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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 | |
3e0d4cb1 | 40 | #include "iwl-dev.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; |
5ae212c9 | 171 | #endif |
6243065d | 172 | struct iwl_priv *drv; |
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, | |
07bc28ed | 181 | u32 rate_n_flags); |
b481de9c ZY |
182 | |
183 | ||
98d7e09a | 184 | #ifdef CONFIG_MAC80211_DEBUGFS |
c33104f0 | 185 | static void rs_dbgfs_set_mcs(struct iwl4965_lq_sta *lq_sta, |
39e88504 | 186 | u32 *rate_n_flags, int index); |
98d7e09a | 187 | #else |
c33104f0 | 188 | static void rs_dbgfs_set_mcs(struct iwl4965_lq_sta *lq_sta, |
39e88504 | 189 | u32 *rate_n_flags, int index) |
98d7e09a ZY |
190 | {} |
191 | #endif | |
77626355 BC |
192 | |
193 | /* | |
194 | * Expected throughput metrics for following rates: | |
195 | * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits | |
196 | * "G" is the only table that supports CCK (the first 4 rates). | |
197 | */ | |
fde0db31 | 198 | /*FIXME:RS:need to spearate tables for MIMO2/MIMO3*/ |
b481de9c ZY |
199 | static s32 expected_tpt_A[IWL_RATE_COUNT] = { |
200 | 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
201 | }; | |
202 | ||
203 | static s32 expected_tpt_G[IWL_RATE_COUNT] = { | |
204 | 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186 | |
205 | }; | |
206 | ||
207 | static s32 expected_tpt_siso20MHz[IWL_RATE_COUNT] = { | |
208 | 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202 | |
209 | }; | |
210 | ||
211 | static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { | |
212 | 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 | |
213 | }; | |
214 | ||
215 | static s32 expected_tpt_mimo20MHz[IWL_RATE_COUNT] = { | |
216 | 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 | |
217 | }; | |
218 | ||
219 | static s32 expected_tpt_mimo20MHzSGI[IWL_RATE_COUNT] = { | |
220 | 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 | |
221 | }; | |
222 | ||
223 | static s32 expected_tpt_siso40MHz[IWL_RATE_COUNT] = { | |
224 | 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257 | |
225 | }; | |
226 | ||
227 | static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { | |
228 | 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 | |
229 | }; | |
230 | ||
231 | static s32 expected_tpt_mimo40MHz[IWL_RATE_COUNT] = { | |
232 | 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 | |
233 | }; | |
234 | ||
235 | static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = { | |
236 | 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 | |
237 | }; | |
238 | ||
39e88504 | 239 | static inline u8 rs_extract_rate(u32 rate_n_flags) |
b481de9c ZY |
240 | { |
241 | return (u8)(rate_n_flags & 0xFF); | |
242 | } | |
243 | ||
bb8c093b | 244 | static void rs_rate_scale_clear_window(struct iwl4965_rate_scale_data *window) |
b481de9c ZY |
245 | { |
246 | window->data = 0; | |
247 | window->success_counter = 0; | |
248 | window->success_ratio = IWL_INVALID_VALUE; | |
249 | window->counter = 0; | |
250 | window->average_tpt = IWL_INVALID_VALUE; | |
251 | window->stamp = 0; | |
b481de9c ZY |
252 | } |
253 | ||
aade00ce GC |
254 | static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
255 | { | |
256 | return ((ant_type & valid_antenna) == ant_type); | |
257 | } | |
258 | ||
0c11b4de RR |
259 | #ifdef CONFIG_IWL4965_HT |
260 | /* | |
261 | * removes the old data from the statistics. All data that is older than | |
262 | * TID_MAX_TIME_DIFF, will be deleted. | |
263 | */ | |
264 | static void rs_tl_rm_old_stats(struct iwl4965_traffic_load *tl, u32 curr_time) | |
265 | { | |
266 | /* The oldest age we want to keep */ | |
267 | u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; | |
268 | ||
269 | while (tl->queue_count && | |
270 | (tl->time_stamp < oldest_time)) { | |
271 | tl->total -= tl->packet_count[tl->head]; | |
272 | tl->packet_count[tl->head] = 0; | |
273 | tl->time_stamp += TID_QUEUE_CELL_SPACING; | |
274 | tl->queue_count--; | |
275 | tl->head++; | |
276 | if (tl->head >= TID_QUEUE_MAX_SIZE) | |
277 | tl->head = 0; | |
278 | } | |
279 | } | |
280 | ||
281 | /* | |
282 | * increment traffic load value for tid and also remove | |
283 | * any old values if passed the certain time period | |
284 | */ | |
285 | static void rs_tl_add_packet(struct iwl4965_lq_sta *lq_data, u8 tid) | |
286 | { | |
287 | u32 curr_time = jiffies_to_msecs(jiffies); | |
288 | u32 time_diff; | |
289 | s32 index; | |
290 | struct iwl4965_traffic_load *tl = NULL; | |
291 | ||
292 | if (tid >= TID_MAX_LOAD_COUNT) | |
293 | return; | |
294 | ||
295 | tl = &lq_data->load[tid]; | |
296 | ||
297 | curr_time -= curr_time % TID_ROUND_VALUE; | |
298 | ||
299 | /* Happens only for the first packet. Initialize the data */ | |
300 | if (!(tl->queue_count)) { | |
301 | tl->total = 1; | |
302 | tl->time_stamp = curr_time; | |
303 | tl->queue_count = 1; | |
304 | tl->head = 0; | |
305 | tl->packet_count[0] = 1; | |
306 | return; | |
307 | } | |
308 | ||
309 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
310 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
311 | ||
312 | /* The history is too long: remove data that is older than */ | |
313 | /* TID_MAX_TIME_DIFF */ | |
314 | if (index >= TID_QUEUE_MAX_SIZE) | |
315 | rs_tl_rm_old_stats(tl, curr_time); | |
316 | ||
317 | index = (tl->head + index) % TID_QUEUE_MAX_SIZE; | |
318 | tl->packet_count[index] = tl->packet_count[index] + 1; | |
319 | tl->total = tl->total + 1; | |
320 | ||
321 | if ((index + 1) > tl->queue_count) | |
322 | tl->queue_count = index + 1; | |
323 | } | |
324 | ||
325 | /* | |
326 | get the traffic load value for tid | |
327 | */ | |
328 | static u32 rs_tl_get_load(struct iwl4965_lq_sta *lq_data, u8 tid) | |
329 | { | |
330 | u32 curr_time = jiffies_to_msecs(jiffies); | |
331 | u32 time_diff; | |
332 | s32 index; | |
333 | struct iwl4965_traffic_load *tl = NULL; | |
334 | ||
335 | if (tid >= TID_MAX_LOAD_COUNT) | |
336 | return 0; | |
337 | ||
338 | tl = &(lq_data->load[tid]); | |
339 | ||
340 | curr_time -= curr_time % TID_ROUND_VALUE; | |
341 | ||
342 | if (!(tl->queue_count)) | |
343 | return 0; | |
344 | ||
345 | time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); | |
346 | index = time_diff / TID_QUEUE_CELL_SPACING; | |
347 | ||
348 | /* The history is too long: remove data that is older than */ | |
349 | /* TID_MAX_TIME_DIFF */ | |
350 | if (index >= TID_QUEUE_MAX_SIZE) | |
351 | rs_tl_rm_old_stats(tl, curr_time); | |
352 | ||
353 | return tl->total; | |
354 | } | |
355 | ||
c79dd5b5 | 356 | static void rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv, |
0c11b4de RR |
357 | struct iwl4965_lq_sta *lq_data, u8 tid, |
358 | struct sta_info *sta) | |
359 | { | |
360 | unsigned long state; | |
361 | DECLARE_MAC_BUF(mac); | |
362 | ||
07346f81 | 363 | spin_lock_bh(&sta->lock); |
cee24a3e | 364 | state = sta->ampdu_mlme.tid_state_tx[tid]; |
07346f81 | 365 | spin_unlock_bh(&sta->lock); |
0c11b4de RR |
366 | |
367 | if (state == HT_AGG_STATE_IDLE && | |
368 | rs_tl_get_load(lq_data, tid) > IWL_AGG_LOAD_THRESHOLD) { | |
369 | IWL_DEBUG_HT("Starting Tx agg: STA: %s tid: %d\n", | |
370 | print_mac(mac, sta->addr), tid); | |
371 | ieee80211_start_tx_ba_session(priv->hw, sta->addr, tid); | |
372 | } | |
373 | } | |
374 | ||
c79dd5b5 | 375 | static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
0c11b4de RR |
376 | struct iwl4965_lq_sta *lq_data, |
377 | struct sta_info *sta) | |
378 | { | |
379 | if ((tid < TID_MAX_LOAD_COUNT)) | |
380 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
381 | else if (tid == IWL_AGG_ALL_TID) | |
382 | for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) | |
383 | rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); | |
384 | } | |
385 | ||
386 | #endif /* CONFIG_IWLWIFI_HT */ | |
387 | ||
39e88504 | 388 | static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
fde0db31 | 389 | { |
39e88504 GC |
390 | return (!!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
391 | !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + | |
392 | !!(rate_n_flags & RATE_MCS_ANT_C_MSK)); | |
fde0db31 GC |
393 | } |
394 | ||
77626355 BC |
395 | /** |
396 | * rs_collect_tx_data - Update the success/failure sliding window | |
397 | * | |
398 | * We keep a sliding window of the last 62 packets transmitted | |
399 | * at this rate. window->data contains the bitmask of successful | |
400 | * packets. | |
401 | */ | |
bb8c093b | 402 | static int rs_collect_tx_data(struct iwl4965_rate_scale_data *windows, |
99556438 RR |
403 | int scale_index, s32 tpt, int retries, |
404 | int successes) | |
b481de9c | 405 | { |
bb8c093b | 406 | struct iwl4965_rate_scale_data *window = NULL; |
39e88504 | 407 | static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
b481de9c ZY |
408 | s32 fail_count; |
409 | ||
dc2453ae TW |
410 | if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
411 | return -EINVAL; | |
b481de9c | 412 | |
77626355 | 413 | /* Select data for current tx bit rate */ |
b481de9c ZY |
414 | window = &(windows[scale_index]); |
415 | ||
77626355 BC |
416 | /* |
417 | * Keep track of only the latest 62 tx frame attempts in this rate's | |
418 | * history window; anything older isn't really relevant any more. | |
419 | * If we have filled up the sliding window, drop the oldest attempt; | |
420 | * if the oldest attempt (highest bit in bitmap) shows "success", | |
421 | * subtract "1" from the success counter (this is the main reason | |
422 | * we keep these bitmaps!). | |
423 | */ | |
99556438 | 424 | while (retries > 0) { |
39e88504 GC |
425 | if (window->counter >= IWL_RATE_MAX_WINDOW) { |
426 | ||
427 | /* remove earliest */ | |
428 | window->counter = IWL_RATE_MAX_WINDOW - 1; | |
429 | ||
99556438 RR |
430 | if (window->data & mask) { |
431 | window->data &= ~mask; | |
39e88504 | 432 | window->success_counter--; |
99556438 | 433 | } |
b481de9c | 434 | } |
b481de9c | 435 | |
99556438 RR |
436 | /* Increment frames-attempted counter */ |
437 | window->counter++; | |
438 | ||
439 | /* Shift bitmap by one frame (throw away oldest history), | |
440 | * OR in "1", and increment "success" if this | |
441 | * frame was successful. */ | |
39e88504 | 442 | window->data <<= 1;; |
99556438 | 443 | if (successes > 0) { |
39e88504 | 444 | window->success_counter++; |
99556438 RR |
445 | window->data |= 0x1; |
446 | successes--; | |
447 | } | |
77626355 | 448 | |
99556438 | 449 | retries--; |
b481de9c ZY |
450 | } |
451 | ||
77626355 | 452 | /* Calculate current success ratio, avoid divide-by-0! */ |
b481de9c ZY |
453 | if (window->counter > 0) |
454 | window->success_ratio = 128 * (100 * window->success_counter) | |
455 | / window->counter; | |
456 | else | |
457 | window->success_ratio = IWL_INVALID_VALUE; | |
458 | ||
459 | fail_count = window->counter - window->success_counter; | |
460 | ||
77626355 | 461 | /* Calculate average throughput, if we have enough history. */ |
b481de9c ZY |
462 | if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
463 | (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) | |
464 | window->average_tpt = (window->success_ratio * tpt + 64) / 128; | |
465 | else | |
466 | window->average_tpt = IWL_INVALID_VALUE; | |
467 | ||
77626355 | 468 | /* Tag this window as having been updated */ |
b481de9c ZY |
469 | window->stamp = jiffies; |
470 | ||
dc2453ae | 471 | return 0; |
b481de9c ZY |
472 | } |
473 | ||
77626355 BC |
474 | /* |
475 | * Fill uCode API rate_n_flags field, based on "search" or "active" table. | |
476 | */ | |
39e88504 GC |
477 | /* FIXME:RS:remove this function and put the flags statically in the table */ |
478 | static u32 rate_n_flags_from_tbl(struct iwl4965_scale_tbl_info *tbl, | |
479 | int index, u8 use_green) | |
b481de9c | 480 | { |
39e88504 GC |
481 | u32 rate_n_flags = 0; |
482 | ||
b481de9c | 483 | if (is_legacy(tbl->lq_type)) { |
1826dcc0 | 484 | rate_n_flags = iwl_rates[index].plcp; |
b481de9c | 485 | if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
39e88504 | 486 | rate_n_flags |= RATE_MCS_CCK_MSK; |
b481de9c | 487 | |
fde0db31 GC |
488 | } else if (is_Ht(tbl->lq_type)) { |
489 | if (index > IWL_LAST_OFDM_RATE) { | |
490 | IWL_ERROR("invalid HT rate index %d\n", index); | |
b481de9c | 491 | index = IWL_LAST_OFDM_RATE; |
fde0db31 | 492 | } |
39e88504 | 493 | rate_n_flags = RATE_MCS_HT_MSK; |
fde0db31 GC |
494 | |
495 | if (is_siso(tbl->lq_type)) | |
1826dcc0 | 496 | rate_n_flags |= iwl_rates[index].plcp_siso; |
fde0db31 | 497 | else if (is_mimo2(tbl->lq_type)) |
1826dcc0 | 498 | rate_n_flags |= iwl_rates[index].plcp_mimo2; |
fde0db31 | 499 | else |
1826dcc0 | 500 | rate_n_flags |= iwl_rates[index].plcp_mimo3; |
b481de9c | 501 | } else { |
fde0db31 | 502 | IWL_ERROR("Invalid tbl->lq_type %d\n", tbl->lq_type); |
b481de9c ZY |
503 | } |
504 | ||
39e88504 | 505 | rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) & |
fde0db31 | 506 | RATE_MCS_ANT_ABC_MSK); |
b481de9c | 507 | |
39e88504 GC |
508 | if (is_Ht(tbl->lq_type)) { |
509 | if (tbl->is_fat) { | |
510 | if (tbl->is_dup) | |
511 | rate_n_flags |= RATE_MCS_DUP_MSK; | |
512 | else | |
513 | rate_n_flags |= RATE_MCS_FAT_MSK; | |
514 | } | |
515 | if (tbl->is_SGI) | |
516 | rate_n_flags |= RATE_MCS_SGI_MSK; | |
517 | ||
518 | if (use_green) { | |
519 | rate_n_flags |= RATE_MCS_GF_MSK; | |
