | 2747 | int iwl4965_rate_control_register(void) |
b481de9c | 2748 | { |
897e1cf2 | 2749 | return ieee80211_rate_control_register(&rs_ops); |
b481de9c ZY |
2750 | } |
2751 | ||
897e1cf2 | 2752 | void iwl4965_rate_control_unregister(void) |
b481de9c ZY |
2753 | { |
2754 | ieee80211_rate_control_unregister(&rs_ops); | |
2755 | } | |
2756 |