520 | if (is_siso(tbl->lq_type) && tbl->is_SGI) { | |
521 | rate_n_flags &= ~RATE_MCS_SGI_MSK; | |
522 | IWL_ERROR("GF was set with SGI:SISO\n"); | |
523 | } | |
524 | } | |
b481de9c | 525 | } |
39e88504 | 526 | return rate_n_flags; |
b481de9c ZY |
527 | } |
528 | ||
77626355 BC |
529 | /* |
530 | * Interpret uCode API's rate_n_flags format, | |
531 | * fill "search" or "active" tx mode table. | |
532 | */ | |
39e88504 | 533 | static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
8318d78a JB |
534 | enum ieee80211_band band, |
535 | struct iwl4965_scale_tbl_info *tbl, | |
b481de9c ZY |
536 | int *rate_idx) |
537 | { | |
39e88504 GC |
538 | u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
539 | u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); | |
540 | u8 mcs; | |
b481de9c | 541 | |
39e88504 | 542 | *rate_idx = iwl4965_hwrate_to_plcp_idx(rate_n_flags); |
b481de9c | 543 | |
fde0db31 | 544 | if (*rate_idx == IWL_RATE_INVALID) { |
b481de9c | 545 | *rate_idx = -1; |
dc2453ae | 546 | return -EINVAL; |
b481de9c | 547 | } |
77626355 | 548 | tbl->is_SGI = 0; /* default legacy setup */ |
b481de9c ZY |
549 | tbl->is_fat = 0; |
550 | tbl->is_dup = 0; | |
fde0db31 GC |
551 | tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
552 | tbl->lq_type = LQ_NONE; | |
b481de9c | 553 | |
77626355 | 554 | /* legacy rate format */ |
39e88504 | 555 | if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
fde0db31 | 556 | if (num_of_ant == 1) { |
8318d78a | 557 | if (band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
558 | tbl->lq_type = LQ_A; |
559 | else | |
560 | tbl->lq_type = LQ_G; | |
b481de9c | 561 | } |
fde0db31 | 562 | /* HT rate format */ |
b481de9c | 563 | } else { |
39e88504 | 564 | if (rate_n_flags & RATE_MCS_SGI_MSK) |
b481de9c ZY |
565 | tbl->is_SGI = 1; |
566 | ||
39e88504 GC |
567 | if ((rate_n_flags & RATE_MCS_FAT_MSK) || |
568 | (rate_n_flags & RATE_MCS_DUP_MSK)) | |
b481de9c ZY |
569 | tbl->is_fat = 1; |
570 | ||
39e88504 | 571 | if (rate_n_flags & RATE_MCS_DUP_MSK) |
b481de9c | 572 | tbl->is_dup = 1; |
fde0db31 | 573 | |
39e88504 | 574 | mcs = rs_extract_rate(rate_n_flags); |
fde0db31 | 575 | |
39e88504 GC |
576 | /* SISO */ |
577 | if (mcs <= IWL_RATE_SISO_60M_PLCP) { | |
fde0db31 GC |
578 | if (num_of_ant == 1) |
579 | tbl->lq_type = LQ_SISO; /*else NONE*/ | |
580 | /* MIMO2 */ | |
39e88504 | 581 | } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
fde0db31 GC |
582 | if (num_of_ant == 2) |
583 | tbl->lq_type = LQ_MIMO2; | |
584 | /* MIMO3 */ | |
585 | } else { | |
586 | if (num_of_ant == 3) | |
587 | tbl->lq_type = LQ_MIMO3; | |
588 | } | |
b481de9c ZY |
589 | } |
590 | return 0; | |
591 | } | |
aade00ce GC |
592 | |
593 | /* switch to another antenna/antennas and return 1 */ | |
594 | /* if no other valid antenna found, return 0 */ | |
595 | static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, | |
596 | struct iwl4965_scale_tbl_info *tbl) | |
b481de9c | 597 | { |
aade00ce GC |
598 | u8 new_ant_type; |
599 | ||
600 | if (!tbl->ant_type || tbl->ant_type > ANT_ABC) | |
601 | return 0; | |
602 | ||
603 | if (!rs_is_valid_ant(valid_ant, tbl->ant_type)) | |
604 | return 0; | |
605 | ||
606 | new_ant_type = ant_toggle_lookup[tbl->ant_type]; | |
607 | ||
608 | while ((new_ant_type != tbl->ant_type) && | |
609 | !rs_is_valid_ant(valid_ant, new_ant_type)) | |
610 | new_ant_type = ant_toggle_lookup[new_ant_type]; | |
611 | ||
612 | if (new_ant_type == tbl->ant_type) | |
613 | return 0; | |
614 | ||
615 | tbl->ant_type = new_ant_type; | |
616 | *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; | |
617 | *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; | |
618 | return 1; | |
b481de9c ZY |
619 | } |
620 | ||
39e88504 | 621 | /* FIXME:RS: in 4965 we don't use greenfield at all */ |
f935a6da GC |
622 | /* FIXME:RS: don't use greenfield for now in TX */ |
623 | /* #ifdef CONFIG_IWL4965_HT */ | |
624 | #if 0 | |
625 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) | |
b481de9c | 626 | { |
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); | |
f935a6da | 630 | } |
39e88504 | 631 | #else |
f935a6da GC |
632 | static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) |
633 | { | |
dc2453ae | 634 | return 0; |
b481de9c | 635 | } |
f935a6da | 636 | #endif /* CONFIG_IWL4965_HT */ |
b481de9c ZY |
637 | |
638 | /** | |
639 | * rs_get_supported_rates - get the available rates | |
640 | * | |
641 | * if management frame or broadcast frame only return | |
642 | * basic available rates. | |
643 | * | |
644 | */ | |
eecd6e57 | 645 | static u16 rs_get_supported_rates(struct iwl4965_lq_sta *lq_sta, |
b481de9c | 646 | struct ieee80211_hdr *hdr, |
eecd6e57 | 647 | enum iwl_table_type rate_type) |
b481de9c | 648 | { |
eecd6e57 GC |
649 | if (hdr && is_multicast_ether_addr(hdr->addr1) && |
650 | lq_sta->active_rate_basic) | |
651 | return lq_sta->active_rate_basic; | |
652 | ||
653 | if (is_legacy(rate_type)) { | |
654 | return lq_sta->active_legacy_rate; | |
655 | } else { | |
b481de9c | 656 | if (is_siso(rate_type)) |
eecd6e57 | 657 | return lq_sta->active_siso_rate; |
fde0db31 | 658 | else if (is_mimo2(rate_type)) |
eecd6e57 | 659 | return lq_sta->active_mimo2_rate; |
b481de9c | 660 | else |
eecd6e57 | 661 | return lq_sta->active_mimo3_rate; |
c33104f0 | 662 | } |
b481de9c ZY |
663 | } |
664 | ||
bf403db8 EK |
665 | static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask, |
666 | int rate_type) | |
b481de9c ZY |
667 | { |
668 | u8 high = IWL_RATE_INVALID; | |
669 | u8 low = IWL_RATE_INVALID; | |
670 | ||
01ebd063 | 671 | /* 802.11A or ht walks to the next literal adjacent rate in |
b481de9c ZY |
672 | * the rate table */ |
673 | if (is_a_band(rate_type) || !is_legacy(rate_type)) { | |
674 | int i; | |
675 | u32 mask; | |
676 | ||
677 | /* Find the previous rate that is in the rate mask */ | |
678 | i = index - 1; | |
679 | for (mask = (1 << i); i >= 0; i--, mask >>= 1) { | |
680 | if (rate_mask & mask) { | |
681 | low = i; | |
682 | break; | |
683 | } | |
684 | } | |
685 | ||
686 | /* Find the next rate that is in the rate mask */ | |
687 | i = index + 1; | |
688 | for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { | |
689 | if (rate_mask & mask) { | |
690 | high = i; | |
691 | break; | |
692 | } | |
693 | } | |
694 | ||
695 | return (high << 8) | low; | |
696 | } | |
697 | ||
698 | low = index; | |
699 | while (low != IWL_RATE_INVALID) { | |
1826dcc0 | 700 | low = iwl_rates[low].prev_rs; |
b481de9c ZY |
701 | if (low == IWL_RATE_INVALID) |
702 | break; | |
703 | if (rate_mask & (1 << low)) | |
704 | break; | |
705 | IWL_DEBUG_RATE("Skipping masked lower rate: %d\n", low); | |
706 | } | |
707 | ||
708 | high = index; | |
709 | while (high != IWL_RATE_INVALID) { | |
1826dcc0 | 710 | high = iwl_rates[high].next_rs; |
b481de9c ZY |
711 | if (high == IWL_RATE_INVALID) |
712 | break; | |
713 | if (rate_mask & (1 << high)) | |
714 | break; | |
715 | IWL_DEBUG_RATE("Skipping masked higher rate: %d\n", high); | |
716 | } | |
717 | ||
718 | return (high << 8) | low; | |
719 | } | |
720 | ||
39e88504 | 721 | static u32 rs_get_lower_rate(struct iwl4965_lq_sta *lq_sta, |
bb8c093b | 722 | struct iwl4965_scale_tbl_info *tbl, u8 scale_index, |
39e88504 | 723 | u8 ht_possible) |
b481de9c | 724 | { |
b481de9c ZY |
725 | s32 low; |
726 | u16 rate_mask; | |
727 | u16 high_low; | |
728 | u8 switch_to_legacy = 0; | |
c33104f0 | 729 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
730 | |
731 | /* check if we need to switch from HT to legacy rates. | |
732 | * assumption is that mandatory rates (1Mbps or 6Mbps) | |
733 | * are always supported (spec demand) */ | |
734 | if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_index)) { | |
735 | switch_to_legacy = 1; | |
736 | scale_index = rs_ht_to_legacy[scale_index]; | |
8318d78a | 737 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c ZY |
738 | tbl->lq_type = LQ_A; |
739 | else | |
740 | tbl->lq_type = LQ_G; | |
741 | ||
69fdb309 | 742 | if (num_of_ant(tbl->ant_type) > 1) |
fde0db31 | 743 | tbl->ant_type = ANT_A;/*FIXME:RS*/ |
b481de9c ZY |
744 | |
745 | tbl->is_fat = 0; | |
746 | tbl->is_SGI = 0; | |
747 | } | |
748 | ||
eecd6e57 | 749 | rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
b481de9c | 750 | |
77626355 | 751 | /* Mask with station rate restriction */ |
b481de9c | 752 | if (is_legacy(tbl->lq_type)) { |
77626355 | 753 | /* supp_rates has no CCK bits in A mode */ |
8318d78a | 754 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
b481de9c | 755 | rate_mask = (u16)(rate_mask & |
c33104f0 | 756 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c | 757 | else |
c33104f0 | 758 | rate_mask = (u16)(rate_mask & lq_sta->supp_rates); |
b481de9c ZY |
759 | } |
760 | ||
77626355 | 761 | /* If we switched from HT to legacy, check current rate */ |
dc2453ae | 762 | if (switch_to_legacy && (rate_mask & (1 << scale_index))) { |
39e88504 GC |
763 | low = scale_index; |
764 | goto out; | |
b481de9c ZY |
765 | } |
766 | ||
bf403db8 EK |
767 | high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask, |
768 | tbl->lq_type); | |
b481de9c ZY |
769 | low = high_low & 0xff; |
770 | ||
39e88504 GC |
771 | if (low == IWL_RATE_INVALID) |
772 | low = scale_index; | |
773 | ||
774 | out: | |
775 | return rate_n_flags_from_tbl(tbl, low, is_green); | |
b481de9c ZY |
776 | } |
777 | ||
77626355 BC |
778 | /* |
779 | * mac80211 sends us Tx status | |
780 | */ | |
c33104f0 | 781 | static void rs_tx_status(void *priv_rate, struct net_device *dev, |
b481de9c ZY |
782 | struct sk_buff *skb, |
783 | struct ieee80211_tx_status *tx_resp) | |
784 | { | |
785 | int status; | |
786 | u8 retries; | |
787 | int rs_index, index = 0; | |
c33104f0 | 788 | struct iwl4965_lq_sta *lq_sta; |
66c73db7 | 789 | struct iwl_link_quality_cmd *table; |
b481de9c ZY |
790 | struct sta_info *sta; |
791 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
c79dd5b5 | 792 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
b481de9c | 793 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
4c424e4c | 794 | struct ieee80211_hw *hw = local_to_hw(local); |
bb8c093b CH |
795 | struct iwl4965_rate_scale_data *window = NULL; |
796 | struct iwl4965_rate_scale_data *search_win = NULL; | |
39e88504 | 797 | u32 tx_rate; |
bb8c093b CH |
798 | struct iwl4965_scale_tbl_info tbl_type; |
799 | struct iwl4965_scale_tbl_info *curr_tbl, *search_tbl; | |
b481de9c ZY |
800 | u8 active_index = 0; |
801 | u16 fc = le16_to_cpu(hdr->frame_control); | |
802 | s32 tpt = 0; | |
803 | ||
58826351 | 804 | IWL_DEBUG_RATE_LIMIT("get frame ack response, update rate scale window\n"); |
b481de9c ZY |
805 | |
806 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) | |
807 | return; | |
808 | ||
99556438 RR |
809 | /* This packet was aggregated but doesn't carry rate scale info */ |
810 | if ((tx_resp->control.flags & IEEE80211_TXCTL_AMPDU) && | |
811 | !(tx_resp->flags & IEEE80211_TX_STATUS_AMPDU)) | |
812 | return; | |
813 | ||
b481de9c ZY |
814 | retries = tx_resp->retry_count; |
815 | ||
816 | if (retries > 15) | |
817 | retries = 15; | |
818 | ||
d0709a65 | 819 | rcu_read_lock(); |
b481de9c ZY |
820 | |
821 | sta = sta_info_get(local, hdr->addr1); | |
822 | ||
f4d6082d TW |
823 | if (!sta || !sta->rate_ctrl_priv) |
824 | goto out; | |
825 | ||
b481de9c | 826 | |
c33104f0 | 827 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
b481de9c ZY |
828 | |
829 | if (!priv->lq_mngr.lq_ready) | |
f4d6082d | 830 | goto out; |
b481de9c | 831 | |
c33104f0 TW |
832 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && |
833 | !lq_sta->ibss_sta_added) | |
f4d6082d | 834 | goto out; |
b481de9c | 835 | |
c33104f0 TW |
836 | table = &lq_sta->lq; |
837 | active_index = lq_sta->active_tbl; | |
b481de9c | 838 | |
c33104f0 TW |
839 | curr_tbl = &(lq_sta->lq_info[active_index]); |
840 | search_tbl = &(lq_sta->lq_info[(1 - active_index)]); | |
bb8c093b | 841 | window = (struct iwl4965_rate_scale_data *) |
b481de9c | 842 | &(curr_tbl->win[0]); |
bb8c093b | 843 | search_win = (struct iwl4965_rate_scale_data *) |
b481de9c ZY |
844 | &(search_tbl->win[0]); |
845 | ||
77626355 BC |
846 | /* |
847 | * Ignore this Tx frame response if its initial rate doesn't match | |
848 | * that of latest Link Quality command. There may be stragglers | |
849 | * from a previous Link Quality command, but we're no longer interested | |
850 | * in those; they're either from the "active" mode while we're trying | |
851 | * to check "search" mode, or a prior "search" mode after we've moved | |
852 | * to a new "search" mode (which might become the new "active" mode). | |
853 | */ | |
39e88504 GC |
854 | tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
855 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
4c424e4c RR |
856 | if (priv->band == IEEE80211_BAND_5GHZ) |
857 | rs_index -= IWL_FIRST_OFDM_RATE; | |
858 | ||
859 | if ((tx_resp->control.tx_rate == NULL) || | |
860 | (tbl_type.is_SGI ^ | |
861 | !!(tx_resp->control.flags & IEEE80211_TXCTL_SHORT_GI)) || | |
862 | (tbl_type.is_fat ^ | |
863 | !!(tx_resp->control.flags & IEEE80211_TXCTL_40_MHZ_WIDTH)) || | |
864 | (tbl_type.is_dup ^ | |
865 | !!(tx_resp->control.flags & IEEE80211_TXCTL_DUP_DATA)) || | |
fde0db31 | 866 | (tbl_type.ant_type ^ tx_resp->control.antenna_sel_tx) || |
39e88504 | 867 | (!!(tx_rate & RATE_MCS_HT_MSK) ^ |
4c424e4c | 868 | !!(tx_resp->control.flags & IEEE80211_TXCTL_OFDM_HT)) || |
39e88504 | 869 | (!!(tx_rate & RATE_MCS_GF_MSK) ^ |
4c424e4c RR |
870 | !!(tx_resp->control.flags & IEEE80211_TXCTL_GREEN_FIELD)) || |
871 | (hw->wiphy->bands[priv->band]->bitrates[rs_index].bitrate != | |
872 | tx_resp->control.tx_rate->bitrate)) { | |
39e88504 | 873 | IWL_DEBUG_RATE("initial rate does not match 0x%x\n", tx_rate); |
f4d6082d | 874 | goto out; |
b481de9c ZY |
875 | } |
876 | ||
77626355 | 877 | /* Update frame history window with "failure" for each Tx retry. */ |
b481de9c | 878 | while (retries) { |
77626355 BC |
879 | /* Look up the rate and other info used for each tx attempt. |
880 | * Each tx attempt steps one entry deeper in the rate table. */ | |
39e88504 GC |
881 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
882 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, | |
b481de9c ZY |
883 | &tbl_type, &rs_index); |
884 | ||
77626355 BC |
885 | /* If type matches "search" table, |
886 | * add failure to "search" history */ | |
b481de9c | 887 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 888 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
889 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
890 | if (search_tbl->expected_tpt) | |
891 | tpt = search_tbl->expected_tpt[rs_index]; | |
892 | else | |
893 | tpt = 0; | |
99556438 | 894 | rs_collect_tx_data(search_win, rs_index, tpt, 1, 0); |
77626355 BC |
895 | |
896 | /* Else if type matches "current/active" table, | |
897 | * add failure to "current/active" history */ | |
b481de9c | 898 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 899 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
900 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
901 | if (curr_tbl->expected_tpt) | |
902 | tpt = curr_tbl->expected_tpt[rs_index]; | |
903 | else | |
904 | tpt = 0; | |
99556438 | 905 | rs_collect_tx_data(window, rs_index, tpt, 1, 0); |
b481de9c | 906 | } |
77626355 BC |
907 | |
908 | /* If not searching for a new mode, increment failed counter | |
909 | * ... this helps determine when to start searching again */ | |
c33104f0 TW |
910 | if (lq_sta->stay_in_tbl) |
911 | lq_sta->total_failed++; | |
b481de9c ZY |
912 | --retries; |
913 | index++; | |
914 | ||
915 | } | |
916 | ||
77626355 BC |
917 | /* |
918 | * Find (by rate) the history window to update with final Tx attempt; | |
919 | * if Tx was successful first try, use original rate, | |
920 | * else look up the rate that was, finally, successful. | |
921 | */ | |
39e88504 GC |
922 | tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); |
923 | rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); | |
b481de9c | 924 | |
77626355 | 925 | /* Update frame history window with "success" if Tx got ACKed ... */ |
b481de9c ZY |
926 | if (tx_resp->flags & IEEE80211_TX_STATUS_ACK) |
927 | status = 1; | |
928 | else | |
929 | status = 0; | |
930 | ||
77626355 BC |
931 | /* If type matches "search" table, |
932 | * add final tx status to "search" history */ | |
b481de9c | 933 | if ((tbl_type.lq_type == search_tbl->lq_type) && |
fde0db31 | 934 | (tbl_type.ant_type == search_tbl->ant_type) && |
b481de9c ZY |
935 | (tbl_type.is_SGI == search_tbl->is_SGI)) { |
936 | if (search_tbl->expected_tpt) | |
937 | tpt = search_tbl->expected_tpt[rs_index]; | |
938 | else | |
939 | tpt = 0; | |
99556438 RR |
940 | if (tx_resp->control.flags & IEEE80211_TXCTL_AMPDU) |
941 | rs_collect_tx_data(search_win, rs_index, tpt, | |
942 | tx_resp->ampdu_ack_len, | |
943 | tx_resp->ampdu_ack_map); | |
944 | else | |
945 | rs_collect_tx_data(search_win, rs_index, tpt, | |
946 | 1, status); | |
77626355 BC |
947 | /* Else if type matches "current/active" table, |
948 | * add final tx status to "current/active" history */ | |
b481de9c | 949 | } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
fde0db31 | 950 | (tbl_type.ant_type == curr_tbl->ant_type) && |
b481de9c ZY |
951 | (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
952 | if (curr_tbl->expected_tpt) | |
953 | tpt = curr_tbl->expected_tpt[rs_index]; | |
954 | else | |
955 | tpt = 0; | |
99556438 RR |
956 | if (tx_resp->control.flags & IEEE80211_TXCTL_AMPDU) |
957 | rs_collect_tx_data(window, rs_index, tpt, | |
958 | tx_resp->ampdu_ack_len, | |
959 | tx_resp->ampdu_ack_map); | |
960 | else | |
961 | rs_collect_tx_data(window, rs_index, tpt, | |
962 | 1, status); | |
b481de9c ZY |
963 | } |
964 | ||
77626355 BC |
965 | /* If not searching for new mode, increment success/failed counter |
966 | * ... these help determine when to start searching again */ | |
c33104f0 | 967 | if (lq_sta->stay_in_tbl) { |
99556438 RR |
968 | if (tx_resp->control.flags & IEEE80211_TXCTL_AMPDU) { |
969 | lq_sta->total_success += tx_resp->ampdu_ack_map; | |
970 | lq_sta->total_failed += | |
971 | (tx_resp->ampdu_ack_len - tx_resp->ampdu_ack_map); | |
972 | } else { | |
973 | if (status) | |
974 | lq_sta->total_success++; | |
975 | else | |
976 | lq_sta->total_failed++; | |
977 | } | |
b481de9c ZY |
978 | } |
979 | ||
77626355 | 980 | /* See if there's a better rate or modulation mode to try. */ |
b481de9c | 981 | rs_rate_scale_perform(priv, dev, hdr, sta); |
f4d6082d | 982 | out: |
d0709a65 | 983 | rcu_read_unlock(); |
b481de9c ZY |
984 | return; |
985 | } | |
986 | ||
77626355 BC |
987 | /* |
988 | * Begin a period of staying with a selected modulation mode. | |
989 | * Set "stay_in_tbl" flag to prevent any mode switches. | |
990 | * Set frame tx success limits according to legacy vs. high-throughput, | |
991 | * and reset overall (spanning all rates) tx success history statistics. | |
992 | * These control how long we stay using same modulation mode before | |
993 | * searching for a new mode. | |
994 | */ | |
bf403db8 | 995 | static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, |
c33104f0 | 996 | struct iwl4965_lq_sta *lq_sta) |
b481de9c | 997 | { |
eecd6e57 | 998 | IWL_DEBUG_RATE("we are staying in the same table\n"); |
c33104f0 | 999 | lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
b481de9c | 1000 | if (is_legacy) { |
c33104f0 TW |
1001 | lq_sta->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
1002 | lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; | |
1003 | lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 1004 | } else { |
c33104f0 TW |
1005 | lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
1006 | lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; | |
1007 | lq_sta->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; | |
b481de9c | 1008 | } |
c33104f0 TW |
1009 | lq_sta->table_count = 0; |
1010 | lq_sta->total_failed = 0; | |
1011 | lq_sta->total_success = 0; | |
b481de9c ZY |
1012 | } |
1013 | ||
77626355 BC |
1014 | /* |
1015 | * Find correct throughput table for given mode of modulation | |
1016 | */ | |
eecd6e57 | 1017 | static void rs_set_expected_tpt_table(struct iwl4965_lq_sta *lq_sta, |
bb8c093b | 1018 | struct iwl4965_scale_tbl_info *tbl) |
b481de9c ZY |
1019 | { |
1020 | if (is_legacy(tbl->lq_type)) { | |
1021 | if (!is_a_band(tbl->lq_type)) | |
1022 | tbl->expected_tpt = expected_tpt_G; | |
1023 | else | |
1024 | tbl->expected_tpt = expected_tpt_A; | |
1025 | } else if (is_siso(tbl->lq_type)) { | |
c33104f0 | 1026 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1027 | if (tbl->is_SGI) |
1028 | tbl->expected_tpt = expected_tpt_siso40MHzSGI; | |
1029 | else | |
1030 | tbl->expected_tpt = expected_tpt_siso40MHz; | |
1031 | else if (tbl->is_SGI) | |
1032 | tbl->expected_tpt = expected_tpt_siso20MHzSGI; | |
1033 | else | |
1034 | tbl->expected_tpt = expected_tpt_siso20MHz; | |
1035 | ||
fde0db31 | 1036 | } else if (is_mimo(tbl->lq_type)) { /* FIXME:need to separate mimo2/3 */ |
c33104f0 | 1037 | if (tbl->is_fat && !lq_sta->is_dup) |
b481de9c ZY |
1038 | if (tbl->is_SGI) |
1039 | tbl->expected_tpt = expected_tpt_mimo40MHzSGI; | |
1040 | else | |
1041 | tbl->expected_tpt = expected_tpt_mimo40MHz; | |
1042 | else if (tbl->is_SGI) | |
1043 | tbl->expected_tpt = expected_tpt_mimo20MHzSGI; | |
1044 | else | |
1045 | tbl->expected_tpt = expected_tpt_mimo20MHz; | |
1046 | } else | |
1047 | tbl->expected_tpt = expected_tpt_G; | |
1048 | } | |
1049 | ||
c8b0e6e1 | 1050 | #ifdef CONFIG_IWL4965_HT |
77626355 BC |
1051 | /* |
1052 | * Find starting rate for new "search" high-throughput mode of modulation. | |
1053 | * Goal is to find lowest expected rate (under perfect conditions) that is | |
1054 | * above the current measured throughput of "active" mode, to give new mode | |
1055 | * a fair chance to prove itself without too many challenges. | |
1056 | * | |
1057 | * This gets called when transitioning to more aggressive modulation | |
1058 | * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive | |
1059 | * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need | |
1060 | * to decrease to match "active" throughput. When moving from MIMO to SISO, | |
1061 | * bit rate will typically need to increase, but not if performance was bad. | |
1062 | */ | |
c79dd5b5 | 1063 | static s32 rs_get_best_rate(struct iwl_priv *priv, |
c33104f0 | 1064 | struct iwl4965_lq_sta *lq_sta, |
77626355 | 1065 | struct iwl4965_scale_tbl_info *tbl, /* "search" */ |
f935a6da | 1066 | u16 rate_mask, s8 index) |
b481de9c | 1067 | { |
77626355 | 1068 | /* "active" values */ |
bb8c093b | 1069 | struct iwl4965_scale_tbl_info *active_tbl = |
c33104f0 | 1070 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1071 | s32 active_sr = active_tbl->win[index].success_ratio; |
b481de9c | 1072 | s32 active_tpt = active_tbl->expected_tpt[index]; |
77626355 BC |
1073 | |
1074 | /* expected "search" throughput */ | |
1075 | s32 *tpt_tbl = tbl->expected_tpt; | |
1076 | ||
1077 | s32 new_rate, high, low, start_hi; | |
b481de9c | 1078 | u16 high_low; |
f935a6da | 1079 | s8 rate = index; |
b481de9c ZY |
1080 | |
1081 | new_rate = high = low = start_hi = IWL_RATE_INVALID; | |
1082 | ||
1083 | for (; ;) { | |
bf403db8 EK |
1084 | high_low = rs_get_adjacent_rate(priv, rate, rate_mask, |
1085 | tbl->lq_type); | |
b481de9c ZY |
1086 | |
1087 | low = high_low & 0xff; | |
1088 | high = (high_low >> 8) & 0xff; | |
1089 | ||
77626355 BC |
1090 | /* |
1091 | * Lower the "search" bit rate, to give new "search" mode | |
1092 | * approximately the same throughput as "active" if: | |
1093 | * | |
1094 | * 1) "Active" mode has been working modestly well (but not | |
1095 | * great), and expected "search" throughput (under perfect | |
1096 | * conditions) at candidate rate is above the actual | |
1097 | * measured "active" throughput (but less than expected | |
1098 | * "active" throughput under perfect conditions). | |
1099 | * OR | |
1100 | * 2) "Active" mode has been working perfectly or very well | |
1101 | * and expected "search" throughput (under perfect | |
1102 | * conditions) at candidate rate is above expected | |
1103 | * "active" throughput (under perfect conditions). | |
1104 | */ | |
c33104f0 | 1105 | if ((((100 * tpt_tbl[rate]) > lq_sta->last_tpt) && |
b481de9c ZY |
1106 | ((active_sr > IWL_RATE_DECREASE_TH) && |
1107 | (active_sr <= IWL_RATE_HIGH_TH) && | |
1108 | (tpt_tbl[rate] <= active_tpt))) || | |
1109 | ((active_sr >= IWL_RATE_SCALE_SWITCH) && | |
1110 | (tpt_tbl[rate] > active_tpt))) { | |
1111 | ||
77626355 BC |
1112 | /* (2nd or later pass) |
1113 | * If we've already tried to raise the rate, and are | |
1114 | * now trying to lower it, use the higher rate. */ | |
b481de9c ZY |
1115 | if (start_hi != IWL_RATE_INVALID) { |
1116 | new_rate = start_hi; | |
1117 | break; | |
1118 | } | |
77626355 | 1119 | |
b481de9c | 1120 | new_rate = rate; |
77626355 BC |
1121 | |
1122 | /* Loop again with lower rate */ | |
b481de9c ZY |
1123 | if (low != IWL_RATE_INVALID) |
1124 | rate = low; | |
77626355 BC |
1125 | |
1126 | /* Lower rate not available, use the original */ | |
b481de9c ZY |
1127 | else |
1128 | break; | |
77626355 BC |
1129 | |
1130 | /* Else try to raise the "search" rate to match "active" */ | |
b481de9c | 1131 | } else { |
77626355 BC |
1132 | /* (2nd or later pass) |
1133 | * If we've already tried to lower the rate, and are | |
1134 | * now trying to raise it, use the lower rate. */ | |
b481de9c ZY |
1135 | if (new_rate != IWL_RATE_INVALID) |
1136 | break; | |
77626355 BC |
1137 | |
1138 | /* Loop again with higher rate */ | |
b481de9c ZY |
1139 | else if (high != IWL_RATE_INVALID) { |
1140 | start_hi = high; | |
1141 | rate = high; | |
77626355 BC |
1142 | |
1143 | /* Higher rate not available, use the original */ | |
b481de9c ZY |
1144 | } else { |
1145 | new_rate = rate; | |
1146 | break; | |
1147 | } | |
1148 | } | |
1149 | } | |
1150 | ||
1151 | return new_rate; | |
1152 | } | |
c8b0e6e1 | 1153 | #endif /* CONFIG_IWL4965_HT */ |
b481de9c | 1154 | |
77626355 BC |
1155 | /* |
1156 | * Set up search table for MIMO | |
1157 | */ | |
fde0db31 GC |
1158 | #ifdef CONFIG_IWL4965_HT |
1159 | static int rs_switch_to_mimo2(struct iwl_priv *priv, | |
c33104f0 | 1160 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1161 | struct ieee80211_conf *conf, |
1162 | struct sta_info *sta, | |
bb8c093b | 1163 | struct iwl4965_scale_tbl_info *tbl, int index) |
b481de9c | 1164 | { |
b481de9c ZY |
1165 | u16 rate_mask; |
1166 | s32 rate; | |
c33104f0 | 1167 | s8 is_green = lq_sta->is_green; |
b481de9c | 1168 | |
270243a5 RR |
1169 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
1170 | !sta->ht_info.ht_supported) | |
b481de9c ZY |
1171 | return -1; |
1172 | ||
270243a5 | 1173 | if (priv->current_ht_config.tx_mimo_ps_mode == IWL_MIMO_PS_STATIC) |
b481de9c ZY |
1174 | return -1; |
1175 | ||
77626355 | 1176 | /* Need both Tx chains/antennas to support MIMO */ |
aade00ce | 1177 | if (priv->hw_params.tx_chains_num < 2) |
b481de9c ZY |
1178 | return -1; |
1179 | ||
eecd6e57 | 1180 | IWL_DEBUG_RATE("LQ: try to switch to MIMO2\n"); |
39e88504 GC |
1181 | |
1182 | tbl->lq_type = LQ_MIMO2; | |
c33104f0 | 1183 | tbl->is_dup = lq_sta->is_dup; |
b481de9c | 1184 | tbl->action = 0; |
39e88504 GC |
1185 | rate_mask = lq_sta->active_mimo2_rate; |
1186 | ||
270243a5 | 1187 | if (priv->current_ht_config.supported_chan_width |
39e88504 | 1188 | == IWL_CHANNEL_WIDTH_40MHZ) |
b481de9c ZY |
1189 | tbl->is_fat = 1; |
1190 | else | |
1191 | tbl->is_fat = 0; | |
1192 | ||
39e88504 | 1193 | /* FIXME: - don't toggle SGI here |
b481de9c | 1194 | if (tbl->is_fat) { |
270243a5 | 1195 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1196 | tbl->is_SGI = 1; |
1197 | else | |
1198 | tbl->is_SGI = 0; | |
270243a5 | 1199 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1200 | tbl->is_SGI = 1; |
1201 | else | |
1202 | tbl->is_SGI = 0; | |
39e88504 | 1203 | */ |
b481de9c | 1204 | |
eecd6e57 | 1205 | rs_set_expected_tpt_table(lq_sta, tbl); |
b481de9c | 1206 | |
f935a6da | 1207 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1208 | |
eecd6e57 | 1209 | IWL_DEBUG_RATE("LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
39e88504 GC |
1210 | |
1211 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { | |
eecd6e57 | 1212 | IWL_DEBUG_RATE("Can't switch with index %d rate mask %x\n", |
39e88504 | 1213 | rate, rate_mask); |
b481de9c | 1214 | return -1; |
39e88504 GC |
1215 | } |
1216 | tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green); | |
b481de9c | 1217 | |
eecd6e57 | 1218 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1219 | tbl->current_rate, is_green); |
dc2453ae | 1220 | return 0; |
fde0db31 | 1221 | } |
403ab56b | 1222 | #else |
fde0db31 GC |
1223 | static int rs_switch_to_mimo2(struct iwl_priv *priv, |
1224 | struct iwl4965_lq_sta *lq_sta, | |
1225 | struct ieee80211_conf *conf, | |
1226 | struct sta_info *sta, | |
1227 | struct iwl4965_scale_tbl_info *tbl, int index) | |
1228 | { | |
403ab56b | 1229 | return -1; |
b481de9c | 1230 | } |
fde0db31 | 1231 | #endif /*CONFIG_IWL4965_HT */ |
b481de9c | 1232 | |
77626355 BC |
1233 | /* |
1234 | * Set up search table for SISO | |
1235 | */ | |
c79dd5b5 | 1236 | static int rs_switch_to_siso(struct iwl_priv *priv, |
c33104f0 | 1237 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1238 | struct ieee80211_conf *conf, |
1239 | struct sta_info *sta, | |
bb8c093b | 1240 | struct iwl4965_scale_tbl_info *tbl, int index) |
b481de9c | 1241 | { |
c8b0e6e1 | 1242 | #ifdef CONFIG_IWL4965_HT |
b481de9c | 1243 | u16 rate_mask; |
c33104f0 | 1244 | u8 is_green = lq_sta->is_green; |
b481de9c ZY |
1245 | s32 rate; |
1246 | ||
270243a5 RR |
1247 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || |
1248 | !sta->ht_info.ht_supported) | |
b481de9c ZY |
1249 | return -1; |
1250 | ||
eecd6e57 | 1251 | IWL_DEBUG_RATE("LQ: try to switch to SISO\n"); |
39e88504 | 1252 | |
c33104f0 | 1253 | tbl->is_dup = lq_sta->is_dup; |
b481de9c ZY |
1254 | tbl->lq_type = LQ_SISO; |
1255 | tbl->action = 0; | |
39e88504 | 1256 | rate_mask = lq_sta->active_siso_rate; |
b481de9c | 1257 | |
270243a5 RR |
1258 | if (priv->current_ht_config.supported_chan_width |
1259 | == IWL_CHANNEL_WIDTH_40MHZ) | |
b481de9c ZY |
1260 | tbl->is_fat = 1; |
1261 | else | |
1262 | tbl->is_fat = 0; | |
1263 | ||
39e88504 | 1264 | /* FIXME: - don't toggle SGI here |
b481de9c | 1265 | if (tbl->is_fat) { |
270243a5 | 1266 | if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) |
b481de9c ZY |
1267 | tbl->is_SGI = 1; |
1268 | else | |
1269 | tbl->is_SGI = 0; | |
270243a5 | 1270 | } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) |
b481de9c ZY |
1271 | tbl->is_SGI = 1; |
1272 | else | |
1273 | tbl->is_SGI = 0; | |
39e88504 | 1274 | */ |
b481de9c ZY |
1275 | |
1276 | if (is_green) | |
39e88504 | 1277 | tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/ |
b481de9c | 1278 | |
eecd6e57 | 1279 | rs_set_expected_tpt_table(lq_sta, tbl); |
f935a6da | 1280 | rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
b481de9c | 1281 | |
eecd6e57 | 1282 | IWL_DEBUG_RATE("LQ: get best rate %d mask %X\n", rate, rate_mask); |
b481de9c | 1283 | if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
eecd6e57 | 1284 | IWL_DEBUG_RATE("can not switch with index %d rate mask %x\n", |
b481de9c ZY |
1285 | rate, rate_mask); |
1286 | return -1; | |
1287 | } | |
39e88504 | 1288 | tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green); |
eecd6e57 | 1289 | IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n", |
39e88504 | 1290 | tbl->current_rate, is_green); |
403ab56b MA |
1291 | return 0; |
1292 | #else | |
1293 | return -1; | |
0c11b4de | 1294 | #endif /*CONFIG_IWL4965_HT */ |
b481de9c ZY |
1295 | } |
1296 | ||
77626355 BC |
1297 | /* |
1298 | * Try to switch to new modulation mode from legacy | |
1299 | */ | |
c79dd5b5 | 1300 | static int rs_move_legacy_other(struct iwl_priv *priv, |
c33104f0 | 1301 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1302 | struct ieee80211_conf *conf, |
1303 | struct sta_info *sta, | |
b481de9c ZY |
1304 | int index) |
1305 | { | |
bb8c093b | 1306 | struct iwl4965_scale_tbl_info *tbl = |
c33104f0 | 1307 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
bb8c093b | 1308 | struct iwl4965_scale_tbl_info *search_tbl = |
c33104f0 | 1309 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
bb8c093b CH |
1310 | struct iwl4965_rate_scale_data *window = &(tbl->win[index]); |
1311 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - | |
1312 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1313 | u8 start_action = tbl->action; |
fde0db31 GC |
1314 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1315 | int ret = 0; | |
b481de9c ZY |
1316 | |
1317 | for (; ;) { | |
1318 | switch (tbl->action) { | |
1319 | case IWL_LEGACY_SWITCH_ANTENNA: | |
f935a6da | 1320 | IWL_DEBUG_RATE("LQ: Legacy toggle Antenna\n"); |
b481de9c | 1321 | |
c33104f0 | 1322 | lq_sta->action_counter++; |
77626355 BC |
1323 | |
1324 | /* Don't change antenna if success has been great */ | |
b481de9c ZY |
1325 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1326 | break; | |
77626355 | 1327 | |
77626355 | 1328 | /* Set up search table to try other antenna */ |
b481de9c ZY |
1329 | memcpy(search_tbl, tbl, sz); |
1330 | ||
aade00ce GC |
1331 | if (rs_toggle_antenna(valid_tx_ant, |
1332 | &search_tbl->current_rate, search_tbl)) { | |
aade00ce GC |
1333 | lq_sta->search_better_tbl = 1; |
1334 | goto out; | |
1335 | } | |
b481de9c ZY |
1336 | |
1337 | case IWL_LEGACY_SWITCH_SISO: | |
eecd6e57 | 1338 | IWL_DEBUG_RATE("LQ: Legacy switch to SISO\n"); |
77626355 BC |
1339 | |
1340 | /* Set up search table to try SISO */ | |
b481de9c | 1341 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1342 | search_tbl->is_SGI = 0; |
c33104f0 | 1343 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1344 | search_tbl, index); |
dc2453ae | 1345 | if (!ret) { |
c33104f0 TW |
1346 | lq_sta->search_better_tbl = 1; |
1347 | lq_sta->action_counter = 0; | |
b481de9c | 1348 | goto out; |
dc2453ae | 1349 | } |
b481de9c ZY |
1350 | |
1351 | break; | |
fde0db31 | 1352 | case IWL_LEGACY_SWITCH_MIMO2: |
eecd6e57 | 1353 | IWL_DEBUG_RATE("LQ: Legacy switch to MIMO2\n"); |
77626355 BC |
1354 | |
1355 | /* Set up search table to try MIMO */ | |
b481de9c | 1356 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1357 | search_tbl->is_SGI = 0; |
fde0db31 GC |
1358 | search_tbl->ant_type = ANT_AB;/*FIXME:RS*/ |
1359 | /*FIXME:RS:need to check ant validity*/ | |
1360 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, | |
270243a5 | 1361 | search_tbl, index); |
dc2453ae | 1362 | if (!ret) { |
c33104f0 TW |
1363 | lq_sta->search_better_tbl = 1; |
1364 | lq_sta->action_counter = 0; | |
b481de9c | 1365 | goto out; |
dc2453ae | 1366 | } |
b481de9c ZY |
1367 | break; |
1368 | } | |
1369 | tbl->action++; | |
fde0db31 | 1370 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2) |
b481de9c ZY |
1371 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; |
1372 | ||
1373 | if (tbl->action == start_action) | |
1374 | break; | |
1375 | ||
1376 | } | |
1377 | return 0; | |
1378 | ||
1379 | out: | |
1380 | tbl->action++; | |
fde0db31 | 1381 | if (tbl->action > IWL_LEGACY_SWITCH_MIMO2) |
b481de9c ZY |
1382 | tbl->action = IWL_LEGACY_SWITCH_ANTENNA; |
1383 | return 0; | |
1384 | ||
1385 | } | |
1386 | ||
77626355 BC |
1387 | /* |
1388 | * Try to switch to new modulation mode from SISO | |
1389 | */ | |
c79dd5b5 | 1390 | static int rs_move_siso_to_other(struct iwl_priv *priv, |
c33104f0 | 1391 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1392 | struct ieee80211_conf *conf, |
1393 | struct sta_info *sta, | |
b481de9c ZY |
1394 | int index) |
1395 | { | |
c33104f0 | 1396 | u8 is_green = lq_sta->is_green; |
bb8c093b | 1397 | struct iwl4965_scale_tbl_info *tbl = |
c33104f0 | 1398 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
bb8c093b | 1399 | struct iwl4965_scale_tbl_info *search_tbl = |
c33104f0 | 1400 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
bb8c093b CH |
1401 | struct iwl4965_rate_scale_data *window = &(tbl->win[index]); |
1402 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - | |
1403 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1404 | u8 start_action = tbl->action; |
fde0db31 GC |
1405 | u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
1406 | int ret; | |
b481de9c ZY |
1407 | |
1408 | for (;;) { | |
c33104f0 | 1409 | lq_sta->action_counter++; |
b481de9c ZY |
1410 | switch (tbl->action) { |
1411 | case IWL_SISO_SWITCH_ANTENNA: | |
eecd6e57 | 1412 | IWL_DEBUG_RATE("LQ: SISO toggle Antenna\n"); |
b481de9c ZY |
1413 | if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
1414 | break; | |
b481de9c ZY |
1415 | |
1416 | memcpy(search_tbl, tbl, sz); | |
aade00ce GC |
1417 | if (rs_toggle_antenna(valid_tx_ant, |
1418 | &search_tbl->current_rate, search_tbl)) { | |
1419 | lq_sta->search_better_tbl = 1; | |
1420 | goto out; | |
1421 | } | |
b481de9c | 1422 | |
fde0db31 | 1423 | case IWL_SISO_SWITCH_MIMO2: |
eecd6e57 | 1424 | IWL_DEBUG_RATE("LQ: SISO switch to MIMO\n"); |
b481de9c | 1425 | memcpy(search_tbl, tbl, sz); |
b481de9c | 1426 | search_tbl->is_SGI = 0; |
fde0db31 GC |
1427 | search_tbl->ant_type = ANT_AB; /*FIXME:RS*/ |
1428 | ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, | |
270243a5 | 1429 | search_tbl, index); |
dc2453ae | 1430 | if (!ret) { |
c33104f0 | 1431 | lq_sta->search_better_tbl = 1; |
b481de9c | 1432 | goto out; |
dc2453ae | 1433 | } |
b481de9c ZY |
1434 | break; |
1435 | case IWL_SISO_SWITCH_GI: | |
eecd6e57 | 1436 | IWL_DEBUG_RATE("LQ: SISO toggle SGI/NGI\n"); |
0c11b4de | 1437 | |
b481de9c | 1438 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1439 | if (is_green) { |
1440 | if (!tbl->is_SGI) | |
1441 | break; | |
1442 | else | |
1443 | IWL_ERROR("SGI was set in GF+SISO\n"); | |
b481de9c | 1444 | } |
39e88504 | 1445 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1446 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
39e88504 GC |
1447 | if (tbl->is_SGI) { |
1448 | s32 tpt = lq_sta->last_tpt / 100; | |
1449 | if (tpt >= search_tbl->expected_tpt[index]) | |
1450 | break; | |
1451 | } | |
1452 | search_tbl->current_rate = rate_n_flags_from_tbl( | |
1453 | search_tbl, index, is_green); | |
1454 | lq_sta->search_better_tbl = 1; | |
b481de9c ZY |
1455 | goto out; |
1456 | } | |
1457 | tbl->action++; | |
1458 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1459 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1460 | ||
1461 | if (tbl->action == start_action) | |
1462 | break; | |
1463 | } | |
1464 | return 0; | |
1465 | ||
1466 | out: | |
1467 | tbl->action++; | |
1468 | if (tbl->action > IWL_SISO_SWITCH_GI) | |
1469 | tbl->action = IWL_SISO_SWITCH_ANTENNA; | |
1470 | return 0; | |
1471 | } | |
1472 | ||
77626355 BC |
1473 | /* |
1474 | * Try to switch to new modulation mode from MIMO | |
1475 | */ | |
c79dd5b5 | 1476 | static int rs_move_mimo_to_other(struct iwl_priv *priv, |
c33104f0 | 1477 | struct iwl4965_lq_sta *lq_sta, |
270243a5 RR |
1478 | struct ieee80211_conf *conf, |
1479 | struct sta_info *sta, | |
b481de9c ZY |
1480 | int index) |
1481 | { | |
c33104f0 | 1482 | s8 is_green = lq_sta->is_green; |
bb8c093b | 1483 | struct iwl4965_scale_tbl_info *tbl = |
c33104f0 | 1484 | &(lq_sta->lq_info[lq_sta->active_tbl]); |
bb8c093b | 1485 | struct iwl4965_scale_tbl_info *search_tbl = |
c33104f0 | 1486 | &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
bb8c093b CH |
1487 | u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - |
1488 | (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); | |
b481de9c | 1489 | u8 start_action = tbl->action; |
aade00ce GC |
1490 | /*u8 valid_tx_ant = priv->hw_params.valid_tx_ant;*/ |
1491 | int ret; | |
b481de9c ZY |
1492 | |
1493 | for (;;) { | |
c33104f0 | 1494 | lq_sta->action_counter++; |
b481de9c ZY |
1495 | switch (tbl->action) { |
1496 | case IWL_MIMO_SWITCH_ANTENNA_A: | |
1497 | case IWL_MIMO_SWITCH_ANTENNA_B: | |
eecd6e57 | 1498 | IWL_DEBUG_RATE("LQ: MIMO2 switch to SISO\n"); |
0c11b4de | 1499 | |
77626355 | 1500 | /* Set up new search table for SISO */ |
b481de9c | 1501 | memcpy(search_tbl, tbl, sz); |
39e88504 GC |
1502 | |
1503 | /*FIXME:RS:need to check ant validity + C*/ | |
b481de9c | 1504 | if (tbl->action == IWL_MIMO_SWITCH_ANTENNA_A) |
fde0db31 | 1505 | search_tbl->ant_type = ANT_A; |
b481de9c | 1506 | else |
fde0db31 | 1507 | search_tbl->ant_type = ANT_B; |
b481de9c | 1508 | |
c33104f0 | 1509 | ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
270243a5 | 1510 | search_tbl, index); |
dc2453ae | 1511 | if (!ret) { |
c33104f0 | 1512 | lq_sta->search_better_tbl = 1; |
b481de9c ZY |
1513 | goto out; |
1514 | } | |
1515 | break; | |
1516 | ||
1517 | case IWL_MIMO_SWITCH_GI: | |
eecd6e57 | 1518 | IWL_DEBUG_RATE("LQ: MIMO toggle SGI/NGI\n"); |
77626355 BC |
1519 | |
1520 | /* Set up new search table for MIMO */ | |
b481de9c | 1521 | memcpy(search_tbl, tbl, sz); |
39e88504 | 1522 | search_tbl->is_SGI = !tbl->is_SGI; |
eecd6e57 | 1523 | rs_set_expected_tpt_table(lq_sta, search_tbl); |
77626355 BC |
1524 | /* |
1525 | * If active table already uses the fastest possible | |
1526 | * modulation (dual stream with short guard interval), | |
1527 | * and it's working well, there's no need to look | |
1528 | * for a better type of modulation! | |
1529 | */ | |
39e88504 | 1530 | if (tbl->is_SGI) { |
c33104f0 | 1531 | s32 tpt = lq_sta->last_tpt / 100; |
39e88504 GC |
1532 | if (tpt >= search_tbl->expected_tpt[index]) |
1533 | break; | |
b481de9c | 1534 | } |
39e88504 GC |
1535 | search_tbl->current_rate = rate_n_flags_from_tbl( |
1536 | search_tbl, index, is_green); | |
1537 | lq_sta->search_better_tbl = 1; | |
b481de9c ZY |
1538 | goto out; |
1539 | ||
1540 | } | |
1541 | tbl->action++; | |
1542 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1543 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1544 | ||
1545 | if (tbl->action == start_action) | |
1546 | break; | |
1547 | } | |
1548 | ||
1549 | return 0; | |
1550 | out: | |
1551 | tbl->action++; | |
1552 | if (tbl->action > IWL_MIMO_SWITCH_GI) | |
1553 | tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; | |
1554 | return 0; | |
1555 | ||
1556 | } | |
1557 | ||
77626355 BC |
1558 | /* |
1559 | * Check whether we should continue using same modulation mode, or | |
1560 | * begin search for a new mode, based on: | |
1561 | * 1) # tx successes or failures while using this mode | |
1562 | * 2) # times calling this function | |
1563 | * 3) elapsed time in this mode (not used, for now) | |
1564 | */ | |
c33104f0 | 1565 | static void rs_stay_in_table(struct iwl4965_lq_sta *lq_sta) |
b481de9c | 1566 | { |
bb8c093b | 1567 | struct iwl4965_scale_tbl_info *tbl; |
b481de9c ZY |
1568 | int i; |
1569 | int active_tbl; | |
1570 | int flush_interval_passed = 0; | |
bf403db8 | 1571 | struct iwl_priv *priv; |
b481de9c | 1572 | |
bf403db8 | 1573 | priv = lq_sta->drv; |
c33104f0 | 1574 | active_tbl = lq_sta->active_tbl; |
b481de9c | 1575 | |
c33104f0 | 1576 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c | 1577 | |
77626355 | 1578 | /* If we've been disallowing search, see if we should now allow it */ |
c33104f0 | 1579 | if (lq_sta->stay_in_tbl) { |
b481de9c | 1580 | |
77626355 | 1581 | /* Elapsed time using current modulation mode */ |
c33104f0 | 1582 | if (lq_sta->flush_timer) |
b481de9c ZY |
1583 | flush_interval_passed = |
1584 | time_after(jiffies, | |
c33104f0 | 1585 | (unsigned long)(lq_sta->flush_timer + |
b481de9c ZY |
1586 | IWL_RATE_SCALE_FLUSH_INTVL)); |
1587 | ||
77626355 BC |
1588 | /* |
1589 | * Check if we should allow search for new modulation mode. | |
1590 | * If many frames have failed or succeeded, or we've used | |
1591 | * this same modulation for a long time, allow search, and | |
1592 | * reset history stats that keep track of whether we should | |
1593 | * allow a new search. Also (below) reset all bitmaps and | |
1594 | * stats in active history. | |
1595 | */ | |
c33104f0 TW |
1596 | if ((lq_sta->total_failed > lq_sta->max_failure_limit) || |
1597 | (lq_sta->total_success > lq_sta->max_success_limit) || | |
1598 | ((!lq_sta->search_better_tbl) && (lq_sta->flush_timer) | |
b481de9c | 1599 | && (flush_interval_passed))) { |
eecd6e57 | 1600 | IWL_DEBUG_RATE("LQ: stay is expired %d %d %d\n:", |
c33104f0 TW |
1601 | lq_sta->total_failed, |
1602 | lq_sta->total_success, | |
b481de9c | 1603 | flush_interval_passed); |
77626355 BC |
1604 | |
1605 | /* Allow search for new mode */ | |
c33104f0 TW |
1606 | lq_sta->stay_in_tbl = 0; /* only place reset */ |
1607 | lq_sta->total_failed = 0; | |
1608 | lq_sta->total_success = 0; | |
1609 | lq_sta->flush_timer = 0; | |
77626355 BC |
1610 | |
1611 | /* | |
1612 | * Else if we've used this modulation mode enough repetitions | |
1613 | * (regardless of elapsed time or success/failure), reset | |
1614 | * history bitmaps and rate-specific stats for all rates in | |
1615 | * active table. | |
1616 | */ | |
403ab56b | 1617 | } else { |
c33104f0 TW |
1618 | lq_sta->table_count++; |
1619 | if (lq_sta->table_count >= | |
1620 | lq_sta->table_count_limit) { | |
1621 | lq_sta->table_count = 0; | |
b481de9c | 1622 | |
eecd6e57 | 1623 | IWL_DEBUG_RATE("LQ: stay in table clear win\n"); |
b481de9c ZY |
1624 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1625 | rs_rate_scale_clear_window( | |
1626 | &(tbl->win[i])); | |
1627 | } | |
1628 | } | |
1629 | ||
77626355 BC |
1630 | /* If transitioning to allow "search", reset all history |
1631 | * bitmaps and stats in active table (this will become the new | |
1632 | * "search" table). */ | |
c33104f0 | 1633 | if (!lq_sta->stay_in_tbl) { |
b481de9c ZY |
1634 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1635 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1636 | } | |
1637 | } | |
1638 | } | |
1639 | ||
77626355 BC |
1640 | /* |
1641 | * Do rate scaling and search for new modulation mode. | |
1642 | */ | |
c79dd5b5 | 1643 | static void rs_rate_scale_perform(struct iwl_priv *priv, |
b481de9c ZY |
1644 | struct net_device *dev, |
1645 | struct ieee80211_hdr *hdr, | |
1646 | struct sta_info *sta) | |
1647 | { | |
270243a5 RR |
1648 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
1649 | struct ieee80211_hw *hw = local_to_hw(local); | |
1650 | struct ieee80211_conf *conf = &hw->conf; | |
b481de9c ZY |
1651 | int low = IWL_RATE_INVALID; |
1652 | int high = IWL_RATE_INVALID; | |
1653 | int index; | |
1654 | int i; | |
bb8c093b | 1655 | struct iwl4965_rate_scale_data *window = NULL; |
b481de9c ZY |
1656 | int current_tpt = IWL_INVALID_VALUE; |
1657 | int low_tpt = IWL_INVALID_VALUE; | |
1658 | int high_tpt = IWL_INVALID_VALUE; | |
1659 | u32 fail_count; | |
1660 | s8 scale_action = 0; | |
1661 | u16 fc, rate_mask; | |
1662 | u8 update_lq = 0; | |
c33104f0 | 1663 | struct iwl4965_lq_sta *lq_sta; |
bb8c093b | 1664 | struct iwl4965_scale_tbl_info *tbl, *tbl1; |
b481de9c | 1665 | u16 rate_scale_index_msk = 0; |
39e88504 | 1666 | u32 rate; |
b481de9c ZY |
1667 | u8 is_green = 0; |
1668 | u8 active_tbl = 0; | |
1669 | u8 done_search = 0; | |
1670 | u16 high_low; | |
0c11b4de RR |
1671 | #ifdef CONFIG_IWL4965_HT |
1672 | u8 tid = MAX_TID_COUNT; | |
1673 | __le16 *qc; | |
1674 | #endif | |
b481de9c ZY |
1675 | |
1676 | IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); | |
1677 | ||
1678 | fc = le16_to_cpu(hdr->frame_control); | |
1679 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { | |
1680 | /* Send management frames and broadcast/multicast data using | |
1681 | * lowest rate. */ | |
1682 | /* TODO: this could probably be improved.. */ | |
1683 | return; | |
1684 | } | |
1685 | ||
1686 | if (!sta || !sta->rate_ctrl_priv) | |
1687 | return; | |
1688 | ||
1689 | if (!priv->lq_mngr.lq_ready) { | |
1690 | IWL_DEBUG_RATE("still rate scaling not ready\n"); | |
1691 | return; | |
1692 | } | |
c33104f0 | 1693 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
b481de9c | 1694 | |
0c11b4de RR |
1695 | #ifdef CONFIG_IWL4965_HT |
1696 | qc = ieee80211_get_qos_ctrl(hdr); | |
1697 | if (qc) { | |
1698 | tid = (u8)(le16_to_cpu(*qc) & 0xf); | |
1699 | rs_tl_add_packet(lq_sta, tid); | |
1700 | } | |
1701 | #endif | |
77626355 BC |
1702 | /* |
1703 | * Select rate-scale / modulation-mode table to work with in | |
1704 | * the rest of this function: "search" if searching for better | |
1705 | * modulation mode, or "active" if doing rate scaling within a mode. | |
1706 | */ | |
c33104f0 TW |
1707 | if (!lq_sta->search_better_tbl) |
1708 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 1709 | else |
c33104f0 | 1710 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 1711 | |
c33104f0 TW |
1712 | tbl = &(lq_sta->lq_info[active_tbl]); |
1713 | is_green = lq_sta->is_green; | |
b481de9c | 1714 | |
77626355 | 1715 | /* current tx rate */ |
8318d78a | 1716 | index = sta->last_txrate_idx; |
b481de9c ZY |
1717 | |
1718 | IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index, | |
1719 | tbl->lq_type); | |
1720 | ||
77626355 | 1721 | /* rates available for this association, and for modulation mode */ |
eecd6e57 | 1722 | rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
b481de9c ZY |
1723 | |
1724 | IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask); | |
1725 | ||
1726 | /* mask with station rate restriction */ | |
1727 | if (is_legacy(tbl->lq_type)) { | |
8318d78a | 1728 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
77626355 | 1729 | /* supp_rates has no CCK bits in A mode */ |
b481de9c | 1730 | rate_scale_index_msk = (u16) (rate_mask & |
c33104f0 | 1731 | (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
b481de9c ZY |
1732 | else |
1733 | rate_scale_index_msk = (u16) (rate_mask & | |
c33104f0 | 1734 | lq_sta->supp_rates); |
b481de9c ZY |
1735 | |
1736 | } else | |
1737 | rate_scale_index_msk = rate_mask; | |
1738 | ||
1739 | if (!rate_scale_index_msk) | |
1740 | rate_scale_index_msk = rate_mask; | |
1741 | ||
07bc28ed GC |
1742 | if (!((1 << index) & rate_scale_index_msk)) { |
1743 | IWL_ERROR("Current Rate is not valid\n"); | |
1744 | return; | |
b481de9c ZY |
1745 | } |
1746 | ||
77626355 | 1747 | /* Get expected throughput table and history window for current rate */ |
07bc28ed GC |
1748 | if (!tbl->expected_tpt) { |
1749 | IWL_ERROR("tbl->expected_tpt is NULL\n"); | |
1750 | return; | |
1751 | } | |
b481de9c ZY |
1752 | |
1753 | window = &(tbl->win[index]); | |
1754 | ||
77626355 BC |
1755 | /* |
1756 | * If there is not enough history to calculate actual average | |
1757 | * throughput, keep analyzing results of more tx frames, without | |
1758 | * changing rate or mode (bypass most of the rest of this function). | |
1759 | * Set up new rate table in uCode only if old rate is not supported | |
1760 | * in current association (use new rate found above). | |
1761 | */ | |
b481de9c | 1762 | fail_count = window->counter - window->success_counter; |
07bc28ed GC |
1763 | if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
1764 | (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { | |
1765 | IWL_DEBUG_RATE("LQ: still below TH. succ=%d total=%d " | |
b481de9c ZY |
1766 | "for index %d\n", |
1767 | window->success_counter, window->counter, index); | |
77626355 BC |
1768 | |
1769 | /* Can't calculate this yet; not enough history */ | |
b481de9c | 1770 | window->average_tpt = IWL_INVALID_VALUE; |
77626355 BC |
1771 | |
1772 | /* Should we stay with this modulation mode, | |
1773 | * or search for a new one? */ | |
c33104f0 | 1774 | rs_stay_in_table(lq_sta); |
77626355 | 1775 | |
b481de9c ZY |
1776 | goto out; |
1777 | ||
77626355 BC |
1778 | /* Else we have enough samples; calculate estimate of |
1779 | * actual average throughput */ | |
07bc28ed GC |
1780 | } else { |
1781 | /*FIXME:RS remove this else if we don't get this error*/ | |
1782 | if (window->average_tpt != ((window->success_ratio * | |
1783 | tbl->expected_tpt[index] + 64) / 128)) { | |
1784 | IWL_ERROR("expected_tpt should have been calculated" | |
1785 | " by now\n"); | |
1786 | window->average_tpt = ((window->success_ratio * | |
b481de9c | 1787 | tbl->expected_tpt[index] + 64) / 128); |
07bc28ed GC |
1788 | } |
1789 | } | |
b481de9c | 1790 | |
77626355 | 1791 | /* If we are searching for better modulation mode, check success. */ |
c33104f0 | 1792 | if (lq_sta->search_better_tbl) { |
b481de9c | 1793 | |
77626355 BC |
1794 | /* If good success, continue using the "search" mode; |
1795 | * no need to send new link quality command, since we're | |
1796 | * continuing to use the setup that we've been trying. */ | |
07bc28ed GC |
1797 | if (window->average_tpt > lq_sta->last_tpt) { |
1798 | ||
1799 | IWL_DEBUG_RATE("LQ: SWITCHING TO CURRENT TABLE " | |
1800 | "suc=%d cur-tpt=%d old-tpt=%d\n", | |
1801 | window->success_ratio, | |
1802 | window->average_tpt, | |
1803 | lq_sta->last_tpt); | |
1804 | ||
1805 | if (!is_legacy(tbl->lq_type)) | |
c33104f0 | 1806 | lq_sta->enable_counter = 1; |
07bc28ed | 1807 | |
77626355 | 1808 | /* Swap tables; "search" becomes "active" */ |
c33104f0 | 1809 | lq_sta->active_tbl = active_tbl; |
b481de9c | 1810 | current_tpt = window->average_tpt; |
77626355 BC |
1811 | |
1812 | /* Else poor success; go back to mode in "active" table */ | |
b481de9c | 1813 | } else { |
07bc28ed GC |
1814 | |
1815 | IWL_DEBUG_RATE("LQ: GOING BACK TO THE OLD TABLE " | |
1816 | "suc=%d cur-tpt=%d old-tpt=%d\n", | |
1817 | window->success_ratio, | |
1818 | window->average_tpt, | |
1819 | lq_sta->last_tpt); | |
1820 | ||
77626355 | 1821 | /* Nullify "search" table */ |
b481de9c | 1822 | tbl->lq_type = LQ_NONE; |
77626355 BC |
1823 | |
1824 | /* Revert to "active" table */ | |
c33104f0 TW |
1825 | active_tbl = lq_sta->active_tbl; |
1826 | tbl = &(lq_sta->lq_info[active_tbl]); | |
b481de9c | 1827 | |
77626355 | 1828 | /* Revert to "active" rate and throughput info */ |
17744ff6 | 1829 | index = iwl4965_hwrate_to_plcp_idx( |
39e88504 | 1830 | tbl->current_rate); |
c33104f0 | 1831 | current_tpt = lq_sta->last_tpt; |
b481de9c | 1832 | |
77626355 | 1833 | /* Need to set up a new rate table in uCode */ |
b481de9c | 1834 | update_lq = 1; |
b481de9c | 1835 | } |
77626355 BC |
1836 | |
1837 | /* Either way, we've made a decision; modulation mode | |
1838 | * search is done, allow rate adjustment next time. */ | |
c33104f0 | 1839 | lq_sta->search_better_tbl = 0; |
77626355 | 1840 | done_search = 1; /* Don't switch modes below! */ |
b481de9c ZY |
1841 | goto lq_update; |
1842 | } | |
1843 | ||
77626355 BC |
1844 | /* (Else) not in search of better modulation mode, try for better |
1845 | * starting rate, while staying in this mode. */ | |
bf403db8 | 1846 | high_low = rs_get_adjacent_rate(priv, index, rate_scale_index_msk, |
b481de9c ZY |
1847 | tbl->lq_type); |
1848 | low = high_low & 0xff; | |
1849 | high = (high_low >> 8) & 0xff; | |
1850 | ||
77626355 | 1851 | /* Collect measured throughputs for current and adjacent rates */ |
b481de9c | 1852 | current_tpt = window->average_tpt; |
b481de9c ZY |
1853 | if (low != IWL_RATE_INVALID) |
1854 | low_tpt = tbl->win[low].average_tpt; | |
b481de9c ZY |
1855 | if (high != IWL_RATE_INVALID) |
1856 | high_tpt = tbl->win[high].average_tpt; | |
1857 | ||
77626355 | 1858 | /* Assume rate increase */ |
b481de9c ZY |
1859 | scale_action = 1; |
1860 | ||
77626355 | 1861 | /* Too many failures, decrease rate */ |
b481de9c ZY |
1862 | if ((window->success_ratio <= IWL_RATE_DECREASE_TH) || |
1863 | (current_tpt == 0)) { | |
1864 | IWL_DEBUG_RATE("decrease rate because of low success_ratio\n"); | |
1865 | scale_action = -1; | |
77626355 BC |
1866 | |
1867 | /* No throughput measured yet for adjacent rates; try increase. */ | |
b481de9c ZY |
1868 | } else if ((low_tpt == IWL_INVALID_VALUE) && |
1869 | (high_tpt == IWL_INVALID_VALUE)) | |
1870 | scale_action = 1; | |
77626355 BC |
1871 | |
1872 | /* Both adjacent throughputs are measured, but neither one has better | |
1873 | * throughput; we're using the best rate, don't change it! */ | |
b481de9c ZY |
1874 | else if ((low_tpt != IWL_INVALID_VALUE) && |
1875 | (high_tpt != IWL_INVALID_VALUE) && | |
1876 | (low_tpt < current_tpt) && | |
1877 | (high_tpt < current_tpt)) | |
1878 | scale_action = 0; | |
77626355 BC |
1879 | |
1880 | /* At least one adjacent rate's throughput is measured, | |
1881 | * and may have better performance. */ | |
b481de9c | 1882 | else { |
77626355 | 1883 | /* Higher adjacent rate's throughput is measured */ |
b481de9c | 1884 | if (high_tpt != IWL_INVALID_VALUE) { |
77626355 | 1885 | /* Higher rate has better throughput */ |
b481de9c ZY |
1886 | if (high_tpt > current_tpt) |
1887 | scale_action = 1; | |
1888 | else { | |
1889 | IWL_DEBUG_RATE | |
1890 | ("decrease rate because of high tpt\n"); | |
1891 | scale_action = -1; | |
1892 | } | |
77626355 BC |
1893 | |
1894 | /* Lower adjacent rate's throughput is measured */ | |
b481de9c | 1895 | } else if (low_tpt != IWL_INVALID_VALUE) { |
77626355 | 1896 | /* Lower rate has better throughput */ |
b481de9c ZY |
1897 | if (low_tpt > current_tpt) { |
1898 | IWL_DEBUG_RATE | |
1899 | ("decrease rate because of low tpt\n"); | |
1900 | scale_action = -1; | |
1901 | } else | |
1902 | scale_action = 1; | |
1903 | } | |
1904 | } | |
1905 | ||
77626355 BC |
1906 | /* Sanity check; asked for decrease, but success rate or throughput |
1907 | * has been good at old rate. Don't change it. */ | |
b481de9c ZY |
1908 | if (scale_action == -1) { |
1909 | if ((low != IWL_RATE_INVALID) && | |
1910 | ((window->success_ratio > IWL_RATE_HIGH_TH) || | |
1911 | (current_tpt > (100 * tbl->expected_tpt[low])))) | |
1912 | scale_action = 0; | |
77626355 BC |
1913 | |
1914 | /* Sanity check; asked for increase, but success rate has not been great | |
1915 | * even at old rate, higher rate will be worse. Don't change it. */ | |
b481de9c ZY |
1916 | } else if ((scale_action == 1) && |
1917 | (window->success_ratio < IWL_RATE_INCREASE_TH)) | |
1918 | scale_action = 0; | |
1919 | ||
1920 | switch (scale_action) { | |
1921 | case -1: | |
77626355 | 1922 | /* Decrease starting rate, update uCode's rate table */ |
b481de9c ZY |
1923 | if (low != IWL_RATE_INVALID) { |
1924 | update_lq = 1; | |
1925 | index = low; | |
1926 | } | |
1927 | break; | |
1928 | case 1: | |
77626355 | 1929 | /* Increase starting rate, update uCode's rate table */ |
b481de9c ZY |
1930 | if (high != IWL_RATE_INVALID) { |
1931 | update_lq = 1; | |
1932 | index = high; | |
1933 | } | |
1934 | ||
1935 | break; | |
1936 | case 0: | |
77626355 | 1937 | /* No change */ |
b481de9c ZY |
1938 | default: |
1939 | break; | |
1940 | } | |
1941 | ||
eecd6e57 | 1942 | IWL_DEBUG_RATE("choose rate scale index %d action %d low %d " |
b481de9c ZY |
1943 | "high %d type %d\n", |
1944 | index, scale_action, low, high, tbl->lq_type); | |
1945 | ||
1946 | lq_update: | |
77626355 | 1947 | /* Replace uCode's rate table for the destination station. */ |
b481de9c | 1948 | if (update_lq) { |
39e88504 | 1949 | rate = rate_n_flags_from_tbl(tbl, index, is_green); |
07bc28ed | 1950 | rs_fill_link_cmd(priv, lq_sta, rate); |
66c73db7 | 1951 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1952 | } |
77626355 BC |
1953 | |
1954 | /* Should we stay with this modulation mode, or search for a new one? */ | |
c33104f0 | 1955 | rs_stay_in_table(lq_sta); |
b481de9c | 1956 | |
77626355 BC |
1957 | /* |
1958 | * Search for new modulation mode if we're: | |
1959 | * 1) Not changing rates right now | |
1960 | * 2) Not just finishing up a search | |
1961 | * 3) Allowing a new search | |
1962 | */ | |
c33104f0 | 1963 | if (!update_lq && !done_search && !lq_sta->stay_in_tbl) { |
77626355 | 1964 | /* Save current throughput to compare with "search" throughput*/ |
c33104f0 | 1965 | lq_sta->last_tpt = current_tpt; |
b481de9c | 1966 | |
77626355 BC |
1967 | /* Select a new "search" modulation mode to try. |
1968 | * If one is found, set up the new "search" table. */ | |
b481de9c | 1969 | if (is_legacy(tbl->lq_type)) |
c33104f0 | 1970 | rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1971 | else if (is_siso(tbl->lq_type)) |
c33104f0 | 1972 | rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1973 | else |
c33104f0 | 1974 | rs_move_mimo_to_other(priv, lq_sta, conf, sta, index); |
b481de9c | 1975 | |
77626355 | 1976 | /* If new "search" mode was selected, set up in uCode table */ |
c33104f0 | 1977 | if (lq_sta->search_better_tbl) { |
77626355 | 1978 | /* Access the "search" table, clear its history. */ |
c33104f0 | 1979 | tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
b481de9c ZY |
1980 | for (i = 0; i < IWL_RATE_COUNT; i++) |
1981 | rs_rate_scale_clear_window(&(tbl->win[i])); | |
1982 | ||
77626355 | 1983 | /* Use new "search" start rate */ |
17744ff6 | 1984 | index = iwl4965_hwrate_to_plcp_idx( |
39e88504 | 1985 | tbl->current_rate); |
b481de9c | 1986 | |
eecd6e57 | 1987 | IWL_DEBUG_RATE("Switch current mcs: %X index: %d\n", |
39e88504 | 1988 | tbl->current_rate, index); |
07bc28ed | 1989 | rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
66c73db7 | 1990 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c | 1991 | } |
b481de9c | 1992 | |
77626355 BC |
1993 | /* If the "active" (non-search) mode was legacy, |
1994 | * and we've tried switching antennas, | |
1995 | * but we haven't been able to try HT modes (not available), | |
1996 | * stay with best antenna legacy modulation for a while | |
1997 | * before next round of mode comparisons. */ | |
c33104f0 | 1998 | tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); |
b481de9c | 1999 | if (is_legacy(tbl1->lq_type) && |
c8b0e6e1 | 2000 | #ifdef CONFIG_IWL4965_HT |
270243a5 | 2001 | (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) && |
b481de9c | 2002 | #endif |
c33104f0 TW |
2003 | (lq_sta->action_counter >= 1)) { |
2004 | lq_sta->action_counter = 0; | |
eecd6e57 | 2005 | IWL_DEBUG_RATE("LQ: STAY in legacy table\n"); |
bf403db8 | 2006 | rs_set_stay_in_table(priv, 1, lq_sta); |
b481de9c ZY |
2007 | } |
2008 | ||
77626355 BC |
2009 | /* If we're in an HT mode, and all 3 mode switch actions |
2010 | * have been tried and compared, stay in this best modulation | |
2011 | * mode for a while before next round of mode comparisons. */ | |
c33104f0 TW |
2012 | if (lq_sta->enable_counter && |
2013 | (lq_sta->action_counter >= IWL_ACTION_LIMIT)) { | |
0c11b4de RR |
2014 | #ifdef CONFIG_IWL4965_HT |
2015 | if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && | |
2016 | (lq_sta->tx_agg_tid_en & (1 << tid)) && | |
2017 | (tid != MAX_TID_COUNT)) { | |
eecd6e57 | 2018 | IWL_DEBUG_RATE("try to aggregate tid %d\n", tid); |
0c11b4de | 2019 | rs_tl_turn_on_agg(priv, tid, lq_sta, sta); |
b481de9c | 2020 | } |
0c11b4de | 2021 | #endif /*CONFIG_IWL4965_HT */ |
c33104f0 | 2022 | lq_sta->action_counter = 0; |
bf403db8 | 2023 | rs_set_stay_in_table(priv, 0, lq_sta); |
b481de9c | 2024 | } |
77626355 BC |
2025 | |
2026 | /* | |
2027 | * Else, don't search for a new modulation mode. | |
2028 | * Put new timestamp in stay-in-modulation-mode flush timer if: | |
2029 | * 1) Not changing rates right now | |
2030 | * 2) Not just finishing up a search | |
2031 | * 3) flush timer is empty | |
2032 | */ | |
b481de9c | 2033 | } else { |
c33104f0 TW |
2034 | if ((!update_lq) && (!done_search) && (!lq_sta->flush_timer)) |
2035 | lq_sta->flush_timer = jiffies; | |
b481de9c ZY |
2036 | } |
2037 | ||
2038 | out: | |
39e88504 | 2039 | tbl->current_rate = rate_n_flags_from_tbl(tbl, index, is_green); |
b481de9c | 2040 | i = index; |
8318d78a | 2041 | sta->last_txrate_idx = i; |
b481de9c | 2042 | |
8318d78a | 2043 | /* sta->txrate_idx is an index to A mode rates which start |
b481de9c ZY |
2044 | * at IWL_FIRST_OFDM_RATE |
2045 | */ | |
8318d78a JB |
2046 | if (lq_sta->band == IEEE80211_BAND_5GHZ) |
2047 | sta->txrate_idx = i - IWL_FIRST_OFDM_RATE; | |
b481de9c | 2048 | else |
8318d78a | 2049 | sta->txrate_idx = i; |
b481de9c ZY |
2050 | |
2051 | return; | |
2052 | } | |
2053 | ||
2054 | ||
c79dd5b5 | 2055 | static void rs_initialize_lq(struct iwl_priv *priv, |
270243a5 | 2056 | struct ieee80211_conf *conf, |
b481de9c ZY |
2057 | struct sta_info *sta) |
2058 | { | |
c33104f0 | 2059 | struct iwl4965_lq_sta *lq_sta; |
bb8c093b | 2060 | struct iwl4965_scale_tbl_info *tbl; |
b481de9c | 2061 | int rate_idx; |
aade00ce | 2062 | int i; |
39e88504 | 2063 | u32 rate; |
aade00ce GC |
2064 | u8 use_green = rs_use_green(priv, conf); |
2065 | u8 active_tbl = 0; | |
2066 | u8 valid_tx_ant; | |
b481de9c ZY |
2067 | |
2068 | if (!sta || !sta->rate_ctrl_priv) | |
2069 | goto out; | |
2070 | ||
c33104f0 | 2071 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
8318d78a | 2072 | i = sta->last_txrate_idx; |
b481de9c | 2073 | |
c33104f0 | 2074 | if ((lq_sta->lq.sta_id == 0xff) && |
b481de9c ZY |
2075 | (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) |
2076 | goto out; | |
2077 | ||
aade00ce GC |
2078 | valid_tx_ant = priv->hw_params.valid_tx_ant; |
2079 | ||
c33104f0 TW |
2080 | if (!lq_sta->search_better_tbl) |
2081 | active_tbl = lq_sta->active_tbl; | |
b481de9c | 2082 | else |
c33104f0 | 2083 | active_tbl = 1 - lq_sta->active_tbl; |
b481de9c | 2084 | |
c33104f0 | 2085 | tbl = &(lq_sta->lq_info[active_tbl]); |
b481de9c ZY |
2086 | |
2087 | if ((i < 0) || (i >= IWL_RATE_COUNT)) | |
2088 | i = 0; | |
2089 | ||
fde0db31 | 2090 | /* FIXME:RS: This is also wrong in 4965 */ |
1826dcc0 | 2091 | rate = iwl_rates[i].plcp; |
39e88504 GC |
2092 | rate |= RATE_MCS_ANT_B_MSK; |
2093 | rate &= ~RATE_MCS_ANT_A_MSK; | |
b481de9c ZY |
2094 | |
2095 | if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) | |
39e88504 | 2096 | rate |= RATE_MCS_CCK_MSK; |
b481de9c | 2097 | |
fde0db31 | 2098 | tbl->ant_type = ANT_B; |
39e88504 | 2099 | rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
aade00ce GC |
2100 | if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
2101 | rs_toggle_antenna(valid_tx_ant, &rate, tbl); | |
b481de9c | 2102 | |
39e88504 GC |
2103 | rate = rate_n_flags_from_tbl(tbl, rate_idx, use_green); |
2104 | tbl->current_rate = rate; | |
eecd6e57 | 2105 | rs_set_expected_tpt_table(lq_sta, tbl); |
07bc28ed | 2106 | rs_fill_link_cmd(NULL, lq_sta, rate); |
66c73db7 | 2107 | iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); |
b481de9c ZY |
2108 | out: |
2109 | return; | |
2110 | } | |
2111 | ||
1abbe498 | 2112 | static void rs_get_rate(void *priv_rate, struct net_device *dev, |
8318d78a JB |
2113 | struct ieee80211_supported_band *sband, |
2114 | struct sk_buff *skb, | |
1abbe498 | 2115 | struct rate_selection *sel) |
b481de9c ZY |
2116 | { |
2117 | ||
2118 | int i; | |
2119 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
270243a5 | 2120 | struct ieee80211_conf *conf = &local->hw.conf; |
b481de9c ZY |
2121 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
2122 | struct sta_info *sta; | |
2bc454b0 | 2123 | u16 fc; |
c79dd5b5 | 2124 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
c33104f0 | 2125 | struct iwl4965_lq_sta *lq_sta; |
b481de9c | 2126 | |
58826351 | 2127 | IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n"); |
b481de9c | 2128 | |
d0709a65 JB |
2129 | rcu_read_lock(); |
2130 | ||
b481de9c ZY |
2131 | sta = sta_info_get(local, hdr->addr1); |
2132 | ||
2bc454b0 MW |
2133 | /* Send management frames and broadcast/multicast data using lowest |
2134 | * rate. */ | |
2135 | fc = le16_to_cpu(hdr->frame_control); | |
2136 | if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1) || | |
2137 | !sta || !sta->rate_ctrl_priv) { | |
8318d78a | 2138 | sel->rate = rate_lowest(local, sband, sta); |
f4d6082d | 2139 | goto out; |
b481de9c ZY |
2140 | } |
2141 | ||
c33104f0 | 2142 | lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; |
8318d78a | 2143 | i = sta->last_txrate_idx; |
b481de9c | 2144 | |
c33104f0 TW |
2145 | if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && |
2146 | !lq_sta->ibss_sta_added) { | |
947b13a7 | 2147 | u8 sta_id = iwl_find_station(priv, hdr->addr1); |
0795af57 | 2148 | DECLARE_MAC_BUF(mac); |
b481de9c ZY |
2149 | |
2150 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
2151 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
2152 | print_mac(mac, hdr->addr1)); | |
4f40e4d9 | 2153 | sta_id = iwl_add_station_flags(priv, hdr->addr1, |
67d62035 | 2154 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2155 | } |
2156 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2157 | lq_sta->lq.sta_id = sta_id; |
2158 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
2159 | lq_sta->ibss_sta_added = 1; | |
270243a5 | 2160 | rs_initialize_lq(priv, conf, sta); |
b481de9c | 2161 | } |
c33104f0 | 2162 | if (!lq_sta->ibss_sta_added) |
b481de9c ZY |
2163 | goto done; |
2164 | } | |
2165 | ||
f4d6082d | 2166 | done: |
1abbe498 | 2167 | if ((i < 0) || (i > IWL_RATE_COUNT)) { |
8318d78a | 2168 | sel->rate = rate_lowest(local, sband, sta); |
f4d6082d | 2169 | goto out; |
1abbe498 | 2170 | } |
b481de9c | 2171 | |
1abbe498 | 2172 | sel->rate = &priv->ieee_rates[i]; |
f4d6082d TW |
2173 | out: |
2174 | rcu_read_unlock(); | |
b481de9c ZY |
2175 | } |
2176 | ||
bf403db8 | 2177 | static void *rs_alloc_sta(void *priv_rate, gfp_t gfp) |
b481de9c | 2178 | { |
c33104f0 | 2179 | struct iwl4965_lq_sta *lq_sta; |
bf403db8 | 2180 | struct iwl_priv *priv; |
b481de9c ZY |
2181 | int i, j; |
2182 | ||
bf403db8 | 2183 | priv = (struct iwl_priv *)priv_rate; |
b481de9c ZY |
2184 | IWL_DEBUG_RATE("create station rate scale window\n"); |
2185 | ||
c33104f0 | 2186 | lq_sta = kzalloc(sizeof(struct iwl4965_lq_sta), gfp); |
b481de9c | 2187 | |
c33104f0 | 2188 | if (lq_sta == NULL) |
b481de9c | 2189 | return NULL; |
c33104f0 | 2190 | lq_sta->lq.sta_id = 0xff; |
b481de9c | 2191 | |
63fddb9f | 2192 | |
b481de9c ZY |
2193 | for (j = 0; j < LQ_SIZE; j++) |
2194 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
c33104f0 | 2195 | rs_rate_scale_clear_window(&(lq_sta->lq_info[j].win[i])); |
b481de9c | 2196 | |
c33104f0 | 2197 | return lq_sta; |
b481de9c ZY |
2198 | } |
2199 | ||
2200 | static void rs_rate_init(void *priv_rate, void *priv_sta, | |
2201 | struct ieee80211_local *local, | |
2202 | struct sta_info *sta) | |
2203 | { | |
2204 | int i, j; | |
270243a5 | 2205 | struct ieee80211_conf *conf = &local->hw.conf; |
8318d78a | 2206 | struct ieee80211_supported_band *sband; |
c79dd5b5 | 2207 | struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
c33104f0 | 2208 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
b481de9c | 2209 | |
8318d78a JB |
2210 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
2211 | ||
c33104f0 | 2212 | lq_sta->flush_timer = 0; |
8318d78a JB |
2213 | lq_sta->supp_rates = sta->supp_rates[sband->band]; |
2214 | sta->txrate_idx = 3; | |
b481de9c ZY |
2215 | for (j = 0; j < LQ_SIZE; j++) |
2216 | for (i = 0; i < IWL_RATE_COUNT; i++) | |
c33104f0 | 2217 | rs_rate_scale_clear_window(&(lq_sta->lq_info[j].win[i])); |
b481de9c | 2218 | |
07bc28ed | 2219 | IWL_DEBUG_RATE("LQ: *** rate scale global init ***\n"); |
b481de9c ZY |
2220 | /* TODO: what is a good starting rate for STA? About middle? Maybe not |
2221 | * the lowest or the highest rate.. Could consider using RSSI from | |
2222 | * previous packets? Need to have IEEE 802.1X auth succeed immediately | |
2223 | * after assoc.. */ | |
2224 | ||
c33104f0 | 2225 | lq_sta->ibss_sta_added = 0; |
b481de9c | 2226 | if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { |
947b13a7 | 2227 | u8 sta_id = iwl_find_station(priv, sta->addr); |
0795af57 JP |
2228 | DECLARE_MAC_BUF(mac); |
2229 | ||
b481de9c | 2230 | /* for IBSS the call are from tasklet */ |
eecd6e57 | 2231 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
0795af57 | 2232 | print_mac(mac, sta->addr)); |
b481de9c ZY |
2233 | |
2234 | if (sta_id == IWL_INVALID_STATION) { | |
0795af57 JP |
2235 | IWL_DEBUG_RATE("LQ: ADD station %s\n", |
2236 | print_mac(mac, sta->addr)); | |
4f40e4d9 | 2237 | sta_id = iwl_add_station_flags(priv, sta->addr, |
67d62035 | 2238 | 0, CMD_ASYNC, NULL); |
b481de9c ZY |
2239 | } |
2240 | if ((sta_id != IWL_INVALID_STATION)) { | |
c33104f0 TW |
2241 | lq_sta->lq.sta_id = sta_id; |
2242 | lq_sta->lq.rs_table[0].rate_n_flags = 0; | |
b481de9c ZY |
2243 | } |
2244 | /* FIXME: this is w/a remove it later */ | |
2245 | priv->assoc_station_added = 1; | |
2246 | } | |
2247 | ||
77626355 | 2248 | /* Find highest tx rate supported by hardware and destination station */ |
8318d78a JB |
2249 | for (i = 0; i < sband->n_bitrates; i++) |
2250 | if (sta->supp_rates[sband->band] & BIT(i)) | |
2251 | sta->txrate_idx = i; | |
2252 | ||
2253 | sta->last_txrate_idx = sta->txrate_idx; | |
2254 | /* WTF is with this bogus comment? A doesn't have cck rates */ | |
77626355 | 2255 | /* For MODE_IEEE80211A, cck rates are at end of rate table */ |
8318d78a JB |
2256 | if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) |
2257 | sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; | |
b481de9c | 2258 | |
c33104f0 | 2259 | lq_sta->is_dup = 0; |
c33104f0 | 2260 | lq_sta->is_green = rs_use_green(priv, conf); |
39e88504 | 2261 | lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000); |
c33104f0 | 2262 | lq_sta->active_rate_basic = priv->active_rate_basic; |
8318d78a | 2263 | lq_sta->band = priv->band; |
c8b0e6e1 | 2264 | #ifdef CONFIG_IWL4965_HT |
77626355 BC |
2265 | /* |
2266 | * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3), | |
2267 | * supp_rates[] does not; shift to convert format, force 9 MBits off. | |
2268 | */ | |
fde0db31 GC |
2269 | lq_sta->active_siso_rate = |
2270 | priv->current_ht_config.supp_mcs_set[0] << 1; | |
c33104f0 | 2271 | lq_sta->active_siso_rate |= |
fde0db31 | 2272 | priv->current_ht_config.supp_mcs_set[0] & 0x1; |
c33104f0 | 2273 | lq_sta->active_siso_rate &= ~((u16)0x2); |
fde0db31 | 2274 | lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; |
b481de9c | 2275 | |
77626355 | 2276 | /* Same here */ |
fde0db31 GC |
2277 | lq_sta->active_mimo2_rate = |
2278 | priv->current_ht_config.supp_mcs_set[1] << 1; | |
2279 | lq_sta->active_mimo2_rate |= | |
2280 | priv->current_ht_config.supp_mcs_set[1] & 0x1; | |
2281 | lq_sta->active_mimo2_rate &= ~((u16)0x2); | |
2282 | lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; | |
2283 | ||
2284 | lq_sta->active_mimo3_rate = | |
2285 | priv->current_ht_config.supp_mcs_set[2] << 1; | |
2286 | lq_sta->active_mimo3_rate |= | |
2287 | priv->current_ht_config.supp_mcs_set[2] & 0x1; | |
2288 | lq_sta->active_mimo3_rate &= ~((u16)0x2); | |
2289 | lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; | |
2290 | ||
07bc28ed | 2291 | IWL_DEBUG_RATE("SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n", |
c33104f0 | 2292 | lq_sta->active_siso_rate, |
fde0db31 GC |
2293 | lq_sta->active_mimo2_rate, |
2294 | lq_sta->active_mimo3_rate); | |
2295 | ||
07bc28ed GC |
2296 | /* These values will be overriden later */ |
2297 | lq_sta->lq.general_params.single_stream_ant_msk = ANT_A; | |
2298 | lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; | |
2299 | ||
0c11b4de RR |
2300 | /* as default allow aggregation for all tids */ |
2301 | lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; | |
c8b0e6e1 | 2302 | #endif /*CONFIG_IWL4965_HT*/ |
98d7e09a | 2303 | #ifdef CONFIG_MAC80211_DEBUGFS |
c33104f0 | 2304 | lq_sta->drv = priv; |
98d7e09a | 2305 | #endif |
b481de9c ZY |
2306 | |
2307 | if (priv->assoc_station_added) | |
2308 | priv->lq_mngr.lq_ready = 1; | |
2309 | ||
270243a5 | 2310 | rs_initialize_lq(priv, conf, sta); |
b481de9c ZY |
2311 | } |
2312 | ||
fde0db31 GC |
2313 | static void rs_fill_link_cmd(const struct iwl_priv *priv, |
2314 | struct iwl4965_lq_sta *lq_sta, | |
07bc28ed | 2315 | u32 new_rate) |
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; |
07bc28ed | 2324 | struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq; |
b481de9c | 2325 | |
77626355 | 2326 | /* Override starting rate (index 0) if needed for debug purposes */ |
39e88504 | 2327 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
98d7e09a | 2328 | |
39e88504 | 2329 | /* Interpret new_rate (rate_n_flags) */ |
aade00ce | 2330 | memset(&tbl_type, 0, sizeof(tbl_type)); |
39e88504 | 2331 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
b481de9c ZY |
2332 | &tbl_type, &rate_idx); |
2333 | ||
77626355 | 2334 | /* How many times should we repeat the initial rate? */ |
b481de9c | 2335 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce | 2336 | ant_toggle_cnt = 1; |
1b696de2 | 2337 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2338 | } else { |
1b696de2 | 2339 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2340 | } |
b481de9c ZY |
2341 | |
2342 | lq_cmd->general_params.mimo_delimiter = | |
2343 | is_mimo(tbl_type.lq_type) ? 1 : 0; | |
77626355 BC |
2344 | |
2345 | /* Fill 1st table entry (index 0) */ | |
39e88504 | 2346 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c | 2347 | |
07bc28ed GC |
2348 | if (num_of_ant(tbl_type.ant_type) == 1) { |
2349 | lq_cmd->general_params.single_stream_ant_msk = | |
2350 | tbl_type.ant_type; | |
2351 | } else if (num_of_ant(tbl_type.ant_type) == 2) { | |
2352 | lq_cmd->general_params.dual_stream_ant_msk = | |
2353 | tbl_type.ant_type; | |
2354 | } /* otherwise we don't modify the existing value */ | |
b481de9c ZY |
2355 | |
2356 | index++; | |
1b696de2 | 2357 | repeat_rate--; |
b481de9c | 2358 | |
aade00ce GC |
2359 | if (priv) |
2360 | valid_tx_ant = priv->hw_params.valid_tx_ant; | |
2361 | ||
77626355 | 2362 | /* Fill rest of rate table */ |
b481de9c | 2363 | while (index < LINK_QUAL_MAX_RETRY_NUM) { |
77626355 BC |
2364 | /* Repeat initial/next rate. |
2365 | * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. | |
2366 | * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ | |
1b696de2 | 2367 | while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
b481de9c | 2368 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2369 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2370 | ant_toggle_cnt++; | |
2371 | else if (priv && | |
2372 | rs_toggle_antenna(valid_tx_ant, | |
2373 | &new_rate, &tbl_type)) | |
2374 | ant_toggle_cnt = 1; | |
2375 | } | |
98d7e09a | 2376 | |
77626355 | 2377 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2378 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2379 | |
2380 | /* Fill next table entry */ | |
b481de9c | 2381 | lq_cmd->rs_table[index].rate_n_flags = |
39e88504 | 2382 | cpu_to_le32(new_rate); |
1b696de2 | 2383 | repeat_rate--; |
b481de9c ZY |
2384 | index++; |
2385 | } | |
2386 | ||
39e88504 | 2387 | rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
b481de9c ZY |
2388 | &rate_idx); |
2389 | ||
77626355 BC |
2390 | /* Indicate to uCode which entries might be MIMO. |
2391 | * If initial rate was MIMO, this will finally end up | |
2392 | * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ | |
b481de9c ZY |
2393 | if (is_mimo(tbl_type.lq_type)) |
2394 | lq_cmd->general_params.mimo_delimiter = index; | |
2395 | ||
77626355 | 2396 | /* Get next rate */ |
39e88504 GC |
2397 | new_rate = rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
2398 | use_ht_possible); | |
b481de9c | 2399 | |
77626355 | 2400 | /* How many times should we repeat the next rate? */ |
b481de9c | 2401 | if (is_legacy(tbl_type.lq_type)) { |
aade00ce GC |
2402 | if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
2403 | ant_toggle_cnt++; | |
2404 | else if (priv && | |
2405 | rs_toggle_antenna(valid_tx_ant, | |
2406 | &new_rate, &tbl_type)) | |
2407 | ant_toggle_cnt = 1; | |
2408 | ||
1b696de2 | 2409 | repeat_rate = IWL_NUMBER_TRY; |
aade00ce | 2410 | } else { |
1b696de2 | 2411 | repeat_rate = IWL_HT_NUMBER_TRY; |
aade00ce | 2412 | } |
b481de9c | 2413 | |
77626355 BC |
2414 | /* Don't allow HT rates after next pass. |
2415 | * rs_get_lower_rate() will change type to LQ_A or LQ_G. */ | |
b481de9c ZY |
2416 | use_ht_possible = 0; |
2417 | ||
77626355 | 2418 | /* Override next rate if needed for debug purposes */ |
c33104f0 | 2419 | rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
77626355 BC |
2420 | |
2421 | /* Fill next table entry */ | |
39e88504 | 2422 | lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
b481de9c ZY |
2423 | |
2424 | index++; | |
1b696de2 | 2425 | repeat_rate--; |
b481de9c ZY |
2426 | } |
2427 | ||
b481de9c ZY |
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 | ||
bf403db8 | 2453 | static void rs_free_sta(void *priv_rate, void *priv_sta) |
b481de9c | 2454 | { |
c33104f0 | 2455 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
bf403db8 | 2456 | struct iwl_priv *priv; |
b481de9c | 2457 | |
bf403db8 | 2458 | priv = (struct iwl_priv *)priv_rate; |
b481de9c | 2459 | IWL_DEBUG_RATE("enter\n"); |
c33104f0 | 2460 | kfree(lq_sta); |
b481de9c ZY |
2461 | IWL_DEBUG_RATE("leave\n"); |
2462 | } | |
2463 | ||
2464 | ||
93dc646a | 2465 | #ifdef CONFIG_MAC80211_DEBUGFS |
5ae212c9 ZY |
2466 | static int open_file_generic(struct inode *inode, struct file *file) |
2467 | { | |
2468 | file->private_data = inode->i_private; | |
2469 | return 0; | |
2470 | } | |
c33104f0 | 2471 | static void rs_dbgfs_set_mcs(struct iwl4965_lq_sta *lq_sta, |
39e88504 | 2472 | u32 *rate_n_flags, int index) |
98d7e09a | 2473 | { |
bf403db8 EK |
2474 | struct iwl_priv *priv; |
2475 | ||
2476 | priv = lq_sta->drv; | |
39e88504 GC |
2477 | if (lq_sta->dbg_fixed_rate) { |
2478 | if (index < 12) { | |
2479 | *rate_n_flags = lq_sta->dbg_fixed_rate; | |
2480 | } else { | |
2481 | if (lq_sta->band == IEEE80211_BAND_5GHZ) | |
2482 | *rate_n_flags = 0x800D; | |
2483 | else | |
2484 | *rate_n_flags = 0x820A; | |
2485 | } | |
98d7e09a | 2486 | IWL_DEBUG_RATE("Fixed rate ON\n"); |
39e88504 GC |
2487 | } else { |
2488 | IWL_DEBUG_RATE("Fixed rate OFF\n"); | |
98d7e09a | 2489 | } |
98d7e09a | 2490 | } |
5ae212c9 | 2491 | |
98d7e09a ZY |
2492 | static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
2493 | const char __user *user_buf, size_t count, loff_t *ppos) | |
2494 | { | |
c33104f0 | 2495 | struct iwl4965_lq_sta *lq_sta = file->private_data; |
bf403db8 | 2496 | struct iwl_priv *priv; |
98d7e09a ZY |
2497 | char buf[64]; |
2498 | int buf_size; | |
2499 | u32 parsed_rate; | |
2500 | ||
bf403db8 | 2501 | priv = lq_sta->drv; |
98d7e09a ZY |
2502 | memset(buf, 0, sizeof(buf)); |
2503 | buf_size = min(count, sizeof(buf) - 1); | |
2504 | if (copy_from_user(buf, user_buf, buf_size)) | |
2505 | return -EFAULT; | |
2506 | ||
2507 | if (sscanf(buf, "%x", &parsed_rate) == 1) | |
39e88504 | 2508 | lq_sta->dbg_fixed_rate = parsed_rate; |
98d7e09a | 2509 | else |
39e88504 | 2510 | lq_sta->dbg_fixed_rate = 0; |
98d7e09a | 2511 | |
39e88504 GC |
2512 | lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ |
2513 | lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2514 | lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
2515 | lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ | |
98d7e09a ZY |
2516 | |
2517 | IWL_DEBUG_RATE("sta_id %d rate 0x%X\n", | |
39e88504 | 2518 | lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
98d7e09a | 2519 | |
39e88504 | 2520 | if (lq_sta->dbg_fixed_rate) { |
07bc28ed | 2521 | rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
66c73db7 | 2522 | iwl_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC); |
98d7e09a ZY |
2523 | } |
2524 | ||
2525 | return count; | |
2526 | } | |
0209dc11 | 2527 | |
5ae212c9 ZY |
2528 | static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
2529 | char __user *user_buf, size_t count, loff_t *ppos) | |
2530 | { | |
2531 | char buff[1024]; | |
2532 | int desc = 0; | |
2533 | int i = 0; | |
2534 | ||
c33104f0 | 2535 | struct iwl4965_lq_sta *lq_sta = file->private_data; |
5ae212c9 | 2536 | |
c33104f0 | 2537 | desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); |
98d7e09a | 2538 | desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
c33104f0 | 2539 | lq_sta->total_failed, lq_sta->total_success, |
39e88504 | 2540 | lq_sta->active_legacy_rate); |
98d7e09a | 2541 | desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
39e88504 | 2542 | lq_sta->dbg_fixed_rate); |
5ae212c9 ZY |
2543 | desc += sprintf(buff+desc, "general:" |
2544 | "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", | |
c33104f0 TW |
2545 | lq_sta->lq.general_params.flags, |
2546 | lq_sta->lq.general_params.mimo_delimiter, | |
2547 | lq_sta->lq.general_params.single_stream_ant_msk, | |
2548 | lq_sta->lq.general_params.dual_stream_ant_msk); | |
5ae212c9 ZY |
2549 | |
2550 | desc += sprintf(buff+desc, "agg:" | |
2551 | "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", | |
c33104f0 TW |
2552 | le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit), |
2553 | lq_sta->lq.agg_params.agg_dis_start_th, | |
2554 | lq_sta->lq.agg_params.agg_frame_cnt_limit); | |
5ae212c9 ZY |
2555 | |
2556 | desc += sprintf(buff+desc, | |
2557 | "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", | |
c33104f0 TW |
2558 | lq_sta->lq.general_params.start_rate_index[0], |
2559 | lq_sta->lq.general_params.start_rate_index[1], | |
2560 | lq_sta->lq.general_params.start_rate_index[2], | |
2561 | lq_sta->lq.general_params.start_rate_index[3]); | |
5ae212c9 ZY |
2562 | |
2563 | ||
2564 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
2565 | desc += sprintf(buff+desc, " rate[%d] 0x%X\n", | |
c33104f0 | 2566 | i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); |
5ae212c9 ZY |
2567 | |
2568 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2569 | } | |
2570 | ||
2571 | static const struct file_operations rs_sta_dbgfs_scale_table_ops = { | |
98d7e09a | 2572 | .write = rs_sta_dbgfs_scale_table_write, |
5ae212c9 ZY |
2573 | .read = rs_sta_dbgfs_scale_table_read, |
2574 | .open = open_file_generic, | |
2575 | }; | |
0209dc11 ZY |
2576 | static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
2577 | char __user *user_buf, size_t count, loff_t *ppos) | |
2578 | { | |
2579 | char buff[1024]; | |
2580 | int desc = 0; | |
2581 | int i, j; | |
2582 | ||
c33104f0 | 2583 | struct iwl4965_lq_sta *lq_sta = file->private_data; |
0209dc11 ZY |
2584 | for (i = 0; i < LQ_SIZE; i++) { |
2585 | desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" | |
2586 | "rate=0x%X\n", | |
c33104f0 TW |
2587 | lq_sta->active_tbl == i?"*":"x", |
2588 | lq_sta->lq_info[i].lq_type, | |
2589 | lq_sta->lq_info[i].is_SGI, | |
2590 | lq_sta->lq_info[i].is_fat, | |
2591 | lq_sta->lq_info[i].is_dup, | |
39e88504 | 2592 | lq_sta->lq_info[i].current_rate); |
0209dc11 ZY |
2593 | for (j = 0; j < IWL_RATE_COUNT; j++) { |
2594 | desc += sprintf(buff+desc, | |
c33104f0 TW |
2595 | "counter=%d success=%d %%=%d\n", |
2596 | lq_sta->lq_info[i].win[j].counter, | |
2597 | lq_sta->lq_info[i].win[j].success_counter, | |
2598 | lq_sta->lq_info[i].win[j].success_ratio); | |
0209dc11 ZY |
2599 | } |
2600 | } | |
2601 | return simple_read_from_buffer(user_buf, count, ppos, buff, desc); | |
2602 | } | |
2603 | ||
2604 | static const struct file_operations rs_sta_dbgfs_stats_table_ops = { | |
2605 | .read = rs_sta_dbgfs_stats_table_read, | |
2606 | .open = open_file_generic, | |
2607 | }; | |
5ae212c9 | 2608 | |
93dc646a ZY |
2609 | static void rs_add_debugfs(void *priv, void *priv_sta, |
2610 | struct dentry *dir) | |
2611 | { | |
c33104f0 TW |
2612 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
2613 | lq_sta->rs_sta_dbgfs_scale_table_file = | |
0209dc11 | 2614 | debugfs_create_file("rate_scale_table", 0600, dir, |
c33104f0 TW |
2615 | lq_sta, &rs_sta_dbgfs_scale_table_ops); |
2616 | lq_sta->rs_sta_dbgfs_stats_table_file = | |
0209dc11 | 2617 | debugfs_create_file("rate_stats_table", 0600, dir, |
c33104f0 | 2618 | lq_sta, &rs_sta_dbgfs_stats_table_ops); |
0c11b4de RR |
2619 | #ifdef CONFIG_IWL4965_HT |
2620 | lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = | |
2621 | debugfs_create_u8("tx_agg_tid_enable", 0600, dir, | |
2622 | &lq_sta->tx_agg_tid_en); | |
2623 | #endif | |
2624 | ||
93dc646a ZY |
2625 | } |
2626 | ||
2627 | static void rs_remove_debugfs(void *priv, void *priv_sta) | |
2628 | { | |
c33104f0 TW |
2629 | struct iwl4965_lq_sta *lq_sta = priv_sta; |
2630 | debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); | |
2631 | debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); | |
0c11b4de RR |
2632 | #ifdef CONFIG_IWL4965_HT |
2633 | debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); | |
2634 | #endif | |
93dc646a ZY |
2635 | } |
2636 | #endif | |
2637 | ||
b481de9c ZY |
2638 | static struct rate_control_ops rs_ops = { |
2639 | .module = NULL, | |
2640 | .name = RS_NAME, | |
2641 | .tx_status = rs_tx_status, | |
2642 | .get_rate = rs_get_rate, | |
2643 | .rate_init = rs_rate_init, | |
2644 | .clear = rs_clear, | |
2645 | .alloc = rs_alloc, | |
2646 | .free = rs_free, | |
2647 | .alloc_sta = rs_alloc_sta, | |
2648 | .free_sta = rs_free_sta, | |
93dc646a ZY |
2649 | #ifdef CONFIG_MAC80211_DEBUGFS |
2650 | .add_sta_debugfs = rs_add_debugfs, | |
2651 | .remove_sta_debugfs = rs_remove_debugfs, | |
2652 | #endif | |
b481de9c ZY |
2653 | }; |
2654 | ||
bb8c093b | 2655 | int iwl4965_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id) |
b481de9c ZY |
2656 | { |
2657 | struct ieee80211_local *local = hw_to_local(hw); | |
c79dd5b5 | 2658 | struct iwl_priv *priv = hw->priv; |
c33104f0 | 2659 | struct iwl4965_lq_sta *lq_sta; |
b481de9c | 2660 | struct sta_info *sta; |
c33104f0 | 2661 | int cnt = 0, i; |
b481de9c ZY |
2662 | u32 samples = 0, success = 0, good = 0; |
2663 | unsigned long now = jiffies; | |
2664 | u32 max_time = 0; | |
2665 | u8 lq_type, antenna; | |
2666 | ||
d0709a65 JB |
2667 | rcu_read_lock(); |
2668 | ||
b481de9c ZY |
2669 | sta = sta_info_get(local, priv->stations[sta_id].sta.sta.addr); |
2670 | if (!sta || !sta->rate_ctrl_priv) { | |
d0709a65 | 2671 | if (sta) |
b481de9c | 2672 | IWL_DEBUG_RATE("leave - no private rate data!\n"); |
d0709a65 | 2673 | else |
b481de9c | 2674 | IWL_DEBUG_RATE("leave - no station!\n"); |
d0709a65 | 2675 | rcu_read_unlock(); |
b481de9c ZY |
2676 | return sprintf(buf, "station %d not found\n", sta_id); |
2677 | } | |
2678 | ||
c33104f0 | 2679 | lq_sta = (void *)sta->rate_ctrl_priv; |
b481de9c | 2680 | |
c33104f0 | 2681 | lq_type = lq_sta->lq_info[lq_sta->active_tbl].lq_type; |
fde0db31 | 2682 | antenna = lq_sta->lq_info[lq_sta->active_tbl].ant_type; |
b481de9c ZY |
2683 | |
2684 | if (is_legacy(lq_type)) | |
2685 | i = IWL_RATE_54M_INDEX; | |
2686 | else | |
2687 | i = IWL_RATE_60M_INDEX; | |
2688 | while (1) { | |
2689 | u64 mask; | |
2690 | int j; | |
c33104f0 | 2691 | int active = lq_sta->active_tbl; |
b481de9c | 2692 | |
c33104f0 | 2693 | cnt += |
1826dcc0 | 2694 | sprintf(&buf[cnt], " %2dMbs: ", iwl_rates[i].ieee / 2); |
b481de9c ZY |
2695 | |
2696 | mask = (1ULL << (IWL_RATE_MAX_WINDOW - 1)); | |
2697 | for (j = 0; j < IWL_RATE_MAX_WINDOW; j++, mask >>= 1) | |
c33104f0 TW |
2698 | buf[cnt++] = |
2699 | (lq_sta->lq_info[active].win[i].data & mask) | |
b481de9c ZY |
2700 | ? '1' : '0'; |
2701 | ||
c33104f0 TW |
2702 | samples += lq_sta->lq_info[active].win[i].counter; |
2703 | good += lq_sta->lq_info[active].win[i].success_counter; | |
2704 | success += lq_sta->lq_info[active].win[i].success_counter * | |
1826dcc0 | 2705 | iwl_rates[i].ieee; |
b481de9c | 2706 | |
c33104f0 | 2707 | if (lq_sta->lq_info[active].win[i].stamp) { |
b481de9c ZY |
2708 | int delta = |
2709 | jiffies_to_msecs(now - | |
c33104f0 | 2710 | lq_sta->lq_info[active].win[i].stamp); |
b481de9c ZY |
2711 | |
2712 | if (delta > max_time) | |
2713 | max_time = delta; | |
2714 | ||
c33104f0 | 2715 | cnt += sprintf(&buf[cnt], "%5dms\n", delta); |
b481de9c | 2716 | } else |
c33104f0 | 2717 | buf[cnt++] = '\n'; |
b481de9c | 2718 | |
bb8c093b | 2719 | j = iwl4965_get_prev_ieee_rate(i); |
b481de9c ZY |
2720 | if (j == i) |
2721 | break; | |
2722 | i = j; | |
2723 | } | |
2724 | ||
1826dcc0 TW |
2725 | /* |
2726 | * Display the average rate of all samples taken. | |
2727 | * NOTE: We multiply # of samples by 2 since the IEEE measurement | |
2728 | * added from iwl_rates is actually 2X the rate. | |
2729 | */ | |
b481de9c | 2730 | if (samples) |
c33104f0 | 2731 | cnt += sprintf(&buf[cnt], |
b481de9c ZY |
2732 | "\nAverage rate is %3d.%02dMbs over last %4dms\n" |
2733 | "%3d%% success (%d good packets over %d tries)\n", | |
2734 | success / (2 * samples), (success * 5 / samples) % 10, | |
2735 | max_time, good * 100 / samples, good, samples); | |
2736 | else | |
c33104f0 TW |
2737 | cnt += sprintf(&buf[cnt], "\nAverage rate: 0Mbs\n"); |
2738 | ||
2739 | cnt += sprintf(&buf[cnt], "\nrate scale type %d antenna %d " | |
b481de9c | 2740 | "active_search %d rate index %d\n", lq_type, antenna, |
8318d78a | 2741 | lq_sta->search_better_tbl, sta->last_txrate_idx); |
b481de9c | 2742 | |
d0709a65 | 2743 | rcu_read_unlock(); |
c33104f0 | 2744 | return cnt; |
b481de9c ZY |
2745 | } |
2746 | ||
bb8c093b | 2747 | void iwl4965_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id) |
b481de9c | 2748 | { |
c79dd5b5 | 2749 | struct iwl_priv *priv = hw->priv; |
b481de9c ZY |
2750 | |
2751 | priv->lq_mngr.lq_ready = 1; | |
2752 | } | |
2753 | ||
897e1cf2 | 2754 | int iwl4965_rate_control_register(void) |
b481de9c | 2755 | { |
897e1cf2 | 2756 | return ieee80211_rate_control_register(&rs_ops); |
b481de9c ZY |
2757 | } |
2758 | ||
897e1cf2 | 2759 | void iwl4965_rate_control_unregister(void) |
b481de9c ZY |
2760 | { |
2761 | ieee80211_rate_control_unregister(&rs_ops); | |
2762 | } | |
2763 |